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From: Joseph Myers <joseph@codesourcery.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: <carlos@redhat.com>, Szabolcs Nagy <Szabolcs.Nagy@arm.com>,
	Dave Martin <Dave.Martin@arm.com>, <dancol@google.com>,
	<nd@arm.com>, Florian Weimer <fweimer@redhat.com>,
	Michael Kerrisk <mtk.manpages@gmail.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Joel Fernandes <joelaf@google.com>,
	Linux API <linux-api@vger.kernel.org>, Willy Tarreau <w@1wt.eu>,
	Vlastimil Babka <vbabka@suse.cz>,
	GNU C Library <libc-alpha@sourceware.org>,
	Firoz Khan <firoz.khan@linaro.org>
Subject: Re: Official Linux system wrapper library?
Date: Wed, 14 Nov 2018 18:30:27 +0000	[thread overview]
Message-ID: <alpine.DEB.2.21.1811141825210.16571@digraph.polyomino.org.uk> (raw)
In-Reply-To: <CAK8P3a1S65QSRruig+hg_03XbcNges1oR0YWivypvcp7r79Lew@mail.gmail.com>

On Wed, 14 Nov 2018, Arnd Bergmann wrote:

> Firoz Khan is in the process of doing part of this, by changing the
> in-kernel per-architecture unistd.h and syscall.S files into a
> architecture independent machine-readable format that is used to
> generate the existing files. The format will be similar to what
> we have on arm/s390/x86 in the syscall.tbl files already.

Will this also mean the following are unable to occur in future (both have 
occurred in the past):

* A syscall added to unistd.h for an architecture, but not added to the 
syscall table until sometime later?

* A syscall added to the native syscall table for some ABI (e.g. 32-bit 
x86 or arm) but not added to the corresponding compat syscall table (e.g. 
32-bit x86 binaries running on x86_64, 32-bit arm binaries running on 
arm64) until sometime later?

Avoiding both of those complications is beneficial to libc (as is a third 
thing, avoiding a syscall being added to different architectures in 
different versions).

-- 
Joseph S. Myers
joseph@codesourcery.com

  reply	other threads:[~2018-11-14 18:30 UTC|newest]

Thread overview: 85+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-10 18:52 Official Linux system wrapper library? Daniel Colascione
2018-11-10 19:01 ` Willy Tarreau
2018-11-10 19:06   ` Daniel Colascione
2018-11-10 19:33     ` Willy Tarreau
2018-11-10 19:20 ` Greg KH
2018-11-10 19:58   ` Vlastimil Babka
2018-11-12  2:03     ` Carlos O'Donell
2018-11-12  2:24   ` Carlos O'Donell
2018-11-12  2:36     ` Greg KH
2018-11-12 16:08       ` Jonathan Corbet
2018-11-12 20:03         ` Greg KH
2018-12-09  4:38         ` Randy Dunlap
2018-12-10 16:27           ` Jonathan Corbet
2018-12-10 17:39             ` Carlos O'Donell
2018-12-10 23:32               ` Randy Dunlap
2018-11-12  5:46     ` Andy Lutomirski
2018-11-11  6:55 ` Michael Kerrisk (man-pages)
2018-11-11  8:17   ` Willy Tarreau
2018-11-11  8:25     ` Daniel Colascione
2018-11-11 10:40       ` Florian Weimer
2018-11-11 10:30     ` Florian Weimer
2018-11-11 11:02       ` Willy Tarreau
2018-11-11 12:07         ` Florian Weimer
2018-11-11 10:53     ` Michael Kerrisk (man-pages)
2018-11-11 11:02       ` Florian Weimer
2018-11-12 16:43         ` Joseph Myers
2018-11-13 15:15           ` Carlos O'Donell
2018-11-11 11:11       ` Willy Tarreau
2018-11-11 11:46         ` Florian Weimer
2018-11-11 12:09           ` Willy Tarreau
2018-11-12 12:25             ` Florian Weimer
2018-11-12 17:36             ` Joseph Myers
2018-11-12 17:53               ` Greg KH
2018-11-12 18:09                 ` Joseph Myers
2018-11-12 18:14                   ` Randy Dunlap
2018-11-12 16:59           ` Joseph Myers
2018-11-14 12:03           ` Adam Borowski
2018-11-14 12:10             ` Florian Weimer
2018-11-16 21:24         ` Alan Cox
2018-11-11 11:09   ` Florian Weimer
2018-11-11 14:22     ` Daniel Colascione
2018-11-12  1:44       ` Paul Eggert
2018-11-12  8:11       ` Florian Weimer
2018-11-12 13:19         ` Daniel Colascione
2018-11-12 17:24           ` Zack Weinberg
2018-11-12 18:28             ` Daniel Colascione
2018-11-12 19:11               ` Florian Weimer
2018-11-12 19:26                 ` Daniel Colascione
2018-11-12 22:51                   ` Joseph Myers
2018-11-12 23:10                     ` Daniel Colascione
2018-11-12 23:26                       ` Joseph Myers
2018-11-12 22:34                 ` Joseph Myers
2018-11-13 19:39           ` Dave Martin
2018-11-13 20:58             ` Andy Lutomirski
2018-11-14 10:54               ` Dave Martin
2018-11-14 11:40                 ` Florian Weimer
2018-11-15 10:33                   ` Dave Martin
2018-11-14 11:58             ` Szabolcs Nagy
2018-11-14 14:46               ` Andy Lutomirski
2018-11-14 15:07                 ` Florian Weimer
2018-11-14 17:40                 ` Joseph Myers
2018-11-14 18:13                   ` Paul Eggert
2018-11-14 14:58               ` Carlos O'Donell
2018-11-14 17:15                 ` Arnd Bergmann
2018-11-14 18:30                   ` Joseph Myers [this message]
2018-11-14 15:40               ` Daniel Colascione
2018-11-14 18:15                 ` Joseph Myers
2018-11-14 18:35                   ` Daniel Colascione
2018-11-14 18:47                     ` Joseph Myers
2018-11-15  5:30                       ` Theodore Y. Ts'o
2018-11-15 16:29                         ` Joseph Myers
2018-11-15 17:08                           ` Theodore Y. Ts'o
2018-11-15 17:14                             ` Joseph Myers
2018-11-15 21:00                             ` Carlos O'Donell
2018-11-15 20:34                       ` Carlos O'Donell
2018-11-23 13:34           ` Florian Weimer
2018-11-23 14:11             ` David Newall
2018-11-23 15:23               ` Szabolcs Nagy
2018-11-24  3:41                 ` David Newall
2018-11-28 13:18               ` David Laight
2018-11-23 20:15             ` Daniel Colascione
2018-11-23 23:19               ` Dmitry V. Levin
2018-11-12 12:45       ` Szabolcs Nagy
2018-11-12 14:35         ` Theodore Y. Ts'o
2018-11-12 14:40           ` Daniel Colascione

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