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Implement NtAccessCheck.
[wine/gsoc-2012-control.git] / dlls / ntdll / virtual.c
blobb5f4411c2127edfc0697883d52deab0fd8844f6a
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 <stdlib.h>
34 #include <stdio.h>
35 #include <string.h>
36 #include <sys/types.h>
37 #ifdef HAVE_SYS_MMAN_H
38 #include <sys/mman.h>
39 #endif
40
41 #define NONAMELESSUNION
42 #define NONAMELESSSTRUCT
43 #include "ntstatus.h"
44 #include "thread.h"
45 #include "winternl.h"
46 #include "winioctl.h"
47 #include "wine/library.h"
48 #include "wine/server.h"
49 #include "wine/list.h"
50 #include "wine/debug.h"
51 #include "ntdll_misc.h"
52
53 WINE_DEFAULT_DEBUG_CHANNEL(virtual);
54 WINE_DECLARE_DEBUG_CHANNEL(module);
55
56 #ifndef MS_SYNC
57 #define MS_SYNC 0
58 #endif
59
60 #ifndef MAP_NORESERVE
61 #define MAP_NORESERVE 0
62 #endif
63
64 /* File view */
65 typedef struct file_view
66 {
67 struct list entry; /* Entry in global view list */
68 void *base; /* Base address */
69 UINT size; /* Size in bytes */
70 HANDLE mapping; /* Handle to the file mapping */
71 BYTE flags; /* Allocation flags (VFLAG_*) */
72 BYTE protect; /* Protection for all pages at allocation time */
73 BYTE prot[1]; /* Protection byte for each page */
74 } FILE_VIEW;
75
76 /* Per-view flags */
77 #define VFLAG_SYSTEM 0x01 /* system view (underlying mmap not under our control) */
78 #define VFLAG_VALLOC 0x02 /* allocated by VirtualAlloc */
79
80 /* Conversion from VPROT_* to Win32 flags */
81 static const BYTE VIRTUAL_Win32Flags[16] =
82 {
83 PAGE_NOACCESS, /* 0 */
84 PAGE_READONLY, /* READ */
85 PAGE_READWRITE, /* WRITE */
86 PAGE_READWRITE, /* READ | WRITE */
87 PAGE_EXECUTE, /* EXEC */
88 PAGE_EXECUTE_READ, /* READ | EXEC */
89 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
90 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
91 PAGE_WRITECOPY, /* WRITECOPY */
92 PAGE_WRITECOPY, /* READ | WRITECOPY */
93 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
94 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
95 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
96 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
97 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
98 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
99 };
100
101 static struct list views_list = LIST_INIT(views_list);
102
103 static CRITICAL_SECTION csVirtual;
104 static CRITICAL_SECTION_DEBUG critsect_debug =
105 {
106 0, 0, &csVirtual,
107 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
108 0, 0, { 0, (DWORD)(__FILE__ ": csVirtual") }
109 };
110 static CRITICAL_SECTION csVirtual = { &critsect_debug, -1, 0, 0, 0, 0 };
111
112 #ifdef __i386__
113 /* These are always the same on an i386, and it will be faster this way */
114 # define page_mask 0xfff
115 # define page_shift 12
116 # define page_size 0x1000
117 /* Note: these are Windows limits, you cannot change them. */
118 # define ADDRESS_SPACE_LIMIT ((void *)0xc0000000) /* top of the total available address space */
119 # define USER_SPACE_LIMIT ((void *)0x80000000) /* top of the user address space */
120 #else
121 static UINT page_shift;
122 static UINT page_mask;
123 static UINT page_size;
124 # define ADDRESS_SPACE_LIMIT 0 /* no limit needed on other platforms */
125 # define USER_SPACE_LIMIT 0 /* no limit needed on other platforms */
126 #endif /* __i386__ */
127 #define granularity_mask 0xffff /* Allocation granularity (usually 64k) */
128
129 #define ROUND_ADDR(addr,mask) \
130 ((void *)((UINT_PTR)(addr) & ~(mask)))
131
132 #define ROUND_SIZE(addr,size) \
133 (((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
134
135 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
136 if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
137
138 static void *user_space_limit = USER_SPACE_LIMIT;
139
140
141 /***********************************************************************
142 * VIRTUAL_GetProtStr
143 */
144 static const char *VIRTUAL_GetProtStr( BYTE prot )
145 {
146 static char buffer[6];
147 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
148 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
149 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
150 buffer[3] = (prot & VPROT_WRITECOPY) ? 'W' : ((prot & VPROT_WRITE) ? 'w' : '-');
151 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
152 buffer[5] = 0;
153 return buffer;
154 }
155
156
157 /***********************************************************************
158 * VIRTUAL_DumpView
159 */
160 static void VIRTUAL_DumpView( FILE_VIEW *view )
161 {
162 UINT i, count;
163 char *addr = view->base;
164 BYTE prot = view->prot[0];
165
166 DPRINTF( "View: %p - %p", addr, addr + view->size - 1 );
167 if (view->flags & VFLAG_SYSTEM)
168 DPRINTF( " (system)\n" );
169 else if (view->flags & VFLAG_VALLOC)
170 DPRINTF( " (valloc)\n" );
171 else if (view->mapping)
172 DPRINTF( " %p\n", view->mapping );
173 else
174 DPRINTF( " (anonymous)\n");
175
176 for (count = i = 1; i < view->size >> page_shift; i++, count++)
177 {
178 if (view->prot[i] == prot) continue;
179 DPRINTF( " %p - %p %s\n",
180 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
181 addr += (count << page_shift);
182 prot = view->prot[i];
183 count = 0;
184 }
185 if (count)
186 DPRINTF( " %p - %p %s\n",
187 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
188 }
189
190
191 /***********************************************************************
192 * VIRTUAL_Dump
193 */
194 void VIRTUAL_Dump(void)
195 {
196 struct file_view *view;
197
198 DPRINTF( "\nDump of all virtual memory views:\n\n" );
199 RtlEnterCriticalSection(&csVirtual);
200 LIST_FOR_EACH_ENTRY( view, &views_list, FILE_VIEW, entry )
201 {
202 VIRTUAL_DumpView( view );
203 }
204 RtlLeaveCriticalSection(&csVirtual);
205 }
206
207
208 /***********************************************************************
209 * VIRTUAL_FindView
210 *
211 * Find the view containing a given address. The csVirtual section must be held by caller.
212 *
213 * PARAMS
214 * addr [I] Address
215 *
216 * RETURNS
217 * View: Success
218 * NULL: Failure
219 */
220 static struct file_view *VIRTUAL_FindView( const void *addr )
221 {
222 struct file_view *view;
223
224 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
225 {
226 if (view->base > addr) break;
227 if ((const char*)view->base + view->size > (const char*)addr) return view;
228 }
229 return NULL;
230 }
231
232
233 /***********************************************************************
234 * find_view_range
235 *
236 * Find the first view overlapping at least part of the specified range.
237 * The csVirtual section must be held by caller.
238 */
239 static struct file_view *find_view_range( const void *addr, size_t size )
240 {
241 struct file_view *view;
242
243 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
244 {
245 if ((const char *)view->base >= (const char *)addr + size) break;
246 if ((const char *)view->base + view->size > (const char *)addr) return view;
247 }
248 return NULL;
249 }
250
251
252 /***********************************************************************
253 * add_reserved_area
254 *
255 * Add a reserved area to the list maintained by libwine.
256 * The csVirtual section must be held by caller.
257 */
258 static void add_reserved_area( void *addr, size_t size )
259 {
260 TRACE( "adding %p-%p\n", addr, (char *)addr + size );
261
262 if (addr < user_space_limit)
263 {
264 /* unmap the part of the area that is below the limit */
265 assert( (char *)addr + size > (char *)user_space_limit );
266 munmap( addr, (char *)user_space_limit - (char *)addr );
267 size -= (char *)user_space_limit - (char *)addr;
268 addr = user_space_limit;
269 }
270 /* blow away existing mappings */
271 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
272 wine_mmap_add_reserved_area( addr, size );
273 }
274
275
276 /***********************************************************************
277 * remove_reserved_area
278 *
279 * Remove a reserved area from the list maintained by libwine.
280 * The csVirtual section must be held by caller.
281 */
282 static void remove_reserved_area( void *addr, size_t size )
283 {
284 struct file_view *view;
285
286 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
287 {
288 if ((char *)view->base >= (char *)addr + size) break;
289 if ((char *)view->base + view->size <= (char *)addr) continue;
290 /* now we have an overlapping view */
291 if (view->base > addr)
292 {
293 wine_mmap_remove_reserved_area( addr, (char *)view->base - (char *)addr, TRUE );
294 size -= (char *)view->base - (char *)addr;
295 addr = view->base;
296 }
297 if ((char *)view->base + view->size >= (char *)addr + size)
298 {
299 /* view covers all the remaining area */
300 wine_mmap_remove_reserved_area( addr, size, FALSE );
301 size = 0;
302 break;
303 }
304 else /* view covers only part of the area */
305 {
306 wine_mmap_remove_reserved_area( addr, (char *)view->base + view->size - (char *)addr, FALSE );
307 size -= (char *)view->base + view->size - (char *)addr;
308 addr = (char *)view->base + view->size;
309 }
310 }
311 /* remove remaining space */
312 if (size) wine_mmap_remove_reserved_area( addr, size, TRUE );
313 }
314
315
316 /***********************************************************************
317 * is_beyond_limit
318 *
319 * Check if an address range goes beyond a given limit.
320 */
321 static inline int is_beyond_limit( void *addr, size_t size, void *limit )
322 {
323 return (limit && (addr >= limit || (char *)addr + size > (char *)limit));
324 }
325
326
327 /***********************************************************************
328 * unmap_area
329 *
330 * Unmap an area, or simply replace it by an empty mapping if it is
331 * in a reserved area. The csVirtual section must be held by caller.
332 */
333 static inline void unmap_area( void *addr, size_t size )
334 {
335 if (wine_mmap_is_in_reserved_area( addr, size ))
336 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
337 else
338 munmap( addr, size );
339 }
340
341
342 /***********************************************************************
343 * delete_view
344 *
345 * Deletes a view. The csVirtual section must be held by caller.
346 */
347 static void delete_view( struct file_view *view ) /* [in] View */
348 {
349 if (!(view->flags & VFLAG_SYSTEM)) unmap_area( view->base, view->size );
350 list_remove( &view->entry );
351 if (view->mapping) NtClose( view->mapping );
352 free( view );
353 }
354
355
356 /***********************************************************************
357 * create_view
358 *
359 * Create a view. The csVirtual section must be held by caller.
360 */
361 static NTSTATUS create_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
362 {
363 struct file_view *view;
364 struct list *ptr;
365
366 assert( !((unsigned int)base & page_mask) );
367 assert( !(size & page_mask) );
368
369 /* Create the view structure */
370
371 if (!(view = malloc( sizeof(*view) + (size >> page_shift) - 1 ))) return STATUS_NO_MEMORY;
372
373 view->base = base;
374 view->size = size;
375 view->flags = 0;
376 view->mapping = 0;
377 view->protect = vprot;
378 memset( view->prot, vprot, size >> page_shift );
379
380 /* Insert it in the linked list */
381
382 LIST_FOR_EACH( ptr, &views_list )
383 {
384 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
385 if (next->base > base) break;
386 }
387 list_add_before( ptr, &view->entry );
388
389 /* Check for overlapping views. This can happen if the previous view
390 * was a system view that got unmapped behind our back. In that case
391 * we recover by simply deleting it. */
392
393 if ((ptr = list_prev( &views_list, &view->entry )) != NULL)
394 {
395 struct file_view *prev = LIST_ENTRY( ptr, struct file_view, entry );
396 if ((char *)prev->base + prev->size > (char *)base)
397 {
398 TRACE( "overlapping prev view %p-%p for %p-%p\n",
399 prev->base, (char *)prev->base + prev->size,
400 base, (char *)base + view->size );
401 assert( prev->flags & VFLAG_SYSTEM );
402 delete_view( prev );
403 }
404 }
405 if ((ptr = list_next( &views_list, &view->entry )) != NULL)
406 {
407 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
408 if ((char *)base + view->size > (char *)next->base)
409 {
410 TRACE( "overlapping next view %p-%p for %p-%p\n",
411 next->base, (char *)next->base + next->size,
412 base, (char *)base + view->size );
413 assert( next->flags & VFLAG_SYSTEM );
414 delete_view( next );
415 }
416 }
417
418 *view_ret = view;
419 VIRTUAL_DEBUG_DUMP_VIEW( view );
420 return STATUS_SUCCESS;
421 }
422
423
424 /***********************************************************************
425 * VIRTUAL_GetUnixProt
426 *
427 * Convert page protections to protection for mmap/mprotect.
428 */
429 static int VIRTUAL_GetUnixProt( BYTE vprot )
430 {
431 int prot = 0;
432 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
433 {
434 if (vprot & VPROT_READ) prot |= PROT_READ;
435 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
436 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
437 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
438 }
439 return prot;
440 }
441
442
443 /***********************************************************************
444 * VIRTUAL_GetWin32Prot
445 *
446 * Convert page protections to Win32 flags.
447 *
448 * RETURNS
449 * None
450 */
451 static void VIRTUAL_GetWin32Prot(
452 BYTE vprot, /* [in] Page protection flags */
453 DWORD *protect, /* [out] Location to store Win32 protection flags */
454 DWORD *state ) /* [out] Location to store mem state flag */
455 {
456 if (protect) {
457 *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
458 /* if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
459 if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
460
461 if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
462 }
463
464 if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
465 }
466
467
468 /***********************************************************************
469 * VIRTUAL_GetProt
470 *
471 * Build page protections from Win32 flags.
472 *
473 * PARAMS
474 * protect [I] Win32 protection flags
475 *
476 * RETURNS
477 * Value of page protection flags
478 */
479 static BYTE VIRTUAL_GetProt( DWORD protect )
480 {
481 BYTE vprot;
482
483 switch(protect & 0xff)
484 {
485 case PAGE_READONLY:
486 vprot = VPROT_READ;
487 break;
488 case PAGE_READWRITE:
489 vprot = VPROT_READ | VPROT_WRITE;
490 break;
491 case PAGE_WRITECOPY:
492 /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
493 * that the hFile must have been opened with GENERIC_READ and
494 * GENERIC_WRITE access. This is WRONG as tests show that you
495 * only need GENERIC_READ access (at least for Win9x,
496 * FIXME: what about NT?). Thus, we don't put VPROT_WRITE in
497 * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
498 */
499 vprot = VPROT_READ | VPROT_WRITECOPY;
500 break;
501 case PAGE_EXECUTE:
502 vprot = VPROT_EXEC;
503 break;
504 case PAGE_EXECUTE_READ:
505 vprot = VPROT_EXEC | VPROT_READ;
506 break;
507 case PAGE_EXECUTE_READWRITE:
508 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
509 break;
510 case PAGE_EXECUTE_WRITECOPY:
511 /* See comment for PAGE_WRITECOPY above */
512 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
513 break;
514 case PAGE_NOACCESS:
515 default:
516 vprot = 0;
517 break;
518 }
519 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
520 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
521 return vprot;
522 }
523
524
525 /***********************************************************************
526 * VIRTUAL_SetProt
527 *
528 * Change the protection of a range of pages.
529 *
530 * RETURNS
531 * TRUE: Success
532 * FALSE: Failure
533 */
534 static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
535 void *base, /* [in] Starting address */
536 UINT size, /* [in] Size in bytes */
537 BYTE vprot ) /* [in] Protections to use */
538 {
539 TRACE("%p-%p %s\n",
540 base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
541
542 if (mprotect( base, size, VIRTUAL_GetUnixProt(vprot) ))
543 return FALSE; /* FIXME: last error */
544
545 memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
546 vprot, size >> page_shift );
547 VIRTUAL_DEBUG_DUMP_VIEW( view );
548 return TRUE;
549 }
550
551
552 /***********************************************************************
553 * map_view
554 *
555 * Create a view and mmap the corresponding memory area.
556 * The csVirtual section must be held by caller.
557 */
558 static NTSTATUS map_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
559 {
560 void *ptr;
561 NTSTATUS status;
562
563 if (base)
564 {
565 if (is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
566 return STATUS_WORKING_SET_LIMIT_RANGE;
567
568 switch (wine_mmap_is_in_reserved_area( base, size ))
569 {
570 case -1: /* partially in a reserved area */
571 return STATUS_CONFLICTING_ADDRESSES;
572
573 case 0: /* not in a reserved area, do a normal allocation */
574 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
575 {
576 if (errno == ENOMEM) return STATUS_NO_MEMORY;
577 return STATUS_INVALID_PARAMETER;
578 }
579 if (ptr != base)
580 {
581 /* We couldn't get the address we wanted */
582 if (is_beyond_limit( ptr, size, user_space_limit )) add_reserved_area( ptr, size );
583 else munmap( ptr, size );
584 return STATUS_CONFLICTING_ADDRESSES;
585 }
586 break;
587
588 default:
589 case 1: /* in a reserved area, make sure the address is available */
590 if (find_view_range( base, size )) return STATUS_CONFLICTING_ADDRESSES;
591 /* replace the reserved area by our mapping */
592 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED )) != base)
593 return STATUS_INVALID_PARAMETER;
594 break;
595 }
596 }
597 else
598 {
599 size_t view_size = size + granularity_mask + 1;
600
601 for (;;)
602 {
603 if ((ptr = wine_anon_mmap( NULL, view_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
604 {
605 if (errno == ENOMEM) return STATUS_NO_MEMORY;
606 return STATUS_INVALID_PARAMETER;
607 }
608 /* if we got something beyond the user limit, unmap it and retry */
609 if (is_beyond_limit( ptr, view_size, user_space_limit )) add_reserved_area( ptr, view_size );
610 else break;
611 }
612
613 /* Release the extra memory while keeping the range
614 * starting on the granularity boundary. */
615 if ((unsigned int)ptr & granularity_mask)
616 {
617 unsigned int extra = granularity_mask + 1 - ((unsigned int)ptr & granularity_mask);
618 munmap( ptr, extra );
619 ptr = (char *)ptr + extra;
620 view_size -= extra;
621 }
622 if (view_size > size)
623 munmap( (char *)ptr + size, view_size - size );
624 }
625
626 status = create_view( view_ret, ptr, size, vprot );
627 if (status != STATUS_SUCCESS) unmap_area( ptr, size );
628 return status;
629 }
630
631
632 /***********************************************************************
633 * unaligned_mmap
634 *
635 * Linux kernels before 2.4.x can support non page-aligned offsets, as
636 * long as the offset is aligned to the filesystem block size. This is
637 * a big performance gain so we want to take advantage of it.
638 *
639 * However, when we use 64-bit file support this doesn't work because
640 * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
641 * in that it rounds unaligned offsets down to a page boundary. For
642 * these reasons we do a direct system call here.
643 */
644 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
645 unsigned int flags, int fd, off_t offset )
646 {
647 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
648 if (!(offset >> 32) && (offset & page_mask))
649 {
650 int ret;
651
652 struct
653 {
654 void *addr;
655 unsigned int length;
656 unsigned int prot;
657 unsigned int flags;
658 unsigned int fd;
659 unsigned int offset;
660 } args;
661
662 args.addr = addr;
663 args.length = length;
664 args.prot = prot;
665 args.flags = flags;
666 args.fd = fd;
667 args.offset = offset;
668
669 __asm__ __volatile__("push %%ebx\n\t"
670 "movl %2,%%ebx\n\t"
671 "int $0x80\n\t"
672 "popl %%ebx"
673 : "=a" (ret)
674 : "0" (90), /* SYS_mmap */
675 "q" (&args)
676 : "memory" );
677 if (ret < 0 && ret > -4096)
678 {
679 errno = -ret;
680 ret = -1;
681 }
682 return (void *)ret;
683 }
684 #endif
685 return mmap( addr, length, prot, flags, fd, offset );
686 }
687
688
689 /***********************************************************************
690 * map_file_into_view
691 *
692 * Wrapper for mmap() to map a file into a view, falling back to read if mmap fails.
693 * The csVirtual section must be held by caller.
694 */
695 static NTSTATUS map_file_into_view( struct file_view *view, int fd, size_t start, size_t size,
696 off_t offset, BYTE vprot, BOOL removable )
697 {
698 void *ptr;
699 int prot = VIRTUAL_GetUnixProt( vprot );
700 BOOL shared_write = (vprot & VPROT_WRITE) != 0;
701
702 assert( start < view->size );
703 assert( start + size <= view->size );
704
705 /* only try mmap if media is not removable (or if we require write access) */
706 if (!removable || shared_write)
707 {
708 int flags = MAP_FIXED | (shared_write ? MAP_SHARED : MAP_PRIVATE);
709
710 if (unaligned_mmap( (char *)view->base + start, size, prot, flags, fd, offset ) != (void *)-1)
711 goto done;
712
713 /* mmap() failed; if this is because the file offset is not */
714 /* page-aligned (EINVAL), or because the underlying filesystem */
715 /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
716 if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return FILE_GetNtStatus();
717 if (shared_write) return FILE_GetNtStatus(); /* we cannot fake shared write mappings */
718 }
719
720 /* Reserve the memory with an anonymous mmap */
721 ptr = wine_anon_mmap( (char *)view->base + start, size, PROT_READ | PROT_WRITE, MAP_FIXED );
722 if (ptr == (void *)-1) return FILE_GetNtStatus();
723 /* Now read in the file */
724 pread( fd, ptr, size, offset );
725 if (prot != (PROT_READ|PROT_WRITE)) mprotect( ptr, size, prot ); /* Set the right protection */
726 done:
727 memset( view->prot + (start >> page_shift), vprot, size >> page_shift );
728 return STATUS_SUCCESS;
729 }
730
731
732 /***********************************************************************
733 * decommit_view
734 *
735 * Decommit some pages of a given view.
736 * The csVirtual section must be held by caller.
737 */
738 static NTSTATUS decommit_pages( struct file_view *view, size_t start, size_t size )
739 {
740 if (wine_anon_mmap( (char *)view->base + start, size, PROT_NONE, MAP_FIXED ) != (void *)-1)
741 {
742 BYTE *p = view->prot + (start >> page_shift);
743 size >>= page_shift;
744 while (size--) *p++ &= ~VPROT_COMMITTED;
745 return STATUS_SUCCESS;
746 }
747 return FILE_GetNtStatus();
748 }
749
750
751 /***********************************************************************
752 * do_relocations
753 *
754 * Apply the relocations to a mapped PE image
755 */
756 static int do_relocations( char *base, const IMAGE_DATA_DIRECTORY *dir,
757 int delta, DWORD total_size )
758 {
759 IMAGE_BASE_RELOCATION *rel;
760
761 TRACE_(module)( "relocating from %p-%p to %p-%p\n",
762 base - delta, base - delta + total_size, base, base + total_size );
763
764 for (rel = (IMAGE_BASE_RELOCATION *)(base + dir->VirtualAddress);
765 ((char *)rel < base + dir->VirtualAddress + dir->Size) && rel->SizeOfBlock;
766 rel = (IMAGE_BASE_RELOCATION*)((char*)rel + rel->SizeOfBlock) )
767 {
768 char *page = base + rel->VirtualAddress;
769 WORD *TypeOffset = (WORD *)(rel + 1);
770 int i, count = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(*TypeOffset);
771
772 if (!count) continue;
773
774 /* sanity checks */
775 if ((char *)rel + rel->SizeOfBlock > base + dir->VirtualAddress + dir->Size ||
776 page > base + total_size)
777 {
778 ERR_(module)("invalid relocation %p,%lx,%ld at %p,%lx,%lx\n",
779 rel, rel->VirtualAddress, rel->SizeOfBlock,
780 base, dir->VirtualAddress, dir->Size );
781 return 0;
782 }
783
784 TRACE_(module)("%ld relocations for page %lx\n", rel->SizeOfBlock, rel->VirtualAddress);
785
786 /* patching in reverse order */
787 for (i = 0 ; i < count; i++)
788 {
789 int offset = TypeOffset[i] & 0xFFF;
790 int type = TypeOffset[i] >> 12;
791 switch(type)
792 {
793 case IMAGE_REL_BASED_ABSOLUTE:
794 break;
795 case IMAGE_REL_BASED_HIGH:
796 *(short*)(page+offset) += HIWORD(delta);
797 break;
798 case IMAGE_REL_BASED_LOW:
799 *(short*)(page+offset) += LOWORD(delta);
800 break;
801 case IMAGE_REL_BASED_HIGHLOW:
802 *(int*)(page+offset) += delta;
803 /* FIXME: if this is an exported address, fire up enhanced logic */
804 break;
805 default:
806 FIXME_(module)("Unknown/unsupported fixup type %d.\n", type);
807 break;
808 }
809 }
810 }
811 return 1;
812 }
813
814
815 /***********************************************************************
816 * map_image
817 *
818 * Map an executable (PE format) image into memory.
819 */
820 static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
821 DWORD header_size, int shared_fd, BOOL removable, PVOID *addr_ptr )
822 {
823 IMAGE_DOS_HEADER *dos;
824 IMAGE_NT_HEADERS *nt;
825 IMAGE_SECTION_HEADER *sec;
826 IMAGE_DATA_DIRECTORY *imports;
827 NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
828 int i;
829 off_t pos;
830 struct file_view *view = NULL;
831 char *ptr;
832
833 /* zero-map the whole range */
834
835 RtlEnterCriticalSection( &csVirtual );
836
837 if (base >= (char *)0x110000) /* make sure the DOS area remains free */
838 status = map_view( &view, base, total_size,
839 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
840
841 if (status == STATUS_CONFLICTING_ADDRESSES)
842 status = map_view( &view, NULL, total_size,
843 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
844
845 if (status != STATUS_SUCCESS) goto error;
846
847 ptr = view->base;
848 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
849
850 /* map the header */
851
852 status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
853 if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ,
854 removable ) != STATUS_SUCCESS) goto error;
855 dos = (IMAGE_DOS_HEADER *)ptr;
856 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
857 if ((char *)(nt + 1) > ptr + header_size) goto error;
858
859 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
860 if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
861
862 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
863 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
864
865 /* check the architecture */
866
867 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
868 {
869 MESSAGE("Trying to load PE image for unsupported architecture (");
870 switch (nt->FileHeader.Machine)
871 {
872 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
873 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
874 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
875 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
876 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
877 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
878 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
879 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
880 }
881 MESSAGE(")\n");
882 goto error;
883 }
884
885 /* check for non page-aligned binary */
886
887 if (nt->OptionalHeader.SectionAlignment <= page_mask)
888 {
889 /* unaligned sections, this happens for native subsystem binaries */
890 /* in that case Windows simply maps in the whole file */
891
892 if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ,
893 removable ) != STATUS_SUCCESS) goto error;
894
895 /* check that all sections are loaded at the right offset */
896 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
897 {
898 if (sec[i].VirtualAddress != sec[i].PointerToRawData)
899 goto error; /* Windows refuses to load in that case too */
900 }
901
902 /* set the image protections */
903 VIRTUAL_SetProt( view, ptr, total_size,
904 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
905
906 /* perform relocations if necessary */
907 /* FIXME: not 100% compatible, Windows doesn't do this for non page-aligned binaries */
908 if (ptr != base)
909 {
910 const IMAGE_DATA_DIRECTORY *relocs;
911 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
912 if (relocs->VirtualAddress && relocs->Size)
913 do_relocations( ptr, relocs, ptr - base, total_size );
914 }
915
916 goto done;
917 }
918
919
920 /* map all the sections */
921
922 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
923 {
924 DWORD size;
925
926 /* a few sanity checks */
927 size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
928 if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
929 {
930 ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
931 sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
932 goto error;
933 }
934
935 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
936 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
937 {
938 size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
939 TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
940 sec->Name, ptr + sec->VirtualAddress,
941 sec->PointerToRawData, (int)pos, sec->SizeOfRawData,
942 size, sec->Characteristics );
943 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, size, pos,
944 VPROT_COMMITTED | VPROT_READ | PROT_WRITE,
945 FALSE ) != STATUS_SUCCESS)
946 {
947 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
948 goto error;
949 }
950
951 /* check if the import directory falls inside this section */
952 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
953 imports->VirtualAddress < sec->VirtualAddress + size)
954 {
955 UINT_PTR base = imports->VirtualAddress & ~page_mask;
956 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
957 if (end > sec->VirtualAddress + size) end = sec->VirtualAddress + size;
958 if (end > base)
959 map_file_into_view( view, shared_fd, base, end - base,
960 pos + (base - sec->VirtualAddress),
961 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
962 FALSE );
963 }
964 pos += size;
965 continue;
966 }
967
968 TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
969 sec->Name, ptr + sec->VirtualAddress,
970 sec->PointerToRawData, sec->SizeOfRawData,
971 sec->Characteristics );
972
973 if ((sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) &&
974 !(sec->Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA)) continue;
975 if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
976
977 /* Note: if the section is not aligned properly map_file_into_view will magically
978 * fall back to read(), so we don't need to check anything here.
979 */
980 if (map_file_into_view( view, fd, sec->VirtualAddress, sec->SizeOfRawData, sec->PointerToRawData,
981 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
982 removable ) != STATUS_SUCCESS)
983 {
984 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
985 goto error;
986 }
987
988 if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
989 {
990 DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
991 if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
992 TRACE_(module)("clearing %p - %p\n",
993 ptr + sec->VirtualAddress + sec->SizeOfRawData,
994 ptr + sec->VirtualAddress + end );
995 memset( ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
996 end - sec->SizeOfRawData );
997 }
998 }
999
1000
1001 /* perform base relocation, if necessary */
1002
1003 if (ptr != base)
1004 {
1005 const IMAGE_DATA_DIRECTORY *relocs;
1006
1007 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1008 if (!relocs->VirtualAddress || !relocs->Size)
1009 {
1010 if (nt->OptionalHeader.ImageBase == 0x400000) {
1011 ERR("Image was mapped at %p: standard load address for a Win32 program (0x00400000) not available\n", ptr);
1012 ERR("Do you have exec-shield or prelink active?\n");
1013 } else
1014 ERR( "FATAL: Need to relocate module from addr %lx, but there are no relocation records\n",
1015 nt->OptionalHeader.ImageBase );
1016 goto error;
1017 }
1018
1019 /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
1020 * really make sure that the *new* base address is also > 2GB.
1021 * Some DLLs really check the MSB of the module handle :-/
1022 */
1023 if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((DWORD)base & 0x80000000))
1024 ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
1025
1026 if (!do_relocations( ptr, relocs, ptr - base, total_size ))
1027 {
1028 goto error;
1029 }
1030 }
1031
1032 /* set the image protections */
1033
1034 sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
1035 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1036 {
1037 DWORD size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
1038 BYTE vprot = VPROT_COMMITTED;
1039 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
1040 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_READ|VPROT_WRITECOPY;
1041 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
1042 VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
1043 }
1044
1045 done:
1046 if (!removable) /* don't keep handle open on removable media */
1047 NtDuplicateObject( NtCurrentProcess(), hmapping,
1048 NtCurrentProcess(), &view->mapping,
1049 0, 0, DUPLICATE_SAME_ACCESS );
1050
1051 RtlLeaveCriticalSection( &csVirtual );
1052
1053 *addr_ptr = ptr;
1054 return STATUS_SUCCESS;
1055
1056 error:
1057 if (view) delete_view( view );
1058 RtlLeaveCriticalSection( &csVirtual );
1059 return status;
1060 }
1061
1062
1063 /***********************************************************************
1064 * is_current_process
1065 *
1066 * Check whether a process handle is for the current process.
1067 */
1068 BOOL is_current_process( HANDLE handle )
1069 {
1070 BOOL ret = FALSE;
1071
1072 if (handle == NtCurrentProcess()) return TRUE;
1073 SERVER_START_REQ( get_process_info )
1074 {
1075 req->handle = handle;
1076 if (!wine_server_call( req ))
1077 ret = ((DWORD)reply->pid == GetCurrentProcessId());
1078 }
1079 SERVER_END_REQ;
1080 return ret;
1081 }
1082
1083
1084 /***********************************************************************
1085 * virtual_init
1086 */
1087 void virtual_init(void)
1088 {
1089 #ifndef page_mask
1090 page_size = getpagesize();
1091 page_mask = page_size - 1;
1092 /* Make sure we have a power of 2 */
1093 assert( !(page_size & page_mask) );
1094 page_shift = 0;
1095 while ((1 << page_shift) != page_size) page_shift++;
1096 #endif /* page_mask */
1097 }
1098
1099
1100 /***********************************************************************
1101 * VIRTUAL_HandleFault
1102 */
1103 DWORD VIRTUAL_HandleFault( LPCVOID addr )
1104 {
1105 FILE_VIEW *view;
1106 DWORD ret = EXCEPTION_ACCESS_VIOLATION;
1107
1108 RtlEnterCriticalSection( &csVirtual );
1109 if ((view = VIRTUAL_FindView( addr )))
1110 {
1111 BYTE vprot = view->prot[((const char *)addr - (const char *)view->base) >> page_shift];
1112 void *page = (void *)((UINT_PTR)addr & ~page_mask);
1113 char *stack = NtCurrentTeb()->Tib.StackLimit;
1114 if (vprot & VPROT_GUARD)
1115 {
1116 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
1117 ret = STATUS_GUARD_PAGE_VIOLATION;
1118 }
1119 /* is it inside the stack guard page? */
1120 if (((const char *)addr >= stack) && ((const char *)addr < stack + (page_mask+1)))
1121 ret = STATUS_STACK_OVERFLOW;
1122 }
1123 RtlLeaveCriticalSection( &csVirtual );
1124 return ret;
1125 }
1126
1127 /***********************************************************************
1128 * VIRTUAL_HasMapping
1129 *
1130 * Check if the specified view has an associated file mapping.
1131 */
1132 BOOL VIRTUAL_HasMapping( LPCVOID addr )
1133 {
1134 FILE_VIEW *view;
1135 BOOL ret = FALSE;
1136
1137 RtlEnterCriticalSection( &csVirtual );
1138 if ((view = VIRTUAL_FindView( addr ))) ret = (view->mapping != 0);
1139 RtlLeaveCriticalSection( &csVirtual );
1140 return ret;
1141 }
1142
1143
1144 /***********************************************************************
1145 * VIRTUAL_UseLargeAddressSpace
1146 *
1147 * Increase the address space size for apps that support it.
1148 */
1149 void VIRTUAL_UseLargeAddressSpace(void)
1150 {
1151 if (user_space_limit >= ADDRESS_SPACE_LIMIT) return;
1152 RtlEnterCriticalSection( &csVirtual );
1153 remove_reserved_area( user_space_limit, (char *)ADDRESS_SPACE_LIMIT - (char *)user_space_limit );
1154 user_space_limit = ADDRESS_SPACE_LIMIT;
1155 RtlLeaveCriticalSection( &csVirtual );
1156 }
1157
1158
1159 /***********************************************************************
1160 * NtAllocateVirtualMemory (NTDLL.@)
1161 * ZwAllocateVirtualMemory (NTDLL.@)
1162 */
1163 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
1164 ULONG *size_ptr, ULONG type, ULONG protect )
1165 {
1166 void *base;
1167 BYTE vprot;
1168 DWORD size = *size_ptr;
1169 NTSTATUS status = STATUS_SUCCESS;
1170 struct file_view *view;
1171
1172 TRACE("%p %p %08lx %lx %08lx\n", process, *ret, size, type, protect );
1173
1174 if (!size) return STATUS_INVALID_PARAMETER;
1175
1176 if (!is_current_process( process ))
1177 {
1178 ERR("Unsupported on other process\n");
1179 return STATUS_ACCESS_DENIED;
1180 }
1181
1182 /* Round parameters to a page boundary */
1183
1184 if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
1185
1186 if (*ret)
1187 {
1188 if (type & MEM_RESERVE) /* Round down to 64k boundary */
1189 base = ROUND_ADDR( *ret, granularity_mask );
1190 else
1191 base = ROUND_ADDR( *ret, page_mask );
1192 size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1193
1194 /* disallow low 64k, wrap-around and kernel space */
1195 if (((char *)base <= (char *)granularity_mask) ||
1196 ((char *)base + size < (char *)base) ||
1197 is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
1198 return STATUS_INVALID_PARAMETER;
1199 }
1200 else
1201 {
1202 base = NULL;
1203 size = (size + page_mask) & ~page_mask;
1204 }
1205
1206 if (type & MEM_TOP_DOWN) {
1207 /* FIXME: MEM_TOP_DOWN allocates the largest possible address. */
1208 WARN("MEM_TOP_DOWN ignored\n");
1209 type &= ~MEM_TOP_DOWN;
1210 }
1211
1212 if (zero_bits)
1213 WARN("zero_bits %lu ignored\n", zero_bits);
1214
1215 /* Compute the alloc type flags */
1216
1217 if (!(type & MEM_SYSTEM))
1218 {
1219 if (!(type & (MEM_COMMIT | MEM_RESERVE)) || (type & ~(MEM_COMMIT | MEM_RESERVE)))
1220 {
1221 WARN("called with wrong alloc type flags (%08lx) !\n", type);
1222 return STATUS_INVALID_PARAMETER;
1223 }
1224 }
1225 vprot = VIRTUAL_GetProt( protect );
1226 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
1227
1228 /* Reserve the memory */
1229
1230 RtlEnterCriticalSection( &csVirtual );
1231
1232 if (type & MEM_SYSTEM)
1233 {
1234 if (type & MEM_IMAGE) vprot |= VPROT_IMAGE;
1235 status = create_view( &view, base, size, vprot | VPROT_COMMITTED );
1236 if (status == STATUS_SUCCESS)
1237 {
1238 view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
1239 base = view->base;
1240 }
1241 }
1242 else if ((type & MEM_RESERVE) || !base)
1243 {
1244 status = map_view( &view, base, size, vprot );
1245 if (status == STATUS_SUCCESS)
1246 {
1247 view->flags |= VFLAG_VALLOC;
1248 base = view->base;
1249 }
1250 }
1251 else /* commit the pages */
1252 {
1253 if (!(view = VIRTUAL_FindView( base )) ||
1254 ((char *)base + size > (char *)view->base + view->size)) status = STATUS_NOT_MAPPED_VIEW;
1255 else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1256 }
1257
1258 RtlLeaveCriticalSection( &csVirtual );
1259
1260 if (status == STATUS_SUCCESS)
1261 {
1262 *ret = base;
1263 *size_ptr = size;
1264 }
1265 return status;
1266 }
1267
1268
1269 /***********************************************************************
1270 * NtFreeVirtualMemory (NTDLL.@)
1271 * ZwFreeVirtualMemory (NTDLL.@)
1272 */
1273 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, ULONG *size_ptr, ULONG type )
1274 {
1275 FILE_VIEW *view;
1276 char *base;
1277 NTSTATUS status = STATUS_SUCCESS;
1278 LPVOID addr = *addr_ptr;
1279 DWORD size = *size_ptr;
1280
1281 TRACE("%p %p %08lx %lx\n", process, addr, size, type );
1282
1283 if (!is_current_process( process ))
1284 {
1285 ERR("Unsupported on other process\n");
1286 return STATUS_ACCESS_DENIED;
1287 }
1288
1289 /* Fix the parameters */
1290
1291 size = ROUND_SIZE( addr, size );
1292 base = ROUND_ADDR( addr, page_mask );
1293
1294 RtlEnterCriticalSection(&csVirtual);
1295
1296 if (!(view = VIRTUAL_FindView( base )) ||
1297 (base + size > (char *)view->base + view->size) ||
1298 !(view->flags & VFLAG_VALLOC))
1299 {
1300 status = STATUS_INVALID_PARAMETER;
1301 }
1302 else if (type & MEM_SYSTEM)
1303 {
1304 /* return the values that the caller should use to unmap the area */
1305 *addr_ptr = view->base;
1306 *size_ptr = view->size;
1307 view->flags |= VFLAG_SYSTEM;
1308 delete_view( view );
1309 }
1310 else if (type == MEM_RELEASE)
1311 {
1312 /* Free the pages */
1313
1314 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
1315 else
1316 {
1317 delete_view( view );
1318 *addr_ptr = base;
1319 *size_ptr = size;
1320 }
1321 }
1322 else if (type == MEM_DECOMMIT)
1323 {
1324 status = decommit_pages( view, base - (char *)view->base, size );
1325 if (status == STATUS_SUCCESS)
1326 {
1327 *addr_ptr = base;
1328 *size_ptr = size;
1329 }
1330 }
1331 else
1332 {
1333 WARN("called with wrong free type flags (%08lx) !\n", type);
1334 status = STATUS_INVALID_PARAMETER;
1335 }
1336
1337 RtlLeaveCriticalSection(&csVirtual);
1338 return status;
1339 }
1340
1341
1342 /***********************************************************************
1343 * NtProtectVirtualMemory (NTDLL.@)
1344 * ZwProtectVirtualMemory (NTDLL.@)
1345 */
1346 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, ULONG *size_ptr,
1347 ULONG new_prot, ULONG *old_prot )
1348 {
1349 FILE_VIEW *view;
1350 NTSTATUS status = STATUS_SUCCESS;
1351 char *base;
1352 UINT i;
1353 BYTE vprot, *p;
1354 DWORD prot, size = *size_ptr;
1355 LPVOID addr = *addr_ptr;
1356
1357 TRACE("%p %p %08lx %08lx\n", process, addr, size, new_prot );
1358
1359 if (!is_current_process( process ))
1360 {
1361 ERR("Unsupported on other process\n");
1362 return STATUS_ACCESS_DENIED;
1363 }
1364
1365 /* Fix the parameters */
1366
1367 size = ROUND_SIZE( addr, size );
1368 base = ROUND_ADDR( addr, page_mask );
1369
1370 RtlEnterCriticalSection( &csVirtual );
1371
1372 if (!(view = VIRTUAL_FindView( base )) || (base + size > (char *)view->base + view->size))
1373 {
1374 status = STATUS_INVALID_PARAMETER;
1375 }
1376 else
1377 {
1378 /* Make sure all the pages are committed */
1379
1380 p = view->prot + ((base - (char *)view->base) >> page_shift);
1381 VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1382 for (i = size >> page_shift; i; i--, p++)
1383 {
1384 if (!(*p & VPROT_COMMITTED))
1385 {
1386 status = STATUS_NOT_COMMITTED;
1387 break;
1388 }
1389 }
1390 if (!i)
1391 {
1392 if (old_prot) *old_prot = prot;
1393 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1394 if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1395 }
1396 }
1397 RtlLeaveCriticalSection( &csVirtual );
1398
1399 if (status == STATUS_SUCCESS)
1400 {
1401 *addr_ptr = base;
1402 *size_ptr = size;
1403 }
1404 return status;
1405 }
1406
1407
1408 /***********************************************************************
1409 * NtQueryVirtualMemory (NTDLL.@)
1410 * ZwQueryVirtualMemory (NTDLL.@)
1411 */
1412 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
1413 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
1414 ULONG len, ULONG *res_len )
1415 {
1416 FILE_VIEW *view;
1417 char *base, *alloc_base = 0;
1418 struct list *ptr;
1419 UINT size = 0;
1420 MEMORY_BASIC_INFORMATION *info = buffer;
1421
1422 if (info_class != MemoryBasicInformation)
1423 {
1424 FIXME("(%p, %p, %d, %p, %ld, %p) Unimplemented information class\n", process, addr,
1425 info_class, buffer, len, res_len);
1426 return STATUS_INVALID_INFO_CLASS;
1427 }
1428 if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
1429 return STATUS_WORKING_SET_LIMIT_RANGE;
1430
1431 if (!is_current_process( process ))
1432 {
1433 ERR("Unsupported on other process\n");
1434 return STATUS_ACCESS_DENIED;
1435 }
1436
1437 base = ROUND_ADDR( addr, page_mask );
1438
1439 /* Find the view containing the address */
1440
1441 RtlEnterCriticalSection(&csVirtual);
1442 ptr = list_head( &views_list );
1443 for (;;)
1444 {
1445 if (!ptr)
1446 {
1447 /* make the address space end at the user limit, except if
1448 * the last view was mapped beyond that */
1449 if (alloc_base < (char *)user_space_limit)
1450 {
1451 if (user_space_limit && base >= (char *)user_space_limit)
1452 {
1453 RtlLeaveCriticalSection( &csVirtual );
1454 return STATUS_WORKING_SET_LIMIT_RANGE;
1455 }
1456 size = (char *)user_space_limit - alloc_base;
1457 }
1458 else size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1459 view = NULL;
1460 break;
1461 }
1462 view = LIST_ENTRY( ptr, struct file_view, entry );
1463 if ((char *)view->base > base)
1464 {
1465 size = (char *)view->base - alloc_base;
1466 view = NULL;
1467 break;
1468 }
1469 if ((char *)view->base + view->size > base)
1470 {
1471 alloc_base = view->base;
1472 size = view->size;
1473 break;
1474 }
1475 alloc_base = (char *)view->base + view->size;
1476 ptr = list_next( &views_list, ptr );
1477 }
1478
1479 /* Fill the info structure */
1480
1481 if (!view)
1482 {
1483 info->State = MEM_FREE;
1484 info->Protect = 0;
1485 info->AllocationProtect = 0;
1486 info->Type = 0;
1487 }
1488 else
1489 {
1490 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1491 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1492 for (size = base - alloc_base; size < view->size; size += page_mask+1)
1493 if (view->prot[size >> page_shift] != vprot) break;
1494 VIRTUAL_GetWin32Prot( view->protect, &info->AllocationProtect, NULL );
1495 if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
1496 else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
1497 else info->Type = MEM_MAPPED;
1498 }
1499 RtlLeaveCriticalSection(&csVirtual);
1500
1501 info->BaseAddress = (LPVOID)base;
1502 info->AllocationBase = (LPVOID)alloc_base;
1503 info->RegionSize = size - (base - alloc_base);
1504 if (res_len) *res_len = sizeof(*info);
1505 return STATUS_SUCCESS;
1506 }
1507
1508
1509 /***********************************************************************
1510 * NtLockVirtualMemory (NTDLL.@)
1511 * ZwLockVirtualMemory (NTDLL.@)
1512 */
1513 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, ULONG *size, ULONG unknown )
1514 {
1515 if (!is_current_process( process ))
1516 {
1517 ERR("Unsupported on other process\n");
1518 return STATUS_ACCESS_DENIED;
1519 }
1520 return STATUS_SUCCESS;
1521 }
1522
1523
1524 /***********************************************************************
1525 * NtUnlockVirtualMemory (NTDLL.@)
1526 * ZwUnlockVirtualMemory (NTDLL.@)
1527 */
1528 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, ULONG *size, ULONG unknown )
1529 {
1530 if (!is_current_process( process ))
1531 {
1532 ERR("Unsupported on other process\n");
1533 return STATUS_ACCESS_DENIED;
1534 }
1535 return STATUS_SUCCESS;
1536 }
1537
1538
1539 /***********************************************************************
1540 * NtCreateSection (NTDLL.@)
1541 * ZwCreateSection (NTDLL.@)
1542 */
1543 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
1544 const LARGE_INTEGER *size, ULONG protect,
1545 ULONG sec_flags, HANDLE file )
1546 {
1547 NTSTATUS ret;
1548 BYTE vprot;
1549 DWORD len = (attr && attr->ObjectName) ? attr->ObjectName->Length : 0;
1550
1551 /* Check parameters */
1552
1553 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1554
1555 vprot = VIRTUAL_GetProt( protect );
1556 if (sec_flags & SEC_RESERVE)
1557 {
1558 if (file) return STATUS_INVALID_PARAMETER;
1559 }
1560 else vprot |= VPROT_COMMITTED;
1561 if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1562 if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
1563
1564 /* Create the server object */
1565
1566 SERVER_START_REQ( create_mapping )
1567 {
1568 req->file_handle = file;
1569 req->size_high = size ? size->u.HighPart : 0;
1570 req->size_low = size ? size->u.LowPart : 0;
1571 req->protect = vprot;
1572 req->access = access;
1573 req->inherit = (attr && (attr->Attributes & OBJ_INHERIT) != 0);
1574 if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
1575 ret = wine_server_call( req );
1576 *handle = reply->handle;
1577 }
1578 SERVER_END_REQ;
1579 return ret;
1580 }
1581
1582
1583 /***********************************************************************
1584 * NtOpenSection (NTDLL.@)
1585 * ZwOpenSection (NTDLL.@)
1586 */
1587 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
1588 {
1589 NTSTATUS ret;
1590 DWORD len = attr->ObjectName->Length;
1591
1592 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1593
1594 SERVER_START_REQ( open_mapping )
1595 {
1596 req->access = access;
1597 req->inherit = (attr->Attributes & OBJ_INHERIT) != 0;
1598 wine_server_add_data( req, attr->ObjectName->Buffer, len );
1599 if (!(ret = wine_server_call( req ))) *handle = reply->handle;
1600 }
1601 SERVER_END_REQ;
1602 return ret;
1603 }
1604
1605
1606 /***********************************************************************
1607 * NtMapViewOfSection (NTDLL.@)
1608 * ZwMapViewOfSection (NTDLL.@)
1609 */
1610 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
1611 ULONG commit_size, const LARGE_INTEGER *offset_ptr, ULONG *size_ptr,
1612 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
1613 {
1614 IO_STATUS_BLOCK io;
1615 FILE_FS_DEVICE_INFORMATION device_info;
1616 NTSTATUS res;
1617 UINT size = 0;
1618 int unix_handle = -1;
1619 int prot;
1620 void *base;
1621 struct file_view *view;
1622 DWORD size_low, size_high, header_size, shared_size;
1623 HANDLE shared_file;
1624 BOOL removable = FALSE;
1625 LARGE_INTEGER offset;
1626
1627 offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
1628
1629 TRACE("handle=%p process=%p addr=%p off=%lx%08lx size=%x access=%lx\n",
1630 handle, process, *addr_ptr, offset.u.HighPart, offset.u.LowPart, size, protect );
1631
1632 if (!is_current_process( process ))
1633 {
1634 ERR("Unsupported on other process\n");
1635 return STATUS_ACCESS_DENIED;
1636 }
1637
1638 /* Check parameters */
1639
1640 if ((offset.u.LowPart & granularity_mask) ||
1641 (*addr_ptr && ((UINT_PTR)*addr_ptr & granularity_mask)))
1642 return STATUS_INVALID_PARAMETER;
1643
1644 SERVER_START_REQ( get_mapping_info )
1645 {
1646 req->handle = handle;
1647 res = wine_server_call( req );
1648 prot = reply->protect;
1649 base = reply->base;
1650 size_low = reply->size_low;
1651 size_high = reply->size_high;
1652 header_size = reply->header_size;
1653 shared_file = reply->shared_file;
1654 shared_size = reply->shared_size;
1655 }
1656 SERVER_END_REQ;
1657 if (res) return res;
1658
1659 if ((res = wine_server_handle_to_fd( handle, 0, &unix_handle, NULL ))) return res;
1660
1661 if (NtQueryVolumeInformationFile( handle, &io, &device_info, sizeof(device_info),
1662 FileFsDeviceInformation ) == STATUS_SUCCESS)
1663 removable = device_info.Characteristics & FILE_REMOVABLE_MEDIA;
1664
1665 if (prot & VPROT_IMAGE)
1666 {
1667 if (shared_file)
1668 {
1669 int shared_fd;
1670
1671 if ((res = wine_server_handle_to_fd( shared_file, GENERIC_READ, &shared_fd,
1672 NULL ))) goto done;
1673 res = map_image( handle, unix_handle, base, size_low, header_size,
1674 shared_fd, removable, addr_ptr );
1675 wine_server_release_fd( shared_file, shared_fd );
1676 NtClose( shared_file );
1677 }
1678 else
1679 {
1680 res = map_image( handle, unix_handle, base, size_low, header_size,
1681 -1, removable, addr_ptr );
1682 }
1683 wine_server_release_fd( handle, unix_handle );
1684 if (!res) *size_ptr = size_low;
1685 return res;
1686 }
1687
1688 if (size_high)
1689 ERR("Sizes larger than 4Gb not supported\n");
1690
1691 if ((offset.u.LowPart >= size_low) ||
1692 (*size_ptr > size_low - offset.u.LowPart))
1693 {
1694 res = STATUS_INVALID_PARAMETER;
1695 goto done;
1696 }
1697 if (*size_ptr) size = ROUND_SIZE( offset.u.LowPart, *size_ptr );
1698 else size = size_low - offset.u.LowPart;
1699
1700 switch(protect)
1701 {
1702 case PAGE_NOACCESS:
1703 break;
1704 case PAGE_READWRITE:
1705 case PAGE_EXECUTE_READWRITE:
1706 if (!(prot & VPROT_WRITE))
1707 {
1708 res = STATUS_INVALID_PARAMETER;
1709 goto done;
1710 }
1711 removable = FALSE;
1712 /* fall through */
1713 case PAGE_READONLY:
1714 case PAGE_WRITECOPY:
1715 case PAGE_EXECUTE:
1716 case PAGE_EXECUTE_READ:
1717 case PAGE_EXECUTE_WRITECOPY:
1718 if (prot & VPROT_READ) break;
1719 /* fall through */
1720 default:
1721 res = STATUS_INVALID_PARAMETER;
1722 goto done;
1723 }
1724
1725 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1726 * which has a view of this mapping commits some pages, they will
1727 * appear commited in all other processes, which have the same
1728 * view created. Since we don`t support this yet, we create the
1729 * whole mapping commited.
1730 */
1731 prot |= VPROT_COMMITTED;
1732
1733 /* Reserve a properly aligned area */
1734
1735 RtlEnterCriticalSection( &csVirtual );
1736
1737 res = map_view( &view, *addr_ptr, size, prot );
1738 if (res)
1739 {
1740 RtlLeaveCriticalSection( &csVirtual );
1741 goto done;
1742 }
1743
1744 /* Map the file */
1745
1746 TRACE("handle=%p size=%x offset=%lx%08lx\n",
1747 handle, size, offset.u.HighPart, offset.u.LowPart );
1748
1749 res = map_file_into_view( view, unix_handle, 0, size, offset.QuadPart, prot, removable );
1750 if (res == STATUS_SUCCESS)
1751 {
1752 if (!removable) /* don't keep handle open on removable media */
1753 NtDuplicateObject( NtCurrentProcess(), handle,
1754 NtCurrentProcess(), &view->mapping,
1755 0, 0, DUPLICATE_SAME_ACCESS );
1756
1757 *addr_ptr = view->base;
1758 *size_ptr = size;
1759 }
1760 else
1761 {
1762 ERR( "map_file_into_view %p %x %lx%08lx failed\n",
1763 view->base, size, offset.u.HighPart, offset.u.LowPart );
1764 delete_view( view );
1765 }
1766
1767 RtlLeaveCriticalSection( &csVirtual );
1768
1769 done:
1770 wine_server_release_fd( handle, unix_handle );
1771 return res;
1772 }
1773
1774
1775 /***********************************************************************
1776 * NtUnmapViewOfSection (NTDLL.@)
1777 * ZwUnmapViewOfSection (NTDLL.@)
1778 */
1779 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
1780 {
1781 FILE_VIEW *view;
1782 NTSTATUS status = STATUS_INVALID_PARAMETER;
1783 void *base = ROUND_ADDR( addr, page_mask );
1784
1785 if (!is_current_process( process ))
1786 {
1787 ERR("Unsupported on other process\n");
1788 return STATUS_ACCESS_DENIED;
1789 }
1790 RtlEnterCriticalSection( &csVirtual );
1791 if ((view = VIRTUAL_FindView( base )) && (base == view->base))
1792 {
1793 delete_view( view );
1794 status = STATUS_SUCCESS;
1795 }
1796 RtlLeaveCriticalSection( &csVirtual );
1797 return status;
1798 }
1799
1800
1801 /***********************************************************************
1802 * NtFlushVirtualMemory (NTDLL.@)
1803 * ZwFlushVirtualMemory (NTDLL.@)
1804 */
1805 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
1806 ULONG *size_ptr, ULONG unknown )
1807 {
1808 FILE_VIEW *view;
1809 NTSTATUS status = STATUS_SUCCESS;
1810 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
1811
1812 if (!is_current_process( process ))
1813 {
1814 ERR("Unsupported on other process\n");
1815 return STATUS_ACCESS_DENIED;
1816 }
1817 RtlEnterCriticalSection( &csVirtual );
1818 if (!(view = VIRTUAL_FindView( addr ))) status = STATUS_INVALID_PARAMETER;
1819 else
1820 {
1821 if (!*size_ptr) *size_ptr = view->size;
1822 *addr_ptr = addr;
1823 if (msync( addr, *size_ptr, MS_SYNC )) status = STATUS_NOT_MAPPED_DATA;
1824 }
1825 RtlLeaveCriticalSection( &csVirtual );
1826 return status;
1827 }
1828
1829
1830 /***********************************************************************
1831 * NtReadVirtualMemory (NTDLL.@)
1832 * ZwReadVirtualMemory (NTDLL.@)
1833 */
1834 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
1835 SIZE_T size, SIZE_T *bytes_read )
1836 {
1837 NTSTATUS status;
1838
1839 SERVER_START_REQ( read_process_memory )
1840 {
1841 req->handle = process;
1842 req->addr = (void *)addr;
1843 wine_server_set_reply( req, buffer, size );
1844 if ((status = wine_server_call( req ))) size = 0;
1845 }
1846 SERVER_END_REQ;
1847 if (bytes_read) *bytes_read = size;
1848 return status;
1849 }
1850
1851
1852 /***********************************************************************
1853 * NtWriteVirtualMemory (NTDLL.@)
1854 * ZwWriteVirtualMemory (NTDLL.@)
1855 */
1856 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
1857 SIZE_T size, SIZE_T *bytes_written )
1858 {
1859 static const unsigned int zero;
1860 unsigned int first_offset, last_offset, first_mask, last_mask;
1861 NTSTATUS status;
1862
1863 if (!size) return STATUS_INVALID_PARAMETER;
1864
1865 /* compute the mask for the first int */
1866 first_mask = ~0;
1867 first_offset = (unsigned int)addr % sizeof(int);
1868 memset( &first_mask, 0, first_offset );
1869
1870 /* compute the mask for the last int */
1871 last_offset = (size + first_offset) % sizeof(int);
1872 last_mask = 0;
1873 memset( &last_mask, 0xff, last_offset ? last_offset : sizeof(int) );
1874
1875 SERVER_START_REQ( write_process_memory )
1876 {
1877 req->handle = process;
1878 req->addr = (char *)addr - first_offset;
1879 req->first_mask = first_mask;
1880 req->last_mask = last_mask;
1881 if (first_offset) wine_server_add_data( req, &zero, first_offset );
1882 wine_server_add_data( req, buffer, size );
1883 if (last_offset) wine_server_add_data( req, &zero, sizeof(int) - last_offset );
1884
1885 if ((status = wine_server_call( req ))) size = 0;
1886 }
1887 SERVER_END_REQ;
1888 if (bytes_written) *bytes_written = size;
1889 return status;
1890 }
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