ARM hard-float ABI: add ldconfig flag value

[Steve McIntyre]

Hi Roland,

On Thu, Aug 02, 2012 at 10:28:43AM -0700, Roland McGrath wrote:
>libc-ports@sourceware.org is the right list for discussing ARM.

Ah, OK. I'd seen the mergeback of ports and guessed wrong for the
mailing list. Apologies for that.

>OSABI is used in a generic way and should not be used for machine-specific
>purposes.

Are you sure? Various docs say that values above 64 are specifically
set aside for machine-specific values, hence why I'm looking at using
65 and 66 here.

>An e_flags (EF_*) bit is probably a better choice.  There are
>already these bits (among others):
>	#define EF_ARM_SOFT_FLOAT	0x200
>	#define EF_ARM_VFP_FLOAT	0x400
>	#define EF_ARM_MAVERICK_FLOAT	0x800
>But I don't know the history of their use.  Off hand EF_ARM_VFP_FLOAT seems
>like it's already what you want, but maybe it has a different meaning (like
>just that it uses VFP, not that the ABI specifies using VFP registers in
>the calling convention).

Exactly, those values are describing needed/used hardware, not ABI.

Cheers,
-- 
Steve McIntyre                                steve.mcintyre@linaro.org
<http://www.linaro.org/> Linaro.org | Open source software for ARM SoCs