creverse-engineeringdecompilingollydbg

Using the Ollydbg,anyone tell me what the address of the variable "a" is?

My very simple tested program

#include<stdio.h>
#include<stdlib.h>

int main()
{
int a = 12345;
printf("%d\n", a);

system("PAUSE");
return 0;

}

After compiled and connected,the EXE file is created.Then I open the EXE file in the Ollydbg: OllyDbg

The picture shows the main() function.But I can't find out what the address of the variable a is. When passing the params to the printf() function,it push 3039 into the stack, then it means the value of the variable a is 3039? No,the value is 12345. So it means the address of the variable a is 00003039? Anyone

Solution

  • Address of the a variable is [ebp-8]. You are seeing 0x3039 assignment, because decimal 12345 is hexadecimal 0x3039. If you change your code to use hex value: int a = 0x12345, results would be more clear: IDA results

    Numeric constants are usually compiled directly into the code.