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msvfw32: Simplify error handling in ICSeqCompressFrameStart.
[wine/multimedia.git] / dlls / ntdll / virtual.c
blob4d4bc3bc6b3e22631ad5abe285ed6b3308895503
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 #include <fcntl.h>
27 #ifdef HAVE_UNISTD_H
28 # include <unistd.h>
29 #endif
30 #include <stdarg.h>
31 #include <stdlib.h>
32 #include <stdio.h>
33 #include <string.h>
34 #include <sys/types.h>
35 #ifdef HAVE_SYS_STAT_H
36 # include <sys/stat.h>
37 #endif
38 #ifdef HAVE_SYS_MMAN_H
39 # include <sys/mman.h>
40 #endif
41 #ifdef HAVE_VALGRIND_VALGRIND_H
42 # include <valgrind/valgrind.h>
43 #endif
44
45 #include "ntstatus.h"
46 #define WIN32_NO_STATUS
47 #define NONAMELESSUNION
48 #include "windef.h"
49 #include "winternl.h"
50 #include "wine/library.h"
51 #include "wine/server.h"
52 #include "wine/exception.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 MAP_NORESERVE
61 #define MAP_NORESERVE 0
62 #endif
63
64 /* File view */
65 struct file_view
66 {
67 struct list entry; /* Entry in global view list */
68 void *base; /* Base address */
69 size_t size; /* Size in bytes */
70 HANDLE mapping; /* Handle to the file mapping */
71 unsigned int map_protect; /* Mapping protection */
72 unsigned int protect; /* Protection for all pages at allocation time */
73 BYTE prot[1]; /* Protection byte for each page */
74 };
75
76
77 /* Conversion from VPROT_* to Win32 flags */
78 static const BYTE VIRTUAL_Win32Flags[16] =
79 {
80 PAGE_NOACCESS, /* 0 */
81 PAGE_READONLY, /* READ */
82 PAGE_READWRITE, /* WRITE */
83 PAGE_READWRITE, /* READ | WRITE */
84 PAGE_EXECUTE, /* EXEC */
85 PAGE_EXECUTE_READ, /* READ | EXEC */
86 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
87 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
88 PAGE_WRITECOPY, /* WRITECOPY */
89 PAGE_WRITECOPY, /* READ | WRITECOPY */
90 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
91 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
92 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
93 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
94 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
95 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
96 };
97
98 static struct list views_list = LIST_INIT(views_list);
99
100 static RTL_CRITICAL_SECTION csVirtual;
101 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
102 {
103 0, 0, &csVirtual,
104 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
105 0, 0, { (DWORD_PTR)(__FILE__ ": csVirtual") }
106 };
107 static RTL_CRITICAL_SECTION csVirtual = { &critsect_debug, -1, 0, 0, 0, 0 };
108
109 #ifdef __i386__
110 static const UINT page_shift = 12;
111 static const UINT_PTR page_mask = 0xfff;
112 /* Note: these are Windows limits, you cannot change them. */
113 static void *address_space_limit = (void *)0xc0000000; /* top of the total available address space */
114 static void *user_space_limit = (void *)0x7fff0000; /* top of the user address space */
115 static void *working_set_limit = (void *)0x7fff0000; /* top of the current working set */
116 static void *address_space_start = (void *)0x110000; /* keep DOS area clear */
117 #elif defined(__x86_64__)
118 static const UINT page_shift = 12;
119 static const UINT_PTR page_mask = 0xfff;
120 static void *address_space_limit = (void *)0x7fffffff0000;
121 static void *user_space_limit = (void *)0x7fffffff0000;
122 static void *working_set_limit = (void *)0x7fffffff0000;
123 static void *address_space_start = (void *)0x10000;
124 #else
125 UINT_PTR page_size = 0;
126 static UINT page_shift;
127 static UINT_PTR page_mask;
128 static void *address_space_limit;
129 static void *user_space_limit;
130 static void *working_set_limit;
131 static void *address_space_start = (void *)0x10000;
132 #endif /* __i386__ */
133 static const BOOL is_win64 = (sizeof(void *) > sizeof(int));
134
135 #define ROUND_ADDR(addr,mask) \
136 ((void *)((UINT_PTR)(addr) & ~(UINT_PTR)(mask)))
137
138 #define ROUND_SIZE(addr,size) \
139 (((SIZE_T)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
140
141 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
142 do { if (TRACE_ON(virtual)) VIRTUAL_DumpView(view); } while (0)
143
144 #define VIRTUAL_HEAP_SIZE (sizeof(void*)*1024*1024)
145
146 static HANDLE virtual_heap;
147 static void *preload_reserve_start;
148 static void *preload_reserve_end;
149 static BOOL use_locks;
150 static BOOL force_exec_prot; /* whether to force PROT_EXEC on all PROT_READ mmaps */
151
152
153 /***********************************************************************
154 * VIRTUAL_GetProtStr
155 */
156 static const char *VIRTUAL_GetProtStr( BYTE prot )
157 {
158 static char buffer[6];
159 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
160 buffer[1] = (prot & VPROT_GUARD) ? 'g' : ((prot & VPROT_WRITEWATCH) ? 'H' : '-');
161 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
162 buffer[3] = (prot & VPROT_WRITECOPY) ? 'W' : ((prot & VPROT_WRITE) ? 'w' : '-');
163 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
164 buffer[5] = 0;
165 return buffer;
166 }
167
168
169 /***********************************************************************
170 * VIRTUAL_GetUnixProt
171 *
172 * Convert page protections to protection for mmap/mprotect.
173 */
174 static int VIRTUAL_GetUnixProt( BYTE vprot )
175 {
176 int prot = 0;
177 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
178 {
179 if (vprot & VPROT_READ) prot |= PROT_READ;
180 if (vprot & VPROT_WRITE) prot |= PROT_WRITE | PROT_READ;
181 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE | PROT_READ;
182 if (vprot & VPROT_EXEC) prot |= PROT_EXEC | PROT_READ;
183 if (vprot & VPROT_WRITEWATCH) prot &= ~PROT_WRITE;
184 }
185 if (!prot) prot = PROT_NONE;
186 return prot;
187 }
188
189
190 /***********************************************************************
191 * VIRTUAL_DumpView
192 */
193 static void VIRTUAL_DumpView( struct file_view *view )
194 {
195 UINT i, count;
196 char *addr = view->base;
197 BYTE prot = view->prot[0];
198
199 TRACE( "View: %p - %p", addr, addr + view->size - 1 );
200 if (view->protect & VPROT_SYSTEM)
201 TRACE( " (system)\n" );
202 else if (view->protect & VPROT_VALLOC)
203 TRACE( " (valloc)\n" );
204 else if (view->mapping)
205 TRACE( " %p\n", view->mapping );
206 else
207 TRACE( " (anonymous)\n");
208
209 for (count = i = 1; i < view->size >> page_shift; i++, count++)
210 {
211 if (view->prot[i] == prot) continue;
212 TRACE( " %p - %p %s\n",
213 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
214 addr += (count << page_shift);
215 prot = view->prot[i];
216 count = 0;
217 }
218 if (count)
219 TRACE( " %p - %p %s\n",
220 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
221 }
222
223
224 /***********************************************************************
225 * VIRTUAL_Dump
226 */
227 #ifdef WINE_VM_DEBUG
228 static void VIRTUAL_Dump(void)
229 {
230 sigset_t sigset;
231 struct file_view *view;
232
233 TRACE( "Dump of all virtual memory views:\n" );
234 server_enter_uninterrupted_section( &csVirtual, &sigset );
235 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
236 {
237 VIRTUAL_DumpView( view );
238 }
239 server_leave_uninterrupted_section( &csVirtual, &sigset );
240 }
241 #endif
242
243
244 /***********************************************************************
245 * VIRTUAL_FindView
246 *
247 * Find the view containing a given address. The csVirtual section must be held by caller.
248 *
249 * PARAMS
250 * addr [I] Address
251 *
252 * RETURNS
253 * View: Success
254 * NULL: Failure
255 */
256 static struct file_view *VIRTUAL_FindView( const void *addr, size_t size )
257 {
258 struct file_view *view;
259
260 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
261 {
262 if (view->base > addr) break; /* no matching view */
263 if ((const char *)view->base + view->size <= (const char *)addr) continue;
264 if ((const char *)view->base + view->size < (const char *)addr + size) break; /* size too large */
265 if ((const char *)addr + size < (const char *)addr) break; /* overflow */
266 return view;
267 }
268 return NULL;
269 }
270
271
272 /***********************************************************************
273 * get_mask
274 */
275 static inline UINT_PTR get_mask( ULONG zero_bits )
276 {
277 if (!zero_bits) return 0xffff; /* allocations are aligned to 64K by default */
278 if (zero_bits < page_shift) zero_bits = page_shift;
279 return (1 << zero_bits) - 1;
280 }
281
282
283 /***********************************************************************
284 * find_view_range
285 *
286 * Find the first view overlapping at least part of the specified range.
287 * The csVirtual section must be held by caller.
288 */
289 static struct file_view *find_view_range( const void *addr, size_t size )
290 {
291 struct file_view *view;
292
293 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
294 {
295 if ((const char *)view->base >= (const char *)addr + size) break;
296 if ((const char *)view->base + view->size > (const char *)addr) return view;
297 }
298 return NULL;
299 }
300
301
302 /***********************************************************************
303 * find_free_area
304 *
305 * Find a free area between views inside the specified range.
306 * The csVirtual section must be held by caller.
307 */
308 static void *find_free_area( void *base, void *end, size_t size, size_t mask, int top_down )
309 {
310 struct list *ptr;
311 void *start;
312
313 if (top_down)
314 {
315 start = ROUND_ADDR( (char *)end - size, mask );
316 if (start >= end || start < base) return NULL;
317
318 for (ptr = views_list.prev; ptr != &views_list; ptr = ptr->prev)
319 {
320 struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
321
322 if ((char *)view->base + view->size <= (char *)start) break;
323 if ((char *)view->base >= (char *)start + size) continue;
324 start = ROUND_ADDR( (char *)view->base - size, mask );
325 /* stop if remaining space is not large enough */
326 if (!start || start >= end || start < base) return NULL;
327 }
328 }
329 else
330 {
331 start = ROUND_ADDR( (char *)base + mask, mask );
332 if (start >= end || (char *)end - (char *)start < size) return NULL;
333
334 for (ptr = views_list.next; ptr != &views_list; ptr = ptr->next)
335 {
336 struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
337
338 if ((char *)view->base >= (char *)start + size) break;
339 if ((char *)view->base + view->size <= (char *)start) continue;
340 start = ROUND_ADDR( (char *)view->base + view->size + mask, mask );
341 /* stop if remaining space is not large enough */
342 if (!start || start >= end || (char *)end - (char *)start < size) return NULL;
343 }
344 }
345 return start;
346 }
347
348
349 /***********************************************************************
350 * add_reserved_area
351 *
352 * Add a reserved area to the list maintained by libwine.
353 * The csVirtual section must be held by caller.
354 */
355 static void add_reserved_area( void *addr, size_t size )
356 {
357 TRACE( "adding %p-%p\n", addr, (char *)addr + size );
358
359 if (addr < user_space_limit)
360 {
361 /* unmap the part of the area that is below the limit */
362 assert( (char *)addr + size > (char *)user_space_limit );
363 munmap( addr, (char *)user_space_limit - (char *)addr );
364 size -= (char *)user_space_limit - (char *)addr;
365 addr = user_space_limit;
366 }
367 /* blow away existing mappings */
368 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
369 wine_mmap_add_reserved_area( addr, size );
370 }
371
372
373 /***********************************************************************
374 * remove_reserved_area
375 *
376 * Remove a reserved area from the list maintained by libwine.
377 * The csVirtual section must be held by caller.
378 */
379 static void remove_reserved_area( void *addr, size_t size )
380 {
381 struct file_view *view;
382
383 TRACE( "removing %p-%p\n", addr, (char *)addr + size );
384 wine_mmap_remove_reserved_area( addr, size, 0 );
385
386 /* unmap areas not covered by an existing view */
387 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
388 {
389 if ((char *)view->base >= (char *)addr + size)
390 {
391 munmap( addr, size );
392 break;
393 }
394 if ((char *)view->base + view->size <= (char *)addr) continue;
395 if (view->base > addr) munmap( addr, (char *)view->base - (char *)addr );
396 if ((char *)view->base + view->size > (char *)addr + size) break;
397 size = (char *)addr + size - ((char *)view->base + view->size);
398 addr = (char *)view->base + view->size;
399 }
400 }
401
402
403 /***********************************************************************
404 * is_beyond_limit
405 *
406 * Check if an address range goes beyond a given limit.
407 */
408 static inline BOOL is_beyond_limit( const void *addr, size_t size, const void *limit )
409 {
410 return (addr >= limit || (const char *)addr + size > (const char *)limit);
411 }
412
413
414 /***********************************************************************
415 * unmap_area
416 *
417 * Unmap an area, or simply replace it by an empty mapping if it is
418 * in a reserved area. The csVirtual section must be held by caller.
419 */
420 static inline void unmap_area( void *addr, size_t size )
421 {
422 if (wine_mmap_is_in_reserved_area( addr, size ))
423 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
424 else if (is_beyond_limit( addr, size, user_space_limit ))
425 add_reserved_area( addr, size );
426 else
427 munmap( addr, size );
428 }
429
430
431 /***********************************************************************
432 * delete_view
433 *
434 * Deletes a view. The csVirtual section must be held by caller.
435 */
436 static void delete_view( struct file_view *view ) /* [in] View */
437 {
438 if (!(view->protect & VPROT_SYSTEM)) unmap_area( view->base, view->size );
439 list_remove( &view->entry );
440 if (view->mapping) close_handle( view->mapping );
441 RtlFreeHeap( virtual_heap, 0, view );
442 }
443
444
445 /***********************************************************************
446 * create_view
447 *
448 * Create a view. The csVirtual section must be held by caller.
449 */
450 static NTSTATUS create_view( struct file_view **view_ret, void *base, size_t size, unsigned int vprot )
451 {
452 struct file_view *view;
453 struct list *ptr;
454 int unix_prot = VIRTUAL_GetUnixProt( vprot );
455
456 assert( !((UINT_PTR)base & page_mask) );
457 assert( !(size & page_mask) );
458
459 /* Create the view structure */
460
461 if (!(view = RtlAllocateHeap( virtual_heap, 0, sizeof(*view) + (size >> page_shift) - 1 )))
462 {
463 FIXME( "out of memory in virtual heap for %p-%p\n", base, (char *)base + size );
464 return STATUS_NO_MEMORY;
465 }
466
467 view->base = base;
468 view->size = size;
469 view->mapping = 0;
470 view->map_protect = 0;
471 view->protect = vprot;
472 memset( view->prot, vprot, size >> page_shift );
473
474 /* Insert it in the linked list */
475
476 LIST_FOR_EACH( ptr, &views_list )
477 {
478 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
479 if (next->base > base) break;
480 }
481 list_add_before( ptr, &view->entry );
482
483 /* Check for overlapping views. This can happen if the previous view
484 * was a system view that got unmapped behind our back. In that case
485 * we recover by simply deleting it. */
486
487 if ((ptr = list_prev( &views_list, &view->entry )) != NULL)
488 {
489 struct file_view *prev = LIST_ENTRY( ptr, struct file_view, entry );
490 if ((char *)prev->base + prev->size > (char *)base)
491 {
492 TRACE( "overlapping prev view %p-%p for %p-%p\n",
493 prev->base, (char *)prev->base + prev->size,
494 base, (char *)base + view->size );
495 assert( prev->protect & VPROT_SYSTEM );
496 delete_view( prev );
497 }
498 }
499 if ((ptr = list_next( &views_list, &view->entry )) != NULL)
500 {
501 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
502 if ((char *)base + view->size > (char *)next->base)
503 {
504 TRACE( "overlapping next view %p-%p for %p-%p\n",
505 next->base, (char *)next->base + next->size,
506 base, (char *)base + view->size );
507 assert( next->protect & VPROT_SYSTEM );
508 delete_view( next );
509 }
510 }
511
512 *view_ret = view;
513 VIRTUAL_DEBUG_DUMP_VIEW( view );
514
515 if (force_exec_prot && !(vprot & VPROT_NOEXEC) && (unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
516 {
517 TRACE( "forcing exec permission on %p-%p\n", base, (char *)base + size - 1 );
518 mprotect( base, size, unix_prot | PROT_EXEC );
519 }
520 return STATUS_SUCCESS;
521 }
522
523
524 /***********************************************************************
525 * VIRTUAL_GetWin32Prot
526 *
527 * Convert page protections to Win32 flags.
528 */
529 static DWORD VIRTUAL_GetWin32Prot( BYTE vprot )
530 {
531 DWORD ret = VIRTUAL_Win32Flags[vprot & 0x0f];
532 if (vprot & VPROT_NOCACHE) ret |= PAGE_NOCACHE;
533 if (vprot & VPROT_GUARD) ret |= PAGE_GUARD;
534 return ret;
535 }
536
537
538 /***********************************************************************
539 * get_vprot_flags
540 *
541 * Build page protections from Win32 flags.
542 *
543 * PARAMS
544 * protect [I] Win32 protection flags
545 *
546 * RETURNS
547 * Value of page protection flags
548 */
549 static NTSTATUS get_vprot_flags( DWORD protect, unsigned int *vprot, BOOL image )
550 {
551 switch(protect & 0xff)
552 {
553 case PAGE_READONLY:
554 *vprot = VPROT_READ;
555 break;
556 case PAGE_READWRITE:
557 if (image)
558 *vprot = VPROT_READ | VPROT_WRITECOPY;
559 else
560 *vprot = VPROT_READ | VPROT_WRITE;
561 break;
562 case PAGE_WRITECOPY:
563 *vprot = VPROT_READ | VPROT_WRITECOPY;
564 break;
565 case PAGE_EXECUTE:
566 *vprot = VPROT_EXEC;
567 break;
568 case PAGE_EXECUTE_READ:
569 *vprot = VPROT_EXEC | VPROT_READ;
570 break;
571 case PAGE_EXECUTE_READWRITE:
572 if (image)
573 *vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
574 else
575 *vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
576 break;
577 case PAGE_EXECUTE_WRITECOPY:
578 *vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
579 break;
580 case PAGE_NOACCESS:
581 *vprot = 0;
582 break;
583 default:
584 return STATUS_INVALID_PAGE_PROTECTION;
585 }
586 if (protect & PAGE_GUARD) *vprot |= VPROT_GUARD;
587 if (protect & PAGE_NOCACHE) *vprot |= VPROT_NOCACHE;
588 return STATUS_SUCCESS;
589 }
590
591
592 /***********************************************************************
593 * mprotect_exec
594 *
595 * Wrapper for mprotect, adds PROT_EXEC if forced by force_exec_prot
596 */
597 static inline int mprotect_exec( void *base, size_t size, int unix_prot, unsigned int view_protect )
598 {
599 if (force_exec_prot && !(view_protect & VPROT_NOEXEC) &&
600 (unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
601 {
602 TRACE( "forcing exec permission on %p-%p\n", base, (char *)base + size - 1 );
603 if (!mprotect( base, size, unix_prot | PROT_EXEC )) return 0;
604 /* exec + write may legitimately fail, in that case fall back to write only */
605 if (!(unix_prot & PROT_WRITE)) return -1;
606 }
607
608 return mprotect( base, size, unix_prot );
609 }
610
611 /***********************************************************************
612 * VIRTUAL_SetProt
613 *
614 * Change the protection of a range of pages.
615 *
616 * RETURNS
617 * TRUE: Success
618 * FALSE: Failure
619 */
620 static BOOL VIRTUAL_SetProt( struct file_view *view, /* [in] Pointer to view */
621 void *base, /* [in] Starting address */
622 size_t size, /* [in] Size in bytes */
623 BYTE vprot ) /* [in] Protections to use */
624 {
625 int unix_prot = VIRTUAL_GetUnixProt(vprot);
626 BYTE *p = view->prot + (((char *)base - (char *)view->base) >> page_shift);
627
628 TRACE("%p-%p %s\n",
629 base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
630
631 if (view->protect & VPROT_WRITEWATCH)
632 {
633 /* each page may need different protections depending on write watch flag */
634 UINT i, count;
635 char *addr = base;
636 int prot;
637
638 p[0] = vprot | (p[0] & VPROT_WRITEWATCH);
639 unix_prot = VIRTUAL_GetUnixProt( p[0] );
640 for (count = i = 1; i < size >> page_shift; i++, count++)
641 {
642 p[i] = vprot | (p[i] & VPROT_WRITEWATCH);
643 prot = VIRTUAL_GetUnixProt( p[i] );
644 if (prot == unix_prot) continue;
645 mprotect_exec( addr, count << page_shift, unix_prot, view->protect );
646 addr += count << page_shift;
647 unix_prot = prot;
648 count = 0;
649 }
650 if (count) mprotect_exec( addr, count << page_shift, unix_prot, view->protect );
651 VIRTUAL_DEBUG_DUMP_VIEW( view );
652 return TRUE;
653 }
654
655 /* if setting stack guard pages, store the permissions first, as the guard may be
656 * triggered at any point after mprotect and change the permissions again */
657 if ((vprot & VPROT_GUARD) &&
658 (base >= NtCurrentTeb()->DeallocationStack) &&
659 (base < NtCurrentTeb()->Tib.StackBase))
660 {
661 memset( p, vprot, size >> page_shift );
662 mprotect( base, size, unix_prot );
663 VIRTUAL_DEBUG_DUMP_VIEW( view );
664 return TRUE;
665 }
666
667 if (mprotect_exec( base, size, unix_prot, view->protect )) /* FIXME: last error */
668 return FALSE;
669
670 memset( p, vprot, size >> page_shift );
671 VIRTUAL_DEBUG_DUMP_VIEW( view );
672 return TRUE;
673 }
674
675
676 /***********************************************************************
677 * reset_write_watches
678 *
679 * Reset write watches in a memory range.
680 */
681 static void reset_write_watches( struct file_view *view, void *base, SIZE_T size )
682 {
683 SIZE_T i, count;
684 int prot, unix_prot;
685 char *addr = base;
686 BYTE *p = view->prot + ((addr - (char *)view->base) >> page_shift);
687
688 p[0] |= VPROT_WRITEWATCH;
689 unix_prot = VIRTUAL_GetUnixProt( p[0] );
690 for (count = i = 1; i < size >> page_shift; i++, count++)
691 {
692 p[i] |= VPROT_WRITEWATCH;
693 prot = VIRTUAL_GetUnixProt( p[i] );
694 if (prot == unix_prot) continue;
695 mprotect_exec( addr, count << page_shift, unix_prot, view->protect );
696 addr += count << page_shift;
697 unix_prot = prot;
698 count = 0;
699 }
700 if (count) mprotect_exec( addr, count << page_shift, unix_prot, view->protect );
701 }
702
703
704 /***********************************************************************
705 * unmap_extra_space
706 *
707 * Release the extra memory while keeping the range starting on the granularity boundary.
708 */
709 static inline void *unmap_extra_space( void *ptr, size_t total_size, size_t wanted_size, size_t mask )
710 {
711 if ((ULONG_PTR)ptr & mask)
712 {
713 size_t extra = mask + 1 - ((ULONG_PTR)ptr & mask);
714 munmap( ptr, extra );
715 ptr = (char *)ptr + extra;
716 total_size -= extra;
717 }
718 if (total_size > wanted_size)
719 munmap( (char *)ptr + wanted_size, total_size - wanted_size );
720 return ptr;
721 }
722
723
724 struct alloc_area
725 {
726 size_t size;
727 size_t mask;
728 int top_down;
729 void *limit;
730 void *result;
731 };
732
733 /***********************************************************************
734 * alloc_reserved_area_callback
735 *
736 * Try to map some space inside a reserved area. Callback for wine_mmap_enum_reserved_areas.
737 */
738 static int alloc_reserved_area_callback( void *start, size_t size, void *arg )
739 {
740 struct alloc_area *alloc = arg;
741 void *end = (char *)start + size;
742
743 if (start < address_space_start) start = address_space_start;
744 if (is_beyond_limit( start, size, alloc->limit )) end = alloc->limit;
745 if (start >= end) return 0;
746
747 /* make sure we don't touch the preloader reserved range */
748 if (preload_reserve_end >= start)
749 {
750 if (preload_reserve_end >= end)
751 {
752 if (preload_reserve_start <= start) return 0; /* no space in that area */
753 if (preload_reserve_start < end) end = preload_reserve_start;
754 }
755 else if (preload_reserve_start <= start) start = preload_reserve_end;
756 else
757 {
758 /* range is split in two by the preloader reservation, try first part */
759 if ((alloc->result = find_free_area( start, preload_reserve_start, alloc->size,
760 alloc->mask, alloc->top_down )))
761 return 1;
762 /* then fall through to try second part */
763 start = preload_reserve_end;
764 }
765 }
766 if ((alloc->result = find_free_area( start, end, alloc->size, alloc->mask, alloc->top_down )))
767 return 1;
768
769 return 0;
770 }
771
772
773 /***********************************************************************
774 * map_view
775 *
776 * Create a view and mmap the corresponding memory area.
777 * The csVirtual section must be held by caller.
778 */
779 static NTSTATUS map_view( struct file_view **view_ret, void *base, size_t size, size_t mask,
780 int top_down, unsigned int vprot )
781 {
782 void *ptr;
783 NTSTATUS status;
784
785 if (base)
786 {
787 if (is_beyond_limit( base, size, address_space_limit ))
788 return STATUS_WORKING_SET_LIMIT_RANGE;
789
790 switch (wine_mmap_is_in_reserved_area( base, size ))
791 {
792 case -1: /* partially in a reserved area */
793 return STATUS_CONFLICTING_ADDRESSES;
794
795 case 0: /* not in a reserved area, do a normal allocation */
796 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
797 {
798 if (errno == ENOMEM) return STATUS_NO_MEMORY;
799 return STATUS_INVALID_PARAMETER;
800 }
801 if (ptr != base)
802 {
803 /* We couldn't get the address we wanted */
804 if (is_beyond_limit( ptr, size, user_space_limit )) add_reserved_area( ptr, size );
805 else munmap( ptr, size );
806 return STATUS_CONFLICTING_ADDRESSES;
807 }
808 break;
809
810 default:
811 case 1: /* in a reserved area, make sure the address is available */
812 if (find_view_range( base, size )) return STATUS_CONFLICTING_ADDRESSES;
813 /* replace the reserved area by our mapping */
814 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED )) != base)
815 return STATUS_INVALID_PARAMETER;
816 break;
817 }
818 if (is_beyond_limit( ptr, size, working_set_limit )) working_set_limit = address_space_limit;
819 }
820 else
821 {
822 size_t view_size = size + mask + 1;
823 struct alloc_area alloc;
824
825 alloc.size = size;
826 alloc.mask = mask;
827 alloc.top_down = top_down;
828 alloc.limit = user_space_limit;
829 if (wine_mmap_enum_reserved_areas( alloc_reserved_area_callback, &alloc, top_down ))
830 {
831 ptr = alloc.result;
832 TRACE( "got mem in reserved area %p-%p\n", ptr, (char *)ptr + size );
833 if (wine_anon_mmap( ptr, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED ) != ptr)
834 return STATUS_INVALID_PARAMETER;
835 goto done;
836 }
837
838 for (;;)
839 {
840 if ((ptr = wine_anon_mmap( NULL, view_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
841 {
842 if (errno == ENOMEM) return STATUS_NO_MEMORY;
843 return STATUS_INVALID_PARAMETER;
844 }
845 TRACE( "got mem with anon mmap %p-%p\n", ptr, (char *)ptr + size );
846 /* if we got something beyond the user limit, unmap it and retry */
847 if (is_beyond_limit( ptr, view_size, user_space_limit )) add_reserved_area( ptr, view_size );
848 else break;
849 }
850 ptr = unmap_extra_space( ptr, view_size, size, mask );
851 }
852 done:
853 status = create_view( view_ret, ptr, size, vprot );
854 if (status != STATUS_SUCCESS) unmap_area( ptr, size );
855 return status;
856 }
857
858
859 /***********************************************************************
860 * map_file_into_view
861 *
862 * Wrapper for mmap() to map a file into a view, falling back to read if mmap fails.
863 * The csVirtual section must be held by caller.
864 */
865 static NTSTATUS map_file_into_view( struct file_view *view, int fd, size_t start, size_t size,
866 off_t offset, unsigned int vprot, BOOL removable )
867 {
868 void *ptr;
869 int prot = VIRTUAL_GetUnixProt( vprot | VPROT_COMMITTED /* make sure it is accessible */ );
870 unsigned int flags = MAP_FIXED | ((vprot & VPROT_WRITECOPY) ? MAP_PRIVATE : MAP_SHARED);
871
872 assert( start < view->size );
873 assert( start + size <= view->size );
874
875 if (force_exec_prot && !(vprot & VPROT_NOEXEC) && (vprot & VPROT_READ))
876 {
877 TRACE( "forcing exec permission on mapping %p-%p\n",
878 (char *)view->base + start, (char *)view->base + start + size - 1 );
879 prot |= PROT_EXEC;
880 }
881
882 /* only try mmap if media is not removable (or if we require write access) */
883 if (!removable || (flags & MAP_SHARED))
884 {
885 if (mmap( (char *)view->base + start, size, prot, flags, fd, offset ) != (void *)-1)
886 goto done;
887
888 if ((errno == EPERM) && (prot & PROT_EXEC))
889 ERR( "failed to set %08x protection on file map, noexec filesystem?\n", prot );
890
891 /* mmap() failed; if this is because the file offset is not */
892 /* page-aligned (EINVAL), or because the underlying filesystem */
893 /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
894 if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return FILE_GetNtStatus();
895 if (flags & MAP_SHARED) /* we cannot fake shared mappings */
896 {
897 if (errno == EINVAL) return STATUS_INVALID_PARAMETER;
898 ERR( "shared writable mmap not supported, broken filesystem?\n" );
899 return STATUS_NOT_SUPPORTED;
900 }
901 }
902
903 /* Reserve the memory with an anonymous mmap */
904 ptr = wine_anon_mmap( (char *)view->base + start, size, PROT_READ | PROT_WRITE, MAP_FIXED );
905 if (ptr == (void *)-1) return FILE_GetNtStatus();
906 /* Now read in the file */
907 pread( fd, ptr, size, offset );
908 if (prot != (PROT_READ|PROT_WRITE)) mprotect( ptr, size, prot ); /* Set the right protection */
909 done:
910 memset( view->prot + (start >> page_shift), vprot, ROUND_SIZE(start,size) >> page_shift );
911 return STATUS_SUCCESS;
912 }
913
914
915 /***********************************************************************
916 * get_committed_size
917 *
918 * Get the size of the committed range starting at base.
919 * Also return the protections for the first page.
920 */
921 static SIZE_T get_committed_size( struct file_view *view, void *base, BYTE *vprot )
922 {
923 SIZE_T i, start;
924
925 start = ((char *)base - (char *)view->base) >> page_shift;
926 *vprot = view->prot[start];
927
928 if (view->mapping && !(view->protect & VPROT_COMMITTED))
929 {
930 SIZE_T ret = 0;
931 SERVER_START_REQ( get_mapping_committed_range )
932 {
933 req->handle = wine_server_obj_handle( view->mapping );
934 req->offset = start << page_shift;
935 if (!wine_server_call( req ))
936 {
937 ret = reply->size;
938 if (reply->committed)
939 {
940 *vprot |= VPROT_COMMITTED;
941 for (i = 0; i < ret >> page_shift; i++) view->prot[start+i] |= VPROT_COMMITTED;
942 }
943 }
944 }
945 SERVER_END_REQ;
946 return ret;
947 }
948 for (i = start + 1; i < view->size >> page_shift; i++)
949 if ((*vprot ^ view->prot[i]) & VPROT_COMMITTED) break;
950 return (i - start) << page_shift;
951 }
952
953
954 /***********************************************************************
955 * decommit_view
956 *
957 * Decommit some pages of a given view.
958 * The csVirtual section must be held by caller.
959 */
960 static NTSTATUS decommit_pages( struct file_view *view, size_t start, size_t size )
961 {
962 if (wine_anon_mmap( (char *)view->base + start, size, PROT_NONE, MAP_FIXED ) != (void *)-1)
963 {
964 BYTE *p = view->prot + (start >> page_shift);
965 size >>= page_shift;
966 while (size--) *p++ &= ~VPROT_COMMITTED;
967 return STATUS_SUCCESS;
968 }
969 return FILE_GetNtStatus();
970 }
971
972
973 /***********************************************************************
974 * allocate_dos_memory
975 *
976 * Allocate the DOS memory range.
977 */
978 static NTSTATUS allocate_dos_memory( struct file_view **view, unsigned int vprot )
979 {
980 size_t size;
981 void *addr = NULL;
982 void * const low_64k = (void *)0x10000;
983 const size_t dosmem_size = 0x110000;
984 int unix_prot = VIRTUAL_GetUnixProt( vprot );
985 struct list *ptr;
986
987 /* check for existing view */
988
989 if ((ptr = list_head( &views_list )))
990 {
991 struct file_view *first_view = LIST_ENTRY( ptr, struct file_view, entry );
992 if (first_view->base < (void *)dosmem_size) return STATUS_CONFLICTING_ADDRESSES;
993 }
994
995 /* check without the first 64K */
996
997 if (wine_mmap_is_in_reserved_area( low_64k, dosmem_size - 0x10000 ) != 1)
998 {
999 addr = wine_anon_mmap( low_64k, dosmem_size - 0x10000, unix_prot, 0 );
1000 if (addr != low_64k)
1001 {
1002 if (addr != (void *)-1) munmap( addr, dosmem_size - 0x10000 );
1003 return map_view( view, NULL, dosmem_size, 0xffff, 0, vprot );
1004 }
1005 }
1006
1007 /* now try to allocate the low 64K too */
1008
1009 if (wine_mmap_is_in_reserved_area( NULL, 0x10000 ) != 1)
1010 {
1011 addr = wine_anon_mmap( (void *)page_size, 0x10000 - page_size, unix_prot, 0 );
1012 if (addr == (void *)page_size)
1013 {
1014 if (!wine_anon_mmap( NULL, page_size, unix_prot, MAP_FIXED ))
1015 {
1016 addr = NULL;
1017 TRACE( "successfully mapped low 64K range\n" );
1018 }
1019 else TRACE( "failed to map page 0\n" );
1020 }
1021 else
1022 {
1023 if (addr != (void *)-1) munmap( addr, 0x10000 - page_size );
1024 addr = low_64k;
1025 TRACE( "failed to map low 64K range\n" );
1026 }
1027 }
1028
1029 /* now reserve the whole range */
1030
1031 size = (char *)dosmem_size - (char *)addr;
1032 wine_anon_mmap( addr, size, unix_prot, MAP_FIXED );
1033 return create_view( view, addr, size, vprot );
1034 }
1035
1036
1037 /***********************************************************************
1038 * stat_mapping_file
1039 *
1040 * Stat the underlying file for a memory view.
1041 */
1042 static NTSTATUS stat_mapping_file( struct file_view *view, struct stat *st )
1043 {
1044 NTSTATUS status;
1045 int unix_fd, needs_close;
1046
1047 if (!view->mapping) return STATUS_NOT_MAPPED_VIEW;
1048 if (!(status = server_get_unix_fd( view->mapping, 0, &unix_fd, &needs_close, NULL, NULL )))
1049 {
1050 if (fstat( unix_fd, st ) == -1) status = FILE_GetNtStatus();
1051 if (needs_close) close( unix_fd );
1052 }
1053 return status;
1054 }
1055
1056 /***********************************************************************
1057 * map_image
1058 *
1059 * Map an executable (PE format) image into memory.
1060 */
1061 static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, SIZE_T total_size, SIZE_T mask,
1062 SIZE_T header_size, int shared_fd, HANDLE dup_mapping, unsigned int map_vprot, PVOID *addr_ptr )
1063 {
1064 IMAGE_DOS_HEADER *dos;
1065 IMAGE_NT_HEADERS *nt;
1066 IMAGE_SECTION_HEADER sections[96];
1067 IMAGE_SECTION_HEADER *sec;
1068 IMAGE_DATA_DIRECTORY *imports;
1069 NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
1070 int i;
1071 off_t pos;
1072 sigset_t sigset;
1073 struct stat st;
1074 struct file_view *view = NULL;
1075 char *ptr, *header_end, *header_start;
1076
1077 /* zero-map the whole range */
1078
1079 server_enter_uninterrupted_section( &csVirtual, &sigset );
1080
1081 if (base >= (char *)address_space_start) /* make sure the DOS area remains free */
1082 status = map_view( &view, base, total_size, mask, FALSE,
1083 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
1084
1085 if (status != STATUS_SUCCESS)
1086 status = map_view( &view, NULL, total_size, mask, FALSE,
1087 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
1088
1089 if (status != STATUS_SUCCESS) goto error;
1090
1091 ptr = view->base;
1092 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
1093
1094 /* map the header */
1095
1096 if (fstat( fd, &st ) == -1)
1097 {
1098 status = FILE_GetNtStatus();
1099 goto error;
1100 }
1101 status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
1102 if (!st.st_size) goto error;
1103 header_size = min( header_size, st.st_size );
1104 if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1105 !dup_mapping ) != STATUS_SUCCESS) goto error;
1106 dos = (IMAGE_DOS_HEADER *)ptr;
1107 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
1108 header_end = ptr + ROUND_SIZE( 0, header_size );
1109 memset( ptr + header_size, 0, header_end - (ptr + header_size) );
1110 if ((char *)(nt + 1) > header_end) goto error;
1111 header_start = (char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader;
1112 if (nt->FileHeader.NumberOfSections > sizeof(sections)/sizeof(*sections)) goto error;
1113 if (header_start + sizeof(*sections) * nt->FileHeader.NumberOfSections > header_end) goto error;
1114 /* Some applications (e.g. the Steam version of Borderlands) map over the top of the section headers,
1115 * copying the headers into local memory is necessary to properly load such applications. */
1116 memcpy(sections, header_start, sizeof(*sections) * nt->FileHeader.NumberOfSections);
1117 sec = sections;
1118
1119 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
1120 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
1121
1122 /* check for non page-aligned binary */
1123
1124 if (nt->OptionalHeader.SectionAlignment <= page_mask)
1125 {
1126 /* unaligned sections, this happens for native subsystem binaries */
1127 /* in that case Windows simply maps in the whole file */
1128
1129 if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1130 !dup_mapping ) != STATUS_SUCCESS) goto error;
1131
1132 /* check that all sections are loaded at the right offset */
1133 if (nt->OptionalHeader.FileAlignment != nt->OptionalHeader.SectionAlignment) goto error;
1134 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
1135 {
1136 if (sec[i].VirtualAddress != sec[i].PointerToRawData)
1137 goto error; /* Windows refuses to load in that case too */
1138 }
1139
1140 /* set the image protections */
1141 VIRTUAL_SetProt( view, ptr, total_size,
1142 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
1143
1144 /* no relocations are performed on non page-aligned binaries */
1145 goto done;
1146 }
1147
1148
1149 /* map all the sections */
1150
1151 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1152 {
1153 static const SIZE_T sector_align = 0x1ff;
1154 SIZE_T map_size, file_start, file_size, end;
1155
1156 if (!sec->Misc.VirtualSize)
1157 map_size = ROUND_SIZE( 0, sec->SizeOfRawData );
1158 else
1159 map_size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
1160
1161 /* file positions are rounded to sector boundaries regardless of OptionalHeader.FileAlignment */
1162 file_start = sec->PointerToRawData & ~sector_align;
1163 file_size = (sec->SizeOfRawData + (sec->PointerToRawData & sector_align) + sector_align) & ~sector_align;
1164 if (file_size > map_size) file_size = map_size;
1165
1166 /* a few sanity checks */
1167 end = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, map_size );
1168 if (sec->VirtualAddress > total_size || end > total_size || end < sec->VirtualAddress)
1169 {
1170 WARN_(module)( "Section %.8s too large (%x+%lx/%lx)\n",
1171 sec->Name, sec->VirtualAddress, map_size, total_size );
1172 goto error;
1173 }
1174
1175 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
1176 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
1177 {
1178 TRACE_(module)( "mapping shared section %.8s at %p off %x (%x) size %lx (%lx) flags %x\n",
1179 sec->Name, ptr + sec->VirtualAddress,
1180 sec->PointerToRawData, (int)pos, file_size, map_size,
1181 sec->Characteristics );
1182 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, map_size, pos,
1183 VPROT_COMMITTED | VPROT_READ | VPROT_WRITE, FALSE ) != STATUS_SUCCESS)
1184 {
1185 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
1186 goto error;
1187 }
1188
1189 /* check if the import directory falls inside this section */
1190 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
1191 imports->VirtualAddress < sec->VirtualAddress + map_size)
1192 {
1193 UINT_PTR base = imports->VirtualAddress & ~page_mask;
1194 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
1195 if (end > sec->VirtualAddress + map_size) end = sec->VirtualAddress + map_size;
1196 if (end > base)
1197 map_file_into_view( view, shared_fd, base, end - base,
1198 pos + (base - sec->VirtualAddress),
1199 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY, FALSE );
1200 }
1201 pos += map_size;
1202 continue;
1203 }
1204
1205 TRACE_(module)( "mapping section %.8s at %p off %x size %x virt %x flags %x\n",
1206 sec->Name, ptr + sec->VirtualAddress,
1207 sec->PointerToRawData, sec->SizeOfRawData,
1208 sec->Misc.VirtualSize, sec->Characteristics );
1209
1210 if (!sec->PointerToRawData || !file_size) continue;
1211
1212 /* Note: if the section is not aligned properly map_file_into_view will magically
1213 * fall back to read(), so we don't need to check anything here.
1214 */
1215 end = file_start + file_size;
1216 if (sec->PointerToRawData >= st.st_size ||
1217 end > ((st.st_size + sector_align) & ~sector_align) ||
1218 end < file_start ||
1219 map_file_into_view( view, fd, sec->VirtualAddress, file_size, file_start,
1220 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1221 !dup_mapping ) != STATUS_SUCCESS)
1222 {
1223 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
1224 goto error;
1225 }
1226
1227 if (file_size & page_mask)
1228 {
1229 end = ROUND_SIZE( 0, file_size );
1230 if (end > map_size) end = map_size;
1231 TRACE_(module)("clearing %p - %p\n",
1232 ptr + sec->VirtualAddress + file_size,
1233 ptr + sec->VirtualAddress + end );
1234 memset( ptr + sec->VirtualAddress + file_size, 0, end - file_size );
1235 }
1236 }
1237
1238 /* set the image protections */
1239
1240 VIRTUAL_SetProt( view, ptr, ROUND_SIZE( 0, header_size ), VPROT_COMMITTED | VPROT_READ );
1241
1242 sec = sections;
1243 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1244 {
1245 SIZE_T size;
1246 BYTE vprot = VPROT_COMMITTED;
1247
1248 if (sec->Misc.VirtualSize)
1249 size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
1250 else
1251 size = ROUND_SIZE( sec->VirtualAddress, sec->SizeOfRawData );
1252
1253 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
1254 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_WRITECOPY;
1255 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
1256
1257 /* Dumb game crack lets the AOEP point into a data section. Adjust. */
1258 if ((nt->OptionalHeader.AddressOfEntryPoint >= sec->VirtualAddress) &&
1259 (nt->OptionalHeader.AddressOfEntryPoint < sec->VirtualAddress + size))
1260 vprot |= VPROT_EXEC;
1261
1262 if (!VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot ) && (vprot & VPROT_EXEC))
1263 ERR( "failed to set %08x protection on section %.8s, noexec filesystem?\n",
1264 sec->Characteristics, sec->Name );
1265 }
1266
1267 done:
1268 view->mapping = dup_mapping;
1269 view->map_protect = map_vprot;
1270 server_leave_uninterrupted_section( &csVirtual, &sigset );
1271
1272 *addr_ptr = ptr;
1273 #ifdef VALGRIND_LOAD_PDB_DEBUGINFO
1274 VALGRIND_LOAD_PDB_DEBUGINFO(fd, ptr, total_size, ptr - base);
1275 #endif
1276 if (ptr != base) return STATUS_IMAGE_NOT_AT_BASE;
1277 return STATUS_SUCCESS;
1278
1279 error:
1280 if (view) delete_view( view );
1281 server_leave_uninterrupted_section( &csVirtual, &sigset );
1282 if (dup_mapping) NtClose( dup_mapping );
1283 return status;
1284 }
1285
1286
1287 /* callback for wine_mmap_enum_reserved_areas to allocate space for the virtual heap */
1288 static int alloc_virtual_heap( void *base, size_t size, void *arg )
1289 {
1290 void **heap_base = arg;
1291
1292 if (is_beyond_limit( base, size, address_space_limit )) address_space_limit = (char *)base + size;
1293 if (size < VIRTUAL_HEAP_SIZE) return 0;
1294 if (is_win64 && base < (void *)0x80000000) return 0;
1295 *heap_base = wine_anon_mmap( (char *)base + size - VIRTUAL_HEAP_SIZE,
1296 VIRTUAL_HEAP_SIZE, PROT_READ|PROT_WRITE, MAP_FIXED );
1297 return (*heap_base != (void *)-1);
1298 }
1299
1300 /***********************************************************************
1301 * virtual_init
1302 */
1303 void virtual_init(void)
1304 {
1305 const char *preload;
1306 void *heap_base;
1307 size_t size;
1308 struct file_view *heap_view;
1309
1310 #if !defined(__i386__) && !defined(__x86_64__)
1311 page_size = sysconf( _SC_PAGESIZE );
1312 page_mask = page_size - 1;
1313 /* Make sure we have a power of 2 */
1314 assert( !(page_size & page_mask) );
1315 page_shift = 0;
1316 while ((1 << page_shift) != page_size) page_shift++;
1317 user_space_limit = working_set_limit = address_space_limit = (void *)~page_mask;
1318 #endif /* page_mask */
1319 if ((preload = getenv("WINEPRELOADRESERVE")))
1320 {
1321 unsigned long start, end;
1322 if (sscanf( preload, "%lx-%lx", &start, &end ) == 2)
1323 {
1324 preload_reserve_start = (void *)start;
1325 preload_reserve_end = (void *)end;
1326 }
1327 }
1328
1329 /* try to find space in a reserved area for the virtual heap */
1330 if (!wine_mmap_enum_reserved_areas( alloc_virtual_heap, &heap_base, 1 ))
1331 heap_base = wine_anon_mmap( NULL, VIRTUAL_HEAP_SIZE, PROT_READ|PROT_WRITE, 0 );
1332
1333 assert( heap_base != (void *)-1 );
1334 virtual_heap = RtlCreateHeap( HEAP_NO_SERIALIZE, heap_base, VIRTUAL_HEAP_SIZE,
1335 VIRTUAL_HEAP_SIZE, NULL, NULL );
1336 create_view( &heap_view, heap_base, VIRTUAL_HEAP_SIZE, VPROT_COMMITTED | VPROT_READ | VPROT_WRITE );
1337
1338 /* make the DOS area accessible (except the low 64K) to hide bugs in broken apps like Excel 2003 */
1339 size = (char *)address_space_start - (char *)0x10000;
1340 if (size && wine_mmap_is_in_reserved_area( (void*)0x10000, size ) == 1)
1341 wine_anon_mmap( (void *)0x10000, size, PROT_READ | PROT_WRITE, MAP_FIXED );
1342 }
1343
1344
1345 /***********************************************************************
1346 * virtual_init_threading
1347 */
1348 void virtual_init_threading(void)
1349 {
1350 use_locks = TRUE;
1351 }
1352
1353
1354 /***********************************************************************
1355 * virtual_get_system_info
1356 */
1357 void virtual_get_system_info( SYSTEM_BASIC_INFORMATION *info )
1358 {
1359 info->unknown = 0;
1360 info->KeMaximumIncrement = 0; /* FIXME */
1361 info->PageSize = page_size;
1362 info->MmLowestPhysicalPage = 1;
1363 info->MmHighestPhysicalPage = 0x7fffffff / page_size;
1364 info->MmNumberOfPhysicalPages = info->MmHighestPhysicalPage - info->MmLowestPhysicalPage;
1365 info->AllocationGranularity = get_mask(0) + 1;
1366 info->LowestUserAddress = (void *)0x10000;
1367 info->HighestUserAddress = (char *)user_space_limit - 1;
1368 info->ActiveProcessorsAffinityMask = get_system_affinity_mask();
1369 info->NumberOfProcessors = NtCurrentTeb()->Peb->NumberOfProcessors;
1370 }
1371
1372
1373 /***********************************************************************
1374 * virtual_create_builtin_view
1375 */
1376 NTSTATUS virtual_create_builtin_view( void *module )
1377 {
1378 NTSTATUS status;
1379 sigset_t sigset;
1380 IMAGE_NT_HEADERS *nt = RtlImageNtHeader( module );
1381 SIZE_T size = nt->OptionalHeader.SizeOfImage;
1382 IMAGE_SECTION_HEADER *sec;
1383 struct file_view *view;
1384 void *base;
1385 int i;
1386
1387 size = ROUND_SIZE( module, size );
1388 base = ROUND_ADDR( module, page_mask );
1389 server_enter_uninterrupted_section( &csVirtual, &sigset );
1390 status = create_view( &view, base, size, VPROT_SYSTEM | VPROT_IMAGE |
1391 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
1392 if (!status) TRACE( "created %p-%p\n", base, (char *)base + size );
1393 server_leave_uninterrupted_section( &csVirtual, &sigset );
1394
1395 if (status) return status;
1396
1397 /* The PE header is always read-only, no write, no execute. */
1398 view->prot[0] = VPROT_COMMITTED | VPROT_READ;
1399
1400 sec = (IMAGE_SECTION_HEADER *)((char *)&nt->OptionalHeader + nt->FileHeader.SizeOfOptionalHeader);
1401 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
1402 {
1403 BYTE flags = VPROT_COMMITTED;
1404
1405 if (sec[i].Characteristics & IMAGE_SCN_MEM_EXECUTE) flags |= VPROT_EXEC;
1406 if (sec[i].Characteristics & IMAGE_SCN_MEM_READ) flags |= VPROT_READ;
1407 if (sec[i].Characteristics & IMAGE_SCN_MEM_WRITE) flags |= VPROT_WRITE;
1408 memset (view->prot + (sec[i].VirtualAddress >> page_shift), flags,
1409 ROUND_SIZE( sec[i].VirtualAddress, sec[i].Misc.VirtualSize ) >> page_shift );
1410 }
1411
1412 return status;
1413 }
1414
1415
1416 /***********************************************************************
1417 * virtual_alloc_thread_stack
1418 */
1419 NTSTATUS virtual_alloc_thread_stack( TEB *teb, SIZE_T reserve_size, SIZE_T commit_size )
1420 {
1421 struct file_view *view;
1422 NTSTATUS status;
1423 sigset_t sigset;
1424 SIZE_T size;
1425
1426 if (!reserve_size || !commit_size)
1427 {
1428 IMAGE_NT_HEADERS *nt = RtlImageNtHeader( NtCurrentTeb()->Peb->ImageBaseAddress );
1429 if (!reserve_size) reserve_size = nt->OptionalHeader.SizeOfStackReserve;
1430 if (!commit_size) commit_size = nt->OptionalHeader.SizeOfStackCommit;
1431 }
1432
1433 size = max( reserve_size, commit_size );
1434 if (size < 1024 * 1024) size = 1024 * 1024; /* Xlib needs a large stack */
1435 size = (size + 0xffff) & ~0xffff; /* round to 64K boundary */
1436
1437 server_enter_uninterrupted_section( &csVirtual, &sigset );
1438
1439 if ((status = map_view( &view, NULL, size, 0xffff, 0,
1440 VPROT_READ | VPROT_WRITE | VPROT_COMMITTED | VPROT_VALLOC )) != STATUS_SUCCESS)
1441 goto done;
1442
1443 #ifdef VALGRIND_STACK_REGISTER
1444 VALGRIND_STACK_REGISTER( view->base, (char *)view->base + view->size );
1445 #endif
1446
1447 /* setup no access guard page */
1448 VIRTUAL_SetProt( view, view->base, page_size, VPROT_COMMITTED );
1449 VIRTUAL_SetProt( view, (char *)view->base + page_size, page_size,
1450 VPROT_READ | VPROT_WRITE | VPROT_COMMITTED | VPROT_GUARD );
1451
1452 /* note: limit is lower than base since the stack grows down */
1453 teb->DeallocationStack = view->base;
1454 teb->Tib.StackBase = (char *)view->base + view->size;
1455 teb->Tib.StackLimit = (char *)view->base + 2 * page_size;
1456 done:
1457 server_leave_uninterrupted_section( &csVirtual, &sigset );
1458 return status;
1459 }
1460
1461
1462 /***********************************************************************
1463 * virtual_clear_thread_stack
1464 *
1465 * Clear the stack contents before calling the main entry point, some broken apps need that.
1466 */
1467 void virtual_clear_thread_stack(void)
1468 {
1469 void *stack = NtCurrentTeb()->Tib.StackLimit;
1470 size_t size = (char *)NtCurrentTeb()->Tib.StackBase - (char *)NtCurrentTeb()->Tib.StackLimit;
1471
1472 wine_anon_mmap( stack, size, PROT_READ | PROT_WRITE, MAP_FIXED );
1473 if (force_exec_prot) mprotect( stack, size, PROT_READ | PROT_WRITE | PROT_EXEC );
1474 }
1475
1476
1477 /***********************************************************************
1478 * virtual_handle_fault
1479 */
1480 NTSTATUS virtual_handle_fault( LPCVOID addr, DWORD err, BOOL on_signal_stack )
1481 {
1482 struct file_view *view;
1483 NTSTATUS ret = STATUS_ACCESS_VIOLATION;
1484 sigset_t sigset;
1485
1486 server_enter_uninterrupted_section( &csVirtual, &sigset );
1487 if ((view = VIRTUAL_FindView( addr, 0 )))
1488 {
1489 void *page = ROUND_ADDR( addr, page_mask );
1490 BYTE *vprot = &view->prot[((const char *)page - (const char *)view->base) >> page_shift];
1491 if ((err & EXCEPTION_WRITE_FAULT) && (view->protect & VPROT_WRITEWATCH))
1492 {
1493 if (*vprot & VPROT_WRITEWATCH)
1494 {
1495 *vprot &= ~VPROT_WRITEWATCH;
1496 VIRTUAL_SetProt( view, page, page_size, *vprot );
1497 }
1498 /* ignore fault if page is writable now */
1499 if (VIRTUAL_GetUnixProt( *vprot ) & PROT_WRITE) ret = STATUS_SUCCESS;
1500 }
1501 if (!on_signal_stack && (*vprot & VPROT_GUARD))
1502 {
1503 VIRTUAL_SetProt( view, page, page_size, *vprot & ~VPROT_GUARD );
1504 ret = STATUS_GUARD_PAGE_VIOLATION;
1505 }
1506 }
1507 server_leave_uninterrupted_section( &csVirtual, &sigset );
1508 return ret;
1509 }
1510
1511
1512
1513 /***********************************************************************
1514 * virtual_is_valid_code_address
1515 */
1516 BOOL virtual_is_valid_code_address( const void *addr, SIZE_T size )
1517 {
1518 struct file_view *view;
1519 BOOL ret = FALSE;
1520 sigset_t sigset;
1521
1522 server_enter_uninterrupted_section( &csVirtual, &sigset );
1523 if ((view = VIRTUAL_FindView( addr, size )))
1524 ret = !(view->protect & VPROT_SYSTEM); /* system views are not visible to the app */
1525 server_leave_uninterrupted_section( &csVirtual, &sigset );
1526 return ret;
1527 }
1528
1529
1530 /***********************************************************************
1531 * virtual_handle_stack_fault
1532 *
1533 * Handle an access fault inside the current thread stack.
1534 * Called from inside a signal handler.
1535 */
1536 BOOL virtual_handle_stack_fault( void *addr )
1537 {
1538 struct file_view *view;
1539 BOOL ret = FALSE;
1540
1541 RtlEnterCriticalSection( &csVirtual ); /* no need for signal masking inside signal handler */
1542 if ((view = VIRTUAL_FindView( addr, 0 )))
1543 {
1544 void *page = ROUND_ADDR( addr, page_mask );
1545 BYTE vprot = view->prot[((const char *)page - (const char *)view->base) >> page_shift];
1546 if (vprot & VPROT_GUARD)
1547 {
1548 VIRTUAL_SetProt( view, page, page_size, vprot & ~VPROT_GUARD );
1549 NtCurrentTeb()->Tib.StackLimit = page;
1550 if ((char *)page >= (char *)NtCurrentTeb()->DeallocationStack + 2*page_size)
1551 {
1552 vprot = view->prot[((char *)page - page_size - (char *)view->base) >> page_shift];
1553 VIRTUAL_SetProt( view, (char *)page - page_size, page_size, vprot | VPROT_GUARD );
1554 }
1555 ret = TRUE;
1556 }
1557 }
1558 RtlLeaveCriticalSection( &csVirtual );
1559 return ret;
1560 }
1561
1562
1563 /***********************************************************************
1564 * virtual_check_buffer_for_read
1565 *
1566 * Check if a memory buffer can be read, triggering page faults if needed for DIB section access.
1567 */
1568 BOOL virtual_check_buffer_for_read( const void *ptr, SIZE_T size )
1569 {
1570 if (!size) return TRUE;
1571 if (!ptr) return FALSE;
1572
1573 __TRY
1574 {
1575 volatile const char *p = ptr;
1576 char dummy __attribute__((unused));
1577 SIZE_T count = size;
1578
1579 while (count > page_size)
1580 {
1581 dummy = *p;
1582 p += page_size;
1583 count -= page_size;
1584 }
1585 dummy = p[0];
1586 dummy = p[count - 1];
1587 }
1588 __EXCEPT_PAGE_FAULT
1589 {
1590 return FALSE;
1591 }
1592 __ENDTRY
1593 return TRUE;
1594 }
1595
1596
1597 /***********************************************************************
1598 * virtual_check_buffer_for_write
1599 *
1600 * Check if a memory buffer can be written to, triggering page faults if needed for write watches.
1601 */
1602 BOOL virtual_check_buffer_for_write( void *ptr, SIZE_T size )
1603 {
1604 if (!size) return TRUE;
1605 if (!ptr) return FALSE;
1606
1607 __TRY
1608 {
1609 volatile char *p = ptr;
1610 SIZE_T count = size;
1611
1612 while (count > page_size)
1613 {
1614 *p |= 0;
1615 p += page_size;
1616 count -= page_size;
1617 }
1618 p[0] |= 0;
1619 p[count - 1] |= 0;
1620 }
1621 __EXCEPT_PAGE_FAULT
1622 {
1623 return FALSE;
1624 }
1625 __ENDTRY
1626 return TRUE;
1627 }
1628
1629
1630 /***********************************************************************
1631 * virtual_uninterrupted_read_memory
1632 *
1633 * Similar to NtReadVirtualMemory, but without wineserver calls. Moreover
1634 * permissions are checked before accessing each page, to ensure that no
1635 * exceptions can happen.
1636 */
1637 SIZE_T virtual_uninterrupted_read_memory( const void *addr, void *buffer, SIZE_T size )
1638 {
1639 struct file_view *view;
1640 sigset_t sigset;
1641 SIZE_T bytes_read = 0;
1642
1643 if (!size) return 0;
1644
1645 server_enter_uninterrupted_section( &csVirtual, &sigset );
1646 if ((view = VIRTUAL_FindView( addr, size )))
1647 {
1648 if (!(view->protect & VPROT_SYSTEM))
1649 {
1650 void *page = ROUND_ADDR( addr, page_mask );
1651 BYTE *p = view->prot + (((const char *)page - (const char *)view->base) >> page_shift);
1652
1653 while (bytes_read < size && (VIRTUAL_GetUnixProt( *p++ ) & PROT_READ))
1654 {
1655 SIZE_T block_size = min( size, page_size - ((UINT_PTR)addr & page_mask) );
1656 memcpy( buffer, addr, block_size );
1657
1658 addr = (const void *)((const char *)addr + block_size);
1659 buffer = (void *)((char *)buffer + block_size);
1660 bytes_read += block_size;
1661 }
1662 }
1663 }
1664 server_leave_uninterrupted_section( &csVirtual, &sigset );
1665 return bytes_read;
1666 }
1667
1668
1669 /***********************************************************************
1670 * virtual_uninterrupted_write_memory
1671 *
1672 * Similar to NtWriteVirtualMemory, but without wineserver calls. Moreover
1673 * permissions are checked before accessing each page, to ensure that no
1674 * exceptions can happen.
1675 */
1676 SIZE_T virtual_uninterrupted_write_memory( void *addr, const void *buffer, SIZE_T size )
1677 {
1678 struct file_view *view;
1679 sigset_t sigset;
1680 SIZE_T bytes_written = 0;
1681
1682 if (!size) return 0;
1683
1684 server_enter_uninterrupted_section( &csVirtual, &sigset );
1685 if ((view = VIRTUAL_FindView( addr, size )))
1686 {
1687 if (!(view->protect & VPROT_SYSTEM))
1688 {
1689 while (bytes_written < size)
1690 {
1691 void *page = ROUND_ADDR( addr, page_mask );
1692 BYTE *p = view->prot + (((const char *)page - (const char *)view->base) >> page_shift);
1693 SIZE_T block_size;
1694
1695 /* If the page is not writable then check for write watches
1696 * before giving up. This can be done without raising a real
1697 * exception. Similar to virtual_handle_fault. */
1698 if (!(VIRTUAL_GetUnixProt( *p ) & PROT_WRITE))
1699 {
1700 if (!(view->protect & VPROT_WRITEWATCH))
1701 break;
1702
1703 if (*p & VPROT_WRITEWATCH)
1704 {
1705 *p &= ~VPROT_WRITEWATCH;
1706 VIRTUAL_SetProt( view, page, page_size, *p );
1707 }
1708 /* ignore fault if page is writable now */
1709 if (!(VIRTUAL_GetUnixProt( *p ) & PROT_WRITE))
1710 break;
1711 }
1712
1713 block_size = min( size, page_size - ((UINT_PTR)addr & page_mask) );
1714 memcpy( addr, buffer, block_size );
1715
1716 addr = (void *)((char *)addr + block_size);
1717 buffer = (const void *)((const char *)buffer + block_size);
1718 bytes_written += block_size;
1719 }
1720 }
1721 }
1722 server_leave_uninterrupted_section( &csVirtual, &sigset );
1723 return bytes_written;
1724 }
1725
1726
1727 /***********************************************************************
1728 * VIRTUAL_SetForceExec
1729 *
1730 * Whether to force exec prot on all views.
1731 */
1732 void VIRTUAL_SetForceExec( BOOL enable )
1733 {
1734 struct file_view *view;
1735 sigset_t sigset;
1736
1737 server_enter_uninterrupted_section( &csVirtual, &sigset );
1738 if (!force_exec_prot != !enable) /* change all existing views */
1739 {
1740 force_exec_prot = enable;
1741
1742 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
1743 {
1744 UINT i, count;
1745 char *addr = view->base;
1746 BYTE commit = view->mapping ? VPROT_COMMITTED : 0; /* file mappings are always accessible */
1747 int unix_prot = VIRTUAL_GetUnixProt( view->prot[0] | commit );
1748
1749 if (view->protect & VPROT_NOEXEC) continue;
1750 for (count = i = 1; i < view->size >> page_shift; i++, count++)
1751 {
1752 int prot = VIRTUAL_GetUnixProt( view->prot[i] | commit );
1753 if (prot == unix_prot) continue;
1754 if ((unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
1755 {
1756 TRACE( "%s exec prot for %p-%p\n",
1757 force_exec_prot ? "enabling" : "disabling",
1758 addr, addr + (count << page_shift) - 1 );
1759 mprotect( addr, count << page_shift,
1760 unix_prot | (force_exec_prot ? PROT_EXEC : 0) );
1761 }
1762 addr += (count << page_shift);
1763 unix_prot = prot;
1764 count = 0;
1765 }
1766 if (count)
1767 {
1768 if ((unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
1769 {
1770 TRACE( "%s exec prot for %p-%p\n",
1771 force_exec_prot ? "enabling" : "disabling",
1772 addr, addr + (count << page_shift) - 1 );
1773 mprotect( addr, count << page_shift,
1774 unix_prot | (force_exec_prot ? PROT_EXEC : 0) );
1775 }
1776 }
1777 }
1778 }
1779 server_leave_uninterrupted_section( &csVirtual, &sigset );
1780 }
1781
1782 struct free_range
1783 {
1784 char *base;
1785 char *limit;
1786 };
1787
1788 /* free reserved areas above the limit; callback for wine_mmap_enum_reserved_areas */
1789 static int free_reserved_memory( void *base, size_t size, void *arg )
1790 {
1791 struct free_range *range = arg;
1792
1793 if ((char *)base >= range->limit) return 0;
1794 if ((char *)base + size <= range->base) return 0;
1795 if ((char *)base < range->base)
1796 {
1797 size -= range->base - (char *)base;
1798 base = range->base;
1799 }
1800 if ((char *)base + size > range->limit) size = range->limit - (char *)base;
1801 remove_reserved_area( base, size );
1802 return 1; /* stop enumeration since the list has changed */
1803 }
1804
1805 /***********************************************************************
1806 * virtual_release_address_space
1807 *
1808 * Release some address space once we have loaded and initialized the app.
1809 */
1810 void virtual_release_address_space(void)
1811 {
1812 struct free_range range;
1813 sigset_t sigset;
1814
1815 if (is_win64) return;
1816
1817 server_enter_uninterrupted_section( &csVirtual, &sigset );
1818
1819 range.base = (char *)0x82000000;
1820 range.limit = user_space_limit;
1821
1822 if (range.limit > range.base)
1823 {
1824 while (wine_mmap_enum_reserved_areas( free_reserved_memory, &range, 1 )) /* nothing */;
1825 }
1826 else
1827 {
1828 #ifndef __APPLE__ /* dyld doesn't support parts of the WINE_DOS segment being unmapped */
1829 range.base = (char *)0x20000000;
1830 range.limit = (char *)0x7f000000;
1831 while (wine_mmap_enum_reserved_areas( free_reserved_memory, &range, 0 )) /* nothing */;
1832 #endif
1833 }
1834
1835 server_leave_uninterrupted_section( &csVirtual, &sigset );
1836 }
1837
1838
1839 /***********************************************************************
1840 * virtual_set_large_address_space
1841 *
1842 * Enable use of a large address space when allowed by the application.
1843 */
1844 void virtual_set_large_address_space(void)
1845 {
1846 IMAGE_NT_HEADERS *nt = RtlImageNtHeader( NtCurrentTeb()->Peb->ImageBaseAddress );
1847
1848 if (!(nt->FileHeader.Characteristics & IMAGE_FILE_LARGE_ADDRESS_AWARE)) return;
1849 /* no large address space on win9x */
1850 if (NtCurrentTeb()->Peb->OSPlatformId != VER_PLATFORM_WIN32_NT) return;
1851
1852 user_space_limit = working_set_limit = address_space_limit;
1853 }
1854
1855
1856 /***********************************************************************
1857 * NtAllocateVirtualMemory (NTDLL.@)
1858 * ZwAllocateVirtualMemory (NTDLL.@)
1859 */
1860 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
1861 SIZE_T *size_ptr, ULONG type, ULONG protect )
1862 {
1863 void *base;
1864 unsigned int vprot;
1865 SIZE_T size = *size_ptr;
1866 SIZE_T mask = get_mask( zero_bits );
1867 NTSTATUS status = STATUS_SUCCESS;
1868 struct file_view *view;
1869 sigset_t sigset;
1870
1871 TRACE("%p %p %08lx %x %08x\n", process, *ret, size, type, protect );
1872
1873 if (!size) return STATUS_INVALID_PARAMETER;
1874
1875 if (process != NtCurrentProcess())
1876 {
1877 apc_call_t call;
1878 apc_result_t result;
1879
1880 memset( &call, 0, sizeof(call) );
1881
1882 call.virtual_alloc.type = APC_VIRTUAL_ALLOC;
1883 call.virtual_alloc.addr = wine_server_client_ptr( *ret );
1884 call.virtual_alloc.size = *size_ptr;
1885 call.virtual_alloc.zero_bits = zero_bits;
1886 call.virtual_alloc.op_type = type;
1887 call.virtual_alloc.prot = protect;
1888 status = server_queue_process_apc( process, &call, &result );
1889 if (status != STATUS_SUCCESS) return status;
1890
1891 if (result.virtual_alloc.status == STATUS_SUCCESS)
1892 {
1893 *ret = wine_server_get_ptr( result.virtual_alloc.addr );
1894 *size_ptr = result.virtual_alloc.size;
1895 }
1896 return result.virtual_alloc.status;
1897 }
1898
1899 /* Round parameters to a page boundary */
1900
1901 if (is_beyond_limit( 0, size, working_set_limit )) return STATUS_WORKING_SET_LIMIT_RANGE;
1902
1903 if ((status = get_vprot_flags( protect, &vprot, FALSE ))) return status;
1904 if (vprot & VPROT_WRITECOPY) return STATUS_INVALID_PAGE_PROTECTION;
1905 vprot |= VPROT_VALLOC;
1906 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
1907
1908 if (*ret)
1909 {
1910 if (type & MEM_RESERVE) /* Round down to 64k boundary */
1911 base = ROUND_ADDR( *ret, mask );
1912 else
1913 base = ROUND_ADDR( *ret, page_mask );
1914 size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1915
1916 /* address 1 is magic to mean DOS area */
1917 if (!base && *ret == (void *)1 && size == 0x110000)
1918 {
1919 server_enter_uninterrupted_section( &csVirtual, &sigset );
1920 status = allocate_dos_memory( &view, vprot );
1921 if (status == STATUS_SUCCESS)
1922 {
1923 *ret = view->base;
1924 *size_ptr = view->size;
1925 }
1926 server_leave_uninterrupted_section( &csVirtual, &sigset );
1927 return status;
1928 }
1929
1930 /* disallow low 64k, wrap-around and kernel space */
1931 if (((char *)base < (char *)0x10000) ||
1932 ((char *)base + size < (char *)base) ||
1933 is_beyond_limit( base, size, address_space_limit ))
1934 return STATUS_INVALID_PARAMETER;
1935 }
1936 else
1937 {
1938 base = NULL;
1939 size = (size + page_mask) & ~page_mask;
1940 }
1941
1942 /* Compute the alloc type flags */
1943
1944 if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_RESET)) ||
1945 (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_TOP_DOWN | MEM_WRITE_WATCH | MEM_RESET)))
1946 {
1947 WARN("called with wrong alloc type flags (%08x) !\n", type);
1948 return STATUS_INVALID_PARAMETER;
1949 }
1950
1951 /* Reserve the memory */
1952
1953 if (use_locks) server_enter_uninterrupted_section( &csVirtual, &sigset );
1954
1955 if ((type & MEM_RESERVE) || !base)
1956 {
1957 if (type & MEM_WRITE_WATCH) vprot |= VPROT_WRITEWATCH;
1958 status = map_view( &view, base, size, mask, type & MEM_TOP_DOWN, vprot );
1959 if (status == STATUS_SUCCESS) base = view->base;
1960 }
1961 else if (type & MEM_RESET)
1962 {
1963 if (!(view = VIRTUAL_FindView( base, size ))) status = STATUS_NOT_MAPPED_VIEW;
1964 else madvise( base, size, MADV_DONTNEED );
1965 }
1966 else /* commit the pages */
1967 {
1968 if (!(view = VIRTUAL_FindView( base, size ))) status = STATUS_NOT_MAPPED_VIEW;
1969 else if (view->mapping && (view->protect & VPROT_COMMITTED)) status = STATUS_ALREADY_COMMITTED;
1970 else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1971 else if (view->mapping && !(view->protect & VPROT_COMMITTED))
1972 {
1973 SERVER_START_REQ( add_mapping_committed_range )
1974 {
1975 req->handle = wine_server_obj_handle( view->mapping );
1976 req->offset = (char *)base - (char *)view->base;
1977 req->size = size;
1978 wine_server_call( req );
1979 }
1980 SERVER_END_REQ;
1981 }
1982 }
1983
1984 if (use_locks) server_leave_uninterrupted_section( &csVirtual, &sigset );
1985
1986 if (status == STATUS_SUCCESS)
1987 {
1988 *ret = base;
1989 *size_ptr = size;
1990 }
1991 return status;
1992 }
1993
1994
1995 /***********************************************************************
1996 * NtFreeVirtualMemory (NTDLL.@)
1997 * ZwFreeVirtualMemory (NTDLL.@)
1998 */
1999 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr, ULONG type )
2000 {
2001 struct file_view *view;
2002 char *base;
2003 sigset_t sigset;
2004 NTSTATUS status = STATUS_SUCCESS;
2005 LPVOID addr = *addr_ptr;
2006 SIZE_T size = *size_ptr;
2007
2008 TRACE("%p %p %08lx %x\n", process, addr, size, type );
2009
2010 if (process != NtCurrentProcess())
2011 {
2012 apc_call_t call;
2013 apc_result_t result;
2014
2015 memset( &call, 0, sizeof(call) );
2016
2017 call.virtual_free.type = APC_VIRTUAL_FREE;
2018 call.virtual_free.addr = wine_server_client_ptr( addr );
2019 call.virtual_free.size = size;
2020 call.virtual_free.op_type = type;
2021 status = server_queue_process_apc( process, &call, &result );
2022 if (status != STATUS_SUCCESS) return status;
2023
2024 if (result.virtual_free.status == STATUS_SUCCESS)
2025 {
2026 *addr_ptr = wine_server_get_ptr( result.virtual_free.addr );
2027 *size_ptr = result.virtual_free.size;
2028 }
2029 return result.virtual_free.status;
2030 }
2031
2032 /* Fix the parameters */
2033
2034 size = ROUND_SIZE( addr, size );
2035 base = ROUND_ADDR( addr, page_mask );
2036
2037 /* avoid freeing the DOS area when a broken app passes a NULL pointer */
2038 if (!base) return STATUS_INVALID_PARAMETER;
2039
2040 server_enter_uninterrupted_section( &csVirtual, &sigset );
2041
2042 if (!(view = VIRTUAL_FindView( base, size )) || !(view->protect & VPROT_VALLOC))
2043 {
2044 status = STATUS_INVALID_PARAMETER;
2045 }
2046 else if (type == MEM_RELEASE)
2047 {
2048 /* Free the pages */
2049
2050 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
2051 else
2052 {
2053 delete_view( view );
2054 *addr_ptr = base;
2055 *size_ptr = size;
2056 }
2057 }
2058 else if (type == MEM_DECOMMIT)
2059 {
2060 status = decommit_pages( view, base - (char *)view->base, size );
2061 if (status == STATUS_SUCCESS)
2062 {
2063 *addr_ptr = base;
2064 *size_ptr = size;
2065 }
2066 }
2067 else
2068 {
2069 WARN("called with wrong free type flags (%08x) !\n", type);
2070 status = STATUS_INVALID_PARAMETER;
2071 }
2072
2073 server_leave_uninterrupted_section( &csVirtual, &sigset );
2074 return status;
2075 }
2076
2077 static ULONG map_protection_to_access( ULONG vprot )
2078 {
2079 vprot &= VPROT_READ | VPROT_WRITE | VPROT_EXEC | VPROT_WRITECOPY;
2080 if (vprot & VPROT_EXEC)
2081 {
2082 if (vprot & VPROT_WRITE) vprot |= VPROT_WRITECOPY;
2083 }
2084 else vprot &= ~VPROT_WRITECOPY;
2085 return vprot;
2086 }
2087
2088 static BOOL is_compatible_protection( const struct file_view *view, ULONG new_prot )
2089 {
2090 ULONG view_prot, map_prot;
2091
2092 view_prot = map_protection_to_access( view->protect );
2093 new_prot = map_protection_to_access( new_prot );
2094
2095 if (view_prot == new_prot) return TRUE;
2096 if (!view_prot) return FALSE;
2097
2098 if ((view_prot & new_prot) != new_prot) return FALSE;
2099
2100 map_prot = map_protection_to_access( view->map_protect );
2101 if ((map_prot & new_prot) == new_prot) return TRUE;
2102
2103 return FALSE;
2104 }
2105
2106 /***********************************************************************
2107 * NtProtectVirtualMemory (NTDLL.@)
2108 * ZwProtectVirtualMemory (NTDLL.@)
2109 */
2110 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr,
2111 ULONG new_prot, ULONG *old_prot )
2112 {
2113 struct file_view *view;
2114 sigset_t sigset;
2115 NTSTATUS status = STATUS_SUCCESS;
2116 char *base;
2117 BYTE vprot;
2118 unsigned int new_vprot;
2119 SIZE_T size = *size_ptr;
2120 LPVOID addr = *addr_ptr;
2121
2122 TRACE("%p %p %08lx %08x\n", process, addr, size, new_prot );
2123
2124 if (!old_prot)
2125 return STATUS_ACCESS_VIOLATION;
2126
2127 if (process != NtCurrentProcess())
2128 {
2129 apc_call_t call;
2130 apc_result_t result;
2131
2132 memset( &call, 0, sizeof(call) );
2133
2134 call.virtual_protect.type = APC_VIRTUAL_PROTECT;
2135 call.virtual_protect.addr = wine_server_client_ptr( addr );
2136 call.virtual_protect.size = size;
2137 call.virtual_protect.prot = new_prot;
2138 status = server_queue_process_apc( process, &call, &result );
2139 if (status != STATUS_SUCCESS) return status;
2140
2141 if (result.virtual_protect.status == STATUS_SUCCESS)
2142 {
2143 *addr_ptr = wine_server_get_ptr( result.virtual_protect.addr );
2144 *size_ptr = result.virtual_protect.size;
2145 if (old_prot) *old_prot = result.virtual_protect.prot;
2146 }
2147 return result.virtual_protect.status;
2148 }
2149
2150 /* Fix the parameters */
2151
2152 size = ROUND_SIZE( addr, size );
2153 base = ROUND_ADDR( addr, page_mask );
2154
2155 server_enter_uninterrupted_section( &csVirtual, &sigset );
2156
2157 if ((view = VIRTUAL_FindView( base, size )))
2158 {
2159 /* Make sure all the pages are committed */
2160 if (get_committed_size( view, base, &vprot ) >= size && (vprot & VPROT_COMMITTED))
2161 {
2162 if (!(status = get_vprot_flags( new_prot, &new_vprot, view->protect & VPROT_IMAGE )))
2163 {
2164 if ((new_vprot & VPROT_WRITECOPY) && (view->protect & VPROT_VALLOC))
2165 status = STATUS_INVALID_PAGE_PROTECTION;
2166 else
2167 {
2168 if (!view->mapping || is_compatible_protection( view, new_vprot ))
2169 {
2170 new_vprot |= VPROT_COMMITTED;
2171 if (old_prot) *old_prot = VIRTUAL_GetWin32Prot( vprot );
2172 if (!VIRTUAL_SetProt( view, base, size, new_vprot )) status = STATUS_ACCESS_DENIED;
2173 }
2174 else status = STATUS_INVALID_PAGE_PROTECTION;
2175 }
2176 }
2177 }
2178 else status = STATUS_NOT_COMMITTED;
2179 }
2180 else status = STATUS_INVALID_PARAMETER;
2181
2182 server_leave_uninterrupted_section( &csVirtual, &sigset );
2183
2184 if (status == STATUS_SUCCESS)
2185 {
2186 *addr_ptr = base;
2187 *size_ptr = size;
2188 }
2189 return status;
2190 }
2191
2192
2193 /* retrieve state for a free memory area; callback for wine_mmap_enum_reserved_areas */
2194 static int get_free_mem_state_callback( void *start, size_t size, void *arg )
2195 {
2196 MEMORY_BASIC_INFORMATION *info = arg;
2197 void *end = (char *)start + size;
2198
2199 if ((char *)info->BaseAddress + info->RegionSize < (char *)start) return 0;
2200
2201 if (info->BaseAddress >= end)
2202 {
2203 if (info->AllocationBase < end) info->AllocationBase = end;
2204 return 0;
2205 }
2206
2207 if (info->BaseAddress >= start || start <= address_space_start)
2208 {
2209 /* it's a real free area */
2210 info->State = MEM_FREE;
2211 info->Protect = PAGE_NOACCESS;
2212 info->AllocationBase = 0;
2213 info->AllocationProtect = 0;
2214 info->Type = 0;
2215 if ((char *)info->BaseAddress + info->RegionSize > (char *)end)
2216 info->RegionSize = (char *)end - (char *)info->BaseAddress;
2217 }
2218 else /* outside of the reserved area, pretend it's allocated */
2219 {
2220 info->RegionSize = (char *)start - (char *)info->BaseAddress;
2221 info->State = MEM_RESERVE;
2222 info->Protect = PAGE_NOACCESS;
2223 info->AllocationProtect = PAGE_NOACCESS;
2224 info->Type = MEM_PRIVATE;
2225 }
2226 return 1;
2227 }
2228
2229 #define UNIMPLEMENTED_INFO_CLASS(c) \
2230 case c: \
2231 FIXME("(process=%p,addr=%p) Unimplemented information class: " #c "\n", process, addr); \
2232 return STATUS_INVALID_INFO_CLASS
2233
2234 /***********************************************************************
2235 * NtQueryVirtualMemory (NTDLL.@)
2236 * ZwQueryVirtualMemory (NTDLL.@)
2237 */
2238 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
2239 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
2240 SIZE_T len, SIZE_T *res_len )
2241 {
2242 struct file_view *view;
2243 char *base, *alloc_base = 0;
2244 struct list *ptr;
2245 SIZE_T size = 0;
2246 MEMORY_BASIC_INFORMATION *info = buffer;
2247 sigset_t sigset;
2248
2249 if (info_class != MemoryBasicInformation)
2250 {
2251 switch(info_class)
2252 {
2253 UNIMPLEMENTED_INFO_CLASS(MemoryWorkingSetList);
2254 UNIMPLEMENTED_INFO_CLASS(MemorySectionName);
2255 UNIMPLEMENTED_INFO_CLASS(MemoryBasicVlmInformation);
2256
2257 default:
2258 FIXME("(%p,%p,info_class=%d,%p,%ld,%p) Unknown information class\n",
2259 process, addr, info_class, buffer, len, res_len);
2260 return STATUS_INVALID_INFO_CLASS;
2261 }
2262 }
2263
2264 if (process != NtCurrentProcess())
2265 {
2266 NTSTATUS status;
2267 apc_call_t call;
2268 apc_result_t result;
2269
2270 memset( &call, 0, sizeof(call) );
2271
2272 call.virtual_query.type = APC_VIRTUAL_QUERY;
2273 call.virtual_query.addr = wine_server_client_ptr( addr );
2274 status = server_queue_process_apc( process, &call, &result );
2275 if (status != STATUS_SUCCESS) return status;
2276
2277 if (result.virtual_query.status == STATUS_SUCCESS)
2278 {
2279 info->BaseAddress = wine_server_get_ptr( result.virtual_query.base );
2280 info->AllocationBase = wine_server_get_ptr( result.virtual_query.alloc_base );
2281 info->RegionSize = result.virtual_query.size;
2282 info->Protect = result.virtual_query.prot;
2283 info->AllocationProtect = result.virtual_query.alloc_prot;
2284 info->State = (DWORD)result.virtual_query.state << 12;
2285 info->Type = (DWORD)result.virtual_query.alloc_type << 16;
2286 if (info->RegionSize != result.virtual_query.size) /* truncated */
2287 return STATUS_INVALID_PARAMETER; /* FIXME */
2288 if (res_len) *res_len = sizeof(*info);
2289 }
2290 return result.virtual_query.status;
2291 }
2292
2293 base = ROUND_ADDR( addr, page_mask );
2294
2295 if (is_beyond_limit( base, 1, working_set_limit )) return STATUS_WORKING_SET_LIMIT_RANGE;
2296
2297 /* Find the view containing the address */
2298
2299 server_enter_uninterrupted_section( &csVirtual, &sigset );
2300 ptr = list_head( &views_list );
2301 for (;;)
2302 {
2303 if (!ptr)
2304 {
2305 size = (char *)working_set_limit - alloc_base;
2306 view = NULL;
2307 break;
2308 }
2309 view = LIST_ENTRY( ptr, struct file_view, entry );
2310 if ((char *)view->base > base)
2311 {
2312 size = (char *)view->base - alloc_base;
2313 view = NULL;
2314 break;
2315 }
2316 if ((char *)view->base + view->size > base)
2317 {
2318 alloc_base = view->base;
2319 size = view->size;
2320 break;
2321 }
2322 alloc_base = (char *)view->base + view->size;
2323 ptr = list_next( &views_list, ptr );
2324 }
2325
2326 /* Fill the info structure */
2327
2328 info->AllocationBase = alloc_base;
2329 info->BaseAddress = base;
2330 info->RegionSize = size - (base - alloc_base);
2331
2332 if (!view)
2333 {
2334 if (!wine_mmap_enum_reserved_areas( get_free_mem_state_callback, info, 0 ))
2335 {
2336 /* not in a reserved area at all, pretend it's allocated */
2337 #ifdef __i386__
2338 if (base >= (char *)address_space_start)
2339 {
2340 info->State = MEM_RESERVE;
2341 info->Protect = PAGE_NOACCESS;
2342 info->AllocationProtect = PAGE_NOACCESS;
2343 info->Type = MEM_PRIVATE;
2344 }
2345 else
2346 #endif
2347 {
2348 info->State = MEM_FREE;
2349 info->Protect = PAGE_NOACCESS;
2350 info->AllocationBase = 0;
2351 info->AllocationProtect = 0;
2352 info->Type = 0;
2353 }
2354 }
2355 }
2356 else
2357 {
2358 BYTE vprot;
2359 SIZE_T range_size = get_committed_size( view, base, &vprot );
2360
2361 info->State = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
2362 info->Protect = (vprot & VPROT_COMMITTED) ? VIRTUAL_GetWin32Prot( vprot ) : 0;
2363 info->AllocationBase = alloc_base;
2364 info->AllocationProtect = VIRTUAL_GetWin32Prot( view->protect );
2365 if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
2366 else if (view->protect & VPROT_VALLOC) info->Type = MEM_PRIVATE;
2367 else info->Type = MEM_MAPPED;
2368 for (size = base - alloc_base; size < base + range_size - alloc_base; size += page_size)
2369 if ((view->prot[size >> page_shift] ^ vprot) & ~VPROT_WRITEWATCH) break;
2370 info->RegionSize = size - (base - alloc_base);
2371 }
2372 server_leave_uninterrupted_section( &csVirtual, &sigset );
2373
2374 if (res_len) *res_len = sizeof(*info);
2375 return STATUS_SUCCESS;
2376 }
2377
2378
2379 /***********************************************************************
2380 * NtLockVirtualMemory (NTDLL.@)
2381 * ZwLockVirtualMemory (NTDLL.@)
2382 */
2383 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
2384 {
2385 NTSTATUS status = STATUS_SUCCESS;
2386
2387 if (process != NtCurrentProcess())
2388 {
2389 apc_call_t call;
2390 apc_result_t result;
2391
2392 memset( &call, 0, sizeof(call) );
2393
2394 call.virtual_lock.type = APC_VIRTUAL_LOCK;
2395 call.virtual_lock.addr = wine_server_client_ptr( *addr );
2396 call.virtual_lock.size = *size;
2397 status = server_queue_process_apc( process, &call, &result );
2398 if (status != STATUS_SUCCESS) return status;
2399
2400 if (result.virtual_lock.status == STATUS_SUCCESS)
2401 {
2402 *addr = wine_server_get_ptr( result.virtual_lock.addr );
2403 *size = result.virtual_lock.size;
2404 }
2405 return result.virtual_lock.status;
2406 }
2407
2408 *size = ROUND_SIZE( *addr, *size );
2409 *addr = ROUND_ADDR( *addr, page_mask );
2410
2411 if (mlock( *addr, *size )) status = STATUS_ACCESS_DENIED;
2412 return status;
2413 }
2414
2415
2416 /***********************************************************************
2417 * NtUnlockVirtualMemory (NTDLL.@)
2418 * ZwUnlockVirtualMemory (NTDLL.@)
2419 */
2420 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
2421 {
2422 NTSTATUS status = STATUS_SUCCESS;
2423
2424 if (process != NtCurrentProcess())
2425 {
2426 apc_call_t call;
2427 apc_result_t result;
2428
2429 memset( &call, 0, sizeof(call) );
2430
2431 call.virtual_unlock.type = APC_VIRTUAL_UNLOCK;
2432 call.virtual_unlock.addr = wine_server_client_ptr( *addr );
2433 call.virtual_unlock.size = *size;
2434 status = server_queue_process_apc( process, &call, &result );
2435 if (status != STATUS_SUCCESS) return status;
2436
2437 if (result.virtual_unlock.status == STATUS_SUCCESS)
2438 {
2439 *addr = wine_server_get_ptr( result.virtual_unlock.addr );
2440 *size = result.virtual_unlock.size;
2441 }
2442 return result.virtual_unlock.status;
2443 }
2444
2445 *size = ROUND_SIZE( *addr, *size );
2446 *addr = ROUND_ADDR( *addr, page_mask );
2447
2448 if (munlock( *addr, *size )) status = STATUS_ACCESS_DENIED;
2449 return status;
2450 }
2451
2452
2453 /***********************************************************************
2454 * NtCreateSection (NTDLL.@)
2455 * ZwCreateSection (NTDLL.@)
2456 */
2457 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
2458 const LARGE_INTEGER *size, ULONG protect,
2459 ULONG sec_flags, HANDLE file )
2460 {
2461 NTSTATUS ret;
2462 unsigned int vprot;
2463 DWORD len = (attr && attr->ObjectName) ? attr->ObjectName->Length : 0;
2464 struct security_descriptor *sd = NULL;
2465 struct object_attributes objattr;
2466
2467 /* Check parameters */
2468
2469 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
2470
2471 if ((ret = get_vprot_flags( protect, &vprot, sec_flags & SEC_IMAGE ))) return ret;
2472
2473 objattr.rootdir = wine_server_obj_handle( attr ? attr->RootDirectory : 0 );
2474 objattr.sd_len = 0;
2475 objattr.name_len = len;
2476 if (attr)
2477 {
2478 ret = NTDLL_create_struct_sd( attr->SecurityDescriptor, &sd, &objattr.sd_len );
2479 if (ret != STATUS_SUCCESS) return ret;
2480 }
2481
2482 if (!(sec_flags & SEC_RESERVE)) vprot |= VPROT_COMMITTED;
2483 if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
2484 if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
2485
2486 /* Create the server object */
2487
2488 SERVER_START_REQ( create_mapping )
2489 {
2490 req->access = access;
2491 req->attributes = (attr) ? attr->Attributes : 0;
2492 req->file_handle = wine_server_obj_handle( file );
2493 req->size = size ? size->QuadPart : 0;
2494 req->protect = vprot;
2495 wine_server_add_data( req, &objattr, sizeof(objattr) );
2496 if (objattr.sd_len) wine_server_add_data( req, sd, objattr.sd_len );
2497 if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
2498 ret = wine_server_call( req );
2499 *handle = wine_server_ptr_handle( reply->handle );
2500 }
2501 SERVER_END_REQ;
2502
2503 NTDLL_free_struct_sd( sd );
2504
2505 return ret;
2506 }
2507
2508
2509 /***********************************************************************
2510 * NtOpenSection (NTDLL.@)
2511 * ZwOpenSection (NTDLL.@)
2512 */
2513 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
2514 {
2515 NTSTATUS ret;
2516 DWORD len = attr->ObjectName->Length;
2517
2518 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
2519
2520 SERVER_START_REQ( open_mapping )
2521 {
2522 req->access = access;
2523 req->attributes = attr->Attributes;
2524 req->rootdir = wine_server_obj_handle( attr->RootDirectory );
2525 wine_server_add_data( req, attr->ObjectName->Buffer, len );
2526 if (!(ret = wine_server_call( req ))) *handle = wine_server_ptr_handle( reply->handle );
2527 }
2528 SERVER_END_REQ;
2529 return ret;
2530 }
2531
2532
2533 /***********************************************************************
2534 * NtMapViewOfSection (NTDLL.@)
2535 * ZwMapViewOfSection (NTDLL.@)
2536 */
2537 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
2538 SIZE_T commit_size, const LARGE_INTEGER *offset_ptr, SIZE_T *size_ptr,
2539 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
2540 {
2541 NTSTATUS res;
2542 mem_size_t full_size;
2543 ACCESS_MASK access;
2544 SIZE_T size, mask = get_mask( zero_bits );
2545 int unix_handle = -1, needs_close;
2546 unsigned int map_vprot, vprot;
2547 void *base;
2548 struct file_view *view;
2549 DWORD header_size;
2550 HANDLE dup_mapping, shared_file;
2551 LARGE_INTEGER offset;
2552 sigset_t sigset;
2553
2554 offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
2555
2556 TRACE("handle=%p process=%p addr=%p off=%x%08x size=%lx access=%x\n",
2557 handle, process, *addr_ptr, offset.u.HighPart, offset.u.LowPart, *size_ptr, protect );
2558
2559 /* Check parameters */
2560
2561 if (*addr_ptr && zero_bits)
2562 return STATUS_INVALID_PARAMETER_4;
2563
2564 #ifndef _WIN64
2565 if (!is_wow64 && (alloc_type & AT_ROUND_TO_PAGE))
2566 {
2567 *addr_ptr = ROUND_ADDR( *addr_ptr, page_mask );
2568 mask = page_mask;
2569 }
2570 #endif
2571
2572 if ((offset.u.LowPart & mask) || (*addr_ptr && ((UINT_PTR)*addr_ptr & mask)))
2573 return STATUS_MAPPED_ALIGNMENT;
2574
2575 switch(protect)
2576 {
2577 case PAGE_NOACCESS:
2578 access = SECTION_MAP_READ;
2579 break;
2580 case PAGE_READWRITE:
2581 case PAGE_EXECUTE_READWRITE:
2582 access = SECTION_MAP_WRITE;
2583 break;
2584 case PAGE_READONLY:
2585 case PAGE_WRITECOPY:
2586 case PAGE_EXECUTE:
2587 case PAGE_EXECUTE_READ:
2588 case PAGE_EXECUTE_WRITECOPY:
2589 access = SECTION_MAP_READ;
2590 break;
2591 default:
2592 return STATUS_INVALID_PAGE_PROTECTION;
2593 }
2594
2595 if (process != NtCurrentProcess())
2596 {
2597 apc_call_t call;
2598 apc_result_t result;
2599
2600 memset( &call, 0, sizeof(call) );
2601
2602 call.map_view.type = APC_MAP_VIEW;
2603 call.map_view.handle = wine_server_obj_handle( handle );
2604 call.map_view.addr = wine_server_client_ptr( *addr_ptr );
2605 call.map_view.size = *size_ptr;
2606 call.map_view.offset = offset.QuadPart;
2607 call.map_view.zero_bits = zero_bits;
2608 call.map_view.alloc_type = alloc_type;
2609 call.map_view.prot = protect;
2610 res = server_queue_process_apc( process, &call, &result );
2611 if (res != STATUS_SUCCESS) return res;
2612
2613 if ((NTSTATUS)result.map_view.status >= 0)
2614 {
2615 *addr_ptr = wine_server_get_ptr( result.map_view.addr );
2616 *size_ptr = result.map_view.size;
2617 }
2618 return result.map_view.status;
2619 }
2620
2621 SERVER_START_REQ( get_mapping_info )
2622 {
2623 req->handle = wine_server_obj_handle( handle );
2624 req->access = access;
2625 res = wine_server_call( req );
2626 map_vprot = reply->protect;
2627 base = wine_server_get_ptr( reply->base );
2628 full_size = reply->size;
2629 header_size = reply->header_size;
2630 dup_mapping = wine_server_ptr_handle( reply->mapping );
2631 shared_file = wine_server_ptr_handle( reply->shared_file );
2632 if ((ULONG_PTR)base != reply->base) base = NULL;
2633 }
2634 SERVER_END_REQ;
2635 if (res) return res;
2636
2637 if ((res = server_get_unix_fd( handle, 0, &unix_handle, &needs_close, NULL, NULL ))) goto done;
2638
2639 if (map_vprot & VPROT_IMAGE)
2640 {
2641 size = full_size;
2642 if (size != full_size) /* truncated */
2643 {
2644 WARN( "Modules larger than 4Gb (%s) not supported\n", wine_dbgstr_longlong(full_size) );
2645 res = STATUS_INVALID_PARAMETER;
2646 goto done;
2647 }
2648 if (shared_file)
2649 {
2650 int shared_fd, shared_needs_close;
2651
2652 if ((res = server_get_unix_fd( shared_file, FILE_READ_DATA|FILE_WRITE_DATA,
2653 &shared_fd, &shared_needs_close, NULL, NULL ))) goto done;
2654 res = map_image( handle, unix_handle, base, size, mask, header_size,
2655 shared_fd, dup_mapping, map_vprot, addr_ptr );
2656 if (shared_needs_close) close( shared_fd );
2657 NtClose( shared_file );
2658 }
2659 else
2660 {
2661 res = map_image( handle, unix_handle, base, size, mask, header_size,
2662 -1, dup_mapping, map_vprot, addr_ptr );
2663 }
2664 if (needs_close) close( unix_handle );
2665 if (res >= 0) *size_ptr = size;
2666 return res;
2667 }
2668
2669 res = STATUS_INVALID_PARAMETER;
2670 if (offset.QuadPart >= full_size) goto done;
2671 if (*size_ptr)
2672 {
2673 if (*size_ptr > full_size - offset.QuadPart) goto done;
2674 size = ROUND_SIZE( offset.u.LowPart, *size_ptr );
2675 if (size < *size_ptr) goto done; /* wrap-around */
2676 }
2677 else
2678 {
2679 size = full_size - offset.QuadPart;
2680 if (size != full_size - offset.QuadPart) /* truncated */
2681 {
2682 WARN( "Files larger than 4Gb (%s) not supported on this platform\n",
2683 wine_dbgstr_longlong(full_size) );
2684 goto done;
2685 }
2686 }
2687
2688 /* Reserve a properly aligned area */
2689
2690 server_enter_uninterrupted_section( &csVirtual, &sigset );
2691
2692 get_vprot_flags( protect, &vprot, map_vprot & VPROT_IMAGE );
2693 vprot |= (map_vprot & VPROT_COMMITTED);
2694 res = map_view( &view, *addr_ptr, size, mask, FALSE, vprot );
2695 if (res)
2696 {
2697 server_leave_uninterrupted_section( &csVirtual, &sigset );
2698 goto done;
2699 }
2700
2701 /* Map the file */
2702
2703 TRACE("handle=%p size=%lx offset=%x%08x\n",
2704 handle, size, offset.u.HighPart, offset.u.LowPart );
2705
2706 res = map_file_into_view( view, unix_handle, 0, size, offset.QuadPart, vprot, !dup_mapping );
2707 if (res == STATUS_SUCCESS)
2708 {
2709 *addr_ptr = view->base;
2710 *size_ptr = size;
2711 view->mapping = dup_mapping;
2712 view->map_protect = map_vprot;
2713 dup_mapping = 0; /* don't close it */
2714 }
2715 else
2716 {
2717 ERR( "map_file_into_view %p %lx %x%08x failed\n",
2718 view->base, size, offset.u.HighPart, offset.u.LowPart );
2719 delete_view( view );
2720 }
2721
2722 server_leave_uninterrupted_section( &csVirtual, &sigset );
2723
2724 done:
2725 if (dup_mapping) NtClose( dup_mapping );
2726 if (needs_close) close( unix_handle );
2727 return res;
2728 }
2729
2730
2731 /***********************************************************************
2732 * NtUnmapViewOfSection (NTDLL.@)
2733 * ZwUnmapViewOfSection (NTDLL.@)
2734 */
2735 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
2736 {
2737 struct file_view *view;
2738 NTSTATUS status = STATUS_NOT_MAPPED_VIEW;
2739 sigset_t sigset;
2740 void *base = ROUND_ADDR( addr, page_mask );
2741
2742 if (process != NtCurrentProcess())
2743 {
2744 apc_call_t call;
2745 apc_result_t result;
2746
2747 memset( &call, 0, sizeof(call) );
2748
2749 call.unmap_view.type = APC_UNMAP_VIEW;
2750 call.unmap_view.addr = wine_server_client_ptr( addr );
2751 status = server_queue_process_apc( process, &call, &result );
2752 if (status == STATUS_SUCCESS) status = result.unmap_view.status;
2753 return status;
2754 }
2755
2756 server_enter_uninterrupted_section( &csVirtual, &sigset );
2757 if ((view = VIRTUAL_FindView( base, 0 )) && (base == view->base) && !(view->protect & VPROT_VALLOC))
2758 {
2759 delete_view( view );
2760 status = STATUS_SUCCESS;
2761 }
2762 server_leave_uninterrupted_section( &csVirtual, &sigset );
2763 return status;
2764 }
2765
2766
2767 /***********************************************************************
2768 * NtFlushVirtualMemory (NTDLL.@)
2769 * ZwFlushVirtualMemory (NTDLL.@)
2770 */
2771 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
2772 SIZE_T *size_ptr, ULONG unknown )
2773 {
2774 struct file_view *view;
2775 NTSTATUS status = STATUS_SUCCESS;
2776 sigset_t sigset;
2777 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
2778
2779 if (process != NtCurrentProcess())
2780 {
2781 apc_call_t call;
2782 apc_result_t result;
2783
2784 memset( &call, 0, sizeof(call) );
2785
2786 call.virtual_flush.type = APC_VIRTUAL_FLUSH;
2787 call.virtual_flush.addr = wine_server_client_ptr( addr );
2788 call.virtual_flush.size = *size_ptr;
2789 status = server_queue_process_apc( process, &call, &result );
2790 if (status != STATUS_SUCCESS) return status;
2791
2792 if (result.virtual_flush.status == STATUS_SUCCESS)
2793 {
2794 *addr_ptr = wine_server_get_ptr( result.virtual_flush.addr );
2795 *size_ptr = result.virtual_flush.size;
2796 }
2797 return result.virtual_flush.status;
2798 }
2799
2800 server_enter_uninterrupted_section( &csVirtual, &sigset );
2801 if (!(view = VIRTUAL_FindView( addr, *size_ptr ))) status = STATUS_INVALID_PARAMETER;
2802 else
2803 {
2804 if (!*size_ptr) *size_ptr = view->size;
2805 *addr_ptr = addr;
2806 #ifdef MS_ASYNC
2807 if (msync( addr, *size_ptr, MS_ASYNC )) status = STATUS_NOT_MAPPED_DATA;
2808 #endif
2809 }
2810 server_leave_uninterrupted_section( &csVirtual, &sigset );
2811 return status;
2812 }
2813
2814
2815 /***********************************************************************
2816 * NtGetWriteWatch (NTDLL.@)
2817 * ZwGetWriteWatch (NTDLL.@)
2818 */
2819 NTSTATUS WINAPI NtGetWriteWatch( HANDLE process, ULONG flags, PVOID base, SIZE_T size, PVOID *addresses,
2820 ULONG_PTR *count, ULONG *granularity )
2821 {
2822 struct file_view *view;
2823 NTSTATUS status = STATUS_SUCCESS;
2824 sigset_t sigset;
2825
2826 size = ROUND_SIZE( base, size );
2827 base = ROUND_ADDR( base, page_mask );
2828
2829 if (!count || !granularity) return STATUS_ACCESS_VIOLATION;
2830 if (!*count || !size) return STATUS_INVALID_PARAMETER;
2831 if (flags & ~WRITE_WATCH_FLAG_RESET) return STATUS_INVALID_PARAMETER;
2832
2833 if (!addresses) return STATUS_ACCESS_VIOLATION;
2834
2835 TRACE( "%p %x %p-%p %p %lu\n", process, flags, base, (char *)base + size,
2836 addresses, *count );
2837
2838 server_enter_uninterrupted_section( &csVirtual, &sigset );
2839
2840 if ((view = VIRTUAL_FindView( base, size )) && (view->protect & VPROT_WRITEWATCH))
2841 {
2842 ULONG_PTR pos = 0;
2843 char *addr = base;
2844 char *end = addr + size;
2845
2846 while (pos < *count && addr < end)
2847 {
2848 BYTE prot = view->prot[(addr - (char *)view->base) >> page_shift];
2849 if (!(prot & VPROT_WRITEWATCH)) addresses[pos++] = addr;
2850 addr += page_size;
2851 }
2852 if (flags & WRITE_WATCH_FLAG_RESET) reset_write_watches( view, base, addr - (char *)base );
2853 *count = pos;
2854 *granularity = page_size;
2855 }
2856 else status = STATUS_INVALID_PARAMETER;
2857
2858 server_leave_uninterrupted_section( &csVirtual, &sigset );
2859 return status;
2860 }
2861
2862
2863 /***********************************************************************
2864 * NtResetWriteWatch (NTDLL.@)
2865 * ZwResetWriteWatch (NTDLL.@)
2866 */
2867 NTSTATUS WINAPI NtResetWriteWatch( HANDLE process, PVOID base, SIZE_T size )
2868 {
2869 struct file_view *view;
2870 NTSTATUS status = STATUS_SUCCESS;
2871 sigset_t sigset;
2872
2873 size = ROUND_SIZE( base, size );
2874 base = ROUND_ADDR( base, page_mask );
2875
2876 TRACE( "%p %p-%p\n", process, base, (char *)base + size );
2877
2878 if (!size) return STATUS_INVALID_PARAMETER;
2879
2880 server_enter_uninterrupted_section( &csVirtual, &sigset );
2881
2882 if ((view = VIRTUAL_FindView( base, size )) && (view->protect & VPROT_WRITEWATCH))
2883 reset_write_watches( view, base, size );
2884 else
2885 status = STATUS_INVALID_PARAMETER;
2886
2887 server_leave_uninterrupted_section( &csVirtual, &sigset );
2888 return status;
2889 }
2890
2891
2892 /***********************************************************************
2893 * NtReadVirtualMemory (NTDLL.@)
2894 * ZwReadVirtualMemory (NTDLL.@)
2895 */
2896 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
2897 SIZE_T size, SIZE_T *bytes_read )
2898 {
2899 NTSTATUS status;
2900
2901 if (virtual_check_buffer_for_write( buffer, size ))
2902 {
2903 SERVER_START_REQ( read_process_memory )
2904 {
2905 req->handle = wine_server_obj_handle( process );
2906 req->addr = wine_server_client_ptr( addr );
2907 wine_server_set_reply( req, buffer, size );
2908 if ((status = wine_server_call( req ))) size = 0;
2909 }
2910 SERVER_END_REQ;
2911 }
2912 else
2913 {
2914 status = STATUS_ACCESS_VIOLATION;
2915 size = 0;
2916 }
2917 if (bytes_read) *bytes_read = size;
2918 return status;
2919 }
2920
2921
2922 /***********************************************************************
2923 * NtWriteVirtualMemory (NTDLL.@)
2924 * ZwWriteVirtualMemory (NTDLL.@)
2925 */
2926 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
2927 SIZE_T size, SIZE_T *bytes_written )
2928 {
2929 NTSTATUS status;
2930
2931 if (virtual_check_buffer_for_read( buffer, size ))
2932 {
2933 SERVER_START_REQ( write_process_memory )
2934 {
2935 req->handle = wine_server_obj_handle( process );
2936 req->addr = wine_server_client_ptr( addr );
2937 wine_server_add_data( req, buffer, size );
2938 if ((status = wine_server_call( req ))) size = 0;
2939 }
2940 SERVER_END_REQ;
2941 }
2942 else
2943 {
2944 status = STATUS_PARTIAL_COPY;
2945 size = 0;
2946 }
2947 if (bytes_written) *bytes_written = size;
2948 return status;
2949 }
2950
2951
2952 /***********************************************************************
2953 * NtAreMappedFilesTheSame (NTDLL.@)
2954 * ZwAreMappedFilesTheSame (NTDLL.@)
2955 */
2956 NTSTATUS WINAPI NtAreMappedFilesTheSame(PVOID addr1, PVOID addr2)
2957 {
2958 struct file_view *view1, *view2;
2959 struct stat st1, st2;
2960 NTSTATUS status;
2961 sigset_t sigset;
2962
2963 TRACE("%p %p\n", addr1, addr2);
2964
2965 server_enter_uninterrupted_section( &csVirtual, &sigset );
2966
2967 view1 = VIRTUAL_FindView( addr1, 0 );
2968 view2 = VIRTUAL_FindView( addr2, 0 );
2969
2970 if (!view1 || !view2)
2971 status = STATUS_INVALID_ADDRESS;
2972 else if ((view1->protect & VPROT_VALLOC) || (view2->protect & VPROT_VALLOC))
2973 status = STATUS_CONFLICTING_ADDRESSES;
2974 else if (view1 == view2)
2975 status = STATUS_SUCCESS;
2976 else if (!(view1->protect & VPROT_IMAGE) || !(view2->protect & VPROT_IMAGE))
2977 status = STATUS_NOT_SAME_DEVICE;
2978 else if (!stat_mapping_file( view1, &st1 ) && !stat_mapping_file( view2, &st2 ) &&
2979 st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino)
2980 status = STATUS_SUCCESS;
2981 else
2982 status = STATUS_NOT_SAME_DEVICE;
2983
2984 server_leave_uninterrupted_section( &csVirtual, &sigset );
2985 return status;
2986 }
Maarten's multimedia branch