1 /* BFD back end for traditional Unix core files (U-area and raw sections)
2 Copyright 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999,
3 2000, 2001, 2002, 2003, 2004
4 Free Software Foundation, Inc.
5 Written by John Gilmore of Cygnus Support.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
26 #include "libaout.h" /* BFD a.out internal data structures */
28 #include <sys/param.h>
32 # ifdef HAVE_SYS_NDIR_H
33 # include <sys/ndir.h>
35 # ifdef HAVE_SYS_DIR_H
44 #include <sys/user.h> /* After a.out.h */
50 struct trad_core_struct
52 asection *data_section;
53 asection *stack_section;
54 asection *reg_section;
58 #define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
59 #define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
60 #define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
61 #define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)
63 /* forward declarations */
65 const bfd_target *trad_unix_core_file_p PARAMS ((bfd *abfd));
66 char * trad_unix_core_file_failing_command PARAMS ((bfd *abfd));
67 int trad_unix_core_file_failing_signal PARAMS ((bfd *abfd));
68 bfd_boolean trad_unix_core_file_matches_executable_p
69 PARAMS ((bfd *core_bfd, bfd *exec_bfd));
70 static void swap_abort PARAMS ((void));
72 /* Handle 4.2-style (and perhaps also sysV-style) core dump file. */
75 trad_unix_core_file_p (abfd)
81 struct trad_core_struct *rawptr;
84 #ifdef TRAD_CORE_USER_OFFSET
85 /* If defined, this macro is the file position of the user struct. */
86 if (bfd_seek (abfd, (file_ptr) TRAD_CORE_USER_OFFSET, SEEK_SET) != 0)
90 val = bfd_bread ((void *) &u, (bfd_size_type) sizeof u, abfd);
93 /* Too small to be a core file */
94 bfd_set_error (bfd_error_wrong_format);
98 /* Sanity check perhaps??? */
99 if (u.u_dsize > 0x1000000) /* Remember, it's in pages... */
101 bfd_set_error (bfd_error_wrong_format);
104 if (u.u_ssize > 0x1000000)
106 bfd_set_error (bfd_error_wrong_format);
110 /* Check that the size claimed is no greater than the file size. */
112 FILE *stream = bfd_cache_lookup (abfd);
115 if (fstat (fileno (stream), &statbuf) < 0)
117 bfd_set_error (bfd_error_system_call);
120 if ((unsigned long) (NBPG * (UPAGES + u.u_dsize
121 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
125 > (unsigned long) statbuf.st_size)
127 bfd_set_error (bfd_error_wrong_format);
130 #ifndef TRAD_CORE_ALLOW_ANY_EXTRA_SIZE
131 if ((unsigned long) (NBPG * (UPAGES + u.u_dsize + u.u_ssize)
132 #ifdef TRAD_CORE_EXTRA_SIZE_ALLOWED
133 /* Some systems write the file too big. */
134 + TRAD_CORE_EXTRA_SIZE_ALLOWED
137 < (unsigned long) statbuf.st_size)
139 /* The file is too big. Maybe it's not a core file
140 or we otherwise have bad values for u_dsize and u_ssize). */
141 bfd_set_error (bfd_error_wrong_format);
147 /* OK, we believe you. You're a core file (sure, sure). */
149 /* Allocate both the upage and the struct core_data at once, so
150 a single free() will free them both. */
151 amt = sizeof (struct trad_core_struct);
152 rawptr = (struct trad_core_struct *) bfd_zmalloc (amt);
156 abfd->tdata.trad_core_data = rawptr;
158 rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */
160 /* Create the sections. */
162 core_stacksec(abfd) = bfd_make_section_anyway (abfd, ".stack");
163 if (core_stacksec (abfd) == NULL)
165 core_datasec (abfd) = bfd_make_section_anyway (abfd, ".data");
166 if (core_datasec (abfd) == NULL)
168 core_regsec (abfd) = bfd_make_section_anyway (abfd, ".reg");
169 if (core_regsec (abfd) == NULL)
172 core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
173 core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
174 core_regsec (abfd)->flags = SEC_HAS_CONTENTS;
176 core_datasec (abfd)->size = NBPG * u.u_dsize
177 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
181 core_stacksec (abfd)->size = NBPG * u.u_ssize;
182 core_regsec (abfd)->size = NBPG * UPAGES; /* Larger than sizeof struct u */
184 /* What a hack... we'd like to steal it from the exec file,
185 since the upage does not seem to provide it. FIXME. */
186 #ifdef HOST_DATA_START_ADDR
187 core_datasec (abfd)->vma = HOST_DATA_START_ADDR;
189 core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize);
192 #ifdef HOST_STACK_START_ADDR
193 core_stacksec (abfd)->vma = HOST_STACK_START_ADDR;
195 core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize);
198 /* This is tricky. As the "register section", we give them the entire
199 upage and stack. u.u_ar0 points to where "register 0" is stored.
200 There are two tricks with this, though. One is that the rest of the
201 registers might be at positive or negative (or both) displacements
202 from *u_ar0. The other is that u_ar0 is sometimes an absolute address
203 in kernel memory, and on other systems it is an offset from the beginning
204 of the `struct user'.
206 As a practical matter, we don't know where the registers actually are,
207 so we have to pass the whole area to GDB. We encode the value of u_ar0
208 by setting the .regs section up so that its virtual memory address
209 0 is at the place pointed to by u_ar0 (by setting the vma of the start
210 of the section to -u_ar0). GDB uses this info to locate the regs,
211 using minor trickery to get around the offset-or-absolute-addr problem. */
212 core_regsec (abfd)->vma = - (bfd_vma) (unsigned long) u.u_ar0;
214 core_datasec (abfd)->filepos = NBPG * UPAGES;
215 core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize
216 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
220 core_regsec (abfd)->filepos = 0; /* Register segment is the upage */
222 /* Align to word at least */
223 core_stacksec (abfd)->alignment_power = 2;
224 core_datasec (abfd)->alignment_power = 2;
225 core_regsec (abfd)->alignment_power = 2;
230 bfd_release (abfd, abfd->tdata.any);
231 abfd->tdata.any = NULL;
232 bfd_section_list_clear (abfd);
237 trad_unix_core_file_failing_command (abfd)
240 #ifndef NO_CORE_COMMAND
241 char *com = abfd->tdata.trad_core_data->u.u_comm;
250 trad_unix_core_file_failing_signal (ignore_abfd)
251 bfd *ignore_abfd ATTRIBUTE_UNUSED;
253 #ifdef TRAD_UNIX_CORE_FILE_FAILING_SIGNAL
254 return TRAD_UNIX_CORE_FILE_FAILING_SIGNAL(ignore_abfd);
256 return -1; /* FIXME, where is it? */
261 trad_unix_core_file_matches_executable_p (core_bfd, exec_bfd)
262 bfd *core_bfd ATTRIBUTE_UNUSED;
263 bfd *exec_bfd ATTRIBUTE_UNUSED;
265 return TRUE; /* FIXME, We have no way of telling at this point */
268 /* If somebody calls any byte-swapping routines, shoot them. */
272 abort (); /* This way doesn't require any declaration for ANSI to fuck up */
275 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
276 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
277 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
278 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
279 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
280 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
282 const bfd_target trad_core_vec =
285 bfd_target_unknown_flavour,
286 BFD_ENDIAN_UNKNOWN, /* target byte order */
287 BFD_ENDIAN_UNKNOWN, /* target headers byte order */
288 (HAS_RELOC | EXEC_P | /* object flags */
289 HAS_LINENO | HAS_DEBUG |
290 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
291 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
292 0, /* symbol prefix */
293 ' ', /* ar_pad_char */
294 16, /* ar_max_namelen */
295 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
296 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
297 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
298 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
299 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
300 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
302 { /* bfd_check_format */
303 _bfd_dummy_target, /* unknown format */
304 _bfd_dummy_target, /* object file */
305 _bfd_dummy_target, /* archive */
306 trad_unix_core_file_p /* a core file */
308 { /* bfd_set_format */
309 bfd_false, bfd_false,
312 { /* bfd_write_contents */
313 bfd_false, bfd_false,
317 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
318 BFD_JUMP_TABLE_COPY (_bfd_generic),
319 BFD_JUMP_TABLE_CORE (trad_unix),
320 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
321 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
322 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
323 BFD_JUMP_TABLE_WRITE (_bfd_generic),
324 BFD_JUMP_TABLE_LINK (_bfd_nolink),
325 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
329 (PTR) 0 /* backend_data */