#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/mcore.h"
#include <assert.h>
static bfd_boolean
mcore_elf_set_private_flags (bfd * abfd, flagword flags)
{
BFD_ASSERT (! elf_flags_init (abfd)
|| elf_elfheader (abfd)->e_flags == flags);
elf_elfheader (abfd)->e_flags = flags;
elf_flags_init (abfd) = TRUE;
return TRUE;
}
static bfd_boolean
mcore_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
{
flagword old_flags;
flagword new_flags;
if (! _bfd_generic_verify_endian_match (ibfd, obfd))
return FALSE;
if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
return TRUE;
new_flags = elf_elfheader (ibfd)->e_flags;
old_flags = elf_elfheader (obfd)->e_flags;
if (! elf_flags_init (obfd))
{
elf_flags_init (obfd) = TRUE;
elf_elfheader (obfd)->e_flags = new_flags;
}
else if (new_flags == old_flags)
;
else
{
}
return TRUE;
}
static bfd_reloc_status_type
mcore_elf_unsupported_reloc (bfd * abfd,
arelent * reloc_entry,
asymbol * symbol ATTRIBUTE_UNUSED,
PTR data ATTRIBUTE_UNUSED,
asection * input_section ATTRIBUTE_UNUSED,
bfd * output_bfd ATTRIBUTE_UNUSED,
char ** error_message ATTRIBUTE_UNUSED)
{
BFD_ASSERT (reloc_entry->howto != (reloc_howto_type *)0);
_bfd_error_handler (_("%B: Relocation %s (%d) is not currently supported.\n"),
abfd,
reloc_entry->howto->name,
reloc_entry->howto->type);
return bfd_reloc_notsupported;
}
static reloc_howto_type * mcore_elf_howto_table [(int) R_MCORE_max];
static reloc_howto_type mcore_elf_howto_raw[] =
{
HOWTO (R_MCORE_NONE,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
NULL,
"R_MCORE_NONE",
FALSE,
0,
0,
FALSE),
HOWTO (R_MCORE_ADDR32,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"ADDR32",
FALSE,
0x0,
0xffffffff,
FALSE),
HOWTO (R_MCORE_PCRELIMM8BY4,
2,
1,
8,
TRUE,
0,
complain_overflow_bitfield,
mcore_elf_unsupported_reloc,
"R_MCORE_PCRELIMM8BY4",
FALSE,
0,
0,
TRUE),
HOWTO (R_MCORE_PCRELIMM11BY2,
1,
1,
11,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_MCORE_PCRELIMM11BY2",
FALSE,
0x0,
0x7ff,
TRUE),
HOWTO (R_MCORE_PCRELIMM4BY2,
1,
1,
4,
TRUE,
0,
complain_overflow_bitfield,
mcore_elf_unsupported_reloc,
"R_MCORE_PCRELIMM4BY2",
FALSE,
0,
0,
TRUE),
HOWTO (R_MCORE_PCREL32,
0,
2,
32,
TRUE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MCORE_PCREL32",
FALSE,
0x0,
0xffffffff,
TRUE),
HOWTO (R_MCORE_PCRELJSR_IMM11BY2,
1,
1,
11,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_MCORE_PCRELJSR_IMM11BY2",
FALSE,
0x0,
0x7ff,
TRUE),
HOWTO (R_MCORE_GNU_VTINHERIT,
0,
2,
0,
FALSE,
0,
complain_overflow_dont,
NULL,
"R_MCORE_GNU_VTINHERIT",
FALSE,
0,
0,
FALSE),
HOWTO (R_MCORE_GNU_VTENTRY,
0,
2,
0,
FALSE,
0,
complain_overflow_dont,
_bfd_elf_rel_vtable_reloc_fn,
"R_MCORE_GNU_VTENTRY",
FALSE,
0,
0,
FALSE),
HOWTO (R_MCORE_RELATIVE,
0,
2,
32,
FALSE,
0,
complain_overflow_signed,
NULL,
"R_MCORE_RELATIVE",
TRUE,
0xffffffff,
0xffffffff,
FALSE)
};
#ifndef NUM_ELEM
#define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0])
#endif
static void
mcore_elf_howto_init (void)
{
unsigned int i;
for (i = NUM_ELEM (mcore_elf_howto_raw); i--;)
{
unsigned int type;
type = mcore_elf_howto_raw[i].type;
BFD_ASSERT (type < NUM_ELEM (mcore_elf_howto_table));
mcore_elf_howto_table [type] = & mcore_elf_howto_raw [i];
}
}
static reloc_howto_type *
mcore_elf_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
enum elf_mcore_reloc_type mcore_reloc = R_MCORE_NONE;
switch (code)
{
case BFD_RELOC_NONE: mcore_reloc = R_MCORE_NONE; break;
case BFD_RELOC_32: mcore_reloc = R_MCORE_ADDR32; break;
case BFD_RELOC_MCORE_PCREL_IMM8BY4: mcore_reloc = R_MCORE_PCRELIMM8BY4; break;
case BFD_RELOC_MCORE_PCREL_IMM11BY2: mcore_reloc = R_MCORE_PCRELIMM11BY2; break;
case BFD_RELOC_MCORE_PCREL_IMM4BY2: mcore_reloc = R_MCORE_PCRELIMM4BY2; break;
case BFD_RELOC_32_PCREL: mcore_reloc = R_MCORE_PCREL32; break;
case BFD_RELOC_MCORE_PCREL_JSR_IMM11BY2: mcore_reloc = R_MCORE_PCRELJSR_IMM11BY2; break;
case BFD_RELOC_VTABLE_INHERIT: mcore_reloc = R_MCORE_GNU_VTINHERIT; break;
case BFD_RELOC_VTABLE_ENTRY: mcore_reloc = R_MCORE_GNU_VTENTRY; break;
case BFD_RELOC_RVA: mcore_reloc = R_MCORE_RELATIVE; break;
default:
return NULL;
}
if (! mcore_elf_howto_table [R_MCORE_PCRELIMM8BY4])
mcore_elf_howto_init ();
return mcore_elf_howto_table [(int) mcore_reloc];
};
static void
mcore_elf_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED,
arelent * cache_ptr,
Elf_Internal_Rela * dst)
{
if (! mcore_elf_howto_table [R_MCORE_PCRELIMM8BY4])
mcore_elf_howto_init ();
BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_MCORE_max);
cache_ptr->howto = mcore_elf_howto_table [ELF32_R_TYPE (dst->r_info)];
}
static bfd_boolean
mcore_elf_relocate_section (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 = & elf_tdata (input_bfd)->symtab_hdr;
struct elf_link_hash_entry ** sym_hashes = elf_sym_hashes (input_bfd);
Elf_Internal_Rela * rel = relocs;
Elf_Internal_Rela * relend = relocs + input_section->reloc_count;
bfd_boolean ret = TRUE;
#ifdef DEBUG
_bfd_error_handler
("mcore_elf_relocate_section called for %B section %A, %ld relocations%s",
input_bfd,
input_section,
(long) input_section->reloc_count,
(info->relocatable) ? " (relocatable)" : "");
#endif
if (info->relocatable)
return TRUE;
if (! mcore_elf_howto_table [R_MCORE_PCRELIMM8BY4])
mcore_elf_howto_init ();
for (; rel < relend; rel++)
{
enum elf_mcore_reloc_type r_type = (enum elf_mcore_reloc_type) ELF32_R_TYPE (rel->r_info);
bfd_vma offset = rel->r_offset;
bfd_vma addend = rel->r_addend;
bfd_reloc_status_type r = bfd_reloc_other;
asection * sec = NULL;
reloc_howto_type * howto;
bfd_vma relocation;
Elf_Internal_Sym * sym = NULL;
unsigned long r_symndx;
struct elf_link_hash_entry * h = NULL;
unsigned short oldinst = 0;
if ((unsigned) r_type >= (unsigned) R_MCORE_max
|| ! mcore_elf_howto_table [(int)r_type])
{
_bfd_error_handler (_("%B: Unknown relocation type %d\n"),
input_bfd, (int) r_type);
bfd_set_error (bfd_error_bad_value);
ret = FALSE;
continue;
}
howto = mcore_elf_howto_table [(int) r_type];
r_symndx = ELF32_R_SYM (rel->r_info);
if (howto->special_function == mcore_elf_unsupported_reloc)
{
_bfd_error_handler (_("%B: Relocation %s (%d) is not currently supported.\n"),
input_bfd,
howto->name,
(int)r_type);
bfd_set_error (bfd_error_bad_value);
ret = FALSE;
continue;
}
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);
addend = rel->r_addend;
}
else
{
bfd_boolean unresolved_reloc, warned;
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
r_symndx, symtab_hdr, sym_hashes,
h, sec, relocation,
unresolved_reloc, warned);
}
switch (r_type)
{
default:
break;
case R_MCORE_PCRELJSR_IMM11BY2:
oldinst = bfd_get_16 (input_bfd, contents + offset);
#define MCORE_INST_BSR 0xF800
bfd_put_16 (input_bfd, (bfd_vma) MCORE_INST_BSR, contents + offset);
break;
}
#ifdef DEBUG
fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
howto->name, r_type, r_symndx, (long) offset, (long) addend);
#endif
r = _bfd_final_link_relocate
(howto, input_bfd, input_section, contents, offset, relocation, addend);
if (r != bfd_reloc_ok && r_type == R_MCORE_PCRELJSR_IMM11BY2)
{
bfd_put_16 (input_bfd, (bfd_vma) oldinst, contents + offset);
r = bfd_reloc_ok;
}
if (r != bfd_reloc_ok)
{
ret = FALSE;
switch (r)
{
default:
break;
case bfd_reloc_overflow:
{
const char * name;
if (h != NULL)
name = NULL;
else
{
name = bfd_elf_string_from_elf_section
(input_bfd, symtab_hdr->sh_link, sym->st_name);
if (name == NULL)
break;
if (* name == '\0')
name = bfd_section_name (input_bfd, sec);
}
(*info->callbacks->reloc_overflow)
(info, (h ? &h->root : NULL), name, howto->name,
(bfd_vma) 0, input_bfd, input_section, offset);
}
break;
}
}
}
#ifdef DEBUG
fprintf (stderr, "\n");
#endif
return ret;
}
static asection *
mcore_elf_gc_mark_hook (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)
return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
switch (ELF32_R_TYPE (rel->r_info))
{
case R_MCORE_GNU_VTINHERIT:
case R_MCORE_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;
}
}
return NULL;
}
static bfd_boolean
mcore_elf_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
struct bfd_link_info * info ATTRIBUTE_UNUSED,
asection * sec ATTRIBUTE_UNUSED,
const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
{
return TRUE;
}
static bfd_boolean
mcore_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;
struct elf_link_hash_entry ** sym_hashes_end;
const Elf_Internal_Rela * rel;
const Elf_Internal_Rela * rel_end;
if (info->relocatable)
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];
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))
{
case R_MCORE_GNU_VTINHERIT:
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
return FALSE;
break;
case R_MCORE_GNU_VTENTRY:
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
return FALSE;
break;
}
}
return TRUE;
}
static const struct bfd_elf_special_section mcore_elf_special_sections[]=
{
{ ".ctors", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
{ ".dtors", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
{ NULL, 0, 0, 0, 0 }
};
#define TARGET_BIG_SYM bfd_elf32_mcore_big_vec
#define TARGET_BIG_NAME "elf32-mcore-big"
#define TARGET_LITTLE_SYM bfd_elf32_mcore_little_vec
#define TARGET_LITTLE_NAME "elf32-mcore-little"
#define ELF_ARCH bfd_arch_mcore
#define ELF_MACHINE_CODE EM_MCORE
#define ELF_MAXPAGESIZE 0x1000
#define elf_info_to_howto mcore_elf_info_to_howto
#define elf_info_to_howto_rel NULL
#define bfd_elf32_bfd_merge_private_bfd_data mcore_elf_merge_private_bfd_data
#define bfd_elf32_bfd_set_private_flags mcore_elf_set_private_flags
#define bfd_elf32_bfd_reloc_type_lookup mcore_elf_reloc_type_lookup
#define elf_backend_relocate_section mcore_elf_relocate_section
#define elf_backend_gc_mark_hook mcore_elf_gc_mark_hook
#define elf_backend_gc_sweep_hook mcore_elf_gc_sweep_hook
#define elf_backend_check_relocs mcore_elf_check_relocs
#define elf_backend_special_sections mcore_elf_special_sections
#define elf_backend_can_gc_sections 1
#define elf_backend_rela_normal 1
#include "elf32-target.h"