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

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1 205 julius
/* BFD back end for traditional Unix core files (U-area and raw sections)
2
   Copyright 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999,
3
   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
4
   Free Software Foundation, Inc.
5
   Written by John Gilmore of 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
#include "sysdep.h"
25
#include "bfd.h"
26
#include "libbfd.h"
27
#include "libaout.h"           /* BFD a.out internal data structures */
28
 
29
#include <sys/param.h>
30
#ifdef HAVE_DIRENT_H
31
# include <dirent.h>
32
#else
33
# ifdef HAVE_SYS_NDIR_H
34
#  include <sys/ndir.h>
35
# endif
36
# ifdef HAVE_SYS_DIR_H
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#  include <sys/dir.h>
38
# endif
39
# ifdef HAVE_NDIR_H
40
#  include <ndir.h>
41
# endif
42
#endif
43
#include <signal.h>
44
 
45
#include <sys/user.h>           /* After a.out.h  */
46
 
47
#ifdef TRAD_HEADER
48
#include TRAD_HEADER
49
#endif
50
 
51
#ifndef NBPG
52
# define NBPG getpagesize()
53
#endif
54
 
55
struct trad_core_struct
56
{
57
  asection *data_section;
58
  asection *stack_section;
59
  asection *reg_section;
60
  struct user u;
61
};
62
 
63
#define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
64
#define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
65
#define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
66
#define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)
67
 
68
/* forward declarations */
69
 
70
const bfd_target *trad_unix_core_file_p PARAMS ((bfd *abfd));
71
char * trad_unix_core_file_failing_command PARAMS ((bfd *abfd));
72
int trad_unix_core_file_failing_signal PARAMS ((bfd *abfd));
73
#define trad_unix_core_file_matches_executable_p generic_core_file_matches_executable_p
74
static void swap_abort PARAMS ((void));
75
 
76
/* Handle 4.2-style (and perhaps also sysV-style) core dump file.  */
77
 
78
const bfd_target *
79
trad_unix_core_file_p (abfd)
80
     bfd *abfd;
81
 
82
{
83
  int val;
84
  struct user u;
85
  struct trad_core_struct *rawptr;
86
  bfd_size_type amt;
87
  flagword flags;
88
 
89
#ifdef TRAD_CORE_USER_OFFSET
90
  /* If defined, this macro is the file position of the user struct.  */
91
  if (bfd_seek (abfd, (file_ptr) TRAD_CORE_USER_OFFSET, SEEK_SET) != 0)
92
    return 0;
93
#endif
94
 
95
  val = bfd_bread ((void *) &u, (bfd_size_type) sizeof u, abfd);
96
  if (val != sizeof u)
97
    {
98
      /* Too small to be a core file */
99
      bfd_set_error (bfd_error_wrong_format);
100
      return 0;
101
    }
102
 
103
  /* Sanity check perhaps??? */
104
  if (u.u_dsize > 0x1000000)    /* Remember, it's in pages...  */
105
    {
106
      bfd_set_error (bfd_error_wrong_format);
107
      return 0;
108
    }
109
  if (u.u_ssize > 0x1000000)
110
    {
111
      bfd_set_error (bfd_error_wrong_format);
112
      return 0;
113
    }
114
 
115
  /* Check that the size claimed is no greater than the file size.  */
116
  {
117
    struct stat statbuf;
118
 
119
    if (bfd_stat (abfd, &statbuf) < 0)
120
      return 0;
121
 
122
    if ((ufile_ptr) NBPG * (UPAGES + u.u_dsize
123
#ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
124
                            - u.u_tsize
125
#endif
126
                            + u.u_ssize)
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        > (ufile_ptr) statbuf.st_size)
128
      {
129
        bfd_set_error (bfd_error_wrong_format);
130
        return 0;
131
      }
132
#ifndef TRAD_CORE_ALLOW_ANY_EXTRA_SIZE
133
    if (((ufile_ptr) NBPG * (UPAGES + u.u_dsize + u.u_ssize)
134
#ifdef TRAD_CORE_EXTRA_SIZE_ALLOWED
135
        /* Some systems write the file too big.  */
136
         + TRAD_CORE_EXTRA_SIZE_ALLOWED
137
#endif
138
         )
139
        < (ufile_ptr) statbuf.st_size)
140
      {
141
        /* The file is too big.  Maybe it's not a core file
142
           or we otherwise have bad values for u_dsize and u_ssize).  */
143
        bfd_set_error (bfd_error_wrong_format);
144
        return 0;
145
      }
146
#endif
147
  }
148
 
149
  /* OK, we believe you.  You're a core file (sure, sure).  */
150
 
151
  /* Allocate both the upage and the struct core_data at once, so
152
     a single free() will free them both.  */
153
  amt = sizeof (struct trad_core_struct);
154
  rawptr = (struct trad_core_struct *) bfd_zmalloc (amt);
155
  if (rawptr == NULL)
156
    return 0;
157
 
158
  abfd->tdata.trad_core_data = rawptr;
159
 
160
  rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */
161
 
162
  /* Create the sections.  */
163
 
164
  flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
165
  core_stacksec(abfd) = bfd_make_section_anyway_with_flags (abfd, ".stack",
166
                                                            flags);
167
  if (core_stacksec (abfd) == NULL)
168
    goto fail;
169
  core_datasec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".data",
170
                                                            flags);
171
  if (core_datasec (abfd) == NULL)
172
    goto fail;
173
  core_regsec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".reg",
174
                                                           SEC_HAS_CONTENTS);
175
  if (core_regsec (abfd) == NULL)
176
    goto fail;
177
 
178
  core_datasec (abfd)->size =  NBPG * u.u_dsize
179
#ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
180
    - NBPG * u.u_tsize
181
#endif
182
      ;
183
  core_stacksec (abfd)->size = NBPG * u.u_ssize;
184
  core_regsec (abfd)->size = NBPG * UPAGES; /* Larger than sizeof struct u */
185
 
186
  /* What a hack... we'd like to steal it from the exec file,
187
     since the upage does not seem to provide it.  FIXME.  */
188
#ifdef HOST_DATA_START_ADDR
189
  core_datasec (abfd)->vma = HOST_DATA_START_ADDR;
190
#else
191
  core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize);
192
#endif
193
 
194
#ifdef HOST_STACK_START_ADDR
195
  core_stacksec (abfd)->vma = HOST_STACK_START_ADDR;
196
#else
197
  core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize);
198
#endif
199
 
200
  /* This is tricky.  As the "register section", we give them the entire
201
     upage and stack.  u.u_ar0 points to where "register 0" is stored.
202
     There are two tricks with this, though.  One is that the rest of the
203
     registers might be at positive or negative (or both) displacements
204
     from *u_ar0.  The other is that u_ar0 is sometimes an absolute address
205
     in kernel memory, and on other systems it is an offset from the beginning
206
     of the `struct user'.
207
 
208
     As a practical matter, we don't know where the registers actually are,
209
     so we have to pass the whole area to GDB.  We encode the value of u_ar0
210
     by setting the .regs section up so that its virtual memory address
211
 
212
     of the section to -u_ar0).  GDB uses this info to locate the regs,
213
     using minor trickery to get around the offset-or-absolute-addr problem.  */
214
  core_regsec (abfd)->vma = - (bfd_vma) (unsigned long) u.u_ar0;
215
 
216
  core_datasec (abfd)->filepos = NBPG * UPAGES;
217
  core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize
218
#ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
219
    - NBPG * u.u_tsize
220
#endif
221
      ;
222
  core_regsec (abfd)->filepos = 0; /* Register segment is the upage */
223
 
224
  /* Align to word at least */
225
  core_stacksec (abfd)->alignment_power = 2;
226
  core_datasec (abfd)->alignment_power = 2;
227
  core_regsec (abfd)->alignment_power = 2;
228
 
229
  return abfd->xvec;
230
 
231
 fail:
232
  bfd_release (abfd, abfd->tdata.any);
233
  abfd->tdata.any = NULL;
234
  bfd_section_list_clear (abfd);
235
  return NULL;
236
}
237
 
238
char *
239
trad_unix_core_file_failing_command (abfd)
240
     bfd *abfd;
241
{
242
#ifndef NO_CORE_COMMAND
243
  char *com = abfd->tdata.trad_core_data->u.u_comm;
244
  if (*com)
245
    return com;
246
  else
247
#endif
248
    return 0;
249
}
250
 
251
int
252
trad_unix_core_file_failing_signal (ignore_abfd)
253
     bfd *ignore_abfd ATTRIBUTE_UNUSED;
254
{
255
#ifdef TRAD_UNIX_CORE_FILE_FAILING_SIGNAL
256
  return TRAD_UNIX_CORE_FILE_FAILING_SIGNAL(ignore_abfd);
257
#else
258
  return -1;            /* FIXME, where is it? */
259
#endif
260
}
261
 
262
/* If somebody calls any byte-swapping routines, shoot them.  */
263
static void
264
swap_abort ()
265
{
266
  abort (); /* This way doesn't require any declaration for ANSI to fuck up */
267
}
268
 
269
#define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
270
#define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
271
#define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
272
#define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
273
#define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
274
#define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
275
 
276
const bfd_target trad_core_vec =
277
  {
278
    "trad-core",
279
    bfd_target_unknown_flavour,
280
    BFD_ENDIAN_UNKNOWN,         /* target byte order */
281
    BFD_ENDIAN_UNKNOWN,         /* target headers byte order */
282
    (HAS_RELOC | EXEC_P |       /* object flags */
283
     HAS_LINENO | HAS_DEBUG |
284
     HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
285
    (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
286
    0,                                                      /* symbol prefix */
287
    ' ',                                                   /* ar_pad_char */
288
    16,                                                    /* ar_max_namelen */
289
    NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit data */
290
    NO_GET, NO_GETS, NO_PUT,            /* 32 bit data */
291
    NO_GET, NO_GETS, NO_PUT,            /* 16 bit data */
292
    NO_GET64, NO_GETS64, NO_PUT64,      /* 64 bit hdrs */
293
    NO_GET, NO_GETS, NO_PUT,            /* 32 bit hdrs */
294
    NO_GET, NO_GETS, NO_PUT,            /* 16 bit hdrs */
295
 
296
    {                           /* bfd_check_format */
297
      _bfd_dummy_target,                /* unknown format */
298
      _bfd_dummy_target,                /* object file */
299
      _bfd_dummy_target,                /* archive */
300
      trad_unix_core_file_p             /* a core file */
301
    },
302
    {                           /* bfd_set_format */
303
      bfd_false, bfd_false,
304
      bfd_false, bfd_false
305
    },
306
    {                           /* bfd_write_contents */
307
      bfd_false, bfd_false,
308
      bfd_false, bfd_false
309
    },
310
 
311
    BFD_JUMP_TABLE_GENERIC (_bfd_generic),
312
    BFD_JUMP_TABLE_COPY (_bfd_generic),
313
    BFD_JUMP_TABLE_CORE (trad_unix),
314
    BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
315
    BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
316
    BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
317
    BFD_JUMP_TABLE_WRITE (_bfd_generic),
318
    BFD_JUMP_TABLE_LINK (_bfd_nolink),
319
    BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
320
 
321
    NULL,
322
 
323
    (PTR) 0                      /* backend_data */
324
  };

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