modules_install:
$(MAKE) -C $(KERNELDIR) M=$(PWD) modules_install
clean:
rm -rf *.o *~core .depend .*.cmd *.ko *.ko.* *.mod.c .tmp_versions *odule* $(TARGET)
obj-m:=mod2.o
mod2-y:=mod_b.o
KBUILD_EXTRA_SYMBOLS=~/fulinux/export_symbol/mod1/Module.symvers
KERNELDIR := /lib/modules/$(shell uname -r)/build
PWD:=$(shell pwd)
modules:
$(MAKE) -C $(KERNELDIR) M=$(PWD) modules
modules_install:
$(MAKE) -C $(KERNELDIR) M=$(PWD) modules_install
clean:
rm -rf *.o *~core .depend .*.cmd *.ko *.ko.* *.mod.c .tmp_versions *odule* $(TARGET)
在编译加载如下：
[lingyun@localhost mod2]$ make
make -C /lib/modules/2.6.32-279.el6.x86_64/build M=/usr/local/src/lingyun/fulinux/export_symbol/mod2 modules
make[1]: Entering directory `/usr/src/kernels/2.6.32-279.el6.x86_64'
CC [M] /usr/local/src/lingyun/fulinux/export_symbol/mod2/mod_b.o
LD [M] /usr/local/src/lingyun/fulinux/export_symbol/mod2/mod2.o
Building modules, stage 2.
MODPOST 1 modules
CC /usr/local/src/lingyun/fulinux/export_symbol/mod2/mod2.mod.o
LD [M] /usr/local/src/lingyun/fulinux/export_symbol/mod2/mod2.ko.unsigned
NO SIGN [M] /usr/local/src/lingyun/fulinux/export_symbol/mod2/mod2.ko
make[1]: Leaving directory `/usr/src/kernels/2.6.32-279.el6.x86_64'
[lingyun@localhost mod2]$ sudo insmod mod2.ko
[lingyun@localhost mod2]$
[lingyun@localhost mod2]$ dmesg | grep "In Func:"
In Func: func1...
In Func: func2...
可见模块二调用模块一的func1成功！！！