* ldexp.c (fold_binary): Set result section for arithmetic and
[binutils.git] / bfd / trad-core.c
blobe06b56151f4b6872ac561a7637507ea6f0ec0917
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, 2005, 2006, 2007
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 3 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., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
24 #include "sysdep.h"
25 #include "bfd.h"
26 #include "libbfd.h"
27 #include "libaout.h" /* BFD a.out internal data structures */
29 #include <sys/param.h>
30 #ifdef HAVE_DIRENT_H
31 # include <dirent.h>
32 #else
33 # ifdef HAVE_SYS_NDIR_H
34 # include <sys/ndir.h>
35 # endif
36 # ifdef HAVE_SYS_DIR_H
37 # include <sys/dir.h>
38 # endif
39 # ifdef HAVE_NDIR_H
40 # include <ndir.h>
41 # endif
42 #endif
43 #include <signal.h>
45 #include <sys/user.h> /* After a.out.h */
47 #ifdef TRAD_HEADER
48 #include TRAD_HEADER
49 #endif
51 #ifndef NBPG
52 # define NBPG getpagesize()
53 #endif
55 struct trad_core_struct
57 asection *data_section;
58 asection *stack_section;
59 asection *reg_section;
60 struct user u;
63 #define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
64 #define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
65 #define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
66 #define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)
68 /* forward declarations */
70 const bfd_target *trad_unix_core_file_p PARAMS ((bfd *abfd));
71 char * trad_unix_core_file_failing_command PARAMS ((bfd *abfd));
72 int trad_unix_core_file_failing_signal PARAMS ((bfd *abfd));
73 #define trad_unix_core_file_matches_executable_p generic_core_file_matches_executable_p
74 #define trad_unix_core_file_pid _bfd_nocore_core_file_pid
75 static void swap_abort PARAMS ((void));
77 /* Handle 4.2-style (and perhaps also sysV-style) core dump file. */
79 const bfd_target *
80 trad_unix_core_file_p (abfd)
81 bfd *abfd;
84 int val;
85 struct user u;
86 struct trad_core_struct *rawptr;
87 bfd_size_type amt;
88 flagword flags;
90 #ifdef TRAD_CORE_USER_OFFSET
91 /* If defined, this macro is the file position of the user struct. */
92 if (bfd_seek (abfd, (file_ptr) TRAD_CORE_USER_OFFSET, SEEK_SET) != 0)
93 return 0;
94 #endif
96 val = bfd_bread ((void *) &u, (bfd_size_type) sizeof u, abfd);
97 if (val != sizeof u)
99 /* Too small to be a core file */
100 bfd_set_error (bfd_error_wrong_format);
101 return 0;
104 /* Sanity check perhaps??? */
105 if (u.u_dsize > 0x1000000) /* Remember, it's in pages... */
107 bfd_set_error (bfd_error_wrong_format);
108 return 0;
110 if (u.u_ssize > 0x1000000)
112 bfd_set_error (bfd_error_wrong_format);
113 return 0;
116 /* Check that the size claimed is no greater than the file size. */
118 struct stat statbuf;
120 if (bfd_stat (abfd, &statbuf) < 0)
121 return 0;
123 if ((ufile_ptr) NBPG * (UPAGES + u.u_dsize
124 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
125 - u.u_tsize
126 #endif
127 + u.u_ssize)
128 > (ufile_ptr) statbuf.st_size)
130 bfd_set_error (bfd_error_wrong_format);
131 return 0;
133 #ifndef TRAD_CORE_ALLOW_ANY_EXTRA_SIZE
134 if (((ufile_ptr) NBPG * (UPAGES + u.u_dsize + u.u_ssize)
135 #ifdef TRAD_CORE_EXTRA_SIZE_ALLOWED
136 /* Some systems write the file too big. */
137 + TRAD_CORE_EXTRA_SIZE_ALLOWED
138 #endif
140 < (ufile_ptr) statbuf.st_size)
142 /* The file is too big. Maybe it's not a core file
143 or we otherwise have bad values for u_dsize and u_ssize). */
144 bfd_set_error (bfd_error_wrong_format);
145 return 0;
147 #endif
150 /* OK, we believe you. You're a core file (sure, sure). */
152 /* Allocate both the upage and the struct core_data at once, so
153 a single free() will free them both. */
154 amt = sizeof (struct trad_core_struct);
155 rawptr = (struct trad_core_struct *) bfd_zmalloc (amt);
156 if (rawptr == NULL)
157 return 0;
159 abfd->tdata.trad_core_data = rawptr;
161 rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */
163 /* Create the sections. */
165 flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
166 core_stacksec(abfd) = bfd_make_section_anyway_with_flags (abfd, ".stack",
167 flags);
168 if (core_stacksec (abfd) == NULL)
169 goto fail;
170 core_datasec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".data",
171 flags);
172 if (core_datasec (abfd) == NULL)
173 goto fail;
174 core_regsec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".reg",
175 SEC_HAS_CONTENTS);
176 if (core_regsec (abfd) == NULL)
177 goto fail;
179 core_datasec (abfd)->size = NBPG * u.u_dsize
180 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
181 - NBPG * u.u_tsize
182 #endif
184 core_stacksec (abfd)->size = NBPG * u.u_ssize;
185 core_regsec (abfd)->size = NBPG * UPAGES; /* Larger than sizeof struct u */
187 /* What a hack... we'd like to steal it from the exec file,
188 since the upage does not seem to provide it. FIXME. */
189 #ifdef HOST_DATA_START_ADDR
190 core_datasec (abfd)->vma = HOST_DATA_START_ADDR;
191 #else
192 core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize);
193 #endif
195 #ifdef HOST_STACK_START_ADDR
196 core_stacksec (abfd)->vma = HOST_STACK_START_ADDR;
197 #else
198 core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize);
199 #endif
201 /* This is tricky. As the "register section", we give them the entire
202 upage and stack. u.u_ar0 points to where "register 0" is stored.
203 There are two tricks with this, though. One is that the rest of the
204 registers might be at positive or negative (or both) displacements
205 from *u_ar0. The other is that u_ar0 is sometimes an absolute address
206 in kernel memory, and on other systems it is an offset from the beginning
207 of the `struct user'.
209 As a practical matter, we don't know where the registers actually are,
210 so we have to pass the whole area to GDB. We encode the value of u_ar0
211 by setting the .regs section up so that its virtual memory address
212 0 is at the place pointed to by u_ar0 (by setting the vma of the start
213 of the section to -u_ar0). GDB uses this info to locate the regs,
214 using minor trickery to get around the offset-or-absolute-addr problem. */
215 core_regsec (abfd)->vma = - (bfd_vma) (unsigned long) u.u_ar0;
217 core_datasec (abfd)->filepos = NBPG * UPAGES;
218 core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize
219 #ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE
220 - NBPG * u.u_tsize
221 #endif
223 core_regsec (abfd)->filepos = 0; /* Register segment is the upage */
225 /* Align to word at least */
226 core_stacksec (abfd)->alignment_power = 2;
227 core_datasec (abfd)->alignment_power = 2;
228 core_regsec (abfd)->alignment_power = 2;
230 return abfd->xvec;
232 fail:
233 bfd_release (abfd, abfd->tdata.any);
234 abfd->tdata.any = NULL;
235 bfd_section_list_clear (abfd);
236 return NULL;
239 char *
240 trad_unix_core_file_failing_command (abfd)
241 bfd *abfd;
243 #ifndef NO_CORE_COMMAND
244 char *com = abfd->tdata.trad_core_data->u.u_comm;
245 if (*com)
246 return com;
247 else
248 #endif
249 return 0;
253 trad_unix_core_file_failing_signal (ignore_abfd)
254 bfd *ignore_abfd ATTRIBUTE_UNUSED;
256 #ifdef TRAD_UNIX_CORE_FILE_FAILING_SIGNAL
257 return TRAD_UNIX_CORE_FILE_FAILING_SIGNAL(ignore_abfd);
258 #else
259 return -1; /* FIXME, where is it? */
260 #endif
263 /* If somebody calls any byte-swapping routines, shoot them. */
264 static void
265 swap_abort ()
267 abort (); /* This way doesn't require any declaration for ANSI to fuck up */
270 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
271 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
272 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
273 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
274 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
275 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
277 const bfd_target trad_core_vec =
279 "trad-core",
280 bfd_target_unknown_flavour,
281 BFD_ENDIAN_UNKNOWN, /* target byte order */
282 BFD_ENDIAN_UNKNOWN, /* target headers byte order */
283 (HAS_RELOC | EXEC_P | /* object flags */
284 HAS_LINENO | HAS_DEBUG |
285 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
286 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
287 0, /* symbol prefix */
288 ' ', /* ar_pad_char */
289 16, /* ar_max_namelen */
290 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
291 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
292 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
293 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
294 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
295 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
297 { /* bfd_check_format */
298 _bfd_dummy_target, /* unknown format */
299 _bfd_dummy_target, /* object file */
300 _bfd_dummy_target, /* archive */
301 trad_unix_core_file_p /* a core file */
303 { /* bfd_set_format */
304 bfd_false, bfd_false,
305 bfd_false, bfd_false
307 { /* bfd_write_contents */
308 bfd_false, bfd_false,
309 bfd_false, bfd_false
312 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
313 BFD_JUMP_TABLE_COPY (_bfd_generic),
314 BFD_JUMP_TABLE_CORE (trad_unix),
315 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
316 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
317 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
318 BFD_JUMP_TABLE_WRITE (_bfd_generic),
319 BFD_JUMP_TABLE_LINK (_bfd_nolink),
320 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
322 NULL,
324 (PTR) 0 /* backend_data */