login
Search
I think I'm gonna kill myself. This is so stupid... Of course I've looked for a solution all over the net and beyond. No luck, except for the fact that it could be somehow related to linux/unistd.h. I've modified such file and no luck again.
Here is my Makefile:
obj-m += deiso.o
all:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
clean:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
Here is the make output:
make -C /lib/modules/2.6.12-9-386/build M=/home/kesher/proyectos/deiso modules
make[1]: Entering directory `/usr/src/linux-headers-2.6.12-9-386'
CC [M] /home/kesher/proyectos/deiso/deiso.o
Building modules, stage 2.
MODPOST
*** Warning: "errno" [/home/kesher/proyectos/deiso/deiso.ko] undefined!
CC /home/kesher/proyectos/deiso/deiso.mod.o
LD [M] /home/kesher/proyectos/deiso/deiso.ko
make[1]: Leaving directory `/usr/src/linux-headers-2.6.12-9-386'
And of course insmod refuses to load deiso.ko because of the undefined reference.
Any help appreciated
THANKS
Oops
I forgot to comment that I make NO USE of errno in my code.
Errno
Sounds like you may be trying to use a userspace library function that references errno.
I don't think so, these are m
I don't think so, these are my headers:
#include
#include
#include /* este contiene los numeros de las llamadas al sistema __NR_... */
#include /* para los semaforos */
#include /* para la estructura "current" */
#include
#include
Sorry, these are: #include
Sorry, these are:
#include linux/module.h
#include linux/errno.h
#include linux/unistd.h /* este contiene los numeros de las llamadas al sistema __NR_... */
#include linux/rwsem.h /* para los semaforos */
#include linux/sched.h /* para la estructura "current" */
#include linux/proc_fs.h
#include linux/syscalls.h
Weird
I have fixed it by adding this line to my source:
int errno;
Does this make any sense?
Maybe you are using syscalls
Maybe you are using syscalls in your code (defined by using _syscallN or by using execve(), defined in asm/unistd.h, at least for i386)? They refer to errno.
Adding errno variable to module will work, but it is not a good idea to use value of it, if this is not done with some sort of lock held.
You're right, I use _syscal
You're right, I use _syscalls! Thanks, I won't use errno
Maybe you are using syscalls
Maybe you are using syscalls in your code (defined by using _syscallN or by using execve(), defined in asm/unistd.h, at least for i386)? They refer to errno.
Adding errno variable to module will work, but it is not a good idea to use value of it, if this is not done with some sort of lock held.