aboutsummaryrefslogtreecommitdiffhomepage
path: root/loader/elfdll.c
blob: c393c4e29444c0b0516ad583801902fdd7dd1982 (plain)
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
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
/*
 * Elf-dll loader functions
 *
 * Copyright 1999 Bertho A. Stultiens
 */
#include "config.h"

#ifdef HAVE_LIBDL

#include "wine/windef.h"
#include "wine/module.h"
#include "wine/heap.h"
#include "wine/elfdll.h"
#include "wine/debugtools.h"
#include "wine/winerror.h"

//DEFAULT_DEBUG_CHANNEL(elfdll)

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <dlfcn.h>


//WINE_MODREF *local_wm=NULL;
extern modref_list* local_wm;


/*------------------ HACKS -----------------*/
extern DWORD fixup_imports(WINE_MODREF *wm);
extern void dump_exports(HMODULE hModule);
/*---------------- END HACKS ---------------*/

//char *extra_ld_library_path = "/usr/lib/win32";
extern char* def_path;

struct elfdll_image
{
	HMODULE		pe_module_start;
	DWORD		pe_module_size;
};


/****************************************************************************
 *	ELFDLL_dlopen
 *
 * Wrapper for dlopen to search the EXTRA_LD_LIBRARY_PATH from wine.conf
 * manually because libdl.so caches the environment and does not accept our
 * changes.
 */
void *ELFDLL_dlopen(const char *libname, int flags)
{
	char buffer[256];
	int namelen;
	void *handle;
	char *ldpath;

	/* First try the default path search of dlopen() */
	handle = dlopen(libname, flags);
	if(handle)
		return handle;

	/* Now try to construct searches through our extra search-path */
	namelen = strlen(libname);
	ldpath = def_path;
	while(ldpath && *ldpath)
	{
		int len;
		char *cptr;
		char *from;

		from = ldpath;
		cptr = strchr(ldpath, ':');
		if(!cptr)
		{
			len = strlen(ldpath);
			ldpath = NULL;
		}
		else
		{
			len = cptr - ldpath;
			ldpath = cptr + 1;
		}

		if(len + namelen + 1 >= sizeof(buffer))
		{
			ERR("Buffer overflow! Check EXTRA_LD_LIBRARY_PATH or increase buffer size.\n");
			return NULL;
		}

		strncpy(buffer, from, len);
		if(len)
		{
			buffer[len] = '/';
			strcpy(buffer + len + 1, libname);
		}
		else
			strcpy(buffer + len, libname);

		TRACE("Trying dlopen('%s', %d)\n", buffer, flags);

		handle = dlopen(buffer, flags);
		if(handle)
			return handle;
	}
	return NULL;
}


/****************************************************************************
 *	get_sobasename	(internal)
 *
 */
static LPSTR get_sobasename(LPCSTR path, LPSTR name)
{
	char *cptr;

	/* Strip the path from the library name */
	if((cptr = strrchr(path, '/')))
	{
		char *cp = strrchr(cptr+1, '\\');
		if(cp && cp > cptr)
			cptr = cp;
	}
	else
		cptr = strrchr(path, '\\');

	if(!cptr)
		cptr = (char *)path;	/* No '/' nor '\\' in path */
	else
		cptr++;

	strcpy(name, cptr);
	cptr = strrchr(name, '.');
	if(cptr)
		*cptr = '\0';	/* Strip extension */

	/* Convert to lower case.
	 * This must be done manually because it is not sure that
	 * other modules are accessible.
	 */
	for(cptr = name; *cptr; cptr++)
		*cptr = tolower(*cptr);

	return name;
}


/****************************************************************************
 *	ELFDLL_CreateModref	(internal)
 *
 * INPUT
 *	hModule	- the header from the elf-dll's data-segment
 *	path	- requested path from original call
 *
 * OUTPUT
 *	A WINE_MODREF pointer to the new object
 *
 * BUGS
 *	- Does not handle errors due to dependencies correctly
 *	- path can be wrong
 */
#define RVA(base, va)	(((DWORD)base) + ((DWORD)va))

static WINE_MODREF *ELFDLL_CreateModref(HMODULE hModule, LPCSTR path)
{
//	IMAGE_NT_HEADERS *nt = PE_HEADER(hModule);
	IMAGE_DATA_DIRECTORY *dir;
	IMAGE_IMPORT_DESCRIPTOR *pe_import = NULL;
	WINE_MODREF *wm;
	int len;
	HANDLE procheap = GetProcessHeap();

	wm = (WINE_MODREF *)HeapAlloc(procheap, HEAP_ZERO_MEMORY, sizeof(*wm));
	if(!wm)
		return NULL;

	wm->module = hModule;
	wm->type = MODULE32_ELF;		/* FIXME */

//	dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_EXPORT;
//	if(dir->Size)
//		wm->binfmt.pe.pe_export = (PIMAGE_EXPORT_DIRECTORY)RVA(hModule, dir->VirtualAddress);

//	dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_IMPORT;
//	if(dir->Size)
//		pe_import = wm->binfmt.pe.pe_import = (PIMAGE_IMPORT_DESCRIPTOR)RVA(hModule, dir->VirtualAddress);

//	dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_RESOURCE;
//	if(dir->Size)
//		wm->binfmt.pe.pe_resource = (PIMAGE_RESOURCE_DIRECTORY)RVA(hModule, dir->VirtualAddress);


	wm->filename = (char*) malloc(strlen(path)+1);
	strcpy(wm->filename, path);
	wm->modname = strrchr( wm->filename, '\\' );
	if (!wm->modname) wm->modname = wm->filename;
	else wm->modname++;
/*
	len = GetShortPathNameA( wm->filename, NULL, 0 );
	wm->short_filename = (char *)HeapAlloc( procheap, 0, len+1 );
	GetShortPathNameA( wm->filename, wm->short_filename, len+1 );
	wm->short_modname = strrchr( wm->short_filename, '\\' );
	if (!wm->short_modname) wm->short_modname = wm->short_filename;
	else wm->short_modname++;
*/
	/* Link MODREF into process list */

//	EnterCriticalSection( &PROCESS_Current()->crit_section );
	
	if(local_wm)
        {
    	    local_wm->next = (modref_list*) malloc(sizeof(modref_list));
    	    local_wm->next->prev=local_wm;
    	    local_wm->next->next=NULL;
            local_wm->next->wm=wm;
    	    local_wm=local_wm->next;
	}
	else
        {
	    local_wm = (modref_list*) malloc(sizeof(modref_list));
	    local_wm->next=local_wm->prev=NULL;
    	    local_wm->wm=wm;
	}	

//	LeaveCriticalSection( &PROCESS_Current()->crit_section );
	return wm;
}

/****************************************************************************
 *	ELFDLL_LoadLibraryExA	(internal)
 *
 * Implementation of elf-dll loading for PE modules
 */
WINE_MODREF *ELFDLL_LoadLibraryExA(LPCSTR path, DWORD flags)
{
	LPVOID dlhandle;
	struct elfdll_image *image;
	char name[129];
	char soname[129];
	WINE_MODREF *wm;

	get_sobasename(path, name);
	strcpy(soname, name);
	strcat(soname, ".so");

	/* Try to open the elf-dll */
	dlhandle = ELFDLL_dlopen(soname, RTLD_LAZY);
	if(!dlhandle)
	{
		WARN("Could not load %s (%s)\n", soname, dlerror());
		SetLastError( ERROR_FILE_NOT_FOUND );
		return NULL;
	}

	/* Get the 'dllname_elfdll_image' variable */
/*	strcpy(soname, name);
	strcat(soname, "_elfdll_image");
	image = (struct elfdll_image *)dlsym(dlhandle, soname);
	if(!image) 
	{
		ERR("Could not get elfdll image descriptor %s (%s)\n", soname, dlerror());
		dlclose(dlhandle);
		SetLastError( ERROR_BAD_FORMAT );
		return NULL;
	}

*/
	wm = ELFDLL_CreateModref((int)dlhandle, path);
	if(!wm)
	{
		ERR("Could not create WINE_MODREF for %s\n", path);
		dlclose(dlhandle);
		SetLastError( ERROR_OUTOFMEMORY );
		return NULL;
	}

	return wm;
}


/****************************************************************************
 *	ELFDLL_UnloadLibrary	(internal)
 *
 * Unload an elf-dll completely from memory and deallocate the modref
 */
void ELFDLL_UnloadLibrary(WINE_MODREF *wm)
{
}

#endif /*HAVE_LIBDL*/