/* * Win32 virtual memory functions * * Copyright 1997 Alexandre Julliard */ #include #include #include #include #include #include #include #include #include "winbase.h" #include "winerror.h" #include "file.h" #include "heap.h" #include "process.h" #include "xmalloc.h" #include "stddebug.h" #include "debug.h" #ifndef MS_SYNC #define MS_SYNC 0 #endif /* File mapping */ typedef struct { K32OBJ header; DWORD size_high; DWORD size_low; FILE_OBJECT *file; BYTE protect; } FILE_MAPPING; /* File view */ typedef struct _FV { struct _FV *next; /* Next view */ struct _FV *prev; /* Prev view */ UINT32 base; /* Base address */ UINT32 size; /* Size in bytes */ UINT32 flags; /* Allocation flags */ UINT32 offset; /* Offset from start of mapped file */ FILE_MAPPING *mapping; /* File mapping */ BYTE protect; /* Protection for all pages at allocation time */ BYTE prot[1]; /* Protection byte for each page */ } FILE_VIEW; /* Per-page protection byte values */ #define VPROT_READ 0x01 #define VPROT_WRITE 0x02 #define VPROT_EXEC 0x04 #define VPROT_WRITECOPY 0x08 #define VPROT_GUARD 0x10 #define VPROT_NOCACHE 0x20 #define VPROT_COMMITTED 0x40 /* Per-view flags */ #define VFLAG_SYSTEM 0x01 /* Conversion from VPROT_* to Win32 flags */ static const BYTE VIRTUAL_Win32Flags[16] = { PAGE_NOACCESS, /* 0 */ PAGE_READONLY, /* READ */ PAGE_READWRITE, /* WRITE */ PAGE_READWRITE, /* READ | WRITE */ PAGE_EXECUTE, /* EXEC */ PAGE_EXECUTE_READ, /* READ | EXEC */ PAGE_EXECUTE_READWRITE, /* WRITE | EXEC */ PAGE_EXECUTE_READWRITE, /* READ | WRITE | EXEC */ PAGE_WRITECOPY, /* WRITECOPY */ PAGE_WRITECOPY, /* READ | WRITECOPY */ PAGE_WRITECOPY, /* WRITE | WRITECOPY */ PAGE_WRITECOPY, /* READ | WRITE | WRITECOPY */ PAGE_EXECUTE_WRITECOPY, /* EXEC | WRITECOPY */ PAGE_EXECUTE_WRITECOPY, /* READ | EXEC | WRITECOPY */ PAGE_EXECUTE_WRITECOPY, /* WRITE | EXEC | WRITECOPY */ PAGE_EXECUTE_WRITECOPY /* READ | WRITE | EXEC | WRITECOPY */ }; static FILE_VIEW *VIRTUAL_FirstView; static UINT32 page_shift; static UINT32 page_mask; static UINT32 granularity_mask; /* Allocation granularity (usually 64k) */ #define ROUND_ADDR(addr) \ ((UINT32)(addr) & ~page_mask) #define ROUND_SIZE(addr,size) \ (((UINT32)(size) + ((UINT32)(addr) & page_mask) + page_mask) & ~page_mask) static void VIRTUAL_DestroyMapping( K32OBJ *obj ); const K32OBJ_OPS MEM_MAPPED_FILE_Ops = { /* Object cannot be waited upon, so we don't need these (except destroy) */ NULL, /* signaled */ NULL, /* satisfied */ NULL, /* add_wait */ NULL, /* remove_wait */ VIRTUAL_DestroyMapping /* destroy */ }; /*********************************************************************** * VIRTUAL_GetProtStr */ static const char *VIRTUAL_GetProtStr( BYTE prot ) { static char buffer[6]; buffer[0] = (prot & VPROT_COMMITTED) ? 'c' : '-'; buffer[1] = (prot & VPROT_GUARD) ? 'g' : '-'; buffer[2] = (prot & VPROT_READ) ? 'r' : '-'; buffer[3] = (prot & VPROT_WRITE) ? ((prot & VPROT_WRITECOPY) ? 'w' : 'W') : '-'; buffer[4] = (prot & VPROT_EXEC) ? 'x' : '-'; buffer[5] = 0; return buffer; } /*********************************************************************** * VIRTUAL_DumpView */ static void VIRTUAL_DumpView( FILE_VIEW *view ) { UINT32 i, count; UINT32 addr = view->base; BYTE prot = view->prot[0]; dprintf_virtual( stddeb, "View: %08x - %08x%s", view->base, view->base + view->size - 1, (view->flags & VFLAG_SYSTEM) ? " (system)" : "" ); if (view->mapping && view->mapping->file) dprintf_virtual( stddeb, " %s @ %08x\n", view->mapping->file->unix_name, view->offset ); else dprintf_virtual( stddeb, " (anonymous)\n"); for (count = i = 1; i < view->size >> page_shift; i++, count++) { if (view->prot[i] == prot) continue; dprintf_virtual( stddeb, " %08x - %08x %s\n", addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) ); addr += (count << page_shift); prot = view->prot[i]; count = 0; } if (count) dprintf_virtual( stddeb, " %08x - %08x %s\n", addr, addr + (count << page_shift) - 1, VIRTUAL_GetProtStr(prot) ); } /*********************************************************************** * VIRTUAL_Dump */ void VIRTUAL_Dump(void) { FILE_VIEW *view = VIRTUAL_FirstView; dprintf_virtual( stddeb, "\nDump of all virtual memory views:\n\n" ); while (view) { VIRTUAL_DumpView( view ); view = view->next; } } /*********************************************************************** * VIRTUAL_FindView * * Find the view containing a given address. */ static FILE_VIEW *VIRTUAL_FindView( UINT32 addr ) { FILE_VIEW *view = VIRTUAL_FirstView; while (view) { if (view->base > addr) return NULL; if (view->base + view->size > addr) return view; view = view->next; } return NULL; } /*********************************************************************** * VIRTUAL_CreateView * * Create a new view and add it in the linked list. */ static FILE_VIEW *VIRTUAL_CreateView( UINT32 base, UINT32 size, UINT32 offset, UINT32 flags, BYTE vprot, FILE_MAPPING *mapping ) { FILE_VIEW *view, *prev; /* Create the view structure */ assert( !(base & page_mask) ); assert( !(size & page_mask) ); size >>= page_shift; if (!(view = (FILE_VIEW *)malloc( sizeof(*view) + size - 1 ))) return NULL; view->base = base; view->size = size << page_shift; view->flags = flags; view->offset = offset; view->mapping = mapping; view->protect = vprot; memset( view->prot, vprot, size ); /* Insert it in the linked list */ if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base)) { view->next = VIRTUAL_FirstView; view->prev = NULL; if (view->next) view->next->prev = view; VIRTUAL_FirstView = view; } else { prev = VIRTUAL_FirstView; while (prev->next && (prev->next->base < base)) prev = prev->next; view->next = prev->next; view->prev = prev; if (view->next) view->next->prev = view; prev->next = view; } if (debugging_virtual) VIRTUAL_DumpView( view ); return view; } /*********************************************************************** * VIRTUAL_DeleteView * * Delete an view. */ static void VIRTUAL_DeleteView( FILE_VIEW *view ) { FILE_munmap( (void *)view->base, 0, view->size ); if (view->next) view->next->prev = view->prev; if (view->prev) view->prev->next = view->next; else VIRTUAL_FirstView = view->next; if (view->mapping) K32OBJ_DecCount( &view->mapping->header ); free( view ); } /*********************************************************************** * VIRTUAL_GetUnixProt * * Convert page protections to protection for mmap/mprotect. */ static int VIRTUAL_GetUnixProt( BYTE vprot ) { int prot = 0; if ((vprot & VPROT_COMMITTED) && !(vprot & VPROT_GUARD)) { if (vprot & VPROT_READ) prot |= PROT_READ; if (vprot & VPROT_WRITE) prot |= PROT_WRITE; if (vprot & VPROT_EXEC) prot |= PROT_EXEC; } return prot; } /*********************************************************************** * VIRTUAL_GetWin32Prot * * Convert page protections to Win32 flags. */ static void VIRTUAL_GetWin32Prot( BYTE vprot, DWORD *protect, DWORD *state ) { if (protect) { *protect = VIRTUAL_Win32Flags[vprot & 0x0f]; if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD; if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE; } if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE; } /*********************************************************************** * VIRTUAL_GetProt * * Build page protections from Win32 flags. */ static BYTE VIRTUAL_GetProt( DWORD protect ) { BYTE vprot; switch(protect & 0xff) { case PAGE_READONLY: vprot = VPROT_READ; break; case PAGE_READWRITE: vprot = VPROT_READ | VPROT_WRITE; break; case PAGE_WRITECOPY: vprot = VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY; break; case PAGE_EXECUTE: vprot = VPROT_EXEC; break; case PAGE_EXECUTE_READ: vprot = VPROT_EXEC | VPROT_READ; break; case PAGE_EXECUTE_READWRITE: vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE | VPROT_WRITECOPY; break; case PAGE_EXECUTE_WRITECOPY: vprot = VPROT_EXEC | VPROT_READ | VPROT_WRITE; break; case PAGE_NOACCESS: default: vprot = 0; break; } if (protect & PAGE_GUARD) vprot |= VPROT_GUARD; if (protect & PAGE_NOCACHE) vprot |= VPROT_NOCACHE; return vprot; } /*********************************************************************** * VIRTUAL_SetProt * * Change the protection of a range of pages. */ static BOOL32 VIRTUAL_SetProt( FILE_VIEW *view, UINT32 base, UINT32 size, BYTE vprot ) { dprintf_virtual( stddeb, "VIRTUAL_SetProt: %08x-%08x %s\n", base, base + size - 1, VIRTUAL_GetProtStr( vprot ) ); if (mprotect( (void *)base, size, VIRTUAL_GetUnixProt(vprot) )) return FALSE; /* FIXME: last error */ memset( view->prot + ((base - view->base) >> page_shift), vprot, size >> page_shift ); if (debugging_virtual) VIRTUAL_DumpView( view ); return TRUE; } /*********************************************************************** * VIRTUAL_CheckFlags * * Check that all pages in a range have the given flags. */ static BOOL32 VIRTUAL_CheckFlags( UINT32 base, UINT32 size, BYTE flags ) { FILE_VIEW *view; UINT32 page; if (!size) return TRUE; if (!(view = VIRTUAL_FindView( base ))) return FALSE; if (view->base + view->size < base + size) return FALSE; page = (base - view->base) >> page_shift; size = ROUND_SIZE( base, size ) >> page_shift; while (size--) if ((view->prot[page++] & flags) != flags) return FALSE; return TRUE; } /*********************************************************************** * VIRTUAL_Init */ BOOL32 VIRTUAL_Init(void) { SYSTEM_INFO sysinfo; GetSystemInfo( &sysinfo ); page_mask = sysinfo.dwPageSize - 1; granularity_mask = sysinfo.dwAllocationGranularity - 1; /* Make sure we have a power of 2 */ assert( !(sysinfo.dwPageSize & page_mask) ); assert( !(sysinfo.dwAllocationGranularity & granularity_mask) ); page_shift = 0; while ((1 << page_shift) != sysinfo.dwPageSize) page_shift++; #ifdef linux { /* Do not use stdio here since it may temporarily change the size * of some segments (ie libc6 adds 0x1000 per open FILE) */ int fd = open ("/proc/self/maps", O_RDONLY); if (fd >= 0) { char buffer[80]; for (;;) { int start, end, offset; char r, w, x, p; BYTE vprot = VPROT_COMMITTED; char * ptr = buffer; int count = sizeof(buffer); while (1 == read(fd, ptr, 1) && *ptr != '\n' && --count > 0) ptr++; if (*ptr != '\n') break; *ptr = '\0'; sscanf( buffer, "%x-%x %c%c%c%c %x", &start, &end, &r, &w, &x, &p, &offset ); if (r == 'r') vprot |= VPROT_READ; if (w == 'w') vprot |= VPROT_WRITE; if (x == 'x') vprot |= VPROT_EXEC; if (p == 'p') vprot |= VPROT_WRITECOPY; VIRTUAL_CreateView( start, end - start, 0, VFLAG_SYSTEM, vprot, NULL ); } close (fd); } } #endif /* linux */ return TRUE; } /*********************************************************************** * VirtualAlloc (KERNEL32.548) */ LPVOID WINAPI VirtualAlloc( LPVOID addr, DWORD size, DWORD type, DWORD protect) { FILE_VIEW *view; UINT32 base, ptr, view_size; BYTE vprot; dprintf_virtual( stddeb, "VirtualAlloc: %08x %08lx %lx %08lx\n", (UINT32)addr, size, type, protect ); /* Round parameters to a page boundary */ if (size > 0x7fc00000) /* 2Gb - 4Mb */ { SetLastError( ERROR_OUTOFMEMORY ); return NULL; } if (addr) { if (type & MEM_RESERVE) /* Round down to 64k boundary */ base = ((UINT32)addr + granularity_mask) & ~granularity_mask; else base = ROUND_ADDR( addr ); size = (((UINT32)addr + size + page_mask) & ~page_mask) - base; if (base + size < base) /* Disallow wrap-around */ { SetLastError( ERROR_INVALID_PARAMETER ); return NULL; } } else { base = 0; size = (size + page_mask) & ~page_mask; } /* Compute the protection flags */ if (!(type & (MEM_COMMIT | MEM_RESERVE)) || (type & ~(MEM_COMMIT | MEM_RESERVE))) { SetLastError( ERROR_INVALID_PARAMETER ); return NULL; } if (type & MEM_COMMIT) vprot = VIRTUAL_GetProt( protect ) | VPROT_COMMITTED; else vprot = 0; /* Reserve the memory */ if ((type & MEM_RESERVE) || !base) { view_size = size + (base ? 0 : granularity_mask + 1); ptr = (UINT32)FILE_dommap( NULL, (LPVOID)base, 0, view_size, 0, 0, VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE ); if (ptr == (UINT32)-1) { SetLastError( ERROR_OUTOFMEMORY ); return NULL; } if (!base) { /* Release the extra memory while keeping the range */ /* starting on a 64k boundary. */ if (ptr & granularity_mask) { UINT32 extra = granularity_mask + 1 - (ptr & granularity_mask); FILE_munmap( (void *)ptr, 0, extra ); ptr += extra; view_size -= extra; } if (view_size > size) FILE_munmap( (void *)(ptr + size), 0, view_size - size ); } else if (ptr != base) { /* We couldn't get the address we wanted */ FILE_munmap( (void *)ptr, 0, view_size ); SetLastError( ERROR_INVALID_ADDRESS ); return NULL; } if (!(view = VIRTUAL_CreateView( ptr, size, 0, 0, vprot, NULL ))) { FILE_munmap( (void *)ptr, 0, size ); SetLastError( ERROR_OUTOFMEMORY ); return NULL; } if (debugging_virtual) VIRTUAL_DumpView( view ); return (LPVOID)ptr; } /* Commit the pages */ if (!(view = VIRTUAL_FindView( base )) || (base + size > view->base + view->size)) { SetLastError( ERROR_INVALID_PARAMETER ); return NULL; } if (!VIRTUAL_SetProt( view, base, size, vprot )) return NULL; return (LPVOID)base; } /*********************************************************************** * VirtualFree (KERNEL32.550) */ BOOL32 WINAPI VirtualFree( LPVOID addr, DWORD size, DWORD type ) { FILE_VIEW *view; UINT32 base; dprintf_virtual( stddeb, "VirtualFree: %08x %08lx %lx\n", (UINT32)addr, size, type ); /* Fix the parameters */ size = ROUND_SIZE( addr, size ); base = ROUND_ADDR( addr ); if (!(view = VIRTUAL_FindView( base )) || (base + size > view->base + view->size)) { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE; } /* Compute the protection flags */ if ((type != MEM_DECOMMIT) && (type != MEM_RELEASE)) { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE; } /* Free the pages */ if (type == MEM_RELEASE) { if (size || (base != view->base)) { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE; } VIRTUAL_DeleteView( view ); return TRUE; } /* Decommit the pages */ return VIRTUAL_SetProt( view, base, size, 0 ); } /*********************************************************************** * VirtualLock (KERNEL32.551) */ BOOL32 WINAPI VirtualLock( LPVOID addr, DWORD size ) { return TRUE; } /*********************************************************************** * VirtualUnlock (KERNEL32.556) */ BOOL32 WINAPI VirtualUnlock( LPVOID addr, DWORD size ) { return TRUE; } /*********************************************************************** * VirtualProtect (KERNEL32.552) */ BOOL32 WINAPI VirtualProtect( LPVOID addr, DWORD size, DWORD new_prot, LPDWORD old_prot ) { FILE_VIEW *view; UINT32 base, i; BYTE vprot, *p; dprintf_virtual( stddeb, "VirtualProtect: %08x %08lx %08lx\n", (UINT32)addr, size, new_prot ); /* Fix the parameters */ size = ROUND_SIZE( addr, size ); base = ROUND_ADDR( addr ); if (!(view = VIRTUAL_FindView( base )) || (base + size > view->base + view->size)) { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE; } /* Make sure all the pages are committed */ p = view->prot + ((base - view->base) >> page_shift); for (i = size >> page_shift; i; i--, p++) { if (!(*p & VPROT_COMMITTED)) { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE; } } VIRTUAL_GetWin32Prot( view->prot[0], old_prot, NULL ); vprot = VIRTUAL_GetProt( new_prot ) | VPROT_COMMITTED; return VIRTUAL_SetProt( view, base, size, vprot ); } /*********************************************************************** * VirtualProtectEx (KERNEL32.553) */ BOOL32 WINAPI VirtualProtectEx( HANDLE32 handle, LPVOID addr, DWORD size, DWORD new_prot, LPDWORD old_prot ) { BOOL32 ret = FALSE; PDB32 *pdb = PROCESS_GetPtr( handle, PROCESS_VM_OPERATION ); if (pdb) { if (pdb == PROCESS_Current()) ret = VirtualProtect( addr, size, new_prot, old_prot ); else fprintf(stderr,"Unsupported: VirtualProtectEx on other process\n"); K32OBJ_DecCount( &pdb->header ); } return ret; } /*********************************************************************** * VirtualQuery (KERNEL32.554) */ BOOL32 WINAPI VirtualQuery( LPCVOID addr, LPMEMORY_BASIC_INFORMATION info, DWORD len ) { FILE_VIEW *view = VIRTUAL_FirstView; UINT32 base = ROUND_ADDR( addr ); UINT32 alloc_base = 0; UINT32 size = 0; /* Find the view containing the address */ for (;;) { if (!view) { size = 0xffff0000 - alloc_base; break; } if (view->base > base) { size = view->base - alloc_base; view = NULL; break; } if (view->base + view->size > base) { alloc_base = view->base; size = view->size; break; } alloc_base = view->base + view->size; view = view->next; } /* Fill the info structure */ if (!view) { info->State = MEM_FREE; info->Protect = 0; info->AllocationProtect = 0; info->Type = 0; } else { BYTE vprot = view->prot[(base - alloc_base) >> page_shift]; VIRTUAL_GetWin32Prot( vprot, &info->Protect, &info->State ); for (size = base - alloc_base; size < view->size; size += page_mask+1) if (view->prot[size >> page_shift] != vprot) break; info->AllocationProtect = view->protect; info->Type = MEM_PRIVATE; /* FIXME */ } info->BaseAddress = (LPVOID)base; info->AllocationBase = (LPVOID)alloc_base; info->RegionSize = size - (base - alloc_base); return TRUE; } /*********************************************************************** * VirtualQueryEx (KERNEL32.555) */ BOOL32 WINAPI VirtualQueryEx( HANDLE32 handle, LPCVOID addr, LPMEMORY_BASIC_INFORMATION info, DWORD len ) { BOOL32 ret = FALSE; PDB32 *pdb = PROCESS_GetPtr( handle, PROCESS_QUERY_INFORMATION ); if (pdb) { if (pdb == PROCESS_Current()) ret = VirtualQuery( addr, info, len ); else fprintf(stderr,"Unsupported: VirtualQueryEx on other process\n"); K32OBJ_DecCount( &pdb->header ); } return ret; } /*********************************************************************** * IsBadReadPtr32 (KERNEL32.354) */ BOOL32 WINAPI IsBadReadPtr32( LPCVOID ptr, UINT32 size ) { return !VIRTUAL_CheckFlags( (UINT32)ptr, size, VPROT_READ | VPROT_COMMITTED ); } /*********************************************************************** * IsBadWritePtr32 (KERNEL32.357) */ BOOL32 WINAPI IsBadWritePtr32( LPVOID ptr, UINT32 size ) { return !VIRTUAL_CheckFlags( (UINT32)ptr, size, VPROT_WRITE | VPROT_COMMITTED ); } /*********************************************************************** * IsBadHugeReadPtr32 (KERNEL32.352) */ BOOL32 WINAPI IsBadHugeReadPtr32( LPCVOID ptr, UINT32 size ) { return IsBadReadPtr32( ptr, size ); } /*********************************************************************** * IsBadHugeWritePtr32 (KERNEL32.353) */ BOOL32 WINAPI IsBadHugeWritePtr32( LPVOID ptr, UINT32 size ) { return IsBadWritePtr32( ptr, size ); } /*********************************************************************** * IsBadCodePtr32 (KERNEL32.351) */ BOOL32 WINAPI IsBadCodePtr32( FARPROC32 ptr ) { return !VIRTUAL_CheckFlags( (UINT32)ptr, 1, VPROT_EXEC | VPROT_COMMITTED ); } /*********************************************************************** * IsBadStringPtr32A (KERNEL32.355) */ BOOL32 WINAPI IsBadStringPtr32A( LPCSTR str, UINT32 max ) { FILE_VIEW *view; UINT32 page, count; if (!max) return FALSE; if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE; page = ((UINT32)str - view->base) >> page_shift; count = page_mask + 1 - ((UINT32)str & page_mask); while (max) { if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) != (VPROT_READ | VPROT_COMMITTED)) return TRUE; if (count > max) count = max; max -= count; while (count--) if (!*str++) return FALSE; if (++page >= view->size >> page_shift) return TRUE; count = page_mask + 1; } return FALSE; } /*********************************************************************** * IsBadStringPtr32W (KERNEL32.356) */ BOOL32 WINAPI IsBadStringPtr32W( LPCWSTR str, UINT32 max ) { FILE_VIEW *view; UINT32 page, count; if (!max) return FALSE; if (!(view = VIRTUAL_FindView( (UINT32)str ))) return TRUE; page = ((UINT32)str - view->base) >> page_shift; count = (page_mask + 1 - ((UINT32)str & page_mask)) / sizeof(WCHAR); while (max) { if ((view->prot[page] & (VPROT_READ | VPROT_COMMITTED)) != (VPROT_READ | VPROT_COMMITTED)) return TRUE; if (count > max) count = max; max -= count; while (count--) if (!*str++) return FALSE; if (++page >= view->size >> page_shift) return TRUE; count = (page_mask + 1) / sizeof(WCHAR); } return FALSE; } /*********************************************************************** * CreateFileMapping32A (KERNEL32.46) */ HANDLE32 WINAPI CreateFileMapping32A(HFILE32 hFile, LPSECURITY_ATTRIBUTES attr, DWORD protect, DWORD size_high, DWORD size_low, LPCSTR name ) { FILE_MAPPING *mapping = NULL; HANDLE32 handle; BYTE vprot; /* First search for an object with the same name */ K32OBJ *obj = K32OBJ_FindName( name ); if (obj) { if (obj->type == K32OBJ_MEM_MAPPED_FILE) { SetLastError( ERROR_ALREADY_EXISTS ); handle = HANDLE_Alloc( obj, FILE_MAP_ALL_ACCESS /*FIXME*/, FALSE ); } else { SetLastError( ERROR_DUP_NAME ); handle = 0; } K32OBJ_DecCount( obj ); return handle; } /* Check parameters */ dprintf_virtual(stddeb,"CreateFileMapping32A(%x,%p,%08lx,%08lx%08lx,%s)\n", hFile, attr, protect, size_high, size_low, name ); vprot = VIRTUAL_GetProt( protect ); if (protect & SEC_RESERVE) { if (hFile != INVALID_HANDLE_VALUE32) { SetLastError( ERROR_INVALID_PARAMETER ); return 0; } } else vprot |= VPROT_COMMITTED; if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE; /* Compute the size and extend the file if necessary */ if (hFile == INVALID_HANDLE_VALUE32) { if (!size_high && !size_low) { SetLastError( ERROR_INVALID_PARAMETER ); return 0; } obj = NULL; } else /* We have a file */ { BY_HANDLE_FILE_INFORMATION info; DWORD access = GENERIC_READ; if (((protect & 0xff) == PAGE_READWRITE) || ((protect & 0xff) == PAGE_WRITECOPY) || ((protect & 0xff) == PAGE_EXECUTE_READWRITE) || ((protect & 0xff) == PAGE_EXECUTE_WRITECOPY)) access |= GENERIC_WRITE; if (!(obj = HANDLE_GetObjPtr( hFile, K32OBJ_FILE, access ))) goto error; if (!GetFileInformationByHandle( hFile, &info )) goto error; if (!size_high && !size_low) { size_high = info.nFileSizeHigh; size_low = info.nFileSizeLow; } else if ((size_high > info.nFileSizeHigh) || ((size_high == info.nFileSizeHigh) && (size_low > info.nFileSizeLow))) { /* We have to grow the file */ if (SetFilePointer( hFile, size_low, &size_high, FILE_BEGIN ) == 0xffffffff) goto error; if (!SetEndOfFile( hFile )) goto error; } } /* Allocate the mapping object */ if (!(mapping = HeapAlloc( SystemHeap, 0, sizeof(*mapping) ))) goto error; mapping->header.type = K32OBJ_MEM_MAPPED_FILE; mapping->header.refcount = 1; mapping->protect = vprot; mapping->size_high = size_high; mapping->size_low = ROUND_SIZE( 0, size_low ); mapping->file = (FILE_OBJECT *)obj; if (!K32OBJ_AddName( &mapping->header, name )) handle = 0; else handle = HANDLE_Alloc( &mapping->header, FILE_MAP_ALL_ACCESS /*FIXME*/, FALSE ); K32OBJ_DecCount( &mapping->header ); return handle; error: if (obj) K32OBJ_DecCount( obj ); if (mapping) HeapFree( SystemHeap, 0, mapping ); return 0; } /*********************************************************************** * CreateFileMapping32W (KERNEL32.47) */ HANDLE32 WINAPI CreateFileMapping32W(HFILE32 hFile, LPSECURITY_ATTRIBUTES attr, DWORD protect, DWORD size_high, DWORD size_low, LPCWSTR name ) { LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name ); HANDLE32 ret = CreateFileMapping32A( hFile, attr, protect, size_high, size_low, nameA ); HeapFree( GetProcessHeap(), 0, nameA ); return ret; } /*********************************************************************** * OpenFileMapping32A (KERNEL32.397) */ HANDLE32 WINAPI OpenFileMapping32A( DWORD access, BOOL32 inherit, LPCSTR name ) { HANDLE32 handle = 0; K32OBJ *obj; SYSTEM_LOCK(); if ((obj = K32OBJ_FindNameType( name, K32OBJ_MEM_MAPPED_FILE ))) { handle = HANDLE_Alloc( obj, access, inherit ); K32OBJ_DecCount( obj ); } SYSTEM_UNLOCK(); return handle; } /*********************************************************************** * OpenFileMapping32W (KERNEL32.398) */ HANDLE32 WINAPI OpenFileMapping32W( DWORD access, BOOL32 inherit, LPCWSTR name) { LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name ); HANDLE32 ret = OpenFileMapping32A( access, inherit, nameA ); HeapFree( GetProcessHeap(), 0, nameA ); return ret; } /*********************************************************************** * VIRTUAL_DestroyMapping * * Destroy a FILE_MAPPING object. */ static void VIRTUAL_DestroyMapping( K32OBJ *ptr ) { FILE_MAPPING *mapping = (FILE_MAPPING *)ptr; assert( ptr->type == K32OBJ_MEM_MAPPED_FILE ); if (mapping->file) K32OBJ_DecCount( &mapping->file->header ); ptr->type = K32OBJ_UNKNOWN; HeapFree( SystemHeap, 0, mapping ); } /*********************************************************************** * MapViewOfFile (KERNEL32.385) */ LPVOID WINAPI MapViewOfFile( HANDLE32 mapping, DWORD access, DWORD offset_high, DWORD offset_low, DWORD count ) { return MapViewOfFileEx( mapping, access, offset_high, offset_low, count, NULL ); } /*********************************************************************** * MapViewOfFileEx (KERNEL32.386) */ LPVOID WINAPI MapViewOfFileEx(HANDLE32 handle, DWORD access, DWORD offset_high, DWORD offset_low, DWORD count, LPVOID addr ) { FILE_MAPPING *mapping; FILE_VIEW *view; UINT32 ptr = (UINT32)-1, size = 0; int flags = MAP_PRIVATE; /* Check parameters */ if ((offset_low & granularity_mask) || (addr && ((UINT32)addr & granularity_mask))) { SetLastError( ERROR_INVALID_PARAMETER ); return NULL; } if (!(mapping = (FILE_MAPPING *)HANDLE_GetObjPtr( handle, K32OBJ_MEM_MAPPED_FILE, 0 /* FIXME */ ))) return NULL; if (mapping->size_high || offset_high) fprintf( stderr, "MapViewOfFileEx: offsets larger than 4Gb not supported\n"); if ((offset_low >= mapping->size_low) || (count > mapping->size_low - offset_low)) { SetLastError( ERROR_INVALID_PARAMETER ); goto error; } if (count) size = ROUND_SIZE( offset_low, count ); else size = mapping->size_low - offset_low; switch(access) { case FILE_MAP_ALL_ACCESS: case FILE_MAP_WRITE: case FILE_MAP_WRITE | FILE_MAP_READ: if (!(mapping->protect & VPROT_WRITE)) { SetLastError( ERROR_INVALID_PARAMETER ); goto error; } flags = MAP_SHARED; /* fall through */ case FILE_MAP_READ: case FILE_MAP_COPY: case FILE_MAP_COPY | FILE_MAP_READ: if (mapping->protect & VPROT_READ) break; /* fall through */ default: SetLastError( ERROR_INVALID_PARAMETER ); goto error; } /* Map the file */ dprintf_virtual( stddeb, "MapViewOfFile: handle=%x size=%x offset=%lx\n", handle, size, offset_low ); ptr = (UINT32)FILE_dommap( mapping->file, addr, 0, size, 0, offset_low, VIRTUAL_GetUnixProt( mapping->protect ), flags ); if (ptr == (UINT32)-1) { SetLastError( ERROR_OUTOFMEMORY ); goto error; } if (!(view = VIRTUAL_CreateView( ptr, size, offset_low, 0, mapping->protect, mapping ))) { SetLastError( ERROR_OUTOFMEMORY ); goto error; } return (LPVOID)ptr; error: if (ptr != (UINT32)-1) FILE_munmap( (void *)ptr, 0, size ); K32OBJ_DecCount( &mapping->header ); return NULL; } /*********************************************************************** * FlushViewOfFile (KERNEL32.262) */ BOOL32 WINAPI FlushViewOfFile( LPCVOID base, DWORD cbFlush ) { FILE_VIEW *view; UINT32 addr = ROUND_ADDR( base ); dprintf_virtual( stddeb, "FlushViewOfFile at %p for %ld bytes\n", base, cbFlush ); if (!(view = VIRTUAL_FindView( addr ))) { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE; } if (!cbFlush) cbFlush = view->size; if (!msync( (void *)addr, cbFlush, MS_SYNC )) return TRUE; SetLastError( ERROR_INVALID_PARAMETER ); return FALSE; } /*********************************************************************** * UnmapViewOfFile (KERNEL32.540) */ BOOL32 WINAPI UnmapViewOfFile( LPVOID addr ) { FILE_VIEW *view; UINT32 base = ROUND_ADDR( addr ); if (!(view = VIRTUAL_FindView( base )) || (base != view->base)) { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE; } VIRTUAL_DeleteView( view ); return TRUE; }