222 lines
8.6 KiB
C++
222 lines
8.6 KiB
C++
/*
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* Copyright 2015 LabWare
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* Copyright 2014 Google, Inc.
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* Copyright (c) 2007 The Hewlett-Packard Development Company
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* All rights reserved.
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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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: Gabe Black
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* Boris Shingarov
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*/
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#include "arch/x86/remote_gdb.hh"
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#include <sys/signal.h>
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#include <unistd.h>
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#include <string>
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#include "arch/vtophys.hh"
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#include "arch/x86/pagetable_walker.hh"
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#include "arch/x86/process.hh"
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#include "arch/x86/regs/int.hh"
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#include "arch/x86/regs/misc.hh"
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#include "base/remote_gdb.hh"
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#include "base/socket.hh"
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#include "base/trace.hh"
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#include "cpu/base.hh"
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#include "cpu/thread_context.hh"
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#include "debug/GDBAcc.hh"
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#include "mem/page_table.hh"
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#include "sim/full_system.hh"
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using namespace std;
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using namespace X86ISA;
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RemoteGDB::RemoteGDB(System *_system, ThreadContext *c) :
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BaseRemoteGDB(_system, c)
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{}
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bool
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RemoteGDB::acc(Addr va, size_t len)
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{
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if (FullSystem) {
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Walker *walker = context->getDTBPtr()->getWalker();
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unsigned logBytes;
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Fault fault = walker->startFunctional(context, va, logBytes,
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BaseTLB::Read);
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if (fault != NoFault)
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return false;
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Addr endVa = va + len - 1;
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if ((va & ~mask(logBytes)) == (endVa & ~mask(logBytes)))
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return true;
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fault = walker->startFunctional(context, endVa, logBytes,
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BaseTLB::Read);
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return fault == NoFault;
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} else {
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TlbEntry entry;
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return context->getProcessPtr()->pTable->lookup(va, entry);
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}
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}
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RemoteGDB::BaseGdbRegCache*
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RemoteGDB::gdbRegs()
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{
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HandyM5Reg m5reg = context->readMiscRegNoEffect(MISCREG_M5_REG);
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if (m5reg.submode == SixtyFourBitMode)
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return new AMD64GdbRegCache(this);
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else
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return new X86GdbRegCache(this);
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}
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void
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RemoteGDB::AMD64GdbRegCache::getRegs(ThreadContext *context)
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{
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DPRINTF(GDBAcc, "getRegs in remotegdb \n");
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r.rax = context->readIntReg(INTREG_RAX);
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r.rbx = context->readIntReg(INTREG_RBX);
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r.rcx = context->readIntReg(INTREG_RCX);
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r.rdx = context->readIntReg(INTREG_RDX);
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r.rsi = context->readIntReg(INTREG_RSI);
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r.rdi = context->readIntReg(INTREG_RDI);
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r.rbp = context->readIntReg(INTREG_RBP);
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r.rsp = context->readIntReg(INTREG_RSP);
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r.r8 = context->readIntReg(INTREG_R8);
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r.r9 = context->readIntReg(INTREG_R9);
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r.r10 = context->readIntReg(INTREG_R10);
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r.r11 = context->readIntReg(INTREG_R11);
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r.r12 = context->readIntReg(INTREG_R12);
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r.r13 = context->readIntReg(INTREG_R13);
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r.r14 = context->readIntReg(INTREG_R14);
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r.r15 = context->readIntReg(INTREG_R15);
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r.rip = context->pcState().pc();
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r.eflags = context->readMiscRegNoEffect(MISCREG_RFLAGS);
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r.cs = context->readMiscRegNoEffect(MISCREG_CS);
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r.ss = context->readMiscRegNoEffect(MISCREG_SS);
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r.ds = context->readMiscRegNoEffect(MISCREG_DS);
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r.es = context->readMiscRegNoEffect(MISCREG_ES);
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r.fs = context->readMiscRegNoEffect(MISCREG_FS);
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r.gs = context->readMiscRegNoEffect(MISCREG_GS);
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}
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void
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RemoteGDB::X86GdbRegCache::getRegs(ThreadContext *context)
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{
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DPRINTF(GDBAcc, "getRegs in remotegdb \n");
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r.eax = context->readIntReg(INTREG_RAX);
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r.ecx = context->readIntReg(INTREG_RCX);
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r.edx = context->readIntReg(INTREG_RDX);
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r.ebx = context->readIntReg(INTREG_RBX);
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r.esp = context->readIntReg(INTREG_RSP);
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r.ebp = context->readIntReg(INTREG_RBP);
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r.esi = context->readIntReg(INTREG_RSI);
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r.edi = context->readIntReg(INTREG_RDI);
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r.eip = context->pcState().pc();
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r.eflags = context->readMiscRegNoEffect(MISCREG_RFLAGS);
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r.cs = context->readMiscRegNoEffect(MISCREG_CS);
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r.ss = context->readMiscRegNoEffect(MISCREG_SS);
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r.ds = context->readMiscRegNoEffect(MISCREG_DS);
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r.es = context->readMiscRegNoEffect(MISCREG_ES);
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r.fs = context->readMiscRegNoEffect(MISCREG_FS);
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r.gs = context->readMiscRegNoEffect(MISCREG_GS);
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}
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void
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RemoteGDB::AMD64GdbRegCache::setRegs(ThreadContext *context) const
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{
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DPRINTF(GDBAcc, "setRegs in remotegdb \n");
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context->setIntReg(INTREG_RAX, r.rax);
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context->setIntReg(INTREG_RBX, r.rbx);
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context->setIntReg(INTREG_RCX, r.rcx);
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context->setIntReg(INTREG_RDX, r.rdx);
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context->setIntReg(INTREG_RSI, r.rsi);
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context->setIntReg(INTREG_RDI, r.rdi);
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context->setIntReg(INTREG_RBP, r.rbp);
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context->setIntReg(INTREG_RSP, r.rsp);
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context->setIntReg(INTREG_R8, r.r8);
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context->setIntReg(INTREG_R9, r.r9);
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context->setIntReg(INTREG_R10, r.r10);
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context->setIntReg(INTREG_R11, r.r11);
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context->setIntReg(INTREG_R12, r.r12);
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context->setIntReg(INTREG_R13, r.r13);
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context->setIntReg(INTREG_R14, r.r14);
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context->setIntReg(INTREG_R15, r.r15);
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context->pcState(r.rip);
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context->setMiscReg(MISCREG_RFLAGS, r.eflags);
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if (r.cs != context->readMiscRegNoEffect(MISCREG_CS))
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warn("Remote gdb: Ignoring update to CS.\n");
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if (r.ss != context->readMiscRegNoEffect(MISCREG_SS))
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warn("Remote gdb: Ignoring update to SS.\n");
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if (r.ds != context->readMiscRegNoEffect(MISCREG_DS))
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warn("Remote gdb: Ignoring update to DS.\n");
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if (r.es != context->readMiscRegNoEffect(MISCREG_ES))
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warn("Remote gdb: Ignoring update to ES.\n");
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if (r.fs != context->readMiscRegNoEffect(MISCREG_FS))
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warn("Remote gdb: Ignoring update to FS.\n");
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if (r.gs != context->readMiscRegNoEffect(MISCREG_GS))
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warn("Remote gdb: Ignoring update to GS.\n");
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}
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void
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RemoteGDB::X86GdbRegCache::setRegs(ThreadContext *context) const
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{
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DPRINTF(GDBAcc, "setRegs in remotegdb \n");
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context->setIntReg(INTREG_RAX, r.eax);
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context->setIntReg(INTREG_RCX, r.ecx);
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context->setIntReg(INTREG_RDX, r.edx);
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context->setIntReg(INTREG_RBX, r.ebx);
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context->setIntReg(INTREG_RSP, r.esp);
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context->setIntReg(INTREG_RBP, r.ebp);
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context->setIntReg(INTREG_RSI, r.esi);
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context->setIntReg(INTREG_RDI, r.edi);
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context->pcState(r.eip);
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context->setMiscReg(MISCREG_RFLAGS, r.eflags);
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if (r.cs != context->readMiscRegNoEffect(MISCREG_CS))
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warn("Remote gdb: Ignoring update to CS.\n");
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if (r.ss != context->readMiscRegNoEffect(MISCREG_SS))
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warn("Remote gdb: Ignoring update to SS.\n");
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if (r.ds != context->readMiscRegNoEffect(MISCREG_DS))
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warn("Remote gdb: Ignoring update to DS.\n");
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if (r.es != context->readMiscRegNoEffect(MISCREG_ES))
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warn("Remote gdb: Ignoring update to ES.\n");
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if (r.fs != context->readMiscRegNoEffect(MISCREG_FS))
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warn("Remote gdb: Ignoring update to FS.\n");
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if (r.gs != context->readMiscRegNoEffect(MISCREG_GS))
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warn("Remote gdb: Ignoring update to GS.\n");
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}
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