#!/bin/bash

# assemble shellcode
nasm -felf32 shellcode.asm -o x.o && ld -m elf_i386 x.o -o shellcode &> /dev/null

# remove object file
rm x.o

# extract shellcode and remove binary
shellcode=$(for byte in $(objdump -d ./shellcode | grep "^ " | cut -f2); do echo -n '\x'$byte; done)
rm shellcode

# TODO place shellcode into test_shellcode.c and shellcode.asm

# compile test_shellcode.c and execute it afterwards
gcc -o test_shellcode -m32 -fno-stack-protector -fno-pie -z execstack -O0 test_shellcode.c && ./test_shellcode