From: Szabolcs Nagy <nsz@port70.net>
To: musl@lists.openwall.com
Cc: Andrei Vagin <avagin@gmail.com>
Subject: Re: Re: Need to zero pads in msghdr
Date: Thu, 26 Jan 2017 00:00:46 +0100 [thread overview]
Message-ID: <20170125230042.GR17692@port70.net> (raw)
In-Reply-To: <CANaxB-wG0-e7yOcfB2tOHewU3FcesrdsnthJo6Lrfc3hYhTSvg@mail.gmail.com>
* Andrei Vagin <avagin@gmail.com> [2017-01-25 11:46:44 -0800]:
> On Wed, Jan 25, 2017 at 11:40 AM, Szabolcs Nagy <nsz@port70.net> wrote:
> > why do you need a raw syscall?
>
> We inject our code into processes which are going to be dumped:
> https://criu.org/Parasite_code
>
> And on restore we have to unmap old libc to restore process mappings.
if you static link to musl for the parasite then
i don't see why the syscalls have to be raw..
what you may worry about is process global
state that the libc takes control of
(libc internal signal handler, brk pointer,
doing things to fd 0/1/2, etc), but that you
cannot prevent with raw syscalls.
next prev parent reply other threads:[~2017-01-25 23:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-25 16:42 Andrei Vagin
2017-01-25 17:00 ` Rich Felker
2017-01-25 18:56 ` Andrei Vagin
2017-01-25 19:40 ` Szabolcs Nagy
2017-01-25 19:46 ` Andrei Vagin
2017-01-25 19:59 ` Rich Felker
2017-01-25 23:00 ` Szabolcs Nagy [this message]
2017-01-26 15:01 ` Rich Felker
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