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Move mapping (section) objects into directory name space.
[wine/wine64.git] / dlls / ntdll / virtual.c
blobd04c79ed0d333a590a9e6e783402482fc7fbacb8
1 /*
2 * Win32 virtual memory functions
3 *
4 * Copyright 1997, 2002 Alexandre Julliard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 #include "config.h"
22 #include "wine/port.h"
23
24 #include <assert.h>
25 #include <errno.h>
26 #ifdef HAVE_SYS_ERRNO_H
27 #include <sys/errno.h>
28 #endif
29 #include <fcntl.h>
30 #ifdef HAVE_UNISTD_H
31 # include <unistd.h>
32 #endif
33 #include <stdarg.h>
34 #include <stdlib.h>
35 #include <stdio.h>
36 #include <string.h>
37 #include <sys/types.h>
38 #ifdef HAVE_SYS_MMAN_H
39 #include <sys/mman.h>
40 #endif
41
42 #define NONAMELESSUNION
43 #define NONAMELESSSTRUCT
44 #include "ntstatus.h"
45 #define WIN32_NO_STATUS
46 #include "windef.h"
47 #include "winternl.h"
48 #include "winioctl.h"
49 #include "wine/library.h"
50 #include "wine/server.h"
51 #include "wine/list.h"
52 #include "wine/debug.h"
53 #include "ntdll_misc.h"
54
55 WINE_DEFAULT_DEBUG_CHANNEL(virtual);
56 WINE_DECLARE_DEBUG_CHANNEL(module);
57
58 #ifndef MS_SYNC
59 #define MS_SYNC 0
60 #endif
61
62 #ifndef MAP_NORESERVE
63 #define MAP_NORESERVE 0
64 #endif
65
66 /* File view */
67 typedef struct file_view
68 {
69 struct list entry; /* Entry in global view list */
70 void *base; /* Base address */
71 size_t size; /* Size in bytes */
72 HANDLE mapping; /* Handle to the file mapping */
73 BYTE flags; /* Allocation flags (VFLAG_*) */
74 BYTE protect; /* Protection for all pages at allocation time */
75 BYTE prot[1]; /* Protection byte for each page */
76 } FILE_VIEW;
77
78 /* Per-view flags */
79 #define VFLAG_SYSTEM 0x01 /* system view (underlying mmap not under our control) */
80 #define VFLAG_VALLOC 0x02 /* allocated by VirtualAlloc */
81
82 /* Conversion from VPROT_* to Win32 flags */
83 static const BYTE VIRTUAL_Win32Flags[16] =
84 {
85 PAGE_NOACCESS, /* 0 */
86 PAGE_READONLY, /* READ */
87 PAGE_READWRITE, /* WRITE */
88 PAGE_READWRITE, /* READ | WRITE */
89 PAGE_EXECUTE, /* EXEC */
90 PAGE_EXECUTE_READ, /* READ | EXEC */
91 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
92 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
93 PAGE_WRITECOPY, /* WRITECOPY */
94 PAGE_WRITECOPY, /* READ | WRITECOPY */
95 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
96 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
97 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
98 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
99 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
100 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
101 };
102
103 static struct list views_list = LIST_INIT(views_list);
104
105 static RTL_CRITICAL_SECTION csVirtual;
106 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
107 {
108 0, 0, &csVirtual,
109 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
110 0, 0, { (DWORD_PTR)(__FILE__ ": csVirtual") }
111 };
112 static RTL_CRITICAL_SECTION csVirtual = { &critsect_debug, -1, 0, 0, 0, 0 };
113
114 #ifdef __i386__
115 /* These are always the same on an i386, and it will be faster this way */
116 # define page_mask 0xfff
117 # define page_shift 12
118 # define page_size 0x1000
119 /* Note: these are Windows limits, you cannot change them. */
120 # define ADDRESS_SPACE_LIMIT ((void *)0xc0000000) /* top of the total available address space */
121 # define USER_SPACE_LIMIT ((void *)0x80000000) /* top of the user address space */
122 #else
123 static UINT page_shift;
124 static UINT page_size;
125 static UINT_PTR page_mask;
126 # define ADDRESS_SPACE_LIMIT 0 /* no limit needed on other platforms */
127 # define USER_SPACE_LIMIT 0 /* no limit needed on other platforms */
128 #endif /* __i386__ */
129 static const UINT_PTR granularity_mask = 0xffff; /* Allocation granularity (usually 64k) */
130
131 #define ROUND_ADDR(addr,mask) \
132 ((void *)((UINT_PTR)(addr) & ~(UINT_PTR)(mask)))
133
134 #define ROUND_SIZE(addr,size) \
135 (((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
136
137 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
138 do { if (TRACE_ON(virtual)) VIRTUAL_DumpView(view); } while (0)
139
140 static void *user_space_limit = USER_SPACE_LIMIT;
141
142
143 /***********************************************************************
144 * VIRTUAL_GetProtStr
145 */
146 static const char *VIRTUAL_GetProtStr( BYTE prot )
147 {
148 static char buffer[6];
149 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
150 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
151 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
152 buffer[3] = (prot & VPROT_WRITECOPY) ? 'W' : ((prot & VPROT_WRITE) ? 'w' : '-');
153 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
154 buffer[5] = 0;
155 return buffer;
156 }
157
158
159 /***********************************************************************
160 * VIRTUAL_DumpView
161 */
162 static void VIRTUAL_DumpView( FILE_VIEW *view )
163 {
164 UINT i, count;
165 char *addr = view->base;
166 BYTE prot = view->prot[0];
167
168 TRACE( "View: %p - %p", addr, addr + view->size - 1 );
169 if (view->flags & VFLAG_SYSTEM)
170 TRACE( " (system)\n" );
171 else if (view->flags & VFLAG_VALLOC)
172 TRACE( " (valloc)\n" );
173 else if (view->mapping)
174 TRACE( " %p\n", view->mapping );
175 else
176 TRACE( " (anonymous)\n");
177
178 for (count = i = 1; i < view->size >> page_shift; i++, count++)
179 {
180 if (view->prot[i] == prot) continue;
181 TRACE( " %p - %p %s\n",
182 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
183 addr += (count << page_shift);
184 prot = view->prot[i];
185 count = 0;
186 }
187 if (count)
188 TRACE( " %p - %p %s\n",
189 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
190 }
191
192
193 /***********************************************************************
194 * VIRTUAL_Dump
195 */
196 void VIRTUAL_Dump(void)
197 {
198 struct file_view *view;
199
200 TRACE( "Dump of all virtual memory views:\n" );
201 RtlEnterCriticalSection(&csVirtual);
202 LIST_FOR_EACH_ENTRY( view, &views_list, FILE_VIEW, entry )
203 {
204 VIRTUAL_DumpView( view );
205 }
206 RtlLeaveCriticalSection(&csVirtual);
207 }
208
209
210 /***********************************************************************
211 * VIRTUAL_FindView
212 *
213 * Find the view containing a given address. The csVirtual section must be held by caller.
214 *
215 * PARAMS
216 * addr [I] Address
217 *
218 * RETURNS
219 * View: Success
220 * NULL: Failure
221 */
222 static struct file_view *VIRTUAL_FindView( const void *addr )
223 {
224 struct file_view *view;
225
226 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
227 {
228 if (view->base > addr) break;
229 if ((const char*)view->base + view->size > (const char*)addr) return view;
230 }
231 return NULL;
232 }
233
234
235 /***********************************************************************
236 * find_view_range
237 *
238 * Find the first view overlapping at least part of the specified range.
239 * The csVirtual section must be held by caller.
240 */
241 static struct file_view *find_view_range( const void *addr, size_t size )
242 {
243 struct file_view *view;
244
245 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
246 {
247 if ((const char *)view->base >= (const char *)addr + size) break;
248 if ((const char *)view->base + view->size > (const char *)addr) return view;
249 }
250 return NULL;
251 }
252
253
254 /***********************************************************************
255 * add_reserved_area
256 *
257 * Add a reserved area to the list maintained by libwine.
258 * The csVirtual section must be held by caller.
259 */
260 static void add_reserved_area( void *addr, size_t size )
261 {
262 TRACE( "adding %p-%p\n", addr, (char *)addr + size );
263
264 if (addr < user_space_limit)
265 {
266 /* unmap the part of the area that is below the limit */
267 assert( (char *)addr + size > (char *)user_space_limit );
268 munmap( addr, (char *)user_space_limit - (char *)addr );
269 size -= (char *)user_space_limit - (char *)addr;
270 addr = user_space_limit;
271 }
272 /* blow away existing mappings */
273 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
274 wine_mmap_add_reserved_area( addr, size );
275 }
276
277
278 /***********************************************************************
279 * remove_reserved_area
280 *
281 * Remove a reserved area from the list maintained by libwine.
282 * The csVirtual section must be held by caller.
283 */
284 static void remove_reserved_area( void *addr, size_t size )
285 {
286 struct file_view *view;
287
288 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
289 {
290 if ((char *)view->base >= (char *)addr + size) break;
291 if ((char *)view->base + view->size <= (char *)addr) continue;
292 /* now we have an overlapping view */
293 if (view->base > addr)
294 {
295 wine_mmap_remove_reserved_area( addr, (char *)view->base - (char *)addr, TRUE );
296 size -= (char *)view->base - (char *)addr;
297 addr = view->base;
298 }
299 if ((char *)view->base + view->size >= (char *)addr + size)
300 {
301 /* view covers all the remaining area */
302 wine_mmap_remove_reserved_area( addr, size, FALSE );
303 size = 0;
304 break;
305 }
306 else /* view covers only part of the area */
307 {
308 wine_mmap_remove_reserved_area( addr, (char *)view->base + view->size - (char *)addr, FALSE );
309 size -= (char *)view->base + view->size - (char *)addr;
310 addr = (char *)view->base + view->size;
311 }
312 }
313 /* remove remaining space */
314 if (size) wine_mmap_remove_reserved_area( addr, size, TRUE );
315 }
316
317
318 /***********************************************************************
319 * is_beyond_limit
320 *
321 * Check if an address range goes beyond a given limit.
322 */
323 static inline int is_beyond_limit( void *addr, size_t size, void *limit )
324 {
325 return (limit && (addr >= limit || (char *)addr + size > (char *)limit));
326 }
327
328
329 /***********************************************************************
330 * unmap_area
331 *
332 * Unmap an area, or simply replace it by an empty mapping if it is
333 * in a reserved area. The csVirtual section must be held by caller.
334 */
335 static inline void unmap_area( void *addr, size_t size )
336 {
337 if (wine_mmap_is_in_reserved_area( addr, size ))
338 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
339 else if (is_beyond_limit( addr, size, user_space_limit ))
340 add_reserved_area( addr, size );
341 else
342 munmap( addr, size );
343 }
344
345
346 /***********************************************************************
347 * delete_view
348 *
349 * Deletes a view. The csVirtual section must be held by caller.
350 */
351 static void delete_view( struct file_view *view ) /* [in] View */
352 {
353 if (!(view->flags & VFLAG_SYSTEM)) unmap_area( view->base, view->size );
354 list_remove( &view->entry );
355 if (view->mapping) NtClose( view->mapping );
356 free( view );
357 }
358
359
360 /***********************************************************************
361 * create_view
362 *
363 * Create a view. The csVirtual section must be held by caller.
364 */
365 static NTSTATUS create_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
366 {
367 struct file_view *view;
368 struct list *ptr;
369
370 assert( !((UINT_PTR)base & page_mask) );
371 assert( !(size & page_mask) );
372
373 /* Create the view structure */
374
375 if (!(view = malloc( sizeof(*view) + (size >> page_shift) - 1 ))) return STATUS_NO_MEMORY;
376
377 view->base = base;
378 view->size = size;
379 view->flags = 0;
380 view->mapping = 0;
381 view->protect = vprot;
382 memset( view->prot, vprot, size >> page_shift );
383
384 /* Insert it in the linked list */
385
386 LIST_FOR_EACH( ptr, &views_list )
387 {
388 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
389 if (next->base > base) break;
390 }
391 list_add_before( ptr, &view->entry );
392
393 /* Check for overlapping views. This can happen if the previous view
394 * was a system view that got unmapped behind our back. In that case
395 * we recover by simply deleting it. */
396
397 if ((ptr = list_prev( &views_list, &view->entry )) != NULL)
398 {
399 struct file_view *prev = LIST_ENTRY( ptr, struct file_view, entry );
400 if ((char *)prev->base + prev->size > (char *)base)
401 {
402 TRACE( "overlapping prev view %p-%p for %p-%p\n",
403 prev->base, (char *)prev->base + prev->size,
404 base, (char *)base + view->size );
405 assert( prev->flags & VFLAG_SYSTEM );
406 delete_view( prev );
407 }
408 }
409 if ((ptr = list_next( &views_list, &view->entry )) != NULL)
410 {
411 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
412 if ((char *)base + view->size > (char *)next->base)
413 {
414 TRACE( "overlapping next view %p-%p for %p-%p\n",
415 next->base, (char *)next->base + next->size,
416 base, (char *)base + view->size );
417 assert( next->flags & VFLAG_SYSTEM );
418 delete_view( next );
419 }
420 }
421
422 *view_ret = view;
423 VIRTUAL_DEBUG_DUMP_VIEW( view );
424 return STATUS_SUCCESS;
425 }
426
427
428 /***********************************************************************
429 * VIRTUAL_GetUnixProt
430 *
431 * Convert page protections to protection for mmap/mprotect.
432 */
433 static int VIRTUAL_GetUnixProt( BYTE vprot )
434 {
435 int prot = 0;
436 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
437 {
438 if (vprot & VPROT_READ) prot |= PROT_READ;
439 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
440 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
441 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
442 }
443 return prot;
444 }
445
446
447 /***********************************************************************
448 * VIRTUAL_GetWin32Prot
449 *
450 * Convert page protections to Win32 flags.
451 *
452 * RETURNS
453 * None
454 */
455 static void VIRTUAL_GetWin32Prot(
456 BYTE vprot, /* [in] Page protection flags */
457 DWORD *protect, /* [out] Location to store Win32 protection flags */
458 DWORD *state ) /* [out] Location to store mem state flag */
459 {
460 if (protect) {
461 *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
462 if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
463 if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS | PAGE_GUARD;
464 }
465
466 if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
467 }
468
469
470 /***********************************************************************
471 * VIRTUAL_GetProt
472 *
473 * Build page protections from Win32 flags.
474 *
475 * PARAMS
476 * protect [I] Win32 protection flags
477 *
478 * RETURNS
479 * Value of page protection flags
480 */
481 static BYTE VIRTUAL_GetProt( DWORD protect )
482 {
483 BYTE vprot;
484
485 switch(protect & 0xff)
486 {
487 case PAGE_READONLY:
488 vprot = VPROT_READ;
489 break;
490 case PAGE_READWRITE:
491 vprot = VPROT_READ | VPROT_WRITE;
492 break;
493 case PAGE_WRITECOPY:
494 /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
495 * that the hFile must have been opened with GENERIC_READ and
496 * GENERIC_WRITE access. This is WRONG as tests show that you
497 * only need GENERIC_READ access (at least for Win9x,
498 * FIXME: what about NT?). Thus, we don't put VPROT_WRITE in
499 * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
500 */
501 vprot = VPROT_READ | VPROT_WRITECOPY;
502 break;
503 case PAGE_EXECUTE:
504 vprot = VPROT_EXEC;
505 break;
506 case PAGE_EXECUTE_READ:
507 vprot = VPROT_EXEC | VPROT_READ;
508 break;
509 case PAGE_EXECUTE_READWRITE:
510 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
511 break;
512 case PAGE_EXECUTE_WRITECOPY:
513 /* See comment for PAGE_WRITECOPY above */
514 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
515 break;
516 case PAGE_NOACCESS:
517 default:
518 vprot = 0;
519 break;
520 }
521 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
522 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
523 return vprot;
524 }
525
526
527 /***********************************************************************
528 * VIRTUAL_SetProt
529 *
530 * Change the protection of a range of pages.
531 *
532 * RETURNS
533 * TRUE: Success
534 * FALSE: Failure
535 */
536 static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
537 void *base, /* [in] Starting address */
538 size_t size, /* [in] Size in bytes */
539 BYTE vprot ) /* [in] Protections to use */
540 {
541 TRACE("%p-%p %s\n",
542 base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
543
544 if (mprotect( base, size, VIRTUAL_GetUnixProt(vprot) ))
545 return FALSE; /* FIXME: last error */
546
547 memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
548 vprot, size >> page_shift );
549 VIRTUAL_DEBUG_DUMP_VIEW( view );
550 return TRUE;
551 }
552
553
554 /***********************************************************************
555 * unmap_extra_space
556 *
557 * Release the extra memory while keeping the range starting on the granularity boundary.
558 */
559 static inline void *unmap_extra_space( void *ptr, size_t total_size, size_t wanted_size, size_t mask )
560 {
561 if ((ULONG_PTR)ptr & mask)
562 {
563 size_t extra = mask + 1 - ((ULONG_PTR)ptr & mask);
564 munmap( ptr, extra );
565 ptr = (char *)ptr + extra;
566 total_size -= extra;
567 }
568 if (total_size > wanted_size)
569 munmap( (char *)ptr + wanted_size, total_size - wanted_size );
570 return ptr;
571 }
572
573
574 /***********************************************************************
575 * map_view
576 *
577 * Create a view and mmap the corresponding memory area.
578 * The csVirtual section must be held by caller.
579 */
580 static NTSTATUS map_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
581 {
582 void *ptr;
583 NTSTATUS status;
584
585 if (base)
586 {
587 if (is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
588 return STATUS_WORKING_SET_LIMIT_RANGE;
589
590 switch (wine_mmap_is_in_reserved_area( base, size ))
591 {
592 case -1: /* partially in a reserved area */
593 return STATUS_CONFLICTING_ADDRESSES;
594
595 case 0: /* not in a reserved area, do a normal allocation */
596 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
597 {
598 if (errno == ENOMEM) return STATUS_NO_MEMORY;
599 return STATUS_INVALID_PARAMETER;
600 }
601 if (ptr != base)
602 {
603 /* We couldn't get the address we wanted */
604 if (is_beyond_limit( ptr, size, user_space_limit )) add_reserved_area( ptr, size );
605 else munmap( ptr, size );
606 return STATUS_CONFLICTING_ADDRESSES;
607 }
608 break;
609
610 default:
611 case 1: /* in a reserved area, make sure the address is available */
612 if (find_view_range( base, size )) return STATUS_CONFLICTING_ADDRESSES;
613 /* replace the reserved area by our mapping */
614 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED )) != base)
615 return STATUS_INVALID_PARAMETER;
616 break;
617 }
618 }
619 else
620 {
621 size_t view_size = size + granularity_mask + 1;
622
623 for (;;)
624 {
625 if ((ptr = wine_anon_mmap( NULL, view_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
626 {
627 if (errno == ENOMEM) return STATUS_NO_MEMORY;
628 return STATUS_INVALID_PARAMETER;
629 }
630 /* if we got something beyond the user limit, unmap it and retry */
631 if (is_beyond_limit( ptr, view_size, user_space_limit )) add_reserved_area( ptr, view_size );
632 else break;
633 }
634 ptr = unmap_extra_space( ptr, view_size, size, granularity_mask );
635 }
636
637 status = create_view( view_ret, ptr, size, vprot );
638 if (status != STATUS_SUCCESS) unmap_area( ptr, size );
639 return status;
640 }
641
642
643 /***********************************************************************
644 * unaligned_mmap
645 *
646 * Linux kernels before 2.4.x can support non page-aligned offsets, as
647 * long as the offset is aligned to the filesystem block size. This is
648 * a big performance gain so we want to take advantage of it.
649 *
650 * However, when we use 64-bit file support this doesn't work because
651 * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
652 * in that it rounds unaligned offsets down to a page boundary. For
653 * these reasons we do a direct system call here.
654 */
655 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
656 unsigned int flags, int fd, off_t offset )
657 {
658 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
659 if (!(offset >> 32) && (offset & page_mask))
660 {
661 int ret;
662
663 struct
664 {
665 void *addr;
666 unsigned int length;
667 unsigned int prot;
668 unsigned int flags;
669 unsigned int fd;
670 unsigned int offset;
671 } args;
672
673 args.addr = addr;
674 args.length = length;
675 args.prot = prot;
676 args.flags = flags;
677 args.fd = fd;
678 args.offset = offset;
679
680 __asm__ __volatile__("push %%ebx\n\t"
681 "movl %2,%%ebx\n\t"
682 "int $0x80\n\t"
683 "popl %%ebx"
684 : "=a" (ret)
685 : "0" (90), /* SYS_mmap */
686 "q" (&args)
687 : "memory" );
688 if (ret < 0 && ret > -4096)
689 {
690 errno = -ret;
691 ret = -1;
692 }
693 return (void *)ret;
694 }
695 #endif
696 return mmap( addr, length, prot, flags, fd, offset );
697 }
698
699
700 /***********************************************************************
701 * map_file_into_view
702 *
703 * Wrapper for mmap() to map a file into a view, falling back to read if mmap fails.
704 * The csVirtual section must be held by caller.
705 */
706 static NTSTATUS map_file_into_view( struct file_view *view, int fd, size_t start, size_t size,
707 off_t offset, BYTE vprot, BOOL removable )
708 {
709 void *ptr;
710 int prot = VIRTUAL_GetUnixProt( vprot );
711 BOOL shared_write = (vprot & VPROT_WRITE) != 0;
712
713 assert( start < view->size );
714 assert( start + size <= view->size );
715
716 /* only try mmap if media is not removable (or if we require write access) */
717 if (!removable || shared_write)
718 {
719 int flags = MAP_FIXED | (shared_write ? MAP_SHARED : MAP_PRIVATE);
720
721 if (unaligned_mmap( (char *)view->base + start, size, prot, flags, fd, offset ) != (void *)-1)
722 goto done;
723
724 /* mmap() failed; if this is because the file offset is not */
725 /* page-aligned (EINVAL), or because the underlying filesystem */
726 /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
727 if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return FILE_GetNtStatus();
728 if (shared_write) return FILE_GetNtStatus(); /* we cannot fake shared write mappings */
729 }
730
731 /* Reserve the memory with an anonymous mmap */
732 ptr = wine_anon_mmap( (char *)view->base + start, size, PROT_READ | PROT_WRITE, MAP_FIXED );
733 if (ptr == (void *)-1) return FILE_GetNtStatus();
734 /* Now read in the file */
735 pread( fd, ptr, size, offset );
736 if (prot != (PROT_READ|PROT_WRITE)) mprotect( ptr, size, prot ); /* Set the right protection */
737 done:
738 memset( view->prot + (start >> page_shift), vprot, size >> page_shift );
739 return STATUS_SUCCESS;
740 }
741
742
743 /***********************************************************************
744 * decommit_view
745 *
746 * Decommit some pages of a given view.
747 * The csVirtual section must be held by caller.
748 */
749 static NTSTATUS decommit_pages( struct file_view *view, size_t start, size_t size )
750 {
751 if (wine_anon_mmap( (char *)view->base + start, size, PROT_NONE, MAP_FIXED ) != (void *)-1)
752 {
753 BYTE *p = view->prot + (start >> page_shift);
754 size >>= page_shift;
755 while (size--) *p++ &= ~VPROT_COMMITTED;
756 return STATUS_SUCCESS;
757 }
758 return FILE_GetNtStatus();
759 }
760
761
762 /***********************************************************************
763 * do_relocations
764 *
765 * Apply the relocations to a mapped PE image
766 */
767 static int do_relocations( char *base, const IMAGE_DATA_DIRECTORY *dir,
768 int delta, SIZE_T total_size )
769 {
770 IMAGE_BASE_RELOCATION *rel;
771
772 TRACE_(module)( "relocating from %p-%p to %p-%p\n",
773 base - delta, base - delta + total_size, base, base + total_size );
774
775 for (rel = (IMAGE_BASE_RELOCATION *)(base + dir->VirtualAddress);
776 ((char *)rel < base + dir->VirtualAddress + dir->Size) && rel->SizeOfBlock;
777 rel = (IMAGE_BASE_RELOCATION*)((char*)rel + rel->SizeOfBlock) )
778 {
779 char *page = base + rel->VirtualAddress;
780 WORD *TypeOffset = (WORD *)(rel + 1);
781 int i, count = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(*TypeOffset);
782
783 if (!count) continue;
784
785 /* sanity checks */
786 if ((char *)rel + rel->SizeOfBlock > base + dir->VirtualAddress + dir->Size)
787 {
788 ERR_(module)("invalid relocation %p,%lx,%ld at %p,%lx,%lx\n",
789 rel, rel->VirtualAddress, rel->SizeOfBlock,
790 base, dir->VirtualAddress, dir->Size );
791 return 0;
792 }
793
794 if (page > base + total_size)
795 {
796 WARN_(module)("skipping %d relocations for page %p beyond module %p-%p\n",
797 count, page, base, base + total_size );
798 continue;
799 }
800
801 TRACE_(module)("%d relocations for page %lx\n", count, rel->VirtualAddress);
802
803 /* patching in reverse order */
804 for (i = 0 ; i < count; i++)
805 {
806 int offset = TypeOffset[i] & 0xFFF;
807 int type = TypeOffset[i] >> 12;
808 switch(type)
809 {
810 case IMAGE_REL_BASED_ABSOLUTE:
811 break;
812 case IMAGE_REL_BASED_HIGH:
813 *(short*)(page+offset) += HIWORD(delta);
814 break;
815 case IMAGE_REL_BASED_LOW:
816 *(short*)(page+offset) += LOWORD(delta);
817 break;
818 case IMAGE_REL_BASED_HIGHLOW:
819 *(int*)(page+offset) += delta;
820 /* FIXME: if this is an exported address, fire up enhanced logic */
821 break;
822 default:
823 FIXME_(module)("Unknown/unsupported fixup type %d.\n", type);
824 break;
825 }
826 }
827 }
828 return 1;
829 }
830
831
832 /***********************************************************************
833 * map_image
834 *
835 * Map an executable (PE format) image into memory.
836 */
837 static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, SIZE_T total_size,
838 SIZE_T header_size, int shared_fd, BOOL removable, PVOID *addr_ptr )
839 {
840 IMAGE_DOS_HEADER *dos;
841 IMAGE_NT_HEADERS *nt;
842 IMAGE_SECTION_HEADER *sec;
843 IMAGE_DATA_DIRECTORY *imports;
844 NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
845 int i;
846 off_t pos;
847 struct file_view *view = NULL;
848 char *ptr;
849
850 /* zero-map the whole range */
851
852 RtlEnterCriticalSection( &csVirtual );
853
854 if (base >= (char *)0x110000) /* make sure the DOS area remains free */
855 status = map_view( &view, base, total_size,
856 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
857
858 if (status == STATUS_CONFLICTING_ADDRESSES)
859 status = map_view( &view, NULL, total_size,
860 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
861
862 if (status != STATUS_SUCCESS) goto error;
863
864 ptr = view->base;
865 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
866
867 /* map the header */
868
869 status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
870 if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ,
871 removable ) != STATUS_SUCCESS) goto error;
872 dos = (IMAGE_DOS_HEADER *)ptr;
873 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
874 if ((char *)(nt + 1) > ptr + header_size) goto error;
875
876 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
877 if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
878
879 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
880 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
881
882 /* check the architecture */
883
884 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
885 {
886 MESSAGE("Trying to load PE image for unsupported architecture (");
887 switch (nt->FileHeader.Machine)
888 {
889 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
890 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
891 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
892 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
893 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
894 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
895 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
896 case IMAGE_FILE_MACHINE_IA64: MESSAGE("IA-64"); break;
897 case IMAGE_FILE_MACHINE_ALPHA64: MESSAGE("Alpha-64"); break;
898 case IMAGE_FILE_MACHINE_AMD64: MESSAGE("AMD-64"); break;
899 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
900 }
901 MESSAGE(")\n");
902 goto error;
903 }
904
905 /* check for non page-aligned binary */
906
907 if (nt->OptionalHeader.SectionAlignment <= page_mask)
908 {
909 /* unaligned sections, this happens for native subsystem binaries */
910 /* in that case Windows simply maps in the whole file */
911
912 if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ,
913 removable ) != STATUS_SUCCESS) goto error;
914
915 /* check that all sections are loaded at the right offset */
916 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
917 {
918 if (sec[i].VirtualAddress != sec[i].PointerToRawData)
919 goto error; /* Windows refuses to load in that case too */
920 }
921
922 /* set the image protections */
923 VIRTUAL_SetProt( view, ptr, total_size,
924 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
925
926 /* perform relocations if necessary */
927 /* FIXME: not 100% compatible, Windows doesn't do this for non page-aligned binaries */
928 if (ptr != base)
929 {
930 const IMAGE_DATA_DIRECTORY *relocs;
931 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
932 if (relocs->VirtualAddress && relocs->Size)
933 do_relocations( ptr, relocs, ptr - base, total_size );
934 }
935
936 goto done;
937 }
938
939
940 /* map all the sections */
941
942 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
943 {
944 SIZE_T map_size, file_size, end;
945
946 if (!sec->Misc.VirtualSize)
947 {
948 file_size = sec->SizeOfRawData;
949 map_size = ROUND_SIZE( 0, file_size );
950 }
951 else
952 {
953 map_size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
954 file_size = min( sec->SizeOfRawData, map_size );
955 }
956
957 /* a few sanity checks */
958 end = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, map_size );
959 if (sec->VirtualAddress > total_size || end > total_size || end < sec->VirtualAddress)
960 {
961 ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
962 sec->Name, sec->VirtualAddress, map_size, total_size );
963 goto error;
964 }
965
966 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
967 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
968 {
969 TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
970 sec->Name, ptr + sec->VirtualAddress,
971 sec->PointerToRawData, (int)pos, file_size, map_size,
972 sec->Characteristics );
973 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, map_size, pos,
974 VPROT_COMMITTED | VPROT_READ | PROT_WRITE,
975 FALSE ) != STATUS_SUCCESS)
976 {
977 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
978 goto error;
979 }
980
981 /* check if the import directory falls inside this section */
982 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
983 imports->VirtualAddress < sec->VirtualAddress + map_size)
984 {
985 UINT_PTR base = imports->VirtualAddress & ~page_mask;
986 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
987 if (end > sec->VirtualAddress + map_size) end = sec->VirtualAddress + map_size;
988 if (end > base)
989 map_file_into_view( view, shared_fd, base, end - base,
990 pos + (base - sec->VirtualAddress),
991 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
992 FALSE );
993 }
994 pos += map_size;
995 continue;
996 }
997
998 TRACE_(module)( "mapping section %.8s at %p off %lx size %lx virt %lx flags %lx\n",
999 sec->Name, ptr + sec->VirtualAddress,
1000 sec->PointerToRawData, sec->SizeOfRawData,
1001 sec->Misc.VirtualSize, sec->Characteristics );
1002
1003 if (!sec->PointerToRawData || !file_size) continue;
1004
1005 /* Note: if the section is not aligned properly map_file_into_view will magically
1006 * fall back to read(), so we don't need to check anything here.
1007 */
1008 if (map_file_into_view( view, fd, sec->VirtualAddress, file_size, sec->PointerToRawData,
1009 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1010 removable ) != STATUS_SUCCESS)
1011 {
1012 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
1013 goto error;
1014 }
1015
1016 if (file_size & page_mask)
1017 {
1018 end = ROUND_SIZE( 0, file_size );
1019 if (end > map_size) end = map_size;
1020 TRACE_(module)("clearing %p - %p\n",
1021 ptr + sec->VirtualAddress + file_size,
1022 ptr + sec->VirtualAddress + end );
1023 memset( ptr + sec->VirtualAddress + file_size, 0, end - file_size );
1024 }
1025 }
1026
1027
1028 /* perform base relocation, if necessary */
1029
1030 if (ptr != base)
1031 {
1032 const IMAGE_DATA_DIRECTORY *relocs;
1033
1034 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1035 if (!relocs->VirtualAddress || !relocs->Size)
1036 {
1037 if (nt->OptionalHeader.ImageBase == 0x400000) {
1038 ERR("Image was mapped at %p: standard load address for a Win32 program (0x00400000) not available\n", ptr);
1039 ERR("Do you have exec-shield or prelink active?\n");
1040 } else
1041 ERR( "FATAL: Need to relocate module from addr %lx, but there are no relocation records\n",
1042 nt->OptionalHeader.ImageBase );
1043 goto error;
1044 }
1045
1046 /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
1047 * really make sure that the *new* base address is also > 2GB.
1048 * Some DLLs really check the MSB of the module handle :-/
1049 */
1050 if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((ULONG_PTR)base & 0x80000000))
1051 ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
1052
1053 if (!do_relocations( ptr, relocs, ptr - base, total_size ))
1054 {
1055 goto error;
1056 }
1057 }
1058
1059 /* set the image protections */
1060
1061 sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
1062 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1063 {
1064 SIZE_T size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
1065 BYTE vprot = VPROT_COMMITTED;
1066 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
1067 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_READ|VPROT_WRITECOPY;
1068 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
1069 VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
1070 }
1071
1072 done:
1073 if (!removable) /* don't keep handle open on removable media */
1074 NtDuplicateObject( NtCurrentProcess(), hmapping,
1075 NtCurrentProcess(), &view->mapping,
1076 0, 0, DUPLICATE_SAME_ACCESS );
1077
1078 RtlLeaveCriticalSection( &csVirtual );
1079
1080 *addr_ptr = ptr;
1081 return STATUS_SUCCESS;
1082
1083 error:
1084 if (view) delete_view( view );
1085 RtlLeaveCriticalSection( &csVirtual );
1086 return status;
1087 }
1088
1089
1090 /***********************************************************************
1091 * is_current_process
1092 *
1093 * Check whether a process handle is for the current process.
1094 */
1095 BOOL is_current_process( HANDLE handle )
1096 {
1097 BOOL ret = FALSE;
1098
1099 if (handle == NtCurrentProcess()) return TRUE;
1100 SERVER_START_REQ( get_process_info )
1101 {
1102 req->handle = handle;
1103 if (!wine_server_call( req ))
1104 ret = ((DWORD)reply->pid == GetCurrentProcessId());
1105 }
1106 SERVER_END_REQ;
1107 return ret;
1108 }
1109
1110
1111 /***********************************************************************
1112 * virtual_init
1113 */
1114 static inline void virtual_init(void)
1115 {
1116 #ifndef page_mask
1117 page_size = getpagesize();
1118 page_mask = page_size - 1;
1119 /* Make sure we have a power of 2 */
1120 assert( !(page_size & page_mask) );
1121 page_shift = 0;
1122 while ((1 << page_shift) != page_size) page_shift++;
1123 #endif /* page_mask */
1124 }
1125
1126
1127 /***********************************************************************
1128 * VIRTUAL_alloc_teb
1129 *
1130 * Allocate a memory view for a new TEB, properly aligned to a multiple of the size.
1131 */
1132 NTSTATUS VIRTUAL_alloc_teb( void **ret, size_t size, BOOL first )
1133 {
1134 void *ptr;
1135 NTSTATUS status;
1136 struct file_view *view;
1137 size_t align_size;
1138 BYTE vprot = VPROT_READ | VPROT_WRITE | VPROT_COMMITTED;
1139
1140 if (first) virtual_init();
1141
1142 *ret = NULL;
1143 size = ROUND_SIZE( 0, size );
1144 align_size = page_size;
1145 while (align_size < size) align_size *= 2;
1146
1147 for (;;)
1148 {
1149 if ((ptr = wine_anon_mmap( NULL, 2 * align_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
1150 {
1151 if (errno == ENOMEM) return STATUS_NO_MEMORY;
1152 return STATUS_INVALID_PARAMETER;
1153 }
1154 if (!is_beyond_limit( ptr, 2 * align_size, user_space_limit ))
1155 {
1156 ptr = unmap_extra_space( ptr, 2 * align_size, align_size, align_size - 1 );
1157 break;
1158 }
1159 /* if we got something beyond the user limit, unmap it and retry */
1160 add_reserved_area( ptr, 2 * align_size );
1161 }
1162
1163 if (!first) RtlEnterCriticalSection( &csVirtual );
1164
1165 status = create_view( &view, ptr, size, vprot );
1166 if (status == STATUS_SUCCESS)
1167 {
1168 view->flags |= VFLAG_VALLOC;
1169 *ret = ptr;
1170 }
1171 else unmap_area( ptr, size );
1172
1173 if (!first) RtlLeaveCriticalSection( &csVirtual );
1174
1175 return status;
1176 }
1177
1178
1179 /***********************************************************************
1180 * VIRTUAL_HandleFault
1181 */
1182 NTSTATUS VIRTUAL_HandleFault( LPCVOID addr )
1183 {
1184 FILE_VIEW *view;
1185 NTSTATUS ret = STATUS_ACCESS_VIOLATION;
1186
1187 RtlEnterCriticalSection( &csVirtual );
1188 if ((view = VIRTUAL_FindView( addr )))
1189 {
1190 BYTE vprot = view->prot[((const char *)addr - (const char *)view->base) >> page_shift];
1191 void *page = (void *)((UINT_PTR)addr & ~page_mask);
1192 char *stack = NtCurrentTeb()->Tib.StackLimit;
1193 if (vprot & VPROT_GUARD)
1194 {
1195 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
1196 ret = STATUS_GUARD_PAGE_VIOLATION;
1197 }
1198 /* is it inside the stack guard page? */
1199 if (((const char *)addr >= stack) && ((const char *)addr < stack + (page_mask+1)))
1200 ret = STATUS_STACK_OVERFLOW;
1201 }
1202 RtlLeaveCriticalSection( &csVirtual );
1203 return ret;
1204 }
1205
1206 /***********************************************************************
1207 * VIRTUAL_HasMapping
1208 *
1209 * Check if the specified view has an associated file mapping.
1210 */
1211 BOOL VIRTUAL_HasMapping( LPCVOID addr )
1212 {
1213 FILE_VIEW *view;
1214 BOOL ret = FALSE;
1215
1216 RtlEnterCriticalSection( &csVirtual );
1217 if ((view = VIRTUAL_FindView( addr ))) ret = (view->mapping != 0);
1218 RtlLeaveCriticalSection( &csVirtual );
1219 return ret;
1220 }
1221
1222
1223 /***********************************************************************
1224 * VIRTUAL_UseLargeAddressSpace
1225 *
1226 * Increase the address space size for apps that support it.
1227 */
1228 void VIRTUAL_UseLargeAddressSpace(void)
1229 {
1230 if (user_space_limit >= ADDRESS_SPACE_LIMIT) return;
1231 /* no large address space on win9x */
1232 if (NtCurrentTeb()->Peb->OSPlatformId != VER_PLATFORM_WIN32_NT) return;
1233
1234 RtlEnterCriticalSection( &csVirtual );
1235 remove_reserved_area( user_space_limit, (char *)ADDRESS_SPACE_LIMIT - (char *)user_space_limit );
1236 user_space_limit = ADDRESS_SPACE_LIMIT;
1237 RtlLeaveCriticalSection( &csVirtual );
1238 }
1239
1240
1241 /***********************************************************************
1242 * NtAllocateVirtualMemory (NTDLL.@)
1243 * ZwAllocateVirtualMemory (NTDLL.@)
1244 */
1245 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
1246 SIZE_T *size_ptr, ULONG type, ULONG protect )
1247 {
1248 void *base;
1249 BYTE vprot;
1250 SIZE_T size = *size_ptr;
1251 NTSTATUS status = STATUS_SUCCESS;
1252 struct file_view *view;
1253
1254 TRACE("%p %p %08lx %lx %08lx\n", process, *ret, size, type, protect );
1255
1256 if (!size) return STATUS_INVALID_PARAMETER;
1257
1258 if (!is_current_process( process ))
1259 {
1260 ERR("Unsupported on other process\n");
1261 return STATUS_ACCESS_DENIED;
1262 }
1263
1264 /* Round parameters to a page boundary */
1265
1266 if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
1267
1268 if (*ret)
1269 {
1270 if (type & MEM_RESERVE) /* Round down to 64k boundary */
1271 base = ROUND_ADDR( *ret, granularity_mask );
1272 else
1273 base = ROUND_ADDR( *ret, page_mask );
1274 size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1275
1276 /* disallow low 64k, wrap-around and kernel space */
1277 if (((char *)base <= (char *)granularity_mask) ||
1278 ((char *)base + size < (char *)base) ||
1279 is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
1280 return STATUS_INVALID_PARAMETER;
1281 }
1282 else
1283 {
1284 base = NULL;
1285 size = (size + page_mask) & ~page_mask;
1286 }
1287
1288 if (type & MEM_TOP_DOWN) {
1289 /* FIXME: MEM_TOP_DOWN allocates the largest possible address. */
1290 WARN("MEM_TOP_DOWN ignored\n");
1291 type &= ~MEM_TOP_DOWN;
1292 }
1293
1294 if (zero_bits)
1295 WARN("zero_bits %lu ignored\n", zero_bits);
1296
1297 /* Compute the alloc type flags */
1298
1299 if (!(type & MEM_SYSTEM))
1300 {
1301 if (!(type & (MEM_COMMIT | MEM_RESERVE)) || (type & ~(MEM_COMMIT | MEM_RESERVE)))
1302 {
1303 WARN("called with wrong alloc type flags (%08lx) !\n", type);
1304 return STATUS_INVALID_PARAMETER;
1305 }
1306 }
1307 vprot = VIRTUAL_GetProt( protect );
1308 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
1309
1310 /* Reserve the memory */
1311
1312 RtlEnterCriticalSection( &csVirtual );
1313
1314 if (type & MEM_SYSTEM)
1315 {
1316 if (type & MEM_IMAGE) vprot |= VPROT_IMAGE;
1317 status = create_view( &view, base, size, vprot | VPROT_COMMITTED );
1318 if (status == STATUS_SUCCESS)
1319 {
1320 view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
1321 base = view->base;
1322 }
1323 }
1324 else if ((type & MEM_RESERVE) || !base)
1325 {
1326 status = map_view( &view, base, size, vprot );
1327 if (status == STATUS_SUCCESS)
1328 {
1329 view->flags |= VFLAG_VALLOC;
1330 base = view->base;
1331 }
1332 }
1333 else /* commit the pages */
1334 {
1335 if (!(view = VIRTUAL_FindView( base )) ||
1336 ((char *)base + size > (char *)view->base + view->size)) status = STATUS_NOT_MAPPED_VIEW;
1337 else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1338 }
1339
1340 RtlLeaveCriticalSection( &csVirtual );
1341
1342 if (status == STATUS_SUCCESS)
1343 {
1344 *ret = base;
1345 *size_ptr = size;
1346 }
1347 return status;
1348 }
1349
1350
1351 /***********************************************************************
1352 * NtFreeVirtualMemory (NTDLL.@)
1353 * ZwFreeVirtualMemory (NTDLL.@)
1354 */
1355 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr, ULONG type )
1356 {
1357 FILE_VIEW *view;
1358 char *base;
1359 NTSTATUS status = STATUS_SUCCESS;
1360 LPVOID addr = *addr_ptr;
1361 SIZE_T size = *size_ptr;
1362
1363 TRACE("%p %p %08lx %lx\n", process, addr, size, type );
1364
1365 if (!is_current_process( process ))
1366 {
1367 ERR("Unsupported on other process\n");
1368 return STATUS_ACCESS_DENIED;
1369 }
1370
1371 /* Fix the parameters */
1372
1373 size = ROUND_SIZE( addr, size );
1374 base = ROUND_ADDR( addr, page_mask );
1375
1376 RtlEnterCriticalSection(&csVirtual);
1377
1378 if (!(view = VIRTUAL_FindView( base )) ||
1379 (base + size > (char *)view->base + view->size) ||
1380 !(view->flags & VFLAG_VALLOC))
1381 {
1382 status = STATUS_INVALID_PARAMETER;
1383 }
1384 else if (type & MEM_SYSTEM)
1385 {
1386 /* return the values that the caller should use to unmap the area */
1387 *addr_ptr = view->base;
1388 *size_ptr = view->size;
1389 view->flags |= VFLAG_SYSTEM;
1390 delete_view( view );
1391 }
1392 else if (type == MEM_RELEASE)
1393 {
1394 /* Free the pages */
1395
1396 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
1397 else
1398 {
1399 delete_view( view );
1400 *addr_ptr = base;
1401 *size_ptr = size;
1402 }
1403 }
1404 else if (type == MEM_DECOMMIT)
1405 {
1406 status = decommit_pages( view, base - (char *)view->base, size );
1407 if (status == STATUS_SUCCESS)
1408 {
1409 *addr_ptr = base;
1410 *size_ptr = size;
1411 }
1412 }
1413 else
1414 {
1415 WARN("called with wrong free type flags (%08lx) !\n", type);
1416 status = STATUS_INVALID_PARAMETER;
1417 }
1418
1419 RtlLeaveCriticalSection(&csVirtual);
1420 return status;
1421 }
1422
1423
1424 /***********************************************************************
1425 * NtProtectVirtualMemory (NTDLL.@)
1426 * ZwProtectVirtualMemory (NTDLL.@)
1427 */
1428 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr,
1429 ULONG new_prot, ULONG *old_prot )
1430 {
1431 FILE_VIEW *view;
1432 NTSTATUS status = STATUS_SUCCESS;
1433 char *base;
1434 UINT i;
1435 BYTE vprot, *p;
1436 ULONG prot;
1437 SIZE_T size = *size_ptr;
1438 LPVOID addr = *addr_ptr;
1439
1440 TRACE("%p %p %08lx %08lx\n", process, addr, size, new_prot );
1441
1442 if (!is_current_process( process ))
1443 {
1444 ERR("Unsupported on other process\n");
1445 return STATUS_ACCESS_DENIED;
1446 }
1447
1448 /* Fix the parameters */
1449
1450 size = ROUND_SIZE( addr, size );
1451 base = ROUND_ADDR( addr, page_mask );
1452
1453 RtlEnterCriticalSection( &csVirtual );
1454
1455 if (!(view = VIRTUAL_FindView( base )) || (base + size > (char *)view->base + view->size))
1456 {
1457 status = STATUS_INVALID_PARAMETER;
1458 }
1459 else
1460 {
1461 /* Make sure all the pages are committed */
1462
1463 p = view->prot + ((base - (char *)view->base) >> page_shift);
1464 VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1465 for (i = size >> page_shift; i; i--, p++)
1466 {
1467 if (!(*p & VPROT_COMMITTED))
1468 {
1469 status = STATUS_NOT_COMMITTED;
1470 break;
1471 }
1472 }
1473 if (!i)
1474 {
1475 if (old_prot) *old_prot = prot;
1476 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1477 if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1478 }
1479 }
1480 RtlLeaveCriticalSection( &csVirtual );
1481
1482 if (status == STATUS_SUCCESS)
1483 {
1484 *addr_ptr = base;
1485 *size_ptr = size;
1486 }
1487 return status;
1488 }
1489
1490 #define UNIMPLEMENTED_INFO_CLASS(c) \
1491 case c: \
1492 FIXME("(process=%p,addr=%p) Unimplemented information class: " #c "\n", process, addr); \
1493 return STATUS_INVALID_INFO_CLASS
1494
1495 /***********************************************************************
1496 * NtQueryVirtualMemory (NTDLL.@)
1497 * ZwQueryVirtualMemory (NTDLL.@)
1498 */
1499 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
1500 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
1501 SIZE_T len, SIZE_T *res_len )
1502 {
1503 FILE_VIEW *view;
1504 char *base, *alloc_base = 0;
1505 struct list *ptr;
1506 SIZE_T size = 0;
1507 MEMORY_BASIC_INFORMATION *info = buffer;
1508
1509 if (info_class != MemoryBasicInformation)
1510 {
1511 switch(info_class)
1512 {
1513 UNIMPLEMENTED_INFO_CLASS(MemoryWorkingSetList);
1514 UNIMPLEMENTED_INFO_CLASS(MemorySectionName);
1515 UNIMPLEMENTED_INFO_CLASS(MemoryBasicVlmInformation);
1516
1517 default:
1518 FIXME("(%p,%p,info_class=%d,%p,%ld,%p) Unknown information class\n",
1519 process, addr, info_class, buffer, len, res_len);
1520 return STATUS_INVALID_INFO_CLASS;
1521 }
1522 }
1523 if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
1524 return STATUS_WORKING_SET_LIMIT_RANGE;
1525
1526 if (!is_current_process( process ))
1527 {
1528 ERR("Unsupported on other process\n");
1529 return STATUS_ACCESS_DENIED;
1530 }
1531
1532 base = ROUND_ADDR( addr, page_mask );
1533
1534 /* Find the view containing the address */
1535
1536 RtlEnterCriticalSection(&csVirtual);
1537 ptr = list_head( &views_list );
1538 for (;;)
1539 {
1540 if (!ptr)
1541 {
1542 /* make the address space end at the user limit, except if
1543 * the last view was mapped beyond that */
1544 if (alloc_base <= (char *)user_space_limit)
1545 {
1546 if (user_space_limit && base >= (char *)user_space_limit)
1547 {
1548 RtlLeaveCriticalSection( &csVirtual );
1549 return STATUS_WORKING_SET_LIMIT_RANGE;
1550 }
1551 size = (char *)user_space_limit - alloc_base;
1552 }
1553 else size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1554 view = NULL;
1555 break;
1556 }
1557 view = LIST_ENTRY( ptr, struct file_view, entry );
1558 if ((char *)view->base > base)
1559 {
1560 size = (char *)view->base - alloc_base;
1561 view = NULL;
1562 break;
1563 }
1564 if ((char *)view->base + view->size > base)
1565 {
1566 alloc_base = view->base;
1567 size = view->size;
1568 break;
1569 }
1570 alloc_base = (char *)view->base + view->size;
1571 ptr = list_next( &views_list, ptr );
1572 }
1573
1574 /* Fill the info structure */
1575
1576 if (!view)
1577 {
1578 info->State = MEM_FREE;
1579 info->Protect = 0;
1580 info->AllocationProtect = 0;
1581 info->Type = 0;
1582 }
1583 else
1584 {
1585 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1586 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1587 for (size = base - alloc_base; size < view->size; size += page_mask+1)
1588 if (view->prot[size >> page_shift] != vprot) break;
1589 VIRTUAL_GetWin32Prot( view->protect, &info->AllocationProtect, NULL );
1590 if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
1591 else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
1592 else info->Type = MEM_MAPPED;
1593 }
1594 RtlLeaveCriticalSection(&csVirtual);
1595
1596 info->BaseAddress = (LPVOID)base;
1597 info->AllocationBase = (LPVOID)alloc_base;
1598 info->RegionSize = size - (base - alloc_base);
1599 if (res_len) *res_len = sizeof(*info);
1600 return STATUS_SUCCESS;
1601 }
1602
1603
1604 /***********************************************************************
1605 * NtLockVirtualMemory (NTDLL.@)
1606 * ZwLockVirtualMemory (NTDLL.@)
1607 */
1608 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1609 {
1610 if (!is_current_process( process ))
1611 {
1612 ERR("Unsupported on other process\n");
1613 return STATUS_ACCESS_DENIED;
1614 }
1615 return STATUS_SUCCESS;
1616 }
1617
1618
1619 /***********************************************************************
1620 * NtUnlockVirtualMemory (NTDLL.@)
1621 * ZwUnlockVirtualMemory (NTDLL.@)
1622 */
1623 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1624 {
1625 if (!is_current_process( process ))
1626 {
1627 ERR("Unsupported on other process\n");
1628 return STATUS_ACCESS_DENIED;
1629 }
1630 return STATUS_SUCCESS;
1631 }
1632
1633
1634 /***********************************************************************
1635 * NtCreateSection (NTDLL.@)
1636 * ZwCreateSection (NTDLL.@)
1637 */
1638 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
1639 const LARGE_INTEGER *size, ULONG protect,
1640 ULONG sec_flags, HANDLE file )
1641 {
1642 NTSTATUS ret;
1643 BYTE vprot;
1644 DWORD len = (attr && attr->ObjectName) ? attr->ObjectName->Length : 0;
1645
1646 /* Check parameters */
1647
1648 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1649
1650 vprot = VIRTUAL_GetProt( protect );
1651 if (sec_flags & SEC_RESERVE)
1652 {
1653 if (file) return STATUS_INVALID_PARAMETER;
1654 }
1655 else vprot |= VPROT_COMMITTED;
1656 if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1657 if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
1658
1659 /* Create the server object */
1660
1661 SERVER_START_REQ( create_mapping )
1662 {
1663 req->access = access;
1664 req->attributes = (attr) ? attr->Attributes : 0;
1665 req->rootdir = attr ? attr->RootDirectory : 0;
1666 req->file_handle = file;
1667 req->size_high = size ? size->u.HighPart : 0;
1668 req->size_low = size ? size->u.LowPart : 0;
1669 req->protect = vprot;
1670 if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
1671 ret = wine_server_call( req );
1672 *handle = reply->handle;
1673 }
1674 SERVER_END_REQ;
1675 return ret;
1676 }
1677
1678
1679 /***********************************************************************
1680 * NtOpenSection (NTDLL.@)
1681 * ZwOpenSection (NTDLL.@)
1682 */
1683 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
1684 {
1685 NTSTATUS ret;
1686 DWORD len = attr->ObjectName->Length;
1687
1688 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1689
1690 SERVER_START_REQ( open_mapping )
1691 {
1692 req->access = access;
1693 req->attributes = (attr) ? attr->Attributes : 0;
1694 req->rootdir = attr ? attr->RootDirectory : 0;
1695 wine_server_add_data( req, attr->ObjectName->Buffer, len );
1696 if (!(ret = wine_server_call( req ))) *handle = reply->handle;
1697 }
1698 SERVER_END_REQ;
1699 return ret;
1700 }
1701
1702
1703 /***********************************************************************
1704 * NtMapViewOfSection (NTDLL.@)
1705 * ZwMapViewOfSection (NTDLL.@)
1706 */
1707 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
1708 SIZE_T commit_size, const LARGE_INTEGER *offset_ptr, SIZE_T *size_ptr,
1709 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
1710 {
1711 FILE_FS_DEVICE_INFORMATION device_info;
1712 NTSTATUS res;
1713 SIZE_T size = 0;
1714 int unix_handle = -1;
1715 int prot;
1716 void *base;
1717 struct file_view *view;
1718 DWORD size_low, size_high, header_size, shared_size;
1719 HANDLE shared_file;
1720 BOOL removable = FALSE;
1721 LARGE_INTEGER offset;
1722
1723 offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
1724
1725 TRACE("handle=%p process=%p addr=%p off=%lx%08lx size=%lx access=%lx\n",
1726 handle, process, *addr_ptr, offset.u.HighPart, offset.u.LowPart, size, protect );
1727
1728 if (!is_current_process( process ))
1729 {
1730 ERR("Unsupported on other process\n");
1731 return STATUS_ACCESS_DENIED;
1732 }
1733
1734 /* Check parameters */
1735
1736 if ((offset.u.LowPart & granularity_mask) ||
1737 (*addr_ptr && ((UINT_PTR)*addr_ptr & granularity_mask)))
1738 return STATUS_INVALID_PARAMETER;
1739
1740 SERVER_START_REQ( get_mapping_info )
1741 {
1742 req->handle = handle;
1743 res = wine_server_call( req );
1744 prot = reply->protect;
1745 base = reply->base;
1746 size_low = reply->size_low;
1747 size_high = reply->size_high;
1748 header_size = reply->header_size;
1749 shared_file = reply->shared_file;
1750 shared_size = reply->shared_size;
1751 }
1752 SERVER_END_REQ;
1753 if (res) return res;
1754
1755 if ((res = wine_server_handle_to_fd( handle, 0, &unix_handle, NULL ))) return res;
1756
1757 if (FILE_GetDeviceInfo( unix_handle, &device_info ) == STATUS_SUCCESS)
1758 removable = device_info.Characteristics & FILE_REMOVABLE_MEDIA;
1759
1760 if (prot & VPROT_IMAGE)
1761 {
1762 if (shared_file)
1763 {
1764 int shared_fd;
1765
1766 if ((res = wine_server_handle_to_fd( shared_file, GENERIC_READ, &shared_fd,
1767 NULL ))) goto done;
1768 res = map_image( handle, unix_handle, base, size_low, header_size,
1769 shared_fd, removable, addr_ptr );
1770 wine_server_release_fd( shared_file, shared_fd );
1771 NtClose( shared_file );
1772 }
1773 else
1774 {
1775 res = map_image( handle, unix_handle, base, size_low, header_size,
1776 -1, removable, addr_ptr );
1777 }
1778 wine_server_release_fd( handle, unix_handle );
1779 if (!res) *size_ptr = size_low;
1780 return res;
1781 }
1782
1783 if (size_high)
1784 ERR("Sizes larger than 4Gb not supported\n");
1785
1786 if ((offset.u.LowPart >= size_low) ||
1787 (*size_ptr > size_low - offset.u.LowPart))
1788 {
1789 res = STATUS_INVALID_PARAMETER;
1790 goto done;
1791 }
1792 if (*size_ptr) size = ROUND_SIZE( offset.u.LowPart, *size_ptr );
1793 else size = size_low - offset.u.LowPart;
1794
1795 switch(protect)
1796 {
1797 case PAGE_NOACCESS:
1798 break;
1799 case PAGE_READWRITE:
1800 case PAGE_EXECUTE_READWRITE:
1801 if (!(prot & VPROT_WRITE))
1802 {
1803 res = STATUS_INVALID_PARAMETER;
1804 goto done;
1805 }
1806 removable = FALSE;
1807 /* fall through */
1808 case PAGE_READONLY:
1809 case PAGE_WRITECOPY:
1810 case PAGE_EXECUTE:
1811 case PAGE_EXECUTE_READ:
1812 case PAGE_EXECUTE_WRITECOPY:
1813 if (prot & VPROT_READ) break;
1814 /* fall through */
1815 default:
1816 res = STATUS_INVALID_PARAMETER;
1817 goto done;
1818 }
1819
1820 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1821 * which has a view of this mapping commits some pages, they will
1822 * appear commited in all other processes, which have the same
1823 * view created. Since we don`t support this yet, we create the
1824 * whole mapping commited.
1825 */
1826 prot |= VPROT_COMMITTED;
1827
1828 /* Reserve a properly aligned area */
1829
1830 RtlEnterCriticalSection( &csVirtual );
1831
1832 res = map_view( &view, *addr_ptr, size, prot );
1833 if (res)
1834 {
1835 RtlLeaveCriticalSection( &csVirtual );
1836 goto done;
1837 }
1838
1839 /* Map the file */
1840
1841 TRACE("handle=%p size=%lx offset=%lx%08lx\n",
1842 handle, size, offset.u.HighPart, offset.u.LowPart );
1843
1844 res = map_file_into_view( view, unix_handle, 0, size, offset.QuadPart, prot, removable );
1845 if (res == STATUS_SUCCESS)
1846 {
1847 if (!removable) /* don't keep handle open on removable media */
1848 NtDuplicateObject( NtCurrentProcess(), handle,
1849 NtCurrentProcess(), &view->mapping,
1850 0, 0, DUPLICATE_SAME_ACCESS );
1851
1852 *addr_ptr = view->base;
1853 *size_ptr = size;
1854 }
1855 else
1856 {
1857 ERR( "map_file_into_view %p %lx %lx%08lx failed\n",
1858 view->base, size, offset.u.HighPart, offset.u.LowPart );
1859 delete_view( view );
1860 }
1861
1862 RtlLeaveCriticalSection( &csVirtual );
1863
1864 done:
1865 wine_server_release_fd( handle, unix_handle );
1866 return res;
1867 }
1868
1869
1870 /***********************************************************************
1871 * NtUnmapViewOfSection (NTDLL.@)
1872 * ZwUnmapViewOfSection (NTDLL.@)
1873 */
1874 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
1875 {
1876 FILE_VIEW *view;
1877 NTSTATUS status = STATUS_INVALID_PARAMETER;
1878 void *base = ROUND_ADDR( addr, page_mask );
1879
1880 if (!is_current_process( process ))
1881 {
1882 ERR("Unsupported on other process\n");
1883 return STATUS_ACCESS_DENIED;
1884 }
1885 RtlEnterCriticalSection( &csVirtual );
1886 if ((view = VIRTUAL_FindView( base )) && (base == view->base))
1887 {
1888 delete_view( view );
1889 status = STATUS_SUCCESS;
1890 }
1891 RtlLeaveCriticalSection( &csVirtual );
1892 return status;
1893 }
1894
1895
1896 /***********************************************************************
1897 * NtFlushVirtualMemory (NTDLL.@)
1898 * ZwFlushVirtualMemory (NTDLL.@)
1899 */
1900 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
1901 SIZE_T *size_ptr, ULONG unknown )
1902 {
1903 FILE_VIEW *view;
1904 NTSTATUS status = STATUS_SUCCESS;
1905 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
1906
1907 if (!is_current_process( process ))
1908 {
1909 ERR("Unsupported on other process\n");
1910 return STATUS_ACCESS_DENIED;
1911 }
1912 RtlEnterCriticalSection( &csVirtual );
1913 if (!(view = VIRTUAL_FindView( addr ))) status = STATUS_INVALID_PARAMETER;
1914 else
1915 {
1916 if (!*size_ptr) *size_ptr = view->size;
1917 *addr_ptr = addr;
1918 if (msync( addr, *size_ptr, MS_SYNC )) status = STATUS_NOT_MAPPED_DATA;
1919 }
1920 RtlLeaveCriticalSection( &csVirtual );
1921 return status;
1922 }
1923
1924
1925 /***********************************************************************
1926 * NtReadVirtualMemory (NTDLL.@)
1927 * ZwReadVirtualMemory (NTDLL.@)
1928 */
1929 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
1930 SIZE_T size, SIZE_T *bytes_read )
1931 {
1932 NTSTATUS status;
1933
1934 SERVER_START_REQ( read_process_memory )
1935 {
1936 req->handle = process;
1937 req->addr = (void *)addr;
1938 wine_server_set_reply( req, buffer, size );
1939 if ((status = wine_server_call( req ))) size = 0;
1940 }
1941 SERVER_END_REQ;
1942 if (bytes_read) *bytes_read = size;
1943 return status;
1944 }
1945
1946
1947 /***********************************************************************
1948 * NtWriteVirtualMemory (NTDLL.@)
1949 * ZwWriteVirtualMemory (NTDLL.@)
1950 */
1951 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
1952 SIZE_T size, SIZE_T *bytes_written )
1953 {
1954 static const unsigned int zero;
1955 SIZE_T first_offset, last_offset, first_mask, last_mask;
1956 NTSTATUS status;
1957
1958 if (!size) return STATUS_INVALID_PARAMETER;
1959
1960 /* compute the mask for the first int */
1961 first_mask = ~0;
1962 first_offset = (ULONG_PTR)addr % sizeof(int);
1963 memset( &first_mask, 0, first_offset );
1964
1965 /* compute the mask for the last int */
1966 last_offset = (size + first_offset) % sizeof(int);
1967 last_mask = 0;
1968 memset( &last_mask, 0xff, last_offset ? last_offset : sizeof(int) );
1969
1970 SERVER_START_REQ( write_process_memory )
1971 {
1972 req->handle = process;
1973 req->addr = (char *)addr - first_offset;
1974 req->first_mask = first_mask;
1975 req->last_mask = last_mask;
1976 if (first_offset) wine_server_add_data( req, &zero, first_offset );
1977 wine_server_add_data( req, buffer, size );
1978 if (last_offset) wine_server_add_data( req, &zero, sizeof(int) - last_offset );
1979
1980 if ((status = wine_server_call( req ))) size = 0;
1981 }
1982 SERVER_END_REQ;
1983 if (bytes_written) *bytes_written = size;
1984 return status;
1985 }