Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
2000, 2001, 2002, 2003, 2004
Free Software Foundation, Inc.
Original version by Per Bothner.
Full support added by Ian Lance Taylor, ian@cygnus.com.
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 "bfdlink.h"
#include "libbfd.h"
#include "coff/internal.h"
#include "coff/sym.h"
#include "coff/symconst.h"
#include "coff/ecoff.h"
#include "coff/mips.h"
#include "libcoff.h"
#include "libecoff.h"
static bfd_boolean mips_ecoff_bad_format_hook
PARAMS ((bfd *abfd, PTR filehdr));
static void mips_ecoff_swap_reloc_in
PARAMS ((bfd *, PTR, struct internal_reloc *));
static void mips_ecoff_swap_reloc_out
PARAMS ((bfd *, const struct internal_reloc *, PTR));
static void mips_adjust_reloc_in
PARAMS ((bfd *, const struct internal_reloc *, arelent *));
static void mips_adjust_reloc_out
PARAMS ((bfd *, const arelent *, struct internal_reloc *));
static bfd_reloc_status_type mips_generic_reloc
PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data,
asection *section, bfd *output_bfd, char **error));
static bfd_reloc_status_type mips_refhi_reloc
PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data,
asection *section, bfd *output_bfd, char **error));
static bfd_reloc_status_type mips_reflo_reloc
PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data,
asection *section, bfd *output_bfd, char **error));
static bfd_reloc_status_type mips_gprel_reloc
PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data,
asection *section, bfd *output_bfd, char **error));
static void mips_relocate_hi
PARAMS ((struct internal_reloc *refhi, struct internal_reloc *reflo,
bfd *input_bfd, asection *input_section, bfd_byte *contents,
bfd_vma relocation));
static bfd_boolean mips_relocate_section
PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, PTR));
static reloc_howto_type *mips_bfd_reloc_type_lookup
PARAMS ((bfd *, bfd_reloc_code_real_type));
a completely different format. ECOFF targets use some of the
swapping routines from coffswap.h, and some of the generic COFF
routines in coffgen.c, but, unlike the real COFF targets, do not
use coffcode.h itself.
Get the generic COFF swapping routines, except for the reloc,
symbol, and lineno ones. Give them ECOFF names. */
#define MIPSECOFF
#define NO_COFF_RELOCS
#define NO_COFF_SYMBOLS
#define NO_COFF_LINENOS
#define coff_swap_filehdr_in mips_ecoff_swap_filehdr_in
#define coff_swap_filehdr_out mips_ecoff_swap_filehdr_out
#define coff_swap_aouthdr_in mips_ecoff_swap_aouthdr_in
#define coff_swap_aouthdr_out mips_ecoff_swap_aouthdr_out
#define coff_swap_scnhdr_in mips_ecoff_swap_scnhdr_in
#define coff_swap_scnhdr_out mips_ecoff_swap_scnhdr_out
#include "coffswap.h"
#define ECOFF_32
#include "ecoffswap.h"
static reloc_howto_type mips_howto_table[] =
{
this is a reference to the .abs section, which will cause
bfd_perform_relocation to do nothing. */
HOWTO (MIPS_R_IGNORE,
0,
0,
8,
FALSE,
0,
complain_overflow_dont,
0,
"IGNORE",
FALSE,
0,
0,
FALSE),
HOWTO (MIPS_R_REFHALF,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
mips_generic_reloc,
"REFHALF",
TRUE,
0xffff,
0xffff,
FALSE),
HOWTO (MIPS_R_REFWORD,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
mips_generic_reloc,
"REFWORD",
TRUE,
0xffffffff,
0xffffffff,
FALSE),
HOWTO (MIPS_R_JMPADDR,
2,
2,
26,
FALSE,
0,
complain_overflow_dont,
detection, because the upper four
bits must match the PC. */
mips_generic_reloc,
"JMPADDR",
TRUE,
0x3ffffff,
0x3ffffff,
FALSE),
mips_refhi_reloc. */
HOWTO (MIPS_R_REFHI,
16,
2,
16,
FALSE,
0,
complain_overflow_bitfield,
mips_refhi_reloc,
"REFHI",
TRUE,
0xffff,
0xffff,
FALSE),
HOWTO (MIPS_R_REFLO,
0,
2,
16,
FALSE,
0,
complain_overflow_dont,
mips_reflo_reloc,
"REFLO",
TRUE,
0xffff,
0xffff,
FALSE),
function mips_gprel_reloc. */
HOWTO (MIPS_R_GPREL,
0,
2,
16,
FALSE,
0,
complain_overflow_signed,
mips_gprel_reloc,
"GPREL",
TRUE,
0xffff,
0xffff,
FALSE),
Handled by the function mips_gprel_reloc. */
HOWTO (MIPS_R_LITERAL,
0,
2,
16,
FALSE,
0,
complain_overflow_signed,
mips_gprel_reloc,
"LITERAL",
TRUE,
0xffff,
0xffff,
FALSE),
EMPTY_HOWTO (8),
EMPTY_HOWTO (9),
EMPTY_HOWTO (10),
EMPTY_HOWTO (11),
when assembling. It should never appear in output files, and
be removed. (It used to be used for embedded-PIC support.) */
HOWTO (MIPS_R_PCREL16,
2,
2,
16,
TRUE,
0,
complain_overflow_signed,
mips_generic_reloc,
"PCREL16",
TRUE,
0xffff,
0xffff,
TRUE),
};
#define MIPS_HOWTO_COUNT \
(sizeof mips_howto_table / sizeof mips_howto_table[0])
static bfd_boolean
mips_ecoff_bad_format_hook (abfd, filehdr)
bfd *abfd;
PTR filehdr;
{
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
switch (internal_f->f_magic)
{
case MIPS_MAGIC_1:
return TRUE;
case MIPS_MAGIC_BIG:
case MIPS_MAGIC_BIG2:
case MIPS_MAGIC_BIG3:
return bfd_big_endian (abfd);
case MIPS_MAGIC_LITTLE:
case MIPS_MAGIC_LITTLE2:
case MIPS_MAGIC_LITTLE3:
return bfd_little_endian (abfd);
default:
return FALSE;
}
}
external form. They use a bit which indicates whether the symbol
is external. */
static void
mips_ecoff_swap_reloc_in (abfd, ext_ptr, intern)
bfd *abfd;
PTR ext_ptr;
struct internal_reloc *intern;
{
const RELOC *ext = (RELOC *) ext_ptr;
intern->r_vaddr = H_GET_32 (abfd, ext->r_vaddr);
if (bfd_header_big_endian (abfd))
{
intern->r_symndx = (((int) ext->r_bits[0]
<< RELOC_BITS0_SYMNDX_SH_LEFT_BIG)
| ((int) ext->r_bits[1]
<< RELOC_BITS1_SYMNDX_SH_LEFT_BIG)
| ((int) ext->r_bits[2]
<< RELOC_BITS2_SYMNDX_SH_LEFT_BIG));
intern->r_type = ((ext->r_bits[3] & RELOC_BITS3_TYPE_BIG)
>> RELOC_BITS3_TYPE_SH_BIG);
intern->r_extern = (ext->r_bits[3] & RELOC_BITS3_EXTERN_BIG) != 0;
}
else
{
intern->r_symndx = (((int) ext->r_bits[0]
<< RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE)
| ((int) ext->r_bits[1]
<< RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE)
| ((int) ext->r_bits[2]
<< RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE));
intern->r_type = (((ext->r_bits[3] & RELOC_BITS3_TYPE_LITTLE)
>> RELOC_BITS3_TYPE_SH_LITTLE)
| ((ext->r_bits[3] & RELOC_BITS3_TYPEHI_LITTLE)
<< RELOC_BITS3_TYPEHI_SH_LITTLE));
intern->r_extern = (ext->r_bits[3] & RELOC_BITS3_EXTERN_LITTLE) != 0;
}
}
static void
mips_ecoff_swap_reloc_out (abfd, intern, dst)
bfd *abfd;
const struct internal_reloc *intern;
PTR dst;
{
RELOC *ext = (RELOC *) dst;
long r_symndx;
BFD_ASSERT (intern->r_extern
|| (intern->r_symndx >= 0 && intern->r_symndx <= 12));
r_symndx = intern->r_symndx;
H_PUT_32 (abfd, intern->r_vaddr, ext->r_vaddr);
if (bfd_header_big_endian (abfd))
{
ext->r_bits[0] = r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_BIG;
ext->r_bits[1] = r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_BIG;
ext->r_bits[2] = r_symndx >> RELOC_BITS2_SYMNDX_SH_LEFT_BIG;
ext->r_bits[3] = (((intern->r_type << RELOC_BITS3_TYPE_SH_BIG)
& RELOC_BITS3_TYPE_BIG)
| (intern->r_extern ? RELOC_BITS3_EXTERN_BIG : 0));
}
else
{
ext->r_bits[0] = r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE;
ext->r_bits[1] = r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE;
ext->r_bits[2] = r_symndx >> RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE;
ext->r_bits[3] = (((intern->r_type << RELOC_BITS3_TYPE_SH_LITTLE)
& RELOC_BITS3_TYPE_LITTLE)
| ((intern->r_type >> RELOC_BITS3_TYPEHI_SH_LITTLE
& RELOC_BITS3_TYPEHI_LITTLE))
| (intern->r_extern ? RELOC_BITS3_EXTERN_LITTLE : 0));
}
}
ECOFF targets, and that part is in ecoff.c. The rest is done in
this backend routine. It must fill in the howto field. */
static void
mips_adjust_reloc_in (abfd, intern, rptr)
bfd *abfd;
const struct internal_reloc *intern;
arelent *rptr;
{
if (intern->r_type > MIPS_R_PCREL16)
abort ();
if (! intern->r_extern
&& (intern->r_type == MIPS_R_GPREL
|| intern->r_type == MIPS_R_LITERAL))
rptr->addend += ecoff_data (abfd)->gp;
the absolute section so that the reloc is ignored. */
if (intern->r_type == MIPS_R_IGNORE)
rptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
rptr->howto = &mips_howto_table[intern->r_type];
}
are needed for MIPS. */
static void
mips_adjust_reloc_out (abfd, rel, intern)
bfd *abfd ATTRIBUTE_UNUSED;
const arelent *rel ATTRIBUTE_UNUSED;
struct internal_reloc *intern ATTRIBUTE_UNUSED;
{
}
sections. If we are producing relocatable output, and the reloc
is against an external symbol, and nothing has given us any
additional addend, the resulting reloc will also be against the
same symbol. In such a case, we don't want to change anything
about the way the reloc is handled, since it will all be done at
final link time. Rather than put special case code into
bfd_perform_relocation, all the reloc types use this howto
function. It just short circuits the reloc if producing
relocatable output against an external symbol. */
static bfd_reloc_status_type
mips_generic_reloc (abfd,
reloc_entry,
symbol,
data,
input_section,
output_bfd,
error_message)
bfd *abfd ATTRIBUTE_UNUSED;
arelent *reloc_entry;
asymbol *symbol;
PTR data ATTRIBUTE_UNUSED;
asection *input_section;
bfd *output_bfd;
char **error_message ATTRIBUTE_UNUSED;
{
if (output_bfd != (bfd *) NULL
&& (symbol->flags & BSF_SECTION_SYM) == 0
&& reloc_entry->addend == 0)
{
reloc_entry->address += input_section->output_offset;
return bfd_reloc_ok;
}
return bfd_reloc_continue;
}
REFLO reloc, because there is a carry from the REFLO to the REFHI.
Here we just save the information we need; we do the actual
relocation when we see the REFLO. MIPS ECOFF requires that the
REFLO immediately follow the REFHI. As a GNU extension, we permit
an arbitrary number of HI relocs to be associated with a single LO
reloc. This extension permits gcc to output the HI and LO relocs
itself. */
struct mips_hi
{
struct mips_hi *next;
bfd_byte *addr;
bfd_vma addend;
};
static struct mips_hi *mips_refhi_list;
static bfd_reloc_status_type
mips_refhi_reloc (abfd,
reloc_entry,
symbol,
data,
input_section,
output_bfd,
error_message)
bfd *abfd ATTRIBUTE_UNUSED;
arelent *reloc_entry;
asymbol *symbol;
PTR data;
asection *input_section;
bfd *output_bfd;
char **error_message ATTRIBUTE_UNUSED;
{
bfd_reloc_status_type ret;
bfd_vma relocation;
struct mips_hi *n;
to change anything. */
if (output_bfd != (bfd *) NULL
&& (symbol->flags & BSF_SECTION_SYM) == 0
&& reloc_entry->addend == 0)
{
reloc_entry->address += input_section->output_offset;
return bfd_reloc_ok;
}
ret = bfd_reloc_ok;
if (bfd_is_und_section (symbol->section)
&& output_bfd == (bfd *) NULL)
ret = bfd_reloc_undefined;
if (bfd_is_com_section (symbol->section))
relocation = 0;
else
relocation = symbol->value;
relocation += symbol->section->output_section->vma;
relocation += symbol->section->output_offset;
relocation += reloc_entry->addend;
if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
return bfd_reloc_outofrange;
n = (struct mips_hi *) bfd_malloc ((bfd_size_type) sizeof *n);
if (n == NULL)
return bfd_reloc_outofrange;
n->addr = (bfd_byte *) data + reloc_entry->address;
n->addend = relocation;
n->next = mips_refhi_list;
mips_refhi_list = n;
if (output_bfd != (bfd *) NULL)
reloc_entry->address += input_section->output_offset;
return ret;
}
relocation; this function exists in order to do the REFHI
relocation described above. */
static bfd_reloc_status_type
mips_reflo_reloc (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;
{
if (mips_refhi_list != NULL)
{
struct mips_hi *l;
l = mips_refhi_list;
while (l != NULL)
{
unsigned long insn;
unsigned long val;
unsigned long vallo;
struct mips_hi *next;
need to know anything about the REFLO itself, except
where to find the low 16 bits of the addend needed by the
REFHI. */
insn = bfd_get_32 (abfd, l->addr);
vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address)
& 0xffff);
val = ((insn & 0xffff) << 16) + vallo;
val += l->addend;
value. Therefore, a negative value in the low order bits
requires an adjustment in the high order bits. We need
to make this adjustment in two ways: once for the bits we
took from the data, and once for the bits we are putting
back in to the data. */
if ((vallo & 0x8000) != 0)
val -= 0x10000;
if ((val & 0x8000) != 0)
val += 0x10000;
insn = (insn &~ (unsigned) 0xffff) | ((val >> 16) & 0xffff);
bfd_put_32 (abfd, (bfd_vma) insn, l->addr);
next = l->next;
free (l);
l = next;
}
mips_refhi_list = NULL;
}
return mips_generic_reloc (abfd, reloc_entry, symbol, data,
input_section, output_bfd, error_message);
}
the offset from the gp register. */
static bfd_reloc_status_type
mips_gprel_reloc (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;
{
bfd_boolean relocatable;
bfd_vma gp;
bfd_vma relocation;
unsigned long val;
unsigned long insn;
addend, we don't want to change anything. We will only have an
addend if this is a newly created reloc, not read from an ECOFF
file. */
if (output_bfd != (bfd *) NULL
&& (symbol->flags & BSF_SECTION_SYM) == 0
&& reloc_entry->addend == 0)
{
reloc_entry->address += input_section->output_offset;
return bfd_reloc_ok;
}
if (output_bfd != (bfd *) NULL)
relocatable = TRUE;
else
{
relocatable = FALSE;
output_bfd = symbol->section->output_section->owner;
}
if (bfd_is_und_section (symbol->section) && ! relocatable)
return bfd_reloc_undefined;
symbol value correctly. We look up the symbol _gp in the output
BFD. If we can't find it, we're stuck. We cache it in the ECOFF
target data. We don't need to adjust the symbol value for an
external symbol if we are producing relocatable output. */
gp = _bfd_get_gp_value (output_bfd);
if (gp == 0
&& (! relocatable
|| (symbol->flags & BSF_SECTION_SYM) != 0))
{
if (relocatable)
{
gp = symbol->section->output_section->vma + 0x4000;
_bfd_set_gp_value (output_bfd, gp);
}
else
{
unsigned int count;
asymbol **sym;
unsigned int i;
count = bfd_get_symcount (output_bfd);
sym = bfd_get_outsymbols (output_bfd);
if (sym == (asymbol **) NULL)
i = count;
else
{
for (i = 0; i < count; i++, sym++)
{
register const char *name;
name = bfd_asymbol_name (*sym);
if (*name == '_' && strcmp (name, "_gp") == 0)
{
gp = bfd_asymbol_value (*sym);
_bfd_set_gp_value (output_bfd, gp);
break;
}
}
}
if (i >= count)
{
gp = 4;
_bfd_set_gp_value (output_bfd, gp);
*error_message =
(char *) _("GP relative relocation when _gp not defined");
return bfd_reloc_dangerous;
}
}
}
if (bfd_is_com_section (symbol->section))
relocation = 0;
else
relocation = symbol->value;
relocation += symbol->section->output_section->vma;
relocation += symbol->section->output_offset;
if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
return bfd_reloc_outofrange;
insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff;
if (val & 0x8000)
val -= 0x10000;
are producing relocatable output, we don't want to do this for
an external symbol. */
if (! relocatable
|| (symbol->flags & BSF_SECTION_SYM) != 0)
val += relocation - gp;
insn = (insn &~ (unsigned) 0xffff) | (val & 0xffff);
bfd_put_32 (abfd, (bfd_vma) insn, (bfd_byte *) data + reloc_entry->address);
if (relocatable)
reloc_entry->address += input_section->output_offset;
if ((long) val >= 0x8000 || (long) val < -0x8000)
return bfd_reloc_overflow;
return bfd_reloc_ok;
}
static reloc_howto_type *
mips_bfd_reloc_type_lookup (abfd, code)
bfd *abfd ATTRIBUTE_UNUSED;
bfd_reloc_code_real_type code;
{
int mips_type;
switch (code)
{
case BFD_RELOC_16:
mips_type = MIPS_R_REFHALF;
break;
case BFD_RELOC_32:
case BFD_RELOC_CTOR:
mips_type = MIPS_R_REFWORD;
break;
case BFD_RELOC_MIPS_JMP:
mips_type = MIPS_R_JMPADDR;
break;
case BFD_RELOC_HI16_S:
mips_type = MIPS_R_REFHI;
break;
case BFD_RELOC_LO16:
mips_type = MIPS_R_REFLO;
break;
case BFD_RELOC_GPREL16:
mips_type = MIPS_R_GPREL;
break;
case BFD_RELOC_MIPS_LITERAL:
mips_type = MIPS_R_LITERAL;
break;
case BFD_RELOC_16_PCREL_S2:
mips_type = MIPS_R_PCREL16;
break;
default:
return (reloc_howto_type *) NULL;
}
return &mips_howto_table[mips_type];
}
relocations. The REFHI relocation must be followed by a REFLO
relocation, and the addend used is formed from the addends of both
instructions. */
static void
mips_relocate_hi (refhi, reflo, input_bfd, input_section, contents,
relocation)
struct internal_reloc *refhi;
struct internal_reloc *reflo;
bfd *input_bfd;
asection *input_section;
bfd_byte *contents;
bfd_vma relocation;
{
unsigned long insn;
unsigned long val;
unsigned long vallo;
if (refhi == NULL)
return;
insn = bfd_get_32 (input_bfd,
contents + refhi->r_vaddr - input_section->vma);
if (reflo == NULL)
vallo = 0;
else
vallo = (bfd_get_32 (input_bfd,
contents + reflo->r_vaddr - input_section->vma)
& 0xffff);
val = ((insn & 0xffff) << 16) + vallo;
val += relocation;
Therefore, a negative value in the low order bits requires an
adjustment in the high order bits. We need to make this
adjustment in two ways: once for the bits we took from the data,
and once for the bits we are putting back in to the data. */
if ((vallo & 0x8000) != 0)
val -= 0x10000;
if ((val & 0x8000) != 0)
val += 0x10000;
insn = (insn &~ (unsigned) 0xffff) | ((val >> 16) & 0xffff);
bfd_put_32 (input_bfd, (bfd_vma) insn,
contents + refhi->r_vaddr - input_section->vma);
}
static bfd_boolean
mips_relocate_section (output_bfd, info, input_bfd, input_section,
contents, external_relocs)
bfd *output_bfd;
struct bfd_link_info *info;
bfd *input_bfd;
asection *input_section;
bfd_byte *contents;
PTR external_relocs;
{
asection **symndx_to_section;
struct ecoff_link_hash_entry **sym_hashes;
bfd_vma gp;
bfd_boolean gp_undefined;
struct external_reloc *ext_rel;
struct external_reloc *ext_rel_end;
unsigned int i;
bfd_boolean got_lo;
struct internal_reloc lo_int_rel;
bfd_size_type amt;
BFD_ASSERT (input_bfd->xvec->byteorder
== output_bfd->xvec->byteorder);
the appropriate section. This is faster than looking up the
section by name each time. */
symndx_to_section = ecoff_data (input_bfd)->symndx_to_section;
if (symndx_to_section == (asection **) NULL)
{
amt = NUM_RELOC_SECTIONS * sizeof (asection *);
symndx_to_section = (asection **) bfd_alloc (input_bfd, amt);
if (!symndx_to_section)
return FALSE;
symndx_to_section[RELOC_SECTION_NONE] = NULL;
symndx_to_section[RELOC_SECTION_TEXT] =
bfd_get_section_by_name (input_bfd, ".text");
symndx_to_section[RELOC_SECTION_RDATA] =
bfd_get_section_by_name (input_bfd, ".rdata");
symndx_to_section[RELOC_SECTION_DATA] =
bfd_get_section_by_name (input_bfd, ".data");
symndx_to_section[RELOC_SECTION_SDATA] =
bfd_get_section_by_name (input_bfd, ".sdata");
symndx_to_section[RELOC_SECTION_SBSS] =
bfd_get_section_by_name (input_bfd, ".sbss");
symndx_to_section[RELOC_SECTION_BSS] =
bfd_get_section_by_name (input_bfd, ".bss");
symndx_to_section[RELOC_SECTION_INIT] =
bfd_get_section_by_name (input_bfd, ".init");
symndx_to_section[RELOC_SECTION_LIT8] =
bfd_get_section_by_name (input_bfd, ".lit8");
symndx_to_section[RELOC_SECTION_LIT4] =
bfd_get_section_by_name (input_bfd, ".lit4");
symndx_to_section[RELOC_SECTION_XDATA] = NULL;
symndx_to_section[RELOC_SECTION_PDATA] = NULL;
symndx_to_section[RELOC_SECTION_FINI] =
bfd_get_section_by_name (input_bfd, ".fini");
symndx_to_section[RELOC_SECTION_LITA] = NULL;
symndx_to_section[RELOC_SECTION_ABS] = NULL;
ecoff_data (input_bfd)->symndx_to_section = symndx_to_section;
}
sym_hashes = ecoff_data (input_bfd)->sym_hashes;
gp = _bfd_get_gp_value (output_bfd);
if (gp == 0)
gp_undefined = TRUE;
else
gp_undefined = FALSE;
got_lo = FALSE;
ext_rel = (struct external_reloc *) external_relocs;
ext_rel_end = ext_rel + input_section->reloc_count;
for (i = 0; ext_rel < ext_rel_end; ext_rel++, i++)
{
struct internal_reloc int_rel;
bfd_boolean use_lo = FALSE;
bfd_vma addend;
reloc_howto_type *howto;
struct ecoff_link_hash_entry *h = NULL;
asection *s = NULL;
bfd_vma relocation;
bfd_reloc_status_type r;
if (! got_lo)
mips_ecoff_swap_reloc_in (input_bfd, (PTR) ext_rel, &int_rel);
else
{
int_rel = lo_int_rel;
got_lo = FALSE;
}
BFD_ASSERT (int_rel.r_type
< sizeof mips_howto_table / sizeof mips_howto_table[0]);
by a REFLO reloc, and the addend is formed from both relocs. */
if (int_rel.r_type == MIPS_R_REFHI)
{
struct external_reloc *lo_ext_rel;
relocs before the REFLO reloc. This permits gcc to emit
the HI and LO relocs itself. */
for (lo_ext_rel = ext_rel + 1;
lo_ext_rel < ext_rel_end;
lo_ext_rel++)
{
mips_ecoff_swap_reloc_in (input_bfd, (PTR) lo_ext_rel,
&lo_int_rel);
if (lo_int_rel.r_type != int_rel.r_type)
break;
}
if (lo_ext_rel < ext_rel_end
&& lo_int_rel.r_type == MIPS_R_REFLO
&& int_rel.r_extern == lo_int_rel.r_extern
&& int_rel.r_symndx == lo_int_rel.r_symndx)
{
use_lo = TRUE;
if (lo_ext_rel == ext_rel + 1)
got_lo = TRUE;
}
}
howto = &mips_howto_table[int_rel.r_type];
if (int_rel.r_extern)
{
h = sym_hashes[int_rel.r_symndx];
external symbol which we thought was just a debugging
symbol. This should not happen. */
if (h == (struct ecoff_link_hash_entry *) NULL)
abort ();
}
else
{
if (int_rel.r_symndx < 0 || int_rel.r_symndx >= NUM_RELOC_SECTIONS)
s = NULL;
else
s = symndx_to_section[int_rel.r_symndx];
if (s == (asection *) NULL)
abort ();
}
values. */
if (int_rel.r_type != MIPS_R_GPREL
&& int_rel.r_type != MIPS_R_LITERAL)
addend = 0;
else
{
if (gp_undefined)
{
if (! ((*info->callbacks->reloc_dangerous)
(info, _("GP relative relocation used when GP not defined"),
input_bfd, input_section,
int_rel.r_vaddr - input_section->vma)))
return FALSE;
gp = 4;
_bfd_set_gp_value (output_bfd, gp);
gp_undefined = FALSE;
}
if (! int_rel.r_extern)
{
addend in the instruction is the difference between
INPUT_SECTION->vma and the GP value of INPUT_BFD. We
must change this to be the difference between the
final definition (which will end up in RELOCATION)
and the GP value of OUTPUT_BFD (which is in GP). */
addend = ecoff_data (input_bfd)->gp - gp;
}
else if (! info->relocatable
|| h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
current addend in the instruction is simply the
desired offset into the symbol (normally zero). We
are going to change this into a relocation against a
defined symbol, so we want the instruction to hold
the difference between the final definition of the
symbol (which will end up in RELOCATION) and the GP
value of OUTPUT_BFD (which is in GP). */
addend = - gp;
}
else
{
symbol. The current addend in the instruction is
simply the desired offset into the symbol (normally
zero). We are generating relocatable output, and we
aren't going to define this symbol, so we just leave
the instruction alone. */
addend = 0;
}
}
if (info->relocatable)
{
the existing reloc. */
if (int_rel.r_extern)
{
if ((h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
&& ! bfd_is_abs_section (h->root.u.def.section))
{
const char *name;
the reloc from being against the symbol to being
against the section. */
int_rel.r_extern = 0;
s = h->root.u.def.section;
name = bfd_get_section_name (output_bfd,
s->output_section);
int_rel.r_symndx = -1;
switch (name[1])
{
case 'b':
if (strcmp (name, ".bss") == 0)
int_rel.r_symndx = RELOC_SECTION_BSS;
break;
case 'd':
if (strcmp (name, ".data") == 0)
int_rel.r_symndx = RELOC_SECTION_DATA;
break;
case 'f':
if (strcmp (name, ".fini") == 0)
int_rel.r_symndx = RELOC_SECTION_FINI;
break;
case 'i':
if (strcmp (name, ".init") == 0)
int_rel.r_symndx = RELOC_SECTION_INIT;
break;
case 'l':
if (strcmp (name, ".lit8") == 0)
int_rel.r_symndx = RELOC_SECTION_LIT8;
else if (strcmp (name, ".lit4") == 0)
int_rel.r_symndx = RELOC_SECTION_LIT4;
break;
case 'r':
if (strcmp (name, ".rdata") == 0)
int_rel.r_symndx = RELOC_SECTION_RDATA;
break;
case 's':
if (strcmp (name, ".sdata") == 0)
int_rel.r_symndx = RELOC_SECTION_SDATA;
else if (strcmp (name, ".sbss") == 0)
int_rel.r_symndx = RELOC_SECTION_SBSS;
break;
case 't':
if (strcmp (name, ".text") == 0)
int_rel.r_symndx = RELOC_SECTION_TEXT;
break;
}
if (int_rel.r_symndx == -1)
abort ();
relocation = (h->root.u.def.value
+ s->output_section->vma
+ s->output_offset);
currently holds just the addend. We must adjust
by the address to get the right value. */
if (howto->pc_relative)
relocation -= int_rel.r_vaddr - input_section->vma;
h = NULL;
}
else
{
output BFD. */
int_rel.r_symndx = h->indx;
if (int_rel.r_symndx == -1)
{
if (! ((*info->callbacks->unattached_reloc)
(info, h->root.root.string, input_bfd,
input_section,
int_rel.r_vaddr - input_section->vma)))
return FALSE;
int_rel.r_symndx = 0;
}
relocation = 0;
}
}
else
{
value by the amount the section moved. */
relocation = (s->output_section->vma
+ s->output_offset
- s->vma);
}
relocation += addend;
addend = 0;
to the original address in the section and including the
reference to the new address. */
if (howto->pc_relative)
relocation -= (input_section->output_section->vma
+ input_section->output_offset
- input_section->vma);
if (relocation == 0)
r = bfd_reloc_ok;
else
{
if (int_rel.r_type != MIPS_R_REFHI)
r = _bfd_relocate_contents (howto, input_bfd, relocation,
(contents
+ int_rel.r_vaddr
- input_section->vma));
else
{
mips_relocate_hi (&int_rel,
use_lo ? &lo_int_rel : NULL,
input_bfd, input_section, contents,
relocation);
r = bfd_reloc_ok;
}
}
int_rel.r_vaddr += (input_section->output_section->vma
+ input_section->output_offset
- input_section->vma);
mips_ecoff_swap_reloc_out (input_bfd, &int_rel, (PTR) ext_rel);
}
else
{
if (int_rel.r_extern)
{
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
asection *hsec;
hsec = h->root.u.def.section;
relocation = (h->root.u.def.value
+ hsec->output_section->vma
+ hsec->output_offset);
}
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section,
int_rel.r_vaddr - input_section->vma, TRUE)))
return FALSE;
relocation = 0;
}
}
else
{
relocation = (s->output_section->vma
+ s->output_offset
- s->vma);
file. Make it look like a pcrel_offset relocation by
adding in the start address. */
if (howto->pc_relative)
relocation += int_rel.r_vaddr;
}
if (int_rel.r_type != MIPS_R_REFHI)
r = _bfd_final_link_relocate (howto,
input_bfd,
input_section,
contents,
(int_rel.r_vaddr
- input_section->vma),
relocation,
addend);
else
{
mips_relocate_hi (&int_rel,
use_lo ? &lo_int_rel : NULL,
input_bfd, input_section, contents,
relocation);
r = bfd_reloc_ok;
}
}
instruction provides a 28 bit address (the two lower bits are
implicit zeroes) which is combined with the upper four bits
of the instruction address. */
if (r == bfd_reloc_ok
&& int_rel.r_type == MIPS_R_JMPADDR
&& (((relocation
+ addend
+ (int_rel.r_extern ? 0 : s->vma))
& 0xf0000000)
!= ((input_section->output_section->vma
+ input_section->output_offset
+ (int_rel.r_vaddr - input_section->vma))
& 0xf0000000)))
r = bfd_reloc_overflow;
if (r != bfd_reloc_ok)
{
switch (r)
{
default:
case bfd_reloc_outofrange:
abort ();
case bfd_reloc_overflow:
{
const char *name;
if (int_rel.r_extern)
name = NULL;
else
name = bfd_section_name (input_bfd, s);
if (! ((*info->callbacks->reloc_overflow)
(info, (h ? &h->root : NULL), name, howto->name,
(bfd_vma) 0, input_bfd, input_section,
int_rel.r_vaddr - input_section->vma)))
return FALSE;
}
break;
}
}
}
return TRUE;
}
target vector points to this. */
static const struct ecoff_backend_data mips_ecoff_backend_data =
{
{
(void (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR))) bfd_void,
(void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void,
(void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void,
(unsigned (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR)))bfd_void,
(unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void,
(unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void,
(unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void,
mips_ecoff_swap_filehdr_out, mips_ecoff_swap_aouthdr_out,
mips_ecoff_swap_scnhdr_out,
FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, 0, FILNMLEN, TRUE, FALSE, 4, FALSE, 2,
mips_ecoff_swap_filehdr_in, mips_ecoff_swap_aouthdr_in,
mips_ecoff_swap_scnhdr_in, NULL,
mips_ecoff_bad_format_hook, _bfd_ecoff_set_arch_mach_hook,
_bfd_ecoff_mkobject_hook, _bfd_ecoff_styp_to_sec_flags,
_bfd_ecoff_set_alignment_hook, _bfd_ecoff_slurp_symbol_table,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL
},
bfd_arch_mips,
"__________",
executable file. E.g., 0x1000. */
0x1000,
Alpha. FALSE if .rdata is part of the data segment, as on the
MIPS. */
FALSE,
32,
&mips_howto_table[MIPS_R_REFWORD],
{
magicSym,
4,
sizeof (struct hdr_ext),
sizeof (struct dnr_ext),
sizeof (struct pdr_ext),
sizeof (struct sym_ext),
sizeof (struct opt_ext),
sizeof (struct fdr_ext),
sizeof (struct rfd_ext),
sizeof (struct ext_ext),
ecoff_swap_hdr_in,
ecoff_swap_dnr_in,
ecoff_swap_pdr_in,
ecoff_swap_sym_in,
ecoff_swap_opt_in,
ecoff_swap_fdr_in,
ecoff_swap_rfd_in,
ecoff_swap_ext_in,
_bfd_ecoff_swap_tir_in,
_bfd_ecoff_swap_rndx_in,
ecoff_swap_hdr_out,
ecoff_swap_dnr_out,
ecoff_swap_pdr_out,
ecoff_swap_sym_out,
ecoff_swap_opt_out,
ecoff_swap_fdr_out,
ecoff_swap_rfd_out,
ecoff_swap_ext_out,
_bfd_ecoff_swap_tir_out,
_bfd_ecoff_swap_rndx_out,
_bfd_ecoff_slurp_symbolic_info
},
RELSZ,
mips_ecoff_swap_reloc_in,
mips_ecoff_swap_reloc_out,
mips_adjust_reloc_in,
mips_adjust_reloc_out,
mips_relocate_section,
NULL,
_bfd_get_elt_at_filepos
};
#define _bfd_ecoff_bfd_reloc_type_lookup mips_bfd_reloc_type_lookup
#define _bfd_ecoff_bfd_get_relocated_section_contents \
bfd_generic_get_relocated_section_contents
#define _bfd_ecoff_get_section_contents_in_window \
_bfd_generic_get_section_contents_in_window
#define _bfd_ecoff_bfd_relax_section bfd_generic_relax_section
#define _bfd_ecoff_bfd_gc_sections bfd_generic_gc_sections
#define _bfd_ecoff_bfd_merge_sections bfd_generic_merge_sections
#define _bfd_ecoff_bfd_is_group_section bfd_generic_is_group_section
#define _bfd_ecoff_bfd_discard_group bfd_generic_discard_group
#define _bfd_ecoff_section_already_linked \
_bfd_generic_section_already_linked
extern const bfd_target ecoff_big_vec;
const bfd_target ecoff_little_vec =
{
"ecoff-littlemips",
bfd_target_ecoff_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 | SEC_CODE | SEC_DATA),
0,
' ',
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, coff_object_p,
_bfd_ecoff_archive_p, _bfd_dummy_target},
{bfd_false, _bfd_ecoff_mkobject,
_bfd_generic_mkarchive, bfd_false},
{bfd_false, _bfd_ecoff_write_object_contents,
_bfd_write_archive_contents, bfd_false},
BFD_JUMP_TABLE_GENERIC (_bfd_ecoff),
BFD_JUMP_TABLE_COPY (_bfd_ecoff),
BFD_JUMP_TABLE_CORE (_bfd_nocore),
BFD_JUMP_TABLE_ARCHIVE (_bfd_ecoff),
BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff),
BFD_JUMP_TABLE_RELOCS (_bfd_ecoff),
BFD_JUMP_TABLE_WRITE (_bfd_ecoff),
BFD_JUMP_TABLE_LINK (_bfd_ecoff),
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
& ecoff_big_vec,
(PTR) &mips_ecoff_backend_data
};
const bfd_target ecoff_big_vec =
{
"ecoff-bigmips",
bfd_target_ecoff_flavour,
BFD_ENDIAN_BIG,
BFD_ENDIAN_BIG,
(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 | SEC_CODE | SEC_DATA),
0,
' ',
15,
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
bfd_getb16, bfd_getb_signed_16, bfd_putb16,
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
bfd_getb16, bfd_getb_signed_16, bfd_putb16,
{_bfd_dummy_target, coff_object_p,
_bfd_ecoff_archive_p, _bfd_dummy_target},
{bfd_false, _bfd_ecoff_mkobject,
_bfd_generic_mkarchive, bfd_false},
{bfd_false, _bfd_ecoff_write_object_contents,
_bfd_write_archive_contents, bfd_false},
BFD_JUMP_TABLE_GENERIC (_bfd_ecoff),
BFD_JUMP_TABLE_COPY (_bfd_ecoff),
BFD_JUMP_TABLE_CORE (_bfd_nocore),
BFD_JUMP_TABLE_ARCHIVE (_bfd_ecoff),
BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff),
BFD_JUMP_TABLE_RELOCS (_bfd_ecoff),
BFD_JUMP_TABLE_WRITE (_bfd_ecoff),
BFD_JUMP_TABLE_LINK (_bfd_ecoff),
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
& ecoff_little_vec,
(PTR) &mips_ecoff_backend_data
};
const bfd_target ecoff_biglittle_vec =
{
"ecoff-biglittlemips",
bfd_target_ecoff_flavour,
BFD_ENDIAN_LITTLE,
BFD_ENDIAN_BIG,
(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 | SEC_CODE | SEC_DATA),
0,
' ',
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_getb64, bfd_getb_signed_64, bfd_putb64,
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
bfd_getb16, bfd_getb_signed_16, bfd_putb16,
{_bfd_dummy_target, coff_object_p,
_bfd_ecoff_archive_p, _bfd_dummy_target},
{bfd_false, _bfd_ecoff_mkobject,
_bfd_generic_mkarchive, bfd_false},
{bfd_false, _bfd_ecoff_write_object_contents,
_bfd_write_archive_contents, bfd_false},
BFD_JUMP_TABLE_GENERIC (_bfd_ecoff),
BFD_JUMP_TABLE_COPY (_bfd_ecoff),
BFD_JUMP_TABLE_CORE (_bfd_nocore),
BFD_JUMP_TABLE_ARCHIVE (_bfd_ecoff),
BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff),
BFD_JUMP_TABLE_RELOCS (_bfd_ecoff),
BFD_JUMP_TABLE_WRITE (_bfd_ecoff),
BFD_JUMP_TABLE_LINK (_bfd_ecoff),
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
NULL,
(PTR) &mips_ecoff_backend_data
};
