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author | Giacomo Travaglini <giacomo.travaglini@arm.com> | 2018-03-14 17:25:12 +0000 |
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committer | Giacomo Travaglini <giacomo.travaglini@arm.com> | 2018-04-06 10:10:10 +0000 |
commit | 2d1add2d5d6b49a0eac1ef9180786fe28d207098 (patch) | |
tree | a866c99a3f0b512d57966cec239c1faa3cad29fc /src/arch/arm/tracers/tarmac_base.cc | |
parent | d251fab8514f7a209044b69688aa3615f112e57d (diff) | |
download | gem5-2d1add2d5d6b49a0eac1ef9180786fe28d207098.tar.xz |
arch-arm: Add support for Tarmac trace-based simulation
A new InstTracer (TarmacParser) has been implemented. This tracer is
parsing a pre-existing Tarmac trace file [1] while gem5 is running; it
is comparing execution data together with trace data and it is dumping
differences.
This allows to use Tarmac format as a glue between heterogeneous
simuators speaking the same Tarmac language.
Kudos to Giacomo Gabrielli for writing the original tracer.
[1]: https://developer.arm.com/docs/dui0845/f/tarmac-trace-file-format
Change-Id: I9b92204a149813166166adba4a7c61a248bdcac3
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/9381
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
Diffstat (limited to 'src/arch/arm/tracers/tarmac_base.cc')
-rw-r--r-- | src/arch/arm/tracers/tarmac_base.cc | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/arch/arm/tracers/tarmac_base.cc b/src/arch/arm/tracers/tarmac_base.cc new file mode 100644 index 000000000..79e951ab5 --- /dev/null +++ b/src/arch/arm/tracers/tarmac_base.cc @@ -0,0 +1,116 @@ +/* + * Copyright (c) 2017-2018 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. + * + * 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: Giacomo Travaglini + */ + +#include "arch/arm/tracers/tarmac_base.hh" + +#include <algorithm> +#include <string> + +#include "config/the_isa.hh" +#include "cpu/reg_class.hh" +#include "cpu/static_inst.hh" +#include "cpu/thread_context.hh" + +using namespace TheISA; + +namespace Trace { + +TarmacBaseRecord::TarmacBaseRecord(Tick _when, ThreadContext *_thread, + const StaticInstPtr _staticInst, + PCState _pc, + const StaticInstPtr _macroStaticInst) + : InstRecord(_when, _thread, _staticInst, _pc, _macroStaticInst) +{ +} + +TarmacBaseRecord::InstEntry::InstEntry( + ThreadContext* thread, + PCState pc, + const StaticInstPtr staticInst, + bool predicate) + : taken(predicate) , + addr(pc.instAddr()) , + opcode(staticInst->machInst & 0xffffffff), + disassemble(staticInst->disassemble(addr)), + isetstate(pcToISetState(pc)), + mode(MODE_USER) +{ + + // Operating mode gained by reading the architectural register (CPSR) + const CPSR cpsr = thread->readMiscRegNoEffect(MISCREG_CPSR); + mode = (OperatingMode) (uint8_t)cpsr.mode; + + // In Tarmac, instruction names are printed in capital + // letters. + std::for_each(disassemble.begin(), disassemble.end(), + [](char& c) { c = toupper(c); }); +} + +TarmacBaseRecord::RegEntry::RegEntry(PCState pc) + : isetstate(pcToISetState(pc)) +{ +} + +TarmacBaseRecord::MemEntry::MemEntry ( + uint8_t _size, + Addr _addr, + uint64_t _data) + : size(_size), addr(_addr), data(_data) +{ +} + +TarmacBaseRecord::ISetState +TarmacBaseRecord::pcToISetState(PCState pc) +{ + TarmacBaseRecord::ISetState isetstate; + + if (pc.aarch64()) + isetstate = TarmacBaseRecord::ISET_A64; + else if (!pc.thumb() && !pc.jazelle()) + isetstate = TarmacBaseRecord::ISET_ARM; + else if (pc.thumb() && !pc.jazelle()) + isetstate = TarmacBaseRecord::ISET_THUMB; + else + // No Jazelle state in TARMAC + isetstate = TarmacBaseRecord::ISET_UNSUPPORTED; + + return isetstate; +} + +} // namespace Trace |