| /* D10V-specific support for 32-bit ELF |
| Copyright 1996, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
| Contributed by Martin Hunt (hunt@cygnus.com). |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| #include "bfd.h" |
| #include "sysdep.h" |
| #include "libbfd.h" |
| #include "elf-bfd.h" |
| #include "elf/d10v.h" |
| |
| static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup |
| PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); |
| static void d10v_info_to_howto_rel |
| PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *)); |
| static asection * elf32_d10v_gc_mark_hook |
| PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
| struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
| static boolean elf32_d10v_gc_sweep_hook |
| PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| const Elf_Internal_Rela *)); |
| static boolean elf32_d10v_check_relocs |
| PARAMS ((bfd *, struct bfd_link_info *, asection *, |
| const Elf_Internal_Rela *)); |
| static boolean elf32_d10v_relocate_section |
| PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, |
| bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, |
| asection **)); |
| |
| /* Use REL instead of RELA to save space. */ |
| #define USE_REL |
| |
| static reloc_howto_type elf_d10v_howto_table[] = |
| { |
| /* This reloc does nothing. */ |
| HOWTO (R_D10V_NONE, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_D10V_NONE", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* An PC Relative 10-bit relocation, shifted by 2 */ |
| /* right container */ |
| HOWTO (R_D10V_10_PCREL_R, /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 7, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_D10V_10_PCREL_R", /* name */ |
| false, /* partial_inplace */ |
| 0xff, /* src_mask */ |
| 0xff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* An PC Relative 10-bit relocation, shifted by 2 */ |
| /* left container */ |
| HOWTO (R_D10V_10_PCREL_L, /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 7, /* bitsize */ |
| true, /* pc_relative */ |
| 15, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_D10V_10_PCREL_L", /* name */ |
| false, /* partial_inplace */ |
| 0x07f8000, /* src_mask */ |
| 0x07f8000, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* A 16 bit absolute relocation */ |
| HOWTO (R_D10V_16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_D10V_16", /* name */ |
| false, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* An 18 bit absolute relocation, right shifted 2 */ |
| HOWTO (R_D10V_18, /* type */ |
| 2, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_D10V_18", /* name */ |
| false, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* A relative 18 bit relocation, right shifted by 2 */ |
| HOWTO (R_D10V_18_PCREL, /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 15, /* bitsize */ |
| true, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_D10V_18_PCREL", /* name */ |
| false, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| true), /* pcrel_offset */ |
| |
| /* A 32 bit absolute relocation */ |
| HOWTO (R_D10V_32, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| bfd_elf_generic_reloc, /* special_function */ |
| "R_D10V_32", /* name */ |
| false, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* GNU extension to record C++ vtable hierarchy */ |
| HOWTO (R_D10V_GNU_VTINHERIT, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| NULL, /* special_function */ |
| "R_D10V_GNU_VTINHERIT", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| |
| /* GNU extension to record C++ vtable member usage */ |
| HOWTO (R_D10V_GNU_VTENTRY, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| false, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| _bfd_elf_rel_vtable_reloc_fn, /* special_function */ |
| "R_D10V_GNU_VTENTRY", /* name */ |
| false, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| false), /* pcrel_offset */ |
| }; |
| |
| /* Map BFD reloc types to D10V ELF reloc types. */ |
| |
| struct d10v_reloc_map |
| { |
| bfd_reloc_code_real_type bfd_reloc_val; |
| unsigned char elf_reloc_val; |
| }; |
| |
| static const struct d10v_reloc_map d10v_reloc_map[] = |
| { |
| { BFD_RELOC_NONE, R_D10V_NONE, }, |
| { BFD_RELOC_D10V_10_PCREL_R, R_D10V_10_PCREL_R }, |
| { BFD_RELOC_D10V_10_PCREL_L, R_D10V_10_PCREL_L }, |
| { BFD_RELOC_16, R_D10V_16 }, |
| { BFD_RELOC_D10V_18, R_D10V_18 }, |
| { BFD_RELOC_D10V_18_PCREL, R_D10V_18_PCREL }, |
| { BFD_RELOC_32, R_D10V_32 }, |
| { BFD_RELOC_VTABLE_INHERIT, R_D10V_GNU_VTINHERIT }, |
| { BFD_RELOC_VTABLE_ENTRY, R_D10V_GNU_VTENTRY }, |
| }; |
| |
| static reloc_howto_type * |
| bfd_elf32_bfd_reloc_type_lookup (abfd, code) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| bfd_reloc_code_real_type code; |
| { |
| unsigned int i; |
| |
| for (i = 0; |
| i < sizeof (d10v_reloc_map) / sizeof (struct d10v_reloc_map); |
| i++) |
| { |
| if (d10v_reloc_map[i].bfd_reloc_val == code) |
| return &elf_d10v_howto_table[d10v_reloc_map[i].elf_reloc_val]; |
| } |
| |
| return NULL; |
| } |
| |
| /* Set the howto pointer for an D10V ELF reloc. */ |
| |
| static void |
| d10v_info_to_howto_rel (abfd, cache_ptr, dst) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| arelent *cache_ptr; |
| Elf32_Internal_Rel *dst; |
| { |
| unsigned int r_type; |
| |
| r_type = ELF32_R_TYPE (dst->r_info); |
| BFD_ASSERT (r_type < (unsigned int) R_D10V_max); |
| cache_ptr->howto = &elf_d10v_howto_table[r_type]; |
| } |
| |
| static asection * |
| elf32_d10v_gc_mark_hook (sec, info, rel, h, sym) |
| asection *sec; |
| struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| Elf_Internal_Rela *rel; |
| struct elf_link_hash_entry *h; |
| Elf_Internal_Sym *sym; |
| { |
| if (h != NULL) |
| { |
| switch (ELF32_R_TYPE (rel->r_info)) |
| { |
| case R_D10V_GNU_VTINHERIT: |
| case R_D10V_GNU_VTENTRY: |
| break; |
| |
| default: |
| switch (h->root.type) |
| { |
| case bfd_link_hash_defined: |
| case bfd_link_hash_defweak: |
| return h->root.u.def.section; |
| |
| case bfd_link_hash_common: |
| return h->root.u.c.p->section; |
| |
| default: |
| break; |
| } |
| } |
| } |
| else |
| return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
| |
| return NULL; |
| } |
| |
| static boolean |
| elf32_d10v_gc_sweep_hook (abfd, info, sec, relocs) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| asection *sec ATTRIBUTE_UNUSED; |
| const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; |
| { |
| /* we don't use got and plt entries for d10v */ |
| return true; |
| } |
| |
| /* Look through the relocs for a section during the first phase. |
| Since we don't do .gots or .plts, we just need to consider the |
| virtual table relocs for gc. */ |
| |
| static boolean |
| elf32_d10v_check_relocs (abfd, info, sec, relocs) |
| bfd *abfd; |
| struct bfd_link_info *info; |
| asection *sec; |
| const Elf_Internal_Rela *relocs; |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; |
| const Elf_Internal_Rela *rel; |
| const Elf_Internal_Rela *rel_end; |
| |
| if (info->relocateable) |
| return true; |
| |
| symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
| sym_hashes = elf_sym_hashes (abfd); |
| sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym); |
| if (!elf_bad_symtab (abfd)) |
| sym_hashes_end -= symtab_hdr->sh_info; |
| |
| rel_end = relocs + sec->reloc_count; |
| for (rel = relocs; rel < rel_end; rel++) |
| { |
| struct elf_link_hash_entry *h; |
| unsigned long r_symndx; |
| |
| 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]; |
| |
| switch (ELF32_R_TYPE (rel->r_info)) |
| { |
| /* This relocation describes the C++ object vtable hierarchy. |
| Reconstruct it for later use during GC. */ |
| case R_D10V_GNU_VTINHERIT: |
| if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
| return false; |
| break; |
| |
| /* This relocation describes which C++ vtable entries are actually |
| used. Record for later use during GC. */ |
| case R_D10V_GNU_VTENTRY: |
| if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
| return false; |
| break; |
| } |
| } |
| |
| return true; |
| } |
| |
| /* Relocate a D10V ELF section. */ |
| static boolean |
| elf32_d10v_relocate_section (output_bfd, info, input_bfd, input_section, |
| contents, relocs, local_syms, local_sections) |
| bfd *output_bfd; |
| struct bfd_link_info *info; |
| bfd *input_bfd; |
| asection *input_section; |
| bfd_byte *contents; |
| Elf_Internal_Rela *relocs; |
| Elf_Internal_Sym *local_syms; |
| asection **local_sections; |
| { |
| Elf_Internal_Shdr *symtab_hdr; |
| struct elf_link_hash_entry **sym_hashes; |
| Elf_Internal_Rela *rel, *relend; |
| const char *name; |
| |
| 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); |
| |
| if (r_type == R_D10V_GNU_VTENTRY |
| || r_type == R_D10V_GNU_VTINHERIT ) |
| continue; |
| |
| howto = elf_d10v_howto_table + r_type; |
| |
| if (info->relocateable) |
| { |
| /* This is a relocateable link. We don't have to change |
| anything, unless the reloc is against a section symbol, |
| in which case we have to adjust according to where the |
| section symbol winds up in the output section. */ |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| sym = local_syms + r_symndx; |
| if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
| { |
| sec = local_sections[r_symndx]; |
| rel->r_addend += sec->output_offset + sym->st_value; |
| } |
| } |
| |
| continue; |
| } |
| |
| /* This is a final link. */ |
| h = NULL; |
| sym = NULL; |
| sec = NULL; |
| if (r_symndx < symtab_hdr->sh_info) |
| { |
| sym = local_syms + r_symndx; |
| sec = local_sections[r_symndx]; |
| relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel); |
| } |
| else |
| { |
| h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
| while (h->root.type == bfd_link_hash_indirect |
| || h->root.type == bfd_link_hash_warning) |
| h = (struct elf_link_hash_entry *) h->root.u.i.link; |
| if (h->root.type == bfd_link_hash_defined |
| || h->root.type == bfd_link_hash_defweak) |
| { |
| 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) |
| relocation = 0; |
| else |
| { |
| if (!((*info->callbacks->undefined_symbol) |
| (info, h->root.root.string, input_bfd, |
| input_section, rel->r_offset, true))) |
| return false; |
| relocation = 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 (input_bfd, sec); |
| } |
| |
| r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
| contents, rel->r_offset, |
| relocation, rel->r_addend); |
| |
| if (r != bfd_reloc_ok) |
| { |
| const char * msg = (const char *) 0; |
| |
| switch (r) |
| { |
| case bfd_reloc_overflow: |
| if (!((*info->callbacks->reloc_overflow) |
| (info, name, howto->name, (bfd_vma) 0, |
| input_bfd, input_section, rel->r_offset))) |
| return false; |
| break; |
| |
| case bfd_reloc_undefined: |
| if (!((*info->callbacks->undefined_symbol) |
| (info, name, input_bfd, input_section, |
| rel->r_offset, true))) |
| return false; |
| 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: |
| if (!((*info->callbacks->warning) |
| (info, msg, name, input_bfd, input_section, |
| rel->r_offset))) |
| return false; |
| break; |
| } |
| } |
| } |
| |
| return true; |
| } |
| #define ELF_ARCH bfd_arch_d10v |
| #define ELF_MACHINE_CODE EM_D10V |
| #define ELF_MACHINE_ALT1 EM_CYGNUS_D10V |
| #define ELF_MAXPAGESIZE 0x1000 |
| |
| #define TARGET_BIG_SYM bfd_elf32_d10v_vec |
| #define TARGET_BIG_NAME "elf32-d10v" |
| |
| #define elf_info_to_howto 0 |
| #define elf_info_to_howto_rel d10v_info_to_howto_rel |
| #define elf_backend_object_p 0 |
| #define elf_backend_final_write_processing 0 |
| #define elf_backend_gc_mark_hook elf32_d10v_gc_mark_hook |
| #define elf_backend_gc_sweep_hook elf32_d10v_gc_sweep_hook |
| #define elf_backend_check_relocs elf32_d10v_check_relocs |
| #define elf_backend_relocate_section elf32_d10v_relocate_section |
| #define elf_backend_can_gc_sections 1 |
| |
| #include "elf32-target.h" |