/*
* main.cpp
*
* Created on: Apr 2, 2011
* Author: masa
*/
#include <iostream>
#include <string>
using namespace std;
extern "C" {
void dumpStack32(void*, int);
}
void foo(int, int);
void boo();
unsigned long *org_ptr;
int offset = 4;
int main(){
foo(1, 2);
return 0;
}
void dumpStack32(void* ptr, int counts) {
unsigned long *ulong_ptr = (unsigned long *)ptr;
printf("---------------------\n");
printf(" address | long var \n");
printf("---------------------\n");
for(int i=0; i<counts; i++)
printf(" %08x| %08x \n", &ulong_ptr[i], (unsigned int)ulong_ptr[i]);
printf("-----------------------------------------\n");
}
void foo(int a, int b) {
int c = a + b;
cout << "Sum is :" << c << endl;
dumpStack32(&c, 15);
unsigned long *ulong_ptr = (unsigned long *)&a;
printf(" %08x\n", *(ulong_ptr+offset));
org_ptr = (unsigned long *)*(ulong_ptr+offset);
printf("main's address %08x", (unsigned long)(&main));
*(ulong_ptr+offset) = (long unsigned int)&boo;
}
void boo(){
int c = 5;
cout << endl << "Boo!" << endl;
unsigned long *ulong_ptr = (unsigned long *)&c;
printf(" %08x", *(ulong_ptr+2));
printf(" org = %08x", org_ptr);
*(ulong_ptr+2) = (long unsigned int)org_ptr;
dumpStack32(&c, 10);
}
