1 /* BFD back end for NetBSD style core files
2 Copyright 1988, 1989, 1991, 1992, 1993, 1996, 1998, 1999, 2000, 2001,
3 2002, 2003, 2004
4 Free Software Foundation, Inc.
5 Written by Paul Kranenburg, EUR
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22
23 #include "bfd.h"
24 #include "sysdep.h"
25 #include "libbfd.h"
26 #include "libaout.h" /* BFD a.out internal data structures */
27
28 #include <sys/param.h>
29 #include <sys/dir.h>
30 #include <signal.h>
31 #include <sys/core.h>
32
33 /*
34 * FIXME: On NetBSD/sparc CORE_FPU_OFFSET should be (sizeof (struct trapframe))
35 */
36
37 /* Offset of StackGhost cookie within `struct md_coredump' on
38 OpenBSD/sparc. */
39 #define CORE_WCOOKIE_OFFSET 344
40
41 struct netbsd_core_struct {
42 struct core core;
43 } *rawptr;
44
45 /* forward declarations */
46
47 static const bfd_target *netbsd_core_file_p
48 PARAMS ((bfd *abfd));
49 static char *netbsd_core_file_failing_command
50 PARAMS ((bfd *abfd));
51 static int netbsd_core_file_failing_signal
52 PARAMS ((bfd *abfd));
53 static bfd_boolean netbsd_core_file_matches_executable_p
54 PARAMS ((bfd *core_bfd, bfd *exec_bfd));
55 static void swap_abort
56 PARAMS ((void));
57
58 /* Handle NetBSD-style core dump file. */
59
60 static const bfd_target *
netbsd_core_file_p(abfd)61 netbsd_core_file_p (abfd)
62 bfd *abfd;
63
64 {
65 int i, val;
66 file_ptr offset;
67 asection *asect, *asect2;
68 struct core core;
69 struct coreseg coreseg;
70 bfd_size_type amt = sizeof core;
71
72 val = bfd_bread ((void *) &core, amt, abfd);
73 if (val != sizeof core)
74 {
75 /* Too small to be a core file */
76 bfd_set_error (bfd_error_wrong_format);
77 return 0;
78 }
79
80 if (CORE_GETMAGIC (core) != COREMAGIC)
81 {
82 bfd_set_error (bfd_error_wrong_format);
83 return 0;
84 }
85
86 amt = sizeof (struct netbsd_core_struct);
87 rawptr = (struct netbsd_core_struct *) bfd_zalloc (abfd, amt);
88 if (rawptr == NULL)
89 return 0;
90
91 rawptr->core = core;
92 abfd->tdata.netbsd_core_data = rawptr;
93
94 offset = core.c_hdrsize;
95 for (i = 0; i < core.c_nseg; i++)
96 {
97 const char *sname;
98 flagword flags;
99
100 if (bfd_seek (abfd, offset, SEEK_SET) != 0)
101 goto punt;
102
103 val = bfd_bread ((void *) &coreseg, (bfd_size_type) sizeof coreseg, abfd);
104 if (val != sizeof coreseg)
105 {
106 bfd_set_error (bfd_error_file_truncated);
107 goto punt;
108 }
109 if (CORE_GETMAGIC (coreseg) != CORESEGMAGIC)
110 {
111 bfd_set_error (bfd_error_wrong_format);
112 goto punt;
113 }
114
115 offset += core.c_seghdrsize;
116
117 switch (CORE_GETFLAG (coreseg))
118 {
119 case CORE_CPU:
120 sname = ".reg";
121 flags = SEC_ALLOC + SEC_HAS_CONTENTS;
122 break;
123 case CORE_DATA:
124 sname = ".data";
125 flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
126 break;
127 case CORE_STACK:
128 sname = ".stack";
129 flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
130 break;
131 default:
132 sname = ".unknown";
133 flags = SEC_ALLOC + SEC_HAS_CONTENTS;
134 break;
135 }
136 asect = bfd_make_section_anyway (abfd, sname);
137 if (asect == NULL)
138 goto punt;
139
140 asect->flags = flags;
141 asect->_raw_size = coreseg.c_size;
142 asect->vma = coreseg.c_addr;
143 asect->filepos = offset;
144 asect->alignment_power = 2;
145
146 if (CORE_GETMID (core) == M_SPARC_NETBSD
147 && CORE_GETFLAG (coreseg) == CORE_CPU
148 && coreseg.c_size > CORE_WCOOKIE_OFFSET)
149 {
150 /* Truncate the .reg section. */
151 asect->_raw_size = CORE_WCOOKIE_OFFSET;
152
153 /* And create the .wcookie section. */
154 asect = bfd_make_section_anyway (abfd, ".wcookie");
155 if (asect == NULL)
156 goto punt;
157
158 asect->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
159 asect->_raw_size = 4;
160 asect->vma = 0;
161 asect->filepos = offset + CORE_WCOOKIE_OFFSET;
162 asect->alignment_power = 2;
163 }
164
165 offset += coreseg.c_size;
166
167 #ifdef CORE_FPU_OFFSET
168 switch (CORE_GETFLAG (coreseg))
169 {
170 case CORE_CPU:
171 /* Hackish... */
172 asect->_raw_size = CORE_FPU_OFFSET;
173 asect2 = bfd_make_section_anyway (abfd, ".reg2");
174 if (asect2 == NULL)
175 goto punt;
176 asect2->_raw_size = coreseg.c_size - CORE_FPU_OFFSET;
177 asect2->vma = 0;
178 asect2->filepos = asect->filepos + CORE_FPU_OFFSET;
179 asect2->alignment_power = 2;
180 asect2->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
181 break;
182 }
183 #endif
184 }
185
186 /* OK, we believe you. You're a core file (sure, sure). */
187 return abfd->xvec;
188
189 punt:
190 bfd_release (abfd, abfd->tdata.any);
191 abfd->tdata.any = NULL;
192 bfd_section_list_clear (abfd);
193 return 0;
194 }
195
196 static char*
netbsd_core_file_failing_command(abfd)197 netbsd_core_file_failing_command (abfd)
198 bfd *abfd;
199 {
200 /*return core_command (abfd);*/
201 return abfd->tdata.netbsd_core_data->core.c_name;
202 }
203
204 static int
netbsd_core_file_failing_signal(abfd)205 netbsd_core_file_failing_signal (abfd)
206 bfd *abfd;
207 {
208 /*return core_signal (abfd);*/
209 return abfd->tdata.netbsd_core_data->core.c_signo;
210 }
211
212 static bfd_boolean
netbsd_core_file_matches_executable_p(core_bfd,exec_bfd)213 netbsd_core_file_matches_executable_p (core_bfd, exec_bfd)
214 bfd *core_bfd ATTRIBUTE_UNUSED;
215 bfd *exec_bfd ATTRIBUTE_UNUSED;
216 {
217 return TRUE; /* FIXME, We have no way of telling at this point */
218 }
219
220 /* If somebody calls any byte-swapping routines, shoot them. */
221 static void
swap_abort()222 swap_abort ()
223 {
224 abort (); /* This way doesn't require any declaration for ANSI to fuck up */
225 }
226
227 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
228 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
229 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
230 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
231 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
232 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
233
234 const bfd_target netbsd_core_vec =
235 {
236 "netbsd-core",
237 bfd_target_unknown_flavour,
238 BFD_ENDIAN_UNKNOWN, /* target byte order */
239 BFD_ENDIAN_UNKNOWN, /* target headers byte order */
240 (HAS_RELOC | EXEC_P | /* object flags */
241 HAS_LINENO | HAS_DEBUG |
242 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
243 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
244 0, /* symbol prefix */
245 ' ', /* ar_pad_char */
246 16, /* ar_max_namelen */
247 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data. */
248 NO_GET, NO_GETS, NO_PUT, /* 32 bit data. */
249 NO_GET, NO_GETS, NO_PUT, /* 16 bit data. */
250 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs. */
251 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs. */
252 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs. */
253
254 { /* bfd_check_format */
255 _bfd_dummy_target, /* unknown format */
256 _bfd_dummy_target, /* object file */
257 _bfd_dummy_target, /* archive */
258 netbsd_core_file_p /* a core file */
259 },
260 { /* bfd_set_format */
261 bfd_false, bfd_false,
262 bfd_false, bfd_false
263 },
264 { /* bfd_write_contents */
265 bfd_false, bfd_false,
266 bfd_false, bfd_false
267 },
268
269 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
270 BFD_JUMP_TABLE_COPY (_bfd_generic),
271 BFD_JUMP_TABLE_CORE (netbsd),
272 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
273 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
274 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
275 BFD_JUMP_TABLE_WRITE (_bfd_generic),
276 BFD_JUMP_TABLE_LINK (_bfd_nolink),
277 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
278
279 NULL,
280
281 (PTR) 0 /* backend_data */
282 };
283