mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
462 lines
11 KiB
C
462 lines
11 KiB
C
/* 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;
|
||
}
|
||
}
|
||
|
||
|
||
/* 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"
|