On Mon, 25 Jun 2018 15:39:09 -0700 Thomas Garnier <thgar...@google.com> wrote:
> When using PIE with function tracing, the compiler generates a > call through the GOT (call *__fentry__@GOTPCREL). This instruction > takes 6-bytes instead of 5-bytes with a relative call. > > If PIE is enabled, replace the 6th byte of the GOT call by a 1-byte nop > so ftrace can handle the previous 5-bytes as before. > > Position Independent Executable (PIE) support will allow to extend the > KASLR randomization range 0xffffffff80000000. > > Signed-off-by: Thomas Garnier <thgar...@google.com> Thanks for doing it this way. Reviewed-by: Steven Rostedt (VMware) <rost...@goodmis.org> -- Steve
