| /* M16C/M32C specific support for 32-bit ELF. |
| Copyright (C) 2005-2024 Free Software Foundation, Inc. |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 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/m32c.h" |
| #include "libiberty.h" |
| |
| /* Forward declarations. */ |
| static reloc_howto_type * m32c_reloc_type_lookup |
| (bfd *, bfd_reloc_code_real_type); |
| static bool m32c_info_to_howto_rela |
| (bfd *, arelent *, Elf_Internal_Rela *); |
| static int m32c_elf_relocate_section |
| (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); |
| static bool m32c_elf_check_relocs |
| (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); |
| static bool m32c_elf_relax_delete_bytes (bfd *, asection *, bfd_vma, int); |
| #ifdef DEBUG |
| char * m32c_get_reloc (long reloc); |
| void dump_symtab (bfd *, void *, void *); |
| #endif |
| static bool m32c_elf_relax_section |
| (bfd *abfd, asection *sec, struct bfd_link_info *link_info, bool *again); |
| static bfd_reloc_status_type m32c_apply_reloc_24 |
| (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| |
| |
| static reloc_howto_type m32c_elf_howto_table [] = |
| { |
| /* This reloc does nothing. */ |
| HOWTO (R_M32C_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_M32C_NONE", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* GCC intentionally overflows these next two in order to work |
| around limitations in the addressing modes, so don't complain |
| about overflow. */ |
| HOWTO (R_M32C_16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M32C_16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_M32C_24, /* type */ |
| 0, /* rightshift */ |
| 4, /* size */ |
| 24, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| m32c_apply_reloc_24, /* special_function */ |
| "R_M32C_24", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_M32C_32, /* 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_M32C_32", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_M32C_8_PCREL, /* type */ |
| 0, /* rightshift */ |
| 1, /* size */ |
| 8, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M32C_8_PCREL", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| HOWTO (R_M32C_16_PCREL, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M32C_16_PCREL", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| HOWTO (R_M32C_8, /* 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_M32C_8", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_M32C_LO16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M32C_LO16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_M32C_HI8, /* type */ |
| 0, /* rightshift */ |
| 1, /* size */ |
| 8, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M32C_HI8", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_M32C_HI16, /* type */ |
| 0, /* rightshift */ |
| 2, /* size */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M32C_HI16", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_M32C_RL_JUMP, /* type */ |
| 0, /* rightshift */ |
| 0, /* size */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M32C_RL_JUMP", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_M32C_RL_1ADDR, /* type */ |
| 0, /* rightshift */ |
| 0, /* size */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M32C_RL_1ADDR", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| HOWTO (R_M32C_RL_2ADDR, /* type */ |
| 0, /* rightshift */ |
| 0, /* size */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_M32C_RL_2ADDR", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| }; |
| |
| /* Map BFD reloc types to M32C ELF reloc types. */ |
| |
| struct m32c_reloc_map |
| { |
| bfd_reloc_code_real_type bfd_reloc_val; |
| unsigned int m32c_reloc_val; |
| }; |
| |
| static const struct m32c_reloc_map m32c_reloc_map [] = |
| { |
| { BFD_RELOC_NONE, R_M32C_NONE }, |
| { BFD_RELOC_16, R_M32C_16 }, |
| { BFD_RELOC_24, R_M32C_24 }, |
| { BFD_RELOC_32, R_M32C_32 }, |
| { BFD_RELOC_8_PCREL, R_M32C_8_PCREL }, |
| { BFD_RELOC_16_PCREL, R_M32C_16_PCREL }, |
| { BFD_RELOC_8, R_M32C_8 }, |
| { BFD_RELOC_LO16, R_M32C_LO16 }, |
| { BFD_RELOC_HI16, R_M32C_HI16 }, |
| { BFD_RELOC_M32C_HI8, R_M32C_HI8 }, |
| { BFD_RELOC_M32C_RL_JUMP, R_M32C_RL_JUMP }, |
| { BFD_RELOC_M32C_RL_1ADDR, R_M32C_RL_1ADDR }, |
| { BFD_RELOC_M32C_RL_2ADDR, R_M32C_RL_2ADDR } |
| }; |
| |
| static reloc_howto_type * |
| m32c_reloc_type_lookup |
| (bfd * abfd ATTRIBUTE_UNUSED, |
| bfd_reloc_code_real_type code) |
| { |
| unsigned int i; |
| |
| for (i = ARRAY_SIZE (m32c_reloc_map); i--;) |
| if (m32c_reloc_map [i].bfd_reloc_val == code) |
| return & m32c_elf_howto_table [m32c_reloc_map[i].m32c_reloc_val]; |
| |
| return NULL; |
| } |
| |
| static reloc_howto_type * |
| m32c_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name) |
| { |
| unsigned int i; |
| |
| for (i = 0; |
| i < sizeof (m32c_elf_howto_table) / sizeof (m32c_elf_howto_table[0]); |
| i++) |
| if (m32c_elf_howto_table[i].name != NULL |
| && strcasecmp (m32c_elf_howto_table[i].name, r_name) == 0) |
| return &m32c_elf_howto_table[i]; |
| |
| return NULL; |
| } |
| |
| /* Set the howto pointer for an M32C ELF reloc. */ |
| |
| static bool |
| m32c_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_M32C_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 = & m32c_elf_howto_table [r_type]; |
| return true; |
| } |
| |
| |
| |
| /* Apply R_M32C_24 relocations. We have to do this because it's not a |
| power-of-two size, and the generic code may think it overruns the |
| section if it's right at the end. |
| |
| Must return something other than bfd_reloc_continue to avoid the |
| above problem. Typical return values include bfd_reloc_ok or |
| bfd_reloc_overflow. |
| */ |
| |
| static bfd_reloc_status_type m32c_apply_reloc_24 (bfd *abfd ATTRIBUTE_UNUSED, |
| arelent *reloc_entry, |
| asymbol *symbol, |
| void *vdata_start ATTRIBUTE_UNUSED, |
| asection *input_section, |
| bfd *ibfd ATTRIBUTE_UNUSED, |
| char **error_msg ATTRIBUTE_UNUSED) |
| { |
| bfd_vma relocation; |
| bfd_reloc_status_type s; |
| |
| s = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, |
| vdata_start, |
| input_section, ibfd, error_msg); |
| if (s != bfd_reloc_continue) |
| return s; |
| |
| /* Get symbol value. (Common symbols are special.) */ |
| if (bfd_is_com_section (symbol->section)) |
| relocation = 0; |
| else |
| relocation = symbol->value; |
| |
| relocation += symbol->section->output_offset; |
| |
| /* Add in supplied addend. */ |
| relocation += reloc_entry->addend; |
| |
| reloc_entry->addend = relocation; |
| reloc_entry->address += input_section->output_offset; |
| return bfd_reloc_ok; |
| } |
| |
| /* Relocate an M32C ELF section. |
| There is some attempt to make this function usable for many architectures, |
| both USE_REL and USE_RELA ['twould be nice if such a critter existed], |
| if only to serve as a learning tool. |
| |
| The RELOCATE_SECTION function is called by the new ELF backend linker |
| to handle the relocations for a section. |
| |
| The relocs are always passed as Rela structures; if the section |
| actually uses Rel structures, the r_addend field will always be |
| zero. |
| |
| This function is responsible for adjusting the section contents as |
| necessary, and (if using Rela relocs and generating a relocatable |
| output file) adjusting the reloc addend as necessary. |
| |
| This function does not have to worry about setting the reloc |
| address or the reloc symbol index. |
| |
| LOCAL_SYMS is a pointer to the swapped in local symbols. |
| |
| LOCAL_SECTIONS is an array giving the section in the input file |
| corresponding to the st_shndx field of each local symbol. |
| |
| The global hash table entry for the global symbols can be found |
| via elf_sym_hashes (input_bfd). |
| |
| When generating relocatable output, this function must handle |
| STB_LOCAL/STT_SECTION symbols specially. The output symbol is |
| going to be the section symbol corresponding to the output |
| section, which means that the addend must be adjusted |
| accordingly. */ |
| |
| static int |
| m32c_elf_relocate_section |
| (bfd * output_bfd ATTRIBUTE_UNUSED, |
| 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; |
| Elf_Internal_Rela * relend; |
| asection *splt; |
| |
| symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (input_bfd); |
| relend = relocs + input_section->reloc_count; |
| |
| splt = elf_hash_table (info)->splt; |
| |
| for (rel = relocs; rel < relend; rel ++) |
| { |
| 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; |
| const char * name = NULL; |
| int r_type; |
| |
| r_type = ELF32_R_TYPE (rel->r_info); |
| |
| /* These are only used for relaxing; we don't actually relocate |
| anything with them, so skip them. */ |
| if (r_type == R_M32C_RL_JUMP |
| || r_type == R_M32C_RL_1ADDR |
| || r_type == R_M32C_RL_2ADDR) |
| continue; |
| |
| r_symndx = ELF32_R_SYM (rel->r_info); |
| |
| howto = m32c_elf_howto_table + ELF32_R_TYPE (rel->r_info); |
| h = NULL; |
| sym = NULL; |
| sec = NULL; |
| relocation = 0; |
| |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| sym = local_syms + r_symndx; |
| sec = local_sections [r_symndx]; |
| relocation = (sec->output_section->vma |
| + sec->output_offset |
| + sym->st_value); |
| |
| name = bfd_elf_string_from_elf_section |
| (input_bfd, symtab_hdr->sh_link, sym->st_name); |
| name = sym->st_name == 0 ? bfd_section_name (sec) : name; |
| } |
| else |
| { |
| h = sym_hashes [r_symndx - symtab_hdr->sh_info]; |
| |
| if (info->wrap_hash != NULL |
| && (input_section->flags & SEC_DEBUGGING) != 0) |
| h = ((struct elf_link_hash_entry *) |
| unwrap_hash_lookup (info, input_bfd, &h->root)); |
| |
| 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; |
| |
| name = h->root.root.string; |
| |
| if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| sec = h->root.u.def.section; |
| relocation = (h->root.u.def.value |
| + sec->output_section->vma |
| + sec->output_offset); |
| } |
| else if (h->root.type == bfd_link_hash_undefweak) |
| ; |
| else if (!bfd_link_relocatable (info)) |
| (*info->callbacks->undefined_symbol) (info, h->root.root.string, |
| input_bfd, input_section, |
| rel->r_offset, true); |
| } |
| |
| 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) |
| rel->r_addend += sec->output_offset; |
| continue; |
| } |
| |
| switch (ELF32_R_TYPE (rel->r_info)) |
| { |
| case R_M32C_16: |
| { |
| bfd_vma *plt_offset; |
| |
| if (h != NULL) |
| plt_offset = &h->plt.offset; |
| else |
| plt_offset = elf_local_got_offsets (input_bfd) + r_symndx; |
| |
| /* printf("%s: rel %x plt %d\n", h ? h->root.root.string : "(none)", |
| relocation, *plt_offset);*/ |
| if (relocation <= 0xffff) |
| { |
| /* If the symbol is in range for a 16-bit address, we should |
| have deallocated the plt entry in relax_section. */ |
| BFD_ASSERT (*plt_offset == (bfd_vma) -1); |
| } |
| else |
| { |
| /* If the symbol is out of range for a 16-bit address, |
| we must have allocated a plt entry. */ |
| BFD_ASSERT (*plt_offset != (bfd_vma) -1); |
| |
| /* If this is the first time we've processed this symbol, |
| fill in the plt entry with the correct symbol address. */ |
| if ((*plt_offset & 1) == 0) |
| { |
| unsigned int x; |
| |
| x = 0x000000fc; /* jmpf */ |
| x |= (relocation << 8) & 0xffffff00; |
| bfd_put_32 (input_bfd, x, splt->contents + *plt_offset); |
| *plt_offset |= 1; |
| } |
| |
| relocation = (splt->output_section->vma |
| + splt->output_offset |
| + (*plt_offset & -2)); |
| if (name) |
| { |
| char *newname = bfd_malloc (strlen(name)+5); |
| strcpy (newname, name); |
| strcat(newname, ".plt"); |
| _bfd_generic_link_add_one_symbol (info, |
| input_bfd, |
| newname, |
| BSF_FUNCTION | BSF_WEAK, |
| splt, |
| (*plt_offset & -2), |
| 0, |
| 1, |
| 0, |
| 0); |
| } |
| } |
| } |
| break; |
| |
| case R_M32C_HI8: |
| case R_M32C_HI16: |
| relocation >>= 16; |
| break; |
| } |
| |
| #if 0 |
| printf ("relocate %s at %06lx relocation %06lx addend %ld ", |
| m32c_elf_howto_table[ELF32_R_TYPE(rel->r_info)].name, |
| rel->r_offset + input_section->output_section->vma + input_section->output_offset, |
| relocation, rel->r_addend); |
| { |
| int i; |
| for (i=0; i<4; i++) |
| printf (" %02x", contents[rel->r_offset+i]); |
| printf ("\n"); |
| } |
| #endif |
| switch (ELF32_R_TYPE(rel->r_info)) |
| { |
| case R_M32C_24: |
| /* Like m32c_apply_reloc_24, we must handle this one separately. */ |
| relocation += rel->r_addend; |
| |
| /* Sanity check the address. */ |
| if (rel->r_offset + 3 |
| > bfd_get_section_limit_octets (input_bfd, input_section)) |
| r = bfd_reloc_outofrange; |
| else |
| { |
| bfd_put_8 (input_bfd, relocation & 0xff, contents + rel->r_offset); |
| bfd_put_8 (input_bfd, (relocation >> 8) & 0xff, contents + rel->r_offset + 1); |
| bfd_put_8 (input_bfd, (relocation >> 16) & 0xff, contents + rel->r_offset + 2); |
| r = bfd_reloc_ok; |
| } |
| |
| break; |
| |
| 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 = (const char *) NULL; |
| |
| 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"); |
| break; |
| |
| case bfd_reloc_notsupported: |
| msg = _("internal error: unsupported relocation error"); |
| break; |
| |
| case bfd_reloc_dangerous: |
| msg = _("internal error: dangerous relocation"); |
| break; |
| |
| default: |
| msg = _("internal error: unknown error"); |
| break; |
| } |
| |
| if (msg) |
| (*info->callbacks->warning) (info, msg, name, input_bfd, |
| input_section, rel->r_offset); |
| } |
| } |
| |
| return true; |
| } |
| |
| /* We support 16-bit pointers to code above 64k by generating a thunk |
| below 64k containing a JMP instruction to the final address. */ |
| |
| static bool |
| m32c_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; |
| const Elf_Internal_Rela * rel; |
| const Elf_Internal_Rela * rel_end; |
| bfd_vma *local_plt_offsets; |
| asection *splt; |
| bfd *dynobj; |
| |
| if (bfd_link_relocatable (info)) |
| return true; |
| |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (abfd); |
| local_plt_offsets = elf_local_got_offsets (abfd); |
| splt = NULL; |
| dynobj = elf_hash_table(info)->dynobj; |
| |
| rel_end = relocs + sec->reloc_count; |
| for (rel = relocs; rel < rel_end; rel++) |
| { |
| struct elf_link_hash_entry *h; |
| unsigned long r_symndx; |
| bfd_vma *offset; |
| |
| r_symndx = ELF32_R_SYM (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; |
| } |
| |
| switch (ELF32_R_TYPE (rel->r_info)) |
| { |
| /* This relocation describes a 16-bit pointer to a function. |
| We may need to allocate a thunk in low memory; reserve memory |
| for it now. */ |
| case R_M32C_16: |
| if (dynobj == NULL) |
| elf_hash_table (info)->dynobj = dynobj = abfd; |
| splt = elf_hash_table (info)->splt; |
| if (splt == NULL) |
| { |
| flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS |
| | SEC_IN_MEMORY | SEC_LINKER_CREATED |
| | SEC_READONLY | SEC_CODE); |
| splt = bfd_make_section_anyway_with_flags (dynobj, ".plt", |
| flags); |
| elf_hash_table (info)->splt = splt; |
| if (splt == NULL |
| || !bfd_set_section_alignment (splt, 1)) |
| return false; |
| } |
| |
| if (h != NULL) |
| offset = &h->plt.offset; |
| else |
| { |
| if (local_plt_offsets == NULL) |
| { |
| size_t size; |
| unsigned int i; |
| |
| size = symtab_hdr->sh_info * sizeof (bfd_vma); |
| local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size); |
| if (local_plt_offsets == NULL) |
| return false; |
| elf_local_got_offsets (abfd) = local_plt_offsets; |
| |
| for (i = 0; i < symtab_hdr->sh_info; i++) |
| local_plt_offsets[i] = (bfd_vma) -1; |
| } |
| offset = &local_plt_offsets[r_symndx]; |
| } |
| |
| if (*offset == (bfd_vma) -1) |
| { |
| *offset = splt->size; |
| splt->size += 4; |
| } |
| break; |
| } |
| } |
| |
| return true; |
| } |
| |
| /* This must exist if dynobj is ever set. */ |
| |
| static bool |
| m32c_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED, |
| struct bfd_link_info *info) |
| { |
| bfd *dynobj = elf_hash_table (info)->dynobj; |
| asection *splt = elf_hash_table (info)->splt; |
| |
| /* As an extra sanity check, verify that all plt entries have |
| been filled in. */ |
| |
| if (dynobj != NULL && splt != NULL) |
| { |
| bfd_byte *contents = splt->contents; |
| unsigned int i, size = splt->size; |
| for (i = 0; i < size; i += 4) |
| { |
| unsigned int x = bfd_get_32 (dynobj, contents + i); |
| BFD_ASSERT (x != 0); |
| } |
| } |
| |
| return true; |
| } |
| |
| static bool |
| m32c_elf_early_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
| struct bfd_link_info *info) |
| { |
| bfd *dynobj; |
| asection *splt; |
| |
| if (bfd_link_relocatable (info)) |
| return true; |
| |
| dynobj = elf_hash_table (info)->dynobj; |
| if (dynobj == NULL) |
| return true; |
| |
| splt = elf_hash_table (info)->splt; |
| BFD_ASSERT (splt != NULL); |
| |
| splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size); |
| if (splt->contents == NULL) |
| return false; |
| |
| return true; |
| } |
| |
| /* Function to set the ELF flag bits. */ |
| |
| static bool |
| m32c_elf_set_private_flags (bfd *abfd, flagword flags) |
| { |
| elf_elfheader (abfd)->e_flags = flags; |
| elf_flags_init (abfd) = true; |
| return true; |
| } |
| |
| /* Merge backend specific data from an object file to the output |
| object file when linking. */ |
| |
| static bool |
| m32c_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
| { |
| bfd *obfd = info->output_bfd; |
| flagword old_flags, old_partial; |
| flagword new_flags, new_partial; |
| bool error = false; |
| char new_opt[80]; |
| char old_opt[80]; |
| |
| new_opt[0] = old_opt[0] = '\0'; |
| new_flags = elf_elfheader (ibfd)->e_flags; |
| old_flags = elf_elfheader (obfd)->e_flags; |
| |
| #ifdef DEBUG |
| _bfd_error_handler |
| ("old_flags = 0x%.8x, new_flags = 0x%.8x, init = %s, filename = %s", |
| old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no", |
| bfd_get_filename (ibfd)); |
| #endif |
| |
| if (!elf_flags_init (obfd)) |
| { |
| /* First call, no flags set. */ |
| elf_flags_init (obfd) = true; |
| elf_elfheader (obfd)->e_flags = new_flags; |
| } |
| |
| else if (new_flags == old_flags) |
| /* Compatible flags are ok. */ |
| ; |
| |
| else /* Possibly incompatible flags. */ |
| { |
| /* Warn if different cpu is used (allow a specific cpu to override |
| the generic cpu). */ |
| new_partial = (new_flags & EF_M32C_CPU_MASK); |
| old_partial = (old_flags & EF_M32C_CPU_MASK); |
| if (new_partial == old_partial) |
| ; |
| |
| else |
| { |
| switch (new_partial) |
| { |
| default: strcat (new_opt, " -m16c"); break; |
| case EF_M32C_CPU_M16C: strcat (new_opt, " -m16c"); break; |
| case EF_M32C_CPU_M32C: strcat (new_opt, " -m32c"); break; |
| } |
| |
| switch (old_partial) |
| { |
| default: strcat (old_opt, " -m16c"); break; |
| case EF_M32C_CPU_M16C: strcat (old_opt, " -m16c"); break; |
| case EF_M32C_CPU_M32C: strcat (old_opt, " -m32c"); break; |
| } |
| } |
| |
| /* Print out any mismatches from above. */ |
| if (new_opt[0]) |
| { |
| error = true; |
| _bfd_error_handler |
| /* xgettext:c-format */ |
| (_("%pB: compiled with %s and linked with modules compiled with %s"), |
| ibfd, new_opt, old_opt); |
| } |
| |
| new_flags &= ~ EF_M32C_ALL_FLAGS; |
| old_flags &= ~ EF_M32C_ALL_FLAGS; |
| |
| /* Warn about any other mismatches. */ |
| if (new_flags != old_flags) |
| { |
| error = true; |
| _bfd_error_handler |
| /* xgettext:c-format */ |
| (_("%pB: uses different e_flags (%#x) fields" |
| " than previous modules (%#x)"), |
| ibfd, new_flags, old_flags); |
| } |
| } |
| |
| if (error) |
| bfd_set_error (bfd_error_bad_value); |
| |
| return !error; |
| } |
| |
| |
| static bool |
| m32c_elf_print_private_bfd_data (bfd *abfd, void *ptr) |
| { |
| FILE *file = (FILE *) ptr; |
| flagword flags; |
| |
| BFD_ASSERT (abfd != NULL && ptr != NULL); |
| |
| /* Print normal ELF private data. */ |
| _bfd_elf_print_private_bfd_data (abfd, ptr); |
| |
| flags = elf_elfheader (abfd)->e_flags; |
| fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags); |
| |
| switch (flags & EF_M32C_CPU_MASK) |
| { |
| default: break; |
| case EF_M32C_CPU_M16C: fprintf (file, " -m16c"); break; |
| case EF_M32C_CPU_M32C: fprintf (file, " -m32c"); break; |
| } |
| |
| fputc ('\n', file); |
| return true; |
| } |
| |
| /* Return the MACH for an e_flags value. */ |
| |
| static int |
| elf32_m32c_machine (bfd *abfd) |
| { |
| switch (elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK) |
| { |
| case EF_M32C_CPU_M16C: return bfd_mach_m16c; |
| case EF_M32C_CPU_M32C: return bfd_mach_m32c; |
| } |
| |
| return bfd_mach_m16c; |
| } |
| |
| static bool |
| m32c_elf_object_p (bfd *abfd) |
| { |
| bfd_default_set_arch_mach (abfd, bfd_arch_m32c, |
| elf32_m32c_machine (abfd)); |
| return true; |
| } |
| |
| |
| #ifdef DEBUG |
| void |
| dump_symtab (bfd * abfd, void *internal_syms, void *external_syms) |
| { |
| size_t locsymcount; |
| Elf_Internal_Sym *isymbuf; |
| Elf_Internal_Sym *isymend; |
| Elf_Internal_Sym *isym; |
| Elf_Internal_Shdr *symtab_hdr; |
| bool free_internal = 0, free_external = 0; |
| char * st_info_str; |
| char * st_info_stb_str; |
| char * st_other_str; |
| char * st_shndx_str; |
| |
| if (! internal_syms) |
| { |
| internal_syms = bfd_malloc (1000); |
| free_internal = 1; |
| } |
| if (! external_syms) |
| { |
| external_syms = bfd_malloc (1000); |
| free_external = 1; |
| } |
| |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| locsymcount = symtab_hdr->sh_size / get_elf_backend_data(abfd)->s->sizeof_sym; |
| if (free_internal) |
| isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, |
| symtab_hdr->sh_info, 0, |
| internal_syms, external_syms, NULL); |
| else |
| isymbuf = internal_syms; |
| isymend = isymbuf + locsymcount; |
| |
| for (isym = isymbuf ; isym < isymend ; isym++) |
| { |
| switch (ELF_ST_TYPE (isym->st_info)) |
| { |
| case STT_FUNC: |
| st_info_str = "STT_FUNC"; |
| break; |
| |
| case STT_SECTION: |
| st_info_str = "STT_SECTION"; |
| break; |
| |
| case STT_FILE: |
| st_info_str = "STT_FILE"; |
| break; |
| |
| case STT_OBJECT: |
| st_info_str = "STT_OBJECT"; |
| break; |
| |
| case STT_TLS: |
| st_info_str = "STT_TLS"; |
| break; |
| |
| default: |
| st_info_str = ""; |
| } |
| |
| switch (ELF_ST_BIND (isym->st_info)) |
| { |
| case STB_LOCAL: |
| st_info_stb_str = "STB_LOCAL"; |
| break; |
| |
| case STB_GLOBAL: |
| st_info_stb_str = "STB_GLOBAL"; |
| break; |
| |
| default: |
| st_info_stb_str = ""; |
| } |
| |
| switch (ELF_ST_VISIBILITY (isym->st_other)) |
| { |
| case STV_DEFAULT: |
| st_other_str = "STV_DEFAULT"; |
| break; |
| |
| case STV_INTERNAL: |
| st_other_str = "STV_INTERNAL"; |
| break; |
| |
| case STV_PROTECTED: |
| st_other_str = "STV_PROTECTED"; |
| break; |
| |
| default: |
| st_other_str = ""; |
| } |
| |
| switch (isym->st_shndx) |
| { |
| case SHN_ABS: |
| st_shndx_str = "SHN_ABS"; |
| break; |
| |
| case SHN_COMMON: |
| st_shndx_str = "SHN_COMMON"; |
| break; |
| |
| case SHN_UNDEF: |
| st_shndx_str = "SHN_UNDEF"; |
| break; |
| |
| default: |
| st_shndx_str = ""; |
| } |
| |
| printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s " |
| "st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n", |
| isym, |
| (unsigned long) isym->st_value, |
| (unsigned long) isym->st_size, |
| isym->st_name, |
| bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link, |
| isym->st_name), |
| isym->st_info, st_info_str, st_info_stb_str, |
| isym->st_other, st_other_str, |
| isym->st_shndx, st_shndx_str); |
| } |
| if (free_internal) |
| free (internal_syms); |
| if (free_external) |
| free (external_syms); |
| } |
| |
| char * |
| m32c_get_reloc (long reloc) |
| { |
| if (0 <= reloc && reloc < R_M32C_max) |
| return m32c_elf_howto_table[reloc].name; |
| else |
| return ""; |
| } |
| #endif /* DEBUG */ |
| |
| /* Handle relaxing. */ |
| |
| /* A subroutine of m32c_elf_relax_section. If the global symbol H |
| is within the low 64k, remove any entry for it in the plt. */ |
| |
| struct relax_plt_data |
| { |
| asection *splt; |
| bool *again; |
| }; |
| |
| static bool |
| m32c_relax_plt_check (struct elf_link_hash_entry *h, void * xdata) |
| { |
| struct relax_plt_data *data = (struct relax_plt_data *) xdata; |
| |
| if (h->plt.offset != (bfd_vma) -1) |
| { |
| bfd_vma address; |
| |
| if (h->root.type == bfd_link_hash_undefined |
| || h->root.type == bfd_link_hash_undefweak) |
| address = 0; |
| else |
| address = (h->root.u.def.section->output_section->vma |
| + h->root.u.def.section->output_offset |
| + h->root.u.def.value); |
| |
| if (address <= 0xffff) |
| { |
| h->plt.offset = -1; |
| data->splt->size -= 4; |
| *data->again = true; |
| } |
| } |
| |
| return true; |
| } |
| |
| /* A subroutine of m32c_elf_relax_section. If the global symbol H |
| previously had a plt entry, give it a new entry offset. */ |
| |
| static bool |
| m32c_relax_plt_realloc (struct elf_link_hash_entry *h, void * xdata) |
| { |
| bfd_vma *entry = (bfd_vma *) xdata; |
| |
| if (h->plt.offset != (bfd_vma) -1) |
| { |
| h->plt.offset = *entry; |
| *entry += 4; |
| } |
| |
| return true; |
| } |
| |
| static bool |
| m32c_elf_relax_plt_section (asection *splt, |
| struct bfd_link_info *info, |
| bool *again) |
| { |
| struct relax_plt_data relax_plt_data; |
| bfd *ibfd; |
| |
| /* Assume nothing changes. */ |
| *again = false; |
| |
| if (bfd_link_relocatable (info)) |
| return true; |
| |
| /* Quick check for an empty plt. */ |
| if (splt->size == 0) |
| return true; |
| |
| /* Map across all global symbols; see which ones happen to |
| fall in the low 64k. */ |
| relax_plt_data.splt = splt; |
| relax_plt_data.again = again; |
| elf_link_hash_traverse (elf_hash_table (info), m32c_relax_plt_check, |
| &relax_plt_data); |
| |
| /* Likewise for local symbols, though that's somewhat less convenient |
| as we have to walk the list of input bfds and swap in symbol data. */ |
| for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link.next) |
| { |
| bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd); |
| Elf_Internal_Shdr *symtab_hdr; |
| Elf_Internal_Sym *isymbuf = NULL; |
| unsigned int idx; |
| |
| if (! local_plt_offsets) |
| continue; |
| |
| symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
| if (symtab_hdr->sh_info != 0) |
| { |
| isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
| if (isymbuf == NULL) |
| isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr, |
| symtab_hdr->sh_info, 0, |
| NULL, NULL, NULL); |
| if (isymbuf == NULL) |
| return false; |
| } |
| |
| for (idx = 0; idx < symtab_hdr->sh_info; ++idx) |
| { |
| Elf_Internal_Sym *isym; |
| asection *tsec; |
| bfd_vma address; |
| |
| if (local_plt_offsets[idx] == (bfd_vma) -1) |
| continue; |
| |
| isym = &isymbuf[idx]; |
| if (isym->st_shndx == SHN_UNDEF) |
| continue; |
| else if (isym->st_shndx == SHN_ABS) |
| tsec = bfd_abs_section_ptr; |
| else if (isym->st_shndx == SHN_COMMON) |
| tsec = bfd_com_section_ptr; |
| else |
| tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx); |
| |
| address = (tsec->output_section->vma |
| + tsec->output_offset |
| + isym->st_value); |
| if (address <= 0xffff) |
| { |
| local_plt_offsets[idx] = -1; |
| splt->size -= 4; |
| *again = true; |
| } |
| } |
| |
| if (isymbuf != NULL |
| && symtab_hdr->contents != (unsigned char *) isymbuf) |
| { |
| if (! info->keep_memory) |
| free (isymbuf); |
| else |
| { |
| /* Cache the symbols for elf_link_input_bfd. */ |
| symtab_hdr->contents = (unsigned char *) isymbuf; |
| } |
| } |
| } |
| |
| /* If we changed anything, walk the symbols again to reallocate |
| .plt entry addresses. */ |
| if (*again && splt->size > 0) |
| { |
| bfd_vma entry = 0; |
| |
| elf_link_hash_traverse (elf_hash_table (info), |
| m32c_relax_plt_realloc, &entry); |
| |
| for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link.next) |
| { |
| bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd); |
| unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info; |
| unsigned int idx; |
| |
| if (! local_plt_offsets) |
| continue; |
| |
| for (idx = 0; idx < nlocals; ++idx) |
| if (local_plt_offsets[idx] != (bfd_vma) -1) |
| { |
| local_plt_offsets[idx] = entry; |
| entry += 4; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| static int |
| compare_reloc (const void *e1, const void *e2) |
| { |
| const Elf_Internal_Rela *i1 = (const Elf_Internal_Rela *) e1; |
| const Elf_Internal_Rela *i2 = (const Elf_Internal_Rela *) e2; |
| |
| if (i1->r_offset == i2->r_offset) |
| return 0; |
| else |
| return i1->r_offset < i2->r_offset ? -1 : 1; |
| } |
| |
| #define OFFSET_FOR_RELOC(rel) m32c_offset_for_reloc (abfd, rel, symtab_hdr, shndx_buf, intsyms) |
| static bfd_vma |
| m32c_offset_for_reloc (bfd *abfd, |
| Elf_Internal_Rela *rel, |
| Elf_Internal_Shdr *symtab_hdr, |
| bfd_byte *shndx_buf ATTRIBUTE_UNUSED, |
| Elf_Internal_Sym *intsyms) |
| { |
| bfd_vma symval; |
| |
| /* Get the value of the symbol referred to by the reloc. */ |
| if (ELF32_R_SYM (rel->r_info) < symtab_hdr->sh_info) |
| { |
| /* A local symbol. */ |
| Elf_Internal_Sym *isym; |
| asection *ssec; |
| |
| isym = intsyms + ELF32_R_SYM (rel->r_info); |
| ssec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
| symval = isym->st_value; |
| if (ssec) |
| symval += ssec->output_section->vma |
| + ssec->output_offset; |
| } |
| else |
| { |
| unsigned long indx; |
| struct elf_link_hash_entry *h; |
| |
| /* An external symbol. */ |
| indx = ELF32_R_SYM (rel->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. */ |
| return 0; |
| |
| symval = (h->root.u.def.value |
| + h->root.u.def.section->output_section->vma |
| + h->root.u.def.section->output_offset); |
| } |
| return symval; |
| } |
| |
| static int bytes_saved = 0; |
| |
| static int bytes_to_reloc[] = { |
| R_M32C_NONE, |
| R_M32C_8, |
| R_M32C_16, |
| R_M32C_24, |
| R_M32C_32 |
| }; |
| |
| /* What we use the bits in a relax reloc addend (R_M32C_RL_*) for. */ |
| |
| /* Mask for the number of relocs associated with this insn. */ |
| #define RLA_RELOCS 0x0000000f |
| /* Number of bytes gas emitted (before gas's relaxing) */ |
| #define RLA_NBYTES 0x00000ff0 |
| |
| /* If the displacement is within the given range and the new encoding |
| differs from the old encoding (the index), then the insn can be |
| relaxed to the new encoding. */ |
| typedef const struct { |
| int bytes; |
| unsigned int max_disp; |
| unsigned char new_encoding; |
| } EncodingTable; |
| |
| static EncodingTable m16c_addr_encodings[] = { |
| { 0, 0, 0 }, /* R0 */ |
| { 0, 0, 1 }, /* R1 */ |
| { 0, 0, 2 }, /* R2 */ |
| { 0, 0, 3 }, /* R3 */ |
| { 0, 0, 4 }, /* A0 */ |
| { 0, 0, 5 }, /* A1 */ |
| { 0, 0, 6 }, /* [A0] */ |
| { 0, 0, 7 }, /* [A1] */ |
| { 1, 0, 6 }, /* udsp:8[A0] */ |
| { 1, 0, 7 }, /* udsp:8[A1] */ |
| { 1, 0, 10 }, /* udsp:8[SB] */ |
| { 1, 0, 11 }, /* sdsp:8[FB] */ |
| { 2, 255, 8 }, /* udsp:16[A0] */ |
| { 2, 255, 9 }, /* udsp:16[A1] */ |
| { 2, 255, 10 }, /* udsp:16[SB] */ |
| { 2, 0, 15 }, /* abs:16 */ |
| }; |
| |
| static EncodingTable m16c_jmpaddr_encodings[] = { |
| { 0, 0, 0 }, /* R0 */ |
| { 0, 0, 1 }, /* R1 */ |
| { 0, 0, 2 }, /* R2 */ |
| { 0, 0, 3 }, /* R3 */ |
| { 0, 0, 4 }, /* A0 */ |
| { 0, 0, 5 }, /* A1 */ |
| { 0, 0, 6 }, /* [A0] */ |
| { 0, 0, 7 }, /* [A1] */ |
| { 1, 0, 6 }, /* udsp:8[A0] */ |
| { 1, 0, 7 }, /* udsp:8[A1] */ |
| { 1, 0, 10 }, /* udsp:8[SB] */ |
| { 1, 0, 11 }, /* sdsp:8[FB] */ |
| { 3, 255, 8 }, /* udsp:20[A0] */ |
| { 3, 255, 9 }, /* udsp:20[A1] */ |
| { 2, 255, 10 }, /* udsp:16[SB] */ |
| { 2, 0, 15 }, /* abs:16 */ |
| }; |
| |
| static EncodingTable m32c_addr_encodings[] = { |
| { 0, 0, 0 }, /* [A0] */ |
| { 0, 0, 1 }, /* [A1] */ |
| { 0, 0, 2 }, /* A0 */ |
| { 0, 0, 3 }, /* A1 */ |
| { 1, 0, 0 }, /* udsp:8[A0] */ |
| { 1, 0, 1 }, /* udsp:8[A1] */ |
| { 1, 0, 6 }, /* udsp:8[SB] */ |
| { 1, 0, 7 }, /* sdsp:8[FB] */ |
| { 2, 255, 4 }, /* udsp:16[A0] */ |
| { 2, 255, 5 }, /* udsp:16[A1] */ |
| { 2, 255, 6 }, /* udsp:16[SB] */ |
| { 2, 127, 7 }, /* sdsp:16[FB] */ |
| { 3, 65535, 8 }, /* udsp:24[A0] */ |
| { 3, 65535, 9 }, /* udsp:24[A1] */ |
| { 3, 65535, 15 }, /* abs24 */ |
| { 2, 0, 15 }, /* abs16 */ |
| { 0, 0, 16 }, /* R2 */ |
| { 0, 0, 17 }, /* R3 */ |
| { 0, 0, 18 }, /* R0 */ |
| { 0, 0, 19 }, /* R1 */ |
| { 0, 0, 20 }, /* */ |
| { 0, 0, 21 }, /* */ |
| { 0, 0, 22 }, /* */ |
| { 0, 0, 23 }, /* */ |
| { 0, 0, 24 }, /* */ |
| { 0, 0, 25 }, /* */ |
| { 0, 0, 26 }, /* */ |
| { 0, 0, 27 }, /* */ |
| { 0, 0, 28 }, /* */ |
| { 0, 0, 29 }, /* */ |
| { 0, 0, 30 }, /* */ |
| { 0, 0, 31 }, /* */ |
| }; |
| |
| static bool |
| m32c_elf_relax_section (bfd *abfd, |
| asection *sec, |
| struct bfd_link_info *link_info, |
| bool *again) |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| Elf_Internal_Shdr *shndx_hdr; |
| Elf_Internal_Rela *internal_relocs; |
| Elf_Internal_Rela *free_relocs = NULL; |
| Elf_Internal_Rela *irel, *irelend, *srel; |
| bfd_byte * contents = NULL; |
| bfd_byte * free_contents = NULL; |
| Elf_Internal_Sym *intsyms = NULL; |
| Elf_Internal_Sym *free_intsyms = NULL; |
| bfd_byte *shndx_buf = NULL; |
| int machine; |
| |
| if (is_elf_hash_table (link_info->hash) |
| && abfd == elf_hash_table (link_info)->dynobj |
| && (sec->flags & SEC_LINKER_CREATED) != 0 |
| && strcmp (sec->name, ".plt") == 0) |
| return m32c_elf_relax_plt_section (sec, link_info, again); |
| |
| /* Assume nothing changes. */ |
| *again = false; |
| |
| machine = elf32_m32c_machine (abfd); |
| |
| /* 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_symtab_hdr (abfd); |
| if (elf_symtab_shndx_list (abfd)) |
| shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; |
| else |
| shndx_hdr = NULL; |
| |
| /* Get the section contents. */ |
| 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 symbols. */ |
| /* Get cached copy if it exists. */ |
| if (symtab_hdr->contents != NULL) |
| { |
| intsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| } |
| else |
| { |
| intsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, symtab_hdr->sh_info, 0, NULL, NULL, NULL); |
| symtab_hdr->contents = (bfd_byte *) intsyms; |
| } |
| |
| if (shndx_hdr && shndx_hdr->sh_size != 0) |
| { |
| size_t amt; |
| |
| if (_bfd_mul_overflow (symtab_hdr->sh_info, |
| sizeof (Elf_External_Sym_Shndx), &amt)) |
| { |
| bfd_set_error (bfd_error_file_too_big); |
| goto error_return; |
| } |
| if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0) |
| goto error_return; |
| shndx_buf = _bfd_malloc_and_read (abfd, amt, amt); |
| if (shndx_buf == NULL) |
| goto error_return; |
| shndx_hdr->contents = shndx_buf; |
| } |
| |
| /* 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; |
| if (! link_info->keep_memory) |
| free_relocs = internal_relocs; |
| |
| /* The RL_ relocs must be just before the operand relocs they go |
| with, so we must sort them to guarantee this. */ |
| qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), |
| compare_reloc); |
| |
| /* Walk through them looking for relaxing opportunities. */ |
| irelend = internal_relocs + sec->reloc_count; |
| |
| for (irel = internal_relocs; irel < irelend; irel++) |
| { |
| bfd_vma symval; |
| unsigned char *insn, *gap, *einsn; |
| bfd_vma pc; |
| bfd_signed_vma pcrel; |
| int relax_relocs; |
| int gap_size; |
| int new_type; |
| int posn; |
| int enc; |
| EncodingTable *enctbl; |
| EncodingTable *e; |
| |
| if (ELF32_R_TYPE(irel->r_info) != R_M32C_RL_JUMP |
| && ELF32_R_TYPE(irel->r_info) != R_M32C_RL_1ADDR |
| && ELF32_R_TYPE(irel->r_info) != R_M32C_RL_2ADDR) |
| continue; |
| |
| srel = irel; |
| |
| /* There will always be room for the relaxed insn, since it is smaller |
| than the one it would replace. */ |
| BFD_ASSERT (irel->r_offset < sec->size); |
| |
| insn = contents + irel->r_offset; |
| relax_relocs = irel->r_addend % 16; |
| |
| /* Ok, we only have three relocs we care about, and they're all |
| fake. The lower four bits of the addend is always the number |
| of following relocs (hence the qsort above) that are assigned |
| to this opcode. The next 8 bits of the addend indicates the |
| number of bytes in the insn. We use the rest of them |
| ourselves as flags for the more expensive operations (defines |
| above). The three relocs are: |
| |
| RL_JUMP: This marks all direct jump insns. We check the |
| displacement and replace them with shorter jumps if |
| they're in range. We also use this to find JMP.S |
| insns and manually shorten them when we delete bytes. |
| We have to decode these insns to figure out what to |
| do. |
| |
| RL_1ADDR: This is a :G or :Q insn, which has a single |
| "standard" operand. We have to extract the type |
| field, see if it's a wide displacement, then figure |
| out if we can replace it with a narrow displacement. |
| We don't have to decode these insns. |
| |
| RL_2ADDR: Similarly, but two "standard" operands. Note that |
| r_addend may still be 1, as standard operands don't |
| always have displacements. Gas shouldn't give us one |
| with zero operands, but since we don't know which one |
| has the displacement, we check them both anyway. |
| |
| These all point to the beginning of the insn itself, not the |
| operands. |
| |
| Note that we only relax one step at a time, relying on the |
| linker to call us repeatedly. Thus, there is no code for |
| JMP.A->JMP.B although that will happen in two steps. |
| Likewise, for 2ADDR relaxes, we do one operand per cycle. |
| */ |
| |
| /* Get the value of the symbol referred to by the reloc. Just |
| in case this is the last reloc in the list, use the RL's |
| addend to choose between this reloc (no addend) or the next |
| (yes addend, which means at least one following reloc). */ |
| srel = irel + (relax_relocs ? 1 : 0); |
| symval = OFFSET_FOR_RELOC (srel); |
| |
| /* Setting gap_size nonzero is the flag which means "something |
| shrunk". */ |
| gap_size = 0; |
| gap = NULL; |
| new_type = ELF32_R_TYPE(srel->r_info); |
| |
| pc = sec->output_section->vma + sec->output_offset |
| + srel->r_offset; |
| pcrel = symval - pc + srel->r_addend; |
| |
| if (machine == bfd_mach_m16c) |
| { |
| /* R8C / M16C */ |
| |
| switch (ELF32_R_TYPE(irel->r_info)) |
| { |
| |
| case R_M32C_RL_JUMP: |
| switch (insn[0]) |
| { |
| case 0xfe: /* jmp.b */ |
| if (pcrel >= 2 && pcrel <= 9) |
| { |
| /* Relax JMP.B -> JMP.S. We need to get rid of |
| the following reloc though. */ |
| insn[0] = 0x60 | (pcrel - 2); |
| new_type = R_M32C_NONE; |
| irel->r_addend = 0x10; |
| gap_size = 1; |
| gap = insn + 1; |
| } |
| break; |
| |
| case 0xf4: /* jmp.w */ |
| /* 128 is allowed because it will be one byte closer |
| after relaxing. Likewise for all other pc-rel |
| jumps. */ |
| if (pcrel <= 128 && pcrel >= -128) |
| { |
| /* Relax JMP.W -> JMP.B */ |
| insn[0] = 0xfe; |
| insn[1] = 0; |
| new_type = R_M32C_8_PCREL; |
| gap_size = 1; |
| gap = insn + 2; |
| } |
| break; |
| |
| case 0xfc: /* jmp.a */ |
| if (pcrel <= 32768 && pcrel >= -32768) |
| { |
| /* Relax JMP.A -> JMP.W */ |
| insn[0] = 0xf4; |
| insn[1] = 0; |
| insn[2] = 0; |
| new_type = R_M32C_16_PCREL; |
| gap_size = 1; |
| gap = insn + 3; |
| } |
| break; |
| |
| case 0xfd: /* jsr.a */ |
| if (pcrel <= 32768 && pcrel >= -32768) |
| { |
| /* Relax JSR.A -> JSR.W */ |
| insn[0] = 0xf5; |
| insn[1] = 0; |
| insn[2] = 0; |
| new_type = R_M32C_16_PCREL; |
| gap_size = 1; |
| gap = insn + 3; |
| } |
| break; |
| } |
| break; |
| |
| case R_M32C_RL_2ADDR: |
| /* xxxx xxxx srce dest [src-disp] [dest-disp]*/ |
| |
| enctbl = m16c_addr_encodings; |
| posn = 2; |
| enc = (insn[1] >> 4) & 0x0f; |
| e = & enctbl[enc]; |
| |
| if (srel->r_offset == irel->r_offset + posn |
| && e->new_encoding != enc |
| && symval <= e->max_disp) |
| { |
| insn[1] &= 0x0f; |
| insn[1] |= e->new_encoding << 4; |
| gap_size = e->bytes - enctbl[e->new_encoding].bytes; |
| gap = insn + posn + enctbl[e->new_encoding].bytes; |
| new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes]; |
| break; |
| } |
| if (relax_relocs == 2) |
| srel ++; |
| posn += e->bytes; |
| |
| goto try_1addr_16; |
| |
| case R_M32C_RL_1ADDR: |
| /* xxxx xxxx xxxx dest [disp] */ |
| |
| enctbl = m16c_addr_encodings; |
| posn = 2; |
| |
| /* Check the opcode for jumps. We know it's safe to |
| do this because all 2ADDR insns are at least two |
| bytes long. */ |
| enc = insn[0] * 256 + insn[1]; |
| enc &= 0xfff0; |
| if (enc == 0x7d20 |
| || enc == 0x7d00 |
| || enc == 0x7d30 |
| || enc == 0x7d10) |
| { |
| enctbl = m16c_jmpaddr_encodings; |
| } |
| |
| try_1addr_16: |
| /* srel, posn, and enc must be set here. */ |
| |
| symval = OFFSET_FOR_RELOC (srel); |
| enc = insn[1] & 0x0f; |
| e = & enctbl[enc]; |
| |
| if (srel->r_offset == irel->r_offset + posn |
| && e->new_encoding != enc |
| && symval <= e->max_disp) |
| { |
| insn[1] &= 0xf0; |
| insn[1] |= e->new_encoding; |
| gap_size = e->bytes - enctbl[e->new_encoding].bytes; |
| gap = insn + posn + enctbl[e->new_encoding].bytes; |
| new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes]; |
| break; |
| } |
| |
| break; |
| |
| } /* Ends switch (reloc type) for m16c. */ |
| } |
| else /* machine == bfd_mach_m32c */ |
| { |
| /* M32CM / M32C */ |
| |
| switch (ELF32_R_TYPE(irel->r_info)) |
| { |
| |
| case R_M32C_RL_JUMP: |
| switch (insn[0]) |
| { |
| case 0xbb: /* jmp.b */ |
| if (pcrel >= 2 && pcrel <= 9) |
| { |
| int p = pcrel - 2; |
| /* Relax JMP.B -> JMP.S. We need to get rid of |
| the following reloc though. */ |
| insn[0] = 0x4a | ((p << 3) & 0x30) | (p & 1); |
| new_type = R_M32C_NONE; |
| irel->r_addend = 0x10; |
| gap_size = 1; |
| gap = insn + 1; |
| } |
| break; |
| |
| case 0xce: /* jmp.w */ |
| if (pcrel <= 128 && pcrel >= -128) |
| { |
| /* Relax JMP.W -> JMP.B */ |
| insn[0] = 0xbb; |
| insn[1] = 0; |
| new_type = R_M32C_8_PCREL; |
| gap_size = 1; |
| gap = insn + 2; |
| } |
| break; |
| |
| case 0xcc: /* jmp.a */ |
| if (pcrel <= 32768 && pcrel >= -32768) |
| { |
| /* Relax JMP.A -> JMP.W */ |
| insn[0] = 0xce; |
| insn[1] = 0; |
| insn[2] = 0; |
| new_type = R_M32C_16_PCREL; |
| gap_size = 1; |
| gap = insn + 3; |
| } |
| break; |
| |
| case 0xcd: /* jsr.a */ |
| if (pcrel <= 32768 && pcrel >= -32768) |
| { |
| /* Relax JSR.A -> JSR.W */ |
| insn[0] = 0xcf; |
| insn[1] = 0; |
| insn[2] = 0; |
| new_type = R_M32C_16_PCREL; |
| gap_size = 1; |
| gap = insn + 3; |
| } |
| break; |
| } |
| break; |
| |
| case R_M32C_RL_2ADDR: |
| /* xSSS DDDx DDSS xxxx [src-disp] [dest-disp]*/ |
| |
| einsn = insn; |
| posn = 2; |
| if (einsn[0] == 1) |
| { |
| /* prefix; remove it as far as the RL reloc is concerned. */ |
| einsn ++; |
| posn ++; |
| } |
| |
| enctbl = m32c_addr_encodings; |
| enc = ((einsn[0] & 0x70) >> 2) | ((einsn[1] & 0x30) >> 4); |
| e = & enctbl[enc]; |
| |
| if (srel->r_offset == irel->r_offset + posn |
| && e->new_encoding != enc |
| && symval <= e->max_disp) |
| { |
| einsn[0] &= 0x8f; |
| einsn[0] |= (e->new_encoding & 0x1c) << 2; |
| einsn[1] &= 0xcf; |
| einsn[1] |= (e->new_encoding & 0x03) << 4; |
| gap_size = e->bytes - enctbl[e->new_encoding].bytes; |
| gap = insn + posn + enctbl[e->new_encoding].bytes; |
| new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes]; |
| break; |
| } |
| if (relax_relocs == 2) |
| srel ++; |
| posn += e->bytes; |
| |
| goto try_1addr_32; |
| |
| case R_M32C_RL_1ADDR: |
| /* xxxx DDDx DDxx xxxx [disp] */ |
| |
| einsn = insn; |
| posn = 2; |
| if (einsn[0] == 1) |
| { |
| /* prefix; remove it as far as the RL reloc is concerned. */ |
| einsn ++; |
| posn ++; |
| } |
| |
| enctbl = m32c_addr_encodings; |
| |
| try_1addr_32: |
| /* srel, posn, and enc must be set here. */ |
| |
| symval = OFFSET_FOR_RELOC (srel); |
| enc = ((einsn[0] & 0x0e) << 1) | ((einsn[1] & 0xc0) >> 6); |
| e = & enctbl[enc]; |
| |
| if (srel->r_offset == irel->r_offset + posn |
| && e->new_encoding != enc |
| && symval <= e->max_disp) |
| { |
| einsn[0] &= 0xf1; |
| einsn[0] |= (e->new_encoding & 0x1c) >> 1; |
| einsn[1] &= 0x3f; |
| einsn[1] |= (e->new_encoding & 0x03) << 6; |
| gap_size = e->bytes - enctbl[e->new_encoding].bytes; |
| gap = insn + posn + enctbl[e->new_encoding].bytes; |
| new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes]; |
| break; |
| } |
| |
| break; |
| |
| } /* Ends switch (reloc type) for m32c. */ |
| } |
| |
| if (gap_size == 0) |
| continue; |
| |
| *again = true; |
| |
| srel->r_info = ELF32_R_INFO (ELF32_R_SYM (srel->r_info), new_type); |
| |
| /* Note that we've changed the relocs, section contents, etc. */ |
| elf_section_data (sec)->relocs = internal_relocs; |
| free_relocs = NULL; |
| |
| elf_section_data (sec)->this_hdr.contents = contents; |
| free_contents = NULL; |
| |
| symtab_hdr->contents = (bfd_byte *) intsyms; |
| free_intsyms = NULL; |
| |
| bytes_saved += gap_size; |
| |
| if (! m32c_elf_relax_delete_bytes(abfd, sec, gap - contents, gap_size)) |
| goto error_return; |
| |
| } /* next relocation */ |
| |
| free (free_relocs); |
| free_relocs = NULL; |
| |
| if (free_contents != NULL) |
| { |
| if (! link_info->keep_memory) |
| free (free_contents); |
| /* Cache the section contents for elf_link_input_bfd. */ |
| else |
| elf_section_data (sec)->this_hdr.contents = contents; |
| |
| free_contents = NULL; |
| } |
| |
| if (shndx_buf != NULL) |
| { |
| shndx_hdr->contents = NULL; |
| free (shndx_buf); |
| } |
| |
| if (free_intsyms != NULL) |
| { |
| if (! link_info->keep_memory) |
| free (free_intsyms); |
| /* Cache the symbols for elf_link_input_bfd. */ |
| else |
| { |
| symtab_hdr->contents = NULL /* (unsigned char *) intsyms*/; |
| } |
| |
| free_intsyms = NULL; |
| } |
| |
| return true; |
| |
| error_return: |
| free (free_relocs); |
| free (free_contents); |
| if (shndx_buf != NULL) |
| { |
| shndx_hdr->contents = NULL; |
| free (shndx_buf); |
| } |
| free (free_intsyms); |
| return false; |
| } |
| |
| /* Delete some bytes from a section while relaxing. */ |
| |
| static bool |
| m32c_elf_relax_delete_bytes (bfd *abfd, |
| asection *sec, |
| bfd_vma addr, |
| int count) |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| Elf_Internal_Shdr *shndx_hdr; |
| int sec_shndx; |
| bfd_byte *contents; |
| Elf_Internal_Rela *irel; |
| Elf_Internal_Rela *irelend; |
| bfd_vma toaddr; |
| Elf_Internal_Sym *isym; |
| Elf_Internal_Sym *isymend; |
| Elf_Internal_Sym *intsyms; |
| Elf_External_Sym_Shndx *shndx_buf; |
| Elf_External_Sym_Shndx *shndx; |
| struct elf_link_hash_entry ** sym_hashes; |
| struct elf_link_hash_entry ** end_hashes; |
| unsigned int symcount; |
| |
| 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; |
| |
| if (ELF32_R_TYPE(irel->r_info) == R_M32C_RL_JUMP |
| && irel->r_addend == 0x10 /* one byte insn, no relocs */ |
| && irel->r_offset + 1 < addr |
| && irel->r_offset + 7 > addr) |
| { |
| bfd_vma disp; |
| unsigned char *insn = &contents[irel->r_offset]; |
| disp = *insn; |
| /* This is a JMP.S, which we have to manually update. */ |
| if (elf32_m32c_machine (abfd) == bfd_mach_m16c) |
| { |
| if ((*insn & 0xf8) != 0x60) |
| continue; |
| disp = (disp & 7); |
| } |
| else |
| { |
| if ((*insn & 0xce) != 0x4a) |
| continue; |
| disp = ((disp & 0x30) >> 3) | (disp & 1); |
| } |
| if (irel->r_offset + disp + 2 >= addr+count) |
| { |
| disp -= count; |
| if (elf32_m32c_machine (abfd) == bfd_mach_m16c) |
| { |
| *insn = (*insn & 0xf8) | disp; |
| } |
| else |
| { |
| *insn = (*insn & 0xce) | ((disp & 6) << 3) | (disp & 1); |
| } |
| } |
| } |
| } |
| |
| /* Adjust the local symbols defined in this section. */ |
| symtab_hdr = & elf_tdata (abfd)->symtab_hdr; |
| intsyms = (Elf_Internal_Sym *) symtab_hdr->contents; |
| isym = intsyms; |
| isymend = isym + symtab_hdr->sh_info; |
| |
| sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); |
| if (elf_symtab_shndx_list (abfd)) |
| { |
| shndx_hdr = & elf_symtab_shndx_list (abfd)->hdr; |
| shndx_buf = (Elf_External_Sym_Shndx *) shndx_hdr->contents; |
| } |
| else |
| { |
| shndx_hdr = NULL; |
| shndx_buf = NULL; |
| } |
| shndx = shndx_buf; |
| |
| for (; isym < isymend; isym++, shndx = (shndx ? shndx + 1 : NULL)) |
| { |
| /* If the symbol is in the range of memory we just moved, we |
| have to adjust its value. */ |
| if ((int) isym->st_shndx == sec_shndx |
| && isym->st_value > addr |
| && isym->st_value < toaddr) |
| { |
| isym->st_value -= count; |
| } |
| /* If the symbol *spans* the bytes we just deleted (i.e. it's |
| *end* is in the moved bytes but it's *start* isn't), then we |
| must adjust its size. */ |
| if ((int) isym->st_shndx == sec_shndx |
| && isym->st_value < addr |
| && isym->st_value + isym->st_size > addr |
| && isym->st_value + isym->st_size < toaddr) |
| { |
| isym->st_size -= 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 = 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; |
| |
| if (sym_hash && |
| (sym_hash->root.type == bfd_link_hash_defined |
| || sym_hash->root.type == bfd_link_hash_defweak) |
| && sym_hash->root.u.def.section == sec) |
| { |
| if (sym_hash->root.u.def.value > addr |
| && sym_hash->root.u.def.value < toaddr) |
| { |
| sym_hash->root.u.def.value -= count; |
| } |
| if (sym_hash->root.u.def.value < addr |
| && sym_hash->root.u.def.value + sym_hash->size > addr |
| && sym_hash->root.u.def.value + sym_hash->size < toaddr) |
| { |
| sym_hash->size -= count; |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| /* This is for versions of gcc prior to 4.3. */ |
| static unsigned int |
| _bfd_m32c_elf_eh_frame_address_size (bfd *abfd, |
| const asection *sec ATTRIBUTE_UNUSED) |
| { |
| if ((elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK) == EF_M32C_CPU_M16C) |
| return 2; |
| return 4; |
| } |
| |
| |
| |
| #define ELF_ARCH bfd_arch_m32c |
| #define ELF_MACHINE_CODE EM_M32C |
| #define ELF_MACHINE_ALT1 EM_M32C_OLD |
| #define ELF_MAXPAGESIZE 0x100 |
| |
| #if 0 |
| #define TARGET_BIG_SYM m32c_elf32_vec |
| #define TARGET_BIG_NAME "elf32-m32c" |
| #else |
| #define TARGET_LITTLE_SYM m32c_elf32_vec |
| #define TARGET_LITTLE_NAME "elf32-m32c" |
| #endif |
| |
| #define elf_info_to_howto_rel NULL |
| #define elf_info_to_howto m32c_info_to_howto_rela |
| #define elf_backend_object_p m32c_elf_object_p |
| #define elf_backend_relocate_section m32c_elf_relocate_section |
| #define elf_backend_check_relocs m32c_elf_check_relocs |
| #define elf_backend_object_p m32c_elf_object_p |
| #define elf_symbol_leading_char ('_') |
| #define elf_backend_early_size_sections \ |
| m32c_elf_early_size_sections |
| #define elf_backend_finish_dynamic_sections \ |
| m32c_elf_finish_dynamic_sections |
| |
| #define elf_backend_can_gc_sections 1 |
| #define elf_backend_eh_frame_address_size _bfd_m32c_elf_eh_frame_address_size |
| |
| #define bfd_elf32_bfd_reloc_type_lookup m32c_reloc_type_lookup |
| #define bfd_elf32_bfd_reloc_name_lookup m32c_reloc_name_lookup |
| #define bfd_elf32_bfd_relax_section m32c_elf_relax_section |
| #define bfd_elf32_bfd_set_private_flags m32c_elf_set_private_flags |
| #define bfd_elf32_bfd_merge_private_bfd_data m32c_elf_merge_private_bfd_data |
| #define bfd_elf32_bfd_print_private_bfd_data m32c_elf_print_private_bfd_data |
| |
| #include "elf32-target.h" |