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Intel Open Source License 

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/* ===================================================================== */
/*! @file
  Replace an original function with a custom function defined in the tool. The
  new function can have either the same or different signature from that of its
  original function.
*/

/* ===================================================================== */
#include "pin.H"
#include <iostream>

using namespace std;

/* ===================================================================== */
static void (*pf_bar)(int, int, int, int);

/* ===================================================================== */
VOID Boo(  UINT32 num0, UINT32 num1, UINT32 arg0, UINT32 arg1, 
           UINT32 num2, UINT32 num3, UINT32 num4,
           UINT32 arg2, UINT32 arg3 )
{
    cout << "Original Arguments = ( "
         << arg0 << ", " 
         << arg1 << ", " 
         << arg2 << ", "
         << arg3 << " )"
         << endl << flush;

    cout << "New Arguments = ( "
         << num0 << ", " 
         << num1 << ", " 
         << num2 << ", "
         << num3 << ", "
         << num4 << " )"
         << endl << flush;
}

/* ===================================================================== */
VOID ImageLoad(IMG img, VOID *v)
{
    cout << IMG_Name(img) << endl;

    PROTO proto = PROTO_Allocate( PIN_PARG(void), CALLINGSTD_DEFAULT,
                                  "Bar", PIN_PARG(int), PIN_PARG(int),
                                  PIN_PARG(int), PIN_PARG(int),
                                  PIN_PARG_END() );
    
    RTN rtn = RTN_FindByName(img, "Bar");
    if (RTN_Valid(rtn))
    {
        cout << "Replacing " << RTN_Name(rtn) << " in " << IMG_Name(img) << endl;

        pf_bar = (void (*)(int, int, int, int))RTN_ReplaceSignatureProbed(
            rtn, AFUNPTR(Boo),
            IARG_PROTOTYPE, proto,
            IARG_UINT32, 100,
            IARG_UINT32, 200,
            IARG_FUNCARG_ENTRYPOINT_VALUE, 0,
            IARG_FUNCARG_ENTRYPOINT_VALUE, 1,
            IARG_UINT32, 300,
            IARG_UINT32, 400,
            IARG_UINT32, 500,
            IARG_FUNCARG_ENTRYPOINT_VALUE, 2,
            IARG_FUNCARG_ENTRYPOINT_VALUE, 3,
            IARG_END);
    }

    PROTO_Free( proto );
}

/* ===================================================================== */
int main(INT32 argc, CHAR *argv[])
{
    PIN_InitSymbols();

    PIN_Init(argc, argv);

    IMG_AddInstrumentFunction(ImageLoad, 0);
    
    PIN_StartProgramProbed();

    return 0;
}

/* ===================================================================== */
/* eof */
/* ===================================================================== */