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/*
* Copyright (c) 2021 Huawei International
* Copyright 2015 LabWare
* Copyright 2014 Google, Inc.
* Copyright (c) 2010 ARM Limited
* Copyright (c) 2020 Barkhausen Institut
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 2017 The University of Virginia
* Copyright (c) 2002-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1990, 1993 The Regents of the University of California
* All rights reserved
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratories.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
*/
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
*
* Taken from NetBSD
*
* "Stub" to allow remote cpu to debug over a serial line using gdb.
*/
#include "arch/riscv/remote_gdb.hh"
#include <string>
#include "arch/riscv/gdb-xml/gdb_xml_riscv_cpu.hh"
#include "arch/riscv/gdb-xml/gdb_xml_riscv_csr.hh"
#include "arch/riscv/gdb-xml/gdb_xml_riscv_fpu.hh"
#include "arch/riscv/gdb-xml/gdb_xml_riscv_target.hh"
#include "arch/riscv/mmu.hh"
#include "arch/riscv/pagetable_walker.hh"
#include "arch/riscv/regs/float.hh"
#include "arch/riscv/regs/int.hh"
#include "arch/riscv/regs/misc.hh"
#include "arch/riscv/tlb.hh"
#include "cpu/thread_state.hh"
#include "debug/GDBAcc.hh"
#include "mem/page_table.hh"
#include "sim/full_system.hh"
namespace gem5
{
using namespace RiscvISA;
RemoteGDB::RemoteGDB(System *_system, int _port)
: BaseRemoteGDB(_system, _port), regCache(this)
{
}
bool
RemoteGDB::acc(Addr va, size_t len)
{
if (FullSystem)
{
MMU *mmu = static_cast<MMU *>(context()->getMMUPtr());
unsigned logBytes;
Addr paddr = va;
PrivilegeMode pmode = mmu->getMemPriv(context(), BaseMMU::Read);
SATP satp = context()->readMiscReg(MISCREG_SATP);
if (pmode != PrivilegeMode::PRV_M &&
satp.mode != AddrXlateMode::BARE) {
Walker *walker = mmu->getDataWalker();
Fault fault = walker->startFunctional(
context(), paddr, logBytes, BaseMMU::Read);
if (fault != NoFault)
return false;
}
return true;
}
return context()->getProcessPtr()->pTable->lookup(va) != nullptr;
}
void
RemoteGDB::RiscvGdbRegCache::getRegs(ThreadContext *context)
{
DPRINTF(GDBAcc, "getregs in remotegdb, size %lu\n", size());
// General registers
for (int i = 0; i < NumIntArchRegs; i++)
{
r.gpr[i] = context->readIntReg(i);
}
r.pc = context->pcState().instAddr();
// Floating point registers
for (int i = 0; i < NumFloatRegs; i++)
r.fpu[i] = context->readFloatReg(i);
r.fflags = context->readMiscRegNoEffect(
CSRData.at(CSR_FFLAGS).physIndex) & CSRMasks.at(CSR_FFLAGS);
r.frm = context->readMiscRegNoEffect(
CSRData.at(CSR_FRM).physIndex) & CSRMasks.at(CSR_FRM);
r.fcsr = context->readMiscRegNoEffect(
CSRData.at(CSR_FCSR).physIndex) & CSRMasks.at(CSR_FCSR);
// CSR registers
r.cycle = context->readMiscRegNoEffect(
CSRData.at(CSR_CYCLE).physIndex);
r.time = context->readMiscRegNoEffect(
CSRData.at(CSR_TIME).physIndex);
// U mode CSR
r.ustatus = context->readMiscRegNoEffect(
CSRData.at(CSR_USTATUS).physIndex) & CSRMasks.at(CSR_USTATUS);
r.uie = context->readMiscReg(
CSRData.at(CSR_UIE).physIndex) & CSRMasks.at(CSR_UIE);
r.utvec = context->readMiscRegNoEffect(
CSRData.at(CSR_UTVEC).physIndex);
r.uscratch = context->readMiscRegNoEffect(
CSRData.at(CSR_USCRATCH).physIndex);
r.uepc = context->readMiscRegNoEffect(
CSRData.at(CSR_UEPC).physIndex);
r.ucause = context->readMiscRegNoEffect(
CSRData.at(CSR_UCAUSE).physIndex);
r.utval = context->readMiscRegNoEffect(
CSRData.at(CSR_UTVAL).physIndex);
r.uip = context->readMiscReg(
CSRData.at(CSR_UIP).physIndex) & CSRMasks.at(CSR_UIP);
// S mode CSR
r.sstatus = context->readMiscRegNoEffect(
CSRData.at(CSR_SSTATUS).physIndex) & CSRMasks.at(CSR_SSTATUS);
r.sedeleg = context->readMiscRegNoEffect(
CSRData.at(CSR_SEDELEG).physIndex);
r.sideleg = context->readMiscRegNoEffect(
CSRData.at(CSR_SIDELEG).physIndex);
r.sie = context->readMiscReg(
CSRData.at(CSR_SIE).physIndex) & CSRMasks.at(CSR_SIE);
r.stvec = context->readMiscRegNoEffect(
CSRData.at(CSR_STVEC).physIndex);
r.scounteren = context->readMiscRegNoEffect(
CSRData.at(CSR_SCOUNTEREN).physIndex);
r.sscratch = context->readMiscRegNoEffect(
CSRData.at(CSR_SSCRATCH).physIndex);
r.sepc = context->readMiscRegNoEffect(
CSRData.at(CSR_SEPC).physIndex);
r.scause = context->readMiscRegNoEffect(
CSRData.at(CSR_SCAUSE).physIndex);
r.stval = context->readMiscRegNoEffect(
CSRData.at(CSR_STVAL).physIndex);
r.sip = context->readMiscReg(
CSRData.at(CSR_SIP).physIndex) & CSRMasks.at(CSR_SIP);
r.satp = context->readMiscRegNoEffect(
CSRData.at(CSR_SATP).physIndex);
// M mode CSR
r.mvendorid = context->readMiscRegNoEffect(
CSRData.at(CSR_MVENDORID).physIndex);
r.marchid = context->readMiscRegNoEffect(
CSRData.at(CSR_MARCHID).physIndex);
r.mimpid = context->readMiscRegNoEffect(
CSRData.at(CSR_MIMPID).physIndex);
r.mhartid = context->readMiscRegNoEffect(
CSRData.at(CSR_MHARTID).physIndex);
r.mstatus = context->readMiscRegNoEffect(
CSRData.at(CSR_MSTATUS).physIndex) & CSRMasks.at(CSR_MSTATUS);
r.misa = context->readMiscRegNoEffect(
CSRData.at(CSR_MISA).physIndex) & CSRMasks.at(CSR_MISA);
r.medeleg = context->readMiscRegNoEffect(
CSRData.at(CSR_MEDELEG).physIndex);
r.mideleg = context->readMiscRegNoEffect(
CSRData.at(CSR_MIDELEG).physIndex);
r.mie = context->readMiscReg(
CSRData.at(CSR_MIE).physIndex) & CSRMasks.at(CSR_MIE);
r.mtvec = context->readMiscRegNoEffect(
CSRData.at(CSR_MTVEC).physIndex);
r.mcounteren = context->readMiscRegNoEffect(
CSRData.at(CSR_MCOUNTEREN).physIndex);
r.mscratch = context->readMiscRegNoEffect(
CSRData.at(CSR_MSCRATCH).physIndex);
r.mepc = context->readMiscRegNoEffect(
CSRData.at(CSR_MEPC).physIndex);
r.mcause = context->readMiscRegNoEffect(
CSRData.at(CSR_MCAUSE).physIndex);
r.mtval = context->readMiscRegNoEffect(
CSRData.at(CSR_MTVAL).physIndex);
r.mip = context->readMiscReg(
CSRData.at(CSR_MIP).physIndex) & CSRMasks.at(CSR_MIP);
// H mode CSR (to be implemented)
}
void
RemoteGDB::RiscvGdbRegCache::setRegs(ThreadContext *context) const
{
// NOTE: no error will be reported for attempting to set masked bits.
RegVal oldVal;
int mask;
RegVal newVal;
DPRINTF(GDBAcc, "setregs in remotegdb \n");
for (int i = 0; i < NumIntArchRegs; i++)
context->setIntReg(i, r.gpr[i]);
context->pcState(r.pc);
// Floating point registers
for (int i = 0; i < NumFloatRegs; i++)
context->setFloatReg(i, r.fpu[i]);
oldVal = context->readMiscRegNoEffect(
CSRData.at(CSR_FFLAGS).physIndex);
mask = CSRMasks.at(CSR_FFLAGS);
newVal = (oldVal & ~mask) | (r.fflags & mask);
context->setMiscRegNoEffect(
CSRData.at(CSR_FFLAGS).physIndex, newVal);
oldVal = context->readMiscRegNoEffect(
CSRData.at(CSR_FRM).physIndex);
mask = CSRMasks.at(CSR_FRM);
newVal = (oldVal & ~mask) | (r.frm & mask);
context->setMiscRegNoEffect(
CSRData.at(CSR_FRM).physIndex, newVal);
oldVal = context->readMiscRegNoEffect(
CSRData.at(CSR_FCSR).physIndex);
mask = CSRMasks.at(CSR_FCSR);
newVal = (oldVal & ~mask) | (r.fcsr & mask);
context->setMiscRegNoEffect(
CSRData.at(CSR_FCSR).physIndex, newVal);
// CSR registers
context->setMiscRegNoEffect(
CSRData.at(CSR_CYCLE).physIndex, r.cycle);
context->setMiscRegNoEffect(
CSRData.at(CSR_TIME).physIndex, r.time);
// U mode CSR
oldVal = context->readMiscRegNoEffect(
CSRData.at(CSR_USTATUS).physIndex);
mask = CSRMasks.at(CSR_USTATUS);
newVal = (oldVal & ~mask) | (r.ustatus & mask);
context->setMiscRegNoEffect(
CSRData.at(CSR_USTATUS).physIndex, newVal);
oldVal = context->readMiscReg(
CSRData.at(CSR_UIE).physIndex);
mask = CSRMasks.at(CSR_UIE);
newVal = (oldVal & ~mask) | (r.uie & mask);
context->setMiscReg(
CSRData.at(CSR_UIE).physIndex, newVal);
context->setMiscRegNoEffect(
CSRData.at(CSR_UTVEC).physIndex, r.utvec);
context->setMiscRegNoEffect(
CSRData.at(CSR_USCRATCH).physIndex, r.uscratch);
context->setMiscRegNoEffect(
CSRData.at(CSR_UEPC).physIndex, r.uepc);
context->setMiscRegNoEffect(
CSRData.at(CSR_UCAUSE).physIndex, r.ucause);
context->setMiscRegNoEffect(
CSRData.at(CSR_UTVAL).physIndex, r.utval);
oldVal = context->readMiscReg(
CSRData.at(CSR_UIP).physIndex);
mask = CSRMasks.at(CSR_UIP);
newVal = (oldVal & ~mask) | (r.uip & mask);
context->setMiscReg(
CSRData.at(CSR_UIP).physIndex, newVal);
// S mode CSR
oldVal = context->readMiscRegNoEffect(
CSRData.at(CSR_SSTATUS).physIndex);
mask = CSRMasks.at(CSR_SSTATUS);
newVal = (oldVal & ~mask) | (r.sstatus & mask);
context->setMiscRegNoEffect(
CSRData.at(CSR_SSTATUS).physIndex, newVal);
context->setMiscRegNoEffect(
CSRData.at(CSR_SEDELEG).physIndex, r.sedeleg);
context->setMiscRegNoEffect(
CSRData.at(CSR_SIDELEG).physIndex, r.sideleg);
oldVal = context->readMiscReg(
CSRData.at(CSR_SIE).physIndex);
mask = CSRMasks.at(CSR_SIE);
newVal = (oldVal & ~mask) | (r.sie & mask);
context->setMiscReg(
CSRData.at(CSR_SIE).physIndex, newVal);
context->setMiscRegNoEffect(
CSRData.at(CSR_STVEC).physIndex, r.stvec);
context->setMiscRegNoEffect(
CSRData.at(CSR_SCOUNTEREN).physIndex, r.scounteren);
context->setMiscRegNoEffect(
CSRData.at(CSR_SSCRATCH).physIndex, r.sscratch);
context->setMiscRegNoEffect(
CSRData.at(CSR_SEPC).physIndex, r.sepc);
context->setMiscRegNoEffect(
CSRData.at(CSR_SCAUSE).physIndex, r.scause);
context->setMiscRegNoEffect(
CSRData.at(CSR_STVAL).physIndex, r.stval);
oldVal = context->readMiscReg(
CSRData.at(CSR_SIP).physIndex);
mask = CSRMasks.at(CSR_SIP);
newVal = (oldVal & ~mask) | (r.sip & mask);
context->setMiscReg(
CSRData.at(CSR_SIP).physIndex, newVal);
context->setMiscRegNoEffect(
CSRData.at(CSR_SATP).physIndex, r.satp);
// M mode CSR
context->setMiscRegNoEffect(
CSRData.at(CSR_MVENDORID).physIndex, r.mvendorid);
context->setMiscRegNoEffect(
CSRData.at(CSR_MARCHID).physIndex, r.marchid);
context->setMiscRegNoEffect(
CSRData.at(CSR_MIMPID).physIndex, r.mimpid);
context->setMiscRegNoEffect(
CSRData.at(CSR_MHARTID).physIndex, r.mhartid);
oldVal = context->readMiscRegNoEffect(
CSRData.at(CSR_MSTATUS).physIndex);
mask = CSRMasks.at(CSR_MSTATUS);
newVal = (oldVal & ~mask) | (r.mstatus & mask);
context->setMiscRegNoEffect(
CSRData.at(CSR_MSTATUS).physIndex, newVal);
oldVal = context->readMiscRegNoEffect(
CSRData.at(CSR_MISA).physIndex);
mask = CSRMasks.at(CSR_MISA);
newVal = (oldVal & ~mask) | (r.misa & mask);
context->setMiscRegNoEffect(
CSRData.at(CSR_MISA).physIndex, newVal);
context->setMiscRegNoEffect(
CSRData.at(CSR_MEDELEG).physIndex, r.medeleg);
context->setMiscRegNoEffect(
CSRData.at(CSR_MIDELEG).physIndex, r.mideleg);
oldVal = context->readMiscReg(
CSRData.at(CSR_MIE).physIndex);
mask = CSRMasks.at(CSR_MIE);
newVal = (oldVal & ~mask) | (r.mie & mask);
context->setMiscReg(
CSRData.at(CSR_MIE).physIndex, newVal);
context->setMiscRegNoEffect(
CSRData.at(CSR_MTVEC).physIndex, r.mtvec);
context->setMiscRegNoEffect(
CSRData.at(CSR_MCOUNTEREN).physIndex, r.mcounteren);
context->setMiscRegNoEffect(
CSRData.at(CSR_MSCRATCH).physIndex, r.mscratch);
context->setMiscRegNoEffect(
CSRData.at(CSR_MEPC).physIndex, r.mepc);
context->setMiscRegNoEffect(
CSRData.at(CSR_MCAUSE).physIndex, r.mcause);
context->setMiscRegNoEffect(
CSRData.at(CSR_MTVAL).physIndex, r.mtval);
oldVal = context->readMiscReg(
CSRData.at(CSR_MIP).physIndex);
mask = CSRMasks.at(CSR_MIP);
newVal = (oldVal & ~mask) | (r.mip & mask);
context->setMiscReg(
CSRData.at(CSR_MIP).physIndex, newVal);
// H mode CSR (to be implemented)
}
bool
RemoteGDB::getXferFeaturesRead(const std::string &annex, std::string &output)
{
/**
* Blobs e.g. gdb_xml_riscv_target are generated by adding
* GdbXml(<xml_file_name>, <blob_name>) to src/arch/riscv/Sconscript.
*
* Import using #include blobs/<blob_name>.hh
*/
#define GDB_XML(x, s) \
{ \
x, std::string(reinterpret_cast<const char *>(Blobs::s), \
Blobs::s##_len) \
}
static const std::map<std::string, std::string> annexMap{
GDB_XML("target.xml", gdb_xml_riscv_target),
GDB_XML("riscv-64bit-cpu.xml", gdb_xml_riscv_cpu),
GDB_XML("riscv-64bit-fpu.xml", gdb_xml_riscv_fpu),
GDB_XML("riscv-64bit-csr.xml", gdb_xml_riscv_csr)};
#undef GDB_XML
auto it = annexMap.find(annex);
if (it == annexMap.end())
return false;
output = it->second;
return true;
}
BaseGdbRegCache *
RemoteGDB::gdbRegs()
{
return &regCache;
}
} // namespace gem5