On Sun, Aug 22, 2010 at 6:11 PM, Robert P. J. Day <rpjday@xxxxxxxxxxxxxx> wrote:
>
> i'm just catching up with this thread and, if i read it correctly,
> the goal is to build a loadable kernel module using the proper
> incantation and options on the gcc command line, is that correct?
Yes yes right
>but
> i'm not sure i see the value in tha
I was reading and trying to understand the programs given in the Linux
Magazine to which I have posted the links.
>t -- why not just build the module
> using all of the compilation infrastructure built into the kernel
> source Makefile and accompanying build structure?
Sure here is my Makefile
ifeq($(KERNELRELEASE),)
KERNELDIR ?= /lib/modules/$(shell uname -r)/build
PWD := $(shell pwd)
.PHONY: build clean
build:
$(MAKE) -C $(KERNELDIR) M=$(PWD) modules
clean:
rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c
rm -rf modules.order Module.symvers
else
$(info Building with KERNELRELEASE =${KERNELRELEASE})
obj-m := sample2.o
endif
I did make but I got following error
Makefile:1: *** missing separator. Stop.
I will try the Makefile approach also.
Since till now I just was trying an approach the author had described
so had not tried Makefile.
> not trying to market, but i explain how to do that here:
>
> http://crashcourse.ca/introduction-linux-kernel-programming/introduction-linux-kernel-programming
:)
> in the first few lessons, which are publicly available to everyone.
>
> granted, you *can* reproduce all of that manually if you want, but i
> don't see the point in making this any more difficult than it has to
> be. of course, if i've misunderstood what this thread is about, you
> can ignore all this. :-)
>
No if interested do stay in this thread.
I am not sure if the program in magazine is wrong or correct
or what did the author tried to convey?
Specially the asm_linkage part what is the author trying to explain the readers.
>
> p.s. specifically, i demonstrate how to build your first kernel
> module here:
>
> http://crashcourse.ca/introduction-linux-kernel-programming/lesson-4-writing-and-running-your-first-kernel-module
>
> again, that lesson is publicly available to everyone.
Ya I found it quite useful.
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