5fa2aaa241
various other related changes. * libecoff.h (ecoff_backend_data): Added rdata_in_text field. Renamed finish_reloc to adjust_reloc_in. Added adjust_reloc_out field. (ecoff_bfd_get_relocated_section_contents): Don't define. * ecoff.c (ecoff_sec_to_styp_flags, ecoff_styp_to_sec_flags): Handle .lita section. (ecoff_slurp_reloc_table): Handle RELOC_SECTION_FINI. finish_reloc backend field renamed to adjust_reloc_in. (ecoff_bfd_seclet_link): Adjust number of aux entries to debug_align boundary. (ecoff_compute_section_file_positions): If rdata_in_text put .rdata section in text segment, not data segment. Put .pdata section in text segment. (ecoff_write_object_contents): Likewise. Also, call adjust_reloc_out, and handle .lita, .xdata, .pdata, .fini and absolute sections when writing out relocs. * coffswap.h (coff_swap_aouthdr_out): For ALPHAECOFF, output 2 for bldrev field, as on Alpha OSF/1. Padding field is now 2 bytes. * coff-mips.c (mips_ecoff_swap_reloc_out): Added assertion. (mips_adjust_reloc_in): Renamed from mips_finish_reloc. (mips_adjust_reloc_out): New function (does nothing). (mips_ecoff_backend_data): Initialize new fields. (ecoff_bfd_get_relocation_section_contents): Define to be bfd_generic_get_relocated_section_contents. * reloc.c (bfd_perform_relocation): Added casts to avoid Alpha OSF/1 cc bug.
999 lines
29 KiB
C
999 lines
29 KiB
C
/* BFD back-end for MIPS Extended-Coff files.
|
||
Copyright 1990, 1991, 1992, 1993 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
||
#include "bfd.h"
|
||
#include "sysdep.h"
|
||
#include "libbfd.h"
|
||
#include "seclet.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"
|
||
|
||
/* Prototypes for static functions. */
|
||
|
||
static 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));
|
||
static bfd_reloc_status_type mips_refhi_reloc PARAMS ((bfd *abfd,
|
||
arelent *reloc,
|
||
asymbol *symbol,
|
||
PTR data,
|
||
asection *section,
|
||
bfd *output_bfd));
|
||
static bfd_reloc_status_type mips_reflo_reloc PARAMS ((bfd *abfd,
|
||
arelent *reloc,
|
||
asymbol *symbol,
|
||
PTR data,
|
||
asection *section,
|
||
bfd *output_bfd));
|
||
static bfd_reloc_status_type mips_gprel_reloc PARAMS ((bfd *abfd,
|
||
arelent *reloc,
|
||
asymbol *symbol,
|
||
PTR data,
|
||
asection *section,
|
||
bfd *output_bfd));
|
||
|
||
/* ECOFF has COFF sections, but the debugging information is stored in
|
||
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"
|
||
|
||
/* Get the ECOFF swapping routines. */
|
||
#define ECOFF_32
|
||
#include "ecoffswap.h"
|
||
|
||
/* How to process the various relocs types. */
|
||
|
||
static reloc_howto_type mips_howto_table[] =
|
||
{
|
||
/* Reloc type 0 is ignored. The reloc reading code ensures that
|
||
this is a reference to the .abs section, which will cause
|
||
bfd_perform_relocation to do nothing. */
|
||
HOWTO (MIPS_R_IGNORE, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
8, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
0, /* special_function */
|
||
"IGNORE", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A 16 bit reference to a symbol, normally from a data section. */
|
||
HOWTO (MIPS_R_REFHALF, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
mips_generic_reloc, /* special_function */
|
||
"REFHALF", /* name */
|
||
true, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A 32 bit reference to a symbol, normally from a data section. */
|
||
HOWTO (MIPS_R_REFWORD, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
mips_generic_reloc, /* special_function */
|
||
"REFWORD", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A 26 bit absolute jump address. */
|
||
HOWTO (MIPS_R_JMPADDR, /* type */
|
||
2, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
26, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
/* This needs complex overflow
|
||
detection, because the upper four
|
||
bits must match the PC. */
|
||
mips_generic_reloc, /* special_function */
|
||
"JMPADDR", /* name */
|
||
true, /* partial_inplace */
|
||
0x3ffffff, /* src_mask */
|
||
0x3ffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The high 16 bits of a symbol value. Handled by the function
|
||
mips_refhi_reloc. */
|
||
HOWTO (MIPS_R_REFHI, /* type */
|
||
16, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
mips_refhi_reloc, /* special_function */
|
||
"REFHI", /* name */
|
||
true, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The low 16 bits of a symbol value. */
|
||
HOWTO (MIPS_R_REFLO, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
mips_reflo_reloc, /* special_function */
|
||
"REFLO", /* name */
|
||
true, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A reference to an offset from the gp register. Handled by the
|
||
function mips_gprel_reloc. */
|
||
HOWTO (MIPS_R_GPREL, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
mips_gprel_reloc, /* special_function */
|
||
"GPREL", /* name */
|
||
true, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A reference to a literal using an offset from the gp register.
|
||
Handled by the function mips_gprel_reloc. */
|
||
HOWTO (MIPS_R_LITERAL, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
mips_gprel_reloc, /* special_function */
|
||
"LITERAL", /* name */
|
||
true, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false) /* pcrel_offset */
|
||
};
|
||
|
||
#define MIPS_HOWTO_COUNT \
|
||
(sizeof mips_howto_table / sizeof mips_howto_table[0])
|
||
|
||
/* See whether the magic number matches. */
|
||
|
||
static 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:
|
||
/* I don't know what endianness this implies. */
|
||
return true;
|
||
|
||
case MIPS_MAGIC_BIG:
|
||
case MIPS_MAGIC_BIG2:
|
||
case MIPS_MAGIC_BIG3:
|
||
return abfd->xvec->byteorder_big_p;
|
||
|
||
case MIPS_MAGIC_LITTLE:
|
||
case MIPS_MAGIC_LITTLE2:
|
||
case MIPS_MAGIC_LITTLE3:
|
||
return abfd->xvec->byteorder_big_p == false;
|
||
|
||
default:
|
||
return false;
|
||
}
|
||
}
|
||
|
||
/* Reloc handling. MIPS ECOFF relocs are packed into 8 bytes in
|
||
external form. They use a bit which indicates whether the symbol
|
||
is external. */
|
||
|
||
/* Swap a reloc in. */
|
||
|
||
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 = bfd_h_get_32 (abfd, (bfd_byte *) ext->r_vaddr);
|
||
if (abfd->xvec->header_byteorder_big_p != false)
|
||
{
|
||
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);
|
||
intern->r_extern = (ext->r_bits[3] & RELOC_BITS3_EXTERN_LITTLE) != 0;
|
||
}
|
||
}
|
||
|
||
/* Swap a reloc out. */
|
||
|
||
static void
|
||
mips_ecoff_swap_reloc_out (abfd, intern, dst)
|
||
bfd *abfd;
|
||
const struct internal_reloc *intern;
|
||
PTR dst;
|
||
{
|
||
RELOC *ext = (RELOC *) dst;
|
||
|
||
BFD_ASSERT (intern->r_extern
|
||
|| (intern->r_symndx >= 0 && intern->r_symndx <= 12));
|
||
|
||
bfd_h_put_32 (abfd, intern->r_vaddr, (bfd_byte *) ext->r_vaddr);
|
||
if (abfd->xvec->header_byteorder_big_p != false)
|
||
{
|
||
ext->r_bits[0] = intern->r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_BIG;
|
||
ext->r_bits[1] = intern->r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_BIG;
|
||
ext->r_bits[2] = intern->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] = intern->r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE;
|
||
ext->r_bits[1] = intern->r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE;
|
||
ext->r_bits[2] = intern->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_extern ? RELOC_BITS3_EXTERN_LITTLE : 0));
|
||
}
|
||
}
|
||
|
||
/* Finish canonicalizing a reloc. Part of this is generic to all
|
||
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_LITERAL)
|
||
abort ();
|
||
|
||
if (! intern->r_extern
|
||
&& (intern->r_type == MIPS_R_GPREL
|
||
|| intern->r_type == MIPS_R_LITERAL))
|
||
rptr->addend += ecoff_data (abfd)->gp;
|
||
|
||
/* If the type is MIPS_R_IGNORE, make sure this is a reference to
|
||
the absolute section so that the reloc is ignored. */
|
||
if (intern->r_type == MIPS_R_IGNORE)
|
||
rptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr;
|
||
|
||
rptr->howto = &mips_howto_table[intern->r_type];
|
||
}
|
||
|
||
/* Make any adjustments needed to a reloc before writing it out. None
|
||
are needed for MIPS. */
|
||
|
||
static void
|
||
mips_adjust_reloc_in (abfd, rel, intern)
|
||
bfd *abfd;
|
||
const arelent *rel;
|
||
struct internal_reloc *intern;
|
||
{
|
||
}
|
||
|
||
/* ECOFF relocs are either against external symbols, or against
|
||
sections. If we are producing relocateable 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
|
||
relocateable output against an external symbol. */
|
||
|
||
static bfd_reloc_status_type
|
||
mips_generic_reloc (abfd,
|
||
reloc_entry,
|
||
symbol,
|
||
data,
|
||
input_section,
|
||
output_bfd)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
{
|
||
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;
|
||
}
|
||
|
||
/* Do a REFHI relocation. This has to be done in combination with a
|
||
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, so this ought to work. */
|
||
|
||
static bfd_byte *mips_refhi_addr;
|
||
static bfd_vma mips_refhi_addend;
|
||
|
||
static bfd_reloc_status_type
|
||
mips_refhi_reloc (abfd,
|
||
reloc_entry,
|
||
symbol,
|
||
data,
|
||
input_section,
|
||
output_bfd)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
{
|
||
bfd_reloc_status_type ret;
|
||
bfd_vma relocation;
|
||
|
||
/* If we're relocating, and this an external symbol, we don't want
|
||
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 (symbol->section == &bfd_und_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 > input_section->_cooked_size)
|
||
return bfd_reloc_outofrange;
|
||
|
||
/* Save the information, and let REFLO do the actual relocation. */
|
||
mips_refhi_addr = (bfd_byte *) data + reloc_entry->address;
|
||
mips_refhi_addend = relocation;
|
||
|
||
if (output_bfd != (bfd *) NULL)
|
||
reloc_entry->address += input_section->output_offset;
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Do a REFLO relocation. This is a straightforward 16 bit inplace
|
||
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)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
{
|
||
if (mips_refhi_addr != (bfd_byte *) NULL)
|
||
{
|
||
unsigned long insn;
|
||
unsigned long val;
|
||
unsigned long vallo;
|
||
|
||
/* Do the REFHI relocation. Note that we actually don't 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, mips_refhi_addr);
|
||
vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address)
|
||
& 0xffff);
|
||
val = ((insn & 0xffff) << 16) + vallo;
|
||
val += mips_refhi_addend;
|
||
|
||
/* The low order 16 bits are always treated as a signed 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 &~ 0xffff) | ((val >> 16) & 0xffff);
|
||
bfd_put_32 (abfd, insn, mips_refhi_addr);
|
||
|
||
mips_refhi_addr = (bfd_byte *) NULL;
|
||
}
|
||
|
||
/* Now do the REFLO reloc in the usual way. */
|
||
return mips_generic_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd);
|
||
}
|
||
|
||
/* Do a GPREL relocation. This is a 16 bit value which must become
|
||
the offset from the gp register. */
|
||
|
||
static bfd_reloc_status_type
|
||
mips_gprel_reloc (abfd,
|
||
reloc_entry,
|
||
symbol,
|
||
data,
|
||
input_section,
|
||
output_bfd)
|
||
bfd *abfd;
|
||
arelent *reloc_entry;
|
||
asymbol *symbol;
|
||
PTR data;
|
||
asection *input_section;
|
||
bfd *output_bfd;
|
||
{
|
||
boolean relocateable;
|
||
bfd_vma relocation;
|
||
unsigned long val;
|
||
unsigned long insn;
|
||
|
||
/* If we're relocating, and this is an external symbol with no
|
||
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)
|
||
relocateable = true;
|
||
else
|
||
{
|
||
relocateable = false;
|
||
output_bfd = symbol->section->output_section->owner;
|
||
}
|
||
|
||
if (symbol->section == &bfd_und_section
|
||
&& relocateable == false)
|
||
return bfd_reloc_undefined;
|
||
|
||
/* We have to figure out the gp value, so that we can adjust the
|
||
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 relocateable output. */
|
||
if (ecoff_data (output_bfd)->gp == 0
|
||
&& (relocateable == false
|
||
|| (symbol->flags & BSF_SECTION_SYM) != 0))
|
||
{
|
||
if (relocateable != false)
|
||
{
|
||
/* Make up a value. */
|
||
ecoff_data (output_bfd)->gp =
|
||
symbol->section->output_section->vma + 0x4000;
|
||
}
|
||
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)
|
||
{
|
||
ecoff_data (output_bfd)->gp = bfd_asymbol_value (*sym);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (i >= count)
|
||
{
|
||
/* Only get the error once. */
|
||
ecoff_data (output_bfd)->gp = 4;
|
||
/* FIXME: How can we get the program name here? */
|
||
fprintf (stderr,
|
||
"GP relative relocation when _gp not defined\n");
|
||
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 > input_section->_cooked_size)
|
||
return bfd_reloc_outofrange;
|
||
|
||
insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
|
||
|
||
/* Set val to the offset into the section or symbol. */
|
||
val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff;
|
||
if (val & 0x8000)
|
||
val -= 0x10000;
|
||
|
||
/* Adjust val for the final section location and GP value. If we
|
||
are producing relocateable output, we don't want to do this for
|
||
an external symbol. */
|
||
if (relocateable == false
|
||
|| (symbol->flags & BSF_SECTION_SYM) != 0)
|
||
val += relocation - ecoff_data (output_bfd)->gp;
|
||
|
||
insn = (insn &~ 0xffff) | (val & 0xffff);
|
||
bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
|
||
|
||
if (relocateable != false)
|
||
reloc_entry->address += input_section->output_offset;
|
||
|
||
/* Make sure it fit in 16 bits. */
|
||
if (val >= 0x8000 && val < 0xffff8000)
|
||
return bfd_reloc_outofrange;
|
||
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* Get the howto structure for a generic reloc type. */
|
||
|
||
static CONST struct reloc_howto_struct *
|
||
mips_bfd_reloc_type_lookup (abfd, code)
|
||
bfd *abfd;
|
||
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:
|
||
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_MIPS_GPREL:
|
||
mips_type = MIPS_R_GPREL;
|
||
break;
|
||
default:
|
||
return (CONST struct reloc_howto_struct *) NULL;
|
||
}
|
||
|
||
return &mips_howto_table[mips_type];
|
||
}
|
||
|
||
#ifdef HOST_IRIX4
|
||
|
||
#include <core.out.h>
|
||
|
||
struct sgi_core_struct
|
||
{
|
||
int sig;
|
||
char cmd[CORE_NAMESIZE];
|
||
};
|
||
|
||
#define core_hdr(bfd) ((bfd)->tdata.sgi_core_data)
|
||
#define core_signal(bfd) (core_hdr(bfd)->sig)
|
||
#define core_command(bfd) (core_hdr(bfd)->cmd)
|
||
|
||
static asection *
|
||
make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos)
|
||
bfd *abfd;
|
||
CONST char *name;
|
||
flagword flags;
|
||
bfd_size_type _raw_size;
|
||
bfd_vma vma;
|
||
file_ptr filepos;
|
||
{
|
||
asection *asect;
|
||
|
||
asect = bfd_make_section (abfd, name);
|
||
if (!asect)
|
||
return NULL;
|
||
|
||
asect->flags = flags;
|
||
asect->_raw_size = _raw_size;
|
||
asect->vma = vma;
|
||
asect->filepos = filepos;
|
||
asect->alignment_power = 4;
|
||
|
||
return asect;
|
||
}
|
||
|
||
static bfd_target *
|
||
ecoff_core_file_p (abfd)
|
||
bfd *abfd;
|
||
{
|
||
int val;
|
||
int i;
|
||
char *secname;
|
||
struct coreout coreout;
|
||
struct idesc *idg, *idf, *ids;
|
||
|
||
val = bfd_read ((PTR)&coreout, 1, sizeof coreout, abfd);
|
||
if (val != sizeof coreout)
|
||
return 0;
|
||
|
||
if (coreout.c_magic != CORE_MAGIC
|
||
|| coreout.c_version != CORE_VERSION1)
|
||
return 0;
|
||
|
||
core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, sizeof (struct sgi_core_struct));
|
||
if (!core_hdr (abfd))
|
||
return NULL;
|
||
|
||
strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE);
|
||
core_signal (abfd) = coreout.c_sigcause;
|
||
|
||
bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET);
|
||
|
||
for (i = 0; i < coreout.c_nvmap; i++)
|
||
{
|
||
struct vmap vmap;
|
||
|
||
val = bfd_read ((PTR)&vmap, 1, sizeof vmap, abfd);
|
||
if (val != sizeof vmap)
|
||
break;
|
||
|
||
switch (vmap.v_type)
|
||
{
|
||
case VDATA:
|
||
secname = ".data";
|
||
break;
|
||
case VSTACK:
|
||
secname = ".stack";
|
||
break;
|
||
default:
|
||
continue;
|
||
}
|
||
|
||
if (!make_bfd_asection (abfd, secname,
|
||
SEC_ALLOC+SEC_LOAD+SEC_HAS_CONTENTS,
|
||
vmap.v_len,
|
||
vmap.v_vaddr,
|
||
vmap.v_offset,
|
||
2))
|
||
return NULL;
|
||
}
|
||
|
||
/* Make sure that the regs are contiguous within the core file. */
|
||
|
||
idg = &coreout.c_idesc[I_GPREGS];
|
||
idf = &coreout.c_idesc[I_FPREGS];
|
||
ids = &coreout.c_idesc[I_SPECREGS];
|
||
|
||
if (idg->i_offset + idg->i_len != idf->i_offset
|
||
|| idf->i_offset + idf->i_len != ids->i_offset)
|
||
return 0; /* Can't deal with non-contig regs */
|
||
|
||
bfd_seek (abfd, idg->i_offset, SEEK_SET);
|
||
|
||
make_bfd_asection (abfd, ".reg",
|
||
SEC_ALLOC+SEC_HAS_CONTENTS,
|
||
idg->i_len + idf->i_len + ids->i_len,
|
||
0,
|
||
idg->i_offset);
|
||
|
||
/* OK, we believe you. You're a core file (sure, sure). */
|
||
|
||
return abfd->xvec;
|
||
}
|
||
|
||
static char *
|
||
ecoff_core_file_failing_command (abfd)
|
||
bfd *abfd;
|
||
{
|
||
return core_command (abfd);
|
||
}
|
||
|
||
static int
|
||
ecoff_core_file_failing_signal (abfd)
|
||
bfd *abfd;
|
||
{
|
||
return core_signal (abfd);
|
||
}
|
||
|
||
static boolean
|
||
ecoff_core_file_matches_executable_p (core_bfd, exec_bfd)
|
||
bfd *core_bfd, *exec_bfd;
|
||
{
|
||
return true; /* XXX - FIXME */
|
||
}
|
||
#else /* not def HOST_IRIX4 */
|
||
#define ecoff_core_file_p _bfd_dummy_target
|
||
#define ecoff_core_file_failing_command _bfd_dummy_core_file_failing_command
|
||
#define ecoff_core_file_failing_signal _bfd_dummy_core_file_failing_signal
|
||
#define ecoff_core_file_matches_executable_p \
|
||
_bfd_dummy_core_file_matches_executable_p
|
||
#endif
|
||
|
||
/* This is the ECOFF backend structure. The backend field of the
|
||
target vector points to this. */
|
||
|
||
static const struct ecoff_backend_data mips_ecoff_backend_data =
|
||
{
|
||
/* COFF backend structure. */
|
||
{
|
||
(void (*) PARAMS ((bfd *,PTR,int,int,PTR))) bfd_void, /* aux_in */
|
||
(void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_in */
|
||
(void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_in */
|
||
(unsigned (*) PARAMS ((bfd *,PTR,int,int,PTR))) bfd_void, /* aux_out */
|
||
(unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_out */
|
||
(unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_out */
|
||
(unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* reloc_out */
|
||
mips_ecoff_swap_filehdr_out, mips_ecoff_swap_aouthdr_out,
|
||
mips_ecoff_swap_scnhdr_out,
|
||
FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, true,
|
||
mips_ecoff_swap_filehdr_in, mips_ecoff_swap_aouthdr_in,
|
||
mips_ecoff_swap_scnhdr_in, mips_ecoff_bad_format_hook,
|
||
ecoff_set_arch_mach_hook, ecoff_mkobject_hook,
|
||
ecoff_styp_to_sec_flags, ecoff_make_section_hook, ecoff_set_alignment_hook,
|
||
ecoff_slurp_symbol_table, NULL, NULL
|
||
},
|
||
/* Supported architecture. */
|
||
bfd_arch_mips,
|
||
/* Symbol table magic number. */
|
||
magicSym,
|
||
/* Initial portion of armap string. */
|
||
"__________",
|
||
/* Alignment of debugging information. E.g., 4. */
|
||
4,
|
||
/* The page boundary used to align sections in a demand-paged
|
||
executable file. E.g., 0x1000. */
|
||
0x1000,
|
||
/* True if the .rdata section is part of the text segment, as on the
|
||
Alpha. False if .rdata is part of the data segment, as on the
|
||
MIPS. */
|
||
false,
|
||
/* Bitsize of constructor entries. */
|
||
32,
|
||
/* Reloc to use for constructor entries. */
|
||
&mips_howto_table[MIPS_R_REFWORD],
|
||
/* Sizes of external symbolic information. */
|
||
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),
|
||
/* Functions to swap in external symbolic data. */
|
||
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,
|
||
/* Functions to swap out external symbolic data. */
|
||
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,
|
||
/* External reloc size. */
|
||
RELSZ,
|
||
/* Reloc swapping functions. */
|
||
mips_ecoff_swap_reloc_in,
|
||
mips_ecoff_swap_reloc_out,
|
||
/* Backend reloc tweaking. */
|
||
mips_adjust_reloc_in,
|
||
mips_adjust_reloc_out
|
||
};
|
||
|
||
/* Looking up a reloc type is MIPS specific. */
|
||
#define ecoff_bfd_reloc_type_lookup mips_bfd_reloc_type_lookup
|
||
|
||
/* Getting relocated section contents is generic. */
|
||
#define ecoff_bfd_get_relocated_section_contents \
|
||
bfd_generic_get_relocated_section_contents
|
||
|
||
bfd_target ecoff_little_vec =
|
||
{
|
||
"ecoff-littlemips", /* name */
|
||
bfd_target_ecoff_flavour,
|
||
false, /* data byte order is little */
|
||
false, /* header byte order is 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), /* sect
|
||
flags */
|
||
0, /* leading underscore */
|
||
' ', /* ar_pad_char */
|
||
15, /* ar_max_namelen */
|
||
4, /* minimum alignment power */
|
||
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, coff_object_p, /* bfd_check_format */
|
||
ecoff_archive_p, _bfd_dummy_target},
|
||
{bfd_false, ecoff_mkobject, /* bfd_set_format */
|
||
_bfd_generic_mkarchive, bfd_false},
|
||
{bfd_false, ecoff_write_object_contents, /* bfd_write_contents */
|
||
_bfd_write_archive_contents, bfd_false},
|
||
JUMP_TABLE (ecoff),
|
||
(PTR) &mips_ecoff_backend_data
|
||
};
|
||
|
||
bfd_target ecoff_big_vec =
|
||
{
|
||
"ecoff-bigmips", /* name */
|
||
bfd_target_ecoff_flavour,
|
||
true, /* data byte order is big */
|
||
true, /* header byte order is 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), /* sect flags */
|
||
0, /* leading underscore */
|
||
' ', /* ar_pad_char */
|
||
15, /* ar_max_namelen */
|
||
4, /* minimum alignment power */
|
||
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_check_format */
|
||
ecoff_archive_p, ecoff_core_file_p},
|
||
{bfd_false, ecoff_mkobject, /* bfd_set_format */
|
||
_bfd_generic_mkarchive, bfd_false},
|
||
{bfd_false, ecoff_write_object_contents, /* bfd_write_contents */
|
||
_bfd_write_archive_contents, bfd_false},
|
||
JUMP_TABLE(ecoff),
|
||
(PTR) &mips_ecoff_backend_data
|
||
/* Note that there is another bfd_target just above this one. If
|
||
you are adding initializers here, you should be adding them there
|
||
as well. */
|
||
};
|