Commit de31ec8a authored Nov 18, 2010 by Masami Hiramatsu Committed by Ingo Molnar Nov 18, 2010

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>

parent 94e8ba72

arch/x86/kernel/entry_64.S

+2 −0

Original line number	Diff line number	Diff line
		@@ -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