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252b5132 | 1 | /* BFD backend for core files which use the ptrace_user structure |
7898deda NC |
2 | Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2001 |
3 | Free Software Foundation, Inc. | |
252b5132 RH |
4 | The structure of this file is based on trad-core.c written by John Gilmore |
5 | of Cygnus Support. | |
6 | Modified to work with the ptrace_user structure by Kevin A. Buettner. | |
7 | (Longterm it may be better to merge this file with trad-core.c) | |
8 | ||
9 | This file is part of BFD, the Binary File Descriptor library. | |
10 | ||
11 | This program is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
15 | ||
16 | This program is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with this program; if not, write to the Free Software | |
23 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
24 | ||
25 | #ifdef PTRACE_CORE | |
26 | ||
27 | #include "bfd.h" | |
28 | #include "sysdep.h" | |
29 | #include "libbfd.h" | |
30 | ||
31 | #include <sys/param.h> | |
32 | #include <sys/dir.h> | |
33 | #include <signal.h> | |
34 | #include <sys/ptrace.h> | |
35 | ||
252b5132 RH |
36 | struct trad_core_struct |
37 | { | |
38 | asection *data_section; | |
39 | asection *stack_section; | |
40 | asection *reg_section; | |
41 | struct ptrace_user u; | |
42 | }; | |
43 | ||
44 | #define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u)) | |
45 | #define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section) | |
46 | #define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section) | |
47 | #define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section) | |
48 | ||
49 | /* forward declarations */ | |
50 | ||
51 | const bfd_target *ptrace_unix_core_file_p PARAMS ((bfd *abfd)); | |
52 | char * ptrace_unix_core_file_failing_command PARAMS ((bfd *abfd)); | |
53 | int ptrace_unix_core_file_failing_signal PARAMS ((bfd *abfd)); | |
54 | boolean ptrace_unix_core_file_matches_executable_p | |
55 | PARAMS ((bfd *core_bfd, bfd *exec_bfd)); | |
56 | static void swap_abort PARAMS ((void)); | |
57 | ||
58 | /* ARGSUSED */ | |
59 | const bfd_target * | |
60 | ptrace_unix_core_file_p (abfd) | |
61 | bfd *abfd; | |
62 | ||
63 | { | |
64 | int val; | |
65 | struct ptrace_user u; | |
66 | struct trad_core_struct *rawptr; | |
dc810e39 | 67 | bfd_size_type amt; |
252b5132 | 68 | |
dc810e39 | 69 | val = bfd_bread ((void *)&u, (bfd_size_type) sizeof u, abfd); |
892339ee | 70 | if (val != sizeof u || u.pt_magic != _BCS_PTRACE_MAGIC |
252b5132 RH |
71 | || u.pt_rev != _BCS_PTRACE_REV) |
72 | { | |
73 | /* Too small to be a core file */ | |
74 | bfd_set_error (bfd_error_wrong_format); | |
75 | return 0; | |
76 | } | |
77 | ||
78 | /* OK, we believe you. You're a core file (sure, sure). */ | |
79 | ||
80 | /* Allocate both the upage and the struct core_data at once, so | |
81 | a single free() will free them both. */ | |
dc810e39 AM |
82 | amt = sizeof (struct trad_core_struct); |
83 | rawptr = (struct trad_core_struct *) bfd_zalloc (abfd, amt); | |
252b5132 RH |
84 | |
85 | if (rawptr == NULL) | |
86 | return 0; | |
892339ee | 87 | |
252b5132 RH |
88 | abfd->tdata.trad_core_data = rawptr; |
89 | ||
90 | rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */ | |
91 | ||
92 | /* Create the sections. This is raunchy, but bfd_close wants to free | |
93 | them separately. */ | |
94 | ||
dc810e39 AM |
95 | amt = sizeof (asection); |
96 | core_stacksec (abfd) = (asection *) bfd_zalloc (abfd, amt); | |
252b5132 RH |
97 | if (core_stacksec (abfd) == NULL) |
98 | return NULL; | |
dc810e39 | 99 | core_datasec (abfd) = (asection *) bfd_zalloc (abfd, amt); |
252b5132 RH |
100 | if (core_datasec (abfd) == NULL) |
101 | return NULL; | |
dc810e39 | 102 | core_regsec (abfd) = (asection *) bfd_zalloc (abfd, amt); |
252b5132 RH |
103 | if (core_regsec (abfd) == NULL) |
104 | return NULL; | |
105 | ||
106 | core_stacksec (abfd)->name = ".stack"; | |
107 | core_datasec (abfd)->name = ".data"; | |
108 | core_regsec (abfd)->name = ".reg"; | |
109 | ||
110 | /* FIXME: Need to worry about shared memory, library data, and library | |
111 | text. I don't think that any of these things are supported on the | |
892339ee | 112 | system on which I am developing this for though. */ |
252b5132 RH |
113 | |
114 | core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; | |
115 | core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; | |
116 | core_regsec (abfd)->flags = SEC_HAS_CONTENTS; | |
117 | ||
118 | core_datasec (abfd)->_raw_size = u.pt_dsize; | |
119 | core_stacksec (abfd)->_raw_size = u.pt_ssize; | |
892339ee | 120 | core_regsec (abfd)->_raw_size = sizeof (u); |
252b5132 RH |
121 | |
122 | core_datasec (abfd)->vma = u.pt_o_data_start; | |
123 | core_stacksec (abfd)->vma = USRSTACK - u.pt_ssize; | |
892339ee | 124 | core_regsec (abfd)->vma = 0 - sizeof (u); /* see trad-core.c */ |
252b5132 RH |
125 | |
126 | core_datasec (abfd)->filepos = (int) u.pt_dataptr; | |
127 | core_stacksec (abfd)->filepos = (int) (u.pt_dataptr + u.pt_dsize); | |
128 | core_regsec (abfd)->filepos = 0; /* Register segment is ptrace_user */ | |
129 | ||
130 | /* Align to word at least */ | |
131 | core_stacksec (abfd)->alignment_power = 2; | |
132 | core_datasec (abfd)->alignment_power = 2; | |
133 | core_regsec (abfd)->alignment_power = 2; | |
134 | ||
135 | abfd->sections = core_stacksec (abfd); | |
136 | core_stacksec (abfd)->next = core_datasec (abfd); | |
137 | core_datasec (abfd)->next = core_regsec (abfd); | |
138 | abfd->section_count = 3; | |
139 | ||
140 | return abfd->xvec; | |
141 | } | |
142 | ||
143 | char * | |
144 | ptrace_unix_core_file_failing_command (abfd) | |
145 | bfd *abfd; | |
146 | { | |
147 | char *com = abfd->tdata.trad_core_data->u.pt_comm; | |
148 | if (*com) | |
149 | return com; | |
150 | else | |
151 | return 0; | |
152 | } | |
153 | ||
154 | /* ARGSUSED */ | |
155 | int | |
156 | ptrace_unix_core_file_failing_signal (abfd) | |
157 | bfd *abfd; | |
158 | { | |
159 | return abfd->tdata.trad_core_data->u.pt_sigframe.sig_num; | |
160 | } | |
161 | ||
162 | /* ARGSUSED */ | |
163 | boolean | |
164 | ptrace_unix_core_file_matches_executable_p (core_bfd, exec_bfd) | |
165 | bfd *core_bfd, *exec_bfd; | |
166 | { | |
892339ee | 167 | /* FIXME: Use pt_timdat field of the ptrace_user structure to match |
252b5132 RH |
168 | the date of the executable */ |
169 | return true; | |
170 | } | |
171 | \f | |
172 | /* If somebody calls any byte-swapping routines, shoot them. */ | |
173 | static void | |
892339ee | 174 | swap_abort () |
252b5132 | 175 | { |
892339ee | 176 | abort (); /* This way doesn't require any declaration for ANSI to fuck up */ |
252b5132 RH |
177 | } |
178 | #define NO_GET ((bfd_vma (*) PARAMS (( const bfd_byte *))) swap_abort ) | |
179 | #define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort ) | |
180 | #define NO_SIGNED_GET \ | |
181 | ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort ) | |
182 | ||
183 | const bfd_target ptrace_core_vec = | |
184 | { | |
185 | "trad-core", | |
186 | bfd_target_unknown_flavour, | |
187 | BFD_ENDIAN_UNKNOWN, /* target byte order */ | |
188 | BFD_ENDIAN_UNKNOWN, /* target headers byte order */ | |
189 | (HAS_RELOC | EXEC_P | /* object flags */ | |
190 | HAS_LINENO | HAS_DEBUG | | |
191 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), | |
192 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ | |
193 | 0, /* symbol prefix */ | |
194 | ' ', /* ar_pad_char */ | |
195 | 16, /* ar_max_namelen */ | |
196 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */ | |
197 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */ | |
198 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */ | |
199 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */ | |
200 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */ | |
201 | NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */ | |
202 | ||
203 | { /* bfd_check_format */ | |
204 | _bfd_dummy_target, /* unknown format */ | |
205 | _bfd_dummy_target, /* object file */ | |
206 | _bfd_dummy_target, /* archive */ | |
207 | ptrace_unix_core_file_p /* a core file */ | |
208 | }, | |
209 | { /* bfd_set_format */ | |
210 | bfd_false, bfd_false, | |
211 | bfd_false, bfd_false | |
212 | }, | |
213 | { /* bfd_write_contents */ | |
214 | bfd_false, bfd_false, | |
215 | bfd_false, bfd_false | |
216 | }, | |
892339ee | 217 | |
252b5132 RH |
218 | BFD_JUMP_TABLE_GENERIC (_bfd_generic), |
219 | BFD_JUMP_TABLE_COPY (_bfd_generic), | |
220 | BFD_JUMP_TABLE_CORE (ptrace_unix), | |
221 | BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), | |
222 | BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), | |
223 | BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), | |
224 | BFD_JUMP_TABLE_WRITE (_bfd_generic), | |
225 | BFD_JUMP_TABLE_LINK (_bfd_nolink), | |
226 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), | |
227 | ||
c3c89269 | 228 | NULL, |
892339ee | 229 | |
252b5132 RH |
230 | (PTR) 0 /* backend_data */ |
231 | }; | |
232 | ||
233 | #endif /* PTRACE_CORE */ |