1 /* BFD back-end for HP/UX core files.
2 Copyright 1993, 1994, 1996, 1998, 1999, 2001, 2002, 2003, 2004
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
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? */
37 #include <sys/utsname.h>
39 #endif /* HOST_HPPAHPUX */
43 /* Not a very swift place to put it, but that's where the BSD port
45 #include "/hpux/usr/include/sys/core.h"
47 #endif /* HOST_HPPABSD */
49 #include <sys/param.h>
53 # ifdef HAVE_SYS_NDIR_H
54 # include <sys/ndir.h>
56 # ifdef HAVE_SYS_DIR_H
65 #include <machine/reg.h>
67 #include <sys/user.h> /* After a.out.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)
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
82 #if !defined(CORE_ANON_SHMEM)
83 #define CORE_ANON_SHMEM 0x00000200 /* anonymous shared memory */
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
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)
105 static asection *make_bfd_asection
106 PARAMS ((bfd *, const char *, flagword, bfd_size_type, bfd_vma,
108 static const bfd_target *hpux_core_core_file_p
110 static char *hpux_core_core_file_failing_command
112 static int hpux_core_core_file_failing_signal
114 static bfd_boolean hpux_core_core_file_matches_executable_p
115 PARAMS ((bfd *, bfd *));
116 static void swap_abort
120 make_bfd_asection (abfd, name, flags, size, vma, alignment_power)
126 unsigned int alignment_power;
131 newname = bfd_alloc (abfd, (bfd_size_type) strlen (name) + 1);
135 strcpy (newname, name);
137 asect = bfd_make_section_anyway (abfd, newname);
141 asect->flags = flags;
144 asect->filepos = bfd_tell (abfd);
145 asect->alignment_power = alignment_power;
150 /* Return true if the given core file section corresponds to a thread,
151 based on its name. */
154 thread_section_p (bfd *abfd ATTRIBUTE_UNUSED,
156 void *obj ATTRIBUTE_UNUSED)
158 return (strncmp (bfd_section_name (abfd, sect), ".reg/", 5) == 0);
161 /* this function builds a bfd target if the file is a corefile.
162 It returns null or 0 if it finds out thaat it is not a core file.
163 The way it checks this is by looking for allowed 'type' field values.
164 These are declared in sys/core.h
165 There are some values which are 'reserved for future use'. In particular
166 CORE_NONE is actually defined as 0. This may be a catch-all for cases
167 in which the core file is generated by some non-hpux application.
168 (I am just guessing here!)
170 static const bfd_target *
171 hpux_core_core_file_p (abfd)
174 int good_sections = 0;
175 int unknown_sections = 0;
177 core_hdr (abfd) = (struct hpux_core_struct *)
178 bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hpux_core_struct));
179 if (!core_hdr (abfd))
185 struct corehead core_header;
187 val = bfd_bread ((void *) &core_header,
188 (bfd_size_type) sizeof core_header, abfd);
191 switch (core_header.type)
195 /* Just skip this. */
196 bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
201 struct proc_exec proc_exec;
202 if (bfd_bread ((void *) &proc_exec, (bfd_size_type) core_header.len,
203 abfd) != core_header.len)
205 strncpy (core_command (abfd), proc_exec.cmd, MAXCOMLEN + 1);
211 struct proc_info proc_info;
212 char secname[100]; /* Of arbitrary size, but plenty large. */
214 /* We need to read this section, 'cause we need to determine
215 whether the core-dumped app was threaded before we create
216 any .reg sections. */
217 if (bfd_bread (&proc_info, (bfd_size_type) core_header.len, abfd)
221 /* However, we also want to create those sections with the
222 file positioned at the start of the record, it seems. */
223 if (bfd_seek (abfd, -((file_ptr) core_header.len), SEEK_CUR) != 0)
226 #if defined(PROC_INFO_HAS_THREAD_ID)
227 core_kernel_thread_id (abfd) = proc_info.lwpid;
228 core_user_thread_id (abfd) = proc_info.user_tid;
230 core_kernel_thread_id (abfd) = 0;
231 core_user_thread_id (abfd) = 0;
233 /* If the program was unthreaded, then we'll just create a
236 If the program was threaded, then we'll create .reg/XXXXX
237 section for each thread, where XXXXX is a printable
238 representation of the kernel thread id. We'll also
239 create a .reg section for the thread that was running
240 and signalled at the time of the core-dump (i.e., this
241 is effectively an alias, needed to keep GDB happy.)
243 Note that we use `.reg/XXXXX' as opposed to '.regXXXXX'
244 because GDB expects that .reg2 will be the floating-
246 if (core_kernel_thread_id (abfd) == 0)
248 if (!make_bfd_asection (abfd, ".reg",
251 (bfd_vma) offsetof (struct proc_info,
258 /* There are threads. Is this the one that caused the
259 core-dump? We'll claim it was the running thread. */
260 if (proc_info.sig != -1)
262 if (!make_bfd_asection (abfd, ".reg",
265 (bfd_vma)offsetof (struct proc_info,
270 /* We always make one of these sections, for every thread. */
271 sprintf (secname, ".reg/%d", core_kernel_thread_id (abfd));
272 if (!make_bfd_asection (abfd, secname,
275 (bfd_vma) offsetof (struct proc_info,
280 core_signal (abfd) = proc_info.sig;
281 if (bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR) != 0)
292 case CORE_ANON_SHMEM:
293 if (!make_bfd_asection (abfd, ".data",
294 SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
296 (bfd_vma) core_header.addr, 2))
299 bfd_seek (abfd, (file_ptr) core_header.len, SEEK_CUR);
304 /* Let's not punt if we encounter a section of unknown
305 type. Rather, let's make a note of it. If we later
306 see that there were also "good" sections, then we'll
307 declare that this a core file, but we'll also warn that
308 it may be incompatible with this gdb.
314 goto fail; /*unrecognized core file type */
318 /* OK, we believe you. You're a core file (sure, sure). */
320 /* On HP/UX, we sometimes encounter core files where none of the threads
321 was found to be the running thread (ie the signal was set to -1 for
322 all threads). This happens when the program was aborted externally
323 via a TT_CORE ttrace system call. In that case, we just pick one
324 thread at random to be the active thread. */
325 if (core_kernel_thread_id (abfd) != 0
326 && bfd_get_section_by_name (abfd, ".reg") == NULL)
328 asection *asect = bfd_sections_find_if (abfd, thread_section_p, NULL);
333 reg_sect = make_bfd_asection (abfd, ".reg", asect->flags,
334 asect->size, asect->vma,
335 asect->alignment_power);
336 if (reg_sect == NULL)
339 reg_sect->filepos = asect->filepos;
343 /* Were there sections of unknown type? If so, yet there were
344 at least some complete sections of known type, then, issue
345 a warning. Possibly the core file was generated on a version
346 of HP-UX that is incompatible with that for which this gdb was
349 if ((unknown_sections > 0) && (good_sections > 0))
350 (*_bfd_error_handler)
351 ("%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",
357 bfd_release (abfd, core_hdr (abfd));
358 core_hdr (abfd) = NULL;
359 bfd_section_list_clear (abfd);
364 hpux_core_core_file_failing_command (abfd)
367 return core_command (abfd);
371 hpux_core_core_file_failing_signal (abfd)
374 return core_signal (abfd);
378 hpux_core_core_file_matches_executable_p (core_bfd, exec_bfd)
379 bfd *core_bfd ATTRIBUTE_UNUSED;
380 bfd *exec_bfd ATTRIBUTE_UNUSED;
382 return TRUE; /* FIXME, We have no way of telling at this point */
385 /* If somebody calls any byte-swapping routines, shoot them. */
389 abort(); /* This way doesn't require any declaration for ANSI to fuck up */
392 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
393 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
394 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
395 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
396 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
397 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
399 const bfd_target hpux_core_vec =
402 bfd_target_unknown_flavour,
403 BFD_ENDIAN_BIG, /* target byte order */
404 BFD_ENDIAN_BIG, /* target headers byte order */
405 (HAS_RELOC | EXEC_P | /* object flags */
406 HAS_LINENO | HAS_DEBUG |
407 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
408 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
409 0, /* symbol prefix */
410 ' ', /* ar_pad_char */
411 16, /* ar_max_namelen */
412 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
413 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
414 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
415 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
416 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
417 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
419 { /* bfd_check_format */
420 _bfd_dummy_target, /* unknown format */
421 _bfd_dummy_target, /* object file */
422 _bfd_dummy_target, /* archive */
423 hpux_core_core_file_p /* a core file */
425 { /* bfd_set_format */
426 bfd_false, bfd_false,
429 { /* bfd_write_contents */
430 bfd_false, bfd_false,
434 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
435 BFD_JUMP_TABLE_COPY (_bfd_generic),
436 BFD_JUMP_TABLE_CORE (hpux_core),
437 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
438 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
439 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
440 BFD_JUMP_TABLE_WRITE (_bfd_generic),
441 BFD_JUMP_TABLE_LINK (_bfd_nolink),
442 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
446 (PTR) 0 /* backend_data */