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Re: [Qemu-devel] question about syscall


From: Lionel Landwerlin
Subject: Re: [Qemu-devel] question about syscall
Date: Sat, 07 Feb 2009 14:27:43 +0100

Le samedi 07 février 2009 à 14:15 +0100, Antonio Ricci a écrit :
> Hi all, 
> 
> 
> i'd want to understand how Qemu handles system calls while executing
> both Linux and Windows operating system.

A syscall is usually done by generating a cpu exception. In Qemu, when a
such exception is catched by a virtual cpu, Qemu executes the related
syscall (syscall number is usually put in a register). All of this
depends on the ABI.


-- 
Lione Landwerlin                                         

O p e n W i d e                    14, rue Gaillon 75002 Paris





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