linux-kernel - Re: [RFC PATCH 00/27] ARM64: support ILP32

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Message-ID: <576958D3.5040401@arm.com>
Date:	Tue, 21 Jun 2016 16:10:11 +0100
From:	Szabolcs Nagy <szabolcs.nagy@....com>
To:	Yury Norov <ynorov@...iumnetworks.com>,
	<libc-alpha@...rceware.org>, <linux-kernel@...r.kernel.org>
CC:	<nd@....com>, <arnd@...db.de>, <catalin.marinas@....com>,
	<marcus.shawcroft@....com>, <philb@....org>, <davem@...emloft.net>,
	<maxim.kuvyrkov@...aro.org>, <joseph@...esourcery.com>,
	<pinskia@...il.com>
Subject: Re: [RFC PATCH 00/27] ARM64: support ILP32

On 21/06/16 06:06, Yury Norov wrote:
> This series enables aarch64 port with ilp32 mode.
> 
> After long discussions in kernel list, we finally got
> consensus on how ABI should look. This patchset adds
> support for the ABI in GLIBC. It is tested with LTP 
> with no big regressions comparing to LP64 and AARCH32.
> 
> Though it's very raw. Please be patient reviewing it.
> 

note that aarch64 hwcap is 64 bits, so there will be
an issue on ilp32 once more than 32 bits are used.

hwcap can be queried through getauxval and it is
passed to ifunc resolvers.

limiting hwcaps to 32bits may become a problem.