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Subject[PATCH 1/2] ARC: define __ALIGN_STR and __ALIGN symbols for ARC
Date
As of today ARC uses generic __ALIGN_STR and __ALIGN symbol
definitions from "include/linux/linkage.h"
They are defined to ".align 4,0x90" which instructed the assembler
to use `0x90` as a fill byte when aligning functions declared with
ENTRY or similar macroses. This leads to generated weird instructions
in code (when alignment is used) like "ldh_s r12,[r0,0x20]" which is
encoded as 0x9090 for ARCv2.

Let's use ".align 4" which insert a "nop_s" instruction instead.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
---
arch/arc/include/asm/linkage.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/arc/include/asm/linkage.h b/arch/arc/include/asm/linkage.h
index d9ee43c6b7db..fe19f1d412e7 100644
--- a/arch/arc/include/asm/linkage.h
+++ b/arch/arc/include/asm/linkage.h
@@ -29,6 +29,8 @@
.endm

#define ASM_NL ` /* use '`' to mark new line in macro */
+#define __ALIGN .align 4
+#define __ALIGN_STR __stringify(__ALIGN)

/* annotation for data we want in DCCM - if enabled in .config */
.macro ARCFP_DATA nm
--
2.21.1
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