x86, build: use objtool mcount

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Select HAVE_OBJTOOL_MCOUNT if STACK_VALIDATION is selected to use
objtool to generate __mcount_loc sections for dynamic ftrace with
Clang and gcc <5 (later versions of gcc use -mrecord-mcount).

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>

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Sami Tolvanen 2020-08-06 15:15:02 -07:00 • committed by Kees Cook

parent 22c8542d7b

commit 6dafca9780

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