DotNet MetadataToken Wildcarding

- Better DotNet MetadataToken wildcarding
- Does not wildcard the last byte as it is representing the table entry
in the stream

src/disassemblers/custom/cil/instruction.rs

@@ -183,6 +183,12 @@ impl <'instruction> Instruction <'instruction> {
 
     pub fn pattern(&self) -> String {
         if self.is_wildcard() { return "??".repeat(self.size()); }
+        if self.is_metadata_token_wildcard_instruction() {
+            let mut pattern = Binary::to_hex(&self.mnemonic_bytes());
+            pattern.push_str(&"??".repeat(self.operand_size() - 1));
+            pattern.push_str(&Binary::to_hex(&vec![*self.operand_bytes().last().unwrap()]));
+            return pattern;
+        }
         let mut pattern = Binary::to_hex(&self.mnemonic_bytes());
         pattern.push_str(&"??".repeat(self.operand_size()));
         pattern
@@ -330,6 +336,17 @@ impl <'instruction> Instruction <'instruction> {
         }
     }
 
+    pub fn is_metadata_token_wildcard_instruction(&self) -> bool {
+        match self.mnemonic {
+            Mnemonic::Call => true,
+            Mnemonic::CallVirt => true,
+            Mnemonic::LdSFld => true,
+            Mnemonic::LdFld => true,
+            Mnemonic::NewObj => true,
+            _ => false,
+        }
+    }
+
     pub fn get_call_metadata_token(&self) -> Option<u32> {
         if matches!(self.mnemonic, Mnemonic::Call | Mnemonic::CallVirt) {
             let operand_bytes = self.operand_bytes();