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authorMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>2010-11-18 19:16:55 +0900
committerIngo Molnar <mingo@elte.hu>2010-11-18 13:40:19 +0100
commitde31ec8a31046111befd16a7083e3bdda2ff42cf (patch)
tree56eb69033dee2c2a81f69318408a71b0c937e582 /arch/x86
parent94e8ba728640dc01375a14e337f3b892bfacbeeb (diff)
x86/kprobes: Prevent kprobes to probe on save_args()
Prevent kprobes to probe on save_args() since this function will be called from breakpoint exception handler. That will cause infinit loop on breakpoint handling. Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: 2nddept-manager@sdl.hitachi.co.jp Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> LKML-Reference: <20101118101655.2779.2816.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/entry_64.S2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index fe2690d71c0..e3ba417e869 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -295,6 +295,7 @@ ENDPROC(native_usergs_sysret64)
.endm
/* save partial stack frame */
+ .pushsection .kprobes.text, "ax"
ENTRY(save_args)
XCPT_FRAME
cld
@@ -334,6 +335,7 @@ ENTRY(save_args)
ret
CFI_ENDPROC
END(save_args)
+ .popsection
ENTRY(save_rest)
PARTIAL_FRAME 1 REST_SKIP+8