From: Keir Fraser <keir@xen.org>
To: henanwxr <henanwxr@163.com>, xen-devel@lists.xensource.com
Subject: Re: hvmloader problems？
Date: Thu, 19 May 2011 17:46:06 +0100 [thread overview]
Message-ID: <C9FB07DE.2D78E%keir@xen.org> (raw)
In-Reply-To: <70f3555b.11c52.1300919d56b.Coremail.henanwxr@163.com>
On 19/05/2011 17:32, "henanwxr" <henanwxr@163.com> wrote:
> Hi all, I have some puzzle about hvmloader in the path /tools/firmware/, they
> are:
> 1: Is hvmloader running in non-root mode?
Yes.
> 2: If hvmloader runs in non-root mode, does it have its pagetable? when set
> GUEST_CR3 in vmcs?
It runs in 32-bit protected mode, but with paging disabled. Hence it never
sets GUEST_CR3.
> 3: How can I find the value of GUEST_RIP in vmcs is set to the entry point of
> hvmloader,when virtual machine do it first vm entry.
It doesn't get changed from its initial value of zero. Execution starts at
0x0 and immediately executes a JMP to the actual start address. The JMP is
inserted by tools/libxc/xc_hvm_build.c (just search in there for JMP).
-- Keir
> Much Thanks!
>
> - henanwxr
>
>
>
> View this message in context: hvmloader problems？
> <http://xen.1045712.n5.nabble.com/hvmloader-problems-tp4410213p4410213.html>
> Sent from the Xen - Dev mailing list archive
> <http://xen.1045712.n5.nabble.com/Xen-Dev-f2473738.html> at Nabble.com.
>
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> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
next prev parent reply other threads:[~2011-05-19 16:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-19 16:32 hvmloader problems？ henanwxr
2011-05-19 16:46 ` Keir Fraser [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-05-19 15:51 hvmloader problems? henanwxr
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