From: Joakim Tjernlund <Joakim.Tjernlund@infinera.com>
To: "ldv@altlinux.org" <ldv@altlinux.org>,
"mpe@ellerman.id.au" <mpe@ellerman.id.au>,
"npiggin@gmail.com" <npiggin@gmail.com>
Cc: "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
"libc-dev@lists.llvm.org" <libc-dev@lists.llvm.org>,
"musl@lists.openwall.com" <musl@lists.openwall.com>,
"linux-api@vger.kernel.org" <linux-api@vger.kernel.org>
Subject: Re: Linux powerpc new system call instruction and ABI
Date: Wed, 19 May 2021 07:33:43 +0000 [thread overview]
Message-ID: <9b5ea7059c5a5d4e9ccccd7d73ce2c66b2203f52.camel@infinera.com> (raw)
In-Reply-To: <20210518231331.GA8464@altlinux.org>
On Wed, 2021-05-19 at 02:13 +0300, Dmitry V. Levin wrote:
> Hi,
>
> On Thu, Jun 11, 2020 at 06:12:01PM +1000, Nicholas Piggin wrote:
> [...]
> > - Error handling: The consensus among kernel, glibc, and musl is to move to
> > using negative return values in r3 rather than CR0[SO]=1 to indicate error,
> > which matches most other architectures, and is closer to a function call.
What about syscalls like times(2) which can return -1 without it being an error?
Jocke
WARNING: multiple messages have this Message-ID (diff)
From: Joakim Tjernlund <Joakim.Tjernlund@infinera.com>
To: "ldv@altlinux.org" <ldv@altlinux.org>,
"mpe@ellerman.id.au" <mpe@ellerman.id.au>,
"npiggin@gmail.com" <npiggin@gmail.com>
Cc: "libc-dev@lists.llvm.org" <libc-dev@lists.llvm.org>,
"linux-api@vger.kernel.org" <linux-api@vger.kernel.org>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
"musl@lists.openwall.com" <musl@lists.openwall.com>
Subject: Re: Linux powerpc new system call instruction and ABI
Date: Wed, 19 May 2021 07:33:43 +0000 [thread overview]
Message-ID: <9b5ea7059c5a5d4e9ccccd7d73ce2c66b2203f52.camel@infinera.com> (raw)
In-Reply-To: <20210518231331.GA8464@altlinux.org>
On Wed, 2021-05-19 at 02:13 +0300, Dmitry V. Levin wrote:
> Hi,
>
> On Thu, Jun 11, 2020 at 06:12:01PM +1000, Nicholas Piggin wrote:
> [...]
> > - Error handling: The consensus among kernel, glibc, and musl is to move to
> > using negative return values in r3 rather than CR0[SO]=1 to indicate error,
> > which matches most other architectures, and is closer to a function call.
What about syscalls like times(2) which can return -1 without it being an error?
Jocke
next prev parent reply other threads:[~2021-05-19 7:33 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-11 8:12 Linux powerpc new system call instruction and ABI Nicholas Piggin
2020-06-11 8:12 ` Nicholas Piggin
2020-06-11 8:12 ` [PATCH 1/2] powerpc/64s/exception: treat NIA below __end_interrupts as soft-masked Nicholas Piggin
2020-06-11 8:12 ` Nicholas Piggin
2020-07-24 13:25 ` Michael Ellerman
2020-07-24 13:25 ` Michael Ellerman
2020-06-11 8:12 ` [PATCH 2/2] powerpc/64s: system call support for scv/rfscv instructions Nicholas Piggin
2020-06-11 8:12 ` Nicholas Piggin
2020-07-23 6:47 ` Michael Ellerman
2020-07-23 16:48 ` Christophe Leroy
2020-07-23 16:48 ` Christophe Leroy
2020-07-24 10:45 ` Michael Ellerman
2020-07-24 10:45 ` Michael Ellerman
2020-06-11 21:02 ` Linux powerpc new system call instruction and ABI Segher Boessenkool
2020-06-11 21:02 ` Segher Boessenkool
2020-06-14 9:26 ` Nicholas Piggin
2020-06-14 9:26 ` Nicholas Piggin
2021-05-18 23:13 ` Dmitry V. Levin
2021-05-18 23:13 ` Dmitry V. Levin
2021-05-19 2:50 ` Nicholas Piggin
2021-05-19 2:50 ` Nicholas Piggin
2021-05-19 5:01 ` Nicholas Piggin
2021-05-19 5:01 ` Nicholas Piggin
2021-05-21 19:40 ` Matheus Castanho
2021-05-21 19:40 ` Matheus Castanho
2021-05-21 19:52 ` Florian Weimer
2021-05-21 19:52 ` Florian Weimer
2021-05-21 20:00 ` Matheus Castanho
2021-05-21 20:00 ` Matheus Castanho
2021-05-21 20:52 ` Dmitry V. Levin
2021-05-21 20:52 ` Dmitry V. Levin
2021-05-24 12:11 ` Matheus Castanho
2021-05-24 12:11 ` Matheus Castanho
2021-05-24 20:33 ` Matheus Castanho
2021-05-24 20:33 ` Matheus Castanho
2021-05-19 10:24 ` Dmitry V. Levin
2021-05-19 10:24 ` Dmitry V. Levin
2021-05-19 10:59 ` Nicholas Piggin
2021-05-19 10:59 ` Nicholas Piggin
2021-05-19 12:39 ` Tulio Magno Quites Machado Filho
2021-05-19 12:39 ` Tulio Magno Quites Machado Filho
2021-05-19 13:26 ` Dmitry V. Levin
2021-05-19 13:26 ` Dmitry V. Levin
2021-05-19 22:51 ` Nicholas Piggin
2021-05-19 22:51 ` Nicholas Piggin
2021-05-19 23:27 ` Dmitry V. Levin
2021-05-19 23:27 ` Dmitry V. Levin
2021-05-20 2:40 ` Nicholas Piggin
2021-05-20 2:40 ` Nicholas Piggin
2021-05-20 3:06 ` Dmitry V. Levin
2021-05-20 3:06 ` Dmitry V. Levin
2021-05-20 5:12 ` Nicholas Piggin
2021-05-20 5:12 ` Nicholas Piggin
2021-05-19 7:33 ` Joakim Tjernlund [this message]
2021-05-19 7:33 ` Joakim Tjernlund
2021-05-19 7:55 ` Nicholas Piggin
2021-05-19 7:55 ` Nicholas Piggin
2021-05-19 8:08 ` Joakim Tjernlund
2021-05-19 8:08 ` Joakim Tjernlund
2021-05-19 8:42 ` Nicholas Piggin
2021-05-19 8:42 ` Nicholas Piggin
2021-05-19 11:12 ` Nicholas Piggin
2021-05-19 11:12 ` Nicholas Piggin
2021-05-19 14:38 ` Segher Boessenkool
2021-05-19 14:38 ` Segher Boessenkool
2021-05-19 15:06 ` Joakim Tjernlund
2021-05-19 15:06 ` Joakim Tjernlund
2021-05-19 15:22 ` Segher Boessenkool
2021-05-19 15:22 ` Segher Boessenkool
2021-05-19 15:36 ` [musl] " Rich Felker
2021-05-19 15:36 ` Rich Felker
2021-05-19 18:09 ` Joakim Tjernlund
2021-05-19 18:09 ` Joakim Tjernlund
2021-05-19 23:48 ` [musl] " Rich Felker
2021-05-19 23:48 ` Rich Felker
2021-05-20 1:06 ` Dmitry V. Levin
2021-05-20 1:06 ` Dmitry V. Levin
2021-05-20 2:45 ` Nicholas Piggin
2021-05-20 2:45 ` Nicholas Piggin
2021-05-20 2:59 ` Dmitry V. Levin
2021-05-20 2:59 ` Dmitry V. Levin
2021-05-20 7:20 ` Nicholas Piggin
2021-05-20 7:20 ` Nicholas Piggin
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