void weird_print(char *str)
{
        char buffer[100];
        int n=0;
        
        for (n=0; n<=100;n++)
                buffer[n]=str[n];        

        printf("%s\n", buffer);
}

int main(int argc, char *argv[])
{
        if (argc>1) weird_print(argv[1]);

        return 0;
}

$ ./test `perl -e 'print "A" x 10'`

mov	0xfffffffc(%ebp),%eax                ;lấy giá trị n từ bộ nhớ ra thanh ghi eax.
....                                                    ; thực hiện đọc 1 byte từ str & copy sang buffer.
addl	$0x1, 0xfffffffc(%ebp)                ; tăng giá trị nằm trong vùng nhớ n lên 1 & so sánh
cmp	$0x64, 0xfffffffc(%ebp)
jle	...

void weird_print(char *str)
 {
         char buffer[100];
         int n=0;
         printf("Address of n:%p\n",&n);
         printf("Address of buffer[100]:%p\n",&buffer[100]);
         for (n=0; n<=100;n++)
                 buffer[n]=str[n];        
 
         printf("%s\n", buffer);
 }

mov  0xffffff98(%ebp), eax
....
[color=red]add 	$0x1, %eax
mov 	%eax, 0xffffff98(%ebp)
mov 	0xffffff98(%ebp), %eax[/color]
cmp	$0x64, %eax
jle	....

printf("Address of buffer[100]:%p\n",&buffer[100]);