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| author | Jason Wessel <jason.wessel@windriver.com> | 2010-05-20 21:04:26 -0500 |
|---|---|---|
| committer | Jason Wessel <jason.wessel@windriver.com> | 2010-05-20 21:04:26 -0500 |
| commit | 5dd11d5d47d248850c58292513f0e164ba98b01e (patch) | |
| tree | fd3c5f27dd40d6a483483de3644ca060a5cafd75 /lib | |
| parent | ba797b28131b1f1367b662936ea370239d603cff (diff) | |
| download | linux-5dd11d5d47d248850c58292513f0e164ba98b01e.tar.bz2 | |
mips,kgdb: kdb low level trap catch and stack trace
The only way the debugger can handle a trap in inside rcu_lock,
notify_die, or atomic_notifier_call_chain without a recursive fault is
to have a low level "first opportunity handler" do_trap_or_bp() handler.
Generally this will be something the vast majority of folks will not
need, but for those who need it, it is added as a kernel .config
option called KGDB_LOW_LEVEL_TRAP.
Also added was a die notification for oops such that kdb can catch an
oops for analysis.
There appeared to be no obvious way to pass the struct pt_regs from
the original exception back to the stack back tracer, so a special
case was added to show_stack() for when kdb is active because you
generally desire to generally look at the back trace of the original
exception.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.kgdb | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Kconfig.kgdb b/lib/Kconfig.kgdb index c56ccb4ad292..43cb93fa2651 100644 --- a/lib/Kconfig.kgdb +++ b/lib/Kconfig.kgdb @@ -59,7 +59,7 @@ config KGDB_TESTS_BOOT_STRING config KGDB_LOW_LEVEL_TRAP bool "KGDB: Allow debugging with traps in notifiers" - depends on X86 + depends on X86 || MIPS default n help This will add an extra call back to kgdb for the breakpoint |