Misra: Add rule 11.6

addons/misra-test.c

@@ -8,6 +8,7 @@
 #include <tgmath.h> // 21.11
 
 typedef unsigned char u8;
+typedef unsigned long long u64;
 
 void misra_5_1() {
   int a123456789012345678901234567890; // no-warning
@@ -23,6 +24,12 @@ void misra_7_3() {
   int x = 12lu; // 7.3
 }
 
+void misra_11_6() {
+  void *p;
+  p = (void*)123; // 11.6
+  x = (u64)p; // 11.6
+}
+
 struct Fred {}; struct Wilma {};
 void misra_11_7(struct Fred *fred) {
   struct Wilma *wilma = (struct Wilma *)fred; // 11.7

addons/misra.py

@@ -266,6 +266,19 @@ def misra_12_1_sizeof(rawTokens):
            else:
                state = 0
 
+def misra_11_6(data):
+    for token in data.tokenlist:
+        if not isCast(token):
+            continue
+        vt1 = token.valueType
+        vt2 = token.astOperand1.valueType
+        if not vt1 or not vt2:
+            continue
+        if vt1.pointer==1 and vt1.type=='void' and vt2.pointer==0:
+            reportError(token, 11, 6)
+        elif vt1.pointer==0 and vt2.pointer==1 and vt2.type=='void':
+            reportError(token, 11, 6)
+
 def misra_11_7(data):
     for token in data.tokenlist:
         if not isCast(token):
@@ -741,6 +754,7 @@ for arg in sys.argv[1:]:
         if cfgNumber == 1:
             misra_7_1(data.rawTokens)
             misra_7_3(data.rawTokens)
+        misra_11_6(cfg)
         misra_11_7(cfg)
         misra_11_8(cfg)
         misra_11_9(cfg)