From 38368072b37bf73dda26dac536e4aa6cf13c67e4 Mon Sep 17 00:00:00 2001 From: Thomas Schwinge Date: Mon, 29 Nov 2010 13:41:16 +0100 Subject: system_call: New. --- system_call.mdwn | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 system_call.mdwn (limited to 'system_call.mdwn') diff --git a/system_call.mdwn b/system_call.mdwn new file mode 100644 index 00000000..197889cb --- /dev/null +++ b/system_call.mdwn @@ -0,0 +1,19 @@ +[[!meta copyright="Copyright © 2010 Free Software Foundation, Inc."]] + +[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable +id="license" text="Permission is granted to copy, distribute and/or modify this +document under the terms of the GNU Free Documentation License, Version 1.2 or +any later version published by the Free Software Foundation; with no Invariant +Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license +is included in the section entitled [[GNU Free Documentation +License|/fdl]]."]]"""]] + +In an [[UNIX]]-like system, a *system call* (*syscall*) is used to request all +kinds of functionality from the operating system kernel. + +A [[microkernel]]-based system typically won't offer a lot of system calls -- +apart from one central one, and that is *send message* -- but instead [[RPC]]s +will be used instead. + +In the [[GNU Hurd|hurd]], a lot of what is traditionlly considered to be a UNIX +system call is implemented (primarily by means of [[RPC]]) inside [[glibc]]. -- cgit v1.2.3