Replace uses of endbr64 with _CET_ENDBR from cet.h

cet.h is needed for other platforms to emit the relevant .gnu.properties
sections that are necessary for them to enable IBT. It also avoids issues
with older toolchains on macOS that explode on encountering endbr64.

based on a diff by kettenis
ok beck kettenis

1 files changed, 16 insertions, 0 deletions

diff --git a/src/lib/libcrypto/perlasm/x86_64-xlate.pl b/src/lib/libcrypto/perlasm/x86_64-xlate.pl
index 5dbed2a8c4..325e7cf583 100755
--- a/src/lib/libcrypto/perlasm/x86_64-xlate.pl
+++ b/src/lib/libcrypto/perlasm/x86_64-xlate.pl
@@ -781,6 +781,22 @@ ___
 OPTION  DOTNAME
 ___
 }
+
+if ($nasm) {
+        print <<___;
+\%define _CET_ENDBR
+___
+} else {
+        print <<___;
+#if defined(__CET__)
+#include <cet.h>
+#else
+#define _CET_ENDBR
+#endif
+
+___
+}
+
 print "#include \"x86_arch.h\"\n";
 
 while($line=<>) {