https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128360
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
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Last reconfirmed| |2026-11-02
Status|UNCONFIRMED |NEW
Ever confirmed|0 |1
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Confirmed.
The documentation for cf_check says:
The 'cf_check' attribute on a function is used to inform the compiler
that ENDBR instruction should be placed at the function entry when
'-fcf-protection=branch' is enabled.
and -mmanual-endbr is documented as:
Insert ENDBR instruction at function entry only via the 'cf_check'
function attribute.
so a function carrying cf_check should always get ENDBR at entry. However,
rest_of_insert_endbr_and_patchable_area additionally requires
!only_called_directly_p () (or one of the other conditions from the
automatic heuristic), so cf_check is silently ignored for static or
localized functions whose address is not visible to the compiler.
The fix is to let cf_check take precedence over the heuristic, and to use
the heuristic only when -mmanual-endbr is not given:
