[RFC PATCH v0 13/19] x86/uprobes: Convert to insn_decode()

Borislav Petkov
2020-11-24T10:20:25Z

Simplify code, no functional changes.

Signed-off-by: Borislav Petkov <bp@suse.de>
---
arch/x86/kernel/uprobes.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/uprobes.c b/arch/x86/kernel/uprobes.c
index 3fdaa042823d..e5759310f499 100644
--- a/arch/x86/kernel/uprobes.c
+++ b/arch/x86/kernel/uprobes.c
@@ -275,12 +275,12 @@ static bool is_prefix_bad(struct insn *insn)

static int uprobe_init_insn(struct arch_uprobe *auprobe, struct insn *insn, bool x86_64)
{
+ enum insn_mode m = x86_64 ? INSN_MODE_64 : INSN_MODE_32;
u32 volatile *good_insns;
+ int ret;

- insn_init(insn, auprobe->insn, sizeof(auprobe->insn), x86_64);
- /* has the side-effect of processing the entire instruction */
- insn_get_length(insn);
- if (!insn_complete(insn))
+ ret = insn_decode(insn, auprobe->insn, sizeof(auprobe->insn), m);
+ if (ret < 0)
return -ENOEXEC;

if (is_prefix_bad(insn))
--
2.21.0