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 vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
373 case PAGE_EXECUTE_READ:
374 vprot = VPROT_EXEC | VPROT_READ;
376 case PAGE_EXECUTE_READWRITE:
377 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE;
379 case PAGE_EXECUTE_WRITECOPY:
380 vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY;
387 if (protect & PAGE_GUARD) vprot |= VPROT_GUARD;
388 if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE;
393 /***********************************************************************
396 * Change the protection of a range of pages.
402 static BOOL VIRTUAL_SetProt(
403 FILE_VIEW *view, /* [in] Pointer to view */
404 UINT base, /* [in] Starting address */
405 UINT size, /* [in] Size in bytes */
406 BYTE vprot /* [in] Protections to use */
408 TRACE("%08x-%08x %s\n",
409 base, base + size - 1, VIRTUAL_GetProtStr( vprot ) );
411 if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) ))
412 return FALSE; /* FIXME: last error */
414 memset( view->prot + ((base - view->base) >> page_shift),
415 vprot, size >> page_shift );
416 VIRTUAL_DEBUG_DUMP_VIEW( view );
421 /***********************************************************************
424 * Map an executable (PE format) image into memory.
426 static LPVOID map_image( HANDLE hmapping, int fd, char *base, DWORD total_size,
427 DWORD header_size, HANDLE shared_file, DWORD shared_size )
429 IMAGE_DOS_HEADER *dos;
430 IMAGE_NT_HEADERS *nt;
431 IMAGE_SECTION_HEADER *sec;
433 DWORD err = GetLastError();
434 FILE_VIEW *view = NULL;
438 SetLastError( ERROR_BAD_EXE_FORMAT ); /* generic error */
440 /* zero-map the whole range */
442 if ((ptr = wine_anon_mmap( base, total_size,
443 PROT_READ | PROT_WRITE | PROT_EXEC, 0 )) == (char *)-1)
445 ptr = wine_anon_mmap( NULL, total_size,
446 PROT_READ | PROT_WRITE | PROT_EXEC, 0 );
447 if (ptr == (char *)-1)
449 ERR_(module)("Not enough memory for module (%ld bytes)\n", total_size);
453 TRACE_(module)( "mapped PE file at %p-%p\n", ptr, ptr + total_size );
455 if (!(view = VIRTUAL_CreateView( (UINT)ptr, total_size, 0,
456 VPROT_COMMITTED|VPROT_READ|VPROT_WRITE|VPROT_WRITECOPY,
459 munmap( ptr, total_size );
460 SetLastError( ERROR_OUTOFMEMORY );
466 if (VIRTUAL_mmap( fd, ptr, header_size, 0, PROT_READ | PROT_WRITE,
467 MAP_PRIVATE | MAP_FIXED ) == (char *)-1) goto error;
468 dos = (IMAGE_DOS_HEADER *)ptr;
469 nt = (IMAGE_NT_HEADERS *)(ptr + dos->e_lfanew);
470 if ((char *)(nt + 1) > ptr + header_size) goto error;
472 sec = (IMAGE_SECTION_HEADER*)((char*)&nt->OptionalHeader+nt->FileHeader.SizeOfOptionalHeader);
473 if ((char *)(sec + nt->FileHeader.NumberOfSections) > ptr + header_size) goto error;
475 /* check the architecture */
477 if (nt->FileHeader.Machine != IMAGE_FILE_MACHINE_I386)
479 MESSAGE("Trying to load PE image for unsupported architecture (");
480 switch (nt->FileHeader.Machine)
482 case IMAGE_FILE_MACHINE_UNKNOWN: MESSAGE("Unknown"); break;
483 case IMAGE_FILE_MACHINE_I860: MESSAGE("I860"); break;
484 case IMAGE_FILE_MACHINE_R3000: MESSAGE("R3000"); break;
485 case IMAGE_FILE_MACHINE_R4000: MESSAGE("R4000"); break;
486 case IMAGE_FILE_MACHINE_R10000: MESSAGE("R10000"); break;
487 case IMAGE_FILE_MACHINE_ALPHA: MESSAGE("Alpha"); break;
488 case IMAGE_FILE_MACHINE_POWERPC: MESSAGE("PowerPC"); break;
489 default: MESSAGE("Unknown-%04x", nt->FileHeader.Machine); break;
495 /* retrieve the shared sections file */
499 if ((shared_fd = FILE_GetUnixHandle( shared_file, GENERIC_READ )) == -1) goto error;
500 CloseHandle( shared_file ); /* we no longer need it */
504 /* map all the sections */
506 for (i = pos = 0; i < nt->FileHeader.NumberOfSections; i++, sec++)
510 /* a few sanity checks */
511 size = sec->VirtualAddress + ROUND_SIZE( sec->VirtualAddress, sec->Misc.VirtualSize );
512 if (sec->VirtualAddress > total_size || size > total_size || size < sec->VirtualAddress)
514 ERR_(module)( "Section %.8s too large (%lx+%lx/%lx)\n",
515 sec->Name, sec->VirtualAddress, sec->Misc.VirtualSize, total_size );
519 if ((sec->Characteristics & IMAGE_SCN_MEM_SHARED) &&
520 (sec->Characteristics & IMAGE_SCN_MEM_WRITE))
522 size = ROUND_SIZE( 0, sec->Misc.VirtualSize );
523 TRACE_(module)( "mapping shared section %.8s at %p off %lx (%x) size %lx (%lx) flags %lx\n",
524 sec->Name, (char *)ptr + sec->VirtualAddress,
525 sec->PointerToRawData, pos, sec->SizeOfRawData,
526 size, sec->Characteristics );
527 if (VIRTUAL_mmap( shared_fd, (char *)ptr + sec->VirtualAddress, size,
528 pos, PROT_READ|PROT_WRITE|PROT_EXEC,
529 MAP_SHARED|MAP_FIXED ) == (void *)-1)
531 ERR_(module)( "Could not map shared section %.8s\n", sec->Name );
538 if (sec->Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) continue;
539 if (!sec->PointerToRawData || !sec->SizeOfRawData) continue;
541 TRACE_(module)( "mapping section %.8s at %p off %lx size %lx flags %lx\n",
542 sec->Name, (char *)ptr + sec->VirtualAddress,
543 sec->PointerToRawData, sec->SizeOfRawData,
544 sec->Characteristics );
546 /* Note: if the section is not aligned properly VIRTUAL_mmap will magically
547 * fall back to read(), so we don't need to check anything here.
549 if (VIRTUAL_mmap( fd, (char *)ptr + sec->VirtualAddress, sec->SizeOfRawData,
550 sec->PointerToRawData, PROT_READ|PROT_WRITE|PROT_EXEC,
551 MAP_PRIVATE | MAP_FIXED ) == (void *)-1)
553 ERR_(module)( "Could not map section %.8s, file probably truncated\n", sec->Name );
557 if ((sec->SizeOfRawData < sec->Misc.VirtualSize) && (sec->SizeOfRawData & page_mask))
559 DWORD end = ROUND_SIZE( 0, sec->SizeOfRawData );
560 if (end > sec->Misc.VirtualSize) end = sec->Misc.VirtualSize;
561 TRACE_(module)("clearing %p - %p\n",
562 (char *)ptr + sec->VirtualAddress + sec->SizeOfRawData,
563 (char *)ptr + sec->VirtualAddress + end );
564 memset( (char *)ptr + sec->VirtualAddress + sec->SizeOfRawData, 0,
565 end - sec->SizeOfRawData );
569 SetLastError( err ); /* restore last error */
571 if (shared_fd != -1) close( shared_fd );
575 if (view) VIRTUAL_DeleteView( view );
577 if (shared_fd != -1) close( shared_fd );
578 if (shared_file) CloseHandle( shared_file );
583 /***********************************************************************
587 DECL_GLOBAL_CONSTRUCTOR(VIRTUAL_Init)
589 page_size = getpagesize();
590 page_mask = page_size - 1;
591 /* Make sure we have a power of 2 */
592 assert( !(page_size & page_mask) );
594 while ((1 << page_shift) != page_size) page_shift++;
596 #endif /* page_mask */
599 /***********************************************************************
600 * VIRTUAL_SetFaultHandler
602 BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg )
606 if (!(view = VIRTUAL_FindView((UINT)addr))) return FALSE;
607 view->handlerProc = proc;
608 view->handlerArg = arg;
612 /***********************************************************************
613 * VIRTUAL_HandleFault
615 DWORD VIRTUAL_HandleFault( LPCVOID addr )
617 FILE_VIEW *view = VIRTUAL_FindView((UINT)addr);
618 DWORD ret = EXCEPTION_ACCESS_VIOLATION;
622 if (view->handlerProc)
624 if (view->handlerProc(view->handlerArg, addr)) ret = 0; /* handled */
628 BYTE vprot = view->prot[((UINT)addr - view->base) >> page_shift];
629 UINT page = (UINT)addr & ~page_mask;
630 char *stack = (char *)NtCurrentTeb()->stack_base + SIGNAL_STACK_SIZE + page_mask + 1;
631 if (vprot & VPROT_GUARD)
633 VIRTUAL_SetProt( view, page, page_mask + 1, vprot & ~VPROT_GUARD );
634 ret = STATUS_GUARD_PAGE_VIOLATION;
636 /* is it inside the stack guard pages? */
637 if (((char *)addr >= stack) && ((char *)addr < stack + 2*(page_mask+1)))
638 ret = STATUS_STACK_OVERFLOW;
645 /***********************************************************************
648 * Wrapper for mmap() that handles anonymous mappings portably,
649 * and falls back to read if mmap of a file fails.
651 static LPVOID VIRTUAL_mmap( int fd, LPVOID start, DWORD size,
652 DWORD offset, int prot, int flags )
657 if (fd == -1) return wine_anon_mmap( start, size, prot, flags );
659 if ((ret = mmap( start, size, prot, flags, fd, offset )) != (LPVOID)-1)
662 /* mmap() failed; if this is because the file offset is not */
663 /* page-aligned (EINVAL), or because the underlying filesystem */
664 /* does not support mmap() (ENOEXEC,ENODEV), we do it by hand. */
666 if ((errno != ENOEXEC) && (errno != EINVAL) && (errno != ENODEV)) return ret;
667 if (prot & PROT_WRITE)
669 /* We cannot fake shared write mappings */
671 if (flags & MAP_SHARED) return ret;
674 if (!(flags & MAP_PRIVATE)) return ret;
678 /* Reserve the memory with an anonymous mmap */
679 ret = wine_anon_mmap( start, size, PROT_READ | PROT_WRITE, flags );
680 if (ret == (LPVOID)-1) return ret;
681 /* Now read in the file */
682 if ((pos = lseek( fd, offset, SEEK_SET )) == -1)
687 read( fd, ret, size );
688 lseek( fd, pos, SEEK_SET ); /* Restore the file pointer */
689 mprotect( ret, size, prot ); /* Set the right protection */
694 /***********************************************************************
695 * VirtualAlloc (KERNEL32.548)
696 * Reserves or commits a region of pages in virtual address space
699 * Base address of allocated region of pages
702 LPVOID WINAPI VirtualAlloc(
703 LPVOID addr, /* [in] Address of region to reserve or commit */
704 DWORD size, /* [in] Size of region */
705 DWORD type, /* [in] Type of allocation */
706 DWORD protect /* [in] Type of access protection */
709 UINT base, ptr, view_size;
712 TRACE("%08x %08lx %lx %08lx\n",
713 (UINT)addr, size, type, protect );
715 /* Round parameters to a page boundary */
717 if (size > 0x7fc00000) /* 2Gb - 4Mb */
719 SetLastError( ERROR_OUTOFMEMORY );
724 if (type & MEM_RESERVE) /* Round down to 64k boundary */
725 base = (UINT)addr & ~granularity_mask;
727 base = ROUND_ADDR( addr );
728 size = (((UINT)addr + size + page_mask) & ~page_mask) - base;
729 if ((base <= granularity_mask) || (base + size < base))
731 /* disallow low 64k and wrap-around */
732 SetLastError( ERROR_INVALID_PARAMETER );
739 size = (size + page_mask) & ~page_mask;
742 if (type & MEM_TOP_DOWN) {
743 /* FIXME: MEM_TOP_DOWN allocates the largest possible address.
744 * Is there _ANY_ way to do it with UNIX mmap()?
746 WARN("MEM_TOP_DOWN ignored\n");
747 type &= ~MEM_TOP_DOWN;
749 /* Compute the alloc type flags */
751 if (!(type & (MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)) ||
752 (type & ~(MEM_COMMIT | MEM_RESERVE | MEM_SYSTEM)))
754 ERR("called with wrong alloc type flags (%08lx) !\n", type);
755 SetLastError( ERROR_INVALID_PARAMETER );
758 if (type & (MEM_COMMIT | MEM_SYSTEM))
759 vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED;
762 /* Reserve the memory */
764 if ((type & MEM_RESERVE) || !base)
766 view_size = size + (base ? 0 : granularity_mask + 1);
767 if (type & MEM_SYSTEM)
770 ptr = (UINT)wine_anon_mmap( (LPVOID)base, view_size, VIRTUAL_GetUnixProt( vprot ), 0 );
773 SetLastError( ERROR_OUTOFMEMORY );
778 /* Release the extra memory while keeping the range */
779 /* starting on a 64k boundary. */
781 if (ptr & granularity_mask)
783 UINT extra = granularity_mask + 1 - (ptr & granularity_mask);
784 munmap( (void *)ptr, extra );
788 if (view_size > size)
789 munmap( (void *)(ptr + size), view_size - size );
791 else if (ptr != base)
793 /* We couldn't get the address we wanted */
794 munmap( (void *)ptr, view_size );
795 SetLastError( ERROR_INVALID_ADDRESS );
798 if (!(view = VIRTUAL_CreateView( ptr, size,
799 VFLAG_VALLOC | ((type & MEM_SYSTEM) ? VFLAG_SYSTEM : 0),
802 munmap( (void *)ptr, size );
803 SetLastError( ERROR_OUTOFMEMORY );
809 /* Commit the pages */
811 if (!(view = VIRTUAL_FindView( base )) ||
812 (base + size > view->base + view->size))
814 SetLastError( ERROR_INVALID_ADDRESS );
818 if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL;
823 /***********************************************************************
824 * VirtualAllocEx (KERNEL32.548)
826 * Seems to be just as VirtualAlloc, but with process handle.
828 LPVOID WINAPI VirtualAllocEx(
829 HANDLE hProcess, /* [in] Handle of process to do mem operation */
830 LPVOID addr, /* [in] Address of region to reserve or commit */
831 DWORD size, /* [in] Size of region */
832 DWORD type, /* [in] Type of allocation */
833 DWORD protect /* [in] Type of access protection */
835 if (MapProcessHandle( hProcess ) == GetCurrentProcessId())
836 return VirtualAlloc( addr, size, type, protect );
837 ERR("Unsupported on other process\n");
842 /***********************************************************************
843 * VirtualFree (KERNEL32.550)
844 * Release or decommits a region of pages in virtual address space.
850 BOOL WINAPI VirtualFree(
851 LPVOID addr, /* [in] Address of region of committed pages */
852 DWORD size, /* [in] Size of region */
853 DWORD type /* [in] Type of operation */
858 TRACE("%08x %08lx %lx\n",
859 (UINT)addr, size, type );
861 /* Fix the parameters */
863 size = ROUND_SIZE( addr, size );
864 base = ROUND_ADDR( addr );
866 if (!(view = VIRTUAL_FindView( base )) ||
867 (base + size > view->base + view->size) ||
868 !(view->flags & VFLAG_VALLOC))
870 SetLastError( ERROR_INVALID_PARAMETER );
874 /* Compute the protection flags */
876 if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE))
878 ERR("called with wrong free type flags (%08lx) !\n", type);
879 SetLastError( ERROR_INVALID_PARAMETER );
885 if (type == MEM_RELEASE)
887 if (size || (base != view->base))
889 SetLastError( ERROR_INVALID_PARAMETER );
892 VIRTUAL_DeleteView( view );
896 /* Decommit the pages by remapping zero-pages instead */
898 if (wine_anon_mmap( (LPVOID)base, size, VIRTUAL_GetUnixProt(0), MAP_FIXED ) != (LPVOID)base)
899 ERR( "Could not remap pages, expect trouble\n" );
900 return VIRTUAL_SetProt( view, base, size, 0 );
904 /***********************************************************************
905 * VirtualLock (KERNEL32.551)
906 * Locks the specified region of virtual address space
909 * Always returns TRUE
915 BOOL WINAPI VirtualLock(
916 LPVOID addr, /* [in] Address of first byte of range to lock */
917 DWORD size /* [in] Number of bytes in range to lock */
923 /***********************************************************************
924 * VirtualUnlock (KERNEL32.556)
925 * Unlocks a range of pages in the virtual address space
928 * Always returns TRUE
934 BOOL WINAPI VirtualUnlock(
935 LPVOID addr, /* [in] Address of first byte of range */
936 DWORD size /* [in] Number of bytes in range */
942 /***********************************************************************
943 * VirtualProtect (KERNEL32.552)
944 * Changes the access protection on a region of committed pages
950 BOOL WINAPI VirtualProtect(
951 LPVOID addr, /* [in] Address of region of committed pages */
952 DWORD size, /* [in] Size of region */
953 DWORD new_prot, /* [in] Desired access protection */
954 LPDWORD old_prot /* [out] Address of variable to get old protection */
960 TRACE("%08x %08lx %08lx\n",
961 (UINT)addr, size, new_prot );
963 /* Fix the parameters */
965 size = ROUND_SIZE( addr, size );
966 base = ROUND_ADDR( addr );
968 if (!(view = VIRTUAL_FindView( base )) ||
969 (base + size > view->base + view->size))
971 SetLastError( ERROR_INVALID_PARAMETER );
975 /* Make sure all the pages are committed */
977 p = view->prot + ((base - view->base) >> page_shift);
978 for (i = size >> page_shift; i; i--, p++)
980 if (!(*p & VPROT_COMMITTED))
982 SetLastError( ERROR_INVALID_PARAMETER );
987 if (old_prot) VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL );
988 vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED;
989 return VIRTUAL_SetProt( view, base, size, vprot );
993 /***********************************************************************
994 * VirtualProtectEx (KERNEL32.553)
995 * Changes the access protection on a region of committed pages in the
996 * virtual address space of a specified process
1002 BOOL WINAPI VirtualProtectEx(
1003 HANDLE handle, /* [in] Handle of process */
1004 LPVOID addr, /* [in] Address of region of committed pages */
1005 DWORD size, /* [in] Size of region */
1006 DWORD new_prot, /* [in] Desired access protection */
1007 LPDWORD old_prot /* [out] Address of variable to get old protection */ )
1009 if (MapProcessHandle( handle ) == GetCurrentProcessId())
1010 return VirtualProtect( addr, size, new_prot, old_prot );
1011 ERR("Unsupported on other process\n");
1016 /***********************************************************************
1017 * VirtualQuery (KERNEL32.554)
1018 * Provides info about a range of pages in virtual address space
1021 * Number of bytes returned in information buffer
1022 * or 0 if addr is >= 0xc0000000 (kernel space).
1024 DWORD WINAPI VirtualQuery(
1025 LPCVOID addr, /* [in] Address of region */
1026 LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1027 DWORD len /* [in] Size of buffer */
1031 UINT alloc_base = 0;
1034 if (addr >= (void*)0xc0000000) return 0;
1036 base = ROUND_ADDR( addr );
1038 /* Find the view containing the address */
1040 EnterCriticalSection(&csVirtual);
1041 view = VIRTUAL_FirstView;
1046 size = 0xffff0000 - alloc_base;
1049 if (view->base > base)
1051 size = view->base - alloc_base;
1055 if (view->base + view->size > base)
1057 alloc_base = view->base;
1061 alloc_base = view->base + view->size;
1064 LeaveCriticalSection(&csVirtual);
1066 /* Fill the info structure */
1070 info->State = MEM_FREE;
1072 info->AllocationProtect = 0;
1077 BYTE vprot = view->prot[(base - alloc_base) >> page_shift];
1078 VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State );
1079 for (size = base - alloc_base; size < view->size; size += page_mask+1)
1080 if (view->prot[size >> page_shift] != vprot) break;
1081 info->AllocationProtect = view->protect;
1082 info->Type = MEM_PRIVATE; /* FIXME */
1085 info->BaseAddress = (LPVOID)base;
1086 info->AllocationBase = (LPVOID)alloc_base;
1087 info->RegionSize = size - (base - alloc_base);
1088 return sizeof(*info);
1092 /***********************************************************************
1093 * VirtualQueryEx (KERNEL32.555)
1094 * Provides info about a range of pages in virtual address space of a
1098 * Number of bytes returned in information buffer
1100 DWORD WINAPI VirtualQueryEx(
1101 HANDLE handle, /* [in] Handle of process */
1102 LPCVOID addr, /* [in] Address of region */
1103 LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */
1104 DWORD len /* [in] Size of buffer */ )
1106 if (MapProcessHandle( handle ) == GetCurrentProcessId())
1107 return VirtualQuery( addr, info, len );
1108 ERR("Unsupported on other process\n");
1113 /***********************************************************************
1114 * IsBadReadPtr (KERNEL32.354)
1117 * FALSE: Process has read access to entire block
1120 BOOL WINAPI IsBadReadPtr(
1121 LPCVOID ptr, /* [in] Address of memory block */
1122 UINT size ) /* [in] Size of block */
1124 if (!size) return FALSE; /* handle 0 size case w/o reference */
1127 volatile const char *p = ptr;
1131 while (count > page_size)
1138 dummy = p[count - 1];
1140 __EXCEPT(page_fault) { return TRUE; }
1146 /***********************************************************************
1147 * IsBadWritePtr (KERNEL32.357)
1150 * FALSE: Process has write access to entire block
1153 BOOL WINAPI IsBadWritePtr(
1154 LPVOID ptr, /* [in] Address of memory block */
1155 UINT size ) /* [in] Size of block in bytes */
1157 if (!size) return FALSE; /* handle 0 size case w/o reference */
1160 volatile char *p = ptr;
1163 while (count > page_size)
1172 __EXCEPT(page_fault) { return TRUE; }
1178 /***********************************************************************
1179 * IsBadHugeReadPtr (KERNEL32.352)
1181 * FALSE: Process has read access to entire block
1184 BOOL WINAPI IsBadHugeReadPtr(
1185 LPCVOID ptr, /* [in] Address of memory block */
1186 UINT size /* [in] Size of block */
1188 return IsBadReadPtr( ptr, size );
1192 /***********************************************************************
1193 * IsBadHugeWritePtr (KERNEL32.353)
1195 * FALSE: Process has write access to entire block
1198 BOOL WINAPI IsBadHugeWritePtr(
1199 LPVOID ptr, /* [in] Address of memory block */
1200 UINT size /* [in] Size of block */
1202 return IsBadWritePtr( ptr, size );
1206 /***********************************************************************
1207 * IsBadCodePtr (KERNEL32.351)
1210 * FALSE: Process has read access to specified memory
1213 BOOL WINAPI IsBadCodePtr( FARPROC ptr ) /* [in] Address of function */
1215 return IsBadReadPtr( ptr, 1 );
1219 /***********************************************************************
1220 * IsBadStringPtrA (KERNEL32.355)
1223 * FALSE: Read access to all bytes in string
1226 BOOL WINAPI IsBadStringPtrA(
1227 LPCSTR str, /* [in] Address of string */
1228 UINT max ) /* [in] Maximum size of string */
1232 volatile const char *p = str;
1233 while (p != str + max) if (!*p++) break;
1235 __EXCEPT(page_fault) { return TRUE; }
1241 /***********************************************************************
1242 * IsBadStringPtrW (KERNEL32.356)
1243 * See IsBadStringPtrA
1245 BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max )
1249 volatile const WCHAR *p = str;
1250 while (p != str + max) if (!*p++) break;
1252 __EXCEPT(page_fault) { return TRUE; }
1258 /***********************************************************************
1259 * CreateFileMappingA (KERNEL32.46)
1260 * Creates a named or unnamed file-mapping object for the specified file
1264 * 0: Mapping object does not exist
1267 HANDLE WINAPI CreateFileMappingA(
1268 HANDLE hFile, /* [in] Handle of file to map */
1269 SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/
1270 DWORD protect, /* [in] Protection for mapping object */
1271 DWORD size_high, /* [in] High-order 32 bits of object size */
1272 DWORD size_low, /* [in] Low-order 32 bits of object size */
1273 LPCSTR name /* [in] Name of file-mapping object */ )
1277 DWORD len = name ? MultiByteToWideChar( CP_ACP, 0, name, strlen(name), NULL, 0 ) : 0;
1279 /* Check parameters */
1281 TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1282 hFile, sa, protect, size_high, size_low, debugstr_a(name) );
1286 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1289 vprot = VIRTUAL_GetProt( protect );
1290 if (protect & SEC_RESERVE)
1292 if (hFile != INVALID_HANDLE_VALUE)
1294 SetLastError( ERROR_INVALID_PARAMETER );
1298 else vprot |= VPROT_COMMITTED;
1299 if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1300 if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1302 /* Create the server object */
1304 if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1307 struct create_mapping_request *req = server_alloc_req( sizeof(*req),
1308 len * sizeof(WCHAR) );
1309 req->file_handle = hFile;
1310 req->size_high = size_high;
1311 req->size_low = size_low;
1312 req->protect = vprot;
1313 req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1314 if (len) MultiByteToWideChar( CP_ACP, 0, name, strlen(name), server_data_ptr(req), len );
1316 server_call( REQ_CREATE_MAPPING );
1324 /***********************************************************************
1325 * CreateFileMappingW (KERNEL32.47)
1326 * See CreateFileMappingA
1328 HANDLE WINAPI CreateFileMappingW( HANDLE hFile, LPSECURITY_ATTRIBUTES sa,
1329 DWORD protect, DWORD size_high,
1330 DWORD size_low, LPCWSTR name )
1334 DWORD len = name ? strlenW(name) : 0;
1336 /* Check parameters */
1338 TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n",
1339 hFile, sa, protect, size_high, size_low, debugstr_w(name) );
1343 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1347 vprot = VIRTUAL_GetProt( protect );
1348 if (protect & SEC_RESERVE)
1350 if (hFile != INVALID_HANDLE_VALUE)
1352 SetLastError( ERROR_INVALID_PARAMETER );
1356 else vprot |= VPROT_COMMITTED;
1357 if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE;
1358 if (protect & SEC_IMAGE) vprot |= VPROT_IMAGE;
1360 /* Create the server object */
1362 if (hFile == INVALID_HANDLE_VALUE) hFile = 0;
1365 struct create_mapping_request *req = server_alloc_req( sizeof(*req),
1366 len * sizeof(WCHAR) );
1367 req->file_handle = hFile;
1368 req->size_high = size_high;
1369 req->size_low = size_low;
1370 req->protect = vprot;
1371 req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
1372 memcpy( server_data_ptr(req), name, len * sizeof(WCHAR) );
1374 server_call( REQ_CREATE_MAPPING );
1382 /***********************************************************************
1383 * OpenFileMappingA (KERNEL32.397)
1384 * Opens a named file-mapping object.
1390 HANDLE WINAPI OpenFileMappingA(
1391 DWORD access, /* [in] Access mode */
1392 BOOL inherit, /* [in] Inherit flag */
1393 LPCSTR name ) /* [in] Name of file-mapping object */
1396 DWORD len = name ? MultiByteToWideChar( CP_ACP, 0, name, strlen(name), NULL, 0 ) : 0;
1399 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1404 struct open_mapping_request *req = server_alloc_req( sizeof(*req), len * sizeof(WCHAR) );
1406 req->access = access;
1407 req->inherit = inherit;
1408 if (len) MultiByteToWideChar( CP_ACP, 0, name, strlen(name), server_data_ptr(req), len );
1409 server_call( REQ_OPEN_MAPPING );
1417 /***********************************************************************
1418 * OpenFileMappingW (KERNEL32.398)
1419 * See OpenFileMappingA
1421 HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name)
1424 DWORD len = name ? strlenW(name) : 0;
1427 SetLastError( ERROR_FILENAME_EXCED_RANGE );
1432 struct open_mapping_request *req = server_alloc_req( sizeof(*req), len * sizeof(WCHAR) );
1434 req->access = access;
1435 req->inherit = inherit;
1436 memcpy( server_data_ptr(req), name, len * sizeof(WCHAR) );
1437 server_call( REQ_OPEN_MAPPING );
1445 /***********************************************************************
1446 * MapViewOfFile (KERNEL32.385)
1447 * Maps a view of a file into the address space
1450 * Starting address of mapped view
1453 LPVOID WINAPI MapViewOfFile(
1454 HANDLE mapping, /* [in] File-mapping object to map */
1455 DWORD access, /* [in] Access mode */
1456 DWORD offset_high, /* [in] High-order 32 bits of file offset */
1457 DWORD offset_low, /* [in] Low-order 32 bits of file offset */
1458 DWORD count /* [in] Number of bytes to map */
1460 return MapViewOfFileEx( mapping, access, offset_high,
1461 offset_low, count, NULL );
1465 /***********************************************************************
1466 * MapViewOfFileEx (KERNEL32.386)
1467 * Maps a view of a file into the address space
1470 * Starting address of mapped view
1473 LPVOID WINAPI MapViewOfFileEx(
1474 HANDLE handle, /* [in] File-mapping object to map */
1475 DWORD access, /* [in] Access mode */
1476 DWORD offset_high, /* [in] High-order 32 bits of file offset */
1477 DWORD offset_low, /* [in] Low-order 32 bits of file offset */
1478 DWORD count, /* [in] Number of bytes to map */
1479 LPVOID addr /* [in] Suggested starting address for mapped view */
1482 UINT ptr = (UINT)-1, size = 0;
1483 int flags = MAP_PRIVATE;
1484 int unix_handle = -1;
1485 int prot, anonymous, res;
1487 DWORD size_low, size_high, header_size, shared_size;
1490 /* Check parameters */
1492 if ((offset_low & granularity_mask) ||
1493 (addr && ((UINT)addr & granularity_mask)))
1495 SetLastError( ERROR_INVALID_PARAMETER );
1501 struct get_mapping_info_request *req = server_alloc_req( sizeof(*req), 0 );
1502 req->handle = handle;
1503 res = server_call( REQ_GET_MAPPING_INFO );
1504 prot = req->protect;
1506 size_low = req->size_low;
1507 size_high = req->size_high;
1508 header_size = req->header_size;
1509 shared_file = req->shared_file;
1510 shared_size = req->shared_size;
1511 anonymous = req->anonymous;
1514 if (res) goto error;
1518 if ((unix_handle = FILE_GetUnixHandle( handle, 0 )) == -1) goto error;
1521 if (prot & VPROT_IMAGE)
1522 return map_image( handle, unix_handle, base, size_low, header_size,
1523 shared_file, shared_size );
1526 if (size_high || offset_high)
1527 ERR("Offsets larger than 4Gb not supported\n");
1529 if ((offset_low >= size_low) ||
1530 (count > size_low - offset_low))
1532 SetLastError( ERROR_INVALID_PARAMETER );
1535 if (count) size = ROUND_SIZE( offset_low, count );
1536 else size = size_low - offset_low;
1540 case FILE_MAP_ALL_ACCESS:
1541 case FILE_MAP_WRITE:
1542 case FILE_MAP_WRITE | FILE_MAP_READ:
1543 if (!(prot & VPROT_WRITE))
1545 SetLastError( ERROR_INVALID_PARAMETER );
1552 case FILE_MAP_COPY | FILE_MAP_READ:
1553 if (prot & VPROT_READ) break;
1556 SetLastError( ERROR_INVALID_PARAMETER );
1560 /* FIXME: If a mapping is created with SEC_RESERVE and a process,
1561 * which has a view of this mapping commits some pages, they will
1562 * appear commited in all other processes, which have the same
1563 * view created. Since we don`t support this yet, we create the
1564 * whole mapping commited.
1566 prot |= VPROT_COMMITTED;
1570 TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low );
1572 ptr = (UINT)VIRTUAL_mmap( unix_handle, addr, size, offset_low,
1573 VIRTUAL_GetUnixProt( prot ), flags );
1574 if (ptr == (UINT)-1) {
1575 /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
1576 * Platform Differences":
1577 * Windows NT: ERROR_INVALID_PARAMETER
1578 * Windows 95: ERROR_INVALID_ADDRESS.
1581 SetLastError( ERROR_OUTOFMEMORY );
1584 if (GetVersion() & 0x80000000) /* win95 */
1586 TRACE("setting ERROR_INVALID_ADDRESS for WinXX\n");
1587 SetLastError( ERROR_INVALID_ADDRESS );
1591 TRACE("setting ERROR_INVALID_PARAMETER for NTXX\n");
1592 SetLastError( ERROR_INVALID_PARAMETER );
1598 if (!(view = VIRTUAL_CreateView( ptr, size, 0, prot, handle )))
1600 SetLastError( ERROR_OUTOFMEMORY );
1603 if (unix_handle != -1) close( unix_handle );
1607 if (unix_handle != -1) close( unix_handle );
1608 if (ptr != (UINT)-1) munmap( (void *)ptr, size );
1613 /***********************************************************************
1614 * FlushViewOfFile (KERNEL32.262)
1615 * Writes to the disk a byte range within a mapped view of a file
1621 BOOL WINAPI FlushViewOfFile(
1622 LPCVOID base, /* [in] Start address of byte range to flush */
1623 DWORD cbFlush /* [in] Number of bytes in range */
1626 UINT addr = ROUND_ADDR( base );
1628 TRACE("FlushViewOfFile at %p for %ld bytes\n",
1631 if (!(view = VIRTUAL_FindView( addr )))
1633 SetLastError( ERROR_INVALID_PARAMETER );
1636 if (!cbFlush) cbFlush = view->size;
1637 if (!msync( (void *)addr, cbFlush, MS_SYNC )) return TRUE;
1638 SetLastError( ERROR_INVALID_PARAMETER );
1643 /***********************************************************************
1644 * UnmapViewOfFile (KERNEL32.540)
1645 * Unmaps a mapped view of a file.
1648 * Should addr be an LPCVOID?
1654 BOOL WINAPI UnmapViewOfFile(
1655 LPVOID addr /* [in] Address where mapped view begins */
1658 UINT base = ROUND_ADDR( addr );
1659 if (!(view = VIRTUAL_FindView( base )) || (base != view->base))
1661 SetLastError( ERROR_INVALID_PARAMETER );
1664 VIRTUAL_DeleteView( view );