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/*
* Copyright (c) 2006 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.
*
* Authors: Gabe Black
*/
#include <iostream>
#include <errno.h>
#include <sys/ptrace.h>
#include <stdint.h>
#include "tracechild_i386.hh"
using namespace std;
int64_t
I386TraceChild::getRegs(user_regs_struct & myregs, int num)
{
assert(num < numregs && num >= 0);
switch (num) {
//GPRs
case EAX: return myregs.eax;
case EBX: return myregs.ebx;
case ECX: return myregs.ecx;
case EDX: return myregs.edx;
//Index registers
case ESI: return myregs.esi;
case EDI: return myregs.edi;
//Base pointer and stack pointer
case EBP: return myregs.ebp;
case ESP: return myregs.esp;
//Segmentation registers
case CS: return myregs.cs;
case DS: return myregs.ds;
case ES: return myregs.es;
case FS: return myregs.fs;
case GS: return myregs.gs;
case SS: return myregs.ss;
//PC
case EIP: return myregs.eip;
default:
assert(0);
return 0;
}
}
bool
I386TraceChild::update(int pid)
{
oldregs = regs;
if (ptrace(PTRACE_GETREGS, pid, 0, ®s) != 0)
return false;
for (unsigned int x = 0; x < numregs; x++) {
regDiffSinceUpdate[x] = (getRegVal(x) != getOldRegVal(x));
}
}
I386TraceChild::I386TraceChild()
{
for (unsigned int x = 0; x < numregs; x++)
regDiffSinceUpdate[x] = false;
}
int64_t
I386TraceChild::getRegVal(int num)
{
return getRegs(regs, num);
}
int64_t
I386TraceChild::getOldRegVal(int num)
{
return getRegs(oldregs, num);
}
TraceChild *
genTraceChild()
{
return new I386TraceChild;
}
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