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));
58 static void swap_abort PARAMS ((void));
60 /* Handle 4.2-style (and perhaps also sysV-style) core dump file. */
64 trad_unix_core_file_p (abfd)
70 struct trad_core_struct *rawptr;
72 #ifdef TRAD_CORE_USER_OFFSET
73 /* If defined, this macro is the file position of the user struct. */
74 if (bfd_seek (abfd, TRAD_CORE_USER_OFFSET, SEEK_SET) != 0)
78 val = bfd_read ((void *)&u, 1, sizeof u, abfd);
81 /* Too small to be a core file */
82 bfd_set_error (bfd_error_wrong_format);
86 /* Sanity check perhaps??? */
87 if (u.u_dsize > 0x1000000) /* Remember, it's in pages... */
89 bfd_set_error (bfd_error_wrong_format);
92 if (u.u_ssize > 0x1000000)
94 bfd_set_error (bfd_error_wrong_format);
98 /* Check that the size claimed is no greater than the file size. */
100 FILE *stream = bfd_cache_lookup (abfd);
104 if (fstat (fileno (stream), &statbuf) < 0)
106 bfd_set_error (bfd_error_system_call);
109 if (NBPG * (UPAGES + u.u_dsize
110 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
113 + u.u_ssize) > statbuf.st_size)
115 bfd_set_error (bfd_error_file_truncated);
118 #ifndef TRAD_CORE_ALLOW_ANY_EXTRA_SIZE
119 if (NBPG * (UPAGES + u.u_dsize + u.u_ssize)
120 #ifdef TRAD_CORE_EXTRA_SIZE_ALLOWED
121 /* Some systems write the file too big. */
122 + TRAD_CORE_EXTRA_SIZE_ALLOWED
126 /* The file is too big. Maybe it's not a core file
127 or we otherwise have bad values for u_dsize and u_ssize). */
128 bfd_set_error (bfd_error_wrong_format);
134 /* OK, we believe you. You're a core file (sure, sure). */
136 /* Allocate both the upage and the struct core_data at once, so
137 a single free() will free them both. */
138 rawptr = (struct trad_core_struct *)
139 bfd_zmalloc (sizeof (struct trad_core_struct));
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_zalloc (abfd, sizeof (asection));
151 if (core_stacksec (abfd) == NULL)
153 core_datasec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
154 if (core_datasec (abfd) == NULL)
156 core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
157 if (core_regsec (abfd) == NULL)
160 core_stacksec (abfd)->name = ".stack";
161 core_datasec (abfd)->name = ".data";
162 core_regsec (abfd)->name = ".reg";
164 core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
165 core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
166 core_regsec (abfd)->flags = SEC_HAS_CONTENTS;
168 core_datasec (abfd)->_raw_size = NBPG * u.u_dsize
169 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
173 core_stacksec (abfd)->_raw_size = NBPG * u.u_ssize;
174 core_regsec (abfd)->_raw_size = NBPG * UPAGES; /* Larger than sizeof struct u */
176 /* What a hack... we'd like to steal it from the exec file,
177 since the upage does not seem to provide it. FIXME. */
178 #ifdef HOST_DATA_START_ADDR
179 core_datasec (abfd)->vma = HOST_DATA_START_ADDR;
181 core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize);
184 #ifdef HOST_STACK_START_ADDR
185 core_stacksec (abfd)->vma = HOST_STACK_START_ADDR;
187 core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize);
190 /* This is tricky. As the "register section", we give them the entire
191 upage and stack. u.u_ar0 points to where "register 0" is stored.
192 There are two tricks with this, though. One is that the rest of the
193 registers might be at positive or negative (or both) displacements
194 from *u_ar0. The other is that u_ar0 is sometimes an absolute address
195 in kernel memory, and on other systems it is an offset from the beginning
196 of the `struct user'.
198 As a practical matter, we don't know where the registers actually are,
199 so we have to pass the whole area to GDB. We encode the value of u_ar0
200 by setting the .regs section up so that its virtual memory address
201 0 is at the place pointed to by u_ar0 (by setting the vma of the start
202 of the section to -u_ar0). GDB uses this info to locate the regs,
203 using minor trickery to get around the offset-or-absolute-addr problem. */
204 core_regsec (abfd)->vma = 0 - (bfd_vma) u.u_ar0;
206 core_datasec (abfd)->filepos = NBPG * UPAGES;
207 core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize
208 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
212 core_regsec (abfd)->filepos = 0; /* Register segment is the upage */
214 /* Align to word at least */
215 core_stacksec (abfd)->alignment_power = 2;
216 core_datasec (abfd)->alignment_power = 2;
217 core_regsec (abfd)->alignment_power = 2;
219 abfd->sections = core_stacksec (abfd);
220 core_stacksec (abfd)->next = core_datasec (abfd);
221 core_datasec (abfd)->next = core_regsec (abfd);
222 abfd->section_count = 3;
228 trad_unix_core_file_failing_command (abfd)
231 #ifndef NO_CORE_COMMAND
232 char *com = abfd->tdata.trad_core_data->u.u_comm;
242 trad_unix_core_file_failing_signal (ignore_abfd)
245 #ifdef TRAD_UNIX_CORE_FILE_FAILING_SIGNAL
246 return TRAD_UNIX_CORE_FILE_FAILING_SIGNAL(ignore_abfd);
248 return -1; /* FIXME, where is it? */
254 trad_unix_core_file_matches_executable_p (core_bfd, exec_bfd)
255 bfd *core_bfd, *exec_bfd;
257 return true; /* FIXME, We have no way of telling at this point */
260 /* If somebody calls any byte-swapping routines, shoot them. */
264 abort(); /* This way doesn't require any declaration for ANSI to fuck up */
266 #define NO_GET ((bfd_vma (*) PARAMS (( const bfd_byte *))) swap_abort )
267 #define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
268 #define NO_SIGNED_GET \
269 ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
271 const bfd_target trad_core_vec =
274 bfd_target_unknown_flavour,
275 BFD_ENDIAN_UNKNOWN, /* target byte order */
276 BFD_ENDIAN_UNKNOWN, /* target headers byte order */
277 (HAS_RELOC | EXEC_P | /* object flags */
278 HAS_LINENO | HAS_DEBUG |
279 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
280 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
281 0, /* symbol prefix */
282 ' ', /* ar_pad_char */
283 16, /* ar_max_namelen */
284 NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */
285 NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */
286 NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */
287 NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */
288 NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */
289 NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */
291 { /* bfd_check_format */
292 _bfd_dummy_target, /* unknown format */
293 _bfd_dummy_target, /* object file */
294 _bfd_dummy_target, /* archive */
295 trad_unix_core_file_p /* a core file */
297 { /* bfd_set_format */
298 bfd_false, bfd_false,
301 { /* bfd_write_contents */
302 bfd_false, bfd_false,
306 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
307 BFD_JUMP_TABLE_COPY (_bfd_generic),
308 BFD_JUMP_TABLE_CORE (trad_unix),
309 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
310 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
311 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
312 BFD_JUMP_TABLE_WRITE (_bfd_generic),
313 BFD_JUMP_TABLE_LINK (_bfd_nolink),
314 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
316 (PTR) 0 /* backend_data */