power: Implement Remote GDB
This commit is contained in:
Boris Shingarov
parent
b48ed9b6c2
commit
58cb57bacc
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@ -47,6 +47,7 @@ if env['TARGET_ISA'] == 'power':
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Source('isa.cc')
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Source('pagetable.cc')
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Source('process.cc')
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Source('remote_gdb.cc')
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Source('stacktrace.cc')
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Source('tlb.cc')
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Source('utility.cc')
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237
src/arch/power/remote_gdb.cc
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237
src/arch/power/remote_gdb.cc
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@ -0,0 +1,237 @@
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/*
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* Copyright 2014 Google, Inc.
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* Copyright (c) 2010 ARM Limited
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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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* Copyright (c) 2002-2005 The Regents of The University of Michigan
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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: Nathan Binkert
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* William Wang
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* Deyuan Guo
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* Boris Shingarov
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*/
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/*
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* Copyright (c) 1990, 1993 The Regents of the University of California
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* All rights reserved
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratories.
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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
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* are met:
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* 1. 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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* 2. 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)kgdb_stub.c 8.4 (Berkeley) 1/12/94
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*/
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/*-
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* Copyright (c) 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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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
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* are met:
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* 1. 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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* 2. 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* $NetBSD: kgdb_stub.c,v 1.8 2001/07/07 22:58:00 wdk Exp $
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*
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* Taken from NetBSD
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*
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* "Stub" to allow remote cpu to debug over a serial line using gdb.
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*/
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#include "arch/power/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/power/vtophys.hh"
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#include "cpu/thread_state.hh"
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#include "debug/GDBAcc.hh"
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#include "debug/GDBMisc.hh"
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#include "sim/byteswap.hh"
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using namespace std;
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using namespace PowerISA;
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RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc)
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: BaseRemoteGDB(_system, tc, GDB_REG_BYTES)
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{
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}
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/*
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* Determine if the mapping at va..(va+len) is valid.
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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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TlbEntry entry;
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//Check to make sure the first byte is mapped into the processes address
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//space. At the time of this writing, the acc() check is used when
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//processing the MemR/MemW packets before actually asking the translating
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//port proxy to read/writeBlob. I (bgs) am not convinced the first byte
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//check is enough.
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if (FullSystem)
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panic("acc not implemented for POWER FS!");
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else
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return context->getProcessPtr()->pTable->lookup(va, entry);
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}
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/*
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* Translate the kernel debugger register format into the GDB register
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* format.
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*
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* The PowerPC ISA is quite flexible in what register sets may be present
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* depending on the features implemented by the particular CPU;
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* GDB addresses this by describing the format of how register contents
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* are transferred on the wire, in XML files such as 'power-core.xml'.
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* Ideally, we should be reading these files instead of hardcoding this
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* information, but for now the following implementation is enough to
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* serve as the RSP backend for the out-of-the-box, default GDB.
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*/
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void
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RemoteGDB::getregs()
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{
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DPRINTF(GDBAcc, "getregs in remotegdb \n");
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memset(gdbregs.regs, 0, gdbregs.bytes());
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// Default order on 32-bit PowerPC:
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// R0-R31 (32-bit each), F0-F31 (64-bit IEEE754 double),
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// PC, MSR, CR, LR, CTR, XER (32-bit each)
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// INTREG: R0~R31
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for (int i = 0; i < NumIntArchRegs; i++)
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gdbregs.regs32[GdbFirstGPRIndex + i] = htobe((uint32_t)context->readIntReg(i));
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// FLOATREG: F0~F31
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for (int i = 0; i < NumFloatArchRegs; i++)
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gdbregs.regs32[GdbFirstFPRIndex + i] = context->readFloatRegBits(i);
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// PC, MSR, CR, LR, CTR, XER
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gdbregs.regs32[GdbPCIndex] = htobe((uint32_t)context->pcState().pc());
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gdbregs.regs32[GdbMSRIndex] = 0; // Is MSR modeled?
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gdbregs.regs32[GdbCRIndex] = htobe((uint32_t)context->readIntReg(INTREG_CR));
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gdbregs.regs32[GdbLRIndex] = htobe((uint32_t)context->readIntReg(INTREG_LR));
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gdbregs.regs32[GdbCTRIndex] = htobe((uint32_t)context->readIntReg(INTREG_CTR));
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gdbregs.regs32[GdbXERIndex] = htobe((uint32_t)context->readIntReg(INTREG_XER));
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}
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/*
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* Translate the GDB register format into the kernel debugger register
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* format.
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*/
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void
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RemoteGDB::setregs()
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{
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DPRINTF(GDBAcc, "setregs in remotegdb \n");
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// INTREG: R0~R31
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for (int i = 0; i < NumIntArchRegs; i++)
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context->setIntReg(i, betoh(gdbregs.regs32[GdbFirstGPRIndex + i]));
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// FLOATREG: F0~F31
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for (int i = 0; i < NumFloatArchRegs; i++)
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context->setFloatRegBits(i, gdbregs.regs64[GdbFirstFPRIndex + i]);
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// PC, MSR, CR, LR, CTR, XER
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context->pcState(betoh(gdbregs.regs32[GdbPCIndex]));
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// Is MSR modeled?
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context->setIntReg(INTREG_CR, betoh(gdbregs.regs32[GdbCRIndex]));
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context->setIntReg(INTREG_LR, betoh(gdbregs.regs32[GdbLRIndex]));
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context->setIntReg(INTREG_CTR, betoh(gdbregs.regs32[GdbCTRIndex]));
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context->setIntReg(INTREG_XER, betoh(gdbregs.regs32[GdbXERIndex]));
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}
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@ -32,39 +32,42 @@
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* Timothy M. Jones
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*/
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#ifndef __ARCH_ARM_REMOTE_GDB_HH__
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#define __ARCH_ARM_REMOTE_GDB_HH__
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#ifndef __ARCH_POWER_REMOTE_GDB_HH__
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#define __ARCH_POWER_REMOTE_GDB_HH__
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#include "arch/power/registers.hh"
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#include "arch/power/remote_gdb.hh"
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#include "base/remote_gdb.hh"
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namespace PowerISA
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{
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const int GDB_REG_BYTES =
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NumIntArchRegs * 4 +
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NumFloatArchRegs * 8 +
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4 + /* PC */
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4 + /* MSR */
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4 + /* CR */
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4 + /* LR */
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4 + /* CTR */
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4; /* XER */
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const int GdbFirstGPRIndex = 0;
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const int GdbFirstFPRIndex = 16;
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const int GdbPCIndex = 96;
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const int GdbMSRIndex = 97;
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const int GdbCRIndex = 98;
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const int GdbLRIndex = 99;
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const int GdbCTRIndex = 100;
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const int GdbXERIndex = 101;
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class RemoteGDB : public BaseRemoteGDB
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{
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public:
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RemoteGDB(System *system, ThreadContext *context)
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: BaseRemoteGDB(system, context, 1)
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{
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}
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bool
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acc(Addr, size_t)
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{
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panic("acc not implemented for POWER!");
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}
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void
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getregs()
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{
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panic("getregs not implemented for POWER!");
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}
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void
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setregs()
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{
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panic("setregs not implemented for POWER!");
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}
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RemoteGDB(System *_system, ThreadContext *tc);
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protected:
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bool acc(Addr addr, size_t len);
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void getregs();
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void setregs();
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};
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} // namespace PowerISA
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