Instead of __kprobes annotation, introduce 'nokprobe' new annotation
to annotate that the function is not probed by kprobes.
Previously the '__kprobes' is used just for avoiding probes on
kprobes-related functions which will be used from kprobes. However
nowadays we use it for prohibiting probing the functions implicitly
invoked from kprobes int3 handler, since that causes infinit-loop
lockup or sudden reboot. In this case, the annotated functions are
not limited in the kprobes-related functions, and __kprobes looks
very confusing. (Moreover, actually, most of control-side kprobes
functions like as register_kprobes() are safely probed by kprobes)
Thus, we decide to introduce 'nokprobe' new annotation. We leave
"__kprobes" just for compatibility but it should be replaced or
removed eventually.
New commits must use 'nokprobe' for this purpose.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu...@hitachi.com>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Ananth N Mavinakayanahalli <ana...@in.ibm.com>
Cc: "David S. Miller" <da...@davemloft.net>
---
include/linux/compiler.h | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 92669cd..173c64e 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -353,8 +353,10 @@ void ftrace_likely_update(struct ftrace_branch_data *f,
int val, int expect);
/* Ignore/forbid kprobes attach on very low level functions marked by this
attribute: */
#ifdef CONFIG_KPROBES
-# define __kprobes __attribute__((__section__(".kprobes.text")))
+# define nokprobe __attribute__((__section__(".kprobes.text")))
#else
-# define __kprobes
+# define nokprobe
#endif
+#define __kprobes nokprobe
+
#endif /* __LINUX_COMPILER_H */
--
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