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[/] [or1k/] [branches/] [oc/] [gdb-5.0/] [bfd/] [hpux-core.c] - Blame information for rev 1765

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1 104 markom
/* BFD back-end for HP/UX core files.
2
   Copyright 1993, 94, 95, 96, 97, 1998 Free Software Foundation, Inc.
3
   Written by Stu Grossman, Cygnus Support.
4
   Converted to back-end form by Ian Lance Taylor, Cygnus SUpport
5
 
6
This file is part of BFD, the Binary File Descriptor library.
7
 
8
This program is free software; you can redistribute it and/or modify
9
it under the terms of the GNU General Public License as published by
10
the Free Software Foundation; either version 2 of the License, or
11
(at your option) any later version.
12
 
13
This program is distributed in the hope that it will be useful,
14
but WITHOUT ANY WARRANTY; without even the implied warranty of
15
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16
GNU General Public License for more details.
17
 
18
You should have received a copy of the GNU General Public License
19
along with this program; if not, write to the Free Software
20
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
21
 
22
/* This file can only be compiled on systems which use HP/UX style
23
   core files.  */
24
 
25
#include "bfd.h"
26
#include "sysdep.h"
27
#include "libbfd.h"
28
 
29
#if defined (HOST_HPPAHPUX) || defined (HOST_HP300HPUX) || defined (HOST_HPPAMPEIX)
30
 
31
/* FIXME: sys/core.h doesn't exist for HPUX version 7.  HPUX version
32
   5, 6, and 7 core files seem to be standard trad-core.c type core
33
   files; can we just use trad-core.c in addition to this file?  */
34
 
35
#include <sys/core.h>
36
#include <sys/utsname.h>
37
 
38
#endif /* HOST_HPPAHPUX */
39
 
40
#ifdef HOST_HPPABSD
41
 
42
/* Not a very swift place to put it, but that's where the BSD port
43
   puts them.  */
44
#include "/hpux/usr/include/sys/core.h"
45
 
46
#endif /* HOST_HPPABSD */
47
 
48
#include <sys/param.h>
49
#ifdef HAVE_DIRENT_H
50
# include <dirent.h>
51
#else
52
# ifdef HAVE_SYS_NDIR_H
53
#  include <sys/ndir.h>
54
# endif
55
# ifdef HAVE_SYS_DIR_H
56
#  include <sys/dir.h>
57
# endif
58
# ifdef HAVE_NDIR_H
59
#  include <ndir.h>
60
# endif
61
#endif
62
#include <signal.h>
63
#include <machine/reg.h>
64
#include <sys/user.h>           /* After a.out.h  */
65
#include <sys/file.h>
66
 
67
/* Kludge: There's no explicit mechanism provided by sys/core.h to
68
   conditionally know whether a proc_info has thread id fields.
69
   However, CORE_ANON_SHMEM shows up first at 10.30, which is
70
   happily also when meaningful thread id's show up in proc_info. */
71
#if defined(CORE_ANON_SHMEM)
72
#define PROC_INFO_HAS_THREAD_ID (1)
73
#endif
74
 
75
/* This type appears at HP-UX 10.30.  Defining it if not defined
76
   by sys/core.h allows us to build for older HP-UX's, and (since
77
   it won't be encountered in core-dumps from older HP-UX's) is
78
   harmless. */
79
#if !defined(CORE_ANON_SHMEM)
80
#define CORE_ANON_SHMEM 0x00000200         /* anonymous shared memory */
81
#endif
82
 
83
/* These are stored in the bfd's tdata */
84
 
85
/* .lwpid and .user_tid are only valid if PROC_INFO_HAS_THREAD_ID, else they
86
   are set to 0.  Also, until HP-UX implements MxN threads, .user_tid and
87
   .lwpid are synonymous. */
88
struct hpux_core_struct
89
{
90
  int sig;
91
  int lwpid;               /* Kernel thread ID. */
92
  unsigned long user_tid;  /* User thread ID. */
93
  char cmd[MAXCOMLEN + 1];
94
};
95
 
96
#define core_hdr(bfd) ((bfd)->tdata.hpux_core_data)
97
#define core_signal(bfd) (core_hdr(bfd)->sig)
98
#define core_command(bfd) (core_hdr(bfd)->cmd)
99
#define core_kernel_thread_id(bfd) (core_hdr(bfd)->lwpid)
100
#define core_user_thread_id(bfd) (core_hdr(bfd)->user_tid)
101
 
102
static void swap_abort PARAMS ((void));
103
 
104
static asection *
105
make_bfd_asection (abfd, name, flags, _raw_size, vma, alignment_power)
106
     bfd *abfd;
107
     CONST char *name;
108
     flagword flags;
109
     bfd_size_type _raw_size;
110
     bfd_vma vma;
111
     unsigned int alignment_power;
112
{
113
  asection *asect;
114
  char *newname;
115
 
116
  newname = bfd_alloc (abfd, strlen (name) + 1);
117
  if (!newname)
118
    return NULL;
119
 
120
  strcpy (newname, name);
121
 
122
  asect = bfd_make_section_anyway (abfd, newname);
123
  if (!asect)
124
    return NULL;
125
 
126
  asect->flags = flags;
127
  asect->_raw_size = _raw_size;
128
  asect->vma = vma;
129
  asect->filepos = bfd_tell (abfd);
130
  asect->alignment_power = alignment_power;
131
 
132
  return asect;
133
}
134
 
135
static asymbol *
136
hpux_core_make_empty_symbol (abfd)
137
     bfd *abfd;
138
{
139
  asymbol *new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol));
140
  if (new)
141
    new->the_bfd = abfd;
142
  return new;
143
}
144
 
145
 
146
/* this function builds a bfd target if the file is a corefile.
147
   It returns null or 0 if it finds out thaat it is not a core file.
148
   The way it checks this is by looking for allowed 'type' field values.
149
   These are declared in sys/core.h
150
   There are some values which are 'reserved for future use'. In particular
151
   CORE_NONE is actually defined as 0. This may be a catch-all for cases
152
   in which the core file is generated by some non-hpux application.
153
   (I am just guessing here!)
154
*/
155
static const bfd_target *
156
hpux_core_core_file_p (abfd)
157
     bfd *abfd;
158
{
159
  int  good_sections = 0;
160
  int  unknown_sections = 0;
161
 
162
  core_hdr (abfd) = (struct hpux_core_struct *)
163
    bfd_zalloc (abfd, sizeof (struct hpux_core_struct));
164
  if (!core_hdr (abfd))
165
    return NULL;
166
 
167
  while (1)
168
    {
169
      int val;
170
      struct corehead core_header;
171
 
172
      val = bfd_read ((void *) &core_header, 1, sizeof core_header, abfd);
173
      if (val <= 0)
174
        break;
175
      switch (core_header.type)
176
        {
177
        case CORE_KERNEL:
178
        case CORE_FORMAT:
179
          bfd_seek (abfd, core_header.len, SEEK_CUR);   /* Just skip this */
180
          good_sections++;
181
          break;
182
        case CORE_EXEC:
183
          {
184
            struct proc_exec proc_exec;
185
            if (bfd_read ((void *) &proc_exec, 1, core_header.len, abfd)
186
                != core_header.len)
187
              break;
188
            strncpy (core_command (abfd), proc_exec.cmd, MAXCOMLEN + 1);
189
            good_sections++;
190
          }
191
          break;
192
        case CORE_PROC:
193
          {
194
            struct proc_info proc_info;
195
            char  secname[100];  /* Of arbitrary size, but plenty large. */
196
 
197
            /* We need to read this section, 'cause we need to determine
198
               whether the core-dumped app was threaded before we create
199
               any .reg sections. */
200
            if (bfd_read (&proc_info, 1, core_header.len, abfd)
201
                != core_header.len)
202
              break;
203
 
204
              /* However, we also want to create those sections with the
205
                 file positioned at the start of the record, it seems. */
206
            if (bfd_seek (abfd, -core_header.len, SEEK_CUR) != 0)
207
              break;
208
 
209
#if defined(PROC_INFO_HAS_THREAD_ID)
210
            core_kernel_thread_id (abfd) = proc_info.lwpid;
211
            core_user_thread_id (abfd) = proc_info.user_tid;
212
#else
213
            core_kernel_thread_id (abfd) = 0;
214
            core_user_thread_id (abfd) = 0;
215
#endif
216
            /* If the program was unthreaded, then we'll just create a
217
               .reg section.
218
 
219
               If the program was threaded, then we'll create .reg/XXXXX
220
               section for each thread, where XXXXX is a printable
221
               representation of the kernel thread id.  We'll also
222
               create a .reg section for the thread that was running
223
               and signalled at the time of the core-dump (i.e., this
224
               is effectively an alias, needed to keep GDB happy.)
225
 
226
               Note that we use `.reg/XXXXX' as opposed to '.regXXXXX'
227
               because GDB expects that .reg2 will be the floating-
228
               point registers. */
229
            if (core_kernel_thread_id (abfd) == 0)
230
              {
231
                if (!make_bfd_asection (abfd, ".reg",
232
                                        SEC_HAS_CONTENTS,
233
                                        core_header.len,
234
                                        (int) &proc_info - (int) & proc_info.hw_regs,
235
                                        2))
236
                  return NULL;
237
              }
238
            else
239
              {
240
                /* There are threads.  Is this the one that caused the
241
                   core-dump?  We'll claim it was the running thread. */
242
                if (proc_info.sig != -1)
243
                  {
244
                    if (!make_bfd_asection (abfd, ".reg",
245
                                            SEC_HAS_CONTENTS,
246
                                            core_header.len,
247
                                            (int) &proc_info - (int) & proc_info.hw_regs,
248
                                            2))
249
                      return NULL;
250
                  }
251
                /* We always make one of these sections, for every thread. */
252
                sprintf (secname, ".reg/%d", core_kernel_thread_id (abfd));
253
                if (!make_bfd_asection (abfd, secname,
254
                                        SEC_HAS_CONTENTS,
255
                                        core_header.len,
256
                                        (int) &proc_info - (int) & proc_info.hw_regs,
257
                                        2))
258
                  return NULL;
259
              }
260
            core_signal (abfd) = proc_info.sig;
261
            if (bfd_seek (abfd, core_header.len, SEEK_CUR) != 0)
262
              break;
263
            good_sections++;
264
          }
265
          break;
266
 
267
        case CORE_DATA:
268
        case CORE_STACK:
269
        case CORE_TEXT:
270
        case CORE_MMF:
271
        case CORE_SHM:
272
        case CORE_ANON_SHMEM:
273
          if (!make_bfd_asection (abfd, ".data",
274
                                  SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
275
                                  core_header.len, core_header.addr, 2))
276
            return NULL;
277
 
278
          bfd_seek (abfd, core_header.len, SEEK_CUR);
279
          good_sections++;
280
          break;
281
 
282
        case CORE_NONE:
283
          /* Let's not punt if we encounter a section of unknown
284
             type.  Rather, let's make a note of it.  If we later
285
             see that there were also "good" sections, then we'll
286
             declare that this a core file, but we'll also warn that
287
             it may be incompatible with this gdb.
288
             */
289
          unknown_sections++;
290
          break;
291
 
292
         default: return 0; /*unrecognized core file type */
293
        }
294
    }
295
 
296
  /* OK, we believe you.  You're a core file (sure, sure).  */
297
 
298
  /* Were there sections of unknown type?  If so, yet there were
299
     at least some complete sections of known type, then, issue
300
     a warning.  Possibly the core file was generated on a version
301
     of HP-UX that is incompatible with that for which this gdb was
302
     built.
303
     */
304
  if ((unknown_sections > 0) && (good_sections > 0))
305
    (*_bfd_error_handler)
306
      ("%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",
307
       abfd->filename);
308
 
309
  return abfd->xvec;
310
}
311
 
312
static char *
313
hpux_core_core_file_failing_command (abfd)
314
     bfd *abfd;
315
{
316
  return core_command (abfd);
317
}
318
 
319
/* ARGSUSED */
320
static int
321
hpux_core_core_file_failing_signal (abfd)
322
     bfd *abfd;
323
{
324
  return core_signal (abfd);
325
}
326
 
327
/* ARGSUSED */
328
static boolean
329
hpux_core_core_file_matches_executable_p (core_bfd, exec_bfd)
330
     bfd *core_bfd, *exec_bfd;
331
{
332
  return true;                  /* FIXME, We have no way of telling at this point */
333
}
334
 
335
#define hpux_core_get_symtab_upper_bound _bfd_nosymbols_get_symtab_upper_bound
336
#define hpux_core_get_symtab _bfd_nosymbols_get_symtab
337
#define hpux_core_print_symbol _bfd_nosymbols_print_symbol
338
#define hpux_core_get_symbol_info _bfd_nosymbols_get_symbol_info
339
#define hpux_core_bfd_is_local_label_name \
340
  _bfd_nosymbols_bfd_is_local_label_name
341
#define hpux_core_get_lineno _bfd_nosymbols_get_lineno
342
#define hpux_core_find_nearest_line _bfd_nosymbols_find_nearest_line
343
#define hpux_core_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
344
#define hpux_core_read_minisymbols _bfd_nosymbols_read_minisymbols
345
#define hpux_core_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol
346
 
347
/* If somebody calls any byte-swapping routines, shoot them.  */
348
static void
349
swap_abort()
350
{
351
  abort(); /* This way doesn't require any declaration for ANSI to fuck up */
352
}
353
#define NO_GET  ((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
354
#define NO_PUT  ((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
355
#define NO_SIGNED_GET \
356
  ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
357
 
358
const bfd_target hpux_core_vec =
359
  {
360
    "hpux-core",
361
    bfd_target_unknown_flavour,
362
    BFD_ENDIAN_BIG,             /* target byte order */
363
    BFD_ENDIAN_BIG,             /* target headers byte order */
364
    (HAS_RELOC | EXEC_P |       /* object flags */
365
     HAS_LINENO | HAS_DEBUG |
366
     HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
367
    (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
368
    0,                                                      /* symbol prefix */
369
    ' ',                                                   /* ar_pad_char */
370
    16,                                                    /* ar_max_namelen */
371
    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit data */
372
    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit data */
373
    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit data */
374
    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 64 bit hdrs */
375
    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 32 bit hdrs */
376
    NO_GET, NO_SIGNED_GET, NO_PUT,      /* 16 bit hdrs */
377
 
378
    {                           /* bfd_check_format */
379
     _bfd_dummy_target,         /* unknown format */
380
     _bfd_dummy_target,         /* object file */
381
     _bfd_dummy_target,         /* archive */
382
     hpux_core_core_file_p      /* a core file */
383
    },
384
    {                           /* bfd_set_format */
385
     bfd_false, bfd_false,
386
     bfd_false, bfd_false
387
    },
388
    {                           /* bfd_write_contents */
389
     bfd_false, bfd_false,
390
     bfd_false, bfd_false
391
    },
392
 
393
       BFD_JUMP_TABLE_GENERIC (_bfd_generic),
394
       BFD_JUMP_TABLE_COPY (_bfd_generic),
395
       BFD_JUMP_TABLE_CORE (hpux_core),
396
       BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
397
       BFD_JUMP_TABLE_SYMBOLS (hpux_core),
398
       BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
399
       BFD_JUMP_TABLE_WRITE (_bfd_generic),
400
       BFD_JUMP_TABLE_LINK (_bfd_nolink),
401
       BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
402
 
403
    NULL,
404
 
405
    (PTR) 0                      /* backend_data */
406
};

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