| /* BFD back-end for National Semiconductor's CRX ELF |
| Copyright (C) 2004-2024 Free Software Foundation, Inc. |
| Written by Tomer Levi, NSC, Israel. |
| |
| 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 "bfdlink.h" |
| #include "libbfd.h" |
| #include "elf-bfd.h" |
| #include "elf/crx.h" |
| |
| static reloc_howto_type *elf_crx_reloc_type_lookup |
| (bfd *, bfd_reloc_code_real_type); |
| static bool elf_crx_info_to_howto |
| (bfd *, arelent *, Elf_Internal_Rela *); |
| static bool elf32_crx_relax_delete_bytes |
| (struct bfd_link_info *, bfd *, asection *, bfd_vma, int); |
| static bfd_reloc_status_type crx_elf_final_link_relocate |
| (reloc_howto_type *, bfd *, bfd *, asection *, |
| bfd_byte *, bfd_vma, bfd_vma, bfd_vma, |
| struct bfd_link_info *, asection *, int); |
| static int elf32_crx_relocate_section |
| (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); |
| static bool elf32_crx_relax_section |
| (bfd *, asection *, struct bfd_link_info *, bool *); |
| static bfd_byte * elf32_crx_get_relocated_section_contents |
| (bfd *, struct bfd_link_info *, struct bfd_link_order *, |
| bfd_byte *, bool, asymbol **); |
| |
| /* crx_reloc_map array maps BFD relocation enum into a CRGAS relocation type. */ |
| |
| struct crx_reloc_map |
| { |
| bfd_reloc_code_real_type bfd_reloc_enum; /* BFD relocation enum. */ |
| unsigned short crx_reloc_type; /* CRX relocation type. */ |
| }; |
| |
| static const struct crx_reloc_map crx_reloc_map[R_CRX_MAX] = |
| { |
| {BFD_RELOC_NONE, R_CRX_NONE}, |
| {BFD_RELOC_CRX_REL4, R_CRX_REL4}, |
| {BFD_RELOC_CRX_REL8, R_CRX_REL8}, |
| {BFD_RELOC_CRX_REL8_CMP, R_CRX_REL8_CMP}, |
| {BFD_RELOC_CRX_REL16, R_CRX_REL16}, |
| {BFD_RELOC_CRX_REL24, R_CRX_REL24}, |
| {BFD_RELOC_CRX_REL32, R_CRX_REL32}, |
| {BFD_RELOC_CRX_REGREL12, R_CRX_REGREL12}, |
| {BFD_RELOC_CRX_REGREL22, R_CRX_REGREL22}, |
| {BFD_RELOC_CRX_REGREL28, R_CRX_REGREL28}, |
| {BFD_RELOC_CRX_REGREL32, R_CRX_REGREL32}, |
| {BFD_RELOC_CRX_ABS16, R_CRX_ABS16}, |
| {BFD_RELOC_CRX_ABS32, R_CRX_ABS32}, |
| {BFD_RELOC_CRX_NUM8, R_CRX_NUM8}, |
| {BFD_RELOC_CRX_NUM16, R_CRX_NUM16}, |
| {BFD_RELOC_CRX_NUM32, R_CRX_NUM32}, |
| {BFD_RELOC_CRX_IMM16, R_CRX_IMM16}, |
| {BFD_RELOC_CRX_IMM32, R_CRX_IMM32}, |
| {BFD_RELOC_CRX_SWITCH8, R_CRX_SWITCH8}, |
| {BFD_RELOC_CRX_SWITCH16, R_CRX_SWITCH16}, |
| {BFD_RELOC_CRX_SWITCH32, R_CRX_SWITCH32} |
| }; |
| |
| static reloc_howto_type crx_elf_howto_table[] = |
| { |
| HOWTO (R_CRX_NONE, /* type */ |
| 0, /* rightshift */ |
| 0, /* size */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_NONE", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_REL4, /* type */ |
| 1, /* rightshift */ |
| 1, /* size */ |
| 4, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_REL4", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xf, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_REL8, /* type */ |
| 1, /* rightshift */ |
| 1, /* size */ |
| 8, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_REL8", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_REL8_CMP, /* type */ |
| 1, /* rightshift */ |
| 1, /* size */ |
| 8, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_REL8_CMP", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_REL16, /* type */ |
| 1, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_REL16", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_REL24, /* type */ |
| 1, /* rightshift */ |
| 4, /* size */ |
| 24, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_REL24", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_REL32, /* type */ |
| 1, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_REL32", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_REGREL12, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 12, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_REGREL12", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xfff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_REGREL22, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 22, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_REGREL22", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0x3fffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_REGREL28, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 28, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_REGREL28", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xfffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_REGREL32, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_REGREL32", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_ABS16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_ABS16", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_ABS32, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_ABS32", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_NUM8, /* type */ |
| 0, /* rightshift */ |
| 1, /* size */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_NUM8", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_NUM16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_NUM16", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_NUM32, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_NUM32", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_IMM16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_IMM16", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_CRX_IMM32, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield,/* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_IMM32", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* An 8 bit switch table entry. This is generated for an expression |
| such as ``.byte L1 - L2''. The offset holds the difference |
| between the reloc address and L2. */ |
| HOWTO (R_CRX_SWITCH8, /* type */ |
| 0, /* rightshift */ |
| 1, /* size */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_SWITCH8", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* A 16 bit switch table entry. This is generated for an expression |
| such as ``.word L1 - L2''. The offset holds the difference |
| between the reloc address and L2. */ |
| HOWTO (R_CRX_SWITCH16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_SWITCH16", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* A 32 bit switch table entry. This is generated for an expression |
| such as ``.long L1 - L2''. The offset holds the difference |
| between the reloc address and L2. */ |
| HOWTO (R_CRX_SWITCH32, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_unsigned, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_CRX_SWITCH32", /* name */ |
| false, /* partial_inplace */ |
| 0x0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| true) /* pcrel_offset */ |
| }; |
| |
| /* Retrieve a howto ptr using a BFD reloc_code. */ |
| |
| static reloc_howto_type * |
| elf_crx_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| bfd_reloc_code_real_type code) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < R_CRX_MAX; i++) |
| if (code == crx_reloc_map[i].bfd_reloc_enum) |
| return &crx_elf_howto_table[crx_reloc_map[i].crx_reloc_type]; |
| |
| printf ("This relocation Type is not supported -0x%x\n", code); |
| return 0; |
| } |
| |
| static reloc_howto_type * |
| elf_crx_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
| const char *r_name) |
| { |
| unsigned int i; |
| |
| for (i = 0; |
| i < sizeof (crx_elf_howto_table) / sizeof (crx_elf_howto_table[0]); |
| i++) |
| if (crx_elf_howto_table[i].name != NULL |
| && strcasecmp (crx_elf_howto_table[i].name, r_name) == 0) |
| return &crx_elf_howto_table[i]; |
| |
| return NULL; |
| } |
| |
| /* Retrieve a howto ptr using an internal relocation entry. */ |
| |
| static bool |
| elf_crx_info_to_howto (bfd *abfd, arelent *cache_ptr, |
| Elf_Internal_Rela *dst) |
| { |
| unsigned int r_type = ELF32_R_TYPE (dst->r_info); |
| if (r_type >= R_CRX_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 = &crx_elf_howto_table[r_type]; |
| return true; |
| } |
| |
| /* Perform a relocation as part of a final link. */ |
| |
| static bfd_reloc_status_type |
| crx_elf_final_link_relocate (reloc_howto_type *howto, bfd *input_bfd, |
| bfd *output_bfd ATTRIBUTE_UNUSED, |
| asection *input_section, bfd_byte *contents, |
| bfd_vma offset, bfd_vma Rvalue, bfd_vma addend, |
| struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| asection *sec ATTRIBUTE_UNUSED, |
| int is_local ATTRIBUTE_UNUSED) |
| { |
| unsigned short r_type = howto->type; |
| bfd_byte *hit_data = contents + offset; |
| bfd_vma reloc_bits, check; |
| |
| switch (r_type) |
| { |
| case R_CRX_IMM16: |
| case R_CRX_IMM32: |
| case R_CRX_ABS16: |
| case R_CRX_ABS32: |
| case R_CRX_REL8_CMP: |
| case R_CRX_REL16: |
| case R_CRX_REL24: |
| case R_CRX_REL32: |
| case R_CRX_REGREL12: |
| case R_CRX_REGREL22: |
| case R_CRX_REGREL28: |
| case R_CRX_REGREL32: |
| /* 'hit_data' is relative to the start of the instruction, not the |
| relocation offset. Advance it to account for the exact offset. */ |
| hit_data += 2; |
| break; |
| |
| case R_CRX_REL4: |
| /* This relocation type is used only in 'Branch if Equal to 0' |
| instructions and requires special handling. */ |
| Rvalue -= 1; |
| break; |
| |
| case R_CRX_NONE: |
| return bfd_reloc_ok; |
| break; |
| |
| case R_CRX_SWITCH8: |
| case R_CRX_SWITCH16: |
| case R_CRX_SWITCH32: |
| /* We only care about the addend, where the difference between |
| expressions is kept. */ |
| Rvalue = 0; |
| |
| default: |
| break; |
| } |
| |
| if (howto->pc_relative) |
| { |
| /* Subtract the address of the section containing the location. */ |
| Rvalue -= (input_section->output_section->vma |
| + input_section->output_offset); |
| /* Subtract the position of the location within the section. */ |
| Rvalue -= offset; |
| } |
| |
| /* Add in supplied addend. */ |
| Rvalue += addend; |
| |
| /* Complain if the bitfield overflows, whether it is considered |
| as signed or unsigned. */ |
| check = Rvalue >> howto->rightshift; |
| |
| reloc_bits = ((bfd_vma) 1 << (howto->bitsize - 1) << 1) - 1; |
| |
| if ((check & ~reloc_bits) != 0 |
| && (check & ~reloc_bits) != ((bfd_vma) -1 & ~reloc_bits)) |
| { |
| /* The above right shift is incorrect for a signed |
| value. See if turning on the upper bits fixes the |
| overflow. */ |
| if (howto->rightshift && (bfd_signed_vma) Rvalue < 0) |
| { |
| check |= (bfd_vma) -1 & ~((bfd_vma) -1 >> howto->rightshift); |
| if ((check & ~reloc_bits) != ((bfd_vma) -1 & ~reloc_bits)) |
| return bfd_reloc_overflow; |
| } |
| else |
| return bfd_reloc_overflow; |
| } |
| |
| /* Drop unwanted bits from the value we are relocating to. */ |
| Rvalue >>= howto->rightshift; |
| |
| /* Apply dst_mask to select only relocatable part of the insn. */ |
| Rvalue &= howto->dst_mask; |
| |
| switch (bfd_get_reloc_size (howto)) |
| { |
| case 1: |
| if (r_type == R_CRX_REL4) |
| { |
| Rvalue <<= 4; |
| Rvalue |= (bfd_get_8 (input_bfd, hit_data) & 0x0f); |
| } |
| |
| bfd_put_8 (input_bfd, (unsigned char) Rvalue, hit_data); |
| break; |
| |
| case 2: |
| if (r_type == R_CRX_REGREL12) |
| Rvalue |= (bfd_get_16 (input_bfd, hit_data) & 0xf000); |
| |
| bfd_put_16 (input_bfd, Rvalue, hit_data); |
| break; |
| |
| case 4: |
| if (r_type == R_CRX_REL24 |
| || r_type == R_CRX_REGREL22 |
| || r_type == R_CRX_REGREL28) |
| Rvalue |= (((bfd_get_16 (input_bfd, hit_data) << 16) | |
| bfd_get_16 (input_bfd, hit_data + 2)) & ~howto->dst_mask); |
| |
| if (r_type == R_CRX_NUM32 || r_type == R_CRX_SWITCH32) |
| /* Relocation on DATA is purely little-endian, that is, for a |
| multi-byte datum, the lowest address in memory contains the |
| little end of the datum, that is, the least significant byte. |
| Therefore we use BFD's byte Putting functions. */ |
| bfd_put_32 (input_bfd, Rvalue, hit_data); |
| else |
| /* Relocation on INSTRUCTIONS is different : Instructions are |
| word-addressable, that is, each word itself is arranged according |
| to little-endian convention, whereas the words are arranged with |
| respect to one another in BIG ENDIAN fashion. |
| When there is an immediate value that spans a word boundary, it is |
| split in a big-endian way with respect to the words. */ |
| { |
| bfd_put_16 (input_bfd, (Rvalue >> 16) & 0xffff, hit_data); |
| bfd_put_16 (input_bfd, Rvalue & 0xffff, hit_data + 2); |
| } |
| break; |
| |
| default: |
| return bfd_reloc_notsupported; |
| } |
| |
| return bfd_reloc_ok; |
| } |
| |
| /* Delete some bytes from a section while relaxing. */ |
| |
| static bool |
| elf32_crx_relax_delete_bytes (struct bfd_link_info *link_info, bfd *abfd, |
| asection *sec, bfd_vma addr, int count) |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| unsigned int sec_shndx; |
| bfd_byte *contents; |
| Elf_Internal_Rela *irel, *irelend; |
| bfd_vma toaddr; |
| Elf_Internal_Sym *isym; |
| Elf_Internal_Sym *isymend; |
| struct elf_link_hash_entry **sym_hashes; |
| struct elf_link_hash_entry **end_hashes; |
| struct elf_link_hash_entry **start_hashes; |
| unsigned int symcount; |
| |
| sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| |
| contents = elf_section_data (sec)->this_hdr.contents; |
| |
| toaddr = sec->size; |
| |
| irel = elf_section_data (sec)->relocs; |
| irelend = irel + sec->reloc_count; |
| |
| /* Actually delete the bytes. */ |
| memmove (contents + addr, contents + addr + count, |
| (size_t) (toaddr - addr - count)); |
| sec->size -= count; |
| |
| /* Adjust all the relocs. */ |
| for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
| { |
| /* Get the new reloc address. */ |
| if ((irel->r_offset > addr |
| && irel->r_offset < toaddr)) |
| irel->r_offset -= count; |
| } |
| |
| /* Adjust the local symbols defined in this section. */ |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| isym = (Elf_Internal_Sym *) symtab_hdr->contents; |
| for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) |
| { |
| if (isym->st_shndx == sec_shndx |
| && isym->st_value > addr |
| && isym->st_value < toaddr) |
| { |
| /* Adjust the addend of SWITCH relocations in this section, |
| which reference this local symbol. */ |
| for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
| { |
| unsigned long r_symndx; |
| Elf_Internal_Sym *rsym; |
| bfd_vma addsym, subsym; |
| |
| /* Skip if not a SWITCH relocation. */ |
| if (ELF32_R_TYPE (irel->r_info) != (int) R_CRX_SWITCH8 |
| && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_SWITCH16 |
| && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_SWITCH32) |
| continue; |
| |
| r_symndx = ELF32_R_SYM (irel->r_info); |
| rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx; |
| |
| /* Skip if not the local adjusted symbol. */ |
| if (rsym != isym) |
| continue; |
| |
| addsym = isym->st_value; |
| subsym = addsym - irel->r_addend; |
| |
| /* Fix the addend only when -->> (addsym > addr >= subsym). */ |
| if (subsym <= addr) |
| irel->r_addend -= count; |
| else |
| continue; |
| } |
| |
| isym->st_value -= count; |
| } |
| } |
| |
| /* Now adjust the global symbols defined in this section. */ |
| symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) |
| - symtab_hdr->sh_info); |
| sym_hashes = start_hashes = elf_sym_hashes (abfd); |
| end_hashes = sym_hashes + symcount; |
| |
| for (; sym_hashes < end_hashes; sym_hashes++) |
| { |
| struct elf_link_hash_entry *sym_hash = *sym_hashes; |
| |
| /* The '--wrap SYMBOL' option is causing a pain when the object file, |
| containing the definition of __wrap_SYMBOL, includes a direct |
| call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference |
| the same symbol (which is __wrap_SYMBOL), but still exist as two |
| different symbols in 'sym_hashes', we don't want to adjust |
| the global symbol __wrap_SYMBOL twice. |
| This check is only relevant when symbols are being wrapped. */ |
| if (link_info->wrap_hash != NULL) |
| { |
| struct elf_link_hash_entry **cur_sym_hashes; |
| |
| /* Loop only over the symbols whom been already checked. */ |
| for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes; |
| cur_sym_hashes++) |
| { |
| /* If the current symbol is identical to 'sym_hash', that means |
| the symbol was already adjusted (or at least checked). */ |
| if (*cur_sym_hashes == sym_hash) |
| break; |
| } |
| /* Don't adjust the symbol again. */ |
| if (cur_sym_hashes < sym_hashes) |
| continue; |
| } |
| |
| if ((sym_hash->root.type == bfd_link_hash_defined |
| || sym_hash->root.type == bfd_link_hash_defweak) |
| && sym_hash->root.u.def.section == sec |
| && sym_hash->root.u.def.value > addr |
| && sym_hash->root.u.def.value < toaddr) |
| sym_hash->root.u.def.value -= count; |
| } |
| |
| return true; |
| } |
| |
| /* This is a version of bfd_generic_get_relocated_section_contents |
| which uses elf32_crx_relocate_section. */ |
| |
| static bfd_byte * |
| elf32_crx_get_relocated_section_contents (bfd *output_bfd, |
| struct bfd_link_info *link_info, |
| struct bfd_link_order *link_order, |
| bfd_byte *data, |
| bool relocatable, |
| asymbol **symbols) |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| asection *input_section = link_order->u.indirect.section; |
| bfd *input_bfd = input_section->owner; |
| asection **sections = NULL; |
| Elf_Internal_Rela *internal_relocs = NULL; |
| Elf_Internal_Sym *isymbuf = NULL; |
| |
| /* We only need to handle the case of relaxing, or of having a |
| particular set of section contents, specially. */ |
| if (relocatable |
| || elf_section_data (input_section)->this_hdr.contents == NULL) |
| return bfd_generic_get_relocated_section_contents (output_bfd, link_info, |
| link_order, data, |
| relocatable, |
| symbols); |
| |
| symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
| |
| bfd_byte *orig_data = data; |
| if (data == NULL) |
| { |
| data = bfd_malloc (input_section->size); |
| if (data == NULL) |
| return NULL; |
| } |
| memcpy (data, elf_section_data (input_section)->this_hdr.contents, |
| (size_t) input_section->size); |
| |
| if ((input_section->flags & SEC_RELOC) != 0 |
| && input_section->reloc_count > 0) |
| { |
| Elf_Internal_Sym *isym; |
| Elf_Internal_Sym *isymend; |
| asection **secpp; |
| bfd_size_type amt; |
| |
| internal_relocs = (_bfd_elf_link_read_relocs |
| (input_bfd, input_section, NULL, |
| (Elf_Internal_Rela *) NULL, false)); |
| if (internal_relocs == NULL) |
| goto error_return; |
| |
| if (symtab_hdr->sh_info != 0) |
| { |
| isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| if (isymbuf == NULL) |
| isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, |
| symtab_hdr->sh_info, 0, |
| NULL, NULL, NULL); |
| if (isymbuf == NULL) |
| goto error_return; |
| } |
| |
| amt = symtab_hdr->sh_info; |
| amt *= sizeof (asection *); |
| sections = bfd_malloc (amt); |
| if (sections == NULL && amt != 0) |
| goto error_return; |
| |
| isymend = isymbuf + symtab_hdr->sh_info; |
| for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) |
| { |
| asection *isec; |
| |
| if (isym->st_shndx == SHN_UNDEF) |
| isec = bfd_und_section_ptr; |
| else if (isym->st_shndx == SHN_ABS) |
| isec = bfd_abs_section_ptr; |
| else if (isym->st_shndx == SHN_COMMON) |
| isec = bfd_com_section_ptr; |
| else |
| isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); |
| |
| *secpp = isec; |
| } |
| |
| if (! elf32_crx_relocate_section (output_bfd, link_info, input_bfd, |
| input_section, data, internal_relocs, |
| isymbuf, sections)) |
| goto error_return; |
| |
| free (sections); |
| if (symtab_hdr->contents != (unsigned char *) isymbuf) |
| free (isymbuf); |
| if (elf_section_data (input_section)->relocs != internal_relocs) |
| free (internal_relocs); |
| } |
| |
| return data; |
| |
| error_return: |
| free (sections); |
| if (symtab_hdr->contents != (unsigned char *) isymbuf) |
| free (isymbuf); |
| if (elf_section_data (input_section)->relocs != internal_relocs) |
| free (internal_relocs); |
| if (orig_data == NULL) |
| free (data); |
| return NULL; |
| } |
| |
| /* Relocate a CRX ELF section. */ |
| |
| static int |
| elf32_crx_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; |
| struct elf_link_hash_entry **sym_hashes; |
| Elf_Internal_Rela *rel, *relend; |
| |
| 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++) |
| { |
| int r_type; |
| reloc_howto_type *howto; |
| unsigned long r_symndx; |
| Elf_Internal_Sym *sym; |
| asection *sec; |
| struct elf_link_hash_entry *h; |
| bfd_vma relocation; |
| bfd_reloc_status_type r; |
| |
| r_symndx = ELF32_R_SYM (rel->r_info); |
| r_type = ELF32_R_TYPE (rel->r_info); |
| howto = crx_elf_howto_table + (r_type); |
| |
| h = NULL; |
| sym = NULL; |
| sec = NULL; |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| sym = local_syms + r_symndx; |
| sec = local_sections[r_symndx]; |
| relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
| } |
| else |
| { |
| bool unresolved_reloc, 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); |
| } |
| |
| 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)) |
| continue; |
| |
| r = crx_elf_final_link_relocate (howto, input_bfd, output_bfd, |
| input_section, |
| contents, rel->r_offset, |
| relocation, rel->r_addend, |
| info, sec, h == NULL); |
| |
| if (r != bfd_reloc_ok) |
| { |
| const char *name; |
| const char *msg = (const char *) 0; |
| |
| 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: |
| (*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; |
| } |
| |
| /* This function handles relaxing for the CRX. |
| |
| There's quite a few relaxing opportunites available on the CRX: |
| |
| * bal/bcond:32 -> bal/bcond:16 2 bytes |
| * bcond:16 -> bcond:8 2 bytes |
| * cmpbcond:24 -> cmpbcond:8 2 bytes |
| * arithmetic imm32 -> arithmetic imm16 2 bytes |
| |
| Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */ |
| |
| static bool |
| elf32_crx_relax_section (bfd *abfd, asection *sec, |
| struct bfd_link_info *link_info, bool *again) |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| Elf_Internal_Rela *internal_relocs; |
| Elf_Internal_Rela *irel, *irelend; |
| bfd_byte *contents = NULL; |
| Elf_Internal_Sym *isymbuf = NULL; |
| |
| /* Assume nothing changes. */ |
| *again = false; |
| |
| /* We don't have to do anything for a relocatable link, if |
| this section does not have relocs, or if this is not a |
| code section. */ |
| if (bfd_link_relocatable (link_info) |
| || sec->reloc_count == 0 |
| || (sec->flags & SEC_RELOC) == 0 |
| || (sec->flags & SEC_HAS_CONTENTS) == 0 |
| || (sec->flags & SEC_CODE) == 0) |
| return true; |
| |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| |
| /* Get a copy of the native relocations. */ |
| internal_relocs = (_bfd_elf_link_read_relocs |
| (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, |
| link_info->keep_memory)); |
| if (internal_relocs == NULL) |
| goto error_return; |
| |
| /* Walk through them looking for relaxing opportunities. */ |
| irelend = internal_relocs + sec->reloc_count; |
| for (irel = internal_relocs; irel < irelend; irel++) |
| { |
| bfd_vma symval; |
| |
| /* If this isn't something that can be relaxed, then ignore |
| this reloc. */ |
| if (ELF32_R_TYPE (irel->r_info) != (int) R_CRX_REL32 |
| && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_REL16 |
| && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_REL24 |
| && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_IMM32) |
| continue; |
| |
| /* Get the section contents if we haven't done so already. */ |
| if (contents == NULL) |
| { |
| /* Get cached copy if it exists. */ |
| if (elf_section_data (sec)->this_hdr.contents != NULL) |
| contents = elf_section_data (sec)->this_hdr.contents; |
| /* Go get them off disk. */ |
| else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) |
| goto error_return; |
| } |
| |
| /* Read this BFD's local symbols if we haven't done so already. */ |
| if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
| { |
| isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| if (isymbuf == NULL) |
| isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| symtab_hdr->sh_info, 0, |
| NULL, NULL, NULL); |
| if (isymbuf == NULL) |
| goto error_return; |
| } |
| |
| /* Get the value of the symbol referred to by the reloc. */ |
| if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) |
| { |
| /* A local symbol. */ |
| Elf_Internal_Sym *isym; |
| asection *sym_sec; |
| |
| isym = isymbuf + ELF32_R_SYM (irel->r_info); |
| if (isym->st_shndx == SHN_UNDEF) |
| sym_sec = bfd_und_section_ptr; |
| else if (isym->st_shndx == SHN_ABS) |
| sym_sec = bfd_abs_section_ptr; |
| else if (isym->st_shndx == SHN_COMMON) |
| sym_sec = bfd_com_section_ptr; |
| else |
| sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| symval = (isym->st_value |
| + sym_sec->output_section->vma |
| + sym_sec->output_offset); |
| } |
| else |
| { |
| unsigned long indx; |
| struct elf_link_hash_entry *h; |
| |
| /* An external symbol. */ |
| indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; |
| h = elf_sym_hashes (abfd)[indx]; |
| BFD_ASSERT (h != NULL); |
| |
| if (h->root.type != bfd_link_hash_defined |
| && h->root.type != bfd_link_hash_defweak) |
| /* This appears to be a reference to an undefined |
| symbol. Just ignore it--it will be caught by the |
| regular reloc processing. */ |
| continue; |
| |
| symval = (h->root.u.def.value |
| + h->root.u.def.section->output_section->vma |
| + h->root.u.def.section->output_offset); |
| } |
| |
| /* For simplicity of coding, we are going to modify the section |
| contents, the section relocs, and the BFD symbol table. We |
| must tell the rest of the code not to free up this |
| information. It would be possible to instead create a table |
| of changes which have to be made, as is done in coff-mips.c; |
| that would be more work, but would require less memory when |
| the linker is run. */ |
| |
| /* Try to turn a 32bit pc-relative branch/call into |
| a 16bit pc-relative branch/call. */ |
| if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_REL32) |
| { |
| bfd_vma value = symval; |
| |
| /* Deal with pc-relative gunk. */ |
| value -= (sec->output_section->vma + sec->output_offset); |
| value -= irel->r_offset; |
| value += irel->r_addend; |
| |
| /* See if the value will fit in 16 bits, note the high value is |
| 0xfffe + 2 as the target will be two bytes closer if we are |
| able to relax. */ |
| if ((long) value < 0x10000 && (long) value > -0x10002) |
| { |
| unsigned short code; |
| |
| /* Get the opcode. */ |
| code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); |
| |
| /* Verify it's a 'bal'/'bcond' and fix the opcode. */ |
| if ((code & 0xfff0) == 0x3170) |
| bfd_put_8 (abfd, 0x30, contents + irel->r_offset + 1); |
| else if ((code & 0xf0ff) == 0x707f) |
| bfd_put_8 (abfd, 0x7e, contents + irel->r_offset); |
| else |
| continue; |
| |
| /* Note that we've changed the relocs, section contents, etc. */ |
| elf_section_data (sec)->relocs = internal_relocs; |
| elf_section_data (sec)->this_hdr.contents = contents; |
| symtab_hdr->contents = (unsigned char *) isymbuf; |
| |
| /* Fix the relocation's type. */ |
| irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| R_CRX_REL16); |
| |
| /* Delete two bytes of data. */ |
| if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec, |
| irel->r_offset + 2, 2)) |
| goto error_return; |
| |
| /* That will change things, so, we should relax again. |
| Note that this is not required, and it may be slow. */ |
| *again = true; |
| } |
| } |
| |
| /* Try to turn a 16bit pc-relative branch into an |
| 8bit pc-relative branch. */ |
| if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_REL16) |
| { |
| bfd_vma value = symval; |
| |
| /* Deal with pc-relative gunk. */ |
| value -= (sec->output_section->vma + sec->output_offset); |
| value -= irel->r_offset; |
| value += irel->r_addend; |
| |
| /* See if the value will fit in 8 bits, note the high value is |
| 0xfc + 2 as the target will be two bytes closer if we are |
| able to relax. */ |
| if ((long) value < 0xfe && (long) value > -0x100) |
| { |
| unsigned short code; |
| |
| /* Get the opcode. */ |
| code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); |
| |
| /* Verify it's a 'bcond' opcode. */ |
| if ((code & 0xf0ff) != 0x707e) |
| continue; |
| |
| /* Note that we've changed the relocs, section contents, etc. */ |
| elf_section_data (sec)->relocs = internal_relocs; |
| elf_section_data (sec)->this_hdr.contents = contents; |
| symtab_hdr->contents = (unsigned char *) isymbuf; |
| |
| /* Fix the relocation's type. */ |
| irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| R_CRX_REL8); |
| |
| /* Delete two bytes of data. */ |
| if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec, |
| irel->r_offset + 2, 2)) |
| goto error_return; |
| |
| /* That will change things, so, we should relax again. |
| Note that this is not required, and it may be slow. */ |
| *again = true; |
| } |
| } |
| |
| /* Try to turn a 24bit pc-relative cmp&branch into |
| an 8bit pc-relative cmp&branch. */ |
| if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_REL24) |
| { |
| bfd_vma value = symval; |
| |
| /* Deal with pc-relative gunk. */ |
| value -= (sec->output_section->vma + sec->output_offset); |
| value -= irel->r_offset; |
| value += irel->r_addend; |
| |
| /* See if the value will fit in 8 bits, note the high value is |
| 0x7e + 2 as the target will be two bytes closer if we are |
| able to relax. */ |
| if ((long) value < 0x100 && (long) value > -0x100) |
| { |
| unsigned short code; |
| |
| /* Get the opcode. */ |
| code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); |
| |
| /* Verify it's a 'cmp&branch' opcode. */ |
| if ((code & 0xfff0) != 0x3180 && (code & 0xfff0) != 0x3190 |
| && (code & 0xfff0) != 0x31a0 && (code & 0xfff0) != 0x31c0 |
| && (code & 0xfff0) != 0x31d0 && (code & 0xfff0) != 0x31e0 |
| /* Or a Co-processor branch ('bcop'). */ |
| && (code & 0xfff0) != 0x3010 && (code & 0xfff0) != 0x3110) |
| continue; |
| |
| /* Note that we've changed the relocs, section contents, etc. */ |
| elf_section_data (sec)->relocs = internal_relocs; |
| elf_section_data (sec)->this_hdr.contents = contents; |
| symtab_hdr->contents = (unsigned char *) isymbuf; |
| |
| /* Fix the opcode. */ |
| bfd_put_8 (abfd, 0x30, contents + irel->r_offset + 1); |
| |
| /* Fix the relocation's type. */ |
| irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| R_CRX_REL8_CMP); |
| |
| /* Delete two bytes of data. */ |
| if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec, |
| irel->r_offset + 4, 2)) |
| goto error_return; |
| |
| /* That will change things, so, we should relax again. |
| Note that this is not required, and it may be slow. */ |
| *again = true; |
| } |
| } |
| |
| /* Try to turn a 32bit immediate address into |
| a 16bit immediate address. */ |
| if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_IMM32) |
| { |
| bfd_vma value = symval; |
| |
| /* See if the value will fit in 16 bits. */ |
| if ((long) value < 0x7fff && (long) value > -0x8000) |
| { |
| unsigned short code; |
| |
| /* Get the opcode. */ |
| code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset); |
| |
| /* Verify it's a 'arithmetic double'. */ |
| if ((code & 0xf0f0) != 0x20f0) |
| continue; |
| |
| /* Note that we've changed the relocs, section contents, etc. */ |
| elf_section_data (sec)->relocs = internal_relocs; |
| elf_section_data (sec)->this_hdr.contents = contents; |
| symtab_hdr->contents = (unsigned char *) isymbuf; |
| |
| /* Fix the opcode. */ |
| bfd_put_8 (abfd, (code & 0xff) - 0x10, contents + irel->r_offset); |
| |
| /* Fix the relocation's type. */ |
| irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), |
| R_CRX_IMM16); |
| |
| /* Delete two bytes of data. */ |
| if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec, |
| irel->r_offset + 2, 2)) |
| goto error_return; |
| |
| /* That will change things, so, we should relax again. |
| Note that this is not required, and it may be slow. */ |
| *again = true; |
| } |
| } |
| } |
| |
| if (isymbuf != NULL |
| && symtab_hdr->contents != (unsigned char *) isymbuf) |
| { |
| if (! link_info->keep_memory) |
| free (isymbuf); |
| else |
| { |
| /* Cache the symbols for elf_link_input_bfd. */ |
| symtab_hdr->contents = (unsigned char *) isymbuf; |
| } |
| } |
| |
| if (contents != NULL |
| && elf_section_data (sec)->this_hdr.contents != contents) |
| { |
| if (! link_info->keep_memory) |
| free (contents); |
| else |
| { |
| /* Cache the section contents for elf_link_input_bfd. */ |
| elf_section_data (sec)->this_hdr.contents = contents; |
| } |
| } |
| |
| if (elf_section_data (sec)->relocs != internal_relocs) |
| free (internal_relocs); |
| |
| return true; |
| |
| error_return: |
| if (symtab_hdr->contents != (unsigned char *) isymbuf) |
| free (isymbuf); |
| if (elf_section_data (sec)->this_hdr.contents != contents) |
| free (contents); |
| if (elf_section_data (sec)->relocs != internal_relocs) |
| free (internal_relocs); |
| |
| return false; |
| } |
| |
| /* Definitions for setting CRX target vector. */ |
| #define TARGET_LITTLE_SYM crx_elf32_vec |
| #define TARGET_LITTLE_NAME "elf32-crx" |
| #define ELF_ARCH bfd_arch_crx |
| #define ELF_MACHINE_CODE EM_CRX |
| #define ELF_MAXPAGESIZE 0x1 |
| #define elf_symbol_leading_char '_' |
| |
| #define bfd_elf32_bfd_reloc_type_lookup elf_crx_reloc_type_lookup |
| #define bfd_elf32_bfd_reloc_name_lookup \ |
| elf_crx_reloc_name_lookup |
| #define elf_info_to_howto elf_crx_info_to_howto |
| #define elf_info_to_howto_rel NULL |
| #define elf_backend_relocate_section elf32_crx_relocate_section |
| #define bfd_elf32_bfd_relax_section elf32_crx_relax_section |
| #define bfd_elf32_bfd_get_relocated_section_contents \ |
| elf32_crx_get_relocated_section_contents |
| #define elf_backend_can_gc_sections 1 |
| #define elf_backend_rela_normal 1 |
| |
| #include "elf32-target.h" |