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powerpc/kgdb: Bail out of KGDB when we've been triggered

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We need to skip a breakpoint exception when it occurs after
a breakpoint has already been removed.

Signed-off-by: Tiejun Chen <[email protected]>
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
This commit is contained in:
Tiejun Chen authored and Benjamin Herrenschmidt committed 2012-08-24 20:26:05 +10:00
1 parent 572b411cb4
commit 949616cf2d
1 file changed
+15
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arch/powerpc/kernel/kgdb.c
+15
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@@ -101,6 +101,21 @@ static int computeSignal(unsigned int tt)
return SIGHUP; /* default for things we don't know about */
}
/**
*
* kgdb_skipexception - Bail out of KGDB when we've been triggered.
* @exception: Exception vector number
* @regs: Current &struct pt_regs.
*
* On some architectures we need to skip a breakpoint exception when
* it occurs after a breakpoint has been removed.
*
*/
int kgdb_skipexception(int exception, struct pt_regs *regs)
{
return kgdb_isremovedbreak(regs->nip);
}
static int kgdb_call_nmi_hook(struct pt_regs *regs)
{
kgdb_nmicallback(raw_smp_processor_id(), regs);