branch.cc revision 7720
16691Stjones1@inf.ed.ac.uk/* 26691Stjones1@inf.ed.ac.uk * Copyright (c) 2009 The University of Edinburgh 36691Stjones1@inf.ed.ac.uk * All rights reserved. 46691Stjones1@inf.ed.ac.uk * 56691Stjones1@inf.ed.ac.uk * Redistribution and use in source and binary forms, with or without 66691Stjones1@inf.ed.ac.uk * modification, are permitted provided that the following conditions are 76691Stjones1@inf.ed.ac.uk * met: redistributions of source code must retain the above copyright 86691Stjones1@inf.ed.ac.uk * notice, this list of conditions and the following disclaimer; 96691Stjones1@inf.ed.ac.uk * redistributions in binary form must reproduce the above copyright 106691Stjones1@inf.ed.ac.uk * notice, this list of conditions and the following disclaimer in the 116691Stjones1@inf.ed.ac.uk * documentation and/or other materials provided with the distribution; 126691Stjones1@inf.ed.ac.uk * neither the name of the copyright holders nor the names of its 136691Stjones1@inf.ed.ac.uk * contributors may be used to endorse or promote products derived from 146691Stjones1@inf.ed.ac.uk * this software without specific prior written permission. 156691Stjones1@inf.ed.ac.uk * 166691Stjones1@inf.ed.ac.uk * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 176691Stjones1@inf.ed.ac.uk * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 186691Stjones1@inf.ed.ac.uk * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 196691Stjones1@inf.ed.ac.uk * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 206691Stjones1@inf.ed.ac.uk * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 216691Stjones1@inf.ed.ac.uk * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 226691Stjones1@inf.ed.ac.uk * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 236691Stjones1@inf.ed.ac.uk * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 246691Stjones1@inf.ed.ac.uk * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 256691Stjones1@inf.ed.ac.uk * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 266691Stjones1@inf.ed.ac.uk * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 276691Stjones1@inf.ed.ac.uk * 286691Stjones1@inf.ed.ac.uk * Authors: Timothy M. Jones 296691Stjones1@inf.ed.ac.uk */ 306691Stjones1@inf.ed.ac.uk 316691Stjones1@inf.ed.ac.uk#include "arch/power/insts/branch.hh" 326691Stjones1@inf.ed.ac.uk#include "base/loader/symtab.hh" 337680Sgblack@eecs.umich.edu#include "cpu/thread_context.hh" 346691Stjones1@inf.ed.ac.uk 356691Stjones1@inf.ed.ac.ukusing namespace PowerISA; 366691Stjones1@inf.ed.ac.uk 376691Stjones1@inf.ed.ac.ukconst std::string & 386691Stjones1@inf.ed.ac.ukPCDependentDisassembly::disassemble(Addr pc, const SymbolTable *symtab) const 396691Stjones1@inf.ed.ac.uk{ 406691Stjones1@inf.ed.ac.uk if (!cachedDisassembly || 416691Stjones1@inf.ed.ac.uk pc != cachedPC || symtab != cachedSymtab) 426691Stjones1@inf.ed.ac.uk { 436691Stjones1@inf.ed.ac.uk if (cachedDisassembly) 446691Stjones1@inf.ed.ac.uk delete cachedDisassembly; 456691Stjones1@inf.ed.ac.uk 466691Stjones1@inf.ed.ac.uk cachedDisassembly = 476691Stjones1@inf.ed.ac.uk new std::string(generateDisassembly(pc, symtab)); 486691Stjones1@inf.ed.ac.uk cachedPC = pc; 496691Stjones1@inf.ed.ac.uk cachedSymtab = symtab; 506691Stjones1@inf.ed.ac.uk } 516691Stjones1@inf.ed.ac.uk 526691Stjones1@inf.ed.ac.uk return *cachedDisassembly; 536691Stjones1@inf.ed.ac.uk} 546691Stjones1@inf.ed.ac.uk 557720Sgblack@eecs.umich.eduPowerISA::PCState 567720Sgblack@eecs.umich.eduBranchPCRel::branchTarget(const PowerISA::PCState &pc) const 576691Stjones1@inf.ed.ac.uk{ 587720Sgblack@eecs.umich.edu return (uint32_t)(pc.pc() + disp); 596691Stjones1@inf.ed.ac.uk} 606691Stjones1@inf.ed.ac.uk 616691Stjones1@inf.ed.ac.ukstd::string 626691Stjones1@inf.ed.ac.ukBranchPCRel::generateDisassembly(Addr pc, const SymbolTable *symtab) const 636691Stjones1@inf.ed.ac.uk{ 646691Stjones1@inf.ed.ac.uk std::stringstream ss; 656691Stjones1@inf.ed.ac.uk 666691Stjones1@inf.ed.ac.uk ccprintf(ss, "%-10s ", mnemonic); 676691Stjones1@inf.ed.ac.uk 686691Stjones1@inf.ed.ac.uk Addr target = pc + disp; 696691Stjones1@inf.ed.ac.uk 706691Stjones1@inf.ed.ac.uk std::string str; 716691Stjones1@inf.ed.ac.uk if (symtab && symtab->findSymbol(target, str)) 726691Stjones1@inf.ed.ac.uk ss << str; 736691Stjones1@inf.ed.ac.uk else 746691Stjones1@inf.ed.ac.uk ccprintf(ss, "0x%x", target); 756691Stjones1@inf.ed.ac.uk 766691Stjones1@inf.ed.ac.uk return ss.str(); 776691Stjones1@inf.ed.ac.uk} 786691Stjones1@inf.ed.ac.uk 797720Sgblack@eecs.umich.eduPowerISA::PCState 807720Sgblack@eecs.umich.eduBranchNonPCRel::branchTarget(const PowerISA::PCState &pc) const 816691Stjones1@inf.ed.ac.uk{ 826691Stjones1@inf.ed.ac.uk return targetAddr; 836691Stjones1@inf.ed.ac.uk} 846691Stjones1@inf.ed.ac.uk 856691Stjones1@inf.ed.ac.ukstd::string 866691Stjones1@inf.ed.ac.ukBranchNonPCRel::generateDisassembly(Addr pc, const SymbolTable *symtab) const 876691Stjones1@inf.ed.ac.uk{ 886691Stjones1@inf.ed.ac.uk std::stringstream ss; 896691Stjones1@inf.ed.ac.uk 906691Stjones1@inf.ed.ac.uk ccprintf(ss, "%-10s ", mnemonic); 916691Stjones1@inf.ed.ac.uk 926691Stjones1@inf.ed.ac.uk std::string str; 936691Stjones1@inf.ed.ac.uk if (symtab && symtab->findSymbol(targetAddr, str)) 946691Stjones1@inf.ed.ac.uk ss << str; 956691Stjones1@inf.ed.ac.uk else 966691Stjones1@inf.ed.ac.uk ccprintf(ss, "0x%x", targetAddr); 976691Stjones1@inf.ed.ac.uk 986691Stjones1@inf.ed.ac.uk return ss.str(); 996691Stjones1@inf.ed.ac.uk} 1006691Stjones1@inf.ed.ac.uk 1017720Sgblack@eecs.umich.eduPowerISA::PCState 1027720Sgblack@eecs.umich.eduBranchPCRelCond::branchTarget(const PowerISA::PCState &pc) const 1036691Stjones1@inf.ed.ac.uk{ 1047720Sgblack@eecs.umich.edu return (uint32_t)(pc.pc() + disp); 1056691Stjones1@inf.ed.ac.uk} 1066691Stjones1@inf.ed.ac.uk 1076691Stjones1@inf.ed.ac.ukstd::string 1086691Stjones1@inf.ed.ac.ukBranchPCRelCond::generateDisassembly(Addr pc, const SymbolTable *symtab) const 1096691Stjones1@inf.ed.ac.uk{ 1106691Stjones1@inf.ed.ac.uk std::stringstream ss; 1116691Stjones1@inf.ed.ac.uk 1126691Stjones1@inf.ed.ac.uk ccprintf(ss, "%-10s ", mnemonic); 1136691Stjones1@inf.ed.ac.uk 1146691Stjones1@inf.ed.ac.uk ss << bo << ", " << bi << ", "; 1156691Stjones1@inf.ed.ac.uk 1166691Stjones1@inf.ed.ac.uk Addr target = pc + disp; 1176691Stjones1@inf.ed.ac.uk 1186691Stjones1@inf.ed.ac.uk std::string str; 1196691Stjones1@inf.ed.ac.uk if (symtab && symtab->findSymbol(target, str)) 1206691Stjones1@inf.ed.ac.uk ss << str; 1216691Stjones1@inf.ed.ac.uk else 1226691Stjones1@inf.ed.ac.uk ccprintf(ss, "0x%x", target); 1236691Stjones1@inf.ed.ac.uk 1246691Stjones1@inf.ed.ac.uk return ss.str(); 1256691Stjones1@inf.ed.ac.uk} 1266691Stjones1@inf.ed.ac.uk 1277720Sgblack@eecs.umich.eduPowerISA::PCState 1287720Sgblack@eecs.umich.eduBranchNonPCRelCond::branchTarget(const PowerISA::PCState &pc) const 1296691Stjones1@inf.ed.ac.uk{ 1306691Stjones1@inf.ed.ac.uk return targetAddr; 1316691Stjones1@inf.ed.ac.uk} 1326691Stjones1@inf.ed.ac.uk 1336691Stjones1@inf.ed.ac.ukstd::string 1346691Stjones1@inf.ed.ac.ukBranchNonPCRelCond::generateDisassembly(Addr pc, 1356691Stjones1@inf.ed.ac.uk const SymbolTable *symtab) const 1366691Stjones1@inf.ed.ac.uk{ 1376691Stjones1@inf.ed.ac.uk std::stringstream ss; 1386691Stjones1@inf.ed.ac.uk 1396691Stjones1@inf.ed.ac.uk ccprintf(ss, "%-10s ", mnemonic); 1406691Stjones1@inf.ed.ac.uk 1416691Stjones1@inf.ed.ac.uk ss << bo << ", " << bi << ", "; 1426691Stjones1@inf.ed.ac.uk 1436691Stjones1@inf.ed.ac.uk std::string str; 1446691Stjones1@inf.ed.ac.uk if (symtab && symtab->findSymbol(targetAddr, str)) 1456691Stjones1@inf.ed.ac.uk ss << str; 1466691Stjones1@inf.ed.ac.uk else 1476691Stjones1@inf.ed.ac.uk ccprintf(ss, "0x%x", targetAddr); 1486691Stjones1@inf.ed.ac.uk 1496691Stjones1@inf.ed.ac.uk return ss.str(); 1506691Stjones1@inf.ed.ac.uk} 1516691Stjones1@inf.ed.ac.uk 1527720Sgblack@eecs.umich.eduPowerISA::PCState 1536691Stjones1@inf.ed.ac.ukBranchRegCond::branchTarget(ThreadContext *tc) const 1546691Stjones1@inf.ed.ac.uk{ 1556691Stjones1@inf.ed.ac.uk uint32_t regVal = tc->readIntReg(_srcRegIdx[_numSrcRegs - 1]); 1567720Sgblack@eecs.umich.edu return regVal & 0xfffffffc; 1576691Stjones1@inf.ed.ac.uk} 1586691Stjones1@inf.ed.ac.uk 1596691Stjones1@inf.ed.ac.ukstd::string 1606691Stjones1@inf.ed.ac.ukBranchRegCond::generateDisassembly(Addr pc, 1616691Stjones1@inf.ed.ac.uk const SymbolTable *symtab) const 1626691Stjones1@inf.ed.ac.uk{ 1636691Stjones1@inf.ed.ac.uk std::stringstream ss; 1646691Stjones1@inf.ed.ac.uk 1656691Stjones1@inf.ed.ac.uk ccprintf(ss, "%-10s ", mnemonic); 1666691Stjones1@inf.ed.ac.uk 1676691Stjones1@inf.ed.ac.uk ss << bo << ", " << bi << ", "; 1686691Stjones1@inf.ed.ac.uk 1696691Stjones1@inf.ed.ac.uk return ss.str(); 1706691Stjones1@inf.ed.ac.uk} 171