I've compiled a basic hello world Android kernel module using goldfish
2.6.29 for the emulator
Code:
#include /* Needed by all modules */
#include /* Needed for KERN_INFO */
#include /* Needed for the macros */
static int hello3_data __initdata = 3;
static int __init hello_3_init(void)
{
printk(KERN_INFO "Hello, world %d\n", hello3_data);
return 0;
}
static void __exit hello_3_exit(void)
{
printk(KERN_INFO "Goodbye, world 3\n");
}
module_init(hello_3_init);
module_exit(hello_3_exit);
and written the following in the Makefile :
Code:
VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 29
EXTRAVERSION =
obj-m += hello_3.o
KDIR=/home/aniket/beproject/htconev/android/goldfish
PWD := $(shell pwd)
all:
make -C $(KDIR) ARCH=arm
CROSS_COMPILE=/home/aniket/beproject/android/android-ndk-r9c/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi-
SUBDIRS=$(PWD) modules
clean:
make -C $(KDIR) ARCH=arm
CROSS_COMPILE=/home/aniket/beproject/android/android-ndk-r9c/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi-
SUBDIRS=$(PWD) clean
However after running make, pushing it to the Android device and running
insmod it gives me an error :
insmod: init_module _.ko failed (Exec format error)
I got rid of that error using
Code:
make CFLAGS_MODULE=-fno-pic
on the kernel module
Now i can use insmod module.ko and module gets installed and is shown as
live by running cat /proc/modules
However dmesg gives the output as :
hello_3: module license 'unspecified' taints kernel.
hello_3: unknown relocation: 27
hello_3: no version for "magic" found: kernel tainted.
Can anyone please tell me where I've gone wrong ?
--
--
unsubscribe: android-kernel+unsubscr...@googlegroups.com
website: http://groups.google.com/group/android-kernel
---
You received this message because you are subscribed to the Google Groups
"Android Linux Kernel Development" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to android-kernel+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
