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x86/kprobes: Prevent kprobes to probe on save_args()

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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>
This commit is contained in:
Masami Hiramatsu 2010-11-18 19:16:55 +09:00 committed by Ingo Molnar
parent 94e8ba7286
commit de31ec8a31
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kernel/entry_64.S
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@ -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