255 lines
9.8 KiB
C++
255 lines
9.8 KiB
C++
/*
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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 <sys/signal.h>
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#include <unistd.h>
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#include <string>
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#include "arch/sparc/remote_gdb.hh"
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#include "arch/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 "config/full_system.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/GDBRead.hh"
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#include "mem/page_table.hh"
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#include "mem/physical.hh"
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#include "mem/port.hh"
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#include "sim/byteswap.hh"
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#include "sim/process.hh"
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#include "sim/system.hh"
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using namespace std;
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using namespace SparcISA;
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RemoteGDB::RemoteGDB(System *_system, ThreadContext *c)
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: BaseRemoteGDB(_system, c, NumGDBRegs), nextBkpt(0)
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{}
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///////////////////////////////////////////////////////////
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// RemoteGDB::acc
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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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//@Todo In NetBSD, this function checks if all addresses
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// from va to va + len have valid page map entries. Not
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// sure how this will work for other OSes or in general.
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#if FULL_SYSTEM
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if (va)
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return true;
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return false;
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#else
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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.
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if (context->getProcessPtr()->pTable->lookup(va, entry))
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return true;
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return false;
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#endif
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}
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///////////////////////////////////////////////////////////
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// RemoteGDB::getregs
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//
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// Translate the kernel debugger register format into
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// the GDB register format.
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void
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RemoteGDB::getregs()
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{
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memset(gdbregs.regs, 0, gdbregs.size);
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PCState pc = context->pcState();
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if (context->readMiscReg(MISCREG_PSTATE) &
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PSTATE::am) {
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uint32_t *regs;
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regs = (uint32_t*)gdbregs.regs;
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regs[Reg32Pc] = htobe((uint32_t)pc.pc());
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regs[Reg32Npc] = htobe((uint32_t)pc.npc());
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for (int x = RegG0; x <= RegI0 + 7; x++)
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regs[x] = htobe((uint32_t)context->readIntReg(x - RegG0));
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regs[Reg32Y] = htobe((uint32_t)context->readIntReg(NumIntArchRegs + 1));
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regs[Reg32Psr] = htobe((uint32_t)context->readMiscReg(MISCREG_PSTATE));
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regs[Reg32Fsr] = htobe((uint32_t)context->readMiscReg(MISCREG_FSR));
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regs[Reg32Csr] = htobe((uint32_t)context->readIntReg(NumIntArchRegs + 2));
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} else {
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gdbregs.regs[RegPc] = htobe(pc.pc());
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gdbregs.regs[RegNpc] = htobe(pc.npc());
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for (int x = RegG0; x <= RegI0 + 7; x++)
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gdbregs.regs[x] = htobe(context->readIntReg(x - RegG0));
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gdbregs.regs[RegFsr] = htobe(context->readMiscReg(MISCREG_FSR));
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gdbregs.regs[RegFprs] = htobe(context->readMiscReg(MISCREG_FPRS));
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gdbregs.regs[RegY] = htobe(context->readIntReg(NumIntArchRegs + 1));
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gdbregs.regs[RegState] = htobe(
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context->readMiscReg(MISCREG_CWP) |
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context->readMiscReg(MISCREG_PSTATE) << 8 |
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context->readMiscReg(MISCREG_ASI) << 24 |
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context->readIntReg(NumIntArchRegs + 2) << 32);
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}
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DPRINTF(GDBRead, "PC=%#x\n", gdbregs.regs[RegPc]);
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// Floating point registers are left at 0 in netbsd
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// All registers other than the pc, npc and int regs
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// are ignored as well.
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}
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///////////////////////////////////////////////////////////
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// RemoteGDB::setregs
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//
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// Translate the GDB register format into the kernel
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// debugger register format.
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//
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void
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RemoteGDB::setregs()
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{
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PCState pc;
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pc.pc(gdbregs.regs[RegPc]);
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pc.npc(gdbregs.regs[RegNpc]);
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pc.nnpc(pc.npc() + sizeof(MachInst));
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pc.upc(0);
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pc.nupc(1);
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context->pcState(pc);
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for (int x = RegG0; x <= RegI0 + 7; x++)
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context->setIntReg(x - RegG0, gdbregs.regs[x]);
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// Only the integer registers, pc and npc are set in netbsd
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}
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void
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RemoteGDB::clearSingleStep()
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{
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if (nextBkpt)
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clearTempBreakpoint(nextBkpt);
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}
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void
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RemoteGDB::setSingleStep()
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{
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nextBkpt = context->pcState().npc();
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setTempBreakpoint(nextBkpt);
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}
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