On Tue, Jan 06, 2009 at 09:44:35AM +1100, Keith Owens wrote: > AFAICR when Andi Kleen was adding AMD64 support to Linux, he defined > some die notifiers for AMD64. At the time those die notifiers were not > in i386. I took advantage of the notifier to simplify kdb for AMD64. > > There is no reason not to use the i386 die notifiers now, as long as > the semantics are the same. At one stage i386 and x86_64 used the same > notifier names but with slightly different meanings.
The die notifier implementation now lives in kernel/notifier.c and is shared by all platforms. The actual notifier values used by kdb are: - DIE_NMI_IPI: implemented by x86 - DIE_OOPS: implemented by most (all?) architectures - DIE_CALL: not implemented by any architecture, define by a few - DIE_DEBUG: implemented by x86 - DIE_NMIWATCHDOG: implemented by x86, defined but not implemented by s390 - DIE_INT3: implemented by x86 only if CONFIG_KPROBES is set all the x86 implementations are in code shared by 32bit and 64bit mode. Note that some code is rather weird now, e.g. the x86 do_debug directly calling into kdb and in the next line calling into it through DIE_DEBUG with both of them happening for 32 and 64 bits. _______________________________________________ kdb mailing list [email protected] http://oss.sgi.com/mailman/listinfo/kdb
