1 /* IBM RS/6000 "XCOFF" back-end for BFD. 2 Copyright 2001, 2002, 2003, 2004, 2005 3 Free Software Foundation, Inc. 4 Written by Tom Rix 5 Contributed by Red Hat Inc. 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, 22 MA 02110-1301, USA. */ 23 24 #include "bfd.h" 25 26 const bfd_target *xcoff64_core_p (bfd *); 27 bfd_boolean xcoff64_core_file_matches_executable_p (bfd *, bfd *); 28 char *xcoff64_core_file_failing_command (bfd *); 29 int xcoff64_core_file_failing_signal (bfd *); 30 31 #ifdef AIX_5_CORE 32 33 #include "sysdep.h" 34 #include "libbfd.h" 35 36 /* Aix 5.1 system include file. */ 37 38 /* Need to define this macro so struct ld_info64 get included. */ 39 #define __LDINFO_PTRACE64__ 40 #include <sys/ldr.h> 41 #include <core.h> 42 43 #define core_hdr(abfd) ((struct core_dumpxx *) abfd->tdata.any) 44 45 #define CHECK_FILE_OFFSET(s, v) \ 46 ((bfd_signed_vma)(v) < 0 || (bfd_signed_vma)(v) > (bfd_signed_vma)(s).st_size) 47 48 const bfd_target * 49 xcoff64_core_p (bfd *abfd) 50 { 51 struct core_dumpxx core, *new_core_hdr; 52 struct stat statbuf; 53 asection *sec; 54 struct __ld_info64 ldinfo; 55 bfd_vma ld_offset; 56 bfd_size_type i; 57 struct vm_infox vminfo; 58 const bfd_target *return_value = NULL; 59 60 /* Get the header. */ 61 if (bfd_seek (abfd, 0, SEEK_SET) != 0) 62 goto xcoff64_core_p_error; 63 64 if (sizeof (struct core_dumpxx) 65 != bfd_bread (&core, sizeof (struct core_dumpxx), abfd)) 66 goto xcoff64_core_p_error; 67 68 if (bfd_stat (abfd, &statbuf) < 0) 69 goto xcoff64_core_p_error; 70 71 /* Sanity checks 72 c_flag has CORE_VERSION_1, Aix 4+ 73 c_entries = 0 for Aix 4.3+ 74 IS_PROC64 is a macro defined in procinfo.h, test for 64 bit process. 75 76 We will still be confused if a Aix 4.3 64 bit core file is 77 copied over to a Aix 5 machine. 78 79 Check file header offsets 80 81 See rs6000-core.c for comment on size of core 82 If there isn't enough of a real core file, bail. */ 83 84 if ((CORE_VERSION_1 != (core.c_flag & CORE_VERSION_1)) 85 || (0 != core.c_entries) 86 || (! (IS_PROC64 (&core.c_u.U_proc))) 87 || ((CHECK_FILE_OFFSET (statbuf, core.c_fdsinfox))) 88 || ((CHECK_FILE_OFFSET (statbuf, core.c_loader))) 89 || ((CHECK_FILE_OFFSET (statbuf, core.c_loader + core.c_lsize))) 90 || ((CHECK_FILE_OFFSET (statbuf, core.c_thr))) 91 || ((CHECK_FILE_OFFSET (statbuf, core.c_segregion))) 92 || ((CHECK_FILE_OFFSET (statbuf, core.c_stack))) 93 || ((CHECK_FILE_OFFSET (statbuf, core.c_stack + core.c_size))) 94 || ((CHECK_FILE_OFFSET (statbuf, core.c_data))) 95 || ((CHECK_FILE_OFFSET (statbuf, core.c_data + core.c_datasize))) 96 || (! (core.c_flag & UBLOCK_VALID)) 97 || (! (core.c_flag & LE_VALID))) 98 goto xcoff64_core_p_error; 99 100 /* Check for truncated stack or general truncating. */ 101 if ((! (core.c_flag & USTACK_VALID)) 102 || (core.c_flag & CORE_TRUNC)) 103 { 104 bfd_set_error (bfd_error_file_truncated); 105 106 return return_value; 107 } 108 109 new_core_hdr = bfd_zalloc (abfd, sizeof (struct core_dumpxx)); 110 if (NULL == new_core_hdr) 111 return return_value; 112 113 memcpy (new_core_hdr, &core, sizeof (struct core_dumpxx)); 114 /* The core_hdr() macro is no longer used here because it would 115 expand to code relying on gcc's cast-as-lvalue extension, 116 which was removed in gcc 4.0. */ 117 abfd->tdata.any = new_core_hdr; 118 119 /* .stack section. */ 120 sec = bfd_make_section_anyway (abfd, ".stack"); 121 if (NULL == sec) 122 return return_value; 123 124 sec->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; 125 sec->size = core.c_size; 126 sec->vma = core.c_stackorg; 127 sec->filepos = core.c_stack; 128 129 /* .reg section for all registers. */ 130 sec = bfd_make_section_anyway (abfd, ".reg"); 131 if (NULL == sec) 132 return return_value; 133 134 sec->flags = SEC_HAS_CONTENTS | SEC_IN_MEMORY; 135 sec->size = sizeof (struct __context64); 136 sec->vma = 0; 137 sec->filepos = 0; 138 sec->contents = (bfd_byte *)&new_core_hdr->c_flt.r64; 139 140 /* .ldinfo section. 141 To actually find out how long this section is in this particular 142 core dump would require going down the whole list of struct 143 ld_info's. See if we can just fake it. */ 144 sec = bfd_make_section_anyway (abfd, ".ldinfo"); 145 if (NULL == sec) 146 return return_value; 147 148 sec->flags = SEC_HAS_CONTENTS; 149 sec->size = core.c_lsize; 150 sec->vma = 0; 151 sec->filepos = core.c_loader; 152 153 /* AIX 4 adds data sections from loaded objects to the core file, 154 which can be found by examining ldinfo, and anonymously mmapped 155 regions. */ 156 157 /* .data section from executable. */ 158 sec = bfd_make_section_anyway (abfd, ".data"); 159 if (NULL == sec) 160 return return_value; 161 162 sec->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; 163 sec->size = core.c_datasize; 164 sec->vma = core.c_dataorg; 165 sec->filepos = core.c_data; 166 167 /* .data sections from loaded objects. */ 168 ld_offset = core.c_loader; 169 170 while (1) 171 { 172 if (bfd_seek (abfd, ld_offset, SEEK_SET) != 0) 173 return return_value; 174 175 if (sizeof (struct __ld_info64) != 176 bfd_bread (&ldinfo, sizeof (struct __ld_info64), abfd)) 177 return return_value; 178 179 if (ldinfo.ldinfo_core) 180 { 181 sec = bfd_make_section_anyway (abfd, ".data"); 182 if (NULL == sec) 183 return return_value; 184 185 sec->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; 186 sec->size = ldinfo.ldinfo_datasize; 187 sec->vma = ldinfo.ldinfo_dataorg; 188 sec->filepos = ldinfo.ldinfo_core; 189 } 190 191 if (0 == ldinfo.ldinfo_next) 192 break; 193 ld_offset += ldinfo.ldinfo_next; 194 } 195 196 /* .vmdata sections from anonymously mmapped regions. */ 197 if (core.c_vmregions) 198 { 199 if (bfd_seek (abfd, core.c_vmm, SEEK_SET) != 0) 200 return return_value; 201 202 for (i = 0; i < core.c_vmregions; i++) 203 if (sizeof (struct vm_infox) != 204 bfd_bread (&vminfo, sizeof (struct vm_infox), abfd)) 205 return return_value; 206 207 if (vminfo.vminfo_offset) 208 { 209 sec = bfd_make_section_anyway (abfd, ".vmdata"); 210 if (NULL == sec) 211 return return_value; 212 213 sec->flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; 214 sec->size = vminfo.vminfo_size; 215 sec->vma = vminfo.vminfo_addr; 216 sec->filepos = vminfo.vminfo_offset; 217 } 218 } 219 220 return_value = (bfd_target *) abfd->xvec; /* This is garbage for now. */ 221 222 xcoff64_core_p_error: 223 if (bfd_get_error () != bfd_error_system_call) 224 bfd_set_error (bfd_error_wrong_format); 225 226 return return_value; 227 } 228 229 /* Return `TRUE' if given core is from the given executable. */ 230 231 bfd_boolean 232 xcoff64_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd) 233 { 234 struct core_dumpxx core; 235 char *path, *s; 236 size_t alloc; 237 const char *str1, *str2; 238 bfd_boolean return_value = FALSE; 239 240 /* Get the header. */ 241 if (bfd_seek (core_bfd, 0, SEEK_SET) != 0) 242 return return_value; 243 244 if (sizeof (struct core_dumpxx) != 245 bfd_bread (&core, sizeof (struct core_dumpxx), core_bfd)) 246 return return_value; 247 248 if (bfd_seek (core_bfd, core.c_loader, SEEK_SET) != 0) 249 return return_value; 250 251 alloc = 100; 252 path = bfd_malloc (alloc); 253 if (path == NULL) 254 return return_value; 255 256 s = path; 257 258 while (1) 259 { 260 if (bfd_bread (s, 1, core_bfd) != 1) 261 goto xcoff64_core_file_matches_executable_p_end_1; 262 263 if (*s == '\0') 264 break; 265 ++s; 266 if (s == path + alloc) 267 { 268 char *n; 269 270 alloc *= 2; 271 n = bfd_realloc (path, alloc); 272 if (n == NULL) 273 goto xcoff64_core_file_matches_executable_p_end_1; 274 275 s = n + (path - s); 276 path = n; 277 } 278 } 279 280 str1 = strrchr (path, '/'); 281 str2 = strrchr (exec_bfd->filename, '/'); 282 283 /* Step over character '/'. */ 284 str1 = str1 != NULL ? str1 + 1 : path; 285 str2 = str2 != NULL ? str2 + 1 : exec_bfd->filename; 286 287 if (strcmp (str1, str2) == 0) 288 return_value = TRUE; 289 290 xcoff64_core_file_matches_executable_p_end_1: 291 free (path); 292 return return_value; 293 } 294 295 char * 296 xcoff64_core_file_failing_command (bfd *abfd) 297 { 298 struct core_dumpxx *c = core_hdr (abfd); 299 char *return_value = 0; 300 301 if (NULL != c) 302 return_value = c->c_u.U_proc.pi_comm; 303 304 return return_value; 305 } 306 307 int 308 xcoff64_core_file_failing_signal (bfd *abfd) 309 { 310 struct core_dumpxx *c = core_hdr (abfd); 311 int return_value = 0; 312 313 if (NULL != c) 314 return_value = c->c_signo; 315 316 return return_value; 317 } 318 319 #else /* AIX_5_CORE */ 320 321 const bfd_target * 322 xcoff64_core_p (bfd *abfd ATTRIBUTE_UNUSED) 323 { 324 bfd_set_error (bfd_error_wrong_format); 325 return 0; 326 } 327 328 bfd_boolean 329 xcoff64_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd) 330 { 331 return generic_core_file_matches_executable_p (core_bfd, exec_bfd); 332 } 333 334 char * 335 xcoff64_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED) 336 { 337 return 0; 338 } 339 340 int 341 xcoff64_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED) 342 { 343 return 0; 344 } 345 346 #endif /* AIX_5_CORE */ 347