how to use printk() in xen?

how to use printk() in xen?

[Haifeng Fang]

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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 



Haifeng Fang 

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RE: how to use printk() in xen?

[Wei, Gang]

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xen/drivers/char/console.c
 
Jimmy

________________________________

From: xen-devel-bounces@lists.xensource.com
[mailto:xen-devel-bounces@lists.xensource.com] On Behalf Of Haifeng Fang
Sent: Saturday, April 26, 2008 9:00 PM
To: xen-devel
Subject: [Xen-devel] how to use printk() in xen?


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 
________________________________

Haifeng Fang 

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Fw: Re: Re: how to use printk() in xen?

[Haifeng Fang]

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2008-04-26



Haifeng Fang



发件人： Haifeng Fang
发送时间： 2008-04-26 22:16:06
收件人： Hwandori
抄送： 
主题： Re: Re: [Xen-devel] how to use printk() in xen?

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 



Haifeng Fang 



发件人： Hwandori 
发送时间： 2008-04-26  21:05:46 
收件人： fhf25@126.com 
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@126.com>:

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 



Haifeng Fang 

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Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

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Re: Re: Re: how to use printk() in xen?

[Haifeng Fang]

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thanks for you.

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


2008-04-27 



Haifeng Fang 



发件人： Hwandori 
发送时间： 2008-04-27  01:38:35 
收件人： fhf25@126.com 
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@126.com>:

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 



Haifeng Fang 



发件人： Hwandori 
发送时间： 2008-04-26  21:05:46 
收件人： fhf25@126.com 
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@126.com>:

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 



Haifeng Fang 

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

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RE: Re: Re: how to use printk() in xen?

[Li, Xin B]

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seems your question is a C language problem :-)
-Xin


________________________________

	From: xen-devel-bounces@lists.xensource.com [mailto:xen-devel-bounces@lists.xensource.com] 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 
	
________________________________

	Haifeng Fang 
________________________________

	发件人： Hwandori 
	发送时间： 2008-04-27  01:38:35 
	收件人： fhf25@126.com 
	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@126.com>:
	

		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 
		
________________________________

		Haifeng Fang 
________________________________

		发件人： Hwandori 
		发送时间： 2008-04-26  21:05:46 
		收件人： fhf25@126.com 
		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@126.com>:
		

			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 
			
________________________________

			Haifeng Fang 

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




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