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Re: supporting DW_OP_{implicit,stack}_value
- From: Mark Wielaard <mjw at redhat dot com>
- To: elfutils-devel at lists dot fedorahosted dot org
- Date: Thu, 23 Jul 2009 11:58:32 +0200
- Subject: Re: supporting DW_OP_{implicit,stack}_value
On Wed, 2009-07-22 at 15:57 -0700, Roland McGrath wrote:
> I've now done what you suggested, but further changed both
> dwarf_frame_{cfa,register} to return only 0/-1 and fill in *nops,
> so they match dwarf_getlocation.
>
> Note that dwarf_frame_cfa still returns only a DWARF expression, not a
> location description, i.e. it has no DW_OP_stack_value suffix (which would
> always be there for a location description for the CFA, which is never
> mutable). This means you can actually just replace DW_OP_call_frame_cfa
> directly with this sequence of ops and it has exactly the right meaning.
Thanks, I have adjusted systemtap to take advantage of the new
interface.
Cheers,
Mark