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fusion: Implement CreateAssemblyCache.
[wine.git] / dlls / ntdll / virtual.c
blob1c44d49e4ccc1a9ad0ff749b6b27220b42761c62
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 "wine/library.h"
52 #include "wine/server.h"
53 #include "wine/list.h"
54 #include "wine/debug.h"
55 #include "ntdll_misc.h"
56
57 WINE_DEFAULT_DEBUG_CHANNEL(virtual);
58 WINE_DECLARE_DEBUG_CHANNEL(module);
59
60 #ifndef MS_SYNC
61 #define MS_SYNC 0
62 #endif
63
64 #ifndef MAP_NORESERVE
65 #define MAP_NORESERVE 0
66 #endif
67
68 /* File view */
69 typedef struct file_view
70 {
71 struct list entry; /* Entry in global view list */
72 void *base; /* Base address */
73 size_t size; /* Size in bytes */
74 HANDLE mapping; /* Handle to the file mapping */
75 BYTE flags; /* Allocation flags (VFLAG_*) */
76 BYTE protect; /* Protection for all pages at allocation time */
77 BYTE prot[1]; /* Protection byte for each page */
78 } FILE_VIEW;
79
80 /* Per-view flags */
81 #define VFLAG_SYSTEM 0x01 /* system view (underlying mmap not under our control) */
82 #define VFLAG_VALLOC 0x02 /* allocated by VirtualAlloc */
83
84 /* Conversion from VPROT_* to Win32 flags */
85 static const BYTE VIRTUAL_Win32Flags[16] =
86 {
87 PAGE_NOACCESS, /* 0 */
88 PAGE_READONLY, /* READ */
89 PAGE_READWRITE, /* WRITE */
90 PAGE_READWRITE, /* READ | WRITE */
91 PAGE_EXECUTE, /* EXEC */
92 PAGE_EXECUTE_READ, /* READ | EXEC */
93 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
94 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
95 PAGE_WRITECOPY, /* WRITECOPY */
96 PAGE_WRITECOPY, /* READ | WRITECOPY */
97 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
98 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
99 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
100 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
101 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
102 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
103 };
104
105 static struct list views_list = LIST_INIT(views_list);
106
107 static RTL_CRITICAL_SECTION csVirtual;
108 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
109 {
110 0, 0, &csVirtual,
111 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
112 0, 0, { (DWORD_PTR)(__FILE__ ": csVirtual") }
113 };
114 static RTL_CRITICAL_SECTION csVirtual = { &critsect_debug, -1, 0, 0, 0, 0 };
115
116 #ifdef __i386__
117 /* These are always the same on an i386, and it will be faster this way */
118 # define page_mask 0xfff
119 # define page_shift 12
120 # define page_size 0x1000
121 /* Note: these are Windows limits, you cannot change them. */
122 # define ADDRESS_SPACE_LIMIT ((void *)0xc0000000) /* top of the total available address space */
123 # define USER_SPACE_LIMIT ((void *)0x7fff0000) /* top of the user address space */
124 #else
125 static UINT page_shift;
126 static UINT page_size;
127 static UINT_PTR page_mask;
128 # define ADDRESS_SPACE_LIMIT 0 /* no limit needed on other platforms */
129 # define USER_SPACE_LIMIT 0 /* no limit needed on other platforms */
130 #endif /* __i386__ */
131
132 #define ROUND_ADDR(addr,mask) \
133 ((void *)((UINT_PTR)(addr) & ~(UINT_PTR)(mask)))
134
135 #define ROUND_SIZE(addr,size) \
136 (((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
137
138 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
139 do { if (TRACE_ON(virtual)) VIRTUAL_DumpView(view); } while (0)
140
141 static void *user_space_limit = USER_SPACE_LIMIT;
142 static void *preload_reserve_start;
143 static void *preload_reserve_end;
144 static int use_locks;
145 static int force_exec_prot; /* whether to force PROT_EXEC on all PROT_READ mmaps */
146
147
148 /***********************************************************************
149 * VIRTUAL_GetProtStr
150 */
151 static const char *VIRTUAL_GetProtStr( BYTE prot )
152 {
153 static char buffer[6];
154 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
155 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
156 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
157 buffer[3] = (prot & VPROT_WRITECOPY) ? 'W' : ((prot & VPROT_WRITE) ? 'w' : '-');
158 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
159 buffer[5] = 0;
160 return buffer;
161 }
162
163
164 /***********************************************************************
165 * VIRTUAL_GetUnixProt
166 *
167 * Convert page protections to protection for mmap/mprotect.
168 */
169 static int VIRTUAL_GetUnixProt( BYTE vprot )
170 {
171 int prot = 0;
172 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
173 {
174 if (vprot & VPROT_READ) prot |= PROT_READ;
175 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
176 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
177 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
178 }
179 if (!prot) prot = PROT_NONE;
180 return prot;
181 }
182
183
184 /***********************************************************************
185 * VIRTUAL_DumpView
186 */
187 static void VIRTUAL_DumpView( FILE_VIEW *view )
188 {
189 UINT i, count;
190 char *addr = view->base;
191 BYTE prot = view->prot[0];
192
193 TRACE( "View: %p - %p", addr, addr + view->size - 1 );
194 if (view->flags & VFLAG_SYSTEM)
195 TRACE( " (system)\n" );
196 else if (view->flags & VFLAG_VALLOC)
197 TRACE( " (valloc)\n" );
198 else if (view->mapping)
199 TRACE( " %p\n", view->mapping );
200 else
201 TRACE( " (anonymous)\n");
202
203 for (count = i = 1; i < view->size >> page_shift; i++, count++)
204 {
205 if (view->prot[i] == prot) continue;
206 TRACE( " %p - %p %s\n",
207 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
208 addr += (count << page_shift);
209 prot = view->prot[i];
210 count = 0;
211 }
212 if (count)
213 TRACE( " %p - %p %s\n",
214 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
215 }
216
217
218 /***********************************************************************
219 * VIRTUAL_Dump
220 */
221 #if WINE_VM_DEBUG
222 static void VIRTUAL_Dump(void)
223 {
224 sigset_t sigset;
225 struct file_view *view;
226
227 TRACE( "Dump of all virtual memory views:\n" );
228 server_enter_uninterrupted_section( &csVirtual, &sigset );
229 LIST_FOR_EACH_ENTRY( view, &views_list, FILE_VIEW, entry )
230 {
231 VIRTUAL_DumpView( view );
232 }
233 server_leave_uninterrupted_section( &csVirtual, &sigset );
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( const void *addr, size_t size, const void *limit )
370 {
371 return (limit && (addr >= limit || (const char *)addr + size > (const 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) /* we cannot fake shared write mappings */
828 {
829 if (errno == EINVAL) return STATUS_INVALID_PARAMETER;
830 ERR( "shared writable mmap not supported, broken filesystem?\n" );
831 return STATUS_NOT_SUPPORTED;
832 }
833 }
834
835 /* Reserve the memory with an anonymous mmap */
836 ptr = wine_anon_mmap( (char *)view->base + start, size, PROT_READ | PROT_WRITE, MAP_FIXED );
837 if (ptr == (void *)-1) return FILE_GetNtStatus();
838 /* Now read in the file */
839 pread( fd, ptr, size, offset );
840 if (prot != (PROT_READ|PROT_WRITE)) mprotect( ptr, size, prot ); /* Set the right protection */
841 done:
842 memset( view->prot + (start >> page_shift), vprot, ROUND_SIZE(start,size) >> page_shift );
843 return STATUS_SUCCESS;
844 }
845
846
847 /***********************************************************************
848 * decommit_view
849 *
850 * Decommit some pages of a given view.
851 * The csVirtual section must be held by caller.
852 */
853 static NTSTATUS decommit_pages( struct file_view *view, size_t start, size_t size )
854 {
855 if (wine_anon_mmap( (char *)view->base + start, size, PROT_NONE, MAP_FIXED ) != (void *)-1)
856 {
857 BYTE *p = view->prot + (start >> page_shift);
858 size >>= page_shift;
859 while (size--) *p++ &= ~VPROT_COMMITTED;
860 return STATUS_SUCCESS;
861 }
862 return FILE_GetNtStatus();
863 }
864
865
866 /***********************************************************************
867 * do_relocations
868 *
869 * Apply the relocations to a mapped PE image
870 */
871 static int do_relocations( char *base, const IMAGE_DATA_DIRECTORY *dir,
872 int delta, SIZE_T total_size )
873 {
874 IMAGE_BASE_RELOCATION *rel;
875
876 TRACE_(module)( "relocating from %p-%p to %p-%p\n",
877 base - delta, base - delta + total_size, base, base + total_size );
878
879 for (rel = (IMAGE_BASE_RELOCATION *)(base + dir->VirtualAddress);
880 ((char *)rel < base + dir->VirtualAddress + dir->Size) && rel->SizeOfBlock;
881 rel = (IMAGE_BASE_RELOCATION*)((char*)rel + rel->SizeOfBlock) )
882 {
883 char *page = base + rel->VirtualAddress;
884 WORD *TypeOffset = (WORD *)(rel + 1);
885 int i, count = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(*TypeOffset);
886
887 if (!count) continue;
888
889 /* sanity checks */
890 if ((char *)rel + rel->SizeOfBlock > base + dir->VirtualAddress + dir->Size)
891 {
892 ERR_(module)("invalid relocation %p,%x,%d at %p,%x,%x\n",
893 rel, rel->VirtualAddress, rel->SizeOfBlock,
894 base, dir->VirtualAddress, dir->Size );
895 return 0;
896 }
897
898 if (page > base + total_size)
899 {
900 WARN_(module)("skipping %d relocations for page %p beyond module %p-%p\n",
901 count, page, base, base + total_size );
902 continue;
903 }
904
905 TRACE_(module)("%d relocations for page %x\n", count, rel->VirtualAddress);
906
907 /* patching in reverse order */
908 for (i = 0 ; i < count; i++)
909 {
910 int offset = TypeOffset[i] & 0xFFF;
911 int type = TypeOffset[i] >> 12;
912 switch(type)
913 {
914 case IMAGE_REL_BASED_ABSOLUTE:
915 break;
916 case IMAGE_REL_BASED_HIGH:
917 *(short*)(page+offset) += HIWORD(delta);
918 break;
919 case IMAGE_REL_BASED_LOW:
920 *(short*)(page+offset) += LOWORD(delta);
921 break;
922 case IMAGE_REL_BASED_HIGHLOW:
923 *(int*)(page+offset) += delta;
924 /* FIXME: if this is an exported address, fire up enhanced logic */
925 break;
926 default:
927 FIXME_(module)("Unknown/unsupported fixup type %d.\n", type);
928 break;
929 }
930 }
931 }
932 return 1;
933 }
934
935
936 /***********************************************************************
937 * map_image
938 *
939 * Map an executable (PE format) image into memory.
940 */
941 static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, SIZE_T total_size, SIZE_T mask,
942 SIZE_T header_size, int shared_fd, HANDLE dup_mapping, PVOID *addr_ptr )
943 {
944 IMAGE_DOS_HEADER *dos;
945 IMAGE_NT_HEADERS *nt;
946 IMAGE_SECTION_HEADER *sec;
947 IMAGE_DATA_DIRECTORY *imports;
948 NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
949 int i;
950 off_t pos;
951 sigset_t sigset;
952 struct stat st;
953 struct file_view *view = NULL;
954 char *ptr, *header_end;
955
956 /* zero-map the whole range */
957
958 server_enter_uninterrupted_section( &csVirtual, &sigset );
959
960 if (base >= (char *)0x110000) /* make sure the DOS area remains free */
961 status = map_view( &view, base, total_size, mask, FALSE,
962 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
963
964 if (status == STATUS_CONFLICTING_ADDRESSES)
965 status = map_view( &view, NULL, total_size, mask, FALSE,
966 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
967
968 if (status != STATUS_SUCCESS) goto error;
969
970 ptr = view->base;
971 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
972
973 /* map the header */
974
975 if (fstat( fd, &st ) == -1)
976 {
977 status = FILE_GetNtStatus();
978 goto error;
979 }
980 status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
981 if (!st.st_size) goto error;
982 header_size = min( header_size, st.st_size );
983 if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
984 !dup_mapping ) != STATUS_SUCCESS) goto error;
985 dos = (IMAGE_DOS_HEADER *)ptr;
986 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
987 header_end = ptr + ROUND_SIZE( 0, header_size );
988 memset( ptr + header_size, 0, header_end - (ptr + header_size) );
989 if ((char *)(nt + 1) > header_end) goto error;
990 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
991 if ((char *)(sec + nt->FileHeader.NumberOfSections) > header_end) goto error;
992
993 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
994 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
995
996 /* check the architecture */
997
998 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
999 {
1000 MESSAGE("Trying to load PE image for unsupported architecture (");
1001 switch (nt->FileHeader.Machine)
1002 {
1003 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
1004 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
1005 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
1006 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
1007 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
1008 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
1009 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
1010 case IMAGE_FILE_MACHINE_IA64: MESSAGE("IA-64"); break;
1011 case IMAGE_FILE_MACHINE_ALPHA64: MESSAGE("Alpha-64"); break;
1012 case IMAGE_FILE_MACHINE_AMD64: MESSAGE("AMD-64"); break;
1013 case IMAGE_FILE_MACHINE_ARM: MESSAGE("ARM"); break;
1014 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
1015 }
1016 MESSAGE(")\n");
1017 goto error;
1018 }
1019
1020 /* check for non page-aligned binary */
1021
1022 if (nt->OptionalHeader.SectionAlignment <= page_mask)
1023 {
1024 /* unaligned sections, this happens for native subsystem binaries */
1025 /* in that case Windows simply maps in the whole file */
1026
1027 if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ,
1028 !dup_mapping ) != STATUS_SUCCESS) goto error;
1029
1030 /* check that all sections are loaded at the right offset */
1031 if (nt->OptionalHeader.FileAlignment != nt->OptionalHeader.SectionAlignment) goto error;
1032 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
1033 {
1034 if (sec[i].VirtualAddress != sec[i].PointerToRawData)
1035 goto error; /* Windows refuses to load in that case too */
1036 }
1037
1038 /* set the image protections */
1039 VIRTUAL_SetProt( view, ptr, total_size,
1040 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
1041
1042 /* perform relocations if necessary */
1043 /* FIXME: not 100% compatible, Windows doesn't do this for non page-aligned binaries */
1044 if (ptr != base)
1045 {
1046 const IMAGE_DATA_DIRECTORY *relocs;
1047 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1048 if (relocs->VirtualAddress && relocs->Size)
1049 do_relocations( ptr, relocs, ptr - base, total_size );
1050 }
1051
1052 goto done;
1053 }
1054
1055
1056 /* map all the sections */
1057
1058 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1059 {
1060 static const SIZE_T sector_align = 0x1ff;
1061 SIZE_T map_size, file_start, file_size, end;
1062
1063 if (!sec->Misc.VirtualSize)
1064 map_size = ROUND_SIZE( 0, sec->SizeOfRawData );
1065 else
1066 map_size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
1067
1068 /* file positions are rounded to sector boundaries regardless of OptionalHeader.FileAlignment */
1069 file_start = sec->PointerToRawData & ~sector_align;
1070 file_size = (sec->SizeOfRawData + (sec->PointerToRawData & sector_align) + sector_align) & ~sector_align;
1071 if (file_size > map_size) file_size = map_size;
1072
1073 /* a few sanity checks */
1074 end = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, map_size );
1075 if (sec->VirtualAddress > total_size || end > total_size || end < sec->VirtualAddress)
1076 {
1077 WARN_(module)( "Section %.8s too large (%x+%lx/%lx)\n",
1078 sec->Name, sec->VirtualAddress, map_size, total_size );
1079 goto error;
1080 }
1081
1082 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
1083 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
1084 {
1085 TRACE_(module)( "mapping shared section %.8s at %p off %x (%x) size %lx (%lx) flags %x\n",
1086 sec->Name, ptr + sec->VirtualAddress,
1087 sec->PointerToRawData, (int)pos, file_size, map_size,
1088 sec->Characteristics );
1089 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, map_size, pos,
1090 VPROT_COMMITTED | VPROT_READ | VPROT_WRITE,
1091 FALSE ) != STATUS_SUCCESS)
1092 {
1093 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
1094 goto error;
1095 }
1096
1097 /* check if the import directory falls inside this section */
1098 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
1099 imports->VirtualAddress < sec->VirtualAddress + map_size)
1100 {
1101 UINT_PTR base = imports->VirtualAddress & ~page_mask;
1102 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
1103 if (end > sec->VirtualAddress + map_size) end = sec->VirtualAddress + map_size;
1104 if (end > base)
1105 map_file_into_view( view, shared_fd, base, end - base,
1106 pos + (base - sec->VirtualAddress),
1107 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1108 FALSE );
1109 }
1110 pos += map_size;
1111 continue;
1112 }
1113
1114 TRACE_(module)( "mapping section %.8s at %p off %x size %x virt %x flags %x\n",
1115 sec->Name, ptr + sec->VirtualAddress,
1116 sec->PointerToRawData, sec->SizeOfRawData,
1117 sec->Misc.VirtualSize, sec->Characteristics );
1118
1119 if (!sec->PointerToRawData || !file_size) continue;
1120
1121 /* Note: if the section is not aligned properly map_file_into_view will magically
1122 * fall back to read(), so we don't need to check anything here.
1123 */
1124 end = file_start + file_size;
1125 if (sec->PointerToRawData >= st.st_size ||
1126 end > ((st.st_size + sector_align) & ~sector_align) ||
1127 end < file_start ||
1128 map_file_into_view( view, fd, sec->VirtualAddress, file_size, file_start,
1129 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1130 !dup_mapping ) != STATUS_SUCCESS)
1131 {
1132 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
1133 goto error;
1134 }
1135
1136 if (file_size & page_mask)
1137 {
1138 end = ROUND_SIZE( 0, file_size );
1139 if (end > map_size) end = map_size;
1140 TRACE_(module)("clearing %p - %p\n",
1141 ptr + sec->VirtualAddress + file_size,
1142 ptr + sec->VirtualAddress + end );
1143 memset( ptr + sec->VirtualAddress + file_size, 0, end - file_size );
1144 }
1145 }
1146
1147
1148 /* perform base relocation, if necessary */
1149
1150 if (ptr != base &&
1151 ((nt->FileHeader.Characteristics & IMAGE_FILE_DLL) ||
1152 !NtCurrentTeb()->Peb->ImageBaseAddress) )
1153 {
1154 const IMAGE_DATA_DIRECTORY *relocs;
1155
1156 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1157 if (nt->FileHeader.Characteristics & IMAGE_FILE_RELOCS_STRIPPED)
1158 {
1159 WARN_(module)( "Need to relocate module from addr %lx, but there are no relocation records\n",
1160 (ULONG_PTR)nt->OptionalHeader.ImageBase );
1161 status = STATUS_CONFLICTING_ADDRESSES;
1162 goto error;
1163 }
1164
1165 /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
1166 * really make sure that the *new* base address is also > 2GB.
1167 * Some DLLs really check the MSB of the module handle :-/
1168 */
1169 if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((ULONG_PTR)base & 0x80000000))
1170 ERR_(module)( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
1171
1172 if (!do_relocations( ptr, relocs, ptr - base, total_size ))
1173 {
1174 goto error;
1175 }
1176 }
1177
1178 /* set the image protections */
1179
1180 VIRTUAL_SetProt( view, ptr, ROUND_SIZE( 0, header_size ), VPROT_COMMITTED | VPROT_READ );
1181
1182 sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
1183 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1184 {
1185 SIZE_T size;
1186 BYTE vprot = VPROT_COMMITTED;
1187
1188 if (sec->Misc.VirtualSize)
1189 size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
1190 else
1191 size = ROUND_SIZE( sec->VirtualAddress, sec->SizeOfRawData );
1192
1193 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
1194 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_READ|VPROT_WRITECOPY;
1195 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
1196
1197 /* Dumb game crack lets the AOEP point into a data section. Adjust. */
1198 if ((nt->OptionalHeader.AddressOfEntryPoint >= sec->VirtualAddress) &&
1199 (nt->OptionalHeader.AddressOfEntryPoint < sec->VirtualAddress + size))
1200 vprot |= VPROT_EXEC;
1201
1202 VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
1203 }
1204
1205 done:
1206 view->mapping = dup_mapping;
1207 server_leave_uninterrupted_section( &csVirtual, &sigset );
1208
1209 *addr_ptr = ptr;
1210 return STATUS_SUCCESS;
1211
1212 error:
1213 if (view) delete_view( view );
1214 server_leave_uninterrupted_section( &csVirtual, &sigset );
1215 if (dup_mapping) NtClose( dup_mapping );
1216 return status;
1217 }
1218
1219
1220 /***********************************************************************
1221 * virtual_init
1222 */
1223 void virtual_init(void)
1224 {
1225 const char *preload;
1226 #ifndef page_mask
1227 page_size = getpagesize();
1228 page_mask = page_size - 1;
1229 /* Make sure we have a power of 2 */
1230 assert( !(page_size & page_mask) );
1231 page_shift = 0;
1232 while ((1 << page_shift) != page_size) page_shift++;
1233 #endif /* page_mask */
1234 if ((preload = getenv("WINEPRELOADRESERVE")))
1235 {
1236 unsigned long start, end;
1237 if (sscanf( preload, "%lx-%lx", &start, &end ) == 2)
1238 {
1239 preload_reserve_start = (void *)start;
1240 preload_reserve_end = (void *)end;
1241 }
1242 }
1243 }
1244
1245
1246 /***********************************************************************
1247 * virtual_init_threading
1248 */
1249 void virtual_init_threading(void)
1250 {
1251 use_locks = 1;
1252 }
1253
1254
1255 /***********************************************************************
1256 * VIRTUAL_HandleFault
1257 */
1258 NTSTATUS VIRTUAL_HandleFault( LPCVOID addr )
1259 {
1260 FILE_VIEW *view;
1261 NTSTATUS ret = STATUS_ACCESS_VIOLATION;
1262 sigset_t sigset;
1263
1264 server_enter_uninterrupted_section( &csVirtual, &sigset );
1265 if ((view = VIRTUAL_FindView( addr )))
1266 {
1267 void *page = ROUND_ADDR( addr, page_mask );
1268 BYTE vprot = view->prot[((const char *)page - (const char *)view->base) >> page_shift];
1269 if (vprot & VPROT_GUARD)
1270 {
1271 VIRTUAL_SetProt( view, page, page_size, vprot & ~VPROT_GUARD );
1272 ret = STATUS_GUARD_PAGE_VIOLATION;
1273 }
1274 }
1275 server_leave_uninterrupted_section( &csVirtual, &sigset );
1276 return ret;
1277 }
1278
1279
1280 /***********************************************************************
1281 * VIRTUAL_SetForceExec
1282 *
1283 * Whether to force exec prot on all views.
1284 */
1285 void VIRTUAL_SetForceExec( BOOL enable )
1286 {
1287 struct file_view *view;
1288 sigset_t sigset;
1289
1290 server_enter_uninterrupted_section( &csVirtual, &sigset );
1291 if (!force_exec_prot != !enable) /* change all existing views */
1292 {
1293 force_exec_prot = enable;
1294
1295 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
1296 {
1297 UINT i, count;
1298 int unix_prot;
1299 char *addr = view->base;
1300 BYTE prot = view->prot[0];
1301
1302 for (count = i = 1; i < view->size >> page_shift; i++, count++)
1303 {
1304 if (view->prot[i] == prot) continue;
1305 unix_prot = VIRTUAL_GetUnixProt( prot );
1306 if ((unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
1307 {
1308 TRACE( "%s exec prot for %p-%p\n",
1309 force_exec_prot ? "enabling" : "disabling",
1310 addr, addr + (count << page_shift) - 1 );
1311 mprotect( addr, count << page_shift,
1312 unix_prot | (force_exec_prot ? PROT_EXEC : 0) );
1313 }
1314 addr += (count << page_shift);
1315 prot = view->prot[i];
1316 count = 0;
1317 }
1318 if (count)
1319 {
1320 unix_prot = VIRTUAL_GetUnixProt( prot );
1321 if ((unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
1322 {
1323 TRACE( "%s exec prot for %p-%p\n",
1324 force_exec_prot ? "enabling" : "disabling",
1325 addr, addr + (count << page_shift) - 1 );
1326 mprotect( addr, count << page_shift,
1327 unix_prot | (force_exec_prot ? PROT_EXEC : 0) );
1328 }
1329 }
1330 }
1331 }
1332 server_leave_uninterrupted_section( &csVirtual, &sigset );
1333 }
1334
1335
1336 /***********************************************************************
1337 * VIRTUAL_UseLargeAddressSpace
1338 *
1339 * Increase the address space size for apps that support it.
1340 */
1341 void VIRTUAL_UseLargeAddressSpace(void)
1342 {
1343 /* no large address space on win9x */
1344 if (NtCurrentTeb()->Peb->OSPlatformId != VER_PLATFORM_WIN32_NT) return;
1345 user_space_limit = ADDRESS_SPACE_LIMIT;
1346 }
1347
1348
1349 /***********************************************************************
1350 * NtAllocateVirtualMemory (NTDLL.@)
1351 * ZwAllocateVirtualMemory (NTDLL.@)
1352 */
1353 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
1354 SIZE_T *size_ptr, ULONG type, ULONG protect )
1355 {
1356 void *base;
1357 BYTE vprot;
1358 SIZE_T size = *size_ptr;
1359 SIZE_T mask = get_mask( zero_bits );
1360 NTSTATUS status = STATUS_SUCCESS;
1361 struct file_view *view;
1362 sigset_t sigset;
1363
1364 TRACE("%p %p %08lx %x %08x\n", process, *ret, size, type, protect );
1365
1366 if (!size) return STATUS_INVALID_PARAMETER;
1367
1368 if (process != NtCurrentProcess())
1369 {
1370 apc_call_t call;
1371 apc_result_t result;
1372
1373 memset( &call, 0, sizeof(call) );
1374
1375 call.virtual_alloc.type = APC_VIRTUAL_ALLOC;
1376 call.virtual_alloc.addr = *ret;
1377 call.virtual_alloc.size = *size_ptr;
1378 call.virtual_alloc.zero_bits = zero_bits;
1379 call.virtual_alloc.op_type = type;
1380 call.virtual_alloc.prot = protect;
1381 status = NTDLL_queue_process_apc( process, &call, &result );
1382 if (status != STATUS_SUCCESS) return status;
1383
1384 if (result.virtual_alloc.status == STATUS_SUCCESS)
1385 {
1386 *ret = result.virtual_alloc.addr;
1387 *size_ptr = result.virtual_alloc.size;
1388 }
1389 return result.virtual_alloc.status;
1390 }
1391
1392 /* Round parameters to a page boundary */
1393
1394 if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
1395
1396 if (*ret)
1397 {
1398 if (type & MEM_RESERVE) /* Round down to 64k boundary */
1399 base = ROUND_ADDR( *ret, mask );
1400 else
1401 base = ROUND_ADDR( *ret, page_mask );
1402 size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1403
1404 /* disallow low 64k, wrap-around and kernel space */
1405 if (((char *)base < (char *)0x10000) ||
1406 ((char *)base + size < (char *)base) ||
1407 is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
1408 return STATUS_INVALID_PARAMETER;
1409 }
1410 else
1411 {
1412 base = NULL;
1413 size = (size + page_mask) & ~page_mask;
1414 }
1415
1416 /* Compute the alloc type flags */
1417
1418 if (!(type & MEM_SYSTEM))
1419 {
1420 if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
1421 (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_TOP_DOWN | MEM_WRITE_WATCH | MEM_RESET)))
1422 {
1423 WARN("called with wrong alloc type flags (%08x) !\n", type);
1424 return STATUS_INVALID_PARAMETER;
1425 }
1426 if (type & MEM_WRITE_WATCH)
1427 {
1428 FIXME("MEM_WRITE_WATCH type not supported\n");
1429 return STATUS_NOT_SUPPORTED;
1430 }
1431 }
1432 vprot = VIRTUAL_GetProt( protect );
1433 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
1434
1435 /* Reserve the memory */
1436
1437 if (use_locks) server_enter_uninterrupted_section( &csVirtual, &sigset );
1438
1439 if (type & MEM_SYSTEM)
1440 {
1441 if (type & MEM_IMAGE) vprot |= VPROT_IMAGE;
1442 status = create_view( &view, base, size, vprot | VPROT_COMMITTED );
1443 if (status == STATUS_SUCCESS)
1444 {
1445 view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
1446 base = view->base;
1447 }
1448 }
1449 else if ((type & MEM_RESERVE) || !base)
1450 {
1451 status = map_view( &view, base, size, mask, type & MEM_TOP_DOWN, vprot );
1452 if (status == STATUS_SUCCESS)
1453 {
1454 view->flags |= VFLAG_VALLOC;
1455 base = view->base;
1456 }
1457 }
1458 else /* commit the pages */
1459 {
1460 if (!(view = VIRTUAL_FindView( base )) ||
1461 ((char *)base + size > (char *)view->base + view->size)) status = STATUS_NOT_MAPPED_VIEW;
1462 else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1463 }
1464
1465 if (use_locks) server_leave_uninterrupted_section( &csVirtual, &sigset );
1466
1467 if (status == STATUS_SUCCESS)
1468 {
1469 *ret = base;
1470 *size_ptr = size;
1471 }
1472 return status;
1473 }
1474
1475
1476 /***********************************************************************
1477 * NtFreeVirtualMemory (NTDLL.@)
1478 * ZwFreeVirtualMemory (NTDLL.@)
1479 */
1480 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr, ULONG type )
1481 {
1482 FILE_VIEW *view;
1483 char *base;
1484 sigset_t sigset;
1485 NTSTATUS status = STATUS_SUCCESS;
1486 LPVOID addr = *addr_ptr;
1487 SIZE_T size = *size_ptr;
1488
1489 TRACE("%p %p %08lx %x\n", process, addr, size, type );
1490
1491 if (process != NtCurrentProcess())
1492 {
1493 apc_call_t call;
1494 apc_result_t result;
1495
1496 memset( &call, 0, sizeof(call) );
1497
1498 call.virtual_free.type = APC_VIRTUAL_FREE;
1499 call.virtual_free.addr = addr;
1500 call.virtual_free.size = size;
1501 call.virtual_free.op_type = type;
1502 status = NTDLL_queue_process_apc( process, &call, &result );
1503 if (status != STATUS_SUCCESS) return status;
1504
1505 if (result.virtual_free.status == STATUS_SUCCESS)
1506 {
1507 *addr_ptr = result.virtual_free.addr;
1508 *size_ptr = result.virtual_free.size;
1509 }
1510 return result.virtual_free.status;
1511 }
1512
1513 /* Fix the parameters */
1514
1515 size = ROUND_SIZE( addr, size );
1516 base = ROUND_ADDR( addr, page_mask );
1517
1518 /* avoid freeing the DOS area when a broken app passes a NULL pointer */
1519 if (!base && !(type & MEM_SYSTEM)) return STATUS_INVALID_PARAMETER;
1520
1521 server_enter_uninterrupted_section( &csVirtual, &sigset );
1522
1523 if (!(view = VIRTUAL_FindView( base )) ||
1524 (base + size > (char *)view->base + view->size) ||
1525 !(view->flags & VFLAG_VALLOC))
1526 {
1527 status = STATUS_INVALID_PARAMETER;
1528 }
1529 else if (type & MEM_SYSTEM)
1530 {
1531 /* return the values that the caller should use to unmap the area */
1532 *addr_ptr = view->base;
1533 if (!wine_mmap_is_in_reserved_area( view->base, view->size )) *size_ptr = view->size;
1534 else *size_ptr = 0; /* make sure we don't munmap anything from a reserved area */
1535 view->flags |= VFLAG_SYSTEM;
1536 delete_view( view );
1537 }
1538 else if (type == MEM_RELEASE)
1539 {
1540 /* Free the pages */
1541
1542 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
1543 else
1544 {
1545 delete_view( view );
1546 *addr_ptr = base;
1547 *size_ptr = size;
1548 }
1549 }
1550 else if (type == MEM_DECOMMIT)
1551 {
1552 status = decommit_pages( view, base - (char *)view->base, size );
1553 if (status == STATUS_SUCCESS)
1554 {
1555 *addr_ptr = base;
1556 *size_ptr = size;
1557 }
1558 }
1559 else
1560 {
1561 WARN("called with wrong free type flags (%08x) !\n", type);
1562 status = STATUS_INVALID_PARAMETER;
1563 }
1564
1565 server_leave_uninterrupted_section( &csVirtual, &sigset );
1566 return status;
1567 }
1568
1569
1570 /***********************************************************************
1571 * NtProtectVirtualMemory (NTDLL.@)
1572 * ZwProtectVirtualMemory (NTDLL.@)
1573 */
1574 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr,
1575 ULONG new_prot, ULONG *old_prot )
1576 {
1577 FILE_VIEW *view;
1578 sigset_t sigset;
1579 NTSTATUS status = STATUS_SUCCESS;
1580 char *base;
1581 UINT i;
1582 BYTE vprot, *p;
1583 ULONG prot;
1584 SIZE_T size = *size_ptr;
1585 LPVOID addr = *addr_ptr;
1586
1587 TRACE("%p %p %08lx %08x\n", process, addr, size, new_prot );
1588
1589 if (process != NtCurrentProcess())
1590 {
1591 apc_call_t call;
1592 apc_result_t result;
1593
1594 memset( &call, 0, sizeof(call) );
1595
1596 call.virtual_protect.type = APC_VIRTUAL_PROTECT;
1597 call.virtual_protect.addr = addr;
1598 call.virtual_protect.size = size;
1599 call.virtual_protect.prot = new_prot;
1600 status = NTDLL_queue_process_apc( process, &call, &result );
1601 if (status != STATUS_SUCCESS) return status;
1602
1603 if (result.virtual_protect.status == STATUS_SUCCESS)
1604 {
1605 *addr_ptr = result.virtual_protect.addr;
1606 *size_ptr = result.virtual_protect.size;
1607 if (old_prot) *old_prot = result.virtual_protect.prot;
1608 }
1609 return result.virtual_protect.status;
1610 }
1611
1612 /* Fix the parameters */
1613
1614 size = ROUND_SIZE( addr, size );
1615 base = ROUND_ADDR( addr, page_mask );
1616
1617 server_enter_uninterrupted_section( &csVirtual, &sigset );
1618
1619 if (!(view = VIRTUAL_FindView( base )) || (base + size > (char *)view->base + view->size))
1620 {
1621 status = STATUS_INVALID_PARAMETER;
1622 }
1623 else
1624 {
1625 /* Make sure all the pages are committed */
1626
1627 p = view->prot + ((base - (char *)view->base) >> page_shift);
1628 prot = VIRTUAL_GetWin32Prot( *p );
1629 for (i = size >> page_shift; i; i--, p++)
1630 {
1631 if (!(*p & VPROT_COMMITTED))
1632 {
1633 status = STATUS_NOT_COMMITTED;
1634 break;
1635 }
1636 }
1637 if (!i)
1638 {
1639 if (old_prot) *old_prot = prot;
1640 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1641 if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1642 }
1643 }
1644 server_leave_uninterrupted_section( &csVirtual, &sigset );
1645
1646 if (status == STATUS_SUCCESS)
1647 {
1648 *addr_ptr = base;
1649 *size_ptr = size;
1650 }
1651 return status;
1652 }
1653
1654 #define UNIMPLEMENTED_INFO_CLASS(c) \
1655 case c: \
1656 FIXME("(process=%p,addr=%p) Unimplemented information class: " #c "\n", process, addr); \
1657 return STATUS_INVALID_INFO_CLASS
1658
1659 /***********************************************************************
1660 * NtQueryVirtualMemory (NTDLL.@)
1661 * ZwQueryVirtualMemory (NTDLL.@)
1662 */
1663 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
1664 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
1665 SIZE_T len, SIZE_T *res_len )
1666 {
1667 FILE_VIEW *view;
1668 char *base, *alloc_base = 0;
1669 struct list *ptr;
1670 SIZE_T size = 0;
1671 MEMORY_BASIC_INFORMATION *info = buffer;
1672 sigset_t sigset;
1673
1674 if (info_class != MemoryBasicInformation)
1675 {
1676 switch(info_class)
1677 {
1678 UNIMPLEMENTED_INFO_CLASS(MemoryWorkingSetList);
1679 UNIMPLEMENTED_INFO_CLASS(MemorySectionName);
1680 UNIMPLEMENTED_INFO_CLASS(MemoryBasicVlmInformation);
1681
1682 default:
1683 FIXME("(%p,%p,info_class=%d,%p,%ld,%p) Unknown information class\n",
1684 process, addr, info_class, buffer, len, res_len);
1685 return STATUS_INVALID_INFO_CLASS;
1686 }
1687 }
1688 if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
1689 return STATUS_WORKING_SET_LIMIT_RANGE;
1690
1691 if (process != NtCurrentProcess())
1692 {
1693 NTSTATUS status;
1694 apc_call_t call;
1695 apc_result_t result;
1696
1697 memset( &call, 0, sizeof(call) );
1698
1699 call.virtual_query.type = APC_VIRTUAL_QUERY;
1700 call.virtual_query.addr = addr;
1701 status = NTDLL_queue_process_apc( process, &call, &result );
1702 if (status != STATUS_SUCCESS) return status;
1703
1704 if (result.virtual_query.status == STATUS_SUCCESS)
1705 {
1706 info->BaseAddress = result.virtual_query.base;
1707 info->AllocationBase = result.virtual_query.alloc_base;
1708 info->RegionSize = result.virtual_query.size;
1709 info->State = result.virtual_query.state;
1710 info->Protect = result.virtual_query.prot;
1711 info->AllocationProtect = result.virtual_query.alloc_prot;
1712 info->Type = result.virtual_query.alloc_type;
1713 if (res_len) *res_len = sizeof(*info);
1714 }
1715 return result.virtual_query.status;
1716 }
1717
1718 base = ROUND_ADDR( addr, page_mask );
1719
1720 /* Find the view containing the address */
1721
1722 server_enter_uninterrupted_section( &csVirtual, &sigset );
1723 ptr = list_head( &views_list );
1724 for (;;)
1725 {
1726 if (!ptr)
1727 {
1728 /* make the address space end at the user limit, except if
1729 * the last view was mapped beyond that */
1730 if (alloc_base <= (char *)user_space_limit)
1731 {
1732 if (user_space_limit && base >= (char *)user_space_limit)
1733 {
1734 server_leave_uninterrupted_section( &csVirtual, &sigset );
1735 return STATUS_WORKING_SET_LIMIT_RANGE;
1736 }
1737 size = (char *)user_space_limit - alloc_base;
1738 }
1739 else size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1740 view = NULL;
1741 break;
1742 }
1743 view = LIST_ENTRY( ptr, struct file_view, entry );
1744 if ((char *)view->base > base)
1745 {
1746 size = (char *)view->base - alloc_base;
1747 view = NULL;
1748 break;
1749 }
1750 if ((char *)view->base + view->size > base)
1751 {
1752 alloc_base = view->base;
1753 size = view->size;
1754 break;
1755 }
1756 alloc_base = (char *)view->base + view->size;
1757 ptr = list_next( &views_list, ptr );
1758 }
1759
1760 /* Fill the info structure */
1761
1762 if (!view)
1763 {
1764 info->State = MEM_FREE;
1765 info->Protect = PAGE_NOACCESS;
1766 info->AllocationBase = 0;
1767 info->AllocationProtect = 0;
1768 info->Type = 0;
1769 }
1770 else
1771 {
1772 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1773 info->State = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
1774 info->Protect = VIRTUAL_GetWin32Prot( vprot );
1775 info->AllocationBase = alloc_base;
1776 info->AllocationProtect = VIRTUAL_GetWin32Prot( view->protect );
1777 if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
1778 else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
1779 else info->Type = MEM_MAPPED;
1780 for (size = base - alloc_base; size < view->size; size += page_size)
1781 if (view->prot[size >> page_shift] != vprot) break;
1782 }
1783 server_leave_uninterrupted_section( &csVirtual, &sigset );
1784
1785 info->BaseAddress = base;
1786 info->RegionSize = size - (base - alloc_base);
1787 if (res_len) *res_len = sizeof(*info);
1788 return STATUS_SUCCESS;
1789 }
1790
1791
1792 /***********************************************************************
1793 * NtLockVirtualMemory (NTDLL.@)
1794 * ZwLockVirtualMemory (NTDLL.@)
1795 */
1796 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1797 {
1798 NTSTATUS status = STATUS_SUCCESS;
1799
1800 if (process != NtCurrentProcess())
1801 {
1802 apc_call_t call;
1803 apc_result_t result;
1804
1805 memset( &call, 0, sizeof(call) );
1806
1807 call.virtual_lock.type = APC_VIRTUAL_LOCK;
1808 call.virtual_lock.addr = *addr;
1809 call.virtual_lock.size = *size;
1810 status = NTDLL_queue_process_apc( process, &call, &result );
1811 if (status != STATUS_SUCCESS) return status;
1812
1813 if (result.virtual_lock.status == STATUS_SUCCESS)
1814 {
1815 *addr = result.virtual_lock.addr;
1816 *size = result.virtual_lock.size;
1817 }
1818 return result.virtual_lock.status;
1819 }
1820
1821 *size = ROUND_SIZE( *addr, *size );
1822 *addr = ROUND_ADDR( *addr, page_mask );
1823
1824 if (mlock( *addr, *size )) status = STATUS_ACCESS_DENIED;
1825 return status;
1826 }
1827
1828
1829 /***********************************************************************
1830 * NtUnlockVirtualMemory (NTDLL.@)
1831 * ZwUnlockVirtualMemory (NTDLL.@)
1832 */
1833 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1834 {
1835 NTSTATUS status = STATUS_SUCCESS;
1836
1837 if (process != NtCurrentProcess())
1838 {
1839 apc_call_t call;
1840 apc_result_t result;
1841
1842 memset( &call, 0, sizeof(call) );
1843
1844 call.virtual_unlock.type = APC_VIRTUAL_UNLOCK;
1845 call.virtual_unlock.addr = *addr;
1846 call.virtual_unlock.size = *size;
1847 status = NTDLL_queue_process_apc( process, &call, &result );
1848 if (status != STATUS_SUCCESS) return status;
1849
1850 if (result.virtual_unlock.status == STATUS_SUCCESS)
1851 {
1852 *addr = result.virtual_unlock.addr;
1853 *size = result.virtual_unlock.size;
1854 }
1855 return result.virtual_unlock.status;
1856 }
1857
1858 *size = ROUND_SIZE( *addr, *size );
1859 *addr = ROUND_ADDR( *addr, page_mask );
1860
1861 if (munlock( *addr, *size )) status = STATUS_ACCESS_DENIED;
1862 return status;
1863 }
1864
1865
1866 /***********************************************************************
1867 * NtCreateSection (NTDLL.@)
1868 * ZwCreateSection (NTDLL.@)
1869 */
1870 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
1871 const LARGE_INTEGER *size, ULONG protect,
1872 ULONG sec_flags, HANDLE file )
1873 {
1874 NTSTATUS ret;
1875 BYTE vprot;
1876 DWORD len = (attr && attr->ObjectName) ? attr->ObjectName->Length : 0;
1877 struct security_descriptor *sd = NULL;
1878 struct object_attributes objattr;
1879
1880 /* Check parameters */
1881
1882 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1883
1884 objattr.rootdir = attr ? attr->RootDirectory : 0;
1885 objattr.sd_len = 0;
1886 objattr.name_len = len;
1887 if (attr)
1888 {
1889 ret = NTDLL_create_struct_sd( attr->SecurityDescriptor, &sd, &objattr.sd_len );
1890 if (ret != STATUS_SUCCESS) return ret;
1891 }
1892
1893 vprot = VIRTUAL_GetProt( protect );
1894 if (sec_flags & SEC_RESERVE)
1895 {
1896 if (file) return STATUS_INVALID_PARAMETER;
1897 }
1898 else vprot |= VPROT_COMMITTED;
1899 if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1900 if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
1901
1902 /* Create the server object */
1903
1904 SERVER_START_REQ( create_mapping )
1905 {
1906 req->access = access;
1907 req->attributes = (attr) ? attr->Attributes : 0;
1908 req->file_handle = file;
1909 req->size = size ? size->QuadPart : 0;
1910 req->protect = vprot;
1911 wine_server_add_data( req, &objattr, sizeof(objattr) );
1912 if (objattr.sd_len) wine_server_add_data( req, sd, objattr.sd_len );
1913 if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
1914 ret = wine_server_call( req );
1915 *handle = reply->handle;
1916 }
1917 SERVER_END_REQ;
1918
1919 NTDLL_free_struct_sd( sd );
1920
1921 return ret;
1922 }
1923
1924
1925 /***********************************************************************
1926 * NtOpenSection (NTDLL.@)
1927 * ZwOpenSection (NTDLL.@)
1928 */
1929 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
1930 {
1931 NTSTATUS ret;
1932 DWORD len = attr->ObjectName->Length;
1933
1934 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1935
1936 SERVER_START_REQ( open_mapping )
1937 {
1938 req->access = access;
1939 req->attributes = (attr) ? attr->Attributes : 0;
1940 req->rootdir = attr ? attr->RootDirectory : 0;
1941 wine_server_add_data( req, attr->ObjectName->Buffer, len );
1942 if (!(ret = wine_server_call( req ))) *handle = reply->handle;
1943 }
1944 SERVER_END_REQ;
1945 return ret;
1946 }
1947
1948
1949 /***********************************************************************
1950 * NtMapViewOfSection (NTDLL.@)
1951 * ZwMapViewOfSection (NTDLL.@)
1952 */
1953 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
1954 SIZE_T commit_size, const LARGE_INTEGER *offset_ptr, SIZE_T *size_ptr,
1955 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
1956 {
1957 NTSTATUS res;
1958 ULONGLONG full_size;
1959 SIZE_T size = 0;
1960 SIZE_T mask = get_mask( zero_bits );
1961 int unix_handle = -1, needs_close;
1962 int prot;
1963 void *base;
1964 struct file_view *view;
1965 DWORD header_size;
1966 HANDLE dup_mapping, shared_file;
1967 LARGE_INTEGER offset;
1968 sigset_t sigset;
1969
1970 offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
1971
1972 TRACE("handle=%p process=%p addr=%p off=%x%08x size=%lx access=%x\n",
1973 handle, process, *addr_ptr, offset.u.HighPart, offset.u.LowPart, size, protect );
1974
1975 /* Check parameters */
1976
1977 if ((offset.u.LowPart & mask) || (*addr_ptr && ((UINT_PTR)*addr_ptr & mask)))
1978 return STATUS_INVALID_PARAMETER;
1979
1980 if (process != NtCurrentProcess())
1981 {
1982 apc_call_t call;
1983 apc_result_t result;
1984
1985 memset( &call, 0, sizeof(call) );
1986
1987 call.map_view.type = APC_MAP_VIEW;
1988 call.map_view.handle = handle;
1989 call.map_view.addr = *addr_ptr;
1990 call.map_view.size = *size_ptr;
1991 call.map_view.offset = offset.QuadPart;
1992 call.map_view.zero_bits = zero_bits;
1993 call.map_view.alloc_type = alloc_type;
1994 call.map_view.prot = protect;
1995 res = NTDLL_queue_process_apc( process, &call, &result );
1996 if (res != STATUS_SUCCESS) return res;
1997
1998 if (result.map_view.status == STATUS_SUCCESS)
1999 {
2000 *addr_ptr = result.map_view.addr;
2001 *size_ptr = result.map_view.size;
2002 }
2003 return result.map_view.status;
2004 }
2005
2006 SERVER_START_REQ( get_mapping_info )
2007 {
2008 req->handle = handle;
2009 res = wine_server_call( req );
2010 prot = reply->protect;
2011 base = reply->base;
2012 full_size = reply->size;
2013 header_size = reply->header_size;
2014 dup_mapping = reply->mapping;
2015 shared_file = reply->shared_file;
2016 }
2017 SERVER_END_REQ;
2018 if (res) return res;
2019
2020 size = full_size;
2021 if (sizeof(size) < sizeof(full_size) && (size != full_size))
2022 ERR( "Sizes larger than 4Gb (%x%08x) not supported on this platform\n",
2023 (DWORD)(full_size >> 32), (DWORD)full_size );
2024
2025 if ((res = server_get_unix_fd( handle, 0, &unix_handle, &needs_close, NULL, NULL ))) goto done;
2026
2027 if (prot & VPROT_IMAGE)
2028 {
2029 if (shared_file)
2030 {
2031 int shared_fd, shared_needs_close;
2032
2033 if ((res = server_get_unix_fd( shared_file, FILE_READ_DATA|FILE_WRITE_DATA,
2034 &shared_fd, &shared_needs_close, NULL, NULL ))) goto done;
2035 res = map_image( handle, unix_handle, base, size, mask, header_size,
2036 shared_fd, dup_mapping, addr_ptr );
2037 if (shared_needs_close) close( shared_fd );
2038 NtClose( shared_file );
2039 }
2040 else
2041 {
2042 res = map_image( handle, unix_handle, base, size, mask, header_size,
2043 -1, dup_mapping, addr_ptr );
2044 }
2045 if (needs_close) close( unix_handle );
2046 if (!res) *size_ptr = size;
2047 return res;
2048 }
2049
2050 if ((offset.QuadPart >= size) || (*size_ptr > size - offset.QuadPart))
2051 {
2052 res = STATUS_INVALID_PARAMETER;
2053 goto done;
2054 }
2055 if (*size_ptr) size = ROUND_SIZE( offset.u.LowPart, *size_ptr );
2056 else size = size - offset.QuadPart;
2057
2058 switch(protect)
2059 {
2060 case PAGE_NOACCESS:
2061 break;
2062 case PAGE_READWRITE:
2063 case PAGE_EXECUTE_READWRITE:
2064 if (!(prot & VPROT_WRITE))
2065 {
2066 res = STATUS_INVALID_PARAMETER;
2067 goto done;
2068 }
2069 /* fall through */
2070 case PAGE_READONLY:
2071 case PAGE_WRITECOPY:
2072 case PAGE_EXECUTE:
2073 case PAGE_EXECUTE_READ:
2074 case PAGE_EXECUTE_WRITECOPY:
2075 if (prot & VPROT_READ) break;
2076 /* fall through */
2077 default:
2078 res = STATUS_INVALID_PARAMETER;
2079 goto done;
2080 }
2081
2082 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
2083 * which has a view of this mapping commits some pages, they will
2084 * appear committed in all other processes, which have the same
2085 * view created. Since we don't support this yet, we create the
2086 * whole mapping committed.
2087 */
2088 prot |= VPROT_COMMITTED;
2089
2090 /* Reserve a properly aligned area */
2091
2092 server_enter_uninterrupted_section( &csVirtual, &sigset );
2093
2094 res = map_view( &view, *addr_ptr, size, mask, FALSE, prot );
2095 if (res)
2096 {
2097 server_leave_uninterrupted_section( &csVirtual, &sigset );
2098 goto done;
2099 }
2100
2101 /* Map the file */
2102
2103 TRACE("handle=%p size=%lx offset=%x%08x\n",
2104 handle, size, offset.u.HighPart, offset.u.LowPart );
2105
2106 res = map_file_into_view( view, unix_handle, 0, size, offset.QuadPart, prot, !dup_mapping );
2107 if (res == STATUS_SUCCESS)
2108 {
2109 *addr_ptr = view->base;
2110 *size_ptr = size;
2111 view->mapping = dup_mapping;
2112 dup_mapping = 0; /* don't close it */
2113 }
2114 else
2115 {
2116 ERR( "map_file_into_view %p %lx %x%08x failed\n",
2117 view->base, size, offset.u.HighPart, offset.u.LowPart );
2118 delete_view( view );
2119 }
2120
2121 server_leave_uninterrupted_section( &csVirtual, &sigset );
2122
2123 done:
2124 if (dup_mapping) NtClose( dup_mapping );
2125 if (needs_close) close( unix_handle );
2126 return res;
2127 }
2128
2129
2130 /***********************************************************************
2131 * NtUnmapViewOfSection (NTDLL.@)
2132 * ZwUnmapViewOfSection (NTDLL.@)
2133 */
2134 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
2135 {
2136 FILE_VIEW *view;
2137 NTSTATUS status = STATUS_INVALID_PARAMETER;
2138 sigset_t sigset;
2139 void *base = ROUND_ADDR( addr, page_mask );
2140
2141 if (process != NtCurrentProcess())
2142 {
2143 apc_call_t call;
2144 apc_result_t result;
2145
2146 memset( &call, 0, sizeof(call) );
2147
2148 call.unmap_view.type = APC_UNMAP_VIEW;
2149 call.unmap_view.addr = addr;
2150 status = NTDLL_queue_process_apc( process, &call, &result );
2151 if (status == STATUS_SUCCESS) status = result.unmap_view.status;
2152 return status;
2153 }
2154
2155 server_enter_uninterrupted_section( &csVirtual, &sigset );
2156 if ((view = VIRTUAL_FindView( base )) && (base == view->base))
2157 {
2158 delete_view( view );
2159 status = STATUS_SUCCESS;
2160 }
2161 server_leave_uninterrupted_section( &csVirtual, &sigset );
2162 return status;
2163 }
2164
2165
2166 /***********************************************************************
2167 * NtFlushVirtualMemory (NTDLL.@)
2168 * ZwFlushVirtualMemory (NTDLL.@)
2169 */
2170 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
2171 SIZE_T *size_ptr, ULONG unknown )
2172 {
2173 FILE_VIEW *view;
2174 NTSTATUS status = STATUS_SUCCESS;
2175 sigset_t sigset;
2176 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
2177
2178 if (process != NtCurrentProcess())
2179 {
2180 apc_call_t call;
2181 apc_result_t result;
2182
2183 memset( &call, 0, sizeof(call) );
2184
2185 call.virtual_flush.type = APC_VIRTUAL_FLUSH;
2186 call.virtual_flush.addr = addr;
2187 call.virtual_flush.size = *size_ptr;
2188 status = NTDLL_queue_process_apc( process, &call, &result );
2189 if (status != STATUS_SUCCESS) return status;
2190
2191 if (result.virtual_flush.status == STATUS_SUCCESS)
2192 {
2193 *addr_ptr = result.virtual_flush.addr;
2194 *size_ptr = result.virtual_flush.size;
2195 }
2196 return result.virtual_flush.status;
2197 }
2198
2199 server_enter_uninterrupted_section( &csVirtual, &sigset );
2200 if (!(view = VIRTUAL_FindView( addr ))) status = STATUS_INVALID_PARAMETER;
2201 else
2202 {
2203 if (!*size_ptr) *size_ptr = view->size;
2204 *addr_ptr = addr;
2205 if (msync( addr, *size_ptr, MS_SYNC )) status = STATUS_NOT_MAPPED_DATA;
2206 }
2207 server_leave_uninterrupted_section( &csVirtual, &sigset );
2208 return status;
2209 }
2210
2211
2212 /***********************************************************************
2213 * NtReadVirtualMemory (NTDLL.@)
2214 * ZwReadVirtualMemory (NTDLL.@)
2215 */
2216 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
2217 SIZE_T size, SIZE_T *bytes_read )
2218 {
2219 NTSTATUS status;
2220
2221 SERVER_START_REQ( read_process_memory )
2222 {
2223 req->handle = process;
2224 req->addr = (void *)addr;
2225 wine_server_set_reply( req, buffer, size );
2226 if ((status = wine_server_call( req ))) size = 0;
2227 }
2228 SERVER_END_REQ;
2229 if (bytes_read) *bytes_read = size;
2230 return status;
2231 }
2232
2233
2234 /***********************************************************************
2235 * NtWriteVirtualMemory (NTDLL.@)
2236 * ZwWriteVirtualMemory (NTDLL.@)
2237 */
2238 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
2239 SIZE_T size, SIZE_T *bytes_written )
2240 {
2241 NTSTATUS status;
2242
2243 SERVER_START_REQ( write_process_memory )
2244 {
2245 req->handle = process;
2246 req->addr = addr;
2247 wine_server_add_data( req, buffer, size );
2248 if ((status = wine_server_call( req ))) size = 0;
2249 }
2250 SERVER_END_REQ;
2251 if (bytes_written) *bytes_written = size;
2252 return status;
2253 }
2254
2255
2256 /***********************************************************************
2257 * NtAreMappedFilesTheSame (NTDLL.@)
2258 * ZwAreMappedFilesTheSame (NTDLL.@)
2259 */
2260 NTSTATUS WINAPI NtAreMappedFilesTheSame(PVOID addr1, PVOID addr2)
2261 {
2262 TRACE("%p %p\n", addr1, addr2);
2263
2264 return STATUS_NOT_SAME_DEVICE;
2265 }
Windows API implementation