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>
31 #include <sys/user.h> /* After a.out.h */
37 struct trad_core_struct
39 asection *data_section;
40 asection *stack_section;
41 asection *reg_section;
45 #define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
46 #define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
47 #define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
48 #define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)
50 /* forward declarations */
52 const bfd_target *trad_unix_core_file_p PARAMS ((bfd *abfd));
53 char * trad_unix_core_file_failing_command PARAMS ((bfd *abfd));
54 int trad_unix_core_file_failing_signal PARAMS ((bfd *abfd));
55 boolean trad_unix_core_file_matches_executable_p
56 PARAMS ((bfd *core_bfd, bfd *exec_bfd));
58 /* Handle 4.2-style (and perhaps also sysV-style) core dump file. */
62 trad_unix_core_file_p (abfd)
68 struct trad_core_struct *rawptr;
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));
141 abfd->tdata.trad_core_data = rawptr;
143 rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */
145 /* Create the sections. This is raunchy, but bfd_close wants to free
148 core_stacksec(abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
149 if (core_stacksec (abfd) == NULL)
151 core_datasec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
152 if (core_datasec (abfd) == NULL)
154 core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
155 if (core_regsec (abfd) == NULL)
158 core_stacksec (abfd)->name = ".stack";
159 core_datasec (abfd)->name = ".data";
160 core_regsec (abfd)->name = ".reg";
162 core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
163 core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
164 core_regsec (abfd)->flags = SEC_HAS_CONTENTS;
166 core_datasec (abfd)->_raw_size = NBPG * u.u_dsize
167 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
171 core_stacksec (abfd)->_raw_size = NBPG * u.u_ssize;
172 core_regsec (abfd)->_raw_size = NBPG * UPAGES; /* Larger than sizeof struct u */
174 /* What a hack... we'd like to steal it from the exec file,
175 since the upage does not seem to provide it. FIXME. */
176 #ifdef HOST_DATA_START_ADDR
177 core_datasec (abfd)->vma = HOST_DATA_START_ADDR;
179 core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize);
182 #ifdef HOST_STACK_START_ADDR
183 core_stacksec (abfd)->vma = HOST_STACK_START_ADDR;
185 core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize);
188 /* This is tricky. As the "register section", we give them the entire
189 upage and stack. u.u_ar0 points to where "register 0" is stored.
190 There are two tricks with this, though. One is that the rest of the
191 registers might be at positive or negative (or both) displacements
192 from *u_ar0. The other is that u_ar0 is sometimes an absolute address
193 in kernel memory, and on other systems it is an offset from the beginning
194 of the `struct user'.
196 As a practical matter, we don't know where the registers actually are,
197 so we have to pass the whole area to GDB. We encode the value of u_ar0
198 by setting the .regs section up so that its virtual memory address
199 0 is at the place pointed to by u_ar0 (by setting the vma of the start
200 of the section to -u_ar0). GDB uses this info to locate the regs,
201 using minor trickery to get around the offset-or-absolute-addr problem. */
202 core_regsec (abfd)->vma = 0 - (bfd_vma) u.u_ar0;
204 core_datasec (abfd)->filepos = NBPG * UPAGES;
205 core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize
206 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
210 core_regsec (abfd)->filepos = 0; /* Register segment is the upage */
212 /* Align to word at least */
213 core_stacksec (abfd)->alignment_power = 2;
214 core_datasec (abfd)->alignment_power = 2;
215 core_regsec (abfd)->alignment_power = 2;
217 abfd->sections = core_stacksec (abfd);
218 core_stacksec (abfd)->next = core_datasec (abfd);
219 core_datasec (abfd)->next = core_regsec (abfd);
220 abfd->section_count = 3;
226 trad_unix_core_file_failing_command (abfd)
229 #ifndef NO_CORE_COMMAND
230 char *com = abfd->tdata.trad_core_data->u.u_comm;
240 trad_unix_core_file_failing_signal (ignore_abfd)
243 #ifdef TRAD_UNIX_CORE_FILE_FAILING_SIGNAL
244 return TRAD_UNIX_CORE_FILE_FAILING_SIGNAL(ignore_abfd);
246 return -1; /* FIXME, where is it? */
252 trad_unix_core_file_matches_executable_p (core_bfd, exec_bfd)
253 bfd *core_bfd, *exec_bfd;
255 return true; /* FIXME, We have no way of telling at this point */
258 /* If somebody calls any byte-swapping routines, shoot them. */
262 abort(); /* This way doesn't require any declaration for ANSI to fuck up */
264 #define NO_GET ((bfd_vma (*) PARAMS (( const bfd_byte *))) swap_abort )
265 #define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
266 #define NO_SIGNED_GET \
267 ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
269 const bfd_target trad_core_vec =
272 bfd_target_unknown_flavour,
273 BFD_ENDIAN_UNKNOWN, /* target byte order */
274 BFD_ENDIAN_UNKNOWN, /* target headers byte order */
275 (HAS_RELOC | EXEC_P | /* object flags */
276 HAS_LINENO | HAS_DEBUG |
277 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
278 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
279 0, /* symbol prefix */
280 ' ', /* ar_pad_char */
281 16, /* ar_max_namelen */
282 NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */
283 NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */
284 NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */
285 NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */
286 NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */
287 NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */
289 { /* bfd_check_format */
290 _bfd_dummy_target, /* unknown format */
291 _bfd_dummy_target, /* object file */
292 _bfd_dummy_target, /* archive */
293 trad_unix_core_file_p /* a core file */
295 { /* bfd_set_format */
296 bfd_false, bfd_false,
299 { /* bfd_write_contents */
300 bfd_false, bfd_false,
304 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
305 BFD_JUMP_TABLE_COPY (_bfd_generic),
306 BFD_JUMP_TABLE_CORE (trad_unix),
307 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
308 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
309 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
310 BFD_JUMP_TABLE_WRITE (_bfd_generic),
311 BFD_JUMP_TABLE_LINK (_bfd_nolink),
312 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
314 (PTR) 0 /* backend_data */