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From: Heli <helicoterus-elih@yahoo.it>
To: Avi Kivity <avi@redhat.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] How does a system call work on QEMU?
Date: Sun, 17 May 2009 10:46:13 +0200	[thread overview]
Message-ID: <4A0FCED5.6070005@yahoo.it> (raw)
In-Reply-To: <4A0C5985.6020206@redhat.com>

Avi Kivity ha scritto:
> grisu46 wrote:
>>> No.  Look at target-i386/translate.c, case 0x105 for syscall 
>>> emulation.  Eventually it ends up calling helper_syscall().
>>>
>>
>> Simplify?
>> I am a newbie.
> 
> Sorry, you're on your own.  I can give you pointers but it's up to you 
> to follow them.  If you're serious about understanding qemu you should 
> be prepared a lot of time reading the source code and processor 
> documentation.
> 
So it this the architecture of qemu, emulator version?
QEMU is a process that gives to o.s.guest a virtual hw
layer.
Every guest will be run by a QEMU instance.

See picture schema I prepaired: http://yfrog.com/7gqemulayersj

So system calls go from a guest application to its
operating system that communicates with its virtual
hardware. QEMU receives a system call and software emulator
QEMU performs a system call in O.S. host.
It is right?

Thanks
Chiacchiera con i tuoi amici in tempo reale! 
 http://it.yahoo.com/mail_it/foot/*http://it.messenger.yahoo.com 

  parent reply	other threads:[~2009-05-17  8:46 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-05-14  6:50 [Qemu-devel] How does a system call work on QEMU? helicoterus-elih
2009-05-14 10:19 ` Paul Brook
2009-05-14 13:10   ` Heli
2009-05-14 16:40     ` Avi Kivity
2009-05-14 17:11       ` grisu46
2009-05-14 17:48         ` Avi Kivity
2009-05-14 18:00           ` grisu46
2009-05-15  4:49             ` Glauber Costa
2009-05-17  8:46           ` Heli [this message]
2009-05-17  9:31             ` Avi Kivity
2009-05-17 14:41             ` Fernando Carrijo
2009-05-14 14:57 ` Mulyadi Santosa
  -- strict thread matches above, loose matches on Subject: below --
2009-05-15  8:54 helicoterus-elih
2009-05-13 18:41 helicoterus-elih
2009-05-14  4:38 ` Mulyadi Santosa

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