Re: Use DWARF CFI frame unwinder on powerpc

[Andreas Schwab <schwab@suse.de>]

PAUL GILLIAM <pgilliam@us.ibm.com> writes:

>>>>>During symbol reading, incomplete CFI data; unspecified registers
>>>>>(e.g., r0) at 0x10000464.

That is presumably a gcc problem:

	/* NOTE: cagney/2003-09-05: CFI should specify the disposition
	   of all debug info registers.  If it doesn't, complain (but
	   not too loudly).  It turns out that GCC assumes that an
	   unspecified register implies "same value" when CFI (draft
	   7) specifies nothing at all.  Such a register could equally
	   be interpreted as "undefined".  Also note that this check
	   isn't sufficient; it only checks that all registers in the
	   range [0 .. max column] are specified, and won't detect
	   problems when a debug info register falls outside of the
	   table.  We need a way of iterating through all the valid
	   DWARF2 register numbers.  */

Andreas.

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Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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