Date: Tue, 9 Apr 2002 18:23:33 -0700 (PDT) From: "Kamal R. Prasad" <kamalpr@yahoo.com> To: freebsd-gnats-submit@FreeBSD.org Subject: i386/36944: kldload causes kernel panic Message-ID: <200204100123.g3A1NX604113@freefall.freebsd.org>
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>Number: 36944
>Category: i386
>Synopsis: kldload causes kernel panic
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Apr 09 18:30:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Kamal R. Prasad
>Release: 4.5-STABLE
>Organization:
>Environment:
>Description:
I have a sample device driver which when we try to load, causes a kernel panic because of a page fault. (Im new to device drivers so pl. excuse me for any bugs in the code). the c code(chardev_example.c) is pasted below:-
-----------------------------------------------
#include <sys/types.h>
#include <sys/module.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/kernel.h>
static int chardev_example_load(struct module* m, int what, void* ar
{
int err = 0;
switch (what)
{
case MOD_LOAD : uprintf("skeleton kld loaded\n");
break;
case MOD_UNLOAD : uprintf("skeleton kld un-loaded\n"
break;
default:
err = EINVAL;
break;
}
return err;
}
DECLARE_MODULE(chardev_example, chardev_example_load, SI_SUB_KLD, SI_ORDER_ANY);
----------------------------------------------------------
the Makefile is pasted below:-
-----------------------------------------
SRCS=chardev_example.c
KMOD=chardev_example
.include <bsd.kmod.mk>
-----------------------------------------
>How-To-Repeat:
make
kldload -v ./chardev_example.ko
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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