2 * Win32 virtual memory functions
4 * Copyright 1997 Alexandre Julliard
11 #ifdef HAVE_SYS_ERRNO_H
12 #include <sys/errno.h>
19 #include <sys/types.h>
20 #ifdef HAVE_SYS_MMAN_H
25 #include "wine/exception.h"
26 #include "wine/unicode.h"
27 #include "wine/library.h"
28 #include "wine/port.h"
33 #include "debugtools.h"
35 DEFAULT_DEBUG_CHANNEL(virtual);
36 DECLARE_DEBUG_CHANNEL(module);
45 struct _FV *next; /* Next view */
46 struct _FV *prev; /* Prev view */
47 UINT base; /* Base address */
48 UINT size; /* Size in bytes */
49 UINT flags; /* Allocation flags */
50 HANDLE mapping; /* Handle to the file mapping */
51 HANDLERPROC handlerProc; /* Fault handler */
52 LPVOID handlerArg; /* Fault handler argument */
53 BYTE protect; /* Protection for all pages at allocation time */
54 BYTE prot[1]; /* Protection byte for each page */
58 #define VFLAG_SYSTEM 0x01
59 #define VFLAG_VALLOC 0x02 /* allocated by VirtualAlloc */
61 /* Conversion from VPROT_* to Win32 flags */
62 static const BYTE VIRTUAL_Win32Flags[16] =
64 PAGE_NOACCESS, /* 0 */
65 PAGE_READONLY, /* READ */
66 PAGE_READWRITE, /* WRITE */
67 PAGE_READWRITE, /* READ | WRITE */
68 PAGE_EXECUTE, /* EXEC */
69 PAGE_EXECUTE_READ, /* READ | EXEC */
70 PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */
71 PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */
72 PAGE_WRITECOPY, /* WRITECOPY */
73 PAGE_WRITECOPY, /* READ | WRITECOPY */
74 PAGE_WRITECOPY, /* WRITE | WRITECOPY */
75 PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */
76 PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */
77 PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */
78 PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */
79 PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */
83 static FILE_VIEW *VIRTUAL_FirstView;
84 static CRITICAL_SECTION csVirtual = CRITICAL_SECTION_INIT;
87 /* These are always the same on an i386, and it will be faster this way */
88 # define page_mask 0xfff
89 # define page_shift 12
90 # define page_size 0x1000
92 static UINT page_shift;
93 static UINT page_mask;
94 static UINT page_size;
96 #define granularity_mask 0xffff /* Allocation granularity (usually 64k) */
98 #define ROUND_ADDR(addr) \
99 ((UINT)(addr) & ~page_mask)
101 #define ROUND_SIZE(addr,size) \
102 (((UINT)(size) + ((UINT)(addr) & page_mask) + page_mask) & ~page_mask)
104 #define VIRTUAL_DEBUG_DUMP_VIEW(view) \
105 if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view)
107 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size, DWORD offset, int prot, int flags );
109 /* filter for page-fault exceptions */
110 static WINE_EXCEPTION_FILTER(page_fault)
112 if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
113 return EXCEPTION_EXECUTE_HANDLER;
114 return EXCEPTION_CONTINUE_SEARCH;
117 /***********************************************************************
120 static const char *VIRTUAL_GetProtStr( BYTE prot )
122 static char buffer[6];
123 buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-';
124 buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-';
125 buffer[2] = (prot & VPROT_READ) ? 'r' : '-';
126 buffer[3] = (prot & VPROT_WRITE) ?
127 ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-';
128 buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-';
134 /***********************************************************************
137 static void VIRTUAL_DumpView( FILE_VIEW *view )
140 UINT addr = view->base;
141 BYTE prot = view->prot[0];
143 DPRINTF( "View: %08x - %08x",
144 view->base, view->base + view->size - 1 );
145 if (view->flags & VFLAG_SYSTEM)
146 DPRINTF( " (system)\n" );
147 else if (view->flags & VFLAG_VALLOC)
148 DPRINTF( " (valloc)\n" );
149 else if (view->mapping)
150 DPRINTF( " %d\n", view->mapping );
152 DPRINTF( " (anonymous)\n");
154 for (count = i = 1; i < view->size >> page_shift; i++, count++)
156 if (view->prot[i] == prot) continue;
157 DPRINTF( " %08x - %08x %s\n",
158 addr, addr + (count << page_shift) - 1,
159 VIRTUAL_GetProtStr(prot) );
160 addr += (count << page_shift);
161 prot = view->prot[i];
165 DPRINTF( " %08x - %08x %s\n",
166 addr, addr + (count << page_shift) - 1,
167 VIRTUAL_GetProtStr(prot) );
171 /***********************************************************************
174 void VIRTUAL_Dump(void)
177 DPRINTF( "\nDump of all virtual memory views:\n\n" );
178 EnterCriticalSection(&csVirtual);
179 view = VIRTUAL_FirstView;
182 VIRTUAL_DumpView( view );
185 LeaveCriticalSection(&csVirtual);
189 /***********************************************************************
192 * Find the view containing a given address.
198 static FILE_VIEW *VIRTUAL_FindView(
199 UINT addr /* [in] Address */
203 EnterCriticalSection(&csVirtual);
204 view = VIRTUAL_FirstView;
207 if (view->base > addr)
212 if (view->base + view->size > addr) break;
215 LeaveCriticalSection(&csVirtual);
220 /***********************************************************************
223 * Create a new view and add it in the linked list.
225 static FILE_VIEW *VIRTUAL_CreateView( UINT base, UINT size, UINT flags,
226 BYTE vprot, HANDLE mapping )
228 FILE_VIEW *view, *prev;
230 /* Create the view structure */
232 assert( !(base & page_mask) );
233 assert( !(size & page_mask) );
235 if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL;
237 view->size = size << page_shift;
239 view->mapping = mapping;
240 view->protect = vprot;
241 view->handlerProc = NULL;
242 memset( view->prot, vprot, size );
244 /* Duplicate the mapping handle */
247 !DuplicateHandle( GetCurrentProcess(), view->mapping,
248 GetCurrentProcess(), &view->mapping,
249 0, FALSE, DUPLICATE_SAME_ACCESS ))
255 /* Insert it in the linked list */
257 EnterCriticalSection(&csVirtual);
258 if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
260 view->next = VIRTUAL_FirstView;
262 if (view->next) view->next->prev = view;
263 VIRTUAL_FirstView = view;
267 prev = VIRTUAL_FirstView;
268 while (prev->next && (prev->next->base < base)) prev = prev->next;
269 view->next = prev->next;
271 if (view->next) view->next->prev = view;
274 LeaveCriticalSection(&csVirtual);
275 VIRTUAL_DEBUG_DUMP_VIEW( view );
280 /***********************************************************************
287 static void VIRTUAL_DeleteView(
288 FILE_VIEW *view /* [in] View */
290 if (!(view->flags & VFLAG_SYSTEM))
291 munmap( (void *)view->base, view->size );
292 EnterCriticalSection(&csVirtual);
293 if (view->next) view->next->prev = view->prev;
294 if (view->prev) view->prev->next = view->next;
295 else VIRTUAL_FirstView = view->next;
296 LeaveCriticalSection(&csVirtual);
297 if (view->mapping) NtClose( view->mapping );
302 /***********************************************************************
303 * VIRTUAL_GetUnixProt
305 * Convert page protections to protection for mmap/mprotect.
307 static int VIRTUAL_GetUnixProt( BYTE vprot )
310 if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD))
312 if (vprot & VPROT_READ) prot |= PROT_READ;
313 if (vprot & VPROT_WRITE) prot |= PROT_WRITE;
314 if (vprot & VPROT_WRITECOPY) prot |= PROT_WRITE;
315 if (vprot & VPROT_EXEC) prot |= PROT_EXEC;
321 /***********************************************************************
322 * VIRTUAL_GetWin32Prot
324 * Convert page protections to Win32 flags.
329 static void VIRTUAL_GetWin32Prot(
330 BYTE vprot, /* [in] Page protection flags */
331 DWORD *protect, /* [out] Location to store Win32 protection flags */
332 DWORD *state /* [out] Location to store mem state flag */
335 *protect = VIRTUAL_Win32Flags[vprot & 0x0f];
336 /* if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/
337 if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE;
339 if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS;
342 if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE;
346 /***********************************************************************
349 * Build page protections from Win32 flags.
352 * Value of page protection flags
354 static BYTE VIRTUAL_GetProt(
355 DWORD protect /* [in] Win32 protection flags */
359 switch(protect & 0xff)
365 vprot = VPROT_READ | VPROT_WRITE;
368 /* MSDN CreateFileMapping() states that if PAGE_WRITECOPY is given,
369 * that the hFile must have been opened with GENERIC_READ and
370 * GENERIC_WRITE access. This is WRONG as tests show that you
371 * only need GENERIC_READ access (at least for Win9x,
372 * FIXME: what about NT?). Thus, we don't put VPROT_WRITE in
373 * PAGE_WRITECOPY and PAGE_EXECUTE_WRITECOPY.
375 vprot = VPROT_READ | VPROT_WRITECOPY;
380 case PAGE_EXECUTE_READ:
381 vprot = VPROT_EXEC | VPROT_READ;
383 case PAGE_EXECUTE_READWRITE:
384 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
386 case PAGE_EXECUTE_WRITECOPY:
387 /* See comment for PAGE_WRITECOPY above */
388 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITECOPY;
395 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
396 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
401 /***********************************************************************
404 * Change the protection of a range of pages.
410 static BOOL VIRTUAL_SetProt(
411 FILE_VIEW *view, /* [in] Pointer to view */
412 UINT base, /* [in] Starting address */
413 UINT size, /* [in] Size in bytes */
414 BYTE vprot /* [in] Protections to use */
416 TRACE("%08x-%08x %s\n",
417 base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
419 if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
420 return FALSE; /* FIXME: last error */
422 memset( view->prot + ((base - view->base) >> page_shift),
423 vprot, size >> page_shift );
424 VIRTUAL_DEBUG_DUMP_VIEW( view );
429 /***********************************************************************
432 * Map an executable (PE format) image into memory.
434 static LPVOID map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
435 DWORD header_size, HANDLE shared_file, DWORD shared_size )
437 IMAGE_DOS_HEADER *dos;
438 IMAGE_NT_HEADERS *nt;
439 IMAGE_SECTION_HEADER *sec;
441 DWORD err = GetLastError();
442 FILE_VIEW *view = NULL;
446 SetLastError( ERROR_BAD_EXE_FORMAT ); /* generic error */
448 /* zero-map the whole range */
450 if ((ptr = wine_anon_mmap( base, total_size,
451 PROT_READ | PROT_WRITE | PROT_EXEC, 0 )) == (char *)-1)
453 ptr = wine_anon_mmap( NULL, total_size,
454 PROT_READ | PROT_WRITE | PROT_EXEC, 0 );
455 if (ptr == (char *)-1)
457 ERR_(module)("Not enough memory for module (%ld bytes)\n", total_size);
461 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
463 if (!(view = VIRTUAL_CreateView( (UINT)ptr, total_size, 0,
464 VPROT_COMMITTED|VPROT_READ|VPROT_WRITE|VPROT_WRITECOPY,
467 munmap( ptr, total_size );
468 SetLastError( ERROR_OUTOFMEMORY );
474 if (VIRTUAL_mmap( fd, ptr, header_size, 0, PROT_READ | PROT_WRITE,
475 MAP_PRIVATE | MAP_FIXED ) == (char *)-1) goto error;
476 dos = (IMAGE_DOS_HEADER *)ptr;
477 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
478 if ((char *)(nt + 1) > ptr + header_size) goto error;
480 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
481 if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
483 /* check the architecture */
485 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
487 MESSAGE("Trying to load PE image for unsupported architecture (");
488 switch (nt->FileHeader.Machine)
490 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
491 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
492 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
493 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
494 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
495 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
496 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
497 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
503 /* retrieve the shared sections file */
507 if ((shared_fd = FILE_GetUnixHandle( shared_file, GENERIC_READ )) == -1) goto error;
508 CloseHandle( shared_file ); /* we no longer need it */
512 /* map all the sections */
514 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
518 /* a few sanity checks */
519 size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
520 if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
522 ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
523 sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
527 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
528 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
530 size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
531 TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
532 sec->Name, (char *)ptr + sec->VirtualAddress,
533 sec->PointerToRawData, pos, sec->SizeOfRawData,
534 size, sec->Characteristics );
535 if (VIRTUAL_mmap( shared_fd, (char *)ptr + sec->VirtualAddress, size,
536 pos, PROT_READ|PROT_WRITE|PROT_EXEC,
537 MAP_SHARED|MAP_FIXED ) == (void *)-1)
539 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
546 if (sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) continue;
547 if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
549 TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
550 sec->Name, (char *)ptr + sec->VirtualAddress,
551 sec->PointerToRawData, sec->SizeOfRawData,
552 sec->Characteristics );
554 /* Note: if the section is not aligned properly VIRTUAL_mmap will magically
555 * fall back to read(), so we don't need to check anything here.
557 if (VIRTUAL_mmap( fd, (char *)ptr + sec->VirtualAddress, sec->SizeOfRawData,
558 sec->PointerToRawData, PROT_READ|PROT_WRITE|PROT_EXEC,
559 MAP_PRIVATE | MAP_FIXED ) == (void *)-1)
561 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
565 if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
567 DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
568 if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
569 TRACE_(module)("clearing %p - %p\n",
570 (char *)ptr + sec->VirtualAddress + sec->SizeOfRawData,
571 (char *)ptr + sec->VirtualAddress + end );
572 memset( (char *)ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
573 end - sec->SizeOfRawData );
577 SetLastError( err ); /* restore last error */
579 if (shared_fd != -1) close( shared_fd );
583 if (view) VIRTUAL_DeleteView( view );
585 if (shared_fd != -1) close( shared_fd );
586 if (shared_file) CloseHandle( shared_file );
591 /***********************************************************************
595 DECL_GLOBAL_CONSTRUCTOR(VIRTUAL_Init)
597 page_size = getpagesize();
598 page_mask = page_size - 1;
599 /* Make sure we have a power of 2 */
600 assert( !(page_size & page_mask) );
602 while ((1 << page_shift) != page_size) page_shift++;
604 #endif /* page_mask */
607 /***********************************************************************
608 * VIRTUAL_SetFaultHandler
610 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
614 if (!(view = VIRTUAL_FindView((UINT)addr))) return FALSE;
615 view->handlerProc = proc;
616 view->handlerArg = arg;
620 /***********************************************************************
621 * VIRTUAL_HandleFault
623 DWORD VIRTUAL_HandleFault( LPCVOID addr )
625 FILE_VIEW *view = VIRTUAL_FindView((UINT)addr);
626 DWORD ret = EXCEPTION_ACCESS_VIOLATION;
630 if (view->handlerProc)
632 if (view->handlerProc(view->handlerArg, addr)) ret = 0; /* handled */
636 BYTE vprot = view->prot[((UINT)addr - view->base) >> page_shift];
637 UINT page = (UINT)addr & ~page_mask;
638 char *stack = (char *)NtCurrentTeb()->stack_base + SIGNAL_STACK_SIZE + page_mask + 1;
639 if (vprot & VPROT_GUARD)
641 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
642 ret = STATUS_GUARD_PAGE_VIOLATION;
644 /* is it inside the stack guard pages? */
645 if (((char *)addr >= stack) && ((char *)addr < stack + 2*(page_mask+1)))
646 ret = STATUS_STACK_OVERFLOW;
653 /***********************************************************************
656 * Wrapper for mmap() that handles anonymous mappings portably,
657 * and falls back to read if mmap of a file fails.
659 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size,
660 DWORD offset, int prot, int flags )
665 if (fd == -1) return wine_anon_mmap( start, size, prot, flags );
667 if ((ret = mmap( start, size, prot, flags, fd, offset )) != (LPVOID)-1)
670 /* mmap() failed; if this is because the file offset is not */
671 /* page-aligned (EINVAL), or because the underlying filesystem */
672 /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
674 if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return ret;
675 if (prot & PROT_WRITE)
677 /* We cannot fake shared write mappings */
679 if (flags & MAP_SHARED) return ret;
682 if (!(flags & MAP_PRIVATE)) return ret;
686 /* Reserve the memory with an anonymous mmap */
687 ret = wine_anon_mmap( start, size, PROT_READ | PROT_WRITE, flags );
688 if (ret == (LPVOID)-1) return ret;
689 /* Now read in the file */
690 if ((pos = lseek( fd, offset, SEEK_SET )) == -1)
695 read( fd, ret, size );
696 lseek( fd, pos, SEEK_SET ); /* Restore the file pointer */
697 mprotect( ret, size, prot ); /* Set the right protection */
702 /***********************************************************************
703 * VirtualAlloc (KERNEL32.548)
704 * Reserves or commits a region of pages in virtual address space
707 * Base address of allocated region of pages
710 LPVOID WINAPI VirtualAlloc(
711 LPVOID addr, /* [in] Address of region to reserve or commit */
712 DWORD size, /* [in] Size of region */
713 DWORD type, /* [in] Type of allocation */
714 DWORD protect /* [in] Type of access protection */
717 UINT base, ptr, view_size;
720 TRACE("%08x %08lx %lx %08lx\n",
721 (UINT)addr, size, type, protect );
723 /* Round parameters to a page boundary */
725 if (size > 0x7fc00000) /* 2Gb - 4Mb */
727 SetLastError( ERROR_OUTOFMEMORY );
732 if (type & MEM_RESERVE) /* Round down to 64k boundary */
733 base = (UINT)addr & ~granularity_mask;
735 base = ROUND_ADDR( addr );
736 size = (((UINT)addr + size + page_mask) & ~page_mask) - base;
737 if ((base <= granularity_mask) || (base + size < base))
739 /* disallow low 64k and wrap-around */
740 SetLastError( ERROR_INVALID_PARAMETER );
747 size = (size + page_mask) & ~page_mask;
750 if (type & MEM_TOP_DOWN) {
751 /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
752 * Is there _ANY_ way to do it with UNIX mmap()?
754 WARN("MEM_TOP_DOWN ignored\n");
755 type &= ~MEM_TOP_DOWN;
757 /* Compute the alloc type flags */
759 if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)) ||
760 (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)))
762 ERR("called with wrong alloc type flags (%08lx) !\n", type);
763 SetLastError( ERROR_INVALID_PARAMETER );
766 if (type & (MEM_COMMIT | MEM_SYSTEM))
767 vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
770 /* Reserve the memory */
772 if ((type & MEM_RESERVE) || !base)
774 if (type & MEM_SYSTEM)
776 if (!(view = VIRTUAL_CreateView( base, size, VFLAG_VALLOC | VFLAG_SYSTEM, vprot, 0 )))
778 SetLastError( ERROR_OUTOFMEMORY );
783 view_size = size + (base ? 0 : granularity_mask + 1);
784 ptr = (UINT)wine_anon_mmap( (LPVOID)base, view_size, VIRTUAL_GetUnixProt( vprot ), 0 );
787 SetLastError( ERROR_OUTOFMEMORY );
792 /* Release the extra memory while keeping the range */
793 /* starting on a 64k boundary. */
795 if (ptr & granularity_mask)
797 UINT extra = granularity_mask + 1 - (ptr & granularity_mask);
798 munmap( (void *)ptr, extra );
802 if (view_size > size)
803 munmap( (void *)(ptr + size), view_size - size );
805 else if (ptr != base)
807 /* We couldn't get the address we wanted */
808 munmap( (void *)ptr, view_size );
809 SetLastError( ERROR_INVALID_ADDRESS );
812 if (!(view = VIRTUAL_CreateView( ptr, size, VFLAG_VALLOC, vprot, 0 )))
814 munmap( (void *)ptr, size );
815 SetLastError( ERROR_OUTOFMEMORY );
821 /* Commit the pages */
823 if (!(view = VIRTUAL_FindView( base )) ||
824 (base + size > view->base + view->size))
826 SetLastError( ERROR_INVALID_ADDRESS );
830 if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
835 /***********************************************************************
836 * VirtualAllocEx (KERNEL32.548)
838 * Seems to be just as VirtualAlloc, but with process handle.
840 LPVOID WINAPI VirtualAllocEx(
841 HANDLE hProcess, /* [in] Handle of process to do mem operation */
842 LPVOID addr, /* [in] Address of region to reserve or commit */
843 DWORD size, /* [in] Size of region */
844 DWORD type, /* [in] Type of allocation */
845 DWORD protect /* [in] Type of access protection */
847 if (MapProcessHandle( hProcess ) == GetCurrentProcessId())
848 return VirtualAlloc( addr, size, type, protect );
849 ERR("Unsupported on other process\n");
854 /***********************************************************************
855 * VirtualFree (KERNEL32.550)
856 * Release or decommits a region of pages in virtual address space.
862 BOOL WINAPI VirtualFree(
863 LPVOID addr, /* [in] Address of region of committed pages */
864 DWORD size, /* [in] Size of region */
865 DWORD type /* [in] Type of operation */
870 TRACE("%08x %08lx %lx\n",
871 (UINT)addr, size, type );
873 /* Fix the parameters */
875 size = ROUND_SIZE( addr, size );
876 base = ROUND_ADDR( addr );
878 if (!(view = VIRTUAL_FindView( base )) ||
879 (base + size > view->base + view->size) ||
880 !(view->flags & VFLAG_VALLOC))
882 SetLastError( ERROR_INVALID_PARAMETER );
886 /* Compute the protection flags */
888 if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
890 ERR("called with wrong free type flags (%08lx) !\n", type);
891 SetLastError( ERROR_INVALID_PARAMETER );
897 if (type == MEM_RELEASE)
899 if (size || (base != view->base))
901 SetLastError( ERROR_INVALID_PARAMETER );
904 VIRTUAL_DeleteView( view );
908 /* Decommit the pages by remapping zero-pages instead */
910 if (wine_anon_mmap( (LPVOID)base, size, VIRTUAL_GetUnixProt(0), MAP_FIXED ) != (LPVOID)base)
911 ERR( "Could not remap pages, expect trouble\n" );
912 return VIRTUAL_SetProt( view, base, size, 0 );
916 /***********************************************************************
917 * VirtualLock (KERNEL32.551)
918 * Locks the specified region of virtual address space
921 * Always returns TRUE
927 BOOL WINAPI VirtualLock(
928 LPVOID addr, /* [in] Address of first byte of range to lock */
929 DWORD size /* [in] Number of bytes in range to lock */
935 /***********************************************************************
936 * VirtualUnlock (KERNEL32.556)
937 * Unlocks a range of pages in the virtual address space
940 * Always returns TRUE
946 BOOL WINAPI VirtualUnlock(
947 LPVOID addr, /* [in] Address of first byte of range */
948 DWORD size /* [in] Number of bytes in range */
954 /***********************************************************************
955 * VirtualProtect (KERNEL32.552)
956 * Changes the access protection on a region of committed pages
962 BOOL WINAPI VirtualProtect(
963 LPVOID addr, /* [in] Address of region of committed pages */
964 DWORD size, /* [in] Size of region */
965 DWORD new_prot, /* [in] Desired access protection */
966 LPDWORD old_prot /* [out] Address of variable to get old protection */
972 TRACE("%08x %08lx %08lx\n",
973 (UINT)addr, size, new_prot );
975 /* Fix the parameters */
977 size = ROUND_SIZE( addr, size );
978 base = ROUND_ADDR( addr );
980 if (!(view = VIRTUAL_FindView( base )) ||
981 (base + size > view->base + view->size))
983 SetLastError( ERROR_INVALID_PARAMETER );
987 /* Make sure all the pages are committed */
989 p = view->prot + ((base - view->base) >> page_shift);
990 for (i = size >> page_shift; i; i--, p++)
992 if (!(*p & VPROT_COMMITTED))
994 SetLastError( ERROR_INVALID_PARAMETER );
999 if (old_prot) VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL );
1000 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
1001 return VIRTUAL_SetProt( view, base, size, vprot );
1005 /***********************************************************************
1006 * VirtualProtectEx (KERNEL32.553)
1007 * Changes the access protection on a region of committed pages in the
1008 * virtual address space of a specified process
1014 BOOL WINAPI VirtualProtectEx(
1015 HANDLE handle, /* [in] Handle of process */
1016 LPVOID addr, /* [in] Address of region of committed pages */
1017 DWORD size, /* [in] Size of region */
1018 DWORD new_prot, /* [in] Desired access protection */
1019 LPDWORD old_prot /* [out] Address of variable to get old protection */ )
1021 if (MapProcessHandle( handle ) == GetCurrentProcessId())
1022 return VirtualProtect( addr, size, new_prot, old_prot );
1023 ERR("Unsupported on other process\n");
1028 /***********************************************************************
1029 * VirtualQuery (KERNEL32.554)
1030 * Provides info about a range of pages in virtual address space
1033 * Number of bytes returned in information buffer
1034 * or 0 if addr is >= 0xc0000000 (kernel space).
1036 DWORD WINAPI VirtualQuery(
1037 LPCVOID addr, /* [in] Address of region */
1038 LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1039 DWORD len /* [in] Size of buffer */
1043 UINT alloc_base = 0;
1046 if (addr >= (void*)0xc0000000) return 0;
1048 base = ROUND_ADDR( addr );
1050 /* Find the view containing the address */
1052 EnterCriticalSection(&csVirtual);
1053 view = VIRTUAL_FirstView;
1058 size = 0xffff0000 - alloc_base;
1061 if (view->base > base)
1063 size = view->base - alloc_base;
1067 if (view->base + view->size > base)
1069 alloc_base = view->base;
1073 alloc_base = view->base + view->size;
1076 LeaveCriticalSection(&csVirtual);
1078 /* Fill the info structure */
1082 info->State = MEM_FREE;
1084 info->AllocationProtect = 0;
1089 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1090 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1091 for (size = base - alloc_base; size < view->size; size += page_mask+1)
1092 if (view->prot[size >> page_shift] != vprot) break;
1093 info->AllocationProtect = view->protect;
1094 info->Type = MEM_PRIVATE; /* FIXME */
1097 info->BaseAddress = (LPVOID)base;
1098 info->AllocationBase = (LPVOID)alloc_base;
1099 info->RegionSize = size - (base - alloc_base);
1100 return sizeof(*info);
1104 /***********************************************************************
1105 * VirtualQueryEx (KERNEL32.555)
1106 * Provides info about a range of pages in virtual address space of a
1110 * Number of bytes returned in information buffer
1112 DWORD WINAPI VirtualQueryEx(
1113 HANDLE handle, /* [in] Handle of process */
1114 LPCVOID addr, /* [in] Address of region */
1115 LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1116 DWORD len /* [in] Size of buffer */ )
1118 if (MapProcessHandle( handle ) == GetCurrentProcessId())
1119 return VirtualQuery( addr, info, len );
1120 ERR("Unsupported on other process\n");
1125 /***********************************************************************
1126 * IsBadReadPtr (KERNEL32.354)
1129 * FALSE: Process has read access to entire block
1132 BOOL WINAPI IsBadReadPtr(
1133 LPCVOID ptr, /* [in] Address of memory block */
1134 UINT size ) /* [in] Size of block */
1136 if (!size) return FALSE; /* handle 0 size case w/o reference */
1139 volatile const char *p = ptr;
1143 while (count > page_size)
1150 dummy = p[count - 1];
1152 __EXCEPT(page_fault) { return TRUE; }
1158 /***********************************************************************
1159 * IsBadWritePtr (KERNEL32.357)
1162 * FALSE: Process has write access to entire block
1165 BOOL WINAPI IsBadWritePtr(
1166 LPVOID ptr, /* [in] Address of memory block */
1167 UINT size ) /* [in] Size of block in bytes */
1169 if (!size) return FALSE; /* handle 0 size case w/o reference */
1172 volatile char *p = ptr;
1175 while (count > page_size)
1184 __EXCEPT(page_fault) { return TRUE; }
1190 /***********************************************************************
1191 * IsBadHugeReadPtr (KERNEL32.352)
1193 * FALSE: Process has read access to entire block
1196 BOOL WINAPI IsBadHugeReadPtr(
1197 LPCVOID ptr, /* [in] Address of memory block */
1198 UINT size /* [in] Size of block */
1200 return IsBadReadPtr( ptr, size );
1204 /***********************************************************************
1205 * IsBadHugeWritePtr (KERNEL32.353)
1207 * FALSE: Process has write access to entire block
1210 BOOL WINAPI IsBadHugeWritePtr(
1211 LPVOID ptr, /* [in] Address of memory block */
1212 UINT size /* [in] Size of block */
1214 return IsBadWritePtr( ptr, size );
1218 /***********************************************************************
1219 * IsBadCodePtr (KERNEL32.351)
1222 * FALSE: Process has read access to specified memory
1225 BOOL WINAPI IsBadCodePtr( FARPROC ptr ) /* [in] Address of function */
1227 return IsBadReadPtr( ptr, 1 );
1231 /***********************************************************************
1232 * IsBadStringPtrA (KERNEL32.355)
1235 * FALSE: Read access to all bytes in string
1238 BOOL WINAPI IsBadStringPtrA(
1239 LPCSTR str, /* [in] Address of string */
1240 UINT max ) /* [in] Maximum size of string */
1244 volatile const char *p = str;
1245 while (p != str + max) if (!*p++) break;
1247 __EXCEPT(page_fault) { return TRUE; }
1253 /***********************************************************************
1254 * IsBadStringPtrW (KERNEL32.356)
1255 * See IsBadStringPtrA
1257 BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
1261 volatile const WCHAR *p = str;
1262 while (p != str + max) if (!*p++) break;
1264 __EXCEPT(page_fault) { return TRUE; }
1270 /***********************************************************************
1271 * CreateFileMappingA (KERNEL32.46)
1272 * Creates a named or unnamed file-mapping object for the specified file
1276 * 0: Mapping object does not exist
1279 HANDLE WINAPI CreateFileMappingA(
1280 HANDLE hFile, /* [in] Handle of file to map */
1281 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1282 DWORD protect, /* [in] Protection for mapping object */
1283 DWORD size_high, /* [in] High-order 32 bits of object size */
1284 DWORD size_low, /* [in] Low-order 32 bits of object size */
1285 LPCSTR name /* [in] Name of file-mapping object */ )
1289 DWORD len = name ? MultiByteToWideChar( CP_ACP, 0, name, strlen(name), NULL, 0 ) : 0;
1291 /* Check parameters */
1293 TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1294 hFile, sa, protect, size_high, size_low, debugstr_a(name) );
1298 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1301 vprot = VIRTUAL_GetProt( protect );
1302 if (protect & SEC_RESERVE)
1304 if (hFile != INVALID_HANDLE_VALUE)
1306 SetLastError( ERROR_INVALID_PARAMETER );
1310 else vprot |= VPROT_COMMITTED;
1311 if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1312 if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1314 /* Create the server object */
1316 if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1317 SERVER_START_VAR_REQ( create_mapping, len * sizeof(WCHAR) )
1319 req->file_handle = hFile;
1320 req->size_high = size_high;
1321 req->size_low = size_low;
1322 req->protect = vprot;
1323 req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1324 if (len) MultiByteToWideChar( CP_ACP, 0, name, strlen(name), server_data_ptr(req), len );
1334 /***********************************************************************
1335 * CreateFileMappingW (KERNEL32.47)
1336 * See CreateFileMappingA
1338 HANDLE WINAPI CreateFileMappingW( HANDLE hFile, LPSECURITY_ATTRIBUTES sa,
1339 DWORD protect, DWORD size_high,
1340 DWORD size_low, LPCWSTR name )
1344 DWORD len = name ? strlenW(name) : 0;
1346 /* Check parameters */
1348 TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1349 hFile, sa, protect, size_high, size_low, debugstr_w(name) );
1353 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1357 vprot = VIRTUAL_GetProt( protect );
1358 if (protect & SEC_RESERVE)
1360 if (hFile != INVALID_HANDLE_VALUE)
1362 SetLastError( ERROR_INVALID_PARAMETER );
1366 else vprot |= VPROT_COMMITTED;
1367 if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1368 if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1370 /* Create the server object */
1372 if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1373 SERVER_START_VAR_REQ( create_mapping, len * sizeof(WCHAR) )
1375 req->file_handle = hFile;
1376 req->size_high = size_high;
1377 req->size_low = size_low;
1378 req->protect = vprot;
1379 req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1380 memcpy( server_data_ptr(req), name, len * sizeof(WCHAR) );
1390 /***********************************************************************
1391 * OpenFileMappingA (KERNEL32.397)
1392 * Opens a named file-mapping object.
1398 HANDLE WINAPI OpenFileMappingA(
1399 DWORD access, /* [in] Access mode */
1400 BOOL inherit, /* [in] Inherit flag */
1401 LPCSTR name ) /* [in] Name of file-mapping object */
1404 DWORD len = name ? MultiByteToWideChar( CP_ACP, 0, name, strlen(name), NULL, 0 ) : 0;
1407 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1410 SERVER_START_VAR_REQ( open_mapping, len * sizeof(WCHAR) )
1412 req->access = access;
1413 req->inherit = inherit;
1414 if (len) MultiByteToWideChar( CP_ACP, 0, name, strlen(name), server_data_ptr(req), len );
1423 /***********************************************************************
1424 * OpenFileMappingW (KERNEL32.398)
1425 * See OpenFileMappingA
1427 HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
1430 DWORD len = name ? strlenW(name) : 0;
1433 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1436 SERVER_START_VAR_REQ( open_mapping, len * sizeof(WCHAR) )
1438 req->access = access;
1439 req->inherit = inherit;
1440 memcpy( server_data_ptr(req), name, len * sizeof(WCHAR) );
1449 /***********************************************************************
1450 * MapViewOfFile (KERNEL32.385)
1451 * Maps a view of a file into the address space
1454 * Starting address of mapped view
1457 LPVOID WINAPI MapViewOfFile(
1458 HANDLE mapping, /* [in] File-mapping object to map */
1459 DWORD access, /* [in] Access mode */
1460 DWORD offset_high, /* [in] High-order 32 bits of file offset */
1461 DWORD offset_low, /* [in] Low-order 32 bits of file offset */
1462 DWORD count /* [in] Number of bytes to map */
1464 return MapViewOfFileEx( mapping, access, offset_high,
1465 offset_low, count, NULL );
1469 /***********************************************************************
1470 * MapViewOfFileEx (KERNEL32.386)
1471 * Maps a view of a file into the address space
1474 * Starting address of mapped view
1477 LPVOID WINAPI MapViewOfFileEx(
1478 HANDLE handle, /* [in] File-mapping object to map */
1479 DWORD access, /* [in] Access mode */
1480 DWORD offset_high, /* [in] High-order 32 bits of file offset */
1481 DWORD offset_low, /* [in] Low-order 32 bits of file offset */
1482 DWORD count, /* [in] Number of bytes to map */
1483 LPVOID addr /* [in] Suggested starting address for mapped view */
1486 UINT ptr = (UINT)-1, size = 0;
1487 int flags = MAP_PRIVATE;
1488 int unix_handle = -1;
1491 DWORD size_low, size_high, header_size, shared_size;
1494 /* Check parameters */
1496 if ((offset_low & granularity_mask) ||
1497 (addr && ((UINT)addr & granularity_mask)))
1499 SetLastError( ERROR_INVALID_PARAMETER );
1503 SERVER_START_REQ( get_mapping_info )
1505 req->handle = handle;
1506 res = SERVER_CALL_ERR();
1507 prot = req->protect;
1509 size_low = req->size_low;
1510 size_high = req->size_high;
1511 header_size = req->header_size;
1512 shared_file = req->shared_file;
1513 shared_size = req->shared_size;
1516 if (res) goto error;
1518 if ((unix_handle = FILE_GetUnixHandle( handle, 0 )) == -1) goto error;
1520 if (prot & VPROT_IMAGE)
1521 return map_image( handle, unix_handle, base, size_low, header_size,
1522 shared_file, shared_size );
1525 if (size_high || offset_high)
1526 ERR("Offsets larger than 4Gb not supported\n");
1528 if ((offset_low >= size_low) ||
1529 (count > size_low - offset_low))
1531 SetLastError( ERROR_INVALID_PARAMETER );
1534 if (count) size = ROUND_SIZE( offset_low, count );
1535 else size = size_low - offset_low;
1539 case FILE_MAP_ALL_ACCESS:
1540 case FILE_MAP_WRITE:
1541 case FILE_MAP_WRITE | FILE_MAP_READ:
1542 if (!(prot & VPROT_WRITE))
1544 SetLastError( ERROR_INVALID_PARAMETER );
1551 case FILE_MAP_COPY | FILE_MAP_READ:
1552 if (prot & VPROT_READ) break;
1555 SetLastError( ERROR_INVALID_PARAMETER );
1559 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1560 * which has a view of this mapping commits some pages, they will
1561 * appear commited in all other processes, which have the same
1562 * view created. Since we don`t support this yet, we create the
1563 * whole mapping commited.
1565 prot |= VPROT_COMMITTED;
1569 TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low );
1571 ptr = (UINT)VIRTUAL_mmap( unix_handle, addr, size, offset_low,
1572 VIRTUAL_GetUnixProt( prot ), flags );
1573 if (ptr == (UINT)-1) {
1574 /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
1575 * Platform Differences":
1576 * Windows NT: ERROR_INVALID_PARAMETER
1577 * Windows 95: ERROR_INVALID_ADDRESS.
1580 SetLastError( ERROR_OUTOFMEMORY );
1583 if (GetVersion() & 0x80000000) /* win95 */
1585 TRACE("setting ERROR_INVALID_ADDRESS for WinXX\n");
1586 SetLastError( ERROR_INVALID_ADDRESS );
1590 TRACE("setting ERROR_INVALID_PARAMETER for NTXX\n");
1591 SetLastError( ERROR_INVALID_PARAMETER );
1597 if (!(view = VIRTUAL_CreateView( ptr, size, 0, prot, handle )))
1599 SetLastError( ERROR_OUTOFMEMORY );
1602 if (unix_handle != -1) close( unix_handle );
1606 if (unix_handle != -1) close( unix_handle );
1607 if (ptr != (UINT)-1) munmap( (void *)ptr, size );
1612 /***********************************************************************
1613 * FlushViewOfFile (KERNEL32.262)
1614 * Writes to the disk a byte range within a mapped view of a file
1620 BOOL WINAPI FlushViewOfFile(
1621 LPCVOID base, /* [in] Start address of byte range to flush */
1622 DWORD cbFlush /* [in] Number of bytes in range */
1625 UINT addr = ROUND_ADDR( base );
1627 TRACE("FlushViewOfFile at %p for %ld bytes\n",
1630 if (!(view = VIRTUAL_FindView( addr )))
1632 SetLastError( ERROR_INVALID_PARAMETER );
1635 if (!cbFlush) cbFlush = view->size;
1636 if (!msync( (void *)addr, cbFlush, MS_SYNC )) return TRUE;
1637 SetLastError( ERROR_INVALID_PARAMETER );
1642 /***********************************************************************
1643 * UnmapViewOfFile (KERNEL32.540)
1644 * Unmaps a mapped view of a file.
1647 * Should addr be an LPCVOID?
1653 BOOL WINAPI UnmapViewOfFile(
1654 LPVOID addr /* [in] Address where mapped view begins */
1657 UINT base = ROUND_ADDR( addr );
1658 if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1660 SetLastError( ERROR_INVALID_PARAMETER );
1663 VIRTUAL_DeleteView( view );