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Load all dll sections no matter what attributes say.
[wine/multimedia.git] / dlls / ntdll / virtual.c
blob62af914cb26aaad2cee6c24a4b30b7c69a34ec70
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 <stdarg.h>
34 #include <stdlib.h>
35 #include <stdio.h>
36 #include <string.h>
37 #include <sys/types.h>
38 #ifdef HAVE_SYS_MMAN_H
39 #include <sys/mman.h>
40 #endif
41
42 #define NONAMELESSUNION
43 #define NONAMELESSSTRUCT
44 #include "ntstatus.h"
45 #include "windef.h"
46 #include "winternl.h"
47 #include "winioctl.h"
48 #include "wine/library.h"
49 #include "wine/server.h"
50 #include "wine/list.h"
51 #include "wine/debug.h"
52 #include "ntdll_misc.h"
53
54 WINE_DEFAULT_DEBUG_CHANNEL(virtual);
55 WINE_DECLARE_DEBUG_CHANNEL(module);
56
57 #ifndef MS_SYNC
58 #define MS_SYNC 0
59 #endif
60
61 #ifndef MAP_NORESERVE
62 #define MAP_NORESERVE 0
63 #endif
64
65 /* File view */
66 typedef struct file_view
67 {
68 struct list entry; /* Entry in global view list */
69 void *base; /* Base address */
70 UINT size; /* Size in bytes */
71 HANDLE mapping; /* Handle to the file mapping */
72 BYTE flags; /* Allocation flags (VFLAG_*) */
73 BYTE protect; /* Protection for all pages at allocation time */
74 BYTE prot[1]; /* Protection byte for each page */
75 } FILE_VIEW;
76
77 /* Per-view flags */
78 #define VFLAG_SYSTEM 0x01 /* system view (underlying mmap not under our control) */
79 #define VFLAG_VALLOC 0x02 /* allocated by VirtualAlloc */
80
81 /* Conversion from VPROT_* to Win32 flags */
82 static const BYTE VIRTUAL_Win32Flags[16] =
83 {
84 PAGE_NOACCESS, /* 0 */
85 PAGE_READONLY, /* READ */
86 PAGE_READWRITE, /* WRITE */
87 PAGE_READWRITE, /* READ | WRITE */
88 PAGE_EXECUTE, /* EXEC */
89 PAGE_EXECUTE_READ, /* READ | EXEC */
90 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
91 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
92 PAGE_WRITECOPY, /* WRITECOPY */
93 PAGE_WRITECOPY, /* READ | WRITECOPY */
94 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
95 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
96 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
97 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
98 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
99 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
100 };
101
102 static struct list views_list = LIST_INIT(views_list);
103
104 static RTL_CRITICAL_SECTION csVirtual;
105 static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
106 {
107 0, 0, &csVirtual,
108 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
109 0, 0, { 0, (DWORD)(__FILE__ ": csVirtual") }
110 };
111 static RTL_CRITICAL_SECTION csVirtual = { &critsect_debug, -1, 0, 0, 0, 0 };
112
113 #ifdef __i386__
114 /* These are always the same on an i386, and it will be faster this way */
115 # define page_mask 0xfff
116 # define page_shift 12
117 # define page_size 0x1000
118 /* Note: these are Windows limits, you cannot change them. */
119 # define ADDRESS_SPACE_LIMIT ((void *)0xc0000000) /* top of the total available address space */
120 # define USER_SPACE_LIMIT ((void *)0x80000000) /* top of the user address space */
121 #else
122 static UINT page_shift;
123 static UINT page_mask;
124 static UINT page_size;
125 # define ADDRESS_SPACE_LIMIT 0 /* no limit needed on other platforms */
126 # define USER_SPACE_LIMIT 0 /* no limit needed on other platforms */
127 #endif /* __i386__ */
128 #define granularity_mask 0xffff /* Allocation granularity (usually 64k) */
129
130 #define ROUND_ADDR(addr,mask) \
131 ((void *)((UINT_PTR)(addr) & ~(mask)))
132
133 #define ROUND_SIZE(addr,size) \
134 (((UINT)(size) + ((UINT_PTR)(addr) & page_mask) + page_mask) & ~page_mask)
135
136 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
137 if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
138
139 static void *user_space_limit = USER_SPACE_LIMIT;
140
141
142 /***********************************************************************
143 * VIRTUAL_GetProtStr
144 */
145 static const char *VIRTUAL_GetProtStr( BYTE prot )
146 {
147 static char buffer[6];
148 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
149 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
150 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
151 buffer[3] = (prot & VPROT_WRITECOPY) ? 'W' : ((prot & VPROT_WRITE) ? 'w' : '-');
152 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
153 buffer[5] = 0;
154 return buffer;
155 }
156
157
158 /***********************************************************************
159 * VIRTUAL_DumpView
160 */
161 static void VIRTUAL_DumpView( FILE_VIEW *view )
162 {
163 UINT i, count;
164 char *addr = view->base;
165 BYTE prot = view->prot[0];
166
167 DPRINTF( "View: %p - %p", addr, addr + view->size - 1 );
168 if (view->flags & VFLAG_SYSTEM)
169 DPRINTF( " (system)\n" );
170 else if (view->flags & VFLAG_VALLOC)
171 DPRINTF( " (valloc)\n" );
172 else if (view->mapping)
173 DPRINTF( " %p\n", view->mapping );
174 else
175 DPRINTF( " (anonymous)\n");
176
177 for (count = i = 1; i < view->size >> page_shift; i++, count++)
178 {
179 if (view->prot[i] == prot) continue;
180 DPRINTF( " %p - %p %s\n",
181 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
182 addr += (count << page_shift);
183 prot = view->prot[i];
184 count = 0;
185 }
186 if (count)
187 DPRINTF( " %p - %p %s\n",
188 addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) );
189 }
190
191
192 /***********************************************************************
193 * VIRTUAL_Dump
194 */
195 void VIRTUAL_Dump(void)
196 {
197 struct file_view *view;
198
199 DPRINTF( "\nDump of all virtual memory views:\n\n" );
200 RtlEnterCriticalSection(&csVirtual);
201 LIST_FOR_EACH_ENTRY( view, &views_list, FILE_VIEW, entry )
202 {
203 VIRTUAL_DumpView( view );
204 }
205 RtlLeaveCriticalSection(&csVirtual);
206 }
207
208
209 /***********************************************************************
210 * VIRTUAL_FindView
211 *
212 * Find the view containing a given address. The csVirtual section must be held by caller.
213 *
214 * PARAMS
215 * addr [I] Address
216 *
217 * RETURNS
218 * View: Success
219 * NULL: Failure
220 */
221 static struct file_view *VIRTUAL_FindView( const void *addr )
222 {
223 struct file_view *view;
224
225 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
226 {
227 if (view->base > addr) break;
228 if ((const char*)view->base + view->size > (const char*)addr) return view;
229 }
230 return NULL;
231 }
232
233
234 /***********************************************************************
235 * find_view_range
236 *
237 * Find the first view overlapping at least part of the specified range.
238 * The csVirtual section must be held by caller.
239 */
240 static struct file_view *find_view_range( const void *addr, size_t size )
241 {
242 struct file_view *view;
243
244 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
245 {
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 file_view *view;
286
287 LIST_FOR_EACH_ENTRY( view, &views_list, struct file_view, entry )
288 {
289 if ((char *)view->base >= (char *)addr + size) break;
290 if ((char *)view->base + view->size <= (char *)addr) continue;
291 /* now we have an overlapping view */
292 if (view->base > addr)
293 {
294 wine_mmap_remove_reserved_area( addr, (char *)view->base - (char *)addr, TRUE );
295 size -= (char *)view->base - (char *)addr;
296 addr = view->base;
297 }
298 if ((char *)view->base + view->size >= (char *)addr + size)
299 {
300 /* view covers all the remaining area */
301 wine_mmap_remove_reserved_area( addr, size, FALSE );
302 size = 0;
303 break;
304 }
305 else /* view covers only part of the area */
306 {
307 wine_mmap_remove_reserved_area( addr, (char *)view->base + view->size - (char *)addr, FALSE );
308 size -= (char *)view->base + view->size - (char *)addr;
309 addr = (char *)view->base + view->size;
310 }
311 }
312 /* remove remaining space */
313 if (size) wine_mmap_remove_reserved_area( addr, size, TRUE );
314 }
315
316
317 /***********************************************************************
318 * is_beyond_limit
319 *
320 * Check if an address range goes beyond a given limit.
321 */
322 static inline int is_beyond_limit( void *addr, size_t size, void *limit )
323 {
324 return (limit && (addr >= limit || (char *)addr + size > (char *)limit));
325 }
326
327
328 /***********************************************************************
329 * unmap_area
330 *
331 * Unmap an area, or simply replace it by an empty mapping if it is
332 * in a reserved area. The csVirtual section must be held by caller.
333 */
334 static inline void unmap_area( void *addr, size_t size )
335 {
336 if (wine_mmap_is_in_reserved_area( addr, size ))
337 wine_anon_mmap( addr, size, PROT_NONE, MAP_NORESERVE | MAP_FIXED );
338 else
339 munmap( addr, size );
340 }
341
342
343 /***********************************************************************
344 * delete_view
345 *
346 * Deletes a view. The csVirtual section must be held by caller.
347 */
348 static void delete_view( struct file_view *view ) /* [in] View */
349 {
350 if (!(view->flags & VFLAG_SYSTEM)) unmap_area( view->base, view->size );
351 list_remove( &view->entry );
352 if (view->mapping) NtClose( view->mapping );
353 free( view );
354 }
355
356
357 /***********************************************************************
358 * create_view
359 *
360 * Create a view. The csVirtual section must be held by caller.
361 */
362 static NTSTATUS create_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
363 {
364 struct file_view *view;
365 struct list *ptr;
366
367 assert( !((unsigned int)base & page_mask) );
368 assert( !(size & page_mask) );
369
370 /* Create the view structure */
371
372 if (!(view = malloc( sizeof(*view) + (size >> page_shift) - 1 ))) return STATUS_NO_MEMORY;
373
374 view->base = base;
375 view->size = size;
376 view->flags = 0;
377 view->mapping = 0;
378 view->protect = vprot;
379 memset( view->prot, vprot, size >> page_shift );
380
381 /* Insert it in the linked list */
382
383 LIST_FOR_EACH( ptr, &views_list )
384 {
385 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
386 if (next->base > base) break;
387 }
388 list_add_before( ptr, &view->entry );
389
390 /* Check for overlapping views. This can happen if the previous view
391 * was a system view that got unmapped behind our back. In that case
392 * we recover by simply deleting it. */
393
394 if ((ptr = list_prev( &views_list, &view->entry )) != NULL)
395 {
396 struct file_view *prev = LIST_ENTRY( ptr, struct file_view, entry );
397 if ((char *)prev->base + prev->size > (char *)base)
398 {
399 TRACE( "overlapping prev view %p-%p for %p-%p\n",
400 prev->base, (char *)prev->base + prev->size,
401 base, (char *)base + view->size );
402 assert( prev->flags & VFLAG_SYSTEM );
403 delete_view( prev );
404 }
405 }
406 if ((ptr = list_next( &views_list, &view->entry )) != NULL)
407 {
408 struct file_view *next = LIST_ENTRY( ptr, struct file_view, entry );
409 if ((char *)base + view->size > (char *)next->base)
410 {
411 TRACE( "overlapping next view %p-%p for %p-%p\n",
412 next->base, (char *)next->base + next->size,
413 base, (char *)base + view->size );
414 assert( next->flags & VFLAG_SYSTEM );
415 delete_view( next );
416 }
417 }
418
419 *view_ret = view;
420 VIRTUAL_DEBUG_DUMP_VIEW( view );
421 return STATUS_SUCCESS;
422 }
423
424
425 /***********************************************************************
426 * VIRTUAL_GetUnixProt
427 *
428 * Convert page protections to protection for mmap/mprotect.
429 */
430 static int VIRTUAL_GetUnixProt( BYTE vprot )
431 {
432 int prot = 0;
433 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
434 {
435 if (vprot & VPROT_READ) prot |= PROT_READ;
436 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
437 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
438 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
439 }
440 return prot;
441 }
442
443
444 /***********************************************************************
445 * VIRTUAL_GetWin32Prot
446 *
447 * Convert page protections to Win32 flags.
448 *
449 * RETURNS
450 * None
451 */
452 static void VIRTUAL_GetWin32Prot(
453 BYTE vprot, /* [in] Page protection flags */
454 DWORD *protect, /* [out] Location to store Win32 protection flags */
455 DWORD *state ) /* [out] Location to store mem state flag */
456 {
457 if (protect) {
458 *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
459 if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
460 if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS | PAGE_GUARD;
461 }
462
463 if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
464 }
465
466
467 /***********************************************************************
468 * VIRTUAL_GetProt
469 *
470 * Build page protections from Win32 flags.
471 *
472 * PARAMS
473 * protect [I] Win32 protection flags
474 *
475 * RETURNS
476 * Value of page protection flags
477 */
478 static BYTE VIRTUAL_GetProt( DWORD protect )
479 {
480 BYTE vprot;
481
482 switch(protect & 0xff)
483 {
484 case PAGE_READONLY:
485 vprot = VPROT_READ;
486 break;
487 case PAGE_READWRITE:
488 vprot = VPROT_READ | VPROT_WRITE;
489 break;
490 case PAGE_WRITECOPY:
491 /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
492 * that the hFile must have been opened with GENERIC_READ and
493 * GENERIC_WRITE access. This is WRONG as tests show that you
494 * only need GENERIC_READ access (at least for Win9x,
495 * FIXME: what about NT?). Thus, we don't put VPROT_WRITE in
496 * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
497 */
498 vprot = VPROT_READ | VPROT_WRITECOPY;
499 break;
500 case PAGE_EXECUTE:
501 vprot = VPROT_EXEC;
502 break;
503 case PAGE_EXECUTE_READ:
504 vprot = VPROT_EXEC | VPROT_READ;
505 break;
506 case PAGE_EXECUTE_READWRITE:
507 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
508 break;
509 case PAGE_EXECUTE_WRITECOPY:
510 /* See comment for PAGE_WRITECOPY above */
511 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
512 break;
513 case PAGE_NOACCESS:
514 default:
515 vprot = 0;
516 break;
517 }
518 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
519 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
520 return vprot;
521 }
522
523
524 /***********************************************************************
525 * VIRTUAL_SetProt
526 *
527 * Change the protection of a range of pages.
528 *
529 * RETURNS
530 * TRUE: Success
531 * FALSE: Failure
532 */
533 static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */
534 void *base, /* [in] Starting address */
535 UINT size, /* [in] Size in bytes */
536 BYTE vprot ) /* [in] Protections to use */
537 {
538 TRACE("%p-%p %s\n",
539 base, (char *)base + size - 1, VIRTUAL_GetProtStr( vprot ) );
540
541 if (mprotect( base, size, VIRTUAL_GetUnixProt(vprot) ))
542 return FALSE; /* FIXME: last error */
543
544 memset( view->prot + (((char *)base - (char *)view->base) >> page_shift),
545 vprot, size >> page_shift );
546 VIRTUAL_DEBUG_DUMP_VIEW( view );
547 return TRUE;
548 }
549
550
551 /***********************************************************************
552 * map_view
553 *
554 * Create a view and mmap the corresponding memory area.
555 * The csVirtual section must be held by caller.
556 */
557 static NTSTATUS map_view( struct file_view **view_ret, void *base, size_t size, BYTE vprot )
558 {
559 void *ptr;
560 NTSTATUS status;
561
562 if (base)
563 {
564 if (is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
565 return STATUS_WORKING_SET_LIMIT_RANGE;
566
567 switch (wine_mmap_is_in_reserved_area( base, size ))
568 {
569 case -1: /* partially in a reserved area */
570 return STATUS_CONFLICTING_ADDRESSES;
571
572 case 0: /* not in a reserved area, do a normal allocation */
573 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
574 {
575 if (errno == ENOMEM) return STATUS_NO_MEMORY;
576 return STATUS_INVALID_PARAMETER;
577 }
578 if (ptr != base)
579 {
580 /* We couldn't get the address we wanted */
581 if (is_beyond_limit( ptr, size, user_space_limit )) add_reserved_area( ptr, size );
582 else munmap( ptr, size );
583 return STATUS_CONFLICTING_ADDRESSES;
584 }
585 break;
586
587 default:
588 case 1: /* in a reserved area, make sure the address is available */
589 if (find_view_range( base, size )) return STATUS_CONFLICTING_ADDRESSES;
590 /* replace the reserved area by our mapping */
591 if ((ptr = wine_anon_mmap( base, size, VIRTUAL_GetUnixProt(vprot), MAP_FIXED )) != base)
592 return STATUS_INVALID_PARAMETER;
593 break;
594 }
595 }
596 else
597 {
598 size_t view_size = size + granularity_mask + 1;
599
600 for (;;)
601 {
602 if ((ptr = wine_anon_mmap( NULL, view_size, VIRTUAL_GetUnixProt(vprot), 0 )) == (void *)-1)
603 {
604 if (errno == ENOMEM) return STATUS_NO_MEMORY;
605 return STATUS_INVALID_PARAMETER;
606 }
607 /* if we got something beyond the user limit, unmap it and retry */
608 if (is_beyond_limit( ptr, view_size, user_space_limit )) add_reserved_area( ptr, view_size );
609 else break;
610 }
611
612 /* Release the extra memory while keeping the range
613 * starting on the granularity boundary. */
614 if ((unsigned int)ptr & granularity_mask)
615 {
616 unsigned int extra = granularity_mask + 1 - ((unsigned int)ptr & granularity_mask);
617 munmap( ptr, extra );
618 ptr = (char *)ptr + extra;
619 view_size -= extra;
620 }
621 if (view_size > size)
622 munmap( (char *)ptr + size, view_size - size );
623 }
624
625 status = create_view( view_ret, ptr, size, vprot );
626 if (status != STATUS_SUCCESS) unmap_area( ptr, size );
627 return status;
628 }
629
630
631 /***********************************************************************
632 * unaligned_mmap
633 *
634 * Linux kernels before 2.4.x can support non page-aligned offsets, as
635 * long as the offset is aligned to the filesystem block size. This is
636 * a big performance gain so we want to take advantage of it.
637 *
638 * However, when we use 64-bit file support this doesn't work because
639 * glibc rejects unaligned offsets. Also glibc 2.1.3 mmap64 is broken
640 * in that it rounds unaligned offsets down to a page boundary. For
641 * these reasons we do a direct system call here.
642 */
643 static void *unaligned_mmap( void *addr, size_t length, unsigned int prot,
644 unsigned int flags, int fd, off_t offset )
645 {
646 #if defined(linux) && defined(__i386__) && defined(__GNUC__)
647 if (!(offset >> 32) && (offset & page_mask))
648 {
649 int ret;
650
651 struct
652 {
653 void *addr;
654 unsigned int length;
655 unsigned int prot;
656 unsigned int flags;
657 unsigned int fd;
658 unsigned int offset;
659 } args;
660
661 args.addr = addr;
662 args.length = length;
663 args.prot = prot;
664 args.flags = flags;
665 args.fd = fd;
666 args.offset = offset;
667
668 __asm__ __volatile__("push %%ebx\n\t"
669 "movl %2,%%ebx\n\t"
670 "int $0x80\n\t"
671 "popl %%ebx"
672 : "=a" (ret)
673 : "0" (90), /* SYS_mmap */
674 "q" (&args)
675 : "memory" );
676 if (ret < 0 && ret > -4096)
677 {
678 errno = -ret;
679 ret = -1;
680 }
681 return (void *)ret;
682 }
683 #endif
684 return mmap( addr, length, prot, flags, fd, offset );
685 }
686
687
688 /***********************************************************************
689 * map_file_into_view
690 *
691 * Wrapper for mmap() to map a file into a view, falling back to read if mmap fails.
692 * The csVirtual section must be held by caller.
693 */
694 static NTSTATUS map_file_into_view( struct file_view *view, int fd, size_t start, size_t size,
695 off_t offset, BYTE vprot, BOOL removable )
696 {
697 void *ptr;
698 int prot = VIRTUAL_GetUnixProt( vprot );
699 BOOL shared_write = (vprot & VPROT_WRITE) != 0;
700
701 assert( start < view->size );
702 assert( start + size <= view->size );
703
704 /* only try mmap if media is not removable (or if we require write access) */
705 if (!removable || shared_write)
706 {
707 int flags = MAP_FIXED | (shared_write ? MAP_SHARED : MAP_PRIVATE);
708
709 if (unaligned_mmap( (char *)view->base + start, size, prot, flags, fd, offset ) != (void *)-1)
710 goto done;
711
712 /* mmap() failed; if this is because the file offset is not */
713 /* page-aligned (EINVAL), or because the underlying filesystem */
714 /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
715 if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return FILE_GetNtStatus();
716 if (shared_write) return FILE_GetNtStatus(); /* we cannot fake shared write mappings */
717 }
718
719 /* Reserve the memory with an anonymous mmap */
720 ptr = wine_anon_mmap( (char *)view->base + start, size, PROT_READ | PROT_WRITE, MAP_FIXED );
721 if (ptr == (void *)-1) return FILE_GetNtStatus();
722 /* Now read in the file */
723 pread( fd, ptr, size, offset );
724 if (prot != (PROT_READ|PROT_WRITE)) mprotect( ptr, size, prot ); /* Set the right protection */
725 done:
726 memset( view->prot + (start >> page_shift), vprot, size >> page_shift );
727 return STATUS_SUCCESS;
728 }
729
730
731 /***********************************************************************
732 * decommit_view
733 *
734 * Decommit some pages of a given view.
735 * The csVirtual section must be held by caller.
736 */
737 static NTSTATUS decommit_pages( struct file_view *view, size_t start, size_t size )
738 {
739 if (wine_anon_mmap( (char *)view->base + start, size, PROT_NONE, MAP_FIXED ) != (void *)-1)
740 {
741 BYTE *p = view->prot + (start >> page_shift);
742 size >>= page_shift;
743 while (size--) *p++ &= ~VPROT_COMMITTED;
744 return STATUS_SUCCESS;
745 }
746 return FILE_GetNtStatus();
747 }
748
749
750 /***********************************************************************
751 * do_relocations
752 *
753 * Apply the relocations to a mapped PE image
754 */
755 static int do_relocations( char *base, const IMAGE_DATA_DIRECTORY *dir,
756 int delta, DWORD total_size )
757 {
758 IMAGE_BASE_RELOCATION *rel;
759
760 TRACE_(module)( "relocating from %p-%p to %p-%p\n",
761 base - delta, base - delta + total_size, base, base + total_size );
762
763 for (rel = (IMAGE_BASE_RELOCATION *)(base + dir->VirtualAddress);
764 ((char *)rel < base + dir->VirtualAddress + dir->Size) && rel->SizeOfBlock;
765 rel = (IMAGE_BASE_RELOCATION*)((char*)rel + rel->SizeOfBlock) )
766 {
767 char *page = base + rel->VirtualAddress;
768 WORD *TypeOffset = (WORD *)(rel + 1);
769 int i, count = (rel->SizeOfBlock - sizeof(*rel)) / sizeof(*TypeOffset);
770
771 if (!count) continue;
772
773 /* sanity checks */
774 if ((char *)rel + rel->SizeOfBlock > base + dir->VirtualAddress + dir->Size ||
775 page > base + total_size)
776 {
777 ERR_(module)("invalid relocation %p,%lx,%ld at %p,%lx,%lx\n",
778 rel, rel->VirtualAddress, rel->SizeOfBlock,
779 base, dir->VirtualAddress, dir->Size );
780 return 0;
781 }
782
783 TRACE_(module)("%ld relocations for page %lx\n", rel->SizeOfBlock, rel->VirtualAddress);
784
785 /* patching in reverse order */
786 for (i = 0 ; i < count; i++)
787 {
788 int offset = TypeOffset[i] & 0xFFF;
789 int type = TypeOffset[i] >> 12;
790 switch(type)
791 {
792 case IMAGE_REL_BASED_ABSOLUTE:
793 break;
794 case IMAGE_REL_BASED_HIGH:
795 *(short*)(page+offset) += HIWORD(delta);
796 break;
797 case IMAGE_REL_BASED_LOW:
798 *(short*)(page+offset) += LOWORD(delta);
799 break;
800 case IMAGE_REL_BASED_HIGHLOW:
801 *(int*)(page+offset) += delta;
802 /* FIXME: if this is an exported address, fire up enhanced logic */
803 break;
804 default:
805 FIXME_(module)("Unknown/unsupported fixup type %d.\n", type);
806 break;
807 }
808 }
809 }
810 return 1;
811 }
812
813
814 /***********************************************************************
815 * map_image
816 *
817 * Map an executable (PE format) image into memory.
818 */
819 static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
820 DWORD header_size, int shared_fd, BOOL removable, PVOID *addr_ptr )
821 {
822 IMAGE_DOS_HEADER *dos;
823 IMAGE_NT_HEADERS *nt;
824 IMAGE_SECTION_HEADER *sec;
825 IMAGE_DATA_DIRECTORY *imports;
826 NTSTATUS status = STATUS_CONFLICTING_ADDRESSES;
827 int i;
828 off_t pos;
829 struct file_view *view = NULL;
830 char *ptr;
831
832 /* zero-map the whole range */
833
834 RtlEnterCriticalSection( &csVirtual );
835
836 if (base >= (char *)0x110000) /* make sure the DOS area remains free */
837 status = map_view( &view, base, total_size,
838 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
839
840 if (status == STATUS_CONFLICTING_ADDRESSES)
841 status = map_view( &view, NULL, total_size,
842 VPROT_COMMITTED | VPROT_READ | VPROT_EXEC | VPROT_WRITECOPY | VPROT_IMAGE );
843
844 if (status != STATUS_SUCCESS) goto error;
845
846 ptr = view->base;
847 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
848
849 /* map the header */
850
851 status = STATUS_INVALID_IMAGE_FORMAT; /* generic error */
852 if (map_file_into_view( view, fd, 0, header_size, 0, VPROT_COMMITTED | VPROT_READ,
853 removable ) != STATUS_SUCCESS) goto error;
854 dos = (IMAGE_DOS_HEADER *)ptr;
855 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
856 if ((char *)(nt + 1) > ptr + header_size) goto error;
857
858 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
859 if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
860
861 imports = nt->OptionalHeader.DataDirectory + IMAGE_DIRECTORY_ENTRY_IMPORT;
862 if (!imports->Size || !imports->VirtualAddress) imports = NULL;
863
864 /* check the architecture */
865
866 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
867 {
868 MESSAGE("Trying to load PE image for unsupported architecture (");
869 switch (nt->FileHeader.Machine)
870 {
871 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
872 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
873 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
874 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
875 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
876 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
877 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
878 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
879 }
880 MESSAGE(")\n");
881 goto error;
882 }
883
884 /* check for non page-aligned binary */
885
886 if (nt->OptionalHeader.SectionAlignment <= page_mask)
887 {
888 /* unaligned sections, this happens for native subsystem binaries */
889 /* in that case Windows simply maps in the whole file */
890
891 if (map_file_into_view( view, fd, 0, total_size, 0, VPROT_COMMITTED | VPROT_READ,
892 removable ) != STATUS_SUCCESS) goto error;
893
894 /* check that all sections are loaded at the right offset */
895 for (i = 0; i < nt->FileHeader.NumberOfSections; i++)
896 {
897 if (sec[i].VirtualAddress != sec[i].PointerToRawData)
898 goto error; /* Windows refuses to load in that case too */
899 }
900
901 /* set the image protections */
902 VIRTUAL_SetProt( view, ptr, total_size,
903 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY | VPROT_EXEC );
904
905 /* perform relocations if necessary */
906 /* FIXME: not 100% compatible, Windows doesn't do this for non page-aligned binaries */
907 if (ptr != base)
908 {
909 const IMAGE_DATA_DIRECTORY *relocs;
910 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
911 if (relocs->VirtualAddress && relocs->Size)
912 do_relocations( ptr, relocs, ptr - base, total_size );
913 }
914
915 goto done;
916 }
917
918
919 /* map all the sections */
920
921 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
922 {
923 DWORD size;
924
925 /* a few sanity checks */
926 size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
927 if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
928 {
929 ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
930 sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
931 goto error;
932 }
933
934 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
935 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
936 {
937 size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
938 TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
939 sec->Name, ptr + sec->VirtualAddress,
940 sec->PointerToRawData, (int)pos, sec->SizeOfRawData,
941 size, sec->Characteristics );
942 if (map_file_into_view( view, shared_fd, sec->VirtualAddress, size, pos,
943 VPROT_COMMITTED | VPROT_READ | PROT_WRITE,
944 FALSE ) != STATUS_SUCCESS)
945 {
946 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
947 goto error;
948 }
949
950 /* check if the import directory falls inside this section */
951 if (imports && imports->VirtualAddress >= sec->VirtualAddress &&
952 imports->VirtualAddress < sec->VirtualAddress + size)
953 {
954 UINT_PTR base = imports->VirtualAddress & ~page_mask;
955 UINT_PTR end = base + ROUND_SIZE( imports->VirtualAddress, imports->Size );
956 if (end > sec->VirtualAddress + size) end = sec->VirtualAddress + size;
957 if (end > base)
958 map_file_into_view( view, shared_fd, base, end - base,
959 pos + (base - sec->VirtualAddress),
960 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
961 FALSE );
962 }
963 pos += size;
964 continue;
965 }
966
967 TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
968 sec->Name, ptr + sec->VirtualAddress,
969 sec->PointerToRawData, sec->SizeOfRawData,
970 sec->Characteristics );
971
972 if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
973
974 /* Note: if the section is not aligned properly map_file_into_view will magically
975 * fall back to read(), so we don't need to check anything here.
976 */
977 if (map_file_into_view( view, fd, sec->VirtualAddress, sec->SizeOfRawData, sec->PointerToRawData,
978 VPROT_COMMITTED | VPROT_READ | VPROT_WRITECOPY,
979 removable ) != STATUS_SUCCESS)
980 {
981 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
982 goto error;
983 }
984
985 if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
986 {
987 DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
988 if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
989 TRACE_(module)("clearing %p - %p\n",
990 ptr + sec->VirtualAddress + sec->SizeOfRawData,
991 ptr + sec->VirtualAddress + end );
992 memset( ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
993 end - sec->SizeOfRawData );
994 }
995 }
996
997
998 /* perform base relocation, if necessary */
999
1000 if (ptr != base)
1001 {
1002 const IMAGE_DATA_DIRECTORY *relocs;
1003
1004 relocs = &nt->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
1005 if (!relocs->VirtualAddress || !relocs->Size)
1006 {
1007 if (nt->OptionalHeader.ImageBase == 0x400000) {
1008 ERR("Image was mapped at %p: standard load address for a Win32 program (0x00400000) not available\n", ptr);
1009 ERR("Do you have exec-shield or prelink active?\n");
1010 } else
1011 ERR( "FATAL: Need to relocate module from addr %lx, but there are no relocation records\n",
1012 nt->OptionalHeader.ImageBase );
1013 goto error;
1014 }
1015
1016 /* FIXME: If we need to relocate a system DLL (base > 2GB) we should
1017 * really make sure that the *new* base address is also > 2GB.
1018 * Some DLLs really check the MSB of the module handle :-/
1019 */
1020 if ((nt->OptionalHeader.ImageBase & 0x80000000) && !((DWORD)base & 0x80000000))
1021 ERR( "Forced to relocate system DLL (base > 2GB). This is not good.\n" );
1022
1023 if (!do_relocations( ptr, relocs, ptr - base, total_size ))
1024 {
1025 goto error;
1026 }
1027 }
1028
1029 /* set the image protections */
1030
1031 sec = (IMAGE_SECTION_HEADER*)((char *)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
1032 for (i = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
1033 {
1034 DWORD size = ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
1035 BYTE vprot = VPROT_COMMITTED;
1036 if (sec->Characteristics & IMAGE_SCN_MEM_READ) vprot |= VPROT_READ;
1037 if (sec->Characteristics & IMAGE_SCN_MEM_WRITE) vprot |= VPROT_READ|VPROT_WRITECOPY;
1038 if (sec->Characteristics & IMAGE_SCN_MEM_EXECUTE) vprot |= VPROT_EXEC;
1039 VIRTUAL_SetProt( view, ptr + sec->VirtualAddress, size, vprot );
1040 }
1041
1042 done:
1043 if (!removable) /* don't keep handle open on removable media */
1044 NtDuplicateObject( NtCurrentProcess(), hmapping,
1045 NtCurrentProcess(), &view->mapping,
1046 0, 0, DUPLICATE_SAME_ACCESS );
1047
1048 RtlLeaveCriticalSection( &csVirtual );
1049
1050 *addr_ptr = ptr;
1051 return STATUS_SUCCESS;
1052
1053 error:
1054 if (view) delete_view( view );
1055 RtlLeaveCriticalSection( &csVirtual );
1056 return status;
1057 }
1058
1059
1060 /***********************************************************************
1061 * is_current_process
1062 *
1063 * Check whether a process handle is for the current process.
1064 */
1065 BOOL is_current_process( HANDLE handle )
1066 {
1067 BOOL ret = FALSE;
1068
1069 if (handle == NtCurrentProcess()) return TRUE;
1070 SERVER_START_REQ( get_process_info )
1071 {
1072 req->handle = handle;
1073 if (!wine_server_call( req ))
1074 ret = ((DWORD)reply->pid == GetCurrentProcessId());
1075 }
1076 SERVER_END_REQ;
1077 return ret;
1078 }
1079
1080
1081 /***********************************************************************
1082 * virtual_init
1083 */
1084 void virtual_init(void)
1085 {
1086 #ifndef page_mask
1087 page_size = getpagesize();
1088 page_mask = page_size - 1;
1089 /* Make sure we have a power of 2 */
1090 assert( !(page_size & page_mask) );
1091 page_shift = 0;
1092 while ((1 << page_shift) != page_size) page_shift++;
1093 #endif /* page_mask */
1094 }
1095
1096
1097 /***********************************************************************
1098 * VIRTUAL_HandleFault
1099 */
1100 DWORD VIRTUAL_HandleFault( LPCVOID addr )
1101 {
1102 FILE_VIEW *view;
1103 DWORD ret = EXCEPTION_ACCESS_VIOLATION;
1104
1105 RtlEnterCriticalSection( &csVirtual );
1106 if ((view = VIRTUAL_FindView( addr )))
1107 {
1108 BYTE vprot = view->prot[((const char *)addr - (const char *)view->base) >> page_shift];
1109 void *page = (void *)((UINT_PTR)addr & ~page_mask);
1110 char *stack = NtCurrentTeb()->Tib.StackLimit;
1111 if (vprot & VPROT_GUARD)
1112 {
1113 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
1114 ret = STATUS_GUARD_PAGE_VIOLATION;
1115 }
1116 /* is it inside the stack guard page? */
1117 if (((const char *)addr >= stack) && ((const char *)addr < stack + (page_mask+1)))
1118 ret = STATUS_STACK_OVERFLOW;
1119 }
1120 RtlLeaveCriticalSection( &csVirtual );
1121 return ret;
1122 }
1123
1124 /***********************************************************************
1125 * VIRTUAL_HasMapping
1126 *
1127 * Check if the specified view has an associated file mapping.
1128 */
1129 BOOL VIRTUAL_HasMapping( LPCVOID addr )
1130 {
1131 FILE_VIEW *view;
1132 BOOL ret = FALSE;
1133
1134 RtlEnterCriticalSection( &csVirtual );
1135 if ((view = VIRTUAL_FindView( addr ))) ret = (view->mapping != 0);
1136 RtlLeaveCriticalSection( &csVirtual );
1137 return ret;
1138 }
1139
1140
1141 /***********************************************************************
1142 * VIRTUAL_UseLargeAddressSpace
1143 *
1144 * Increase the address space size for apps that support it.
1145 */
1146 void VIRTUAL_UseLargeAddressSpace(void)
1147 {
1148 if (user_space_limit >= ADDRESS_SPACE_LIMIT) return;
1149 RtlEnterCriticalSection( &csVirtual );
1150 remove_reserved_area( user_space_limit, (char *)ADDRESS_SPACE_LIMIT - (char *)user_space_limit );
1151 user_space_limit = ADDRESS_SPACE_LIMIT;
1152 RtlLeaveCriticalSection( &csVirtual );
1153 }
1154
1155
1156 /***********************************************************************
1157 * NtAllocateVirtualMemory (NTDLL.@)
1158 * ZwAllocateVirtualMemory (NTDLL.@)
1159 */
1160 NTSTATUS WINAPI NtAllocateVirtualMemory( HANDLE process, PVOID *ret, ULONG zero_bits,
1161 ULONG *size_ptr, ULONG type, ULONG protect )
1162 {
1163 void *base;
1164 BYTE vprot;
1165 DWORD size = *size_ptr;
1166 NTSTATUS status = STATUS_SUCCESS;
1167 struct file_view *view;
1168
1169 TRACE("%p %p %08lx %lx %08lx\n", process, *ret, size, type, protect );
1170
1171 if (!size) return STATUS_INVALID_PARAMETER;
1172
1173 if (!is_current_process( process ))
1174 {
1175 ERR("Unsupported on other process\n");
1176 return STATUS_ACCESS_DENIED;
1177 }
1178
1179 /* Round parameters to a page boundary */
1180
1181 if (size > 0x7fc00000) return STATUS_WORKING_SET_LIMIT_RANGE; /* 2Gb - 4Mb */
1182
1183 if (*ret)
1184 {
1185 if (type & MEM_RESERVE) /* Round down to 64k boundary */
1186 base = ROUND_ADDR( *ret, granularity_mask );
1187 else
1188 base = ROUND_ADDR( *ret, page_mask );
1189 size = (((UINT_PTR)*ret + size + page_mask) & ~page_mask) - (UINT_PTR)base;
1190
1191 /* disallow low 64k, wrap-around and kernel space */
1192 if (((char *)base <= (char *)granularity_mask) ||
1193 ((char *)base + size < (char *)base) ||
1194 is_beyond_limit( base, size, ADDRESS_SPACE_LIMIT ))
1195 return STATUS_INVALID_PARAMETER;
1196 }
1197 else
1198 {
1199 base = NULL;
1200 size = (size + page_mask) & ~page_mask;
1201 }
1202
1203 if (type & MEM_TOP_DOWN) {
1204 /* FIXME: MEM_TOP_DOWN allocates the largest possible address. */
1205 WARN("MEM_TOP_DOWN ignored\n");
1206 type &= ~MEM_TOP_DOWN;
1207 }
1208
1209 if (zero_bits)
1210 WARN("zero_bits %lu ignored\n", zero_bits);
1211
1212 /* Compute the alloc type flags */
1213
1214 if (!(type & MEM_SYSTEM))
1215 {
1216 if (!(type & (MEM_COMMIT | MEM_RESERVE)) || (type & ~(MEM_COMMIT | MEM_RESERVE)))
1217 {
1218 WARN("called with wrong alloc type flags (%08lx) !\n", type);
1219 return STATUS_INVALID_PARAMETER;
1220 }
1221 }
1222 vprot = VIRTUAL_GetProt( protect );
1223 if (type & MEM_COMMIT) vprot |= VPROT_COMMITTED;
1224
1225 /* Reserve the memory */
1226
1227 RtlEnterCriticalSection( &csVirtual );
1228
1229 if (type & MEM_SYSTEM)
1230 {
1231 if (type & MEM_IMAGE) vprot |= VPROT_IMAGE;
1232 status = create_view( &view, base, size, vprot | VPROT_COMMITTED );
1233 if (status == STATUS_SUCCESS)
1234 {
1235 view->flags |= VFLAG_VALLOC | VFLAG_SYSTEM;
1236 base = view->base;
1237 }
1238 }
1239 else if ((type & MEM_RESERVE) || !base)
1240 {
1241 status = map_view( &view, base, size, vprot );
1242 if (status == STATUS_SUCCESS)
1243 {
1244 view->flags |= VFLAG_VALLOC;
1245 base = view->base;
1246 }
1247 }
1248 else /* commit the pages */
1249 {
1250 if (!(view = VIRTUAL_FindView( base )) ||
1251 ((char *)base + size > (char *)view->base + view->size)) status = STATUS_NOT_MAPPED_VIEW;
1252 else if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1253 }
1254
1255 RtlLeaveCriticalSection( &csVirtual );
1256
1257 if (status == STATUS_SUCCESS)
1258 {
1259 *ret = base;
1260 *size_ptr = size;
1261 }
1262 return status;
1263 }
1264
1265
1266 /***********************************************************************
1267 * NtFreeVirtualMemory (NTDLL.@)
1268 * ZwFreeVirtualMemory (NTDLL.@)
1269 */
1270 NTSTATUS WINAPI NtFreeVirtualMemory( HANDLE process, PVOID *addr_ptr, ULONG *size_ptr, ULONG type )
1271 {
1272 FILE_VIEW *view;
1273 char *base;
1274 NTSTATUS status = STATUS_SUCCESS;
1275 LPVOID addr = *addr_ptr;
1276 DWORD size = *size_ptr;
1277
1278 TRACE("%p %p %08lx %lx\n", process, addr, size, type );
1279
1280 if (!is_current_process( process ))
1281 {
1282 ERR("Unsupported on other process\n");
1283 return STATUS_ACCESS_DENIED;
1284 }
1285
1286 /* Fix the parameters */
1287
1288 size = ROUND_SIZE( addr, size );
1289 base = ROUND_ADDR( addr, page_mask );
1290
1291 RtlEnterCriticalSection(&csVirtual);
1292
1293 if (!(view = VIRTUAL_FindView( base )) ||
1294 (base + size > (char *)view->base + view->size) ||
1295 !(view->flags & VFLAG_VALLOC))
1296 {
1297 status = STATUS_INVALID_PARAMETER;
1298 }
1299 else if (type & MEM_SYSTEM)
1300 {
1301 /* return the values that the caller should use to unmap the area */
1302 *addr_ptr = view->base;
1303 *size_ptr = view->size;
1304 view->flags |= VFLAG_SYSTEM;
1305 delete_view( view );
1306 }
1307 else if (type == MEM_RELEASE)
1308 {
1309 /* Free the pages */
1310
1311 if (size || (base != view->base)) status = STATUS_INVALID_PARAMETER;
1312 else
1313 {
1314 delete_view( view );
1315 *addr_ptr = base;
1316 *size_ptr = size;
1317 }
1318 }
1319 else if (type == MEM_DECOMMIT)
1320 {
1321 status = decommit_pages( view, base - (char *)view->base, size );
1322 if (status == STATUS_SUCCESS)
1323 {
1324 *addr_ptr = base;
1325 *size_ptr = size;
1326 }
1327 }
1328 else
1329 {
1330 WARN("called with wrong free type flags (%08lx) !\n", type);
1331 status = STATUS_INVALID_PARAMETER;
1332 }
1333
1334 RtlLeaveCriticalSection(&csVirtual);
1335 return status;
1336 }
1337
1338
1339 /***********************************************************************
1340 * NtProtectVirtualMemory (NTDLL.@)
1341 * ZwProtectVirtualMemory (NTDLL.@)
1342 */
1343 NTSTATUS WINAPI NtProtectVirtualMemory( HANDLE process, PVOID *addr_ptr, ULONG *size_ptr,
1344 ULONG new_prot, ULONG *old_prot )
1345 {
1346 FILE_VIEW *view;
1347 NTSTATUS status = STATUS_SUCCESS;
1348 char *base;
1349 UINT i;
1350 BYTE vprot, *p;
1351 DWORD prot, size = *size_ptr;
1352 LPVOID addr = *addr_ptr;
1353
1354 TRACE("%p %p %08lx %08lx\n", process, addr, size, new_prot );
1355
1356 if (!is_current_process( process ))
1357 {
1358 ERR("Unsupported on other process\n");
1359 return STATUS_ACCESS_DENIED;
1360 }
1361
1362 /* Fix the parameters */
1363
1364 size = ROUND_SIZE( addr, size );
1365 base = ROUND_ADDR( addr, page_mask );
1366
1367 RtlEnterCriticalSection( &csVirtual );
1368
1369 if (!(view = VIRTUAL_FindView( base )) || (base + size > (char *)view->base + view->size))
1370 {
1371 status = STATUS_INVALID_PARAMETER;
1372 }
1373 else
1374 {
1375 /* Make sure all the pages are committed */
1376
1377 p = view->prot + ((base - (char *)view->base) >> page_shift);
1378 VIRTUAL_GetWin32Prot( *p, &prot, NULL );
1379 for (i = size >> page_shift; i; i--, p++)
1380 {
1381 if (!(*p & VPROT_COMMITTED))
1382 {
1383 status = STATUS_NOT_COMMITTED;
1384 break;
1385 }
1386 }
1387 if (!i)
1388 {
1389 if (old_prot) *old_prot = prot;
1390 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1391 if (!VIRTUAL_SetProt( view, base, size, vprot )) status = STATUS_ACCESS_DENIED;
1392 }
1393 }
1394 RtlLeaveCriticalSection( &csVirtual );
1395
1396 if (status == STATUS_SUCCESS)
1397 {
1398 *addr_ptr = base;
1399 *size_ptr = size;
1400 }
1401 return status;
1402 }
1403
1404
1405 /***********************************************************************
1406 * NtQueryVirtualMemory (NTDLL.@)
1407 * ZwQueryVirtualMemory (NTDLL.@)
1408 */
1409 NTSTATUS WINAPI NtQueryVirtualMemory( HANDLE process, LPCVOID addr,
1410 MEMORY_INFORMATION_CLASS info_class, PVOID buffer,
1411 ULONG len, ULONG *res_len )
1412 {
1413 FILE_VIEW *view;
1414 char *base, *alloc_base = 0;
1415 struct list *ptr;
1416 UINT size = 0;
1417 MEMORY_BASIC_INFORMATION *info = buffer;
1418
1419 if (info_class != MemoryBasicInformation)
1420 {
1421 FIXME("(%p, %p, %d, %p, %ld, %p) Unimplemented information class\n", process, addr,
1422 info_class, buffer, len, res_len);
1423 return STATUS_INVALID_INFO_CLASS;
1424 }
1425 if (ADDRESS_SPACE_LIMIT && addr >= ADDRESS_SPACE_LIMIT)
1426 return STATUS_WORKING_SET_LIMIT_RANGE;
1427
1428 if (!is_current_process( process ))
1429 {
1430 ERR("Unsupported on other process\n");
1431 return STATUS_ACCESS_DENIED;
1432 }
1433
1434 base = ROUND_ADDR( addr, page_mask );
1435
1436 /* Find the view containing the address */
1437
1438 RtlEnterCriticalSection(&csVirtual);
1439 ptr = list_head( &views_list );
1440 for (;;)
1441 {
1442 if (!ptr)
1443 {
1444 /* make the address space end at the user limit, except if
1445 * the last view was mapped beyond that */
1446 if (alloc_base < (char *)user_space_limit)
1447 {
1448 if (user_space_limit && base >= (char *)user_space_limit)
1449 {
1450 RtlLeaveCriticalSection( &csVirtual );
1451 return STATUS_WORKING_SET_LIMIT_RANGE;
1452 }
1453 size = (char *)user_space_limit - alloc_base;
1454 }
1455 else size = (char *)ADDRESS_SPACE_LIMIT - alloc_base;
1456 view = NULL;
1457 break;
1458 }
1459 view = LIST_ENTRY( ptr, struct file_view, entry );
1460 if ((char *)view->base > base)
1461 {
1462 size = (char *)view->base - alloc_base;
1463 view = NULL;
1464 break;
1465 }
1466 if ((char *)view->base + view->size > base)
1467 {
1468 alloc_base = view->base;
1469 size = view->size;
1470 break;
1471 }
1472 alloc_base = (char *)view->base + view->size;
1473 ptr = list_next( &views_list, ptr );
1474 }
1475
1476 /* Fill the info structure */
1477
1478 if (!view)
1479 {
1480 info->State = MEM_FREE;
1481 info->Protect = 0;
1482 info->AllocationProtect = 0;
1483 info->Type = 0;
1484 }
1485 else
1486 {
1487 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1488 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1489 for (size = base - alloc_base; size < view->size; size += page_mask+1)
1490 if (view->prot[size >> page_shift] != vprot) break;
1491 VIRTUAL_GetWin32Prot( view->protect, &info->AllocationProtect, NULL );
1492 if (view->protect & VPROT_IMAGE) info->Type = MEM_IMAGE;
1493 else if (view->flags & VFLAG_VALLOC) info->Type = MEM_PRIVATE;
1494 else info->Type = MEM_MAPPED;
1495 }
1496 RtlLeaveCriticalSection(&csVirtual);
1497
1498 info->BaseAddress = (LPVOID)base;
1499 info->AllocationBase = (LPVOID)alloc_base;
1500 info->RegionSize = size - (base - alloc_base);
1501 if (res_len) *res_len = sizeof(*info);
1502 return STATUS_SUCCESS;
1503 }
1504
1505
1506 /***********************************************************************
1507 * NtLockVirtualMemory (NTDLL.@)
1508 * ZwLockVirtualMemory (NTDLL.@)
1509 */
1510 NTSTATUS WINAPI NtLockVirtualMemory( HANDLE process, PVOID *addr, ULONG *size, ULONG unknown )
1511 {
1512 if (!is_current_process( process ))
1513 {
1514 ERR("Unsupported on other process\n");
1515 return STATUS_ACCESS_DENIED;
1516 }
1517 return STATUS_SUCCESS;
1518 }
1519
1520
1521 /***********************************************************************
1522 * NtUnlockVirtualMemory (NTDLL.@)
1523 * ZwUnlockVirtualMemory (NTDLL.@)
1524 */
1525 NTSTATUS WINAPI NtUnlockVirtualMemory( HANDLE process, PVOID *addr, ULONG *size, ULONG unknown )
1526 {
1527 if (!is_current_process( process ))
1528 {
1529 ERR("Unsupported on other process\n");
1530 return STATUS_ACCESS_DENIED;
1531 }
1532 return STATUS_SUCCESS;
1533 }
1534
1535
1536 /***********************************************************************
1537 * NtCreateSection (NTDLL.@)
1538 * ZwCreateSection (NTDLL.@)
1539 */
1540 NTSTATUS WINAPI NtCreateSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr,
1541 const LARGE_INTEGER *size, ULONG protect,
1542 ULONG sec_flags, HANDLE file )
1543 {
1544 NTSTATUS ret;
1545 BYTE vprot;
1546 DWORD len = (attr && attr->ObjectName) ? attr->ObjectName->Length : 0;
1547
1548 /* Check parameters */
1549
1550 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1551
1552 vprot = VIRTUAL_GetProt( protect );
1553 if (sec_flags & SEC_RESERVE)
1554 {
1555 if (file) return STATUS_INVALID_PARAMETER;
1556 }
1557 else vprot |= VPROT_COMMITTED;
1558 if (sec_flags & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1559 if (sec_flags & SEC_IMAGE) vprot |= VPROT_IMAGE;
1560
1561 /* Create the server object */
1562
1563 SERVER_START_REQ( create_mapping )
1564 {
1565 req->file_handle = file;
1566 req->size_high = size ? size->u.HighPart : 0;
1567 req->size_low = size ? size->u.LowPart : 0;
1568 req->protect = vprot;
1569 req->access = access;
1570 req->inherit = (attr && (attr->Attributes & OBJ_INHERIT) != 0);
1571 if (len) wine_server_add_data( req, attr->ObjectName->Buffer, len );
1572 ret = wine_server_call( req );
1573 *handle = reply->handle;
1574 }
1575 SERVER_END_REQ;
1576 return ret;
1577 }
1578
1579
1580 /***********************************************************************
1581 * NtOpenSection (NTDLL.@)
1582 * ZwOpenSection (NTDLL.@)
1583 */
1584 NTSTATUS WINAPI NtOpenSection( HANDLE *handle, ACCESS_MASK access, const OBJECT_ATTRIBUTES *attr )
1585 {
1586 NTSTATUS ret;
1587 DWORD len = attr->ObjectName->Length;
1588
1589 if (len > MAX_PATH*sizeof(WCHAR)) return STATUS_NAME_TOO_LONG;
1590
1591 SERVER_START_REQ( open_mapping )
1592 {
1593 req->access = access;
1594 req->inherit = (attr->Attributes & OBJ_INHERIT) != 0;
1595 wine_server_add_data( req, attr->ObjectName->Buffer, len );
1596 if (!(ret = wine_server_call( req ))) *handle = reply->handle;
1597 }
1598 SERVER_END_REQ;
1599 return ret;
1600 }
1601
1602
1603 /***********************************************************************
1604 * NtMapViewOfSection (NTDLL.@)
1605 * ZwMapViewOfSection (NTDLL.@)
1606 */
1607 NTSTATUS WINAPI NtMapViewOfSection( HANDLE handle, HANDLE process, PVOID *addr_ptr, ULONG zero_bits,
1608 ULONG commit_size, const LARGE_INTEGER *offset_ptr, ULONG *size_ptr,
1609 SECTION_INHERIT inherit, ULONG alloc_type, ULONG protect )
1610 {
1611 IO_STATUS_BLOCK io;
1612 FILE_FS_DEVICE_INFORMATION device_info;
1613 NTSTATUS res;
1614 UINT size = 0;
1615 int unix_handle = -1;
1616 int prot;
1617 void *base;
1618 struct file_view *view;
1619 DWORD size_low, size_high, header_size, shared_size;
1620 HANDLE shared_file;
1621 BOOL removable = FALSE;
1622 LARGE_INTEGER offset;
1623
1624 offset.QuadPart = offset_ptr ? offset_ptr->QuadPart : 0;
1625
1626 TRACE("handle=%p process=%p addr=%p off=%lx%08lx size=%x access=%lx\n",
1627 handle, process, *addr_ptr, offset.u.HighPart, offset.u.LowPart, size, protect );
1628
1629 if (!is_current_process( process ))
1630 {
1631 ERR("Unsupported on other process\n");
1632 return STATUS_ACCESS_DENIED;
1633 }
1634
1635 /* Check parameters */
1636
1637 if ((offset.u.LowPart & granularity_mask) ||
1638 (*addr_ptr && ((UINT_PTR)*addr_ptr & granularity_mask)))
1639 return STATUS_INVALID_PARAMETER;
1640
1641 SERVER_START_REQ( get_mapping_info )
1642 {
1643 req->handle = handle;
1644 res = wine_server_call( req );
1645 prot = reply->protect;
1646 base = reply->base;
1647 size_low = reply->size_low;
1648 size_high = reply->size_high;
1649 header_size = reply->header_size;
1650 shared_file = reply->shared_file;
1651 shared_size = reply->shared_size;
1652 }
1653 SERVER_END_REQ;
1654 if (res) return res;
1655
1656 if ((res = wine_server_handle_to_fd( handle, 0, &unix_handle, NULL ))) return res;
1657
1658 if (NtQueryVolumeInformationFile( handle, &io, &device_info, sizeof(device_info),
1659 FileFsDeviceInformation ) == STATUS_SUCCESS)
1660 removable = device_info.Characteristics & FILE_REMOVABLE_MEDIA;
1661
1662 if (prot & VPROT_IMAGE)
1663 {
1664 if (shared_file)
1665 {
1666 int shared_fd;
1667
1668 if ((res = wine_server_handle_to_fd( shared_file, GENERIC_READ, &shared_fd,
1669 NULL ))) goto done;
1670 res = map_image( handle, unix_handle, base, size_low, header_size,
1671 shared_fd, removable, addr_ptr );
1672 wine_server_release_fd( shared_file, shared_fd );
1673 NtClose( shared_file );
1674 }
1675 else
1676 {
1677 res = map_image( handle, unix_handle, base, size_low, header_size,
1678 -1, removable, addr_ptr );
1679 }
1680 wine_server_release_fd( handle, unix_handle );
1681 if (!res) *size_ptr = size_low;
1682 return res;
1683 }
1684
1685 if (size_high)
1686 ERR("Sizes larger than 4Gb not supported\n");
1687
1688 if ((offset.u.LowPart >= size_low) ||
1689 (*size_ptr > size_low - offset.u.LowPart))
1690 {
1691 res = STATUS_INVALID_PARAMETER;
1692 goto done;
1693 }
1694 if (*size_ptr) size = ROUND_SIZE( offset.u.LowPart, *size_ptr );
1695 else size = size_low - offset.u.LowPart;
1696
1697 switch(protect)
1698 {
1699 case PAGE_NOACCESS:
1700 break;
1701 case PAGE_READWRITE:
1702 case PAGE_EXECUTE_READWRITE:
1703 if (!(prot & VPROT_WRITE))
1704 {
1705 res = STATUS_INVALID_PARAMETER;
1706 goto done;
1707 }
1708 removable = FALSE;
1709 /* fall through */
1710 case PAGE_READONLY:
1711 case PAGE_WRITECOPY:
1712 case PAGE_EXECUTE:
1713 case PAGE_EXECUTE_READ:
1714 case PAGE_EXECUTE_WRITECOPY:
1715 if (prot & VPROT_READ) break;
1716 /* fall through */
1717 default:
1718 res = STATUS_INVALID_PARAMETER;
1719 goto done;
1720 }
1721
1722 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1723 * which has a view of this mapping commits some pages, they will
1724 * appear commited in all other processes, which have the same
1725 * view created. Since we don`t support this yet, we create the
1726 * whole mapping commited.
1727 */
1728 prot |= VPROT_COMMITTED;
1729
1730 /* Reserve a properly aligned area */
1731
1732 RtlEnterCriticalSection( &csVirtual );
1733
1734 res = map_view( &view, *addr_ptr, size, prot );
1735 if (res)
1736 {
1737 RtlLeaveCriticalSection( &csVirtual );
1738 goto done;
1739 }
1740
1741 /* Map the file */
1742
1743 TRACE("handle=%p size=%x offset=%lx%08lx\n",
1744 handle, size, offset.u.HighPart, offset.u.LowPart );
1745
1746 res = map_file_into_view( view, unix_handle, 0, size, offset.QuadPart, prot, removable );
1747 if (res == STATUS_SUCCESS)
1748 {
1749 if (!removable) /* don't keep handle open on removable media */
1750 NtDuplicateObject( NtCurrentProcess(), handle,
1751 NtCurrentProcess(), &view->mapping,
1752 0, 0, DUPLICATE_SAME_ACCESS );
1753
1754 *addr_ptr = view->base;
1755 *size_ptr = size;
1756 }
1757 else
1758 {
1759 ERR( "map_file_into_view %p %x %lx%08lx failed\n",
1760 view->base, size, offset.u.HighPart, offset.u.LowPart );
1761 delete_view( view );
1762 }
1763
1764 RtlLeaveCriticalSection( &csVirtual );
1765
1766 done:
1767 wine_server_release_fd( handle, unix_handle );
1768 return res;
1769 }
1770
1771
1772 /***********************************************************************
1773 * NtUnmapViewOfSection (NTDLL.@)
1774 * ZwUnmapViewOfSection (NTDLL.@)
1775 */
1776 NTSTATUS WINAPI NtUnmapViewOfSection( HANDLE process, PVOID addr )
1777 {
1778 FILE_VIEW *view;
1779 NTSTATUS status = STATUS_INVALID_PARAMETER;
1780 void *base = ROUND_ADDR( addr, page_mask );
1781
1782 if (!is_current_process( process ))
1783 {
1784 ERR("Unsupported on other process\n");
1785 return STATUS_ACCESS_DENIED;
1786 }
1787 RtlEnterCriticalSection( &csVirtual );
1788 if ((view = VIRTUAL_FindView( base )) && (base == view->base))
1789 {
1790 delete_view( view );
1791 status = STATUS_SUCCESS;
1792 }
1793 RtlLeaveCriticalSection( &csVirtual );
1794 return status;
1795 }
1796
1797
1798 /***********************************************************************
1799 * NtFlushVirtualMemory (NTDLL.@)
1800 * ZwFlushVirtualMemory (NTDLL.@)
1801 */
1802 NTSTATUS WINAPI NtFlushVirtualMemory( HANDLE process, LPCVOID *addr_ptr,
1803 ULONG *size_ptr, ULONG unknown )
1804 {
1805 FILE_VIEW *view;
1806 NTSTATUS status = STATUS_SUCCESS;
1807 void *addr = ROUND_ADDR( *addr_ptr, page_mask );
1808
1809 if (!is_current_process( process ))
1810 {
1811 ERR("Unsupported on other process\n");
1812 return STATUS_ACCESS_DENIED;
1813 }
1814 RtlEnterCriticalSection( &csVirtual );
1815 if (!(view = VIRTUAL_FindView( addr ))) status = STATUS_INVALID_PARAMETER;
1816 else
1817 {
1818 if (!*size_ptr) *size_ptr = view->size;
1819 *addr_ptr = addr;
1820 if (msync( addr, *size_ptr, MS_SYNC )) status = STATUS_NOT_MAPPED_DATA;
1821 }
1822 RtlLeaveCriticalSection( &csVirtual );
1823 return status;
1824 }
1825
1826
1827 /***********************************************************************
1828 * NtReadVirtualMemory (NTDLL.@)
1829 * ZwReadVirtualMemory (NTDLL.@)
1830 */
1831 NTSTATUS WINAPI NtReadVirtualMemory( HANDLE process, const void *addr, void *buffer,
1832 SIZE_T size, SIZE_T *bytes_read )
1833 {
1834 NTSTATUS status;
1835
1836 SERVER_START_REQ( read_process_memory )
1837 {
1838 req->handle = process;
1839 req->addr = (void *)addr;
1840 wine_server_set_reply( req, buffer, size );
1841 if ((status = wine_server_call( req ))) size = 0;
1842 }
1843 SERVER_END_REQ;
1844 if (bytes_read) *bytes_read = size;
1845 return status;
1846 }
1847
1848
1849 /***********************************************************************
1850 * NtWriteVirtualMemory (NTDLL.@)
1851 * ZwWriteVirtualMemory (NTDLL.@)
1852 */
1853 NTSTATUS WINAPI NtWriteVirtualMemory( HANDLE process, void *addr, const void *buffer,
1854 SIZE_T size, SIZE_T *bytes_written )
1855 {
1856 static const unsigned int zero;
1857 unsigned int first_offset, last_offset, first_mask, last_mask;
1858 NTSTATUS status;
1859
1860 if (!size) return STATUS_INVALID_PARAMETER;
1861
1862 /* compute the mask for the first int */
1863 first_mask = ~0;
1864 first_offset = (unsigned int)addr % sizeof(int);
1865 memset( &first_mask, 0, first_offset );
1866
1867 /* compute the mask for the last int */
1868 last_offset = (size + first_offset) % sizeof(int);
1869 last_mask = 0;
1870 memset( &last_mask, 0xff, last_offset ? last_offset : sizeof(int) );
1871
1872 SERVER_START_REQ( write_process_memory )
1873 {
1874 req->handle = process;
1875 req->addr = (char *)addr - first_offset;
1876 req->first_mask = first_mask;
1877 req->last_mask = last_mask;
1878 if (first_offset) wine_server_add_data( req, &zero, first_offset );
1879 wine_server_add_data( req, buffer, size );
1880 if (last_offset) wine_server_add_data( req, &zero, sizeof(int) - last_offset );
1881
1882 if ((status = wine_server_call( req ))) size = 0;
1883 }
1884 SERVER_END_REQ;
1885 if (bytes_written) *bytes_written = size;
1886 return status;
1887 }
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