Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb:
x86,kgdb: Fix hw breakpoint regression
+7
-2
+7
-2
arch/x86/kernel/kgdb.c
+7
-2
arch/x86/kernel/kgdb.c
···
572
572
return NOTIFY_STOP;
573
573
}
574
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575
-
#ifdef CONFIG_KGDB_LOW_LEVEL_TRAP
576
575
int kgdb_ll_trap(int cmd, const char *str,
577
576
struct pt_regs *regs, long err, int trap, int sig)
578
577
{
···
589
590
590
591
return __kgdb_notify(&args, cmd);
591
592
}
592
-
#endif /* CONFIG_KGDB_LOW_LEVEL_TRAP */
593
593
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594
static int
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595
kgdb_notify(struct notifier_block *self, unsigned long cmd, void *ptr)
···
623
625
return register_die_notifier(&kgdb_notifier);
624
626
}
625
627
628
+
static void kgdb_hw_overflow_handler(struct perf_event *event, int nmi,
629
+
struct perf_sample_data *data, struct pt_regs *regs)
630
+
{
631
+
kgdb_ll_trap(DIE_DEBUG, "debug", regs, 0, 0, SIGTRAP);
632
+
}
633
+
626
634
void kgdb_arch_late(void)
627
635
{
628
636
int i, cpu;
···
659
655
for_each_online_cpu(cpu) {
660
656
pevent = per_cpu_ptr(breakinfo[i].pev, cpu);
661
657
pevent[0]->hw.sample_period = 1;
658
+
pevent[0]->overflow_handler = kgdb_hw_overflow_handler;
662
659
if (pevent[0]->destroy != NULL) {
663
660
pevent[0]->destroy = NULL;
664
661
release_bp_slot(*pevent);