diff options
author | Andreas Sandberg <andreas.sandberg@arm.com> | 2016-06-20 14:39:49 +0100 |
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committer | Andreas Sandberg <andreas.sandberg@arm.com> | 2016-06-20 14:39:49 +0100 |
commit | 37bb0d0fb30a3548173253b0f19861a7ee4f8fce (patch) | |
tree | ee2e89b4a804e4bcaca76c0f38a359c1f5bab3c0 /src/kern/linux/events.hh | |
parent | 60fb5e79f358b7d0784e4cfae4df9ec196e47f19 (diff) | |
download | gem5-37bb0d0fb30a3548173253b0f19861a7ee4f8fce.tar.xz |
kern, arm: Dump dmesg on kernel panic/oops
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>
Diffstat (limited to 'src/kern/linux/events.hh')
-rw-r--r-- | src/kern/linux/events.hh | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/kern/linux/events.hh b/src/kern/linux/events.hh index 3f5f2526f..b8aad9d79 100644 --- a/src/kern/linux/events.hh +++ b/src/kern/linux/events.hh @@ -1,4 +1,16 @@ /* + * Copyright (c) 2016 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) 2004-2006 The Regents of The University of Michigan * All rights reserved. * @@ -44,6 +56,46 @@ class DebugPrintkEvent : public SkipFuncEvent virtual void process(ThreadContext *xc); }; +/** + * Dump the guest kernel's dmesg buffer to a file in gem5's output + * directory and print a warning. + * + * @warn This event uses Linux::dumpDmesg() and comes with the same + * limitations. Most importantly, the kernel's address mappings must + * be available to the translating proxy. + */ +class DmesgDumpEvent : public PCEvent +{ + protected: + std::string fname; + + public: + DmesgDumpEvent(PCEventQueue *q, const std::string &desc, Addr addr, + const std::string &_fname) + : PCEvent(q, desc, addr), fname(_fname) {} + virtual void process(ThreadContext *xc); +}; + +/** + * Dump the guest kernel's dmesg buffer to a file in gem5's output + * directory and panic. + * + * @warn This event uses Linux::dumpDmesg() and comes with the same + * limitations. Most importantly, the kernel's address mappings must + * be available to the translating proxy. + */ +class KernelPanicEvent : public PCEvent +{ + protected: + std::string fname; + + public: + KernelPanicEvent(PCEventQueue *q, const std::string &desc, Addr addr, + const std::string &_fname) + : PCEvent(q, desc, addr), fname(_fname) {} + virtual void process(ThreadContext *xc); +}; + /** A class to skip udelay() and related calls in the kernel. * This class has two additional parameters that take the argument to udelay and * manipulated it to come up with ns and eventually ticks to quiesce for. |