From: sundarcs@gwu.edu (Sunny)
To: kernelnewbies@lists.kernelnewbies.org
Subject: [kernel]which the file define the variable of "phys_base"?
Date: Mon, 24 Feb 2014 13:33:48 -0500 [thread overview]
Message-ID: <279E4871-8503-46A7-93EF-A7ED65CBDF50@gwu.edu> (raw)
In-Reply-To: <CA+5jrfnaVzJgoWjb2TE=qNSFWB9uJQBs5HyLtkeSzOcprynv6Q@mail.gmail.com>
Hi,
I?m not sure about the ?pays_base? warning, but your code runs fine in my machine. What happens if you ignore the warning and load the module anyway?
- Sunny
On Feb 24, 2014, at 9:04 AM, lx <lxlenovostar@gmail.com> wrote:
> hi all:
> the codes is:
> #########################################
> #include <linux/module.h> // for printk()
> #include <linux/mm.h> // for struct page
> #include <asm/page.h> // for struct page
> #include <asm/pgtable.h> // for ZERO_PAGE
>
> static int __init init_hello( void )
> {
> int i;
> struct page * zero_page;
> printk( "\n Kello, the first! \n\n" );
> i = 0x100;
> zero_page = ZERO_PAGE(&i);
> printk(" the ZERO address is %p", zero_page);
> return 0;
> }
>
> static void __exit exit_hello( void )
> {
> printk( "\n Goodbye now... \n\n" );
> }
>
> MODULE_LICENSE("GPL");
> module_init(init_hello);
> module_exit(exit_hello);
> #########################################
>
> I complier it. by:
> #########################################
> make -C /lib/modules/`uname -r`/build M=`pwd`
> #########################################
>
> the results is:
> #########################################
> [root at localhost kernel_test]# make -C /lib/modules/`uname -r`/build M=`pwd`
> make: Entering directory `/usr/src/kernels/2.6.18-308.el5-x86_64'
> CC [M] /opt/lx/kernel/kernel_test/zero.o
> Building modules, stage 2.
> MODPOST
> WARNING: "phys_base" [/opt/lx/kernel/kernel_test/zero.ko] undefined!
> LD [M] /opt/lx/kernel/kernel_test/zero.ko
> make: Leaving directory `/usr/src/kernels/2.6.18-308.el5-x86_64'
> #########################################
>
> I try to find the file which defined the "phys_base", for examples;
> phys_base
>
> Defined as a variable in:
> arch/sparc/mm/init.c, line 40
> arch/sparc64/kernel/sparc64_ksyms.c, line 110
> arch/sparc64/mm/init.c, line 47
> include/asm-sparc/page.h, line 160
> include/asm-sparc/pgtable.h, line 122
> include/asm-sparc64/pgtable.h, line 227
>
> But I can't find the file of init.c in my computer. Please tell me some ways to solve it, thank you.
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
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next prev parent reply other threads:[~2014-02-24 18:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-24 14:04 [kernel]which the file define the variable of "phys_base"? lx
2014-02-24 18:33 ` Sunny [this message]
[not found] ` <CA+5jrfmAX7GR=TLD3GHqSnyek56mgZQ9uyw2WirJhEr9om7q_Q@mail.gmail.com>
2014-02-25 12:54 ` Sunny
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