Fixed other bugs within MMIO implementation. Now, it's possible to
[wine] / loader / pe_image.c
1 /* 
2  *  Copyright   1994    Eric Youndale & Erik Bos
3  *  Copyright   1995    Martin von Löwis
4  *  Copyright   1996-98 Marcus Meissner
5  *
6  *      based on Eric Youndale's pe-test and:
7  *
8  *      ftp.microsoft.com:/pub/developer/MSDN/CD8/PEFILE.ZIP
9  * make that:
10  *      ftp.microsoft.com:/developr/MSDN/OctCD/PEFILE.ZIP
11  */
12 /* Notes:
13  * Before you start changing something in this file be aware of the following:
14  *
15  * - There are several functions called recursively. In a very subtle and 
16  *   obscure way. DLLs can reference each other recursively etc.
17  * - If you want to enhance, speed up or clean up something in here, think
18  *   twice WHY it is implemented in that strange way. There is usually a reason.
19  *   Though sometimes it might just be lazyness ;)
20  * - In PE_MapImage, right before fixup_imports() all external and internal 
21  *   state MUST be correct since this function can be called with the SAME image
22  *   AGAIN. (Thats recursion for you.) That means MODREF.module and
23  *   NE_MODULE.module32.
24  * - No, you (usually) cannot use Linux mmap() to mmap() the images directly.
25  *
26  *   The problem is, that there is not direct 1:1 mapping from a diskimage and
27  *   a memoryimage. The headers at the start are mapped linear, but the sections
28  *   are not. For x86 the sections are 512 byte aligned in file and 4096 byte
29  *   aligned in memory. Linux likes them 4096 byte aligned in memory (due to
30  *   x86 pagesize, this cannot be fixed without a rather large kernel rewrite)
31  *   and 'blocksize' file-aligned (offsets). Since we have 512/1024/2048 (CDROM)
32  *   and other byte blocksizes, we can't do this. However, this could be less
33  *   difficult to support... (See mm/filemap.c).
34  */
35
36 #include "config.h"
37
38 #include <errno.h>
39 #include <assert.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43 #include <sys/types.h>
44 #include <sys/stat.h>
45 #ifdef HAVE_SYS_MMAN_H
46 #include <sys/mman.h>
47 #endif
48 #include "windef.h"
49 #include "winbase.h"
50 #include "winerror.h"
51 #include "callback.h"
52 #include "file.h"
53 #include "heap.h"
54 #include "neexe.h"
55 #include "peexe.h"
56 #include "process.h"
57 #include "thread.h"
58 #include "pe_image.h"
59 #include "module.h"
60 #include "global.h"
61 #include "task.h"
62 #include "snoop.h"
63 #include "server.h"
64 #include "debugtools.h"
65
66 DEFAULT_DEBUG_CHANNEL(win32)
67 DECLARE_DEBUG_CHANNEL(delayhlp)
68 DECLARE_DEBUG_CHANNEL(fixup)
69 DECLARE_DEBUG_CHANNEL(module)
70 DECLARE_DEBUG_CHANNEL(relay)
71 DECLARE_DEBUG_CHANNEL(segment)
72
73
74 /* convert PE image VirtualAddress to Real Address */
75 #define RVA(x) ((void *)((char *)load_addr+(unsigned int)(x)))
76
77 #define AdjustPtr(ptr,delta) ((char *)(ptr) + (delta))
78
79 void dump_exports( HMODULE hModule )
80
81   char          *Module;
82   int           i, j;
83   u_short       *ordinal;
84   u_long        *function,*functions;
85   u_char        **name;
86   unsigned int load_addr = hModule;
87
88   DWORD rva_start = PE_HEADER(hModule)->OptionalHeader
89                    .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
90   DWORD rva_end = rva_start + PE_HEADER(hModule)->OptionalHeader
91                    .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
92   IMAGE_EXPORT_DIRECTORY *pe_exports = (IMAGE_EXPORT_DIRECTORY*)RVA(rva_start);
93
94   Module = (char*)RVA(pe_exports->Name);
95   TRACE("*******EXPORT DATA*******\n");
96   TRACE("Module name is %s, %ld functions, %ld names\n", 
97         Module, pe_exports->NumberOfFunctions, pe_exports->NumberOfNames);
98
99   ordinal=(u_short*) RVA(pe_exports->AddressOfNameOrdinals);
100   functions=function=(u_long*) RVA(pe_exports->AddressOfFunctions);
101   name=(u_char**) RVA(pe_exports->AddressOfNames);
102
103   TRACE(" Ord    RVA     Addr   Name\n" );
104   for (i=0;i<pe_exports->NumberOfFunctions;i++, function++)
105   {
106       if (!*function) continue;  /* No such function */
107       if (TRACE_ON(win32))
108       {
109         DPRINTF( "%4ld %08lx %p", i + pe_exports->Base, *function, RVA(*function) );
110         /* Check if we have a name for it */
111         for (j = 0; j < pe_exports->NumberOfNames; j++)
112           if (ordinal[j] == i)
113           {
114               DPRINTF( "  %s", (char*)RVA(name[j]) );
115               break;
116           }
117         if ((*function >= rva_start) && (*function <= rva_end))
118           DPRINTF(" (forwarded -> %s)", (char *)RVA(*function));
119         DPRINTF("\n");
120       }
121   }
122 }
123
124 /* Look up the specified function or ordinal in the exportlist:
125  * If it is a string:
126  *      - look up the name in the Name list. 
127  *      - look up the ordinal with that index.
128  *      - use the ordinal as offset into the functionlist
129  * If it is a ordinal:
130  *      - use ordinal-pe_export->Base as offset into the functionlist
131  */
132 FARPROC PE_FindExportedFunction( 
133         WINE_MODREF *wm,        /* [in] WINE modreference */
134         LPCSTR funcName,        /* [in] function name */
135         BOOL snoop )
136 {
137         u_short                         * ordinals;
138         u_long                          * function;
139         u_char                          ** name, *ename = NULL;
140         int                             i, ordinal;
141         PE_MODREF                       *pem = &(wm->binfmt.pe);
142         IMAGE_EXPORT_DIRECTORY          *exports = pem->pe_export;
143         unsigned int                    load_addr = wm->module;
144         u_long                          rva_start, rva_end, addr;
145         char                            * forward;
146
147         if (HIWORD(funcName))
148                 TRACE("(%s)\n",funcName);
149         else
150                 TRACE("(%d)\n",(int)funcName);
151         if (!exports) {
152                 /* Not a fatal problem, some apps do
153                  * GetProcAddress(0,"RegisterPenApp") which triggers this
154                  * case.
155                  */
156                 WARN("Module %08x(%s)/MODREF %p doesn't have a exports table.\n",wm->module,wm->modname,pem);
157                 return NULL;
158         }
159         ordinals= (u_short*)  RVA(exports->AddressOfNameOrdinals);
160         function= (u_long*)   RVA(exports->AddressOfFunctions);
161         name    = (u_char **) RVA(exports->AddressOfNames);
162         forward = NULL;
163         rva_start = PE_HEADER(wm->module)->OptionalHeader
164                 .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
165         rva_end = rva_start + PE_HEADER(wm->module)->OptionalHeader
166                 .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
167
168         if (HIWORD(funcName))
169         {
170             /* first try a binary search */
171             int min = 0, max = exports->NumberOfNames - 1;
172             while (min <= max)
173             {
174                 int res, pos = (min + max) / 2;
175                 ename = RVA(name[pos]);
176                 if (!(res = strcmp( ename, funcName )))
177                 {
178                     ordinal = ordinals[pos];
179                     goto found;
180                 }
181                 if (res > 0) max = pos - 1;
182                 else min = pos + 1;
183             }
184             /* now try a linear search in case the names aren't sorted properly */
185             for (i = 0; i < exports->NumberOfNames; i++)
186             {
187                 ename = RVA(name[i]);
188                 if (!strcmp( ename, funcName ))
189                 {
190                     ERR( "%s.%s required a linear search\n", wm->modname, funcName );
191                     ordinal = ordinals[i];
192                     goto found;
193                 }
194             }
195             return NULL;
196         }
197         else  /* find by ordinal */
198         {
199             ordinal = LOWORD(funcName) - exports->Base;
200             if (snoop && name)  /* need to find a name for it */
201             {
202                 for (i = 0; i < exports->NumberOfNames; i++)
203                     if (ordinals[i] == ordinal)
204                     {
205                         ename = RVA(name[i]);
206                         break;
207                     }
208             }
209         }
210
211  found:
212         if (ordinal >= exports->NumberOfFunctions)
213         {
214             TRACE("     ordinal %ld out of range!\n", ordinal + exports->Base );
215             return NULL;
216         }
217         addr = function[ordinal];
218         if (!addr) return NULL;
219         if ((addr < rva_start) || (addr >= rva_end))
220         {
221             FARPROC proc = RVA(addr);
222             if (snoop)
223             {
224                 if (!ename) ename = "@";
225                 proc = SNOOP_GetProcAddress(wm->module,ename,ordinal,proc);
226             }
227             return proc;
228         }
229         else  /* forward entry point */
230         {
231                 WINE_MODREF *wm;
232                 char *forward = RVA(addr);
233                 char module[256];
234                 char *end = strchr(forward, '.');
235
236                 if (!end) return NULL;
237                 if (end - forward >= sizeof(module)) return NULL;
238                 memcpy( module, forward, end - forward );
239                 module[end-forward] = 0;
240                 if (!(wm = MODULE_FindModule( module )))
241                 {
242                     ERR("module not found for forward '%s'\n", forward );
243                     return NULL;
244                 }
245                 return MODULE_GetProcAddress( wm->module, end + 1, snoop );
246         }
247 }
248
249 DWORD fixup_imports( WINE_MODREF *wm )
250 {
251     IMAGE_IMPORT_DESCRIPTOR     *pe_imp;
252     PE_MODREF                   *pem;
253     unsigned int load_addr      = wm->module;
254     int                         i,characteristics_detection=1;
255     char                        *modname;
256     
257     assert(wm->type==MODULE32_PE);
258     pem = &(wm->binfmt.pe);
259     if (pem->pe_export)
260         modname = (char*) RVA(pem->pe_export->Name);
261     else
262         modname = "<unknown>";
263
264     /* OK, now dump the import list */
265     TRACE("Dumping imports list\n");
266
267     /* first, count the number of imported non-internal modules */
268     pe_imp = pem->pe_import;
269     if (!pe_imp) return 0;
270
271     /* We assume that we have at least one import with !0 characteristics and
272      * detect broken imports with all characteristsics 0 (notably Borland) and
273      * switch the detection off for them.
274      */
275     for (i = 0; pe_imp->Name ; pe_imp++) {
276         if (!i && !pe_imp->u.Characteristics)
277                 characteristics_detection = 0;
278         if (characteristics_detection && !pe_imp->u.Characteristics)
279                 break;
280         i++;
281     }
282     if (!i) return 0;  /* no imports */
283
284     /* Allocate module dependency list */
285     wm->nDeps = i;
286     wm->deps  = HeapAlloc( GetProcessHeap(), 0, i*sizeof(WINE_MODREF *) );
287
288     /* load the imported modules. They are automatically 
289      * added to the modref list of the process.
290      */
291  
292     for (i = 0, pe_imp = pem->pe_import; pe_imp->Name ; pe_imp++) {
293         WINE_MODREF             *wmImp;
294         IMAGE_IMPORT_BY_NAME    *pe_name;
295         PIMAGE_THUNK_DATA       import_list,thunk_list;
296         char                    *name = (char *) RVA(pe_imp->Name);
297
298         if (characteristics_detection && !pe_imp->u.Characteristics)
299                 break;
300
301         wmImp = MODULE_LoadLibraryExA( name, 0, 0 );
302         if (!wmImp) {
303             ERR_(module)("Module %s not found\n", name);
304             return 1;
305         }
306         wm->deps[i++] = wmImp;
307
308         /* FIXME: forwarder entries ... */
309
310         if (pe_imp->u.OriginalFirstThunk != 0) { /* original MS style */
311             TRACE("Microsoft style imports used\n");
312             import_list =(PIMAGE_THUNK_DATA) RVA(pe_imp->u.OriginalFirstThunk);
313             thunk_list = (PIMAGE_THUNK_DATA) RVA(pe_imp->FirstThunk);
314
315             while (import_list->u1.Ordinal) {
316                 if (IMAGE_SNAP_BY_ORDINAL(import_list->u1.Ordinal)) {
317                     int ordinal = IMAGE_ORDINAL(import_list->u1.Ordinal);
318
319                     TRACE("--- Ordinal %s,%d\n", name, ordinal);
320                     thunk_list->u1.Function=MODULE_GetProcAddress(
321                         wmImp->module, (LPCSTR)ordinal, TRUE
322                     );
323                     if (!thunk_list->u1.Function) {
324                         ERR("No implementation for %s.%d, setting to 0xdeadbeef\n",
325                                 name, ordinal);
326                         thunk_list->u1.Function = (FARPROC)0xdeadbeef;
327                     }
328                 } else {                /* import by name */
329                     pe_name = (PIMAGE_IMPORT_BY_NAME)RVA(import_list->u1.AddressOfData);
330                     TRACE("--- %s %s.%d\n", pe_name->Name, name, pe_name->Hint);
331                     thunk_list->u1.Function=MODULE_GetProcAddress(
332                         wmImp->module, pe_name->Name, TRUE
333                     );
334                     if (!thunk_list->u1.Function) {
335                         ERR("No implementation for %s.%d(%s), setting to 0xdeadbeef\n",
336                                 name,pe_name->Hint,pe_name->Name);
337                         thunk_list->u1.Function = (FARPROC)0xdeadbeef;
338                     }
339                 }
340                 import_list++;
341                 thunk_list++;
342             }
343         } else {        /* Borland style */
344             TRACE("Borland style imports used\n");
345             thunk_list = (PIMAGE_THUNK_DATA) RVA(pe_imp->FirstThunk);
346             while (thunk_list->u1.Ordinal) {
347                 if (IMAGE_SNAP_BY_ORDINAL(thunk_list->u1.Ordinal)) {
348                     /* not sure about this branch, but it seems to work */
349                     int ordinal = IMAGE_ORDINAL(thunk_list->u1.Ordinal);
350
351                     TRACE("--- Ordinal %s.%d\n",name,ordinal);
352                     thunk_list->u1.Function=MODULE_GetProcAddress(
353                         wmImp->module, (LPCSTR) ordinal, TRUE
354                     );
355                     if (!thunk_list->u1.Function) {
356                         ERR("No implementation for %s.%d, setting to 0xdeadbeef\n",
357                                 name,ordinal);
358                         thunk_list->u1.Function = (FARPROC)0xdeadbeef;
359                     }
360                 } else {
361                     pe_name=(PIMAGE_IMPORT_BY_NAME) RVA(thunk_list->u1.AddressOfData);
362                     TRACE("--- %s %s.%d\n",
363                                   pe_name->Name,name,pe_name->Hint);
364                     thunk_list->u1.Function=MODULE_GetProcAddress(
365                         wmImp->module, pe_name->Name, TRUE
366                     );
367                     if (!thunk_list->u1.Function) {
368                         ERR("No implementation for %s.%d, setting to 0xdeadbeef\n",
369                                 name, pe_name->Hint);
370                         thunk_list->u1.Function = (FARPROC)0xdeadbeef;
371                     }
372                 }
373                 thunk_list++;
374             }
375         }
376     }
377     return 0;
378 }
379
380 static int calc_vma_size( HMODULE hModule )
381 {
382     int i,vma_size = 0;
383     IMAGE_SECTION_HEADER *pe_seg = PE_SECTIONS(hModule);
384
385     TRACE("Dump of segment table\n");
386     TRACE("   Name    VSz  Vaddr     SzRaw   Fileadr  *Reloc *Lineum #Reloc #Linum Char\n");
387     for (i = 0; i< PE_HEADER(hModule)->FileHeader.NumberOfSections; i++)
388     {
389         TRACE("%8s: %4.4lx %8.8lx %8.8lx %8.8lx %8.8lx %8.8lx %4.4x %4.4x %8.8lx\n", 
390                       pe_seg->Name, 
391                       pe_seg->Misc.VirtualSize,
392                       pe_seg->VirtualAddress,
393                       pe_seg->SizeOfRawData,
394                       pe_seg->PointerToRawData,
395                       pe_seg->PointerToRelocations,
396                       pe_seg->PointerToLinenumbers,
397                       pe_seg->NumberOfRelocations,
398                       pe_seg->NumberOfLinenumbers,
399                       pe_seg->Characteristics);
400         vma_size=max(vma_size, pe_seg->VirtualAddress+pe_seg->SizeOfRawData);
401         vma_size=max(vma_size, pe_seg->VirtualAddress+pe_seg->Misc.VirtualSize);
402         pe_seg++;
403     }
404     return vma_size;
405 }
406
407 static void do_relocations( unsigned int load_addr, IMAGE_BASE_RELOCATION *r )
408 {
409     int delta = load_addr - PE_HEADER(load_addr)->OptionalHeader.ImageBase;
410     int hdelta = (delta >> 16) & 0xFFFF;
411     int ldelta = delta & 0xFFFF;
412
413         if(delta == 0)
414                 /* Nothing to do */
415                 return;
416         while(r->VirtualAddress)
417         {
418                 char *page = (char*) RVA(r->VirtualAddress);
419                 int count = (r->SizeOfBlock - 8)/2;
420                 int i;
421                 TRACE_(fixup)("%x relocations for page %lx\n",
422                         count, r->VirtualAddress);
423                 /* patching in reverse order */
424                 for(i=0;i<count;i++)
425                 {
426                         int offset = r->TypeOffset[i] & 0xFFF;
427                         int type = r->TypeOffset[i] >> 12;
428                         TRACE_(fixup)("patching %x type %x\n", offset, type);
429                         switch(type)
430                         {
431                         case IMAGE_REL_BASED_ABSOLUTE: break;
432                         case IMAGE_REL_BASED_HIGH:
433                                 *(short*)(page+offset) += hdelta;
434                                 break;
435                         case IMAGE_REL_BASED_LOW:
436                                 *(short*)(page+offset) += ldelta;
437                                 break;
438                         case IMAGE_REL_BASED_HIGHLOW:
439                                 *(int*)(page+offset) += delta;
440                                 /* FIXME: if this is an exported address, fire up enhanced logic */
441                                 break;
442                         case IMAGE_REL_BASED_HIGHADJ:
443                                 FIXME("Don't know what to do with IMAGE_REL_BASED_HIGHADJ\n");
444                                 break;
445                         case IMAGE_REL_BASED_MIPS_JMPADDR:
446                                 FIXME("Is this a MIPS machine ???\n");
447                                 break;
448                         default:
449                                 FIXME("Unknown fixup type\n");
450                                 break;
451                         }
452                 }
453                 r = (IMAGE_BASE_RELOCATION*)((char*)r + r->SizeOfBlock);
454         }
455 }
456                 
457
458         
459         
460
461 /**********************************************************************
462  *                      PE_LoadImage
463  * Load one PE format DLL/EXE into memory
464  * 
465  * Unluckily we can't just mmap the sections where we want them, for 
466  * (at least) Linux does only support offsets which are page-aligned.
467  *
468  * BUT we have to map the whole image anyway, for Win32 programs sometimes
469  * want to access them. (HMODULE32 point to the start of it)
470  */
471 HMODULE PE_LoadImage( HANDLE hFile, LPCSTR filename, WORD *version )
472 {
473     HMODULE     hModule;
474     HANDLE      mapping;
475
476     IMAGE_NT_HEADERS *nt;
477     IMAGE_SECTION_HEADER *pe_sec;
478     IMAGE_DATA_DIRECTORY *dir;
479     BY_HANDLE_FILE_INFORMATION bhfi;
480     int i, rawsize, lowest_va, lowest_fa, vma_size, file_size = 0;
481     DWORD load_addr, aoep, reloc = 0;
482
483     /* Retrieve file size */
484     if ( GetFileInformationByHandle( hFile, &bhfi ) ) 
485         file_size = bhfi.nFileSizeLow; /* FIXME: 64 bit */
486
487     /* Map the PE file somewhere */
488     mapping = CreateFileMappingA( hFile, NULL, PAGE_READONLY | SEC_COMMIT,
489                                     0, 0, NULL );
490     if (!mapping)
491     {
492         WARN("CreateFileMapping error %ld\n", GetLastError() );
493         return 0;
494     }
495     hModule = (HMODULE)MapViewOfFile( mapping, FILE_MAP_READ, 0, 0, 0 );
496     CloseHandle( mapping );
497     if (!hModule)
498     {
499         WARN("MapViewOfFile error %ld\n", GetLastError() );
500         return 0;
501     }
502     if ( *(WORD*)hModule !=IMAGE_DOS_SIGNATURE)
503     {
504         WARN("%s image doesn't have DOS signature, but 0x%04x\n", filename,*(WORD*)hModule);
505         goto error;
506     }
507
508     nt = PE_HEADER( hModule );
509
510     /* Check signature */
511     if ( nt->Signature != IMAGE_NT_SIGNATURE )
512     {
513         WARN("%s image doesn't have PE signature, but 0x%08lx\n", filename, nt->Signature );
514         goto error;
515     }
516
517     /* Check architecture */
518     if ( nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386 )
519     {
520         MESSAGE("Trying to load PE image for unsupported architecture (");
521         switch (nt->FileHeader.Machine)
522         {
523         case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
524         case IMAGE_FILE_MACHINE_I860:    MESSAGE("I860"); break;
525         case IMAGE_FILE_MACHINE_R3000:   MESSAGE("R3000"); break;
526         case IMAGE_FILE_MACHINE_R4000:   MESSAGE("R4000"); break;
527         case IMAGE_FILE_MACHINE_R10000:  MESSAGE("R10000"); break;
528         case IMAGE_FILE_MACHINE_ALPHA:   MESSAGE("Alpha"); break;
529         case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
530         default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
531         }
532         MESSAGE(")\n");
533         goto error;
534     }
535
536     /* Find out how large this executeable should be */
537     pe_sec = PE_SECTIONS( hModule );
538     rawsize = 0; lowest_va = 0x10000; lowest_fa = 0x10000;
539     for (i = 0; i < nt->FileHeader.NumberOfSections; i++) 
540     {
541         if (lowest_va > pe_sec[i].VirtualAddress)
542            lowest_va = pe_sec[i].VirtualAddress;
543         if (pe_sec[i].Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
544             continue;
545         if (pe_sec[i].PointerToRawData < lowest_fa)
546             lowest_fa = pe_sec[i].PointerToRawData;
547         if (pe_sec[i].PointerToRawData+pe_sec[i].SizeOfRawData > rawsize)
548             rawsize = pe_sec[i].PointerToRawData+pe_sec[i].SizeOfRawData;
549     }
550  
551     /* Check file size */
552     if ( file_size && file_size < rawsize )
553     {
554         ERR("PE module is too small (header: %d, filesize: %d), "
555                     "probably truncated download?\n", 
556                     rawsize, file_size );
557         goto error;
558     }
559
560     /* Check entrypoint address */
561     aoep = nt->OptionalHeader.AddressOfEntryPoint;
562     if (aoep && (aoep < lowest_va))
563         FIXME("VIRUS WARNING: '%s' has an invalid entrypoint (0x%08lx) "
564                       "below the first virtual address (0x%08x) "
565                       "(possibly infected by Tchernobyl/SpaceFiller virus)!\n",
566                        filename, aoep, lowest_va );
567
568
569     /* FIXME:  Hack!  While we don't really support shared sections yet,
570      *         this checks for those special cases where the whole DLL
571      *         consists only of shared sections and is mapped into the
572      *         shared address space > 2GB.  In this case, we assume that
573      *         the module got mapped at its base address. Thus we simply
574      *         check whether the module has actually been mapped there
575      *         and use it, if so.  This is needed to get Win95 USER32.DLL
576      *         to work (until we support shared sections properly).
577      */
578
579     if ( nt->OptionalHeader.ImageBase & 0x80000000 )
580     {
581         HMODULE sharedMod = (HMODULE)nt->OptionalHeader.ImageBase; 
582         IMAGE_NT_HEADERS *sharedNt = (PIMAGE_NT_HEADERS)
583                ( (LPBYTE)sharedMod + ((LPBYTE)nt - (LPBYTE)hModule) );
584
585         /* Well, this check is not really comprehensive, 
586            but should be good enough for now ... */
587         if (    !IsBadReadPtr( (LPBYTE)sharedMod, sizeof(IMAGE_DOS_HEADER) )
588              && memcmp( (LPBYTE)sharedMod, (LPBYTE)hModule, sizeof(IMAGE_DOS_HEADER) ) == 0
589              && !IsBadReadPtr( sharedNt, sizeof(IMAGE_NT_HEADERS) )
590              && memcmp( sharedNt, nt, sizeof(IMAGE_NT_HEADERS) ) == 0 )
591         {
592             UnmapViewOfFile( (LPVOID)hModule );
593             return sharedMod;
594         }
595     }
596
597
598     /* Allocate memory for module */
599     load_addr = nt->OptionalHeader.ImageBase;
600     vma_size = calc_vma_size( hModule );
601
602     load_addr = (DWORD)VirtualAlloc( (void*)load_addr, vma_size,
603                                      MEM_RESERVE | MEM_COMMIT,
604                                      PAGE_EXECUTE_READWRITE );
605     if (load_addr == 0) 
606     {
607         /* We need to perform base relocations */
608         dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_BASERELOC;
609         if (dir->Size)
610             reloc = dir->VirtualAddress;
611         else 
612         {
613             FIXME(
614                    "FATAL: Need to relocate %s, but no relocation records present (%s). Try to run that file directly !\n",
615                    filename,
616                    (nt->FileHeader.Characteristics&IMAGE_FILE_RELOCS_STRIPPED)?
617                    "stripped during link" : "unknown reason" );
618             goto error;
619         }
620
621         /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
622          *        really make sure that the *new* base address is also > 2GB.
623          *        Some DLLs really check the MSB of the module handle :-/
624          */
625         if ( nt->OptionalHeader.ImageBase & 0x80000000 )
626             ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
627
628         load_addr = (DWORD)VirtualAlloc( NULL, vma_size,
629                                          MEM_RESERVE | MEM_COMMIT,
630                                          PAGE_EXECUTE_READWRITE );
631         if (!load_addr) {
632             FIXME_(win32)(
633                    "FATAL: Couldn't load module %s (out of memory, %d needed)!\n", filename, vma_size);
634             goto error;
635         }
636     }
637
638     TRACE("Load addr is %lx (base %lx), range %x\n",
639           load_addr, nt->OptionalHeader.ImageBase, vma_size );
640     TRACE_(segment)("Loading %s at %lx, range %x\n",
641                     filename, load_addr, vma_size );
642
643     /* Store the NT header at the load addr */
644     *(PIMAGE_DOS_HEADER)load_addr = *(PIMAGE_DOS_HEADER)hModule;
645     *PE_HEADER( load_addr ) = *nt;
646     memcpy( PE_SECTIONS(load_addr), PE_SECTIONS(hModule),
647             sizeof(IMAGE_SECTION_HEADER) * nt->FileHeader.NumberOfSections );
648 #if 0
649     /* Copies all stuff up to the first section. Including win32 viruses. */
650     memcpy( load_addr, hModule, lowest_fa );
651 #endif
652
653     /* Copy sections into module image */
654     pe_sec = PE_SECTIONS( hModule );
655     for (i = 0; i < nt->FileHeader.NumberOfSections; i++, pe_sec++)
656     {
657         /* memcpy only non-BSS segments */
658         /* FIXME: this should be done by mmap(..MAP_PRIVATE|MAP_FIXED..)
659          * but it is not possible for (at least) Linux needs
660          * a page-aligned offset.
661          */
662         if(!(pe_sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA))
663             memcpy((char*)RVA(pe_sec->VirtualAddress),
664                    (char*)(hModule + pe_sec->PointerToRawData),
665                    pe_sec->SizeOfRawData);
666 #if 0
667         /* not needed, memory is zero */
668         if(strcmp(pe_sec->Name, ".bss") == 0)
669             memset((void *)RVA(pe_sec->VirtualAddress), 0, 
670                    pe_sec->Misc.VirtualSize ?
671                    pe_sec->Misc.VirtualSize :
672                    pe_sec->SizeOfRawData);
673 #endif
674     }
675
676     /* Perform base relocation, if necessary */
677     if ( reloc )
678         do_relocations( load_addr, (IMAGE_BASE_RELOCATION *)RVA(reloc) );
679
680     /* Get expected OS / Subsystem version */
681     *version =   ( (nt->OptionalHeader.MajorSubsystemVersion & 0xff) << 8 )
682                |   (nt->OptionalHeader.MinorSubsystemVersion & 0xff);
683
684     /* We don't need the orignal mapping any more */
685     UnmapViewOfFile( (LPVOID)hModule );
686     return (HMODULE)load_addr;
687
688 error:
689     UnmapViewOfFile( (LPVOID)hModule );
690     return 0;
691 }
692
693 /**********************************************************************
694  *                 PE_CreateModule
695  *
696  * Create WINE_MODREF structure for loaded HMODULE32, link it into
697  * process modref_list, and fixup all imports.
698  *
699  * Note: hModule must point to a correctly allocated PE image,
700  *       with base relocations applied; the 16-bit dummy module
701  *       associated to hModule must already exist.
702  *
703  * Note: This routine must always be called in the context of the
704  *       process that is to own the module to be created.
705  */
706 WINE_MODREF *PE_CreateModule( HMODULE hModule, 
707                               LPCSTR filename, DWORD flags, BOOL builtin )
708 {
709     DWORD load_addr = (DWORD)hModule;  /* for RVA */
710     IMAGE_NT_HEADERS *nt = PE_HEADER(hModule);
711     IMAGE_DATA_DIRECTORY *dir;
712     IMAGE_IMPORT_DESCRIPTOR *pe_import = NULL;
713     IMAGE_EXPORT_DIRECTORY *pe_export = NULL;
714     IMAGE_RESOURCE_DIRECTORY *pe_resource = NULL;
715     WINE_MODREF *wm;
716     int result;
717
718
719     /* Retrieve DataDirectory entries */
720
721     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_EXPORT;
722     if (dir->Size)
723         pe_export = (PIMAGE_EXPORT_DIRECTORY)RVA(dir->VirtualAddress);
724
725     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_IMPORT;
726     if (dir->Size)
727         pe_import = (PIMAGE_IMPORT_DESCRIPTOR)RVA(dir->VirtualAddress);
728
729     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_RESOURCE;
730     if (dir->Size)
731         pe_resource = (PIMAGE_RESOURCE_DIRECTORY)RVA(dir->VirtualAddress);
732
733     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_EXCEPTION;
734     if (dir->Size) FIXME("Exception directory ignored\n" );
735
736     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_SECURITY;
737     if (dir->Size) FIXME("Security directory ignored\n" );
738
739     /* IMAGE_DIRECTORY_ENTRY_BASERELOC handled in PE_LoadImage */
740     /* IMAGE_DIRECTORY_ENTRY_DEBUG handled by debugger */
741
742     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_DEBUG;
743     if (dir->Size) TRACE("Debug directory ignored\n" );
744
745     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_COPYRIGHT;
746     if (dir->Size) FIXME("Copyright string ignored\n" );
747
748     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_GLOBALPTR;
749     if (dir->Size) FIXME("Global Pointer (MIPS) ignored\n" );
750
751     /* IMAGE_DIRECTORY_ENTRY_TLS handled in PE_TlsInit */
752
753     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG;
754     if (dir->Size) FIXME("Load Configuration directory ignored\n" );
755
756     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT;
757     if (dir->Size) TRACE("Bound Import directory ignored\n" );
758
759     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_IAT;
760     if (dir->Size) TRACE("Import Address Table directory ignored\n" );
761
762     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT;
763     if (dir->Size)
764     {
765                 TRACE("Delayed import, stub calls LoadLibrary\n" );
766                 /*
767                  * Nothing to do here.
768                  */
769
770 #ifdef ImgDelayDescr
771                 /*
772                  * This code is useful to observe what the heck is going on.
773                  */
774                 {
775                 ImgDelayDescr *pe_delay = NULL;
776         pe_delay = (PImgDelayDescr)RVA(dir->VirtualAddress);
777         TRACE_(delayhlp)("pe_delay->grAttrs = %08x\n", pe_delay->grAttrs);
778         TRACE_(delayhlp)("pe_delay->szName = %s\n", pe_delay->szName);
779         TRACE_(delayhlp)("pe_delay->phmod = %08x\n", pe_delay->phmod);
780         TRACE_(delayhlp)("pe_delay->pIAT = %08x\n", pe_delay->pIAT);
781         TRACE_(delayhlp)("pe_delay->pINT = %08x\n", pe_delay->pINT);
782         TRACE_(delayhlp)("pe_delay->pBoundIAT = %08x\n", pe_delay->pBoundIAT);
783         TRACE_(delayhlp)("pe_delay->pUnloadIAT = %08x\n", pe_delay->pUnloadIAT);
784         TRACE_(delayhlp)("pe_delay->dwTimeStamp = %08x\n", pe_delay->dwTimeStamp);
785         }
786 #endif /* ImgDelayDescr */
787         }
788
789     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR;
790     if (dir->Size) FIXME("Unknown directory 14 ignored\n" );
791
792     dir = nt->OptionalHeader.DataDirectory+15;
793     if (dir->Size) FIXME("Unknown directory 15 ignored\n" );
794
795
796     /* Allocate and fill WINE_MODREF */
797
798     wm = (WINE_MODREF *)HeapAlloc( GetProcessHeap(), 
799                                    HEAP_ZERO_MEMORY, sizeof(*wm) );
800     wm->module = hModule;
801
802     if ( builtin ) 
803         wm->flags |= WINE_MODREF_INTERNAL;
804     if ( flags & DONT_RESOLVE_DLL_REFERENCES )
805         wm->flags |= WINE_MODREF_DONT_RESOLVE_REFS;
806     if ( flags & LOAD_LIBRARY_AS_DATAFILE )
807         wm->flags |= WINE_MODREF_LOAD_AS_DATAFILE;
808
809     wm->type = MODULE32_PE;
810     wm->binfmt.pe.pe_export = pe_export;
811     wm->binfmt.pe.pe_import = pe_import;
812     wm->binfmt.pe.pe_resource = pe_resource;
813     wm->binfmt.pe.tlsindex = -1;
814
815     wm->filename = HEAP_strdupA( GetProcessHeap(), 0, filename );
816     wm->modname = strrchr( wm->filename, '\\' );
817     if (!wm->modname) wm->modname = wm->filename;
818     else wm->modname++;
819
820     result = GetShortPathNameA( wm->filename, NULL, 0 );
821     wm->short_filename = (char *)HeapAlloc( GetProcessHeap(), 0, result+1 );
822     GetShortPathNameA( wm->filename, wm->short_filename, result+1 );
823     wm->short_modname = strrchr( wm->short_filename, '\\' );
824     if (!wm->short_modname) wm->short_modname = wm->short_filename;
825     else wm->short_modname++;
826
827     /* Link MODREF into process list */
828
829     EnterCriticalSection( &PROCESS_Current()->crit_section );
830
831     wm->next = PROCESS_Current()->modref_list;
832     PROCESS_Current()->modref_list = wm;
833     if ( wm->next ) wm->next->prev = wm;
834
835     if (    !( nt->FileHeader.Characteristics & IMAGE_FILE_DLL )
836          && !( wm->flags & WINE_MODREF_LOAD_AS_DATAFILE ) )
837
838     {
839         if ( PROCESS_Current()->exe_modref )
840             FIXME( "Trying to load second .EXE file: %s\n", filename );
841         else
842             PROCESS_Current()->exe_modref = wm;
843     }
844
845     LeaveCriticalSection( &PROCESS_Current()->crit_section );
846
847
848     /* Dump Exports */
849
850     if ( pe_export )
851         dump_exports( hModule );
852
853     /* Fixup Imports */
854
855     if (    pe_import
856          && !( wm->flags & WINE_MODREF_LOAD_AS_DATAFILE )
857          && !( wm->flags & WINE_MODREF_DONT_RESOLVE_REFS ) 
858          && fixup_imports( wm ) ) 
859     {
860         /* remove entry from modref chain */
861         EnterCriticalSection( &PROCESS_Current()->crit_section );
862
863         if ( !wm->prev )
864             PROCESS_Current()->modref_list = wm->next;
865         else
866             wm->prev->next = wm->next;
867
868         if ( wm->next ) wm->next->prev = wm->prev;
869         wm->next = wm->prev = NULL;
870
871         LeaveCriticalSection( &PROCESS_Current()->crit_section );
872
873         /* FIXME: there are several more dangling references
874          * left. Including dlls loaded by this dll before the
875          * failed one. Unrolling is rather difficult with the
876          * current structure and we can leave it them lying
877          * around with no problems, so we don't care.
878          * As these might reference our wm, we don't free it.
879          */
880          return NULL;
881     }
882
883     return wm;
884 }
885
886 /******************************************************************************
887  * The PE Library Loader frontend. 
888  * FIXME: handle the flags.
889  */
890 WINE_MODREF *PE_LoadLibraryExA (LPCSTR name, DWORD flags)
891 {
892         struct load_dll_request *req = get_req_buffer();
893         HMODULE         hModule32;
894         HMODULE16       hModule16;
895         NE_MODULE       *pModule;
896         WINE_MODREF     *wm;
897         char            filename[256];
898         HANDLE          hFile;
899         WORD            version = 0;
900
901         /* Search for and open PE file */
902         if ( SearchPathA( NULL, name, ".DLL", 
903                           sizeof(filename), filename, NULL ) == 0 ) return NULL;
904        
905         hFile = CreateFileA( filename, GENERIC_READ, FILE_SHARE_READ,
906                              NULL, OPEN_EXISTING, 0, -1 );
907         if ( hFile == INVALID_HANDLE_VALUE ) return NULL;
908         
909         /* Load PE module */
910         hModule32 = PE_LoadImage( hFile, filename, &version );
911         if (!hModule32)
912         {
913                 CloseHandle( hFile );
914                 SetLastError( ERROR_OUTOFMEMORY );      /* Not entirely right, but good enough */
915                 return NULL;
916         }
917
918         /* Create 16-bit dummy module */
919         if ((hModule16 = MODULE_CreateDummyModule( filename, version )) < 32)
920         {
921                 CloseHandle( hFile );
922                 SetLastError( (DWORD)hModule16 );       /* This should give the correct error */
923                 return NULL;
924         }
925         pModule = (NE_MODULE *)GlobalLock16( hModule16 );
926         pModule->flags    = NE_FFLAGS_LIBMODULE | NE_FFLAGS_SINGLEDATA | NE_FFLAGS_WIN32;
927         pModule->module32 = hModule32;
928
929         /* Create 32-bit MODREF */
930         if ( !(wm = PE_CreateModule( hModule32, filename, flags, FALSE )) )
931         {
932                 ERR( "can't load %s\n", filename );
933                 FreeLibrary16( hModule16 );
934                 CloseHandle( hFile );
935                 SetLastError( ERROR_OUTOFMEMORY );
936                 return NULL;
937         }
938
939         if (wm->binfmt.pe.pe_export)
940                 SNOOP_RegisterDLL(wm->module,wm->modname,wm->binfmt.pe.pe_export->NumberOfFunctions);
941         req->handle     = hFile;
942         req->base       = (void *)hModule32;
943         req->dbg_offset = 0;
944         req->dbg_size   = 0;
945         req->name       = &wm->modname;
946         server_call_noerr( REQ_LOAD_DLL );
947         CloseHandle( hFile );
948         return wm;
949 }
950
951
952 /*****************************************************************************
953  *      PE_UnloadLibrary
954  *
955  * Unload the library unmapping the image and freeing the modref structure.
956  */
957 void PE_UnloadLibrary(WINE_MODREF *wm)
958 {
959     DWORD vma_size = calc_vma_size( wm->module );
960     VirtualFree( (LPVOID)wm->module, vma_size, MEM_RELEASE );
961
962     HeapFree( GetProcessHeap(), 0, wm->filename );
963     HeapFree( GetProcessHeap(), 0, wm->short_filename );
964     HeapFree( GetProcessHeap(), 0, wm );
965 }
966
967 /*****************************************************************************
968  * Load the PE main .EXE. All other loading is done by PE_LoadLibraryExA
969  * FIXME: this function should use PE_LoadLibraryExA, but currently can't
970  * due to the PROCESS_Create stuff.
971  */
972 BOOL PE_CreateProcess( HANDLE hFile, LPCSTR filename, LPCSTR cmd_line, LPCSTR env, 
973                        LPSECURITY_ATTRIBUTES psa, LPSECURITY_ATTRIBUTES tsa,
974                        BOOL inherit, DWORD flags, LPSTARTUPINFOA startup,
975                        LPPROCESS_INFORMATION info )
976 {
977     WORD version = 0;
978     HMODULE16 hModule16;
979     HMODULE hModule32;
980     NE_MODULE *pModule;
981
982     /* Load file */
983     if ( (hModule32 = PE_LoadImage( hFile, filename, &version )) < 32 )
984     {
985         SetLastError( hModule32 );
986         return FALSE;
987     }
988 #if 0
989     if (PE_HEADER(hModule32)->FileHeader.Characteristics & IMAGE_FILE_DLL)
990     {
991         SetLastError( 20 );  /* FIXME: not the right error code */
992         return FALSE;
993     }
994 #endif
995
996     /* Create 16-bit dummy module */
997     if ( (hModule16 = MODULE_CreateDummyModule( filename, version )) < 32 ) 
998     {
999         SetLastError( hModule16 );
1000         return FALSE;
1001     }
1002     pModule = (NE_MODULE *)GlobalLock16( hModule16 );
1003     pModule->flags    = NE_FFLAGS_WIN32;
1004     pModule->module32 = hModule32;
1005
1006     /* Create new process */
1007     if ( !PROCESS_Create( pModule, hFile, cmd_line, env,
1008                           psa, tsa, inherit, flags, startup, info ) )
1009         return FALSE;
1010
1011     /* Note: PE_CreateModule and the remaining process initialization will
1012              be done in the context of the new process, in TASK_CallToStart */
1013
1014     return TRUE;
1015 }
1016
1017 /*********************************************************************
1018  * PE_UnloadImage [internal]
1019  */
1020 int PE_UnloadImage( HMODULE hModule )
1021 {
1022         FIXME("stub.\n");
1023         /* free resources, image, unmap */
1024         return 1;
1025 }
1026
1027 /* Called if the library is loaded or freed.
1028  * NOTE: if a thread attaches a DLL, the current thread will only do
1029  * DLL_PROCESS_ATTACH. Only new created threads do DLL_THREAD_ATTACH
1030  * (SDK)
1031  */
1032 BOOL PE_InitDLL( WINE_MODREF *wm, DWORD type, LPVOID lpReserved )
1033 {
1034     BOOL retv = TRUE;
1035     assert( wm->type == MODULE32_PE );
1036
1037     /* Is this a library? And has it got an entrypoint? */
1038     if ((PE_HEADER(wm->module)->FileHeader.Characteristics & IMAGE_FILE_DLL) &&
1039         (PE_HEADER(wm->module)->OptionalHeader.AddressOfEntryPoint)
1040     ) {
1041         DLLENTRYPROC entry = (void*)RVA_PTR( wm->module,OptionalHeader.AddressOfEntryPoint );
1042         TRACE_(relay)("CallTo32(entryproc=%p,module=%08x,type=%ld,res=%p)\n",
1043                        entry, wm->module, type, lpReserved );
1044
1045         retv = entry( wm->module, type, lpReserved );
1046     }
1047
1048     return retv;
1049 }
1050
1051 /************************************************************************
1052  *      PE_InitTls                      (internal)
1053  *
1054  * If included, initialises the thread local storages of modules.
1055  * Pointers in those structs are not RVAs but real pointers which have been
1056  * relocated by do_relocations() already.
1057  */
1058 static LPVOID
1059 _fixup_address(PIMAGE_OPTIONAL_HEADER opt,int delta,LPVOID addr) {
1060         if (    ((DWORD)addr>opt->ImageBase) &&
1061                 ((DWORD)addr<opt->ImageBase+opt->SizeOfImage)
1062         )
1063                 /* the address has not been relocated! */
1064                 return (LPVOID)(((DWORD)addr)+delta);
1065         else
1066                 /* the address has been relocated already */
1067                 return addr;
1068 }
1069 void PE_InitTls( void )
1070 {
1071         WINE_MODREF             *wm;
1072         PE_MODREF               *pem;
1073         IMAGE_NT_HEADERS        *peh;
1074         DWORD                   size,datasize;
1075         LPVOID                  mem;
1076         PIMAGE_TLS_DIRECTORY    pdir;
1077         int delta;
1078         
1079         for (wm = PROCESS_Current()->modref_list;wm;wm=wm->next) {
1080                 if (wm->type!=MODULE32_PE)
1081                         continue;
1082                 pem = &(wm->binfmt.pe);
1083                 peh = PE_HEADER(wm->module);
1084                 delta = wm->module - peh->OptionalHeader.ImageBase;
1085                 if (!peh->OptionalHeader.DataDirectory[IMAGE_FILE_THREAD_LOCAL_STORAGE].VirtualAddress)
1086                         continue;
1087                 pdir = (LPVOID)(wm->module + peh->OptionalHeader.
1088                         DataDirectory[IMAGE_FILE_THREAD_LOCAL_STORAGE].VirtualAddress);
1089                 
1090                 
1091                 if ( pem->tlsindex == -1 ) {
1092                         LPDWORD xaddr;
1093                         pem->tlsindex = TlsAlloc();
1094                         xaddr = _fixup_address(&(peh->OptionalHeader),delta,
1095                                         pdir->AddressOfIndex
1096                         );
1097                         *xaddr=pem->tlsindex;
1098                 }
1099                 datasize= pdir->EndAddressOfRawData-pdir->StartAddressOfRawData;
1100                 size    = datasize + pdir->SizeOfZeroFill;
1101                 mem=VirtualAlloc(0,size,MEM_RESERVE|MEM_COMMIT,PAGE_READWRITE);
1102                 memcpy(mem,_fixup_address(&(peh->OptionalHeader),delta,(LPVOID)pdir->StartAddressOfRawData),datasize);
1103                 if (pdir->AddressOfCallBacks) {
1104                      PIMAGE_TLS_CALLBACK *cbs; 
1105
1106                      cbs = _fixup_address(&(peh->OptionalHeader),delta,pdir->AddressOfCallBacks);
1107                      if (*cbs)
1108                        FIXME("TLS Callbacks aren't going to be called\n");
1109                 }
1110
1111                 TlsSetValue( pem->tlsindex, mem );
1112         }
1113 }
1114