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| author | Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> | 2014-04-17 17:17:26 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-04-24 10:02:58 +0200 |
| commit | 98def1dedd00f42ded8423c418c971751f46aad2 (patch) | |
| tree | 33852494b1b3f98dcf26e30a9cc8a4cb8949ac44 /arch/x86/lib/thunk_32.S | |
| parent | 8027197220e02d5cebbbfdff36c2827661fbc692 (diff) | |
| download | blackbird-op-linux-98def1dedd00f42ded8423c418c971751f46aad2.tar.gz blackbird-op-linux-98def1dedd00f42ded8423c418c971751f46aad2.zip | |
kprobes, x86: Prohibit probing on thunk functions and restore
thunk/restore functions are also used for tracing irqoff etc.
and those are involved in kprobe's exception handling.
Prohibit probing on them to avoid kernel crash.
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20140417081726.26341.3872.stgit@ltc230.yrl.intra.hitachi.co.jp
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/lib/thunk_32.S')
| -rw-r--r-- | arch/x86/lib/thunk_32.S | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/lib/thunk_32.S b/arch/x86/lib/thunk_32.S index 2930ae05d773..28f85c916712 100644 --- a/arch/x86/lib/thunk_32.S +++ b/arch/x86/lib/thunk_32.S @@ -4,8 +4,8 @@ * (inspired by Andi Kleen's thunk_64.S) * Subject to the GNU public license, v.2. No warranty of any kind. */ - #include <linux/linkage.h> + #include <asm/asm.h> #ifdef CONFIG_TRACE_IRQFLAGS /* put return address in eax (arg1) */ @@ -22,6 +22,7 @@ popl %ecx popl %eax ret + _ASM_NOKPROBE(\name) .endm thunk_ra trace_hardirqs_on_thunk,trace_hardirqs_on_caller |
