Re: RE: Re: RE: where is the location of definitionof"do_xen_version"?

[房海峰 <fanghaifeng@ncic.ac.cn>]

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thank you very much for your replying!

and can you tell why xen do it in this way?

and what is the "__guest_handle_ " ?

thanks again.

2008-03-08 



房海峰 



发件人： Shan, Haitao 
发送时间： 2008-03-07  20:54:54 
收件人： fanghaifeng@ncic.ac.cn; xen-devel 
抄送： 
主题： RE: Re: RE: [Xen-devel] where is the location of definitionof"do_xen_version"? 
 
Xen/common/kernel.c
#define DO(fn) long do_##fn
 
DO(xen_version) )(int cmd, XEN_GUEST_HANDLE(void) arg)
 



From: xen-devel-bounces@lists.xensource.com [mailto:xen-devel-bounces@lists.xensource.com] On Behalf Of 房海峰
Sent: 2008年3月7日 18:50
To: xen-devel
Subject: Fw: Re: RE: [Xen-devel] where is the location of definitionof"do_xen_version"?
 
 
 
2008-03-07



房海峰



发件人： 房海峰
发送时间： 2008-03-07 18:49:08
收件人： Zheng, Shaohui
抄送： 
主题： Re: RE: [Xen-devel] where is the location of definition of"do_xen_version"?
 
thanks for you!
but the function you found is running in the user-space.
what i need is the function as a hypercall.
 
 
2008-03-07 



房海峰 



发件人： Zheng, Shaohui 
发送时间： 2008-03-07  17:46:52 
收件人： fanghaifeng@ncic.ac.cn; xen-devel 
抄送： 
主题： RE: [Xen-devel] where is the location of definition of"do_xen_version"? 
tools/libxc/xc_private.h
the start line  is 88.
88 static inline int do_xen_version(int xc_handle, int cmd, void *dest)
 89 {
 90     DECLARE_HYPERCALL;
 91
 92     hypercall.op     = __HYPERVISOR_xen_version;
 93     hypercall.arg[0] = (unsigned long) cmd;
 94     hypercall.arg[1] = (unsigned long) dest;
 95
 96     return do_xen_hypercall(xc_handle, &hypercall);
 97 }
Ctags can help you find the definition a function.
Just run the following commands.
cd xen-src-dir
ctags -R
vim -t do_xen_version
then you got it.
--
Best Regards
Shaohui
________________________________________
From: xen-devel-bounces@lists.xensource.com [mailto:xen-devel-bounces@lists.xensource.com] On Behalf Of 房海峰
Sent: 2008年3月7日 17:46
To: xen-devel
Subject: [Xen-devel] where is the location of definition of "do_xen_version"?
hi, my friends:
 
Currently, i am studying the way of hypercall's implementation.
i have already known the flow of hypercall's execuation, and i decided to add a new hypercall into the Xen.
first, i want to know the detail of one hypercall function, for example, "do_xen_version", but i can not find
the location of definition of "do_xen_version". who can help me?
 
i have get some resualts as follows:
 
[root@vt-0 xen-3.1.0-src]# find ./ -name "*.*" | xargs grep "do_xen_version"
./xen/include/xen/hypercall.h:do_xen_version(
Binary file ./xen/common/built_in.o matches
Binary file ./xen/common/kernel.o matches
./xen/arch/x86/x86_32/entry.S:        .long do_xen_version
./xen/arch/x86/x86_32/entry.S:        .byte 2 /* do_xen_version       */
Binary file ./xen/arch/x86/x86_32/built_in.o matches
Binary file ./xen/arch/x86/x86_32/entry.o matches
./xen/arch/x86/x86_64/entry.S:        .quad do_xen_version
./xen/arch/x86/x86_64/entry.S:        .byte 2 /* do_xen_version       */
Binary file ./xen/arch/x86/built_in.o matches
Binary file ./xen/arch/x86/hvm/hvm.o matches
Binary file ./xen/arch/x86/hvm/built_in.o matches
./xen/arch/ia64/linux-xen/entry.S:      data8 do_xen_version
./xen/arch/powerpc/powerpc64/hypercall_table.S:        .quad do_xen_version
Binary file ./dist/install/boot/xen-syms-3.1.0 matches
./tools/libxc/xc_private.c:    rc = do_xen_version(xc_handle, cmd, arg);
./tools/libxc/xc_private.h:static inline int do_xen_version(int xc_handle, int cmd, void *dest)
 
but the "do_xen_version" is not in those above.
 
thanks a lots.
 
www.ict.ac.cn
2008-03-07 
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房海峰 
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