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1 /*
2  * $Id$
3  *
4  *  Copyright    1994    Eric Youndale & Erik Bos
5  *  Copyright    1995    Martin von Löwis
6  *  Copyright   1996-98 Marcus Meissner
7  *
8  *    based on Eric Youndale's pe-test and:
9  *
10  *    ftp.microsoft.com:/pub/developer/MSDN/CD8/PEFILE.ZIP
11  * make that:
12  *    ftp.microsoft.com:/developr/MSDN/OctCD/PEFILE.ZIP
13  *
14  * Modified for use with MPlayer, detailed CVS changelog at
15  * http://www.mplayerhq.hu/cgi-bin/cvsweb.cgi/main/
16  *
17  * File now distributed as part of VLC media player with no modifications.
18  *
19  * This program is free software; you can redistribute it and/or modify
20  * it under the terms of the GNU General Public License as published by
21  * the Free Software Foundation; either version 2 of the License, or
22  * (at your option) any later version.
23  *
24  * This program is distributed in the hope that it will be useful,
25  * but WITHOUT ANY WARRANTY; without even the implied warranty of
26  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
27  * GNU General Public License for more details.
28  *
29  * You should have received a copy of the GNU General Public License
30  * along with this program; if not, write to the Free Software
31  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
32  */
33 /* Notes:
34  * Before you start changing something in this file be aware of the following:
35  *
36  * - There are several functions called recursively. In a very subtle and
37  *   obscure way. DLLs can reference each other recursively etc.
38  * - If you want to enhance, speed up or clean up something in here, think
39  *   twice WHY it is implemented in that strange way. There is usually a reason.
40  *   Though sometimes it might just be lazyness ;)
41  * - In PE_MapImage, right before fixup_imports() all external and internal
42  *   state MUST be correct since this function can be called with the SAME image
43  *   AGAIN. (Thats recursion for you.) That means MODREF.module and
44  *   NE_MODULE.module32.
45  * - Sometimes, we can't use Linux mmap() to mmap() the images directly.
46  *
47  *   The problem is, that there is not direct 1:1 mapping from a diskimage and
48  *   a memoryimage. The headers at the start are mapped linear, but the sections
49  *   are not. Older x86 pe binaries are 512 byte aligned in file and 4096 byte
50  *   aligned in memory. Linux likes them 4096 byte aligned in memory (due to
51  *   x86 pagesize, this cannot be fixed without a rather large kernel rewrite)
52  *   and 'blocksize' file-aligned (offsets). Since we have 512/1024/2048 (CDROM)
53  *   and other byte blocksizes, we can't always do this.  We *can* do this for
54  *   newer pe binaries produced by MSVC 5 and later, since they are also aligned
55  *   to 4096 byte boundaries on disk.
56  */
57 #include "config.h"
58
59 #include <errno.h>
60 #include <assert.h>
61 #include <stdio.h>
62 #include <stdlib.h>
63 #include <string.h>
64 #include <unistd.h>
65 #include <sys/types.h>
66 #include <sys/stat.h>
67 #include <fcntl.h>
68 #ifdef HAVE_SYS_MMAN_H
69 #include <sys/mman.h>
70 #endif
71 #include "wine/windef.h"
72 #include "wine/winbase.h"
73 #include "wine/winerror.h"
74 #include "wine/heap.h"
75 #include "wine/pe_image.h"
76 #include "wine/module.h"
77 #include "wine/debugtools.h"
78 #include "ext.h"
79 #include "win32.h"
80
81 #define RVA(x) ((void *)((char *)load_addr+(unsigned int)(x)))
82
83 #define AdjustPtr(ptr,delta) ((char *)(ptr) + (delta))
84
85 extern void* LookupExternal(const char* library, int ordinal);
86 extern void* LookupExternalByName(const char* library, const char* name);
87
88 static void dump_exports( HMODULE hModule )
89 {
90   char        *Module;
91   unsigned int i, j;
92   u_short    *ordinal;
93   u_long    *function,*functions;
94   u_char    **name;
95   unsigned int load_addr = hModule;
96
97   DWORD rva_start = PE_HEADER(hModule)->OptionalHeader
98                    .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
99   DWORD rva_end = rva_start + PE_HEADER(hModule)->OptionalHeader
100                    .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
101   IMAGE_EXPORT_DIRECTORY *pe_exports = (IMAGE_EXPORT_DIRECTORY*)RVA(rva_start);
102
103   Module = (char*)RVA(pe_exports->Name);
104   TRACE("*******EXPORT DATA*******\n");
105   TRACE("Module name is %s, %ld functions, %ld names\n",
106         Module, pe_exports->NumberOfFunctions, pe_exports->NumberOfNames);
107
108   ordinal=(u_short*) RVA(pe_exports->AddressOfNameOrdinals);
109   functions=function=(u_long*) RVA(pe_exports->AddressOfFunctions);
110   name=(u_char**) RVA(pe_exports->AddressOfNames);
111
112   TRACE(" Ord    RVA     Addr   Name\n" );
113   for (i=0;i<pe_exports->NumberOfFunctions;i++, function++)
114   {
115       if (!*function) continue;
116       if (TRACE_ON(win32))
117       {
118     DPRINTF( "%4ld %08lx %p", i + pe_exports->Base, *function, RVA(*function) );
119     
120     for (j = 0; j < pe_exports->NumberOfNames; j++)
121           if (ordinal[j] == i)
122           {
123               DPRINTF( "  %s", (char*)RVA(name[j]) );
124               break;
125           }
126     if ((*function >= rva_start) && (*function <= rva_end))
127       DPRINTF(" (forwarded -> %s)", (char *)RVA(*function));
128     DPRINTF("\n");
129       }
130   }
131 }
132
133 /* Look up the specified function or ordinal in the exportlist:
134  * If it is a string:
135  *     - look up the name in the Name list.
136  *    - look up the ordinal with that index.
137  *    - use the ordinal as offset into the functionlist
138  * If it is a ordinal:
139  *    - use ordinal-pe_export->Base as offset into the functionlist
140  */
141 FARPROC PE_FindExportedFunction(
142     WINE_MODREF *wm,    
143     LPCSTR funcName,    
144         WIN_BOOL snoop )
145 {
146     u_short                * ordinals;
147     u_long                * function;
148     u_char                ** name;
149     const char *ename = NULL;
150     int                i, ordinal;
151     PE_MODREF            *pem = &(wm->binfmt.pe);
152     IMAGE_EXPORT_DIRECTORY         *exports = pem->pe_export;
153     unsigned int            load_addr = wm->module;
154     u_long                rva_start, rva_end, addr;
155     char                * forward;
156
157     if (HIWORD(funcName))
158         TRACE("(%s)\n",funcName);
159     else
160         TRACE("(%d)\n",(int)funcName);
161     if (!exports) {
162         /* Not a fatal problem, some apps do
163          * GetProcAddress(0,"RegisterPenApp") which triggers this
164          * case.
165          */
166         WARN("Module %08x(%s)/MODREF %p doesn't have a exports table.\n",wm->module,wm->modname,pem);
167         return NULL;
168     }
169     ordinals= (u_short*)  RVA(exports->AddressOfNameOrdinals);
170     function= (u_long*)   RVA(exports->AddressOfFunctions);
171     name    = (u_char **) RVA(exports->AddressOfNames);
172     forward = NULL;
173     rva_start = PE_HEADER(wm->module)->OptionalHeader
174         .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
175     rva_end = rva_start + PE_HEADER(wm->module)->OptionalHeader
176         .DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].Size;
177
178     if (HIWORD(funcName))
179         {
180  
181             int min = 0, max = exports->NumberOfNames - 1;
182             while (min <= max)
183             {
184                 int res, pos = (min + max) / 2;
185         ename = (const char*) RVA(name[pos]);
186         if (!(res = strcmp( ename, funcName )))
187                 {
188                     ordinal = ordinals[pos];
189                     goto found;
190                 }
191                 if (res > 0) max = pos - 1;
192                 else min = pos + 1;
193             }
194  
195         for (i = 0; i < exports->NumberOfNames; i++)
196             {
197         ename = (const char*) RVA(name[i]);
198                 if (!strcmp( ename, funcName ))
199                 {
200             ERR( "%s.%s required a linear search\n", wm->modname, funcName );
201                     ordinal = ordinals[i];
202                     goto found;
203                 }
204             }
205             return NULL;
206     }
207         else
208         {
209             ordinal = LOWORD(funcName) - exports->Base;
210             if (snoop && name)
211             {
212                 for (i = 0; i < exports->NumberOfNames; i++)
213                     if (ordinals[i] == ordinal)
214                     {
215                         ename = RVA(name[i]);
216                         break;
217                     }
218             }
219     }
220
221  found:
222         if (ordinal >= exports->NumberOfFunctions)
223         {
224             TRACE("    ordinal %ld out of range!\n", ordinal + exports->Base );
225             return NULL;
226         }
227         addr = function[ordinal];
228         if (!addr) return NULL;
229         if ((addr < rva_start) || (addr >= rva_end))
230         {
231             FARPROC proc = RVA(addr);
232             if (snoop)
233             {
234                 if (!ename) ename = "@";
235 //                proc = SNOOP_GetProcAddress(wm->module,ename,ordinal,proc);
236         TRACE("SNOOP_GetProcAddress n/a\n");
237         
238             }
239             return proc;
240         }
241         else
242         {
243                 WINE_MODREF *wm;
244                 char *forward = RVA(addr);
245         char module[256];
246         char *end = strchr(forward, '.');
247
248         if (!end) return NULL;
249                 if (end - forward >= sizeof(module)) return NULL;
250                 memcpy( module, forward, end - forward );
251         module[end-forward] = 0;
252                 if (!(wm = MODULE_FindModule( module )))
253                 {
254                     ERR("module not found for forward '%s'\n", forward );
255                     return NULL;
256                 }
257         return MODULE_GetProcAddress( wm->module, end + 1, snoop );
258     }
259 }
260
261 static DWORD fixup_imports( WINE_MODREF *wm )
262 {
263     IMAGE_IMPORT_DESCRIPTOR    *pe_imp;
264     PE_MODREF            *pem;
265     unsigned int load_addr    = wm->module;
266     int                i,characteristics_detection=1;
267     char            *modname;
268  
269     assert(wm->type==MODULE32_PE);
270     pem = &(wm->binfmt.pe);
271     if (pem->pe_export)
272         modname = (char*) RVA(pem->pe_export->Name);
273     else
274         modname = "<unknown>";
275
276  
277     TRACE("Dumping imports list\n");
278
279  
280     pe_imp = pem->pe_import;
281     if (!pe_imp) return 0;
282
283     /* We assume that we have at least one import with !0 characteristics and
284      * detect broken imports with all characteristsics 0 (notably Borland) and
285      * switch the detection off for them.
286      */
287     for (i = 0; pe_imp->Name ; pe_imp++) {
288     if (!i && !pe_imp->u.Characteristics)
289         characteristics_detection = 0;
290     if (characteristics_detection && !pe_imp->u.Characteristics)
291         break;
292     i++;
293     }
294     if (!i) return 0;
295
296  
297     wm->nDeps = i;
298     wm->deps  = HeapAlloc( GetProcessHeap(), 0, i*sizeof(WINE_MODREF *) );
299
300     /* load the imported modules. They are automatically
301      * added to the modref list of the process.
302      */
303  
304     for (i = 0, pe_imp = pem->pe_import; pe_imp->Name ; pe_imp++) {
305         WINE_MODREF        *wmImp;
306     IMAGE_IMPORT_BY_NAME    *pe_name;
307     PIMAGE_THUNK_DATA    import_list,thunk_list;
308      char            *name = (char *) RVA(pe_imp->Name);
309
310     if (characteristics_detection && !pe_imp->u.Characteristics)
311         break;
312
313 //#warning FIXME: here we should fill imports
314         TRACE("Loading imports for %s.dll\n", name);
315  
316     if (pe_imp->u.OriginalFirstThunk != 0) {
317         TRACE("Microsoft style imports used\n");
318         import_list =(PIMAGE_THUNK_DATA) RVA(pe_imp->u.OriginalFirstThunk);
319         thunk_list = (PIMAGE_THUNK_DATA) RVA(pe_imp->FirstThunk);
320
321         while (import_list->u1.Ordinal) {
322         if (IMAGE_SNAP_BY_ORDINAL(import_list->u1.Ordinal)) {
323             int ordinal = IMAGE_ORDINAL(import_list->u1.Ordinal);
324
325 //            TRACE("--- Ordinal %s,%d\n", name, ordinal);
326         
327             thunk_list->u1.Function=LookupExternal(name, ordinal);
328         } else {        
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=LookupExternalByName(name, pe_name->Name);
332         }
333         import_list++;
334         thunk_list++;
335         }
336     } else {    
337         TRACE("Borland style imports used\n");
338         thunk_list = (PIMAGE_THUNK_DATA) RVA(pe_imp->FirstThunk);
339         while (thunk_list->u1.Ordinal) {
340         if (IMAGE_SNAP_BY_ORDINAL(thunk_list->u1.Ordinal)) {
341         
342             int ordinal = IMAGE_ORDINAL(thunk_list->u1.Ordinal);
343
344             TRACE("--- Ordinal %s.%d\n",name,ordinal);
345             thunk_list->u1.Function=LookupExternal(
346               name, ordinal);
347         } else {
348             pe_name=(PIMAGE_IMPORT_BY_NAME) RVA(thunk_list->u1.AddressOfData);
349             TRACE("--- %s %s.%d\n",
350                      pe_name->Name,name,pe_name->Hint);
351             thunk_list->u1.Function=LookupExternalByName(
352               name, pe_name->Name);
353         }
354         thunk_list++;
355         }
356     }
357     }
358     return 0;
359 }
360
361 static int calc_vma_size( HMODULE hModule )
362 {
363     int i,vma_size = 0;
364     IMAGE_SECTION_HEADER *pe_seg = PE_SECTIONS(hModule);
365
366     TRACE("Dump of segment table\n");
367     TRACE("   Name    VSz  Vaddr     SzRaw   Fileadr  *Reloc *Lineum #Reloc #Linum Char\n");
368     for (i = 0; i< PE_HEADER(hModule)->FileHeader.NumberOfSections; i++)
369     {
370         TRACE("%8s: %4.4lx %8.8lx %8.8lx %8.8lx %8.8lx %8.8lx %4.4x %4.4x %8.8lx\n",
371                       pe_seg->Name,
372                       pe_seg->Misc.VirtualSize,
373                       pe_seg->VirtualAddress,
374                       pe_seg->SizeOfRawData,
375                       pe_seg->PointerToRawData,
376                       pe_seg->PointerToRelocations,
377                       pe_seg->PointerToLinenumbers,
378                       pe_seg->NumberOfRelocations,
379                       pe_seg->NumberOfLinenumbers,
380                       pe_seg->Characteristics);
381         vma_size=max(vma_size, pe_seg->VirtualAddress+pe_seg->SizeOfRawData);
382         vma_size=max(vma_size, pe_seg->VirtualAddress+pe_seg->Misc.VirtualSize);
383         pe_seg++;
384     }
385     return vma_size;
386 }
387
388 static void do_relocations( unsigned int load_addr, IMAGE_BASE_RELOCATION *r )
389 {
390     int delta = load_addr - PE_HEADER(load_addr)->OptionalHeader.ImageBase;
391     int    hdelta = (delta >> 16) & 0xFFFF;
392     int    ldelta = delta & 0xFFFF;
393
394     if(delta == 0)
395         
396         return;
397     while(r->VirtualAddress)
398     {
399         char *page = (char*) RVA(r->VirtualAddress);
400         int count = (r->SizeOfBlock - 8)/2;
401         int i;
402         TRACE_(fixup)("%x relocations for page %lx\n",
403             count, r->VirtualAddress);
404         
405         for(i=0;i<count;i++)
406         {
407             int offset = r->TypeOffset[i] & 0xFFF;
408             int type = r->TypeOffset[i] >> 12;
409 //            TRACE_(fixup)("patching %x type %x\n", offset, type);
410             switch(type)
411             {
412             case IMAGE_REL_BASED_ABSOLUTE: break;
413             case IMAGE_REL_BASED_HIGH:
414                 *(short*)(page+offset) += hdelta;
415                 break;
416             case IMAGE_REL_BASED_LOW:
417                 *(short*)(page+offset) += ldelta;
418                 break;
419             case IMAGE_REL_BASED_HIGHLOW:
420                 *(int*)(page+offset) += delta;
421                 
422                 break;
423             case IMAGE_REL_BASED_HIGHADJ:
424                 FIXME("Don't know what to do with IMAGE_REL_BASED_HIGHADJ\n");
425                 break;
426             case IMAGE_REL_BASED_MIPS_JMPADDR:
427                 FIXME("Is this a MIPS machine ???\n");
428                 break;
429             default:
430                 FIXME("Unknown fixup type\n");
431                 break;
432             }
433         }
434         r = (IMAGE_BASE_RELOCATION*)((char*)r + r->SizeOfBlock);
435     }
436 }
437         
438
439     
440     
441
442 /**********************************************************************
443  *            PE_LoadImage
444  * Load one PE format DLL/EXE into memory
445  *
446  * Unluckily we can't just mmap the sections where we want them, for
447  * (at least) Linux does only support offsets which are page-aligned.
448  *
449  * BUT we have to map the whole image anyway, for Win32 programs sometimes
450  * want to access them. (HMODULE32 point to the start of it)
451  */
452 HMODULE PE_LoadImage( int handle, LPCSTR filename, WORD *version )
453 {
454     HMODULE    hModule;
455     HANDLE    mapping;
456
457     IMAGE_NT_HEADERS *nt;
458     IMAGE_SECTION_HEADER *pe_sec;
459     IMAGE_DATA_DIRECTORY *dir;
460     BY_HANDLE_FILE_INFORMATION bhfi;
461     int    i, rawsize, lowest_va, vma_size, file_size = 0;
462     DWORD load_addr = 0, aoep, reloc = 0;
463 //    struct get_read_fd_request *req = get_req_buffer();
464     int unix_handle = handle;
465     int page_size = getpagesize();
466
467  
468 //    if ( GetFileInformationByHandle( hFile, &bhfi ) )
469 //        file_size = bhfi.nFileSizeLow;
470     file_size=lseek(handle, 0, SEEK_END);
471     lseek(handle, 0, SEEK_SET);
472
473 //#warning fix CreateFileMappingA
474     mapping = CreateFileMappingA( handle, NULL, PAGE_READONLY | SEC_COMMIT,
475                                     0, 0, NULL );
476     if (!mapping)
477     {
478         WARN("CreateFileMapping error %ld\n", GetLastError() );
479         return 0;
480     }
481 //    hModule = (HMODULE)MapViewOfFile( mapping, FILE_MAP_READ, 0, 0, 0 );
482     hModule=(HMODULE)mapping;
483 //    CloseHandle( mapping );
484     if (!hModule)
485     {
486         WARN("MapViewOfFile error %ld\n", GetLastError() );
487         return 0;
488     }
489     if ( *(WORD*)hModule !=IMAGE_DOS_SIGNATURE)
490     {
491         WARN("%s image doesn't have DOS signature, but 0x%04x\n", filename,*(WORD*)hModule);
492         goto error;
493     }
494
495     nt = PE_HEADER( hModule );
496
497  
498     if ( nt->Signature != IMAGE_NT_SIGNATURE )
499     {
500         WARN("%s image doesn't have PE signature, but 0x%08lx\n", filename, nt->Signature );
501         goto error;
502     }
503
504  
505     if ( nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386 )
506     {
507         MESSAGE("Trying to load PE image for unsupported architecture (");
508         switch (nt->FileHeader.Machine)
509         {
510         case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
511         case IMAGE_FILE_MACHINE_I860:    MESSAGE("I860"); break;
512         case IMAGE_FILE_MACHINE_R3000:   MESSAGE("R3000"); break;
513         case IMAGE_FILE_MACHINE_R4000:   MESSAGE("R4000"); break;
514         case IMAGE_FILE_MACHINE_R10000:  MESSAGE("R10000"); break;
515         case IMAGE_FILE_MACHINE_ALPHA:   MESSAGE("Alpha"); break;
516         case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
517         default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
518         }
519         MESSAGE(")\n");
520         goto error;
521     }
522
523  
524     pe_sec = PE_SECTIONS( hModule );
525     rawsize = 0; lowest_va = 0x10000;
526     for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
527     {
528         if (lowest_va > pe_sec[i].VirtualAddress)
529            lowest_va = pe_sec[i].VirtualAddress;
530         if (pe_sec[i].Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
531         continue;
532     if (pe_sec[i].PointerToRawData+pe_sec[i].SizeOfRawData > rawsize)
533         rawsize = pe_sec[i].PointerToRawData+pe_sec[i].SizeOfRawData;
534     }
535  
536  
537     if ( file_size && file_size < rawsize )
538     {
539         ERR("PE module is too small (header: %d, filesize: %d), "
540                     "probably truncated download?\n",
541                     rawsize, file_size );
542         goto error;
543     }
544
545  
546     aoep = nt->OptionalHeader.AddressOfEntryPoint;
547     if (aoep && (aoep < lowest_va))
548         FIXME("VIRUS WARNING: '%s' has an invalid entrypoint (0x%08lx) "
549                       "below the first virtual address (0x%08x) "
550                       "(possibly infected by Tchernobyl/SpaceFiller virus)!\n",
551                        filename, aoep, lowest_va );
552
553
554     /* FIXME:  Hack!  While we don't really support shared sections yet,
555      *         this checks for those special cases where the whole DLL
556      *         consists only of shared sections and is mapped into the
557      *         shared address space > 2GB.  In this case, we assume that
558      *         the module got mapped at its base address. Thus we simply
559      *         check whether the module has actually been mapped there
560      *         and use it, if so.  This is needed to get Win95 USER32.DLL
561      *         to work (until we support shared sections properly).
562      */
563
564     if ( nt->OptionalHeader.ImageBase & 0x80000000 )
565     {
566         HMODULE sharedMod = (HMODULE)nt->OptionalHeader.ImageBase;
567         IMAGE_NT_HEADERS *sharedNt = (PIMAGE_NT_HEADERS)
568                ( (LPBYTE)sharedMod + ((LPBYTE)nt - (LPBYTE)hModule) );
569
570         /* Well, this check is not really comprehensive,
571            but should be good enough for now ... */
572         if (    !IsBadReadPtr( (LPBYTE)sharedMod, sizeof(IMAGE_DOS_HEADER) )
573              && memcmp( (LPBYTE)sharedMod, (LPBYTE)hModule, sizeof(IMAGE_DOS_HEADER) ) == 0
574              && !IsBadReadPtr( sharedNt, sizeof(IMAGE_NT_HEADERS) )
575              && memcmp( sharedNt, nt, sizeof(IMAGE_NT_HEADERS) ) == 0 )
576         {
577             UnmapViewOfFile( (LPVOID)hModule );
578             return sharedMod;
579         }
580     }
581
582
583  
584     load_addr = nt->OptionalHeader.ImageBase;
585     vma_size = calc_vma_size( hModule );
586
587     load_addr = (DWORD)VirtualAlloc( (void*)load_addr, vma_size,
588                                      MEM_RESERVE | MEM_COMMIT,
589                                      PAGE_EXECUTE_READWRITE );
590     if (load_addr == 0)
591     {
592  
593         FIXME("We need to perform base relocations for %s\n", filename);
594     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_BASERELOC;
595         if (dir->Size)
596             reloc = dir->VirtualAddress;
597         else
598         {
599             FIXME( "FATAL: Need to relocate %s, but no relocation records present (%s). Try to run that file directly !\n",
600                    filename,
601                    (nt->FileHeader.Characteristics&IMAGE_FILE_RELOCS_STRIPPED)?
602                    "stripped during link" : "unknown reason" );
603             goto error;
604         }
605
606         /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
607          *        really make sure that the *new* base address is also > 2GB.
608          *        Some DLLs really check the MSB of the module handle :-/
609          */
610         if ( nt->OptionalHeader.ImageBase & 0x80000000 )
611             ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
612
613         load_addr = (DWORD)VirtualAlloc( NULL, vma_size,
614                      MEM_RESERVE | MEM_COMMIT,
615                      PAGE_EXECUTE_READWRITE );
616     if (!load_addr) {
617             FIXME_(win32)(
618                    "FATAL: Couldn't load module %s (out of memory, %d needed)!\n", filename, vma_size);
619             goto error;
620     }
621     }
622
623     TRACE("Load addr is %lx (base %lx), range %x\n",
624           load_addr, nt->OptionalHeader.ImageBase, vma_size );
625     TRACE_(segment)("Loading %s at %lx, range %x\n",
626                     filename, load_addr, vma_size );
627
628 #if 0
629  
630     *(PIMAGE_DOS_HEADER)load_addr = *(PIMAGE_DOS_HEADER)hModule;
631     *PE_HEADER( load_addr ) = *nt;
632     memcpy( PE_SECTIONS(load_addr), PE_SECTIONS(hModule),
633             sizeof(IMAGE_SECTION_HEADER) * nt->FileHeader.NumberOfSections );
634
635  
636     memcpy( load_addr, hModule, lowest_fa );
637 #endif
638
639     if ((void*)FILE_dommap( handle, (void *)load_addr, 0, nt->OptionalHeader.SizeOfHeaders,
640                      0, 0, PROT_EXEC | PROT_WRITE | PROT_READ,
641                      MAP_PRIVATE | MAP_FIXED ) != (void*)load_addr)
642     {
643         ERR_(win32)( "Critical Error: failed to map PE header to necessary address.\n");    
644         goto error;
645     }
646
647  
648     pe_sec = PE_SECTIONS( hModule );
649     for (i = 0; i < nt->FileHeader.NumberOfSections; i++, pe_sec++)
650     {
651         if (!pe_sec->SizeOfRawData || !pe_sec->PointerToRawData) continue;
652         TRACE("%s: mmaping section %s at %p off %lx size %lx/%lx\n",
653               filename, pe_sec->Name, (void*)RVA(pe_sec->VirtualAddress),
654               pe_sec->PointerToRawData, pe_sec->SizeOfRawData, pe_sec->Misc.VirtualSize );
655         if ((void*)FILE_dommap( unix_handle, (void*)RVA(pe_sec->VirtualAddress),
656                          0, pe_sec->SizeOfRawData, 0, pe_sec->PointerToRawData,
657                          PROT_EXEC | PROT_WRITE | PROT_READ,
658                          MAP_PRIVATE | MAP_FIXED ) != (void*)RVA(pe_sec->VirtualAddress))
659         {
660  
661             ERR_(win32)( "Critical Error: failed to map PE section to necessary address.\n");
662             goto error;
663         }
664         if ((pe_sec->SizeOfRawData < pe_sec->Misc.VirtualSize) &&
665             (pe_sec->SizeOfRawData & (page_size-1)))
666         {
667             DWORD end = (pe_sec->SizeOfRawData & ~(page_size-1)) + page_size;
668             if (end > pe_sec->Misc.VirtualSize) end = pe_sec->Misc.VirtualSize;
669             TRACE("clearing %p - %p\n",
670                   RVA(pe_sec->VirtualAddress) + pe_sec->SizeOfRawData,
671                   RVA(pe_sec->VirtualAddress) + end );
672             memset( (char*)RVA(pe_sec->VirtualAddress) + pe_sec->SizeOfRawData, 0,
673                     end - pe_sec->SizeOfRawData );
674         }
675     }
676
677  
678     if ( reloc )
679         do_relocations( load_addr, (IMAGE_BASE_RELOCATION *)RVA(reloc) );
680
681  
682     *version =   ( (nt->OptionalHeader.MajorSubsystemVersion & 0xff) << 8 )
683                |   (nt->OptionalHeader.MinorSubsystemVersion & 0xff);
684
685  
686     UnmapViewOfFile( (LPVOID)hModule );
687     return (HMODULE)load_addr;
688
689 error:
690     if (unix_handle != -1) close( unix_handle );
691     if (load_addr)
692     VirtualFree( (LPVOID)load_addr, 0, MEM_RELEASE );
693     UnmapViewOfFile( (LPVOID)hModule );
694     return 0;
695 }
696
697 /**********************************************************************
698  *                 PE_CreateModule
699  *
700  * Create WINE_MODREF structure for loaded HMODULE32, link it into
701  * process modref_list, and fixup all imports.
702  *
703  * Note: hModule must point to a correctly allocated PE image,
704  *       with base relocations applied; the 16-bit dummy module
705  *       associated to hModule must already exist.
706  *
707  * Note: This routine must always be called in the context of the
708  *       process that is to own the module to be created.
709  */
710 WINE_MODREF *PE_CreateModule( HMODULE hModule,
711                               LPCSTR filename, DWORD flags, WIN_BOOL builtin )
712 {
713     DWORD load_addr = (DWORD)hModule;
714     IMAGE_NT_HEADERS *nt = PE_HEADER(hModule);
715     IMAGE_DATA_DIRECTORY *dir;
716     IMAGE_IMPORT_DESCRIPTOR *pe_import = NULL;
717     IMAGE_EXPORT_DIRECTORY *pe_export = NULL;
718     IMAGE_RESOURCE_DIRECTORY *pe_resource = NULL;
719     WINE_MODREF *wm;
720     int    result;
721
722
723  
724
725     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_EXPORT;
726     if (dir->Size)
727         pe_export = (PIMAGE_EXPORT_DIRECTORY)RVA(dir->VirtualAddress);
728
729     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_IMPORT;
730     if (dir->Size)
731         pe_import = (PIMAGE_IMPORT_DESCRIPTOR)RVA(dir->VirtualAddress);
732
733     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_RESOURCE;
734     if (dir->Size)
735         pe_resource = (PIMAGE_RESOURCE_DIRECTORY)RVA(dir->VirtualAddress);
736
737     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_EXCEPTION;
738     if (dir->Size) FIXME("Exception directory ignored\n" );
739
740     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_SECURITY;
741     if (dir->Size) FIXME("Security directory ignored\n" );
742
743  
744  
745
746     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_DEBUG;
747     if (dir->Size) TRACE("Debug directory ignored\n" );
748
749     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_COPYRIGHT;
750     if (dir->Size) FIXME("Copyright string ignored\n" );
751
752     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_GLOBALPTR;
753     if (dir->Size) FIXME("Global Pointer (MIPS) ignored\n" );
754
755  
756
757     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG;
758     if (dir->Size) FIXME("Load Configuration directory ignored\n" );
759
760     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT;
761     if (dir->Size) TRACE("Bound Import directory ignored\n" );
762
763     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_IAT;
764     if (dir->Size) TRACE("Import Address Table directory ignored\n" );
765
766     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT;
767     if (dir->Size)
768     {
769         TRACE("Delayed import, stub calls LoadLibrary\n" );
770         /*
771          * Nothing to do here.
772          */
773
774 #ifdef ImgDelayDescr
775         /*
776          * This code is useful to observe what the heck is going on.
777          */
778         {
779         ImgDelayDescr *pe_delay = NULL;
780         pe_delay = (PImgDelayDescr)RVA(dir->VirtualAddress);
781         TRACE_(delayhlp)("pe_delay->grAttrs = %08x\n", pe_delay->grAttrs);
782         TRACE_(delayhlp)("pe_delay->szName = %s\n", pe_delay->szName);
783         TRACE_(delayhlp)("pe_delay->phmod = %08x\n", pe_delay->phmod);
784         TRACE_(delayhlp)("pe_delay->pIAT = %08x\n", pe_delay->pIAT);
785         TRACE_(delayhlp)("pe_delay->pINT = %08x\n", pe_delay->pINT);
786         TRACE_(delayhlp)("pe_delay->pBoundIAT = %08x\n", pe_delay->pBoundIAT);
787         TRACE_(delayhlp)("pe_delay->pUnloadIAT = %08x\n", pe_delay->pUnloadIAT);
788         TRACE_(delayhlp)("pe_delay->dwTimeStamp = %08x\n", pe_delay->dwTimeStamp);
789         }
790 #endif
791     }
792
793     dir = nt->OptionalHeader.DataDirectory+IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR;
794     if (dir->Size) FIXME("Unknown directory 14 ignored\n" );
795
796     dir = nt->OptionalHeader.DataDirectory+15;
797     if (dir->Size) FIXME("Unknown directory 15 ignored\n" );
798
799
800  
801
802     wm = (WINE_MODREF *)HeapAlloc( GetProcessHeap(),
803                                    HEAP_ZERO_MEMORY, sizeof(*wm) );
804     wm->module = hModule;
805
806     if ( builtin )
807         wm->flags |= WINE_MODREF_INTERNAL;
808     if ( flags & DONT_RESOLVE_DLL_REFERENCES )
809         wm->flags |= WINE_MODREF_DONT_RESOLVE_REFS;
810     if ( flags & LOAD_LIBRARY_AS_DATAFILE )
811         wm->flags |= WINE_MODREF_LOAD_AS_DATAFILE;
812
813     wm->type = MODULE32_PE;
814     wm->binfmt.pe.pe_export = pe_export;
815     wm->binfmt.pe.pe_import = pe_import;
816     wm->binfmt.pe.pe_resource = pe_resource;
817     wm->binfmt.pe.tlsindex = -1;
818
819     wm->filename = malloc(strlen(filename)+1);
820     strcpy(wm->filename, filename );
821     wm->modname = strrchr( wm->filename, '\\' );
822     if (!wm->modname) wm->modname = wm->filename;
823     else wm->modname++;
824
825     if ( pe_export )
826         dump_exports( hModule );
827
828     /* Fixup Imports */
829
830     if (    pe_import
831          && !( wm->flags & WINE_MODREF_LOAD_AS_DATAFILE )
832          && !( wm->flags & WINE_MODREF_DONT_RESOLVE_REFS )
833          && fixup_imports( wm ) )
834     {
835         /* remove entry from modref chain */
836          return NULL;
837     }
838
839     return wm;
840
841     return wm;
842 }
843
844 /******************************************************************************
845  * The PE Library Loader frontend.
846  * FIXME: handle the flags.
847  */
848 WINE_MODREF *PE_LoadLibraryExA (LPCSTR name, DWORD flags)
849 {
850     HMODULE        hModule32;
851     WINE_MODREF    *wm;
852     char            filename[256];
853     int hFile;
854     WORD        version = 0;
855
856     
857     strncpy(filename, name, sizeof(filename));
858     hFile=open(filename, O_RDONLY);
859     if(hFile==-1)
860         return NULL;
861     
862     
863     hModule32 = PE_LoadImage( hFile, filename, &version );
864     if (!hModule32)
865     {
866         SetLastError( ERROR_OUTOFMEMORY );    
867         return NULL;
868     }
869
870     if ( !(wm = PE_CreateModule( hModule32, filename, flags, FALSE )) )
871     {
872         ERR( "can't load %s\n", filename );
873         SetLastError( ERROR_OUTOFMEMORY );
874         return NULL;
875     }
876     close(hFile);
877     //printf("^^^^^^^^^^^^^^^^Alloc VM1  %p\n", wm);
878     return wm;
879 }
880
881
882 /*****************************************************************************
883  *    PE_UnloadLibrary
884  *
885  * Unload the library unmapping the image and freeing the modref structure.
886  */
887 void PE_UnloadLibrary(WINE_MODREF *wm)
888 {
889     TRACE(" unloading %s\n", wm->filename);
890
891     if (wm->filename)
892     free(wm->filename);
893     if (wm->short_filename)
894     free(wm->short_filename);
895     HeapFree( GetProcessHeap(), 0, wm->deps );
896     VirtualFree( (LPVOID)wm->module, 0, MEM_RELEASE );
897     HeapFree( GetProcessHeap(), 0, wm );
898     //printf("^^^^^^^^^^^^^^^^Free VM1  %p\n", wm);
899 }
900
901 /*****************************************************************************
902  * Load the PE main .EXE. All other loading is done by PE_LoadLibraryExA
903  * FIXME: this function should use PE_LoadLibraryExA, but currently can't
904  * due to the PROCESS_Create stuff.
905  */
906
907
908 /*
909  * This is a dirty hack.
910  * The win32 DLLs contain an alloca routine, that first probes the soon
911  * to be allocated new memory *below* the current stack pointer in 4KByte
912  * increments.  After the mem probing below the current %esp,  the stack
913  * pointer is finally decremented to make room for the "alloca"ed memory.
914  * Maybe the probing code is intended to extend the stack on a windows box.
915  * Anyway, the linux kernel does *not* extend the stack by simply accessing
916  * memory below %esp;  it segfaults.
917  * The extend_stack_for_dll_alloca() routine just preallocates a big chunk
918  * of memory on the stack, for use by the DLLs alloca routine.
919  * Added the noinline attribute as e.g. gcc 3.2.2 inlines this function
920  * in a way that breaks it.
921  */
922 static void __attribute__((noinline)) extend_stack_for_dll_alloca(void)
923 {
924 #if !defined(__FreeBSD__) && !defined(__DragonFly__)
925     volatile int* mem=alloca(0x20000);
926     *mem=0x1234;
927 #endif
928 }
929
930 /* Called if the library is loaded or freed.
931  * NOTE: if a thread attaches a DLL, the current thread will only do
932  * DLL_PROCESS_ATTACH. Only new created threads do DLL_THREAD_ATTACH
933  * (SDK)
934  */
935 WIN_BOOL PE_InitDLL( WINE_MODREF *wm, DWORD type, LPVOID lpReserved )
936 {
937     WIN_BOOL retv = TRUE;
938     assert( wm->type == MODULE32_PE );
939
940  
941     if ((PE_HEADER(wm->module)->FileHeader.Characteristics & IMAGE_FILE_DLL) &&
942         (PE_HEADER(wm->module)->OptionalHeader.AddressOfEntryPoint)
943     ) {
944     DLLENTRYPROC entry ;
945     entry = (void*)PE_FindExportedFunction(wm, "DllMain", 0);
946     if(entry==NULL)
947         entry = (void*)RVA_PTR( wm->module,OptionalHeader.AddressOfEntryPoint );
948  
949     TRACE_(relay)("CallTo32(entryproc=%p,module=%08x,type=%ld,res=%p)\n",
950                        entry, wm->module, type, lpReserved );
951     
952     
953     TRACE("Entering DllMain(");
954     switch(type)
955     {
956         case DLL_PROCESS_DETACH:
957             TRACE("DLL_PROCESS_DETACH) ");
958         break;
959         case DLL_PROCESS_ATTACH:
960             TRACE("DLL_PROCESS_ATTACH) ");
961         break;
962         case DLL_THREAD_DETACH:
963             TRACE("DLL_THREAD_DETACH) ");
964         break;
965         case DLL_THREAD_ATTACH:
966             TRACE("DLL_THREAD_ATTACH) ");
967         break;
968     }    
969     TRACE("for %s\n", wm->filename);
970     extend_stack_for_dll_alloca();
971         retv = entry( wm->module, type, lpReserved );
972     }
973
974     return retv;
975 }
976
977 static LPVOID
978 _fixup_address(PIMAGE_OPTIONAL_HEADER opt,int delta,LPVOID addr) {
979     if (    ((DWORD)addr>opt->ImageBase) &&
980         ((DWORD)addr<opt->ImageBase+opt->SizeOfImage)
981     )
982         
983         return (LPVOID)(((DWORD)addr)+delta);
984     else
985         
986         return addr;
987 }