Moudles Code:
#############################################################
mod1.c
#include<linux/init.h>
#include<linux/module.h>
#include<linux/kernel.h>
static int func1(void)
{
printk("In Func: %s...\n",__func__);
return 0;
}
EXPORT_SYMBOL(func1);
static int __init hello_init(void)
{
printk("Module 1,Init!\n");
return 0;
}
static void __exit hello_exit(void)
{
printk("Module 1,Exit!\n");
}
module_init(hello_init);
module_exit(hello_exit);
#############################################################
mod2.c
#include<linux/init.h>
#include<linux/kernel.h>
#include<linux/module.h>
static int func2(void)
{
extern int func1(void);
func1();
printk("In Func: %s...\n",__func__);
return 0;
}
static int __init hello_init(void)
{
printk("Module 2,Init!\n");
func2();
return 0;
}
static void __exit hello_exit(void)
{
printk("Module 2,Exit!\n");
}
module_init(hello_init);
module_exit(hello_exit);
################################################################
Makefile
ifneq ($(KERNELRELEASE),)
obj-m := XXXX.o
else
KDIR := /lib/modules/$(shell uname -r)/build
PWD := $(shell pwd)
default:
$(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules
clean:
rm -rf Module.symvers *.ko *.o *.mod.c .*.cmd .tmp_versions
endif
#############################################################
2008/8/2 fisherman <[EMAIL PROTECTED]>:
> module A and module B, module A export symbol func a, module B using func a.
> Both modules using GPL.
>
> #insmod ./mod1.ko
> #insmod ./mod2.ko
>
> #tail /var/log/kern.log
> Aug 1 23:47:27 dell-desktop kernel: [ 7029.008527] mod2: no symbol
> version for func1
> Aug 1 23:47:27 dell-desktop kernel: [ 7029.008534] mod2: Unknown symbol func1
>
> But in /proc/kallsyms, we can find the func a's symbol.
>
> I test modules in 2.6.22 and 2.6.24, both can be right insmoded without
> errors.
>
> BTW: The 2.6.26 kernel is compiled by myself.
> CONFIG_MODULES=y
> # CONFIG_MODULE_FORCE_LOAD is not set
> CONFIG_MODULE_UNLOAD=y
> # CONFIG_MODULE_FORCE_UNLOAD is not set
> CONFIG_MODVERSIONS=y
> CONFIG_MODULE_SRCVERSION_ALL=y
> CONFIG_KMOD=y
>
> --
> Best Regards :-)
> -------------------------------------------
> Wang Yao(王耀),[EMAIL PROTECTED] [EMAIL PROTECTED] wangyao01＠baidu.com
> [EMAIL PROTECTED]
> HomePage: http://cudev.cublog.cn
> IBM Club Harbin Institute Of Technology
> Address:NO.92 West Da-Zhi Street,NanGang District,Harbin,Heilongjiang
>
--
Best Regards :-)
-------------------------------------------
Wang Yao(王耀),[EMAIL PROTECTED] [EMAIL PROTECTED] wangyao01＠baidu.com
[EMAIL PROTECTED]
HomePage: http://cudev.cublog.cn
IBM Club Harbin Institute Of Technology
Address:NO.92 West Da-Zhi Street,NanGang District,Harbin,Heilongjiang
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