Emulator interface for ARM 32-bit
Switch branches/tags
Nothing to show
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Failed to load latest commit information.



JuniEmu is an emulator interface designed for ARM 32-bit.

JuniEmu is using Unicorn framework for emulation, Capstone disassembly framework and Python's standard GUI package - Tkinter.

The goal of the project was to visually emulate (single step, breakpoint, memory view\edit) raw ARM binaries (bootloaders, embedded firmware, standalone functions, etc).


  • Single steeping and breakpoint support
  • Memory view and edit
  • Registers view and edit
  • Instruction highlighting

Commandline cmd

help - print help

d <addr> - dump memory to current view windows e.g. d 0x1030

u <addr> - unassemble address or register e.g. u pc, u 0x1030, u 0x1031 (disasm 0x1030 in Thumb mode)

bp <addr> - set breakpoint

bc <addr> - clear breakpoint

bl - list breakpoints

r <register> <value> - change register value e.g. r r0 0x101

rr - print registers

? - calc expression

dump <addr> <range> "PATH" - dump memory range to a file e.g. dump 0x1030 100 "/Users/bob/Desktop/dump.bin"


  • How to change program counter register to e.g. 0x1030 (ARM mode) ?

r pc 0x1030

  • How to change program counter to e.g. 0x1030 (Thumb mode) ?

To switch into thumb mode provide unaligned address (add +1 to the destination address)

r pc 0x1031


  • Not tested with Python 3
  • Not fully tested on Windows, MacOS
  • Input server will freeze the UI until until receiving bytes from the client

Dependencies (Python bindings)