From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Dave Martin <Dave.Martin@arm.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
linux-man@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/2] syscall.2: arm: Use real register names for arm/OABI
Date: Tue, 5 May 2020 16:26:58 +0100 [thread overview]
Message-ID: <20200505152658.GL1551@shell.armlinux.org.uk> (raw)
In-Reply-To: <1588692280-15878-2-git-send-email-Dave.Martin@arm.com>
On Tue, May 05, 2020 at 04:24:39PM +0100, Dave Martin wrote:
> The arm OABI syscall interface is currently documented in terms of
> register name aliases defined by the ARM Procedure Call Standard
> (APCS). However, these don't make sense in the context of a binary
> interface that doesn't comply (or need to comply) with APCS.
>
> Use the real architectural register names instead.
>
> The names a1-a4, v1... are just aliases for r0-r3, r4... anyway, so
> the interface is just the same regardless of which set of names is
> used.
>
> Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Thanks Dave,
Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
> ---
> man2/syscall.2 | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/man2/syscall.2 b/man2/syscall.2
> index f2b277b..53ab40e 100644
> --- a/man2/syscall.2
> +++ b/man2/syscall.2
> @@ -201,7 +201,7 @@ Arch/ABI Instruction System Ret Ret Error Notes
> _
> alpha callsys v0 v0 a4 a3 1, 6
> arc trap0 r8 r0 - -
> -arm/OABI swi NR - a1 - - 2
> +arm/OABI swi NR - r0 - - 2
> arm/EABI swi 0x0 r7 r0 r1 -
> arm64 svc #0 x8 x0 x1 -
> blackfin excpt 0x0 P0 R0 - -
> @@ -332,7 +332,7 @@ Arch/ABI arg1 arg2 arg3 arg4 arg5 arg6 arg7 Notes
> _
> alpha a0 a1 a2 a3 a4 a5 -
> arc r0 r1 r2 r3 r4 r5 -
> -arm/OABI a1 a2 a3 a4 v1 v2 v3
> +arm/OABI r0 r1 r2 r3 r4 r5 r6
> arm/EABI r0 r1 r2 r3 r4 r5 r6
> arm64 x0 x1 x2 x3 x4 x5 -
> blackfin R0 R1 R2 R3 R4 R5 -
> --
> 2.1.4
>
>
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 10.2Mbps down 587kbps up
next prev parent reply other threads:[~2020-05-05 15:27 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-05 15:24 [PATCH 0/2] syscall.2: Minor register name fixes for arm/arm64 Dave Martin
2020-05-05 15:24 ` [PATCH 1/2] syscall.2: arm: Use real register names for arm/OABI Dave Martin
2020-05-05 15:26 ` Russell King - ARM Linux admin [this message]
2020-05-05 15:53 ` Dave Martin
2020-05-06 10:05 ` Michael Kerrisk (man-pages)
2020-05-06 10:34 ` Dave Martin
2020-05-05 15:24 ` [PATCH 2/2] syscall.2: arm64: Fix syscall number register size Dave Martin
2020-05-05 15:54 ` Will Deacon
2020-05-05 16:06 ` Dave Martin
2020-05-06 10:16 ` Michael Kerrisk (man-pages)
2020-05-06 10:35 ` Dave Martin
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