ass-js

Assembler.js

x86 assembler in JavaScript.

import * as ass from 'ass-js';
var {rax, rbx} = ass.x86;

var _ = ass.x86.x64.Code.create();
_.mov(rax, rbx);
var bin = _.compile();
console.log(_.toString());
console.log(bin);

See supported instructions:

console.log(ass.x86.x64.Code.table.toString());

Examples

Hello World

Below example in CoffeeScript writes "Hello World!" to console using write system call.

{rax, rdx, rsi, rdi, rip} = require 'ass-js/x86/operand'
{Code} = require 'ass-js/x86/x64/code'
{StaticBuffer} = require 'static-buffer/buffer'

_ = Code.create()

msg = 'Hello World!\n'
_.movq rax, 1
_.movq rdi, 1
_.lea rsi, rip.disp 10
_.movq rdx, msg.length
_.syscall()
_.ret()
_.db msg

StaticBuffer.from(_.compile(), 'rwe').call()

Test

mocha