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ntdll: Also check for EACCES to detect noexec failures.
[wine.git] / dlls / ntdll / virtual.c
blobab270779b1c6092788a684686387be884b3469c6
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_SOCKET_H
36 # include <sys/socket.h>
37 #endif
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_SYS_SYSINFO_H
45 # include <sys/sysinfo.h>
46 #endif
47 #ifdef HAVE_VALGRIND_VALGRIND_H
48 # include <valgrind/valgrind.h>
49 #endif
50
51 #include "ntstatus.h"
52 #define WIN32_NO_STATUS
53 #define NONAMELESSUNION
54 #include "windef.h"
55 #include "winternl.h"
56 #include "wine/library.h"
57 #include "wine/server.h"
58 #include "wine/exception.h"
59 #include "wine/rbtree.h"
60 #include "wine/debug.h"
61 #include "ntdll_misc.h"
62
63 WINE_DEFAULT_DEBUG_CHANNEL(virtual);
64 WINE_DECLARE_DEBUG_CHANNEL(module);
65
66 #ifndef MAP_NORESERVE
67 #define MAP_NORESERVE 0
68 #endif
69
70 /* File view */
71 struct file_view
72 {
73 struct wine_rb_entry entry; /* entry in global view tree */
74 void *base; /* base address */
75 size_t size; /* size in bytes */
76 unsigned int protect; /* protection for all pages at allocation time and SEC_* flags */
77 };
78
79 /* per-page protection flags */
80 #define VPROT_READ 0x01
81 #define VPROT_WRITE 0x02
82 #define VPROT_EXEC 0x04
83 #define VPROT_WRITECOPY 0x08
84 #define VPROT_GUARD 0x10
85 #define VPROT_COMMITTED 0x20
86 #define VPROT_WRITEWATCH 0x40
87 /* per-mapping protection flags */
88 #define VPROT_SYSTEM 0x0200 /* system view (underlying mmap not under our control) */
89
90 /* Conversion from VPROT_* to Win32 flags */
91 static const BYTE VIRTUAL_Win32Flags[16] =
92 {
93 PAGE_NOACCESS, /* 0 */
94 PAGE_READONLY, /* READ */
95 PAGE_READWRITE, /* WRITE */
96 PAGE_READWRITE, /* READ | WRITE */
97 PAGE_EXECUTE, /* EXEC */
98 PAGE_EXECUTE_READ, /* READ | EXEC */
99 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
100 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
101 PAGE_WRITECOPY, /* WRITECOPY */
102 PAGE_WRITECOPY, /* READ | WRITECOPY */
103 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
104 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
105 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
106 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
107 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
108 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
109 };
110
111 static struct wine_rb_tree views_tree;
112
113 static RTL_CRITICAL_SECTION csVirtual;
114 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
115 {
116 0, 0, &csVirtual,
117 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
118 0, 0, { (DWORD_PTR)(__FILE__ ": csVirtual") }
119 };
120 static RTL_CRITICAL_SECTION csVirtual = { &critsect_debug, -1, 0, 0, 0, 0 };
121
122 #ifdef __i386__
123 static const UINT page_shift = 12;
124 static const UINT_PTR page_mask = 0xfff;
125 /* Note: these are Windows limits, you cannot change them. */
126 static void *address_space_limit = (void *)0xc0000000; /* top of the total available address space */
127 static void *user_space_limit = (void *)0x7fff0000; /* top of the user address space */
128 static void *working_set_limit = (void *)0x7fff0000; /* top of the current working set */
129 static void *address_space_start = (void *)0x110000; /* keep DOS area clear */
130 #elif defined(__x86_64__)
131 static const UINT page_shift = 12;
132 static const UINT_PTR page_mask = 0xfff;
133 static void *address_space_limit = (void *)0x7fffffff0000;
134 static void *user_space_limit = (void *)0x7fffffff0000;
135 static void *working_set_limit = (void *)0x7fffffff0000;
136 static void *address_space_start = (void *)0x10000;
137 #else
138 UINT_PTR page_size = 0;
139 static UINT page_shift;
140 static UINT_PTR page_mask;
141 static void *address_space_limit;
142 static void *user_space_limit;
143 static void *working_set_limit;
144 static void *address_space_start = (void *)0x10000;
145 #endif /* __i386__ */
146 static const BOOL is_win64 = (sizeof(void *) > sizeof(int));
147
148 #define ROUND_ADDR(addr,mask) \
149 ((void *)((UINT_PTR)(addr) & ~(UINT_PTR)(mask)))
150
151 #define ROUND_SIZE(addr,size) \
152 (((SIZE_T)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
153
154 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
155 do { if (TRACE_ON(virtual)) VIRTUAL_DumpView(view); } while (0)
156
157 #ifdef _WIN64 /* on 64-bit the page protection bytes use a 2-level table */
158 static const size_t pages_vprot_shift = 20;
159 static const size_t pages_vprot_mask = (1 << 20) - 1;
160 static size_t pages_vprot_size;
161 static BYTE **pages_vprot;
162 #else /* on 32-bit we use a simple array with one byte per page */
163 static BYTE *pages_vprot;
164 #endif
165
166 static struct file_view *view_block_start, *view_block_end, *next_free_view;
167 static const size_t view_block_size = 0x100000;
168 static void *preload_reserve_start;
169 static void *preload_reserve_end;
170 static BOOL use_locks;
171 static BOOL force_exec_prot; /* whether to force PROT_EXEC on all PROT_READ mmaps */
172
173 static inline int is_view_valloc( const struct file_view *view )
174 {
175 return !(view->protect & (SEC_FILE | SEC_RESERVE | SEC_COMMIT));
176 }
177
178 /***********************************************************************
179 * get_page_vprot
180 *
181 * Return the page protection byte.
182 */
183 static BYTE get_page_vprot( const void *addr )
184 {
185 size_t idx = (size_t)addr >> page_shift;
186
187 #ifdef _WIN64
188 if ((idx >> pages_vprot_shift) >= pages_vprot_size) return 0;
189 if (!pages_vprot[idx >> pages_vprot_shift]) return 0;
190 return pages_vprot[idx >> pages_vprot_shift][idx & pages_vprot_mask];
191 #else
192 return pages_vprot[idx];
193 #endif
194 }
195
196
197 /***********************************************************************
198 * set_page_vprot
199 *
200 * Set a range of page protection bytes.
201 */
202 static void set_page_vprot( const void *addr, size_t size, BYTE vprot )
203 {
204 size_t idx = (size_t)addr >> page_shift;
205 size_t end = ((size_t)addr + size + page_mask) >> page_shift;
206
207 #ifdef _WIN64
208 while (idx >> pages_vprot_shift != end >> pages_vprot_shift)
209 {
210 size_t dir_size = pages_vprot_mask + 1 - (idx & pages_vprot_mask);
211 memset( pages_vprot[idx >> pages_vprot_shift] + (idx & pages_vprot_mask), vprot, dir_size );
212 idx += dir_size;
213 }
214 memset( pages_vprot[idx >> pages_vprot_shift] + (idx & pages_vprot_mask), vprot, end - idx );
215 #else
216 memset( pages_vprot + idx, vprot, end - idx );
217 #endif
218 }
219
220
221 /***********************************************************************
222 * set_page_vprot_bits
223 *
224 * Set or clear bits in a range of page protection bytes.
225 */
226 static void set_page_vprot_bits( const void *addr, size_t size, BYTE set, BYTE clear )
227 {
228 size_t idx = (size_t)addr >> page_shift;
229 size_t end = ((size_t)addr + size + page_mask) >> page_shift;
230
231 #ifdef _WIN64
232 for ( ; idx < end; idx++)
233 {
234 BYTE *ptr = pages_vprot[idx >> pages_vprot_shift] + (idx & pages_vprot_mask);
235 *ptr = (*ptr & ~clear) | set;
236 }
237 #else
238 for ( ; idx < end; idx++) pages_vprot[idx] = (pages_vprot[idx] & ~clear) | set;
239 #endif
240 }
241
242
243 /***********************************************************************
244 * alloc_pages_vprot
245 *
246 * Allocate the page protection bytes for a given range.
247 */
248 static BOOL alloc_pages_vprot( const void *addr, size_t size )
249 {
250 #ifdef _WIN64
251 size_t idx = (size_t)addr >> page_shift;
252 size_t end = ((size_t)addr + size + page_mask) >> page_shift;
253 size_t i;
254 void *ptr;
255
256 assert( end <= pages_vprot_size << pages_vprot_shift );
257 for (i = idx >> pages_vprot_shift; i < (end + pages_vprot_mask) >> pages_vprot_shift; i++)
258 {
259 if (pages_vprot[i]) continue;
260 if ((ptr = wine_anon_mmap( NULL, pages_vprot_mask + 1, PROT_READ | PROT_WRITE, 0 )) == (void *)-1)
261 return FALSE;
262 pages_vprot[i] = ptr;
263 }
264 #endif
265 return TRUE;
266 }
267
268
269 /***********************************************************************
270 * compare_view
271 *
272 * View comparison function used for the rb tree.
273 */
274 static int compare_view( const void *addr, const struct wine_rb_entry *entry )
275 {
276 struct file_view *view = WINE_RB_ENTRY_VALUE( entry, struct file_view, entry );
277
278 if (addr < view->base) return -1;
279 if (addr > view->base) return 1;
280 return 0;
281 }
282
283
284 /***********************************************************************
285 * VIRTUAL_GetProtStr
286 */
287 static const char *VIRTUAL_GetProtStr( BYTE prot )
288 {
289 static char buffer[6];
290 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
291 buffer[1] = (prot & VPROT_GUARD) ? 'g' : ((prot & VPROT_WRITEWATCH) ? 'H' : '-');
292 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
293 buffer[3] = (prot & VPROT_WRITECOPY) ? 'W' : ((prot & VPROT_WRITE) ? 'w' : '-');
294 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
295 buffer[5] = 0;
296 return buffer;
297 }
298
299
300 /***********************************************************************
301 * VIRTUAL_GetUnixProt
302 *
303 * Convert page protections to protection for mmap/mprotect.
304 */
305 static int VIRTUAL_GetUnixProt( BYTE vprot )
306 {
307 int prot = 0;
308 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
309 {
310 if (vprot & VPROT_READ) prot |= PROT_READ;
311 if (vprot & VPROT_WRITE) prot |= PROT_WRITE | PROT_READ;
312 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE | PROT_READ;
313 if (vprot & VPROT_EXEC) prot |= PROT_EXEC | PROT_READ;
314 if (vprot & VPROT_WRITEWATCH) prot &= ~PROT_WRITE;
315 }
316 if (!prot) prot = PROT_NONE;
317 return prot;
318 }
319
320
321 /***********************************************************************
322 * VIRTUAL_DumpView
323 */
324 static void VIRTUAL_DumpView( struct file_view *view )
325 {
326 UINT i, count;
327 char *addr = view->base;
328 BYTE prot = get_page_vprot( addr );
329
330 TRACE( "View: %p - %p", addr, addr + view->size - 1 );
331 if (view->protect & VPROT_SYSTEM)
332 TRACE( " (builtin image)\n" );
333 else if (view->protect & SEC_IMAGE)
334 TRACE( " (image)\n" );
335 else if (view->protect & SEC_FILE)
336 TRACE( " (file)\n" );
337 else if (view->protect & (SEC_RESERVE | SEC_COMMIT))
338 TRACE( " (anonymous)\n" );
339 else
340 TRACE( " (valloc)\n");
341
342 for (count = i = 1; i < view->size >> page_shift; i++, count++)
343 {
344 BYTE next = get_page_vprot( addr + (count << page_shift) );
345 if (next == prot) continue;
346 TRACE( " %p - %p %s\n",
347 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
348 addr += (count << page_shift);
349 prot = next;
350 count = 0;
351 }
352 if (count)
353 TRACE( " %p - %p %s\n",
354 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
355 }
356
357
358 /***********************************************************************
359 * VIRTUAL_Dump
360 */
361 #ifdef WINE_VM_DEBUG
362 static void VIRTUAL_Dump(void)
363 {
364 sigset_t sigset;
365 struct file_view *view;
366
367 TRACE( "Dump of all virtual memory views:\n" );
368 server_enter_uninterrupted_section( &csVirtual, &sigset );
369 WINE_RB_FOR_EACH_ENTRY( view, &views_tree, struct file_view, entry )
370 {
371 VIRTUAL_DumpView( view );
372 }
373 server_leave_uninterrupted_section( &csVirtual, &sigset );
374 }
375 #endif
376
377
378 /***********************************************************************
379 * VIRTUAL_FindView
380 *
381 * Find the view containing a given address. The csVirtual section must be held by caller.
382 *
383 * PARAMS
384 * addr [I] Address
385 *
386 * RETURNS
387 * View: Success
388 * NULL: Failure
389 */
390 static struct file_view *VIRTUAL_FindView( const void *addr, size_t size )
391 {
392 struct wine_rb_entry *ptr = views_tree.root;
393
394 if ((const char *)addr + size < (const char *)addr) return NULL; /* overflow */
395
396 while (ptr)
397 {
398 struct file_view *view = WINE_RB_ENTRY_VALUE( ptr, struct file_view, entry );
399
400 if (view->base > addr) ptr = ptr->left;
401 else if ((const char *)view->base + view->size <= (const char *)addr) ptr = ptr->right;
402 else if ((const char *)view->base + view->size < (const char *)addr + size) break; /* size too large */
403 else return view;
404 }
405 return NULL;
406 }
407
408
409 /***********************************************************************
410 * get_mask
411 */
412 static inline UINT_PTR get_mask( ULONG zero_bits )
413 {
414 if (!zero_bits) return 0xffff; /* allocations are aligned to 64K by default */
415 if (zero_bits < page_shift) zero_bits = page_shift;
416 if (zero_bits > 21) return 0;
417 return (1 << zero_bits) - 1;
418 }
419
420
421 /***********************************************************************
422 * is_write_watch_range
423 */
424 static inline BOOL is_write_watch_range( const void *addr, size_t size )
425 {
426 struct file_view *view = VIRTUAL_FindView( addr, size );
427 return view && (view->protect & VPROT_WRITEWATCH);
428 }
429
430
431 /***********************************************************************
432 * find_view_range
433 *
434 * Find the first view overlapping at least part of the specified range.
435 * The csVirtual section must be held by caller.
436 */
437 static struct file_view *find_view_range( const void *addr, size_t size )
438 {
439 struct wine_rb_entry *ptr = views_tree.root;
440
441 while (ptr)
442 {
443 struct file_view *view = WINE_RB_ENTRY_VALUE( ptr, struct file_view, entry );
444
445 if ((const char *)view->base >= (const char *)addr + size) ptr = ptr->left;
446 else if ((const char *)view->base + view->size <= (const char *)addr) ptr = ptr->right;
447 else return view;
448 }
449 return NULL;
450 }
451
452
453 /***********************************************************************
454 * find_free_area
455 *
456 * Find a free area between views inside the specified range.
457 * The csVirtual section must be held by caller.
458 */
459 static void *find_free_area( void *base, void *end, size_t size, size_t mask, int top_down )
460 {
461 struct wine_rb_entry *first = NULL, *ptr = views_tree.root;
462 void *start;
463
464 /* find the first (resp. last) view inside the range */
465 while (ptr)
466 {
467 struct file_view *view = WINE_RB_ENTRY_VALUE( ptr, struct file_view, entry );
468 if ((char *)view->base + view->size >= (char *)end)
469 {
470 end = min( end, view->base );
471 ptr = ptr->left;
472 }
473 else if (view->base <= base)
474 {
475 base = max( (char *)base, (char *)view->base + view->size );
476 ptr = ptr->right;
477 }
478 else
479 {
480 first = ptr;
481 ptr = top_down ? ptr->right : ptr->left;
482 }
483 }
484
485 if (top_down)
486 {
487 start = ROUND_ADDR( (char *)end - size, mask );
488 if (start >= end || start < base) return NULL;
489
490 while (first)
491 {
492 struct file_view *view = WINE_RB_ENTRY_VALUE( first, struct file_view, entry );
493
494 if ((char *)view->base + view->size <= (char *)start) break;
495 start = ROUND_ADDR( (char *)view->base - size, mask );
496 /* stop if remaining space is not large enough */
497 if (!start || start >= end || start < base) return NULL;
498 first = wine_rb_prev( first );
499 }
500 }
501 else
502 {
503 start = ROUND_ADDR( (char *)base + mask, mask );
504 if (!start || start >= end || (char *)end - (char *)start < size) return NULL;
505
506 while (first)
507 {
508 struct file_view *view = WINE_RB_ENTRY_VALUE( first, struct file_view, entry );
509
510 if ((char *)view->base >= (char *)start + size) break;
511 start = ROUND_ADDR( (char *)view->base + view->size + mask, mask );
512 /* stop if remaining space is not large enough */
513 if (!start || start >= end || (char *)end - (char *)start < size) return NULL;
514 first = wine_rb_next( first );
515 }
516 }
517 return start;
518 }
519
520
521 /***********************************************************************
522 * add_reserved_area
523 *
524 * Add a reserved area to the list maintained by libwine.
525 * The csVirtual section must be held by caller.
526 */
527 static void add_reserved_area( void *addr, size_t size )
528 {
529 TRACE( "adding %p-%p\n", addr, (char *)addr + size );
530
531 if (addr < user_space_limit)
532 {
533 /* unmap the part of the area that is below the limit */
534 assert( (char *)addr + size > (char *)user_space_limit );
535 munmap( addr, (char *)user_space_limit - (char *)addr );
536 size -= (char *)user_space_limit - (char *)addr;
537 addr = user_space_limit;
538 }
539 /* blow away existing mappings */
540 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
541 wine_mmap_add_reserved_area( addr, size );
542 }
543
544
545 /***********************************************************************
546 * remove_reserved_area
547 *
548 * Remove a reserved area from the list maintained by libwine.
549 * The csVirtual section must be held by caller.
550 */
551 static void remove_reserved_area( void *addr, size_t size )
552 {
553 struct file_view *view;
554
555 TRACE( "removing %p-%p\n", addr, (char *)addr + size );
556 wine_mmap_remove_reserved_area( addr, size, 0 );
557
558 /* unmap areas not covered by an existing view */
559 WINE_RB_FOR_EACH_ENTRY( view, &views_tree, struct file_view, entry )
560 {
561 if ((char *)view->base >= (char *)addr + size) break;
562 if ((char *)view->base + view->size <= (char *)addr) continue;
563 if (view->base > addr) munmap( addr, (char *)view->base - (char *)addr );
564 if ((char *)view->base + view->size > (char *)addr + size) return;
565 size = (char *)addr + size - ((char *)view->base + view->size);
566 addr = (char *)view->base + view->size;
567 }
568 munmap( addr, size );
569 }
570
571
572 struct area_boundary
573 {
574 void *base;
575 size_t size;
576 void *boundary;
577 };
578
579 /***********************************************************************
580 * get_area_boundary_callback
581 *
582 * Get lowest boundary address between reserved area and non-reserved area
583 * in the specified region. If no boundaries are found, result is NULL.
584 * The csVirtual section must be held by caller.
585 */
586 static int get_area_boundary_callback( void *start, size_t size, void *arg )
587 {
588 struct area_boundary *area = arg;
589 void *end = (char *)start + size;
590
591 area->boundary = NULL;
592 if (area->base >= end) return 0;
593 if ((char *)start >= (char *)area->base + area->size) return 1;
594 if (area->base >= start)
595 {
596 if ((char *)area->base + area->size > (char *)end)
597 {
598 area->boundary = end;
599 return 1;
600 }
601 return 0;
602 }
603 area->boundary = start;
604 return 1;
605 }
606
607
608 /***********************************************************************
609 * is_beyond_limit
610 *
611 * Check if an address range goes beyond a given limit.
612 */
613 static inline BOOL is_beyond_limit( const void *addr, size_t size, const void *limit )
614 {
615 return (addr >= limit || (const char *)addr + size > (const char *)limit);
616 }
617
618
619 /***********************************************************************
620 * unmap_area
621 *
622 * Unmap an area, or simply replace it by an empty mapping if it is
623 * in a reserved area. The csVirtual section must be held by caller.
624 */
625 static inline void unmap_area( void *addr, size_t size )
626 {
627 switch (wine_mmap_is_in_reserved_area( addr, size ))
628 {
629 case -1: /* partially in a reserved area */
630 {
631 struct area_boundary area;
632 size_t lower_size;
633 area.base = addr;
634 area.size = size;
635 wine_mmap_enum_reserved_areas( get_area_boundary_callback, &area, 0 );
636 assert( area.boundary );
637 lower_size = (char *)area.boundary - (char *)addr;
638 unmap_area( addr, lower_size );
639 unmap_area( area.boundary, size - lower_size );
640 break;
641 }
642 case 1: /* in a reserved area */
643 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
644 break;
645 default:
646 case 0: /* not in a reserved area */
647 if (is_beyond_limit( addr, size, user_space_limit ))
648 add_reserved_area( addr, size );
649 else
650 munmap( addr, size );
651 break;
652 }
653 }
654
655
656 /***********************************************************************
657 * alloc_view
658 *
659 * Allocate a new view. The csVirtual section must be held by caller.
660 */
661 static struct file_view *alloc_view(void)
662 {
663 if (next_free_view)
664 {
665 struct file_view *ret = next_free_view;
666 next_free_view = *(struct file_view **)ret;
667 return ret;
668 }
669 if (view_block_start == view_block_end)
670 {
671 void *ptr = wine_anon_mmap( NULL, view_block_size, PROT_READ | PROT_WRITE, 0 );
672 if (ptr == (void *)-1) return NULL;
673 view_block_start = ptr;
674 view_block_end = view_block_start + view_block_size / sizeof(*view_block_start);
675 }
676 return view_block_start++;
677 }
678
679
680 /***********************************************************************
681 * delete_view
682 *
683 * Deletes a view. The csVirtual section must be held by caller.
684 */
685 static void delete_view( struct file_view *view ) /* [in] View */
686 {
687 if (!(view->protect & VPROT_SYSTEM)) unmap_area( view->base, view->size );
688 set_page_vprot( view->base, view->size, 0 );
689 wine_rb_remove( &views_tree, &view->entry );
690 *(struct file_view **)view = next_free_view;
691 next_free_view = view;
692 }
693
694
695 /***********************************************************************
696 * create_view
697 *
698 * Create a view. The csVirtual section must be held by caller.
699 */
700 static NTSTATUS create_view( struct file_view **view_ret, void *base, size_t size, unsigned int vprot )
701 {
702 struct file_view *view;
703 int unix_prot = VIRTUAL_GetUnixProt( vprot );
704
705 assert( !((UINT_PTR)base & page_mask) );
706 assert( !(size & page_mask) );
707
708 /* Check for overlapping views. This can happen if the previous view
709 * was a system view that got unmapped behind our back. In that case
710 * we recover by simply deleting it. */
711
712 while ((view = find_view_range( base, size )))
713 {
714 TRACE( "overlapping view %p-%p for %p-%p\n",
715 view->base, (char *)view->base + view->size, base, (char *)base + size );
716 assert( view->protect & VPROT_SYSTEM );
717 delete_view( view );
718 }
719
720 if (!alloc_pages_vprot( base, size )) return STATUS_NO_MEMORY;
721
722 /* Create the view structure */
723
724 if (!(view = alloc_view()))
725 {
726 FIXME( "out of memory for %p-%p\n", base, (char *)base + size );
727 return STATUS_NO_MEMORY;
728 }
729
730 view->base = base;
731 view->size = size;
732 view->protect = vprot;
733 set_page_vprot( base, size, vprot );
734
735 wine_rb_put( &views_tree, view->base, &view->entry );
736
737 *view_ret = view;
738
739 if (force_exec_prot && (unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
740 {
741 TRACE( "forcing exec permission on %p-%p\n", base, (char *)base + size - 1 );
742 mprotect( base, size, unix_prot | PROT_EXEC );
743 }
744 return STATUS_SUCCESS;
745 }
746
747
748 /***********************************************************************
749 * VIRTUAL_GetWin32Prot
750 *
751 * Convert page protections to Win32 flags.
752 */
753 static DWORD VIRTUAL_GetWin32Prot( BYTE vprot, unsigned int map_prot )
754 {
755 DWORD ret = VIRTUAL_Win32Flags[vprot & 0x0f];
756 if (vprot & VPROT_GUARD) ret |= PAGE_GUARD;
757 if (map_prot & SEC_NOCACHE) ret |= PAGE_NOCACHE;
758 return ret;
759 }
760
761
762 /***********************************************************************
763 * get_vprot_flags
764 *
765 * Build page protections from Win32 flags.
766 *
767 * PARAMS
768 * protect [I] Win32 protection flags
769 *
770 * RETURNS
771 * Value of page protection flags
772 */
773 static NTSTATUS get_vprot_flags( DWORD protect, unsigned int *vprot, BOOL image )
774 {
775 switch(protect & 0xff)
776 {
777 case PAGE_READONLY:
778 *vprot = VPROT_READ;
779 break;
780 case PAGE_READWRITE:
781 if (image)
782 *vprot = VPROT_READ | VPROT_WRITECOPY;
783 else
784 *vprot = VPROT_READ | VPROT_WRITE;
785 break;
786 case PAGE_WRITECOPY:
787 *vprot = VPROT_READ | VPROT_WRITECOPY;
788 break;
789 case PAGE_EXECUTE:
790 *vprot = VPROT_EXEC;
791 break;
792 case PAGE_EXECUTE_READ:
793 *vprot = VPROT_EXEC | VPROT_READ;
794 break;
795 case PAGE_EXECUTE_READWRITE:
796 if (image)
797 *vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
798 else
799 *vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
800 break;
801 case PAGE_EXECUTE_WRITECOPY:
802 *vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
803 break;
804 case PAGE_NOACCESS:
805 *vprot = 0;
806 break;
807 default:
808 return STATUS_INVALID_PAGE_PROTECTION;
809 }
810 if (protect & PAGE_GUARD) *vprot |= VPROT_GUARD;
811 return STATUS_SUCCESS;
812 }
813
814
815 /***********************************************************************
816 * mprotect_exec
817 *
818 * Wrapper for mprotect, adds PROT_EXEC if forced by force_exec_prot
819 */
820 static inline int mprotect_exec( void *base, size_t size, int unix_prot )
821 {
822 if (force_exec_prot && (unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
823 {
824 TRACE( "forcing exec permission on %p-%p\n", base, (char *)base + size - 1 );
825 if (!mprotect( base, size, unix_prot | PROT_EXEC )) return 0;
826 /* exec + write may legitimately fail, in that case fall back to write only */
827 if (!(unix_prot & PROT_WRITE)) return -1;
828 }
829
830 return mprotect( base, size, unix_prot );
831 }
832
833
834 /***********************************************************************
835 * mprotect_range
836 *
837 * Call mprotect on a page range, applying the protections from the per-page byte.
838 */
839 static void mprotect_range( void *base, size_t size, BYTE set, BYTE clear )
840 {
841 size_t i, count;
842 char *addr = ROUND_ADDR( base, page_mask );
843 int prot, next;
844
845 size = ROUND_SIZE( base, size );
846 prot = VIRTUAL_GetUnixProt( (get_page_vprot( addr ) & ~clear ) | set );
847 for (count = i = 1; i < size >> page_shift; i++, count++)
848 {
849 next = VIRTUAL_GetUnixProt( (get_page_vprot( addr + (count << page_shift) ) & ~clear) | set );
850 if (next == prot) continue;
851 mprotect_exec( addr, count << page_shift, prot );
852 addr += count << page_shift;
853 prot = next;
854 count = 0;
855 }
856 if (count) mprotect_exec( addr, count << page_shift, prot );
857 }
858
859
860 /***********************************************************************
861 * VIRTUAL_SetProt
862 *
863 * Change the protection of a range of pages.
864 *
865 * RETURNS
866 * TRUE: Success
867 * FALSE: Failure
868 */
869 static BOOL VIRTUAL_SetProt( struct file_view *view, /* [in] Pointer to view */
870 void *base, /* [in] Starting address */
871 size_t size, /* [in] Size in bytes */
872 BYTE vprot ) /* [in] Protections to use */
873 {
874 int unix_prot = VIRTUAL_GetUnixProt(vprot);
875
876 if (view->protect & VPROT_WRITEWATCH)
877 {
878 /* each page may need different protections depending on write watch flag */
879 set_page_vprot_bits( base, size, vprot & ~VPROT_WRITEWATCH, ~vprot & ~VPROT_WRITEWATCH );
880 mprotect_range( base, size, 0, 0 );
881 return TRUE;
882 }
883
884 /* if setting stack guard pages, store the permissions first, as the guard may be
885 * triggered at any point after mprotect and change the permissions again */
886 if ((vprot & VPROT_GUARD) &&
887 (base >= NtCurrentTeb()->DeallocationStack) &&
888 (base < NtCurrentTeb()->Tib.StackBase))
889 {
890 set_page_vprot( base, size, vprot );
891 mprotect( base, size, unix_prot );
892 return TRUE;
893 }
894
895 if (mprotect_exec( base, size, unix_prot )) /* FIXME: last error */
896 return FALSE;
897
898 set_page_vprot( base, size, vprot );
899 return TRUE;
900 }
901
902
903 /***********************************************************************
904 * set_protection
905 *
906 * Set page protections on a range of pages
907 */
908 static NTSTATUS set_protection( struct file_view *view, void *base, SIZE_T size, ULONG protect )
909 {
910 unsigned int vprot;
911 NTSTATUS status;
912
913 if ((status = get_vprot_flags( protect, &vprot, view->protect & SEC_IMAGE ))) return status;
914 if (is_view_valloc( view ))
915 {
916 if (vprot & VPROT_WRITECOPY) return STATUS_INVALID_PAGE_PROTECTION;
917 }
918 else
919 {
920 BYTE access = vprot & (VPROT_READ | VPROT_WRITE | VPROT_EXEC);
921 if ((view->protect & access) != access) return STATUS_INVALID_PAGE_PROTECTION;
922 }
923
924 if (!VIRTUAL_SetProt( view, base, size, vprot | VPROT_COMMITTED )) return STATUS_ACCESS_DENIED;
925 return STATUS_SUCCESS;
926 }
927
928
929 /***********************************************************************
930 * update_write_watches
931 */
932 static void update_write_watches( void *base, size_t size, size_t accessed_size )
933 {
934 TRACE( "updating watch %p-%p-%p\n", base, (char *)base + accessed_size, (char *)base + size );
935 /* clear write watch flag on accessed pages */
936 set_page_vprot_bits( base, accessed_size, 0, VPROT_WRITEWATCH );
937 /* restore page protections on the entire range */
938 mprotect_range( base, size, 0, 0 );
939 }
940
941
942 /***********************************************************************
943 * reset_write_watches
944 *
945 * Reset write watches in a memory range.
946 */
947 static void reset_write_watches( void *base, SIZE_T size )
948 {
949 set_page_vprot_bits( base, size, VPROT_WRITEWATCH, 0 );
950 mprotect_range( base, size, 0, 0 );
951 }
952
953
954 /***********************************************************************
955 * unmap_extra_space
956 *
957 * Release the extra memory while keeping the range starting on the granularity boundary.
958 */
959 static inline void *unmap_extra_space( void *ptr, size_t total_size, size_t wanted_size, size_t mask )
960 {
961 if ((ULONG_PTR)ptr & mask)
962 {
963 size_t extra = mask + 1 - ((ULONG_PTR)ptr & mask);
964 munmap( ptr, extra );
965 ptr = (char *)ptr + extra;
966 total_size -= extra;
967 }
968 if (total_size > wanted_size)
969 munmap( (char *)ptr + wanted_size, total_size - wanted_size );
970 return ptr;
971 }
972
973
974 struct alloc_area
975 {
976 size_t size;
977 size_t mask;
978 int top_down;
979 void *limit;
980 void *result;
981 };
982
983 /***********************************************************************
984 * alloc_reserved_area_callback
985 *
986 * Try to map some space inside a reserved area. Callback for wine_mmap_enum_reserved_areas.
987 */
988 static int alloc_reserved_area_callback( void *start, size_t size, void *arg )
989 {
990 struct alloc_area *alloc = arg;
991 void *end = (char *)start + size;
992
993 if (start < address_space_start) start = address_space_start;
994 if (is_beyond_limit( start, size, alloc->limit )) end = alloc->limit;
995 if (start >= end) return 0;
996
997 /* make sure we don't touch the preloader reserved range */
998 if (preload_reserve_end >= start)
999 {
1000 if (preload_reserve_end >= end)
1001 {
1002 if (preload_reserve_start <= start) return 0; /* no space in that area */
1003 if (preload_reserve_start < end) end = preload_reserve_start;
1004 }
1005 else if (preload_reserve_start <= start) start = preload_reserve_end;
1006 else
1007 {
1008 /* range is split in two by the preloader reservation, try first part */
1009 if ((alloc->result = find_free_area( start, preload_reserve_start, alloc->size,
1010 alloc->mask, alloc->top_down )))
1011 return 1;
1012 /* then fall through to try second part */
1013 start = preload_reserve_end;
1014 }
1015 }
1016 if ((alloc->result = find_free_area( start, end, alloc->size, alloc->mask, alloc->top_down )))
1017 return 1;
1018
1019 return 0;
1020 }
1021
1022 /***********************************************************************
1023 * map_fixed_area
1024 *
1025 * mmap the fixed memory area.
1026 * The csVirtual section must be held by caller.
1027 */
1028 static NTSTATUS map_fixed_area( void *base, size_t size, unsigned int vprot )
1029 {
1030 void *ptr;
1031
1032 switch (wine_mmap_is_in_reserved_area( base, size ))
1033 {
1034 case -1: /* partially in a reserved area */
1035 {
1036 NTSTATUS status;
1037 struct area_boundary area;
1038 size_t lower_size;
1039 area.base = base;
1040 area.size = size;
1041 wine_mmap_enum_reserved_areas( get_area_boundary_callback, &area, 0 );
1042 assert( area.boundary );
1043 lower_size = (char *)area.boundary - (char *)base;
1044 status = map_fixed_area( base, lower_size, vprot );
1045 if (status == STATUS_SUCCESS)
1046 {
1047 status = map_fixed_area( area.boundary, size - lower_size, vprot);
1048 if (status != STATUS_SUCCESS) unmap_area( base, lower_size );
1049 }
1050 return status;
1051 }
1052 case 0: /* not in a reserved area, do a normal allocation */
1053 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
1054 {
1055 if (errno == ENOMEM) return STATUS_NO_MEMORY;
1056 return STATUS_INVALID_PARAMETER;
1057 }
1058 if (ptr != base)
1059 {
1060 /* We couldn't get the address we wanted */
1061 if (is_beyond_limit( ptr, size, user_space_limit )) add_reserved_area( ptr, size );
1062 else munmap( ptr, size );
1063 return STATUS_CONFLICTING_ADDRESSES;
1064 }
1065 break;
1066
1067 default:
1068 case 1: /* in a reserved area, make sure the address is available */
1069 if (find_view_range( base, size )) return STATUS_CONFLICTING_ADDRESSES;
1070 /* replace the reserved area by our mapping */
1071 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED )) != base)
1072 return STATUS_INVALID_PARAMETER;
1073 break;
1074 }
1075 if (is_beyond_limit( ptr, size, working_set_limit )) working_set_limit = address_space_limit;
1076 return STATUS_SUCCESS;
1077 }
1078
1079 /***********************************************************************
1080 * map_view
1081 *
1082 * Create a view and mmap the corresponding memory area.
1083 * The csVirtual section must be held by caller.
1084 */
1085 static NTSTATUS map_view( struct file_view **view_ret, void *base, size_t size, size_t mask,
1086 int top_down, unsigned int vprot )
1087 {
1088 void *ptr;
1089 NTSTATUS status;
1090
1091 if (base)
1092 {
1093 if (is_beyond_limit( base, size, address_space_limit ))
1094 return STATUS_WORKING_SET_LIMIT_RANGE;
1095 status = map_fixed_area( base, size, vprot );
1096 if (status != STATUS_SUCCESS) return status;
1097 ptr = base;
1098 }
1099 else
1100 {
1101 size_t view_size = size + mask + 1;
1102 struct alloc_area alloc;
1103
1104 alloc.size = size;
1105 alloc.mask = mask;
1106 alloc.top_down = top_down;
1107 alloc.limit = user_space_limit;
1108 if (wine_mmap_enum_reserved_areas( alloc_reserved_area_callback, &alloc, top_down ))
1109 {
1110 ptr = alloc.result;
1111 TRACE( "got mem in reserved area %p-%p\n", ptr, (char *)ptr + size );
1112 if (wine_anon_mmap( ptr, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED ) != ptr)
1113 return STATUS_INVALID_PARAMETER;
1114 goto done;
1115 }
1116
1117 for (;;)
1118 {
1119 if ((ptr = wine_anon_mmap( NULL, view_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
1120 {
1121 if (errno == ENOMEM) return STATUS_NO_MEMORY;
1122 return STATUS_INVALID_PARAMETER;
1123 }
1124 TRACE( "got mem with anon mmap %p-%p\n", ptr, (char *)ptr + size );
1125 /* if we got something beyond the user limit, unmap it and retry */
1126 if (is_beyond_limit( ptr, view_size, user_space_limit )) add_reserved_area( ptr, view_size );
1127 else break;
1128 }
1129 ptr = unmap_extra_space( ptr, view_size, size, mask );
1130 }
1131 done:
1132 status = create_view( view_ret, ptr, size, vprot );
1133 if (status != STATUS_SUCCESS) unmap_area( ptr, size );
1134 return status;
1135 }
1136
1137
1138 /***********************************************************************
1139 * map_file_into_view
1140 *
1141 * Wrapper for mmap() to map a file into a view, falling back to read if mmap fails.
1142 * The csVirtual section must be held by caller.
1143 */
1144 static NTSTATUS map_file_into_view( struct file_view *view, int fd, size_t start, size_t size,
1145 off_t offset, unsigned int vprot, BOOL removable )
1146 {
1147 void *ptr;
1148 int prot = VIRTUAL_GetUnixProt( vprot | VPROT_COMMITTED /* make sure it is accessible */ );
1149 unsigned int flags = MAP_FIXED | ((vprot & VPROT_WRITECOPY) ? MAP_PRIVATE : MAP_SHARED);
1150
1151 assert( start < view->size );
1152 assert( start + size <= view->size );
1153
1154 if (force_exec_prot && (vprot & VPROT_READ))
1155 {
1156 TRACE( "forcing exec permission on mapping %p-%p\n",
1157 (char *)view->base + start, (char *)view->base + start + size - 1 );
1158 prot |= PROT_EXEC;
1159 }
1160
1161 /* only try mmap if media is not removable (or if we require write access) */
1162 if (!removable || (flags & MAP_SHARED))
1163 {
1164 if (mmap( (char *)view->base + start, size, prot, flags, fd, offset ) != (void *)-1)
1165 goto done;
1166
1167 switch (errno)
1168 {
1169 case EINVAL: /* file offset is not page-aligned, fall back to read() */
1170 if (flags & MAP_SHARED) return STATUS_INVALID_PARAMETER;
1171 break;
1172 case ENOEXEC:
1173 case ENODEV: /* filesystem doesn't support mmap(), fall back to read() */
1174 if (flags & MAP_SHARED)
1175 {
1176 ERR( "shared writable mmap not supported, broken filesystem?\n" );
1177 return STATUS_NOT_SUPPORTED;
1178 }
1179 break;
1180 case EACCES:
1181 case EPERM: /* noexec filesystem, fall back to read() */
1182 if (flags & MAP_SHARED)
1183 {
1184 if (prot & PROT_EXEC) ERR( "failed to set PROT_EXEC on file map, noexec filesystem?\n" );
1185 return STATUS_ACCESS_DENIED;
1186 }
1187 if (prot & PROT_EXEC) WARN( "failed to set PROT_EXEC on file map, noexec filesystem?\n" );
1188 break;
1189 default:
1190 return FILE_GetNtStatus();
1191 }
1192 }
1193
1194 /* Reserve the memory with an anonymous mmap */
1195 ptr = wine_anon_mmap( (char *)view->base + start, size, PROT_READ | PROT_WRITE, MAP_FIXED );
1196 if (ptr == (void *)-1) return FILE_GetNtStatus();
1197 /* Now read in the file */
1198 pread( fd, ptr, size, offset );
1199 if (prot != (PROT_READ|PROT_WRITE)) mprotect( ptr, size, prot ); /* Set the right protection */
1200 done:
1201 set_page_vprot( (char *)view->base + start, size, vprot );
1202 return STATUS_SUCCESS;
1203 }
1204
1205
1206 /***********************************************************************
1207 * get_committed_size
1208 *
1209 * Get the size of the committed range starting at base.
1210 * Also return the protections for the first page.
1211 */
1212 static SIZE_T get_committed_size( struct file_view *view, void *base, BYTE *vprot )
1213 {
1214 SIZE_T i, start;
1215
1216 start = ((char *)base - (char *)view->base) >> page_shift;
1217 *vprot = get_page_vprot( base );
1218
1219 if (view->protect & SEC_RESERVE)
1220 {
1221 SIZE_T ret = 0;
1222 SERVER_START_REQ( get_mapping_committed_range )
1223 {
1224 req->base = wine_server_client_ptr( view->base );
1225 req->offset = start << page_shift;
1226 if (!wine_server_call( req ))
1227 {
1228 ret = reply->size;
1229 if (reply->committed)
1230 {
1231 *vprot |= VPROT_COMMITTED;
1232 set_page_vprot_bits( base, ret, VPROT_COMMITTED, 0 );
1233 }
1234 }
1235 }
1236 SERVER_END_REQ;
1237 return ret;
1238 }
1239 for (i = start + 1; i < view->size >> page_shift; i++)
1240 if ((*vprot ^ get_page_vprot( (char *)view->base + (i << page_shift) )) & VPROT_COMMITTED) break;
1241 return (i - start) << page_shift;
1242 }
1243
1244
1245 /***********************************************************************
1246 * decommit_view
1247 *
1248 * Decommit some pages of a given view.
1249 * The csVirtual section must be held by caller.
1250 */
1251 static NTSTATUS decommit_pages( struct file_view *view, size_t start, size_t size )
1252 {
1253 if (wine_anon_mmap( (char *)view->base + start, size, PROT_NONE, MAP_FIXED ) != (void *)-1)
1254 {
1255 set_page_vprot_bits( (char *)view->base + start, size, 0, VPROT_COMMITTED );
1256 return STATUS_SUCCESS;
1257 }
1258 return FILE_GetNtStatus();
1259 }
1260
1261
1262 /***********************************************************************
1263 * allocate_dos_memory
1264 *
1265 * Allocate the DOS memory range.
1266 */
1267 static NTSTATUS allocate_dos_memory( struct file_view **view, unsigned int vprot )
1268 {
1269 size_t size;
1270 void *addr = NULL;
1271 void * const low_64k = (void *)0x10000;
1272 const size_t dosmem_size = 0x110000;
1273 int unix_prot = VIRTUAL_GetUnixProt( vprot );
1274
1275 /* check for existing view */
1276
1277 if (find_view_range( 0, dosmem_size )) return STATUS_CONFLICTING_ADDRESSES;
1278
1279 /* check without the first 64K */
1280
1281 if (wine_mmap_is_in_reserved_area( low_64k, dosmem_size - 0x10000 ) != 1)
1282 {
1283 addr = wine_anon_mmap( low_64k, dosmem_size - 0x10000, unix_prot, 0 );
1284 if (addr != low_64k)
1285 {
1286 if (addr != (void *)-1) munmap( addr, dosmem_size - 0x10000 );
1287 return map_view( view, NULL, dosmem_size, 0xffff, 0, vprot );
1288 }
1289 }
1290
1291 /* now try to allocate the low 64K too */
1292
1293 if (wine_mmap_is_in_reserved_area( NULL, 0x10000 ) != 1)
1294 {
1295 addr = wine_anon_mmap( (void *)page_size, 0x10000 - page_size, unix_prot, 0 );
1296 if (addr == (void *)page_size)
1297 {
1298 if (!wine_anon_mmap( NULL, page_size, unix_prot, MAP_FIXED ))
1299 {
1300 addr = NULL;
1301 TRACE( "successfully mapped low 64K range\n" );
1302 }
1303 else TRACE( "failed to map page 0\n" );
1304 }
1305 else
1306 {
1307 if (addr != (void *)-1) munmap( addr, 0x10000 - page_size );
1308 addr = low_64k;
1309 TRACE( "failed to map low 64K range\n" );
1310 }
1311 }
1312
1313 /* now reserve the whole range */
1314
1315 size = (char *)dosmem_size - (char *)addr;
1316 wine_anon_mmap( addr, size, unix_prot, MAP_FIXED );
1317 return create_view( view, addr, size, vprot );
1318 }
1319
1320
1321 /***********************************************************************
1322 * map_pe_header
1323 *
1324 * Map the header of a PE file into memory.
1325 */
1326 static NTSTATUS map_pe_header( void *ptr, size_t size, int fd, BOOL *removable )
1327 {
1328 if (!size) return STATUS_INVALID_IMAGE_FORMAT;
1329
1330 if (!*removable)
1331 {
1332 if (mmap( ptr, size, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_FIXED|MAP_PRIVATE, fd, 0 ) != (void *)-1)
1333 return STATUS_SUCCESS;
1334
1335 switch (errno)
1336 {
1337 case EPERM:
1338 case EACCES:
1339 WARN( "noexec file system, falling back to read\n" );
1340 break;
1341 case ENOEXEC:
1342 case ENODEV:
1343 WARN( "file system doesn't support mmap, falling back to read\n" );
1344 break;
1345 default:
1346 return FILE_GetNtStatus();
1347 }
1348 *removable = TRUE;
1349 }
1350 pread( fd, ptr, size, 0 );
1351 return STATUS_SUCCESS; /* page protections will be updated later */
1352 }
1353
1354
1355 /***********************************************************************
1356 * map_image
1357 *
1358 * Map an executable (PE format) image into memory.
1359 */
1360 static NTSTATUS map_image( HANDLE hmapping, ACCESS_MASK access, int fd, char *base, SIZE_T total_size,
1361 SIZE_T mask, SIZE_T header_size, int shared_fd, BOOL removable, PVOID *addr_ptr )
1362 {
1363 IMAGE_DOS_HEADER *dos;
1364 IMAGE_NT_HEADERS *nt;
1365 IMAGE_SECTION_HEADER sections[96];
1366 IMAGE_SECTION_HEADER *sec;
1367 IMAGE_DATA_DIRECTORY *imports;
1368 NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
1369 int i;
1370 off_t pos;
1371 sigset_t sigset;
1372 struct stat st;
1373 struct file_view *view = NULL;
1374 char *ptr, *header_end, *header_start;
1375
1376 /* zero-map the whole range */
1377
1378 server_enter_uninterrupted_section( &csVirtual, &sigset );
1379
1380 if (base >= (char *)address_space_start) /* make sure the DOS area remains free */
1381 status = map_view( &view, base, total_size, mask, FALSE, SEC_IMAGE | SEC_FILE |
1382 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY );
1383
1384 if (status != STATUS_SUCCESS)
1385 status = map_view( &view, NULL, total_size, mask, FALSE, SEC_IMAGE | SEC_FILE |
1386 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY );
1387
1388 if (status != STATUS_SUCCESS) goto error;
1389
1390 ptr = view->base;
1391 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
1392
1393 /* map the header */
1394
1395 if (fstat( fd, &st ) == -1)
1396 {
1397 status = FILE_GetNtStatus();
1398 goto error;
1399 }
1400 header_size = min( header_size, st.st_size );
1401 if ((status = map_pe_header( view->base, header_size, fd, &removable )) != STATUS_SUCCESS) goto error;
1402
1403 status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
1404 dos = (IMAGE_DOS_HEADER *)ptr;
1405 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
1406 header_end = ptr + ROUND_SIZE( 0, header_size );
1407 memset( ptr + header_size, 0, header_end - (ptr + header_size) );
1408 if ((char *)(nt + 1) > header_end) goto error;
1409 header_start = (char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader;
1410 if (nt->FileHeader.NumberOfSections > sizeof(sections)/sizeof(*sections)) goto error;
1411 if (header_start + sizeof(*sections) * nt->FileHeader.NumberOfSections > header_end) goto error;
1412 /* Some applications (e.g. the Steam version of Borderlands) map over the top of the section headers,
1413 * copying the headers into local memory is necessary to properly load such applications. */
1414 memcpy(sections, header_start, sizeof(*sections) * nt->FileHeader.NumberOfSections);
1415 sec = sections;
1416
1417 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
1418 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
1419
1420 /* check for non page-aligned binary */
1421
1422 if (nt->OptionalHeader.SectionAlignment <= page_mask)
1423 {
1424 /* unaligned sections, this happens for native subsystem binaries */
1425 /* in that case Windows simply maps in the whole file */
1426
1427 if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1428 removable ) != STATUS_SUCCESS) goto error;
1429
1430 /* check that all sections are loaded at the right offset */
1431 if (nt->OptionalHeader.FileAlignment != nt->OptionalHeader.SectionAlignment) goto error;
1432 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
1433 {
1434 if (sec[i].VirtualAddress != sec[i].PointerToRawData)
1435 goto error; /* Windows refuses to load in that case too */
1436 }
1437
1438 /* set the image protections */
1439 VIRTUAL_SetProt( view, ptr, total_size,
1440 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
1441
1442 /* no relocations are performed on non page-aligned binaries */
1443 goto done;
1444 }
1445
1446
1447 /* map all the sections */
1448
1449 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1450 {
1451 static const SIZE_T sector_align = 0x1ff;
1452 SIZE_T map_size, file_start, file_size, end;
1453
1454 if (!sec->Misc.VirtualSize)
1455 map_size = ROUND_SIZE( 0, sec->SizeOfRawData );
1456 else
1457 map_size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
1458
1459 /* file positions are rounded to sector boundaries regardless of OptionalHeader.FileAlignment */
1460 file_start = sec->PointerToRawData & ~sector_align;
1461 file_size = (sec->SizeOfRawData + (sec->PointerToRawData & sector_align) + sector_align) & ~sector_align;
1462 if (file_size > map_size) file_size = map_size;
1463
1464 /* a few sanity checks */
1465 end = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, map_size );
1466 if (sec->VirtualAddress > total_size || end > total_size || end < sec->VirtualAddress)
1467 {
1468 WARN_(module)( "Section %.8s too large (%x+%lx/%lx)\n",
1469 sec->Name, sec->VirtualAddress, map_size, total_size );
1470 goto error;
1471 }
1472
1473 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
1474 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
1475 {
1476 TRACE_(module)( "mapping shared section %.8s at %p off %x (%x) size %lx (%lx) flags %x\n",
1477 sec->Name, ptr + sec->VirtualAddress,
1478 sec->PointerToRawData, (int)pos, file_size, map_size,
1479 sec->Characteristics );
1480 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, map_size, pos,
1481 VPROT_COMMITTED | VPROT_READ | VPROT_WRITE, FALSE ) != STATUS_SUCCESS)
1482 {
1483 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
1484 goto error;
1485 }
1486
1487 /* check if the import directory falls inside this section */
1488 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
1489 imports->VirtualAddress < sec->VirtualAddress + map_size)
1490 {
1491 UINT_PTR base = imports->VirtualAddress & ~page_mask;
1492 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
1493 if (end > sec->VirtualAddress + map_size) end = sec->VirtualAddress + map_size;
1494 if (end > base)
1495 map_file_into_view( view, shared_fd, base, end - base,
1496 pos + (base - sec->VirtualAddress),
1497 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY, FALSE );
1498 }
1499 pos += map_size;
1500 continue;
1501 }
1502
1503 TRACE_(module)( "mapping section %.8s at %p off %x size %x virt %x flags %x\n",
1504 sec->Name, ptr + sec->VirtualAddress,
1505 sec->PointerToRawData, sec->SizeOfRawData,
1506 sec->Misc.VirtualSize, sec->Characteristics );
1507
1508 if (!sec->PointerToRawData || !file_size) continue;
1509
1510 /* Note: if the section is not aligned properly map_file_into_view will magically
1511 * fall back to read(), so we don't need to check anything here.
1512 */
1513 end = file_start + file_size;
1514 if (sec->PointerToRawData >= st.st_size ||
1515 end > ((st.st_size + sector_align) & ~sector_align) ||
1516 end < file_start ||
1517 map_file_into_view( view, fd, sec->VirtualAddress, file_size, file_start,
1518 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1519 removable ) != STATUS_SUCCESS)
1520 {
1521 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
1522 goto error;
1523 }
1524
1525 if (file_size & page_mask)
1526 {
1527 end = ROUND_SIZE( 0, file_size );
1528 if (end > map_size) end = map_size;
1529 TRACE_(module)("clearing %p - %p\n",
1530 ptr + sec->VirtualAddress + file_size,
1531 ptr + sec->VirtualAddress + end );
1532 memset( ptr + sec->VirtualAddress + file_size, 0, end - file_size );
1533 }
1534 }
1535
1536 /* set the image protections */
1537
1538 VIRTUAL_SetProt( view, ptr, ROUND_SIZE( 0, header_size ), VPROT_COMMITTED | VPROT_READ );
1539
1540 sec = sections;
1541 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1542 {
1543 SIZE_T size;
1544 BYTE vprot = VPROT_COMMITTED;
1545
1546 if (sec->Misc.VirtualSize)
1547 size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
1548 else
1549 size = ROUND_SIZE( sec->VirtualAddress, sec->SizeOfRawData );
1550
1551 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
1552 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_WRITECOPY;
1553 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
1554
1555 /* Dumb game crack lets the AOEP point into a data section. Adjust. */
1556 if ((nt->OptionalHeader.AddressOfEntryPoint >= sec->VirtualAddress) &&
1557 (nt->OptionalHeader.AddressOfEntryPoint < sec->VirtualAddress + size))
1558 vprot |= VPROT_EXEC;
1559
1560 if (!VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot ) && (vprot & VPROT_EXEC))
1561 ERR( "failed to set %08x protection on section %.8s, noexec filesystem?\n",
1562 sec->Characteristics, sec->Name );
1563 }
1564
1565 done:
1566
1567 SERVER_START_REQ( map_view )
1568 {
1569 req->mapping = wine_server_obj_handle( hmapping );
1570 req->access = access;
1571 req->base = wine_server_client_ptr( view->base );
1572 req->size = view->size;
1573 req->start = 0;
1574 status = wine_server_call( req );
1575 }
1576 SERVER_END_REQ;
1577 if (status) goto error;
1578
1579 VIRTUAL_DEBUG_DUMP_VIEW( view );
1580 server_leave_uninterrupted_section( &csVirtual, &sigset );
1581
1582 *addr_ptr = ptr;
1583 #ifdef VALGRIND_LOAD_PDB_DEBUGINFO
1584 VALGRIND_LOAD_PDB_DEBUGINFO(fd, ptr, total_size, ptr - base);
1585 #endif
1586 if (ptr != base) return STATUS_IMAGE_NOT_AT_BASE;
1587 return STATUS_SUCCESS;
1588
1589 error:
1590 if (view) delete_view( view );
1591 server_leave_uninterrupted_section( &csVirtual, &sigset );
1592 return status;
1593 }
1594
1595
1596 struct alloc_virtual_heap
1597 {
1598 void *base;
1599 size_t size;
1600 };
1601
1602 /* callback for wine_mmap_enum_reserved_areas to allocate space for the virtual heap */
1603 static int alloc_virtual_heap( void *base, size_t size, void *arg )
1604 {
1605 struct alloc_virtual_heap *alloc = arg;
1606
1607 if (is_beyond_limit( base, size, address_space_limit )) address_space_limit = (char *)base + size;
1608 if (size < alloc->size) return 0;
1609 if (is_win64 && base < (void *)0x80000000) return 0;
1610 alloc->base = wine_anon_mmap( (char *)base + size - alloc->size, alloc->size,
1611 PROT_READ|PROT_WRITE, MAP_FIXED );
1612 return (alloc->base != (void *)-1);
1613 }
1614
1615 /***********************************************************************
1616 * virtual_init
1617 */
1618 void virtual_init(void)
1619 {
1620 const char *preload;
1621 struct alloc_virtual_heap alloc_views;
1622 size_t size;
1623
1624 #if !defined(__i386__) && !defined(__x86_64__)
1625 page_size = sysconf( _SC_PAGESIZE );
1626 page_mask = page_size - 1;
1627 /* Make sure we have a power of 2 */
1628 assert( !(page_size & page_mask) );
1629 page_shift = 0;
1630 while ((1 << page_shift) != page_size) page_shift++;
1631 #ifdef _WIN64
1632 address_space_limit = (void *)(((1UL << 47) - 1) & ~page_mask);
1633 #else
1634 address_space_limit = (void *)~page_mask;
1635 #endif
1636 user_space_limit = working_set_limit = address_space_limit;
1637 #endif
1638 if ((preload = getenv("WINEPRELOADRESERVE")))
1639 {
1640 unsigned long start, end;
1641 if (sscanf( preload, "%lx-%lx", &start, &end ) == 2)
1642 {
1643 preload_reserve_start = (void *)start;
1644 preload_reserve_end = (void *)end;
1645 /* some apps start inside the DOS area */
1646 if (preload_reserve_start)
1647 address_space_start = min( address_space_start, preload_reserve_start );
1648 }
1649 }
1650
1651 /* try to find space in a reserved area for the views and pages protection table */
1652 #ifdef _WIN64
1653 pages_vprot_size = ((size_t)address_space_limit >> page_shift >> pages_vprot_shift) + 1;
1654 alloc_views.size = view_block_size + pages_vprot_size * sizeof(*pages_vprot);
1655 #else
1656 alloc_views.size = view_block_size + (1U << (32 - page_shift));
1657 #endif
1658 if (wine_mmap_enum_reserved_areas( alloc_virtual_heap, &alloc_views, 1 ))
1659 wine_mmap_remove_reserved_area( alloc_views.base, alloc_views.size, 0 );
1660 else
1661 alloc_views.base = wine_anon_mmap( NULL, alloc_views.size, PROT_READ | PROT_WRITE, 0 );
1662
1663 assert( alloc_views.base != (void *)-1 );
1664 view_block_start = alloc_views.base;
1665 view_block_end = view_block_start + view_block_size / sizeof(*view_block_start);
1666 pages_vprot = (void *)((char *)alloc_views.base + view_block_size);
1667 wine_rb_init( &views_tree, compare_view );
1668
1669 /* make the DOS area accessible (except the low 64K) to hide bugs in broken apps like Excel 2003 */
1670 size = (char *)address_space_start - (char *)0x10000;
1671 if (size && wine_mmap_is_in_reserved_area( (void*)0x10000, size ) == 1)
1672 wine_anon_mmap( (void *)0x10000, size, PROT_READ | PROT_WRITE, MAP_FIXED );
1673 }
1674
1675
1676 /***********************************************************************
1677 * virtual_init_threading
1678 */
1679 void virtual_init_threading(void)
1680 {
1681 use_locks = TRUE;
1682 }
1683
1684
1685 /***********************************************************************
1686 * virtual_get_system_info
1687 */
1688 void virtual_get_system_info( SYSTEM_BASIC_INFORMATION *info )
1689 {
1690 #ifdef HAVE_SYSINFO
1691 struct sysinfo sinfo;
1692 #endif
1693
1694 info->unknown = 0;
1695 info->KeMaximumIncrement = 0; /* FIXME */
1696 info->PageSize = page_size;
1697 info->MmLowestPhysicalPage = 1;
1698 info->MmHighestPhysicalPage = 0x7fffffff / page_size;
1699 #ifdef HAVE_SYSINFO
1700 if (!sysinfo(&sinfo))
1701 {
1702 ULONG64 total = (ULONG64)sinfo.totalram * sinfo.mem_unit;
1703 info->MmHighestPhysicalPage = max(1, total / page_size);
1704 }
1705 #endif
1706 info->MmNumberOfPhysicalPages = info->MmHighestPhysicalPage - info->MmLowestPhysicalPage;
1707 info->AllocationGranularity = get_mask(0) + 1;
1708 info->LowestUserAddress = (void *)0x10000;
1709 info->HighestUserAddress = (char *)user_space_limit - 1;
1710 info->ActiveProcessorsAffinityMask = get_system_affinity_mask();
1711 info->NumberOfProcessors = NtCurrentTeb()->Peb->NumberOfProcessors;
1712 }
1713
1714
1715 /***********************************************************************
1716 * virtual_create_builtin_view
1717 */
1718 NTSTATUS virtual_create_builtin_view( void *module )
1719 {
1720 NTSTATUS status;
1721 sigset_t sigset;
1722 IMAGE_NT_HEADERS *nt = RtlImageNtHeader( module );
1723 SIZE_T size = nt->OptionalHeader.SizeOfImage;
1724 IMAGE_SECTION_HEADER *sec;
1725 struct file_view *view;
1726 void *base;
1727 int i;
1728
1729 size = ROUND_SIZE( module, size );
1730 base = ROUND_ADDR( module, page_mask );
1731 server_enter_uninterrupted_section( &csVirtual, &sigset );
1732 status = create_view( &view, base, size, SEC_IMAGE | SEC_FILE | VPROT_SYSTEM |
1733 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
1734 if (!status)
1735 {
1736 TRACE( "created %p-%p\n", base, (char *)base + size );
1737
1738 /* The PE header is always read-only, no write, no execute. */
1739 set_page_vprot( base, page_size, VPROT_COMMITTED | VPROT_READ );
1740
1741 sec = (IMAGE_SECTION_HEADER *)((char *)&nt->OptionalHeader + nt->FileHeader.SizeOfOptionalHeader);
1742 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
1743 {
1744 BYTE flags = VPROT_COMMITTED;
1745
1746 if (sec[i].Characteristics & IMAGE_SCN_MEM_EXECUTE) flags |= VPROT_EXEC;
1747 if (sec[i].Characteristics & IMAGE_SCN_MEM_READ) flags |= VPROT_READ;
1748 if (sec[i].Characteristics & IMAGE_SCN_MEM_WRITE) flags |= VPROT_WRITE;
1749 set_page_vprot( (char *)base + sec[i].VirtualAddress, sec[i].Misc.VirtualSize, flags );
1750 }
1751 VIRTUAL_DEBUG_DUMP_VIEW( view );
1752 }
1753 server_leave_uninterrupted_section( &csVirtual, &sigset );
1754 return status;
1755 }
1756
1757
1758 /***********************************************************************
1759 * virtual_alloc_thread_stack
1760 */
1761 NTSTATUS virtual_alloc_thread_stack( TEB *teb, SIZE_T reserve_size, SIZE_T commit_size )
1762 {
1763 struct file_view *view;
1764 NTSTATUS status;
1765 sigset_t sigset;
1766 SIZE_T size;
1767
1768 if (!reserve_size || !commit_size)
1769 {
1770 IMAGE_NT_HEADERS *nt = RtlImageNtHeader( NtCurrentTeb()->Peb->ImageBaseAddress );
1771 if (!reserve_size) reserve_size = nt->OptionalHeader.SizeOfStackReserve;
1772 if (!commit_size) commit_size = nt->OptionalHeader.SizeOfStackCommit;
1773 }
1774
1775 size = max( reserve_size, commit_size );
1776 if (size < 1024 * 1024) size = 1024 * 1024; /* Xlib needs a large stack */
1777 size = (size + 0xffff) & ~0xffff; /* round to 64K boundary */
1778
1779 server_enter_uninterrupted_section( &csVirtual, &sigset );
1780
1781 if ((status = map_view( &view, NULL, size, 0xffff, 0,
1782 VPROT_READ | VPROT_WRITE | VPROT_COMMITTED )) != STATUS_SUCCESS)
1783 goto done;
1784
1785 #ifdef VALGRIND_STACK_REGISTER
1786 VALGRIND_STACK_REGISTER( view->base, (char *)view->base + view->size );
1787 #endif
1788
1789 /* setup no access guard page */
1790 set_page_vprot( view->base, page_size, VPROT_COMMITTED );
1791 set_page_vprot( (char *)view->base + page_size, page_size,
1792 VPROT_READ | VPROT_WRITE | VPROT_COMMITTED | VPROT_GUARD );
1793 mprotect_range( view->base, 2 * page_size, 0, 0 );
1794 VIRTUAL_DEBUG_DUMP_VIEW( view );
1795
1796 /* note: limit is lower than base since the stack grows down */
1797 teb->DeallocationStack = view->base;
1798 teb->Tib.StackBase = (char *)view->base + view->size;
1799 teb->Tib.StackLimit = (char *)view->base + 2 * page_size;
1800 done:
1801 server_leave_uninterrupted_section( &csVirtual, &sigset );
1802 return status;
1803 }
1804
1805
1806 /***********************************************************************
1807 * virtual_clear_thread_stack
1808 *
1809 * Clear the stack contents before calling the main entry point, some broken apps need that.
1810 */
1811 void virtual_clear_thread_stack(void)
1812 {
1813 void *stack = NtCurrentTeb()->Tib.StackLimit;
1814 size_t size = (char *)NtCurrentTeb()->Tib.StackBase - (char *)NtCurrentTeb()->Tib.StackLimit;
1815
1816 wine_anon_mmap( stack, size - page_size, PROT_READ | PROT_WRITE, MAP_FIXED );
1817 if (force_exec_prot) mprotect( stack, size - page_size, PROT_READ | PROT_WRITE | PROT_EXEC );
1818 }
1819
1820
1821 /***********************************************************************
1822 * virtual_handle_fault
1823 */
1824 NTSTATUS virtual_handle_fault( LPCVOID addr, DWORD err, BOOL on_signal_stack )
1825 {
1826 NTSTATUS ret = STATUS_ACCESS_VIOLATION;
1827 void *page = ROUND_ADDR( addr, page_mask );
1828 sigset_t sigset;
1829 BYTE vprot;
1830
1831 server_enter_uninterrupted_section( &csVirtual, &sigset );
1832 vprot = get_page_vprot( page );
1833 if (!on_signal_stack && (vprot & VPROT_GUARD))
1834 {
1835 set_page_vprot_bits( page, page_size, 0, VPROT_GUARD );
1836 mprotect_range( page, page_size, 0, 0 );
1837 ret = STATUS_GUARD_PAGE_VIOLATION;
1838 }
1839 else if (err & EXCEPTION_WRITE_FAULT)
1840 {
1841 if (vprot & VPROT_WRITEWATCH)
1842 {
1843 set_page_vprot_bits( page, page_size, 0, VPROT_WRITEWATCH );
1844 mprotect_range( page, page_size, 0, 0 );
1845 }
1846 /* ignore fault if page is writable now */
1847 if (VIRTUAL_GetUnixProt( get_page_vprot( page )) & PROT_WRITE)
1848 {
1849 if ((vprot & VPROT_WRITEWATCH) || is_write_watch_range( page, page_size ))
1850 ret = STATUS_SUCCESS;
1851 }
1852 }
1853 server_leave_uninterrupted_section( &csVirtual, &sigset );
1854 return ret;
1855 }
1856
1857
1858 /***********************************************************************
1859 * check_write_access
1860 *
1861 * Check if the memory range is writable, temporarily disabling write watches if necessary.
1862 */
1863 static NTSTATUS check_write_access( void *base, size_t size, BOOL *has_write_watch )
1864 {
1865 size_t i;
1866 char *addr = ROUND_ADDR( base, page_mask );
1867
1868 size = ROUND_SIZE( base, size );
1869 for (i = 0; i < size; i += page_size)
1870 {
1871 BYTE vprot = get_page_vprot( addr + i );
1872 if (vprot & VPROT_WRITEWATCH) *has_write_watch = TRUE;
1873 if (!(VIRTUAL_GetUnixProt( vprot & ~VPROT_WRITEWATCH ) & PROT_WRITE))
1874 return STATUS_INVALID_USER_BUFFER;
1875 }
1876 if (*has_write_watch)
1877 mprotect_range( addr, size, 0, VPROT_WRITEWATCH ); /* temporarily enable write access */
1878 return STATUS_SUCCESS;
1879 }
1880
1881
1882 /***********************************************************************
1883 * virtual_locked_server_call
1884 */
1885 unsigned int virtual_locked_server_call( void *req_ptr )
1886 {
1887 struct __server_request_info * const req = req_ptr;
1888 sigset_t sigset;
1889 void *addr = req->reply_data;
1890 data_size_t size = req->u.req.request_header.reply_size;
1891 BOOL has_write_watch = FALSE;
1892 unsigned int ret = STATUS_ACCESS_VIOLATION;
1893
1894 if (!size) return wine_server_call( req_ptr );
1895
1896 server_enter_uninterrupted_section( &csVirtual, &sigset );
1897 if (!(ret = check_write_access( addr, size, &has_write_watch )))
1898 {
1899 ret = server_call_unlocked( req );
1900 if (has_write_watch) update_write_watches( addr, size, wine_server_reply_size( req ));
1901 }
1902 server_leave_uninterrupted_section( &csVirtual, &sigset );
1903 return ret;
1904 }
1905
1906
1907 /***********************************************************************
1908 * virtual_locked_read
1909 */
1910 ssize_t virtual_locked_read( int fd, void *addr, size_t size )
1911 {
1912 sigset_t sigset;
1913 BOOL has_write_watch = FALSE;
1914 int err = EFAULT;
1915
1916 ssize_t ret = read( fd, addr, size );
1917 if (ret != -1 || errno != EFAULT) return ret;
1918
1919 server_enter_uninterrupted_section( &csVirtual, &sigset );
1920 if (!check_write_access( addr, size, &has_write_watch ))
1921 {
1922 ret = read( fd, addr, size );
1923 err = errno;
1924 if (has_write_watch) update_write_watches( addr, size, max( 0, ret ));
1925 }
1926 server_leave_uninterrupted_section( &csVirtual, &sigset );
1927 errno = err;
1928 return ret;
1929 }
1930
1931
1932 /***********************************************************************
1933 * virtual_locked_pread
1934 */
1935 ssize_t virtual_locked_pread( int fd, void *addr, size_t size, off_t offset )
1936 {
1937 sigset_t sigset;
1938 BOOL has_write_watch = FALSE;
1939 int err = EFAULT;
1940
1941 ssize_t ret = pread( fd, addr, size, offset );
1942 if (ret != -1 || errno != EFAULT) return ret;
1943
1944 server_enter_uninterrupted_section( &csVirtual, &sigset );
1945 if (!check_write_access( addr, size, &has_write_watch ))
1946 {
1947 ret = pread( fd, addr, size, offset );
1948 err = errno;
1949 if (has_write_watch) update_write_watches( addr, size, max( 0, ret ));
1950 }
1951 server_leave_uninterrupted_section( &csVirtual, &sigset );
1952 errno = err;
1953 return ret;
1954 }
1955
1956
1957 /***********************************************************************
1958 * __wine_locked_recvmsg
1959 */
1960 ssize_t CDECL __wine_locked_recvmsg( int fd, struct msghdr *hdr, int flags )
1961 {
1962 sigset_t sigset;
1963 size_t i;
1964 BOOL has_write_watch = FALSE;
1965 int err = EFAULT;
1966
1967 ssize_t ret = recvmsg( fd, hdr, flags );
1968 if (ret != -1 || errno != EFAULT) return ret;
1969
1970 server_enter_uninterrupted_section( &csVirtual, &sigset );
1971 for (i = 0; i < hdr->msg_iovlen; i++)
1972 if (check_write_access( hdr->msg_iov[i].iov_base, hdr->msg_iov[i].iov_len, &has_write_watch ))
1973 break;
1974 if (i == hdr->msg_iovlen)
1975 {
1976 ret = recvmsg( fd, hdr, flags );
1977 err = errno;
1978 }
1979 if (has_write_watch)
1980 while (i--) update_write_watches( hdr->msg_iov[i].iov_base, hdr->msg_iov[i].iov_len, 0 );
1981
1982 server_leave_uninterrupted_section( &csVirtual, &sigset );
1983 errno = err;
1984 return ret;
1985 }
1986
1987
1988 /***********************************************************************
1989 * virtual_is_valid_code_address
1990 */
1991 BOOL virtual_is_valid_code_address( const void *addr, SIZE_T size )
1992 {
1993 struct file_view *view;
1994 BOOL ret = FALSE;
1995 sigset_t sigset;
1996
1997 server_enter_uninterrupted_section( &csVirtual, &sigset );
1998 if ((view = VIRTUAL_FindView( addr, size )))
1999 ret = !(view->protect & VPROT_SYSTEM); /* system views are not visible to the app */
2000 server_leave_uninterrupted_section( &csVirtual, &sigset );
2001 return ret;
2002 }
2003
2004
2005 /***********************************************************************
2006 * virtual_handle_stack_fault
2007 *
2008 * Handle an access fault inside the current thread stack.
2009 * Called from inside a signal handler.
2010 */
2011 BOOL virtual_handle_stack_fault( void *addr )
2012 {
2013 BOOL ret = FALSE;
2014
2015 RtlEnterCriticalSection( &csVirtual ); /* no need for signal masking inside signal handler */
2016 if (get_page_vprot( addr ) & VPROT_GUARD)
2017 {
2018 char *page = ROUND_ADDR( addr, page_mask );
2019 set_page_vprot_bits( page, page_size, 0, VPROT_GUARD );
2020 mprotect_range( page, page_size, 0, 0 );
2021 NtCurrentTeb()->Tib.StackLimit = page;
2022 if (page >= (char *)NtCurrentTeb()->DeallocationStack + 2*page_size)
2023 {
2024 page -= page_size;
2025 set_page_vprot_bits( page, page_size, VPROT_COMMITTED | VPROT_GUARD, 0 );
2026 mprotect_range( page, page_size, 0, 0 );
2027 }
2028 ret = TRUE;
2029 }
2030 RtlLeaveCriticalSection( &csVirtual );
2031 return ret;
2032 }
2033
2034
2035 /***********************************************************************
2036 * virtual_check_buffer_for_read
2037 *
2038 * Check if a memory buffer can be read, triggering page faults if needed for DIB section access.
2039 */
2040 BOOL virtual_check_buffer_for_read( const void *ptr, SIZE_T size )
2041 {
2042 if (!size) return TRUE;
2043 if (!ptr) return FALSE;
2044
2045 __TRY
2046 {
2047 volatile const char *p = ptr;
2048 char dummy __attribute__((unused));
2049 SIZE_T count = size;
2050
2051 while (count > page_size)
2052 {
2053 dummy = *p;
2054 p += page_size;
2055 count -= page_size;
2056 }
2057 dummy = p[0];
2058 dummy = p[count - 1];
2059 }
2060 __EXCEPT_PAGE_FAULT
2061 {
2062 return FALSE;
2063 }
2064 __ENDTRY
2065 return TRUE;
2066 }
2067
2068
2069 /***********************************************************************
2070 * virtual_check_buffer_for_write
2071 *
2072 * Check if a memory buffer can be written to, triggering page faults if needed for write watches.
2073 */
2074 BOOL virtual_check_buffer_for_write( void *ptr, SIZE_T size )
2075 {
2076 if (!size) return TRUE;
2077 if (!ptr) return FALSE;
2078
2079 __TRY
2080 {
2081 volatile char *p = ptr;
2082 SIZE_T count = size;
2083
2084 while (count > page_size)
2085 {
2086 *p |= 0;
2087 p += page_size;
2088 count -= page_size;
2089 }
2090 p[0] |= 0;
2091 p[count - 1] |= 0;
2092 }
2093 __EXCEPT_PAGE_FAULT
2094 {
2095 return FALSE;
2096 }
2097 __ENDTRY
2098 return TRUE;
2099 }
2100
2101
2102 /***********************************************************************
2103 * virtual_uninterrupted_read_memory
2104 *
2105 * Similar to NtReadVirtualMemory, but without wineserver calls. Moreover
2106 * permissions are checked before accessing each page, to ensure that no
2107 * exceptions can happen.
2108 */
2109 SIZE_T virtual_uninterrupted_read_memory( const void *addr, void *buffer, SIZE_T size )
2110 {
2111 struct file_view *view;
2112 sigset_t sigset;
2113 SIZE_T bytes_read = 0;
2114
2115 if (!size) return 0;
2116
2117 server_enter_uninterrupted_section( &csVirtual, &sigset );
2118 if ((view = VIRTUAL_FindView( addr, size )))
2119 {
2120 if (!(view->protect & VPROT_SYSTEM))
2121 {
2122 char *page = ROUND_ADDR( addr, page_mask );
2123
2124 while (bytes_read < size && (VIRTUAL_GetUnixProt( get_page_vprot( page )) & PROT_READ))
2125 {
2126 SIZE_T block_size = min( size, page_size - ((UINT_PTR)addr & page_mask) );
2127 memcpy( buffer, addr, block_size );
2128
2129 addr = (const void *)((const char *)addr + block_size);
2130 buffer = (void *)((char *)buffer + block_size);
2131 bytes_read += block_size;
2132 page += page_size;
2133 }
2134 }
2135 }
2136 server_leave_uninterrupted_section( &csVirtual, &sigset );
2137 return bytes_read;
2138 }
2139
2140
2141 /***********************************************************************
2142 * virtual_uninterrupted_write_memory
2143 *
2144 * Similar to NtWriteVirtualMemory, but without wineserver calls. Moreover
2145 * permissions are checked before accessing each page, to ensure that no
2146 * exceptions can happen.
2147 */
2148 NTSTATUS virtual_uninterrupted_write_memory( void *addr, const void *buffer, SIZE_T size )
2149 {
2150 BOOL has_write_watch = FALSE;
2151 sigset_t sigset;
2152 NTSTATUS ret;
2153
2154 if (!size) return STATUS_SUCCESS;
2155
2156 server_enter_uninterrupted_section( &csVirtual, &sigset );
2157 if (!(ret = check_write_access( addr, size, &has_write_watch )))
2158 {
2159 memcpy( addr, buffer, size );
2160 if (has_write_watch) update_write_watches( addr, size, size );
2161 }
2162 server_leave_uninterrupted_section( &csVirtual, &sigset );
2163 return ret;
2164 }
2165
2166
2167 /***********************************************************************
2168 * VIRTUAL_SetForceExec
2169 *
2170 * Whether to force exec prot on all views.
2171 */
2172 void VIRTUAL_SetForceExec( BOOL enable )
2173 {
2174 struct file_view *view;
2175 sigset_t sigset;
2176
2177 server_enter_uninterrupted_section( &csVirtual, &sigset );
2178 if (!force_exec_prot != !enable) /* change all existing views */
2179 {
2180 force_exec_prot = enable;
2181
2182 WINE_RB_FOR_EACH_ENTRY( view, &views_tree, struct file_view, entry )
2183 {
2184 /* file mappings are always accessible */
2185 BYTE commit = is_view_valloc( view ) ? 0 : VPROT_COMMITTED;
2186
2187 mprotect_range( view->base, view->size, commit, 0 );
2188 }
2189 }
2190 server_leave_uninterrupted_section( &csVirtual, &sigset );
2191 }
2192
2193 struct free_range
2194 {
2195 char *base;
2196 char *limit;
2197 };
2198
2199 /* free reserved areas above the limit; callback for wine_mmap_enum_reserved_areas */
2200 static int free_reserved_memory( void *base, size_t size, void *arg )
2201 {
2202 struct free_range *range = arg;
2203
2204 if ((char *)base >= range->limit) return 0;
2205 if ((char *)base + size <= range->base) return 0;
2206 if ((char *)base < range->base)
2207 {
2208 size -= range->base - (char *)base;
2209 base = range->base;
2210 }
2211 if ((char *)base + size > range->limit) size = range->limit - (char *)base;
2212 remove_reserved_area( base, size );
2213 return 1; /* stop enumeration since the list has changed */
2214 }
2215
2216 /***********************************************************************
2217 * virtual_release_address_space
2218 *
2219 * Release some address space once we have loaded and initialized the app.
2220 */
2221 void virtual_release_address_space(void)
2222 {
2223 struct free_range range;
2224 sigset_t sigset;
2225
2226 if (is_win64) return;
2227
2228 server_enter_uninterrupted_section( &csVirtual, &sigset );
2229
2230 range.base = (char *)0x82000000;
2231 range.limit = user_space_limit;
2232
2233 if (range.limit > range.base)
2234 {
2235 while (wine_mmap_enum_reserved_areas( free_reserved_memory, &range, 1 )) /* nothing */;
2236 }
2237 else
2238 {
2239 #ifndef __APPLE__ /* dyld doesn't support parts of the WINE_DOS segment being unmapped */
2240 range.base = (char *)0x20000000;
2241 range.limit = (char *)0x7f000000;
2242 while (wine_mmap_enum_reserved_areas( free_reserved_memory, &range, 0 )) /* nothing */;
2243 #endif
2244 }
2245
2246 server_leave_uninterrupted_section( &csVirtual, &sigset );
2247 }
2248
2249
2250 /***********************************************************************
2251 * virtual_set_large_address_space
2252 *
2253 * Enable use of a large address space when allowed by the application.
2254 */
2255 void virtual_set_large_address_space(void)
2256 {
2257 IMAGE_NT_HEADERS *nt = RtlImageNtHeader( NtCurrentTeb()->Peb->ImageBaseAddress );
2258
2259 if (!(nt->FileHeader.Characteristics & IMAGE_FILE_LARGE_ADDRESS_AWARE)) return;
2260 /* no large address space on win9x */
2261 if (NtCurrentTeb()->Peb->OSPlatformId != VER_PLATFORM_WIN32_NT) return;
2262
2263 user_space_limit = working_set_limit = address_space_limit;
2264 }
2265
2266
2267 /***********************************************************************
2268 * NtAllocateVirtualMemory (NTDLL.@)
2269 * ZwAllocateVirtualMemory (NTDLL.@)
2270 */
2271 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
2272 SIZE_T *size_ptr, ULONG type, ULONG protect )
2273 {
2274 void *base;
2275 unsigned int vprot;
2276 SIZE_T size = *size_ptr;
2277 SIZE_T mask = get_mask( zero_bits );
2278 NTSTATUS status = STATUS_SUCCESS;
2279 BOOL is_dos_memory = FALSE;
2280 struct file_view *view;
2281 sigset_t sigset;
2282
2283 TRACE("%p %p %08lx %x %08x\n", process, *ret, size, type, protect );
2284
2285 if (!size) return STATUS_INVALID_PARAMETER;
2286 if (!mask) return STATUS_INVALID_PARAMETER_3;
2287
2288 if (process != NtCurrentProcess())
2289 {
2290 apc_call_t call;
2291 apc_result_t result;
2292
2293 memset( &call, 0, sizeof(call) );
2294
2295 call.virtual_alloc.type = APC_VIRTUAL_ALLOC;
2296 call.virtual_alloc.addr = wine_server_client_ptr( *ret );
2297 call.virtual_alloc.size = *size_ptr;
2298 call.virtual_alloc.zero_bits = zero_bits;
2299 call.virtual_alloc.op_type = type;
2300 call.virtual_alloc.prot = protect;
2301 status = server_queue_process_apc( process, &call, &result );
2302 if (status != STATUS_SUCCESS) return status;
2303
2304 if (result.virtual_alloc.status == STATUS_SUCCESS)
2305 {
2306 *ret = wine_server_get_ptr( result.virtual_alloc.addr );
2307 *size_ptr = result.virtual_alloc.size;
2308 }
2309 return result.virtual_alloc.status;
2310 }
2311
2312 /* Round parameters to a page boundary */
2313
2314 if (is_beyond_limit( 0, size, working_set_limit )) return STATUS_WORKING_SET_LIMIT_RANGE;
2315
2316 if (*ret)
2317 {
2318 if (type & MEM_RESERVE) /* Round down to 64k boundary */
2319 base = ROUND_ADDR( *ret, mask );
2320 else
2321 base = ROUND_ADDR( *ret, page_mask );
2322 size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
2323
2324 /* disallow low 64k, wrap-around and kernel space */
2325 if (((char *)base < (char *)0x10000) ||
2326 ((char *)base + size < (char *)base) ||
2327 is_beyond_limit( base, size, address_space_limit ))
2328 {
2329 /* address 1 is magic to mean DOS area */
2330 if (!base && *ret == (void *)1 && size == 0x110000) is_dos_memory = TRUE;
2331 else return STATUS_INVALID_PARAMETER;
2332 }
2333 }
2334 else
2335 {
2336 base = NULL;
2337 size = (size + page_mask) & ~page_mask;
2338 }
2339
2340 /* Compute the alloc type flags */
2341
2342 if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_RESET)) ||
2343 (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_TOP_DOWN | MEM_WRITE_WATCH | MEM_RESET)))
2344 {
2345 WARN("called with wrong alloc type flags (%08x) !\n", type);
2346 return STATUS_INVALID_PARAMETER;
2347 }
2348
2349 /* Reserve the memory */
2350
2351 if (use_locks) server_enter_uninterrupted_section( &csVirtual, &sigset );
2352
2353 if ((type & MEM_RESERVE) || !base)
2354 {
2355 if (!(status = get_vprot_flags( protect, &vprot, FALSE )))
2356 {
2357 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
2358 if (type & MEM_WRITE_WATCH) vprot |= VPROT_WRITEWATCH;
2359 if (protect & PAGE_NOCACHE) vprot |= SEC_NOCACHE;
2360
2361 if (vprot & VPROT_WRITECOPY) status = STATUS_INVALID_PAGE_PROTECTION;
2362 else if (is_dos_memory) status = allocate_dos_memory( &view, vprot );
2363 else status = map_view( &view, base, size, mask, type & MEM_TOP_DOWN, vprot );
2364
2365 if (status == STATUS_SUCCESS) base = view->base;
2366 }
2367 }
2368 else if (type & MEM_RESET)
2369 {
2370 if (!(view = VIRTUAL_FindView( base, size ))) status = STATUS_NOT_MAPPED_VIEW;
2371 else madvise( base, size, MADV_DONTNEED );
2372 }
2373 else /* commit the pages */
2374 {
2375 if (!(view = VIRTUAL_FindView( base, size ))) status = STATUS_NOT_MAPPED_VIEW;
2376 else if (view->protect & SEC_FILE) status = STATUS_ALREADY_COMMITTED;
2377 else if (!(status = set_protection( view, base, size, protect )) && (view->protect & SEC_RESERVE))
2378 {
2379 SERVER_START_REQ( add_mapping_committed_range )
2380 {
2381 req->base = wine_server_client_ptr( view->base );
2382 req->offset = (char *)base - (char *)view->base;
2383 req->size = size;
2384 wine_server_call( req );
2385 }
2386 SERVER_END_REQ;
2387 }
2388 }
2389
2390 if (!status) VIRTUAL_DEBUG_DUMP_VIEW( view );
2391
2392 if (use_locks) server_leave_uninterrupted_section( &csVirtual, &sigset );
2393
2394 if (status == STATUS_SUCCESS)
2395 {
2396 *ret = base;
2397 *size_ptr = size;
2398 }
2399 return status;
2400 }
2401
2402
2403 /***********************************************************************
2404 * NtFreeVirtualMemory (NTDLL.@)
2405 * ZwFreeVirtualMemory (NTDLL.@)
2406 */
2407 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr, ULONG type )
2408 {
2409 struct file_view *view;
2410 char *base;
2411 sigset_t sigset;
2412 NTSTATUS status = STATUS_SUCCESS;
2413 LPVOID addr = *addr_ptr;
2414 SIZE_T size = *size_ptr;
2415
2416 TRACE("%p %p %08lx %x\n", process, addr, size, type );
2417
2418 if (process != NtCurrentProcess())
2419 {
2420 apc_call_t call;
2421 apc_result_t result;
2422
2423 memset( &call, 0, sizeof(call) );
2424
2425 call.virtual_free.type = APC_VIRTUAL_FREE;
2426 call.virtual_free.addr = wine_server_client_ptr( addr );
2427 call.virtual_free.size = size;
2428 call.virtual_free.op_type = type;
2429 status = server_queue_process_apc( process, &call, &result );
2430 if (status != STATUS_SUCCESS) return status;
2431
2432 if (result.virtual_free.status == STATUS_SUCCESS)
2433 {
2434 *addr_ptr = wine_server_get_ptr( result.virtual_free.addr );
2435 *size_ptr = result.virtual_free.size;
2436 }
2437 return result.virtual_free.status;
2438 }
2439
2440 /* Fix the parameters */
2441
2442 size = ROUND_SIZE( addr, size );
2443 base = ROUND_ADDR( addr, page_mask );
2444
2445 /* avoid freeing the DOS area when a broken app passes a NULL pointer */
2446 if (!base) return STATUS_INVALID_PARAMETER;
2447
2448 server_enter_uninterrupted_section( &csVirtual, &sigset );
2449
2450 if (!(view = VIRTUAL_FindView( base, size )) || !is_view_valloc( view ))
2451 {
2452 status = STATUS_INVALID_PARAMETER;
2453 }
2454 else if (type == MEM_RELEASE)
2455 {
2456 /* Free the pages */
2457
2458 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
2459 else
2460 {
2461 delete_view( view );
2462 *addr_ptr = base;
2463 *size_ptr = size;
2464 }
2465 }
2466 else if (type == MEM_DECOMMIT)
2467 {
2468 status = decommit_pages( view, base - (char *)view->base, size );
2469 if (status == STATUS_SUCCESS)
2470 {
2471 *addr_ptr = base;
2472 *size_ptr = size;
2473 }
2474 }
2475 else
2476 {
2477 WARN("called with wrong free type flags (%08x) !\n", type);
2478 status = STATUS_INVALID_PARAMETER;
2479 }
2480
2481 server_leave_uninterrupted_section( &csVirtual, &sigset );
2482 return status;
2483 }
2484
2485
2486 /***********************************************************************
2487 * NtProtectVirtualMemory (NTDLL.@)
2488 * ZwProtectVirtualMemory (NTDLL.@)
2489 */
2490 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr,
2491 ULONG new_prot, ULONG *old_prot )
2492 {
2493 struct file_view *view;
2494 sigset_t sigset;
2495 NTSTATUS status = STATUS_SUCCESS;
2496 char *base;
2497 BYTE vprot;
2498 SIZE_T size = *size_ptr;
2499 LPVOID addr = *addr_ptr;
2500 DWORD old;
2501
2502 TRACE("%p %p %08lx %08x\n", process, addr, size, new_prot );
2503
2504 if (!old_prot)
2505 return STATUS_ACCESS_VIOLATION;
2506
2507 if (process != NtCurrentProcess())
2508 {
2509 apc_call_t call;
2510 apc_result_t result;
2511
2512 memset( &call, 0, sizeof(call) );
2513
2514 call.virtual_protect.type = APC_VIRTUAL_PROTECT;
2515 call.virtual_protect.addr = wine_server_client_ptr( addr );
2516 call.virtual_protect.size = size;
2517 call.virtual_protect.prot = new_prot;
2518 status = server_queue_process_apc( process, &call, &result );
2519 if (status != STATUS_SUCCESS) return status;
2520
2521 if (result.virtual_protect.status == STATUS_SUCCESS)
2522 {
2523 *addr_ptr = wine_server_get_ptr( result.virtual_protect.addr );
2524 *size_ptr = result.virtual_protect.size;
2525 if (old_prot) *old_prot = result.virtual_protect.prot;
2526 }
2527 return result.virtual_protect.status;
2528 }
2529
2530 /* Fix the parameters */
2531
2532 size = ROUND_SIZE( addr, size );
2533 base = ROUND_ADDR( addr, page_mask );
2534
2535 server_enter_uninterrupted_section( &csVirtual, &sigset );
2536
2537 if ((view = VIRTUAL_FindView( base, size )))
2538 {
2539 /* Make sure all the pages are committed */
2540 if (get_committed_size( view, base, &vprot ) >= size && (vprot & VPROT_COMMITTED))
2541 {
2542 old = VIRTUAL_GetWin32Prot( vprot, view->protect );
2543 status = set_protection( view, base, size, new_prot );
2544 }
2545 else status = STATUS_NOT_COMMITTED;
2546 }
2547 else status = STATUS_INVALID_PARAMETER;
2548
2549 if (!status) VIRTUAL_DEBUG_DUMP_VIEW( view );
2550
2551 server_leave_uninterrupted_section( &csVirtual, &sigset );
2552
2553 if (status == STATUS_SUCCESS)
2554 {
2555 *addr_ptr = base;
2556 *size_ptr = size;
2557 *old_prot = old;
2558 }
2559 return status;
2560 }
2561
2562
2563 /* retrieve state for a free memory area; callback for wine_mmap_enum_reserved_areas */
2564 static int get_free_mem_state_callback( void *start, size_t size, void *arg )
2565 {
2566 MEMORY_BASIC_INFORMATION *info = arg;
2567 void *end = (char *)start + size;
2568
2569 if ((char *)info->BaseAddress + info->RegionSize < (char *)start) return 0;
2570
2571 if (info->BaseAddress >= end)
2572 {
2573 if (info->AllocationBase < end) info->AllocationBase = end;
2574 return 0;
2575 }
2576
2577 if (info->BaseAddress >= start || start <= address_space_start)
2578 {
2579 /* it's a real free area */
2580 info->State = MEM_FREE;
2581 info->Protect = PAGE_NOACCESS;
2582 info->AllocationBase = 0;
2583 info->AllocationProtect = 0;
2584 info->Type = 0;
2585 if ((char *)info->BaseAddress + info->RegionSize > (char *)end)
2586 info->RegionSize = (char *)end - (char *)info->BaseAddress;
2587 }
2588 else /* outside of the reserved area, pretend it's allocated */
2589 {
2590 info->RegionSize = (char *)start - (char *)info->BaseAddress;
2591 info->State = MEM_RESERVE;
2592 info->Protect = PAGE_NOACCESS;
2593 info->AllocationProtect = PAGE_NOACCESS;
2594 info->Type = MEM_PRIVATE;
2595 }
2596 return 1;
2597 }
2598
2599 #define UNIMPLEMENTED_INFO_CLASS(c) \
2600 case c: \
2601 FIXME("(process=%p,addr=%p) Unimplemented information class: " #c "\n", process, addr); \
2602 return STATUS_INVALID_INFO_CLASS
2603
2604 /***********************************************************************
2605 * NtQueryVirtualMemory (NTDLL.@)
2606 * ZwQueryVirtualMemory (NTDLL.@)
2607 */
2608 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
2609 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
2610 SIZE_T len, SIZE_T *res_len )
2611 {
2612 struct file_view *view;
2613 char *base, *alloc_base = 0, *alloc_end = working_set_limit;
2614 struct wine_rb_entry *ptr;
2615 MEMORY_BASIC_INFORMATION *info = buffer;
2616 sigset_t sigset;
2617
2618 if (info_class != MemoryBasicInformation)
2619 {
2620 switch(info_class)
2621 {
2622 UNIMPLEMENTED_INFO_CLASS(MemoryWorkingSetList);
2623 UNIMPLEMENTED_INFO_CLASS(MemorySectionName);
2624 UNIMPLEMENTED_INFO_CLASS(MemoryBasicVlmInformation);
2625
2626 default:
2627 FIXME("(%p,%p,info_class=%d,%p,%ld,%p) Unknown information class\n",
2628 process, addr, info_class, buffer, len, res_len);
2629 return STATUS_INVALID_INFO_CLASS;
2630 }
2631 }
2632
2633 if (process != NtCurrentProcess())
2634 {
2635 NTSTATUS status;
2636 apc_call_t call;
2637 apc_result_t result;
2638
2639 memset( &call, 0, sizeof(call) );
2640
2641 call.virtual_query.type = APC_VIRTUAL_QUERY;
2642 call.virtual_query.addr = wine_server_client_ptr( addr );
2643 status = server_queue_process_apc( process, &call, &result );
2644 if (status != STATUS_SUCCESS) return status;
2645
2646 if (result.virtual_query.status == STATUS_SUCCESS)
2647 {
2648 info->BaseAddress = wine_server_get_ptr( result.virtual_query.base );
2649 info->AllocationBase = wine_server_get_ptr( result.virtual_query.alloc_base );
2650 info->RegionSize = result.virtual_query.size;
2651 info->Protect = result.virtual_query.prot;
2652 info->AllocationProtect = result.virtual_query.alloc_prot;
2653 info->State = (DWORD)result.virtual_query.state << 12;
2654 info->Type = (DWORD)result.virtual_query.alloc_type << 16;
2655 if (info->RegionSize != result.virtual_query.size) /* truncated */
2656 return STATUS_INVALID_PARAMETER; /* FIXME */
2657 if (res_len) *res_len = sizeof(*info);
2658 }
2659 return result.virtual_query.status;
2660 }
2661
2662 base = ROUND_ADDR( addr, page_mask );
2663
2664 if (is_beyond_limit( base, 1, working_set_limit )) return STATUS_WORKING_SET_LIMIT_RANGE;
2665
2666 /* Find the view containing the address */
2667
2668 server_enter_uninterrupted_section( &csVirtual, &sigset );
2669 ptr = views_tree.root;
2670 while (ptr)
2671 {
2672 view = WINE_RB_ENTRY_VALUE( ptr, struct file_view, entry );
2673 if ((char *)view->base > base)
2674 {
2675 alloc_end = view->base;
2676 ptr = ptr->left;
2677 }
2678 else if ((char *)view->base + view->size <= base)
2679 {
2680 alloc_base = (char *)view->base + view->size;
2681 ptr = ptr->right;
2682 }
2683 else
2684 {
2685 alloc_base = view->base;
2686 alloc_end = (char *)view->base + view->size;
2687 break;
2688 }
2689 }
2690
2691 /* Fill the info structure */
2692
2693 info->AllocationBase = alloc_base;
2694 info->BaseAddress = base;
2695 info->RegionSize = alloc_end - base;
2696
2697 if (!ptr)
2698 {
2699 if (!wine_mmap_enum_reserved_areas( get_free_mem_state_callback, info, 0 ))
2700 {
2701 /* not in a reserved area at all, pretend it's allocated */
2702 #ifdef __i386__
2703 if (base >= (char *)address_space_start)
2704 {
2705 info->State = MEM_RESERVE;
2706 info->Protect = PAGE_NOACCESS;
2707 info->AllocationProtect = PAGE_NOACCESS;
2708 info->Type = MEM_PRIVATE;
2709 }
2710 else
2711 #endif
2712 {
2713 info->State = MEM_FREE;
2714 info->Protect = PAGE_NOACCESS;
2715 info->AllocationBase = 0;
2716 info->AllocationProtect = 0;
2717 info->Type = 0;
2718 }
2719 }
2720 }
2721 else
2722 {
2723 BYTE vprot;
2724 char *ptr;
2725 SIZE_T range_size = get_committed_size( view, base, &vprot );
2726
2727 info->State = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
2728 info->Protect = (vprot & VPROT_COMMITTED) ? VIRTUAL_GetWin32Prot( vprot, view->protect ) : 0;
2729 info->AllocationProtect = VIRTUAL_GetWin32Prot( view->protect, view->protect );
2730 if (view->protect & SEC_IMAGE) info->Type = MEM_IMAGE;
2731 else if (view->protect & (SEC_FILE | SEC_RESERVE | SEC_COMMIT)) info->Type = MEM_MAPPED;
2732 else info->Type = MEM_PRIVATE;
2733 for (ptr = base; ptr < base + range_size; ptr += page_size)
2734 if ((get_page_vprot( ptr ) ^ vprot) & ~VPROT_WRITEWATCH) break;
2735 info->RegionSize = ptr - base;
2736 }
2737 server_leave_uninterrupted_section( &csVirtual, &sigset );
2738
2739 if (res_len) *res_len = sizeof(*info);
2740 return STATUS_SUCCESS;
2741 }
2742
2743
2744 /***********************************************************************
2745 * NtLockVirtualMemory (NTDLL.@)
2746 * ZwLockVirtualMemory (NTDLL.@)
2747 */
2748 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
2749 {
2750 NTSTATUS status = STATUS_SUCCESS;
2751
2752 if (process != NtCurrentProcess())
2753 {
2754 apc_call_t call;
2755 apc_result_t result;
2756
2757 memset( &call, 0, sizeof(call) );
2758
2759 call.virtual_lock.type = APC_VIRTUAL_LOCK;
2760 call.virtual_lock.addr = wine_server_client_ptr( *addr );
2761 call.virtual_lock.size = *size;
2762 status = server_queue_process_apc( process, &call, &result );
2763 if (status != STATUS_SUCCESS) return status;
2764
2765 if (result.virtual_lock.status == STATUS_SUCCESS)
2766 {
2767 *addr = wine_server_get_ptr( result.virtual_lock.addr );
2768 *size = result.virtual_lock.size;
2769 }
2770 return result.virtual_lock.status;
2771 }
2772
2773 *size = ROUND_SIZE( *addr, *size );
2774 *addr = ROUND_ADDR( *addr, page_mask );
2775
2776 if (mlock( *addr, *size )) status = STATUS_ACCESS_DENIED;
2777 return status;
2778 }
2779
2780
2781 /***********************************************************************
2782 * NtUnlockVirtualMemory (NTDLL.@)
2783 * ZwUnlockVirtualMemory (NTDLL.@)
2784 */
2785 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
2786 {
2787 NTSTATUS status = STATUS_SUCCESS;
2788
2789 if (process != NtCurrentProcess())
2790 {
2791 apc_call_t call;
2792 apc_result_t result;
2793
2794 memset( &call, 0, sizeof(call) );
2795
2796 call.virtual_unlock.type = APC_VIRTUAL_UNLOCK;
2797 call.virtual_unlock.addr = wine_server_client_ptr( *addr );
2798 call.virtual_unlock.size = *size;
2799 status = server_queue_process_apc( process, &call, &result );
2800 if (status != STATUS_SUCCESS) return status;
2801
2802 if (result.virtual_unlock.status == STATUS_SUCCESS)
2803 {
2804 *addr = wine_server_get_ptr( result.virtual_unlock.addr );
2805 *size = result.virtual_unlock.size;
2806 }
2807 return result.virtual_unlock.status;
2808 }
2809
2810 *size = ROUND_SIZE( *addr, *size );
2811 *addr = ROUND_ADDR( *addr, page_mask );
2812
2813 if (munlock( *addr, *size )) status = STATUS_ACCESS_DENIED;
2814 return status;
2815 }
2816
2817
2818 /***********************************************************************
2819 * NtCreateSection (NTDLL.@)
2820 * ZwCreateSection (NTDLL.@)
2821 */
2822 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
2823 const LARGE_INTEGER *size, ULONG protect,
2824 ULONG sec_flags, HANDLE file )
2825 {
2826 NTSTATUS ret;
2827 unsigned int vprot, file_access = 0;
2828 data_size_t len;
2829 struct object_attributes *objattr;
2830
2831 if ((ret = get_vprot_flags( protect, &vprot, sec_flags & SEC_IMAGE ))) return ret;
2832 if ((ret = alloc_object_attributes( attr, &objattr, &len ))) return ret;
2833
2834 if (vprot & VPROT_READ) file_access |= FILE_READ_DATA;
2835 if (vprot & VPROT_WRITE) file_access |= FILE_WRITE_DATA;
2836
2837 SERVER_START_REQ( create_mapping )
2838 {
2839 req->access = access;
2840 req->flags = sec_flags;
2841 req->file_handle = wine_server_obj_handle( file );
2842 req->file_access = file_access;
2843 req->size = size ? size->QuadPart : 0;
2844 wine_server_add_data( req, objattr, len );
2845 ret = wine_server_call( req );
2846 *handle = wine_server_ptr_handle( reply->handle );
2847 }
2848 SERVER_END_REQ;
2849
2850 RtlFreeHeap( GetProcessHeap(), 0, objattr );
2851 return ret;
2852 }
2853
2854
2855 /***********************************************************************
2856 * NtOpenSection (NTDLL.@)
2857 * ZwOpenSection (NTDLL.@)
2858 */
2859 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
2860 {
2861 NTSTATUS ret;
2862
2863 if ((ret = validate_open_object_attributes( attr ))) return ret;
2864
2865 SERVER_START_REQ( open_mapping )
2866 {
2867 req->access = access;
2868 req->attributes = attr->Attributes;
2869 req->rootdir = wine_server_obj_handle( attr->RootDirectory );
2870 if (attr->ObjectName)
2871 wine_server_add_data( req, attr->ObjectName->Buffer, attr->ObjectName->Length );
2872 ret = wine_server_call( req );
2873 *handle = wine_server_ptr_handle( reply->handle );
2874 }
2875 SERVER_END_REQ;
2876 return ret;
2877 }
2878
2879
2880 /***********************************************************************
2881 * NtMapViewOfSection (NTDLL.@)
2882 * ZwMapViewOfSection (NTDLL.@)
2883 */
2884 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
2885 SIZE_T commit_size, const LARGE_INTEGER *offset_ptr, SIZE_T *size_ptr,
2886 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
2887 {
2888 NTSTATUS res;
2889 mem_size_t full_size;
2890 ACCESS_MASK access;
2891 SIZE_T size, mask = get_mask( zero_bits );
2892 int unix_handle = -1, needs_close;
2893 unsigned int vprot, sec_flags;
2894 struct file_view *view;
2895 pe_image_info_t image_info;
2896 HANDLE shared_file;
2897 LARGE_INTEGER offset;
2898 sigset_t sigset;
2899
2900 offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
2901
2902 TRACE("handle=%p process=%p addr=%p off=%x%08x size=%lx access=%x\n",
2903 handle, process, *addr_ptr, offset.u.HighPart, offset.u.LowPart, *size_ptr, protect );
2904
2905 /* Check parameters */
2906
2907 if ((*addr_ptr && zero_bits) || !mask)
2908 return STATUS_INVALID_PARAMETER_4;
2909
2910 #ifndef _WIN64
2911 if (!is_wow64 && (alloc_type & AT_ROUND_TO_PAGE))
2912 {
2913 *addr_ptr = ROUND_ADDR( *addr_ptr, page_mask );
2914 mask = page_mask;
2915 }
2916 #endif
2917
2918 if ((offset.u.LowPart & mask) || (*addr_ptr && ((UINT_PTR)*addr_ptr & mask)))
2919 return STATUS_MAPPED_ALIGNMENT;
2920
2921 switch(protect)
2922 {
2923 case PAGE_NOACCESS:
2924 case PAGE_READONLY:
2925 case PAGE_WRITECOPY:
2926 access = SECTION_MAP_READ;
2927 break;
2928 case PAGE_READWRITE:
2929 access = SECTION_MAP_WRITE;
2930 break;
2931 case PAGE_EXECUTE:
2932 case PAGE_EXECUTE_READ:
2933 case PAGE_EXECUTE_WRITECOPY:
2934 access = SECTION_MAP_READ | SECTION_MAP_EXECUTE;
2935 break;
2936 case PAGE_EXECUTE_READWRITE:
2937 access = SECTION_MAP_WRITE | SECTION_MAP_EXECUTE;
2938 break;
2939 default:
2940 return STATUS_INVALID_PAGE_PROTECTION;
2941 }
2942
2943 if (process != NtCurrentProcess())
2944 {
2945 apc_call_t call;
2946 apc_result_t result;
2947
2948 memset( &call, 0, sizeof(call) );
2949
2950 call.map_view.type = APC_MAP_VIEW;
2951 call.map_view.handle = wine_server_obj_handle( handle );
2952 call.map_view.addr = wine_server_client_ptr( *addr_ptr );
2953 call.map_view.size = *size_ptr;
2954 call.map_view.offset = offset.QuadPart;
2955 call.map_view.zero_bits = zero_bits;
2956 call.map_view.alloc_type = alloc_type;
2957 call.map_view.prot = protect;
2958 res = server_queue_process_apc( process, &call, &result );
2959 if (res != STATUS_SUCCESS) return res;
2960
2961 if ((NTSTATUS)result.map_view.status >= 0)
2962 {
2963 *addr_ptr = wine_server_get_ptr( result.map_view.addr );
2964 *size_ptr = result.map_view.size;
2965 }
2966 return result.map_view.status;
2967 }
2968
2969 SERVER_START_REQ( get_mapping_info )
2970 {
2971 req->handle = wine_server_obj_handle( handle );
2972 req->access = access;
2973 wine_server_set_reply( req, &image_info, sizeof(image_info) );
2974 res = wine_server_call( req );
2975 sec_flags = reply->flags;
2976 full_size = reply->size;
2977 shared_file = wine_server_ptr_handle( reply->shared_file );
2978 }
2979 SERVER_END_REQ;
2980 if (res) return res;
2981
2982 if ((res = server_get_unix_fd( handle, 0, &unix_handle, &needs_close, NULL, NULL ))) goto done;
2983
2984 if (sec_flags & SEC_IMAGE)
2985 {
2986 void *base = wine_server_get_ptr( image_info.base );
2987
2988 if ((ULONG_PTR)base != image_info.base) base = NULL;
2989 size = image_info.map_size;
2990 if (size != image_info.map_size) /* truncated */
2991 {
2992 WARN( "Modules larger than 4Gb (%s) not supported\n",
2993 wine_dbgstr_longlong(image_info.map_size) );
2994 res = STATUS_INVALID_PARAMETER;
2995 goto done;
2996 }
2997 if (shared_file)
2998 {
2999 int shared_fd, shared_needs_close;
3000
3001 if ((res = server_get_unix_fd( shared_file, FILE_READ_DATA|FILE_WRITE_DATA,
3002 &shared_fd, &shared_needs_close, NULL, NULL ))) goto done;
3003 res = map_image( handle, access, unix_handle, base, size, mask, image_info.header_size,
3004 shared_fd, needs_close, addr_ptr );
3005 if (shared_needs_close) close( shared_fd );
3006 close_handle( shared_file );
3007 }
3008 else
3009 {
3010 res = map_image( handle, access, unix_handle, base, size, mask, image_info.header_size,
3011 -1, needs_close, addr_ptr );
3012 }
3013 if (needs_close) close( unix_handle );
3014 if (res >= 0) *size_ptr = size;
3015 return res;
3016 }
3017
3018 res = STATUS_INVALID_PARAMETER;
3019 if (offset.QuadPart >= full_size) goto done;
3020 if (*size_ptr)
3021 {
3022 size = *size_ptr;
3023 if (size > full_size - offset.QuadPart)
3024 {
3025 res = STATUS_INVALID_VIEW_SIZE;
3026 goto done;
3027 }
3028 }
3029 else
3030 {
3031 size = full_size - offset.QuadPart;
3032 if (size != full_size - offset.QuadPart) /* truncated */
3033 {
3034 WARN( "Files larger than 4Gb (%s) not supported on this platform\n",
3035 wine_dbgstr_longlong(full_size) );
3036 goto done;
3037 }
3038 }
3039 if (!(size = ROUND_SIZE( 0, size ))) goto done; /* wrap-around */
3040
3041 /* Reserve a properly aligned area */
3042
3043 server_enter_uninterrupted_section( &csVirtual, &sigset );
3044
3045 get_vprot_flags( protect, &vprot, sec_flags & SEC_IMAGE );
3046 vprot |= sec_flags;
3047 if (!(sec_flags & SEC_RESERVE)) vprot |= VPROT_COMMITTED;
3048 res = map_view( &view, *addr_ptr, size, mask, FALSE, vprot );
3049 if (res)
3050 {
3051 server_leave_uninterrupted_section( &csVirtual, &sigset );
3052 goto done;
3053 }
3054
3055 /* Map the file */
3056
3057 TRACE("handle=%p size=%lx offset=%x%08x\n",
3058 handle, size, offset.u.HighPart, offset.u.LowPart );
3059
3060 res = map_file_into_view( view, unix_handle, 0, size, offset.QuadPart, vprot, needs_close );
3061 if (res == STATUS_SUCCESS)
3062 {
3063 SERVER_START_REQ( map_view )
3064 {
3065 req->mapping = wine_server_obj_handle( handle );
3066 req->access = access;
3067 req->base = wine_server_client_ptr( view->base );
3068 req->size = size;
3069 req->start = offset.QuadPart;
3070 res = wine_server_call( req );
3071 }
3072 SERVER_END_REQ;
3073 }
3074
3075 if (res == STATUS_SUCCESS)
3076 {
3077 *addr_ptr = view->base;
3078 *size_ptr = size;
3079 VIRTUAL_DEBUG_DUMP_VIEW( view );
3080 }
3081 else
3082 {
3083 ERR( "map_file_into_view %p %lx %x%08x failed\n",
3084 view->base, size, offset.u.HighPart, offset.u.LowPart );
3085 delete_view( view );
3086 }
3087
3088 server_leave_uninterrupted_section( &csVirtual, &sigset );
3089
3090 done:
3091 if (needs_close) close( unix_handle );
3092 return res;
3093 }
3094
3095
3096 /***********************************************************************
3097 * NtUnmapViewOfSection (NTDLL.@)
3098 * ZwUnmapViewOfSection (NTDLL.@)
3099 */
3100 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
3101 {
3102 struct file_view *view;
3103 NTSTATUS status = STATUS_NOT_MAPPED_VIEW;
3104 sigset_t sigset;
3105
3106 if (process != NtCurrentProcess())
3107 {
3108 apc_call_t call;
3109 apc_result_t result;
3110
3111 memset( &call, 0, sizeof(call) );
3112
3113 call.unmap_view.type = APC_UNMAP_VIEW;
3114 call.unmap_view.addr = wine_server_client_ptr( addr );
3115 status = server_queue_process_apc( process, &call, &result );
3116 if (status == STATUS_SUCCESS) status = result.unmap_view.status;
3117 return status;
3118 }
3119
3120 server_enter_uninterrupted_section( &csVirtual, &sigset );
3121 if ((view = VIRTUAL_FindView( addr, 0 )) && !is_view_valloc( view ))
3122 {
3123 if (!(view->protect & VPROT_SYSTEM))
3124 {
3125 SERVER_START_REQ( unmap_view )
3126 {
3127 req->base = wine_server_client_ptr( view->base );
3128 status = wine_server_call( req );
3129 }
3130 SERVER_END_REQ;
3131 if (!status) delete_view( view );
3132 else FIXME( "failed to unmap %p %x\n", view->base, status );
3133 }
3134 else delete_view( view );
3135 }
3136 server_leave_uninterrupted_section( &csVirtual, &sigset );
3137 return status;
3138 }
3139
3140
3141 /******************************************************************************
3142 * NtQuerySection (NTDLL.@)
3143 * ZwQuerySection (NTDLL.@)
3144 */
3145 NTSTATUS WINAPI NtQuerySection( HANDLE handle, SECTION_INFORMATION_CLASS class, void *ptr,
3146 ULONG size, ULONG *ret_size )
3147 {
3148 NTSTATUS status;
3149 pe_image_info_t image_info;
3150
3151 switch (class)
3152 {
3153 case SectionBasicInformation:
3154 if (size < sizeof(SECTION_BASIC_INFORMATION)) return STATUS_INFO_LENGTH_MISMATCH;
3155 break;
3156 case SectionImageInformation:
3157 if (size < sizeof(SECTION_IMAGE_INFORMATION)) return STATUS_INFO_LENGTH_MISMATCH;
3158 break;
3159 default:
3160 FIXME( "class %u not implemented\n", class );
3161 return STATUS_NOT_IMPLEMENTED;
3162 }
3163 if (!ptr) return STATUS_ACCESS_VIOLATION;
3164
3165 SERVER_START_REQ( get_mapping_info )
3166 {
3167 req->handle = wine_server_obj_handle( handle );
3168 req->access = SECTION_QUERY;
3169 wine_server_set_reply( req, &image_info, sizeof(image_info) );
3170 if (!(status = wine_server_call( req )))
3171 {
3172 if (class == SectionBasicInformation)
3173 {
3174 SECTION_BASIC_INFORMATION *info = ptr;
3175 info->Attributes = reply->flags;
3176 info->BaseAddress = NULL;
3177 info->Size.QuadPart = reply->size;
3178 if (ret_size) *ret_size = sizeof(*info);
3179 }
3180 else if (reply->flags & SEC_IMAGE)
3181 {
3182 SECTION_IMAGE_INFORMATION *info = ptr;
3183 info->TransferAddress = wine_server_get_ptr( image_info.entry_point );
3184 info->ZeroBits = image_info.zerobits;
3185 info->MaximumStackSize = image_info.stack_size;
3186 info->CommittedStackSize = image_info.stack_commit;
3187 info->SubSystemType = image_info.subsystem;
3188 info->SubsystemVersionLow = image_info.subsystem_low;
3189 info->SubsystemVersionHigh = image_info.subsystem_high;
3190 info->GpValue = image_info.gp;
3191 info->ImageCharacteristics = image_info.image_charact;
3192 info->DllCharacteristics = image_info.dll_charact;
3193 info->Machine = image_info.machine;
3194 info->ImageContainsCode = image_info.contains_code;
3195 info->ImageFlags = image_info.image_flags;
3196 info->LoaderFlags = image_info.loader_flags;
3197 info->ImageFileSize = image_info.file_size;
3198 info->CheckSum = image_info.checksum;
3199 if (ret_size) *ret_size = sizeof(*info);
3200 }
3201 else status = STATUS_SECTION_NOT_IMAGE;
3202 }
3203 }
3204 SERVER_END_REQ;
3205
3206 return status;
3207 }
3208
3209
3210 /***********************************************************************
3211 * NtFlushVirtualMemory (NTDLL.@)
3212 * ZwFlushVirtualMemory (NTDLL.@)
3213 */
3214 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
3215 SIZE_T *size_ptr, ULONG unknown )
3216 {
3217 struct file_view *view;
3218 NTSTATUS status = STATUS_SUCCESS;
3219 sigset_t sigset;
3220 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
3221
3222 if (process != NtCurrentProcess())
3223 {
3224 apc_call_t call;
3225 apc_result_t result;
3226
3227 memset( &call, 0, sizeof(call) );
3228
3229 call.virtual_flush.type = APC_VIRTUAL_FLUSH;
3230 call.virtual_flush.addr = wine_server_client_ptr( addr );
3231 call.virtual_flush.size = *size_ptr;
3232 status = server_queue_process_apc( process, &call, &result );
3233 if (status != STATUS_SUCCESS) return status;
3234
3235 if (result.virtual_flush.status == STATUS_SUCCESS)
3236 {
3237 *addr_ptr = wine_server_get_ptr( result.virtual_flush.addr );
3238 *size_ptr = result.virtual_flush.size;
3239 }
3240 return result.virtual_flush.status;
3241 }
3242
3243 server_enter_uninterrupted_section( &csVirtual, &sigset );
3244 if (!(view = VIRTUAL_FindView( addr, *size_ptr ))) status = STATUS_INVALID_PARAMETER;
3245 else
3246 {
3247 if (!*size_ptr) *size_ptr = view->size;
3248 *addr_ptr = addr;
3249 #ifdef MS_ASYNC
3250 if (msync( addr, *size_ptr, MS_ASYNC )) status = STATUS_NOT_MAPPED_DATA;
3251 #endif
3252 }
3253 server_leave_uninterrupted_section( &csVirtual, &sigset );
3254 return status;
3255 }
3256
3257
3258 /***********************************************************************
3259 * NtGetWriteWatch (NTDLL.@)
3260 * ZwGetWriteWatch (NTDLL.@)
3261 */
3262 NTSTATUS WINAPI NtGetWriteWatch( HANDLE process, ULONG flags, PVOID base, SIZE_T size, PVOID *addresses,
3263 ULONG_PTR *count, ULONG *granularity )
3264 {
3265 NTSTATUS status = STATUS_SUCCESS;
3266 sigset_t sigset;
3267
3268 size = ROUND_SIZE( base, size );
3269 base = ROUND_ADDR( base, page_mask );
3270
3271 if (!count || !granularity) return STATUS_ACCESS_VIOLATION;
3272 if (!*count || !size) return STATUS_INVALID_PARAMETER;
3273 if (flags & ~WRITE_WATCH_FLAG_RESET) return STATUS_INVALID_PARAMETER;
3274
3275 if (!addresses) return STATUS_ACCESS_VIOLATION;
3276
3277 TRACE( "%p %x %p-%p %p %lu\n", process, flags, base, (char *)base + size,
3278 addresses, *count );
3279
3280 server_enter_uninterrupted_section( &csVirtual, &sigset );
3281
3282 if (is_write_watch_range( base, size ))
3283 {
3284 ULONG_PTR pos = 0;
3285 char *addr = base;
3286 char *end = addr + size;
3287
3288 while (pos < *count && addr < end)
3289 {
3290 if (!(get_page_vprot( addr ) & VPROT_WRITEWATCH)) addresses[pos++] = addr;
3291 addr += page_size;
3292 }
3293 if (flags & WRITE_WATCH_FLAG_RESET) reset_write_watches( base, addr - (char *)base );
3294 *count = pos;
3295 *granularity = page_size;
3296 }
3297 else status = STATUS_INVALID_PARAMETER;
3298
3299 server_leave_uninterrupted_section( &csVirtual, &sigset );
3300 return status;
3301 }
3302
3303
3304 /***********************************************************************
3305 * NtResetWriteWatch (NTDLL.@)
3306 * ZwResetWriteWatch (NTDLL.@)
3307 */
3308 NTSTATUS WINAPI NtResetWriteWatch( HANDLE process, PVOID base, SIZE_T size )
3309 {
3310 NTSTATUS status = STATUS_SUCCESS;
3311 sigset_t sigset;
3312
3313 size = ROUND_SIZE( base, size );
3314 base = ROUND_ADDR( base, page_mask );
3315
3316 TRACE( "%p %p-%p\n", process, base, (char *)base + size );
3317
3318 if (!size) return STATUS_INVALID_PARAMETER;
3319
3320 server_enter_uninterrupted_section( &csVirtual, &sigset );
3321
3322 if (is_write_watch_range( base, size ))
3323 reset_write_watches( base, size );
3324 else
3325 status = STATUS_INVALID_PARAMETER;
3326
3327 server_leave_uninterrupted_section( &csVirtual, &sigset );
3328 return status;
3329 }
3330
3331
3332 /***********************************************************************
3333 * NtReadVirtualMemory (NTDLL.@)
3334 * ZwReadVirtualMemory (NTDLL.@)
3335 */
3336 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
3337 SIZE_T size, SIZE_T *bytes_read )
3338 {
3339 NTSTATUS status;
3340
3341 if (virtual_check_buffer_for_write( buffer, size ))
3342 {
3343 SERVER_START_REQ( read_process_memory )
3344 {
3345 req->handle = wine_server_obj_handle( process );
3346 req->addr = wine_server_client_ptr( addr );
3347 wine_server_set_reply( req, buffer, size );
3348 if ((status = wine_server_call( req ))) size = 0;
3349 }
3350 SERVER_END_REQ;
3351 }
3352 else
3353 {
3354 status = STATUS_ACCESS_VIOLATION;
3355 size = 0;
3356 }
3357 if (bytes_read) *bytes_read = size;
3358 return status;
3359 }
3360
3361
3362 /***********************************************************************
3363 * NtWriteVirtualMemory (NTDLL.@)
3364 * ZwWriteVirtualMemory (NTDLL.@)
3365 */
3366 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
3367 SIZE_T size, SIZE_T *bytes_written )
3368 {
3369 NTSTATUS status;
3370
3371 if (virtual_check_buffer_for_read( buffer, size ))
3372 {
3373 SERVER_START_REQ( write_process_memory )
3374 {
3375 req->handle = wine_server_obj_handle( process );
3376 req->addr = wine_server_client_ptr( addr );
3377 wine_server_add_data( req, buffer, size );
3378 if ((status = wine_server_call( req ))) size = 0;
3379 }
3380 SERVER_END_REQ;
3381 }
3382 else
3383 {
3384 status = STATUS_PARTIAL_COPY;
3385 size = 0;
3386 }
3387 if (bytes_written) *bytes_written = size;
3388 return status;
3389 }
3390
3391
3392 /***********************************************************************
3393 * NtAreMappedFilesTheSame (NTDLL.@)
3394 * ZwAreMappedFilesTheSame (NTDLL.@)
3395 */
3396 NTSTATUS WINAPI NtAreMappedFilesTheSame(PVOID addr1, PVOID addr2)
3397 {
3398 struct file_view *view1, *view2;
3399 NTSTATUS status;
3400 sigset_t sigset;
3401
3402 TRACE("%p %p\n", addr1, addr2);
3403
3404 server_enter_uninterrupted_section( &csVirtual, &sigset );
3405
3406 view1 = VIRTUAL_FindView( addr1, 0 );
3407 view2 = VIRTUAL_FindView( addr2, 0 );
3408
3409 if (!view1 || !view2)
3410 status = STATUS_INVALID_ADDRESS;
3411 else if (is_view_valloc( view1 ) || is_view_valloc( view2 ))
3412 status = STATUS_CONFLICTING_ADDRESSES;
3413 else if (view1 == view2)
3414 status = STATUS_SUCCESS;
3415 else if ((view1->protect & VPROT_SYSTEM) || (view2->protect & VPROT_SYSTEM))
3416 status = STATUS_NOT_SAME_DEVICE;
3417 else
3418 {
3419 SERVER_START_REQ( is_same_mapping )
3420 {
3421 req->base1 = wine_server_client_ptr( view1->base );
3422 req->base2 = wine_server_client_ptr( view2->base );
3423 status = wine_server_call( req );
3424 }
3425 SERVER_END_REQ;
3426 }
3427
3428 server_leave_uninterrupted_section( &csVirtual, &sigset );
3429 return status;
3430 }
Windows API implementation