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NetBSD/gnu/dist/bfd/elf-m10300.c

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stock binutils-2.8
1997-09-24 19:39:15 +04:00
/* 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"