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Release 980201
[wine.git] / memory / virtual.c
blobbc757623f8bb30c9c7b15b75f54de4d35cc0c4a7
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 static void VIRTUAL_DestroyMapping( K32OBJ *obj );
99
100 const K32OBJ_OPS MEM_MAPPED_FILE_Ops =
101 {
102 /* Object cannot be waited upon, so we don't need these (except destroy) */
103 NULL, /* signaled */
104 NULL, /* satisfied */
105 NULL, /* add_wait */
106 NULL, /* remove_wait */
107 VIRTUAL_DestroyMapping /* destroy */
108 };
109
110 /***********************************************************************
111 * VIRTUAL_GetProtStr
112 */
113 static const char *VIRTUAL_GetProtStr( BYTE prot )
114 {
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' : '-';
122 buffer[5] = 0;
123 return buffer;
124 }
125
126
127 /***********************************************************************
128 * VIRTUAL_DumpView
129 */
130 static void VIRTUAL_DumpView( FILE_VIEW *view )
131 {
132 UINT32 i, count;
133 UINT32 addr = view->base;
134 BYTE prot = view->prot[0];
135
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 );
142 else
143 dprintf_virtual( stddeb, " (anonymous)\n");
144
145 for (count = i = 1; i < view->size >> page_shift; i++, count++)
146 {
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];
153 count = 0;
154 }
155 if (count)
156 dprintf_virtual( stddeb, " %08x - %08x %s\n",
157 addr, addr + (count << page_shift) - 1,
158 VIRTUAL_GetProtStr(prot) );
159 }
160
161
162 /***********************************************************************
163 * VIRTUAL_Dump
164 */
165 void VIRTUAL_Dump(void)
166 {
167 FILE_VIEW *view = VIRTUAL_FirstView;
168 dprintf_virtual( stddeb, "\nDump of all virtual memory views:\n\n" );
169 while (view)
170 {
171 VIRTUAL_DumpView( view );
172 view = view->next;
173 }
174 }
175
176
177 /***********************************************************************
178 * VIRTUAL_FindView
179 *
180 * Find the view containing a given address.
181 */
182 static FILE_VIEW *VIRTUAL_FindView( UINT32 addr )
183 {
184 FILE_VIEW *view = VIRTUAL_FirstView;
185 while (view)
186 {
187 if (view->base > addr) return NULL;
188 if (view->base + view->size > addr) return view;
189 view = view->next;
190 }
191 return NULL;
192 }
193
194
195 /***********************************************************************
196 * VIRTUAL_CreateView
197 *
198 * Create a new view and add it in the linked list.
199 */
200 static FILE_VIEW *VIRTUAL_CreateView( UINT32 base, UINT32 size, UINT32 offset,
201 UINT32 flags, BYTE vprot,
202 FILE_MAPPING *mapping )
203 {
204 FILE_VIEW *view, *prev;
205
206 /* Create the view structure */
207
208 assert( !(base & page_mask) );
209 assert( !(size & page_mask) );
210 size >>= page_shift;
211 if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
212 view->base = base;
213 view->size = size << page_shift;
214 view->flags = flags;
215 view->offset = offset;
216 view->mapping = mapping;
217 view->protect = vprot;
218 memset( view->prot, vprot, size );
219
220 /* Insert it in the linked list */
221
222 if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
223 {
224 view->next = VIRTUAL_FirstView;
225 view->prev = NULL;
226 if (view->next) view->next->prev = view;
227 VIRTUAL_FirstView = view;
228 }
229 else
230 {
231 prev = VIRTUAL_FirstView;
232 while (prev->next && (prev->next->base < base)) prev = prev->next;
233 view->next = prev->next;
234 view->prev = prev;
235 if (view->next) view->next->prev = view;
236 prev->next = view;
237 }
238 if (debugging_virtual) VIRTUAL_DumpView( view );
239 return view;
240 }
241
242
243 /***********************************************************************
244 * VIRTUAL_DeleteView
245 *
246 * Delete an view.
247 */
248 static void VIRTUAL_DeleteView( FILE_VIEW *view )
249 {
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 );
255 free( view );
256 }
257
258
259 /***********************************************************************
260 * VIRTUAL_GetUnixProt
261 *
262 * Convert page protections to protection for mmap/mprotect.
263 */
264 static int VIRTUAL_GetUnixProt( BYTE vprot )
265 {
266 int prot = 0;
267 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
268 {
269 if (vprot & VPROT_READ) prot |= PROT_READ;
270 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
271 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
272 }
273 return prot;
274 }
275
276
277 /***********************************************************************
278 * VIRTUAL_GetWin32Prot
279 *
280 * Convert page protections to Win32 flags.
281 */
282 static void VIRTUAL_GetWin32Prot( BYTE vprot, DWORD *protect, DWORD *state )
283 {
284 if (protect) {
285 *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
286 if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;
287 if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
288 }
289
290 if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
291 }
292
293
294 /***********************************************************************
295 * VIRTUAL_GetProt
296 *
297 * Build page protections from Win32 flags.
298 */
299 static BYTE VIRTUAL_GetProt( DWORD protect )
300 {
301 BYTE vprot;
302
303 switch(protect & 0xff)
304 {
305 case PAGE_READONLY:
306 vprot = VPROT_READ;
307 break;
308 case PAGE_READWRITE:
309 vprot = VPROT_READ | VPROT_WRITE;
310 break;
311 case PAGE_WRITECOPY:
312 vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
313 break;
314 case PAGE_EXECUTE:
315 vprot = VPROT_EXEC;
316 break;
317 case PAGE_EXECUTE_READ:
318 vprot = VPROT_EXEC | VPROT_READ;
319 break;
320 case PAGE_EXECUTE_READWRITE:
321 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
322 break;
323 case PAGE_EXECUTE_WRITECOPY:
324 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
325 break;
326 case PAGE_NOACCESS:
327 default:
328 vprot = 0;
329 break;
330 }
331 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
332 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
333 return vprot;
334 }
335
336
337 /***********************************************************************
338 * VIRTUAL_SetProt
339 *
340 * Change the protection of a range of pages.
341 */
342 static BOOL32 VIRTUAL_SetProt( FILE_VIEW *view, UINT32 base,
343 UINT32 size, BYTE vprot )
344 {
345 dprintf_virtual( stddeb, "VIRTUAL_SetProt: %08x-%08x %s\n",
346 base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
347
348 if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
349 return FALSE; /* FIXME: last error */
350
351 memset( view->prot + ((base - view->base) >> page_shift),
352 vprot, size >> page_shift );
353 if (debugging_virtual) VIRTUAL_DumpView( view );
354 return TRUE;
355 }
356
357
358 /***********************************************************************
359 * VIRTUAL_CheckFlags
360 *
361 * Check that all pages in a range have the given flags.
362 */
363 static BOOL32 VIRTUAL_CheckFlags( UINT32 base, UINT32 size, BYTE flags )
364 {
365 FILE_VIEW *view;
366 UINT32 page;
367
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;
374 return TRUE;
375 }
376
377
378 /***********************************************************************
379 * VIRTUAL_Init
380 */
381 BOOL32 VIRTUAL_Init(void)
382 {
383 SYSTEM_INFO sysinfo;
384 GetSystemInfo( &sysinfo );
385
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) );
391 page_shift = 0;
392 while ((1 << page_shift) != sysinfo.dwPageSize) page_shift++;
393
394 #ifdef linux
395 {
396 /* Do not use stdio here since it may temporarily change the size
397 * of some segments (ie libc6 adds 0x1000 per open FILE)
398 */
399 int fd = open ("/proc/self/maps", O_RDONLY);
400 if (fd >= 0)
401 {
402 char buffer[80];
403
404 for (;;)
405 {
406 int start, end, offset;
407 char r, w, x, p;
408 BYTE vprot = VPROT_COMMITTED;
409
410 char * ptr = buffer;
411 int count = sizeof(buffer);
412 while (1 == read(fd, ptr, 1) && *ptr != '\n' && --count > 0)
413 ptr++;
414
415 if (*ptr != '\n') break;
416 *ptr = '\0';
417
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 );
426 }
427 close (fd);
428 }
429 }
430 #endif /* linux */
431 return TRUE;
432 }
433
434
435 /***********************************************************************
436 * VirtualAlloc (KERNEL32.548)
437 */
438 LPVOID WINAPI VirtualAlloc( LPVOID addr, DWORD size, DWORD type, DWORD protect)
439 {
440 FILE_VIEW *view;
441 UINT32 base, ptr, view_size;
442 BYTE vprot;
443
444 dprintf_virtual( stddeb, "VirtualAlloc: %08x %08lx %lx %08lx\n",
445 (UINT32)addr, size, type, protect );
446
447 /* Round parameters to a page boundary */
448
449 if (size > 0x7fc00000) /* 2Gb - 4Mb */
450 {
451 SetLastError( ERROR_OUTOFMEMORY );
452 return NULL;
453 }
454 if (addr)
455 {
456 if (type & MEM_RESERVE) /* Round down to 64k boundary */
457 base = ((UINT32)addr + granularity_mask) & ~granularity_mask;
458 else
459 base = ROUND_ADDR( addr );
460 size = (((UINT32)addr + size + page_mask) & ~page_mask) - base;
461 if (base + size < base) /* Disallow wrap-around */
462 {
463 SetLastError( ERROR_INVALID_PARAMETER );
464 return NULL;
465 }
466 }
467 else
468 {
469 base = 0;
470 size = (size + page_mask) & ~page_mask;
471 }
472
473 /* Compute the protection flags */
474
475 if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
476 (type & ~(MEM_COMMIT | MEM_RESERVE)))
477 {
478 SetLastError( ERROR_INVALID_PARAMETER );
479 return NULL;
480 }
481 if (type & MEM_COMMIT)
482 vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
483 else vprot = 0;
484
485 /* Reserve the memory */
486
487 if ((type & MEM_RESERVE) || !base)
488 {
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)
493 {
494 SetLastError( ERROR_OUTOFMEMORY );
495 return NULL;
496 }
497 if (!base)
498 {
499 /* Release the extra memory while keeping the range */
500 /* starting on a 64k boundary. */
501
502 if (ptr & granularity_mask)
503 {
504 UINT32 extra = granularity_mask + 1 - (ptr & granularity_mask);
505 FILE_munmap( (void *)ptr, 0, extra );
506 ptr += extra;
507 view_size -= extra;
508 }
509 if (view_size > size)
510 FILE_munmap( (void *)(ptr + size), 0, view_size - size );
511 }
512 else if (ptr != base)
513 {
514 /* We couldn't get the address we wanted */
515 FILE_munmap( (void *)ptr, 0, view_size );
516 SetLastError( ERROR_INVALID_ADDRESS );
517 return NULL;
518 }
519 if (!(view = VIRTUAL_CreateView( ptr, size, 0, 0, vprot, NULL )))
520 {
521 FILE_munmap( (void *)ptr, 0, size );
522 SetLastError( ERROR_OUTOFMEMORY );
523 return NULL;
524 }
525 if (debugging_virtual) VIRTUAL_DumpView( view );
526 return (LPVOID)ptr;
527 }
528
529 /* Commit the pages */
530
531 if (!(view = VIRTUAL_FindView( base )) ||
532 (base + size > view->base + view->size))
533 {
534 SetLastError( ERROR_INVALID_PARAMETER );
535 return NULL;
536 }
537
538 if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
539 return (LPVOID)base;
540 }
541
542
543 /***********************************************************************
544 * VirtualFree (KERNEL32.550)
545 */
546 BOOL32 WINAPI VirtualFree( LPVOID addr, DWORD size, DWORD type )
547 {
548 FILE_VIEW *view;
549 UINT32 base;
550
551 dprintf_virtual( stddeb, "VirtualFree: %08x %08lx %lx\n",
552 (UINT32)addr, size, type );
553
554 /* Fix the parameters */
555
556 size = ROUND_SIZE( addr, size );
557 base = ROUND_ADDR( addr );
558
559 if (!(view = VIRTUAL_FindView( base )) ||
560 (base + size > view->base + view->size))
561 {
562 SetLastError( ERROR_INVALID_PARAMETER );
563 return FALSE;
564 }
565
566 /* Compute the protection flags */
567
568 if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
569 {
570 SetLastError( ERROR_INVALID_PARAMETER );
571 return FALSE;
572 }
573
574 /* Free the pages */
575
576 if (type == MEM_RELEASE)
577 {
578 if (size || (base != view->base))
579 {
580 SetLastError( ERROR_INVALID_PARAMETER );
581 return FALSE;
582 }
583 VIRTUAL_DeleteView( view );
584 return TRUE;
585 }
586
587 /* Decommit the pages */
588
589 return VIRTUAL_SetProt( view, base, size, 0 );
590 }
591
592
593 /***********************************************************************
594 * VirtualLock (KERNEL32.551)
595 */
596 BOOL32 WINAPI VirtualLock( LPVOID addr, DWORD size )
597 {
598 return TRUE;
599 }
600
601
602 /***********************************************************************
603 * VirtualUnlock (KERNEL32.556)
604 */
605 BOOL32 WINAPI VirtualUnlock( LPVOID addr, DWORD size )
606 {
607 return TRUE;
608 }
609
610
611 /***********************************************************************
612 * VirtualProtect (KERNEL32.552)
613 */
614 BOOL32 WINAPI VirtualProtect( LPVOID addr, DWORD size, DWORD new_prot,
615 LPDWORD old_prot )
616 {
617 FILE_VIEW *view;
618 UINT32 base, i;
619 BYTE vprot, *p;
620
621 dprintf_virtual( stddeb, "VirtualProtect: %08x %08lx %08lx\n",
622 (UINT32)addr, size, new_prot );
623
624 /* Fix the parameters */
625
626 size = ROUND_SIZE( addr, size );
627 base = ROUND_ADDR( addr );
628
629 if (!(view = VIRTUAL_FindView( base )) ||
630 (base + size > view->base + view->size))
631 {
632 SetLastError( ERROR_INVALID_PARAMETER );
633 return FALSE;
634 }
635
636 /* Make sure all the pages are committed */
637
638 p = view->prot + ((base - view->base) >> page_shift);
639 for (i = size >> page_shift; i; i--, p++)
640 {
641 if (!(*p & VPROT_COMMITTED))
642 {
643 SetLastError( ERROR_INVALID_PARAMETER );
644 return FALSE;
645 }
646 }
647
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 );
651 }
652
653
654 /***********************************************************************
655 * VirtualProtectEx (KERNEL32.553)
656 */
657 BOOL32 WINAPI VirtualProtectEx( HANDLE32 handle, LPVOID addr, DWORD size,
658 DWORD new_prot, LPDWORD old_prot )
659 {
660 BOOL32 ret = FALSE;
661
662 PDB32 *pdb = (PDB32 *)PROCESS_GetObjPtr( handle, K32OBJ_PROCESS );
663 if (pdb)
664 {
665 if (pdb == PROCESS_Current())
666 ret = VirtualProtect( addr, size, new_prot, old_prot );
667 else
668 fprintf(stderr,"Unsupported: VirtualProtectEx on other process\n");
669 K32OBJ_DecCount( &pdb->header );
670 }
671 return ret;
672 }
673
674
675 /***********************************************************************
676 * VirtualQuery (KERNEL32.554)
677 */
678 BOOL32 WINAPI VirtualQuery( LPCVOID addr, LPMEMORY_BASIC_INFORMATION info,
679 DWORD len )
680 {
681 FILE_VIEW *view = VIRTUAL_FirstView;
682 UINT32 base = ROUND_ADDR( addr );
683 UINT32 alloc_base = 0;
684 UINT32 size = 0;
685
686 /* Find the view containing the address */
687
688 for (;;)
689 {
690 if (!view)
691 {
692 size = 0xffff0000 - alloc_base;
693 break;
694 }
695 if (view->base > base)
696 {
697 size = view->base - alloc_base;
698 view = NULL;
699 break;
700 }
701 if (view->base + view->size > base)
702 {
703 alloc_base = view->base;
704 size = view->size;
705 break;
706 }
707 alloc_base = view->base + view->size;
708 view = view->next;
709 }
710
711 /* Fill the info structure */
712
713 if (!view)
714 {
715 info->State = MEM_FREE;
716 info->Protect = 0;
717 info->AllocationProtect = 0;
718 info->Type = 0;
719 }
720 else
721 {
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 */
728 }
729
730 info->BaseAddress = (LPVOID)base;
731 info->AllocationBase = (LPVOID)alloc_base;
732 info->RegionSize = size - (base - alloc_base);
733 return TRUE;
734 }
735
736
737 /***********************************************************************
738 * VirtualQueryEx (KERNEL32.555)
739 */
740 BOOL32 WINAPI VirtualQueryEx( HANDLE32 handle, LPCVOID addr,
741 LPMEMORY_BASIC_INFORMATION info, DWORD len )
742 {
743 BOOL32 ret = FALSE;
744
745 PDB32 *pdb = (PDB32 *)PROCESS_GetObjPtr( handle, K32OBJ_PROCESS );
746 if (pdb)
747 {
748 if (pdb == PROCESS_Current())
749 ret = VirtualQuery( addr, info, len );
750 else
751 fprintf(stderr,"Unsupported: VirtualQueryEx on other process\n");
752 K32OBJ_DecCount( &pdb->header );
753 }
754 return ret;
755 }
756
757
758 /***********************************************************************
759 * IsBadReadPtr32 (KERNEL32.354)
760 */
761 BOOL32 WINAPI IsBadReadPtr32( LPCVOID ptr, UINT32 size )
762 {
763 return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
764 VPROT_READ | VPROT_COMMITTED );
765 }
766
767
768 /***********************************************************************
769 * IsBadWritePtr32 (KERNEL32.357)
770 */
771 BOOL32 WINAPI IsBadWritePtr32( LPVOID ptr, UINT32 size )
772 {
773 return !VIRTUAL_CheckFlags( (UINT32)ptr, size,
774 VPROT_WRITE | VPROT_COMMITTED );
775 }
776
777
778 /***********************************************************************
779 * IsBadHugeReadPtr32 (KERNEL32.352)
780 */
781 BOOL32 WINAPI IsBadHugeReadPtr32( LPCVOID ptr, UINT32 size )
782 {
783 return IsBadReadPtr32( ptr, size );
784 }
785
786
787 /***********************************************************************
788 * IsBadHugeWritePtr32 (KERNEL32.353)
789 */
790 BOOL32 WINAPI IsBadHugeWritePtr32( LPVOID ptr, UINT32 size )
791 {
792 return IsBadWritePtr32( ptr, size );
793 }
794
795
796 /***********************************************************************
797 * IsBadCodePtr32 (KERNEL32.351)
798 */
799 BOOL32 WINAPI IsBadCodePtr32( FARPROC32 ptr )
800 {
801 return !VIRTUAL_CheckFlags( (UINT32)ptr, 1, VPROT_EXEC | VPROT_COMMITTED );
802 }
803
804
805 /***********************************************************************
806 * IsBadStringPtr32A (KERNEL32.355)
807 */
808 BOOL32 WINAPI IsBadStringPtr32A( LPCSTR str, UINT32 max )
809 {
810 FILE_VIEW *view;
811 UINT32 page, count;
812
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);
817
818 while (max)
819 {
820 if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
821 (VPROT_READ | VPROT_COMMITTED))
822 return TRUE;
823 if (count > max) count = max;
824 max -= count;
825 while (count--) if (!*str++) return FALSE;
826 if (++page >= view->size >> page_shift) return TRUE;
827 count = page_mask + 1;
828 }
829 return FALSE;
830 }
831
832
833 /***********************************************************************
834 * IsBadStringPtr32W (KERNEL32.356)
835 */
836 BOOL32 WINAPI IsBadStringPtr32W( LPCWSTR str, UINT32 max )
837 {
838 FILE_VIEW *view;
839 UINT32 page, count;
840
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);
845
846 while (max)
847 {
848 if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) !=
849 (VPROT_READ | VPROT_COMMITTED))
850 return TRUE;
851 if (count > max) count = max;
852 max -= count;
853 while (count--) if (!*str++) return FALSE;
854 if (++page >= view->size >> page_shift) return TRUE;
855 count = (page_mask + 1) / sizeof(WCHAR);
856 }
857 return FALSE;
858 }
859
860
861 /***********************************************************************
862 * CreateFileMapping32A (KERNEL32.46)
863 */
864 HANDLE32 WINAPI CreateFileMapping32A(HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
865 DWORD protect, DWORD size_high,
866 DWORD size_low, LPCSTR name )
867 {
868 FILE_MAPPING *mapping = NULL;
869 HANDLE32 handle;
870 BYTE vprot;
871
872 /* First search for an object with the same name */
873
874 K32OBJ *obj = K32OBJ_FindName( name );
875 if (obj)
876 {
877 if (obj->type == K32OBJ_MEM_MAPPED_FILE)
878 {
879 SetLastError( ERROR_ALREADY_EXISTS );
880 handle = PROCESS_AllocHandle( obj, 0 );
881 }
882 else
883 {
884 SetLastError( ERROR_DUP_NAME );
885 handle = 0;
886 }
887 K32OBJ_DecCount( obj );
888 return handle;
889 }
890
891 /* Check parameters */
892
893 dprintf_virtual(stddeb,"CreateFileMapping32A(%x,%p,%08lx,%08lx%08lx,%s)\n",
894 hFile, attr, protect, size_high, size_low, name );
895
896 vprot = VIRTUAL_GetProt( protect );
897 if (protect & SEC_RESERVE)
898 {
899 if (hFile != INVALID_HANDLE_VALUE32)
900 {
901 SetLastError( ERROR_INVALID_PARAMETER );
902 return 0;
903 }
904 }
905 else vprot |= VPROT_COMMITTED;
906 if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
907
908 /* Compute the size and extend the file if necessary */
909
910 if (hFile == INVALID_HANDLE_VALUE32)
911 {
912 if (!size_high && !size_low)
913 {
914 SetLastError( ERROR_INVALID_PARAMETER );
915 return 0;
916 }
917 obj = NULL;
918 }
919 else /* We have a file */
920 {
921 BY_HANDLE_FILE_INFORMATION info;
922 if (!(obj = PROCESS_GetObjPtr( hFile, K32OBJ_FILE ))) goto error;
923 /* FIXME: should check if the file permissions agree
924 * with the required protection flags */
925 if (!GetFileInformationByHandle( hFile, &info )) goto error;
926 if (!size_high && !size_low)
927 {
928 size_high = info.nFileSizeHigh;
929 size_low = info.nFileSizeLow;
930 }
931 else if ((size_high > info.nFileSizeHigh) ||
932 ((size_high == info.nFileSizeHigh) &&
933 (size_low > info.nFileSizeLow)))
934 {
935 /* We have to grow the file */
936 if (SetFilePointer( hFile, size_low, &size_high,
937 FILE_BEGIN ) == 0xffffffff) goto error;
938 if (!SetEndOfFile( hFile )) goto error;
939 }
940 }
941
942 /* Allocate the mapping object */
943
944 if (!(mapping = HeapAlloc( SystemHeap, 0, sizeof(*mapping) ))) goto error;
945 mapping->header.type = K32OBJ_MEM_MAPPED_FILE;
946 mapping->header.refcount = 1;
947 mapping->protect = vprot;
948 mapping->size_high = size_high;
949 mapping->size_low = ROUND_SIZE( 0, size_low );
950 mapping->file = (FILE_OBJECT *)obj;
951
952 if (!K32OBJ_AddName( &mapping->header, name )) handle = 0;
953 else handle = PROCESS_AllocHandle( &mapping->header, 0 );
954 K32OBJ_DecCount( &mapping->header );
955 return handle;
956
957 error:
958 if (obj) K32OBJ_DecCount( obj );
959 if (mapping) HeapFree( SystemHeap, 0, mapping );
960 return 0;
961 }
962
963
964 /***********************************************************************
965 * CreateFileMapping32W (KERNEL32.47)
966 */
967 HANDLE32 WINAPI CreateFileMapping32W(HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
968 DWORD protect, DWORD size_high,
969 DWORD size_low, LPCWSTR name )
970 {
971 LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
972 HANDLE32 ret = CreateFileMapping32A( hFile, attr, protect,
973 size_high, size_low, nameA );
974 HeapFree( GetProcessHeap(), 0, nameA );
975 return ret;
976 }
977
978
979 /***********************************************************************
980 * OpenFileMapping32A (KERNEL32.397)
981 */
982 HANDLE32 WINAPI OpenFileMapping32A( DWORD access, BOOL32 inherit, LPCSTR name )
983 {
984 HANDLE32 handle = 0;
985 K32OBJ *obj;
986 SYSTEM_LOCK();
987 if ((obj = K32OBJ_FindNameType( name, K32OBJ_MEM_MAPPED_FILE )))
988 {
989 handle = PROCESS_AllocHandle( obj, 0 );
990 K32OBJ_DecCount( obj );
991 }
992 SYSTEM_UNLOCK();
993 return handle;
994 }
995
996
997 /***********************************************************************
998 * OpenFileMapping32W (KERNEL32.398)
999 */
1000 HANDLE32 WINAPI OpenFileMapping32W( DWORD access, BOOL32 inherit, LPCWSTR name)
1001 {
1002 LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
1003 HANDLE32 ret = OpenFileMapping32A( access, inherit, nameA );
1004 HeapFree( GetProcessHeap(), 0, nameA );
1005 return ret;
1006 }
1007
1008
1009 /***********************************************************************
1010 * VIRTUAL_DestroyMapping
1011 *
1012 * Destroy a FILE_MAPPING object.
1013 */
1014 static void VIRTUAL_DestroyMapping( K32OBJ *ptr )
1015 {
1016 FILE_MAPPING *mapping = (FILE_MAPPING *)ptr;
1017 assert( ptr->type == K32OBJ_MEM_MAPPED_FILE );
1018
1019 if (mapping->file) K32OBJ_DecCount( &mapping->file->header );
1020 ptr->type = K32OBJ_UNKNOWN;
1021 HeapFree( SystemHeap, 0, mapping );
1022 }
1023
1024
1025 /***********************************************************************
1026 * MapViewOfFile (KERNEL32.385)
1027 */
1028 LPVOID WINAPI MapViewOfFile( HANDLE32 mapping, DWORD access, DWORD offset_high,
1029 DWORD offset_low, DWORD count )
1030 {
1031 return MapViewOfFileEx( mapping, access, offset_high,
1032 offset_low, count, NULL );
1033 }
1034
1035
1036 /***********************************************************************
1037 * MapViewOfFileEx (KERNEL32.386)
1038 */
1039 LPVOID WINAPI MapViewOfFileEx(HANDLE32 handle, DWORD access, DWORD offset_high,
1040 DWORD offset_low, DWORD count, LPVOID addr )
1041 {
1042 FILE_MAPPING *mapping;
1043 FILE_VIEW *view;
1044 UINT32 ptr = (UINT32)-1, size = 0;
1045 int flags = MAP_PRIVATE;
1046
1047 /* Check parameters */
1048
1049 if ((offset_low & granularity_mask) ||
1050 (addr && ((UINT32)addr & granularity_mask)))
1051 {
1052 SetLastError( ERROR_INVALID_PARAMETER );
1053 return NULL;
1054 }
1055
1056 if (!(mapping = (FILE_MAPPING *)PROCESS_GetObjPtr( handle,
1057 K32OBJ_MEM_MAPPED_FILE )))
1058 return NULL;
1059
1060 if (mapping->size_high || offset_high)
1061 fprintf( stderr, "MapViewOfFileEx: offsets larger than 4Gb not supported\n");
1062
1063 if ((offset_low >= mapping->size_low) ||
1064 (count > mapping->size_low - offset_low))
1065 {
1066 SetLastError( ERROR_INVALID_PARAMETER );
1067 goto error;
1068 }
1069 if (count) size = ROUND_SIZE( offset_low, count );
1070 else size = mapping->size_low - offset_low;
1071
1072 switch(access)
1073 {
1074 case FILE_MAP_ALL_ACCESS:
1075 case FILE_MAP_WRITE:
1076 case FILE_MAP_WRITE | FILE_MAP_READ:
1077 if (!(mapping->protect & VPROT_WRITE))
1078 {
1079 SetLastError( ERROR_INVALID_PARAMETER );
1080 goto error;
1081 }
1082 flags = MAP_SHARED;
1083 /* fall through */
1084 case FILE_MAP_READ:
1085 case FILE_MAP_COPY:
1086 case FILE_MAP_COPY | FILE_MAP_READ:
1087 if (mapping->protect & VPROT_READ) break;
1088 /* fall through */
1089 default:
1090 SetLastError( ERROR_INVALID_PARAMETER );
1091 goto error;
1092 }
1093
1094 /* Map the file */
1095
1096 dprintf_virtual( stddeb, "MapViewOfFile: handle=%x size=%x offset=%lx\n",
1097 handle, size, offset_low );
1098
1099 ptr = (UINT32)FILE_dommap( mapping->file, addr, 0, size, 0, offset_low,
1100 VIRTUAL_GetUnixProt( mapping->protect ),
1101 flags );
1102 if (ptr == (UINT32)-1)
1103 {
1104 SetLastError( ERROR_OUTOFMEMORY );
1105 goto error;
1106 }
1107
1108 if (!(view = VIRTUAL_CreateView( ptr, size, offset_low, 0,
1109 mapping->protect, mapping )))
1110 {
1111 SetLastError( ERROR_OUTOFMEMORY );
1112 goto error;
1113 }
1114 return (LPVOID)ptr;
1115
1116 error:
1117 if (ptr != (UINT32)-1) FILE_munmap( (void *)ptr, 0, size );
1118 K32OBJ_DecCount( &mapping->header );
1119 return NULL;
1120 }
1121
1122
1123 /***********************************************************************
1124 * FlushViewOfFile (KERNEL32.262)
1125 */
1126 BOOL32 WINAPI FlushViewOfFile( LPCVOID base, DWORD cbFlush )
1127 {
1128 FILE_VIEW *view;
1129 UINT32 addr = ROUND_ADDR( base );
1130
1131 dprintf_virtual( stddeb, "FlushViewOfFile at %p for %ld bytes\n",
1132 base, cbFlush );
1133
1134 if (!(view = VIRTUAL_FindView( addr )))
1135 {
1136 SetLastError( ERROR_INVALID_PARAMETER );
1137 return FALSE;
1138 }
1139 if (!cbFlush) cbFlush = view->size;
1140 if (!msync( (void *)addr, cbFlush, MS_SYNC )) return TRUE;
1141 SetLastError( ERROR_INVALID_PARAMETER );
1142 return FALSE;
1143
1144 }
1145 /***********************************************************************
1146 * UnmapViewOfFile (KERNEL32.540)
1147 */
1148 BOOL32 WINAPI UnmapViewOfFile( LPVOID addr )
1149 {
1150 FILE_VIEW *view;
1151 UINT32 base = ROUND_ADDR( addr );
1152 if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1153 {
1154 SetLastError( ERROR_INVALID_PARAMETER );
1155 return FALSE;
1156 }
1157 VIRTUAL_DeleteView( view );
1158 return TRUE;
1159 }
Windows API implementation