Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* BFD back-end for HP/UX core files. |
edeb6e24 | 2 | Copyright 1993, 1994, 1996, 1998, 1999, 2001, 2002, 2003, 2004 |
7898deda | 3 | Free Software Foundation, Inc. |
252b5132 RH |
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 | |
3e110533 | 21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
252b5132 RH |
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. */ | |
3fde5a36 | 89 | struct hpux_core_struct |
252b5132 RH |
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 | ||
dc810e39 AM |
103 | static asection *make_bfd_asection |
104 | PARAMS ((bfd *, const char *, flagword, bfd_size_type, bfd_vma, | |
105 | unsigned int)); | |
b34976b6 AM |
106 | static const bfd_target *hpux_core_core_file_p |
107 | PARAMS ((bfd *)); | |
108 | static char *hpux_core_core_file_failing_command | |
109 | PARAMS ((bfd *)); | |
110 | static int hpux_core_core_file_failing_signal | |
111 | PARAMS ((bfd *)); | |
112 | static bfd_boolean hpux_core_core_file_matches_executable_p | |
dc810e39 | 113 | PARAMS ((bfd *, bfd *)); |
b34976b6 AM |
114 | static void swap_abort |
115 | PARAMS ((void)); | |
252b5132 RH |
116 | |
117 | static asection * | |
eea6121a | 118 | make_bfd_asection (abfd, name, flags, size, vma, alignment_power) |
252b5132 | 119 | bfd *abfd; |
dc810e39 | 120 | const char *name; |
252b5132 | 121 | flagword flags; |
eea6121a | 122 | bfd_size_type size; |
252b5132 RH |
123 | bfd_vma vma; |
124 | unsigned int alignment_power; | |
125 | { | |
126 | asection *asect; | |
127 | char *newname; | |
128 | ||
dc810e39 | 129 | newname = bfd_alloc (abfd, (bfd_size_type) strlen (name) + 1); |
252b5132 RH |
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; | |
eea6121a | 140 | asect->size = size; |
252b5132 RH |
141 | asect->vma = vma; |
142 | asect->filepos = bfd_tell (abfd); | |
143 | asect->alignment_power = alignment_power; | |
144 | ||
145 | return asect; | |
146 | } | |
147 | ||
94ea025a JB |
148 | /* Return true if the given core file section corresponds to a thread, |
149 | based on its name. */ | |
150 | ||
151 | static int | |
152 | thread_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 | ||
252b5132 RH |
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 | */ | |
168 | static const bfd_target * | |
169 | hpux_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 *) | |
dc810e39 | 176 | bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hpux_core_struct)); |
252b5132 RH |
177 | if (!core_hdr (abfd)) |
178 | return NULL; | |
179 | ||
180 | while (1) | |
181 | { | |
182 | int val; | |
183 | struct corehead core_header; | |
184 | ||
dc810e39 AM |
185 | val = bfd_bread ((void *) &core_header, |
186 | (bfd_size_type) sizeof core_header, abfd); | |
252b5132 RH |
187 | if (val <= 0) |
188 | break; | |
189 | switch (core_header.type) | |
190 | { | |
191 | case CORE_KERNEL: | |
192 | case CORE_FORMAT: | |
dc810e39 AM |
193 | /* Just skip this. */ |
194 | bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR); | |
252b5132 RH |
195 | good_sections++; |
196 | break; | |
197 | case CORE_EXEC: | |
198 | { | |
199 | struct proc_exec proc_exec; | |
dc810e39 AM |
200 | if (bfd_bread ((void *) &proc_exec, (bfd_size_type) core_header.len, |
201 | abfd) != core_header.len) | |
252b5132 RH |
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. */ | |
dc810e39 | 215 | if (bfd_bread (&proc_info, (bfd_size_type) core_header.len, abfd) |
252b5132 RH |
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. */ | |
94ea025a | 221 | if (bfd_seek (abfd, -((file_ptr) core_header.len), SEEK_CUR) != 0) |
252b5132 RH |
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", | |
3dd2fcf0 DA |
247 | SEC_HAS_CONTENTS, |
248 | core_header.len, | |
249 | (bfd_vma) offsetof (struct proc_info, | |
250 | hw_regs), | |
251 | 2)) | |
9e7b37b3 | 252 | goto fail; |
252b5132 RH |
253 | } |
254 | else | |
255 | { | |
256 | /* There are threads. Is this the one that caused the | |
257 | core-dump? We'll claim it was the running thread. */ | |
258 | if (proc_info.sig != -1) | |
259 | { | |
260 | if (!make_bfd_asection (abfd, ".reg", | |
261 | SEC_HAS_CONTENTS, | |
262 | core_header.len, | |
3dd2fcf0 DA |
263 | (bfd_vma)offsetof (struct proc_info, |
264 | hw_regs), | |
252b5132 | 265 | 2)) |
9e7b37b3 | 266 | goto fail; |
252b5132 RH |
267 | } |
268 | /* We always make one of these sections, for every thread. */ | |
269 | sprintf (secname, ".reg/%d", core_kernel_thread_id (abfd)); | |
270 | if (!make_bfd_asection (abfd, secname, | |
3dd2fcf0 DA |
271 | SEC_HAS_CONTENTS, |
272 | core_header.len, | |
273 | (bfd_vma) offsetof (struct proc_info, | |
274 | hw_regs), | |
275 | 2)) | |
9e7b37b3 | 276 | goto fail; |
252b5132 RH |
277 | } |
278 | core_signal (abfd) = proc_info.sig; | |
dc810e39 | 279 | if (bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR) != 0) |
252b5132 RH |
280 | break; |
281 | good_sections++; | |
282 | } | |
283 | break; | |
284 | ||
285 | case CORE_DATA: | |
286 | case CORE_STACK: | |
287 | case CORE_TEXT: | |
288 | case CORE_MMF: | |
289 | case CORE_SHM: | |
290 | case CORE_ANON_SHMEM: | |
291 | if (!make_bfd_asection (abfd, ".data", | |
292 | SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, | |
5198ba8b DA |
293 | core_header.len, |
294 | (bfd_vma) core_header.addr, 2)) | |
9e7b37b3 | 295 | goto fail; |
252b5132 | 296 | |
dc810e39 | 297 | bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR); |
252b5132 RH |
298 | good_sections++; |
299 | break; | |
300 | ||
301 | case CORE_NONE: | |
302 | /* Let's not punt if we encounter a section of unknown | |
303 | type. Rather, let's make a note of it. If we later | |
304 | see that there were also "good" sections, then we'll | |
305 | declare that this a core file, but we'll also warn that | |
306 | it may be incompatible with this gdb. | |
307 | */ | |
308 | unknown_sections++; | |
309 | break; | |
3fde5a36 | 310 | |
9e7b37b3 AM |
311 | default: |
312 | goto fail; /*unrecognized core file type */ | |
252b5132 RH |
313 | } |
314 | } | |
315 | ||
316 | /* OK, we believe you. You're a core file (sure, sure). */ | |
317 | ||
94ea025a JB |
318 | /* On HP/UX, we sometimes encounter core files where none of the threads |
319 | was found to be the running thread (ie the signal was set to -1 for | |
320 | all threads). This happens when the program was aborted externally | |
321 | via a TT_CORE ttrace system call. In that case, we just pick one | |
322 | thread at random to be the active thread. */ | |
323 | if (core_kernel_thread_id (abfd) != 0 | |
324 | && bfd_get_section_by_name (abfd, ".reg") == NULL) | |
325 | { | |
326 | asection *asect = bfd_sections_find_if (abfd, thread_section_p, NULL); | |
327 | asection *reg_sect; | |
328 | ||
329 | if (asect != NULL) | |
330 | { | |
331 | reg_sect = make_bfd_asection (abfd, ".reg", asect->flags, | |
332 | asect->size, asect->vma, | |
333 | asect->alignment_power); | |
334 | if (reg_sect == NULL) | |
335 | goto fail; | |
336 | ||
337 | reg_sect->filepos = asect->filepos; | |
338 | } | |
339 | } | |
340 | ||
252b5132 RH |
341 | /* Were there sections of unknown type? If so, yet there were |
342 | at least some complete sections of known type, then, issue | |
343 | a warning. Possibly the core file was generated on a version | |
344 | of HP-UX that is incompatible with that for which this gdb was | |
345 | built. | |
346 | */ | |
347 | if ((unknown_sections > 0) && (good_sections > 0)) | |
348 | (*_bfd_error_handler) | |
349 | ("%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", | |
350 | abfd->filename); | |
351 | ||
352 | return abfd->xvec; | |
9e7b37b3 AM |
353 | |
354 | fail: | |
355 | bfd_release (abfd, core_hdr (abfd)); | |
356 | core_hdr (abfd) = NULL; | |
357 | bfd_section_list_clear (abfd); | |
358 | return NULL; | |
252b5132 RH |
359 | } |
360 | ||
361 | static char * | |
362 | hpux_core_core_file_failing_command (abfd) | |
363 | bfd *abfd; | |
364 | { | |
365 | return core_command (abfd); | |
366 | } | |
367 | ||
252b5132 RH |
368 | static int |
369 | hpux_core_core_file_failing_signal (abfd) | |
370 | bfd *abfd; | |
371 | { | |
372 | return core_signal (abfd); | |
373 | } | |
374 | ||
b34976b6 | 375 | static bfd_boolean |
252b5132 | 376 | hpux_core_core_file_matches_executable_p (core_bfd, exec_bfd) |
dc810e39 AM |
377 | bfd *core_bfd ATTRIBUTE_UNUSED; |
378 | bfd *exec_bfd ATTRIBUTE_UNUSED; | |
252b5132 | 379 | { |
b34976b6 | 380 | return TRUE; /* FIXME, We have no way of telling at this point */ |
252b5132 RH |
381 | } |
382 | \f | |
252b5132 RH |
383 | /* If somebody calls any byte-swapping routines, shoot them. */ |
384 | static void | |
dc810e39 | 385 | swap_abort () |
252b5132 RH |
386 | { |
387 | abort(); /* This way doesn't require any declaration for ANSI to fuck up */ | |
388 | } | |
8ce8c090 | 389 | |
edeb6e24 AM |
390 | #define NO_GET ((bfd_vma (*) (const void *)) swap_abort) |
391 | #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort) | |
392 | #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort) | |
8ce8c090 AM |
393 | #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort) |
394 | #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort) | |
395 | #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort) | |
252b5132 RH |
396 | |
397 | const bfd_target hpux_core_vec = | |
398 | { | |
399 | "hpux-core", | |
400 | bfd_target_unknown_flavour, | |
401 | BFD_ENDIAN_BIG, /* target byte order */ | |
402 | BFD_ENDIAN_BIG, /* target headers byte order */ | |
403 | (HAS_RELOC | EXEC_P | /* object flags */ | |
404 | HAS_LINENO | HAS_DEBUG | | |
405 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
406 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
407 | 0, /* symbol prefix */ | |
408 | ' ', /* ar_pad_char */ | |
409 | 16, /* ar_max_namelen */ | |
8ce8c090 | 410 | NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */ |
edeb6e24 AM |
411 | NO_GET, NO_GETS, NO_PUT, /* 32 bit data */ |
412 | NO_GET, NO_GETS, NO_PUT, /* 16 bit data */ | |
8ce8c090 | 413 | NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */ |
edeb6e24 AM |
414 | NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */ |
415 | NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */ | |
252b5132 RH |
416 | |
417 | { /* bfd_check_format */ | |
8ce8c090 AM |
418 | _bfd_dummy_target, /* unknown format */ |
419 | _bfd_dummy_target, /* object file */ | |
420 | _bfd_dummy_target, /* archive */ | |
421 | hpux_core_core_file_p /* a core file */ | |
252b5132 RH |
422 | }, |
423 | { /* bfd_set_format */ | |
8ce8c090 AM |
424 | bfd_false, bfd_false, |
425 | bfd_false, bfd_false | |
252b5132 RH |
426 | }, |
427 | { /* bfd_write_contents */ | |
8ce8c090 AM |
428 | bfd_false, bfd_false, |
429 | bfd_false, bfd_false | |
252b5132 | 430 | }, |
3fde5a36 | 431 | |
3f3c5c34 AM |
432 | BFD_JUMP_TABLE_GENERIC (_bfd_generic), |
433 | BFD_JUMP_TABLE_COPY (_bfd_generic), | |
434 | BFD_JUMP_TABLE_CORE (hpux_core), | |
435 | BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), | |
436 | BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), | |
437 | BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), | |
438 | BFD_JUMP_TABLE_WRITE (_bfd_generic), | |
439 | BFD_JUMP_TABLE_LINK (_bfd_nolink), | |
440 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
252b5132 | 441 | |
c3c89269 | 442 | NULL, |
3fde5a36 | 443 | |
252b5132 | 444 | (PTR) 0 /* backend_data */ |
8ce8c090 | 445 | }; |