Messages in this thread Patch in this message |  | | | From | Jason Wessel <> | | Subject | [PATCH 24/28] debug_core,kdb: Allow the debug core to process a recursive debug entry | | Date | Fri, 12 Feb 2010 16:35:39 -0600 |
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This allows kdb to debug a crash with in the kms code with a single level recursive re-entry.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com> --- kernel/debug/debug_core.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c index ef46af3..bfdba97 100644 --- a/kernel/debug/debug_core.c +++ b/kernel/debug/debug_core.c @@ -445,6 +445,10 @@ static int kgdb_reenter_check(struct kgdb_state *ks) } 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(); panic("Recursive entry to debugger"); @@ -489,6 +493,9 @@ acquirelock: smp_wmb(); atomic_set(&cpu_in_kgdb[cpu], 1); + if (exception_level == 1) + goto cpu_master_loop; + /* * CPU will loop if it is a slave or request to become a kgdb * master cpu and acquire the kgdb_active lock: -- 1.6.4.rc1
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