Reference no: EM132640631

IST 543 Foundations of Software Security, Penn State University

Compile exercise.c with the following command
gcc -ggdb -m32 -fno-stack-protector -fcf-protection=none exercise.c

If you are using some latest gcc versions, you can take out the option -fcf-protection=none
if it is not available.

Answer the following questions:

(1) How many bytes does the string "john" occupy in memory? Explain.

(2) Where is "john" stored (memory address)?

(3) Where is the variable "name" stored (memory address)?

(4) What are the memory addresses of "main" (code), foo, and bar?

(5) Draw the stack layout when bar() is called first time.

Include everything in memory. See the recording and transcript of this week's class

(6) What will happen if the loop termination condition is changed to "i<1024"?*/

#include <stdio.h>

void foo();
void bar();

void main()
{
char *name = "john";
printf("hello %s!", name);
foo();
}

void foo()
{
int a=1000000;
while (a>0)
bar();
}

void bar()
{
char buf[16];
int i;

/* Question (4) */

for (i=0; i<16; i++) {
buf[i] = 'a';
}
}