1 /* IBM RS/6000 "XCOFF" back-end for BFD. 2 Copyright (C) 2001-2014 Free Software Foundation, Inc. 3 Written by Tom Rix 4 Contributed by Red Hat Inc. 5 6 This file is part of BFD, the Binary File Descriptor library. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 21 MA 02110-1301, USA. */ 22 23 #include "sysdep.h" 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 "libbfd.h" 34 35 /* Aix 5.1 system include file. */ 36 37 /* Need to define this macro so struct ld_info64 get included. */ 38 #define __LDINFO_PTRACE64__ 39 #include <sys/ldr.h> 40 #include <core.h> 41 42 /* The default architecture and machine for matching core files. */ 43 #define DEFAULT_ARCHITECTURE bfd_arch_powerpc 44 #define DEFAULT_MACHINE bfd_mach_ppc_620 45 46 #define core_hdr(abfd) ((struct core_dumpxx *) abfd->tdata.any) 47 48 #define CHECK_FILE_OFFSET(s, v) \ 49 ((bfd_signed_vma)(v) < 0 || (bfd_signed_vma)(v) > (bfd_signed_vma)(s).st_size) 50 51 const bfd_target * 52 xcoff64_core_p (bfd *abfd) 53 { 54 enum bfd_architecture arch; 55 unsigned long mach; 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 const bfd_target *return_value = NULL; 64 flagword flags; 65 66 /* Get the header. */ 67 if (bfd_seek (abfd, 0, SEEK_SET) != 0) 68 goto xcoff64_core_p_error; 69 70 if (sizeof (struct core_dumpxx) 71 != bfd_bread (&core, sizeof (struct core_dumpxx), abfd)) 72 goto xcoff64_core_p_error; 73 74 if (bfd_stat (abfd, &statbuf) < 0) 75 goto xcoff64_core_p_error; 76 77 /* Sanity checks 78 c_flag has CORE_VERSION_1, Aix 4+ 79 c_entries = 0 for Aix 4.3+ 80 IS_PROC64 is a macro defined in procinfo.h, test for 64 bit process. 81 82 We will still be confused if a Aix 4.3 64 bit core file is 83 copied over to a Aix 5 machine. 84 85 Check file header offsets 86 87 See rs6000-core.c for comment on size of core 88 If there isn't enough of a real core file, bail. */ 89 90 if ((CORE_VERSION_1 != (core.c_flag & CORE_VERSION_1)) 91 || (0 != core.c_entries) 92 || (! (IS_PROC64 (&core.c_u.U_proc))) 93 || ((CHECK_FILE_OFFSET (statbuf, core.c_fdsinfox))) 94 || ((CHECK_FILE_OFFSET (statbuf, core.c_loader))) 95 || ((CHECK_FILE_OFFSET (statbuf, core.c_loader + core.c_lsize))) 96 || ((CHECK_FILE_OFFSET (statbuf, core.c_thr))) 97 || ((CHECK_FILE_OFFSET (statbuf, core.c_segregion))) 98 || ((CHECK_FILE_OFFSET (statbuf, core.c_stack))) 99 || ((CHECK_FILE_OFFSET (statbuf, core.c_stack + core.c_size))) 100 || ((CHECK_FILE_OFFSET (statbuf, core.c_data))) 101 || ((CHECK_FILE_OFFSET (statbuf, core.c_data + core.c_datasize))) 102 || (! (core.c_flag & UBLOCK_VALID)) 103 || (! (core.c_flag & LE_VALID))) 104 goto xcoff64_core_p_error; 105 106 /* Check for truncated stack or general truncating. */ 107 if ((! (core.c_flag & USTACK_VALID)) 108 || (core.c_flag & CORE_TRUNC)) 109 { 110 bfd_set_error (bfd_error_file_truncated); 111 112 return return_value; 113 } 114 115 new_core_hdr = 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 /* The core_hdr() macro is no longer used here because it would 121 expand to code relying on gcc's cast-as-lvalue extension, 122 which was removed in gcc 4.0. */ 123 abfd->tdata.any = new_core_hdr; 124 125 /* .stack section. */ 126 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; 127 sec = bfd_make_section_anyway_with_flags (abfd, ".stack", flags); 128 if (NULL == sec) 129 return return_value; 130 131 sec->size = core.c_size; 132 sec->vma = core.c_stackorg; 133 sec->filepos = core.c_stack; 134 135 /* .reg section for all registers. */ 136 flags = SEC_HAS_CONTENTS | SEC_IN_MEMORY; 137 sec = bfd_make_section_anyway_with_flags (abfd, ".reg", flags); 138 if (NULL == sec) 139 return return_value; 140 141 sec->size = sizeof (struct __context64); 142 sec->vma = 0; 143 sec->filepos = 0; 144 sec->contents = (bfd_byte *)&new_core_hdr->c_flt.r64; 145 146 /* .ldinfo section. 147 To actually find out how long this section is in this particular 148 core dump would require going down the whole list of struct 149 ld_info's. See if we can just fake it. */ 150 flags = SEC_HAS_CONTENTS; 151 sec = bfd_make_section_anyway_with_flags (abfd, ".ldinfo", flags); 152 if (NULL == sec) 153 return return_value; 154 155 sec->size = core.c_lsize; 156 sec->vma = 0; 157 sec->filepos = core.c_loader; 158 159 /* AIX 4 adds data sections from loaded objects to the core file, 160 which can be found by examining ldinfo, and anonymously mmapped 161 regions. */ 162 163 /* .data section from executable. */ 164 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; 165 sec = bfd_make_section_anyway_with_flags (abfd, ".data", flags); 166 if (NULL == sec) 167 return return_value; 168 169 sec->size = core.c_datasize; 170 sec->vma = core.c_dataorg; 171 sec->filepos = core.c_data; 172 173 /* .data sections from loaded objects. */ 174 ld_offset = core.c_loader; 175 176 while (1) 177 { 178 if (bfd_seek (abfd, ld_offset, SEEK_SET) != 0) 179 return return_value; 180 181 if (sizeof (struct __ld_info64) != 182 bfd_bread (&ldinfo, sizeof (struct __ld_info64), abfd)) 183 return return_value; 184 185 if (ldinfo.ldinfo_core) 186 { 187 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; 188 sec = bfd_make_section_anyway_with_flags (abfd, ".data", flags); 189 if (NULL == sec) 190 return return_value; 191 192 sec->size = ldinfo.ldinfo_datasize; 193 sec->vma = ldinfo.ldinfo_dataorg; 194 sec->filepos = ldinfo.ldinfo_core; 195 } 196 197 if (0 == ldinfo.ldinfo_next) 198 break; 199 ld_offset += ldinfo.ldinfo_next; 200 } 201 202 /* .vmdata sections from anonymously mmapped regions. */ 203 if (core.c_vmregions) 204 { 205 if (bfd_seek (abfd, core.c_vmm, SEEK_SET) != 0) 206 return return_value; 207 208 for (i = 0; i < core.c_vmregions; i++) 209 if (sizeof (struct vm_infox) != 210 bfd_bread (&vminfo, sizeof (struct vm_infox), abfd)) 211 return return_value; 212 213 if (vminfo.vminfo_offset) 214 { 215 flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS; 216 sec = bfd_make_section_anyway_with_flags (abfd, ".vmdata", flags); 217 if (NULL == sec) 218 return return_value; 219 220 sec->size = vminfo.vminfo_size; 221 sec->vma = vminfo.vminfo_addr; 222 sec->filepos = vminfo.vminfo_offset; 223 } 224 } 225 226 /* Set the architecture and machine. */ 227 arch = DEFAULT_ARCHITECTURE; 228 mach = DEFAULT_MACHINE; 229 bfd_default_set_arch_mach (abfd, arch, mach); 230 231 return_value = (bfd_target *) abfd->xvec; /* This is garbage for now. */ 232 233 xcoff64_core_p_error: 234 if (bfd_get_error () != bfd_error_system_call) 235 bfd_set_error (bfd_error_wrong_format); 236 237 return return_value; 238 } 239 240 /* Return `TRUE' if given core is from the given executable. */ 241 242 bfd_boolean 243 xcoff64_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd) 244 { 245 struct core_dumpxx core; 246 char *path, *s; 247 size_t alloc; 248 const char *str1, *str2; 249 bfd_boolean return_value = FALSE; 250 251 /* Get the header. */ 252 if (bfd_seek (core_bfd, 0, SEEK_SET) != 0) 253 return return_value; 254 255 if (sizeof (struct core_dumpxx) != 256 bfd_bread (&core, sizeof (struct core_dumpxx), core_bfd)) 257 return return_value; 258 259 if (bfd_seek (core_bfd, core.c_loader, SEEK_SET) != 0) 260 return return_value; 261 262 alloc = 100; 263 path = bfd_malloc (alloc); 264 if (path == NULL) 265 return return_value; 266 267 s = path; 268 269 while (1) 270 { 271 if (bfd_bread (s, 1, core_bfd) != 1) 272 goto xcoff64_core_file_matches_executable_p_end_1; 273 274 if (*s == '\0') 275 break; 276 ++s; 277 if (s == path + alloc) 278 { 279 char *n; 280 281 alloc *= 2; 282 n = bfd_realloc (path, alloc); 283 if (n == NULL) 284 goto xcoff64_core_file_matches_executable_p_end_1; 285 286 s = n + (path - s); 287 path = n; 288 } 289 } 290 291 str1 = strrchr (path, '/'); 292 str2 = strrchr (exec_bfd->filename, '/'); 293 294 /* Step over character '/'. */ 295 str1 = str1 != NULL ? str1 + 1 : path; 296 str2 = str2 != NULL ? str2 + 1 : exec_bfd->filename; 297 298 if (strcmp (str1, str2) == 0) 299 return_value = TRUE; 300 301 xcoff64_core_file_matches_executable_p_end_1: 302 free (path); 303 return return_value; 304 } 305 306 char * 307 xcoff64_core_file_failing_command (bfd *abfd) 308 { 309 struct core_dumpxx *c = core_hdr (abfd); 310 char *return_value = 0; 311 312 if (NULL != c) 313 return_value = c->c_u.U_proc.pi_comm; 314 315 return return_value; 316 } 317 318 int 319 xcoff64_core_file_failing_signal (bfd *abfd) 320 { 321 struct core_dumpxx *c = core_hdr (abfd); 322 int return_value = 0; 323 324 if (NULL != c) 325 return_value = c->c_signo; 326 327 return return_value; 328 } 329 330 #else /* AIX_5_CORE */ 331 332 const bfd_target * 333 xcoff64_core_p (bfd *abfd ATTRIBUTE_UNUSED) 334 { 335 bfd_set_error (bfd_error_wrong_format); 336 return 0; 337 } 338 339 bfd_boolean 340 xcoff64_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd) 341 { 342 return generic_core_file_matches_executable_p (core_bfd, exec_bfd); 343 } 344 345 char * 346 xcoff64_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED) 347 { 348 return 0; 349 } 350 351 int 352 xcoff64_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED) 353 { 354 return 0; 355 } 356 357 #endif /* AIX_5_CORE */ 358
