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System Calls on Hurd

From: Subhashish Pradhan
Subject: System Calls on Hurd
Date: Sat, 18 Jan 2014 03:25:57 +0530

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.

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 ?

Else, please explain where I'm wrong.


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