power: Implement Remote GDB

This commit is contained in:
Boris Shingarov 2015-10-25 16:01:52 -07:00
parent b48ed9b6c2
commit 58cb57bacc
3 changed files with 265 additions and 24 deletions

View file

@ -47,6 +47,7 @@ if env['TARGET_ISA'] == 'power':
Source('isa.cc') Source('isa.cc')
Source('pagetable.cc') Source('pagetable.cc')
Source('process.cc') Source('process.cc')
Source('remote_gdb.cc')
Source('stacktrace.cc') Source('stacktrace.cc')
Source('tlb.cc') Source('tlb.cc')
Source('utility.cc') Source('utility.cc')

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@ -0,0 +1,237 @@
/*
* Copyright 2014 Google, Inc.
* Copyright (c) 2010 ARM Limited
* 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) 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.
*
* Authors: Nathan Binkert
* William Wang
* Deyuan Guo
* Boris Shingarov
*/
/*
* 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/power/remote_gdb.hh"
#include <sys/signal.h>
#include <unistd.h>
#include <string>
#include "arch/power/vtophys.hh"
#include "cpu/thread_state.hh"
#include "debug/GDBAcc.hh"
#include "debug/GDBMisc.hh"
#include "sim/byteswap.hh"
using namespace std;
using namespace PowerISA;
RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc)
: BaseRemoteGDB(_system, tc, GDB_REG_BYTES)
{
}
/*
* Determine if the mapping at va..(va+len) is valid.
*/
bool
RemoteGDB::acc(Addr va, size_t len)
{
TlbEntry entry;
//Check to make sure the first byte is mapped into the processes address
//space. At the time of this writing, the acc() check is used when
//processing the MemR/MemW packets before actually asking the translating
//port proxy to read/writeBlob. I (bgs) am not convinced the first byte
//check is enough.
if (FullSystem)
panic("acc not implemented for POWER FS!");
else
return context->getProcessPtr()->pTable->lookup(va, entry);
}
/*
* Translate the kernel debugger register format into the GDB register
* format.
*
* The PowerPC ISA is quite flexible in what register sets may be present
* depending on the features implemented by the particular CPU;
* GDB addresses this by describing the format of how register contents
* are transferred on the wire, in XML files such as 'power-core.xml'.
* Ideally, we should be reading these files instead of hardcoding this
* information, but for now the following implementation is enough to
* serve as the RSP backend for the out-of-the-box, default GDB.
*/
void
RemoteGDB::getregs()
{
DPRINTF(GDBAcc, "getregs in remotegdb \n");
memset(gdbregs.regs, 0, gdbregs.bytes());
// Default order on 32-bit PowerPC:
// R0-R31 (32-bit each), F0-F31 (64-bit IEEE754 double),
// PC, MSR, CR, LR, CTR, XER (32-bit each)
// INTREG: R0~R31
for (int i = 0; i < NumIntArchRegs; i++)
gdbregs.regs32[GdbFirstGPRIndex + i] = htobe((uint32_t)context->readIntReg(i));
// FLOATREG: F0~F31
for (int i = 0; i < NumFloatArchRegs; i++)
gdbregs.regs32[GdbFirstFPRIndex + i] = context->readFloatRegBits(i);
// PC, MSR, CR, LR, CTR, XER
gdbregs.regs32[GdbPCIndex] = htobe((uint32_t)context->pcState().pc());
gdbregs.regs32[GdbMSRIndex] = 0; // Is MSR modeled?
gdbregs.regs32[GdbCRIndex] = htobe((uint32_t)context->readIntReg(INTREG_CR));
gdbregs.regs32[GdbLRIndex] = htobe((uint32_t)context->readIntReg(INTREG_LR));
gdbregs.regs32[GdbCTRIndex] = htobe((uint32_t)context->readIntReg(INTREG_CTR));
gdbregs.regs32[GdbXERIndex] = htobe((uint32_t)context->readIntReg(INTREG_XER));
}
/*
* Translate the GDB register format into the kernel debugger register
* format.
*/
void
RemoteGDB::setregs()
{
DPRINTF(GDBAcc, "setregs in remotegdb \n");
// INTREG: R0~R31
for (int i = 0; i < NumIntArchRegs; i++)
context->setIntReg(i, betoh(gdbregs.regs32[GdbFirstGPRIndex + i]));
// FLOATREG: F0~F31
for (int i = 0; i < NumFloatArchRegs; i++)
context->setFloatRegBits(i, gdbregs.regs64[GdbFirstFPRIndex + i]);
// PC, MSR, CR, LR, CTR, XER
context->pcState(betoh(gdbregs.regs32[GdbPCIndex]));
// Is MSR modeled?
context->setIntReg(INTREG_CR, betoh(gdbregs.regs32[GdbCRIndex]));
context->setIntReg(INTREG_LR, betoh(gdbregs.regs32[GdbLRIndex]));
context->setIntReg(INTREG_CTR, betoh(gdbregs.regs32[GdbCTRIndex]));
context->setIntReg(INTREG_XER, betoh(gdbregs.regs32[GdbXERIndex]));
}

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@ -32,39 +32,42 @@
* Timothy M. Jones * Timothy M. Jones
*/ */
#ifndef __ARCH_ARM_REMOTE_GDB_HH__ #ifndef __ARCH_POWER_REMOTE_GDB_HH__
#define __ARCH_ARM_REMOTE_GDB_HH__ #define __ARCH_POWER_REMOTE_GDB_HH__
#include "arch/power/registers.hh"
#include "arch/power/remote_gdb.hh"
#include "base/remote_gdb.hh" #include "base/remote_gdb.hh"
namespace PowerISA namespace PowerISA
{ {
const int GDB_REG_BYTES =
NumIntArchRegs * 4 +
NumFloatArchRegs * 8 +
4 + /* PC */
4 + /* MSR */
4 + /* CR */
4 + /* LR */
4 + /* CTR */
4; /* XER */
const int GdbFirstGPRIndex = 0;
const int GdbFirstFPRIndex = 16;
const int GdbPCIndex = 96;
const int GdbMSRIndex = 97;
const int GdbCRIndex = 98;
const int GdbLRIndex = 99;
const int GdbCTRIndex = 100;
const int GdbXERIndex = 101;
class RemoteGDB : public BaseRemoteGDB class RemoteGDB : public BaseRemoteGDB
{ {
public: public:
RemoteGDB(System *system, ThreadContext *context) RemoteGDB(System *_system, ThreadContext *tc);
: BaseRemoteGDB(system, context, 1) protected:
{ bool acc(Addr addr, size_t len);
} void getregs();
void setregs();
bool
acc(Addr, size_t)
{
panic("acc not implemented for POWER!");
}
void
getregs()
{
panic("getregs not implemented for POWER!");
}
void
setregs()
{
panic("setregs not implemented for POWER!");
}
}; };
} // namespace PowerISA } // namespace PowerISA