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Release 20050930.
[wine/gsoc-2012-control.git] / dlls / ntdll / virtual.c
blob277ea6a672922f23bb034a228b9e5871b5ff9123
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 #include "windef.h"
46 #include "winternl.h"
47 #include "winioctl.h"
48 #include "wine/library.h"
49 #include "wine/server.h"
50 #include "wine/list.h"
51 #include "wine/debug.h"
52 #include "ntdll_misc.h"
53
54 WINE_DEFAULT_DEBUG_CHANNEL(virtual);
55 WINE_DECLARE_DEBUG_CHANNEL(module);
56
57 #ifndef MS_SYNC
58 #define MS_SYNC 0
59 #endif
60
61 #ifndef MAP_NORESERVE
62 #define MAP_NORESERVE 0
63 #endif
64
65 /* File view */
66 typedef struct file_view
67 {
68 struct list entry; /* Entry in global view list */
69 void *base; /* Base address */
70 size_t size; /* Size in bytes */
71 HANDLE mapping; /* Handle to the file mapping */
72 BYTE flags; /* Allocation flags (VFLAG_*) */
73 BYTE protect; /* Protection for all pages at allocation time */
74 BYTE prot[1]; /* Protection byte for each page */
75 } FILE_VIEW;
76
77 /* Per-view flags */
78 #define VFLAG_SYSTEM 0x01 /* system view (underlying mmap not under our control) */
79 #define VFLAG_VALLOC 0x02 /* allocated by VirtualAlloc */
80
81 /* Conversion from VPROT_* to Win32 flags */
82 static const BYTE VIRTUAL_Win32Flags[16] =
83 {
84 PAGE_NOACCESS, /* 0 */
85 PAGE_READONLY, /* READ */
86 PAGE_READWRITE, /* WRITE */
87 PAGE_READWRITE, /* READ | WRITE */
88 PAGE_EXECUTE, /* EXEC */
89 PAGE_EXECUTE_READ, /* READ | EXEC */
90 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
91 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
92 PAGE_WRITECOPY, /* WRITECOPY */
93 PAGE_WRITECOPY, /* READ | WRITECOPY */
94 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
95 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
96 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
97 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
98 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
99 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
100 };
101
102 static struct list views_list = LIST_INIT(views_list);
103
104 static RTL_CRITICAL_SECTION csVirtual;
105 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
106 {
107 0, 0, &csVirtual,
108 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
109 0, 0, { (DWORD_PTR)(__FILE__ ": csVirtual") }
110 };
111 static RTL_CRITICAL_SECTION csVirtual = { &critsect_debug, -1, 0, 0, 0, 0 };
112
113 #ifdef __i386__
114 /* These are always the same on an i386, and it will be faster this way */
115 # define page_mask 0xfff
116 # define page_shift 12
117 # define page_size 0x1000
118 /* Note: these are Windows limits, you cannot change them. */
119 # define ADDRESS_SPACE_LIMIT ((void *)0xc0000000) /* top of the total available address space */
120 # define USER_SPACE_LIMIT ((void *)0x80000000) /* top of the user address space */
121 #else
122 static UINT page_shift;
123 static UINT page_size;
124 static UINT_PTR page_mask;
125 # define ADDRESS_SPACE_LIMIT 0 /* no limit needed on other platforms */
126 # define USER_SPACE_LIMIT 0 /* no limit needed on other platforms */
127 #endif /* __i386__ */
128 static const UINT_PTR granularity_mask = 0xffff; /* Allocation granularity (usually 64k) */
129
130 #define ROUND_ADDR(addr,mask) \
131 ((void *)((UINT_PTR)(addr) & ~(UINT_PTR)(mask)))
132
133 #define ROUND_SIZE(addr,size) \
134 (((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
135
136 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
137 do { if (TRACE_ON(virtual)) VIRTUAL_DumpView(view); } while (0)
138
139 static void *user_space_limit = USER_SPACE_LIMIT;
140
141
142 /***********************************************************************
143 * VIRTUAL_GetProtStr
144 */
145 static const char *VIRTUAL_GetProtStr( BYTE prot )
146 {
147 static char buffer[6];
148 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
149 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
150 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
151 buffer[3] = (prot & VPROT_WRITECOPY) ? 'W' : ((prot & VPROT_WRITE) ? 'w' : '-');
152 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
153 buffer[5] = 0;
154 return buffer;
155 }
156
157
158 /***********************************************************************
159 * VIRTUAL_DumpView
160 */
161 static void VIRTUAL_DumpView( FILE_VIEW *view )
162 {
163 UINT i, count;
164 char *addr = view->base;
165 BYTE prot = view->prot[0];
166
167 TRACE( "View: %p - %p", addr, addr + view->size - 1 );
168 if (view->flags & VFLAG_SYSTEM)
169 TRACE( " (system)\n" );
170 else if (view->flags & VFLAG_VALLOC)
171 TRACE( " (valloc)\n" );
172 else if (view->mapping)
173 TRACE( " %p\n", view->mapping );
174 else
175 TRACE( " (anonymous)\n");
176
177 for (count = i = 1; i < view->size >> page_shift; i++, count++)
178 {
179 if (view->prot[i] == prot) continue;
180 TRACE( " %p - %p %s\n",
181 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
182 addr += (count << page_shift);
183 prot = view->prot[i];
184 count = 0;
185 }
186 if (count)
187 TRACE( " %p - %p %s\n",
188 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
189 }
190
191
192 /***********************************************************************
193 * VIRTUAL_Dump
194 */
195 void VIRTUAL_Dump(void)
196 {
197 struct file_view *view;
198
199 TRACE( "Dump of all virtual memory views:\n" );
200 RtlEnterCriticalSection(&csVirtual);
201 LIST_FOR_EACH_ENTRY( view, &views_list, FILE_VIEW, entry )
202 {
203 VIRTUAL_DumpView( view );
204 }
205 RtlLeaveCriticalSection(&csVirtual);
206 }
207
208
209 /***********************************************************************
210 * VIRTUAL_FindView
211 *
212 * Find the view containing a given address. The csVirtual section must be held by caller.
213 *
214 * PARAMS
215 * addr [I] Address
216 *
217 * RETURNS
218 * View: Success
219 * NULL: Failure
220 */
221 static struct file_view *VIRTUAL_FindView( const void *addr )
222 {
223 struct file_view *view;
224
225 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
226 {
227 if (view->base > addr) break;
228 if ((const char*)view->base + view->size > (const char*)addr) return view;
229 }
230 return NULL;
231 }
232
233
234 /***********************************************************************
235 * find_view_range
236 *
237 * Find the first view overlapping at least part of the specified range.
238 * The csVirtual section must be held by caller.
239 */
240 static struct file_view *find_view_range( const void *addr, size_t size )
241 {
242 struct file_view *view;
243
244 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
245 {
246 if ((const char *)view->base >= (const char *)addr + size) break;
247 if ((const char *)view->base + view->size > (const char *)addr) return view;
248 }
249 return NULL;
250 }
251
252
253 /***********************************************************************
254 * add_reserved_area
255 *
256 * Add a reserved area to the list maintained by libwine.
257 * The csVirtual section must be held by caller.
258 */
259 static void add_reserved_area( void *addr, size_t size )
260 {
261 TRACE( "adding %p-%p\n", addr, (char *)addr + size );
262
263 if (addr < user_space_limit)
264 {
265 /* unmap the part of the area that is below the limit */
266 assert( (char *)addr + size > (char *)user_space_limit );
267 munmap( addr, (char *)user_space_limit - (char *)addr );
268 size -= (char *)user_space_limit - (char *)addr;
269 addr = user_space_limit;
270 }
271 /* blow away existing mappings */
272 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
273 wine_mmap_add_reserved_area( addr, size );
274 }
275
276
277 /***********************************************************************
278 * remove_reserved_area
279 *
280 * Remove a reserved area from the list maintained by libwine.
281 * The csVirtual section must be held by caller.
282 */
283 static void remove_reserved_area( void *addr, size_t size )
284 {
285 struct file_view *view;
286
287 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
288 {
289 if ((char *)view->base >= (char *)addr + size) break;
290 if ((char *)view->base + view->size <= (char *)addr) continue;
291 /* now we have an overlapping view */
292 if (view->base > addr)
293 {
294 wine_mmap_remove_reserved_area( addr, (char *)view->base - (char *)addr, TRUE );
295 size -= (char *)view->base - (char *)addr;
296 addr = view->base;
297 }
298 if ((char *)view->base + view->size >= (char *)addr + size)
299 {
300 /* view covers all the remaining area */
301 wine_mmap_remove_reserved_area( addr, size, FALSE );
302 size = 0;
303 break;
304 }
305 else /* view covers only part of the area */
306 {
307 wine_mmap_remove_reserved_area( addr, (char *)view->base + view->size - (char *)addr, FALSE );
308 size -= (char *)view->base + view->size - (char *)addr;
309 addr = (char *)view->base + view->size;
310 }
311 }
312 /* remove remaining space */
313 if (size) wine_mmap_remove_reserved_area( addr, size, TRUE );
314 }
315
316
317 /***********************************************************************
318 * is_beyond_limit
319 *
320 * Check if an address range goes beyond a given limit.
321 */
322 static inline int is_beyond_limit( void *addr, size_t size, void *limit )
323 {
324 return (limit && (addr >= limit || (char *)addr + size > (char *)limit));
325 }
326
327
328 /***********************************************************************
329 * unmap_area
330 *
331 * Unmap an area, or simply replace it by an empty mapping if it is
332 * in a reserved area. The csVirtual section must be held by caller.
333 */
334 static inline void unmap_area( void *addr, size_t size )
335 {
336 if (wine_mmap_is_in_reserved_area( addr, size ))
337 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
338 else
339 munmap( addr, size );
340 }
341
342
343 /***********************************************************************
344 * delete_view
345 *
346 * Deletes a view. The csVirtual section must be held by caller.
347 */
348 static void delete_view( struct file_view *view ) /* [in] View */
349 {
350 if (!(view->flags & VFLAG_SYSTEM)) unmap_area( view->base, view->size );
351 list_remove( &view->entry );
352 if (view->mapping) NtClose( view->mapping );
353 free( view );
354 }
355
356
357 /***********************************************************************
358 * create_view
359 *
360 * Create a view. The csVirtual section must be held by caller.
361 */
362 static NTSTATUS create_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
363 {
364 struct file_view *view;
365 struct list *ptr;
366
367 assert( !((UINT_PTR)base & page_mask) );
368 assert( !(size & page_mask) );
369
370 /* Create the view structure */
371
372 if (!(view = malloc( sizeof(*view) + (size >> page_shift) - 1 ))) return STATUS_NO_MEMORY;
373
374 view->base = base;
375 view->size = size;
376 view->flags = 0;
377 view->mapping = 0;
378 view->protect = vprot;
379 memset( view->prot, vprot, size >> page_shift );
380
381 /* Insert it in the linked list */
382
383 LIST_FOR_EACH( ptr, &views_list )
384 {
385 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
386 if (next->base > base) break;
387 }
388 list_add_before( ptr, &view->entry );
389
390 /* Check for overlapping views. This can happen if the previous view
391 * was a system view that got unmapped behind our back. In that case
392 * we recover by simply deleting it. */
393
394 if ((ptr = list_prev( &views_list, &view->entry )) != NULL)
395 {
396 struct file_view *prev = LIST_ENTRY( ptr, struct file_view, entry );
397 if ((char *)prev->base + prev->size > (char *)base)
398 {
399 TRACE( "overlapping prev view %p-%p for %p-%p\n",
400 prev->base, (char *)prev->base + prev->size,
401 base, (char *)base + view->size );
402 assert( prev->flags & VFLAG_SYSTEM );
403 delete_view( prev );
404 }
405 }
406 if ((ptr = list_next( &views_list, &view->entry )) != NULL)
407 {
408 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
409 if ((char *)base + view->size > (char *)next->base)
410 {
411 TRACE( "overlapping next view %p-%p for %p-%p\n",
412 next->base, (char *)next->base + next->size,
413 base, (char *)base + view->size );
414 assert( next->flags & VFLAG_SYSTEM );
415 delete_view( next );
416 }
417 }
418
419 *view_ret = view;
420 VIRTUAL_DEBUG_DUMP_VIEW( view );
421 return STATUS_SUCCESS;
422 }
423
424
425 /***********************************************************************
426 * VIRTUAL_GetUnixProt
427 *
428 * Convert page protections to protection for mmap/mprotect.
429 */
430 static int VIRTUAL_GetUnixProt( BYTE vprot )
431 {
432 int prot = 0;
433 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
434 {
435 if (vprot & VPROT_READ) prot |= PROT_READ;
436 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
437 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
438 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
439 }
440 return prot;
441 }
442
443
444 /***********************************************************************
445 * VIRTUAL_GetWin32Prot
446 *
447 * Convert page protections to Win32 flags.
448 *
449 * RETURNS
450 * None
451 */
452 static void VIRTUAL_GetWin32Prot(
453 BYTE vprot, /* [in] Page protection flags */
454 DWORD *protect, /* [out] Location to store Win32 protection flags */
455 DWORD *state ) /* [out] Location to store mem state flag */
456 {
457 if (protect) {
458 *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
459 if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
460 if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS | PAGE_GUARD;
461 }
462
463 if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
464 }
465
466
467 /***********************************************************************
468 * VIRTUAL_GetProt
469 *
470 * Build page protections from Win32 flags.
471 *
472 * PARAMS
473 * protect [I] Win32 protection flags
474 *
475 * RETURNS
476 * Value of page protection flags
477 */
478 static BYTE VIRTUAL_GetProt( DWORD protect )
479 {
480 BYTE vprot;
481
482 switch(protect & 0xff)
483 {
484 case PAGE_READONLY:
485 vprot = VPROT_READ;
486 break;
487 case PAGE_READWRITE:
488 vprot = VPROT_READ | VPROT_WRITE;
489 break;
490 case PAGE_WRITECOPY:
491 /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
492 * that the hFile must have been opened with GENERIC_READ and
493 * GENERIC_WRITE access. This is WRONG as tests show that you
494 * only need GENERIC_READ access (at least for Win9x,
495 * FIXME: what about NT?). Thus, we don't put VPROT_WRITE in
496 * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
497 */
498 vprot = VPROT_READ | VPROT_WRITECOPY;
499 break;
500 case PAGE_EXECUTE:
501 vprot = VPROT_EXEC;
502 break;
503 case PAGE_EXECUTE_READ:
504 vprot = VPROT_EXEC | VPROT_READ;
505 break;
506 case PAGE_EXECUTE_READWRITE:
507 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
508 break;
509 case PAGE_EXECUTE_WRITECOPY:
510 /* See comment for PAGE_WRITECOPY above */
511 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
512 break;
513 case PAGE_NOACCESS:
514 default:
515 vprot = 0;
516 break;
517 }
518 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
519 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
520 return vprot;
521 }
522
523
524 /***********************************************************************
525 * VIRTUAL_SetProt
526 *
527 * Change the protection of a range of pages.
528 *
529 * RETURNS
530 * TRUE: Success
531 * FALSE: Failure
532 */
533 static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
534 void *base, /* [in] Starting address */
535 size_t size, /* [in] Size in bytes */
536 BYTE vprot ) /* [in] Protections to use */
537 {
538 TRACE("%p-%p %s\n",
539 base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
540
541 if (mprotect( base, size, VIRTUAL_GetUnixProt(vprot) ))
542 return FALSE; /* FIXME: last error */
543
544 memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
545 vprot, size >> page_shift );
546 VIRTUAL_DEBUG_DUMP_VIEW( view );
547 return TRUE;
548 }
549
550
551 /***********************************************************************
552 * unmap_extra_space
553 *
554 * Release the extra memory while keeping the range starting on the granularity boundary.
555 */
556 static inline void *unmap_extra_space( void *ptr, size_t total_size, size_t wanted_size, size_t mask )
557 {
558 if ((ULONG_PTR)ptr & mask)
559 {
560 size_t extra = mask + 1 - ((ULONG_PTR)ptr & mask);
561 munmap( ptr, extra );
562 ptr = (char *)ptr + extra;
563 total_size -= extra;
564 }
565 if (total_size > wanted_size)
566 munmap( (char *)ptr + wanted_size, total_size - wanted_size );
567 return ptr;
568 }
569
570
571 /***********************************************************************
572 * map_view
573 *
574 * Create a view and mmap the corresponding memory area.
575 * The csVirtual section must be held by caller.
576 */
577 static NTSTATUS map_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
578 {
579 void *ptr;
580 NTSTATUS status;
581
582 if (base)
583 {
584 if (is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
585 return STATUS_WORKING_SET_LIMIT_RANGE;
586
587 switch (wine_mmap_is_in_reserved_area( base, size ))
588 {
589 case -1: /* partially in a reserved area */
590 return STATUS_CONFLICTING_ADDRESSES;
591
592 case 0: /* not in a reserved area, do a normal allocation */
593 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
594 {
595 if (errno == ENOMEM) return STATUS_NO_MEMORY;
596 return STATUS_INVALID_PARAMETER;
597 }
598 if (ptr != base)
599 {
600 /* We couldn't get the address we wanted */
601 if (is_beyond_limit( ptr, size, user_space_limit )) add_reserved_area( ptr, size );
602 else munmap( ptr, size );
603 return STATUS_CONFLICTING_ADDRESSES;
604 }
605 break;
606
607 default:
608 case 1: /* in a reserved area, make sure the address is available */
609 if (find_view_range( base, size )) return STATUS_CONFLICTING_ADDRESSES;
610 /* replace the reserved area by our mapping */
611 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED )) != base)
612 return STATUS_INVALID_PARAMETER;
613 break;
614 }
615 }
616 else
617 {
618 size_t view_size = size + granularity_mask + 1;
619
620 for (;;)
621 {
622 if ((ptr = wine_anon_mmap( NULL, view_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
623 {
624 if (errno == ENOMEM) return STATUS_NO_MEMORY;
625 return STATUS_INVALID_PARAMETER;
626 }
627 /* if we got something beyond the user limit, unmap it and retry */
628 if (is_beyond_limit( ptr, view_size, user_space_limit )) add_reserved_area( ptr, view_size );
629 else break;
630 }
631 ptr = unmap_extra_space( ptr, view_size, size, granularity_mask );
632 }
633
634 status = create_view( view_ret, ptr, size, vprot );
635 if (status != STATUS_SUCCESS) unmap_area( ptr, size );
636 return status;
637 }
638
639
640 /***********************************************************************
641 * unaligned_mmap
642 *
643 * Linux kernels before 2.4.x can support non page-aligned offsets, as
644 * long as the offset is aligned to the filesystem block size. This is
645 * a big performance gain so we want to take advantage of it.
646 *
647 * However, when we use 64-bit file support this doesn't work because
648 * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
649 * in that it rounds unaligned offsets down to a page boundary. For
650 * these reasons we do a direct system call here.
651 */
652 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
653 unsigned int flags, int fd, off_t offset )
654 {
655 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
656 if (!(offset >> 32) && (offset & page_mask))
657 {
658 int ret;
659
660 struct
661 {
662 void *addr;
663 unsigned int length;
664 unsigned int prot;
665 unsigned int flags;
666 unsigned int fd;
667 unsigned int offset;
668 } args;
669
670 args.addr = addr;
671 args.length = length;
672 args.prot = prot;
673 args.flags = flags;
674 args.fd = fd;
675 args.offset = offset;
676
677 __asm__ __volatile__("push %%ebx\n\t"
678 "movl %2,%%ebx\n\t"
679 "int $0x80\n\t"
680 "popl %%ebx"
681 : "=a" (ret)
682 : "0" (90), /* SYS_mmap */
683 "q" (&args)
684 : "memory" );
685 if (ret < 0 && ret > -4096)
686 {
687 errno = -ret;
688 ret = -1;
689 }
690 return (void *)ret;
691 }
692 #endif
693 return mmap( addr, length, prot, flags, fd, offset );
694 }
695
696
697 /***********************************************************************
698 * map_file_into_view
699 *
700 * Wrapper for mmap() to map a file into a view, falling back to read if mmap fails.
701 * The csVirtual section must be held by caller.
702 */
703 static NTSTATUS map_file_into_view( struct file_view *view, int fd, size_t start, size_t size,
704 off_t offset, BYTE vprot, BOOL removable )
705 {
706 void *ptr;
707 int prot = VIRTUAL_GetUnixProt( vprot );
708 BOOL shared_write = (vprot & VPROT_WRITE) != 0;
709
710 assert( start < view->size );
711 assert( start + size <= view->size );
712
713 /* only try mmap if media is not removable (or if we require write access) */
714 if (!removable || shared_write)
715 {
716 int flags = MAP_FIXED | (shared_write ? MAP_SHARED : MAP_PRIVATE);
717
718 if (unaligned_mmap( (char *)view->base + start, size, prot, flags, fd, offset ) != (void *)-1)
719 goto done;
720
721 /* mmap() failed; if this is because the file offset is not */
722 /* page-aligned (EINVAL), or because the underlying filesystem */
723 /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
724 if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return FILE_GetNtStatus();
725 if (shared_write) return FILE_GetNtStatus(); /* we cannot fake shared write mappings */
726 }
727
728 /* Reserve the memory with an anonymous mmap */
729 ptr = wine_anon_mmap( (char *)view->base + start, size, PROT_READ | PROT_WRITE, MAP_FIXED );
730 if (ptr == (void *)-1) return FILE_GetNtStatus();
731 /* Now read in the file */
732 pread( fd, ptr, size, offset );
733 if (prot != (PROT_READ|PROT_WRITE)) mprotect( ptr, size, prot ); /* Set the right protection */
734 done:
735 memset( view->prot + (start >> page_shift), vprot, size >> page_shift );
736 return STATUS_SUCCESS;
737 }
738
739
740 /***********************************************************************
741 * decommit_view
742 *
743 * Decommit some pages of a given view.
744 * The csVirtual section must be held by caller.
745 */
746 static NTSTATUS decommit_pages( struct file_view *view, size_t start, size_t size )
747 {
748 if (wine_anon_mmap( (char *)view->base + start, size, PROT_NONE, MAP_FIXED ) != (void *)-1)
749 {
750 BYTE *p = view->prot + (start >> page_shift);
751 size >>= page_shift;
752 while (size--) *p++ &= ~VPROT_COMMITTED;
753 return STATUS_SUCCESS;
754 }
755 return FILE_GetNtStatus();
756 }
757
758
759 /***********************************************************************
760 * do_relocations
761 *
762 * Apply the relocations to a mapped PE image
763 */
764 static int do_relocations( char *base, const IMAGE_DATA_DIRECTORY *dir,
765 int delta, SIZE_T total_size )
766 {
767 IMAGE_BASE_RELOCATION *rel;
768
769 TRACE_(module)( "relocating from %p-%p to %p-%p\n",
770 base - delta, base - delta + total_size, base, base + total_size );
771
772 for (rel = (IMAGE_BASE_RELOCATION *)(base + dir->VirtualAddress);
773 ((char *)rel < base + dir->VirtualAddress + dir->Size) && rel->SizeOfBlock;
774 rel = (IMAGE_BASE_RELOCATION*)((char*)rel + rel->SizeOfBlock) )
775 {
776 char *page = base + rel->VirtualAddress;
777 WORD *TypeOffset = (WORD *)(rel + 1);
778 int i, count = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(*TypeOffset);
779
780 if (!count) continue;
781
782 /* sanity checks */
783 if ((char *)rel + rel->SizeOfBlock > base + dir->VirtualAddress + dir->Size)
784 {
785 ERR_(module)("invalid relocation %p,%lx,%ld at %p,%lx,%lx\n",
786 rel, rel->VirtualAddress, rel->SizeOfBlock,
787 base, dir->VirtualAddress, dir->Size );
788 return 0;
789 }
790
791 if (page > base + total_size)
792 {
793 WARN_(module)("skipping %d relocations for page %p beyond module %p-%p\n",
794 count, page, base, base + total_size );
795 continue;
796 }
797
798 TRACE_(module)("%d relocations for page %lx\n", count, rel->VirtualAddress);
799
800 /* patching in reverse order */
801 for (i = 0 ; i < count; i++)
802 {
803 int offset = TypeOffset[i] & 0xFFF;
804 int type = TypeOffset[i] >> 12;
805 switch(type)
806 {
807 case IMAGE_REL_BASED_ABSOLUTE:
808 break;
809 case IMAGE_REL_BASED_HIGH:
810 *(short*)(page+offset) += HIWORD(delta);
811 break;
812 case IMAGE_REL_BASED_LOW:
813 *(short*)(page+offset) += LOWORD(delta);
814 break;
815 case IMAGE_REL_BASED_HIGHLOW:
816 *(int*)(page+offset) += delta;
817 /* FIXME: if this is an exported address, fire up enhanced logic */
818 break;
819 default:
820 FIXME_(module)("Unknown/unsupported fixup type %d.\n", type);
821 break;
822 }
823 }
824 }
825 return 1;
826 }
827
828
829 /***********************************************************************
830 * map_image
831 *
832 * Map an executable (PE format) image into memory.
833 */
834 static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, SIZE_T total_size,
835 SIZE_T header_size, int shared_fd, BOOL removable, PVOID *addr_ptr )
836 {
837 IMAGE_DOS_HEADER *dos;
838 IMAGE_NT_HEADERS *nt;
839 IMAGE_SECTION_HEADER *sec;
840 IMAGE_DATA_DIRECTORY *imports;
841 NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
842 int i;
843 off_t pos;
844 struct file_view *view = NULL;
845 char *ptr;
846
847 /* zero-map the whole range */
848
849 RtlEnterCriticalSection( &csVirtual );
850
851 if (base >= (char *)0x110000) /* make sure the DOS area remains free */
852 status = map_view( &view, base, total_size,
853 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
854
855 if (status == STATUS_CONFLICTING_ADDRESSES)
856 status = map_view( &view, NULL, total_size,
857 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
858
859 if (status != STATUS_SUCCESS) goto error;
860
861 ptr = view->base;
862 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
863
864 /* map the header */
865
866 status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
867 if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ,
868 removable ) != STATUS_SUCCESS) goto error;
869 dos = (IMAGE_DOS_HEADER *)ptr;
870 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
871 if ((char *)(nt + 1) > ptr + header_size) goto error;
872
873 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
874 if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
875
876 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
877 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
878
879 /* check the architecture */
880
881 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
882 {
883 MESSAGE("Trying to load PE image for unsupported architecture (");
884 switch (nt->FileHeader.Machine)
885 {
886 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
887 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
888 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
889 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
890 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
891 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
892 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
893 case IMAGE_FILE_MACHINE_IA64: MESSAGE("IA-64"); break;
894 case IMAGE_FILE_MACHINE_ALPHA64: MESSAGE("Alpha-64"); break;
895 case IMAGE_FILE_MACHINE_AMD64: MESSAGE("AMD-64"); break;
896 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
897 }
898 MESSAGE(")\n");
899 goto error;
900 }
901
902 /* check for non page-aligned binary */
903
904 if (nt->OptionalHeader.SectionAlignment <= page_mask)
905 {
906 /* unaligned sections, this happens for native subsystem binaries */
907 /* in that case Windows simply maps in the whole file */
908
909 if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ,
910 removable ) != STATUS_SUCCESS) goto error;
911
912 /* check that all sections are loaded at the right offset */
913 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
914 {
915 if (sec[i].VirtualAddress != sec[i].PointerToRawData)
916 goto error; /* Windows refuses to load in that case too */
917 }
918
919 /* set the image protections */
920 VIRTUAL_SetProt( view, ptr, total_size,
921 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
922
923 /* perform relocations if necessary */
924 /* FIXME: not 100% compatible, Windows doesn't do this for non page-aligned binaries */
925 if (ptr != base)
926 {
927 const IMAGE_DATA_DIRECTORY *relocs;
928 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
929 if (relocs->VirtualAddress && relocs->Size)
930 do_relocations( ptr, relocs, ptr - base, total_size );
931 }
932
933 goto done;
934 }
935
936
937 /* map all the sections */
938
939 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
940 {
941 SIZE_T map_size, file_size, end;
942
943 if (!sec->Misc.VirtualSize)
944 {
945 file_size = sec->SizeOfRawData;
946 map_size = ROUND_SIZE( 0, file_size );
947 }
948 else
949 {
950 map_size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
951 file_size = min( sec->SizeOfRawData, map_size );
952 }
953
954 /* a few sanity checks */
955 end = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, map_size );
956 if (sec->VirtualAddress > total_size || end > total_size || end < sec->VirtualAddress)
957 {
958 ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
959 sec->Name, sec->VirtualAddress, map_size, total_size );
960 goto error;
961 }
962
963 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
964 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
965 {
966 TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
967 sec->Name, ptr + sec->VirtualAddress,
968 sec->PointerToRawData, (int)pos, file_size, map_size,
969 sec->Characteristics );
970 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, map_size, pos,
971 VPROT_COMMITTED | VPROT_READ | PROT_WRITE,
972 FALSE ) != STATUS_SUCCESS)
973 {
974 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
975 goto error;
976 }
977
978 /* check if the import directory falls inside this section */
979 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
980 imports->VirtualAddress < sec->VirtualAddress + map_size)
981 {
982 UINT_PTR base = imports->VirtualAddress & ~page_mask;
983 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
984 if (end > sec->VirtualAddress + map_size) end = sec->VirtualAddress + map_size;
985 if (end > base)
986 map_file_into_view( view, shared_fd, base, end - base,
987 pos + (base - sec->VirtualAddress),
988 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
989 FALSE );
990 }
991 pos += map_size;
992 continue;
993 }
994
995 TRACE_(module)( "mapping section %.8s at %p off %lx size %lx virt %lx flags %lx\n",
996 sec->Name, ptr + sec->VirtualAddress,
997 sec->PointerToRawData, sec->SizeOfRawData,
998 sec->Misc.VirtualSize, sec->Characteristics );
999
1000 if (!sec->PointerToRawData || !file_size) continue;
1001
1002 /* Note: if the section is not aligned properly map_file_into_view will magically
1003 * fall back to read(), so we don't need to check anything here.
1004 */
1005 if (map_file_into_view( view, fd, sec->VirtualAddress, file_size, sec->PointerToRawData,
1006 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1007 removable ) != STATUS_SUCCESS)
1008 {
1009 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
1010 goto error;
1011 }
1012
1013 if (file_size & page_mask)
1014 {
1015 end = ROUND_SIZE( 0, file_size );
1016 if (end > map_size) end = map_size;
1017 TRACE_(module)("clearing %p - %p\n",
1018 ptr + sec->VirtualAddress + file_size,
1019 ptr + sec->VirtualAddress + end );
1020 memset( ptr + sec->VirtualAddress + file_size, 0, end - file_size );
1021 }
1022 }
1023
1024
1025 /* perform base relocation, if necessary */
1026
1027 if (ptr != base)
1028 {
1029 const IMAGE_DATA_DIRECTORY *relocs;
1030
1031 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1032 if (!relocs->VirtualAddress || !relocs->Size)
1033 {
1034 if (nt->OptionalHeader.ImageBase == 0x400000) {
1035 ERR("Image was mapped at %p: standard load address for a Win32 program (0x00400000) not available\n", ptr);
1036 ERR("Do you have exec-shield or prelink active?\n");
1037 } else
1038 ERR( "FATAL: Need to relocate module from addr %lx, but there are no relocation records\n",
1039 nt->OptionalHeader.ImageBase );
1040 goto error;
1041 }
1042
1043 /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
1044 * really make sure that the *new* base address is also > 2GB.
1045 * Some DLLs really check the MSB of the module handle :-/
1046 */
1047 if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((ULONG_PTR)base & 0x80000000))
1048 ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
1049
1050 if (!do_relocations( ptr, relocs, ptr - base, total_size ))
1051 {
1052 goto error;
1053 }
1054 }
1055
1056 /* set the image protections */
1057
1058 sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
1059 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1060 {
1061 SIZE_T size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
1062 BYTE vprot = VPROT_COMMITTED;
1063 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
1064 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_READ|VPROT_WRITECOPY;
1065 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
1066 VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
1067 }
1068
1069 done:
1070 if (!removable) /* don't keep handle open on removable media */
1071 NtDuplicateObject( NtCurrentProcess(), hmapping,
1072 NtCurrentProcess(), &view->mapping,
1073 0, 0, DUPLICATE_SAME_ACCESS );
1074
1075 RtlLeaveCriticalSection( &csVirtual );
1076
1077 *addr_ptr = ptr;
1078 return STATUS_SUCCESS;
1079
1080 error:
1081 if (view) delete_view( view );
1082 RtlLeaveCriticalSection( &csVirtual );
1083 return status;
1084 }
1085
1086
1087 /***********************************************************************
1088 * is_current_process
1089 *
1090 * Check whether a process handle is for the current process.
1091 */
1092 BOOL is_current_process( HANDLE handle )
1093 {
1094 BOOL ret = FALSE;
1095
1096 if (handle == NtCurrentProcess()) return TRUE;
1097 SERVER_START_REQ( get_process_info )
1098 {
1099 req->handle = handle;
1100 if (!wine_server_call( req ))
1101 ret = ((DWORD)reply->pid == GetCurrentProcessId());
1102 }
1103 SERVER_END_REQ;
1104 return ret;
1105 }
1106
1107
1108 /***********************************************************************
1109 * virtual_init
1110 */
1111 static inline void virtual_init(void)
1112 {
1113 #ifndef page_mask
1114 page_size = getpagesize();
1115 page_mask = page_size - 1;
1116 /* Make sure we have a power of 2 */
1117 assert( !(page_size & page_mask) );
1118 page_shift = 0;
1119 while ((1 << page_shift) != page_size) page_shift++;
1120 #endif /* page_mask */
1121 }
1122
1123
1124 /***********************************************************************
1125 * VIRTUAL_alloc_teb
1126 *
1127 * Allocate a memory view for a new TEB, properly aligned to a multiple of the size.
1128 */
1129 NTSTATUS VIRTUAL_alloc_teb( void **ret, size_t size, BOOL first )
1130 {
1131 void *ptr;
1132 NTSTATUS status;
1133 struct file_view *view;
1134 size_t align_size;
1135 BYTE vprot = VPROT_READ | VPROT_WRITE | VPROT_COMMITTED;
1136
1137 if (first) virtual_init();
1138
1139 *ret = NULL;
1140 size = ROUND_SIZE( 0, size );
1141 align_size = page_size;
1142 while (align_size < size) align_size *= 2;
1143
1144 for (;;)
1145 {
1146 if ((ptr = wine_anon_mmap( NULL, 2 * align_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
1147 {
1148 if (errno == ENOMEM) return STATUS_NO_MEMORY;
1149 return STATUS_INVALID_PARAMETER;
1150 }
1151 if (!is_beyond_limit( ptr, 2 * align_size, user_space_limit ))
1152 {
1153 ptr = unmap_extra_space( ptr, 2 * align_size, align_size, align_size - 1 );
1154 break;
1155 }
1156 /* if we got something beyond the user limit, unmap it and retry */
1157 add_reserved_area( ptr, 2 * align_size );
1158 }
1159
1160 if (!first) RtlEnterCriticalSection( &csVirtual );
1161
1162 status = create_view( &view, ptr, size, vprot );
1163 if (status == STATUS_SUCCESS)
1164 {
1165 view->flags |= VFLAG_VALLOC;
1166 *ret = ptr;
1167 }
1168 else unmap_area( ptr, size );
1169
1170 if (!first) RtlLeaveCriticalSection( &csVirtual );
1171
1172 return status;
1173 }
1174
1175
1176 /***********************************************************************
1177 * VIRTUAL_HandleFault
1178 */
1179 NTSTATUS VIRTUAL_HandleFault( LPCVOID addr )
1180 {
1181 FILE_VIEW *view;
1182 NTSTATUS ret = STATUS_ACCESS_VIOLATION;
1183
1184 RtlEnterCriticalSection( &csVirtual );
1185 if ((view = VIRTUAL_FindView( addr )))
1186 {
1187 BYTE vprot = view->prot[((const char *)addr - (const char *)view->base) >> page_shift];
1188 void *page = (void *)((UINT_PTR)addr & ~page_mask);
1189 char *stack = NtCurrentTeb()->Tib.StackLimit;
1190 if (vprot & VPROT_GUARD)
1191 {
1192 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
1193 ret = STATUS_GUARD_PAGE_VIOLATION;
1194 }
1195 /* is it inside the stack guard page? */
1196 if (((const char *)addr >= stack) && ((const char *)addr < stack + (page_mask+1)))
1197 ret = STATUS_STACK_OVERFLOW;
1198 }
1199 RtlLeaveCriticalSection( &csVirtual );
1200 return ret;
1201 }
1202
1203 /***********************************************************************
1204 * VIRTUAL_HasMapping
1205 *
1206 * Check if the specified view has an associated file mapping.
1207 */
1208 BOOL VIRTUAL_HasMapping( LPCVOID addr )
1209 {
1210 FILE_VIEW *view;
1211 BOOL ret = FALSE;
1212
1213 RtlEnterCriticalSection( &csVirtual );
1214 if ((view = VIRTUAL_FindView( addr ))) ret = (view->mapping != 0);
1215 RtlLeaveCriticalSection( &csVirtual );
1216 return ret;
1217 }
1218
1219
1220 /***********************************************************************
1221 * VIRTUAL_UseLargeAddressSpace
1222 *
1223 * Increase the address space size for apps that support it.
1224 */
1225 void VIRTUAL_UseLargeAddressSpace(void)
1226 {
1227 if (user_space_limit >= ADDRESS_SPACE_LIMIT) return;
1228 RtlEnterCriticalSection( &csVirtual );
1229 remove_reserved_area( user_space_limit, (char *)ADDRESS_SPACE_LIMIT - (char *)user_space_limit );
1230 user_space_limit = ADDRESS_SPACE_LIMIT;
1231 RtlLeaveCriticalSection( &csVirtual );
1232 }
1233
1234
1235 /***********************************************************************
1236 * NtAllocateVirtualMemory (NTDLL.@)
1237 * ZwAllocateVirtualMemory (NTDLL.@)
1238 */
1239 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
1240 SIZE_T *size_ptr, ULONG type, ULONG protect )
1241 {
1242 void *base;
1243 BYTE vprot;
1244 SIZE_T size = *size_ptr;
1245 NTSTATUS status = STATUS_SUCCESS;
1246 struct file_view *view;
1247
1248 TRACE("%p %p %08lx %lx %08lx\n", process, *ret, size, type, protect );
1249
1250 if (!size) return STATUS_INVALID_PARAMETER;
1251
1252 if (!is_current_process( process ))
1253 {
1254 ERR("Unsupported on other process\n");
1255 return STATUS_ACCESS_DENIED;
1256 }
1257
1258 /* Round parameters to a page boundary */
1259
1260 if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
1261
1262 if (*ret)
1263 {
1264 if (type & MEM_RESERVE) /* Round down to 64k boundary */
1265 base = ROUND_ADDR( *ret, granularity_mask );
1266 else
1267 base = ROUND_ADDR( *ret, page_mask );
1268 size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1269
1270 /* disallow low 64k, wrap-around and kernel space */
1271 if (((char *)base <= (char *)granularity_mask) ||
1272 ((char *)base + size < (char *)base) ||
1273 is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
1274 return STATUS_INVALID_PARAMETER;
1275 }
1276 else
1277 {
1278 base = NULL;
1279 size = (size + page_mask) & ~page_mask;
1280 }
1281
1282 if (type & MEM_TOP_DOWN) {
1283 /* FIXME: MEM_TOP_DOWN allocates the largest possible address. */
1284 WARN("MEM_TOP_DOWN ignored\n");
1285 type &= ~MEM_TOP_DOWN;
1286 }
1287
1288 if (zero_bits)
1289 WARN("zero_bits %lu ignored\n", zero_bits);
1290
1291 /* Compute the alloc type flags */
1292
1293 if (!(type & MEM_SYSTEM))
1294 {
1295 if (!(type & (MEM_COMMIT | MEM_RESERVE)) || (type & ~(MEM_COMMIT | MEM_RESERVE)))
1296 {
1297 WARN("called with wrong alloc type flags (%08lx) !\n", type);
1298 return STATUS_INVALID_PARAMETER;
1299 }
1300 }
1301 vprot = VIRTUAL_GetProt( protect );
1302 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
1303
1304 /* Reserve the memory */
1305
1306 RtlEnterCriticalSection( &csVirtual );
1307
1308 if (type & MEM_SYSTEM)
1309 {
1310 if (type & MEM_IMAGE) vprot |= VPROT_IMAGE;
1311 status = create_view( &view, base, size, vprot | VPROT_COMMITTED );
1312 if (status == STATUS_SUCCESS)
1313 {
1314 view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
1315 base = view->base;
1316 }
1317 }
1318 else if ((type & MEM_RESERVE) || !base)
1319 {
1320 status = map_view( &view, base, size, vprot );
1321 if (status == STATUS_SUCCESS)
1322 {
1323 view->flags |= VFLAG_VALLOC;
1324 base = view->base;
1325 }
1326 }
1327 else /* commit the pages */
1328 {
1329 if (!(view = VIRTUAL_FindView( base )) ||
1330 ((char *)base + size > (char *)view->base + view->size)) status = STATUS_NOT_MAPPED_VIEW;
1331 else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1332 }
1333
1334 RtlLeaveCriticalSection( &csVirtual );
1335
1336 if (status == STATUS_SUCCESS)
1337 {
1338 *ret = base;
1339 *size_ptr = size;
1340 }
1341 return status;
1342 }
1343
1344
1345 /***********************************************************************
1346 * NtFreeVirtualMemory (NTDLL.@)
1347 * ZwFreeVirtualMemory (NTDLL.@)
1348 */
1349 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr, ULONG type )
1350 {
1351 FILE_VIEW *view;
1352 char *base;
1353 NTSTATUS status = STATUS_SUCCESS;
1354 LPVOID addr = *addr_ptr;
1355 SIZE_T size = *size_ptr;
1356
1357 TRACE("%p %p %08lx %lx\n", process, addr, size, type );
1358
1359 if (!is_current_process( process ))
1360 {
1361 ERR("Unsupported on other process\n");
1362 return STATUS_ACCESS_DENIED;
1363 }
1364
1365 /* Fix the parameters */
1366
1367 size = ROUND_SIZE( addr, size );
1368 base = ROUND_ADDR( addr, page_mask );
1369
1370 RtlEnterCriticalSection(&csVirtual);
1371
1372 if (!(view = VIRTUAL_FindView( base )) ||
1373 (base + size > (char *)view->base + view->size) ||
1374 !(view->flags & VFLAG_VALLOC))
1375 {
1376 status = STATUS_INVALID_PARAMETER;
1377 }
1378 else if (type & MEM_SYSTEM)
1379 {
1380 /* return the values that the caller should use to unmap the area */
1381 *addr_ptr = view->base;
1382 *size_ptr = view->size;
1383 view->flags |= VFLAG_SYSTEM;
1384 delete_view( view );
1385 }
1386 else if (type == MEM_RELEASE)
1387 {
1388 /* Free the pages */
1389
1390 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
1391 else
1392 {
1393 delete_view( view );
1394 *addr_ptr = base;
1395 *size_ptr = size;
1396 }
1397 }
1398 else if (type == MEM_DECOMMIT)
1399 {
1400 status = decommit_pages( view, base - (char *)view->base, size );
1401 if (status == STATUS_SUCCESS)
1402 {
1403 *addr_ptr = base;
1404 *size_ptr = size;
1405 }
1406 }
1407 else
1408 {
1409 WARN("called with wrong free type flags (%08lx) !\n", type);
1410 status = STATUS_INVALID_PARAMETER;
1411 }
1412
1413 RtlLeaveCriticalSection(&csVirtual);
1414 return status;
1415 }
1416
1417
1418 /***********************************************************************
1419 * NtProtectVirtualMemory (NTDLL.@)
1420 * ZwProtectVirtualMemory (NTDLL.@)
1421 */
1422 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr,
1423 ULONG new_prot, ULONG *old_prot )
1424 {
1425 FILE_VIEW *view;
1426 NTSTATUS status = STATUS_SUCCESS;
1427 char *base;
1428 UINT i;
1429 BYTE vprot, *p;
1430 ULONG prot;
1431 SIZE_T size = *size_ptr;
1432 LPVOID addr = *addr_ptr;
1433
1434 TRACE("%p %p %08lx %08lx\n", process, addr, size, new_prot );
1435
1436 if (!is_current_process( process ))
1437 {
1438 ERR("Unsupported on other process\n");
1439 return STATUS_ACCESS_DENIED;
1440 }
1441
1442 /* Fix the parameters */
1443
1444 size = ROUND_SIZE( addr, size );
1445 base = ROUND_ADDR( addr, page_mask );
1446
1447 RtlEnterCriticalSection( &csVirtual );
1448
1449 if (!(view = VIRTUAL_FindView( base )) || (base + size > (char *)view->base + view->size))
1450 {
1451 status = STATUS_INVALID_PARAMETER;
1452 }
1453 else
1454 {
1455 /* Make sure all the pages are committed */
1456
1457 p = view->prot + ((base - (char *)view->base) >> page_shift);
1458 VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1459 for (i = size >> page_shift; i; i--, p++)
1460 {
1461 if (!(*p & VPROT_COMMITTED))
1462 {
1463 status = STATUS_NOT_COMMITTED;
1464 break;
1465 }
1466 }
1467 if (!i)
1468 {
1469 if (old_prot) *old_prot = prot;
1470 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1471 if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1472 }
1473 }
1474 RtlLeaveCriticalSection( &csVirtual );
1475
1476 if (status == STATUS_SUCCESS)
1477 {
1478 *addr_ptr = base;
1479 *size_ptr = size;
1480 }
1481 return status;
1482 }
1483
1484 #define UNIMPLEMENTED_INFO_CLASS(c) \
1485 case c: \
1486 FIXME("(process=%p,addr=%p) Unimplemented information class: " #c "\n", process, addr); \
1487 return STATUS_INVALID_INFO_CLASS
1488
1489 /***********************************************************************
1490 * NtQueryVirtualMemory (NTDLL.@)
1491 * ZwQueryVirtualMemory (NTDLL.@)
1492 */
1493 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
1494 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
1495 SIZE_T len, SIZE_T *res_len )
1496 {
1497 FILE_VIEW *view;
1498 char *base, *alloc_base = 0;
1499 struct list *ptr;
1500 SIZE_T size = 0;
1501 MEMORY_BASIC_INFORMATION *info = buffer;
1502
1503 if (info_class != MemoryBasicInformation)
1504 {
1505 switch(info_class)
1506 {
1507 UNIMPLEMENTED_INFO_CLASS(MemoryWorkingSetList);
1508 UNIMPLEMENTED_INFO_CLASS(MemorySectionName);
1509 UNIMPLEMENTED_INFO_CLASS(MemoryBasicVlmInformation);
1510
1511 default:
1512 FIXME("(%p,%p,info_class=%d,%p,%ld,%p) Unknown information class\n",
1513 process, addr, info_class, buffer, len, res_len);
1514 return STATUS_INVALID_INFO_CLASS;
1515 }
1516 }
1517 if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
1518 return STATUS_WORKING_SET_LIMIT_RANGE;
1519
1520 if (!is_current_process( process ))
1521 {
1522 ERR("Unsupported on other process\n");
1523 return STATUS_ACCESS_DENIED;
1524 }
1525
1526 base = ROUND_ADDR( addr, page_mask );
1527
1528 /* Find the view containing the address */
1529
1530 RtlEnterCriticalSection(&csVirtual);
1531 ptr = list_head( &views_list );
1532 for (;;)
1533 {
1534 if (!ptr)
1535 {
1536 /* make the address space end at the user limit, except if
1537 * the last view was mapped beyond that */
1538 if (alloc_base <= (char *)user_space_limit)
1539 {
1540 if (user_space_limit && base >= (char *)user_space_limit)
1541 {
1542 RtlLeaveCriticalSection( &csVirtual );
1543 return STATUS_WORKING_SET_LIMIT_RANGE;
1544 }
1545 size = (char *)user_space_limit - alloc_base;
1546 }
1547 else size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1548 view = NULL;
1549 break;
1550 }
1551 view = LIST_ENTRY( ptr, struct file_view, entry );
1552 if ((char *)view->base > base)
1553 {
1554 size = (char *)view->base - alloc_base;
1555 view = NULL;
1556 break;
1557 }
1558 if ((char *)view->base + view->size > base)
1559 {
1560 alloc_base = view->base;
1561 size = view->size;
1562 break;
1563 }
1564 alloc_base = (char *)view->base + view->size;
1565 ptr = list_next( &views_list, ptr );
1566 }
1567
1568 /* Fill the info structure */
1569
1570 if (!view)
1571 {
1572 info->State = MEM_FREE;
1573 info->Protect = 0;
1574 info->AllocationProtect = 0;
1575 info->Type = 0;
1576 }
1577 else
1578 {
1579 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1580 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1581 for (size = base - alloc_base; size < view->size; size += page_mask+1)
1582 if (view->prot[size >> page_shift] != vprot) break;
1583 VIRTUAL_GetWin32Prot( view->protect, &info->AllocationProtect, NULL );
1584 if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
1585 else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
1586 else info->Type = MEM_MAPPED;
1587 }
1588 RtlLeaveCriticalSection(&csVirtual);
1589
1590 info->BaseAddress = (LPVOID)base;
1591 info->AllocationBase = (LPVOID)alloc_base;
1592 info->RegionSize = size - (base - alloc_base);
1593 if (res_len) *res_len = sizeof(*info);
1594 return STATUS_SUCCESS;
1595 }
1596
1597
1598 /***********************************************************************
1599 * NtLockVirtualMemory (NTDLL.@)
1600 * ZwLockVirtualMemory (NTDLL.@)
1601 */
1602 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1603 {
1604 if (!is_current_process( process ))
1605 {
1606 ERR("Unsupported on other process\n");
1607 return STATUS_ACCESS_DENIED;
1608 }
1609 return STATUS_SUCCESS;
1610 }
1611
1612
1613 /***********************************************************************
1614 * NtUnlockVirtualMemory (NTDLL.@)
1615 * ZwUnlockVirtualMemory (NTDLL.@)
1616 */
1617 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1618 {
1619 if (!is_current_process( process ))
1620 {
1621 ERR("Unsupported on other process\n");
1622 return STATUS_ACCESS_DENIED;
1623 }
1624 return STATUS_SUCCESS;
1625 }
1626
1627
1628 /***********************************************************************
1629 * NtCreateSection (NTDLL.@)
1630 * ZwCreateSection (NTDLL.@)
1631 */
1632 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
1633 const LARGE_INTEGER *size, ULONG protect,
1634 ULONG sec_flags, HANDLE file )
1635 {
1636 NTSTATUS ret;
1637 BYTE vprot;
1638 DWORD len = (attr && attr->ObjectName) ? attr->ObjectName->Length : 0;
1639
1640 /* Check parameters */
1641
1642 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1643
1644 vprot = VIRTUAL_GetProt( protect );
1645 if (sec_flags & SEC_RESERVE)
1646 {
1647 if (file) return STATUS_INVALID_PARAMETER;
1648 }
1649 else vprot |= VPROT_COMMITTED;
1650 if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1651 if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
1652
1653 /* Create the server object */
1654
1655 SERVER_START_REQ( create_mapping )
1656 {
1657 req->file_handle = file;
1658 req->size_high = size ? size->u.HighPart : 0;
1659 req->size_low = size ? size->u.LowPart : 0;
1660 req->protect = vprot;
1661 req->access = access;
1662 req->inherit = (attr && (attr->Attributes & OBJ_INHERIT) != 0);
1663 if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
1664 ret = wine_server_call( req );
1665 *handle = reply->handle;
1666 }
1667 SERVER_END_REQ;
1668 return ret;
1669 }
1670
1671
1672 /***********************************************************************
1673 * NtOpenSection (NTDLL.@)
1674 * ZwOpenSection (NTDLL.@)
1675 */
1676 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
1677 {
1678 NTSTATUS ret;
1679 DWORD len = attr->ObjectName->Length;
1680
1681 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1682
1683 SERVER_START_REQ( open_mapping )
1684 {
1685 req->access = access;
1686 req->inherit = (attr->Attributes & OBJ_INHERIT) != 0;
1687 wine_server_add_data( req, attr->ObjectName->Buffer, len );
1688 if (!(ret = wine_server_call( req ))) *handle = reply->handle;
1689 }
1690 SERVER_END_REQ;
1691 return ret;
1692 }
1693
1694
1695 /***********************************************************************
1696 * NtMapViewOfSection (NTDLL.@)
1697 * ZwMapViewOfSection (NTDLL.@)
1698 */
1699 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
1700 SIZE_T commit_size, const LARGE_INTEGER *offset_ptr, SIZE_T *size_ptr,
1701 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
1702 {
1703 FILE_FS_DEVICE_INFORMATION device_info;
1704 NTSTATUS res;
1705 SIZE_T size = 0;
1706 int unix_handle = -1;
1707 int prot;
1708 void *base;
1709 struct file_view *view;
1710 DWORD size_low, size_high, header_size, shared_size;
1711 HANDLE shared_file;
1712 BOOL removable = FALSE;
1713 LARGE_INTEGER offset;
1714
1715 offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
1716
1717 TRACE("handle=%p process=%p addr=%p off=%lx%08lx size=%lx access=%lx\n",
1718 handle, process, *addr_ptr, offset.u.HighPart, offset.u.LowPart, size, protect );
1719
1720 if (!is_current_process( process ))
1721 {
1722 ERR("Unsupported on other process\n");
1723 return STATUS_ACCESS_DENIED;
1724 }
1725
1726 /* Check parameters */
1727
1728 if ((offset.u.LowPart & granularity_mask) ||
1729 (*addr_ptr && ((UINT_PTR)*addr_ptr & granularity_mask)))
1730 return STATUS_INVALID_PARAMETER;
1731
1732 SERVER_START_REQ( get_mapping_info )
1733 {
1734 req->handle = handle;
1735 res = wine_server_call( req );
1736 prot = reply->protect;
1737 base = reply->base;
1738 size_low = reply->size_low;
1739 size_high = reply->size_high;
1740 header_size = reply->header_size;
1741 shared_file = reply->shared_file;
1742 shared_size = reply->shared_size;
1743 }
1744 SERVER_END_REQ;
1745 if (res) return res;
1746
1747 if ((res = wine_server_handle_to_fd( handle, 0, &unix_handle, NULL ))) return res;
1748
1749 if (FILE_GetDeviceInfo( unix_handle, &device_info ) == STATUS_SUCCESS)
1750 removable = device_info.Characteristics & FILE_REMOVABLE_MEDIA;
1751
1752 if (prot & VPROT_IMAGE)
1753 {
1754 if (shared_file)
1755 {
1756 int shared_fd;
1757
1758 if ((res = wine_server_handle_to_fd( shared_file, GENERIC_READ, &shared_fd,
1759 NULL ))) goto done;
1760 res = map_image( handle, unix_handle, base, size_low, header_size,
1761 shared_fd, removable, addr_ptr );
1762 wine_server_release_fd( shared_file, shared_fd );
1763 NtClose( shared_file );
1764 }
1765 else
1766 {
1767 res = map_image( handle, unix_handle, base, size_low, header_size,
1768 -1, removable, addr_ptr );
1769 }
1770 wine_server_release_fd( handle, unix_handle );
1771 if (!res) *size_ptr = size_low;
1772 return res;
1773 }
1774
1775 if (size_high)
1776 ERR("Sizes larger than 4Gb not supported\n");
1777
1778 if ((offset.u.LowPart >= size_low) ||
1779 (*size_ptr > size_low - offset.u.LowPart))
1780 {
1781 res = STATUS_INVALID_PARAMETER;
1782 goto done;
1783 }
1784 if (*size_ptr) size = ROUND_SIZE( offset.u.LowPart, *size_ptr );
1785 else size = size_low - offset.u.LowPart;
1786
1787 switch(protect)
1788 {
1789 case PAGE_NOACCESS:
1790 break;
1791 case PAGE_READWRITE:
1792 case PAGE_EXECUTE_READWRITE:
1793 if (!(prot & VPROT_WRITE))
1794 {
1795 res = STATUS_INVALID_PARAMETER;
1796 goto done;
1797 }
1798 removable = FALSE;
1799 /* fall through */
1800 case PAGE_READONLY:
1801 case PAGE_WRITECOPY:
1802 case PAGE_EXECUTE:
1803 case PAGE_EXECUTE_READ:
1804 case PAGE_EXECUTE_WRITECOPY:
1805 if (prot & VPROT_READ) break;
1806 /* fall through */
1807 default:
1808 res = STATUS_INVALID_PARAMETER;
1809 goto done;
1810 }
1811
1812 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1813 * which has a view of this mapping commits some pages, they will
1814 * appear commited in all other processes, which have the same
1815 * view created. Since we don`t support this yet, we create the
1816 * whole mapping commited.
1817 */
1818 prot |= VPROT_COMMITTED;
1819
1820 /* Reserve a properly aligned area */
1821
1822 RtlEnterCriticalSection( &csVirtual );
1823
1824 res = map_view( &view, *addr_ptr, size, prot );
1825 if (res)
1826 {
1827 RtlLeaveCriticalSection( &csVirtual );
1828 goto done;
1829 }
1830
1831 /* Map the file */
1832
1833 TRACE("handle=%p size=%lx offset=%lx%08lx\n",
1834 handle, size, offset.u.HighPart, offset.u.LowPart );
1835
1836 res = map_file_into_view( view, unix_handle, 0, size, offset.QuadPart, prot, removable );
1837 if (res == STATUS_SUCCESS)
1838 {
1839 if (!removable) /* don't keep handle open on removable media */
1840 NtDuplicateObject( NtCurrentProcess(), handle,
1841 NtCurrentProcess(), &view->mapping,
1842 0, 0, DUPLICATE_SAME_ACCESS );
1843
1844 *addr_ptr = view->base;
1845 *size_ptr = size;
1846 }
1847 else
1848 {
1849 ERR( "map_file_into_view %p %lx %lx%08lx failed\n",
1850 view->base, size, offset.u.HighPart, offset.u.LowPart );
1851 delete_view( view );
1852 }
1853
1854 RtlLeaveCriticalSection( &csVirtual );
1855
1856 done:
1857 wine_server_release_fd( handle, unix_handle );
1858 return res;
1859 }
1860
1861
1862 /***********************************************************************
1863 * NtUnmapViewOfSection (NTDLL.@)
1864 * ZwUnmapViewOfSection (NTDLL.@)
1865 */
1866 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
1867 {
1868 FILE_VIEW *view;
1869 NTSTATUS status = STATUS_INVALID_PARAMETER;
1870 void *base = ROUND_ADDR( addr, page_mask );
1871
1872 if (!is_current_process( process ))
1873 {
1874 ERR("Unsupported on other process\n");
1875 return STATUS_ACCESS_DENIED;
1876 }
1877 RtlEnterCriticalSection( &csVirtual );
1878 if ((view = VIRTUAL_FindView( base )) && (base == view->base))
1879 {
1880 delete_view( view );
1881 status = STATUS_SUCCESS;
1882 }
1883 RtlLeaveCriticalSection( &csVirtual );
1884 return status;
1885 }
1886
1887
1888 /***********************************************************************
1889 * NtFlushVirtualMemory (NTDLL.@)
1890 * ZwFlushVirtualMemory (NTDLL.@)
1891 */
1892 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
1893 SIZE_T *size_ptr, ULONG unknown )
1894 {
1895 FILE_VIEW *view;
1896 NTSTATUS status = STATUS_SUCCESS;
1897 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
1898
1899 if (!is_current_process( process ))
1900 {
1901 ERR("Unsupported on other process\n");
1902 return STATUS_ACCESS_DENIED;
1903 }
1904 RtlEnterCriticalSection( &csVirtual );
1905 if (!(view = VIRTUAL_FindView( addr ))) status = STATUS_INVALID_PARAMETER;
1906 else
1907 {
1908 if (!*size_ptr) *size_ptr = view->size;
1909 *addr_ptr = addr;
1910 if (msync( addr, *size_ptr, MS_SYNC )) status = STATUS_NOT_MAPPED_DATA;
1911 }
1912 RtlLeaveCriticalSection( &csVirtual );
1913 return status;
1914 }
1915
1916
1917 /***********************************************************************
1918 * NtReadVirtualMemory (NTDLL.@)
1919 * ZwReadVirtualMemory (NTDLL.@)
1920 */
1921 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
1922 SIZE_T size, SIZE_T *bytes_read )
1923 {
1924 NTSTATUS status;
1925
1926 SERVER_START_REQ( read_process_memory )
1927 {
1928 req->handle = process;
1929 req->addr = (void *)addr;
1930 wine_server_set_reply( req, buffer, size );
1931 if ((status = wine_server_call( req ))) size = 0;
1932 }
1933 SERVER_END_REQ;
1934 if (bytes_read) *bytes_read = size;
1935 return status;
1936 }
1937
1938
1939 /***********************************************************************
1940 * NtWriteVirtualMemory (NTDLL.@)
1941 * ZwWriteVirtualMemory (NTDLL.@)
1942 */
1943 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
1944 SIZE_T size, SIZE_T *bytes_written )
1945 {
1946 static const unsigned int zero;
1947 SIZE_T first_offset, last_offset, first_mask, last_mask;
1948 NTSTATUS status;
1949
1950 if (!size) return STATUS_INVALID_PARAMETER;
1951
1952 /* compute the mask for the first int */
1953 first_mask = ~0;
1954 first_offset = (ULONG_PTR)addr % sizeof(int);
1955 memset( &first_mask, 0, first_offset );
1956
1957 /* compute the mask for the last int */
1958 last_offset = (size + first_offset) % sizeof(int);
1959 last_mask = 0;
1960 memset( &last_mask, 0xff, last_offset ? last_offset : sizeof(int) );
1961
1962 SERVER_START_REQ( write_process_memory )
1963 {
1964 req->handle = process;
1965 req->addr = (char *)addr - first_offset;
1966 req->first_mask = first_mask;
1967 req->last_mask = last_mask;
1968 if (first_offset) wine_server_add_data( req, &zero, first_offset );
1969 wine_server_add_data( req, buffer, size );
1970 if (last_offset) wine_server_add_data( req, &zero, sizeof(int) - last_offset );
1971
1972 if ((status = wine_server_call( req ))) size = 0;
1973 }
1974 SERVER_END_REQ;
1975 if (bytes_written) *bytes_written = size;
1976 return status;
1977 }
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