Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1999, 2000, 2001, 2002,
2003, 2004, 2005 Free Software Foundation, Inc.
Created mostly by substituting "860" for "386" in coff-i386.c
Harry Dolan <dolan@ssd.intel.com>, October 1995
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 "coff/i860.h"
#include "coff/internal.h"
#include "libcoff.h"
#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
#define COFF_PAGE_SIZE 0x1000
section for a reference to a common symbol is the value itself plus
any desired offset. Ian Taylor, Cygnus Support. */
adjustments to the object file that are not done by the
bfd_perform_relocation function. This function is called by every
reloc type to make any required adjustments. */
static bfd_reloc_status_type
coff_i860_reloc (bfd *abfd,
arelent *reloc_entry,
asymbol *symbol,
void *data,
asection *input_section ATTRIBUTE_UNUSED,
bfd *output_bfd,
char **error_message ATTRIBUTE_UNUSED)
{
symvalue diff;
if (output_bfd == (bfd *) NULL)
return bfd_reloc_continue;
if (bfd_is_com_section (symbol->section))
{
object file is ORIG + OFFSET, where ORIG is the value of the
common symbol as seen by the object file when it was compiled
(this may be zero if the symbol was undefined) and OFFSET is
the offset into the common symbol (normally zero, but may be
non-zero when referring to a field in a common structure).
ORIG is the negative of reloc_entry->addend, which is set by
the CALC_ADDEND macro below. We want to replace the value in
the object file with NEW + OFFSET, where NEW is the value of
the common symbol which we are going to put in the final
object file. NEW is symbol->value. */
diff = symbol->value + reloc_entry->addend;
}
else
{
ignores the addend for a COFF target when producing
relocatable output. This seems to be always wrong for 860
COFF, so we handle the addend here instead. */
diff = reloc_entry->addend;
}
#define DOIT(x) \
x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask))
if (diff != 0)
{
reloc_howto_type *howto = reloc_entry->howto;
unsigned char *addr = (unsigned char *) data + reloc_entry->address;
switch (howto->size)
{
case 0:
{
char x = bfd_get_8 (abfd, addr);
DOIT (x);
bfd_put_8 (abfd, x, addr);
}
break;
case 1:
{
short x = bfd_get_16 (abfd, addr);
DOIT (x);
bfd_put_16 (abfd, (bfd_vma) x, addr);
}
break;
case 2:
{
long x = bfd_get_32 (abfd, addr);
DOIT (x);
bfd_put_32 (abfd, (bfd_vma) x, addr);
}
break;
default:
abort ();
}
}
return bfd_reloc_continue;
}
these relocations. */
static bfd_reloc_status_type
coff_i860_reloc_nyi (bfd *abfd ATTRIBUTE_UNUSED,
arelent *reloc_entry,
asymbol *symbol ATTRIBUTE_UNUSED,
void *data ATTRIBUTE_UNUSED,
asection *input_section ATTRIBUTE_UNUSED,
bfd *output_bfd ATTRIBUTE_UNUSED,
char **error_message ATTRIBUTE_UNUSED)
{
reloc_howto_type *howto = reloc_entry->howto;
fprintf (stderr, _("Relocation `%s' not yet implemented\n"), howto->name);
return bfd_reloc_notsupported;
}
#ifndef PCRELOFFSET
#define PCRELOFFSET FALSE
#endif
static reloc_howto_type howto_table[] =
{
EMPTY_HOWTO (0),
EMPTY_HOWTO (1),
EMPTY_HOWTO (2),
EMPTY_HOWTO (3),
EMPTY_HOWTO (4),
EMPTY_HOWTO (5),
HOWTO (R_DIR32,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
coff_i860_reloc,
"dir32",
TRUE,
0xffffffff,
0xffffffff,
TRUE),
HOWTO (R_IMAGEBASE,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
coff_i860_reloc,
"rva32",
TRUE,
0xffffffff,
0xffffffff,
FALSE),
EMPTY_HOWTO (010),
EMPTY_HOWTO (011),
EMPTY_HOWTO (012),
EMPTY_HOWTO (013),
EMPTY_HOWTO (014),
EMPTY_HOWTO (015),
EMPTY_HOWTO (016),
HOWTO (R_RELBYTE,
0,
0,
8,
FALSE,
0,
complain_overflow_bitfield,
coff_i860_reloc,
"8",
TRUE,
0x000000ff,
0x000000ff,
PCRELOFFSET),
HOWTO (R_RELWORD,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
coff_i860_reloc,
"16",
TRUE,
0x0000ffff,
0x0000ffff,
PCRELOFFSET),
HOWTO (R_RELLONG,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
coff_i860_reloc,
"32",
TRUE,
0xffffffff,
0xffffffff,
PCRELOFFSET),
HOWTO (R_PCRBYTE,
0,
0,
8,
TRUE,
0,
complain_overflow_signed,
coff_i860_reloc,
"DISP8",
TRUE,
0x000000ff,
0x000000ff,
PCRELOFFSET),
HOWTO (R_PCRWORD,
0,
1,
16,
TRUE,
0,
complain_overflow_signed,
coff_i860_reloc,
"DISP16",
TRUE,
0x0000ffff,
0x0000ffff,
PCRELOFFSET),
HOWTO (R_PCRLONG,
0,
2,
32,
TRUE,
0,
complain_overflow_signed,
coff_i860_reloc,
"DISP32",
TRUE,
0xffffffff,
0xffffffff,
PCRELOFFSET),
EMPTY_HOWTO (0x15),
EMPTY_HOWTO (0x16),
EMPTY_HOWTO (0x17),
EMPTY_HOWTO (0x18),
EMPTY_HOWTO (0x19),
EMPTY_HOWTO (0x1a),
EMPTY_HOWTO (0x1b),
HOWTO (COFF860_R_PAIR,
0,
2,
16,
FALSE,
0,
complain_overflow_dont,
coff_i860_reloc_nyi,
"PAIR",
FALSE,
0xffff,
0xffff,
FALSE),
EMPTY_HOWTO (0x1d),
HOWTO (COFF860_R_HIGH,
16,
2,
16,
FALSE,
0,
complain_overflow_dont,
coff_i860_reloc,
"HIGH",
FALSE,
0xffff,
0xffff,
FALSE),
HOWTO (COFF860_R_LOW0,
0,
2,
16,
FALSE,
0,
complain_overflow_dont,
coff_i860_reloc,
"LOW0",
FALSE,
0xffff,
0xffff,
FALSE),
HOWTO (COFF860_R_LOW1,
0,
2,
16,
FALSE,
0,
complain_overflow_dont,
coff_i860_reloc,
"LOW1",
FALSE,
0xfffe,
0xfffe,
FALSE),
HOWTO (COFF860_R_LOW2,
0,
2,
16,
FALSE,
0,
complain_overflow_dont,
coff_i860_reloc,
"LOW2",
FALSE,
0xfffc,
0xfffc,
FALSE),
HOWTO (COFF860_R_LOW3,
0,
2,
16,
FALSE,
0,
complain_overflow_dont,
coff_i860_reloc,
"LOW3",
FALSE,
0xfff8,
0xfff8,
FALSE),
HOWTO (COFF860_R_LOW4,
0,
2,
16,
FALSE,
0,
complain_overflow_dont,
coff_i860_reloc,
"LOW4",
FALSE,
0xfff0,
0xfff0,
FALSE),
HOWTO (COFF860_R_SPLIT0,
0,
2,
16,
FALSE,
0,
complain_overflow_dont,
coff_i860_reloc_nyi,
"SPLIT0",
FALSE,
0x1f07ff,
0x1f07ff,
FALSE),
HOWTO (COFF860_R_SPLIT1,
0,
2,
16,
FALSE,
0,
complain_overflow_dont,
coff_i860_reloc_nyi,
"SPLIT1",
FALSE,
0x1f07fe,
0x1f07fe,
FALSE),
HOWTO (COFF860_R_SPLIT2,
0,
2,
16,
FALSE,
0,
complain_overflow_dont,
coff_i860_reloc_nyi,
"SPLIT2",
FALSE,
0x1f07fc,
0x1f07fc,
FALSE),
HOWTO (COFF860_R_HIGHADJ,
0,
2,
16,
FALSE,
0,
complain_overflow_dont,
coff_i860_reloc_nyi,
"HIGHADJ",
FALSE,
0xffff,
0xffff,
FALSE),
HOWTO (COFF860_R_BRADDR,
2,
2,
26,
TRUE,
0,
complain_overflow_bitfield,
coff_i860_reloc_nyi,
"BRADDR",
FALSE,
0x3ffffff,
0x3ffffff,
TRUE)
};
#define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
#define BADMAG(x) I860BADMAG(x)
#define I860 1 /* Customize coffcode.h */
#define RTYPE2HOWTO(cache_ptr, dst) \
((cache_ptr)->howto = \
((dst)->r_type < sizeof (howto_table) / sizeof (howto_table[0]) \
? howto_table + (dst)->r_type \
: NULL))
library. On some other COFF targets STYP_BSS is normally
STYP_NOLOAD. */
#define BSS_NOLOAD_IS_SHARED_LIBRARY
the object file contains the value of the common symbol. By the
time this is called, the linker may be using a different symbol
from a different object file with a different value. Therefore, we
hack wildly to locate the original symbol from this file so that we
can make the correct adjustment. This macro sets coffsym to the
symbol from the original file, and uses it to set the addend value
correctly. If this is not a common symbol, the usual addend
calculation is done, except that an additional tweak is needed for
PC relative relocs.
FIXME: This macro refers to symbols and asect; these are from the
calling function, not the macro arguments. */
#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr)
#define coff_relocate_section _bfd_coff_generic_relocate_section
static reloc_howto_type *
coff_i860_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
asection *sec,
struct internal_reloc *rel,
struct coff_link_hash_entry *h,
struct internal_syment *sym,
bfd_vma *addendp)
{
reloc_howto_type *howto;
if (rel->r_type > sizeof (howto_table) / sizeof (howto_table[0]))
{
bfd_set_error (bfd_error_bad_value);
return NULL;
}
howto = howto_table + rel->r_type;
if (howto->pc_relative)
*addendp += sec->vma;
if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
{
size (sym->n_value) as an addend. The relocate_section
function will be adding in the final value of the symbol. We
need to subtract out the current size in order to get the
correct result. */
BFD_ASSERT (h != NULL);
parameters get the wrong relocation address. If I link two versions
with and without this section bypassed and then do a binary comparison,
the addresses which are different can be looked up in the map. The
case in which this section has been bypassed has addresses which correspond
to values I can find in the map. */
*addendp -= sym->n_value;
}
relocatable link), we need to add in the final size of the
common symbol. */
if (h != NULL && h->root.type == bfd_link_hash_common)
*addendp += h->root.u.c.size;
return howto;
}
static reloc_howto_type *
coff_i860_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
switch (code)
{
case BFD_RELOC_32:
return howto_table + R_DIR32;
case BFD_RELOC_860_PC26:
return howto_table + COFF860_R_BRADDR;
case BFD_RELOC_860_PC16:
return howto_table + COFF860_R_SPLIT0;
case BFD_RELOC_860_LOW0:
return howto_table + COFF860_R_LOW0;
case BFD_RELOC_860_SPLIT0:
return howto_table + COFF860_R_SPLIT0;
case BFD_RELOC_860_LOW1:
return howto_table + COFF860_R_LOW1;
case BFD_RELOC_860_SPLIT1:
return howto_table + COFF860_R_SPLIT1;
case BFD_RELOC_860_LOW2:
return howto_table + COFF860_R_LOW2;
case BFD_RELOC_860_SPLIT2:
return howto_table + COFF860_R_SPLIT2;
case BFD_RELOC_860_LOW3:
return howto_table + COFF860_R_LOW3;
case BFD_RELOC_860_HIGHADJ:
return howto_table + COFF860_R_HIGHADJ;
case BFD_RELOC_860_HIGH:
return howto_table + COFF860_R_HIGH;
default:
BFD_FAIL ();
return 0;
}
}
entry. This special handling is due to the `PAIR' relocation
which has a different meaning for the `r_symndx' field. */
static void
i860_reloc_processing (arelent *cache_ptr, struct internal_reloc *dst,
asymbol **symbols, bfd *abfd, asection *asect)
{
if (dst->r_type == COFF860_R_PAIR)
{
cache_ptr->howto = howto_table + dst->r_type;
cache_ptr->address = dst->r_vaddr;
cache_ptr->addend = dst->r_symndx;
cache_ptr->sym_ptr_ptr= bfd_abs_section_ptr->symbol_ptr_ptr;
}
else
{
would do (which this code is taken directly from). */
asymbol *ptr = NULL;
cache_ptr->address = dst->r_vaddr;
if (dst->r_symndx != -1)
{
if (dst->r_symndx < 0 || dst->r_symndx >= obj_conv_table_size (abfd))
{
(*_bfd_error_handler)
(_("%B: warning: illegal symbol index %ld in relocs"),
abfd, dst->r_symndx);
cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
ptr = NULL;
}
else
{
cache_ptr->sym_ptr_ptr = (symbols
+ obj_convert (abfd)[dst->r_symndx]);
ptr = *(cache_ptr->sym_ptr_ptr);
}
}
else
{
cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
ptr = NULL;
}
relocated as if their sections started at 0. But the offsets
refering to the symbols in the raw data have not been
modified, so we have to have a negative addend to compensate.
Note that symbols which used to be common must be left alone. */
CALC_ADDEND (abfd, ptr, (*dst), cache_ptr);
cache_ptr->address -= asect->vma;
RTYPE2HOWTO (cache_ptr, dst);
}
}
#define coff_rtype_to_howto coff_i860_rtype_to_howto
#define coff_bfd_reloc_type_lookup coff_i860_reloc_type_lookup
#define RELOC_PROCESSING(relent, reloc, symbols, abfd, section) \
i860_reloc_processing (relent, reloc, symbols, abfd, section)
#include "coffcode.h"
static const bfd_target *
i3coff_object_p(bfd *a)
{
return coff_object_p (a);
}
const bfd_target
#ifdef TARGET_SYM
TARGET_SYM =
#else
i860coff_vec =
#endif
{
#ifdef TARGET_NAME
TARGET_NAME,
#else
"coff-i860",
#endif
bfd_target_coff_flavour,
BFD_ENDIAN_LITTLE,
BFD_ENDIAN_LITTLE,
(HAS_RELOC | EXEC_P |
HAS_LINENO | HAS_DEBUG |
HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC),
'_',
'/',
15,
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
bfd_getl16, bfd_getl_signed_16, bfd_putl16,
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
bfd_getl16, bfd_getl_signed_16, bfd_putl16,
{_bfd_dummy_target, i3coff_object_p,
bfd_generic_archive_p, i3coff_object_p},
{bfd_false, coff_mkobject, _bfd_generic_mkarchive,
bfd_false},
{bfd_false, coff_write_object_contents,
_bfd_write_archive_contents, bfd_false},
BFD_JUMP_TABLE_GENERIC (coff),
BFD_JUMP_TABLE_COPY (coff),
BFD_JUMP_TABLE_CORE (_bfd_nocore),
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
BFD_JUMP_TABLE_SYMBOLS (coff),
BFD_JUMP_TABLE_RELOCS (coff),
BFD_JUMP_TABLE_WRITE (coff),
BFD_JUMP_TABLE_LINK (coff),
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
NULL,
COFF_SWAP_TABLE
};
