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
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., 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. */
89 struct 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
103 static asection *make_bfd_asection
104 PARAMS ((bfd *, const char *, flagword, bfd_size_type, bfd_vma,
105 unsigned int));
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
113 PARAMS ((bfd *, bfd *));
114 static void swap_abort
115 PARAMS ((void));
116
117 static asection *
make_bfd_asection(abfd,name,flags,_raw_size,vma,alignment_power)118 make_bfd_asection (abfd, name, flags, _raw_size, vma, alignment_power)
119 bfd *abfd;
120 const char *name;
121 flagword flags;
122 bfd_size_type _raw_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->_raw_size = _raw_size;
141 asect->vma = vma;
142 asect->filepos = bfd_tell (abfd);
143 asect->alignment_power = alignment_power;
144
145 return asect;
146 }
147
148 /* this function builds a bfd target if the file is a corefile.
149 It returns null or 0 if it finds out thaat it is not a core file.
150 The way it checks this is by looking for allowed 'type' field values.
151 These are declared in sys/core.h
152 There are some values which are 'reserved for future use'. In particular
153 CORE_NONE is actually defined as 0. This may be a catch-all for cases
154 in which the core file is generated by some non-hpux application.
155 (I am just guessing here!)
156 */
157 static const bfd_target *
hpux_core_core_file_p(abfd)158 hpux_core_core_file_p (abfd)
159 bfd *abfd;
160 {
161 int good_sections = 0;
162 int unknown_sections = 0;
163
164 core_hdr (abfd) = (struct hpux_core_struct *)
165 bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hpux_core_struct));
166 if (!core_hdr (abfd))
167 return NULL;
168
169 while (1)
170 {
171 int val;
172 struct corehead core_header;
173
174 val = bfd_bread ((void *) &core_header,
175 (bfd_size_type) sizeof core_header, abfd);
176 if (val <= 0)
177 break;
178 switch (core_header.type)
179 {
180 case CORE_KERNEL:
181 case CORE_FORMAT:
182 /* Just skip this. */
183 bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
184 good_sections++;
185 break;
186 case CORE_EXEC:
187 {
188 struct proc_exec proc_exec;
189 if (bfd_bread ((void *) &proc_exec, (bfd_size_type) core_header.len,
190 abfd) != core_header.len)
191 break;
192 strncpy (core_command (abfd), proc_exec.cmd, MAXCOMLEN + 1);
193 good_sections++;
194 }
195 break;
196 case CORE_PROC:
197 {
198 struct proc_info proc_info;
199 char secname[100]; /* Of arbitrary size, but plenty large. */
200
201 /* We need to read this section, 'cause we need to determine
202 whether the core-dumped app was threaded before we create
203 any .reg sections. */
204 if (bfd_bread (&proc_info, (bfd_size_type) core_header.len, abfd)
205 != core_header.len)
206 break;
207
208 /* However, we also want to create those sections with the
209 file positioned at the start of the record, it seems. */
210 if (bfd_seek (abfd, (file_ptr) -core_header.len, SEEK_CUR) != 0)
211 break;
212
213 #if defined(PROC_INFO_HAS_THREAD_ID)
214 core_kernel_thread_id (abfd) = proc_info.lwpid;
215 core_user_thread_id (abfd) = proc_info.user_tid;
216 #else
217 core_kernel_thread_id (abfd) = 0;
218 core_user_thread_id (abfd) = 0;
219 #endif
220 /* If the program was unthreaded, then we'll just create a
221 .reg section.
222
223 If the program was threaded, then we'll create .reg/XXXXX
224 section for each thread, where XXXXX is a printable
225 representation of the kernel thread id. We'll also
226 create a .reg section for the thread that was running
227 and signalled at the time of the core-dump (i.e., this
228 is effectively an alias, needed to keep GDB happy.)
229
230 Note that we use `.reg/XXXXX' as opposed to '.regXXXXX'
231 because GDB expects that .reg2 will be the floating-
232 point registers. */
233 if (core_kernel_thread_id (abfd) == 0)
234 {
235 if (!make_bfd_asection (abfd, ".reg",
236 SEC_HAS_CONTENTS,
237 core_header.len,
238 (int) &proc_info - (int) & proc_info.hw_regs,
239 2))
240 goto fail;
241 }
242 else
243 {
244 /* There are threads. Is this the one that caused the
245 core-dump? We'll claim it was the running thread. */
246 if (proc_info.sig != -1)
247 {
248 if (!make_bfd_asection (abfd, ".reg",
249 SEC_HAS_CONTENTS,
250 core_header.len,
251 (int) &proc_info - (int) & proc_info.hw_regs,
252 2))
253 goto fail;
254 }
255 /* We always make one of these sections, for every thread. */
256 sprintf (secname, ".reg/%d", core_kernel_thread_id (abfd));
257 if (!make_bfd_asection (abfd, secname,
258 SEC_HAS_CONTENTS,
259 core_header.len,
260 (int) &proc_info - (int) & proc_info.hw_regs,
261 2))
262 goto fail;
263 }
264 core_signal (abfd) = proc_info.sig;
265 if (bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR) != 0)
266 break;
267 good_sections++;
268 }
269 break;
270
271 case CORE_DATA:
272 case CORE_STACK:
273 case CORE_TEXT:
274 case CORE_MMF:
275 case CORE_SHM:
276 case CORE_ANON_SHMEM:
277 if (!make_bfd_asection (abfd, ".data",
278 SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
279 core_header.len, core_header.addr, 2))
280 goto fail;
281
282 bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
283 good_sections++;
284 break;
285
286 case CORE_NONE:
287 /* Let's not punt if we encounter a section of unknown
288 type. Rather, let's make a note of it. If we later
289 see that there were also "good" sections, then we'll
290 declare that this a core file, but we'll also warn that
291 it may be incompatible with this gdb.
292 */
293 unknown_sections++;
294 break;
295
296 default:
297 goto fail; /*unrecognized core file type */
298 }
299 }
300
301 /* OK, we believe you. You're a core file (sure, sure). */
302
303 /* Were there sections of unknown type? If so, yet there were
304 at least some complete sections of known type, then, issue
305 a warning. Possibly the core file was generated on a version
306 of HP-UX that is incompatible with that for which this gdb was
307 built.
308 */
309 if ((unknown_sections > 0) && (good_sections > 0))
310 (*_bfd_error_handler)
311 ("%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",
312 abfd->filename);
313
314 return abfd->xvec;
315
316 fail:
317 bfd_release (abfd, core_hdr (abfd));
318 core_hdr (abfd) = NULL;
319 bfd_section_list_clear (abfd);
320 return NULL;
321 }
322
323 static char *
hpux_core_core_file_failing_command(abfd)324 hpux_core_core_file_failing_command (abfd)
325 bfd *abfd;
326 {
327 return core_command (abfd);
328 }
329
330 static int
hpux_core_core_file_failing_signal(abfd)331 hpux_core_core_file_failing_signal (abfd)
332 bfd *abfd;
333 {
334 return core_signal (abfd);
335 }
336
337 static bfd_boolean
hpux_core_core_file_matches_executable_p(core_bfd,exec_bfd)338 hpux_core_core_file_matches_executable_p (core_bfd, exec_bfd)
339 bfd *core_bfd ATTRIBUTE_UNUSED;
340 bfd *exec_bfd ATTRIBUTE_UNUSED;
341 {
342 return TRUE; /* FIXME, We have no way of telling at this point */
343 }
344
345 /* If somebody calls any byte-swapping routines, shoot them. */
346 static void
swap_abort()347 swap_abort ()
348 {
349 abort(); /* This way doesn't require any declaration for ANSI to fuck up */
350 }
351
352 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
353 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
354 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
355 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
356 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
357 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
358
359 const bfd_target hpux_core_vec =
360 {
361 "hpux-core",
362 bfd_target_unknown_flavour,
363 BFD_ENDIAN_BIG, /* target byte order */
364 BFD_ENDIAN_BIG, /* target headers byte order */
365 (HAS_RELOC | EXEC_P | /* object flags */
366 HAS_LINENO | HAS_DEBUG |
367 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
368 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
369 0, /* symbol prefix */
370 ' ', /* ar_pad_char */
371 16, /* ar_max_namelen */
372 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
373 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
374 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
375 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
376 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
377 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
378
379 { /* bfd_check_format */
380 _bfd_dummy_target, /* unknown format */
381 _bfd_dummy_target, /* object file */
382 _bfd_dummy_target, /* archive */
383 hpux_core_core_file_p /* a core file */
384 },
385 { /* bfd_set_format */
386 bfd_false, bfd_false,
387 bfd_false, bfd_false
388 },
389 { /* bfd_write_contents */
390 bfd_false, bfd_false,
391 bfd_false, bfd_false
392 },
393
394 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
395 BFD_JUMP_TABLE_COPY (_bfd_generic),
396 BFD_JUMP_TABLE_CORE (hpux_core),
397 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
398 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
399 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
400 BFD_JUMP_TABLE_WRITE (_bfd_generic),
401 BFD_JUMP_TABLE_LINK (_bfd_nolink),
402 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
403
404 NULL,
405
406 (PTR) 0 /* backend_data */
407 };
408