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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 <tiejun.chen@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Tiejun Chen 2012-08-22 16:10:19 +00:00 • committed by Benjamin Herrenschmidt
parent 572b411cb4
commit 949616cf2d
1 changed files with 15 additions and 0 deletions
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15
arch/powerpc/kernel/kgdb.c
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@ -101,6 +101,21 @@ static int computeSignal(unsigned int tt)
return SIGHUP; /* default for things we don't know about */ 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) static int kgdb_call_nmi_hook(struct pt_regs *regs)
{ {
kgdb_nmicallback(raw_smp_processor_id(), regs); kgdb_nmicallback(raw_smp_processor_id(), regs);