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From: Szabolcs Nagy <nsz-4P1ElwuDYu6sTnJN9+BGXg@public.gmane.org>
To: Dmitry Vyukov <dvyukov-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
Cc: syzkaller <syzkaller-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>,
	linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	Michael Kerrisk-manpages
	<mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
	Sasha Levin
	<levinsasha928-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Mathieu Desnoyers
	<mathieu.desnoyers-vg+e7yoeK/dWk0Htik3J/w@public.gmane.org>,
	scientist-b10kYP2dOMg@public.gmane.org,
	Steven Rostedt <rostedt-nx8X9YLhiw1AfugRpC6u6w@public.gmane.org>,
	Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
	carlos-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	Kostya Serebryany <kcc-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
	Mike Frysinger <vapier-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
	Dave Jones
	<davej-rdkfGonbjUTCLXcRTR1eJlpr/1R2p/CL@public.gmane.org>,
	Tavis Ormandy <taviso-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
Subject: Re: Formal description of system call interface
Date: Tue, 22 Nov 2016 14:07:38 +0100	[thread overview]
Message-ID: <20161122130738.GT5749@port70.net> (raw)
In-Reply-To: <CACT4Y+bq97OPqW9nUoQWDdVfeCv6oOYT0=GeFmOu2rosBz4s2Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>

* Dmitry Vyukov <dvyukov-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org> [2016-11-21 16:03:04 +0100]:
> On Mon, Nov 7, 2016 at 1:28 AM, Szabolcs Nagy <nsz-4P1ElwuDYu6sTnJN9+BGXg@public.gmane.org> wrote:
> > * Dmitry Vyukov <dvyukov-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org> [2016-11-06 14:39:28 -0800]:
> >> For the reference, current syzkaller descriptions are in txt files here:
> >> https://github.com/google/syzkaller/tree/master/sys
> > ...
> >> Taking the opportunity, if you see that something is missing/wrong
> >> in the descriptions of the subsystem you care about, or if it is not
> >> described at all, fixes are welcome.
> >
> > abi variants are missing (abi variation makes a lot of
> > syscall interface related work painful).
> 
> 
> What exactly do you mean by "abi variants"? Is it architecture?
> What exactly needs to be added to the descriptions support "abi variants?
> 

abi variant is a supported syscall abi
(linux supports several abis on the same arch:
e.g. x86 has i386,x86_64,x32 one might also
call different endianness a different abi, but
i'd expect le/be to be handled together.)

available syscalls, argument types and ordering
can be different across abis

i may be wrong, but i did not see those handled
in sys.txt, looking at it now i see missing
paddings in ipc structs (*_ds) so it may not
work the way i assumed (these are types which
have some abi variation).

  parent reply	other threads:[~2016-11-22 13:07 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-06 22:39 Formal description of system call interface Dmitry Vyukov
     [not found] ` <CACT4Y+YYgs43nJnyg3B9cHWOue62iMW3ZgXQKiKG12A1NVMgtg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-11-07  0:28   ` Szabolcs Nagy
2016-11-21 15:03     ` Dmitry Vyukov
     [not found]       ` <CACT4Y+bq97OPqW9nUoQWDdVfeCv6oOYT0=GeFmOu2rosBz4s2Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-11-22 13:07         ` Szabolcs Nagy [this message]
2016-11-07 10:38   ` Cyril Hrubis
     [not found]     ` <20161107103819.GA11374-2UyX9mZUyMU@public.gmane.org>
2016-11-21 15:14       ` Dmitry Vyukov
     [not found]         ` <CACT4Y+aUzdX8NqMu+Y3s53vEmoBw7KysB3g2PEjZ6MyJimki1Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-11-21 15:34           ` Tavis Ormandy
2016-11-21 16:10           ` Cyril Hrubis
2016-11-21 15:37     ` Steven Rostedt
     [not found]       ` <20161121103752.70ad1418-f9ZlEuEWxVcJvu8Pb33WZ0EMvNT87kid@public.gmane.org>
2016-11-21 15:48         ` Dmitry Vyukov
2016-11-21 16:58           ` Cyril Hrubis
2017-04-21 15:14   ` Carlos O'Donell
2016-11-11 17:10 ` Andy Lutomirski
2016-11-21 15:17   ` Dmitry Vyukov

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