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#include "pin.H"
#include <stdio.h>
FILE *fp;


bool instrumented = FALSE;

unsigned int xmmInitVals[64];


extern "C" int SetXmmScratchesFun(unsigned int *values);


// Insert a call to an analysis routine that sets the scratch xmm registers, the call is inserted just after the
// movdqa instruction of DoXmm (see xmm-asm-*.s)
static VOID InstrumentRoutine(RTN rtn, VOID *)
{
    if (RTN_Name(rtn) == "DoXmm")
    {
        RTN_Open(rtn);
        for (INS ins = RTN_InsHead(rtn); INS_Valid(ins); ins = INS_Next(ins))
        {
            if (INS_Opcode(ins)==XED_ICLASS_MOVDQA)
            {
                fprintf (fp, "instrumenting ins %p %s\n", (void *)INS_Address(ins), INS_Disassemble(ins).c_str());
                instrumented = TRUE;
                INS_InsertCall(ins, IPOINT_AFTER, (AFUNPTR)SetXmmScratchesFun, IARG_PTR, xmmInitVals, IARG_END);
            }
        }
        RTN_Close(rtn);
    }
}



static void OnExit(INT32, VOID *)
{
    if (!instrumented)
    {
        fprintf (fp, "***Error tool did not instrument the movdqa instruction of DoXmm\n");
        fflush (fp);
        PIN_ExitProcess(1);
    }
    else
    {
        fprintf (fp, "instrumented the movdqa instruction of DoXmm\n");
        fflush (fp);
    }
}


// argc, argv are the entire command line, including pin -t <toolname> -- ...
int main(int argc, char * argv[])
{
    fp = fopen ("set_xmm_scratches.out", "w");
    
    // initialize memory area used to set values in ymm regs
    for (int i =0; i<64; i++)
    {
        xmmInitVals[i] = 0xdeadbeef;
    }

    PIN_InitSymbols();

    // Initialize pin
    PIN_Init(argc, argv);

    // Register Instruction to be called to instrument the movdqa instruction of DoXmm
    RTN_AddInstrumentFunction(InstrumentRoutine, 0);

    PIN_AddFiniFunction(OnExit, 0);
    
    // Start the program, never returns
    PIN_StartProgram();
    
    return 0;
}
