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ntdll: Moved the check for removable file in load_dll to the server.
[wine/dibdrv.git] / dlls / ntdll / virtual.c
blob2ad3cfb561c6760bd4784eb6b109a4e36b34f234
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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_STAT_H
39 # include <sys/stat.h>
40 #endif
41 #ifdef HAVE_SYS_MMAN_H
42 # include <sys/mman.h>
43 #endif
44
45 #define NONAMELESSUNION
46 #define NONAMELESSSTRUCT
47 #include "ntstatus.h"
48 #define WIN32_NO_STATUS
49 #include "windef.h"
50 #include "winternl.h"
51 #include "winioctl.h"
52 #include "wine/library.h"
53 #include "wine/server.h"
54 #include "wine/list.h"
55 #include "wine/debug.h"
56 #include "ntdll_misc.h"
57
58 WINE_DEFAULT_DEBUG_CHANNEL(virtual);
59 WINE_DECLARE_DEBUG_CHANNEL(module);
60
61 #ifndef MS_SYNC
62 #define MS_SYNC 0
63 #endif
64
65 #ifndef MAP_NORESERVE
66 #define MAP_NORESERVE 0
67 #endif
68
69 /* File view */
70 typedef struct file_view
71 {
72 struct list entry; /* Entry in global view list */
73 void *base; /* Base address */
74 size_t size; /* Size in bytes */
75 HANDLE mapping; /* Handle to the file mapping */
76 BYTE flags; /* Allocation flags (VFLAG_*) */
77 BYTE protect; /* Protection for all pages at allocation time */
78 BYTE prot[1]; /* Protection byte for each page */
79 } FILE_VIEW;
80
81 /* Per-view flags */
82 #define VFLAG_SYSTEM 0x01 /* system view (underlying mmap not under our control) */
83 #define VFLAG_VALLOC 0x02 /* allocated by VirtualAlloc */
84
85 /* Conversion from VPROT_* to Win32 flags */
86 static const BYTE VIRTUAL_Win32Flags[16] =
87 {
88 PAGE_NOACCESS, /* 0 */
89 PAGE_READONLY, /* READ */
90 PAGE_READWRITE, /* WRITE */
91 PAGE_READWRITE, /* READ | WRITE */
92 PAGE_EXECUTE, /* EXEC */
93 PAGE_EXECUTE_READ, /* READ | EXEC */
94 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
95 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
96 PAGE_WRITECOPY, /* WRITECOPY */
97 PAGE_WRITECOPY, /* READ | WRITECOPY */
98 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
99 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
100 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
101 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
102 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
103 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
104 };
105
106 static struct list views_list = LIST_INIT(views_list);
107
108 static RTL_CRITICAL_SECTION csVirtual;
109 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
110 {
111 0, 0, &csVirtual,
112 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
113 0, 0, { (DWORD_PTR)(__FILE__ ": csVirtual") }
114 };
115 static RTL_CRITICAL_SECTION csVirtual = { &critsect_debug, -1, 0, 0, 0, 0 };
116
117 #ifdef __i386__
118 /* These are always the same on an i386, and it will be faster this way */
119 # define page_mask 0xfff
120 # define page_shift 12
121 # define page_size 0x1000
122 /* Note: these are Windows limits, you cannot change them. */
123 # define ADDRESS_SPACE_LIMIT ((void *)0xc0000000) /* top of the total available address space */
124 # define USER_SPACE_LIMIT ((void *)0x7fff0000) /* top of the user address space */
125 #else
126 static UINT page_shift;
127 static UINT page_size;
128 static UINT_PTR page_mask;
129 # define ADDRESS_SPACE_LIMIT 0 /* no limit needed on other platforms */
130 # define USER_SPACE_LIMIT 0 /* no limit needed on other platforms */
131 #endif /* __i386__ */
132
133 #define ROUND_ADDR(addr,mask) \
134 ((void *)((UINT_PTR)(addr) & ~(UINT_PTR)(mask)))
135
136 #define ROUND_SIZE(addr,size) \
137 (((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
138
139 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
140 do { if (TRACE_ON(virtual)) VIRTUAL_DumpView(view); } while (0)
141
142 static void *user_space_limit = USER_SPACE_LIMIT;
143 static void *preload_reserve_start;
144 static void *preload_reserve_end;
145 static int use_locks;
146 static int force_exec_prot; /* whether to force PROT_EXEC on all PROT_READ mmaps */
147
148
149 /***********************************************************************
150 * VIRTUAL_GetProtStr
151 */
152 static const char *VIRTUAL_GetProtStr( BYTE prot )
153 {
154 static char buffer[6];
155 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
156 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
157 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
158 buffer[3] = (prot & VPROT_WRITECOPY) ? 'W' : ((prot & VPROT_WRITE) ? 'w' : '-');
159 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
160 buffer[5] = 0;
161 return buffer;
162 }
163
164
165 /***********************************************************************
166 * VIRTUAL_GetUnixProt
167 *
168 * Convert page protections to protection for mmap/mprotect.
169 */
170 static int VIRTUAL_GetUnixProt( BYTE vprot )
171 {
172 int prot = 0;
173 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
174 {
175 if (vprot & VPROT_READ) prot |= PROT_READ;
176 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
177 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
178 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
179 }
180 if (!prot) prot = PROT_NONE;
181 return prot;
182 }
183
184
185 /***********************************************************************
186 * VIRTUAL_DumpView
187 */
188 static void VIRTUAL_DumpView( FILE_VIEW *view )
189 {
190 UINT i, count;
191 char *addr = view->base;
192 BYTE prot = view->prot[0];
193
194 TRACE( "View: %p - %p", addr, addr + view->size - 1 );
195 if (view->flags & VFLAG_SYSTEM)
196 TRACE( " (system)\n" );
197 else if (view->flags & VFLAG_VALLOC)
198 TRACE( " (valloc)\n" );
199 else if (view->mapping)
200 TRACE( " %p\n", view->mapping );
201 else
202 TRACE( " (anonymous)\n");
203
204 for (count = i = 1; i < view->size >> page_shift; i++, count++)
205 {
206 if (view->prot[i] == prot) continue;
207 TRACE( " %p - %p %s\n",
208 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
209 addr += (count << page_shift);
210 prot = view->prot[i];
211 count = 0;
212 }
213 if (count)
214 TRACE( " %p - %p %s\n",
215 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
216 }
217
218
219 /***********************************************************************
220 * VIRTUAL_Dump
221 */
222 #if WINE_VM_DEBUG
223 static void VIRTUAL_Dump(void)
224 {
225 struct file_view *view;
226
227 TRACE( "Dump of all virtual memory views:\n" );
228 RtlEnterCriticalSection(&csVirtual);
229 LIST_FOR_EACH_ENTRY( view, &views_list, FILE_VIEW, entry )
230 {
231 VIRTUAL_DumpView( view );
232 }
233 RtlLeaveCriticalSection(&csVirtual);
234 }
235 #endif
236
237
238 /***********************************************************************
239 * VIRTUAL_FindView
240 *
241 * Find the view containing a given address. The csVirtual section must be held by caller.
242 *
243 * PARAMS
244 * addr [I] Address
245 *
246 * RETURNS
247 * View: Success
248 * NULL: Failure
249 */
250 static struct file_view *VIRTUAL_FindView( const void *addr )
251 {
252 struct file_view *view;
253
254 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
255 {
256 if (view->base > addr) break;
257 if ((const char*)view->base + view->size > (const char*)addr) return view;
258 }
259 return NULL;
260 }
261
262
263 /***********************************************************************
264 * get_mask
265 */
266 static inline UINT_PTR get_mask( ULONG zero_bits )
267 {
268 if (!zero_bits) return 0xffff; /* allocations are aligned to 64K by default */
269 if (zero_bits < page_shift) zero_bits = page_shift;
270 return (1 << zero_bits) - 1;
271 }
272
273
274 /***********************************************************************
275 * find_view_range
276 *
277 * Find the first view overlapping at least part of the specified range.
278 * The csVirtual section must be held by caller.
279 */
280 static struct file_view *find_view_range( const void *addr, size_t size )
281 {
282 struct file_view *view;
283
284 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
285 {
286 if ((const char *)view->base >= (const char *)addr + size) break;
287 if ((const char *)view->base + view->size > (const char *)addr) return view;
288 }
289 return NULL;
290 }
291
292
293 /***********************************************************************
294 * find_free_area
295 *
296 * Find a free area between views inside the specified range.
297 * The csVirtual section must be held by caller.
298 */
299 static void *find_free_area( void *base, void *end, size_t size, size_t mask, int top_down )
300 {
301 struct list *ptr;
302 void *start;
303
304 if (top_down)
305 {
306 start = ROUND_ADDR( (char *)end - size, mask );
307 if (start >= end || start < base) return NULL;
308
309 for (ptr = views_list.prev; ptr != &views_list; ptr = ptr->prev)
310 {
311 struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
312
313 if ((char *)view->base + view->size <= (char *)start) break;
314 if ((char *)view->base >= (char *)start + size) continue;
315 start = ROUND_ADDR( (char *)view->base - size, mask );
316 /* stop if remaining space is not large enough */
317 if (!start || start >= end || start < base) return NULL;
318 }
319 }
320 else
321 {
322 start = ROUND_ADDR( (char *)base + mask, mask );
323 if (start >= end || (char *)end - (char *)start < size) return NULL;
324
325 for (ptr = views_list.next; ptr != &views_list; ptr = ptr->next)
326 {
327 struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
328
329 if ((char *)view->base >= (char *)start + size) break;
330 if ((char *)view->base + view->size <= (char *)start) continue;
331 start = ROUND_ADDR( (char *)view->base + view->size + mask, mask );
332 /* stop if remaining space is not large enough */
333 if (!start || start >= end || (char *)end - (char *)start < size) return NULL;
334 }
335 }
336 return start;
337 }
338
339
340 /***********************************************************************
341 * add_reserved_area
342 *
343 * Add a reserved area to the list maintained by libwine.
344 * The csVirtual section must be held by caller.
345 */
346 static void add_reserved_area( void *addr, size_t size )
347 {
348 TRACE( "adding %p-%p\n", addr, (char *)addr + size );
349
350 if (addr < user_space_limit)
351 {
352 /* unmap the part of the area that is below the limit */
353 assert( (char *)addr + size > (char *)user_space_limit );
354 munmap( addr, (char *)user_space_limit - (char *)addr );
355 size -= (char *)user_space_limit - (char *)addr;
356 addr = user_space_limit;
357 }
358 /* blow away existing mappings */
359 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
360 wine_mmap_add_reserved_area( addr, size );
361 }
362
363
364 /***********************************************************************
365 * is_beyond_limit
366 *
367 * Check if an address range goes beyond a given limit.
368 */
369 static inline int is_beyond_limit( void *addr, size_t size, void *limit )
370 {
371 return (limit && (addr >= limit || (char *)addr + size > (char *)limit));
372 }
373
374
375 /***********************************************************************
376 * unmap_area
377 *
378 * Unmap an area, or simply replace it by an empty mapping if it is
379 * in a reserved area. The csVirtual section must be held by caller.
380 */
381 static inline void unmap_area( void *addr, size_t size )
382 {
383 if (wine_mmap_is_in_reserved_area( addr, size ))
384 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
385 else if (is_beyond_limit( addr, size, user_space_limit ))
386 add_reserved_area( addr, size );
387 else
388 munmap( addr, size );
389 }
390
391
392 /***********************************************************************
393 * delete_view
394 *
395 * Deletes a view. The csVirtual section must be held by caller.
396 */
397 static void delete_view( struct file_view *view ) /* [in] View */
398 {
399 if (!(view->flags & VFLAG_SYSTEM)) unmap_area( view->base, view->size );
400 list_remove( &view->entry );
401 if (view->mapping) NtClose( view->mapping );
402 free( view );
403 }
404
405
406 /***********************************************************************
407 * create_view
408 *
409 * Create a view. The csVirtual section must be held by caller.
410 */
411 static NTSTATUS create_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
412 {
413 struct file_view *view;
414 struct list *ptr;
415 int unix_prot = VIRTUAL_GetUnixProt( vprot );
416
417 assert( !((UINT_PTR)base & page_mask) );
418 assert( !(size & page_mask) );
419
420 /* Create the view structure */
421
422 if (!(view = malloc( sizeof(*view) + (size >> page_shift) - 1 ))) return STATUS_NO_MEMORY;
423
424 view->base = base;
425 view->size = size;
426 view->flags = 0;
427 view->mapping = 0;
428 view->protect = vprot;
429 memset( view->prot, vprot & ~VPROT_IMAGE, size >> page_shift );
430
431 /* Insert it in the linked list */
432
433 LIST_FOR_EACH( ptr, &views_list )
434 {
435 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
436 if (next->base > base) break;
437 }
438 list_add_before( ptr, &view->entry );
439
440 /* Check for overlapping views. This can happen if the previous view
441 * was a system view that got unmapped behind our back. In that case
442 * we recover by simply deleting it. */
443
444 if ((ptr = list_prev( &views_list, &view->entry )) != NULL)
445 {
446 struct file_view *prev = LIST_ENTRY( ptr, struct file_view, entry );
447 if ((char *)prev->base + prev->size > (char *)base)
448 {
449 TRACE( "overlapping prev view %p-%p for %p-%p\n",
450 prev->base, (char *)prev->base + prev->size,
451 base, (char *)base + view->size );
452 assert( prev->flags & VFLAG_SYSTEM );
453 delete_view( prev );
454 }
455 }
456 if ((ptr = list_next( &views_list, &view->entry )) != NULL)
457 {
458 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
459 if ((char *)base + view->size > (char *)next->base)
460 {
461 TRACE( "overlapping next view %p-%p for %p-%p\n",
462 next->base, (char *)next->base + next->size,
463 base, (char *)base + view->size );
464 assert( next->flags & VFLAG_SYSTEM );
465 delete_view( next );
466 }
467 }
468
469 *view_ret = view;
470 VIRTUAL_DEBUG_DUMP_VIEW( view );
471
472 if (force_exec_prot && (unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
473 {
474 TRACE( "forcing exec permission on %p-%p\n", base, (char *)base + size - 1 );
475 mprotect( base, size, unix_prot | PROT_EXEC );
476 }
477 return STATUS_SUCCESS;
478 }
479
480
481 /***********************************************************************
482 * VIRTUAL_GetWin32Prot
483 *
484 * Convert page protections to Win32 flags.
485 */
486 static DWORD VIRTUAL_GetWin32Prot( BYTE vprot )
487 {
488 DWORD ret = VIRTUAL_Win32Flags[vprot & 0x0f];
489 if (vprot & VPROT_NOCACHE) ret |= PAGE_NOCACHE;
490 if (vprot & VPROT_GUARD) ret |= PAGE_GUARD;
491 return ret;
492 }
493
494
495 /***********************************************************************
496 * VIRTUAL_GetProt
497 *
498 * Build page protections from Win32 flags.
499 *
500 * PARAMS
501 * protect [I] Win32 protection flags
502 *
503 * RETURNS
504 * Value of page protection flags
505 */
506 static BYTE VIRTUAL_GetProt( DWORD protect )
507 {
508 BYTE vprot;
509
510 switch(protect & 0xff)
511 {
512 case PAGE_READONLY:
513 vprot = VPROT_READ;
514 break;
515 case PAGE_READWRITE:
516 vprot = VPROT_READ | VPROT_WRITE;
517 break;
518 case PAGE_WRITECOPY:
519 /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
520 * that the hFile must have been opened with GENERIC_READ and
521 * GENERIC_WRITE access. This is WRONG as tests show that you
522 * only need GENERIC_READ access (at least for Win9x,
523 * FIXME: what about NT?). Thus, we don't put VPROT_WRITE in
524 * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
525 */
526 vprot = VPROT_READ | VPROT_WRITECOPY;
527 break;
528 case PAGE_EXECUTE:
529 vprot = VPROT_EXEC;
530 break;
531 case PAGE_EXECUTE_READ:
532 vprot = VPROT_EXEC | VPROT_READ;
533 break;
534 case PAGE_EXECUTE_READWRITE:
535 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
536 break;
537 case PAGE_EXECUTE_WRITECOPY:
538 /* See comment for PAGE_WRITECOPY above */
539 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
540 break;
541 case PAGE_NOACCESS:
542 default:
543 vprot = 0;
544 break;
545 }
546 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
547 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
548 return vprot;
549 }
550
551
552 /***********************************************************************
553 * VIRTUAL_SetProt
554 *
555 * Change the protection of a range of pages.
556 *
557 * RETURNS
558 * TRUE: Success
559 * FALSE: Failure
560 */
561 static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
562 void *base, /* [in] Starting address */
563 size_t size, /* [in] Size in bytes */
564 BYTE vprot ) /* [in] Protections to use */
565 {
566 int unix_prot = VIRTUAL_GetUnixProt(vprot);
567
568 TRACE("%p-%p %s\n",
569 base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
570
571 if (force_exec_prot && (unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
572 {
573 TRACE( "forcing exec permission on %p-%p\n", base, (char *)base + size - 1 );
574 if (!mprotect( base, size, unix_prot | PROT_EXEC )) goto done;
575 /* exec + write may legitimately fail, in that case fall back to write only */
576 if (!(unix_prot & PROT_WRITE)) return FALSE;
577 }
578
579 if (mprotect( base, size, unix_prot )) return FALSE; /* FIXME: last error */
580
581 done:
582 memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
583 vprot, size >> page_shift );
584 VIRTUAL_DEBUG_DUMP_VIEW( view );
585 return TRUE;
586 }
587
588
589 /***********************************************************************
590 * unmap_extra_space
591 *
592 * Release the extra memory while keeping the range starting on the granularity boundary.
593 */
594 static inline void *unmap_extra_space( void *ptr, size_t total_size, size_t wanted_size, size_t mask )
595 {
596 if ((ULONG_PTR)ptr & mask)
597 {
598 size_t extra = mask + 1 - ((ULONG_PTR)ptr & mask);
599 munmap( ptr, extra );
600 ptr = (char *)ptr + extra;
601 total_size -= extra;
602 }
603 if (total_size > wanted_size)
604 munmap( (char *)ptr + wanted_size, total_size - wanted_size );
605 return ptr;
606 }
607
608
609 struct alloc_area
610 {
611 size_t size;
612 size_t mask;
613 int top_down;
614 void *result;
615 };
616
617 /***********************************************************************
618 * alloc_reserved_area_callback
619 *
620 * Try to map some space inside a reserved area. Callback for wine_mmap_enum_reserved_areas.
621 */
622 static int alloc_reserved_area_callback( void *start, size_t size, void *arg )
623 {
624 static void * const address_space_start = (void *)0x110000;
625 struct alloc_area *alloc = arg;
626 void *end = (char *)start + size;
627
628 if (start < address_space_start) start = address_space_start;
629 if (user_space_limit && end > user_space_limit) end = user_space_limit;
630 if (start >= end) return 0;
631
632 /* make sure we don't touch the preloader reserved range */
633 if (preload_reserve_end >= start)
634 {
635 if (preload_reserve_end >= end)
636 {
637 if (preload_reserve_start <= start) return 0; /* no space in that area */
638 if (preload_reserve_start < end) end = preload_reserve_start;
639 }
640 else if (preload_reserve_start <= start) start = preload_reserve_end;
641 else
642 {
643 /* range is split in two by the preloader reservation, try first part */
644 if ((alloc->result = find_free_area( start, preload_reserve_start, alloc->size,
645 alloc->mask, alloc->top_down )))
646 return 1;
647 /* then fall through to try second part */
648 start = preload_reserve_end;
649 }
650 }
651 if ((alloc->result = find_free_area( start, end, alloc->size, alloc->mask, alloc->top_down )))
652 return 1;
653
654 return 0;
655 }
656
657
658 /***********************************************************************
659 * map_view
660 *
661 * Create a view and mmap the corresponding memory area.
662 * The csVirtual section must be held by caller.
663 */
664 static NTSTATUS map_view( struct file_view **view_ret, void *base, size_t size, size_t mask,
665 int top_down, BYTE vprot )
666 {
667 void *ptr;
668 NTSTATUS status;
669
670 if (base)
671 {
672 if (is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
673 return STATUS_WORKING_SET_LIMIT_RANGE;
674
675 switch (wine_mmap_is_in_reserved_area( base, size ))
676 {
677 case -1: /* partially in a reserved area */
678 return STATUS_CONFLICTING_ADDRESSES;
679
680 case 0: /* not in a reserved area, do a normal allocation */
681 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
682 {
683 if (errno == ENOMEM) return STATUS_NO_MEMORY;
684 return STATUS_INVALID_PARAMETER;
685 }
686 if (ptr != base)
687 {
688 /* We couldn't get the address we wanted */
689 if (is_beyond_limit( ptr, size, user_space_limit )) add_reserved_area( ptr, size );
690 else munmap( ptr, size );
691 return STATUS_CONFLICTING_ADDRESSES;
692 }
693 break;
694
695 default:
696 case 1: /* in a reserved area, make sure the address is available */
697 if (find_view_range( base, size )) return STATUS_CONFLICTING_ADDRESSES;
698 /* replace the reserved area by our mapping */
699 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED )) != base)
700 return STATUS_INVALID_PARAMETER;
701 break;
702 }
703 }
704 else
705 {
706 size_t view_size = size + mask + 1;
707 struct alloc_area alloc;
708
709 alloc.size = size;
710 alloc.mask = mask;
711 alloc.top_down = top_down;
712 if (wine_mmap_enum_reserved_areas( alloc_reserved_area_callback, &alloc, top_down ))
713 {
714 ptr = alloc.result;
715 TRACE( "got mem in reserved area %p-%p\n", ptr, (char *)ptr + size );
716 if (wine_anon_mmap( ptr, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED ) != ptr)
717 return STATUS_INVALID_PARAMETER;
718 goto done;
719 }
720
721 for (;;)
722 {
723 if ((ptr = wine_anon_mmap( NULL, view_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
724 {
725 if (errno == ENOMEM) return STATUS_NO_MEMORY;
726 return STATUS_INVALID_PARAMETER;
727 }
728 TRACE( "got mem with anon mmap %p-%p\n", ptr, (char *)ptr + size );
729 /* if we got something beyond the user limit, unmap it and retry */
730 if (is_beyond_limit( ptr, view_size, user_space_limit )) add_reserved_area( ptr, view_size );
731 else break;
732 }
733 ptr = unmap_extra_space( ptr, view_size, size, mask );
734 }
735 done:
736 status = create_view( view_ret, ptr, size, vprot );
737 if (status != STATUS_SUCCESS) unmap_area( ptr, size );
738 return status;
739 }
740
741
742 /***********************************************************************
743 * unaligned_mmap
744 *
745 * Linux kernels before 2.4.x can support non page-aligned offsets, as
746 * long as the offset is aligned to the filesystem block size. This is
747 * a big performance gain so we want to take advantage of it.
748 *
749 * However, when we use 64-bit file support this doesn't work because
750 * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
751 * in that it rounds unaligned offsets down to a page boundary. For
752 * these reasons we do a direct system call here.
753 */
754 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
755 unsigned int flags, int fd, off_t offset )
756 {
757 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
758 if (!(offset >> 32) && (offset & page_mask))
759 {
760 int ret;
761
762 struct
763 {
764 void *addr;
765 unsigned int length;
766 unsigned int prot;
767 unsigned int flags;
768 unsigned int fd;
769 unsigned int offset;
770 } args;
771
772 args.addr = addr;
773 args.length = length;
774 args.prot = prot;
775 args.flags = flags;
776 args.fd = fd;
777 args.offset = offset;
778
779 __asm__ __volatile__("push %%ebx\n\t"
780 "movl %2,%%ebx\n\t"
781 "int $0x80\n\t"
782 "popl %%ebx"
783 : "=a" (ret)
784 : "0" (90), /* SYS_mmap */
785 "q" (&args)
786 : "memory" );
787 if (ret < 0 && ret > -4096)
788 {
789 errno = -ret;
790 ret = -1;
791 }
792 return (void *)ret;
793 }
794 #endif
795 return mmap( addr, length, prot, flags, fd, offset );
796 }
797
798
799 /***********************************************************************
800 * map_file_into_view
801 *
802 * Wrapper for mmap() to map a file into a view, falling back to read if mmap fails.
803 * The csVirtual section must be held by caller.
804 */
805 static NTSTATUS map_file_into_view( struct file_view *view, int fd, size_t start, size_t size,
806 off_t offset, BYTE vprot, BOOL removable )
807 {
808 void *ptr;
809 int prot = VIRTUAL_GetUnixProt( vprot );
810 BOOL shared_write = (vprot & VPROT_WRITE) != 0;
811
812 assert( start < view->size );
813 assert( start + size <= view->size );
814
815 /* only try mmap if media is not removable (or if we require write access) */
816 if (!removable || shared_write)
817 {
818 int flags = MAP_FIXED | (shared_write ? MAP_SHARED : MAP_PRIVATE);
819
820 if (unaligned_mmap( (char *)view->base + start, size, prot, flags, fd, offset ) != (void *)-1)
821 goto done;
822
823 /* mmap() failed; if this is because the file offset is not */
824 /* page-aligned (EINVAL), or because the underlying filesystem */
825 /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
826 if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return FILE_GetNtStatus();
827 if (shared_write) return FILE_GetNtStatus(); /* we cannot fake shared write mappings */
828 }
829
830 /* Reserve the memory with an anonymous mmap */
831 ptr = wine_anon_mmap( (char *)view->base + start, size, PROT_READ | PROT_WRITE, MAP_FIXED );
832 if (ptr == (void *)-1) return FILE_GetNtStatus();
833 /* Now read in the file */
834 pread( fd, ptr, size, offset );
835 if (prot != (PROT_READ|PROT_WRITE)) mprotect( ptr, size, prot ); /* Set the right protection */
836 done:
837 memset( view->prot + (start >> page_shift), vprot, ROUND_SIZE(start,size) >> page_shift );
838 return STATUS_SUCCESS;
839 }
840
841
842 /***********************************************************************
843 * decommit_view
844 *
845 * Decommit some pages of a given view.
846 * The csVirtual section must be held by caller.
847 */
848 static NTSTATUS decommit_pages( struct file_view *view, size_t start, size_t size )
849 {
850 if (wine_anon_mmap( (char *)view->base + start, size, PROT_NONE, MAP_FIXED ) != (void *)-1)
851 {
852 BYTE *p = view->prot + (start >> page_shift);
853 size >>= page_shift;
854 while (size--) *p++ &= ~VPROT_COMMITTED;
855 return STATUS_SUCCESS;
856 }
857 return FILE_GetNtStatus();
858 }
859
860
861 /***********************************************************************
862 * do_relocations
863 *
864 * Apply the relocations to a mapped PE image
865 */
866 static int do_relocations( char *base, const IMAGE_DATA_DIRECTORY *dir,
867 int delta, SIZE_T total_size )
868 {
869 IMAGE_BASE_RELOCATION *rel;
870
871 TRACE_(module)( "relocating from %p-%p to %p-%p\n",
872 base - delta, base - delta + total_size, base, base + total_size );
873
874 for (rel = (IMAGE_BASE_RELOCATION *)(base + dir->VirtualAddress);
875 ((char *)rel < base + dir->VirtualAddress + dir->Size) && rel->SizeOfBlock;
876 rel = (IMAGE_BASE_RELOCATION*)((char*)rel + rel->SizeOfBlock) )
877 {
878 char *page = base + rel->VirtualAddress;
879 WORD *TypeOffset = (WORD *)(rel + 1);
880 int i, count = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(*TypeOffset);
881
882 if (!count) continue;
883
884 /* sanity checks */
885 if ((char *)rel + rel->SizeOfBlock > base + dir->VirtualAddress + dir->Size)
886 {
887 ERR_(module)("invalid relocation %p,%x,%d at %p,%x,%x\n",
888 rel, rel->VirtualAddress, rel->SizeOfBlock,
889 base, dir->VirtualAddress, dir->Size );
890 return 0;
891 }
892
893 if (page > base + total_size)
894 {
895 WARN_(module)("skipping %d relocations for page %p beyond module %p-%p\n",
896 count, page, base, base + total_size );
897 continue;
898 }
899
900 TRACE_(module)("%d relocations for page %x\n", count, rel->VirtualAddress);
901
902 /* patching in reverse order */
903 for (i = 0 ; i < count; i++)
904 {
905 int offset = TypeOffset[i] & 0xFFF;
906 int type = TypeOffset[i] >> 12;
907 switch(type)
908 {
909 case IMAGE_REL_BASED_ABSOLUTE:
910 break;
911 case IMAGE_REL_BASED_HIGH:
912 *(short*)(page+offset) += HIWORD(delta);
913 break;
914 case IMAGE_REL_BASED_LOW:
915 *(short*)(page+offset) += LOWORD(delta);
916 break;
917 case IMAGE_REL_BASED_HIGHLOW:
918 *(int*)(page+offset) += delta;
919 /* FIXME: if this is an exported address, fire up enhanced logic */
920 break;
921 default:
922 FIXME_(module)("Unknown/unsupported fixup type %d.\n", type);
923 break;
924 }
925 }
926 }
927 return 1;
928 }
929
930
931 /***********************************************************************
932 * map_image
933 *
934 * Map an executable (PE format) image into memory.
935 */
936 static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, SIZE_T total_size, SIZE_T mask,
937 SIZE_T header_size, int shared_fd, BOOL removable, PVOID *addr_ptr )
938 {
939 IMAGE_DOS_HEADER *dos;
940 IMAGE_NT_HEADERS *nt;
941 IMAGE_SECTION_HEADER *sec;
942 IMAGE_DATA_DIRECTORY *imports;
943 NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
944 int i;
945 off_t pos;
946 struct stat st;
947 struct file_view *view = NULL;
948 char *ptr, *header_end;
949
950 /* zero-map the whole range */
951
952 RtlEnterCriticalSection( &csVirtual );
953
954 if (base >= (char *)0x110000) /* make sure the DOS area remains free */
955 status = map_view( &view, base, total_size, mask, FALSE,
956 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
957
958 if (status == STATUS_CONFLICTING_ADDRESSES)
959 status = map_view( &view, NULL, total_size, mask, FALSE,
960 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
961
962 if (status != STATUS_SUCCESS) goto error;
963
964 ptr = view->base;
965 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
966
967 /* map the header */
968
969 if (fstat( fd, &st ) == -1)
970 {
971 status = FILE_GetNtStatus();
972 goto error;
973 }
974 status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
975 if (!st.st_size) goto error;
976 header_size = min( header_size, st.st_size );
977 if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
978 removable ) != STATUS_SUCCESS) goto error;
979 dos = (IMAGE_DOS_HEADER *)ptr;
980 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
981 header_end = ptr + ROUND_SIZE( 0, header_size );
982 memset( ptr + header_size, 0, header_end - (ptr + header_size) );
983 if ((char *)(nt + 1) > header_end) goto error;
984 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
985 if ((char *)(sec + nt->FileHeader.NumberOfSections) > header_end) goto error;
986
987 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
988 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
989
990 /* check the architecture */
991
992 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
993 {
994 MESSAGE("Trying to load PE image for unsupported architecture (");
995 switch (nt->FileHeader.Machine)
996 {
997 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
998 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
999 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
1000 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
1001 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
1002 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
1003 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
1004 case IMAGE_FILE_MACHINE_IA64: MESSAGE("IA-64"); break;
1005 case IMAGE_FILE_MACHINE_ALPHA64: MESSAGE("Alpha-64"); break;
1006 case IMAGE_FILE_MACHINE_AMD64: MESSAGE("AMD-64"); break;
1007 case IMAGE_FILE_MACHINE_ARM: MESSAGE("ARM"); break;
1008 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
1009 }
1010 MESSAGE(")\n");
1011 goto error;
1012 }
1013
1014 /* check for non page-aligned binary */
1015
1016 if (nt->OptionalHeader.SectionAlignment <= page_mask)
1017 {
1018 /* unaligned sections, this happens for native subsystem binaries */
1019 /* in that case Windows simply maps in the whole file */
1020
1021 if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ,
1022 removable ) != STATUS_SUCCESS) goto error;
1023
1024 /* check that all sections are loaded at the right offset */
1025 if (nt->OptionalHeader.FileAlignment != nt->OptionalHeader.SectionAlignment) goto error;
1026 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
1027 {
1028 if (sec[i].VirtualAddress != sec[i].PointerToRawData)
1029 goto error; /* Windows refuses to load in that case too */
1030 }
1031
1032 /* set the image protections */
1033 VIRTUAL_SetProt( view, ptr, total_size,
1034 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
1035
1036 /* perform relocations if necessary */
1037 /* FIXME: not 100% compatible, Windows doesn't do this for non page-aligned binaries */
1038 if (ptr != base)
1039 {
1040 const IMAGE_DATA_DIRECTORY *relocs;
1041 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1042 if (relocs->VirtualAddress && relocs->Size)
1043 do_relocations( ptr, relocs, ptr - base, total_size );
1044 }
1045
1046 goto done;
1047 }
1048
1049
1050 /* map all the sections */
1051
1052 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1053 {
1054 static const SIZE_T sector_align = 0x1ff;
1055 SIZE_T map_size, file_start, file_size, end;
1056
1057 if (!sec->Misc.VirtualSize)
1058 map_size = ROUND_SIZE( 0, sec->SizeOfRawData );
1059 else
1060 map_size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
1061
1062 /* file positions are rounded to sector boundaries regardless of OptionalHeader.FileAlignment */
1063 file_start = sec->PointerToRawData & ~sector_align;
1064 file_size = (sec->SizeOfRawData + (sec->PointerToRawData & sector_align) + sector_align) & ~sector_align;
1065 if (file_size > map_size) file_size = map_size;
1066
1067 /* a few sanity checks */
1068 end = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, map_size );
1069 if (sec->VirtualAddress > total_size || end > total_size || end < sec->VirtualAddress)
1070 {
1071 WARN_(module)( "Section %.8s too large (%x+%lx/%lx)\n",
1072 sec->Name, sec->VirtualAddress, map_size, total_size );
1073 goto error;
1074 }
1075
1076 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
1077 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
1078 {
1079 TRACE_(module)( "mapping shared section %.8s at %p off %x (%x) size %lx (%lx) flags %x\n",
1080 sec->Name, ptr + sec->VirtualAddress,
1081 sec->PointerToRawData, (int)pos, file_size, map_size,
1082 sec->Characteristics );
1083 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, map_size, pos,
1084 VPROT_COMMITTED | VPROT_READ | VPROT_WRITE,
1085 FALSE ) != STATUS_SUCCESS)
1086 {
1087 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
1088 goto error;
1089 }
1090
1091 /* check if the import directory falls inside this section */
1092 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
1093 imports->VirtualAddress < sec->VirtualAddress + map_size)
1094 {
1095 UINT_PTR base = imports->VirtualAddress & ~page_mask;
1096 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
1097 if (end > sec->VirtualAddress + map_size) end = sec->VirtualAddress + map_size;
1098 if (end > base)
1099 map_file_into_view( view, shared_fd, base, end - base,
1100 pos + (base - sec->VirtualAddress),
1101 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1102 FALSE );
1103 }
1104 pos += map_size;
1105 continue;
1106 }
1107
1108 TRACE_(module)( "mapping section %.8s at %p off %x size %x virt %x flags %x\n",
1109 sec->Name, ptr + sec->VirtualAddress,
1110 sec->PointerToRawData, sec->SizeOfRawData,
1111 sec->Misc.VirtualSize, sec->Characteristics );
1112
1113 if (!sec->PointerToRawData || !file_size) continue;
1114
1115 /* Note: if the section is not aligned properly map_file_into_view will magically
1116 * fall back to read(), so we don't need to check anything here.
1117 */
1118 end = file_start + file_size;
1119 if (sec->PointerToRawData >= st.st_size ||
1120 end > ((st.st_size + sector_align) & ~sector_align) ||
1121 end < file_start ||
1122 map_file_into_view( view, fd, sec->VirtualAddress, file_size, file_start,
1123 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1124 removable ) != STATUS_SUCCESS)
1125 {
1126 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
1127 goto error;
1128 }
1129
1130 if (file_size & page_mask)
1131 {
1132 end = ROUND_SIZE( 0, file_size );
1133 if (end > map_size) end = map_size;
1134 TRACE_(module)("clearing %p - %p\n",
1135 ptr + sec->VirtualAddress + file_size,
1136 ptr + sec->VirtualAddress + end );
1137 memset( ptr + sec->VirtualAddress + file_size, 0, end - file_size );
1138 }
1139 }
1140
1141
1142 /* perform base relocation, if necessary */
1143
1144 if (ptr != base)
1145 {
1146 const IMAGE_DATA_DIRECTORY *relocs;
1147
1148 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1149 if (nt->FileHeader.Characteristics & IMAGE_FILE_RELOCS_STRIPPED)
1150 {
1151 WARN( "Need to relocate module from addr %x, but there are no relocation records\n",
1152 nt->OptionalHeader.ImageBase );
1153 status = STATUS_CONFLICTING_ADDRESSES;
1154 goto error;
1155 }
1156
1157 /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
1158 * really make sure that the *new* base address is also > 2GB.
1159 * Some DLLs really check the MSB of the module handle :-/
1160 */
1161 if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((ULONG_PTR)base & 0x80000000))
1162 ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
1163
1164 if (!do_relocations( ptr, relocs, ptr - base, total_size ))
1165 {
1166 goto error;
1167 }
1168 }
1169
1170 /* set the image protections */
1171
1172 VIRTUAL_SetProt( view, ptr, ROUND_SIZE( 0, header_size ), VPROT_COMMITTED | VPROT_READ );
1173
1174 sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
1175 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1176 {
1177 SIZE_T size;
1178 BYTE vprot = VPROT_COMMITTED;
1179
1180 if (sec->Misc.VirtualSize)
1181 size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
1182 else
1183 size = ROUND_SIZE( sec->VirtualAddress, sec->SizeOfRawData );
1184
1185 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
1186 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_READ|VPROT_WRITECOPY;
1187 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
1188
1189 /* Dumb game crack lets the AOEP point into a data section. Adjust. */
1190 if ((nt->OptionalHeader.AddressOfEntryPoint >= sec->VirtualAddress) &&
1191 (nt->OptionalHeader.AddressOfEntryPoint < sec->VirtualAddress + size))
1192 vprot |= VPROT_EXEC;
1193
1194 VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
1195 }
1196
1197 done:
1198 if (!removable) /* don't keep handle open on removable media */
1199 NtDuplicateObject( NtCurrentProcess(), hmapping,
1200 NtCurrentProcess(), &view->mapping,
1201 0, 0, DUPLICATE_SAME_ACCESS );
1202
1203 RtlLeaveCriticalSection( &csVirtual );
1204
1205 *addr_ptr = ptr;
1206 return STATUS_SUCCESS;
1207
1208 error:
1209 if (view) delete_view( view );
1210 RtlLeaveCriticalSection( &csVirtual );
1211 return status;
1212 }
1213
1214
1215 /***********************************************************************
1216 * is_current_process
1217 *
1218 * Check whether a process handle is for the current process.
1219 */
1220 BOOL is_current_process( HANDLE handle )
1221 {
1222 BOOL ret = FALSE;
1223
1224 if (handle == NtCurrentProcess()) return TRUE;
1225 SERVER_START_REQ( get_process_info )
1226 {
1227 req->handle = handle;
1228 if (!wine_server_call( req ))
1229 ret = ((DWORD)reply->pid == GetCurrentProcessId());
1230 }
1231 SERVER_END_REQ;
1232 return ret;
1233 }
1234
1235
1236 /***********************************************************************
1237 * virtual_init
1238 */
1239 void virtual_init(void)
1240 {
1241 const char *preload;
1242 #ifndef page_mask
1243 page_size = getpagesize();
1244 page_mask = page_size - 1;
1245 /* Make sure we have a power of 2 */
1246 assert( !(page_size & page_mask) );
1247 page_shift = 0;
1248 while ((1 << page_shift) != page_size) page_shift++;
1249 #endif /* page_mask */
1250 if ((preload = getenv("WINEPRELOADRESERVE")))
1251 {
1252 unsigned long start, end;
1253 if (sscanf( preload, "%lx-%lx", &start, &end ) == 2)
1254 {
1255 preload_reserve_start = (void *)start;
1256 preload_reserve_end = (void *)end;
1257 }
1258 }
1259 }
1260
1261
1262 /***********************************************************************
1263 * virtual_init_threading
1264 */
1265 void virtual_init_threading(void)
1266 {
1267 use_locks = 1;
1268 }
1269
1270
1271 /***********************************************************************
1272 * VIRTUAL_HandleFault
1273 */
1274 NTSTATUS VIRTUAL_HandleFault( LPCVOID addr )
1275 {
1276 FILE_VIEW *view;
1277 NTSTATUS ret = STATUS_ACCESS_VIOLATION;
1278
1279 RtlEnterCriticalSection( &csVirtual );
1280 if ((view = VIRTUAL_FindView( addr )))
1281 {
1282 void *page = ROUND_ADDR( addr, page_mask );
1283 BYTE vprot = view->prot[((const char *)page - (const char *)view->base) >> page_shift];
1284 if (vprot & VPROT_GUARD)
1285 {
1286 VIRTUAL_SetProt( view, page, page_size, vprot & ~VPROT_GUARD );
1287 ret = STATUS_GUARD_PAGE_VIOLATION;
1288 }
1289 }
1290 RtlLeaveCriticalSection( &csVirtual );
1291 return ret;
1292 }
1293
1294
1295 /***********************************************************************
1296 * VIRTUAL_SetForceExec
1297 *
1298 * Whether to force exec prot on all views.
1299 */
1300 void VIRTUAL_SetForceExec( BOOL enable )
1301 {
1302 struct file_view *view;
1303
1304 RtlEnterCriticalSection( &csVirtual );
1305 if (!force_exec_prot != !enable) /* change all existing views */
1306 {
1307 force_exec_prot = enable;
1308
1309 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
1310 {
1311 UINT i, count;
1312 int unix_prot;
1313 char *addr = view->base;
1314 BYTE prot = view->prot[0];
1315
1316 for (count = i = 1; i < view->size >> page_shift; i++, count++)
1317 {
1318 if (view->prot[i] == prot) continue;
1319 unix_prot = VIRTUAL_GetUnixProt( prot );
1320 if ((unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
1321 {
1322 TRACE( "%s exec prot for %p-%p\n",
1323 force_exec_prot ? "enabling" : "disabling",
1324 addr, addr + (count << page_shift) - 1 );
1325 mprotect( addr, count << page_shift,
1326 unix_prot | (force_exec_prot ? PROT_EXEC : 0) );
1327 }
1328 addr += (count << page_shift);
1329 prot = view->prot[i];
1330 count = 0;
1331 }
1332 if (count)
1333 {
1334 unix_prot = VIRTUAL_GetUnixProt( prot );
1335 if ((unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
1336 {
1337 TRACE( "%s exec prot for %p-%p\n",
1338 force_exec_prot ? "enabling" : "disabling",
1339 addr, addr + (count << page_shift) - 1 );
1340 mprotect( addr, count << page_shift,
1341 unix_prot | (force_exec_prot ? PROT_EXEC : 0) );
1342 }
1343 }
1344 }
1345 }
1346 RtlLeaveCriticalSection( &csVirtual );
1347 }
1348
1349
1350 /***********************************************************************
1351 * VIRTUAL_UseLargeAddressSpace
1352 *
1353 * Increase the address space size for apps that support it.
1354 */
1355 void VIRTUAL_UseLargeAddressSpace(void)
1356 {
1357 /* no large address space on win9x */
1358 if (NtCurrentTeb()->Peb->OSPlatformId != VER_PLATFORM_WIN32_NT) return;
1359 user_space_limit = ADDRESS_SPACE_LIMIT;
1360 }
1361
1362
1363 /***********************************************************************
1364 * NtAllocateVirtualMemory (NTDLL.@)
1365 * ZwAllocateVirtualMemory (NTDLL.@)
1366 */
1367 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
1368 SIZE_T *size_ptr, ULONG type, ULONG protect )
1369 {
1370 void *base;
1371 BYTE vprot;
1372 SIZE_T size = *size_ptr;
1373 SIZE_T mask = get_mask( zero_bits );
1374 NTSTATUS status = STATUS_SUCCESS;
1375 struct file_view *view;
1376
1377 TRACE("%p %p %08lx %x %08x\n", process, *ret, size, type, protect );
1378
1379 if (!size) return STATUS_INVALID_PARAMETER;
1380
1381 if (!is_current_process( process ))
1382 {
1383 ERR("Unsupported on other process\n");
1384 return STATUS_ACCESS_DENIED;
1385 }
1386
1387 /* Round parameters to a page boundary */
1388
1389 if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
1390
1391 if (*ret)
1392 {
1393 if (type & MEM_RESERVE) /* Round down to 64k boundary */
1394 base = ROUND_ADDR( *ret, mask );
1395 else
1396 base = ROUND_ADDR( *ret, page_mask );
1397 size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1398
1399 /* disallow low 64k, wrap-around and kernel space */
1400 if (((char *)base < (char *)0x10000) ||
1401 ((char *)base + size < (char *)base) ||
1402 is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
1403 return STATUS_INVALID_PARAMETER;
1404 }
1405 else
1406 {
1407 base = NULL;
1408 size = (size + page_mask) & ~page_mask;
1409 }
1410
1411 /* Compute the alloc type flags */
1412
1413 if (!(type & MEM_SYSTEM))
1414 {
1415 if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
1416 (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_TOP_DOWN | MEM_WRITE_WATCH | MEM_RESET)))
1417 {
1418 WARN("called with wrong alloc type flags (%08x) !\n", type);
1419 return STATUS_INVALID_PARAMETER;
1420 }
1421 if (type & MEM_WRITE_WATCH)
1422 {
1423 FIXME("MEM_WRITE_WATCH type not supported\n");
1424 return STATUS_NOT_SUPPORTED;
1425 }
1426 }
1427 vprot = VIRTUAL_GetProt( protect );
1428 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
1429
1430 /* Reserve the memory */
1431
1432 if (use_locks) RtlEnterCriticalSection( &csVirtual );
1433
1434 if (type & MEM_SYSTEM)
1435 {
1436 if (type & MEM_IMAGE) vprot |= VPROT_IMAGE;
1437 status = create_view( &view, base, size, vprot | VPROT_COMMITTED );
1438 if (status == STATUS_SUCCESS)
1439 {
1440 view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
1441 base = view->base;
1442 }
1443 }
1444 else if ((type & MEM_RESERVE) || !base)
1445 {
1446 status = map_view( &view, base, size, mask, type & MEM_TOP_DOWN, vprot );
1447 if (status == STATUS_SUCCESS)
1448 {
1449 view->flags |= VFLAG_VALLOC;
1450 base = view->base;
1451 }
1452 }
1453 else /* commit the pages */
1454 {
1455 if (!(view = VIRTUAL_FindView( base )) ||
1456 ((char *)base + size > (char *)view->base + view->size)) status = STATUS_NOT_MAPPED_VIEW;
1457 else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1458 }
1459
1460 if (use_locks) RtlLeaveCriticalSection( &csVirtual );
1461
1462 if (status == STATUS_SUCCESS)
1463 {
1464 *ret = base;
1465 *size_ptr = size;
1466 }
1467 return status;
1468 }
1469
1470
1471 /***********************************************************************
1472 * NtFreeVirtualMemory (NTDLL.@)
1473 * ZwFreeVirtualMemory (NTDLL.@)
1474 */
1475 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr, ULONG type )
1476 {
1477 FILE_VIEW *view;
1478 char *base;
1479 NTSTATUS status = STATUS_SUCCESS;
1480 LPVOID addr = *addr_ptr;
1481 SIZE_T size = *size_ptr;
1482
1483 TRACE("%p %p %08lx %x\n", process, addr, size, type );
1484
1485 if (!is_current_process( process ))
1486 {
1487 ERR("Unsupported on other process\n");
1488 return STATUS_ACCESS_DENIED;
1489 }
1490
1491 /* Fix the parameters */
1492
1493 size = ROUND_SIZE( addr, size );
1494 base = ROUND_ADDR( addr, page_mask );
1495
1496 /* avoid freeing the DOS area when a broken app passes a NULL pointer */
1497 if (!base && !(type & MEM_SYSTEM)) return STATUS_INVALID_PARAMETER;
1498
1499 RtlEnterCriticalSection(&csVirtual);
1500
1501 if (!(view = VIRTUAL_FindView( base )) ||
1502 (base + size > (char *)view->base + view->size) ||
1503 !(view->flags & VFLAG_VALLOC))
1504 {
1505 status = STATUS_INVALID_PARAMETER;
1506 }
1507 else if (type & MEM_SYSTEM)
1508 {
1509 /* return the values that the caller should use to unmap the area */
1510 *addr_ptr = view->base;
1511 if (!wine_mmap_is_in_reserved_area( view->base, view->size )) *size_ptr = view->size;
1512 else *size_ptr = 0; /* make sure we don't munmap anything from a reserved area */
1513 view->flags |= VFLAG_SYSTEM;
1514 delete_view( view );
1515 }
1516 else if (type == MEM_RELEASE)
1517 {
1518 /* Free the pages */
1519
1520 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
1521 else
1522 {
1523 delete_view( view );
1524 *addr_ptr = base;
1525 *size_ptr = size;
1526 }
1527 }
1528 else if (type == MEM_DECOMMIT)
1529 {
1530 status = decommit_pages( view, base - (char *)view->base, size );
1531 if (status == STATUS_SUCCESS)
1532 {
1533 *addr_ptr = base;
1534 *size_ptr = size;
1535 }
1536 }
1537 else
1538 {
1539 WARN("called with wrong free type flags (%08x) !\n", type);
1540 status = STATUS_INVALID_PARAMETER;
1541 }
1542
1543 RtlLeaveCriticalSection(&csVirtual);
1544 return status;
1545 }
1546
1547
1548 /***********************************************************************
1549 * NtProtectVirtualMemory (NTDLL.@)
1550 * ZwProtectVirtualMemory (NTDLL.@)
1551 */
1552 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr,
1553 ULONG new_prot, ULONG *old_prot )
1554 {
1555 FILE_VIEW *view;
1556 NTSTATUS status = STATUS_SUCCESS;
1557 char *base;
1558 UINT i;
1559 BYTE vprot, *p;
1560 ULONG prot;
1561 SIZE_T size = *size_ptr;
1562 LPVOID addr = *addr_ptr;
1563
1564 TRACE("%p %p %08lx %08x\n", process, addr, size, new_prot );
1565
1566 if (!is_current_process( process ))
1567 {
1568 ERR("Unsupported on other process\n");
1569 return STATUS_ACCESS_DENIED;
1570 }
1571
1572 /* Fix the parameters */
1573
1574 size = ROUND_SIZE( addr, size );
1575 base = ROUND_ADDR( addr, page_mask );
1576
1577 RtlEnterCriticalSection( &csVirtual );
1578
1579 if (!(view = VIRTUAL_FindView( base )) || (base + size > (char *)view->base + view->size))
1580 {
1581 status = STATUS_INVALID_PARAMETER;
1582 }
1583 else
1584 {
1585 /* Make sure all the pages are committed */
1586
1587 p = view->prot + ((base - (char *)view->base) >> page_shift);
1588 prot = VIRTUAL_GetWin32Prot( *p );
1589 for (i = size >> page_shift; i; i--, p++)
1590 {
1591 if (!(*p & VPROT_COMMITTED))
1592 {
1593 status = STATUS_NOT_COMMITTED;
1594 break;
1595 }
1596 }
1597 if (!i)
1598 {
1599 if (old_prot) *old_prot = prot;
1600 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1601 if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1602 }
1603 }
1604 RtlLeaveCriticalSection( &csVirtual );
1605
1606 if (status == STATUS_SUCCESS)
1607 {
1608 *addr_ptr = base;
1609 *size_ptr = size;
1610 }
1611 return status;
1612 }
1613
1614 #define UNIMPLEMENTED_INFO_CLASS(c) \
1615 case c: \
1616 FIXME("(process=%p,addr=%p) Unimplemented information class: " #c "\n", process, addr); \
1617 return STATUS_INVALID_INFO_CLASS
1618
1619 /***********************************************************************
1620 * NtQueryVirtualMemory (NTDLL.@)
1621 * ZwQueryVirtualMemory (NTDLL.@)
1622 */
1623 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
1624 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
1625 SIZE_T len, SIZE_T *res_len )
1626 {
1627 FILE_VIEW *view;
1628 char *base, *alloc_base = 0;
1629 struct list *ptr;
1630 SIZE_T size = 0;
1631 MEMORY_BASIC_INFORMATION *info = buffer;
1632
1633 if (info_class != MemoryBasicInformation)
1634 {
1635 switch(info_class)
1636 {
1637 UNIMPLEMENTED_INFO_CLASS(MemoryWorkingSetList);
1638 UNIMPLEMENTED_INFO_CLASS(MemorySectionName);
1639 UNIMPLEMENTED_INFO_CLASS(MemoryBasicVlmInformation);
1640
1641 default:
1642 FIXME("(%p,%p,info_class=%d,%p,%ld,%p) Unknown information class\n",
1643 process, addr, info_class, buffer, len, res_len);
1644 return STATUS_INVALID_INFO_CLASS;
1645 }
1646 }
1647 if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
1648 return STATUS_WORKING_SET_LIMIT_RANGE;
1649
1650 if (!is_current_process( process ))
1651 {
1652 ERR("Unsupported on other process\n");
1653 return STATUS_ACCESS_DENIED;
1654 }
1655
1656 base = ROUND_ADDR( addr, page_mask );
1657
1658 /* Find the view containing the address */
1659
1660 RtlEnterCriticalSection(&csVirtual);
1661 ptr = list_head( &views_list );
1662 for (;;)
1663 {
1664 if (!ptr)
1665 {
1666 /* make the address space end at the user limit, except if
1667 * the last view was mapped beyond that */
1668 if (alloc_base <= (char *)user_space_limit)
1669 {
1670 if (user_space_limit && base >= (char *)user_space_limit)
1671 {
1672 RtlLeaveCriticalSection( &csVirtual );
1673 return STATUS_WORKING_SET_LIMIT_RANGE;
1674 }
1675 size = (char *)user_space_limit - alloc_base;
1676 }
1677 else size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1678 view = NULL;
1679 break;
1680 }
1681 view = LIST_ENTRY( ptr, struct file_view, entry );
1682 if ((char *)view->base > base)
1683 {
1684 size = (char *)view->base - alloc_base;
1685 view = NULL;
1686 break;
1687 }
1688 if ((char *)view->base + view->size > base)
1689 {
1690 alloc_base = view->base;
1691 size = view->size;
1692 break;
1693 }
1694 alloc_base = (char *)view->base + view->size;
1695 ptr = list_next( &views_list, ptr );
1696 }
1697
1698 /* Fill the info structure */
1699
1700 if (!view)
1701 {
1702 info->State = MEM_FREE;
1703 info->Protect = PAGE_NOACCESS;
1704 info->AllocationBase = 0;
1705 info->AllocationProtect = 0;
1706 info->Type = 0;
1707 }
1708 else
1709 {
1710 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1711 info->State = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
1712 info->Protect = VIRTUAL_GetWin32Prot( vprot );
1713 info->AllocationBase = alloc_base;
1714 info->AllocationProtect = VIRTUAL_GetWin32Prot( view->protect );
1715 if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
1716 else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
1717 else info->Type = MEM_MAPPED;
1718 for (size = base - alloc_base; size < view->size; size += page_size)
1719 if (view->prot[size >> page_shift] != vprot) break;
1720 }
1721 RtlLeaveCriticalSection(&csVirtual);
1722
1723 info->BaseAddress = base;
1724 info->RegionSize = size - (base - alloc_base);
1725 if (res_len) *res_len = sizeof(*info);
1726 return STATUS_SUCCESS;
1727 }
1728
1729
1730 /***********************************************************************
1731 * NtLockVirtualMemory (NTDLL.@)
1732 * ZwLockVirtualMemory (NTDLL.@)
1733 */
1734 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1735 {
1736 if (!is_current_process( process ))
1737 {
1738 ERR("Unsupported on other process\n");
1739 return STATUS_ACCESS_DENIED;
1740 }
1741 return STATUS_SUCCESS;
1742 }
1743
1744
1745 /***********************************************************************
1746 * NtUnlockVirtualMemory (NTDLL.@)
1747 * ZwUnlockVirtualMemory (NTDLL.@)
1748 */
1749 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1750 {
1751 if (!is_current_process( process ))
1752 {
1753 ERR("Unsupported on other process\n");
1754 return STATUS_ACCESS_DENIED;
1755 }
1756 return STATUS_SUCCESS;
1757 }
1758
1759
1760 /***********************************************************************
1761 * NtCreateSection (NTDLL.@)
1762 * ZwCreateSection (NTDLL.@)
1763 */
1764 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
1765 const LARGE_INTEGER *size, ULONG protect,
1766 ULONG sec_flags, HANDLE file )
1767 {
1768 NTSTATUS ret;
1769 BYTE vprot;
1770 DWORD len = (attr && attr->ObjectName) ? attr->ObjectName->Length : 0;
1771
1772 /* Check parameters */
1773
1774 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1775
1776 vprot = VIRTUAL_GetProt( protect );
1777 if (sec_flags & SEC_RESERVE)
1778 {
1779 if (file) return STATUS_INVALID_PARAMETER;
1780 }
1781 else vprot |= VPROT_COMMITTED;
1782 if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1783 if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
1784
1785 /* Create the server object */
1786
1787 SERVER_START_REQ( create_mapping )
1788 {
1789 req->access = access;
1790 req->attributes = (attr) ? attr->Attributes : 0;
1791 req->rootdir = attr ? attr->RootDirectory : 0;
1792 req->file_handle = file;
1793 req->size_high = size ? size->u.HighPart : 0;
1794 req->size_low = size ? size->u.LowPart : 0;
1795 req->protect = vprot;
1796 if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
1797 ret = wine_server_call( req );
1798 *handle = reply->handle;
1799 }
1800 SERVER_END_REQ;
1801 return ret;
1802 }
1803
1804
1805 /***********************************************************************
1806 * NtOpenSection (NTDLL.@)
1807 * ZwOpenSection (NTDLL.@)
1808 */
1809 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
1810 {
1811 NTSTATUS ret;
1812 DWORD len = attr->ObjectName->Length;
1813
1814 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1815
1816 SERVER_START_REQ( open_mapping )
1817 {
1818 req->access = access;
1819 req->attributes = (attr) ? attr->Attributes : 0;
1820 req->rootdir = attr ? attr->RootDirectory : 0;
1821 wine_server_add_data( req, attr->ObjectName->Buffer, len );
1822 if (!(ret = wine_server_call( req ))) *handle = reply->handle;
1823 }
1824 SERVER_END_REQ;
1825 return ret;
1826 }
1827
1828
1829 /***********************************************************************
1830 * NtMapViewOfSection (NTDLL.@)
1831 * ZwMapViewOfSection (NTDLL.@)
1832 */
1833 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
1834 SIZE_T commit_size, const LARGE_INTEGER *offset_ptr, SIZE_T *size_ptr,
1835 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
1836 {
1837 NTSTATUS res;
1838 SIZE_T size = 0;
1839 SIZE_T mask = get_mask( zero_bits );
1840 int unix_handle = -1, flags, needs_close;
1841 int prot;
1842 void *base;
1843 struct file_view *view;
1844 DWORD size_low, size_high, header_size, shared_size;
1845 HANDLE shared_file;
1846 BOOL removable = FALSE;
1847 LARGE_INTEGER offset;
1848
1849 offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
1850
1851 TRACE("handle=%p process=%p addr=%p off=%x%08x size=%lx access=%x\n",
1852 handle, process, *addr_ptr, offset.u.HighPart, offset.u.LowPart, size, protect );
1853
1854 if (!is_current_process( process ))
1855 {
1856 ERR("Unsupported on other process\n");
1857 return STATUS_ACCESS_DENIED;
1858 }
1859
1860 /* Check parameters */
1861
1862 if ((offset.u.LowPart & mask) || (*addr_ptr && ((UINT_PTR)*addr_ptr & mask)))
1863 return STATUS_INVALID_PARAMETER;
1864
1865 SERVER_START_REQ( get_mapping_info )
1866 {
1867 req->handle = handle;
1868 res = wine_server_call( req );
1869 prot = reply->protect;
1870 base = reply->base;
1871 size_low = reply->size_low;
1872 size_high = reply->size_high;
1873 header_size = reply->header_size;
1874 shared_file = reply->shared_file;
1875 shared_size = reply->shared_size;
1876 }
1877 SERVER_END_REQ;
1878 if (res) return res;
1879
1880 if ((res = server_get_unix_fd( handle, 0, &unix_handle, &needs_close, NULL, &flags ))) return res;
1881 removable = (flags & FD_FLAG_REMOVABLE) != 0;
1882
1883 if (prot & VPROT_IMAGE)
1884 {
1885 if (shared_file)
1886 {
1887 int shared_fd, shared_needs_close;
1888
1889 if ((res = server_get_unix_fd( shared_file, FILE_READ_DATA|FILE_WRITE_DATA,
1890 &shared_fd, &shared_needs_close, NULL, NULL ))) goto done;
1891 res = map_image( handle, unix_handle, base, size_low, mask, header_size,
1892 shared_fd, removable, addr_ptr );
1893 if (shared_needs_close) close( shared_fd );
1894 NtClose( shared_file );
1895 }
1896 else
1897 {
1898 res = map_image( handle, unix_handle, base, size_low, mask, header_size,
1899 -1, removable, addr_ptr );
1900 }
1901 if (needs_close) close( unix_handle );
1902 if (!res) *size_ptr = size_low;
1903 return res;
1904 }
1905
1906 if (size_high)
1907 ERR("Sizes larger than 4Gb not supported\n");
1908
1909 if ((offset.u.LowPart >= size_low) ||
1910 (*size_ptr > size_low - offset.u.LowPart))
1911 {
1912 res = STATUS_INVALID_PARAMETER;
1913 goto done;
1914 }
1915 if (*size_ptr) size = ROUND_SIZE( offset.u.LowPart, *size_ptr );
1916 else size = size_low - offset.u.LowPart;
1917
1918 switch(protect)
1919 {
1920 case PAGE_NOACCESS:
1921 break;
1922 case PAGE_READWRITE:
1923 case PAGE_EXECUTE_READWRITE:
1924 if (!(prot & VPROT_WRITE))
1925 {
1926 res = STATUS_INVALID_PARAMETER;
1927 goto done;
1928 }
1929 removable = FALSE;
1930 /* fall through */
1931 case PAGE_READONLY:
1932 case PAGE_WRITECOPY:
1933 case PAGE_EXECUTE:
1934 case PAGE_EXECUTE_READ:
1935 case PAGE_EXECUTE_WRITECOPY:
1936 if (prot & VPROT_READ) break;
1937 /* fall through */
1938 default:
1939 res = STATUS_INVALID_PARAMETER;
1940 goto done;
1941 }
1942
1943 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1944 * which has a view of this mapping commits some pages, they will
1945 * appear committed in all other processes, which have the same
1946 * view created. Since we don't support this yet, we create the
1947 * whole mapping committed.
1948 */
1949 prot |= VPROT_COMMITTED;
1950
1951 /* Reserve a properly aligned area */
1952
1953 RtlEnterCriticalSection( &csVirtual );
1954
1955 res = map_view( &view, *addr_ptr, size, mask, FALSE, prot );
1956 if (res)
1957 {
1958 RtlLeaveCriticalSection( &csVirtual );
1959 goto done;
1960 }
1961
1962 /* Map the file */
1963
1964 TRACE("handle=%p size=%lx offset=%x%08x\n",
1965 handle, size, offset.u.HighPart, offset.u.LowPart );
1966
1967 res = map_file_into_view( view, unix_handle, 0, size, offset.QuadPart, prot, removable );
1968 if (res == STATUS_SUCCESS)
1969 {
1970 if (!removable) /* don't keep handle open on removable media */
1971 NtDuplicateObject( NtCurrentProcess(), handle,
1972 NtCurrentProcess(), &view->mapping,
1973 0, 0, DUPLICATE_SAME_ACCESS );
1974
1975 *addr_ptr = view->base;
1976 *size_ptr = size;
1977 }
1978 else
1979 {
1980 ERR( "map_file_into_view %p %lx %x%08x failed\n",
1981 view->base, size, offset.u.HighPart, offset.u.LowPart );
1982 delete_view( view );
1983 }
1984
1985 RtlLeaveCriticalSection( &csVirtual );
1986
1987 done:
1988 if (needs_close) close( unix_handle );
1989 return res;
1990 }
1991
1992
1993 /***********************************************************************
1994 * NtUnmapViewOfSection (NTDLL.@)
1995 * ZwUnmapViewOfSection (NTDLL.@)
1996 */
1997 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
1998 {
1999 FILE_VIEW *view;
2000 NTSTATUS status = STATUS_INVALID_PARAMETER;
2001 void *base = ROUND_ADDR( addr, page_mask );
2002
2003 if (!is_current_process( process ))
2004 {
2005 ERR("Unsupported on other process\n");
2006 return STATUS_ACCESS_DENIED;
2007 }
2008 RtlEnterCriticalSection( &csVirtual );
2009 if ((view = VIRTUAL_FindView( base )) && (base == view->base))
2010 {
2011 delete_view( view );
2012 status = STATUS_SUCCESS;
2013 }
2014 RtlLeaveCriticalSection( &csVirtual );
2015 return status;
2016 }
2017
2018
2019 /***********************************************************************
2020 * NtFlushVirtualMemory (NTDLL.@)
2021 * ZwFlushVirtualMemory (NTDLL.@)
2022 */
2023 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
2024 SIZE_T *size_ptr, ULONG unknown )
2025 {
2026 FILE_VIEW *view;
2027 NTSTATUS status = STATUS_SUCCESS;
2028 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
2029
2030 if (!is_current_process( process ))
2031 {
2032 ERR("Unsupported on other process\n");
2033 return STATUS_ACCESS_DENIED;
2034 }
2035 RtlEnterCriticalSection( &csVirtual );
2036 if (!(view = VIRTUAL_FindView( addr ))) status = STATUS_INVALID_PARAMETER;
2037 else
2038 {
2039 if (!*size_ptr) *size_ptr = view->size;
2040 *addr_ptr = addr;
2041 if (msync( addr, *size_ptr, MS_SYNC )) status = STATUS_NOT_MAPPED_DATA;
2042 }
2043 RtlLeaveCriticalSection( &csVirtual );
2044 return status;
2045 }
2046
2047
2048 /***********************************************************************
2049 * NtReadVirtualMemory (NTDLL.@)
2050 * ZwReadVirtualMemory (NTDLL.@)
2051 */
2052 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
2053 SIZE_T size, SIZE_T *bytes_read )
2054 {
2055 NTSTATUS status;
2056
2057 SERVER_START_REQ( read_process_memory )
2058 {
2059 req->handle = process;
2060 req->addr = (void *)addr;
2061 wine_server_set_reply( req, buffer, size );
2062 if ((status = wine_server_call( req ))) size = 0;
2063 }
2064 SERVER_END_REQ;
2065 if (bytes_read) *bytes_read = size;
2066 return status;
2067 }
2068
2069
2070 /***********************************************************************
2071 * NtWriteVirtualMemory (NTDLL.@)
2072 * ZwWriteVirtualMemory (NTDLL.@)
2073 */
2074 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
2075 SIZE_T size, SIZE_T *bytes_written )
2076 {
2077 NTSTATUS status;
2078
2079 SERVER_START_REQ( write_process_memory )
2080 {
2081 req->handle = process;
2082 req->addr = addr;
2083 wine_server_add_data( req, buffer, size );
2084 if ((status = wine_server_call( req ))) size = 0;
2085 }
2086 SERVER_END_REQ;
2087 if (bytes_written) *bytes_written = size;
2088 return status;
2089 }
GDI DIB driver