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From: Dave Martin <Dave.Martin@arm.com>
To: Will Deacon <will@kernel.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>,
	Russell King <linux@armlinux.org.uk>,
	Catalin Marinas <catalin.marinas@arm.com>,
	linux-man@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 2/2] syscall.2: arm64: Fix syscall number register size
Date: Tue, 5 May 2020 17:06:52 +0100	[thread overview]
Message-ID: <20200505160652.GP30377@arm.com> (raw)
In-Reply-To: <20200505155457.GE24239@willie-the-truck>

On Tue, May 05, 2020 at 04:54:57PM +0100, Will Deacon wrote:
> On Tue, May 05, 2020 at 04:24:40PM +0100, Dave Martin wrote:
> > arm64 is currently documented as receiving the syscall number in
> > x8.
> > 
> > While this is the correct register, the syscall number is a 32-bit
> > integer.  Bits [63:32] are ignored by the kernel.
> > 
> > So it is more correct to say "w8".
> > 
> > Signed-off-by: Dave Martin <Dave.Martin@arm.com>
> > ---
> >  man2/syscall.2 | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/man2/syscall.2 b/man2/syscall.2
> > index 53ab40e..d724651 100644
> > --- a/man2/syscall.2
> > +++ b/man2/syscall.2
> > @@ -203,7 +203,7 @@ alpha	callsys	v0	v0	a4	a3	1, 6
> >  arc	trap0	r8	r0	-	-
> >  arm/OABI	swi NR	-	r0	-	-	2
> >  arm/EABI	swi 0x0	r7	r0	r1	-
> > -arm64	svc #0	x8	x0	x1	-
> > +arm64	svc #0	w8	x0	x1	-
> 
> Acked-by: Will Deacon <will@kernel.org>

Thanks!

---Dave

WARNING: multiple messages have this Message-ID (diff)
From: Dave Martin <Dave.Martin@arm.com>
To: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
	linux-man@vger.kernel.org,
	Michael Kerrisk <mtk.manpages@gmail.com>,
	linux-arm-kernel@lists.infradead.org,
	Russell King <linux@armlinux.org.uk>
Subject: Re: [PATCH 2/2] syscall.2: arm64: Fix syscall number register size
Date: Tue, 5 May 2020 17:06:52 +0100	[thread overview]
Message-ID: <20200505160652.GP30377@arm.com> (raw)
In-Reply-To: <20200505155457.GE24239@willie-the-truck>

On Tue, May 05, 2020 at 04:54:57PM +0100, Will Deacon wrote:
> On Tue, May 05, 2020 at 04:24:40PM +0100, Dave Martin wrote:
> > arm64 is currently documented as receiving the syscall number in
> > x8.
> > 
> > While this is the correct register, the syscall number is a 32-bit
> > integer.  Bits [63:32] are ignored by the kernel.
> > 
> > So it is more correct to say "w8".
> > 
> > Signed-off-by: Dave Martin <Dave.Martin@arm.com>
> > ---
> >  man2/syscall.2 | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/man2/syscall.2 b/man2/syscall.2
> > index 53ab40e..d724651 100644
> > --- a/man2/syscall.2
> > +++ b/man2/syscall.2
> > @@ -203,7 +203,7 @@ alpha	callsys	v0	v0	a4	a3	1, 6
> >  arc	trap0	r8	r0	-	-
> >  arm/OABI	swi NR	-	r0	-	-	2
> >  arm/EABI	swi 0x0	r7	r0	r1	-
> > -arm64	svc #0	x8	x0	x1	-
> > +arm64	svc #0	w8	x0	x1	-
> 
> Acked-by: Will Deacon <will@kernel.org>

Thanks!

---Dave

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  reply	other threads:[~2020-05-05 16:06 UTC|newest]

Thread overview: 22+ 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 ` 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 15:24   ` Dave Martin
2020-05-05 15:26   ` Russell King - ARM Linux admin
2020-05-05 15:26     ` Russell King - ARM Linux admin
2020-05-05 15:53     ` Dave Martin
2020-05-05 15:53       ` Dave Martin
2020-05-06 10:05   ` Michael Kerrisk (man-pages)
2020-05-06 10:05     ` Michael Kerrisk (man-pages)
2020-05-06 10:34     ` Dave Martin
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 15:24   ` Dave Martin
2020-05-05 15:54   ` Will Deacon
2020-05-05 15:54     ` Will Deacon
2020-05-05 16:06     ` Dave Martin [this message]
2020-05-05 16:06       ` Dave Martin
2020-05-06 10:16   ` Michael Kerrisk (man-pages)
2020-05-06 10:16     ` Michael Kerrisk (man-pages)
2020-05-06 10:35     ` Dave Martin
2020-05-06 10:35       ` Dave Martin

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