2014-10-30 23:36:25 +08:00
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/**************************************************************************************************
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Verteron Disassembler Engine
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Version 1.0
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Remarks : Freeware, Copyright must be included
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Original Author : Florian Bernd
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Modifications :
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Last change : 30. October 2014
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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**************************************************************************************************/
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#include "VXDisassemblerUtils.h"
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2014-11-03 22:15:48 +08:00
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#include <assert.h>
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2014-10-30 23:36:25 +08:00
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namespace Verteron
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{
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uint64_t VDECalcAbsoluteTarget(const VXInstructionInfo &info, const VXOperandInfo &operand)
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{
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assert((operand.type == VXOperandType::REL_IMMEDIATE) ||
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((operand.type == VXOperandType::MEMORY) && (operand.base == VXRegister::RIP)));
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uint64_t truncMask = 0xFFFFFFFFFFFFFFFFull;
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if (!(info.flags & IF_DISASSEMBLER_MODE_64))
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{
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truncMask >>= (64 - info.operand_mode);
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}
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uint16_t size = operand.size;
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if ((operand.type == VXOperandType::MEMORY) && (operand.base == VXRegister::RIP))
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{
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size = operand.offset;
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}
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switch (size)
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{
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case 8:
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return (info.instrPointer + operand.lval.sbyte) & truncMask;
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case 16:
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{
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uint32_t delta = operand.lval.sword & truncMask;
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if ((info.instrPointer + delta) > 0xFFFF)
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{
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return (info.instrPointer & 0xF0000) + ((info.instrPointer + delta) & 0xFFFF);
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}
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return info.instrPointer + delta;
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}
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case 32:
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return (info.instrPointer + operand.lval.sdword) & truncMask;
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default:
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assert(0);
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}
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return 0;
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}
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}
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