AndroidNativeEmu

Allows you to partly emulate an Android native library.

This is an educational project to learn more about the ELF file format and Unicorn.

Features

• Emulation of the JNI Invocation API 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.

The first two are still being worked on, please contribute if you can! :)

Dependencies

• Unicorn CPU emulator framework
• Keystone assembler framework

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

Code sources

• https://github.com/lunixbochs/usercorn
• https://github.com/slick1015/pad_unpacker (SVC 0 instruction)