//go:cgo_import_dynamic runtime._GetProcessAffinityMask GetProcessAffinityMask%3 "kernel32.dll"
//go:cgo_import_dynamic runtime._GetQueuedCompletionStatus GetQueuedCompletionStatus%5 "kernel32.dll"
//go:cgo_import_dynamic runtime._GetStdHandle GetStdHandle%1 "kernel32.dll"
+//go:cgo_import_dynamic runtime._GetSystemDirectoryA GetSystemDirectoryA%2 "kernel32.dll"
//go:cgo_import_dynamic runtime._GetSystemInfo GetSystemInfo%1 "kernel32.dll"
//go:cgo_import_dynamic runtime._GetThreadContext GetThreadContext%2 "kernel32.dll"
//go:cgo_import_dynamic runtime._LoadLibraryW LoadLibraryW%1 "kernel32.dll"
//go:cgo_import_dynamic runtime._VirtualAlloc VirtualAlloc%4 "kernel32.dll"
//go:cgo_import_dynamic runtime._VirtualFree VirtualFree%3 "kernel32.dll"
//go:cgo_import_dynamic runtime._VirtualQuery VirtualQuery%3 "kernel32.dll"
-//go:cgo_import_dynamic runtime._WSAGetOverlappedResult WSAGetOverlappedResult%5 "ws2_32.dll"
//go:cgo_import_dynamic runtime._WaitForSingleObject WaitForSingleObject%2 "kernel32.dll"
//go:cgo_import_dynamic runtime._WriteConsoleW WriteConsoleW%5 "kernel32.dll"
//go:cgo_import_dynamic runtime._WriteFile WriteFile%5 "kernel32.dll"
-//go:cgo_import_dynamic runtime._timeBeginPeriod timeBeginPeriod%1 "winmm.dll"
-//go:cgo_import_dynamic runtime._timeEndPeriod timeEndPeriod%1 "winmm.dll"
type stdFunction unsafe.Pointer
_GetProcessAffinityMask,
_GetQueuedCompletionStatus,
_GetStdHandle,
+ _GetSystemDirectoryA,
_GetSystemInfo,
_GetSystemTimeAsFileTime,
_GetThreadContext,
_VirtualAlloc,
_VirtualFree,
_VirtualQuery,
- _WSAGetOverlappedResult,
_WaitForSingleObject,
_WriteConsoleW,
_WriteFile,
- _timeBeginPeriod,
- _timeEndPeriod,
_ stdFunction
// Following syscalls are only available on some Windows PCs.
_AddDllDirectory,
_AddVectoredContinueHandler,
_GetQueuedCompletionStatusEx,
+ _LoadLibraryExA,
_LoadLibraryExW,
_ stdFunction
// links wrong printf function to cgo executable (see issue
// 12030 for details).
_NtWaitForSingleObject stdFunction
+
+ // These are from non-kernel32.dll, so we prefer to LoadLibraryEx them.
+ _timeBeginPeriod,
+ _timeEndPeriod,
+ _WSAGetOverlappedResult,
+ _ stdFunction
)
// Function to be called by windows CreateThread
return stdFunction(unsafe.Pointer(f))
}
+var sysDirectory [521]byte
+var sysDirectoryLen uintptr
+
+func windowsLoadSystemLib(name []byte) uintptr {
+ if useLoadLibraryEx {
+ return stdcall3(_LoadLibraryExA, uintptr(unsafe.Pointer(&name[0])), 0, _LOAD_LIBRARY_SEARCH_SYSTEM32)
+ } else {
+ if sysDirectoryLen == 0 {
+ l := stdcall2(_GetSystemDirectoryA, uintptr(unsafe.Pointer(&sysDirectory[0])), uintptr(len(sysDirectory)-1))
+ if l == 0 || l > uintptr(len(sysDirectory)-1) {
+ throw("Unable to determine system directory")
+ }
+ sysDirectory[l] = '\\'
+ sysDirectoryLen = l + 1
+ }
+ absName := append(sysDirectory[:sysDirectoryLen], name...)
+ return stdcall1(_LoadLibraryA, uintptr(unsafe.Pointer(&absName[0])))
+ }
+}
+
func loadOptionalSyscalls() {
var kernel32dll = []byte("kernel32.dll\000")
k32 := stdcall1(_LoadLibraryA, uintptr(unsafe.Pointer(&kernel32dll[0])))
_AddDllDirectory = windowsFindfunc(k32, []byte("AddDllDirectory\000"))
_AddVectoredContinueHandler = windowsFindfunc(k32, []byte("AddVectoredContinueHandler\000"))
_GetQueuedCompletionStatusEx = windowsFindfunc(k32, []byte("GetQueuedCompletionStatusEx\000"))
+ _LoadLibraryExA = windowsFindfunc(k32, []byte("LoadLibraryExA\000"))
_LoadLibraryExW = windowsFindfunc(k32, []byte("LoadLibraryExW\000"))
+ useLoadLibraryEx = (_LoadLibraryExW != nil && _LoadLibraryExA != nil && _AddDllDirectory != nil)
var advapi32dll = []byte("advapi32.dll\000")
- a32 := stdcall1(_LoadLibraryA, uintptr(unsafe.Pointer(&advapi32dll[0])))
+ a32 := windowsLoadSystemLib(advapi32dll)
if a32 == 0 {
throw("advapi32.dll not found")
}
_RtlGenRandom = windowsFindfunc(a32, []byte("SystemFunction036\000"))
var ntdll = []byte("ntdll.dll\000")
- n32 := stdcall1(_LoadLibraryA, uintptr(unsafe.Pointer(&ntdll[0])))
+ n32 := windowsLoadSystemLib(ntdll)
if n32 == 0 {
throw("ntdll.dll not found")
}
}
}
+ var winmmdll = []byte("winmm.dll\000")
+ m32 := windowsLoadSystemLib(winmmdll)
+ if m32 == 0 {
+ throw("winmm.dll not found")
+ }
+ _timeBeginPeriod = windowsFindfunc(m32, []byte("timeBeginPeriod\000"))
+ _timeEndPeriod = windowsFindfunc(m32, []byte("timeEndPeriod\000"))
+ if _timeBeginPeriod == nil || _timeEndPeriod == nil {
+ throw("timeBegin/EndPeriod not found")
+ }
+
+ var ws232dll = []byte("ws2_32.dll\000")
+ ws232 := windowsLoadSystemLib(ws232dll)
+ if ws232 == 0 {
+ throw("ws2_32.dll not found")
+ }
+ _WSAGetOverlappedResult = windowsFindfunc(ws232, []byte("WSAGetOverlappedResult\000"))
+ if _WSAGetOverlappedResult == nil {
+ throw("WSAGetOverlappedResult not found")
+ }
+
if windowsFindfunc(n32, []byte("wine_get_version\000")) != nil {
// running on Wine
initWine(k32)
loadOptionalSyscalls()
- useLoadLibraryEx = (_LoadLibraryExW != nil && _AddDllDirectory != nil)
-
disableWER()
initExceptionHandler()
const _LOAD_LIBRARY_SEARCH_SYSTEM32 = 0x00000800
+// When available, this function will use LoadLibraryEx with the filename
+// parameter and the important SEARCH_SYSTEM32 argument. But on systems that
+// do not have that option, absoluteFilepath should contain a fallback
+// to the full path inside of system32 for use with vanilla LoadLibrary.
//go:linkname syscall_loadsystemlibrary syscall.loadsystemlibrary
//go:nosplit
-func syscall_loadsystemlibrary(filename *uint16) (handle, err uintptr) {
+func syscall_loadsystemlibrary(filename *uint16, absoluteFilepath *uint16) (handle, err uintptr) {
lockOSThread()
defer unlockOSThread()
c := &getg().m.syscall
}{filename, 0, _LOAD_LIBRARY_SEARCH_SYSTEM32}
c.args = uintptr(noescape(unsafe.Pointer(&args)))
} else {
- // User doesn't have KB2533623 installed. The caller
- // wanted to only load the filename DLL from the
- // System32 directory but that facility doesn't exist,
- // so just load it the normal way. This is a potential
- // security risk, but so is not installing security
- // updates.
c.fn = getLoadLibrary()
c.n = 1
- c.args = uintptr(noescape(unsafe.Pointer(&filename)))
+ c.args = uintptr(noescape(unsafe.Pointer(&absoluteFilepath)))
}
cgocall(asmstdcallAddr, unsafe.Pointer(c))
func Syscall15(trap, nargs, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15 uintptr) (r1, r2 uintptr, err Errno)
func Syscall18(trap, nargs, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18 uintptr) (r1, r2 uintptr, err Errno)
func loadlibrary(filename *uint16) (handle uintptr, err Errno)
-func loadsystemlibrary(filename *uint16) (handle uintptr, err Errno)
+func loadsystemlibrary(filename *uint16, absoluteFilepath *uint16) (handle uintptr, err Errno)
func getprocaddress(handle uintptr, procname *uint8) (proc uintptr, err Errno)
// A DLL implements access to a single DLL.
Handle Handle
}
+// We use this for computing the absolute path for system DLLs on systems
+// where SEARCH_SYSTEM32 is not available.
+var systemDirectoryPrefix string
+
+func init() {
+ n := uint32(MAX_PATH)
+ for {
+ b := make([]uint16, n)
+ l, e := getSystemDirectory(&b[0], n)
+ if e != nil {
+ panic("Unable to determine system directory: " + e.Error())
+ }
+ if l <= n {
+ systemDirectoryPrefix = UTF16ToString(b[:l]) + "\\"
+ break
+ }
+ n = l
+ }
+}
+
// LoadDLL loads the named DLL file into memory.
//
// If name is not an absolute path and is not a known system DLL used by
var h uintptr
var e Errno
if sysdll.IsSystemDLL[name] {
- h, e = loadsystemlibrary(namep)
+ absoluteFilepathp, err := UTF16PtrFromString(systemDirectoryPrefix + name)
+ if err != nil {
+ return nil, err
+ }
+ h, e = loadsystemlibrary(namep, absoluteFilepathp)
} else {
h, e = loadlibrary(namep)
}