2 * Win32 virtual memory functions
4 * Copyright 1997 Alexandre Julliard
14 #include <sys/types.h>
40 struct _FV *next; /* Next view */
41 struct _FV *prev; /* Prev view */
42 UINT32 base; /* Base address */
43 UINT32 size; /* Size in bytes */
44 UINT32 flags; /* Allocation flags */
45 UINT32 offset; /* Offset from start of mapped file */
46 HANDLE32 mapping; /* Handle to the file mapping */
47 HANDLERPROC handlerProc; /* Fault handler */
48 LPVOID handlerArg; /* Fault handler argument */
49 BYTE protect; /* Protection for all pages at allocation time */
50 BYTE prot[1]; /* Protection byte for each page */
54 #define VFLAG_SYSTEM 0x01
56 /* Conversion from VPROT_* to Win32 flags */
57 static const BYTE VIRTUAL_Win32Flags[16] =
59 PAGE_NOACCESS, /* 0 */
60 PAGE_READONLY, /* READ */
61 PAGE_READWRITE, /* WRITE */
62 PAGE_READWRITE, /* READ | WRITE */
63 PAGE_EXECUTE, /* EXEC */
64 PAGE_EXECUTE_READ, /* READ | EXEC */
65 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
66 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
67 PAGE_WRITECOPY, /* WRITECOPY */
68 PAGE_WRITECOPY, /* READ | WRITECOPY */
69 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
70 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
71 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
72 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
73 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
74 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
78 static FILE_VIEW *VIRTUAL_FirstView;
81 /* These are always the same on an i386, and it will be faster this way */
82 # define page_mask 0xfff
83 # define page_shift 12
84 # define granularity_mask 0xffff
86 static UINT32 page_shift;
87 static UINT32 page_mask;
88 static UINT32 granularity_mask; /* Allocation granularity (usually 64k) */
91 #define ROUND_ADDR(addr) \
92 ((UINT32)(addr) & ~page_mask)
94 #define ROUND_SIZE(addr,size) \
95 (((UINT32)(size) + ((UINT32)(addr) & page_mask) + page_mask) & ~page_mask)
97 static void VIRTUAL_DestroyMapping( K32OBJ *obj );
99 const K32OBJ_OPS MEM_MAPPED_FILE_Ops =
101 VIRTUAL_DestroyMapping /* destroy */
104 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
105 if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
107 /***********************************************************************
110 static const char *VIRTUAL_GetProtStr( BYTE prot )
112 static char buffer[6];
113 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
114 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
115 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
116 buffer[3] = (prot & VPROT_WRITE) ?
117 ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
118 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
124 /***********************************************************************
127 static void VIRTUAL_DumpView( FILE_VIEW *view )
130 UINT32 addr = view->base;
131 BYTE prot = view->prot[0];
133 DUMP( "View: %08x - %08x%s",
134 view->base, view->base + view->size - 1,
135 (view->flags & VFLAG_SYSTEM) ? " (system)" : "" );
137 DUMP( " %d @ %08x\n", view->mapping, view->offset );
139 DUMP( " (anonymous)\n");
141 for (count = i = 1; i < view->size >> page_shift; i++, count++)
143 if (view->prot[i] == prot) continue;
144 DUMP( " %08x - %08x %s\n",
145 addr, addr + (count << page_shift) - 1,
146 VIRTUAL_GetProtStr(prot) );
147 addr += (count << page_shift);
148 prot = view->prot[i];
152 DUMP( " %08x - %08x %s\n",
153 addr, addr + (count << page_shift) - 1,
154 VIRTUAL_GetProtStr(prot) );
158 /***********************************************************************
161 void VIRTUAL_Dump(void)
163 FILE_VIEW *view = VIRTUAL_FirstView;
164 DUMP( "\nDump of all virtual memory views:\n\n" );
167 VIRTUAL_DumpView( view );
173 /***********************************************************************
176 * Find the view containing a given address.
182 static FILE_VIEW *VIRTUAL_FindView(
183 UINT32 addr /* [in] Address */
185 FILE_VIEW *view = VIRTUAL_FirstView;
188 if (view->base > addr) return NULL;
189 if (view->base + view->size > addr) return view;
196 /***********************************************************************
199 * Create a new view and add it in the linked list.
201 static FILE_VIEW *VIRTUAL_CreateView( UINT32 base, UINT32 size, UINT32 offset,
202 UINT32 flags, BYTE vprot,
205 FILE_VIEW *view, *prev;
207 /* Create the view structure */
209 assert( !(base & page_mask) );
210 assert( !(size & page_mask) );
212 if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
214 view->size = size << page_shift;
216 view->offset = offset;
217 view->mapping = mapping;
218 view->protect = vprot;
219 view->handlerProc = NULL;
220 memset( view->prot, vprot, size );
222 /* Duplicate the mapping handle */
224 if ((view->mapping != -1) &&
225 !DuplicateHandle( GetCurrentProcess(), view->mapping,
226 GetCurrentProcess(), &view->mapping,
227 0, FALSE, DUPLICATE_SAME_ACCESS ))
233 /* Insert it in the linked list */
235 if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
237 view->next = VIRTUAL_FirstView;
239 if (view->next) view->next->prev = view;
240 VIRTUAL_FirstView = view;
244 prev = VIRTUAL_FirstView;
245 while (prev->next && (prev->next->base < base)) prev = prev->next;
246 view->next = prev->next;
248 if (view->next) view->next->prev = view;
251 VIRTUAL_DEBUG_DUMP_VIEW( view );
256 /***********************************************************************
263 static void VIRTUAL_DeleteView(
264 FILE_VIEW *view /* [in] View */
266 FILE_munmap( (void *)view->base, 0, view->size );
267 if (view->next) view->next->prev = view->prev;
268 if (view->prev) view->prev->next = view->next;
269 else VIRTUAL_FirstView = view->next;
270 if (view->mapping) CloseHandle( view->mapping );
275 /***********************************************************************
276 * VIRTUAL_GetUnixProt
278 * Convert page protections to protection for mmap/mprotect.
280 static int VIRTUAL_GetUnixProt( BYTE vprot )
283 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
285 if (vprot & VPROT_READ) prot |= PROT_READ;
286 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
287 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
293 /***********************************************************************
294 * VIRTUAL_GetWin32Prot
296 * Convert page protections to Win32 flags.
301 static void VIRTUAL_GetWin32Prot(
302 BYTE vprot, /* [in] Page protection flags */
303 DWORD *protect, /* [out] Location to store Win32 protection flags */
304 DWORD *state /* [out] Location to store mem state flag */
307 *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
308 /* if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
309 if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
311 if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
314 if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
318 /***********************************************************************
321 * Build page protections from Win32 flags.
324 * Value of page protection flags
326 static BYTE VIRTUAL_GetProt(
327 DWORD protect /* [in] Win32 protection flags */
331 switch(protect & 0xff)
337 vprot = VPROT_READ | VPROT_WRITE;
340 vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
345 case PAGE_EXECUTE_READ:
346 vprot = VPROT_EXEC | VPROT_READ;
348 case PAGE_EXECUTE_READWRITE:
349 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
351 case PAGE_EXECUTE_WRITECOPY:
352 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
359 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
360 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
365 /***********************************************************************
368 * Change the protection of a range of pages.
374 static BOOL32 VIRTUAL_SetProt(
375 FILE_VIEW *view, /* [in] Pointer to view */
376 UINT32 base, /* [in] Starting address */
377 UINT32 size, /* [in] Size in bytes */
378 BYTE vprot /* [in] Protections to use */
380 TRACE(virtual, "%08x-%08x %s\n",
381 base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
383 if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
384 return FALSE; /* FIXME: last error */
386 memset( view->prot + ((base - view->base) >> page_shift),
387 vprot, size >> page_shift );
388 VIRTUAL_DEBUG_DUMP_VIEW( view );
393 /***********************************************************************
396 * Check that all pages in a range have the given flags.
402 static BOOL32 VIRTUAL_CheckFlags(
403 UINT32 base, /* [in] Starting address */
404 UINT32 size, /* [in] Size in bytes */
405 BYTE flags /* [in] Flags to check for */
410 if (!size) return TRUE;
411 if (!(view = VIRTUAL_FindView( base ))) return FALSE;
412 if (view->base + view->size < base + size) return FALSE;
413 page = (base - view->base) >> page_shift;
414 size = ROUND_SIZE( base, size ) >> page_shift;
415 while (size--) if ((view->prot[page++] & flags) != flags) return FALSE;
420 /***********************************************************************
423 BOOL32 VIRTUAL_Init(void)
428 # ifdef HAVE_GETPAGESIZE
429 page_size = getpagesize();
432 page_size = sysconf(_SC_PAGESIZE);
434 # error Cannot get the page size on this platform
437 page_mask = page_size - 1;
438 granularity_mask = 0xffff; /* hard-coded for now */
439 /* Make sure we have a power of 2 */
440 assert( !(page_size & page_mask) );
442 while ((1 << page_shift) != page_size) page_shift++;
443 #endif /* !__i386__ */
447 /* Do not use stdio here since it may temporarily change the size
448 * of some segments (ie libc6 adds 0x1000 per open FILE)
450 int fd = open ("/proc/self/maps", O_RDONLY);
453 char buffer[512]; /* line might be rather long in 2.1 */
457 int start, end, offset;
459 BYTE vprot = VPROT_COMMITTED;
462 int count = sizeof(buffer);
463 while (1 == read(fd, ptr, 1) && *ptr != '\n' && --count > 0)
466 if (*ptr != '\n') break;
469 sscanf( buffer, "%x-%x %c%c%c%c %x",
470 &start, &end, &r, &w, &x, &p, &offset );
471 if (r == 'r') vprot |= VPROT_READ;
472 if (w == 'w') vprot |= VPROT_WRITE;
473 if (x == 'x') vprot |= VPROT_EXEC;
474 if (p == 'p') vprot |= VPROT_WRITECOPY;
475 VIRTUAL_CreateView( start, end - start, 0,
476 VFLAG_SYSTEM, vprot, -1 );
486 /***********************************************************************
487 * VIRTUAL_GetPageSize
489 DWORD VIRTUAL_GetPageSize(void)
491 return 1 << page_shift;
495 /***********************************************************************
496 * VIRTUAL_GetGranularity
498 DWORD VIRTUAL_GetGranularity(void)
500 return granularity_mask + 1;
504 /***********************************************************************
505 * VIRTUAL_SetFaultHandler
507 BOOL32 VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
511 if (!(view = VIRTUAL_FindView((UINT32)addr))) return FALSE;
512 view->handlerProc = proc;
513 view->handlerArg = arg;
517 /***********************************************************************
518 * VIRTUAL_HandleFault
520 BOOL32 VIRTUAL_HandleFault( LPCVOID addr )
522 FILE_VIEW *view = VIRTUAL_FindView((UINT32)addr);
524 if (view && view->handlerProc)
525 return view->handlerProc(view->handlerArg, addr);
530 /***********************************************************************
531 * VirtualAlloc (KERNEL32.548)
532 * Reserves or commits a region of pages in virtual address space
535 * Base address of allocated region of pages
538 LPVOID WINAPI VirtualAlloc(
539 LPVOID addr, /* [in] Address of region to reserve or commit */
540 DWORD size, /* [in] Size of region */
541 DWORD type, /* [in] Type of allocation */
542 DWORD protect /* [in] Type of access protection */
545 UINT32 base, ptr, view_size;
548 TRACE(virtual, "%08x %08lx %lx %08lx\n",
549 (UINT32)addr, size, type, protect );
551 /* Round parameters to a page boundary */
553 if (size > 0x7fc00000) /* 2Gb - 4Mb */
555 SetLastError( ERROR_OUTOFMEMORY );
560 if (type & MEM_RESERVE) /* Round down to 64k boundary */
561 base = ((UINT32)addr + granularity_mask) & ~granularity_mask;
563 base = ROUND_ADDR( addr );
564 size = (((UINT32)addr + size + page_mask) & ~page_mask) - base;
565 if (base + size < base) /* Disallow wrap-around */
567 SetLastError( ERROR_INVALID_PARAMETER );
574 size = (size + page_mask) & ~page_mask;
577 if (type & MEM_TOP_DOWN) {
578 /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
579 * Is there _ANY_ way to do it with UNIX mmap()?
581 WARN(virtual,"MEM_TOP_DOWN ignored\n");
582 type &= ~MEM_TOP_DOWN;
584 /* Compute the protection flags */
586 if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
587 (type & ~(MEM_COMMIT | MEM_RESERVE)))
589 SetLastError( ERROR_INVALID_PARAMETER );
592 if (type & MEM_COMMIT)
593 vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
596 /* Reserve the memory */
598 if ((type & MEM_RESERVE) || !base)
600 view_size = size + (base ? 0 : granularity_mask + 1);
601 ptr = (UINT32)FILE_dommap( -1, (LPVOID)base, 0, view_size, 0, 0,
602 VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE );
603 if (ptr == (UINT32)-1)
605 SetLastError( ERROR_OUTOFMEMORY );
610 /* Release the extra memory while keeping the range */
611 /* starting on a 64k boundary. */
613 if (ptr & granularity_mask)
615 UINT32 extra = granularity_mask + 1 - (ptr & granularity_mask);
616 FILE_munmap( (void *)ptr, 0, extra );
620 if (view_size > size)
621 FILE_munmap( (void *)(ptr + size), 0, view_size - size );
623 else if (ptr != base)
625 /* We couldn't get the address we wanted */
626 FILE_munmap( (void *)ptr, 0, view_size );
627 SetLastError( ERROR_INVALID_ADDRESS );
630 if (!(view = VIRTUAL_CreateView( ptr, size, 0, 0, vprot, -1 )))
632 FILE_munmap( (void *)ptr, 0, size );
633 SetLastError( ERROR_OUTOFMEMORY );
636 VIRTUAL_DEBUG_DUMP_VIEW( view );
640 /* Commit the pages */
642 if (!(view = VIRTUAL_FindView( base )) ||
643 (base + size > view->base + view->size))
645 SetLastError( ERROR_INVALID_PARAMETER );
649 if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
654 /***********************************************************************
655 * VirtualFree (KERNEL32.550)
656 * Release or decommits a region of pages in virtual address space.
662 BOOL32 WINAPI VirtualFree(
663 LPVOID addr, /* [in] Address of region of committed pages */
664 DWORD size, /* [in] Size of region */
665 DWORD type /* [in] Type of operation */
670 TRACE(virtual, "%08x %08lx %lx\n",
671 (UINT32)addr, size, type );
673 /* Fix the parameters */
675 size = ROUND_SIZE( addr, size );
676 base = ROUND_ADDR( addr );
678 if (!(view = VIRTUAL_FindView( base )) ||
679 (base + size > view->base + view->size))
681 SetLastError( ERROR_INVALID_PARAMETER );
685 /* Compute the protection flags */
687 if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
689 SetLastError( ERROR_INVALID_PARAMETER );
695 if (type == MEM_RELEASE)
697 if (size || (base != view->base))
699 SetLastError( ERROR_INVALID_PARAMETER );
702 VIRTUAL_DeleteView( view );
706 /* Decommit the pages */
707 return VIRTUAL_SetProt( view, base, size, 0 );
711 /***********************************************************************
712 * VirtualLock (KERNEL32.551)
713 * Locks the specified region of virtual address space
716 * Always returns TRUE
722 BOOL32 WINAPI VirtualLock(
723 LPVOID addr, /* [in] Address of first byte of range to lock */
724 DWORD size /* [in] Number of bytes in range to lock */
730 /***********************************************************************
731 * VirtualUnlock (KERNEL32.556)
732 * Unlocks a range of pages in the virtual address space
735 * Always returns TRUE
741 BOOL32 WINAPI VirtualUnlock(
742 LPVOID addr, /* [in] Address of first byte of range */
743 DWORD size /* [in] Number of bytes in range */
749 /***********************************************************************
750 * VirtualProtect (KERNEL32.552)
751 * Changes the access protection on a region of committed pages
757 BOOL32 WINAPI VirtualProtect(
758 LPVOID addr, /* [in] Address of region of committed pages */
759 DWORD size, /* [in] Size of region */
760 DWORD new_prot, /* [in] Desired access protection */
761 LPDWORD old_prot /* [out] Address of variable to get old protection */
767 TRACE(virtual, "%08x %08lx %08lx\n",
768 (UINT32)addr, size, new_prot );
770 /* Fix the parameters */
772 size = ROUND_SIZE( addr, size );
773 base = ROUND_ADDR( addr );
775 if (!(view = VIRTUAL_FindView( base )) ||
776 (base + size > view->base + view->size))
778 SetLastError( ERROR_INVALID_PARAMETER );
782 /* Make sure all the pages are committed */
784 p = view->prot + ((base - view->base) >> page_shift);
785 for (i = size >> page_shift; i; i--, p++)
787 if (!(*p & VPROT_COMMITTED))
789 SetLastError( ERROR_INVALID_PARAMETER );
794 VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL );
795 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
796 return VIRTUAL_SetProt( view, base, size, vprot );
800 /***********************************************************************
801 * VirtualProtectEx (KERNEL32.553)
802 * Changes the access protection on a region of committed pages in the
803 * virtual address space of a specified process
809 BOOL32 WINAPI VirtualProtectEx(
810 HANDLE32 handle, /* [in] Handle of process */
811 LPVOID addr, /* [in] Address of region of committed pages */
812 DWORD size, /* [in] Size of region */
813 DWORD new_prot, /* [in] Desired access protection */
814 LPDWORD old_prot /* [out] Address of variable to get old protection */ )
816 if (PROCESS_IsCurrent( handle ))
817 return VirtualProtect( addr, size, new_prot, old_prot );
818 ERR(virtual,"Unsupported on other process\n");
823 /***********************************************************************
824 * VirtualQuery (KERNEL32.554)
825 * Provides info about a range of pages in virtual address space
828 * Number of bytes returned in information buffer
830 DWORD WINAPI VirtualQuery(
831 LPCVOID addr, /* [in] Address of region */
832 LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
833 DWORD len /* [in] Size of buffer */
835 FILE_VIEW *view = VIRTUAL_FirstView;
836 UINT32 base = ROUND_ADDR( addr );
837 UINT32 alloc_base = 0;
840 /* Find the view containing the address */
846 size = 0xffff0000 - alloc_base;
849 if (view->base > base)
851 size = view->base - alloc_base;
855 if (view->base + view->size > base)
857 alloc_base = view->base;
861 alloc_base = view->base + view->size;
865 /* Fill the info structure */
869 info->State = MEM_FREE;
871 info->AllocationProtect = 0;
876 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
877 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
878 for (size = base - alloc_base; size < view->size; size += page_mask+1)
879 if (view->prot[size >> page_shift] != vprot) break;
880 info->AllocationProtect = view->protect;
881 info->Type = MEM_PRIVATE; /* FIXME */
884 info->BaseAddress = (LPVOID)base;
885 info->AllocationBase = (LPVOID)alloc_base;
886 info->RegionSize = size - (base - alloc_base);
887 return sizeof(*info);
891 /***********************************************************************
892 * VirtualQueryEx (KERNEL32.555)
893 * Provides info about a range of pages in virtual address space of a
897 * Number of bytes returned in information buffer
899 DWORD WINAPI VirtualQueryEx(
900 HANDLE32 handle, /* [in] Handle of process */
901 LPCVOID addr, /* [in] Address of region */
902 LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
903 DWORD len /* [in] Size of buffer */ )
905 if (PROCESS_IsCurrent( handle ))
906 return VirtualQuery( addr, info, len );
907 ERR(virtual,"Unsupported on other process\n");
912 /***********************************************************************
913 * IsBadReadPtr32 (KERNEL32.354)
916 * FALSE: Process has read access to entire block
919 BOOL32 WINAPI IsBadReadPtr32(
920 LPCVOID ptr, /* Address of memory block */
921 UINT32 size /* Size of block */
923 return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
924 VPROT_READ | VPROT_COMMITTED );
928 /***********************************************************************
929 * IsBadWritePtr32 (KERNEL32.357)
932 * FALSE: Process has write access to entire block
935 BOOL32 WINAPI IsBadWritePtr32(
936 LPVOID ptr, /* [in] Address of memory block */
937 UINT32 size /* [in] Size of block in bytes */
939 return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
940 VPROT_WRITE | VPROT_COMMITTED );
944 /***********************************************************************
945 * IsBadHugeReadPtr32 (KERNEL32.352)
947 * FALSE: Process has read access to entire block
950 BOOL32 WINAPI IsBadHugeReadPtr32(
951 LPCVOID ptr, /* [in] Address of memory block */
952 UINT32 size /* [in] Size of block */
954 return IsBadReadPtr32( ptr, size );
958 /***********************************************************************
959 * IsBadHugeWritePtr32 (KERNEL32.353)
961 * FALSE: Process has write access to entire block
964 BOOL32 WINAPI IsBadHugeWritePtr32(
965 LPVOID ptr, /* [in] Address of memory block */
966 UINT32 size /* [in] Size of block */
968 return IsBadWritePtr32( ptr, size );
972 /***********************************************************************
973 * IsBadCodePtr32 (KERNEL32.351)
976 * FALSE: Process has read access to specified memory
979 BOOL32 WINAPI IsBadCodePtr32(
980 FARPROC32 ptr /* [in] Address of function */
982 return !VIRTUAL_CheckFlags( (UINT32)ptr, 1, VPROT_EXEC | VPROT_COMMITTED );
986 /***********************************************************************
987 * IsBadStringPtr32A (KERNEL32.355)
990 * FALSE: Read access to all bytes in string
993 BOOL32 WINAPI IsBadStringPtr32A(
994 LPCSTR str, /* [in] Address of string */
995 UINT32 max /* [in] Maximum size of string */
1000 if (!max) return FALSE;
1001 if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
1002 page = ((UINT32)str - view->base) >> page_shift;
1003 count = page_mask + 1 - ((UINT32)str & page_mask);
1007 if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
1008 (VPROT_READ | VPROT_COMMITTED))
1010 if (count > max) count = max;
1012 while (count--) if (!*str++) return FALSE;
1013 if (++page >= view->size >> page_shift) return TRUE;
1014 count = page_mask + 1;
1020 /***********************************************************************
1021 * IsBadStringPtr32W (KERNEL32.356)
1022 * See IsBadStringPtr32A
1024 BOOL32 WINAPI IsBadStringPtr32W( LPCWSTR str, UINT32 max )
1029 if (!max) return FALSE;
1030 if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
1031 page = ((UINT32)str - view->base) >> page_shift;
1032 count = (page_mask + 1 - ((UINT32)str & page_mask)) / sizeof(WCHAR);
1036 if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
1037 (VPROT_READ | VPROT_COMMITTED))
1039 if (count > max) count = max;
1041 while (count--) if (!*str++) return FALSE;
1042 if (++page >= view->size >> page_shift) return TRUE;
1043 count = (page_mask + 1) / sizeof(WCHAR);
1049 /***********************************************************************
1050 * CreateFileMapping32A (KERNEL32.46)
1051 * Creates a named or unnamed file-mapping object for the specified file
1055 * 0: Mapping object does not exist
1058 HANDLE32 WINAPI CreateFileMapping32A(
1059 HFILE32 hFile, /* [in] Handle of file to map */
1060 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1061 DWORD protect, /* [in] Protection for mapping object */
1062 DWORD size_high, /* [in] High-order 32 bits of object size */
1063 DWORD size_low, /* [in] Low-order 32 bits of object size */
1064 LPCSTR name /* [in] Name of file-mapping object */ )
1066 FILE_MAPPING *mapping = NULL;
1068 struct create_mapping_request req;
1069 struct create_mapping_reply reply = { -1 };
1072 BOOL32 inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1074 /* First search for an object with the same name */
1076 K32OBJ *obj = K32OBJ_FindName( name );
1080 if (obj->type == K32OBJ_MEM_MAPPED_FILE)
1083 CLIENT_SendRequest( REQ_CREATE_MAPPING, -1, 2,
1085 name, name ? strlen(name) + 1 : 0 );
1086 CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
1087 if (reply.handle == -1) return 0;
1088 if (GetLastError() != ERROR_ALREADY_EXISTS)
1089 return 0; /* not supposed to happen */
1090 handle = HANDLE_Alloc( PROCESS_Current(), obj,
1091 FILE_MAP_ALL_ACCESS /*FIXME*/, inherit, reply.handle );
1095 SetLastError( ERROR_DUP_NAME );
1098 K32OBJ_DecCount( obj );
1102 /* Check parameters */
1104 TRACE(virtual,"(%x,%p,%08lx,%08lx%08lx,%s)\n",
1105 hFile, sa, protect, size_high, size_low, debugstr_a(name) );
1107 vprot = VIRTUAL_GetProt( protect );
1108 if (protect & SEC_RESERVE)
1110 if (hFile != INVALID_HANDLE_VALUE32)
1112 SetLastError( ERROR_INVALID_PARAMETER );
1116 else vprot |= VPROT_COMMITTED;
1117 if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1119 /* Compute the size and extend the file if necessary */
1121 if (hFile == INVALID_HANDLE_VALUE32)
1123 if (!size_high && !size_low)
1125 SetLastError( ERROR_INVALID_PARAMETER );
1133 GetTempPath32A(260,buf);
1134 GetTempFileName32A(buf,"wine",0,buf);
1135 hFile = CreateFile32A(
1137 GENERIC_READ|GENERIC_WRITE,
1138 FILE_SHARE_READ|FILE_SHARE_WRITE,/* so we can reuse the tmpfn */
1144 /* FIXME: bad hack to avoid lots of leftover tempfiles */
1146 if (hFile == INVALID_HANDLE_VALUE32)
1147 FIXME(virtual,"could not create temp. file for anon shared mapping: reason was 0x%08lx\n",GetLastError());
1150 if (hFile != INVALID_HANDLE_VALUE32) /* We have a file */
1152 BY_HANDLE_FILE_INFORMATION info;
1153 DWORD access = GENERIC_READ;
1155 if (((protect & 0xff) == PAGE_READWRITE) ||
1156 ((protect & 0xff) == PAGE_WRITECOPY) ||
1157 ((protect & 0xff) == PAGE_EXECUTE_READWRITE) ||
1158 ((protect & 0xff) == PAGE_EXECUTE_WRITECOPY))
1159 access |= GENERIC_WRITE;
1161 if (!(file = HANDLE_GetObjPtr( PROCESS_Current(), hFile, K32OBJ_FILE,
1162 access, &req.handle ))) goto error;
1163 if (!GetFileInformationByHandle( hFile, &info )) goto error;
1164 if (!size_high && !size_low)
1166 size_high = info.nFileSizeHigh;
1167 size_low = info.nFileSizeLow;
1169 else if ((size_high > info.nFileSizeHigh) ||
1170 ((size_high == info.nFileSizeHigh) &&
1171 (size_low > info.nFileSizeLow)))
1173 /* We have to grow the file */
1174 if (SetFilePointer( hFile, size_low, &size_high,
1175 FILE_BEGIN ) == 0xffffffff) goto error;
1176 if (!SetEndOfFile( hFile )) goto error;
1179 else req.handle = -1;
1181 /* Create the server object */
1183 req.size_high = size_high;
1184 req.size_low = ROUND_SIZE( 0, size_low );
1185 req.protect = vprot;
1186 CLIENT_SendRequest( REQ_CREATE_MAPPING, -1, 2,
1188 name, name ? strlen(name) + 1 : 0 );
1189 if (CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL ))
1192 /* Allocate the mapping object */
1194 if (!(mapping = HeapAlloc( SystemHeap, 0, sizeof(*mapping) ))) goto error;
1195 mapping->header.type = K32OBJ_MEM_MAPPED_FILE;
1196 mapping->header.refcount = 1;
1197 mapping->file = file;
1199 if (!K32OBJ_AddName( &mapping->header, name )) handle = 0;
1200 else handle = HANDLE_Alloc( PROCESS_Current(), &mapping->header,
1201 FILE_MAP_ALL_ACCESS /*FIXME*/, inherit, reply.handle );
1202 K32OBJ_DecCount( &mapping->header );
1203 SetLastError(0); /* Last error value is relevant. (see the start of fun) */
1207 if (reply.handle != -1) CLIENT_CloseHandle( reply.handle );
1208 if (file) K32OBJ_DecCount( file );
1209 if (mapping) HeapFree( SystemHeap, 0, mapping );
1214 /***********************************************************************
1215 * CreateFileMapping32W (KERNEL32.47)
1216 * See CreateFileMapping32A
1218 HANDLE32 WINAPI CreateFileMapping32W( HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
1219 DWORD protect, DWORD size_high,
1220 DWORD size_low, LPCWSTR name )
1222 LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
1223 HANDLE32 ret = CreateFileMapping32A( hFile, attr, protect,
1224 size_high, size_low, nameA );
1225 HeapFree( GetProcessHeap(), 0, nameA );
1230 /***********************************************************************
1231 * OpenFileMapping32A (KERNEL32.397)
1232 * Opens a named file-mapping object.
1238 HANDLE32 WINAPI OpenFileMapping32A(
1239 DWORD access, /* [in] Access mode */
1240 BOOL32 inherit, /* [in] Inherit flag */
1241 LPCSTR name ) /* [in] Name of file-mapping object */
1243 HANDLE32 handle = 0;
1245 struct open_named_obj_request req;
1246 struct open_named_obj_reply reply;
1247 int len = name ? strlen(name) + 1 : 0;
1249 req.type = OPEN_MAPPING;
1250 req.access = access;
1251 req.inherit = inherit;
1252 CLIENT_SendRequest( REQ_OPEN_NAMED_OBJ, -1, 2, &req, sizeof(req), name, len );
1253 CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
1255 if (reply.handle != -1)
1258 if ((obj = K32OBJ_FindNameType( name, K32OBJ_MEM_MAPPED_FILE )))
1260 handle = HANDLE_Alloc( PROCESS_Current(), obj, access, inherit, reply.handle );
1261 K32OBJ_DecCount( obj );
1262 if (handle == INVALID_HANDLE_VALUE32)
1263 handle = 0; /* must return 0 on failure, not -1 */
1265 else CLIENT_CloseHandle( reply.handle );
1272 /***********************************************************************
1273 * OpenFileMapping32W (KERNEL32.398)
1274 * See OpenFileMapping32A
1276 HANDLE32 WINAPI OpenFileMapping32W( DWORD access, BOOL32 inherit, LPCWSTR name)
1278 LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
1279 HANDLE32 ret = OpenFileMapping32A( access, inherit, nameA );
1280 HeapFree( GetProcessHeap(), 0, nameA );
1285 /***********************************************************************
1286 * VIRTUAL_DestroyMapping
1288 * Destroy a FILE_MAPPING object.
1290 static void VIRTUAL_DestroyMapping( K32OBJ *ptr )
1292 FILE_MAPPING *mapping = (FILE_MAPPING *)ptr;
1293 assert( ptr->type == K32OBJ_MEM_MAPPED_FILE );
1295 if (mapping->file) K32OBJ_DecCount( mapping->file );
1296 ptr->type = K32OBJ_UNKNOWN;
1297 HeapFree( SystemHeap, 0, mapping );
1301 /***********************************************************************
1302 * MapViewOfFile (KERNEL32.385)
1303 * Maps a view of a file into the address space
1306 * Starting address of mapped view
1309 LPVOID WINAPI MapViewOfFile(
1310 HANDLE32 mapping, /* [in] File-mapping object to map */
1311 DWORD access, /* [in] Access mode */
1312 DWORD offset_high, /* [in] High-order 32 bits of file offset */
1313 DWORD offset_low, /* [in] Low-order 32 bits of file offset */
1314 DWORD count /* [in] Number of bytes to map */
1316 return MapViewOfFileEx( mapping, access, offset_high,
1317 offset_low, count, NULL );
1321 /***********************************************************************
1322 * MapViewOfFileEx (KERNEL32.386)
1323 * Maps a view of a file into the address space
1326 * Starting address of mapped view
1329 LPVOID WINAPI MapViewOfFileEx(
1330 HANDLE32 handle, /* [in] File-mapping object to map */
1331 DWORD access, /* [in] Access mode */
1332 DWORD offset_high, /* [in] High-order 32 bits of file offset */
1333 DWORD offset_low, /* [in] Low-order 32 bits of file offset */
1334 DWORD count, /* [in] Number of bytes to map */
1335 LPVOID addr /* [in] Suggested starting address for mapped view */
1338 UINT32 ptr = (UINT32)-1, size = 0;
1339 int flags = MAP_PRIVATE;
1340 int unix_handle = -1;
1341 struct get_mapping_info_request req;
1342 struct get_mapping_info_reply info;
1344 /* Check parameters */
1346 if ((offset_low & granularity_mask) ||
1347 (addr && ((UINT32)addr & granularity_mask)))
1349 SetLastError( ERROR_INVALID_PARAMETER );
1353 req.handle = HANDLE_GetServerHandle( PROCESS_Current(), handle,
1354 K32OBJ_MEM_MAPPED_FILE, 0 /* FIXME */ );
1355 CLIENT_SendRequest( REQ_GET_MAPPING_INFO, -1, 1, &req, sizeof(req) );
1356 if (CLIENT_WaitSimpleReply( &info, sizeof(info), &unix_handle ))
1359 if (info.size_high || offset_high)
1360 ERR(virtual, "Offsets larger than 4Gb not supported\n");
1362 if ((offset_low >= info.size_low) ||
1363 (count > info.size_low - offset_low))
1365 SetLastError( ERROR_INVALID_PARAMETER );
1368 if (count) size = ROUND_SIZE( offset_low, count );
1369 else size = info.size_low - offset_low;
1373 case FILE_MAP_ALL_ACCESS:
1374 case FILE_MAP_WRITE:
1375 case FILE_MAP_WRITE | FILE_MAP_READ:
1376 if (!(info.protect & VPROT_WRITE))
1378 SetLastError( ERROR_INVALID_PARAMETER );
1385 case FILE_MAP_COPY | FILE_MAP_READ:
1386 if (info.protect & VPROT_READ) break;
1389 SetLastError( ERROR_INVALID_PARAMETER );
1395 TRACE(virtual, "handle=%x size=%x offset=%lx\n",
1396 handle, size, offset_low );
1398 ptr = (UINT32)FILE_dommap( unix_handle,
1399 addr, 0, size, 0, offset_low,
1400 VIRTUAL_GetUnixProt( info.protect ),
1402 if (ptr == (UINT32)-1) {
1403 /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
1404 * Platform Differences":
1405 * Windows NT: ERROR_INVALID_PARAMETER
1406 * Windows 95: ERROR_INVALID_ADDRESS.
1407 * FIXME: So should we add a module dependend check here? -MM
1410 SetLastError( ERROR_OUTOFMEMORY );
1412 SetLastError( ERROR_INVALID_PARAMETER );
1416 if (!(view = VIRTUAL_CreateView( ptr, size, offset_low, 0,
1417 info.protect, handle )))
1419 SetLastError( ERROR_OUTOFMEMORY );
1422 if (unix_handle != -1) close( unix_handle );
1426 if (unix_handle != -1) close( unix_handle );
1427 if (ptr != (UINT32)-1) FILE_munmap( (void *)ptr, 0, size );
1432 /***********************************************************************
1433 * FlushViewOfFile (KERNEL32.262)
1434 * Writes to the disk a byte range within a mapped view of a file
1440 BOOL32 WINAPI FlushViewOfFile(
1441 LPCVOID base, /* [in] Start address of byte range to flush */
1442 DWORD cbFlush /* [in] Number of bytes in range */
1445 UINT32 addr = ROUND_ADDR( base );
1447 TRACE(virtual, "FlushViewOfFile at %p for %ld bytes\n",
1450 if (!(view = VIRTUAL_FindView( addr )))
1452 SetLastError( ERROR_INVALID_PARAMETER );
1455 if (!cbFlush) cbFlush = view->size;
1456 if (!msync( (void *)addr, cbFlush, MS_SYNC )) return TRUE;
1457 SetLastError( ERROR_INVALID_PARAMETER );
1462 /***********************************************************************
1463 * UnmapViewOfFile (KERNEL32.540)
1464 * Unmaps a mapped view of a file.
1467 * Should addr be an LPCVOID?
1473 BOOL32 WINAPI UnmapViewOfFile(
1474 LPVOID addr /* [in] Address where mapped view begins */
1477 UINT32 base = ROUND_ADDR( addr );
1478 if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1480 SetLastError( ERROR_INVALID_PARAMETER );
1483 VIRTUAL_DeleteView( view );
1487 /***********************************************************************
1490 * Helper function to map a file to memory:
1492 * [RETURN] ptr - pointer to mapped file
1494 LPVOID VIRTUAL_MapFileW( LPCWSTR name )
1496 HANDLE32 hFile, hMapping;
1499 hFile = CreateFile32W( name, GENERIC_READ, FILE_SHARE_READ, NULL,
1500 OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, 0);
1501 if (hFile != INVALID_HANDLE_VALUE32)
1503 hMapping = CreateFileMapping32A( hFile, NULL, PAGE_READONLY, 0, 0, NULL );
1504 CloseHandle( hFile );
1507 ptr = MapViewOfFile( hMapping, FILE_MAP_READ, 0, 0, 0 );
1508 CloseHandle( hMapping );