/*
 * Copyright 2002-2019 Intel Corporation.
 * 
 * This software is provided to you as Sample Source Code as defined in the accompanying
 * End User License Agreement for the Intel(R) Software Development Products ("Agreement")
 * section 1.L.
 * 
 * This software and the related documents are provided as is, with no express or implied
 * warranties, other than those that are expressly stated in the License.
 */



/* ===================================================================== */
/*! @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>
#include <limits.h>
#include <stdlib.h>
using std::cout;
using std::endl;


/* ===================================================================== */
static char (*pf_bar)( int, int, unsigned int, signed char, signed char, unsigned char,
                      int, int, unsigned int, signed char, signed char, unsigned char );

/* ===================================================================== */
int Boo(  CONTEXT * ctxt, AFUNPTR pf_Green )
{
    char ret = 0;

    PIN_CallApplicationFunction( ctxt, PIN_ThreadId(),
                                 CALLINGSTD_DEFAULT, pf_Green, NULL,
                                 PIN_PARG(char), &ret,
                                 PIN_PARG(int), INT_MIN,
                                 PIN_PARG(int), INT_MAX,
                                 PIN_PARG(unsigned int), UINT_MAX,
                                 PIN_PARG(signed char), SCHAR_MIN,
                                 PIN_PARG(signed char), SCHAR_MAX,
                                 PIN_PARG(unsigned char), UCHAR_MAX,
                                 PIN_PARG(int), INT_MIN,
                                 PIN_PARG(int), INT_MAX,
                                 PIN_PARG(unsigned int), UINT_MAX,
                                 PIN_PARG(signed char), SCHAR_MIN,
                                 PIN_PARG(signed char), SCHAR_MAX,
                                 PIN_PARG(unsigned char), UCHAR_MAX,
                                 PIN_PARG_END() );

    if ( ret == '1' )
        cout << "Correct return value" << endl;
    else
        cout << "ret = " << ret << endl;
    
    return ret;
}


/* ===================================================================== */
VOID ImageLoad(IMG img, VOID *v)
{
    if ( IMG_IsMainExecutable( img ))
    {
        PROTO proto = PROTO_Allocate( PIN_PARG(char), CALLINGSTD_DEFAULT,
                                      "Bar12", PIN_PARG(int), PIN_PARG(int),
                                      PIN_PARG(unsigned int), PIN_PARG(signed char),
                                      PIN_PARG(signed char), PIN_PARG(unsigned char),
                                      PIN_PARG(int), PIN_PARG(int),
                                      PIN_PARG(unsigned int), PIN_PARG(signed char),
                                      PIN_PARG(signed char), PIN_PARG(unsigned char),
                                      PIN_PARG_END() );
        
        VOID * pf_Green;
        RTN rtn1 = RTN_FindByName(img, "Green12");
        if (RTN_Valid(rtn1))
            pf_Green = reinterpret_cast<VOID *>(RTN_Address(rtn1));
        else
        {
            cout << "Green12 cannot be found." << endl;
            exit(1);
        }
        
        RTN rtn = RTN_FindByName(img, "Bar12");
        if (RTN_Valid(rtn))
        {
            cout << "Replacing " << RTN_Name(rtn) << " in " << IMG_Name(img) << endl;
            
            pf_bar = (char (*)( int, int, unsigned int, signed char, signed char, unsigned char,
                                int, int, unsigned int, signed char, signed char, unsigned char ))
                     RTN_ReplaceSignature(
                         rtn, AFUNPTR(Boo),
                         IARG_PROTOTYPE, proto,
                         IARG_CONTEXT,
                         IARG_PTR, pf_Green,
                         IARG_END);
            
        }    
        PROTO_Free( proto );
    }
}

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

    IMG_AddInstrumentFunction(ImageLoad, 0);
    
    PIN_StartProgram();

    return 0;
}

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