fake-bti

This library provides fake replacements for the BTI and PMT syscalls for the purpose of testing driver code in an unprivileged environment. It works by defining strong symbols over system calls which interact with BTIs, e.g.:

• zx_object_get_info()
• zx_bti_pin()
• zx_bti_release_quarantine().
• zx_pmt_unpin()

The C++ and Rust libraries exposes methods for creating fake BTI “handles” that are compatible with Zircon system calls. Generally, it is safe to use any system call on a fake BTI that is compatible with a regular BTI handle.