1 /* BFD back end for SCO5 core files (U-area and raw sections)
2 Copyright (C) 1998-2018 Free Software Foundation, Inc.
3 Written by Jouke Numan <jnuman@hiscom.nl>
5 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
25 #include "libaout.h" /* BFD a.out internal data structures */
28 #include <sys/types.h>
29 #include <sys/param.h>
33 #include <sys/user.h> /* After a.out.h */
35 #include <sys/paccess.h>
36 #include <sys/region.h>
39 struct sco5_core_struct
44 /* forward declarations */
46 #define sco5_core_file_matches_executable_p generic_core_file_matches_executable_p
47 #define sco5_core_file_pid _bfd_nocore_core_file_pid
50 make_bfd_asection (bfd *abfd,
59 asect = bfd_make_section_anyway_with_flags (abfd, name, flags);
64 asect->filepos = filepos;
65 asect->alignment_power = 2;
71 read_uarea (bfd *abfd, int filepos)
73 struct sco5_core_struct *rawptr;
74 bfd_size_type amt = sizeof (struct sco5_core_struct);
76 rawptr = (struct sco5_core_struct *) bfd_zmalloc (amt);
80 abfd->tdata.sco5_core_data = rawptr;
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)
86 bfd_set_error (bfd_error_wrong_format);
90 /* Sanity check perhaps??? */
91 if (rawptr->u.u_dsize > 0x1000000) /* Remember, it's in pages... */
93 bfd_set_error (bfd_error_wrong_format);
96 if (rawptr->u.u_ssize > 0x1000000)
98 bfd_set_error (bfd_error_wrong_format);
105 sco5_core_file_p (bfd *abfd)
107 int coffset_siz, val, nsecs, cheadoffs;
110 struct coreoffsets coffsets;
111 struct coresecthead chead;
115 /* Read coreoffsets region at end of core (see core(FP)). */
120 if (bfd_stat (abfd, &statbuf) < 0)
123 coresize = statbuf.st_size;
125 /* Last long in core is sizeof struct coreoffsets, read it */
126 if ((bfd_seek (abfd, (file_ptr) (coresize - sizeof coffset_siz),
128 || bfd_bread ((void *) &coffset_siz, (bfd_size_type) sizeof coffset_siz,
129 abfd) != sizeof coffset_siz)
131 bfd_set_error (bfd_error_wrong_format);
135 /* Use it to seek start of coreoffsets region, read it and determine
137 if ((bfd_seek (abfd, (file_ptr) (coresize - coffset_siz), SEEK_SET) != 0)
138 || (bfd_bread ((void *) &coffsets, (bfd_size_type) sizeof coffsets, abfd)
140 || ((coffsets.u_info != 1) && (coffsets.u_info != C_VERSION)))
142 bfd_set_error (bfd_error_wrong_format);
146 if (coffsets.u_info == 1)
148 /* Old version, no section heads, read info from user struct */
150 u = read_uarea (abfd, coffsets.u_user);
154 if (!make_bfd_asection (abfd, ".reg", SEC_HAS_CONTENTS,
155 (bfd_size_type) coffsets.u_usize,
156 0 - (bfd_vma) u->u_ar0,
157 (file_ptr) coffsets.u_user))
160 if (!make_bfd_asection (abfd, ".data",
161 SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
162 ((bfd_size_type) u->u_exdata.ux_dsize
163 + u->u_exdata.ux_bsize),
164 (bfd_vma) u->u_exdata.ux_datorg,
165 (file_ptr) coffsets.u_data))
168 if (!make_bfd_asection (abfd, ".stack",
169 SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
170 (bfd_size_type) u->u_ssize * NBPC,
172 (file_ptr) coffsets.u_stack))
175 return abfd->xvec; /* Done for version 1 */
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 */
184 (file_ptr) (coresize - coffset_siz - 2 * sizeof coffset_siz),
186 || (bfd_bread ((void *) &nsecs, (bfd_size_type) sizeof nsecs, abfd)
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)
193 || (chead.cs_stype != CORES_OFFSETS)
194 || (chead.cs_x.csx_magic != COREMAGIC_NUMBER))
196 bfd_set_error (bfd_error_wrong_format);
200 /* OK, we believe you. You're a core file (sure, sure). */
202 /* Now loop over all regions and map them */
203 nsecs--; /* We've seen CORES_OFFSETS already */
204 for (; nsecs; nsecs--)
206 if ((bfd_seek (abfd, (file_ptr) chead.cs_hseek, SEEK_SET) != 0)
207 || (bfd_bread ((void *) &chead, (bfd_size_type) sizeof chead, abfd)
210 bfd_set_error (bfd_error_wrong_format);
214 switch (chead.cs_stype)
216 case CORES_MAGIC: /* Core header, check magic */
217 if (chead.cs_x.csx_magic != COREMAGIC_NUMBER)
219 bfd_set_error (bfd_error_wrong_format);
223 nsecs++; /* MAGIC not in section cnt!*/
225 case CORES_UAREA: /* U-area, read in tdata */
226 u = read_uarea (abfd, chead.cs_sseek);
230 /* This is tricky. As the "register section", we give them
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'.
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
246 offset-or-absolute-addr problem. */
248 chead.cs_vaddr = 0 - (bfd_vma) u->u_ar0;
251 flags = SEC_HAS_CONTENTS;
254 case CORES_PREGION: /* A program region, map it */
255 switch (chead.cs_x.csx_preg.csxp_rtyp)
258 secname = ".data"; /* Data region. */
261 secname = ".stack"; /* Stack region. */
264 secname = ".shmem"; /* Shared memory */
267 secname = ".libdat"; /* Shared library data */
270 secname = ".virt86"; /* Virtual 8086 mode */
273 secname = ".mmfile"; /* Memory mapped file */
276 secname = ".Xdat0"; /* XENIX data region, virtual 0 */
281 flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
283 case CORES_PROC: /* struct proc */
284 case CORES_ITIMER: /* interval timers */
285 case CORES_SCOUTSNAME: /* struct scoutsname */
286 secname = NULL; /* Ignore these */
289 _bfd_error_handler ("Unhandled SCO core file section type %d\n",
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))
308 bfd_release (abfd, abfd->tdata.any);
309 abfd->tdata.any = NULL;
311 bfd_section_list_clear (abfd);
316 sco5_core_file_failing_command (bfd *abfd)
318 char *com = abfd->tdata.sco5_core_data->u.u_comm;
326 sco5_core_file_failing_signal (bfd *ignore_abfd)
328 return ((ignore_abfd->tdata.sco5_core_data->u.u_sysabort != 0)
329 ? ignore_abfd->tdata.sco5_core_data->u.u_sysabort
333 /* If somebody calls any byte-swapping routines, shoot them. */
337 abort (); /* This way doesn't require any declaration for ANSI to fuck up */
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)
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)
347 const bfd_target core_sco5_vec =
350 bfd_target_unknown_flavour,
351 BFD_ENDIAN_LITTLE, /* target byte order */
352 BFD_ENDIAN_LITTLE, /* target headers byte order */
353 (HAS_RELOC | EXEC_P | /* object flags */
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 */
357 0, /* symbol prefix */
358 ' ', /* ar_pad_char */
359 16, /* ar_max_namelen */
360 0, /* match priority. */
361 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
362 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
363 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
364 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
365 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
366 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
368 { /* bfd_check_format */
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 */
374 { /* bfd_set_format */
375 _bfd_bool_bfd_false_error, bfd_false,
376 _bfd_bool_bfd_false_error, bfd_false
378 { /* bfd_write_contents */
379 _bfd_bool_bfd_false_error, bfd_false,
380 _bfd_bool_bfd_false_error, bfd_false
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),
395 NULL /* backend_data */