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_error = wrong_format;
97 /* Sanity check perhaps??? */
98 if (u.u_dsize > 0x1000000) /* Remember, it's in pages... */
100 bfd_error = wrong_format;
103 if (u.u_ssize > 0x1000000)
105 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_error = system_call_error;
120 if (NBPG * (UPAGES + u.u_dsize + u.u_ssize) > statbuf.st_size)
122 bfd_error = file_truncated;
125 #ifndef TRAD_CORE_ALLOW_ANY_EXTRA_SIZE
126 if (NBPG * (UPAGES + u.u_dsize + u.u_ssize)
127 #ifdef TRAD_CORE_EXTRA_SIZE_ALLOWED
128 /* Some systems write the file too big. */
129 + TRAD_CORE_EXTRA_SIZE_ALLOWED
133 /* The file is too big. Maybe it's not a core file
134 or we otherwise have bad values for u_dsize and u_ssize). */
135 bfd_error = wrong_format;
141 /* OK, we believe you. You're a core file (sure, sure). */
143 /* Allocate both the upage and the struct core_data at once, so
144 a single free() will free them both. */
145 rawptr = (struct trad_core_struct *)
146 bfd_zalloc (abfd, sizeof (struct trad_core_struct));
147 if (rawptr == NULL) {
148 bfd_error = no_memory;
152 abfd->tdata.trad_core_data = rawptr;
154 rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */
156 /* Create the sections. This is raunchy, but bfd_close wants to free
159 core_stacksec(abfd) = (asection *) zalloc (sizeof (asection));
160 if (core_stacksec (abfd) == NULL) {
162 bfd_error = no_memory;
163 free ((void *)rawptr);
166 core_datasec (abfd) = (asection *) zalloc (sizeof (asection));
167 if (core_datasec (abfd) == NULL) {
169 free ((void *)core_stacksec (abfd));
172 core_regsec (abfd) = (asection *) zalloc (sizeof (asection));
173 if (core_regsec (abfd) == NULL) {
174 free ((void *)core_datasec (abfd));
178 core_stacksec (abfd)->name = ".stack";
179 core_datasec (abfd)->name = ".data";
180 core_regsec (abfd)->name = ".reg";
182 core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
183 core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
184 core_regsec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
186 core_datasec (abfd)->_raw_size = NBPG * u.u_dsize;
187 core_stacksec (abfd)->_raw_size = NBPG * u.u_ssize;
188 core_regsec (abfd)->_raw_size = NBPG * UPAGES; /* Larger than sizeof struct u */
190 /* What a hack... we'd like to steal it from the exec file,
191 since the upage does not seem to provide it. FIXME. */
192 #ifdef HOST_DATA_START_ADDR
193 core_datasec (abfd)->vma = HOST_DATA_START_ADDR;
195 core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize);
198 #ifdef HOST_STACK_START_ADDR
199 core_stacksec (abfd)->vma = HOST_STACK_START_ADDR;
201 core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize);
204 /* This is tricky. As the "register section", we give them the entire
205 upage and stack. u.u_ar0 points to where "register 0" is stored.
206 There are two tricks with this, though. One is that the rest of the
207 registers might be at positive or negative (or both) displacements
208 from *u_ar0. The other is that u_ar0 is sometimes an absolute address
209 in kernel memory, and on other systems it is an offset from the beginning
210 of the `struct user'.
212 As a practical matter, we don't know where the registers actually are,
213 so we have to pass the whole area to GDB. We encode the value of u_ar0
214 by setting the .regs section up so that its virtual memory address
215 0 is at the place pointed to by u_ar0 (by setting the vma of the start
216 of the section to -u_ar0). GDB uses this info to locate the regs,
217 using minor trickery to get around the offset-or-absolute-addr problem. */
218 core_regsec (abfd)->vma = 0 - (int) u.u_ar0;
220 core_datasec (abfd)->filepos = NBPG * UPAGES;
221 #ifdef TRAD_CORE_STACK_FILEPOS
222 core_stacksec (abfd)->filepos = TRAD_CORE_STACK_FILEPOS;
224 core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize;
226 core_regsec (abfd)->filepos = 0; /* Register segment is the upage */
228 /* Align to word at least */
229 core_stacksec (abfd)->alignment_power = 2;
230 core_datasec (abfd)->alignment_power = 2;
231 core_regsec (abfd)->alignment_power = 2;
233 abfd->sections = core_stacksec (abfd);
234 core_stacksec (abfd)->next = core_datasec (abfd);
235 core_datasec (abfd)->next = core_regsec (abfd);
236 abfd->section_count = 3;
242 trad_unix_core_file_failing_command (abfd)
245 #ifndef NO_CORE_COMMAND
246 char *com = abfd->tdata.trad_core_data->u.u_comm;
256 trad_unix_core_file_failing_signal (ignore_abfd)
259 #ifdef TRAD_UNIX_CORE_FILE_FAILING_SIGNAL
260 return TRAD_UNIX_CORE_FILE_FAILING_SIGNAL(ignore_abfd);
262 return -1; /* FIXME, where is it? */
268 trad_unix_core_file_matches_executable_p (core_bfd, exec_bfd)
269 bfd *core_bfd, *exec_bfd;
271 return true; /* FIXME, We have no way of telling at this point */
274 /* No archive file support via this BFD */
275 #define trad_unix_openr_next_archived_file bfd_generic_openr_next_archived_file
276 #define trad_unix_generic_stat_arch_elt bfd_generic_stat_arch_elt
277 #define trad_unix_slurp_armap bfd_false
278 #define trad_unix_slurp_extended_name_table bfd_true
279 #define trad_unix_write_armap (boolean (*) PARAMS \
280 ((bfd *arch, unsigned int elength, struct orl *map, \
281 unsigned int orl_count, int stridx))) bfd_false
282 #define trad_unix_truncate_arname bfd_dont_truncate_arname
283 #define aout_32_openr_next_archived_file bfd_generic_openr_next_archived_file
285 #define trad_unix_close_and_cleanup bfd_generic_close_and_cleanup
286 #define trad_unix_set_section_contents (boolean (*) PARAMS \
287 ((bfd *abfd, asection *section, PTR data, file_ptr offset, \
288 bfd_size_type count))) bfd_false
289 #define trad_unix_get_section_contents bfd_generic_get_section_contents
290 #define trad_unix_new_section_hook (boolean (*) PARAMS \
291 ((bfd *, sec_ptr))) bfd_true
292 #define trad_unix_get_symtab_upper_bound bfd_0u
293 #define trad_unix_get_symtab (unsigned int (*) PARAMS \
294 ((bfd *, struct symbol_cache_entry **))) bfd_0u
295 #define trad_unix_get_reloc_upper_bound (unsigned int (*) PARAMS \
296 ((bfd *, sec_ptr))) bfd_0u
297 #define trad_unix_canonicalize_reloc (unsigned int (*) PARAMS \
298 ((bfd *, sec_ptr, arelent **, struct symbol_cache_entry**))) bfd_0u
299 #define trad_unix_make_empty_symbol (struct symbol_cache_entry * \
300 (*) PARAMS ((bfd *))) bfd_false
301 #define trad_unix_print_symbol (void (*) PARAMS \
302 ((bfd *, PTR, struct symbol_cache_entry *, \
303 bfd_print_symbol_type))) bfd_false
304 #define trad_unix_get_symbol_info (void (*) PARAMS \
305 ((bfd *, struct symbol_cache_entry *, \
306 symbol_info *))) bfd_false
307 #define trad_unix_get_lineno (alent * (*) PARAMS \
308 ((bfd *, struct symbol_cache_entry *))) bfd_nullvoidptr
309 #define trad_unix_set_arch_mach (boolean (*) PARAMS \
310 ((bfd *, enum bfd_architecture, unsigned long))) bfd_false
311 #define trad_unix_find_nearest_line (boolean (*) PARAMS \
312 ((bfd *abfd, struct sec *section, \
313 struct symbol_cache_entry **symbols,bfd_vma offset, \
314 CONST char **file, CONST char **func, unsigned int *line))) bfd_false
315 #define trad_unix_sizeof_headers (int (*) PARAMS \
316 ((bfd *, boolean))) bfd_0
318 #define trad_unix_bfd_debug_info_start bfd_void
319 #define trad_unix_bfd_debug_info_end bfd_void
320 #define trad_unix_bfd_debug_info_accumulate (void (*) PARAMS \
321 ((bfd *, struct sec *))) bfd_void
322 #define trad_unix_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
323 #define trad_unix_bfd_relax_section bfd_generic_relax_section
324 #define trad_unix_bfd_reloc_type_lookup \
325 ((CONST struct reloc_howto_struct *(*) PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)
326 #define trad_unix_bfd_make_debug_symbol \
327 ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
328 #define trad_unix_bfd_link_hash_table_create \
329 ((struct bfd_link_hash_table *(*) PARAMS ((bfd *))) bfd_nullvoidptr)
330 #define trad_unix_bfd_link_add_symbols \
331 ((boolean (*) PARAMS ((bfd *, struct bfd_link_info *))) bfd_false)
332 #define trad_unix_bfd_final_link \
333 ((boolean (*) PARAMS ((bfd *, struct bfd_link_info *))) bfd_false)
335 /* If somebody calls any byte-swapping routines, shoot them. */
339 abort(); /* This way doesn't require any declaration for ANSI to fuck up */
341 #define NO_GET ((bfd_vma (*) PARAMS (( bfd_byte *))) swap_abort )
342 #define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
343 #define NO_SIGNED_GET ((bfd_signed_vma (*) PARAMS ((bfd_byte *))) swap_abort )
345 bfd_target trad_core_vec =
348 bfd_target_unknown_flavour,
349 true, /* target byte order */
350 true, /* target headers byte order */
351 (HAS_RELOC | EXEC_P | /* object flags */
352 HAS_LINENO | HAS_DEBUG |
353 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
354 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
355 0, /* symbol prefix */
356 ' ', /* ar_pad_char */
357 16, /* ar_max_namelen */
358 3, /* minimum alignment power */
359 NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */
360 NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */
361 NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */
362 NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */
363 NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */
364 NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */
366 { /* bfd_check_format */
367 _bfd_dummy_target, /* unknown format */
368 _bfd_dummy_target, /* object file */
369 _bfd_dummy_target, /* archive */
370 trad_unix_core_file_p /* a core file */
372 { /* bfd_set_format */
373 bfd_false, bfd_false,
376 { /* bfd_write_contents */
377 bfd_false, bfd_false,
381 JUMP_TABLE(trad_unix),
382 (PTR) 0 /* backend_data */