Messages in this thread Patch in this message | | | Date | Fri, 15 Aug 2008 21:41:47 -0600 | From | jmerkey@wolfmoun ... | Subject | [PATCH 2.6.27-rc3 25/28] mdb: add a notify_die handler to panic.c |
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add a notify_die handler to hook the panic entry point prior to Linux "execve"-ing another kernel for crash analysis.
Signed-off-by: Jeffrey Vernon Merkey (jmerkey@wolfmountaingroup.com)
--- a/kernel/panic.c 2008-08-15 21:26:27.000000000 -0600 +++ b/kernel/panic.c 2008-08-15 15:41:57.000000000 -0600 @@ -21,6 +21,8 @@ #include <linux/debug_locks.h> #include <linux/random.h> #include <linux/kallsyms.h> +#include <linux/kdebug.h> + int panic_on_oops; int tainted; @@ -82,6 +84,13 @@ printk(KERN_EMERG "Kernel panic - not syncing: %s\n",buf); bust_spinlocks(0); + /* call the notify_die handler for any resident debuggers which + * may be active and pass the message string. On a software + * fault return at least some sort of regs for a remote debugger + * to look at. + */ + notify_die(DIE_PANIC, buf, get_irq_regs(), 0, 0, 0); + /* * If we have crashed and we have a crash kernel loaded let it handle * everything else.
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