RE: Re: Re: [Xen-devel] how to use printk() in xen?

["Li, Xin B" <xin.b.li@xxxxxxxxx>]

seems your question is a C language problem :-)

-Xin

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From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Haifeng Fang
Sent: 2008年4月27日 1:50
To: Hwandori
Cc: xen-devel
Subject: Re: Re: Re: [Xen-devel] how to use printk() in xen?

thanks for you.

 

now, by studying the printk.c of linux, i confirm that the two functions is the same.

 

 

2008-04-27

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Haifeng Fang

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发件人： Hwandori

发送时间： 2008-04-27  01:38:35

收件人： fhf25@xxxxxxx

抄送：

主题： Re: Re: [Xen-devel] how to use printk() in xen?

I'm sorry I'don't know exactly..
However, It seems that the declaration(include/xen/lib.h) and the definition(driver/char/console.c) is the same.

2008/4/26 Haifeng Fang <fhf25@xxxxxxx>:

thanks for a reply.

 

in my opinion, the "printk" is not what i want. the reason is:

 

firstly, in 'drivers/char/console.c' there is a definition of printk, but the file includes a header file - 'xen/lib.h'.

in 'xen/lib.h' there is a declaration of printk in form of "extern void printk()", so i doubt that the two functions is not the same one.

 

secondly, in 'xen/include/xen/console.h' there is not a declaration of printk, but why the decalaration of printk() is placed into the "xen/lib.h" file, meanwhile it is added a perfix 'extern' ?

 

so, can we talk about that? give me you advices please.

 

 

2008-04-26

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Haifeng Fang

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发件人： Hwandori

发送时间： 2008-04-26  21:05:46

收件人： fhf25@xxxxxxx

抄送：

主题： Re: [Xen-devel] how to use printk() in xen?

Hi,
I think 'printk' you meant is implemented in 'drivers/char/console.c'.
Is my answer what you want?

2008/4/26 Haifeng Fang <fhf25@xxxxxxx>:

hi, all:

 

i want to add a function in xen. in the function i need to call the "printk" to display the values of some variables.

 

i found the definition of printk() in file "xen-3.1.0-src\xen\include\xen\lib.h ":

 

extern void printk(const char *format, ...)

    __attribute__ ((format (printf, 1, 2)));

 

who can tell me the location of printk()?

 

thanks in advance.

 

2008-04-26

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Haifeng Fang

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