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authorJason Wessel <jason.wessel@windriver.com>2010-08-05 09:22:22 -0500
committerJason Wessel <jason.wessel@windriver.com>2010-08-05 09:22:22 -0500
commit62a0309c4c99274052e4829ed6a8fe579dd2c767 (patch)
tree47239d879832caebb5b514d67d486f3c52480784 /arch/arm/kernel/kgdb.c
parent6d855b1d83c980c1283d98d2d63a2bd3a87e21b7 (diff)
downloadlinux-sh-62a0309c4c99274052e4829ed6a8fe579dd2c767.tar.gz
arm,kgdb: Add ability to trap into debugger on notify_die
Now that ARM implements the notify die handlers, add the ability for the kernel debugger to receive the notifications. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> CC: Russell King <linux@arm.linux.org.uk> CC: linux-arm-kernel@lists.infradead.org
Diffstat (limited to 'arch/arm/kernel/kgdb.c')
-rw-r--r--arch/arm/kernel/kgdb.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/arm/kernel/kgdb.c b/arch/arm/kernel/kgdb.c
index cf846cade354..778c2f7024ff 100644
--- a/arch/arm/kernel/kgdb.c
+++ b/arch/arm/kernel/kgdb.c
@@ -10,6 +10,7 @@
* Deepak Saxena <dsaxena@plexity.net>
*/
#include <linux/irq.h>
+#include <linux/kdebug.h>
#include <linux/kgdb.h>
#include <asm/traps.h>
@@ -180,6 +181,33 @@ void kgdb_roundup_cpus(unsigned long flags)
local_irq_disable();
}
+static int __kgdb_notify(struct die_args *args, unsigned long cmd)
+{
+ struct pt_regs *regs = args->regs;
+
+ if (kgdb_handle_exception(1, args->signr, cmd, regs))
+ return NOTIFY_DONE;
+ return NOTIFY_STOP;
+}
+static int
+kgdb_notify(struct notifier_block *self, unsigned long cmd, void *ptr)
+{
+ unsigned long flags;
+ int ret;
+
+ local_irq_save(flags);
+ ret = __kgdb_notify(ptr, cmd);
+ local_irq_restore(flags);
+
+ return ret;
+}
+
+static struct notifier_block kgdb_notifier = {
+ .notifier_call = kgdb_notify,
+ .priority = -INT_MAX,
+};
+
+
/**
* kgdb_arch_init - Perform any architecture specific initalization.
*
@@ -188,6 +216,11 @@ void kgdb_roundup_cpus(unsigned long flags)
*/
int kgdb_arch_init(void)
{
+ int ret = register_die_notifier(&kgdb_notifier);
+
+ if (ret != 0)
+ return ret;
+
register_undef_hook(&kgdb_brkpt_hook);
register_undef_hook(&kgdb_compiled_brkpt_hook);
@@ -204,6 +237,7 @@ void kgdb_arch_exit(void)
{
unregister_undef_hook(&kgdb_brkpt_hook);
unregister_undef_hook(&kgdb_compiled_brkpt_hook);
+ unregister_die_notifier(&kgdb_notifier);
}
/*