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[/] [openrisc/] [trunk/] [gnu-src/] [binutils-2.18.50/] [bfd/] [hpux-core.c] - Blame information for rev 156

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/* BFD back-end for HP/UX core files.
2
   Copyright 1993, 1994, 1996, 1998, 1999, 2001, 2002, 2003, 2004, 2006,
3
   2007 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
22
   MA 02110-1301, USA.  */
23
 
24
 
25
/* This file can only be compiled on systems which use HP/UX style
26
   core files.  */
27
 
28
#include "sysdep.h"
29
#include "bfd.h"
30
#include "libbfd.h"
31
 
32
#if defined (HOST_HPPAHPUX) || defined (HOST_HP300HPUX) || defined (HOST_HPPAMPEIX)
33
 
34
/* FIXME: sys/core.h doesn't exist for HPUX version 7.  HPUX version
35
   5, 6, and 7 core files seem to be standard trad-core.c type core
36
   files; can we just use trad-core.c in addition to this file?  */
37
 
38
#include <sys/core.h>
39
#include <sys/utsname.h>
40
 
41
#endif /* HOST_HPPAHPUX */
42
 
43
#ifdef HOST_HPPABSD
44
 
45
/* Not a very swift place to put it, but that's where the BSD port
46
   puts them.  */
47
#include "/hpux/usr/include/sys/core.h"
48
 
49
#endif /* HOST_HPPABSD */
50
 
51
#include <sys/param.h>
52
#ifdef HAVE_DIRENT_H
53
# include <dirent.h>
54
#else
55
# ifdef HAVE_SYS_NDIR_H
56
#  include <sys/ndir.h>
57
# endif
58
# ifdef HAVE_SYS_DIR_H
59
#  include <sys/dir.h>
60
# endif
61
# ifdef HAVE_NDIR_H
62
#  include <ndir.h>
63
# endif
64
#endif
65
#include <signal.h>
66
#ifdef HPUX_CORE
67
#include <machine/reg.h>
68
#endif
69
#include <sys/user.h>           /* After a.out.h  */
70
#include <sys/file.h>
71
 
72
/* Kludge: There's no explicit mechanism provided by sys/core.h to
73
   conditionally know whether a proc_info has thread id fields.
74
   However, CORE_ANON_SHMEM shows up first at 10.30, which is
75
   happily also when meaningful thread id's show up in proc_info. */
76
#if defined(CORE_ANON_SHMEM)
77
#define PROC_INFO_HAS_THREAD_ID (1)
78
#endif
79
 
80
/* This type appears at HP-UX 10.30.  Defining it if not defined
81
   by sys/core.h allows us to build for older HP-UX's, and (since
82
   it won't be encountered in core-dumps from older HP-UX's) is
83
   harmless. */
84
#if !defined(CORE_ANON_SHMEM)
85
#define CORE_ANON_SHMEM 0x00000200         /* anonymous shared memory */
86
#endif
87
 
88
/* These are stored in the bfd's tdata */
89
 
90
/* .lwpid and .user_tid are only valid if PROC_INFO_HAS_THREAD_ID, else they
91
   are set to 0.  Also, until HP-UX implements MxN threads, .user_tid and
92
   .lwpid are synonymous. */
93
struct hpux_core_struct
94
{
95
  int sig;
96
  int lwpid;               /* Kernel thread ID. */
97
  unsigned long user_tid;  /* User thread ID. */
98
  char cmd[MAXCOMLEN + 1];
99
};
100
 
101
#define core_hdr(bfd) ((bfd)->tdata.hpux_core_data)
102
#define core_signal(bfd) (core_hdr(bfd)->sig)
103
#define core_command(bfd) (core_hdr(bfd)->cmd)
104
#define core_kernel_thread_id(bfd) (core_hdr(bfd)->lwpid)
105
#define core_user_thread_id(bfd) (core_hdr(bfd)->user_tid)
106
#define hpux_core_core_file_matches_executable_p generic_core_file_matches_executable_p
107
 
108
static asection *make_bfd_asection (bfd *, const char *, flagword,
109
                                    bfd_size_type, bfd_vma, unsigned int);
110
static const bfd_target *hpux_core_core_file_p (bfd *);
111
static char *hpux_core_core_file_failing_command (bfd *);
112
static int hpux_core_core_file_failing_signal (bfd *);
113
static void swap_abort (void);
114
 
115
static asection *
116
make_bfd_asection (bfd *abfd, const char *name, flagword flags,
117
                   bfd_size_type size, bfd_vma vma,
118
                   unsigned int alignment_power)
119
{
120
  asection *asect;
121
  char *newname;
122
 
123
  newname = bfd_alloc (abfd, (bfd_size_type) strlen (name) + 1);
124
  if (!newname)
125
    return NULL;
126
 
127
  strcpy (newname, name);
128
 
129
  asect = bfd_make_section_anyway_with_flags (abfd, newname, flags);
130
  if (!asect)
131
    return NULL;
132
 
133
  asect->size = size;
134
  asect->vma = vma;
135
  asect->filepos = bfd_tell (abfd);
136
  asect->alignment_power = alignment_power;
137
 
138
  return asect;
139
}
140
 
141
/* Return true if the given core file section corresponds to a thread,
142
   based on its name.  */
143
 
144
static int
145
thread_section_p (bfd *abfd ATTRIBUTE_UNUSED,
146
                  asection *sect,
147
                  void *obj ATTRIBUTE_UNUSED)
148
{
149
  return CONST_STRNEQ (sect->name, ".reg/");
150
}
151
 
152
/* this function builds a bfd target if the file is a corefile.
153
   It returns null or 0 if it finds out thaat it is not a core file.
154
   The way it checks this is by looking for allowed 'type' field values.
155
   These are declared in sys/core.h
156
   There are some values which are 'reserved for future use'. In particular
157
   CORE_NONE is actually defined as 0. This may be a catch-all for cases
158
   in which the core file is generated by some non-hpux application.
159
   (I am just guessing here!)
160
*/
161
static const bfd_target *
162
hpux_core_core_file_p (bfd *abfd)
163
{
164
  int  good_sections = 0;
165
  int  unknown_sections = 0;
166
 
167
  core_hdr (abfd) = (struct hpux_core_struct *)
168
    bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hpux_core_struct));
169
  if (!core_hdr (abfd))
170
    return NULL;
171
 
172
  while (1)
173
    {
174
      int val;
175
      struct corehead core_header;
176
 
177
      val = bfd_bread ((void *) &core_header,
178
                      (bfd_size_type) sizeof core_header, abfd);
179
      if (val <= 0)
180
        break;
181
      switch (core_header.type)
182
        {
183
        case CORE_KERNEL:
184
        case CORE_FORMAT:
185
          /* Just skip this.  */
186
          bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
187
          good_sections++;
188
          break;
189
        case CORE_EXEC:
190
          {
191
            struct proc_exec proc_exec;
192
            if (bfd_bread ((void *) &proc_exec, (bfd_size_type) core_header.len,
193
                          abfd) != core_header.len)
194
              break;
195
            strncpy (core_command (abfd), proc_exec.cmd, MAXCOMLEN + 1);
196
            good_sections++;
197
          }
198
          break;
199
        case CORE_PROC:
200
          {
201
            struct proc_info proc_info;
202
            char  secname[100];  /* Of arbitrary size, but plenty large. */
203
 
204
            /* We need to read this section, 'cause we need to determine
205
               whether the core-dumped app was threaded before we create
206
               any .reg sections. */
207
            if (bfd_bread (&proc_info, (bfd_size_type) core_header.len, abfd)
208
                != core_header.len)
209
              break;
210
 
211
              /* However, we also want to create those sections with the
212
                 file positioned at the start of the record, it seems. */
213
            if (bfd_seek (abfd, -((file_ptr) core_header.len), SEEK_CUR) != 0)
214
              break;
215
 
216
#if defined(PROC_INFO_HAS_THREAD_ID)
217
            core_kernel_thread_id (abfd) = proc_info.lwpid;
218
            core_user_thread_id (abfd) = proc_info.user_tid;
219
#else
220
            core_kernel_thread_id (abfd) = 0;
221
            core_user_thread_id (abfd) = 0;
222
#endif
223
            /* If the program was unthreaded, then we'll just create a
224
               .reg section.
225
 
226
               If the program was threaded, then we'll create .reg/XXXXX
227
               section for each thread, where XXXXX is a printable
228
               representation of the kernel thread id.  We'll also
229
               create a .reg section for the thread that was running
230
               and signalled at the time of the core-dump (i.e., this
231
               is effectively an alias, needed to keep GDB happy.)
232
 
233
               Note that we use `.reg/XXXXX' as opposed to '.regXXXXX'
234
               because GDB expects that .reg2 will be the floating-
235
               point registers. */
236
            if (core_kernel_thread_id (abfd) == 0)
237
              {
238
                if (!make_bfd_asection (abfd, ".reg",
239
                                        SEC_HAS_CONTENTS,
240
                                        core_header.len,
241
                                        (bfd_vma) offsetof (struct proc_info,
242
                                                            hw_regs),
243
                                        2))
244
                  goto fail;
245
              }
246
            else
247
              {
248
                /* There are threads.  Is this the one that caused the
249
                   core-dump?  We'll claim it was the running thread. */
250
                if (proc_info.sig != -1)
251
                  {
252
                    if (!make_bfd_asection (abfd, ".reg",
253
                                            SEC_HAS_CONTENTS,
254
                                            core_header.len,
255
                                            (bfd_vma)offsetof (struct proc_info,
256
                                                               hw_regs),
257
                                            2))
258
                      goto fail;
259
                  }
260
                /* We always make one of these sections, for every thread. */
261
                sprintf (secname, ".reg/%d", core_kernel_thread_id (abfd));
262
                if (!make_bfd_asection (abfd, secname,
263
                                        SEC_HAS_CONTENTS,
264
                                        core_header.len,
265
                                        (bfd_vma) offsetof (struct proc_info,
266
                                                            hw_regs),
267
                                        2))
268
                  goto fail;
269
              }
270
            core_signal (abfd) = proc_info.sig;
271
            if (bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR) != 0)
272
              break;
273
            good_sections++;
274
          }
275
          break;
276
 
277
        case CORE_DATA:
278
        case CORE_STACK:
279
        case CORE_TEXT:
280
        case CORE_MMF:
281
        case CORE_SHM:
282
        case CORE_ANON_SHMEM:
283
          if (!make_bfd_asection (abfd, ".data",
284
                                  SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
285
                                  core_header.len,
286
                                  (bfd_vma) core_header.addr, 2))
287
            goto fail;
288
 
289
          bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
290
          good_sections++;
291
          break;
292
 
293
        case CORE_NONE:
294
          /* Let's not punt if we encounter a section of unknown
295
             type.  Rather, let's make a note of it.  If we later
296
             see that there were also "good" sections, then we'll
297
             declare that this a core file, but we'll also warn that
298
             it may be incompatible with this gdb.
299
             */
300
          unknown_sections++;
301
          break;
302
 
303
         default:
304
           goto fail; /*unrecognized core file type */
305
        }
306
    }
307
 
308
  /* OK, we believe you.  You're a core file (sure, sure).  */
309
 
310
  /* On HP/UX, we sometimes encounter core files where none of the threads
311
     was found to be the running thread (ie the signal was set to -1 for
312
     all threads).  This happens when the program was aborted externally
313
     via a TT_CORE ttrace system call.  In that case, we just pick one
314
     thread at random to be the active thread.  */
315
  if (core_kernel_thread_id (abfd) != 0
316
      && bfd_get_section_by_name (abfd, ".reg") == NULL)
317
    {
318
      asection *asect = bfd_sections_find_if (abfd, thread_section_p, NULL);
319
      asection *reg_sect;
320
 
321
      if (asect != NULL)
322
        {
323
          reg_sect = make_bfd_asection (abfd, ".reg", asect->flags,
324
                                        asect->size, asect->vma,
325
                                        asect->alignment_power);
326
          if (reg_sect == NULL)
327
            goto fail;
328
 
329
          reg_sect->filepos = asect->filepos;
330
        }
331
    }
332
 
333
  /* Were there sections of unknown type?  If so, yet there were
334
     at least some complete sections of known type, then, issue
335
     a warning.  Possibly the core file was generated on a version
336
     of HP-UX that is incompatible with that for which this gdb was
337
     built.
338
     */
339
  if ((unknown_sections > 0) && (good_sections > 0))
340
    (*_bfd_error_handler)
341
      ("%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",
342
       abfd->filename);
343
 
344
  return abfd->xvec;
345
 
346
 fail:
347
  bfd_release (abfd, core_hdr (abfd));
348
  core_hdr (abfd) = NULL;
349
  bfd_section_list_clear (abfd);
350
  return NULL;
351
}
352
 
353
static char *
354
hpux_core_core_file_failing_command (bfd *abfd)
355
{
356
  return core_command (abfd);
357
}
358
 
359
static int
360
hpux_core_core_file_failing_signal (bfd *abfd)
361
{
362
  return core_signal (abfd);
363
}
364
 
365
 
366
/* If somebody calls any byte-swapping routines, shoot them.  */
367
static void
368
swap_abort (void)
369
{
370
  abort(); /* This way doesn't require any declaration for ANSI to fuck up */
371
}
372
 
373
#define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
374
#define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
375
#define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
376
#define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
377
#define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
378
#define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
379
 
380
const bfd_target hpux_core_vec =
381
  {
382
    "hpux-core",
383
    bfd_target_unknown_flavour,
384
    BFD_ENDIAN_BIG,             /* target byte order */
385
    BFD_ENDIAN_BIG,             /* target headers byte order */
386
    (HAS_RELOC | EXEC_P |       /* object flags */
387
     HAS_LINENO | HAS_DEBUG |
388
     HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
389
    (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
390
    0,                                                      /* symbol prefix */
391
    ' ',                                                   /* ar_pad_char */
392
    16,                                                    /* ar_max_namelen */
393
    NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data */
394
    NO_GET, NO_GETS, NO_PUT,            /* 32 bit data */
395
    NO_GET, NO_GETS, NO_PUT,            /* 16 bit data */
396
    NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs */
397
    NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs */
398
    NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs */
399
 
400
    {                           /* bfd_check_format */
401
      _bfd_dummy_target,                /* unknown format */
402
      _bfd_dummy_target,                /* object file */
403
      _bfd_dummy_target,                /* archive */
404
      hpux_core_core_file_p             /* a core file */
405
    },
406
    {                           /* bfd_set_format */
407
      bfd_false, bfd_false,
408
      bfd_false, bfd_false
409
    },
410
    {                           /* bfd_write_contents */
411
      bfd_false, bfd_false,
412
      bfd_false, bfd_false
413
    },
414
 
415
    BFD_JUMP_TABLE_GENERIC (_bfd_generic),
416
    BFD_JUMP_TABLE_COPY (_bfd_generic),
417
    BFD_JUMP_TABLE_CORE (hpux_core),
418
    BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
419
    BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
420
    BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
421
    BFD_JUMP_TABLE_WRITE (_bfd_generic),
422
    BFD_JUMP_TABLE_LINK (_bfd_nolink),
423
    BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
424
 
425
    NULL,
426
 
427
    (PTR) 0                      /* backend_data */
428
  };

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