hvmloader problems？

hvmloader problems？

[henanwxr]

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Hi all, I have some puzzle about hvmloader in the path /tools/firmware/, they are:
1: Is hvmloader running in non-root mode?
2: If hvmloader runs in non-root mode, does it have its pagetable? when set GUEST_CR3 in vmcs?
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.

Much Thanks!
 
- henanwxr

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Re: hvmloader problems？

[Keir Fraser]

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.
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel

hvmloader problems?

[henanwxr]

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Hi all, I have some puzzle about hvmloader in the path /tools/firmware/, they are:
1: Is hvmloader running in non-root mode?
2: If hvmloader runs in non-root mode, does it have its pagetable? when set GUEST_CR3 in vmcs?
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.

Much Thanks!
 - henanwxr

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