From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1HOj90-0004Pv-V3 for user-mode-linux-devel@lists.sourceforge.net; Tue, 06 Mar 2007 15:32:35 -0800 Received: from wr-out-0506.google.com ([64.233.184.224]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1HOj90-00027y-Js for user-mode-linux-devel@lists.sourceforge.net; Tue, 06 Mar 2007 15:32:34 -0800 Received: by wr-out-0506.google.com with SMTP id 68so2585828wri for ; Tue, 06 Mar 2007 15:32:33 -0800 (PST) Message-ID: <3aab51dc0703061532g4b5e763co8927b5abeabcc2d@mail.gmail.com> Date: Tue, 6 Mar 2007 16:32:32 -0700 From: "Haifeng He" MIME-Version: 1.0 Subject: [uml-devel] Question about system call trap in UML List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============1272095049==" Sender: user-mode-linux-devel-bounces@lists.sourceforge.net Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net To: user-mode-linux-devel@lists.sourceforge.net --===============1272095049== Content-Type: multipart/alternative; boundary="----=_Part_173165_19643609.1173223952991" ------=_Part_173165_19643609.1173223952991 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Hi, I am beginner of UML. I have a question about how the system call trap happens in UML in skas0 mode. Suppose a user application within UML initialed a system call. How does UML track the system call and is the host OS the one to actually handle the system call? Particularly, I found a file: arch/um/sys-i386/stub.S. Is the file used for handling syscalls in user application? Can somebody explain the process to me? Thank you Haifeng ------=_Part_173165_19643609.1173223952991 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline
Hi,
 
I am beginner of UML. I have a question about how the system call
trap happens in UML in skas0 mode. Suppose a user application
within UML initialed a system call. How does UML track the
system call and is the host OS the one to actually handle the system
call?
 
Particularly, I found a file: arch/um/sys-i386/stub.S. Is the file used
for handling syscalls in user application? Can somebody explain the
process to me?
 
Thank you
 
Haifeng
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