2 * Win32 virtual memory functions
4 * Copyright 1997 Alexandre Julliard
13 #include <sys/types.h>
37 struct _FV *next; /* Next view */
38 struct _FV *prev; /* Prev view */
39 UINT32 base; /* Base address */
40 UINT32 size; /* Size in bytes */
41 UINT32 flags; /* Allocation flags */
42 UINT32 offset; /* Offset from start of mapped file */
43 FILE_MAPPING *mapping; /* File mapping */
44 BYTE protect; /* Protection for all pages at allocation time */
45 BYTE prot[1]; /* Protection byte for each page */
48 /* Per-page protection byte values */
49 #define VPROT_READ 0x01
50 #define VPROT_WRITE 0x02
51 #define VPROT_EXEC 0x04
52 #define VPROT_WRITECOPY 0x08
53 #define VPROT_GUARD 0x10
54 #define VPROT_NOCACHE 0x20
55 #define VPROT_COMMITTED 0x40
58 #define VFLAG_SYSTEM 0x01
60 /* Conversion from VPROT_* to Win32 flags */
61 static const BYTE VIRTUAL_Win32Flags[16] =
63 PAGE_NOACCESS, /* 0 */
64 PAGE_READONLY, /* READ */
65 PAGE_READWRITE, /* WRITE */
66 PAGE_READWRITE, /* READ | WRITE */
67 PAGE_EXECUTE, /* EXEC */
68 PAGE_EXECUTE_READ, /* READ | EXEC */
69 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
70 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
71 PAGE_WRITECOPY, /* WRITECOPY */
72 PAGE_WRITECOPY, /* READ | WRITECOPY */
73 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
74 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
75 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
76 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
77 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
78 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
82 static FILE_VIEW *VIRTUAL_FirstView;
84 static UINT32 page_shift;
85 static UINT32 page_mask;
86 static UINT32 granularity_mask; /* Allocation granularity (usually 64k) */
88 #define ROUND_ADDR(addr) \
89 ((UINT32)(addr) & ~page_mask)
91 #define ROUND_SIZE(addr,size) \
92 (((UINT32)(size) + ((UINT32)(addr) & page_mask) + page_mask) & ~page_mask)
95 /***********************************************************************
98 static const char *VIRTUAL_GetProtStr( BYTE prot )
100 static char buffer[6];
101 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
102 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
103 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
104 buffer[3] = (prot & VPROT_WRITE) ?
105 ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
106 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
112 /***********************************************************************
115 static void VIRTUAL_DumpView( FILE_VIEW *view )
118 UINT32 addr = view->base;
119 BYTE prot = view->prot[0];
121 dprintf_virtual( stddeb, "View: %08x - %08x%s",
122 view->base, view->base + view->size - 1,
123 (view->flags & VFLAG_SYSTEM) ? " (system)" : "" );
124 if (view->mapping && view->mapping->file)
125 dprintf_virtual( stddeb, " %s @ %08x\n",
126 view->mapping->file->unix_name, view->offset );
128 dprintf_virtual( stddeb, " (anonymous)\n");
130 for (count = i = 1; i < view->size >> page_shift; i++, count++)
132 if (view->prot[i] == prot) continue;
133 dprintf_virtual( stddeb, " %08x - %08x %s\n",
134 addr, addr + (count << page_shift) - 1,
135 VIRTUAL_GetProtStr(prot) );
136 addr += (count << page_shift);
137 prot = view->prot[i];
141 dprintf_virtual( stddeb, " %08x - %08x %s\n",
142 addr, addr + (count << page_shift) - 1,
143 VIRTUAL_GetProtStr(prot) );
147 /***********************************************************************
150 void VIRTUAL_Dump(void)
152 FILE_VIEW *view = VIRTUAL_FirstView;
153 dprintf_virtual( stddeb, "\nDump of all virtual memory views:\n\n" );
156 VIRTUAL_DumpView( view );
162 /***********************************************************************
165 * Find the view containing a given address.
167 static FILE_VIEW *VIRTUAL_FindView( UINT32 addr )
169 FILE_VIEW *view = VIRTUAL_FirstView;
172 if (view->base > addr) return NULL;
173 if (view->base + view->size > addr) return view;
180 /***********************************************************************
183 * Create a new view and add it in the linked list.
185 static FILE_VIEW *VIRTUAL_CreateView( UINT32 base, UINT32 size, UINT32 offset,
186 UINT32 flags, BYTE vprot,
187 FILE_MAPPING *mapping )
189 FILE_VIEW *view, *prev;
191 /* Create the view structure */
194 if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
196 view->size = size << page_shift;
198 view->offset = offset;
199 view->mapping = mapping;
200 view->protect = vprot;
201 memset( view->prot, vprot, size );
203 /* Insert it in the linked list */
205 if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
207 view->next = VIRTUAL_FirstView;
209 if (view->next) view->next->prev = view;
210 VIRTUAL_FirstView = view;
214 prev = VIRTUAL_FirstView;
215 while (prev->next && (prev->next->base < base)) prev = prev->next;
216 view->next = prev->next;
218 if (view->next) view->next->prev = view;
221 if (debugging_virtual) VIRTUAL_DumpView( view );
226 /***********************************************************************
231 static void VIRTUAL_DeleteView( FILE_VIEW *view )
233 munmap( (void *)view->base, view->size );
234 if (view->next) view->next->prev = view->prev;
235 if (view->prev) view->prev->next = view->next;
236 else VIRTUAL_FirstView = view->next;
237 if (view->mapping) K32OBJ_DecCount( &view->mapping->header );
242 /***********************************************************************
243 * VIRTUAL_GetUnixProt
245 * Convert page protections to protection for mmap/mprotect.
247 static int VIRTUAL_GetUnixProt( BYTE vprot )
250 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
252 if (vprot & VPROT_READ) prot |= PROT_READ;
253 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
254 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
260 /***********************************************************************
261 * VIRTUAL_GetWin32Prot
263 * Convert page protections to Win32 flags.
265 static void VIRTUAL_GetWin32Prot( BYTE vprot, DWORD *protect, DWORD *state )
267 *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
268 if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;
269 if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
271 if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
275 /***********************************************************************
278 * Build page protections from Win32 flags.
280 static BYTE VIRTUAL_GetProt( DWORD protect )
284 switch(protect & 0xff)
290 vprot = VPROT_READ | VPROT_WRITE;
293 vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
298 case PAGE_EXECUTE_READ:
299 vprot = VPROT_EXEC | VPROT_READ;
301 case PAGE_EXECUTE_READWRITE:
302 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
304 case PAGE_EXECUTE_WRITECOPY:
305 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
312 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
313 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
318 /***********************************************************************
321 * Change the protection of a range of pages.
323 static BOOL32 VIRTUAL_SetProt( FILE_VIEW *view, UINT32 base,
324 UINT32 size, BYTE vprot )
326 dprintf_virtual( stddeb, "VIRTUAL_SetProt: %08x-%08x %s\n",
327 base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
329 if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
330 return FALSE; /* FIXME: last error */
332 memset( view->prot + ((base - view->base) >> page_shift),
333 vprot, size >> page_shift );
334 if (debugging_virtual) VIRTUAL_DumpView( view );
339 /***********************************************************************
342 * Check that all pages in a range have the given flags.
344 static BOOL32 VIRTUAL_CheckFlags( UINT32 base, UINT32 size, BYTE flags )
349 if (!size) return TRUE;
350 if (!(view = VIRTUAL_FindView( base ))) return FALSE;
351 if (view->base + view->size < base + size) return FALSE;
352 page = (base - view->base) >> page_shift;
353 size = ROUND_SIZE( base, size ) >> page_shift;
354 while (size--) if ((view->prot[page++] & flags) != flags) return FALSE;
359 /***********************************************************************
362 BOOL32 VIRTUAL_Init(void)
365 GetSystemInfo( &sysinfo );
367 page_mask = sysinfo.dwPageSize - 1;
368 granularity_mask = sysinfo.dwAllocationGranularity - 1;
369 /* Make sure we have a power of 2 */
370 assert( !(sysinfo.dwPageSize & page_mask) );
371 assert( !(sysinfo.dwAllocationGranularity & granularity_mask) );
373 while ((1 << page_shift) != sysinfo.dwPageSize) page_shift++;
377 /* Do not use stdio here since it may temporarily change the size
378 * of some segments (ie libc6 adds 0x1000 per open FILE)
380 int fd = open ("/proc/self/maps", O_RDONLY);
387 int start, end, offset;
389 BYTE vprot = VPROT_COMMITTED;
392 int count = sizeof(buffer);
393 while (1 == read(fd, ptr, 1) && *ptr != '\n' && --count > 0)
396 if (*ptr != '\n') break;
399 sscanf( buffer, "%x-%x %c%c%c%c %x",
400 &start, &end, &r, &w, &x, &p, &offset );
401 if (r == 'r') vprot |= VPROT_READ;
402 if (w == 'w') vprot |= VPROT_WRITE;
403 if (x == 'x') vprot |= VPROT_EXEC;
404 if (p == 'p') vprot |= VPROT_WRITECOPY;
405 VIRTUAL_CreateView( start, end - start, 0,
406 VFLAG_SYSTEM, vprot, NULL );
416 /***********************************************************************
417 * VirtualAlloc (KERNEL32.548)
419 LPVOID WINAPI VirtualAlloc( LPVOID addr, DWORD size, DWORD type, DWORD protect)
422 UINT32 base, ptr, view_size;
425 dprintf_virtual( stddeb, "VirtualAlloc: %08x %08lx %lx %08lx\n",
426 (UINT32)addr, size, type, protect );
428 /* Round parameters to a page boundary */
430 if (size > 0x7fc00000) /* 2Gb - 4Mb */
432 SetLastError( ERROR_OUTOFMEMORY );
437 if (type & MEM_RESERVE) /* Round down to 64k boundary */
438 base = ((UINT32)addr + granularity_mask) & ~granularity_mask;
440 base = ROUND_ADDR( addr );
441 size = (((UINT32)addr + size + page_mask) & ~page_mask) - base;
442 if (base + size < base) /* Disallow wrap-around */
444 SetLastError( ERROR_INVALID_PARAMETER );
451 size = (size + page_mask) & ~page_mask;
454 /* Compute the protection flags */
456 if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
457 (type & ~(MEM_COMMIT | MEM_RESERVE)))
459 SetLastError( ERROR_INVALID_PARAMETER );
462 if (type & MEM_COMMIT)
463 vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
466 /* Reserve the memory */
468 if ((type & MEM_RESERVE) || !base)
470 view_size = size + (base ? 0 : granularity_mask + 1);
471 ptr = (UINT32)FILE_mmap( NULL, (LPVOID)base, 0, view_size, 0, 0,
472 VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE );
473 if (ptr == (UINT32)-1)
475 SetLastError( ERROR_OUTOFMEMORY );
480 /* Release the extra memory while keeping the range */
481 /* starting on a 64k boundary. */
483 if (ptr & granularity_mask)
485 UINT32 extra = granularity_mask + 1 - (ptr & granularity_mask);
486 munmap( (void *)ptr, extra );
490 if (view_size > size)
491 munmap( (void *)(ptr + size), view_size - size );
493 if (!(view = VIRTUAL_CreateView( ptr, size, 0, 0, vprot, NULL )))
495 munmap( (void *)ptr, size );
496 SetLastError( ERROR_OUTOFMEMORY );
499 if (debugging_virtual) VIRTUAL_DumpView( view );
503 /* Commit the pages */
505 if (!(view = VIRTUAL_FindView( base )) ||
506 (base + size > view->base + view->size))
508 SetLastError( ERROR_INVALID_PARAMETER );
512 if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
517 /***********************************************************************
518 * VirtualFree (KERNEL32.550)
520 BOOL32 WINAPI VirtualFree( LPVOID addr, DWORD size, DWORD type )
525 dprintf_virtual( stddeb, "VirtualFree: %08x %08lx %lx\n",
526 (UINT32)addr, size, type );
528 /* Fix the parameters */
530 size = ROUND_SIZE( addr, size );
531 base = ROUND_ADDR( addr );
533 if (!(view = VIRTUAL_FindView( base )) ||
534 (base + size > view->base + view->size))
536 SetLastError( ERROR_INVALID_PARAMETER );
540 /* Compute the protection flags */
542 if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
544 SetLastError( ERROR_INVALID_PARAMETER );
550 if (type == MEM_RELEASE)
552 if (size || (base != view->base))
554 SetLastError( ERROR_INVALID_PARAMETER );
557 VIRTUAL_DeleteView( view );
561 /* Decommit the pages */
563 return VIRTUAL_SetProt( view, base, size, 0 );
567 /***********************************************************************
568 * VirtualLock (KERNEL32.551)
570 BOOL32 WINAPI VirtualLock( LPVOID addr, DWORD size )
576 /***********************************************************************
577 * VirtualUnlock (KERNEL32.556)
579 BOOL32 WINAPI VirtualUnlock( LPVOID addr, DWORD size )
585 /***********************************************************************
586 * VirtualProtect (KERNEL32.552)
588 BOOL32 WINAPI VirtualProtect( LPVOID addr, DWORD size, DWORD new_prot,
595 dprintf_virtual( stddeb, "VirtualProtect: %08x %08lx %08lx\n",
596 (UINT32)addr, size, new_prot );
598 /* Fix the parameters */
600 size = ROUND_SIZE( addr, size );
601 base = ROUND_ADDR( addr );
603 if (!(view = VIRTUAL_FindView( base )) ||
604 (base + size > view->base + view->size))
606 SetLastError( ERROR_INVALID_PARAMETER );
610 /* Make sure all the pages are committed */
612 p = view->prot + ((base - view->base) >> page_shift);
613 for (i = size >> page_shift; i; i--, p++)
615 if (!(*p & VPROT_COMMITTED))
617 SetLastError( ERROR_INVALID_PARAMETER );
622 VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL );
623 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
624 return VIRTUAL_SetProt( view, base, size, vprot );
628 /***********************************************************************
629 * VirtualProtectEx (KERNEL32.553)
631 BOOL32 WINAPI VirtualProtectEx( HANDLE32 handle, LPVOID addr, DWORD size,
632 DWORD new_prot, LPDWORD old_prot )
636 PDB32 *pdb = (PDB32 *)PROCESS_GetObjPtr( handle, K32OBJ_PROCESS );
639 if (pdb == pCurrentProcess)
640 ret = VirtualProtect( addr, size, new_prot, old_prot );
642 fprintf(stderr,"Unsupported: VirtualProtectEx on other process\n");
643 K32OBJ_DecCount( &pdb->header );
649 /***********************************************************************
650 * VirtualQuery (KERNEL32.554)
652 BOOL32 WINAPI VirtualQuery( LPCVOID addr, LPMEMORY_BASIC_INFORMATION info,
655 FILE_VIEW *view = VIRTUAL_FirstView;
656 UINT32 base = ROUND_ADDR( addr );
657 UINT32 alloc_base = 0;
660 /* Find the view containing the address */
666 size = 0xffff0000 - alloc_base;
669 if (view->base > base)
671 size = view->base - alloc_base;
675 if (view->base + view->size > base)
677 alloc_base = view->base;
681 alloc_base = view->base + view->size;
685 /* Fill the info structure */
689 info->State = MEM_FREE;
691 info->AllocationProtect = 0;
696 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
697 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
698 for (size = base - alloc_base; size < view->size; size += page_mask+1)
699 if (view->prot[size >> page_shift] != vprot) break;
700 info->AllocationProtect = view->protect;
701 info->Type = MEM_PRIVATE; /* FIXME */
704 info->BaseAddress = (LPVOID)base;
705 info->AllocationBase = (LPVOID)alloc_base;
706 info->RegionSize = size - (base - alloc_base);
711 /***********************************************************************
712 * VirtualQueryEx (KERNEL32.555)
714 BOOL32 WINAPI VirtualQueryEx( HANDLE32 handle, LPCVOID addr,
715 LPMEMORY_BASIC_INFORMATION info, DWORD len )
719 PDB32 *pdb = (PDB32 *)PROCESS_GetObjPtr( handle, K32OBJ_PROCESS );
722 if (pdb == pCurrentProcess)
723 ret = VirtualQuery( addr, info, len );
725 fprintf(stderr,"Unsupported: VirtualQueryEx on other process\n");
726 K32OBJ_DecCount( &pdb->header );
732 /***********************************************************************
733 * IsBadReadPtr32 (KERNEL32.354)
735 BOOL32 WINAPI IsBadReadPtr32( LPCVOID ptr, UINT32 size )
737 return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
738 VPROT_READ | VPROT_COMMITTED );
742 /***********************************************************************
743 * IsBadWritePtr32 (KERNEL32.357)
745 BOOL32 WINAPI IsBadWritePtr32( LPVOID ptr, UINT32 size )
747 return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
748 VPROT_WRITE | VPROT_COMMITTED );
752 /***********************************************************************
753 * IsBadHugeReadPtr32 (KERNEL32.352)
755 BOOL32 WINAPI IsBadHugeReadPtr32( LPCVOID ptr, UINT32 size )
757 return IsBadReadPtr32( ptr, size );
761 /***********************************************************************
762 * IsBadHugeWritePtr32 (KERNEL32.353)
764 BOOL32 WINAPI IsBadHugeWritePtr32( LPVOID ptr, UINT32 size )
766 return IsBadWritePtr32( ptr, size );
770 /***********************************************************************
771 * IsBadCodePtr32 (KERNEL32.351)
773 BOOL32 WINAPI IsBadCodePtr32( FARPROC32 ptr )
775 return !VIRTUAL_CheckFlags( (UINT32)ptr, 1, VPROT_EXEC | VPROT_COMMITTED );
779 /***********************************************************************
780 * IsBadStringPtr32A (KERNEL32.355)
782 BOOL32 WINAPI IsBadStringPtr32A( LPCSTR str, UINT32 max )
787 if (!max) return FALSE;
788 if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
789 page = ((UINT32)str - view->base) >> page_shift;
790 count = page_mask + 1 - ((UINT32)str & page_mask);
794 if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
795 (VPROT_READ | VPROT_COMMITTED))
797 if (count > max) count = max;
799 while (count--) if (!*str++) return FALSE;
800 if (++page >= view->size >> page_shift) return TRUE;
801 count = page_mask + 1;
807 /***********************************************************************
808 * IsBadStringPtr32W (KERNEL32.356)
810 BOOL32 WINAPI IsBadStringPtr32W( LPCWSTR str, UINT32 max )
815 if (!max) return FALSE;
816 if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
817 page = ((UINT32)str - view->base) >> page_shift;
818 count = (page_mask + 1 - ((UINT32)str & page_mask)) / sizeof(WCHAR);
822 if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
823 (VPROT_READ | VPROT_COMMITTED))
825 if (count > max) count = max;
827 while (count--) if (!*str++) return FALSE;
828 if (++page >= view->size >> page_shift) return TRUE;
829 count = (page_mask + 1) / sizeof(WCHAR);
835 /***********************************************************************
836 * CreateFileMapping32A (KERNEL32.46)
838 HANDLE32 WINAPI CreateFileMapping32A(HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
839 DWORD protect, DWORD size_high,
840 DWORD size_low, LPCSTR name )
842 FILE_MAPPING *mapping = NULL;
846 /* First search for an object with the same name */
848 K32OBJ *obj = K32OBJ_FindName( name );
851 if (obj->type == K32OBJ_MEM_MAPPED_FILE)
853 SetLastError( ERROR_ALREADY_EXISTS );
854 return PROCESS_AllocHandle( obj, 0 );
856 SetLastError( ERROR_DUP_NAME );
860 /* Check parameters */
862 dprintf_virtual(stddeb,"CreateFileMapping32A(%x,%p,%08lx,%08lx%08lx,%s)\n",
863 hFile, attr, protect, size_high, size_low, name );
865 vprot = VIRTUAL_GetProt( protect );
866 if (protect & SEC_RESERVE)
868 if (hFile != INVALID_HANDLE_VALUE32)
870 SetLastError( ERROR_INVALID_PARAMETER );
874 else vprot |= VPROT_COMMITTED;
875 if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
877 /* Compute the size and extend the file if necessary */
879 if (hFile == INVALID_HANDLE_VALUE32)
881 if (!size_high && !size_low)
883 SetLastError( ERROR_INVALID_PARAMETER );
888 else /* We have a file */
890 BY_HANDLE_FILE_INFORMATION info;
891 if (!(obj = PROCESS_GetObjPtr( hFile, K32OBJ_FILE ))) goto error;
892 /* FIXME: should check if the file permissions agree
893 * with the required protection flags */
894 if (!GetFileInformationByHandle( hFile, &info )) goto error;
895 if (!size_high && !size_low)
897 size_high = info.nFileSizeHigh;
898 size_low = info.nFileSizeLow;
900 else if ((size_high > info.nFileSizeHigh) ||
901 ((size_high == info.nFileSizeHigh) &&
902 (size_low > info.nFileSizeLow)))
904 /* We have to grow the file */
905 if (SetFilePointer( hFile, size_low, &size_high,
906 FILE_BEGIN ) == 0xffffffff) goto error;
907 if (!SetEndOfFile( hFile )) goto error;
911 /* Allocate the mapping object */
913 if (!(mapping = HeapAlloc( SystemHeap, 0, sizeof(*mapping) ))) goto error;
914 mapping->header.type = K32OBJ_MEM_MAPPED_FILE;
915 mapping->header.refcount = 1;
916 mapping->protect = vprot;
917 mapping->size_high = size_high;
918 mapping->size_low = ROUND_SIZE( 0, size_low );
919 mapping->file = (FILE_OBJECT *)obj;
921 handle = PROCESS_AllocHandle( &mapping->header, 0 );
922 if (handle != INVALID_HANDLE_VALUE32) return handle;
925 if (obj) K32OBJ_DecCount( obj );
926 if (mapping) HeapFree( SystemHeap, 0, mapping );
931 /***********************************************************************
932 * CreateFileMapping32W (KERNEL32.47)
934 HANDLE32 WINAPI CreateFileMapping32W(HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
935 DWORD protect, DWORD size_high,
936 DWORD size_low, LPCWSTR name )
938 LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
939 HANDLE32 ret = CreateFileMapping32A( hFile, attr, protect,
940 size_high, size_low, nameA );
941 HeapFree( GetProcessHeap(), 0, nameA );
946 /***********************************************************************
947 * OpenFileMapping32A (KERNEL32.397)
949 HANDLE32 WINAPI OpenFileMapping32A( DWORD access, BOOL32 inherit, LPCSTR name )
951 K32OBJ *obj = K32OBJ_FindNameType( name, K32OBJ_MEM_MAPPED_FILE );
953 return PROCESS_AllocHandle( obj, 0 );
957 /***********************************************************************
958 * OpenFileMapping32W (KERNEL32.398)
960 HANDLE32 WINAPI OpenFileMapping32W( DWORD access, BOOL32 inherit, LPCWSTR name)
962 LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
963 HANDLE32 ret = OpenFileMapping32A( access, inherit, nameA );
964 HeapFree( GetProcessHeap(), 0, nameA );
969 /***********************************************************************
970 * VIRTUAL_DestroyMapping
972 * Destroy a FILE_MAPPING object.
974 void VIRTUAL_DestroyMapping( K32OBJ *ptr )
976 FILE_MAPPING *mapping = (FILE_MAPPING *)ptr;
977 assert( ptr->type == K32OBJ_MEM_MAPPED_FILE );
979 if (mapping->file) K32OBJ_DecCount( &mapping->file->header );
980 ptr->type = K32OBJ_UNKNOWN;
981 HeapFree( SystemHeap, 0, mapping );
985 /***********************************************************************
986 * MapViewOfFile (KERNEL32.385)
988 LPVOID WINAPI MapViewOfFile( HANDLE32 mapping, DWORD access, DWORD offset_high,
989 DWORD offset_low, DWORD count )
991 return MapViewOfFileEx( mapping, access, offset_high,
992 offset_low, count, NULL );
996 /***********************************************************************
997 * MapViewOfFileEx (KERNEL32.386)
999 LPVOID WINAPI MapViewOfFileEx(HANDLE32 handle, DWORD access, DWORD offset_high,
1000 DWORD offset_low, DWORD count, LPVOID addr )
1002 FILE_MAPPING *mapping;
1004 UINT32 ptr = (UINT32)-1, size = 0;
1005 int flags = MAP_PRIVATE;
1007 /* Check parameters */
1009 if ((offset_low & granularity_mask) ||
1010 (addr && ((UINT32)addr & granularity_mask)))
1012 SetLastError( ERROR_INVALID_PARAMETER );
1016 if (!(mapping = (FILE_MAPPING *)PROCESS_GetObjPtr( handle,
1017 K32OBJ_MEM_MAPPED_FILE )))
1020 if (mapping->size_high || offset_high)
1021 fprintf( stderr, "MapViewOfFileEx: offsets larger than 4Gb not supported\n");
1023 if ((offset_low >= mapping->size_low) ||
1024 (count > mapping->size_low - offset_low))
1026 SetLastError( ERROR_INVALID_PARAMETER );
1029 if (count) size = ROUND_SIZE( offset_low, count );
1030 else size = mapping->size_low - offset_low;
1034 case FILE_MAP_ALL_ACCESS:
1035 case FILE_MAP_WRITE:
1036 case FILE_MAP_WRITE | FILE_MAP_READ:
1037 if (!(mapping->protect & VPROT_WRITE))
1039 SetLastError( ERROR_INVALID_PARAMETER );
1046 case FILE_MAP_COPY | FILE_MAP_READ:
1047 if (mapping->protect & VPROT_READ) break;
1050 SetLastError( ERROR_INVALID_PARAMETER );
1056 dprintf_virtual( stddeb, "MapViewOfFile: handle=%x size=%x offset=%lx\n",
1057 handle, size, offset_low );
1059 ptr = (UINT32)FILE_mmap( mapping->file, addr, 0, size, 0, offset_low,
1060 VIRTUAL_GetUnixProt( mapping->protect ),
1062 if (ptr == (UINT32)-1)
1064 SetLastError( ERROR_OUTOFMEMORY );
1068 if (!(view = VIRTUAL_CreateView( ptr, size, offset_low, 0,
1069 mapping->protect, mapping )))
1071 SetLastError( ERROR_OUTOFMEMORY );
1077 if (ptr != (UINT32)-1) munmap( (void *)ptr, size );
1078 K32OBJ_DecCount( &mapping->header );
1083 /***********************************************************************
1084 * UnmapViewOfFile (KERNEL32.540)
1086 BOOL32 WINAPI UnmapViewOfFile( LPVOID addr )
1089 UINT32 base = ROUND_ADDR( addr );
1090 if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1092 SetLastError( ERROR_INVALID_PARAMETER );
1095 VIRTUAL_DeleteView( view );