| 1 | /* BFD back-end for Intel 960 COFF files. |
| 2 | Copyright (C) 1990, 1991, 1992, 1993 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 | #define I960 1 |
| 22 | #define BADMAG(x) I960BADMAG(x) |
| 23 | |
| 24 | #include "bfd.h" |
| 25 | #include "sysdep.h" |
| 26 | #include "libbfd.h" |
| 27 | #include "obstack.h" |
| 28 | #include "coff/i960.h" |
| 29 | #include "coff/internal.h" |
| 30 | #include "libcoff.h" /* to allow easier abstraction-breaking */ |
| 31 | |
| 32 | static bfd_reloc_status_type optcall_callback |
| 33 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 34 | |
| 35 | #define COFF_LONG_FILENAMES |
| 36 | |
| 37 | #define CALLS 0x66003800 /* Template for 'calls' instruction */ |
| 38 | #define BAL 0x0b000000 /* Template for 'bal' instruction */ |
| 39 | #define BAL_MASK 0x00ffffff |
| 40 | |
| 41 | static bfd_reloc_status_type |
| 42 | optcall_callback (abfd, reloc_entry, symbol_in, data, |
| 43 | ignore_input_section, ignore_bfd, error_message) |
| 44 | bfd *abfd; |
| 45 | arelent *reloc_entry; |
| 46 | asymbol *symbol_in; |
| 47 | PTR data; |
| 48 | asection *ignore_input_section; |
| 49 | bfd *ignore_bfd; |
| 50 | char **error_message; |
| 51 | { |
| 52 | /* This item has already been relocated correctly, but we may be |
| 53 | * able to patch in yet better code - done by digging out the |
| 54 | * correct info on this symbol */ |
| 55 | bfd_reloc_status_type result; |
| 56 | coff_symbol_type *cs = coffsymbol(symbol_in); |
| 57 | |
| 58 | /* So the target symbol has to be of coff type, and the symbol |
| 59 | has to have the correct native information within it */ |
| 60 | if ((bfd_asymbol_flavour(&cs->symbol) != bfd_target_coff_flavour) |
| 61 | || (cs->native == (combined_entry_type *)NULL)) |
| 62 | { |
| 63 | /* This is interesting, consider the case where we're outputting coff |
| 64 | from a mix n match input, linking from coff to a symbol defined in a |
| 65 | bout file will cause this match to be true. Should I complain? This |
| 66 | will only work if the bout symbol is non leaf. */ |
| 67 | *error_message = |
| 68 | (char *) "uncertain calling convention for non-COFF symbol"; |
| 69 | result = bfd_reloc_dangerous; |
| 70 | } |
| 71 | else |
| 72 | { |
| 73 | switch (cs->native->u.syment.n_sclass) |
| 74 | { |
| 75 | case C_LEAFSTAT: |
| 76 | case C_LEAFEXT: |
| 77 | /* This is a call to a leaf procedure, replace instruction with a bal |
| 78 | to the correct location. */ |
| 79 | { |
| 80 | union internal_auxent *aux = &((cs->native+2)->u.auxent); |
| 81 | int word = bfd_get_32(abfd, (bfd_byte *)data + reloc_entry->address); |
| 82 | int olf = (aux->x_bal.x_balntry - cs->native->u.syment.n_value); |
| 83 | BFD_ASSERT(cs->native->u.syment.n_numaux==2); |
| 84 | |
| 85 | /* We replace the original call instruction with a bal to |
| 86 | the bal entry point - the offset of which is described in |
| 87 | the 2nd auxent of the original symbol. We keep the native |
| 88 | sym and auxents untouched, so the delta between the two |
| 89 | is the offset of the bal entry point. */ |
| 90 | word = ((word + olf) & BAL_MASK) | BAL; |
| 91 | bfd_put_32(abfd, word, (bfd_byte *) data + reloc_entry->address); |
| 92 | } |
| 93 | result = bfd_reloc_ok; |
| 94 | break; |
| 95 | case C_SCALL: |
| 96 | /* This is a call to a system call, replace with a calls to # */ |
| 97 | BFD_ASSERT(0); |
| 98 | result = bfd_reloc_ok; |
| 99 | break; |
| 100 | default: |
| 101 | result = bfd_reloc_ok; |
| 102 | break; |
| 103 | } |
| 104 | } |
| 105 | return result; |
| 106 | } |
| 107 | |
| 108 | static reloc_howto_type howto_rellong = |
| 109 | { (unsigned int) R_RELLONG, 0, 2, 32,false, 0, |
| 110 | complain_overflow_bitfield, 0,"rellong", true, 0xffffffff, |
| 111 | 0xffffffff}; |
| 112 | static reloc_howto_type howto_iprmed = |
| 113 | { R_IPRMED, 0, 2, 24,true,0, complain_overflow_signed,0, |
| 114 | "iprmed ", true, 0x00ffffff, 0x00ffffff}; |
| 115 | static reloc_howto_type howto_optcall = |
| 116 | { R_OPTCALL, 0,2,24,true,0, complain_overflow_signed, |
| 117 | optcall_callback, "optcall", true, 0x00ffffff, 0x00ffffff}; |
| 118 | |
| 119 | static const reloc_howto_type * |
| 120 | coff_i960_reloc_type_lookup (abfd, code) |
| 121 | bfd *abfd; |
| 122 | bfd_reloc_code_real_type code; |
| 123 | { |
| 124 | switch (code) |
| 125 | { |
| 126 | default: |
| 127 | return 0; |
| 128 | case BFD_RELOC_I960_CALLJ: |
| 129 | return &howto_optcall; |
| 130 | case BFD_RELOC_32: |
| 131 | return &howto_rellong; |
| 132 | case BFD_RELOC_24_PCREL: |
| 133 | return &howto_iprmed; |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | /* The real code is in coffcode.h */ |
| 138 | |
| 139 | #define RTYPE2HOWTO(cache_ptr, dst) \ |
| 140 | { \ |
| 141 | reloc_howto_type *howto_ptr; \ |
| 142 | switch ((dst)->r_type) { \ |
| 143 | case 17: howto_ptr = &howto_rellong; break; \ |
| 144 | case 25: howto_ptr = &howto_iprmed; break; \ |
| 145 | case 27: howto_ptr = &howto_optcall; break; \ |
| 146 | default: howto_ptr = 0; break; \ |
| 147 | } \ |
| 148 | cache_ptr->howto = howto_ptr; \ |
| 149 | } |
| 150 | |
| 151 | #include "coffcode.h" |
| 152 | |
| 153 | #undef coff_bfd_reloc_type_lookup |
| 154 | #define coff_bfd_reloc_type_lookup coff_i960_reloc_type_lookup |
| 155 | |
| 156 | bfd_target icoff_little_vec = |
| 157 | { |
| 158 | "coff-Intel-little", /* name */ |
| 159 | bfd_target_coff_flavour, |
| 160 | false, /* data byte order is little */ |
| 161 | false, /* header byte order is little */ |
| 162 | |
| 163 | (HAS_RELOC | EXEC_P | /* object flags */ |
| 164 | HAS_LINENO | HAS_DEBUG | |
| 165 | HAS_SYMS | HAS_LOCALS | WP_TEXT), |
| 166 | |
| 167 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ |
| 168 | 0, /* leading underscore */ |
| 169 | '/', /* ar_pad_char */ |
| 170 | 15, /* ar_max_namelen */ |
| 171 | |
| 172 | 3, /* minimum alignment power */ |
| 173 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 174 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 175 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ |
| 176 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 177 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 178 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ |
| 179 | |
| 180 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
| 181 | bfd_generic_archive_p, _bfd_dummy_target}, |
| 182 | {bfd_false, coff_mkobject, /* bfd_set_format */ |
| 183 | _bfd_generic_mkarchive, bfd_false}, |
| 184 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ |
| 185 | _bfd_write_archive_contents, bfd_false}, |
| 186 | |
| 187 | BFD_JUMP_TABLE_GENERIC (coff), |
| 188 | BFD_JUMP_TABLE_COPY (coff), |
| 189 | BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| 190 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), |
| 191 | BFD_JUMP_TABLE_SYMBOLS (coff), |
| 192 | BFD_JUMP_TABLE_RELOCS (coff), |
| 193 | BFD_JUMP_TABLE_WRITE (coff), |
| 194 | BFD_JUMP_TABLE_LINK (coff), |
| 195 | |
| 196 | COFF_SWAP_TABLE, |
| 197 | }; |
| 198 | |
| 199 | |
| 200 | bfd_target icoff_big_vec = |
| 201 | { |
| 202 | "coff-Intel-big", /* name */ |
| 203 | bfd_target_coff_flavour, |
| 204 | false, /* data byte order is little */ |
| 205 | true, /* header byte order is big */ |
| 206 | |
| 207 | (HAS_RELOC | EXEC_P | /* object flags */ |
| 208 | HAS_LINENO | HAS_DEBUG | |
| 209 | HAS_SYMS | HAS_LOCALS | WP_TEXT), |
| 210 | |
| 211 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ |
| 212 | 0, /* leading underscore */ |
| 213 | '/', /* ar_pad_char */ |
| 214 | 15, /* ar_max_namelen */ |
| 215 | |
| 216 | 3, /* minimum alignment power */ |
| 217 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| 218 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| 219 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ |
| 220 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
| 221 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, |
| 222 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ |
| 223 | |
| 224 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
| 225 | bfd_generic_archive_p, _bfd_dummy_target}, |
| 226 | {bfd_false, coff_mkobject, /* bfd_set_format */ |
| 227 | _bfd_generic_mkarchive, bfd_false}, |
| 228 | {bfd_false, coff_write_object_contents, /* bfd_write_contents */ |
| 229 | _bfd_write_archive_contents, bfd_false}, |
| 230 | |
| 231 | BFD_JUMP_TABLE_GENERIC (coff), |
| 232 | BFD_JUMP_TABLE_COPY (coff), |
| 233 | BFD_JUMP_TABLE_CORE (_bfd_nocore), |
| 234 | BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), |
| 235 | BFD_JUMP_TABLE_SYMBOLS (coff), |
| 236 | BFD_JUMP_TABLE_RELOCS (coff), |
| 237 | BFD_JUMP_TABLE_WRITE (coff), |
| 238 | BFD_JUMP_TABLE_LINK (coff), |
| 239 | |
| 240 | COFF_SWAP_TABLE, |
| 241 | }; |