linux-kernel - Re: interpreting semantics of ipc system call

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <AANLkTimHsih_s+ETtq7YHSj7zvAx-DjipOHXvZfWOdXR@mail.gmail.com>
Date:	Thu, 30 Sep 2010 16:29:06 -0700
From:	Andreas Saebjoernsen <andreas@...italplaywright.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Américo Wang <xiyou.wangcong@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: interpreting semantics of ipc system call

Thank you! I am now implementing support for this system call. Looking at the
data structures that the 'void*' can represent it will probably take a
some time,
but the semantics is clear.

kind regards,
Andreas

On Thu, Sep 30, 2010 at 4:37 AM, Arnd Bergmann <arnd@...db.de> wrote:
> On Thursday 30 September 2010, Américo Wang wrote:
>> On Wed, Sep 29, 2010 at 03:03:11PM -0700, Andreas Saebjoernsen wrote:
>> >We are developing a simulator that can simulate any specimen x86 linux program.
>> >Our simulator has a simulated memory, unlike the concrete memory state of
>> >tools like Valgrind, so that we can do concrete symbolic execution. Instead of
>> >reimplementing the system calls we marshal the system calls called by
>> >the specimen.
>> >
>> >I am currently working on marshaling calls to the ipc system call (system
>> >call 117) which has the following signature
>> >
>> >int ipc(unsigned int call, int first, int second, int third, void
>> >*ptr, long fifth)
>> >
>> >I have a problem interpreting what the size is of the data structure
>> >pointed to by
>> >the 'void*', and I have been unable to locate good documentation or code on the
>> >semantics of this system call.
>>
>>
>> Take a look at ipc/syscall.c, that pointer will be interpreted to different
>> data structures when you pass different arguments to 'call'.
>
> Right. Note that you can ignore the version field for all practical
> purposes and consider it constant.
>
>        Arnd
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/