linux-kernel - [PATCH 14/14] csky: Add EM_CSKY

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Date:   Mon, 31 Dec 2018 23:33:04 +0800
From:   guoren@...nel.org
To:     arnd@...db.de
Cc:     guoren@...nel.org, linux-kernel@...r.kernel.org,
        rostedt@...dmis.org, mingo@...hat.com, oleg@...hat.com,
        linux-arch@...r.kernel.org, Guo Ren <ren_guo@...ky.com>
Subject: [PATCH 14/14] csky: Add EM_CSKY_OLD 39

From: Guo Ren <ren_guo@...ky.com>

C-SKY historically used 39, the same value as MCORE, from which the
architecture was derived.

C-SKY binutils support both EM_CSKY and EM_CSKY_OLD, confirmed by
binutils:include/elf/common.h

Signed-off-by: Guo Ren <ren_guo@...ky.com>
---
 arch/csky/include/asm/elf.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/csky/include/asm/elf.h b/arch/csky/include/asm/elf.h
index d6dbc00..e1ec558 100644
--- a/arch/csky/include/asm/elf.h
+++ b/arch/csky/include/asm/elf.h
@@ -8,6 +8,7 @@
 #include <abi/regdef.h>
 
 #define ELF_ARCH EM_CSKY
+#define EM_CSKY_OLD 39
 
 /* CSKY Relocations */
 #define R_CSKY_NONE               0
@@ -43,7 +44,8 @@ typedef elf_greg_t elf_gregset_t[ELF_NGREG];
 /*
  * This is used to ensure we don't load something for the wrong architecture.
  */
-#define elf_check_arch(x) ((x)->e_machine == ELF_ARCH)
+#define elf_check_arch(x) (((x)->e_machine == ELF_ARCH) || \
+			   ((x)->e_machine == EM_CSKY_OLD))
 
 /*
  * These are used to set parameters in the core dumps.
-- 
2.7.4