bfd/
[binutils.git] / bfd / hpux-core.c
blobe8a5e31b1ecc899cd17e561f567f33a97f86c6be
1 /* BFD back-end for HP/UX core files.
2 Copyright 1993, 1994, 1996, 1998, 1999, 2001, 2002, 2003, 2004, 2006
3 Free Software Foundation, Inc.
4 Written by Stu Grossman, Cygnus Support.
5 Converted to back-end form by Ian Lance Taylor, 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
23 /* This file can only be compiled on systems which use HP/UX style
24 core files. */
26 #include "bfd.h"
27 #include "sysdep.h"
28 #include "libbfd.h"
30 #if defined (HOST_HPPAHPUX) || defined (HOST_HP300HPUX) || defined (HOST_HPPAMPEIX)
32 /* FIXME: sys/core.h doesn't exist for HPUX version 7. HPUX version
33 5, 6, and 7 core files seem to be standard trad-core.c type core
34 files; can we just use trad-core.c in addition to this file? */
36 #include <sys/core.h>
37 #include <sys/utsname.h>
39 #endif /* HOST_HPPAHPUX */
41 #ifdef HOST_HPPABSD
43 /* Not a very swift place to put it, but that's where the BSD port
44 puts them. */
45 #include "/hpux/usr/include/sys/core.h"
47 #endif /* HOST_HPPABSD */
49 #include <sys/param.h>
50 #ifdef HAVE_DIRENT_H
51 # include <dirent.h>
52 #else
53 # ifdef HAVE_SYS_NDIR_H
54 # include <sys/ndir.h>
55 # endif
56 # ifdef HAVE_SYS_DIR_H
57 # include <sys/dir.h>
58 # endif
59 # ifdef HAVE_NDIR_H
60 # include <ndir.h>
61 # endif
62 #endif
63 #include <signal.h>
64 #ifdef HPUX_CORE
65 #include <machine/reg.h>
66 #endif
67 #include <sys/user.h> /* After a.out.h */
68 #include <sys/file.h>
70 /* Kludge: There's no explicit mechanism provided by sys/core.h to
71 conditionally know whether a proc_info has thread id fields.
72 However, CORE_ANON_SHMEM shows up first at 10.30, which is
73 happily also when meaningful thread id's show up in proc_info. */
74 #if defined(CORE_ANON_SHMEM)
75 #define PROC_INFO_HAS_THREAD_ID (1)
76 #endif
78 /* This type appears at HP-UX 10.30. Defining it if not defined
79 by sys/core.h allows us to build for older HP-UX's, and (since
80 it won't be encountered in core-dumps from older HP-UX's) is
81 harmless. */
82 #if !defined(CORE_ANON_SHMEM)
83 #define CORE_ANON_SHMEM 0x00000200 /* anonymous shared memory */
84 #endif
86 /* These are stored in the bfd's tdata */
88 /* .lwpid and .user_tid are only valid if PROC_INFO_HAS_THREAD_ID, else they
89 are set to 0. Also, until HP-UX implements MxN threads, .user_tid and
90 .lwpid are synonymous. */
91 struct hpux_core_struct
93 int sig;
94 int lwpid; /* Kernel thread ID. */
95 unsigned long user_tid; /* User thread ID. */
96 char cmd[MAXCOMLEN + 1];
99 #define core_hdr(bfd) ((bfd)->tdata.hpux_core_data)
100 #define core_signal(bfd) (core_hdr(bfd)->sig)
101 #define core_command(bfd) (core_hdr(bfd)->cmd)
102 #define core_kernel_thread_id(bfd) (core_hdr(bfd)->lwpid)
103 #define core_user_thread_id(bfd) (core_hdr(bfd)->user_tid)
104 #define hpux_core_core_file_matches_executable_p generic_core_file_matches_executable_p
106 static asection *make_bfd_asection (bfd *, const char *, flagword,
107 bfd_size_type, bfd_vma, unsigned int);
108 static const bfd_target *hpux_core_core_file_p (bfd *);
109 static char *hpux_core_core_file_failing_command (bfd *);
110 static int hpux_core_core_file_failing_signal (bfd *);
111 static void swap_abort (void);
113 static asection *
114 make_bfd_asection (bfd *abfd, const char *name, flagword flags,
115 bfd_size_type size, bfd_vma vma,
116 unsigned int alignment_power)
118 asection *asect;
119 char *newname;
121 newname = bfd_alloc (abfd, (bfd_size_type) strlen (name) + 1);
122 if (!newname)
123 return NULL;
125 strcpy (newname, name);
127 asect = bfd_make_section_anyway_with_flags (abfd, newname, flags);
128 if (!asect)
129 return NULL;
131 asect->size = size;
132 asect->vma = vma;
133 asect->filepos = bfd_tell (abfd);
134 asect->alignment_power = alignment_power;
136 return asect;
139 /* Return true if the given core file section corresponds to a thread,
140 based on its name. */
142 static int
143 thread_section_p (bfd *abfd ATTRIBUTE_UNUSED,
144 asection *sect,
145 void *obj ATTRIBUTE_UNUSED)
147 return CONST_STRNEQ (sect->name, ".reg/");
150 /* this function builds a bfd target if the file is a corefile.
151 It returns null or 0 if it finds out thaat it is not a core file.
152 The way it checks this is by looking for allowed 'type' field values.
153 These are declared in sys/core.h
154 There are some values which are 'reserved for future use'. In particular
155 CORE_NONE is actually defined as 0. This may be a catch-all for cases
156 in which the core file is generated by some non-hpux application.
157 (I am just guessing here!)
159 static const bfd_target *
160 hpux_core_core_file_p (bfd *abfd)
162 int good_sections = 0;
163 int unknown_sections = 0;
165 core_hdr (abfd) = (struct hpux_core_struct *)
166 bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hpux_core_struct));
167 if (!core_hdr (abfd))
168 return NULL;
170 while (1)
172 int val;
173 struct corehead core_header;
175 val = bfd_bread ((void *) &core_header,
176 (bfd_size_type) sizeof core_header, abfd);
177 if (val <= 0)
178 break;
179 switch (core_header.type)
181 case CORE_KERNEL:
182 case CORE_FORMAT:
183 /* Just skip this. */
184 bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
185 good_sections++;
186 break;
187 case CORE_EXEC:
189 struct proc_exec proc_exec;
190 if (bfd_bread ((void *) &proc_exec, (bfd_size_type) core_header.len,
191 abfd) != core_header.len)
192 break;
193 strncpy (core_command (abfd), proc_exec.cmd, MAXCOMLEN + 1);
194 good_sections++;
196 break;
197 case CORE_PROC:
199 struct proc_info proc_info;
200 char secname[100]; /* Of arbitrary size, but plenty large. */
202 /* We need to read this section, 'cause we need to determine
203 whether the core-dumped app was threaded before we create
204 any .reg sections. */
205 if (bfd_bread (&proc_info, (bfd_size_type) core_header.len, abfd)
206 != core_header.len)
207 break;
209 /* However, we also want to create those sections with the
210 file positioned at the start of the record, it seems. */
211 if (bfd_seek (abfd, -((file_ptr) core_header.len), SEEK_CUR) != 0)
212 break;
214 #if defined(PROC_INFO_HAS_THREAD_ID)
215 core_kernel_thread_id (abfd) = proc_info.lwpid;
216 core_user_thread_id (abfd) = proc_info.user_tid;
217 #else
218 core_kernel_thread_id (abfd) = 0;
219 core_user_thread_id (abfd) = 0;
220 #endif
221 /* If the program was unthreaded, then we'll just create a
222 .reg section.
224 If the program was threaded, then we'll create .reg/XXXXX
225 section for each thread, where XXXXX is a printable
226 representation of the kernel thread id. We'll also
227 create a .reg section for the thread that was running
228 and signalled at the time of the core-dump (i.e., this
229 is effectively an alias, needed to keep GDB happy.)
231 Note that we use `.reg/XXXXX' as opposed to '.regXXXXX'
232 because GDB expects that .reg2 will be the floating-
233 point registers. */
234 if (core_kernel_thread_id (abfd) == 0)
236 if (!make_bfd_asection (abfd, ".reg",
237 SEC_HAS_CONTENTS,
238 core_header.len,
239 (bfd_vma) offsetof (struct proc_info,
240 hw_regs),
242 goto fail;
244 else
246 /* There are threads. Is this the one that caused the
247 core-dump? We'll claim it was the running thread. */
248 if (proc_info.sig != -1)
250 if (!make_bfd_asection (abfd, ".reg",
251 SEC_HAS_CONTENTS,
252 core_header.len,
253 (bfd_vma)offsetof (struct proc_info,
254 hw_regs),
256 goto fail;
258 /* We always make one of these sections, for every thread. */
259 sprintf (secname, ".reg/%d", core_kernel_thread_id (abfd));
260 if (!make_bfd_asection (abfd, secname,
261 SEC_HAS_CONTENTS,
262 core_header.len,
263 (bfd_vma) offsetof (struct proc_info,
264 hw_regs),
266 goto fail;
268 core_signal (abfd) = proc_info.sig;
269 if (bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR) != 0)
270 break;
271 good_sections++;
273 break;
275 case CORE_DATA:
276 case CORE_STACK:
277 case CORE_TEXT:
278 case CORE_MMF:
279 case CORE_SHM:
280 case CORE_ANON_SHMEM:
281 if (!make_bfd_asection (abfd, ".data",
282 SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
283 core_header.len,
284 (bfd_vma) core_header.addr, 2))
285 goto fail;
287 bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
288 good_sections++;
289 break;
291 case CORE_NONE:
292 /* Let's not punt if we encounter a section of unknown
293 type. Rather, let's make a note of it. If we later
294 see that there were also "good" sections, then we'll
295 declare that this a core file, but we'll also warn that
296 it may be incompatible with this gdb.
298 unknown_sections++;
299 break;
301 default:
302 goto fail; /*unrecognized core file type */
306 /* OK, we believe you. You're a core file (sure, sure). */
308 /* On HP/UX, we sometimes encounter core files where none of the threads
309 was found to be the running thread (ie the signal was set to -1 for
310 all threads). This happens when the program was aborted externally
311 via a TT_CORE ttrace system call. In that case, we just pick one
312 thread at random to be the active thread. */
313 if (core_kernel_thread_id (abfd) != 0
314 && bfd_get_section_by_name (abfd, ".reg") == NULL)
316 asection *asect = bfd_sections_find_if (abfd, thread_section_p, NULL);
317 asection *reg_sect;
319 if (asect != NULL)
321 reg_sect = make_bfd_asection (abfd, ".reg", asect->flags,
322 asect->size, asect->vma,
323 asect->alignment_power);
324 if (reg_sect == NULL)
325 goto fail;
327 reg_sect->filepos = asect->filepos;
331 /* Were there sections of unknown type? If so, yet there were
332 at least some complete sections of known type, then, issue
333 a warning. Possibly the core file was generated on a version
334 of HP-UX that is incompatible with that for which this gdb was
335 built.
337 if ((unknown_sections > 0) && (good_sections > 0))
338 (*_bfd_error_handler)
339 ("%s appears to be a core file,\nbut contains unknown sections. It may have been created on an incompatible\nversion of HP-UX. As a result, some information may be unavailable.\n",
340 abfd->filename);
342 return abfd->xvec;
344 fail:
345 bfd_release (abfd, core_hdr (abfd));
346 core_hdr (abfd) = NULL;
347 bfd_section_list_clear (abfd);
348 return NULL;
351 static char *
352 hpux_core_core_file_failing_command (bfd *abfd)
354 return core_command (abfd);
357 static int
358 hpux_core_core_file_failing_signal (bfd *abfd)
360 return core_signal (abfd);
364 /* If somebody calls any byte-swapping routines, shoot them. */
365 static void
366 swap_abort (void)
368 abort(); /* This way doesn't require any declaration for ANSI to fuck up */
371 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
372 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
373 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
374 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
375 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
376 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
378 const bfd_target hpux_core_vec =
380 "hpux-core",
381 bfd_target_unknown_flavour,
382 BFD_ENDIAN_BIG, /* target byte order */
383 BFD_ENDIAN_BIG, /* target headers byte order */
384 (HAS_RELOC | EXEC_P | /* object flags */
385 HAS_LINENO | HAS_DEBUG |
386 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
387 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
388 0, /* symbol prefix */
389 ' ', /* ar_pad_char */
390 16, /* ar_max_namelen */
391 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
392 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
393 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
394 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
395 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
396 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
398 { /* bfd_check_format */
399 _bfd_dummy_target, /* unknown format */
400 _bfd_dummy_target, /* object file */
401 _bfd_dummy_target, /* archive */
402 hpux_core_core_file_p /* a core file */
404 { /* bfd_set_format */
405 bfd_false, bfd_false,
406 bfd_false, bfd_false
408 { /* bfd_write_contents */
409 bfd_false, bfd_false,
410 bfd_false, bfd_false
413 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
414 BFD_JUMP_TABLE_COPY (_bfd_generic),
415 BFD_JUMP_TABLE_CORE (hpux_core),
416 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
417 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
418 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
419 BFD_JUMP_TABLE_WRITE (_bfd_generic),
420 BFD_JUMP_TABLE_LINK (_bfd_nolink),
421 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
423 NULL,
425 (PTR) 0 /* backend_data */