2 * Win32 virtual memory functions
4 * Copyright 1997 Alexandre Julliard
11 #ifdef HAVE_SYS_ERRNO_H
12 #include <sys/errno.h>
18 #include <sys/types.h>
19 #ifdef HAVE_SYS_MMAN_H
30 #include "debugtools.h"
32 DEFAULT_DEBUG_CHANNEL(virtual)
41 struct _FV *next; /* Next view */
42 struct _FV *prev; /* Prev view */
43 UINT base; /* Base address */
44 UINT size; /* Size in bytes */
45 UINT flags; /* Allocation flags */
46 UINT offset; /* Offset from start of mapped file */
47 HANDLE mapping; /* Handle to the file mapping */
48 HANDLERPROC handlerProc; /* Fault handler */
49 LPVOID handlerArg; /* Fault handler argument */
50 BYTE protect; /* Protection for all pages at allocation time */
51 BYTE prot[1]; /* Protection byte for each page */
55 #define VFLAG_SYSTEM 0x01
57 /* Conversion from VPROT_* to Win32 flags */
58 static const BYTE VIRTUAL_Win32Flags[16] =
60 PAGE_NOACCESS, /* 0 */
61 PAGE_READONLY, /* READ */
62 PAGE_READWRITE, /* WRITE */
63 PAGE_READWRITE, /* READ | WRITE */
64 PAGE_EXECUTE, /* EXEC */
65 PAGE_EXECUTE_READ, /* READ | EXEC */
66 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
67 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
68 PAGE_WRITECOPY, /* WRITECOPY */
69 PAGE_WRITECOPY, /* READ | WRITECOPY */
70 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
71 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
72 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
73 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
74 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
75 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
79 static FILE_VIEW *VIRTUAL_FirstView;
82 /* These are always the same on an i386, and it will be faster this way */
83 # define page_mask 0xfff
84 # define page_shift 12
85 # define granularity_mask 0xffff
87 static UINT page_shift;
88 static UINT page_mask;
89 static UINT granularity_mask; /* Allocation granularity (usually 64k) */
92 #define ROUND_ADDR(addr) \
93 ((UINT)(addr) & ~page_mask)
95 #define ROUND_SIZE(addr,size) \
96 (((UINT)(size) + ((UINT)(addr) & page_mask) + page_mask) & ~page_mask)
98 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
99 if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
101 /***********************************************************************
104 static const char *VIRTUAL_GetProtStr( BYTE prot )
106 static char buffer[6];
107 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
108 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
109 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
110 buffer[3] = (prot & VPROT_WRITE) ?
111 ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
112 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
118 /***********************************************************************
121 static void VIRTUAL_DumpView( FILE_VIEW *view )
124 UINT addr = view->base;
125 BYTE prot = view->prot[0];
127 DPRINTF( "View: %08x - %08x%s",
128 view->base, view->base + view->size - 1,
129 (view->flags & VFLAG_SYSTEM) ? " (system)" : "" );
131 DPRINTF( " %d @ %08x\n", view->mapping, view->offset );
133 DPRINTF( " (anonymous)\n");
135 for (count = i = 1; i < view->size >> page_shift; i++, count++)
137 if (view->prot[i] == prot) continue;
138 DPRINTF( " %08x - %08x %s\n",
139 addr, addr + (count << page_shift) - 1,
140 VIRTUAL_GetProtStr(prot) );
141 addr += (count << page_shift);
142 prot = view->prot[i];
146 DPRINTF( " %08x - %08x %s\n",
147 addr, addr + (count << page_shift) - 1,
148 VIRTUAL_GetProtStr(prot) );
152 /***********************************************************************
155 void VIRTUAL_Dump(void)
157 FILE_VIEW *view = VIRTUAL_FirstView;
158 DPRINTF( "\nDump of all virtual memory views:\n\n" );
161 VIRTUAL_DumpView( view );
167 /***********************************************************************
170 * Find the view containing a given address.
176 static FILE_VIEW *VIRTUAL_FindView(
177 UINT addr /* [in] Address */
179 FILE_VIEW *view = VIRTUAL_FirstView;
182 if (view->base > addr) return NULL;
183 if (view->base + view->size > addr) return view;
190 /***********************************************************************
193 * Create a new view and add it in the linked list.
195 static FILE_VIEW *VIRTUAL_CreateView( UINT base, UINT size, UINT offset,
196 UINT flags, BYTE vprot,
199 FILE_VIEW *view, *prev;
201 /* Create the view structure */
203 assert( !(base & page_mask) );
204 assert( !(size & page_mask) );
206 if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
208 view->size = size << page_shift;
210 view->offset = offset;
211 view->mapping = mapping;
212 view->protect = vprot;
213 view->handlerProc = NULL;
214 memset( view->prot, vprot, size );
216 /* Duplicate the mapping handle */
218 if ((view->mapping != -1) &&
219 !DuplicateHandle( GetCurrentProcess(), view->mapping,
220 GetCurrentProcess(), &view->mapping,
221 0, FALSE, DUPLICATE_SAME_ACCESS ))
227 /* Insert it in the linked list */
229 if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
231 view->next = VIRTUAL_FirstView;
233 if (view->next) view->next->prev = view;
234 VIRTUAL_FirstView = view;
238 prev = VIRTUAL_FirstView;
239 while (prev->next && (prev->next->base < base)) prev = prev->next;
240 view->next = prev->next;
242 if (view->next) view->next->prev = view;
245 VIRTUAL_DEBUG_DUMP_VIEW( view );
250 /***********************************************************************
257 static void VIRTUAL_DeleteView(
258 FILE_VIEW *view /* [in] View */
260 FILE_munmap( (void *)view->base, 0, view->size );
261 if (view->next) view->next->prev = view->prev;
262 if (view->prev) view->prev->next = view->next;
263 else VIRTUAL_FirstView = view->next;
264 if (view->mapping) CloseHandle( view->mapping );
269 /***********************************************************************
270 * VIRTUAL_GetUnixProt
272 * Convert page protections to protection for mmap/mprotect.
274 static int VIRTUAL_GetUnixProt( BYTE vprot )
277 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
279 if (vprot & VPROT_READ) prot |= PROT_READ;
280 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
281 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
287 /***********************************************************************
288 * VIRTUAL_GetWin32Prot
290 * Convert page protections to Win32 flags.
295 static void VIRTUAL_GetWin32Prot(
296 BYTE vprot, /* [in] Page protection flags */
297 DWORD *protect, /* [out] Location to store Win32 protection flags */
298 DWORD *state /* [out] Location to store mem state flag */
301 *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
302 /* if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
303 if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
305 if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
308 if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
312 /***********************************************************************
315 * Build page protections from Win32 flags.
318 * Value of page protection flags
320 static BYTE VIRTUAL_GetProt(
321 DWORD protect /* [in] Win32 protection flags */
325 switch(protect & 0xff)
331 vprot = VPROT_READ | VPROT_WRITE;
334 vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
339 case PAGE_EXECUTE_READ:
340 vprot = VPROT_EXEC | VPROT_READ;
342 case PAGE_EXECUTE_READWRITE:
343 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
345 case PAGE_EXECUTE_WRITECOPY:
346 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
353 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
354 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
359 /***********************************************************************
362 * Change the protection of a range of pages.
368 static BOOL VIRTUAL_SetProt(
369 FILE_VIEW *view, /* [in] Pointer to view */
370 UINT base, /* [in] Starting address */
371 UINT size, /* [in] Size in bytes */
372 BYTE vprot /* [in] Protections to use */
374 TRACE("%08x-%08x %s\n",
375 base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
377 if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
378 return FALSE; /* FIXME: last error */
380 memset( view->prot + ((base - view->base) >> page_shift),
381 vprot, size >> page_shift );
382 VIRTUAL_DEBUG_DUMP_VIEW( view );
387 /***********************************************************************
390 * Check that all pages in a range have the given flags.
396 static BOOL VIRTUAL_CheckFlags(
397 UINT base, /* [in] Starting address */
398 UINT size, /* [in] Size in bytes */
399 BYTE flags /* [in] Flags to check for */
404 if (!size) return TRUE;
405 if (!(view = VIRTUAL_FindView( base ))) return FALSE;
406 if (view->base + view->size < base + size) return FALSE;
407 page = (base - view->base) >> page_shift;
408 size = ROUND_SIZE( base, size ) >> page_shift;
409 while (size--) if ((view->prot[page++] & flags) != flags) return FALSE;
414 /***********************************************************************
417 BOOL VIRTUAL_Init(void)
422 # ifdef HAVE_GETPAGESIZE
423 page_size = getpagesize();
426 page_size = sysconf(_SC_PAGESIZE);
428 # error Cannot get the page size on this platform
431 page_mask = page_size - 1;
432 granularity_mask = 0xffff; /* hard-coded for now */
433 /* Make sure we have a power of 2 */
434 assert( !(page_size & page_mask) );
436 while ((1 << page_shift) != page_size) page_shift++;
437 #endif /* !__i386__ */
441 /* Do not use stdio here since it may temporarily change the size
442 * of some segments (ie libc6 adds 0x1000 per open FILE)
444 int fd = open ("/proc/self/maps", O_RDONLY);
447 char buffer[512]; /* line might be rather long in 2.1 */
451 int start, end, offset;
453 BYTE vprot = VPROT_COMMITTED;
456 int count = sizeof(buffer);
457 while (1 == read(fd, ptr, 1) && *ptr != '\n' && --count > 0)
460 if (*ptr != '\n') break;
463 sscanf( buffer, "%x-%x %c%c%c%c %x",
464 &start, &end, &r, &w, &x, &p, &offset );
465 if (r == 'r') vprot |= VPROT_READ;
466 if (w == 'w') vprot |= VPROT_WRITE;
467 if (x == 'x') vprot |= VPROT_EXEC;
468 if (p == 'p') vprot |= VPROT_WRITECOPY;
469 VIRTUAL_CreateView( start, end - start, 0,
470 VFLAG_SYSTEM, vprot, -1 );
480 /***********************************************************************
481 * VIRTUAL_GetPageSize
483 DWORD VIRTUAL_GetPageSize(void)
485 return 1 << page_shift;
489 /***********************************************************************
490 * VIRTUAL_GetGranularity
492 DWORD VIRTUAL_GetGranularity(void)
494 return granularity_mask + 1;
498 /***********************************************************************
499 * VIRTUAL_SetFaultHandler
501 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
505 if (!(view = VIRTUAL_FindView((UINT)addr))) return FALSE;
506 view->handlerProc = proc;
507 view->handlerArg = arg;
511 /***********************************************************************
512 * VIRTUAL_HandleFault
514 BOOL VIRTUAL_HandleFault( LPCVOID addr )
516 FILE_VIEW *view = VIRTUAL_FindView((UINT)addr);
518 if (view && view->handlerProc)
519 return view->handlerProc(view->handlerArg, addr);
524 /***********************************************************************
525 * VirtualAlloc (KERNEL32.548)
526 * Reserves or commits a region of pages in virtual address space
529 * Base address of allocated region of pages
532 LPVOID WINAPI VirtualAlloc(
533 LPVOID addr, /* [in] Address of region to reserve or commit */
534 DWORD size, /* [in] Size of region */
535 DWORD type, /* [in] Type of allocation */
536 DWORD protect /* [in] Type of access protection */
539 UINT base, ptr, view_size;
542 TRACE("%08x %08lx %lx %08lx\n",
543 (UINT)addr, size, type, protect );
545 /* Round parameters to a page boundary */
547 if (size > 0x7fc00000) /* 2Gb - 4Mb */
549 SetLastError( ERROR_OUTOFMEMORY );
554 if (type & MEM_RESERVE) /* Round down to 64k boundary */
555 base = ((UINT)addr + granularity_mask) & ~granularity_mask;
557 base = ROUND_ADDR( addr );
558 size = (((UINT)addr + size + page_mask) & ~page_mask) - base;
559 if (base + size < base) /* Disallow wrap-around */
561 SetLastError( ERROR_INVALID_PARAMETER );
568 size = (size + page_mask) & ~page_mask;
571 if (type & MEM_TOP_DOWN) {
572 /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
573 * Is there _ANY_ way to do it with UNIX mmap()?
575 WARN("MEM_TOP_DOWN ignored\n");
576 type &= ~MEM_TOP_DOWN;
578 /* Compute the protection flags */
580 if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
581 (type & ~(MEM_COMMIT | MEM_RESERVE)))
583 SetLastError( ERROR_INVALID_PARAMETER );
586 if (type & MEM_COMMIT)
587 vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
590 /* Reserve the memory */
592 if ((type & MEM_RESERVE) || !base)
594 view_size = size + (base ? 0 : granularity_mask + 1);
595 ptr = (UINT)FILE_dommap( -1, (LPVOID)base, 0, view_size, 0, 0,
596 VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE );
599 SetLastError( ERROR_OUTOFMEMORY );
604 /* Release the extra memory while keeping the range */
605 /* starting on a 64k boundary. */
607 if (ptr & granularity_mask)
609 UINT extra = granularity_mask + 1 - (ptr & granularity_mask);
610 FILE_munmap( (void *)ptr, 0, extra );
614 if (view_size > size)
615 FILE_munmap( (void *)(ptr + size), 0, view_size - size );
617 else if (ptr != base)
619 /* We couldn't get the address we wanted */
620 FILE_munmap( (void *)ptr, 0, view_size );
621 SetLastError( ERROR_INVALID_ADDRESS );
624 if (!(view = VIRTUAL_CreateView( ptr, size, 0, 0, vprot, -1 )))
626 FILE_munmap( (void *)ptr, 0, size );
627 SetLastError( ERROR_OUTOFMEMORY );
630 VIRTUAL_DEBUG_DUMP_VIEW( view );
634 /* Commit the pages */
636 if (!(view = VIRTUAL_FindView( base )) ||
637 (base + size > view->base + view->size))
639 SetLastError( ERROR_INVALID_PARAMETER );
643 if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
648 /***********************************************************************
649 * VirtualFree (KERNEL32.550)
650 * Release or decommits a region of pages in virtual address space.
656 BOOL WINAPI VirtualFree(
657 LPVOID addr, /* [in] Address of region of committed pages */
658 DWORD size, /* [in] Size of region */
659 DWORD type /* [in] Type of operation */
664 TRACE("%08x %08lx %lx\n",
665 (UINT)addr, size, type );
667 /* Fix the parameters */
669 size = ROUND_SIZE( addr, size );
670 base = ROUND_ADDR( addr );
672 if (!(view = VIRTUAL_FindView( base )) ||
673 (base + size > view->base + view->size))
675 SetLastError( ERROR_INVALID_PARAMETER );
679 /* Compute the protection flags */
681 if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
683 SetLastError( ERROR_INVALID_PARAMETER );
689 if (type == MEM_RELEASE)
691 if (size || (base != view->base))
693 SetLastError( ERROR_INVALID_PARAMETER );
696 VIRTUAL_DeleteView( view );
700 /* Decommit the pages */
701 return VIRTUAL_SetProt( view, base, size, 0 );
705 /***********************************************************************
706 * VirtualLock (KERNEL32.551)
707 * Locks the specified region of virtual address space
710 * Always returns TRUE
716 BOOL WINAPI VirtualLock(
717 LPVOID addr, /* [in] Address of first byte of range to lock */
718 DWORD size /* [in] Number of bytes in range to lock */
724 /***********************************************************************
725 * VirtualUnlock (KERNEL32.556)
726 * Unlocks a range of pages in the virtual address space
729 * Always returns TRUE
735 BOOL WINAPI VirtualUnlock(
736 LPVOID addr, /* [in] Address of first byte of range */
737 DWORD size /* [in] Number of bytes in range */
743 /***********************************************************************
744 * VirtualProtect (KERNEL32.552)
745 * Changes the access protection on a region of committed pages
751 BOOL WINAPI VirtualProtect(
752 LPVOID addr, /* [in] Address of region of committed pages */
753 DWORD size, /* [in] Size of region */
754 DWORD new_prot, /* [in] Desired access protection */
755 LPDWORD old_prot /* [out] Address of variable to get old protection */
761 TRACE("%08x %08lx %08lx\n",
762 (UINT)addr, size, new_prot );
764 /* Fix the parameters */
766 size = ROUND_SIZE( addr, size );
767 base = ROUND_ADDR( addr );
769 if (!(view = VIRTUAL_FindView( base )) ||
770 (base + size > view->base + view->size))
772 SetLastError( ERROR_INVALID_PARAMETER );
776 /* Make sure all the pages are committed */
778 p = view->prot + ((base - view->base) >> page_shift);
779 for (i = size >> page_shift; i; i--, p++)
781 if (!(*p & VPROT_COMMITTED))
783 SetLastError( ERROR_INVALID_PARAMETER );
788 VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL );
789 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
790 return VIRTUAL_SetProt( view, base, size, vprot );
794 /***********************************************************************
795 * VirtualProtectEx (KERNEL32.553)
796 * Changes the access protection on a region of committed pages in the
797 * virtual address space of a specified process
803 BOOL WINAPI VirtualProtectEx(
804 HANDLE handle, /* [in] Handle of process */
805 LPVOID addr, /* [in] Address of region of committed pages */
806 DWORD size, /* [in] Size of region */
807 DWORD new_prot, /* [in] Desired access protection */
808 LPDWORD old_prot /* [out] Address of variable to get old protection */ )
810 if (PROCESS_IsCurrent( handle ))
811 return VirtualProtect( addr, size, new_prot, old_prot );
812 ERR("Unsupported on other process\n");
817 /***********************************************************************
818 * VirtualQuery (KERNEL32.554)
819 * Provides info about a range of pages in virtual address space
822 * Number of bytes returned in information buffer
824 DWORD WINAPI VirtualQuery(
825 LPCVOID addr, /* [in] Address of region */
826 LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
827 DWORD len /* [in] Size of buffer */
829 FILE_VIEW *view = VIRTUAL_FirstView;
830 UINT base = ROUND_ADDR( addr );
834 /* Find the view containing the address */
840 size = 0xffff0000 - alloc_base;
843 if (view->base > base)
845 size = view->base - alloc_base;
849 if (view->base + view->size > base)
851 alloc_base = view->base;
855 alloc_base = view->base + view->size;
859 /* Fill the info structure */
863 info->State = MEM_FREE;
865 info->AllocationProtect = 0;
870 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
871 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
872 for (size = base - alloc_base; size < view->size; size += page_mask+1)
873 if (view->prot[size >> page_shift] != vprot) break;
874 info->AllocationProtect = view->protect;
875 info->Type = MEM_PRIVATE; /* FIXME */
878 info->BaseAddress = (LPVOID)base;
879 info->AllocationBase = (LPVOID)alloc_base;
880 info->RegionSize = size - (base - alloc_base);
881 return sizeof(*info);
885 /***********************************************************************
886 * VirtualQueryEx (KERNEL32.555)
887 * Provides info about a range of pages in virtual address space of a
891 * Number of bytes returned in information buffer
893 DWORD WINAPI VirtualQueryEx(
894 HANDLE handle, /* [in] Handle of process */
895 LPCVOID addr, /* [in] Address of region */
896 LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
897 DWORD len /* [in] Size of buffer */ )
899 if (PROCESS_IsCurrent( handle ))
900 return VirtualQuery( addr, info, len );
901 ERR("Unsupported on other process\n");
906 /***********************************************************************
907 * IsBadReadPtr32 (KERNEL32.354)
910 * FALSE: Process has read access to entire block
913 BOOL WINAPI IsBadReadPtr(
914 LPCVOID ptr, /* Address of memory block */
915 UINT size /* Size of block */
917 return !VIRTUAL_CheckFlags( (UINT)ptr, size,
918 VPROT_READ | VPROT_COMMITTED );
922 /***********************************************************************
923 * IsBadWritePtr32 (KERNEL32.357)
926 * FALSE: Process has write access to entire block
929 BOOL WINAPI IsBadWritePtr(
930 LPVOID ptr, /* [in] Address of memory block */
931 UINT size /* [in] Size of block in bytes */
933 return !VIRTUAL_CheckFlags( (UINT)ptr, size,
934 VPROT_WRITE | VPROT_COMMITTED );
938 /***********************************************************************
939 * IsBadHugeReadPtr32 (KERNEL32.352)
941 * FALSE: Process has read access to entire block
944 BOOL WINAPI IsBadHugeReadPtr(
945 LPCVOID ptr, /* [in] Address of memory block */
946 UINT size /* [in] Size of block */
948 return IsBadReadPtr( ptr, size );
952 /***********************************************************************
953 * IsBadHugeWritePtr32 (KERNEL32.353)
955 * FALSE: Process has write access to entire block
958 BOOL WINAPI IsBadHugeWritePtr(
959 LPVOID ptr, /* [in] Address of memory block */
960 UINT size /* [in] Size of block */
962 return IsBadWritePtr( ptr, size );
966 /***********************************************************************
967 * IsBadCodePtr32 (KERNEL32.351)
970 * FALSE: Process has read access to specified memory
973 BOOL WINAPI IsBadCodePtr(
974 FARPROC ptr /* [in] Address of function */
976 return !VIRTUAL_CheckFlags( (UINT)ptr, 1, VPROT_EXEC | VPROT_COMMITTED );
980 /***********************************************************************
981 * IsBadStringPtr32A (KERNEL32.355)
984 * FALSE: Read access to all bytes in string
987 BOOL WINAPI IsBadStringPtrA(
988 LPCSTR str, /* [in] Address of string */
989 UINT max /* [in] Maximum size of string */
994 if (!max) return FALSE;
995 if (!(view = VIRTUAL_FindView( (UINT)str ))) return TRUE;
996 page = ((UINT)str - view->base) >> page_shift;
997 count = page_mask + 1 - ((UINT)str & page_mask);
1001 if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
1002 (VPROT_READ | VPROT_COMMITTED))
1004 if (count > max) count = max;
1006 while (count--) if (!*str++) return FALSE;
1007 if (++page >= view->size >> page_shift) return TRUE;
1008 count = page_mask + 1;
1014 /***********************************************************************
1015 * IsBadStringPtr32W (KERNEL32.356)
1016 * See IsBadStringPtr32A
1018 BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
1023 if (!max) return FALSE;
1024 if (!(view = VIRTUAL_FindView( (UINT)str ))) return TRUE;
1025 page = ((UINT)str - view->base) >> page_shift;
1026 count = (page_mask + 1 - ((UINT)str & page_mask)) / sizeof(WCHAR);
1030 if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
1031 (VPROT_READ | VPROT_COMMITTED))
1033 if (count > max) count = max;
1035 while (count--) if (!*str++) return FALSE;
1036 if (++page >= view->size >> page_shift) return TRUE;
1037 count = (page_mask + 1) / sizeof(WCHAR);
1043 /***********************************************************************
1044 * CreateFileMapping32A (KERNEL32.46)
1045 * Creates a named or unnamed file-mapping object for the specified file
1049 * 0: Mapping object does not exist
1052 HANDLE WINAPI CreateFileMappingA(
1053 HFILE hFile, /* [in] Handle of file to map */
1054 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1055 DWORD protect, /* [in] Protection for mapping object */
1056 DWORD size_high, /* [in] High-order 32 bits of object size */
1057 DWORD size_low, /* [in] Low-order 32 bits of object size */
1058 LPCSTR name /* [in] Name of file-mapping object */ )
1060 struct create_mapping_request *req = get_req_buffer();
1063 /* Check parameters */
1065 TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1066 hFile, sa, protect, size_high, size_low, debugstr_a(name) );
1068 vprot = VIRTUAL_GetProt( protect );
1069 if (protect & SEC_RESERVE)
1071 if (hFile != INVALID_HANDLE_VALUE)
1073 SetLastError( ERROR_INVALID_PARAMETER );
1077 else vprot |= VPROT_COMMITTED;
1078 if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1080 /* Create the server object */
1082 req->file_handle = hFile;
1083 req->size_high = size_high;
1084 req->size_low = size_low;
1085 req->protect = vprot;
1086 req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1087 lstrcpynA( req->name, name ? name : "", server_remaining(req->name) );
1089 server_call( REQ_CREATE_MAPPING );
1090 if (req->handle == -1) return 0;
1095 /***********************************************************************
1096 * CreateFileMapping32W (KERNEL32.47)
1097 * See CreateFileMapping32A
1099 HANDLE WINAPI CreateFileMappingW( HFILE hFile, LPSECURITY_ATTRIBUTES attr,
1100 DWORD protect, DWORD size_high,
1101 DWORD size_low, LPCWSTR name )
1103 LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
1104 HANDLE ret = CreateFileMappingA( hFile, attr, protect,
1105 size_high, size_low, nameA );
1106 HeapFree( GetProcessHeap(), 0, nameA );
1111 /***********************************************************************
1112 * OpenFileMapping32A (KERNEL32.397)
1113 * Opens a named file-mapping object.
1119 HANDLE WINAPI OpenFileMappingA(
1120 DWORD access, /* [in] Access mode */
1121 BOOL inherit, /* [in] Inherit flag */
1122 LPCSTR name ) /* [in] Name of file-mapping object */
1124 struct open_mapping_request *req = get_req_buffer();
1126 req->access = access;
1127 req->inherit = inherit;
1128 lstrcpynA( req->name, name ? name : "", server_remaining(req->name) );
1129 server_call( REQ_OPEN_MAPPING );
1130 if (req->handle == -1) return 0; /* must return 0 on failure, not -1 */
1135 /***********************************************************************
1136 * OpenFileMapping32W (KERNEL32.398)
1137 * See OpenFileMapping32A
1139 HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
1141 LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
1142 HANDLE ret = OpenFileMappingA( access, inherit, nameA );
1143 HeapFree( GetProcessHeap(), 0, nameA );
1148 /***********************************************************************
1149 * MapViewOfFile (KERNEL32.385)
1150 * Maps a view of a file into the address space
1153 * Starting address of mapped view
1156 LPVOID WINAPI MapViewOfFile(
1157 HANDLE mapping, /* [in] File-mapping object to map */
1158 DWORD access, /* [in] Access mode */
1159 DWORD offset_high, /* [in] High-order 32 bits of file offset */
1160 DWORD offset_low, /* [in] Low-order 32 bits of file offset */
1161 DWORD count /* [in] Number of bytes to map */
1163 return MapViewOfFileEx( mapping, access, offset_high,
1164 offset_low, count, NULL );
1168 /***********************************************************************
1169 * MapViewOfFileEx (KERNEL32.386)
1170 * Maps a view of a file into the address space
1173 * Starting address of mapped view
1176 LPVOID WINAPI MapViewOfFileEx(
1177 HANDLE handle, /* [in] File-mapping object to map */
1178 DWORD access, /* [in] Access mode */
1179 DWORD offset_high, /* [in] High-order 32 bits of file offset */
1180 DWORD offset_low, /* [in] Low-order 32 bits of file offset */
1181 DWORD count, /* [in] Number of bytes to map */
1182 LPVOID addr /* [in] Suggested starting address for mapped view */
1185 UINT ptr = (UINT)-1, size = 0;
1186 int flags = MAP_PRIVATE;
1187 int unix_handle = -1;
1189 struct get_mapping_info_request *req = get_req_buffer();
1191 /* Check parameters */
1193 if ((offset_low & granularity_mask) ||
1194 (addr && ((UINT)addr & granularity_mask)))
1196 SetLastError( ERROR_INVALID_PARAMETER );
1200 req->handle = handle;
1201 if (server_call_fd( REQ_GET_MAPPING_INFO, -1, &unix_handle )) goto error;
1203 if (req->size_high || offset_high)
1204 ERR("Offsets larger than 4Gb not supported\n");
1206 if ((offset_low >= req->size_low) ||
1207 (count > req->size_low - offset_low))
1209 SetLastError( ERROR_INVALID_PARAMETER );
1212 if (count) size = ROUND_SIZE( offset_low, count );
1213 else size = req->size_low - offset_low;
1214 prot = req->protect;
1218 case FILE_MAP_ALL_ACCESS:
1219 case FILE_MAP_WRITE:
1220 case FILE_MAP_WRITE | FILE_MAP_READ:
1221 if (!(prot & VPROT_WRITE))
1223 SetLastError( ERROR_INVALID_PARAMETER );
1230 case FILE_MAP_COPY | FILE_MAP_READ:
1231 if (prot & VPROT_READ) break;
1234 SetLastError( ERROR_INVALID_PARAMETER );
1240 TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low );
1242 ptr = (UINT)FILE_dommap( unix_handle, addr, 0, size, 0, offset_low,
1243 VIRTUAL_GetUnixProt( prot ), flags );
1244 if (ptr == (UINT)-1) {
1245 /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
1246 * Platform Differences":
1247 * Windows NT: ERROR_INVALID_PARAMETER
1248 * Windows 95: ERROR_INVALID_ADDRESS.
1249 * FIXME: So should we add a module dependend check here? -MM
1252 SetLastError( ERROR_OUTOFMEMORY );
1254 SetLastError( ERROR_INVALID_PARAMETER );
1258 if (!(view = VIRTUAL_CreateView( ptr, size, offset_low, 0, prot, handle )))
1260 SetLastError( ERROR_OUTOFMEMORY );
1263 if (unix_handle != -1) close( unix_handle );
1267 if (unix_handle != -1) close( unix_handle );
1268 if (ptr != (UINT)-1) FILE_munmap( (void *)ptr, 0, size );
1273 /***********************************************************************
1274 * FlushViewOfFile (KERNEL32.262)
1275 * Writes to the disk a byte range within a mapped view of a file
1281 BOOL WINAPI FlushViewOfFile(
1282 LPCVOID base, /* [in] Start address of byte range to flush */
1283 DWORD cbFlush /* [in] Number of bytes in range */
1286 UINT addr = ROUND_ADDR( base );
1288 TRACE("FlushViewOfFile at %p for %ld bytes\n",
1291 if (!(view = VIRTUAL_FindView( addr )))
1293 SetLastError( ERROR_INVALID_PARAMETER );
1296 if (!cbFlush) cbFlush = view->size;
1297 if (!msync( (void *)addr, cbFlush, MS_SYNC )) return TRUE;
1298 SetLastError( ERROR_INVALID_PARAMETER );
1303 /***********************************************************************
1304 * UnmapViewOfFile (KERNEL32.540)
1305 * Unmaps a mapped view of a file.
1308 * Should addr be an LPCVOID?
1314 BOOL WINAPI UnmapViewOfFile(
1315 LPVOID addr /* [in] Address where mapped view begins */
1318 UINT base = ROUND_ADDR( addr );
1319 if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1321 SetLastError( ERROR_INVALID_PARAMETER );
1324 VIRTUAL_DeleteView( view );
1328 /***********************************************************************
1331 * Helper function to map a file to memory:
1333 * [RETURN] ptr - pointer to mapped file
1335 LPVOID VIRTUAL_MapFileW( LPCWSTR name )
1337 HANDLE hFile, hMapping;
1340 hFile = CreateFileW( name, GENERIC_READ, FILE_SHARE_READ, NULL,
1341 OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, 0);
1342 if (hFile != INVALID_HANDLE_VALUE)
1344 hMapping = CreateFileMappingA( hFile, NULL, PAGE_READONLY, 0, 0, NULL );
1345 CloseHandle( hFile );
1348 ptr = MapViewOfFile( hMapping, FILE_MAP_READ, 0, 0, 0 );
1349 CloseHandle( hMapping );