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From: Szabolcs Nagy <nsz@port70.net>
Newsgroups: gmane.linux.lib.musl.general
Subject: Re: Re: Need to zero pads in msghdr
Date: Thu, 26 Jan 2017 00:00:46 +0100
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* 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.