172 lines
4.4 KiB
C++
172 lines
4.4 KiB
C++
/*
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* Copyright (c) 2009 The University of Edinburgh
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Timothy M. Jones
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*/
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#include "arch/power/insts/branch.hh"
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#include "base/loader/symtab.hh"
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#include "cpu/thread_context.hh"
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using namespace PowerISA;
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const std::string &
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PCDependentDisassembly::disassemble(Addr pc, const SymbolTable *symtab) const
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{
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if (!cachedDisassembly ||
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pc != cachedPC || symtab != cachedSymtab)
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{
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if (cachedDisassembly)
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delete cachedDisassembly;
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cachedDisassembly =
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new std::string(generateDisassembly(pc, symtab));
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cachedPC = pc;
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cachedSymtab = symtab;
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}
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return *cachedDisassembly;
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}
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PowerISA::PCState
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BranchPCRel::branchTarget(const PowerISA::PCState &pc) const
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{
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return (uint32_t)(pc.pc() + disp);
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}
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std::string
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BranchPCRel::generateDisassembly(Addr pc, const SymbolTable *symtab) const
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{
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std::stringstream ss;
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ccprintf(ss, "%-10s ", mnemonic);
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Addr target = pc + disp;
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std::string str;
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if (symtab && symtab->findSymbol(target, str))
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ss << str;
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else
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ccprintf(ss, "0x%x", target);
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return ss.str();
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}
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PowerISA::PCState
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BranchNonPCRel::branchTarget(const PowerISA::PCState &pc) const
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{
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return targetAddr;
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}
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std::string
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BranchNonPCRel::generateDisassembly(Addr pc, const SymbolTable *symtab) const
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{
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std::stringstream ss;
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ccprintf(ss, "%-10s ", mnemonic);
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std::string str;
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if (symtab && symtab->findSymbol(targetAddr, str))
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ss << str;
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else
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ccprintf(ss, "0x%x", targetAddr);
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return ss.str();
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}
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PowerISA::PCState
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BranchPCRelCond::branchTarget(const PowerISA::PCState &pc) const
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{
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return (uint32_t)(pc.pc() + disp);
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}
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std::string
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BranchPCRelCond::generateDisassembly(Addr pc, const SymbolTable *symtab) const
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{
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std::stringstream ss;
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ccprintf(ss, "%-10s ", mnemonic);
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ss << bo << ", " << bi << ", ";
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Addr target = pc + disp;
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std::string str;
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if (symtab && symtab->findSymbol(target, str))
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ss << str;
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else
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ccprintf(ss, "0x%x", target);
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return ss.str();
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}
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PowerISA::PCState
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BranchNonPCRelCond::branchTarget(const PowerISA::PCState &pc) const
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{
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return targetAddr;
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}
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std::string
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BranchNonPCRelCond::generateDisassembly(Addr pc,
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const SymbolTable *symtab) const
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{
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std::stringstream ss;
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ccprintf(ss, "%-10s ", mnemonic);
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ss << bo << ", " << bi << ", ";
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std::string str;
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if (symtab && symtab->findSymbol(targetAddr, str))
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ss << str;
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else
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ccprintf(ss, "0x%x", targetAddr);
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return ss.str();
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}
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PowerISA::PCState
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BranchRegCond::branchTarget(ThreadContext *tc) const
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{
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uint32_t regVal = tc->readIntReg(_srcRegIdx[_numSrcRegs - 1]);
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return regVal & 0xfffffffc;
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}
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std::string
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BranchRegCond::generateDisassembly(Addr pc,
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const SymbolTable *symtab) const
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{
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std::stringstream ss;
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ccprintf(ss, "%-10s ", mnemonic);
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ss << bo << ", " << bi << ", ";
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return ss.str();
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}
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