277 lines
9.7 KiB
C++
277 lines
9.7 KiB
C++
/*
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* Copyright 2014 Google, Inc.
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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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*/
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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/alpha/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/alpha/decoder.hh"
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#include "arch/alpha/regredir.hh"
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#include "arch/alpha/utility.hh"
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#include "arch/alpha/vtophys.hh"
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#include "base/intmath.hh"
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#include "base/remote_gdb.hh"
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#include "base/socket.hh"
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#include "base/trace.hh"
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#include "cpu/static_inst.hh"
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#include "cpu/thread_context.hh"
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#include "debug/GDBAcc.hh"
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#include "debug/GDBMisc.hh"
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#include "mem/physical.hh"
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#include "mem/port.hh"
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#include "sim/full_system.hh"
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#include "sim/system.hh"
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using namespace std;
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using namespace AlphaISA;
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RemoteGDB::RemoteGDB(System *_system, ThreadContext *tc)
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: BaseRemoteGDB(_system, tc)
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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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if (!FullSystem)
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panic("acc function needs to be rewritten for SE mode\n");
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Addr last_va;
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va = TruncPage(va);
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last_va = RoundPage(va + len);
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do {
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if (IsK0Seg(va)) {
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if (va < (K0SegBase + system->memSize())) {
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DPRINTF(GDBAcc, "acc: Mapping is valid K0SEG <= "
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"%#x < K0SEG + size\n", va);
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return true;
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} else {
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DPRINTF(GDBAcc, "acc: Mapping invalid %#x "
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"> K0SEG + size\n", va);
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return false;
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}
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}
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/**
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* This code says that all accesses to palcode (instruction
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* and data) are valid since there isn't a va->pa mapping
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* because palcode is accessed physically. At some point this
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* should probably be cleaned up but there is no easy way to
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* do it.
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*/
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if (PcPAL(va) || va < 0x10000)
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return true;
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Addr ptbr = context->readMiscRegNoEffect(IPR_PALtemp20);
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PageTableEntry pte =
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kernel_pte_lookup(context->getPhysProxy(), ptbr, va);
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if (!pte.valid()) {
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DPRINTF(GDBAcc, "acc: %#x pte is invalid\n", va);
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return false;
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}
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va += PageBytes;
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} while (va < last_va);
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DPRINTF(GDBAcc, "acc: %#x mapping is valid\n", va);
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return true;
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}
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void
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RemoteGDB::AlphaGdbRegCache::getRegs(ThreadContext *context)
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{
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DPRINTF(GDBAcc, "getRegs in remotegdb \n");
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r.pc = context->pcState().pc();
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if (PcPAL(r.pc)) {
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for (int i = 0; i < 32; ++i)
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r.gpr[i] = context->readIntReg(reg_redir[i]);
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} else {
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for (int i = 0; i < 32; ++i)
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r.gpr[i] = context->readIntReg(i);
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}
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for (int i = 0; i < 32; ++i)
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#ifdef KGDB_FP_REGS
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r.fpr[i] = context->readFloatRegBits(i);
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#else
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r.fpr[i] = 0;
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#endif
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}
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void
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RemoteGDB::AlphaGdbRegCache::setRegs(ThreadContext *context) const
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{
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DPRINTF(GDBAcc, "setRegs in remotegdb \n");
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if (PcPAL(r.pc)) {
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for (int i = 0; i < 32; ++i) {
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context->setIntReg(reg_redir[i], r.gpr[i]);
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}
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} else {
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for (int i = 0; i < 32; ++i) {
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context->setIntReg(i, r.gpr[i]);
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}
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}
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#ifdef KGDB_FP_REGS
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for (int i = 0; i < NumFloatArchRegs; ++i) {
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context->setFloatRegBits(i, gdbregs.regs64[i + KGDB_REG_F0]);
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}
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#endif
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context->pcState(r.pc);
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}
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// Write bytes to kernel address space for debugger.
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bool
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RemoteGDB::write(Addr vaddr, size_t size, const char *data)
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{
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if (BaseRemoteGDB::write(vaddr, size, data)) {
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#ifdef IMB
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alpha_pal_imb();
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#endif
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return true;
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} else {
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return false;
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}
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}
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bool
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RemoteGDB::insertHardBreak(Addr addr, size_t len)
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{
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warn_once("Breakpoints do not work in Alpha PAL mode.\n"
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" See PCEventQueue::doService() in cpu/pc_event.cc.\n");
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return BaseRemoteGDB::insertHardBreak(addr, len);
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}
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RemoteGDB::BaseGdbRegCache*
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RemoteGDB::gdbRegs() {
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return new AlphaGdbRegCache(this);
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}
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