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Initialize .COM stack.
[wine/multimedia.git] / dlls / ntdll / virtual.c
blobe48ea7b834b61410037da85edfb112bf59be415b
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 static void *user_space_limit = USER_SPACE_LIMIT;
141
142
143 /***********************************************************************
144 * VIRTUAL_GetProtStr
145 */
146 static const char *VIRTUAL_GetProtStr( BYTE prot )
147 {
148 static char buffer[6];
149 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
150 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
151 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
152 buffer[3] = (prot & VPROT_WRITECOPY) ? 'W' : ((prot & VPROT_WRITE) ? 'w' : '-');
153 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
154 buffer[5] = 0;
155 return buffer;
156 }
157
158
159 /***********************************************************************
160 * VIRTUAL_DumpView
161 */
162 static void VIRTUAL_DumpView( FILE_VIEW *view )
163 {
164 UINT i, count;
165 char *addr = view->base;
166 BYTE prot = view->prot[0];
167
168 DPRINTF( "View: %p - %p", addr, addr + view->size - 1 );
169 if (view->flags & VFLAG_SYSTEM)
170 DPRINTF( " (system)\n" );
171 else if (view->flags & VFLAG_VALLOC)
172 DPRINTF( " (valloc)\n" );
173 else if (view->mapping)
174 DPRINTF( " %p\n", view->mapping );
175 else
176 DPRINTF( " (anonymous)\n");
177
178 for (count = i = 1; i < view->size >> page_shift; i++, count++)
179 {
180 if (view->prot[i] == prot) continue;
181 DPRINTF( " %p - %p %s\n",
182 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
183 addr += (count << page_shift);
184 prot = view->prot[i];
185 count = 0;
186 }
187 if (count)
188 DPRINTF( " %p - %p %s\n",
189 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
190 }
191
192
193 /***********************************************************************
194 * VIRTUAL_Dump
195 */
196 void VIRTUAL_Dump(void)
197 {
198 struct list *ptr;
199
200 DPRINTF( "\nDump of all virtual memory views:\n\n" );
201 RtlEnterCriticalSection(&csVirtual);
202 LIST_FOR_EACH( ptr, &views_list )
203 {
204 VIRTUAL_DumpView( LIST_ENTRY( ptr, struct file_view, entry ) );
205 }
206 RtlLeaveCriticalSection(&csVirtual);
207 }
208
209
210 /***********************************************************************
211 * VIRTUAL_FindView
212 *
213 * Find the view containing a given address. The csVirtual section must be held by caller.
214 *
215 * RETURNS
216 * View: Success
217 * NULL: Failure
218 */
219 static struct file_view *VIRTUAL_FindView( const void *addr ) /* [in] Address */
220 {
221 struct list *ptr;
222
223 LIST_FOR_EACH( ptr, &views_list )
224 {
225 struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
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 list *ptr;
242
243 LIST_FOR_EACH( ptr, &views_list )
244 {
245 struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
246 if ((const char *)view->base >= (const char *)addr + size) break;
247 if ((const char *)view->base + view->size > (const char *)addr) return view;
248 }
249 return NULL;
250 }
251
252
253 /***********************************************************************
254 * add_reserved_area
255 *
256 * Add a reserved area to the list maintained by libwine.
257 * The csVirtual section must be held by caller.
258 */
259 static void add_reserved_area( void *addr, size_t size )
260 {
261 TRACE( "adding %p-%p\n", addr, (char *)addr + size );
262
263 if (addr < user_space_limit)
264 {
265 /* unmap the part of the area that is below the limit */
266 assert( (char *)addr + size > (char *)user_space_limit );
267 munmap( addr, (char *)user_space_limit - (char *)addr );
268 size -= (char *)user_space_limit - (char *)addr;
269 addr = user_space_limit;
270 }
271 /* blow away existing mappings */
272 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
273 wine_mmap_add_reserved_area( addr, size );
274 }
275
276
277 /***********************************************************************
278 * remove_reserved_area
279 *
280 * Remove a reserved area from the list maintained by libwine.
281 * The csVirtual section must be held by caller.
282 */
283 static void remove_reserved_area( void *addr, size_t size )
284 {
285 struct list *ptr;
286
287 LIST_FOR_EACH( ptr, &views_list )
288 {
289 struct file_view *view = LIST_ENTRY( ptr, struct file_view, entry );
290 if ((char *)view->base >= (char *)addr + size) break;
291 if ((char *)view->base + view->size <= (char *)addr) continue;
292 /* now we have an overlapping view */
293 if (view->base > addr)
294 {
295 wine_mmap_remove_reserved_area( addr, (char *)view->base - (char *)addr, TRUE );
296 size -= (char *)view->base - (char *)addr;
297 addr = view->base;
298 }
299 if ((char *)view->base + view->size >= (char *)addr + size)
300 {
301 /* view covers all the remaining area */
302 wine_mmap_remove_reserved_area( addr, size, FALSE );
303 size = 0;
304 break;
305 }
306 else /* view covers only part of the area */
307 {
308 wine_mmap_remove_reserved_area( addr, (char *)view->base + view->size - (char *)addr, FALSE );
309 size -= (char *)view->base + view->size - (char *)addr;
310 addr = (char *)view->base + view->size;
311 }
312 }
313 /* remove remaining space */
314 if (size) wine_mmap_remove_reserved_area( addr, size, TRUE );
315 }
316
317
318 /***********************************************************************
319 * is_beyond_limit
320 *
321 * Check if an address range goes beyond a given limit.
322 */
323 static inline int is_beyond_limit( void *addr, size_t size, void *limit )
324 {
325 return (limit && (addr >= limit || (char *)addr + size > (char *)limit));
326 }
327
328
329 /***********************************************************************
330 * unmap_area
331 *
332 * Unmap an area, or simply replace it by an empty mapping if it is
333 * in a reserved area. The csVirtual section must be held by caller.
334 */
335 static inline void unmap_area( void *addr, size_t size )
336 {
337 if (wine_mmap_is_in_reserved_area( addr, size ))
338 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
339 else
340 munmap( addr, size );
341 }
342
343
344 /***********************************************************************
345 * delete_view
346 *
347 * Deletes a view. The csVirtual section must be held by caller.
348 */
349 static void delete_view( struct file_view *view ) /* [in] View */
350 {
351 if (!(view->flags & VFLAG_SYSTEM)) unmap_area( view->base, view->size );
352 list_remove( &view->entry );
353 if (view->mapping) NtClose( view->mapping );
354 free( view );
355 }
356
357
358 /***********************************************************************
359 * create_view
360 *
361 * Create a view. The csVirtual section must be held by caller.
362 */
363 static NTSTATUS create_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
364 {
365 struct file_view *view;
366 struct list *ptr;
367
368 assert( !((unsigned int)base & page_mask) );
369 assert( !(size & page_mask) );
370
371 /* Create the view structure */
372
373 if (!(view = malloc( sizeof(*view) + (size >> page_shift) - 1 ))) return STATUS_NO_MEMORY;
374
375 view->base = base;
376 view->size = size;
377 view->flags = 0;
378 view->mapping = 0;
379 view->protect = vprot;
380 view->handlerProc = NULL;
381 memset( view->prot, vprot, size >> page_shift );
382
383 /* Insert it in the linked list */
384
385 LIST_FOR_EACH( ptr, &views_list )
386 {
387 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
388 if (next->base > base) break;
389 }
390 list_add_before( ptr, &view->entry );
391
392 /* Check for overlapping views. This can happen if the previous view
393 * was a system view that got unmapped behind our back. In that case
394 * we recover by simply deleting it. */
395
396 if ((ptr = list_prev( &views_list, &view->entry )) != NULL)
397 {
398 struct file_view *prev = LIST_ENTRY( ptr, struct file_view, entry );
399 if ((char *)prev->base + prev->size > (char *)base)
400 {
401 TRACE( "overlapping prev view %p-%p for %p-%p\n",
402 prev->base, (char *)prev->base + prev->size,
403 base, (char *)base + view->size );
404 assert( prev->flags & VFLAG_SYSTEM );
405 delete_view( prev );
406 }
407 }
408 if ((ptr = list_next( &views_list, &view->entry )) != NULL)
409 {
410 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
411 if ((char *)base + view->size > (char *)next->base)
412 {
413 TRACE( "overlapping next view %p-%p for %p-%p\n",
414 next->base, (char *)next->base + next->size,
415 base, (char *)base + view->size );
416 assert( next->flags & VFLAG_SYSTEM );
417 delete_view( next );
418 }
419 }
420
421 *view_ret = view;
422 VIRTUAL_DEBUG_DUMP_VIEW( view );
423 return STATUS_SUCCESS;
424 }
425
426
427 /***********************************************************************
428 * VIRTUAL_GetUnixProt
429 *
430 * Convert page protections to protection for mmap/mprotect.
431 */
432 static int VIRTUAL_GetUnixProt( BYTE vprot )
433 {
434 int prot = 0;
435 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
436 {
437 if (vprot & VPROT_READ) prot |= PROT_READ;
438 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
439 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
440 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
441 }
442 return prot;
443 }
444
445
446 /***********************************************************************
447 * VIRTUAL_GetWin32Prot
448 *
449 * Convert page protections to Win32 flags.
450 *
451 * RETURNS
452 * None
453 */
454 static void VIRTUAL_GetWin32Prot(
455 BYTE vprot, /* [in] Page protection flags */
456 DWORD *protect, /* [out] Location to store Win32 protection flags */
457 DWORD *state ) /* [out] Location to store mem state flag */
458 {
459 if (protect) {
460 *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
461 /* if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
462 if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
463
464 if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
465 }
466
467 if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
468 }
469
470
471 /***********************************************************************
472 * VIRTUAL_GetProt
473 *
474 * Build page protections from Win32 flags.
475 *
476 * RETURNS
477 * Value of page protection flags
478 */
479 static BYTE VIRTUAL_GetProt( DWORD protect ) /* [in] Win32 protection flags */
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 "g" (&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 /* map all the sections */
886
887 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
888 {
889 DWORD size;
890
891 /* a few sanity checks */
892 size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
893 if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
894 {
895 ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
896 sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
897 goto error;
898 }
899
900 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
901 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
902 {
903 size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
904 TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
905 sec->Name, ptr + sec->VirtualAddress,
906 sec->PointerToRawData, (int)pos, sec->SizeOfRawData,
907 size, sec->Characteristics );
908 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, size, pos,
909 VPROT_COMMITTED | VPROT_READ | PROT_WRITE,
910 FALSE ) != STATUS_SUCCESS)
911 {
912 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
913 goto error;
914 }
915
916 /* check if the import directory falls inside this section */
917 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
918 imports->VirtualAddress < sec->VirtualAddress + size)
919 {
920 UINT_PTR base = imports->VirtualAddress & ~page_mask;
921 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
922 if (end > sec->VirtualAddress + size) end = sec->VirtualAddress + size;
923 if (end > base)
924 map_file_into_view( view, shared_fd, base, end - base,
925 pos + (base - sec->VirtualAddress),
926 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
927 FALSE );
928 }
929 pos += size;
930 continue;
931 }
932
933 TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
934 sec->Name, ptr + sec->VirtualAddress,
935 sec->PointerToRawData, sec->SizeOfRawData,
936 sec->Characteristics );
937
938 if ((sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) &&
939 !(sec->Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA)) continue;
940 if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
941
942 /* Note: if the section is not aligned properly map_file_into_view will magically
943 * fall back to read(), so we don't need to check anything here.
944 */
945 if (map_file_into_view( view, fd, sec->VirtualAddress, sec->SizeOfRawData, sec->PointerToRawData,
946 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
947 removable ) != STATUS_SUCCESS)
948 {
949 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
950 goto error;
951 }
952
953 if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
954 {
955 DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
956 if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
957 TRACE_(module)("clearing %p - %p\n",
958 ptr + sec->VirtualAddress + sec->SizeOfRawData,
959 ptr + sec->VirtualAddress + end );
960 memset( ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
961 end - sec->SizeOfRawData );
962 }
963 }
964
965
966 /* perform base relocation, if necessary */
967
968 if (ptr != base)
969 {
970 const IMAGE_DATA_DIRECTORY *relocs;
971
972 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
973 if (!relocs->VirtualAddress || !relocs->Size)
974 {
975 if (nt->OptionalHeader.ImageBase == 0x400000) {
976 ERR("Image was mapped at %p: standard load address for a Win32 program (0x00400000) not available\n", ptr);
977 ERR("Do you have exec-shield or prelink active?\n");
978 } else
979 ERR( "FATAL: Need to relocate module from addr %lx, but there are no relocation records\n",
980 nt->OptionalHeader.ImageBase );
981 goto error;
982 }
983
984 /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
985 * really make sure that the *new* base address is also > 2GB.
986 * Some DLLs really check the MSB of the module handle :-/
987 */
988 if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((DWORD)base & 0x80000000))
989 ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
990
991 if (!do_relocations( ptr, relocs, ptr - base, total_size ))
992 {
993 goto error;
994 }
995 }
996
997 if (!removable) /* don't keep handle open on removable media */
998 NtDuplicateObject( GetCurrentProcess(), hmapping,
999 GetCurrentProcess(), &view->mapping,
1000 0, 0, DUPLICATE_SAME_ACCESS );
1001
1002 /* set the image protections */
1003
1004 sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
1005 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1006 {
1007 DWORD size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
1008 BYTE vprot = VPROT_COMMITTED;
1009 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
1010 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_READ|VPROT_WRITECOPY;
1011 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
1012 VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
1013 }
1014 RtlLeaveCriticalSection( &csVirtual );
1015
1016 *addr_ptr = ptr;
1017 return STATUS_SUCCESS;
1018
1019 error:
1020 if (view) delete_view( view );
1021 RtlLeaveCriticalSection( &csVirtual );
1022 return status;
1023 }
1024
1025
1026 /***********************************************************************
1027 * is_current_process
1028 *
1029 * Check whether a process handle is for the current process.
1030 */
1031 BOOL is_current_process( HANDLE handle )
1032 {
1033 BOOL ret = FALSE;
1034
1035 if (handle == GetCurrentProcess()) return TRUE;
1036 SERVER_START_REQ( get_process_info )
1037 {
1038 req->handle = handle;
1039 if (!wine_server_call( req ))
1040 ret = ((DWORD)reply->pid == GetCurrentProcessId());
1041 }
1042 SERVER_END_REQ;
1043 return ret;
1044 }
1045
1046
1047 /***********************************************************************
1048 * virtual_init
1049 */
1050 void virtual_init(void)
1051 {
1052 #ifndef page_mask
1053 page_size = getpagesize();
1054 page_mask = page_size - 1;
1055 /* Make sure we have a power of 2 */
1056 assert( !(page_size & page_mask) );
1057 page_shift = 0;
1058 while ((1 << page_shift) != page_size) page_shift++;
1059 #endif /* page_mask */
1060 }
1061
1062
1063 /***********************************************************************
1064 * VIRTUAL_SetFaultHandler
1065 */
1066 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
1067 {
1068 FILE_VIEW *view;
1069 BOOL ret = FALSE;
1070
1071 RtlEnterCriticalSection( &csVirtual );
1072 if ((view = VIRTUAL_FindView( addr )))
1073 {
1074 view->handlerProc = proc;
1075 view->handlerArg = arg;
1076 ret = TRUE;
1077 }
1078 RtlLeaveCriticalSection( &csVirtual );
1079 return ret;
1080 }
1081
1082 /***********************************************************************
1083 * VIRTUAL_HandleFault
1084 */
1085 DWORD VIRTUAL_HandleFault( LPCVOID addr )
1086 {
1087 FILE_VIEW *view;
1088 DWORD ret = EXCEPTION_ACCESS_VIOLATION;
1089
1090 RtlEnterCriticalSection( &csVirtual );
1091 if ((view = VIRTUAL_FindView( addr )))
1092 {
1093 if (view->handlerProc)
1094 {
1095 HANDLERPROC proc = view->handlerProc;
1096 void *arg = view->handlerArg;
1097 RtlLeaveCriticalSection( &csVirtual );
1098 if (proc( arg, addr )) ret = 0; /* handled */
1099 return ret;
1100 }
1101 else
1102 {
1103 BYTE vprot = view->prot[((const char *)addr - (const char *)view->base) >> page_shift];
1104 void *page = (void *)((UINT_PTR)addr & ~page_mask);
1105 char *stack = NtCurrentTeb()->Tib.StackLimit;
1106 if (vprot & VPROT_GUARD)
1107 {
1108 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
1109 ret = STATUS_GUARD_PAGE_VIOLATION;
1110 }
1111 /* is it inside the stack guard page? */
1112 if (((const char *)addr >= stack) && ((const char *)addr < stack + (page_mask+1)))
1113 ret = STATUS_STACK_OVERFLOW;
1114 }
1115 }
1116 RtlLeaveCriticalSection( &csVirtual );
1117 return ret;
1118 }
1119
1120 /***********************************************************************
1121 * VIRTUAL_HasMapping
1122 *
1123 * Check if the specified view has an associated file mapping.
1124 */
1125 BOOL VIRTUAL_HasMapping( LPCVOID addr )
1126 {
1127 FILE_VIEW *view;
1128 BOOL ret = FALSE;
1129
1130 RtlEnterCriticalSection( &csVirtual );
1131 if ((view = VIRTUAL_FindView( addr ))) ret = (view->mapping != 0);
1132 RtlLeaveCriticalSection( &csVirtual );
1133 return ret;
1134 }
1135
1136
1137 /***********************************************************************
1138 * VIRTUAL_UseLargeAddressSpace
1139 *
1140 * Increase the address space size for apps that support it.
1141 */
1142 void VIRTUAL_UseLargeAddressSpace(void)
1143 {
1144 if (user_space_limit >= ADDRESS_SPACE_LIMIT) return;
1145 RtlEnterCriticalSection( &csVirtual );
1146 remove_reserved_area( user_space_limit, (char *)ADDRESS_SPACE_LIMIT - (char *)user_space_limit );
1147 user_space_limit = ADDRESS_SPACE_LIMIT;
1148 RtlLeaveCriticalSection( &csVirtual );
1149 }
1150
1151
1152 /***********************************************************************
1153 * NtAllocateVirtualMemory (NTDLL.@)
1154 * ZwAllocateVirtualMemory (NTDLL.@)
1155 */
1156 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
1157 ULONG *size_ptr, ULONG type, ULONG protect )
1158 {
1159 void *base;
1160 BYTE vprot;
1161 DWORD size = *size_ptr;
1162 NTSTATUS status = STATUS_SUCCESS;
1163 struct file_view *view;
1164
1165 TRACE("%p %p %08lx %lx %08lx\n", process, *ret, size, type, protect );
1166
1167 if (!size) return STATUS_INVALID_PARAMETER;
1168
1169 if (!is_current_process( process ))
1170 {
1171 ERR("Unsupported on other process\n");
1172 return STATUS_ACCESS_DENIED;
1173 }
1174
1175 /* Round parameters to a page boundary */
1176
1177 if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
1178
1179 if (*ret)
1180 {
1181 if (type & MEM_RESERVE) /* Round down to 64k boundary */
1182 base = ROUND_ADDR( *ret, granularity_mask );
1183 else
1184 base = ROUND_ADDR( *ret, page_mask );
1185 size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1186
1187 /* disallow low 64k, wrap-around and kernel space */
1188 if (((char *)base <= (char *)granularity_mask) ||
1189 ((char *)base + size < (char *)base) ||
1190 is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
1191 return STATUS_INVALID_PARAMETER;
1192 }
1193 else
1194 {
1195 base = NULL;
1196 size = (size + page_mask) & ~page_mask;
1197 }
1198
1199 if (type & MEM_TOP_DOWN) {
1200 /* FIXME: MEM_TOP_DOWN allocates the largest possible address. */
1201 WARN("MEM_TOP_DOWN ignored\n");
1202 type &= ~MEM_TOP_DOWN;
1203 }
1204
1205 if (zero_bits)
1206 WARN("zero_bits %lu ignored\n", zero_bits);
1207
1208 /* Compute the alloc type flags */
1209
1210 if (!(type & MEM_SYSTEM))
1211 {
1212 if (!(type & (MEM_COMMIT | MEM_RESERVE)) || (type & ~(MEM_COMMIT | MEM_RESERVE)))
1213 {
1214 WARN("called with wrong alloc type flags (%08lx) !\n", type);
1215 return STATUS_INVALID_PARAMETER;
1216 }
1217 }
1218 vprot = VIRTUAL_GetProt( protect );
1219 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
1220
1221 /* Reserve the memory */
1222
1223 RtlEnterCriticalSection( &csVirtual );
1224
1225 if (type & MEM_SYSTEM)
1226 {
1227 if (type & MEM_IMAGE) vprot |= VPROT_IMAGE;
1228 status = create_view( &view, base, size, vprot | VPROT_COMMITTED );
1229 if (status == STATUS_SUCCESS)
1230 {
1231 view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
1232 base = view->base;
1233 }
1234 }
1235 else if ((type & MEM_RESERVE) || !base)
1236 {
1237 status = map_view( &view, base, size, vprot );
1238 if (status == STATUS_SUCCESS)
1239 {
1240 view->flags |= VFLAG_VALLOC;
1241 base = view->base;
1242 }
1243 }
1244 else /* commit the pages */
1245 {
1246 if (!(view = VIRTUAL_FindView( base )) ||
1247 ((char *)base + size > (char *)view->base + view->size)) status = STATUS_NOT_MAPPED_VIEW;
1248 else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1249 }
1250
1251 RtlLeaveCriticalSection( &csVirtual );
1252
1253 if (status == STATUS_SUCCESS)
1254 {
1255 *ret = base;
1256 *size_ptr = size;
1257 }
1258 return status;
1259 }
1260
1261
1262 /***********************************************************************
1263 * NtFreeVirtualMemory (NTDLL.@)
1264 * ZwFreeVirtualMemory (NTDLL.@)
1265 */
1266 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, ULONG *size_ptr, ULONG type )
1267 {
1268 FILE_VIEW *view;
1269 char *base;
1270 NTSTATUS status = STATUS_SUCCESS;
1271 LPVOID addr = *addr_ptr;
1272 DWORD size = *size_ptr;
1273
1274 TRACE("%p %p %08lx %lx\n", process, addr, size, type );
1275
1276 if (!is_current_process( process ))
1277 {
1278 ERR("Unsupported on other process\n");
1279 return STATUS_ACCESS_DENIED;
1280 }
1281
1282 /* Fix the parameters */
1283
1284 size = ROUND_SIZE( addr, size );
1285 base = ROUND_ADDR( addr, page_mask );
1286
1287 RtlEnterCriticalSection(&csVirtual);
1288
1289 if (!(view = VIRTUAL_FindView( base )) ||
1290 (base + size > (char *)view->base + view->size) ||
1291 !(view->flags & VFLAG_VALLOC))
1292 {
1293 status = STATUS_INVALID_PARAMETER;
1294 }
1295 else if (type & MEM_SYSTEM)
1296 {
1297 /* return the values that the caller should use to unmap the area */
1298 *addr_ptr = view->base;
1299 *size_ptr = view->size;
1300 view->flags |= VFLAG_SYSTEM;
1301 delete_view( view );
1302 }
1303 else if (type == MEM_RELEASE)
1304 {
1305 /* Free the pages */
1306
1307 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
1308 else
1309 {
1310 delete_view( view );
1311 *addr_ptr = base;
1312 *size_ptr = size;
1313 }
1314 }
1315 else if (type == MEM_DECOMMIT)
1316 {
1317 status = decommit_pages( view, base - (char *)view->base, size );
1318 if (status == STATUS_SUCCESS)
1319 {
1320 *addr_ptr = base;
1321 *size_ptr = size;
1322 }
1323 }
1324 else
1325 {
1326 WARN("called with wrong free type flags (%08lx) !\n", type);
1327 status = STATUS_INVALID_PARAMETER;
1328 }
1329
1330 RtlLeaveCriticalSection(&csVirtual);
1331 return status;
1332 }
1333
1334
1335 /***********************************************************************
1336 * NtProtectVirtualMemory (NTDLL.@)
1337 * ZwProtectVirtualMemory (NTDLL.@)
1338 */
1339 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, ULONG *size_ptr,
1340 ULONG new_prot, ULONG *old_prot )
1341 {
1342 FILE_VIEW *view;
1343 NTSTATUS status = STATUS_SUCCESS;
1344 char *base;
1345 UINT i;
1346 BYTE vprot, *p;
1347 DWORD prot, size = *size_ptr;
1348 LPVOID addr = *addr_ptr;
1349
1350 TRACE("%p %p %08lx %08lx\n", process, addr, size, new_prot );
1351
1352 if (!is_current_process( process ))
1353 {
1354 ERR("Unsupported on other process\n");
1355 return STATUS_ACCESS_DENIED;
1356 }
1357
1358 /* Fix the parameters */
1359
1360 size = ROUND_SIZE( addr, size );
1361 base = ROUND_ADDR( addr, page_mask );
1362
1363 RtlEnterCriticalSection( &csVirtual );
1364
1365 if (!(view = VIRTUAL_FindView( base )) || (base + size > (char *)view->base + view->size))
1366 {
1367 status = STATUS_INVALID_PARAMETER;
1368 }
1369 else
1370 {
1371 /* Make sure all the pages are committed */
1372
1373 p = view->prot + ((base - (char *)view->base) >> page_shift);
1374 VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1375 for (i = size >> page_shift; i; i--, p++)
1376 {
1377 if (!(*p & VPROT_COMMITTED))
1378 {
1379 status = STATUS_NOT_COMMITTED;
1380 break;
1381 }
1382 }
1383 if (!i)
1384 {
1385 if (old_prot) *old_prot = prot;
1386 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1387 if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1388 }
1389 }
1390 RtlLeaveCriticalSection( &csVirtual );
1391
1392 if (status == STATUS_SUCCESS)
1393 {
1394 *addr_ptr = base;
1395 *size_ptr = size;
1396 }
1397 return status;
1398 }
1399
1400
1401 /***********************************************************************
1402 * NtQueryVirtualMemory (NTDLL.@)
1403 * ZwQueryVirtualMemory (NTDLL.@)
1404 */
1405 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
1406 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
1407 ULONG len, ULONG *res_len )
1408 {
1409 FILE_VIEW *view;
1410 char *base, *alloc_base = 0;
1411 struct list *ptr;
1412 UINT size = 0;
1413 MEMORY_BASIC_INFORMATION *info = buffer;
1414
1415 if (info_class != MemoryBasicInformation) return STATUS_INVALID_INFO_CLASS;
1416 if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
1417 return STATUS_WORKING_SET_LIMIT_RANGE;
1418
1419 if (!is_current_process( process ))
1420 {
1421 ERR("Unsupported on other process\n");
1422 return STATUS_ACCESS_DENIED;
1423 }
1424
1425 base = ROUND_ADDR( addr, page_mask );
1426
1427 /* Find the view containing the address */
1428
1429 RtlEnterCriticalSection(&csVirtual);
1430 ptr = list_head( &views_list );
1431 for (;;)
1432 {
1433 if (!ptr)
1434 {
1435 /* make the address space end at the user limit, except if
1436 * the last view was mapped beyond that */
1437 if (alloc_base < (char *)user_space_limit)
1438 {
1439 if (user_space_limit && base >= (char *)user_space_limit)
1440 {
1441 RtlLeaveCriticalSection( &csVirtual );
1442 return STATUS_WORKING_SET_LIMIT_RANGE;
1443 }
1444 size = (char *)user_space_limit - alloc_base;
1445 }
1446 else size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1447 view = NULL;
1448 break;
1449 }
1450 view = LIST_ENTRY( ptr, struct file_view, entry );
1451 if ((char *)view->base > base)
1452 {
1453 size = (char *)view->base - alloc_base;
1454 view = NULL;
1455 break;
1456 }
1457 if ((char *)view->base + view->size > base)
1458 {
1459 alloc_base = view->base;
1460 size = view->size;
1461 break;
1462 }
1463 alloc_base = (char *)view->base + view->size;
1464 ptr = list_next( &views_list, ptr );
1465 }
1466
1467 /* Fill the info structure */
1468
1469 if (!view)
1470 {
1471 info->State = MEM_FREE;
1472 info->Protect = 0;
1473 info->AllocationProtect = 0;
1474 info->Type = 0;
1475 }
1476 else
1477 {
1478 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1479 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1480 for (size = base - alloc_base; size < view->size; size += page_mask+1)
1481 if (view->prot[size >> page_shift] != vprot) break;
1482 VIRTUAL_GetWin32Prot( view->protect, &info->AllocationProtect, NULL );
1483 if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
1484 else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
1485 else info->Type = MEM_MAPPED;
1486 }
1487 RtlLeaveCriticalSection(&csVirtual);
1488
1489 info->BaseAddress = (LPVOID)base;
1490 info->AllocationBase = (LPVOID)alloc_base;
1491 info->RegionSize = size - (base - alloc_base);
1492 if (res_len) *res_len = sizeof(*info);
1493 return STATUS_SUCCESS;
1494 }
1495
1496
1497 /***********************************************************************
1498 * NtLockVirtualMemory (NTDLL.@)
1499 * ZwLockVirtualMemory (NTDLL.@)
1500 */
1501 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, ULONG *size, ULONG unknown )
1502 {
1503 if (!is_current_process( process ))
1504 {
1505 ERR("Unsupported on other process\n");
1506 return STATUS_ACCESS_DENIED;
1507 }
1508 return STATUS_SUCCESS;
1509 }
1510
1511
1512 /***********************************************************************
1513 * NtUnlockVirtualMemory (NTDLL.@)
1514 * ZwUnlockVirtualMemory (NTDLL.@)
1515 */
1516 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, ULONG *size, ULONG unknown )
1517 {
1518 if (!is_current_process( process ))
1519 {
1520 ERR("Unsupported on other process\n");
1521 return STATUS_ACCESS_DENIED;
1522 }
1523 return STATUS_SUCCESS;
1524 }
1525
1526
1527 /***********************************************************************
1528 * NtCreateSection (NTDLL.@)
1529 * ZwCreateSection (NTDLL.@)
1530 */
1531 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
1532 const LARGE_INTEGER *size, ULONG protect,
1533 ULONG sec_flags, HANDLE file )
1534 {
1535 NTSTATUS ret;
1536 BYTE vprot;
1537 DWORD len = attr->ObjectName ? attr->ObjectName->Length : 0;
1538
1539 /* Check parameters */
1540
1541 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1542
1543 vprot = VIRTUAL_GetProt( protect );
1544 if (sec_flags & SEC_RESERVE)
1545 {
1546 if (file) return STATUS_INVALID_PARAMETER;
1547 }
1548 else vprot |= VPROT_COMMITTED;
1549 if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1550 if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
1551
1552 /* Create the server object */
1553
1554 SERVER_START_REQ( create_mapping )
1555 {
1556 req->file_handle = file;
1557 req->size_high = size ? size->u.HighPart : 0;
1558 req->size_low = size ? size->u.LowPart : 0;
1559 req->protect = vprot;
1560 req->access = access;
1561 req->inherit = (attr->Attributes & OBJ_INHERIT) != 0;
1562 if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
1563 ret = wine_server_call( req );
1564 *handle = reply->handle;
1565 }
1566 SERVER_END_REQ;
1567 return ret;
1568 }
1569
1570
1571 /***********************************************************************
1572 * NtOpenSection (NTDLL.@)
1573 * ZwOpenSection (NTDLL.@)
1574 */
1575 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
1576 {
1577 NTSTATUS ret;
1578 DWORD len = attr->ObjectName->Length;
1579
1580 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1581
1582 SERVER_START_REQ( open_mapping )
1583 {
1584 req->access = access;
1585 req->inherit = (attr->Attributes & OBJ_INHERIT) != 0;
1586 wine_server_add_data( req, attr->ObjectName->Buffer, len );
1587 if (!(ret = wine_server_call( req ))) *handle = reply->handle;
1588 }
1589 SERVER_END_REQ;
1590 return ret;
1591 }
1592
1593
1594 /***********************************************************************
1595 * NtMapViewOfSection (NTDLL.@)
1596 * ZwMapViewOfSection (NTDLL.@)
1597 */
1598 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
1599 ULONG commit_size, const LARGE_INTEGER *offset, ULONG *size_ptr,
1600 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
1601 {
1602 IO_STATUS_BLOCK io;
1603 FILE_FS_DEVICE_INFORMATION device_info;
1604 NTSTATUS res;
1605 UINT size = 0;
1606 int unix_handle = -1;
1607 int prot;
1608 void *base;
1609 struct file_view *view;
1610 DWORD size_low, size_high, header_size, shared_size;
1611 HANDLE shared_file;
1612 BOOL removable = FALSE;
1613
1614 TRACE("handle=%p process=%p addr=%p off=%lx%08lx size=%x access=%lx\n",
1615 handle, process, *addr_ptr, offset->u.HighPart, offset->u.LowPart, size, protect );
1616
1617 if (!is_current_process( process ))
1618 {
1619 ERR("Unsupported on other process\n");
1620 return STATUS_ACCESS_DENIED;
1621 }
1622
1623 /* Check parameters */
1624
1625 if ((offset->u.LowPart & granularity_mask) ||
1626 (*addr_ptr && ((UINT_PTR)*addr_ptr & granularity_mask)))
1627 return STATUS_INVALID_PARAMETER;
1628
1629 SERVER_START_REQ( get_mapping_info )
1630 {
1631 req->handle = handle;
1632 res = wine_server_call( req );
1633 prot = reply->protect;
1634 base = reply->base;
1635 size_low = reply->size_low;
1636 size_high = reply->size_high;
1637 header_size = reply->header_size;
1638 shared_file = reply->shared_file;
1639 shared_size = reply->shared_size;
1640 }
1641 SERVER_END_REQ;
1642 if (res) return res;
1643
1644 if ((res = wine_server_handle_to_fd( handle, 0, &unix_handle, NULL ))) return res;
1645
1646 if (NtQueryVolumeInformationFile( handle, &io, &device_info, sizeof(device_info),
1647 FileFsDeviceInformation ) == STATUS_SUCCESS)
1648 removable = device_info.Characteristics & FILE_REMOVABLE_MEDIA;
1649
1650 if (prot & VPROT_IMAGE)
1651 {
1652 if (shared_file)
1653 {
1654 int shared_fd;
1655
1656 if ((res = wine_server_handle_to_fd( shared_file, GENERIC_READ, &shared_fd,
1657 NULL ))) goto done;
1658 res = map_image( handle, unix_handle, base, size_low, header_size,
1659 shared_fd, removable, addr_ptr );
1660 wine_server_release_fd( shared_file, shared_fd );
1661 NtClose( shared_file );
1662 }
1663 else
1664 {
1665 res = map_image( handle, unix_handle, base, size_low, header_size,
1666 -1, removable, addr_ptr );
1667 }
1668 wine_server_release_fd( handle, unix_handle );
1669 if (!res) *size_ptr = size_low;
1670 return res;
1671 }
1672
1673 if (size_high)
1674 ERR("Sizes larger than 4Gb not supported\n");
1675
1676 if ((offset->u.LowPart >= size_low) ||
1677 (*size_ptr > size_low - offset->u.LowPart))
1678 {
1679 res = STATUS_INVALID_PARAMETER;
1680 goto done;
1681 }
1682 if (*size_ptr) size = ROUND_SIZE( offset->u.LowPart, *size_ptr );
1683 else size = size_low - offset->u.LowPart;
1684
1685 switch(protect)
1686 {
1687 case PAGE_NOACCESS:
1688 break;
1689 case PAGE_READWRITE:
1690 case PAGE_EXECUTE_READWRITE:
1691 if (!(prot & VPROT_WRITE))
1692 {
1693 res = STATUS_INVALID_PARAMETER;
1694 goto done;
1695 }
1696 removable = FALSE;
1697 /* fall through */
1698 case PAGE_READONLY:
1699 case PAGE_WRITECOPY:
1700 case PAGE_EXECUTE:
1701 case PAGE_EXECUTE_READ:
1702 case PAGE_EXECUTE_WRITECOPY:
1703 if (prot & VPROT_READ) break;
1704 /* fall through */
1705 default:
1706 res = STATUS_INVALID_PARAMETER;
1707 goto done;
1708 }
1709
1710 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1711 * which has a view of this mapping commits some pages, they will
1712 * appear commited in all other processes, which have the same
1713 * view created. Since we don`t support this yet, we create the
1714 * whole mapping commited.
1715 */
1716 prot |= VPROT_COMMITTED;
1717
1718 /* Reserve a properly aligned area */
1719
1720 RtlEnterCriticalSection( &csVirtual );
1721
1722 res = map_view( &view, *addr_ptr, size, prot );
1723 if (res)
1724 {
1725 RtlLeaveCriticalSection( &csVirtual );
1726 goto done;
1727 }
1728
1729 /* Map the file */
1730
1731 TRACE("handle=%p size=%x offset=%lx%08lx\n",
1732 handle, size, offset->u.HighPart, offset->u.LowPart );
1733
1734 res = map_file_into_view( view, unix_handle, 0, size, offset->QuadPart, prot, removable );
1735 if (res == STATUS_SUCCESS)
1736 {
1737 if (!removable) /* don't keep handle open on removable media */
1738 NtDuplicateObject( GetCurrentProcess(), handle,
1739 GetCurrentProcess(), &view->mapping,
1740 0, 0, DUPLICATE_SAME_ACCESS );
1741
1742 *addr_ptr = view->base;
1743 *size_ptr = size;
1744 }
1745 else
1746 {
1747 ERR( "map_file_into_view %p %x %lx%08lx failed\n",
1748 view->base, size, offset->u.HighPart, offset->u.LowPart );
1749 delete_view( view );
1750 }
1751
1752 RtlLeaveCriticalSection( &csVirtual );
1753
1754 done:
1755 wine_server_release_fd( handle, unix_handle );
1756 return res;
1757 }
1758
1759
1760 /***********************************************************************
1761 * NtUnmapViewOfSection (NTDLL.@)
1762 * ZwUnmapViewOfSection (NTDLL.@)
1763 */
1764 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
1765 {
1766 FILE_VIEW *view;
1767 NTSTATUS status = STATUS_INVALID_PARAMETER;
1768 void *base = ROUND_ADDR( addr, page_mask );
1769
1770 if (!is_current_process( process ))
1771 {
1772 ERR("Unsupported on other process\n");
1773 return STATUS_ACCESS_DENIED;
1774 }
1775 RtlEnterCriticalSection( &csVirtual );
1776 if ((view = VIRTUAL_FindView( base )) && (base == view->base))
1777 {
1778 delete_view( view );
1779 status = STATUS_SUCCESS;
1780 }
1781 RtlLeaveCriticalSection( &csVirtual );
1782 return status;
1783 }
1784
1785
1786 /***********************************************************************
1787 * NtFlushVirtualMemory (NTDLL.@)
1788 * ZwFlushVirtualMemory (NTDLL.@)
1789 */
1790 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
1791 ULONG *size_ptr, ULONG unknown )
1792 {
1793 FILE_VIEW *view;
1794 NTSTATUS status = STATUS_SUCCESS;
1795 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
1796
1797 if (!is_current_process( process ))
1798 {
1799 ERR("Unsupported on other process\n");
1800 return STATUS_ACCESS_DENIED;
1801 }
1802 RtlEnterCriticalSection( &csVirtual );
1803 if (!(view = VIRTUAL_FindView( addr ))) status = STATUS_INVALID_PARAMETER;
1804 else
1805 {
1806 if (!*size_ptr) *size_ptr = view->size;
1807 *addr_ptr = addr;
1808 if (msync( addr, *size_ptr, MS_SYNC )) status = STATUS_NOT_MAPPED_DATA;
1809 }
1810 RtlLeaveCriticalSection( &csVirtual );
1811 return status;
1812 }
1813
1814
1815 /***********************************************************************
1816 * NtReadVirtualMemory (NTDLL.@)
1817 * ZwReadVirtualMemory (NTDLL.@)
1818 */
1819 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
1820 SIZE_T size, SIZE_T *bytes_read )
1821 {
1822 NTSTATUS status;
1823
1824 SERVER_START_REQ( read_process_memory )
1825 {
1826 req->handle = process;
1827 req->addr = (void *)addr;
1828 wine_server_set_reply( req, buffer, size );
1829 if ((status = wine_server_call( req ))) size = 0;
1830 }
1831 SERVER_END_REQ;
1832 if (bytes_read) *bytes_read = size;
1833 return status;
1834 }
1835
1836
1837 /***********************************************************************
1838 * NtWriteVirtualMemory (NTDLL.@)
1839 * ZwWriteVirtualMemory (NTDLL.@)
1840 */
1841 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
1842 SIZE_T size, SIZE_T *bytes_written )
1843 {
1844 static const unsigned int zero;
1845 unsigned int first_offset, last_offset, first_mask, last_mask;
1846 NTSTATUS status;
1847
1848 if (!size) return STATUS_INVALID_PARAMETER;
1849
1850 /* compute the mask for the first int */
1851 first_mask = ~0;
1852 first_offset = (unsigned int)addr % sizeof(int);
1853 memset( &first_mask, 0, first_offset );
1854
1855 /* compute the mask for the last int */
1856 last_offset = (size + first_offset) % sizeof(int);
1857 last_mask = 0;
1858 memset( &last_mask, 0xff, last_offset ? last_offset : sizeof(int) );
1859
1860 SERVER_START_REQ( write_process_memory )
1861 {
1862 req->handle = process;
1863 req->addr = (char *)addr - first_offset;
1864 req->first_mask = first_mask;
1865 req->last_mask = last_mask;
1866 if (first_offset) wine_server_add_data( req, &zero, first_offset );
1867 wine_server_add_data( req, buffer, size );
1868 if (last_offset) wine_server_add_data( req, &zero, sizeof(int) - last_offset );
1869
1870 if ((status = wine_server_call( req ))) size = 0;
1871 }
1872 SERVER_END_REQ;
1873 if (bytes_written) *bytes_written = size;
1874 return status;
1875 }
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