Messages in this thread Patch in this message |  | | From | Xiongfeng Wang <> | Subject | [RFC PATCH] kprobes/arm64: Blacklist functions called in '_sdei_handler' | Date | Sat, 20 Apr 2019 17:06:57 +0800 |
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Functions called in '_sdei_handler' are needed to be marked as 'nokprobe'.
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
--- When I kprobe 'sdei_smccc_smc', the cpu hungs. I am not sure if it is becase when SDEI events interrupt EL0, '__sdei_asm_entry_trampoline' didn't restore vbar_el1 with kernel vectors. Or is it becasue brk exception corrupt elr_el1 and trust firmware didn't preserve it for us? --- drivers/firmware/arm_sdei.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/firmware/arm_sdei.c b/drivers/firmware/arm_sdei.c index e6376f9..9cd70d1 100644 --- a/drivers/firmware/arm_sdei.c +++ b/drivers/firmware/arm_sdei.c @@ -165,6 +165,7 @@ static int invoke_sdei_fn(unsigned long function_id, unsigned long arg0, return err; } +NOKPROBE_SYMBOL(invoke_sdei_fn); static struct sdei_event *sdei_event_find(u32 event_num) { @@ -879,6 +880,7 @@ static void sdei_smccc_smc(unsigned long function_id, { arm_smccc_smc(function_id, arg0, arg1, arg2, arg3, arg4, 0, 0, res); } +NOKPROBE_SYMBOL(sdei_smccc_smc); static void sdei_smccc_hvc(unsigned long function_id, unsigned long arg0, unsigned long arg1, @@ -887,6 +889,7 @@ static void sdei_smccc_hvc(unsigned long function_id, { arm_smccc_hvc(function_id, arg0, arg1, arg2, arg3, arg4, 0, 0, res); } +NOKPROBE_SYMBOL(sdei_smccc_hvc); int sdei_register_ghes(struct ghes *ghes, sdei_event_callback *normal_cb, sdei_event_callback *critical_cb) -- 1.7.12.4
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