203 lines
6.6 KiB
C
203 lines
6.6 KiB
C
/* BFD back-end for Motorola 68000 COFF binaries.
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Copyright 1990, 1991, 1992, 1993, 1994 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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#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/m68k.h"
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#include "coff/internal.h"
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#include "libcoff.h"
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#ifndef LYNX_SPECIAL_FN
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#define LYNX_SPECIAL_FN 0
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#endif
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#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1)
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/* The page size is a guess based on ELF. */
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#define COFF_PAGE_SIZE 0x2000
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/* Clean up namespace. */
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#define m68kcoff_howto_table _bfd_m68kcoff_howto_table
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#define m68k_rtype2howto _bfd_m68kcoff_rtype2howto
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#define m68k_howto2rtype _bfd_m68kcoff_howto2rtype
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#define m68k_reloc_type_lookup _bfd_m68kcoff_reloc_type_lookup
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#ifdef ONLY_DECLARE_RELOCS
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extern reloc_howto_type m68kcoff_howto_table[];
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#else
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reloc_howto_type m68kcoff_howto_table[] =
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{
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HOWTO(R_RELBYTE, 0, 0, 8, false, 0, complain_overflow_bitfield, LYNX_SPECIAL_FN, "8", true, 0x000000ff,0x000000ff, false),
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HOWTO(R_RELWORD, 0, 1, 16, false, 0, complain_overflow_bitfield, LYNX_SPECIAL_FN, "16", true, 0x0000ffff,0x0000ffff, false),
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HOWTO(R_RELLONG, 0, 2, 32, false, 0, complain_overflow_bitfield, LYNX_SPECIAL_FN, "32", true, 0xffffffff,0xffffffff, false),
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HOWTO(R_PCRBYTE, 0, 0, 8, true, 0, complain_overflow_signed, LYNX_SPECIAL_FN, "DISP8", true, 0x000000ff,0x000000ff, false),
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HOWTO(R_PCRWORD, 0, 1, 16, true, 0, complain_overflow_signed, LYNX_SPECIAL_FN, "DISP16", true, 0x0000ffff,0x0000ffff, false),
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HOWTO(R_PCRLONG, 0, 2, 32, true, 0, complain_overflow_signed, LYNX_SPECIAL_FN, "DISP32", true, 0xffffffff,0xffffffff, false),
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HOWTO(R_RELLONG_NEG, 0, -2, 32, false, 0, complain_overflow_bitfield, LYNX_SPECIAL_FN, "-32", true, 0xffffffff,0xffffffff, false),
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};
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#endif /* not ONLY_DECLARE_RELOCS */
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#ifndef BADMAG
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#define BADMAG(x) M68KBADMAG(x)
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#endif
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#define M68 1 /* Customize coffcode.h */
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/* Turn a howto into a reloc number */
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#ifdef ONLY_DECLARE_RELOCS
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extern void m68k_rtype2howto PARAMS ((arelent *internal, int relocentry));
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extern int m68k_howto2rtype PARAMS ((CONST struct reloc_howto_struct *));
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extern reloc_howto_type *m68k_reloc_type_lookup
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PARAMS ((bfd *, bfd_reloc_code_real_type));
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#else
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void
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m68k_rtype2howto(internal, relocentry)
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arelent *internal;
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int relocentry;
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{
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switch (relocentry)
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{
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case R_RELBYTE: internal->howto = m68kcoff_howto_table + 0; break;
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case R_RELWORD: internal->howto = m68kcoff_howto_table + 1; break;
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case R_RELLONG: internal->howto = m68kcoff_howto_table + 2; break;
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case R_PCRBYTE: internal->howto = m68kcoff_howto_table + 3; break;
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case R_PCRWORD: internal->howto = m68kcoff_howto_table + 4; break;
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case R_PCRLONG: internal->howto = m68kcoff_howto_table + 5; break;
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case R_RELLONG_NEG: internal->howto = m68kcoff_howto_table + 6; break;
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}
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}
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int
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m68k_howto2rtype (internal)
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CONST struct reloc_howto_struct *internal;
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{
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if (internal->pc_relative)
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{
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switch (internal->bitsize)
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{
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case 32: return R_PCRLONG;
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case 16: return R_PCRWORD;
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case 8: return R_PCRBYTE;
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}
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}
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else
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{
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switch (internal->bitsize)
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{
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case 32: return R_RELLONG;
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case 16: return R_RELWORD;
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case 8: return R_RELBYTE;
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}
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}
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return R_RELLONG;
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}
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reloc_howto_type *
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m68k_reloc_type_lookup (abfd, code)
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bfd *abfd;
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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: return NULL;
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case BFD_RELOC_8: return m68kcoff_howto_table + 0;
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case BFD_RELOC_16: return m68kcoff_howto_table + 1;
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case BFD_RELOC_CTOR:
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case BFD_RELOC_32: return m68kcoff_howto_table + 2;
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case BFD_RELOC_8_PCREL: return m68kcoff_howto_table + 3;
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case BFD_RELOC_16_PCREL: return m68kcoff_howto_table + 4;
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case BFD_RELOC_32_PCREL: return m68kcoff_howto_table + 5;
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/* FIXME: There doesn't seem to be a code for R_RELLONG_NEG. */
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}
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/*NOTREACHED*/
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}
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#endif /* not ONLY_DECLARE_RELOCS */
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#define RTYPE2HOWTO(internal, relocentry) \
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m68k_rtype2howto(internal, (relocentry)->r_type)
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#define SELECT_RELOC(external, internal) \
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external.r_type = m68k_howto2rtype(internal);
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#define coff_bfd_reloc_type_lookup m68k_reloc_type_lookup
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#define coff_relocate_section _bfd_coff_generic_relocate_section
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#include "coffcode.h"
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const bfd_target
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#ifdef TARGET_SYM
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TARGET_SYM =
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#else
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m68kcoff_vec =
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#endif
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{
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#ifdef TARGET_NAME
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TARGET_NAME,
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#else
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"coff-m68k", /* name */
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#endif
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bfd_target_coff_flavour,
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true, /* data byte order is big */
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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 | WP_TEXT | D_PAGED),
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(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
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#ifdef NAMES_HAVE_UNDERSCORE
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'_',
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#else
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0, /* leading underscore */
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#endif
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'/', /* ar_pad_char */
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15, /* ar_max_namelen */
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1, /* minimum section alignment */
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bfd_getb64, bfd_getb_signed_64, bfd_putb64,
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bfd_getb32, bfd_getb_signed_32, bfd_putb32,
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bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
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bfd_getb64, bfd_getb_signed_64, bfd_putb64,
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bfd_getb32, bfd_getb_signed_32, bfd_putb32,
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bfd_getb16, bfd_getb_signed_16, bfd_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_generic_mkarchive, /* bfd_set_format */
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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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BFD_JUMP_TABLE_GENERIC (coff),
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BFD_JUMP_TABLE_COPY (coff),
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BFD_JUMP_TABLE_CORE (_bfd_nocore),
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BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
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BFD_JUMP_TABLE_SYMBOLS (coff),
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BFD_JUMP_TABLE_RELOCS (coff),
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BFD_JUMP_TABLE_WRITE (coff),
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BFD_JUMP_TABLE_LINK (coff),
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BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
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COFF_SWAP_TABLE
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};
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