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[binutils.git] / bfd / sco5-core.c
blob33592b2d3168c54f230d8f8d2e5b73b8c2e4a815
1 /* BFD back end for SCO5 core files (U-area and raw sections)
2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004
3 Free Software Foundation, Inc.
4 Written by Jouke Numan <jnuman@hiscom.nl>
6 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
22 #include "bfd.h"
23 #include "sysdep.h"
24 #include "libbfd.h"
25 #include "libaout.h" /* BFD a.out internal data structures */
27 #include <stdio.h>
28 #include <sys/types.h>
29 #include <sys/param.h>
30 #include <sys/dir.h>
31 #include <signal.h>
33 #include <sys/user.h> /* After a.out.h */
34 #include <sys/paccess.h>
35 #include <sys/region.h>
37 struct sco5_core_struct
39 struct user u;
42 /* forward declarations */
44 static asection *make_bfd_asection
45 PARAMS ((bfd *, const char *, flagword, bfd_size_type, bfd_vma, file_ptr));
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));
50 bfd_boolean sco5_core_file_matches_executable_p
51 PARAMS ((bfd *core_bfd, bfd *exec_bfd));
52 static void swap_abort PARAMS ((void));
54 static asection *
55 make_bfd_asection (abfd, name, flags, size, vma, filepos)
56 bfd *abfd;
57 const char *name;
58 flagword flags;
59 bfd_size_type size;
60 bfd_vma vma;
61 file_ptr filepos;
63 asection *asect;
65 asect = bfd_make_section_anyway (abfd, name);
66 if (!asect)
67 return NULL;
68 asect->flags = flags;
69 asect->size = size;
70 asect->vma = vma;
71 asect->filepos = filepos;
72 asect->alignment_power = 2;
74 return asect;
77 static struct user *
78 read_uarea(abfd, filepos)
79 bfd *abfd;
80 int filepos;
83 struct sco5_core_struct *rawptr;
84 bfd_size_type amt = sizeof (struct sco5_core_struct);
86 rawptr = (struct sco5_core_struct *) bfd_zmalloc (amt);
87 if (rawptr == NULL)
88 return NULL;
90 abfd->tdata.sco5_core_data = rawptr;
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)
96 bfd_set_error (bfd_error_wrong_format);
97 return NULL;
100 /* Sanity check perhaps??? */
101 if (rawptr->u.u_dsize > 0x1000000) /* Remember, it's in pages... */
103 bfd_set_error (bfd_error_wrong_format);
104 return NULL;
106 if (rawptr->u.u_ssize > 0x1000000)
108 bfd_set_error (bfd_error_wrong_format);
109 return NULL;
111 return &rawptr->u;
114 const bfd_target *
115 sco5_core_file_p (abfd)
116 bfd *abfd;
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;
126 /* Read coreoffsets region at end of core (see core(FP)). */
129 FILE *stream = bfd_cache_lookup (abfd);
130 struct stat statbuf;
132 if (fstat (fileno (stream), &statbuf) < 0)
134 bfd_set_error (bfd_error_system_call);
135 return NULL;
137 coresize = statbuf.st_size;
139 /* Last long in core is sizeof struct coreoffsets, read it */
140 if ((bfd_seek (abfd, (file_ptr) (coresize - sizeof coffset_siz),
141 SEEK_SET) != 0)
142 || bfd_bread ((void *) &coffset_siz, (bfd_size_type) sizeof coffset_siz,
143 abfd) != sizeof coffset_siz)
145 bfd_set_error (bfd_error_wrong_format);
146 return NULL;
149 /* Use it to seek start of coreoffsets region, read it and determine
150 validity */
151 if ((bfd_seek (abfd, (file_ptr) (coresize - coffset_siz), SEEK_SET) != 0)
152 || (bfd_bread ((void *) &coffsets, (bfd_size_type) sizeof coffsets, abfd)
153 != sizeof coffsets)
154 || ((coffsets.u_info != 1) && (coffsets.u_info != C_VERSION)))
156 bfd_set_error (bfd_error_wrong_format);
157 return NULL;
160 if (coffsets.u_info == 1)
162 /* Old version, no section heads, read info from user struct */
164 u = read_uarea (abfd, coffsets.u_user);
165 if (! u)
166 goto fail;
168 if (!make_bfd_asection (abfd, ".reg", SEC_HAS_CONTENTS,
169 (bfd_size_type) coffsets.u_usize,
170 0 - (bfd_vma) u->u_ar0,
171 (file_ptr) coffsets.u_user))
172 goto fail;
174 if (!make_bfd_asection (abfd, ".data",
175 SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
176 ((bfd_size_type) u->u_exdata.ux_dsize
177 + u->u_exdata.ux_bsize),
178 (bfd_vma) u->u_exdata.ux_datorg,
179 (file_ptr) coffsets.u_data))
180 goto fail;
182 if (!make_bfd_asection (abfd, ".stack",
183 SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
184 (bfd_size_type) u->u_ssize * NBPC,
185 (bfd_vma) u->u_sub,
186 (file_ptr) coffsets.u_stack))
187 goto fail;
189 return abfd->xvec; /* Done for version 1 */
192 /* Immediately before coreoffsets region is a long with offset in core
193 to first coresecthead (CORES_OFFSETS), the long before this is the
194 number of section heads in the list. Read both longs and read the
195 coresecthead and check its validity */
197 if ((bfd_seek (abfd,
198 (file_ptr) (coresize - coffset_siz - 2 * sizeof coffset_siz),
199 SEEK_SET) != 0)
200 || (bfd_bread ((void *) &nsecs, (bfd_size_type) sizeof nsecs, abfd)
201 != sizeof nsecs)
202 || (bfd_bread ((void *) &cheadoffs, (bfd_size_type) sizeof cheadoffs,
203 abfd) != sizeof cheadoffs)
204 || (bfd_seek (abfd, (file_ptr) cheadoffs, SEEK_SET) != 0)
205 || (bfd_bread ((void *) &chead, (bfd_size_type) sizeof chead, abfd)
206 != sizeof chead)
207 || (chead.cs_stype != CORES_OFFSETS)
208 || (chead.cs_x.csx_magic != COREMAGIC_NUMBER))
210 bfd_set_error (bfd_error_wrong_format);
211 goto fail;
214 /* OK, we believe you. You're a core file (sure, sure). */
216 /* Now loop over all regions and map them */
217 nsecs--; /* We've seen CORES_OFFSETS already */
218 for (; nsecs; nsecs--)
220 if ((bfd_seek (abfd, (file_ptr) chead.cs_hseek, SEEK_SET) != 0)
221 || (bfd_bread ((void *) &chead, (bfd_size_type) sizeof chead, abfd)
222 != sizeof chead))
224 bfd_set_error (bfd_error_wrong_format);
225 goto fail;
228 switch (chead.cs_stype)
230 case CORES_MAGIC: /* Core header, check magic */
231 if (chead.cs_x.csx_magic != COREMAGIC_NUMBER)
233 bfd_set_error (bfd_error_wrong_format);
234 goto fail;
236 secname = NULL;
237 nsecs++; /* MAGIC not in section cnt!*/
238 break;
239 case CORES_UAREA: /* U-area, read in tdata */
240 u = read_uarea (abfd, chead.cs_sseek);
241 if (! u)
242 goto fail;
244 /* This is tricky. As the "register section", we give them
245 the entire upage and stack. u.u_ar0 points to where
246 "register 0" is stored. There are two tricks with this,
247 though. One is that the rest of the registers might be
248 at positive or negative (or both) displacements from
249 *u_ar0. The other is that u_ar0 is sometimes an absolute
250 address in kernel memory, and on other systems it is an
251 offset from the beginning of the `struct user'.
253 As a practical matter, we don't know where the registers
254 actually are, so we have to pass the whole area to GDB.
255 We encode the value of u_ar0 by setting the .regs section
256 up so that its virtual memory address 0 is at the place
257 pointed to by u_ar0 (by setting the vma of the start of
258 the section to -u_ar0). GDB uses this info to locate the
259 regs, using minor trickery to get around the
260 offset-or-absolute-addr problem. */
262 chead.cs_vaddr = 0 - (bfd_vma) u->u_ar0;
264 secname = ".reg";
265 flags = SEC_HAS_CONTENTS;
267 break;
268 case CORES_PREGION: /* A program region, map it */
269 switch (chead.cs_x.csx_preg.csxp_rtyp)
271 case PT_DATA:
272 secname = ".data"; /* Data region. */
273 break;
274 case PT_STACK:
275 secname = ".stack"; /* Stack region. */
276 break;
277 case PT_SHMEM:
278 secname = ".shmem"; /* Shared memory */
279 break;
280 case PT_LIBDAT:
281 secname = ".libdat"; /* Shared library data */
282 break;
283 case PT_V86:
284 secname = ".virt86"; /* Virtual 8086 mode */
285 break;
286 case PT_SHFIL:
287 secname = ".mmfile"; /* Memory mapped file */
288 break;
289 case PT_XDATA0:
290 secname = ".Xdat0"; /* XENIX data region, virtual 0 */
291 break;
292 default:
293 secname = "";
295 flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
296 break;
297 case CORES_PROC: /* struct proc */
298 case CORES_ITIMER: /* interval timers */
299 case CORES_SCOUTSNAME: /* struct scoutsname */
300 secname = NULL; /* Ignore these */
301 break;
302 default:
303 (*_bfd_error_handler) ("Unhandled SCO core file section type %d\n",
304 chead.cs_stype);
305 continue;
308 if (secname
309 && !make_bfd_asection (abfd, secname, flags,
310 (bfd_size_type) chead.cs_vsize,
311 (bfd_vma) chead.cs_vaddr,
312 (file_ptr) chead.cs_sseek))
313 goto fail;
317 return abfd->xvec;
319 fail:
320 if (abfd->tdata.any)
322 bfd_release (abfd, abfd->tdata.any);
323 abfd->tdata.any = NULL;
325 bfd_section_list_clear (abfd);
326 return NULL;
329 char *
330 sco5_core_file_failing_command (abfd)
331 bfd *abfd;
333 char *com = abfd->tdata.sco5_core_data->u.u_comm;
334 if (*com)
335 return com;
336 else
337 return NULL;
341 sco5_core_file_failing_signal (ignore_abfd)
342 bfd *ignore_abfd;
344 return ((ignore_abfd->tdata.sco5_core_data->u.u_sysabort != 0)
345 ? ignore_abfd->tdata.sco5_core_data->u.u_sysabort
346 : -1);
349 bfd_boolean
350 sco5_core_file_matches_executable_p (core_bfd, exec_bfd)
351 bfd *core_bfd ATTRIBUTE_UNUSED;
352 bfd *exec_bfd ATTRIBUTE_UNUSED;
354 return TRUE; /* FIXME, We have no way of telling at this point */
357 /* If somebody calls any byte-swapping routines, shoot them. */
358 static void
359 swap_abort ()
361 abort (); /* This way doesn't require any declaration for ANSI to fuck up */
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)
367 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
368 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
369 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
371 const bfd_target sco5_core_vec =
373 "sco5-core",
374 bfd_target_unknown_flavour,
375 BFD_ENDIAN_LITTLE, /* target byte order */
376 BFD_ENDIAN_LITTLE, /* target headers byte order */
377 (HAS_RELOC | EXEC_P | /* object flags */
378 HAS_LINENO | HAS_DEBUG |
379 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
380 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
381 0, /* symbol prefix */
382 ' ', /* ar_pad_char */
383 16, /* ar_max_namelen */
384 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
385 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
386 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
387 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
388 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
389 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
391 { /* bfd_check_format */
392 _bfd_dummy_target, /* unknown format */
393 _bfd_dummy_target, /* object file */
394 _bfd_dummy_target, /* archive */
395 sco5_core_file_p /* a core file */
397 { /* bfd_set_format */
398 bfd_false, bfd_false,
399 bfd_false, bfd_false
401 { /* bfd_write_contents */
402 bfd_false, bfd_false,
403 bfd_false, bfd_false
406 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
407 BFD_JUMP_TABLE_COPY (_bfd_generic),
408 BFD_JUMP_TABLE_CORE (sco5),
409 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
410 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
411 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
412 BFD_JUMP_TABLE_WRITE (_bfd_generic),
413 BFD_JUMP_TABLE_LINK (_bfd_nolink),
414 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
416 NULL,
418 (PTR) 0 /* backend_data */