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Release 971221
[wine.git] / memory / virtual.c
blob82d4845a2f1f38e6fd3e68eb3a1043463c35cb17
1 /*
2 * Win32 virtual memory functions
3 *
4 * Copyright 1997 Alexandre Julliard
5 */
6
7 #include <assert.h>
8 #include <fcntl.h>
9 #include <stdio.h>
10 #include <unistd.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <sys/types.h>
14 #include <sys/mman.h>
15 #include "winbase.h"
16 #include "winerror.h"
17 #include "file.h"
18 #include "heap.h"
19 #include "process.h"
20 #include "xmalloc.h"
21 #include "stddebug.h"
22 #include "debug.h"
23
24 #ifndef MS_SYNC
25 #define MS_SYNC 0
26 #endif
27
28 /* File mapping */
29 typedef struct
30 {
31 K32OBJ header;
32 DWORD size_high;
33 DWORD size_low;
34 FILE_OBJECT *file;
35 BYTE protect;
36 } FILE_MAPPING;
37
38 /* File view */
39 typedef struct _FV
40 {
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 */
50 } FILE_VIEW;
51
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
60
61 /* Per-view flags */
62 #define VFLAG_SYSTEM 0x01
63
64 /* Conversion from VPROT_* to Win32 flags */
65 static const BYTE VIRTUAL_Win32Flags[16] =
66 {
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 */
83 };
84
85
86 static FILE_VIEW *VIRTUAL_FirstView;
87
88 static UINT32 page_shift;
89 static UINT32 page_mask;
90 static UINT32 granularity_mask; /* Allocation granularity (usually 64k) */
91
92 #define ROUND_ADDR(addr) \
93 ((UINT32)(addr) & ~page_mask)
94
95 #define ROUND_SIZE(addr,size) \
96 (((UINT32)(size) + ((UINT32)(addr) & page_mask) + page_mask) & ~page_mask)
97
98
99 /***********************************************************************
100 * VIRTUAL_GetProtStr
101 */
102 static const char *VIRTUAL_GetProtStr( BYTE prot )
103 {
104 static char buffer[6];
105 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
106 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
107 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
108 buffer[3] = (prot & VPROT_WRITE) ?
109 ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
110 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
111 buffer[5] = 0;
112 return buffer;
113 }
114
115
116 /***********************************************************************
117 * VIRTUAL_DumpView
118 */
119 static void VIRTUAL_DumpView( FILE_VIEW *view )
120 {
121 UINT32 i, count;
122 UINT32 addr = view->base;
123 BYTE prot = view->prot[0];
124
125 dprintf_virtual( stddeb, "View: %08x - %08x%s",
126 view->base, view->base + view->size - 1,
127 (view->flags & VFLAG_SYSTEM) ? " (system)" : "" );
128 if (view->mapping && view->mapping->file)
129 dprintf_virtual( stddeb, " %s @ %08x\n",
130 view->mapping->file->unix_name, view->offset );
131 else
132 dprintf_virtual( stddeb, " (anonymous)\n");
133
134 for (count = i = 1; i < view->size >> page_shift; i++, count++)
135 {
136 if (view->prot[i] == prot) continue;
137 dprintf_virtual( stddeb, " %08x - %08x %s\n",
138 addr, addr + (count << page_shift) - 1,
139 VIRTUAL_GetProtStr(prot) );
140 addr += (count << page_shift);
141 prot = view->prot[i];
142 count = 0;
143 }
144 if (count)
145 dprintf_virtual( stddeb, " %08x - %08x %s\n",
146 addr, addr + (count << page_shift) - 1,
147 VIRTUAL_GetProtStr(prot) );
148 }
149
150
151 /***********************************************************************
152 * VIRTUAL_Dump
153 */
154 void VIRTUAL_Dump(void)
155 {
156 FILE_VIEW *view = VIRTUAL_FirstView;
157 dprintf_virtual( stddeb, "\nDump of all virtual memory views:\n\n" );
158 while (view)
159 {
160 VIRTUAL_DumpView( view );
161 view = view->next;
162 }
163 }
164
165
166 /***********************************************************************
167 * VIRTUAL_FindView
168 *
169 * Find the view containing a given address.
170 */
171 static FILE_VIEW *VIRTUAL_FindView( UINT32 addr )
172 {
173 FILE_VIEW *view = VIRTUAL_FirstView;
174 while (view)
175 {
176 if (view->base > addr) return NULL;
177 if (view->base + view->size > addr) return view;
178 view = view->next;
179 }
180 return NULL;
181 }
182
183
184 /***********************************************************************
185 * VIRTUAL_CreateView
186 *
187 * Create a new view and add it in the linked list.
188 */
189 static FILE_VIEW *VIRTUAL_CreateView( UINT32 base, UINT32 size, UINT32 offset,
190 UINT32 flags, BYTE vprot,
191 FILE_MAPPING *mapping )
192 {
193 FILE_VIEW *view, *prev;
194
195 /* Create the view structure */
196
197 assert( !(base & page_mask) );
198 assert( !(size & page_mask) );
199 size >>= page_shift;
200 if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
201 view->base = base;
202 view->size = size << page_shift;
203 view->flags = flags;
204 view->offset = offset;
205 view->mapping = mapping;
206 view->protect = vprot;
207 memset( view->prot, vprot, size );
208
209 /* Insert it in the linked list */
210
211 if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
212 {
213 view->next = VIRTUAL_FirstView;
214 view->prev = NULL;
215 if (view->next) view->next->prev = view;
216 VIRTUAL_FirstView = view;
217 }
218 else
219 {
220 prev = VIRTUAL_FirstView;
221 while (prev->next && (prev->next->base < base)) prev = prev->next;
222 view->next = prev->next;
223 view->prev = prev;
224 if (view->next) view->next->prev = view;
225 prev->next = view;
226 }
227 if (debugging_virtual) VIRTUAL_DumpView( view );
228 return view;
229 }
230
231
232 /***********************************************************************
233 * VIRTUAL_DeleteView
234 *
235 * Delete an view.
236 */
237 static void VIRTUAL_DeleteView( FILE_VIEW *view )
238 {
239 FILE_munmap( (void *)view->base, 0, view->size );
240 if (view->next) view->next->prev = view->prev;
241 if (view->prev) view->prev->next = view->next;
242 else VIRTUAL_FirstView = view->next;
243 if (view->mapping) K32OBJ_DecCount( &view->mapping->header );
244 free( view );
245 }
246
247
248 /***********************************************************************
249 * VIRTUAL_GetUnixProt
250 *
251 * Convert page protections to protection for mmap/mprotect.
252 */
253 static int VIRTUAL_GetUnixProt( BYTE vprot )
254 {
255 int prot = 0;
256 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
257 {
258 if (vprot & VPROT_READ) prot |= PROT_READ;
259 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
260 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
261 }
262 return prot;
263 }
264
265
266 /***********************************************************************
267 * VIRTUAL_GetWin32Prot
268 *
269 * Convert page protections to Win32 flags.
270 */
271 static void VIRTUAL_GetWin32Prot( BYTE vprot, DWORD *protect, DWORD *state )
272 {
273 *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
274 if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;
275 if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
276
277 if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
278 }
279
280
281 /***********************************************************************
282 * VIRTUAL_GetProt
283 *
284 * Build page protections from Win32 flags.
285 */
286 static BYTE VIRTUAL_GetProt( DWORD protect )
287 {
288 BYTE vprot;
289
290 switch(protect & 0xff)
291 {
292 case PAGE_READONLY:
293 vprot = VPROT_READ;
294 break;
295 case PAGE_READWRITE:
296 vprot = VPROT_READ | VPROT_WRITE;
297 break;
298 case PAGE_WRITECOPY:
299 vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
300 break;
301 case PAGE_EXECUTE:
302 vprot = VPROT_EXEC;
303 break;
304 case PAGE_EXECUTE_READ:
305 vprot = VPROT_EXEC | VPROT_READ;
306 break;
307 case PAGE_EXECUTE_READWRITE:
308 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
309 break;
310 case PAGE_EXECUTE_WRITECOPY:
311 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
312 break;
313 case PAGE_NOACCESS:
314 default:
315 vprot = 0;
316 break;
317 }
318 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
319 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
320 return vprot;
321 }
322
323
324 /***********************************************************************
325 * VIRTUAL_SetProt
326 *
327 * Change the protection of a range of pages.
328 */
329 static BOOL32 VIRTUAL_SetProt( FILE_VIEW *view, UINT32 base,
330 UINT32 size, BYTE vprot )
331 {
332 dprintf_virtual( stddeb, "VIRTUAL_SetProt: %08x-%08x %s\n",
333 base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
334
335 if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
336 return FALSE; /* FIXME: last error */
337
338 memset( view->prot + ((base - view->base) >> page_shift),
339 vprot, size >> page_shift );
340 if (debugging_virtual) VIRTUAL_DumpView( view );
341 return TRUE;
342 }
343
344
345 /***********************************************************************
346 * VIRTUAL_CheckFlags
347 *
348 * Check that all pages in a range have the given flags.
349 */
350 static BOOL32 VIRTUAL_CheckFlags( UINT32 base, UINT32 size, BYTE flags )
351 {
352 FILE_VIEW *view;
353 UINT32 page;
354
355 if (!size) return TRUE;
356 if (!(view = VIRTUAL_FindView( base ))) return FALSE;
357 if (view->base + view->size < base + size) return FALSE;
358 page = (base - view->base) >> page_shift;
359 size = ROUND_SIZE( base, size ) >> page_shift;
360 while (size--) if ((view->prot[page++] & flags) != flags) return FALSE;
361 return TRUE;
362 }
363
364
365 /***********************************************************************
366 * VIRTUAL_Init
367 */
368 BOOL32 VIRTUAL_Init(void)
369 {
370 SYSTEM_INFO sysinfo;
371 GetSystemInfo( &sysinfo );
372
373 page_mask = sysinfo.dwPageSize - 1;
374 granularity_mask = sysinfo.dwAllocationGranularity - 1;
375 /* Make sure we have a power of 2 */
376 assert( !(sysinfo.dwPageSize & page_mask) );
377 assert( !(sysinfo.dwAllocationGranularity & granularity_mask) );
378 page_shift = 0;
379 while ((1 << page_shift) != sysinfo.dwPageSize) page_shift++;
380
381 #ifdef linux
382 {
383 /* Do not use stdio here since it may temporarily change the size
384 * of some segments (ie libc6 adds 0x1000 per open FILE)
385 */
386 int fd = open ("/proc/self/maps", O_RDONLY);
387 if (fd >= 0)
388 {
389 char buffer[80];
390
391 for (;;)
392 {
393 int start, end, offset;
394 char r, w, x, p;
395 BYTE vprot = VPROT_COMMITTED;
396
397 char * ptr = buffer;
398 int count = sizeof(buffer);
399 while (1 == read(fd, ptr, 1) && *ptr != '\n' && --count > 0)
400 ptr++;
401
402 if (*ptr != '\n') break;
403 *ptr = '\0';
404
405 sscanf( buffer, "%x-%x %c%c%c%c %x",
406 &start, &end, &r, &w, &x, &p, &offset );
407 if (r == 'r') vprot |= VPROT_READ;
408 if (w == 'w') vprot |= VPROT_WRITE;
409 if (x == 'x') vprot |= VPROT_EXEC;
410 if (p == 'p') vprot |= VPROT_WRITECOPY;
411 VIRTUAL_CreateView( start, end - start, 0,
412 VFLAG_SYSTEM, vprot, NULL );
413 }
414 close (fd);
415 }
416 }
417 #endif /* linux */
418 return TRUE;
419 }
420
421
422 /***********************************************************************
423 * VirtualAlloc (KERNEL32.548)
424 */
425 LPVOID WINAPI VirtualAlloc( LPVOID addr, DWORD size, DWORD type, DWORD protect)
426 {
427 FILE_VIEW *view;
428 UINT32 base, ptr, view_size;
429 BYTE vprot;
430
431 dprintf_virtual( stddeb, "VirtualAlloc: %08x %08lx %lx %08lx\n",
432 (UINT32)addr, size, type, protect );
433
434 /* Round parameters to a page boundary */
435
436 if (size > 0x7fc00000) /* 2Gb - 4Mb */
437 {
438 SetLastError( ERROR_OUTOFMEMORY );
439 return NULL;
440 }
441 if (addr)
442 {
443 if (type & MEM_RESERVE) /* Round down to 64k boundary */
444 base = ((UINT32)addr + granularity_mask) & ~granularity_mask;
445 else
446 base = ROUND_ADDR( addr );
447 size = (((UINT32)addr + size + page_mask) & ~page_mask) - base;
448 if (base + size < base) /* Disallow wrap-around */
449 {
450 SetLastError( ERROR_INVALID_PARAMETER );
451 return NULL;
452 }
453 }
454 else
455 {
456 base = 0;
457 size = (size + page_mask) & ~page_mask;
458 }
459
460 /* Compute the protection flags */
461
462 if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
463 (type & ~(MEM_COMMIT | MEM_RESERVE)))
464 {
465 SetLastError( ERROR_INVALID_PARAMETER );
466 return NULL;
467 }
468 if (type & MEM_COMMIT)
469 vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
470 else vprot = 0;
471
472 /* Reserve the memory */
473
474 if ((type & MEM_RESERVE) || !base)
475 {
476 view_size = size + (base ? 0 : granularity_mask + 1);
477 ptr = (UINT32)FILE_dommap( NULL, (LPVOID)base, 0, view_size, 0, 0,
478 VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE );
479 if (ptr == (UINT32)-1)
480 {
481 SetLastError( ERROR_OUTOFMEMORY );
482 return NULL;
483 }
484 if (!base)
485 {
486 /* Release the extra memory while keeping the range */
487 /* starting on a 64k boundary. */
488
489 if (ptr & granularity_mask)
490 {
491 UINT32 extra = granularity_mask + 1 - (ptr & granularity_mask);
492 FILE_munmap( (void *)ptr, 0, extra );
493 ptr += extra;
494 view_size -= extra;
495 }
496 if (view_size > size)
497 FILE_munmap( (void *)(ptr + size), 0, view_size - size );
498 }
499 else if (ptr != base)
500 {
501 /* We couldn't get the address we wanted */
502 FILE_munmap( (void *)ptr, 0, view_size );
503 SetLastError( ERROR_INVALID_ADDRESS );
504 return NULL;
505 }
506 if (!(view = VIRTUAL_CreateView( ptr, size, 0, 0, vprot, NULL )))
507 {
508 FILE_munmap( (void *)ptr, 0, size );
509 SetLastError( ERROR_OUTOFMEMORY );
510 return NULL;
511 }
512 if (debugging_virtual) VIRTUAL_DumpView( view );
513 return (LPVOID)ptr;
514 }
515
516 /* Commit the pages */
517
518 if (!(view = VIRTUAL_FindView( base )) ||
519 (base + size > view->base + view->size))
520 {
521 SetLastError( ERROR_INVALID_PARAMETER );
522 return NULL;
523 }
524
525 if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
526 return (LPVOID)base;
527 }
528
529
530 /***********************************************************************
531 * VirtualFree (KERNEL32.550)
532 */
533 BOOL32 WINAPI VirtualFree( LPVOID addr, DWORD size, DWORD type )
534 {
535 FILE_VIEW *view;
536 UINT32 base;
537
538 dprintf_virtual( stddeb, "VirtualFree: %08x %08lx %lx\n",
539 (UINT32)addr, size, type );
540
541 /* Fix the parameters */
542
543 size = ROUND_SIZE( addr, size );
544 base = ROUND_ADDR( addr );
545
546 if (!(view = VIRTUAL_FindView( base )) ||
547 (base + size > view->base + view->size))
548 {
549 SetLastError( ERROR_INVALID_PARAMETER );
550 return FALSE;
551 }
552
553 /* Compute the protection flags */
554
555 if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
556 {
557 SetLastError( ERROR_INVALID_PARAMETER );
558 return FALSE;
559 }
560
561 /* Free the pages */
562
563 if (type == MEM_RELEASE)
564 {
565 if (size || (base != view->base))
566 {
567 SetLastError( ERROR_INVALID_PARAMETER );
568 return FALSE;
569 }
570 VIRTUAL_DeleteView( view );
571 return TRUE;
572 }
573
574 /* Decommit the pages */
575
576 return VIRTUAL_SetProt( view, base, size, 0 );
577 }
578
579
580 /***********************************************************************
581 * VirtualLock (KERNEL32.551)
582 */
583 BOOL32 WINAPI VirtualLock( LPVOID addr, DWORD size )
584 {
585 return TRUE;
586 }
587
588
589 /***********************************************************************
590 * VirtualUnlock (KERNEL32.556)
591 */
592 BOOL32 WINAPI VirtualUnlock( LPVOID addr, DWORD size )
593 {
594 return TRUE;
595 }
596
597
598 /***********************************************************************
599 * VirtualProtect (KERNEL32.552)
600 */
601 BOOL32 WINAPI VirtualProtect( LPVOID addr, DWORD size, DWORD new_prot,
602 LPDWORD old_prot )
603 {
604 FILE_VIEW *view;
605 UINT32 base, i;
606 BYTE vprot, *p;
607
608 dprintf_virtual( stddeb, "VirtualProtect: %08x %08lx %08lx\n",
609 (UINT32)addr, size, new_prot );
610
611 /* Fix the parameters */
612
613 size = ROUND_SIZE( addr, size );
614 base = ROUND_ADDR( addr );
615
616 if (!(view = VIRTUAL_FindView( base )) ||
617 (base + size > view->base + view->size))
618 {
619 SetLastError( ERROR_INVALID_PARAMETER );
620 return FALSE;
621 }
622
623 /* Make sure all the pages are committed */
624
625 p = view->prot + ((base - view->base) >> page_shift);
626 for (i = size >> page_shift; i; i--, p++)
627 {
628 if (!(*p & VPROT_COMMITTED))
629 {
630 SetLastError( ERROR_INVALID_PARAMETER );
631 return FALSE;
632 }
633 }
634
635 VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL );
636 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
637 return VIRTUAL_SetProt( view, base, size, vprot );
638 }
639
640
641 /***********************************************************************
642 * VirtualProtectEx (KERNEL32.553)
643 */
644 BOOL32 WINAPI VirtualProtectEx( HANDLE32 handle, LPVOID addr, DWORD size,
645 DWORD new_prot, LPDWORD old_prot )
646 {
647 BOOL32 ret = FALSE;
648
649 PDB32 *pdb = (PDB32 *)PROCESS_GetObjPtr( handle, K32OBJ_PROCESS );
650 if (pdb)
651 {
652 if (pdb == pCurrentProcess)
653 ret = VirtualProtect( addr, size, new_prot, old_prot );
654 else
655 fprintf(stderr,"Unsupported: VirtualProtectEx on other process\n");
656 K32OBJ_DecCount( &pdb->header );
657 }
658 return ret;
659 }
660
661
662 /***********************************************************************
663 * VirtualQuery (KERNEL32.554)
664 */
665 BOOL32 WINAPI VirtualQuery( LPCVOID addr, LPMEMORY_BASIC_INFORMATION info,
666 DWORD len )
667 {
668 FILE_VIEW *view = VIRTUAL_FirstView;
669 UINT32 base = ROUND_ADDR( addr );
670 UINT32 alloc_base = 0;
671 UINT32 size = 0;
672
673 /* Find the view containing the address */
674
675 for (;;)
676 {
677 if (!view)
678 {
679 size = 0xffff0000 - alloc_base;
680 break;
681 }
682 if (view->base > base)
683 {
684 size = view->base - alloc_base;
685 view = NULL;
686 break;
687 }
688 if (view->base + view->size > base)
689 {
690 alloc_base = view->base;
691 size = view->size;
692 break;
693 }
694 alloc_base = view->base + view->size;
695 view = view->next;
696 }
697
698 /* Fill the info structure */
699
700 if (!view)
701 {
702 info->State = MEM_FREE;
703 info->Protect = 0;
704 info->AllocationProtect = 0;
705 info->Type = 0;
706 }
707 else
708 {
709 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
710 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
711 for (size = base - alloc_base; size < view->size; size += page_mask+1)
712 if (view->prot[size >> page_shift] != vprot) break;
713 info->AllocationProtect = view->protect;
714 info->Type = MEM_PRIVATE; /* FIXME */
715 }
716
717 info->BaseAddress = (LPVOID)base;
718 info->AllocationBase = (LPVOID)alloc_base;
719 info->RegionSize = size - (base - alloc_base);
720 return TRUE;
721 }
722
723
724 /***********************************************************************
725 * VirtualQueryEx (KERNEL32.555)
726 */
727 BOOL32 WINAPI VirtualQueryEx( HANDLE32 handle, LPCVOID addr,
728 LPMEMORY_BASIC_INFORMATION info, DWORD len )
729 {
730 BOOL32 ret = FALSE;
731
732 PDB32 *pdb = (PDB32 *)PROCESS_GetObjPtr( handle, K32OBJ_PROCESS );
733 if (pdb)
734 {
735 if (pdb == pCurrentProcess)
736 ret = VirtualQuery( addr, info, len );
737 else
738 fprintf(stderr,"Unsupported: VirtualQueryEx on other process\n");
739 K32OBJ_DecCount( &pdb->header );
740 }
741 return ret;
742 }
743
744
745 /***********************************************************************
746 * IsBadReadPtr32 (KERNEL32.354)
747 */
748 BOOL32 WINAPI IsBadReadPtr32( LPCVOID ptr, UINT32 size )
749 {
750 return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
751 VPROT_READ | VPROT_COMMITTED );
752 }
753
754
755 /***********************************************************************
756 * IsBadWritePtr32 (KERNEL32.357)
757 */
758 BOOL32 WINAPI IsBadWritePtr32( LPVOID ptr, UINT32 size )
759 {
760 return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
761 VPROT_WRITE | VPROT_COMMITTED );
762 }
763
764
765 /***********************************************************************
766 * IsBadHugeReadPtr32 (KERNEL32.352)
767 */
768 BOOL32 WINAPI IsBadHugeReadPtr32( LPCVOID ptr, UINT32 size )
769 {
770 return IsBadReadPtr32( ptr, size );
771 }
772
773
774 /***********************************************************************
775 * IsBadHugeWritePtr32 (KERNEL32.353)
776 */
777 BOOL32 WINAPI IsBadHugeWritePtr32( LPVOID ptr, UINT32 size )
778 {
779 return IsBadWritePtr32( ptr, size );
780 }
781
782
783 /***********************************************************************
784 * IsBadCodePtr32 (KERNEL32.351)
785 */
786 BOOL32 WINAPI IsBadCodePtr32( FARPROC32 ptr )
787 {
788 return !VIRTUAL_CheckFlags( (UINT32)ptr, 1, VPROT_EXEC | VPROT_COMMITTED );
789 }
790
791
792 /***********************************************************************
793 * IsBadStringPtr32A (KERNEL32.355)
794 */
795 BOOL32 WINAPI IsBadStringPtr32A( LPCSTR str, UINT32 max )
796 {
797 FILE_VIEW *view;
798 UINT32 page, count;
799
800 if (!max) return FALSE;
801 if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
802 page = ((UINT32)str - view->base) >> page_shift;
803 count = page_mask + 1 - ((UINT32)str & page_mask);
804
805 while (max)
806 {
807 if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
808 (VPROT_READ | VPROT_COMMITTED))
809 return TRUE;
810 if (count > max) count = max;
811 max -= count;
812 while (count--) if (!*str++) return FALSE;
813 if (++page >= view->size >> page_shift) return TRUE;
814 count = page_mask + 1;
815 }
816 return FALSE;
817 }
818
819
820 /***********************************************************************
821 * IsBadStringPtr32W (KERNEL32.356)
822 */
823 BOOL32 WINAPI IsBadStringPtr32W( LPCWSTR str, UINT32 max )
824 {
825 FILE_VIEW *view;
826 UINT32 page, count;
827
828 if (!max) return FALSE;
829 if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE;
830 page = ((UINT32)str - view->base) >> page_shift;
831 count = (page_mask + 1 - ((UINT32)str & page_mask)) / sizeof(WCHAR);
832
833 while (max)
834 {
835 if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
836 (VPROT_READ | VPROT_COMMITTED))
837 return TRUE;
838 if (count > max) count = max;
839 max -= count;
840 while (count--) if (!*str++) return FALSE;
841 if (++page >= view->size >> page_shift) return TRUE;
842 count = (page_mask + 1) / sizeof(WCHAR);
843 }
844 return FALSE;
845 }
846
847
848 /***********************************************************************
849 * CreateFileMapping32A (KERNEL32.46)
850 */
851 HANDLE32 WINAPI CreateFileMapping32A(HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
852 DWORD protect, DWORD size_high,
853 DWORD size_low, LPCSTR name )
854 {
855 FILE_MAPPING *mapping = NULL;
856 HANDLE32 handle;
857 BYTE vprot;
858
859 /* First search for an object with the same name */
860
861 K32OBJ *obj = K32OBJ_FindName( name );
862 if (obj)
863 {
864 if (obj->type == K32OBJ_MEM_MAPPED_FILE)
865 {
866 SetLastError( ERROR_ALREADY_EXISTS );
867 return PROCESS_AllocHandle( obj, 0 );
868 }
869 SetLastError( ERROR_DUP_NAME );
870 return 0;
871 }
872
873 /* Check parameters */
874
875 dprintf_virtual(stddeb,"CreateFileMapping32A(%x,%p,%08lx,%08lx%08lx,%s)\n",
876 hFile, attr, protect, size_high, size_low, name );
877
878 vprot = VIRTUAL_GetProt( protect );
879 if (protect & SEC_RESERVE)
880 {
881 if (hFile != INVALID_HANDLE_VALUE32)
882 {
883 SetLastError( ERROR_INVALID_PARAMETER );
884 return 0;
885 }
886 }
887 else vprot |= VPROT_COMMITTED;
888 if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
889
890 /* Compute the size and extend the file if necessary */
891
892 if (hFile == INVALID_HANDLE_VALUE32)
893 {
894 if (!size_high && !size_low)
895 {
896 SetLastError( ERROR_INVALID_PARAMETER );
897 return 0;
898 }
899 obj = NULL;
900 }
901 else /* We have a file */
902 {
903 BY_HANDLE_FILE_INFORMATION info;
904 if (!(obj = PROCESS_GetObjPtr( hFile, K32OBJ_FILE ))) goto error;
905 /* FIXME: should check if the file permissions agree
906 * with the required protection flags */
907 if (!GetFileInformationByHandle( hFile, &info )) goto error;
908 if (!size_high && !size_low)
909 {
910 size_high = info.nFileSizeHigh;
911 size_low = info.nFileSizeLow;
912 }
913 else if ((size_high > info.nFileSizeHigh) ||
914 ((size_high == info.nFileSizeHigh) &&
915 (size_low > info.nFileSizeLow)))
916 {
917 /* We have to grow the file */
918 if (SetFilePointer( hFile, size_low, &size_high,
919 FILE_BEGIN ) == 0xffffffff) goto error;
920 if (!SetEndOfFile( hFile )) goto error;
921 }
922 }
923
924 /* Allocate the mapping object */
925
926 if (!(mapping = HeapAlloc( SystemHeap, 0, sizeof(*mapping) ))) goto error;
927 mapping->header.type = K32OBJ_MEM_MAPPED_FILE;
928 mapping->header.refcount = 1;
929 mapping->protect = vprot;
930 mapping->size_high = size_high;
931 mapping->size_low = ROUND_SIZE( 0, size_low );
932 mapping->file = (FILE_OBJECT *)obj;
933
934 handle = PROCESS_AllocHandle( &mapping->header, 0 );
935 if (handle != INVALID_HANDLE_VALUE32) return handle;
936
937 error:
938 if (obj) K32OBJ_DecCount( obj );
939 if (mapping) HeapFree( SystemHeap, 0, mapping );
940 return 0;
941 }
942
943
944 /***********************************************************************
945 * CreateFileMapping32W (KERNEL32.47)
946 */
947 HANDLE32 WINAPI CreateFileMapping32W(HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
948 DWORD protect, DWORD size_high,
949 DWORD size_low, LPCWSTR name )
950 {
951 LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
952 HANDLE32 ret = CreateFileMapping32A( hFile, attr, protect,
953 size_high, size_low, nameA );
954 HeapFree( GetProcessHeap(), 0, nameA );
955 return ret;
956 }
957
958
959 /***********************************************************************
960 * OpenFileMapping32A (KERNEL32.397)
961 */
962 HANDLE32 WINAPI OpenFileMapping32A( DWORD access, BOOL32 inherit, LPCSTR name )
963 {
964 K32OBJ *obj = K32OBJ_FindNameType( name, K32OBJ_MEM_MAPPED_FILE );
965 if (!obj) return 0;
966 return PROCESS_AllocHandle( obj, 0 );
967 }
968
969
970 /***********************************************************************
971 * OpenFileMapping32W (KERNEL32.398)
972 */
973 HANDLE32 WINAPI OpenFileMapping32W( DWORD access, BOOL32 inherit, LPCWSTR name)
974 {
975 LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
976 HANDLE32 ret = OpenFileMapping32A( access, inherit, nameA );
977 HeapFree( GetProcessHeap(), 0, nameA );
978 return ret;
979 }
980
981
982 /***********************************************************************
983 * VIRTUAL_DestroyMapping
984 *
985 * Destroy a FILE_MAPPING object.
986 */
987 void VIRTUAL_DestroyMapping( K32OBJ *ptr )
988 {
989 FILE_MAPPING *mapping = (FILE_MAPPING *)ptr;
990 assert( ptr->type == K32OBJ_MEM_MAPPED_FILE );
991
992 if (mapping->file) K32OBJ_DecCount( &mapping->file->header );
993 ptr->type = K32OBJ_UNKNOWN;
994 HeapFree( SystemHeap, 0, mapping );
995 }
996
997
998 /***********************************************************************
999 * MapViewOfFile (KERNEL32.385)
1000 */
1001 LPVOID WINAPI MapViewOfFile( HANDLE32 mapping, DWORD access, DWORD offset_high,
1002 DWORD offset_low, DWORD count )
1003 {
1004 return MapViewOfFileEx( mapping, access, offset_high,
1005 offset_low, count, NULL );
1006 }
1007
1008
1009 /***********************************************************************
1010 * MapViewOfFileEx (KERNEL32.386)
1011 */
1012 LPVOID WINAPI MapViewOfFileEx(HANDLE32 handle, DWORD access, DWORD offset_high,
1013 DWORD offset_low, DWORD count, LPVOID addr )
1014 {
1015 FILE_MAPPING *mapping;
1016 FILE_VIEW *view;
1017 UINT32 ptr = (UINT32)-1, size = 0;
1018 int flags = MAP_PRIVATE;
1019
1020 /* Check parameters */
1021
1022 if ((offset_low & granularity_mask) ||
1023 (addr && ((UINT32)addr & granularity_mask)))
1024 {
1025 SetLastError( ERROR_INVALID_PARAMETER );
1026 return NULL;
1027 }
1028
1029 if (!(mapping = (FILE_MAPPING *)PROCESS_GetObjPtr( handle,
1030 K32OBJ_MEM_MAPPED_FILE )))
1031 return NULL;
1032
1033 if (mapping->size_high || offset_high)
1034 fprintf( stderr, "MapViewOfFileEx: offsets larger than 4Gb not supported\n");
1035
1036 if ((offset_low >= mapping->size_low) ||
1037 (count > mapping->size_low - offset_low))
1038 {
1039 SetLastError( ERROR_INVALID_PARAMETER );
1040 goto error;
1041 }
1042 if (count) size = ROUND_SIZE( offset_low, count );
1043 else size = mapping->size_low - offset_low;
1044
1045 switch(access)
1046 {
1047 case FILE_MAP_ALL_ACCESS:
1048 case FILE_MAP_WRITE:
1049 case FILE_MAP_WRITE | FILE_MAP_READ:
1050 if (!(mapping->protect & VPROT_WRITE))
1051 {
1052 SetLastError( ERROR_INVALID_PARAMETER );
1053 goto error;
1054 }
1055 flags = MAP_SHARED;
1056 /* fall through */
1057 case FILE_MAP_READ:
1058 case FILE_MAP_COPY:
1059 case FILE_MAP_COPY | FILE_MAP_READ:
1060 if (mapping->protect & VPROT_READ) break;
1061 /* fall through */
1062 default:
1063 SetLastError( ERROR_INVALID_PARAMETER );
1064 goto error;
1065 }
1066
1067 /* Map the file */
1068
1069 dprintf_virtual( stddeb, "MapViewOfFile: handle=%x size=%x offset=%lx\n",
1070 handle, size, offset_low );
1071
1072 ptr = (UINT32)FILE_dommap( mapping->file, addr, 0, size, 0, offset_low,
1073 VIRTUAL_GetUnixProt( mapping->protect ),
1074 flags );
1075 if (ptr == (UINT32)-1)
1076 {
1077 SetLastError( ERROR_OUTOFMEMORY );
1078 goto error;
1079 }
1080
1081 if (!(view = VIRTUAL_CreateView( ptr, size, offset_low, 0,
1082 mapping->protect, mapping )))
1083 {
1084 SetLastError( ERROR_OUTOFMEMORY );
1085 goto error;
1086 }
1087 return (LPVOID)ptr;
1088
1089 error:
1090 if (ptr != (UINT32)-1) FILE_munmap( (void *)ptr, 0, size );
1091 K32OBJ_DecCount( &mapping->header );
1092 return NULL;
1093 }
1094
1095
1096 /***********************************************************************
1097 * FlushViewOfFile (KERNEL32.262)
1098 */
1099 BOOL32 WINAPI FlushViewOfFile( LPCVOID base, DWORD cbFlush )
1100 {
1101 FILE_VIEW *view;
1102 UINT32 addr = ROUND_ADDR( base );
1103
1104 dprintf_virtual( stddeb, "FlushViewOfFile at %p for %ld bytes\n",
1105 base, cbFlush );
1106
1107 if (!(view = VIRTUAL_FindView( addr )))
1108 {
1109 SetLastError( ERROR_INVALID_PARAMETER );
1110 return FALSE;
1111 }
1112 if (!cbFlush) cbFlush = view->size;
1113 if (!msync( (void *)addr, cbFlush, MS_SYNC )) return TRUE;
1114 SetLastError( ERROR_INVALID_PARAMETER );
1115 return FALSE;
1116
1117 }
1118 /***********************************************************************
1119 * UnmapViewOfFile (KERNEL32.540)
1120 */
1121 BOOL32 WINAPI UnmapViewOfFile( LPVOID addr )
1122 {
1123 FILE_VIEW *view;
1124 UINT32 base = ROUND_ADDR( addr );
1125 if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1126 {
1127 SetLastError( ERROR_INVALID_PARAMETER );
1128 return FALSE;
1129 }
1130 VIRTUAL_DeleteView( view );
1131 return TRUE;
1132 }
Windows API implementation