Thanks, I managed to get a little further.
Just stating -fno-stack-protector in the bash variable CC wasn't enough. I
had to manually change a few Makefile's to get this flag in. I now still
have these missing symbols while executing modprobe:
_GLOBAL_OFFSET_TABLE_
lirc_unregister_plugin
lirc_register_plugin
With Google I found a reference which states that _GLOBAL_OFFSET_TABLE_ has
something to do with position independent code. Another flag then. What is
the appropriate way to compile a module, regarding -pie -fpie?
Thanks in advance, Warren
From: Robert Connolly <[EMAIL PROTECTED]>
Reply-To: Hardened LFS Development List <[email protected]>
To: Hardened LFS Development List <[email protected]>
Subject: Re: Building 3rd party program fails (lirc)
Date: Wed, 01 Mar 2006 18:44:11 -0500
Use -fno-stack-protector when building kernel modules. The vanilla kernel
has
its own overflow detection, and adding ssp on top doesn't seem to offer any
advantage, so the kernel and modules should be built without ssp.
robert
On March 1, 2006 02:28 pm, Warren Wilder wrote:
> I'm trying to compile lirc: Linux Infrared Remote Control
>
> I know this list is not really meant to answer any and all software
> problems, but the lirc mailling list isn't very responsive. I've only
had a
> few replies from users; mentioning that they ran into the same problem
and
> opted for no longer using a hardened system, changing their kernel, or
> whatever. I'm hoping there is a real solution.
>
> I'm basically asking for a theoretical answer, but anyone with actual
hands
> on lirc compiling experience is of course very welcome with their
advice.
> When compiling the module which communicates with /dev/ttyS0, these
> warnings fly by:
>
> *** Warning: "lirc_unregister_plugin"
> [/usr/src/lirc/lirc-0.8.0/drivers/lirc_serial/lirc_serial.ko] undefined!
> *** Warning: "lirc_register_plugin"
> [/usr/src/lirc/lirc-0.8.0/drivers/lirc_serial/lirc_serial.ko] undefined!
> *** Warning: "__guard"
> [/usr/src/lirc/lirc-0.8.0/drivers/lirc_serial/lirc_serial.ko] undefined!
> *** Warning: "__stack_smash_handler"
> [/usr/src/lirc/lirc-0.8.0/drivers/lirc_serial/lirc_serial.ko] undefined!
>
> After the compilation, running modprobe lirc_serial reveals pretty much
the
> same messages, but without the warning part.
> I'm not much of a programmer, so I'm not sure what this program is doing
> differently. Somehow it is not using libc? It is linking against my
kernel
> source though.
>
> Warren
>
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