?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Const correctness.
[wine.git] / dlls / ntdll / virtual.c
blob3d9128a54b8675bf1c3d9c9ea124384ca4cf5754
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 HANDLERPROC handlerProc; /* Fault handler */
72 LPVOID handlerArg; /* Fault handler argument */
73 BYTE flags; /* Allocation flags (VFLAG_*) */
74 BYTE protect; /* Protection for all pages at allocation time */
75 BYTE prot[1]; /* Protection byte for each page */
76 } FILE_VIEW;
77
78 /* Per-view flags */
79 #define VFLAG_SYSTEM 0x01 /* system view (underlying mmap not under our control) */
80 #define VFLAG_VALLOC 0x02 /* allocated by VirtualAlloc */
81
82 /* Conversion from VPROT_* to Win32 flags */
83 static const BYTE VIRTUAL_Win32Flags[16] =
84 {
85 PAGE_NOACCESS, /* 0 */
86 PAGE_READONLY, /* READ */
87 PAGE_READWRITE, /* WRITE */
88 PAGE_READWRITE, /* READ | WRITE */
89 PAGE_EXECUTE, /* EXEC */
90 PAGE_EXECUTE_READ, /* READ | EXEC */
91 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
92 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
93 PAGE_WRITECOPY, /* WRITECOPY */
94 PAGE_WRITECOPY, /* READ | WRITECOPY */
95 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
96 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
97 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
98 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
99 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
100 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
101 };
102
103 static struct list views_list = LIST_INIT(views_list);
104
105 static CRITICAL_SECTION csVirtual;
106 static CRITICAL_SECTION_DEBUG critsect_debug =
107 {
108 0, 0, &csVirtual,
109 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
110 0, 0, { 0, (DWORD)(__FILE__ ": csVirtual") }
111 };
112 static CRITICAL_SECTION csVirtual = { &critsect_debug, -1, 0, 0, 0, 0 };
113
114 #ifdef __i386__
115 /* These are always the same on an i386, and it will be faster this way */
116 # define page_mask 0xfff
117 # define page_shift 12
118 # define page_size 0x1000
119 /* Note: these are Windows limits, you cannot change them. */
120 # define ADDRESS_SPACE_LIMIT ((void *)0xc0000000) /* top of the total available address space */
121 # define USER_SPACE_LIMIT ((void *)0x80000000) /* top of the user address space */
122 #else
123 static UINT page_shift;
124 static UINT page_mask;
125 static UINT page_size;
126 # define ADDRESS_SPACE_LIMIT 0 /* no limit needed on other platforms */
127 # define USER_SPACE_LIMIT 0 /* no limit needed on other platforms */
128 #endif /* __i386__ */
129 #define granularity_mask 0xffff /* Allocation granularity (usually 64k) */
130
131 #define ROUND_ADDR(addr,mask) \
132 ((void *)((UINT_PTR)(addr) & ~(mask)))
133
134 #define ROUND_SIZE(addr,size) \
135 (((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
136
137 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
138 if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
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 list *ptr;
197
198 DPRINTF( "\nDump of all virtual memory views:\n\n" );
199 RtlEnterCriticalSection(&csVirtual);
200 LIST_FOR_EACH( ptr, &views_list )
201 {
202 VIRTUAL_DumpView( LIST_ENTRY( ptr, struct file_view, entry ) );
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 * RETURNS
214 * View: Success
215 * NULL: Failure
216 */
217 static struct file_view *VIRTUAL_FindView( const void *addr ) /* [in] Address */
218 {
219 struct list *ptr;
220
221 LIST_FOR_EACH( ptr, &views_list )
222 {
223 struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
224 if (view->base > addr) break;
225 if ((const char*)view->base + view->size > (const char*)addr) return view;
226 }
227 return NULL;
228 }
229
230
231 /***********************************************************************
232 * find_view_range
233 *
234 * Find the first view overlapping at least part of the specified range.
235 * The csVirtual section must be held by caller.
236 */
237 static struct file_view *find_view_range( const void *addr, size_t size )
238 {
239 struct list *ptr;
240
241 LIST_FOR_EACH( ptr, &views_list )
242 {
243 struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
244 if ((const char *)view->base >= (const char *)addr + size) break;
245 if ((const char *)view->base + view->size > (const char *)addr) return view;
246 }
247 return NULL;
248 }
249
250
251 /***********************************************************************
252 * add_reserved_area
253 *
254 * Add a reserved area to the list maintained by libwine.
255 * The csVirtual section must be held by caller.
256 */
257 static void add_reserved_area( void *addr, size_t size )
258 {
259 TRACE( "adding %p-%p\n", addr, (char *)addr + size );
260
261 if (addr < USER_SPACE_LIMIT)
262 {
263 /* unmap the part of the area that is below the limit */
264 assert( (char *)addr + size > (char *)USER_SPACE_LIMIT );
265 munmap( addr, (char *)USER_SPACE_LIMIT - (char *)addr );
266 size -= (char *)USER_SPACE_LIMIT - (char *)addr;
267 addr = USER_SPACE_LIMIT;
268 }
269 /* blow away existing mappings */
270 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
271 wine_mmap_add_reserved_area( addr, size );
272 }
273
274
275 /***********************************************************************
276 * is_beyond_limit
277 *
278 * Check if an address range goes beyond a given limit.
279 */
280 static inline int is_beyond_limit( void *addr, size_t size, void *limit )
281 {
282 return (limit && (addr >= limit || (char *)addr + size > (char *)limit));
283 }
284
285
286 /***********************************************************************
287 * unmap_area
288 *
289 * Unmap an area, or simply replace it by an empty mapping if it is
290 * in a reserved area. The csVirtual section must be held by caller.
291 */
292 static inline void unmap_area( void *addr, size_t size )
293 {
294 if (wine_mmap_is_in_reserved_area( addr, size ))
295 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
296 else
297 munmap( addr, size );
298 }
299
300
301 /***********************************************************************
302 * delete_view
303 *
304 * Deletes a view. The csVirtual section must be held by caller.
305 */
306 static void delete_view( struct file_view *view ) /* [in] View */
307 {
308 if (!(view->flags & VFLAG_SYSTEM)) unmap_area( view->base, view->size );
309 list_remove( &view->entry );
310 if (view->mapping) NtClose( view->mapping );
311 free( view );
312 }
313
314
315 /***********************************************************************
316 * create_view
317 *
318 * Create a view. The csVirtual section must be held by caller.
319 */
320 static NTSTATUS create_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
321 {
322 struct file_view *view;
323 struct list *ptr;
324
325 assert( !((unsigned int)base & page_mask) );
326 assert( !(size & page_mask) );
327
328 /* Create the view structure */
329
330 if (!(view = malloc( sizeof(*view) + (size >> page_shift) - 1 ))) return STATUS_NO_MEMORY;
331
332 view->base = base;
333 view->size = size;
334 view->flags = 0;
335 view->mapping = 0;
336 view->protect = vprot;
337 view->handlerProc = NULL;
338 memset( view->prot, vprot, size >> page_shift );
339
340 /* Insert it in the linked list */
341
342 LIST_FOR_EACH( ptr, &views_list )
343 {
344 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
345 if (next->base > base) break;
346 }
347 list_add_before( ptr, &view->entry );
348
349 /* Check for overlapping views. This can happen if the previous view
350 * was a system view that got unmapped behind our back. In that case
351 * we recover by simply deleting it. */
352
353 if ((ptr = list_prev( &views_list, &view->entry )) != NULL)
354 {
355 struct file_view *prev = LIST_ENTRY( ptr, struct file_view, entry );
356 if ((char *)prev->base + prev->size > (char *)base)
357 {
358 TRACE( "overlapping prev view %p-%p for %p-%p\n",
359 prev->base, (char *)prev->base + prev->size,
360 base, (char *)base + view->size );
361 assert( prev->flags & VFLAG_SYSTEM );
362 delete_view( prev );
363 }
364 }
365 if ((ptr = list_next( &views_list, &view->entry )) != NULL)
366 {
367 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
368 if ((char *)base + view->size > (char *)next->base)
369 {
370 TRACE( "overlapping next view %p-%p for %p-%p\n",
371 next->base, (char *)next->base + next->size,
372 base, (char *)base + view->size );
373 assert( next->flags & VFLAG_SYSTEM );
374 delete_view( next );
375 }
376 }
377
378 *view_ret = view;
379 VIRTUAL_DEBUG_DUMP_VIEW( view );
380 return STATUS_SUCCESS;
381 }
382
383
384 /***********************************************************************
385 * VIRTUAL_GetUnixProt
386 *
387 * Convert page protections to protection for mmap/mprotect.
388 */
389 static int VIRTUAL_GetUnixProt( BYTE vprot )
390 {
391 int prot = 0;
392 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
393 {
394 if (vprot & VPROT_READ) prot |= PROT_READ;
395 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
396 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
397 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
398 }
399 return prot;
400 }
401
402
403 /***********************************************************************
404 * VIRTUAL_GetWin32Prot
405 *
406 * Convert page protections to Win32 flags.
407 *
408 * RETURNS
409 * None
410 */
411 static void VIRTUAL_GetWin32Prot(
412 BYTE vprot, /* [in] Page protection flags */
413 DWORD *protect, /* [out] Location to store Win32 protection flags */
414 DWORD *state ) /* [out] Location to store mem state flag */
415 {
416 if (protect) {
417 *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
418 /* if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
419 if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
420
421 if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
422 }
423
424 if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
425 }
426
427
428 /***********************************************************************
429 * VIRTUAL_GetProt
430 *
431 * Build page protections from Win32 flags.
432 *
433 * RETURNS
434 * Value of page protection flags
435 */
436 static BYTE VIRTUAL_GetProt( DWORD protect ) /* [in] Win32 protection flags */
437 {
438 BYTE vprot;
439
440 switch(protect & 0xff)
441 {
442 case PAGE_READONLY:
443 vprot = VPROT_READ;
444 break;
445 case PAGE_READWRITE:
446 vprot = VPROT_READ | VPROT_WRITE;
447 break;
448 case PAGE_WRITECOPY:
449 /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
450 * that the hFile must have been opened with GENERIC_READ and
451 * GENERIC_WRITE access. This is WRONG as tests show that you
452 * only need GENERIC_READ access (at least for Win9x,
453 * FIXME: what about NT?). Thus, we don't put VPROT_WRITE in
454 * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
455 */
456 vprot = VPROT_READ | VPROT_WRITECOPY;
457 break;
458 case PAGE_EXECUTE:
459 vprot = VPROT_EXEC;
460 break;
461 case PAGE_EXECUTE_READ:
462 vprot = VPROT_EXEC | VPROT_READ;
463 break;
464 case PAGE_EXECUTE_READWRITE:
465 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
466 break;
467 case PAGE_EXECUTE_WRITECOPY:
468 /* See comment for PAGE_WRITECOPY above */
469 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
470 break;
471 case PAGE_NOACCESS:
472 default:
473 vprot = 0;
474 break;
475 }
476 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
477 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
478 return vprot;
479 }
480
481
482 /***********************************************************************
483 * VIRTUAL_SetProt
484 *
485 * Change the protection of a range of pages.
486 *
487 * RETURNS
488 * TRUE: Success
489 * FALSE: Failure
490 */
491 static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
492 void *base, /* [in] Starting address */
493 UINT size, /* [in] Size in bytes */
494 BYTE vprot ) /* [in] Protections to use */
495 {
496 TRACE("%p-%p %s\n",
497 base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
498
499 if (mprotect( base, size, VIRTUAL_GetUnixProt(vprot) ))
500 return FALSE; /* FIXME: last error */
501
502 memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
503 vprot, size >> page_shift );
504 VIRTUAL_DEBUG_DUMP_VIEW( view );
505 return TRUE;
506 }
507
508
509 /***********************************************************************
510 * map_view
511 *
512 * Create a view and mmap the corresponding memory area.
513 * The csVirtual section must be held by caller.
514 */
515 static NTSTATUS map_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
516 {
517 void *ptr;
518 NTSTATUS status;
519
520 if (base)
521 {
522 if (is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
523 return STATUS_WORKING_SET_LIMIT_RANGE;
524
525 switch (wine_mmap_is_in_reserved_area( base, size ))
526 {
527 case -1: /* partially in a reserved area */
528 return STATUS_CONFLICTING_ADDRESSES;
529
530 case 0: /* not in a reserved area, do a normal allocation */
531 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
532 {
533 if (errno == ENOMEM) return STATUS_NO_MEMORY;
534 return STATUS_INVALID_PARAMETER;
535 }
536 if (ptr != base)
537 {
538 /* We couldn't get the address we wanted */
539 if (is_beyond_limit( ptr, size, USER_SPACE_LIMIT )) add_reserved_area( ptr, size );
540 else munmap( ptr, size );
541 return STATUS_CONFLICTING_ADDRESSES;
542 }
543 break;
544
545 default:
546 case 1: /* in a reserved area, make sure the address is available */
547 if (find_view_range( base, size )) return STATUS_CONFLICTING_ADDRESSES;
548 /* replace the reserved area by our mapping */
549 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED )) != base)
550 return STATUS_INVALID_PARAMETER;
551 break;
552 }
553 }
554 else
555 {
556 size_t view_size = size + granularity_mask + 1;
557
558 for (;;)
559 {
560 if ((ptr = wine_anon_mmap( NULL, view_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
561 {
562 if (errno == ENOMEM) return STATUS_NO_MEMORY;
563 return STATUS_INVALID_PARAMETER;
564 }
565 /* if we got something beyond the user limit, unmap it and retry */
566 if (is_beyond_limit( ptr, view_size, USER_SPACE_LIMIT )) add_reserved_area( ptr, view_size );
567 else break;
568 }
569
570 /* Release the extra memory while keeping the range
571 * starting on the granularity boundary. */
572 if ((unsigned int)ptr & granularity_mask)
573 {
574 unsigned int extra = granularity_mask + 1 - ((unsigned int)ptr & granularity_mask);
575 munmap( ptr, extra );
576 ptr = (char *)ptr + extra;
577 view_size -= extra;
578 }
579 if (view_size > size)
580 munmap( (char *)ptr + size, view_size - size );
581 }
582
583 status = create_view( view_ret, ptr, size, vprot );
584 if (status != STATUS_SUCCESS) unmap_area( ptr, size );
585 return status;
586 }
587
588
589 /***********************************************************************
590 * unaligned_mmap
591 *
592 * Linux kernels before 2.4.x can support non page-aligned offsets, as
593 * long as the offset is aligned to the filesystem block size. This is
594 * a big performance gain so we want to take advantage of it.
595 *
596 * However, when we use 64-bit file support this doesn't work because
597 * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
598 * in that it rounds unaligned offsets down to a page boundary. For
599 * these reasons we do a direct system call here.
600 */
601 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
602 unsigned int flags, int fd, off_t offset )
603 {
604 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
605 if (!(offset >> 32) && (offset & page_mask))
606 {
607 int ret;
608
609 struct
610 {
611 void *addr;
612 unsigned int length;
613 unsigned int prot;
614 unsigned int flags;
615 unsigned int fd;
616 unsigned int offset;
617 } args;
618
619 args.addr = addr;
620 args.length = length;
621 args.prot = prot;
622 args.flags = flags;
623 args.fd = fd;
624 args.offset = offset;
625
626 __asm__ __volatile__("push %%ebx\n\t"
627 "movl %2,%%ebx\n\t"
628 "int $0x80\n\t"
629 "popl %%ebx"
630 : "=a" (ret)
631 : "0" (90), /* SYS_mmap */
632 "g" (&args)
633 : "memory" );
634 if (ret < 0 && ret > -4096)
635 {
636 errno = -ret;
637 ret = -1;
638 }
639 return (void *)ret;
640 }
641 #endif
642 return mmap( addr, length, prot, flags, fd, offset );
643 }
644
645
646 /***********************************************************************
647 * map_file_into_view
648 *
649 * Wrapper for mmap() to map a file into a view, falling back to read if mmap fails.
650 * The csVirtual section must be held by caller.
651 */
652 static NTSTATUS map_file_into_view( struct file_view *view, int fd, size_t start, size_t size,
653 off_t offset, BYTE vprot, BOOL removable )
654 {
655 void *ptr;
656 int prot = VIRTUAL_GetUnixProt( vprot );
657 BOOL shared_write = (vprot & VPROT_WRITE) != 0;
658
659 assert( start < view->size );
660 assert( start + size <= view->size );
661
662 /* only try mmap if media is not removable (or if we require write access) */
663 if (!removable || shared_write)
664 {
665 int flags = MAP_FIXED | (shared_write ? MAP_SHARED : MAP_PRIVATE);
666
667 if (unaligned_mmap( (char *)view->base + start, size, prot, flags, fd, offset ) != (void *)-1)
668 goto done;
669
670 /* mmap() failed; if this is because the file offset is not */
671 /* page-aligned (EINVAL), or because the underlying filesystem */
672 /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
673 if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return FILE_GetNtStatus();
674 if (shared_write) return FILE_GetNtStatus(); /* we cannot fake shared write mappings */
675 }
676
677 /* Reserve the memory with an anonymous mmap */
678 ptr = wine_anon_mmap( (char *)view->base + start, size, PROT_READ | PROT_WRITE, MAP_FIXED );
679 if (ptr == (void *)-1) return FILE_GetNtStatus();
680 /* Now read in the file */
681 pread( fd, ptr, size, offset );
682 if (prot != (PROT_READ|PROT_WRITE)) mprotect( ptr, size, prot ); /* Set the right protection */
683 done:
684 memset( view->prot + (start >> page_shift), vprot, size >> page_shift );
685 return STATUS_SUCCESS;
686 }
687
688
689 /***********************************************************************
690 * decommit_view
691 *
692 * Decommit some pages of a given view.
693 * The csVirtual section must be held by caller.
694 */
695 static NTSTATUS decommit_pages( struct file_view *view, size_t start, size_t size )
696 {
697 if (wine_anon_mmap( (char *)view->base + start, size, PROT_NONE, MAP_FIXED ) != (void *)-1)
698 {
699 BYTE *p = view->prot + (start >> page_shift);
700 size >>= page_shift;
701 while (size--) *p++ &= ~VPROT_COMMITTED;
702 return STATUS_SUCCESS;
703 }
704 return FILE_GetNtStatus();
705 }
706
707
708 /***********************************************************************
709 * do_relocations
710 *
711 * Apply the relocations to a mapped PE image
712 */
713 static int do_relocations( char *base, const IMAGE_DATA_DIRECTORY *dir,
714 int delta, DWORD total_size )
715 {
716 IMAGE_BASE_RELOCATION *rel;
717
718 TRACE_(module)( "relocating from %p-%p to %p-%p\n",
719 base - delta, base - delta + total_size, base, base + total_size );
720
721 for (rel = (IMAGE_BASE_RELOCATION *)(base + dir->VirtualAddress);
722 ((char *)rel < base + dir->VirtualAddress + dir->Size) && rel->SizeOfBlock;
723 rel = (IMAGE_BASE_RELOCATION*)((char*)rel + rel->SizeOfBlock) )
724 {
725 char *page = base + rel->VirtualAddress;
726 WORD *TypeOffset = (WORD *)(rel + 1);
727 int i, count = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(*TypeOffset);
728
729 if (!count) continue;
730
731 /* sanity checks */
732 if ((char *)rel + rel->SizeOfBlock > base + dir->VirtualAddress + dir->Size ||
733 page > base + total_size)
734 {
735 ERR_(module)("invalid relocation %p,%lx,%ld at %p,%lx,%lx\n",
736 rel, rel->VirtualAddress, rel->SizeOfBlock,
737 base, dir->VirtualAddress, dir->Size );
738 return 0;
739 }
740
741 TRACE_(module)("%ld relocations for page %lx\n", rel->SizeOfBlock, rel->VirtualAddress);
742
743 /* patching in reverse order */
744 for (i = 0 ; i < count; i++)
745 {
746 int offset = TypeOffset[i] & 0xFFF;
747 int type = TypeOffset[i] >> 12;
748 switch(type)
749 {
750 case IMAGE_REL_BASED_ABSOLUTE:
751 break;
752 case IMAGE_REL_BASED_HIGH:
753 *(short*)(page+offset) += HIWORD(delta);
754 break;
755 case IMAGE_REL_BASED_LOW:
756 *(short*)(page+offset) += LOWORD(delta);
757 break;
758 case IMAGE_REL_BASED_HIGHLOW:
759 *(int*)(page+offset) += delta;
760 /* FIXME: if this is an exported address, fire up enhanced logic */
761 break;
762 default:
763 FIXME_(module)("Unknown/unsupported fixup type %d.\n", type);
764 break;
765 }
766 }
767 }
768 return 1;
769 }
770
771
772 /***********************************************************************
773 * map_image
774 *
775 * Map an executable (PE format) image into memory.
776 */
777 static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
778 DWORD header_size, int shared_fd, BOOL removable, PVOID *addr_ptr )
779 {
780 IMAGE_DOS_HEADER *dos;
781 IMAGE_NT_HEADERS *nt;
782 IMAGE_SECTION_HEADER *sec;
783 IMAGE_DATA_DIRECTORY *imports;
784 NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
785 int i;
786 off_t pos;
787 struct file_view *view = NULL;
788 char *ptr;
789
790 /* zero-map the whole range */
791
792 RtlEnterCriticalSection( &csVirtual );
793
794 if (base >= (char *)0x110000) /* make sure the DOS area remains free */
795 status = map_view( &view, base, total_size,
796 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
797
798 if (status == STATUS_CONFLICTING_ADDRESSES)
799 status = map_view( &view, NULL, total_size,
800 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
801
802 if (status != STATUS_SUCCESS) goto error;
803
804 ptr = view->base;
805 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
806
807 /* map the header */
808
809 status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
810 if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ,
811 removable ) != STATUS_SUCCESS) goto error;
812 dos = (IMAGE_DOS_HEADER *)ptr;
813 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
814 if ((char *)(nt + 1) > ptr + header_size) goto error;
815
816 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
817 if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
818
819 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
820 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
821
822 /* check the architecture */
823
824 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
825 {
826 MESSAGE("Trying to load PE image for unsupported architecture (");
827 switch (nt->FileHeader.Machine)
828 {
829 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
830 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
831 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
832 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
833 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
834 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
835 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
836 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
837 }
838 MESSAGE(")\n");
839 goto error;
840 }
841
842 /* map all the sections */
843
844 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
845 {
846 DWORD size;
847
848 /* a few sanity checks */
849 size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
850 if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
851 {
852 ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
853 sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
854 goto error;
855 }
856
857 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
858 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
859 {
860 size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
861 TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
862 sec->Name, ptr + sec->VirtualAddress,
863 sec->PointerToRawData, (int)pos, sec->SizeOfRawData,
864 size, sec->Characteristics );
865 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, size, pos,
866 VPROT_COMMITTED | VPROT_READ | PROT_WRITE,
867 FALSE ) != STATUS_SUCCESS)
868 {
869 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
870 goto error;
871 }
872
873 /* check if the import directory falls inside this section */
874 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
875 imports->VirtualAddress < sec->VirtualAddress + size)
876 {
877 UINT_PTR base = imports->VirtualAddress & ~page_mask;
878 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
879 if (end > sec->VirtualAddress + size) end = sec->VirtualAddress + size;
880 if (end > base)
881 map_file_into_view( view, shared_fd, base, end - base,
882 pos + (base - sec->VirtualAddress),
883 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
884 FALSE );
885 }
886 pos += size;
887 continue;
888 }
889
890 TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
891 sec->Name, ptr + sec->VirtualAddress,
892 sec->PointerToRawData, sec->SizeOfRawData,
893 sec->Characteristics );
894
895 if ((sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) &&
896 !(sec->Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA)) continue;
897 if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
898
899 /* Note: if the section is not aligned properly map_file_into_view will magically
900 * fall back to read(), so we don't need to check anything here.
901 */
902 if (map_file_into_view( view, fd, sec->VirtualAddress, sec->SizeOfRawData, sec->PointerToRawData,
903 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
904 removable ) != STATUS_SUCCESS)
905 {
906 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
907 goto error;
908 }
909
910 if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
911 {
912 DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
913 if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
914 TRACE_(module)("clearing %p - %p\n",
915 ptr + sec->VirtualAddress + sec->SizeOfRawData,
916 ptr + sec->VirtualAddress + end );
917 memset( ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
918 end - sec->SizeOfRawData );
919 }
920 }
921
922
923 /* perform base relocation, if necessary */
924
925 if (ptr != base)
926 {
927 const IMAGE_DATA_DIRECTORY *relocs;
928
929 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
930 if (!relocs->VirtualAddress || !relocs->Size)
931 {
932 if (nt->OptionalHeader.ImageBase == 0x400000) {
933 ERR("Image was mapped at %p: standard load address for a Win32 program (0x00400000) not available\n", ptr);
934 ERR("Do you have exec-shield or prelink active?\n");
935 } else
936 ERR( "FATAL: Need to relocate module from addr %lx, but there are no relocation records\n",
937 nt->OptionalHeader.ImageBase );
938 goto error;
939 }
940
941 /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
942 * really make sure that the *new* base address is also > 2GB.
943 * Some DLLs really check the MSB of the module handle :-/
944 */
945 if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((DWORD)base & 0x80000000))
946 ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
947
948 if (!do_relocations( ptr, relocs, ptr - base, total_size ))
949 {
950 goto error;
951 }
952 }
953
954 if (!removable) /* don't keep handle open on removable media */
955 NtDuplicateObject( GetCurrentProcess(), hmapping,
956 GetCurrentProcess(), &view->mapping,
957 0, 0, DUPLICATE_SAME_ACCESS );
958
959 /* set the image protections */
960
961 sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
962 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
963 {
964 DWORD size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
965 BYTE vprot = VPROT_COMMITTED;
966 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
967 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_READ|VPROT_WRITECOPY;
968 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
969
970 /* make sure the import directory is writable */
971 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
972 imports->VirtualAddress < sec->VirtualAddress + size)
973 vprot |= VPROT_READ|VPROT_WRITECOPY;
974
975 VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
976 }
977 RtlLeaveCriticalSection( &csVirtual );
978
979 *addr_ptr = ptr;
980 return STATUS_SUCCESS;
981
982 error:
983 if (view) delete_view( view );
984 RtlLeaveCriticalSection( &csVirtual );
985 return status;
986 }
987
988
989 /***********************************************************************
990 * is_current_process
991 *
992 * Check whether a process handle is for the current process.
993 */
994 static BOOL is_current_process( HANDLE handle )
995 {
996 BOOL ret = FALSE;
997
998 if (handle == GetCurrentProcess()) return TRUE;
999 SERVER_START_REQ( get_process_info )
1000 {
1001 req->handle = handle;
1002 if (!wine_server_call( req ))
1003 ret = ((DWORD)reply->pid == GetCurrentProcessId());
1004 }
1005 SERVER_END_REQ;
1006 return ret;
1007 }
1008
1009
1010 /***********************************************************************
1011 * virtual_init
1012 */
1013 void virtual_init(void)
1014 {
1015 #ifndef page_mask
1016 page_size = getpagesize();
1017 page_mask = page_size - 1;
1018 /* Make sure we have a power of 2 */
1019 assert( !(page_size & page_mask) );
1020 page_shift = 0;
1021 while ((1 << page_shift) != page_size) page_shift++;
1022 #endif /* page_mask */
1023 }
1024
1025
1026 /***********************************************************************
1027 * VIRTUAL_SetFaultHandler
1028 */
1029 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
1030 {
1031 FILE_VIEW *view;
1032 BOOL ret = FALSE;
1033
1034 RtlEnterCriticalSection( &csVirtual );
1035 if ((view = VIRTUAL_FindView( addr )))
1036 {
1037 view->handlerProc = proc;
1038 view->handlerArg = arg;
1039 ret = TRUE;
1040 }
1041 RtlLeaveCriticalSection( &csVirtual );
1042 return ret;
1043 }
1044
1045 /***********************************************************************
1046 * VIRTUAL_HandleFault
1047 */
1048 DWORD VIRTUAL_HandleFault( LPCVOID addr )
1049 {
1050 FILE_VIEW *view;
1051 DWORD ret = EXCEPTION_ACCESS_VIOLATION;
1052
1053 RtlEnterCriticalSection( &csVirtual );
1054 if ((view = VIRTUAL_FindView( addr )))
1055 {
1056 if (view->handlerProc)
1057 {
1058 HANDLERPROC proc = view->handlerProc;
1059 void *arg = view->handlerArg;
1060 RtlLeaveCriticalSection( &csVirtual );
1061 if (proc( arg, addr )) ret = 0; /* handled */
1062 return ret;
1063 }
1064 else
1065 {
1066 BYTE vprot = view->prot[((const char *)addr - (const char *)view->base) >> page_shift];
1067 void *page = (void *)((UINT_PTR)addr & ~page_mask);
1068 char *stack = NtCurrentTeb()->Tib.StackLimit;
1069 if (vprot & VPROT_GUARD)
1070 {
1071 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
1072 ret = STATUS_GUARD_PAGE_VIOLATION;
1073 }
1074 /* is it inside the stack guard page? */
1075 if (((const char *)addr >= stack) && ((const char *)addr < stack + (page_mask+1)))
1076 ret = STATUS_STACK_OVERFLOW;
1077 }
1078 }
1079 RtlLeaveCriticalSection( &csVirtual );
1080 return ret;
1081 }
1082
1083 /***********************************************************************
1084 * VIRTUAL_HasMapping
1085 *
1086 * Check if the specified view has an associated file mapping.
1087 */
1088 BOOL VIRTUAL_HasMapping( LPCVOID addr )
1089 {
1090 FILE_VIEW *view;
1091 BOOL ret = FALSE;
1092
1093 RtlEnterCriticalSection( &csVirtual );
1094 if ((view = VIRTUAL_FindView( addr ))) ret = (view->mapping != 0);
1095 RtlLeaveCriticalSection( &csVirtual );
1096 return ret;
1097 }
1098
1099
1100 /***********************************************************************
1101 * NtAllocateVirtualMemory (NTDLL.@)
1102 * ZwAllocateVirtualMemory (NTDLL.@)
1103 */
1104 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, PVOID addr,
1105 ULONG *size_ptr, ULONG type, ULONG protect )
1106 {
1107 void *base;
1108 BYTE vprot;
1109 DWORD size = *size_ptr;
1110 NTSTATUS status = STATUS_SUCCESS;
1111 struct file_view *view;
1112
1113 if (!is_current_process( process ))
1114 {
1115 ERR("Unsupported on other process\n");
1116 return STATUS_ACCESS_DENIED;
1117 }
1118
1119 TRACE("%p %08lx %lx %08lx\n", addr, size, type, protect );
1120
1121 if (!size) return STATUS_INVALID_PARAMETER;
1122
1123 /* Round parameters to a page boundary */
1124
1125 if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
1126
1127 if (addr)
1128 {
1129 if (type & MEM_RESERVE) /* Round down to 64k boundary */
1130 base = ROUND_ADDR( addr, granularity_mask );
1131 else
1132 base = ROUND_ADDR( addr, page_mask );
1133 size = (((UINT_PTR)addr + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1134
1135 /* disallow low 64k, wrap-around and kernel space */
1136 if (((char *)base <= (char *)granularity_mask) ||
1137 ((char *)base + size < (char *)base) ||
1138 is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
1139 return STATUS_INVALID_PARAMETER;
1140 }
1141 else
1142 {
1143 base = NULL;
1144 size = (size + page_mask) & ~page_mask;
1145 }
1146
1147 if (type & MEM_TOP_DOWN) {
1148 /* FIXME: MEM_TOP_DOWN allocates the largest possible address. */
1149 WARN("MEM_TOP_DOWN ignored\n");
1150 type &= ~MEM_TOP_DOWN;
1151 }
1152
1153 /* Compute the alloc type flags */
1154
1155 if (!(type & MEM_SYSTEM))
1156 {
1157 if (!(type & (MEM_COMMIT | MEM_RESERVE)) || (type & ~(MEM_COMMIT | MEM_RESERVE)))
1158 {
1159 WARN("called with wrong alloc type flags (%08lx) !\n", type);
1160 return STATUS_INVALID_PARAMETER;
1161 }
1162 }
1163 vprot = VIRTUAL_GetProt( protect );
1164 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
1165
1166 /* Reserve the memory */
1167
1168 RtlEnterCriticalSection( &csVirtual );
1169
1170 if (type & MEM_SYSTEM)
1171 {
1172 if (type & MEM_IMAGE) vprot |= VPROT_IMAGE;
1173 status = create_view( &view, base, size, vprot | VPROT_COMMITTED );
1174 if (status == STATUS_SUCCESS)
1175 {
1176 view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
1177 base = view->base;
1178 }
1179 }
1180 else if ((type & MEM_RESERVE) || !base)
1181 {
1182 status = map_view( &view, base, size, vprot );
1183 if (status == STATUS_SUCCESS)
1184 {
1185 view->flags |= VFLAG_VALLOC;
1186 base = view->base;
1187 }
1188 }
1189 else /* commit the pages */
1190 {
1191 if (!(view = VIRTUAL_FindView( base )) ||
1192 ((char *)base + size > (char *)view->base + view->size)) status = STATUS_NOT_MAPPED_VIEW;
1193 else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1194 }
1195
1196 RtlLeaveCriticalSection( &csVirtual );
1197
1198 if (status == STATUS_SUCCESS)
1199 {
1200 *ret = base;
1201 *size_ptr = size;
1202 }
1203 return status;
1204 }
1205
1206
1207 /***********************************************************************
1208 * NtFreeVirtualMemory (NTDLL.@)
1209 * ZwFreeVirtualMemory (NTDLL.@)
1210 */
1211 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, ULONG *size_ptr, ULONG type )
1212 {
1213 FILE_VIEW *view;
1214 char *base;
1215 NTSTATUS status = STATUS_SUCCESS;
1216 LPVOID addr = *addr_ptr;
1217 DWORD size = *size_ptr;
1218
1219 if (!is_current_process( process ))
1220 {
1221 ERR("Unsupported on other process\n");
1222 return STATUS_ACCESS_DENIED;
1223 }
1224
1225 TRACE("%p %08lx %lx\n", addr, size, type );
1226
1227 /* Fix the parameters */
1228
1229 size = ROUND_SIZE( addr, size );
1230 base = ROUND_ADDR( addr, page_mask );
1231
1232 RtlEnterCriticalSection(&csVirtual);
1233
1234 if (!(view = VIRTUAL_FindView( base )) ||
1235 (base + size > (char *)view->base + view->size) ||
1236 !(view->flags & VFLAG_VALLOC))
1237 {
1238 status = STATUS_INVALID_PARAMETER;
1239 }
1240 else if (type & MEM_SYSTEM)
1241 {
1242 /* return the values that the caller should use to unmap the area */
1243 *addr_ptr = view->base;
1244 *size_ptr = view->size;
1245 view->flags |= VFLAG_SYSTEM;
1246 delete_view( view );
1247 }
1248 else if (type == MEM_RELEASE)
1249 {
1250 /* Free the pages */
1251
1252 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
1253 else
1254 {
1255 delete_view( view );
1256 *addr_ptr = base;
1257 *size_ptr = size;
1258 }
1259 }
1260 else if (type == MEM_DECOMMIT)
1261 {
1262 status = decommit_pages( view, base - (char *)view->base, size );
1263 if (status == STATUS_SUCCESS)
1264 {
1265 *addr_ptr = base;
1266 *size_ptr = size;
1267 }
1268 }
1269 else
1270 {
1271 WARN("called with wrong free type flags (%08lx) !\n", type);
1272 status = STATUS_INVALID_PARAMETER;
1273 }
1274
1275 RtlLeaveCriticalSection(&csVirtual);
1276 return status;
1277 }
1278
1279
1280 /***********************************************************************
1281 * NtProtectVirtualMemory (NTDLL.@)
1282 * ZwProtectVirtualMemory (NTDLL.@)
1283 */
1284 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, ULONG *size_ptr,
1285 ULONG new_prot, ULONG *old_prot )
1286 {
1287 FILE_VIEW *view;
1288 NTSTATUS status = STATUS_SUCCESS;
1289 char *base;
1290 UINT i;
1291 BYTE vprot, *p;
1292 DWORD prot, size = *size_ptr;
1293 LPVOID addr = *addr_ptr;
1294
1295 if (!is_current_process( process ))
1296 {
1297 ERR("Unsupported on other process\n");
1298 return STATUS_ACCESS_DENIED;
1299 }
1300
1301 TRACE("%p %08lx %08lx\n", addr, size, new_prot );
1302
1303 /* Fix the parameters */
1304
1305 size = ROUND_SIZE( addr, size );
1306 base = ROUND_ADDR( addr, page_mask );
1307
1308 RtlEnterCriticalSection( &csVirtual );
1309
1310 if (!(view = VIRTUAL_FindView( base )) || (base + size > (char *)view->base + view->size))
1311 {
1312 status = STATUS_INVALID_PARAMETER;
1313 }
1314 else
1315 {
1316 /* Make sure all the pages are committed */
1317
1318 p = view->prot + ((base - (char *)view->base) >> page_shift);
1319 VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1320 for (i = size >> page_shift; i; i--, p++)
1321 {
1322 if (!(*p & VPROT_COMMITTED))
1323 {
1324 status = STATUS_NOT_COMMITTED;
1325 break;
1326 }
1327 }
1328 if (!i)
1329 {
1330 if (old_prot) *old_prot = prot;
1331 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1332 if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1333 }
1334 }
1335 RtlLeaveCriticalSection( &csVirtual );
1336
1337 if (status == STATUS_SUCCESS)
1338 {
1339 *addr_ptr = base;
1340 *size_ptr = size;
1341 }
1342 return status;
1343 }
1344
1345
1346 /***********************************************************************
1347 * NtQueryVirtualMemory (NTDLL.@)
1348 * ZwQueryVirtualMemory (NTDLL.@)
1349 */
1350 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
1351 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
1352 ULONG len, ULONG *res_len )
1353 {
1354 FILE_VIEW *view;
1355 char *base, *alloc_base = 0;
1356 struct list *ptr;
1357 UINT size = 0;
1358 MEMORY_BASIC_INFORMATION *info = buffer;
1359
1360 if (info_class != MemoryBasicInformation) return STATUS_INVALID_INFO_CLASS;
1361 if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
1362 return STATUS_WORKING_SET_LIMIT_RANGE;
1363
1364 if (!is_current_process( process ))
1365 {
1366 ERR("Unsupported on other process\n");
1367 return STATUS_ACCESS_DENIED;
1368 }
1369
1370 base = ROUND_ADDR( addr, page_mask );
1371
1372 /* Find the view containing the address */
1373
1374 RtlEnterCriticalSection(&csVirtual);
1375 ptr = list_head( &views_list );
1376 for (;;)
1377 {
1378 if (!ptr)
1379 {
1380 /* make the address space end at the user limit, except if
1381 * the last view was mapped beyond that */
1382 if (alloc_base < (char *)USER_SPACE_LIMIT)
1383 {
1384 if (USER_SPACE_LIMIT && base >= (char *)USER_SPACE_LIMIT)
1385 {
1386 RtlLeaveCriticalSection( &csVirtual );
1387 return STATUS_WORKING_SET_LIMIT_RANGE;
1388 }
1389 size = (char *)USER_SPACE_LIMIT - alloc_base;
1390 }
1391 else size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1392 view = NULL;
1393 break;
1394 }
1395 view = LIST_ENTRY( ptr, struct file_view, entry );
1396 if ((char *)view->base > base)
1397 {
1398 size = (char *)view->base - alloc_base;
1399 view = NULL;
1400 break;
1401 }
1402 if ((char *)view->base + view->size > base)
1403 {
1404 alloc_base = view->base;
1405 size = view->size;
1406 break;
1407 }
1408 alloc_base = (char *)view->base + view->size;
1409 ptr = list_next( &views_list, ptr );
1410 }
1411
1412 /* Fill the info structure */
1413
1414 if (!view)
1415 {
1416 info->State = MEM_FREE;
1417 info->Protect = 0;
1418 info->AllocationProtect = 0;
1419 info->Type = 0;
1420 }
1421 else
1422 {
1423 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1424 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1425 for (size = base - alloc_base; size < view->size; size += page_mask+1)
1426 if (view->prot[size >> page_shift] != vprot) break;
1427 VIRTUAL_GetWin32Prot( view->protect, &info->AllocationProtect, NULL );
1428 if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
1429 else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
1430 else info->Type = MEM_MAPPED;
1431 }
1432 RtlLeaveCriticalSection(&csVirtual);
1433
1434 info->BaseAddress = (LPVOID)base;
1435 info->AllocationBase = (LPVOID)alloc_base;
1436 info->RegionSize = size - (base - alloc_base);
1437 if (res_len) *res_len = sizeof(*info);
1438 return STATUS_SUCCESS;
1439 }
1440
1441
1442 /***********************************************************************
1443 * NtLockVirtualMemory (NTDLL.@)
1444 * ZwLockVirtualMemory (NTDLL.@)
1445 */
1446 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, ULONG *size, ULONG unknown )
1447 {
1448 if (!is_current_process( process ))
1449 {
1450 ERR("Unsupported on other process\n");
1451 return STATUS_ACCESS_DENIED;
1452 }
1453 return STATUS_SUCCESS;
1454 }
1455
1456
1457 /***********************************************************************
1458 * NtUnlockVirtualMemory (NTDLL.@)
1459 * ZwUnlockVirtualMemory (NTDLL.@)
1460 */
1461 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, ULONG *size, ULONG unknown )
1462 {
1463 if (!is_current_process( process ))
1464 {
1465 ERR("Unsupported on other process\n");
1466 return STATUS_ACCESS_DENIED;
1467 }
1468 return STATUS_SUCCESS;
1469 }
1470
1471
1472 /***********************************************************************
1473 * NtCreateSection (NTDLL.@)
1474 * ZwCreateSection (NTDLL.@)
1475 */
1476 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
1477 const LARGE_INTEGER *size, ULONG protect,
1478 ULONG sec_flags, HANDLE file )
1479 {
1480 NTSTATUS ret;
1481 BYTE vprot;
1482 DWORD len = attr->ObjectName ? attr->ObjectName->Length : 0;
1483
1484 /* Check parameters */
1485
1486 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1487
1488 vprot = VIRTUAL_GetProt( protect );
1489 if (sec_flags & SEC_RESERVE)
1490 {
1491 if (file) return STATUS_INVALID_PARAMETER;
1492 }
1493 else vprot |= VPROT_COMMITTED;
1494 if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1495 if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
1496
1497 /* Create the server object */
1498
1499 SERVER_START_REQ( create_mapping )
1500 {
1501 req->file_handle = file;
1502 req->size_high = size ? size->u.HighPart : 0;
1503 req->size_low = size ? size->u.LowPart : 0;
1504 req->protect = vprot;
1505 req->access = access;
1506 req->inherit = (attr->Attributes & OBJ_INHERIT) != 0;
1507 if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
1508 ret = wine_server_call( req );
1509 *handle = reply->handle;
1510 }
1511 SERVER_END_REQ;
1512 return ret;
1513 }
1514
1515
1516 /***********************************************************************
1517 * NtOpenSection (NTDLL.@)
1518 * ZwOpenSection (NTDLL.@)
1519 */
1520 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
1521 {
1522 NTSTATUS ret;
1523 DWORD len = attr->ObjectName->Length;
1524
1525 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1526
1527 SERVER_START_REQ( open_mapping )
1528 {
1529 req->access = access;
1530 req->inherit = (attr->Attributes & OBJ_INHERIT) != 0;
1531 wine_server_add_data( req, attr->ObjectName->Buffer, len );
1532 if (!(ret = wine_server_call( req ))) *handle = reply->handle;
1533 }
1534 SERVER_END_REQ;
1535 return ret;
1536 }
1537
1538
1539 /***********************************************************************
1540 * NtMapViewOfSection (NTDLL.@)
1541 * ZwMapViewOfSection (NTDLL.@)
1542 */
1543 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
1544 ULONG commit_size, const LARGE_INTEGER *offset, ULONG *size_ptr,
1545 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
1546 {
1547 IO_STATUS_BLOCK io;
1548 FILE_FS_DEVICE_INFORMATION device_info;
1549 NTSTATUS res;
1550 UINT size = 0;
1551 int unix_handle = -1;
1552 int prot;
1553 void *base;
1554 struct file_view *view;
1555 DWORD size_low, size_high, header_size, shared_size;
1556 HANDLE shared_file;
1557 BOOL removable = FALSE;
1558
1559 if (!is_current_process( process ))
1560 {
1561 ERR("Unsupported on other process\n");
1562 return STATUS_ACCESS_DENIED;
1563 }
1564
1565 TRACE("handle=%p addr=%p off=%lx%08lx size=%x access=%lx\n",
1566 handle, *addr_ptr, offset->u.HighPart, offset->u.LowPart, size, protect );
1567
1568 /* Check parameters */
1569
1570 if ((offset->u.LowPart & granularity_mask) ||
1571 (*addr_ptr && ((UINT_PTR)*addr_ptr & granularity_mask)))
1572 return STATUS_INVALID_PARAMETER;
1573
1574 SERVER_START_REQ( get_mapping_info )
1575 {
1576 req->handle = handle;
1577 res = wine_server_call( req );
1578 prot = reply->protect;
1579 base = reply->base;
1580 size_low = reply->size_low;
1581 size_high = reply->size_high;
1582 header_size = reply->header_size;
1583 shared_file = reply->shared_file;
1584 shared_size = reply->shared_size;
1585 }
1586 SERVER_END_REQ;
1587 if (res) return res;
1588
1589 if ((res = wine_server_handle_to_fd( handle, 0, &unix_handle, NULL, NULL ))) return res;
1590
1591 if (NtQueryVolumeInformationFile( handle, &io, &device_info, sizeof(device_info),
1592 FileFsDeviceInformation ) == STATUS_SUCCESS)
1593 removable = device_info.Characteristics & FILE_REMOVABLE_MEDIA;
1594
1595 if (prot & VPROT_IMAGE)
1596 {
1597 if (shared_file)
1598 {
1599 int shared_fd;
1600
1601 if ((res = wine_server_handle_to_fd( shared_file, GENERIC_READ, &shared_fd,
1602 NULL, NULL ))) goto done;
1603 res = map_image( handle, unix_handle, base, size_low, header_size,
1604 shared_fd, removable, addr_ptr );
1605 wine_server_release_fd( shared_file, shared_fd );
1606 NtClose( shared_file );
1607 }
1608 else
1609 {
1610 res = map_image( handle, unix_handle, base, size_low, header_size,
1611 -1, removable, addr_ptr );
1612 }
1613 wine_server_release_fd( handle, unix_handle );
1614 if (!res) *size_ptr = size_low;
1615 return res;
1616 }
1617
1618 if (size_high)
1619 ERR("Sizes larger than 4Gb not supported\n");
1620
1621 if ((offset->u.LowPart >= size_low) ||
1622 (*size_ptr > size_low - offset->u.LowPart))
1623 {
1624 res = STATUS_INVALID_PARAMETER;
1625 goto done;
1626 }
1627 if (*size_ptr) size = ROUND_SIZE( offset->u.LowPart, *size_ptr );
1628 else size = size_low - offset->u.LowPart;
1629
1630 switch(protect)
1631 {
1632 case PAGE_NOACCESS:
1633 break;
1634 case PAGE_READWRITE:
1635 case PAGE_EXECUTE_READWRITE:
1636 if (!(prot & VPROT_WRITE))
1637 {
1638 res = STATUS_INVALID_PARAMETER;
1639 goto done;
1640 }
1641 removable = FALSE;
1642 /* fall through */
1643 case PAGE_READONLY:
1644 case PAGE_WRITECOPY:
1645 case PAGE_EXECUTE:
1646 case PAGE_EXECUTE_READ:
1647 case PAGE_EXECUTE_WRITECOPY:
1648 if (prot & VPROT_READ) break;
1649 /* fall through */
1650 default:
1651 res = STATUS_INVALID_PARAMETER;
1652 goto done;
1653 }
1654
1655 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1656 * which has a view of this mapping commits some pages, they will
1657 * appear commited in all other processes, which have the same
1658 * view created. Since we don`t support this yet, we create the
1659 * whole mapping commited.
1660 */
1661 prot |= VPROT_COMMITTED;
1662
1663 /* Reserve a properly aligned area */
1664
1665 RtlEnterCriticalSection( &csVirtual );
1666
1667 res = map_view( &view, *addr_ptr, size, prot );
1668 if (res)
1669 {
1670 RtlLeaveCriticalSection( &csVirtual );
1671 goto done;
1672 }
1673
1674 /* Map the file */
1675
1676 TRACE("handle=%p size=%x offset=%lx%08lx\n",
1677 handle, size, offset->u.HighPart, offset->u.LowPart );
1678
1679 res = map_file_into_view( view, unix_handle, 0, size, offset->QuadPart, prot, removable );
1680 if (res == STATUS_SUCCESS)
1681 {
1682 if (!removable) /* don't keep handle open on removable media */
1683 NtDuplicateObject( GetCurrentProcess(), handle,
1684 GetCurrentProcess(), &view->mapping,
1685 0, 0, DUPLICATE_SAME_ACCESS );
1686
1687 *addr_ptr = view->base;
1688 *size_ptr = size;
1689 }
1690 else
1691 {
1692 ERR( "map_file_into_view %p %x %lx%08lx failed\n",
1693 view->base, size, offset->u.HighPart, offset->u.LowPart );
1694 delete_view( view );
1695 }
1696
1697 RtlLeaveCriticalSection( &csVirtual );
1698
1699 done:
1700 wine_server_release_fd( handle, unix_handle );
1701 return res;
1702 }
1703
1704
1705 /***********************************************************************
1706 * NtUnmapViewOfSection (NTDLL.@)
1707 * ZwUnmapViewOfSection (NTDLL.@)
1708 */
1709 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
1710 {
1711 FILE_VIEW *view;
1712 NTSTATUS status = STATUS_INVALID_PARAMETER;
1713 void *base = ROUND_ADDR( addr, page_mask );
1714
1715 if (!is_current_process( process ))
1716 {
1717 ERR("Unsupported on other process\n");
1718 return STATUS_ACCESS_DENIED;
1719 }
1720 RtlEnterCriticalSection( &csVirtual );
1721 if ((view = VIRTUAL_FindView( base )) && (base == view->base))
1722 {
1723 delete_view( view );
1724 status = STATUS_SUCCESS;
1725 }
1726 RtlLeaveCriticalSection( &csVirtual );
1727 return status;
1728 }
1729
1730
1731 /***********************************************************************
1732 * NtFlushVirtualMemory (NTDLL.@)
1733 * ZwFlushVirtualMemory (NTDLL.@)
1734 */
1735 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
1736 ULONG *size_ptr, ULONG unknown )
1737 {
1738 FILE_VIEW *view;
1739 NTSTATUS status = STATUS_SUCCESS;
1740 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
1741
1742 if (!is_current_process( process ))
1743 {
1744 ERR("Unsupported on other process\n");
1745 return STATUS_ACCESS_DENIED;
1746 }
1747 RtlEnterCriticalSection( &csVirtual );
1748 if (!(view = VIRTUAL_FindView( addr ))) status = STATUS_INVALID_PARAMETER;
1749 else
1750 {
1751 if (!*size_ptr) *size_ptr = view->size;
1752 *addr_ptr = addr;
1753 if (msync( addr, *size_ptr, MS_SYNC )) status = STATUS_NOT_MAPPED_DATA;
1754 }
1755 RtlLeaveCriticalSection( &csVirtual );
1756 return status;
1757 }
1758
1759
1760 /***********************************************************************
1761 * NtReadVirtualMemory (NTDLL.@)
1762 * ZwReadVirtualMemory (NTDLL.@)
1763 */
1764 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
1765 SIZE_T size, SIZE_T *bytes_read )
1766 {
1767 NTSTATUS status;
1768
1769 SERVER_START_REQ( read_process_memory )
1770 {
1771 req->handle = process;
1772 req->addr = (void *)addr;
1773 wine_server_set_reply( req, buffer, size );
1774 if ((status = wine_server_call( req ))) size = 0;
1775 }
1776 SERVER_END_REQ;
1777 if (bytes_read) *bytes_read = size;
1778 return status;
1779 }
1780
1781
1782 /***********************************************************************
1783 * NtWriteVirtualMemory (NTDLL.@)
1784 * ZwWriteVirtualMemory (NTDLL.@)
1785 */
1786 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
1787 SIZE_T size, SIZE_T *bytes_written )
1788 {
1789 static const unsigned int zero;
1790 unsigned int first_offset, last_offset, first_mask, last_mask;
1791 NTSTATUS status;
1792
1793 if (!size) return STATUS_INVALID_PARAMETER;
1794
1795 /* compute the mask for the first int */
1796 first_mask = ~0;
1797 first_offset = (unsigned int)addr % sizeof(int);
1798 memset( &first_mask, 0, first_offset );
1799
1800 /* compute the mask for the last int */
1801 last_offset = (size + first_offset) % sizeof(int);
1802 last_mask = 0;
1803 memset( &last_mask, 0xff, last_offset ? last_offset : sizeof(int) );
1804
1805 SERVER_START_REQ( write_process_memory )
1806 {
1807 req->handle = process;
1808 req->addr = (char *)addr - first_offset;
1809 req->first_mask = first_mask;
1810 req->last_mask = last_mask;
1811 if (first_offset) wine_server_add_data( req, &zero, first_offset );
1812 wine_server_add_data( req, buffer, size );
1813 if (last_offset) wine_server_add_data( req, &zero, sizeof(int) - last_offset );
1814
1815 if ((status = wine_server_call( req ))) size = 0;
1816 }
1817 SERVER_END_REQ;
1818 if (bytes_written) *bytes_written = size;
1819 return status;
1820 }
Windows API implementation