Hi,
I search the list archives for a solution to my problem but all suggestions
that I find doesn't work.
I'm trying to do a simple hello world module for uClinux, the ismod command
starts the module (it's shown by lsmod) but it doesn't print anything. I
follow the steps of chapters two and four of Linux Device Drivers (2nd
edition) but it doesn't work yet. So i have both busybox syslogd and klogd
running, and the other messages, like sucessfull login message, are
correctly logged into the log file.
I also try reading from /proc/kmsg without syslogd/klogd running but the
message never are there and also not appear in the terminal (I have the
option "Console on UARTLITE" checked if it's mind (but with this option
unchecked also doesn't work)).
I put the hello.c on uClinux-dist/linux-2.4.x/drivers/char and add a line
'obj-m +=hello.o' to the Makefile on this folder. I try with the original
hello world module example from LDD and the source (desperate edited :)) you
can see bellow.
I'm using the version from CVS the uname -a gives: "Linux uclinux-auto
2.4.34.5-uc0 #120 Ter Ago 14 11:37:36 BRT 2007 microblaze".
I am running the system in a a Digilent XUVP board. I know that is a very
boring topic but I already search the list but don't find anything useful.
Thanks in advance, Josue.
#define MODULE
#include <linux/module.h>
#include <linux/kernel.h>
int init_module(void)
{
printk(KERN_CRIT "Hello, world\n");
printk("<0>Hello, world\n");
printk("<1>Hello, world\n");
printk("<4>Hello, world\n");
printk("<6>Hello, world\n");
printk(KERN_CRIT "<1>I'm trashed; giving up on");
}
void cleanup_module(void)
{
printk("Goodbye cruel world\n");
printk("<0>Goodbye cruel world\n");
printk("<1>Goodbye cruel world\n");
printk("<4>Goodbye cruel world\n");
printk("<6>Goodbye cruel world\n");
}
module_init(init_module);
module_exit(cleanup_module);
-
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