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| author | Jason Wessel <jason.wessel@windriver.com> | 2010-05-20 21:04:27 -0500 |
|---|---|---|
| committer | Jason Wessel <jason.wessel@windriver.com> | 2010-05-20 21:04:27 -0500 |
| commit | 6d90634076200af035f1d9dcc8fc11acefd603e9 (patch) | |
| tree | f56c723a28006df0425bf662c15e2a3503b9065a | |
| parent | d37d39ae3b4a8f9a21114921fb344fe7cadb1abd (diff) | |
| download | linux-6d90634076200af035f1d9dcc8fc11acefd603e9.tar.gz linux-6d90634076200af035f1d9dcc8fc11acefd603e9.tar.bz2 linux-6d90634076200af035f1d9dcc8fc11acefd603e9.zip | |
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>
| -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 fff59019cca0..b38bb25dbbb3 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: */ 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 * master cpu and acquire the kgdb_active lock: |