[PATCH 5.10 020/148] x86: Add insn_decode_kernel()

Greg Kroah-Hartman
2022-07-23T09:57:41Z

From: Ben Hutchings <ben@decadent.org.uk>

This was done by commit 52fa82c21f64e900a72437269a5cc9e0034b424e
upstream, but this backport avoids changing all callers of the
old decoder API.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/insn.h | 2 ++
arch/x86/kernel/alternative.c | 2 +-
tools/arch/x86/include/asm/insn.h | 2 ++
3 files changed, 5 insertions(+), 1 deletion(-)

--- a/arch/x86/include/asm/insn.h
+++ b/arch/x86/include/asm/insn.h
@@ -105,6 +105,8 @@ enum insn_mode {

extern int insn_decode(struct insn *insn, const void *kaddr, int buf_len, enum insn_mode m);

+#define insn_decode_kernel(_insn, _ptr) insn_decode((_insn), (_ptr), MAX_INSN_SIZE, INSN_MODE_KERN)
+
/* Attribute will be determined after getting ModRM (for opcode groups) */
static inline void insn_get_attribute(struct insn *insn)
{
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -1290,7 +1290,7 @@ static void text_poke_loc_init(struct te
if (!emulate)
emulate = opcode;

- ret = insn_decode(&insn, emulate, MAX_INSN_SIZE, INSN_MODE_KERN);
+ ret = insn_decode_kernel(&insn, emulate);

BUG_ON(ret < 0);
BUG_ON(len != insn.length);
--- a/tools/arch/x86/include/asm/insn.h
+++ b/tools/arch/x86/include/asm/insn.h
@@ -105,6 +105,8 @@ enum insn_mode {

extern int insn_decode(struct insn *insn, const void *kaddr, int buf_len, enum insn_mode m);

+#define insn_decode_kernel(_insn, _ptr) insn_decode((_insn), (_ptr), MAX_INSN_SIZE, INSN_MODE_KERN)
+
/* Attribute will be determined after getting ModRM (for opcode groups) */
static inline void insn_get_attribute(struct insn *insn)
{