37bb0d0fb3
Add helper functions to dump the guest kernel's dmesg buffer to a text file in m5out. This functionality is split into two parts. First, a dmesg dump function that can be used in other places: void Linux::dumpDmesg(ThreadContext *, std::ostream &) This function is used to implement two PCEvents: DmesgDumpEvent and KernelPanic event. The only difference between the two is that the latter produces a gem5 panic instead of a warning in addition to dumping the kernel log. Change-Id: I6d2af1d666ace57124089648ea906f6c787ac63c Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Reviewed-by: Gabor Dozsa <gabor.dozsa@arm.com>
129 lines
4.8 KiB
C++
129 lines
4.8 KiB
C++
/*
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* Copyright (c) 2016 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) 2004-2006 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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* Ali Saidi
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*/
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#ifndef __KERN_LINUX_EVENTS_HH__
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#define __KERN_LINUX_EVENTS_HH__
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#include "kern/system_events.hh"
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namespace Linux {
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class DebugPrintkEvent : public SkipFuncEvent
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{
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public:
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DebugPrintkEvent(PCEventQueue *q, const std::string &desc, Addr addr)
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: SkipFuncEvent(q, desc, addr) {}
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virtual void process(ThreadContext *xc);
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};
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/**
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* Dump the guest kernel's dmesg buffer to a file in gem5's output
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* directory and print a warning.
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*
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* @warn This event uses Linux::dumpDmesg() and comes with the same
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* limitations. Most importantly, the kernel's address mappings must
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* be available to the translating proxy.
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*/
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class DmesgDumpEvent : public PCEvent
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{
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protected:
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std::string fname;
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public:
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DmesgDumpEvent(PCEventQueue *q, const std::string &desc, Addr addr,
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const std::string &_fname)
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: PCEvent(q, desc, addr), fname(_fname) {}
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virtual void process(ThreadContext *xc);
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};
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/**
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* Dump the guest kernel's dmesg buffer to a file in gem5's output
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* directory and panic.
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*
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* @warn This event uses Linux::dumpDmesg() and comes with the same
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* limitations. Most importantly, the kernel's address mappings must
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* be available to the translating proxy.
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*/
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class KernelPanicEvent : public PCEvent
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{
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protected:
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std::string fname;
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public:
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KernelPanicEvent(PCEventQueue *q, const std::string &desc, Addr addr,
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const std::string &_fname)
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: PCEvent(q, desc, addr), fname(_fname) {}
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virtual void process(ThreadContext *xc);
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};
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/** A class to skip udelay() and related calls in the kernel.
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* This class has two additional parameters that take the argument to udelay and
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* manipulated it to come up with ns and eventually ticks to quiesce for.
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* See descriptions of argDivToNs and argMultToNs below.
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*/
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class UDelayEvent : public SkipFuncEvent
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{
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private:
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/** value to divide arg by to create ns. This is present beacues the linux
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* kernel code sometime precomputes the first multiply that is done in
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* udelay() if the parameter is a constant. We need to undo it so here is
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* how. */
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uint64_t argDivToNs;
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/** value to multiple arg by to create ns. Nominally, this is 1000 to
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* convert us to ns, but since linux can do some preprocessing of constant
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* values something else might be required. */
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uint64_t argMultToNs;
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public:
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UDelayEvent(PCEventQueue *q, const std::string &desc, Addr addr,
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uint64_t mult, uint64_t div)
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: SkipFuncEvent(q, desc, addr), argDivToNs(div), argMultToNs(mult) {}
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virtual void process(ThreadContext *xc);
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};
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}
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#endif
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