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/*
* Copyright (c) 2005 The Regents of The University of Michigan
* All rights reserved.
*
* 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.
*/
#include "arch/arm/stacktrace.hh"
#include <string>
#include "arch/arm/isa_traits.hh"
#include "base/bitfield.hh"
#include "base/trace.hh"
#include "cpu/base.hh"
#include "cpu/thread_context.hh"
#include "mem/port_proxy.hh"
#include "sim/system.hh"
namespace ArmISA
{
static int32_t
readSymbol(ThreadContext *tc, const std::string name)
{
PortProxy &vp = tc->getVirtProxy();
const auto *symtab = tc->getSystemPtr()->workload->symtab(tc);
Addr addr;
if (!symtab->findAddress(name, addr))
panic("thread info not compiled into kernel\n");
return vp.read<int32_t>(addr, GuestByteOrder);
}
ProcessInfo::ProcessInfo(ThreadContext *_tc) : tc(_tc)
{
thread_info_size = readSymbol(tc, "thread_info_size");
task_struct_size = readSymbol(tc, "task_struct_size");
task_off = readSymbol(tc, "thread_info_task");
pid_off = readSymbol(tc, "task_struct_pid");
name_off = readSymbol(tc, "task_struct_comm");
}
Addr
ProcessInfo::task(Addr ksp) const
{
Addr base = ksp & ~0x1fff;
if (base == ULL(0xffffffffc0000000))
return 0;
Addr tsk;
PortProxy &vp = tc->getVirtProxy();
tsk = vp.read<Addr>(base + task_off, GuestByteOrder);
return tsk;
}
int
ProcessInfo::pid(Addr ksp) const
{
Addr task = this->task(ksp);
if (!task)
return -1;
uint16_t pd;
PortProxy &vp = tc->getVirtProxy();
pd = vp.read<uint16_t>(task + pid_off, GuestByteOrder);
return pd;
}
std::string
ProcessInfo::name(Addr ksp) const
{
Addr task = this->task(ksp);
if (!task)
return "unknown";
char comm[256];
tc->getVirtProxy().readString(comm, task + name_off, sizeof(comm));
if (!comm[0])
return "startup";
return comm;
}
StackTrace::StackTrace()
: tc(0), stack(64)
{
}
StackTrace::StackTrace(ThreadContext *_tc, const StaticInstPtr &inst)
: tc(0), stack(64)
{
trace(_tc, inst);
}
StackTrace::~StackTrace()
{
}
void
StackTrace::trace(ThreadContext *_tc, bool is_call)
{
}
bool
StackTrace::isEntry(Addr addr)
{
return false;
}
bool
StackTrace::decodeStack(MachInst inst, int &disp)
{
return false;
}
bool
StackTrace::decodeSave(MachInst inst, int &reg, int &disp)
{
return false;
}
/*
* Decode the function prologue for the function we're in, and note
* which registers are stored where, and how large the stack frame is.
*/
bool
StackTrace::decodePrologue(Addr sp, Addr callpc, Addr func,
int &size, Addr &ra)
{
return false;
}
#if TRACING_ON
void
StackTrace::dump()
{
DPRINTFN("------ Stack ------\n");
DPRINTFN(" Not implemented\n");
}
#endif
}