Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
2006 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/mn10300.h"
static bfd_reloc_status_type mn10300_elf_final_link_relocate
PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
bfd_vma, bfd_vma, bfd_vma,
struct elf_link_hash_entry *, unsigned long, struct bfd_link_info *,
asection *, int));
static bfd_boolean mn10300_elf_relocate_section
PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
static bfd_boolean mn10300_elf_relax_section
PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
static bfd_byte * mn10300_elf_get_relocated_section_contents
PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
bfd_byte *, bfd_boolean, asymbol **));
static unsigned long elf_mn10300_mach
PARAMS ((flagword));
void _bfd_mn10300_elf_final_write_processing
PARAMS ((bfd *, bfd_boolean));
bfd_boolean _bfd_mn10300_elf_object_p
PARAMS ((bfd *));
bfd_boolean _bfd_mn10300_elf_merge_private_bfd_data
PARAMS ((bfd *,bfd *));
it decides to copy in check_relocs for each symbol. This is so
that it can discard PC relative relocs if it doesn't need them when
linking with -Bsymbolic. We store the information in a field
extending the regular ELF linker hash table. */
struct elf32_mn10300_link_hash_entry {
struct elf_link_hash_entry root;
called directly (ie by name). */
unsigned int direct_calls;
(if <= 255 bytes). We stuff this into "call" instructions
to this target when it's valid and profitable to do so.
This does not include stack allocated by movm! */
unsigned char stack_size;
in the prologue. We stuff this value into "call" instructions
to the target when it's valid and profitable to do so. */
unsigned char movm_args;
by the movm instruction. This is redundant with movm_args, but we
add it to the hash table to avoid computing it over and over. */
unsigned char movm_stack_size;
instructions. */
#define MN10300_CONVERT_CALL_TO_CALLS 0x1
prologue deleted. */
#define MN10300_DELETED_PROLOGUE_BYTES 0x2
unsigned char flags;
};
we can store state variables and a secondary hash table without
resorting to global variables. */
struct elf32_mn10300_link_hash_table {
struct elf_link_hash_table root;
instead of using the full elf32_mn10300_link_hash_table if we wanted
to save some memory. */
struct elf32_mn10300_link_hash_table *static_hash_table;
#define MN10300_HASH_ENTRIES_INITIALIZED 0x1
char flags;
};
#define elf32_mn10300_hash_table(p) \
((struct elf32_mn10300_link_hash_table *) ((p)->hash))
#define elf32_mn10300_link_hash_traverse(table, func, info) \
(elf_link_hash_traverse \
(&(table)->root, \
(bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
(info)))
static struct bfd_hash_entry *elf32_mn10300_link_hash_newfunc
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
static struct bfd_link_hash_table *elf32_mn10300_link_hash_table_create
PARAMS ((bfd *));
static void elf32_mn10300_link_hash_table_free
PARAMS ((struct bfd_link_hash_table *));
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 *, Elf_Internal_Rela *));
static bfd_boolean mn10300_elf_check_relocs
PARAMS ((bfd *, struct bfd_link_info *, asection *,
const Elf_Internal_Rela *));
static asection *mn10300_elf_gc_mark_hook
PARAMS ((asection *, struct bfd_link_info *info, Elf_Internal_Rela *,
struct elf_link_hash_entry *, Elf_Internal_Sym *));
static bfd_boolean mn10300_elf_relax_delete_bytes
PARAMS ((bfd *, asection *, bfd_vma, int));
static bfd_boolean mn10300_elf_symbol_address_p
PARAMS ((bfd *, asection *, Elf_Internal_Sym *, bfd_vma));
static bfd_boolean elf32_mn10300_finish_hash_table_entry
PARAMS ((struct bfd_hash_entry *, PTR));
static void compute_function_info
PARAMS ((bfd *, struct elf32_mn10300_link_hash_entry *,
bfd_vma, unsigned char *));
static bfd_boolean _bfd_mn10300_elf_create_got_section
PARAMS ((bfd *, struct bfd_link_info *));
static bfd_boolean _bfd_mn10300_elf_create_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
static bfd_boolean _bfd_mn10300_elf_adjust_dynamic_symbol
PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
static bfd_boolean _bfd_mn10300_elf_size_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
static bfd_boolean _bfd_mn10300_elf_finish_dynamic_symbol
PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
Elf_Internal_Sym *));
static bfd_boolean _bfd_mn10300_elf_finish_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
static reloc_howto_type elf_mn10300_howto_table[] = {
HOWTO (R_MN10300_NONE,
0,
2,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_NONE",
FALSE,
0,
0,
FALSE),
HOWTO (R_MN10300_32,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_32",
FALSE,
0xffffffff,
0xffffffff,
FALSE),
HOWTO (R_MN10300_16,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_16",
FALSE,
0xffff,
0xffff,
FALSE),
HOWTO (R_MN10300_8,
0,
0,
8,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_8",
FALSE,
0xff,
0xff,
FALSE),
HOWTO (R_MN10300_PCREL32,
0,
2,
32,
TRUE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_PCREL32",
FALSE,
0xffffffff,
0xffffffff,
TRUE),
HOWTO (R_MN10300_PCREL16,
0,
1,
16,
TRUE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_PCREL16",
FALSE,
0xffff,
0xffff,
TRUE),
HOWTO (R_MN10300_PCREL8,
0,
0,
8,
TRUE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_PCREL8",
FALSE,
0xff,
0xff,
TRUE),
HOWTO (R_MN10300_GNU_VTINHERIT,
0,
0,
0,
FALSE,
0,
complain_overflow_dont,
NULL,
"R_MN10300_GNU_VTINHERIT",
FALSE,
0,
0,
FALSE),
HOWTO (R_MN10300_GNU_VTENTRY,
0,
0,
0,
FALSE,
0,
complain_overflow_dont,
NULL,
"R_MN10300_GNU_VTENTRY",
FALSE,
0,
0,
FALSE),
HOWTO (R_MN10300_24,
0,
2,
24,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_24",
FALSE,
0xffffff,
0xffffff,
FALSE),
HOWTO (R_MN10300_GOTPC32,
0,
2,
32,
TRUE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_GOTPC32",
FALSE,
0xffffffff,
0xffffffff,
TRUE),
HOWTO (R_MN10300_GOTPC16,
0,
1,
16,
TRUE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_GOTPC16",
FALSE,
0xffff,
0xffff,
TRUE),
HOWTO (R_MN10300_GOTOFF32,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_GOTOFF32",
FALSE,
0xffffffff,
0xffffffff,
FALSE),
HOWTO (R_MN10300_GOTOFF24,
0,
2,
24,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_GOTOFF24",
FALSE,
0xffffff,
0xffffff,
FALSE),
HOWTO (R_MN10300_GOTOFF16,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_GOTOFF16",
FALSE,
0xffff,
0xffff,
FALSE),
HOWTO (R_MN10300_PLT32,
0,
2,
32,
TRUE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_PLT32",
FALSE,
0xffffffff,
0xffffffff,
TRUE),
HOWTO (R_MN10300_PLT16,
0,
1,
16,
TRUE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_PLT16",
FALSE,
0xffff,
0xffff,
TRUE),
HOWTO (R_MN10300_GOT32,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_GOT32",
FALSE,
0xffffffff,
0xffffffff,
FALSE),
HOWTO (R_MN10300_GOT24,
0,
2,
24,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_GOT24",
FALSE,
0xffffffff,
0xffffffff,
FALSE),
HOWTO (R_MN10300_GOT16,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_GOT16",
FALSE,
0xffffffff,
0xffffffff,
FALSE),
HOWTO (R_MN10300_COPY,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_COPY",
FALSE,
0xffffffff,
0xffffffff,
FALSE),
HOWTO (R_MN10300_GLOB_DAT,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_GLOB_DAT",
FALSE,
0xffffffff,
0xffffffff,
FALSE),
HOWTO (R_MN10300_JMP_SLOT,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_JMP_SLOT",
FALSE,
0xffffffff,
0xffffffff,
FALSE),
HOWTO (R_MN10300_RELATIVE,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_MN10300_RELATIVE",
FALSE,
0xffffffff,
0xffffffff,
FALSE),
};
struct mn10300_reloc_map {
bfd_reloc_code_real_type 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, },
{ BFD_RELOC_24, R_MN10300_24, },
{ BFD_RELOC_VTABLE_INHERIT, R_MN10300_GNU_VTINHERIT },
{ BFD_RELOC_VTABLE_ENTRY, R_MN10300_GNU_VTENTRY },
{ BFD_RELOC_32_GOT_PCREL, R_MN10300_GOTPC32 },
{ BFD_RELOC_16_GOT_PCREL, R_MN10300_GOTPC16 },
{ BFD_RELOC_32_GOTOFF, R_MN10300_GOTOFF32 },
{ BFD_RELOC_MN10300_GOTOFF24, R_MN10300_GOTOFF24 },
{ BFD_RELOC_16_GOTOFF, R_MN10300_GOTOFF16 },
{ BFD_RELOC_32_PLT_PCREL, R_MN10300_PLT32 },
{ BFD_RELOC_16_PLT_PCREL, R_MN10300_PLT16 },
{ BFD_RELOC_MN10300_GOT32, R_MN10300_GOT32 },
{ BFD_RELOC_MN10300_GOT24, R_MN10300_GOT24 },
{ BFD_RELOC_MN10300_GOT16, R_MN10300_GOT16 },
{ BFD_RELOC_MN10300_COPY, R_MN10300_COPY },
{ BFD_RELOC_MN10300_GLOB_DAT, R_MN10300_GLOB_DAT },
{ BFD_RELOC_MN10300_JMP_SLOT, R_MN10300_JMP_SLOT },
{ BFD_RELOC_MN10300_RELATIVE, R_MN10300_RELATIVE },
};
static bfd_boolean
_bfd_mn10300_elf_create_got_section (abfd, info)
bfd * abfd;
struct bfd_link_info * info;
{
flagword flags;
flagword pltflags;
asection * s;
struct elf_link_hash_entry * h;
const struct elf_backend_data * bed = get_elf_backend_data (abfd);
int ptralign;
if (bfd_get_section_by_name (abfd, ".got") != NULL)
return TRUE;
switch (bed->s->arch_size)
{
case 32:
ptralign = 2;
break;
case 64:
ptralign = 3;
break;
default:
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
| SEC_LINKER_CREATED);
pltflags = flags;
pltflags |= SEC_CODE;
if (bed->plt_not_loaded)
pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
if (bed->plt_readonly)
pltflags |= SEC_READONLY;
s = bfd_make_section_with_flags (abfd, ".plt", pltflags);
if (s == NULL
|| ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
return FALSE;
.plt section. */
if (bed->want_plt_sym)
{
h = _bfd_elf_define_linkage_sym (abfd, info, s,
"_PROCEDURE_LINKAGE_TABLE_");
elf_hash_table (info)->hplt = h;
if (h == NULL)
return FALSE;
}
s = bfd_make_section_with_flags (abfd, ".got", flags);
if (s == NULL
|| ! bfd_set_section_alignment (abfd, s, ptralign))
return FALSE;
if (bed->want_got_plt)
{
s = bfd_make_section_with_flags (abfd, ".got.plt", flags);
if (s == NULL
|| ! bfd_set_section_alignment (abfd, s, ptralign))
return FALSE;
}
(or .got.plt) section. We don't do this in the linker script
because we don't want to define the symbol if we are not creating
a global offset table. */
h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_");
elf_hash_table (info)->hgot = h;
if (h == NULL)
return FALSE;
s->size += bed->got_header_size;
return TRUE;
}
static reloc_howto_type *
bfd_elf32_bfd_reloc_type_lookup (abfd, code)
bfd *abfd ATTRIBUTE_UNUSED;
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;
}
static void
mn10300_info_to_howto (abfd, cache_ptr, dst)
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_MN10300_MAX);
cache_ptr->howto = &elf_mn10300_howto_table[r_type];
}
Since we don't do .gots or .plts, we just need to consider the
virtual table relocs for gc. */
static bfd_boolean
mn10300_elf_check_relocs (abfd, info, sec, 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, **sym_hashes_end;
const Elf_Internal_Rela *rel;
const Elf_Internal_Rela *rel_end;
bfd * dynobj;
bfd_vma * local_got_offsets;
asection * sgot;
asection * srelgot;
asection * sreloc;
sgot = NULL;
srelgot = NULL;
sreloc = NULL;
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;
dynobj = elf_hash_table (info)->dynobj;
local_got_offsets = elf_local_got_offsets (abfd);
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;
}
if (dynobj == NULL)
{
switch (ELF32_R_TYPE (rel->r_info))
{
case R_MN10300_GOT32:
case R_MN10300_GOT24:
case R_MN10300_GOT16:
case R_MN10300_GOTOFF32:
case R_MN10300_GOTOFF24:
case R_MN10300_GOTOFF16:
case R_MN10300_GOTPC32:
case R_MN10300_GOTPC16:
elf_hash_table (info)->dynobj = dynobj = abfd;
if (! _bfd_mn10300_elf_create_got_section (dynobj, info))
return FALSE;
break;
default:
break;
}
}
switch (ELF32_R_TYPE (rel->r_info))
{
Reconstruct it for later use during GC. */
case R_MN10300_GNU_VTINHERIT:
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
return FALSE;
break;
used. Record for later use during GC. */
case R_MN10300_GNU_VTENTRY:
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
return FALSE;
break;
case R_MN10300_GOT32:
case R_MN10300_GOT24:
case R_MN10300_GOT16:
if (sgot == NULL)
{
sgot = bfd_get_section_by_name (dynobj, ".got");
BFD_ASSERT (sgot != NULL);
}
if (srelgot == NULL
&& (h != NULL || info->shared))
{
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
if (srelgot == NULL)
{
srelgot = bfd_make_section_with_flags (dynobj,
".rela.got",
(SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
| SEC_READONLY));
if (srelgot == NULL
|| ! bfd_set_section_alignment (dynobj, srelgot, 2))
return FALSE;
}
}
if (h != NULL)
{
if (h->got.offset != (bfd_vma) -1)
break;
h->got.offset = sgot->size;
if (h->dynindx == -1)
{
if (! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
}
srelgot->size += sizeof (Elf32_External_Rela);
}
else
{
symbol. */
if (local_got_offsets == NULL)
{
size_t size;
unsigned int i;
size = symtab_hdr->sh_info * sizeof (bfd_vma);
local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
if (local_got_offsets == NULL)
return FALSE;
elf_local_got_offsets (abfd) = local_got_offsets;
for (i = 0; i < symtab_hdr->sh_info; i++)
local_got_offsets[i] = (bfd_vma) -1;
}
if (local_got_offsets[r_symndx] != (bfd_vma) -1)
break;
local_got_offsets[r_symndx] = sgot->size;
if (info->shared)
output a R_MN10300_RELATIVE reloc so that the dynamic
linker can adjust this GOT entry. */
srelgot->size += sizeof (Elf32_External_Rela);
}
sgot->size += 4;
break;
case R_MN10300_PLT32:
case R_MN10300_PLT16:
actually build the entry in adjust_dynamic_symbol,
because this might be a case of linking PIC code which is
never referenced by a dynamic object, in which case we
don't need to generate a procedure linkage table entry
after all. */
creating a procedure linkage table entry. */
if (h == NULL)
continue;
if (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
|| ELF_ST_VISIBILITY (h->other) == STV_HIDDEN)
break;
h->needs_plt = 1;
break;
case R_MN10300_24:
case R_MN10300_16:
case R_MN10300_8:
case R_MN10300_PCREL32:
case R_MN10300_PCREL16:
case R_MN10300_PCREL8:
if (h != NULL)
h->non_got_ref = 1;
break;
case R_MN10300_32:
if (h != NULL)
h->non_got_ref = 1;
the reloc into the shared library. */
if (info->shared
&& (sec->flags & SEC_ALLOC) != 0)
{
reloc types into the output file. We create a reloc
section in dynobj and make room for this reloc. */
if (sreloc == NULL)
{
const char * name;
name = (bfd_elf_string_from_elf_section
(abfd,
elf_elfheader (abfd)->e_shstrndx,
elf_section_data (sec)->rel_hdr.sh_name));
if (name == NULL)
return FALSE;
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
&& strcmp (bfd_get_section_name (abfd, sec),
name + 5) == 0);
sreloc = bfd_get_section_by_name (dynobj, name);
if (sreloc == NULL)
{
flagword flags;
flags = (SEC_HAS_CONTENTS | SEC_READONLY
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
if ((sec->flags & SEC_ALLOC) != 0)
flags |= SEC_ALLOC | SEC_LOAD;
sreloc = bfd_make_section_with_flags (dynobj,
name,
flags);
if (sreloc == NULL
|| ! bfd_set_section_alignment (dynobj, sreloc, 2))
return FALSE;
}
}
sreloc->size += sizeof (Elf32_External_Rela);
}
break;
}
}
return TRUE;
}
relocation. */
static asection *
mn10300_elf_gc_mark_hook (sec, info, rel, h, sym)
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)
{
switch (ELF32_R_TYPE (rel->r_info))
{
case R_MN10300_GNU_VTINHERIT:
case R_MN10300_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;
}
}
}
else
return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
return NULL;
}
static bfd_reloc_status_type
mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
input_section, contents, offset, value,
addend, h, symndx, info, sym_sec, is_local)
reloc_howto_type *howto;
bfd *input_bfd;
bfd *output_bfd ATTRIBUTE_UNUSED;
asection *input_section;
bfd_byte *contents;
bfd_vma offset;
bfd_vma value;
bfd_vma addend;
struct elf_link_hash_entry * h;
unsigned long symndx;
struct bfd_link_info *info;
asection *sym_sec ATTRIBUTE_UNUSED;
int is_local ATTRIBUTE_UNUSED;
{
unsigned long r_type = howto->type;
bfd_byte *hit_data = contents + offset;
bfd * dynobj;
bfd_vma * local_got_offsets;
asection * sgot;
asection * splt;
asection * sreloc;
dynobj = elf_hash_table (info)->dynobj;
local_got_offsets = elf_local_got_offsets (input_bfd);
sgot = NULL;
splt = NULL;
sreloc = NULL;
switch (r_type)
{
case R_MN10300_24:
case R_MN10300_16:
case R_MN10300_8:
case R_MN10300_PCREL8:
case R_MN10300_PCREL16:
case R_MN10300_PCREL32:
case R_MN10300_GOTOFF32:
case R_MN10300_GOTOFF24:
case R_MN10300_GOTOFF16:
if (info->shared
&& (input_section->flags & SEC_ALLOC) != 0
&& h != NULL
&& ! SYMBOL_REFERENCES_LOCAL (info, h))
return bfd_reloc_dangerous;
}
switch (r_type)
{
case R_MN10300_NONE:
return bfd_reloc_ok;
case R_MN10300_32:
if (info->shared
&& (input_section->flags & SEC_ALLOC) != 0)
{
Elf_Internal_Rela outrel;
bfd_boolean skip, relocate;
copied into the output file to be resolved at run
time. */
if (sreloc == NULL)
{
const char * name;
name = (bfd_elf_string_from_elf_section
(input_bfd,
elf_elfheader (input_bfd)->e_shstrndx,
elf_section_data (input_section)->rel_hdr.sh_name));
if (name == NULL)
return FALSE;
BFD_ASSERT (strncmp (name, ".rela", 5) == 0
&& strcmp (bfd_get_section_name (input_bfd,
input_section),
name + 5) == 0);
sreloc = bfd_get_section_by_name (dynobj, name);
BFD_ASSERT (sreloc != NULL);
}
skip = FALSE;
outrel.r_offset = _bfd_elf_section_offset (input_bfd, info,
input_section, offset);
if (outrel.r_offset == (bfd_vma) -1)
skip = TRUE;
outrel.r_offset += (input_section->output_section->vma
+ input_section->output_offset);
if (skip)
{
memset (&outrel, 0, sizeof outrel);
relocate = FALSE;
}
else
{
become local. */
if (h == NULL
|| SYMBOL_REFERENCES_LOCAL (info, h))
{
relocate = TRUE;
outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
outrel.r_addend = value + addend;
}
else
{
BFD_ASSERT (h->dynindx != -1);
relocate = FALSE;
outrel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_32);
outrel.r_addend = value + addend;
}
}
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
(bfd_byte *) (((Elf32_External_Rela *) sreloc->contents)
+ sreloc->reloc_count));
++sreloc->reloc_count;
not want to fiddle with the addend. Otherwise, we
need to include the symbol value so that it becomes
an addend for the dynamic reloc. */
if (! relocate)
return bfd_reloc_ok;
}
value += addend;
bfd_put_32 (input_bfd, value, hit_data);
return bfd_reloc_ok;
case R_MN10300_24:
value += addend;
if ((long) value > 0x7fffff || (long) value < -0x800000)
return bfd_reloc_overflow;
bfd_put_8 (input_bfd, value & 0xff, hit_data);
bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
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 > 0x7f || (long) value < -0x80)
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;
case R_MN10300_GNU_VTINHERIT:
case R_MN10300_GNU_VTENTRY:
return bfd_reloc_ok;
case R_MN10300_GOTPC32:
value = bfd_get_section_by_name (dynobj,
".got")->output_section->vma;
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;
case R_MN10300_GOTPC16:
value = bfd_get_section_by_name (dynobj,
".got")->output_section->vma;
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_GOTOFF32:
value -= bfd_get_section_by_name (dynobj,
".got")->output_section->vma;
value += addend;
bfd_put_32 (input_bfd, value, hit_data);
return bfd_reloc_ok;
case R_MN10300_GOTOFF24:
value -= bfd_get_section_by_name (dynobj,
".got")->output_section->vma;
value += addend;
if ((long) value > 0x7fffff || (long) value < -0x800000)
return bfd_reloc_overflow;
bfd_put_8 (input_bfd, value, hit_data);
bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
return bfd_reloc_ok;
case R_MN10300_GOTOFF16:
value -= bfd_get_section_by_name (dynobj,
".got")->output_section->vma;
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_PLT32:
if (h != NULL
&& ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
&& ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
&& h->plt.offset != (bfd_vma) -1)
{
asection * splt;
splt = bfd_get_section_by_name (dynobj, ".plt");
value = (splt->output_section->vma
+ splt->output_offset
+ h->plt.offset) - value;
}
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;
case R_MN10300_PLT16:
if (h != NULL
&& ELF_ST_VISIBILITY (h->other) != STV_INTERNAL
&& ELF_ST_VISIBILITY (h->other) != STV_HIDDEN
&& h->plt.offset != (bfd_vma) -1)
{
asection * splt;
splt = bfd_get_section_by_name (dynobj, ".plt");
value = (splt->output_section->vma
+ splt->output_offset
+ h->plt.offset) - value;
}
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_GOT32:
case R_MN10300_GOT24:
case R_MN10300_GOT16:
{
asection * sgot;
sgot = bfd_get_section_by_name (dynobj, ".got");
if (h != NULL)
{
bfd_vma off;
off = h->got.offset;
BFD_ASSERT (off != (bfd_vma) -1);
if (! elf_hash_table (info)->dynamic_sections_created
|| SYMBOL_REFERENCES_LOCAL (info, h))
-Bsymbolic link and the symbol is defined
locally, or the symbol was forced to be local
because of a version file. We must initialize
this entry in the global offset table.
When doing a dynamic link, we create a .rela.got
relocation entry to initialize the value. This
is done in the finish_dynamic_symbol routine. */
bfd_put_32 (output_bfd, value,
sgot->contents + off);
value = sgot->output_offset + off;
}
else
{
bfd_vma off;
off = elf_local_got_offsets (input_bfd)[symndx];
bfd_put_32 (output_bfd, value, sgot->contents + off);
if (info->shared)
{
asection * srelgot;
Elf_Internal_Rela outrel;
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
BFD_ASSERT (srelgot != NULL);
outrel.r_offset = (sgot->output_section->vma
+ sgot->output_offset
+ off);
outrel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
outrel.r_addend = value;
bfd_elf32_swap_reloca_out (output_bfd, &outrel,
(bfd_byte *) (((Elf32_External_Rela *)
srelgot->contents)
+ srelgot->reloc_count));
++ srelgot->reloc_count;
}
value = sgot->output_offset + off;
}
}
value += addend;
if (r_type == R_MN10300_GOT32)
{
bfd_put_32 (input_bfd, value, hit_data);
return bfd_reloc_ok;
}
else if (r_type == R_MN10300_GOT24)
{
if ((long) value > 0x7fffff || (long) value < -0x800000)
return bfd_reloc_overflow;
bfd_put_8 (input_bfd, value & 0xff, hit_data);
bfd_put_8 (input_bfd, (value >> 8) & 0xff, hit_data + 1);
bfd_put_8 (input_bfd, (value >> 16) & 0xff, hit_data + 2);
return bfd_reloc_ok;
}
else if (r_type == R_MN10300_GOT16)
{
if ((long) value > 0xffff || (long) value < -0x10000)
return bfd_reloc_overflow;
bfd_put_16 (input_bfd, value, hit_data);
return bfd_reloc_ok;
}
default:
return bfd_reloc_notsupported;
}
}
static bfd_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;
if (info->relocatable)
return TRUE;
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 elf32_mn10300_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 (r_type == R_MN10300_GNU_VTINHERIT
|| r_type == R_MN10300_GNU_VTENTRY)
continue;
h = NULL;
sym = NULL;
sec = NULL;
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);
}
else
{
bfd_boolean unresolved_reloc;
bfd_boolean warned;
struct elf_link_hash_entry *hh;
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
r_symndx, symtab_hdr, sym_hashes,
hh, sec, relocation,
unresolved_reloc, warned);
h = (struct elf32_mn10300_link_hash_entry *) hh;
if ((h->root.root.type == bfd_link_hash_defined
|| h->root.root.type == bfd_link_hash_defweak)
&& ( r_type == R_MN10300_GOTPC32
|| r_type == R_MN10300_GOTPC16
|| (( r_type == R_MN10300_PLT32
|| r_type == R_MN10300_PLT16)
&& ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
&& ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
&& h->root.plt.offset != (bfd_vma) -1)
|| (( r_type == R_MN10300_GOT32
|| r_type == R_MN10300_GOT24
|| r_type == R_MN10300_GOT16)
&& elf_hash_table (info)->dynamic_sections_created
&& !SYMBOL_REFERENCES_LOCAL (info, hh))
|| (r_type == R_MN10300_32
&& !SYMBOL_REFERENCES_LOCAL (info, hh)
&& ((input_section->flags & SEC_ALLOC) != 0
in its sections against symbols defined
externally in shared libraries. We can't
do anything with them here. */
|| ((input_section->flags & SEC_DEBUGGING) != 0
&& h->root.def_dynamic)))))
value. We check specially because in some
obscure cases sec->output_section will be NULL. */
relocation = 0;
else if (unresolved_reloc)
(*_bfd_error_handler)
(_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
input_bfd,
input_section,
(long) rel->r_offset,
howto->name,
h->root.root.root.string);
}
r = mn10300_elf_final_link_relocate (howto, input_bfd, output_bfd,
input_section,
contents, rel->r_offset,
relocation, rel->r_addend,
(struct elf_link_hash_entry *)h,
r_symndx,
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.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, (h ? &h->root.root : NULL), 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, TRUE)))
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");
common_error:
if (!((*info->callbacks->warning)
(info, msg, name, input_bfd, input_section,
rel->r_offset)))
return FALSE;
break;
}
}
}
return TRUE;
}
static bfd_boolean
elf32_mn10300_finish_hash_table_entry (gen_entry, in_args)
struct bfd_hash_entry *gen_entry;
PTR in_args;
{
struct elf32_mn10300_link_hash_entry *entry;
struct bfd_link_info *link_info = (struct bfd_link_info *)in_args;
unsigned int byte_count = 0;
entry = (struct elf32_mn10300_link_hash_entry *) gen_entry;
if (entry->root.root.type == bfd_link_hash_warning)
entry = (struct elf32_mn10300_link_hash_entry *) entry->root.root.u.i.link;
to this symbol, then return now. */
if (entry->flags == MN10300_CONVERT_CALL_TO_CALLS)
return TRUE;
can move from the function itself into the "call" instruction,
then note that all "call" instructions should be converted into
"calls" instructions and return. If a symbol is available for
dynamic symbol resolution (overridable or overriding), avoid
custom calling conventions. */
if (entry->direct_calls == 0
|| (entry->stack_size == 0 && entry->movm_args == 0)
|| (elf_hash_table (link_info)->dynamic_sections_created
&& ELF_ST_VISIBILITY (entry->root.other) != STV_INTERNAL
&& ELF_ST_VISIBILITY (entry->root.other) != STV_HIDDEN))
{
instructions for calls to this symbol. */
entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
return TRUE;
}
the "call" instruction. Count how many bytes we might be able to
eliminate in the function itself. */
if (entry->movm_args)
byte_count += 2;
if (entry->stack_size > 0)
{
if (entry->stack_size <= 128)
byte_count += 3;
else
byte_count += 4;
}
the associated "call" instructions into "calls" instructions. */
if (byte_count < entry->direct_calls)
entry->flags |= MN10300_CONVERT_CALL_TO_CALLS;
return TRUE;
}
There are quite a few relaxing opportunities available on the mn10300:
* calls:32 -> calls:16 2 bytes
* call:32 -> call:16 2 bytes
* call:32 -> calls:32 1 byte
* call:16 -> calls:16 1 byte
* These are done anytime using "calls" would result
in smaller code, or when necessary to preserve the
meaning of the program.
* call:32 varies
* call:16
* In some circumstances we can move instructions
from a function prologue into a "call" instruction.
This is only done if the resulting code is no larger
than the original code.
* jmp:32 -> jmp:16 2 bytes
* jmp:16 -> bra:8 1 byte
* If the previous instruction is a conditional branch
around the jump/bra, we may be able to reverse its condition
and change its target to the jump's target. The jump/bra
can then be deleted. 2 bytes
* mov abs32 -> mov abs16 1 or 2 bytes
* Most instructions which accept imm32 can relax to imm16 1 or 2 bytes
- Most instructions which accept imm16 can relax to imm8 1 or 2 bytes
* Most instructions which accept d32 can relax to d16 1 or 2 bytes
- Most instructions which accept d16 can relax to d8 1 or 2 bytes
We don't handle imm16->imm8 or d16->d8 as they're very rare
and somewhat more difficult to support. */
static bfd_boolean
mn10300_elf_relax_section (abfd, sec, link_info, again)
bfd *abfd;
asection *sec;
struct bfd_link_info *link_info;
bfd_boolean *again;
{
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Rela *internal_relocs = NULL;
Elf_Internal_Rela *irel, *irelend;
bfd_byte *contents = NULL;
Elf_Internal_Sym *isymbuf = NULL;
struct elf32_mn10300_link_hash_table *hash_table;
asection *section = sec;
*again = FALSE;
hash_table = elf32_mn10300_hash_table (link_info);
if ((hash_table->flags & MN10300_HASH_ENTRIES_INITIALIZED) == 0)
{
bfd *input_bfd;
for (input_bfd = link_info->input_bfds;
input_bfd != NULL;
input_bfd = input_bfd->link_next)
{
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
if (symtab_hdr->sh_info != 0)
{
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
if (isymbuf == NULL)
isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
symtab_hdr->sh_info, 0,
NULL, NULL, NULL);
if (isymbuf == NULL)
goto error_return;
}
for (section = input_bfd->sections;
section != NULL;
section = section->next)
{
struct elf32_mn10300_link_hash_entry *hash;
Elf_Internal_Sym *sym;
asection *sym_sec = NULL;
const char *sym_name;
char *new_name;
if (! (((section->flags & SEC_RELOC) != 0
&& section->reloc_count != 0)
|| (section->flags & SEC_CODE) != 0))
continue;
if (elf_section_data (section)->this_hdr.contents != NULL)
contents = elf_section_data (section)->this_hdr.contents;
else if (section->size != 0)
{
if (!bfd_malloc_and_get_section (input_bfd, section,
&contents))
goto error_return;
}
else
contents = NULL;
if ((section->flags & SEC_RELOC) != 0
&& section->reloc_count != 0)
{
internal_relocs = (_bfd_elf_link_read_relocs
(input_bfd, section, (PTR) NULL,
(Elf_Internal_Rela *) NULL,
link_info->keep_memory));
if (internal_relocs == NULL)
goto error_return;
irel = internal_relocs;
irelend = irel + section->reloc_count;
for (; irel < irelend; irel++)
{
long r_type;
unsigned long r_index;
unsigned char code;
r_type = ELF32_R_TYPE (irel->r_info);
r_index = ELF32_R_SYM (irel->r_info);
if (r_type < 0 || r_type >= (int) R_MN10300_MAX)
goto error_return;
symbol! */
hash = NULL;
sym = NULL;
sym_sec = NULL;
if (r_index < symtab_hdr->sh_info)
{
Elf_Internal_Sym *isym;
struct elf_link_hash_table *elftab;
bfd_size_type amt;
isym = isymbuf + r_index;
if (isym->st_shndx == SHN_UNDEF)
sym_sec = bfd_und_section_ptr;
else if (isym->st_shndx == SHN_ABS)
sym_sec = bfd_abs_section_ptr;
else if (isym->st_shndx == SHN_COMMON)
sym_sec = bfd_com_section_ptr;
else
sym_sec
= bfd_section_from_elf_index (input_bfd,
isym->st_shndx);
sym_name
= bfd_elf_string_from_elf_section (input_bfd,
(symtab_hdr
->sh_link),
isym->st_name);
about it. */
if (ELF_ST_TYPE (isym->st_info) != STT_FUNC)
continue;
local symbol in the global hash table. */
amt = strlen (sym_name) + 10;
new_name = bfd_malloc (amt);
if (new_name == 0)
goto error_return;
sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
sym_name = new_name;
elftab = &hash_table->static_hash_table->root;
hash = ((struct elf32_mn10300_link_hash_entry *)
elf_link_hash_lookup (elftab, sym_name,
TRUE, TRUE, FALSE));
free (new_name);
}
else
{
r_index -= symtab_hdr->sh_info;
hash = (struct elf32_mn10300_link_hash_entry *)
elf_sym_hashes (input_bfd)[r_index];
}
should convert "call" instructions to "calls"
instructions. */
code = bfd_get_8 (input_bfd,
contents + irel->r_offset - 1);
if (code != 0xdd && code != 0xcd)
hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
direct_calls counter. Else force "call" to
"calls" conversions. */
if (r_type == R_MN10300_PCREL32
|| r_type == R_MN10300_PLT32
|| r_type == R_MN10300_PLT16
|| r_type == R_MN10300_PCREL16)
hash->direct_calls++;
else
hash->flags |= MN10300_CONVERT_CALL_TO_CALLS;
}
}
and a list of what registers were saved in the prologue
(ie movm_args). */
if ((section->flags & SEC_CODE) != 0)
{
Elf_Internal_Sym *isym, *isymend;
unsigned int sec_shndx;
struct elf_link_hash_entry **hashes;
struct elf_link_hash_entry **end_hashes;
unsigned int symcount;
sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
section);
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
- symtab_hdr->sh_info);
hashes = elf_sym_hashes (input_bfd);
end_hashes = hashes + symcount;
update info for that function. */
isymend = isymbuf + symtab_hdr->sh_info;
for (isym = isymbuf; isym < isymend; isym++)
{
if (isym->st_shndx == sec_shndx
&& ELF_ST_TYPE (isym->st_info) == STT_FUNC)
{
struct elf_link_hash_table *elftab;
bfd_size_type amt;
struct elf_link_hash_entry **lhashes = hashes;
global one. */
for (; lhashes < end_hashes; lhashes++)
{
hash = (struct elf32_mn10300_link_hash_entry *) *lhashes;
if ((hash->root.root.type == bfd_link_hash_defined
|| hash->root.root.type == bfd_link_hash_defweak)
&& hash->root.root.u.def.section == section
&& hash->root.type == STT_FUNC
&& hash->root.root.u.def.value == isym->st_value)
break;
}
if (lhashes != end_hashes)
continue;
if (isym->st_shndx == SHN_UNDEF)
sym_sec = bfd_und_section_ptr;
else if (isym->st_shndx == SHN_ABS)
sym_sec = bfd_abs_section_ptr;
else if (isym->st_shndx == SHN_COMMON)
sym_sec = bfd_com_section_ptr;
else
sym_sec
= bfd_section_from_elf_index (input_bfd,
isym->st_shndx);
sym_name = (bfd_elf_string_from_elf_section
(input_bfd, symtab_hdr->sh_link,
isym->st_name));
local symbol in the global hash table. */
amt = strlen (sym_name) + 10;
new_name = bfd_malloc (amt);
if (new_name == 0)
goto error_return;
sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
sym_name = new_name;
elftab = &hash_table->static_hash_table->root;
hash = ((struct elf32_mn10300_link_hash_entry *)
elf_link_hash_lookup (elftab, sym_name,
TRUE, TRUE, FALSE));
free (new_name);
compute_function_info (input_bfd, hash,
isym->st_value, contents);
}
}
for (; hashes < end_hashes; hashes++)
{
hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
if ((hash->root.root.type == bfd_link_hash_defined
|| hash->root.root.type == bfd_link_hash_defweak)
&& hash->root.root.u.def.section == section
&& hash->root.type == STT_FUNC)
compute_function_info (input_bfd, hash,
(hash)->root.root.u.def.value,
contents);
}
}
if (internal_relocs != NULL
&& elf_section_data (section)->relocs != internal_relocs)
free (internal_relocs);
internal_relocs = NULL;
if (contents != NULL
&& elf_section_data (section)->this_hdr.contents != contents)
{
if (! link_info->keep_memory)
free (contents);
else
{
elf_section_data (section)->this_hdr.contents = contents;
}
}
contents = NULL;
}
if (isymbuf != NULL
&& symtab_hdr->contents != (unsigned char *) isymbuf)
{
if (! link_info->keep_memory)
free (isymbuf);
else
{
symtab_hdr->contents = (unsigned char *) isymbuf;
}
}
isymbuf = NULL;
}
the final initialization steps on each. */
elf32_mn10300_link_hash_traverse (hash_table,
elf32_mn10300_finish_hash_table_entry,
link_info);
elf32_mn10300_link_hash_traverse (hash_table->static_hash_table,
elf32_mn10300_finish_hash_table_entry,
link_info);
hash_table->flags |= MN10300_HASH_ENTRIES_INITIALIZED;
code section and delete any prologue insns which will be
redundant because their operations will be performed by
a "call" instruction. */
for (input_bfd = link_info->input_bfds;
input_bfd != NULL;
input_bfd = input_bfd->link_next)
{
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
if (symtab_hdr->sh_info != 0)
{
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
if (isymbuf == NULL)
isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
symtab_hdr->sh_info, 0,
NULL, NULL, NULL);
if (isymbuf == NULL)
goto error_return;
}
for (section = input_bfd->sections;
section != NULL;
section = section->next)
{
unsigned int sec_shndx;
Elf_Internal_Sym *isym, *isymend;
struct elf_link_hash_entry **hashes;
struct elf_link_hash_entry **end_hashes;
unsigned int symcount;
if ((section->flags & SEC_CODE) == 0 || section->size == 0)
continue;
if (section->reloc_count != 0)
{
internal_relocs = (_bfd_elf_link_read_relocs
(input_bfd, section, (PTR) NULL,
(Elf_Internal_Rela *) NULL,
link_info->keep_memory));
if (internal_relocs == NULL)
goto error_return;
}
if (elf_section_data (section)->this_hdr.contents != NULL)
contents = elf_section_data (section)->this_hdr.contents;
else
{
if (!bfd_malloc_and_get_section (input_bfd, section,
&contents))
goto error_return;
}
sec_shndx = _bfd_elf_section_from_bfd_section (input_bfd,
section);
insns deleted from its prologue. */
isymend = isymbuf + symtab_hdr->sh_info;
for (isym = isymbuf; isym < isymend; isym++)
{
struct elf32_mn10300_link_hash_entry *sym_hash;
asection *sym_sec = NULL;
const char *sym_name;
char *new_name;
struct elf_link_hash_table *elftab;
bfd_size_type amt;
if (isym->st_shndx != sec_shndx)
continue;
if (isym->st_shndx == SHN_UNDEF)
sym_sec = bfd_und_section_ptr;
else if (isym->st_shndx == SHN_ABS)
sym_sec = bfd_abs_section_ptr;
else if (isym->st_shndx == SHN_COMMON)
sym_sec = bfd_com_section_ptr;
else
sym_sec
= bfd_section_from_elf_index (input_bfd, isym->st_shndx);
sym_name
= bfd_elf_string_from_elf_section (input_bfd,
symtab_hdr->sh_link,
isym->st_name);
local symbol in the global hash table. */
amt = strlen (sym_name) + 10;
new_name = bfd_malloc (amt);
if (new_name == 0)
goto error_return;
sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
sym_name = new_name;
elftab = &hash_table->static_hash_table->root;
sym_hash = ((struct elf32_mn10300_link_hash_entry *)
elf_link_hash_lookup (elftab, sym_name,
FALSE, FALSE, FALSE));
free (new_name);
if (sym_hash == NULL)
continue;
if (! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
&& ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
{
int bytes = 0;
elf_section_data (section)->relocs = internal_relocs;
elf_section_data (section)->this_hdr.contents = contents;
symtab_hdr->contents = (unsigned char *) isymbuf;
if (sym_hash->movm_args)
bytes += 2;
if (sym_hash->stack_size > 0)
{
if (sym_hash->stack_size <= 128)
bytes += 3;
else
bytes += 4;
}
function. */
sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
if (!mn10300_elf_relax_delete_bytes (input_bfd,
section,
isym->st_value,
bytes))
goto error_return;
may lead to more relaxing opportunities. */
*again = TRUE;
}
}
need insns deleted from their prologues. */
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
- symtab_hdr->sh_info);
hashes = elf_sym_hashes (input_bfd);
end_hashes = hashes + symcount;
for (; hashes < end_hashes; hashes++)
{
struct elf32_mn10300_link_hash_entry *sym_hash;
sym_hash = (struct elf32_mn10300_link_hash_entry *) *hashes;
if ((sym_hash->root.root.type == bfd_link_hash_defined
|| sym_hash->root.root.type == bfd_link_hash_defweak)
&& sym_hash->root.root.u.def.section == section
&& ! (sym_hash->flags & MN10300_CONVERT_CALL_TO_CALLS)
&& ! (sym_hash->flags & MN10300_DELETED_PROLOGUE_BYTES))
{
int bytes = 0;
bfd_vma symval;
elf_section_data (section)->relocs = internal_relocs;
elf_section_data (section)->this_hdr.contents = contents;
symtab_hdr->contents = (unsigned char *) isymbuf;
if (sym_hash->movm_args)
bytes += 2;
if (sym_hash->stack_size > 0)
{
if (sym_hash->stack_size <= 128)
bytes += 3;
else
bytes += 4;
}
function. */
sym_hash->flags |= MN10300_DELETED_PROLOGUE_BYTES;
symval = sym_hash->root.root.u.def.value;
if (!mn10300_elf_relax_delete_bytes (input_bfd,
section,
symval,
bytes))
goto error_return;
may lead to more relaxing opportunities. */
*again = TRUE;
}
}
if (internal_relocs != NULL
&& elf_section_data (section)->relocs != internal_relocs)
free (internal_relocs);
internal_relocs = NULL;
if (contents != NULL
&& elf_section_data (section)->this_hdr.contents != contents)
{
if (! link_info->keep_memory)
free (contents);
else
{
elf_section_data (section)->this_hdr.contents = contents;
}
}
contents = NULL;
}
if (isymbuf != NULL
&& symtab_hdr->contents != (unsigned char *) isymbuf)
{
if (! link_info->keep_memory)
free (isymbuf);
else
{
symtab_hdr->contents = (unsigned char *) isymbuf;
}
}
isymbuf = NULL;
}
}
contents = NULL;
internal_relocs = NULL;
isymbuf = NULL;
section = sec;
this section does not have relocs, or if this is not a
code section. */
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;
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;
irelend = internal_relocs + sec->reloc_count;
for (irel = internal_relocs; irel < irelend; irel++)
{
bfd_vma symval;
struct elf32_mn10300_link_hash_entry *h = NULL;
this reloc. */
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_NONE
|| ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_8
|| ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_MAX)
continue;
if (contents == NULL)
{
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 (isymbuf == NULL && symtab_hdr->sh_info != 0)
{
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
if (isymbuf == NULL)
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
symtab_hdr->sh_info, 0,
NULL, NULL, NULL);
if (isymbuf == NULL)
goto error_return;
}
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
{
Elf_Internal_Sym *isym;
asection *sym_sec = NULL;
const char *sym_name;
char *new_name;
bfd_vma saved_addend;
isym = isymbuf + ELF32_R_SYM (irel->r_info);
if (isym->st_shndx == SHN_UNDEF)
sym_sec = bfd_und_section_ptr;
else if (isym->st_shndx == SHN_ABS)
sym_sec = bfd_abs_section_ptr;
else if (isym->st_shndx == SHN_COMMON)
sym_sec = bfd_com_section_ptr;
else
sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
sym_name = bfd_elf_string_from_elf_section (abfd,
symtab_hdr->sh_link,
isym->st_name);
if ((sym_sec->flags & SEC_MERGE)
&& ELF_ST_TYPE (isym->st_info) == STT_SECTION
&& sym_sec->sec_info_type == ELF_INFO_TYPE_MERGE)
{
saved_addend = irel->r_addend;
symval = _bfd_elf_rela_local_sym (abfd, isym, &sym_sec, irel);
symval += irel->r_addend;
irel->r_addend = saved_addend;
}
else
{
symval = (isym->st_value
+ sym_sec->output_section->vma
+ sym_sec->output_offset);
}
local symbol in the global hash table. */
new_name = bfd_malloc ((bfd_size_type) strlen (sym_name) + 10);
if (new_name == 0)
goto error_return;
sprintf (new_name, "%s_%08x", sym_name, sym_sec->id);
sym_name = new_name;
h = (struct elf32_mn10300_link_hash_entry *)
elf_link_hash_lookup (&hash_table->static_hash_table->root,
sym_name, FALSE, FALSE, FALSE);
free (new_name);
}
else
{
unsigned long indx;
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
h = (struct elf32_mn10300_link_hash_entry *)
(elf_sym_hashes (abfd)[indx]);
BFD_ASSERT (h != NULL);
if (h->root.root.type != bfd_link_hash_defined
&& h->root.root.type != bfd_link_hash_defweak)
{
symbol. Just ignore it--it will be caught by the
regular reloc processing. */
continue;
}
symval = (h->root.root.u.def.value
+ h->root.root.u.def.section->output_section->vma
+ h->root.root.u.def.section->output_offset);
}
contents, the section relocs, and the BFD symbol table. We
must tell the rest of the code not to free up this
information. It would be possible to instead create a table
of changes which have to be made, as is done in coff-mips.c;
that would be more work, but would require less memory when
the linker is run. */
branch/call, also deal with "call" -> "calls" conversions and
insertion of prologue data into "call" instructions. */
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL32
|| ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32)
{
bfd_vma value = symval;
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PLT32
&& h != NULL
&& ELF_ST_VISIBILITY (h->root.other) != STV_INTERNAL
&& ELF_ST_VISIBILITY (h->root.other) != STV_HIDDEN
&& h->root.plt.offset != (bfd_vma) -1)
{
asection * splt;
splt = bfd_get_section_by_name (elf_hash_table (link_info)
->dynobj, ".plt");
value = ((splt->output_section->vma
+ splt->output_offset
+ h->root.plt.offset)
- (sec->output_section->vma
+ sec->output_offset
+ irel->r_offset));
}
into a "calls" instruction, do so now. It saves a byte. */
if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
{
unsigned char code;
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
if (code == 0xdd)
{
etc. */
elf_section_data (sec)->relocs = internal_relocs;
elf_section_data (sec)->this_hdr.contents = contents;
symtab_hdr->contents = (unsigned char *) isymbuf;
bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 1);
bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
irel->r_offset += 1;
irel->r_addend += 1;
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
irel->r_offset + 3, 1))
goto error_return;
Note that this is not required, and it may be slow. */
*again = TRUE;
}
}
else if (h)
{
from target function filled in. */
unsigned char code;
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
instruction if needed. */
if (code == 0xdd)
{
bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 4);
bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
contents + irel->r_offset + 5);
}
}
value -= (sec->output_section->vma + sec->output_offset);
value -= irel->r_offset;
value += irel->r_addend;
0x7fff + 2 as the target will be two bytes closer if we are
able to relax. */
if ((long) value < 0x8001 && (long) value > -0x8000)
{
unsigned char code;
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
if (code != 0xdc && code != 0xdd && code != 0xff)
continue;
elf_section_data (sec)->relocs = internal_relocs;
elf_section_data (sec)->this_hdr.contents = contents;
symtab_hdr->contents = (unsigned char *) isymbuf;
if (code == 0xdc)
bfd_put_8 (abfd, 0xcc, contents + irel->r_offset - 1);
else if (code == 0xdd)
bfd_put_8 (abfd, 0xcd, contents + irel->r_offset - 1);
else if (code == 0xff)
bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
(ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_PLT32)
? R_MN10300_PLT16 :
R_MN10300_PCREL16);
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
irel->r_offset + 1, 2))
goto error_return;
Note that this is not required, and it may be slow. */
*again = TRUE;
}
}
branch. */
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL16)
{
bfd_vma value = symval;
into a "calls" instruction, do so now. It saves a byte. */
if (h && (h->flags & MN10300_CONVERT_CALL_TO_CALLS))
{
unsigned char code;
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
if (code == 0xcd)
{
etc. */
elf_section_data (sec)->relocs = internal_relocs;
elf_section_data (sec)->this_hdr.contents = contents;
symtab_hdr->contents = (unsigned char *) isymbuf;
bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 1);
bfd_put_8 (abfd, 0xff, contents + irel->r_offset);
irel->r_offset += 1;
irel->r_addend += 1;
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
irel->r_offset + 1, 1))
goto error_return;
Note that this is not required, and it may be slow. */
*again = TRUE;
}
}
else if (h)
{
unsigned char code;
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
instruction if needed. */
if (code == 0xcd)
{
bfd_put_8 (abfd, h->movm_args, contents + irel->r_offset + 2);
bfd_put_8 (abfd, h->stack_size + h->movm_stack_size,
contents + irel->r_offset + 3);
}
}
value -= (sec->output_section->vma + sec->output_offset);
value -= irel->r_offset;
value += irel->r_addend;
0x7f + 1 as the target will be one bytes closer if we are
able to relax. */
if ((long) value < 0x80 && (long) value > -0x80)
{
unsigned char code;
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
if (code != 0xcc)
continue;
elf_section_data (sec)->relocs = internal_relocs;
elf_section_data (sec)->this_hdr.contents = contents;
symtab_hdr->contents = (unsigned char *) isymbuf;
bfd_put_8 (abfd, 0xca, contents + irel->r_offset - 1);
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
R_MN10300_PCREL8);
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
irel->r_offset + 1, 1))
goto error_return;
Note that this is not required, and it may be slow. */
*again = TRUE;
}
}
which immediately follows a conditional 8 bit pc-relative
branch around the unconditional branch.
original: new:
bCC lab1 bCC' lab2
bra lab2
lab1: lab1:
This happens when the bCC can't reach lab2 at assembly time,
but due to other relaxations it can reach at link time. */
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_PCREL8)
{
Elf_Internal_Rela *nrel;
bfd_vma value = symval;
unsigned char code;
value -= (sec->output_section->vma + sec->output_offset);
value -= irel->r_offset;
value += irel->r_addend;
if (irel->r_offset == sec->size)
continue;
branch, more often than not this test will fail, so we
test it first to speed things up. */
code = bfd_get_8 (abfd, contents + irel->r_offset + 1);
if (code != 0xca)
continue;
instruction and that it's a pc-relative 8 bit branch. */
nrel = irel + 1;
if (nrel == irelend
|| irel->r_offset + 2 != nrel->r_offset
|| ELF32_R_TYPE (nrel->r_info) != (int) R_MN10300_PCREL8)
continue;
unconditional branch. */
if (symval != (sec->output_section->vma + sec->output_offset
+ irel->r_offset + 3))
continue;
be necessary, but why take the chance.
Note these checks assume that R_MN10300_PCREL8 relocs
only occur on bCC and bCCx insns. If they occured
elsewhere, we'd need to know the start of this insn
for this check to be accurate. */
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
if (code != 0xc0 && code != 0xc1 && code != 0xc2
&& code != 0xc3 && code != 0xc4 && code != 0xc5
&& code != 0xc6 && code != 0xc7 && code != 0xc8
&& code != 0xc9 && code != 0xe8 && code != 0xe9
&& code != 0xea && code != 0xeb)
continue;
at the unconditional branch. */
if (mn10300_elf_symbol_address_p (abfd, sec, isymbuf,
irel->r_offset + 1))
continue;
elf_section_data (sec)->relocs = internal_relocs;
elf_section_data (sec)->this_hdr.contents = contents;
symtab_hdr->contents = (unsigned char *) isymbuf;
switch (code)
{
case 0xc8:
code = 0xc9;
break;
case 0xc9:
code = 0xc8;
break;
case 0xc0:
code = 0xc2;
break;
case 0xc2:
code = 0xc0;
break;
case 0xc3:
code = 0xc1;
break;
case 0xc1:
code = 0xc3;
break;
case 0xc4:
code = 0xc6;
break;
case 0xc6:
code = 0xc4;
break;
case 0xc7:
code = 0xc5;
break;
case 0xc5:
code = 0xc7;
break;
case 0xe8:
code = 0xe9;
break;
case 0x9d:
code = 0xe8;
break;
case 0xea:
code = 0xeb;
break;
case 0xeb:
code = 0xea;
break;
}
bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
from the second branch. */
irel->r_info = nrel->r_info;
nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
R_MN10300_NONE);
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
irel->r_offset + 1, 2))
goto error_return;
Note that this is not required, and it may be slow. */
*again = TRUE;
}
into a 8 immediate, displacement or absolute address. */
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_24)
{
bfd_vma value = symval;
value += irel->r_addend;
if ((long) value < 0x7f && (long) value > -0x80)
{
unsigned char code;
will have 0xfd as the first byte. */
code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
if (code == 0xfd)
{
code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
equivalent instructions exists. */
if (code != 0x6b && code != 0x7b
&& code != 0x8b && code != 0x9b
&& ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
|| (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
|| (code & 0x0f) == 0x0e))
{
move the value out of high mem and thus not fit
in a signed 8bit value. This is currently over
conservative. */
if ((value & 0x80) == 0)
{
etc. */
elf_section_data (sec)->relocs = internal_relocs;
elf_section_data (sec)->this_hdr.contents = contents;
symtab_hdr->contents = (unsigned char *) isymbuf;
bfd_put_8 (abfd, 0xfb, contents + irel->r_offset - 3);
bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
irel->r_info =
ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
R_MN10300_8);
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
irel->r_offset + 1, 2))
goto error_return;
again. Note that this is not required, and it
may be slow. */
*again = TRUE;
break;
}
}
}
}
}
into a 16bit immediate, displacement or absolute address. */
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_32
|| ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32
|| ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32
|| ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
{
bfd_vma value = symval;
if (ELF32_R_TYPE (irel->r_info) != (int) R_MN10300_32)
{
asection * sgot;
sgot = bfd_get_section_by_name (elf_hash_table (link_info)
->dynobj, ".got");
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOT32)
{
value = sgot->output_offset;
if (h)
value += h->root.got.offset;
else
value += (elf_local_got_offsets
(abfd)[ELF32_R_SYM (irel->r_info)]);
}
else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTOFF32)
value -= sgot->output_section->vma;
else if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10300_GOTPC32)
value = (sgot->output_section->vma
- (sec->output_section->vma
+ sec->output_offset
+ irel->r_offset));
else
abort ();
}
value += irel->r_addend;
We allow any 16bit match here. We prune those we can't
handle below. */
if ((long) value < 0x7fffff && (long) value > -0x800000)
{
unsigned char code;
will have 0xfe as the first byte. */
code = bfd_get_8 (abfd, contents + irel->r_offset - 3);
if (code == 0xfe)
{
code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
equivalent instructions exists. */
if (code != 0x6b && code != 0x7b
&& code != 0x8b && code != 0x9b
&& (ELF32_R_TYPE (irel->r_info)
!= (int) R_MN10300_GOTPC32)
&& ((code & 0x0f) == 0x09 || (code & 0x0f) == 0x08
|| (code & 0x0f) == 0x0a || (code & 0x0f) == 0x0b
|| (code & 0x0f) == 0x0e))
{
move the value out of high mem and thus not fit
in a signed 16bit value. This is currently over
conservative. */
if ((value & 0x8000) == 0)
{
etc. */
elf_section_data (sec)->relocs = internal_relocs;
elf_section_data (sec)->this_hdr.contents = contents;
symtab_hdr->contents = (unsigned char *) isymbuf;
bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 3);
bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
irel->r_info =
ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
(ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOTOFF32)
? R_MN10300_GOTOFF24
: (ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOT32)
? R_MN10300_GOT24 :
R_MN10300_24);
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
irel->r_offset + 3, 1))
goto error_return;
again. Note that this is not required, and it
may be slow. */
*again = TRUE;
break;
}
}
}
}
We allow any 16bit match here. We prune those we can't
handle below. */
if ((long) value < 0x7fff && (long) value > -0x8000)
{
unsigned char code;
exceptions are pcrel insns and bit insns.
We handle pcrel insns above. We don't bother trying
to handle the bit insns here.
The first byte of the remaining insns will be 0xfc. */
code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
if (code != 0xfc)
continue;
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
if ((code & 0xf0) < 0x80)
switch (code & 0xf0)
{
mov dm,(d32,am) -> mov dn,(d32,am)
mov (d32,am),an -> mov (d32,am),an
mov dm,(d32,am) -> mov dn,(d32,am)
movbu (d32,am),dn -> movbu (d32,am),dn
movbu dm,(d32,am) -> movbu dn,(d32,am)
movhu (d32,am),dn -> movhu (d32,am),dn
movhu dm,(d32,am) -> movhu dn,(d32,am) */
case 0x00:
case 0x10:
case 0x20:
case 0x30:
case 0x40:
case 0x50:
case 0x60:
case 0x70:
move the value out of high mem and thus not fit
in a signed 16bit value. */
if (code == 0xcc
&& (value & 0x8000))
continue;
elf_section_data (sec)->relocs = internal_relocs;
elf_section_data (sec)->this_hdr.contents = contents;
symtab_hdr->contents = (unsigned char *) isymbuf;
bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
(ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOTOFF32)
? R_MN10300_GOTOFF16
: (ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOT32)
? R_MN10300_GOT16
: (ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOTPC32)
? R_MN10300_GOTPC16 :
R_MN10300_16);
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
irel->r_offset + 2, 2))
goto error_return;
Note that this is not required, and it may be slow. */
*again = TRUE;
break;
}
else if ((code & 0xf0) == 0x80
|| (code & 0xf0) == 0x90)
switch (code & 0xf3)
{
movbu dn,(abs32) -> movbu dn,(abs16)
movhu dn,(abs32) -> movhu dn,(abs16) */
case 0x81:
case 0x82:
case 0x83:
elf_section_data (sec)->relocs = internal_relocs;
elf_section_data (sec)->this_hdr.contents = contents;
symtab_hdr->contents = (unsigned char *) isymbuf;
if ((code & 0xf3) == 0x81)
code = 0x01 + (code & 0x0c);
else if ((code & 0xf3) == 0x82)
code = 0x02 + (code & 0x0c);
else if ((code & 0xf3) == 0x83)
code = 0x03 + (code & 0x0c);
else
abort ();
bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
(ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOTOFF32)
? R_MN10300_GOTOFF16
: (ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOT32)
? R_MN10300_GOT16
: (ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOTPC32)
? R_MN10300_GOTPC16 :
R_MN10300_16);
addend and offset too! */
irel->r_offset -= 1;
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
irel->r_offset + 1, 3))
goto error_return;
Note that this is not required, and it may be slow. */
*again = TRUE;
break;
mov am,(d32,sp) -> mov am,(d16,sp)
mov dm,(d32,sp) -> mov dm,(d32,sp)
movbu dm,(d32,sp) -> movbu dm,(d32,sp)
movhu dm,(d32,sp) -> movhu dm,(d32,sp) */
case 0x80:
case 0x90:
case 0x91:
case 0x92:
case 0x93:
if (code >= 0x90 && code <= 0x93
&& (long)value < 0)
continue;
elf_section_data (sec)->relocs = internal_relocs;
elf_section_data (sec)->this_hdr.contents = contents;
symtab_hdr->contents = (unsigned char *) isymbuf;
bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
(ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOTOFF32)
? R_MN10300_GOTOFF16
: (ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOT32)
? R_MN10300_GOT16
: (ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOTPC32)
? R_MN10300_GOTPC16 :
R_MN10300_16);
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
irel->r_offset + 2, 2))
goto error_return;
Note that this is not required, and it may be slow. */
*again = TRUE;
break;
}
else if ((code & 0xf0) < 0xf0)
switch (code & 0xfc)
{
mov imm32,an -> mov imm16,an
mov (abs32),dn -> mov (abs16),dn
movbu (abs32),dn -> movbu (abs16),dn
movhu (abs32),dn -> movhu (abs16),dn */
case 0xcc:
case 0xdc:
case 0xa4:
case 0xa8:
case 0xac:
move the value out of high mem and thus not fit
in a signed 16bit value. */
if (code == 0xcc
&& (value & 0x8000))
continue;
if (code == 0xdc
&& (long)value < 0)
continue;
elf_section_data (sec)->relocs = internal_relocs;
elf_section_data (sec)->this_hdr.contents = contents;
symtab_hdr->contents = (unsigned char *) isymbuf;
if ((code & 0xfc) == 0xcc)
code = 0x2c + (code & 0x03);
else if ((code & 0xfc) == 0xdc)
code = 0x24 + (code & 0x03);
else if ((code & 0xfc) == 0xa4)
code = 0x30 + (code & 0x03);
else if ((code & 0xfc) == 0xa8)
code = 0x34 + (code & 0x03);
else if ((code & 0xfc) == 0xac)
code = 0x38 + (code & 0x03);
else
abort ();
bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
(ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOTOFF32)
? R_MN10300_GOTOFF16
: (ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOT32)
? R_MN10300_GOT16
: (ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOTPC32)
? R_MN10300_GOTPC16 :
R_MN10300_16);
addend and offset too! */
irel->r_offset -= 1;
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
irel->r_offset + 1, 3))
goto error_return;
Note that this is not required, and it may be slow. */
*again = TRUE;
break;
mov (d32,sp),an -> mov (d16,sp),an
mov (d32,sp),dn -> mov (d16,sp),dn
movbu (d32,sp),dn -> movbu (d16,sp),dn
movhu (d32,sp),dn -> movhu (d16,sp),dn
add imm32,dn -> add imm16,dn
cmp imm32,dn -> cmp imm16,dn
add imm32,an -> add imm16,an
cmp imm32,an -> cmp imm16,an
and imm32,dn -> and imm16,dn
or imm32,dn -> or imm16,dn
xor imm32,dn -> xor imm16,dn
btst imm32,dn -> btst imm16,dn */
case 0xa0:
case 0xb0:
case 0xb1:
case 0xb2:
case 0xb3:
case 0xc0:
case 0xc8:
case 0xd0:
case 0xd8:
case 0xe0:
case 0xe1:
case 0xe2:
case 0xe3:
if (code == 0xdc
&& (long)value < 0)
continue;
if (code >= 0xb0 && code <= 0xb3
&& (long)value < 0)
continue;
elf_section_data (sec)->relocs = internal_relocs;
elf_section_data (sec)->this_hdr.contents = contents;
symtab_hdr->contents = (unsigned char *) isymbuf;
bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
(ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOTOFF32)
? R_MN10300_GOTOFF16
: (ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOT32)
? R_MN10300_GOT16
: (ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOTPC32)
? R_MN10300_GOTPC16 :
R_MN10300_16);
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
irel->r_offset + 2, 2))
goto error_return;
Note that this is not required, and it may be slow. */
*again = TRUE;
break;
}
else if (code == 0xfe)
{
elf_section_data (sec)->relocs = internal_relocs;
elf_section_data (sec)->this_hdr.contents = contents;
symtab_hdr->contents = (unsigned char *) isymbuf;
bfd_put_8 (abfd, 0xfa, contents + irel->r_offset - 2);
bfd_put_8 (abfd, 0xfe, contents + irel->r_offset - 1);
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
(ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOT32)
? R_MN10300_GOT16
: (ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOTOFF32)
? R_MN10300_GOTOFF16
: (ELF32_R_TYPE (irel->r_info)
== (int) R_MN10300_GOTPC32)
? R_MN10300_GOTPC16 :
R_MN10300_16);
if (!mn10300_elf_relax_delete_bytes (abfd, sec,
irel->r_offset + 2, 2))
goto error_return;
Note that this is not required, and it may be slow. */
*again = TRUE;
break;
}
}
}
}
if (isymbuf != NULL
&& symtab_hdr->contents != (unsigned char *) isymbuf)
{
if (! link_info->keep_memory)
free (isymbuf);
else
{
symtab_hdr->contents = (unsigned char *) isymbuf;
}
}
if (contents != NULL
&& elf_section_data (sec)->this_hdr.contents != contents)
{
if (! link_info->keep_memory)
free (contents);
else
{
elf_section_data (sec)->this_hdr.contents = contents;
}
}
if (internal_relocs != NULL
&& elf_section_data (sec)->relocs != internal_relocs)
free (internal_relocs);
return TRUE;
error_return:
if (isymbuf != NULL
&& symtab_hdr->contents != (unsigned char *) isymbuf)
free (isymbuf);
if (contents != NULL
&& elf_section_data (section)->this_hdr.contents != contents)
free (contents);
if (internal_relocs != NULL
&& elf_section_data (section)->relocs != internal_relocs)
free (internal_relocs);
return FALSE;
}
referred to by HASH at address ADDR in section with
contents CONTENTS, store the information in the hash table. */
static void
compute_function_info (abfd, hash, addr, contents)
bfd *abfd;
struct elf32_mn10300_link_hash_entry *hash;
bfd_vma addr;
unsigned char *contents;
{
unsigned char byte1, byte2;
sequences here. Basically we look for:
movm [d2,d3,a2,a3],sp (optional)
add <size>,sp (optional, and only for sizes which fit in an unsigned
8 bit number)
If we find anything else, we quit. */
byte1 = bfd_get_8 (abfd, contents + addr);
byte2 = bfd_get_8 (abfd, contents + addr + 1);
if (byte1 == 0xcf)
{
hash->movm_args = byte2;
addr += 2;
byte1 = bfd_get_8 (abfd, contents + addr);
byte2 = bfd_get_8 (abfd, contents + addr + 1);
}
instruction. We need this kept separate from the function's normal
stack space. */
if (hash->movm_args)
{
if (hash->movm_args & 0x80)
hash->movm_stack_size += 4;
if (hash->movm_args & 0x40)
hash->movm_stack_size += 4;
if (hash->movm_args & 0x20)
hash->movm_stack_size += 4;
if (hash->movm_args & 0x10)
hash->movm_stack_size += 4;
if (hash->movm_args & 0x08)
hash->movm_stack_size += 8 * 4;
if (bfd_get_mach (abfd) == bfd_mach_am33
|| bfd_get_mach (abfd) == bfd_mach_am33_2)
{
if (hash->movm_args & 0x1)
hash->movm_stack_size += 6 * 4;
if (hash->movm_args & 0x2)
hash->movm_stack_size += 4 * 4;
if (hash->movm_args & 0x4)
hash->movm_stack_size += 2 * 4;
}
}
if (byte1 == 0xf8 && byte2 == 0xfe)
{
int temp = bfd_get_8 (abfd, contents + addr + 2);
temp = ((temp & 0xff) ^ (~0x7f)) + 0x80;
hash->stack_size = -temp;
}
else if (byte1 == 0xfa && byte2 == 0xfe)
{
int temp = bfd_get_16 (abfd, contents + addr + 2);
temp = ((temp & 0xffff) ^ (~0x7fff)) + 0x8000;
temp = -temp;
if (temp < 255)
hash->stack_size = temp;
}
than 255 bytes, then we can't remove the stack adjustment by using
"call" (we might still be able to remove the "movm" instruction. */
if (hash->stack_size + hash->movm_stack_size > 255)
hash->stack_size = 0;
return;
}
static bfd_boolean
mn10300_elf_relax_delete_bytes (abfd, sec, addr, count)
bfd *abfd;
asection *sec;
bfd_vma addr;
int count;
{
Elf_Internal_Shdr *symtab_hdr;
unsigned int sec_shndx;
bfd_byte *contents;
Elf_Internal_Rela *irel, *irelend;
Elf_Internal_Rela *irelalign;
bfd_vma toaddr;
Elf_Internal_Sym *isym, *isymend;
struct elf_link_hash_entry **sym_hashes;
struct elf_link_hash_entry **end_hashes;
unsigned int symcount;
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
contents = elf_section_data (sec)->this_hdr.contents;
power larger than the number of bytes we are deleting. */
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;
}
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
isym = (Elf_Internal_Sym *) symtab_hdr->contents;
for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
{
if (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->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;
}
FALSE. */
static bfd_boolean
mn10300_elf_symbol_address_p (abfd, sec, isym, addr)
bfd *abfd;
asection *sec;
Elf_Internal_Sym *isym;
bfd_vma addr;
{
Elf_Internal_Shdr *symtab_hdr;
unsigned int sec_shndx;
Elf_Internal_Sym *isymend;
struct elf_link_hash_entry **sym_hashes;
struct elf_link_hash_entry **end_hashes;
unsigned int symcount;
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
{
if (isym->st_shndx == sec_shndx
&& isym->st_value == addr)
return TRUE;
}
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->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)
return TRUE;
}
return FALSE;
}
which uses mn10300_elf_relocate_section. */
static bfd_byte *
mn10300_elf_get_relocated_section_contents (output_bfd, link_info, link_order,
data, relocatable, symbols)
bfd *output_bfd;
struct bfd_link_info *link_info;
struct bfd_link_order *link_order;
bfd_byte *data;
bfd_boolean relocatable;
asymbol **symbols;
{
Elf_Internal_Shdr *symtab_hdr;
asection *input_section = link_order->u.indirect.section;
bfd *input_bfd = input_section->owner;
asection **sections = NULL;
Elf_Internal_Rela *internal_relocs = NULL;
Elf_Internal_Sym *isymbuf = NULL;
particular set of section contents, specially. */
if (relocatable
|| elf_section_data (input_section)->this_hdr.contents == NULL)
return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
link_order, data,
relocatable,
symbols);
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
memcpy (data, elf_section_data (input_section)->this_hdr.contents,
(size_t) input_section->size);
if ((input_section->flags & SEC_RELOC) != 0
&& input_section->reloc_count > 0)
{
asection **secpp;
Elf_Internal_Sym *isym, *isymend;
bfd_size_type amt;
internal_relocs = (_bfd_elf_link_read_relocs
(input_bfd, input_section, (PTR) NULL,
(Elf_Internal_Rela *) NULL, FALSE));
if (internal_relocs == NULL)
goto error_return;
if (symtab_hdr->sh_info != 0)
{
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
if (isymbuf == NULL)
isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
symtab_hdr->sh_info, 0,
NULL, NULL, NULL);
if (isymbuf == NULL)
goto error_return;
}
amt = symtab_hdr->sh_info;
amt *= sizeof (asection *);
sections = (asection **) bfd_malloc (amt);
if (sections == NULL && amt != 0)
goto error_return;
isymend = isymbuf + symtab_hdr->sh_info;
for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
{
asection *isec;
if (isym->st_shndx == SHN_UNDEF)
isec = bfd_und_section_ptr;
else if (isym->st_shndx == SHN_ABS)
isec = bfd_abs_section_ptr;
else if (isym->st_shndx == SHN_COMMON)
isec = bfd_com_section_ptr;
else
isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
*secpp = isec;
}
if (! mn10300_elf_relocate_section (output_bfd, link_info, input_bfd,
input_section, data, internal_relocs,
isymbuf, sections))
goto error_return;
if (sections != NULL)
free (sections);
if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
free (isymbuf);
if (internal_relocs != elf_section_data (input_section)->relocs)
free (internal_relocs);
}
return data;
error_return:
if (sections != NULL)
free (sections);
if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
free (isymbuf);
if (internal_relocs != NULL
&& internal_relocs != elf_section_data (input_section)->relocs)
free (internal_relocs);
return NULL;
}
static struct bfd_hash_entry *
elf32_mn10300_link_hash_newfunc (entry, table, string)
struct bfd_hash_entry *entry;
struct bfd_hash_table *table;
const char *string;
{
struct elf32_mn10300_link_hash_entry *ret =
(struct elf32_mn10300_link_hash_entry *) entry;
subclass. */
if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
ret = ((struct elf32_mn10300_link_hash_entry *)
bfd_hash_allocate (table,
sizeof (struct elf32_mn10300_link_hash_entry)));
if (ret == (struct elf32_mn10300_link_hash_entry *) NULL)
return (struct bfd_hash_entry *) ret;
ret = ((struct elf32_mn10300_link_hash_entry *)
_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
table, string));
if (ret != (struct elf32_mn10300_link_hash_entry *) NULL)
{
ret->direct_calls = 0;
ret->stack_size = 0;
ret->movm_args = 0;
ret->movm_stack_size = 0;
ret->flags = 0;
}
return (struct bfd_hash_entry *) ret;
}
static struct bfd_link_hash_table *
elf32_mn10300_link_hash_table_create (abfd)
bfd *abfd;
{
struct elf32_mn10300_link_hash_table *ret;
bfd_size_type amt = sizeof (struct elf32_mn10300_link_hash_table);
ret = (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
if (ret == (struct elf32_mn10300_link_hash_table *) NULL)
return NULL;
if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
elf32_mn10300_link_hash_newfunc,
sizeof (struct elf32_mn10300_link_hash_entry)))
{
free (ret);
return NULL;
}
ret->flags = 0;
amt = sizeof (struct elf_link_hash_table);
ret->static_hash_table
= (struct elf32_mn10300_link_hash_table *) bfd_malloc (amt);
if (ret->static_hash_table == NULL)
{
free (ret);
return NULL;
}
if (!_bfd_elf_link_hash_table_init (&ret->static_hash_table->root, abfd,
elf32_mn10300_link_hash_newfunc,
sizeof (struct elf32_mn10300_link_hash_entry)))
{
free (ret->static_hash_table);
free (ret);
return NULL;
}
return &ret->root.root;
}
static void
elf32_mn10300_link_hash_table_free (hash)
struct bfd_link_hash_table *hash;
{
struct elf32_mn10300_link_hash_table *ret
= (struct elf32_mn10300_link_hash_table *) hash;
_bfd_generic_link_hash_table_free
((struct bfd_link_hash_table *) ret->static_hash_table);
_bfd_generic_link_hash_table_free
((struct bfd_link_hash_table *) ret);
}
static unsigned long
elf_mn10300_mach (flags)
flagword flags;
{
switch (flags & EF_MN10300_MACH)
{
case E_MN10300_MACH_MN10300:
default:
return bfd_mach_mn10300;
case E_MN10300_MACH_AM33:
return bfd_mach_am33;
case E_MN10300_MACH_AM33_2:
return bfd_mach_am33_2;
}
}
file. This gets the MN10300 architecture right based on the machine
number. */
void
_bfd_mn10300_elf_final_write_processing (abfd, linker)
bfd *abfd;
bfd_boolean linker ATTRIBUTE_UNUSED;
{
unsigned long val;
switch (bfd_get_mach (abfd))
{
default:
case bfd_mach_mn10300:
val = E_MN10300_MACH_MN10300;
break;
case bfd_mach_am33:
val = E_MN10300_MACH_AM33;
break;
case bfd_mach_am33_2:
val = E_MN10300_MACH_AM33_2;
break;
}
elf_elfheader (abfd)->e_flags &= ~ (EF_MN10300_MACH);
elf_elfheader (abfd)->e_flags |= val;
}
bfd_boolean
_bfd_mn10300_elf_object_p (abfd)
bfd *abfd;
{
bfd_default_set_arch_mach (abfd, bfd_arch_mn10300,
elf_mn10300_mach (elf_elfheader (abfd)->e_flags));
return TRUE;
}
object file when linking. */
bfd_boolean
_bfd_mn10300_elf_merge_private_bfd_data (ibfd, obfd)
bfd *ibfd;
bfd *obfd;
{
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
return TRUE;
if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
&& bfd_get_mach (obfd) < bfd_get_mach (ibfd))
{
if (! bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
bfd_get_mach (ibfd)))
return FALSE;
}
return TRUE;
}
#define PLT0_ENTRY_SIZE 15
#define PLT_ENTRY_SIZE 20
#define PIC_PLT_ENTRY_SIZE 24
static const bfd_byte elf_mn10300_plt0_entry[PLT0_ENTRY_SIZE] =
{
0xfc, 0xa0, 0, 0, 0, 0,
0xfe, 0xe, 0x10, 0, 0, 0, 0,
0xf0, 0xf4,
};
static const bfd_byte elf_mn10300_plt_entry[PLT_ENTRY_SIZE] =
{
0xfc, 0xa0, 0, 0, 0, 0,
0xf0, 0xf4,
0xfe, 8, 0, 0, 0, 0, 0,
0xdc, 0, 0, 0, 0,
};
static const bfd_byte elf_mn10300_pic_plt_entry[PIC_PLT_ENTRY_SIZE] =
{
0xfc, 0x22, 0, 0, 0, 0,
0xf0, 0xf4,
0xfe, 8, 0, 0, 0, 0, 0,
0xf8, 0x22, 8,
0xfb, 0xa, 0x1a, 4,
0xf0, 0xf4,
};
#define elf_mn10300_sizeof_plt0(info) \
(info->shared ? PIC_PLT_ENTRY_SIZE : PLT0_ENTRY_SIZE)
#define elf_mn10300_sizeof_plt(info) \
(info->shared ? PIC_PLT_ENTRY_SIZE : PLT_ENTRY_SIZE)
#define elf_mn10300_plt_plt0_offset(info) 16
#define elf_mn10300_plt0_linker_offset(info) 2
#define elf_mn10300_plt0_gotid_offset(info) 9
#define elf_mn10300_plt_temp_offset(info) 8
#define elf_mn10300_plt_symbol_offset(info) 2
#define elf_mn10300_plt_reloc_offset(info) 11
section. */
#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
static bfd_boolean
_bfd_mn10300_elf_create_dynamic_sections (abfd, info)
bfd *abfd;
struct bfd_link_info *info;
{
flagword flags;
asection * s;
const struct elf_backend_data * bed = get_elf_backend_data (abfd);
int ptralign = 0;
switch (bed->s->arch_size)
{
case 32:
ptralign = 2;
break;
case 64:
ptralign = 3;
break;
default:
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
.rel[a].bss sections. */
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
| SEC_LINKER_CREATED);
s = bfd_make_section_with_flags (abfd,
(bed->default_use_rela_p
? ".rela.plt" : ".rel.plt"),
flags | SEC_READONLY);
if (s == NULL
|| ! bfd_set_section_alignment (abfd, s, ptralign))
return FALSE;
if (! _bfd_mn10300_elf_create_got_section (abfd, info))
return FALSE;
{
const char * secname;
char * relname;
flagword secflags;
asection * sec;
for (sec = abfd->sections; sec; sec = sec->next)
{
secflags = bfd_get_section_flags (abfd, sec);
if ((secflags & (SEC_DATA | SEC_LINKER_CREATED))
|| ((secflags & SEC_HAS_CONTENTS) != SEC_HAS_CONTENTS))
continue;
secname = bfd_get_section_name (abfd, sec);
relname = (char *) bfd_malloc (strlen (secname) + 6);
strcpy (relname, ".rela");
strcat (relname, secname);
s = bfd_make_section_with_flags (abfd, relname,
flags | SEC_READONLY);
if (s == NULL
|| ! bfd_set_section_alignment (abfd, s, ptralign))
return FALSE;
}
}
if (bed->want_dynbss)
{
by dynamic objects, are referenced by regular objects, and are
not functions. We must allocate space for them in the process
image and use a R_*_COPY reloc to tell the dynamic linker to
initialize them at run time. The linker script puts the .dynbss
section into the .bss section of the final image. */
s = bfd_make_section_with_flags (abfd, ".dynbss",
SEC_ALLOC | SEC_LINKER_CREATED);
if (s == NULL)
return FALSE;
normally needed. We need to create it here, though, so that the
linker will map it to an output section. We can't just create it
only if we need it, because we will not know whether we need it
until we have seen all the input files, and the first time the
main linker code calls BFD after examining all the input files
(size_dynamic_sections) the input sections have already been
mapped to the output sections. If the section turns out not to
be needed, we can discard it later. We will never need this
section when generating a shared object, since they do not use
copy relocs. */
if (! info->shared)
{
s = bfd_make_section_with_flags (abfd,
(bed->default_use_rela_p
? ".rela.bss" : ".rel.bss"),
flags | SEC_READONLY);
if (s == NULL
|| ! bfd_set_section_alignment (abfd, s, ptralign))
return FALSE;
}
}
return TRUE;
}
regular object. The current definition is in some section of the
dynamic object, but we're not including those sections. We have to
change the definition to something the rest of the link can
understand. */
static bfd_boolean
_bfd_mn10300_elf_adjust_dynamic_symbol (info, h)
struct bfd_link_info * info;
struct elf_link_hash_entry * h;
{
bfd * dynobj;
asection * s;
unsigned int power_of_two;
dynobj = elf_hash_table (info)->dynobj;
BFD_ASSERT (dynobj != NULL
&& (h->needs_plt
|| h->u.weakdef != NULL
|| (h->def_dynamic
&& h->ref_regular
&& !h->def_regular)));
will fill in the contents of the procedure linkage table later,
when we know the address of the .got section. */
if (h->type == STT_FUNC
|| h->needs_plt)
{
if (! info->shared
&& !h->def_dynamic
&& !h->ref_dynamic)
{
file, but the symbol was never referred to by a dynamic
object. In such a case, we don't actually need to build
a procedure linkage table, and we can just do a REL32
reloc instead. */
BFD_ASSERT (h->needs_plt);
return TRUE;
}
if (h->dynindx == -1)
{
if (! bfd_elf_link_record_dynamic_symbol (info, h))
return FALSE;
}
s = bfd_get_section_by_name (dynobj, ".plt");
BFD_ASSERT (s != NULL);
first entry. */
if (s->size == 0)
s->size += elf_mn10300_sizeof_plt0 (info);
not generating a shared library, then set the symbol to this
location in the .plt. This is required to make function
pointers compare as equal between the normal executable and
the shared library. */
if (! info->shared
&& !h->def_regular)
{
h->root.u.def.section = s;
h->root.u.def.value = s->size;
}
h->plt.offset = s->size;
s->size += elf_mn10300_sizeof_plt (info);
will be placed in the .got section by the linker script. */
s = bfd_get_section_by_name (dynobj, ".got.plt");
BFD_ASSERT (s != NULL);
s->size += 4;
s = bfd_get_section_by_name (dynobj, ".rela.plt");
BFD_ASSERT (s != NULL);
s->size += sizeof (Elf32_External_Rela);
return TRUE;
}
processor independent code will have arranged for us to see the
real definition first, and we can just use the same value. */
if (h->u.weakdef != NULL)
{
BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
|| h->u.weakdef->root.type == bfd_link_hash_defweak);
h->root.u.def.section = h->u.weakdef->root.u.def.section;
h->root.u.def.value = h->u.weakdef->root.u.def.value;
return TRUE;
}
is not a function. */
only references to the symbol are via the global offset table.
For such cases we need not do anything here; the relocations will
be handled correctly by relocate_section. */
if (info->shared)
return TRUE;
GOT, we don't need to generate a copy reloc. */
if (!h->non_got_ref)
return TRUE;
if (h->size == 0)
{
(*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
h->root.root.string);
return TRUE;
}
become part of the .bss section of the executable. There will be
an entry for this symbol in the .dynsym section. The dynamic
object will contain position independent code, so all references
from the dynamic object to this symbol will go through the global
offset table. The dynamic linker will use the .dynsym entry to
determine the address it must put in the global offset table, so
both the dynamic object and the regular object will refer to the
same memory location for the variable. */
s = bfd_get_section_by_name (dynobj, ".dynbss");
BFD_ASSERT (s != NULL);
copy the initial value out of the dynamic object and into the
runtime process image. We need to remember the offset into the
.rela.bss section we are going to use. */
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
{
asection * srel;
srel = bfd_get_section_by_name (dynobj, ".rela.bss");
BFD_ASSERT (srel != NULL);
srel->size += sizeof (Elf32_External_Rela);
h->needs_copy = 1;
}
have no idea how ELF linkers handle this. */
power_of_two = bfd_log2 (h->size);
if (power_of_two > 3)
power_of_two = 3;
s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
if (power_of_two > bfd_get_section_alignment (dynobj, s))
{
if (! bfd_set_section_alignment (dynobj, s, power_of_two))
return FALSE;
}
h->root.u.def.section = s;
h->root.u.def.value = s->size;
s->size += h->size;
return TRUE;
}
static bfd_boolean
_bfd_mn10300_elf_size_dynamic_sections (output_bfd, info)
bfd * output_bfd;
struct bfd_link_info * info;
{
bfd * dynobj;
asection * s;
bfd_boolean plt;
bfd_boolean relocs;
bfd_boolean reltext;
dynobj = elf_hash_table (info)->dynobj;
BFD_ASSERT (dynobj != NULL);
if (elf_hash_table (info)->dynamic_sections_created)
{
if (info->executable)
{
s = bfd_get_section_by_name (dynobj, ".interp");
BFD_ASSERT (s != NULL);
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
}
}
else
{
However, if we are not creating the dynamic sections, we will
not actually use these entries. Reset the size of .rela.got,
which will cause it to get stripped from the output file
below. */
s = bfd_get_section_by_name (dynobj, ".rela.got");
if (s != NULL)
s->size = 0;
}
determined the sizes of the various dynamic sections. Allocate
memory for them. */
plt = FALSE;
relocs = FALSE;
reltext = FALSE;
for (s = dynobj->sections; s != NULL; s = s->next)
{
const char * name;
if ((s->flags & SEC_LINKER_CREATED) == 0)
continue;
of the dynobj section names depend upon the input files. */
name = bfd_get_section_name (dynobj, s);
if (strcmp (name, ".plt") == 0)
{
plt = s->size != 0;
}
else if (strncmp (name, ".rela", 5) == 0)
{
if (s->size != 0)
{
asection * target;
than .rela.plt. */
if (strcmp (name, ".rela.plt") != 0)
{
const char * outname;
relocs = TRUE;
section, then we probably need a DT_TEXTREL
entry. The entries in the .rela.plt section
really apply to the .got section, which we
created ourselves and so know is not readonly. */
outname = bfd_get_section_name (output_bfd,
s->output_section);
target = bfd_get_section_by_name (output_bfd, outname + 5);
if (target != NULL
&& (target->flags & SEC_READONLY) != 0
&& (target->flags & SEC_ALLOC) != 0)
reltext = TRUE;
}
to copy relocs into the output file. */
s->reloc_count = 0;
}
}
else if (strncmp (name, ".got", 4) != 0
&& strcmp (name, ".dynbss") != 0)
continue;
if (s->size == 0)
{
output file. This is mostly to handle .rela.bss and
.rela.plt. We must create both sections in
create_dynamic_sections, because they must be created
before the linker maps input sections to output
sections. The linker does that before
adjust_dynamic_symbol is called, and it is that
function which decides whether anything needs to go
into these sections. */
s->flags |= SEC_EXCLUDE;
continue;
}
if ((s->flags & SEC_HAS_CONTENTS) == 0)
continue;
here in case unused entries are not reclaimed before the
section's contents are written out. This should not happen,
but this way if it does, we get a R_MN10300_NONE reloc
instead of garbage. */
s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
if (s->contents == NULL)
return FALSE;
}
if (elf_hash_table (info)->dynamic_sections_created)
{
values later, in _bfd_mn10300_elf_finish_dynamic_sections,
but we must add the entries now so that we get the correct
size for the .dynamic section. The DT_DEBUG entry is filled
in by the dynamic linker and used by the debugger. */
if (! info->shared)
{
if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
return FALSE;
}
if (plt)
{
if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
|| !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
|| !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
|| !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
return FALSE;
}
if (relocs)
{
if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
|| !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
|| !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
sizeof (Elf32_External_Rela)))
return FALSE;
}
if (reltext)
{
if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
return FALSE;
}
}
return TRUE;
}
dynamic sections here. */
static bfd_boolean
_bfd_mn10300_elf_finish_dynamic_symbol (output_bfd, info, h, sym)
bfd * output_bfd;
struct bfd_link_info * info;
struct elf_link_hash_entry * h;
Elf_Internal_Sym * sym;
{
bfd * dynobj;
dynobj = elf_hash_table (info)->dynobj;
if (h->plt.offset != (bfd_vma) -1)
{
asection * splt;
asection * sgot;
asection * srel;
bfd_vma plt_index;
bfd_vma got_offset;
Elf_Internal_Rela rel;
it up. */
BFD_ASSERT (h->dynindx != -1);
splt = bfd_get_section_by_name (dynobj, ".plt");
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
srel = bfd_get_section_by_name (dynobj, ".rela.plt");
BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL);
corresponds to this symbol. This is the index of this symbol
in all the symbols for which we are making plt entries. The
first entry in the procedure linkage table is reserved. */
plt_index = ((h->plt.offset - elf_mn10300_sizeof_plt0 (info))
/ elf_mn10300_sizeof_plt (info));
corresponds to this function. Each .got entry is 4 bytes.
The first three are reserved. */
got_offset = (plt_index + 3) * 4;
if (! info->shared)
{
memcpy (splt->contents + h->plt.offset, elf_mn10300_plt_entry,
elf_mn10300_sizeof_plt (info));
bfd_put_32 (output_bfd,
(sgot->output_section->vma
+ sgot->output_offset
+ got_offset),
(splt->contents + h->plt.offset
+ elf_mn10300_plt_symbol_offset (info)));
bfd_put_32 (output_bfd,
(1 - h->plt.offset - elf_mn10300_plt_plt0_offset (info)),
(splt->contents + h->plt.offset
+ elf_mn10300_plt_plt0_offset (info)));
}
else
{
memcpy (splt->contents + h->plt.offset, elf_mn10300_pic_plt_entry,
elf_mn10300_sizeof_plt (info));
bfd_put_32 (output_bfd, got_offset,
(splt->contents + h->plt.offset
+ elf_mn10300_plt_symbol_offset (info)));
}
bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
(splt->contents + h->plt.offset
+ elf_mn10300_plt_reloc_offset (info)));
bfd_put_32 (output_bfd,
(splt->output_section->vma
+ splt->output_offset
+ h->plt.offset
+ elf_mn10300_plt_temp_offset (info)),
sgot->contents + got_offset);
rel.r_offset = (sgot->output_section->vma
+ sgot->output_offset
+ got_offset);
rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_JMP_SLOT);
rel.r_addend = 0;
bfd_elf32_swap_reloca_out (output_bfd, &rel,
(bfd_byte *) ((Elf32_External_Rela *) srel->contents
+ plt_index));
if (!h->def_regular)
the .plt section. Leave the value alone. */
sym->st_shndx = SHN_UNDEF;
}
if (h->got.offset != (bfd_vma) -1)
{
asection * sgot;
asection * srel;
Elf_Internal_Rela rel;
sgot = bfd_get_section_by_name (dynobj, ".got");
srel = bfd_get_section_by_name (dynobj, ".rela.got");
BFD_ASSERT (sgot != NULL && srel != NULL);
rel.r_offset = (sgot->output_section->vma
+ sgot->output_offset
+ (h->got.offset &~ 1));
locally, we just want to emit a RELATIVE reloc. Likewise if
the symbol was forced to be local because of a version file.
The entry in the global offset table will already have been
initialized in the relocate_section function. */
if (info->shared
&& (info->symbolic || h->dynindx == -1)
&& h->def_regular)
{
rel.r_info = ELF32_R_INFO (0, R_MN10300_RELATIVE);
rel.r_addend = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset);
}
else
{
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_GLOB_DAT);
rel.r_addend = 0;
}
bfd_elf32_swap_reloca_out (output_bfd, &rel,
(bfd_byte *) ((Elf32_External_Rela *) srel->contents
+ srel->reloc_count));
++ srel->reloc_count;
}
if (h->needs_copy)
{
asection * s;
Elf_Internal_Rela rel;
BFD_ASSERT (h->dynindx != -1
&& (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak));
s = bfd_get_section_by_name (h->root.u.def.section->owner,
".rela.bss");
BFD_ASSERT (s != NULL);
rel.r_offset = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset);
rel.r_info = ELF32_R_INFO (h->dynindx, R_MN10300_COPY);
rel.r_addend = 0;
bfd_elf32_swap_reloca_out (output_bfd, &rel,
(bfd_byte *) ((Elf32_External_Rela *) s->contents
+ s->reloc_count));
++ s->reloc_count;
}
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|| h == elf_hash_table (info)->hgot)
sym->st_shndx = SHN_ABS;
return TRUE;
}
static bfd_boolean
_bfd_mn10300_elf_finish_dynamic_sections (output_bfd, info)
bfd * output_bfd;
struct bfd_link_info * info;
{
bfd * dynobj;
asection * sgot;
asection * sdyn;
dynobj = elf_hash_table (info)->dynobj;
sgot = bfd_get_section_by_name (dynobj, ".got.plt");
BFD_ASSERT (sgot != NULL);
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
if (elf_hash_table (info)->dynamic_sections_created)
{
asection * splt;
Elf32_External_Dyn * dyncon;
Elf32_External_Dyn * dynconend;
BFD_ASSERT (sdyn != NULL);
dyncon = (Elf32_External_Dyn *) sdyn->contents;
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
for (; dyncon < dynconend; dyncon++)
{
Elf_Internal_Dyn dyn;
const char * name;
asection * s;
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
switch (dyn.d_tag)
{
default:
break;
case DT_PLTGOT:
name = ".got";
goto get_vma;
case DT_JMPREL:
name = ".rela.plt";
get_vma:
s = bfd_get_section_by_name (output_bfd, name);
BFD_ASSERT (s != NULL);
dyn.d_un.d_ptr = s->vma;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
case DT_PLTRELSZ:
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
BFD_ASSERT (s != NULL);
dyn.d_un.d_val = s->size;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
case DT_RELASZ:
procedure linkage table relocs (DT_JMPREL) should be
included in the overall relocs (DT_RELA). This is
what Solaris does. However, UnixWare can not handle
that case. Therefore, we override the DT_RELASZ entry
here to make it not include the JMPREL relocs. Since
the linker script arranges for .rela.plt to follow all
other relocation sections, we don't have to worry
about changing the DT_RELA entry. */
s = bfd_get_section_by_name (output_bfd, ".rela.plt");
if (s != NULL)
dyn.d_un.d_val -= s->size;
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
break;
}
}
splt = bfd_get_section_by_name (dynobj, ".plt");
if (splt && splt->size > 0)
{
if (info->shared)
{
memcpy (splt->contents, elf_mn10300_pic_plt_entry,
elf_mn10300_sizeof_plt (info));
}
else
{
memcpy (splt->contents, elf_mn10300_plt0_entry, PLT0_ENTRY_SIZE);
bfd_put_32 (output_bfd,
sgot->output_section->vma + sgot->output_offset + 4,
splt->contents + elf_mn10300_plt0_gotid_offset (info));
bfd_put_32 (output_bfd,
sgot->output_section->vma + sgot->output_offset + 8,
splt->contents + elf_mn10300_plt0_linker_offset (info));
}
really seem like the right value. */
elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
}
}
if (sgot->size > 0)
{
if (sdyn == NULL)
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
else
bfd_put_32 (output_bfd,
sdyn->output_section->vma + sdyn->output_offset,
sgot->contents);
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
}
elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
return TRUE;
}
properly. */
static enum elf_reloc_type_class
_bfd_mn10300_elf_reloc_type_class (const Elf_Internal_Rela *rela)
{
switch ((int) ELF32_R_TYPE (rela->r_info))
{
case R_MN10300_RELATIVE:
return reloc_class_relative;
case R_MN10300_JMP_SLOT:
return reloc_class_plt;
case R_MN10300_COPY:
return reloc_class_copy;
default:
return reloc_class_normal;
}
}
#ifndef ELF_ARCH
#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_MN10300
#define ELF_MACHINE_ALT1 EM_CYGNUS_MN10300
#define ELF_MAXPAGESIZE 0x1000
#endif
#define elf_info_to_howto mn10300_info_to_howto
#define elf_info_to_howto_rel 0
#define elf_backend_can_gc_sections 1
#define elf_backend_rela_normal 1
#define elf_backend_check_relocs mn10300_elf_check_relocs
#define elf_backend_gc_mark_hook mn10300_elf_gc_mark_hook
#define elf_backend_relocate_section mn10300_elf_relocate_section
#define bfd_elf32_bfd_relax_section mn10300_elf_relax_section
#define bfd_elf32_bfd_get_relocated_section_contents \
mn10300_elf_get_relocated_section_contents
#define bfd_elf32_bfd_link_hash_table_create \
elf32_mn10300_link_hash_table_create
#define bfd_elf32_bfd_link_hash_table_free \
elf32_mn10300_link_hash_table_free
#ifndef elf_symbol_leading_char
#define elf_symbol_leading_char '_'
#endif
#define elf_backend_final_write_processing \
_bfd_mn10300_elf_final_write_processing
#define elf_backend_object_p _bfd_mn10300_elf_object_p
#define bfd_elf32_bfd_merge_private_bfd_data \
_bfd_mn10300_elf_merge_private_bfd_data
#define elf_backend_can_gc_sections 1
#define elf_backend_create_dynamic_sections \
_bfd_mn10300_elf_create_dynamic_sections
#define elf_backend_adjust_dynamic_symbol \
_bfd_mn10300_elf_adjust_dynamic_symbol
#define elf_backend_size_dynamic_sections \
_bfd_mn10300_elf_size_dynamic_sections
#define elf_backend_finish_dynamic_symbol \
_bfd_mn10300_elf_finish_dynamic_symbol
#define elf_backend_finish_dynamic_sections \
_bfd_mn10300_elf_finish_dynamic_sections
#define elf_backend_reloc_type_class \
_bfd_mn10300_elf_reloc_type_class
#define elf_backend_want_got_plt 1
#define elf_backend_plt_readonly 1
#define elf_backend_want_plt_sym 0
#define elf_backend_got_header_size 12
#include "elf32-target.h"