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