1 /* BFD back end for NetBSD style core files
2 Copyright (C) 1988-2023 Free Software Foundation, Inc.
3 Written by Paul Kranenburg, EUR
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "libaout.h" /* BFD a.out internal data structures. */
26
27 #include <sys/param.h>
28 #include <sys/dir.h>
29 #include <signal.h>
30 #include <sys/core.h>
31
32 /* The machine ID for OpenBSD/sparc64 and older versions of
33 NetBSD/sparc64 overlaps with M_MIPS1. */
34 #define M_SPARC64_OPENBSD M_MIPS1
35
36 /* Offset of StackGhost cookie within `struct md_coredump' on
37 OpenBSD/sparc. */
38 #define SPARC_WCOOKIE_OFFSET 344
39
40 /* Offset of StackGhost cookie within `struct md_coredump' on
41 OpenBSD/sparc64. */
42 #define SPARC64_WCOOKIE_OFFSET 832
43
44 #define netbsd_core_file_matches_executable_p generic_core_file_matches_executable_p
45 #define netbsd_core_file_pid _bfd_nocore_core_file_pid
46
47 struct netbsd_core_struct
48 {
49 struct core core;
50 } *rawptr;
51
52 /* Handle NetBSD-style core dump file. */
53
54 static bfd_cleanup
55 netbsd_core_file_p (bfd *abfd)
56 {
57 int val;
58 unsigned i;
59 file_ptr offset;
60 asection *asect;
61 struct core core;
62 struct coreseg coreseg;
63 size_t amt = sizeof core;
64
65 val = bfd_bread (&core, amt, abfd);
66 if (val != sizeof core)
67 {
68 /* Too small to be a core file. */
69 bfd_set_error (bfd_error_wrong_format);
70 return 0;
71 }
72
73 if (CORE_GETMAGIC (core) != COREMAGIC)
74 {
75 bfd_set_error (bfd_error_wrong_format);
76 return 0;
77 }
78
79 amt = sizeof (struct netbsd_core_struct);
80 rawptr = (struct netbsd_core_struct *) bfd_zalloc (abfd, amt);
81 if (rawptr == NULL)
82 return 0;
83
84 rawptr->core = core;
85 abfd->tdata.netbsd_core_data = rawptr;
86
87 offset = core.c_hdrsize;
88 for (i = 0; i < core.c_nseg; i++)
89 {
90 const char *sname;
91 flagword flags;
92
93 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
94 goto punt;
95
96 val = bfd_bread (&coreseg, sizeof coreseg, abfd);
97 if (val != sizeof coreseg)
98 {
99 bfd_set_error (bfd_error_file_truncated);
100 goto punt;
101 }
102 if (CORE_GETMAGIC (coreseg) != CORESEGMAGIC)
103 {
104 bfd_set_error (bfd_error_wrong_format);
105 goto punt;
106 }
107
108 offset += core.c_seghdrsize;
109
110 switch (CORE_GETFLAG (coreseg))
111 {
112 case CORE_CPU:
113 sname = ".reg";
114 flags = SEC_ALLOC + SEC_HAS_CONTENTS;
115 break;
116 case CORE_DATA:
117 sname = ".data";
118 flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
119 break;
120 case CORE_STACK:
121 sname = ".stack";
122 flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
123 break;
124 default:
125 sname = ".unknown";
126 flags = SEC_ALLOC + SEC_HAS_CONTENTS;
127 break;
128 }
129 asect = bfd_make_section_anyway_with_flags (abfd, sname, flags);
130 if (asect == NULL)
131 goto punt;
132
133 asect->size = coreseg.c_size;
134 asect->vma = coreseg.c_addr;
135 asect->filepos = offset;
136 asect->alignment_power = 2;
137
138 if (CORE_GETFLAG (coreseg) == CORE_CPU)
139 {
140 bfd_size_type wcookie_offset;
141
142 switch (CORE_GETMID (core))
143 {
144 case M_SPARC_NETBSD:
145 wcookie_offset = SPARC_WCOOKIE_OFFSET;
146 break;
147 case M_SPARC64_OPENBSD:
148 wcookie_offset = SPARC64_WCOOKIE_OFFSET;
149 break;
150 default:
151 wcookie_offset = 0;
152 break;
153 }
154
155 if (wcookie_offset > 0 && coreseg.c_size > wcookie_offset)
156 {
157 /* Truncate the .reg section. */
158 asect->size = wcookie_offset;
159
160 /* And create the .wcookie section. */
161 flags = SEC_ALLOC + SEC_HAS_CONTENTS;
162 asect = bfd_make_section_anyway_with_flags (abfd, ".wcookie",
163 flags);
164 if (asect == NULL)
165 goto punt;
166
167 asect->size = coreseg.c_size - wcookie_offset;
168 asect->vma = 0;
169 asect->filepos = offset + wcookie_offset;
170 asect->alignment_power = 2;
171 }
172 }
173
174 offset += coreseg.c_size;
175 }
176
177 /* Set architecture from machine ID. */
178 switch (CORE_GETMID (core))
179 {
180 case M_ALPHA_NETBSD:
181 bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
182 break;
183
184 case M_ARM6_NETBSD:
185 bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_3);
186 break;
187
188 case M_X86_64_NETBSD:
189 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
190 break;
191
192 case M_386_NETBSD:
193 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386);
194 break;
195
196 case M_68K_NETBSD:
197 case M_68K4K_NETBSD:
198 bfd_default_set_arch_mach (abfd, bfd_arch_m68k, 0);
199 break;
200
201 case M_HPPA_OPENBSD:
202 bfd_default_set_arch_mach (abfd, bfd_arch_hppa, bfd_mach_hppa11);
203 break;
204
205 case M_POWERPC_NETBSD:
206 bfd_default_set_arch_mach (abfd, bfd_arch_powerpc, bfd_mach_ppc);
207 break;
208
209 case M_SPARC_NETBSD:
210 bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc);
211 break;
212
213 case M_SPARC64_NETBSD:
214 case M_SPARC64_OPENBSD:
215 bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc_v9);
216 break;
217
218 case M_VAX_NETBSD:
219 case M_VAX4K_NETBSD:
220 bfd_default_set_arch_mach (abfd, bfd_arch_vax, 0);
221 break;
222 }
223
224 /* OK, we believe you. You're a core file (sure, sure). */
225 return _bfd_no_cleanup;
226
227 punt:
228 bfd_release (abfd, abfd->tdata.any);
229 abfd->tdata.any = NULL;
230 bfd_section_list_clear (abfd);
231 return 0;
232 }
233
234 static char*
235 netbsd_core_file_failing_command (bfd *abfd)
236 {
237 /*return core_command (abfd);*/
238 return abfd->tdata.netbsd_core_data->core.c_name;
239 }
240
241 static int
242 netbsd_core_file_failing_signal (bfd *abfd)
243 {
244 /*return core_signal (abfd);*/
245 return abfd->tdata.netbsd_core_data->core.c_signo;
246 }
247
248 /* If somebody calls any byte-swapping routines, shoot them. */
249
250 static void
251 swap_abort (void)
252 {
253 /* This way doesn't require any declaration for ANSI to fuck up. */
254 abort ();
255 }
256
257 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
258 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
259 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
260 #define NO_GET64 ((uint64_t (*) (const void *)) swap_abort)
261 #define NO_PUT64 ((void (*) (uint64_t, void *)) swap_abort)
262 #define NO_GETS64 ((int64_t (*) (const void *)) swap_abort)
263
264 const bfd_target core_netbsd_vec =
265 {
266 "netbsd-core",
267 bfd_target_unknown_flavour,
268 BFD_ENDIAN_UNKNOWN, /* Target byte order. */
269 BFD_ENDIAN_UNKNOWN, /* Target headers byte order. */
270 (HAS_RELOC | EXEC_P | /* Object flags. */
271 HAS_LINENO | HAS_DEBUG |
272 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
273 (SEC_HAS_CONTENTS | /* Section flags. */
274 SEC_ALLOC | SEC_LOAD | SEC_RELOC),
275 0, /* Symbol prefix. */
276 ' ', /* ar_pad_char. */
277 16, /* ar_max_namelen. */
278 0, /* Match priority. */
279 TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols. */
280 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data. */
281 NO_GET, NO_GETS, NO_PUT, /* 32 bit data. */
282 NO_GET, NO_GETS, NO_PUT, /* 16 bit data. */
283 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs. */
284 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs. */
285 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs. */
286
287 { /* bfd_check_format. */
288 _bfd_dummy_target, /* Unknown format. */
289 _bfd_dummy_target, /* Object file. */
290 _bfd_dummy_target, /* Archive. */
291 netbsd_core_file_p /* A core file. */
292 },
293 { /* bfd_set_format. */
294 _bfd_bool_bfd_false_error,
295 _bfd_bool_bfd_false_error,
296 _bfd_bool_bfd_false_error,
297 _bfd_bool_bfd_false_error
298 },
299 { /* bfd_write_contents. */
300 _bfd_bool_bfd_false_error,
301 _bfd_bool_bfd_false_error,
302 _bfd_bool_bfd_false_error,
303 _bfd_bool_bfd_false_error
304 },
305
306 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
307 BFD_JUMP_TABLE_COPY (_bfd_generic),
308 BFD_JUMP_TABLE_CORE (netbsd),
309 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
310 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
311 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
312 BFD_JUMP_TABLE_WRITE (_bfd_generic),
313 BFD_JUMP_TABLE_LINK (_bfd_nolink),
314 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
315
316 NULL,
317
318 NULL /* Backend_data. */
319 };