Bugfixing in L4-Sys

git-svn-id: https://www4.informatik.uni-erlangen.de/i4svn/danceos/trunk/devel/fail@1379 8c4709b5-6ec9-48aa-a5cd-a96041d1645a

src/experiments/l4-sys/UDIS86.hpp

@@ -0,0 +1,41 @@
+#ifndef __UDIS86_HPP__
+  #define __UDIS86_HPP__
+
+#include <udis86.h>
+#include "sal/bochs/BochsRegister.hpp"
+
+/**
+ * \class Udis86
+ *
+ * \brief Class to disassemble instructions
+ *
+ * This class disassembles a stream of machine code instruction
+ * by instruction.
+ * It provides a (thin) wrapper around the C API of UDIS86.
+ */
+class Udis86
+{
+private:
+	ud_t ud_obj; //<! the ud object of udis86
+public:
+	Udis86(const unsigned char *instr, size_t size);
+	/**
+	 * retrieves the private ud structure of udis86
+	 * @returns a reference pointer to a ud_t variable
+	 */
+	inline const ud_t &getCurrentState() const { return ud_obj; }
+	/**
+	 * Tries to decode the next instruction from the given buffer.
+	 * @returns \c true if a new instruction could be retrieved, \c false if the object has expired
+	 */
+	bool fetchNextInstruction();
+	/**
+	 * Returns the FailBochs equivalent to a UDIS86 GPR identifier.
+	 * Attention: this only returns either 32-bit or 64-bit registers, no general IDs
+	 * @param udisReg the udis86 GPR ID
+	 * @returns the FailBochs GPR ID, usable with the BochsRegisterManager class
+	 */
+	static fail::GPRegisterId udisGPRToFailBochsGPR(ud_type_t udisReg);
+};
+
+#endif // __UDIS86_HPP__