#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/m32c.h"
#include "libiberty.h"
static reloc_howto_type * m32c_reloc_type_lookup
(bfd *, bfd_reloc_code_real_type);
static void m32c_info_to_howto_rela
(bfd *, arelent *, Elf_Internal_Rela *);
static bfd_boolean m32c_elf_relocate_section
(bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **);
static bfd_boolean m32c_elf_check_relocs
(bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
static bfd_boolean m32c_elf_relax_delete_bytes (bfd *, asection *, bfd_vma, int);
#ifdef DEBUG
char * m32c_get_reloc (long reloc);
void dump_symtab (bfd *, void *, void *);
#endif
static bfd_boolean m32c_elf_relax_section
(bfd *abfd, asection *sec, struct bfd_link_info *link_info, bfd_boolean *again);
static reloc_howto_type m32c_elf_howto_table [] =
{
HOWTO (R_M32C_NONE,
0,
0,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_M32C_NONE",
FALSE,
0,
0,
FALSE),
HOWTO (R_M32C_16,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_M32C_16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_M32C_24,
0,
2,
24,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_M32C_24",
FALSE,
0,
0xffffff,
FALSE),
HOWTO (R_M32C_32,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_M32C_32",
FALSE,
0,
0xffffffff,
FALSE),
HOWTO (R_M32C_8_PCREL,
0,
0,
8,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_M32C_8_PCREL",
FALSE,
0,
0xff,
TRUE),
HOWTO (R_M32C_16_PCREL,
0,
1,
16,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_M32C_16_PCREL",
FALSE,
0,
0xffff,
TRUE),
HOWTO (R_M32C_8,
0,
0,
8,
FALSE,
0,
complain_overflow_unsigned,
bfd_elf_generic_reloc,
"R_M32C_8",
FALSE,
0,
0xff,
FALSE),
HOWTO (R_M32C_LO16,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_M32C_LO16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_M32C_HI8,
0,
0,
8,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_M32C_HI8",
FALSE,
0,
0xff,
FALSE),
HOWTO (R_M32C_HI16,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_M32C_HI16",
FALSE,
0,
0xffff,
FALSE),
HOWTO (R_M32C_RL_JUMP,
0,
0,
0,
FALSE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_M32C_RL_JUMP",
FALSE,
0,
0,
FALSE),
HOWTO (R_M32C_RL_1ADDR,
0,
0,
0,
FALSE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_M32C_RL_1ADDR",
FALSE,
0,
0,
FALSE),
HOWTO (R_M32C_RL_2ADDR,
0,
0,
0,
FALSE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_M32C_RL_2ADDR",
FALSE,
0,
0,
FALSE),
};
struct m32c_reloc_map
{
bfd_reloc_code_real_type bfd_reloc_val;
unsigned int m32c_reloc_val;
};
static const struct m32c_reloc_map m32c_reloc_map [] =
{
{ BFD_RELOC_NONE, R_M32C_NONE },
{ BFD_RELOC_16, R_M32C_16 },
{ BFD_RELOC_24, R_M32C_24 },
{ BFD_RELOC_32, R_M32C_32 },
{ BFD_RELOC_8_PCREL, R_M32C_8_PCREL },
{ BFD_RELOC_16_PCREL, R_M32C_16_PCREL },
{ BFD_RELOC_8, R_M32C_8 },
{ BFD_RELOC_LO16, R_M32C_LO16 },
{ BFD_RELOC_HI16, R_M32C_HI16 },
{ BFD_RELOC_M32C_HI8, R_M32C_HI8 },
{ BFD_RELOC_M32C_RL_JUMP, R_M32C_RL_JUMP },
{ BFD_RELOC_M32C_RL_1ADDR, R_M32C_RL_1ADDR },
{ BFD_RELOC_M32C_RL_2ADDR, R_M32C_RL_2ADDR }
};
static reloc_howto_type *
m32c_reloc_type_lookup
(bfd * abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
unsigned int i;
for (i = ARRAY_SIZE (m32c_reloc_map); --i;)
if (m32c_reloc_map [i].bfd_reloc_val == code)
return & m32c_elf_howto_table [m32c_reloc_map[i].m32c_reloc_val];
return NULL;
}
static void
m32c_info_to_howto_rela
(bfd * abfd ATTRIBUTE_UNUSED,
arelent * cache_ptr,
Elf_Internal_Rela * dst)
{
unsigned int r_type;
r_type = ELF32_R_TYPE (dst->r_info);
BFD_ASSERT (r_type < (unsigned int) R_M32C_max);
cache_ptr->howto = & m32c_elf_howto_table [r_type];
}
static bfd_boolean
m32c_elf_relocate_section
(bfd * output_bfd ATTRIBUTE_UNUSED,
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;
Elf_Internal_Rela * relend;
bfd *dynobj;
asection *splt;
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
relend = relocs + input_section->reloc_count;
dynobj = elf_hash_table (info)->dynobj;
splt = NULL;
if (dynobj != NULL)
splt = bfd_get_section_by_name (dynobj, ".plt");
for (rel = relocs; rel < relend; rel ++)
{
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;
const char * name = NULL;
int r_type;
r_type = ELF32_R_TYPE (rel->r_info);
if (r_type == R_M32C_RL_JUMP
|| r_type == R_M32C_RL_1ADDR
|| r_type == R_M32C_RL_2ADDR)
continue;
r_symndx = ELF32_R_SYM (rel->r_info);
if (info->relocatable)
{
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;
}
howto = m32c_elf_howto_table + ELF32_R_TYPE (rel->r_info);
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);
name = bfd_elf_string_from_elf_section
(input_bfd, symtab_hdr->sh_link, sym->st_name);
name = (sym->st_name == 0) ? bfd_section_name (input_bfd, sec) : name;
}
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;
name = h->root.root.string;
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;
}
}
switch (ELF32_R_TYPE (rel->r_info))
{
case R_M32C_16:
{
bfd_vma *plt_offset;
if (h != NULL)
plt_offset = &h->plt.offset;
else
plt_offset = elf_local_got_offsets (input_bfd) + r_symndx;
if (relocation <= 0xffff)
{
BFD_ASSERT (*plt_offset == (bfd_vma) -1);
}
else
{
BFD_ASSERT (*plt_offset != (bfd_vma) -1);
if ((*plt_offset & 1) == 0)
{
unsigned int x;
x = 0x000000fc;
x |= (relocation << 8) & 0xffffff00;
bfd_put_32 (input_bfd, x, splt->contents + *plt_offset);
*plt_offset |= 1;
}
relocation = (splt->output_section->vma
+ splt->output_offset
+ (*plt_offset & -2));
if (name)
{
char *newname = bfd_malloc (strlen(name)+5);
strcpy (newname, name);
strcat(newname, ".plt");
_bfd_generic_link_add_one_symbol (info,
input_bfd,
newname,
BSF_FUNCTION | BSF_WEAK,
splt,
(*plt_offset & -2),
0,
1,
0,
0);
}
}
}
break;
case R_M32C_HI8:
case R_M32C_HI16:
relocation >>= 16;
break;
}
#if 0
printf ("relocate %s at %06lx relocation %06lx addend %ld ",
m32c_elf_howto_table[ELF32_R_TYPE(rel->r_info)].name,
rel->r_offset + input_section->output_section->vma + input_section->output_offset,
relocation, rel->r_addend);
{
int i;
for (i=0; i<4; i++)
printf (" %02x", contents[rel->r_offset+i]);
printf ("\n");
}
#endif
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 *) NULL;
switch (r)
{
case bfd_reloc_overflow:
r = info->callbacks->reloc_overflow
(info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
input_bfd, input_section, rel->r_offset);
break;
case bfd_reloc_undefined:
r = info->callbacks->undefined_symbol
(info, name, input_bfd, input_section, rel->r_offset,
TRUE);
break;
case bfd_reloc_outofrange:
msg = _("internal error: out of range error");
break;
case bfd_reloc_notsupported:
msg = _("internal error: unsupported relocation error");
break;
case bfd_reloc_dangerous:
msg = _("internal error: dangerous relocation");
break;
default:
msg = _("internal error: unknown error");
break;
}
if (msg)
r = info->callbacks->warning
(info, msg, name, input_bfd, input_section, rel->r_offset);
if (! r)
return FALSE;
}
}
return TRUE;
}
static bfd_boolean
m32c_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;
bfd_vma *local_plt_offsets;
asection *splt;
bfd *dynobj;
if (info->relocatable)
return TRUE;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
local_plt_offsets = elf_local_got_offsets (abfd);
splt = NULL;
dynobj = elf_hash_table(info)->dynobj;
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;
bfd_vma *offset;
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_M32C_16:
if (dynobj == NULL)
elf_hash_table (info)->dynobj = dynobj = abfd;
if (splt == NULL)
{
splt = bfd_get_section_by_name (dynobj, ".plt");
if (splt == NULL)
{
flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
| SEC_IN_MEMORY | SEC_LINKER_CREATED
| SEC_READONLY | SEC_CODE);
splt = bfd_make_section_with_flags (dynobj, ".plt", flags);
if (splt == NULL
|| ! bfd_set_section_alignment (dynobj, splt, 1))
return FALSE;
}
}
if (h != NULL)
offset = &h->plt.offset;
else
{
if (local_plt_offsets == NULL)
{
size_t size;
unsigned int i;
size = symtab_hdr->sh_info * sizeof (bfd_vma);
local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size);
if (local_plt_offsets == NULL)
return FALSE;
elf_local_got_offsets (abfd) = local_plt_offsets;
for (i = 0; i < symtab_hdr->sh_info; i++)
local_plt_offsets[i] = (bfd_vma) -1;
}
offset = &local_plt_offsets[r_symndx];
}
if (*offset == (bfd_vma) -1)
{
*offset = splt->size;
splt->size += 4;
}
break;
}
}
return TRUE;
}
static bfd_boolean
m32c_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED,
struct bfd_link_info *info)
{
bfd *dynobj;
asection *splt;
if ((dynobj = elf_hash_table (info)->dynobj) != NULL
&& (splt = bfd_get_section_by_name (dynobj, ".plt")) != NULL)
{
bfd_byte *contents = splt->contents;
unsigned int i, size = splt->size;
for (i = 0; i < size; i += 4)
{
unsigned int x = bfd_get_32 (dynobj, contents + i);
BFD_ASSERT (x != 0);
}
}
return TRUE;
}
static bfd_boolean
m32c_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
struct bfd_link_info *info)
{
bfd *dynobj;
asection *splt;
if (info->relocatable)
return TRUE;
dynobj = elf_hash_table (info)->dynobj;
if (dynobj == NULL)
return TRUE;
splt = bfd_get_section_by_name (dynobj, ".plt");
BFD_ASSERT (splt != NULL);
splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size);
if (splt->contents == NULL)
return FALSE;
return TRUE;
}
static bfd_boolean
m32c_elf_set_private_flags (bfd *abfd, flagword flags)
{
elf_elfheader (abfd)->e_flags = flags;
elf_flags_init (abfd) = TRUE;
return TRUE;
}
static bfd_boolean
m32c_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
{
flagword old_flags, old_partial;
flagword new_flags, new_partial;
bfd_boolean error = FALSE;
char new_opt[80];
char old_opt[80];
new_opt[0] = old_opt[0] = '\0';
new_flags = elf_elfheader (ibfd)->e_flags;
old_flags = elf_elfheader (obfd)->e_flags;
#ifdef DEBUG
(*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
bfd_get_filename (ibfd));
#endif
if (!elf_flags_init (obfd))
{
elf_flags_init (obfd) = TRUE;
elf_elfheader (obfd)->e_flags = new_flags;
}
else if (new_flags == old_flags)
;
else
{
new_partial = (new_flags & EF_M32C_CPU_MASK);
old_partial = (old_flags & EF_M32C_CPU_MASK);
if (new_partial == old_partial)
;
else
{
switch (new_partial)
{
default: strcat (new_opt, " -m16c"); break;
case EF_M32C_CPU_M16C: strcat (new_opt, " -m16c"); break;
case EF_M32C_CPU_M32C: strcat (new_opt, " -m32c"); break;
}
switch (old_partial)
{
default: strcat (old_opt, " -m16c"); break;
case EF_M32C_CPU_M16C: strcat (old_opt, " -m16c"); break;
case EF_M32C_CPU_M32C: strcat (old_opt, " -m32c"); break;
}
}
if (new_opt[0])
{
error = TRUE;
(*_bfd_error_handler)
(_("%s: compiled with %s and linked with modules compiled with %s"),
bfd_get_filename (ibfd), new_opt, old_opt);
}
new_flags &= ~ EF_M32C_ALL_FLAGS;
old_flags &= ~ EF_M32C_ALL_FLAGS;
if (new_flags != old_flags)
{
error = TRUE;
(*_bfd_error_handler)
(_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
}
}
if (error)
bfd_set_error (bfd_error_bad_value);
return !error;
}
static bfd_boolean
m32c_elf_print_private_bfd_data (bfd *abfd, PTR ptr)
{
FILE *file = (FILE *) ptr;
flagword flags;
BFD_ASSERT (abfd != NULL && ptr != NULL);
_bfd_elf_print_private_bfd_data (abfd, ptr);
flags = elf_elfheader (abfd)->e_flags;
fprintf (file, _("private flags = 0x%lx:"), (long)flags);
switch (flags & EF_M32C_CPU_MASK)
{
default: break;
case EF_M32C_CPU_M16C: fprintf (file, " -m16c"); break;
case EF_M32C_CPU_M32C: fprintf (file, " -m32c"); break;
}
fputc ('\n', file);
return TRUE;
}
static int
elf32_m32c_machine (bfd *abfd)
{
switch (elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK)
{
case EF_M32C_CPU_M16C: return bfd_mach_m16c;
case EF_M32C_CPU_M32C: return bfd_mach_m32c;
}
return bfd_mach_m16c;
}
static bfd_boolean
m32c_elf_object_p (bfd *abfd)
{
bfd_default_set_arch_mach (abfd, bfd_arch_m32c,
elf32_m32c_machine (abfd));
return TRUE;
}
#ifdef DEBUG
void
dump_symtab (bfd * abfd, void *internal_syms, void *external_syms)
{
size_t locsymcount;
Elf_Internal_Sym *isymbuf;
Elf_Internal_Sym *isymend;
Elf_Internal_Sym *isym;
Elf_Internal_Shdr *symtab_hdr;
bfd_boolean free_internal = 0, free_external = 0;
char * st_info_str;
char * st_info_stb_str;
char * st_other_str;
char * st_shndx_str;
if (! internal_syms)
{
internal_syms = bfd_malloc (1000);
free_internal = 1;
}
if (! external_syms)
{
external_syms = bfd_malloc (1000);
free_external = 1;
}
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
locsymcount = symtab_hdr->sh_size / get_elf_backend_data(abfd)->s->sizeof_sym;
if (free_internal)
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
symtab_hdr->sh_info, 0,
internal_syms, external_syms, NULL);
else
isymbuf = internal_syms;
isymend = isymbuf + locsymcount;
for (isym = isymbuf ; isym < isymend ; isym++)
{
switch (ELF_ST_TYPE (isym->st_info))
{
case STT_FUNC: st_info_str = "STT_FUNC";
case STT_SECTION: st_info_str = "STT_SECTION";
case STT_FILE: st_info_str = "STT_FILE";
case STT_OBJECT: st_info_str = "STT_OBJECT";
case STT_TLS: st_info_str = "STT_TLS";
default: st_info_str = "";
}
switch (ELF_ST_BIND (isym->st_info))
{
case STB_LOCAL: st_info_stb_str = "STB_LOCAL";
case STB_GLOBAL: st_info_stb_str = "STB_GLOBAL";
default: st_info_stb_str = "";
}
switch (ELF_ST_VISIBILITY (isym->st_other))
{
case STV_DEFAULT: st_other_str = "STV_DEFAULT";
case STV_INTERNAL: st_other_str = "STV_INTERNAL";
case STV_PROTECTED: st_other_str = "STV_PROTECTED";
default: st_other_str = "";
}
switch (isym->st_shndx)
{
case SHN_ABS: st_shndx_str = "SHN_ABS";
case SHN_COMMON: st_shndx_str = "SHN_COMMON";
case SHN_UNDEF: st_shndx_str = "SHN_UNDEF";
default: st_shndx_str = "";
}
printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s "
"st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n",
isym,
(unsigned long) isym->st_value,
(unsigned long) isym->st_size,
isym->st_name,
bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link,
isym->st_name),
isym->st_info, st_info_str, st_info_stb_str,
isym->st_other, st_other_str,
isym->st_shndx, st_shndx_str);
}
if (free_internal)
free (internal_syms);
if (free_external)
free (external_syms);
}
char *
m32c_get_reloc (long reloc)
{
if (0 <= reloc && reloc < R_M32C_max)
return m32c_elf_howto_table[reloc].name;
else
return "";
}
#endif
struct relax_plt_data
{
asection *splt;
bfd_boolean *again;
};
static bfd_boolean
m32c_relax_plt_check (struct elf_link_hash_entry *h,
PTR xdata)
{
struct relax_plt_data *data = (struct relax_plt_data *) xdata;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
if (h->plt.offset != (bfd_vma) -1)
{
bfd_vma address;
if (h->root.type == bfd_link_hash_undefined
|| h->root.type == bfd_link_hash_undefweak)
address = 0;
else
address = (h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset
+ h->root.u.def.value);
if (address <= 0xffff)
{
h->plt.offset = -1;
data->splt->size -= 4;
*data->again = TRUE;
}
}
return TRUE;
}
static bfd_boolean
m32c_relax_plt_realloc (struct elf_link_hash_entry *h,
PTR xdata)
{
bfd_vma *entry = (bfd_vma *) xdata;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
if (h->plt.offset != (bfd_vma) -1)
{
h->plt.offset = *entry;
*entry += 4;
}
return TRUE;
}
static bfd_boolean
m32c_elf_relax_plt_section (bfd *dynobj,
asection *splt,
struct bfd_link_info *info,
bfd_boolean *again)
{
struct relax_plt_data relax_plt_data;
bfd *ibfd;
*again = FALSE;
if (info->relocatable)
return TRUE;
if (dynobj != elf_hash_table (info)->dynobj
|| strcmp (splt->name, ".plt") != 0)
return TRUE;
if (splt->size == 0)
return TRUE;
relax_plt_data.splt = splt;
relax_plt_data.again = again;
elf_link_hash_traverse (elf_hash_table (info), m32c_relax_plt_check,
&relax_plt_data);
for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
{
bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Sym *isymbuf = NULL;
unsigned int idx;
if (! local_plt_offsets)
continue;
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
if (symtab_hdr->sh_info != 0)
{
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
if (isymbuf == NULL)
isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
symtab_hdr->sh_info, 0,
NULL, NULL, NULL);
if (isymbuf == NULL)
return FALSE;
}
for (idx = 0; idx < symtab_hdr->sh_info; ++idx)
{
Elf_Internal_Sym *isym;
asection *tsec;
bfd_vma address;
if (local_plt_offsets[idx] == (bfd_vma) -1)
continue;
isym = &isymbuf[idx];
if (isym->st_shndx == SHN_UNDEF)
continue;
else if (isym->st_shndx == SHN_ABS)
tsec = bfd_abs_section_ptr;
else if (isym->st_shndx == SHN_COMMON)
tsec = bfd_com_section_ptr;
else
tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx);
address = (tsec->output_section->vma
+ tsec->output_offset
+ isym->st_value);
if (address <= 0xffff)
{
local_plt_offsets[idx] = -1;
splt->size -= 4;
*again = TRUE;
}
}
if (isymbuf != NULL
&& symtab_hdr->contents != (unsigned char *) isymbuf)
{
if (! info->keep_memory)
free (isymbuf);
else
{
symtab_hdr->contents = (unsigned char *) isymbuf;
}
}
}
if (*again && splt->size > 0)
{
bfd_vma entry = 0;
elf_link_hash_traverse (elf_hash_table (info),
m32c_relax_plt_realloc, &entry);
for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
{
bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info;
unsigned int idx;
if (! local_plt_offsets)
continue;
for (idx = 0; idx < nlocals; ++idx)
if (local_plt_offsets[idx] != (bfd_vma) -1)
{
local_plt_offsets[idx] = entry;
entry += 4;
}
}
}
return TRUE;
}
static int
compare_reloc (const void *e1, const void *e2)
{
const Elf_Internal_Rela *i1 = (const Elf_Internal_Rela *) e1;
const Elf_Internal_Rela *i2 = (const Elf_Internal_Rela *) e2;
if (i1->r_offset == i2->r_offset)
return 0;
else
return i1->r_offset < i2->r_offset ? -1 : 1;
}
#define OFFSET_FOR_RELOC(rel) m32c_offset_for_reloc (abfd, rel, symtab_hdr, shndx_buf, intsyms)
static bfd_vma
m32c_offset_for_reloc (bfd *abfd,
Elf_Internal_Rela *rel,
Elf_Internal_Shdr *symtab_hdr,
Elf_External_Sym_Shndx *shndx_buf,
Elf_Internal_Sym *intsyms)
{
bfd_vma symval;
if (ELF32_R_SYM (rel->r_info) < symtab_hdr->sh_info)
{
Elf_Internal_Sym *isym;
Elf_External_Sym_Shndx *shndx;
asection *ssec;
isym = intsyms + ELF32_R_SYM (rel->r_info);
ssec = bfd_section_from_elf_index (abfd, isym->st_shndx);
shndx = shndx_buf + (shndx_buf ? ELF32_R_SYM (rel->r_info) : 0);
symval = isym->st_value;
if (ssec)
symval += ssec->output_section->vma
+ ssec->output_offset;
}
else
{
unsigned long indx;
struct elf_link_hash_entry *h;
indx = ELF32_R_SYM (rel->r_info) - symtab_hdr->sh_info;
h = elf_sym_hashes (abfd)[indx];
BFD_ASSERT (h != NULL);
if (h->root.type != bfd_link_hash_defined
&& h->root.type != bfd_link_hash_defweak)
return 0;
symval = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset);
}
return symval;
}
static int bytes_saved = 0;
static int bytes_to_reloc[] = {
R_M32C_NONE,
R_M32C_8,
R_M32C_16,
R_M32C_24,
R_M32C_32
};
#define RLA_RELOCS 0x0000000f
#define RLA_NBYTES 0x00000ff0
typedef struct {
int bytes;
unsigned int max_disp;
unsigned char new_encoding;
} EncodingTable;
static EncodingTable m16c_addr_encodings[] = {
{ 0, 0, 0 },
{ 0, 0, 1 },
{ 0, 0, 2 },
{ 0, 0, 3 },
{ 0, 0, 4 },
{ 0, 0, 5 },
{ 0, 0, 6 },
{ 0, 0, 7 },
{ 1, 0, 6 },
{ 1, 0, 7 },
{ 1, 0, 10 },
{ 1, 0, 11 },
{ 2, 255, 8 },
{ 2, 255, 9 },
{ 2, 255, 10 },
{ 2, 0, 15 },
};
static EncodingTable m16c_jmpaddr_encodings[] = {
{ 0, 0, 0 },
{ 0, 0, 1 },
{ 0, 0, 2 },
{ 0, 0, 3 },
{ 0, 0, 4 },
{ 0, 0, 5 },
{ 0, 0, 6 },
{ 0, 0, 7 },
{ 1, 0, 6 },
{ 1, 0, 7 },
{ 1, 0, 10 },
{ 1, 0, 11 },
{ 3, 255, 8 },
{ 3, 255, 9 },
{ 2, 255, 10 },
{ 2, 0, 15 },
};
static EncodingTable m32c_addr_encodings[] = {
{ 0, 0, 0 },
{ 0, 0, 1 },
{ 0, 0, 2 },
{ 0, 0, 3 },
{ 1, 0, 0 },
{ 1, 0, 1 },
{ 1, 0, 6 },
{ 1, 0, 7 },
{ 2, 255, 4 },
{ 2, 255, 5 },
{ 2, 255, 6 },
{ 2, 127, 7 },
{ 3, 65535, 8 },
{ 3, 65535, 9 },
{ 3, 65535, 15 },
{ 2, 0, 15 },
{ 0, 0, 16 },
{ 0, 0, 17 },
{ 0, 0, 18 },
{ 0, 0, 19 },
{ 0, 0, 20 },
{ 0, 0, 21 },
{ 0, 0, 22 },
{ 0, 0, 23 },
{ 0, 0, 24 },
{ 0, 0, 25 },
{ 0, 0, 26 },
{ 0, 0, 27 },
{ 0, 0, 28 },
{ 0, 0, 29 },
{ 0, 0, 30 },
{ 0, 0, 31 },
};
static bfd_boolean
m32c_elf_relax_section
(bfd * abfd,
asection * sec,
struct bfd_link_info * link_info,
bfd_boolean * again)
{
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Shdr *shndx_hdr;
Elf_Internal_Rela *internal_relocs;
Elf_Internal_Rela *free_relocs = NULL;
Elf_Internal_Rela *irel, *irelend, *srel;
bfd_byte * contents = NULL;
bfd_byte * free_contents = NULL;
Elf_Internal_Sym *intsyms = NULL;
Elf_Internal_Sym *free_intsyms = NULL;
Elf_External_Sym_Shndx *shndx_buf = NULL;
int machine;
if (abfd == elf_hash_table (link_info)->dynobj
&& strcmp (sec->name, ".plt") == 0)
return m32c_elf_relax_plt_section (abfd, sec, link_info, again);
*again = FALSE;
machine = elf32_m32c_machine (abfd);
if (link_info->relocatable
|| (sec->flags & SEC_RELOC) == 0
|| sec->reloc_count == 0
|| (sec->flags & SEC_CODE) == 0)
return TRUE;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
if (elf_section_data (sec)->this_hdr.contents != NULL)
contents = elf_section_data (sec)->this_hdr.contents;
else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
goto error_return;
if (symtab_hdr->contents != NULL)
{
intsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
}
else
{
intsyms = bfd_elf_get_elf_syms (abfd, symtab_hdr, symtab_hdr->sh_info, 0, NULL, NULL, NULL);
symtab_hdr->contents = (bfd_byte *) intsyms;
}
if (shndx_hdr->sh_size != 0)
{
bfd_size_type amt;
amt = symtab_hdr->sh_info;
amt *= sizeof (Elf_External_Sym_Shndx);
shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
if (shndx_buf == NULL)
goto error_return;
if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0
|| bfd_bread ((PTR) shndx_buf, amt, abfd) != amt)
goto error_return;
shndx_hdr->contents = (bfd_byte *) shndx_buf;
}
internal_relocs = (_bfd_elf_link_read_relocs
(abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
link_info->keep_memory));
if (internal_relocs == NULL)
goto error_return;
if (! link_info->keep_memory)
free_relocs = internal_relocs;
qsort (internal_relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
compare_reloc);
irelend = internal_relocs + sec->reloc_count;
for (irel = internal_relocs; irel < irelend; irel++)
{
bfd_vma symval;
unsigned char *insn, *gap, *einsn;
bfd_vma pc;
bfd_signed_vma pcrel;
int relax_relocs;
int gap_size;
int new_type;
int posn;
int enc;
EncodingTable *enctbl;
EncodingTable *e;
if (ELF32_R_TYPE(irel->r_info) != R_M32C_RL_JUMP
&& ELF32_R_TYPE(irel->r_info) != R_M32C_RL_1ADDR
&& ELF32_R_TYPE(irel->r_info) != R_M32C_RL_2ADDR)
continue;
srel = irel;
BFD_ASSERT (irel->r_offset < sec->size);
insn = contents + irel->r_offset;
relax_relocs = irel->r_addend % 16;
srel = irel + (relax_relocs ? 1 : 0);
symval = OFFSET_FOR_RELOC (srel);
gap_size = 0;
gap = NULL;
new_type = ELF32_R_TYPE(srel->r_info);
pc = sec->output_section->vma + sec->output_offset
+ srel->r_offset;
pcrel = symval - pc + srel->r_addend;
if (machine == bfd_mach_m16c)
{
switch (ELF32_R_TYPE(irel->r_info))
{
case R_M32C_RL_JUMP:
switch (insn[0])
{
case 0xfe:
if (pcrel >= 2 && pcrel <= 9)
{
insn[0] = 0x60 | (pcrel - 2);
new_type = R_M32C_NONE;
irel->r_addend = 0x10;
gap_size = 1;
gap = insn + 1;
}
break;
case 0xf4:
if (pcrel <= 128 && pcrel >= -128)
{
insn[0] = 0xfe;
insn[1] = 0;
new_type = R_M32C_8_PCREL;
gap_size = 1;
gap = insn + 2;
}
break;
case 0xfc:
if (pcrel <= 32768 && pcrel >= -32768)
{
insn[0] = 0xf4;
insn[1] = 0;
insn[2] = 0;
new_type = R_M32C_16_PCREL;
gap_size = 1;
gap = insn + 3;
}
break;
case 0xfd:
if (pcrel <= 32768 && pcrel >= -32768)
{
insn[0] = 0xf5;
insn[1] = 0;
insn[2] = 0;
new_type = R_M32C_16_PCREL;
gap_size = 1;
gap = insn + 3;
}
break;
}
break;
case R_M32C_RL_2ADDR:
enctbl = m16c_addr_encodings;
posn = 2;
enc = (insn[1] >> 4) & 0x0f;
e = & enctbl[enc];
if (srel->r_offset == irel->r_offset + posn
&& e->new_encoding != enc
&& symval <= e->max_disp)
{
insn[1] &= 0x0f;
insn[1] |= e->new_encoding << 4;
gap_size = e->bytes - enctbl[e->new_encoding].bytes;
gap = insn + posn + enctbl[e->new_encoding].bytes;
new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
break;
}
if (relax_relocs == 2)
srel ++;
posn += e->bytes;
goto try_1addr_16;
case R_M32C_RL_1ADDR:
enctbl = m16c_addr_encodings;
posn = 2;
enc = insn[0] * 256 + insn[1];
enc &= 0xfff0;
if (enc == 0x7d20
|| enc == 0x7d00
|| enc == 0x7d30
|| enc == 0x7d10)
{
enctbl = m16c_jmpaddr_encodings;
}
try_1addr_16:
symval = OFFSET_FOR_RELOC (srel);
enc = insn[1] & 0x0f;
e = & enctbl[enc];
if (srel->r_offset == irel->r_offset + posn
&& e->new_encoding != enc
&& symval <= e->max_disp)
{
insn[1] &= 0xf0;
insn[1] |= e->new_encoding;
gap_size = e->bytes - enctbl[e->new_encoding].bytes;
gap = insn + posn + enctbl[e->new_encoding].bytes;
new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
break;
}
break;
}
}
else
{
switch (ELF32_R_TYPE(irel->r_info))
{
case R_M32C_RL_JUMP:
switch (insn[0])
{
case 0xbb:
if (pcrel >= 2 && pcrel <= 9)
{
int p = pcrel - 2;
insn[0] = 0x4a | ((p << 3) & 0x30) | (p & 1);
new_type = R_M32C_NONE;
irel->r_addend = 0x10;
gap_size = 1;
gap = insn + 1;
}
break;
case 0xce:
if (pcrel <= 128 && pcrel >= -128)
{
insn[0] = 0xbb;
insn[1] = 0;
new_type = R_M32C_8_PCREL;
gap_size = 1;
gap = insn + 2;
}
break;
case 0xcc:
if (pcrel <= 32768 && pcrel >= -32768)
{
insn[0] = 0xce;
insn[1] = 0;
insn[2] = 0;
new_type = R_M32C_16_PCREL;
gap_size = 1;
gap = insn + 3;
}
break;
case 0xcd:
if (pcrel <= 32768 && pcrel >= -32768)
{
insn[0] = 0xcf;
insn[1] = 0;
insn[2] = 0;
new_type = R_M32C_16_PCREL;
gap_size = 1;
gap = insn + 3;
}
break;
}
break;
case R_M32C_RL_2ADDR:
einsn = insn;
posn = 2;
if (einsn[0] == 1)
{
einsn ++;
posn ++;
}
enctbl = m32c_addr_encodings;
enc = ((einsn[0] & 0x70) >> 2) | ((einsn[1] & 0x30) >> 4);
e = & enctbl[enc];
if (srel->r_offset == irel->r_offset + posn
&& e->new_encoding != enc
&& symval <= e->max_disp)
{
einsn[0] &= 0x8f;
einsn[0] |= (e->new_encoding & 0x1c) << 2;
einsn[1] &= 0xcf;
einsn[1] |= (e->new_encoding & 0x03) << 4;
gap_size = e->bytes - enctbl[e->new_encoding].bytes;
gap = insn + posn + enctbl[e->new_encoding].bytes;
new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
break;
}
if (relax_relocs == 2)
srel ++;
posn += e->bytes;
goto try_1addr_32;
case R_M32C_RL_1ADDR:
einsn = insn;
posn = 2;
if (einsn[0] == 1)
{
einsn ++;
posn ++;
}
enctbl = m32c_addr_encodings;
try_1addr_32:
symval = OFFSET_FOR_RELOC (srel);
enc = ((einsn[0] & 0x0e) << 1) | ((einsn[1] & 0xc0) >> 6);
e = & enctbl[enc];
if (srel->r_offset == irel->r_offset + posn
&& e->new_encoding != enc
&& symval <= e->max_disp)
{
einsn[0] &= 0xf1;
einsn[0] |= (e->new_encoding & 0x1c) >> 1;
einsn[1] &= 0x3f;
einsn[1] |= (e->new_encoding & 0x03) << 6;
gap_size = e->bytes - enctbl[e->new_encoding].bytes;
gap = insn + posn + enctbl[e->new_encoding].bytes;
new_type = bytes_to_reloc[enctbl[e->new_encoding].bytes];
break;
}
break;
}
}
if (gap_size == 0)
continue;
*again = TRUE;
srel->r_info = ELF32_R_INFO (ELF32_R_SYM (srel->r_info), new_type);
elf_section_data (sec)->relocs = internal_relocs;
free_relocs = NULL;
elf_section_data (sec)->this_hdr.contents = contents;
free_contents = NULL;
symtab_hdr->contents = (bfd_byte *) intsyms;
free_intsyms = NULL;
bytes_saved += gap_size;
if (! m32c_elf_relax_delete_bytes(abfd, sec, gap - contents, gap_size))
goto error_return;
}
if (free_relocs != NULL)
{
free (free_relocs);
free_relocs = NULL;
}
if (free_contents != NULL)
{
if (! link_info->keep_memory)
free (free_contents);
else
elf_section_data (sec)->this_hdr.contents = contents;
free_contents = NULL;
}
if (shndx_buf != NULL)
{
shndx_hdr->contents = NULL;
free (shndx_buf);
}
if (free_intsyms != NULL)
{
if (! link_info->keep_memory)
free (free_intsyms);
else
{
symtab_hdr->contents = NULL ;
}
free_intsyms = NULL;
}
return TRUE;
error_return:
if (free_relocs != NULL)
free (free_relocs);
if (free_contents != NULL)
free (free_contents);
if (shndx_buf != NULL)
{
shndx_hdr->contents = NULL;
free (shndx_buf);
}
if (free_intsyms != NULL)
free (free_intsyms);
return FALSE;
}
static bfd_boolean
m32c_elf_relax_delete_bytes
(bfd * abfd,
asection * sec,
bfd_vma addr,
int count)
{
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Shdr *shndx_hdr;
int sec_shndx;
bfd_byte *contents;
Elf_Internal_Rela *irel;
Elf_Internal_Rela *irelend;
Elf_Internal_Rela *irelalign;
bfd_vma toaddr;
Elf_Internal_Sym *isym;
Elf_Internal_Sym *isymend;
Elf_Internal_Sym *intsyms;
Elf_External_Sym_Shndx *shndx_buf;
Elf_External_Sym_Shndx *shndx;
struct elf_link_hash_entry ** sym_hashes;
struct elf_link_hash_entry ** end_hashes;
unsigned int symcount;
contents = elf_section_data (sec)->this_hdr.contents;
irelalign = NULL;
toaddr = sec->size;
irel = elf_section_data (sec)->relocs;
irelend = irel + sec->reloc_count;
memmove (contents + addr, contents + addr + count, (size_t) (toaddr - addr - count));
sec->size -= count;
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel ++)
{
if (irel->r_offset > addr && irel->r_offset < toaddr)
irel->r_offset -= count;
if (ELF32_R_TYPE(irel->r_info) == R_M32C_RL_JUMP
&& irel->r_addend == 0x10
&& irel->r_offset + 1 < addr
&& irel->r_offset + 7 > addr)
{
bfd_vma disp;
unsigned char *insn = &contents[irel->r_offset];
disp = *insn;
if (elf32_m32c_machine (abfd) == bfd_mach_m16c)
{
if ((*insn & 0xf8) != 0x60)
continue;
disp = (disp & 7);
}
else
{
if ((*insn & 0xce) != 0x4a)
continue;
disp = ((disp & 0x30) >> 3) | (disp & 1);
}
if (irel->r_offset + disp + 2 >= addr+count)
{
disp -= count;
if (elf32_m32c_machine (abfd) == bfd_mach_m16c)
{
*insn = (*insn & 0xf8) | disp;
}
else
{
*insn = (*insn & 0xce) | ((disp & 6) << 3) | (disp & 1);
}
}
}
}
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
intsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
isym = intsyms;
isymend = isym + symtab_hdr->sh_info;
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
shndx_hdr = & elf_tdata (abfd)->symtab_shndx_hdr;
shndx_buf = (Elf_External_Sym_Shndx *) shndx_hdr->contents;
shndx = shndx_buf;
for (; isym < isymend; isym++, shndx = (shndx ? shndx + 1 : NULL))
{
if ((int) isym->st_shndx == sec_shndx
&& isym->st_value > addr
&& isym->st_value < toaddr)
{
isym->st_value -= count;
}
}
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
- symtab_hdr->sh_info);
sym_hashes = elf_sym_hashes (abfd);
end_hashes = sym_hashes + symcount;
for (; sym_hashes < end_hashes; sym_hashes ++)
{
struct elf_link_hash_entry * sym_hash = * sym_hashes;
if (sym_hash &&
( sym_hash->root.type == bfd_link_hash_defined
|| sym_hash->root.type == bfd_link_hash_defweak)
&& sym_hash->root.u.def.section == sec
&& sym_hash->root.u.def.value > addr
&& sym_hash->root.u.def.value < toaddr)
{
sym_hash->root.u.def.value -= count;
}
}
return TRUE;
}
#define ELF_ARCH bfd_arch_m32c
#define ELF_MACHINE_CODE EM_M32C
#define ELF_MAXPAGESIZE 0x1000
#if 0
#define TARGET_BIG_SYM bfd_elf32_m32c_vec
#define TARGET_BIG_NAME "elf32-m32c"
#else
#define TARGET_LITTLE_SYM bfd_elf32_m32c_vec
#define TARGET_LITTLE_NAME "elf32-m32c"
#endif
#define elf_info_to_howto_rel NULL
#define elf_info_to_howto m32c_info_to_howto_rela
#define elf_backend_object_p m32c_elf_object_p
#define elf_backend_relocate_section m32c_elf_relocate_section
#define elf_backend_check_relocs m32c_elf_check_relocs
#define elf_backend_object_p m32c_elf_object_p
#define elf_symbol_leading_char ('_')
#define elf_backend_always_size_sections \
m32c_elf_always_size_sections
#define elf_backend_finish_dynamic_sections \
m32c_elf_finish_dynamic_sections
#define elf_backend_can_gc_sections 1
#define bfd_elf32_bfd_reloc_type_lookup m32c_reloc_type_lookup
#define bfd_elf32_bfd_relax_section m32c_elf_relax_section
#define bfd_elf32_bfd_set_private_flags m32c_elf_set_private_flags
#define bfd_elf32_bfd_merge_private_bfd_data m32c_elf_merge_private_bfd_data
#define bfd_elf32_bfd_print_private_bfd_data m32c_elf_print_private_bfd_data
#include "elf32-target.h"