windows: use syscall.SyscallN in Proc.Call

All the SyscallX functions are deprecated in favor of SyscallN. The
latter is easier to use, supports more arguments, and uses less stack.

Autogenerated wrappers already switch to SyscallN in https://go-review.googlesource.com/c/sys/+/691715.

Fixes golang/go#78317

Change-Id: I7e56e713d1c20558e9932d757299796836c9c04f
Reviewed-on: https://go-review.googlesource.com/c/sys/+/758700
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Quim Muntal <quimmuntal@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>

windows/dll_windows.go

diff --git a/windows/dll_windows.go b/windows/dll_windows.go
index 3ca814f..1157b06 100644
--- a/windows/dll_windows.go
+++ b/windows/dll_windows.go
@@ -163,42 +163,7 @@
 // (according to the semantics of the specific function being called) before consulting
 // the error. The error will be guaranteed to contain windows.Errno.
 func (p *Proc) Call(a ...uintptr) (r1, r2 uintptr, lastErr error) {
-	switch len(a) {
-	case 0:
-		return syscall.Syscall(p.Addr(), uintptr(len(a)), 0, 0, 0)
-	case 1:
-		return syscall.Syscall(p.Addr(), uintptr(len(a)), a[0], 0, 0)
-	case 2:
-		return syscall.Syscall(p.Addr(), uintptr(len(a)), a[0], a[1], 0)
-	case 3:
-		return syscall.Syscall(p.Addr(), uintptr(len(a)), a[0], a[1], a[2])
-	case 4:
-		return syscall.Syscall6(p.Addr(), uintptr(len(a)), a[0], a[1], a[2], a[3], 0, 0)
-	case 5:
-		return syscall.Syscall6(p.Addr(), uintptr(len(a)), a[0], a[1], a[2], a[3], a[4], 0)
-	case 6:
-		return syscall.Syscall6(p.Addr(), uintptr(len(a)), a[0], a[1], a[2], a[3], a[4], a[5])
-	case 7:
-		return syscall.Syscall9(p.Addr(), uintptr(len(a)), a[0], a[1], a[2], a[3], a[4], a[5], a[6], 0, 0)
-	case 8:
-		return syscall.Syscall9(p.Addr(), uintptr(len(a)), a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], 0)
-	case 9:
-		return syscall.Syscall9(p.Addr(), uintptr(len(a)), a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8])
-	case 10:
-		return syscall.Syscall12(p.Addr(), uintptr(len(a)), a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], a[9], 0, 0)
-	case 11:
-		return syscall.Syscall12(p.Addr(), uintptr(len(a)), a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], a[9], a[10], 0)
-	case 12:
-		return syscall.Syscall12(p.Addr(), uintptr(len(a)), a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], a[9], a[10], a[11])
-	case 13:
-		return syscall.Syscall15(p.Addr(), uintptr(len(a)), a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], a[9], a[10], a[11], a[12], 0, 0)
-	case 14:
-		return syscall.Syscall15(p.Addr(), uintptr(len(a)), a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], a[9], a[10], a[11], a[12], a[13], 0)
-	case 15:
-		return syscall.Syscall15(p.Addr(), uintptr(len(a)), a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], a[9], a[10], a[11], a[12], a[13], a[14])
-	default:
-		panic("Call " + p.Name + " with too many arguments " + itoa(len(a)) + ".")
-	}
+	return syscall.SyscallN(p.Addr(), a...)
 }
 
 // A LazyDLL implements access to a single DLL.