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Commit 6d906340 authored by Jason Wessel's avatar Jason Wessel
Browse files

debug_core,kdb: Allow the debug core to process a recursive debug entry 



This allows kdb to debug a crash with in the kms code with a
single level recursive re-entry.

Signed-off-by: default avatarJason Wessel <jason.wessel@windriver.com>
parent d37d39ae

kernel/debug/debug_core.c

+7 −0
Original line number Original line Diff line number Diff line
@@ -445,6 +445,10 @@ static int kgdb_reenter_check(struct kgdb_state *ks) 
	}

	}





	printk(KERN_CRIT "KGDB: re-enter exception: ALL breakpoints killed\n");

	printk(KERN_CRIT "KGDB: re-enter exception: ALL breakpoints killed\n");

#ifdef CONFIG_KGDB_KDB

	/* Allow kdb to debug itself one level */

	return 0;

#endif

	dump_stack();

	dump_stack();

	panic("Recursive entry to debugger");

	panic("Recursive entry to debugger");
@@ -489,6 +493,9 @@ acquirelock: 
	 */

	 */

	atomic_inc(&cpu_in_kgdb[cpu]);

	atomic_inc(&cpu_in_kgdb[cpu]);





	if (exception_level == 1)

		goto cpu_master_loop;



	/*

	/*

	 * CPU will loop if it is a slave or request to become a kgdb

	 * CPU will loop if it is a slave or request to become a kgdb

	 * master cpu and acquire the kgdb_active lock:

	 * master cpu and acquire the kgdb_active lock: