linux-kernel - Re: [PATCH v6 01/19] arm64:ilp32: add documentation on the ILP32 ABI for ARM64

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Message-ID: <564C321F.5050707@huawei.com>
Date:	Wed, 18 Nov 2015 16:09:03 +0800
From:	"Zhangjian (Bamvor)" <bamvor.zhangjian@...wei.com>
To:	Yury Norov <ynorov@...iumnetworks.com>, <arnd@...db.de>,
	<catalin.marinas@....com>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
CC:	<pinskia@...il.com>, <ddaney.cavm@...il.com>,
	<jan.dakinevich@...il.com>, <Prasun.Kapoor@...iumnetworks.com>,
	<christoph.muellner@...obroma-systems.com>,
	<philipp.tomsich@...obroma-systems.com>, <broonie@...nel.org>,
	<andrey.konovalov@...aro.org>, <Nathan_Lynch@...tor.com>,
	<agraf@...e.de>, <klimov.linux@...il.com>,
	<joseph@...esourcery.com>, <schwab@...e.de>,
	"bamvor.zhangjian@hua >> Bamvor Jian Zhang" 
	<bamvor.zhangjian@...wei.com>
Subject: Re: [PATCH v6 01/19] arm64:ilp32: add documentation on the ILP32
 ABI for ARM64

Hi, Yury

On 2015/11/18 5:16, Yury Norov wrote:
> From: Philipp Tomsich <philipp.tomsich@...obroma-systems.com>
> 
> Based on Andrew Pinski's original patch-series and adapted with changes
> to reduce the duplication of code-paths and resolve issue found during
> LTP testing.
> 
> Reviewed-by: David Daney <ddaney@...iumnetworks.com>
> 
> 
> Signed-off-by: Philipp Tomsich <philipp.tomsich@...obroma-systems.com>
> Signed-off-by: Christoph Muellner <christoph.muellner@...obroma-systems.com>
> Signed-off-by: Yury Norov <ynorov@...iumnetworks.com>
> Signed-off-by: Andrew Pinski <Andrew.Pinski@...iumnetworks.com>
> ---
>  Documentation/arm64/ilp32.txt | 47 +++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 47 insertions(+)
>  create mode 100644 Documentation/arm64/ilp32.txt
> 
> diff --git a/Documentation/arm64/ilp32.txt b/Documentation/arm64/ilp32.txt
> new file mode 100644
> index 0000000..93c09f2
> --- /dev/null
> +++ b/Documentation/arm64/ilp32.txt
> @@ -0,0 +1,47 @@
> +ILP32 AARCH64 SYSCALL ABI
> +=========================
> +Written by Andrew Pinski <apinski@...ium.com>
> +Updated by Philipp Tomsich <philipp.tomsich@...obroma-systems.com>
> +Updated by Yury Norov <ynorov@...iumnetworks.com>
> +
> +
> +This document describes the ILP32 syscall ABI and where it differs
> +from the generic linux syscall interface.
> +
> +Some structures are changed to reduce the difference in the code path
> +for both ILP32 and LP64 ABIs for signal handling.
Given that user may upgrade from aarch32 to ILP32. How about add abi
comparison between aarch32 and aarch64 ilp32?

Regards

Bamvor


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