Re: [microblaze-uclinux] Loadable module support for Petalinux w/MMU?

[Steven Hein <ssh@xxxxxxx>]

John Williams wrote:
> Hi Steve,
>
> Steven Hein wrote:
>
> > Does anyone have loadable kernel module support working in
> > the Petalinux w/ the Microaze MMU enabled? I tried to build
> > the kernel with module support enabled, and I got this
> > compile error:
>
> This was discussed a couple of months ago, and I posted a patch.  It 
> will be in the archives, but let us know if you are unable to track it 
> down.
>
> cheers,
Thanks John, I found it.

After applying the patch, the printk's work.....however, I am now
having troubles with strings that are statically initialized in a
structure.     Here's a simple example:



#include <linux/module.h>
#include <linux/types.h>

static struct attribute tstattr  = { .name = "tstattr", .mode = 0654, 
.owner = THIS_MODULE };

static void __exit
hello_exit (void)
{
       return;
}

static int __init
hello_init (void)
{
       printk ("name=|%s| mode=0%o\n", tstattr.name, tstattr.mode);

       return 0;
}

module_init (hello_init);
module_exit (hello_exit);


When I load this module (compiled with mb-linux-gcc), I see:

# insmod 
/tmp/hello.ko                                                         
name=|hello| mode=0654

The value of tstattr.name is printed as "hello", not as "tstattr"
which it should be!
(Note that the string I see within the |'s varies depending on the
complexity of the loadable module.    The original problem I
was trying to debug was problems creating a sysfs file.    Based
on the output in those cases, I could see that this isn't a simple
printk problem, but a problem with the initialization of the
string.)


Can anyone offer any insight into this type of problem?

Thanks,
Steve



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