On 26/09/2023 14:46, Wilco Dijkstra wrote: > > The outline atomic functions have hidden visibility and can only be called > directly. Therefore we can remove the BTI at function entry. This improves > security by reducing the number of indirect entry points in a binary. > The BTI markings on the objects are still emitted.
Please can you add a comment to that effect in the source code. OK with that change. R. > > Passes regress, OK for commit? > > libgcc/ChangeLog: > * config/aarch64/lse.S (BTI_C): Remove define. > > --- > > diff --git a/libgcc/config/aarch64/lse.S b/libgcc/config/aarch64/lse.S > index > ba05047ff02b6fc5752235bffa924fc4a2f48c04..dbfb83fb09083641bf06c50b631a5f27bdf61b80 > 100644 > --- a/libgcc/config/aarch64/lse.S > +++ b/libgcc/config/aarch64/lse.S > @@ -163,8 +163,6 @@ see the files COPYING3 and COPYING.RUNTIME respectively. > If not, see > #define tmp3 14 > #define tmp4 13 > > -#define BTI_C hint 34 > - > /* Start and end a function. */ > .macro STARTFN name > .text > @@ -174,7 +172,6 @@ see the files COPYING3 and COPYING.RUNTIME respectively. > If not, see > .type \name, %function > .cfi_startproc > \name: > - BTI_C > .endm > > .macro ENDFN name
