On Fri, Sep 08, 2023 at 02:49:56PM -0600, Anthony J. Bentley wrote:
> Lucas Raab writes:
> > +Use when a port requires no enforcement of indirect branch targets. Use
>
> New sentence, new line.
>
> > +.Ev USE_NOBTCFI-${MACHINE_ARCH}
> > +to apply to specific architectures instead of all architectures.
>
> I would invert the wording: "Applies to all architectures; set
> USE_NOBTCFI-${MACHINE_ARCH} to apply to only a specific architecture."
More like this?
diff /usr/src
commit - 2933f00289463a6d1923d1b9cc5e5c1c5c697ece
path + /usr/src
blob - 00ec6c3f81fcf03e2222a69eabe8de1741a6e562
file + share/man/man5/bsd.port.mk.5
--- share/man/man5/bsd.port.mk.5
+++ share/man/man5/bsd.port.mk.5
@@ -3613,6 +3613,19 @@ and not intended to be a user setting.
See
.Ev WRKOBJDIR_MFS
for configuration.
+.It Ev USE_NOBTCFI
+If set to
+.Sq Yes,
+writes a wrapper script to ${WRKDIR}/bin/ld in
+.Cm patch
+to request that the linker adds an
+.Dv PT_OPENBSD_NOBTCFI
+ELF section. Use when a port requires no enforcement of indirect branch
+targets.
+.Pp
+Applies to all architectures; set
+.Ev USE_NOBTCFI-${MACHINE_ARCH}
+to apply to only a specific architecture.
.It Ev USE_NOEXECONLY
If set to
.Sq Yes ,
