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//===-EDOperand.h - LLVM Enhanced Disassembler ------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the interface for the Enhanced Disassembly library's
// operand class. The operand is responsible for allowing evaluation given a
// particular register context.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_EDOPERAND_H
#define LLVM_EDOPERAND_H
#include "llvm/System/DataTypes.h"
namespace llvm {
struct EDDisassembler;
struct EDInst;
typedef int (*EDRegisterReaderCallback)(uint64_t *value, unsigned regID,
void* arg);
/// EDOperand - Encapsulates a single operand, which can be evaluated by the
/// client
struct EDOperand {
/// The parent disassembler
const EDDisassembler &Disassembler;
/// The parent instruction
const EDInst &Inst;
/// The index of the operand in the EDInst
unsigned int OpIndex;
/// The index of the first component of the operand in the MCInst
unsigned int MCOpIndex;
/// Constructor - Initializes an EDOperand
///
/// @arg disassembler - The disassembler responsible for the operand
/// @arg inst - The instruction containing this operand
/// @arg opIndex - The index of the operand in inst
/// @arg mcOpIndex - The index of the operand in the original MCInst
EDOperand(const EDDisassembler &disassembler,
const EDInst &inst,
unsigned int opIndex,
unsigned int &mcOpIndex);
~EDOperand();
/// evaluate - Returns the numeric value of an operand to the extent possible,
/// returning 0 on success or -1 if there was some problem (such as a
/// register not being readable)
///
/// @arg result - A reference whose target is filled in with the value of
/// the operand (the address if it is a memory operand)
/// @arg callback - A function to call to obtain register values
/// @arg arg - An opaque argument to pass to callback
int evaluate(uint64_t &result,
EDRegisterReaderCallback callback,
void *arg);
/// isRegister - Returns 1 if the operand is a register or 0 otherwise
int isRegister();
/// regVal - Returns the register value.
unsigned regVal();
/// isImmediate - Returns 1 if the operand is an immediate or 0 otherwise
int isImmediate();
/// immediateVal - Returns the immediate value.
uint64_t immediateVal();
/// isMemory - Returns 1 if the operand is a memory location or 0 otherwise
int isMemory();
#ifdef __BLOCKS__
typedef int (^EDRegisterBlock_t)(uint64_t *value, unsigned regID);
/// evaluate - Like evaluate for a callback, but uses a block instead
int evaluate(uint64_t &result,
EDRegisterBlock_t regBlock);
#endif
};
} // end namespace llvm
#endif
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