119 lines
2.2 KiB
C
119 lines
2.2 KiB
C
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/*
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* Loadable driver which provides the ability to generate a kernel
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* protection fault. Mainly useful for testing the address translation
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* capabilities of klogd.
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*
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* Fri Oct 27 14:34:27 CDT 1995: Dr. Wettstein
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*
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* Initial version.
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*/
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#define NEW_MODULES
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/* Kernel includes. */
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#include <linux/kernel.h>
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#include <linux/config.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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/* Standard module stuff. */
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#if defined(NEW_MODULES)
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#include <linux/module.h>
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#else
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#include <linux/module.h>
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#include <linux/version.h>
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char kernel_version[] = UTS_RELEASE;
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#endif
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static int major = 32;
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#ifdef MODULE
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static int oops_ioctl(struct inode *, struct file *, unsigned int cmd, unsigned long arg);
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static int oops_open(struct inode * node, struct file * file);
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static void oops(void);
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static struct symbol_table these_symbols = {
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#include <linux/symtab_begin.h>
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X(oops_open),
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X(oops_ioctl),
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X(oops),
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#include <linux/symtab_end.h>
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};
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/* driver specific module definitions */
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static struct file_operations oops_fops1 = {
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NULL, /* hw_lseek */
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NULL, /* hw_read */
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NULL, /* write */
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NULL, /* hw_readdir */
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NULL, /* hw_select */
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oops_ioctl, /* hw_ioctl */
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NULL, /* mmap */
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oops_open, /* hw_open */
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NULL, /* hw_release */
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NULL /* fsync */
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};
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static int oops_open(struct inode * node, struct file * file)
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{
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printk("Called oops_open.\n");
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return(0);
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}
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static int oops_ioctl(struct inode * node, struct file * file, \
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unsigned int cmd, unsigned long arg)
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{
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printk("Called oops_ioctl.\n");
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printk("Cmd: %d, Arg: %ld\n", cmd, arg);
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if ( cmd == 1 )
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{
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oops();
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}
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return(0);
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}
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static void oops()
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{
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auto unsigned long *p = (unsigned long *) 828282828;
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*p = 5;
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return;
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}
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int
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init_module(void)
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{
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printk("oops: Module initilization.\n");
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if (register_chrdev(major, "oops", &oops_fops1)) {
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printk("register_chrdev failed.");
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return -EIO;
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}
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printk("oops: Registering symbols.\n");
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register_symtab(&these_symbols);
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return 0;
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}
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void
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cleanup_module(void)
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{
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/* driver specific cleanups, ususally "unregister_*()" */
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printk("oops: Module unloadeding.\n");
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if (unregister_chrdev(major, "oops") != 0)
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printk("cleanup_module failed\n");
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else
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printk("cleanup_module succeeded\n");
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return;
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}
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#endif /* MODULE */
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