Source code of bossa provided with the IDE

Hello, I would like to have the source code of bossa that is provided with the IDE. I found some source code on the intertubes, but all of them failed on an assertion when using with the Due board.

bossac: src/EefcFlash.cpp:65: EefcFlash::EefcFlash(Samba&, const string&, uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, bool): Assertion `pages <= 1024' failed.

I have noticed that there are to missing options: -U and -R.

Anybody knows where I can find the right source code?

Actually that was the non-Arduino version. But I just discovered there was a branch for Arduino: BOSSA/src at arduino · shumatech/BOSSA · GitHub. Thanks.