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([2001:a61:2482:101:a081:4793:30bf:f3d5]) by smtp.gmail.com with ESMTPSA id c25sm2195384wmb.44.2020.05.06.03.05.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 06 May 2020 03:05:02 -0700 (PDT) Cc: mtk.manpages@gmail.com, Russell King , Catalin Marinas , Will Deacon , 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 To: Dave Martin References: <1588692280-15878-1-git-send-email-Dave.Martin@arm.com> <1588692280-15878-2-git-send-email-Dave.Martin@arm.com> From: "Michael Kerrisk (man-pages)" Message-ID: <9c75b89f-be1e-52a7-e98c-46b7dfe89d1d@gmail.com> Date: Wed, 6 May 2020 12:05:00 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <1588692280-15878-2-git-send-email-Dave.Martin@arm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-man-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org On 5/5/20 5:24 PM, 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 Thanks, Dave. Patch applied, with Russell's Acked-by added. Cheers, Michael > --- > 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 - > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/