Commit edbcf50e authored by Jean-Philippe Brucker's avatar Jean-Philippe Brucker Committed by Will Deacon

arm64: insn: Add BUILD_BUG_ON() for invalid masks

Detect invalid instruction masks at build time. Some versions of GCC can
warn about the situation, but not all of them, it seems.
Suggested-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarJean-Philippe Brucker <jean-philippe.brucker@arm.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent c5e2edeb
......@@ -18,6 +18,7 @@
*/
#ifndef __ASM_INSN_H
#define __ASM_INSN_H
#include <linux/build_bug.h>
#include <linux/types.h>
/* A64 instructions are always 32 bits. */
......@@ -268,9 +269,14 @@ enum aarch64_insn_adr_type {
#define __AARCH64_INSN_FUNCS(abbr, mask, val) \
static __always_inline bool aarch64_insn_is_##abbr(u32 code) \
{ return (code & (mask)) == (val); } \
{ \
BUILD_BUG_ON(~(mask) & (val)); \
return (code & (mask)) == (val); \
} \
static __always_inline u32 aarch64_insn_get_##abbr##_value(void) \
{ return (val); }
{ \
return (val); \
}
__AARCH64_INSN_FUNCS(adr, 0x9F000000, 0x10000000)
__AARCH64_INSN_FUNCS(adrp, 0x9F000000, 0x90000000)
......
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