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 static asection *make_bfd_asection
45 (bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr);
46
47 /* Helper function for irix_core_core_file_p:
48 32-bit and 64-bit versions. */
49
50 #ifdef CORE_MAGIC64
51 static int
do_sections64(bfd * abfd,struct coreout * coreout)52 do_sections64 (bfd *abfd, struct coreout *coreout)
53 {
54 struct vmap64 vmap;
55 char *secname;
56 int i, val;
57
58 for (i = 0; i < coreout->c_nvmap; i++)
59 {
60 val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd);
61 if (val != sizeof vmap)
62 break;
63
64 switch (vmap.v_type)
65 {
66 case VDATA:
67 secname = ".data";
68 break;
69 case VSTACK:
70 secname = ".stack";
71 break;
72 #ifdef VMAPFILE
73 case VMAPFILE:
74 secname = ".mapfile";
75 break;
76 #endif
77 default:
78 continue;
79 }
80
81 /* A file offset of zero means that the
82 section is not contained in the corefile. */
83 if (vmap.v_offset == 0)
84 continue;
85
86 if (!make_bfd_asection (abfd, secname,
87 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
88 vmap.v_len, vmap.v_vaddr, vmap.v_offset))
89 /* Fail. */
90 return 0;
91 }
92
93 return 1;
94 }
95 #endif
96
97 /* 32-bit version. */
98
99 static int
do_sections(bfd * abfd,struct coreout * coreout)100 do_sections (bfd *abfd, struct coreout *coreout)
101 {
102 struct vmap vmap;
103 char *secname;
104 int i, val;
105
106 for (i = 0; i < coreout->c_nvmap; i++)
107 {
108 val = bfd_bread ((PTR) &vmap, (bfd_size_type) sizeof vmap, abfd);
109 if (val != sizeof vmap)
110 break;
111
112 switch (vmap.v_type)
113 {
114 case VDATA:
115 secname = ".data";
116 break;
117 case VSTACK:
118 secname = ".stack";
119 break;
120 #ifdef VMAPFILE
121 case VMAPFILE:
122 secname = ".mapfile";
123 break;
124 #endif
125 default:
126 continue;
127 }
128
129 /* A file offset of zero means that the
130 section is not contained in the corefile. */
131 if (vmap.v_offset == 0)
132 continue;
133
134 if (!make_bfd_asection (abfd, secname,
135 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
136 vmap.v_len, vmap.v_vaddr, vmap.v_offset))
137 /* Fail. */
138 return 0;
139 }
140 return 1;
141 }
142
143 static asection *
make_bfd_asection(bfd * abfd,const char * name,flagword flags,bfd_size_type size,bfd_vma vma,file_ptr filepos)144 make_bfd_asection (bfd *abfd,
145 const char *name,
146 flagword flags,
147 bfd_size_type size,
148 bfd_vma vma,
149 file_ptr filepos)
150 {
151 asection *asect;
152
153 asect = bfd_make_section_anyway (abfd, name);
154 if (!asect)
155 return NULL;
156
157 asect->flags = flags;
158 asect->size = size;
159 asect->vma = vma;
160 asect->filepos = filepos;
161 asect->alignment_power = 4;
162
163 return asect;
164 }
165
166 static const bfd_target *
irix_core_core_file_p(bfd * abfd)167 irix_core_core_file_p (bfd *abfd)
168 {
169 int val;
170 struct coreout coreout;
171 struct idesc *idg, *idf, *ids;
172 bfd_size_type amt;
173
174 val = bfd_bread ((PTR) &coreout, (bfd_size_type) sizeof coreout, abfd);
175 if (val != sizeof coreout)
176 {
177 if (bfd_get_error () != bfd_error_system_call)
178 bfd_set_error (bfd_error_wrong_format);
179 return 0;
180 }
181
182 if (coreout.c_version != CORE_VERSION1)
183 return 0;
184
185 /* Have we got a corefile? */
186 switch (coreout.c_magic)
187 {
188 case CORE_MAGIC: break;
189 #ifdef CORE_MAGIC64
190 case CORE_MAGIC64: break;
191 #endif
192 #ifdef CORE_MAGICN32
193 case CORE_MAGICN32: break;
194 #endif
195 default: return 0; /* Un-identifiable or not corefile. */
196 }
197
198 amt = sizeof (struct sgi_core_struct);
199 core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, amt);
200 if (!core_hdr (abfd))
201 return NULL;
202
203 strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE);
204 core_signal (abfd) = coreout.c_sigcause;
205
206 if (bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET) != 0)
207 goto fail;
208
209 /* Process corefile sections. */
210 #ifdef CORE_MAGIC64
211 if (coreout.c_magic == (int) CORE_MAGIC64)
212 {
213 if (! do_sections64 (abfd, & coreout))
214 goto fail;
215 }
216 else
217 #endif
218 if (! do_sections (abfd, & coreout))
219 goto fail;
220
221 /* Make sure that the regs are contiguous within the core file. */
222
223 idg = &coreout.c_idesc[I_GPREGS];
224 idf = &coreout.c_idesc[I_FPREGS];
225 ids = &coreout.c_idesc[I_SPECREGS];
226
227 if (idg->i_offset + idg->i_len != idf->i_offset
228 || idf->i_offset + idf->i_len != ids->i_offset)
229 goto fail; /* Can't deal with non-contig regs */
230
231 if (bfd_seek (abfd, idg->i_offset, SEEK_SET) != 0)
232 goto fail;
233
234 if (!make_bfd_asection (abfd, ".reg",
235 SEC_HAS_CONTENTS,
236 idg->i_len + idf->i_len + ids->i_len,
237 0,
238 idg->i_offset))
239 goto fail;
240
241 /* OK, we believe you. You're a core file (sure, sure). */
242 bfd_default_set_arch_mach (abfd, bfd_arch_mips, 0);
243
244 return abfd->xvec;
245
246 fail:
247 bfd_release (abfd, core_hdr (abfd));
248 core_hdr (abfd) = NULL;
249 bfd_section_list_clear (abfd);
250 return NULL;
251 }
252
253 static char *
irix_core_core_file_failing_command(bfd * abfd)254 irix_core_core_file_failing_command (bfd *abfd)
255 {
256 return core_command (abfd);
257 }
258
259 static int
irix_core_core_file_failing_signal(bfd * abfd)260 irix_core_core_file_failing_signal (bfd *abfd)
261 {
262 return core_signal (abfd);
263 }
264
265 static bfd_boolean
irix_core_core_file_matches_executable_p(bfd * core_bfd ATTRIBUTE_UNUSED,bfd * exec_bfd ATTRIBUTE_UNUSED)266 irix_core_core_file_matches_executable_p (bfd *core_bfd ATTRIBUTE_UNUSED,
267 bfd *exec_bfd ATTRIBUTE_UNUSED)
268 {
269 return TRUE; /* XXX - FIXME */
270 }
271
272 /* If somebody calls any byte-swapping routines, shoot them. */
273 static void
swap_abort(void)274 swap_abort(void)
275 {
276 abort(); /* This way doesn't require any declaration for ANSI to fuck up */
277 }
278
279 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
280 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
281 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
282 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
283 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
284 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
285
286 const bfd_target irix_core_vec =
287 {
288 "irix-core",
289 bfd_target_unknown_flavour,
290 BFD_ENDIAN_BIG, /* target byte order */
291 BFD_ENDIAN_BIG, /* target headers byte order */
292 (HAS_RELOC | EXEC_P | /* object flags */
293 HAS_LINENO | HAS_DEBUG |
294 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
295 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
296 0, /* symbol prefix */
297 ' ', /* ar_pad_char */
298 16, /* ar_max_namelen */
299 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
300 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
301 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
302 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
303 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
304 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
305
306 { /* bfd_check_format */
307 _bfd_dummy_target, /* unknown format */
308 _bfd_dummy_target, /* object file */
309 _bfd_dummy_target, /* archive */
310 irix_core_core_file_p /* a core file */
311 },
312 { /* bfd_set_format */
313 bfd_false, bfd_false,
314 bfd_false, bfd_false
315 },
316 { /* bfd_write_contents */
317 bfd_false, bfd_false,
318 bfd_false, bfd_false
319 },
320
321 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
322 BFD_JUMP_TABLE_COPY (_bfd_generic),
323 BFD_JUMP_TABLE_CORE (irix_core),
324 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
325 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
326 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
327 BFD_JUMP_TABLE_WRITE (_bfd_generic),
328 BFD_JUMP_TABLE_LINK (_bfd_nolink),
329 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
330
331 NULL,
332
333 (PTR) 0 /* backend_data */
334 };
335
336 #endif /* IRIX_CORE */
337