From d78ee04c351350f8da89a462d7597678fc03c6f9 Mon Sep 17 00:00:00 2001
From: tv <tv@xso>
Date: Thu, 8 Sep 2011 13:05:36 +0200
Subject: //DNA: add //-Verkrebsung

---
 DNA/kernelroll.c | 139 -------------------------------------------------------
 1 file changed, 139 deletions(-)
 delete mode 100644 DNA/kernelroll.c

(limited to 'DNA/kernelroll.c')

diff --git a/DNA/kernelroll.c b/DNA/kernelroll.c
deleted file mode 100644
index 8445129f..00000000
--- a/DNA/kernelroll.c
+++ /dev/null
@@ -1,139 +0,0 @@
-/*
- * kernelroll - linux kernel module for advanced rickrolling
- * Copyright (C) 2011 Franz Pletz <fpletz@fnordicwalking.de>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/module.h> 
-#include <linux/kernel.h> 
-#include <linux/init.h> 
-#include <asm/unistd.h> 
-#include <linux/syscalls.h>
-#include <asm/amd_nb.h>
-#include <linux/highuid.h>
-
-#define GPF_DISABLE write_cr0(read_cr0() & (~ 0x10000))
-#define GPF_ENABLE write_cr0(read_cr0() | 0x10000)
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Franz Pletz");
-MODULE_DESCRIPTION("for teh lulz!");
-
-char *rollfile;
-void **sys_call_table = (void **)0xffffffff81400300; /* TODO: change */
-
-module_param(rollfile, charp, 0000);
-MODULE_PARM_DESC(rollfile, "music trolling file");
-
-module_param(sys_call_table, ulong, 0000);
-MODULE_PARM_DESC(sys_call_table, "address of the system call table");
-
-/* currently not working try for finding the sys_call_table ourselves */
-unsigned long **find_sys_call_table(void) 
-{
-    unsigned long **sctable;
-    unsigned long ptr;
-
-    sctable = NULL;
-    for (ptr = (unsigned long)&amd_nb_misc_ids;
-            ptr < (unsigned long)&overflowgid; 
-            ptr += sizeof(void *))
-    {
-        unsigned long *p;
-        p = (unsigned long *)ptr;
-        if(p[__NR_close] == (unsigned long) sys_close)
-        {
-            sctable = (unsigned long **)p;
-            return &sctable[0];
-        }
-    }
-    return NULL;
-}
-
-
-asmlinkage int (*o_open)(const char *path, int oflag, mode_t mode); 
-asmlinkage int my_open(const char *path, int oflag, mode_t mode) 
-{
-    int len = strlen(rollfile) + 1;
-    char* p;
-    int r;
-
-    p = (char *)(path + strlen(path) - 4);
-
-    if(rollfile != NULL && !strcmp(p, ".mp3")) {
-        void *buf = kmalloc(len, GFP_KERNEL);
-        memcpy(buf, path, len);
-        printk(KERN_INFO "patching %s with %s\n", path, rollfile);
-        memcpy((void *)path, rollfile, len);
-        r = o_open(path, oflag, mode);
-        memcpy((void *)path, buf, len);
-        kfree(buf);
-    } else {
-        r = o_open(path, oflag, mode);
-    }
-
-
-    return r;
-} 
-
-
-void set_addr_rw(unsigned long addr) {
-
-    unsigned int level;
-    pte_t *pte = lookup_address(addr, &level);
-
-    if(pte->pte &~ _PAGE_RW) pte->pte |= _PAGE_RW;
-
-}
-
-void set_addr_ro(unsigned long addr) {
-
-    unsigned int level;
-    pte_t *pte = lookup_address(addr, &level);
-
-    pte->pte = pte->pte &~_PAGE_RW;
-
-}
-
-static int __init init_rickroll(void) 
-{
-    //sys_call_table = find_sys_call_table();
-    if(sys_call_table == NULL)
-    {
-        printk(KERN_ERR "Cannot find the system call address\n"); 
-        return -1;  /* do not load */
-    } else {
-        printk(KERN_INFO "System call table found @ %lx\n", (unsigned long)sys_call_table);
-    }
-
-    set_addr_rw((unsigned long)sys_call_table);
-    GPF_DISABLE;
-
-    o_open = (int(*)(const char *, int, mode_t))(sys_call_table[__NR_open]); 
-    sys_call_table[__NR_open] = (void *) my_open; 
-
-    return 0; 
-} 
-
-static void __exit exit_rickroll(void) 
-{ 
-    sys_call_table[__NR_open] = (void *) o_open; 
-
-    set_addr_ro((unsigned long)sys_call_table);
-    GPF_ENABLE;
-} 
-
-module_init(init_rickroll); 
-module_exit(exit_rickroll); 
-- 
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