darling-gdb/bfd/aout-arm.c

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1999-05-03 07:29:11 +00:00
/* BFD back-end for raw ARM a.out binaries.
Copyright 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002
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Free Software Foundation, Inc.
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Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
1999-05-03 07:29:11 +00:00
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "bfd.h"
#include "sysdep.h"
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/* Avoid multiple defininitions from aoutx if supporting standarad a.out
as well as our own. */
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/* Do not "beautify" the CONCAT* macro args. Traditional C will not
remove whitespace added here, and thus will fail to concatenate
the tokens. */
#define NAME(x,y) CONCAT3 (aoutarm,_32_,y)
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#define N_TXTADDR(x) \
((N_MAGIC (x) == NMAGIC) \
? (bfd_vma) 0x8000 \
: ((N_MAGIC (x) != ZMAGIC) \
? (bfd_vma) 0 \
: ((N_SHARED_LIB (x)) \
? ((x).a_entry & ~(bfd_vma) (TARGET_PAGE_SIZE - 1)) \
: (bfd_vma) TEXT_START_ADDR)))
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#define TEXT_START_ADDR 0x8000
#define TARGET_PAGE_SIZE 0x8000
#define SEGMENT_SIZE TARGET_PAGE_SIZE
#define DEFAULT_ARCH bfd_arch_arm
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#define MY(OP) CONCAT2 (aoutarm_,OP)
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#define N_BADMAG(x) ((((x).a_info & ~007200) != ZMAGIC) && \
(((x).a_info & ~006000) != OMAGIC) && \
((x).a_info != NMAGIC))
#define N_MAGIC(x) ((x).a_info & ~07200)
#define MY_bfd_reloc_type_lookup aoutarm_bfd_reloc_type_lookup
#include "libaout.h"
#include "aout/aout64.h"
static bfd_boolean MY(write_object_contents)
PARAMS ((bfd *));
static bfd_reloc_status_type MY(fix_pcrel_26_done)
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
static bfd_reloc_status_type MY(fix_pcrel_26)
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
static void MY(swap_std_reloc_in)
PARAMS ((bfd *, struct reloc_std_external *, arelent *, asymbol **,
bfd_size_type));
reloc_howto_type *MY(bfd_reloc_type_lookup)
PARAMS ((bfd *, bfd_reloc_code_real_type));
reloc_howto_type * MY(reloc_howto)
PARAMS ((bfd *, struct reloc_std_external *, int *, int *, int *));
void MY(put_reloc)
PARAMS ((bfd *, int, int, bfd_vma, reloc_howto_type *,
struct reloc_std_external *));
void MY(relocatable_reloc)
PARAMS ((reloc_howto_type *, bfd *, struct reloc_std_external *, bfd_vma *,
bfd_vma));
void MY(swap_std_reloc_out)
PARAMS ((bfd *, arelent *, struct reloc_std_external *));
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reloc_howto_type MY(howto_table)[] =
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{
/* Type rs size bsz pcrel bitpos ovrf sf name part_inpl
readmask setmask pcdone. */
HOWTO (0, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, 0, "8", TRUE,
0x000000ff, 0x000000ff, FALSE),
HOWTO (1, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, 0, "16", TRUE,
0x0000ffff, 0x0000ffff, FALSE),
HOWTO (2, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, 0, "32", TRUE,
0xffffffff, 0xffffffff, FALSE),
HOWTO (3, 2, 2, 26, TRUE, 0, complain_overflow_signed, MY(fix_pcrel_26),
"ARM26", TRUE, 0x00ffffff, 0x00ffffff, TRUE),
HOWTO (4, 0, 0, 8, TRUE, 0, complain_overflow_signed, 0, "DISP8", TRUE,
0x000000ff, 0x000000ff, TRUE),
HOWTO (5, 0, 1, 16, TRUE, 0, complain_overflow_signed, 0, "DISP16", TRUE,
0x0000ffff, 0x0000ffff, TRUE),
HOWTO (6, 0, 2, 32, TRUE, 0, complain_overflow_signed, 0, "DISP32", TRUE,
0xffffffff, 0xffffffff, TRUE),
HOWTO (7, 2, 2, 26, FALSE, 0, complain_overflow_signed,
MY(fix_pcrel_26_done), "ARM26D", TRUE, 0x0, 0x0,
FALSE),
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EMPTY_HOWTO (-1),
HOWTO (9, 0, -1, 16, FALSE, 0, complain_overflow_bitfield, 0, "NEG16", TRUE,
0x0000ffff, 0x0000ffff, FALSE),
HOWTO (10, 0, -2, 32, FALSE, 0, complain_overflow_bitfield, 0, "NEG32", TRUE,
0xffffffff, 0xffffffff, FALSE)
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};
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#define RELOC_ARM_BITS_NEG_BIG ((unsigned int) 0x08)
#define RELOC_ARM_BITS_NEG_LITTLE ((unsigned int) 0x10)
reloc_howto_type *
MY(reloc_howto) (abfd, rel, r_index, r_extern, r_pcrel)
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bfd *abfd;
struct reloc_std_external *rel;
int *r_index;
int *r_extern;
int *r_pcrel;
{
unsigned int r_length;
unsigned int r_pcrel_done;
unsigned int r_neg;
int index;
*r_pcrel = 0;
if (bfd_header_big_endian (abfd))
{
*r_index = ((rel->r_index[0] << 16)
| (rel->r_index[1] << 8)
| rel->r_index[2]);
*r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
r_pcrel_done = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
r_neg = (0 != (rel->r_type[0] & RELOC_ARM_BITS_NEG_BIG));
r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
>> RELOC_STD_BITS_LENGTH_SH_BIG);
}
else
{
*r_index = ((rel->r_index[2] << 16)
| (rel->r_index[1] << 8)
| rel->r_index[0]);
*r_extern = (0 != (rel->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
r_pcrel_done = (0 != (rel->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
r_neg = (0 != (rel->r_type[0] & RELOC_ARM_BITS_NEG_LITTLE));
r_length = ((rel->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
>> RELOC_STD_BITS_LENGTH_SH_LITTLE);
}
index = r_length + 4 * r_pcrel_done + 8 * r_neg;
if (index == 3)
*r_pcrel = 1;
return MY(howto_table) + index;
}
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#define MY_reloc_howto(BFD, REL, IN, EX, PC) \
MY(reloc_howto) (BFD, REL, &IN, &EX, &PC)
void
MY(put_reloc) (abfd, r_extern, r_index, value, howto, reloc)
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bfd *abfd;
int r_extern;
int r_index;
bfd_vma value;
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reloc_howto_type *howto;
struct reloc_std_external *reloc;
{
unsigned int r_length;
int r_pcrel;
int r_neg;
PUT_WORD (abfd, value, reloc->r_address);
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/* Size as a power of two. */
r_length = howto->size;
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/* Special case for branch relocations. */
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if (howto->type == 3 || howto->type == 7)
r_length = 3;
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r_pcrel = howto->type & 4; /* PC Relative done? */
r_neg = howto->type & 8; /* Negative relocation. */
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if (bfd_header_big_endian (abfd))
{
reloc->r_index[0] = r_index >> 16;
reloc->r_index[1] = r_index >> 8;
reloc->r_index[2] = r_index;
reloc->r_type[0] =
((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
| (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
| (r_neg ? RELOC_ARM_BITS_NEG_BIG : 0)
| (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
}
else
{
reloc->r_index[2] = r_index >> 16;
reloc->r_index[1] = r_index >> 8;
reloc->r_index[0] = r_index;
reloc->r_type[0] =
((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
| (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
| (r_neg ? RELOC_ARM_BITS_NEG_LITTLE : 0)
| (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
}
}
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#define MY_put_reloc(BFD, EXT, IDX, VAL, HOWTO, RELOC) \
MY(put_reloc) (BFD, EXT, IDX, VAL, HOWTO, RELOC)
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void
MY(relocatable_reloc) (howto, abfd, reloc, amount, r_addr)
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reloc_howto_type *howto;
bfd *abfd;
struct reloc_std_external *reloc;
bfd_vma *amount;
bfd_vma r_addr;
{
if (howto->type == 3)
{
if (reloc->r_type[0]
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& (bfd_header_big_endian (abfd)
? RELOC_STD_BITS_EXTERN_BIG : RELOC_STD_BITS_EXTERN_LITTLE))
{
/* The reloc is still external, so don't modify anything. */
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*amount = 0;
}
else
{
*amount -= r_addr;
/* Change the r_pcrel value -- on the ARM, this bit is set once the
relocation is done. */
if (bfd_header_big_endian (abfd))
reloc->r_type[0] |= RELOC_STD_BITS_PCREL_BIG;
else
reloc->r_type[0] |= RELOC_STD_BITS_PCREL_LITTLE;
}
}
else if (howto->type == 7)
*amount = 0;
}
#define MY_relocatable_reloc(HOW, BFD, REL, AMOUNT, ADDR) \
MY(relocatable_reloc) (HOW, BFD, REL, &(AMOUNT), ADDR)
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static bfd_reloc_status_type
MY(fix_pcrel_26_done) (abfd, reloc_entry, symbol, data, input_section,
output_bfd, error_message)
bfd *abfd ATTRIBUTE_UNUSED;
arelent *reloc_entry ATTRIBUTE_UNUSED;
asymbol *symbol ATTRIBUTE_UNUSED;
PTR data ATTRIBUTE_UNUSED;
asection *input_section ATTRIBUTE_UNUSED;
bfd *output_bfd ATTRIBUTE_UNUSED;
char **error_message ATTRIBUTE_UNUSED;
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{
/* This is dead simple at present. */
return bfd_reloc_ok;
}
static bfd_reloc_status_type
MY(fix_pcrel_26) (abfd, reloc_entry, symbol, data, input_section,
output_bfd, error_message)
bfd *abfd;
arelent *reloc_entry;
asymbol *symbol;
PTR data;
asection *input_section;
bfd *output_bfd;
char **error_message ATTRIBUTE_UNUSED;
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{
bfd_vma relocation;
bfd_size_type addr = reloc_entry->address;
bfd_vma target = bfd_get_32 (abfd, (bfd_byte *) data + addr);
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bfd_reloc_status_type flag = bfd_reloc_ok;
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/* If this is an undefined symbol, return error. */
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if (symbol->section == &bfd_und_section
&& (symbol->flags & BSF_WEAK) == 0)
return output_bfd ? bfd_reloc_ok : bfd_reloc_undefined;
/* If the sections are different, and we are doing a partial relocation,
just ignore it for now. */
if (symbol->section->name != input_section->name
&& output_bfd != (bfd *)NULL)
return bfd_reloc_ok;
relocation = (target & 0x00ffffff) << 2;
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relocation = (relocation ^ 0x02000000) - 0x02000000; /* Sign extend. */
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relocation += symbol->value;
relocation += symbol->section->output_section->vma;
relocation += symbol->section->output_offset;
relocation += reloc_entry->addend;
relocation -= input_section->output_section->vma;
relocation -= input_section->output_offset;
relocation -= addr;
if (relocation & 3)
return bfd_reloc_overflow;
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/* Check for overflow. */
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if (relocation & 0x02000000)
{
if ((relocation & ~ (bfd_vma) 0x03ffffff) != ~ (bfd_vma) 0x03ffffff)
flag = bfd_reloc_overflow;
}
else if (relocation & ~ (bfd_vma) 0x03ffffff)
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flag = bfd_reloc_overflow;
target &= ~ (bfd_vma) 0x00ffffff;
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target |= (relocation >> 2) & 0x00ffffff;
bfd_put_32 (abfd, target, (bfd_byte *) data + addr);
/* Now the ARM magic... Change the reloc type so that it is marked as done.
Strictly this is only necessary if we are doing a partial relocation. */
reloc_entry->howto = &MY(howto_table)[7];
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return flag;
}
reloc_howto_type *
MY(bfd_reloc_type_lookup) (abfd,code)
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bfd *abfd;
bfd_reloc_code_real_type code;
{
#define ASTD(i,j) case i: return &MY(howto_table)[j]
if (code == BFD_RELOC_CTOR)
switch (bfd_get_arch_info (abfd)->bits_per_address)
{
case 32:
code = BFD_RELOC_32;
break;
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default:
return (const struct reloc_howto_struct *) 0;
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}
switch (code)
{
ASTD (BFD_RELOC_16, 1);
ASTD (BFD_RELOC_32, 2);
ASTD (BFD_RELOC_ARM_PCREL_BRANCH, 3);
ASTD (BFD_RELOC_8_PCREL, 4);
ASTD (BFD_RELOC_16_PCREL, 5);
ASTD (BFD_RELOC_32_PCREL, 6);
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default:
return (const struct reloc_howto_struct *) 0;
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}
}
#define MY_swap_std_reloc_in MY(swap_std_reloc_in)
#define MY_swap_std_reloc_out MY(swap_std_reloc_out)
#define MY_get_section_contents _bfd_generic_get_section_contents
/* #define MY_bfd_link_hash_table_create _bfd_generic_link_hash_table_create */
/* #define MY_bfd_link_add_symbols _bfd_generic_link_add_symbols */
/* #define MY_bfd_final_link _bfd_generic_final_link */
#include "aoutx.h"
static void
MY_swap_std_reloc_in (abfd, bytes, cache_ptr, symbols, symcount)
bfd *abfd;
struct reloc_std_external *bytes;
arelent *cache_ptr;
asymbol **symbols;
bfd_size_type symcount ATTRIBUTE_UNUSED;
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{
int r_index;
int r_extern;
int r_pcrel;
struct aoutdata *su = &(abfd->tdata.aout_data->a);
cache_ptr->address = H_GET_32 (abfd, bytes->r_address);
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cache_ptr->howto = MY_reloc_howto (abfd, bytes, r_index, r_extern, r_pcrel);
MOVE_ADDRESS (0);
}
void
MY_swap_std_reloc_out (abfd, g, natptr)
bfd *abfd;
arelent *g;
struct reloc_std_external *natptr;
{
int r_index;
asymbol *sym = *(g->sym_ptr_ptr);
int r_extern;
int r_length;
int r_pcrel;
int r_neg = 0; /* Negative relocs use the BASEREL bit. */
asection *output_section = sym->section->output_section;
PUT_WORD(abfd, g->address, natptr->r_address);
r_length = g->howto->size ; /* Size as a power of two */
if (r_length < 0)
{
r_length = -r_length;
r_neg = 1;
}
r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
/* For RISC iX, in pc-relative relocs the r_pcrel bit means that the
relocation has been done already (Only for the 26-bit one I think)???!!!
*/
if (g->howto->type == 3)
{
r_length = 3;
r_pcrel = 0;
}
else if (g->howto->type == 7)
{
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r_length = 3;
r_pcrel = 1;
}
#if 0
/* For a standard reloc, the addend is in the object file. */
r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
#endif
/* name was clobbered by aout_write_syms to be symbol index */
/* If this relocation is relative to a symbol then set the
r_index to the symbols index, and the r_extern bit.
Absolute symbols can come in in two ways, either as an offset
from the abs section, or as a symbol which has an abs value.
check for that here
*/
if (bfd_is_com_section (output_section)
|| output_section == &bfd_abs_section
|| output_section == &bfd_und_section)
{
if (bfd_abs_section.symbol == sym)
{
/* Whoops, looked like an abs symbol, but is really an offset
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from the abs section. */
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r_index = 0;
r_extern = 0;
}
else
{
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/* Fill in symbol. */
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r_extern = 1;
r_index = (*(g->sym_ptr_ptr))->KEEPIT;
}
}
else
{
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/* Just an ordinary section. */
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r_extern = 0;
r_index = output_section->target_index;
}
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/* Now the fun stuff. */
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if (bfd_header_big_endian (abfd))
{
natptr->r_index[0] = r_index >> 16;
natptr->r_index[1] = r_index >> 8;
natptr->r_index[2] = r_index;
natptr->r_type[0] =
( (r_extern ? RELOC_STD_BITS_EXTERN_BIG: 0)
| (r_pcrel ? RELOC_STD_BITS_PCREL_BIG: 0)
| (r_neg ? RELOC_ARM_BITS_NEG_BIG: 0)
| (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
}
else
{
natptr->r_index[2] = r_index >> 16;
natptr->r_index[1] = r_index >> 8;
natptr->r_index[0] = r_index;
natptr->r_type[0] =
( (r_extern ? RELOC_STD_BITS_EXTERN_LITTLE: 0)
| (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE: 0)
| (r_neg ? RELOC_ARM_BITS_NEG_LITTLE: 0)
| (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
}
}
#define MY_BFD_TARGET
#include "aout-target.h"
extern const bfd_target aout_arm_big_vec;
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const bfd_target aout_arm_little_vec =
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{
"a.out-arm-little", /* name */
bfd_target_aout_flavour,
BFD_ENDIAN_LITTLE, /* target byte order (little) */
BFD_ENDIAN_LITTLE, /* target headers byte order (little) */
(HAS_RELOC | EXEC_P | /* object flags */
HAS_LINENO | HAS_DEBUG |
HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
MY_symbol_leading_char,
AR_PAD_CHAR, /* ar_pad_char */
15, /* ar_max_namelen */
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
{_bfd_dummy_target, MY_object_p, /* bfd_check_format */
bfd_generic_archive_p, MY_core_file_p},
{bfd_false, MY_mkobject, /* bfd_set_format */
_bfd_generic_mkarchive, bfd_false},
{bfd_false, MY_write_object_contents, /* bfd_write_contents */
_bfd_write_archive_contents, bfd_false},
BFD_JUMP_TABLE_GENERIC (MY),
BFD_JUMP_TABLE_COPY (MY),
BFD_JUMP_TABLE_CORE (MY),
BFD_JUMP_TABLE_ARCHIVE (MY),
BFD_JUMP_TABLE_SYMBOLS (MY),
BFD_JUMP_TABLE_RELOCS (MY),
BFD_JUMP_TABLE_WRITE (MY),
BFD_JUMP_TABLE_LINK (MY),
BFD_JUMP_TABLE_DYNAMIC (MY),
& aout_arm_big_vec,
(PTR) MY_backend_data,
};
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const bfd_target aout_arm_big_vec =
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{
"a.out-arm-big", /* name */
bfd_target_aout_flavour,
BFD_ENDIAN_BIG, /* target byte order (big) */
BFD_ENDIAN_BIG, /* target headers byte order (big) */
(HAS_RELOC | EXEC_P | /* object flags */
HAS_LINENO | HAS_DEBUG |
HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
MY_symbol_leading_char,
AR_PAD_CHAR, /* ar_pad_char */
15, /* ar_max_namelen */
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
{_bfd_dummy_target, MY_object_p, /* bfd_check_format */
bfd_generic_archive_p, MY_core_file_p},
{bfd_false, MY_mkobject, /* bfd_set_format */
_bfd_generic_mkarchive, bfd_false},
{bfd_false, MY_write_object_contents, /* bfd_write_contents */
_bfd_write_archive_contents, bfd_false},
BFD_JUMP_TABLE_GENERIC (MY),
BFD_JUMP_TABLE_COPY (MY),
BFD_JUMP_TABLE_CORE (MY),
BFD_JUMP_TABLE_ARCHIVE (MY),
BFD_JUMP_TABLE_SYMBOLS (MY),
BFD_JUMP_TABLE_RELOCS (MY),
BFD_JUMP_TABLE_WRITE (MY),
BFD_JUMP_TABLE_LINK (MY),
BFD_JUMP_TABLE_DYNAMIC (MY),
2001-08-14 10:01:29 +00:00
& aout_arm_little_vec,
(PTR) MY_backend_data,
};