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Added addrinfo structures.
[wine/multimedia.git] / dlls / ntdll / virtual.c
blobec12bc31ec911612b556807e9bee0ae3f70700f4
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 if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
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 DPRINTF( "View: %p - %p", addr, addr + view->size - 1 );
168 if (view->flags & VFLAG_SYSTEM)
169 DPRINTF( " (system)\n" );
170 else if (view->flags & VFLAG_VALLOC)
171 DPRINTF( " (valloc)\n" );
172 else if (view->mapping)
173 DPRINTF( " %p\n", view->mapping );
174 else
175 DPRINTF( " (anonymous)\n");
176
177 for (count = i = 1; i < view->size >> page_shift; i++, count++)
178 {
179 if (view->prot[i] == prot) continue;
180 DPRINTF( " %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 DPRINTF( " %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 DPRINTF( "\nDump of all virtual memory views:\n\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 page > base + total_size)
785 {
786 ERR_(module)("invalid relocation %p,%lx,%ld at %p,%lx,%lx\n",
787 rel, rel->VirtualAddress, rel->SizeOfBlock,
788 base, dir->VirtualAddress, dir->Size );
789 return 0;
790 }
791
792 TRACE_(module)("%ld relocations for page %lx\n", rel->SizeOfBlock, rel->VirtualAddress);
793
794 /* patching in reverse order */
795 for (i = 0 ; i < count; i++)
796 {
797 int offset = TypeOffset[i] & 0xFFF;
798 int type = TypeOffset[i] >> 12;
799 switch(type)
800 {
801 case IMAGE_REL_BASED_ABSOLUTE:
802 break;
803 case IMAGE_REL_BASED_HIGH:
804 *(short*)(page+offset) += HIWORD(delta);
805 break;
806 case IMAGE_REL_BASED_LOW:
807 *(short*)(page+offset) += LOWORD(delta);
808 break;
809 case IMAGE_REL_BASED_HIGHLOW:
810 *(int*)(page+offset) += delta;
811 /* FIXME: if this is an exported address, fire up enhanced logic */
812 break;
813 default:
814 FIXME_(module)("Unknown/unsupported fixup type %d.\n", type);
815 break;
816 }
817 }
818 }
819 return 1;
820 }
821
822
823 /***********************************************************************
824 * map_image
825 *
826 * Map an executable (PE format) image into memory.
827 */
828 static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, SIZE_T total_size,
829 SIZE_T header_size, int shared_fd, BOOL removable, PVOID *addr_ptr )
830 {
831 IMAGE_DOS_HEADER *dos;
832 IMAGE_NT_HEADERS *nt;
833 IMAGE_SECTION_HEADER *sec;
834 IMAGE_DATA_DIRECTORY *imports;
835 NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
836 int i;
837 off_t pos;
838 struct file_view *view = NULL;
839 char *ptr;
840
841 /* zero-map the whole range */
842
843 RtlEnterCriticalSection( &csVirtual );
844
845 if (base >= (char *)0x110000) /* make sure the DOS area remains free */
846 status = map_view( &view, base, total_size,
847 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
848
849 if (status == STATUS_CONFLICTING_ADDRESSES)
850 status = map_view( &view, NULL, total_size,
851 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
852
853 if (status != STATUS_SUCCESS) goto error;
854
855 ptr = view->base;
856 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
857
858 /* map the header */
859
860 status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
861 if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ,
862 removable ) != STATUS_SUCCESS) goto error;
863 dos = (IMAGE_DOS_HEADER *)ptr;
864 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
865 if ((char *)(nt + 1) > ptr + header_size) goto error;
866
867 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
868 if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
869
870 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
871 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
872
873 /* check the architecture */
874
875 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
876 {
877 MESSAGE("Trying to load PE image for unsupported architecture (");
878 switch (nt->FileHeader.Machine)
879 {
880 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
881 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
882 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
883 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
884 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
885 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
886 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
887 case IMAGE_FILE_MACHINE_IA64: MESSAGE("IA-64"); break;
888 case IMAGE_FILE_MACHINE_ALPHA64: MESSAGE("Alpha-64"); break;
889 case IMAGE_FILE_MACHINE_AMD64: MESSAGE("AMD-64"); break;
890 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
891 }
892 MESSAGE(")\n");
893 goto error;
894 }
895
896 /* check for non page-aligned binary */
897
898 if (nt->OptionalHeader.SectionAlignment <= page_mask)
899 {
900 /* unaligned sections, this happens for native subsystem binaries */
901 /* in that case Windows simply maps in the whole file */
902
903 if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ,
904 removable ) != STATUS_SUCCESS) goto error;
905
906 /* check that all sections are loaded at the right offset */
907 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
908 {
909 if (sec[i].VirtualAddress != sec[i].PointerToRawData)
910 goto error; /* Windows refuses to load in that case too */
911 }
912
913 /* set the image protections */
914 VIRTUAL_SetProt( view, ptr, total_size,
915 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
916
917 /* perform relocations if necessary */
918 /* FIXME: not 100% compatible, Windows doesn't do this for non page-aligned binaries */
919 if (ptr != base)
920 {
921 const IMAGE_DATA_DIRECTORY *relocs;
922 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
923 if (relocs->VirtualAddress && relocs->Size)
924 do_relocations( ptr, relocs, ptr - base, total_size );
925 }
926
927 goto done;
928 }
929
930
931 /* map all the sections */
932
933 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
934 {
935 SIZE_T map_size, file_size, end;
936
937 if (!sec->Misc.VirtualSize)
938 {
939 file_size = sec->SizeOfRawData;
940 map_size = ROUND_SIZE( 0, file_size );
941 }
942 else
943 {
944 map_size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
945 file_size = min( sec->SizeOfRawData, map_size );
946 }
947
948 /* a few sanity checks */
949 end = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, map_size );
950 if (sec->VirtualAddress > total_size || end > total_size || end < sec->VirtualAddress)
951 {
952 ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
953 sec->Name, sec->VirtualAddress, map_size, total_size );
954 goto error;
955 }
956
957 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
958 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
959 {
960 TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
961 sec->Name, ptr + sec->VirtualAddress,
962 sec->PointerToRawData, (int)pos, file_size, map_size,
963 sec->Characteristics );
964 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, map_size, pos,
965 VPROT_COMMITTED | VPROT_READ | PROT_WRITE,
966 FALSE ) != STATUS_SUCCESS)
967 {
968 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
969 goto error;
970 }
971
972 /* check if the import directory falls inside this section */
973 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
974 imports->VirtualAddress < sec->VirtualAddress + map_size)
975 {
976 UINT_PTR base = imports->VirtualAddress & ~page_mask;
977 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
978 if (end > sec->VirtualAddress + map_size) end = sec->VirtualAddress + map_size;
979 if (end > base)
980 map_file_into_view( view, shared_fd, base, end - base,
981 pos + (base - sec->VirtualAddress),
982 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
983 FALSE );
984 }
985 pos += map_size;
986 continue;
987 }
988
989 TRACE_(module)( "mapping section %.8s at %p off %lx size %lx virt %lx flags %lx\n",
990 sec->Name, ptr + sec->VirtualAddress,
991 sec->PointerToRawData, sec->SizeOfRawData,
992 sec->Misc.VirtualSize, sec->Characteristics );
993
994 if (!sec->PointerToRawData || !file_size) continue;
995
996 /* Note: if the section is not aligned properly map_file_into_view will magically
997 * fall back to read(), so we don't need to check anything here.
998 */
999 if (map_file_into_view( view, fd, sec->VirtualAddress, file_size, sec->PointerToRawData,
1000 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1001 removable ) != STATUS_SUCCESS)
1002 {
1003 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
1004 goto error;
1005 }
1006
1007 if (file_size & page_mask)
1008 {
1009 end = ROUND_SIZE( 0, file_size );
1010 if (end > map_size) end = map_size;
1011 TRACE_(module)("clearing %p - %p\n",
1012 ptr + sec->VirtualAddress + file_size,
1013 ptr + sec->VirtualAddress + end );
1014 memset( ptr + sec->VirtualAddress + file_size, 0, end - file_size );
1015 }
1016 }
1017
1018
1019 /* perform base relocation, if necessary */
1020
1021 if (ptr != base)
1022 {
1023 const IMAGE_DATA_DIRECTORY *relocs;
1024
1025 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1026 if (!relocs->VirtualAddress || !relocs->Size)
1027 {
1028 if (nt->OptionalHeader.ImageBase == 0x400000) {
1029 ERR("Image was mapped at %p: standard load address for a Win32 program (0x00400000) not available\n", ptr);
1030 ERR("Do you have exec-shield or prelink active?\n");
1031 } else
1032 ERR( "FATAL: Need to relocate module from addr %lx, but there are no relocation records\n",
1033 nt->OptionalHeader.ImageBase );
1034 goto error;
1035 }
1036
1037 /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
1038 * really make sure that the *new* base address is also > 2GB.
1039 * Some DLLs really check the MSB of the module handle :-/
1040 */
1041 if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((ULONG_PTR)base & 0x80000000))
1042 ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
1043
1044 if (!do_relocations( ptr, relocs, ptr - base, total_size ))
1045 {
1046 goto error;
1047 }
1048 }
1049
1050 /* set the image protections */
1051
1052 sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
1053 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1054 {
1055 SIZE_T size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
1056 BYTE vprot = VPROT_COMMITTED;
1057 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
1058 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_READ|VPROT_WRITECOPY;
1059 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
1060 VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
1061 }
1062
1063 done:
1064 if (!removable) /* don't keep handle open on removable media */
1065 NtDuplicateObject( NtCurrentProcess(), hmapping,
1066 NtCurrentProcess(), &view->mapping,
1067 0, 0, DUPLICATE_SAME_ACCESS );
1068
1069 RtlLeaveCriticalSection( &csVirtual );
1070
1071 *addr_ptr = ptr;
1072 return STATUS_SUCCESS;
1073
1074 error:
1075 if (view) delete_view( view );
1076 RtlLeaveCriticalSection( &csVirtual );
1077 return status;
1078 }
1079
1080
1081 /***********************************************************************
1082 * is_current_process
1083 *
1084 * Check whether a process handle is for the current process.
1085 */
1086 BOOL is_current_process( HANDLE handle )
1087 {
1088 BOOL ret = FALSE;
1089
1090 if (handle == NtCurrentProcess()) return TRUE;
1091 SERVER_START_REQ( get_process_info )
1092 {
1093 req->handle = handle;
1094 if (!wine_server_call( req ))
1095 ret = ((DWORD)reply->pid == GetCurrentProcessId());
1096 }
1097 SERVER_END_REQ;
1098 return ret;
1099 }
1100
1101
1102 /***********************************************************************
1103 * virtual_init
1104 */
1105 static inline void virtual_init(void)
1106 {
1107 #ifndef page_mask
1108 page_size = getpagesize();
1109 page_mask = page_size - 1;
1110 /* Make sure we have a power of 2 */
1111 assert( !(page_size & page_mask) );
1112 page_shift = 0;
1113 while ((1 << page_shift) != page_size) page_shift++;
1114 #endif /* page_mask */
1115 }
1116
1117
1118 /***********************************************************************
1119 * VIRTUAL_alloc_teb
1120 *
1121 * Allocate a memory view for a new TEB, properly aligned to a multiple of the size.
1122 */
1123 NTSTATUS VIRTUAL_alloc_teb( void **ret, size_t size, BOOL first )
1124 {
1125 void *ptr;
1126 NTSTATUS status;
1127 struct file_view *view;
1128 size_t align_size;
1129 BYTE vprot = VPROT_READ | VPROT_WRITE | VPROT_COMMITTED;
1130
1131 if (first) virtual_init();
1132
1133 *ret = NULL;
1134 size = ROUND_SIZE( 0, size );
1135 align_size = page_size;
1136 while (align_size < size) align_size *= 2;
1137
1138 for (;;)
1139 {
1140 if ((ptr = wine_anon_mmap( NULL, 2 * align_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
1141 {
1142 if (errno == ENOMEM) return STATUS_NO_MEMORY;
1143 return STATUS_INVALID_PARAMETER;
1144 }
1145 if (!is_beyond_limit( ptr, 2 * align_size, user_space_limit ))
1146 {
1147 ptr = unmap_extra_space( ptr, 2 * align_size, align_size, align_size - 1 );
1148 break;
1149 }
1150 /* if we got something beyond the user limit, unmap it and retry */
1151 add_reserved_area( ptr, 2 * align_size );
1152 }
1153
1154 if (!first) RtlEnterCriticalSection( &csVirtual );
1155
1156 status = create_view( &view, ptr, size, vprot );
1157 if (status == STATUS_SUCCESS)
1158 {
1159 view->flags |= VFLAG_VALLOC;
1160 *ret = ptr;
1161 }
1162 else unmap_area( ptr, size );
1163
1164 if (!first) RtlLeaveCriticalSection( &csVirtual );
1165
1166 return status;
1167 }
1168
1169
1170 /***********************************************************************
1171 * VIRTUAL_HandleFault
1172 */
1173 NTSTATUS VIRTUAL_HandleFault( LPCVOID addr )
1174 {
1175 FILE_VIEW *view;
1176 NTSTATUS ret = STATUS_ACCESS_VIOLATION;
1177
1178 RtlEnterCriticalSection( &csVirtual );
1179 if ((view = VIRTUAL_FindView( addr )))
1180 {
1181 BYTE vprot = view->prot[((const char *)addr - (const char *)view->base) >> page_shift];
1182 void *page = (void *)((UINT_PTR)addr & ~page_mask);
1183 char *stack = NtCurrentTeb()->Tib.StackLimit;
1184 if (vprot & VPROT_GUARD)
1185 {
1186 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
1187 ret = STATUS_GUARD_PAGE_VIOLATION;
1188 }
1189 /* is it inside the stack guard page? */
1190 if (((const char *)addr >= stack) && ((const char *)addr < stack + (page_mask+1)))
1191 ret = STATUS_STACK_OVERFLOW;
1192 }
1193 RtlLeaveCriticalSection( &csVirtual );
1194 return ret;
1195 }
1196
1197 /***********************************************************************
1198 * VIRTUAL_HasMapping
1199 *
1200 * Check if the specified view has an associated file mapping.
1201 */
1202 BOOL VIRTUAL_HasMapping( LPCVOID addr )
1203 {
1204 FILE_VIEW *view;
1205 BOOL ret = FALSE;
1206
1207 RtlEnterCriticalSection( &csVirtual );
1208 if ((view = VIRTUAL_FindView( addr ))) ret = (view->mapping != 0);
1209 RtlLeaveCriticalSection( &csVirtual );
1210 return ret;
1211 }
1212
1213
1214 /***********************************************************************
1215 * VIRTUAL_UseLargeAddressSpace
1216 *
1217 * Increase the address space size for apps that support it.
1218 */
1219 void VIRTUAL_UseLargeAddressSpace(void)
1220 {
1221 if (user_space_limit >= ADDRESS_SPACE_LIMIT) return;
1222 RtlEnterCriticalSection( &csVirtual );
1223 remove_reserved_area( user_space_limit, (char *)ADDRESS_SPACE_LIMIT - (char *)user_space_limit );
1224 user_space_limit = ADDRESS_SPACE_LIMIT;
1225 RtlLeaveCriticalSection( &csVirtual );
1226 }
1227
1228
1229 /***********************************************************************
1230 * NtAllocateVirtualMemory (NTDLL.@)
1231 * ZwAllocateVirtualMemory (NTDLL.@)
1232 */
1233 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
1234 SIZE_T *size_ptr, ULONG type, ULONG protect )
1235 {
1236 void *base;
1237 BYTE vprot;
1238 SIZE_T size = *size_ptr;
1239 NTSTATUS status = STATUS_SUCCESS;
1240 struct file_view *view;
1241
1242 TRACE("%p %p %08lx %lx %08lx\n", process, *ret, size, type, protect );
1243
1244 if (!size) return STATUS_INVALID_PARAMETER;
1245
1246 if (!is_current_process( process ))
1247 {
1248 ERR("Unsupported on other process\n");
1249 return STATUS_ACCESS_DENIED;
1250 }
1251
1252 /* Round parameters to a page boundary */
1253
1254 if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
1255
1256 if (*ret)
1257 {
1258 if (type & MEM_RESERVE) /* Round down to 64k boundary */
1259 base = ROUND_ADDR( *ret, granularity_mask );
1260 else
1261 base = ROUND_ADDR( *ret, page_mask );
1262 size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1263
1264 /* disallow low 64k, wrap-around and kernel space */
1265 if (((char *)base <= (char *)granularity_mask) ||
1266 ((char *)base + size < (char *)base) ||
1267 is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
1268 return STATUS_INVALID_PARAMETER;
1269 }
1270 else
1271 {
1272 base = NULL;
1273 size = (size + page_mask) & ~page_mask;
1274 }
1275
1276 if (type & MEM_TOP_DOWN) {
1277 /* FIXME: MEM_TOP_DOWN allocates the largest possible address. */
1278 WARN("MEM_TOP_DOWN ignored\n");
1279 type &= ~MEM_TOP_DOWN;
1280 }
1281
1282 if (zero_bits)
1283 WARN("zero_bits %lu ignored\n", zero_bits);
1284
1285 /* Compute the alloc type flags */
1286
1287 if (!(type & MEM_SYSTEM))
1288 {
1289 if (!(type & (MEM_COMMIT | MEM_RESERVE)) || (type & ~(MEM_COMMIT | MEM_RESERVE)))
1290 {
1291 WARN("called with wrong alloc type flags (%08lx) !\n", type);
1292 return STATUS_INVALID_PARAMETER;
1293 }
1294 }
1295 vprot = VIRTUAL_GetProt( protect );
1296 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
1297
1298 /* Reserve the memory */
1299
1300 RtlEnterCriticalSection( &csVirtual );
1301
1302 if (type & MEM_SYSTEM)
1303 {
1304 if (type & MEM_IMAGE) vprot |= VPROT_IMAGE;
1305 status = create_view( &view, base, size, vprot | VPROT_COMMITTED );
1306 if (status == STATUS_SUCCESS)
1307 {
1308 view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
1309 base = view->base;
1310 }
1311 }
1312 else if ((type & MEM_RESERVE) || !base)
1313 {
1314 status = map_view( &view, base, size, vprot );
1315 if (status == STATUS_SUCCESS)
1316 {
1317 view->flags |= VFLAG_VALLOC;
1318 base = view->base;
1319 }
1320 }
1321 else /* commit the pages */
1322 {
1323 if (!(view = VIRTUAL_FindView( base )) ||
1324 ((char *)base + size > (char *)view->base + view->size)) status = STATUS_NOT_MAPPED_VIEW;
1325 else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1326 }
1327
1328 RtlLeaveCriticalSection( &csVirtual );
1329
1330 if (status == STATUS_SUCCESS)
1331 {
1332 *ret = base;
1333 *size_ptr = size;
1334 }
1335 return status;
1336 }
1337
1338
1339 /***********************************************************************
1340 * NtFreeVirtualMemory (NTDLL.@)
1341 * ZwFreeVirtualMemory (NTDLL.@)
1342 */
1343 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr, ULONG type )
1344 {
1345 FILE_VIEW *view;
1346 char *base;
1347 NTSTATUS status = STATUS_SUCCESS;
1348 LPVOID addr = *addr_ptr;
1349 SIZE_T size = *size_ptr;
1350
1351 TRACE("%p %p %08lx %lx\n", process, addr, size, type );
1352
1353 if (!is_current_process( process ))
1354 {
1355 ERR("Unsupported on other process\n");
1356 return STATUS_ACCESS_DENIED;
1357 }
1358
1359 /* Fix the parameters */
1360
1361 size = ROUND_SIZE( addr, size );
1362 base = ROUND_ADDR( addr, page_mask );
1363
1364 RtlEnterCriticalSection(&csVirtual);
1365
1366 if (!(view = VIRTUAL_FindView( base )) ||
1367 (base + size > (char *)view->base + view->size) ||
1368 !(view->flags & VFLAG_VALLOC))
1369 {
1370 status = STATUS_INVALID_PARAMETER;
1371 }
1372 else if (type & MEM_SYSTEM)
1373 {
1374 /* return the values that the caller should use to unmap the area */
1375 *addr_ptr = view->base;
1376 *size_ptr = view->size;
1377 view->flags |= VFLAG_SYSTEM;
1378 delete_view( view );
1379 }
1380 else if (type == MEM_RELEASE)
1381 {
1382 /* Free the pages */
1383
1384 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
1385 else
1386 {
1387 delete_view( view );
1388 *addr_ptr = base;
1389 *size_ptr = size;
1390 }
1391 }
1392 else if (type == MEM_DECOMMIT)
1393 {
1394 status = decommit_pages( view, base - (char *)view->base, size );
1395 if (status == STATUS_SUCCESS)
1396 {
1397 *addr_ptr = base;
1398 *size_ptr = size;
1399 }
1400 }
1401 else
1402 {
1403 WARN("called with wrong free type flags (%08lx) !\n", type);
1404 status = STATUS_INVALID_PARAMETER;
1405 }
1406
1407 RtlLeaveCriticalSection(&csVirtual);
1408 return status;
1409 }
1410
1411
1412 /***********************************************************************
1413 * NtProtectVirtualMemory (NTDLL.@)
1414 * ZwProtectVirtualMemory (NTDLL.@)
1415 */
1416 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr,
1417 ULONG new_prot, ULONG *old_prot )
1418 {
1419 FILE_VIEW *view;
1420 NTSTATUS status = STATUS_SUCCESS;
1421 char *base;
1422 UINT i;
1423 BYTE vprot, *p;
1424 ULONG prot;
1425 SIZE_T size = *size_ptr;
1426 LPVOID addr = *addr_ptr;
1427
1428 TRACE("%p %p %08lx %08lx\n", process, addr, size, new_prot );
1429
1430 if (!is_current_process( process ))
1431 {
1432 ERR("Unsupported on other process\n");
1433 return STATUS_ACCESS_DENIED;
1434 }
1435
1436 /* Fix the parameters */
1437
1438 size = ROUND_SIZE( addr, size );
1439 base = ROUND_ADDR( addr, page_mask );
1440
1441 RtlEnterCriticalSection( &csVirtual );
1442
1443 if (!(view = VIRTUAL_FindView( base )) || (base + size > (char *)view->base + view->size))
1444 {
1445 status = STATUS_INVALID_PARAMETER;
1446 }
1447 else
1448 {
1449 /* Make sure all the pages are committed */
1450
1451 p = view->prot + ((base - (char *)view->base) >> page_shift);
1452 VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1453 for (i = size >> page_shift; i; i--, p++)
1454 {
1455 if (!(*p & VPROT_COMMITTED))
1456 {
1457 status = STATUS_NOT_COMMITTED;
1458 break;
1459 }
1460 }
1461 if (!i)
1462 {
1463 if (old_prot) *old_prot = prot;
1464 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1465 if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1466 }
1467 }
1468 RtlLeaveCriticalSection( &csVirtual );
1469
1470 if (status == STATUS_SUCCESS)
1471 {
1472 *addr_ptr = base;
1473 *size_ptr = size;
1474 }
1475 return status;
1476 }
1477
1478 #define UNIMPLEMENTED_INFO_CLASS(c) \
1479 case c: \
1480 FIXME("(process=%p,addr=%p) Unimplemented information class: " #c "\n", process, addr); \
1481 return STATUS_INVALID_INFO_CLASS
1482
1483 /***********************************************************************
1484 * NtQueryVirtualMemory (NTDLL.@)
1485 * ZwQueryVirtualMemory (NTDLL.@)
1486 */
1487 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
1488 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
1489 SIZE_T len, SIZE_T *res_len )
1490 {
1491 FILE_VIEW *view;
1492 char *base, *alloc_base = 0;
1493 struct list *ptr;
1494 SIZE_T size = 0;
1495 MEMORY_BASIC_INFORMATION *info = buffer;
1496
1497 if (info_class != MemoryBasicInformation)
1498 {
1499 switch(info_class)
1500 {
1501 UNIMPLEMENTED_INFO_CLASS(MemoryWorkingSetList);
1502 UNIMPLEMENTED_INFO_CLASS(MemorySectionName);
1503 UNIMPLEMENTED_INFO_CLASS(MemoryBasicVlmInformation);
1504
1505 default:
1506 FIXME("(%p,%p,info_class=%d,%p,%ld,%p) Unknown information class\n",
1507 process, addr, info_class, buffer, len, res_len);
1508 return STATUS_INVALID_INFO_CLASS;
1509 }
1510 }
1511 if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
1512 return STATUS_WORKING_SET_LIMIT_RANGE;
1513
1514 if (!is_current_process( process ))
1515 {
1516 ERR("Unsupported on other process\n");
1517 return STATUS_ACCESS_DENIED;
1518 }
1519
1520 base = ROUND_ADDR( addr, page_mask );
1521
1522 /* Find the view containing the address */
1523
1524 RtlEnterCriticalSection(&csVirtual);
1525 ptr = list_head( &views_list );
1526 for (;;)
1527 {
1528 if (!ptr)
1529 {
1530 /* make the address space end at the user limit, except if
1531 * the last view was mapped beyond that */
1532 if (alloc_base <= (char *)user_space_limit)
1533 {
1534 if (user_space_limit && base >= (char *)user_space_limit)
1535 {
1536 RtlLeaveCriticalSection( &csVirtual );
1537 return STATUS_WORKING_SET_LIMIT_RANGE;
1538 }
1539 size = (char *)user_space_limit - alloc_base;
1540 }
1541 else size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1542 view = NULL;
1543 break;
1544 }
1545 view = LIST_ENTRY( ptr, struct file_view, entry );
1546 if ((char *)view->base > base)
1547 {
1548 size = (char *)view->base - alloc_base;
1549 view = NULL;
1550 break;
1551 }
1552 if ((char *)view->base + view->size > base)
1553 {
1554 alloc_base = view->base;
1555 size = view->size;
1556 break;
1557 }
1558 alloc_base = (char *)view->base + view->size;
1559 ptr = list_next( &views_list, ptr );
1560 }
1561
1562 /* Fill the info structure */
1563
1564 if (!view)
1565 {
1566 info->State = MEM_FREE;
1567 info->Protect = 0;
1568 info->AllocationProtect = 0;
1569 info->Type = 0;
1570 }
1571 else
1572 {
1573 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1574 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1575 for (size = base - alloc_base; size < view->size; size += page_mask+1)
1576 if (view->prot[size >> page_shift] != vprot) break;
1577 VIRTUAL_GetWin32Prot( view->protect, &info->AllocationProtect, NULL );
1578 if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
1579 else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
1580 else info->Type = MEM_MAPPED;
1581 }
1582 RtlLeaveCriticalSection(&csVirtual);
1583
1584 info->BaseAddress = (LPVOID)base;
1585 info->AllocationBase = (LPVOID)alloc_base;
1586 info->RegionSize = size - (base - alloc_base);
1587 if (res_len) *res_len = sizeof(*info);
1588 return STATUS_SUCCESS;
1589 }
1590
1591
1592 /***********************************************************************
1593 * NtLockVirtualMemory (NTDLL.@)
1594 * ZwLockVirtualMemory (NTDLL.@)
1595 */
1596 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1597 {
1598 if (!is_current_process( process ))
1599 {
1600 ERR("Unsupported on other process\n");
1601 return STATUS_ACCESS_DENIED;
1602 }
1603 return STATUS_SUCCESS;
1604 }
1605
1606
1607 /***********************************************************************
1608 * NtUnlockVirtualMemory (NTDLL.@)
1609 * ZwUnlockVirtualMemory (NTDLL.@)
1610 */
1611 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1612 {
1613 if (!is_current_process( process ))
1614 {
1615 ERR("Unsupported on other process\n");
1616 return STATUS_ACCESS_DENIED;
1617 }
1618 return STATUS_SUCCESS;
1619 }
1620
1621
1622 /***********************************************************************
1623 * NtCreateSection (NTDLL.@)
1624 * ZwCreateSection (NTDLL.@)
1625 */
1626 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
1627 const LARGE_INTEGER *size, ULONG protect,
1628 ULONG sec_flags, HANDLE file )
1629 {
1630 NTSTATUS ret;
1631 BYTE vprot;
1632 DWORD len = (attr && attr->ObjectName) ? attr->ObjectName->Length : 0;
1633
1634 /* Check parameters */
1635
1636 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1637
1638 vprot = VIRTUAL_GetProt( protect );
1639 if (sec_flags & SEC_RESERVE)
1640 {
1641 if (file) return STATUS_INVALID_PARAMETER;
1642 }
1643 else vprot |= VPROT_COMMITTED;
1644 if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1645 if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
1646
1647 /* Create the server object */
1648
1649 SERVER_START_REQ( create_mapping )
1650 {
1651 req->file_handle = file;
1652 req->size_high = size ? size->u.HighPart : 0;
1653 req->size_low = size ? size->u.LowPart : 0;
1654 req->protect = vprot;
1655 req->access = access;
1656 req->inherit = (attr && (attr->Attributes & OBJ_INHERIT) != 0);
1657 if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
1658 ret = wine_server_call( req );
1659 *handle = reply->handle;
1660 }
1661 SERVER_END_REQ;
1662 return ret;
1663 }
1664
1665
1666 /***********************************************************************
1667 * NtOpenSection (NTDLL.@)
1668 * ZwOpenSection (NTDLL.@)
1669 */
1670 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
1671 {
1672 NTSTATUS ret;
1673 DWORD len = attr->ObjectName->Length;
1674
1675 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1676
1677 SERVER_START_REQ( open_mapping )
1678 {
1679 req->access = access;
1680 req->inherit = (attr->Attributes & OBJ_INHERIT) != 0;
1681 wine_server_add_data( req, attr->ObjectName->Buffer, len );
1682 if (!(ret = wine_server_call( req ))) *handle = reply->handle;
1683 }
1684 SERVER_END_REQ;
1685 return ret;
1686 }
1687
1688
1689 /***********************************************************************
1690 * NtMapViewOfSection (NTDLL.@)
1691 * ZwMapViewOfSection (NTDLL.@)
1692 */
1693 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
1694 SIZE_T commit_size, const LARGE_INTEGER *offset_ptr, SIZE_T *size_ptr,
1695 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
1696 {
1697 FILE_FS_DEVICE_INFORMATION device_info;
1698 NTSTATUS res;
1699 SIZE_T size = 0;
1700 int unix_handle = -1;
1701 int prot;
1702 void *base;
1703 struct file_view *view;
1704 DWORD size_low, size_high, header_size, shared_size;
1705 HANDLE shared_file;
1706 BOOL removable = FALSE;
1707 LARGE_INTEGER offset;
1708
1709 offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
1710
1711 TRACE("handle=%p process=%p addr=%p off=%lx%08lx size=%lx access=%lx\n",
1712 handle, process, *addr_ptr, offset.u.HighPart, offset.u.LowPart, size, protect );
1713
1714 if (!is_current_process( process ))
1715 {
1716 ERR("Unsupported on other process\n");
1717 return STATUS_ACCESS_DENIED;
1718 }
1719
1720 /* Check parameters */
1721
1722 if ((offset.u.LowPart & granularity_mask) ||
1723 (*addr_ptr && ((UINT_PTR)*addr_ptr & granularity_mask)))
1724 return STATUS_INVALID_PARAMETER;
1725
1726 SERVER_START_REQ( get_mapping_info )
1727 {
1728 req->handle = handle;
1729 res = wine_server_call( req );
1730 prot = reply->protect;
1731 base = reply->base;
1732 size_low = reply->size_low;
1733 size_high = reply->size_high;
1734 header_size = reply->header_size;
1735 shared_file = reply->shared_file;
1736 shared_size = reply->shared_size;
1737 }
1738 SERVER_END_REQ;
1739 if (res) return res;
1740
1741 if ((res = wine_server_handle_to_fd( handle, 0, &unix_handle, NULL ))) return res;
1742
1743 if (FILE_GetDeviceInfo( unix_handle, &device_info ) == STATUS_SUCCESS)
1744 removable = device_info.Characteristics & FILE_REMOVABLE_MEDIA;
1745
1746 if (prot & VPROT_IMAGE)
1747 {
1748 if (shared_file)
1749 {
1750 int shared_fd;
1751
1752 if ((res = wine_server_handle_to_fd( shared_file, GENERIC_READ, &shared_fd,
1753 NULL ))) goto done;
1754 res = map_image( handle, unix_handle, base, size_low, header_size,
1755 shared_fd, removable, addr_ptr );
1756 wine_server_release_fd( shared_file, shared_fd );
1757 NtClose( shared_file );
1758 }
1759 else
1760 {
1761 res = map_image( handle, unix_handle, base, size_low, header_size,
1762 -1, removable, addr_ptr );
1763 }
1764 wine_server_release_fd( handle, unix_handle );
1765 if (!res) *size_ptr = size_low;
1766 return res;
1767 }
1768
1769 if (size_high)
1770 ERR("Sizes larger than 4Gb not supported\n");
1771
1772 if ((offset.u.LowPart >= size_low) ||
1773 (*size_ptr > size_low - offset.u.LowPart))
1774 {
1775 res = STATUS_INVALID_PARAMETER;
1776 goto done;
1777 }
1778 if (*size_ptr) size = ROUND_SIZE( offset.u.LowPart, *size_ptr );
1779 else size = size_low - offset.u.LowPart;
1780
1781 switch(protect)
1782 {
1783 case PAGE_NOACCESS:
1784 break;
1785 case PAGE_READWRITE:
1786 case PAGE_EXECUTE_READWRITE:
1787 if (!(prot & VPROT_WRITE))
1788 {
1789 res = STATUS_INVALID_PARAMETER;
1790 goto done;
1791 }
1792 removable = FALSE;
1793 /* fall through */
1794 case PAGE_READONLY:
1795 case PAGE_WRITECOPY:
1796 case PAGE_EXECUTE:
1797 case PAGE_EXECUTE_READ:
1798 case PAGE_EXECUTE_WRITECOPY:
1799 if (prot & VPROT_READ) break;
1800 /* fall through */
1801 default:
1802 res = STATUS_INVALID_PARAMETER;
1803 goto done;
1804 }
1805
1806 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1807 * which has a view of this mapping commits some pages, they will
1808 * appear commited in all other processes, which have the same
1809 * view created. Since we don`t support this yet, we create the
1810 * whole mapping commited.
1811 */
1812 prot |= VPROT_COMMITTED;
1813
1814 /* Reserve a properly aligned area */
1815
1816 RtlEnterCriticalSection( &csVirtual );
1817
1818 res = map_view( &view, *addr_ptr, size, prot );
1819 if (res)
1820 {
1821 RtlLeaveCriticalSection( &csVirtual );
1822 goto done;
1823 }
1824
1825 /* Map the file */
1826
1827 TRACE("handle=%p size=%lx offset=%lx%08lx\n",
1828 handle, size, offset.u.HighPart, offset.u.LowPart );
1829
1830 res = map_file_into_view( view, unix_handle, 0, size, offset.QuadPart, prot, removable );
1831 if (res == STATUS_SUCCESS)
1832 {
1833 if (!removable) /* don't keep handle open on removable media */
1834 NtDuplicateObject( NtCurrentProcess(), handle,
1835 NtCurrentProcess(), &view->mapping,
1836 0, 0, DUPLICATE_SAME_ACCESS );
1837
1838 *addr_ptr = view->base;
1839 *size_ptr = size;
1840 }
1841 else
1842 {
1843 ERR( "map_file_into_view %p %lx %lx%08lx failed\n",
1844 view->base, size, offset.u.HighPart, offset.u.LowPart );
1845 delete_view( view );
1846 }
1847
1848 RtlLeaveCriticalSection( &csVirtual );
1849
1850 done:
1851 wine_server_release_fd( handle, unix_handle );
1852 return res;
1853 }
1854
1855
1856 /***********************************************************************
1857 * NtUnmapViewOfSection (NTDLL.@)
1858 * ZwUnmapViewOfSection (NTDLL.@)
1859 */
1860 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
1861 {
1862 FILE_VIEW *view;
1863 NTSTATUS status = STATUS_INVALID_PARAMETER;
1864 void *base = ROUND_ADDR( addr, page_mask );
1865
1866 if (!is_current_process( process ))
1867 {
1868 ERR("Unsupported on other process\n");
1869 return STATUS_ACCESS_DENIED;
1870 }
1871 RtlEnterCriticalSection( &csVirtual );
1872 if ((view = VIRTUAL_FindView( base )) && (base == view->base))
1873 {
1874 delete_view( view );
1875 status = STATUS_SUCCESS;
1876 }
1877 RtlLeaveCriticalSection( &csVirtual );
1878 return status;
1879 }
1880
1881
1882 /***********************************************************************
1883 * NtFlushVirtualMemory (NTDLL.@)
1884 * ZwFlushVirtualMemory (NTDLL.@)
1885 */
1886 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
1887 SIZE_T *size_ptr, ULONG unknown )
1888 {
1889 FILE_VIEW *view;
1890 NTSTATUS status = STATUS_SUCCESS;
1891 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
1892
1893 if (!is_current_process( process ))
1894 {
1895 ERR("Unsupported on other process\n");
1896 return STATUS_ACCESS_DENIED;
1897 }
1898 RtlEnterCriticalSection( &csVirtual );
1899 if (!(view = VIRTUAL_FindView( addr ))) status = STATUS_INVALID_PARAMETER;
1900 else
1901 {
1902 if (!*size_ptr) *size_ptr = view->size;
1903 *addr_ptr = addr;
1904 if (msync( addr, *size_ptr, MS_SYNC )) status = STATUS_NOT_MAPPED_DATA;
1905 }
1906 RtlLeaveCriticalSection( &csVirtual );
1907 return status;
1908 }
1909
1910
1911 /***********************************************************************
1912 * NtReadVirtualMemory (NTDLL.@)
1913 * ZwReadVirtualMemory (NTDLL.@)
1914 */
1915 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
1916 SIZE_T size, SIZE_T *bytes_read )
1917 {
1918 NTSTATUS status;
1919
1920 SERVER_START_REQ( read_process_memory )
1921 {
1922 req->handle = process;
1923 req->addr = (void *)addr;
1924 wine_server_set_reply( req, buffer, size );
1925 if ((status = wine_server_call( req ))) size = 0;
1926 }
1927 SERVER_END_REQ;
1928 if (bytes_read) *bytes_read = size;
1929 return status;
1930 }
1931
1932
1933 /***********************************************************************
1934 * NtWriteVirtualMemory (NTDLL.@)
1935 * ZwWriteVirtualMemory (NTDLL.@)
1936 */
1937 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
1938 SIZE_T size, SIZE_T *bytes_written )
1939 {
1940 static const unsigned int zero;
1941 SIZE_T first_offset, last_offset, first_mask, last_mask;
1942 NTSTATUS status;
1943
1944 if (!size) return STATUS_INVALID_PARAMETER;
1945
1946 /* compute the mask for the first int */
1947 first_mask = ~0;
1948 first_offset = (ULONG_PTR)addr % sizeof(int);
1949 memset( &first_mask, 0, first_offset );
1950
1951 /* compute the mask for the last int */
1952 last_offset = (size + first_offset) % sizeof(int);
1953 last_mask = 0;
1954 memset( &last_mask, 0xff, last_offset ? last_offset : sizeof(int) );
1955
1956 SERVER_START_REQ( write_process_memory )
1957 {
1958 req->handle = process;
1959 req->addr = (char *)addr - first_offset;
1960 req->first_mask = first_mask;
1961 req->last_mask = last_mask;
1962 if (first_offset) wine_server_add_data( req, &zero, first_offset );
1963 wine_server_add_data( req, buffer, size );
1964 if (last_offset) wine_server_add_data( req, &zero, sizeof(int) - last_offset );
1965
1966 if ((status = wine_server_call( req ))) size = 0;
1967 }
1968 SERVER_END_REQ;
1969 if (bytes_written) *bytes_written = size;
1970 return status;
1971 }
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