1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* XPLC - Cross-Platform Lightweight Components
* Copyright (C) 2002, Net Integration Technologies, Inc.
* Copyright (C) 2002-2004, Pierre Phaneuf
* Copyright (C) 2002-2004, Stphane Lajoie
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include <stdlib.h>
#include <stdio.h>
#include "config.h"
#include "loader.h"
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#endif
#ifdef HAVE_MACH_O_DYLD_H
#include <mach-o/dyld.h>
#endif
#if defined(WITH_DLOPEN) && defined(ENABLE_LOADER)
const char* loaderOpen(const char* aFilename,
void** aHandle) {
const char* rv = 0;
/* clear out dl error */
static_cast<void>(dlerror());
*aHandle = dlopen(aFilename, RTLD_NOW);
if(!*aHandle)
rv = dlerror();
return rv;
}
const char* loaderSymbol(void* aHandle,
const char* aSymbol,
void** aPointer) {
/* clear out dl error */
static_cast<void>(dlerror());
*aPointer = dlsym(aHandle, aSymbol);
return dlerror();
}
bool loaderClose(void*& aHandle) {
bool rv;
rv = dlclose(aHandle) == 0;
aHandle = 0;
return rv;
}
#elif defined(WITH_DYLD) && defined(ENABLE_LOADER)
const char* loaderOpen(const char* aFilename,
void** aHandle) {
NSObjectFileImage ofi = 0;
NSObjectFileImageReturnCode ofirc;
ofirc = NSCreateObjectFileImageFromFile(aFilename, &ofi);
switch(ofirc) {
case NSObjectFileImageSuccess:
*aHandle = NSLinkModule(ofi, aFilename,
NSLINKMODULE_OPTION_RETURN_ON_ERROR
| NSLINKMODULE_OPTION_PRIVATE
| NSLINKMODULE_OPTION_BINDNOW);
NSDestroyObjectFileImage(ofi);
break;
case NSObjectFileImageInappropriateFile:
*aHandle =
const_cast<void*>(reinterpret_cast<const void*>(NSAddImage(aFilename, NSADDIMAGE_OPTION_RETURN_ON_ERROR)));
break;
default:
return "could not open dynamic library";
break;
}
return 0;
}
const char* loaderSymbol(void* aHandle,
const char* aSymbol,
void** aPointer) {
int len = strlen(aSymbol);
char* sym = static_cast<char*>(malloc(len + 2));
NSSymbol* nssym = 0;
snprintf(sym, len + 2, "_%s", aSymbol);
/* Check for both possible magic numbers depending on x86/ppc byte order */
if ((((struct mach_header *)aHandle)->magic == MH_MAGIC) ||
(((struct mach_header *)aHandle)->magic == MH_CIGAM)) {
if (NSIsSymbolNameDefinedInImage((struct mach_header *)aHandle, sym)) {
nssym = (NSModule *)NSLookupSymbolInImage((struct mach_header *)aHandle,
sym,
NSLOOKUPSYMBOLINIMAGE_OPTION_BIND
| NSLOOKUPSYMBOLINIMAGE_OPTION_RETURN_ON_ERROR);
}
} else {
nssym = (NSModule *)NSLookupSymbolInModule(aHandle, sym);
}
free(sym);
if(!nssym) {
*aPointer = 0;
return "symbol not found";
}
return 0;
}
bool loaderClose(void*& aHandle) {
aHandle = 0;
return false;
}
#elif defined(WIN32)
#include <windows.h>
const char* getErrorMessage() {
static char error[1024];
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, 0, GetLastError(), 0, error, sizeof(error), 0);
return error;
}
const char* loaderOpen(const char* aFilename,
void** aHandle) {
const char* rv = 0;
UINT oldErrorMode = SetErrorMode(0);
SetErrorMode(oldErrorMode | SEM_FAILCRITICALERRORS);
*aHandle = LoadLibrary(aFilename);
SetErrorMode(oldErrorMode);
if(!*aHandle)
rv = getErrorMessage();
return rv;
}
const char* loaderSymbol(void* aHandle,
const char* aSymbol,
void** aPointer) {
const char* rv = 0;
*aPointer = (void *)GetProcAddress(static_cast<HMODULE>(aHandle), aSymbol);
if(!aPointer)
rv = getErrorMessage();
return rv;
}
bool loaderClose(void*& aHandle) {
bool rv;
rv = FreeLibrary(static_cast<HMODULE>(aHandle)) != 0;
aHandle = 0;
return rv;
}
#else
const char* loaderOpen(const char* aFilename,
void** aHandle) {
*aHandle = 0;
return "dynamic loading not supported on this platform";
}
const char* loaderSymbol(void* aHandle,
const char* aSymbol,
void** aPointer) {
*aPointer = 0;
return "dynamic loading not supported on this platform";
}
bool loaderClose(void*& aHandle) {
aHandle = 0;
return false;
}
#endif
|
