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ntdll: Check file size when mapping image sections to avoid SIGBUS errors.
[wine/multimedia.git] / dlls / ntdll / virtual.c
blob912f5c463dae72cca2965f9c786b9833f52f07e9
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 #include <sys/stat.h>
39 #ifdef HAVE_SYS_MMAN_H
40 #include <sys/mman.h>
41 #endif
42
43 #define NONAMELESSUNION
44 #define NONAMELESSSTRUCT
45 #include "ntstatus.h"
46 #define WIN32_NO_STATUS
47 #include "windef.h"
48 #include "winternl.h"
49 #include "winioctl.h"
50 #include "wine/library.h"
51 #include "wine/server.h"
52 #include "wine/list.h"
53 #include "wine/debug.h"
54 #include "ntdll_misc.h"
55
56 WINE_DEFAULT_DEBUG_CHANNEL(virtual);
57 WINE_DECLARE_DEBUG_CHANNEL(module);
58
59 #ifndef MS_SYNC
60 #define MS_SYNC 0
61 #endif
62
63 #ifndef MAP_NORESERVE
64 #define MAP_NORESERVE 0
65 #endif
66
67 /* File view */
68 typedef struct file_view
69 {
70 struct list entry; /* Entry in global view list */
71 void *base; /* Base address */
72 size_t size; /* Size in bytes */
73 HANDLE mapping; /* Handle to the file mapping */
74 BYTE flags; /* Allocation flags (VFLAG_*) */
75 BYTE protect; /* Protection for all pages at allocation time */
76 BYTE prot[1]; /* Protection byte for each page */
77 } FILE_VIEW;
78
79 /* Per-view flags */
80 #define VFLAG_SYSTEM 0x01 /* system view (underlying mmap not under our control) */
81 #define VFLAG_VALLOC 0x02 /* allocated by VirtualAlloc */
82
83 /* Conversion from VPROT_* to Win32 flags */
84 static const BYTE VIRTUAL_Win32Flags[16] =
85 {
86 PAGE_NOACCESS, /* 0 */
87 PAGE_READONLY, /* READ */
88 PAGE_READWRITE, /* WRITE */
89 PAGE_READWRITE, /* READ | WRITE */
90 PAGE_EXECUTE, /* EXEC */
91 PAGE_EXECUTE_READ, /* READ | EXEC */
92 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
93 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
94 PAGE_WRITECOPY, /* WRITECOPY */
95 PAGE_WRITECOPY, /* READ | WRITECOPY */
96 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
97 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
98 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
99 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
100 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
101 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
102 };
103
104 static struct list views_list = LIST_INIT(views_list);
105
106 static RTL_CRITICAL_SECTION csVirtual;
107 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
108 {
109 0, 0, &csVirtual,
110 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
111 0, 0, { (DWORD_PTR)(__FILE__ ": csVirtual") }
112 };
113 static RTL_CRITICAL_SECTION csVirtual = { &critsect_debug, -1, 0, 0, 0, 0 };
114
115 #ifdef __i386__
116 /* These are always the same on an i386, and it will be faster this way */
117 # define page_mask 0xfff
118 # define page_shift 12
119 # define page_size 0x1000
120 /* Note: these are Windows limits, you cannot change them. */
121 # define ADDRESS_SPACE_LIMIT ((void *)0xc0000000) /* top of the total available address space */
122 # define USER_SPACE_LIMIT ((void *)0x7fff0000) /* top of the user address space */
123 #else
124 static UINT page_shift;
125 static UINT page_size;
126 static UINT_PTR page_mask;
127 # define ADDRESS_SPACE_LIMIT 0 /* no limit needed on other platforms */
128 # define USER_SPACE_LIMIT 0 /* no limit needed on other platforms */
129 #endif /* __i386__ */
130 static const UINT_PTR granularity_mask = 0xffff; /* Allocation granularity (usually 64k) */
131
132 #define ROUND_ADDR(addr,mask) \
133 ((void *)((UINT_PTR)(addr) & ~(UINT_PTR)(mask)))
134
135 #define ROUND_SIZE(addr,size) \
136 (((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
137
138 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
139 do { if (TRACE_ON(virtual)) VIRTUAL_DumpView(view); } while (0)
140
141 static void *user_space_limit = USER_SPACE_LIMIT;
142
143
144 /***********************************************************************
145 * VIRTUAL_GetProtStr
146 */
147 static const char *VIRTUAL_GetProtStr( BYTE prot )
148 {
149 static char buffer[6];
150 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
151 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
152 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
153 buffer[3] = (prot & VPROT_WRITECOPY) ? 'W' : ((prot & VPROT_WRITE) ? 'w' : '-');
154 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
155 buffer[5] = 0;
156 return buffer;
157 }
158
159
160 /***********************************************************************
161 * VIRTUAL_DumpView
162 */
163 static void VIRTUAL_DumpView( FILE_VIEW *view )
164 {
165 UINT i, count;
166 char *addr = view->base;
167 BYTE prot = view->prot[0];
168
169 TRACE( "View: %p - %p", addr, addr + view->size - 1 );
170 if (view->flags & VFLAG_SYSTEM)
171 TRACE( " (system)\n" );
172 else if (view->flags & VFLAG_VALLOC)
173 TRACE( " (valloc)\n" );
174 else if (view->mapping)
175 TRACE( " %p\n", view->mapping );
176 else
177 TRACE( " (anonymous)\n");
178
179 for (count = i = 1; i < view->size >> page_shift; i++, count++)
180 {
181 if (view->prot[i] == prot) continue;
182 TRACE( " %p - %p %s\n",
183 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
184 addr += (count << page_shift);
185 prot = view->prot[i];
186 count = 0;
187 }
188 if (count)
189 TRACE( " %p - %p %s\n",
190 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
191 }
192
193
194 /***********************************************************************
195 * VIRTUAL_Dump
196 */
197 void VIRTUAL_Dump(void)
198 {
199 struct file_view *view;
200
201 TRACE( "Dump of all virtual memory views:\n" );
202 RtlEnterCriticalSection(&csVirtual);
203 LIST_FOR_EACH_ENTRY( view, &views_list, FILE_VIEW, entry )
204 {
205 VIRTUAL_DumpView( view );
206 }
207 RtlLeaveCriticalSection(&csVirtual);
208 }
209
210
211 /***********************************************************************
212 * VIRTUAL_FindView
213 *
214 * Find the view containing a given address. The csVirtual section must be held by caller.
215 *
216 * PARAMS
217 * addr [I] Address
218 *
219 * RETURNS
220 * View: Success
221 * NULL: Failure
222 */
223 static struct file_view *VIRTUAL_FindView( const void *addr )
224 {
225 struct file_view *view;
226
227 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
228 {
229 if (view->base > addr) break;
230 if ((const char*)view->base + view->size > (const char*)addr) return view;
231 }
232 return NULL;
233 }
234
235
236 /***********************************************************************
237 * find_view_range
238 *
239 * Find the first view overlapping at least part of the specified range.
240 * The csVirtual section must be held by caller.
241 */
242 static struct file_view *find_view_range( const void *addr, size_t size )
243 {
244 struct file_view *view;
245
246 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
247 {
248 if ((const char *)view->base >= (const char *)addr + size) break;
249 if ((const char *)view->base + view->size > (const char *)addr) return view;
250 }
251 return NULL;
252 }
253
254
255 /***********************************************************************
256 * add_reserved_area
257 *
258 * Add a reserved area to the list maintained by libwine.
259 * The csVirtual section must be held by caller.
260 */
261 static void add_reserved_area( void *addr, size_t size )
262 {
263 TRACE( "adding %p-%p\n", addr, (char *)addr + size );
264
265 if (addr < user_space_limit)
266 {
267 /* unmap the part of the area that is below the limit */
268 assert( (char *)addr + size > (char *)user_space_limit );
269 munmap( addr, (char *)user_space_limit - (char *)addr );
270 size -= (char *)user_space_limit - (char *)addr;
271 addr = user_space_limit;
272 }
273 /* blow away existing mappings */
274 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
275 wine_mmap_add_reserved_area( addr, size );
276 }
277
278
279 /***********************************************************************
280 * remove_reserved_area
281 *
282 * Remove a reserved area from the list maintained by libwine.
283 * The csVirtual section must be held by caller.
284 */
285 static void remove_reserved_area( void *addr, size_t size )
286 {
287 struct file_view *view;
288
289 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
290 {
291 if ((char *)view->base >= (char *)addr + size) break;
292 if ((char *)view->base + view->size <= (char *)addr) continue;
293 /* now we have an overlapping view */
294 if (view->base > addr)
295 {
296 wine_mmap_remove_reserved_area( addr, (char *)view->base - (char *)addr, TRUE );
297 size -= (char *)view->base - (char *)addr;
298 addr = view->base;
299 }
300 if ((char *)view->base + view->size >= (char *)addr + size)
301 {
302 /* view covers all the remaining area */
303 wine_mmap_remove_reserved_area( addr, size, FALSE );
304 size = 0;
305 break;
306 }
307 else /* view covers only part of the area */
308 {
309 wine_mmap_remove_reserved_area( addr, (char *)view->base + view->size - (char *)addr, FALSE );
310 size -= (char *)view->base + view->size - (char *)addr;
311 addr = (char *)view->base + view->size;
312 }
313 }
314 /* remove remaining space */
315 if (size) wine_mmap_remove_reserved_area( addr, size, TRUE );
316 }
317
318
319 /***********************************************************************
320 * is_beyond_limit
321 *
322 * Check if an address range goes beyond a given limit.
323 */
324 static inline int is_beyond_limit( void *addr, size_t size, void *limit )
325 {
326 return (limit && (addr >= limit || (char *)addr + size > (char *)limit));
327 }
328
329
330 /***********************************************************************
331 * unmap_area
332 *
333 * Unmap an area, or simply replace it by an empty mapping if it is
334 * in a reserved area. The csVirtual section must be held by caller.
335 */
336 static inline void unmap_area( void *addr, size_t size )
337 {
338 if (wine_mmap_is_in_reserved_area( addr, size ))
339 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
340 else if (is_beyond_limit( addr, size, user_space_limit ))
341 add_reserved_area( addr, size );
342 else
343 munmap( addr, size );
344 }
345
346
347 /***********************************************************************
348 * delete_view
349 *
350 * Deletes a view. The csVirtual section must be held by caller.
351 */
352 static void delete_view( struct file_view *view ) /* [in] View */
353 {
354 if (!(view->flags & VFLAG_SYSTEM)) unmap_area( view->base, view->size );
355 list_remove( &view->entry );
356 if (view->mapping) NtClose( view->mapping );
357 free( view );
358 }
359
360
361 /***********************************************************************
362 * create_view
363 *
364 * Create a view. The csVirtual section must be held by caller.
365 */
366 static NTSTATUS create_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
367 {
368 struct file_view *view;
369 struct list *ptr;
370
371 assert( !((UINT_PTR)base & page_mask) );
372 assert( !(size & page_mask) );
373
374 /* Create the view structure */
375
376 if (!(view = malloc( sizeof(*view) + (size >> page_shift) - 1 ))) return STATUS_NO_MEMORY;
377
378 view->base = base;
379 view->size = size;
380 view->flags = 0;
381 view->mapping = 0;
382 view->protect = vprot;
383 memset( view->prot, vprot & ~VPROT_IMAGE, size >> page_shift );
384
385 /* Insert it in the linked list */
386
387 LIST_FOR_EACH( ptr, &views_list )
388 {
389 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
390 if (next->base > base) break;
391 }
392 list_add_before( ptr, &view->entry );
393
394 /* Check for overlapping views. This can happen if the previous view
395 * was a system view that got unmapped behind our back. In that case
396 * we recover by simply deleting it. */
397
398 if ((ptr = list_prev( &views_list, &view->entry )) != NULL)
399 {
400 struct file_view *prev = LIST_ENTRY( ptr, struct file_view, entry );
401 if ((char *)prev->base + prev->size > (char *)base)
402 {
403 TRACE( "overlapping prev view %p-%p for %p-%p\n",
404 prev->base, (char *)prev->base + prev->size,
405 base, (char *)base + view->size );
406 assert( prev->flags & VFLAG_SYSTEM );
407 delete_view( prev );
408 }
409 }
410 if ((ptr = list_next( &views_list, &view->entry )) != NULL)
411 {
412 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
413 if ((char *)base + view->size > (char *)next->base)
414 {
415 TRACE( "overlapping next view %p-%p for %p-%p\n",
416 next->base, (char *)next->base + next->size,
417 base, (char *)base + view->size );
418 assert( next->flags & VFLAG_SYSTEM );
419 delete_view( next );
420 }
421 }
422
423 *view_ret = view;
424 VIRTUAL_DEBUG_DUMP_VIEW( view );
425 return STATUS_SUCCESS;
426 }
427
428
429 /***********************************************************************
430 * VIRTUAL_GetUnixProt
431 *
432 * Convert page protections to protection for mmap/mprotect.
433 */
434 static int VIRTUAL_GetUnixProt( BYTE vprot )
435 {
436 int prot = 0;
437 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
438 {
439 if (vprot & VPROT_READ) prot |= PROT_READ;
440 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
441 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
442 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
443 }
444 return prot;
445 }
446
447
448 /***********************************************************************
449 * VIRTUAL_GetWin32Prot
450 *
451 * Convert page protections to Win32 flags.
452 */
453 static DWORD VIRTUAL_GetWin32Prot( BYTE vprot )
454 {
455 DWORD ret = VIRTUAL_Win32Flags[vprot & 0x0f];
456 if (vprot & VPROT_NOCACHE) ret |= PAGE_NOCACHE;
457 if (vprot & VPROT_GUARD) ret |= PAGE_GUARD;
458 return ret;
459 }
460
461
462 /***********************************************************************
463 * VIRTUAL_GetProt
464 *
465 * Build page protections from Win32 flags.
466 *
467 * PARAMS
468 * protect [I] Win32 protection flags
469 *
470 * RETURNS
471 * Value of page protection flags
472 */
473 static BYTE VIRTUAL_GetProt( DWORD protect )
474 {
475 BYTE vprot;
476
477 switch(protect & 0xff)
478 {
479 case PAGE_READONLY:
480 vprot = VPROT_READ;
481 break;
482 case PAGE_READWRITE:
483 vprot = VPROT_READ | VPROT_WRITE;
484 break;
485 case PAGE_WRITECOPY:
486 /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
487 * that the hFile must have been opened with GENERIC_READ and
488 * GENERIC_WRITE access. This is WRONG as tests show that you
489 * only need GENERIC_READ access (at least for Win9x,
490 * FIXME: what about NT?). Thus, we don't put VPROT_WRITE in
491 * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
492 */
493 vprot = VPROT_READ | VPROT_WRITECOPY;
494 break;
495 case PAGE_EXECUTE:
496 vprot = VPROT_EXEC;
497 break;
498 case PAGE_EXECUTE_READ:
499 vprot = VPROT_EXEC | VPROT_READ;
500 break;
501 case PAGE_EXECUTE_READWRITE:
502 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
503 break;
504 case PAGE_EXECUTE_WRITECOPY:
505 /* See comment for PAGE_WRITECOPY above */
506 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
507 break;
508 case PAGE_NOACCESS:
509 default:
510 vprot = 0;
511 break;
512 }
513 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
514 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
515 return vprot;
516 }
517
518
519 /***********************************************************************
520 * VIRTUAL_SetProt
521 *
522 * Change the protection of a range of pages.
523 *
524 * RETURNS
525 * TRUE: Success
526 * FALSE: Failure
527 */
528 static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
529 void *base, /* [in] Starting address */
530 size_t size, /* [in] Size in bytes */
531 BYTE vprot ) /* [in] Protections to use */
532 {
533 TRACE("%p-%p %s\n",
534 base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
535
536 if (mprotect( base, size, VIRTUAL_GetUnixProt(vprot) ))
537 return FALSE; /* FIXME: last error */
538
539 memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
540 vprot, size >> page_shift );
541 VIRTUAL_DEBUG_DUMP_VIEW( view );
542 return TRUE;
543 }
544
545
546 /***********************************************************************
547 * unmap_extra_space
548 *
549 * Release the extra memory while keeping the range starting on the granularity boundary.
550 */
551 static inline void *unmap_extra_space( void *ptr, size_t total_size, size_t wanted_size, size_t mask )
552 {
553 if ((ULONG_PTR)ptr & mask)
554 {
555 size_t extra = mask + 1 - ((ULONG_PTR)ptr & mask);
556 munmap( ptr, extra );
557 ptr = (char *)ptr + extra;
558 total_size -= extra;
559 }
560 if (total_size > wanted_size)
561 munmap( (char *)ptr + wanted_size, total_size - wanted_size );
562 return ptr;
563 }
564
565
566 /***********************************************************************
567 * map_view
568 *
569 * Create a view and mmap the corresponding memory area.
570 * The csVirtual section must be held by caller.
571 */
572 static NTSTATUS map_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
573 {
574 void *ptr;
575 NTSTATUS status;
576
577 if (base)
578 {
579 if (is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
580 return STATUS_WORKING_SET_LIMIT_RANGE;
581
582 switch (wine_mmap_is_in_reserved_area( base, size ))
583 {
584 case -1: /* partially in a reserved area */
585 return STATUS_CONFLICTING_ADDRESSES;
586
587 case 0: /* not in a reserved area, do a normal allocation */
588 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
589 {
590 if (errno == ENOMEM) return STATUS_NO_MEMORY;
591 return STATUS_INVALID_PARAMETER;
592 }
593 if (ptr != base)
594 {
595 /* We couldn't get the address we wanted */
596 if (is_beyond_limit( ptr, size, user_space_limit )) add_reserved_area( ptr, size );
597 else munmap( ptr, size );
598 return STATUS_CONFLICTING_ADDRESSES;
599 }
600 break;
601
602 default:
603 case 1: /* in a reserved area, make sure the address is available */
604 if (find_view_range( base, size )) return STATUS_CONFLICTING_ADDRESSES;
605 /* replace the reserved area by our mapping */
606 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED )) != base)
607 return STATUS_INVALID_PARAMETER;
608 break;
609 }
610 }
611 else
612 {
613 size_t view_size = size + granularity_mask + 1;
614
615 for (;;)
616 {
617 if ((ptr = wine_anon_mmap( NULL, view_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
618 {
619 if (errno == ENOMEM) return STATUS_NO_MEMORY;
620 return STATUS_INVALID_PARAMETER;
621 }
622 /* if we got something beyond the user limit, unmap it and retry */
623 if (is_beyond_limit( ptr, view_size, user_space_limit )) add_reserved_area( ptr, view_size );
624 else break;
625 }
626 ptr = unmap_extra_space( ptr, view_size, size, granularity_mask );
627 }
628
629 status = create_view( view_ret, ptr, size, vprot );
630 if (status != STATUS_SUCCESS) unmap_area( ptr, size );
631 return status;
632 }
633
634
635 /***********************************************************************
636 * unaligned_mmap
637 *
638 * Linux kernels before 2.4.x can support non page-aligned offsets, as
639 * long as the offset is aligned to the filesystem block size. This is
640 * a big performance gain so we want to take advantage of it.
641 *
642 * However, when we use 64-bit file support this doesn't work because
643 * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
644 * in that it rounds unaligned offsets down to a page boundary. For
645 * these reasons we do a direct system call here.
646 */
647 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
648 unsigned int flags, int fd, off_t offset )
649 {
650 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
651 if (!(offset >> 32) && (offset & page_mask))
652 {
653 int ret;
654
655 struct
656 {
657 void *addr;
658 unsigned int length;
659 unsigned int prot;
660 unsigned int flags;
661 unsigned int fd;
662 unsigned int offset;
663 } args;
664
665 args.addr = addr;
666 args.length = length;
667 args.prot = prot;
668 args.flags = flags;
669 args.fd = fd;
670 args.offset = offset;
671
672 __asm__ __volatile__("push %%ebx\n\t"
673 "movl %2,%%ebx\n\t"
674 "int $0x80\n\t"
675 "popl %%ebx"
676 : "=a" (ret)
677 : "0" (90), /* SYS_mmap */
678 "q" (&args)
679 : "memory" );
680 if (ret < 0 && ret > -4096)
681 {
682 errno = -ret;
683 ret = -1;
684 }
685 return (void *)ret;
686 }
687 #endif
688 return mmap( addr, length, prot, flags, fd, offset );
689 }
690
691
692 /***********************************************************************
693 * map_file_into_view
694 *
695 * Wrapper for mmap() to map a file into a view, falling back to read if mmap fails.
696 * The csVirtual section must be held by caller.
697 */
698 static NTSTATUS map_file_into_view( struct file_view *view, int fd, size_t start, size_t size,
699 off_t offset, BYTE vprot, BOOL removable )
700 {
701 void *ptr;
702 int prot = VIRTUAL_GetUnixProt( vprot );
703 BOOL shared_write = (vprot & VPROT_WRITE) != 0;
704
705 assert( start < view->size );
706 assert( start + size <= view->size );
707
708 /* only try mmap if media is not removable (or if we require write access) */
709 if (!removable || shared_write)
710 {
711 int flags = MAP_FIXED | (shared_write ? MAP_SHARED : MAP_PRIVATE);
712
713 if (unaligned_mmap( (char *)view->base + start, size, prot, flags, fd, offset ) != (void *)-1)
714 goto done;
715
716 /* mmap() failed; if this is because the file offset is not */
717 /* page-aligned (EINVAL), or because the underlying filesystem */
718 /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
719 if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return FILE_GetNtStatus();
720 if (shared_write) return FILE_GetNtStatus(); /* we cannot fake shared write mappings */
721 }
722
723 /* Reserve the memory with an anonymous mmap */
724 ptr = wine_anon_mmap( (char *)view->base + start, size, PROT_READ | PROT_WRITE, MAP_FIXED );
725 if (ptr == (void *)-1) return FILE_GetNtStatus();
726 /* Now read in the file */
727 pread( fd, ptr, size, offset );
728 if (prot != (PROT_READ|PROT_WRITE)) mprotect( ptr, size, prot ); /* Set the right protection */
729 done:
730 memset( view->prot + (start >> page_shift), vprot, size >> page_shift );
731 return STATUS_SUCCESS;
732 }
733
734
735 /***********************************************************************
736 * decommit_view
737 *
738 * Decommit some pages of a given view.
739 * The csVirtual section must be held by caller.
740 */
741 static NTSTATUS decommit_pages( struct file_view *view, size_t start, size_t size )
742 {
743 if (wine_anon_mmap( (char *)view->base + start, size, PROT_NONE, MAP_FIXED ) != (void *)-1)
744 {
745 BYTE *p = view->prot + (start >> page_shift);
746 size >>= page_shift;
747 while (size--) *p++ &= ~VPROT_COMMITTED;
748 return STATUS_SUCCESS;
749 }
750 return FILE_GetNtStatus();
751 }
752
753
754 /***********************************************************************
755 * do_relocations
756 *
757 * Apply the relocations to a mapped PE image
758 */
759 static int do_relocations( char *base, const IMAGE_DATA_DIRECTORY *dir,
760 int delta, SIZE_T total_size )
761 {
762 IMAGE_BASE_RELOCATION *rel;
763
764 TRACE_(module)( "relocating from %p-%p to %p-%p\n",
765 base - delta, base - delta + total_size, base, base + total_size );
766
767 for (rel = (IMAGE_BASE_RELOCATION *)(base + dir->VirtualAddress);
768 ((char *)rel < base + dir->VirtualAddress + dir->Size) && rel->SizeOfBlock;
769 rel = (IMAGE_BASE_RELOCATION*)((char*)rel + rel->SizeOfBlock) )
770 {
771 char *page = base + rel->VirtualAddress;
772 WORD *TypeOffset = (WORD *)(rel + 1);
773 int i, count = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(*TypeOffset);
774
775 if (!count) continue;
776
777 /* sanity checks */
778 if ((char *)rel + rel->SizeOfBlock > base + dir->VirtualAddress + dir->Size)
779 {
780 ERR_(module)("invalid relocation %p,%lx,%ld at %p,%lx,%lx\n",
781 rel, rel->VirtualAddress, rel->SizeOfBlock,
782 base, dir->VirtualAddress, dir->Size );
783 return 0;
784 }
785
786 if (page > base + total_size)
787 {
788 WARN_(module)("skipping %d relocations for page %p beyond module %p-%p\n",
789 count, page, base, base + total_size );
790 continue;
791 }
792
793 TRACE_(module)("%d relocations for page %lx\n", count, rel->VirtualAddress);
794
795 /* patching in reverse order */
796 for (i = 0 ; i < count; i++)
797 {
798 int offset = TypeOffset[i] & 0xFFF;
799 int type = TypeOffset[i] >> 12;
800 switch(type)
801 {
802 case IMAGE_REL_BASED_ABSOLUTE:
803 break;
804 case IMAGE_REL_BASED_HIGH:
805 *(short*)(page+offset) += HIWORD(delta);
806 break;
807 case IMAGE_REL_BASED_LOW:
808 *(short*)(page+offset) += LOWORD(delta);
809 break;
810 case IMAGE_REL_BASED_HIGHLOW:
811 *(int*)(page+offset) += delta;
812 /* FIXME: if this is an exported address, fire up enhanced logic */
813 break;
814 default:
815 FIXME_(module)("Unknown/unsupported fixup type %d.\n", type);
816 break;
817 }
818 }
819 }
820 return 1;
821 }
822
823
824 /***********************************************************************
825 * map_image
826 *
827 * Map an executable (PE format) image into memory.
828 */
829 static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, SIZE_T total_size,
830 SIZE_T header_size, int shared_fd, BOOL removable, PVOID *addr_ptr )
831 {
832 IMAGE_DOS_HEADER *dos;
833 IMAGE_NT_HEADERS *nt;
834 IMAGE_SECTION_HEADER *sec;
835 IMAGE_DATA_DIRECTORY *imports;
836 NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
837 int i;
838 off_t pos;
839 struct stat st;
840 struct file_view *view = NULL;
841 char *ptr;
842
843 /* zero-map the whole range */
844
845 RtlEnterCriticalSection( &csVirtual );
846
847 if (base >= (char *)0x110000) /* make sure the DOS area remains free */
848 status = map_view( &view, base, total_size,
849 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
850
851 if (status == STATUS_CONFLICTING_ADDRESSES)
852 status = map_view( &view, NULL, total_size,
853 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
854
855 if (status != STATUS_SUCCESS) goto error;
856
857 ptr = view->base;
858 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
859
860 /* map the header */
861
862 if (fstat( fd, &st ) == -1)
863 {
864 status = FILE_GetNtStatus();
865 goto error;
866 }
867 status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
868 if (header_size > st.st_size) goto error;
869 if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ,
870 removable ) != STATUS_SUCCESS) goto error;
871 dos = (IMAGE_DOS_HEADER *)ptr;
872 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
873 if ((char *)(nt + 1) > ptr + header_size) goto error;
874
875 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
876 if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
877
878 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
879 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
880
881 /* check the architecture */
882
883 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
884 {
885 MESSAGE("Trying to load PE image for unsupported architecture (");
886 switch (nt->FileHeader.Machine)
887 {
888 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
889 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
890 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
891 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
892 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
893 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
894 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
895 case IMAGE_FILE_MACHINE_IA64: MESSAGE("IA-64"); break;
896 case IMAGE_FILE_MACHINE_ALPHA64: MESSAGE("Alpha-64"); break;
897 case IMAGE_FILE_MACHINE_AMD64: MESSAGE("AMD-64"); break;
898 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
899 }
900 MESSAGE(")\n");
901 goto error;
902 }
903
904 /* check for non page-aligned binary */
905
906 if (nt->OptionalHeader.SectionAlignment <= page_mask)
907 {
908 /* unaligned sections, this happens for native subsystem binaries */
909 /* in that case Windows simply maps in the whole file */
910
911 if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ,
912 removable ) != STATUS_SUCCESS) goto error;
913
914 /* check that all sections are loaded at the right offset */
915 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
916 {
917 if (sec[i].VirtualAddress != sec[i].PointerToRawData)
918 goto error; /* Windows refuses to load in that case too */
919 }
920
921 /* set the image protections */
922 VIRTUAL_SetProt( view, ptr, total_size,
923 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
924
925 /* perform relocations if necessary */
926 /* FIXME: not 100% compatible, Windows doesn't do this for non page-aligned binaries */
927 if (ptr != base)
928 {
929 const IMAGE_DATA_DIRECTORY *relocs;
930 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
931 if (relocs->VirtualAddress && relocs->Size)
932 do_relocations( ptr, relocs, ptr - base, total_size );
933 }
934
935 goto done;
936 }
937
938
939 /* map all the sections */
940
941 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
942 {
943 SIZE_T map_size, file_size, end;
944
945 if (!sec->Misc.VirtualSize)
946 {
947 file_size = sec->SizeOfRawData;
948 map_size = ROUND_SIZE( 0, file_size );
949 }
950 else
951 {
952 map_size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
953 file_size = min( sec->SizeOfRawData, map_size );
954 }
955
956 /* a few sanity checks */
957 end = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, map_size );
958 if (sec->VirtualAddress > total_size || end > total_size || end < sec->VirtualAddress)
959 {
960 ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
961 sec->Name, sec->VirtualAddress, map_size, total_size );
962 goto error;
963 }
964
965 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
966 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
967 {
968 TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
969 sec->Name, ptr + sec->VirtualAddress,
970 sec->PointerToRawData, (int)pos, file_size, map_size,
971 sec->Characteristics );
972 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, map_size, pos,
973 VPROT_COMMITTED | VPROT_READ | PROT_WRITE,
974 FALSE ) != STATUS_SUCCESS)
975 {
976 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
977 goto error;
978 }
979
980 /* check if the import directory falls inside this section */
981 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
982 imports->VirtualAddress < sec->VirtualAddress + map_size)
983 {
984 UINT_PTR base = imports->VirtualAddress & ~page_mask;
985 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
986 if (end > sec->VirtualAddress + map_size) end = sec->VirtualAddress + map_size;
987 if (end > base)
988 map_file_into_view( view, shared_fd, base, end - base,
989 pos + (base - sec->VirtualAddress),
990 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
991 FALSE );
992 }
993 pos += map_size;
994 continue;
995 }
996
997 TRACE_(module)( "mapping section %.8s at %p off %lx size %lx virt %lx flags %lx\n",
998 sec->Name, ptr + sec->VirtualAddress,
999 sec->PointerToRawData, sec->SizeOfRawData,
1000 sec->Misc.VirtualSize, sec->Characteristics );
1001
1002 if (!sec->PointerToRawData || !file_size) continue;
1003
1004 /* Note: if the section is not aligned properly map_file_into_view will magically
1005 * fall back to read(), so we don't need to check anything here.
1006 */
1007 end = sec->PointerToRawData + file_size;
1008 if (sec->PointerToRawData >= st.st_size || end > st.st_size || end < sec->PointerToRawData ||
1009 map_file_into_view( view, fd, sec->VirtualAddress, file_size, sec->PointerToRawData,
1010 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1011 removable ) != STATUS_SUCCESS)
1012 {
1013 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
1014 goto error;
1015 }
1016
1017 if (file_size & page_mask)
1018 {
1019 end = ROUND_SIZE( 0, file_size );
1020 if (end > map_size) end = map_size;
1021 TRACE_(module)("clearing %p - %p\n",
1022 ptr + sec->VirtualAddress + file_size,
1023 ptr + sec->VirtualAddress + end );
1024 memset( ptr + sec->VirtualAddress + file_size, 0, end - file_size );
1025 }
1026 }
1027
1028
1029 /* perform base relocation, if necessary */
1030
1031 if (ptr != base)
1032 {
1033 const IMAGE_DATA_DIRECTORY *relocs;
1034
1035 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1036 if (!relocs->VirtualAddress || !relocs->Size)
1037 {
1038 if (nt->OptionalHeader.ImageBase == 0x400000) {
1039 ERR("Image was mapped at %p: standard load address for a Win32 program (0x00400000) not available\n", ptr);
1040 ERR("Do you have exec-shield or prelink active?\n");
1041 } else
1042 ERR( "FATAL: Need to relocate module from addr %lx, but there are no relocation records\n",
1043 nt->OptionalHeader.ImageBase );
1044 goto error;
1045 }
1046
1047 /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
1048 * really make sure that the *new* base address is also > 2GB.
1049 * Some DLLs really check the MSB of the module handle :-/
1050 */
1051 if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((ULONG_PTR)base & 0x80000000))
1052 ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
1053
1054 if (!do_relocations( ptr, relocs, ptr - base, total_size ))
1055 {
1056 goto error;
1057 }
1058 }
1059
1060 /* set the image protections */
1061
1062 sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
1063 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1064 {
1065 SIZE_T size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
1066 BYTE vprot = VPROT_COMMITTED;
1067 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
1068 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_READ|VPROT_WRITECOPY;
1069 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
1070 VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
1071 }
1072
1073 done:
1074 if (!removable) /* don't keep handle open on removable media */
1075 NtDuplicateObject( NtCurrentProcess(), hmapping,
1076 NtCurrentProcess(), &view->mapping,
1077 0, 0, DUPLICATE_SAME_ACCESS );
1078
1079 RtlLeaveCriticalSection( &csVirtual );
1080
1081 *addr_ptr = ptr;
1082 return STATUS_SUCCESS;
1083
1084 error:
1085 if (view) delete_view( view );
1086 RtlLeaveCriticalSection( &csVirtual );
1087 return status;
1088 }
1089
1090
1091 /***********************************************************************
1092 * is_current_process
1093 *
1094 * Check whether a process handle is for the current process.
1095 */
1096 BOOL is_current_process( HANDLE handle )
1097 {
1098 BOOL ret = FALSE;
1099
1100 if (handle == NtCurrentProcess()) return TRUE;
1101 SERVER_START_REQ( get_process_info )
1102 {
1103 req->handle = handle;
1104 if (!wine_server_call( req ))
1105 ret = ((DWORD)reply->pid == GetCurrentProcessId());
1106 }
1107 SERVER_END_REQ;
1108 return ret;
1109 }
1110
1111
1112 /***********************************************************************
1113 * virtual_init
1114 */
1115 static inline void virtual_init(void)
1116 {
1117 #ifndef page_mask
1118 page_size = getpagesize();
1119 page_mask = page_size - 1;
1120 /* Make sure we have a power of 2 */
1121 assert( !(page_size & page_mask) );
1122 page_shift = 0;
1123 while ((1 << page_shift) != page_size) page_shift++;
1124 #endif /* page_mask */
1125 }
1126
1127
1128 /***********************************************************************
1129 * VIRTUAL_alloc_teb
1130 *
1131 * Allocate a memory view for a new TEB, properly aligned to a multiple of the size.
1132 */
1133 NTSTATUS VIRTUAL_alloc_teb( void **ret, size_t size, BOOL first )
1134 {
1135 void *ptr;
1136 NTSTATUS status;
1137 struct file_view *view;
1138 size_t align_size;
1139 BYTE vprot = VPROT_READ | VPROT_WRITE | VPROT_COMMITTED;
1140
1141 if (first) virtual_init();
1142
1143 *ret = NULL;
1144 size = ROUND_SIZE( 0, size );
1145 align_size = page_size;
1146 while (align_size < size) align_size *= 2;
1147
1148 for (;;)
1149 {
1150 if ((ptr = wine_anon_mmap( NULL, 2 * align_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
1151 {
1152 if (errno == ENOMEM) return STATUS_NO_MEMORY;
1153 return STATUS_INVALID_PARAMETER;
1154 }
1155 if (!is_beyond_limit( ptr, 2 * align_size, user_space_limit ))
1156 {
1157 ptr = unmap_extra_space( ptr, 2 * align_size, align_size, align_size - 1 );
1158 break;
1159 }
1160 /* if we got something beyond the user limit, unmap it and retry */
1161 add_reserved_area( ptr, 2 * align_size );
1162 }
1163
1164 if (!first) RtlEnterCriticalSection( &csVirtual );
1165
1166 status = create_view( &view, ptr, size, vprot );
1167 if (status == STATUS_SUCCESS)
1168 {
1169 view->flags |= VFLAG_VALLOC;
1170 *ret = ptr;
1171 }
1172 else unmap_area( ptr, size );
1173
1174 if (!first) RtlLeaveCriticalSection( &csVirtual );
1175
1176 return status;
1177 }
1178
1179
1180 /***********************************************************************
1181 * VIRTUAL_HandleFault
1182 */
1183 NTSTATUS VIRTUAL_HandleFault( LPCVOID addr )
1184 {
1185 FILE_VIEW *view;
1186 NTSTATUS ret = STATUS_ACCESS_VIOLATION;
1187
1188 RtlEnterCriticalSection( &csVirtual );
1189 if ((view = VIRTUAL_FindView( addr )))
1190 {
1191 void *page = ROUND_ADDR( addr, page_mask );
1192 BYTE vprot = view->prot[((const char *)page - (const char *)view->base) >> page_shift];
1193 if (vprot & VPROT_GUARD)
1194 {
1195 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
1196 ret = STATUS_GUARD_PAGE_VIOLATION;
1197 }
1198 }
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 /* no large address space on win9x */
1229 if (NtCurrentTeb()->Peb->OSPlatformId != VER_PLATFORM_WIN32_NT) return;
1230
1231 RtlEnterCriticalSection( &csVirtual );
1232 remove_reserved_area( user_space_limit, (char *)ADDRESS_SPACE_LIMIT - (char *)user_space_limit );
1233 user_space_limit = ADDRESS_SPACE_LIMIT;
1234 RtlLeaveCriticalSection( &csVirtual );
1235 }
1236
1237
1238 /***********************************************************************
1239 * NtAllocateVirtualMemory (NTDLL.@)
1240 * ZwAllocateVirtualMemory (NTDLL.@)
1241 */
1242 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
1243 SIZE_T *size_ptr, ULONG type, ULONG protect )
1244 {
1245 void *base;
1246 BYTE vprot;
1247 SIZE_T size = *size_ptr;
1248 NTSTATUS status = STATUS_SUCCESS;
1249 struct file_view *view;
1250
1251 TRACE("%p %p %08lx %lx %08lx\n", process, *ret, size, type, protect );
1252
1253 if (!size) return STATUS_INVALID_PARAMETER;
1254
1255 if (!is_current_process( process ))
1256 {
1257 ERR("Unsupported on other process\n");
1258 return STATUS_ACCESS_DENIED;
1259 }
1260
1261 /* Round parameters to a page boundary */
1262
1263 if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
1264
1265 if (*ret)
1266 {
1267 if (type & MEM_RESERVE) /* Round down to 64k boundary */
1268 base = ROUND_ADDR( *ret, granularity_mask );
1269 else
1270 base = ROUND_ADDR( *ret, page_mask );
1271 size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1272
1273 /* disallow low 64k, wrap-around and kernel space */
1274 if (((char *)base <= (char *)granularity_mask) ||
1275 ((char *)base + size < (char *)base) ||
1276 is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
1277 return STATUS_INVALID_PARAMETER;
1278 }
1279 else
1280 {
1281 base = NULL;
1282 size = (size + page_mask) & ~page_mask;
1283 }
1284
1285 if (type & MEM_TOP_DOWN) {
1286 /* FIXME: MEM_TOP_DOWN allocates the largest possible address. */
1287 WARN("MEM_TOP_DOWN ignored\n");
1288 type &= ~MEM_TOP_DOWN;
1289 }
1290
1291 if (zero_bits)
1292 WARN("zero_bits %lu ignored\n", zero_bits);
1293
1294 /* Compute the alloc type flags */
1295
1296 if (!(type & MEM_SYSTEM))
1297 {
1298 if (!(type & (MEM_COMMIT | MEM_RESERVE)) || (type & ~(MEM_COMMIT | MEM_RESERVE)))
1299 {
1300 WARN("called with wrong alloc type flags (%08lx) !\n", type);
1301 return STATUS_INVALID_PARAMETER;
1302 }
1303 }
1304 vprot = VIRTUAL_GetProt( protect );
1305 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
1306
1307 /* Reserve the memory */
1308
1309 RtlEnterCriticalSection( &csVirtual );
1310
1311 if (type & MEM_SYSTEM)
1312 {
1313 if (type & MEM_IMAGE) vprot |= VPROT_IMAGE;
1314 status = create_view( &view, base, size, vprot | VPROT_COMMITTED );
1315 if (status == STATUS_SUCCESS)
1316 {
1317 view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
1318 base = view->base;
1319 }
1320 }
1321 else if ((type & MEM_RESERVE) || !base)
1322 {
1323 status = map_view( &view, base, size, vprot );
1324 if (status == STATUS_SUCCESS)
1325 {
1326 view->flags |= VFLAG_VALLOC;
1327 base = view->base;
1328 }
1329 }
1330 else /* commit the pages */
1331 {
1332 if (!(view = VIRTUAL_FindView( base )) ||
1333 ((char *)base + size > (char *)view->base + view->size)) status = STATUS_NOT_MAPPED_VIEW;
1334 else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1335 }
1336
1337 RtlLeaveCriticalSection( &csVirtual );
1338
1339 if (status == STATUS_SUCCESS)
1340 {
1341 *ret = base;
1342 *size_ptr = size;
1343 }
1344 return status;
1345 }
1346
1347
1348 /***********************************************************************
1349 * NtFreeVirtualMemory (NTDLL.@)
1350 * ZwFreeVirtualMemory (NTDLL.@)
1351 */
1352 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr, ULONG type )
1353 {
1354 FILE_VIEW *view;
1355 char *base;
1356 NTSTATUS status = STATUS_SUCCESS;
1357 LPVOID addr = *addr_ptr;
1358 SIZE_T size = *size_ptr;
1359
1360 TRACE("%p %p %08lx %lx\n", process, addr, size, type );
1361
1362 if (!is_current_process( process ))
1363 {
1364 ERR("Unsupported on other process\n");
1365 return STATUS_ACCESS_DENIED;
1366 }
1367
1368 /* Fix the parameters */
1369
1370 size = ROUND_SIZE( addr, size );
1371 base = ROUND_ADDR( addr, page_mask );
1372
1373 RtlEnterCriticalSection(&csVirtual);
1374
1375 if (!(view = VIRTUAL_FindView( base )) ||
1376 (base + size > (char *)view->base + view->size) ||
1377 !(view->flags & VFLAG_VALLOC))
1378 {
1379 status = STATUS_INVALID_PARAMETER;
1380 }
1381 else if (type & MEM_SYSTEM)
1382 {
1383 /* return the values that the caller should use to unmap the area */
1384 *addr_ptr = view->base;
1385 *size_ptr = view->size;
1386 view->flags |= VFLAG_SYSTEM;
1387 delete_view( view );
1388 }
1389 else if (type == MEM_RELEASE)
1390 {
1391 /* Free the pages */
1392
1393 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
1394 else
1395 {
1396 delete_view( view );
1397 *addr_ptr = base;
1398 *size_ptr = size;
1399 }
1400 }
1401 else if (type == MEM_DECOMMIT)
1402 {
1403 status = decommit_pages( view, base - (char *)view->base, size );
1404 if (status == STATUS_SUCCESS)
1405 {
1406 *addr_ptr = base;
1407 *size_ptr = size;
1408 }
1409 }
1410 else
1411 {
1412 WARN("called with wrong free type flags (%08lx) !\n", type);
1413 status = STATUS_INVALID_PARAMETER;
1414 }
1415
1416 RtlLeaveCriticalSection(&csVirtual);
1417 return status;
1418 }
1419
1420
1421 /***********************************************************************
1422 * NtProtectVirtualMemory (NTDLL.@)
1423 * ZwProtectVirtualMemory (NTDLL.@)
1424 */
1425 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr,
1426 ULONG new_prot, ULONG *old_prot )
1427 {
1428 FILE_VIEW *view;
1429 NTSTATUS status = STATUS_SUCCESS;
1430 char *base;
1431 UINT i;
1432 BYTE vprot, *p;
1433 ULONG prot;
1434 SIZE_T size = *size_ptr;
1435 LPVOID addr = *addr_ptr;
1436
1437 TRACE("%p %p %08lx %08lx\n", process, addr, size, new_prot );
1438
1439 if (!is_current_process( process ))
1440 {
1441 ERR("Unsupported on other process\n");
1442 return STATUS_ACCESS_DENIED;
1443 }
1444
1445 /* Fix the parameters */
1446
1447 size = ROUND_SIZE( addr, size );
1448 base = ROUND_ADDR( addr, page_mask );
1449
1450 RtlEnterCriticalSection( &csVirtual );
1451
1452 if (!(view = VIRTUAL_FindView( base )) || (base + size > (char *)view->base + view->size))
1453 {
1454 status = STATUS_INVALID_PARAMETER;
1455 }
1456 else
1457 {
1458 /* Make sure all the pages are committed */
1459
1460 p = view->prot + ((base - (char *)view->base) >> page_shift);
1461 prot = VIRTUAL_GetWin32Prot( *p );
1462 for (i = size >> page_shift; i; i--, p++)
1463 {
1464 if (!(*p & VPROT_COMMITTED))
1465 {
1466 status = STATUS_NOT_COMMITTED;
1467 break;
1468 }
1469 }
1470 if (!i)
1471 {
1472 if (old_prot) *old_prot = prot;
1473 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1474 if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1475 }
1476 }
1477 RtlLeaveCriticalSection( &csVirtual );
1478
1479 if (status == STATUS_SUCCESS)
1480 {
1481 *addr_ptr = base;
1482 *size_ptr = size;
1483 }
1484 return status;
1485 }
1486
1487 #define UNIMPLEMENTED_INFO_CLASS(c) \
1488 case c: \
1489 FIXME("(process=%p,addr=%p) Unimplemented information class: " #c "\n", process, addr); \
1490 return STATUS_INVALID_INFO_CLASS
1491
1492 /***********************************************************************
1493 * NtQueryVirtualMemory (NTDLL.@)
1494 * ZwQueryVirtualMemory (NTDLL.@)
1495 */
1496 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
1497 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
1498 SIZE_T len, SIZE_T *res_len )
1499 {
1500 FILE_VIEW *view;
1501 char *base, *alloc_base = 0;
1502 struct list *ptr;
1503 SIZE_T size = 0;
1504 MEMORY_BASIC_INFORMATION *info = buffer;
1505
1506 if (info_class != MemoryBasicInformation)
1507 {
1508 switch(info_class)
1509 {
1510 UNIMPLEMENTED_INFO_CLASS(MemoryWorkingSetList);
1511 UNIMPLEMENTED_INFO_CLASS(MemorySectionName);
1512 UNIMPLEMENTED_INFO_CLASS(MemoryBasicVlmInformation);
1513
1514 default:
1515 FIXME("(%p,%p,info_class=%d,%p,%ld,%p) Unknown information class\n",
1516 process, addr, info_class, buffer, len, res_len);
1517 return STATUS_INVALID_INFO_CLASS;
1518 }
1519 }
1520 if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
1521 return STATUS_WORKING_SET_LIMIT_RANGE;
1522
1523 if (!is_current_process( process ))
1524 {
1525 ERR("Unsupported on other process\n");
1526 return STATUS_ACCESS_DENIED;
1527 }
1528
1529 base = ROUND_ADDR( addr, page_mask );
1530
1531 /* Find the view containing the address */
1532
1533 RtlEnterCriticalSection(&csVirtual);
1534 ptr = list_head( &views_list );
1535 for (;;)
1536 {
1537 if (!ptr)
1538 {
1539 /* make the address space end at the user limit, except if
1540 * the last view was mapped beyond that */
1541 if (alloc_base <= (char *)user_space_limit)
1542 {
1543 if (user_space_limit && base >= (char *)user_space_limit)
1544 {
1545 RtlLeaveCriticalSection( &csVirtual );
1546 return STATUS_WORKING_SET_LIMIT_RANGE;
1547 }
1548 size = (char *)user_space_limit - alloc_base;
1549 }
1550 else size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1551 view = NULL;
1552 break;
1553 }
1554 view = LIST_ENTRY( ptr, struct file_view, entry );
1555 if ((char *)view->base > base)
1556 {
1557 size = (char *)view->base - alloc_base;
1558 view = NULL;
1559 break;
1560 }
1561 if ((char *)view->base + view->size > base)
1562 {
1563 alloc_base = view->base;
1564 size = view->size;
1565 break;
1566 }
1567 alloc_base = (char *)view->base + view->size;
1568 ptr = list_next( &views_list, ptr );
1569 }
1570
1571 /* Fill the info structure */
1572
1573 if (!view)
1574 {
1575 info->State = MEM_FREE;
1576 info->Protect = 0;
1577 info->AllocationProtect = 0;
1578 info->Type = 0;
1579 }
1580 else
1581 {
1582 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1583 info->State = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
1584 info->Protect = VIRTUAL_GetWin32Prot( vprot );
1585 info->AllocationProtect = VIRTUAL_GetWin32Prot( view->protect );
1586 if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
1587 else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
1588 else info->Type = MEM_MAPPED;
1589 for (size = base - alloc_base; size < view->size; size += page_mask+1)
1590 if (view->prot[size >> page_shift] != vprot) break;
1591 }
1592 RtlLeaveCriticalSection(&csVirtual);
1593
1594 info->BaseAddress = (LPVOID)base;
1595 info->AllocationBase = (LPVOID)alloc_base;
1596 info->RegionSize = size - (base - alloc_base);
1597 if (res_len) *res_len = sizeof(*info);
1598 return STATUS_SUCCESS;
1599 }
1600
1601
1602 /***********************************************************************
1603 * NtLockVirtualMemory (NTDLL.@)
1604 * ZwLockVirtualMemory (NTDLL.@)
1605 */
1606 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1607 {
1608 if (!is_current_process( process ))
1609 {
1610 ERR("Unsupported on other process\n");
1611 return STATUS_ACCESS_DENIED;
1612 }
1613 return STATUS_SUCCESS;
1614 }
1615
1616
1617 /***********************************************************************
1618 * NtUnlockVirtualMemory (NTDLL.@)
1619 * ZwUnlockVirtualMemory (NTDLL.@)
1620 */
1621 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1622 {
1623 if (!is_current_process( process ))
1624 {
1625 ERR("Unsupported on other process\n");
1626 return STATUS_ACCESS_DENIED;
1627 }
1628 return STATUS_SUCCESS;
1629 }
1630
1631
1632 /***********************************************************************
1633 * NtCreateSection (NTDLL.@)
1634 * ZwCreateSection (NTDLL.@)
1635 */
1636 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
1637 const LARGE_INTEGER *size, ULONG protect,
1638 ULONG sec_flags, HANDLE file )
1639 {
1640 NTSTATUS ret;
1641 BYTE vprot;
1642 DWORD len = (attr && attr->ObjectName) ? attr->ObjectName->Length : 0;
1643
1644 /* Check parameters */
1645
1646 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1647
1648 vprot = VIRTUAL_GetProt( protect );
1649 if (sec_flags & SEC_RESERVE)
1650 {
1651 if (file) return STATUS_INVALID_PARAMETER;
1652 }
1653 else vprot |= VPROT_COMMITTED;
1654 if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1655 if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
1656
1657 /* Create the server object */
1658
1659 SERVER_START_REQ( create_mapping )
1660 {
1661 req->access = access;
1662 req->attributes = (attr) ? attr->Attributes : 0;
1663 req->rootdir = attr ? attr->RootDirectory : 0;
1664 req->file_handle = file;
1665 req->size_high = size ? size->u.HighPart : 0;
1666 req->size_low = size ? size->u.LowPart : 0;
1667 req->protect = vprot;
1668 if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
1669 ret = wine_server_call( req );
1670 *handle = reply->handle;
1671 }
1672 SERVER_END_REQ;
1673 return ret;
1674 }
1675
1676
1677 /***********************************************************************
1678 * NtOpenSection (NTDLL.@)
1679 * ZwOpenSection (NTDLL.@)
1680 */
1681 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
1682 {
1683 NTSTATUS ret;
1684 DWORD len = attr->ObjectName->Length;
1685
1686 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1687
1688 SERVER_START_REQ( open_mapping )
1689 {
1690 req->access = access;
1691 req->attributes = (attr) ? attr->Attributes : 0;
1692 req->rootdir = attr ? attr->RootDirectory : 0;
1693 wine_server_add_data( req, attr->ObjectName->Buffer, len );
1694 if (!(ret = wine_server_call( req ))) *handle = reply->handle;
1695 }
1696 SERVER_END_REQ;
1697 return ret;
1698 }
1699
1700
1701 /***********************************************************************
1702 * NtMapViewOfSection (NTDLL.@)
1703 * ZwMapViewOfSection (NTDLL.@)
1704 */
1705 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
1706 SIZE_T commit_size, const LARGE_INTEGER *offset_ptr, SIZE_T *size_ptr,
1707 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
1708 {
1709 FILE_FS_DEVICE_INFORMATION device_info;
1710 NTSTATUS res;
1711 SIZE_T size = 0;
1712 int unix_handle = -1;
1713 int prot;
1714 void *base;
1715 struct file_view *view;
1716 DWORD size_low, size_high, header_size, shared_size;
1717 HANDLE shared_file;
1718 BOOL removable = FALSE;
1719 LARGE_INTEGER offset;
1720
1721 offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
1722
1723 TRACE("handle=%p process=%p addr=%p off=%lx%08lx size=%lx access=%lx\n",
1724 handle, process, *addr_ptr, offset.u.HighPart, offset.u.LowPart, size, protect );
1725
1726 if (!is_current_process( process ))
1727 {
1728 ERR("Unsupported on other process\n");
1729 return STATUS_ACCESS_DENIED;
1730 }
1731
1732 /* Check parameters */
1733
1734 if ((offset.u.LowPart & granularity_mask) ||
1735 (*addr_ptr && ((UINT_PTR)*addr_ptr & granularity_mask)))
1736 return STATUS_INVALID_PARAMETER;
1737
1738 SERVER_START_REQ( get_mapping_info )
1739 {
1740 req->handle = handle;
1741 res = wine_server_call( req );
1742 prot = reply->protect;
1743 base = reply->base;
1744 size_low = reply->size_low;
1745 size_high = reply->size_high;
1746 header_size = reply->header_size;
1747 shared_file = reply->shared_file;
1748 shared_size = reply->shared_size;
1749 }
1750 SERVER_END_REQ;
1751 if (res) return res;
1752
1753 if ((res = wine_server_handle_to_fd( handle, 0, &unix_handle, NULL ))) return res;
1754
1755 if (FILE_GetDeviceInfo( unix_handle, &device_info ) == STATUS_SUCCESS)
1756 removable = device_info.Characteristics & FILE_REMOVABLE_MEDIA;
1757
1758 if (prot & VPROT_IMAGE)
1759 {
1760 if (shared_file)
1761 {
1762 int shared_fd;
1763
1764 if ((res = wine_server_handle_to_fd( shared_file, FILE_READ_DATA|FILE_WRITE_DATA,
1765 &shared_fd, NULL ))) goto done;
1766 res = map_image( handle, unix_handle, base, size_low, header_size,
1767 shared_fd, removable, addr_ptr );
1768 wine_server_release_fd( shared_file, shared_fd );
1769 NtClose( shared_file );
1770 }
1771 else
1772 {
1773 res = map_image( handle, unix_handle, base, size_low, header_size,
1774 -1, removable, addr_ptr );
1775 }
1776 wine_server_release_fd( handle, unix_handle );
1777 if (!res) *size_ptr = size_low;
1778 return res;
1779 }
1780
1781 if (size_high)
1782 ERR("Sizes larger than 4Gb not supported\n");
1783
1784 if ((offset.u.LowPart >= size_low) ||
1785 (*size_ptr > size_low - offset.u.LowPart))
1786 {
1787 res = STATUS_INVALID_PARAMETER;
1788 goto done;
1789 }
1790 if (*size_ptr) size = ROUND_SIZE( offset.u.LowPart, *size_ptr );
1791 else size = size_low - offset.u.LowPart;
1792
1793 switch(protect)
1794 {
1795 case PAGE_NOACCESS:
1796 break;
1797 case PAGE_READWRITE:
1798 case PAGE_EXECUTE_READWRITE:
1799 if (!(prot & VPROT_WRITE))
1800 {
1801 res = STATUS_INVALID_PARAMETER;
1802 goto done;
1803 }
1804 removable = FALSE;
1805 /* fall through */
1806 case PAGE_READONLY:
1807 case PAGE_WRITECOPY:
1808 case PAGE_EXECUTE:
1809 case PAGE_EXECUTE_READ:
1810 case PAGE_EXECUTE_WRITECOPY:
1811 if (prot & VPROT_READ) break;
1812 /* fall through */
1813 default:
1814 res = STATUS_INVALID_PARAMETER;
1815 goto done;
1816 }
1817
1818 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1819 * which has a view of this mapping commits some pages, they will
1820 * appear commited in all other processes, which have the same
1821 * view created. Since we don`t support this yet, we create the
1822 * whole mapping commited.
1823 */
1824 prot |= VPROT_COMMITTED;
1825
1826 /* Reserve a properly aligned area */
1827
1828 RtlEnterCriticalSection( &csVirtual );
1829
1830 res = map_view( &view, *addr_ptr, size, prot );
1831 if (res)
1832 {
1833 RtlLeaveCriticalSection( &csVirtual );
1834 goto done;
1835 }
1836
1837 /* Map the file */
1838
1839 TRACE("handle=%p size=%lx offset=%lx%08lx\n",
1840 handle, size, offset.u.HighPart, offset.u.LowPart );
1841
1842 res = map_file_into_view( view, unix_handle, 0, size, offset.QuadPart, prot, removable );
1843 if (res == STATUS_SUCCESS)
1844 {
1845 if (!removable) /* don't keep handle open on removable media */
1846 NtDuplicateObject( NtCurrentProcess(), handle,
1847 NtCurrentProcess(), &view->mapping,
1848 0, 0, DUPLICATE_SAME_ACCESS );
1849
1850 *addr_ptr = view->base;
1851 *size_ptr = size;
1852 }
1853 else
1854 {
1855 ERR( "map_file_into_view %p %lx %lx%08lx failed\n",
1856 view->base, size, offset.u.HighPart, offset.u.LowPart );
1857 delete_view( view );
1858 }
1859
1860 RtlLeaveCriticalSection( &csVirtual );
1861
1862 done:
1863 wine_server_release_fd( handle, unix_handle );
1864 return res;
1865 }
1866
1867
1868 /***********************************************************************
1869 * NtUnmapViewOfSection (NTDLL.@)
1870 * ZwUnmapViewOfSection (NTDLL.@)
1871 */
1872 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
1873 {
1874 FILE_VIEW *view;
1875 NTSTATUS status = STATUS_INVALID_PARAMETER;
1876 void *base = ROUND_ADDR( addr, page_mask );
1877
1878 if (!is_current_process( process ))
1879 {
1880 ERR("Unsupported on other process\n");
1881 return STATUS_ACCESS_DENIED;
1882 }
1883 RtlEnterCriticalSection( &csVirtual );
1884 if ((view = VIRTUAL_FindView( base )) && (base == view->base))
1885 {
1886 delete_view( view );
1887 status = STATUS_SUCCESS;
1888 }
1889 RtlLeaveCriticalSection( &csVirtual );
1890 return status;
1891 }
1892
1893
1894 /***********************************************************************
1895 * NtFlushVirtualMemory (NTDLL.@)
1896 * ZwFlushVirtualMemory (NTDLL.@)
1897 */
1898 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
1899 SIZE_T *size_ptr, ULONG unknown )
1900 {
1901 FILE_VIEW *view;
1902 NTSTATUS status = STATUS_SUCCESS;
1903 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
1904
1905 if (!is_current_process( process ))
1906 {
1907 ERR("Unsupported on other process\n");
1908 return STATUS_ACCESS_DENIED;
1909 }
1910 RtlEnterCriticalSection( &csVirtual );
1911 if (!(view = VIRTUAL_FindView( addr ))) status = STATUS_INVALID_PARAMETER;
1912 else
1913 {
1914 if (!*size_ptr) *size_ptr = view->size;
1915 *addr_ptr = addr;
1916 if (msync( addr, *size_ptr, MS_SYNC )) status = STATUS_NOT_MAPPED_DATA;
1917 }
1918 RtlLeaveCriticalSection( &csVirtual );
1919 return status;
1920 }
1921
1922
1923 /***********************************************************************
1924 * NtReadVirtualMemory (NTDLL.@)
1925 * ZwReadVirtualMemory (NTDLL.@)
1926 */
1927 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
1928 SIZE_T size, SIZE_T *bytes_read )
1929 {
1930 NTSTATUS status;
1931
1932 SERVER_START_REQ( read_process_memory )
1933 {
1934 req->handle = process;
1935 req->addr = (void *)addr;
1936 wine_server_set_reply( req, buffer, size );
1937 if ((status = wine_server_call( req ))) size = 0;
1938 }
1939 SERVER_END_REQ;
1940 if (bytes_read) *bytes_read = size;
1941 return status;
1942 }
1943
1944
1945 /***********************************************************************
1946 * NtWriteVirtualMemory (NTDLL.@)
1947 * ZwWriteVirtualMemory (NTDLL.@)
1948 */
1949 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
1950 SIZE_T size, SIZE_T *bytes_written )
1951 {
1952 static const unsigned int zero;
1953 SIZE_T first_offset, last_offset, first_mask, last_mask;
1954 NTSTATUS status;
1955
1956 if (!size) return STATUS_INVALID_PARAMETER;
1957
1958 /* compute the mask for the first int */
1959 first_mask = ~0;
1960 first_offset = (ULONG_PTR)addr % sizeof(int);
1961 memset( &first_mask, 0, first_offset );
1962
1963 /* compute the mask for the last int */
1964 last_offset = (size + first_offset) % sizeof(int);
1965 last_mask = 0;
1966 memset( &last_mask, 0xff, last_offset ? last_offset : sizeof(int) );
1967
1968 SERVER_START_REQ( write_process_memory )
1969 {
1970 req->handle = process;
1971 req->addr = (char *)addr - first_offset;
1972 req->first_mask = first_mask;
1973 req->last_mask = last_mask;
1974 if (first_offset) wine_server_add_data( req, &zero, first_offset );
1975 wine_server_add_data( req, buffer, size );
1976 if (last_offset) wine_server_add_data( req, &zero, sizeof(int) - last_offset );
1977
1978 if ((status = wine_server_call( req ))) size = 0;
1979 }
1980 SERVER_END_REQ;
1981 if (bytes_written) *bytes_written = size;
1982 return status;
1983 }
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