1/* BFD back-end for Irix core files.
2   Copyright 1993, 1994, 1996, 1999, 2001, 2002, 2004, 2006
3   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 2 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, MA 02110-1301, USA.  */
22
23/* This file can only be compiled on systems which use Irix style core
24   files (namely, Irix 4 and Irix 5, so far).  */
25
26#include "bfd.h"
27#include "sysdep.h"
28#include "libbfd.h"
29
30#ifdef IRIX_CORE
31
32#include <core.out.h>
33
34struct sgi_core_struct
35{
36  int sig;
37  char cmd[CORE_NAMESIZE];
38};
39
40#define core_hdr(bfd) ((bfd)->tdata.sgi_core_data)
41#define core_signal(bfd) (core_hdr(bfd)->sig)
42#define core_command(bfd) (core_hdr(bfd)->cmd)
43
44#define irix_core_core_file_matches_executable_p generic_core_file_matches_executable_p
45
46static asection *make_bfd_asection
47  (bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr);
48
49/* Helper function for irix_core_core_file_p:
50   32-bit and 64-bit versions.  */
51
52#ifdef CORE_MAGIC64
53static int
54do_sections64 (bfd *abfd, struct coreout *coreout)
55{
56  struct vmap64 vmap;
57  char *secname;
58  int i, val;
59
60  for (i = 0; i < coreout->c_nvmap; i++)
61    {
62      val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd);
63      if (val != sizeof vmap)
64	break;
65
66      switch (vmap.v_type)
67	{
68	case VDATA:
69	  secname = ".data";
70	  break;
71	case VSTACK:
72	  secname = ".stack";
73	  break;
74#ifdef VMAPFILE
75	case VMAPFILE:
76	  secname = ".mapfile";
77	  break;
78#endif
79	default:
80	  continue;
81	}
82
83      /* A file offset of zero means that the
84	 section is not contained in the corefile.  */
85      if (vmap.v_offset == 0)
86	continue;
87
88      if (!make_bfd_asection (abfd, secname,
89			      SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
90			      vmap.v_len, vmap.v_vaddr, vmap.v_offset))
91	/* Fail.  */
92	return 0;
93    }
94
95  return 1;
96}
97#endif
98
99/* 32-bit version.  */
100
101static int
102do_sections (bfd *abfd, struct coreout *coreout)
103{
104  struct vmap vmap;
105  char *secname;
106  int i, val;
107
108  for (i = 0; i < coreout->c_nvmap; i++)
109    {
110      val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd);
111      if (val != sizeof vmap)
112	break;
113
114      switch (vmap.v_type)
115	{
116	case VDATA:
117	  secname = ".data";
118	  break;
119	case VSTACK:
120	  secname = ".stack";
121	  break;
122#ifdef VMAPFILE
123	case VMAPFILE:
124	  secname = ".mapfile";
125	  break;
126#endif
127	default:
128	  continue;
129	}
130
131      /* A file offset of zero means that the
132	 section is not contained in the corefile.  */
133      if (vmap.v_offset == 0)
134	continue;
135
136      if (!make_bfd_asection (abfd, secname,
137			      SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
138			      vmap.v_len, vmap.v_vaddr, vmap.v_offset))
139	/* Fail.  */
140	return 0;
141    }
142  return 1;
143}
144
145static asection *
146make_bfd_asection (bfd *abfd,
147                   const char *name,
148                   flagword flags,
149                   bfd_size_type size,
150                   bfd_vma vma,
151                   file_ptr filepos)
152{
153  asection *asect;
154
155  asect = bfd_make_section_anyway_with_flags (abfd, name, flags);
156  if (!asect)
157    return NULL;
158
159  asect->size = size;
160  asect->vma = vma;
161  asect->filepos = filepos;
162  asect->alignment_power = 4;
163
164  return asect;
165}
166
167static const bfd_target *
168irix_core_core_file_p (bfd *abfd)
169{
170  int val;
171  struct coreout coreout;
172  struct idesc *idg, *idf, *ids;
173  bfd_size_type amt;
174
175  val = bfd_bread ((PTR) &coreout, (bfd_size_type) sizeof coreout, abfd);
176  if (val != sizeof coreout)
177    {
178      if (bfd_get_error () != bfd_error_system_call)
179	bfd_set_error (bfd_error_wrong_format);
180      return 0;
181    }
182
183  if (coreout.c_version != CORE_VERSION1)
184    return 0;
185
186  /* Have we got a corefile?  */
187  switch (coreout.c_magic)
188    {
189    case CORE_MAGIC:	break;
190#ifdef CORE_MAGIC64
191    case CORE_MAGIC64:	break;
192#endif
193#ifdef CORE_MAGICN32
194    case CORE_MAGICN32:	break;
195#endif
196    default:		return 0;	/* Un-identifiable or not corefile.  */
197    }
198
199  amt = sizeof (struct sgi_core_struct);
200  core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, amt);
201  if (!core_hdr (abfd))
202    return NULL;
203
204  strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE);
205  core_signal (abfd) = coreout.c_sigcause;
206
207  if (bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET) != 0)
208    goto fail;
209
210  /* Process corefile sections.  */
211#ifdef CORE_MAGIC64
212  if (coreout.c_magic == (int) CORE_MAGIC64)
213    {
214      if (! do_sections64 (abfd, & coreout))
215	goto fail;
216    }
217  else
218#endif
219    if (! do_sections (abfd, & coreout))
220      goto fail;
221
222  /* Make sure that the regs are contiguous within the core file.  */
223
224  idg = &coreout.c_idesc[I_GPREGS];
225  idf = &coreout.c_idesc[I_FPREGS];
226  ids = &coreout.c_idesc[I_SPECREGS];
227
228  if (idg->i_offset + idg->i_len != idf->i_offset
229      || idf->i_offset + idf->i_len != ids->i_offset)
230    goto fail;			/* Can't deal with non-contig regs */
231
232  if (bfd_seek (abfd, idg->i_offset, SEEK_SET) != 0)
233    goto fail;
234
235  if (!make_bfd_asection (abfd, ".reg",
236			  SEC_HAS_CONTENTS,
237			  idg->i_len + idf->i_len + ids->i_len,
238			  0,
239			  idg->i_offset))
240    goto fail;
241
242  /* OK, we believe you.  You're a core file (sure, sure).  */
243  bfd_default_set_arch_mach (abfd, bfd_arch_mips, 0);
244
245  return abfd->xvec;
246
247 fail:
248  bfd_release (abfd, core_hdr (abfd));
249  core_hdr (abfd) = NULL;
250  bfd_section_list_clear (abfd);
251  return NULL;
252}
253
254static char *
255irix_core_core_file_failing_command (bfd *abfd)
256{
257  return core_command (abfd);
258}
259
260static int
261irix_core_core_file_failing_signal (bfd *abfd)
262{
263  return core_signal (abfd);
264}
265
266/* If somebody calls any byte-swapping routines, shoot them.  */
267static void
268swap_abort(void)
269{
270  abort(); /* This way doesn't require any declaration for ANSI to fuck up */
271}
272
273#define	NO_GET ((bfd_vma (*) (const void *)) swap_abort)
274#define	NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
275#define	NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
276#define	NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
277#define	NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
278#define	NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
279
280const bfd_target irix_core_vec =
281  {
282    "irix-core",
283    bfd_target_unknown_flavour,
284    BFD_ENDIAN_BIG,		/* target byte order */
285    BFD_ENDIAN_BIG,		/* target headers byte order */
286    (HAS_RELOC | EXEC_P |	/* object flags */
287     HAS_LINENO | HAS_DEBUG |
288     HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
289    (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
290    0,			                                   /* symbol prefix */
291    ' ',						   /* ar_pad_char */
292    16,							   /* ar_max_namelen */
293    NO_GET64, NO_GETS64, NO_PUT64,	/* 64 bit data */
294    NO_GET, NO_GETS, NO_PUT,		/* 32 bit data */
295    NO_GET, NO_GETS, NO_PUT,		/* 16 bit data */
296    NO_GET64, NO_GETS64, NO_PUT64,	/* 64 bit hdrs */
297    NO_GET, NO_GETS, NO_PUT,		/* 32 bit hdrs */
298    NO_GET, NO_GETS, NO_PUT,		/* 16 bit hdrs */
299
300    {				/* bfd_check_format */
301      _bfd_dummy_target,		/* unknown format */
302      _bfd_dummy_target,		/* object file */
303      _bfd_dummy_target,		/* archive */
304      irix_core_core_file_p		/* a core file */
305    },
306    {				/* bfd_set_format */
307      bfd_false, bfd_false,
308      bfd_false, bfd_false
309    },
310    {				/* bfd_write_contents */
311      bfd_false, bfd_false,
312      bfd_false, bfd_false
313    },
314
315    BFD_JUMP_TABLE_GENERIC (_bfd_generic),
316    BFD_JUMP_TABLE_COPY (_bfd_generic),
317    BFD_JUMP_TABLE_CORE (irix_core),
318    BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
319    BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
320    BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
321    BFD_JUMP_TABLE_WRITE (_bfd_generic),
322    BFD_JUMP_TABLE_LINK (_bfd_nolink),
323    BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
324
325    NULL,
326
327    (PTR) 0			/* backend_data */
328  };
329
330#endif /* IRIX_CORE */
331