1 /* dso_win32.c -*- mode:C; c-file-style: "eay" -*- */
2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
3 * project 2000.
4 */
5 /* ====================================================================
6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59 #include <stdio.h>
60 #include <string.h>
61 #include "cryptlib.h"
62 #include <openssl/dso.h>
63
64 #if !defined(DSO_WIN32)
65 DSO_METHOD *DSO_METHOD_win32(void)
66 {
67 return NULL;
68 }
69 #else
70
71 #ifdef _WIN32_WCE
72 # if _WIN32_WCE < 300
73 static FARPROC GetProcAddressA(HMODULE hModule,LPCSTR lpProcName)
74 {
75 WCHAR lpProcNameW[64];
76 int i;
77
78 for (i=0;lpProcName[i] && i<64;i++)
79 lpProcNameW[i] = (WCHAR)lpProcName[i];
80 if (i==64) return NULL;
81 lpProcNameW[i] = 0;
82
83 return GetProcAddressW(hModule,lpProcNameW);
84 }
85 # endif
86 # undef GetProcAddress
87 # define GetProcAddress GetProcAddressA
88
89 static HINSTANCE LoadLibraryA(LPCSTR lpLibFileName)
90 {
91 WCHAR *fnamw;
92 size_t len_0=strlen(lpLibFileName)+1,i;
93
94 #ifdef _MSC_VER
95 fnamw = (WCHAR *)_alloca (len_0*sizeof(WCHAR));
96 #else
97 fnamw = (WCHAR *)alloca (len_0*sizeof(WCHAR));
98 #endif
99 if (fnamw == NULL)
100 {
101 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
102 return NULL;
103 }
104
105 #if defined(_WIN32_WCE) && _WIN32_WCE>=101
106 if (!MultiByteToWideChar(CP_ACP,0,lpLibFileName,len_0,fnamw,len_0))
107 #endif
108 for (i=0;i<len_0;i++) fnamw[i]=(WCHAR)lpLibFileName[i];
109
110 return LoadLibraryW(fnamw);
111 }
112 #endif
113
114 /* Part of the hack in "win32_load" ... */
115 #define DSO_MAX_TRANSLATED_SIZE 256
116
117 static int win32_load(DSO *dso);
118 static int win32_unload(DSO *dso);
119 static void *win32_bind_var(DSO *dso, const char *symname);
120 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname);
121 #if 0
122 static int win32_unbind_var(DSO *dso, char *symname, void *symptr);
123 static int win32_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);
124 static int win32_init(DSO *dso);
125 static int win32_finish(DSO *dso);
126 static long win32_ctrl(DSO *dso, int cmd, long larg, void *parg);
127 #endif
128 static char *win32_name_converter(DSO *dso, const char *filename);
129 static char *win32_merger(DSO *dso, const char *filespec1,
130 const char *filespec2);
131 static int win32_pathbyaddr(void *addr,char *path,int sz);
132 static void *win32_globallookup(const char *name);
133
134 static const char *openssl_strnchr(const char *string, int c, size_t len);
135
136 static DSO_METHOD dso_meth_win32 = {
137 "OpenSSL 'win32' shared library method",
138 win32_load,
139 win32_unload,
140 win32_bind_var,
141 win32_bind_func,
142 /* For now, "unbind" doesn't exist */
143 #if 0
144 NULL, /* unbind_var */
145 NULL, /* unbind_func */
146 #endif
147 NULL, /* ctrl */
148 win32_name_converter,
149 win32_merger,
150 NULL, /* init */
151 NULL, /* finish */
152 win32_pathbyaddr,
153 win32_globallookup
154 };
155
156 DSO_METHOD *DSO_METHOD_win32(void)
157 {
158 return(&dso_meth_win32);
159 }
160
161 /* For this DSO_METHOD, our meth_data STACK will contain;
162 * (i) a pointer to the handle (HINSTANCE) returned from
163 * LoadLibrary(), and copied.
164 */
165
166 static int win32_load(DSO *dso)
167 {
168 HINSTANCE h = NULL, *p = NULL;
169 /* See applicable comments from dso_dl.c */
170 char *filename = DSO_convert_filename(dso, NULL);
171
172 if(filename == NULL)
173 {
174 DSOerr(DSO_F_WIN32_LOAD,DSO_R_NO_FILENAME);
175 goto err;
176 }
177 h = LoadLibraryA(filename);
178 if(h == NULL)
179 {
180 DSOerr(DSO_F_WIN32_LOAD,DSO_R_LOAD_FAILED);
181 ERR_add_error_data(3, "filename(", filename, ")");
182 goto err;
183 }
184 p = (HINSTANCE *)OPENSSL_malloc(sizeof(HINSTANCE));
185 if(p == NULL)
186 {
187 DSOerr(DSO_F_WIN32_LOAD,ERR_R_MALLOC_FAILURE);
188 goto err;
189 }
190 *p = h;
191 if(!sk_void_push(dso->meth_data, p))
192 {
193 DSOerr(DSO_F_WIN32_LOAD,DSO_R_STACK_ERROR);
194 goto err;
195 }
196 /* Success */
197 dso->loaded_filename = filename;
198 return(1);
199 err:
200 /* Cleanup !*/
201 if(filename != NULL)
202 OPENSSL_free(filename);
203 if(p != NULL)
204 OPENSSL_free(p);
205 if(h != NULL)
206 FreeLibrary(h);
207 return(0);
208 }
209
210 static int win32_unload(DSO *dso)
211 {
212 HINSTANCE *p;
213 if(dso == NULL)
214 {
215 DSOerr(DSO_F_WIN32_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
216 return(0);
217 }
218 if(sk_void_num(dso->meth_data) < 1)
219 return(1);
220 p = sk_void_pop(dso->meth_data);
221 if(p == NULL)
222 {
223 DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_NULL_HANDLE);
224 return(0);
225 }
226 if(!FreeLibrary(*p))
227 {
228 DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_UNLOAD_FAILED);
229 /* We should push the value back onto the stack in
230 * case of a retry. */
231 sk_void_push(dso->meth_data, p);
232 return(0);
233 }
234 /* Cleanup */
235 OPENSSL_free(p);
236 return(1);
237 }
238
239 /* Using GetProcAddress for variables? TODO: Check this out in
240 * the Win32 API docs, there's probably a variant for variables. */
241 static void *win32_bind_var(DSO *dso, const char *symname)
242 {
243 HINSTANCE *ptr;
244 void *sym;
245
246 if((dso == NULL) || (symname == NULL))
247 {
248 DSOerr(DSO_F_WIN32_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
249 return(NULL);
250 }
251 if(sk_void_num(dso->meth_data) < 1)
252 {
253 DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_STACK_ERROR);
254 return(NULL);
255 }
256 ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1);
257 if(ptr == NULL)
258 {
259 DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_NULL_HANDLE);
260 return(NULL);
261 }
262 sym = GetProcAddress(*ptr, symname);
263 if(sym == NULL)
264 {
265 DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_SYM_FAILURE);
266 ERR_add_error_data(3, "symname(", symname, ")");
267 return(NULL);
268 }
269 return(sym);
270 }
271
272 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname)
273 {
274 HINSTANCE *ptr;
275 void *sym;
276
277 if((dso == NULL) || (symname == NULL))
278 {
279 DSOerr(DSO_F_WIN32_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
280 return(NULL);
281 }
282 if(sk_void_num(dso->meth_data) < 1)
283 {
284 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_STACK_ERROR);
285 return(NULL);
286 }
287 ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1);
288 if(ptr == NULL)
289 {
290 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_NULL_HANDLE);
291 return(NULL);
292 }
293 sym = GetProcAddress(*ptr, symname);
294 if(sym == NULL)
295 {
296 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_SYM_FAILURE);
297 ERR_add_error_data(3, "symname(", symname, ")");
298 return(NULL);
299 }
300 return((DSO_FUNC_TYPE)sym);
301 }
302
303 struct file_st
304 {
305 const char *node; int nodelen;
306 const char *device; int devicelen;
307 const char *predir; int predirlen;
308 const char *dir; int dirlen;
309 const char *file; int filelen;
310 };
311
312 static struct file_st *win32_splitter(DSO *dso, const char *filename,
313 int assume_last_is_dir)
314 {
315 struct file_st *result = NULL;
316 enum { IN_NODE, IN_DEVICE, IN_FILE } position;
317 const char *start = filename;
318 char last;
319
320 if (!filename)
321 {
322 DSOerr(DSO_F_WIN32_SPLITTER,DSO_R_NO_FILENAME);
323 /*goto err;*/
324 return(NULL);
325 }
326
327 result = OPENSSL_malloc(sizeof(struct file_st));
328 if(result == NULL)
329 {
330 DSOerr(DSO_F_WIN32_SPLITTER,
331 ERR_R_MALLOC_FAILURE);
332 return(NULL);
333 }
334
335 memset(result, 0, sizeof(struct file_st));
336 position = IN_DEVICE;
337
338 if((filename[0] == '\\' && filename[1] == '\\')
339 || (filename[0] == '/' && filename[1] == '/'))
340 {
341 position = IN_NODE;
342 filename += 2;
343 start = filename;
344 result->node = start;
345 }
346
347 do
348 {
349 last = filename[0];
350 switch(last)
351 {
352 case ':':
353 if(position != IN_DEVICE)
354 {
355 DSOerr(DSO_F_WIN32_SPLITTER,
356 DSO_R_INCORRECT_FILE_SYNTAX);
357 /*goto err;*/
358 OPENSSL_free(result);
359 return(NULL);
360 }
361 result->device = start;
362 result->devicelen = (int)(filename - start);
363 position = IN_FILE;
364 start = ++filename;
365 result->dir = start;
366 break;
367 case '\\':
368 case '/':
369 if(position == IN_NODE)
370 {
371 result->nodelen = (int)(filename - start);
372 position = IN_FILE;
373 start = ++filename;
374 result->dir = start;
375 }
376 else if(position == IN_DEVICE)
377 {
378 position = IN_FILE;
379 filename++;
380 result->dir = start;
381 result->dirlen = (int)(filename - start);
382 start = filename;
383 }
384 else
385 {
386 filename++;
387 result->dirlen += (int)(filename - start);
388 start = filename;
389 }
390 break;
391 case '\0':
392 if(position == IN_NODE)
393 {
394 result->nodelen = (int)(filename - start);
395 }
396 else
397 {
398 if(filename - start > 0)
399 {
400 if (assume_last_is_dir)
401 {
402 if (position == IN_DEVICE)
403 {
404 result->dir = start;
405 result->dirlen = 0;
406 }
407 result->dirlen +=
408 (int)(filename - start);
409 }
410 else
411 {
412 result->file = start;
413 result->filelen =
414 (int)(filename - start);
415 }
416 }
417 }
418 break;
419 default:
420 filename++;
421 break;
422 }
423 }
424 while(last);
425
426 if(!result->nodelen) result->node = NULL;
427 if(!result->devicelen) result->device = NULL;
428 if(!result->dirlen) result->dir = NULL;
429 if(!result->filelen) result->file = NULL;
430
431 return(result);
432 }
433
434 static char *win32_joiner(DSO *dso, const struct file_st *file_split)
435 {
436 int len = 0, offset = 0;
437 char *result = NULL;
438 const char *start;
439
440 if(!file_split)
441 {
442 DSOerr(DSO_F_WIN32_JOINER,
443 ERR_R_PASSED_NULL_PARAMETER);
444 return(NULL);
445 }
446 if(file_split->node)
447 {
448 len += 2 + file_split->nodelen; /* 2 for starting \\ */
449 if(file_split->predir || file_split->dir || file_split->file)
450 len++; /* 1 for ending \ */
451 }
452 else if(file_split->device)
453 {
454 len += file_split->devicelen + 1; /* 1 for ending : */
455 }
456 len += file_split->predirlen;
457 if(file_split->predir && (file_split->dir || file_split->file))
458 {
459 len++; /* 1 for ending \ */
460 }
461 len += file_split->dirlen;
462 if(file_split->dir && file_split->file)
463 {
464 len++; /* 1 for ending \ */
465 }
466 len += file_split->filelen;
467
468 if(!len)
469 {
470 DSOerr(DSO_F_WIN32_JOINER, DSO_R_EMPTY_FILE_STRUCTURE);
471 return(NULL);
472 }
473
474 result = OPENSSL_malloc(len + 1);
475 if (!result)
476 {
477 DSOerr(DSO_F_WIN32_JOINER,
478 ERR_R_MALLOC_FAILURE);
479 return(NULL);
480 }
481
482 if(file_split->node)
483 {
484 strcpy(&result[offset], "\\\\"); offset += 2;
485 strncpy(&result[offset], file_split->node,
486 file_split->nodelen); offset += file_split->nodelen;
487 if(file_split->predir || file_split->dir || file_split->file)
488 {
489 result[offset] = '\\'; offset++;
490 }
491 }
492 else if(file_split->device)
493 {
494 strncpy(&result[offset], file_split->device,
495 file_split->devicelen); offset += file_split->devicelen;
496 result[offset] = ':'; offset++;
497 }
498 start = file_split->predir;
499 while(file_split->predirlen > (start - file_split->predir))
500 {
501 const char *end = openssl_strnchr(start, '/',
502 file_split->predirlen - (start - file_split->predir));
503 if(!end)
504 end = start
505 + file_split->predirlen
506 - (start - file_split->predir);
507 strncpy(&result[offset], start,
508 end - start); offset += (int)(end - start);
509 result[offset] = '\\'; offset++;
510 start = end + 1;
511 }
512 #if 0 /* Not needed, since the directory converter above already appeneded
513 a backslash */
514 if(file_split->predir && (file_split->dir || file_split->file))
515 {
516 result[offset] = '\\'; offset++;
517 }
518 #endif
519 start = file_split->dir;
520 while(file_split->dirlen > (start - file_split->dir))
521 {
522 const char *end = openssl_strnchr(start, '/',
523 file_split->dirlen - (start - file_split->dir));
524 if(!end)
525 end = start
526 + file_split->dirlen
527 - (start - file_split->dir);
528 strncpy(&result[offset], start,
529 end - start); offset += (int)(end - start);
530 result[offset] = '\\'; offset++;
531 start = end + 1;
532 }
533 #if 0 /* Not needed, since the directory converter above already appeneded
534 a backslash */
535 if(file_split->dir && file_split->file)
536 {
537 result[offset] = '\\'; offset++;
538 }
539 #endif
540 strncpy(&result[offset], file_split->file,
541 file_split->filelen); offset += file_split->filelen;
542 result[offset] = '\0';
543 return(result);
544 }
545
546 static char *win32_merger(DSO *dso, const char *filespec1, const char *filespec2)
547 {
548 char *merged = NULL;
549 struct file_st *filespec1_split = NULL;
550 struct file_st *filespec2_split = NULL;
551
552 if(!filespec1 && !filespec2)
553 {
554 DSOerr(DSO_F_WIN32_MERGER,
555 ERR_R_PASSED_NULL_PARAMETER);
556 return(NULL);
557 }
558 if (!filespec2)
559 {
560 merged = OPENSSL_malloc(strlen(filespec1) + 1);
561 if(!merged)
562 {
563 DSOerr(DSO_F_WIN32_MERGER,
564 ERR_R_MALLOC_FAILURE);
565 return(NULL);
566 }
567 strcpy(merged, filespec1);
568 }
569 else if (!filespec1)
570 {
571 merged = OPENSSL_malloc(strlen(filespec2) + 1);
572 if(!merged)
573 {
574 DSOerr(DSO_F_WIN32_MERGER,
575 ERR_R_MALLOC_FAILURE);
576 return(NULL);
577 }
578 strcpy(merged, filespec2);
579 }
580 else
581 {
582 filespec1_split = win32_splitter(dso, filespec1, 0);
583 if (!filespec1_split)
584 {
585 DSOerr(DSO_F_WIN32_MERGER,
586 ERR_R_MALLOC_FAILURE);
587 return(NULL);
588 }
589 filespec2_split = win32_splitter(dso, filespec2, 1);
590 if (!filespec2_split)
591 {
592 DSOerr(DSO_F_WIN32_MERGER,
593 ERR_R_MALLOC_FAILURE);
594 OPENSSL_free(filespec1_split);
595 return(NULL);
596 }
597
598 /* Fill in into filespec1_split */
599 if (!filespec1_split->node && !filespec1_split->device)
600 {
601 filespec1_split->node = filespec2_split->node;
602 filespec1_split->nodelen = filespec2_split->nodelen;
603 filespec1_split->device = filespec2_split->device;
604 filespec1_split->devicelen = filespec2_split->devicelen;
605 }
606 if (!filespec1_split->dir)
607 {
608 filespec1_split->dir = filespec2_split->dir;
609 filespec1_split->dirlen = filespec2_split->dirlen;
610 }
611 else if (filespec1_split->dir[0] != '\\'
612 && filespec1_split->dir[0] != '/')
613 {
614 filespec1_split->predir = filespec2_split->dir;
615 filespec1_split->predirlen = filespec2_split->dirlen;
616 }
617 if (!filespec1_split->file)
618 {
619 filespec1_split->file = filespec2_split->file;
620 filespec1_split->filelen = filespec2_split->filelen;
621 }
622
623 merged = win32_joiner(dso, filespec1_split);
624 }
625 OPENSSL_free(filespec1_split);
626 OPENSSL_free(filespec2_split);
627 return(merged);
628 }
629
630 static char *win32_name_converter(DSO *dso, const char *filename)
631 {
632 char *translated;
633 int len, transform;
634
635 len = strlen(filename);
636 transform = ((strstr(filename, "/") == NULL) &&
637 (strstr(filename, "\\") == NULL) &&
638 (strstr(filename, ":") == NULL));
639 if(transform)
640 /* We will convert this to "%s.dll" */
641 translated = OPENSSL_malloc(len + 5);
642 else
643 /* We will simply duplicate filename */
644 translated = OPENSSL_malloc(len + 1);
645 if(translated == NULL)
646 {
647 DSOerr(DSO_F_WIN32_NAME_CONVERTER,
648 DSO_R_NAME_TRANSLATION_FAILED);
649 return(NULL);
650 }
651 if(transform)
652 sprintf(translated, "%s.dll", filename);
653 else
654 sprintf(translated, "%s", filename);
655 return(translated);
656 }
657
658 static const char *openssl_strnchr(const char *string, int c, size_t len)
659 {
660 size_t i;
661 const char *p;
662 for (i = 0, p = string; i < len && *p; i++, p++)
663 {
664 if (*p == c)
665 return p;
666 }
667 return NULL;
668 }
669
670 #include <tlhelp32.h>
671 #ifdef _WIN32_WCE
672 # define DLLNAME "TOOLHELP.DLL"
673 #else
674 # ifdef MODULEENTRY32
675 # undef MODULEENTRY32 /* unmask the ASCII version! */
676 # endif
677 # define DLLNAME "KERNEL32.DLL"
678 #endif
679
680 typedef HANDLE (WINAPI *CREATETOOLHELP32SNAPSHOT)(DWORD, DWORD);
681 typedef BOOL (WINAPI *CLOSETOOLHELP32SNAPSHOT)(HANDLE);
682 typedef BOOL (WINAPI *MODULE32)(HANDLE, MODULEENTRY32 *);
683
684 static int win32_pathbyaddr(void *addr,char *path,int sz)
685 {
686 HMODULE dll;
687 HANDLE hModuleSnap = INVALID_HANDLE_VALUE;
688 MODULEENTRY32 me32;
689 CREATETOOLHELP32SNAPSHOT create_snap;
690 CLOSETOOLHELP32SNAPSHOT close_snap;
691 MODULE32 module_first, module_next;
692 int len;
693
694 if (addr == NULL)
695 {
696 union { int(*f)(void*,char*,int); void *p; } t =
697 { win32_pathbyaddr };
698 addr = t.p;
699 }
700
701 dll = LoadLibrary(TEXT(DLLNAME));
702 if (dll == NULL)
703 {
704 DSOerr(DSO_F_WIN32_PATHBYADDR,DSO_R_UNSUPPORTED);
705 return -1;
706 }
707
708 create_snap = (CREATETOOLHELP32SNAPSHOT)
709 GetProcAddress(dll,"CreateToolhelp32Snapshot");
710 if (create_snap == NULL)
711 {
712 FreeLibrary(dll);
713 DSOerr(DSO_F_WIN32_PATHBYADDR,DSO_R_UNSUPPORTED);
714 return -1;
715 }
716 /* We take the rest for granted... */
717 #ifdef _WIN32_WCE
718 close_snap = (CLOSETOOLHELP32SNAPSHOT)
719 GetProcAddress(dll,"CloseToolhelp32Snapshot");
720 #else
721 close_snap = (CLOSETOOLHELP32SNAPSHOT)CloseHandle;
722 #endif
723 module_first = (MODULE32)GetProcAddress(dll,"Module32First");
724 module_next = (MODULE32)GetProcAddress(dll,"Module32Next");
725
726 hModuleSnap = (*create_snap)(TH32CS_SNAPMODULE,0);
727 if( hModuleSnap == INVALID_HANDLE_VALUE )
728 {
729 FreeLibrary(dll);
730 DSOerr(DSO_F_WIN32_PATHBYADDR,DSO_R_UNSUPPORTED);
731 return -1;
732 }
733
734 me32.dwSize = sizeof(me32);
735
736 if(!(*module_first)(hModuleSnap,&me32))
737 {
738 (*close_snap)(hModuleSnap);
739 FreeLibrary(dll);
740 DSOerr(DSO_F_WIN32_PATHBYADDR,DSO_R_FAILURE);
741 return -1;
742 }
743
744 do {
745 if ((BYTE *)addr >= me32.modBaseAddr &&
746 (BYTE *)addr < me32.modBaseAddr+me32.modBaseSize)
747 {
748 (*close_snap)(hModuleSnap);
749 FreeLibrary(dll);
750 #ifdef _WIN32_WCE
751 # if _WIN32_WCE >= 101
752 return WideCharToMultiByte(CP_ACP,0,me32.szExePath,-1,
753 path,sz,NULL,NULL);
754 # else
755 len = (int)wcslen(me32.szExePath);
756 if (sz <= 0) return len+1;
757 if (len >= sz) len=sz-1;
758 for(i=0;i<len;i++)
759 path[i] = (char)me32.szExePath[i];
760 path[len++] = 0;
761 return len;
762 # endif
763 #else
764 len = (int)strlen(me32.szExePath);
765 if (sz <= 0) return len+1;
766 if (len >= sz) len=sz-1;
767 memcpy(path,me32.szExePath,len);
768 path[len++] = 0;
769 return len;
770 #endif
771 }
772 } while((*module_next)(hModuleSnap, &me32));
773
774 (*close_snap)(hModuleSnap);
775 FreeLibrary(dll);
776 return 0;
777 }
778
779 static void *win32_globallookup(const char *name)
780 {
781 HMODULE dll;
782 HANDLE hModuleSnap = INVALID_HANDLE_VALUE;
783 MODULEENTRY32 me32;
784 CREATETOOLHELP32SNAPSHOT create_snap;
785 CLOSETOOLHELP32SNAPSHOT close_snap;
786 MODULE32 module_first, module_next;
787 FARPROC ret=NULL;
788
789 dll = LoadLibrary(TEXT(DLLNAME));
790 if (dll == NULL)
791 {
792 DSOerr(DSO_F_WIN32_GLOBALLOOKUP,DSO_R_UNSUPPORTED);
793 return NULL;
794 }
795
796 create_snap = (CREATETOOLHELP32SNAPSHOT)
797 GetProcAddress(dll,"CreateToolhelp32Snapshot");
798 if (create_snap == NULL)
799 {
800 FreeLibrary(dll);
801 DSOerr(DSO_F_WIN32_GLOBALLOOKUP,DSO_R_UNSUPPORTED);
802 return NULL;
803 }
804 /* We take the rest for granted... */
805 #ifdef _WIN32_WCE
806 close_snap = (CLOSETOOLHELP32SNAPSHOT)
807 GetProcAddress(dll,"CloseToolhelp32Snapshot");
808 #else
809 close_snap = (CLOSETOOLHELP32SNAPSHOT)CloseHandle;
810 #endif
811 module_first = (MODULE32)GetProcAddress(dll,"Module32First");
812 module_next = (MODULE32)GetProcAddress(dll,"Module32Next");
813
814 hModuleSnap = (*create_snap)(TH32CS_SNAPMODULE,0);
815 if( hModuleSnap == INVALID_HANDLE_VALUE )
816 {
817 FreeLibrary(dll);
818 DSOerr(DSO_F_WIN32_GLOBALLOOKUP,DSO_R_UNSUPPORTED);
819 return NULL;
820 }
821
822 me32.dwSize = sizeof(me32);
823
824 if (!(*module_first)(hModuleSnap,&me32))
825 {
826 (*close_snap)(hModuleSnap);
827 FreeLibrary(dll);
828 return NULL;
829 }
830
831 do {
832 if ((ret = GetProcAddress(me32.hModule,name)))
833 {
834 (*close_snap)(hModuleSnap);
835 FreeLibrary(dll);
836 return ret;
837 }
838 } while((*module_next)(hModuleSnap,&me32));
839
840 (*close_snap)(hModuleSnap);
841 FreeLibrary(dll);
842 return NULL;
843 }
844 #endif /* DSO_WIN32 */