[src/trunk]: src/sys/arch/arm Add EF_ARM_BE8

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

details:   https://anonhg.NetBSD.org/src/rev/1042c8f9d83a
branches:  trunk
changeset: 789039:1042c8f9d83a
user:      matt <matt%NetBSD.org@localhost>
date:      Mon Aug 05 00:57:24 2013 +0000

description:
Add EF_ARM_BE8
Make sure that running a program, that it right big-endian format for the
processor. (BE8 for armv7, BE32 for all others).

diffstat:

 sys/arch/arm/arm/cpu_exec.c        |  16 ++++++++++++++--
 sys/arch/arm/include/elf_machdep.h |   3 ++-
 2 files changed, 16 insertions(+), 3 deletions(-)

diffs (54 lines):

diff -r fa0305dc73c5 -r 1042c8f9d83a sys/arch/arm/arm/cpu_exec.c
--- a/sys/arch/arm/arm/cpu_exec.c       Mon Aug 05 00:28:52 2013 +0000
+++ b/sys/arch/arm/arm/cpu_exec.c       Mon Aug 05 00:57:24 2013 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: cpu_exec.c,v 1.3 2012/08/11 07:18:53 matt Exp $        */
+/*     $NetBSD: cpu_exec.c,v 1.4 2013/08/05 00:57:24 matt Exp $        */
 
 /*-
  * Copyright (c) 2012 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: cpu_exec.c,v 1.3 2012/08/11 07:18:53 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: cpu_exec.c,v 1.4 2013/08/05 00:57:24 matt Exp $");
 
 #include "opt_compat_netbsd.h"
 #include "opt_compat_netbsd32.h"
@@ -68,6 +68,18 @@
 #else
        const bool aapcs_p = false;
 #endif
+#ifdef __ARMEB__
+       const bool be8_p = (eh->e_flags & EF_ARM_BE8) != 0;
+
+       /*
+        * If the BE-8 model is supported, CPSR[7] will be clear.
+        * If the BE-32 model is supported, CPSR[7] will be set.
+        */
+       register_t cpsr;
+       __asm("mrs\t%0, cpsr" : "=r"(cpsr));
+       if ((cpsr & CPU_CONTROL_BEND_ENABLE) == be8_p)
+               return ENOEXEC;
+#endif /* __ARMEB__ */
 
        /*
         * This is subtle.  If are netbsd32, then we don't want to match the
diff -r fa0305dc73c5 -r 1042c8f9d83a sys/arch/arm/include/elf_machdep.h
--- a/sys/arch/arm/include/elf_machdep.h        Mon Aug 05 00:28:52 2013 +0000
+++ b/sys/arch/arm/include/elf_machdep.h        Mon Aug 05 00:57:24 2013 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: elf_machdep.h,v 1.11 2013/04/24 22:35:23 matt Exp $    */
+/*     $NetBSD: elf_machdep.h,v 1.12 2013/08/05 00:57:24 matt Exp $    */
 
 #ifndef _ARM_ELF_MACHDEP_H_
 #define _ARM_ELF_MACHDEP_H_
@@ -27,6 +27,7 @@
 #define EF_ARM_NEW_ABI         0x00000080
 #define EF_ARM_OLD_ABI         0x00000100
 #define EF_ARM_SOFT_FLOAT      0x00000200
+#define EF_ARM_BE8             0x00800000
 #define EF_ARM_EABIMASK                0xff000000
 #define        EF_ARM_EABI_VER1        0x01000000
 #define        EF_ARM_EABI_VER2        0x02000000