cvs commit: src/sys/amd64/amd64 db_trace.c exception.S machdep.c trap.c

John Baldwin jhb at
Thu Nov 15 14:26:44 PST 2007

On Thursday 15 November 2007 05:00:57 pm John Baldwin wrote:
> jhb         2007-11-15 22:00:57 UTC
>   FreeBSD src repository
>   Modified files:
>     sys/amd64/amd64      db_trace.c exception.S machdep.c trap.c 
>   Log:
>   Add support for cross double fault frames in stack traces:
>   - Populate the register values for the trapframe put on the stack by the
>     double fault handler.
>   - Teach DDB's trace routine to treat a double fault like other trap 
>   MFC after:      3 days

As an aside, because amd64 uses much saner stack frames than i386, kgdb will 
trace across a double fault just fine w/o any further patches if the kernel 
has this fix.

John Baldwin

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