Commit | Line | Data |
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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> | |
9b818146 | 64 | #ifdef HPUX_CORE |
252b5132 | 65 | #include <machine/reg.h> |
9b818146 | 66 | #endif |
252b5132 RH |
67 | #include <sys/user.h> /* After a.out.h */ |
68 | #include <sys/file.h> | |
69 | ||
70 | /* Kludge: There's no explicit mechanism provided by sys/core.h to | |
71 | conditionally know whether a proc_info has thread id fields. | |
72 | However, CORE_ANON_SHMEM shows up first at 10.30, which is | |
73 | happily also when meaningful thread id's show up in proc_info. */ | |
74 | #if defined(CORE_ANON_SHMEM) | |
75 | #define PROC_INFO_HAS_THREAD_ID (1) | |
76 | #endif | |
77 | ||
78 | /* This type appears at HP-UX 10.30. Defining it if not defined | |
79 | by sys/core.h allows us to build for older HP-UX's, and (since | |
80 | it won't be encountered in core-dumps from older HP-UX's) is | |
81 | harmless. */ | |
82 | #if !defined(CORE_ANON_SHMEM) | |
83 | #define CORE_ANON_SHMEM 0x00000200 /* anonymous shared memory */ | |
84 | #endif | |
85 | ||
86 | /* These are stored in the bfd's tdata */ | |
87 | ||
88 | /* .lwpid and .user_tid are only valid if PROC_INFO_HAS_THREAD_ID, else they | |
89 | are set to 0. Also, until HP-UX implements MxN threads, .user_tid and | |
90 | .lwpid are synonymous. */ | |
3fde5a36 | 91 | struct hpux_core_struct |
252b5132 RH |
92 | { |
93 | int sig; | |
94 | int lwpid; /* Kernel thread ID. */ | |
95 | unsigned long user_tid; /* User thread ID. */ | |
96 | char cmd[MAXCOMLEN + 1]; | |
97 | }; | |
98 | ||
99 | #define core_hdr(bfd) ((bfd)->tdata.hpux_core_data) | |
100 | #define core_signal(bfd) (core_hdr(bfd)->sig) | |
101 | #define core_command(bfd) (core_hdr(bfd)->cmd) | |
102 | #define core_kernel_thread_id(bfd) (core_hdr(bfd)->lwpid) | |
103 | #define core_user_thread_id(bfd) (core_hdr(bfd)->user_tid) | |
104 | ||
dc810e39 AM |
105 | static asection *make_bfd_asection |
106 | PARAMS ((bfd *, const char *, flagword, bfd_size_type, bfd_vma, | |
107 | unsigned int)); | |
b34976b6 AM |
108 | static const bfd_target *hpux_core_core_file_p |
109 | PARAMS ((bfd *)); | |
110 | static char *hpux_core_core_file_failing_command | |
111 | PARAMS ((bfd *)); | |
112 | static int hpux_core_core_file_failing_signal | |
113 | PARAMS ((bfd *)); | |
114 | static bfd_boolean hpux_core_core_file_matches_executable_p | |
dc810e39 | 115 | PARAMS ((bfd *, bfd *)); |
b34976b6 AM |
116 | static void swap_abort |
117 | PARAMS ((void)); | |
252b5132 RH |
118 | |
119 | static asection * | |
eea6121a | 120 | make_bfd_asection (abfd, name, flags, size, vma, alignment_power) |
252b5132 | 121 | bfd *abfd; |
dc810e39 | 122 | const char *name; |
252b5132 | 123 | flagword flags; |
eea6121a | 124 | bfd_size_type size; |
252b5132 RH |
125 | bfd_vma vma; |
126 | unsigned int alignment_power; | |
127 | { | |
128 | asection *asect; | |
129 | char *newname; | |
130 | ||
dc810e39 | 131 | newname = bfd_alloc (abfd, (bfd_size_type) strlen (name) + 1); |
252b5132 RH |
132 | if (!newname) |
133 | return NULL; | |
134 | ||
135 | strcpy (newname, name); | |
136 | ||
137 | asect = bfd_make_section_anyway (abfd, newname); | |
138 | if (!asect) | |
139 | return NULL; | |
140 | ||
141 | asect->flags = flags; | |
eea6121a | 142 | asect->size = size; |
252b5132 RH |
143 | asect->vma = vma; |
144 | asect->filepos = bfd_tell (abfd); | |
145 | asect->alignment_power = alignment_power; | |
146 | ||
147 | return asect; | |
148 | } | |
149 | ||
94ea025a JB |
150 | /* Return true if the given core file section corresponds to a thread, |
151 | based on its name. */ | |
152 | ||
153 | static int | |
154 | thread_section_p (bfd *abfd ATTRIBUTE_UNUSED, | |
155 | asection *sect, | |
156 | void *obj ATTRIBUTE_UNUSED) | |
157 | { | |
158 | return (strncmp (bfd_section_name (abfd, sect), ".reg/", 5) == 0); | |
159 | } | |
160 | ||
252b5132 RH |
161 | /* this function builds a bfd target if the file is a corefile. |
162 | It returns null or 0 if it finds out thaat it is not a core file. | |
163 | The way it checks this is by looking for allowed 'type' field values. | |
164 | These are declared in sys/core.h | |
165 | There are some values which are 'reserved for future use'. In particular | |
166 | CORE_NONE is actually defined as 0. This may be a catch-all for cases | |
167 | in which the core file is generated by some non-hpux application. | |
168 | (I am just guessing here!) | |
169 | */ | |
170 | static const bfd_target * | |
171 | hpux_core_core_file_p (abfd) | |
172 | bfd *abfd; | |
173 | { | |
174 | int good_sections = 0; | |
175 | int unknown_sections = 0; | |
176 | ||
177 | core_hdr (abfd) = (struct hpux_core_struct *) | |
dc810e39 | 178 | bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hpux_core_struct)); |
252b5132 RH |
179 | if (!core_hdr (abfd)) |
180 | return NULL; | |
181 | ||
182 | while (1) | |
183 | { | |
184 | int val; | |
185 | struct corehead core_header; | |
186 | ||
dc810e39 AM |
187 | val = bfd_bread ((void *) &core_header, |
188 | (bfd_size_type) sizeof core_header, abfd); | |
252b5132 RH |
189 | if (val <= 0) |
190 | break; | |
191 | switch (core_header.type) | |
192 | { | |
193 | case CORE_KERNEL: | |
194 | case CORE_FORMAT: | |
dc810e39 AM |
195 | /* Just skip this. */ |
196 | bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR); | |
252b5132 RH |
197 | good_sections++; |
198 | break; | |
199 | case CORE_EXEC: | |
200 | { | |
201 | struct proc_exec proc_exec; | |
dc810e39 AM |
202 | if (bfd_bread ((void *) &proc_exec, (bfd_size_type) core_header.len, |
203 | abfd) != core_header.len) | |
252b5132 RH |
204 | break; |
205 | strncpy (core_command (abfd), proc_exec.cmd, MAXCOMLEN + 1); | |
206 | good_sections++; | |
207 | } | |
208 | break; | |
209 | case CORE_PROC: | |
210 | { | |
211 | struct proc_info proc_info; | |
212 | char secname[100]; /* Of arbitrary size, but plenty large. */ | |
213 | ||
214 | /* We need to read this section, 'cause we need to determine | |
215 | whether the core-dumped app was threaded before we create | |
216 | any .reg sections. */ | |
dc810e39 | 217 | if (bfd_bread (&proc_info, (bfd_size_type) core_header.len, abfd) |
252b5132 RH |
218 | != core_header.len) |
219 | break; | |
220 | ||
221 | /* However, we also want to create those sections with the | |
222 | file positioned at the start of the record, it seems. */ | |
94ea025a | 223 | if (bfd_seek (abfd, -((file_ptr) core_header.len), SEEK_CUR) != 0) |
252b5132 RH |
224 | break; |
225 | ||
226 | #if defined(PROC_INFO_HAS_THREAD_ID) | |
227 | core_kernel_thread_id (abfd) = proc_info.lwpid; | |
228 | core_user_thread_id (abfd) = proc_info.user_tid; | |
229 | #else | |
230 | core_kernel_thread_id (abfd) = 0; | |
231 | core_user_thread_id (abfd) = 0; | |
232 | #endif | |
233 | /* If the program was unthreaded, then we'll just create a | |
234 | .reg section. | |
235 | ||
236 | If the program was threaded, then we'll create .reg/XXXXX | |
237 | section for each thread, where XXXXX is a printable | |
238 | representation of the kernel thread id. We'll also | |
239 | create a .reg section for the thread that was running | |
240 | and signalled at the time of the core-dump (i.e., this | |
241 | is effectively an alias, needed to keep GDB happy.) | |
242 | ||
243 | Note that we use `.reg/XXXXX' as opposed to '.regXXXXX' | |
244 | because GDB expects that .reg2 will be the floating- | |
245 | point registers. */ | |
246 | if (core_kernel_thread_id (abfd) == 0) | |
247 | { | |
248 | if (!make_bfd_asection (abfd, ".reg", | |
3dd2fcf0 DA |
249 | SEC_HAS_CONTENTS, |
250 | core_header.len, | |
251 | (bfd_vma) offsetof (struct proc_info, | |
252 | hw_regs), | |
253 | 2)) | |
9e7b37b3 | 254 | goto fail; |
252b5132 RH |
255 | } |
256 | else | |
257 | { | |
258 | /* There are threads. Is this the one that caused the | |
259 | core-dump? We'll claim it was the running thread. */ | |
260 | if (proc_info.sig != -1) | |
261 | { | |
262 | if (!make_bfd_asection (abfd, ".reg", | |
263 | SEC_HAS_CONTENTS, | |
264 | core_header.len, | |
3dd2fcf0 DA |
265 | (bfd_vma)offsetof (struct proc_info, |
266 | hw_regs), | |
252b5132 | 267 | 2)) |
9e7b37b3 | 268 | goto fail; |
252b5132 RH |
269 | } |
270 | /* We always make one of these sections, for every thread. */ | |
271 | sprintf (secname, ".reg/%d", core_kernel_thread_id (abfd)); | |
272 | if (!make_bfd_asection (abfd, secname, | |
3dd2fcf0 DA |
273 | SEC_HAS_CONTENTS, |
274 | core_header.len, | |
275 | (bfd_vma) offsetof (struct proc_info, | |
276 | hw_regs), | |
277 | 2)) | |
9e7b37b3 | 278 | goto fail; |
252b5132 RH |
279 | } |
280 | core_signal (abfd) = proc_info.sig; | |
dc810e39 | 281 | if (bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR) != 0) |
252b5132 RH |
282 | break; |
283 | good_sections++; | |
284 | } | |
285 | break; | |
286 | ||
287 | case CORE_DATA: | |
288 | case CORE_STACK: | |
289 | case CORE_TEXT: | |
290 | case CORE_MMF: | |
291 | case CORE_SHM: | |
292 | case CORE_ANON_SHMEM: | |
293 | if (!make_bfd_asection (abfd, ".data", | |
294 | SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, | |
5198ba8b DA |
295 | core_header.len, |
296 | (bfd_vma) core_header.addr, 2)) | |
9e7b37b3 | 297 | goto fail; |
252b5132 | 298 | |
dc810e39 | 299 | bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR); |
252b5132 RH |
300 | good_sections++; |
301 | break; | |
302 | ||
303 | case CORE_NONE: | |
304 | /* Let's not punt if we encounter a section of unknown | |
305 | type. Rather, let's make a note of it. If we later | |
306 | see that there were also "good" sections, then we'll | |
307 | declare that this a core file, but we'll also warn that | |
308 | it may be incompatible with this gdb. | |
309 | */ | |
310 | unknown_sections++; | |
311 | break; | |
3fde5a36 | 312 | |
9e7b37b3 AM |
313 | default: |
314 | goto fail; /*unrecognized core file type */ | |
252b5132 RH |
315 | } |
316 | } | |
317 | ||
318 | /* OK, we believe you. You're a core file (sure, sure). */ | |
319 | ||
94ea025a JB |
320 | /* On HP/UX, we sometimes encounter core files where none of the threads |
321 | was found to be the running thread (ie the signal was set to -1 for | |
322 | all threads). This happens when the program was aborted externally | |
323 | via a TT_CORE ttrace system call. In that case, we just pick one | |
324 | thread at random to be the active thread. */ | |
325 | if (core_kernel_thread_id (abfd) != 0 | |
326 | && bfd_get_section_by_name (abfd, ".reg") == NULL) | |
327 | { | |
328 | asection *asect = bfd_sections_find_if (abfd, thread_section_p, NULL); | |
329 | asection *reg_sect; | |
330 | ||
331 | if (asect != NULL) | |
332 | { | |
333 | reg_sect = make_bfd_asection (abfd, ".reg", asect->flags, | |
334 | asect->size, asect->vma, | |
335 | asect->alignment_power); | |
336 | if (reg_sect == NULL) | |
337 | goto fail; | |
338 | ||
339 | reg_sect->filepos = asect->filepos; | |
340 | } | |
341 | } | |
342 | ||
252b5132 RH |
343 | /* Were there sections of unknown type? If so, yet there were |
344 | at least some complete sections of known type, then, issue | |
345 | a warning. Possibly the core file was generated on a version | |
346 | of HP-UX that is incompatible with that for which this gdb was | |
347 | built. | |
348 | */ | |
349 | if ((unknown_sections > 0) && (good_sections > 0)) | |
350 | (*_bfd_error_handler) | |
351 | ("%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", | |
352 | abfd->filename); | |
353 | ||
354 | return abfd->xvec; | |
9e7b37b3 AM |
355 | |
356 | fail: | |
357 | bfd_release (abfd, core_hdr (abfd)); | |
358 | core_hdr (abfd) = NULL; | |
359 | bfd_section_list_clear (abfd); | |
360 | return NULL; | |
252b5132 RH |
361 | } |
362 | ||
363 | static char * | |
364 | hpux_core_core_file_failing_command (abfd) | |
365 | bfd *abfd; | |
366 | { | |
367 | return core_command (abfd); | |
368 | } | |
369 | ||
252b5132 RH |
370 | static int |
371 | hpux_core_core_file_failing_signal (abfd) | |
372 | bfd *abfd; | |
373 | { | |
374 | return core_signal (abfd); | |
375 | } | |
376 | ||
b34976b6 | 377 | static bfd_boolean |
252b5132 | 378 | hpux_core_core_file_matches_executable_p (core_bfd, exec_bfd) |
dc810e39 AM |
379 | bfd *core_bfd ATTRIBUTE_UNUSED; |
380 | bfd *exec_bfd ATTRIBUTE_UNUSED; | |
252b5132 | 381 | { |
b34976b6 | 382 | return TRUE; /* FIXME, We have no way of telling at this point */ |
252b5132 RH |
383 | } |
384 | \f | |
252b5132 RH |
385 | /* If somebody calls any byte-swapping routines, shoot them. */ |
386 | static void | |
dc810e39 | 387 | swap_abort () |
252b5132 RH |
388 | { |
389 | abort(); /* This way doesn't require any declaration for ANSI to fuck up */ | |
390 | } | |
8ce8c090 | 391 | |
edeb6e24 AM |
392 | #define NO_GET ((bfd_vma (*) (const void *)) swap_abort) |
393 | #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort) | |
394 | #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort) | |
8ce8c090 AM |
395 | #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort) |
396 | #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort) | |
397 | #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort) | |
252b5132 RH |
398 | |
399 | const bfd_target hpux_core_vec = | |
400 | { | |
401 | "hpux-core", | |
402 | bfd_target_unknown_flavour, | |
403 | BFD_ENDIAN_BIG, /* target byte order */ | |
404 | BFD_ENDIAN_BIG, /* target headers byte order */ | |
405 | (HAS_RELOC | EXEC_P | /* object flags */ | |
406 | HAS_LINENO | HAS_DEBUG | | |
407 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
408 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
409 | 0, /* symbol prefix */ | |
410 | ' ', /* ar_pad_char */ | |
411 | 16, /* ar_max_namelen */ | |
8ce8c090 | 412 | NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */ |
edeb6e24 AM |
413 | NO_GET, NO_GETS, NO_PUT, /* 32 bit data */ |
414 | NO_GET, NO_GETS, NO_PUT, /* 16 bit data */ | |
8ce8c090 | 415 | NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */ |
edeb6e24 AM |
416 | NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */ |
417 | NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */ | |
252b5132 RH |
418 | |
419 | { /* bfd_check_format */ | |
8ce8c090 AM |
420 | _bfd_dummy_target, /* unknown format */ |
421 | _bfd_dummy_target, /* object file */ | |
422 | _bfd_dummy_target, /* archive */ | |
423 | hpux_core_core_file_p /* a core file */ | |
252b5132 RH |
424 | }, |
425 | { /* bfd_set_format */ | |
8ce8c090 AM |
426 | bfd_false, bfd_false, |
427 | bfd_false, bfd_false | |
252b5132 RH |
428 | }, |
429 | { /* bfd_write_contents */ | |
8ce8c090 AM |
430 | bfd_false, bfd_false, |
431 | bfd_false, bfd_false | |
252b5132 | 432 | }, |
3fde5a36 | 433 | |
3f3c5c34 AM |
434 | BFD_JUMP_TABLE_GENERIC (_bfd_generic), |
435 | BFD_JUMP_TABLE_COPY (_bfd_generic), | |
436 | BFD_JUMP_TABLE_CORE (hpux_core), | |
437 | BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), | |
438 | BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), | |
439 | BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), | |
440 | BFD_JUMP_TABLE_WRITE (_bfd_generic), | |
441 | BFD_JUMP_TABLE_LINK (_bfd_nolink), | |
442 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
252b5132 | 443 | |
c3c89269 | 444 | NULL, |
3fde5a36 | 445 | |
252b5132 | 446 | (PTR) 0 /* backend_data */ |
8ce8c090 | 447 | }; |