| /* Lattice Mico32-specific support for 32-bit ELF |
| Copyright (C) 2008-2021 Free Software Foundation, Inc. |
| Contributed by Jon Beniston <jon@beniston.com> |
| |
| 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 3 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., 51 Franklin Street - Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| #include "sysdep.h" |
| #include "bfd.h" |
| #include "libbfd.h" |
| #include "elf-bfd.h" |
| #include "elf/lm32.h" |
| |
| #define DEFAULT_STACK_SIZE 0x20000 |
| |
| #define PLT_ENTRY_SIZE 20 |
| |
| #define PLT0_ENTRY_WORD0 0 |
| #define PLT0_ENTRY_WORD1 0 |
| #define PLT0_ENTRY_WORD2 0 |
| #define PLT0_ENTRY_WORD3 0 |
| #define PLT0_ENTRY_WORD4 0 |
| |
| #define PLT0_PIC_ENTRY_WORD0 0 |
| #define PLT0_PIC_ENTRY_WORD1 0 |
| #define PLT0_PIC_ENTRY_WORD2 0 |
| #define PLT0_PIC_ENTRY_WORD3 0 |
| #define PLT0_PIC_ENTRY_WORD4 0 |
| |
| #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" |
| |
| extern const bfd_target lm32_elf32_fdpic_vec; |
| |
| #define IS_FDPIC(bfd) ((bfd)->xvec == &lm32_elf32_fdpic_vec) |
| |
| static bfd_reloc_status_type lm32_elf_gprel_reloc |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| |
| /* lm32 ELF linker hash table. */ |
| |
| struct elf_lm32_link_hash_table |
| { |
| struct elf_link_hash_table root; |
| |
| /* Short-cuts to get to dynamic linker sections. */ |
| asection *sfixup32; |
| asection *sdynbss; |
| asection *srelbss; |
| |
| int relocs32; |
| }; |
| |
| /* Get the lm32 ELF linker hash table from a link_info structure. */ |
| |
| #define lm32_elf_hash_table(p) \ |
| ((is_elf_hash_table ((p)->hash) \ |
| && elf_hash_table_id (elf_hash_table (p)) == LM32_ELF_DATA) \ |
| ? (struct elf_lm32_link_hash_table *) (p)->hash : NULL) |
| |
| #define lm32fdpic_got_section(info) \ |
| (lm32_elf_hash_table (info)->root.sgot) |
| #define lm32fdpic_gotrel_section(info) \ |
| (lm32_elf_hash_table (info)->root.srelgot) |
| #define lm32fdpic_fixup32_section(info) \ |
| (lm32_elf_hash_table (info)->sfixup32) |
| |
| struct weak_symbol_list |
| { |
| const char *name; |
| struct weak_symbol_list *next; |
| }; |
| |
| /* Create an lm32 ELF linker hash table. */ |
| |
| static struct bfd_link_hash_table * |
| lm32_elf_link_hash_table_create (bfd *abfd) |
| { |
| struct elf_lm32_link_hash_table *ret; |
| size_t amt = sizeof (struct elf_lm32_link_hash_table); |
| |
| ret = bfd_zmalloc (amt); |
| if (ret == NULL) |
| return NULL; |
| |
| if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, |
| _bfd_elf_link_hash_newfunc, |
| sizeof (struct elf_link_hash_entry), |
| LM32_ELF_DATA)) |
| { |
| free (ret); |
| return NULL; |
| } |
| |
| return &ret->root.root; |
| } |
| |
| /* Add a fixup to the ROFIXUP section. */ |
| |
| static bfd_vma |
| _lm32fdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma relocation) |
| { |
| bfd_vma fixup_offset; |
| |
| if (rofixup->flags & SEC_EXCLUDE) |
| return -1; |
| |
| fixup_offset = rofixup->reloc_count * 4; |
| if (rofixup->contents) |
| { |
| BFD_ASSERT (fixup_offset < rofixup->size); |
| if (fixup_offset < rofixup->size) |
| bfd_put_32 (output_bfd, relocation, rofixup->contents + fixup_offset); |
| } |
| rofixup->reloc_count++; |
| |
| return fixup_offset; |
| } |
| |
| /* Create .rofixup sections in DYNOBJ, and set up |
| shortcuts to them in our hash table. */ |
| |
| static bool |
| create_rofixup_section (bfd *dynobj, struct bfd_link_info *info) |
| { |
| struct elf_lm32_link_hash_table *htab; |
| htab = lm32_elf_hash_table (info); |
| |
| if (htab == NULL) |
| return false; |
| |
| /* Fixup section for R_LM32_32 relocs. */ |
| lm32fdpic_fixup32_section (info) |
| = bfd_make_section_anyway_with_flags (dynobj, |
| ".rofixup", |
| (SEC_ALLOC |
| | SEC_LOAD |
| | SEC_HAS_CONTENTS |
| | SEC_IN_MEMORY |
| | SEC_LINKER_CREATED |
| | SEC_READONLY)); |
| if (lm32fdpic_fixup32_section (info) == NULL |
| || !bfd_set_section_alignment (lm32fdpic_fixup32_section (info), 2)) |
| return false; |
| |
| return true; |
| } |
| |
| static reloc_howto_type lm32_elf_howto_table [] = |
| { |
| /* This reloc does nothing. */ |
| HOWTO (R_LM32_NONE, /* type */ |
| 0, /* rightshift */ |
| 3, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_LM32_NONE", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* An 8 bit absolute relocation. */ |
| HOWTO (R_LM32_8, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_LM32_8", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 16 bit absolute relocation. */ |
| HOWTO (R_LM32_16, /* 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_LM32_16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A 32 bit absolute relocation. */ |
| HOWTO (R_LM32_32, /* 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_LM32_32", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_LM32_HI16, /* type */ |
| 16, /* 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_LM32_HI16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_LM32_LO16, /* type */ |
| 0, /* rightshift */ |
| 2, /* 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_LM32_LO16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_LM32_GPREL16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| lm32_elf_gprel_reloc, /* special_function */ |
| "R_LM32_GPREL16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_LM32_CALL, /* type */ |
| 2, /* 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_LM32_CALL", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x3ffffff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| HOWTO (R_LM32_BRANCH, /* type */ |
| 2, /* 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_LM32_BRANCH", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* GNU extension to record C++ vtable hierarchy. */ |
| HOWTO (R_LM32_GNU_VTINHERIT, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| NULL, /* special_function */ |
| "R_LM32_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_LM32_GNU_VTENTRY, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| _bfd_elf_rel_vtable_reloc_fn,/* special_function */ |
| "R_LM32_GNU_VTENTRY", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_LM32_16_GOT, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_LM32_16_GOT", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_LM32_GOTOFF_HI16, /* type */ |
| 16, /* rightshift */ |
| 2, /* 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_LM32_GOTOFF_HI16", /* name */ |
| false, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_LM32_GOTOFF_LO16, /* type */ |
| 0, /* rightshift */ |
| 2, /* 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_LM32_GOTOFF_LO16", /* name */ |
| false, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_LM32_COPY, /* 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_LM32_COPY", /* name */ |
| false, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_LM32_GLOB_DAT, /* 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_LM32_GLOB_DAT", /* name */ |
| false, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_LM32_JMP_SLOT, /* 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_LM32_JMP_SLOT", /* name */ |
| false, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_LM32_RELATIVE, /* 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_LM32_RELATIVE", /* name */ |
| false, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| }; |
| |
| /* Map BFD reloc types to lm32 ELF reloc types. */ |
| |
| struct lm32_reloc_map |
| { |
| bfd_reloc_code_real_type bfd_reloc_val; |
| unsigned char elf_reloc_val; |
| }; |
| |
| static const struct lm32_reloc_map lm32_reloc_map[] = |
| { |
| { BFD_RELOC_NONE, R_LM32_NONE }, |
| { BFD_RELOC_8, R_LM32_8 }, |
| { BFD_RELOC_16, R_LM32_16 }, |
| { BFD_RELOC_32, R_LM32_32 }, |
| { BFD_RELOC_HI16, R_LM32_HI16 }, |
| { BFD_RELOC_LO16, R_LM32_LO16 }, |
| { BFD_RELOC_GPREL16, R_LM32_GPREL16 }, |
| { BFD_RELOC_LM32_CALL, R_LM32_CALL }, |
| { BFD_RELOC_LM32_BRANCH, R_LM32_BRANCH }, |
| { BFD_RELOC_VTABLE_INHERIT, R_LM32_GNU_VTINHERIT }, |
| { BFD_RELOC_VTABLE_ENTRY, R_LM32_GNU_VTENTRY }, |
| { BFD_RELOC_LM32_16_GOT, R_LM32_16_GOT }, |
| { BFD_RELOC_LM32_GOTOFF_HI16, R_LM32_GOTOFF_HI16 }, |
| { BFD_RELOC_LM32_GOTOFF_LO16, R_LM32_GOTOFF_LO16 }, |
| { BFD_RELOC_LM32_COPY, R_LM32_COPY }, |
| { BFD_RELOC_LM32_GLOB_DAT, R_LM32_GLOB_DAT }, |
| { BFD_RELOC_LM32_JMP_SLOT, R_LM32_JMP_SLOT }, |
| { BFD_RELOC_LM32_RELATIVE, R_LM32_RELATIVE }, |
| }; |
| |
| static reloc_howto_type * |
| lm32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| bfd_reloc_code_real_type code) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < sizeof (lm32_reloc_map) / sizeof (lm32_reloc_map[0]); i++) |
| if (lm32_reloc_map[i].bfd_reloc_val == code) |
| return &lm32_elf_howto_table[lm32_reloc_map[i].elf_reloc_val]; |
| return NULL; |
| } |
| |
| static reloc_howto_type * |
| lm32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| const char *r_name) |
| { |
| unsigned int i; |
| |
| for (i = 0; |
| i < sizeof (lm32_elf_howto_table) / sizeof (lm32_elf_howto_table[0]); |
| i++) |
| if (lm32_elf_howto_table[i].name != NULL |
| && strcasecmp (lm32_elf_howto_table[i].name, r_name) == 0) |
| return &lm32_elf_howto_table[i]; |
| |
| return NULL; |
| } |
| |
| |
| /* Set the howto pointer for an Lattice Mico32 ELF reloc. */ |
| |
| static bool |
| lm32_info_to_howto_rela (bfd *abfd, |
| arelent *cache_ptr, |
| Elf_Internal_Rela *dst) |
| { |
| unsigned int r_type; |
| |
| r_type = ELF32_R_TYPE (dst->r_info); |
| if (r_type >= (unsigned int) R_LM32_max) |
| { |
| /* xgettext:c-format */ |
| _bfd_error_handler (_("%pB: unsupported relocation type %#x"), |
| abfd, r_type); |
| bfd_set_error (bfd_error_bad_value); |
| return false; |
| } |
| cache_ptr->howto = &lm32_elf_howto_table[r_type]; |
| return true; |
| } |
| |
| /* Set the right machine number for an Lattice Mico32 ELF file. */ |
| |
| static bool |
| lm32_elf_object_p (bfd *abfd) |
| { |
| return bfd_default_set_arch_mach (abfd, bfd_arch_lm32, bfd_mach_lm32); |
| } |
| |
| /* Set machine type flags just before file is written out. */ |
| |
| static bool |
| lm32_elf_final_write_processing (bfd *abfd) |
| { |
| elf_elfheader (abfd)->e_machine = EM_LATTICEMICO32; |
| elf_elfheader (abfd)->e_flags &=~ EF_LM32_MACH; |
| switch (bfd_get_mach (abfd)) |
| { |
| case bfd_mach_lm32: |
| elf_elfheader (abfd)->e_flags |= E_LM32_MACH; |
| break; |
| default: |
| abort (); |
| } |
| return _bfd_elf_final_write_processing (abfd); |
| } |
| |
| /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a |
| dangerous relocation. */ |
| |
| static bool |
| lm32_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp) |
| { |
| unsigned int count; |
| asymbol **sym; |
| unsigned int i; |
| |
| /* If we've already figured out what GP will be, just return it. */ |
| *pgp = _bfd_get_gp_value (output_bfd); |
| if (*pgp) |
| return true; |
| |
| count = bfd_get_symcount (output_bfd); |
| sym = bfd_get_outsymbols (output_bfd); |
| |
| /* The linker script will have created a symbol named `_gp' with the |
| appropriate value. */ |
| if (sym == NULL) |
| i = count; |
| else |
| { |
| for (i = 0; i < count; i++, sym++) |
| { |
| const char *name; |
| |
| name = bfd_asymbol_name (*sym); |
| if (*name == '_' && strcmp (name, "_gp") == 0) |
| { |
| *pgp = bfd_asymbol_value (*sym); |
| _bfd_set_gp_value (output_bfd, *pgp); |
| break; |
| } |
| } |
| } |
| |
| if (i >= count) |
| { |
| /* Only get the error once. */ |
| *pgp = 4; |
| _bfd_set_gp_value (output_bfd, *pgp); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* We have to figure out the gp value, so that we can adjust the |
| symbol value correctly. We look up the symbol _gp in the output |
| BFD. If we can't find it, we're stuck. We cache it in the ELF |
| target data. We don't need to adjust the symbol value for an |
| external symbol if we are producing relocatable output. */ |
| |
| static bfd_reloc_status_type |
| lm32_elf_final_gp (bfd *output_bfd, asymbol *symbol, bool relocatable, |
| char **error_message, bfd_vma *pgp) |
| { |
| if (bfd_is_und_section (symbol->section) && !relocatable) |
| { |
| *pgp = 0; |
| return bfd_reloc_undefined; |
| } |
| |
| *pgp = _bfd_get_gp_value (output_bfd); |
| if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0)) |
| { |
| if (relocatable) |
| { |
| /* Make up a value. */ |
| *pgp = symbol->section->output_section->vma + 0x4000; |
| _bfd_set_gp_value (output_bfd, *pgp); |
| } |
| else if (!lm32_elf_assign_gp (output_bfd, pgp)) |
| { |
| *error_message = |
| (char *) |
| _("global pointer relative relocation when _gp not defined"); |
| return bfd_reloc_dangerous; |
| } |
| } |
| |
| return bfd_reloc_ok; |
| } |
| |
| static bfd_reloc_status_type |
| lm32_elf_do_gprel_relocate (bfd *abfd, |
| reloc_howto_type *howto, |
| asection *input_section ATTRIBUTE_UNUSED, |
| bfd_byte *data, |
| bfd_vma offset, |
| bfd_vma symbol_value, |
| bfd_vma addend) |
| { |
| return _bfd_final_link_relocate (howto, abfd, input_section, |
| data, offset, symbol_value, addend); |
| } |
| |
| static bfd_reloc_status_type |
| lm32_elf_gprel_reloc (bfd *abfd, |
| arelent *reloc_entry, |
| asymbol *symbol, |
| void *data, |
| asection *input_section, |
| bfd *output_bfd, |
| char **msg) |
| { |
| bfd_vma relocation; |
| bfd_vma gp; |
| bfd_reloc_status_type r; |
| |
| if (output_bfd != (bfd *) NULL |
| && (symbol->flags & BSF_SECTION_SYM) == 0 |
| && (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0)) |
| { |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| if (output_bfd != NULL) |
| return bfd_reloc_ok; |
| |
| relocation = symbol->value |
| + symbol->section->output_section->vma + symbol->section->output_offset; |
| |
| if ((r = |
| lm32_elf_final_gp (abfd, symbol, false, msg, &gp)) == bfd_reloc_ok) |
| { |
| relocation = relocation + reloc_entry->addend - gp; |
| reloc_entry->addend = 0; |
| if ((signed) relocation < -32768 || (signed) relocation > 32767) |
| { |
| *msg = _("global pointer relative address out of range"); |
| r = bfd_reloc_outofrange; |
| } |
| else |
| { |
| r = lm32_elf_do_gprel_relocate (abfd, reloc_entry->howto, |
| input_section, |
| data, reloc_entry->address, |
| relocation, reloc_entry->addend); |
| } |
| } |
| |
| return r; |
| } |
| |
| /* Find the segment number in which OSEC, and output section, is |
| located. */ |
| |
| static unsigned |
| _lm32fdpic_osec_to_segment (bfd *output_bfd, asection *osec) |
| { |
| struct elf_segment_map *m; |
| Elf_Internal_Phdr *p; |
| |
| /* Find the segment that contains the output_section. */ |
| for (m = elf_seg_map (output_bfd), p = elf_tdata (output_bfd)->phdr; |
| m != NULL; |
| m = m->next, p++) |
| { |
| int i; |
| |
| for (i = m->count - 1; i >= 0; i--) |
| if (m->sections[i] == osec) |
| break; |
| |
| if (i >= 0) |
| break; |
| } |
| |
| return p - elf_tdata (output_bfd)->phdr; |
| } |
| |
| /* Determine if an output section is read-only. */ |
| |
| inline static bool |
| _lm32fdpic_osec_readonly_p (bfd *output_bfd, asection *osec) |
| { |
| unsigned seg = _lm32fdpic_osec_to_segment (output_bfd, osec); |
| |
| return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W); |
| } |
| |
| /* Relocate a section */ |
| |
| static int |
| lm32_elf_relocate_section (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) |
| { |
| Elf_Internal_Shdr *symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); |
| Elf_Internal_Rela *rel, *relend; |
| struct elf_lm32_link_hash_table *htab = lm32_elf_hash_table (info); |
| bfd_vma *local_got_offsets; |
| asection *sgot; |
| |
| if (htab == NULL) |
| return false; |
| |
| local_got_offsets = elf_local_got_offsets (input_bfd); |
| |
| sgot = htab->root.sgot; |
| |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (input_bfd); |
| |
| rel = relocs; |
| relend = relocs + input_section->reloc_count; |
| for (; rel < relend; rel++) |
| { |
| reloc_howto_type *howto; |
| unsigned int r_type; |
| unsigned long r_symndx; |
| Elf_Internal_Sym *sym; |
| asection *sec; |
| struct elf_link_hash_entry *h; |
| bfd_vma relocation; |
| bfd_vma gp; |
| bfd_reloc_status_type r; |
| const char *name = NULL; |
| |
| r_symndx = ELF32_R_SYM (rel->r_info); |
| r_type = ELF32_R_TYPE (rel->r_info); |
| |
| if (r_type == R_LM32_GNU_VTENTRY |
| || r_type == R_LM32_GNU_VTINHERIT ) |
| continue; |
| |
| h = NULL; |
| sym = NULL; |
| sec = NULL; |
| |
| howto = lm32_elf_howto_table + r_type; |
| |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| /* It's a local symbol. */ |
| sym = local_syms + r_symndx; |
| sec = local_sections[r_symndx]; |
| relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| name = bfd_elf_string_from_elf_section |
| (input_bfd, symtab_hdr->sh_link, sym->st_name); |
| name = name == NULL ? bfd_section_name (sec) : name; |
| } |
| else |
| { |
| /* It's a global symbol. */ |
| bool unresolved_reloc; |
| bool warned, ignored; |
| |
| RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
| r_symndx, symtab_hdr, sym_hashes, |
| h, sec, relocation, |
| unresolved_reloc, warned, ignored); |
| name = h->root.root.string; |
| } |
| |
| if (sec != NULL && discarded_section (sec)) |
| RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
| rel, 1, relend, howto, 0, contents); |
| |
| if (bfd_link_relocatable (info)) |
| { |
| /* This is a relocatable 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 (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
| continue; |
| |
| /* If partial_inplace, we need to store any additional addend |
| back in the section. */ |
| if (! howto->partial_inplace) |
| continue; |
| |
| /* Shouldn't reach here. */ |
| abort (); |
| r = bfd_reloc_ok; |
| } |
| else |
| { |
| switch (howto->type) |
| { |
| case R_LM32_GPREL16: |
| if (!lm32_elf_assign_gp (output_bfd, &gp)) |
| r = bfd_reloc_dangerous; |
| else |
| { |
| relocation = relocation + rel->r_addend - gp; |
| rel->r_addend = 0; |
| if ((signed)relocation < -32768 || (signed)relocation > 32767) |
| r = bfd_reloc_outofrange; |
| else |
| { |
| r = _bfd_final_link_relocate (howto, input_bfd, |
| input_section, contents, |
| rel->r_offset, relocation, |
| rel->r_addend); |
| } |
| } |
| break; |
| case R_LM32_16_GOT: |
| /* Relocation is to the entry for this symbol in the global |
| offset table. */ |
| BFD_ASSERT (sgot != NULL); |
| if (h != NULL) |
| { |
| bool dyn; |
| bfd_vma off; |
| |
| off = h->got.offset; |
| BFD_ASSERT (off != (bfd_vma) -1); |
| |
| dyn = htab->root.dynamic_sections_created; |
| if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
| bfd_link_pic (info), |
| h) |
| || (bfd_link_pic (info) |
| && (info->symbolic |
| || h->dynindx == -1 |
| || h->forced_local) |
| && h->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 4, 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 |
| { |
| /* Write entry in GOT */ |
| bfd_put_32 (output_bfd, relocation, |
| sgot->contents + off); |
| /* Create entry in .rofixup pointing to GOT entry. */ |
| if (IS_FDPIC (output_bfd) && h->root.type != bfd_link_hash_undefweak) |
| { |
| _lm32fdpic_add_rofixup (output_bfd, |
| lm32fdpic_fixup32_section |
| (info), |
| sgot->output_section->vma |
| + sgot->output_offset |
| + off); |
| } |
| /* Mark GOT entry as having been written. */ |
| h->got.offset |= 1; |
| } |
| } |
| |
| relocation = sgot->output_offset + off; |
| } |
| else |
| { |
| bfd_vma off; |
| bfd_byte *loc; |
| |
| BFD_ASSERT (local_got_offsets != NULL |
| && local_got_offsets[r_symndx] != (bfd_vma) -1); |
| |
| /* Get offset into GOT table. */ |
| off = local_got_offsets[r_symndx]; |
| |
| /* The offset must always be a multiple of 4. We use |
| the least significant bit to record whether we have |
| already processed this entry. */ |
| if ((off & 1) != 0) |
| off &= ~1; |
| else |
| { |
| /* Write entry in GOT. */ |
| bfd_put_32 (output_bfd, relocation, sgot->contents + off); |
| /* Create entry in .rofixup pointing to GOT entry. */ |
| if (IS_FDPIC (output_bfd)) |
| { |
| _lm32fdpic_add_rofixup (output_bfd, |
| lm32fdpic_fixup32_section |
| (info), |
| sgot->output_section->vma |
| + sgot->output_offset |
| + off); |
| } |
| |
| if (bfd_link_pic (info)) |
| { |
| asection *srelgot; |
| Elf_Internal_Rela outrel; |
| |
| /* We need to generate a R_LM32_RELATIVE reloc |
| for the dynamic linker. */ |
| srelgot = htab->root.srelgot; |
| BFD_ASSERT (srelgot != NULL); |
| |
| outrel.r_offset = (sgot->output_section->vma |
| + sgot->output_offset |
| + off); |
| outrel.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); |
| outrel.r_addend = relocation; |
| loc = srelgot->contents; |
| loc += srelgot->reloc_count * sizeof (Elf32_External_Rela); |
| bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc); |
| ++srelgot->reloc_count; |
| } |
| |
| local_got_offsets[r_symndx] |= 1; |
| } |
| |
| |
| relocation = sgot->output_offset + off; |
| } |
| |
| /* Addend should be zero. */ |
| if (rel->r_addend != 0) |
| _bfd_error_handler |
| (_("internal error: addend should be zero for %s"), |
| "R_LM32_16_GOT"); |
| |
| r = _bfd_final_link_relocate (howto, |
| input_bfd, |
| input_section, |
| contents, |
| rel->r_offset, |
| relocation, |
| rel->r_addend); |
| break; |
| |
| case R_LM32_GOTOFF_LO16: |
| case R_LM32_GOTOFF_HI16: |
| /* Relocation is offset from GOT. */ |
| BFD_ASSERT (sgot != NULL); |
| relocation -= sgot->output_section->vma; |
| /* Account for sign-extension. */ |
| if ((r_type == R_LM32_GOTOFF_HI16) |
| && ((relocation + rel->r_addend) & 0x8000)) |
| rel->r_addend += 0x10000; |
| r = _bfd_final_link_relocate (howto, |
| input_bfd, |
| input_section, |
| contents, |
| rel->r_offset, |
| relocation, |
| rel->r_addend); |
| break; |
| |
| case R_LM32_32: |
| if (IS_FDPIC (output_bfd)) |
| { |
| if ((!h) || (h && h->root.type != bfd_link_hash_undefweak)) |
| { |
| /* Only create .rofixup entries for relocs in loadable sections. */ |
| if ((bfd_section_flags (input_section->output_section) |
| & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)) |
| |
| { |
| /* Check address to be modified is writable. */ |
| if (_lm32fdpic_osec_readonly_p (output_bfd, |
| input_section |
| ->output_section)) |
| { |
| info->callbacks->warning |
| (info, |
| _("cannot emit dynamic relocations in read-only section"), |
| name, input_bfd, input_section, rel->r_offset); |
| return false; |
| } |
| /* Create entry in .rofixup section. */ |
| _lm32fdpic_add_rofixup (output_bfd, |
| lm32fdpic_fixup32_section (info), |
| input_section->output_section->vma |
| + input_section->output_offset |
| + rel->r_offset); |
| } |
| } |
| } |
| /* Fall through. */ |
| |
| default: |
| r = _bfd_final_link_relocate (howto, |
| input_bfd, |
| input_section, |
| contents, |
| rel->r_offset, |
| relocation, |
| rel->r_addend); |
| break; |
| } |
| } |
| |
| if (r != bfd_reloc_ok) |
| { |
| const char *msg = NULL; |
| arelent bfd_reloc; |
| |
| if (! lm32_info_to_howto_rela (input_bfd, &bfd_reloc, rel)) |
| continue; |
| howto = bfd_reloc.howto; |
| |
| if (h != NULL) |
| 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 || *name == '\0') |
| name = bfd_section_name (sec); |
| } |
| |
| switch (r) |
| { |
| case bfd_reloc_overflow: |
| if ((h != NULL) |
| && (h->root.type == bfd_link_hash_undefweak)) |
| break; |
| (*info->callbacks->reloc_overflow) |
| (info, (h ? &h->root : NULL), name, howto->name, |
| (bfd_vma) 0, input_bfd, input_section, rel->r_offset); |
| break; |
| |
| case bfd_reloc_undefined: |
| (*info->callbacks->undefined_symbol) |
| (info, name, input_bfd, input_section, rel->r_offset, true); |
| break; |
| |
| case bfd_reloc_outofrange: |
| msg = _("internal error: out of range error"); |
| goto common_error; |
| |
| case bfd_reloc_notsupported: |
| msg = _("internal error: unsupported relocation error"); |
| goto common_error; |
| |
| case bfd_reloc_dangerous: |
| msg = _("internal error: dangerous error"); |
| goto common_error; |
| |
| default: |
| msg = _("internal error: unknown error"); |
| /* fall through */ |
| |
| common_error: |
| (*info->callbacks->warning) (info, msg, name, input_bfd, |
| input_section, rel->r_offset); |
| break; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| static asection * |
| lm32_elf_gc_mark_hook (asection *sec, |
| struct bfd_link_info *info, |
| Elf_Internal_Rela *rel, |
| struct elf_link_hash_entry *h, |
| Elf_Internal_Sym *sym) |
| { |
| if (h != NULL) |
| switch (ELF32_R_TYPE (rel->r_info)) |
| { |
| case R_LM32_GNU_VTINHERIT: |
| case R_LM32_GNU_VTENTRY: |
| return NULL; |
| } |
| |
| return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
| } |
| |
| /* Look through the relocs for a section during the first phase. */ |
| |
| static bool |
| lm32_elf_check_relocs (bfd *abfd, |
| struct bfd_link_info *info, |
| asection *sec, |
| const Elf_Internal_Rela *relocs) |
| { |
| 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; |
| struct elf_lm32_link_hash_table *htab; |
| bfd *dynobj; |
| |
| if (bfd_link_relocatable (info)) |
| return true; |
| |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (abfd); |
| sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); |
| if (!elf_bad_symtab (abfd)) |
| sym_hashes_end -= symtab_hdr->sh_info; |
| |
| htab = lm32_elf_hash_table (info); |
| if (htab == NULL) |
| return false; |
| |
| dynobj = htab->root.dynobj; |
| |
| rel_end = relocs + sec->reloc_count; |
| for (rel = relocs; rel < rel_end; rel++) |
| { |
| int r_type; |
| struct elf_link_hash_entry *h; |
| unsigned long r_symndx; |
| |
| r_symndx = ELF32_R_SYM (rel->r_info); |
| r_type = ELF32_R_TYPE (rel->r_info); |
| if (r_symndx < symtab_hdr->sh_info) |
| h = NULL; |
| 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; |
| } |
| |
| /* Some relocs require a global offset table. */ |
| if (htab->root.sgot == NULL) |
| { |
| switch (r_type) |
| { |
| case R_LM32_16_GOT: |
| case R_LM32_GOTOFF_HI16: |
| case R_LM32_GOTOFF_LO16: |
| if (dynobj == NULL) |
| htab->root.dynobj = dynobj = abfd; |
| if (!_bfd_elf_create_got_section (dynobj, info)) |
| return false; |
| break; |
| } |
| } |
| |
| /* Some relocs require a rofixup table. */ |
| if (IS_FDPIC (abfd)) |
| { |
| switch (r_type) |
| { |
| case R_LM32_32: |
| /* FDPIC requires a GOT if there is a .rofixup section |
| (Normal ELF doesn't). */ |
| if (dynobj == NULL) |
| htab->root.dynobj = dynobj = abfd; |
| if (!_bfd_elf_create_got_section (dynobj, info)) |
| return false; |
| /* Create .rofixup section */ |
| if (htab->sfixup32 == NULL) |
| { |
| if (! create_rofixup_section (dynobj, info)) |
| return false; |
| } |
| break; |
| case R_LM32_16_GOT: |
| case R_LM32_GOTOFF_HI16: |
| case R_LM32_GOTOFF_LO16: |
| /* Create .rofixup section. */ |
| if (htab->sfixup32 == NULL) |
| { |
| if (dynobj == NULL) |
| htab->root.dynobj = dynobj = abfd; |
| if (! create_rofixup_section (dynobj, info)) |
| return false; |
| } |
| break; |
| } |
| } |
| |
| switch (r_type) |
| { |
| case R_LM32_16_GOT: |
| if (h != NULL) |
| h->got.refcount += 1; |
| else |
| { |
| bfd_signed_vma *local_got_refcounts; |
| |
| /* This is a global offset table entry for a local symbol. */ |
| local_got_refcounts = elf_local_got_refcounts (abfd); |
| if (local_got_refcounts == NULL) |
| { |
| bfd_size_type size; |
| |
| size = symtab_hdr->sh_info; |
| size *= sizeof (bfd_signed_vma); |
| local_got_refcounts = bfd_zalloc (abfd, size); |
| if (local_got_refcounts == NULL) |
| return false; |
| elf_local_got_refcounts (abfd) = local_got_refcounts; |
| } |
| local_got_refcounts[r_symndx] += 1; |
| } |
| break; |
| |
| /* This relocation describes the C++ object vtable hierarchy. |
| Reconstruct it for later use during GC. */ |
| case R_LM32_GNU_VTINHERIT: |
| if (!bfd_elf_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_LM32_GNU_VTENTRY: |
| if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
| return false; |
| break; |
| |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Finish up the dynamic sections. */ |
| |
| static bool |
| lm32_elf_finish_dynamic_sections (bfd *output_bfd, |
| struct bfd_link_info *info) |
| { |
| struct elf_lm32_link_hash_table *htab; |
| bfd *dynobj; |
| asection *sdyn; |
| asection *sgot; |
| |
| htab = lm32_elf_hash_table (info); |
| if (htab == NULL) |
| return false; |
| |
| dynobj = htab->root.dynobj; |
| |
| sgot = htab->root.sgotplt; |
| sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
| |
| if (htab->root.dynamic_sections_created) |
| { |
| asection *splt; |
| Elf32_External_Dyn *dyncon, *dynconend; |
| |
| BFD_ASSERT (sgot != NULL && sdyn != NULL); |
| |
| dyncon = (Elf32_External_Dyn *) sdyn->contents; |
| dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
| |
| for (; dyncon < dynconend; dyncon++) |
| { |
| Elf_Internal_Dyn dyn; |
| asection *s; |
| |
| bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); |
| |
| switch (dyn.d_tag) |
| { |
| default: |
| break; |
| |
| case DT_PLTGOT: |
| s = htab->root.sgotplt; |
| goto get_vma; |
| case DT_JMPREL: |
| s = htab->root.srelplt; |
| get_vma: |
| dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
| bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| break; |
| |
| case DT_PLTRELSZ: |
| s = htab->root.srelplt; |
| dyn.d_un.d_val = s->size; |
| bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
| break; |
| } |
| } |
| |
| /* Fill in the first entry in the procedure linkage table. */ |
| splt = htab->root.splt; |
| if (splt && splt->size > 0) |
| { |
| if (bfd_link_pic (info)) |
| { |
| bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents); |
| bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4); |
| bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8); |
| bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12); |
| bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16); |
| } |
| else |
| { |
| unsigned long addr; |
| /* addr = .got + 4 */ |
| addr = sgot->output_section->vma + sgot->output_offset + 4; |
| bfd_put_32 (output_bfd, |
| PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff), |
| splt->contents); |
| bfd_put_32 (output_bfd, |
| PLT0_ENTRY_WORD1 | (addr & 0xffff), |
| splt->contents + 4); |
| bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8); |
| bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12); |
| bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16); |
| } |
| |
| elf_section_data (splt->output_section)->this_hdr.sh_entsize = |
| PLT_ENTRY_SIZE; |
| } |
| } |
| |
| /* Fill in the first three entries in the global offset table. */ |
| if (sgot && sgot->size > 0) |
| { |
| if (sdyn == NULL) |
| bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); |
| else |
| bfd_put_32 (output_bfd, |
| sdyn->output_section->vma + sdyn->output_offset, |
| sgot->contents); |
| bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); |
| bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); |
| |
| /* FIXME: This can be null if create_dynamic_sections wasn't called. */ |
| if (elf_section_data (sgot->output_section) != NULL) |
| elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; |
| } |
| |
| if (lm32fdpic_fixup32_section (info)) |
| { |
| struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot; |
| bfd_vma got_value = hgot->root.u.def.value |
| + hgot->root.u.def.section->output_section->vma |
| + hgot->root.u.def.section->output_offset; |
| struct bfd_link_hash_entry *hend; |
| |
| /* Last entry is pointer to GOT. */ |
| _lm32fdpic_add_rofixup (output_bfd, lm32fdpic_fixup32_section (info), got_value); |
| |
| /* Check we wrote enough entries. */ |
| if (lm32fdpic_fixup32_section (info)->size |
| != (lm32fdpic_fixup32_section (info)->reloc_count * 4)) |
| { |
| _bfd_error_handler |
| ("LINKER BUG: .rofixup section size mismatch: size/4 %" PRId64 |
| " != relocs %d", |
| (int64_t) (lm32fdpic_fixup32_section (info)->size / 4), |
| lm32fdpic_fixup32_section (info)->reloc_count); |
| return false; |
| } |
| |
| hend = bfd_link_hash_lookup (info->hash, "__ROFIXUP_END__", |
| false, false, true); |
| if (hend |
| && (hend->type == bfd_link_hash_defined |
| || hend->type == bfd_link_hash_defweak) |
| && hend->u.def.section->output_section != NULL) |
| { |
| bfd_vma value = |
| lm32fdpic_fixup32_section (info)->output_section->vma |
| + lm32fdpic_fixup32_section (info)->output_offset |
| + lm32fdpic_fixup32_section (info)->size |
| - hend->u.def.section->output_section->vma |
| - hend->u.def.section->output_offset; |
| BFD_ASSERT (hend->u.def.value == value); |
| if (hend->u.def.value != value) |
| { |
| _bfd_error_handler |
| ("LINKER BUG: .rofixup section hend->u.def.value != value: %" |
| PRId64 " != %" PRId64, |
| (int64_t) hend->u.def.value, (int64_t) value); |
| return false; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Finish up dynamic symbol handling. We set the contents of various |
| dynamic sections here. */ |
| |
| static bool |
| lm32_elf_finish_dynamic_symbol (bfd *output_bfd, |
| struct bfd_link_info *info, |
| struct elf_link_hash_entry *h, |
| Elf_Internal_Sym *sym) |
| { |
| struct elf_lm32_link_hash_table *htab; |
| bfd_byte *loc; |
| |
| htab = lm32_elf_hash_table (info); |
| if (htab == NULL) |
| return false; |
| |
| if (h->plt.offset != (bfd_vma) -1) |
| { |
| asection *splt; |
| asection *sgot; |
| asection *srela; |
| |
| bfd_vma plt_index; |
| bfd_vma got_offset; |
| Elf_Internal_Rela rela; |
| |
| /* This symbol has an entry in the procedure linkage table. Set |
| it up. */ |
| BFD_ASSERT (h->dynindx != -1); |
| |
| splt = htab->root.splt; |
| sgot = htab->root.sgotplt; |
| srela = htab->root.srelplt; |
| BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL); |
| |
| /* Get the index in the procedure linkage table which |
| corresponds to this symbol. This is the index of this symbol |
| in all the symbols for which we are making plt entries. The |
| first entry in the procedure linkage table is reserved. */ |
| plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; |
| |
| /* Get the offset into the .got table of the entry that |
| corresponds to this function. Each .got entry is 4 bytes. |
| The first three are reserved. */ |
| got_offset = (plt_index + 3) * 4; |
| |
| /* Fill in the entry in the procedure linkage table. */ |
| if (! bfd_link_pic (info)) |
| { |
| /* TODO */ |
| } |
| else |
| { |
| /* TODO */ |
| } |
| |
| /* Fill in the entry in the global offset table. */ |
| bfd_put_32 (output_bfd, |
| (splt->output_section->vma |
| + splt->output_offset |
| + h->plt.offset |
| + 12), /* same offset */ |
| sgot->contents + got_offset); |
| |
| /* Fill in the entry in the .rela.plt section. */ |
| rela.r_offset = (sgot->output_section->vma |
| + sgot->output_offset |
| + got_offset); |
| rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_JMP_SLOT); |
| rela.r_addend = 0; |
| loc = srela->contents; |
| loc += plt_index * sizeof (Elf32_External_Rela); |
| bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| |
| if (!h->def_regular) |
| { |
| /* 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 global offset table. Set it |
| up. */ |
| sgot = htab->root.sgot; |
| srela = htab->root.srelgot; |
| 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 (bfd_link_pic (info) |
| && (info->symbolic |
| || h->dynindx == -1 |
| || h->forced_local) |
| && h->def_regular) |
| { |
| rela.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE); |
| rela.r_addend = (h->root.u.def.value |
| + h->root.u.def.section->output_section->vma |
| + h->root.u.def.section->output_offset); |
| } |
| else |
| { |
| BFD_ASSERT ((h->got.offset & 1) == 0); |
| bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
| rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_GLOB_DAT); |
| rela.r_addend = 0; |
| } |
| |
| loc = srela->contents; |
| loc += srela->reloc_count * sizeof (Elf32_External_Rela); |
| bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| ++srela->reloc_count; |
| } |
| |
| if (h->needs_copy) |
| { |
| asection *s; |
| Elf_Internal_Rela rela; |
| |
| /* This symbols needs a copy reloc. Set it up. */ |
| BFD_ASSERT (h->dynindx != -1 |
| && (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak)); |
| |
| s = bfd_get_linker_section (htab->root.dynobj, ".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 = ELF32_R_INFO (h->dynindx, R_LM32_COPY); |
| rela.r_addend = 0; |
| loc = s->contents; |
| loc += s->reloc_count * sizeof (Elf32_External_Rela); |
| bfd_elf32_swap_reloca_out (output_bfd, &rela, loc); |
| ++s->reloc_count; |
| } |
| |
| /* Mark some specially defined symbols as absolute. */ |
| if (h == htab->root.hdynamic || h == htab->root.hgot) |
| sym->st_shndx = SHN_ABS; |
| |
| return true; |
| } |
| |
| static enum elf_reloc_type_class |
| lm32_elf_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| const asection *rel_sec ATTRIBUTE_UNUSED, |
| const Elf_Internal_Rela *rela) |
| { |
| switch ((int) ELF32_R_TYPE (rela->r_info)) |
| { |
| case R_LM32_RELATIVE: return reloc_class_relative; |
| case R_LM32_JMP_SLOT: return reloc_class_plt; |
| case R_LM32_COPY: return reloc_class_copy; |
| default: return reloc_class_normal; |
| } |
| } |
| |
| /* 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 bool |
| lm32_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
| struct elf_link_hash_entry *h) |
| { |
| struct elf_lm32_link_hash_table *htab; |
| bfd *dynobj; |
| asection *s; |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| |
| /* Make sure we know what is going on here. */ |
| BFD_ASSERT (dynobj != NULL |
| && (h->needs_plt |
| || h->is_weakalias |
| || (h->def_dynamic |
| && h->ref_regular |
| && !h->def_regular))); |
| |
| /* If this is a function, put it in the procedure linkage table. We |
| will fill in the contents of the procedure linkage table later, |
| when we know the address of the .got section. */ |
| if (h->type == STT_FUNC |
| || h->needs_plt) |
| { |
| if (! bfd_link_pic (info) |
| && !h->def_dynamic |
| && !h->ref_dynamic |
| && h->root.type != bfd_link_hash_undefweak |
| && h->root.type != bfd_link_hash_undefined) |
| { |
| /* This case can occur if we saw a PLT reloc in an input |
| file, but the symbol was never referred to by a dynamic |
| object. In such a case, we don't actually need to build |
| a procedure linkage table, and we can just do a PCREL |
| reloc instead. */ |
| h->plt.offset = (bfd_vma) -1; |
| h->needs_plt = 0; |
| } |
| |
| return true; |
| } |
| else |
| h->plt.offset = (bfd_vma) -1; |
| |
| /* 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->is_weakalias) |
| { |
| struct elf_link_hash_entry *def = weakdef (h); |
| BFD_ASSERT (def->root.type == bfd_link_hash_defined); |
| h->root.u.def.section = def->root.u.def.section; |
| h->root.u.def.value = def->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 (bfd_link_pic (info)) |
| 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->non_got_ref) |
| return true; |
| |
| /* If -z nocopyreloc was given, we won't generate them either. */ |
| if (0 && info->nocopyreloc) |
| { |
| h->non_got_ref = 0; |
| return true; |
| } |
| |
| /* If we don't find any dynamic relocs in read-only sections, then |
| we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
| if (0 && !_bfd_elf_readonly_dynrelocs (h)) |
| { |
| h->non_got_ref = 0; |
| 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. */ |
| |
| htab = lm32_elf_hash_table (info); |
| if (htab == NULL) |
| return false; |
| |
| s = htab->sdynbss; |
| BFD_ASSERT (s != NULL); |
| |
| /* We must generate a R_LM32_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 && h->size != 0) |
| { |
| asection *srel; |
| |
| srel = htab->srelbss; |
| BFD_ASSERT (srel != NULL); |
| srel->size += sizeof (Elf32_External_Rela); |
| h->needs_copy = 1; |
| } |
| |
| return _bfd_elf_adjust_dynamic_copy (info, h, s); |
| } |
| |
| /* Allocate space in .plt, .got and associated reloc sections for |
| dynamic relocs. */ |
| |
| static bool |
| allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
| { |
| struct bfd_link_info *info; |
| struct elf_lm32_link_hash_table *htab; |
| struct elf_dyn_relocs *p; |
| |
| if (h->root.type == bfd_link_hash_indirect) |
| return true; |
| |
| info = (struct bfd_link_info *) inf; |
| htab = lm32_elf_hash_table (info); |
| if (htab == NULL) |
| return false; |
| |
| if (htab->root.dynamic_sections_created |
| && h->plt.refcount > 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->forced_local) |
| { |
| if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| return false; |
| } |
| |
| if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) |
| { |
| asection *s = htab->root.splt; |
| |
| /* If this is the first .plt entry, make room for the special |
| first entry. */ |
| if (s->size == 0) |
| s->size += PLT_ENTRY_SIZE; |
| |
| h->plt.offset = s->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 (! bfd_link_pic (info) |
| && !h->def_regular) |
| { |
| h->root.u.def.section = s; |
| h->root.u.def.value = h->plt.offset; |
| } |
| |
| /* Make room for this entry. */ |
| s->size += PLT_ENTRY_SIZE; |
| |
| /* We also need to make an entry in the .got.plt section, which |
| will be placed in the .got section by the linker script. */ |
| htab->root.sgotplt->size += 4; |
| |
| /* We also need to make an entry in the .rel.plt section. */ |
| htab->root.srelplt->size += sizeof (Elf32_External_Rela); |
| } |
| else |
| { |
| h->plt.offset = (bfd_vma) -1; |
| h->needs_plt = 0; |
| } |
| } |
| else |
| { |
| h->plt.offset = (bfd_vma) -1; |
| h->needs_plt = 0; |
| } |
| |
| if (h->got.refcount > 0) |
| { |
| asection *s; |
| bool dyn; |
| |
| /* 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->forced_local) |
| { |
| if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| return false; |
| } |
| |
| s = htab->root.sgot; |
| |
| h->got.offset = s->size; |
| s->size += 4; |
| dyn = htab->root.dynamic_sections_created; |
| if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)) |
| htab->root.srelgot->size += sizeof (Elf32_External_Rela); |
| } |
| else |
| h->got.offset = (bfd_vma) -1; |
| |
| if (h->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 pc-relative relocs that have become local due to symbol |
| visibility changes. */ |
| |
| if (bfd_link_pic (info)) |
| { |
| if (h->def_regular |
| && (h->forced_local |
| || info->symbolic)) |
| { |
| struct elf_dyn_relocs **pp; |
| |
| for (pp = &h->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 (h->dyn_relocs != NULL |
| && h->root.type == bfd_link_hash_undefweak) |
| { |
| if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) |
| h->dyn_relocs = NULL; |
| |
| /* Make sure undefined weak symbols are output as a dynamic |
| symbol in PIEs. */ |
| else if (h->dynindx == -1 |
| && !h->forced_local) |
| { |
| if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
| return false; |
| } |
| } |
| } |
| else |
| { |
| /* For the non-shared case, discard space for relocs against |
| symbols which turn out to need copy relocs or are not |
| dynamic. */ |
| |
| if (!h->non_got_ref |
| && ((h->def_dynamic |
| && !h->def_regular) |
| || (htab->root.dynamic_sections_created |
| && (h->root.type == bfd_link_hash_undefweak |
| || h->root.type == bfd_link_hash_undefined)))) |
| { |
| /* 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->forced_local) |
| { |
| if (! bfd_elf_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; |
| } |
| |
| h->dyn_relocs = NULL; |
| |
| keep: ; |
| } |
| |
| /* Finally, allocate space. */ |
| for (p = h->dyn_relocs; p != NULL; p = p->next) |
| { |
| asection *sreloc = elf_section_data (p->sec)->sreloc; |
| sreloc->size += p->count * sizeof (Elf32_External_Rela); |
| } |
| |
| return true; |
| } |
| |
| /* Set the sizes of the dynamic sections. */ |
| |
| static bool |
| lm32_elf_size_dynamic_sections (bfd *output_bfd, |
| struct bfd_link_info *info) |
| { |
| struct elf_lm32_link_hash_table *htab; |
| bfd *dynobj; |
| asection *s; |
| bool relocs; |
| bfd *ibfd; |
| |
| htab = lm32_elf_hash_table (info); |
| if (htab == NULL) |
| return false; |
| |
| dynobj = htab->root.dynobj; |
| BFD_ASSERT (dynobj != NULL); |
| |
| if (htab->root.dynamic_sections_created) |
| { |
| /* Set the contents of the .interp section to the interpreter. */ |
| if (bfd_link_executable (info) && !info->nointerp) |
| { |
| s = bfd_get_linker_section (dynobj, ".interp"); |
| BFD_ASSERT (s != NULL); |
| s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
| s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
| } |
| } |
| |
| /* Set up .got offsets for local syms, and space for local dynamic |
| relocs. */ |
| for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| { |
| bfd_signed_vma *local_got; |
| bfd_signed_vma *end_local_got; |
| 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 elf_dyn_relocs *p; |
| |
| for (p = ((struct elf_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->size += p->count * sizeof (Elf32_External_Rela); |
| if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
| info->flags |= DF_TEXTREL; |
| } |
| } |
| } |
| |
| local_got = elf_local_got_refcounts (ibfd); |
| if (!local_got) |
| continue; |
| |
| symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| locsymcount = symtab_hdr->sh_info; |
| end_local_got = local_got + locsymcount; |
| s = htab->root.sgot; |
| srel = htab->root.srelgot; |
| for (; local_got < end_local_got; ++local_got) |
| { |
| if (*local_got > 0) |
| { |
| *local_got = s->size; |
| s->size += 4; |
| if (bfd_link_pic (info)) |
| srel->size += sizeof (Elf32_External_Rela); |
| } |
| else |
| *local_got = (bfd_vma) -1; |
| } |
| } |
| |
| /* Allocate global sym .plt and .got entries, and space for global |
| sym dynamic relocs. */ |
| elf_link_hash_traverse (&htab->root, allocate_dynrelocs, 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; |
| |
| if (s == htab->root.splt |
| || s == htab->root.sgot |
| || s == htab->root.sgotplt |
| || s == htab->sdynbss) |
| { |
| /* Strip this section if we don't need it; see the |
| comment below. */ |
| } |
| else if (startswith (bfd_section_name (s), ".rela")) |
| { |
| if (s->size != 0 && s != htab->root.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->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. */ |
| s->flags |= SEC_EXCLUDE; |
| continue; |
| } |
| |
| if ((s->flags & SEC_HAS_CONTENTS) == 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_LM32_NONE reloc instead |
| of garbage. */ |
| s->contents = bfd_zalloc (dynobj, s->size); |
| if (s->contents == NULL) |
| return false; |
| } |
| |
| if (!_bfd_elf_add_dynamic_tags (output_bfd, info, relocs)) |
| return false; |
| |
| /* Allocate .rofixup section. */ |
| if (IS_FDPIC (output_bfd)) |
| { |
| struct weak_symbol_list *list_start = NULL, *list_end = NULL; |
| int rgot_weak_count = 0; |
| int r32_count = 0; |
| int rgot_count = 0; |
| /* Look for deleted sections. */ |
| for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
| { |
| for (s = ibfd->sections; s != NULL; s = s->next) |
| { |
| if (s->reloc_count) |
| { |
| /* Count relocs that need .rofixup entires. */ |
| Elf_Internal_Rela *internal_relocs, *end; |
| internal_relocs = elf_section_data (s)->relocs; |
| if (internal_relocs == NULL) |
| internal_relocs = (_bfd_elf_link_read_relocs (ibfd, s, NULL, NULL, false)); |
| if (internal_relocs != NULL) |
| { |
| end = internal_relocs + s->reloc_count; |
| while (internal_relocs < end) |
| { |
| Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd); |
| unsigned long r_symndx; |
| struct elf_link_hash_entry *h; |
| |
| symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (ibfd); |
| r_symndx = ELF32_R_SYM (internal_relocs->r_info); |
| h = NULL; |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| } |
| 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; |
| } |
| |
| /* Don't generate entries for weak symbols. */ |
| if (!h || (h && h->root.type != bfd_link_hash_undefweak)) |
| { |
| if (!discarded_section (s) && !((bfd_section_flags (s) & SEC_ALLOC) == 0)) |
| { |
| switch (ELF32_R_TYPE (internal_relocs->r_info)) |
| { |
| case R_LM32_32: |
| r32_count++; |
| break; |
| case R_LM32_16_GOT: |
| rgot_count++; |
| break; |
| } |
| } |
| } |
| else |
| { |
| struct weak_symbol_list *current, *new_entry; |
| /* Is this symbol already in the list? */ |
| for (current = list_start; current; current = current->next) |
| { |
| if (!strcmp (current->name, h->root.root.string)) |
| break; |
| } |
| if (!current && !discarded_section (s) && (bfd_section_flags (s) & SEC_ALLOC)) |
| { |
| /* Will this have an entry in the GOT. */ |
| if (ELF32_R_TYPE (internal_relocs->r_info) == R_LM32_16_GOT) |
| { |
| /* Create a new entry. */ |
| new_entry = malloc (sizeof (struct weak_symbol_list)); |
| if (!new_entry) |
| return false; |
| new_entry->name = h->root.root.string; |
| new_entry->next = NULL; |
| /* Add to list */ |
| if (list_start == NULL) |
| { |
| list_start = new_entry; |
| list_end = new_entry; |
| } |
| else |
| { |
| list_end->next = new_entry; |
| list_end = new_entry; |
| } |
| /* Increase count of undefined weak symbols in the got. */ |
| rgot_weak_count++; |
| } |
| } |
| } |
| internal_relocs++; |
| } |
| } |
| else |
| return false; |
| } |
| } |
| } |
| /* Free list. */ |
| while (list_start) |
| { |
| list_end = list_start->next; |
| free (list_start); |
| list_start = list_end; |
| } |
| |
| /* Size sections. */ |
| lm32fdpic_fixup32_section (info)->size |
| = (r32_count + (htab->root.sgot->size / 4) - rgot_weak_count + 1) * 4; |
| if (lm32fdpic_fixup32_section (info)->size == 0) |
| lm32fdpic_fixup32_section (info)->flags |= SEC_EXCLUDE; |
| else |
| { |
| lm32fdpic_fixup32_section (info)->contents = |
| bfd_zalloc (dynobj, lm32fdpic_fixup32_section (info)->size); |
| if (lm32fdpic_fixup32_section (info)->contents == NULL) |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Create dynamic sections when linking against a dynamic object. */ |
| |
| static bool |
| lm32_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info) |
| { |
| struct elf_lm32_link_hash_table *htab; |
| flagword flags, pltflags; |
| asection *s; |
| const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| int ptralign = 2; /* 32bit */ |
| |
| htab = lm32_elf_hash_table (info); |
| if (htab == NULL) |
| return false; |
| |
| /* Make sure we have a GOT - For the case where we have a dynamic object |
| but none of the relocs in check_relocs */ |
| if (!_bfd_elf_create_got_section (abfd, info)) |
| return false; |
| if (IS_FDPIC (abfd) && (htab->sfixup32 == NULL)) |
| { |
| if (! create_rofixup_section (abfd, info)) |
| return false; |
| } |
| |
| /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and |
| .rel[a].bss sections. */ |
| flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY |
| | SEC_LINKER_CREATED); |
| |
| pltflags = flags; |
| pltflags |= SEC_CODE; |
| if (bed->plt_not_loaded) |
| pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS); |
| if (bed->plt_readonly) |
| pltflags |= SEC_READONLY; |
| |
| s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags); |
| htab->root.splt = s; |
| if (s == NULL |
| || !bfd_set_section_alignment (s, bed->plt_alignment)) |
| return false; |
| |
| if (bed->want_plt_sym) |
| { |
| /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the |
| .plt section. */ |
| struct bfd_link_hash_entry *bh = NULL; |
| struct elf_link_hash_entry *h; |
| |
| if (! (_bfd_generic_link_add_one_symbol |
| (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, |
| (bfd_vma) 0, NULL, false, |
| get_elf_backend_data (abfd)->collect, &bh))) |
| return false; |
| h = (struct elf_link_hash_entry *) bh; |
| h->def_regular = 1; |
| h->type = STT_OBJECT; |
| htab->root.hplt = h; |
| |
| if (bfd_link_pic (info) |
| && ! bfd_elf_link_record_dynamic_symbol (info, h)) |
| return false; |
| } |
| |
| s = bfd_make_section_anyway_with_flags (abfd, |
| bed->default_use_rela_p |
| ? ".rela.plt" : ".rel.plt", |
| flags | SEC_READONLY); |
| htab->root.srelplt = s; |
| if (s == NULL |
| || !bfd_set_section_alignment (s, ptralign)) |
| return false; |
| |
| if (htab->root.sgot == NULL |
| && !_bfd_elf_create_got_section (abfd, info)) |
| return false; |
| |
| if (bed->want_dynbss) |
| { |
| /* The .dynbss section is a place to put symbols which are defined |
| by dynamic objects, are referenced by regular objects, and are |
| not functions. We must allocate space for them in the process |
| image and use a R_*_COPY reloc to tell the dynamic linker to |
| initialize them at run time. The linker script puts the .dynbss |
| section into the .bss section of the final image. */ |
| s = bfd_make_section_anyway_with_flags (abfd, ".dynbss", |
| SEC_ALLOC | SEC_LINKER_CREATED); |
| htab->sdynbss = s; |
| if (s == NULL) |
| return false; |
| /* The .rel[a].bss section holds copy relocs. This section is not |
| normally needed. We need to create it here, though, so that the |
| linker will map it to an output section. We can't just create it |
| only if we need it, because we will not know whether we need it |
| until we have seen all the input files, and the first time the |
| main linker code calls BFD after examining all the input files |
| (size_dynamic_sections) the input sections have already been |
| mapped to the output sections. If the section turns out not to |
| be needed, we can discard it later. We will never need this |
| section when generating a shared object, since they do not use |
| copy relocs. */ |
| if (! bfd_link_pic (info)) |
| { |
| s = bfd_make_section_anyway_with_flags (abfd, |
| (bed->default_use_rela_p |
| ? ".rela.bss" : ".rel.bss"), |
| flags | SEC_READONLY); |
| htab->srelbss = s; |
| if (s == NULL |
| || !bfd_set_section_alignment (s, ptralign)) |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| static bool |
| lm32_elf_always_size_sections (bfd *output_bfd, struct bfd_link_info *info) |
| { |
| if (!bfd_link_relocatable (info)) |
| { |
| if (!bfd_elf_stack_segment_size (output_bfd, info, |
| "__stacksize", DEFAULT_STACK_SIZE)) |
| return false; |
| |
| asection *sec = bfd_get_section_by_name (output_bfd, ".stack"); |
| if (sec) |
| sec->size = info->stacksize >= 0 ? info->stacksize : 0; |
| } |
| |
| return true; |
| } |
| |
| static bool |
| lm32_elf_fdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd) |
| { |
| unsigned i; |
| |
| if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
| || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
| return true; |
| |
| if (! _bfd_elf_copy_private_bfd_data (ibfd, obfd)) |
| return false; |
| |
| if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr |
| || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr) |
| return true; |
| |
| /* Copy the stack size. */ |
| for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++) |
| if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK) |
| { |
| Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i]; |
| |
| for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++) |
| if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK) |
| { |
| memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr)); |
| |
| /* Rewrite the phdrs, since we're only called after they were first written. */ |
| if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd) |
| ->s->sizeof_ehdr, SEEK_SET) != 0 |
| || get_elf_backend_data (obfd)->s->write_out_phdrs (obfd, elf_tdata (obfd)->phdr, |
| elf_elfheader (obfd)->e_phnum) != 0) |
| return false; |
| break; |
| } |
| |
| break; |
| } |
| |
| return true; |
| } |
| |
| |
| #define ELF_ARCH bfd_arch_lm32 |
| #define ELF_TARGET_ID LM32_ELF_DATA |
| #define ELF_MACHINE_CODE EM_LATTICEMICO32 |
| #define ELF_MAXPAGESIZE 0x1000 |
| |
| #define TARGET_BIG_SYM lm32_elf32_vec |
| #define TARGET_BIG_NAME "elf32-lm32" |
| |
| #define bfd_elf32_bfd_reloc_type_lookup lm32_reloc_type_lookup |
| #define bfd_elf32_bfd_reloc_name_lookup lm32_reloc_name_lookup |
| #define elf_info_to_howto lm32_info_to_howto_rela |
| #define elf_info_to_howto_rel NULL |
| #define elf_backend_rela_normal 1 |
| #define elf_backend_object_p lm32_elf_object_p |
| #define elf_backend_final_write_processing lm32_elf_final_write_processing |
| #define elf_backend_stack_align 8 |
| #define elf_backend_can_gc_sections 1 |
| #define elf_backend_can_refcount 1 |
| #define elf_backend_gc_mark_hook lm32_elf_gc_mark_hook |
| #define elf_backend_plt_readonly 1 |
| #define elf_backend_want_got_plt 1 |
| #define elf_backend_want_plt_sym 0 |
| #define elf_backend_got_header_size 12 |
| #define elf_backend_dtrel_excludes_plt 1 |
| #define bfd_elf32_bfd_link_hash_table_create lm32_elf_link_hash_table_create |
| #define elf_backend_check_relocs lm32_elf_check_relocs |
| #define elf_backend_reloc_type_class lm32_elf_reloc_type_class |
| #define elf_backend_size_dynamic_sections lm32_elf_size_dynamic_sections |
| #define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all |
| #define elf_backend_create_dynamic_sections lm32_elf_create_dynamic_sections |
| #define elf_backend_finish_dynamic_sections lm32_elf_finish_dynamic_sections |
| #define elf_backend_adjust_dynamic_symbol lm32_elf_adjust_dynamic_symbol |
| #define elf_backend_finish_dynamic_symbol lm32_elf_finish_dynamic_symbol |
| #define elf_backend_relocate_section lm32_elf_relocate_section |
| |
| #include "elf32-target.h" |
| |
| #undef ELF_MAXPAGESIZE |
| #define ELF_MAXPAGESIZE 0x4000 |
| |
| |
| #undef TARGET_BIG_SYM |
| #define TARGET_BIG_SYM lm32_elf32_fdpic_vec |
| #undef TARGET_BIG_NAME |
| #define TARGET_BIG_NAME "elf32-lm32fdpic" |
| #undef elf32_bed |
| #define elf32_bed elf32_lm32fdpic_bed |
| |
| #undef elf_backend_always_size_sections |
| #define elf_backend_always_size_sections lm32_elf_always_size_sections |
| #undef bfd_elf32_bfd_copy_private_bfd_data |
| #define bfd_elf32_bfd_copy_private_bfd_data lm32_elf_fdpic_copy_private_bfd_data |
| |
| #include "elf32-target.h" |