[src/trunk]: src/sys/arch/aarch64/aarch64 BE32 binaries are no longer support...

[rin <rin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/2021074a9864
branches:  trunk
changeset: 944839:2021074a9864
user:      rin <rin%NetBSD.org@localhost>
date:      Tue Oct 13 07:04:49 2020 +0000

description:
BE32 binaries are no longer supported for ARMv7 and later, and
therefore for aarch64eb.

Reject them with ENOEXEC, rather than causing illegal instruction
exceptions due to unexpected binary format.

diffstat:

 sys/arch/aarch64/aarch64/exec_machdep.c |  9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diffs (30 lines):

diff -r 051aac20d285 -r 2021074a9864 sys/arch/aarch64/aarch64/exec_machdep.c
--- a/sys/arch/aarch64/aarch64/exec_machdep.c   Tue Oct 13 06:58:57 2020 +0000
+++ b/sys/arch/aarch64/aarch64/exec_machdep.c   Tue Oct 13 07:04:49 2020 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: exec_machdep.c,v 1.7 2020/05/23 18:08:59 ryo Exp $ */
+/* $NetBSD: exec_machdep.c,v 1.8 2020/10/13 07:04:49 rin Exp $ */
 
 /*-
  * Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -31,7 +31,7 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(1, "$NetBSD: exec_machdep.c,v 1.7 2020/05/23 18:08:59 ryo Exp $");
+__KERNEL_RCSID(1, "$NetBSD: exec_machdep.c,v 1.8 2020/10/13 07:04:49 rin Exp $");
 
 #include "opt_compat_netbsd.h"
 #include "opt_compat_netbsd32.h"
@@ -77,6 +77,11 @@
        /* OABI not support */
        if (!elf_aapcs_p)
                return ENOEXEC;
+#ifdef __AARCH64EB__
+       /* BE32 not support */
+       if ((eh->e_flags & EF_ARM_BE8) == 0)
+               return ENOEXEC;
+#endif
 
        /*
         * require aarch32 feature.