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/*
* 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_record.hh"
#include "arch/arm/insts/static_inst.hh"
#include "tarmac_tracer.hh"
namespace Trace {
// TARMAC Instruction Record static variables
uint64_t TarmacTracerRecord::TraceInstEntry::instCount = 0;
std::string
iSetStateToStr(TarmacBaseRecord::ISetState isetstate)
{
switch (isetstate) {
case TarmacBaseRecord::ISET_ARM:
return "A";
case TarmacBaseRecord::ISET_THUMB:
return "T";
case TarmacBaseRecord::ISET_A64:
return "O";
default:
return "Unsupported";
}
}
std::string
opModeToStr(OperatingMode opMode)
{
switch (opMode) {
case MODE_EL0T:
return "EL0t";
case MODE_EL1T:
return "EL1t";
case MODE_EL1H:
return "EL1h";
case MODE_EL2T:
return "EL2t";
case MODE_EL2H:
return "EL2h";
case MODE_EL3T:
return "EL3t";
case MODE_EL3H:
return "EL3h";
case MODE_USER:
return "usr";
case MODE_FIQ:
return "fiq";
case MODE_IRQ:
return "irq";
case MODE_SVC:
return "svc";
case MODE_MON:
return "mon";
case MODE_ABORT:
return "abt";
case MODE_HYP:
return "hyp";
case MODE_UNDEFINED:
return "und";
case MODE_SYSTEM:
return "sys";
default:
return "Unsupported";
}
}
// TarmacTracerRecord ctor
TarmacTracerRecord::TarmacTracerRecord(Tick _when, ThreadContext *_thread,
const StaticInstPtr _staticInst,
PCState _pc,
TarmacTracer& _tracer,
const StaticInstPtr _macroStaticInst)
: TarmacBaseRecord(_when, _thread, _staticInst,
_pc, _macroStaticInst),
tracer(_tracer)
{
}
TarmacTracerRecord::TraceInstEntry::TraceInstEntry(
const TarmacContext& tarmCtx,
bool predicate)
: InstEntry(tarmCtx.thread, tarmCtx.pc, tarmCtx.staticInst, predicate)
{
secureMode = inSecureState(tarmCtx.thread);
auto arm_inst = static_cast<const ArmStaticInst*>(
tarmCtx.staticInst.get()
);
// Get the instruction size as a number of bits:
// (multiply byte size by 8)
instSize = (arm_inst->instSize() << 3);
// Mask the opcode using the instruction size: the
// opcode field will otherwise be 32 bit wide even
// for 16bit (Thumb) instruction.
opcode = arm_inst->encoding();
// Update the instruction count: number of executed
// instructions.
instCount++;
}
TarmacTracerRecord::TraceMemEntry::TraceMemEntry(
const TarmacContext& tarmCtx,
uint8_t _size, Addr _addr, uint64_t _data)
: MemEntry(_size, _addr, _data),
loadAccess(tarmCtx.staticInst->isLoad())
{
}
TarmacTracerRecord::TraceRegEntry::TraceRegEntry(
const TarmacContext& tarmCtx,
const RegId& reg)
: RegEntry(tarmCtx.pc),
regValid(false),
regClass(reg.classValue()),
regRel(reg.index())
{
}
void
TarmacTracerRecord::TraceRegEntry::update(
const TarmacContext& tarmCtx
)
{
// Fill the register entry data, according to register
// class.
switch (regClass) {
case CCRegClass:
updateCC(tarmCtx, regRel);
break;
case FloatRegClass:
updateFloat(tarmCtx, regRel);
break;
case IntRegClass:
updateInt(tarmCtx, regRel);
break;
case MiscRegClass:
updateMisc(tarmCtx, regRel);
break;
default:
// If unsupported format, do nothing: non updating
// the register will prevent it to be printed.
break;
}
}
void
TarmacTracerRecord::TraceRegEntry::updateMisc(
const TarmacContext& tarmCtx,
RegIndex regRelIdx
)
{
auto thread = tarmCtx.thread;
regValid = true;
regName = miscRegName[regRelIdx];
valueLo = thread->readMiscRegNoEffect(regRelIdx);
// If it is the CPSR:
// update the value of the CPSR register and add
// the CC flags on top of the value
if (regRelIdx == MISCREG_CPSR) {
CPSR cpsr = thread->readMiscRegNoEffect(MISCREG_CPSR);
cpsr.nz = thread->readCCReg(CCREG_NZ);
cpsr.c = thread->readCCReg(CCREG_C);
cpsr.v = thread->readCCReg(CCREG_V);
cpsr.ge = thread->readCCReg(CCREG_GE);
// update the entry value
valueLo = cpsr;
}
}
void
TarmacTracerRecord::TraceRegEntry::updateCC(
const TarmacContext& tarmCtx,
RegIndex regRelIdx
)
{
auto thread = tarmCtx.thread;
regValid = true;
regName = ccRegName[regRelIdx];
valueLo = thread->readCCReg(regRelIdx);
}
void
TarmacTracerRecord::TraceRegEntry::updateFloat(
const TarmacContext& tarmCtx,
RegIndex regRelIdx
)
{
auto thread = tarmCtx.thread;
regValid = true;
regName = "f" + std::to_string(regRelIdx);
valueLo = bitsToFloat32(thread->readFloatRegBits(regRelIdx));
}
void
TarmacTracerRecord::TraceRegEntry::updateInt(
const TarmacContext& tarmCtx,
RegIndex regRelIdx
)
{
auto thread = tarmCtx.thread;
// Reading operating mode from CPSR.
// This is needed when printing the register name in case
// of banked register (e.g. lr_svc)
CPSR cpsr = thread->readMiscRegNoEffect(MISCREG_CPSR);
OperatingMode mode = (OperatingMode)(uint8_t)cpsr.mode;
std::string reg_suffix;
if (mode != MODE_USER) {
reg_suffix = "_" + opModeToStr(mode);
}
regValid = true;
switch (regRelIdx) {
case PCReg:
regName = "pc";
break;
case StackPointerReg:
regName = "sp" + reg_suffix ;
break;
case FramePointerReg:
regName = "fp" + reg_suffix;
break;
case ReturnAddressReg:
regName = "lr" + reg_suffix;
break;
default:
regName = "r" + std::to_string(regRelIdx);
break;
}
valueLo = thread->readIntReg(regRelIdx);
}
void
TarmacTracerRecord::addInstEntry(std::vector<InstPtr>& queue,
const TarmacContext& tarmCtx)
{
// Generate an instruction entry in the record and
// add it to the Instruction Queue
queue.push_back(
m5::make_unique<TraceInstEntry>(tarmCtx, predicate)
);
}
void
TarmacTracerRecord::addMemEntry(std::vector<MemPtr>& queue,
const TarmacContext& tarmCtx)
{
// Generate a memory entry in the record if the record
// implies a valid memory access, and add it to the
// Memory Queue
if (getMemValid()) {
queue.push_back(
m5::make_unique<TraceMemEntry>(tarmCtx,
static_cast<uint8_t>(getSize()),
getAddr(), getIntData())
);
}
}
void
TarmacTracerRecord::addRegEntry(std::vector<RegPtr>& queue,
const TarmacContext& tarmCtx)
{
// Generate an entry for every ARM register being
// written by the current instruction
for (auto reg = 0; reg < staticInst->numDestRegs(); ++reg) {
RegId reg_id = staticInst->destRegIdx(reg);
// Creating a single register change entry
auto single_reg = genRegister<TraceRegEntry>(tarmCtx, reg_id);
// Copying the entry and adding it to the "list"
// of entries to be dumped to trace.
queue.push_back(
m5::make_unique<TraceRegEntry>(single_reg)
);
}
// Gem5 is treating CPSR flags as separate registers (CC registers),
// in contrast with Tarmac specification: we need to merge the gem5 CC
// entries altogether with the CPSR register and produce a single entry.
mergeCCEntry<TraceRegEntry>(queue, tarmCtx);
}
void
TarmacTracerRecord::dump()
{
// Generate and print all the record's entries.
auto &instQueue = tracer.instQueue;
auto &memQueue = tracer.memQueue;
auto &regQueue = tracer.regQueue;
const TarmacContext tarmCtx(
thread,
staticInst->isMicroop()? macroStaticInst : staticInst,
pc
);
if (!staticInst->isMicroop()) {
// Current instruction is NOT a micro-instruction:
// Generate Tarmac entries and dump them immediately
// Generate Tarmac entries and add them to the respective
// queues.
addInstEntry(instQueue, tarmCtx);
addMemEntry(memQueue, tarmCtx);
addRegEntry(regQueue, tarmCtx);
// Flush (print) any queued entry.
flushQueues(instQueue, memQueue, regQueue);
} else {
// Current instruction is a micro-instruction:
// save micro entries into dedicated queues and flush them
// into the tracefile only when the MACRO-instruction
// has completed.
if (staticInst->isFirstMicroop()) {
addInstEntry(instQueue, tarmCtx);
}
addRegEntry(regQueue, tarmCtx);
addMemEntry(memQueue, tarmCtx);
if (staticInst->isLastMicroop()) {
// Flush (print) any queued entry.
flushQueues(instQueue, memQueue, regQueue);
}
}
}
template<typename Queue>
void
TarmacTracerRecord::flushQueues(Queue& queue)
{
std::ostream &outs = Trace::output();
for (const auto &single_entry : queue) {
single_entry->print(outs);
}
queue.clear();
}
template<typename Queue, typename... Args>
void
TarmacTracerRecord::flushQueues(Queue& queue, Args & ... args)
{
flushQueues(queue);
flushQueues(args...);
}
void
TarmacTracerRecord::TraceInstEntry::print(
std::ostream& outs,
int verbosity,
const std::string &prefix) const
{
// Pad the opcode
std::string opcode_str = csprintf("%0*x", instSize >> 2, opcode);
// Print the instruction record formatted according
// to the Tarmac specification
ccprintf(outs, "%s clk %s (%u) %08x %s %s %s_%s : %s\n",
curTick(), /* Tick time */
taken? "IT" : "IS", /* Instruction taken/skipped */
instCount, /* Instruction count */
addr, /* Instruction address */
opcode_str, /* Instruction opcode */
iSetStateToStr(isetstate), /* Instruction Set */
opModeToStr(mode), /* Exception level */
secureMode? "s" : "ns", /* Security */
disassemble); /* Instruction disass */
}
void
TarmacTracerRecord::TraceMemEntry::print(
std::ostream& outs,
int verbosity,
const std::string &prefix) const
{
// Print the memory record formatted according
// to the Tarmac specification
ccprintf(outs, "%s clk M%s%d %08x %0*x\n",
curTick(), /* Tick time */
loadAccess? "R" : "W", /* Access type */
size, /* Access size */
addr, /* Memory address */
size*2, /* Padding with access size */
data); /* Memory data */
}
void
TarmacTracerRecord::TraceRegEntry::print(
std::ostream& outs,
int verbosity,
const std::string &prefix) const
{
// Print the register record formatted according
// to the Tarmac specification
if (regValid)
ccprintf(outs, "%s clk R %s %08x\n",
curTick(), /* Tick time */
regName, /* Register name */
valueLo); /* Register value */
}
} // namespace Trace