/* * Win32 virtual memory functions * * Copyright 1997 Alexandre Julliard */ #include #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 "global.h" #include "server.h" #include "debugtools.h" DEFAULT_DEBUG_CHANNEL(virtual) #ifndef MS_SYNC #define MS_SYNC 0 #endif /* File view */ typedef struct _FV { struct _FV *next; /* Next view */ struct _FV *prev; /* Prev view */ UINT base; /* Base address */ UINT size; /* Size in bytes */ UINT flags; /* Allocation flags */ UINT offset; /* Offset from start of mapped file */ HANDLE mapping; /* Handle to the file mapping */ HANDLERPROC handlerProc; /* Fault handler */ LPVOID handlerArg; /* Fault handler argument */ BYTE protect; /* Protection for all pages at allocation time */ BYTE prot[1]; /* Protection byte for each page */ } FILE_VIEW; /* 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; #ifdef __i386__ /* These are always the same on an i386, and it will be faster this way */ # define page_mask 0xfff # define page_shift 12 # define granularity_mask 0xffff #else static UINT page_shift; static UINT page_mask; static UINT granularity_mask; /* Allocation granularity (usually 64k) */ #endif /* __i386__ */ #define ROUND_ADDR(addr) \ ((UINT)(addr) & ~page_mask) #define ROUND_SIZE(addr,size) \ (((UINT)(size) + ((UINT)(addr) & page_mask) + page_mask) & ~page_mask) #define VIRTUAL_DEBUG_DUMP_VIEW(view) \ if (!TRACE_ON(virtual)); else VIRTUAL_DumpView(view) /*********************************************************************** * 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 ) { UINT i, count; UINT addr = view->base; BYTE prot = view->prot[0]; DPRINTF( "View: %08x - %08x%s", view->base, view->base + view->size - 1, (view->flags & VFLAG_SYSTEM) ? " (system)" : "" ); if (view->mapping) DPRINTF( " %d @ %08x\n", view->mapping, view->offset ); else DPRINTF( " (anonymous)\n"); for (count = i = 1; i < view->size >> page_shift; i++, count++) { if (view->prot[i] == prot) continue; DPRINTF( " %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( " %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( "\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. * * RETURNS * View: Success * NULL: Failure */ static FILE_VIEW *VIRTUAL_FindView( UINT addr /* [in] Address */ ) { 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( UINT base, UINT size, UINT offset, UINT flags, BYTE vprot, HANDLE 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; view->handlerProc = NULL; memset( view->prot, vprot, size ); /* Duplicate the mapping handle */ if ((view->mapping != -1) && !DuplicateHandle( GetCurrentProcess(), view->mapping, GetCurrentProcess(), &view->mapping, 0, FALSE, DUPLICATE_SAME_ACCESS )) { free( view ); return NULL; } /* 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; } VIRTUAL_DEBUG_DUMP_VIEW( view ); return view; } /*********************************************************************** * VIRTUAL_DeleteView * Deletes a view. * * RETURNS * None */ static void VIRTUAL_DeleteView( FILE_VIEW *view /* [in] 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) CloseHandle( view->mapping ); 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. * * RETURNS * None */ static void VIRTUAL_GetWin32Prot( BYTE vprot, /* [in] Page protection flags */ DWORD *protect, /* [out] Location to store Win32 protection flags */ DWORD *state /* [out] Location to store mem state flag */ ) { if (protect) { *protect = VIRTUAL_Win32Flags[vprot & 0x0f]; /* if (vprot & VPROT_GUARD) *protect |= PAGE_GUARD;*/ if (vprot & VPROT_NOCACHE) *protect |= PAGE_NOCACHE; if (vprot & VPROT_GUARD) *protect = PAGE_NOACCESS; } if (state) *state = (vprot & VPROT_COMMITTED) ? MEM_COMMIT : MEM_RESERVE; } /*********************************************************************** * VIRTUAL_GetProt * * Build page protections from Win32 flags. * * RETURNS * Value of page protection flags */ static BYTE VIRTUAL_GetProt( DWORD protect /* [in] Win32 protection flags */ ) { 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. * * RETURNS * TRUE: Success * FALSE: Failure */ static BOOL VIRTUAL_SetProt( FILE_VIEW *view, /* [in] Pointer to view */ UINT base, /* [in] Starting address */ UINT size, /* [in] Size in bytes */ BYTE vprot /* [in] Protections to use */ ) { TRACE("%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 ); VIRTUAL_DEBUG_DUMP_VIEW( view ); return TRUE; } /*********************************************************************** * VIRTUAL_CheckFlags * * Check that all pages in a range have the given flags. * * RETURNS * TRUE: They do * FALSE: They do not */ static BOOL VIRTUAL_CheckFlags( UINT base, /* [in] Starting address */ UINT size, /* [in] Size in bytes */ BYTE flags /* [in] Flags to check for */ ) { FILE_VIEW *view; UINT 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 */ BOOL VIRTUAL_Init(void) { #ifndef __i386__ DWORD page_size; # ifdef HAVE_GETPAGESIZE page_size = getpagesize(); # else # ifdef __svr4__ page_size = sysconf(_SC_PAGESIZE); # else # error Cannot get the page size on this platform # endif # endif page_mask = page_size - 1; granularity_mask = 0xffff; /* hard-coded for now */ /* Make sure we have a power of 2 */ assert( !(page_size & page_mask) ); page_shift = 0; while ((1 << page_shift) != page_size) page_shift++; #endif /* !__i386__ */ #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[512]; /* line might be rather long in 2.1 */ 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, -1 ); } close (fd); } } #endif /* linux */ return TRUE; } /*********************************************************************** * VIRTUAL_GetPageSize */ DWORD VIRTUAL_GetPageSize(void) { return 1 << page_shift; } /*********************************************************************** * VIRTUAL_GetGranularity */ DWORD VIRTUAL_GetGranularity(void) { return granularity_mask + 1; } /*********************************************************************** * VIRTUAL_SetFaultHandler */ BOOL VIRTUAL_SetFaultHandler( LPCVOID addr, HANDLERPROC proc, LPVOID arg ) { FILE_VIEW *view; if (!(view = VIRTUAL_FindView((UINT)addr))) return FALSE; view->handlerProc = proc; view->handlerArg = arg; return TRUE; } /*********************************************************************** * VIRTUAL_HandleFault */ BOOL VIRTUAL_HandleFault( LPCVOID addr ) { FILE_VIEW *view = VIRTUAL_FindView((UINT)addr); if (view && view->handlerProc) return view->handlerProc(view->handlerArg, addr); return FALSE; } /*********************************************************************** * VirtualAlloc (KERNEL32.548) * Reserves or commits a region of pages in virtual address space * * RETURNS * Base address of allocated region of pages * NULL: Failure */ LPVOID WINAPI VirtualAlloc( LPVOID addr, /* [in] Address of region to reserve or commit */ DWORD size, /* [in] Size of region */ DWORD type, /* [in] Type of allocation */ DWORD protect /* [in] Type of access protection */ ) { FILE_VIEW *view; UINT base, ptr, view_size; BYTE vprot; TRACE("%08x %08lx %lx %08lx\n", (UINT)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 = ((UINT)addr + granularity_mask) & ~granularity_mask; else base = ROUND_ADDR( addr ); size = (((UINT)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; } if (type & MEM_TOP_DOWN) { /* FIXME: MEM_TOP_DOWN allocates the largest possible address. * Is there _ANY_ way to do it with UNIX mmap()? */ WARN("MEM_TOP_DOWN ignored\n"); type &= ~MEM_TOP_DOWN; } /* 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 = (UINT)FILE_dommap( -1, (LPVOID)base, 0, view_size, 0, 0, VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE ); if (ptr == (UINT)-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) { UINT 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, -1 ))) { FILE_munmap( (void *)ptr, 0, size ); SetLastError( ERROR_OUTOFMEMORY ); return NULL; } VIRTUAL_DEBUG_DUMP_VIEW( 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) * Release or decommits a region of pages in virtual address space. * * RETURNS * TRUE: Success * FALSE: Failure */ BOOL WINAPI VirtualFree( LPVOID addr, /* [in] Address of region of committed pages */ DWORD size, /* [in] Size of region */ DWORD type /* [in] Type of operation */ ) { FILE_VIEW *view; UINT base; TRACE("%08x %08lx %lx\n", (UINT)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) * Locks the specified region of virtual address space * * NOTE * Always returns TRUE * * RETURNS * TRUE: Success * FALSE: Failure */ BOOL WINAPI VirtualLock( LPVOID addr, /* [in] Address of first byte of range to lock */ DWORD size /* [in] Number of bytes in range to lock */ ) { return TRUE; } /*********************************************************************** * VirtualUnlock (KERNEL32.556) * Unlocks a range of pages in the virtual address space * * NOTE * Always returns TRUE * * RETURNS * TRUE: Success * FALSE: Failure */ BOOL WINAPI VirtualUnlock( LPVOID addr, /* [in] Address of first byte of range */ DWORD size /* [in] Number of bytes in range */ ) { return TRUE; } /*********************************************************************** * VirtualProtect (KERNEL32.552) * Changes the access protection on a region of committed pages * * RETURNS * TRUE: Success * FALSE: Failure */ BOOL WINAPI VirtualProtect( LPVOID addr, /* [in] Address of region of committed pages */ DWORD size, /* [in] Size of region */ DWORD new_prot, /* [in] Desired access protection */ LPDWORD old_prot /* [out] Address of variable to get old protection */ ) { FILE_VIEW *view; UINT base, i; BYTE vprot, *p; TRACE("%08x %08lx %08lx\n", (UINT)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) * Changes the access protection on a region of committed pages in the * virtual address space of a specified process * * RETURNS * TRUE: Success * FALSE: Failure */ BOOL WINAPI VirtualProtectEx( HANDLE handle, /* [in] Handle of process */ LPVOID addr, /* [in] Address of region of committed pages */ DWORD size, /* [in] Size of region */ DWORD new_prot, /* [in] Desired access protection */ LPDWORD old_prot /* [out] Address of variable to get old protection */ ) { if (PROCESS_IsCurrent( handle )) return VirtualProtect( addr, size, new_prot, old_prot ); ERR("Unsupported on other process\n"); return FALSE; } /*********************************************************************** * VirtualQuery (KERNEL32.554) * Provides info about a range of pages in virtual address space * * RETURNS * Number of bytes returned in information buffer */ DWORD WINAPI VirtualQuery( LPCVOID addr, /* [in] Address of region */ LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */ DWORD len /* [in] Size of buffer */ ) { FILE_VIEW *view = VIRTUAL_FirstView; UINT base = ROUND_ADDR( addr ); UINT alloc_base = 0; UINT 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 sizeof(*info); } /*********************************************************************** * VirtualQueryEx (KERNEL32.555) * Provides info about a range of pages in virtual address space of a * specified process * * RETURNS * Number of bytes returned in information buffer */ DWORD WINAPI VirtualQueryEx( HANDLE handle, /* [in] Handle of process */ LPCVOID addr, /* [in] Address of region */ LPMEMORY_BASIC_INFORMATION info, /* [out] Address of info buffer */ DWORD len /* [in] Size of buffer */ ) { if (PROCESS_IsCurrent( handle )) return VirtualQuery( addr, info, len ); ERR("Unsupported on other process\n"); return 0; } /*********************************************************************** * IsBadReadPtr32 (KERNEL32.354) * * RETURNS * FALSE: Process has read access to entire block * TRUE: Otherwise */ BOOL WINAPI IsBadReadPtr( LPCVOID ptr, /* Address of memory block */ UINT size /* Size of block */ ) { return !VIRTUAL_CheckFlags( (UINT)ptr, size, VPROT_READ | VPROT_COMMITTED ); } /*********************************************************************** * IsBadWritePtr32 (KERNEL32.357) * * RETURNS * FALSE: Process has write access to entire block * TRUE: Otherwise */ BOOL WINAPI IsBadWritePtr( LPVOID ptr, /* [in] Address of memory block */ UINT size /* [in] Size of block in bytes */ ) { return !VIRTUAL_CheckFlags( (UINT)ptr, size, VPROT_WRITE | VPROT_COMMITTED ); } /*********************************************************************** * IsBadHugeReadPtr32 (KERNEL32.352) * RETURNS * FALSE: Process has read access to entire block * TRUE: Otherwise */ BOOL WINAPI IsBadHugeReadPtr( LPCVOID ptr, /* [in] Address of memory block */ UINT size /* [in] Size of block */ ) { return IsBadReadPtr( ptr, size ); } /*********************************************************************** * IsBadHugeWritePtr32 (KERNEL32.353) * RETURNS * FALSE: Process has write access to entire block * TRUE: Otherwise */ BOOL WINAPI IsBadHugeWritePtr( LPVOID ptr, /* [in] Address of memory block */ UINT size /* [in] Size of block */ ) { return IsBadWritePtr( ptr, size ); } /*********************************************************************** * IsBadCodePtr32 (KERNEL32.351) * * RETURNS * FALSE: Process has read access to specified memory * TRUE: Otherwise */ BOOL WINAPI IsBadCodePtr( FARPROC ptr /* [in] Address of function */ ) { return !VIRTUAL_CheckFlags( (UINT)ptr, 1, VPROT_EXEC | VPROT_COMMITTED ); } /*********************************************************************** * IsBadStringPtr32A (KERNEL32.355) * * RETURNS * FALSE: Read access to all bytes in string * TRUE: Else */ BOOL WINAPI IsBadStringPtrA( LPCSTR str, /* [in] Address of string */ UINT max /* [in] Maximum size of string */ ) { FILE_VIEW *view; UINT page, count; if (!max) return FALSE; if (!(view = VIRTUAL_FindView( (UINT)str ))) return TRUE; page = ((UINT)str - view->base) >> page_shift; count = page_mask + 1 - ((UINT)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) * See IsBadStringPtr32A */ BOOL WINAPI IsBadStringPtrW( LPCWSTR str, UINT max ) { FILE_VIEW *view; UINT page, count; if (!max) return FALSE; if (!(view = VIRTUAL_FindView( (UINT)str ))) return TRUE; page = ((UINT)str - view->base) >> page_shift; count = (page_mask + 1 - ((UINT)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) * Creates a named or unnamed file-mapping object for the specified file * * RETURNS * Handle: Success * 0: Mapping object does not exist * NULL: Failure */ HANDLE WINAPI CreateFileMappingA( HFILE hFile, /* [in] Handle of file to map */ SECURITY_ATTRIBUTES *sa, /* [in] Optional security attributes*/ DWORD protect, /* [in] Protection for mapping object */ DWORD size_high, /* [in] High-order 32 bits of object size */ DWORD size_low, /* [in] Low-order 32 bits of object size */ LPCSTR name /* [in] Name of file-mapping object */ ) { struct create_mapping_request *req = get_req_buffer(); BYTE vprot; /* Check parameters */ TRACE("(%x,%p,%08lx,%08lx%08lx,%s)\n", hFile, sa, protect, size_high, size_low, debugstr_a(name) ); vprot = VIRTUAL_GetProt( protect ); if (protect & SEC_RESERVE) { if (hFile != INVALID_HANDLE_VALUE) { SetLastError( ERROR_INVALID_PARAMETER ); return 0; } } else vprot |= VPROT_COMMITTED; if (protect & SEC_NOCACHE) vprot |= VPROT_NOCACHE; /* Create the server object */ req->file_handle = hFile; req->size_high = size_high; req->size_low = size_low; req->protect = vprot; req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle); lstrcpynA( req->name, name ? name : "", server_remaining(req->name) ); SetLastError(0); server_call( REQ_CREATE_MAPPING ); if (req->handle == -1) return 0; return req->handle; } /*********************************************************************** * CreateFileMapping32W (KERNEL32.47) * See CreateFileMapping32A */ HANDLE WINAPI CreateFileMappingW( HFILE hFile, LPSECURITY_ATTRIBUTES attr, DWORD protect, DWORD size_high, DWORD size_low, LPCWSTR name ) { LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name ); HANDLE ret = CreateFileMappingA( hFile, attr, protect, size_high, size_low, nameA ); HeapFree( GetProcessHeap(), 0, nameA ); return ret; } /*********************************************************************** * OpenFileMapping32A (KERNEL32.397) * Opens a named file-mapping object. * * RETURNS * Handle: Success * NULL: Failure */ HANDLE WINAPI OpenFileMappingA( DWORD access, /* [in] Access mode */ BOOL inherit, /* [in] Inherit flag */ LPCSTR name ) /* [in] Name of file-mapping object */ { struct open_mapping_request *req = get_req_buffer(); req->access = access; req->inherit = inherit; lstrcpynA( req->name, name ? name : "", server_remaining(req->name) ); server_call( REQ_OPEN_MAPPING ); if (req->handle == -1) return 0; /* must return 0 on failure, not -1 */ return req->handle; } /*********************************************************************** * OpenFileMapping32W (KERNEL32.398) * See OpenFileMapping32A */ HANDLE WINAPI OpenFileMappingW( DWORD access, BOOL inherit, LPCWSTR name) { LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name ); HANDLE ret = OpenFileMappingA( access, inherit, nameA ); HeapFree( GetProcessHeap(), 0, nameA ); return ret; } /*********************************************************************** * MapViewOfFile (KERNEL32.385) * Maps a view of a file into the address space * * RETURNS * Starting address of mapped view * NULL: Failure */ LPVOID WINAPI MapViewOfFile( HANDLE mapping, /* [in] File-mapping object to map */ DWORD access, /* [in] Access mode */ DWORD offset_high, /* [in] High-order 32 bits of file offset */ DWORD offset_low, /* [in] Low-order 32 bits of file offset */ DWORD count /* [in] Number of bytes to map */ ) { return MapViewOfFileEx( mapping, access, offset_high, offset_low, count, NULL ); } /*********************************************************************** * MapViewOfFileEx (KERNEL32.386) * Maps a view of a file into the address space * * RETURNS * Starting address of mapped view * NULL: Failure */ LPVOID WINAPI MapViewOfFileEx( HANDLE handle, /* [in] File-mapping object to map */ DWORD access, /* [in] Access mode */ DWORD offset_high, /* [in] High-order 32 bits of file offset */ DWORD offset_low, /* [in] Low-order 32 bits of file offset */ DWORD count, /* [in] Number of bytes to map */ LPVOID addr /* [in] Suggested starting address for mapped view */ ) { FILE_VIEW *view; UINT ptr = (UINT)-1, size = 0; int flags = MAP_PRIVATE; int unix_handle = -1; int prot; struct get_mapping_info_request *req = get_req_buffer(); /* Check parameters */ if ((offset_low & granularity_mask) || (addr && ((UINT)addr & granularity_mask))) { SetLastError( ERROR_INVALID_PARAMETER ); return NULL; } req->handle = handle; if (server_call_fd( REQ_GET_MAPPING_INFO, -1, &unix_handle )) goto error; if (req->size_high || offset_high) ERR("Offsets larger than 4Gb not supported\n"); if ((offset_low >= req->size_low) || (count > req->size_low - offset_low)) { SetLastError( ERROR_INVALID_PARAMETER ); goto error; } if (count) size = ROUND_SIZE( offset_low, count ); else size = req->size_low - offset_low; prot = req->protect; switch(access) { case FILE_MAP_ALL_ACCESS: case FILE_MAP_WRITE: case FILE_MAP_WRITE | FILE_MAP_READ: if (!(prot & 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 (prot & VPROT_READ) break; /* fall through */ default: SetLastError( ERROR_INVALID_PARAMETER ); goto error; } /* Map the file */ TRACE("handle=%x size=%x offset=%lx\n", handle, size, offset_low ); ptr = (UINT)FILE_dommap( unix_handle, addr, 0, size, 0, offset_low, VIRTUAL_GetUnixProt( prot ), flags ); if (ptr == (UINT)-1) { /* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and * Platform Differences": * Windows NT: ERROR_INVALID_PARAMETER * Windows 95: ERROR_INVALID_ADDRESS. * FIXME: So should we add a module dependend check here? -MM */ if (errno==ENOMEM) SetLastError( ERROR_OUTOFMEMORY ); else SetLastError( ERROR_INVALID_PARAMETER ); goto error; } if (!(view = VIRTUAL_CreateView( ptr, size, offset_low, 0, prot, handle ))) { SetLastError( ERROR_OUTOFMEMORY ); goto error; } if (unix_handle != -1) close( unix_handle ); return (LPVOID)ptr; error: if (unix_handle != -1) close( unix_handle ); if (ptr != (UINT)-1) FILE_munmap( (void *)ptr, 0, size ); return NULL; } /*********************************************************************** * FlushViewOfFile (KERNEL32.262) * Writes to the disk a byte range within a mapped view of a file * * RETURNS * TRUE: Success * FALSE: Failure */ BOOL WINAPI FlushViewOfFile( LPCVOID base, /* [in] Start address of byte range to flush */ DWORD cbFlush /* [in] Number of bytes in range */ ) { FILE_VIEW *view; UINT addr = ROUND_ADDR( base ); TRACE("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) * Unmaps a mapped view of a file. * * NOTES * Should addr be an LPCVOID? * * RETURNS * TRUE: Success * FALSE: Failure */ BOOL WINAPI UnmapViewOfFile( LPVOID addr /* [in] Address where mapped view begins */ ) { FILE_VIEW *view; UINT base = ROUND_ADDR( addr ); if (!(view = VIRTUAL_FindView( base )) || (base != view->base)) { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE; } VIRTUAL_DeleteView( view ); return TRUE; } /*********************************************************************** * VIRTUAL_MapFileW * * Helper function to map a file to memory: * name - file name * [RETURN] ptr - pointer to mapped file */ LPVOID VIRTUAL_MapFileW( LPCWSTR name ) { HANDLE hFile, hMapping; LPVOID ptr = NULL; hFile = CreateFileW( name, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, 0); if (hFile != INVALID_HANDLE_VALUE) { hMapping = CreateFileMappingA( hFile, NULL, PAGE_READONLY, 0, 0, NULL ); CloseHandle( hFile ); if (hMapping) { ptr = MapViewOfFile( hMapping, FILE_MAP_READ, 0, 0, 0 ); CloseHandle( hMapping ); } } return ptr; }