1 files changed, 48 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/asm-extable.h b/arch/arm64/include/asm/asm-extable.h
new file mode 100644
index 000000000000..986b4c0d4792
--- /dev/null
+++ b/arch/arm64/include/asm/asm-extable.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __ASM_ASM_EXTABLE_H
+#define __ASM_ASM_EXTABLE_H
+
+#ifdef __ASSEMBLY__
+
+#define __ASM_EXTABLE_RAW(insn, fixup)		\
+	.pushsection	__ex_table, "a";	\
+	.align		3;			\
+	.long		((insn) - .);		\
+	.long		((fixup) - .);		\
+	.popsection;
+
+/*
+ * Create an exception table entry for `insn`, which will branch to `fixup`
+ * when an unhandled fault is taken.
+ */
+	.macro		_asm_extable, insn, fixup
+	__ASM_EXTABLE_RAW(\insn, \fixup)
+	.endm
+
+/*
+ * Create an exception table entry for `insn` if `fixup` is provided. Otherwise
+ * do nothing.
+ */
+	.macro		_cond_extable, insn, fixup
+	.ifnc		\fixup,
+	_asm_extable	\insn, \fixup
+	.endif
+	.endm
+
+#else /* __ASSEMBLY__ */
+
+#include <linux/stringify.h>
+
+#define __ASM_EXTABLE_RAW(insn, fixup)		\
+	".pushsection	__ex_table, \"a\"\n"	\
+	".align		3\n"			\
+	".long		((" insn ") - .)\n"	\
+	".long		((" fixup ") - .)\n"	\
+	".popsection\n"
+
+#define _ASM_EXTABLE(insn, fixup) \
+	__ASM_EXTABLE_RAW(#insn, #fixup)
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ASM_ASM_EXTABLE_H */