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advapi32: Use exponential backoff when waiting for a service to start.
[wine/multimedia.git] / dlls / ntdll / virtual.c
blobb5e236f0f7749c2fe00fd3115f997f6ea0e9daf9
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) 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, HANDLE dup_mapping, 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 sigset_t sigset;
947 struct stat st;
948 struct file_view *view = NULL;
949 char *ptr, *header_end;
950
951 /* zero-map the whole range */
952
953 server_enter_uninterrupted_section( &csVirtual, &sigset );
954
955 if (base >= (char *)0x110000) /* make sure the DOS area remains free */
956 status = map_view( &view, base, total_size, mask, FALSE,
957 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
958
959 if (status == STATUS_CONFLICTING_ADDRESSES)
960 status = map_view( &view, NULL, total_size, mask, FALSE,
961 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
962
963 if (status != STATUS_SUCCESS) goto error;
964
965 ptr = view->base;
966 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
967
968 /* map the header */
969
970 if (fstat( fd, &st ) == -1)
971 {
972 status = FILE_GetNtStatus();
973 goto error;
974 }
975 status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
976 if (!st.st_size) goto error;
977 header_size = min( header_size, st.st_size );
978 if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
979 !dup_mapping ) != STATUS_SUCCESS) goto error;
980 dos = (IMAGE_DOS_HEADER *)ptr;
981 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
982 header_end = ptr + ROUND_SIZE( 0, header_size );
983 memset( ptr + header_size, 0, header_end - (ptr + header_size) );
984 if ((char *)(nt + 1) > header_end) goto error;
985 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
986 if ((char *)(sec + nt->FileHeader.NumberOfSections) > header_end) goto error;
987
988 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
989 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
990
991 /* check the architecture */
992
993 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
994 {
995 MESSAGE("Trying to load PE image for unsupported architecture (");
996 switch (nt->FileHeader.Machine)
997 {
998 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
999 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
1000 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
1001 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
1002 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
1003 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
1004 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
1005 case IMAGE_FILE_MACHINE_IA64: MESSAGE("IA-64"); break;
1006 case IMAGE_FILE_MACHINE_ALPHA64: MESSAGE("Alpha-64"); break;
1007 case IMAGE_FILE_MACHINE_AMD64: MESSAGE("AMD-64"); break;
1008 case IMAGE_FILE_MACHINE_ARM: MESSAGE("ARM"); break;
1009 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
1010 }
1011 MESSAGE(")\n");
1012 goto error;
1013 }
1014
1015 /* check for non page-aligned binary */
1016
1017 if (nt->OptionalHeader.SectionAlignment <= page_mask)
1018 {
1019 /* unaligned sections, this happens for native subsystem binaries */
1020 /* in that case Windows simply maps in the whole file */
1021
1022 if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ,
1023 !dup_mapping ) != STATUS_SUCCESS) goto error;
1024
1025 /* check that all sections are loaded at the right offset */
1026 if (nt->OptionalHeader.FileAlignment != nt->OptionalHeader.SectionAlignment) goto error;
1027 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
1028 {
1029 if (sec[i].VirtualAddress != sec[i].PointerToRawData)
1030 goto error; /* Windows refuses to load in that case too */
1031 }
1032
1033 /* set the image protections */
1034 VIRTUAL_SetProt( view, ptr, total_size,
1035 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
1036
1037 /* perform relocations if necessary */
1038 /* FIXME: not 100% compatible, Windows doesn't do this for non page-aligned binaries */
1039 if (ptr != base)
1040 {
1041 const IMAGE_DATA_DIRECTORY *relocs;
1042 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1043 if (relocs->VirtualAddress && relocs->Size)
1044 do_relocations( ptr, relocs, ptr - base, total_size );
1045 }
1046
1047 goto done;
1048 }
1049
1050
1051 /* map all the sections */
1052
1053 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1054 {
1055 static const SIZE_T sector_align = 0x1ff;
1056 SIZE_T map_size, file_start, file_size, end;
1057
1058 if (!sec->Misc.VirtualSize)
1059 map_size = ROUND_SIZE( 0, sec->SizeOfRawData );
1060 else
1061 map_size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
1062
1063 /* file positions are rounded to sector boundaries regardless of OptionalHeader.FileAlignment */
1064 file_start = sec->PointerToRawData & ~sector_align;
1065 file_size = (sec->SizeOfRawData + (sec->PointerToRawData & sector_align) + sector_align) & ~sector_align;
1066 if (file_size > map_size) file_size = map_size;
1067
1068 /* a few sanity checks */
1069 end = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, map_size );
1070 if (sec->VirtualAddress > total_size || end > total_size || end < sec->VirtualAddress)
1071 {
1072 WARN_(module)( "Section %.8s too large (%x+%lx/%lx)\n",
1073 sec->Name, sec->VirtualAddress, map_size, total_size );
1074 goto error;
1075 }
1076
1077 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
1078 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
1079 {
1080 TRACE_(module)( "mapping shared section %.8s at %p off %x (%x) size %lx (%lx) flags %x\n",
1081 sec->Name, ptr + sec->VirtualAddress,
1082 sec->PointerToRawData, (int)pos, file_size, map_size,
1083 sec->Characteristics );
1084 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, map_size, pos,
1085 VPROT_COMMITTED | VPROT_READ | VPROT_WRITE,
1086 FALSE ) != STATUS_SUCCESS)
1087 {
1088 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
1089 goto error;
1090 }
1091
1092 /* check if the import directory falls inside this section */
1093 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
1094 imports->VirtualAddress < sec->VirtualAddress + map_size)
1095 {
1096 UINT_PTR base = imports->VirtualAddress & ~page_mask;
1097 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
1098 if (end > sec->VirtualAddress + map_size) end = sec->VirtualAddress + map_size;
1099 if (end > base)
1100 map_file_into_view( view, shared_fd, base, end - base,
1101 pos + (base - sec->VirtualAddress),
1102 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1103 FALSE );
1104 }
1105 pos += map_size;
1106 continue;
1107 }
1108
1109 TRACE_(module)( "mapping section %.8s at %p off %x size %x virt %x flags %x\n",
1110 sec->Name, ptr + sec->VirtualAddress,
1111 sec->PointerToRawData, sec->SizeOfRawData,
1112 sec->Misc.VirtualSize, sec->Characteristics );
1113
1114 if (!sec->PointerToRawData || !file_size) continue;
1115
1116 /* Note: if the section is not aligned properly map_file_into_view will magically
1117 * fall back to read(), so we don't need to check anything here.
1118 */
1119 end = file_start + file_size;
1120 if (sec->PointerToRawData >= st.st_size ||
1121 end > ((st.st_size + sector_align) & ~sector_align) ||
1122 end < file_start ||
1123 map_file_into_view( view, fd, sec->VirtualAddress, file_size, file_start,
1124 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1125 !dup_mapping ) != STATUS_SUCCESS)
1126 {
1127 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
1128 goto error;
1129 }
1130
1131 if (file_size & page_mask)
1132 {
1133 end = ROUND_SIZE( 0, file_size );
1134 if (end > map_size) end = map_size;
1135 TRACE_(module)("clearing %p - %p\n",
1136 ptr + sec->VirtualAddress + file_size,
1137 ptr + sec->VirtualAddress + end );
1138 memset( ptr + sec->VirtualAddress + file_size, 0, end - file_size );
1139 }
1140 }
1141
1142
1143 /* perform base relocation, if necessary */
1144
1145 if (ptr != base)
1146 {
1147 const IMAGE_DATA_DIRECTORY *relocs;
1148
1149 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1150 if (nt->FileHeader.Characteristics & IMAGE_FILE_RELOCS_STRIPPED)
1151 {
1152 WARN( "Need to relocate module from addr %lx, but there are no relocation records\n",
1153 (ULONG_PTR)nt->OptionalHeader.ImageBase );
1154 status = STATUS_CONFLICTING_ADDRESSES;
1155 goto error;
1156 }
1157
1158 /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
1159 * really make sure that the *new* base address is also > 2GB.
1160 * Some DLLs really check the MSB of the module handle :-/
1161 */
1162 if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((ULONG_PTR)base & 0x80000000))
1163 ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
1164
1165 if (!do_relocations( ptr, relocs, ptr - base, total_size ))
1166 {
1167 goto error;
1168 }
1169 }
1170
1171 /* set the image protections */
1172
1173 VIRTUAL_SetProt( view, ptr, ROUND_SIZE( 0, header_size ), VPROT_COMMITTED | VPROT_READ );
1174
1175 sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
1176 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1177 {
1178 SIZE_T size;
1179 BYTE vprot = VPROT_COMMITTED;
1180
1181 if (sec->Misc.VirtualSize)
1182 size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
1183 else
1184 size = ROUND_SIZE( sec->VirtualAddress, sec->SizeOfRawData );
1185
1186 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
1187 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_READ|VPROT_WRITECOPY;
1188 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
1189
1190 /* Dumb game crack lets the AOEP point into a data section. Adjust. */
1191 if ((nt->OptionalHeader.AddressOfEntryPoint >= sec->VirtualAddress) &&
1192 (nt->OptionalHeader.AddressOfEntryPoint < sec->VirtualAddress + size))
1193 vprot |= VPROT_EXEC;
1194
1195 VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
1196 }
1197
1198 done:
1199 view->mapping = dup_mapping;
1200 server_leave_uninterrupted_section( &csVirtual, &sigset );
1201
1202 *addr_ptr = ptr;
1203 return STATUS_SUCCESS;
1204
1205 error:
1206 if (view) delete_view( view );
1207 server_leave_uninterrupted_section( &csVirtual, &sigset );
1208 if (dup_mapping) NtClose( dup_mapping );
1209 return status;
1210 }
1211
1212
1213 /***********************************************************************
1214 * virtual_init
1215 */
1216 void virtual_init(void)
1217 {
1218 const char *preload;
1219 #ifndef page_mask
1220 page_size = getpagesize();
1221 page_mask = page_size - 1;
1222 /* Make sure we have a power of 2 */
1223 assert( !(page_size & page_mask) );
1224 page_shift = 0;
1225 while ((1 << page_shift) != page_size) page_shift++;
1226 #endif /* page_mask */
1227 if ((preload = getenv("WINEPRELOADRESERVE")))
1228 {
1229 unsigned long start, end;
1230 if (sscanf( preload, "%lx-%lx", &start, &end ) == 2)
1231 {
1232 preload_reserve_start = (void *)start;
1233 preload_reserve_end = (void *)end;
1234 }
1235 }
1236 }
1237
1238
1239 /***********************************************************************
1240 * virtual_init_threading
1241 */
1242 void virtual_init_threading(void)
1243 {
1244 use_locks = 1;
1245 }
1246
1247
1248 /***********************************************************************
1249 * VIRTUAL_HandleFault
1250 */
1251 NTSTATUS VIRTUAL_HandleFault( LPCVOID addr )
1252 {
1253 FILE_VIEW *view;
1254 NTSTATUS ret = STATUS_ACCESS_VIOLATION;
1255 sigset_t sigset;
1256
1257 server_enter_uninterrupted_section( &csVirtual, &sigset );
1258 if ((view = VIRTUAL_FindView( addr )))
1259 {
1260 void *page = ROUND_ADDR( addr, page_mask );
1261 BYTE vprot = view->prot[((const char *)page - (const char *)view->base) >> page_shift];
1262 if (vprot & VPROT_GUARD)
1263 {
1264 VIRTUAL_SetProt( view, page, page_size, vprot & ~VPROT_GUARD );
1265 ret = STATUS_GUARD_PAGE_VIOLATION;
1266 }
1267 }
1268 server_leave_uninterrupted_section( &csVirtual, &sigset );
1269 return ret;
1270 }
1271
1272
1273 /***********************************************************************
1274 * VIRTUAL_SetForceExec
1275 *
1276 * Whether to force exec prot on all views.
1277 */
1278 void VIRTUAL_SetForceExec( BOOL enable )
1279 {
1280 struct file_view *view;
1281 sigset_t sigset;
1282
1283 server_enter_uninterrupted_section( &csVirtual, &sigset );
1284 if (!force_exec_prot != !enable) /* change all existing views */
1285 {
1286 force_exec_prot = enable;
1287
1288 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
1289 {
1290 UINT i, count;
1291 int unix_prot;
1292 char *addr = view->base;
1293 BYTE prot = view->prot[0];
1294
1295 for (count = i = 1; i < view->size >> page_shift; i++, count++)
1296 {
1297 if (view->prot[i] == prot) continue;
1298 unix_prot = VIRTUAL_GetUnixProt( prot );
1299 if ((unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
1300 {
1301 TRACE( "%s exec prot for %p-%p\n",
1302 force_exec_prot ? "enabling" : "disabling",
1303 addr, addr + (count << page_shift) - 1 );
1304 mprotect( addr, count << page_shift,
1305 unix_prot | (force_exec_prot ? PROT_EXEC : 0) );
1306 }
1307 addr += (count << page_shift);
1308 prot = view->prot[i];
1309 count = 0;
1310 }
1311 if (count)
1312 {
1313 unix_prot = VIRTUAL_GetUnixProt( prot );
1314 if ((unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
1315 {
1316 TRACE( "%s exec prot for %p-%p\n",
1317 force_exec_prot ? "enabling" : "disabling",
1318 addr, addr + (count << page_shift) - 1 );
1319 mprotect( addr, count << page_shift,
1320 unix_prot | (force_exec_prot ? PROT_EXEC : 0) );
1321 }
1322 }
1323 }
1324 }
1325 server_leave_uninterrupted_section( &csVirtual, &sigset );
1326 }
1327
1328
1329 /***********************************************************************
1330 * VIRTUAL_UseLargeAddressSpace
1331 *
1332 * Increase the address space size for apps that support it.
1333 */
1334 void VIRTUAL_UseLargeAddressSpace(void)
1335 {
1336 /* no large address space on win9x */
1337 if (NtCurrentTeb()->Peb->OSPlatformId != VER_PLATFORM_WIN32_NT) return;
1338 user_space_limit = ADDRESS_SPACE_LIMIT;
1339 }
1340
1341
1342 /***********************************************************************
1343 * NtAllocateVirtualMemory (NTDLL.@)
1344 * ZwAllocateVirtualMemory (NTDLL.@)
1345 */
1346 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
1347 SIZE_T *size_ptr, ULONG type, ULONG protect )
1348 {
1349 void *base;
1350 BYTE vprot;
1351 SIZE_T size = *size_ptr;
1352 SIZE_T mask = get_mask( zero_bits );
1353 NTSTATUS status = STATUS_SUCCESS;
1354 struct file_view *view;
1355 sigset_t sigset;
1356
1357 TRACE("%p %p %08lx %x %08x\n", process, *ret, size, type, protect );
1358
1359 if (!size) return STATUS_INVALID_PARAMETER;
1360
1361 if (process != NtCurrentProcess())
1362 {
1363 apc_call_t call;
1364 apc_result_t result;
1365
1366 memset( &call, 0, sizeof(call) );
1367
1368 call.virtual_alloc.type = APC_VIRTUAL_ALLOC;
1369 call.virtual_alloc.addr = *ret;
1370 call.virtual_alloc.size = *size_ptr;
1371 call.virtual_alloc.zero_bits = zero_bits;
1372 call.virtual_alloc.op_type = type;
1373 call.virtual_alloc.prot = protect;
1374 status = NTDLL_queue_process_apc( process, &call, &result );
1375 if (status != STATUS_SUCCESS) return status;
1376
1377 if (result.virtual_alloc.status == STATUS_SUCCESS)
1378 {
1379 *ret = result.virtual_alloc.addr;
1380 *size_ptr = result.virtual_alloc.size;
1381 }
1382 return result.virtual_alloc.status;
1383 }
1384
1385 /* Round parameters to a page boundary */
1386
1387 if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
1388
1389 if (*ret)
1390 {
1391 if (type & MEM_RESERVE) /* Round down to 64k boundary */
1392 base = ROUND_ADDR( *ret, mask );
1393 else
1394 base = ROUND_ADDR( *ret, page_mask );
1395 size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1396
1397 /* disallow low 64k, wrap-around and kernel space */
1398 if (((char *)base < (char *)0x10000) ||
1399 ((char *)base + size < (char *)base) ||
1400 is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
1401 return STATUS_INVALID_PARAMETER;
1402 }
1403 else
1404 {
1405 base = NULL;
1406 size = (size + page_mask) & ~page_mask;
1407 }
1408
1409 /* Compute the alloc type flags */
1410
1411 if (!(type & MEM_SYSTEM))
1412 {
1413 if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
1414 (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_TOP_DOWN | MEM_WRITE_WATCH | MEM_RESET)))
1415 {
1416 WARN("called with wrong alloc type flags (%08x) !\n", type);
1417 return STATUS_INVALID_PARAMETER;
1418 }
1419 if (type & MEM_WRITE_WATCH)
1420 {
1421 FIXME("MEM_WRITE_WATCH type not supported\n");
1422 return STATUS_NOT_SUPPORTED;
1423 }
1424 }
1425 vprot = VIRTUAL_GetProt( protect );
1426 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
1427
1428 /* Reserve the memory */
1429
1430 if (use_locks) server_enter_uninterrupted_section( &csVirtual, &sigset );
1431
1432 if (type & MEM_SYSTEM)
1433 {
1434 if (type & MEM_IMAGE) vprot |= VPROT_IMAGE;
1435 status = create_view( &view, base, size, vprot | VPROT_COMMITTED );
1436 if (status == STATUS_SUCCESS)
1437 {
1438 view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
1439 base = view->base;
1440 }
1441 }
1442 else if ((type & MEM_RESERVE) || !base)
1443 {
1444 status = map_view( &view, base, size, mask, type & MEM_TOP_DOWN, vprot );
1445 if (status == STATUS_SUCCESS)
1446 {
1447 view->flags |= VFLAG_VALLOC;
1448 base = view->base;
1449 }
1450 }
1451 else /* commit the pages */
1452 {
1453 if (!(view = VIRTUAL_FindView( base )) ||
1454 ((char *)base + size > (char *)view->base + view->size)) status = STATUS_NOT_MAPPED_VIEW;
1455 else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1456 }
1457
1458 if (use_locks) server_leave_uninterrupted_section( &csVirtual, &sigset );
1459
1460 if (status == STATUS_SUCCESS)
1461 {
1462 *ret = base;
1463 *size_ptr = size;
1464 }
1465 return status;
1466 }
1467
1468
1469 /***********************************************************************
1470 * NtFreeVirtualMemory (NTDLL.@)
1471 * ZwFreeVirtualMemory (NTDLL.@)
1472 */
1473 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr, ULONG type )
1474 {
1475 FILE_VIEW *view;
1476 char *base;
1477 sigset_t sigset;
1478 NTSTATUS status = STATUS_SUCCESS;
1479 LPVOID addr = *addr_ptr;
1480 SIZE_T size = *size_ptr;
1481
1482 TRACE("%p %p %08lx %x\n", process, addr, size, type );
1483
1484 if (process != NtCurrentProcess())
1485 {
1486 apc_call_t call;
1487 apc_result_t result;
1488
1489 memset( &call, 0, sizeof(call) );
1490
1491 call.virtual_free.type = APC_VIRTUAL_FREE;
1492 call.virtual_free.addr = addr;
1493 call.virtual_free.size = size;
1494 call.virtual_free.op_type = type;
1495 status = NTDLL_queue_process_apc( process, &call, &result );
1496 if (status != STATUS_SUCCESS) return status;
1497
1498 if (result.virtual_free.status == STATUS_SUCCESS)
1499 {
1500 *addr_ptr = result.virtual_free.addr;
1501 *size_ptr = result.virtual_free.size;
1502 }
1503 return result.virtual_free.status;
1504 }
1505
1506 /* Fix the parameters */
1507
1508 size = ROUND_SIZE( addr, size );
1509 base = ROUND_ADDR( addr, page_mask );
1510
1511 /* avoid freeing the DOS area when a broken app passes a NULL pointer */
1512 if (!base && !(type & MEM_SYSTEM)) return STATUS_INVALID_PARAMETER;
1513
1514 server_enter_uninterrupted_section( &csVirtual, &sigset );
1515
1516 if (!(view = VIRTUAL_FindView( base )) ||
1517 (base + size > (char *)view->base + view->size) ||
1518 !(view->flags & VFLAG_VALLOC))
1519 {
1520 status = STATUS_INVALID_PARAMETER;
1521 }
1522 else if (type & MEM_SYSTEM)
1523 {
1524 /* return the values that the caller should use to unmap the area */
1525 *addr_ptr = view->base;
1526 if (!wine_mmap_is_in_reserved_area( view->base, view->size )) *size_ptr = view->size;
1527 else *size_ptr = 0; /* make sure we don't munmap anything from a reserved area */
1528 view->flags |= VFLAG_SYSTEM;
1529 delete_view( view );
1530 }
1531 else if (type == MEM_RELEASE)
1532 {
1533 /* Free the pages */
1534
1535 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
1536 else
1537 {
1538 delete_view( view );
1539 *addr_ptr = base;
1540 *size_ptr = size;
1541 }
1542 }
1543 else if (type == MEM_DECOMMIT)
1544 {
1545 status = decommit_pages( view, base - (char *)view->base, size );
1546 if (status == STATUS_SUCCESS)
1547 {
1548 *addr_ptr = base;
1549 *size_ptr = size;
1550 }
1551 }
1552 else
1553 {
1554 WARN("called with wrong free type flags (%08x) !\n", type);
1555 status = STATUS_INVALID_PARAMETER;
1556 }
1557
1558 server_leave_uninterrupted_section( &csVirtual, &sigset );
1559 return status;
1560 }
1561
1562
1563 /***********************************************************************
1564 * NtProtectVirtualMemory (NTDLL.@)
1565 * ZwProtectVirtualMemory (NTDLL.@)
1566 */
1567 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr,
1568 ULONG new_prot, ULONG *old_prot )
1569 {
1570 FILE_VIEW *view;
1571 sigset_t sigset;
1572 NTSTATUS status = STATUS_SUCCESS;
1573 char *base;
1574 UINT i;
1575 BYTE vprot, *p;
1576 ULONG prot;
1577 SIZE_T size = *size_ptr;
1578 LPVOID addr = *addr_ptr;
1579
1580 TRACE("%p %p %08lx %08x\n", process, addr, size, new_prot );
1581
1582 if (process != NtCurrentProcess())
1583 {
1584 apc_call_t call;
1585 apc_result_t result;
1586
1587 memset( &call, 0, sizeof(call) );
1588
1589 call.virtual_protect.type = APC_VIRTUAL_PROTECT;
1590 call.virtual_protect.addr = addr;
1591 call.virtual_protect.size = size;
1592 call.virtual_protect.prot = new_prot;
1593 status = NTDLL_queue_process_apc( process, &call, &result );
1594 if (status != STATUS_SUCCESS) return status;
1595
1596 if (result.virtual_protect.status == STATUS_SUCCESS)
1597 {
1598 *addr_ptr = result.virtual_protect.addr;
1599 *size_ptr = result.virtual_protect.size;
1600 if (old_prot) *old_prot = result.virtual_protect.prot;
1601 }
1602 return result.virtual_protect.status;
1603 }
1604
1605 /* Fix the parameters */
1606
1607 size = ROUND_SIZE( addr, size );
1608 base = ROUND_ADDR( addr, page_mask );
1609
1610 server_enter_uninterrupted_section( &csVirtual, &sigset );
1611
1612 if (!(view = VIRTUAL_FindView( base )) || (base + size > (char *)view->base + view->size))
1613 {
1614 status = STATUS_INVALID_PARAMETER;
1615 }
1616 else
1617 {
1618 /* Make sure all the pages are committed */
1619
1620 p = view->prot + ((base - (char *)view->base) >> page_shift);
1621 prot = VIRTUAL_GetWin32Prot( *p );
1622 for (i = size >> page_shift; i; i--, p++)
1623 {
1624 if (!(*p & VPROT_COMMITTED))
1625 {
1626 status = STATUS_NOT_COMMITTED;
1627 break;
1628 }
1629 }
1630 if (!i)
1631 {
1632 if (old_prot) *old_prot = prot;
1633 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1634 if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1635 }
1636 }
1637 server_leave_uninterrupted_section( &csVirtual, &sigset );
1638
1639 if (status == STATUS_SUCCESS)
1640 {
1641 *addr_ptr = base;
1642 *size_ptr = size;
1643 }
1644 return status;
1645 }
1646
1647 #define UNIMPLEMENTED_INFO_CLASS(c) \
1648 case c: \
1649 FIXME("(process=%p,addr=%p) Unimplemented information class: " #c "\n", process, addr); \
1650 return STATUS_INVALID_INFO_CLASS
1651
1652 /***********************************************************************
1653 * NtQueryVirtualMemory (NTDLL.@)
1654 * ZwQueryVirtualMemory (NTDLL.@)
1655 */
1656 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
1657 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
1658 SIZE_T len, SIZE_T *res_len )
1659 {
1660 FILE_VIEW *view;
1661 char *base, *alloc_base = 0;
1662 struct list *ptr;
1663 SIZE_T size = 0;
1664 MEMORY_BASIC_INFORMATION *info = buffer;
1665 sigset_t sigset;
1666
1667 if (info_class != MemoryBasicInformation)
1668 {
1669 switch(info_class)
1670 {
1671 UNIMPLEMENTED_INFO_CLASS(MemoryWorkingSetList);
1672 UNIMPLEMENTED_INFO_CLASS(MemorySectionName);
1673 UNIMPLEMENTED_INFO_CLASS(MemoryBasicVlmInformation);
1674
1675 default:
1676 FIXME("(%p,%p,info_class=%d,%p,%ld,%p) Unknown information class\n",
1677 process, addr, info_class, buffer, len, res_len);
1678 return STATUS_INVALID_INFO_CLASS;
1679 }
1680 }
1681 if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
1682 return STATUS_WORKING_SET_LIMIT_RANGE;
1683
1684 if (process != NtCurrentProcess())
1685 {
1686 NTSTATUS status;
1687 apc_call_t call;
1688 apc_result_t result;
1689
1690 memset( &call, 0, sizeof(call) );
1691
1692 call.virtual_query.type = APC_VIRTUAL_QUERY;
1693 call.virtual_query.addr = addr;
1694 status = NTDLL_queue_process_apc( process, &call, &result );
1695 if (status != STATUS_SUCCESS) return status;
1696
1697 if (result.virtual_query.status == STATUS_SUCCESS)
1698 {
1699 info->BaseAddress = result.virtual_query.base;
1700 info->AllocationBase = result.virtual_query.alloc_base;
1701 info->RegionSize = result.virtual_query.size;
1702 info->State = result.virtual_query.state;
1703 info->Protect = result.virtual_query.prot;
1704 info->AllocationProtect = result.virtual_query.alloc_prot;
1705 info->Type = result.virtual_query.alloc_type;
1706 if (res_len) *res_len = sizeof(*info);
1707 }
1708 return result.virtual_query.status;
1709 }
1710
1711 base = ROUND_ADDR( addr, page_mask );
1712
1713 /* Find the view containing the address */
1714
1715 server_enter_uninterrupted_section( &csVirtual, &sigset );
1716 ptr = list_head( &views_list );
1717 for (;;)
1718 {
1719 if (!ptr)
1720 {
1721 /* make the address space end at the user limit, except if
1722 * the last view was mapped beyond that */
1723 if (alloc_base <= (char *)user_space_limit)
1724 {
1725 if (user_space_limit && base >= (char *)user_space_limit)
1726 {
1727 server_leave_uninterrupted_section( &csVirtual, &sigset );
1728 return STATUS_WORKING_SET_LIMIT_RANGE;
1729 }
1730 size = (char *)user_space_limit - alloc_base;
1731 }
1732 else size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1733 view = NULL;
1734 break;
1735 }
1736 view = LIST_ENTRY( ptr, struct file_view, entry );
1737 if ((char *)view->base > base)
1738 {
1739 size = (char *)view->base - alloc_base;
1740 view = NULL;
1741 break;
1742 }
1743 if ((char *)view->base + view->size > base)
1744 {
1745 alloc_base = view->base;
1746 size = view->size;
1747 break;
1748 }
1749 alloc_base = (char *)view->base + view->size;
1750 ptr = list_next( &views_list, ptr );
1751 }
1752
1753 /* Fill the info structure */
1754
1755 if (!view)
1756 {
1757 info->State = MEM_FREE;
1758 info->Protect = PAGE_NOACCESS;
1759 info->AllocationBase = 0;
1760 info->AllocationProtect = 0;
1761 info->Type = 0;
1762 }
1763 else
1764 {
1765 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1766 info->State = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
1767 info->Protect = VIRTUAL_GetWin32Prot( vprot );
1768 info->AllocationBase = alloc_base;
1769 info->AllocationProtect = VIRTUAL_GetWin32Prot( view->protect );
1770 if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
1771 else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
1772 else info->Type = MEM_MAPPED;
1773 for (size = base - alloc_base; size < view->size; size += page_size)
1774 if (view->prot[size >> page_shift] != vprot) break;
1775 }
1776 server_leave_uninterrupted_section( &csVirtual, &sigset );
1777
1778 info->BaseAddress = base;
1779 info->RegionSize = size - (base - alloc_base);
1780 if (res_len) *res_len = sizeof(*info);
1781 return STATUS_SUCCESS;
1782 }
1783
1784
1785 /***********************************************************************
1786 * NtLockVirtualMemory (NTDLL.@)
1787 * ZwLockVirtualMemory (NTDLL.@)
1788 */
1789 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1790 {
1791 NTSTATUS status = STATUS_SUCCESS;
1792
1793 if (process != NtCurrentProcess())
1794 {
1795 apc_call_t call;
1796 apc_result_t result;
1797
1798 memset( &call, 0, sizeof(call) );
1799
1800 call.virtual_lock.type = APC_VIRTUAL_LOCK;
1801 call.virtual_lock.addr = *addr;
1802 call.virtual_lock.size = *size;
1803 status = NTDLL_queue_process_apc( process, &call, &result );
1804 if (status != STATUS_SUCCESS) return status;
1805
1806 if (result.virtual_lock.status == STATUS_SUCCESS)
1807 {
1808 *addr = result.virtual_lock.addr;
1809 *size = result.virtual_lock.size;
1810 }
1811 return result.virtual_lock.status;
1812 }
1813
1814 *size = ROUND_SIZE( *addr, *size );
1815 *addr = ROUND_ADDR( *addr, page_mask );
1816
1817 if (mlock( *addr, *size )) status = STATUS_ACCESS_DENIED;
1818 return status;
1819 }
1820
1821
1822 /***********************************************************************
1823 * NtUnlockVirtualMemory (NTDLL.@)
1824 * ZwUnlockVirtualMemory (NTDLL.@)
1825 */
1826 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1827 {
1828 NTSTATUS status = STATUS_SUCCESS;
1829
1830 if (process != NtCurrentProcess())
1831 {
1832 apc_call_t call;
1833 apc_result_t result;
1834
1835 memset( &call, 0, sizeof(call) );
1836
1837 call.virtual_unlock.type = APC_VIRTUAL_UNLOCK;
1838 call.virtual_unlock.addr = *addr;
1839 call.virtual_unlock.size = *size;
1840 status = NTDLL_queue_process_apc( process, &call, &result );
1841 if (status != STATUS_SUCCESS) return status;
1842
1843 if (result.virtual_unlock.status == STATUS_SUCCESS)
1844 {
1845 *addr = result.virtual_unlock.addr;
1846 *size = result.virtual_unlock.size;
1847 }
1848 return result.virtual_unlock.status;
1849 }
1850
1851 *size = ROUND_SIZE( *addr, *size );
1852 *addr = ROUND_ADDR( *addr, page_mask );
1853
1854 if (munlock( *addr, *size )) status = STATUS_ACCESS_DENIED;
1855 return status;
1856 }
1857
1858
1859 /***********************************************************************
1860 * NtCreateSection (NTDLL.@)
1861 * ZwCreateSection (NTDLL.@)
1862 */
1863 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
1864 const LARGE_INTEGER *size, ULONG protect,
1865 ULONG sec_flags, HANDLE file )
1866 {
1867 NTSTATUS ret;
1868 BYTE vprot;
1869 DWORD len = (attr && attr->ObjectName) ? attr->ObjectName->Length : 0;
1870 struct security_descriptor *sd = NULL;
1871 struct object_attributes objattr;
1872
1873 /* Check parameters */
1874
1875 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1876
1877 objattr.rootdir = attr ? attr->RootDirectory : 0;
1878 objattr.sd_len = 0;
1879 objattr.name_len = len;
1880 if (attr)
1881 {
1882 ret = NTDLL_create_struct_sd( attr->SecurityDescriptor, &sd, &objattr.sd_len );
1883 if (ret != STATUS_SUCCESS) return ret;
1884 }
1885
1886 vprot = VIRTUAL_GetProt( protect );
1887 if (sec_flags & SEC_RESERVE)
1888 {
1889 if (file) return STATUS_INVALID_PARAMETER;
1890 }
1891 else vprot |= VPROT_COMMITTED;
1892 if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1893 if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
1894
1895 /* Create the server object */
1896
1897 SERVER_START_REQ( create_mapping )
1898 {
1899 req->access = access;
1900 req->attributes = (attr) ? attr->Attributes : 0;
1901 req->file_handle = file;
1902 req->size = size ? size->QuadPart : 0;
1903 req->protect = vprot;
1904 wine_server_add_data( req, &objattr, sizeof(objattr) );
1905 if (objattr.sd_len) wine_server_add_data( req, sd, objattr.sd_len );
1906 if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
1907 ret = wine_server_call( req );
1908 *handle = reply->handle;
1909 }
1910 SERVER_END_REQ;
1911
1912 NTDLL_free_struct_sd( sd );
1913
1914 return ret;
1915 }
1916
1917
1918 /***********************************************************************
1919 * NtOpenSection (NTDLL.@)
1920 * ZwOpenSection (NTDLL.@)
1921 */
1922 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
1923 {
1924 NTSTATUS ret;
1925 DWORD len = attr->ObjectName->Length;
1926
1927 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1928
1929 SERVER_START_REQ( open_mapping )
1930 {
1931 req->access = access;
1932 req->attributes = (attr) ? attr->Attributes : 0;
1933 req->rootdir = attr ? attr->RootDirectory : 0;
1934 wine_server_add_data( req, attr->ObjectName->Buffer, len );
1935 if (!(ret = wine_server_call( req ))) *handle = reply->handle;
1936 }
1937 SERVER_END_REQ;
1938 return ret;
1939 }
1940
1941
1942 /***********************************************************************
1943 * NtMapViewOfSection (NTDLL.@)
1944 * ZwMapViewOfSection (NTDLL.@)
1945 */
1946 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
1947 SIZE_T commit_size, const LARGE_INTEGER *offset_ptr, SIZE_T *size_ptr,
1948 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
1949 {
1950 NTSTATUS res;
1951 ULONGLONG full_size;
1952 SIZE_T size = 0;
1953 SIZE_T mask = get_mask( zero_bits );
1954 int unix_handle = -1, needs_close;
1955 int prot;
1956 void *base;
1957 struct file_view *view;
1958 DWORD header_size;
1959 HANDLE dup_mapping, shared_file;
1960 LARGE_INTEGER offset;
1961 sigset_t sigset;
1962
1963 offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
1964
1965 TRACE("handle=%p process=%p addr=%p off=%x%08x size=%lx access=%x\n",
1966 handle, process, *addr_ptr, offset.u.HighPart, offset.u.LowPart, size, protect );
1967
1968 /* Check parameters */
1969
1970 if ((offset.u.LowPart & mask) || (*addr_ptr && ((UINT_PTR)*addr_ptr & mask)))
1971 return STATUS_INVALID_PARAMETER;
1972
1973 if (process != NtCurrentProcess())
1974 {
1975 apc_call_t call;
1976 apc_result_t result;
1977
1978 memset( &call, 0, sizeof(call) );
1979
1980 call.map_view.type = APC_MAP_VIEW;
1981 call.map_view.handle = handle;
1982 call.map_view.addr = *addr_ptr;
1983 call.map_view.size = *size_ptr;
1984 call.map_view.offset = offset.QuadPart;
1985 call.map_view.zero_bits = zero_bits;
1986 call.map_view.alloc_type = alloc_type;
1987 call.map_view.prot = protect;
1988 res = NTDLL_queue_process_apc( process, &call, &result );
1989 if (res != STATUS_SUCCESS) return res;
1990
1991 if (result.map_view.status == STATUS_SUCCESS)
1992 {
1993 *addr_ptr = result.map_view.addr;
1994 *size_ptr = result.map_view.size;
1995 }
1996 return result.map_view.status;
1997 }
1998
1999 SERVER_START_REQ( get_mapping_info )
2000 {
2001 req->handle = handle;
2002 res = wine_server_call( req );
2003 prot = reply->protect;
2004 base = reply->base;
2005 full_size = reply->size;
2006 header_size = reply->header_size;
2007 dup_mapping = reply->mapping;
2008 shared_file = reply->shared_file;
2009 }
2010 SERVER_END_REQ;
2011 if (res) return res;
2012
2013 size = full_size;
2014 if (sizeof(size) < sizeof(full_size) && (size != full_size))
2015 ERR( "Sizes larger than 4Gb (%x%08x) not supported on this platform\n",
2016 (DWORD)(full_size >> 32), (DWORD)full_size );
2017
2018 if ((res = server_get_unix_fd( handle, 0, &unix_handle, &needs_close, NULL, NULL ))) goto done;
2019
2020 if (prot & VPROT_IMAGE)
2021 {
2022 if (shared_file)
2023 {
2024 int shared_fd, shared_needs_close;
2025
2026 if ((res = server_get_unix_fd( shared_file, FILE_READ_DATA|FILE_WRITE_DATA,
2027 &shared_fd, &shared_needs_close, NULL, NULL ))) goto done;
2028 res = map_image( handle, unix_handle, base, size, mask, header_size,
2029 shared_fd, dup_mapping, addr_ptr );
2030 if (shared_needs_close) close( shared_fd );
2031 NtClose( shared_file );
2032 }
2033 else
2034 {
2035 res = map_image( handle, unix_handle, base, size, mask, header_size,
2036 -1, dup_mapping, addr_ptr );
2037 }
2038 if (needs_close) close( unix_handle );
2039 if (!res) *size_ptr = size;
2040 return res;
2041 }
2042
2043 if ((offset.QuadPart >= size) || (*size_ptr > size - offset.QuadPart))
2044 {
2045 res = STATUS_INVALID_PARAMETER;
2046 goto done;
2047 }
2048 if (*size_ptr) size = ROUND_SIZE( offset.u.LowPart, *size_ptr );
2049 else size = size - offset.QuadPart;
2050
2051 switch(protect)
2052 {
2053 case PAGE_NOACCESS:
2054 break;
2055 case PAGE_READWRITE:
2056 case PAGE_EXECUTE_READWRITE:
2057 if (!(prot & VPROT_WRITE))
2058 {
2059 res = STATUS_INVALID_PARAMETER;
2060 goto done;
2061 }
2062 /* fall through */
2063 case PAGE_READONLY:
2064 case PAGE_WRITECOPY:
2065 case PAGE_EXECUTE:
2066 case PAGE_EXECUTE_READ:
2067 case PAGE_EXECUTE_WRITECOPY:
2068 if (prot & VPROT_READ) break;
2069 /* fall through */
2070 default:
2071 res = STATUS_INVALID_PARAMETER;
2072 goto done;
2073 }
2074
2075 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
2076 * which has a view of this mapping commits some pages, they will
2077 * appear committed in all other processes, which have the same
2078 * view created. Since we don't support this yet, we create the
2079 * whole mapping committed.
2080 */
2081 prot |= VPROT_COMMITTED;
2082
2083 /* Reserve a properly aligned area */
2084
2085 server_enter_uninterrupted_section( &csVirtual, &sigset );
2086
2087 res = map_view( &view, *addr_ptr, size, mask, FALSE, prot );
2088 if (res)
2089 {
2090 server_leave_uninterrupted_section( &csVirtual, &sigset );
2091 goto done;
2092 }
2093
2094 /* Map the file */
2095
2096 TRACE("handle=%p size=%lx offset=%x%08x\n",
2097 handle, size, offset.u.HighPart, offset.u.LowPart );
2098
2099 res = map_file_into_view( view, unix_handle, 0, size, offset.QuadPart, prot, !dup_mapping );
2100 if (res == STATUS_SUCCESS)
2101 {
2102 *addr_ptr = view->base;
2103 *size_ptr = size;
2104 view->mapping = dup_mapping;
2105 dup_mapping = 0; /* don't close it */
2106 }
2107 else
2108 {
2109 ERR( "map_file_into_view %p %lx %x%08x failed\n",
2110 view->base, size, offset.u.HighPart, offset.u.LowPart );
2111 delete_view( view );
2112 }
2113
2114 server_leave_uninterrupted_section( &csVirtual, &sigset );
2115
2116 done:
2117 if (dup_mapping) NtClose( dup_mapping );
2118 if (needs_close) close( unix_handle );
2119 return res;
2120 }
2121
2122
2123 /***********************************************************************
2124 * NtUnmapViewOfSection (NTDLL.@)
2125 * ZwUnmapViewOfSection (NTDLL.@)
2126 */
2127 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
2128 {
2129 FILE_VIEW *view;
2130 NTSTATUS status = STATUS_INVALID_PARAMETER;
2131 sigset_t sigset;
2132 void *base = ROUND_ADDR( addr, page_mask );
2133
2134 if (process != NtCurrentProcess())
2135 {
2136 apc_call_t call;
2137 apc_result_t result;
2138
2139 memset( &call, 0, sizeof(call) );
2140
2141 call.unmap_view.type = APC_UNMAP_VIEW;
2142 call.unmap_view.addr = addr;
2143 status = NTDLL_queue_process_apc( process, &call, &result );
2144 if (status == STATUS_SUCCESS) status = result.unmap_view.status;
2145 return status;
2146 }
2147
2148 server_enter_uninterrupted_section( &csVirtual, &sigset );
2149 if ((view = VIRTUAL_FindView( base )) && (base == view->base))
2150 {
2151 delete_view( view );
2152 status = STATUS_SUCCESS;
2153 }
2154 server_leave_uninterrupted_section( &csVirtual, &sigset );
2155 return status;
2156 }
2157
2158
2159 /***********************************************************************
2160 * NtFlushVirtualMemory (NTDLL.@)
2161 * ZwFlushVirtualMemory (NTDLL.@)
2162 */
2163 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
2164 SIZE_T *size_ptr, ULONG unknown )
2165 {
2166 FILE_VIEW *view;
2167 NTSTATUS status = STATUS_SUCCESS;
2168 sigset_t sigset;
2169 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
2170
2171 if (process != NtCurrentProcess())
2172 {
2173 apc_call_t call;
2174 apc_result_t result;
2175
2176 memset( &call, 0, sizeof(call) );
2177
2178 call.virtual_flush.type = APC_VIRTUAL_FLUSH;
2179 call.virtual_flush.addr = addr;
2180 call.virtual_flush.size = *size_ptr;
2181 status = NTDLL_queue_process_apc( process, &call, &result );
2182 if (status != STATUS_SUCCESS) return status;
2183
2184 if (result.virtual_flush.status == STATUS_SUCCESS)
2185 {
2186 *addr_ptr = result.virtual_flush.addr;
2187 *size_ptr = result.virtual_flush.size;
2188 }
2189 return result.virtual_flush.status;
2190 }
2191
2192 server_enter_uninterrupted_section( &csVirtual, &sigset );
2193 if (!(view = VIRTUAL_FindView( addr ))) status = STATUS_INVALID_PARAMETER;
2194 else
2195 {
2196 if (!*size_ptr) *size_ptr = view->size;
2197 *addr_ptr = addr;
2198 if (msync( addr, *size_ptr, MS_SYNC )) status = STATUS_NOT_MAPPED_DATA;
2199 }
2200 server_leave_uninterrupted_section( &csVirtual, &sigset );
2201 return status;
2202 }
2203
2204
2205 /***********************************************************************
2206 * NtReadVirtualMemory (NTDLL.@)
2207 * ZwReadVirtualMemory (NTDLL.@)
2208 */
2209 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
2210 SIZE_T size, SIZE_T *bytes_read )
2211 {
2212 NTSTATUS status;
2213
2214 SERVER_START_REQ( read_process_memory )
2215 {
2216 req->handle = process;
2217 req->addr = (void *)addr;
2218 wine_server_set_reply( req, buffer, size );
2219 if ((status = wine_server_call( req ))) size = 0;
2220 }
2221 SERVER_END_REQ;
2222 if (bytes_read) *bytes_read = size;
2223 return status;
2224 }
2225
2226
2227 /***********************************************************************
2228 * NtWriteVirtualMemory (NTDLL.@)
2229 * ZwWriteVirtualMemory (NTDLL.@)
2230 */
2231 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
2232 SIZE_T size, SIZE_T *bytes_written )
2233 {
2234 NTSTATUS status;
2235
2236 SERVER_START_REQ( write_process_memory )
2237 {
2238 req->handle = process;
2239 req->addr = addr;
2240 wine_server_add_data( req, buffer, size );
2241 if ((status = wine_server_call( req ))) size = 0;
2242 }
2243 SERVER_END_REQ;
2244 if (bytes_written) *bytes_written = size;
2245 return status;
2246 }
2247
2248
2249 /***********************************************************************
2250 * NtAreMappedFilesTheSame (NTDLL.@)
2251 * ZwAreMappedFilesTheSame (NTDLL.@)
2252 */
2253 NTSTATUS WINAPI NtAreMappedFilesTheSame(PVOID addr1, PVOID addr2)
2254 {
2255 TRACE("%p %p\n", addr1, addr2);
2256
2257 return STATUS_NOT_SAME_DEVICE;
2258 }
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