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Subject[tip:x86/asm] x86: Clean up and extend do_int3()
Commit-ID:  cc3a1bf52a9d2808c7cd6e8f413b02b650b6b84b
Gitweb: http://git.kernel.org/tip/cc3a1bf52a9d2808c7cd6e8f413b02b650b6b84b
Author: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
AuthorDate: Tue, 25 Oct 2011 19:51:59 +0530
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Tue, 6 Dec 2011 08:20:37 +0100

x86: Clean up and extend do_int3()

Since there is a possibility of !KPROBES int3 listeners
(such as kgdb) and since DIE_TRAP is currently not being
used by anybody, notify all listeners with DIE_INT3.

Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/20111025142159.GB21225@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/kernel/traps.c | 7 +------
1 files changed, 1 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index a8e3eb8..fa1191f 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -306,15 +306,10 @@ dotraplinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
== NOTIFY_STOP)
return;
#endif /* CONFIG_KGDB_LOW_LEVEL_TRAP */
-#ifdef CONFIG_KPROBES
+
if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
== NOTIFY_STOP)
return;
-#else
- if (notify_die(DIE_TRAP, "int3", regs, error_code, 3, SIGTRAP)
- == NOTIFY_STOP)
- return;
-#endif

preempt_conditional_sti(regs);
do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);

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