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Re: Fwd: System Calls on Hurd

From: Samuel Thibault
Subject: Re: Fwd: System Calls on Hurd
Date: Sat, 18 Jan 2014 00:05:48 +0100
User-agent: Mutt/1.5.21+34 (58baf7c9f32f) (2010-12-30)

Please always keep the mailing list in Cc, so you optimize the chance of getting
a complete answer in a minimized time.  Otherwise, you run the risk of either
get a terse answer, or have to wait (possibly long) that I have time to provide
a lengthier answer (or simply that I come back from vacations...)

Subhashish Pradhan, le Sat 18 Jan 2014 03:27:10 +0530, a écrit :
> So I was reading about system calls this week and I noticed that generally we
> write wrappers which handle the syscalls from programs. So if a system call is
> encountered, it calls this wrapper which then makes calls to the kernel to
> perform the task.
> So I presume that this wrapper is glibc in Hurd, right?


> If so, then is it a vanilla glibc or a modified one.

It's in the plain vanilla glibc.

> If the above presumptions are true then how are these glibc wrappers related 
> to
> mach_msg syscalls in let's say: /include/mach/syscall_sw.h ?

See the eglibc build log on http://buildd.debian.org/eglibc :
mach/syscall_*.S are generated and built.


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