2 * Win32 virtual memory functions
4 * Copyright 1997 Alexandre Julliard
13 #include <sys/types.h>
41 struct _FV *next; /* Next view */
42 struct _FV *prev; /* Prev view */
43 UINT32 base; /* Base address */
44 UINT32 size; /* Size in bytes */
45 UINT32 flags; /* Allocation flags */
46 UINT32 offset; /* Offset from start of mapped file */
47 FILE_MAPPING *mapping; /* File mapping */
48 BYTE protect; /* Protection for all pages at allocation time */
49 BYTE prot[1]; /* Protection byte for each page */
52 /* Per-page protection byte values */
53 #define VPROT_READ 0x01
54 #define VPROT_WRITE 0x02
55 #define VPROT_EXEC 0x04
56 #define VPROT_WRITECOPY 0x08
57 #define VPROT_GUARD 0x10
58 #define VPROT_NOCACHE 0x20
59 #define VPROT_COMMITTED 0x40
62 #define VFLAG_SYSTEM 0x01
64 /* Conversion from VPROT_* to Win32 flags */
65 static const BYTE VIRTUAL_Win32Flags[16] =
67 PAGE_NOACCESS, /* 0 */
68 PAGE_READONLY, /* READ */
69 PAGE_READWRITE, /* WRITE */
70 PAGE_READWRITE, /* READ | WRITE */
71 PAGE_EXECUTE, /* EXEC */
72 PAGE_EXECUTE_READ, /* READ | EXEC */
73 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
74 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
75 PAGE_WRITECOPY, /* WRITECOPY */
76 PAGE_WRITECOPY, /* READ | WRITECOPY */
77 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
78 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
79 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
80 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
81 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
82 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
86 static FILE_VIEW *VIRTUAL_FirstView;
88 static UINT32 page_shift;
89 static UINT32 page_mask;
90 static UINT32 granularity_mask; /* Allocation granularity (usually 64k) */
92 #define ROUND_ADDR(addr) \
93 ((UINT32)(addr) & ~page_mask)
95 #define ROUND_SIZE(addr,size) \
96 (((UINT32)(size) + ((UINT32)(addr) & page_mask) + page_mask) & ~page_mask)
98 static void VIRTUAL_DestroyMapping( K32OBJ *obj );
100 const K32OBJ_OPS MEM_MAPPED_FILE_Ops =
102 /* Object cannot be waited upon, so we don't need these (except destroy) */
104 NULL, /* satisfied */
106 NULL, /* remove_wait */
107 VIRTUAL_DestroyMapping /* destroy */
110 /***********************************************************************
113 static const char *VIRTUAL_GetProtStr( BYTE prot )
115 static char buffer[6];
116 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
117 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
118 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
119 buffer[3] = (prot & VPROT_WRITE) ?
120 ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
121 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
127 /***********************************************************************
130 static void VIRTUAL_DumpView( FILE_VIEW *view )
133 UINT32 addr = view->base;
134 BYTE prot = view->prot[0];
136 dprintf_virtual( stddeb, "View: %08x - %08x%s",
137 view->base, view->base + view->size - 1,
138 (view->flags & VFLAG_SYSTEM) ? " (system)" : "" );
139 if (view->mapping && view->mapping->file)
140 dprintf_virtual( stddeb, " %s @ %08x\n",
141 view->mapping->file->unix_name, view->offset );
143 dprintf_virtual( stddeb, " (anonymous)\n");
145 for (count = i = 1; i < view->size >> page_shift; i++, count++)
147 if (view->prot[i] == prot) continue;
148 dprintf_virtual( stddeb, " %08x - %08x %s\n",
149 addr, addr + (count << page_shift) - 1,
150 VIRTUAL_GetProtStr(prot) );
151 addr += (count << page_shift);
152 prot = view->prot[i];
156 dprintf_virtual( stddeb, " %08x - %08x %s\n",
157 addr, addr + (count << page_shift) - 1,
158 VIRTUAL_GetProtStr(prot) );
162 /***********************************************************************
165 void VIRTUAL_Dump(void)
167 FILE_VIEW *view = VIRTUAL_FirstView;
168 dprintf_virtual( stddeb, "\nDump of all virtual memory views:\n\n" );
171 VIRTUAL_DumpView( view );
177 /***********************************************************************
180 * Find the view containing a given address.
182 static FILE_VIEW *VIRTUAL_FindView( UINT32 addr )
184 FILE_VIEW *view = VIRTUAL_FirstView;
187 if (view->base > addr) return NULL;
188 if (view->base + view->size > addr) return view;
195 /***********************************************************************
198 * Create a new view and add it in the linked list.
200 static FILE_VIEW *VIRTUAL_CreateView( UINT32 base, UINT32 size, UINT32 offset,
201 UINT32 flags, BYTE vprot,
202 FILE_MAPPING *mapping )
204 FILE_VIEW *view, *prev;
206 /* Create the view structure */
208 assert( !(base & page_mask) );
209 assert( !(size & page_mask) );
211 if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
213 view->size = size << page_shift;
215 view->offset = offset;
216 view->mapping = mapping;
217 view->protect = vprot;
218 memset( view->prot, vprot, size );
220 /* Insert it in the linked list */
222 if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
224 view->next = VIRTUAL_FirstView;
226 if (view->next) view->next->prev = view;
227 VIRTUAL_FirstView = view;
231 prev = VIRTUAL_FirstView;
232 while (prev->next && (prev->next->base < base)) prev = prev->next;
233 view->next = prev->next;
235 if (view->next) view->next->prev = view;
238 if (debugging_virtual) VIRTUAL_DumpView( view );
243 /***********************************************************************
248 static void VIRTUAL_DeleteView( FILE_VIEW *view )
250 FILE_munmap( (void *)view->base, 0, view->size );
251 if (view->next) view->next->prev = view->prev;
252 if (view->prev) view->prev->next = view->next;
253 else VIRTUAL_FirstView = view->next;
254 if (view->mapping) K32OBJ_DecCount( &view->mapping->header );
259 /***********************************************************************
260 * VIRTUAL_GetUnixProt
262 * Convert page protections to protection for mmap/mprotect.
264 static int VIRTUAL_GetUnixProt( BYTE vprot )
267 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
269 if (vprot & VPROT_READ) prot |= PROT_READ;
270 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
271 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
277 /***********************************************************************
278 * VIRTUAL_GetWin32Prot
280 * Convert page protections to Win32 flags.
282 static void VIRTUAL_GetWin32Prot( BYTE vprot, DWORD *protect, DWORD *state )
284 *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
285 if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;
286 if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
288 if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
292 /***********************************************************************
295 * Build page protections from Win32 flags.
297 static BYTE VIRTUAL_GetProt( DWORD protect )
301 switch(protect & 0xff)
307 vprot = VPROT_READ | VPROT_WRITE;
310 vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
315 case PAGE_EXECUTE_READ:
316 vprot = VPROT_EXEC | VPROT_READ;
318 case PAGE_EXECUTE_READWRITE:
319 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
321 case PAGE_EXECUTE_WRITECOPY:
322 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
329 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
330 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
335 /***********************************************************************
338 * Change the protection of a range of pages.
340 static BOOL32 VIRTUAL_SetProt( FILE_VIEW *view, UINT32 base,
341 UINT32 size, BYTE vprot )
343 dprintf_virtual( stddeb, "VIRTUAL_SetProt: %08x-%08x %s\n",
344 base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
346 if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
347 return FALSE; /* FIXME: last error */
349 memset( view->prot + ((base - view->base) >> page_shift),
350 vprot, size >> page_shift );
351 if (debugging_virtual) VIRTUAL_DumpView( view );
356 /***********************************************************************
359 * Check that all pages in a range have the given flags.
361 static BOOL32 VIRTUAL_CheckFlags( UINT32 base, UINT32 size, BYTE flags )
366 if (!size) return TRUE;
367 if (!(view = VIRTUAL_FindView( base ))) return FALSE;
368 if (view->base + view->size < base + size) return FALSE;
369 page = (base - view->base) >> page_shift;
370 size = ROUND_SIZE( base, size ) >> page_shift;
371 while (size--) if ((view->prot[page++] & flags) != flags) return FALSE;
376 /***********************************************************************
379 BOOL32 VIRTUAL_Init(void)
382 GetSystemInfo( &sysinfo );
384 page_mask = sysinfo.dwPageSize - 1;
385 granularity_mask = sysinfo.dwAllocationGranularity - 1;
386 /* Make sure we have a power of 2 */
387 assert( !(sysinfo.dwPageSize & page_mask) );
388 assert( !(sysinfo.dwAllocationGranularity & granularity_mask) );
390 while ((1 << page_shift) != sysinfo.dwPageSize) page_shift++;
394 /* Do not use stdio here since it may temporarily change the size
395 * of some segments (ie libc6 adds 0x1000 per open FILE)
397 int fd = open ("/proc/self/maps", O_RDONLY);
404 int start, end, offset;
406 BYTE vprot = VPROT_COMMITTED;
409 int count = sizeof(buffer);
410 while (1 == read(fd, ptr, 1) && *ptr != '\n' && --count > 0)
413 if (*ptr != '\n') break;
416 sscanf( buffer, "%x-%x %c%c%c%c %x",
417 &start, &end, &r, &w, &x, &p, &offset );
418 if (r == 'r') vprot |= VPROT_READ;
419 if (w == 'w') vprot |= VPROT_WRITE;
420 if (x == 'x') vprot |= VPROT_EXEC;
421 if (p == 'p') vprot |= VPROT_WRITECOPY;
422 VIRTUAL_CreateView( start, end - start, 0,
423 VFLAG_SYSTEM, vprot, NULL );
433 /***********************************************************************
434 * VirtualAlloc (KERNEL32.548)
436 LPVOID WINAPI VirtualAlloc( LPVOID addr, DWORD size, DWORD type, DWORD protect)
439 UINT32 base, ptr, view_size;
442 dprintf_virtual( stddeb, "VirtualAlloc: %08x %08lx %lx %08lx\n",
443 (UINT32)addr, size, type, protect );
445 /* Round parameters to a page boundary */
447 if (size > 0x7fc00000) /* 2Gb - 4Mb */
449 SetLastError( ERROR_OUTOFMEMORY );
454 if (type & MEM_RESERVE) /* Round down to 64k boundary */
455 base = ((UINT32)addr + granularity_mask) & ~granularity_mask;
457 base = ROUND_ADDR( addr );
458 size = (((UINT32)addr + size + page_mask) & ~page_mask) - base;
459 if (base + size < base) /* Disallow wrap-around */
461 SetLastError( ERROR_INVALID_PARAMETER );
468 size = (size + page_mask) & ~page_mask;
471 /* Compute the protection flags */
473 if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
474 (type & ~(MEM_COMMIT | MEM_RESERVE)))
476 SetLastError( ERROR_INVALID_PARAMETER );
479 if (type & MEM_COMMIT)
480 vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
483 /* Reserve the memory */
485 if ((type & MEM_RESERVE) || !base)
487 view_size = size + (base ? 0 : granularity_mask + 1);
488 ptr = (UINT32)FILE_dommap( NULL, (LPVOID)base, 0, view_size, 0, 0,
489 VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE );
490 if (ptr == (UINT32)-1)
492 SetLastError( ERROR_OUTOFMEMORY );
497 /* Release the extra memory while keeping the range */
498 /* starting on a 64k boundary. */
500 if (ptr & granularity_mask)
502 UINT32 extra = granularity_mask + 1 - (ptr & granularity_mask);
503 FILE_munmap( (void *)ptr, 0, extra );
507 if (view_size > size)
508 FILE_munmap( (void *)(ptr + size), 0, view_size - size );
510 else if (ptr != base)
512 /* We couldn't get the address we wanted */
513 FILE_munmap( (void *)ptr, 0, view_size );
514 SetLastError( ERROR_INVALID_ADDRESS );
517 if (!(view = VIRTUAL_CreateView( ptr, size, 0, 0, vprot, NULL )))
519 FILE_munmap( (void *)ptr, 0, size );
520 SetLastError( ERROR_OUTOFMEMORY );
523 if (debugging_virtual) VIRTUAL_DumpView( view );
527 /* Commit the pages */
529 if (!(view = VIRTUAL_FindView( base )) ||
530 (base + size > view->base + view->size))
532 SetLastError( ERROR_INVALID_PARAMETER );
536 if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
541 /***********************************************************************
542 * VirtualFree (KERNEL32.550)
544 BOOL32 WINAPI VirtualFree( LPVOID addr, DWORD size, DWORD type )
549 dprintf_virtual( stddeb, "VirtualFree: %08x %08lx %lx\n",
550 (UINT32)addr, size, type );
552 /* Fix the parameters */
554 size = ROUND_SIZE( addr, size );
555 base = ROUND_ADDR( addr );
557 if (!(view = VIRTUAL_FindView( base )) ||
558 (base + size > view->base + view->size))
560 SetLastError( ERROR_INVALID_PARAMETER );
564 /* Compute the protection flags */
566 if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
568 SetLastError( ERROR_INVALID_PARAMETER );
574 if (type == MEM_RELEASE)
576 if (size || (base != view->base))
578 SetLastError( ERROR_INVALID_PARAMETER );
581 VIRTUAL_DeleteView( view );
585 /* Decommit the pages */
587 return VIRTUAL_SetProt( view, base, size, 0 );
591 /***********************************************************************
592 * VirtualLock (KERNEL32.551)
594 BOOL32 WINAPI VirtualLock( LPVOID addr, DWORD size )
600 /***********************************************************************
601 * VirtualUnlock (KERNEL32.556)
603 BOOL32 WINAPI VirtualUnlock( LPVOID addr, DWORD size )
609 /***********************************************************************
610 * VirtualProtect (KERNEL32.552)
612 BOOL32 WINAPI VirtualProtect( LPVOID addr, DWORD size, DWORD new_prot,
619 dprintf_virtual( stddeb, "VirtualProtect: %08x %08lx %08lx\n",
620 (UINT32)addr, size, new_prot );
622 /* Fix the parameters */
624 size = ROUND_SIZE( addr, size );
625 base = ROUND_ADDR( addr );
627 if (!(view = VIRTUAL_FindView( base )) ||
628 (base + size > view->base + view->size))
630 SetLastError( ERROR_INVALID_PARAMETER );
634 /* Make sure all the pages are committed */
636 p = view->prot + ((base - view->base) >> page_shift);
637 for (i = size >> page_shift; i; i--, p++)
639 if (!(*p & VPROT_COMMITTED))
641 SetLastError( ERROR_INVALID_PARAMETER );
646 VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL );
647 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
648 return VIRTUAL_SetProt( view, base, size, vprot );
652 /***********************************************************************
653 * VirtualProtectEx (KERNEL32.553)
655 BOOL32 WINAPI VirtualProtectEx( HANDLE32 handle, LPVOID addr, DWORD size,
656 DWORD new_prot, LPDWORD old_prot )
660 PDB32 *pdb = (PDB32 *)PROCESS_GetObjPtr( handle, K32OBJ_PROCESS );
663 if (pdb == PROCESS_Current())
664 ret = VirtualProtect( addr, size, new_prot, old_prot );
666 fprintf(stderr,"Unsupported: VirtualProtectEx on other process\n");
667 K32OBJ_DecCount( &pdb->header );
673 /***********************************************************************
674 * VirtualQuery (KERNEL32.554)
676 BOOL32 WINAPI VirtualQuery( LPCVOID addr, LPMEMORY_BASIC_INFORMATION info,
679 FILE_VIEW *view = VIRTUAL_FirstView;
680 UINT32 base = ROUND_ADDR( addr );
681 UINT32 alloc_base = 0;
684 /* Find the view containing the address */
690 size = 0xffff0000 - alloc_base;
693 if (view->base > base)
695 size = view->base - alloc_base;
699 if (view->base + view->size > base)
701 alloc_base = view->base;
705 alloc_base = view->base + view->size;
709 /* Fill the info structure */
713 info->State = MEM_FREE;
715 info->AllocationProtect = 0;
720 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
721 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
722 for (size = base - alloc_base; size < view->size; size += page_mask+1)
723 if (view->prot[size >> page_shift] != vprot) break;
724 info->AllocationProtect = view->protect;
725 info->Type = MEM_PRIVATE; /* FIXME */
728 info->BaseAddress = (LPVOID)base;
729 info->AllocationBase = (LPVOID)alloc_base;
730 info->RegionSize = size - (base - alloc_base);
735 /***********************************************************************
736 * VirtualQueryEx (KERNEL32.555)
738 BOOL32 WINAPI VirtualQueryEx( HANDLE32 handle, LPCVOID addr,
739 LPMEMORY_BASIC_INFORMATION info, DWORD len )
743 PDB32 *pdb = (PDB32 *)PROCESS_GetObjPtr( handle, K32OBJ_PROCESS );
746 if (pdb == PROCESS_Current())
747 ret = VirtualQuery( addr, info, len );
749 fprintf(stderr,"Unsupported: VirtualQueryEx on other process\n");
750 K32OBJ_DecCount( &pdb->header );
756 /***********************************************************************
757 * IsBadReadPtr32 (KERNEL32.354)
759 BOOL32 WINAPI IsBadReadPtr32( LPCVOID ptr, UINT32 size )
761 return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
762 VPROT_READ | VPROT_COMMITTED );
766 /***********************************************************************
767 * IsBadWritePtr32 (KERNEL32.357)
769 BOOL32 WINAPI IsBadWritePtr32( LPVOID ptr, UINT32 size )
771 return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
772 VPROT_WRITE | VPROT_COMMITTED );
776 /***********************************************************************
777 * IsBadHugeReadPtr32 (KERNEL32.352)
779 BOOL32 WINAPI IsBadHugeReadPtr32( LPCVOID ptr, UINT32 size )
781 return IsBadReadPtr32( ptr, size );
785 /***********************************************************************
786 * IsBadHugeWritePtr32 (KERNEL32.353)
788 BOOL32 WINAPI IsBadHugeWritePtr32( LPVOID ptr, UINT32 size )
790 return IsBadWritePtr32( ptr, size );
794 /***********************************************************************
795 * IsBadCodePtr32 (KERNEL32.351)
797 BOOL32 WINAPI IsBadCodePtr32( FARPROC32 ptr )
799 return !VIRTUAL_CheckFlags( (UINT32)ptr, 1, VPROT_EXEC | VPROT_COMMITTED );
803 /***********************************************************************
804 * IsBadStringPtr32A (KERNEL32.355)
806 BOOL32 WINAPI IsBadStringPtr32A( LPCSTR str, UINT32 max )
811 if (!max) return FALSE;
812 if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
813 page = ((UINT32)str - view->base) >> page_shift;
814 count = page_mask + 1 - ((UINT32)str & page_mask);
818 if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
819 (VPROT_READ | VPROT_COMMITTED))
821 if (count > max) count = max;
823 while (count--) if (!*str++) return FALSE;
824 if (++page >= view->size >> page_shift) return TRUE;
825 count = page_mask + 1;
831 /***********************************************************************
832 * IsBadStringPtr32W (KERNEL32.356)
834 BOOL32 WINAPI IsBadStringPtr32W( LPCWSTR str, UINT32 max )
839 if (!max) return FALSE;
840 if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
841 page = ((UINT32)str - view->base) >> page_shift;
842 count = (page_mask + 1 - ((UINT32)str & page_mask)) / sizeof(WCHAR);
846 if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
847 (VPROT_READ | VPROT_COMMITTED))
849 if (count > max) count = max;
851 while (count--) if (!*str++) return FALSE;
852 if (++page >= view->size >> page_shift) return TRUE;
853 count = (page_mask + 1) / sizeof(WCHAR);
859 /***********************************************************************
860 * CreateFileMapping32A (KERNEL32.46)
862 HANDLE32 WINAPI CreateFileMapping32A(HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
863 DWORD protect, DWORD size_high,
864 DWORD size_low, LPCSTR name )
866 FILE_MAPPING *mapping = NULL;
870 /* First search for an object with the same name */
872 K32OBJ *obj = K32OBJ_FindName( name );
875 if (obj->type == K32OBJ_MEM_MAPPED_FILE)
877 SetLastError( ERROR_ALREADY_EXISTS );
878 handle = PROCESS_AllocHandle( obj, 0 );
882 SetLastError( ERROR_DUP_NAME );
885 K32OBJ_DecCount( obj );
889 /* Check parameters */
891 dprintf_virtual(stddeb,"CreateFileMapping32A(%x,%p,%08lx,%08lx%08lx,%s)\n",
892 hFile, attr, protect, size_high, size_low, name );
894 vprot = VIRTUAL_GetProt( protect );
895 if (protect & SEC_RESERVE)
897 if (hFile != INVALID_HANDLE_VALUE32)
899 SetLastError( ERROR_INVALID_PARAMETER );
903 else vprot |= VPROT_COMMITTED;
904 if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
906 /* Compute the size and extend the file if necessary */
908 if (hFile == INVALID_HANDLE_VALUE32)
910 if (!size_high && !size_low)
912 SetLastError( ERROR_INVALID_PARAMETER );
917 else /* We have a file */
919 BY_HANDLE_FILE_INFORMATION info;
920 if (!(obj = PROCESS_GetObjPtr( hFile, K32OBJ_FILE ))) goto error;
921 /* FIXME: should check if the file permissions agree
922 * with the required protection flags */
923 if (!GetFileInformationByHandle( hFile, &info )) goto error;
924 if (!size_high && !size_low)
926 size_high = info.nFileSizeHigh;
927 size_low = info.nFileSizeLow;
929 else if ((size_high > info.nFileSizeHigh) ||
930 ((size_high == info.nFileSizeHigh) &&
931 (size_low > info.nFileSizeLow)))
933 /* We have to grow the file */
934 if (SetFilePointer( hFile, size_low, &size_high,
935 FILE_BEGIN ) == 0xffffffff) goto error;
936 if (!SetEndOfFile( hFile )) goto error;
940 /* Allocate the mapping object */
942 if (!(mapping = HeapAlloc( SystemHeap, 0, sizeof(*mapping) ))) goto error;
943 mapping->header.type = K32OBJ_MEM_MAPPED_FILE;
944 mapping->header.refcount = 1;
945 mapping->protect = vprot;
946 mapping->size_high = size_high;
947 mapping->size_low = ROUND_SIZE( 0, size_low );
948 mapping->file = (FILE_OBJECT *)obj;
950 if (!K32OBJ_AddName( &mapping->header, name )) handle = 0;
951 else handle = PROCESS_AllocHandle( &mapping->header, 0 );
952 K32OBJ_DecCount( &mapping->header );
956 if (obj) K32OBJ_DecCount( obj );
957 if (mapping) HeapFree( SystemHeap, 0, mapping );
962 /***********************************************************************
963 * CreateFileMapping32W (KERNEL32.47)
965 HANDLE32 WINAPI CreateFileMapping32W(HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
966 DWORD protect, DWORD size_high,
967 DWORD size_low, LPCWSTR name )
969 LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
970 HANDLE32 ret = CreateFileMapping32A( hFile, attr, protect,
971 size_high, size_low, nameA );
972 HeapFree( GetProcessHeap(), 0, nameA );
977 /***********************************************************************
978 * OpenFileMapping32A (KERNEL32.397)
980 HANDLE32 WINAPI OpenFileMapping32A( DWORD access, BOOL32 inherit, LPCSTR name )
985 if ((obj = K32OBJ_FindNameType( name, K32OBJ_MEM_MAPPED_FILE )))
987 handle = PROCESS_AllocHandle( obj, 0 );
988 K32OBJ_DecCount( obj );
995 /***********************************************************************
996 * OpenFileMapping32W (KERNEL32.398)
998 HANDLE32 WINAPI OpenFileMapping32W( DWORD access, BOOL32 inherit, LPCWSTR name)
1000 LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
1001 HANDLE32 ret = OpenFileMapping32A( access, inherit, nameA );
1002 HeapFree( GetProcessHeap(), 0, nameA );
1007 /***********************************************************************
1008 * VIRTUAL_DestroyMapping
1010 * Destroy a FILE_MAPPING object.
1012 static void VIRTUAL_DestroyMapping( K32OBJ *ptr )
1014 FILE_MAPPING *mapping = (FILE_MAPPING *)ptr;
1015 assert( ptr->type == K32OBJ_MEM_MAPPED_FILE );
1017 if (mapping->file) K32OBJ_DecCount( &mapping->file->header );
1018 ptr->type = K32OBJ_UNKNOWN;
1019 HeapFree( SystemHeap, 0, mapping );
1023 /***********************************************************************
1024 * MapViewOfFile (KERNEL32.385)
1026 LPVOID WINAPI MapViewOfFile( HANDLE32 mapping, DWORD access, DWORD offset_high,
1027 DWORD offset_low, DWORD count )
1029 return MapViewOfFileEx( mapping, access, offset_high,
1030 offset_low, count, NULL );
1034 /***********************************************************************
1035 * MapViewOfFileEx (KERNEL32.386)
1037 LPVOID WINAPI MapViewOfFileEx(HANDLE32 handle, DWORD access, DWORD offset_high,
1038 DWORD offset_low, DWORD count, LPVOID addr )
1040 FILE_MAPPING *mapping;
1042 UINT32 ptr = (UINT32)-1, size = 0;
1043 int flags = MAP_PRIVATE;
1045 /* Check parameters */
1047 if ((offset_low & granularity_mask) ||
1048 (addr && ((UINT32)addr & granularity_mask)))
1050 SetLastError( ERROR_INVALID_PARAMETER );
1054 if (!(mapping = (FILE_MAPPING *)PROCESS_GetObjPtr( handle,
1055 K32OBJ_MEM_MAPPED_FILE )))
1058 if (mapping->size_high || offset_high)
1059 fprintf( stderr, "MapViewOfFileEx: offsets larger than 4Gb not supported\n");
1061 if ((offset_low >= mapping->size_low) ||
1062 (count > mapping->size_low - offset_low))
1064 SetLastError( ERROR_INVALID_PARAMETER );
1067 if (count) size = ROUND_SIZE( offset_low, count );
1068 else size = mapping->size_low - offset_low;
1072 case FILE_MAP_ALL_ACCESS:
1073 case FILE_MAP_WRITE:
1074 case FILE_MAP_WRITE | FILE_MAP_READ:
1075 if (!(mapping->protect & VPROT_WRITE))
1077 SetLastError( ERROR_INVALID_PARAMETER );
1084 case FILE_MAP_COPY | FILE_MAP_READ:
1085 if (mapping->protect & VPROT_READ) break;
1088 SetLastError( ERROR_INVALID_PARAMETER );
1094 dprintf_virtual( stddeb, "MapViewOfFile: handle=%x size=%x offset=%lx\n",
1095 handle, size, offset_low );
1097 ptr = (UINT32)FILE_dommap( mapping->file, addr, 0, size, 0, offset_low,
1098 VIRTUAL_GetUnixProt( mapping->protect ),
1100 if (ptr == (UINT32)-1)
1102 SetLastError( ERROR_OUTOFMEMORY );
1106 if (!(view = VIRTUAL_CreateView( ptr, size, offset_low, 0,
1107 mapping->protect, mapping )))
1109 SetLastError( ERROR_OUTOFMEMORY );
1115 if (ptr != (UINT32)-1) FILE_munmap( (void *)ptr, 0, size );
1116 K32OBJ_DecCount( &mapping->header );
1121 /***********************************************************************
1122 * FlushViewOfFile (KERNEL32.262)
1124 BOOL32 WINAPI FlushViewOfFile( LPCVOID base, DWORD cbFlush )
1127 UINT32 addr = ROUND_ADDR( base );
1129 dprintf_virtual( stddeb, "FlushViewOfFile at %p for %ld bytes\n",
1132 if (!(view = VIRTUAL_FindView( addr )))
1134 SetLastError( ERROR_INVALID_PARAMETER );
1137 if (!cbFlush) cbFlush = view->size;
1138 if (!msync( (void *)addr, cbFlush, MS_SYNC )) return TRUE;
1139 SetLastError( ERROR_INVALID_PARAMETER );
1143 /***********************************************************************
1144 * UnmapViewOfFile (KERNEL32.540)
1146 BOOL32 WINAPI UnmapViewOfFile( LPVOID addr )
1149 UINT32 base = ROUND_ADDR( addr );
1150 if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1152 SetLastError( ERROR_INVALID_PARAMETER );
1155 VIRTUAL_DeleteView( view );