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
)
285 *protect
= VIRTUAL_Win32Flags
[vprot
& 0x0f];
286 if (vprot
& VPROT_GUARD
) *protect
|= PAGE_GUARD
;
287 if (vprot
& VPROT_NOCACHE
) *protect
|= PAGE_NOCACHE
;
290 if (state
) *state
= (vprot
& VPROT_COMMITTED
) ? MEM_COMMIT
: MEM_RESERVE
;
294 /***********************************************************************
297 * Build page protections from Win32 flags.
299 static BYTE
VIRTUAL_GetProt( DWORD protect
)
303 switch(protect
& 0xff)
309 vprot
= VPROT_READ
| VPROT_WRITE
;
312 vprot
= VPROT_READ
| VPROT_WRITE
| VPROT_WRITECOPY
;
317 case PAGE_EXECUTE_READ
:
318 vprot
= VPROT_EXEC
| VPROT_READ
;
320 case PAGE_EXECUTE_READWRITE
:
321 vprot
= VPROT_EXEC
| VPROT_READ
| VPROT_WRITE
| VPROT_WRITECOPY
;
323 case PAGE_EXECUTE_WRITECOPY
:
324 vprot
= VPROT_EXEC
| VPROT_READ
| VPROT_WRITE
;
331 if (protect
& PAGE_GUARD
) vprot
|= VPROT_GUARD
;
332 if (protect
& PAGE_NOCACHE
) vprot
|= VPROT_NOCACHE
;
337 /***********************************************************************
340 * Change the protection of a range of pages.
342 static BOOL32
VIRTUAL_SetProt( FILE_VIEW
*view
, UINT32 base
,
343 UINT32 size
, BYTE vprot
)
345 dprintf_virtual( stddeb
, "VIRTUAL_SetProt: %08x-%08x %s\n",
346 base
, base
+ size
- 1, VIRTUAL_GetProtStr( vprot
) );
348 if (mprotect( (void *)base
, size
, VIRTUAL_GetUnixProt(vprot
) ))
349 return FALSE
; /* FIXME: last error */
351 memset( view
->prot
+ ((base
- view
->base
) >> page_shift
),
352 vprot
, size
>> page_shift
);
353 if (debugging_virtual
) VIRTUAL_DumpView( view
);
358 /***********************************************************************
361 * Check that all pages in a range have the given flags.
363 static BOOL32
VIRTUAL_CheckFlags( UINT32 base
, UINT32 size
, BYTE flags
)
368 if (!size
) return TRUE
;
369 if (!(view
= VIRTUAL_FindView( base
))) return FALSE
;
370 if (view
->base
+ view
->size
< base
+ size
) return FALSE
;
371 page
= (base
- view
->base
) >> page_shift
;
372 size
= ROUND_SIZE( base
, size
) >> page_shift
;
373 while (size
--) if ((view
->prot
[page
++] & flags
) != flags
) return FALSE
;
378 /***********************************************************************
381 BOOL32
VIRTUAL_Init(void)
384 GetSystemInfo( &sysinfo
);
386 page_mask
= sysinfo
.dwPageSize
- 1;
387 granularity_mask
= sysinfo
.dwAllocationGranularity
- 1;
388 /* Make sure we have a power of 2 */
389 assert( !(sysinfo
.dwPageSize
& page_mask
) );
390 assert( !(sysinfo
.dwAllocationGranularity
& granularity_mask
) );
392 while ((1 << page_shift
) != sysinfo
.dwPageSize
) page_shift
++;
396 /* Do not use stdio here since it may temporarily change the size
397 * of some segments (ie libc6 adds 0x1000 per open FILE)
399 int fd
= open ("/proc/self/maps", O_RDONLY
);
406 int start
, end
, offset
;
408 BYTE vprot
= VPROT_COMMITTED
;
411 int count
= sizeof(buffer
);
412 while (1 == read(fd
, ptr
, 1) && *ptr
!= '\n' && --count
> 0)
415 if (*ptr
!= '\n') break;
418 sscanf( buffer
, "%x-%x %c%c%c%c %x",
419 &start
, &end
, &r
, &w
, &x
, &p
, &offset
);
420 if (r
== 'r') vprot
|= VPROT_READ
;
421 if (w
== 'w') vprot
|= VPROT_WRITE
;
422 if (x
== 'x') vprot
|= VPROT_EXEC
;
423 if (p
== 'p') vprot
|= VPROT_WRITECOPY
;
424 VIRTUAL_CreateView( start
, end
- start
, 0,
425 VFLAG_SYSTEM
, vprot
, NULL
);
435 /***********************************************************************
436 * VirtualAlloc (KERNEL32.548)
438 LPVOID WINAPI
VirtualAlloc( LPVOID addr
, DWORD size
, DWORD type
, DWORD protect
)
441 UINT32 base
, ptr
, view_size
;
444 dprintf_virtual( stddeb
, "VirtualAlloc: %08x %08lx %lx %08lx\n",
445 (UINT32
)addr
, size
, type
, protect
);
447 /* Round parameters to a page boundary */
449 if (size
> 0x7fc00000) /* 2Gb - 4Mb */
451 SetLastError( ERROR_OUTOFMEMORY
);
456 if (type
& MEM_RESERVE
) /* Round down to 64k boundary */
457 base
= ((UINT32
)addr
+ granularity_mask
) & ~granularity_mask
;
459 base
= ROUND_ADDR( addr
);
460 size
= (((UINT32
)addr
+ size
+ page_mask
) & ~page_mask
) - base
;
461 if (base
+ size
< base
) /* Disallow wrap-around */
463 SetLastError( ERROR_INVALID_PARAMETER
);
470 size
= (size
+ page_mask
) & ~page_mask
;
473 /* Compute the protection flags */
475 if (!(type
& (MEM_COMMIT
| MEM_RESERVE
)) ||
476 (type
& ~(MEM_COMMIT
| MEM_RESERVE
)))
478 SetLastError( ERROR_INVALID_PARAMETER
);
481 if (type
& MEM_COMMIT
)
482 vprot
= VIRTUAL_GetProt( protect
) | VPROT_COMMITTED
;
485 /* Reserve the memory */
487 if ((type
& MEM_RESERVE
) || !base
)
489 view_size
= size
+ (base
? 0 : granularity_mask
+ 1);
490 ptr
= (UINT32
)FILE_dommap( NULL
, (LPVOID
)base
, 0, view_size
, 0, 0,
491 VIRTUAL_GetUnixProt( vprot
), MAP_PRIVATE
);
492 if (ptr
== (UINT32
)-1)
494 SetLastError( ERROR_OUTOFMEMORY
);
499 /* Release the extra memory while keeping the range */
500 /* starting on a 64k boundary. */
502 if (ptr
& granularity_mask
)
504 UINT32 extra
= granularity_mask
+ 1 - (ptr
& granularity_mask
);
505 FILE_munmap( (void *)ptr
, 0, extra
);
509 if (view_size
> size
)
510 FILE_munmap( (void *)(ptr
+ size
), 0, view_size
- size
);
512 else if (ptr
!= base
)
514 /* We couldn't get the address we wanted */
515 FILE_munmap( (void *)ptr
, 0, view_size
);
516 SetLastError( ERROR_INVALID_ADDRESS
);
519 if (!(view
= VIRTUAL_CreateView( ptr
, size
, 0, 0, vprot
, NULL
)))
521 FILE_munmap( (void *)ptr
, 0, size
);
522 SetLastError( ERROR_OUTOFMEMORY
);
525 if (debugging_virtual
) VIRTUAL_DumpView( view
);
529 /* Commit the pages */
531 if (!(view
= VIRTUAL_FindView( base
)) ||
532 (base
+ size
> view
->base
+ view
->size
))
534 SetLastError( ERROR_INVALID_PARAMETER
);
538 if (!VIRTUAL_SetProt( view
, base
, size
, vprot
)) return NULL
;
543 /***********************************************************************
544 * VirtualFree (KERNEL32.550)
546 BOOL32 WINAPI
VirtualFree( LPVOID addr
, DWORD size
, DWORD type
)
551 dprintf_virtual( stddeb
, "VirtualFree: %08x %08lx %lx\n",
552 (UINT32
)addr
, size
, type
);
554 /* Fix the parameters */
556 size
= ROUND_SIZE( addr
, size
);
557 base
= ROUND_ADDR( addr
);
559 if (!(view
= VIRTUAL_FindView( base
)) ||
560 (base
+ size
> view
->base
+ view
->size
))
562 SetLastError( ERROR_INVALID_PARAMETER
);
566 /* Compute the protection flags */
568 if ((type
!= MEM_DECOMMIT
) && (type
!= MEM_RELEASE
))
570 SetLastError( ERROR_INVALID_PARAMETER
);
576 if (type
== MEM_RELEASE
)
578 if (size
|| (base
!= view
->base
))
580 SetLastError( ERROR_INVALID_PARAMETER
);
583 VIRTUAL_DeleteView( view
);
587 /* Decommit the pages */
589 return VIRTUAL_SetProt( view
, base
, size
, 0 );
593 /***********************************************************************
594 * VirtualLock (KERNEL32.551)
596 BOOL32 WINAPI
VirtualLock( LPVOID addr
, DWORD size
)
602 /***********************************************************************
603 * VirtualUnlock (KERNEL32.556)
605 BOOL32 WINAPI
VirtualUnlock( LPVOID addr
, DWORD size
)
611 /***********************************************************************
612 * VirtualProtect (KERNEL32.552)
614 BOOL32 WINAPI
VirtualProtect( LPVOID addr
, DWORD size
, DWORD new_prot
,
621 dprintf_virtual( stddeb
, "VirtualProtect: %08x %08lx %08lx\n",
622 (UINT32
)addr
, size
, new_prot
);
624 /* Fix the parameters */
626 size
= ROUND_SIZE( addr
, size
);
627 base
= ROUND_ADDR( addr
);
629 if (!(view
= VIRTUAL_FindView( base
)) ||
630 (base
+ size
> view
->base
+ view
->size
))
632 SetLastError( ERROR_INVALID_PARAMETER
);
636 /* Make sure all the pages are committed */
638 p
= view
->prot
+ ((base
- view
->base
) >> page_shift
);
639 for (i
= size
>> page_shift
; i
; i
--, p
++)
641 if (!(*p
& VPROT_COMMITTED
))
643 SetLastError( ERROR_INVALID_PARAMETER
);
648 VIRTUAL_GetWin32Prot( view
->prot
[0], old_prot
, NULL
);
649 vprot
= VIRTUAL_GetProt( new_prot
) | VPROT_COMMITTED
;
650 return VIRTUAL_SetProt( view
, base
, size
, vprot
);
654 /***********************************************************************
655 * VirtualProtectEx (KERNEL32.553)
657 BOOL32 WINAPI
VirtualProtectEx( HANDLE32 handle
, LPVOID addr
, DWORD size
,
658 DWORD new_prot
, LPDWORD old_prot
)
662 PDB32
*pdb
= PROCESS_GetPtr( handle
, PROCESS_VM_OPERATION
);
665 if (pdb
== PROCESS_Current())
666 ret
= VirtualProtect( addr
, size
, new_prot
, old_prot
);
668 fprintf(stderr
,"Unsupported: VirtualProtectEx on other process\n");
669 K32OBJ_DecCount( &pdb
->header
);
675 /***********************************************************************
676 * VirtualQuery (KERNEL32.554)
678 BOOL32 WINAPI
VirtualQuery( LPCVOID addr
, LPMEMORY_BASIC_INFORMATION info
,
681 FILE_VIEW
*view
= VIRTUAL_FirstView
;
682 UINT32 base
= ROUND_ADDR( addr
);
683 UINT32 alloc_base
= 0;
686 /* Find the view containing the address */
692 size
= 0xffff0000 - alloc_base
;
695 if (view
->base
> base
)
697 size
= view
->base
- alloc_base
;
701 if (view
->base
+ view
->size
> base
)
703 alloc_base
= view
->base
;
707 alloc_base
= view
->base
+ view
->size
;
711 /* Fill the info structure */
715 info
->State
= MEM_FREE
;
717 info
->AllocationProtect
= 0;
722 BYTE vprot
= view
->prot
[(base
- alloc_base
) >> page_shift
];
723 VIRTUAL_GetWin32Prot( vprot
, &info
->Protect
, &info
->State
);
724 for (size
= base
- alloc_base
; size
< view
->size
; size
+= page_mask
+1)
725 if (view
->prot
[size
>> page_shift
] != vprot
) break;
726 info
->AllocationProtect
= view
->protect
;
727 info
->Type
= MEM_PRIVATE
; /* FIXME */
730 info
->BaseAddress
= (LPVOID
)base
;
731 info
->AllocationBase
= (LPVOID
)alloc_base
;
732 info
->RegionSize
= size
- (base
- alloc_base
);
737 /***********************************************************************
738 * VirtualQueryEx (KERNEL32.555)
740 BOOL32 WINAPI
VirtualQueryEx( HANDLE32 handle
, LPCVOID addr
,
741 LPMEMORY_BASIC_INFORMATION info
, DWORD len
)
745 PDB32
*pdb
= PROCESS_GetPtr( handle
, PROCESS_QUERY_INFORMATION
);
748 if (pdb
== PROCESS_Current())
749 ret
= VirtualQuery( addr
, info
, len
);
751 fprintf(stderr
,"Unsupported: VirtualQueryEx on other process\n");
752 K32OBJ_DecCount( &pdb
->header
);
758 /***********************************************************************
759 * IsBadReadPtr32 (KERNEL32.354)
761 BOOL32 WINAPI
IsBadReadPtr32( LPCVOID ptr
, UINT32 size
)
763 return !VIRTUAL_CheckFlags( (UINT32
)ptr
, size
,
764 VPROT_READ
| VPROT_COMMITTED
);
768 /***********************************************************************
769 * IsBadWritePtr32 (KERNEL32.357)
771 BOOL32 WINAPI
IsBadWritePtr32( LPVOID ptr
, UINT32 size
)
773 return !VIRTUAL_CheckFlags( (UINT32
)ptr
, size
,
774 VPROT_WRITE
| VPROT_COMMITTED
);
778 /***********************************************************************
779 * IsBadHugeReadPtr32 (KERNEL32.352)
781 BOOL32 WINAPI
IsBadHugeReadPtr32( LPCVOID ptr
, UINT32 size
)
783 return IsBadReadPtr32( ptr
, size
);
787 /***********************************************************************
788 * IsBadHugeWritePtr32 (KERNEL32.353)
790 BOOL32 WINAPI
IsBadHugeWritePtr32( LPVOID ptr
, UINT32 size
)
792 return IsBadWritePtr32( ptr
, size
);
796 /***********************************************************************
797 * IsBadCodePtr32 (KERNEL32.351)
799 BOOL32 WINAPI
IsBadCodePtr32( FARPROC32 ptr
)
801 return !VIRTUAL_CheckFlags( (UINT32
)ptr
, 1, VPROT_EXEC
| VPROT_COMMITTED
);
805 /***********************************************************************
806 * IsBadStringPtr32A (KERNEL32.355)
808 BOOL32 WINAPI
IsBadStringPtr32A( LPCSTR str
, UINT32 max
)
813 if (!max
) return FALSE
;
814 if (!(view
= VIRTUAL_FindView( (UINT32
)str
))) return TRUE
;
815 page
= ((UINT32
)str
- view
->base
) >> page_shift
;
816 count
= page_mask
+ 1 - ((UINT32
)str
& page_mask
);
820 if ((view
->prot
[page
] & (VPROT_READ
| VPROT_COMMITTED
)) !=
821 (VPROT_READ
| VPROT_COMMITTED
))
823 if (count
> max
) count
= max
;
825 while (count
--) if (!*str
++) return FALSE
;
826 if (++page
>= view
->size
>> page_shift
) return TRUE
;
827 count
= page_mask
+ 1;
833 /***********************************************************************
834 * IsBadStringPtr32W (KERNEL32.356)
836 BOOL32 WINAPI
IsBadStringPtr32W( LPCWSTR str
, UINT32 max
)
841 if (!max
) return FALSE
;
842 if (!(view
= VIRTUAL_FindView( (UINT32
)str
))) return TRUE
;
843 page
= ((UINT32
)str
- view
->base
) >> page_shift
;
844 count
= (page_mask
+ 1 - ((UINT32
)str
& page_mask
)) / sizeof(WCHAR
);
848 if ((view
->prot
[page
] & (VPROT_READ
| VPROT_COMMITTED
)) !=
849 (VPROT_READ
| VPROT_COMMITTED
))
851 if (count
> max
) count
= max
;
853 while (count
--) if (!*str
++) return FALSE
;
854 if (++page
>= view
->size
>> page_shift
) return TRUE
;
855 count
= (page_mask
+ 1) / sizeof(WCHAR
);
861 /***********************************************************************
862 * CreateFileMapping32A (KERNEL32.46)
864 HANDLE32 WINAPI
CreateFileMapping32A(HFILE32 hFile
, LPSECURITY_ATTRIBUTES attr
,
865 DWORD protect
, DWORD size_high
,
866 DWORD size_low
, LPCSTR name
)
868 FILE_MAPPING
*mapping
= NULL
;
872 /* First search for an object with the same name */
874 K32OBJ
*obj
= K32OBJ_FindName( name
);
877 if (obj
->type
== K32OBJ_MEM_MAPPED_FILE
)
879 SetLastError( ERROR_ALREADY_EXISTS
);
880 handle
= HANDLE_Alloc( obj
, FILE_MAP_ALL_ACCESS
/*FIXME*/, FALSE
);
884 SetLastError( ERROR_DUP_NAME
);
887 K32OBJ_DecCount( obj
);
891 /* Check parameters */
893 dprintf_virtual(stddeb
,"CreateFileMapping32A(%x,%p,%08lx,%08lx%08lx,%s)\n",
894 hFile
, attr
, protect
, size_high
, size_low
, name
);
896 vprot
= VIRTUAL_GetProt( protect
);
897 if (protect
& SEC_RESERVE
)
899 if (hFile
!= INVALID_HANDLE_VALUE32
)
901 SetLastError( ERROR_INVALID_PARAMETER
);
905 else vprot
|= VPROT_COMMITTED
;
906 if (protect
& SEC_NOCACHE
) vprot
|= VPROT_NOCACHE
;
908 /* Compute the size and extend the file if necessary */
910 if (hFile
== INVALID_HANDLE_VALUE32
)
912 if (!size_high
&& !size_low
)
914 SetLastError( ERROR_INVALID_PARAMETER
);
919 else /* We have a file */
921 BY_HANDLE_FILE_INFORMATION info
;
922 DWORD access
= GENERIC_READ
;
924 if (((protect
& 0xff) == PAGE_READWRITE
) ||
925 ((protect
& 0xff) == PAGE_WRITECOPY
) ||
926 ((protect
& 0xff) == PAGE_EXECUTE_READWRITE
) ||
927 ((protect
& 0xff) == PAGE_EXECUTE_WRITECOPY
))
928 access
|= GENERIC_WRITE
;
929 if (!(obj
= HANDLE_GetObjPtr( hFile
, K32OBJ_FILE
, access
)))
932 if (!GetFileInformationByHandle( hFile
, &info
)) goto error
;
933 if (!size_high
&& !size_low
)
935 size_high
= info
.nFileSizeHigh
;
936 size_low
= info
.nFileSizeLow
;
938 else if ((size_high
> info
.nFileSizeHigh
) ||
939 ((size_high
== info
.nFileSizeHigh
) &&
940 (size_low
> info
.nFileSizeLow
)))
942 /* We have to grow the file */
943 if (SetFilePointer( hFile
, size_low
, &size_high
,
944 FILE_BEGIN
) == 0xffffffff) goto error
;
945 if (!SetEndOfFile( hFile
)) goto error
;
949 /* Allocate the mapping object */
951 if (!(mapping
= HeapAlloc( SystemHeap
, 0, sizeof(*mapping
) ))) goto error
;
952 mapping
->header
.type
= K32OBJ_MEM_MAPPED_FILE
;
953 mapping
->header
.refcount
= 1;
954 mapping
->protect
= vprot
;
955 mapping
->size_high
= size_high
;
956 mapping
->size_low
= ROUND_SIZE( 0, size_low
);
957 mapping
->file
= (FILE_OBJECT
*)obj
;
959 if (!K32OBJ_AddName( &mapping
->header
, name
)) handle
= 0;
960 else handle
= HANDLE_Alloc( &mapping
->header
,
961 FILE_MAP_ALL_ACCESS
/*FIXME*/, FALSE
);
962 K32OBJ_DecCount( &mapping
->header
);
966 if (obj
) K32OBJ_DecCount( obj
);
967 if (mapping
) HeapFree( SystemHeap
, 0, mapping
);
972 /***********************************************************************
973 * CreateFileMapping32W (KERNEL32.47)
975 HANDLE32 WINAPI
CreateFileMapping32W(HFILE32 hFile
, LPSECURITY_ATTRIBUTES attr
,
976 DWORD protect
, DWORD size_high
,
977 DWORD size_low
, LPCWSTR name
)
979 LPSTR nameA
= HEAP_strdupWtoA( GetProcessHeap(), 0, name
);
980 HANDLE32 ret
= CreateFileMapping32A( hFile
, attr
, protect
,
981 size_high
, size_low
, nameA
);
982 HeapFree( GetProcessHeap(), 0, nameA
);
987 /***********************************************************************
988 * OpenFileMapping32A (KERNEL32.397)
990 HANDLE32 WINAPI
OpenFileMapping32A( DWORD access
, BOOL32 inherit
, LPCSTR name
)
995 if ((obj
= K32OBJ_FindNameType( name
, K32OBJ_MEM_MAPPED_FILE
)))
997 handle
= HANDLE_Alloc( obj
, access
, inherit
);
998 K32OBJ_DecCount( obj
);
1005 /***********************************************************************
1006 * OpenFileMapping32W (KERNEL32.398)
1008 HANDLE32 WINAPI
OpenFileMapping32W( DWORD access
, BOOL32 inherit
, LPCWSTR name
)
1010 LPSTR nameA
= HEAP_strdupWtoA( GetProcessHeap(), 0, name
);
1011 HANDLE32 ret
= OpenFileMapping32A( access
, inherit
, nameA
);
1012 HeapFree( GetProcessHeap(), 0, nameA
);
1017 /***********************************************************************
1018 * VIRTUAL_DestroyMapping
1020 * Destroy a FILE_MAPPING object.
1022 static void VIRTUAL_DestroyMapping( K32OBJ
*ptr
)
1024 FILE_MAPPING
*mapping
= (FILE_MAPPING
*)ptr
;
1025 assert( ptr
->type
== K32OBJ_MEM_MAPPED_FILE
);
1027 if (mapping
->file
) K32OBJ_DecCount( &mapping
->file
->header
);
1028 ptr
->type
= K32OBJ_UNKNOWN
;
1029 HeapFree( SystemHeap
, 0, mapping
);
1033 /***********************************************************************
1034 * MapViewOfFile (KERNEL32.385)
1036 LPVOID WINAPI
MapViewOfFile( HANDLE32 mapping
, DWORD access
, DWORD offset_high
,
1037 DWORD offset_low
, DWORD count
)
1039 return MapViewOfFileEx( mapping
, access
, offset_high
,
1040 offset_low
, count
, NULL
);
1044 /***********************************************************************
1045 * MapViewOfFileEx (KERNEL32.386)
1047 LPVOID WINAPI
MapViewOfFileEx(HANDLE32 handle
, DWORD access
, DWORD offset_high
,
1048 DWORD offset_low
, DWORD count
, LPVOID addr
)
1050 FILE_MAPPING
*mapping
;
1052 UINT32 ptr
= (UINT32
)-1, size
= 0;
1053 int flags
= MAP_PRIVATE
;
1055 /* Check parameters */
1057 if ((offset_low
& granularity_mask
) ||
1058 (addr
&& ((UINT32
)addr
& granularity_mask
)))
1060 SetLastError( ERROR_INVALID_PARAMETER
);
1064 if (!(mapping
= (FILE_MAPPING
*)HANDLE_GetObjPtr( handle
,
1065 K32OBJ_MEM_MAPPED_FILE
,
1069 if (mapping
->size_high
|| offset_high
)
1070 fprintf( stderr
, "MapViewOfFileEx: offsets larger than 4Gb not supported\n");
1072 if ((offset_low
>= mapping
->size_low
) ||
1073 (count
> mapping
->size_low
- offset_low
))
1075 SetLastError( ERROR_INVALID_PARAMETER
);
1078 if (count
) size
= ROUND_SIZE( offset_low
, count
);
1079 else size
= mapping
->size_low
- offset_low
;
1083 case FILE_MAP_ALL_ACCESS
:
1084 case FILE_MAP_WRITE
:
1085 case FILE_MAP_WRITE
| FILE_MAP_READ
:
1086 if (!(mapping
->protect
& VPROT_WRITE
))
1088 SetLastError( ERROR_INVALID_PARAMETER
);
1095 case FILE_MAP_COPY
| FILE_MAP_READ
:
1096 if (mapping
->protect
& VPROT_READ
) break;
1099 SetLastError( ERROR_INVALID_PARAMETER
);
1105 dprintf_virtual( stddeb
, "MapViewOfFile: handle=%x size=%x offset=%lx\n",
1106 handle
, size
, offset_low
);
1108 ptr
= (UINT32
)FILE_dommap( mapping
->file
, addr
, 0, size
, 0, offset_low
,
1109 VIRTUAL_GetUnixProt( mapping
->protect
),
1111 if (ptr
== (UINT32
)-1)
1113 SetLastError( ERROR_OUTOFMEMORY
);
1117 if (!(view
= VIRTUAL_CreateView( ptr
, size
, offset_low
, 0,
1118 mapping
->protect
, mapping
)))
1120 SetLastError( ERROR_OUTOFMEMORY
);
1126 if (ptr
!= (UINT32
)-1) FILE_munmap( (void *)ptr
, 0, size
);
1127 K32OBJ_DecCount( &mapping
->header
);
1132 /***********************************************************************
1133 * FlushViewOfFile (KERNEL32.262)
1135 BOOL32 WINAPI
FlushViewOfFile( LPCVOID base
, DWORD cbFlush
)
1138 UINT32 addr
= ROUND_ADDR( base
);
1140 dprintf_virtual( stddeb
, "FlushViewOfFile at %p for %ld bytes\n",
1143 if (!(view
= VIRTUAL_FindView( addr
)))
1145 SetLastError( ERROR_INVALID_PARAMETER
);
1148 if (!cbFlush
) cbFlush
= view
->size
;
1149 if (!msync( (void *)addr
, cbFlush
, MS_SYNC
)) return TRUE
;
1150 SetLastError( ERROR_INVALID_PARAMETER
);
1154 /***********************************************************************
1155 * UnmapViewOfFile (KERNEL32.540)
1157 BOOL32 WINAPI
UnmapViewOfFile( LPVOID addr
)
1160 UINT32 base
= ROUND_ADDR( addr
);
1161 if (!(view
= VIRTUAL_FindView( base
)) || (base
!= view
->base
))
1163 SetLastError( ERROR_INVALID_PARAMETER
);
1166 VIRTUAL_DeleteView( view
);