| 1 | /* BFD back-end for Motorola 68000 COFF binaries. |
| 2 | Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc. |
| 3 | Written by Cygnus Support. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | #include "bfd.h" |
| 22 | #include "sysdep.h" |
| 23 | #include "libbfd.h" |
| 24 | #include "obstack.h" |
| 25 | #include "coff/m68k.h" |
| 26 | #include "coff/internal.h" |
| 27 | #include "libcoff.h" |
| 28 | |
| 29 | #ifndef LYNX_SPECIAL_FN |
| 30 | #define LYNX_SPECIAL_FN 0 |
| 31 | #endif |
| 32 | |
| 33 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (1) |
| 34 | |
| 35 | /* The page size is a guess based on ELF. */ |
| 36 | #define COFF_PAGE_SIZE 0x2000 |
| 37 | |
| 38 | /* Clean up namespace. */ |
| 39 | #define m68kcoff_howto_table _bfd_m68kcoff_howto_table |
| 40 | #define m68k_rtype2howto _bfd_m68kcoff_rtype2howto |
| 41 | #define m68k_howto2rtype _bfd_m68kcoff_howto2rtype |
| 42 | #define m68k_reloc_type_lookup _bfd_m68kcoff_reloc_type_lookup |
| 43 | |
| 44 | #ifdef ONLY_DECLARE_RELOCS |
| 45 | extern reloc_howto_type m68kcoff_howto_table[]; |
| 46 | #else |
| 47 | reloc_howto_type m68kcoff_howto_table[] = |
| 48 | { |
| 49 | HOWTO(R_RELBYTE, 0, 0, 8, false, 0, complain_overflow_bitfield, LYNX_SPECIAL_FN, "8", true, 0x000000ff,0x000000ff, false), |
| 50 | HOWTO(R_RELWORD, 0, 1, 16, false, 0, complain_overflow_bitfield, LYNX_SPECIAL_FN, "16", true, 0x0000ffff,0x0000ffff, false), |
| 51 | HOWTO(R_RELLONG, 0, 2, 32, false, 0, complain_overflow_bitfield, LYNX_SPECIAL_FN, "32", true, 0xffffffff,0xffffffff, false), |
| 52 | HOWTO(R_PCRBYTE, 0, 0, 8, true, 0, complain_overflow_signed, LYNX_SPECIAL_FN, "DISP8", true, 0x000000ff,0x000000ff, false), |
| 53 | HOWTO(R_PCRWORD, 0, 1, 16, true, 0, complain_overflow_signed, LYNX_SPECIAL_FN, "DISP16", true, 0x0000ffff,0x0000ffff, false), |
| 54 | HOWTO(R_PCRLONG, 0, 2, 32, true, 0, complain_overflow_signed, LYNX_SPECIAL_FN, "DISP32", true, 0xffffffff,0xffffffff, false), |
| 55 | HOWTO(R_RELLONG_NEG, 0, -2, 32, false, 0, complain_overflow_bitfield, LYNX_SPECIAL_FN, "-32", true, 0xffffffff,0xffffffff, false), |
| 56 | }; |
| 57 | #endif /* not ONLY_DECLARE_RELOCS */ |
| 58 | |
| 59 | #ifndef BADMAG |
| 60 | #define BADMAG(x) M68KBADMAG(x) |
| 61 | #endif |
| 62 | #define M68 1 /* Customize coffcode.h */ |
| 63 | |
| 64 | /* Turn a howto into a reloc number */ |
| 65 | |
| 66 | #ifdef ONLY_DECLARE_RELOCS |
| 67 | extern void m68k_rtype2howto PARAMS ((arelent *internal, int relocentry)); |
| 68 | extern int m68k_howto2rtype PARAMS ((CONST struct reloc_howto_struct *)); |
| 69 | extern reloc_howto_type *m68k_reloc_type_lookup |
| 70 | PARAMS ((bfd *, bfd_reloc_code_real_type)); |
| 71 | #else |
| 72 | void |
| 73 | m68k_rtype2howto(internal, relocentry) |
| 74 | arelent *internal; |
| 75 | int relocentry; |
| 76 | { |
| 77 | switch (relocentry) |
| 78 | { |
| 79 | case R_RELBYTE: internal->howto = m68kcoff_howto_table + 0; break; |
| 80 | case R_RELWORD: internal->howto = m68kcoff_howto_table + 1; break; |
| 81 | case R_RELLONG: internal->howto = m68kcoff_howto_table + 2; break; |
| 82 | case R_PCRBYTE: internal->howto = m68kcoff_howto_table + 3; break; |
| 83 | case R_PCRWORD: internal->howto = m68kcoff_howto_table + 4; break; |
| 84 | case R_PCRLONG: internal->howto = m68kcoff_howto_table + 5; break; |
| 85 | case R_RELLONG_NEG: internal->howto = m68kcoff_howto_table + 6; break; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | int |
| 90 | m68k_howto2rtype (internal) |
| 91 | CONST struct reloc_howto_struct *internal; |
| 92 | { |
| 93 | if (internal->pc_relative) |
| 94 | { |
| 95 | switch (internal->bitsize) |
| 96 | { |
| 97 | case 32: return R_PCRLONG; |
| 98 | case 16: return R_PCRWORD; |
| 99 | case 8: return R_PCRBYTE; |
| 100 | } |
| 101 | } |
| 102 | else |
| 103 | { |
| 104 | switch (internal->bitsize) |
| 105 | { |
| 106 | case 32: return R_RELLONG; |
| 107 | case 16: return R_RELWORD; |
| 108 | case 8: return R_RELBYTE; |
| 109 | } |
| 110 | } |
| 111 | return R_RELLONG; |
| 112 | } |
| 113 | |
| 114 | reloc_howto_type * |
| 115 | m68k_reloc_type_lookup (abfd, code) |
| 116 | bfd *abfd; |
| 117 | bfd_reloc_code_real_type code; |
| 118 | { |
| 119 | switch (code) |
| 120 | { |
| 121 | default: return NULL; |
| 122 | case BFD_RELOC_8: return m68kcoff_howto_table + 0; |
| 123 | case BFD_RELOC_16: return m68kcoff_howto_table + 1; |
| 124 | case BFD_RELOC_CTOR: |
| 125 | case BFD_RELOC_32: return m68kcoff_howto_table + 2; |
| 126 | case BFD_RELOC_8_PCREL: return m68kcoff_howto_table + 3; |
| 127 | case BFD_RELOC_16_PCREL: return m68kcoff_howto_table + 4; |
| 128 | case BFD_RELOC_32_PCREL: return m68kcoff_howto_table + 5; |
| 129 | /* FIXME: There doesn't seem to be a code for R_RELLONG_NEG. */ |
| 130 | } |
| 131 | /*NOTREACHED*/ |
| 132 | } |
| 133 | |
| 134 | #endif /* not ONLY_DECLARE_RELOCS */ |
| 135 | |
| 136 | #define RTYPE2HOWTO(internal, relocentry) \ |
| 137 | m68k_rtype2howto(internal, (relocentry)->r_type) |
| 138 | |
| 139 | #define SELECT_RELOC(external, internal) \ |
| 140 | external.r_type = m68k_howto2rtype(internal); |
| 141 | |
| 142 | #define coff_bfd_reloc_type_lookup m68k_reloc_type_lookup |
| 143 | |
| 144 | #define coff_relocate_section _bfd_coff_generic_relocate_section |
| 145 | |
| 146 | #include "coffcode.h" |
| 147 | |
| 148 | const bfd_target |
| 149 | #ifdef TARGET_SYM |
| 150 | TARGET_SYM = |
| 151 | #else |
| 152 | m68kcoff_vec = |
| 153 | #endif |
| 154 | { |
| 155 | #ifdef TARGET_NAME |
| 156 | TARGET_NAME, |
| 157 | #else |
| 158 | "coff-m68k", /* name */ |
| 159 | #endif |
| 160 | bfd_target_coff_flavour, |
| 161 | true, /* data byte order is big */ |
| 162 | true, /* header byte order is big */ |
| 163 | |
| 164 | (HAS_RELOC | EXEC_P | /* object flags */ |
| 165 | HAS_LINENO | HAS_DEBUG | |
| 166 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), |
| 167 | |
| 168 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ |
| 169 | #ifdef NAMES_HAVE_UNDERSCORE |
| 170 | '_', |
| 171 | #else |
| 172 | 0, /* leading underscore */ |
| 173 | #endif |
| 174 | '/', /* ar_pad_char */ |
| 175 | 15, /* ar_max_namelen */ |
| 176 | 1, /* minimum section alignment */ |
| 177 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
| 178 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, |
| 179 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ |
| 180 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
| 181 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, |
| 182 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ |
| 183 | |
| 184 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
| 185 | bfd_generic_archive_p, _bfd_dummy_target}, |
| 186 | {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ |
| 187 | bfd_false}, |
| 188 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ |
| 189 | _bfd_write_archive_contents, bfd_false}, |
| 190 | |
| 191 | BFD_JUMP_TABLE_GENERIC (coff), |
| 192 | BFD_JUMP_TABLE_COPY (coff), |
| 193 | BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| 194 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), |
| 195 | BFD_JUMP_TABLE_SYMBOLS (coff), |
| 196 | BFD_JUMP_TABLE_RELOCS (coff), |
| 197 | BFD_JUMP_TABLE_WRITE (coff), |
| 198 | BFD_JUMP_TABLE_LINK (coff), |
| 199 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| 200 | |
| 201 | COFF_SWAP_TABLE |
| 202 | }; |