Re: ppc-eabi: interaction betwen section name attributes and -msdata

[jtc at redback dot com (J.T. Conklin)]

>>>>> "Geoff" == Geoff Keating <geoffk@geoffk.org> writes:
>> Would it be reasonable for gcc to pay attention to section attributes
>> to solve these problems?  I'm thinking along the lines of the small
>> data relocs being used used if:
>> 
>> * the size size of the data object is below the threshold and no
>> section attribute was specified.
>> or:
>> 
>> * the section attribute was one of the small data sections.

Geoff> I'd rather have an explicit __attribute__((sdata)) and
Geoff> __attribute__((nosdata)), or something.

If I understand correctly, there isn't support for a "no" prefix for
attributes.  Thus "sdata" and "nosdata" would be separate attributes,
allowing the ambiguity of __attribute__((sdata, nosdata)).  Nothing a
little documentation couldn't solve, but I'm a bit uncomfortable with
it.

Geoff> That way you don't have to parse section names in GCC.

It appears that rs6000_encode_section_info() does exactly that.  I'm
not sure how much good it does only there.  I was thinking of moving
that bit of code into it's own function, and re-using in the other
functions/macros that compare size against g_switch_value.

        --jtc

-- 
J.T. Conklin
RedBack Networks