bfd/
[binutils.git] / bfd / lynx-core.c
blob5f91b450c5299fd3d959d7f65bd086e40ef4b7d2
1 /* BFD back end for Lynx core files
2 Copyright 1993, 1994, 1995, 2001, 2002, 2004, 2006
3 Free Software Foundation, Inc.
4 Written by Stu Grossman of Cygnus Support.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
22 #include "bfd.h"
23 #include "sysdep.h"
24 #include "libbfd.h"
26 #ifdef LYNX_CORE
28 #include <sys/conf.h>
29 #include <sys/kernel.h>
30 /* sys/kernel.h should define this, but doesn't always, sigh. */
31 #ifndef __LYNXOS
32 #define __LYNXOS
33 #endif
34 #include <sys/mem.h>
35 #include <sys/signal.h>
36 #include <sys/time.h>
37 #include <sys/resource.h>
38 #include <sys/itimer.h>
39 #include <sys/file.h>
40 #include <sys/proc.h>
42 /* These are stored in the bfd's tdata */
44 struct lynx_core_struct
46 int sig;
47 char cmd[PNMLEN + 1];
50 #define core_hdr(bfd) ((bfd)->tdata.lynx_core_data)
51 #define core_signal(bfd) (core_hdr(bfd)->sig)
52 #define core_command(bfd) (core_hdr(bfd)->cmd)
54 #define lynx_core_file_matches_executable_p generic_core_file_matches_executable_p
56 /* Handle Lynx core dump file. */
58 static asection *
59 make_bfd_asection (abfd, name, flags, size, vma, filepos)
60 bfd *abfd;
61 const char *name;
62 flagword flags;
63 bfd_size_type size;
64 bfd_vma vma;
65 file_ptr filepos;
67 asection *asect;
68 char *newname;
70 newname = bfd_alloc (abfd, (bfd_size_type) strlen (name) + 1);
71 if (!newname)
72 return NULL;
74 strcpy (newname, name);
76 asect = bfd_make_section_with_flags (abfd, newname, flags);
77 if (!asect)
78 return NULL;
80 asect->size = size;
81 asect->vma = vma;
82 asect->filepos = filepos;
83 asect->alignment_power = 2;
85 return asect;
88 const bfd_target *
89 lynx_core_file_p (abfd)
90 bfd *abfd;
92 int secnum;
93 struct pssentry pss;
94 bfd_size_type tcontext_size;
95 core_st_t *threadp;
96 int pagesize;
97 asection *newsect;
98 bfd_size_type amt;
100 pagesize = getpagesize (); /* Serious cross-target issue here... This
101 really needs to come from a system-specific
102 header file. */
104 /* Get the pss entry from the core file */
106 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
107 return NULL;
109 amt = sizeof pss;
110 if (bfd_bread ((void *) &pss, amt, abfd) != amt)
112 /* Too small to be a core file */
113 if (bfd_get_error () != bfd_error_system_call)
114 bfd_set_error (bfd_error_wrong_format);
115 return NULL;
118 amt = sizeof (struct lynx_core_struct);
119 core_hdr (abfd) = (struct lynx_core_struct *) bfd_zalloc (abfd, amt);
121 if (!core_hdr (abfd))
122 return NULL;
124 strncpy (core_command (abfd), pss.pname, PNMLEN + 1);
126 /* Compute the size of the thread contexts */
128 tcontext_size = pss.threadcnt * sizeof (core_st_t);
130 /* Allocate space for the thread contexts */
132 threadp = (core_st_t *) bfd_alloc (abfd, tcontext_size);
133 if (!threadp)
134 goto fail;
136 /* Save thread contexts */
138 if (bfd_seek (abfd, (file_ptr) pagesize, SEEK_SET) != 0)
139 goto fail;
141 if (bfd_bread ((void *) threadp, tcontext_size, abfd) != tcontext_size)
143 /* Probably too small to be a core file */
144 if (bfd_get_error () != bfd_error_system_call)
145 bfd_set_error (bfd_error_wrong_format);
146 goto fail;
149 core_signal (abfd) = threadp->currsig;
151 newsect = make_bfd_asection (abfd, ".stack",
152 SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
153 pss.ssize,
154 pss.slimit,
155 pagesize + tcontext_size);
156 if (!newsect)
157 goto fail;
159 newsect = make_bfd_asection (abfd, ".data",
160 SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
161 pss.data_len + pss.bss_len,
162 pss.data_start,
163 pagesize + tcontext_size + pss.ssize
164 #if defined (SPARC) || defined (__SPARC__)
165 /* SPARC Lynx seems to start dumping
166 the .data section at a page
167 boundary. It's OK to check a
168 #define like SPARC here because this
169 file can only be compiled on a Lynx
170 host. */
171 + pss.data_start % pagesize
172 #endif
174 if (!newsect)
175 goto fail;
177 /* And, now for the .reg/XXX pseudo sections. Each thread has it's own
178 .reg/XXX section, where XXX is the thread id (without leading zeros). The
179 currently running thread (at the time of the core dump) also has an alias
180 called `.reg' (just to keep GDB happy). Note that we use `.reg/XXX' as
181 opposed to `.regXXX' because GDB expects that .reg2 will be the floating-
182 point registers. */
184 newsect = make_bfd_asection (abfd, ".reg",
185 SEC_HAS_CONTENTS,
186 sizeof (core_st_t),
188 pagesize);
189 if (!newsect)
190 goto fail;
192 for (secnum = 0; secnum < pss.threadcnt; secnum++)
194 char secname[100];
196 sprintf (secname, ".reg/%d", BUILDPID (0, threadp[secnum].tid));
197 newsect = make_bfd_asection (abfd, secname,
198 SEC_HAS_CONTENTS,
199 sizeof (core_st_t),
201 pagesize + secnum * sizeof (core_st_t));
202 if (!newsect)
203 goto fail;
206 return abfd->xvec;
208 fail:
209 bfd_release (abfd, core_hdr (abfd));
210 core_hdr (abfd) = NULL;
211 bfd_section_list_clear (abfd);
212 return NULL;
215 char *
216 lynx_core_file_failing_command (abfd)
217 bfd *abfd;
219 return core_command (abfd);
223 lynx_core_file_failing_signal (abfd)
224 bfd *abfd;
226 return core_signal (abfd);
229 #endif /* LYNX_CORE */