1 /* BFD back-end for Irix core files. 2 Copyright 1993, 1994, 1996, 1999, 2001, 2002, 2004 3 Free Software Foundation, Inc. 4 Written by Stu Grossman, Cygnus Support. 5 Converted to back-end form by Ian Lance Taylor, 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23 /* This file can only be compiled on systems which use Irix style core 24 files (namely, Irix 4 and Irix 5, so far). */ 25 26 #include "bfd.h" 27 #include "sysdep.h" 28 #include "libbfd.h" 29 30 #ifdef IRIX_CORE 31 32 #include <core.out.h> 33 34 struct sgi_core_struct 35 { 36 int sig; 37 char cmd[CORE_NAMESIZE]; 38 }; 39 40 #define core_hdr(bfd) ((bfd)->tdata.sgi_core_data) 41 #define core_signal(bfd) (core_hdr(bfd)->sig) 42 #define core_command(bfd) (core_hdr(bfd)->cmd) 43 44 #define irix_core_core_file_matches_executable_p generic_core_file_matches_executable_p 45 46 static asection *make_bfd_asection 47 (bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr); 48 49 /* Helper function for irix_core_core_file_p: 50 32-bit and 64-bit versions. */ 51 52 #ifdef CORE_MAGIC64 53 static int 54 do_sections64 (bfd *abfd, struct coreout *coreout) 55 { 56 struct vmap64 vmap; 57 char *secname; 58 int i, val; 59 60 for (i = 0; i < coreout->c_nvmap; i++) 61 { 62 val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd); 63 if (val != sizeof vmap) 64 break; 65 66 switch (vmap.v_type) 67 { 68 case VDATA: 69 secname = ".data"; 70 break; 71 case VSTACK: 72 secname = ".stack"; 73 break; 74 #ifdef VMAPFILE 75 case VMAPFILE: 76 secname = ".mapfile"; 77 break; 78 #endif 79 default: 80 continue; 81 } 82 83 /* A file offset of zero means that the 84 section is not contained in the corefile. */ 85 if (vmap.v_offset == 0) 86 continue; 87 88 if (!make_bfd_asection (abfd, secname, 89 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS, 90 vmap.v_len, vmap.v_vaddr, vmap.v_offset)) 91 /* Fail. */ 92 return 0; 93 } 94 95 return 1; 96 } 97 #endif 98 99 /* 32-bit version. */ 100 101 static int 102 do_sections (bfd *abfd, struct coreout *coreout) 103 { 104 struct vmap vmap; 105 char *secname; 106 int i, val; 107 108 for (i = 0; i < coreout->c_nvmap; i++) 109 { 110 val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd); 111 if (val != sizeof vmap) 112 break; 113 114 switch (vmap.v_type) 115 { 116 case VDATA: 117 secname = ".data"; 118 break; 119 case VSTACK: 120 secname = ".stack"; 121 break; 122 #ifdef VMAPFILE 123 case VMAPFILE: 124 secname = ".mapfile"; 125 break; 126 #endif 127 default: 128 continue; 129 } 130 131 /* A file offset of zero means that the 132 section is not contained in the corefile. */ 133 if (vmap.v_offset == 0) 134 continue; 135 136 if (!make_bfd_asection (abfd, secname, 137 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS, 138 vmap.v_len, vmap.v_vaddr, vmap.v_offset)) 139 /* Fail. */ 140 return 0; 141 } 142 return 1; 143 } 144 145 static asection * 146 make_bfd_asection (bfd *abfd, 147 const char *name, 148 flagword flags, 149 bfd_size_type size, 150 bfd_vma vma, 151 file_ptr filepos) 152 { 153 asection *asect; 154 155 asect = bfd_make_section_anyway (abfd, name); 156 if (!asect) 157 return NULL; 158 159 asect->flags = flags; 160 asect->size = size; 161 asect->vma = vma; 162 asect->filepos = filepos; 163 asect->alignment_power = 4; 164 165 return asect; 166 } 167 168 static const bfd_target * 169 irix_core_core_file_p (bfd *abfd) 170 { 171 int val; 172 struct coreout coreout; 173 struct idesc *idg, *idf, *ids; 174 bfd_size_type amt; 175 176 val = bfd_bread ((PTR) &coreout, (bfd_size_type) sizeof coreout, abfd); 177 if (val != sizeof coreout) 178 { 179 if (bfd_get_error () != bfd_error_system_call) 180 bfd_set_error (bfd_error_wrong_format); 181 return 0; 182 } 183 184 if (coreout.c_version != CORE_VERSION1) 185 return 0; 186 187 /* Have we got a corefile? */ 188 switch (coreout.c_magic) 189 { 190 case CORE_MAGIC: break; 191 #ifdef CORE_MAGIC64 192 case CORE_MAGIC64: break; 193 #endif 194 #ifdef CORE_MAGICN32 195 case CORE_MAGICN32: break; 196 #endif 197 default: return 0; /* Un-identifiable or not corefile. */ 198 } 199 200 amt = sizeof (struct sgi_core_struct); 201 core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, amt); 202 if (!core_hdr (abfd)) 203 return NULL; 204 205 strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE); 206 core_signal (abfd) = coreout.c_sigcause; 207 208 if (bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET) != 0) 209 goto fail; 210 211 /* Process corefile sections. */ 212 #ifdef CORE_MAGIC64 213 if (coreout.c_magic == (int) CORE_MAGIC64) 214 { 215 if (! do_sections64 (abfd, & coreout)) 216 goto fail; 217 } 218 else 219 #endif 220 if (! do_sections (abfd, & coreout)) 221 goto fail; 222 223 /* Make sure that the regs are contiguous within the core file. */ 224 225 idg = &coreout.c_idesc[I_GPREGS]; 226 idf = &coreout.c_idesc[I_FPREGS]; 227 ids = &coreout.c_idesc[I_SPECREGS]; 228 229 if (idg->i_offset + idg->i_len != idf->i_offset 230 || idf->i_offset + idf->i_len != ids->i_offset) 231 goto fail; /* Can't deal with non-contig regs */ 232 233 if (bfd_seek (abfd, idg->i_offset, SEEK_SET) != 0) 234 goto fail; 235 236 if (!make_bfd_asection (abfd, ".reg", 237 SEC_HAS_CONTENTS, 238 idg->i_len + idf->i_len + ids->i_len, 239 0, 240 idg->i_offset)) 241 goto fail; 242 243 /* OK, we believe you. You're a core file (sure, sure). */ 244 bfd_default_set_arch_mach (abfd, bfd_arch_mips, 0); 245 246 return abfd->xvec; 247 248 fail: 249 bfd_release (abfd, core_hdr (abfd)); 250 core_hdr (abfd) = NULL; 251 bfd_section_list_clear (abfd); 252 return NULL; 253 } 254 255 static char * 256 irix_core_core_file_failing_command (bfd *abfd) 257 { 258 return core_command (abfd); 259 } 260 261 static int 262 irix_core_core_file_failing_signal (bfd *abfd) 263 { 264 return core_signal (abfd); 265 } 266 267 /* If somebody calls any byte-swapping routines, shoot them. */ 268 static void 269 swap_abort(void) 270 { 271 abort(); /* This way doesn't require any declaration for ANSI to fuck up */ 272 } 273 274 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort) 275 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort) 276 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort) 277 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort) 278 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort) 279 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort) 280 281 const bfd_target irix_core_vec = 282 { 283 "irix-core", 284 bfd_target_unknown_flavour, 285 BFD_ENDIAN_BIG, /* target byte order */ 286 BFD_ENDIAN_BIG, /* target headers byte order */ 287 (HAS_RELOC | EXEC_P | /* object flags */ 288 HAS_LINENO | HAS_DEBUG | 289 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), 290 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ 291 0, /* symbol prefix */ 292 ' ', /* ar_pad_char */ 293 16, /* ar_max_namelen */ 294 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */ 295 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */ 296 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */ 297 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */ 298 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */ 299 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */ 300 301 { /* bfd_check_format */ 302 _bfd_dummy_target, /* unknown format */ 303 _bfd_dummy_target, /* object file */ 304 _bfd_dummy_target, /* archive */ 305 irix_core_core_file_p /* a core file */ 306 }, 307 { /* bfd_set_format */ 308 bfd_false, bfd_false, 309 bfd_false, bfd_false 310 }, 311 { /* bfd_write_contents */ 312 bfd_false, bfd_false, 313 bfd_false, bfd_false 314 }, 315 316 BFD_JUMP_TABLE_GENERIC (_bfd_generic), 317 BFD_JUMP_TABLE_COPY (_bfd_generic), 318 BFD_JUMP_TABLE_CORE (irix_core), 319 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), 320 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), 321 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), 322 BFD_JUMP_TABLE_WRITE (_bfd_generic), 323 BFD_JUMP_TABLE_LINK (_bfd_nolink), 324 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 325 326 NULL, 327 328 (PTR) 0 /* backend_data */ 329 }; 330 331 #endif /* IRIX_CORE */ 332