Hi Sami, On Tue, 29 Sep 2020, Sami Tolvanen wrote: > From: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > Add the --mcount option for generating __mcount_loc sections > needed for dynamic ftrace. Using this pass requires the kernel to > be compiled with -mfentry and CC_USING_NOP_MCOUNT to be defined > in Makefile. > > Link: https://lore.kernel.org/lkml/20200625200235.GQ4781@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/ > Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > [Sami: rebased to mainline, dropped config changes, fixed to actually use > --mcount, and wrote a commit message.] > Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx> > Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> I am sorry to reply on v4. Should have been sooner. Julien has been sending patches to make objtool's check functionality arch-agnostic as much as possible. So it seems to me that the patch should be based on the effort I also wonder about making 'mcount' command separate from 'check'. Similar to what is 'orc' now. But that could be done later. See tip-tree/objtool/core for both. Thanks Miroslav
