208 lines
6.8 KiB
C
208 lines
6.8 KiB
C
/* Intel 960 COFF support for BFD.
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Copyright (C) 1990-1991 Free Software Foundation, Inc.
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Written by Cygnus Support.
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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
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the Free Software Foundation; either version 2 of the License, or
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(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
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#define I960 1
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#define BADMAG(x) I960BADMAG(x)
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "obstack.h"
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#include "coff/i960.h"
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#include "coff/internal.h"
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#include "libcoff.h" /* to allow easier abstraction-breaking */
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#define COFF_LONG_FILENAMES
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#define CALLS 0x66003800 /* Template for 'calls' instruction */
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#define BAL 0x0b000000 /* Template for 'bal' instruction */
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#define BAL_MASK 0x00ffffff
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static bfd_reloc_status_type
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DEFUN (optcall_callback, (abfd, reloc_entry, symbol_in, data,
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ignore_input_section, ignore_bfd),
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bfd *abfd AND
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arelent *reloc_entry AND
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asymbol *symbol_in AND
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PTR data AND
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asection *ignore_input_section AND
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bfd *ignore_bfd)
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{
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/* This item has already been relocated correctly, but we may be
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* able to patch in yet better code - done by digging out the
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* correct info on this symbol */
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bfd_reloc_status_type result;
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coff_symbol_type *cs = coffsymbol(symbol_in);
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/* So the target symbol has to be of coff type, and the symbol
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has to have the correct native information within it */
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if ((cs->symbol.the_bfd->xvec->flavour != bfd_target_coff_flavour)
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|| (cs->native == (combined_entry_type *)NULL)) {
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/* This is interesting, consider the case where we're outputting */
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/* coff from a mix n match input, linking from coff to a symbol */
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/* defined in a bout file will cause this match to be true. Should */
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/* I complain ? - This will only work if the bout symbol is non */
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/* leaf. */
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result = bfd_reloc_dangerous;
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}
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else {
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switch (cs->native->u.syment.n_sclass)
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{
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case C_LEAFSTAT:
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case C_LEAFEXT:
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/* This is a call to a leaf procedure, replace instruction with a bal
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to the correct location */
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{
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union internal_auxent *aux = &((cs->native+2)->u.auxent);
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int word = bfd_get_32(abfd, (bfd_byte *)data + reloc_entry->address);
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int olf = (aux->x_bal.x_balntry - cs->native->u.syment.n_value);
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BFD_ASSERT(cs->native->u.syment.n_numaux==2);
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/* We replace the original call instruction with a bal to */
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/* the bal entry point - the offset of which is described in the */
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/* 2nd auxent of the original symbol. We keep the native sym and */
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/* auxents untouched, so the delta between the two is the */
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/* offset of the bal entry point */
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word = ((word + olf) & BAL_MASK) | BAL;
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bfd_put_32(abfd, word, (bfd_byte *) data + reloc_entry->address);
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}
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result = bfd_reloc_ok;
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break;
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case C_SCALL:
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/* This is a call to a system call, replace with a calls to # */
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BFD_ASSERT(0);
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result = bfd_reloc_ok;
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break;
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default:
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result = bfd_reloc_ok;
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break;
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}
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}
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return result;
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}
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static reloc_howto_type howto_rellong =
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{ (unsigned int) R_RELLONG, 0, 2, 32,false, 0, true, true,
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0,"rellong", true, 0xffffffff, 0xffffffff};
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static reloc_howto_type howto_iprmed =
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{ R_IPRMED, 0, 2, 24,true,0, true, true,0,"iprmed ", true,
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0x00ffffff, 0x00ffffff};
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static reloc_howto_type howto_optcall =
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{ R_OPTCALL, 0,2,24,true,0, true, true, optcall_callback,
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"optcall", true, 0x00ffffff, 0x00ffffff};
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static reloc_howto_type *
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DEFUN (coff_i960_reloc_type_lookup, (abfd, code),
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bfd *abfd AND
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bfd_reloc_code_real_type code)
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{
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switch (code)
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{
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default:
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return 0;
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case BFD_RELOC_I960_CALLJ:
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return &howto_optcall;
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case BFD_RELOC_32:
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return &howto_rellong;
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case BFD_RELOC_24_PCREL:
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return &howto_iprmed;
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}
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}
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/* The real code is in coffcode.h */
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#define RTYPE2HOWTO(cache_ptr, dst) \
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{ \
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reloc_howto_type *howto_ptr; \
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switch ((dst)->r_type) { \
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case 17: howto_ptr = &howto_rellong; break; \
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case 25: howto_ptr = &howto_iprmed; break; \
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case 27: howto_ptr = &howto_optcall; break; \
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default: howto_ptr = 0; break; \
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} \
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cache_ptr->howto = howto_ptr; \
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}
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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 */
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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 */
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HAS_LINENO | HAS_DEBUG |
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HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
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(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
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0, /* leading underscore */
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'/', /* ar_pad_char */
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15, /* ar_max_namelen */
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3, /* minimum alignment power */
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_do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
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_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 */
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bfd_generic_archive_p, _bfd_dummy_target},
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{bfd_false, coff_mkobject, /* bfd_set_format */
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_bfd_generic_mkarchive, bfd_false},
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{bfd_false, coff_write_object_contents, /* bfd_write_contents */
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_bfd_write_archive_contents, bfd_false},
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JUMP_TABLE(coff),
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COFF_SWAP_TABLE,
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coff_i960_reloc_type_lookup,
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coff_make_debug_symbol,
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};
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bfd_target icoff_big_vec =
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{
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"coff-Intel-big", /* name */
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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 */
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HAS_LINENO | HAS_DEBUG |
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HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT),
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(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
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0, /* leading underscore */
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'/', /* ar_pad_char */
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15, /* ar_max_namelen */
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3, /* minimum alignment power */
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_do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
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_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 */
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bfd_generic_archive_p, _bfd_dummy_target},
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{bfd_false, coff_mkobject, /* bfd_set_format */
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_bfd_generic_mkarchive, bfd_false},
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{bfd_false, coff_write_object_contents, /* bfd_write_contents */
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_bfd_write_archive_contents, bfd_false},
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JUMP_TABLE(coff),
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COFF_SWAP_TABLE,
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coff_i960_reloc_type_lookup,
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coff_make_debug_symbol,
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};
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