Commit | Line | Data |
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252b5132 | 1 | /* BFD back end for SCO5 core files (U-area and raw sections) |
edeb6e24 AM |
2 | Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
3 | Free Software Foundation, Inc. | |
252b5132 RH |
4 | Written by Jouke Numan <jnuman@hiscom.nl> |
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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "bfd.h" | |
23 | #include "sysdep.h" | |
24 | #include "libbfd.h" | |
b34976b6 | 25 | #include "libaout.h" /* BFD a.out internal data structures */ |
252b5132 RH |
26 | |
27 | #include <stdio.h> | |
28 | #include <sys/types.h> | |
29 | #include <sys/param.h> | |
30 | #include <sys/dir.h> | |
31 | #include <signal.h> | |
32 | ||
b34976b6 | 33 | #include <sys/user.h> /* After a.out.h */ |
252b5132 RH |
34 | #include <sys/paccess.h> |
35 | #include <sys/region.h> | |
36 | ||
37 | struct sco5_core_struct | |
38 | { | |
39 | struct user u; | |
40 | }; | |
41 | ||
42 | /* forward declarations */ | |
43 | ||
b34976b6 AM |
44 | static asection *make_bfd_asection |
45 | PARAMS ((bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr)); | |
252b5132 RH |
46 | static struct user *read_uarea PARAMS ((bfd *, int)); |
47 | const bfd_target *sco5_core_file_p PARAMS ((bfd *abfd)); | |
48 | char *sco5_core_file_failing_command PARAMS ((bfd *abfd)); | |
49 | int sco5_core_file_failing_signal PARAMS ((bfd *abfd)); | |
b34976b6 AM |
50 | bfd_boolean sco5_core_file_matches_executable_p |
51 | PARAMS ((bfd *core_bfd, bfd *exec_bfd)); | |
252b5132 RH |
52 | static void swap_abort PARAMS ((void)); |
53 | ||
54 | static asection * | |
55 | make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos) | |
56 | bfd *abfd; | |
57 | const char *name; | |
58 | flagword flags; | |
59 | bfd_size_type _raw_size; | |
60 | bfd_vma vma; | |
61 | file_ptr filepos; | |
62 | { | |
63 | asection *asect; | |
64 | ||
65 | asect = bfd_make_section_anyway (abfd, name); | |
66 | if (!asect) | |
67 | return NULL; | |
68 | asect->flags = flags; | |
69 | asect->_raw_size = _raw_size; | |
70 | asect->vma = vma; | |
71 | asect->filepos = filepos; | |
72 | asect->alignment_power = 2; | |
73 | ||
74 | return asect; | |
75 | } | |
76 | ||
252b5132 RH |
77 | static struct user * |
78 | read_uarea(abfd, filepos) | |
79 | bfd *abfd; | |
80 | int filepos; | |
81 | ||
82 | { | |
83 | struct sco5_core_struct *rawptr; | |
dc810e39 | 84 | bfd_size_type amt = sizeof (struct sco5_core_struct); |
252b5132 | 85 | |
dc810e39 | 86 | rawptr = (struct sco5_core_struct *) bfd_zmalloc (amt); |
252b5132 RH |
87 | if (rawptr == NULL) |
88 | return NULL; | |
89 | ||
90 | abfd->tdata.sco5_core_data = rawptr; | |
91 | ||
dc810e39 AM |
92 | if (bfd_seek (abfd, (file_ptr) filepos, SEEK_SET) != 0 |
93 | || bfd_bread ((void *) &rawptr->u, (bfd_size_type) sizeof rawptr->u, | |
94 | abfd) != sizeof rawptr->u) | |
252b5132 RH |
95 | { |
96 | bfd_set_error (bfd_error_wrong_format); | |
97 | return NULL; | |
98 | } | |
99 | ||
100 | /* Sanity check perhaps??? */ | |
7b82c249 | 101 | if (rawptr->u.u_dsize > 0x1000000) /* Remember, it's in pages... */ |
252b5132 RH |
102 | { |
103 | bfd_set_error (bfd_error_wrong_format); | |
104 | return NULL; | |
105 | } | |
106 | if (rawptr->u.u_ssize > 0x1000000) | |
107 | { | |
108 | bfd_set_error (bfd_error_wrong_format); | |
109 | return NULL; | |
110 | } | |
111 | return &rawptr->u; | |
112 | } | |
113 | ||
252b5132 RH |
114 | const bfd_target * |
115 | sco5_core_file_p (abfd) | |
116 | bfd *abfd; | |
117 | { | |
118 | int coffset_siz, val, nsecs, cheadoffs; | |
119 | int coresize; | |
120 | struct user *u; | |
121 | struct coreoffsets coffsets; | |
122 | struct coresecthead chead; | |
123 | char *secname; | |
124 | flagword flags; | |
125 | ||
126 | /* Read coreoffsets region at end of core (see core(FP)) */ | |
127 | ||
128 | { | |
129 | FILE *stream = bfd_cache_lookup (abfd); | |
130 | struct stat statbuf; | |
131 | if (stream == NULL) | |
132 | return NULL; | |
133 | if (fstat (fileno (stream), &statbuf) < 0) | |
134 | { | |
b34976b6 AM |
135 | bfd_set_error (bfd_error_system_call); |
136 | return NULL; | |
252b5132 RH |
137 | } |
138 | coresize = statbuf.st_size; | |
139 | } | |
140 | /* Last long in core is sizeof struct coreoffsets, read it */ | |
dc810e39 AM |
141 | if ((bfd_seek (abfd, (file_ptr) (coresize - sizeof coffset_siz), |
142 | SEEK_SET) != 0) | |
143 | || bfd_bread ((void *) &coffset_siz, (bfd_size_type) sizeof coffset_siz, | |
144 | abfd) != sizeof coffset_siz) | |
252b5132 | 145 | { |
7b82c249 | 146 | bfd_set_error (bfd_error_wrong_format); |
252b5132 RH |
147 | return NULL; |
148 | } | |
149 | ||
150 | /* Use it to seek start of coreoffsets region, read it and determine | |
151 | validity */ | |
dc810e39 AM |
152 | if ((bfd_seek (abfd, (file_ptr) (coresize - coffset_siz), SEEK_SET) != 0) |
153 | || (bfd_bread ((void *) &coffsets, (bfd_size_type) sizeof coffsets, abfd) | |
252b5132 RH |
154 | != sizeof coffsets) |
155 | || ((coffsets.u_info != 1) && (coffsets.u_info != C_VERSION))) | |
156 | { | |
7b82c249 | 157 | bfd_set_error (bfd_error_wrong_format); |
252b5132 RH |
158 | return NULL; |
159 | } | |
160 | ||
7b82c249 KH |
161 | if (coffsets.u_info == 1) |
162 | { | |
252b5132 RH |
163 | /* Old version, no section heads, read info from user struct */ |
164 | ||
9e7b37b3 | 165 | u = read_uarea (abfd, coffsets.u_user); |
252b5132 | 166 | if (! u) |
9e7b37b3 | 167 | goto fail; |
252b5132 | 168 | |
7b82c249 | 169 | if (!make_bfd_asection (abfd, ".reg", SEC_HAS_CONTENTS, |
b34976b6 AM |
170 | (bfd_size_type) coffsets.u_usize, |
171 | 0 - (bfd_vma) u->u_ar0, | |
172 | (file_ptr) coffsets.u_user)) | |
9e7b37b3 | 173 | goto fail; |
7b82c249 KH |
174 | |
175 | if (!make_bfd_asection (abfd, ".data", | |
252b5132 | 176 | SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, |
b34976b6 | 177 | ((bfd_size_type) u->u_exdata.ux_dsize |
252b5132 | 178 | + u->u_exdata.ux_bsize), |
b34976b6 AM |
179 | (bfd_vma) u->u_exdata.ux_datorg, |
180 | (file_ptr) coffsets.u_data)) | |
9e7b37b3 | 181 | goto fail; |
7b82c249 KH |
182 | |
183 | if (!make_bfd_asection (abfd, ".stack", | |
184 | SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, | |
b34976b6 AM |
185 | (bfd_size_type) u->u_ssize * NBPC, |
186 | (bfd_vma) u->u_sub, | |
187 | (file_ptr) coffsets.u_stack)) | |
9e7b37b3 | 188 | goto fail; |
252b5132 RH |
189 | |
190 | return abfd->xvec; /* Done for version 1 */ | |
7b82c249 | 191 | } |
252b5132 RH |
192 | |
193 | /* Immediately before coreoffsets region is a long with offset in core | |
194 | to first coresecthead (CORES_OFFSETS), the long before this is the | |
195 | number of section heads in the list. Read both longs and read the | |
196 | coresecthead and check its validity */ | |
7b82c249 KH |
197 | |
198 | if ((bfd_seek (abfd, | |
dc810e39 | 199 | (file_ptr) (coresize - coffset_siz - 2 * sizeof coffset_siz), |
252b5132 | 200 | SEEK_SET) != 0) |
dc810e39 AM |
201 | || (bfd_bread ((void *) &nsecs, (bfd_size_type) sizeof nsecs, abfd) |
202 | != sizeof nsecs) | |
203 | || (bfd_bread ((void *) &cheadoffs, (bfd_size_type) sizeof cheadoffs, | |
204 | abfd) != sizeof cheadoffs) | |
205 | || (bfd_seek (abfd, (file_ptr) cheadoffs, SEEK_SET) != 0) | |
206 | || (bfd_bread ((void *) &chead, (bfd_size_type) sizeof chead, abfd) | |
207 | != sizeof chead) | |
252b5132 RH |
208 | || (chead.cs_stype != CORES_OFFSETS) |
209 | || (chead.cs_x.csx_magic != COREMAGIC_NUMBER)) | |
210 | { | |
211 | bfd_set_error (bfd_error_wrong_format); | |
9e7b37b3 | 212 | goto fail; |
252b5132 RH |
213 | } |
214 | ||
215 | /* OK, we believe you. You're a core file (sure, sure). */ | |
216 | ||
217 | /* Now loop over all regions and map them */ | |
218 | nsecs--; /* We've seen CORES_OFFSETS already */ | |
7b82c249 | 219 | for (; nsecs; nsecs--) |
252b5132 | 220 | { |
dc810e39 AM |
221 | if ((bfd_seek (abfd, (file_ptr) chead.cs_hseek, SEEK_SET) != 0) |
222 | || (bfd_bread ((void *) &chead, (bfd_size_type) sizeof chead, abfd) | |
223 | != sizeof chead)) | |
b34976b6 AM |
224 | { |
225 | bfd_set_error (bfd_error_wrong_format); | |
9e7b37b3 | 226 | goto fail; |
b34976b6 | 227 | } |
252b5132 | 228 | |
7b82c249 | 229 | switch (chead.cs_stype) |
252b5132 RH |
230 | { |
231 | case CORES_MAGIC: /* Core header, check magic */ | |
232 | if (chead.cs_x.csx_magic != COREMAGIC_NUMBER) | |
233 | { | |
234 | bfd_set_error (bfd_error_wrong_format); | |
9e7b37b3 | 235 | goto fail; |
252b5132 RH |
236 | } |
237 | secname = NULL; | |
238 | nsecs++; /* MAGIC not in section cnt!*/ | |
239 | break; | |
240 | case CORES_UAREA: /* U-area, read in tdata */ | |
9e7b37b3 | 241 | u = read_uarea (abfd, chead.cs_sseek); |
252b5132 | 242 | if (! u) |
9e7b37b3 | 243 | goto fail; |
252b5132 | 244 | |
b34976b6 | 245 | /* This is tricky. As the "register section", we give them |
252b5132 RH |
246 | the entire upage and stack. u.u_ar0 points to where |
247 | "register 0" is stored. There are two tricks with this, | |
248 | though. One is that the rest of the registers might be | |
249 | at positive or negative (or both) displacements from | |
250 | *u_ar0. The other is that u_ar0 is sometimes an absolute | |
251 | address in kernel memory, and on other systems it is an | |
252 | offset from the beginning of the `struct user'. | |
7b82c249 | 253 | |
252b5132 RH |
254 | As a practical matter, we don't know where the registers |
255 | actually are, so we have to pass the whole area to GDB. | |
256 | We encode the value of u_ar0 by setting the .regs section | |
257 | up so that its virtual memory address 0 is at the place | |
258 | pointed to by u_ar0 (by setting the vma of the start of | |
259 | the section to -u_ar0). GDB uses this info to locate the | |
260 | regs, using minor trickery to get around the | |
7b82c249 | 261 | offset-or-absolute-addr problem. */ |
252b5132 RH |
262 | |
263 | chead.cs_vaddr = 0 - (bfd_vma) u->u_ar0; | |
264 | ||
b34976b6 AM |
265 | secname = ".reg"; |
266 | flags = SEC_HAS_CONTENTS; | |
252b5132 | 267 | |
b34976b6 | 268 | break; |
252b5132 RH |
269 | case CORES_PREGION: /* A program region, map it */ |
270 | switch (chead.cs_x.csx_preg.csxp_rtyp) | |
271 | { | |
272 | case PT_DATA: | |
b34976b6 | 273 | secname = ".data"; /* Data region. */ |
252b5132 RH |
274 | break; |
275 | case PT_STACK: | |
b34976b6 | 276 | secname = ".stack"; /* Stack region. */ |
252b5132 RH |
277 | break; |
278 | case PT_SHMEM: | |
b34976b6 | 279 | secname = ".shmem"; /* Shared memory */ |
252b5132 RH |
280 | break; |
281 | case PT_LIBDAT: | |
b34976b6 | 282 | secname = ".libdat"; /* Shared library data */ |
252b5132 RH |
283 | break; |
284 | case PT_V86: | |
b34976b6 | 285 | secname = ".virt86"; /* Virtual 8086 mode */ |
252b5132 RH |
286 | break; |
287 | case PT_SHFIL: | |
b34976b6 | 288 | secname = ".mmfile"; /* Memory mapped file */ |
252b5132 RH |
289 | break; |
290 | case PT_XDATA0: | |
b34976b6 | 291 | secname = ".Xdat0"; /* XENIX data region, virtual 0 */ |
252b5132 RH |
292 | break; |
293 | default: | |
294 | secname = ""; | |
295 | } | |
296 | flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; | |
297 | break; | |
298 | case CORES_PROC: /* struct proc */ | |
299 | case CORES_ITIMER: /* interval timers */ | |
300 | case CORES_SCOUTSNAME: /* struct scoutsname */ | |
301 | secname = NULL; /* Ignore these */ | |
302 | break; | |
b34976b6 AM |
303 | default: |
304 | (*_bfd_error_handler) ("Unhandled SCO core file section type %d\n", | |
305 | chead.cs_stype); | |
306 | continue; | |
307 | } | |
252b5132 RH |
308 | |
309 | if (secname | |
310 | && !make_bfd_asection (abfd, secname, flags, | |
311 | (bfd_size_type) chead.cs_vsize, | |
312 | (bfd_vma) chead.cs_vaddr, | |
313 | (file_ptr) chead.cs_sseek)) | |
9e7b37b3 | 314 | goto fail; |
252b5132 RH |
315 | |
316 | } | |
317 | ||
318 | return abfd->xvec; | |
319 | ||
9e7b37b3 AM |
320 | fail: |
321 | if (abfd->tdata.any) | |
322 | { | |
323 | bfd_release (abfd, abfd->tdata.any); | |
324 | abfd->tdata.any = NULL; | |
325 | } | |
326 | bfd_section_list_clear (abfd); | |
327 | return NULL; | |
252b5132 RH |
328 | } |
329 | ||
330 | char * | |
331 | sco5_core_file_failing_command (abfd) | |
332 | bfd *abfd; | |
333 | { | |
334 | char *com = abfd->tdata.sco5_core_data->u.u_comm; | |
335 | if (*com) | |
336 | return com; | |
337 | else | |
338 | return NULL; | |
339 | } | |
340 | ||
252b5132 RH |
341 | int |
342 | sco5_core_file_failing_signal (ignore_abfd) | |
343 | bfd *ignore_abfd; | |
344 | { | |
7b82c249 KH |
345 | return ((ignore_abfd->tdata.sco5_core_data->u.u_sysabort != 0) |
346 | ? ignore_abfd->tdata.sco5_core_data->u.u_sysabort | |
252b5132 RH |
347 | : -1); |
348 | } | |
349 | ||
b34976b6 | 350 | bfd_boolean |
252b5132 | 351 | sco5_core_file_matches_executable_p (core_bfd, exec_bfd) |
dc810e39 AM |
352 | bfd *core_bfd ATTRIBUTE_UNUSED; |
353 | bfd *exec_bfd ATTRIBUTE_UNUSED; | |
252b5132 | 354 | { |
b34976b6 | 355 | return TRUE; /* FIXME, We have no way of telling at this point */ |
252b5132 RH |
356 | } |
357 | ||
252b5132 RH |
358 | /* If somebody calls any byte-swapping routines, shoot them. */ |
359 | static void | |
7b82c249 | 360 | swap_abort () |
252b5132 | 361 | { |
7b82c249 | 362 | abort (); /* This way doesn't require any declaration for ANSI to fuck up */ |
252b5132 | 363 | } |
edeb6e24 AM |
364 | #define NO_GET ((bfd_vma (*) (const void *)) swap_abort) |
365 | #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort) | |
366 | #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort) | |
252b5132 RH |
367 | |
368 | const bfd_target sco5_core_vec = | |
369 | { | |
370 | "sco5-core", | |
371 | bfd_target_unknown_flavour, | |
b34976b6 AM |
372 | BFD_ENDIAN_LITTLE, /* target byte order */ |
373 | BFD_ENDIAN_LITTLE, /* target headers byte order */ | |
374 | (HAS_RELOC | EXEC_P | /* object flags */ | |
252b5132 RH |
375 | HAS_LINENO | HAS_DEBUG | |
376 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
377 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
b34976b6 AM |
378 | 0, /* symbol prefix */ |
379 | ' ', /* ar_pad_char */ | |
380 | 16, /* ar_max_namelen */ | |
edeb6e24 AM |
381 | NO_GET, NO_GETS, NO_PUT, /* 64 bit data */ |
382 | NO_GET, NO_GETS, NO_PUT, /* 32 bit data */ | |
383 | NO_GET, NO_GETS, NO_PUT, /* 16 bit data */ | |
384 | NO_GET, NO_GETS, NO_PUT, /* 64 bit hdrs */ | |
385 | NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */ | |
386 | NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */ | |
b34976b6 AM |
387 | |
388 | { /* bfd_check_format */ | |
389 | _bfd_dummy_target, /* unknown format */ | |
390 | _bfd_dummy_target, /* object file */ | |
391 | _bfd_dummy_target, /* archive */ | |
392 | sco5_core_file_p /* a core file */ | |
252b5132 | 393 | }, |
b34976b6 | 394 | { /* bfd_set_format */ |
252b5132 RH |
395 | bfd_false, bfd_false, |
396 | bfd_false, bfd_false | |
397 | }, | |
b34976b6 | 398 | { /* bfd_write_contents */ |
252b5132 RH |
399 | bfd_false, bfd_false, |
400 | bfd_false, bfd_false | |
401 | }, | |
402 | ||
3f3c5c34 AM |
403 | BFD_JUMP_TABLE_GENERIC (_bfd_generic), |
404 | BFD_JUMP_TABLE_COPY (_bfd_generic), | |
405 | BFD_JUMP_TABLE_CORE (sco5), | |
406 | BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), | |
407 | BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), | |
408 | BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), | |
409 | BFD_JUMP_TABLE_WRITE (_bfd_generic), | |
410 | BFD_JUMP_TABLE_LINK (_bfd_nolink), | |
411 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
252b5132 | 412 | |
c3c89269 | 413 | NULL, |
7b82c249 | 414 | |
b34976b6 | 415 | (PTR) 0 /* backend_data */ |
252b5132 | 416 | }; |