| 1 | /* BFD back-end for Motorola 88000 COFF "Binary Compatability Standard" files. |
| 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1997, 1998, 1999, 2000, |
| 3 | 2001 |
| 4 | Free Software Foundation, Inc. |
| 5 | Written by Cygnus Support. |
| 6 | |
| 7 | This file is part of BFD, the Binary File Descriptor library. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 22 | |
| 23 | #define M88 1 /* Customize various include files */ |
| 24 | #include "bfd.h" |
| 25 | #include "sysdep.h" |
| 26 | #include "libbfd.h" |
| 27 | #include "coff/m88k.h" |
| 28 | #include "coff/internal.h" |
| 29 | #include "libcoff.h" |
| 30 | |
| 31 | static boolean m88k_is_local_label_name PARAMS ((bfd *, const char *)); |
| 32 | static bfd_reloc_status_type m88k_special_reloc |
| 33 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); |
| 34 | static void rtype2howto PARAMS ((arelent *, struct internal_reloc *)); |
| 35 | static void reloc_processing |
| 36 | PARAMS ((arelent *, struct internal_reloc *, asymbol **, bfd *, asection *)); |
| 37 | |
| 38 | #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3) |
| 39 | |
| 40 | #define GET_SCNHDR_NRELOC H_GET_32 |
| 41 | #define GET_SCNHDR_NLNNO H_GET_32 |
| 42 | |
| 43 | /* On coff-m88k, local labels start with '@'. */ |
| 44 | |
| 45 | #define coff_bfd_is_local_label_name m88k_is_local_label_name |
| 46 | |
| 47 | static boolean |
| 48 | m88k_is_local_label_name (abfd, name) |
| 49 | bfd *abfd ATTRIBUTE_UNUSED; |
| 50 | const char *name; |
| 51 | { |
| 52 | return name[0] == '@'; |
| 53 | } |
| 54 | |
| 55 | static bfd_reloc_status_type |
| 56 | m88k_special_reloc (abfd, reloc_entry, symbol, data, |
| 57 | input_section, output_bfd, error_message) |
| 58 | bfd *abfd; |
| 59 | arelent *reloc_entry; |
| 60 | asymbol *symbol; |
| 61 | PTR data; |
| 62 | asection *input_section; |
| 63 | bfd *output_bfd; |
| 64 | char **error_message ATTRIBUTE_UNUSED; |
| 65 | { |
| 66 | reloc_howto_type *howto = reloc_entry->howto; |
| 67 | |
| 68 | switch (howto->type) |
| 69 | { |
| 70 | case R_HVRT16: |
| 71 | case R_LVRT16: |
| 72 | if (output_bfd != (bfd *) NULL) |
| 73 | { |
| 74 | /* This is a partial relocation, and we want to apply the |
| 75 | relocation to the reloc entry rather than the raw data. |
| 76 | Modify the reloc inplace to reflect what we now know. */ |
| 77 | |
| 78 | reloc_entry->address += input_section->output_offset; |
| 79 | } |
| 80 | else |
| 81 | { |
| 82 | bfd_vma output_base = 0; |
| 83 | bfd_vma addr = reloc_entry->address; |
| 84 | bfd_vma x = bfd_get_16 (abfd, (bfd_byte *) data + addr); |
| 85 | asection *reloc_target_output_section; |
| 86 | long relocation = 0; |
| 87 | |
| 88 | /* Work out which section the relocation is targetted at and the |
| 89 | initial relocation command value. */ |
| 90 | |
| 91 | /* Get symbol value. (Common symbols are special.) */ |
| 92 | if (bfd_is_com_section (symbol->section)) |
| 93 | relocation = 0; |
| 94 | else |
| 95 | relocation = symbol->value; |
| 96 | |
| 97 | reloc_target_output_section = symbol->section->output_section; |
| 98 | |
| 99 | /* Convert input-section-relative symbol value to absolute. */ |
| 100 | if (output_bfd) |
| 101 | output_base = 0; |
| 102 | else |
| 103 | output_base = reloc_target_output_section->vma; |
| 104 | |
| 105 | relocation += output_base + symbol->section->output_offset; |
| 106 | |
| 107 | /* Add in supplied addend. */ |
| 108 | relocation += ((reloc_entry->addend << howto->bitsize) + x); |
| 109 | |
| 110 | reloc_entry->addend = 0; |
| 111 | |
| 112 | relocation >>= (bfd_vma) howto->rightshift; |
| 113 | |
| 114 | /* Shift everything up to where it's going to be used */ |
| 115 | |
| 116 | relocation <<= (bfd_vma) howto->bitpos; |
| 117 | |
| 118 | if (relocation) |
| 119 | bfd_put_16 (abfd, (bfd_vma) relocation, |
| 120 | (unsigned char *) data + addr); |
| 121 | } |
| 122 | |
| 123 | /* If we are not producing relocateable output, return an error if |
| 124 | the symbol is not defined. */ |
| 125 | if (bfd_is_und_section (symbol->section) && output_bfd == (bfd *) NULL) |
| 126 | return bfd_reloc_undefined; |
| 127 | |
| 128 | return bfd_reloc_ok; |
| 129 | |
| 130 | default: |
| 131 | if (output_bfd != (bfd *) NULL) |
| 132 | { |
| 133 | /* This is a partial relocation, and we want to apply the |
| 134 | relocation to the reloc entry rather than the raw data. |
| 135 | Modify the reloc inplace to reflect what we now know. */ |
| 136 | |
| 137 | reloc_entry->address += input_section->output_offset; |
| 138 | return bfd_reloc_ok; |
| 139 | } |
| 140 | break; |
| 141 | } |
| 142 | |
| 143 | if (output_bfd == (bfd *) NULL) |
| 144 | return bfd_reloc_continue; |
| 145 | |
| 146 | return bfd_reloc_ok; |
| 147 | } |
| 148 | |
| 149 | static reloc_howto_type howto_table[] = |
| 150 | { |
| 151 | HOWTO (R_PCR16L, /* type */ |
| 152 | 02, /* rightshift */ |
| 153 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 154 | 16, /* bitsize */ |
| 155 | true, /* pc_relative */ |
| 156 | 0, /* bitpos */ |
| 157 | complain_overflow_signed, /* complain_on_overflow */ |
| 158 | m88k_special_reloc, /* special_function */ |
| 159 | "PCR16L", /* name */ |
| 160 | false, /* partial_inplace */ |
| 161 | 0x0000ffff, /* src_mask */ |
| 162 | 0x0000ffff, /* dst_mask */ |
| 163 | true), /* pcrel_offset */ |
| 164 | |
| 165 | HOWTO (R_PCR26L, /* type */ |
| 166 | 02, /* rightshift */ |
| 167 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 168 | 26, /* bitsize */ |
| 169 | true, /* pc_relative */ |
| 170 | 0, /* bitpos */ |
| 171 | complain_overflow_signed, /* complain_on_overflow */ |
| 172 | m88k_special_reloc, /* special_function */ |
| 173 | "PCR26L", /* name */ |
| 174 | false, /* partial_inplace */ |
| 175 | 0x03ffffff, /* src_mask */ |
| 176 | 0x03ffffff, /* dst_mask */ |
| 177 | true), /* pcrel_offset */ |
| 178 | |
| 179 | HOWTO (R_VRT16, /* type */ |
| 180 | 00, /* rightshift */ |
| 181 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 182 | 16, /* bitsize */ |
| 183 | false, /* pc_relative */ |
| 184 | 0, /* bitpos */ |
| 185 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 186 | m88k_special_reloc, /* special_function */ |
| 187 | "VRT16", /* name */ |
| 188 | false, /* partial_inplace */ |
| 189 | 0x0000ffff, /* src_mask */ |
| 190 | 0x0000ffff, /* dst_mask */ |
| 191 | true), /* pcrel_offset */ |
| 192 | |
| 193 | HOWTO (R_HVRT16, /* type */ |
| 194 | 16, /* rightshift */ |
| 195 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 196 | 16, /* bitsize */ |
| 197 | false, /* pc_relative */ |
| 198 | 0, /* bitpos */ |
| 199 | complain_overflow_dont, /* complain_on_overflow */ |
| 200 | m88k_special_reloc, /* special_function */ |
| 201 | "HVRT16", /* name */ |
| 202 | false, /* partial_inplace */ |
| 203 | 0x0000ffff, /* src_mask */ |
| 204 | 0x0000ffff, /* dst_mask */ |
| 205 | true), /* pcrel_offset */ |
| 206 | |
| 207 | HOWTO (R_LVRT16, /* type */ |
| 208 | 00, /* rightshift */ |
| 209 | 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 210 | 16, /* bitsize */ |
| 211 | false, /* pc_relative */ |
| 212 | 0, /* bitpos */ |
| 213 | complain_overflow_dont, /* complain_on_overflow */ |
| 214 | m88k_special_reloc, /* special_function */ |
| 215 | "LVRT16", /* name */ |
| 216 | false, /* partial_inplace */ |
| 217 | 0x0000ffff, /* src_mask */ |
| 218 | 0x0000ffff, /* dst_mask */ |
| 219 | true), /* pcrel_offset */ |
| 220 | |
| 221 | HOWTO (R_VRT32, /* type */ |
| 222 | 00, /* rightshift */ |
| 223 | 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 224 | 32, /* bitsize */ |
| 225 | false, /* pc_relative */ |
| 226 | 0, /* bitpos */ |
| 227 | complain_overflow_bitfield, /* complain_on_overflow */ |
| 228 | m88k_special_reloc, /* special_function */ |
| 229 | "VRT32", /* name */ |
| 230 | false, /* partial_inplace */ |
| 231 | 0xffffffff, /* src_mask */ |
| 232 | 0xffffffff, /* dst_mask */ |
| 233 | true), /* pcrel_offset */ |
| 234 | }; |
| 235 | |
| 236 | /* Code to turn an external r_type into a pointer to an entry in the |
| 237 | above howto table. */ |
| 238 | static void |
| 239 | rtype2howto (cache_ptr, dst) |
| 240 | arelent *cache_ptr; |
| 241 | struct internal_reloc *dst; |
| 242 | { |
| 243 | if (dst->r_type >= R_PCR16L && dst->r_type <= R_VRT32) |
| 244 | { |
| 245 | cache_ptr->howto = howto_table + dst->r_type - R_PCR16L; |
| 246 | } |
| 247 | else |
| 248 | { |
| 249 | BFD_ASSERT (0); |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | #define RTYPE2HOWTO(cache_ptr, dst) rtype2howto (cache_ptr, dst) |
| 254 | |
| 255 | /* Code to swap in the reloc offset */ |
| 256 | #define SWAP_IN_RELOC_OFFSET H_GET_16 |
| 257 | #define SWAP_OUT_RELOC_OFFSET H_PUT_16 |
| 258 | |
| 259 | #define RELOC_PROCESSING(relent,reloc,symbols,abfd,section) \ |
| 260 | reloc_processing(relent, reloc, symbols, abfd, section) |
| 261 | |
| 262 | static void |
| 263 | reloc_processing (relent, reloc, symbols, abfd, section) |
| 264 | arelent *relent; |
| 265 | struct internal_reloc *reloc; |
| 266 | asymbol **symbols; |
| 267 | bfd *abfd; |
| 268 | asection *section; |
| 269 | { |
| 270 | relent->address = reloc->r_vaddr; |
| 271 | rtype2howto (relent, reloc); |
| 272 | |
| 273 | if (((int) reloc->r_symndx) > 0) |
| 274 | { |
| 275 | relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx]; |
| 276 | } |
| 277 | else |
| 278 | { |
| 279 | relent->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| 280 | } |
| 281 | |
| 282 | relent->addend = reloc->r_offset; |
| 283 | relent->address -= section->vma; |
| 284 | } |
| 285 | |
| 286 | #define BADMAG(x) MC88BADMAG(x) |
| 287 | #include "coffcode.h" |
| 288 | |
| 289 | #undef coff_write_armap |
| 290 | |
| 291 | CREATE_BIG_COFF_TARGET_VEC (m88kbcs_vec, "coff-m88kbcs", 0, 0, '_', NULL) |