https://github.com/AeonLucid/AndroidNativeEmu

Allows you to partly emulate an Android native library.
https://github.com/AeonLucid/AndroidNativeEmu

android android-native-library arm emulator unicorn

Last synced: about 2 months ago
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Allows you to partly emulate an Android native library.

• Host: GitHub
• URL: https://github.com/AeonLucid/AndroidNativeEmu
• Owner: AeonLucid
• License: gpl-3.0
• Created: 2018-07-09T14:44:28.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2023-10-02T02:46:44.000Z (12 months ago)
• Last Synced: 2024-07-05T03:55:51.144Z (2 months ago)
• Topics: android, android-native-library, arm, emulator, unicorn
• Language: Python
• Size: 1.19 MB
• Stars: 1,332
• Watchers: 58
• Forks: 406
• Open Issues: 11
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.txt

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README

        
# AndroidNativeEmu

[![GitHub Workflow Status](https://img.shields.io/github/workflow/status/AeonLucid/AndroidNativeEmu/Python%20Package?style=for-the-badge)](https://github.com/AeonLucid/AndroidNativeEmu/actions)

[![PyPI](https://img.shields.io/pypi/v/androidemu?style=for-the-badge)](https://pypi.org/project/androidemu/)

![PyPI - Python Version](https://img.shields.io/pypi/pyversions/androidemu?style=for-the-badge)

Allows you to partly emulate an Android native library.

This is an educational project to learn more about the ELF file format and [Unicorn](https://github.com/unicorn-engine/unicorn).

> Read me for chinese readers [中文README](README_cn.md)

## Features

- Emulation of the [JNI Invocation API](https://docs.oracle.com/javase/7/docs/technotes/guides/jni/spec/invocation.html) so `JNI_OnLoad` can be called properly.

- Emulation of native memory for malloc / memcpy.

- Emulation of syscalls (SVC #0) instruction.

- Hooking through the symbol table.

- All JavaVM, JNIEnv and hooked functions are handled by python.

- Enable VFP support.

## Installation

You can install AndroidNativeEmu with pip.

```

pip install androidemu

```

## TODO

- Improve file descriptors in `vfs/file_system.py` so they are re-useable.

- Add a way for the VirtualFileSystem to give back dynamic files, such as `/proc/self/status`, `/proc/self/status` but also `/dev/urandom`.

- Library consumers must be able to easily rebuild the needed Java classes for a native library, which are used by the native library through the JNIEnv.

  - ~~Classes~~

  - ~~Objects~~

  - ~~Methods~~

  - ~~Native methods~~

  - Fields

  - Types

  - Reflection

## Dependencies

- [Unicorn CPU emulator framework](https://github.com/unicorn-engine/unicorn)

- [Keystone assembler framework](https://github.com/keystone-engine/keystone)

## Resources

All resources used while developing AndroidNativeEmu.

### Text sources

- https://greek0.net/elf.html

- https://stackoverflow.com/questions/13908276/loading-elf-file-in-c-in-user-space

- https://programtalk.com/python-examples/pyelftools.elftools.elf.relocation.Relocation/

- http://infocenter.arm.com/help/topic/com.arm.doc.ihi0044f/IHI0044F_aaelf.pdf

- https://wiki.osdev.org/ELF_Tutorial

- https://docs.oracle.com/javase/7/docs/technotes/guides/jni/spec/functions.html

- https://android.googlesource.com/platform/dalvik/+/donut-release/vm/Jni.c

### Code sources

- https://github.com/lunixbochs/usercorn

- https://github.com/slick1015/pad_unpacker (SVC 0 instruction)