MACHINE LANGUAGE ENCODER

  A target-agnostic machine language encoder with labels and macros.


USAGE

  mle < SOURCE > CODE 


INSTALLATION

  # cp -a mle /usr/bin/mle
  # chown root:root /usr/bin/mle
  # chmod 755 /usr/bin/mle


EXAMPLE

  $ cat /tmp/pwd.src
  Magic:
          90

  Start:
          # getcwd(directory, 2048);
          54 5f                                 # mov rsp rdi
          66 be 00 08                           # mov 2048 si
          6a 4f 58                              # mov SYS_GETCWD rax
          0f 05                                 # syscall

          # Replace the NUL terminator with LF.
          c6 44 07 ff 0a                        # mov '\n' (rdi + rax - 1)

          # write(STDOUT_FILENO, directory, strlen(directory));
          92                                    # xchg eax edx
          57 5e                                 # mov rdi rsi
          6a 01 5f                              # mov STDOUT_FILENO rdi
          57 58                                 # mov SYS_WRITE rax
          0f 05                                 # syscall

          # exit(EXIT_SUCCESS);
          31 ff                                 # mov EXIT_SUCCESS rdi
          b0 3c                                 # mov SYS_EXIT rax
          0f 05                                 # syscall

  $ mle < /tmp/pwd.src > /tmp/pwd
  $ chmod 755 /tmp/pwd
  $ ls -al /tmp/pwd
  -rwxr-xr-x 1 user user 33 Dec 31 02:01 /tmp/pwd

  $ cd /tmp
  $ strace ./pwd
  execve("./pwd", ["./pwd"], 0x7ffcf3a8abc0 /* 42 vars */) = 0
  open("./pwd", O_RDONLY)                 = 3
  fstat(3, {st_mode=S_IFREG|0755, st_size=33, ...}) = 0
  mmap(NULL, 33, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x7f816a9c6000
  getcwd("/tmp", 2048)                    = 5
  write(1, "/tmp\n", 5)                   = 5
  exit(0)                                 = ?
  +++ exited with 0 +++


SEE ALSO

  http://github.com/jhswartz/mle-x86
  http://github.com/jhswartz/mli-amd64


AUTHOR

  Justin Swartz <justin.swartz@risingedge.co.za>