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[/] [openrisc/] [trunk/] [gnu-src/] [binutils-2.20.1/] [bfd/] [hpux-core.c] - Blame information for rev 205

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/* BFD back-end for HP/UX core files.
2
   Copyright 1993, 1994, 1996, 1998, 1999, 2001, 2002, 2003, 2004, 2005, 2006,
3
   2007, 2008 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/file.h>
70
 
71
/* Kludge: There's no explicit mechanism provided by sys/core.h to
72
   conditionally know whether a proc_info has thread id fields.
73
   However, CORE_ANON_SHMEM shows up first at 10.30, which is
74
   happily also when meaningful thread id's show up in proc_info. */
75
#if defined(CORE_ANON_SHMEM)
76
#define PROC_INFO_HAS_THREAD_ID (1)
77
#endif
78
 
79
/* This type appears at HP-UX 10.30.  Defining it if not defined
80
   by sys/core.h allows us to build for older HP-UX's, and (since
81
   it won't be encountered in core-dumps from older HP-UX's) is
82
   harmless. */
83
#if !defined(CORE_ANON_SHMEM)
84
#define CORE_ANON_SHMEM 0x00000200         /* anonymous shared memory */
85
#endif
86
 
87
/* These are stored in the bfd's tdata */
88
 
89
/* .lwpid and .user_tid are only valid if PROC_INFO_HAS_THREAD_ID, else they
90
   are set to 0.  Also, until HP-UX implements MxN threads, .user_tid and
91
   .lwpid are synonymous. */
92
struct hpux_core_struct
93
{
94
  int sig;
95
  int lwpid;               /* Kernel thread ID. */
96
  unsigned long user_tid;  /* User thread ID. */
97
  char cmd[MAXCOMLEN + 1];
98
};
99
 
100
#define core_hdr(bfd) ((bfd)->tdata.hpux_core_data)
101
#define core_signal(bfd) (core_hdr(bfd)->sig)
102
#define core_command(bfd) (core_hdr(bfd)->cmd)
103
#define core_kernel_thread_id(bfd) (core_hdr(bfd)->lwpid)
104
#define core_user_thread_id(bfd) (core_hdr(bfd)->user_tid)
105
#define hpux_core_core_file_matches_executable_p generic_core_file_matches_executable_p
106
 
107
static asection *make_bfd_asection (bfd *, const char *, flagword,
108
                                    bfd_size_type, bfd_vma, unsigned int);
109
static const bfd_target *hpux_core_core_file_p (bfd *);
110
static char *hpux_core_core_file_failing_command (bfd *);
111
static int hpux_core_core_file_failing_signal (bfd *);
112
static void swap_abort (void);
113
 
114
static asection *
115
make_bfd_asection (bfd *abfd, const char *name, flagword flags,
116
                   bfd_size_type size, bfd_vma vma,
117
                   unsigned int alignment_power)
118
{
119
  asection *asect;
120
  char *newname;
121
 
122
  newname = bfd_alloc (abfd, (bfd_size_type) strlen (name) + 1);
123
  if (!newname)
124
    return NULL;
125
 
126
  strcpy (newname, name);
127
 
128
  asect = bfd_make_section_anyway_with_flags (abfd, newname, flags);
129
  if (!asect)
130
    return NULL;
131
 
132
  asect->size = size;
133
  asect->vma = vma;
134
  asect->filepos = bfd_tell (abfd);
135
  asect->alignment_power = alignment_power;
136
 
137
  return asect;
138
}
139
 
140
/* Return true if the given core file section corresponds to a thread,
141
   based on its name.  */
142
 
143
static int
144
thread_section_p (bfd *abfd ATTRIBUTE_UNUSED,
145
                  asection *sect,
146
                  void *obj ATTRIBUTE_UNUSED)
147
{
148
  return CONST_STRNEQ (sect->name, ".reg/");
149
}
150
 
151
/* this function builds a bfd target if the file is a corefile.
152
   It returns null or 0 if it finds out thaat it is not a core file.
153
   The way it checks this is by looking for allowed 'type' field values.
154
   These are declared in sys/core.h
155
   There are some values which are 'reserved for future use'. In particular
156
   CORE_NONE is actually defined as 0. This may be a catch-all for cases
157
   in which the core file is generated by some non-hpux application.
158
   (I am just guessing here!)
159
*/
160
static const bfd_target *
161
hpux_core_core_file_p (bfd *abfd)
162
{
163
  int  good_sections = 0;
164
  int  unknown_sections = 0;
165
 
166
  core_hdr (abfd) = (struct hpux_core_struct *)
167
    bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hpux_core_struct));
168
  if (!core_hdr (abfd))
169
    return NULL;
170
 
171
  while (1)
172
    {
173
      int val;
174
      struct corehead core_header;
175
 
176
      val = bfd_bread ((void *) &core_header,
177
                      (bfd_size_type) sizeof core_header, abfd);
178
      if (val <= 0)
179
        break;
180
      switch (core_header.type)
181
        {
182
        case CORE_KERNEL:
183
        case CORE_FORMAT:
184
          /* Just skip this.  */
185
          bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
186
          good_sections++;
187
          break;
188
        case CORE_EXEC:
189
          {
190
            struct proc_exec proc_exec;
191
            if (bfd_bread ((void *) &proc_exec, (bfd_size_type) core_header.len,
192
                          abfd) != core_header.len)
193
              break;
194
            strncpy (core_command (abfd), proc_exec.cmd, MAXCOMLEN + 1);
195
            good_sections++;
196
          }
197
          break;
198
        case CORE_PROC:
199
          {
200
            struct proc_info proc_info;
201
            char  secname[100];  /* Of arbitrary size, but plenty large. */
202
 
203
            /* We need to read this section, 'cause we need to determine
204
               whether the core-dumped app was threaded before we create
205
               any .reg sections. */
206
            if (bfd_bread (&proc_info, (bfd_size_type) core_header.len, abfd)
207
                != core_header.len)
208
              break;
209
 
210
              /* However, we also want to create those sections with the
211
                 file positioned at the start of the record, it seems. */
212
            if (bfd_seek (abfd, -((file_ptr) core_header.len), SEEK_CUR) != 0)
213
              break;
214
 
215
#if defined(PROC_INFO_HAS_THREAD_ID)
216
            core_kernel_thread_id (abfd) = proc_info.lwpid;
217
            core_user_thread_id (abfd) = proc_info.user_tid;
218
#else
219
            core_kernel_thread_id (abfd) = 0;
220
            core_user_thread_id (abfd) = 0;
221
#endif
222
            /* If the program was unthreaded, then we'll just create a
223
               .reg section.
224
 
225
               If the program was threaded, then we'll create .reg/XXXXX
226
               section for each thread, where XXXXX is a printable
227
               representation of the kernel thread id.  We'll also
228
               create a .reg section for the thread that was running
229
               and signalled at the time of the core-dump (i.e., this
230
               is effectively an alias, needed to keep GDB happy.)
231
 
232
               Note that we use `.reg/XXXXX' as opposed to '.regXXXXX'
233
               because GDB expects that .reg2 will be the floating-
234
               point registers. */
235
            if (core_kernel_thread_id (abfd) == 0)
236
              {
237
                if (!make_bfd_asection (abfd, ".reg",
238
                                        SEC_HAS_CONTENTS,
239
                                        core_header.len,
240
                                        (bfd_vma) offsetof (struct proc_info,
241
                                                            hw_regs),
242
                                        2))
243
                  goto fail;
244
              }
245
            else
246
              {
247
                /* There are threads.  Is this the one that caused the
248
                   core-dump?  We'll claim it was the running thread. */
249
                if (proc_info.sig != -1)
250
                  {
251
                    if (!make_bfd_asection (abfd, ".reg",
252
                                            SEC_HAS_CONTENTS,
253
                                            core_header.len,
254
                                            (bfd_vma)offsetof (struct proc_info,
255
                                                               hw_regs),
256
                                            2))
257
                      goto fail;
258
                  }
259
                /* We always make one of these sections, for every thread. */
260
                sprintf (secname, ".reg/%d", core_kernel_thread_id (abfd));
261
                if (!make_bfd_asection (abfd, secname,
262
                                        SEC_HAS_CONTENTS,
263
                                        core_header.len,
264
                                        (bfd_vma) offsetof (struct proc_info,
265
                                                            hw_regs),
266
                                        2))
267
                  goto fail;
268
              }
269
            core_signal (abfd) = proc_info.sig;
270
            if (bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR) != 0)
271
              break;
272
            good_sections++;
273
          }
274
          break;
275
 
276
        case CORE_DATA:
277
        case CORE_STACK:
278
        case CORE_TEXT:
279
        case CORE_MMF:
280
        case CORE_SHM:
281
        case CORE_ANON_SHMEM:
282
          if (!make_bfd_asection (abfd, ".data",
283
                                  SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
284
                                  core_header.len,
285
                                  (bfd_vma) core_header.addr, 2))
286
            goto fail;
287
 
288
          bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
289
          good_sections++;
290
          break;
291
 
292
        case CORE_NONE:
293
          /* Let's not punt if we encounter a section of unknown
294
             type.  Rather, let's make a note of it.  If we later
295
             see that there were also "good" sections, then we'll
296
             declare that this a core file, but we'll also warn that
297
             it may be incompatible with this gdb.
298
             */
299
          unknown_sections++;
300
          break;
301
 
302
         default:
303
           goto fail; /*unrecognized core file type */
304
        }
305
    }
306
 
307
  /* OK, we believe you.  You're a core file (sure, sure).  */
308
 
309
  /* On HP/UX, we sometimes encounter core files where none of the threads
310
     was found to be the running thread (ie the signal was set to -1 for
311
     all threads).  This happens when the program was aborted externally
312
     via a TT_CORE ttrace system call.  In that case, we just pick one
313
     thread at random to be the active thread.  */
314
  if (core_kernel_thread_id (abfd) != 0
315
      && bfd_get_section_by_name (abfd, ".reg") == NULL)
316
    {
317
      asection *asect = bfd_sections_find_if (abfd, thread_section_p, NULL);
318
      asection *reg_sect;
319
 
320
      if (asect != NULL)
321
        {
322
          reg_sect = make_bfd_asection (abfd, ".reg", asect->flags,
323
                                        asect->size, asect->vma,
324
                                        asect->alignment_power);
325
          if (reg_sect == NULL)
326
            goto fail;
327
 
328
          reg_sect->filepos = asect->filepos;
329
        }
330
    }
331
 
332
  /* Were there sections of unknown type?  If so, yet there were
333
     at least some complete sections of known type, then, issue
334
     a warning.  Possibly the core file was generated on a version
335
     of HP-UX that is incompatible with that for which this gdb was
336
     built.
337
     */
338
  if ((unknown_sections > 0) && (good_sections > 0))
339
    (*_bfd_error_handler)
340
      ("%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",
341
       abfd->filename);
342
 
343
  return abfd->xvec;
344
 
345
 fail:
346
  bfd_release (abfd, core_hdr (abfd));
347
  core_hdr (abfd) = NULL;
348
  bfd_section_list_clear (abfd);
349
  return NULL;
350
}
351
 
352
static char *
353
hpux_core_core_file_failing_command (bfd *abfd)
354
{
355
  return core_command (abfd);
356
}
357
 
358
static int
359
hpux_core_core_file_failing_signal (bfd *abfd)
360
{
361
  return core_signal (abfd);
362
}
363
 
364
 
365
/* If somebody calls any byte-swapping routines, shoot them.  */
366
static void
367
swap_abort (void)
368
{
369
  abort(); /* This way doesn't require any declaration for ANSI to fuck up */
370
}
371
 
372
#define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
373
#define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
374
#define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
375
#define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
376
#define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
377
#define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
378
 
379
const bfd_target hpux_core_vec =
380
  {
381
    "hpux-core",
382
    bfd_target_unknown_flavour,
383
    BFD_ENDIAN_BIG,             /* target byte order */
384
    BFD_ENDIAN_BIG,             /* target headers byte order */
385
    (HAS_RELOC | EXEC_P |       /* object flags */
386
     HAS_LINENO | HAS_DEBUG |
387
     HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
388
    (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
389
    0,                                                      /* symbol prefix */
390
    ' ',                                                   /* ar_pad_char */
391
    16,                                                    /* ar_max_namelen */
392
    NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data */
393
    NO_GET, NO_GETS, NO_PUT,            /* 32 bit data */
394
    NO_GET, NO_GETS, NO_PUT,            /* 16 bit data */
395
    NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs */
396
    NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs */
397
    NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs */
398
 
399
    {                           /* bfd_check_format */
400
      _bfd_dummy_target,                /* unknown format */
401
      _bfd_dummy_target,                /* object file */
402
      _bfd_dummy_target,                /* archive */
403
      hpux_core_core_file_p             /* a core file */
404
    },
405
    {                           /* bfd_set_format */
406
      bfd_false, bfd_false,
407
      bfd_false, bfd_false
408
    },
409
    {                           /* bfd_write_contents */
410
      bfd_false, bfd_false,
411
      bfd_false, bfd_false
412
    },
413
 
414
    BFD_JUMP_TABLE_GENERIC (_bfd_generic),
415
    BFD_JUMP_TABLE_COPY (_bfd_generic),
416
    BFD_JUMP_TABLE_CORE (hpux_core),
417
    BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
418
    BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
419
    BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
420
    BFD_JUMP_TABLE_WRITE (_bfd_generic),
421
    BFD_JUMP_TABLE_LINK (_bfd_nolink),
422
    BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
423
 
424
    NULL,
425
 
426
    (PTR) 0                      /* backend_data */
427
  };

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