aboutsummaryrefslogtreecommitdiff
path: root/bfd/hpux-core.c
blob: b4869fc82419f51b06ef4b8869a3af0bd80d7294 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
/* BFD back-end for HP/UX core files.
   Copyright 1993, 1994, 1996, 1998, 1999, 2001, 2002
   Free Software Foundation, Inc.
   Written by Stu Grossman, Cygnus Support.
   Converted to back-end form by Ian Lance Taylor, Cygnus SUpport

This file is part of BFD, the Binary File Descriptor library.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* This file can only be compiled on systems which use HP/UX style
   core files.  */

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"

#if defined (HOST_HPPAHPUX) || defined (HOST_HP300HPUX) || defined (HOST_HPPAMPEIX)

/* FIXME: sys/core.h doesn't exist for HPUX version 7.  HPUX version
   5, 6, and 7 core files seem to be standard trad-core.c type core
   files; can we just use trad-core.c in addition to this file?  */

#include <sys/core.h>
#include <sys/utsname.h>

#endif /* HOST_HPPAHPUX */

#ifdef HOST_HPPABSD

/* Not a very swift place to put it, but that's where the BSD port
   puts them.  */
#include "/hpux/usr/include/sys/core.h"

#endif /* HOST_HPPABSD */

#include <sys/param.h>
#ifdef HAVE_DIRENT_H
# include <dirent.h>
#else
# ifdef HAVE_SYS_NDIR_H
#  include <sys/ndir.h>
# endif
# ifdef HAVE_SYS_DIR_H
#  include <sys/dir.h>
# endif
# ifdef HAVE_NDIR_H
#  include <ndir.h>
# endif
#endif
#include <signal.h>
#include <machine/reg.h>
#include <sys/user.h>		/* After a.out.h  */
#include <sys/file.h>

/* Kludge: There's no explicit mechanism provided by sys/core.h to
   conditionally know whether a proc_info has thread id fields.
   However, CORE_ANON_SHMEM shows up first at 10.30, which is
   happily also when meaningful thread id's show up in proc_info. */
#if defined(CORE_ANON_SHMEM)
#define PROC_INFO_HAS_THREAD_ID (1)
#endif

/* This type appears at HP-UX 10.30.  Defining it if not defined
   by sys/core.h allows us to build for older HP-UX's, and (since
   it won't be encountered in core-dumps from older HP-UX's) is
   harmless. */
#if !defined(CORE_ANON_SHMEM)
#define CORE_ANON_SHMEM 0x00000200         /* anonymous shared memory */
#endif

/* These are stored in the bfd's tdata */

/* .lwpid and .user_tid are only valid if PROC_INFO_HAS_THREAD_ID, else they
   are set to 0.  Also, until HP-UX implements MxN threads, .user_tid and
   .lwpid are synonymous. */
struct hpux_core_struct
{
  int sig;
  int lwpid;               /* Kernel thread ID. */
  unsigned long user_tid;  /* User thread ID. */
  char cmd[MAXCOMLEN + 1];
};

#define core_hdr(bfd) ((bfd)->tdata.hpux_core_data)
#define core_signal(bfd) (core_hdr(bfd)->sig)
#define core_command(bfd) (core_hdr(bfd)->cmd)
#define core_kernel_thread_id(bfd) (core_hdr(bfd)->lwpid)
#define core_user_thread_id(bfd) (core_hdr(bfd)->user_tid)

static asection *make_bfd_asection
  PARAMS ((bfd *, const char *, flagword, bfd_size_type, bfd_vma,
	   unsigned int));
static const bfd_target *hpux_core_core_file_p
  PARAMS ((bfd *));
static char *hpux_core_core_file_failing_command
  PARAMS ((bfd *));
static int hpux_core_core_file_failing_signal
  PARAMS ((bfd *));
static bfd_boolean hpux_core_core_file_matches_executable_p
  PARAMS ((bfd *, bfd *));
static void swap_abort
  PARAMS ((void));

static asection *
make_bfd_asection (abfd, name, flags, _raw_size, vma, alignment_power)
     bfd *abfd;
     const char *name;
     flagword flags;
     bfd_size_type _raw_size;
     bfd_vma vma;
     unsigned int alignment_power;
{
  asection *asect;
  char *newname;

  newname = bfd_alloc (abfd, (bfd_size_type) strlen (name) + 1);
  if (!newname)
    return NULL;

  strcpy (newname, name);

  asect = bfd_make_section_anyway (abfd, newname);
  if (!asect)
    return NULL;

  asect->flags = flags;
  asect->_raw_size = _raw_size;
  asect->vma = vma;
  asect->filepos = bfd_tell (abfd);
  asect->alignment_power = alignment_power;

  return asect;
}

/* this function builds a bfd target if the file is a corefile.
   It returns null or 0 if it finds out thaat it is not a core file.
   The way it checks this is by looking for allowed 'type' field values.
   These are declared in sys/core.h
   There are some values which are 'reserved for future use'. In particular
   CORE_NONE is actually defined as 0. This may be a catch-all for cases
   in which the core file is generated by some non-hpux application.
   (I am just guessing here!)
*/
static const bfd_target *
hpux_core_core_file_p (abfd)
     bfd *abfd;
{
  int  good_sections = 0;
  int  unknown_sections = 0;

  core_hdr (abfd) = (struct hpux_core_struct *)
    bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hpux_core_struct));
  if (!core_hdr (abfd))
    return NULL;

  while (1)
    {
      int val;
      struct corehead core_header;

      val = bfd_bread ((void *) &core_header,
		      (bfd_size_type) sizeof core_header, abfd);
      if (val <= 0)
	break;
      switch (core_header.type)
	{
	case CORE_KERNEL:
	case CORE_FORMAT:
	  /* Just skip this.  */
	  bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
          good_sections++;
	  break;
	case CORE_EXEC:
	  {
	    struct proc_exec proc_exec;
	    if (bfd_bread ((void *) &proc_exec, (bfd_size_type) core_header.len,
			  abfd) != core_header.len)
	      break;
	    strncpy (core_command (abfd), proc_exec.cmd, MAXCOMLEN + 1);
            good_sections++;
	  }
	  break;
	case CORE_PROC:
	  {
	    struct proc_info proc_info;
	    char  secname[100];  /* Of arbitrary size, but plenty large. */

            /* We need to read this section, 'cause we need to determine
               whether the core-dumped app was threaded before we create
               any .reg sections. */
	    if (bfd_bread (&proc_info, (bfd_size_type) core_header.len, abfd)
		!= core_header.len)
	      break;

              /* However, we also want to create those sections with the
                 file positioned at the start of the record, it seems. */
            if (bfd_seek (abfd, (file_ptr) -core_header.len, SEEK_CUR) != 0)
              break;

#if defined(PROC_INFO_HAS_THREAD_ID)
            core_kernel_thread_id (abfd) = proc_info.lwpid;
            core_user_thread_id (abfd) = proc_info.user_tid;
#else
            core_kernel_thread_id (abfd) = 0;
            core_user_thread_id (abfd) = 0;
#endif
            /* If the program was unthreaded, then we'll just create a
               .reg section.

               If the program was threaded, then we'll create .reg/XXXXX
               section for each thread, where XXXXX is a printable
               representation of the kernel thread id.  We'll also
               create a .reg section for the thread that was running
               and signalled at the time of the core-dump (i.e., this
               is effectively an alias, needed to keep GDB happy.)

               Note that we use `.reg/XXXXX' as opposed to '.regXXXXX'
               because GDB expects that .reg2 will be the floating-
               point registers. */
            if (core_kernel_thread_id (abfd) == 0)
              {
                if (!make_bfd_asection (abfd, ".reg",
                                        SEC_HAS_CONTENTS,
                                        core_header.len,
                                        (int) &proc_info - (int) & proc_info.hw_regs,
                                        2))
		  goto fail;
              }
            else
              {
                /* There are threads.  Is this the one that caused the
                   core-dump?  We'll claim it was the running thread. */
                if (proc_info.sig != -1)
                  {
		    if (!make_bfd_asection (abfd, ".reg",
					    SEC_HAS_CONTENTS,
					    core_header.len,
					    (int) &proc_info - (int) & proc_info.hw_regs,
					    2))
		      goto fail;
                  }
                /* We always make one of these sections, for every thread. */
                sprintf (secname, ".reg/%d", core_kernel_thread_id (abfd));
                if (!make_bfd_asection (abfd, secname,
                                        SEC_HAS_CONTENTS,
                                        core_header.len,
                                        (int) &proc_info - (int) & proc_info.hw_regs,
                                        2))
		  goto fail;
              }
	    core_signal (abfd) = proc_info.sig;
            if (bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR) != 0)
              break;
            good_sections++;
	  }
	  break;

	case CORE_DATA:
	case CORE_STACK:
	case CORE_TEXT:
	case CORE_MMF:
	case CORE_SHM:
	case CORE_ANON_SHMEM:
	  if (!make_bfd_asection (abfd, ".data",
				  SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
				  core_header.len, core_header.addr, 2))
	    goto fail;

	  bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
          good_sections++;
	  break;

	case CORE_NONE:
          /* Let's not punt if we encounter a section of unknown
             type.  Rather, let's make a note of it.  If we later
             see that there were also "good" sections, then we'll
             declare that this a core file, but we'll also warn that
             it may be incompatible with this gdb.
             */
	  unknown_sections++;
          break;

         default:
	   goto fail; /*unrecognized core file type */
	}
    }

  /* OK, we believe you.  You're a core file (sure, sure).  */

  /* Were there sections of unknown type?  If so, yet there were
     at least some complete sections of known type, then, issue
     a warning.  Possibly the core file was generated on a version
     of HP-UX that is incompatible with that for which this gdb was
     built.
     */
  if ((unknown_sections > 0) && (good_sections > 0))
    (*_bfd_error_handler)
      ("%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",
       abfd->filename);

  return abfd->xvec;

 fail:
  bfd_release (abfd, core_hdr (abfd));
  core_hdr (abfd) = NULL;
  bfd_section_list_clear (abfd);
  return NULL;
}

static char *
hpux_core_core_file_failing_command (abfd)
     bfd *abfd;
{
  return core_command (abfd);
}

/* ARGSUSED */
static int
hpux_core_core_file_failing_signal (abfd)
     bfd *abfd;
{
  return core_signal (abfd);
}

/* ARGSUSED */
static bfd_boolean
hpux_core_core_file_matches_executable_p (core_bfd, exec_bfd)
     bfd *core_bfd ATTRIBUTE_UNUSED;
     bfd *exec_bfd ATTRIBUTE_UNUSED;
{
  return TRUE;			/* FIXME, We have no way of telling at this point */
}

/* If somebody calls any byte-swapping routines, shoot them.  */
static void
swap_abort ()
{
  abort(); /* This way doesn't require any declaration for ANSI to fuck up */
}
#define	NO_GET	((bfd_vma (*) PARAMS ((   const bfd_byte *))) swap_abort )
#define	NO_PUT	((void    (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
#define	NO_SIGNED_GET \
  ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )

const bfd_target hpux_core_vec =
  {
    "hpux-core",
    bfd_target_unknown_flavour,
    BFD_ENDIAN_BIG,		/* target byte order */
    BFD_ENDIAN_BIG,		/* target headers byte order */
    (HAS_RELOC | EXEC_P |	/* object flags */
     HAS_LINENO | HAS_DEBUG |
     HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
    (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
    0,			                                   /* symbol prefix */
    ' ',						   /* ar_pad_char */
    16,							   /* ar_max_namelen */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 64 bit data */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 32 bit data */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 16 bit data */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 64 bit hdrs */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 32 bit hdrs */
    NO_GET, NO_SIGNED_GET, NO_PUT,	/* 16 bit hdrs */

    {				/* bfd_check_format */
     _bfd_dummy_target,		/* unknown format */
     _bfd_dummy_target,		/* object file */
     _bfd_dummy_target,		/* archive */
     hpux_core_core_file_p	/* a core file */
    },
    {				/* bfd_set_format */
     bfd_false, bfd_false,
     bfd_false, bfd_false
    },
    {				/* bfd_write_contents */
     bfd_false, bfd_false,
     bfd_false, bfd_false
    },

    BFD_JUMP_TABLE_GENERIC (_bfd_generic),
    BFD_JUMP_TABLE_COPY (_bfd_generic),
    BFD_JUMP_TABLE_CORE (hpux_core),
    BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
    BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
    BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
    BFD_JUMP_TABLE_WRITE (_bfd_generic),
    BFD_JUMP_TABLE_LINK (_bfd_nolink),
    BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

    NULL,

    (PTR) 0			/* backend_data */
};