1/* BFD back-end for HP/UX core files. 2 Copyright 1993, 1994, 1996, 1998, 1999, 2001, 2002, 2003, 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 7This file is part of BFD, the Binary File Descriptor library. 8 9This program is free software; you can redistribute it and/or modify 10it under the terms of the GNU General Public License as published by 11the Free Software Foundation; either version 2 of the License, or 12(at your option) any later version. 13 14This program is distributed in the hope that it will be useful, 15but WITHOUT ANY WARRANTY; without even the implied warranty of 16MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17GNU General Public License for more details. 18 19You should have received a copy of the GNU General Public License 20along with this program; if not, write to the Free Software 21Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 22 23/* This file can only be compiled on systems which use HP/UX style 24 core files. */ 25 26#include "bfd.h" 27#include "sysdep.h" 28#include "libbfd.h" 29 30#if defined (HOST_HPPAHPUX) || defined (HOST_HP300HPUX) || defined (HOST_HPPAMPEIX) 31 32/* FIXME: sys/core.h doesn't exist for HPUX version 7. HPUX version 33 5, 6, and 7 core files seem to be standard trad-core.c type core 34 files; can we just use trad-core.c in addition to this file? */ 35 36#include <sys/core.h> 37#include <sys/utsname.h> 38 39#endif /* HOST_HPPAHPUX */ 40 41#ifdef HOST_HPPABSD 42 43/* Not a very swift place to put it, but that's where the BSD port 44 puts them. */ 45#include "/hpux/usr/include/sys/core.h" 46 47#endif /* HOST_HPPABSD */ 48 49#include <sys/param.h> 50#ifdef HAVE_DIRENT_H 51# include <dirent.h> 52#else 53# ifdef HAVE_SYS_NDIR_H 54# include <sys/ndir.h> 55# endif 56# ifdef HAVE_SYS_DIR_H 57# include <sys/dir.h> 58# endif 59# ifdef HAVE_NDIR_H 60# include <ndir.h> 61# endif 62#endif 63#include <signal.h> 64#include <machine/reg.h> 65#include <sys/user.h> /* After a.out.h */ 66#include <sys/file.h> 67 68/* Kludge: There's no explicit mechanism provided by sys/core.h to 69 conditionally know whether a proc_info has thread id fields. 70 However, CORE_ANON_SHMEM shows up first at 10.30, which is 71 happily also when meaningful thread id's show up in proc_info. */ 72#if defined(CORE_ANON_SHMEM) 73#define PROC_INFO_HAS_THREAD_ID (1) 74#endif 75 76/* This type appears at HP-UX 10.30. Defining it if not defined 77 by sys/core.h allows us to build for older HP-UX's, and (since 78 it won't be encountered in core-dumps from older HP-UX's) is 79 harmless. */ 80#if !defined(CORE_ANON_SHMEM) 81#define CORE_ANON_SHMEM 0x00000200 /* anonymous shared memory */ 82#endif 83 84/* These are stored in the bfd's tdata */ 85 86/* .lwpid and .user_tid are only valid if PROC_INFO_HAS_THREAD_ID, else they 87 are set to 0. Also, until HP-UX implements MxN threads, .user_tid and 88 .lwpid are synonymous. */ 89struct hpux_core_struct 90{ 91 int sig; 92 int lwpid; /* Kernel thread ID. */ 93 unsigned long user_tid; /* User thread ID. */ 94 char cmd[MAXCOMLEN + 1]; 95}; 96 97#define core_hdr(bfd) ((bfd)->tdata.hpux_core_data) 98#define core_signal(bfd) (core_hdr(bfd)->sig) 99#define core_command(bfd) (core_hdr(bfd)->cmd) 100#define core_kernel_thread_id(bfd) (core_hdr(bfd)->lwpid) 101#define core_user_thread_id(bfd) (core_hdr(bfd)->user_tid) 102 103static asection *make_bfd_asection 104 PARAMS ((bfd *, const char *, flagword, bfd_size_type, bfd_vma, 105 unsigned int)); 106static const bfd_target *hpux_core_core_file_p 107 PARAMS ((bfd *)); 108static char *hpux_core_core_file_failing_command 109 PARAMS ((bfd *)); 110static int hpux_core_core_file_failing_signal 111 PARAMS ((bfd *)); 112static bfd_boolean hpux_core_core_file_matches_executable_p 113 PARAMS ((bfd *, bfd *)); 114static void swap_abort 115 PARAMS ((void)); 116 117static asection * 118make_bfd_asection (abfd, name, flags, size, vma, alignment_power) 119 bfd *abfd; 120 const char *name; 121 flagword flags; 122 bfd_size_type size; 123 bfd_vma vma; 124 unsigned int alignment_power; 125{ 126 asection *asect; 127 char *newname; 128 129 newname = bfd_alloc (abfd, (bfd_size_type) strlen (name) + 1); 130 if (!newname) 131 return NULL; 132 133 strcpy (newname, name); 134 135 asect = bfd_make_section_anyway (abfd, newname); 136 if (!asect) 137 return NULL; 138 139 asect->flags = flags; 140 asect->size = size; 141 asect->vma = vma; 142 asect->filepos = bfd_tell (abfd); 143 asect->alignment_power = alignment_power; 144 145 return asect; 146} 147 148/* Return true if the given core file section corresponds to a thread, 149 based on its name. */ 150 151static int 152thread_section_p (bfd *abfd ATTRIBUTE_UNUSED, 153 asection *sect, 154 void *obj ATTRIBUTE_UNUSED) 155{ 156 return (strncmp (bfd_section_name (abfd, sect), ".reg/", 5) == 0); 157} 158 159/* this function builds a bfd target if the file is a corefile. 160 It returns null or 0 if it finds out thaat it is not a core file. 161 The way it checks this is by looking for allowed 'type' field values. 162 These are declared in sys/core.h 163 There are some values which are 'reserved for future use'. In particular 164 CORE_NONE is actually defined as 0. This may be a catch-all for cases 165 in which the core file is generated by some non-hpux application. 166 (I am just guessing here!) 167*/ 168static const bfd_target * 169hpux_core_core_file_p (abfd) 170 bfd *abfd; 171{ 172 int good_sections = 0; 173 int unknown_sections = 0; 174 175 core_hdr (abfd) = (struct hpux_core_struct *) 176 bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hpux_core_struct)); 177 if (!core_hdr (abfd)) 178 return NULL; 179 180 while (1) 181 { 182 int val; 183 struct corehead core_header; 184 185 val = bfd_bread ((void *) &core_header, 186 (bfd_size_type) sizeof core_header, abfd); 187 if (val <= 0) 188 break; 189 switch (core_header.type) 190 { 191 case CORE_KERNEL: 192 case CORE_FORMAT: 193 /* Just skip this. */ 194 bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR); 195 good_sections++; 196 break; 197 case CORE_EXEC: 198 { 199 struct proc_exec proc_exec; 200 if (bfd_bread ((void *) &proc_exec, (bfd_size_type) core_header.len, 201 abfd) != core_header.len) 202 break; 203 strncpy (core_command (abfd), proc_exec.cmd, MAXCOMLEN + 1); 204 good_sections++; 205 } 206 break; 207 case CORE_PROC: 208 { 209 struct proc_info proc_info; 210 char secname[100]; /* Of arbitrary size, but plenty large. */ 211 212 /* We need to read this section, 'cause we need to determine 213 whether the core-dumped app was threaded before we create 214 any .reg sections. */ 215 if (bfd_bread (&proc_info, (bfd_size_type) core_header.len, abfd) 216 != core_header.len) 217 break; 218 219 /* However, we also want to create those sections with the 220 file positioned at the start of the record, it seems. */ 221 if (bfd_seek (abfd, -((file_ptr) core_header.len), SEEK_CUR) != 0) 222 break; 223 224#if defined(PROC_INFO_HAS_THREAD_ID) 225 core_kernel_thread_id (abfd) = proc_info.lwpid; 226 core_user_thread_id (abfd) = proc_info.user_tid; 227#else 228 core_kernel_thread_id (abfd) = 0; 229 core_user_thread_id (abfd) = 0; 230#endif 231 /* If the program was unthreaded, then we'll just create a 232 .reg section. 233 234 If the program was threaded, then we'll create .reg/XXXXX 235 section for each thread, where XXXXX is a printable 236 representation of the kernel thread id. We'll also 237 create a .reg section for the thread that was running 238 and signalled at the time of the core-dump (i.e., this 239 is effectively an alias, needed to keep GDB happy.) 240 241 Note that we use `.reg/XXXXX' as opposed to '.regXXXXX' 242 because GDB expects that .reg2 will be the floating- 243 point registers. */ 244 if (core_kernel_thread_id (abfd) == 0) 245 { 246 if (!make_bfd_asection (abfd, ".reg", 247 SEC_HAS_CONTENTS, 248 core_header.len, 249 (int) &proc_info - (int) & proc_info.hw_regs, 250 2)) 251 goto fail; 252 } 253 else 254 { 255 /* There are threads. Is this the one that caused the 256 core-dump? We'll claim it was the running thread. */ 257 if (proc_info.sig != -1) 258 { 259 if (!make_bfd_asection (abfd, ".reg", 260 SEC_HAS_CONTENTS, 261 core_header.len, 262 (int) &proc_info - (int) & proc_info.hw_regs, 263 2)) 264 goto fail; 265 } 266 /* We always make one of these sections, for every thread. */ 267 sprintf (secname, ".reg/%d", core_kernel_thread_id (abfd)); 268 if (!make_bfd_asection (abfd, secname, 269 SEC_HAS_CONTENTS, 270 core_header.len, 271 (int) &proc_info - (int) & proc_info.hw_regs, 272 2)) 273 goto fail; 274 } 275 core_signal (abfd) = proc_info.sig; 276 if (bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR) != 0) 277 break; 278 good_sections++; 279 } 280 break; 281 282 case CORE_DATA: 283 case CORE_STACK: 284 case CORE_TEXT: 285 case CORE_MMF: 286 case CORE_SHM: 287 case CORE_ANON_SHMEM: 288 if (!make_bfd_asection (abfd, ".data", 289 SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, 290 core_header.len, 291 (bfd_vma) core_header.addr, 2)) 292 goto fail; 293 294 bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR); 295 good_sections++; 296 break; 297 298 case CORE_NONE: 299 /* Let's not punt if we encounter a section of unknown 300 type. Rather, let's make a note of it. If we later 301 see that there were also "good" sections, then we'll 302 declare that this a core file, but we'll also warn that 303 it may be incompatible with this gdb. 304 */ 305 unknown_sections++; 306 break; 307 308 default: 309 goto fail; /*unrecognized core file type */ 310 } 311 } 312 313 /* OK, we believe you. You're a core file (sure, sure). */ 314 315 /* On HP/UX, we sometimes encounter core files where none of the threads 316 was found to be the running thread (ie the signal was set to -1 for 317 all threads). This happens when the program was aborted externally 318 via a TT_CORE ttrace system call. In that case, we just pick one 319 thread at random to be the active thread. */ 320 if (core_kernel_thread_id (abfd) != 0 321 && bfd_get_section_by_name (abfd, ".reg") == NULL) 322 { 323 asection *asect = bfd_sections_find_if (abfd, thread_section_p, NULL); 324 asection *reg_sect; 325 326 if (asect != NULL) 327 { 328 reg_sect = make_bfd_asection (abfd, ".reg", asect->flags, 329 asect->size, asect->vma, 330 asect->alignment_power); 331 if (reg_sect == NULL) 332 goto fail; 333 334 reg_sect->filepos = asect->filepos; 335 } 336 } 337 338 /* Were there sections of unknown type? If so, yet there were 339 at least some complete sections of known type, then, issue 340 a warning. Possibly the core file was generated on a version 341 of HP-UX that is incompatible with that for which this gdb was 342 built. 343 */ 344 if ((unknown_sections > 0) && (good_sections > 0)) 345 (*_bfd_error_handler) 346 ("%s appears to be a core file,\nbut contains unknown sections. It may have been created on an incompatible\nversion of HP-UX. As a result, some information may be unavailable.\n", 347 abfd->filename); 348 349 return abfd->xvec; 350 351 fail: 352 bfd_release (abfd, core_hdr (abfd)); 353 core_hdr (abfd) = NULL; 354 bfd_section_list_clear (abfd); 355 return NULL; 356} 357 358static char * 359hpux_core_core_file_failing_command (abfd) 360 bfd *abfd; 361{ 362 return core_command (abfd); 363} 364 365static int 366hpux_core_core_file_failing_signal (abfd) 367 bfd *abfd; 368{ 369 return core_signal (abfd); 370} 371 372static bfd_boolean 373hpux_core_core_file_matches_executable_p (core_bfd, exec_bfd) 374 bfd *core_bfd ATTRIBUTE_UNUSED; 375 bfd *exec_bfd ATTRIBUTE_UNUSED; 376{ 377 return TRUE; /* FIXME, We have no way of telling at this point */ 378} 379 380/* If somebody calls any byte-swapping routines, shoot them. */ 381static void 382swap_abort () 383{ 384 abort(); /* This way doesn't require any declaration for ANSI to fuck up */ 385} 386 387#define NO_GET ((bfd_vma (*) (const void *)) swap_abort) 388#define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort) 389#define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort) 390#define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort) 391#define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort) 392#define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort) 393 394const bfd_target hpux_core_vec = 395 { 396 "hpux-core", 397 bfd_target_unknown_flavour, 398 BFD_ENDIAN_BIG, /* target byte order */ 399 BFD_ENDIAN_BIG, /* target headers byte order */ 400 (HAS_RELOC | EXEC_P | /* object flags */ 401 HAS_LINENO | HAS_DEBUG | 402 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), 403 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ 404 0, /* symbol prefix */ 405 ' ', /* ar_pad_char */ 406 16, /* ar_max_namelen */ 407 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */ 408 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */ 409 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */ 410 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */ 411 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */ 412 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */ 413 414 { /* bfd_check_format */ 415 _bfd_dummy_target, /* unknown format */ 416 _bfd_dummy_target, /* object file */ 417 _bfd_dummy_target, /* archive */ 418 hpux_core_core_file_p /* a core file */ 419 }, 420 { /* bfd_set_format */ 421 bfd_false, bfd_false, 422 bfd_false, bfd_false 423 }, 424 { /* bfd_write_contents */ 425 bfd_false, bfd_false, 426 bfd_false, bfd_false 427 }, 428 429 BFD_JUMP_TABLE_GENERIC (_bfd_generic), 430 BFD_JUMP_TABLE_COPY (_bfd_generic), 431 BFD_JUMP_TABLE_CORE (hpux_core), 432 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), 433 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), 434 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), 435 BFD_JUMP_TABLE_WRITE (_bfd_generic), 436 BFD_JUMP_TABLE_LINK (_bfd_nolink), 437 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 438 439 NULL, 440 441 (PTR) 0 /* backend_data */ 442 }; 443