| /* SPARC-specific support for 64-bit ELF |
| Copyright (C) 1993, 95, 96, 97, 98, 1999 Free Software Foundation, Inc. |
| |
| 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. */ |
| |
| #include "bfd.h" |
| #include "sysdep.h" |
| #include "libbfd.h" |
| #include "elf-bfd.h" |
| |
| /* This is defined if one wants to build upward compatible binaries |
| with the original sparc64-elf toolchain. The support is kept in for |
| now but is turned off by default. dje 970930 */ |
| /*#define SPARC64_OLD_RELOCS*/ |
| |
| #include "elf/sparc.h" |
| |
| /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
| #define MINUS_ONE (~ (bfd_vma) 0) |
| |
| static reloc_howto_type *sparc64_elf_reloc_type_lookup |
| PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| static void sparc64_elf_info_to_howto |
| PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
| |
| static void sparc64_elf_build_plt |
| PARAMS((bfd *, unsigned char *, int)); |
| static bfd_vma sparc64_elf_plt_entry_offset |
| PARAMS((int)); |
| static bfd_vma sparc64_elf_plt_ptr_offset |
| PARAMS((int, int)); |
| |
| static boolean sparc64_elf_check_relocs |
| PARAMS((bfd *, struct bfd_link_info *, asection *sec, |
| const Elf_Internal_Rela *)); |
| static boolean sparc64_elf_adjust_dynamic_symbol |
| PARAMS((struct bfd_link_info *, struct elf_link_hash_entry *)); |
| static boolean sparc64_elf_size_dynamic_sections |
| PARAMS((bfd *, struct bfd_link_info *)); |
| static boolean sparc64_elf_adjust_dynindx |
| PARAMS((struct elf_link_hash_entry *, PTR)); |
| |
| static boolean sparc64_elf_merge_private_bfd_data |
| PARAMS ((bfd *, bfd *)); |
| |
| static boolean sparc64_elf_relocate_section |
| PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); |
| static boolean sparc64_elf_object_p PARAMS ((bfd *)); |
| |
| /* The relocation "howto" table. */ |
| |
| static bfd_reloc_status_type sparc_elf_notsup_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type sparc_elf_wdisp16_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type sparc_elf_hix22_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| static bfd_reloc_status_type sparc_elf_lox10_reloc |
| PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| |
| static reloc_howto_type sparc64_elf_howto_table[] = |
| { |
| HOWTO(R_SPARC_NONE, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false,0,0x00000000,true), |
| HOWTO(R_SPARC_8, 0,0, 8,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_8", false,0,0x000000ff,true), |
| HOWTO(R_SPARC_16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_16", false,0,0x0000ffff,true), |
| HOWTO(R_SPARC_32, 0,2,32,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_32", false,0,0xffffffff,true), |
| HOWTO(R_SPARC_DISP8, 0,0, 8,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", false,0,0x000000ff,true), |
| HOWTO(R_SPARC_DISP16, 0,1,16,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", false,0,0x0000ffff,true), |
| HOWTO(R_SPARC_DISP32, 0,2,32,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", false,0,0x00ffffff,true), |
| HOWTO(R_SPARC_WDISP30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", false,0,0x3fffffff,true), |
| HOWTO(R_SPARC_WDISP22, 2,2,22,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", false,0,0x003fffff,true), |
| HOWTO(R_SPARC_HI22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", false,0,0x003fffff,true), |
| HOWTO(R_SPARC_22, 0,2,22,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_22", false,0,0x003fffff,true), |
| HOWTO(R_SPARC_13, 0,2,13,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_13", false,0,0x00001fff,true), |
| HOWTO(R_SPARC_LO10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", false,0,0x000003ff,true), |
| HOWTO(R_SPARC_GOT10, 0,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT10", false,0,0x000003ff,true), |
| HOWTO(R_SPARC_GOT13, 0,2,13,false,0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_GOT13", false,0,0x00001fff,true), |
| HOWTO(R_SPARC_GOT22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GOT22", false,0,0x003fffff,true), |
| HOWTO(R_SPARC_PC10, 0,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC10", false,0,0x000003ff,true), |
| HOWTO(R_SPARC_PC22, 10,2,22,true, 0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_PC22", false,0,0x003fffff,true), |
| HOWTO(R_SPARC_WPLT30, 2,2,30,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WPLT30", false,0,0x3fffffff,true), |
| HOWTO(R_SPARC_COPY, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", false,0,0x00000000,true), |
| HOWTO(R_SPARC_GLOB_DAT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GLOB_DAT",false,0,0x00000000,true), |
| HOWTO(R_SPARC_JMP_SLOT, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_JMP_SLOT",false,0,0x00000000,true), |
| HOWTO(R_SPARC_RELATIVE, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE",false,0,0x00000000,true), |
| HOWTO(R_SPARC_UA32, 0,0,00,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UA32", false,0,0x00000000,true), |
| #ifndef SPARC64_OLD_RELOCS |
| /* These aren't implemented yet. */ |
| HOWTO(R_SPARC_PLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PLT32", false,0,0x00000000,true), |
| HOWTO(R_SPARC_HIPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_HIPLT22", false,0,0x00000000,true), |
| HOWTO(R_SPARC_LOPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_LOPLT10", false,0,0x00000000,true), |
| HOWTO(R_SPARC_PCPLT32, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT32", false,0,0x00000000,true), |
| HOWTO(R_SPARC_PCPLT22, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT22", false,0,0x00000000,true), |
| HOWTO(R_SPARC_PCPLT10, 0,0,00,false,0,complain_overflow_dont, sparc_elf_notsup_reloc, "R_SPARC_PCPLT10", false,0,0x00000000,true), |
| #endif |
| HOWTO(R_SPARC_10, 0,2,10,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_10", false,0,0x000003ff,true), |
| HOWTO(R_SPARC_11, 0,2,11,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_11", false,0,0x000007ff,true), |
| HOWTO(R_SPARC_64, 0,4,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_64", false,0,MINUS_ONE, true), |
| HOWTO(R_SPARC_OLO10, 0,2,13,false,0,complain_overflow_signed, sparc_elf_notsup_reloc, "R_SPARC_OLO10", false,0,0x00001fff,true), |
| HOWTO(R_SPARC_HH22, 42,2,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_HH22", false,0,0x003fffff,true), |
| HOWTO(R_SPARC_HM10, 32,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HM10", false,0,0x000003ff,true), |
| HOWTO(R_SPARC_LM22, 10,2,22,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LM22", false,0,0x003fffff,true), |
| HOWTO(R_SPARC_PC_HH22, 42,2,22,true, 0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_PC_HH22", false,0,0x003fffff,true), |
| HOWTO(R_SPARC_PC_HM10, 32,2,10,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_HM10", false,0,0x000003ff,true), |
| HOWTO(R_SPARC_PC_LM22, 10,2,22,true, 0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_PC_LM22", false,0,0x003fffff,true), |
| HOWTO(R_SPARC_WDISP16, 2,2,16,true, 0,complain_overflow_signed, sparc_elf_wdisp16_reloc,"R_SPARC_WDISP16", false,0,0x00000000,true), |
| HOWTO(R_SPARC_WDISP19, 2,2,19,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", false,0,0x0007ffff,true), |
| HOWTO(R_SPARC_UNUSED_42, 0,0, 0,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UNUSED_42",false,0,0x00000000,true), |
| HOWTO(R_SPARC_7, 0,2, 7,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_7", false,0,0x0000007f,true), |
| HOWTO(R_SPARC_5, 0,2, 5,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_5", false,0,0x0000001f,true), |
| HOWTO(R_SPARC_6, 0,2, 6,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_6", false,0,0x0000003f,true), |
| HOWTO(R_SPARC_DISP64, 0,4,64,true, 0,complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP64", false,0,MINUS_ONE, true), |
| HOWTO(R_SPARC_PLT64, 0,4,64,false,0,complain_overflow_bitfield,sparc_elf_notsup_reloc, "R_SPARC_PLT64", false,0,MINUS_ONE, false), |
| HOWTO(R_SPARC_HIX22, 0,4, 0,false,0,complain_overflow_bitfield,sparc_elf_hix22_reloc, "R_SPARC_HIX22", false,0,MINUS_ONE, false), |
| HOWTO(R_SPARC_LOX10, 0,4, 0,false,0,complain_overflow_dont, sparc_elf_lox10_reloc, "R_SPARC_LOX10", false,0,MINUS_ONE, false), |
| HOWTO(R_SPARC_H44, 22,2,22,false,0,complain_overflow_unsigned,bfd_elf_generic_reloc, "R_SPARC_H44", false,0,0x003fffff,false), |
| HOWTO(R_SPARC_M44, 12,2,10,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_M44", false,0,0x000003ff,false), |
| HOWTO(R_SPARC_L44, 0,2,13,false,0,complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_L44", false,0,0x00000fff,false), |
| HOWTO(R_SPARC_REGISTER, 0,4, 0,false,0,complain_overflow_bitfield,sparc_elf_notsup_reloc, "R_SPARC_REGISTER",false,0,MINUS_ONE, false), |
| HOWTO(R_SPARC_UA64, 0,4,64,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA64", false,0,MINUS_ONE, true), |
| HOWTO(R_SPARC_UA16, 0,1,16,false,0,complain_overflow_bitfield,bfd_elf_generic_reloc, "R_SPARC_UA16", false,0,0x0000ffff,true) |
| }; |
| |
| struct elf_reloc_map { |
| bfd_reloc_code_real_type bfd_reloc_val; |
| unsigned char elf_reloc_val; |
| }; |
| |
| static CONST struct elf_reloc_map sparc_reloc_map[] = |
| { |
| { BFD_RELOC_NONE, R_SPARC_NONE, }, |
| { BFD_RELOC_16, R_SPARC_16, }, |
| { BFD_RELOC_8, R_SPARC_8 }, |
| { BFD_RELOC_8_PCREL, R_SPARC_DISP8 }, |
| { BFD_RELOC_CTOR, R_SPARC_64 }, |
| { BFD_RELOC_32, R_SPARC_32 }, |
| { BFD_RELOC_32_PCREL, R_SPARC_DISP32 }, |
| { BFD_RELOC_HI22, R_SPARC_HI22 }, |
| { BFD_RELOC_LO10, R_SPARC_LO10, }, |
| { BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30 }, |
| { BFD_RELOC_SPARC22, R_SPARC_22 }, |
| { BFD_RELOC_SPARC13, R_SPARC_13 }, |
| { BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10 }, |
| { BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13 }, |
| { BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22 }, |
| { BFD_RELOC_SPARC_PC10, R_SPARC_PC10 }, |
| { BFD_RELOC_SPARC_PC22, R_SPARC_PC22 }, |
| { BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30 }, |
| { BFD_RELOC_SPARC_COPY, R_SPARC_COPY }, |
| { BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT }, |
| { BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT }, |
| { BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE }, |
| { BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22 }, |
| /* ??? Doesn't dwarf use this? */ |
| /*{ BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */ |
| {BFD_RELOC_SPARC_10, R_SPARC_10}, |
| {BFD_RELOC_SPARC_11, R_SPARC_11}, |
| {BFD_RELOC_SPARC_64, R_SPARC_64}, |
| {BFD_RELOC_SPARC_OLO10, R_SPARC_OLO10}, |
| {BFD_RELOC_SPARC_HH22, R_SPARC_HH22}, |
| {BFD_RELOC_SPARC_HM10, R_SPARC_HM10}, |
| {BFD_RELOC_SPARC_LM22, R_SPARC_LM22}, |
| {BFD_RELOC_SPARC_PC_HH22, R_SPARC_PC_HH22}, |
| {BFD_RELOC_SPARC_PC_HM10, R_SPARC_PC_HM10}, |
| {BFD_RELOC_SPARC_PC_LM22, R_SPARC_PC_LM22}, |
| {BFD_RELOC_SPARC_WDISP16, R_SPARC_WDISP16}, |
| {BFD_RELOC_SPARC_WDISP19, R_SPARC_WDISP19}, |
| {BFD_RELOC_SPARC_7, R_SPARC_7}, |
| {BFD_RELOC_SPARC_5, R_SPARC_5}, |
| {BFD_RELOC_SPARC_6, R_SPARC_6}, |
| {BFD_RELOC_SPARC_DISP64, R_SPARC_DISP64}, |
| {BFD_RELOC_SPARC_PLT64, R_SPARC_PLT64}, |
| {BFD_RELOC_SPARC_HIX22, R_SPARC_HIX22}, |
| {BFD_RELOC_SPARC_LOX10, R_SPARC_LOX10}, |
| {BFD_RELOC_SPARC_H44, R_SPARC_H44}, |
| {BFD_RELOC_SPARC_M44, R_SPARC_M44}, |
| {BFD_RELOC_SPARC_L44, R_SPARC_L44}, |
| {BFD_RELOC_SPARC_REGISTER, R_SPARC_REGISTER} |
| }; |
| |
| static reloc_howto_type * |
| sparc64_elf_reloc_type_lookup (abfd, code) |
| bfd *abfd; |
| bfd_reloc_code_real_type code; |
| { |
| unsigned int i; |
| for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct elf_reloc_map); i++) |
| { |
| if (sparc_reloc_map[i].bfd_reloc_val == code) |
| return &sparc64_elf_howto_table[(int) sparc_reloc_map[i].elf_reloc_val]; |
| } |
| return 0; |
| } |
| |
| static void |
| sparc64_elf_info_to_howto (abfd, cache_ptr, dst) |
| bfd *abfd; |
| arelent *cache_ptr; |
| Elf64_Internal_Rela *dst; |
| { |
| BFD_ASSERT (ELF64_R_TYPE (dst->r_info) < (unsigned int) R_SPARC_max); |
| cache_ptr->howto = &sparc64_elf_howto_table[ELF64_R_TYPE (dst->r_info)]; |
| } |
| |
| /* Utility for performing the standard initial work of an instruction |
| relocation. |
| *PRELOCATION will contain the relocated item. |
| *PINSN will contain the instruction from the input stream. |
| If the result is `bfd_reloc_other' the caller can continue with |
| performing the relocation. Otherwise it must stop and return the |
| value to its caller. */ |
| |
| static bfd_reloc_status_type |
| init_insn_reloc (abfd, |
| reloc_entry, |
| symbol, |
| data, |
| input_section, |
| output_bfd, |
| prelocation, |
| pinsn) |
| bfd *abfd; |
| arelent *reloc_entry; |
| asymbol *symbol; |
| PTR data; |
| asection *input_section; |
| bfd *output_bfd; |
| bfd_vma *prelocation; |
| bfd_vma *pinsn; |
| { |
| bfd_vma relocation; |
| reloc_howto_type *howto = reloc_entry->howto; |
| |
| if (output_bfd != (bfd *) NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 |
| && (! howto->partial_inplace |
| || reloc_entry->addend == 0)) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| /* This works because partial_inplace == false. */ |
| if (output_bfd != NULL) |
| return bfd_reloc_continue; |
| |
| if (reloc_entry->address > input_section->_cooked_size) |
| return bfd_reloc_outofrange; |
| |
| relocation = (symbol->value |
| + symbol->section->output_section->vma |
| + symbol->section->output_offset); |
| relocation += reloc_entry->addend; |
| if (howto->pc_relative) |
| { |
| relocation -= (input_section->output_section->vma |
| + input_section->output_offset); |
| relocation -= reloc_entry->address; |
| } |
| |
| *prelocation = relocation; |
| *pinsn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); |
| return bfd_reloc_other; |
| } |
| |
| /* For unsupported relocs. */ |
| |
| static bfd_reloc_status_type |
| sparc_elf_notsup_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; |
| { |
| return bfd_reloc_notsupported; |
| } |
| |
| /* Handle the WDISP16 reloc. */ |
| |
| static bfd_reloc_status_type |
| sparc_elf_wdisp16_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 relocation; |
| bfd_vma insn; |
| bfd_reloc_status_type status; |
| |
| status = init_insn_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, &relocation, &insn); |
| if (status != bfd_reloc_other) |
| return status; |
| |
| insn = (insn & ~0x303fff) | ((((relocation >> 2) & 0xc000) << 6) |
| | ((relocation >> 2) & 0x3fff)); |
| bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); |
| |
| if ((bfd_signed_vma) relocation < - 0x40000 |
| || (bfd_signed_vma) relocation > 0x3ffff) |
| return bfd_reloc_overflow; |
| else |
| return bfd_reloc_ok; |
| } |
| |
| /* Handle the HIX22 reloc. */ |
| |
| static bfd_reloc_status_type |
| sparc_elf_hix22_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 relocation; |
| bfd_vma insn; |
| bfd_reloc_status_type status; |
| |
| status = init_insn_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, &relocation, &insn); |
| if (status != bfd_reloc_other) |
| return status; |
| |
| relocation ^= MINUS_ONE; |
| insn = (insn & ~0x3fffff) | ((relocation >> 10) & 0x3fffff); |
| bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); |
| |
| if ((relocation & ~ (bfd_vma) 0xffffffff) != 0) |
| return bfd_reloc_overflow; |
| else |
| return bfd_reloc_ok; |
| } |
| |
| /* Handle the LOX10 reloc. */ |
| |
| static bfd_reloc_status_type |
| sparc_elf_lox10_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 relocation; |
| bfd_vma insn; |
| bfd_reloc_status_type status; |
| |
| status = init_insn_reloc (abfd, reloc_entry, symbol, data, |
| input_section, output_bfd, &relocation, &insn); |
| if (status != bfd_reloc_other) |
| return status; |
| |
| insn = (insn & ~0x1fff) | 0x1c00 | (relocation & 0x3ff); |
| bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); |
| |
| return bfd_reloc_ok; |
| } |
| |
| /* PLT/GOT stuff */ |
| |
| /* Both the headers and the entries are icache aligned. */ |
| #define PLT_ENTRY_SIZE 32 |
| #define PLT_HEADER_SIZE (4 * PLT_ENTRY_SIZE) |
| #define LARGE_PLT_THRESHOLD 32768 |
| #define GOT_RESERVED_ENTRIES 1 |
| |
| #define ELF_DYNAMIC_INTERPRETER "/usr/lib/sparcv9/ld.so.1" |
| |
| |
| /* Fill in the .plt section. */ |
| |
| static void |
| sparc64_elf_build_plt (output_bfd, contents, nentries) |
| bfd *output_bfd; |
| unsigned char *contents; |
| int nentries; |
| { |
| const unsigned int nop = 0x01000000; |
| int i, j; |
| |
| /* The first four entries are reserved, and are initially undefined. |
| We fill them with `illtrap 0' to force ld.so to do something. */ |
| |
| for (i = 0; i < PLT_HEADER_SIZE/4; ++i) |
| bfd_put_32 (output_bfd, 0, contents+i*4); |
| |
| /* The first 32768 entries are close enough to plt1 to get there via |
| a straight branch. */ |
| |
| for (i = 4; i < LARGE_PLT_THRESHOLD && i < nentries; ++i) |
| { |
| unsigned char *entry = contents + i * PLT_ENTRY_SIZE; |
| unsigned int sethi, ba; |
| |
| /* sethi (. - plt0), %g1 */ |
| sethi = 0x03000000 | (i * PLT_ENTRY_SIZE); |
| |
| /* ba,a,pt %icc, plt1 */ |
| ba = 0x30480000 | (((contents+PLT_ENTRY_SIZE) - (entry+4)) / 4 & 0x7ffff); |
| |
| bfd_put_32 (output_bfd, sethi, entry); |
| bfd_put_32 (output_bfd, ba, entry+4); |
| bfd_put_32 (output_bfd, nop, entry+8); |
| bfd_put_32 (output_bfd, nop, entry+12); |
| bfd_put_32 (output_bfd, nop, entry+16); |
| bfd_put_32 (output_bfd, nop, entry+20); |
| bfd_put_32 (output_bfd, nop, entry+24); |
| bfd_put_32 (output_bfd, nop, entry+28); |
| } |
| |
| /* Now the tricky bit. Entries 32768 and higher are grouped in blocks of |
| 160: 160 entries and 160 pointers. This is to separate code from data, |
| which is much friendlier on the cache. */ |
| |
| for (; i < nentries; i += 160) |
| { |
| int block = (i + 160 <= nentries ? 160 : nentries - i); |
| for (j = 0; j < block; ++j) |
| { |
| unsigned char *entry, *ptr; |
| unsigned int ldx; |
| |
| entry = contents + i*PLT_ENTRY_SIZE + j*4*6; |
| ptr = contents + i*PLT_ENTRY_SIZE + block*4*6 + j*8; |
| |
| /* ldx [%o7 + ptr - entry+4], %g1 */ |
| ldx = 0xc25be000 | ((ptr - entry+4) & 0x1fff); |
| |
| bfd_put_32 (output_bfd, 0x8a10000f, entry); /* mov %o7,%g5 */ |
| bfd_put_32 (output_bfd, 0x40000002, entry+4); /* call .+8 */ |
| bfd_put_32 (output_bfd, nop, entry+8); /* nop */ |
| bfd_put_32 (output_bfd, ldx, entry+12); /* ldx [%o7+P],%g1 */ |
| bfd_put_32 (output_bfd, 0x83c3c001, entry+16); /* jmpl %o7+%g1,%g1 */ |
| bfd_put_32 (output_bfd, 0x9e100005, entry+20); /* mov %g5,%o7 */ |
| |
| bfd_put_64 (output_bfd, contents - entry+4, ptr); |
| } |
| } |
| } |
| |
| /* Return the offset of a particular plt entry within the .plt section. */ |
| |
| static bfd_vma |
| sparc64_elf_plt_entry_offset (index) |
| int index; |
| { |
| int block, ofs; |
| |
| if (index < LARGE_PLT_THRESHOLD) |
| return index * PLT_ENTRY_SIZE; |
| |
| /* See above for details. */ |
| |
| block = (index - LARGE_PLT_THRESHOLD) / 160; |
| ofs = (index - LARGE_PLT_THRESHOLD) % 160; |
| |
| return ((bfd_vma)(LARGE_PLT_THRESHOLD + block*160) * PLT_ENTRY_SIZE |
| + ofs * 6*4); |
| } |
| |
| static bfd_vma |
| sparc64_elf_plt_ptr_offset (index, max) |
| int index, max; |
| { |
| int block, ofs, last; |
| |
| BFD_ASSERT(index >= LARGE_PLT_THRESHOLD); |
| |
| /* See above for details. */ |
| |
| block = (index - LARGE_PLT_THRESHOLD) / 160; |
| ofs = (index - LARGE_PLT_THRESHOLD) % 160; |
| last = (max - LARGE_PLT_THRESHOLD) % 160; |
| |
| return ((LARGE_PLT_THRESHOLD + block*160) * PLT_ENTRY_SIZE |
| + last * 6*4 |
| + ofs * 8); |
| } |
| |
| |
| |
| /* Look through the relocs for a section during the first phase, and |
| allocate space in the global offset table or procedure linkage |
| table. */ |
| |
| static boolean |
| sparc64_elf_check_relocs (abfd, info, sec, relocs) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| asection *sec; |
| const Elf_Internal_Rela *relocs; |
| { |
| bfd *dynobj; |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes; |
| bfd_vma *local_got_offsets; |
| const Elf_Internal_Rela *rel; |
| const Elf_Internal_Rela *rel_end; |
| asection *sgot; |
| asection *srelgot; |
| asection *sreloc; |
| |
| if (info->relocateable || !(sec->flags & SEC_ALLOC)) |
| return true; |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (abfd); |
| local_got_offsets = elf_local_got_offsets (abfd); |
| |
| sgot = NULL; |
| srelgot = NULL; |
| sreloc = NULL; |
| |
| rel_end = relocs + sec->reloc_count; |
| for (rel = relocs; rel < rel_end; rel++) |
| { |
| unsigned long r_symndx; |
| struct elf_link_hash_entry *h; |
| |
| 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]; |
| |
| switch (ELF64_R_TYPE (rel->r_info)) |
| { |
| case R_SPARC_GOT10: |
| case R_SPARC_GOT13: |
| case R_SPARC_GOT22: |
| /* This symbol requires a global offset table entry. */ |
| |
| if (dynobj == NULL) |
| { |
| /* Create the .got section. */ |
| elf_hash_table (info)->dynobj = dynobj = abfd; |
| if (! _bfd_elf_create_got_section (dynobj, info)) |
| return false; |
| } |
| |
| if (sgot == NULL) |
| { |
| sgot = bfd_get_section_by_name (dynobj, ".got"); |
| BFD_ASSERT (sgot != NULL); |
| } |
| |
| if (srelgot == NULL && (h != NULL || info->shared)) |
| { |
| srelgot = bfd_get_section_by_name (dynobj, ".rela.got"); |
| if (srelgot == NULL) |
| { |
| srelgot = bfd_make_section (dynobj, ".rela.got"); |
| if (srelgot == NULL |
| || ! bfd_set_section_flags (dynobj, srelgot, |
| (SEC_ALLOC |
| | SEC_LOAD |
| | SEC_HAS_CONTENTS |
| | SEC_IN_MEMORY |
| | SEC_LINKER_CREATED |
| | SEC_READONLY)) |
| || ! bfd_set_section_alignment (dynobj, srelgot, 3)) |
| return false; |
| } |
| } |
| |
| if (h != NULL) |
| { |
| if (h->got.offset != (bfd_vma) -1) |
| { |
| /* We have already allocated space in the .got. */ |
| break; |
| } |
| h->got.offset = sgot->_raw_size; |
| |
| /* Make sure this symbol is output as a dynamic symbol. */ |
| if (h->dynindx == -1) |
| { |
| if (! bfd_elf64_link_record_dynamic_symbol (info, h)) |
| return false; |
| } |
| |
| srelgot->_raw_size += sizeof (Elf64_External_Rela); |
| } |
| else |
| { |
| /* This is a global offset table entry for a local |
| symbol. */ |
| if (local_got_offsets == NULL) |
| { |
| size_t size; |
| register unsigned int i; |
| |
| size = symtab_hdr->sh_info * sizeof (bfd_vma); |
| local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size); |
| if (local_got_offsets == NULL) |
| return false; |
| elf_local_got_offsets (abfd) = local_got_offsets; |
| for (i = 0; i < symtab_hdr->sh_info; i++) |
| local_got_offsets[i] = (bfd_vma) -1; |
| } |
| if (local_got_offsets[r_symndx] != (bfd_vma) -1) |
| { |
| /* We have already allocated space in the .got. */ |
| break; |
| } |
| local_got_offsets[r_symndx] = sgot->_raw_size; |
| |
| if (info->shared) |
| { |
| /* If we are generating a shared object, we need to |
| output a R_SPARC_RELATIVE reloc so that the |
| dynamic linker can adjust this GOT entry. */ |
| srelgot->_raw_size += sizeof (Elf64_External_Rela); |
| } |
| } |
| |
| sgot->_raw_size += 8; |
| |
| #if 0 |
| /* Doesn't work for 64-bit -fPIC, since sethi/or builds |
| unsigned numbers. If we permit ourselves to modify |
| code so we get sethi/xor, this could work. |
| Question: do we consider conditionally re-enabling |
| this for -fpic, once we know about object code models? */ |
| /* If the .got section is more than 0x1000 bytes, we add |
| 0x1000 to the value of _GLOBAL_OFFSET_TABLE_, so that 13 |
| bit relocations have a greater chance of working. */ |
| if (sgot->_raw_size >= 0x1000 |
| && elf_hash_table (info)->hgot->root.u.def.value == 0) |
| elf_hash_table (info)->hgot->root.u.def.value = 0x1000; |
| #endif |
| |
| break; |
| |
| case R_SPARC_WPLT30: |
| case R_SPARC_PLT32: |
| case R_SPARC_HIPLT22: |
| case R_SPARC_LOPLT10: |
| case R_SPARC_PCPLT32: |
| case R_SPARC_PCPLT22: |
| case R_SPARC_PCPLT10: |
| case R_SPARC_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; |
| } |
| |
| /* Make sure this symbol is output as a dynamic symbol. */ |
| if (h->dynindx == -1) |
| { |
| if (! bfd_elf64_link_record_dynamic_symbol (info, h)) |
| return false; |
| } |
| |
| h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
| break; |
| |
| case R_SPARC_PC10: |
| case R_SPARC_PC22: |
| case R_SPARC_PC_HH22: |
| case R_SPARC_PC_HM10: |
| case R_SPARC_PC_LM22: |
| if (h != NULL |
| && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) |
| break; |
| /* Fall through. */ |
| case R_SPARC_DISP8: |
| case R_SPARC_DISP16: |
| case R_SPARC_DISP32: |
| case R_SPARC_DISP64: |
| case R_SPARC_WDISP30: |
| case R_SPARC_WDISP22: |
| case R_SPARC_WDISP19: |
| case R_SPARC_WDISP16: |
| if (h == NULL) |
| break; |
| /* Fall through. */ |
| case R_SPARC_8: |
| case R_SPARC_16: |
| case R_SPARC_32: |
| case R_SPARC_HI22: |
| case R_SPARC_22: |
| case R_SPARC_13: |
| case R_SPARC_LO10: |
| case R_SPARC_UA32: |
| case R_SPARC_10: |
| case R_SPARC_11: |
| case R_SPARC_64: |
| case R_SPARC_OLO10: |
| case R_SPARC_HH22: |
| case R_SPARC_HM10: |
| case R_SPARC_LM22: |
| case R_SPARC_7: |
| case R_SPARC_5: |
| case R_SPARC_6: |
| case R_SPARC_HIX22: |
| case R_SPARC_LOX10: |
| case R_SPARC_H44: |
| case R_SPARC_M44: |
| case R_SPARC_L44: |
| case R_SPARC_UA64: |
| case R_SPARC_UA16: |
| /* When creating a shared object, we must copy these relocs |
| into the output file. We create a reloc section in |
| dynobj and make room for the reloc. |
| |
| But don't do this for debugging sections -- this shows up |
| with DWARF2 -- first because they are not loaded, and |
| second because DWARF sez the debug info is not to be |
| biased by the load address. */ |
| if (info->shared && (sec->flags & SEC_ALLOC)) |
| { |
| if (sreloc == NULL) |
| { |
| const char *name; |
| |
| 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; |
| |
| BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| && strcmp (bfd_get_section_name (abfd, sec), |
| name + 5) == 0); |
| |
| 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; |
| } |
| } |
| |
| sreloc->_raw_size += sizeof (Elf64_External_Rela); |
| } |
| break; |
| |
| case R_SPARC_REGISTER: |
| /* Nothing to do. */ |
| break; |
| |
| default: |
| (*_bfd_error_handler)(_("%s: check_relocs: unhandled reloc type %d"), |
| bfd_get_filename(abfd), |
| ELF64_R_TYPE (rel->r_info)); |
| return false; |
| } |
| } |
| |
| 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 boolean |
| sparc64_elf_adjust_dynamic_symbol (info, h) |
| struct bfd_link_info *info; |
| struct elf_link_hash_entry *h; |
| { |
| bfd *dynobj; |
| asection *s; |
| unsigned int power_of_two; |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| |
| /* Make sure we know what is going on here. */ |
| BFD_ASSERT (dynobj != NULL |
| && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) |
| || h->weakdef != NULL |
| || ((h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_DYNAMIC) != 0 |
| && (h->elf_link_hash_flags |
| & ELF_LINK_HASH_REF_REGULAR) != 0 |
| && (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0))); |
| |
| /* If this is a function, put it in the procedure linkage table. We |
| will fill in the contents of the procedure linkage table later |
| (although we could actually do it here). The STT_NOTYPE |
| condition is a hack specifically for the Oracle libraries |
| delivered for Solaris; for some inexplicable reason, they define |
| some of their functions as STT_NOTYPE when they really should be |
| STT_FUNC. */ |
| if (h->type == STT_FUNC |
| || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0 |
| || (h->type == STT_NOTYPE |
| && (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| && (h->root.u.def.section->flags & SEC_CODE) != 0)) |
| { |
| if (! elf_hash_table (info)->dynamic_sections_created) |
| { |
| /* This case can occur if we saw a WPLT30 reloc in an input |
| file, but none of the input files were dynamic objects. |
| In such a case, we don't actually need to build a |
| procedure linkage table, and we can just do a WDISP30 |
| reloc instead. */ |
| BFD_ASSERT ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0); |
| return true; |
| } |
| |
| s = bfd_get_section_by_name (dynobj, ".plt"); |
| BFD_ASSERT (s != NULL); |
| |
| /* The first four bit in .plt is reserved. */ |
| if (s->_raw_size == 0) |
| s->_raw_size = PLT_HEADER_SIZE; |
| |
| /* If this symbol is not defined in a regular file, and we are |
| not generating a shared library, then set the symbol to this |
| location in the .plt. This is required to make function |
| pointers compare as equal between the normal executable and |
| the shared library. */ |
| if (! info->shared |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| { |
| h->root.u.def.section = s; |
| h->root.u.def.value = s->_raw_size; |
| } |
| |
| /* To simplify matters later, just store the plt index here. */ |
| h->plt.offset = s->_raw_size / PLT_ENTRY_SIZE; |
| |
| /* Make room for this entry. */ |
| s->_raw_size += PLT_ENTRY_SIZE; |
| |
| /* We also need to make an entry in the .rela.plt section. */ |
| |
| s = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| BFD_ASSERT (s != NULL); |
| |
| /* The first plt entries are reserved, and the relocations must |
| pair up exactly. */ |
| if (s->_raw_size == 0) |
| s->_raw_size += (PLT_HEADER_SIZE/PLT_ENTRY_SIZE |
| * sizeof (Elf64_External_Rela)); |
| |
| s->_raw_size += sizeof (Elf64_External_Rela); |
| |
| /* The procedure linkage table size is bounded by the magnitude |
| of the offset we can describe in the entry. */ |
| if (s->_raw_size >= (bfd_vma)1 << 32) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* 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; |
| 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; |
| |
| /* 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. */ |
| |
| s = bfd_get_section_by_name (dynobj, ".dynbss"); |
| BFD_ASSERT (s != NULL); |
| |
| /* We must generate a R_SPARC_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 |
| .rel.bss section we are going to use. */ |
| if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
| { |
| asection *srel; |
| |
| srel = bfd_get_section_by_name (dynobj, ".rela.bss"); |
| BFD_ASSERT (srel != NULL); |
| srel->_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. 16-bytes is the size |
| of the largest type that requires hard alignment -- long double. */ |
| power_of_two = bfd_log2 (h->size); |
| if (power_of_two > 4) |
| power_of_two = 4; |
| |
| /* Apply the required alignment. */ |
| s->_raw_size = BFD_ALIGN (s->_raw_size, |
| (bfd_size_type) (1 << power_of_two)); |
| if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
| { |
| if (! bfd_set_section_alignment (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; |
| } |
| |
| /* Set the sizes of the dynamic sections. */ |
| |
| static boolean |
| sparc64_elf_size_dynamic_sections (output_bfd, info) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| { |
| bfd *dynobj; |
| asection *s; |
| boolean reltext; |
| boolean relplt; |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| BFD_ASSERT (dynobj != NULL); |
| |
| if (elf_hash_table (info)->dynamic_sections_created) |
| { |
| /* Set the contents of the .interp section to the interpreter. */ |
| if (! info->shared) |
| { |
| s = bfd_get_section_by_name (dynobj, ".interp"); |
| BFD_ASSERT (s != NULL); |
| s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; |
| s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| } |
| } |
| else |
| { |
| /* We may have created entries in the .rela.got section. |
| However, if we are not creating the dynamic sections, we will |
| not actually use these entries. Reset the size of .rela.got, |
| which will cause it to get stripped from the output file |
| below. */ |
| s = bfd_get_section_by_name (dynobj, ".rela.got"); |
| if (s != NULL) |
| s->_raw_size = 0; |
| } |
| |
| /* The check_relocs and adjust_dynamic_symbol entry points have |
| determined the sizes of the various dynamic sections. Allocate |
| memory for them. */ |
| reltext = false; |
| relplt = false; |
| for (s = dynobj->sections; s != NULL; s = s->next) |
| { |
| const char *name; |
| boolean strip; |
| |
| if ((s->flags & SEC_LINKER_CREATED) == 0) |
| continue; |
| |
| /* It's OK to base decisions on the section name, because none |
| of the dynobj section names depend upon the input files. */ |
| name = bfd_get_section_name (dynobj, s); |
| |
| strip = false; |
| |
| if (strncmp (name, ".rela", 5) == 0) |
| { |
| if (s->_raw_size == 0) |
| { |
| /* If we don't need this section, strip it from the |
| output file. This is to handle .rela.bss and |
| .rel.plt. We must create it in |
| create_dynamic_sections, because it 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. */ |
| strip = true; |
| } |
| else |
| { |
| const char *outname; |
| asection *target; |
| |
| /* If this relocation section applies to a read only |
| section, then we probably need a DT_TEXTREL entry. */ |
| outname = bfd_get_section_name (output_bfd, |
| s->output_section); |
| target = bfd_get_section_by_name (output_bfd, outname + 5); |
| if (target != NULL |
| && (target->flags & SEC_READONLY) != 0) |
| reltext = true; |
| |
| if (strcmp (name, ".rela.plt") == 0) |
| relplt = 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 if (strcmp (name, ".plt") != 0 |
| && strncmp (name, ".got", 4) != 0) |
| { |
| /* It's not one of our sections, so don't allocate space. */ |
| continue; |
| } |
| |
| if (strip) |
| { |
| _bfd_strip_section_from_output (s); |
| continue; |
| } |
| |
| /* Allocate memory for the section contents. Zero the memory |
| for the benefit of .rela.plt, which has 4 unused entries |
| at the beginning, and we don't want garbage. */ |
| s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); |
| if (s->contents == NULL && s->_raw_size != 0) |
| return false; |
| } |
| |
| if (elf_hash_table (info)->dynamic_sections_created) |
| { |
| /* Add some entries to the .dynamic section. We fill in the |
| values later, in sparc64_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. */ |
| if (! info->shared) |
| { |
| if (! bfd_elf64_add_dynamic_entry (info, DT_DEBUG, 0)) |
| return false; |
| } |
| |
| if (relplt) |
| { |
| if (! bfd_elf64_add_dynamic_entry (info, DT_PLTGOT, 0) |
| || ! bfd_elf64_add_dynamic_entry (info, DT_PLTRELSZ, 0) |
| || ! bfd_elf64_add_dynamic_entry (info, DT_PLTREL, DT_RELA) |
| || ! bfd_elf64_add_dynamic_entry (info, DT_JMPREL, 0) |
| || ! bfd_elf64_add_dynamic_entry (info, DT_SPARC_PLTFMT, |
| (info->shared != 0) + 1)) |
| return false; |
| } |
| |
| if (! bfd_elf64_add_dynamic_entry (info, DT_RELA, 0) |
| || ! bfd_elf64_add_dynamic_entry (info, DT_RELASZ, 0) |
| || ! bfd_elf64_add_dynamic_entry (info, DT_RELAENT, |
| sizeof (Elf64_External_Rela))) |
| return false; |
| |
| if (reltext) |
| { |
| if (! bfd_elf64_add_dynamic_entry (info, DT_TEXTREL, 0)) |
| return false; |
| } |
| } |
| |
| /* If we are generating a shared library, we generate a section |
| symbol for each output section for which we might need to copy |
| relocs. These are local symbols, which means that they must come |
| first in the dynamic symbol table. That means we must increment |
| the dynamic symbol index of every other dynamic symbol. */ |
| if (info->shared) |
| { |
| int c; |
| |
| c = 0; |
| for (s = output_bfd->sections; s != NULL; s = s->next) |
| { |
| if ((s->flags & SEC_LINKER_CREATED) != 0 |
| || (s->flags & SEC_ALLOC) == 0) |
| continue; |
| |
| elf_section_data (s)->dynindx = c + 1; |
| |
| /* These symbols will have no names, so we don't need to |
| fiddle with dynstr_index. */ |
| |
| ++c; |
| } |
| |
| elf_link_hash_traverse (elf_hash_table (info), |
| sparc64_elf_adjust_dynindx, |
| (PTR) &c); |
| elf_hash_table (info)->dynsymcount += c; |
| } |
| |
| return true; |
| } |
| |
| /* Increment the index of a dynamic symbol by a given amount. Called |
| via elf_link_hash_traverse. */ |
| |
| static boolean |
| sparc64_elf_adjust_dynindx (h, cparg) |
| struct elf_link_hash_entry *h; |
| PTR cparg; |
| { |
| int *cp = (int *) cparg; |
| |
| if (h->dynindx != -1) |
| h->dynindx += *cp; |
| return true; |
| } |
| |
| |
| /* Relocate a SPARC64 ELF section. */ |
| |
| static boolean |
| sparc64_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; |
| { |
| bfd *dynobj; |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes; |
| bfd_vma *local_got_offsets; |
| bfd_vma got_base; |
| asection *sgot; |
| asection *splt; |
| asection *sreloc; |
| Elf_Internal_Rela *rel; |
| Elf_Internal_Rela *relend; |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (input_bfd); |
| local_got_offsets = elf_local_got_offsets (input_bfd); |
| |
| if (elf_hash_table(info)->hgot == NULL) |
| got_base = 0; |
| else |
| got_base = elf_hash_table (info)->hgot->root.u.def.value; |
| |
| sgot = splt = sreloc = NULL; |
| |
| rel = relocs; |
| relend = relocs + input_section->reloc_count; |
| for (; rel < relend; rel++) |
| { |
| int r_type; |
| reloc_howto_type *howto; |
| long r_symndx; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| asection *sec; |
| bfd_vma relocation; |
| bfd_reloc_status_type r; |
| |
| r_type = ELF64_R_TYPE (rel->r_info); |
| if (r_type < 0 || r_type >= (int) R_SPARC_max) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| howto = sparc64_elf_howto_table + r_type; |
| |
| r_symndx = ELF64_R_SYM (rel->r_info); |
| |
| if (info->relocateable) |
| { |
| /* This is a relocateable link. We don't have to change |
| anything, unless the reloc is against a section symbol, |
| in which case we have to adjust according to where the |
| section symbol winds up in the output section. */ |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| sym = local_syms + r_symndx; |
| if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| { |
| sec = local_sections[r_symndx]; |
| rel->r_addend += sec->output_offset + sym->st_value; |
| } |
| } |
| |
| continue; |
| } |
| |
| /* This is a final link. */ |
| h = NULL; |
| sym = NULL; |
| sec = NULL; |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| sym = local_syms + r_symndx; |
| sec = local_sections[r_symndx]; |
| relocation = (sec->output_section->vma |
| + sec->output_offset |
| + sym->st_value); |
| } |
| else |
| { |
| 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 (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| boolean skip_it = false; |
| sec = h->root.u.def.section; |
| |
| switch (r_type) |
| { |
| case R_SPARC_WPLT30: |
| case R_SPARC_PLT32: |
| case R_SPARC_HIPLT22: |
| case R_SPARC_LOPLT10: |
| case R_SPARC_PCPLT32: |
| case R_SPARC_PCPLT22: |
| case R_SPARC_PCPLT10: |
| case R_SPARC_PLT64: |
| if (h->plt.offset != (bfd_vma) -1) |
| skip_it = true; |
| break; |
| |
| case R_SPARC_GOT10: |
| case R_SPARC_GOT13: |
| case R_SPARC_GOT22: |
| if (elf_hash_table(info)->dynamic_sections_created |
| && (!info->shared |
| || (!info->symbolic && h->dynindx != -1) |
| || !(h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR))) |
| skip_it = true; |
| break; |
| |
| case R_SPARC_PC10: |
| case R_SPARC_PC22: |
| case R_SPARC_PC_HH22: |
| case R_SPARC_PC_HM10: |
| case R_SPARC_PC_LM22: |
| if (!strcmp(h->root.root.string, "_GLOBAL_OFFSET_TABLE_")) |
| break; |
| /* FALLTHRU */ |
| |
| case R_SPARC_8: |
| case R_SPARC_16: |
| case R_SPARC_32: |
| case R_SPARC_DISP8: |
| case R_SPARC_DISP16: |
| case R_SPARC_DISP32: |
| case R_SPARC_WDISP30: |
| case R_SPARC_WDISP22: |
| case R_SPARC_HI22: |
| case R_SPARC_22: |
| case R_SPARC_13: |
| case R_SPARC_LO10: |
| case R_SPARC_UA32: |
| case R_SPARC_10: |
| case R_SPARC_11: |
| case R_SPARC_64: |
| case R_SPARC_OLO10: |
| case R_SPARC_HH22: |
| case R_SPARC_HM10: |
| case R_SPARC_LM22: |
| case R_SPARC_WDISP19: |
| case R_SPARC_WDISP16: |
| case R_SPARC_7: |
| case R_SPARC_5: |
| case R_SPARC_6: |
| case R_SPARC_DISP64: |
| case R_SPARC_HIX22: |
| case R_SPARC_LOX10: |
| case R_SPARC_H44: |
| case R_SPARC_M44: |
| case R_SPARC_L44: |
| case R_SPARC_UA64: |
| case R_SPARC_UA16: |
| if (info->shared |
| && ((!info->symbolic && h->dynindx != -1) |
| || !(h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR))) |
| skip_it = true; |
| break; |
| } |
| |
| if (skip_it) |
| { |
| /* In these cases, we don't need the relocation |
| value. We check specially because in some |
| obscure cases sec->output_section will be NULL. */ |
| relocation = 0; |
| } |
| else |
| { |
| relocation = (h->root.u.def.value |
| + sec->output_section->vma |
| + sec->output_offset); |
| } |
| } |
| else if (h->root.type == bfd_link_hash_undefweak) |
| relocation = 0; |
| else if (info->shared && !info->symbolic && !info->no_undefined) |
| relocation = 0; |
| else |
| { |
| if (! ((*info->callbacks->undefined_symbol) |
| (info, h->root.root.string, input_bfd, |
| input_section, rel->r_offset))) |
| return false; |
| relocation = 0; |
| } |
| } |
| |
| /* When generating a shared object, these relocations are copied |
| into the output file to be resolved at run time. */ |
| if (info->shared && (input_section->flags & SEC_ALLOC)) |
| { |
| switch (r_type) |
| { |
| case R_SPARC_PC10: |
| case R_SPARC_PC22: |
| case R_SPARC_PC_HH22: |
| case R_SPARC_PC_HM10: |
| case R_SPARC_PC_LM22: |
| if (h != NULL |
| && !strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_")) |
| break; |
| /* Fall through. */ |
| case R_SPARC_DISP8: |
| case R_SPARC_DISP16: |
| case R_SPARC_DISP32: |
| case R_SPARC_WDISP30: |
| case R_SPARC_WDISP22: |
| case R_SPARC_WDISP19: |
| case R_SPARC_WDISP16: |
| case R_SPARC_DISP64: |
| if (h == NULL) |
| break; |
| /* Fall through. */ |
| case R_SPARC_8: |
| case R_SPARC_16: |
| case R_SPARC_32: |
| case R_SPARC_HI22: |
| case R_SPARC_22: |
| case R_SPARC_13: |
| case R_SPARC_LO10: |
| case R_SPARC_UA32: |
| case R_SPARC_10: |
| case R_SPARC_11: |
| case R_SPARC_64: |
| case R_SPARC_OLO10: |
| case R_SPARC_HH22: |
| case R_SPARC_HM10: |
| case R_SPARC_LM22: |
| case R_SPARC_7: |
| case R_SPARC_5: |
| case R_SPARC_6: |
| case R_SPARC_HIX22: |
| case R_SPARC_LOX10: |
| case R_SPARC_H44: |
| case R_SPARC_M44: |
| case R_SPARC_L44: |
| case R_SPARC_UA64: |
| case R_SPARC_UA16: |
| { |
| Elf_Internal_Rela outrel; |
| boolean skip; |
| |
| if (sreloc == NULL) |
| { |
| const char *name = |
| (bfd_elf_string_from_elf_section |
| (input_bfd, |
| elf_elfheader (input_bfd)->e_shstrndx, |
| elf_section_data (input_section)->rel_hdr.sh_name)); |
| |
| if (name == NULL) |
| return false; |
| |
| BFD_ASSERT (strncmp (name, ".rela", 5) == 0 |
| && strcmp (bfd_get_section_name(input_bfd, |
| input_section), |
| name + 5) == 0); |
| |
| sreloc = bfd_get_section_by_name (dynobj, name); |
| BFD_ASSERT (sreloc != NULL); |
| } |
| |
| skip = false; |
| |
| if (elf_section_data (input_section)->stab_info == NULL) |
| outrel.r_offset = rel->r_offset; |
| else |
| { |
| bfd_vma off; |
| |
| off = (_bfd_stab_section_offset |
| (output_bfd, &elf_hash_table (info)->stab_info, |
| input_section, |
| &elf_section_data (input_section)->stab_info, |
| rel->r_offset)); |
| if (off == MINUS_ONE) |
| skip = true; |
| outrel.r_offset = off; |
| } |
| |
| outrel.r_offset += (input_section->output_section->vma |
| + input_section->output_offset); |
| |
| /* Optimize unaligned reloc usage now that we know where |
| it finally resides. */ |
| switch (r_type) |
| { |
| case R_SPARC_16: |
| if (outrel.r_offset & 1) r_type = R_SPARC_UA16; |
| break; |
| case R_SPARC_UA16: |
| if (!(outrel.r_offset & 1)) r_type = R_SPARC_16; |
| break; |
| case R_SPARC_32: |
| if (outrel.r_offset & 3) r_type = R_SPARC_UA32; |
| break; |
| case R_SPARC_UA32: |
| if (!(outrel.r_offset & 3)) r_type = R_SPARC_32; |
| break; |
| case R_SPARC_64: |
| if (outrel.r_offset & 7) r_type = R_SPARC_UA64; |
| break; |
| case R_SPARC_UA64: |
| if (!(outrel.r_offset & 7)) r_type = R_SPARC_64; |
| break; |
| } |
| |
| if (skip) |
| memset (&outrel, 0, sizeof outrel); |
| /* h->dynindx may be -1 if the symbol was marked to |
| become local. */ |
| else if (h != NULL |
| && ((! info->symbolic && h->dynindx != -1) |
| || (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR) == 0)) |
| { |
| BFD_ASSERT (h->dynindx != -1); |
| outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
| outrel.r_addend = rel->r_addend; |
| } |
| else |
| { |
| if (r_type == R_SPARC_64) |
| { |
| outrel.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE); |
| outrel.r_addend = relocation + rel->r_addend; |
| } |
| else |
| { |
| long indx; |
| |
| if (h == NULL) |
| sec = local_sections[r_symndx]; |
| else |
| { |
| BFD_ASSERT (h->root.type == bfd_link_hash_defined |
| || (h->root.type |
| == bfd_link_hash_defweak)); |
| sec = h->root.u.def.section; |
| } |
| if (sec != NULL && bfd_is_abs_section (sec)) |
| indx = 0; |
| 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; |
| |
| /* FIXME: we really should be able to link non-pic |
| shared libraries. */ |
| if (indx == 0) |
| { |
| BFD_FAIL (); |
| (*_bfd_error_handler) |
| (_("%s: probably compiled without -fPIC?"), |
| bfd_get_filename (input_bfd)); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| } |
| |
| outrel.r_info = ELF64_R_INFO (indx, r_type); |
| |
| /* For non-RELATIVE dynamic relocations, we keep the |
| same symbol, and so generally the same addend. But |
| we do need to adjust those relocations referencing |
| sections. */ |
| outrel.r_addend = rel->r_addend; |
| if (r_symndx < symtab_hdr->sh_info |
| && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| outrel.r_addend += sec->output_offset+sym->st_value; |
| } |
| } |
| |
| bfd_elf64_swap_reloca_out (output_bfd, &outrel, |
| (((Elf64_External_Rela *) |
| sreloc->contents) |
| + sreloc->reloc_count)); |
| ++sreloc->reloc_count; |
| |
| /* This reloc will be computed at runtime, so there's no |
| need to do anything now, unless this is a RELATIVE |
| reloc in an unallocated section. */ |
| if (skip |
| || (input_section->flags & SEC_ALLOC) != 0 |
| || ELF64_R_TYPE (outrel.r_info) != R_SPARC_RELATIVE) |
| continue; |
| } |
| break; |
| } |
| } |
| |
| switch (r_type) |
| { |
| case R_SPARC_GOT10: |
| case R_SPARC_GOT13: |
| case R_SPARC_GOT22: |
| /* Relocation is to the entry for this symbol in the global |
| offset table. */ |
| if (sgot == NULL) |
| { |
| sgot = bfd_get_section_by_name (dynobj, ".got"); |
| BFD_ASSERT (sgot != NULL); |
| } |
| |
| if (h != NULL) |
| { |
| bfd_vma off = h->got.offset; |
| BFD_ASSERT (off != (bfd_vma) -1); |
| |
| if (! elf_hash_table (info)->dynamic_sections_created |
| || (info->shared |
| && (info->symbolic || h->dynindx == -1) |
| && (h->elf_link_hash_flags |
| & ELF_LINK_HASH_DEF_REGULAR))) |
| { |
| /* 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. We |
| must initialize this entry in the global offset table. |
| Since the offset must always be a multiple of 8, we |
| use the least significant bit to record whether we |
| have initialized it already. |
| |
| When doing a dynamic link, we create a .rela.got |
| relocation entry to initialize the value. This is |
| done in the finish_dynamic_symbol routine. */ |
| |
| if ((off & 1) != 0) |
| off &= ~1; |
| else |
| { |
| bfd_put_64 (output_bfd, relocation, |
| sgot->contents + off); |
| h->got.offset |= 1; |
| } |
| } |
| relocation = sgot->output_offset + off - got_base; |
| } |
| else |
| { |
| bfd_vma off; |
| |
| BFD_ASSERT (local_got_offsets != NULL); |
| off = local_got_offsets[r_symndx]; |
| BFD_ASSERT (off != (bfd_vma) -1); |
| |
| /* The offset must always be a multiple of 8. We use |
| the least significant bit to record whether we have |
| already processed this entry. */ |
| if ((off & 1) != 0) |
| off &= ~1; |
| else |
| { |
| bfd_put_64 (output_bfd, relocation, sgot->contents + off); |
| local_got_offsets[r_symndx] |= 1; |
| |
| if (info->shared) |
| { |
| asection *srelgot; |
| Elf_Internal_Rela outrel; |
| |
| /* We need to generate a R_SPARC_RELATIVE reloc |
| for the dynamic linker. */ |
| srelgot = bfd_get_section_by_name(dynobj, ".rela.got"); |
| BFD_ASSERT (srelgot != NULL); |
| |
| outrel.r_offset = (sgot->output_section->vma |
| + sgot->output_offset |
| + off); |
| outrel.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE); |
| outrel.r_addend = relocation; |
| bfd_elf64_swap_reloca_out (output_bfd, &outrel, |
| (((Elf64_External_Rela *) |
| srelgot->contents) |
| + srelgot->reloc_count)); |
| ++srelgot->reloc_count; |
| } |
| } |
| relocation = sgot->output_offset + off - got_base; |
| } |
| goto do_default; |
| |
| case R_SPARC_WPLT30: |
| case R_SPARC_PLT32: |
| case R_SPARC_HIPLT22: |
| case R_SPARC_LOPLT10: |
| case R_SPARC_PCPLT32: |
| case R_SPARC_PCPLT22: |
| case R_SPARC_PCPLT10: |
| case R_SPARC_PLT64: |
| /* Relocation is to the entry for this symbol in the |
| procedure linkage table. */ |
| BFD_ASSERT (h != NULL); |
| |
| if (h->plt.offset == (bfd_vma) -1) |
| { |
| /* We didn't make a PLT entry for this symbol. This |
| happens when statically linking PIC code, or when |
| using -Bsymbolic. */ |
| goto do_default; |
| } |
| |
| if (splt == NULL) |
| { |
| splt = bfd_get_section_by_name (dynobj, ".plt"); |
| BFD_ASSERT (splt != NULL); |
| } |
| |
| relocation = (splt->output_section->vma |
| + splt->output_offset |
| + sparc64_elf_plt_entry_offset (h->plt.offset)); |
| goto do_default; |
| |
| case R_SPARC_OLO10: |
| { |
| bfd_vma x; |
| |
| relocation += rel->r_addend; |
| relocation = (relocation & 0x3ff) + ELF64_R_TYPE_DATA (rel->r_info); |
| |
| x = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| x = (x & ~0x1fff) | (relocation & 0x1fff); |
| bfd_put_32 (input_bfd, x, contents + rel->r_offset); |
| |
| r = bfd_check_overflow (howto->complain_on_overflow, |
| howto->bitsize, howto->rightshift, |
| bfd_arch_bits_per_address (input_bfd), |
| relocation); |
| } |
| break; |
| |
| case R_SPARC_WDISP16: |
| { |
| bfd_vma x; |
| |
| relocation += rel->r_addend; |
| /* Adjust for pc-relative-ness. */ |
| relocation -= (input_section->output_section->vma |
| + input_section->output_offset); |
| relocation -= rel->r_offset; |
| |
| x = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| x = (x & ~0x303fff) | ((((relocation >> 2) & 0xc000) << 6) |
| | ((relocation >> 2) & 0x3fff)); |
| bfd_put_32 (input_bfd, x, contents + rel->r_offset); |
| |
| r = bfd_check_overflow (howto->complain_on_overflow, |
| howto->bitsize, howto->rightshift, |
| bfd_arch_bits_per_address (input_bfd), |
| relocation); |
| } |
| break; |
| |
| case R_SPARC_HIX22: |
| { |
| bfd_vma x; |
| |
| relocation += rel->r_addend; |
| relocation = relocation ^ MINUS_ONE; |
| |
| x = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| x = (x & ~0x3fffff) | ((relocation >> 10) & 0x3fffff); |
| bfd_put_32 (input_bfd, x, contents + rel->r_offset); |
| |
| r = bfd_check_overflow (howto->complain_on_overflow, |
| howto->bitsize, howto->rightshift, |
| bfd_arch_bits_per_address (input_bfd), |
| relocation); |
| } |
| break; |
| |
| case R_SPARC_LOX10: |
| { |
| bfd_vma x; |
| |
| relocation += rel->r_addend; |
| relocation = (relocation & 0x3ff) | 0x1c00; |
| |
| x = bfd_get_32 (input_bfd, contents + rel->r_offset); |
| x = (x & ~0x1fff) | relocation; |
| bfd_put_32 (input_bfd, x, contents + rel->r_offset); |
| |
| r = bfd_reloc_ok; |
| } |
| break; |
| |
| default: |
| do_default: |
| r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| contents, rel->r_offset, |
| relocation, rel->r_addend); |
| break; |
| } |
| |
| switch (r) |
| { |
| case bfd_reloc_ok: |
| break; |
| |
| default: |
| case bfd_reloc_outofrange: |
| abort (); |
| |
| case bfd_reloc_overflow: |
| { |
| const char *name; |
| |
| if (h != NULL) |
| { |
| if (h->root.type == bfd_link_hash_undefweak |
| && howto->pc_relative) |
| { |
| /* Assume this is a call protected by other code that |
| detect 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. */ |
| break; |
| } |
| |
| name = h->root.root.string; |
| } |
| else |
| { |
| name = (bfd_elf_string_from_elf_section |
| (input_bfd, |
| symtab_hdr->sh_link, |
| sym->st_name)); |
| if (name == NULL) |
| return false; |
| if (*name == '\0') |
| name = bfd_section_name (input_bfd, sec); |
| } |
| if (! ((*info->callbacks->reloc_overflow) |
| (info, name, howto->name, (bfd_vma) 0, |
| input_bfd, input_section, rel->r_offset))) |
| return false; |
| } |
| break; |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Finish up dynamic symbol handling. We set the contents of various |
| dynamic sections here. */ |
| |
| static boolean |
| sparc64_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; |
| { |
| bfd *dynobj; |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| |
| if (h->plt.offset != (bfd_vma) -1) |
| { |
| asection *splt; |
| asection *srela; |
| Elf_Internal_Rela rela; |
| |
| /* This symbol has an entry in the PLT. Set it up. */ |
| |
| BFD_ASSERT (h->dynindx != -1); |
| |
| splt = bfd_get_section_by_name (dynobj, ".plt"); |
| srela = bfd_get_section_by_name (dynobj, ".rela.plt"); |
| BFD_ASSERT (splt != NULL && srela != NULL); |
| |
| /* Fill in the entry in the .rela.plt section. */ |
| |
| if (h->plt.offset < LARGE_PLT_THRESHOLD) |
| { |
| rela.r_offset = sparc64_elf_plt_entry_offset (h->plt.offset); |
| rela.r_addend = 0; |
| } |
| else |
| { |
| int max = splt->_raw_size / PLT_ENTRY_SIZE; |
| rela.r_offset = sparc64_elf_plt_ptr_offset (h->plt.offset, max); |
| rela.r_addend = -(sparc64_elf_plt_entry_offset (h->plt.offset) + 4); |
| } |
| rela.r_offset += (splt->output_section->vma + splt->output_offset); |
| rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_JMP_SLOT); |
| |
| bfd_elf64_swap_reloca_out (output_bfd, &rela, |
| ((Elf64_External_Rela *) srela->contents |
| + h->plt.offset)); |
| |
| if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) |
| { |
| /* Mark the symbol as undefined, rather than as defined in |
| the .plt section. Leave the value alone. */ |
| sym->st_shndx = SHN_UNDEF; |
| } |
| } |
| |
| if (h->got.offset != (bfd_vma) -1) |
| { |
| asection *sgot; |
| asection *srela; |
| Elf_Internal_Rela rela; |
| |
| /* This symbol has an entry in the GOT. Set it up. */ |
| |
| sgot = bfd_get_section_by_name (dynobj, ".got"); |
| srela = bfd_get_section_by_name (dynobj, ".rela.got"); |
| BFD_ASSERT (sgot != NULL && srela != NULL); |
| |
| rela.r_offset = (sgot->output_section->vma |
| + sgot->output_offset |
| + (h->got.offset &~ 1)); |
| |
| /* If this is a -Bsymbolic link, and the symbol is defined |
| locally, we just want to emit a RELATIVE reloc. Likewise if |
| the symbol was forced to be local because of a version file. |
| The entry in the global offset table will already have been |
| initialized in the relocate_section function. */ |
| if (info->shared |
| && (info->symbolic || h->dynindx == -1) |
| && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) |
| { |
| asection *sec = h->root.u.def.section; |
| rela.r_info = ELF64_R_INFO (0, R_SPARC_RELATIVE); |
| rela.r_addend = (h->root.u.def.value |
| + sec->output_section->vma |
| + sec->output_offset); |
| } |
| else |
| { |
| bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
| rela.r_info = ELF64_R_INFO (h->dynindx, R_SPARC_GLOB_DAT); |
| rela.r_addend = 0; |
| } |
| |
| bfd_elf64_swap_reloca_out (output_bfd, &rela, |
| ((Elf64_External_Rela *) srela->contents |
| + srela->reloc_count)); |
| ++srela->reloc_count; |
| } |
| |
| if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) |
| { |
| asection *s; |
| Elf_Internal_Rela rela; |
| |
| /* This symbols needs a copy reloc. Set it up. */ |
| |
| BFD_ASSERT (h->dynindx != -1); |
| |
| s = bfd_get_section_by_name (h->root.u.def.section->owner, |
| ".rela.bss"); |
| BFD_ASSERT (s != NULL); |
| |
| 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_SPARC_COPY); |
| rela.r_addend = 0; |
| bfd_elf64_swap_reloca_out (output_bfd, &rela, |
| ((Elf64_External_Rela *) s->contents |
| + s->reloc_count)); |
| ++s->reloc_count; |
| } |
| |
| /* Mark some specially defined symbols as absolute. */ |
| if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
| || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 |
| || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) |
| sym->st_shndx = SHN_ABS; |
| |
| return true; |
| } |
| |
| /* Finish up the dynamic sections. */ |
| |
| static boolean |
| sparc64_elf_finish_dynamic_sections (output_bfd, info) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| { |
| bfd *dynobj; |
| asection *sdyn; |
| asection *sgot; |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| |
| sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
| |
| if (elf_hash_table (info)->dynamic_sections_created) |
| { |
| asection *splt; |
| Elf64_External_Dyn *dyncon, *dynconend; |
| |
| splt = bfd_get_section_by_name (dynobj, ".plt"); |
| BFD_ASSERT (splt != NULL && sdyn != NULL); |
| |
| dyncon = (Elf64_External_Dyn *) sdyn->contents; |
| dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size); |
| for (; dyncon < dynconend; dyncon++) |
| { |
| Elf_Internal_Dyn dyn; |
| const char *name; |
| boolean size; |
| |
| bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
| |
| switch (dyn.d_tag) |
| { |
| case DT_PLTGOT: name = ".plt"; size = false; break; |
| case DT_PLTRELSZ: name = ".rela.plt"; size = true; break; |
| case DT_JMPREL: name = ".rela.plt"; size = false; break; |
| default: name = NULL; size = false; break; |
| } |
| |
| if (name != NULL) |
| { |
| asection *s; |
| |
| s = bfd_get_section_by_name (output_bfd, name); |
| if (s == NULL) |
| dyn.d_un.d_val = 0; |
| else |
| { |
| if (! size) |
| dyn.d_un.d_ptr = s->vma; |
| else |
| { |
| if (s->_cooked_size != 0) |
| dyn.d_un.d_val = s->_cooked_size; |
| else |
| dyn.d_un.d_val = s->_raw_size; |
| } |
| } |
| bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
| } |
| } |
| |
| /* Initialize the contents of the .plt section. */ |
| if (splt->_raw_size > 0) |
| { |
| sparc64_elf_build_plt(output_bfd, splt->contents, |
| splt->_raw_size / PLT_ENTRY_SIZE); |
| } |
| |
| elf_section_data (splt->output_section)->this_hdr.sh_entsize = |
| PLT_ENTRY_SIZE; |
| } |
| |
| /* Set the first entry in the global offset table to the address of |
| the dynamic section. */ |
| sgot = bfd_get_section_by_name (dynobj, ".got"); |
| BFD_ASSERT (sgot != NULL); |
| if (sgot->_raw_size > 0) |
| { |
| if (sdyn == NULL) |
| bfd_put_64 (output_bfd, (bfd_vma) 0, sgot->contents); |
| else |
| bfd_put_64 (output_bfd, |
| sdyn->output_section->vma + sdyn->output_offset, |
| sgot->contents); |
| } |
| |
| elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 8; |
| |
| if (info->shared) |
| { |
| asection *sdynsym; |
| asection *s; |
| Elf_Internal_Sym sym; |
| int c; |
| |
| /* Set up the section symbols for the output sections. */ |
| |
| sdynsym = bfd_get_section_by_name (dynobj, ".dynsym"); |
| BFD_ASSERT (sdynsym != NULL); |
| |
| sym.st_size = 0; |
| sym.st_name = 0; |
| sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION); |
| sym.st_other = 0; |
| |
| c = 0; |
| for (s = output_bfd->sections; s != NULL; s = s->next) |
| { |
| int indx; |
| |
| if (elf_section_data (s)->dynindx == 0) |
| continue; |
| |
| sym.st_value = s->vma; |
| |
| indx = elf_section_data (s)->this_idx; |
| BFD_ASSERT (indx > 0); |
| sym.st_shndx = indx; |
| |
| bfd_elf64_swap_symbol_out (output_bfd, &sym, |
| (PTR) (((Elf64_External_Sym *) |
| sdynsym->contents) |
| + elf_section_data (s)->dynindx)); |
| |
| ++c; |
| } |
| |
| /* Set the sh_info field of the output .dynsym section to the |
| index of the first global symbol. */ |
| elf_section_data (sdynsym->output_section)->this_hdr.sh_info = c + 1; |
| } |
| |
| return true; |
| } |
| |
| /* Functions for dealing with the e_flags field. */ |
| |
| /* Merge backend specific data from an object file to the output |
| object file when linking. */ |
| |
| static boolean |
| sparc64_elf_merge_private_bfd_data (ibfd, obfd) |
| bfd *ibfd; |
| bfd *obfd; |
| { |
| boolean error; |
| flagword new_flags, old_flags; |
| int new_mm, old_mm; |
| |
| if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| return true; |
| |
| new_flags = elf_elfheader (ibfd)->e_flags; |
| old_flags = elf_elfheader (obfd)->e_flags; |
| |
| if (!elf_flags_init (obfd)) /* First call, no flags set */ |
| { |
| elf_flags_init (obfd) = true; |
| elf_elfheader (obfd)->e_flags = new_flags; |
| } |
| |
| else if (new_flags == old_flags) /* Compatible flags are ok */ |
| ; |
| |
| else /* Incompatible flags */ |
| { |
| error = false; |
| |
| old_flags |= (new_flags & (EF_SPARC_SUN_US1|EF_SPARC_HAL_R1)); |
| new_flags |= (old_flags & (EF_SPARC_SUN_US1|EF_SPARC_HAL_R1)); |
| if ((old_flags & (EF_SPARC_SUN_US1|EF_SPARC_HAL_R1)) == |
| (EF_SPARC_SUN_US1|EF_SPARC_HAL_R1)) |
| { |
| error = true; |
| (*_bfd_error_handler) |
| (_("%s: linking UltraSPARC specific with HAL specific code"), |
| bfd_get_filename (ibfd)); |
| } |
| |
| /* Choose the most restrictive memory ordering */ |
| old_mm = (old_flags & EF_SPARCV9_MM); |
| new_mm = (new_flags & EF_SPARCV9_MM); |
| old_flags &= ~EF_SPARCV9_MM; |
| new_flags &= ~EF_SPARCV9_MM; |
| if (new_mm < old_mm) old_mm = new_mm; |
| old_flags |= old_mm; |
| new_flags |= old_mm; |
| |
| /* Warn about any other mismatches */ |
| if (new_flags != old_flags) |
| { |
| error = true; |
| (*_bfd_error_handler) |
| (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"), |
| bfd_get_filename (ibfd), (long)new_flags, (long)old_flags); |
| } |
| |
| elf_elfheader (obfd)->e_flags = old_flags; |
| |
| if (error) |
| { |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| |
| /* Set the right machine number for a SPARC64 ELF file. */ |
| |
| static boolean |
| sparc64_elf_object_p (abfd) |
| bfd *abfd; |
| { |
| unsigned long mach = bfd_mach_sparc_v9; |
| |
| if (elf_elfheader (abfd)->e_flags & EF_SPARC_SUN_US1) |
| mach = bfd_mach_sparc_v9a; |
| return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, mach); |
| } |
| |
| #define TARGET_BIG_SYM bfd_elf64_sparc_vec |
| #define TARGET_BIG_NAME "elf64-sparc" |
| #define ELF_ARCH bfd_arch_sparc |
| #define ELF_MAXPAGESIZE 0x100000 |
| |
| /* This is the official ABI value. */ |
| #define ELF_MACHINE_CODE EM_SPARCV9 |
| |
| /* This is the value that we used before the ABI was released. */ |
| #define ELF_MACHINE_ALT1 EM_OLD_SPARCV9 |
| |
| #define elf_info_to_howto \ |
| sparc64_elf_info_to_howto |
| #define bfd_elf64_bfd_reloc_type_lookup \ |
| sparc64_elf_reloc_type_lookup |
| |
| #define elf_backend_create_dynamic_sections \ |
| _bfd_elf_create_dynamic_sections |
| #define elf_backend_check_relocs \ |
| sparc64_elf_check_relocs |
| #define elf_backend_adjust_dynamic_symbol \ |
| sparc64_elf_adjust_dynamic_symbol |
| #define elf_backend_size_dynamic_sections \ |
| sparc64_elf_size_dynamic_sections |
| #define elf_backend_relocate_section \ |
| sparc64_elf_relocate_section |
| #define elf_backend_finish_dynamic_symbol \ |
| sparc64_elf_finish_dynamic_symbol |
| #define elf_backend_finish_dynamic_sections \ |
| sparc64_elf_finish_dynamic_sections |
| |
| #define bfd_elf64_bfd_merge_private_bfd_data \ |
| sparc64_elf_merge_private_bfd_data |
| |
| #define elf_backend_object_p \ |
| sparc64_elf_object_p |
| |
| #define elf_backend_want_got_plt 0 |
| #define elf_backend_plt_readonly 0 |
| #define elf_backend_want_plt_sym 1 |
| |
| /* Section 5.2.4 of the ABI specifies a 256-byte boundary for the table. */ |
| #define elf_backend_plt_alignment 8 |
| |
| #define elf_backend_got_header_size 8 |
| #define elf_backend_plt_header_size PLT_HEADER_SIZE |
| |
| #include "elf64-target.h" |