| /* PowerPC64-specific support for 64-bit ELF. |
| Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
| Written by Linus Nordberg, Swox AB <info@swox.com>, |
| based on elf32-ppc.c by Ian Lance Taylor. |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| /* This file is based on the 64-bit PowerPC ELF ABI. It is also based |
| on the file elf32-ppc.c. */ |
| |
| #include "bfd.h" |
| #include "sysdep.h" |
| #include "bfdlink.h" |
| #include "libbfd.h" |
| #include "elf-bfd.h" |
| #include "elf/ppc64.h" |
| #include "elf64-ppc.h" |
| |
| static void ppc_howto_init |
| PARAMS ((void)); |
| static reloc_howto_type *ppc64_elf_reloc_type_lookup |
| PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); |
| static void ppc64_elf_info_to_howto |
| PARAMS ((bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)); |
| static bfd_reloc_status_type ppc64_elf_ha_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type ppc64_elf_brtaken_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type ppc64_elf_sectoff_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type ppc64_elf_sectoff_ha_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type ppc64_elf_toc_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type ppc64_elf_toc_ha_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type ppc64_elf_toc64_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type ppc64_elf_unhandled_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_boolean ppc64_elf_object_p |
| PARAMS ((bfd *)); |
| static bfd_boolean ppc64_elf_merge_private_bfd_data |
| PARAMS ((bfd *, bfd *)); |
| static bfd_boolean ppc64_elf_new_section_hook |
| PARAMS ((bfd *, asection *)); |
| |
| |
| #define TARGET_LITTLE_SYM bfd_elf64_powerpcle_vec |
| #define TARGET_LITTLE_NAME "elf64-powerpcle" |
| #define TARGET_BIG_SYM bfd_elf64_powerpc_vec |
| #define TARGET_BIG_NAME "elf64-powerpc" |
| #define ELF_ARCH bfd_arch_powerpc |
| #define ELF_MACHINE_CODE EM_PPC64 |
| #define ELF_MAXPAGESIZE 0x10000 |
| #define elf_info_to_howto ppc64_elf_info_to_howto |
| |
| #define elf_backend_want_got_sym 0 |
| #define elf_backend_want_plt_sym 0 |
| #define elf_backend_plt_alignment 3 |
| #define elf_backend_plt_not_loaded 1 |
| #define elf_backend_got_symbol_offset 0 |
| #define elf_backend_got_header_size 8 |
| #define elf_backend_plt_header_size PLT_INITIAL_ENTRY_SIZE |
| #define elf_backend_can_gc_sections 1 |
| #define elf_backend_can_refcount 1 |
| #define elf_backend_rela_normal 1 |
| |
| #define bfd_elf64_bfd_reloc_type_lookup ppc64_elf_reloc_type_lookup |
| #define bfd_elf64_bfd_merge_private_bfd_data ppc64_elf_merge_private_bfd_data |
| #define bfd_elf64_new_section_hook ppc64_elf_new_section_hook |
| #define bfd_elf64_bfd_link_hash_table_create ppc64_elf_link_hash_table_create |
| #define bfd_elf64_bfd_link_hash_table_free ppc64_elf_link_hash_table_free |
| |
| #define elf_backend_object_p ppc64_elf_object_p |
| #define elf_backend_create_dynamic_sections ppc64_elf_create_dynamic_sections |
| #define elf_backend_copy_indirect_symbol ppc64_elf_copy_indirect_symbol |
| #define elf_backend_check_relocs ppc64_elf_check_relocs |
| #define elf_backend_gc_mark_hook ppc64_elf_gc_mark_hook |
| #define elf_backend_gc_sweep_hook ppc64_elf_gc_sweep_hook |
| #define elf_backend_adjust_dynamic_symbol ppc64_elf_adjust_dynamic_symbol |
| #define elf_backend_hide_symbol ppc64_elf_hide_symbol |
| #define elf_backend_always_size_sections ppc64_elf_func_desc_adjust |
| #define elf_backend_size_dynamic_sections ppc64_elf_size_dynamic_sections |
| #define elf_backend_relocate_section ppc64_elf_relocate_section |
| #define elf_backend_finish_dynamic_symbol ppc64_elf_finish_dynamic_symbol |
| #define elf_backend_reloc_type_class ppc64_elf_reloc_type_class |
| #define elf_backend_finish_dynamic_sections ppc64_elf_finish_dynamic_sections |
| |
| /* The name of the dynamic interpreter. This is put in the .interp |
| section. */ |
| #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" |
| |
| /* The size in bytes of an entry in the procedure linkage table. */ |
| #define PLT_ENTRY_SIZE 24 |
| |
| /* The initial size of the plt reserved for the dynamic linker. */ |
| #define PLT_INITIAL_ENTRY_SIZE PLT_ENTRY_SIZE |
| |
| /* TOC base pointers offset from start of TOC. */ |
| #define TOC_BASE_OFF 0x8000 |
| |
| /* Offset of tp and dtp pointers from start of TLS block. */ |
| #define TP_OFFSET 0x7000 |
| #define DTP_OFFSET 0x8000 |
| |
| /* .plt call stub instructions. The normal stub is like this, but |
| sometimes the .plt entry crosses a 64k boundary and we need to |
| insert an addis to adjust r12. */ |
| #define PLT_CALL_STUB_SIZE (7*4) |
| #define ADDIS_R12_R2 0x3d820000 /* addis %r12,%r2,xxx@ha */ |
| #define STD_R2_40R1 0xf8410028 /* std %r2,40(%r1) */ |
| #define LD_R11_0R12 0xe96c0000 /* ld %r11,xxx+0@l(%r12) */ |
| #define LD_R2_0R12 0xe84c0000 /* ld %r2,xxx+8@l(%r12) */ |
| #define MTCTR_R11 0x7d6903a6 /* mtctr %r11 */ |
| /* ld %r11,xxx+16@l(%r12) */ |
| #define BCTR 0x4e800420 /* bctr */ |
| |
| |
| #define ADDIS_R2_R2 0x3c420000 /* addis %r2,%r2,off@ha */ |
| #define ADDI_R2_R2 0x38420000 /* addi %r2,%r2,off@l */ |
| |
| #define LD_R2_40R1 0xe8410028 /* ld %r2,40(%r1) */ |
| |
| /* glink call stub instructions. We enter with the index in R0, and the |
| address of glink entry in CTR. From that, we can calculate PLT0. */ |
| #define GLINK_CALL_STUB_SIZE (16*4) |
| #define MFCTR_R12 0x7d8902a6 /* mfctr %r12 */ |
| #define SLDI_R11_R0_3 0x780b1f24 /* sldi %r11,%r0,3 */ |
| #define ADDIC_R2_R0_32K 0x34408000 /* addic. %r2,%r0,-32768 */ |
| #define SUB_R12_R12_R11 0x7d8b6050 /* sub %r12,%r12,%r11 */ |
| #define SRADI_R2_R2_63 0x7c42fe76 /* sradi %r2,%r2,63 */ |
| #define SLDI_R11_R0_2 0x780b1764 /* sldi %r11,%r0,2 */ |
| #define AND_R2_R2_R11 0x7c425838 /* and %r2,%r2,%r11 */ |
| /* sub %r12,%r12,%r11 */ |
| #define ADD_R12_R12_R2 0x7d8c1214 /* add %r12,%r12,%r2 */ |
| #define ADDIS_R12_R12 0x3d8c0000 /* addis %r12,%r12,xxx@ha */ |
| /* ld %r11,xxx@l(%r12) */ |
| #define ADDI_R12_R12 0x398c0000 /* addi %r12,%r12,xxx@l */ |
| /* ld %r2,8(%r12) */ |
| /* mtctr %r11 */ |
| /* ld %r11,16(%r12) */ |
| /* bctr */ |
| |
| /* Pad with this. */ |
| #define NOP 0x60000000 |
| |
| /* Some other nops. */ |
| #define CROR_151515 0x4def7b82 |
| #define CROR_313131 0x4ffffb82 |
| |
| /* .glink entries for the first 32k functions are two instructions. */ |
| #define LI_R0_0 0x38000000 /* li %r0,0 */ |
| #define B_DOT 0x48000000 /* b . */ |
| |
| /* After that, we need two instructions to load the index, followed by |
| a branch. */ |
| #define LIS_R0_0 0x3c000000 /* lis %r0,0 */ |
| #define ORI_R0_R0_0 0x60000000 /* ori %r0,%r0,0 */ |
| |
| /* Instructions to save and restore floating point regs. */ |
| #define STFD_FR0_0R1 0xd8010000 /* stfd %fr0,0(%r1) */ |
| #define LFD_FR0_0R1 0xc8010000 /* lfd %fr0,0(%r1) */ |
| #define BLR 0x4e800020 /* blr */ |
| |
| /* Since .opd is an array of descriptors and each entry will end up |
| with identical R_PPC64_RELATIVE relocs, there is really no need to |
| propagate .opd relocs; The dynamic linker should be taught to |
| relocate .opd without reloc entries. */ |
| #ifndef NO_OPD_RELOCS |
| #define NO_OPD_RELOCS 0 |
| #endif |
| |
| #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1) |
| |
| /* Relocation HOWTO's. */ |
| static reloc_howto_type *ppc64_elf_howto_table[(int) R_PPC64_max]; |
| |
| static reloc_howto_type ppc64_elf_howto_raw[] = { |
| /* This reloc does nothing. */ |
| HOWTO (R_PPC64_NONE, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_NONE", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A standard 32 bit relocation. */ |
| HOWTO (R_PPC64_ADDR32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR32", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* An absolute 26 bit branch; the lower two bits must be zero. |
| FIXME: we don't check that, we just clear them. */ |
| HOWTO (R_PPC64_ADDR24, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 26, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR24", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x03fffffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A standard 16 bit relocation. */ |
| HOWTO (R_PPC64_ADDR16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A 16 bit relocation without overflow. */ |
| HOWTO (R_PPC64_ADDR16_LO, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Bits 16-31 of an address. */ |
| HOWTO (R_PPC64_ADDR16_HI, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Bits 16-31 of an address, plus 1 if the contents of the low 16 |
| bits, treated as a signed number, is negative. */ |
| HOWTO (R_PPC64_ADDR16_HA, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_ha_reloc, /* special_function */ |
| "R_PPC64_ADDR16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* An absolute 16 bit branch; the lower two bits must be zero. |
| FIXME: we don't check that, we just clear them. */ |
| HOWTO (R_PPC64_ADDR14, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR14", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x0000fffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* An absolute 16 bit branch, for which bit 10 should be set to |
| indicate that the branch is expected to be taken. The lower two |
| bits must be zero. */ |
| HOWTO (R_PPC64_ADDR14_BRTAKEN, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc64_elf_brtaken_reloc, /* special_function */ |
| "R_PPC64_ADDR14_BRTAKEN",/* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x0000fffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* An absolute 16 bit branch, for which bit 10 should be set to |
| indicate that the branch is not expected to be taken. The lower |
| two bits must be zero. */ |
| HOWTO (R_PPC64_ADDR14_BRNTAKEN, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc64_elf_brtaken_reloc, /* special_function */ |
| "R_PPC64_ADDR14_BRNTAKEN",/* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x0000fffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A relative 26 bit branch; the lower two bits must be zero. */ |
| HOWTO (R_PPC64_REL24, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 26, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_REL24", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x03fffffc, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* A relative 16 bit branch; the lower two bits must be zero. */ |
| HOWTO (R_PPC64_REL14, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_REL14", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x0000fffc, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| the branch is expected to be taken. The lower two bits must be |
| zero. */ |
| HOWTO (R_PPC64_REL14_BRTAKEN, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_brtaken_reloc, /* special_function */ |
| "R_PPC64_REL14_BRTAKEN", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x0000fffc, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* A relative 16 bit branch. Bit 10 should be set to indicate that |
| the branch is not expected to be taken. The lower two bits must |
| be zero. */ |
| HOWTO (R_PPC64_REL14_BRNTAKEN, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_brtaken_reloc, /* special_function */ |
| "R_PPC64_REL14_BRNTAKEN",/* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x0000fffc, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16, but referring to the GOT table entry for the |
| symbol. */ |
| HOWTO (R_PPC64_GOT16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16_LO, but referring to the GOT table entry for |
| the symbol. */ |
| HOWTO (R_PPC64_GOT16_LO, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16_HI, but referring to the GOT table entry for |
| the symbol. */ |
| HOWTO (R_PPC64_GOT16_HI, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16_HA, but referring to the GOT table entry for |
| the symbol. */ |
| HOWTO (R_PPC64_GOT16_HA, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* This is used only by the dynamic linker. The symbol should exist |
| both in the object being run and in some shared library. The |
| dynamic linker copies the data addressed by the symbol from the |
| shared library into the object, because the object being |
| run has to have the data at some particular address. */ |
| HOWTO (R_PPC64_COPY, /* type */ |
| 0, /* rightshift */ |
| 0, /* this one is variable size */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_COPY", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR64, but used when setting global offset table |
| entries. */ |
| HOWTO (R_PPC64_GLOB_DAT, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GLOB_DAT", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Created by the link editor. Marks a procedure linkage table |
| entry for a symbol. */ |
| HOWTO (R_PPC64_JMP_SLOT, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_JMP_SLOT", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Used only by the dynamic linker. When the object is run, this |
| doubleword64 is set to the load address of the object, plus the |
| addend. */ |
| HOWTO (R_PPC64_RELATIVE, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_RELATIVE", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR32, but may be unaligned. */ |
| HOWTO (R_PPC64_UADDR32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_UADDR32", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16, but may be unaligned. */ |
| HOWTO (R_PPC64_UADDR16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_UADDR16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 32-bit PC relative. */ |
| HOWTO (R_PPC64_REL32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| /* FIXME: Verify. Was complain_overflow_bitfield. */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_REL32", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* 32-bit relocation to the symbol's procedure linkage table. */ |
| HOWTO (R_PPC64_PLT32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLT32", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 32-bit PC relative relocation to the symbol's procedure linkage table. |
| FIXME: R_PPC64_PLTREL32 not supported. */ |
| HOWTO (R_PPC64_PLTREL32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_PLTREL32", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16_LO, but referring to the PLT table entry for |
| the symbol. */ |
| HOWTO (R_PPC64_PLT16_LO, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLT16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16_HI, but referring to the PLT table entry for |
| the symbol. */ |
| HOWTO (R_PPC64_PLT16_HI, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLT16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16_HA, but referring to the PLT table entry for |
| the symbol. */ |
| HOWTO (R_PPC64_PLT16_HA, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLT16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 16-bit section relative relocation. */ |
| HOWTO (R_PPC64_SECTOFF, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc64_elf_sectoff_reloc, /* special_function */ |
| "R_PPC64_SECTOFF", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_SECTOFF, but no overflow warning. */ |
| HOWTO (R_PPC64_SECTOFF_LO, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_sectoff_reloc, /* special_function */ |
| "R_PPC64_SECTOFF_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 16-bit upper half section relative relocation. */ |
| HOWTO (R_PPC64_SECTOFF_HI, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_sectoff_reloc, /* special_function */ |
| "R_PPC64_SECTOFF_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 16-bit upper half adjusted section relative relocation. */ |
| HOWTO (R_PPC64_SECTOFF_HA, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_sectoff_ha_reloc, /* special_function */ |
| "R_PPC64_SECTOFF_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_REL24 without touching the two least significant bits. */ |
| HOWTO (R_PPC64_REL30, /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 30, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_REL30", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffffffc, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* Relocs in the 64-bit PowerPC ELF ABI, not in the 32-bit ABI. */ |
| |
| /* A standard 64-bit relocation. */ |
| HOWTO (R_PPC64_ADDR64, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* The bits 32-47 of an address. */ |
| HOWTO (R_PPC64_ADDR16_HIGHER, /* type */ |
| 32, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR16_HIGHER", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* The bits 32-47 of an address, plus 1 if the contents of the low |
| 16 bits, treated as a signed number, is negative. */ |
| HOWTO (R_PPC64_ADDR16_HIGHERA, /* type */ |
| 32, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_ha_reloc, /* special_function */ |
| "R_PPC64_ADDR16_HIGHERA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* The bits 48-63 of an address. */ |
| HOWTO (R_PPC64_ADDR16_HIGHEST,/* type */ |
| 48, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR16_HIGHEST", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* The bits 48-63 of an address, plus 1 if the contents of the low |
| 16 bits, treated as a signed number, is negative. */ |
| HOWTO (R_PPC64_ADDR16_HIGHESTA,/* type */ |
| 48, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_ha_reloc, /* special_function */ |
| "R_PPC64_ADDR16_HIGHESTA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like ADDR64, but may be unaligned. */ |
| HOWTO (R_PPC64_UADDR64, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_UADDR64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 64-bit relative relocation. */ |
| HOWTO (R_PPC64_REL64, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_REL64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* 64-bit relocation to the symbol's procedure linkage table. */ |
| HOWTO (R_PPC64_PLT64, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLT64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 64-bit PC relative relocation to the symbol's procedure linkage |
| table. */ |
| /* FIXME: R_PPC64_PLTREL64 not supported. */ |
| HOWTO (R_PPC64_PLTREL64, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLTREL64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* 16 bit TOC-relative relocation. */ |
| |
| /* R_PPC64_TOC16 47 half16* S + A - .TOC. */ |
| HOWTO (R_PPC64_TOC16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_toc_reloc, /* special_function */ |
| "R_PPC64_TOC16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 16 bit TOC-relative relocation without overflow. */ |
| |
| /* R_PPC64_TOC16_LO 48 half16 #lo (S + A - .TOC.) */ |
| HOWTO (R_PPC64_TOC16_LO, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_toc_reloc, /* special_function */ |
| "R_PPC64_TOC16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 16 bit TOC-relative relocation, high 16 bits. */ |
| |
| /* R_PPC64_TOC16_HI 49 half16 #hi (S + A - .TOC.) */ |
| HOWTO (R_PPC64_TOC16_HI, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_toc_reloc, /* special_function */ |
| "R_PPC64_TOC16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 16 bit TOC-relative relocation, high 16 bits, plus 1 if the |
| contents of the low 16 bits, treated as a signed number, is |
| negative. */ |
| |
| /* R_PPC64_TOC16_HA 50 half16 #ha (S + A - .TOC.) */ |
| HOWTO (R_PPC64_TOC16_HA, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_toc_ha_reloc, /* special_function */ |
| "R_PPC64_TOC16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 64-bit relocation; insert value of TOC base (.TOC.). */ |
| |
| /* R_PPC64_TOC 51 doubleword64 .TOC. */ |
| HOWTO (R_PPC64_TOC, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0=byte, 1=short, 2=long, 4=64 bits) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc64_elf_toc64_reloc, /* special_function */ |
| "R_PPC64_TOC", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_GOT16, but also informs the link editor that the |
| value to relocate may (!) refer to a PLT entry which the link |
| editor (a) may replace with the symbol value. If the link editor |
| is unable to fully resolve the symbol, it may (b) create a PLT |
| entry and store the address to the new PLT entry in the GOT. |
| This permits lazy resolution of function symbols at run time. |
| The link editor may also skip all of this and just (c) emit a |
| R_PPC64_GLOB_DAT to tie the symbol to the GOT entry. */ |
| /* FIXME: R_PPC64_PLTGOT16 not implemented. */ |
| HOWTO (R_PPC64_PLTGOT16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLTGOT16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_PLTGOT16, but without overflow. */ |
| /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ |
| HOWTO (R_PPC64_PLTGOT16_LO, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLTGOT16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address. */ |
| /* FIXME: R_PPC64_PLTGOT16_HI not implemented. */ |
| HOWTO (R_PPC64_PLTGOT16_HI, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLTGOT16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_PLT_GOT16, but using bits 16-31 of the address, plus |
| 1 if the contents of the low 16 bits, treated as a signed number, |
| is negative. */ |
| /* FIXME: R_PPC64_PLTGOT16_HA not implemented. */ |
| HOWTO (R_PPC64_PLTGOT16_HA, /* type */ |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLTGOT16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_ADDR16_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_ADDR16_LO, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_ADDR16_LO_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_ADDR16_LO_DS",/* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_GOT16, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_GOT16_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_GOT16_LO, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_GOT16_LO_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT16_LO_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_PLT16_LO, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_PLT16_LO_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLT16_LO_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_SECTOFF, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_SECTOFF_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| ppc64_elf_sectoff_reloc, /* special_function */ |
| "R_PPC64_SECTOFF_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_SECTOFF_LO, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_SECTOFF_LO_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_sectoff_reloc, /* special_function */ |
| "R_PPC64_SECTOFF_LO_DS",/* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_TOC16, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_TOC16_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_toc_reloc, /* special_function */ |
| "R_PPC64_TOC16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_TOC16_LO, but for instructions with a DS field. */ |
| HOWTO (R_PPC64_TOC16_LO_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_toc_reloc, /* special_function */ |
| "R_PPC64_TOC16_LO_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_PLTGOT16, but for instructions with a DS field. */ |
| /* FIXME: R_PPC64_PLTGOT16_DS not implemented. */ |
| HOWTO (R_PPC64_PLTGOT16_DS, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLTGOT16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like R_PPC64_PLTGOT16_LO, but for instructions with a DS field. */ |
| /* FIXME: R_PPC64_PLTGOT16_LO not implemented. */ |
| HOWTO (R_PPC64_PLTGOT16_LO_DS,/* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_PLTGOT16_LO_DS",/* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Marker reloc for TLS. */ |
| HOWTO (R_PPC64_TLS, |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_PPC64_TLS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Computes the load module index of the load module that contains the |
| definition of its TLS sym. */ |
| HOWTO (R_PPC64_DTPMOD64, |
| 0, /* rightshift */ |
| 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPMOD64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Computes a dtv-relative displacement, the difference between the value |
| of sym+add and the base address of the thread-local storage block that |
| contains the definition of sym, minus 0x8000. */ |
| HOWTO (R_PPC64_DTPREL64, |
| 0, /* rightshift */ |
| 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A 16 bit dtprel reloc. */ |
| HOWTO (R_PPC64_DTPREL16, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16, but no overflow. */ |
| HOWTO (R_PPC64_DTPREL16_LO, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16_LO, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_DTPREL16_HI, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16_HI, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_DTPREL16_HA, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16_HI, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_DTPREL16_HIGHER, |
| 32, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_HIGHER", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16_HIGHER, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_DTPREL16_HIGHERA, |
| 32, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_HIGHERA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16_HIGHER, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_DTPREL16_HIGHEST, |
| 48, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_HIGHEST", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16_HIGHEST, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_DTPREL16_HIGHESTA, |
| 48, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_HIGHESTA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16, but for insns with a DS field. */ |
| HOWTO (R_PPC64_DTPREL16_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like DTPREL16_DS, but no overflow. */ |
| HOWTO (R_PPC64_DTPREL16_LO_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_DTPREL16_LO_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Computes a tp-relative displacement, the difference between the value of |
| sym+add and the value of the thread pointer (r13). */ |
| HOWTO (R_PPC64_TPREL64, |
| 0, /* rightshift */ |
| 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL64", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A 16 bit tprel reloc. */ |
| HOWTO (R_PPC64_TPREL16, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16, but no overflow. */ |
| HOWTO (R_PPC64_TPREL16_LO, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16_LO, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_TPREL16_HI, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16_HI, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_TPREL16_HA, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16_HI, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_TPREL16_HIGHER, |
| 32, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_HIGHER", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16_HIGHER, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_TPREL16_HIGHERA, |
| 32, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_HIGHERA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16_HIGHER, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_TPREL16_HIGHEST, |
| 48, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_HIGHEST", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16_HIGHEST, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_TPREL16_HIGHESTA, |
| 48, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_HIGHESTA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16, but for insns with a DS field. */ |
| HOWTO (R_PPC64_TPREL16_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like TPREL16_DS, but no overflow. */ |
| HOWTO (R_PPC64_TPREL16_LO_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_TPREL16_LO_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset |
| to the first entry relative to the TOC base (r2). */ |
| HOWTO (R_PPC64_GOT_TLSGD16, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSGD16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TLSGD16, but no overflow. */ |
| HOWTO (R_PPC64_GOT_TLSGD16_LO, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSGD16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_GOT_TLSGD16_HI, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSGD16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_GOT_TLSGD16_HA, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSGD16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Allocates two contiguous entries in the GOT to hold a tls_index structure, |
| with values (sym+add)@dtpmod and zero, and computes the offset to the |
| first entry relative to the TOC base (r2). */ |
| HOWTO (R_PPC64_GOT_TLSLD16, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSLD16", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TLSLD16, but no overflow. */ |
| HOWTO (R_PPC64_GOT_TLSLD16_LO, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSLD16_LO", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_GOT_TLSLD16_HI, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSLD16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_GOT_TLSLD16_HA, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TLSLD16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes |
| the offset to the entry relative to the TOC base (r2). */ |
| HOWTO (R_PPC64_GOT_DTPREL16_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_DTPREL16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_DTPREL16_DS, but no overflow. */ |
| HOWTO (R_PPC64_GOT_DTPREL16_LO_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_DTPREL16_LO_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_DTPREL16_LO_DS, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_GOT_DTPREL16_HI, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_DTPREL16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_GOT_DTPREL16_HA, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_DTPREL16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the |
| offset to the entry relative to the TOC base (r2). */ |
| HOWTO (R_PPC64_GOT_TPREL16_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TPREL16_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TPREL16_DS, but no overflow. */ |
| HOWTO (R_PPC64_GOT_TPREL16_LO_DS, |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TPREL16_LO_DS", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xfffc, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TPREL16_LO_DS, but next higher group of 16 bits. */ |
| HOWTO (R_PPC64_GOT_TPREL16_HI, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TPREL16_HI", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */ |
| HOWTO (R_PPC64_GOT_TPREL16_HA, |
| 16, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| ppc64_elf_unhandled_reloc, /* special_function */ |
| "R_PPC64_GOT_TPREL16_HA", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* GNU extension to record C++ vtable hierarchy. */ |
| HOWTO (R_PPC64_GNU_VTINHERIT, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| NULL, /* special_function */ |
| "R_PPC64_GNU_VTINHERIT", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* GNU extension to record C++ vtable member usage. */ |
| HOWTO (R_PPC64_GNU_VTENTRY, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| NULL, /* special_function */ |
| "R_PPC64_GNU_VTENTRY", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| }; |
| |
| |
| /* Initialize the ppc64_elf_howto_table, so that linear accesses can |
| be done. */ |
| |
| static void |
| ppc_howto_init () |
| { |
| unsigned int i, type; |
| |
| for (i = 0; |
| i < sizeof (ppc64_elf_howto_raw) / sizeof (ppc64_elf_howto_raw[0]); |
| i++) |
| { |
| type = ppc64_elf_howto_raw[i].type; |
| BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table) |
| / sizeof (ppc64_elf_howto_table[0]))); |
| ppc64_elf_howto_table[type] = &ppc64_elf_howto_raw[i]; |
| } |
| } |
| |
| static reloc_howto_type * |
| ppc64_elf_reloc_type_lookup (abfd, code) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| bfd_reloc_code_real_type code; |
| { |
| enum elf_ppc64_reloc_type r = R_PPC64_NONE; |
| |
| if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| /* Initialize howto table if needed. */ |
| ppc_howto_init (); |
| |
| switch ((int) code) |
| { |
| default: |
| return (reloc_howto_type *) NULL; |
| |
| case BFD_RELOC_NONE: r = R_PPC64_NONE; |
| break; |
| case BFD_RELOC_32: r = R_PPC64_ADDR32; |
| break; |
| case BFD_RELOC_PPC_BA26: r = R_PPC64_ADDR24; |
| break; |
| case BFD_RELOC_16: r = R_PPC64_ADDR16; |
| break; |
| case BFD_RELOC_LO16: r = R_PPC64_ADDR16_LO; |
| break; |
| case BFD_RELOC_HI16: r = R_PPC64_ADDR16_HI; |
| break; |
| case BFD_RELOC_HI16_S: r = R_PPC64_ADDR16_HA; |
| break; |
| case BFD_RELOC_PPC_BA16: r = R_PPC64_ADDR14; |
| break; |
| case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC64_ADDR14_BRTAKEN; |
| break; |
| case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC64_ADDR14_BRNTAKEN; |
| break; |
| case BFD_RELOC_PPC_B26: r = R_PPC64_REL24; |
| break; |
| case BFD_RELOC_PPC_B16: r = R_PPC64_REL14; |
| break; |
| case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC64_REL14_BRTAKEN; |
| break; |
| case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC64_REL14_BRNTAKEN; |
| break; |
| case BFD_RELOC_16_GOTOFF: r = R_PPC64_GOT16; |
| break; |
| case BFD_RELOC_LO16_GOTOFF: r = R_PPC64_GOT16_LO; |
| break; |
| case BFD_RELOC_HI16_GOTOFF: r = R_PPC64_GOT16_HI; |
| break; |
| case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC64_GOT16_HA; |
| break; |
| case BFD_RELOC_PPC_COPY: r = R_PPC64_COPY; |
| break; |
| case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC64_GLOB_DAT; |
| break; |
| case BFD_RELOC_32_PCREL: r = R_PPC64_REL32; |
| break; |
| case BFD_RELOC_32_PLTOFF: r = R_PPC64_PLT32; |
| break; |
| case BFD_RELOC_32_PLT_PCREL: r = R_PPC64_PLTREL32; |
| break; |
| case BFD_RELOC_LO16_PLTOFF: r = R_PPC64_PLT16_LO; |
| break; |
| case BFD_RELOC_HI16_PLTOFF: r = R_PPC64_PLT16_HI; |
| break; |
| case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC64_PLT16_HA; |
| break; |
| case BFD_RELOC_16_BASEREL: r = R_PPC64_SECTOFF; |
| break; |
| case BFD_RELOC_LO16_BASEREL: r = R_PPC64_SECTOFF_LO; |
| break; |
| case BFD_RELOC_HI16_BASEREL: r = R_PPC64_SECTOFF_HI; |
| break; |
| case BFD_RELOC_HI16_S_BASEREL: r = R_PPC64_SECTOFF_HA; |
| break; |
| case BFD_RELOC_CTOR: r = R_PPC64_ADDR64; |
| break; |
| case BFD_RELOC_64: r = R_PPC64_ADDR64; |
| break; |
| case BFD_RELOC_PPC64_HIGHER: r = R_PPC64_ADDR16_HIGHER; |
| break; |
| case BFD_RELOC_PPC64_HIGHER_S: r = R_PPC64_ADDR16_HIGHERA; |
| break; |
| case BFD_RELOC_PPC64_HIGHEST: r = R_PPC64_ADDR16_HIGHEST; |
| break; |
| case BFD_RELOC_PPC64_HIGHEST_S: r = R_PPC64_ADDR16_HIGHESTA; |
| break; |
| case BFD_RELOC_64_PCREL: r = R_PPC64_REL64; |
| break; |
| case BFD_RELOC_64_PLTOFF: r = R_PPC64_PLT64; |
| break; |
| case BFD_RELOC_64_PLT_PCREL: r = R_PPC64_PLTREL64; |
| break; |
| case BFD_RELOC_PPC_TOC16: r = R_PPC64_TOC16; |
| break; |
| case BFD_RELOC_PPC64_TOC16_LO: r = R_PPC64_TOC16_LO; |
| break; |
| case BFD_RELOC_PPC64_TOC16_HI: r = R_PPC64_TOC16_HI; |
| break; |
| case BFD_RELOC_PPC64_TOC16_HA: r = R_PPC64_TOC16_HA; |
| break; |
| case BFD_RELOC_PPC64_TOC: r = R_PPC64_TOC; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16: r = R_PPC64_PLTGOT16; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16_LO: r = R_PPC64_PLTGOT16_LO; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16_HI: r = R_PPC64_PLTGOT16_HI; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16_HA: r = R_PPC64_PLTGOT16_HA; |
| break; |
| case BFD_RELOC_PPC64_ADDR16_DS: r = R_PPC64_ADDR16_DS; |
| break; |
| case BFD_RELOC_PPC64_ADDR16_LO_DS: r = R_PPC64_ADDR16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_GOT16_DS: r = R_PPC64_GOT16_DS; |
| break; |
| case BFD_RELOC_PPC64_GOT16_LO_DS: r = R_PPC64_GOT16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_PLT16_LO_DS: r = R_PPC64_PLT16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_SECTOFF_DS: r = R_PPC64_SECTOFF_DS; |
| break; |
| case BFD_RELOC_PPC64_SECTOFF_LO_DS: r = R_PPC64_SECTOFF_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_TOC16_DS: r = R_PPC64_TOC16_DS; |
| break; |
| case BFD_RELOC_PPC64_TOC16_LO_DS: r = R_PPC64_TOC16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16_DS: r = R_PPC64_PLTGOT16_DS; |
| break; |
| case BFD_RELOC_PPC64_PLTGOT16_LO_DS: r = R_PPC64_PLTGOT16_LO_DS; |
| break; |
| case BFD_RELOC_PPC_TLS: r = R_PPC64_TLS; |
| break; |
| case BFD_RELOC_PPC_DTPMOD: r = R_PPC64_DTPMOD64; |
| break; |
| case BFD_RELOC_PPC_TPREL16: r = R_PPC64_TPREL16; |
| break; |
| case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC64_TPREL16_LO; |
| break; |
| case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC64_TPREL16_HI; |
| break; |
| case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC64_TPREL16_HA; |
| break; |
| case BFD_RELOC_PPC_TPREL: r = R_PPC64_TPREL64; |
| break; |
| case BFD_RELOC_PPC_DTPREL16: r = R_PPC64_DTPREL16; |
| break; |
| case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC64_DTPREL16_LO; |
| break; |
| case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC64_DTPREL16_HI; |
| break; |
| case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC64_DTPREL16_HA; |
| break; |
| case BFD_RELOC_PPC_DTPREL: r = R_PPC64_DTPREL64; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC64_GOT_TLSGD16; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC64_GOT_TLSGD16_LO; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC64_GOT_TLSGD16_HI; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC64_GOT_TLSGD16_HA; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC64_GOT_TLSLD16; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC64_GOT_TLSLD16_LO; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC64_GOT_TLSLD16_HI; |
| break; |
| case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC64_GOT_TLSLD16_HA; |
| break; |
| case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC64_GOT_TPREL16_DS; |
| break; |
| case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC64_GOT_TPREL16_LO_DS; |
| break; |
| case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC64_GOT_TPREL16_HI; |
| break; |
| case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC64_GOT_TPREL16_HA; |
| break; |
| case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC64_GOT_DTPREL16_DS; |
| break; |
| case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC64_GOT_DTPREL16_LO_DS; |
| break; |
| case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC64_GOT_DTPREL16_HI; |
| break; |
| case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC64_GOT_DTPREL16_HA; |
| break; |
| case BFD_RELOC_PPC64_TPREL16_DS: r = R_PPC64_TPREL16_DS; |
| break; |
| case BFD_RELOC_PPC64_TPREL16_LO_DS: r = R_PPC64_TPREL16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_TPREL16_HIGHER: r = R_PPC64_TPREL16_HIGHER; |
| break; |
| case BFD_RELOC_PPC64_TPREL16_HIGHERA: r = R_PPC64_TPREL16_HIGHERA; |
| break; |
| case BFD_RELOC_PPC64_TPREL16_HIGHEST: r = R_PPC64_TPREL16_HIGHEST; |
| break; |
| case BFD_RELOC_PPC64_TPREL16_HIGHESTA: r = R_PPC64_TPREL16_HIGHESTA; |
| break; |
| case BFD_RELOC_PPC64_DTPREL16_DS: r = R_PPC64_DTPREL16_DS; |
| break; |
| case BFD_RELOC_PPC64_DTPREL16_LO_DS: r = R_PPC64_DTPREL16_LO_DS; |
| break; |
| case BFD_RELOC_PPC64_DTPREL16_HIGHER: r = R_PPC64_DTPREL16_HIGHER; |
| break; |
| case BFD_RELOC_PPC64_DTPREL16_HIGHERA: r = R_PPC64_DTPREL16_HIGHERA; |
| break; |
| case BFD_RELOC_PPC64_DTPREL16_HIGHEST: r = R_PPC64_DTPREL16_HIGHEST; |
| break; |
| case BFD_RELOC_PPC64_DTPREL16_HIGHESTA: r = R_PPC64_DTPREL16_HIGHESTA; |
| break; |
| case BFD_RELOC_VTABLE_INHERIT: r = R_PPC64_GNU_VTINHERIT; |
| break; |
| case BFD_RELOC_VTABLE_ENTRY: r = R_PPC64_GNU_VTENTRY; |
| break; |
| } |
| |
| return ppc64_elf_howto_table[(int) r]; |
| }; |
| |
| /* Set the howto pointer for a PowerPC ELF reloc. */ |
| |
| static void |
| ppc64_elf_info_to_howto (abfd, cache_ptr, dst) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| arelent *cache_ptr; |
| Elf_Internal_Rela *dst; |
| { |
| unsigned int type; |
| |
| /* Initialize howto table if needed. */ |
| if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| ppc_howto_init (); |
| |
| type = ELF64_R_TYPE (dst->r_info); |
| BFD_ASSERT (type < (sizeof (ppc64_elf_howto_table) |
| / sizeof (ppc64_elf_howto_table[0]))); |
| cache_ptr->howto = ppc64_elf_howto_table[type]; |
| } |
| |
| /* Handle the R_PPC64_ADDR16_HA and similar relocs. */ |
| |
| static bfd_reloc_status_type |
| ppc64_elf_ha_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR data; |
| asection *input_section; |
| bfd *output_bfd; |
| char **error_message; |
| { |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| /* Adjust the addend for sign extension of the low 16 bits. |
| We won't actually be using the low 16 bits, so trashing them |
| doesn't matter. */ |
| reloc_entry->addend += 0x8000; |
| return bfd_reloc_continue; |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_brtaken_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR data; |
| asection *input_section; |
| bfd *output_bfd; |
| char **error_message; |
| { |
| long insn; |
| enum elf_ppc64_reloc_type r_type; |
| bfd_size_type octets; |
| /* Disabled until we sort out how ld should choose 'y' vs 'at'. */ |
| bfd_boolean is_power4 = FALSE; |
| |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| octets = reloc_entry->address * bfd_octets_per_byte (abfd); |
| insn = bfd_get_32 (abfd, (bfd_byte *) data + octets); |
| insn &= ~(0x01 << 21); |
| r_type = (enum elf_ppc64_reloc_type) reloc_entry->howto->type; |
| if (r_type == R_PPC64_ADDR14_BRTAKEN |
| || r_type == R_PPC64_REL14_BRTAKEN) |
| insn |= 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ |
| |
| if (is_power4) |
| { |
| /* Set 'a' bit. This is 0b00010 in BO field for branch |
| on CR(BI) insns (BO == 001at or 011at), and 0b01000 |
| for branch on CTR insns (BO == 1a00t or 1a01t). */ |
| if ((insn & (0x14 << 21)) == (0x04 << 21)) |
| insn |= 0x02 << 21; |
| else if ((insn & (0x14 << 21)) == (0x10 << 21)) |
| insn |= 0x08 << 21; |
| else |
| return bfd_reloc_continue; |
| } |
| else |
| { |
| bfd_vma target = 0; |
| bfd_vma from; |
| |
| if (!bfd_is_com_section (symbol->section)) |
| target = symbol->value; |
| target += symbol->section->output_section->vma; |
| target += symbol->section->output_offset; |
| target += reloc_entry->addend; |
| |
| from = (reloc_entry->address |
| + input_section->output_offset |
| + input_section->output_section->vma); |
| |
| /* Invert 'y' bit if not the default. */ |
| if ((bfd_signed_vma) (target - from) < 0) |
| insn ^= 0x01 << 21; |
| } |
| bfd_put_32 (abfd, (bfd_vma) insn, (bfd_byte *) data + octets); |
| return bfd_reloc_continue; |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_sectoff_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR data; |
| asection *input_section; |
| bfd *output_bfd; |
| char **error_message; |
| { |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| /* Subtract the symbol section base address. */ |
| reloc_entry->addend -= symbol->section->output_section->vma; |
| return bfd_reloc_continue; |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_sectoff_ha_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR data; |
| asection *input_section; |
| bfd *output_bfd; |
| char **error_message; |
| { |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| /* Subtract the symbol section base address. */ |
| reloc_entry->addend -= symbol->section->output_section->vma; |
| |
| /* Adjust the addend for sign extension of the low 16 bits. */ |
| reloc_entry->addend += 0x8000; |
| return bfd_reloc_continue; |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_toc_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR data; |
| asection *input_section; |
| bfd *output_bfd; |
| char **error_message; |
| { |
| bfd_vma TOCstart; |
| |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| TOCstart = _bfd_get_gp_value (input_section->output_section->owner); |
| if (TOCstart == 0) |
| TOCstart = ppc64_elf_toc (input_section->output_section->owner); |
| |
| /* Subtract the TOC base address. */ |
| reloc_entry->addend -= TOCstart + TOC_BASE_OFF; |
| return bfd_reloc_continue; |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_toc_ha_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR data; |
| asection *input_section; |
| bfd *output_bfd; |
| char **error_message; |
| { |
| bfd_vma TOCstart; |
| |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| TOCstart = _bfd_get_gp_value (input_section->output_section->owner); |
| if (TOCstart == 0) |
| TOCstart = ppc64_elf_toc (input_section->output_section->owner); |
| |
| /* Subtract the TOC base address. */ |
| reloc_entry->addend -= TOCstart + TOC_BASE_OFF; |
| |
| /* Adjust the addend for sign extension of the low 16 bits. */ |
| reloc_entry->addend += 0x8000; |
| return bfd_reloc_continue; |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_toc64_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR data; |
| asection *input_section; |
| bfd *output_bfd; |
| char **error_message; |
| { |
| bfd_vma TOCstart; |
| bfd_size_type octets; |
| |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| TOCstart = _bfd_get_gp_value (input_section->output_section->owner); |
| if (TOCstart == 0) |
| TOCstart = ppc64_elf_toc (input_section->output_section->owner); |
| |
| octets = reloc_entry->address * bfd_octets_per_byte (abfd); |
| bfd_put_64 (abfd, TOCstart + TOC_BASE_OFF, (bfd_byte *) data + octets); |
| return bfd_reloc_ok; |
| } |
| |
| static bfd_reloc_status_type |
| ppc64_elf_unhandled_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR data; |
| asection *input_section; |
| bfd *output_bfd; |
| char **error_message; |
| { |
| /* If this is a relocatable link (output_bfd test tells us), just |
| call the generic function. Any adjustment will be done at final |
| link time. */ |
| if (output_bfd != NULL) |
| return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, error_message); |
| |
| if (error_message != NULL) |
| { |
| static char buf[60]; |
| sprintf (buf, "generic linker can't handle %s", |
| reloc_entry->howto->name); |
| *error_message = buf; |
| } |
| return bfd_reloc_dangerous; |
| } |
| |
| /* Fix bad default arch selected for a 64 bit input bfd when the |
| default is 32 bit. */ |
| |
| static bfd_boolean |
| ppc64_elf_object_p (abfd) |
| bfd *abfd; |
| { |
| if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 32) |
| { |
| Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd); |
| |
| if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS64) |
| { |
| /* Relies on arch after 32 bit default being 64 bit default. */ |
| abfd->arch_info = abfd->arch_info->next; |
| BFD_ASSERT (abfd->arch_info->bits_per_word == 64); |
| } |
| } |
| return TRUE; |
| } |
| |
| /* Merge backend specific data from an object file to the output |
| object file when linking. */ |
| |
| static bfd_boolean |
| ppc64_elf_merge_private_bfd_data (ibfd, obfd) |
| bfd *ibfd; |
| bfd *obfd; |
| { |
| /* Check if we have the same endianess. */ |
| if (ibfd->xvec->byteorder != obfd->xvec->byteorder |
| && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN |
| && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN) |
| { |
| const char *msg; |
| |
| if (bfd_big_endian (ibfd)) |
| msg = _("%s: compiled for a big endian system and target is little endian"); |
| else |
| msg = _("%s: compiled for a little endian system and target is big endian"); |
| |
| (*_bfd_error_handler) (msg, bfd_archive_filename (ibfd)); |
| |
| bfd_set_error (bfd_error_wrong_format); |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| struct _ppc64_elf_section_data |
| { |
| struct bfd_elf_section_data elf; |
| |
| /* An array with one entry for each opd function descriptor. */ |
| union |
| { |
| /* Points to the function code section for local opd entries. */ |
| asection **func_sec; |
| /* After editing .opd, adjust references to opd local syms. */ |
| long *adjust; |
| } opd; |
| |
| /* An array for toc sections, indexed by offset/8. |
| Specifies the relocation symbol index used at a given toc offset. */ |
| unsigned *t_symndx; |
| }; |
| |
| #define ppc64_elf_section_data(sec) \ |
| ((struct _ppc64_elf_section_data *) elf_section_data (sec)) |
| |
| static bfd_boolean |
| ppc64_elf_new_section_hook (abfd, sec) |
| bfd *abfd; |
| asection *sec; |
| { |
| struct _ppc64_elf_section_data *sdata; |
| bfd_size_type amt = sizeof (*sdata); |
| |
| sdata = (struct _ppc64_elf_section_data *) bfd_zalloc (abfd, amt); |
| if (sdata == NULL) |
| return FALSE; |
| sec->used_by_bfd = (PTR) sdata; |
| |
| return _bfd_elf_new_section_hook (abfd, sec); |
| } |
| |
| /* The following functions are specific to the ELF linker, while |
| functions above are used generally. Those named ppc64_elf_* are |
| called by the main ELF linker code. They appear in this file more |
| or less in the order in which they are called. eg. |
| ppc64_elf_check_relocs is called early in the link process, |
| ppc64_elf_finish_dynamic_sections is one of the last functions |
| called. |
| |
| PowerPC64-ELF uses a similar scheme to PowerPC64-XCOFF in that |
| functions have both a function code symbol and a function descriptor |
| symbol. A call to foo in a relocatable object file looks like: |
| |
| . .text |
| . x: |
| . bl .foo |
| . nop |
| |
| The function definition in another object file might be: |
| |
| . .section .opd |
| . foo: .quad .foo |
| . .quad .TOC.@tocbase |
| . .quad 0 |
| . |
| . .text |
| . .foo: blr |
| |
| When the linker resolves the call during a static link, the branch |
| unsurprisingly just goes to .foo and the .opd information is unused. |
| If the function definition is in a shared library, things are a little |
| different: The call goes via a plt call stub, the opd information gets |
| copied to the plt, and the linker patches the nop. |
| |
| . x: |
| . bl .foo_stub |
| . ld 2,40(1) |
| . |
| . |
| . .foo_stub: |
| . addis 12,2,Lfoo@toc@ha # in practice, the call stub |
| . addi 12,12,Lfoo@toc@l # is slightly optimized, but |
| . std 2,40(1) # this is the general idea |
| . ld 11,0(12) |
| . ld 2,8(12) |
| . mtctr 11 |
| . ld 11,16(12) |
| . bctr |
| . |
| . .section .plt |
| . Lfoo: reloc (R_PPC64_JMP_SLOT, foo) |
| |
| The "reloc ()" notation is supposed to indicate that the linker emits |
| an R_PPC64_JMP_SLOT reloc against foo. The dynamic linker does the opd |
| copying. |
| |
| What are the difficulties here? Well, firstly, the relocations |
| examined by the linker in check_relocs are against the function code |
| sym .foo, while the dynamic relocation in the plt is emitted against |
| the function descriptor symbol, foo. Somewhere along the line, we need |
| to carefully copy dynamic link information from one symbol to the other. |
| Secondly, the generic part of the elf linker will make .foo a dynamic |
| symbol as is normal for most other backends. We need foo dynamic |
| instead, at least for an application final link. However, when |
| creating a shared library containing foo, we need to have both symbols |
| dynamic so that references to .foo are satisfied during the early |
| stages of linking. Otherwise the linker might decide to pull in a |
| definition from some other object, eg. a static library. */ |
| |
| /* The linker needs to keep track of the number of relocs that it |
| decides to copy as dynamic relocs in check_relocs for each symbol. |
| This is so that it can later discard them if they are found to be |
| unnecessary. We store the information in a field extending the |
| regular ELF linker hash table. */ |
| |
| struct ppc_dyn_relocs |
| { |
| struct ppc_dyn_relocs *next; |
| |
| /* The input section of the reloc. */ |
| asection *sec; |
| |
| /* Total number of relocs copied for the input section. */ |
| bfd_size_type count; |
| |
| /* Number of pc-relative relocs copied for the input section. */ |
| bfd_size_type pc_count; |
| }; |
| |
| /* Track GOT entries needed for a given symbol. We might need more |
| than one got entry per symbol. */ |
| struct got_entry |
| { |
| struct got_entry *next; |
| |
| /* The symbol addend that we'll be placing in the GOT. */ |
| bfd_vma addend; |
| |
| /* Reference count until size_dynamic_sections, GOT offset thereafter. */ |
| union |
| { |
| bfd_signed_vma refcount; |
| bfd_vma offset; |
| } got; |
| |
| /* Zero for non-tls entries, or TLS_TLS and one of TLS_GD, TLS_LD, |
| TLS_TPREL or TLS_DTPREL for tls entries. */ |
| char tls_type; |
| }; |
| |
| /* The same for PLT. */ |
| struct plt_entry |
| { |
| struct plt_entry *next; |
| |
| bfd_vma addend; |
| |
| union |
| { |
| bfd_signed_vma refcount; |
| bfd_vma offset; |
| } plt; |
| }; |
| |
| /* Of those relocs that might be copied as dynamic relocs, this macro |
| selects those that must be copied when linking a shared library, |
| even when the symbol is local. */ |
| |
| #define MUST_BE_DYN_RELOC(RTYPE) \ |
| ((RTYPE) != R_PPC64_REL32 \ |
| && (RTYPE) != R_PPC64_REL64 \ |
| && (RTYPE) != R_PPC64_REL30) |
| |
| /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
| copying dynamic variables from a shared lib into an app's dynbss |
| section, and instead use a dynamic relocation to point into the |
| shared lib. */ |
| #define ELIMINATE_COPY_RELOCS 1 |
| |
| /* Section name for stubs is the associated section name plus this |
| string. */ |
| #define STUB_SUFFIX ".stub" |
| |
| /* Linker stubs. |
| ppc_stub_long_branch: |
| Used when a 14 bit branch (or even a 24 bit branch) can't reach its |
| destination, but a 24 bit branch in a stub section will reach. |
| . b dest |
| |
| ppc_stub_plt_branch: |
| Similar to the above, but a 24 bit branch in the stub section won't |
| reach its destination. |
| . addis %r12,%r2,xxx@toc@ha |
| . ld %r11,xxx@toc@l(%r12) |
| . mtctr %r11 |
| . bctr |
| |
| ppc_stub_plt_call: |
| Used to call a function in a shared library. |
| . addis %r12,%r2,xxx@toc@ha |
| . std %r2,40(%r1) |
| . ld %r11,xxx+0@toc@l(%r12) |
| . ld %r2,xxx+8@toc@l(%r12) |
| . mtctr %r11 |
| . ld %r11,xxx+16@toc@l(%r12) |
| . bctr |
| |
| ppc_stub_long_branch and ppc_stub_plt_branch may also have additional |
| code to adjust the value and save r2 to support multiple toc sections. |
| A ppc_stub_long_branch with an r2 offset looks like: |
| . std %r2,40(%r1) |
| . addis %r2,%r2,off@ha |
| . addi %r2,%r2,off@l |
| . b dest |
| |
| A ppc_stub_plt_branch with an r2 offset looks like: |
| . std %r2,40(%r1) |
| . addis %r12,%r2,xxx@toc@ha |
| . ld %r11,xxx@toc@l(%r12) |
| . addis %r2,%r2,off@ha |
| . addi %r2,%r2,off@l |
| . mtctr %r11 |
| . bctr |
| */ |
| |
| enum ppc_stub_type { |
| ppc_stub_none, |
| ppc_stub_long_branch, |
| ppc_stub_long_branch_r2off, |
| ppc_stub_plt_branch, |
| ppc_stub_plt_branch_r2off, |
| ppc_stub_plt_call |
| }; |
| |
| struct ppc_stub_hash_entry { |
| |
| /* Base hash table entry structure. */ |
| struct bfd_hash_entry root; |
| |
| enum ppc_stub_type stub_type; |
| |
| /* The stub section. */ |
| asection *stub_sec; |
| |
| /* Offset within stub_sec of the beginning of this stub. */ |
| bfd_vma stub_offset; |
| |
| /* Given the symbol's value and its section we can determine its final |
| value when building the stubs (so the stub knows where to jump. */ |
| bfd_vma target_value; |
| asection *target_section; |
| |
| /* The symbol table entry, if any, that this was derived from. */ |
| struct ppc_link_hash_entry *h; |
| |
| /* And the reloc addend that this was derived from. */ |
| bfd_vma addend; |
| |
| /* Where this stub is being called from, or, in the case of combined |
| stub sections, the first input section in the group. */ |
| asection *id_sec; |
| }; |
| |
| struct ppc_branch_hash_entry { |
| |
| /* Base hash table entry structure. */ |
| struct bfd_hash_entry root; |
| |
| /* Offset within .branch_lt. */ |
| unsigned int offset; |
| |
| /* Generation marker. */ |
| unsigned int iter; |
| }; |
| |
| struct ppc_link_hash_entry |
| { |
| struct elf_link_hash_entry elf; |
| |
| /* A pointer to the most recently used stub hash entry against this |
| symbol. */ |
| struct ppc_stub_hash_entry *stub_cache; |
| |
| /* Track dynamic relocs copied for this symbol. */ |
| struct ppc_dyn_relocs *dyn_relocs; |
| |
| /* Link between function code and descriptor symbols. */ |
| struct elf_link_hash_entry *oh; |
| |
| /* Flag function code and descriptor symbols. */ |
| unsigned int is_func:1; |
| unsigned int is_func_descriptor:1; |
| unsigned int is_entry:1; |
| |
| /* Contexts in which symbol is used in the GOT (or TOC). |
| TLS_GD .. TLS_EXPLICIT bits are or'd into the mask as the |
| corresponding relocs are encountered during check_relocs. |
| tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to |
| indicate the corresponding GOT entry type is not needed. |
| tls_optimize may also set TLS_TPRELGD when a GD reloc turns into |
| a TPREL one. We use a separate flag rather than setting TPREL |
| just for convenience in distinguishing the two cases. */ |
| #define TLS_GD 1 /* GD reloc. */ |
| #define TLS_LD 2 /* LD reloc. */ |
| #define TLS_TPREL 4 /* TPREL reloc, => IE. */ |
| #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */ |
| #define TLS_TLS 16 /* Any TLS reloc. */ |
| #define TLS_EXPLICIT 32 /* Marks TOC section TLS relocs. */ |
| #define TLS_TPRELGD 64 /* TPREL reloc resulting from GD->IE. */ |
| char tls_mask; |
| }; |
| |
| /* ppc64 ELF linker hash table. */ |
| |
| struct ppc_link_hash_table |
| { |
| struct elf_link_hash_table elf; |
| |
| /* The stub hash table. */ |
| struct bfd_hash_table stub_hash_table; |
| |
| /* Another hash table for plt_branch stubs. */ |
| struct bfd_hash_table branch_hash_table; |
| |
| /* Linker stub bfd. */ |
| bfd *stub_bfd; |
| |
| /* Linker call-backs. */ |
| asection * (*add_stub_section) PARAMS ((const char *, asection *)); |
| void (*layout_sections_again) PARAMS ((void)); |
| |
| /* Array to keep track of which stub sections have been created, and |
| information on stub grouping. */ |
| struct map_stub { |
| /* This is the section to which stubs in the group will be attached. */ |
| asection *link_sec; |
| /* The stub section. */ |
| asection *stub_sec; |
| /* Along with elf_gp, specifies the TOC pointer used in this group. */ |
| bfd_vma toc_off; |
| } *stub_group; |
| |
| /* Support for multiple toc sections. */ |
| unsigned int no_multi_toc; |
| unsigned int multi_toc_needed; |
| |
| /* Temp used when calculating TOC pointers. */ |
| bfd_vma toc_curr; |
| |
| /* Assorted information used by ppc64_elf_size_stubs. */ |
| int top_index; |
| asection **input_list; |
| |
| /* Short-cuts to get to dynamic linker sections. */ |
| asection *sgot; |
| asection *srelgot; |
| asection *splt; |
| asection *srelplt; |
| asection *sdynbss; |
| asection *srelbss; |
| asection *sglink; |
| asection *sfpr; |
| asection *sbrlt; |
| asection *srelbrlt; |
| |
| /* Short-cut to first output tls section. */ |
| asection *tls_sec; |
| |
| /* Shortcut to .__tls_get_addr. */ |
| struct elf_link_hash_entry *tls_get_addr; |
| |
| /* TLS local dynamic got entry handling. */ |
| union { |
| bfd_signed_vma refcount; |
| bfd_vma offset; |
| } tlsld_got; |
| |
| /* Set if we should emit symbols for stubs. */ |
| unsigned int emit_stub_syms; |
| |
| /* Set on error. */ |
| unsigned int stub_error; |
| |
| /* Flag set when small branches are detected. Used to |
| select suitable defaults for the stub group size. */ |
| unsigned int has_14bit_branch; |
| |
| /* Set if we detect a reference undefined weak symbol. */ |
| unsigned int have_undefweak; |
| |
| /* Incremented every time we size stubs. */ |
| unsigned int stub_iteration; |
| |
| /* Small local sym to section mapping cache. */ |
| struct sym_sec_cache sym_sec; |
| }; |
| |
| static struct bfd_hash_entry *stub_hash_newfunc |
| PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| static struct bfd_hash_entry *branch_hash_newfunc |
| PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| static struct bfd_hash_entry *link_hash_newfunc |
| PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
| static struct bfd_link_hash_table *ppc64_elf_link_hash_table_create |
| PARAMS ((bfd *)); |
| static void ppc64_elf_link_hash_table_free |
| PARAMS ((struct bfd_link_hash_table *)); |
| static char *ppc_stub_name |
| PARAMS ((const asection *, const asection *, |
| const struct ppc_link_hash_entry *, const Elf_Internal_Rela *)); |
| static struct ppc_stub_hash_entry *ppc_get_stub_entry |
| PARAMS ((const asection *, const asection *, struct elf_link_hash_entry *, |
| const Elf_Internal_Rela *, struct ppc_link_hash_table *)); |
| static struct ppc_stub_hash_entry *ppc_add_stub |
| PARAMS ((const char *, asection *, struct ppc_link_hash_table *)); |
| static bfd_boolean create_linkage_sections |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| static bfd_boolean create_got_section |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| static bfd_boolean ppc64_elf_create_dynamic_sections |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| static void ppc64_elf_copy_indirect_symbol |
| PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *, |
| struct elf_link_hash_entry *)); |
| static bfd_boolean update_local_sym_info |
| PARAMS ((bfd *, Elf_Internal_Shdr *, unsigned long, bfd_vma, int)); |
| static bfd_boolean update_plt_info |
| PARAMS ((bfd *, struct ppc_link_hash_entry *, bfd_vma)); |
| static bfd_boolean ppc64_elf_check_relocs |
| PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| const Elf_Internal_Rela *)); |
| static asection * ppc64_elf_gc_mark_hook |
| PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
| struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
| static bfd_boolean ppc64_elf_gc_sweep_hook |
| PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| const Elf_Internal_Rela *)); |
| static bfd_boolean func_desc_adjust |
| PARAMS ((struct elf_link_hash_entry *, PTR)); |
| static bfd_boolean ppc64_elf_func_desc_adjust |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| static bfd_boolean ppc64_elf_adjust_dynamic_symbol |
| PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| static void ppc64_elf_hide_symbol |
| PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean)); |
| static bfd_boolean get_sym_h |
| PARAMS ((struct elf_link_hash_entry **, Elf_Internal_Sym **, asection **, |
| char **, Elf_Internal_Sym **, unsigned long, bfd *)); |
| static int get_tls_mask |
| PARAMS ((char **, Elf_Internal_Sym **, const Elf_Internal_Rela *, bfd *)); |
| static bfd_boolean allocate_dynrelocs |
| PARAMS ((struct elf_link_hash_entry *, PTR)); |
| static bfd_boolean readonly_dynrelocs |
| PARAMS ((struct elf_link_hash_entry *, PTR)); |
| static enum elf_reloc_type_class ppc64_elf_reloc_type_class |
| PARAMS ((const Elf_Internal_Rela *)); |
| static bfd_boolean ppc64_elf_size_dynamic_sections |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| static enum ppc_stub_type ppc_type_of_stub |
| PARAMS ((asection *, const Elf_Internal_Rela *, |
| struct ppc_link_hash_entry **, bfd_vma)); |
| static bfd_byte *build_plt_stub |
| PARAMS ((bfd *, bfd_byte *, int)); |
| static bfd_boolean ppc_build_one_stub |
| PARAMS ((struct bfd_hash_entry *, PTR)); |
| static bfd_boolean ppc_size_one_stub |
| PARAMS ((struct bfd_hash_entry *, PTR)); |
| static void group_sections |
| PARAMS ((struct ppc_link_hash_table *, bfd_size_type, bfd_boolean)); |
| static bfd_boolean ppc64_elf_relocate_section |
| PARAMS ((bfd *, struct bfd_link_info *info, bfd *, asection *, bfd_byte *, |
| Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms, |
| asection **)); |
| static bfd_boolean ppc64_elf_finish_dynamic_symbol |
| PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
| Elf_Internal_Sym *)); |
| static bfd_boolean ppc64_elf_finish_dynamic_sections |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| |
| /* Get the ppc64 ELF linker hash table from a link_info structure. */ |
| |
| #define ppc_hash_table(p) \ |
| ((struct ppc_link_hash_table *) ((p)->hash)) |
| |
| #define ppc_stub_hash_lookup(table, string, create, copy) \ |
| ((struct ppc_stub_hash_entry *) \ |
| bfd_hash_lookup ((table), (string), (create), (copy))) |
| |
| #define ppc_branch_hash_lookup(table, string, create, copy) \ |
| ((struct ppc_branch_hash_entry *) \ |
| bfd_hash_lookup ((table), (string), (create), (copy))) |
| |
| /* Create an entry in the stub hash table. */ |
| |
| static struct bfd_hash_entry * |
| stub_hash_newfunc (entry, table, string) |
| struct bfd_hash_entry *entry; |
| struct bfd_hash_table *table; |
| const char *string; |
| { |
| /* Allocate the structure if it has not already been allocated by a |
| subclass. */ |
| if (entry == NULL) |
| { |
| entry = bfd_hash_allocate (table, sizeof (struct ppc_stub_hash_entry)); |
| if (entry == NULL) |
| return entry; |
| } |
| |
| /* Call the allocation method of the superclass. */ |
| entry = bfd_hash_newfunc (entry, table, string); |
| if (entry != NULL) |
| { |
| struct ppc_stub_hash_entry *eh; |
| |
| /* Initialize the local fields. */ |
| eh = (struct ppc_stub_hash_entry *) entry; |
| eh->stub_type = ppc_stub_none; |
| eh->stub_sec = NULL; |
| eh->stub_offset = 0; |
| eh->target_value = 0; |
| eh->target_section = NULL; |
| eh->h = NULL; |
| eh->id_sec = NULL; |
| } |
| |
| return entry; |
| } |
| |
| /* Create an entry in the branch hash table. */ |
| |
| static struct bfd_hash_entry * |
| branch_hash_newfunc (entry, table, string) |
| struct bfd_hash_entry *entry; |
| struct bfd_hash_table *table; |
| const char *string; |
| { |
| /* Allocate the structure if it has not already been allocated by a |
| subclass. */ |
| if (entry == NULL) |
| { |
| entry = bfd_hash_allocate (table, sizeof (struct ppc_branch_hash_entry)); |
| if (entry == NULL) |
| return entry; |
| } |
| |
| /* Call the allocation method of the superclass. */ |
| entry = bfd_hash_newfunc (entry, table, string); |
| if (entry != NULL) |
| { |
| struct ppc_branch_hash_entry *eh; |
| |
| /* Initialize the local fields. */ |
| eh = (struct ppc_branch_hash_entry *) entry; |
| eh->offset = 0; |
| eh->iter = 0; |
| } |
| |
| return entry; |
| } |
| |
| /* Create an entry in a ppc64 ELF linker hash table. */ |
| |
| static struct bfd_hash_entry * |
| link_hash_newfunc (entry, table, string) |
| struct bfd_hash_entry *entry; |
| struct bfd_hash_table *table; |
| const char *string; |
| { |
| /* Allocate the structure if it has not already been allocated by a |
| subclass. */ |
| if (entry == NULL) |
| { |
| entry = bfd_hash_allocate (table, sizeof (struct ppc_link_hash_entry)); |
| if (entry == NULL) |
| return entry; |
| } |
| |
| /* Call the allocation method of the superclass. */ |
| entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
| if (entry != NULL) |
| { |
| struct ppc_link_hash_entry *eh = (struct ppc_link_hash_entry *) entry; |
| |
| eh->stub_cache = NULL; |
| eh->dyn_relocs = NULL; |
| eh->oh = NULL; |
| eh->is_func = 0; |
| eh->is_func_descriptor = 0; |
| eh->is_entry = 0; |
| eh->tls_mask = 0; |
| } |
| |
| return entry; |
| } |
| |
| /* Create a ppc64 ELF linker hash table. */ |
| |
| static struct bfd_link_hash_table * |
| ppc64_elf_link_hash_table_create (abfd) |
| bfd *abfd; |
| { |
| struct ppc_link_hash_table *htab; |
| bfd_size_type amt = sizeof (struct ppc_link_hash_table); |
| |
| htab = (struct ppc_link_hash_table *) bfd_malloc (amt); |
| if (htab == NULL) |
| return NULL; |
| |
| if (! _bfd_elf_link_hash_table_init (&htab->elf, abfd, link_hash_newfunc)) |
| { |
| free (htab); |
| return NULL; |
| } |
| |
| /* Init the stub hash table too. */ |
| if (!bfd_hash_table_init (&htab->stub_hash_table, stub_hash_newfunc)) |
| return NULL; |
| |
| /* And the branch hash table. */ |
| if (!bfd_hash_table_init (&htab->branch_hash_table, branch_hash_newfunc)) |
| return NULL; |
| |
| htab->stub_bfd = NULL; |
| htab->add_stub_section = NULL; |
| htab->layout_sections_again = NULL; |
| htab->stub_group = NULL; |
| htab->no_multi_toc = 0; |
| htab->multi_toc_needed = 0; |
| htab->toc_curr = 0; |
| htab->sgot = NULL; |
| htab->srelgot = NULL; |
| htab->splt = NULL; |
| htab->srelplt = NULL; |
| htab->sdynbss = NULL; |
| htab->srelbss = NULL; |
| htab->sglink = NULL; |
| htab->sfpr = NULL; |
| htab->sbrlt = NULL; |
| htab->srelbrlt = NULL; |
| htab->tls_sec = NULL; |
| htab->tls_get_addr = NULL; |
| htab->tlsld_got.refcount = 0; |
| htab->emit_stub_syms = 0; |
| htab->stub_error = 0; |
| htab->has_14bit_branch = 0; |
| htab->have_undefweak = 0; |
| htab->stub_iteration = 0; |
| htab->sym_sec.abfd = NULL; |
| /* Initializing two fields of the union is just cosmetic. We really |
| only care about glist, but when compiled on a 32-bit host the |
| bfd_vma fields are larger. Setting the bfd_vma to zero makes |
| debugger inspection of these fields look nicer. */ |
| htab->elf.init_refcount.refcount = 0; |
| htab->elf.init_refcount.glist = NULL; |
| htab->elf.init_offset.offset = 0; |
| htab->elf.init_offset.glist = NULL; |
| |
| return &htab->elf.root; |
| } |
| |
| /* Free the derived linker hash table. */ |
| |
| static void |
| ppc64_elf_link_hash_table_free (hash) |
| struct bfd_link_hash_table *hash; |
| { |
| struct ppc_link_hash_table *ret = (struct ppc_link_hash_table *) hash; |
| |
| bfd_hash_table_free (&ret->stub_hash_table); |
| bfd_hash_table_free (&ret->branch_hash_table); |
| _bfd_generic_link_hash_table_free (hash); |
| } |
| |
| /* Build a name for an entry in the stub hash table. */ |
| |
| static char * |
| ppc_stub_name (input_section, sym_sec, h, rel) |
| const asection *input_section; |
| const asection *sym_sec; |
| const struct ppc_link_hash_entry *h; |
| const Elf_Internal_Rela *rel; |
| { |
| char *stub_name; |
| bfd_size_type len; |
| |
| /* rel->r_addend is actually 64 bit, but who uses more than +/- 2^31 |
| offsets from a sym as a branch target? In fact, we could |
| probably assume the addend is always zero. */ |
| BFD_ASSERT (((int) rel->r_addend & 0xffffffff) == rel->r_addend); |
| |
| if (h) |
| { |
| len = 8 + 1 + strlen (h->elf.root.root.string) + 1 + 8 + 1; |
| stub_name = bfd_malloc (len); |
| if (stub_name != NULL) |
| { |
| sprintf (stub_name, "%08x_%s+%x", |
| input_section->id & 0xffffffff, |
| h->elf.root.root.string, |
| (int) rel->r_addend & 0xffffffff); |
| } |
| } |
| else |
| { |
| len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1; |
| stub_name = bfd_malloc (len); |
| if (stub_name != NULL) |
| { |
| sprintf (stub_name, "%08x_%x:%x+%x", |
| input_section->id & 0xffffffff, |
| sym_sec->id & 0xffffffff, |
| (int) ELF64_R_SYM (rel->r_info) & 0xffffffff, |
| (int) rel->r_addend & 0xffffffff); |
| } |
| } |
| return stub_name; |
| } |
| |
| /* Look up an entry in the stub hash. Stub entries are cached because |
| creating the stub name takes a bit of time. */ |
| |
| static struct ppc_stub_hash_entry * |
| ppc_get_stub_entry (input_section, sym_sec, hash, rel, htab) |
| const asection *input_section; |
| const asection *sym_sec; |
| struct elf_link_hash_entry *hash; |
| const Elf_Internal_Rela *rel; |
| struct ppc_link_hash_table *htab; |
| { |
| struct ppc_stub_hash_entry *stub_entry; |
| struct ppc_link_hash_entry *h = (struct ppc_link_hash_entry *) hash; |
| const asection *id_sec; |
| |
| /* If this input section is part of a group of sections sharing one |
| stub section, then use the id of the first section in the group. |
| Stub names need to include a section id, as there may well be |
| more than one stub used to reach say, printf, and we need to |
| distinguish between them. */ |
| id_sec = htab->stub_group[input_section->id].link_sec; |
| |
| if (h != NULL && h->stub_cache != NULL |
| && h->stub_cache->h == h |
| && h->stub_cache->id_sec == id_sec) |
| { |
| stub_entry = h->stub_cache; |
| } |
| else |
| { |
| char *stub_name; |
| |
| stub_name = ppc_stub_name (id_sec, sym_sec, h, rel); |
| if (stub_name == NULL) |
| return NULL; |
| |
| stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, |
| stub_name, FALSE, FALSE); |
| if (h != NULL) |
| h->stub_cache = stub_entry; |
| |
| free (stub_name); |
| } |
| |
| return stub_entry; |
| } |
| |
| /* Add a new stub entry to the stub hash. Not all fields of the new |
| stub entry are initialised. */ |
| |
| static struct ppc_stub_hash_entry * |
| ppc_add_stub (stub_name, section, htab) |
| const char *stub_name; |
| asection *section; |
| struct ppc_link_hash_table *htab; |
| { |
| asection *link_sec; |
| asection *stub_sec; |
| struct ppc_stub_hash_entry *stub_entry; |
| |
| link_sec = htab->stub_group[section->id].link_sec; |
| stub_sec = htab->stub_group[section->id].stub_sec; |
| if (stub_sec == NULL) |
| { |
| stub_sec = htab->stub_group[link_sec->id].stub_sec; |
| if (stub_sec == NULL) |
| { |
| size_t namelen; |
| bfd_size_type len; |
| char *s_name; |
| |
| namelen = strlen (link_sec->name); |
| len = namelen + sizeof (STUB_SUFFIX); |
| s_name = bfd_alloc (htab->stub_bfd, len); |
| if (s_name == NULL) |
| return NULL; |
| |
| memcpy (s_name, link_sec->name, namelen); |
| memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX)); |
| stub_sec = (*htab->add_stub_section) (s_name, link_sec); |
| if (stub_sec == NULL) |
| return NULL; |
| htab->stub_group[link_sec->id].stub_sec = stub_sec; |
| } |
| htab->stub_group[section->id].stub_sec = stub_sec; |
| } |
| |
| /* Enter this entry into the linker stub hash table. */ |
| stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, stub_name, |
| TRUE, FALSE); |
| if (stub_entry == NULL) |
| { |
| (*_bfd_error_handler) (_("%s: cannot create stub entry %s"), |
| bfd_archive_filename (section->owner), |
| stub_name); |
| return NULL; |
| } |
| |
| stub_entry->stub_sec = stub_sec; |
| stub_entry->stub_offset = 0; |
| stub_entry->id_sec = link_sec; |
| return stub_entry; |
| } |
| |
| /* Create sections for linker generated code. */ |
| |
| static bfd_boolean |
| create_linkage_sections (dynobj, info) |
| bfd *dynobj; |
| struct bfd_link_info *info; |
| { |
| struct ppc_link_hash_table *htab; |
| flagword flags; |
| |
| htab = ppc_hash_table (info); |
| |
| /* Create .sfpr for code to save and restore fp regs. */ |
| flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY |
| | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| htab->sfpr = bfd_make_section_anyway (dynobj, ".sfpr"); |
| if (htab->sfpr == NULL |
| || ! bfd_set_section_flags (dynobj, htab->sfpr, flags) |
| || ! bfd_set_section_alignment (dynobj, htab->sfpr, 2)) |
| return FALSE; |
| |
| /* Create .glink for lazy dynamic linking support. */ |
| htab->sglink = bfd_make_section_anyway (dynobj, ".glink"); |
| if (htab->sglink == NULL |
| || ! bfd_set_section_flags (dynobj, htab->sglink, flags) |
| || ! bfd_set_section_alignment (dynobj, htab->sglink, 2)) |
| return FALSE; |
| |
| /* Create .branch_lt for plt_branch stubs. */ |
| flags = (SEC_ALLOC | SEC_LOAD |
| | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| htab->sbrlt = bfd_make_section_anyway (dynobj, ".branch_lt"); |
| if (htab->sbrlt == NULL |
| || ! bfd_set_section_flags (dynobj, htab->sbrlt, flags) |
| || ! bfd_set_section_alignment (dynobj, htab->sbrlt, 3)) |
| return FALSE; |
| |
| if (info->shared) |
| { |
| flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
| | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| htab->srelbrlt = bfd_make_section_anyway (dynobj, ".rela.branch_lt"); |
| if (!htab->srelbrlt |
| || ! bfd_set_section_flags (dynobj, htab->srelbrlt, flags) |
| || ! bfd_set_section_alignment (dynobj, htab->srelbrlt, 3)) |
| return FALSE; |
| } |
| return TRUE; |
| } |
| |
| /* Create .got and .rela.got sections in DYNOBJ, and set up |
| shortcuts to them in our hash table. */ |
| |
| static bfd_boolean |
| create_got_section (dynobj, info) |
| bfd *dynobj; |
| struct bfd_link_info *info; |
| { |
| struct ppc_link_hash_table *htab; |
| |
| if (! _bfd_elf_create_got_section (dynobj, info)) |
| return FALSE; |
| |
| htab = ppc_hash_table (info); |
| htab->sgot = bfd_get_section_by_name (dynobj, ".got"); |
| if (!htab->sgot) |
| abort (); |
| |
| htab->srelgot = bfd_make_section (dynobj, ".rela.got"); |
| if (!htab->srelgot |
| || ! bfd_set_section_flags (dynobj, htab->srelgot, |
| (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| | SEC_IN_MEMORY | SEC_LINKER_CREATED |
| | SEC_READONLY)) |
| || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) |
| return FALSE; |
| return TRUE; |
| } |
| |
| /* Create the dynamic sections, and set up shortcuts. */ |
| |
| static bfd_boolean |
| ppc64_elf_create_dynamic_sections (dynobj, info) |
| bfd *dynobj; |
| struct bfd_link_info *info; |
| { |
| struct ppc_link_hash_table *htab; |
| |
| htab = ppc_hash_table (info); |
| if (!htab->sgot && !create_got_section (dynobj, info)) |
| return FALSE; |
| |
| if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
| return FALSE; |
| |
| htab->splt = bfd_get_section_by_name (dynobj, ".plt"); |
| htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); |
| if (!info->shared) |
| htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| |
| if (!htab->splt || !htab->srelplt || !htab->sdynbss |
| || (!info->shared && !htab->srelbss)) |
| abort (); |
| |
| return TRUE; |
| } |
| |
| /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
| |
| static void |
| ppc64_elf_copy_indirect_symbol (bed, dir, ind) |
| struct elf_backend_data *bed ATTRIBUTE_UNUSED; |
| struct elf_link_hash_entry *dir, *ind; |
| { |
| struct ppc_link_hash_entry *edir, *eind; |
| flagword mask; |
| |
| edir = (struct ppc_link_hash_entry *) dir; |
| eind = (struct ppc_link_hash_entry *) ind; |
| |
| /* Copy over any dynamic relocs we may have on the indirect sym. */ |
| if (eind->dyn_relocs != NULL) |
| { |
| if (edir->dyn_relocs != NULL) |
| { |
| struct ppc_dyn_relocs **pp; |
| struct ppc_dyn_relocs *p; |
| |
| if (eind->elf.root.type == bfd_link_hash_indirect) |
| abort (); |
| |
| /* Add reloc counts against the weak sym to the strong sym |
| list. Merge any entries against the same section. */ |
| for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) |
| { |
| struct ppc_dyn_relocs *q; |
| |
| for (q = edir->dyn_relocs; q != NULL; q = q->next) |
| if (q->sec == p->sec) |
| { |
| q->pc_count += p->pc_count; |
| q->count += p->count; |
| *pp = p->next; |
| break; |
| } |
| if (q == NULL) |
| pp = &p->next; |
| } |
| *pp = edir->dyn_relocs; |
| } |
| |
| edir->dyn_relocs = eind->dyn_relocs; |
| eind->dyn_relocs = NULL; |
| } |
| |
| edir->is_func |= eind->is_func; |
| edir->is_func_descriptor |= eind->is_func_descriptor; |
| edir->is_entry |= eind->is_entry; |
| edir->tls_mask |= eind->tls_mask; |
| |
| mask = (ELF_LINK_HASH_REF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR |
| | ELF_LINK_HASH_REF_REGULAR_NONWEAK | ELF_LINK_NON_GOT_REF); |
| /* If called to transfer flags for a weakdef during processing |
| of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF. |
| We clear it ourselves for ELIMINATE_COPY_RELOCS. */ |
| if (ELIMINATE_COPY_RELOCS |
| && eind->elf.root.type != bfd_link_hash_indirect |
| && (edir->elf.elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0) |
| mask &= ~ELF_LINK_NON_GOT_REF; |
| |
| edir->elf.elf_link_hash_flags |= eind->elf.elf_link_hash_flags & mask; |
| |
| /* If we were called to copy over info for a weak sym, that's all. */ |
| if (eind->elf.root.type != bfd_link_hash_indirect) |
| return; |
| |
| /* Copy over got entries that we may have already seen to the |
| symbol which just became indirect. */ |
| if (eind->elf.got.glist != NULL) |
| { |
| if (edir->elf.got.glist != NULL) |
| { |
| struct got_entry **entp; |
| struct got_entry *ent; |
| |
| for (entp = &eind->elf.got.glist; (ent = *entp) != NULL; ) |
| { |
| struct got_entry *dent; |
| |
| for (dent = edir->elf.got.glist; dent != NULL; dent = dent->next) |
| if (dent->addend == ent->addend |
| && dent->tls_type == ent->tls_type) |
| { |
| dent->got.refcount += ent->got.refcount; |
| *entp = ent->next; |
| break; |
| } |
| if (dent == NULL) |
| entp = &ent->next; |
| } |
| *entp = edir->elf.got.glist; |
| } |
| |
| edir->elf.got.glist = eind->elf.got.glist; |
| eind->elf.got.glist = NULL; |
| } |
| |
| /* And plt entries. */ |
| if (eind->elf.plt.plist != NULL) |
| { |
| if (edir->elf.plt.plist != NULL) |
| { |
| struct plt_entry **entp; |
| struct plt_entry *ent; |
| |
| for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; ) |
| { |
| struct plt_entry *dent; |
| |
| for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next) |
| if (dent->addend == ent->addend) |
| { |
| dent->plt.refcount += ent->plt.refcount; |
| *entp = ent->next; |
| break; |
| } |
| if (dent == NULL) |
| entp = &ent->next; |
| } |
| *entp = edir->elf.plt.plist; |
| } |
| |
| edir->elf.plt.plist = eind->elf.plt.plist; |
| eind->elf.plt.plist = NULL; |
| } |
| |
| if (edir->elf.dynindx == -1) |
| { |
| edir->elf.dynindx = eind->elf.dynindx; |
| edir->elf.dynstr_index = eind->elf.dynstr_index; |
| eind->elf.dynindx = -1; |
| eind->elf.dynstr_index = 0; |
| } |
| else |
| BFD_ASSERT (eind->elf.dynindx == -1); |
| } |
| |
| /* Set a flag, used by ppc64_elf_gc_mark_hook, on the entry symbol and |
| symbols undefined on the command-line. */ |
| |
| bfd_boolean |
| ppc64_elf_mark_entry_syms (info) |
| struct bfd_link_info *info; |
| { |
| struct ppc_link_hash_table *htab; |
| struct bfd_sym_chain *sym; |
| |
| htab = ppc_hash_table (info); |
| for (sym = info->gc_sym_list; sym; sym = sym->next) |
| { |
| struct elf_link_hash_entry *h; |
| |
| h = elf_link_hash_lookup (&htab->elf, sym->name, FALSE, FALSE, FALSE); |
| if (h != NULL) |
| ((struct ppc_link_hash_entry *) h)->is_entry = 1; |
| } |
| return TRUE; |
| } |
| |
| static bfd_boolean |
| update_local_sym_info (abfd, symtab_hdr, r_symndx, r_addend, tls_type) |
| bfd *abfd; |
| Elf_Internal_Shdr *symtab_hdr; |
| unsigned long r_symndx; |
| bfd_vma r_addend; |
| int tls_type; |
| { |
| struct got_entry **local_got_ents = elf_local_got_ents (abfd); |
| char *local_got_tls_masks; |
| |
| if (local_got_ents == NULL) |
| { |
| bfd_size_type size = symtab_hdr->sh_info; |
| |
| size *= sizeof (*local_got_ents) + sizeof (*local_got_tls_masks); |
| local_got_ents = (struct got_entry **) bfd_zalloc (abfd, size); |
| if (local_got_ents == NULL) |
| return FALSE; |
| elf_local_got_ents (abfd) = local_got_ents; |
| } |
| |
| if ((tls_type & TLS_EXPLICIT) == 0) |
| { |
| struct got_entry *ent; |
| |
| for (ent = local_got_ents[r_symndx]; ent != NULL; ent = ent->next) |
| if (ent->addend == r_addend && ent->tls_type == tls_type) |
| break; |
| if (ent == NULL) |
| { |
| bfd_size_type amt = sizeof (*ent); |
| ent = (struct got_entry *) bfd_alloc (abfd, amt); |
| if (ent == NULL) |
| return FALSE; |
| ent->next = local_got_ents[r_symndx]; |
| ent->addend = r_addend; |
| ent->tls_type = tls_type; |
| ent->got.refcount = 0; |
| local_got_ents[r_symndx] = ent; |
| } |
| ent->got.refcount += 1; |
| } |
| |
| local_got_tls_masks = (char *) (local_got_ents + symtab_hdr->sh_info); |
| local_got_tls_masks[r_symndx] |= tls_type; |
| return TRUE; |
| } |
| |
| static bfd_boolean |
| update_plt_info (abfd, eh, addend) |
| bfd *abfd; |
| struct ppc_link_hash_entry *eh; |
| bfd_vma addend; |
| { |
| struct plt_entry *ent; |
| |
| for (ent = eh->elf.plt.plist; ent != NULL; ent = ent->next) |
| if (ent->addend == addend) |
| break; |
| if (ent == NULL) |
| { |
| bfd_size_type amt = sizeof (*ent); |
| ent = (struct plt_entry *) bfd_alloc (abfd, amt); |
| if (ent == NULL) |
| return FALSE; |
| ent->next = eh->elf.plt.plist; |
| ent->addend = addend; |
| ent->plt.refcount = 0; |
| eh->elf.plt.plist = ent; |
| } |
| ent->plt.refcount += 1; |
| eh->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| eh->is_func = 1; |
| return TRUE; |
| } |
| |
| /* Look through the relocs for a section during the first phase, and |
| calculate needed space in the global offset table, procedure |
| linkage table, and dynamic reloc sections. */ |
| |
| static bfd_boolean |
| ppc64_elf_check_relocs (abfd, info, sec, relocs) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| asection *sec; |
| const Elf_Internal_Rela *relocs; |
| { |
| struct ppc_link_hash_table *htab; |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| const Elf_Internal_Rela *rel; |
| const Elf_Internal_Rela *rel_end; |
| asection *sreloc; |
| asection **opd_sym_map; |
| |
| if (info->relocateable) |
| return TRUE; |
| |
| htab = ppc_hash_table (info); |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| |
| sym_hashes = elf_sym_hashes (abfd); |
| sym_hashes_end = (sym_hashes |
| + symtab_hdr->sh_size / sizeof (Elf64_External_Sym) |
| - symtab_hdr->sh_info); |
| |
| sreloc = NULL; |
| opd_sym_map = NULL; |
| if (strcmp (bfd_get_section_name (abfd, sec), ".opd") == 0) |
| { |
| /* Garbage collection needs some extra help with .opd sections. |
| We don't want to necessarily keep everything referenced by |
| relocs in .opd, as that would keep all functions. Instead, |
| if we reference an .opd symbol (a function descriptor), we |
| want to keep the function code symbol's section. This is |
| easy for global symbols, but for local syms we need to keep |
| information about the associated function section. Later, if |
| edit_opd deletes entries, we'll use this array to adjust |
| local syms in .opd. */ |
| union opd_info { |
| asection *func_section; |
| long entry_adjust; |
| }; |
| bfd_size_type amt; |
| |
| amt = sec->_raw_size * sizeof (union opd_info) / 24; |
| opd_sym_map = (asection **) bfd_zalloc (abfd, amt); |
| if (opd_sym_map == NULL) |
| return FALSE; |
| ppc64_elf_section_data (sec)->opd.func_sec = opd_sym_map; |
| } |
| |
| if (htab->elf.dynobj == NULL) |
| htab->elf.dynobj = abfd; |
| if (htab->sfpr == NULL |
| && !create_linkage_sections (htab->elf.dynobj, info)) |
| return FALSE; |
| |
| rel_end = relocs + sec->reloc_count; |
| for (rel = relocs; rel < rel_end; rel++) |
| { |
| unsigned long r_symndx; |
| struct elf_link_hash_entry *h; |
| enum elf_ppc64_reloc_type r_type; |
| int tls_type = 0; |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| if (r_symndx < symtab_hdr->sh_info) |
| h = NULL; |
| else |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| |
| r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info); |
| switch (r_type) |
| { |
| case R_PPC64_GOT_TLSLD16: |
| case R_PPC64_GOT_TLSLD16_LO: |
| case R_PPC64_GOT_TLSLD16_HI: |
| case R_PPC64_GOT_TLSLD16_HA: |
| htab->tlsld_got.refcount += 1; |
| tls_type = TLS_TLS | TLS_LD; |
| goto dogottls; |
| |
| case R_PPC64_GOT_TLSGD16: |
| case R_PPC64_GOT_TLSGD16_LO: |
| case R_PPC64_GOT_TLSGD16_HI: |
| case R_PPC64_GOT_TLSGD16_HA: |
| tls_type = TLS_TLS | TLS_GD; |
| goto dogottls; |
| |
| case R_PPC64_GOT_TPREL16_DS: |
| case R_PPC64_GOT_TPREL16_LO_DS: |
| case R_PPC64_GOT_TPREL16_HI: |
| case R_PPC64_GOT_TPREL16_HA: |
| if (info->shared) |
| info->flags |= DF_STATIC_TLS; |
| tls_type = TLS_TLS | TLS_TPREL; |
| goto dogottls; |
| |
| case R_PPC64_GOT_DTPREL16_DS: |
| case R_PPC64_GOT_DTPREL16_LO_DS: |
| case R_PPC64_GOT_DTPREL16_HI: |
| case R_PPC64_GOT_DTPREL16_HA: |
| tls_type = TLS_TLS | TLS_DTPREL; |
| dogottls: |
| sec->has_tls_reloc = 1; |
| /* Fall thru */ |
| |
| case R_PPC64_GOT16: |
| case R_PPC64_GOT16_DS: |
| case R_PPC64_GOT16_HA: |
| case R_PPC64_GOT16_HI: |
| case R_PPC64_GOT16_LO: |
| case R_PPC64_GOT16_LO_DS: |
| /* This symbol requires a global offset table entry. */ |
| sec->has_gp_reloc = 1; |
| if (htab->sgot == NULL |
| && !create_got_section (htab->elf.dynobj, info)) |
| return FALSE; |
| |
| if (h != NULL) |
| { |
| struct ppc_link_hash_entry *eh; |
| struct got_entry *ent; |
| |
| eh = (struct ppc_link_hash_entry *) h; |
| for (ent = eh->elf.got.glist; ent != NULL; ent = ent->next) |
| if (ent->addend == rel->r_addend |
| && ent->tls_type == tls_type) |
| break; |
| if (ent == NULL) |
| { |
| bfd_size_type amt = sizeof (*ent); |
| ent = (struct got_entry *) bfd_alloc (abfd, amt); |
| if (ent == NULL) |
| return FALSE; |
| ent->next = eh->elf.got.glist; |
| ent->addend = rel->r_addend; |
| ent->tls_type = tls_type; |
| ent->got.refcount = 0; |
| eh->elf.got.glist = ent; |
| } |
| ent->got.refcount += 1; |
| eh->tls_mask |= tls_type; |
| } |
| else |
| /* This is a global offset table entry for a local symbol. */ |
| if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, |
| rel->r_addend, tls_type)) |
| return FALSE; |
| break; |
| |
| case R_PPC64_PLT16_HA: |
| case R_PPC64_PLT16_HI: |
| case R_PPC64_PLT16_LO: |
| case R_PPC64_PLT32: |
| case R_PPC64_PLT64: |
| /* This symbol requires a procedure linkage table entry. We |
| actually build the entry in adjust_dynamic_symbol, |
| because this might be a case of linking PIC code without |
| linking in any dynamic objects, in which case we don't |
| need to generate a procedure linkage table after all. */ |
| if (h == NULL) |
| { |
| /* It does not make sense to have a procedure linkage |
| table entry for a local symbol. */ |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| } |
| else |
| if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h, |
| rel->r_addend)) |
| return FALSE; |
| break; |
| |
| /* The following relocations don't need to propagate the |
| relocation if linking a shared object since they are |
| section relative. */ |
| case R_PPC64_SECTOFF: |
| case R_PPC64_SECTOFF_LO: |
| case R_PPC64_SECTOFF_HI: |
| case R_PPC64_SECTOFF_HA: |
| case R_PPC64_SECTOFF_DS: |
| case R_PPC64_SECTOFF_LO_DS: |
| case R_PPC64_DTPREL16: |
| case R_PPC64_DTPREL16_LO: |
| case R_PPC64_DTPREL16_HI: |
| case R_PPC64_DTPREL16_HA: |
| case R_PPC64_DTPREL16_DS: |
| case R_PPC64_DTPREL16_LO_DS: |
| case R_PPC64_DTPREL16_HIGHER: |
| case R_PPC64_DTPREL16_HIGHERA: |
| case R_PPC64_DTPREL16_HIGHEST: |
| case R_PPC64_DTPREL16_HIGHESTA: |
| break; |
| |
| /* Nor do these. */ |
| case R_PPC64_TOC16: |
| case R_PPC64_TOC16_LO: |
| case R_PPC64_TOC16_HI: |
| case R_PPC64_TOC16_HA: |
| case R_PPC64_TOC16_DS: |
| case R_PPC64_TOC16_LO_DS: |
| sec->has_gp_reloc = 1; |
| break; |
| |
| /* This relocation describes the C++ object vtable hierarchy. |
| Reconstruct it for later use during GC. */ |
| case R_PPC64_GNU_VTINHERIT: |
| if (!_bfd_elf64_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| return FALSE; |
| break; |
| |
| /* This relocation describes which C++ vtable entries are actually |
| used. Record for later use during GC. */ |
| case R_PPC64_GNU_VTENTRY: |
| if (!_bfd_elf64_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| return FALSE; |
| break; |
| |
| case R_PPC64_REL14: |
| case R_PPC64_REL14_BRTAKEN: |
| case R_PPC64_REL14_BRNTAKEN: |
| htab->has_14bit_branch = 1; |
| /* Fall through. */ |
| |
| case R_PPC64_REL24: |
| if (h != NULL |
| && h->root.root.string[0] == '.' |
| && h->root.root.string[1] != 0) |
| { |
| /* We may need a .plt entry if the function this reloc |
| refers to is in a shared lib. */ |
| if (!update_plt_info (abfd, (struct ppc_link_hash_entry *) h, |
| rel->r_addend)) |
| return FALSE; |
| if (h == htab->tls_get_addr) |
| sec->has_tls_reloc = 1; |
| else if ((strncmp (h->root.root.string, ".__tls_get_addr", 15) |
| == 0) |
| && (h->root.root.string[15] == 0 |
| || h->root.root.string[15] == '@')) |
| { |
| htab->tls_get_addr = h; |
| sec->has_tls_reloc = 1; |
| } |
| } |
| break; |
| |
| case R_PPC64_TPREL64: |
| tls_type = TLS_EXPLICIT | TLS_TLS | TLS_TPREL; |
| if (info->shared) |
| info->flags |= DF_STATIC_TLS; |
| goto dotlstoc; |
| |
| case R_PPC64_DTPMOD64: |
| if (rel + 1 < rel_end |
| && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) |
| && rel[1].r_offset == rel->r_offset + 8) |
| tls_type = TLS_EXPLICIT | TLS_TLS | TLS_GD; |
| else |
| tls_type = TLS_EXPLICIT | TLS_TLS | TLS_LD; |
| goto dotlstoc; |
| |
| case R_PPC64_DTPREL64: |
| tls_type = TLS_EXPLICIT | TLS_TLS | TLS_DTPREL; |
| if (rel != relocs |
| && rel[-1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPMOD64) |
| && rel[-1].r_offset == rel->r_offset - 8) |
| /* This is the second reloc of a dtpmod, dtprel pair. |
| Don't mark with TLS_DTPREL. */ |
| goto dodyn; |
| |
| dotlstoc: |
| sec->has_tls_reloc = 1; |
| if (h != NULL) |
| { |
| struct ppc_link_hash_entry *eh; |
| eh = (struct ppc_link_hash_entry *) h; |
| eh->tls_mask |= tls_type; |
| } |
| else |
| if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, |
| rel->r_addend, tls_type)) |
| return FALSE; |
| |
| if (ppc64_elf_section_data (sec)->t_symndx == NULL) |
| { |
| /* One extra to simplify get_tls_mask. */ |
| bfd_size_type amt = sec->_raw_size * sizeof (unsigned) / 8 + 1; |
| ppc64_elf_section_data (sec)->t_symndx |
| = (unsigned *) bfd_zalloc (abfd, amt); |
| if (ppc64_elf_section_data (sec)->t_symndx == NULL) |
| return FALSE; |
| } |
| BFD_ASSERT (rel->r_offset % 8 == 0); |
| ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8] = r_symndx; |
| |
| /* Mark the second slot of a GD or LD entry. |
| -1 to indicate GD and -2 to indicate LD. */ |
| if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_GD)) |
| ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -1; |
| else if (tls_type == (TLS_EXPLICIT | TLS_TLS | TLS_LD)) |
| ppc64_elf_section_data (sec)->t_symndx[rel->r_offset / 8 + 1] = -2; |
| goto dodyn; |
| |
| case R_PPC64_TPREL16: |
| case R_PPC64_TPREL16_LO: |
| case R_PPC64_TPREL16_HI: |
| case R_PPC64_TPREL16_HA: |
| case R_PPC64_TPREL16_DS: |
| case R_PPC64_TPREL16_LO_DS: |
| case R_PPC64_TPREL16_HIGHER: |
| case R_PPC64_TPREL16_HIGHERA: |
| case R_PPC64_TPREL16_HIGHEST: |
| case R_PPC64_TPREL16_HIGHESTA: |
| if (info->shared) |
| { |
| info->flags |= DF_STATIC_TLS; |
| goto dodyn; |
| } |
| break; |
| |
| case R_PPC64_ADDR64: |
| if (opd_sym_map != NULL |
| && h != NULL |
| && h->root.root.string[0] == '.' |
| && h->root.root.string[1] != 0) |
| { |
| struct elf_link_hash_entry *fdh; |
| |
| fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1, |
| FALSE, FALSE, FALSE); |
| if (fdh != NULL) |
| { |
| ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1; |
| ((struct ppc_link_hash_entry *) fdh)->oh = h; |
| ((struct ppc_link_hash_entry *) h)->is_func = 1; |
| ((struct ppc_link_hash_entry *) h)->oh = fdh; |
| } |
| } |
| if (opd_sym_map != NULL |
| && h == NULL |
| && rel + 1 < rel_end |
| && ((enum elf_ppc64_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info) |
| == R_PPC64_TOC)) |
| { |
| asection *s; |
| |
| s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec, |
| r_symndx); |
| if (s == NULL) |
| return FALSE; |
| else if (s != sec) |
| opd_sym_map[rel->r_offset / 24] = s; |
| } |
| /* Fall through. */ |
| |
| case R_PPC64_REL30: |
| case R_PPC64_REL32: |
| case R_PPC64_REL64: |
| case R_PPC64_ADDR14: |
| case R_PPC64_ADDR14_BRNTAKEN: |
| case R_PPC64_ADDR14_BRTAKEN: |
| case R_PPC64_ADDR16: |
| case R_PPC64_ADDR16_DS: |
| case R_PPC64_ADDR16_HA: |
| case R_PPC64_ADDR16_HI: |
| case R_PPC64_ADDR16_HIGHER: |
| case R_PPC64_ADDR16_HIGHERA: |
| case R_PPC64_ADDR16_HIGHEST: |
| case R_PPC64_ADDR16_HIGHESTA: |
| case R_PPC64_ADDR16_LO: |
| case R_PPC64_ADDR16_LO_DS: |
| case R_PPC64_ADDR24: |
| case R_PPC64_ADDR32: |
| case R_PPC64_UADDR16: |
| case R_PPC64_UADDR32: |
| case R_PPC64_UADDR64: |
| case R_PPC64_TOC: |
| if (h != NULL && !info->shared) |
| /* We may need a copy reloc. */ |
| h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; |
| |
| /* Don't propagate .opd relocs. */ |
| if (NO_OPD_RELOCS && opd_sym_map != NULL) |
| break; |
| |
| /* Don't propagate relocs that the dynamic linker won't relocate. */ |
| if ((sec->flags & SEC_ALLOC) == 0) |
| break; |
| |
| /* If we are creating a shared library, and this is a reloc |
| against a global symbol, or a non PC relative reloc |
| against a local symbol, then we need to copy the reloc |
| into the shared library. However, if we are linking with |
| -Bsymbolic, we do not need to copy a reloc against a |
| global symbol which is defined in an object we are |
| including in the link (i.e., DEF_REGULAR is set). At |
| this point we have not seen all the input files, so it is |
| possible that DEF_REGULAR is not set now but will be set |
| later (it is never cleared). In case of a weak definition, |
| DEF_REGULAR may be cleared later by a strong definition in |
| a shared library. We account for that possibility below by |
| storing information in the dyn_relocs field of the hash |
| table entry. A similar situation occurs when creating |
| shared libraries and symbol visibility changes render the |
| symbol local. |
| |
| If on the other hand, we are creating an executable, we |
| may need to keep relocations for symbols satisfied by a |
| dynamic library if we manage to avoid copy relocs for the |
| symbol. */ |
| dodyn: |
| if ((info->shared |
| && (MUST_BE_DYN_RELOC (r_type) |
| || (h != NULL |
| && (! info->symbolic |
| || h->root.type == bfd_link_hash_defweak |
| || (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0)))) |
| || (ELIMINATE_COPY_RELOCS |
| && !info->shared |
| && h != NULL |
| && (h->root.type == bfd_link_hash_defweak |
| || (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0))) |
| { |
| struct ppc_dyn_relocs *p; |
| struct ppc_dyn_relocs **head; |
| |
| /* We must copy these reloc types into the output file. |
| Create a reloc section in dynobj and make room for |
| this reloc. */ |
| if (sreloc == NULL) |
| { |
| const char *name; |
| bfd *dynobj; |
| |
| name = (bfd_elf_string_from_elf_section |
| (abfd, |
| elf_elfheader (abfd)->e_shstrndx, |
| elf_section_data (sec)->rel_hdr.sh_name)); |
| if (name == NULL) |
| return FALSE; |
| |
| if (strncmp (name, ".rela", 5) != 0 |
| || strcmp (bfd_get_section_name (abfd, sec), |
| name + 5) != 0) |
| { |
| (*_bfd_error_handler) |
| (_("%s: bad relocation section name `%s\'"), |
| bfd_archive_filename (abfd), name); |
| bfd_set_error (bfd_error_bad_value); |
| } |
| |
| dynobj = htab->elf.dynobj; |
| sreloc = bfd_get_section_by_name (dynobj, name); |
| if (sreloc == NULL) |
| { |
| flagword flags; |
| |
| sreloc = bfd_make_section (dynobj, name); |
| flags = (SEC_HAS_CONTENTS | SEC_READONLY |
| | SEC_IN_MEMORY | SEC_LINKER_CREATED); |
| if ((sec->flags & SEC_ALLOC) != 0) |
| flags |= SEC_ALLOC | SEC_LOAD; |
| if (sreloc == NULL |
| || ! bfd_set_section_flags (dynobj, sreloc, flags) |
| || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
| return FALSE; |
| } |
| elf_section_data (sec)->sreloc = sreloc; |
| } |
| |
| /* If this is a global symbol, we count the number of |
| relocations we need for this symbol. */ |
| if (h != NULL) |
| { |
| head = &((struct ppc_link_hash_entry *) h)->dyn_relocs; |
| } |
| else |
| { |
| /* Track dynamic relocs needed for local syms too. |
| We really need local syms available to do this |
| easily. Oh well. */ |
| |
| asection *s; |
| s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, |
| sec, r_symndx); |
| if (s == NULL) |
| return FALSE; |
| |
| head = ((struct ppc_dyn_relocs **) |
| &elf_section_data (s)->local_dynrel); |
| } |
| |
| p = *head; |
| if (p == NULL || p->sec != sec) |
| { |
| p = ((struct ppc_dyn_relocs *) |
| bfd_alloc (htab->elf.dynobj, |
| (bfd_size_type) sizeof *p)); |
| if (p == NULL) |
| return FALSE; |
| p->next = *head; |
| *head = p; |
| p->sec = sec; |
| p->count = 0; |
| p->pc_count = 0; |
| } |
| |
| p->count += 1; |
| if (!MUST_BE_DYN_RELOC (r_type)) |
| p->pc_count += 1; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| /* Return the section that should be marked against GC for a given |
| relocation. */ |
| |
| static asection * |
| ppc64_elf_gc_mark_hook (sec, info, rel, h, sym) |
| asection *sec; |
| struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| Elf_Internal_Rela *rel; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| { |
| asection *rsec = NULL; |
| |
| if (h != NULL) |
| { |
| enum elf_ppc64_reloc_type r_type; |
| struct ppc_link_hash_entry *fdh; |
| |
| r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info); |
| switch (r_type) |
| { |
| case R_PPC64_GNU_VTINHERIT: |
| case R_PPC64_GNU_VTENTRY: |
| break; |
| |
| default: |
| switch (h->root.type) |
| { |
| case bfd_link_hash_defined: |
| case bfd_link_hash_defweak: |
| fdh = (struct ppc_link_hash_entry *) h; |
| |
| /* Function descriptor syms cause the associated |
| function code sym section to be marked. */ |
| if (fdh->is_func_descriptor) |
| rsec = fdh->oh->root.u.def.section; |
| |
| /* Function entry syms return NULL if they are in .opd |
| and are not ._start (or others undefined on the ld |
| command line). Thus we avoid marking all function |
| sections, as all functions are referenced in .opd. */ |
| else if ((fdh->oh != NULL |
| && ((struct ppc_link_hash_entry *) fdh->oh)->is_entry) |
| || ppc64_elf_section_data (sec)->opd.func_sec == NULL) |
| rsec = h->root.u.def.section; |
| break; |
| |
| case bfd_link_hash_common: |
| rsec = h->root.u.c.p->section; |
| break; |
| |
| default: |
| break; |
| } |
| } |
| } |
| else |
| { |
| asection **opd_sym_section; |
| |
| rsec = bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| opd_sym_section = ppc64_elf_section_data (rsec)->opd.func_sec; |
| if (opd_sym_section != NULL) |
| rsec = opd_sym_section[sym->st_value / 24]; |
| else if (ppc64_elf_section_data (sec)->opd.func_sec != NULL) |
| rsec = NULL; |
| } |
| |
| return rsec; |
| } |
| |
| /* Update the .got, .plt. and dynamic reloc reference counts for the |
| section being removed. */ |
| |
| static bfd_boolean |
| ppc64_elf_gc_sweep_hook (abfd, info, sec, relocs) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| asection *sec; |
| const Elf_Internal_Rela *relocs; |
| { |
| struct ppc_link_hash_table *htab; |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes; |
| struct got_entry **local_got_ents; |
| const Elf_Internal_Rela *rel, *relend; |
| |
| elf_section_data (sec)->local_dynrel = NULL; |
| |
| htab = ppc_hash_table (info); |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (abfd); |
| local_got_ents = elf_local_got_ents (abfd); |
| |
| relend = relocs + sec->reloc_count; |
| for (rel = relocs; rel < relend; rel++) |
| { |
| unsigned long r_symndx; |
| enum elf_ppc64_reloc_type r_type; |
| struct elf_link_hash_entry *h = NULL; |
| char tls_type = 0; |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info); |
| if (r_symndx >= symtab_hdr->sh_info) |
| { |
| struct ppc_link_hash_entry *eh; |
| struct ppc_dyn_relocs **pp; |
| struct ppc_dyn_relocs *p; |
| |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| eh = (struct ppc_link_hash_entry *) h; |
| |
| for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
| if (p->sec == sec) |
| { |
| /* Everything must go for SEC. */ |
| *pp = p->next; |
| break; |
| } |
| } |
| |
| switch (r_type) |
| { |
| case R_PPC64_GOT_TLSLD16: |
| case R_PPC64_GOT_TLSLD16_LO: |
| case R_PPC64_GOT_TLSLD16_HI: |
| case R_PPC64_GOT_TLSLD16_HA: |
| htab->tlsld_got.refcount -= 1; |
| tls_type = TLS_TLS | TLS_LD; |
| goto dogot; |
| |
| case R_PPC64_GOT_TLSGD16: |
| case R_PPC64_GOT_TLSGD16_LO: |
| case R_PPC64_GOT_TLSGD16_HI: |
| case R_PPC64_GOT_TLSGD16_HA: |
| tls_type = TLS_TLS | TLS_GD; |
| goto dogot; |
| |
| case R_PPC64_GOT_TPREL16_DS: |
| case R_PPC64_GOT_TPREL16_LO_DS: |
| case R_PPC64_GOT_TPREL16_HI: |
| case R_PPC64_GOT_TPREL16_HA: |
| tls_type = TLS_TLS | TLS_TPREL; |
| goto dogot; |
| |
| case R_PPC64_GOT_DTPREL16_DS: |
| case R_PPC64_GOT_DTPREL16_LO_DS: |
| case R_PPC64_GOT_DTPREL16_HI: |
| case R_PPC64_GOT_DTPREL16_HA: |
| tls_type = TLS_TLS | TLS_DTPREL; |
| goto dogot; |
| |
| case R_PPC64_GOT16: |
| case R_PPC64_GOT16_DS: |
| case R_PPC64_GOT16_HA: |
| case R_PPC64_GOT16_HI: |
| case R_PPC64_GOT16_LO: |
| case R_PPC64_GOT16_LO_DS: |
| dogot: |
| { |
| struct got_entry *ent; |
| |
| if (h != NULL) |
| ent = h->got.glist; |
| else |
| ent = local_got_ents[r_symndx]; |
| |
| for (; ent != NULL; ent = ent->next) |
| if (ent->addend == rel->r_addend |
| && ent->tls_type == tls_type) |
| break; |
| if (ent == NULL) |
| abort (); |
| if (ent->got.refcount > 0) |
| ent->got.refcount -= 1; |
| } |
| break; |
| |
| case R_PPC64_PLT16_HA: |
| case R_PPC64_PLT16_HI: |
| case R_PPC64_PLT16_LO: |
| case R_PPC64_PLT32: |
| case R_PPC64_PLT64: |
| case R_PPC64_REL14: |
| case R_PPC64_REL14_BRNTAKEN: |
| case R_PPC64_REL14_BRTAKEN: |
| case R_PPC64_REL24: |
| if (h != NULL) |
| { |
| struct plt_entry *ent; |
| |
| for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| if (ent->addend == rel->r_addend) |
| break; |
| if (ent == NULL) |
| abort (); |
| if (ent->plt.refcount > 0) |
| ent->plt.refcount -= 1; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| } |
| return TRUE; |
| } |
| |
| /* Called via elf_link_hash_traverse to transfer dynamic linking |
| information on function code symbol entries to their corresponding |
| function descriptor symbol entries. */ |
| static bfd_boolean |
| func_desc_adjust (h, inf) |
| struct elf_link_hash_entry *h; |
| PTR inf; |
| { |
| struct bfd_link_info *info; |
| struct ppc_link_hash_table *htab; |
| struct plt_entry *ent; |
| |
| if (h->root.type == bfd_link_hash_indirect) |
| return TRUE; |
| |
| if (h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| info = (struct bfd_link_info *) inf; |
| htab = ppc_hash_table (info); |
| |
| /* If this is a function code symbol, transfer dynamic linking |
| information to the function descriptor symbol. */ |
| if (!((struct ppc_link_hash_entry *) h)->is_func) |
| return TRUE; |
| |
| if (h->root.type == bfd_link_hash_undefweak |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR)) |
| htab->have_undefweak = TRUE; |
| |
| for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| if (ent->plt.refcount > 0) |
| break; |
| if (ent != NULL |
| && h->root.root.string[0] == '.' |
| && h->root.root.string[1] != '\0') |
| { |
| struct elf_link_hash_entry *fdh = ((struct ppc_link_hash_entry *) h)->oh; |
| bfd_boolean force_local; |
| |
| /* Find the corresponding function descriptor symbol. Create it |
| as undefined if necessary. */ |
| |
| if (fdh == NULL) |
| fdh = elf_link_hash_lookup (&htab->elf, h->root.root.string + 1, |
| FALSE, FALSE, TRUE); |
| |
| if (fdh == NULL |
| && info->shared |
| && (h->root.type == bfd_link_hash_undefined |
| || h->root.type == bfd_link_hash_undefweak)) |
| { |
| bfd *abfd; |
| asymbol *newsym; |
| struct bfd_link_hash_entry *bh; |
| |
| abfd = h->root.u.undef.abfd; |
| newsym = bfd_make_empty_symbol (abfd); |
| newsym->name = h->root.root.string + 1; |
| newsym->section = bfd_und_section_ptr; |
| newsym->value = 0; |
| newsym->flags = BSF_OBJECT; |
| if (h->root.type == bfd_link_hash_undefweak) |
| newsym->flags |= BSF_WEAK; |
| |
| bh = &fdh->root; |
| if ( !(_bfd_generic_link_add_one_symbol |
| (info, abfd, newsym->name, newsym->flags, |
| newsym->section, newsym->value, NULL, FALSE, FALSE, &bh))) |
| { |
| return FALSE; |
| } |
| fdh = (struct elf_link_hash_entry *) bh; |
| fdh->elf_link_hash_flags &= ~ELF_LINK_NON_ELF; |
| } |
| |
| if (fdh != NULL |
| && (fdh->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0 |
| && (info->shared |
| || (fdh->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| || (fdh->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)) |
| { |
| if (fdh->dynindx == -1) |
| if (! bfd_elf64_link_record_dynamic_symbol (info, fdh)) |
| return FALSE; |
| fdh->elf_link_hash_flags |= (h->elf_link_hash_flags |
| & (ELF_LINK_HASH_REF_REGULAR |
| | ELF_LINK_HASH_REF_DYNAMIC |
| | ELF_LINK_HASH_REF_REGULAR_NONWEAK |
| | ELF_LINK_NON_GOT_REF)); |
| if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| { |
| fdh->plt.plist = h->plt.plist; |
| fdh->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| } |
| ((struct ppc_link_hash_entry *) fdh)->is_func_descriptor = 1; |
| ((struct ppc_link_hash_entry *) fdh)->oh = h; |
| ((struct ppc_link_hash_entry *) h)->oh = fdh; |
| } |
| |
| /* Now that the info is on the function descriptor, clear the |
| function code sym info. Any function code syms for which we |
| don't have a definition in a regular file, we force local. |
| This prevents a shared library from exporting syms that have |
| been imported from another library. Function code syms that |
| are really in the library we must leave global to prevent the |
| linker dragging in a definition from a static library. */ |
| force_local = (info->shared |
| && ((h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0 |
| || fdh == NULL |
| || (fdh->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0 |
| || (fdh->elf_link_hash_flags |
| & ELF_LINK_FORCED_LOCAL) != 0)); |
| _bfd_elf_link_hash_hide_symbol (info, h, force_local); |
| } |
| |
| return TRUE; |
| } |
| |
| #define MIN_SAVE_FPR 14 |
| #define MAX_SAVE_FPR 31 |
| |
| /* Called near the start of bfd_elf_size_dynamic_sections. We use |
| this hook to a) provide some gcc support functions, and b) transfer |
| dynamic linking information gathered so far on function code symbol |
| entries, to their corresponding function descriptor symbol entries. */ |
| static bfd_boolean |
| ppc64_elf_func_desc_adjust (obfd, info) |
| bfd *obfd ATTRIBUTE_UNUSED; |
| struct bfd_link_info *info; |
| { |
| struct ppc_link_hash_table *htab; |
| unsigned int lowest_savef = MAX_SAVE_FPR + 2; |
| unsigned int lowest_restf = MAX_SAVE_FPR + 2; |
| unsigned int i; |
| struct elf_link_hash_entry *h; |
| bfd_byte *p; |
| char sym[10]; |
| |
| htab = ppc_hash_table (info); |
| |
| if (htab->sfpr == NULL) |
| /* We don't have any relocs. */ |
| return TRUE; |
| |
| /* First provide any missing ._savef* and ._restf* functions. */ |
| memcpy (sym, "._savef14", 10); |
| for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++) |
| { |
| sym[7] = i / 10 + '0'; |
| sym[8] = i % 10 + '0'; |
| h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE); |
| if (h != NULL |
| && h->root.type == bfd_link_hash_undefined) |
| { |
| if (lowest_savef > i) |
| lowest_savef = i; |
| h->root.type = bfd_link_hash_defined; |
| h->root.u.def.section = htab->sfpr; |
| h->root.u.def.value = (i - lowest_savef) * 4; |
| h->type = STT_FUNC; |
| h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| _bfd_elf_link_hash_hide_symbol (info, h, info->shared); |
| } |
| } |
| |
| memcpy (sym, "._restf14", 10); |
| for (i = MIN_SAVE_FPR; i <= MAX_SAVE_FPR; i++) |
| { |
| sym[7] = i / 10 + '0'; |
| sym[8] = i % 10 + '0'; |
| h = elf_link_hash_lookup (&htab->elf, sym, FALSE, FALSE, TRUE); |
| if (h != NULL |
| && h->root.type == bfd_link_hash_undefined) |
| { |
| if (lowest_restf > i) |
| lowest_restf = i; |
| h->root.type = bfd_link_hash_defined; |
| h->root.u.def.section = htab->sfpr; |
| h->root.u.def.value = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4 |
| + (i - lowest_restf) * 4); |
| h->type = STT_FUNC; |
| h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR; |
| _bfd_elf_link_hash_hide_symbol (info, h, info->shared); |
| } |
| } |
| |
| elf_link_hash_traverse (&htab->elf, func_desc_adjust, (PTR) info); |
| |
| htab->sfpr->_raw_size = ((MAX_SAVE_FPR + 2 - lowest_savef) * 4 |
| + (MAX_SAVE_FPR + 2 - lowest_restf) * 4); |
| |
| if (htab->sfpr->_raw_size == 0) |
| { |
| if (!htab->have_undefweak) |
| { |
| _bfd_strip_section_from_output (info, htab->sfpr); |
| return TRUE; |
| } |
| |
| htab->sfpr->_raw_size = 4; |
| } |
| |
| p = (bfd_byte *) bfd_alloc (htab->elf.dynobj, htab->sfpr->_raw_size); |
| if (p == NULL) |
| return FALSE; |
| htab->sfpr->contents = p; |
| |
| for (i = lowest_savef; i <= MAX_SAVE_FPR; i++) |
| { |
| unsigned int fpr = i << 21; |
| unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8; |
| bfd_put_32 (htab->elf.dynobj, STFD_FR0_0R1 + fpr + stackoff, p); |
| p += 4; |
| } |
| if (lowest_savef <= MAX_SAVE_FPR) |
| { |
| bfd_put_32 (htab->elf.dynobj, BLR, p); |
| p += 4; |
| } |
| |
| for (i = lowest_restf; i <= MAX_SAVE_FPR; i++) |
| { |
| unsigned int fpr = i << 21; |
| unsigned int stackoff = (1 << 16) - (MAX_SAVE_FPR + 1 - i) * 8; |
| bfd_put_32 (htab->elf.dynobj, LFD_FR0_0R1 + fpr + stackoff, p); |
| p += 4; |
| } |
| if (lowest_restf <= MAX_SAVE_FPR |
| || htab->sfpr->_raw_size == 4) |
| { |
| bfd_put_32 (htab->elf.dynobj, BLR, p); |
| } |
| |
| return TRUE; |
| } |
| |
| /* Adjust a symbol defined by a dynamic object and referenced by a |
| regular object. The current definition is in some section of the |
| dynamic object, but we're not including those sections. We have to |
| change the definition to something the rest of the link can |
| understand. */ |
| |
| static bfd_boolean |
| ppc64_elf_adjust_dynamic_symbol (info, h) |
| struct bfd_link_info *info; |
| struct elf_link_hash_entry *h; |
| { |
| struct ppc_link_hash_table *htab; |
| asection *s; |
| unsigned int power_of_two; |
| |
| htab = ppc_hash_table (info); |
| |
| /* Deal with function syms. */ |
| if (h->type == STT_FUNC |
| || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
| { |
| /* Clear procedure linkage table information for any symbol that |
| won't need a .plt entry. */ |
| struct plt_entry *ent; |
| for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| if (ent->plt.refcount > 0) |
| break; |
| if (!((struct ppc_link_hash_entry *) h)->is_func_descriptor |
| || ent == NULL |
| || SYMBOL_CALLS_LOCAL (info, h) |
| || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| && h->root.type == bfd_link_hash_undefweak)) |
| { |
| h->plt.plist = NULL; |
| h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| } |
| } |
| else |
| h->plt.plist = NULL; |
| |
| /* If this is a weak symbol, and there is a real definition, the |
| processor independent code will have arranged for us to see the |
| real definition first, and we can just use the same value. */ |
| if (h->weakdef != NULL) |
| { |
| BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined |
| || h->weakdef->root.type == bfd_link_hash_defweak); |
| h->root.u.def.section = h->weakdef->root.u.def.section; |
| h->root.u.def.value = h->weakdef->root.u.def.value; |
| if (ELIMINATE_COPY_RELOCS) |
| h->elf_link_hash_flags |
| = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF) |
| | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF)); |
| return TRUE; |
| } |
| |
| /* This is a reference to a symbol defined by a dynamic object which |
| is not a function. */ |
| |
| /* If we are creating a shared library, we must presume that the |
| only references to the symbol are via the global offset table. |
| For such cases we need not do anything here; the relocations will |
| be handled correctly by relocate_section. */ |
| if (info->shared) |
| return TRUE; |
| |
| /* If there are no references to this symbol that do not use the |
| GOT, we don't need to generate a copy reloc. */ |
| if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0) |
| return TRUE; |
| |
| if (ELIMINATE_COPY_RELOCS) |
| { |
| struct ppc_link_hash_entry * eh; |
| struct ppc_dyn_relocs *p; |
| |
| eh = (struct ppc_link_hash_entry *) h; |
| for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| { |
| s = p->sec->output_section; |
| if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| break; |
| } |
| |
| /* If we didn't find any dynamic relocs in read-only sections, then |
| we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| if (p == NULL) |
| { |
| h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF; |
| return TRUE; |
| } |
| } |
| |
| /* We must allocate the symbol in our .dynbss section, which will |
| become part of the .bss section of the executable. There will be |
| an entry for this symbol in the .dynsym section. The dynamic |
| object will contain position independent code, so all references |
| from the dynamic object to this symbol will go through the global |
| offset table. The dynamic linker will use the .dynsym entry to |
| determine the address it must put in the global offset table, so |
| both the dynamic object and the regular object will refer to the |
| same memory location for the variable. */ |
| |
| /* We must generate a R_PPC64_COPY reloc to tell the dynamic linker |
| to copy the initial value out of the dynamic object and into the |
| runtime process image. We need to remember the offset into the |
| .rela.bss section we are going to use. */ |
| if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| { |
| htab->srelbss->_raw_size += sizeof (Elf64_External_Rela); |
| h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
| } |
| |
| /* We need to figure out the alignment required for this symbol. I |
| have no idea how ELF linkers handle this. */ |
| power_of_two = bfd_log2 (h->size); |
| if (power_of_two > 4) |
| power_of_two = 4; |
| |
| /* Apply the required alignment. */ |
| s = htab->sdynbss; |
| s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two)); |
| if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
| { |
| if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
| return FALSE; |
| } |
| |
| /* Define the symbol as being at this point in the section. */ |
| h->root.u.def.section = s; |
| h->root.u.def.value = s->_raw_size; |
| |
| /* Increment the section size to make room for the symbol. */ |
| s->_raw_size += h->size; |
| |
| return TRUE; |
| } |
| |
| /* If given a function descriptor symbol, hide both the function code |
| sym and the descriptor. */ |
| static void |
| ppc64_elf_hide_symbol (info, h, force_local) |
| struct bfd_link_info *info; |
| struct elf_link_hash_entry *h; |
| bfd_boolean force_local; |
| { |
| _bfd_elf_link_hash_hide_symbol (info, h, force_local); |
| |
| if (((struct ppc_link_hash_entry *) h)->is_func_descriptor) |
| { |
| struct elf_link_hash_entry *fh = ((struct ppc_link_hash_entry *) h)->oh; |
| |
| if (fh == NULL) |
| { |
| const char *p, *q; |
| struct ppc_link_hash_table *htab; |
| char save; |
| |
| /* We aren't supposed to use alloca in BFD because on |
| systems which do not have alloca the version in libiberty |
| calls xmalloc, which might cause the program to crash |
| when it runs out of memory. This function doesn't have a |
| return status, so there's no way to gracefully return an |
| error. So cheat. We know that string[-1] can be safely |
| dereferenced; It's either a string in an ELF string |
| table, or allocated in an objalloc structure. */ |
| |
| p = h->root.root.string - 1; |
| save = *p; |
| *(char *) p = '.'; |
| htab = ppc_hash_table (info); |
| fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE); |
| *(char *) p = save; |
| |
| /* Unfortunately, if it so happens that the string we were |
| looking for was allocated immediately before this string, |
| then we overwrote the string terminator. That's the only |
| reason the lookup should fail. */ |
| if (fh == NULL) |
| { |
| q = h->root.root.string + strlen (h->root.root.string); |
| while (q >= h->root.root.string && *q == *p) |
| --q, --p; |
| if (q < h->root.root.string && *p == '.') |
| fh = elf_link_hash_lookup (&htab->elf, p, FALSE, FALSE, FALSE); |
| } |
| if (fh != NULL) |
| { |
| ((struct ppc_link_hash_entry *) h)->oh = fh; |
| ((struct ppc_link_hash_entry *) fh)->oh = h; |
| } |
| } |
| if (fh != NULL) |
| _bfd_elf_link_hash_hide_symbol (info, fh, force_local); |
| } |
| } |
| |
| static bfd_boolean |
| get_sym_h (hp, symp, symsecp, tls_maskp, locsymsp, r_symndx, ibfd) |
| struct elf_link_hash_entry **hp; |
| Elf_Internal_Sym **symp; |
| asection **symsecp; |
| char **tls_maskp; |
| Elf_Internal_Sym **locsymsp; |
| unsigned long r_symndx; |
| bfd *ibfd; |
| { |
| Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| |
| if (r_symndx >= symtab_hdr->sh_info) |
| { |
| struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); |
| struct elf_link_hash_entry *h; |
| |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| while (h->root.type == bfd_link_hash_indirect |
| || h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| if (hp != NULL) |
| *hp = h; |
| |
| if (symp != NULL) |
| *symp = NULL; |
| |
| if (symsecp != NULL) |
| { |
| asection *symsec = NULL; |
| if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| symsec = h->root.u.def.section; |
| *symsecp = symsec; |
| } |
| |
| if (tls_maskp != NULL) |
| { |
| struct ppc_link_hash_entry *eh; |
| |
| eh = (struct ppc_link_hash_entry *) h; |
| *tls_maskp = &eh->tls_mask; |
| } |
| } |
| else |
| { |
| Elf_Internal_Sym *sym; |
| Elf_Internal_Sym *locsyms = *locsymsp; |
| |
| if (locsyms == NULL) |
| { |
| locsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| if (locsyms == NULL) |
| locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, |
| symtab_hdr->sh_info, |
| 0, NULL, NULL, NULL); |
| if (locsyms == NULL) |
| return FALSE; |
| *locsymsp = locsyms; |
| } |
| sym = locsyms + r_symndx; |
| |
| if (hp != NULL) |
| *hp = NULL; |
| |
| if (symp != NULL) |
| *symp = sym; |
| |
| if (symsecp != NULL) |
| { |
| asection *symsec = NULL; |
| if ((sym->st_shndx != SHN_UNDEF |
| && sym->st_shndx < SHN_LORESERVE) |
| || sym->st_shndx > SHN_HIRESERVE) |
| symsec = bfd_section_from_elf_index (ibfd, sym->st_shndx); |
| *symsecp = symsec; |
| } |
| |
| if (tls_maskp != NULL) |
| { |
| struct got_entry **lgot_ents; |
| char *tls_mask; |
| |
| tls_mask = NULL; |
| lgot_ents = elf_local_got_ents (ibfd); |
| if (lgot_ents != NULL) |
| { |
| char *lgot_masks = (char *) (lgot_ents + symtab_hdr->sh_info); |
| tls_mask = &lgot_masks[r_symndx]; |
| } |
| *tls_maskp = tls_mask; |
| } |
| } |
| return TRUE; |
| } |
| |
| /* Returns TLS_MASKP for the given REL symbol. Function return is 0 on |
| error, 2 on a toc GD type suitable for optimization, 3 on a toc LD |
| type suitable for optimization, and 1 otherwise. */ |
| |
| static int |
| get_tls_mask (tls_maskp, locsymsp, rel, ibfd) |
| char **tls_maskp; |
| Elf_Internal_Sym **locsymsp; |
| const Elf_Internal_Rela *rel; |
| bfd *ibfd; |
| { |
| unsigned long r_symndx; |
| unsigned int next_r; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| asection *sec; |
| bfd_vma off; |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) |
| return 0; |
| |
| if ((*tls_maskp != NULL && **tls_maskp != 0) |
| || sec == NULL |
| || ppc64_elf_section_data (sec)->t_symndx == NULL) |
| return 1; |
| |
| /* Look inside a TOC section too. */ |
| if (h != NULL) |
| { |
| BFD_ASSERT (h->root.type == bfd_link_hash_defined); |
| off = h->root.u.def.value; |
| } |
| else |
| off = sym->st_value; |
| off += rel->r_addend; |
| BFD_ASSERT (off % 8 == 0); |
| r_symndx = ppc64_elf_section_data (sec)->t_symndx[off / 8]; |
| next_r = ppc64_elf_section_data (sec)->t_symndx[off / 8 + 1]; |
| if (!get_sym_h (&h, &sym, &sec, tls_maskp, locsymsp, r_symndx, ibfd)) |
| return 0; |
| if (h == NULL |
| || h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| if (next_r == (unsigned) -1) |
| return 2; |
| if (next_r == (unsigned) -2 |
| && (h == NULL |
| || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))) |
| return 3; |
| } |
| return 1; |
| } |
| |
| bfd_boolean |
| ppc64_elf_edit_opd (obfd, info) |
| bfd *obfd; |
| struct bfd_link_info *info; |
| { |
| bfd *ibfd; |
| |
| for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| { |
| asection *sec; |
| Elf_Internal_Rela *relstart, *rel, *relend; |
| Elf_Internal_Shdr *symtab_hdr; |
| Elf_Internal_Sym *local_syms; |
| struct elf_link_hash_entry **sym_hashes; |
| bfd_vma offset; |
| bfd_size_type amt; |
| long *adjust; |
| bfd_boolean need_edit; |
| |
| sec = bfd_get_section_by_name (ibfd, ".opd"); |
| if (sec == NULL) |
| continue; |
| |
| amt = sec->_raw_size * sizeof (long) / 24; |
| adjust = ppc64_elf_section_data (sec)->opd.adjust; |
| if (adjust == NULL) |
| { |
| /* Must be a ld -r link. ie. check_relocs hasn't been |
| called. */ |
| adjust = (long *) bfd_zalloc (obfd, amt); |
| ppc64_elf_section_data (sec)->opd.adjust = adjust; |
| } |
| memset (adjust, 0, (size_t) amt); |
| |
| if (sec->output_section == bfd_abs_section_ptr) |
| continue; |
| |
| /* Look through the section relocs. */ |
| if ((sec->flags & SEC_RELOC) == 0 || sec->reloc_count == 0) |
| continue; |
| |
| local_syms = NULL; |
| symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (ibfd); |
| |
| /* Read the relocations. */ |
| relstart = _bfd_elf_link_read_relocs (ibfd, sec, (PTR) NULL, |
| (Elf_Internal_Rela *) NULL, |
| info->keep_memory); |
| if (relstart == NULL) |
| return FALSE; |
| |
| /* First run through the relocs to check they are sane, and to |
| determine whether we need to edit this opd section. */ |
| need_edit = FALSE; |
| offset = 0; |
| relend = relstart + sec->reloc_count; |
| for (rel = relstart; rel < relend; rel++) |
| { |
| enum elf_ppc64_reloc_type r_type; |
| unsigned long r_symndx; |
| asection *sym_sec; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| |
| /* .opd contains a regular array of 24 byte entries. We're |
| only interested in the reloc pointing to a function entry |
| point. */ |
| r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info); |
| if (r_type == R_PPC64_TOC) |
| continue; |
| |
| if (r_type != R_PPC64_ADDR64) |
| { |
| (*_bfd_error_handler) |
| (_("%s: unexpected reloc type %u in .opd section"), |
| bfd_archive_filename (ibfd), r_type); |
| need_edit = FALSE; |
| break; |
| } |
| |
| if (rel + 1 >= relend) |
| continue; |
| r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE ((rel + 1)->r_info); |
| if (r_type != R_PPC64_TOC) |
| continue; |
| |
| if (rel->r_offset != offset) |
| { |
| /* If someone messes with .opd alignment then after a |
| "ld -r" we might have padding in the middle of .opd. |
| Also, there's nothing to prevent someone putting |
| something silly in .opd with the assembler. No .opd |
| optimization for them! */ |
| (*_bfd_error_handler) |
| (_("%s: .opd is not a regular array of opd entries"), |
| bfd_archive_filename (ibfd)); |
| need_edit = FALSE; |
| break; |
| } |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| r_symndx, ibfd)) |
| goto error_free_rel; |
| |
| if (sym_sec == NULL || sym_sec->owner == NULL) |
| { |
| const char *sym_name; |
| if (h != NULL) |
| sym_name = h->root.root.string; |
| else |
| sym_name = bfd_elf_local_sym_name (ibfd, sym); |
| |
| (*_bfd_error_handler) |
| (_("%s: undefined sym `%s' in .opd section"), |
| bfd_archive_filename (ibfd), |
| sym_name); |
| need_edit = FALSE; |
| break; |
| } |
| |
| /* opd entries are always for functions defined in the |
| current input bfd. If the symbol isn't defined in the |
| input bfd, then we won't be using the function in this |
| bfd; It must be defined in a linkonce section in another |
| bfd, or is weak. It's also possible that we are |
| discarding the function due to a linker script /DISCARD/, |
| which we test for via the output_section. */ |
| if (sym_sec->owner != ibfd |
| || sym_sec->output_section == bfd_abs_section_ptr) |
| need_edit = TRUE; |
| |
| offset += 24; |
| } |
| |
| if (need_edit) |
| { |
| Elf_Internal_Rela *write_rel; |
| bfd_byte *rptr, *wptr; |
| bfd_boolean skip; |
| |
| /* This seems a waste of time as input .opd sections are all |
| zeros as generated by gcc, but I suppose there's no reason |
| this will always be so. We might start putting something in |
| the third word of .opd entries. */ |
| if ((sec->flags & SEC_IN_MEMORY) == 0) |
| { |
| bfd_byte *loc = bfd_alloc (ibfd, sec->_raw_size); |
| if (loc == NULL |
| || !bfd_get_section_contents (ibfd, sec, loc, (bfd_vma) 0, |
| sec->_raw_size)) |
| { |
| if (local_syms != NULL |
| && symtab_hdr->contents != (unsigned char *) local_syms) |
| free (local_syms); |
| error_free_rel: |
| if (elf_section_data (sec)->relocs != relstart) |
| free (relstart); |
| return FALSE; |
| } |
| sec->contents = loc; |
| sec->flags |= (SEC_IN_MEMORY | SEC_HAS_CONTENTS); |
| } |
| |
| elf_section_data (sec)->relocs = relstart; |
| |
| wptr = sec->contents; |
| rptr = sec->contents; |
| write_rel = relstart; |
| skip = FALSE; |
| offset = 0; |
| for (rel = relstart; rel < relend; rel++) |
| { |
| if (rel->r_offset == offset) |
| { |
| unsigned long r_symndx; |
| asection *sym_sec; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| r_symndx, ibfd); |
| |
| skip = (sym_sec->owner != ibfd |
| || sym_sec->output_section == bfd_abs_section_ptr); |
| if (skip) |
| { |
| if (h != NULL && sym_sec->owner == ibfd) |
| { |
| /* Arrange for the function descriptor sym |
| to be dropped. */ |
| struct ppc_link_hash_entry *fdh; |
| struct ppc_link_hash_entry *fh; |
| |
| fh = (struct ppc_link_hash_entry *) h; |
| fdh = (struct ppc_link_hash_entry *) fh->oh; |
| if (fdh == NULL) |
| { |
| const char *fd_name; |
| struct ppc_link_hash_table *htab; |
| |
| fd_name = h->root.root.string + 1; |
| htab = ppc_hash_table (info); |
| fdh = (struct ppc_link_hash_entry *) |
| elf_link_hash_lookup (&htab->elf, fd_name, |
| FALSE, FALSE, FALSE); |
| fdh->is_func_descriptor = 1; |
| fdh->oh = &fh->elf; |
| fh->is_func = 1; |
| fh->oh = &fdh->elf; |
| } |
| |
| fdh->elf.root.u.def.value = 0; |
| fdh->elf.root.u.def.section = sym_sec; |
| } |
| } |
| else |
| { |
| /* We'll be keeping this opd entry. */ |
| |
| if (h != NULL) |
| { |
| /* Redefine the function descriptor symbol |
| to this location in the opd section. |
| We've checked above that opd relocs are |
| ordered. */ |
| struct ppc_link_hash_entry *fdh; |
| struct ppc_link_hash_entry *fh; |
| |
| fh = (struct ppc_link_hash_entry *) h; |
| fdh = (struct ppc_link_hash_entry *) fh->oh; |
| if (fdh == NULL) |
| { |
| const char *fd_name; |
| struct ppc_link_hash_table *htab; |
| |
| fd_name = h->root.root.string + 1; |
| htab = ppc_hash_table (info); |
| fdh = (struct ppc_link_hash_entry *) |
| elf_link_hash_lookup (&htab->elf, fd_name, |
| FALSE, FALSE, FALSE); |
| fdh->is_func_descriptor = 1; |
| fdh->oh = &fh->elf; |
| fh->is_func = 1; |
| fh->oh = &fdh->elf; |
| } |
| |
| fdh->elf.root.u.def.value = wptr - sec->contents; |
| } |
| else |
| { |
| /* Local syms are a bit tricky. We could |
| tweak them as they can be cached, but |
| we'd need to look through the local syms |
| for the function descriptor sym which we |
| don't have at the moment. So keep an |
| array of adjustments. */ |
| adjust[rel->r_offset / 24] = wptr - rptr; |
| } |
| |
| if (wptr != rptr) |
| memcpy (wptr, rptr, 24); |
| wptr += 24; |
| } |
| rptr += 24; |
| offset += 24; |
| } |
| |
| /* We need to adjust any reloc offsets to point to the |
| new opd entries. While we're at it, we may as well |
| remove redundant relocs. */ |
| if (!skip) |
| { |
| rel->r_offset += wptr - rptr; |
| if (write_rel != rel) |
| memcpy (write_rel, rel, sizeof (*rel)); |
| ++write_rel; |
| } |
| } |
| |
| sec->_cooked_size = wptr - sec->contents; |
| sec->reloc_count = write_rel - relstart; |
| /* Fudge the size too, as this is used later in |
| elf_bfd_final_link if we are emitting relocs. */ |
| elf_section_data (sec)->rel_hdr.sh_size |
| = sec->reloc_count * elf_section_data (sec)->rel_hdr.sh_entsize; |
| BFD_ASSERT (elf_section_data (sec)->rel_hdr2 == NULL); |
| } |
| else if (elf_section_data (sec)->relocs != relstart) |
| free (relstart); |
| |
| if (local_syms != NULL |
| && symtab_hdr->contents != (unsigned char *) local_syms) |
| { |
| if (!info->keep_memory) |
| free (local_syms); |
| else |
| symtab_hdr->contents = (unsigned char *) local_syms; |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| /* Set htab->tls_sec. */ |
| |
| bfd_boolean |
| ppc64_elf_tls_setup (obfd, info) |
| bfd *obfd; |
| struct bfd_link_info *info; |
| { |
| asection *tls; |
| struct ppc_link_hash_table *htab; |
| |
| for (tls = obfd->sections; tls != NULL; tls = tls->next) |
| if ((tls->flags & (SEC_THREAD_LOCAL | SEC_LOAD)) |
| == (SEC_THREAD_LOCAL | SEC_LOAD)) |
| break; |
| |
| htab = ppc_hash_table (info); |
| htab->tls_sec = tls; |
| |
| if (htab->tls_get_addr != NULL) |
| { |
| struct elf_link_hash_entry *h = htab->tls_get_addr; |
| |
| while (h->root.type == bfd_link_hash_indirect |
| || h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| htab->tls_get_addr = h; |
| } |
| |
| return tls != NULL; |
| } |
| |
| /* Run through all the TLS relocs looking for optimization |
| opportunities. The linker has been hacked (see ppc64elf.em) to do |
| a preliminary section layout so that we know the TLS segment |
| offsets. We can't optimize earlier because some optimizations need |
| to know the tp offset, and we need to optimize before allocating |
| dynamic relocations. */ |
| |
| bfd_boolean |
| ppc64_elf_tls_optimize (obfd, info) |
| bfd *obfd ATTRIBUTE_UNUSED; |
| struct bfd_link_info *info; |
| { |
| bfd *ibfd; |
| asection *sec; |
| struct ppc_link_hash_table *htab; |
| |
| if (info->relocateable || info->shared) |
| return TRUE; |
| |
| htab = ppc_hash_table (info); |
| for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| { |
| Elf_Internal_Sym *locsyms = NULL; |
| |
| for (sec = ibfd->sections; sec != NULL; sec = sec->next) |
| if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section)) |
| { |
| Elf_Internal_Rela *relstart, *rel, *relend; |
| int expecting_tls_get_addr; |
| |
| /* Read the relocations. */ |
| relstart = _bfd_elf_link_read_relocs (ibfd, sec, (PTR) NULL, |
| (Elf_Internal_Rela *) NULL, |
| info->keep_memory); |
| if (relstart == NULL) |
| return FALSE; |
| |
| expecting_tls_get_addr = 0; |
| relend = relstart + sec->reloc_count; |
| for (rel = relstart; rel < relend; rel++) |
| { |
| enum elf_ppc64_reloc_type r_type; |
| unsigned long r_symndx; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| asection *sym_sec; |
| char *tls_mask; |
| char tls_set, tls_clear, tls_type = 0; |
| bfd_vma value; |
| bfd_boolean ok_tprel, is_local; |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| if (!get_sym_h (&h, &sym, &sym_sec, &tls_mask, &locsyms, |
| r_symndx, ibfd)) |
| { |
| err_free_rel: |
| if (elf_section_data (sec)->relocs != relstart) |
| free (relstart); |
| if (locsyms != NULL |
| && (elf_tdata (ibfd)->symtab_hdr.contents |
| != (unsigned char *) locsyms)) |
| free (locsyms); |
| return FALSE; |
| } |
| |
| if (h != NULL) |
| { |
| if (h->root.type != bfd_link_hash_defined |
| && h->root.type != bfd_link_hash_defweak) |
| continue; |
| value = h->root.u.def.value; |
| } |
| else |
| value = sym->st_value; |
| |
| ok_tprel = FALSE; |
| is_local = FALSE; |
| if (h == NULL |
| || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)) |
| { |
| is_local = TRUE; |
| value += sym_sec->output_offset; |
| value += sym_sec->output_section->vma; |
| value -= htab->tls_sec->vma; |
| ok_tprel = (value + TP_OFFSET + ((bfd_vma) 1 << 31) |
| < (bfd_vma) 1 << 32); |
| } |
| |
| r_type |
| = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info); |
| switch (r_type) |
| { |
| case R_PPC64_GOT_TLSLD16: |
| case R_PPC64_GOT_TLSLD16_LO: |
| case R_PPC64_GOT_TLSLD16_HI: |
| case R_PPC64_GOT_TLSLD16_HA: |
| /* These relocs should never be against a symbol |
| defined in a shared lib. Leave them alone if |
| that turns out to be the case. */ |
| htab->tlsld_got.refcount -= 1; |
| if (!is_local) |
| continue; |
| |
| /* LD -> LE */ |
| tls_set = 0; |
| tls_clear = TLS_LD; |
| tls_type = TLS_TLS | TLS_LD; |
| expecting_tls_get_addr = 1; |
| break; |
| |
| case R_PPC64_GOT_TLSGD16: |
| case R_PPC64_GOT_TLSGD16_LO: |
| case R_PPC64_GOT_TLSGD16_HI: |
| case R_PPC64_GOT_TLSGD16_HA: |
| if (ok_tprel) |
| /* GD -> LE */ |
| tls_set = 0; |
| else |
| /* GD -> IE */ |
| tls_set = TLS_TLS | TLS_TPRELGD; |
| tls_clear = TLS_GD; |
| tls_type = TLS_TLS | TLS_GD; |
| expecting_tls_get_addr = 1; |
| break; |
| |
| case R_PPC64_GOT_TPREL16_DS: |
| case R_PPC64_GOT_TPREL16_LO_DS: |
| case R_PPC64_GOT_TPREL16_HI: |
| case R_PPC64_GOT_TPREL16_HA: |
| expecting_tls_get_addr = 0; |
| if (ok_tprel) |
| { |
| /* IE -> LE */ |
| tls_set = 0; |
| tls_clear = TLS_TPREL; |
| tls_type = TLS_TLS | TLS_TPREL; |
| break; |
| } |
| else |
| continue; |
| |
| case R_PPC64_REL14: |
| case R_PPC64_REL14_BRTAKEN: |
| case R_PPC64_REL14_BRNTAKEN: |
| case R_PPC64_REL24: |
| if (h != NULL |
| && h == htab->tls_get_addr) |
| { |
| if (!expecting_tls_get_addr |
| && rel != relstart |
| && ((ELF64_R_TYPE (rel[-1].r_info) |
| == R_PPC64_TOC16) |
| || (ELF64_R_TYPE (rel[-1].r_info) |
| == R_PPC64_TOC16_LO))) |
| { |
| /* Check for toc tls entries. */ |
| char *toc_tls; |
| int retval; |
| |
| retval = get_tls_mask (&toc_tls, &locsyms, |
| rel - 1, ibfd); |
| if (retval == 0) |
| goto err_free_rel; |
| if (toc_tls != NULL) |
| expecting_tls_get_addr = retval > 1; |
| } |
| |
| if (expecting_tls_get_addr) |
| { |
| struct plt_entry *ent; |
| for (ent = h->plt.plist; ent; ent = ent->next) |
| if (ent->addend == 0) |
| { |
| if (ent->plt.refcount > 0) |
| ent->plt.refcount -= 1; |
| break; |
| } |
| } |
| } |
| expecting_tls_get_addr = 0; |
| continue; |
| |
| case R_PPC64_TPREL64: |
| expecting_tls_get_addr = 0; |
| if (ok_tprel) |
| { |
| /* IE -> LE */ |
| tls_set = TLS_EXPLICIT; |
| tls_clear = TLS_TPREL; |
| break; |
| } |
| else |
| continue; |
| |
| case R_PPC64_DTPMOD64: |
| expecting_tls_get_addr = 0; |
| if (rel + 1 < relend |
| && (rel[1].r_info |
| == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64)) |
| && rel[1].r_offset == rel->r_offset + 8) |
| { |
| if (ok_tprel) |
| /* GD -> LE */ |
| tls_set = TLS_EXPLICIT | TLS_GD; |
| else |
| /* GD -> IE */ |
| tls_set = TLS_EXPLICIT | TLS_GD | TLS_TPRELGD; |
| tls_clear = TLS_GD; |
| } |
| else |
| { |
| if (!is_local) |
| continue; |
| |
| /* LD -> LE */ |
| tls_set = TLS_EXPLICIT; |
| tls_clear = TLS_LD; |
| } |
| break; |
| |
| default: |
| expecting_tls_get_addr = 0; |
| continue; |
| } |
| |
| if ((tls_set & TLS_EXPLICIT) == 0) |
| { |
| struct got_entry *ent; |
| |
| /* Adjust got entry for this reloc. */ |
| if (h != NULL) |
| ent = h->got.glist; |
| else |
| ent = elf_local_got_ents (ibfd)[r_symndx]; |
| |
| for (; ent != NULL; ent = ent->next) |
| if (ent->addend == rel->r_addend |
| && ent->tls_type == tls_type) |
| break; |
| if (ent == NULL) |
| abort (); |
| |
| if (tls_set == 0) |
| { |
| /* We managed to get rid of a got entry. */ |
| if (ent->got.refcount > 0) |
| ent->got.refcount -= 1; |
| } |
| } |
| else if (h != NULL) |
| { |
| struct ppc_link_hash_entry * eh; |
| struct ppc_dyn_relocs **pp; |
| struct ppc_dyn_relocs *p; |
| |
| /* Adjust dynamic relocs. */ |
| eh = (struct ppc_link_hash_entry *) h; |
| for (pp = &eh->dyn_relocs; |
| (p = *pp) != NULL; |
| pp = &p->next) |
| if (p->sec == sec) |
| { |
| /* If we got rid of a DTPMOD/DTPREL reloc |
| pair then we'll lose one or two dyn |
| relocs. */ |
| if (tls_set == (TLS_EXPLICIT | TLS_GD)) |
| p->count -= 1; |
| p->count -= 1; |
| if (p->count == 0) |
| *pp = p->next; |
| break; |
| } |
| } |
| |
| *tls_mask |= tls_set; |
| *tls_mask &= ~tls_clear; |
| } |
| |
| if (elf_section_data (sec)->relocs != relstart) |
| free (relstart); |
| } |
| |
| if (locsyms != NULL |
| && (elf_tdata (ibfd)->symtab_hdr.contents |
| != (unsigned char *) locsyms)) |
| { |
| if (!info->keep_memory) |
| free (locsyms); |
| else |
| elf_tdata (ibfd)->symtab_hdr.contents = (unsigned char *) locsyms; |
| } |
| } |
| return TRUE; |
| } |
| |
| /* This is the condition under which ppc64_elf_finish_dynamic_symbol |
| will be called from elflink.h. If elflink.h doesn't call our |
| finish_dynamic_symbol routine, we'll need to do something about |
| initializing any .plt and .got entries in ppc64_elf_relocate_section. */ |
| #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \ |
| ((DYN) \ |
| && ((SHARED) \ |
| || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ |
| && ((H)->dynindx != -1 \ |
| || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) |
| |
| /* Allocate space in .plt, .got and associated reloc sections for |
| dynamic relocs. */ |
| |
| static bfd_boolean |
| allocate_dynrelocs (h, inf) |
| struct elf_link_hash_entry *h; |
| PTR inf; |
| { |
| struct bfd_link_info *info; |
| struct ppc_link_hash_table *htab; |
| asection *s; |
| struct ppc_link_hash_entry *eh; |
| struct ppc_dyn_relocs *p; |
| struct got_entry *gent; |
| |
| if (h->root.type == bfd_link_hash_indirect) |
| return TRUE; |
| |
| if (h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| info = (struct bfd_link_info *) inf; |
| htab = ppc_hash_table (info); |
| |
| if (htab->elf.dynamic_sections_created |
| && h->dynindx != -1 |
| && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h)) |
| { |
| struct plt_entry *pent; |
| bfd_boolean doneone = FALSE; |
| for (pent = h->plt.plist; pent != NULL; pent = pent->next) |
| if (pent->plt.refcount > 0) |
| { |
| BFD_ASSERT (((struct ppc_link_hash_entry *) h)->is_func_descriptor); |
| |
| /* If this is the first .plt entry, make room for the special |
| first entry. */ |
| s = htab->splt; |
| if (s->_raw_size == 0) |
| s->_raw_size += PLT_INITIAL_ENTRY_SIZE; |
| |
| pent->plt.offset = s->_raw_size; |
| |
| /* Make room for this entry. */ |
| s->_raw_size += PLT_ENTRY_SIZE; |
| |
| /* Make room for the .glink code. */ |
| s = htab->sglink; |
| if (s->_raw_size == 0) |
| s->_raw_size += GLINK_CALL_STUB_SIZE; |
| /* We need bigger stubs past index 32767. */ |
| if (s->_raw_size >= GLINK_CALL_STUB_SIZE + 32768*2*4) |
| s->_raw_size += 4; |
| s->_raw_size += 2*4; |
| |
| /* We also need to make an entry in the .rela.plt section. */ |
| s = htab->srelplt; |
| s->_raw_size += sizeof (Elf64_External_Rela); |
| doneone = TRUE; |
| } |
| else |
| pent->plt.offset = (bfd_vma) -1; |
| if (!doneone) |
| { |
| h->plt.plist = NULL; |
| h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| } |
| } |
| else |
| { |
| h->plt.plist = NULL; |
| h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
| } |
| |
| eh = (struct ppc_link_hash_entry *) h; |
| /* Run through the TLS GD got entries first if we're changing them |
| to TPREL. */ |
| if ((eh->tls_mask & TLS_TPRELGD) != 0) |
| for (gent = h->got.glist; gent != NULL; gent = gent->next) |
| if (gent->got.refcount > 0 |
| && (gent->tls_type & TLS_GD) != 0) |
| { |
| /* This was a GD entry that has been converted to TPREL. If |
| there happens to be a TPREL entry we can use that one. */ |
| struct got_entry *ent; |
| for (ent = h->got.glist; ent != NULL; ent = ent->next) |
| if (ent->got.refcount > 0 |
| && (ent->tls_type & TLS_TPREL) != 0 |
| && ent->addend == gent->addend) |
| { |
| gent->got.refcount = 0; |
| break; |
| } |
| |
| /* If not, then we'll be using our own TPREL entry. */ |
| if (gent->got.refcount != 0) |
| gent->tls_type = TLS_TLS | TLS_TPREL; |
| } |
| |
| for (gent = h->got.glist; gent != NULL; gent = gent->next) |
| if (gent->got.refcount > 0) |
| { |
| bfd_boolean dyn; |
| |
| /* Make sure this symbol is output as a dynamic symbol. |
| Undefined weak syms won't yet be marked as dynamic, |
| nor will all TLS symbols. */ |
| if (h->dynindx == -1 |
| && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| { |
| if (! bfd_elf64_link_record_dynamic_symbol (info, h)) |
| return FALSE; |
| } |
| |
| if ((gent->tls_type & TLS_LD) != 0 |
| && !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)) |
| { |
| gent->got.offset = htab->tlsld_got.offset; |
| continue; |
| } |
| |
| s = htab->sgot; |
| gent->got.offset = s->_raw_size; |
| s->_raw_size |
| += (gent->tls_type & eh->tls_mask & (TLS_GD | TLS_LD)) ? 16 : 8; |
| dyn = htab->elf.dynamic_sections_created; |
| if ((info->shared |
| || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)) |
| && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| || h->root.type != bfd_link_hash_undefweak)) |
| htab->srelgot->_raw_size |
| += (gent->tls_type & eh->tls_mask & TLS_GD |
| ? 2 * sizeof (Elf64_External_Rela) |
| : sizeof (Elf64_External_Rela)); |
| } |
| else |
| gent->got.offset = (bfd_vma) -1; |
| |
| if (eh->dyn_relocs == NULL) |
| return TRUE; |
| |
| /* In the shared -Bsymbolic case, discard space allocated for |
| dynamic pc-relative relocs against symbols which turn out to be |
| defined in regular objects. For the normal shared case, discard |
| space for relocs that have become local due to symbol visibility |
| changes. */ |
| |
| if (info->shared) |
| { |
| /* Relocs that use pc_count are those that appear on a call insn, |
| or certain REL relocs (see MUST_BE_DYN_RELOC) that can be |
| generated via assembly. We want calls to protected symbols to |
| resolve directly to the function rather than going via the plt. |
| If people want function pointer comparisons to work as expected |
| then they should avoid writing weird assembly. */ |
| if (SYMBOL_CALLS_LOCAL (info, h)) |
| { |
| struct ppc_dyn_relocs **pp; |
| |
| for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
| { |
| p->count -= p->pc_count; |
| p->pc_count = 0; |
| if (p->count == 0) |
| *pp = p->next; |
| else |
| pp = &p->next; |
| } |
| } |
| |
| /* Also discard relocs on undefined weak syms with non-default |
| visibility. */ |
| if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
| && h->root.type == bfd_link_hash_undefweak) |
| eh->dyn_relocs = NULL; |
| } |
| else if (ELIMINATE_COPY_RELOCS) |
| { |
| /* For the non-shared case, discard space for relocs against |
| symbols which turn out to need copy relocs or are not |
| dynamic. */ |
| |
| if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| { |
| /* Make sure this symbol is output as a dynamic symbol. |
| Undefined weak syms won't yet be marked as dynamic. */ |
| if (h->dynindx == -1 |
| && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) |
| { |
| if (! bfd_elf64_link_record_dynamic_symbol (info, h)) |
| return FALSE; |
| } |
| |
| /* If that succeeded, we know we'll be keeping all the |
| relocs. */ |
| if (h->dynindx != -1) |
| goto keep; |
| } |
| |
| eh->dyn_relocs = NULL; |
| |
| keep: ; |
| } |
| |
| /* Finally, allocate space. */ |
| for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| { |
| asection *sreloc = elf_section_data (p->sec)->sreloc; |
| sreloc->_raw_size += p->count * sizeof (Elf64_External_Rela); |
| } |
| |
| return TRUE; |
| } |
| |
| /* Find any dynamic relocs that apply to read-only sections. */ |
| |
| static bfd_boolean |
| readonly_dynrelocs (h, inf) |
| struct elf_link_hash_entry *h; |
| PTR inf; |
| { |
| struct ppc_link_hash_entry *eh; |
| struct ppc_dyn_relocs *p; |
| |
| if (h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| |
| eh = (struct ppc_link_hash_entry *) h; |
| for (p = eh->dyn_relocs; p != NULL; p = p->next) |
| { |
| asection *s = p->sec->output_section; |
| |
| if (s != NULL && (s->flags & SEC_READONLY) != 0) |
| { |
| struct bfd_link_info *info = (struct bfd_link_info *) inf; |
| |
| info->flags |= DF_TEXTREL; |
| |
| /* Not an error, just cut short the traversal. */ |
| return FALSE; |
| } |
| } |
| return TRUE; |
| } |
| |
| /* Set the sizes of the dynamic sections. */ |
| |
| static bfd_boolean |
| ppc64_elf_size_dynamic_sections (output_bfd, info) |
| bfd *output_bfd ATTRIBUTE_UNUSED; |
| struct bfd_link_info *info; |
| { |
| struct ppc_link_hash_table *htab; |
| bfd *dynobj; |
| asection *s; |
| bfd_boolean relocs; |
| bfd *ibfd; |
| |
| htab = ppc_hash_table (info); |
| dynobj = htab->elf.dynobj; |
| if (dynobj == NULL) |
| abort (); |
| |
| if (htab->elf.dynamic_sections_created) |
| { |
| /* Set the contents of the .interp section to the interpreter. */ |
| if (info->executable) |
| { |
| s = bfd_get_section_by_name (dynobj, ".interp"); |
| if (s == NULL) |
| abort (); |
| s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| } |
| } |
| |
| if (htab->tlsld_got.refcount > 0) |
| { |
| htab->tlsld_got.offset = htab->sgot->_raw_size; |
| htab->sgot->_raw_size += 16; |
| if (info->shared) |
| htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); |
| } |
| else |
| htab->tlsld_got.offset = (bfd_vma) -1; |
| |
| /* Set up .got offsets for local syms, and space for local dynamic |
| relocs. */ |
| for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| { |
| struct got_entry **lgot_ents; |
| struct got_entry **end_lgot_ents; |
| char *lgot_masks; |
| bfd_size_type locsymcount; |
| Elf_Internal_Shdr *symtab_hdr; |
| asection *srel; |
| |
| if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
| continue; |
| |
| for (s = ibfd->sections; s != NULL; s = s->next) |
| { |
| struct ppc_dyn_relocs *p; |
| |
| for (p = *((struct ppc_dyn_relocs **) |
| &elf_section_data (s)->local_dynrel); |
| p != NULL; |
| p = p->next) |
| { |
| if (!bfd_is_abs_section (p->sec) |
| && bfd_is_abs_section (p->sec->output_section)) |
| { |
| /* Input section has been discarded, either because |
| it is a copy of a linkonce section or due to |
| linker script /DISCARD/, so we'll be discarding |
| the relocs too. */ |
| } |
| else if (p->count != 0) |
| { |
| srel = elf_section_data (p->sec)->sreloc; |
| srel->_raw_size += p->count * sizeof (Elf64_External_Rela); |
| if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| info->flags |= DF_TEXTREL; |
| } |
| } |
| } |
| |
| lgot_ents = elf_local_got_ents (ibfd); |
| if (!lgot_ents) |
| continue; |
| |
| symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| locsymcount = symtab_hdr->sh_info; |
| end_lgot_ents = lgot_ents + locsymcount; |
| lgot_masks = (char *) end_lgot_ents; |
| s = htab->sgot; |
| srel = htab->srelgot; |
| for (; lgot_ents < end_lgot_ents; ++lgot_ents, ++lgot_masks) |
| { |
| struct got_entry *ent; |
| |
| for (ent = *lgot_ents; ent != NULL; ent = ent->next) |
| if (ent->got.refcount > 0) |
| { |
| if ((ent->tls_type & *lgot_masks & TLS_LD) != 0) |
| { |
| if (htab->tlsld_got.offset == (bfd_vma) -1) |
| { |
| htab->tlsld_got.offset = s->_raw_size; |
| s->_raw_size += 16; |
| if (info->shared) |
| srel->_raw_size += sizeof (Elf64_External_Rela); |
| } |
| ent->got.offset = htab->tlsld_got.offset; |
| } |
| else |
| { |
| ent->got.offset = s->_raw_size; |
| if ((ent->tls_type & *lgot_masks & TLS_GD) != 0) |
| { |
| s->_raw_size += 16; |
| if (info->shared) |
| srel->_raw_size += 2 * sizeof (Elf64_External_Rela); |
| } |
| else |
| { |
| s->_raw_size += 8; |
| if (info->shared) |
| srel->_raw_size += sizeof (Elf64_External_Rela); |
| } |
| } |
| } |
| else |
| ent->got.offset = (bfd_vma) -1; |
| } |
| } |
| |
| /* Allocate global sym .plt and .got entries, and space for global |
| sym dynamic relocs. */ |
| elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); |
| |
| /* We now have determined the sizes of the various dynamic sections. |
| Allocate memory for them. */ |
| relocs = FALSE; |
| for (s = dynobj->sections; s != NULL; s = s->next) |
| { |
| if ((s->flags & SEC_LINKER_CREATED) == 0) |
| continue; |
| |
| /* Reset _cooked_size since prelim layout will set it wrongly, |
| and a non-zero _cooked_size sticks. */ |
| s->_cooked_size = 0; |
| |
| if (s == htab->sbrlt || s == htab->srelbrlt) |
| /* These haven't been allocated yet; don't strip. */ |
| continue; |
| else if (s == htab->sgot) |
| { |
| /* Automatic multiple tocs aren't possible if we are using the |
| GOT. The GOT is accessed via r2, so we can't adjust r2. |
| FIXME: There's no reason why we couldn't lay out multiple |
| GOTs too. */ |
| if (s->_raw_size > elf_backend_got_header_size) |
| htab->no_multi_toc = 1; |
| } |
| else if (s == htab->splt |
| || s == htab->sglink) |
| { |
| /* Strip this section if we don't need it; see the |
| comment below. */ |
| } |
| else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) |
| { |
| if (s->_raw_size == 0) |
| { |
| /* If we don't need this section, strip it from the |
| output file. This is mostly to handle .rela.bss and |
| .rela.plt. We must create both sections in |
| create_dynamic_sections, because they must be created |
| before the linker maps input sections to output |
| sections. The linker does that before |
| adjust_dynamic_symbol is called, and it is that |
| function which decides whether anything needs to go |
| into these sections. */ |
| } |
| else |
| { |
| if (s != htab->srelplt) |
| relocs = TRUE; |
| |
| /* We use the reloc_count field as a counter if we need |
| to copy relocs into the output file. */ |
| s->reloc_count = 0; |
| } |
| } |
| else |
| { |
| /* It's not one of our sections, so don't allocate space. */ |
| continue; |
| } |
| |
| if (s->_raw_size == 0) |
| { |
| _bfd_strip_section_from_output (info, s); |
| continue; |
| } |
| |
| /* .plt is in the bss section. We don't initialise it. */ |
| if ((s->flags & SEC_LOAD) == 0) |
| continue; |
| |
| /* Allocate memory for the section contents. We use bfd_zalloc |
| here in case unused entries are not reclaimed before the |
| section's contents are written out. This should not happen, |
| but this way if it does we get a R_PPC64_NONE reloc in .rela |
| sections instead of garbage. |
| We also rely on the section contents being zero when writing |
| the GOT. */ |
| s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
| if (s->contents == NULL) |
| return FALSE; |
| } |
| |
| if (htab->elf.dynamic_sections_created) |
| { |
| /* Add some entries to the .dynamic section. We fill in the |
| values later, in ppc64_elf_finish_dynamic_sections, but we |
| must add the entries now so that we get the correct size for |
| the .dynamic section. The DT_DEBUG entry is filled in by the |
| dynamic linker and used by the debugger. */ |
| #define add_dynamic_entry(TAG, VAL) \ |
| bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) |
| |
| if (info->executable) |
| { |
| if (!add_dynamic_entry (DT_DEBUG, 0)) |
| return FALSE; |
| } |
| |
| if (htab->splt != NULL && htab->splt->_raw_size != 0) |
| { |
| if (!add_dynamic_entry (DT_PLTGOT, 0) |
| || !add_dynamic_entry (DT_PLTRELSZ, 0) |
| || !add_dynamic_entry (DT_PLTREL, DT_RELA) |
| || !add_dynamic_entry (DT_JMPREL, 0) |
| || !add_dynamic_entry (DT_PPC64_GLINK, 0)) |
| return FALSE; |
| } |
| |
| if (NO_OPD_RELOCS) |
| { |
| if (!add_dynamic_entry (DT_PPC64_OPD, 0) |
| || !add_dynamic_entry (DT_PPC64_OPDSZ, 0)) |
| return FALSE; |
| } |
| |
| if (relocs) |
| { |
| if (!add_dynamic_entry (DT_RELA, 0) |
| || !add_dynamic_entry (DT_RELASZ, 0) |
| || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) |
| return FALSE; |
| |
| /* If any dynamic relocs apply to a read-only section, |
| then we need a DT_TEXTREL entry. */ |
| if ((info->flags & DF_TEXTREL) == 0) |
| elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, |
| (PTR) info); |
| |
| if ((info->flags & DF_TEXTREL) != 0) |
| { |
| if (!add_dynamic_entry (DT_TEXTREL, 0)) |
| return FALSE; |
| } |
| } |
| } |
| #undef add_dynamic_entry |
| |
| return TRUE; |
| } |
| |
| /* Determine the type of stub needed, if any, for a call. */ |
| |
| static INLINE enum ppc_stub_type |
| ppc_type_of_stub (input_sec, rel, hash, destination) |
| asection *input_sec; |
| const Elf_Internal_Rela *rel; |
| struct ppc_link_hash_entry **hash; |
| bfd_vma destination; |
| { |
| struct ppc_link_hash_entry *h = *hash; |
| bfd_vma location; |
| bfd_vma branch_offset; |
| bfd_vma max_branch_offset; |
| unsigned int r_type; |
| |
| if (h != NULL) |
| { |
| if (h->oh != NULL |
| && h->oh->dynindx != -1) |
| { |
| struct plt_entry *ent; |
| for (ent = h->oh->plt.plist; ent != NULL; ent = ent->next) |
| if (ent->addend == rel->r_addend |
| && ent->plt.offset != (bfd_vma) -1) |
| { |
| *hash = (struct ppc_link_hash_entry *) h->oh; |
| return ppc_stub_plt_call; |
| } |
| } |
| |
| if (h->elf.root.type != bfd_link_hash_defined |
| && h->elf.root.type != bfd_link_hash_defweak) |
| return ppc_stub_none; |
| } |
| |
| /* Determine where the call point is. */ |
| location = (input_sec->output_offset |
| + input_sec->output_section->vma |
| + rel->r_offset); |
| |
| branch_offset = destination - location; |
| r_type = ELF64_R_TYPE (rel->r_info); |
| |
| /* Determine if a long branch stub is needed. */ |
| max_branch_offset = 1 << 25; |
| if (r_type != (unsigned int) R_PPC64_REL24) |
| max_branch_offset = 1 << 15; |
| |
| if (branch_offset + max_branch_offset >= 2 * max_branch_offset) |
| /* We need a stub. Figure out whether a long_branch or plt_branch |
| is needed later. */ |
| return ppc_stub_long_branch; |
| |
| return ppc_stub_none; |
| } |
| |
| /* Build a .plt call stub. */ |
| |
| static bfd_byte * |
| build_plt_stub (obfd, p, offset) |
| bfd *obfd; |
| bfd_byte *p; |
| int offset; |
| { |
| #define PPC_LO(v) ((v) & 0xffff) |
| #define PPC_HI(v) (((v) >> 16) & 0xffff) |
| #define PPC_HA(v) PPC_HI ((v) + 0x8000) |
| |
| bfd_put_32 (obfd, ADDIS_R12_R2 | PPC_HA (offset), p), p += 4; |
| bfd_put_32 (obfd, STD_R2_40R1, p), p += 4; |
| bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4; |
| if (PPC_HA (offset + 8) != PPC_HA (offset)) |
| bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4; |
| offset += 8; |
| bfd_put_32 (obfd, LD_R2_0R12 | PPC_LO (offset), p), p += 4; |
| if (PPC_HA (offset + 8) != PPC_HA (offset)) |
| bfd_put_32 (obfd, ADDIS_R12_R12 | 1, p), p += 4; |
| offset += 8; |
| bfd_put_32 (obfd, MTCTR_R11, p), p += 4; |
| bfd_put_32 (obfd, LD_R11_0R12 | PPC_LO (offset), p), p += 4; |
| bfd_put_32 (obfd, BCTR, p), p += 4; |
| return p; |
| } |
| |
| static bfd_boolean |
| ppc_build_one_stub (gen_entry, in_arg) |
| struct bfd_hash_entry *gen_entry; |
| PTR in_arg; |
| { |
| struct ppc_stub_hash_entry *stub_entry; |
| struct ppc_branch_hash_entry *br_entry; |
| struct bfd_link_info *info; |
| struct ppc_link_hash_table *htab; |
| asection *stub_sec; |
| bfd *stub_bfd; |
| bfd_byte *loc; |
| bfd_byte *p; |
| unsigned int indx; |
| struct plt_entry *ent; |
| bfd_vma off; |
| int size; |
| |
| /* Massage our args to the form they really have. */ |
| stub_entry = (struct ppc_stub_hash_entry *) gen_entry; |
| info = (struct bfd_link_info *) in_arg; |
| |
| htab = ppc_hash_table (info); |
| stub_sec = stub_entry->stub_sec; |
| |
| /* Make a note of the offset within the stubs for this entry. */ |
| stub_entry->stub_offset = stub_sec->_cooked_size; |
| loc = stub_sec->contents + stub_entry->stub_offset; |
| |
| if (htab->emit_stub_syms) |
| { |
| struct elf_link_hash_entry *h; |
| h = elf_link_hash_lookup (&htab->elf, stub_entry->root.string, |
| TRUE, FALSE, FALSE); |
| if (h == NULL) |
| return FALSE; |
| h->root.type = bfd_link_hash_defined; |
| h->root.u.def.section = stub_entry->stub_sec; |
| h->root.u.def.value = stub_entry->stub_offset; |
| h->elf_link_hash_flags = (ELF_LINK_HASH_REF_REGULAR |
| | ELF_LINK_HASH_DEF_REGULAR |
| | ELF_LINK_HASH_REF_REGULAR_NONWEAK |
| | ELF_LINK_FORCED_LOCAL); |
| } |
| |
| stub_bfd = stub_sec->owner; |
| |
| switch (stub_entry->stub_type) |
| { |
| case ppc_stub_long_branch: |
| case ppc_stub_long_branch_r2off: |
| /* Branches are relative. This is where we are going to. */ |
| off = (stub_entry->target_value |
| + stub_entry->target_section->output_offset |
| + stub_entry->target_section->output_section->vma); |
| |
| /* And this is where we are coming from. */ |
| off -= (stub_entry->stub_offset |
| + stub_sec->output_offset |
| + stub_sec->output_section->vma); |
| |
| if (stub_entry->stub_type != ppc_stub_long_branch_r2off) |
| size = 4; |
| else |
| { |
| bfd_vma r2off; |
| |
| r2off = (htab->stub_group[stub_entry->target_section->id].toc_off |
| - htab->stub_group[stub_entry->id_sec->id].toc_off); |
| bfd_put_32 (stub_bfd, (bfd_vma) STD_R2_40R1, loc); |
| loc += 4; |
| bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R2_R2 | PPC_HA (r2off), loc); |
| loc += 4; |
| bfd_put_32 (stub_bfd, (bfd_vma) ADDI_R2_R2 | PPC_LO (r2off), loc); |
| loc += 4; |
| off -= 12; |
| size = 16; |
| } |
| bfd_put_32 (stub_bfd, (bfd_vma) B_DOT | (off & 0x3fffffc), loc); |
| |
| BFD_ASSERT (off + (1 << 25) < (bfd_vma) (1 << 26)); |
| break; |
| |
| case ppc_stub_plt_branch: |
| case ppc_stub_plt_branch_r2off: |
| br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, |
| stub_entry->root.string + 9, |
| FALSE, FALSE); |
| if (br_entry == NULL) |
| { |
| (*_bfd_error_handler) (_("can't find branch stub `%s'"), |
| stub_entry->root.string + 9); |
| htab->stub_error = TRUE; |
| return FALSE; |
| } |
| |
| off = (stub_entry->target_value |
| + stub_entry->target_section->output_offset |
| + stub_entry->target_section->output_section->vma); |
| |
| bfd_put_64 (htab->sbrlt->owner, off, |
| htab->sbrlt->contents + br_entry->offset); |
| |
| if (info->shared) |
| { |
| /* Create a reloc for the branch lookup table entry. */ |
| Elf_Internal_Rela rela; |
| bfd_byte *rl; |
| |
| rela.r_offset = (br_entry->offset |
| + htab->sbrlt->output_offset |
| + htab->sbrlt->output_section->vma); |
| rela.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| rela.r_addend = off; |
| |
| rl = htab->srelbrlt->contents; |
| rl += htab->srelbrlt->reloc_count++ * sizeof (Elf64_External_Rela); |
| bfd_elf64_swap_reloca_out (htab->srelbrlt->owner, &rela, rl); |
| } |
| |
| off = (br_entry->offset |
| + htab->sbrlt->output_offset |
| + htab->sbrlt->output_section->vma |
| - elf_gp (htab->sbrlt->output_section->owner) |
| - htab->stub_group[stub_entry->id_sec->id].toc_off); |
| |
| if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
| { |
| (*_bfd_error_handler) |
| (_("linkage table error against `%s'"), |
| stub_entry->root.string); |
| bfd_set_error (bfd_error_bad_value); |
| htab->stub_error = TRUE; |
| return FALSE; |
| } |
| |
| indx = off; |
| if (stub_entry->stub_type != ppc_stub_plt_branch_r2off) |
| { |
| bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc); |
| loc += 4; |
| bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc); |
| size = 16; |
| } |
| else |
| { |
| bfd_vma r2off; |
| |
| r2off = (htab->stub_group[stub_entry->target_section->id].toc_off |
| - htab->stub_group[stub_entry->id_sec->id].toc_off); |
| bfd_put_32 (stub_bfd, (bfd_vma) STD_R2_40R1, loc); |
| loc += 4; |
| bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R12_R2 | PPC_HA (indx), loc); |
| loc += 4; |
| bfd_put_32 (stub_bfd, (bfd_vma) LD_R11_0R12 | PPC_LO (indx), loc); |
| loc += 4; |
| bfd_put_32 (stub_bfd, (bfd_vma) ADDIS_R2_R2 | PPC_HA (r2off), loc); |
| loc += 4; |
| bfd_put_32 (stub_bfd, (bfd_vma) ADDI_R2_R2 | PPC_LO (r2off), loc); |
| size = 28; |
| } |
| loc += 4; |
| bfd_put_32 (stub_bfd, (bfd_vma) MTCTR_R11, loc); |
| loc += 4; |
| bfd_put_32 (stub_bfd, (bfd_vma) BCTR, loc); |
| break; |
| |
| case ppc_stub_plt_call: |
| /* Do the best we can for shared libraries built without |
| exporting ".foo" for each "foo". This can happen when symbol |
| versioning scripts strip all bar a subset of symbols. */ |
| if (stub_entry->h->oh->root.type != bfd_link_hash_defined |
| && stub_entry->h->oh->root.type != bfd_link_hash_defweak) |
| { |
| /* Point the symbol at the stub. There may be multiple stubs, |
| we don't really care; The main thing is to make this sym |
| defined somewhere. */ |
| stub_entry->h->oh->root.type = bfd_link_hash_defined; |
| stub_entry->h->oh->root.u.def.section = stub_entry->stub_sec; |
| stub_entry->h->oh->root.u.def.value = stub_entry->stub_offset; |
| } |
| |
| /* Now build the stub. */ |
| off = (bfd_vma) -1; |
| for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next) |
| if (ent->addend == stub_entry->addend) |
| { |
| off = ent->plt.offset; |
| break; |
| } |
| if (off >= (bfd_vma) -2) |
| abort (); |
| |
| off &= ~ (bfd_vma) 1; |
| off += (htab->splt->output_offset |
| + htab->splt->output_section->vma |
| - elf_gp (htab->splt->output_section->owner) |
| - htab->stub_group[stub_entry->id_sec->id].toc_off); |
| |
| if (off + 0x80008000 > 0xffffffff || (off & 7) != 0) |
| { |
| (*_bfd_error_handler) |
| (_("linkage table error against `%s'"), |
| stub_entry->h->elf.root.root.string); |
| bfd_set_error (bfd_error_bad_value); |
| htab->stub_error = TRUE; |
| return FALSE; |
| } |
| |
| p = build_plt_stub (stub_bfd, loc, (int) off); |
| size = p - loc; |
| break; |
| |
| default: |
| BFD_FAIL (); |
| return FALSE; |
| } |
| |
| stub_sec->_cooked_size += size; |
| return TRUE; |
| } |
| |
| /* As above, but don't actually build the stub. Just bump offset so |
| we know stub section sizes, and select plt_branch stubs where |
| long_branch stubs won't do. */ |
| |
| static bfd_boolean |
| ppc_size_one_stub (gen_entry, in_arg) |
| struct bfd_hash_entry *gen_entry; |
| PTR in_arg; |
| { |
| struct ppc_stub_hash_entry *stub_entry; |
| struct ppc_link_hash_table *htab; |
| bfd_vma off; |
| int size; |
| |
| /* Massage our args to the form they really have. */ |
| stub_entry = (struct ppc_stub_hash_entry *) gen_entry; |
| htab = (struct ppc_link_hash_table *) in_arg; |
| |
| if (stub_entry->stub_type == ppc_stub_plt_call) |
| { |
| struct plt_entry *ent; |
| off = (bfd_vma) -1; |
| for (ent = stub_entry->h->elf.plt.plist; ent != NULL; ent = ent->next) |
| if (ent->addend == stub_entry->addend) |
| { |
| off = ent->plt.offset & ~(bfd_vma) 1; |
| break; |
| } |
| if (off >= (bfd_vma) -2) |
| abort (); |
| off += (htab->splt->output_offset |
| + htab->splt->output_section->vma |
| - elf_gp (htab->splt->output_section->owner) |
| - htab->stub_group[stub_entry->id_sec->id].toc_off); |
| |
| size = PLT_CALL_STUB_SIZE; |
| if (PPC_HA ((int) off + 16) != PPC_HA ((int) off)) |
| size += 4; |
| } |
| else |
| { |
| /* ppc_stub_long_branch or ppc_stub_plt_branch, or their r2off |
| variants. */ |
| off = (stub_entry->target_value |
| + stub_entry->target_section->output_offset |
| + stub_entry->target_section->output_section->vma); |
| off -= (stub_entry->stub_sec->_raw_size |
| + stub_entry->stub_sec->output_offset |
| + stub_entry->stub_sec->output_section->vma); |
| |
| /* Reset the stub type from the plt variant in case we now |
| can reach with a shorter stub. */ |
| if (stub_entry->stub_type >= ppc_stub_plt_branch) |
| stub_entry->stub_type += ppc_stub_long_branch - ppc_stub_plt_branch; |
| |
| size = 4; |
| if (stub_entry->stub_type == ppc_stub_long_branch_r2off) |
| { |
| off -= 12; |
| size = 16; |
| } |
| |
| /* If the branch offset if too big, use a ppc_stub_plt_branch. */ |
| if (off + (1 << 25) >= (bfd_vma) (1 << 26)) |
| { |
| struct ppc_branch_hash_entry *br_entry; |
| |
| br_entry = ppc_branch_hash_lookup (&htab->branch_hash_table, |
| stub_entry->root.string + 9, |
| TRUE, FALSE); |
| if (br_entry == NULL) |
| { |
| (*_bfd_error_handler) (_("can't build branch stub `%s'"), |
| stub_entry->root.string + 9); |
| htab->stub_error = TRUE; |
| return FALSE; |
| } |
| |
| if (br_entry->iter != htab->stub_iteration) |
| { |
| br_entry->iter = htab->stub_iteration; |
| br_entry->offset = htab->sbrlt->_raw_size; |
| htab->sbrlt->_raw_size += 8; |
| } |
| |
| stub_entry->stub_type += ppc_stub_plt_branch - ppc_stub_long_branch; |
| size = 16; |
| if (stub_entry->stub_type != ppc_stub_plt_branch) |
| size = 28; |
| } |
| } |
| |
| stub_entry->stub_sec->_raw_size += size; |
| return TRUE; |
| } |
| |
| /* Set up various things so that we can make a list of input sections |
| for each output section included in the link. Returns -1 on error, |
| 0 when no stubs will be needed, and 1 on success. */ |
| |
| int |
| ppc64_elf_setup_section_lists (output_bfd, info) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| { |
| bfd *input_bfd; |
| int top_id, top_index; |
| asection *section; |
| asection **input_list, **list; |
| bfd_size_type amt; |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| |
| if (htab->sbrlt == NULL) |
| return 0; |
| |
| /* Find the top input section id. */ |
| for (input_bfd = info->input_bfds, top_id = 0; |
| input_bfd != NULL; |
| input_bfd = input_bfd->link_next) |
| { |
| for (section = input_bfd->sections; |
| section != NULL; |
| section = section->next) |
| { |
| if (top_id < section->id) |
| top_id = section->id; |
| } |
| } |
| |
| amt = sizeof (struct map_stub) * (top_id + 1); |
| htab->stub_group = (struct map_stub *) bfd_zmalloc (amt); |
| if (htab->stub_group == NULL) |
| return -1; |
| |
| elf_gp (output_bfd) = htab->toc_curr = ppc64_elf_toc (output_bfd); |
| |
| /* We can't use output_bfd->section_count here to find the top output |
| section index as some sections may have been removed, and |
| _bfd_strip_section_from_output doesn't renumber the indices. */ |
| for (section = output_bfd->sections, top_index = 0; |
| section != NULL; |
| section = section->next) |
| { |
| if (top_index < section->index) |
| top_index = section->index; |
| } |
| |
| htab->top_index = top_index; |
| amt = sizeof (asection *) * (top_index + 1); |
| input_list = (asection **) bfd_malloc (amt); |
| htab->input_list = input_list; |
| if (input_list == NULL) |
| return -1; |
| |
| /* For sections we aren't interested in, mark their entries with a |
| value we can check later. */ |
| list = input_list + top_index; |
| do |
| *list = bfd_abs_section_ptr; |
| while (list-- != input_list); |
| |
| for (section = output_bfd->sections; |
| section != NULL; |
| section = section->next) |
| { |
| if ((section->flags & SEC_CODE) != 0) |
| input_list[section->index] = NULL; |
| } |
| |
| return 1; |
| } |
| |
| /* The linker repeatedly calls this function for each toc input |
| section. Group input bfds such that the toc within a group |
| is less than 64k in size. Will break with cute linker scripts |
| that play games with dot in the output toc section. */ |
| |
| void |
| ppc64_elf_next_toc_section (info, isec) |
| struct bfd_link_info *info; |
| asection *isec; |
| { |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| |
| if (!htab->no_multi_toc) |
| { |
| bfd_vma addr = isec->output_offset + isec->output_section->vma; |
| bfd_vma off = addr - htab->toc_curr; |
| if (off + isec->_raw_size > 0x10000) |
| { |
| htab->toc_curr = addr; |
| htab->multi_toc_needed = 1; |
| } |
| elf_gp (isec->owner) = (htab->toc_curr |
| - elf_gp (isec->output_section->owner) |
| + TOC_BASE_OFF); |
| } |
| } |
| |
| /* Called after the last call to the above function. */ |
| |
| void |
| ppc64_elf_reinit_toc (output_bfd, info) |
| bfd *output_bfd ATTRIBUTE_UNUSED; |
| struct bfd_link_info *info; |
| { |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| bfd *ibfd; |
| bfd_vma curr; |
| |
| /* toc_curr tracks the TOC offset used for code sections below in |
| ppc64_elf_next_input_section. Start off at 0x8000. */ |
| htab->toc_curr = curr = TOC_BASE_OFF; |
| |
| /* Set the TOC base in all input bfds. Some may not have a TOC |
| section and thus not be set in ppc64_elf_next_toc_section. */ |
| for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) |
| { |
| if (elf_gp (ibfd) == 0) |
| elf_gp (ibfd) = curr; |
| else |
| curr = elf_gp (ibfd); |
| } |
| } |
| |
| /* The linker repeatedly calls this function for each input section, |
| in the order that input sections are linked into output sections. |
| Build lists of input sections to determine groupings between which |
| we may insert linker stubs. */ |
| |
| void |
| ppc64_elf_next_input_section (info, isec) |
| struct bfd_link_info *info; |
| asection *isec; |
| { |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| |
| if (isec->output_section->index <= htab->top_index) |
| { |
| asection **list = htab->input_list + isec->output_section->index; |
| if (*list != bfd_abs_section_ptr) |
| { |
| /* Steal the link_sec pointer for our list. */ |
| #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec) |
| /* This happens to make the list in reverse order, |
| which is what we want. */ |
| PREV_SEC (isec) = *list; |
| *list = isec; |
| } |
| } |
| |
| /* If a code section has a function that uses the TOC then we need |
| to use the right TOC (obviously). Also, make sure that .opd gets |
| the correct TOC value. */ |
| if (isec->has_gp_reloc || (isec->flags & SEC_CODE) == 0) |
| htab->toc_curr = elf_gp (isec->owner); |
| |
| /* Functions that don't use the TOC can belong in any TOC group. |
| Use the last TOC base. This happens to make _init and _fini |
| pasting work. */ |
| htab->stub_group[isec->id].toc_off = htab->toc_curr; |
| } |
| |
| /* See whether we can group stub sections together. Grouping stub |
| sections may result in fewer stubs. More importantly, we need to |
| put all .init* and .fini* stubs at the beginning of the .init or |
| .fini output sections respectively, because glibc splits the |
| _init and _fini functions into multiple parts. Putting a stub in |
| the middle of a function is not a good idea. */ |
| |
| static void |
| group_sections (htab, stub_group_size, stubs_always_before_branch) |
| struct ppc_link_hash_table *htab; |
| bfd_size_type stub_group_size; |
| bfd_boolean stubs_always_before_branch; |
| { |
| asection **list = htab->input_list + htab->top_index; |
| do |
| { |
| asection *tail = *list; |
| if (tail == bfd_abs_section_ptr) |
| continue; |
| while (tail != NULL) |
| { |
| asection *curr; |
| asection *prev; |
| bfd_size_type total; |
| bfd_boolean big_sec; |
| bfd_vma curr_toc; |
| |
| curr = tail; |
| if (tail->_cooked_size) |
| total = tail->_cooked_size; |
| else |
| total = tail->_raw_size; |
| big_sec = total >= stub_group_size; |
| curr_toc = htab->stub_group[tail->id].toc_off; |
| |
| while ((prev = PREV_SEC (curr)) != NULL |
| && ((total += curr->output_offset - prev->output_offset) |
| < stub_group_size) |
| && htab->stub_group[prev->id].toc_off == curr_toc) |
| curr = prev; |
| |
| /* OK, the size from the start of CURR to the end is less |
| than stub_group_size and thus can be handled by one stub |
| section. (or the tail section is itself larger than |
| stub_group_size, in which case we may be toast.) We |
| should really be keeping track of the total size of stubs |
| added here, as stubs contribute to the final output |
| section size. That's a little tricky, and this way will |
| only break if stubs added make the total size more than |
| 2^25, ie. for the default stub_group_size, if stubs total |
| more than 2097152 bytes, or nearly 75000 plt call stubs. */ |
| do |
| { |
| prev = PREV_SEC (tail); |
| /* Set up this stub group. */ |
| htab->stub_group[tail->id].link_sec = curr; |
| } |
| while (tail != curr && (tail = prev) != NULL); |
| |
| /* But wait, there's more! Input sections up to stub_group_size |
| bytes before the stub section can be handled by it too. |
| Don't do this if we have a really large section after the |
| stubs, as adding more stubs increases the chance that |
| branches may not reach into the stub section. */ |
| if (!stubs_always_before_branch && !big_sec) |
| { |
| total = 0; |
| while (prev != NULL |
| && ((total += tail->output_offset - prev->output_offset) |
| < stub_group_size) |
| && htab->stub_group[prev->id].toc_off == curr_toc) |
| { |
| tail = prev; |
| prev = PREV_SEC (tail); |
| htab->stub_group[tail->id].link_sec = curr; |
| } |
| } |
| tail = prev; |
| } |
| } |
| while (list-- != htab->input_list); |
| free (htab->input_list); |
| #undef PREV_SEC |
| } |
| |
| /* Determine and set the size of the stub section for a final link. |
| |
| The basic idea here is to examine all the relocations looking for |
| PC-relative calls to a target that is unreachable with a "bl" |
| instruction. */ |
| |
| bfd_boolean |
| ppc64_elf_size_stubs (output_bfd, stub_bfd, info, group_size, |
| add_stub_section, layout_sections_again) |
| bfd *output_bfd; |
| bfd *stub_bfd; |
| struct bfd_link_info *info; |
| bfd_signed_vma group_size; |
| asection * (*add_stub_section) PARAMS ((const char *, asection *)); |
| void (*layout_sections_again) PARAMS ((void)); |
| { |
| bfd_size_type stub_group_size; |
| bfd_boolean stubs_always_before_branch; |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| |
| /* Stash our params away. */ |
| htab->stub_bfd = stub_bfd; |
| htab->add_stub_section = add_stub_section; |
| htab->layout_sections_again = layout_sections_again; |
| stubs_always_before_branch = group_size < 0; |
| if (group_size < 0) |
| stub_group_size = -group_size; |
| else |
| stub_group_size = group_size; |
| if (stub_group_size == 1) |
| { |
| /* Default values. */ |
| if (stubs_always_before_branch) |
| { |
| stub_group_size = 0x1e00000; |
| if (htab->has_14bit_branch) |
| stub_group_size = 0x7800; |
| } |
| else |
| { |
| stub_group_size = 0x1c00000; |
| if (htab->has_14bit_branch) |
| stub_group_size = 0x7000; |
| } |
| } |
| |
| group_sections (htab, stub_group_size, stubs_always_before_branch); |
| |
| while (1) |
| { |
| bfd *input_bfd; |
| unsigned int bfd_indx; |
| asection *stub_sec; |
| bfd_boolean stub_changed; |
| |
| htab->stub_iteration += 1; |
| stub_changed = FALSE; |
| |
| for (input_bfd = info->input_bfds, bfd_indx = 0; |
| input_bfd != NULL; |
| input_bfd = input_bfd->link_next, bfd_indx++) |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| asection *section; |
| Elf_Internal_Sym *local_syms = NULL; |
| |
| /* We'll need the symbol table in a second. */ |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| if (symtab_hdr->sh_info == 0) |
| continue; |
| |
| /* Walk over each section attached to the input bfd. */ |
| for (section = input_bfd->sections; |
| section != NULL; |
| section = section->next) |
| { |
| Elf_Internal_Rela *internal_relocs, *irelaend, *irela; |
| |
| /* If there aren't any relocs, then there's nothing more |
| to do. */ |
| if ((section->flags & SEC_RELOC) == 0 |
| || section->reloc_count == 0) |
| continue; |
| |
| /* If this section is a link-once section that will be |
| discarded, then don't create any stubs. */ |
| if (section->output_section == NULL |
| || section->output_section->owner != output_bfd) |
| continue; |
| |
| /* Get the relocs. */ |
| internal_relocs |
| = _bfd_elf_link_read_relocs (input_bfd, section, NULL, |
| (Elf_Internal_Rela *) NULL, |
| info->keep_memory); |
| if (internal_relocs == NULL) |
| goto error_ret_free_local; |
| |
| /* Now examine each relocation. */ |
| irela = internal_relocs; |
| irelaend = irela + section->reloc_count; |
| for (; irela < irelaend; irela++) |
| { |
| unsigned int r_type, r_indx; |
| enum ppc_stub_type stub_type; |
| struct ppc_stub_hash_entry *stub_entry; |
| asection *sym_sec; |
| bfd_vma sym_value; |
| bfd_vma destination; |
| struct ppc_link_hash_entry *hash; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| char *stub_name; |
| const asection *id_sec; |
| |
| r_type = ELF64_R_TYPE (irela->r_info); |
| r_indx = ELF64_R_SYM (irela->r_info); |
| |
| if (r_type >= (unsigned int) R_PPC64_max) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| goto error_ret_free_internal; |
| } |
| |
| /* Only look for stubs on branch instructions. */ |
| if (r_type != (unsigned int) R_PPC64_REL24 |
| && r_type != (unsigned int) R_PPC64_REL14 |
| && r_type != (unsigned int) R_PPC64_REL14_BRTAKEN |
| && r_type != (unsigned int) R_PPC64_REL14_BRNTAKEN) |
| continue; |
| |
| /* Now determine the call target, its name, value, |
| section. */ |
| destination = 0; |
| if (!get_sym_h (&h, &sym, &sym_sec, NULL, &local_syms, |
| r_indx, input_bfd)) |
| goto error_ret_free_internal; |
| hash = (struct ppc_link_hash_entry *) h; |
| |
| if (hash == NULL) |
| { |
| /* It's a local symbol. */ |
| sym_value = sym->st_value; |
| destination = (sym_value + irela->r_addend |
| + sym_sec->output_offset |
| + sym_sec->output_section->vma); |
| } |
| else |
| { |
| /* It's an external symbol. */ |
| sym_value = 0; |
| if (hash->elf.root.type == bfd_link_hash_defined |
| || hash->elf.root.type == bfd_link_hash_defweak) |
| { |
| sym_value = hash->elf.root.u.def.value; |
| if (sym_sec->output_section != NULL) |
| destination = (sym_value + irela->r_addend |
| + sym_sec->output_offset |
| + sym_sec->output_section->vma); |
| } |
| else if (hash->elf.root.type == bfd_link_hash_undefweak) |
| ; |
| else if (hash->elf.root.type == bfd_link_hash_undefined) |
| ; |
| else |
| { |
| bfd_set_error (bfd_error_bad_value); |
| goto error_ret_free_internal; |
| } |
| } |
| |
| /* Determine what (if any) linker stub is needed. */ |
| stub_type = ppc_type_of_stub (section, irela, &hash, |
| destination); |
| |
| if (stub_type != ppc_stub_plt_call) |
| { |
| /* Check whether we need a TOC adjusting stub. |
| Since the linker pastes together pieces from |
| different object files when creating the |
| _init and _fini functions, it may be that a |
| call to what looks like a local sym is in |
| fact a call needing a TOC adjustment. */ |
| if (sym_sec != NULL |
| && sym_sec->output_section != NULL |
| && (htab->stub_group[sym_sec->id].toc_off |
| != htab->stub_group[section->id].toc_off)) |
| stub_type = ppc_stub_long_branch_r2off; |
| } |
| |
| if (stub_type == ppc_stub_none) |
| continue; |
| |
| /* __tls_get_addr calls might be eliminated. */ |
| if (stub_type != ppc_stub_plt_call |
| && hash != NULL |
| && &hash->elf == htab->tls_get_addr |
| && section->has_tls_reloc |
| && irela != internal_relocs) |
| { |
| /* Get tls info. */ |
| char *tls_mask; |
| |
| if (!get_tls_mask (&tls_mask, &local_syms, |
| irela - 1, input_bfd)) |
| goto error_ret_free_internal; |
| if (*tls_mask != 0) |
| continue; |
| } |
| |
| /* Support for grouping stub sections. */ |
| id_sec = htab->stub_group[section->id].link_sec; |
| |
| /* Get the name of this stub. */ |
| stub_name = ppc_stub_name (id_sec, sym_sec, hash, irela); |
| if (!stub_name) |
| goto error_ret_free_internal; |
| |
| stub_entry = ppc_stub_hash_lookup (&htab->stub_hash_table, |
| stub_name, FALSE, FALSE); |
| if (stub_entry != NULL) |
| { |
| /* The proper stub has already been created. */ |
| free (stub_name); |
| continue; |
| } |
| |
| stub_entry = ppc_add_stub (stub_name, section, htab); |
| if (stub_entry == NULL) |
| { |
| free (stub_name); |
| error_ret_free_internal: |
| if (elf_section_data (section)->relocs == NULL) |
| free (internal_relocs); |
| error_ret_free_local: |
| if (local_syms != NULL |
| && (symtab_hdr->contents |
| != (unsigned char *) local_syms)) |
| free (local_syms); |
| return FALSE; |
| } |
| |
| stub_entry->stub_type = stub_type; |
| stub_entry->target_value = sym_value; |
| stub_entry->target_section = sym_sec; |
| stub_entry->h = hash; |
| stub_entry->addend = irela->r_addend; |
| stub_changed = TRUE; |
| } |
| |
| /* We're done with the internal relocs, free them. */ |
| if (elf_section_data (section)->relocs != internal_relocs) |
| free (internal_relocs); |
| } |
| |
| if (local_syms != NULL |
| && symtab_hdr->contents != (unsigned char *) local_syms) |
| { |
| if (!info->keep_memory) |
| free (local_syms); |
| else |
| symtab_hdr->contents = (unsigned char *) local_syms; |
| } |
| } |
| |
| if (!stub_changed) |
| break; |
| |
| /* OK, we've added some stubs. Find out the new size of the |
| stub sections. */ |
| for (stub_sec = htab->stub_bfd->sections; |
| stub_sec != NULL; |
| stub_sec = stub_sec->next) |
| { |
| stub_sec->_raw_size = 0; |
| stub_sec->_cooked_size = 0; |
| } |
| htab->sbrlt->_raw_size = 0; |
| htab->sbrlt->_cooked_size = 0; |
| |
| bfd_hash_traverse (&htab->stub_hash_table, ppc_size_one_stub, htab); |
| |
| /* Ask the linker to do its stuff. */ |
| (*htab->layout_sections_again) (); |
| } |
| |
| /* It would be nice to strip .branch_lt from the output if the |
| section is empty, but it's too late. If we strip sections here, |
| the dynamic symbol table is corrupted since the section symbol |
| for the stripped section isn't written. */ |
| |
| return TRUE; |
| } |
| |
| /* Called after we have determined section placement. If sections |
| move, we'll be called again. Provide a value for TOCstart. */ |
| |
| bfd_vma |
| ppc64_elf_toc (obfd) |
| bfd *obfd; |
| { |
| asection *s; |
| bfd_vma TOCstart; |
| |
| /* The TOC consists of sections .got, .toc, .tocbss, .plt in that |
| order. The TOC starts where the first of these sections starts. */ |
| s = bfd_get_section_by_name (obfd, ".got"); |
| if (s == NULL) |
| s = bfd_get_section_by_name (obfd, ".toc"); |
| if (s == NULL) |
| s = bfd_get_section_by_name (obfd, ".tocbss"); |
| if (s == NULL) |
| s = bfd_get_section_by_name (obfd, ".plt"); |
| if (s == NULL) |
| { |
| /* This may happen for |
| o references to TOC base (SYM@toc / TOC[tc0]) without a |
| .toc directive |
| o bad linker script |
| o --gc-sections and empty TOC sections |
| |
| FIXME: Warn user? */ |
| |
| /* Look for a likely section. We probably won't even be |
| using TOCstart. */ |
| for (s = obfd->sections; s != NULL; s = s->next) |
| if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA | SEC_READONLY)) |
| == (SEC_ALLOC | SEC_SMALL_DATA)) |
| break; |
| if (s == NULL) |
| for (s = obfd->sections; s != NULL; s = s->next) |
| if ((s->flags & (SEC_ALLOC | SEC_SMALL_DATA)) |
| == (SEC_ALLOC | SEC_SMALL_DATA)) |
| break; |
| if (s == NULL) |
| for (s = obfd->sections; s != NULL; s = s->next) |
| if ((s->flags & (SEC_ALLOC | SEC_READONLY)) == SEC_ALLOC) |
| break; |
| if (s == NULL) |
| for (s = obfd->sections; s != NULL; s = s->next) |
| if ((s->flags & SEC_ALLOC) == SEC_ALLOC) |
| break; |
| } |
| |
| TOCstart = 0; |
| if (s != NULL) |
| TOCstart = s->output_section->vma + s->output_offset; |
| |
| return TOCstart; |
| } |
| |
| /* Build all the stubs associated with the current output file. |
| The stubs are kept in a hash table attached to the main linker |
| hash table. This function is called via gldelf64ppc_finish. */ |
| |
| bfd_boolean |
| ppc64_elf_build_stubs (emit_stub_syms, info) |
| bfd_boolean emit_stub_syms; |
| struct bfd_link_info *info; |
| { |
| struct ppc_link_hash_table *htab = ppc_hash_table (info); |
| asection *stub_sec; |
| bfd_byte *p; |
| |
| htab->emit_stub_syms = emit_stub_syms; |
| for (stub_sec = htab->stub_bfd->sections; |
| stub_sec != NULL; |
| stub_sec = stub_sec->next) |
| { |
| bfd_size_type size; |
| |
| /* Allocate memory to hold the linker stubs. */ |
| size = stub_sec->_raw_size; |
| if (size != 0) |
| { |
| stub_sec->contents = (bfd_byte *) bfd_zalloc (htab->stub_bfd, size); |
| if (stub_sec->contents == NULL) |
| return FALSE; |
| } |
| stub_sec->_cooked_size = 0; |
| } |
| |
| if (htab->splt != NULL) |
| { |
| unsigned int indx; |
| bfd_vma plt0; |
| |
| /* Build the .glink plt call stub. */ |
| plt0 = (htab->splt->output_section->vma |
| + htab->splt->output_offset |
| - (htab->sglink->output_section->vma |
| + htab->sglink->output_offset |
| + GLINK_CALL_STUB_SIZE)); |
| if (plt0 + 0x80008000 > 0xffffffff) |
| { |
| (*_bfd_error_handler) (_(".glink and .plt too far apart")); |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| } |
| |
| p = htab->sglink->contents; |
| bfd_put_32 (htab->sglink->owner, MFCTR_R12, p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, SLDI_R11_R0_3, p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, ADDIC_R2_R0_32K, p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, SUB_R12_R12_R11, p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, SRADI_R2_R2_63, p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, SLDI_R11_R0_2, p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, AND_R2_R2_R11, p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, SUB_R12_R12_R11, p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, ADD_R12_R12_R2, p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, ADDIS_R12_R12 | PPC_HA (plt0), p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, LD_R11_0R12 | PPC_LO (plt0), p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, ADDI_R12_R12 | PPC_LO (plt0), p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, LD_R2_0R12 | 8, p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, MTCTR_R11, p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, LD_R11_0R12 | 16, p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, BCTR, p); |
| p += 4; |
| |
| /* Build the .glink lazy link call stubs. */ |
| indx = 0; |
| while (p < htab->sglink->contents + htab->sglink->_raw_size) |
| { |
| if (indx < 0x8000) |
| { |
| bfd_put_32 (htab->sglink->owner, LI_R0_0 | indx, p); |
| p += 4; |
| } |
| else |
| { |
| bfd_put_32 (htab->sglink->owner, LIS_R0_0 | PPC_HI (indx), p); |
| p += 4; |
| bfd_put_32 (htab->sglink->owner, ORI_R0_R0_0 | PPC_LO (indx), p); |
| p += 4; |
| } |
| bfd_put_32 (htab->sglink->owner, |
| B_DOT | ((htab->sglink->contents - p) & 0x3fffffc), p); |
| indx++; |
| p += 4; |
| } |
| htab->sglink->_cooked_size = p - htab->sglink->contents; |
| } |
| |
| if (htab->sbrlt->_raw_size != 0) |
| { |
| htab->sbrlt->contents = (bfd_byte *) bfd_zalloc (htab->sbrlt->owner, |
| htab->sbrlt->_raw_size); |
| if (htab->sbrlt->contents == NULL) |
| return FALSE; |
| } |
| |
| /* Build the stubs as directed by the stub hash table. */ |
| bfd_hash_traverse (&htab->stub_hash_table, ppc_build_one_stub, info); |
| |
| for (stub_sec = htab->stub_bfd->sections; |
| stub_sec != NULL; |
| stub_sec = stub_sec->next) |
| { |
| if (stub_sec->_raw_size != stub_sec->_cooked_size) |
| break; |
| } |
| |
| if (stub_sec != NULL |
| || htab->sglink->_raw_size != htab->sglink->_cooked_size) |
| { |
| htab->stub_error = TRUE; |
| (*_bfd_error_handler) (_("stubs don't match calculated size")); |
| } |
| |
| return !htab->stub_error; |
| } |
| |
| /* The RELOCATE_SECTION function is called by the ELF backend linker |
| to handle the relocations for a section. |
| |
| The relocs are always passed as Rela structures; if the section |
| actually uses Rel structures, the r_addend field will always be |
| zero. |
| |
| This function is responsible for adjust the section contents as |
| necessary, and (if using Rela relocs and generating a |
| relocateable output file) adjusting the reloc addend as |
| necessary. |
| |
| This function does not have to worry about setting the reloc |
| address or the reloc symbol index. |
| |
| LOCAL_SYMS is a pointer to the swapped in local symbols. |
| |
| LOCAL_SECTIONS is an array giving the section in the input file |
| corresponding to the st_shndx field of each local symbol. |
| |
| The global hash table entry for the global symbols can be found |
| via elf_sym_hashes (input_bfd). |
| |
| When generating relocateable output, this function must handle |
| STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| going to be the section symbol corresponding to the output |
| section, which means that the addend must be adjusted |
| accordingly. */ |
| |
| static bfd_boolean |
| ppc64_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
| contents, relocs, local_syms, local_sections) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| bfd *input_bfd; |
| asection *input_section; |
| bfd_byte *contents; |
| Elf_Internal_Rela *relocs; |
| Elf_Internal_Sym *local_syms; |
| asection **local_sections; |
| { |
| struct ppc_link_hash_table *htab; |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes; |
| Elf_Internal_Rela *rel; |
| Elf_Internal_Rela *relend; |
| Elf_Internal_Rela outrel; |
| bfd_byte *loc; |
| struct got_entry **local_got_ents; |
| bfd_vma TOCstart; |
| bfd_boolean ret = TRUE; |
| bfd_boolean is_opd; |
| /* Disabled until we sort out how ld should choose 'y' vs 'at'. */ |
| bfd_boolean is_power4 = FALSE; |
| |
| if (info->relocateable) |
| return TRUE; |
| |
| /* Initialize howto table if needed. */ |
| if (!ppc64_elf_howto_table[R_PPC64_ADDR32]) |
| ppc_howto_init (); |
| |
| htab = ppc_hash_table (info); |
| local_got_ents = elf_local_got_ents (input_bfd); |
| TOCstart = elf_gp (output_bfd); |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (input_bfd); |
| is_opd = ppc64_elf_section_data (input_section)->opd.adjust != NULL; |
| |
| rel = relocs; |
| relend = relocs + input_section->reloc_count; |
| for (; rel < relend; rel++) |
| { |
| enum elf_ppc64_reloc_type r_type; |
| bfd_vma addend; |
| bfd_reloc_status_type r; |
| Elf_Internal_Sym *sym; |
| asection *sec; |
| struct elf_link_hash_entry *h; |
| struct elf_link_hash_entry *fdh; |
| const char *sym_name; |
| unsigned long r_symndx; |
| char tls_mask, tls_gd, tls_type; |
| bfd_vma relocation; |
| bfd_boolean unresolved_reloc; |
| bfd_boolean warned; |
| long insn, mask; |
| struct ppc_stub_hash_entry *stub_entry; |
| bfd_vma max_br_offset; |
| bfd_vma from; |
| |
| r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel->r_info); |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| sym = (Elf_Internal_Sym *) 0; |
| sec = (asection *) 0; |
| h = (struct elf_link_hash_entry *) 0; |
| sym_name = (const char *) 0; |
| unresolved_reloc = FALSE; |
| warned = FALSE; |
| |
| if (r_type == R_PPC64_TOC) |
| { |
| /* Relocation value is TOC base. */ |
| relocation = TOCstart + htab->stub_group[input_section->id].toc_off; |
| } |
| else if (r_symndx < symtab_hdr->sh_info) |
| { |
| /* It's a local symbol. */ |
| sym = local_syms + r_symndx; |
| sec = local_sections[r_symndx]; |
| sym_name = bfd_elf_local_sym_name (input_bfd, sym); |
| relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
| if (elf_section_data (sec) != NULL) |
| { |
| long *opd_sym_adjust; |
| |
| opd_sym_adjust = ppc64_elf_section_data (sec)->opd.adjust; |
| if (opd_sym_adjust != NULL && sym->st_value % 24 == 0) |
| relocation += opd_sym_adjust[sym->st_value / 24]; |
| } |
| } |
| else |
| { |
| /* It's a global symbol. */ |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| while (h->root.type == bfd_link_hash_indirect |
| || h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| sym_name = h->root.root.string; |
| relocation = 0; |
| if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| sec = h->root.u.def.section; |
| if (sec->output_section == NULL) |
| /* Set a flag that will be cleared later if we find a |
| relocation value for this symbol. output_section |
| is typically NULL for symbols satisfied by a shared |
| library. */ |
| unresolved_reloc = TRUE; |
| else |
| relocation = (h->root.u.def.value |
| + sec->output_section->vma |
| + sec->output_offset); |
| } |
| else if (h->root.type == bfd_link_hash_undefweak) |
| ; |
| else if (info->shared |
| && !info->no_undefined |
| && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) |
| ; |
| else |
| { |
| if (! ((*info->callbacks->undefined_symbol) |
| (info, h->root.root.string, input_bfd, input_section, |
| rel->r_offset, (!info->shared |
| || info->no_undefined |
| || ELF_ST_VISIBILITY (h->other))))) |
| return FALSE; |
| warned = TRUE; |
| } |
| } |
| |
| /* TLS optimizations. Replace instruction sequences and relocs |
| based on information we collected in tls_optimize. We edit |
| RELOCS so that --emit-relocs will output something sensible |
| for the final instruction stream. */ |
| tls_mask = 0; |
| tls_gd = 0; |
| if (IS_PPC64_TLS_RELOC (r_type)) |
| { |
| if (h != NULL) |
| tls_mask = ((struct ppc_link_hash_entry *) h)->tls_mask; |
| else if (local_got_ents != NULL) |
| { |
| char *lgot_masks; |
| lgot_masks = (char *) (local_got_ents + symtab_hdr->sh_info); |
| tls_mask = lgot_masks[r_symndx]; |
| } |
| } |
| |
| /* Ensure reloc mapping code below stays sane. */ |
| if (R_PPC64_TOC16_LO_DS != R_PPC64_TOC16_DS + 1 |
| || R_PPC64_TOC16_LO != R_PPC64_TOC16 + 1 |
| || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TLSGD16 & 3) |
| || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TLSGD16_LO & 3) |
| || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TLSGD16_HI & 3) |
| || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TLSGD16_HA & 3) |
| || (R_PPC64_GOT_TLSLD16 & 3) != (R_PPC64_GOT_TPREL16_DS & 3) |
| || (R_PPC64_GOT_TLSLD16_LO & 3) != (R_PPC64_GOT_TPREL16_LO_DS & 3) |
| || (R_PPC64_GOT_TLSLD16_HI & 3) != (R_PPC64_GOT_TPREL16_HI & 3) |
| || (R_PPC64_GOT_TLSLD16_HA & 3) != (R_PPC64_GOT_TPREL16_HA & 3)) |
| abort (); |
| switch (r_type) |
| { |
| default: |
| break; |
| |
| case R_PPC64_TOC16: |
| case R_PPC64_TOC16_LO: |
| case R_PPC64_TOC16_DS: |
| case R_PPC64_TOC16_LO_DS: |
| { |
| /* Check for toc tls entries. */ |
| char *toc_tls; |
| int retval; |
| |
| retval = get_tls_mask (&toc_tls, &local_syms, rel, input_bfd); |
| if (retval == 0) |
| return FALSE; |
| |
| if (toc_tls) |
| { |
| tls_mask = *toc_tls; |
| if (r_type == R_PPC64_TOC16_DS |
| || r_type == R_PPC64_TOC16_LO_DS) |
| goto toctprel; |
| else |
| { |
| /* If we found a GD reloc pair, then we might be |
| doing a GD->IE transition. */ |
| if (retval == 2) |
| { |
| tls_gd = TLS_TPRELGD; |
| if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) |
| goto tls_get_addr_check; |
| } |
| else if (retval == 3) |
| { |
| if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) |
| goto tls_get_addr_check; |
| } |
| } |
| } |
| } |
| break; |
| |
| case R_PPC64_GOT_TPREL16_DS: |
| case R_PPC64_GOT_TPREL16_LO_DS: |
| toctprel: |
| if (tls_mask != 0 |
| && (tls_mask & TLS_TPREL) == 0) |
| { |
| bfd_vma insn; |
| insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2); |
| insn &= 31 << 21; |
| insn |= 0x3c0d0000; /* addis 0,13,0 */ |
| bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2); |
| r_type = R_PPC64_TPREL16_HA; |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| } |
| break; |
| |
| case R_PPC64_TLS: |
| if (tls_mask == 0) |
| { |
| /* Check for toc tls entries. */ |
| char *toc_tls; |
| |
| if (!get_tls_mask (&toc_tls, &local_syms, rel, input_bfd)) |
| return FALSE; |
| |
| if (toc_tls) |
| tls_mask = *toc_tls; |
| } |
| if (tls_mask != 0 |
| && (tls_mask & TLS_TPREL) == 0) |
| { |
| bfd_vma insn, rtra; |
| insn = bfd_get_32 (output_bfd, contents + rel->r_offset); |
| if ((insn & ((31 << 26) | (31 << 11))) |
| == ((31 << 26) | (13 << 11))) |
| rtra = insn & ((1 << 26) - (1 << 16)); |
| else if ((insn & ((31 << 26) | (31 << 16))) |
| == ((31 << 26) | (13 << 16))) |
| rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5); |
| else |
| abort (); |
| if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1) |
| /* add -> addi. */ |
| insn = 14 << 26; |
| else if ((insn & (31 << 1)) == 23 << 1 |
| && ((insn & (31 << 6)) < 14 << 6 |
| || ((insn & (31 << 6)) >= 16 << 6 |
| && (insn & (31 << 6)) < 24 << 6))) |
| /* load and store indexed -> dform. */ |
| insn = (32 | ((insn >> 6) & 31)) << 26; |
| else if ((insn & (31 << 1)) == 21 << 1 |
| && (insn & (0x1a << 6)) == 0) |
| /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */ |
| insn = (((58 | ((insn >> 6) & 4)) << 26) |
| | ((insn >> 6) & 1)); |
| else if ((insn & (31 << 1)) == 21 << 1 |
| && (insn & ((1 << 11) - (1 << 1))) == 341 << 1) |
| /* lwax -> lwa. */ |
| insn = (58 << 26) | 2; |
| else |
| abort (); |
| insn |= rtra; |
| bfd_put_32 (output_bfd, insn, contents + rel->r_offset); |
| r_type = R_PPC64_TPREL16_LO; |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| /* Was PPC64_TLS which sits on insn boundary, now |
| PPC64_TPREL16_LO which is at insn+2. */ |
| rel->r_offset += 2; |
| } |
| break; |
| |
| case R_PPC64_GOT_TLSGD16_HI: |
| case R_PPC64_GOT_TLSGD16_HA: |
| tls_gd = TLS_TPRELGD; |
| if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) |
| goto tls_gdld_hi; |
| break; |
| |
| case R_PPC64_GOT_TLSLD16_HI: |
| case R_PPC64_GOT_TLSLD16_HA: |
| if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) |
| { |
| tls_gdld_hi: |
| if ((tls_mask & tls_gd) != 0) |
| r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) |
| + R_PPC64_GOT_TPREL16_DS); |
| else |
| { |
| bfd_put_32 (output_bfd, NOP, contents + rel->r_offset); |
| rel->r_offset -= 2; |
| r_type = R_PPC64_NONE; |
| } |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| } |
| break; |
| |
| case R_PPC64_GOT_TLSGD16: |
| case R_PPC64_GOT_TLSGD16_LO: |
| tls_gd = TLS_TPRELGD; |
| if (tls_mask != 0 && (tls_mask & TLS_GD) == 0) |
| goto tls_get_addr_check; |
| break; |
| |
| case R_PPC64_GOT_TLSLD16: |
| case R_PPC64_GOT_TLSLD16_LO: |
| if (tls_mask != 0 && (tls_mask & TLS_LD) == 0) |
| { |
| tls_get_addr_check: |
| if (rel + 1 < relend) |
| { |
| enum elf_ppc64_reloc_type r_type2; |
| unsigned long r_symndx2; |
| struct elf_link_hash_entry *h2; |
| bfd_vma insn1, insn2, insn3; |
| bfd_vma offset; |
| |
| /* The next instruction should be a call to |
| __tls_get_addr. Peek at the reloc to be sure. */ |
| r_type2 |
| = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rel[1].r_info); |
| r_symndx2 = ELF64_R_SYM (rel[1].r_info); |
| if (r_symndx2 < symtab_hdr->sh_info |
| || (r_type2 != R_PPC64_REL14 |
| && r_type2 != R_PPC64_REL14_BRTAKEN |
| && r_type2 != R_PPC64_REL14_BRNTAKEN |
| && r_type2 != R_PPC64_REL24)) |
| break; |
| |
| h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info]; |
| while (h2->root.type == bfd_link_hash_indirect |
| || h2->root.type == bfd_link_hash_warning) |
| h2 = (struct elf_link_hash_entry *) h2->root.u.i.link; |
| if (h2 == NULL || h2 != htab->tls_get_addr) |
| break; |
| |
| /* OK, it checks out. Replace the call. */ |
| offset = rel[1].r_offset; |
| insn1 = bfd_get_32 (output_bfd, |
| contents + rel->r_offset - 2); |
| insn3 = bfd_get_32 (output_bfd, |
| contents + offset + 4); |
| if ((tls_mask & tls_gd) != 0) |
| { |
| /* IE */ |
| insn1 &= (1 << 26) - (1 << 2); |
| insn1 |= 58 << 26; /* ld */ |
| insn2 = 0x7c636a14; /* add 3,3,13 */ |
| rel[1].r_info = ELF64_R_INFO (r_symndx2, R_PPC64_NONE); |
| if ((tls_mask & TLS_EXPLICIT) == 0) |
| r_type = (((r_type - (R_PPC64_GOT_TLSGD16 & 3)) & 3) |
| + R_PPC64_GOT_TPREL16_DS); |
| else |
| r_type += R_PPC64_TOC16_DS - R_PPC64_TOC16; |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| } |
| else |
| { |
| /* LE */ |
| insn1 = 0x3c6d0000; /* addis 3,13,0 */ |
| insn2 = 0x38630000; /* addi 3,3,0 */ |
| if (tls_gd == 0) |
| { |
| /* Was an LD reloc. */ |
| r_symndx = 0; |
| rel->r_addend = htab->tls_sec->vma + DTP_OFFSET; |
| rel[1].r_addend = htab->tls_sec->vma + DTP_OFFSET; |
| } |
| r_type = R_PPC64_TPREL16_HA; |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| rel[1].r_info = ELF64_R_INFO (r_symndx, |
| R_PPC64_TPREL16_LO); |
| rel[1].r_offset += 2; |
| } |
| if (insn3 == NOP |
| || insn3 == CROR_151515 || insn3 == CROR_313131) |
| { |
| insn3 = insn2; |
| insn2 = NOP; |
| rel[1].r_offset += 4; |
| } |
| bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2); |
| bfd_put_32 (output_bfd, insn2, contents + offset); |
| bfd_put_32 (output_bfd, insn3, contents + offset + 4); |
| if (tls_gd == 0) |
| { |
| /* We changed the symbol on an LD reloc. Start over |
| in order to get h, sym, sec etc. right. */ |
| rel--; |
| continue; |
| } |
| } |
| } |
| break; |
| |
| case R_PPC64_DTPMOD64: |
| if (rel + 1 < relend |
| && rel[1].r_info == ELF64_R_INFO (r_symndx, R_PPC64_DTPREL64) |
| && rel[1].r_offset == rel->r_offset + 8) |
| { |
| if ((tls_mask & TLS_GD) == 0) |
| { |
| rel[1].r_info = ELF64_R_INFO (r_symndx, R_PPC64_NONE); |
| if ((tls_mask & TLS_TPRELGD) != 0) |
| r_type = R_PPC64_TPREL64; |
| else |
| { |
| bfd_put_64 (output_bfd, (bfd_vma) 1, |
| contents + rel->r_offset); |
| r_type = R_PPC64_NONE; |
| } |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| } |
| } |
| else |
| { |
| if ((tls_mask & TLS_LD) == 0) |
| { |
| bfd_put_64 (output_bfd, (bfd_vma) 1, |
| contents + rel->r_offset); |
| r_type = R_PPC64_NONE; |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| } |
| } |
| break; |
| |
| case R_PPC64_TPREL64: |
| if ((tls_mask & TLS_TPREL) == 0) |
| { |
| r_type = R_PPC64_NONE; |
| rel->r_info = ELF64_R_INFO (r_symndx, r_type); |
| } |
| break; |
| } |
| |
| /* Handle other relocations that tweak non-addend part of insn. */ |
| insn = 0; |
| switch (r_type) |
| { |
| default: |
| break; |
| |
| /* Branch taken prediction relocations. */ |
| case R_PPC64_ADDR14_BRTAKEN: |
| case R_PPC64_REL14_BRTAKEN: |
| insn = 0x01 << 21; /* 'y' or 't' bit, lowest bit of BO field. */ |
| /* Fall thru. */ |
| |
| /* Branch not taken prediction relocations. */ |
| case R_PPC64_ADDR14_BRNTAKEN: |
| case R_PPC64_REL14_BRNTAKEN: |
| insn |= bfd_get_32 (output_bfd, |
| contents + rel->r_offset) & ~(0x01 << 21); |
| if (is_power4) |
| { |
| /* Set 'a' bit. This is 0b00010 in BO field for branch |
| on CR(BI) insns (BO == 001at or 011at), and 0b01000 |
| for branch on CTR insns (BO == 1a00t or 1a01t). */ |
| if ((insn & (0x14 << 21)) == (0x04 << 21)) |
| insn |= 0x02 << 21; |
| else if ((insn & (0x14 << 21)) == (0x10 << 21)) |
| insn |= 0x08 << 21; |
| else |
| break; |
| } |
| else |
| { |
| from = (rel->r_offset |
| + input_section->output_offset |
| + input_section->output_section->vma); |
| |
| /* Invert 'y' bit if not the default. */ |
| if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0) |
| insn ^= 0x01 << 21; |
| } |
| |
| bfd_put_32 (output_bfd, (bfd_vma) insn, contents + rel->r_offset); |
| break; |
| |
| case R_PPC64_REL24: |
| /* Calls to functions with a different TOC, such as calls to |
| shared objects, need to alter the TOC pointer. This is |
| done using a linkage stub. A REL24 branching to these |
| linkage stubs needs to be followed by a nop, as the nop |
| will be replaced with an instruction to restore the TOC |
| base pointer. */ |
| if (((h != NULL |
| && (fdh = ((struct ppc_link_hash_entry *) h)->oh) != NULL |
| && fdh->plt.plist != NULL) |
| || ((fdh = h, sec) != NULL |
| && sec->output_section != NULL |
| && (htab->stub_group[sec->id].toc_off |
| != htab->stub_group[input_section->id].toc_off))) |
| && (stub_entry = ppc_get_stub_entry (input_section, sec, fdh, |
| rel, htab)) != NULL |
| && (stub_entry->stub_type == ppc_stub_plt_call |
| || stub_entry->stub_type == ppc_stub_plt_branch_r2off |
| || stub_entry->stub_type == ppc_stub_long_branch_r2off)) |
| { |
| bfd_boolean can_plt_call = 0; |
| |
| if (rel->r_offset + 8 <= input_section->_cooked_size) |
| { |
| insn = bfd_get_32 (input_bfd, contents + rel->r_offset + 4); |
| if (insn == NOP |
| || insn == CROR_151515 || insn == CROR_313131) |
| { |
| bfd_put_32 (input_bfd, (bfd_vma) LD_R2_40R1, |
| contents + rel->r_offset + 4); |
| can_plt_call = 1; |
| } |
| } |
| |
| if (!can_plt_call) |
| { |
| if (stub_entry->stub_type == ppc_stub_plt_call) |
| { |
| /* If this is a plain branch rather than a branch |
| and link, don't require a nop. */ |
| insn = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| if ((insn & 1) == 0) |
| can_plt_call = 1; |
| } |
| else |
| { |
| if (strcmp (input_section->output_section->name, |
| ".init") == 0 |
| || strcmp (input_section->output_section->name, |
| ".fini") == 0) |
| (*_bfd_error_handler) |
| (_("%s(%s+0x%lx): automatic multiple TOCs " |
| "not supported using your crt files; " |
| "recompile with -mminimal-toc or upgrade gcc"), |
| bfd_archive_filename (input_bfd), |
| input_section->name, |
| (long) rel->r_offset); |
| else |
| (*_bfd_error_handler) |
| (_("%s(%s+0x%lx): sibling call optimization to `%s' " |
| "does not allow automatic multiple TOCs; " |
| "recompile with -mminimal-toc or " |
| "-fno-optimize-sibling-calls, " |
| "or make `%s' extern"), |
| bfd_archive_filename (input_bfd), |
| input_section->name, |
| (long) rel->r_offset, |
| sym_name, |
| sym_name); |
| bfd_set_error (bfd_error_bad_value); |
| ret = FALSE; |
| } |
| } |
| |
| if (can_plt_call) |
| { |
| relocation = (stub_entry->stub_offset |
| + stub_entry->stub_sec->output_offset |
| + stub_entry->stub_sec->output_section->vma); |
| if (stub_entry->stub_type == ppc_stub_plt_call) |
| unresolved_reloc = FALSE; |
| } |
| } |
| |
| if (h != NULL |
| && h->root.type == bfd_link_hash_undefweak |
| && relocation == 0 |
| && rel->r_addend == 0) |
| { |
| /* Tweak calls to undefined weak functions to point at a |
| blr. We can thus call a weak function without first |
| checking whether the function is defined. We have a |
| blr at the end of .sfpr. */ |
| BFD_ASSERT (htab->sfpr->_raw_size != 0); |
| relocation = (htab->sfpr->_raw_size - 4 |
| + htab->sfpr->output_offset |
| + htab->sfpr->output_section->vma); |
| from = (rel->r_offset |
| + input_section->output_offset |
| + input_section->output_section->vma); |
| |
| /* But let's not be silly about it. If the blr isn't in |
| reach, just go to the next instruction. */ |
| if (relocation - from + (1 << 25) >= (1 << 26) |
| || htab->sfpr->_raw_size == 0) |
| relocation = from + 4; |
| } |
| break; |
| } |
| |
| /* Set `addend'. */ |
| tls_type = 0; |
| addend = rel->r_addend; |
| switch (r_type) |
| { |
| default: |
| (*_bfd_error_handler) |
| (_("%s: unknown relocation type %d for symbol %s"), |
| bfd_archive_filename (input_bfd), (int) r_type, sym_name); |
| |
| bfd_set_error (bfd_error_bad_value); |
| ret = FALSE; |
| continue; |
| |
| case R_PPC64_NONE: |
| case R_PPC64_TLS: |
| case R_PPC64_GNU_VTINHERIT: |
| case R_PPC64_GNU_VTENTRY: |
| continue; |
| |
| /* GOT16 relocations. Like an ADDR16 using the symbol's |
| address in the GOT as relocation value instead of the |
| symbol's value itself. Also, create a GOT entry for the |
| symbol and put the symbol value there. */ |
| case R_PPC64_GOT_TLSGD16: |
| case R_PPC64_GOT_TLSGD16_LO: |
| case R_PPC64_GOT_TLSGD16_HI: |
| case R_PPC64_GOT_TLSGD16_HA: |
| tls_type = TLS_TLS | TLS_GD; |
| goto dogot; |
| |
| case R_PPC64_GOT_TLSLD16: |
| case R_PPC64_GOT_TLSLD16_LO: |
| case R_PPC64_GOT_TLSLD16_HI: |
| case R_PPC64_GOT_TLSLD16_HA: |
| tls_type = TLS_TLS | TLS_LD; |
| goto dogot; |
| |
| case R_PPC64_GOT_TPREL16_DS: |
| case R_PPC64_GOT_TPREL16_LO_DS: |
| case R_PPC64_GOT_TPREL16_HI: |
| case R_PPC64_GOT_TPREL16_HA: |
| tls_type = TLS_TLS | TLS_TPREL; |
| goto dogot; |
| |
| case R_PPC64_GOT_DTPREL16_DS: |
| case R_PPC64_GOT_DTPREL16_LO_DS: |
| case R_PPC64_GOT_DTPREL16_HI: |
| case R_PPC64_GOT_DTPREL16_HA: |
| tls_type = TLS_TLS | TLS_DTPREL; |
| goto dogot; |
| |
| case R_PPC64_GOT16: |
| case R_PPC64_GOT16_LO: |
| case R_PPC64_GOT16_HI: |
| case R_PPC64_GOT16_HA: |
| case R_PPC64_GOT16_DS: |
| case R_PPC64_GOT16_LO_DS: |
| dogot: |
| { |
| /* Relocation is to the entry for this symbol in the global |
| offset table. */ |
| bfd_vma *offp; |
| bfd_vma off; |
| unsigned long indx = 0; |
| |
| if (htab->sgot == NULL) |
| abort (); |
| |
| if (tls_type == (TLS_TLS | TLS_LD) |
| && (h == NULL |
| || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))) |
| offp = &htab->tlsld_got.offset; |
| else |
| { |
| struct got_entry *ent; |
| |
| if (h != NULL) |
| { |
| bfd_boolean dyn = htab->elf.dynamic_sections_created; |
| if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
| || (info->shared |
| && SYMBOL_REFERENCES_LOCAL (info, h))) |
| /* This is actually a static link, or it is a |
| -Bsymbolic link and the symbol is defined |
| locally, or the symbol was forced to be local |
| because of a version file. */ |
| ; |
| else |
| { |
| indx = h->dynindx; |
| unresolved_reloc = FALSE; |
| } |
| ent = h->got.glist; |
| } |
| else |
| { |
| if (local_got_ents == NULL) |
| abort (); |
| ent = local_got_ents[r_symndx]; |
| } |
| |
| for (; ent != NULL; ent = ent->next) |
| if (ent->addend == rel->r_addend |
| && ent->tls_type == tls_type) |
| break; |
| if (ent == NULL) |
| abort (); |
| offp = &ent->got.offset; |
| } |
| |
| /* The offset must always be a multiple of 8. We use the |
| least significant bit to record whether we have already |
| processed this entry. */ |
| off = *offp; |
| if ((off & 1) != 0) |
| off &= ~1; |
| else |
| { |
| /* Generate relocs for the dynamic linker, except in |
| the case of TLSLD where we'll use one entry per |
| module. */ |
| *offp = off | 1; |
| if ((info->shared || indx != 0) |
| && (h == NULL |
| || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| || h->root.type != bfd_link_hash_undefweak)) |
| { |
| outrel.r_offset = (htab->sgot->output_section->vma |
| + htab->sgot->output_offset |
| + off); |
| if (tls_type & (TLS_LD | TLS_GD)) |
| { |
| outrel.r_addend = 0; |
| outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPMOD64); |
| if (tls_type == (TLS_TLS | TLS_GD)) |
| { |
| loc = htab->srelgot->contents; |
| loc += (htab->srelgot->reloc_count++ |
| * sizeof (Elf64_External_Rela)); |
| bfd_elf64_swap_reloca_out (output_bfd, |
| &outrel, loc); |
| outrel.r_offset += 8; |
| outrel.r_info |
| = ELF64_R_INFO (indx, R_PPC64_DTPREL64); |
| } |
| } |
| else if (tls_type == (TLS_TLS | TLS_DTPREL)) |
| outrel.r_info = ELF64_R_INFO (indx, R_PPC64_DTPREL64); |
| else if (tls_type == (TLS_TLS | TLS_TPREL)) |
| outrel.r_info = ELF64_R_INFO (indx, R_PPC64_TPREL64); |
| else if (indx == 0) |
| outrel.r_info = ELF64_R_INFO (indx, R_PPC64_RELATIVE); |
| else |
| outrel.r_info = ELF64_R_INFO (indx, R_PPC64_GLOB_DAT); |
| outrel.r_addend = rel->r_addend; |
| if (indx == 0) |
| { |
| outrel.r_addend += relocation; |
| if (tls_type & (TLS_GD | TLS_DTPREL | TLS_TPREL)) |
| outrel.r_addend -= htab->tls_sec->vma; |
| } |
| loc = htab->srelgot->contents; |
| loc += (htab->srelgot->reloc_count++ |
| * sizeof (Elf64_External_Rela)); |
| bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| } |
| |
| /* Init the .got section contents here if we're not |
| emitting a reloc. A reloc will also init the |
| section contents via _bfd_final_link_relocate. */ |
| else |
| { |
| relocation += rel->r_addend; |
| if (tls_type == (TLS_TLS | TLS_LD)) |
| relocation = 1; |
| else if (tls_type != 0) |
| { |
| relocation -= htab->tls_sec->vma + DTP_OFFSET; |
| if (tls_type == (TLS_TLS | TLS_TPREL)) |
| relocation += DTP_OFFSET - TP_OFFSET; |
| |
| if (tls_type == (TLS_TLS | TLS_GD)) |
| { |
| bfd_put_64 (output_bfd, relocation, |
| htab->sgot->contents + off + 8); |
| relocation = 1; |
| } |
| } |
| |
| bfd_put_64 (output_bfd, relocation, |
| htab->sgot->contents + off); |
| } |
| } |
| |
| if (off >= (bfd_vma) -2) |
| abort (); |
| |
| relocation = htab->sgot->output_offset + off; |
| |
| /* TOC base (r2) is TOC start plus 0x8000. */ |
| addend = - TOC_BASE_OFF; |
| } |
| break; |
| |
| case R_PPC64_PLT16_HA: |
| case R_PPC64_PLT16_HI: |
| case R_PPC64_PLT16_LO: |
| case R_PPC64_PLT32: |
| case R_PPC64_PLT64: |
| /* Relocation is to the entry for this symbol in the |
| procedure linkage table. */ |
| |
| /* Resolve a PLT reloc against a local symbol directly, |
| without using the procedure linkage table. */ |
| if (h == NULL) |
| break; |
| |
| /* It's possible that we didn't make a PLT entry for this |
| symbol. This happens when statically linking PIC code, |
| or when using -Bsymbolic. Go find a match if there is a |
| PLT entry. */ |
| if (htab->splt != NULL) |
| { |
| struct plt_entry *ent; |
| for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| if (ent->addend == rel->r_addend |
| && ent->plt.offset != (bfd_vma) -1) |
| { |
| relocation = (htab->splt->output_section->vma |
| + htab->splt->output_offset |
| + ent->plt.offset); |
| unresolved_reloc = FALSE; |
| } |
| } |
| break; |
| |
| /* TOC16 relocs. We want the offset relative to the TOC base, |
| which is the address of the start of the TOC plus 0x8000. |
| The TOC consists of sections .got, .toc, .tocbss, and .plt, |
| in this order. */ |
| case R_PPC64_TOC16: |
| case R_PPC64_TOC16_LO: |
| case R_PPC64_TOC16_HI: |
| case R_PPC64_TOC16_DS: |
| case R_PPC64_TOC16_LO_DS: |
| case R_PPC64_TOC16_HA: |
| addend -= TOCstart + htab->stub_group[input_section->id].toc_off; |
| break; |
| |
| /* Relocate against the beginning of the section. */ |
| case R_PPC64_SECTOFF: |
| case R_PPC64_SECTOFF_LO: |
| case R_PPC64_SECTOFF_HI: |
| case R_PPC64_SECTOFF_DS: |
| case R_PPC64_SECTOFF_LO_DS: |
| case R_PPC64_SECTOFF_HA: |
| if (sec != (asection *) 0) |
| addend -= sec->output_section->vma; |
| break; |
| |
| case R_PPC64_REL14: |
| case R_PPC64_REL14_BRNTAKEN: |
| case R_PPC64_REL14_BRTAKEN: |
| case R_PPC64_REL24: |
| break; |
| |
| case R_PPC64_TPREL16: |
| case R_PPC64_TPREL16_LO: |
| case R_PPC64_TPREL16_HI: |
| case R_PPC64_TPREL16_HA: |
| case R_PPC64_TPREL16_DS: |
| case R_PPC64_TPREL16_LO_DS: |
| case R_PPC64_TPREL16_HIGHER: |
| case R_PPC64_TPREL16_HIGHERA: |
| case R_PPC64_TPREL16_HIGHEST: |
| case R_PPC64_TPREL16_HIGHESTA: |
| addend -= htab->tls_sec->vma + TP_OFFSET; |
| if (info->shared) |
| /* The TPREL16 relocs shouldn't really be used in shared |
| libs as they will result in DT_TEXTREL being set, but |
| support them anyway. */ |
| goto dodyn; |
| break; |
| |
| case R_PPC64_DTPREL16: |
| case R_PPC64_DTPREL16_LO: |
| case R_PPC64_DTPREL16_HI: |
| case R_PPC64_DTPREL16_HA: |
| case R_PPC64_DTPREL16_DS: |
| case R_PPC64_DTPREL16_LO_DS: |
| case R_PPC64_DTPREL16_HIGHER: |
| case R_PPC64_DTPREL16_HIGHERA: |
| case R_PPC64_DTPREL16_HIGHEST: |
| case R_PPC64_DTPREL16_HIGHESTA: |
| addend -= htab->tls_sec->vma + DTP_OFFSET; |
| break; |
| |
| case R_PPC64_DTPMOD64: |
| relocation = 1; |
| addend = 0; |
| goto dodyn; |
| |
| case R_PPC64_TPREL64: |
| addend -= htab->tls_sec->vma + TP_OFFSET; |
| goto dodyn; |
| |
| case R_PPC64_DTPREL64: |
| addend -= htab->tls_sec->vma + DTP_OFFSET; |
| /* Fall thru */ |
| |
| /* Relocations that may need to be propagated if this is a |
| dynamic object. */ |
| case R_PPC64_REL30: |
| case R_PPC64_REL32: |
| case R_PPC64_REL64: |
| case R_PPC64_ADDR14: |
| case R_PPC64_ADDR14_BRNTAKEN: |
| case R_PPC64_ADDR14_BRTAKEN: |
| case R_PPC64_ADDR16: |
| case R_PPC64_ADDR16_DS: |
| case R_PPC64_ADDR16_HA: |
| case R_PPC64_ADDR16_HI: |
| case R_PPC64_ADDR16_HIGHER: |
| case R_PPC64_ADDR16_HIGHERA: |
| case R_PPC64_ADDR16_HIGHEST: |
| case R_PPC64_ADDR16_HIGHESTA: |
| case R_PPC64_ADDR16_LO: |
| case R_PPC64_ADDR16_LO_DS: |
| case R_PPC64_ADDR24: |
| case R_PPC64_ADDR32: |
| case R_PPC64_ADDR64: |
| case R_PPC64_UADDR16: |
| case R_PPC64_UADDR32: |
| case R_PPC64_UADDR64: |
| /* r_symndx will be zero only for relocs against symbols |
| from removed linkonce sections, or sections discarded by |
| a linker script. */ |
| dodyn: |
| if (r_symndx == 0) |
| break; |
| /* Fall thru. */ |
| |
| case R_PPC64_TOC: |
| if ((input_section->flags & SEC_ALLOC) == 0) |
| break; |
| |
| if (NO_OPD_RELOCS && is_opd) |
| break; |
| |
| if ((info->shared |
| && (h == NULL |
| || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
| || h->root.type != bfd_link_hash_undefweak) |
| && (MUST_BE_DYN_RELOC (r_type) |
| || (h != NULL |
| && !SYMBOL_CALLS_LOCAL (info, h)))) |
| || (ELIMINATE_COPY_RELOCS |
| && !info->shared |
| && h != NULL |
| && h->dynindx != -1 |
| && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| { |
| Elf_Internal_Rela outrel; |
| bfd_boolean skip, relocate; |
| asection *sreloc; |
| bfd_byte *loc; |
| |
| /* When generating a dynamic object, these relocations |
| are copied into the output file to be resolved at run |
| time. */ |
| |
| skip = FALSE; |
| relocate = FALSE; |
| |
| outrel.r_offset = |
| _bfd_elf_section_offset (output_bfd, info, input_section, |
| rel->r_offset); |
| if (outrel.r_offset == (bfd_vma) -1) |
| skip = TRUE; |
| else if (outrel.r_offset == (bfd_vma) -2) |
| skip = TRUE, relocate = TRUE; |
| outrel.r_offset += (input_section->output_section->vma |
| + input_section->output_offset); |
| outrel.r_addend = rel->r_addend; |
| |
| if (skip) |
| memset (&outrel, 0, sizeof outrel); |
| else if (h != NULL |
| && !SYMBOL_REFERENCES_LOCAL (info, h) |
| && !is_opd) |
| outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
| else |
| { |
| /* This symbol is local, or marked to become local, |
| or this is an opd section reloc which must point |
| at a local function. */ |
| outrel.r_addend += relocation; |
| /* We need to relocate .opd contents for ld.so, and |
| it doesn't hurt to relocate in other cases. */ |
| relocate = TRUE; |
| if (r_type == R_PPC64_ADDR64 || r_type == R_PPC64_TOC) |
| { |
| if (is_opd && h != NULL) |
| { |
| /* Lie about opd entries. This case occurs |
| when building shared libraries and we |
| reference a function in another shared |
| lib. The same thing happens for a weak |
| definition in an application that's |
| overridden by a strong definition in a |
| shared lib. (I believe this is a generic |
| bug in binutils handling of weak syms.) |
| In these cases we won't use the opd |
| entry in this lib. */ |
| unresolved_reloc = FALSE; |
| } |
| outrel.r_info = ELF64_R_INFO (0, R_PPC64_RELATIVE); |
| } |
| else |
| { |
| long indx = 0; |
| |
| if (bfd_is_abs_section (sec)) |
| ; |
| else if (sec == NULL || sec->owner == NULL) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return FALSE; |
| } |
| else |
| { |
| asection *osec; |
| |
| osec = sec->output_section; |
| indx = elf_section_data (osec)->dynindx; |
| |
| /* We are turning this relocation into one |
| against a section symbol, so subtract out |
| the output section's address but not the |
| offset of the input section in the output |
| section. */ |
| outrel.r_addend -= osec->vma; |
| } |
| |
| outrel.r_info = ELF64_R_INFO (indx, r_type); |
| } |
| } |
| |
| sreloc = elf_section_data (input_section)->sreloc; |
| if (sreloc == NULL) |
| abort (); |
| |
| loc = sreloc->contents; |
| loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); |
| bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
| |
| /* If this reloc is against an external symbol, it will |
| be computed at runtime, so there's no need to do |
| anything now. */ |
| if (! relocate) |
| continue; |
| } |
| break; |
| |
| case R_PPC64_COPY: |
| case R_PPC64_GLOB_DAT: |
| case R_PPC64_JMP_SLOT: |
| case R_PPC64_RELATIVE: |
| /* We shouldn't ever see these dynamic relocs in relocatable |
| files. */ |
| /* Fall through. */ |
| |
| case R_PPC64_PLTGOT16: |
| case R_PPC64_PLTGOT16_DS: |
| case R_PPC64_PLTGOT16_HA: |
| case R_PPC64_PLTGOT16_HI: |
| case R_PPC64_PLTGOT16_LO: |
| case R_PPC64_PLTGOT16_LO_DS: |
| case R_PPC64_PLTREL32: |
| case R_PPC64_PLTREL64: |
| /* These ones haven't been implemented yet. */ |
| |
| (*_bfd_error_handler) |
| (_("%s: relocation %s is not supported for symbol %s."), |
| bfd_archive_filename (input_bfd), |
| ppc64_elf_howto_table[(int) r_type]->name, sym_name); |
| |
| bfd_set_error (bfd_error_invalid_operation); |
| ret = FALSE; |
| continue; |
| } |
| |
| /* Do any further special processing. */ |
| switch (r_type) |
| { |
| default: |
| break; |
| |
| case R_PPC64_ADDR16_HA: |
| case R_PPC64_ADDR16_HIGHERA: |
| case R_PPC64_ADDR16_HIGHESTA: |
| case R_PPC64_GOT16_HA: |
| case R_PPC64_PLTGOT16_HA: |
| case R_PPC64_PLT16_HA: |
| case R_PPC64_TOC16_HA: |
| case R_PPC64_SECTOFF_HA: |
| case R_PPC64_TPREL16_HA: |
| case R_PPC64_DTPREL16_HA: |
| case R_PPC64_GOT_TLSGD16_HA: |
| case R_PPC64_GOT_TLSLD16_HA: |
| case R_PPC64_GOT_TPREL16_HA: |
| case R_PPC64_GOT_DTPREL16_HA: |
| case R_PPC64_TPREL16_HIGHER: |
| case R_PPC64_TPREL16_HIGHERA: |
| case R_PPC64_TPREL16_HIGHEST: |
| case R_PPC64_TPREL16_HIGHESTA: |
| case R_PPC64_DTPREL16_HIGHER: |
| case R_PPC64_DTPREL16_HIGHERA: |
| case R_PPC64_DTPREL16_HIGHEST: |
| case R_PPC64_DTPREL16_HIGHESTA: |
| /* It's just possible that this symbol is a weak symbol |
| that's not actually defined anywhere. In that case, |
| 'sec' would be NULL, and we should leave the symbol |
| alone (it will be set to zero elsewhere in the link). */ |
| if (sec != NULL) |
| /* Add 0x10000 if sign bit in 0:15 is set. |
| Bits 0:15 are not used. */ |
| addend += 0x8000; |
| break; |
| |
| case R_PPC64_ADDR16_DS: |
| case R_PPC64_ADDR16_LO_DS: |
| case R_PPC64_GOT16_DS: |
| case R_PPC64_GOT16_LO_DS: |
| case R_PPC64_PLT16_LO_DS: |
| case R_PPC64_SECTOFF_DS: |
| case R_PPC64_SECTOFF_LO_DS: |
| case R_PPC64_TOC16_DS: |
| case R_PPC64_TOC16_LO_DS: |
| case R_PPC64_PLTGOT16_DS: |
| case R_PPC64_PLTGOT16_LO_DS: |
| case R_PPC64_GOT_TPREL16_DS: |
| case R_PPC64_GOT_TPREL16_LO_DS: |
| case R_PPC64_GOT_DTPREL16_DS: |
| case R_PPC64_GOT_DTPREL16_LO_DS: |
| case R_PPC64_TPREL16_DS: |
| case R_PPC64_TPREL16_LO_DS: |
| case R_PPC64_DTPREL16_DS: |
| case R_PPC64_DTPREL16_LO_DS: |
| insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); |
| mask = 3; |
| /* If this reloc is against an lq insn, then the value must be |
| a multiple of 16. This is somewhat of a hack, but the |
| "correct" way to do this by defining _DQ forms of all the |
| _DS relocs bloats all reloc switches in this file. It |
| doesn't seem to make much sense to use any of these relocs |
| in data, so testing the insn should be safe. */ |
| if ((insn & (0x3f << 26)) == (56 << 26)) |
| mask = 15; |
| if (((relocation + addend) & mask) != 0) |
| { |
| (*_bfd_error_handler) |
| (_("%s: error: relocation %s not a multiple of %d"), |
| bfd_archive_filename (input_bfd), |
| ppc64_elf_howto_table[(int) r_type]->name, |
| mask + 1); |
| bfd_set_error (bfd_error_bad_value); |
| ret = FALSE; |
| continue; |
| } |
| break; |
| |
| case R_PPC64_REL14: |
| case R_PPC64_REL14_BRNTAKEN: |
| case R_PPC64_REL14_BRTAKEN: |
| max_br_offset = 1 << 15; |
| goto branch_check; |
| |
| case R_PPC64_REL24: |
| max_br_offset = 1 << 25; |
| |
| branch_check: |
| /* If the branch is out of reach or the TOC register needs |
| adjusting, then redirect the call to the local stub for |
| this function. */ |
| from = (rel->r_offset |
| + input_section->output_offset |
| + input_section->output_section->vma); |
| if ((relocation + addend - from + max_br_offset >= 2 * max_br_offset |
| || (sec != NULL |
| && sec->output_section != NULL |
| && (htab->stub_group[sec->id].toc_off |
| != htab->stub_group[input_section->id].toc_off))) |
| && (stub_entry = ppc_get_stub_entry (input_section, sec, h, |
| rel, htab)) != NULL) |
| { |
| /* Munge up the value and addend so that we call the stub |
| rather than the procedure directly. */ |
| relocation = (stub_entry->stub_offset |
| + stub_entry->stub_sec->output_offset |
| + stub_entry->stub_sec->output_section->vma); |
| addend = 0; |
| } |
| break; |
| } |
| |
| /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
| because such sections are not SEC_ALLOC and thus ld.so will |
| not process them. */ |
| if (unresolved_reloc |
| && !((input_section->flags & SEC_DEBUGGING) != 0 |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) |
| { |
| (*_bfd_error_handler) |
| (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"), |
| bfd_archive_filename (input_bfd), |
| bfd_get_section_name (input_bfd, input_section), |
| (long) rel->r_offset, |
| ppc64_elf_howto_table[(int) r_type]->name, |
| h->root.root.string); |
| ret = FALSE; |
| } |
| |
| r = _bfd_final_link_relocate (ppc64_elf_howto_table[(int) r_type], |
| input_bfd, |
| input_section, |
| contents, |
| rel->r_offset, |
| relocation, |
| addend); |
| |
| if (r != bfd_reloc_ok) |
| { |
| if (sym_name == NULL) |
| sym_name = "(null)"; |
| if (r == bfd_reloc_overflow) |
| { |
| if (warned) |
| continue; |
| if (h != NULL |
| && h->root.type == bfd_link_hash_undefweak |
| && ppc64_elf_howto_table[(int) r_type]->pc_relative) |
| { |
| /* Assume this is a call protected by other code that |
| detects the symbol is undefined. If this is the case, |
| we can safely ignore the overflow. If not, the |
| program is hosed anyway, and a little warning isn't |
| going to help. */ |
| |
| continue; |
| } |
| |
| if (!((*info->callbacks->reloc_overflow) |
| (info, sym_name, ppc64_elf_howto_table[(int) r_type]->name, |
| rel->r_addend, input_bfd, input_section, rel->r_offset))) |
| return FALSE; |
| } |
| else |
| { |
| (*_bfd_error_handler) |
| (_("%s(%s+0x%lx): %s reloc against `%s': error %d"), |
| bfd_archive_filename (input_bfd), |
| bfd_get_section_name (input_bfd, input_section), |
| (long) rel->r_offset, |
| ppc64_elf_howto_table[(int) r_type]->name, |
| sym_name, |
| (int) r); |
| ret = FALSE; |
| } |
| } |
| } |
| |
| return ret; |
| } |
| |
| /* Finish up dynamic symbol handling. We set the contents of various |
| dynamic sections here. */ |
| |
| static bfd_boolean |
| ppc64_elf_finish_dynamic_symbol (output_bfd, info, h, sym) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| { |
| struct ppc_link_hash_table *htab; |
| bfd *dynobj; |
| |
| htab = ppc_hash_table (info); |
| dynobj = htab->elf.dynobj; |
| |
| if (((struct ppc_link_hash_entry *) h)->is_func_descriptor) |
| { |
| struct plt_entry *ent; |
| Elf_Internal_Rela rela; |
| bfd_byte *loc; |
| |
| for (ent = h->plt.plist; ent != NULL; ent = ent->next) |
| if (ent->plt.offset != (bfd_vma) -1) |
| { |
| /* This symbol has an entry in the procedure linkage |
| table. Set it up. */ |
| |
| if (htab->splt == NULL |
| || htab->srelplt == NULL |
| || htab->sglink == NULL) |
| abort (); |
| |
| /* Create a JMP_SLOT reloc to inform the dynamic linker to |
| fill in the PLT entry. */ |
| rela.r_offset = (htab->splt->output_section->vma |
| + htab->splt->output_offset |
| + ent->plt.offset); |
| rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_JMP_SLOT); |
| rela.r_addend = ent->addend; |
| |
| loc = htab->srelplt->contents; |
| loc += ((ent->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE |
| * sizeof (Elf64_External_Rela)); |
| bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| } |
| } |
| |
| if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| { |
| Elf_Internal_Rela rela; |
| bfd_byte *loc; |
| |
| /* This symbol needs a copy reloc. Set it up. */ |
| |
| if (h->dynindx == -1 |
| || (h->root.type != bfd_link_hash_defined |
| && h->root.type != bfd_link_hash_defweak) |
| || htab->srelbss == NULL) |
| abort (); |
| |
| rela.r_offset = (h->root.u.def.value |
| + h->root.u.def.section->output_section->vma |
| + h->root.u.def.section->output_offset); |
| rela.r_info = ELF64_R_INFO (h->dynindx, R_PPC64_COPY); |
| rela.r_addend = 0; |
| loc = htab->srelbss->contents; |
| loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); |
| bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
| } |
| |
| /* Mark some specially defined symbols as absolute. */ |
| if (strcmp (h->root.root.string, "_DYNAMIC") == 0) |
| sym->st_shndx = SHN_ABS; |
| |
| return TRUE; |
| } |
| |
| /* Used to decide how to sort relocs in an optimal manner for the |
| dynamic linker, before writing them out. */ |
| |
| static enum elf_reloc_type_class |
| ppc64_elf_reloc_type_class (rela) |
| const Elf_Internal_Rela *rela; |
| { |
| enum elf_ppc64_reloc_type r_type; |
| |
| r_type = (enum elf_ppc64_reloc_type) ELF64_R_TYPE (rela->r_info); |
| switch (r_type) |
| { |
| case R_PPC64_RELATIVE: |
| return reloc_class_relative; |
| case R_PPC64_JMP_SLOT: |
| return reloc_class_plt; |
| case R_PPC64_COPY: |
| return reloc_class_copy; |
| default: |
| return reloc_class_normal; |
| } |
| } |
| |
| /* Finish up the dynamic sections. */ |
| |
| static bfd_boolean |
| ppc64_elf_finish_dynamic_sections (output_bfd, info) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| { |
| struct ppc_link_hash_table *htab; |
| bfd *dynobj; |
| asection *sdyn; |
| |
| htab = ppc_hash_table (info); |
| dynobj = htab->elf.dynobj; |
| sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| |
| if (htab->elf.dynamic_sections_created) |
| { |
| Elf64_External_Dyn *dyncon, *dynconend; |
| |
| if (sdyn == NULL || htab->sgot == NULL) |
| abort (); |
| |
| dyncon = (Elf64_External_Dyn *) sdyn->contents; |
| dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| for (; dyncon < dynconend; dyncon++) |
| { |
| Elf_Internal_Dyn dyn; |
| asection *s; |
| |
| bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
| |
| switch (dyn.d_tag) |
| { |
| default: |
| continue; |
| |
| case DT_PPC64_GLINK: |
| s = htab->sglink; |
| dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| /* We stupidly defined DT_PPC64_GLINK to be the start |
| of glink rather than the first entry point, which is |
| what ld.so needs, and now have a bigger stub to |
| support automatic multiple TOCs. */ |
| dyn.d_un.d_ptr += GLINK_CALL_STUB_SIZE - 32; |
| break; |
| |
| case DT_PPC64_OPD: |
| s = bfd_get_section_by_name (output_bfd, ".opd"); |
| if (s == NULL) |
| continue; |
| dyn.d_un.d_ptr = s->vma; |
| break; |
| |
| case DT_PPC64_OPDSZ: |
| s = bfd_get_section_by_name (output_bfd, ".opd"); |
| if (s == NULL) |
| continue; |
| dyn.d_un.d_val = s->_raw_size; |
| break; |
| |
| case DT_PLTGOT: |
| s = htab->splt; |
| dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| break; |
| |
| case DT_JMPREL: |
| s = htab->srelplt; |
| dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| break; |
| |
| case DT_PLTRELSZ: |
| dyn.d_un.d_val = htab->srelplt->_raw_size; |
| break; |
| |
| case DT_RELASZ: |
| /* Don't count procedure linkage table relocs in the |
| overall reloc count. */ |
| s = htab->srelplt; |
| if (s == NULL) |
| continue; |
| dyn.d_un.d_val -= s->_raw_size; |
| break; |
| |
| case DT_RELA: |
| /* We may not be using the standard ELF linker script. |
| If .rela.plt is the first .rela section, we adjust |
| DT_RELA to not include it. */ |
| s = htab->srelplt; |
| if (s == NULL) |
| continue; |
| if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) |
| continue; |
| dyn.d_un.d_ptr += s->_raw_size; |
| break; |
| } |
| |
| bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| } |
| } |
| |
| if (htab->sgot != NULL && htab->sgot->_raw_size != 0) |
| { |
| /* Fill in the first entry in the global offset table. |
| We use it to hold the link-time TOCbase. */ |
| bfd_put_64 (output_bfd, |
| elf_gp (output_bfd) + TOC_BASE_OFF, |
| htab->sgot->contents); |
| |
| /* Set .got entry size. */ |
| elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 8; |
| } |
| |
| if (htab->splt != NULL && htab->splt->_raw_size != 0) |
| { |
| /* Set .plt entry size. */ |
| elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize |
| = PLT_ENTRY_SIZE; |
| } |
| |
| return TRUE; |
| } |
| |
| #include "elf64-target.h" |