1 /* IBM RS/6000 "XCOFF" back-end for BFD. 2 Copyright 2001, 2002 3 Free Software Foundation, Inc. 4 Written by Tom Rix 5 Contributed by Redhat. 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, 22 MA 02111-1307, USA. */ 23 24 #include "bfd.h" 25 26 #ifdef AIX_5_CORE 27 28 #include "sysdep.h" 29 #include "libbfd.h" 30 31 const bfd_target *xcoff64_core_p 32 PARAMS ((bfd *)); 33 bfd_boolean xcoff64_core_file_matches_executable_p 34 PARAMS ((bfd *, bfd *)); 35 char *xcoff64_core_file_failing_command 36 PARAMS ((bfd *)); 37 int xcoff64_core_file_failing_signal 38 PARAMS ((bfd *)); 39 40 /* Aix 5.1 system include file. */ 41 42 /* Need to define this macro so struct ld_info64 get included. */ 43 #define __LDINFO_PTRACE64__ 44 #include <sys/ldr.h> 45 #include <core.h> 46 47 #define core_hdr(abfd) ((struct core_dumpxx *) abfd->tdata.any) 48 49 #define CHECK_FILE_OFFSET(s, v) \ 50 ((bfd_signed_vma)(v) < 0 || (bfd_signed_vma)(v) > (bfd_signed_vma)(s).st_size) 51 52 const bfd_target * 53 xcoff64_core_p (abfd) 54 bfd *abfd; 55 { 56 struct core_dumpxx core, *new_core_hdr; 57 struct stat statbuf; 58 asection *sec; 59 struct __ld_info64 ldinfo; 60 bfd_vma ld_offset; 61 bfd_size_type i; 62 struct vm_infox vminfo; 63 bfd_target *return_value = NULL; 64 65 /* Get the header. */ 66 if (bfd_seek (abfd, 0, SEEK_SET) != 0) 67 goto xcoff64_core_p_error; 68 69 if (sizeof (struct core_dumpxx) 70 != bfd_bread (&core, sizeof (struct core_dumpxx), abfd)) 71 goto xcoff64_core_p_error; 72 73 if (bfd_stat (abfd, &statbuf) < 0) 74 goto xcoff64_core_p_error; 75 76 /* Sanity checks 77 c_flag has CORE_VERSION_1, Aix 4+ 78 c_entries = 0 for Aix 4.3+ 79 IS_PROC64 is a macro defined in procinfo.h, test for 64 bit process. 80 81 We will still be confused if a Aix 4.3 64 bit core file is 82 copied over to a Aix 5 machine. 83 84 Check file header offsets 85 86 See rs6000-core.c for comment on size of core 87 If there isn't enough of a real core file, bail. */ 88 89 if ((CORE_VERSION_1 != (core.c_flag & CORE_VERSION_1)) 90 || (0 != core.c_entries) 91 || (! (IS_PROC64 (&core.c_u.U_proc))) 92 || ((CHECK_FILE_OFFSET (statbuf, core.c_fdsinfox))) 93 || ((CHECK_FILE_OFFSET (statbuf, core.c_loader))) 94 || ((CHECK_FILE_OFFSET (statbuf, core.c_loader + core.c_lsize))) 95 || ((CHECK_FILE_OFFSET (statbuf, core.c_thr))) 96 || ((CHECK_FILE_OFFSET (statbuf, core.c_segregion))) 97 || ((CHECK_FILE_OFFSET (statbuf, core.c_stack))) 98 || ((CHECK_FILE_OFFSET (statbuf, core.c_stack + core.c_size))) 99 || ((CHECK_FILE_OFFSET (statbuf, core.c_data))) 100 || ((CHECK_FILE_OFFSET (statbuf, core.c_data + core.c_datasize))) 101 || (! (core.c_flag & UBLOCK_VALID)) 102 || (! (core.c_flag & LE_VALID))) 103 goto xcoff64_core_p_error; 104 105 /* Check for truncated stack or general truncating. */ 106 if ((! (core.c_flag & USTACK_VALID)) 107 || (core.c_flag & CORE_TRUNC)) 108 { 109 bfd_set_error (bfd_error_file_truncated); 110 111 return return_value; 112 } 113 114 new_core_hdr = (struct core_dumpxx *) 115 bfd_zalloc (abfd, sizeof (struct core_dumpxx)); 116 if (NULL == new_core_hdr) 117 return return_value; 118 119 memcpy (new_core_hdr, &core, sizeof (struct core_dumpxx)); 120 core_hdr(abfd) = (char *)new_core_hdr; 121 122 /* .stack section. */ 123 sec = bfd_make_section_anyway (abfd, ".stack"); 124 if (NULL == sec) 125 return return_value; 126 127 sec->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; 128 sec->_raw_size = core.c_size; 129 sec->vma = core.c_stackorg; 130 sec->filepos = core.c_stack; 131 132 /* .reg section for all registers. */ 133 sec = bfd_make_section_anyway (abfd, ".reg"); 134 if (NULL == sec) 135 return return_value; 136 137 sec->flags = SEC_HAS_CONTENTS | SEC_IN_MEMORY; 138 sec->_raw_size = sizeof (struct __context64); 139 sec->vma = 0; 140 sec->filepos = 0; 141 sec->contents = (bfd_byte *)&new_core_hdr->c_flt.r64; 142 143 /* .ldinfo section. 144 To actually find out how long this section is in this particular 145 core dump would require going down the whole list of struct 146 ld_info's. See if we can just fake it. */ 147 sec = bfd_make_section_anyway (abfd, ".ldinfo"); 148 if (NULL == sec) 149 return return_value; 150 151 sec->flags = SEC_HAS_CONTENTS; 152 sec->_raw_size = core.c_lsize; 153 sec->vma = 0; 154 sec->filepos = core.c_loader; 155 156 /* AIX 4 adds data sections from loaded objects to the core file, 157 which can be found by examining ldinfo, and anonymously mmapped 158 regions. */ 159 160 /* .data section from executable. */ 161 sec = bfd_make_section_anyway (abfd, ".data"); 162 if (NULL == sec) 163 return return_value; 164 165 sec->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; 166 sec->_raw_size = core.c_datasize; 167 sec->vma = core.c_dataorg; 168 sec->filepos = core.c_data; 169 170 /* .data sections from loaded objects. */ 171 ld_offset = core.c_loader; 172 173 while (1) 174 { 175 if (bfd_seek (abfd, ld_offset, SEEK_SET) != 0) 176 return return_value; 177 178 if (sizeof (struct __ld_info64) != 179 bfd_bread (&ldinfo, sizeof (struct __ld_info64), abfd)) 180 return return_value; 181 182 if (ldinfo.ldinfo_core) 183 { 184 sec = bfd_make_section_anyway (abfd, ".data"); 185 if (NULL == sec) 186 return return_value; 187 188 sec->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; 189 sec->_raw_size = ldinfo.ldinfo_datasize; 190 sec->vma = ldinfo.ldinfo_dataorg; 191 sec->filepos = ldinfo.ldinfo_core; 192 } 193 194 if (0 == ldinfo.ldinfo_next) 195 break; 196 ld_offset += ldinfo.ldinfo_next; 197 } 198 199 /* .vmdata sections from anonymously mmapped regions. */ 200 if (core.c_vmregions) 201 { 202 if (bfd_seek (abfd, core.c_vmm, SEEK_SET) != 0) 203 return return_value; 204 205 for (i = 0; i < core.c_vmregions; i++) 206 if (sizeof (struct vm_infox) != 207 bfd_bread (&vminfo, sizeof (struct vm_infox), abfd)) 208 return return_value; 209 210 if (vminfo.vminfo_offset) 211 { 212 sec = bfd_make_section_anyway (abfd, ".vmdata"); 213 if (NULL == sec) 214 return return_value; 215 216 sec->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; 217 sec->_raw_size = vminfo.vminfo_size; 218 sec->vma = vminfo.vminfo_addr; 219 sec->filepos = vminfo.vminfo_offset; 220 } 221 } 222 223 return_value = abfd->xvec; /* This is garbage for now. */ 224 225 xcoff64_core_p_error: 226 if (bfd_get_error () != bfd_error_system_call) 227 bfd_set_error (bfd_error_wrong_format); 228 229 return return_value; 230 } 231 232 /* Return `TRUE' if given core is from the given executable. */ 233 234 bfd_boolean 235 xcoff64_core_file_matches_executable_p (core_bfd, exec_bfd) 236 bfd *core_bfd; 237 bfd *exec_bfd; 238 { 239 struct core_dumpxx core; 240 char *path, *s; 241 size_t alloc; 242 const char *str1, *str2; 243 bfd_boolean return_value = FALSE; 244 245 /* Get the header. */ 246 if (bfd_seek (core_bfd, 0, SEEK_SET) != 0) 247 return return_value; 248 249 if (sizeof (struct core_dumpxx) != 250 bfd_bread (&core, sizeof (struct core_dumpxx), core_bfd)) 251 return return_value; 252 253 if (bfd_seek (core_bfd, core.c_loader, SEEK_SET) != 0) 254 return return_value; 255 256 alloc = 100; 257 path = bfd_malloc (alloc); 258 if (path == NULL) 259 return return_value; 260 261 s = path; 262 263 while (1) 264 { 265 if (bfd_bread (s, 1, core_bfd) != 1) 266 goto xcoff64_core_file_matches_executable_p_end_1; 267 268 if (*s == '\0') 269 break; 270 ++s; 271 if (s == path + alloc) 272 { 273 char *n; 274 275 alloc *= 2; 276 n = bfd_realloc (path, alloc); 277 if (n == NULL) 278 goto xcoff64_core_file_matches_executable_p_end_1; 279 280 s = n + (path - s); 281 path = n; 282 } 283 } 284 285 str1 = strrchr (path, '/'); 286 str2 = strrchr (exec_bfd->filename, '/'); 287 288 /* Step over character '/'. */ 289 str1 = str1 != NULL ? str1 + 1 : path; 290 str2 = str2 != NULL ? str2 + 1 : exec_bfd->filename; 291 292 if (strcmp (str1, str2) == 0) 293 return_value = TRUE; 294 295 xcoff64_core_file_matches_executable_p_end_1: 296 free (path); 297 return return_value; 298 } 299 300 char * 301 xcoff64_core_file_failing_command (abfd) 302 bfd *abfd; 303 { 304 struct core_dumpxx *c = core_hdr (abfd); 305 char *return_value = 0; 306 307 if (NULL != c) 308 return_value = c->c_u.U_proc.pi_comm; 309 310 return return_value; 311 } 312 313 int 314 xcoff64_core_file_failing_signal (abfd) 315 bfd *abfd; 316 { 317 struct core_dumpxx *c = core_hdr (abfd); 318 int return_value = 0; 319 320 if (NULL != c) 321 return_value = c->c_signo; 322 323 return return_value; 324 } 325 326 #else /* AIX_5_CORE */ 327 328 const bfd_target *xcoff64_core_p 329 PARAMS ((bfd *)); 330 bfd_boolean xcoff64_core_file_matches_executable_p 331 PARAMS ((bfd *, bfd *)); 332 char *xcoff64_core_file_failing_command 333 PARAMS ((bfd *)); 334 int xcoff64_core_file_failing_signal 335 PARAMS ((bfd *)); 336 337 const bfd_target * 338 xcoff64_core_p (abfd) 339 bfd *abfd ATTRIBUTE_UNUSED; 340 { 341 bfd_set_error (bfd_error_wrong_format); 342 return 0; 343 } 344 345 bfd_boolean 346 xcoff64_core_file_matches_executable_p (core_bfd, exec_bfd) 347 bfd *core_bfd ATTRIBUTE_UNUSED; 348 bfd *exec_bfd ATTRIBUTE_UNUSED; 349 { 350 return FALSE; 351 } 352 353 char * 354 xcoff64_core_file_failing_command (abfd) 355 bfd *abfd ATTRIBUTE_UNUSED; 356 { 357 return 0; 358 } 359 360 int 361 xcoff64_core_file_failing_signal (abfd) 362 bfd *abfd ATTRIBUTE_UNUSED; 363 { 364 return 0; 365 } 366 367 #endif /* AIX_5_CORE */ 368