1 /* BFD back end for traditional Unix core files (U-area and raw sections)
2 Copyright 1988, 1989, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
3 Written by John Gilmore of Cygnus Support.
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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
24 #include "libaout.h" /* BFD a.out internal data structures */
27 #include <sys/types.h>
28 #include <sys/param.h>
32 #include <sys/user.h> /* After a.out.h */
38 struct trad_core_struct
40 asection *data_section;
41 asection *stack_section;
42 asection *reg_section;
46 #define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
47 #define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
48 #define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
49 #define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)
51 /* forward declarations */
53 const bfd_target *trad_unix_core_file_p PARAMS ((bfd *abfd));
54 char * trad_unix_core_file_failing_command PARAMS ((bfd *abfd));
55 int trad_unix_core_file_failing_signal PARAMS ((bfd *abfd));
56 boolean trad_unix_core_file_matches_executable_p
57 PARAMS ((bfd *core_bfd, bfd *exec_bfd));
59 /* Handle 4.2-style (and perhaps also sysV-style) core dump file. */
63 trad_unix_core_file_p (abfd)
70 #ifdef TRAD_CORE_USER_OFFSET
71 /* If defined, this macro is the file position of the user struct. */
72 if (bfd_seek (abfd, TRAD_CORE_USER_OFFSET, SEEK_SET) != 0)
76 val = bfd_read ((void *)&u, 1, sizeof u, abfd);
79 /* Too small to be a core file */
80 bfd_set_error (bfd_error_wrong_format);
84 /* Sanity check perhaps??? */
85 if (u.u_dsize > 0x1000000) /* Remember, it's in pages... */
87 bfd_set_error (bfd_error_wrong_format);
90 if (u.u_ssize > 0x1000000)
92 bfd_set_error (bfd_error_wrong_format);
96 /* Check that the size claimed is no greater than the file size. */
98 FILE *stream = bfd_cache_lookup (abfd);
102 if (fstat (fileno (stream), &statbuf) < 0)
104 bfd_set_error (bfd_error_system_call);
107 if (NBPG * (UPAGES + u.u_dsize
108 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
111 + u.u_ssize) > statbuf.st_size)
113 bfd_set_error (bfd_error_file_truncated);
116 #ifndef TRAD_CORE_ALLOW_ANY_EXTRA_SIZE
117 if (NBPG * (UPAGES + u.u_dsize + u.u_ssize)
118 #ifdef TRAD_CORE_EXTRA_SIZE_ALLOWED
119 /* Some systems write the file too big. */
120 + TRAD_CORE_EXTRA_SIZE_ALLOWED
124 /* The file is too big. Maybe it's not a core file
125 or we otherwise have bad values for u_dsize and u_ssize). */
126 bfd_set_error (bfd_error_wrong_format);
132 /* OK, we believe you. You're a core file (sure, sure). */
134 /* Allocate both the upage and the struct core_data at once, so
135 a single free() will free them both. */
136 rawptr = (struct trad_core_struct *)
137 bfd_zmalloc (sizeof (struct trad_core_struct));
138 if (rawptr == NULL) {
139 bfd_set_error (bfd_error_no_memory);
143 abfd->tdata.trad_core_data = rawptr;
145 rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */
147 /* Create the sections. This is raunchy, but bfd_close wants to free
150 core_stacksec(abfd) = (asection *) bfd_zmalloc (sizeof (asection));
151 if (core_stacksec (abfd) == NULL) {
153 bfd_set_error (bfd_error_no_memory);
154 free ((void *)rawptr);
157 core_datasec (abfd) = (asection *) bfd_zmalloc (sizeof (asection));
158 if (core_datasec (abfd) == NULL) {
160 free ((void *)core_stacksec (abfd));
163 core_regsec (abfd) = (asection *) bfd_zmalloc (sizeof (asection));
164 if (core_regsec (abfd) == NULL) {
165 free ((void *)core_datasec (abfd));
169 core_stacksec (abfd)->name = ".stack";
170 core_datasec (abfd)->name = ".data";
171 core_regsec (abfd)->name = ".reg";
173 core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
174 core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
175 core_regsec (abfd)->flags = SEC_HAS_CONTENTS;
177 core_datasec (abfd)->_raw_size = NBPG * u.u_dsize
178 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
182 core_stacksec (abfd)->_raw_size = NBPG * u.u_ssize;
183 core_regsec (abfd)->_raw_size = NBPG * UPAGES; /* Larger than sizeof struct u */
185 /* What a hack... we'd like to steal it from the exec file,
186 since the upage does not seem to provide it. FIXME. */
187 #ifdef HOST_DATA_START_ADDR
188 core_datasec (abfd)->vma = HOST_DATA_START_ADDR;
190 core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize);
193 #ifdef HOST_STACK_START_ADDR
194 core_stacksec (abfd)->vma = HOST_STACK_START_ADDR;
196 core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize);
199 /* This is tricky. As the "register section", we give them the entire
200 upage and stack. u.u_ar0 points to where "register 0" is stored.
201 There are two tricks with this, though. One is that the rest of the
202 registers might be at positive or negative (or both) displacements
203 from *u_ar0. The other is that u_ar0 is sometimes an absolute address
204 in kernel memory, and on other systems it is an offset from the beginning
205 of the `struct user'.
207 As a practical matter, we don't know where the registers actually are,
208 so we have to pass the whole area to GDB. We encode the value of u_ar0
209 by setting the .regs section up so that its virtual memory address
210 0 is at the place pointed to by u_ar0 (by setting the vma of the start
211 of the section to -u_ar0). GDB uses this info to locate the regs,
212 using minor trickery to get around the offset-or-absolute-addr problem. */
213 core_regsec (abfd)->vma = 0 - (int) u.u_ar0;
215 core_datasec (abfd)->filepos = NBPG * UPAGES;
216 core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize
217 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
221 core_regsec (abfd)->filepos = 0; /* Register segment is the upage */
223 /* Align to word at least */
224 core_stacksec (abfd)->alignment_power = 2;
225 core_datasec (abfd)->alignment_power = 2;
226 core_regsec (abfd)->alignment_power = 2;
228 abfd->sections = core_stacksec (abfd);
229 core_stacksec (abfd)->next = core_datasec (abfd);
230 core_datasec (abfd)->next = core_regsec (abfd);
231 abfd->section_count = 3;
237 trad_unix_core_file_failing_command (abfd)
240 #ifndef NO_CORE_COMMAND
241 char *com = abfd->tdata.trad_core_data->u.u_comm;
251 trad_unix_core_file_failing_signal (ignore_abfd)
254 #ifdef TRAD_UNIX_CORE_FILE_FAILING_SIGNAL
255 return TRAD_UNIX_CORE_FILE_FAILING_SIGNAL(ignore_abfd);
257 return -1; /* FIXME, where is it? */
263 trad_unix_core_file_matches_executable_p (core_bfd, exec_bfd)
264 bfd *core_bfd, *exec_bfd;
266 return true; /* FIXME, We have no way of telling at this point */
269 /* If somebody calls any byte-swapping routines, shoot them. */
273 abort(); /* This way doesn't require any declaration for ANSI to fuck up */
275 #define NO_GET ((bfd_vma (*) PARAMS (( const bfd_byte *))) swap_abort )
276 #define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
277 #define NO_SIGNED_GET \
278 ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
280 const bfd_target trad_core_vec =
283 bfd_target_unknown_flavour,
284 true, /* target byte order */
285 true, /* target headers byte order */
286 (HAS_RELOC | EXEC_P | /* object flags */
287 HAS_LINENO | HAS_DEBUG |
288 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
289 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
290 0, /* symbol prefix */
291 ' ', /* ar_pad_char */
292 16, /* ar_max_namelen */
293 3, /* minimum alignment power */
294 NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */
295 NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */
296 NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */
297 NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */
298 NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */
299 NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */
301 { /* bfd_check_format */
302 _bfd_dummy_target, /* unknown format */
303 _bfd_dummy_target, /* object file */
304 _bfd_dummy_target, /* archive */
305 trad_unix_core_file_p /* a core file */
307 { /* bfd_set_format */
308 bfd_false, bfd_false,
311 { /* bfd_write_contents */
312 bfd_false, bfd_false,
316 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
317 BFD_JUMP_TABLE_COPY (_bfd_generic),
318 BFD_JUMP_TABLE_CORE (trad_unix),
319 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
320 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
321 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
322 BFD_JUMP_TABLE_WRITE (_bfd_generic),
323 BFD_JUMP_TABLE_LINK (_bfd_nolink),
324 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
326 (PTR) 0 /* backend_data */