Mark Brown <broonie@xxxxxxxxxx> writes: > Implement the architecture neutral prtctl() interface for setting the > shadow stack status, this supports setting and reading the current GCS > configuration for the current thread. > > Userspace can enable basic GCS functionality and additionally also > support for GCS pushes and arbatrary GCS stores. It is expected that s/arbatrary/arbitrary/ > this prctl() will be called very early in application startup, for > example by the dynamic linker, and not subsequently adjusted during > normal operation. Users should carefully note that after enabling GCS > for a thread GCS will become active with no call stack so it is not > normally possible to return from the function that invoked the prctl(). -- Thiago
