mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
545fd46b6b
relocations. * elfxx-mips.c (mips_reloc_against_discarded_section): New function. (_bfd_mips_elf_relocate_section): Call it, in place of RELOC_AGAINST_DISCARDED_SECTION. * elf-m10200.c (mn10200_elf_relocate_section): Update arguments to RELOC_AGAINST_DISCARDED_SECTION. * elf-m10300.c (mn10300_elf_relocate_section): Likewise. * elf32-arm.c (elf32_arm_relocate_section): Likewise. * elf32-avr.c (elf32_avr_relocate_section): Likewise. * elf32-bfin.c (bfin_relocate_section): Likewise. (bfinfdpic_relocate_section): Likewise. * elf32-cr16.c (elf32_cr16_relocate_section): Likewise. * elf32-cr16c.c (elf32_cr16c_relocate_section): Likewise. * elf32-cris.c (cris_elf_relocate_section): Likewise. * elf32-crx.c (elf32_crx_relocate_section): Likewise. * elf32-d10v.c (elf32_d10v_relocate_section): Likewise. * elf32-epiphany.c (epiphany_elf_relocate_section): Likewise. * elf32-fr30.c (fr30_elf_relocate_section): Likewise. * elf32-frv.c (elf32_frv_relocate_section): Likewise. * elf32-h8300.c (elf32_h8_relocate_section): Likewise. * elf32-hppa.c (elf32_hppa_relocate_section): Likewise. * elf32-i370.c (i370_elf_relocate_section): Likewise. * elf32-i386.c (elf_i386_relocate_section): Likewise. * elf32-i860.c (elf32_i860_relocate_section): Likewise. * elf32-ip2k.c (ip2k_elf_relocate_section): Likewise. * elf32-iq2000.c (iq2000_elf_relocate_section): Likewise. * elf32-lm32.c (lm32_elf_relocate_section): Likewise. * elf32-m32c.c (m32c_elf_relocate_section): Likewise. * elf32-m32r.c (m32r_elf_relocate_section): Likewise. * elf32-m68hc1x.c (elf32_m68hc11_relocate_section): Likewise. * elf32-m68k.c (elf_m68k_relocate_section): Likewise. * elf32-mcore.c (mcore_elf_relocate_section): Likewise. * elf32-mep.c (mep_elf_relocate_section): Likewise. * elf32-moxie.c (moxie_elf_relocate_section): Likewise. * elf32-msp430.c (elf32_msp430_relocate_section): Likewise. * elf32-mt.c (mt_elf_relocate_section): Likewise. * elf32-openrisc.c (openrisc_elf_relocate_section): Likewise. * elf32-ppc.c (ppc_elf_relocate_section): Likewise. * elf32-rl78.c (rl78_elf_relocate_section): Likewise. * elf32-rx.c (rx_elf_relocate_section): Likewise. * elf32-s390.c (elf_s390_relocate_section): Likewise. * elf32-score.c (s3_bfd_score_elf_relocate_section): Likewise. * elf32-score7.c (s7_bfd_score_elf_relocate_section): Likewise. * elf32-sh.c (sh_elf_relocate_section): Likewise. * elf32-spu.c (spu_elf_relocate_section): Likewise. * elf32-tic6x.c (elf32_tic6x_relocate_section): Likewise. * elf32-tilepro.c (tilepro_elf_relocate_section): Likewise. * elf32-v850.c (v850_elf_relocate_section): Likewise. * elf32-vax.c (elf_vax_relocate_section): Likewise. * elf32-xc16x.c (elf32_xc16x_relocate_section): Likewise. * elf32-xstormy16.c (xstormy16_elf_relocate_section): Likewise. * elf32-xtensa.c (elf_xtensa_relocate_section): Likewise. * elf64-alpha.c (elf64_alpha_relocate_section_r): Likewise. (elf64_alpha_relocate_section): Likewise. * elf64-hppa.c (elf64_hppa_relocate_section): Likewise. * elf64-mmix.c (mmix_elf_relocate_section): Likewise. * elf64-ppc.c (ppc64_elf_relocate_section): Likewise. * elf64-s390.c (elf_s390_relocate_section): Likewise. * elf64-sh64.c (sh_elf64_relocate_section): Likewise. * elf64-x86-64.c (elf_x86_64_relocate_section): Likewise. * elfnn-ia64.c (elfNN_ia64_relocate_section): Likewise. * elfxx-sparc.c (_bfd_sparc_elf_relocate_section): Likewise. * elfxx-tilegx.c (tilegx_elf_relocate_section): Likewise.
1424 lines
40 KiB
C
1424 lines
40 KiB
C
/* Matsushita 10200 specific support for 32-bit ELF
|
||
Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
|
||
2007, 2010, 2012
|
||
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 3 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 "sysdep.h"
|
||
#include "bfd.h"
|
||
#include "libbfd.h"
|
||
#include "elf-bfd.h"
|
||
|
||
static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
|
||
PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
|
||
static void mn10200_info_to_howto
|
||
PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
|
||
static bfd_boolean mn10200_elf_relax_delete_bytes
|
||
PARAMS ((bfd *, asection *, bfd_vma, int));
|
||
static bfd_boolean mn10200_elf_symbol_address_p
|
||
PARAMS ((bfd *, asection *, Elf_Internal_Sym *, bfd_vma));
|
||
static bfd_reloc_status_type mn10200_elf_final_link_relocate
|
||
PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *,
|
||
bfd_byte *, bfd_vma, bfd_vma, bfd_vma,
|
||
struct bfd_link_info *, asection *, int));
|
||
static bfd_boolean mn10200_elf_relocate_section
|
||
PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
|
||
bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *,
|
||
asection **));
|
||
static bfd_boolean mn10200_elf_relax_section
|
||
PARAMS ((bfd *, asection *, struct bfd_link_info *, bfd_boolean *));
|
||
static bfd_byte * mn10200_elf_get_relocated_section_contents
|
||
PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
|
||
bfd_byte *, bfd_boolean, asymbol **));
|
||
|
||
enum reloc_type {
|
||
R_MN10200_NONE = 0,
|
||
R_MN10200_32,
|
||
R_MN10200_16,
|
||
R_MN10200_8,
|
||
R_MN10200_24,
|
||
R_MN10200_PCREL8,
|
||
R_MN10200_PCREL16,
|
||
R_MN10200_PCREL24,
|
||
R_MN10200_MAX
|
||
};
|
||
|
||
static reloc_howto_type elf_mn10200_howto_table[] = {
|
||
/* Dummy relocation. Does nothing. */
|
||
HOWTO (R_MN10200_NONE,
|
||
0,
|
||
2,
|
||
16,
|
||
FALSE,
|
||
0,
|
||
complain_overflow_bitfield,
|
||
bfd_elf_generic_reloc,
|
||
"R_MN10200_NONE",
|
||
FALSE,
|
||
0,
|
||
0,
|
||
FALSE),
|
||
/* Standard 32 bit reloc. */
|
||
HOWTO (R_MN10200_32,
|
||
0,
|
||
2,
|
||
32,
|
||
FALSE,
|
||
0,
|
||
complain_overflow_bitfield,
|
||
bfd_elf_generic_reloc,
|
||
"R_MN10200_32",
|
||
FALSE,
|
||
0xffffffff,
|
||
0xffffffff,
|
||
FALSE),
|
||
/* Standard 16 bit reloc. */
|
||
HOWTO (R_MN10200_16,
|
||
0,
|
||
1,
|
||
16,
|
||
FALSE,
|
||
0,
|
||
complain_overflow_bitfield,
|
||
bfd_elf_generic_reloc,
|
||
"R_MN10200_16",
|
||
FALSE,
|
||
0xffff,
|
||
0xffff,
|
||
FALSE),
|
||
/* Standard 8 bit reloc. */
|
||
HOWTO (R_MN10200_8,
|
||
0,
|
||
0,
|
||
8,
|
||
FALSE,
|
||
0,
|
||
complain_overflow_bitfield,
|
||
bfd_elf_generic_reloc,
|
||
"R_MN10200_8",
|
||
FALSE,
|
||
0xff,
|
||
0xff,
|
||
FALSE),
|
||
/* Standard 24 bit reloc. */
|
||
HOWTO (R_MN10200_24,
|
||
0,
|
||
2,
|
||
24,
|
||
FALSE,
|
||
0,
|
||
complain_overflow_bitfield,
|
||
bfd_elf_generic_reloc,
|
||
"R_MN10200_24",
|
||
FALSE,
|
||
0xffffff,
|
||
0xffffff,
|
||
FALSE),
|
||
/* Simple 8 pc-relative reloc. */
|
||
HOWTO (R_MN10200_PCREL8,
|
||
0,
|
||
0,
|
||
8,
|
||
TRUE,
|
||
0,
|
||
complain_overflow_bitfield,
|
||
bfd_elf_generic_reloc,
|
||
"R_MN10200_PCREL8",
|
||
FALSE,
|
||
0xff,
|
||
0xff,
|
||
TRUE),
|
||
/* Simple 16 pc-relative reloc. */
|
||
HOWTO (R_MN10200_PCREL16,
|
||
0,
|
||
1,
|
||
16,
|
||
TRUE,
|
||
0,
|
||
complain_overflow_bitfield,
|
||
bfd_elf_generic_reloc,
|
||
"R_MN10200_PCREL16",
|
||
FALSE,
|
||
0xffff,
|
||
0xffff,
|
||
TRUE),
|
||
/* Simple 32bit pc-relative reloc with a 1 byte adjustment
|
||
to get the pc-relative offset correct. */
|
||
HOWTO (R_MN10200_PCREL24,
|
||
0,
|
||
2,
|
||
24,
|
||
TRUE,
|
||
0,
|
||
complain_overflow_bitfield,
|
||
bfd_elf_generic_reloc,
|
||
"R_MN10200_PCREL24",
|
||
FALSE,
|
||
0xffffff,
|
||
0xffffff,
|
||
TRUE),
|
||
};
|
||
|
||
struct mn10200_reloc_map {
|
||
bfd_reloc_code_real_type bfd_reloc_val;
|
||
unsigned char elf_reloc_val;
|
||
};
|
||
|
||
static const struct mn10200_reloc_map mn10200_reloc_map[] = {
|
||
{ BFD_RELOC_NONE , R_MN10200_NONE , },
|
||
{ BFD_RELOC_32 , R_MN10200_32 , },
|
||
{ BFD_RELOC_16 , R_MN10200_16 , },
|
||
{ BFD_RELOC_8 , R_MN10200_8 , },
|
||
{ BFD_RELOC_24 , R_MN10200_24 , },
|
||
{ BFD_RELOC_8_PCREL , R_MN10200_PCREL8 , },
|
||
{ BFD_RELOC_16_PCREL, R_MN10200_PCREL16, },
|
||
{ BFD_RELOC_24_PCREL, R_MN10200_PCREL24, },
|
||
};
|
||
|
||
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 (mn10200_reloc_map) / sizeof (struct mn10200_reloc_map);
|
||
i++)
|
||
{
|
||
if (mn10200_reloc_map[i].bfd_reloc_val == code)
|
||
return &elf_mn10200_howto_table[mn10200_reloc_map[i].elf_reloc_val];
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static reloc_howto_type *
|
||
bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
||
const char *r_name)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0;
|
||
i < (sizeof (elf_mn10200_howto_table)
|
||
/ sizeof (elf_mn10200_howto_table[0]));
|
||
i++)
|
||
if (elf_mn10200_howto_table[i].name != NULL
|
||
&& strcasecmp (elf_mn10200_howto_table[i].name, r_name) == 0)
|
||
return &elf_mn10200_howto_table[i];
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Set the howto pointer for an MN10200 ELF reloc. */
|
||
|
||
static void
|
||
mn10200_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_MN10200_MAX);
|
||
cache_ptr->howto = &elf_mn10200_howto_table[r_type];
|
||
}
|
||
|
||
/* Perform a relocation as part of a final link. */
|
||
|
||
static bfd_reloc_status_type
|
||
mn10200_elf_final_link_relocate (howto, input_bfd, output_bfd,
|
||
input_section, contents, offset, value,
|
||
addend, info, sym_sec, is_local)
|
||
reloc_howto_type *howto;
|
||
bfd *input_bfd;
|
||
bfd *output_bfd ATTRIBUTE_UNUSED;
|
||
asection *input_section;
|
||
bfd_byte *contents;
|
||
bfd_vma offset;
|
||
bfd_vma value;
|
||
bfd_vma addend;
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED;
|
||
asection *sym_sec ATTRIBUTE_UNUSED;
|
||
int is_local ATTRIBUTE_UNUSED;
|
||
{
|
||
unsigned long r_type = howto->type;
|
||
bfd_byte *hit_data = contents + offset;
|
||
|
||
switch (r_type)
|
||
{
|
||
|
||
case R_MN10200_NONE:
|
||
return bfd_reloc_ok;
|
||
|
||
case R_MN10200_32:
|
||
value += addend;
|
||
bfd_put_32 (input_bfd, value, hit_data);
|
||
return bfd_reloc_ok;
|
||
|
||
case R_MN10200_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_MN10200_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_MN10200_24:
|
||
value += addend;
|
||
|
||
if ((long) value > 0x7fffff || (long) value < -0x800000)
|
||
return bfd_reloc_overflow;
|
||
|
||
value &= 0xffffff;
|
||
value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000);
|
||
bfd_put_32 (input_bfd, value, hit_data);
|
||
return bfd_reloc_ok;
|
||
|
||
case R_MN10200_PCREL8:
|
||
value -= (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
value -= (offset + 1);
|
||
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_MN10200_PCREL16:
|
||
value -= (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
value -= (offset + 2);
|
||
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_MN10200_PCREL24:
|
||
value -= (input_section->output_section->vma
|
||
+ input_section->output_offset);
|
||
value -= (offset + 3);
|
||
value += addend;
|
||
|
||
if ((long) value > 0xffffff || (long) value < -0x1000000)
|
||
return bfd_reloc_overflow;
|
||
|
||
value &= 0xffffff;
|
||
value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000);
|
||
bfd_put_32 (input_bfd, value, hit_data);
|
||
return bfd_reloc_ok;
|
||
|
||
default:
|
||
return bfd_reloc_notsupported;
|
||
}
|
||
}
|
||
|
||
/* Relocate an MN10200 ELF section. */
|
||
static bfd_boolean
|
||
mn10200_elf_relocate_section (output_bfd, info, input_bfd, input_section,
|
||
contents, relocs, local_syms, local_sections)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
bfd *input_bfd;
|
||
asection *input_section;
|
||
bfd_byte *contents;
|
||
Elf_Internal_Rela *relocs;
|
||
Elf_Internal_Sym *local_syms;
|
||
asection **local_sections;
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
Elf_Internal_Rela *rel, *relend;
|
||
|
||
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
|
||
rel = relocs;
|
||
relend = relocs + input_section->reloc_count;
|
||
for (; rel < relend; rel++)
|
||
{
|
||
int r_type;
|
||
reloc_howto_type *howto;
|
||
unsigned long r_symndx;
|
||
Elf_Internal_Sym *sym;
|
||
asection *sec;
|
||
struct elf_link_hash_entry *h;
|
||
bfd_vma relocation;
|
||
bfd_reloc_status_type r;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
howto = elf_mn10200_howto_table + r_type;
|
||
|
||
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, warned;
|
||
|
||
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
||
r_symndx, symtab_hdr, sym_hashes,
|
||
h, sec, relocation,
|
||
unresolved_reloc, warned);
|
||
}
|
||
|
||
if (sec != NULL && discarded_section (sec))
|
||
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
|
||
rel, 1, relend, howto, 0, contents);
|
||
|
||
if (info->relocatable)
|
||
continue;
|
||
|
||
r = mn10200_elf_final_link_relocate (howto, input_bfd, output_bfd,
|
||
input_section,
|
||
contents, rel->r_offset,
|
||
relocation, rel->r_addend,
|
||
info, sec, h == NULL);
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
const char *name;
|
||
const char *msg = (const char *) 0;
|
||
|
||
if (h != NULL)
|
||
name = h->root.root.string;
|
||
else
|
||
{
|
||
name = (bfd_elf_string_from_elf_section
|
||
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
||
if (name == NULL || *name == '\0')
|
||
name = bfd_section_name (input_bfd, sec);
|
||
}
|
||
|
||
switch (r)
|
||
{
|
||
case bfd_reloc_overflow:
|
||
if (! ((*info->callbacks->reloc_overflow)
|
||
(info, (h ? &h->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");
|
||
/* fall through */
|
||
|
||
common_error:
|
||
if (!((*info->callbacks->warning)
|
||
(info, msg, name, input_bfd, input_section,
|
||
rel->r_offset)))
|
||
return FALSE;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* This function handles relaxing for the mn10200.
|
||
|
||
There are quite a few relaxing opportunities available on the mn10200:
|
||
|
||
* jsr:24 -> jsr:16 2 bytes
|
||
|
||
* jmp:24 -> 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 abs24 -> mov abs16 2 byte savings
|
||
|
||
* Most instructions which accept imm24 can relax to imm16 2 bytes
|
||
- Most instructions which accept imm16 can relax to imm8 1 byte
|
||
|
||
* Most instructions which accept d24 can relax to d16 2 bytes
|
||
- Most instructions which accept d16 can relax to d8 1 byte
|
||
|
||
abs24, imm24, d24 all look the same at the reloc level. It
|
||
might make the code simpler if we had different relocs for
|
||
the various relaxable operand types.
|
||
|
||
We don't handle imm16->imm8 or d16->d8 as they're very rare
|
||
and somewhat more difficult to support. */
|
||
|
||
static bfd_boolean
|
||
mn10200_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;
|
||
Elf_Internal_Rela *irel, *irelend;
|
||
bfd_byte *contents = NULL;
|
||
Elf_Internal_Sym *isymbuf = NULL;
|
||
|
||
/* Assume nothing changes. */
|
||
*again = FALSE;
|
||
|
||
/* We don't have to do anything for a relocatable link, if
|
||
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;
|
||
|
||
/* Get a copy of the native relocations. */
|
||
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;
|
||
|
||
/* Walk through them looking for relaxing opportunities. */
|
||
irelend = internal_relocs + sec->reloc_count;
|
||
for (irel = internal_relocs; irel < irelend; irel++)
|
||
{
|
||
bfd_vma symval;
|
||
|
||
/* If this isn't something that can be relaxed, then ignore
|
||
this reloc. */
|
||
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_NONE
|
||
|| ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_8
|
||
|| ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_MAX)
|
||
continue;
|
||
|
||
/* Get the section contents if we haven't done so already. */
|
||
if (contents == NULL)
|
||
{
|
||
/* Get cached copy if it exists. */
|
||
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
||
contents = elf_section_data (sec)->this_hdr.contents;
|
||
else
|
||
{
|
||
/* Go get them off disk. */
|
||
if (!bfd_malloc_and_get_section (abfd, sec, &contents))
|
||
goto error_return;
|
||
}
|
||
}
|
||
|
||
/* Read this BFD's local symbols if we haven't done so already. */
|
||
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;
|
||
}
|
||
|
||
/* Get the value of the symbol referred to by the reloc. */
|
||
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
||
{
|
||
/* A local symbol. */
|
||
Elf_Internal_Sym *isym;
|
||
asection *sym_sec;
|
||
|
||
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);
|
||
symval = (isym->st_value
|
||
+ sym_sec->output_section->vma
|
||
+ sym_sec->output_offset);
|
||
}
|
||
else
|
||
{
|
||
unsigned long indx;
|
||
struct elf_link_hash_entry *h;
|
||
|
||
/* An external symbol. */
|
||
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
|
||
h = elf_sym_hashes (abfd)[indx];
|
||
BFD_ASSERT (h != NULL);
|
||
if (h->root.type != bfd_link_hash_defined
|
||
&& h->root.type != bfd_link_hash_defweak)
|
||
{
|
||
/* This appears to be a reference to an undefined
|
||
symbol. Just ignore it--it will be caught by the
|
||
regular reloc processing. */
|
||
continue;
|
||
}
|
||
|
||
symval = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
}
|
||
|
||
/* For simplicity of coding, we are going to modify the section
|
||
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. */
|
||
|
||
/* Try to turn a 24bit pc-relative branch/call into a 16bit pc-relative
|
||
branch/call. */
|
||
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_PCREL24)
|
||
{
|
||
bfd_vma value = symval;
|
||
|
||
/* Deal with pc-relative gunk. */
|
||
value -= (sec->output_section->vma + sec->output_offset);
|
||
value -= (irel->r_offset + 3);
|
||
value += irel->r_addend;
|
||
|
||
/* See if the value will fit in 16 bits, note the high value is
|
||
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;
|
||
|
||
/* Get the opcode. */
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
||
|
||
if (code != 0xe0 && code != 0xe1)
|
||
continue;
|
||
|
||
/* Note that we've changed the relocs, section contents, etc. */
|
||
elf_section_data (sec)->relocs = internal_relocs;
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
symtab_hdr->contents = (unsigned char *) isymbuf;
|
||
|
||
/* Fix the opcode. */
|
||
if (code == 0xe0)
|
||
bfd_put_8 (abfd, 0xfc, contents + irel->r_offset - 2);
|
||
else if (code == 0xe1)
|
||
bfd_put_8 (abfd, 0xfd, contents + irel->r_offset - 2);
|
||
|
||
/* Fix the relocation's type. */
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_MN10200_PCREL16);
|
||
|
||
/* The opcode got shorter too, so we have to fix the offset. */
|
||
irel->r_offset -= 1;
|
||
|
||
/* Delete two bytes of data. */
|
||
if (!mn10200_elf_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset + 1, 2))
|
||
goto error_return;
|
||
|
||
/* That will change things, so, we should relax again.
|
||
Note that this is not required, and it may be slow. */
|
||
*again = TRUE;
|
||
}
|
||
}
|
||
|
||
/* Try to turn a 16bit pc-relative branch into a 8bit pc-relative
|
||
branch. */
|
||
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_PCREL16)
|
||
{
|
||
bfd_vma value = symval;
|
||
|
||
/* Deal with pc-relative gunk. */
|
||
value -= (sec->output_section->vma + sec->output_offset);
|
||
value -= (irel->r_offset + 2);
|
||
value += irel->r_addend;
|
||
|
||
/* See if the value will fit in 8 bits, note the high value is
|
||
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;
|
||
|
||
/* Get the opcode. */
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
||
|
||
if (code != 0xfc)
|
||
continue;
|
||
|
||
/* Note that we've changed the relocs, section contents, etc. */
|
||
elf_section_data (sec)->relocs = internal_relocs;
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
symtab_hdr->contents = (unsigned char *) isymbuf;
|
||
|
||
/* Fix the opcode. */
|
||
bfd_put_8 (abfd, 0xea, contents + irel->r_offset - 1);
|
||
|
||
/* Fix the relocation's type. */
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_MN10200_PCREL8);
|
||
|
||
/* Delete one byte of data. */
|
||
if (!mn10200_elf_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset + 1, 1))
|
||
goto error_return;
|
||
|
||
/* That will change things, so, we should relax again.
|
||
Note that this is not required, and it may be slow. */
|
||
*again = TRUE;
|
||
}
|
||
}
|
||
|
||
/* Try to eliminate an unconditional 8 bit pc-relative branch
|
||
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_MN10200_PCREL8)
|
||
{
|
||
Elf_Internal_Rela *nrel;
|
||
bfd_vma value = symval;
|
||
unsigned char code;
|
||
|
||
/* Deal with pc-relative gunk. */
|
||
value -= (sec->output_section->vma + sec->output_offset);
|
||
value -= (irel->r_offset + 1);
|
||
value += irel->r_addend;
|
||
|
||
/* Do nothing if this reloc is the last byte in the section. */
|
||
if (irel->r_offset == sec->size)
|
||
continue;
|
||
|
||
/* See if the next instruction is an unconditional pc-relative
|
||
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 != 0xea)
|
||
continue;
|
||
|
||
/* Also make sure the next relocation applies to the next
|
||
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_MN10200_PCREL8)
|
||
continue;
|
||
|
||
/* Make sure our destination immediately follows the
|
||
unconditional branch. */
|
||
if (symval != (sec->output_section->vma + sec->output_offset
|
||
+ irel->r_offset + 3))
|
||
continue;
|
||
|
||
/* Now make sure we are a conditional branch. This may not
|
||
be necessary, but why take the chance.
|
||
|
||
Note these checks assume that R_MN10200_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 != 0xe0 && code != 0xe1 && code != 0xe2
|
||
&& code != 0xe3 && code != 0xe4 && code != 0xe5
|
||
&& code != 0xe6 && code != 0xe7 && code != 0xe8
|
||
&& code != 0xe9 && code != 0xec && code != 0xed
|
||
&& code != 0xee && code != 0xef && code != 0xfc
|
||
&& code != 0xfd && code != 0xfe && code != 0xff)
|
||
continue;
|
||
|
||
/* We also have to be sure there is no symbol/label
|
||
at the unconditional branch. */
|
||
if (mn10200_elf_symbol_address_p (abfd, sec, isymbuf,
|
||
irel->r_offset + 1))
|
||
continue;
|
||
|
||
/* Note that we've changed the relocs, section contents, etc. */
|
||
elf_section_data (sec)->relocs = internal_relocs;
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
symtab_hdr->contents = (unsigned char *) isymbuf;
|
||
|
||
/* Reverse the condition of the first branch. */
|
||
switch (code)
|
||
{
|
||
case 0xfc:
|
||
code = 0xfd;
|
||
break;
|
||
case 0xfd:
|
||
code = 0xfc;
|
||
break;
|
||
case 0xfe:
|
||
code = 0xff;
|
||
break;
|
||
case 0xff:
|
||
code = 0xfe;
|
||
break;
|
||
case 0xe8:
|
||
code = 0xe9;
|
||
break;
|
||
case 0xe9:
|
||
code = 0xe8;
|
||
break;
|
||
case 0xe0:
|
||
code = 0xe2;
|
||
break;
|
||
case 0xe2:
|
||
code = 0xe0;
|
||
break;
|
||
case 0xe3:
|
||
code = 0xe1;
|
||
break;
|
||
case 0xe1:
|
||
code = 0xe3;
|
||
break;
|
||
case 0xe4:
|
||
code = 0xe6;
|
||
break;
|
||
case 0xe6:
|
||
code = 0xe4;
|
||
break;
|
||
case 0xe7:
|
||
code = 0xe5;
|
||
break;
|
||
case 0xe5:
|
||
code = 0xe7;
|
||
break;
|
||
case 0xec:
|
||
code = 0xed;
|
||
break;
|
||
case 0xed:
|
||
code = 0xec;
|
||
break;
|
||
case 0xee:
|
||
code = 0xef;
|
||
break;
|
||
case 0xef:
|
||
code = 0xee;
|
||
break;
|
||
}
|
||
bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
|
||
|
||
/* Set the reloc type and symbol for the first branch
|
||
from the second branch. */
|
||
irel->r_info = nrel->r_info;
|
||
|
||
/* Make the reloc for the second branch a null reloc. */
|
||
nrel->r_info = ELF32_R_INFO (ELF32_R_SYM (nrel->r_info),
|
||
R_MN10200_NONE);
|
||
|
||
/* Delete two bytes of data. */
|
||
if (!mn10200_elf_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset + 1, 2))
|
||
goto error_return;
|
||
|
||
/* That will change things, so, we should relax again.
|
||
Note that this is not required, and it may be slow. */
|
||
*again = TRUE;
|
||
}
|
||
|
||
/* Try to turn a 24bit immediate, displacement or absolute address
|
||
into a 16bit immediate, displacement or absolute address. */
|
||
if (ELF32_R_TYPE (irel->r_info) == (int) R_MN10200_24)
|
||
{
|
||
bfd_vma value = symval;
|
||
|
||
/* See if the value will fit in 16 bits.
|
||
We allow any 16bit match here. We prune those we can't
|
||
handle below. */
|
||
if ((long) value < 0x7fff && (long) value > -0x8000)
|
||
{
|
||
unsigned char code;
|
||
|
||
/* All insns which have 24bit operands are 5 bytes long,
|
||
the first byte will always be 0xf4, but we double check
|
||
it just in case. */
|
||
|
||
/* Get the first opcode. */
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset - 2);
|
||
|
||
if (code != 0xf4)
|
||
continue;
|
||
|
||
/* Get the second opcode. */
|
||
code = bfd_get_8 (abfd, contents + irel->r_offset - 1);
|
||
|
||
switch (code & 0xfc)
|
||
{
|
||
/* mov imm24,dn -> mov imm16,dn */
|
||
case 0x70:
|
||
/* Not safe if the high bit is on as relaxing may
|
||
move the value out of high mem and thus not fit
|
||
in a signed 16bit value. */
|
||
if (value & 0x8000)
|
||
continue;
|
||
|
||
/* Note that we've changed the relocation contents, etc. */
|
||
elf_section_data (sec)->relocs = internal_relocs;
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
symtab_hdr->contents = (unsigned char *) isymbuf;
|
||
|
||
/* Fix the opcode. */
|
||
bfd_put_8 (abfd, 0xf8 + (code & 0x03),
|
||
contents + irel->r_offset - 2);
|
||
|
||
/* Fix the relocation's type. */
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_MN10200_16);
|
||
|
||
/* The opcode got shorter too, so we have to fix the
|
||
offset. */
|
||
irel->r_offset -= 1;
|
||
|
||
/* Delete two bytes of data. */
|
||
if (!mn10200_elf_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset + 1, 2))
|
||
goto error_return;
|
||
|
||
/* That will change things, so, we should relax again.
|
||
Note that this is not required, and it may be slow. */
|
||
*again = TRUE;
|
||
break;
|
||
|
||
/* mov imm24,an -> mov imm16,an
|
||
cmp imm24,an -> cmp imm16,an
|
||
mov (abs24),dn -> mov (abs16),dn
|
||
mov dn,(abs24) -> mov dn,(abs16)
|
||
movb dn,(abs24) -> movb dn,(abs16)
|
||
movbu (abs24),dn -> movbu (abs16),dn */
|
||
case 0x74:
|
||
case 0x7c:
|
||
case 0xc0:
|
||
case 0x40:
|
||
case 0x44:
|
||
case 0xc8:
|
||
/* Note that we've changed the relocation contents, etc. */
|
||
elf_section_data (sec)->relocs = internal_relocs;
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
symtab_hdr->contents = (unsigned char *) isymbuf;
|
||
|
||
if ((code & 0xfc) == 0x74)
|
||
code = 0xdc + (code & 0x03);
|
||
else if ((code & 0xfc) == 0x7c)
|
||
code = 0xec + (code & 0x03);
|
||
else if ((code & 0xfc) == 0xc0)
|
||
code = 0xc8 + (code & 0x03);
|
||
else if ((code & 0xfc) == 0x40)
|
||
code = 0xc0 + (code & 0x03);
|
||
else if ((code & 0xfc) == 0x44)
|
||
code = 0xc4 + (code & 0x03);
|
||
else if ((code & 0xfc) == 0xc8)
|
||
code = 0xcc + (code & 0x03);
|
||
|
||
/* Fix the opcode. */
|
||
bfd_put_8 (abfd, code, contents + irel->r_offset - 2);
|
||
|
||
/* Fix the relocation's type. */
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_MN10200_16);
|
||
|
||
/* The opcode got shorter too, so we have to fix the
|
||
offset. */
|
||
irel->r_offset -= 1;
|
||
|
||
/* Delete two bytes of data. */
|
||
if (!mn10200_elf_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset + 1, 2))
|
||
goto error_return;
|
||
|
||
/* That will change things, so, we should relax again.
|
||
Note that this is not required, and it may be slow. */
|
||
*again = TRUE;
|
||
break;
|
||
|
||
/* cmp imm24,dn -> cmp imm16,dn
|
||
mov (abs24),an -> mov (abs16),an
|
||
mov an,(abs24) -> mov an,(abs16)
|
||
add imm24,dn -> add imm16,dn
|
||
add imm24,an -> add imm16,an
|
||
sub imm24,dn -> sub imm16,dn
|
||
sub imm24,an -> sub imm16,an
|
||
And all d24->d16 in memory ops. */
|
||
case 0x78:
|
||
case 0xd0:
|
||
case 0x50:
|
||
case 0x60:
|
||
case 0x64:
|
||
case 0x68:
|
||
case 0x6c:
|
||
case 0x80:
|
||
case 0xf0:
|
||
case 0x00:
|
||
case 0x10:
|
||
case 0xb0:
|
||
case 0x30:
|
||
case 0xa0:
|
||
case 0x20:
|
||
case 0x90:
|
||
/* Not safe if the high bit is on as relaxing may
|
||
move the value out of high mem and thus not fit
|
||
in a signed 16bit value. */
|
||
if (((code & 0xfc) == 0x78
|
||
|| (code & 0xfc) == 0x60
|
||
|| (code & 0xfc) == 0x64
|
||
|| (code & 0xfc) == 0x68
|
||
|| (code & 0xfc) == 0x6c
|
||
|| (code & 0xfc) == 0x80
|
||
|| (code & 0xfc) == 0xf0
|
||
|| (code & 0xfc) == 0x00
|
||
|| (code & 0xfc) == 0x10
|
||
|| (code & 0xfc) == 0xb0
|
||
|| (code & 0xfc) == 0x30
|
||
|| (code & 0xfc) == 0xa0
|
||
|| (code & 0xfc) == 0x20
|
||
|| (code & 0xfc) == 0x90)
|
||
&& (value & 0x8000) != 0)
|
||
continue;
|
||
|
||
/* Note that we've changed the relocation contents, etc. */
|
||
elf_section_data (sec)->relocs = internal_relocs;
|
||
elf_section_data (sec)->this_hdr.contents = contents;
|
||
symtab_hdr->contents = (unsigned char *) isymbuf;
|
||
|
||
/* Fix the opcode. */
|
||
bfd_put_8 (abfd, 0xf7, contents + irel->r_offset - 2);
|
||
|
||
if ((code & 0xfc) == 0x78)
|
||
code = 0x48 + (code & 0x03);
|
||
else if ((code & 0xfc) == 0xd0)
|
||
code = 0x30 + (code & 0x03);
|
||
else if ((code & 0xfc) == 0x50)
|
||
code = 0x20 + (code & 0x03);
|
||
else if ((code & 0xfc) == 0x60)
|
||
code = 0x18 + (code & 0x03);
|
||
else if ((code & 0xfc) == 0x64)
|
||
code = 0x08 + (code & 0x03);
|
||
else if ((code & 0xfc) == 0x68)
|
||
code = 0x1c + (code & 0x03);
|
||
else if ((code & 0xfc) == 0x6c)
|
||
code = 0x0c + (code & 0x03);
|
||
else if ((code & 0xfc) == 0x80)
|
||
code = 0xc0 + (code & 0x07);
|
||
else if ((code & 0xfc) == 0xf0)
|
||
code = 0xb0 + (code & 0x07);
|
||
else if ((code & 0xfc) == 0x00)
|
||
code = 0x80 + (code & 0x07);
|
||
else if ((code & 0xfc) == 0x10)
|
||
code = 0xa0 + (code & 0x07);
|
||
else if ((code & 0xfc) == 0xb0)
|
||
code = 0x70 + (code & 0x07);
|
||
else if ((code & 0xfc) == 0x30)
|
||
code = 0x60 + (code & 0x07);
|
||
else if ((code & 0xfc) == 0xa0)
|
||
code = 0xd0 + (code & 0x07);
|
||
else if ((code & 0xfc) == 0x20)
|
||
code = 0x90 + (code & 0x07);
|
||
else if ((code & 0xfc) == 0x90)
|
||
code = 0x50 + (code & 0x07);
|
||
|
||
bfd_put_8 (abfd, code, contents + irel->r_offset - 1);
|
||
|
||
/* Fix the relocation's type. */
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_MN10200_16);
|
||
|
||
/* Delete one bytes of data. */
|
||
if (!mn10200_elf_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset + 2, 1))
|
||
goto error_return;
|
||
|
||
/* That will change things, so, we should relax again.
|
||
Note that this is not required, and it may be slow. */
|
||
*again = TRUE;
|
||
break;
|
||
|
||
/* movb (abs24),dn ->movbu (abs16),dn extxb bn */
|
||
case 0xc4:
|
||
/* Note that we've changed the reldection contents, 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, 0xcc + (code & 0x03),
|
||
contents + irel->r_offset - 2);
|
||
|
||
bfd_put_8 (abfd, 0xb8 + (code & 0x03),
|
||
contents + irel->r_offset - 1);
|
||
|
||
/* Fix the relocation's type. */
|
||
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
|
||
R_MN10200_16);
|
||
|
||
/* The reloc will be applied one byte in front of its
|
||
current location. */
|
||
irel->r_offset -= 1;
|
||
|
||
/* Delete one bytes of data. */
|
||
if (!mn10200_elf_relax_delete_bytes (abfd, sec,
|
||
irel->r_offset + 2, 1))
|
||
goto error_return;
|
||
|
||
/* That will change things, so, we should relax again.
|
||
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
|
||
{
|
||
/* Cache the symbols for elf_link_input_bfd. */
|
||
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
|
||
{
|
||
/* Cache the section contents for elf_link_input_bfd. */
|
||
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 (sec)->this_hdr.contents != contents)
|
||
free (contents);
|
||
if (internal_relocs != NULL
|
||
&& elf_section_data (sec)->relocs != internal_relocs)
|
||
free (internal_relocs);
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
/* Delete some bytes from a section while relaxing. */
|
||
|
||
static bfd_boolean
|
||
mn10200_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;
|
||
bfd_vma toaddr;
|
||
Elf_Internal_Sym *isym;
|
||
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);
|
||
|
||
contents = elf_section_data (sec)->this_hdr.contents;
|
||
|
||
toaddr = sec->size;
|
||
|
||
irel = elf_section_data (sec)->relocs;
|
||
irelend = irel + sec->reloc_count;
|
||
|
||
/* Actually delete the bytes. */
|
||
memmove (contents + addr, contents + addr + count,
|
||
(size_t) (toaddr - addr - count));
|
||
sec->size -= count;
|
||
|
||
/* Adjust all the relocs. */
|
||
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
|
||
{
|
||
/* Get the new reloc address. */
|
||
if ((irel->r_offset > addr
|
||
&& irel->r_offset < toaddr))
|
||
irel->r_offset -= count;
|
||
}
|
||
|
||
/* Adjust the local symbols defined in this section. */
|
||
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;
|
||
}
|
||
|
||
/* Now adjust the global symbols defined in this section. */
|
||
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;
|
||
}
|
||
|
||
/* Return TRUE if a symbol exists at the given address, else return
|
||
FALSE. */
|
||
static bfd_boolean
|
||
mn10200_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);
|
||
|
||
/* Examine all the local symbols. */
|
||
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;
|
||
}
|
||
|
||
/* This is a version of bfd_generic_get_relocated_section_contents
|
||
which uses mn10200_elf_relocate_section. */
|
||
|
||
static bfd_byte *
|
||
mn10200_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;
|
||
|
||
/* We only need to handle the case of relaxing, or of having a
|
||
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)
|
||
{
|
||
Elf_Internal_Sym *isym;
|
||
Elf_Internal_Sym *isymend;
|
||
asection **secpp;
|
||
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 (! mn10200_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 (elf_section_data (input_section)->relocs != internal_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
|
||
&& elf_section_data (input_section)->relocs != internal_relocs)
|
||
free (internal_relocs);
|
||
return NULL;
|
||
}
|
||
|
||
#define TARGET_LITTLE_SYM bfd_elf32_mn10200_vec
|
||
#define TARGET_LITTLE_NAME "elf32-mn10200"
|
||
#define ELF_ARCH bfd_arch_mn10200
|
||
#define ELF_MACHINE_CODE EM_MN10200
|
||
#define ELF_MACHINE_ALT1 EM_CYGNUS_MN10200
|
||
#define ELF_MAXPAGESIZE 0x1000
|
||
|
||
#define elf_backend_rela_normal 1
|
||
#define elf_info_to_howto mn10200_info_to_howto
|
||
#define elf_info_to_howto_rel 0
|
||
#define elf_backend_relocate_section mn10200_elf_relocate_section
|
||
#define bfd_elf32_bfd_relax_section mn10200_elf_relax_section
|
||
#define bfd_elf32_bfd_get_relocated_section_contents \
|
||
mn10200_elf_get_relocated_section_contents
|
||
|
||
#define elf_symbol_leading_char '_'
|
||
|
||
#include "elf32-target.h"
|