old-cross-binutils/bfd/coff-i960.c

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/* Intel 960 COFF support for BFD.
Copyright (C) 1990-1991 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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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.
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This program is distributed in the hope that it will be useful,
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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. */
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#define I960 1
#define BADMAG(x) I960BADMAG(x)
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#include "bfd.h"
#include "sysdep.h"
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#include "libbfd.h"
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#include "obstack.h"
#include "coff/i960.h"
#include "coff/internal.h"
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#include "libcoff.h" /* to allow easier abstraction-breaking */
#define COFF_LONG_FILENAMES
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#define CALLS 0x66003800 /* Template for 'calls' instruction */
#define BAL 0x0b000000 /* Template for 'bal' instruction */
#define BAL_MASK 0x00ffffff
static bfd_reloc_status_type
DEFUN (optcall_callback, (abfd, reloc_entry, symbol_in, data,
ignore_input_section, ignore_bfd),
bfd *abfd AND
arelent *reloc_entry AND
asymbol *symbol_in AND
PTR data AND
asection *ignore_input_section AND
bfd *ignore_bfd)
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{
/* This item has already been relocated correctly, but we may be
* able to patch in yet better code - done by digging out the
* correct info on this symbol */
bfd_reloc_status_type result;
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coff_symbol_type *cs = coffsymbol(symbol_in);
/* So the target symbol has to be of coff type, and the symbol
has to have the correct native information within it */
if ((cs->symbol.the_bfd->xvec->flavour != bfd_target_coff_flavour)
|| (cs->native == (combined_entry_type *)NULL)) {
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/* This is interesting, consider the case where we're outputting */
/* coff from a mix n match input, linking from coff to a symbol */
/* defined in a bout file will cause this match to be true. Should */
/* I complain ? - This will only work if the bout symbol is non */
/* leaf. */
result = bfd_reloc_dangerous;
}
else {
switch (cs->native->u.syment.n_sclass)
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{
case C_LEAFSTAT:
case C_LEAFEXT:
/* This is a call to a leaf procedure, replace instruction with a bal
to the correct location */
{
union internal_auxent *aux = &((cs->native+2)->u.auxent);
int word = bfd_get_32(abfd, (bfd_byte *)data + reloc_entry->address);
int olf = (aux->x_bal.x_balntry - cs->native->u.syment.n_value);
BFD_ASSERT(cs->native->u.syment.n_numaux==2);
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/* We replace the original call instruction with a bal to */
/* the bal entry point - the offset of which is described in the */
/* 2nd auxent of the original symbol. We keep the native sym and */
/* auxents untouched, so the delta between the two is the */
/* offset of the bal entry point */
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word = ((word + olf) & BAL_MASK) | BAL;
bfd_put_32(abfd, word, (bfd_byte *) data + reloc_entry->address);
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}
result = bfd_reloc_ok;
break;
case C_SCALL:
/* This is a call to a system call, replace with a calls to # */
BFD_ASSERT(0);
result = bfd_reloc_ok;
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break;
default:
result = bfd_reloc_ok;
break;
}
}
return result;
}
static reloc_howto_type howto_rellong =
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{ (unsigned int) R_RELLONG, 0, 2, 32,false, 0, true, true,
0,"rellong", true, 0xffffffff, 0xffffffff};
static reloc_howto_type howto_iprmed =
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{ R_IPRMED, 0, 2, 24,true,0, true, true,0,"iprmed ", true,
0x00ffffff, 0x00ffffff};
static reloc_howto_type howto_optcall =
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{ R_OPTCALL, 0,2,24,true,0, true, true, optcall_callback,
"optcall", true, 0x00ffffff, 0x00ffffff};
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static reloc_howto_type *
DEFUN (coff_i960_reloc_type_lookup, (abfd, code),
bfd *abfd AND
bfd_reloc_code_real_type code)
{
switch (code)
{
default:
return 0;
case BFD_RELOC_I960_CALLJ:
return &howto_optcall;
case BFD_RELOC_32:
return &howto_rellong;
case BFD_RELOC_24_PCREL:
return &howto_iprmed;
}
}
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/* The real code is in coffcode.h */
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#define RTYPE2HOWTO(cache_ptr, dst) \
{ \
reloc_howto_type *howto_ptr; \
switch ((dst)->r_type) { \
case 17: howto_ptr = &howto_rellong; break; \
case 25: howto_ptr = &howto_iprmed; break; \
case 27: howto_ptr = &howto_optcall; break; \
default: howto_ptr = 0; break; \
} \
cache_ptr->howto = howto_ptr; \
}
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#include "coffcode.h"
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bfd_target icoff_little_vec =
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{
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"coff-Intel-little", /* name */
bfd_target_coff_flavour,
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false, /* data byte order is little */
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false, /* header byte order is little */
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(HAS_RELOC | EXEC_P | /* object flags */
HAS_LINENO | HAS_DEBUG |
HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
0, /* leading underscore */
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'/', /* ar_pad_char */
15, /* ar_max_namelen */
3, /* minimum alignment power */
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_do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
_do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* hdrs */
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{_bfd_dummy_target, coff_object_p, /* bfd_check_format */
bfd_generic_archive_p, _bfd_dummy_target},
{bfd_false, coff_mkobject, /* bfd_set_format */
_bfd_generic_mkarchive, bfd_false},
{bfd_false, coff_write_object_contents, /* bfd_write_contents */
_bfd_write_archive_contents, bfd_false},
JUMP_TABLE(coff),
COFF_SWAP_TABLE,
coff_i960_reloc_type_lookup,
coff_make_debug_symbol,
};
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bfd_target icoff_big_vec =
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{
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"coff-Intel-big", /* name */
bfd_target_coff_flavour,
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false, /* data byte order is little */
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true, /* header byte order is big */
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(HAS_RELOC | EXEC_P | /* object flags */
HAS_LINENO | HAS_DEBUG |
HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
0, /* leading underscore */
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'/', /* ar_pad_char */
15, /* ar_max_namelen */
3, /* minimum alignment power */
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_do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
_do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
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{_bfd_dummy_target, coff_object_p, /* bfd_check_format */
bfd_generic_archive_p, _bfd_dummy_target},
{bfd_false, coff_mkobject, /* bfd_set_format */
_bfd_generic_mkarchive, bfd_false},
{bfd_false, coff_write_object_contents, /* bfd_write_contents */
_bfd_write_archive_contents, bfd_false},
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JUMP_TABLE(coff),
COFF_SWAP_TABLE,
coff_i960_reloc_type_lookup,
coff_make_debug_symbol,
};