[Bug c/69624] sanitize-coverage=trace-pc miscompiles kernel

[jirislaby at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69624

--- Comment #2 from Jiri Slaby <jirislaby at gmail dot com> ---
Created attachment 37553
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37553&action=edit
__sanitizer_cov_trace_pc implementation

This guys actually changes rdx.