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Assembler Shell(asmshell)

Assembler(Keystone-Engine) + Emulator(Unicorn-Engine) + interactive cli library(ishell) = Text-based Assembler Emulator

Assembler Shell(asmshell) is a Text-based assembler emulator.

You can easily check the execution result of the assembler.

Enjoy! :)

Feature

Multi-architecture support(depends on unicorn/keystone-engine)

Assemble & emulation          : i8086, x86, x64, arm-thumb(be), arm(be), arm64, mips(be), mips64(be), sparc, sparc64
Assemble only                 : powerpc, powerpc64(le), sparcle, systemZ
Future support                : arm64be, m68k

Useful functions

Shell like commands           : fragments, run linux commands...etc
Handled like a shell          : Ctrl-P/Ctrl-N, Ctrl-A/Ctrl-E, Ctrl-H/Ctr-D...etc
Cross Platform(depends on go) : *NIX, OSX, Windows
APIs                          : see go/examples

Install

Go language, unicorn-engine and keystone-engine are necessary, but the installation process is automated with Makefile.

Linux/Mac

  1. Install CMake/Python(2.X,virtualenv)/make/Compiler(gcc,g++)/Git

  2. Build asmshell

    $ virtualenv2 ENV && . ENV/bin/activate $ git clone https://github.com/poppycompass/asmshell
    $ cd asmshell && make
    $ ./asmshell.exe -h

If you have already installed go and unicorn, keystone and capstone, run this.

$ make symlink deps asmshell

Windows

TODO

Usage

Help

$ ./asmshell.exe [-h/--help]

x86

$ ./asmshell.exe

x86 mode

x64

$ ./asmshell.exe -a x64

x64 mode

Tutorial

Fragment Commands(Example: Symbol, Read file)

You can register mnemonic fragments.

$ ./asmshell.exe
(x86)> fragment symbol # register from input
in> mov ecx, 0x20
... l1:
... inc eax
... dec ecx
... jnz l1; # ';' is end the register
'symbol` is registered
(x86)> fragment show # show registered fragments. If you want show specify fragments, run this -> 'fragment show <name1> <name2>...'
'symbol'
    l1:
    inc eax
    dec ecx
    jnz l1
(x86)> fragment run symbol

Read from file.

$ cat xor.txt
xor ax, cx
$ ./asmshell.exe
(x86)> f encrypt encrypt.txt # register from file. 'f' is alias of fragment
(x86)> f s encrypt           # 'f s' is alias of 'fragment show'
(x86)> f r encrypt           # fragment run encrypt

If you want to register binary code, change filename to ".bin".(".bin" suffix is very important)

(x86)> f test code.bin # disassemble code.bin and register
(x86)> f s test

Change Architecture

$ ./asmshell.exe
(x86)> set # show available architecture
Usage: set <arch>
Supported: i8086, x86, x64, arm-thumb(be), arm(be), arm64, mips(be), mips64(be), sparc(le), sparc64, [ppc|powerpc], [ppc64(le)|powerpc64(le)], [sysz|systemz|systemZ]
(x86)> set arm
(arm)>

Run shell command(now linux & mac only)

$ ./asmshell.exe
(x86)> !ls -lga

Available Shell Commands

help                       : display help
fragment [run/show/delete] : register/run/show/delete fragment
!<cmd>                     : run shell commands
set <arch>                 : set architecture and mode
exit/quit/q                : exit the program

Contribution

I am not an architectual expert. Therefore, I think there are many bugs and strangeness in this program. If you want to contribute, please pick up something from our Github issues. We also maintain a list of more challenged problems in a TODO.txt.

License

The software in this repository is covered by the MIT license.

Author

poppycompass (t0g0v31dk at gmail dot com)

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Multi-arch command line assembler shell

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