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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