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ntdll: Implementation of inter-process VirtualQueryEx.
[wine/wine-kai.git] / dlls / ntdll / virtual.c
blob0407a213078595c41701cedea2ae4c707671eace
1 /*
2 * Win32 virtual memory functions
3 *
4 * Copyright 1997, 2002 Alexandre Julliard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 */
20
21 #include "config.h"
22 #include "wine/port.h"
23
24 #include <assert.h>
25 #include <errno.h>
26 #ifdef HAVE_SYS_ERRNO_H
27 #include <sys/errno.h>
28 #endif
29 #include <fcntl.h>
30 #ifdef HAVE_UNISTD_H
31 # include <unistd.h>
32 #endif
33 #include <stdarg.h>
34 #include <stdlib.h>
35 #include <stdio.h>
36 #include <string.h>
37 #include <sys/types.h>
38 #ifdef HAVE_SYS_STAT_H
39 # include <sys/stat.h>
40 #endif
41 #ifdef HAVE_SYS_MMAN_H
42 # include <sys/mman.h>
43 #endif
44
45 #define NONAMELESSUNION
46 #define NONAMELESSSTRUCT
47 #include "ntstatus.h"
48 #define WIN32_NO_STATUS
49 #include "windef.h"
50 #include "winternl.h"
51 #include "winioctl.h"
52 #include "wine/library.h"
53 #include "wine/server.h"
54 #include "wine/list.h"
55 #include "wine/debug.h"
56 #include "ntdll_misc.h"
57
58 WINE_DEFAULT_DEBUG_CHANNEL(virtual);
59 WINE_DECLARE_DEBUG_CHANNEL(module);
60
61 #ifndef MS_SYNC
62 #define MS_SYNC 0
63 #endif
64
65 #ifndef MAP_NORESERVE
66 #define MAP_NORESERVE 0
67 #endif
68
69 /* File view */
70 typedef struct file_view
71 {
72 struct list entry; /* Entry in global view list */
73 void *base; /* Base address */
74 size_t size; /* Size in bytes */
75 HANDLE mapping; /* Handle to the file mapping */
76 BYTE flags; /* Allocation flags (VFLAG_*) */
77 BYTE protect; /* Protection for all pages at allocation time */
78 BYTE prot[1]; /* Protection byte for each page */
79 } FILE_VIEW;
80
81 /* Per-view flags */
82 #define VFLAG_SYSTEM 0x01 /* system view (underlying mmap not under our control) */
83 #define VFLAG_VALLOC 0x02 /* allocated by VirtualAlloc */
84
85 /* Conversion from VPROT_* to Win32 flags */
86 static const BYTE VIRTUAL_Win32Flags[16] =
87 {
88 PAGE_NOACCESS, /* 0 */
89 PAGE_READONLY, /* READ */
90 PAGE_READWRITE, /* WRITE */
91 PAGE_READWRITE, /* READ | WRITE */
92 PAGE_EXECUTE, /* EXEC */
93 PAGE_EXECUTE_READ, /* READ | EXEC */
94 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
95 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
96 PAGE_WRITECOPY, /* WRITECOPY */
97 PAGE_WRITECOPY, /* READ | WRITECOPY */
98 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
99 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
100 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
101 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
102 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
103 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
104 };
105
106 static struct list views_list = LIST_INIT(views_list);
107
108 static RTL_CRITICAL_SECTION csVirtual;
109 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
110 {
111 0, 0, &csVirtual,
112 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
113 0, 0, { (DWORD_PTR)(__FILE__ ": csVirtual") }
114 };
115 static RTL_CRITICAL_SECTION csVirtual = { &critsect_debug, -1, 0, 0, 0, 0 };
116
117 #ifdef __i386__
118 /* These are always the same on an i386, and it will be faster this way */
119 # define page_mask 0xfff
120 # define page_shift 12
121 # define page_size 0x1000
122 /* Note: these are Windows limits, you cannot change them. */
123 # define ADDRESS_SPACE_LIMIT ((void *)0xc0000000) /* top of the total available address space */
124 # define USER_SPACE_LIMIT ((void *)0x7fff0000) /* top of the user address space */
125 #else
126 static UINT page_shift;
127 static UINT page_size;
128 static UINT_PTR page_mask;
129 # define ADDRESS_SPACE_LIMIT 0 /* no limit needed on other platforms */
130 # define USER_SPACE_LIMIT 0 /* no limit needed on other platforms */
131 #endif /* __i386__ */
132
133 #define ROUND_ADDR(addr,mask) \
134 ((void *)((UINT_PTR)(addr) & ~(UINT_PTR)(mask)))
135
136 #define ROUND_SIZE(addr,size) \
137 (((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
138
139 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
140 do { if (TRACE_ON(virtual)) VIRTUAL_DumpView(view); } while (0)
141
142 static void *user_space_limit = USER_SPACE_LIMIT;
143 static void *preload_reserve_start;
144 static void *preload_reserve_end;
145 static int use_locks;
146 static int force_exec_prot; /* whether to force PROT_EXEC on all PROT_READ mmaps */
147
148
149 /***********************************************************************
150 * VIRTUAL_GetProtStr
151 */
152 static const char *VIRTUAL_GetProtStr( BYTE prot )
153 {
154 static char buffer[6];
155 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
156 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
157 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
158 buffer[3] = (prot & VPROT_WRITECOPY) ? 'W' : ((prot & VPROT_WRITE) ? 'w' : '-');
159 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
160 buffer[5] = 0;
161 return buffer;
162 }
163
164
165 /***********************************************************************
166 * VIRTUAL_GetUnixProt
167 *
168 * Convert page protections to protection for mmap/mprotect.
169 */
170 static int VIRTUAL_GetUnixProt( BYTE vprot )
171 {
172 int prot = 0;
173 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
174 {
175 if (vprot & VPROT_READ) prot |= PROT_READ;
176 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
177 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
178 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
179 }
180 if (!prot) prot = PROT_NONE;
181 return prot;
182 }
183
184
185 /***********************************************************************
186 * VIRTUAL_DumpView
187 */
188 static void VIRTUAL_DumpView( FILE_VIEW *view )
189 {
190 UINT i, count;
191 char *addr = view->base;
192 BYTE prot = view->prot[0];
193
194 TRACE( "View: %p - %p", addr, addr + view->size - 1 );
195 if (view->flags & VFLAG_SYSTEM)
196 TRACE( " (system)\n" );
197 else if (view->flags & VFLAG_VALLOC)
198 TRACE( " (valloc)\n" );
199 else if (view->mapping)
200 TRACE( " %p\n", view->mapping );
201 else
202 TRACE( " (anonymous)\n");
203
204 for (count = i = 1; i < view->size >> page_shift; i++, count++)
205 {
206 if (view->prot[i] == prot) continue;
207 TRACE( " %p - %p %s\n",
208 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
209 addr += (count << page_shift);
210 prot = view->prot[i];
211 count = 0;
212 }
213 if (count)
214 TRACE( " %p - %p %s\n",
215 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
216 }
217
218
219 /***********************************************************************
220 * VIRTUAL_Dump
221 */
222 #if WINE_VM_DEBUG
223 static void VIRTUAL_Dump(void)
224 {
225 sigset_t sigset;
226 struct file_view *view;
227
228 TRACE( "Dump of all virtual memory views:\n" );
229 server_enter_uninterrupted_section( &csVirtual, &sigset );
230 LIST_FOR_EACH_ENTRY( view, &views_list, FILE_VIEW, entry )
231 {
232 VIRTUAL_DumpView( view );
233 }
234 server_leave_uninterrupted_section( &csVirtual, &sigset );
235 }
236 #endif
237
238
239 /***********************************************************************
240 * VIRTUAL_FindView
241 *
242 * Find the view containing a given address. The csVirtual section must be held by caller.
243 *
244 * PARAMS
245 * addr [I] Address
246 *
247 * RETURNS
248 * View: Success
249 * NULL: Failure
250 */
251 static struct file_view *VIRTUAL_FindView( const void *addr )
252 {
253 struct file_view *view;
254
255 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
256 {
257 if (view->base > addr) break;
258 if ((const char*)view->base + view->size > (const char*)addr) return view;
259 }
260 return NULL;
261 }
262
263
264 /***********************************************************************
265 * get_mask
266 */
267 static inline UINT_PTR get_mask( ULONG zero_bits )
268 {
269 if (!zero_bits) return 0xffff; /* allocations are aligned to 64K by default */
270 if (zero_bits < page_shift) zero_bits = page_shift;
271 return (1 << zero_bits) - 1;
272 }
273
274
275 /***********************************************************************
276 * find_view_range
277 *
278 * Find the first view overlapping at least part of the specified range.
279 * The csVirtual section must be held by caller.
280 */
281 static struct file_view *find_view_range( const void *addr, size_t size )
282 {
283 struct file_view *view;
284
285 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
286 {
287 if ((const char *)view->base >= (const char *)addr + size) break;
288 if ((const char *)view->base + view->size > (const char *)addr) return view;
289 }
290 return NULL;
291 }
292
293
294 /***********************************************************************
295 * find_free_area
296 *
297 * Find a free area between views inside the specified range.
298 * The csVirtual section must be held by caller.
299 */
300 static void *find_free_area( void *base, void *end, size_t size, size_t mask, int top_down )
301 {
302 struct list *ptr;
303 void *start;
304
305 if (top_down)
306 {
307 start = ROUND_ADDR( (char *)end - size, mask );
308 if (start >= end || start < base) return NULL;
309
310 for (ptr = views_list.prev; ptr != &views_list; ptr = ptr->prev)
311 {
312 struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
313
314 if ((char *)view->base + view->size <= (char *)start) break;
315 if ((char *)view->base >= (char *)start + size) continue;
316 start = ROUND_ADDR( (char *)view->base - size, mask );
317 /* stop if remaining space is not large enough */
318 if (!start || start >= end || start < base) return NULL;
319 }
320 }
321 else
322 {
323 start = ROUND_ADDR( (char *)base + mask, mask );
324 if (start >= end || (char *)end - (char *)start < size) return NULL;
325
326 for (ptr = views_list.next; ptr != &views_list; ptr = ptr->next)
327 {
328 struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
329
330 if ((char *)view->base >= (char *)start + size) break;
331 if ((char *)view->base + view->size <= (char *)start) continue;
332 start = ROUND_ADDR( (char *)view->base + view->size + mask, mask );
333 /* stop if remaining space is not large enough */
334 if (!start || start >= end || (char *)end - (char *)start < size) return NULL;
335 }
336 }
337 return start;
338 }
339
340
341 /***********************************************************************
342 * add_reserved_area
343 *
344 * Add a reserved area to the list maintained by libwine.
345 * The csVirtual section must be held by caller.
346 */
347 static void add_reserved_area( void *addr, size_t size )
348 {
349 TRACE( "adding %p-%p\n", addr, (char *)addr + size );
350
351 if (addr < user_space_limit)
352 {
353 /* unmap the part of the area that is below the limit */
354 assert( (char *)addr + size > (char *)user_space_limit );
355 munmap( addr, (char *)user_space_limit - (char *)addr );
356 size -= (char *)user_space_limit - (char *)addr;
357 addr = user_space_limit;
358 }
359 /* blow away existing mappings */
360 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
361 wine_mmap_add_reserved_area( addr, size );
362 }
363
364
365 /***********************************************************************
366 * is_beyond_limit
367 *
368 * Check if an address range goes beyond a given limit.
369 */
370 static inline int is_beyond_limit( void *addr, size_t size, void *limit )
371 {
372 return (limit && (addr >= limit || (char *)addr + size > (char *)limit));
373 }
374
375
376 /***********************************************************************
377 * unmap_area
378 *
379 * Unmap an area, or simply replace it by an empty mapping if it is
380 * in a reserved area. The csVirtual section must be held by caller.
381 */
382 static inline void unmap_area( void *addr, size_t size )
383 {
384 if (wine_mmap_is_in_reserved_area( addr, size ))
385 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
386 else if (is_beyond_limit( addr, size, user_space_limit ))
387 add_reserved_area( addr, size );
388 else
389 munmap( addr, size );
390 }
391
392
393 /***********************************************************************
394 * delete_view
395 *
396 * Deletes a view. The csVirtual section must be held by caller.
397 */
398 static void delete_view( struct file_view *view ) /* [in] View */
399 {
400 if (!(view->flags & VFLAG_SYSTEM)) unmap_area( view->base, view->size );
401 list_remove( &view->entry );
402 if (view->mapping) NtClose( view->mapping );
403 free( view );
404 }
405
406
407 /***********************************************************************
408 * create_view
409 *
410 * Create a view. The csVirtual section must be held by caller.
411 */
412 static NTSTATUS create_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
413 {
414 struct file_view *view;
415 struct list *ptr;
416 int unix_prot = VIRTUAL_GetUnixProt( vprot );
417
418 assert( !((UINT_PTR)base & page_mask) );
419 assert( !(size & page_mask) );
420
421 /* Create the view structure */
422
423 if (!(view = malloc( sizeof(*view) + (size >> page_shift) - 1 ))) return STATUS_NO_MEMORY;
424
425 view->base = base;
426 view->size = size;
427 view->flags = 0;
428 view->mapping = 0;
429 view->protect = vprot;
430 memset( view->prot, vprot & ~VPROT_IMAGE, size >> page_shift );
431
432 /* Insert it in the linked list */
433
434 LIST_FOR_EACH( ptr, &views_list )
435 {
436 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
437 if (next->base > base) break;
438 }
439 list_add_before( ptr, &view->entry );
440
441 /* Check for overlapping views. This can happen if the previous view
442 * was a system view that got unmapped behind our back. In that case
443 * we recover by simply deleting it. */
444
445 if ((ptr = list_prev( &views_list, &view->entry )) != NULL)
446 {
447 struct file_view *prev = LIST_ENTRY( ptr, struct file_view, entry );
448 if ((char *)prev->base + prev->size > (char *)base)
449 {
450 TRACE( "overlapping prev view %p-%p for %p-%p\n",
451 prev->base, (char *)prev->base + prev->size,
452 base, (char *)base + view->size );
453 assert( prev->flags & VFLAG_SYSTEM );
454 delete_view( prev );
455 }
456 }
457 if ((ptr = list_next( &views_list, &view->entry )) != NULL)
458 {
459 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
460 if ((char *)base + view->size > (char *)next->base)
461 {
462 TRACE( "overlapping next view %p-%p for %p-%p\n",
463 next->base, (char *)next->base + next->size,
464 base, (char *)base + view->size );
465 assert( next->flags & VFLAG_SYSTEM );
466 delete_view( next );
467 }
468 }
469
470 *view_ret = view;
471 VIRTUAL_DEBUG_DUMP_VIEW( view );
472
473 if (force_exec_prot && (unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
474 {
475 TRACE( "forcing exec permission on %p-%p\n", base, (char *)base + size - 1 );
476 mprotect( base, size, unix_prot | PROT_EXEC );
477 }
478 return STATUS_SUCCESS;
479 }
480
481
482 /***********************************************************************
483 * VIRTUAL_GetWin32Prot
484 *
485 * Convert page protections to Win32 flags.
486 */
487 static DWORD VIRTUAL_GetWin32Prot( BYTE vprot )
488 {
489 DWORD ret = VIRTUAL_Win32Flags[vprot & 0x0f];
490 if (vprot & VPROT_NOCACHE) ret |= PAGE_NOCACHE;
491 if (vprot & VPROT_GUARD) ret |= PAGE_GUARD;
492 return ret;
493 }
494
495
496 /***********************************************************************
497 * VIRTUAL_GetProt
498 *
499 * Build page protections from Win32 flags.
500 *
501 * PARAMS
502 * protect [I] Win32 protection flags
503 *
504 * RETURNS
505 * Value of page protection flags
506 */
507 static BYTE VIRTUAL_GetProt( DWORD protect )
508 {
509 BYTE vprot;
510
511 switch(protect & 0xff)
512 {
513 case PAGE_READONLY:
514 vprot = VPROT_READ;
515 break;
516 case PAGE_READWRITE:
517 vprot = VPROT_READ | VPROT_WRITE;
518 break;
519 case PAGE_WRITECOPY:
520 /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
521 * that the hFile must have been opened with GENERIC_READ and
522 * GENERIC_WRITE access. This is WRONG as tests show that you
523 * only need GENERIC_READ access (at least for Win9x,
524 * FIXME: what about NT?). Thus, we don't put VPROT_WRITE in
525 * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
526 */
527 vprot = VPROT_READ | VPROT_WRITECOPY;
528 break;
529 case PAGE_EXECUTE:
530 vprot = VPROT_EXEC;
531 break;
532 case PAGE_EXECUTE_READ:
533 vprot = VPROT_EXEC | VPROT_READ;
534 break;
535 case PAGE_EXECUTE_READWRITE:
536 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
537 break;
538 case PAGE_EXECUTE_WRITECOPY:
539 /* See comment for PAGE_WRITECOPY above */
540 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
541 break;
542 case PAGE_NOACCESS:
543 default:
544 vprot = 0;
545 break;
546 }
547 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
548 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
549 return vprot;
550 }
551
552
553 /***********************************************************************
554 * VIRTUAL_SetProt
555 *
556 * Change the protection of a range of pages.
557 *
558 * RETURNS
559 * TRUE: Success
560 * FALSE: Failure
561 */
562 static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
563 void *base, /* [in] Starting address */
564 size_t size, /* [in] Size in bytes */
565 BYTE vprot ) /* [in] Protections to use */
566 {
567 int unix_prot = VIRTUAL_GetUnixProt(vprot);
568
569 TRACE("%p-%p %s\n",
570 base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
571
572 if (force_exec_prot && (unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
573 {
574 TRACE( "forcing exec permission on %p-%p\n", base, (char *)base + size - 1 );
575 if (!mprotect( base, size, unix_prot | PROT_EXEC )) goto done;
576 /* exec + write may legitimately fail, in that case fall back to write only */
577 if (!(unix_prot & PROT_WRITE)) return FALSE;
578 }
579
580 if (mprotect( base, size, unix_prot )) return FALSE; /* FIXME: last error */
581
582 done:
583 memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
584 vprot, size >> page_shift );
585 VIRTUAL_DEBUG_DUMP_VIEW( view );
586 return TRUE;
587 }
588
589
590 /***********************************************************************
591 * unmap_extra_space
592 *
593 * Release the extra memory while keeping the range starting on the granularity boundary.
594 */
595 static inline void *unmap_extra_space( void *ptr, size_t total_size, size_t wanted_size, size_t mask )
596 {
597 if ((ULONG_PTR)ptr & mask)
598 {
599 size_t extra = mask + 1 - ((ULONG_PTR)ptr & mask);
600 munmap( ptr, extra );
601 ptr = (char *)ptr + extra;
602 total_size -= extra;
603 }
604 if (total_size > wanted_size)
605 munmap( (char *)ptr + wanted_size, total_size - wanted_size );
606 return ptr;
607 }
608
609
610 struct alloc_area
611 {
612 size_t size;
613 size_t mask;
614 int top_down;
615 void *result;
616 };
617
618 /***********************************************************************
619 * alloc_reserved_area_callback
620 *
621 * Try to map some space inside a reserved area. Callback for wine_mmap_enum_reserved_areas.
622 */
623 static int alloc_reserved_area_callback( void *start, size_t size, void *arg )
624 {
625 static void * const address_space_start = (void *)0x110000;
626 struct alloc_area *alloc = arg;
627 void *end = (char *)start + size;
628
629 if (start < address_space_start) start = address_space_start;
630 if (user_space_limit && end > user_space_limit) end = user_space_limit;
631 if (start >= end) return 0;
632
633 /* make sure we don't touch the preloader reserved range */
634 if (preload_reserve_end >= start)
635 {
636 if (preload_reserve_end >= end)
637 {
638 if (preload_reserve_start <= start) return 0; /* no space in that area */
639 if (preload_reserve_start < end) end = preload_reserve_start;
640 }
641 else if (preload_reserve_start <= start) start = preload_reserve_end;
642 else
643 {
644 /* range is split in two by the preloader reservation, try first part */
645 if ((alloc->result = find_free_area( start, preload_reserve_start, alloc->size,
646 alloc->mask, alloc->top_down )))
647 return 1;
648 /* then fall through to try second part */
649 start = preload_reserve_end;
650 }
651 }
652 if ((alloc->result = find_free_area( start, end, alloc->size, alloc->mask, alloc->top_down )))
653 return 1;
654
655 return 0;
656 }
657
658
659 /***********************************************************************
660 * map_view
661 *
662 * Create a view and mmap the corresponding memory area.
663 * The csVirtual section must be held by caller.
664 */
665 static NTSTATUS map_view( struct file_view **view_ret, void *base, size_t size, size_t mask,
666 int top_down, BYTE vprot )
667 {
668 void *ptr;
669 NTSTATUS status;
670
671 if (base)
672 {
673 if (is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
674 return STATUS_WORKING_SET_LIMIT_RANGE;
675
676 switch (wine_mmap_is_in_reserved_area( base, size ))
677 {
678 case -1: /* partially in a reserved area */
679 return STATUS_CONFLICTING_ADDRESSES;
680
681 case 0: /* not in a reserved area, do a normal allocation */
682 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
683 {
684 if (errno == ENOMEM) return STATUS_NO_MEMORY;
685 return STATUS_INVALID_PARAMETER;
686 }
687 if (ptr != base)
688 {
689 /* We couldn't get the address we wanted */
690 if (is_beyond_limit( ptr, size, user_space_limit )) add_reserved_area( ptr, size );
691 else munmap( ptr, size );
692 return STATUS_CONFLICTING_ADDRESSES;
693 }
694 break;
695
696 default:
697 case 1: /* in a reserved area, make sure the address is available */
698 if (find_view_range( base, size )) return STATUS_CONFLICTING_ADDRESSES;
699 /* replace the reserved area by our mapping */
700 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED )) != base)
701 return STATUS_INVALID_PARAMETER;
702 break;
703 }
704 }
705 else
706 {
707 size_t view_size = size + mask + 1;
708 struct alloc_area alloc;
709
710 alloc.size = size;
711 alloc.mask = mask;
712 alloc.top_down = top_down;
713 if (wine_mmap_enum_reserved_areas( alloc_reserved_area_callback, &alloc, top_down ))
714 {
715 ptr = alloc.result;
716 TRACE( "got mem in reserved area %p-%p\n", ptr, (char *)ptr + size );
717 if (wine_anon_mmap( ptr, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED ) != ptr)
718 return STATUS_INVALID_PARAMETER;
719 goto done;
720 }
721
722 for (;;)
723 {
724 if ((ptr = wine_anon_mmap( NULL, view_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
725 {
726 if (errno == ENOMEM) return STATUS_NO_MEMORY;
727 return STATUS_INVALID_PARAMETER;
728 }
729 TRACE( "got mem with anon mmap %p-%p\n", ptr, (char *)ptr + size );
730 /* if we got something beyond the user limit, unmap it and retry */
731 if (is_beyond_limit( ptr, view_size, user_space_limit )) add_reserved_area( ptr, view_size );
732 else break;
733 }
734 ptr = unmap_extra_space( ptr, view_size, size, mask );
735 }
736 done:
737 status = create_view( view_ret, ptr, size, vprot );
738 if (status != STATUS_SUCCESS) unmap_area( ptr, size );
739 return status;
740 }
741
742
743 /***********************************************************************
744 * unaligned_mmap
745 *
746 * Linux kernels before 2.4.x can support non page-aligned offsets, as
747 * long as the offset is aligned to the filesystem block size. This is
748 * a big performance gain so we want to take advantage of it.
749 *
750 * However, when we use 64-bit file support this doesn't work because
751 * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
752 * in that it rounds unaligned offsets down to a page boundary. For
753 * these reasons we do a direct system call here.
754 */
755 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
756 unsigned int flags, int fd, off_t offset )
757 {
758 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
759 if (!(offset >> 32) && (offset & page_mask))
760 {
761 int ret;
762
763 struct
764 {
765 void *addr;
766 unsigned int length;
767 unsigned int prot;
768 unsigned int flags;
769 unsigned int fd;
770 unsigned int offset;
771 } args;
772
773 args.addr = addr;
774 args.length = length;
775 args.prot = prot;
776 args.flags = flags;
777 args.fd = fd;
778 args.offset = offset;
779
780 __asm__ __volatile__("push %%ebx\n\t"
781 "movl %2,%%ebx\n\t"
782 "int $0x80\n\t"
783 "popl %%ebx"
784 : "=a" (ret)
785 : "0" (90), /* SYS_mmap */
786 "q" (&args)
787 : "memory" );
788 if (ret < 0 && ret > -4096)
789 {
790 errno = -ret;
791 ret = -1;
792 }
793 return (void *)ret;
794 }
795 #endif
796 return mmap( addr, length, prot, flags, fd, offset );
797 }
798
799
800 /***********************************************************************
801 * map_file_into_view
802 *
803 * Wrapper for mmap() to map a file into a view, falling back to read if mmap fails.
804 * The csVirtual section must be held by caller.
805 */
806 static NTSTATUS map_file_into_view( struct file_view *view, int fd, size_t start, size_t size,
807 off_t offset, BYTE vprot, BOOL removable )
808 {
809 void *ptr;
810 int prot = VIRTUAL_GetUnixProt( vprot );
811 BOOL shared_write = (vprot & VPROT_WRITE) != 0;
812
813 assert( start < view->size );
814 assert( start + size <= view->size );
815
816 /* only try mmap if media is not removable (or if we require write access) */
817 if (!removable || shared_write)
818 {
819 int flags = MAP_FIXED | (shared_write ? MAP_SHARED : MAP_PRIVATE);
820
821 if (unaligned_mmap( (char *)view->base + start, size, prot, flags, fd, offset ) != (void *)-1)
822 goto done;
823
824 /* mmap() failed; if this is because the file offset is not */
825 /* page-aligned (EINVAL), or because the underlying filesystem */
826 /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
827 if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return FILE_GetNtStatus();
828 if (shared_write) return FILE_GetNtStatus(); /* we cannot fake shared write mappings */
829 }
830
831 /* Reserve the memory with an anonymous mmap */
832 ptr = wine_anon_mmap( (char *)view->base + start, size, PROT_READ | PROT_WRITE, MAP_FIXED );
833 if (ptr == (void *)-1) return FILE_GetNtStatus();
834 /* Now read in the file */
835 pread( fd, ptr, size, offset );
836 if (prot != (PROT_READ|PROT_WRITE)) mprotect( ptr, size, prot ); /* Set the right protection */
837 done:
838 memset( view->prot + (start >> page_shift), vprot, ROUND_SIZE(start,size) >> page_shift );
839 return STATUS_SUCCESS;
840 }
841
842
843 /***********************************************************************
844 * decommit_view
845 *
846 * Decommit some pages of a given view.
847 * The csVirtual section must be held by caller.
848 */
849 static NTSTATUS decommit_pages( struct file_view *view, size_t start, size_t size )
850 {
851 if (wine_anon_mmap( (char *)view->base + start, size, PROT_NONE, MAP_FIXED ) != (void *)-1)
852 {
853 BYTE *p = view->prot + (start >> page_shift);
854 size >>= page_shift;
855 while (size--) *p++ &= ~VPROT_COMMITTED;
856 return STATUS_SUCCESS;
857 }
858 return FILE_GetNtStatus();
859 }
860
861
862 /***********************************************************************
863 * do_relocations
864 *
865 * Apply the relocations to a mapped PE image
866 */
867 static int do_relocations( char *base, const IMAGE_DATA_DIRECTORY *dir,
868 int delta, SIZE_T total_size )
869 {
870 IMAGE_BASE_RELOCATION *rel;
871
872 TRACE_(module)( "relocating from %p-%p to %p-%p\n",
873 base - delta, base - delta + total_size, base, base + total_size );
874
875 for (rel = (IMAGE_BASE_RELOCATION *)(base + dir->VirtualAddress);
876 ((char *)rel < base + dir->VirtualAddress + dir->Size) && rel->SizeOfBlock;
877 rel = (IMAGE_BASE_RELOCATION*)((char*)rel + rel->SizeOfBlock) )
878 {
879 char *page = base + rel->VirtualAddress;
880 WORD *TypeOffset = (WORD *)(rel + 1);
881 int i, count = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(*TypeOffset);
882
883 if (!count) continue;
884
885 /* sanity checks */
886 if ((char *)rel + rel->SizeOfBlock > base + dir->VirtualAddress + dir->Size)
887 {
888 ERR_(module)("invalid relocation %p,%x,%d at %p,%x,%x\n",
889 rel, rel->VirtualAddress, rel->SizeOfBlock,
890 base, dir->VirtualAddress, dir->Size );
891 return 0;
892 }
893
894 if (page > base + total_size)
895 {
896 WARN_(module)("skipping %d relocations for page %p beyond module %p-%p\n",
897 count, page, base, base + total_size );
898 continue;
899 }
900
901 TRACE_(module)("%d relocations for page %x\n", count, rel->VirtualAddress);
902
903 /* patching in reverse order */
904 for (i = 0 ; i < count; i++)
905 {
906 int offset = TypeOffset[i] & 0xFFF;
907 int type = TypeOffset[i] >> 12;
908 switch(type)
909 {
910 case IMAGE_REL_BASED_ABSOLUTE:
911 break;
912 case IMAGE_REL_BASED_HIGH:
913 *(short*)(page+offset) += HIWORD(delta);
914 break;
915 case IMAGE_REL_BASED_LOW:
916 *(short*)(page+offset) += LOWORD(delta);
917 break;
918 case IMAGE_REL_BASED_HIGHLOW:
919 *(int*)(page+offset) += delta;
920 /* FIXME: if this is an exported address, fire up enhanced logic */
921 break;
922 default:
923 FIXME_(module)("Unknown/unsupported fixup type %d.\n", type);
924 break;
925 }
926 }
927 }
928 return 1;
929 }
930
931
932 /***********************************************************************
933 * map_image
934 *
935 * Map an executable (PE format) image into memory.
936 */
937 static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, SIZE_T total_size, SIZE_T mask,
938 SIZE_T header_size, int shared_fd, HANDLE dup_mapping, PVOID *addr_ptr )
939 {
940 IMAGE_DOS_HEADER *dos;
941 IMAGE_NT_HEADERS *nt;
942 IMAGE_SECTION_HEADER *sec;
943 IMAGE_DATA_DIRECTORY *imports;
944 NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
945 int i;
946 off_t pos;
947 sigset_t sigset;
948 struct stat st;
949 struct file_view *view = NULL;
950 char *ptr, *header_end;
951
952 /* zero-map the whole range */
953
954 server_enter_uninterrupted_section( &csVirtual, &sigset );
955
956 if (base >= (char *)0x110000) /* make sure the DOS area remains free */
957 status = map_view( &view, base, total_size, mask, FALSE,
958 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
959
960 if (status == STATUS_CONFLICTING_ADDRESSES)
961 status = map_view( &view, NULL, total_size, mask, FALSE,
962 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
963
964 if (status != STATUS_SUCCESS) goto error;
965
966 ptr = view->base;
967 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
968
969 /* map the header */
970
971 if (fstat( fd, &st ) == -1)
972 {
973 status = FILE_GetNtStatus();
974 goto error;
975 }
976 status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
977 if (!st.st_size) goto error;
978 header_size = min( header_size, st.st_size );
979 if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
980 !dup_mapping ) != STATUS_SUCCESS) goto error;
981 dos = (IMAGE_DOS_HEADER *)ptr;
982 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
983 header_end = ptr + ROUND_SIZE( 0, header_size );
984 memset( ptr + header_size, 0, header_end - (ptr + header_size) );
985 if ((char *)(nt + 1) > header_end) goto error;
986 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
987 if ((char *)(sec + nt->FileHeader.NumberOfSections) > header_end) goto error;
988
989 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
990 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
991
992 /* check the architecture */
993
994 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
995 {
996 MESSAGE("Trying to load PE image for unsupported architecture (");
997 switch (nt->FileHeader.Machine)
998 {
999 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
1000 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
1001 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
1002 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
1003 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
1004 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
1005 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
1006 case IMAGE_FILE_MACHINE_IA64: MESSAGE("IA-64"); break;
1007 case IMAGE_FILE_MACHINE_ALPHA64: MESSAGE("Alpha-64"); break;
1008 case IMAGE_FILE_MACHINE_AMD64: MESSAGE("AMD-64"); break;
1009 case IMAGE_FILE_MACHINE_ARM: MESSAGE("ARM"); break;
1010 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
1011 }
1012 MESSAGE(")\n");
1013 goto error;
1014 }
1015
1016 /* check for non page-aligned binary */
1017
1018 if (nt->OptionalHeader.SectionAlignment <= page_mask)
1019 {
1020 /* unaligned sections, this happens for native subsystem binaries */
1021 /* in that case Windows simply maps in the whole file */
1022
1023 if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ,
1024 !dup_mapping ) != STATUS_SUCCESS) goto error;
1025
1026 /* check that all sections are loaded at the right offset */
1027 if (nt->OptionalHeader.FileAlignment != nt->OptionalHeader.SectionAlignment) goto error;
1028 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
1029 {
1030 if (sec[i].VirtualAddress != sec[i].PointerToRawData)
1031 goto error; /* Windows refuses to load in that case too */
1032 }
1033
1034 /* set the image protections */
1035 VIRTUAL_SetProt( view, ptr, total_size,
1036 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
1037
1038 /* perform relocations if necessary */
1039 /* FIXME: not 100% compatible, Windows doesn't do this for non page-aligned binaries */
1040 if (ptr != base)
1041 {
1042 const IMAGE_DATA_DIRECTORY *relocs;
1043 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1044 if (relocs->VirtualAddress && relocs->Size)
1045 do_relocations( ptr, relocs, ptr - base, total_size );
1046 }
1047
1048 goto done;
1049 }
1050
1051
1052 /* map all the sections */
1053
1054 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1055 {
1056 static const SIZE_T sector_align = 0x1ff;
1057 SIZE_T map_size, file_start, file_size, end;
1058
1059 if (!sec->Misc.VirtualSize)
1060 map_size = ROUND_SIZE( 0, sec->SizeOfRawData );
1061 else
1062 map_size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
1063
1064 /* file positions are rounded to sector boundaries regardless of OptionalHeader.FileAlignment */
1065 file_start = sec->PointerToRawData & ~sector_align;
1066 file_size = (sec->SizeOfRawData + (sec->PointerToRawData & sector_align) + sector_align) & ~sector_align;
1067 if (file_size > map_size) file_size = map_size;
1068
1069 /* a few sanity checks */
1070 end = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, map_size );
1071 if (sec->VirtualAddress > total_size || end > total_size || end < sec->VirtualAddress)
1072 {
1073 WARN_(module)( "Section %.8s too large (%x+%lx/%lx)\n",
1074 sec->Name, sec->VirtualAddress, map_size, total_size );
1075 goto error;
1076 }
1077
1078 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
1079 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
1080 {
1081 TRACE_(module)( "mapping shared section %.8s at %p off %x (%x) size %lx (%lx) flags %x\n",
1082 sec->Name, ptr + sec->VirtualAddress,
1083 sec->PointerToRawData, (int)pos, file_size, map_size,
1084 sec->Characteristics );
1085 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, map_size, pos,
1086 VPROT_COMMITTED | VPROT_READ | VPROT_WRITE,
1087 FALSE ) != STATUS_SUCCESS)
1088 {
1089 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
1090 goto error;
1091 }
1092
1093 /* check if the import directory falls inside this section */
1094 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
1095 imports->VirtualAddress < sec->VirtualAddress + map_size)
1096 {
1097 UINT_PTR base = imports->VirtualAddress & ~page_mask;
1098 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
1099 if (end > sec->VirtualAddress + map_size) end = sec->VirtualAddress + map_size;
1100 if (end > base)
1101 map_file_into_view( view, shared_fd, base, end - base,
1102 pos + (base - sec->VirtualAddress),
1103 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1104 FALSE );
1105 }
1106 pos += map_size;
1107 continue;
1108 }
1109
1110 TRACE_(module)( "mapping section %.8s at %p off %x size %x virt %x flags %x\n",
1111 sec->Name, ptr + sec->VirtualAddress,
1112 sec->PointerToRawData, sec->SizeOfRawData,
1113 sec->Misc.VirtualSize, sec->Characteristics );
1114
1115 if (!sec->PointerToRawData || !file_size) continue;
1116
1117 /* Note: if the section is not aligned properly map_file_into_view will magically
1118 * fall back to read(), so we don't need to check anything here.
1119 */
1120 end = file_start + file_size;
1121 if (sec->PointerToRawData >= st.st_size ||
1122 end > ((st.st_size + sector_align) & ~sector_align) ||
1123 end < file_start ||
1124 map_file_into_view( view, fd, sec->VirtualAddress, file_size, file_start,
1125 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
1126 !dup_mapping ) != STATUS_SUCCESS)
1127 {
1128 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
1129 goto error;
1130 }
1131
1132 if (file_size & page_mask)
1133 {
1134 end = ROUND_SIZE( 0, file_size );
1135 if (end > map_size) end = map_size;
1136 TRACE_(module)("clearing %p - %p\n",
1137 ptr + sec->VirtualAddress + file_size,
1138 ptr + sec->VirtualAddress + end );
1139 memset( ptr + sec->VirtualAddress + file_size, 0, end - file_size );
1140 }
1141 }
1142
1143
1144 /* perform base relocation, if necessary */
1145
1146 if (ptr != base)
1147 {
1148 const IMAGE_DATA_DIRECTORY *relocs;
1149
1150 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1151 if (nt->FileHeader.Characteristics & IMAGE_FILE_RELOCS_STRIPPED)
1152 {
1153 WARN( "Need to relocate module from addr %x, but there are no relocation records\n",
1154 nt->OptionalHeader.ImageBase );
1155 status = STATUS_CONFLICTING_ADDRESSES;
1156 goto error;
1157 }
1158
1159 /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
1160 * really make sure that the *new* base address is also > 2GB.
1161 * Some DLLs really check the MSB of the module handle :-/
1162 */
1163 if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((ULONG_PTR)base & 0x80000000))
1164 ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
1165
1166 if (!do_relocations( ptr, relocs, ptr - base, total_size ))
1167 {
1168 goto error;
1169 }
1170 }
1171
1172 /* set the image protections */
1173
1174 VIRTUAL_SetProt( view, ptr, ROUND_SIZE( 0, header_size ), VPROT_COMMITTED | VPROT_READ );
1175
1176 sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
1177 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1178 {
1179 SIZE_T size;
1180 BYTE vprot = VPROT_COMMITTED;
1181
1182 if (sec->Misc.VirtualSize)
1183 size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
1184 else
1185 size = ROUND_SIZE( sec->VirtualAddress, sec->SizeOfRawData );
1186
1187 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
1188 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_READ|VPROT_WRITECOPY;
1189 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
1190
1191 /* Dumb game crack lets the AOEP point into a data section. Adjust. */
1192 if ((nt->OptionalHeader.AddressOfEntryPoint >= sec->VirtualAddress) &&
1193 (nt->OptionalHeader.AddressOfEntryPoint < sec->VirtualAddress + size))
1194 vprot |= VPROT_EXEC;
1195
1196 VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
1197 }
1198
1199 done:
1200 view->mapping = dup_mapping;
1201 server_leave_uninterrupted_section( &csVirtual, &sigset );
1202
1203 *addr_ptr = ptr;
1204 return STATUS_SUCCESS;
1205
1206 error:
1207 if (view) delete_view( view );
1208 server_leave_uninterrupted_section( &csVirtual, &sigset );
1209 if (dup_mapping) NtClose( dup_mapping );
1210 return status;
1211 }
1212
1213
1214 /***********************************************************************
1215 * is_current_process
1216 *
1217 * Check whether a process handle is for the current process.
1218 */
1219 BOOL is_current_process( HANDLE handle )
1220 {
1221 BOOL ret = FALSE;
1222
1223 if (handle == NtCurrentProcess()) return TRUE;
1224 SERVER_START_REQ( get_process_info )
1225 {
1226 req->handle = handle;
1227 if (!wine_server_call( req ))
1228 ret = ((DWORD)reply->pid == GetCurrentProcessId());
1229 }
1230 SERVER_END_REQ;
1231 return ret;
1232 }
1233
1234
1235 /***********************************************************************
1236 * virtual_init
1237 */
1238 void virtual_init(void)
1239 {
1240 const char *preload;
1241 #ifndef page_mask
1242 page_size = getpagesize();
1243 page_mask = page_size - 1;
1244 /* Make sure we have a power of 2 */
1245 assert( !(page_size & page_mask) );
1246 page_shift = 0;
1247 while ((1 << page_shift) != page_size) page_shift++;
1248 #endif /* page_mask */
1249 if ((preload = getenv("WINEPRELOADRESERVE")))
1250 {
1251 unsigned long start, end;
1252 if (sscanf( preload, "%lx-%lx", &start, &end ) == 2)
1253 {
1254 preload_reserve_start = (void *)start;
1255 preload_reserve_end = (void *)end;
1256 }
1257 }
1258 }
1259
1260
1261 /***********************************************************************
1262 * virtual_init_threading
1263 */
1264 void virtual_init_threading(void)
1265 {
1266 use_locks = 1;
1267 }
1268
1269
1270 /***********************************************************************
1271 * VIRTUAL_HandleFault
1272 */
1273 NTSTATUS VIRTUAL_HandleFault( LPCVOID addr )
1274 {
1275 FILE_VIEW *view;
1276 NTSTATUS ret = STATUS_ACCESS_VIOLATION;
1277 sigset_t sigset;
1278
1279 server_enter_uninterrupted_section( &csVirtual, &sigset );
1280 if ((view = VIRTUAL_FindView( addr )))
1281 {
1282 void *page = ROUND_ADDR( addr, page_mask );
1283 BYTE vprot = view->prot[((const char *)page - (const char *)view->base) >> page_shift];
1284 if (vprot & VPROT_GUARD)
1285 {
1286 VIRTUAL_SetProt( view, page, page_size, vprot & ~VPROT_GUARD );
1287 ret = STATUS_GUARD_PAGE_VIOLATION;
1288 }
1289 }
1290 server_leave_uninterrupted_section( &csVirtual, &sigset );
1291 return ret;
1292 }
1293
1294
1295 /***********************************************************************
1296 * VIRTUAL_SetForceExec
1297 *
1298 * Whether to force exec prot on all views.
1299 */
1300 void VIRTUAL_SetForceExec( BOOL enable )
1301 {
1302 struct file_view *view;
1303 sigset_t sigset;
1304
1305 server_enter_uninterrupted_section( &csVirtual, &sigset );
1306 if (!force_exec_prot != !enable) /* change all existing views */
1307 {
1308 force_exec_prot = enable;
1309
1310 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
1311 {
1312 UINT i, count;
1313 int unix_prot;
1314 char *addr = view->base;
1315 BYTE prot = view->prot[0];
1316
1317 for (count = i = 1; i < view->size >> page_shift; i++, count++)
1318 {
1319 if (view->prot[i] == prot) continue;
1320 unix_prot = VIRTUAL_GetUnixProt( prot );
1321 if ((unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
1322 {
1323 TRACE( "%s exec prot for %p-%p\n",
1324 force_exec_prot ? "enabling" : "disabling",
1325 addr, addr + (count << page_shift) - 1 );
1326 mprotect( addr, count << page_shift,
1327 unix_prot | (force_exec_prot ? PROT_EXEC : 0) );
1328 }
1329 addr += (count << page_shift);
1330 prot = view->prot[i];
1331 count = 0;
1332 }
1333 if (count)
1334 {
1335 unix_prot = VIRTUAL_GetUnixProt( prot );
1336 if ((unix_prot & PROT_READ) && !(unix_prot & PROT_EXEC))
1337 {
1338 TRACE( "%s exec prot for %p-%p\n",
1339 force_exec_prot ? "enabling" : "disabling",
1340 addr, addr + (count << page_shift) - 1 );
1341 mprotect( addr, count << page_shift,
1342 unix_prot | (force_exec_prot ? PROT_EXEC : 0) );
1343 }
1344 }
1345 }
1346 }
1347 server_leave_uninterrupted_section( &csVirtual, &sigset );
1348 }
1349
1350
1351 /***********************************************************************
1352 * VIRTUAL_UseLargeAddressSpace
1353 *
1354 * Increase the address space size for apps that support it.
1355 */
1356 void VIRTUAL_UseLargeAddressSpace(void)
1357 {
1358 /* no large address space on win9x */
1359 if (NtCurrentTeb()->Peb->OSPlatformId != VER_PLATFORM_WIN32_NT) return;
1360 user_space_limit = ADDRESS_SPACE_LIMIT;
1361 }
1362
1363
1364 /***********************************************************************
1365 * NtAllocateVirtualMemory (NTDLL.@)
1366 * ZwAllocateVirtualMemory (NTDLL.@)
1367 */
1368 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
1369 SIZE_T *size_ptr, ULONG type, ULONG protect )
1370 {
1371 void *base;
1372 BYTE vprot;
1373 SIZE_T size = *size_ptr;
1374 SIZE_T mask = get_mask( zero_bits );
1375 NTSTATUS status = STATUS_SUCCESS;
1376 struct file_view *view;
1377 sigset_t sigset;
1378
1379 TRACE("%p %p %08lx %x %08x\n", process, *ret, size, type, protect );
1380
1381 if (!size) return STATUS_INVALID_PARAMETER;
1382
1383 if (process != NtCurrentProcess())
1384 {
1385 apc_call_t call;
1386 apc_result_t result;
1387
1388 call.virtual_alloc.type = APC_VIRTUAL_ALLOC;
1389 call.virtual_alloc.addr = *ret;
1390 call.virtual_alloc.size = *size_ptr;
1391 call.virtual_alloc.zero_bits = zero_bits;
1392 call.virtual_alloc.op_type = type;
1393 call.virtual_alloc.prot = protect;
1394 status = NTDLL_queue_process_apc( process, &call, &result );
1395 if (status != STATUS_SUCCESS) return status;
1396
1397 if (result.virtual_alloc.status == STATUS_SUCCESS)
1398 {
1399 *ret = result.virtual_alloc.addr;
1400 *size_ptr = result.virtual_alloc.size;
1401 }
1402 return result.virtual_alloc.status;
1403 }
1404
1405 /* Round parameters to a page boundary */
1406
1407 if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
1408
1409 if (*ret)
1410 {
1411 if (type & MEM_RESERVE) /* Round down to 64k boundary */
1412 base = ROUND_ADDR( *ret, mask );
1413 else
1414 base = ROUND_ADDR( *ret, page_mask );
1415 size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1416
1417 /* disallow low 64k, wrap-around and kernel space */
1418 if (((char *)base < (char *)0x10000) ||
1419 ((char *)base + size < (char *)base) ||
1420 is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
1421 return STATUS_INVALID_PARAMETER;
1422 }
1423 else
1424 {
1425 base = NULL;
1426 size = (size + page_mask) & ~page_mask;
1427 }
1428
1429 /* Compute the alloc type flags */
1430
1431 if (!(type & MEM_SYSTEM))
1432 {
1433 if (!(type & (MEM_COMMIT | MEM_RESERVE)) ||
1434 (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_TOP_DOWN | MEM_WRITE_WATCH | MEM_RESET)))
1435 {
1436 WARN("called with wrong alloc type flags (%08x) !\n", type);
1437 return STATUS_INVALID_PARAMETER;
1438 }
1439 if (type & MEM_WRITE_WATCH)
1440 {
1441 FIXME("MEM_WRITE_WATCH type not supported\n");
1442 return STATUS_NOT_SUPPORTED;
1443 }
1444 }
1445 vprot = VIRTUAL_GetProt( protect );
1446 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
1447
1448 /* Reserve the memory */
1449
1450 if (use_locks) server_enter_uninterrupted_section( &csVirtual, &sigset );
1451
1452 if (type & MEM_SYSTEM)
1453 {
1454 if (type & MEM_IMAGE) vprot |= VPROT_IMAGE;
1455 status = create_view( &view, base, size, vprot | VPROT_COMMITTED );
1456 if (status == STATUS_SUCCESS)
1457 {
1458 view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
1459 base = view->base;
1460 }
1461 }
1462 else if ((type & MEM_RESERVE) || !base)
1463 {
1464 status = map_view( &view, base, size, mask, type & MEM_TOP_DOWN, vprot );
1465 if (status == STATUS_SUCCESS)
1466 {
1467 view->flags |= VFLAG_VALLOC;
1468 base = view->base;
1469 }
1470 }
1471 else /* commit the pages */
1472 {
1473 if (!(view = VIRTUAL_FindView( base )) ||
1474 ((char *)base + size > (char *)view->base + view->size)) status = STATUS_NOT_MAPPED_VIEW;
1475 else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1476 }
1477
1478 if (use_locks) server_leave_uninterrupted_section( &csVirtual, &sigset );
1479
1480 if (status == STATUS_SUCCESS)
1481 {
1482 *ret = base;
1483 *size_ptr = size;
1484 }
1485 return status;
1486 }
1487
1488
1489 /***********************************************************************
1490 * NtFreeVirtualMemory (NTDLL.@)
1491 * ZwFreeVirtualMemory (NTDLL.@)
1492 */
1493 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr, ULONG type )
1494 {
1495 FILE_VIEW *view;
1496 char *base;
1497 sigset_t sigset;
1498 NTSTATUS status = STATUS_SUCCESS;
1499 LPVOID addr = *addr_ptr;
1500 SIZE_T size = *size_ptr;
1501
1502 TRACE("%p %p %08lx %x\n", process, addr, size, type );
1503
1504 if (process != NtCurrentProcess())
1505 {
1506 apc_call_t call;
1507 apc_result_t result;
1508
1509 call.virtual_free.type = APC_VIRTUAL_FREE;
1510 call.virtual_free.addr = addr;
1511 call.virtual_free.size = size;
1512 call.virtual_free.op_type = type;
1513 status = NTDLL_queue_process_apc( process, &call, &result );
1514 if (status != STATUS_SUCCESS) return status;
1515
1516 if (result.virtual_free.status == STATUS_SUCCESS)
1517 {
1518 *addr_ptr = result.virtual_free.addr;
1519 *size_ptr = result.virtual_free.size;
1520 }
1521 return result.virtual_free.status;
1522 }
1523
1524 /* Fix the parameters */
1525
1526 size = ROUND_SIZE( addr, size );
1527 base = ROUND_ADDR( addr, page_mask );
1528
1529 /* avoid freeing the DOS area when a broken app passes a NULL pointer */
1530 if (!base && !(type & MEM_SYSTEM)) return STATUS_INVALID_PARAMETER;
1531
1532 server_enter_uninterrupted_section( &csVirtual, &sigset );
1533
1534 if (!(view = VIRTUAL_FindView( base )) ||
1535 (base + size > (char *)view->base + view->size) ||
1536 !(view->flags & VFLAG_VALLOC))
1537 {
1538 status = STATUS_INVALID_PARAMETER;
1539 }
1540 else if (type & MEM_SYSTEM)
1541 {
1542 /* return the values that the caller should use to unmap the area */
1543 *addr_ptr = view->base;
1544 if (!wine_mmap_is_in_reserved_area( view->base, view->size )) *size_ptr = view->size;
1545 else *size_ptr = 0; /* make sure we don't munmap anything from a reserved area */
1546 view->flags |= VFLAG_SYSTEM;
1547 delete_view( view );
1548 }
1549 else if (type == MEM_RELEASE)
1550 {
1551 /* Free the pages */
1552
1553 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
1554 else
1555 {
1556 delete_view( view );
1557 *addr_ptr = base;
1558 *size_ptr = size;
1559 }
1560 }
1561 else if (type == MEM_DECOMMIT)
1562 {
1563 status = decommit_pages( view, base - (char *)view->base, size );
1564 if (status == STATUS_SUCCESS)
1565 {
1566 *addr_ptr = base;
1567 *size_ptr = size;
1568 }
1569 }
1570 else
1571 {
1572 WARN("called with wrong free type flags (%08x) !\n", type);
1573 status = STATUS_INVALID_PARAMETER;
1574 }
1575
1576 server_leave_uninterrupted_section( &csVirtual, &sigset );
1577 return status;
1578 }
1579
1580
1581 /***********************************************************************
1582 * NtProtectVirtualMemory (NTDLL.@)
1583 * ZwProtectVirtualMemory (NTDLL.@)
1584 */
1585 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, SIZE_T *size_ptr,
1586 ULONG new_prot, ULONG *old_prot )
1587 {
1588 FILE_VIEW *view;
1589 sigset_t sigset;
1590 NTSTATUS status = STATUS_SUCCESS;
1591 char *base;
1592 UINT i;
1593 BYTE vprot, *p;
1594 ULONG prot;
1595 SIZE_T size = *size_ptr;
1596 LPVOID addr = *addr_ptr;
1597
1598 TRACE("%p %p %08lx %08x\n", process, addr, size, new_prot );
1599
1600 if (!is_current_process( process ))
1601 {
1602 ERR("Unsupported on other process\n");
1603 return STATUS_ACCESS_DENIED;
1604 }
1605
1606 /* Fix the parameters */
1607
1608 size = ROUND_SIZE( addr, size );
1609 base = ROUND_ADDR( addr, page_mask );
1610
1611 server_enter_uninterrupted_section( &csVirtual, &sigset );
1612
1613 if (!(view = VIRTUAL_FindView( base )) || (base + size > (char *)view->base + view->size))
1614 {
1615 status = STATUS_INVALID_PARAMETER;
1616 }
1617 else
1618 {
1619 /* Make sure all the pages are committed */
1620
1621 p = view->prot + ((base - (char *)view->base) >> page_shift);
1622 prot = VIRTUAL_GetWin32Prot( *p );
1623 for (i = size >> page_shift; i; i--, p++)
1624 {
1625 if (!(*p & VPROT_COMMITTED))
1626 {
1627 status = STATUS_NOT_COMMITTED;
1628 break;
1629 }
1630 }
1631 if (!i)
1632 {
1633 if (old_prot) *old_prot = prot;
1634 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1635 if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1636 }
1637 }
1638 server_leave_uninterrupted_section( &csVirtual, &sigset );
1639
1640 if (status == STATUS_SUCCESS)
1641 {
1642 *addr_ptr = base;
1643 *size_ptr = size;
1644 }
1645 return status;
1646 }
1647
1648 #define UNIMPLEMENTED_INFO_CLASS(c) \
1649 case c: \
1650 FIXME("(process=%p,addr=%p) Unimplemented information class: " #c "\n", process, addr); \
1651 return STATUS_INVALID_INFO_CLASS
1652
1653 /***********************************************************************
1654 * NtQueryVirtualMemory (NTDLL.@)
1655 * ZwQueryVirtualMemory (NTDLL.@)
1656 */
1657 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
1658 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
1659 SIZE_T len, SIZE_T *res_len )
1660 {
1661 FILE_VIEW *view;
1662 char *base, *alloc_base = 0;
1663 struct list *ptr;
1664 SIZE_T size = 0;
1665 MEMORY_BASIC_INFORMATION *info = buffer;
1666 sigset_t sigset;
1667
1668 if (info_class != MemoryBasicInformation)
1669 {
1670 switch(info_class)
1671 {
1672 UNIMPLEMENTED_INFO_CLASS(MemoryWorkingSetList);
1673 UNIMPLEMENTED_INFO_CLASS(MemorySectionName);
1674 UNIMPLEMENTED_INFO_CLASS(MemoryBasicVlmInformation);
1675
1676 default:
1677 FIXME("(%p,%p,info_class=%d,%p,%ld,%p) Unknown information class\n",
1678 process, addr, info_class, buffer, len, res_len);
1679 return STATUS_INVALID_INFO_CLASS;
1680 }
1681 }
1682 if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
1683 return STATUS_WORKING_SET_LIMIT_RANGE;
1684
1685 if (process != NtCurrentProcess())
1686 {
1687 NTSTATUS status;
1688 apc_call_t call;
1689 apc_result_t result;
1690
1691 call.virtual_query.type = APC_VIRTUAL_QUERY;
1692 call.virtual_query.addr = addr;
1693 status = NTDLL_queue_process_apc( process, &call, &result );
1694 if (status != STATUS_SUCCESS) return status;
1695
1696 if (result.virtual_query.status == STATUS_SUCCESS)
1697 {
1698 info->BaseAddress = result.virtual_query.base;
1699 info->AllocationBase = result.virtual_query.alloc_base;
1700 info->RegionSize = result.virtual_query.size;
1701 info->State = result.virtual_query.state;
1702 info->Protect = result.virtual_query.prot;
1703 info->AllocationProtect = result.virtual_query.alloc_prot;
1704 info->Type = result.virtual_query.alloc_type;
1705 if (res_len) *res_len = sizeof(*info);
1706 }
1707 return result.virtual_query.status;
1708 }
1709
1710 base = ROUND_ADDR( addr, page_mask );
1711
1712 /* Find the view containing the address */
1713
1714 server_enter_uninterrupted_section( &csVirtual, &sigset );
1715 ptr = list_head( &views_list );
1716 for (;;)
1717 {
1718 if (!ptr)
1719 {
1720 /* make the address space end at the user limit, except if
1721 * the last view was mapped beyond that */
1722 if (alloc_base <= (char *)user_space_limit)
1723 {
1724 if (user_space_limit && base >= (char *)user_space_limit)
1725 {
1726 server_leave_uninterrupted_section( &csVirtual, &sigset );
1727 return STATUS_WORKING_SET_LIMIT_RANGE;
1728 }
1729 size = (char *)user_space_limit - alloc_base;
1730 }
1731 else size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1732 view = NULL;
1733 break;
1734 }
1735 view = LIST_ENTRY( ptr, struct file_view, entry );
1736 if ((char *)view->base > base)
1737 {
1738 size = (char *)view->base - alloc_base;
1739 view = NULL;
1740 break;
1741 }
1742 if ((char *)view->base + view->size > base)
1743 {
1744 alloc_base = view->base;
1745 size = view->size;
1746 break;
1747 }
1748 alloc_base = (char *)view->base + view->size;
1749 ptr = list_next( &views_list, ptr );
1750 }
1751
1752 /* Fill the info structure */
1753
1754 if (!view)
1755 {
1756 info->State = MEM_FREE;
1757 info->Protect = PAGE_NOACCESS;
1758 info->AllocationBase = 0;
1759 info->AllocationProtect = 0;
1760 info->Type = 0;
1761 }
1762 else
1763 {
1764 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1765 info->State = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
1766 info->Protect = VIRTUAL_GetWin32Prot( vprot );
1767 info->AllocationBase = alloc_base;
1768 info->AllocationProtect = VIRTUAL_GetWin32Prot( view->protect );
1769 if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
1770 else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
1771 else info->Type = MEM_MAPPED;
1772 for (size = base - alloc_base; size < view->size; size += page_size)
1773 if (view->prot[size >> page_shift] != vprot) break;
1774 }
1775 server_leave_uninterrupted_section( &csVirtual, &sigset );
1776
1777 info->BaseAddress = base;
1778 info->RegionSize = size - (base - alloc_base);
1779 if (res_len) *res_len = sizeof(*info);
1780 return STATUS_SUCCESS;
1781 }
1782
1783
1784 /***********************************************************************
1785 * NtLockVirtualMemory (NTDLL.@)
1786 * ZwLockVirtualMemory (NTDLL.@)
1787 */
1788 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1789 {
1790 if (!is_current_process( process ))
1791 {
1792 ERR("Unsupported on other process\n");
1793 return STATUS_ACCESS_DENIED;
1794 }
1795 return STATUS_SUCCESS;
1796 }
1797
1798
1799 /***********************************************************************
1800 * NtUnlockVirtualMemory (NTDLL.@)
1801 * ZwUnlockVirtualMemory (NTDLL.@)
1802 */
1803 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, SIZE_T *size, ULONG unknown )
1804 {
1805 if (!is_current_process( process ))
1806 {
1807 ERR("Unsupported on other process\n");
1808 return STATUS_ACCESS_DENIED;
1809 }
1810 return STATUS_SUCCESS;
1811 }
1812
1813
1814 /***********************************************************************
1815 * NtCreateSection (NTDLL.@)
1816 * ZwCreateSection (NTDLL.@)
1817 */
1818 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
1819 const LARGE_INTEGER *size, ULONG protect,
1820 ULONG sec_flags, HANDLE file )
1821 {
1822 NTSTATUS ret;
1823 BYTE vprot;
1824 DWORD len = (attr && attr->ObjectName) ? attr->ObjectName->Length : 0;
1825
1826 /* Check parameters */
1827
1828 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1829
1830 vprot = VIRTUAL_GetProt( protect );
1831 if (sec_flags & SEC_RESERVE)
1832 {
1833 if (file) return STATUS_INVALID_PARAMETER;
1834 }
1835 else vprot |= VPROT_COMMITTED;
1836 if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1837 if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
1838
1839 /* Create the server object */
1840
1841 SERVER_START_REQ( create_mapping )
1842 {
1843 req->access = access;
1844 req->attributes = (attr) ? attr->Attributes : 0;
1845 req->rootdir = attr ? attr->RootDirectory : 0;
1846 req->file_handle = file;
1847 req->size_high = size ? size->u.HighPart : 0;
1848 req->size_low = size ? size->u.LowPart : 0;
1849 req->protect = vprot;
1850 if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
1851 ret = wine_server_call( req );
1852 *handle = reply->handle;
1853 }
1854 SERVER_END_REQ;
1855 return ret;
1856 }
1857
1858
1859 /***********************************************************************
1860 * NtOpenSection (NTDLL.@)
1861 * ZwOpenSection (NTDLL.@)
1862 */
1863 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
1864 {
1865 NTSTATUS ret;
1866 DWORD len = attr->ObjectName->Length;
1867
1868 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1869
1870 SERVER_START_REQ( open_mapping )
1871 {
1872 req->access = access;
1873 req->attributes = (attr) ? attr->Attributes : 0;
1874 req->rootdir = attr ? attr->RootDirectory : 0;
1875 wine_server_add_data( req, attr->ObjectName->Buffer, len );
1876 if (!(ret = wine_server_call( req ))) *handle = reply->handle;
1877 }
1878 SERVER_END_REQ;
1879 return ret;
1880 }
1881
1882
1883 /***********************************************************************
1884 * NtMapViewOfSection (NTDLL.@)
1885 * ZwMapViewOfSection (NTDLL.@)
1886 */
1887 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
1888 SIZE_T commit_size, const LARGE_INTEGER *offset_ptr, SIZE_T *size_ptr,
1889 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
1890 {
1891 NTSTATUS res;
1892 SIZE_T size = 0;
1893 SIZE_T mask = get_mask( zero_bits );
1894 int unix_handle = -1, needs_close;
1895 int prot;
1896 void *base;
1897 struct file_view *view;
1898 DWORD size_low, size_high, header_size, shared_size;
1899 HANDLE dup_mapping, shared_file;
1900 LARGE_INTEGER offset;
1901 sigset_t sigset;
1902
1903 offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
1904
1905 TRACE("handle=%p process=%p addr=%p off=%x%08x size=%lx access=%x\n",
1906 handle, process, *addr_ptr, offset.u.HighPart, offset.u.LowPart, size, protect );
1907
1908 if (!is_current_process( process ))
1909 {
1910 ERR("Unsupported on other process\n");
1911 return STATUS_ACCESS_DENIED;
1912 }
1913
1914 /* Check parameters */
1915
1916 if ((offset.u.LowPart & mask) || (*addr_ptr && ((UINT_PTR)*addr_ptr & mask)))
1917 return STATUS_INVALID_PARAMETER;
1918
1919 SERVER_START_REQ( get_mapping_info )
1920 {
1921 req->handle = handle;
1922 res = wine_server_call( req );
1923 prot = reply->protect;
1924 base = reply->base;
1925 size_low = reply->size_low;
1926 size_high = reply->size_high;
1927 header_size = reply->header_size;
1928 dup_mapping = reply->mapping;
1929 shared_file = reply->shared_file;
1930 shared_size = reply->shared_size;
1931 }
1932 SERVER_END_REQ;
1933 if (res) return res;
1934
1935 size = ((ULONGLONG)size_high << 32) | size_low;
1936 if (sizeof(size) == sizeof(size_low) && size_high)
1937 ERR( "Sizes larger than 4Gb (%x%08x) not supported on this platform\n", size_high, size_low );
1938
1939 if ((res = server_get_unix_fd( handle, 0, &unix_handle, &needs_close, NULL, NULL ))) goto done;
1940
1941 if (prot & VPROT_IMAGE)
1942 {
1943 if (shared_file)
1944 {
1945 int shared_fd, shared_needs_close;
1946
1947 if ((res = server_get_unix_fd( shared_file, FILE_READ_DATA|FILE_WRITE_DATA,
1948 &shared_fd, &shared_needs_close, NULL, NULL ))) goto done;
1949 res = map_image( handle, unix_handle, base, size, mask, header_size,
1950 shared_fd, dup_mapping, addr_ptr );
1951 if (shared_needs_close) close( shared_fd );
1952 NtClose( shared_file );
1953 }
1954 else
1955 {
1956 res = map_image( handle, unix_handle, base, size, mask, header_size,
1957 -1, dup_mapping, addr_ptr );
1958 }
1959 if (needs_close) close( unix_handle );
1960 if (!res) *size_ptr = size;
1961 return res;
1962 }
1963
1964 if ((offset.QuadPart >= size) || (*size_ptr > size - offset.QuadPart))
1965 {
1966 res = STATUS_INVALID_PARAMETER;
1967 goto done;
1968 }
1969 if (*size_ptr) size = ROUND_SIZE( offset.u.LowPart, *size_ptr );
1970 else size = size - offset.QuadPart;
1971
1972 switch(protect)
1973 {
1974 case PAGE_NOACCESS:
1975 break;
1976 case PAGE_READWRITE:
1977 case PAGE_EXECUTE_READWRITE:
1978 if (!(prot & VPROT_WRITE))
1979 {
1980 res = STATUS_INVALID_PARAMETER;
1981 goto done;
1982 }
1983 /* fall through */
1984 case PAGE_READONLY:
1985 case PAGE_WRITECOPY:
1986 case PAGE_EXECUTE:
1987 case PAGE_EXECUTE_READ:
1988 case PAGE_EXECUTE_WRITECOPY:
1989 if (prot & VPROT_READ) break;
1990 /* fall through */
1991 default:
1992 res = STATUS_INVALID_PARAMETER;
1993 goto done;
1994 }
1995
1996 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1997 * which has a view of this mapping commits some pages, they will
1998 * appear committed in all other processes, which have the same
1999 * view created. Since we don't support this yet, we create the
2000 * whole mapping committed.
2001 */
2002 prot |= VPROT_COMMITTED;
2003
2004 /* Reserve a properly aligned area */
2005
2006 server_enter_uninterrupted_section( &csVirtual, &sigset );
2007
2008 res = map_view( &view, *addr_ptr, size, mask, FALSE, prot );
2009 if (res)
2010 {
2011 server_leave_uninterrupted_section( &csVirtual, &sigset );
2012 goto done;
2013 }
2014
2015 /* Map the file */
2016
2017 TRACE("handle=%p size=%lx offset=%x%08x\n",
2018 handle, size, offset.u.HighPart, offset.u.LowPart );
2019
2020 res = map_file_into_view( view, unix_handle, 0, size, offset.QuadPart, prot, !dup_mapping );
2021 if (res == STATUS_SUCCESS)
2022 {
2023 *addr_ptr = view->base;
2024 *size_ptr = size;
2025 view->mapping = dup_mapping;
2026 dup_mapping = 0; /* don't close it */
2027 }
2028 else
2029 {
2030 ERR( "map_file_into_view %p %lx %x%08x failed\n",
2031 view->base, size, offset.u.HighPart, offset.u.LowPart );
2032 delete_view( view );
2033 }
2034
2035 server_leave_uninterrupted_section( &csVirtual, &sigset );
2036
2037 done:
2038 if (dup_mapping) NtClose( dup_mapping );
2039 if (needs_close) close( unix_handle );
2040 return res;
2041 }
2042
2043
2044 /***********************************************************************
2045 * NtUnmapViewOfSection (NTDLL.@)
2046 * ZwUnmapViewOfSection (NTDLL.@)
2047 */
2048 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
2049 {
2050 FILE_VIEW *view;
2051 NTSTATUS status = STATUS_INVALID_PARAMETER;
2052 sigset_t sigset;
2053 void *base = ROUND_ADDR( addr, page_mask );
2054
2055 if (!is_current_process( process ))
2056 {
2057 ERR("Unsupported on other process\n");
2058 return STATUS_ACCESS_DENIED;
2059 }
2060 server_enter_uninterrupted_section( &csVirtual, &sigset );
2061 if ((view = VIRTUAL_FindView( base )) && (base == view->base))
2062 {
2063 delete_view( view );
2064 status = STATUS_SUCCESS;
2065 }
2066 server_leave_uninterrupted_section( &csVirtual, &sigset );
2067 return status;
2068 }
2069
2070
2071 /***********************************************************************
2072 * NtFlushVirtualMemory (NTDLL.@)
2073 * ZwFlushVirtualMemory (NTDLL.@)
2074 */
2075 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
2076 SIZE_T *size_ptr, ULONG unknown )
2077 {
2078 FILE_VIEW *view;
2079 NTSTATUS status = STATUS_SUCCESS;
2080 sigset_t sigset;
2081 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
2082
2083 if (!is_current_process( process ))
2084 {
2085 ERR("Unsupported on other process\n");
2086 return STATUS_ACCESS_DENIED;
2087 }
2088 server_enter_uninterrupted_section( &csVirtual, &sigset );
2089 if (!(view = VIRTUAL_FindView( addr ))) status = STATUS_INVALID_PARAMETER;
2090 else
2091 {
2092 if (!*size_ptr) *size_ptr = view->size;
2093 *addr_ptr = addr;
2094 if (msync( addr, *size_ptr, MS_SYNC )) status = STATUS_NOT_MAPPED_DATA;
2095 }
2096 server_leave_uninterrupted_section( &csVirtual, &sigset );
2097 return status;
2098 }
2099
2100
2101 /***********************************************************************
2102 * NtReadVirtualMemory (NTDLL.@)
2103 * ZwReadVirtualMemory (NTDLL.@)
2104 */
2105 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
2106 SIZE_T size, SIZE_T *bytes_read )
2107 {
2108 NTSTATUS status;
2109
2110 SERVER_START_REQ( read_process_memory )
2111 {
2112 req->handle = process;
2113 req->addr = (void *)addr;
2114 wine_server_set_reply( req, buffer, size );
2115 if ((status = wine_server_call( req ))) size = 0;
2116 }
2117 SERVER_END_REQ;
2118 if (bytes_read) *bytes_read = size;
2119 return status;
2120 }
2121
2122
2123 /***********************************************************************
2124 * NtWriteVirtualMemory (NTDLL.@)
2125 * ZwWriteVirtualMemory (NTDLL.@)
2126 */
2127 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
2128 SIZE_T size, SIZE_T *bytes_written )
2129 {
2130 NTSTATUS status;
2131
2132 SERVER_START_REQ( write_process_memory )
2133 {
2134 req->handle = process;
2135 req->addr = addr;
2136 wine_server_add_data( req, buffer, size );
2137 if ((status = wine_server_call( req ))) size = 0;
2138 }
2139 SERVER_END_REQ;
2140 if (bytes_written) *bytes_written = size;
2141 return status;
2142 }
Work in progress by Kai Blin