Retrieves Bitcode from Mach-O binaries
Bitcode stores as an xar archive inside of a Mach-O binary.
This tool extracts the archive and puts it near the binary, so it can be easily discovered using
Clone the repo and run
make, built binary lays inside of
$ git clone email@example.com:AlexDenisov/bitcode_retriever.git $ cd bitcode_retriever $ make
Note: currently is does not work with static libraries, there is an opened issue #1, if you need this feature please a comment there, it will bump prioity of this project at my personal todo-list.
bitcode_retriever simple feed him your binary and it'll produce archive with bitcode.
It accepts both fat and non-fat binaries. For fat binaries it produces separate archive for each slice, e.g.:
$ bitcode_retriever fat_app i386.xar x86_64.xar arm64.xar
for non-fat binaries it produces just one archive with the bitcode:
$ bitcode_retriever non_fat_app i386.xar
To skip the xar archive and obtain the bitcode immediately, pass the
$ bitcode_retriever -e fat_app i386.1.bc i386.2.bc x86_64.1.bc x86_64.2.bc
The project provides a sample binaries, you can play a bit with them:
$ make subject $ cd build $ ./bitcode_retriever i386.o # or $ ./bitcode_retriever fat.o
The xar archive stores set of files with bitcode:
$ xar -xf i386.o $ ls i386.o 1 2
You can dump LLVM IR from each file (
$ llvm-dis 1 $ llvm-dis 2 $ ls 1 2 1.ll 2.ll
Bugs and issues
If you have any problems or found some bug - feel free to open an issue and/or send a pull request