1 /* BFD back end for traditional Unix core files (U-area and raw sections)
2 Copyright 1988, 1989, 1991, 1992, 1993 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* To use this file on a particular host, configure the host with these
22 parameters in the config/h-HOST file:
32 #include "libaout.h" /* BFD a.out internal data structures */
35 #include <sys/types.h>
36 #include <sys/param.h>
40 #include <sys/user.h> /* After a.out.h */
42 /* file.h is included by std-host.h. So we better not try to include it
43 twice; on some systems (dpx2) it is not protected against multiple
44 inclusion. I have checked that all the hosts which use this file
45 include sys/file.h in the hosts file. */
51 struct trad_core_struct
53 asection *data_section;
54 asection *stack_section;
55 asection *reg_section;
59 #define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
60 #define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
61 #define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
62 #define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)
64 /* forward declarations */
66 bfd_target * trad_unix_core_file_p PARAMS ((bfd *abfd));
67 char * trad_unix_core_file_failing_command PARAMS ((bfd *abfd));
68 int trad_unix_core_file_failing_signal PARAMS ((bfd *abfd));
69 boolean trad_unix_core_file_matches_executable_p
70 PARAMS ((bfd *core_bfd, bfd *exec_bfd));
72 /* Handle 4.2-style (and perhaps also sysV-style) core dump file. */
76 trad_unix_core_file_p (abfd)
83 #ifdef TRAD_CORE_USER_OFFSET
84 /* If defined, this macro is the file position of the user struct. */
85 if (bfd_seek (abfd, TRAD_CORE_USER_OFFSET, SEEK_SET) != 0)
89 val = bfd_read ((void *)&u, 1, sizeof u, abfd);
92 /* Too small to be a core file */
93 bfd_set_error (bfd_error_wrong_format);
97 /* Sanity check perhaps??? */
98 if (u.u_dsize > 0x1000000) /* Remember, it's in pages... */
100 bfd_set_error (bfd_error_wrong_format);
103 if (u.u_ssize > 0x1000000)
105 bfd_set_error (bfd_error_wrong_format);
109 /* Check that the size claimed is no greater than the file size. */
111 FILE *stream = bfd_cache_lookup (abfd);
115 if (fstat (fileno (stream), &statbuf) < 0)
117 bfd_set_error (bfd_error_system_call);
120 if (NBPG * (UPAGES + u.u_dsize
121 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
124 + u.u_ssize) > statbuf.st_size)
126 bfd_set_error (bfd_error_file_truncated);
129 #ifndef TRAD_CORE_ALLOW_ANY_EXTRA_SIZE
130 if (NBPG * (UPAGES + u.u_dsize + u.u_ssize)
131 #ifdef TRAD_CORE_EXTRA_SIZE_ALLOWED
132 /* Some systems write the file too big. */
133 + TRAD_CORE_EXTRA_SIZE_ALLOWED
137 /* The file is too big. Maybe it's not a core file
138 or we otherwise have bad values for u_dsize and u_ssize). */
139 bfd_set_error (bfd_error_wrong_format);
145 /* OK, we believe you. You're a core file (sure, sure). */
147 /* Allocate both the upage and the struct core_data at once, so
148 a single free() will free them both. */
149 rawptr = (struct trad_core_struct *)
150 bfd_zmalloc (abfd, sizeof (struct trad_core_struct));
151 if (rawptr == NULL) {
152 bfd_set_error (bfd_error_no_memory);
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. This is raunchy, but bfd_close wants to free
163 core_stacksec(abfd) = (asection *) bfd_zmalloc (sizeof (asection));
164 if (core_stacksec (abfd) == NULL) {
166 bfd_set_error (bfd_error_no_memory);
167 free ((void *)rawptr);
170 core_datasec (abfd) = (asection *) bfd_zmalloc (sizeof (asection));
171 if (core_datasec (abfd) == NULL) {
173 free ((void *)core_stacksec (abfd));
176 core_regsec (abfd) = (asection *) bfd_zmalloc (sizeof (asection));
177 if (core_regsec (abfd) == NULL) {
178 free ((void *)core_datasec (abfd));
182 core_stacksec (abfd)->name = ".stack";
183 core_datasec (abfd)->name = ".data";
184 core_regsec (abfd)->name = ".reg";
186 core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
187 core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
188 core_regsec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
190 core_datasec (abfd)->_raw_size = NBPG * u.u_dsize
191 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
195 core_stacksec (abfd)->_raw_size = NBPG * u.u_ssize;
196 core_regsec (abfd)->_raw_size = NBPG * UPAGES; /* Larger than sizeof struct u */
198 /* What a hack... we'd like to steal it from the exec file,
199 since the upage does not seem to provide it. FIXME. */
200 #ifdef HOST_DATA_START_ADDR
201 core_datasec (abfd)->vma = HOST_DATA_START_ADDR;
203 core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize);
206 #ifdef HOST_STACK_START_ADDR
207 core_stacksec (abfd)->vma = HOST_STACK_START_ADDR;
209 core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize);
212 /* This is tricky. As the "register section", we give them the entire
213 upage and stack. u.u_ar0 points to where "register 0" is stored.
214 There are two tricks with this, though. One is that the rest of the
215 registers might be at positive or negative (or both) displacements
216 from *u_ar0. The other is that u_ar0 is sometimes an absolute address
217 in kernel memory, and on other systems it is an offset from the beginning
218 of the `struct user'.
220 As a practical matter, we don't know where the registers actually are,
221 so we have to pass the whole area to GDB. We encode the value of u_ar0
222 by setting the .regs section up so that its virtual memory address
223 0 is at the place pointed to by u_ar0 (by setting the vma of the start
224 of the section to -u_ar0). GDB uses this info to locate the regs,
225 using minor trickery to get around the offset-or-absolute-addr problem. */
226 core_regsec (abfd)->vma = 0 - (int) u.u_ar0;
228 core_datasec (abfd)->filepos = NBPG * UPAGES;
229 core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize
230 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
234 core_regsec (abfd)->filepos = 0; /* Register segment is the upage */
236 /* Align to word at least */
237 core_stacksec (abfd)->alignment_power = 2;
238 core_datasec (abfd)->alignment_power = 2;
239 core_regsec (abfd)->alignment_power = 2;
241 abfd->sections = core_stacksec (abfd);
242 core_stacksec (abfd)->next = core_datasec (abfd);
243 core_datasec (abfd)->next = core_regsec (abfd);
244 abfd->section_count = 3;
250 trad_unix_core_file_failing_command (abfd)
253 #ifndef NO_CORE_COMMAND
254 char *com = abfd->tdata.trad_core_data->u.u_comm;
264 trad_unix_core_file_failing_signal (ignore_abfd)
267 #ifdef TRAD_UNIX_CORE_FILE_FAILING_SIGNAL
268 return TRAD_UNIX_CORE_FILE_FAILING_SIGNAL(ignore_abfd);
270 return -1; /* FIXME, where is it? */
276 trad_unix_core_file_matches_executable_p (core_bfd, exec_bfd)
277 bfd *core_bfd, *exec_bfd;
279 return true; /* FIXME, We have no way of telling at this point */
282 /* No archive file support via this BFD */
283 #define trad_unix_openr_next_archived_file bfd_generic_openr_next_archived_file
284 #define trad_unix_generic_stat_arch_elt bfd_generic_stat_arch_elt
285 #define trad_unix_slurp_armap bfd_false
286 #define trad_unix_slurp_extended_name_table bfd_true
287 #define trad_unix_write_armap (boolean (*) PARAMS \
288 ((bfd *arch, unsigned int elength, struct orl *map, \
289 unsigned int orl_count, int stridx))) bfd_false
290 #define trad_unix_truncate_arname bfd_dont_truncate_arname
291 #define aout_32_openr_next_archived_file bfd_generic_openr_next_archived_file
293 #define trad_unix_close_and_cleanup bfd_generic_close_and_cleanup
294 #define trad_unix_set_section_contents (boolean (*) PARAMS \
295 ((bfd *abfd, asection *section, PTR data, file_ptr offset, \
296 bfd_size_type count))) bfd_generic_set_section_contents
297 #define trad_unix_get_section_contents bfd_generic_get_section_contents
298 #define trad_unix_new_section_hook (boolean (*) PARAMS \
299 ((bfd *, sec_ptr))) bfd_true
300 #define trad_unix_get_symtab_upper_bound bfd_0u
301 #define trad_unix_get_symtab (unsigned int (*) PARAMS \
302 ((bfd *, struct symbol_cache_entry **))) bfd_0u
303 #define trad_unix_get_reloc_upper_bound (unsigned int (*) PARAMS \
304 ((bfd *, sec_ptr))) bfd_0u
305 #define trad_unix_canonicalize_reloc (unsigned int (*) PARAMS \
306 ((bfd *, sec_ptr, arelent **, struct symbol_cache_entry**))) bfd_0u
307 #define trad_unix_make_empty_symbol (struct symbol_cache_entry * \
308 (*) PARAMS ((bfd *))) bfd_false
309 #define trad_unix_print_symbol (void (*) PARAMS \
310 ((bfd *, PTR, struct symbol_cache_entry *, \
311 bfd_print_symbol_type))) bfd_false
312 #define trad_unix_get_symbol_info (void (*) PARAMS \
313 ((bfd *, struct symbol_cache_entry *, \
314 symbol_info *))) bfd_false
315 #define trad_unix_get_lineno (alent * (*) PARAMS \
316 ((bfd *, struct symbol_cache_entry *))) bfd_nullvoidptr
317 #define trad_unix_set_arch_mach (boolean (*) PARAMS \
318 ((bfd *, enum bfd_architecture, unsigned long))) bfd_false
319 #define trad_unix_find_nearest_line (boolean (*) PARAMS \
320 ((bfd *abfd, struct sec *section, \
321 struct symbol_cache_entry **symbols,bfd_vma offset, \
322 CONST char **file, CONST char **func, unsigned int *line))) bfd_false
323 #define trad_unix_sizeof_headers (int (*) PARAMS \
324 ((bfd *, boolean))) bfd_0
326 #define trad_unix_bfd_debug_info_start bfd_void
327 #define trad_unix_bfd_debug_info_end bfd_void
328 #define trad_unix_bfd_debug_info_accumulate (void (*) PARAMS \
329 ((bfd *, struct sec *))) bfd_void
330 #define trad_unix_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
331 #define trad_unix_bfd_relax_section bfd_generic_relax_section
332 #define trad_unix_bfd_reloc_type_lookup \
333 ((CONST struct reloc_howto_struct *(*) PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)
334 #define trad_unix_bfd_make_debug_symbol \
335 ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
336 #define trad_unix_bfd_link_hash_table_create \
337 ((struct bfd_link_hash_table *(*) PARAMS ((bfd *))) bfd_nullvoidptr)
338 #define trad_unix_bfd_link_add_symbols \
339 ((boolean (*) PARAMS ((bfd *, struct bfd_link_info *))) bfd_false)
340 #define trad_unix_bfd_final_link \
341 ((boolean (*) PARAMS ((bfd *, struct bfd_link_info *))) bfd_false)
342 #define trad_unix_bfd_copy_private_section_data \
343 ((boolean (*) PARAMS ((bfd *, asection *, bfd *, asection *))) bfd_false)
344 #define trad_unix_bfd_copy_private_bfd_data \
345 ((boolean (*) PARAMS ((bfd *, bfd *))) bfd_false)
346 #define trad_unix_bfd_is_local_label \
347 ((boolean (*) PARAMS ((bfd *, asection *))) bfd_false)
349 /* If somebody calls any byte-swapping routines, shoot them. */
353 abort(); /* This way doesn't require any declaration for ANSI to fuck up */
355 #define NO_GET ((bfd_vma (*) PARAMS (( const bfd_byte *))) swap_abort )
356 #define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
357 #define NO_SIGNED_GET \
358 ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
360 bfd_target trad_core_vec =
363 bfd_target_unknown_flavour,
364 true, /* target byte order */
365 true, /* target headers byte order */
366 (HAS_RELOC | EXEC_P | /* object flags */
367 HAS_LINENO | HAS_DEBUG |
368 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
369 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
370 0, /* symbol prefix */
371 ' ', /* ar_pad_char */
372 16, /* ar_max_namelen */
373 3, /* minimum alignment power */
374 NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */
375 NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */
376 NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */
377 NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */
378 NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */
379 NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */
381 { /* bfd_check_format */
382 _bfd_dummy_target, /* unknown format */
383 _bfd_dummy_target, /* object file */
384 _bfd_dummy_target, /* archive */
385 trad_unix_core_file_p /* a core file */
387 { /* bfd_set_format */
388 bfd_false, bfd_false,
391 { /* bfd_write_contents */
392 bfd_false, bfd_false,
396 JUMP_TABLE(trad_unix),
397 (PTR) 0 /* backend_data */