1 /* BFD back-end for Irix core files.
2 Copyright (C) 1993-2023 Free Software Foundation, Inc.
3 Written by Stu Grossman, Cygnus Support.
4 Converted to back-end form by Ian Lance Taylor, Cygnus Support
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
22
23
24 /* This file can only be compiled on systems which use Irix style core
25 files (namely, Irix 4 and Irix 5, so far). */
26
27 #include "sysdep.h"
28 #include "bfd.h"
29 #include "libbfd.h"
30
31 #ifdef IRIX_CORE
32
33 #include <core.out.h>
34
35 struct sgi_core_struct
36 {
37 int sig;
38 char cmd[CORE_NAMESIZE];
39 };
40
41 #define core_hdr(bfd) ((bfd)->tdata.sgi_core_data)
42 #define core_signal(bfd) (core_hdr(bfd)->sig)
43 #define core_command(bfd) (core_hdr(bfd)->cmd)
44
45 #define irix_core_core_file_matches_executable_p generic_core_file_matches_executable_p
46 #define irix_core_core_file_pid _bfd_nocore_core_file_pid
47
48 static asection *make_bfd_asection
49 (bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr);
50
51 /* Helper function for irix_core_core_file_p:
52 32-bit and 64-bit versions. */
53
54 #ifdef CORE_MAGIC64
55 static int
56 do_sections64 (bfd *abfd, struct coreout *coreout)
57 {
58 struct vmap64 vmap;
59 char *secname;
60 int i, val;
61
62 for (i = 0; i < coreout->c_nvmap; i++)
63 {
64 val = bfd_bread (&vmap, (bfd_size_type) sizeof vmap, abfd);
65 if (val != sizeof vmap)
66 break;
67
68 switch (vmap.v_type)
69 {
70 case VDATA:
71 secname = ".data";
72 break;
73 case VSTACK:
74 secname = ".stack";
75 break;
76 #ifdef VMAPFILE
77 case VMAPFILE:
78 secname = ".mapfile";
79 break;
80 #endif
81 default:
82 continue;
83 }
84
85 /* A file offset of zero means that the
86 section is not contained in the corefile. */
87 if (vmap.v_offset == 0)
88 continue;
89
90 if (!make_bfd_asection (abfd, secname,
91 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
92 vmap.v_len, vmap.v_vaddr, vmap.v_offset))
93 /* Fail. */
94 return 0;
95 }
96
97 return 1;
98 }
99 #endif
100
101 /* 32-bit version. */
102
103 static int
104 do_sections (bfd *abfd, struct coreout *coreout)
105 {
106 struct vmap vmap;
107 char *secname;
108 int i, val;
109
110 for (i = 0; i < coreout->c_nvmap; i++)
111 {
112 val = bfd_bread (&vmap, (bfd_size_type) sizeof vmap, abfd);
113 if (val != sizeof vmap)
114 break;
115
116 switch (vmap.v_type)
117 {
118 case VDATA:
119 secname = ".data";
120 break;
121 case VSTACK:
122 secname = ".stack";
123 break;
124 #ifdef VMAPFILE
125 case VMAPFILE:
126 secname = ".mapfile";
127 break;
128 #endif
129 default:
130 continue;
131 }
132
133 /* A file offset of zero means that the
134 section is not contained in the corefile. */
135 if (vmap.v_offset == 0)
136 continue;
137
138 if (!make_bfd_asection (abfd, secname,
139 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
140 vmap.v_len, vmap.v_vaddr, vmap.v_offset))
141 /* Fail. */
142 return 0;
143 }
144 return 1;
145 }
146
147 static asection *
148 make_bfd_asection (bfd *abfd,
149 const char *name,
150 flagword flags,
151 bfd_size_type size,
152 bfd_vma vma,
153 file_ptr filepos)
154 {
155 asection *asect;
156
157 asect = bfd_make_section_anyway_with_flags (abfd, name, flags);
158 if (!asect)
159 return NULL;
160
161 asect->size = size;
162 asect->vma = vma;
163 asect->filepos = filepos;
164 asect->alignment_power = 4;
165
166 return asect;
167 }
168
169 static bfd_cleanup
170 irix_core_core_file_p (bfd *abfd)
171 {
172 int val;
173 struct coreout coreout;
174 struct idesc *idg, *idf, *ids;
175 size_t amt;
176
177 val = bfd_bread (&coreout, (bfd_size_type) sizeof coreout, abfd);
178 if (val != sizeof coreout)
179 {
180 if (bfd_get_error () != bfd_error_system_call)
181 bfd_set_error (bfd_error_wrong_format);
182 return 0;
183 }
184
185 if (coreout.c_version != CORE_VERSION1)
186 return 0;
187
188 /* Have we got a corefile? */
189 switch (coreout.c_magic)
190 {
191 case CORE_MAGIC: break;
192 #ifdef CORE_MAGIC64
193 case CORE_MAGIC64: break;
194 #endif
195 #ifdef CORE_MAGICN32
196 case CORE_MAGICN32: break;
197 #endif
198 default: return 0; /* Un-identifiable or not corefile. */
199 }
200
201 amt = sizeof (struct sgi_core_struct);
202 core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, amt);
203 if (!core_hdr (abfd))
204 return NULL;
205
206 strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE);
207 core_signal (abfd) = coreout.c_sigcause;
208
209 if (bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET) != 0)
210 goto fail;
211
212 /* Process corefile sections. */
213 #ifdef CORE_MAGIC64
214 if (coreout.c_magic == (int) CORE_MAGIC64)
215 {
216 if (! do_sections64 (abfd, & coreout))
217 goto fail;
218 }
219 else
220 #endif
221 if (! do_sections (abfd, & coreout))
222 goto fail;
223
224 /* Make sure that the regs are contiguous within the core file. */
225
226 idg = &coreout.c_idesc[I_GPREGS];
227 idf = &coreout.c_idesc[I_FPREGS];
228 ids = &coreout.c_idesc[I_SPECREGS];
229
230 if (idg->i_offset + idg->i_len != idf->i_offset
231 || idf->i_offset + idf->i_len != ids->i_offset)
232 goto fail; /* Can't deal with non-contig regs */
233
234 if (bfd_seek (abfd, idg->i_offset, SEEK_SET) != 0)
235 goto fail;
236
237 if (!make_bfd_asection (abfd, ".reg",
238 SEC_HAS_CONTENTS,
239 idg->i_len + idf->i_len + ids->i_len,
240 0,
241 idg->i_offset))
242 goto fail;
243
244 /* OK, we believe you. You're a core file (sure, sure). */
245 bfd_default_set_arch_mach (abfd, bfd_arch_mips, 0);
246
247 return _bfd_no_cleanup;
248
249 fail:
250 bfd_release (abfd, core_hdr (abfd));
251 core_hdr (abfd) = NULL;
252 bfd_section_list_clear (abfd);
253 return NULL;
254 }
255
256 static char *
257 irix_core_core_file_failing_command (bfd *abfd)
258 {
259 return core_command (abfd);
260 }
261
262 static int
263 irix_core_core_file_failing_signal (bfd *abfd)
264 {
265 return core_signal (abfd);
266 }
267
268 /* If somebody calls any byte-swapping routines, shoot them. */
269 static void
270 swap_abort(void)
271 {
272 abort(); /* This way doesn't require any declaration for ANSI to fuck up */
273 }
274
275 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
276 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
277 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
278 #define NO_GET64 ((uint64_t (*) (const void *)) swap_abort)
279 #define NO_PUT64 ((void (*) (uint64_t, void *)) swap_abort)
280 #define NO_GETS64 ((int64_t (*) (const void *)) swap_abort)
281
282 const bfd_target core_irix_vec =
283 {
284 "irix-core",
285 bfd_target_unknown_flavour,
286 BFD_ENDIAN_BIG, /* target byte order */
287 BFD_ENDIAN_BIG, /* target headers byte order */
288 (HAS_RELOC | EXEC_P | /* object flags */
289 HAS_LINENO | HAS_DEBUG |
290 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
291 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
292 0, /* symbol prefix */
293 ' ', /* ar_pad_char */
294 16, /* ar_max_namelen */
295 0, /* match_priority */
296 TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols. */
297 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
298 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
299 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
300 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
301 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
302 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
303
304 { /* bfd_check_format */
305 _bfd_dummy_target, /* unknown format */
306 _bfd_dummy_target, /* object file */
307 _bfd_dummy_target, /* archive */
308 irix_core_core_file_p /* a core file */
309 },
310 { /* bfd_set_format */
311 _bfd_bool_bfd_false_error,
312 _bfd_bool_bfd_false_error,
313 _bfd_bool_bfd_false_error,
314 _bfd_bool_bfd_false_error
315 },
316 { /* bfd_write_contents */
317 _bfd_bool_bfd_false_error,
318 _bfd_bool_bfd_false_error,
319 _bfd_bool_bfd_false_error,
320 _bfd_bool_bfd_false_error
321 },
322
323 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
324 BFD_JUMP_TABLE_COPY (_bfd_generic),
325 BFD_JUMP_TABLE_CORE (irix_core),
326 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
327 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
328 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
329 BFD_JUMP_TABLE_WRITE (_bfd_generic),
330 BFD_JUMP_TABLE_LINK (_bfd_nolink),
331 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
332
333 NULL,
334
335 NULL /* backend_data */
336 };
337
338 #endif /* IRIX_CORE */