+++ /dev/null
-/* Matsushita 10300 specific support for 32-bit ELF
- Copyright (C) 1996, 1997 Free Software Foundation, Inc.
-
-This file is part of BFD, the Binary File Descriptor library.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-#include "bfd.h"
-#include "sysdep.h"
-#include "libbfd.h"
-#include "elf-bfd.h"
-
-static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
- PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
-static void mn10300_info_to_howto
- PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
-static bfd_reloc_status_type bfd_elf32_mn10300_reloc
- PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-
-
-/* We have to use RELA instructions since md_apply_fix3 in the assembler
- does absolutely nothing. */
-#define USE_RELA
-
-enum reloc_type
-{
- R_MN10300_NONE = 0,
- R_MN10300_32,
- R_MN10300_16,
- R_MN10300_8,
- R_MN10300_PCREL32,
- R_MN10300_PCREL16,
- R_MN10300_PCREL8,
- R_MN10300_MAX
-};
-
-static reloc_howto_type elf_mn10300_howto_table[] =
-{
- /* Dummy relocation. Does nothing. */
- HOWTO (R_MN10300_NONE,
- 0,
- 2,
- 16,
- false,
- 0,
- complain_overflow_bitfield,
- bfd_elf_generic_reloc,
- "R_MN10300_NONE",
- false,
- 0,
- 0,
- false),
- /* Standard 32 bit reloc. */
- HOWTO (R_MN10300_32,
- 0,
- 2,
- 32,
- false,
- 0,
- complain_overflow_bitfield,
- bfd_elf_generic_reloc,
- "R_MN10300_32",
- false,
- 0xffffffff,
- 0xffffffff,
- false),
- /* Standard 16 bit reloc. */
- HOWTO (R_MN10300_16,
- 0,
- 1,
- 16,
- false,
- 0,
- complain_overflow_bitfield,
- bfd_elf_generic_reloc,
- "R_MN10300_16",
- false,
- 0xffff,
- 0xffff,
- false),
- /* Standard 8 bit reloc. */
- HOWTO (R_MN10300_8,
- 0,
- 0,
- 8,
- false,
- 0,
- complain_overflow_bitfield,
- bfd_elf_generic_reloc,
- "R_MN10300_8",
- false,
- 0xff,
- 0xff,
- false),
- /* Standard 32bit pc-relative reloc. */
- HOWTO (R_MN10300_PCREL32,
- 0,
- 2,
- 32,
- true,
- 0,
- complain_overflow_bitfield,
- bfd_elf_generic_reloc,
- "R_MN10300_PCREL32",
- false,
- 0xffffffff,
- 0xffffffff,
- true),
- /* Standard 16bit pc-relative reloc. */
- HOWTO (R_MN10300_PCREL16,
- 0,
- 1,
- 16,
- true,
- 0,
- complain_overflow_bitfield,
- bfd_elf_generic_reloc,
- "R_MN10300_PCREL16",
- false,
- 0xffff,
- 0xffff,
- true),
- /* Standard 8 pc-relative reloc. */
- HOWTO (R_MN10300_PCREL8,
- 0,
- 0,
- 8,
- true,
- 0,
- complain_overflow_bitfield,
- bfd_elf_generic_reloc,
- "R_MN10300_PCREL8",
- false,
- 0xff,
- 0xff,
- true),
-};
-
-struct mn10300_reloc_map
-{
- unsigned char bfd_reloc_val;
- unsigned char elf_reloc_val;
-};
-
-static const struct mn10300_reloc_map mn10300_reloc_map[] =
-{
- { BFD_RELOC_NONE, R_MN10300_NONE, },
- { BFD_RELOC_32, R_MN10300_32, },
- { BFD_RELOC_16, R_MN10300_16, },
- { BFD_RELOC_8, R_MN10300_8, },
- { BFD_RELOC_32_PCREL, R_MN10300_PCREL32, },
- { BFD_RELOC_16_PCREL, R_MN10300_PCREL16, },
- { BFD_RELOC_8_PCREL, R_MN10300_PCREL8, },
-};
-
-static reloc_howto_type *
-bfd_elf32_bfd_reloc_type_lookup (abfd, code)
- bfd *abfd;
- bfd_reloc_code_real_type code;
-{
- unsigned int i;
-
- for (i = 0;
- i < sizeof (mn10300_reloc_map) / sizeof (struct mn10300_reloc_map);
- i++)
- {
- if (mn10300_reloc_map[i].bfd_reloc_val == code)
- return &elf_mn10300_howto_table[mn10300_reloc_map[i].elf_reloc_val];
- }
-
- return NULL;
-}
-
-/* Set the howto pointer for an MN10300 ELF reloc. */
-
-static void
-mn10300_info_to_howto (abfd, cache_ptr, dst)
- bfd *abfd;
- arelent *cache_ptr;
- Elf32_Internal_Rela *dst;
-{
- unsigned int r_type;
-
- r_type = ELF32_R_TYPE (dst->r_info);
- BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX);
- cache_ptr->howto = &elf_mn10300_howto_table[r_type];
-}
-
-/* Perform a relocation as part of a final link. */
-static bfd_reloc_status_type
-mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
- input_section, contents, offset, value,
- addend, info, sym_sec, is_local)
- reloc_howto_type *howto;
- bfd *input_bfd;
- bfd *output_bfd;
- asection *input_section;
- bfd_byte *contents;
- bfd_vma offset;
- bfd_vma value;
- bfd_vma addend;
- struct bfd_link_info *info;
- asection *sym_sec;
- int is_local;
-{
- unsigned long r_type = howto->type;
- bfd_byte *hit_data = contents + offset;
-
- switch (r_type)
- {
-
- case R_MN10300_NONE:
- return bfd_reloc_ok;
-
- case R_MN10300_32:
- value += addend;
- bfd_put_32 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
-
- case R_MN10300_16:
- value += addend;
-
- if ((long)value > 0x7fff || (long)value < -0x8000)
- return bfd_reloc_overflow;
-
- bfd_put_16 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
-
- case R_MN10300_8:
- value += addend;
-
- if ((long)value > 0x7fff || (long)value < -0x8000)
- return bfd_reloc_overflow;
-
- bfd_put_8 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
-
- case R_MN10300_PCREL8:
- value -= (input_section->output_section->vma
- + input_section->output_offset);
- value -= offset;
- value += addend;
-
- if ((long)value > 0xff || (long)value < -0x100)
- return bfd_reloc_overflow;
-
- bfd_put_8 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
-
- case R_MN10300_PCREL16:
- value -= (input_section->output_section->vma
- + input_section->output_offset);
- value -= offset;
- value += addend;
-
- if ((long)value > 0xffff || (long)value < -0x10000)
- return bfd_reloc_overflow;
-
- bfd_put_16 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
-
- case R_MN10300_PCREL32:
- value -= (input_section->output_section->vma
- + input_section->output_offset);
- value -= offset;
- value += addend;
-
- bfd_put_32 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
-
- default:
- return bfd_reloc_notsupported;
- }
-}
-
-\f
-/* Relocate an MN10300 ELF section. */
-static boolean
-mn10300_elf_relocate_section (output_bfd, info, input_bfd, input_section,
- contents, relocs, local_syms, local_sections)
- bfd *output_bfd;
- struct bfd_link_info *info;
- bfd *input_bfd;
- asection *input_section;
- bfd_byte *contents;
- Elf_Internal_Rela *relocs;
- Elf_Internal_Sym *local_syms;
- asection **local_sections;
-{
- 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 = elf_mn10300_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 = (sec->output_section->vma
- + sec->output_offset
- + sym->st_value);
- }
- else
- {
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
- if (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- {
- 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)))
- return false;
- relocation = 0;
- }
- }
-
- r = mn10300_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 (input_bfd, sec);
- }
-
- 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)))
- 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 TARGET_LITTLE_SYM bfd_elf32_mn10300_vec
-#define TARGET_LITTLE_NAME "elf32-mn10300"
-#define ELF_ARCH bfd_arch_mn10300
-#define ELF_MACHINE_CODE EM_CYGNUS_MN10300
-#define ELF_MAXPAGESIZE 0x1000
-
-#define elf_info_to_howto mn10300_info_to_howto
-#define elf_info_to_howto_rel 0
-#define elf_backend_relocate_section mn10300_elf_relocate_section
-
-#define elf_symbol_leading_char '_'
-
-#include "elf32-target.h"
projects / external / binutils.git / commitdiff