Messages in this thread | | | Date | Mon, 12 Apr 2010 13:27:45 +0100 | From | Russell King <> | Subject | Re: [PATCH 1/23] Make register values available to panic notifiers |
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On Sun, Apr 11, 2010 at 11:06:09PM -0700, David VomLehn wrote: > This patch makes panic() and die() registers available to, for example, > panic notifier functions. Panic notifier functions are quite useful > for recording crash information, but they don't get passed the register > values. This makes it hard to print register contents, do stack > backtraces, etc. The changes in this patch save the register state when > panic() is called and introduce a function for die() to call that allows > it to pass in the registers it was passed.
Can you explain why you want this?
I'm wondering about the value of saving the registers; normally when a panic occurs, it's because of a well defined reason, and not because something went wrong in some CPU register; to put it another way, a panic() is a more controlled exception than a BUG() or a bad pointer dereference.
-- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of:
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