decode long NOP in x86

airbus-seclab · Dec 22, 2017 · ac8ac17 · ac8ac17
1 parent 77f4254
commit ac8ac17
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/ocaml/src/disassembly/x86.ml b/ocaml/src/disassembly/x86.ml
@@ -2322,6 +2322,8 @@ struct
             match getchar s with
             | '\x00' -> grp6 s
             | '\x01' -> grp7 s
+            (* long nop *)
+            | '\x1F' -> let _, _ = operands_from_mod_reg_rm s s.operand_sz 0 in return s [ Nop ]
             (* CMOVcc *)
             | c when '\x40' <= c && c <= '\x4f' -> let cond = (Char.code c) - 0x40 in cmovcc s cond