diff options
author | Alec Roelke <ar4jc@virginia.edu> | 2017-03-21 12:54:50 -0400 |
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committer | Alec Roelke <ar4jc@virginia.edu> | 2017-04-05 20:21:45 +0000 |
commit | 616d48a570296f3d6eb38e5ce5e6fe41facf1a29 (patch) | |
tree | 62f4ae2782d9ff1c4f43ce3abcf190113ee0e8bb /src/arch/riscv/remote_gdb.cc | |
parent | cd06bcf4ec2443eb719410e7e496e3d9d4d479c9 (diff) | |
download | gem5-616d48a570296f3d6eb38e5ce5e6fe41facf1a29.tar.xz |
riscv: add remote gdb support
This patch adds support for debugging with remote GDB to RISC-V. Using
GDB compiled with the RISC-V GNU toolchain, it is possible to pause
and continue execution, view debugging information, etc. As with the
rest of RISC-V, this does not support full-system mode.
Change-Id: I2d3a8be614725e1be4b4c283f9fb678a0a30578d
Reviewed-on: https://gem5-review.googlesource.com/2304
Maintainer: Alec Roelke <ar4jc@virginia.edu>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Diffstat (limited to 'src/arch/riscv/remote_gdb.cc')
-rw-r--r-- | src/arch/riscv/remote_gdb.cc | 180 |
1 files changed, 157 insertions, 23 deletions
diff --git a/src/arch/riscv/remote_gdb.cc b/src/arch/riscv/remote_gdb.cc index 64735d0b4..2b508762d 100644 --- a/src/arch/riscv/remote_gdb.cc +++ b/src/arch/riscv/remote_gdb.cc @@ -1,8 +1,20 @@ /* + * Copyright 2015 LabWare + * 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) 2017 The University of Virginia * Copyright (c) 2002-2005 The Regents of The University of Michigan - * Copyright (c) 2007-2008 The Florida State University - * Copyright (c) 2009 The University of Edinburgh - * Copyright (c) 2015 Sven Karlsson * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -29,43 +41,165 @@ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Authors: Nathan Binkert - * Stephen Hines - * Timothy M. Jones - * Sven Karlsson + * William Wang + * Deyuan Guo + * Boris Shingarov + * Alec Roelke + */ + +/* + * 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. */ - #include "base/remote_gdb.hh" - #include "arch/riscv/remote_gdb.hh" - #include "sim/system.hh" +/* + * $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/registers.hh" +#include "cpu/thread_state.hh" +#include "debug/GDBAcc.hh" +#include "mem/page_table.hh" +#include "sim/full_system.hh" using namespace std; using namespace RiscvISA; -RemoteGDB::RemoteGDB(System *system, ThreadContext *context) - : BaseRemoteGDB(system, context) +RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc) + : BaseRemoteGDB(_system, tc) { } -RemoteGDB::BaseGdbRegCache* -RemoteGDB::gdbRegs() -{ - panic("gdbRegs not implemented for Riscv!"); -} - bool -RemoteGDB::acc(Addr, size_t) +RemoteGDB::acc(Addr va, size_t len) { - panic("acc not implemented for Riscv!"); + TlbEntry entry; + if (FullSystem) + panic("acc not implemented for RISCV FS!"); + else + return context->getProcessPtr()->pTable->lookup(va, entry); } void -RemoteGDB::getregs() +RemoteGDB::RiscvGdbRegCache::getRegs(ThreadContext *context) { - panic("getregs not implemented for Riscv!"); + DPRINTF(GDBAcc, "getregs in remotegdb, size %lu\n", size()); + for (int i = 0; i < NumIntArchRegs; i++) + r.gpr[i] = context->readIntReg(i); + r.pc = context->pcState().pc(); + for (int i = 0; i < NumFloatRegs; i++) + r.fpr[i] = context->readFloatRegBits(i); + + r.csr_base = context->readMiscReg(0); + r.fflags = context->readMiscReg(MISCREG_FFLAGS); + r.frm = context->readMiscReg(MISCREG_FRM); + r.fcsr = context->readMiscReg(MISCREG_FCSR); + for (int i = ExplicitCSRs; i < NumMiscRegs; i++) + r.csr[i - ExplicitCSRs] = context->readMiscReg(i); } void -RemoteGDB::setregs() +RemoteGDB::RiscvGdbRegCache::setRegs(ThreadContext *context) const { - panic("setregs not implemented for Riscv!"); + DPRINTF(GDBAcc, "setregs in remotegdb \n"); + for (int i = 0; i < NumIntArchRegs; i++) + context->setIntReg(i, r.gpr[i]); + context->pcState(r.pc); + for (int i = 0; i < NumFloatRegs; i++) + context->setFloatRegBits(i, r.fpr[i]); + + context->setMiscReg(0, r.csr_base); + context->setMiscReg(MISCREG_FFLAGS, r.fflags); + context->setMiscReg(MISCREG_FRM, r.frm); + context->setMiscReg(MISCREG_FCSR, r.fcsr); + for (int i = ExplicitCSRs; i < NumMiscRegs; i++) + context->setMiscReg(i, r.csr[i - ExplicitCSRs]); +} + +RemoteGDB::BaseGdbRegCache* +RemoteGDB::gdbRegs() { + return new RiscvGdbRegCache(this); } |