On Fri, 24 Apr 2015, AKASHI Takahiro wrote:
This patchset enables livepatch support on arm64.
Livepatch was merged in v4.0, and allows replacying a function dynamically
based on ftrace framework, but it also requires -mfentry option of gcc.
Currently arm64 gcc doesn't support it, but by adding a helper function to
ftrace, we will be able to support livepatch on arch's which don't support
this option.
I submit this patchset as RFC since I'm not quite sure that I'm doing
in the right way, or we should definitely support -fentry instead.
I don't have arm64 cross-compiler handy, could you please copy/paste how
does function prologue, generated by gcc -pg on arm64 look like?
Thanks,
--
Jiri Kosina
SUSE Labs