2009-07-02 Tristan Gingold <gingold@adacore.com>
[binutils.git] / bfd / lynx-core.c
blob46b37d3c833d48c25facb29227b8382a4f841172
1 /* BFD back end for Lynx core files
2 Copyright 1993, 1994, 1995, 2001, 2002, 2004, 2006, 2007
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 3 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,
21 MA 02110-1301, USA. */
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "libbfd.h"
27 #ifdef LYNX_CORE
29 #include <sys/conf.h>
30 #include <sys/kernel.h>
31 /* sys/kernel.h should define this, but doesn't always, sigh. */
32 #ifndef __LYNXOS
33 #define __LYNXOS
34 #endif
35 #include <sys/mem.h>
36 #include <sys/signal.h>
37 #include <sys/time.h>
38 #include <sys/resource.h>
39 #include <sys/itimer.h>
40 #include <sys/file.h>
41 #include <sys/proc.h>
43 /* These are stored in the bfd's tdata */
45 struct lynx_core_struct
47 int sig;
48 char cmd[PNMLEN + 1];
51 #define core_hdr(bfd) ((bfd)->tdata.lynx_core_data)
52 #define core_signal(bfd) (core_hdr(bfd)->sig)
53 #define core_command(bfd) (core_hdr(bfd)->cmd)
55 #define lynx_core_file_matches_executable_p generic_core_file_matches_executable_p
57 /* Handle Lynx core dump file. */
59 static asection *
60 make_bfd_asection (abfd, name, flags, size, vma, filepos)
61 bfd *abfd;
62 const char *name;
63 flagword flags;
64 bfd_size_type size;
65 bfd_vma vma;
66 file_ptr filepos;
68 asection *asect;
69 char *newname;
71 newname = bfd_alloc (abfd, (bfd_size_type) strlen (name) + 1);
72 if (!newname)
73 return NULL;
75 strcpy (newname, name);
77 asect = bfd_make_section_with_flags (abfd, newname, flags);
78 if (!asect)
79 return NULL;
81 asect->size = size;
82 asect->vma = vma;
83 asect->filepos = filepos;
84 asect->alignment_power = 2;
86 return asect;
89 const bfd_target *
90 lynx_core_file_p (abfd)
91 bfd *abfd;
93 int secnum;
94 struct pssentry pss;
95 bfd_size_type tcontext_size;
96 core_st_t *threadp;
97 int pagesize;
98 asection *newsect;
99 bfd_size_type amt;
101 pagesize = getpagesize (); /* Serious cross-target issue here... This
102 really needs to come from a system-specific
103 header file. */
105 /* Get the pss entry from the core file */
107 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
108 return NULL;
110 amt = sizeof pss;
111 if (bfd_bread ((void *) &pss, amt, abfd) != amt)
113 /* Too small to be a core file */
114 if (bfd_get_error () != bfd_error_system_call)
115 bfd_set_error (bfd_error_wrong_format);
116 return NULL;
119 amt = sizeof (struct lynx_core_struct);
120 core_hdr (abfd) = (struct lynx_core_struct *) bfd_zalloc (abfd, amt);
122 if (!core_hdr (abfd))
123 return NULL;
125 strncpy (core_command (abfd), pss.pname, PNMLEN + 1);
127 /* Compute the size of the thread contexts */
129 tcontext_size = pss.threadcnt * sizeof (core_st_t);
131 /* Allocate space for the thread contexts */
133 threadp = (core_st_t *) bfd_alloc (abfd, tcontext_size);
134 if (!threadp)
135 goto fail;
137 /* Save thread contexts */
139 if (bfd_seek (abfd, (file_ptr) pagesize, SEEK_SET) != 0)
140 goto fail;
142 if (bfd_bread ((void *) threadp, tcontext_size, abfd) != tcontext_size)
144 /* Probably too small to be a core file */
145 if (bfd_get_error () != bfd_error_system_call)
146 bfd_set_error (bfd_error_wrong_format);
147 goto fail;
150 core_signal (abfd) = threadp->currsig;
152 newsect = make_bfd_asection (abfd, ".stack",
153 SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
154 pss.ssize,
155 pss.slimit,
156 pagesize + tcontext_size);
157 if (!newsect)
158 goto fail;
160 newsect = make_bfd_asection (abfd, ".data",
161 SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS,
162 pss.data_len + pss.bss_len,
163 pss.data_start,
164 pagesize + tcontext_size + pss.ssize
165 #if defined (SPARC) || defined (__SPARC__)
166 /* SPARC Lynx seems to start dumping
167 the .data section at a page
168 boundary. It's OK to check a
169 #define like SPARC here because this
170 file can only be compiled on a Lynx
171 host. */
172 + pss.data_start % pagesize
173 #endif
175 if (!newsect)
176 goto fail;
178 /* And, now for the .reg/XXX pseudo sections. Each thread has it's own
179 .reg/XXX section, where XXX is the thread id (without leading zeros). The
180 currently running thread (at the time of the core dump) also has an alias
181 called `.reg' (just to keep GDB happy). Note that we use `.reg/XXX' as
182 opposed to `.regXXX' because GDB expects that .reg2 will be the floating-
183 point registers. */
185 newsect = make_bfd_asection (abfd, ".reg",
186 SEC_HAS_CONTENTS,
187 sizeof (core_st_t),
189 pagesize);
190 if (!newsect)
191 goto fail;
193 for (secnum = 0; secnum < pss.threadcnt; secnum++)
195 char secname[100];
197 sprintf (secname, ".reg/%d", BUILDPID (0, threadp[secnum].tid));
198 newsect = make_bfd_asection (abfd, secname,
199 SEC_HAS_CONTENTS,
200 sizeof (core_st_t),
202 pagesize + secnum * sizeof (core_st_t));
203 if (!newsect)
204 goto fail;
207 return abfd->xvec;
209 fail:
210 bfd_release (abfd, core_hdr (abfd));
211 core_hdr (abfd) = NULL;
212 bfd_section_list_clear (abfd);
213 return NULL;
216 char *
217 lynx_core_file_failing_command (abfd)
218 bfd *abfd;
220 return core_command (abfd);
224 lynx_core_file_failing_signal (abfd)
225 bfd *abfd;
227 return core_signal (abfd);
230 #endif /* LYNX_CORE */