diff options
| -rw-r--r-- | src/arch/power/SConscript | 1 | ||||
| -rw-r--r-- | src/arch/power/remote_gdb.cc | 237 | ||||
| -rw-r--r-- | src/arch/power/remote_gdb.hh | 51 |
3 files changed, 265 insertions, 24 deletions
diff --git a/src/arch/power/SConscript b/src/arch/power/SConscript index 785a9a76f..c49fab649 100644 --- a/src/arch/power/SConscript +++ b/src/arch/power/SConscript @@ -47,6 +47,7 @@ if env['TARGET_ISA'] == 'power': Source('isa.cc') Source('pagetable.cc') Source('process.cc') + Source('remote_gdb.cc') Source('stacktrace.cc') Source('tlb.cc') Source('utility.cc') diff --git a/src/arch/power/remote_gdb.cc b/src/arch/power/remote_gdb.cc new file mode 100644 index 000000000..b8a1592b6 --- /dev/null +++ b/src/arch/power/remote_gdb.cc @@ -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])); +} diff --git a/src/arch/power/remote_gdb.hh b/src/arch/power/remote_gdb.hh index fa82af95b..aea75528e 100644 --- a/src/arch/power/remote_gdb.hh +++ b/src/arch/power/remote_gdb.hh @@ -32,39 +32,42 @@ * Timothy M. Jones */ -#ifndef __ARCH_ARM_REMOTE_GDB_HH__ -#define __ARCH_ARM_REMOTE_GDB_HH__ +#ifndef __ARCH_POWER_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" 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 { public: - RemoteGDB(System *system, ThreadContext *context) - : BaseRemoteGDB(system, context, 1) - { - } - - 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!"); - } + RemoteGDB(System *_system, ThreadContext *tc); + protected: + bool acc(Addr addr, size_t len); + void getregs(); + void setregs(); }; } // namespace PowerISA |