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[deliverable/binutils-gdb.git] / bfd / ptrace-core.c
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252b5132 1/* BFD backend for core files which use the ptrace_user structure
3db64b00 2 Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2001, 2002, 2003, 2004,
aa820537 3 2005, 2006, 2007 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
cd123cb7
NC
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 3 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., 51 Franklin Street - Fifth Floor, Boston,
24 MA 02110-1301, USA. */
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25
26#ifdef PTRACE_CORE
27
252b5132 28#include "sysdep.h"
3db64b00 29#include "bfd.h"
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30#include "libbfd.h"
31
32#include <sys/param.h>
33#include <sys/dir.h>
34#include <signal.h>
35#include <sys/ptrace.h>
36
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37struct trad_core_struct
38 {
39 asection *data_section;
40 asection *stack_section;
41 asection *reg_section;
42 struct ptrace_user u;
43 };
44
45#define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
46#define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
47#define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
48#define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)
49
50/* forward declarations */
51
52const bfd_target *ptrace_unix_core_file_p PARAMS ((bfd *abfd));
b34976b6
AM
53char * ptrace_unix_core_file_failing_command PARAMS ((bfd *abfd));
54int ptrace_unix_core_file_failing_signal PARAMS ((bfd *abfd));
69d246d9 55#define ptrace_unix_core_file_matches_executable_p generic_core_file_matches_executable_p
b34976b6 56static void swap_abort PARAMS ((void));
252b5132 57
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58const bfd_target *
59ptrace_unix_core_file_p (abfd)
60 bfd *abfd;
61
62{
63 int val;
64 struct ptrace_user u;
65 struct trad_core_struct *rawptr;
dc810e39 66 bfd_size_type amt;
117ed4f8 67 flagword flags;
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
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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);
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84
85 if (rawptr == NULL)
86 return 0;
892339ee 87
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88 abfd->tdata.trad_core_data = rawptr;
89
90 rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */
91
9e7b37b3 92 /* Create the sections. */
252b5132 93
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AM
94 flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
95 core_stacksec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".stack",
96 flags);
252b5132 97 if (core_stacksec (abfd) == NULL)
9e7b37b3 98 goto fail;
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AM
99 core_datasec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".data",
100 flags);
252b5132 101 if (core_datasec (abfd) == NULL)
9e7b37b3 102 goto fail;
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AM
103 core_regsec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".reg",
104 SEC_HAS_CONTENTS);
252b5132 105 if (core_regsec (abfd) == NULL)
9e7b37b3 106 goto fail;
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107
108 /* FIXME: Need to worry about shared memory, library data, and library
109 text. I don't think that any of these things are supported on the
892339ee 110 system on which I am developing this for though. */
252b5132 111
eea6121a
AM
112 core_datasec (abfd)->size = u.pt_dsize;
113 core_stacksec (abfd)->size = u.pt_ssize;
114 core_regsec (abfd)->size = sizeof (u);
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115
116 core_datasec (abfd)->vma = u.pt_o_data_start;
117 core_stacksec (abfd)->vma = USRSTACK - u.pt_ssize;
892339ee 118 core_regsec (abfd)->vma = 0 - sizeof (u); /* see trad-core.c */
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119
120 core_datasec (abfd)->filepos = (int) u.pt_dataptr;
121 core_stacksec (abfd)->filepos = (int) (u.pt_dataptr + u.pt_dsize);
122 core_regsec (abfd)->filepos = 0; /* Register segment is ptrace_user */
123
124 /* Align to word at least */
125 core_stacksec (abfd)->alignment_power = 2;
126 core_datasec (abfd)->alignment_power = 2;
127 core_regsec (abfd)->alignment_power = 2;
128
252b5132 129 return abfd->xvec;
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130
131 fail:
132 bfd_release (abfd, abfd->tdata.any);
133 abfd->tdata.any = NULL;
134 bfd_section_list_clear (abfd);
135 return NULL;
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136}
137
138char *
139ptrace_unix_core_file_failing_command (abfd)
140 bfd *abfd;
141{
142 char *com = abfd->tdata.trad_core_data->u.pt_comm;
143 if (*com)
144 return com;
145 else
146 return 0;
147}
148
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149int
150ptrace_unix_core_file_failing_signal (abfd)
151 bfd *abfd;
152{
153 return abfd->tdata.trad_core_data->u.pt_sigframe.sig_num;
154}
252b5132
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155\f
156/* If somebody calls any byte-swapping routines, shoot them. */
157static void
892339ee 158swap_abort ()
252b5132 159{
892339ee 160 abort (); /* This way doesn't require any declaration for ANSI to fuck up */
252b5132 161}
8ce8c090 162
edeb6e24
AM
163#define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
164#define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
165#define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
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166#define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
167#define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
168#define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
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169
170const bfd_target ptrace_core_vec =
171 {
172 "trad-core",
173 bfd_target_unknown_flavour,
174 BFD_ENDIAN_UNKNOWN, /* target byte order */
175 BFD_ENDIAN_UNKNOWN, /* target headers byte order */
176 (HAS_RELOC | EXEC_P | /* object flags */
177 HAS_LINENO | HAS_DEBUG |
178 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
179 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
180 0, /* symbol prefix */
181 ' ', /* ar_pad_char */
182 16, /* ar_max_namelen */
8ce8c090 183 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */
edeb6e24
AM
184 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */
185 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */
8ce8c090 186 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */
edeb6e24
AM
187 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */
188 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */
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189
190 { /* bfd_check_format */
8ce8c090
AM
191 _bfd_dummy_target, /* unknown format */
192 _bfd_dummy_target, /* object file */
193 _bfd_dummy_target, /* archive */
194 ptrace_unix_core_file_p /* a core file */
252b5132
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195 },
196 { /* bfd_set_format */
8ce8c090
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197 bfd_false, bfd_false,
198 bfd_false, bfd_false
252b5132
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199 },
200 { /* bfd_write_contents */
8ce8c090
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201 bfd_false, bfd_false,
202 bfd_false, bfd_false
252b5132 203 },
892339ee 204
8ce8c090
AM
205 BFD_JUMP_TABLE_GENERIC (_bfd_generic),
206 BFD_JUMP_TABLE_COPY (_bfd_generic),
207 BFD_JUMP_TABLE_CORE (ptrace_unix),
208 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
209 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
210 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
211 BFD_JUMP_TABLE_WRITE (_bfd_generic),
212 BFD_JUMP_TABLE_LINK (_bfd_nolink),
213 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
252b5132 214
c3c89269 215 NULL,
892339ee 216
252b5132 217 (PTR) 0 /* backend_data */
8ce8c090 218 };
252b5132
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219
220#endif /* PTRACE_CORE */
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