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Use FILE_GetDeviceInfo in NtMapViewOfSection to avoid having to fetch
[wine/testsucceed.git] / dlls / ntdll / virtual.c
blob0d56b66ff38488a2a57767c64682a70e266900dc
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, { 0, (DWORD)(__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_mask;
124 static UINT page_size;
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 #define granularity_mask 0xffff /* Allocation granularity (usually 64k) */
129
130 #define ROUND_ADDR(addr,mask) \
131 ((void *)((UINT_PTR)(addr) & ~(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( !((unsigned int)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 * map_view
553 *
554 * Create a view and mmap the corresponding memory area.
555 * The csVirtual section must be held by caller.
556 */
557 static NTSTATUS map_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
558 {
559 void *ptr;
560 NTSTATUS status;
561
562 if (base)
563 {
564 if (is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
565 return STATUS_WORKING_SET_LIMIT_RANGE;
566
567 switch (wine_mmap_is_in_reserved_area( base, size ))
568 {
569 case -1: /* partially in a reserved area */
570 return STATUS_CONFLICTING_ADDRESSES;
571
572 case 0: /* not in a reserved area, do a normal allocation */
573 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
574 {
575 if (errno == ENOMEM) return STATUS_NO_MEMORY;
576 return STATUS_INVALID_PARAMETER;
577 }
578 if (ptr != base)
579 {
580 /* We couldn't get the address we wanted */
581 if (is_beyond_limit( ptr, size, user_space_limit )) add_reserved_area( ptr, size );
582 else munmap( ptr, size );
583 return STATUS_CONFLICTING_ADDRESSES;
584 }
585 break;
586
587 default:
588 case 1: /* in a reserved area, make sure the address is available */
589 if (find_view_range( base, size )) return STATUS_CONFLICTING_ADDRESSES;
590 /* replace the reserved area by our mapping */
591 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED )) != base)
592 return STATUS_INVALID_PARAMETER;
593 break;
594 }
595 }
596 else
597 {
598 size_t view_size = size + granularity_mask + 1;
599
600 for (;;)
601 {
602 if ((ptr = wine_anon_mmap( NULL, view_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
603 {
604 if (errno == ENOMEM) return STATUS_NO_MEMORY;
605 return STATUS_INVALID_PARAMETER;
606 }
607 /* if we got something beyond the user limit, unmap it and retry */
608 if (is_beyond_limit( ptr, view_size, user_space_limit )) add_reserved_area( ptr, view_size );
609 else break;
610 }
611
612 /* Release the extra memory while keeping the range
613 * starting on the granularity boundary. */
614 if ((ULONG_PTR)ptr & granularity_mask)
615 {
616 size_t extra = granularity_mask + 1 - ((ULONG_PTR)ptr & granularity_mask);
617 munmap( ptr, extra );
618 ptr = (char *)ptr + extra;
619 view_size -= extra;
620 }
621 if (view_size > size)
622 munmap( (char *)ptr + size, view_size - size );
623 }
624
625 status = create_view( view_ret, ptr, size, vprot );
626 if (status != STATUS_SUCCESS) unmap_area( ptr, size );
627 return status;
628 }
629
630
631 /***********************************************************************
632 * unaligned_mmap
633 *
634 * Linux kernels before 2.4.x can support non page-aligned offsets, as
635 * long as the offset is aligned to the filesystem block size. This is
636 * a big performance gain so we want to take advantage of it.
637 *
638 * However, when we use 64-bit file support this doesn't work because
639 * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
640 * in that it rounds unaligned offsets down to a page boundary. For
641 * these reasons we do a direct system call here.
642 */
643 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
644 unsigned int flags, int fd, off_t offset )
645 {
646 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
647 if (!(offset >> 32) && (offset & page_mask))
648 {
649 int ret;
650
651 struct
652 {
653 void *addr;
654 unsigned int length;
655 unsigned int prot;
656 unsigned int flags;
657 unsigned int fd;
658 unsigned int offset;
659 } args;
660
661 args.addr = addr;
662 args.length = length;
663 args.prot = prot;
664 args.flags = flags;
665 args.fd = fd;
666 args.offset = offset;
667
668 __asm__ __volatile__("push %%ebx\n\t"
669 "movl %2,%%ebx\n\t"
670 "int $0x80\n\t"
671 "popl %%ebx"
672 : "=a" (ret)
673 : "0" (90), /* SYS_mmap */
674 "q" (&args)
675 : "memory" );
676 if (ret < 0 && ret > -4096)
677 {
678 errno = -ret;
679 ret = -1;
680 }
681 return (void *)ret;
682 }
683 #endif
684 return mmap( addr, length, prot, flags, fd, offset );
685 }
686
687
688 /***********************************************************************
689 * map_file_into_view
690 *
691 * Wrapper for mmap() to map a file into a view, falling back to read if mmap fails.
692 * The csVirtual section must be held by caller.
693 */
694 static NTSTATUS map_file_into_view( struct file_view *view, int fd, size_t start, size_t size,
695 off_t offset, BYTE vprot, BOOL removable )
696 {
697 void *ptr;
698 int prot = VIRTUAL_GetUnixProt( vprot );
699 BOOL shared_write = (vprot & VPROT_WRITE) != 0;
700
701 assert( start < view->size );
702 assert( start + size <= view->size );
703
704 /* only try mmap if media is not removable (or if we require write access) */
705 if (!removable || shared_write)
706 {
707 int flags = MAP_FIXED | (shared_write ? MAP_SHARED : MAP_PRIVATE);
708
709 if (unaligned_mmap( (char *)view->base + start, size, prot, flags, fd, offset ) != (void *)-1)
710 goto done;
711
712 /* mmap() failed; if this is because the file offset is not */
713 /* page-aligned (EINVAL), or because the underlying filesystem */
714 /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
715 if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return FILE_GetNtStatus();
716 if (shared_write) return FILE_GetNtStatus(); /* we cannot fake shared write mappings */
717 }
718
719 /* Reserve the memory with an anonymous mmap */
720 ptr = wine_anon_mmap( (char *)view->base + start, size, PROT_READ | PROT_WRITE, MAP_FIXED );
721 if (ptr == (void *)-1) return FILE_GetNtStatus();
722 /* Now read in the file */
723 pread( fd, ptr, size, offset );
724 if (prot != (PROT_READ|PROT_WRITE)) mprotect( ptr, size, prot ); /* Set the right protection */
725 done:
726 memset( view->prot + (start >> page_shift), vprot, size >> page_shift );
727 return STATUS_SUCCESS;
728 }
729
730
731 /***********************************************************************
732 * decommit_view
733 *
734 * Decommit some pages of a given view.
735 * The csVirtual section must be held by caller.
736 */
737 static NTSTATUS decommit_pages( struct file_view *view, size_t start, size_t size )
738 {
739 if (wine_anon_mmap( (char *)view->base + start, size, PROT_NONE, MAP_FIXED ) != (void *)-1)
740 {
741 BYTE *p = view->prot + (start >> page_shift);
742 size >>= page_shift;
743 while (size--) *p++ &= ~VPROT_COMMITTED;
744 return STATUS_SUCCESS;
745 }
746 return FILE_GetNtStatus();
747 }
748
749
750 /***********************************************************************
751 * do_relocations
752 *
753 * Apply the relocations to a mapped PE image
754 */
755 static int do_relocations( char *base, const IMAGE_DATA_DIRECTORY *dir,
756 int delta, SIZE_T total_size )
757 {
758 IMAGE_BASE_RELOCATION *rel;
759
760 TRACE_(module)( "relocating from %p-%p to %p-%p\n",
761 base - delta, base - delta + total_size, base, base + total_size );
762
763 for (rel = (IMAGE_BASE_RELOCATION *)(base + dir->VirtualAddress);
764 ((char *)rel < base + dir->VirtualAddress + dir->Size) && rel->SizeOfBlock;
765 rel = (IMAGE_BASE_RELOCATION*)((char*)rel + rel->SizeOfBlock) )
766 {
767 char *page = base + rel->VirtualAddress;
768 WORD *TypeOffset = (WORD *)(rel + 1);
769 int i, count = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(*TypeOffset);
770
771 if (!count) continue;
772
773 /* sanity checks */
774 if ((char *)rel + rel->SizeOfBlock > base + dir->VirtualAddress + dir->Size ||
775 page > base + total_size)
776 {
777 ERR_(module)("invalid relocation %p,%lx,%ld at %p,%lx,%lx\n",
778 rel, rel->VirtualAddress, rel->SizeOfBlock,
779 base, dir->VirtualAddress, dir->Size );
780 return 0;
781 }
782
783 TRACE_(module)("%ld relocations for page %lx\n", rel->SizeOfBlock, rel->VirtualAddress);
784
785 /* patching in reverse order */
786 for (i = 0 ; i < count; i++)
787 {
788 int offset = TypeOffset[i] & 0xFFF;
789 int type = TypeOffset[i] >> 12;
790 switch(type)
791 {
792 case IMAGE_REL_BASED_ABSOLUTE:
793 break;
794 case IMAGE_REL_BASED_HIGH:
795 *(short*)(page+offset) += HIWORD(delta);
796 break;
797 case IMAGE_REL_BASED_LOW:
798 *(short*)(page+offset) += LOWORD(delta);
799 break;
800 case IMAGE_REL_BASED_HIGHLOW:
801 *(int*)(page+offset) += delta;
802 /* FIXME: if this is an exported address, fire up enhanced logic */
803 break;
804 default:
805 FIXME_(module)("Unknown/unsupported fixup type %d.\n", type);
806 break;
807 }
808 }
809 }
810 return 1;
811 }
812
813
814 /***********************************************************************
815 * map_image
816 *
817 * Map an executable (PE format) image into memory.
818 */
819 static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, SIZE_T total_size,
820 SIZE_T header_size, int shared_fd, BOOL removable, PVOID *addr_ptr )
821 {
822 IMAGE_DOS_HEADER *dos;
823 IMAGE_NT_HEADERS *nt;
824 IMAGE_SECTION_HEADER *sec;
825 IMAGE_DATA_DIRECTORY *imports;
826 NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
827 int i;
828 off_t pos;
829 struct file_view *view = NULL;
830 char *ptr;
831
832 /* zero-map the whole range */
833
834 RtlEnterCriticalSection( &csVirtual );
835
836 if (base >= (char *)0x110000) /* make sure the DOS area remains free */
837 status = map_view( &view, base, total_size,
838 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
839
840 if (status == STATUS_CONFLICTING_ADDRESSES)
841 status = map_view( &view, NULL, total_size,
842 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
843
844 if (status != STATUS_SUCCESS) goto error;
845
846 ptr = view->base;
847 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
848
849 /* map the header */
850
851 status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
852 if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ,
853 removable ) != STATUS_SUCCESS) goto error;
854 dos = (IMAGE_DOS_HEADER *)ptr;
855 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
856 if ((char *)(nt + 1) > ptr + header_size) goto error;
857
858 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
859 if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
860
861 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
862 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
863
864 /* check the architecture */
865
866 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
867 {
868 MESSAGE("Trying to load PE image for unsupported architecture (");
869 switch (nt->FileHeader.Machine)
870 {
871 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
872 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
873 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
874 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
875 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
876 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
877 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
878 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
879 }
880 MESSAGE(")\n");
881 goto error;
882 }
883
884 /* check for non page-aligned binary */
885
886 if (nt->OptionalHeader.SectionAlignment <= page_mask)
887 {
888 /* unaligned sections, this happens for native subsystem binaries */
889 /* in that case Windows simply maps in the whole file */
890
891 if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ,
892 removable ) != STATUS_SUCCESS) goto error;
893
894 /* check that all sections are loaded at the right offset */
895 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
896 {
897 if (sec[i].VirtualAddress != sec[i].PointerToRawData)
898 goto error; /* Windows refuses to load in that case too */
899 }
900
901 /* set the image protections */
902 VIRTUAL_SetProt( view, ptr, total_size,
903 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
904
905 /* perform relocations if necessary */
906 /* FIXME: not 100% compatible, Windows doesn't do this for non page-aligned binaries */
907 if (ptr != base)
908 {
909 const IMAGE_DATA_DIRECTORY *relocs;
910 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
911 if (relocs->VirtualAddress && relocs->Size)
912 do_relocations( ptr, relocs, ptr - base, total_size );
913 }
914
915 goto done;
916 }
917
918
919 /* map all the sections */
920
921 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
922 {
923 SIZE_T map_size, file_size, end;
924
925 if (!sec->Misc.VirtualSize)
926 {
927 file_size = sec->SizeOfRawData;
928 map_size = ROUND_SIZE( 0, file_size );
929 }
930 else
931 {
932 map_size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
933 file_size = min( sec->SizeOfRawData, map_size );
934 }
935
936 /* a few sanity checks */
937 end = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, map_size );
938 if (sec->VirtualAddress > total_size || end > total_size || end < sec->VirtualAddress)
939 {
940 ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
941 sec->Name, sec->VirtualAddress, map_size, total_size );
942 goto error;
943 }
944
945 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
946 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
947 {
948 TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
949 sec->Name, ptr + sec->VirtualAddress,
950 sec->PointerToRawData, (int)pos, file_size, map_size,
951 sec->Characteristics );
952 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, map_size, pos,
953 VPROT_COMMITTED | VPROT_READ | PROT_WRITE,
954 FALSE ) != STATUS_SUCCESS)
955 {
956 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
957 goto error;
958 }
959
960 /* check if the import directory falls inside this section */
961 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
962 imports->VirtualAddress < sec->VirtualAddress + map_size)
963 {
964 UINT_PTR base = imports->VirtualAddress & ~page_mask;
965 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
966 if (end > sec->VirtualAddress + map_size) end = sec->VirtualAddress + map_size;
967 if (end > base)
968 map_file_into_view( view, shared_fd, base, end - base,
969 pos + (base - sec->VirtualAddress),
970 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
971 FALSE );
972 }
973 pos += map_size;
974 continue;
975 }
976
977 TRACE_(module)( "mapping section %.8s at %p off %lx size %lx virt %lx flags %lx\n",
978 sec->Name, ptr + sec->VirtualAddress,
979 sec->PointerToRawData, sec->SizeOfRawData,
980 sec->Misc.VirtualSize, sec->Characteristics );
981
982 if (!sec->PointerToRawData || !file_size) continue;
983
984 /* Note: if the section is not aligned properly map_file_into_view will magically
985 * fall back to read(), so we don't need to check anything here.
986 */
987 if (map_file_into_view( view, fd, sec->VirtualAddress, file_size, sec->PointerToRawData,
988 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
989 removable ) != STATUS_SUCCESS)
990 {
991 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
992 goto error;
993 }
994
995 if (file_size & page_mask)
996 {
997 end = ROUND_SIZE( 0, file_size );
998 if (end > map_size) end = map_size;
999 TRACE_(module)("clearing %p - %p\n",
1000 ptr + sec->VirtualAddress + file_size,
1001 ptr + sec->VirtualAddress + end );
1002 memset( ptr + sec->VirtualAddress + file_size, 0, end - file_size );
1003 }
1004 }
1005
1006
1007 /* perform base relocation, if necessary */
1008
1009 if (ptr != base)
1010 {
1011 const IMAGE_DATA_DIRECTORY *relocs;
1012
1013 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1014 if (!relocs->VirtualAddress || !relocs->Size)
1015 {
1016 if (nt->OptionalHeader.ImageBase == 0x400000) {
1017 ERR("Image was mapped at %p: standard load address for a Win32 program (0x00400000) not available\n", ptr);
1018 ERR("Do you have exec-shield or prelink active?\n");
1019 } else
1020 ERR( "FATAL: Need to relocate module from addr %lx, but there are no relocation records\n",
1021 nt->OptionalHeader.ImageBase );
1022 goto error;
1023 }
1024
1025 /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
1026 * really make sure that the *new* base address is also > 2GB.
1027 * Some DLLs really check the MSB of the module handle :-/
1028 */
1029 if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((DWORD)base & 0x80000000))
1030 ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
1031
1032 if (!do_relocations( ptr, relocs, ptr - base, total_size ))
1033 {
1034 goto error;
1035 }
1036 }
1037
1038 /* set the image protections */
1039
1040 sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
1041 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1042 {
1043 SIZE_T size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
1044 BYTE vprot = VPROT_COMMITTED;
1045 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
1046 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_READ|VPROT_WRITECOPY;
1047 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
1048 VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
1049 }
1050
1051 done:
1052 if (!removable) /* don't keep handle open on removable media */
1053 NtDuplicateObject( NtCurrentProcess(), hmapping,
1054 NtCurrentProcess(), &view->mapping,
1055 0, 0, DUPLICATE_SAME_ACCESS );
1056
1057 RtlLeaveCriticalSection( &csVirtual );
1058
1059 *addr_ptr = ptr;
1060 return STATUS_SUCCESS;
1061
1062 error:
1063 if (view) delete_view( view );
1064 RtlLeaveCriticalSection( &csVirtual );
1065 return status;
1066 }
1067
1068
1069 /***********************************************************************
1070 * is_current_process
1071 *
1072 * Check whether a process handle is for the current process.
1073 */
1074 BOOL is_current_process( HANDLE handle )
1075 {
1076 BOOL ret = FALSE;
1077
1078 if (handle == NtCurrentProcess()) return TRUE;
1079 SERVER_START_REQ( get_process_info )
1080 {
1081 req->handle = handle;
1082 if (!wine_server_call( req ))
1083 ret = ((DWORD)reply->pid == GetCurrentProcessId());
1084 }
1085 SERVER_END_REQ;
1086 return ret;
1087 }
1088
1089
1090 /***********************************************************************
1091 * virtual_init
1092 */
1093 static inline void virtual_init(void)
1094 {
1095 #ifndef page_mask
1096 page_size = getpagesize();
1097 page_mask = page_size - 1;
1098 /* Make sure we have a power of 2 */
1099 assert( !(page_size & page_mask) );
1100 page_shift = 0;
1101 while ((1 << page_shift) != page_size) page_shift++;
1102 #endif /* page_mask */
1103 }
1104
1105
1106 /***********************************************************************
1107 * VIRTUAL_alloc_teb
1108 *
1109 * Allocate a memory view for a new TEB. We don't care about granularity for TEBs.
1110 */
1111 NTSTATUS VIRTUAL_alloc_teb( void **ret, size_t size, BOOL first )
1112 {
1113 void *ptr;
1114 NTSTATUS status;
1115 struct file_view *view;
1116 BYTE vprot = VPROT_READ | VPROT_WRITE | VPROT_COMMITTED;
1117
1118 if (first) virtual_init();
1119
1120 *ret = NULL;
1121 size = ROUND_SIZE( 0, size );
1122
1123 for (;;)
1124 {
1125 if ((ptr = wine_anon_mmap( NULL, size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
1126 {
1127 if (errno == ENOMEM) return STATUS_NO_MEMORY;
1128 return STATUS_INVALID_PARAMETER;
1129 }
1130 /* if we got something beyond the user limit, unmap it and retry */
1131 if (is_beyond_limit( ptr, size, user_space_limit )) add_reserved_area( ptr, size );
1132 else break;
1133 }
1134
1135 if (!first) RtlEnterCriticalSection( &csVirtual );
1136
1137 status = create_view( &view, ptr, size, vprot );
1138 if (status == STATUS_SUCCESS)
1139 {
1140 view->flags |= VFLAG_VALLOC;
1141 *ret = ptr;
1142 }
1143 else unmap_area( ptr, size );
1144
1145 if (!first) RtlLeaveCriticalSection( &csVirtual );
1146
1147 return status;
1148 }
1149
1150
1151 /***********************************************************************
1152 * VIRTUAL_HandleFault
1153 */
1154 NTSTATUS VIRTUAL_HandleFault( LPCVOID addr )
1155 {
1156 FILE_VIEW *view;
1157 NTSTATUS ret = STATUS_ACCESS_VIOLATION;
1158
1159 RtlEnterCriticalSection( &csVirtual );
1160 if ((view = VIRTUAL_FindView( addr )))
1161 {
1162 BYTE vprot = view->prot[((const char *)addr - (const char *)view->base) >> page_shift];
1163 void *page = (void *)((UINT_PTR)addr & ~page_mask);
1164 char *stack = NtCurrentTeb()->Tib.StackLimit;
1165 if (vprot & VPROT_GUARD)
1166 {
1167 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
1168 ret = STATUS_GUARD_PAGE_VIOLATION;
1169 }
1170 /* is it inside the stack guard page? */
1171 if (((const char *)addr >= stack) && ((const char *)addr < stack + (page_mask+1)))
1172 ret = STATUS_STACK_OVERFLOW;
1173 }
1174 RtlLeaveCriticalSection( &csVirtual );
1175 return ret;
1176 }
1177
1178 /***********************************************************************
1179 * VIRTUAL_HasMapping
1180 *
1181 * Check if the specified view has an associated file mapping.
1182 */
1183 BOOL VIRTUAL_HasMapping( LPCVOID addr )
1184 {
1185 FILE_VIEW *view;
1186 BOOL ret = FALSE;
1187
1188 RtlEnterCriticalSection( &csVirtual );
1189 if ((view = VIRTUAL_FindView( addr ))) ret = (view->mapping != 0);
1190 RtlLeaveCriticalSection( &csVirtual );
1191 return ret;
1192 }
1193
1194
1195 /***********************************************************************
1196 * VIRTUAL_UseLargeAddressSpace
1197 *
1198 * Increase the address space size for apps that support it.
1199 */
1200 void VIRTUAL_UseLargeAddressSpace(void)
1201 {
1202 if (user_space_limit >= ADDRESS_SPACE_LIMIT) return;
1203 RtlEnterCriticalSection( &csVirtual );
1204 remove_reserved_area( user_space_limit, (char *)ADDRESS_SPACE_LIMIT - (char *)user_space_limit );
1205 user_space_limit = ADDRESS_SPACE_LIMIT;
1206 RtlLeaveCriticalSection( &csVirtual );
1207 }
1208
1209
1210 /***********************************************************************
1211 * NtAllocateVirtualMemory (NTDLL.@)
1212 * ZwAllocateVirtualMemory (NTDLL.@)
1213 */
1214 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
1215 SIZE_T *size_ptr, ULONG type, ULONG protect )
1216 {
1217 void *base;
1218 BYTE vprot;
1219 SIZE_T size = *size_ptr;
1220 NTSTATUS status = STATUS_SUCCESS;
1221 struct file_view *view;
1222
1223 TRACE("%p %p %08lx %lx %08lx\n", process, *ret, size, type, protect );
1224
1225 if (!size) return STATUS_INVALID_PARAMETER;
1226
1227 if (!is_current_process( process ))
1228 {
1229 ERR("Unsupported on other process\n");
1230 return STATUS_ACCESS_DENIED;
1231 }
1232
1233 /* Round parameters to a page boundary */
1234
1235 if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
1236
1237 if (*ret)
1238 {
1239 if (type & MEM_RESERVE) /* Round down to 64k boundary */
1240 base = ROUND_ADDR( *ret, granularity_mask );
1241 else
1242 base = ROUND_ADDR( *ret, page_mask );
1243 size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1244
1245 /* disallow low 64k, wrap-around and kernel space */
1246 if (((char *)base <= (char *)granularity_mask) ||
1247 ((char *)base + size < (char *)base) ||
1248 is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
1249 return STATUS_INVALID_PARAMETER;
1250 }
1251 else
1252 {
1253 base = NULL;
1254 size = (size + page_mask) & ~page_mask;
1255 }
1256
1257 if (type & MEM_TOP_DOWN) {
1258 /* FIXME: MEM_TOP_DOWN allocates the largest possible address. */
1259 WARN("MEM_TOP_DOWN ignored\n");
1260 type &= ~MEM_TOP_DOWN;
1261 }
1262
1263 if (zero_bits)
1264 WARN("zero_bits %lu ignored\n", zero_bits);
1265
1266 /* Compute the alloc type flags */
1267
1268 if (!(type & MEM_SYSTEM))
1269 {
1270 if (!(type & (MEM_COMMIT | MEM_RESERVE)) || (type & ~(MEM_COMMIT | MEM_RESERVE)))
1271 {
1272 WARN("called with wrong alloc type flags (%08lx) !\n", type);
1273 return STATUS_INVALID_PARAMETER;
1274 }
1275 }
1276 vprot = VIRTUAL_GetProt( protect );
1277 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
1278
1279 /* Reserve the memory */
1280
1281 RtlEnterCriticalSection( &csVirtual );
1282
1283 if (type & MEM_SYSTEM)
1284 {
1285 if (type & MEM_IMAGE) vprot |= VPROT_IMAGE;
1286 status = create_view( &view, base, size, vprot | VPROT_COMMITTED );
1287 if (status == STATUS_SUCCESS)
1288 {
1289 view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
1290 base = view->base;
1291 }
1292 }
1293 else if ((type & MEM_RESERVE) || !base)
1294 {
1295 status = map_view( &view, base, size, vprot );
1296 if (status == STATUS_SUCCESS)
1297 {
1298 view->flags |= VFLAG_VALLOC;
1299 base = view->base;
1300 }
1301 }
1302 else /* commit the pages */
1303 {
1304 if (!(view = VIRTUAL_FindView( base )) ||
1305 ((char *)base + size > (char *)view->base + view->size)) status = STATUS_NOT_MAPPED_VIEW;
1306 else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1307 }
1308
1309 RtlLeaveCriticalSection( &csVirtual );
1310
1311 if (status == STATUS_SUCCESS)
1312 {
1313 *ret = base;
1314 *size_ptr = size;
1315 }
1316 return status;
1317 }
1318
1319
1320 /***********************************************************************
1321 * NtFreeVirtualMemory (NTDLL.@)
1322 * ZwFreeVirtualMemory (NTDLL.@)
1323 */
1324 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr, ULONG type )
1325 {
1326 FILE_VIEW *view;
1327 char *base;
1328 NTSTATUS status = STATUS_SUCCESS;
1329 LPVOID addr = *addr_ptr;
1330 SIZE_T size = *size_ptr;
1331
1332 TRACE("%p %p %08lx %lx\n", process, addr, size, type );
1333
1334 if (!is_current_process( process ))
1335 {
1336 ERR("Unsupported on other process\n");
1337 return STATUS_ACCESS_DENIED;
1338 }
1339
1340 /* Fix the parameters */
1341
1342 size = ROUND_SIZE( addr, size );
1343 base = ROUND_ADDR( addr, page_mask );
1344
1345 RtlEnterCriticalSection(&csVirtual);
1346
1347 if (!(view = VIRTUAL_FindView( base )) ||
1348 (base + size > (char *)view->base + view->size) ||
1349 !(view->flags & VFLAG_VALLOC))
1350 {
1351 status = STATUS_INVALID_PARAMETER;
1352 }
1353 else if (type & MEM_SYSTEM)
1354 {
1355 /* return the values that the caller should use to unmap the area */
1356 *addr_ptr = view->base;
1357 *size_ptr = view->size;
1358 view->flags |= VFLAG_SYSTEM;
1359 delete_view( view );
1360 }
1361 else if (type == MEM_RELEASE)
1362 {
1363 /* Free the pages */
1364
1365 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
1366 else
1367 {
1368 delete_view( view );
1369 *addr_ptr = base;
1370 *size_ptr = size;
1371 }
1372 }
1373 else if (type == MEM_DECOMMIT)
1374 {
1375 status = decommit_pages( view, base - (char *)view->base, size );
1376 if (status == STATUS_SUCCESS)
1377 {
1378 *addr_ptr = base;
1379 *size_ptr = size;
1380 }
1381 }
1382 else
1383 {
1384 WARN("called with wrong free type flags (%08lx) !\n", type);
1385 status = STATUS_INVALID_PARAMETER;
1386 }
1387
1388 RtlLeaveCriticalSection(&csVirtual);
1389 return status;
1390 }
1391
1392
1393 /***********************************************************************
1394 * NtProtectVirtualMemory (NTDLL.@)
1395 * ZwProtectVirtualMemory (NTDLL.@)
1396 */
1397 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr,
1398 ULONG new_prot, ULONG *old_prot )
1399 {
1400 FILE_VIEW *view;
1401 NTSTATUS status = STATUS_SUCCESS;
1402 char *base;
1403 UINT i;
1404 BYTE vprot, *p;
1405 ULONG prot;
1406 SIZE_T size = *size_ptr;
1407 LPVOID addr = *addr_ptr;
1408
1409 TRACE("%p %p %08lx %08lx\n", process, addr, size, new_prot );
1410
1411 if (!is_current_process( process ))
1412 {
1413 ERR("Unsupported on other process\n");
1414 return STATUS_ACCESS_DENIED;
1415 }
1416
1417 /* Fix the parameters */
1418
1419 size = ROUND_SIZE( addr, size );
1420 base = ROUND_ADDR( addr, page_mask );
1421
1422 RtlEnterCriticalSection( &csVirtual );
1423
1424 if (!(view = VIRTUAL_FindView( base )) || (base + size > (char *)view->base + view->size))
1425 {
1426 status = STATUS_INVALID_PARAMETER;
1427 }
1428 else
1429 {
1430 /* Make sure all the pages are committed */
1431
1432 p = view->prot + ((base - (char *)view->base) >> page_shift);
1433 VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1434 for (i = size >> page_shift; i; i--, p++)
1435 {
1436 if (!(*p & VPROT_COMMITTED))
1437 {
1438 status = STATUS_NOT_COMMITTED;
1439 break;
1440 }
1441 }
1442 if (!i)
1443 {
1444 if (old_prot) *old_prot = prot;
1445 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1446 if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1447 }
1448 }
1449 RtlLeaveCriticalSection( &csVirtual );
1450
1451 if (status == STATUS_SUCCESS)
1452 {
1453 *addr_ptr = base;
1454 *size_ptr = size;
1455 }
1456 return status;
1457 }
1458
1459 #define UNIMPLEMENTED_INFO_CLASS(c) \
1460 case c: \
1461 FIXME("(process=%p,addr=%p) Unimplemented information class: " #c "\n", process, addr); \
1462 return STATUS_INVALID_INFO_CLASS
1463
1464 /***********************************************************************
1465 * NtQueryVirtualMemory (NTDLL.@)
1466 * ZwQueryVirtualMemory (NTDLL.@)
1467 */
1468 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
1469 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
1470 SIZE_T len, SIZE_T *res_len )
1471 {
1472 FILE_VIEW *view;
1473 char *base, *alloc_base = 0;
1474 struct list *ptr;
1475 SIZE_T size = 0;
1476 MEMORY_BASIC_INFORMATION *info = buffer;
1477
1478 if (info_class != MemoryBasicInformation)
1479 {
1480 switch(info_class)
1481 {
1482 UNIMPLEMENTED_INFO_CLASS(MemoryWorkingSetList);
1483 UNIMPLEMENTED_INFO_CLASS(MemorySectionName);
1484 UNIMPLEMENTED_INFO_CLASS(MemoryBasicVlmInformation);
1485
1486 default:
1487 FIXME("(%p,%p,info_class=%d,%p,%ld,%p) Unknown information class\n",
1488 process, addr, info_class, buffer, len, res_len);
1489 return STATUS_INVALID_INFO_CLASS;
1490 }
1491 }
1492 if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
1493 return STATUS_WORKING_SET_LIMIT_RANGE;
1494
1495 if (!is_current_process( process ))
1496 {
1497 ERR("Unsupported on other process\n");
1498 return STATUS_ACCESS_DENIED;
1499 }
1500
1501 base = ROUND_ADDR( addr, page_mask );
1502
1503 /* Find the view containing the address */
1504
1505 RtlEnterCriticalSection(&csVirtual);
1506 ptr = list_head( &views_list );
1507 for (;;)
1508 {
1509 if (!ptr)
1510 {
1511 /* make the address space end at the user limit, except if
1512 * the last view was mapped beyond that */
1513 if (alloc_base <= (char *)user_space_limit)
1514 {
1515 if (user_space_limit && base >= (char *)user_space_limit)
1516 {
1517 RtlLeaveCriticalSection( &csVirtual );
1518 return STATUS_WORKING_SET_LIMIT_RANGE;
1519 }
1520 size = (char *)user_space_limit - alloc_base;
1521 }
1522 else size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1523 view = NULL;
1524 break;
1525 }
1526 view = LIST_ENTRY( ptr, struct file_view, entry );
1527 if ((char *)view->base > base)
1528 {
1529 size = (char *)view->base - alloc_base;
1530 view = NULL;
1531 break;
1532 }
1533 if ((char *)view->base + view->size > base)
1534 {
1535 alloc_base = view->base;
1536 size = view->size;
1537 break;
1538 }
1539 alloc_base = (char *)view->base + view->size;
1540 ptr = list_next( &views_list, ptr );
1541 }
1542
1543 /* Fill the info structure */
1544
1545 if (!view)
1546 {
1547 info->State = MEM_FREE;
1548 info->Protect = 0;
1549 info->AllocationProtect = 0;
1550 info->Type = 0;
1551 }
1552 else
1553 {
1554 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1555 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1556 for (size = base - alloc_base; size < view->size; size += page_mask+1)
1557 if (view->prot[size >> page_shift] != vprot) break;
1558 VIRTUAL_GetWin32Prot( view->protect, &info->AllocationProtect, NULL );
1559 if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
1560 else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
1561 else info->Type = MEM_MAPPED;
1562 }
1563 RtlLeaveCriticalSection(&csVirtual);
1564
1565 info->BaseAddress = (LPVOID)base;
1566 info->AllocationBase = (LPVOID)alloc_base;
1567 info->RegionSize = size - (base - alloc_base);
1568 if (res_len) *res_len = sizeof(*info);
1569 return STATUS_SUCCESS;
1570 }
1571
1572
1573 /***********************************************************************
1574 * NtLockVirtualMemory (NTDLL.@)
1575 * ZwLockVirtualMemory (NTDLL.@)
1576 */
1577 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1578 {
1579 if (!is_current_process( process ))
1580 {
1581 ERR("Unsupported on other process\n");
1582 return STATUS_ACCESS_DENIED;
1583 }
1584 return STATUS_SUCCESS;
1585 }
1586
1587
1588 /***********************************************************************
1589 * NtUnlockVirtualMemory (NTDLL.@)
1590 * ZwUnlockVirtualMemory (NTDLL.@)
1591 */
1592 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1593 {
1594 if (!is_current_process( process ))
1595 {
1596 ERR("Unsupported on other process\n");
1597 return STATUS_ACCESS_DENIED;
1598 }
1599 return STATUS_SUCCESS;
1600 }
1601
1602
1603 /***********************************************************************
1604 * NtCreateSection (NTDLL.@)
1605 * ZwCreateSection (NTDLL.@)
1606 */
1607 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
1608 const LARGE_INTEGER *size, ULONG protect,
1609 ULONG sec_flags, HANDLE file )
1610 {
1611 NTSTATUS ret;
1612 BYTE vprot;
1613 DWORD len = (attr && attr->ObjectName) ? attr->ObjectName->Length : 0;
1614
1615 /* Check parameters */
1616
1617 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1618
1619 vprot = VIRTUAL_GetProt( protect );
1620 if (sec_flags & SEC_RESERVE)
1621 {
1622 if (file) return STATUS_INVALID_PARAMETER;
1623 }
1624 else vprot |= VPROT_COMMITTED;
1625 if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1626 if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
1627
1628 /* Create the server object */
1629
1630 SERVER_START_REQ( create_mapping )
1631 {
1632 req->file_handle = file;
1633 req->size_high = size ? size->u.HighPart : 0;
1634 req->size_low = size ? size->u.LowPart : 0;
1635 req->protect = vprot;
1636 req->access = access;
1637 req->inherit = (attr && (attr->Attributes & OBJ_INHERIT) != 0);
1638 if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
1639 ret = wine_server_call( req );
1640 *handle = reply->handle;
1641 }
1642 SERVER_END_REQ;
1643 return ret;
1644 }
1645
1646
1647 /***********************************************************************
1648 * NtOpenSection (NTDLL.@)
1649 * ZwOpenSection (NTDLL.@)
1650 */
1651 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
1652 {
1653 NTSTATUS ret;
1654 DWORD len = attr->ObjectName->Length;
1655
1656 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1657
1658 SERVER_START_REQ( open_mapping )
1659 {
1660 req->access = access;
1661 req->inherit = (attr->Attributes & OBJ_INHERIT) != 0;
1662 wine_server_add_data( req, attr->ObjectName->Buffer, len );
1663 if (!(ret = wine_server_call( req ))) *handle = reply->handle;
1664 }
1665 SERVER_END_REQ;
1666 return ret;
1667 }
1668
1669
1670 /***********************************************************************
1671 * NtMapViewOfSection (NTDLL.@)
1672 * ZwMapViewOfSection (NTDLL.@)
1673 */
1674 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
1675 SIZE_T commit_size, const LARGE_INTEGER *offset_ptr, SIZE_T *size_ptr,
1676 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
1677 {
1678 FILE_FS_DEVICE_INFORMATION device_info;
1679 NTSTATUS res;
1680 SIZE_T size = 0;
1681 int unix_handle = -1;
1682 int prot;
1683 void *base;
1684 struct file_view *view;
1685 DWORD size_low, size_high, header_size, shared_size;
1686 HANDLE shared_file;
1687 BOOL removable = FALSE;
1688 LARGE_INTEGER offset;
1689
1690 offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
1691
1692 TRACE("handle=%p process=%p addr=%p off=%lx%08lx size=%lx access=%lx\n",
1693 handle, process, *addr_ptr, offset.u.HighPart, offset.u.LowPart, size, protect );
1694
1695 if (!is_current_process( process ))
1696 {
1697 ERR("Unsupported on other process\n");
1698 return STATUS_ACCESS_DENIED;
1699 }
1700
1701 /* Check parameters */
1702
1703 if ((offset.u.LowPart & granularity_mask) ||
1704 (*addr_ptr && ((UINT_PTR)*addr_ptr & granularity_mask)))
1705 return STATUS_INVALID_PARAMETER;
1706
1707 SERVER_START_REQ( get_mapping_info )
1708 {
1709 req->handle = handle;
1710 res = wine_server_call( req );
1711 prot = reply->protect;
1712 base = reply->base;
1713 size_low = reply->size_low;
1714 size_high = reply->size_high;
1715 header_size = reply->header_size;
1716 shared_file = reply->shared_file;
1717 shared_size = reply->shared_size;
1718 }
1719 SERVER_END_REQ;
1720 if (res) return res;
1721
1722 if ((res = wine_server_handle_to_fd( handle, 0, &unix_handle, NULL ))) return res;
1723
1724 if (FILE_GetDeviceInfo( unix_handle, &device_info ) == STATUS_SUCCESS)
1725 removable = device_info.Characteristics & FILE_REMOVABLE_MEDIA;
1726
1727 if (prot & VPROT_IMAGE)
1728 {
1729 if (shared_file)
1730 {
1731 int shared_fd;
1732
1733 if ((res = wine_server_handle_to_fd( shared_file, GENERIC_READ, &shared_fd,
1734 NULL ))) goto done;
1735 res = map_image( handle, unix_handle, base, size_low, header_size,
1736 shared_fd, removable, addr_ptr );
1737 wine_server_release_fd( shared_file, shared_fd );
1738 NtClose( shared_file );
1739 }
1740 else
1741 {
1742 res = map_image( handle, unix_handle, base, size_low, header_size,
1743 -1, removable, addr_ptr );
1744 }
1745 wine_server_release_fd( handle, unix_handle );
1746 if (!res) *size_ptr = size_low;
1747 return res;
1748 }
1749
1750 if (size_high)
1751 ERR("Sizes larger than 4Gb not supported\n");
1752
1753 if ((offset.u.LowPart >= size_low) ||
1754 (*size_ptr > size_low - offset.u.LowPart))
1755 {
1756 res = STATUS_INVALID_PARAMETER;
1757 goto done;
1758 }
1759 if (*size_ptr) size = ROUND_SIZE( offset.u.LowPart, *size_ptr );
1760 else size = size_low - offset.u.LowPart;
1761
1762 switch(protect)
1763 {
1764 case PAGE_NOACCESS:
1765 break;
1766 case PAGE_READWRITE:
1767 case PAGE_EXECUTE_READWRITE:
1768 if (!(prot & VPROT_WRITE))
1769 {
1770 res = STATUS_INVALID_PARAMETER;
1771 goto done;
1772 }
1773 removable = FALSE;
1774 /* fall through */
1775 case PAGE_READONLY:
1776 case PAGE_WRITECOPY:
1777 case PAGE_EXECUTE:
1778 case PAGE_EXECUTE_READ:
1779 case PAGE_EXECUTE_WRITECOPY:
1780 if (prot & VPROT_READ) break;
1781 /* fall through */
1782 default:
1783 res = STATUS_INVALID_PARAMETER;
1784 goto done;
1785 }
1786
1787 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1788 * which has a view of this mapping commits some pages, they will
1789 * appear commited in all other processes, which have the same
1790 * view created. Since we don`t support this yet, we create the
1791 * whole mapping commited.
1792 */
1793 prot |= VPROT_COMMITTED;
1794
1795 /* Reserve a properly aligned area */
1796
1797 RtlEnterCriticalSection( &csVirtual );
1798
1799 res = map_view( &view, *addr_ptr, size, prot );
1800 if (res)
1801 {
1802 RtlLeaveCriticalSection( &csVirtual );
1803 goto done;
1804 }
1805
1806 /* Map the file */
1807
1808 TRACE("handle=%p size=%lx offset=%lx%08lx\n",
1809 handle, size, offset.u.HighPart, offset.u.LowPart );
1810
1811 res = map_file_into_view( view, unix_handle, 0, size, offset.QuadPart, prot, removable );
1812 if (res == STATUS_SUCCESS)
1813 {
1814 if (!removable) /* don't keep handle open on removable media */
1815 NtDuplicateObject( NtCurrentProcess(), handle,
1816 NtCurrentProcess(), &view->mapping,
1817 0, 0, DUPLICATE_SAME_ACCESS );
1818
1819 *addr_ptr = view->base;
1820 *size_ptr = size;
1821 }
1822 else
1823 {
1824 ERR( "map_file_into_view %p %lx %lx%08lx failed\n",
1825 view->base, size, offset.u.HighPart, offset.u.LowPart );
1826 delete_view( view );
1827 }
1828
1829 RtlLeaveCriticalSection( &csVirtual );
1830
1831 done:
1832 wine_server_release_fd( handle, unix_handle );
1833 return res;
1834 }
1835
1836
1837 /***********************************************************************
1838 * NtUnmapViewOfSection (NTDLL.@)
1839 * ZwUnmapViewOfSection (NTDLL.@)
1840 */
1841 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
1842 {
1843 FILE_VIEW *view;
1844 NTSTATUS status = STATUS_INVALID_PARAMETER;
1845 void *base = ROUND_ADDR( addr, page_mask );
1846
1847 if (!is_current_process( process ))
1848 {
1849 ERR("Unsupported on other process\n");
1850 return STATUS_ACCESS_DENIED;
1851 }
1852 RtlEnterCriticalSection( &csVirtual );
1853 if ((view = VIRTUAL_FindView( base )) && (base == view->base))
1854 {
1855 delete_view( view );
1856 status = STATUS_SUCCESS;
1857 }
1858 RtlLeaveCriticalSection( &csVirtual );
1859 return status;
1860 }
1861
1862
1863 /***********************************************************************
1864 * NtFlushVirtualMemory (NTDLL.@)
1865 * ZwFlushVirtualMemory (NTDLL.@)
1866 */
1867 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
1868 SIZE_T *size_ptr, ULONG unknown )
1869 {
1870 FILE_VIEW *view;
1871 NTSTATUS status = STATUS_SUCCESS;
1872 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
1873
1874 if (!is_current_process( process ))
1875 {
1876 ERR("Unsupported on other process\n");
1877 return STATUS_ACCESS_DENIED;
1878 }
1879 RtlEnterCriticalSection( &csVirtual );
1880 if (!(view = VIRTUAL_FindView( addr ))) status = STATUS_INVALID_PARAMETER;
1881 else
1882 {
1883 if (!*size_ptr) *size_ptr = view->size;
1884 *addr_ptr = addr;
1885 if (msync( addr, *size_ptr, MS_SYNC )) status = STATUS_NOT_MAPPED_DATA;
1886 }
1887 RtlLeaveCriticalSection( &csVirtual );
1888 return status;
1889 }
1890
1891
1892 /***********************************************************************
1893 * NtReadVirtualMemory (NTDLL.@)
1894 * ZwReadVirtualMemory (NTDLL.@)
1895 */
1896 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
1897 SIZE_T size, SIZE_T *bytes_read )
1898 {
1899 NTSTATUS status;
1900
1901 SERVER_START_REQ( read_process_memory )
1902 {
1903 req->handle = process;
1904 req->addr = (void *)addr;
1905 wine_server_set_reply( req, buffer, size );
1906 if ((status = wine_server_call( req ))) size = 0;
1907 }
1908 SERVER_END_REQ;
1909 if (bytes_read) *bytes_read = size;
1910 return status;
1911 }
1912
1913
1914 /***********************************************************************
1915 * NtWriteVirtualMemory (NTDLL.@)
1916 * ZwWriteVirtualMemory (NTDLL.@)
1917 */
1918 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
1919 SIZE_T size, SIZE_T *bytes_written )
1920 {
1921 static const unsigned int zero;
1922 SIZE_T first_offset, last_offset, first_mask, last_mask;
1923 NTSTATUS status;
1924
1925 if (!size) return STATUS_INVALID_PARAMETER;
1926
1927 /* compute the mask for the first int */
1928 first_mask = ~0;
1929 first_offset = (ULONG_PTR)addr % sizeof(int);
1930 memset( &first_mask, 0, first_offset );
1931
1932 /* compute the mask for the last int */
1933 last_offset = (size + first_offset) % sizeof(int);
1934 last_mask = 0;
1935 memset( &last_mask, 0xff, last_offset ? last_offset : sizeof(int) );
1936
1937 SERVER_START_REQ( write_process_memory )
1938 {
1939 req->handle = process;
1940 req->addr = (char *)addr - first_offset;
1941 req->first_mask = first_mask;
1942 req->last_mask = last_mask;
1943 if (first_offset) wine_server_add_data( req, &zero, first_offset );
1944 wine_server_add_data( req, buffer, size );
1945 if (last_offset) wine_server_add_data( req, &zero, sizeof(int) - last_offset );
1946
1947 if ((status = wine_server_call( req ))) size = 0;
1948 }
1949 SERVER_END_REQ;
1950 if (bytes_written) *bytes_written = size;
1951 return status;
1952 }
Quick hack tree for wine patches julliard doesn't want to commit