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x86: Clean up and extend do_int3()

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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>
This commit is contained in:
Srikar Dronamraju 2011-10-25 19:51:59 +05:30 • committed by Ingo Molnar
parent 3596ff4e6b
commit cc3a1bf52a
1 changed files with 1 additions and 6 deletions
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7
arch/x86/kernel/traps.c
View file

@ -306,15 +306,10 @@ dotraplinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
== NOTIFY_STOP) == NOTIFY_STOP)
return; return;
#endif /* CONFIG_KGDB_LOW_LEVEL_TRAP */ #endif /* CONFIG_KGDB_LOW_LEVEL_TRAP */
#ifdef CONFIG_KPROBES
if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP) if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
== NOTIFY_STOP) == NOTIFY_STOP)
return; return;
#else
if (notify_die(DIE_TRAP, "int3", regs, error_code, 3, SIGTRAP)
== NOTIFY_STOP)
return;
#endif
preempt_conditional_sti(regs); preempt_conditional_sti(regs);
do_trap(3, SIGTRAP, "int3", regs, error_code, NULL); do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);