* [PATCH -tip ] [BUGFIX] x86/kprobes: Prevent kprobes to probe on save_args
@ 2010-11-18 10:16 Masami Hiramatsu
2010-11-18 14:14 ` [tip:perf/urgent] x86/kprobes: Prevent kprobes to probe on save_args() tip-bot for Masami Hiramatsu
0 siblings, 1 reply; 2+ messages in thread
From: Masami Hiramatsu @ 2010-11-18 10:16 UTC (permalink / raw)
To: Ingo Molnar
Cc: linux-kernel, 2nddept-manager, Masami Hiramatsu,
Ananth N Mavinakayanahalli, Thomas Gleixner, Ingo Molnar,
H. Peter Anvin, x86, linux-kernel
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: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Cc: linux-kernel@vger.kernel.org
---
arch/x86/kernel/entry_64.S | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index fe2690d..e3ba417 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
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [tip:perf/urgent] x86/kprobes: Prevent kprobes to probe on save_args()
2010-11-18 10:16 [PATCH -tip ] [BUGFIX] x86/kprobes: Prevent kprobes to probe on save_args Masami Hiramatsu
@ 2010-11-18 14:14 ` tip-bot for Masami Hiramatsu
0 siblings, 0 replies; 2+ messages in thread
From: tip-bot for Masami Hiramatsu @ 2010-11-18 14:14 UTC (permalink / raw)
To: linux-tip-commits
Cc: linux-kernel, ananth, hpa, mingo, masami.hiramatsu.pt, tglx,
mingo
Commit-ID: de31ec8a31046111befd16a7083e3bdda2ff42cf
Gitweb: http://git.kernel.org/tip/de31ec8a31046111befd16a7083e3bdda2ff42cf
Author: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
AuthorDate: Thu, 18 Nov 2010 19:16:55 +0900
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Thu, 18 Nov 2010 13:40:19 +0100
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>
---
arch/x86/kernel/entry_64.S | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index fe2690d..e3ba417 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
^ permalink raw reply related [flat|nested] 2+ messages in thread
end of thread, other threads:[~2010-11-18 14:14 UTC | newest]
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2010-11-18 10:16 [PATCH -tip ] [BUGFIX] x86/kprobes: Prevent kprobes to probe on save_args Masami Hiramatsu
2010-11-18 14:14 ` [tip:perf/urgent] x86/kprobes: Prevent kprobes to probe on save_args() tip-bot for Masami Hiramatsu
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