Messages in this thread Patch in this message | | | From | Wang Nan <> | Subject | [RFC PATCH v4 05/34] early kprobes: introduce kprobe_is_early for futher early kprobe use. | Date | Mon, 2 Mar 2015 22:24:43 +0800 |
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Following early kprobe patches will enable kprobe registering very early, even before kprobe system initialized. kprobe_is_early() can be used to check whether we are working on early kprobes.
Signed-off-by: Wang Nan <wangnan0@huawei.com> --- include/linux/kprobes.h | 2 ++ kernel/kprobes.c | 6 ++++++ 2 files changed, 8 insertions(+)
diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h index 1ab5475..a3de759 100644 --- a/include/linux/kprobes.h +++ b/include/linux/kprobes.h @@ -50,6 +50,8 @@ #define KPROBE_REENTER 0x00000004 #define KPROBE_HIT_SSDONE 0x00000008 +extern bool kprobes_is_early(void); + #else /* CONFIG_KPROBES */ typedef int kprobe_opcode_t; struct arch_specific_insn { diff --git a/kernel/kprobes.c b/kernel/kprobes.c index 427d761..2e728a4 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -69,6 +69,12 @@ static int kprobes_initialized; static int kprobes_blacklist_initialized; + +bool kprobes_is_early(void) +{ + return !(kprobes_initialized && kprobes_blacklist_initialized); +} + static struct hlist_head kprobe_table[KPROBE_TABLE_SIZE]; static struct hlist_head kretprobe_inst_table[KPROBE_TABLE_SIZE]; -- 1.8.4
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