* corefile.c (generic_core_file_matches_executable_p): New function.
[deliverable/binutils-gdb.git] / bfd / irix-core.c
1 /* BFD back-end for Irix core files.
2 Copyright 1993, 1994, 1996, 1999, 2001, 2002, 2004
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
34 struct 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
46 static 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
53 static int
54 do_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
101 static int
102 do_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
145 static asection *
146 make_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 (abfd, name);
156 if (!asect)
157 return NULL;
158
159 asect->flags = flags;
160 asect->size = size;
161 asect->vma = vma;
162 asect->filepos = filepos;
163 asect->alignment_power = 4;
164
165 return asect;
166 }
167
168 static const bfd_target *
169 irix_core_core_file_p (bfd *abfd)
170 {
171 int val;
172 struct coreout coreout;
173 struct idesc *idg, *idf, *ids;
174 bfd_size_type amt;
175
176 val = bfd_bread ((PTR) &coreout, (bfd_size_type) sizeof coreout, abfd);
177 if (val != sizeof coreout)
178 {
179 if (bfd_get_error () != bfd_error_system_call)
180 bfd_set_error (bfd_error_wrong_format);
181 return 0;
182 }
183
184 if (coreout.c_version != CORE_VERSION1)
185 return 0;
186
187 /* Have we got a corefile? */
188 switch (coreout.c_magic)
189 {
190 case CORE_MAGIC: break;
191 #ifdef CORE_MAGIC64
192 case CORE_MAGIC64: break;
193 #endif
194 #ifdef CORE_MAGICN32
195 case CORE_MAGICN32: break;
196 #endif
197 default: return 0; /* Un-identifiable or not corefile. */
198 }
199
200 amt = sizeof (struct sgi_core_struct);
201 core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, amt);
202 if (!core_hdr (abfd))
203 return NULL;
204
205 strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE);
206 core_signal (abfd) = coreout.c_sigcause;
207
208 if (bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET) != 0)
209 goto fail;
210
211 /* Process corefile sections. */
212 #ifdef CORE_MAGIC64
213 if (coreout.c_magic == (int) CORE_MAGIC64)
214 {
215 if (! do_sections64 (abfd, & coreout))
216 goto fail;
217 }
218 else
219 #endif
220 if (! do_sections (abfd, & coreout))
221 goto fail;
222
223 /* Make sure that the regs are contiguous within the core file. */
224
225 idg = &coreout.c_idesc[I_GPREGS];
226 idf = &coreout.c_idesc[I_FPREGS];
227 ids = &coreout.c_idesc[I_SPECREGS];
228
229 if (idg->i_offset + idg->i_len != idf->i_offset
230 || idf->i_offset + idf->i_len != ids->i_offset)
231 goto fail; /* Can't deal with non-contig regs */
232
233 if (bfd_seek (abfd, idg->i_offset, SEEK_SET) != 0)
234 goto fail;
235
236 if (!make_bfd_asection (abfd, ".reg",
237 SEC_HAS_CONTENTS,
238 idg->i_len + idf->i_len + ids->i_len,
239 0,
240 idg->i_offset))
241 goto fail;
242
243 /* OK, we believe you. You're a core file (sure, sure). */
244 bfd_default_set_arch_mach (abfd, bfd_arch_mips, 0);
245
246 return abfd->xvec;
247
248 fail:
249 bfd_release (abfd, core_hdr (abfd));
250 core_hdr (abfd) = NULL;
251 bfd_section_list_clear (abfd);
252 return NULL;
253 }
254
255 static char *
256 irix_core_core_file_failing_command (bfd *abfd)
257 {
258 return core_command (abfd);
259 }
260
261 static int
262 irix_core_core_file_failing_signal (bfd *abfd)
263 {
264 return core_signal (abfd);
265 }
266
267 /* If somebody calls any byte-swapping routines, shoot them. */
268 static void
269 swap_abort(void)
270 {
271 abort(); /* This way doesn't require any declaration for ANSI to fuck up */
272 }
273
274 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
275 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
276 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
277 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
278 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
279 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
280
281 const bfd_target irix_core_vec =
282 {
283 "irix-core",
284 bfd_target_unknown_flavour,
285 BFD_ENDIAN_BIG, /* target byte order */
286 BFD_ENDIAN_BIG, /* target headers byte order */
287 (HAS_RELOC | EXEC_P | /* object flags */
288 HAS_LINENO | HAS_DEBUG |
289 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
290 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
291 0, /* symbol prefix */
292 ' ', /* ar_pad_char */
293 16, /* ar_max_namelen */
294 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
295 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
296 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
297 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
298 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
299 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
300
301 { /* bfd_check_format */
302 _bfd_dummy_target, /* unknown format */
303 _bfd_dummy_target, /* object file */
304 _bfd_dummy_target, /* archive */
305 irix_core_core_file_p /* a core file */
306 },
307 { /* bfd_set_format */
308 bfd_false, bfd_false,
309 bfd_false, bfd_false
310 },
311 { /* bfd_write_contents */
312 bfd_false, bfd_false,
313 bfd_false, bfd_false
314 },
315
316 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
317 BFD_JUMP_TABLE_COPY (_bfd_generic),
318 BFD_JUMP_TABLE_CORE (irix_core),
319 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
320 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
321 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
322 BFD_JUMP_TABLE_WRITE (_bfd_generic),
323 BFD_JUMP_TABLE_LINK (_bfd_nolink),
324 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
325
326 NULL,
327
328 (PTR) 0 /* backend_data */
329 };
330
331 #endif /* IRIX_CORE */
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