diff options
Diffstat (limited to 'arch/arm64/kernel/probes/decode-insn.c')
| -rw-r--r-- | arch/arm64/kernel/probes/decode-insn.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm64/kernel/probes/decode-insn.c b/arch/arm64/kernel/probes/decode-insn.c index 41b100bcb041..e05249f57075 100644 --- a/arch/arm64/kernel/probes/decode-insn.c +++ b/arch/arm64/kernel/probes/decode-insn.c @@ -76,6 +76,15 @@ enum probe_insn __kprobes arm_probe_decode_insn(u32 insn, struct arch_probe_insn *api) { /* + * While 'nop' instruction can execute in the out-of-line slot, + * simulating them in breakpoint handling offers better performance. + */ + if (aarch64_insn_is_nop(insn)) { + api->handler = simulate_nop; + return INSN_GOOD_NO_SLOT; + } + + /* * Instructions reading or modifying the PC won't work from the XOL * slot. */ |