diff options
| author | Jason Wessel <jason.wessel@windriver.com> | 2010-01-15 07:20:23 -0600 |
|---|---|---|
| committer | Jason Wessel <jason.wessel@windriver.com> | 2010-01-15 07:20:23 -0600 |
| commit | e1ad0cb5a498bb0563b0302f5a6ba8a0ca92c53b (patch) | |
| tree | 4b6ce647cf1c12a4163a4859523a21d54c78133d /kernel | |
| parent | 95251035d9a54a8f148a1c940aa4fc661e58105d (diff) | |
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: Jason Wessel <jason.wessel@windriver.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | 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 e02c5528fc93..344e3328f9f0 100644 --- a/kernel/debug/debug_core.c +++ b/kernel/debug/debug_core.c @@ -443,6 +443,10 @@ 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"); @@ -487,6 +491,9 @@ 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: |