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Re: [patch] getauxval.3 correct AT_HWCAP result description
- From: Steven Munroe <munroesj at linux dot vnet dot ibm dot com>
- To: Szabolcs Nagy <szabolcs dot nagy at arm dot com>
- Cc: "Michael Kerrisk (man-pages)" <mtk dot manpages at gmail dot com>, "Cownie, James H" <james dot h dot cownie at intel dot com>, nd at arm dot com, "libc-alpha at sourceware dot org" <libc-alpha at sourceware dot org>, "linux-man at vger dot kernel dot org" <linux-man at vger dot kernel dot org>
- Date: Thu, 04 Aug 2016 15:35:43 -0500
- Subject: Re: [patch] getauxval.3 correct AT_HWCAP result description
- Authentication-results: sourceware.org; auth=none
- References: <397D95928DECEF49983F5B237627E9785733058A@IRSMSX108.ger.corp.intel.com> <2b181d0f-3a50-bf18-268b-9991de75d216@gmail.com> <5785F835.4070209@arm.com>
- Reply-to: munroesj at linux dot vnet dot ibm dot com
On Wed, 2016-07-13 at 09:13 +0100, Szabolcs Nagy wrote:
> On 12/07/16 21:24, Michael Kerrisk (man-pages) wrote:
> >> .BR AT_HWCAP
> >> -A pointer to a multibyte mask of bits whose settings
> >> +A four byte long bit-mask whose settings
> >> indicate detailed processor capabilities.
>
> why is it four byte long?
>
> it's a long and the target abi decides how many
> bits of that is used.
>
For platforms that support 32- and 64-bit modes, maintaining AT_HWCAP at
32-bits simplifies code portability.