Commit | Line | Data |
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252b5132 | 1 | /* BFD back end for SCO5 core files (U-area and raw sections) |
82704155 | 2 | Copyright (C) 1998-2019 Free Software Foundation, Inc. |
252b5132 RH |
3 | Written by Jouke Numan <jnuman@hiscom.nl> |
4 | ||
cd123cb7 NC |
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. */ | |
252b5132 | 21 | |
252b5132 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
252b5132 | 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 */ |
9b818146 | 34 | #ifdef SCO5_CORE |
252b5132 RH |
35 | #include <sys/paccess.h> |
36 | #include <sys/region.h> | |
9b818146 | 37 | #endif |
252b5132 RH |
38 | |
39 | struct sco5_core_struct | |
40 | { | |
41 | struct user u; | |
42 | }; | |
43 | ||
44 | /* forward declarations */ | |
45 | ||
69d246d9 | 46 | #define sco5_core_file_matches_executable_p generic_core_file_matches_executable_p |
261b8d08 | 47 | #define sco5_core_file_pid _bfd_nocore_core_file_pid |
252b5132 RH |
48 | |
49 | static asection * | |
2c3fc389 NC |
50 | make_bfd_asection (bfd *abfd, |
51 | const char *name, | |
52 | flagword flags, | |
53 | bfd_size_type size, | |
54 | bfd_vma vma, | |
55 | file_ptr filepos) | |
252b5132 RH |
56 | { |
57 | asection *asect; | |
58 | ||
117ed4f8 | 59 | asect = bfd_make_section_anyway_with_flags (abfd, name, flags); |
252b5132 RH |
60 | if (!asect) |
61 | return NULL; | |
eea6121a | 62 | asect->size = size; |
252b5132 RH |
63 | asect->vma = vma; |
64 | asect->filepos = filepos; | |
65 | asect->alignment_power = 2; | |
66 | ||
67 | return asect; | |
68 | } | |
69 | ||
252b5132 | 70 | static struct user * |
2c3fc389 | 71 | read_uarea (bfd *abfd, int filepos) |
252b5132 RH |
72 | { |
73 | struct sco5_core_struct *rawptr; | |
dc810e39 | 74 | bfd_size_type amt = sizeof (struct sco5_core_struct); |
252b5132 | 75 | |
dc810e39 | 76 | rawptr = (struct sco5_core_struct *) bfd_zmalloc (amt); |
252b5132 RH |
77 | if (rawptr == NULL) |
78 | return NULL; | |
79 | ||
80 | abfd->tdata.sco5_core_data = rawptr; | |
81 | ||
dc810e39 AM |
82 | if (bfd_seek (abfd, (file_ptr) filepos, SEEK_SET) != 0 |
83 | || bfd_bread ((void *) &rawptr->u, (bfd_size_type) sizeof rawptr->u, | |
84 | abfd) != sizeof rawptr->u) | |
252b5132 RH |
85 | { |
86 | bfd_set_error (bfd_error_wrong_format); | |
87 | return NULL; | |
88 | } | |
89 | ||
90 | /* Sanity check perhaps??? */ | |
7b82c249 | 91 | if (rawptr->u.u_dsize > 0x1000000) /* Remember, it's in pages... */ |
252b5132 RH |
92 | { |
93 | bfd_set_error (bfd_error_wrong_format); | |
94 | return NULL; | |
95 | } | |
96 | if (rawptr->u.u_ssize > 0x1000000) | |
97 | { | |
98 | bfd_set_error (bfd_error_wrong_format); | |
99 | return NULL; | |
100 | } | |
101 | return &rawptr->u; | |
102 | } | |
103 | ||
252b5132 | 104 | const bfd_target * |
2c3fc389 | 105 | sco5_core_file_p (bfd *abfd) |
252b5132 RH |
106 | { |
107 | int coffset_siz, val, nsecs, cheadoffs; | |
108 | int coresize; | |
109 | struct user *u; | |
110 | struct coreoffsets coffsets; | |
111 | struct coresecthead chead; | |
112 | char *secname; | |
113 | flagword flags; | |
114 | ||
33216455 | 115 | /* Read coreoffsets region at end of core (see core(FP)). */ |
252b5132 RH |
116 | |
117 | { | |
252b5132 | 118 | struct stat statbuf; |
33216455 | 119 | |
b677b8c0 | 120 | if (bfd_stat (abfd, &statbuf) < 0) |
3dff57e8 | 121 | return NULL; |
b677b8c0 | 122 | |
252b5132 RH |
123 | coresize = statbuf.st_size; |
124 | } | |
125 | /* Last long in core is sizeof struct coreoffsets, read it */ | |
dc810e39 AM |
126 | if ((bfd_seek (abfd, (file_ptr) (coresize - sizeof coffset_siz), |
127 | SEEK_SET) != 0) | |
128 | || bfd_bread ((void *) &coffset_siz, (bfd_size_type) sizeof coffset_siz, | |
129 | abfd) != sizeof coffset_siz) | |
252b5132 | 130 | { |
7b82c249 | 131 | bfd_set_error (bfd_error_wrong_format); |
252b5132 RH |
132 | return NULL; |
133 | } | |
134 | ||
135 | /* Use it to seek start of coreoffsets region, read it and determine | |
136 | validity */ | |
dc810e39 AM |
137 | if ((bfd_seek (abfd, (file_ptr) (coresize - coffset_siz), SEEK_SET) != 0) |
138 | || (bfd_bread ((void *) &coffsets, (bfd_size_type) sizeof coffsets, abfd) | |
252b5132 RH |
139 | != sizeof coffsets) |
140 | || ((coffsets.u_info != 1) && (coffsets.u_info != C_VERSION))) | |
141 | { | |
7b82c249 | 142 | bfd_set_error (bfd_error_wrong_format); |
252b5132 RH |
143 | return NULL; |
144 | } | |
145 | ||
7b82c249 KH |
146 | if (coffsets.u_info == 1) |
147 | { | |
252b5132 RH |
148 | /* Old version, no section heads, read info from user struct */ |
149 | ||
9e7b37b3 | 150 | u = read_uarea (abfd, coffsets.u_user); |
252b5132 | 151 | if (! u) |
9e7b37b3 | 152 | goto fail; |
252b5132 | 153 | |
7b82c249 | 154 | if (!make_bfd_asection (abfd, ".reg", SEC_HAS_CONTENTS, |
b34976b6 AM |
155 | (bfd_size_type) coffsets.u_usize, |
156 | 0 - (bfd_vma) u->u_ar0, | |
157 | (file_ptr) coffsets.u_user)) | |
9e7b37b3 | 158 | goto fail; |
7b82c249 KH |
159 | |
160 | if (!make_bfd_asection (abfd, ".data", | |
252b5132 | 161 | SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, |
b34976b6 | 162 | ((bfd_size_type) u->u_exdata.ux_dsize |
252b5132 | 163 | + u->u_exdata.ux_bsize), |
b34976b6 AM |
164 | (bfd_vma) u->u_exdata.ux_datorg, |
165 | (file_ptr) coffsets.u_data)) | |
9e7b37b3 | 166 | goto fail; |
7b82c249 KH |
167 | |
168 | if (!make_bfd_asection (abfd, ".stack", | |
169 | SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, | |
b34976b6 AM |
170 | (bfd_size_type) u->u_ssize * NBPC, |
171 | (bfd_vma) u->u_sub, | |
172 | (file_ptr) coffsets.u_stack)) | |
9e7b37b3 | 173 | goto fail; |
252b5132 RH |
174 | |
175 | return abfd->xvec; /* Done for version 1 */ | |
7b82c249 | 176 | } |
252b5132 RH |
177 | |
178 | /* Immediately before coreoffsets region is a long with offset in core | |
179 | to first coresecthead (CORES_OFFSETS), the long before this is the | |
180 | number of section heads in the list. Read both longs and read the | |
181 | coresecthead and check its validity */ | |
7b82c249 KH |
182 | |
183 | if ((bfd_seek (abfd, | |
dc810e39 | 184 | (file_ptr) (coresize - coffset_siz - 2 * sizeof coffset_siz), |
252b5132 | 185 | SEEK_SET) != 0) |
dc810e39 AM |
186 | || (bfd_bread ((void *) &nsecs, (bfd_size_type) sizeof nsecs, abfd) |
187 | != sizeof nsecs) | |
188 | || (bfd_bread ((void *) &cheadoffs, (bfd_size_type) sizeof cheadoffs, | |
189 | abfd) != sizeof cheadoffs) | |
190 | || (bfd_seek (abfd, (file_ptr) cheadoffs, SEEK_SET) != 0) | |
191 | || (bfd_bread ((void *) &chead, (bfd_size_type) sizeof chead, abfd) | |
192 | != sizeof chead) | |
252b5132 RH |
193 | || (chead.cs_stype != CORES_OFFSETS) |
194 | || (chead.cs_x.csx_magic != COREMAGIC_NUMBER)) | |
195 | { | |
196 | bfd_set_error (bfd_error_wrong_format); | |
9e7b37b3 | 197 | goto fail; |
252b5132 RH |
198 | } |
199 | ||
200 | /* OK, we believe you. You're a core file (sure, sure). */ | |
201 | ||
202 | /* Now loop over all regions and map them */ | |
203 | nsecs--; /* We've seen CORES_OFFSETS already */ | |
7b82c249 | 204 | for (; nsecs; nsecs--) |
252b5132 | 205 | { |
dc810e39 AM |
206 | if ((bfd_seek (abfd, (file_ptr) chead.cs_hseek, SEEK_SET) != 0) |
207 | || (bfd_bread ((void *) &chead, (bfd_size_type) sizeof chead, abfd) | |
208 | != sizeof chead)) | |
b34976b6 AM |
209 | { |
210 | bfd_set_error (bfd_error_wrong_format); | |
9e7b37b3 | 211 | goto fail; |
b34976b6 | 212 | } |
252b5132 | 213 | |
7b82c249 | 214 | switch (chead.cs_stype) |
252b5132 RH |
215 | { |
216 | case CORES_MAGIC: /* Core header, check magic */ | |
217 | if (chead.cs_x.csx_magic != COREMAGIC_NUMBER) | |
218 | { | |
219 | bfd_set_error (bfd_error_wrong_format); | |
9e7b37b3 | 220 | goto fail; |
252b5132 RH |
221 | } |
222 | secname = NULL; | |
223 | nsecs++; /* MAGIC not in section cnt!*/ | |
224 | break; | |
225 | case CORES_UAREA: /* U-area, read in tdata */ | |
9e7b37b3 | 226 | u = read_uarea (abfd, chead.cs_sseek); |
252b5132 | 227 | if (! u) |
9e7b37b3 | 228 | goto fail; |
252b5132 | 229 | |
b34976b6 | 230 | /* This is tricky. As the "register section", we give them |
252b5132 RH |
231 | the entire upage and stack. u.u_ar0 points to where |
232 | "register 0" is stored. There are two tricks with this, | |
233 | though. One is that the rest of the registers might be | |
234 | at positive or negative (or both) displacements from | |
235 | *u_ar0. The other is that u_ar0 is sometimes an absolute | |
236 | address in kernel memory, and on other systems it is an | |
237 | offset from the beginning of the `struct user'. | |
7b82c249 | 238 | |
252b5132 RH |
239 | As a practical matter, we don't know where the registers |
240 | actually are, so we have to pass the whole area to GDB. | |
241 | We encode the value of u_ar0 by setting the .regs section | |
242 | up so that its virtual memory address 0 is at the place | |
243 | pointed to by u_ar0 (by setting the vma of the start of | |
244 | the section to -u_ar0). GDB uses this info to locate the | |
245 | regs, using minor trickery to get around the | |
7b82c249 | 246 | offset-or-absolute-addr problem. */ |
252b5132 RH |
247 | |
248 | chead.cs_vaddr = 0 - (bfd_vma) u->u_ar0; | |
249 | ||
b34976b6 AM |
250 | secname = ".reg"; |
251 | flags = SEC_HAS_CONTENTS; | |
252b5132 | 252 | |
b34976b6 | 253 | break; |
252b5132 RH |
254 | case CORES_PREGION: /* A program region, map it */ |
255 | switch (chead.cs_x.csx_preg.csxp_rtyp) | |
256 | { | |
257 | case PT_DATA: | |
b34976b6 | 258 | secname = ".data"; /* Data region. */ |
252b5132 RH |
259 | break; |
260 | case PT_STACK: | |
b34976b6 | 261 | secname = ".stack"; /* Stack region. */ |
252b5132 RH |
262 | break; |
263 | case PT_SHMEM: | |
b34976b6 | 264 | secname = ".shmem"; /* Shared memory */ |
252b5132 RH |
265 | break; |
266 | case PT_LIBDAT: | |
b34976b6 | 267 | secname = ".libdat"; /* Shared library data */ |
252b5132 RH |
268 | break; |
269 | case PT_V86: | |
b34976b6 | 270 | secname = ".virt86"; /* Virtual 8086 mode */ |
252b5132 RH |
271 | break; |
272 | case PT_SHFIL: | |
b34976b6 | 273 | secname = ".mmfile"; /* Memory mapped file */ |
252b5132 RH |
274 | break; |
275 | case PT_XDATA0: | |
b34976b6 | 276 | secname = ".Xdat0"; /* XENIX data region, virtual 0 */ |
252b5132 RH |
277 | break; |
278 | default: | |
279 | secname = ""; | |
280 | } | |
281 | flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; | |
282 | break; | |
283 | case CORES_PROC: /* struct proc */ | |
284 | case CORES_ITIMER: /* interval timers */ | |
285 | case CORES_SCOUTSNAME: /* struct scoutsname */ | |
286 | secname = NULL; /* Ignore these */ | |
287 | break; | |
b34976b6 | 288 | default: |
4eca0228 AM |
289 | _bfd_error_handler ("Unhandled SCO core file section type %d\n", |
290 | chead.cs_stype); | |
b34976b6 AM |
291 | continue; |
292 | } | |
252b5132 RH |
293 | |
294 | if (secname | |
295 | && !make_bfd_asection (abfd, secname, flags, | |
296 | (bfd_size_type) chead.cs_vsize, | |
297 | (bfd_vma) chead.cs_vaddr, | |
298 | (file_ptr) chead.cs_sseek)) | |
9e7b37b3 | 299 | goto fail; |
252b5132 RH |
300 | |
301 | } | |
302 | ||
303 | return abfd->xvec; | |
304 | ||
9e7b37b3 AM |
305 | fail: |
306 | if (abfd->tdata.any) | |
307 | { | |
308 | bfd_release (abfd, abfd->tdata.any); | |
309 | abfd->tdata.any = NULL; | |
310 | } | |
311 | bfd_section_list_clear (abfd); | |
312 | return NULL; | |
252b5132 RH |
313 | } |
314 | ||
315 | char * | |
2c3fc389 | 316 | sco5_core_file_failing_command (bfd *abfd) |
252b5132 RH |
317 | { |
318 | char *com = abfd->tdata.sco5_core_data->u.u_comm; | |
319 | if (*com) | |
320 | return com; | |
321 | else | |
322 | return NULL; | |
323 | } | |
324 | ||
252b5132 | 325 | int |
2c3fc389 | 326 | sco5_core_file_failing_signal (bfd *ignore_abfd) |
252b5132 | 327 | { |
7b82c249 KH |
328 | return ((ignore_abfd->tdata.sco5_core_data->u.u_sysabort != 0) |
329 | ? ignore_abfd->tdata.sco5_core_data->u.u_sysabort | |
252b5132 RH |
330 | : -1); |
331 | } | |
332 | ||
252b5132 RH |
333 | /* If somebody calls any byte-swapping routines, shoot them. */ |
334 | static void | |
2c3fc389 | 335 | swap_abort (void) |
252b5132 | 336 | { |
7b82c249 | 337 | abort (); /* This way doesn't require any declaration for ANSI to fuck up */ |
252b5132 | 338 | } |
8ce8c090 | 339 | |
edeb6e24 AM |
340 | #define NO_GET ((bfd_vma (*) (const void *)) swap_abort) |
341 | #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort) | |
342 | #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort) | |
8ce8c090 AM |
343 | #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort) |
344 | #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort) | |
345 | #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort) | |
252b5132 | 346 | |
6d00b590 | 347 | const bfd_target core_sco5_vec = |
252b5132 RH |
348 | { |
349 | "sco5-core", | |
350 | bfd_target_unknown_flavour, | |
b34976b6 AM |
351 | BFD_ENDIAN_LITTLE, /* target byte order */ |
352 | BFD_ENDIAN_LITTLE, /* target headers byte order */ | |
353 | (HAS_RELOC | EXEC_P | /* object flags */ | |
252b5132 RH |
354 | HAS_LINENO | HAS_DEBUG | |
355 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
356 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
d3aeb6ee AM |
357 | 0, /* symbol prefix */ |
358 | ' ', /* ar_pad_char */ | |
359 | 16, /* ar_max_namelen */ | |
360 | 0, /* match priority. */ | |
8ce8c090 | 361 | NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */ |
edeb6e24 AM |
362 | NO_GET, NO_GETS, NO_PUT, /* 32 bit data */ |
363 | NO_GET, NO_GETS, NO_PUT, /* 16 bit data */ | |
8ce8c090 | 364 | NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */ |
edeb6e24 AM |
365 | NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */ |
366 | NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */ | |
b34976b6 AM |
367 | |
368 | { /* bfd_check_format */ | |
8ce8c090 AM |
369 | _bfd_dummy_target, /* unknown format */ |
370 | _bfd_dummy_target, /* object file */ | |
371 | _bfd_dummy_target, /* archive */ | |
372 | sco5_core_file_p /* a core file */ | |
252b5132 | 373 | }, |
b34976b6 | 374 | { /* bfd_set_format */ |
d00dd7dc AM |
375 | _bfd_bool_bfd_false_error, bfd_false, |
376 | _bfd_bool_bfd_false_error, bfd_false | |
252b5132 | 377 | }, |
b34976b6 | 378 | { /* bfd_write_contents */ |
d00dd7dc AM |
379 | _bfd_bool_bfd_false_error, bfd_false, |
380 | _bfd_bool_bfd_false_error, bfd_false | |
252b5132 RH |
381 | }, |
382 | ||
3f3c5c34 AM |
383 | BFD_JUMP_TABLE_GENERIC (_bfd_generic), |
384 | BFD_JUMP_TABLE_COPY (_bfd_generic), | |
385 | BFD_JUMP_TABLE_CORE (sco5), | |
386 | BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), | |
387 | BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), | |
388 | BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), | |
389 | BFD_JUMP_TABLE_WRITE (_bfd_generic), | |
390 | BFD_JUMP_TABLE_LINK (_bfd_nolink), | |
391 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
252b5132 | 392 | |
c3c89269 | 393 | NULL, |
7b82c249 | 394 | |
2c3fc389 | 395 | NULL /* backend_data */ |
8ce8c090 | 396 | }; |