shim some Windows functions

Author: RalfJung

src/fn_call.rs

@@ -622,6 +622,25 @@ impl<'a, 'mir, 'tcx: 'mir + 'a> EvalContextExt<'tcx> for EvalContext<'a, 'mir, '
                 self.write_ptr(dest, addr, dest_ty)?;
             }
 
+            // Windows ABI
+            "AddVectoredExceptionHandler" => {
+                // any non zero value works for the stdlib. This is just used for stackoverflows anyway
+                self.write_scalar(dest, Scalar::from_u128(1), dest_ty)?;
+            },
+            "GetModuleHandleW" |
+            "GetProcAddress" |
+            "InitializeCriticalSection" |
+            "EnterCriticalSection" |
+            "LeaveCriticalSection" |
+            "SetLastError" => {
+                // pretend these do not exist/nothing happened, by returning zero
+                self.write_scalar(dest, Scalar::from_u128(0), dest_ty)?;
+            },
+            "GetLastError" => {
+                // this is c::ERROR_CALL_NOT_IMPLEMENTED
+                self.write_scalar(dest, Scalar::from_u128(120), dest_ty)?;
+            },
+
             _ => {
                 return err!(Unimplemented(
                     format!("can't call C ABI function: {}", link_name),
@@ -728,6 +747,7 @@ impl<'a, 'mir, 'tcx: 'mir + 'a> EvalContextExt<'tcx> for EvalContext<'a, 'mir, '
                 let bool = self.tcx.types.bool;
                 self.write_scalar(dest, Scalar::from_bool(false), bool)?;
             }
+
             _ => return err!(NoMirFor(path)),
         }