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push 7f8c39dca3a5819e8ef115eebf7abed537de3a22
[wine/hacks.git] / dlls / ntdll / virtual.c
blobf14085dd216c3a19d65e7713710ffd47d3478131
1 /*
2 * Win32 virtual memory functions
3 *
4 * Copyright 1997, 2002 Alexandre Julliard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 #include "config.h"
22 #include "wine/port.h"
23
24 #include <assert.h>
25 #include <errno.h>
26 #ifdef HAVE_SYS_ERRNO_H
27 #include <sys/errno.h>
28 #endif
29 #include <fcntl.h>
30 #ifdef HAVE_UNISTD_H
31 # include <unistd.h>
32 #endif
33 #include <stdarg.h>
34 #include <stdlib.h>
35 #include <stdio.h>
36 #include <string.h>
37 #include <sys/types.h>
38 #ifdef HAVE_SYS_STAT_H
39 # include <sys/stat.h>
40 #endif
41 #ifdef HAVE_SYS_MMAN_H
42 # include <sys/mman.h>
43 #endif
44 #ifdef HAVE_VALGRIND_MEMCHECK_H
45 # include <valgrind/memcheck.h>
46 #endif
47
48 #define NONAMELESSUNION
49 #define NONAMELESSSTRUCT
50 #include "ntstatus.h"
51 #define WIN32_NO_STATUS
52 #include "windef.h"
53 #include "winternl.h"
54 #include "wine/library.h"
55 #include "wine/server.h"
56 #include "wine/list.h"
57 #include "wine/debug.h"
58 #include "ntdll_misc.h"
59
60 WINE_DEFAULT_DEBUG_CHANNEL(virtual);
61 WINE_DECLARE_DEBUG_CHANNEL(module);
62
63 #ifndef MS_SYNC
64 #define MS_SYNC 0
65 #endif
66
67 #ifndef MAP_NORESERVE
68 #define MAP_NORESERVE 0
69 #endif
70
71 /* File view */
72 typedef struct file_view
73 {
74 struct list entry; /* Entry in global view list */
75 void *base; /* Base address */
76 size_t size; /* Size in bytes */
77 HANDLE mapping; /* Handle to the file mapping */
78 BYTE flags; /* Allocation flags (VFLAG_*) */
79 BYTE protect; /* Protection for all pages at allocation time */
80 BYTE prot[1]; /* Protection byte for each page */
81 } FILE_VIEW;
82
83 /* Per-view flags */
84 #define VFLAG_SYSTEM 0x01 /* system view (underlying mmap not under our control) */
85 #define VFLAG_VALLOC 0x02 /* allocated by VirtualAlloc */
86
87 /* Conversion from VPROT_* to Win32 flags */
88 static const BYTE VIRTUAL_Win32Flags[16] =
89 {
90 PAGE_NOACCESS, /* 0 */
91 PAGE_READONLY, /* READ */
92 PAGE_READWRITE, /* WRITE */
93 PAGE_READWRITE, /* READ | WRITE */
94 PAGE_EXECUTE, /* EXEC */
95 PAGE_EXECUTE_READ, /* READ | EXEC */
96 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
97 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
98 PAGE_WRITECOPY, /* WRITECOPY */
99 PAGE_WRITECOPY, /* READ | WRITECOPY */
100 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
101 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
102 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
103 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
104 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
105 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
106 };
107
108 static struct list views_list = LIST_INIT(views_list);
109
110 static RTL_CRITICAL_SECTION csVirtual;
111 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
112 {
113 0, 0, &csVirtual,
114 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
115 0, 0, { (DWORD_PTR)(__FILE__ ": csVirtual") }
116 };
117 static RTL_CRITICAL_SECTION csVirtual = { &critsect_debug, -1, 0, 0, 0, 0 };
118
119 #ifdef __i386__
120 /* These are always the same on an i386, and it will be faster this way */
121 # define page_mask 0xfff
122 # define page_shift 12
123 # define page_size 0x1000
124 /* Note: these are Windows limits, you cannot change them. */
125 # define ADDRESS_SPACE_LIMIT ((void *)0xc0000000) /* top of the total available address space */
126 # define USER_SPACE_LIMIT ((void *)0x7fff0000) /* top of the user address space */
127 #else
128 static UINT page_shift;
129 static UINT page_size;
130 static UINT_PTR page_mask;
131 # define ADDRESS_SPACE_LIMIT 0 /* no limit needed on other platforms */
132 # define USER_SPACE_LIMIT 0 /* no limit needed on other platforms */
133 #endif /* __i386__ */
134
135 #define ROUND_ADDR(addr,mask) \
136 ((void *)((UINT_PTR)(addr) & ~(UINT_PTR)(mask)))
137
138 #define ROUND_SIZE(addr,size) \
139 (((UINT)(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 static void *user_space_limit = USER_SPACE_LIMIT;
145 static void *preload_reserve_start;
146 static void *preload_reserve_end;
147 static int use_locks;
148 static int force_exec_prot; /* whether to force PROT_EXEC on all PROT_READ mmaps */
149
150
151 /***********************************************************************
152 * VIRTUAL_GetProtStr
153 */
154 static const char *VIRTUAL_GetProtStr( BYTE prot )
155 {
156 static char buffer[6];
157 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
158 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
159 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
160 buffer[3] = (prot & VPROT_WRITECOPY) ? 'W' : ((prot & VPROT_WRITE) ? 'w' : '-');
161 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
162 buffer[5] = 0;
163 return buffer;
164 }
165
166
167 /***********************************************************************
168 * VIRTUAL_GetUnixProt
169 *
170 * Convert page protections to protection for mmap/mprotect.
171 */
172 static int VIRTUAL_GetUnixProt( BYTE vprot )
173 {
174 int prot = 0;
175 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
176 {
177 if (vprot & VPROT_READ) prot |= PROT_READ;
178 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
179 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
180 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
181 }
182 if (!prot) prot = PROT_NONE;
183 return prot;
184 }
185
186
187 /***********************************************************************
188 * VIRTUAL_DumpView
189 */
190 static void VIRTUAL_DumpView( FILE_VIEW *view )
191 {
192 UINT i, count;
193 char *addr = view->base;
194 BYTE prot = view->prot[0];
195
196 TRACE( "View: %p - %p", addr, addr + view->size - 1 );
197 if (view->flags & VFLAG_SYSTEM)
198 TRACE( " (system)\n" );
199 else if (view->flags & VFLAG_VALLOC)
200 TRACE( " (valloc)\n" );
201 else if (view->mapping)
202 TRACE( " %p\n", view->mapping );
203 else
204 TRACE( " (anonymous)\n");
205
206 for (count = i = 1; i < view->size >> page_shift; i++, count++)
207 {
208 if (view->prot[i] == prot) continue;
209 TRACE( " %p - %p %s\n",
210 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
211 addr += (count << page_shift);
212 prot = view->prot[i];
213 count = 0;
214 }
215 if (count)
216 TRACE( " %p - %p %s\n",
217 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
218 }
219
220
221 /***********************************************************************
222 * VIRTUAL_Dump
223 */
224 #if WINE_VM_DEBUG
225 static void VIRTUAL_Dump(void)
226 {
227 sigset_t sigset;
228 struct file_view *view;
229
230 TRACE( "Dump of all virtual memory views:\n" );
231 server_enter_uninterrupted_section( &csVirtual, &sigset );
232 LIST_FOR_EACH_ENTRY( view, &views_list, FILE_VIEW, entry )
233 {
234 VIRTUAL_DumpView( view );
235 }
236 server_leave_uninterrupted_section( &csVirtual, &sigset );
237 }
238 #endif
239
240
241 /***********************************************************************
242 * VIRTUAL_FindView
243 *
244 * Find the view containing a given address. The csVirtual section must be held by caller.
245 *
246 * PARAMS
247 * addr [I] Address
248 *
249 * RETURNS
250 * View: Success
251 * NULL: Failure
252 */
253 static struct file_view *VIRTUAL_FindView( const void *addr )
254 {
255 struct file_view *view;
256
257 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
258 {
259 if (view->base > addr) break;
260 if ((const char*)view->base + view->size > (const char*)addr) return view;
261 }
262 return NULL;
263 }
264
265
266 /***********************************************************************
267 * get_mask
268 */
269 static inline UINT_PTR get_mask( ULONG zero_bits )
270 {
271 if (!zero_bits) return 0xffff; /* allocations are aligned to 64K by default */
272 if (zero_bits < page_shift) zero_bits = page_shift;
273 return (1 << zero_bits) - 1;
274 }
275
276
277 /***********************************************************************
278 * find_view_range
279 *
280 * Find the first view overlapping at least part of the specified range.
281 * The csVirtual section must be held by caller.
282 */
283 static struct file_view *find_view_range( const void *addr, size_t size )
284 {
285 struct file_view *view;
286
287 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
288 {
289 if ((const char *)view->base >= (const char *)addr + size) break;
290 if ((const char *)view->base + view->size > (const char *)addr) return view;
291 }
292 return NULL;
293 }
294
295
296 /***********************************************************************
297 * find_free_area
298 *
299 * Find a free area between views inside the specified range.
300 * The csVirtual section must be held by caller.
301 */
302 static void *find_free_area( void *base, void *end, size_t size, size_t mask, int top_down )
303 {
304 struct list *ptr;
305 void *start;
306
307 if (top_down)
308 {
309 start = ROUND_ADDR( (char *)end - size, mask );
310 if (start >= end || start < base) return NULL;
311
312 for (ptr = views_list.prev; ptr != &views_list; ptr = ptr->prev)
313 {
314 struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
315
316 if ((char *)view->base + view->size <= (char *)start) break;
317 if ((char *)view->base >= (char *)start + size) continue;
318 start = ROUND_ADDR( (char *)view->base - size, mask );
319 /* stop if remaining space is not large enough */
320 if (!start || start >= end || start < base) return NULL;
321 }
322 }
323 else
324 {
325 start = ROUND_ADDR( (char *)base + mask, mask );
326 if (start >= end || (char *)end - (char *)start < size) return NULL;
327
328 for (ptr = views_list.next; ptr != &views_list; ptr = ptr->next)
329 {
330 struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
331
332 if ((char *)view->base >= (char *)start + size) break;
333 if ((char *)view->base + view->size <= (char *)start) continue;
334 start = ROUND_ADDR( (char *)view->base + view->size + mask, mask );
335 /* stop if remaining space is not large enough */
336 if (!start || start >= end || (char *)end - (char *)start < size) return NULL;
337 }
338 }
339 return start;
340 }
341
342
343 /***********************************************************************
344 * add_reserved_area
345 *
346 * Add a reserved area to the list maintained by libwine.
347 * The csVirtual section must be held by caller.
348 */
349 static void add_reserved_area( void *addr, size_t size )
350 {
351 TRACE( "adding %p-%p\n", addr, (char *)addr + size );
352
353 if (addr < user_space_limit)
354 {
355 /* unmap the part of the area that is below the limit */
356 assert( (char *)addr + size > (char *)user_space_limit );
357 munmap( addr, (char *)user_space_limit - (char *)addr );
358 size -= (char *)user_space_limit - (char *)addr;
359 addr = user_space_limit;
360 }
361 /* blow away existing mappings */
362 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
363 wine_mmap_add_reserved_area( addr, size );
364 }
365
366
367 /***********************************************************************
368 * is_beyond_limit
369 *
370 * Check if an address range goes beyond a given limit.
371 */
372 static inline int is_beyond_limit( const void *addr, size_t size, const void *limit )
373 {
374 return (limit && (addr >= limit || (const char *)addr + size > (const char *)limit));
375 }
376
377
378 /***********************************************************************
379 * unmap_area
380 *
381 * Unmap an area, or simply replace it by an empty mapping if it is
382 * in a reserved area. The csVirtual section must be held by caller.
383 */
384 static inline void unmap_area( void *addr, size_t size )
385 {
386 if (wine_mmap_is_in_reserved_area( addr, size ))
387 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
388 else if (is_beyond_limit( addr, size, user_space_limit ))
389 add_reserved_area( addr, size );
390 else
391 munmap( addr, size );
392 }
393
394
395 /***********************************************************************
396 * delete_view
397 *
398 * Deletes a view. The csVirtual section must be held by caller.
399 */
400 static void delete_view( struct file_view *view ) /* [in] View */
401 {
402 if (!(view->flags & VFLAG_SYSTEM)) unmap_area( view->base, view->size );
403 list_remove( &view->entry );
404 if (view->mapping) NtClose( view->mapping );
405 free( view );
406 }
407
408
409 /***********************************************************************
410 * create_view
411 *
412 * Create a view. The csVirtual section must be held by caller.
413 */
414 static NTSTATUS create_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
415 {
416 struct file_view *view;
417 struct list *ptr;
418 int unix_prot = VIRTUAL_GetUnixProt( vprot );
419
420 assert( !((UINT_PTR)base & page_mask) );
421 assert( !(size & page_mask) );
422
423 /* Create the view structure */
424
425 if (!(view = malloc( sizeof(*view) + (size >> page_shift) - 1 ))) return STATUS_NO_MEMORY;
426
427 view->base = base;
428 view->size = size;
429 view->flags = 0;
430 view->mapping = 0;
431 view->protect = vprot;
432 memset( view->prot, vprot & ~VPROT_IMAGE, size >> page_shift );
433
434 /* Insert it in the linked list */
435
436 LIST_FOR_EACH( ptr, &views_list )
437 {
438 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
439 if (next->base > base) break;
440 }
441 list_add_before( ptr, &view->entry );
442
443 /* Check for overlapping views. This can happen if the previous view
444 * was a system view that got unmapped behind our back. In that case
445 * we recover by simply deleting it. */
446
447 if ((ptr = list_prev( &views_list, &view->entry )) != NULL)
448 {
449 struct file_view *prev = LIST_ENTRY( ptr, struct file_view, entry );
450 if ((char *)prev->base + prev->size > (char *)base)
451 {
452 TRACE( "overlapping prev view %p-%p for %p-%p\n",
453 prev->base, (char *)prev->base + prev->size,
454 base, (char *)base + view->size );
455 assert( prev->flags & VFLAG_SYSTEM );
456 delete_view( prev );
457 }
458 }
459 if ((ptr = list_next( &views_list, &view->entry )) != NULL)
460 {
461 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
462 if ((char *)base + view->size > (char *)next->base)
463 {
464 TRACE( "overlapping next view %p-%p for %p-%p\n",
465 next->base, (char *)next->base + next->size,
466 base, (char *)base + view->size );
467 assert( next->flags & VFLAG_SYSTEM );
468 delete_view( next );
469 }
470 }
471
472 *view_ret = view;
473 VIRTUAL_DEBUG_DUMP_VIEW( view );
474
475 if (force_exec_prot && (unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
476 {
477 TRACE( "forcing exec permission on %p-%p\n", base, (char *)base + size - 1 );
478 mprotect( base, size, unix_prot | PROT_EXEC );
479 }
480 return STATUS_SUCCESS;
481 }
482
483
484 /***********************************************************************
485 * VIRTUAL_GetWin32Prot
486 *
487 * Convert page protections to Win32 flags.
488 */
489 static DWORD VIRTUAL_GetWin32Prot( BYTE vprot )
490 {
491 DWORD ret = VIRTUAL_Win32Flags[vprot & 0x0f];
492 if (vprot & VPROT_NOCACHE) ret |= PAGE_NOCACHE;
493 if (vprot & VPROT_GUARD) ret |= PAGE_GUARD;
494 return ret;
495 }
496
497
498 /***********************************************************************
499 * VIRTUAL_GetProt
500 *
501 * Build page protections from Win32 flags.
502 *
503 * PARAMS
504 * protect [I] Win32 protection flags
505 *
506 * RETURNS
507 * Value of page protection flags
508 */
509 static BYTE VIRTUAL_GetProt( DWORD protect )
510 {
511 BYTE vprot;
512
513 switch(protect & 0xff)
514 {
515 case PAGE_READONLY:
516 vprot = VPROT_READ;
517 break;
518 case PAGE_READWRITE:
519 vprot = VPROT_READ | VPROT_WRITE;
520 break;
521 case PAGE_WRITECOPY:
522 /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
523 * that the hFile must have been opened with GENERIC_READ and
524 * GENERIC_WRITE access. This is WRONG as tests show that you
525 * only need GENERIC_READ access (at least for Win9x,
526 * FIXME: what about NT?). Thus, we don't put VPROT_WRITE in
527 * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
528 */
529 vprot = VPROT_READ | VPROT_WRITECOPY;
530 break;
531 case PAGE_EXECUTE:
532 vprot = VPROT_EXEC;
533 break;
534 case PAGE_EXECUTE_READ:
535 vprot = VPROT_EXEC | VPROT_READ;
536 break;
537 case PAGE_EXECUTE_READWRITE:
538 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
539 break;
540 case PAGE_EXECUTE_WRITECOPY:
541 /* See comment for PAGE_WRITECOPY above */
542 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
543 break;
544 case PAGE_NOACCESS:
545 default:
546 vprot = 0;
547 break;
548 }
549 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
550 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
551 return vprot;
552 }
553
554
555 /***********************************************************************
556 * VIRTUAL_SetProt
557 *
558 * Change the protection of a range of pages.
559 *
560 * RETURNS
561 * TRUE: Success
562 * FALSE: Failure
563 */
564 static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
565 void *base, /* [in] Starting address */
566 size_t size, /* [in] Size in bytes */
567 BYTE vprot ) /* [in] Protections to use */
568 {
569 int unix_prot = VIRTUAL_GetUnixProt(vprot);
570
571 TRACE("%p-%p %s\n",
572 base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
573
574 /* if setting stack guard pages, store the permissions first, as the guard may be
575 * triggered at any point after mprotect and change the permissions again */
576 if ((vprot & VPROT_GUARD) &&
577 ((char *)base >= (char *)NtCurrentTeb()->DeallocationStack) &&
578 ((char *)base < (char *)NtCurrentTeb()->Tib.StackBase))
579 {
580 memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
581 vprot, size >> page_shift );
582 mprotect( base, size, unix_prot );
583 VIRTUAL_DEBUG_DUMP_VIEW( view );
584 return TRUE;
585 }
586
587 if (force_exec_prot && (unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
588 {
589 TRACE( "forcing exec permission on %p-%p\n", base, (char *)base + size - 1 );
590 if (!mprotect( base, size, unix_prot | PROT_EXEC )) goto done;
591 /* exec + write may legitimately fail, in that case fall back to write only */
592 if (!(unix_prot & PROT_WRITE)) return FALSE;
593 }
594
595 if (mprotect( base, size, unix_prot )) return FALSE; /* FIXME: last error */
596
597 done:
598 memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
599 vprot, size >> page_shift );
600 VIRTUAL_DEBUG_DUMP_VIEW( view );
601 return TRUE;
602 }
603
604
605 /***********************************************************************
606 * unmap_extra_space
607 *
608 * Release the extra memory while keeping the range starting on the granularity boundary.
609 */
610 static inline void *unmap_extra_space( void *ptr, size_t total_size, size_t wanted_size, size_t mask )
611 {
612 if ((ULONG_PTR)ptr & mask)
613 {
614 size_t extra = mask + 1 - ((ULONG_PTR)ptr & mask);
615 munmap( ptr, extra );
616 ptr = (char *)ptr + extra;
617 total_size -= extra;
618 }
619 if (total_size > wanted_size)
620 munmap( (char *)ptr + wanted_size, total_size - wanted_size );
621 return ptr;
622 }
623
624
625 struct alloc_area
626 {
627 size_t size;
628 size_t mask;
629 int top_down;
630 void *result;
631 };
632
633 /***********************************************************************
634 * alloc_reserved_area_callback
635 *
636 * Try to map some space inside a reserved area. Callback for wine_mmap_enum_reserved_areas.
637 */
638 static int alloc_reserved_area_callback( void *start, size_t size, void *arg )
639 {
640 static void * const address_space_start = (void *)0x110000;
641 struct alloc_area *alloc = arg;
642 void *end = (char *)start + size;
643
644 if (start < address_space_start) start = address_space_start;
645 if (user_space_limit && end > user_space_limit) end = user_space_limit;
646 if (start >= end) return 0;
647
648 /* make sure we don't touch the preloader reserved range */
649 if (preload_reserve_end >= start)
650 {
651 if (preload_reserve_end >= end)
652 {
653 if (preload_reserve_start <= start) return 0; /* no space in that area */
654 if (preload_reserve_start < end) end = preload_reserve_start;
655 }
656 else if (preload_reserve_start <= start) start = preload_reserve_end;
657 else
658 {
659 /* range is split in two by the preloader reservation, try first part */
660 if ((alloc->result = find_free_area( start, preload_reserve_start, alloc->size,
661 alloc->mask, alloc->top_down )))
662 return 1;
663 /* then fall through to try second part */
664 start = preload_reserve_end;
665 }
666 }
667 if ((alloc->result = find_free_area( start, end, alloc->size, alloc->mask, alloc->top_down )))
668 return 1;
669
670 return 0;
671 }
672
673
674 /***********************************************************************
675 * map_view
676 *
677 * Create a view and mmap the corresponding memory area.
678 * The csVirtual section must be held by caller.
679 */
680 static NTSTATUS map_view( struct file_view **view_ret, void *base, size_t size, size_t mask,
681 int top_down, BYTE vprot )
682 {
683 void *ptr;
684 NTSTATUS status;
685
686 if (base)
687 {
688 if (is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
689 return STATUS_WORKING_SET_LIMIT_RANGE;
690
691 switch (wine_mmap_is_in_reserved_area( base, size ))
692 {
693 case -1: /* partially in a reserved area */
694 return STATUS_CONFLICTING_ADDRESSES;
695
696 case 0: /* not in a reserved area, do a normal allocation */
697 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
698 {
699 if (errno == ENOMEM) return STATUS_NO_MEMORY;
700 return STATUS_INVALID_PARAMETER;
701 }
702 if (ptr != base)
703 {
704 /* We couldn't get the address we wanted */
705 if (is_beyond_limit( ptr, size, user_space_limit )) add_reserved_area( ptr, size );
706 else munmap( ptr, size );
707 return STATUS_CONFLICTING_ADDRESSES;
708 }
709 break;
710
711 default:
712 case 1: /* in a reserved area, make sure the address is available */
713 if (find_view_range( base, size )) return STATUS_CONFLICTING_ADDRESSES;
714 /* replace the reserved area by our mapping */
715 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED )) != base)
716 return STATUS_INVALID_PARAMETER;
717 break;
718 }
719 }
720 else
721 {
722 size_t view_size = size + mask + 1;
723 struct alloc_area alloc;
724
725 alloc.size = size;
726 alloc.mask = mask;
727 alloc.top_down = top_down;
728 if (wine_mmap_enum_reserved_areas( alloc_reserved_area_callback, &alloc, top_down ))
729 {
730 ptr = alloc.result;
731 TRACE( "got mem in reserved area %p-%p\n", ptr, (char *)ptr + size );
732 if (wine_anon_mmap( ptr, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED ) != ptr)
733 return STATUS_INVALID_PARAMETER;
734 goto done;
735 }
736
737 for (;;)
738 {
739 if ((ptr = wine_anon_mmap( NULL, view_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
740 {
741 if (errno == ENOMEM) return STATUS_NO_MEMORY;
742 return STATUS_INVALID_PARAMETER;
743 }
744 TRACE( "got mem with anon mmap %p-%p\n", ptr, (char *)ptr + size );
745 /* if we got something beyond the user limit, unmap it and retry */
746 if (is_beyond_limit( ptr, view_size, user_space_limit )) add_reserved_area( ptr, view_size );
747 else break;
748 }
749 ptr = unmap_extra_space( ptr, view_size, size, mask );
750 }
751 done:
752 status = create_view( view_ret, ptr, size, vprot );
753 if (status != STATUS_SUCCESS) unmap_area( ptr, size );
754 return status;
755 }
756
757
758 /***********************************************************************
759 * unaligned_mmap
760 *
761 * Linux kernels before 2.4.x can support non page-aligned offsets, as
762 * long as the offset is aligned to the filesystem block size. This is
763 * a big performance gain so we want to take advantage of it.
764 *
765 * However, when we use 64-bit file support this doesn't work because
766 * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
767 * in that it rounds unaligned offsets down to a page boundary. For
768 * these reasons we do a direct system call here.
769 */
770 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
771 unsigned int flags, int fd, off_t offset )
772 {
773 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
774 if (!(offset >> 32) && (offset & page_mask))
775 {
776 int ret;
777
778 struct
779 {
780 void *addr;
781 unsigned int length;
782 unsigned int prot;
783 unsigned int flags;
784 unsigned int fd;
785 unsigned int offset;
786 } args;
787
788 args.addr = addr;
789 args.length = length;
790 args.prot = prot;
791 args.flags = flags;
792 args.fd = fd;
793 args.offset = offset;
794
795 __asm__ __volatile__("push %%ebx\n\t"
796 "movl %2,%%ebx\n\t"
797 "int $0x80\n\t"
798 "popl %%ebx"
799 : "=a" (ret)
800 : "0" (90), /* SYS_mmap */
801 "q" (&args)
802 : "memory" );
803 if (ret < 0 && ret > -4096)
804 {
805 errno = -ret;
806 ret = -1;
807 }
808 return (void *)ret;
809 }
810 #endif
811 return mmap( addr, length, prot, flags, fd, offset );
812 }
813
814
815 /***********************************************************************
816 * map_file_into_view
817 *
818 * Wrapper for mmap() to map a file into a view, falling back to read if mmap fails.
819 * The csVirtual section must be held by caller.
820 */
821 static NTSTATUS map_file_into_view( struct file_view *view, int fd, size_t start, size_t size,
822 off_t offset, BYTE vprot, BOOL removable )
823 {
824 void *ptr;
825 int prot = VIRTUAL_GetUnixProt( vprot );
826 BOOL shared_write = (vprot & VPROT_WRITE) != 0;
827
828 assert( start < view->size );
829 assert( start + size <= view->size );
830
831 /* only try mmap if media is not removable (or if we require write access) */
832 if (!removable || shared_write)
833 {
834 int flags = MAP_FIXED | (shared_write ? MAP_SHARED : MAP_PRIVATE);
835
836 if (unaligned_mmap( (char *)view->base + start, size, prot, flags, fd, offset ) != (void *)-1)
837 goto done;
838
839 /* mmap() failed; if this is because the file offset is not */
840 /* page-aligned (EINVAL), or because the underlying filesystem */
841 /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
842 if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return FILE_GetNtStatus();
843 if (shared_write) /* we cannot fake shared write mappings */
844 {
845 if (errno == EINVAL) return STATUS_INVALID_PARAMETER;
846 ERR( "shared writable mmap not supported, broken filesystem?\n" );
847 return STATUS_NOT_SUPPORTED;
848 }
849 }
850
851 /* Reserve the memory with an anonymous mmap */
852 ptr = wine_anon_mmap( (char *)view->base + start, size, PROT_READ | PROT_WRITE, MAP_FIXED );
853 if (ptr == (void *)-1) return FILE_GetNtStatus();
854 /* Now read in the file */
855 pread( fd, ptr, size, offset );
856 if (prot != (PROT_READ|PROT_WRITE)) mprotect( ptr, size, prot ); /* Set the right protection */
857 done:
858 memset( view->prot + (start >> page_shift), vprot, ROUND_SIZE(start,size) >> page_shift );
859 return STATUS_SUCCESS;
860 }
861
862
863 /***********************************************************************
864 * decommit_view
865 *
866 * Decommit some pages of a given view.
867 * The csVirtual section must be held by caller.
868 */
869 static NTSTATUS decommit_pages( struct file_view *view, size_t start, size_t size )
870 {
871 if (wine_anon_mmap( (char *)view->base + start, size, PROT_NONE, MAP_FIXED ) != (void *)-1)
872 {
873 BYTE *p = view->prot + (start >> page_shift);
874 size >>= page_shift;
875 while (size--) *p++ &= ~VPROT_COMMITTED;
876 return STATUS_SUCCESS;
877 }
878 return FILE_GetNtStatus();
879 }
880
881
882 /***********************************************************************
883 * map_image
884 *
885 * Map an executable (PE format) image into memory.
886 */
887 static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, SIZE_T total_size, SIZE_T mask,
888 SIZE_T header_size, int shared_fd, HANDLE dup_mapping, PVOID *addr_ptr )
889 {
890 IMAGE_DOS_HEADER *dos;
891 IMAGE_NT_HEADERS *nt;
892 IMAGE_SECTION_HEADER *sec;
893 IMAGE_DATA_DIRECTORY *imports;
894 NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
895 int i;
896 off_t pos;
897 sigset_t sigset;
898 struct stat st;
899 struct file_view *view = NULL;
900 char *ptr, *header_end;
901
902 /* zero-map the whole range */
903
904 server_enter_uninterrupted_section( &csVirtual, &sigset );
905
906 if (base >= (char *)0x110000) /* make sure the DOS area remains free */
907 status = map_view( &view, base, total_size, mask, FALSE,
908 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
909
910 if (status == STATUS_CONFLICTING_ADDRESSES)
911 status = map_view( &view, NULL, total_size, mask, FALSE,
912 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
913
914 if (status != STATUS_SUCCESS) goto error;
915
916 ptr = view->base;
917 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
918
919 /* map the header */
920
921 if (fstat( fd, &st ) == -1)
922 {
923 status = FILE_GetNtStatus();
924 goto error;
925 }
926 status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
927 if (!st.st_size) goto error;
928 header_size = min( header_size, st.st_size );
929 if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
930 !dup_mapping ) != STATUS_SUCCESS) goto error;
931 dos = (IMAGE_DOS_HEADER *)ptr;
932 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
933 header_end = ptr + ROUND_SIZE( 0, header_size );
934 memset( ptr + header_size, 0, header_end - (ptr + header_size) );
935 if ((char *)(nt + 1) > header_end) goto error;
936 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
937 if ((char *)(sec + nt->FileHeader.NumberOfSections) > header_end) goto error;
938
939 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
940 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
941
942 /* check the architecture */
943
944 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
945 {
946 MESSAGE("Trying to load PE image for unsupported architecture (");
947 switch (nt->FileHeader.Machine)
948 {
949 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
950 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
951 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
952 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
953 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
954 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
955 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
956 case IMAGE_FILE_MACHINE_IA64: MESSAGE("IA-64"); break;
957 case IMAGE_FILE_MACHINE_ALPHA64: MESSAGE("Alpha-64"); break;
958 case IMAGE_FILE_MACHINE_AMD64: MESSAGE("AMD-64"); break;
959 case IMAGE_FILE_MACHINE_ARM: MESSAGE("ARM"); break;
960 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
961 }
962 MESSAGE(")\n");
963 goto error;
964 }
965
966 /* check for non page-aligned binary */
967
968 if (nt->OptionalHeader.SectionAlignment <= page_mask)
969 {
970 /* unaligned sections, this happens for native subsystem binaries */
971 /* in that case Windows simply maps in the whole file */
972
973 if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ,
974 !dup_mapping ) != STATUS_SUCCESS) goto error;
975
976 /* check that all sections are loaded at the right offset */
977 if (nt->OptionalHeader.FileAlignment != nt->OptionalHeader.SectionAlignment) goto error;
978 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
979 {
980 if (sec[i].VirtualAddress != sec[i].PointerToRawData)
981 goto error; /* Windows refuses to load in that case too */
982 }
983
984 /* set the image protections */
985 VIRTUAL_SetProt( view, ptr, total_size,
986 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
987
988 /* no relocations are performed on non page-aligned binaries */
989 goto done;
990 }
991
992
993 /* map all the sections */
994
995 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
996 {
997 static const SIZE_T sector_align = 0x1ff;
998 SIZE_T map_size, file_start, file_size, end;
999
1000 if (!sec->Misc.VirtualSize)
1001 map_size = ROUND_SIZE( 0, sec->SizeOfRawData );
1002 else
1003 map_size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
1004
1005 /* file positions are rounded to sector boundaries regardless of OptionalHeader.FileAlignment */
1006 file_start = sec->PointerToRawData & ~sector_align;
1007 file_size = (sec->SizeOfRawData + (sec->PointerToRawData & sector_align) + sector_align) & ~sector_align;
1008 if (file_size > map_size) file_size = map_size;
1009
1010 /* a few sanity checks */
1011 end = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, map_size );
1012 if (sec->VirtualAddress > total_size || end > total_size || end < sec->VirtualAddress)
1013 {
1014 WARN_(module)( "Section %.8s too large (%x+%lx/%lx)\n",
1015 sec->Name, sec->VirtualAddress, map_size, total_size );
1016 goto error;
1017 }
1018
1019 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
1020 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
1021 {
1022 TRACE_(module)( "mapping shared section %.8s at %p off %x (%x) size %lx (%lx) flags %x\n",
1023 sec->Name, ptr + sec->VirtualAddress,
1024 sec->PointerToRawData, (int)pos, file_size, map_size,
1025 sec->Characteristics );
1026 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, map_size, pos,
1027 VPROT_COMMITTED | VPROT_READ | VPROT_WRITE,
1028 FALSE ) != STATUS_SUCCESS)
1029 {
1030 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
1031 goto error;
1032 }
1033
1034 /* check if the import directory falls inside this section */
1035 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
1036 imports->VirtualAddress < sec->VirtualAddress + map_size)
1037 {
1038 UINT_PTR base = imports->VirtualAddress & ~page_mask;
1039 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
1040 if (end > sec->VirtualAddress + map_size) end = sec->VirtualAddress + map_size;
1041 if (end > base)
1042 map_file_into_view( view, shared_fd, base, end - base,
1043 pos + (base - sec->VirtualAddress),
1044 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1045 FALSE );
1046 }
1047 pos += map_size;
1048 continue;
1049 }
1050
1051 TRACE_(module)( "mapping section %.8s at %p off %x size %x virt %x flags %x\n",
1052 sec->Name, ptr + sec->VirtualAddress,
1053 sec->PointerToRawData, sec->SizeOfRawData,
1054 sec->Misc.VirtualSize, sec->Characteristics );
1055
1056 if (!sec->PointerToRawData || !file_size) continue;
1057
1058 /* Note: if the section is not aligned properly map_file_into_view will magically
1059 * fall back to read(), so we don't need to check anything here.
1060 */
1061 end = file_start + file_size;
1062 if (sec->PointerToRawData >= st.st_size ||
1063 end > ((st.st_size + sector_align) & ~sector_align) ||
1064 end < file_start ||
1065 map_file_into_view( view, fd, sec->VirtualAddress, file_size, file_start,
1066 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1067 !dup_mapping ) != STATUS_SUCCESS)
1068 {
1069 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
1070 goto error;
1071 }
1072
1073 if (file_size & page_mask)
1074 {
1075 end = ROUND_SIZE( 0, file_size );
1076 if (end > map_size) end = map_size;
1077 TRACE_(module)("clearing %p - %p\n",
1078 ptr + sec->VirtualAddress + file_size,
1079 ptr + sec->VirtualAddress + end );
1080 memset( ptr + sec->VirtualAddress + file_size, 0, end - file_size );
1081 }
1082 }
1083
1084
1085 /* perform base relocation, if necessary */
1086
1087 if (ptr != base &&
1088 ((nt->FileHeader.Characteristics & IMAGE_FILE_DLL) ||
1089 !NtCurrentTeb()->Peb->ImageBaseAddress) )
1090 {
1091 int delta = ptr - base;
1092 IMAGE_BASE_RELOCATION *rel, *end;
1093 const IMAGE_DATA_DIRECTORY *relocs;
1094
1095 if (nt->FileHeader.Characteristics & IMAGE_FILE_RELOCS_STRIPPED)
1096 {
1097 WARN_(module)( "Need to relocate module from %p to %p, but there are no relocation records\n",
1098 base, ptr );
1099 status = STATUS_CONFLICTING_ADDRESSES;
1100 goto error;
1101 }
1102
1103 TRACE_(module)( "relocating from %p-%p to %p-%p\n",
1104 base, base + total_size, ptr, ptr + total_size );
1105
1106 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1107 rel = (IMAGE_BASE_RELOCATION *)(ptr + relocs->VirtualAddress);
1108 end = (IMAGE_BASE_RELOCATION *)(ptr + relocs->VirtualAddress + relocs->Size);
1109
1110 while (rel < end && rel->SizeOfBlock)
1111 {
1112 rel = LdrProcessRelocationBlock( ptr + rel->VirtualAddress,
1113 (rel->SizeOfBlock - sizeof(*rel)) / sizeof(USHORT),
1114 (USHORT *)(rel + 1), delta );
1115 if (!rel) goto error;
1116 }
1117 }
1118
1119 /* set the image protections */
1120
1121 VIRTUAL_SetProt( view, ptr, ROUND_SIZE( 0, header_size ), VPROT_COMMITTED | VPROT_READ );
1122
1123 sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
1124 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1125 {
1126 SIZE_T size;
1127 BYTE vprot = VPROT_COMMITTED;
1128
1129 if (sec->Misc.VirtualSize)
1130 size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
1131 else
1132 size = ROUND_SIZE( sec->VirtualAddress, sec->SizeOfRawData );
1133
1134 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
1135 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_READ|VPROT_WRITECOPY;
1136 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
1137
1138 /* Dumb game crack lets the AOEP point into a data section. Adjust. */
1139 if ((nt->OptionalHeader.AddressOfEntryPoint >= sec->VirtualAddress) &&
1140 (nt->OptionalHeader.AddressOfEntryPoint < sec->VirtualAddress + size))
1141 vprot |= VPROT_EXEC;
1142
1143 VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
1144 }
1145
1146 done:
1147 view->mapping = dup_mapping;
1148 server_leave_uninterrupted_section( &csVirtual, &sigset );
1149
1150 *addr_ptr = ptr;
1151 return STATUS_SUCCESS;
1152
1153 error:
1154 if (view) delete_view( view );
1155 server_leave_uninterrupted_section( &csVirtual, &sigset );
1156 if (dup_mapping) NtClose( dup_mapping );
1157 return status;
1158 }
1159
1160
1161 /***********************************************************************
1162 * virtual_init
1163 */
1164 void virtual_init(void)
1165 {
1166 const char *preload;
1167 #ifndef page_mask
1168 page_size = getpagesize();
1169 page_mask = page_size - 1;
1170 /* Make sure we have a power of 2 */
1171 assert( !(page_size & page_mask) );
1172 page_shift = 0;
1173 while ((1 << page_shift) != page_size) page_shift++;
1174 #endif /* page_mask */
1175 if ((preload = getenv("WINEPRELOADRESERVE")))
1176 {
1177 unsigned long start, end;
1178 if (sscanf( preload, "%lx-%lx", &start, &end ) == 2)
1179 {
1180 preload_reserve_start = (void *)start;
1181 preload_reserve_end = (void *)end;
1182 }
1183 }
1184 }
1185
1186
1187 /***********************************************************************
1188 * virtual_init_threading
1189 */
1190 void virtual_init_threading(void)
1191 {
1192 use_locks = 1;
1193 }
1194
1195
1196 /***********************************************************************
1197 * virtual_alloc_thread_stack
1198 */
1199 NTSTATUS virtual_alloc_thread_stack( void *base, SIZE_T size )
1200 {
1201 FILE_VIEW *view;
1202 NTSTATUS status;
1203 sigset_t sigset;
1204
1205 server_enter_uninterrupted_section( &csVirtual, &sigset );
1206
1207 if (base) /* already allocated, create a system view */
1208 {
1209 size = ROUND_SIZE( base, size );
1210 base = ROUND_ADDR( base, page_mask );
1211 if ((status = create_view( &view, base, size,
1212 VPROT_READ | VPROT_WRITE | VPROT_COMMITTED )) != STATUS_SUCCESS)
1213 goto done;
1214 view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
1215 }
1216 else
1217 {
1218 size = (size + 0xffff) & ~0xffff; /* round to 64K boundary */
1219 if ((status = map_view( &view, NULL, size, 0xffff, 0,
1220 VPROT_READ | VPROT_WRITE | VPROT_COMMITTED )) != STATUS_SUCCESS)
1221 goto done;
1222 view->flags |= VFLAG_VALLOC;
1223 #ifdef VALGRIND_STACK_REGISTER
1224 /* no need to de-register the stack as it's the one of the main thread */
1225 VALGRIND_STACK_REGISTER( view->base, (char *)view->base + view->size );
1226 #endif
1227 }
1228
1229 /* setup no access guard page */
1230 VIRTUAL_SetProt( view, view->base, page_size, VPROT_COMMITTED );
1231 VIRTUAL_SetProt( view, (char *)view->base + page_size, page_size,
1232 VPROT_READ | VPROT_WRITE | VPROT_COMMITTED | VPROT_GUARD );
1233
1234 /* note: limit is lower than base since the stack grows down */
1235 NtCurrentTeb()->DeallocationStack = view->base;
1236 NtCurrentTeb()->Tib.StackBase = (char *)view->base + view->size;
1237 NtCurrentTeb()->Tib.StackLimit = (char *)view->base + 2 * page_size;
1238
1239 done:
1240 server_leave_uninterrupted_section( &csVirtual, &sigset );
1241 return status;
1242 }
1243
1244
1245 /***********************************************************************
1246 * virtual_clear_thread_stack
1247 *
1248 * Clear the stack contents before calling the main entry point, some broken apps need that.
1249 */
1250 void virtual_clear_thread_stack(void)
1251 {
1252 void *stack = NtCurrentTeb()->Tib.StackLimit;
1253 size_t size = (char *)NtCurrentTeb()->Tib.StackBase - (char *)NtCurrentTeb()->Tib.StackLimit;
1254
1255 wine_anon_mmap( stack, size, PROT_READ | PROT_WRITE, MAP_FIXED );
1256 if (force_exec_prot) mprotect( stack, size, PROT_READ | PROT_WRITE | PROT_EXEC );
1257 }
1258
1259
1260 /***********************************************************************
1261 * VIRTUAL_HandleFault
1262 */
1263 NTSTATUS VIRTUAL_HandleFault( LPCVOID addr )
1264 {
1265 FILE_VIEW *view;
1266 NTSTATUS ret = STATUS_ACCESS_VIOLATION;
1267 sigset_t sigset;
1268
1269 server_enter_uninterrupted_section( &csVirtual, &sigset );
1270 if ((view = VIRTUAL_FindView( addr )))
1271 {
1272 void *page = ROUND_ADDR( addr, page_mask );
1273 BYTE vprot = view->prot[((const char *)page - (const char *)view->base) >> page_shift];
1274 if (vprot & VPROT_GUARD)
1275 {
1276 VIRTUAL_SetProt( view, page, page_size, vprot & ~VPROT_GUARD );
1277 ret = STATUS_GUARD_PAGE_VIOLATION;
1278 }
1279 }
1280 server_leave_uninterrupted_section( &csVirtual, &sigset );
1281 return ret;
1282 }
1283
1284
1285
1286 /***********************************************************************
1287 * virtual_handle_stack_fault
1288 *
1289 * Handle an access fault inside the current thread stack.
1290 * Called from inside a signal handler.
1291 */
1292 BOOL virtual_handle_stack_fault( void *addr )
1293 {
1294 FILE_VIEW *view;
1295 BOOL ret = FALSE;
1296
1297 RtlEnterCriticalSection( &csVirtual ); /* no need for signal masking inside signal handler */
1298 if ((view = VIRTUAL_FindView( addr )))
1299 {
1300 void *page = ROUND_ADDR( addr, page_mask );
1301 BYTE vprot = view->prot[((const char *)page - (const char *)view->base) >> page_shift];
1302 if (vprot & VPROT_GUARD)
1303 {
1304 VIRTUAL_SetProt( view, page, page_size, vprot & ~VPROT_GUARD );
1305 if ((char *)page + page_size == NtCurrentTeb()->Tib.StackLimit)
1306 NtCurrentTeb()->Tib.StackLimit = page;
1307 ret = TRUE;
1308 }
1309 }
1310 RtlLeaveCriticalSection( &csVirtual );
1311 return ret;
1312 }
1313
1314
1315 /***********************************************************************
1316 * VIRTUAL_SetForceExec
1317 *
1318 * Whether to force exec prot on all views.
1319 */
1320 void VIRTUAL_SetForceExec( BOOL enable )
1321 {
1322 struct file_view *view;
1323 sigset_t sigset;
1324
1325 server_enter_uninterrupted_section( &csVirtual, &sigset );
1326 if (!force_exec_prot != !enable) /* change all existing views */
1327 {
1328 force_exec_prot = enable;
1329
1330 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
1331 {
1332 UINT i, count;
1333 int unix_prot;
1334 char *addr = view->base;
1335 BYTE prot = view->prot[0];
1336
1337 for (count = i = 1; i < view->size >> page_shift; i++, count++)
1338 {
1339 if (view->prot[i] == prot) continue;
1340 unix_prot = VIRTUAL_GetUnixProt( prot );
1341 if ((unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
1342 {
1343 TRACE( "%s exec prot for %p-%p\n",
1344 force_exec_prot ? "enabling" : "disabling",
1345 addr, addr + (count << page_shift) - 1 );
1346 mprotect( addr, count << page_shift,
1347 unix_prot | (force_exec_prot ? PROT_EXEC : 0) );
1348 }
1349 addr += (count << page_shift);
1350 prot = view->prot[i];
1351 count = 0;
1352 }
1353 if (count)
1354 {
1355 unix_prot = VIRTUAL_GetUnixProt( prot );
1356 if ((unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
1357 {
1358 TRACE( "%s exec prot for %p-%p\n",
1359 force_exec_prot ? "enabling" : "disabling",
1360 addr, addr + (count << page_shift) - 1 );
1361 mprotect( addr, count << page_shift,
1362 unix_prot | (force_exec_prot ? PROT_EXEC : 0) );
1363 }
1364 }
1365 }
1366 }
1367 server_leave_uninterrupted_section( &csVirtual, &sigset );
1368 }
1369
1370
1371 /***********************************************************************
1372 * VIRTUAL_UseLargeAddressSpace
1373 *
1374 * Increase the address space size for apps that support it.
1375 */
1376 void VIRTUAL_UseLargeAddressSpace(void)
1377 {
1378 /* no large address space on win9x */
1379 if (NtCurrentTeb()->Peb->OSPlatformId != VER_PLATFORM_WIN32_NT) return;
1380 user_space_limit = ADDRESS_SPACE_LIMIT;
1381 }
1382
1383
1384 /***********************************************************************
1385 * NtAllocateVirtualMemory (NTDLL.@)
1386 * ZwAllocateVirtualMemory (NTDLL.@)
1387 */
1388 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
1389 SIZE_T *size_ptr, ULONG type, ULONG protect )
1390 {
1391 void *base;
1392 BYTE vprot;
1393 SIZE_T size = *size_ptr;
1394 SIZE_T mask = get_mask( zero_bits );
1395 NTSTATUS status = STATUS_SUCCESS;
1396 struct file_view *view;
1397 sigset_t sigset;
1398
1399 TRACE("%p %p %08lx %x %08x\n", process, *ret, size, type, protect );
1400
1401 if (!size) return STATUS_INVALID_PARAMETER;
1402
1403 if (process != NtCurrentProcess())
1404 {
1405 apc_call_t call;
1406 apc_result_t result;
1407
1408 memset( &call, 0, sizeof(call) );
1409
1410 call.virtual_alloc.type = APC_VIRTUAL_ALLOC;
1411 call.virtual_alloc.addr = *ret;
1412 call.virtual_alloc.size = *size_ptr;
1413 call.virtual_alloc.zero_bits = zero_bits;
1414 call.virtual_alloc.op_type = type;
1415 call.virtual_alloc.prot = protect;
1416 status = NTDLL_queue_process_apc( process, &call, &result );
1417 if (status != STATUS_SUCCESS) return status;
1418
1419 if (result.virtual_alloc.status == STATUS_SUCCESS)
1420 {
1421 *ret = result.virtual_alloc.addr;
1422 *size_ptr = result.virtual_alloc.size;
1423 }
1424 return result.virtual_alloc.status;
1425 }
1426
1427 /* Round parameters to a page boundary */
1428
1429 if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
1430
1431 if (*ret)
1432 {
1433 if (type & MEM_RESERVE) /* Round down to 64k boundary */
1434 base = ROUND_ADDR( *ret, mask );
1435 else
1436 base = ROUND_ADDR( *ret, page_mask );
1437 size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1438
1439 /* disallow low 64k, wrap-around and kernel space */
1440 if (((char *)base < (char *)0x10000) ||
1441 ((char *)base + size < (char *)base) ||
1442 is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
1443 return STATUS_INVALID_PARAMETER;
1444 }
1445 else
1446 {
1447 base = NULL;
1448 size = (size + page_mask) & ~page_mask;
1449 }
1450
1451 /* Compute the alloc type flags */
1452
1453 if (!(type & MEM_SYSTEM))
1454 {
1455 if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
1456 (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_TOP_DOWN | MEM_WRITE_WATCH | MEM_RESET)))
1457 {
1458 WARN("called with wrong alloc type flags (%08x) !\n", type);
1459 return STATUS_INVALID_PARAMETER;
1460 }
1461 if (type & MEM_WRITE_WATCH)
1462 {
1463 FIXME("MEM_WRITE_WATCH type not supported\n");
1464 return STATUS_NOT_SUPPORTED;
1465 }
1466 }
1467 vprot = VIRTUAL_GetProt( protect );
1468 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
1469
1470 /* Reserve the memory */
1471
1472 if (use_locks) server_enter_uninterrupted_section( &csVirtual, &sigset );
1473
1474 if (type & MEM_SYSTEM)
1475 {
1476 if (type & MEM_IMAGE) vprot |= VPROT_IMAGE;
1477 status = create_view( &view, base, size, vprot | VPROT_COMMITTED );
1478 if (status == STATUS_SUCCESS)
1479 {
1480 view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
1481 base = view->base;
1482 }
1483 }
1484 else if ((type & MEM_RESERVE) || !base)
1485 {
1486 status = map_view( &view, base, size, mask, type & MEM_TOP_DOWN, vprot );
1487 if (status == STATUS_SUCCESS)
1488 {
1489 view->flags |= VFLAG_VALLOC;
1490 base = view->base;
1491 }
1492 }
1493 else /* commit the pages */
1494 {
1495 if (!(view = VIRTUAL_FindView( base )) ||
1496 ((char *)base + size > (char *)view->base + view->size)) status = STATUS_NOT_MAPPED_VIEW;
1497 else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1498 }
1499
1500 if (use_locks) server_leave_uninterrupted_section( &csVirtual, &sigset );
1501
1502 if (status == STATUS_SUCCESS)
1503 {
1504 *ret = base;
1505 *size_ptr = size;
1506 }
1507 return status;
1508 }
1509
1510
1511 /***********************************************************************
1512 * NtFreeVirtualMemory (NTDLL.@)
1513 * ZwFreeVirtualMemory (NTDLL.@)
1514 */
1515 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr, ULONG type )
1516 {
1517 FILE_VIEW *view;
1518 char *base;
1519 sigset_t sigset;
1520 NTSTATUS status = STATUS_SUCCESS;
1521 LPVOID addr = *addr_ptr;
1522 SIZE_T size = *size_ptr;
1523
1524 TRACE("%p %p %08lx %x\n", process, addr, size, type );
1525
1526 if (process != NtCurrentProcess())
1527 {
1528 apc_call_t call;
1529 apc_result_t result;
1530
1531 memset( &call, 0, sizeof(call) );
1532
1533 call.virtual_free.type = APC_VIRTUAL_FREE;
1534 call.virtual_free.addr = addr;
1535 call.virtual_free.size = size;
1536 call.virtual_free.op_type = type;
1537 status = NTDLL_queue_process_apc( process, &call, &result );
1538 if (status != STATUS_SUCCESS) return status;
1539
1540 if (result.virtual_free.status == STATUS_SUCCESS)
1541 {
1542 *addr_ptr = result.virtual_free.addr;
1543 *size_ptr = result.virtual_free.size;
1544 }
1545 return result.virtual_free.status;
1546 }
1547
1548 /* Fix the parameters */
1549
1550 size = ROUND_SIZE( addr, size );
1551 base = ROUND_ADDR( addr, page_mask );
1552
1553 /* avoid freeing the DOS area when a broken app passes a NULL pointer */
1554 if (!base && !(type & MEM_SYSTEM)) return STATUS_INVALID_PARAMETER;
1555
1556 server_enter_uninterrupted_section( &csVirtual, &sigset );
1557
1558 if (!(view = VIRTUAL_FindView( base )) ||
1559 (base + size > (char *)view->base + view->size) ||
1560 !(view->flags & VFLAG_VALLOC))
1561 {
1562 status = STATUS_INVALID_PARAMETER;
1563 }
1564 else if (type & MEM_SYSTEM)
1565 {
1566 /* return the values that the caller should use to unmap the area */
1567 *addr_ptr = view->base;
1568 if (!wine_mmap_is_in_reserved_area( view->base, view->size )) *size_ptr = view->size;
1569 else *size_ptr = 0; /* make sure we don't munmap anything from a reserved area */
1570 view->flags |= VFLAG_SYSTEM;
1571 delete_view( view );
1572 }
1573 else if (type == MEM_RELEASE)
1574 {
1575 /* Free the pages */
1576
1577 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
1578 else
1579 {
1580 delete_view( view );
1581 *addr_ptr = base;
1582 *size_ptr = size;
1583 }
1584 }
1585 else if (type == MEM_DECOMMIT)
1586 {
1587 status = decommit_pages( view, base - (char *)view->base, size );
1588 if (status == STATUS_SUCCESS)
1589 {
1590 *addr_ptr = base;
1591 *size_ptr = size;
1592 }
1593 }
1594 else
1595 {
1596 WARN("called with wrong free type flags (%08x) !\n", type);
1597 status = STATUS_INVALID_PARAMETER;
1598 }
1599
1600 server_leave_uninterrupted_section( &csVirtual, &sigset );
1601 return status;
1602 }
1603
1604
1605 /***********************************************************************
1606 * NtProtectVirtualMemory (NTDLL.@)
1607 * ZwProtectVirtualMemory (NTDLL.@)
1608 */
1609 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr,
1610 ULONG new_prot, ULONG *old_prot )
1611 {
1612 FILE_VIEW *view;
1613 sigset_t sigset;
1614 NTSTATUS status = STATUS_SUCCESS;
1615 char *base;
1616 UINT i;
1617 BYTE vprot, *p;
1618 ULONG prot;
1619 SIZE_T size = *size_ptr;
1620 LPVOID addr = *addr_ptr;
1621
1622 TRACE("%p %p %08lx %08x\n", process, addr, size, new_prot );
1623
1624 if (process != NtCurrentProcess())
1625 {
1626 apc_call_t call;
1627 apc_result_t result;
1628
1629 memset( &call, 0, sizeof(call) );
1630
1631 call.virtual_protect.type = APC_VIRTUAL_PROTECT;
1632 call.virtual_protect.addr = addr;
1633 call.virtual_protect.size = size;
1634 call.virtual_protect.prot = new_prot;
1635 status = NTDLL_queue_process_apc( process, &call, &result );
1636 if (status != STATUS_SUCCESS) return status;
1637
1638 if (result.virtual_protect.status == STATUS_SUCCESS)
1639 {
1640 *addr_ptr = result.virtual_protect.addr;
1641 *size_ptr = result.virtual_protect.size;
1642 if (old_prot) *old_prot = result.virtual_protect.prot;
1643 }
1644 return result.virtual_protect.status;
1645 }
1646
1647 /* Fix the parameters */
1648
1649 size = ROUND_SIZE( addr, size );
1650 base = ROUND_ADDR( addr, page_mask );
1651
1652 server_enter_uninterrupted_section( &csVirtual, &sigset );
1653
1654 if (!(view = VIRTUAL_FindView( base )) || (base + size > (char *)view->base + view->size))
1655 {
1656 status = STATUS_INVALID_PARAMETER;
1657 }
1658 else
1659 {
1660 /* Make sure all the pages are committed */
1661
1662 p = view->prot + ((base - (char *)view->base) >> page_shift);
1663 prot = VIRTUAL_GetWin32Prot( *p );
1664 for (i = size >> page_shift; i; i--, p++)
1665 {
1666 if (!(*p & VPROT_COMMITTED))
1667 {
1668 status = STATUS_NOT_COMMITTED;
1669 break;
1670 }
1671 }
1672 if (!i)
1673 {
1674 if (old_prot) *old_prot = prot;
1675 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1676 if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1677 }
1678 }
1679 server_leave_uninterrupted_section( &csVirtual, &sigset );
1680
1681 if (status == STATUS_SUCCESS)
1682 {
1683 *addr_ptr = base;
1684 *size_ptr = size;
1685 }
1686 return status;
1687 }
1688
1689 #define UNIMPLEMENTED_INFO_CLASS(c) \
1690 case c: \
1691 FIXME("(process=%p,addr=%p) Unimplemented information class: " #c "\n", process, addr); \
1692 return STATUS_INVALID_INFO_CLASS
1693
1694 /***********************************************************************
1695 * NtQueryVirtualMemory (NTDLL.@)
1696 * ZwQueryVirtualMemory (NTDLL.@)
1697 */
1698 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
1699 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
1700 SIZE_T len, SIZE_T *res_len )
1701 {
1702 FILE_VIEW *view;
1703 char *base, *alloc_base = 0;
1704 struct list *ptr;
1705 SIZE_T size = 0;
1706 MEMORY_BASIC_INFORMATION *info = buffer;
1707 sigset_t sigset;
1708
1709 if (info_class != MemoryBasicInformation)
1710 {
1711 switch(info_class)
1712 {
1713 UNIMPLEMENTED_INFO_CLASS(MemoryWorkingSetList);
1714 UNIMPLEMENTED_INFO_CLASS(MemorySectionName);
1715 UNIMPLEMENTED_INFO_CLASS(MemoryBasicVlmInformation);
1716
1717 default:
1718 FIXME("(%p,%p,info_class=%d,%p,%ld,%p) Unknown information class\n",
1719 process, addr, info_class, buffer, len, res_len);
1720 return STATUS_INVALID_INFO_CLASS;
1721 }
1722 }
1723 if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
1724 return STATUS_WORKING_SET_LIMIT_RANGE;
1725
1726 if (process != NtCurrentProcess())
1727 {
1728 NTSTATUS status;
1729 apc_call_t call;
1730 apc_result_t result;
1731
1732 memset( &call, 0, sizeof(call) );
1733
1734 call.virtual_query.type = APC_VIRTUAL_QUERY;
1735 call.virtual_query.addr = addr;
1736 status = NTDLL_queue_process_apc( process, &call, &result );
1737 if (status != STATUS_SUCCESS) return status;
1738
1739 if (result.virtual_query.status == STATUS_SUCCESS)
1740 {
1741 info->BaseAddress = result.virtual_query.base;
1742 info->AllocationBase = result.virtual_query.alloc_base;
1743 info->RegionSize = result.virtual_query.size;
1744 info->State = result.virtual_query.state;
1745 info->Protect = result.virtual_query.prot;
1746 info->AllocationProtect = result.virtual_query.alloc_prot;
1747 info->Type = result.virtual_query.alloc_type;
1748 if (res_len) *res_len = sizeof(*info);
1749 }
1750 return result.virtual_query.status;
1751 }
1752
1753 base = ROUND_ADDR( addr, page_mask );
1754
1755 /* Find the view containing the address */
1756
1757 server_enter_uninterrupted_section( &csVirtual, &sigset );
1758 ptr = list_head( &views_list );
1759 for (;;)
1760 {
1761 if (!ptr)
1762 {
1763 /* make the address space end at the user limit, except if
1764 * the last view was mapped beyond that */
1765 if (alloc_base <= (char *)user_space_limit)
1766 {
1767 if (user_space_limit && base >= (char *)user_space_limit)
1768 {
1769 server_leave_uninterrupted_section( &csVirtual, &sigset );
1770 return STATUS_WORKING_SET_LIMIT_RANGE;
1771 }
1772 size = (char *)user_space_limit - alloc_base;
1773 }
1774 else size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1775 view = NULL;
1776 break;
1777 }
1778 view = LIST_ENTRY( ptr, struct file_view, entry );
1779 if ((char *)view->base > base)
1780 {
1781 size = (char *)view->base - alloc_base;
1782 view = NULL;
1783 break;
1784 }
1785 if ((char *)view->base + view->size > base)
1786 {
1787 alloc_base = view->base;
1788 size = view->size;
1789 break;
1790 }
1791 alloc_base = (char *)view->base + view->size;
1792 ptr = list_next( &views_list, ptr );
1793 }
1794
1795 /* Fill the info structure */
1796
1797 if (!view)
1798 {
1799 info->State = MEM_FREE;
1800 info->Protect = PAGE_NOACCESS;
1801 info->AllocationBase = 0;
1802 info->AllocationProtect = 0;
1803 info->Type = 0;
1804 }
1805 else
1806 {
1807 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1808 info->State = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
1809 info->Protect = VIRTUAL_GetWin32Prot( vprot );
1810 info->AllocationBase = alloc_base;
1811 info->AllocationProtect = VIRTUAL_GetWin32Prot( view->protect );
1812 if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
1813 else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
1814 else info->Type = MEM_MAPPED;
1815 for (size = base - alloc_base; size < view->size; size += page_size)
1816 if (view->prot[size >> page_shift] != vprot) break;
1817 }
1818 server_leave_uninterrupted_section( &csVirtual, &sigset );
1819
1820 info->BaseAddress = base;
1821 info->RegionSize = size - (base - alloc_base);
1822 if (res_len) *res_len = sizeof(*info);
1823 return STATUS_SUCCESS;
1824 }
1825
1826
1827 /***********************************************************************
1828 * NtLockVirtualMemory (NTDLL.@)
1829 * ZwLockVirtualMemory (NTDLL.@)
1830 */
1831 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1832 {
1833 NTSTATUS status = STATUS_SUCCESS;
1834
1835 if (process != NtCurrentProcess())
1836 {
1837 apc_call_t call;
1838 apc_result_t result;
1839
1840 memset( &call, 0, sizeof(call) );
1841
1842 call.virtual_lock.type = APC_VIRTUAL_LOCK;
1843 call.virtual_lock.addr = *addr;
1844 call.virtual_lock.size = *size;
1845 status = NTDLL_queue_process_apc( process, &call, &result );
1846 if (status != STATUS_SUCCESS) return status;
1847
1848 if (result.virtual_lock.status == STATUS_SUCCESS)
1849 {
1850 *addr = result.virtual_lock.addr;
1851 *size = result.virtual_lock.size;
1852 }
1853 return result.virtual_lock.status;
1854 }
1855
1856 *size = ROUND_SIZE( *addr, *size );
1857 *addr = ROUND_ADDR( *addr, page_mask );
1858
1859 if (mlock( *addr, *size )) status = STATUS_ACCESS_DENIED;
1860 return status;
1861 }
1862
1863
1864 /***********************************************************************
1865 * NtUnlockVirtualMemory (NTDLL.@)
1866 * ZwUnlockVirtualMemory (NTDLL.@)
1867 */
1868 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1869 {
1870 NTSTATUS status = STATUS_SUCCESS;
1871
1872 if (process != NtCurrentProcess())
1873 {
1874 apc_call_t call;
1875 apc_result_t result;
1876
1877 memset( &call, 0, sizeof(call) );
1878
1879 call.virtual_unlock.type = APC_VIRTUAL_UNLOCK;
1880 call.virtual_unlock.addr = *addr;
1881 call.virtual_unlock.size = *size;
1882 status = NTDLL_queue_process_apc( process, &call, &result );
1883 if (status != STATUS_SUCCESS) return status;
1884
1885 if (result.virtual_unlock.status == STATUS_SUCCESS)
1886 {
1887 *addr = result.virtual_unlock.addr;
1888 *size = result.virtual_unlock.size;
1889 }
1890 return result.virtual_unlock.status;
1891 }
1892
1893 *size = ROUND_SIZE( *addr, *size );
1894 *addr = ROUND_ADDR( *addr, page_mask );
1895
1896 if (munlock( *addr, *size )) status = STATUS_ACCESS_DENIED;
1897 return status;
1898 }
1899
1900
1901 /***********************************************************************
1902 * NtCreateSection (NTDLL.@)
1903 * ZwCreateSection (NTDLL.@)
1904 */
1905 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
1906 const LARGE_INTEGER *size, ULONG protect,
1907 ULONG sec_flags, HANDLE file )
1908 {
1909 NTSTATUS ret;
1910 BYTE vprot;
1911 DWORD len = (attr && attr->ObjectName) ? attr->ObjectName->Length : 0;
1912 struct security_descriptor *sd = NULL;
1913 struct object_attributes objattr;
1914
1915 /* Check parameters */
1916
1917 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1918
1919 objattr.rootdir = attr ? attr->RootDirectory : 0;
1920 objattr.sd_len = 0;
1921 objattr.name_len = len;
1922 if (attr)
1923 {
1924 ret = NTDLL_create_struct_sd( attr->SecurityDescriptor, &sd, &objattr.sd_len );
1925 if (ret != STATUS_SUCCESS) return ret;
1926 }
1927
1928 vprot = VIRTUAL_GetProt( protect );
1929 if (sec_flags & SEC_RESERVE)
1930 {
1931 if (file) return STATUS_INVALID_PARAMETER;
1932 }
1933 else vprot |= VPROT_COMMITTED;
1934 if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1935 if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
1936
1937 /* Create the server object */
1938
1939 SERVER_START_REQ( create_mapping )
1940 {
1941 req->access = access;
1942 req->attributes = (attr) ? attr->Attributes : 0;
1943 req->file_handle = file;
1944 req->size = size ? size->QuadPart : 0;
1945 req->protect = vprot;
1946 wine_server_add_data( req, &objattr, sizeof(objattr) );
1947 if (objattr.sd_len) wine_server_add_data( req, sd, objattr.sd_len );
1948 if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
1949 ret = wine_server_call( req );
1950 *handle = reply->handle;
1951 }
1952 SERVER_END_REQ;
1953
1954 NTDLL_free_struct_sd( sd );
1955
1956 return ret;
1957 }
1958
1959
1960 /***********************************************************************
1961 * NtOpenSection (NTDLL.@)
1962 * ZwOpenSection (NTDLL.@)
1963 */
1964 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
1965 {
1966 NTSTATUS ret;
1967 DWORD len = attr->ObjectName->Length;
1968
1969 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1970
1971 SERVER_START_REQ( open_mapping )
1972 {
1973 req->access = access;
1974 req->attributes = attr->Attributes;
1975 req->rootdir = attr->RootDirectory;
1976 wine_server_add_data( req, attr->ObjectName->Buffer, len );
1977 if (!(ret = wine_server_call( req ))) *handle = reply->handle;
1978 }
1979 SERVER_END_REQ;
1980 return ret;
1981 }
1982
1983
1984 /***********************************************************************
1985 * NtMapViewOfSection (NTDLL.@)
1986 * ZwMapViewOfSection (NTDLL.@)
1987 */
1988 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
1989 SIZE_T commit_size, const LARGE_INTEGER *offset_ptr, SIZE_T *size_ptr,
1990 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
1991 {
1992 NTSTATUS res;
1993 ULONGLONG full_size;
1994 SIZE_T size = 0;
1995 SIZE_T mask = get_mask( zero_bits );
1996 int unix_handle = -1, needs_close;
1997 int prot;
1998 void *base;
1999 struct file_view *view;
2000 DWORD header_size;
2001 HANDLE dup_mapping, shared_file;
2002 LARGE_INTEGER offset;
2003 sigset_t sigset;
2004
2005 offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
2006
2007 TRACE("handle=%p process=%p addr=%p off=%x%08x size=%lx access=%x\n",
2008 handle, process, *addr_ptr, offset.u.HighPart, offset.u.LowPart, size, protect );
2009
2010 /* Check parameters */
2011
2012 if ((offset.u.LowPart & mask) || (*addr_ptr && ((UINT_PTR)*addr_ptr & mask)))
2013 return STATUS_INVALID_PARAMETER;
2014
2015 if (process != NtCurrentProcess())
2016 {
2017 apc_call_t call;
2018 apc_result_t result;
2019
2020 memset( &call, 0, sizeof(call) );
2021
2022 call.map_view.type = APC_MAP_VIEW;
2023 call.map_view.handle = handle;
2024 call.map_view.addr = *addr_ptr;
2025 call.map_view.size = *size_ptr;
2026 call.map_view.offset = offset.QuadPart;
2027 call.map_view.zero_bits = zero_bits;
2028 call.map_view.alloc_type = alloc_type;
2029 call.map_view.prot = protect;
2030 res = NTDLL_queue_process_apc( process, &call, &result );
2031 if (res != STATUS_SUCCESS) return res;
2032
2033 if (result.map_view.status == STATUS_SUCCESS)
2034 {
2035 *addr_ptr = result.map_view.addr;
2036 *size_ptr = result.map_view.size;
2037 }
2038 return result.map_view.status;
2039 }
2040
2041 SERVER_START_REQ( get_mapping_info )
2042 {
2043 req->handle = handle;
2044 res = wine_server_call( req );
2045 prot = reply->protect;
2046 base = reply->base;
2047 full_size = reply->size;
2048 header_size = reply->header_size;
2049 dup_mapping = reply->mapping;
2050 shared_file = reply->shared_file;
2051 }
2052 SERVER_END_REQ;
2053 if (res) return res;
2054
2055 size = full_size;
2056 if (sizeof(size) < sizeof(full_size) && (size != full_size))
2057 ERR( "Sizes larger than 4Gb (%x%08x) not supported on this platform\n",
2058 (DWORD)(full_size >> 32), (DWORD)full_size );
2059
2060 if ((res = server_get_unix_fd( handle, 0, &unix_handle, &needs_close, NULL, NULL ))) goto done;
2061
2062 if (prot & VPROT_IMAGE)
2063 {
2064 if (shared_file)
2065 {
2066 int shared_fd, shared_needs_close;
2067
2068 if ((res = server_get_unix_fd( shared_file, FILE_READ_DATA|FILE_WRITE_DATA,
2069 &shared_fd, &shared_needs_close, NULL, NULL ))) goto done;
2070 res = map_image( handle, unix_handle, base, size, mask, header_size,
2071 shared_fd, dup_mapping, addr_ptr );
2072 if (shared_needs_close) close( shared_fd );
2073 NtClose( shared_file );
2074 }
2075 else
2076 {
2077 res = map_image( handle, unix_handle, base, size, mask, header_size,
2078 -1, dup_mapping, addr_ptr );
2079 }
2080 if (needs_close) close( unix_handle );
2081 if (!res) *size_ptr = size;
2082 return res;
2083 }
2084
2085 if ((offset.QuadPart >= size) || (*size_ptr > size - offset.QuadPart))
2086 {
2087 res = STATUS_INVALID_PARAMETER;
2088 goto done;
2089 }
2090 if (*size_ptr) size = ROUND_SIZE( offset.u.LowPart, *size_ptr );
2091 else size = size - offset.QuadPart;
2092
2093 switch(protect)
2094 {
2095 case PAGE_NOACCESS:
2096 break;
2097 case PAGE_READWRITE:
2098 case PAGE_EXECUTE_READWRITE:
2099 if (!(prot & VPROT_WRITE))
2100 {
2101 res = STATUS_INVALID_PARAMETER;
2102 goto done;
2103 }
2104 /* fall through */
2105 case PAGE_READONLY:
2106 case PAGE_WRITECOPY:
2107 case PAGE_EXECUTE:
2108 case PAGE_EXECUTE_READ:
2109 case PAGE_EXECUTE_WRITECOPY:
2110 if (prot & VPROT_READ) break;
2111 /* fall through */
2112 default:
2113 res = STATUS_INVALID_PARAMETER;
2114 goto done;
2115 }
2116
2117 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
2118 * which has a view of this mapping commits some pages, they will
2119 * appear committed in all other processes, which have the same
2120 * view created. Since we don't support this yet, we create the
2121 * whole mapping committed.
2122 */
2123 prot |= VPROT_COMMITTED;
2124
2125 /* Reserve a properly aligned area */
2126
2127 server_enter_uninterrupted_section( &csVirtual, &sigset );
2128
2129 res = map_view( &view, *addr_ptr, size, mask, FALSE, prot );
2130 if (res)
2131 {
2132 server_leave_uninterrupted_section( &csVirtual, &sigset );
2133 goto done;
2134 }
2135
2136 /* Map the file */
2137
2138 TRACE("handle=%p size=%lx offset=%x%08x\n",
2139 handle, size, offset.u.HighPart, offset.u.LowPart );
2140
2141 res = map_file_into_view( view, unix_handle, 0, size, offset.QuadPart, prot, !dup_mapping );
2142 if (res == STATUS_SUCCESS)
2143 {
2144 *addr_ptr = view->base;
2145 *size_ptr = size;
2146 view->mapping = dup_mapping;
2147 dup_mapping = 0; /* don't close it */
2148 }
2149 else
2150 {
2151 ERR( "map_file_into_view %p %lx %x%08x failed\n",
2152 view->base, size, offset.u.HighPart, offset.u.LowPart );
2153 delete_view( view );
2154 }
2155
2156 server_leave_uninterrupted_section( &csVirtual, &sigset );
2157
2158 done:
2159 if (dup_mapping) NtClose( dup_mapping );
2160 if (needs_close) close( unix_handle );
2161 return res;
2162 }
2163
2164
2165 /***********************************************************************
2166 * NtUnmapViewOfSection (NTDLL.@)
2167 * ZwUnmapViewOfSection (NTDLL.@)
2168 */
2169 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
2170 {
2171 FILE_VIEW *view;
2172 NTSTATUS status = STATUS_INVALID_PARAMETER;
2173 sigset_t sigset;
2174 void *base = ROUND_ADDR( addr, page_mask );
2175
2176 if (process != NtCurrentProcess())
2177 {
2178 apc_call_t call;
2179 apc_result_t result;
2180
2181 memset( &call, 0, sizeof(call) );
2182
2183 call.unmap_view.type = APC_UNMAP_VIEW;
2184 call.unmap_view.addr = addr;
2185 status = NTDLL_queue_process_apc( process, &call, &result );
2186 if (status == STATUS_SUCCESS) status = result.unmap_view.status;
2187 return status;
2188 }
2189
2190 server_enter_uninterrupted_section( &csVirtual, &sigset );
2191 if ((view = VIRTUAL_FindView( base )) && (base == view->base))
2192 {
2193 delete_view( view );
2194 status = STATUS_SUCCESS;
2195 }
2196 server_leave_uninterrupted_section( &csVirtual, &sigset );
2197 return status;
2198 }
2199
2200
2201 /***********************************************************************
2202 * NtFlushVirtualMemory (NTDLL.@)
2203 * ZwFlushVirtualMemory (NTDLL.@)
2204 */
2205 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
2206 SIZE_T *size_ptr, ULONG unknown )
2207 {
2208 FILE_VIEW *view;
2209 NTSTATUS status = STATUS_SUCCESS;
2210 sigset_t sigset;
2211 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
2212
2213 if (process != NtCurrentProcess())
2214 {
2215 apc_call_t call;
2216 apc_result_t result;
2217
2218 memset( &call, 0, sizeof(call) );
2219
2220 call.virtual_flush.type = APC_VIRTUAL_FLUSH;
2221 call.virtual_flush.addr = addr;
2222 call.virtual_flush.size = *size_ptr;
2223 status = NTDLL_queue_process_apc( process, &call, &result );
2224 if (status != STATUS_SUCCESS) return status;
2225
2226 if (result.virtual_flush.status == STATUS_SUCCESS)
2227 {
2228 *addr_ptr = result.virtual_flush.addr;
2229 *size_ptr = result.virtual_flush.size;
2230 }
2231 return result.virtual_flush.status;
2232 }
2233
2234 server_enter_uninterrupted_section( &csVirtual, &sigset );
2235 if (!(view = VIRTUAL_FindView( addr ))) status = STATUS_INVALID_PARAMETER;
2236 else
2237 {
2238 if (!*size_ptr) *size_ptr = view->size;
2239 *addr_ptr = addr;
2240 if (msync( addr, *size_ptr, MS_SYNC )) status = STATUS_NOT_MAPPED_DATA;
2241 }
2242 server_leave_uninterrupted_section( &csVirtual, &sigset );
2243 return status;
2244 }
2245
2246
2247 /***********************************************************************
2248 * NtReadVirtualMemory (NTDLL.@)
2249 * ZwReadVirtualMemory (NTDLL.@)
2250 */
2251 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
2252 SIZE_T size, SIZE_T *bytes_read )
2253 {
2254 NTSTATUS status;
2255
2256 SERVER_START_REQ( read_process_memory )
2257 {
2258 req->handle = process;
2259 req->addr = (void *)addr;
2260 wine_server_set_reply( req, buffer, size );
2261 if ((status = wine_server_call( req ))) size = 0;
2262 }
2263 SERVER_END_REQ;
2264 if (bytes_read) *bytes_read = size;
2265 return status;
2266 }
2267
2268
2269 /***********************************************************************
2270 * NtWriteVirtualMemory (NTDLL.@)
2271 * ZwWriteVirtualMemory (NTDLL.@)
2272 */
2273 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
2274 SIZE_T size, SIZE_T *bytes_written )
2275 {
2276 NTSTATUS status;
2277
2278 SERVER_START_REQ( write_process_memory )
2279 {
2280 req->handle = process;
2281 req->addr = addr;
2282 wine_server_add_data( req, buffer, size );
2283 if ((status = wine_server_call( req ))) size = 0;
2284 }
2285 SERVER_END_REQ;
2286 if (bytes_written) *bytes_written = size;
2287 return status;
2288 }
2289
2290
2291 /***********************************************************************
2292 * NtAreMappedFilesTheSame (NTDLL.@)
2293 * ZwAreMappedFilesTheSame (NTDLL.@)
2294 */
2295 NTSTATUS WINAPI NtAreMappedFilesTheSame(PVOID addr1, PVOID addr2)
2296 {
2297 TRACE("%p %p\n", addr1, addr2);
2298
2299 return STATUS_NOT_SAME_DEVICE;
2300 }
useful hacks and other patches not (yet) suitable for mainline