Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2108 insertions, 0 deletions

diff --git a/kernel/module.c b/kernel/module.c
new file mode 100644
index 00000000000..2dbfa0773fa
--- /dev/null
+++ b/kernel/module.c
@@ -0,0 +1,2108 @@
+/* Rewritten by Rusty Russell, on the backs of many others...
+   Copyright (C) 2002 Richard Henderson
+   Copyright (C) 2001 Rusty Russell, 2002 Rusty Russell IBM.
+
+    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 2 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, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/moduleloader.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/elf.h>
+#include <linux/seq_file.h>
+#include <linux/syscalls.h>
+#include <linux/fcntl.h>
+#include <linux/rcupdate.h>
+#include <linux/cpu.h>
+#include <linux/moduleparam.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/vermagic.h>
+#include <linux/notifier.h>
+#include <linux/stop_machine.h>
+#include <linux/device.h>
+#include <asm/uaccess.h>
+#include <asm/semaphore.h>
+#include <asm/cacheflush.h>
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(fmt , a...)
+#endif
+
+#ifndef ARCH_SHF_SMALL
+#define ARCH_SHF_SMALL 0
+#endif
+
+/* If this is set, the section belongs in the init part of the module */
+#define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1))
+
+/* Protects module list */
+static DEFINE_SPINLOCK(modlist_lock);
+
+/* List of modules, protected by module_mutex AND modlist_lock */
+static DECLARE_MUTEX(module_mutex);
+static LIST_HEAD(modules);
+
+static DECLARE_MUTEX(notify_mutex);
+static struct notifier_block * module_notify_list;
+
+int register_module_notifier(struct notifier_block * nb)
+{
+	int err;
+	down(&notify_mutex);
+	err = notifier_chain_register(&module_notify_list, nb);
+	up(&notify_mutex);
+	return err;
+}
+EXPORT_SYMBOL(register_module_notifier);
+
+int unregister_module_notifier(struct notifier_block * nb)
+{
+	int err;
+	down(&notify_mutex);
+	err = notifier_chain_unregister(&module_notify_list, nb);
+	up(&notify_mutex);
+	return err;
+}
+EXPORT_SYMBOL(unregister_module_notifier);
+
+/* We require a truly strong try_module_get() */
+static inline int strong_try_module_get(struct module *mod)
+{
+	if (mod && mod->state == MODULE_STATE_COMING)
+		return 0;
+	return try_module_get(mod);
+}
+
+/* A thread that wants to hold a reference to a module only while it
+ * is running can call ths to safely exit.
+ * nfsd and lockd use this.
+ */
+void __module_put_and_exit(struct module *mod, long code)
+{
+	module_put(mod);
+	do_exit(code);
+}
+EXPORT_SYMBOL(__module_put_and_exit);
+	
+/* Find a module section: 0 means not found. */
+static unsigned int find_sec(Elf_Ehdr *hdr,
+			     Elf_Shdr *sechdrs,
+			     const char *secstrings,
+			     const char *name)
+{
+	unsigned int i;
+
+	for (i = 1; i < hdr->e_shnum; i++)
+		/* Alloc bit cleared means "ignore it." */
+		if ((sechdrs[i].sh_flags & SHF_ALLOC)
+		    && strcmp(secstrings+sechdrs[i].sh_name, name) == 0)
+			return i;
+	return 0;
+}
+
+/* Provided by the linker */
+extern const struct kernel_symbol __start___ksymtab[];
+extern const struct kernel_symbol __stop___ksymtab[];
+extern const struct kernel_symbol __start___ksymtab_gpl[];
+extern const struct kernel_symbol __stop___ksymtab_gpl[];
+extern const unsigned long __start___kcrctab[];
+extern const unsigned long __start___kcrctab_gpl[];
+
+#ifndef CONFIG_MODVERSIONS
+#define symversion(base, idx) NULL
+#else
+#define symversion(base, idx) ((base) ? ((base) + (idx)) : NULL)
+#endif
+
+/* Find a symbol, return value, crc and module which owns it */
+static unsigned long __find_symbol(const char *name,
+				   struct module **owner,
+				   const unsigned long **crc,
+				   int gplok)
+{
+	struct module *mod;
+	unsigned int i;
+
+	/* Core kernel first. */ 
+	*owner = NULL;
+	for (i = 0; __start___ksymtab+i < __stop___ksymtab; i++) {
+		if (strcmp(__start___ksymtab[i].name, name) == 0) {
+			*crc = symversion(__start___kcrctab, i);
+			return __start___ksymtab[i].value;
+		}
+	}
+	if (gplok) {
+		for (i = 0; __start___ksymtab_gpl+i<__stop___ksymtab_gpl; i++)
+			if (strcmp(__start___ksymtab_gpl[i].name, name) == 0) {
+				*crc = symversion(__start___kcrctab_gpl, i);
+				return __start___ksymtab_gpl[i].value;
+			}
+	}
+
+	/* Now try modules. */ 
+	list_for_each_entry(mod, &modules, list) {
+		*owner = mod;
+		for (i = 0; i < mod->num_syms; i++)
+			if (strcmp(mod->syms[i].name, name) == 0) {
+				*crc = symversion(mod->crcs, i);
+				return mod->syms[i].value;
+			}
+
+		if (gplok) {
+			for (i = 0; i < mod->num_gpl_syms; i++) {
+				if (strcmp(mod->gpl_syms[i].name, name) == 0) {
+					*crc = symversion(mod->gpl_crcs, i);
+					return mod->gpl_syms[i].value;
+				}
+			}
+		}
+	}
+	DEBUGP("Failed to find symbol %s\n", name);
+ 	return 0;
+}
+
+/* Find a symbol in this elf symbol table */
+static unsigned long find_local_symbol(Elf_Shdr *sechdrs,
+				       unsigned int symindex,
+				       const char *strtab,
+				       const char *name)
+{
+	unsigned int i;
+	Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr;
+
+	/* Search (defined) internal symbols first. */
+	for (i = 1; i < sechdrs[symindex].sh_size/sizeof(*sym); i++) {
+		if (sym[i].st_shndx != SHN_UNDEF
+		    && strcmp(name, strtab + sym[i].st_name) == 0)
+			return sym[i].st_value;
+	}
+	return 0;
+}
+
+/* Search for module by name: must hold module_mutex. */
+static struct module *find_module(const char *name)
+{
+	struct module *mod;
+
+	list_for_each_entry(mod, &modules, list) {
+		if (strcmp(mod->name, name) == 0)
+			return mod;
+	}
+	return NULL;
+}
+
+#ifdef CONFIG_SMP
+/* Number of blocks used and allocated. */
+static unsigned int pcpu_num_used, pcpu_num_allocated;
+/* Size of each block.  -ve means used. */
+static int *pcpu_size;
+
+static int split_block(unsigned int i, unsigned short size)
+{
+	/* Reallocation required? */
+	if (pcpu_num_used + 1 > pcpu_num_allocated) {
+		int *new = kmalloc(sizeof(new[0]) * pcpu_num_allocated*2,
+				   GFP_KERNEL);
+		if (!new)
+			return 0;
+
+		memcpy(new, pcpu_size, sizeof(new[0])*pcpu_num_allocated);
+		pcpu_num_allocated *= 2;
+		kfree(pcpu_size);
+		pcpu_size = new;
+	}
+
+	/* Insert a new subblock */
+	memmove(&pcpu_size[i+1], &pcpu_size[i],
+		sizeof(pcpu_size[0]) * (pcpu_num_used - i));
+	pcpu_num_used++;
+
+	pcpu_size[i+1] -= size;
+	pcpu_size[i] = size;
+	return 1;
+}
+
+static inline unsigned int block_size(int val)
+{
+	if (val < 0)
+		return -val;
+	return val;
+}
+
+/* Created by linker magic */
+extern char __per_cpu_start[], __per_cpu_end[];
+
+static void *percpu_modalloc(unsigned long size, unsigned long align)
+{
+	unsigned long extra;
+	unsigned int i;
+	void *ptr;
+
+	BUG_ON(align > SMP_CACHE_BYTES);
+
+	ptr = __per_cpu_start;
+	for (i = 0; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) {
+		/* Extra for alignment requirement. */
+		extra = ALIGN((unsigned long)ptr, align) - (unsigned long)ptr;
+		BUG_ON(i == 0 && extra != 0);
+
+		if (pcpu_size[i] < 0 || pcpu_size[i] < extra + size)
+			continue;
+
+		/* Transfer extra to previous block. */
+		if (pcpu_size[i-1] < 0)
+			pcpu_size[i-1] -= extra;
+		else
+			pcpu_size[i-1] += extra;
+		pcpu_size[i] -= extra;
+		ptr += extra;
+
+		/* Split block if warranted */
+		if (pcpu_size[i] - size > sizeof(unsigned long))
+			if (!split_block(i, size))
+				return NULL;
+
+		/* Mark allocated */
+		pcpu_size[i] = -pcpu_size[i];
+		return ptr;
+	}
+
+	printk(KERN_WARNING "Could not allocate %lu bytes percpu data\n",
+	       size);
+	return NULL;
+}
+
+static void percpu_modfree(void *freeme)
+{
+	unsigned int i;
+	void *ptr = __per_cpu_start + block_size(pcpu_size[0]);
+
+	/* First entry is core kernel percpu data. */
+	for (i = 1; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) {
+		if (ptr == freeme) {
+			pcpu_size[i] = -pcpu_size[i];
+			goto free;
+		}
+	}
+	BUG();
+
+ free:
+	/* Merge with previous? */
+	if (pcpu_size[i-1] >= 0) {
+		pcpu_size[i-1] += pcpu_size[i];
+		pcpu_num_used--;
+		memmove(&pcpu_size[i], &pcpu_size[i+1],
+			(pcpu_num_used - i) * sizeof(pcpu_size[0]));
+		i--;
+	}
+	/* Merge with next? */
+	if (i+1 < pcpu_num_used && pcpu_size[i+1] >= 0) {
+		pcpu_size[i] += pcpu_size[i+1];
+		pcpu_num_used--;
+		memmove(&pcpu_size[i+1], &pcpu_size[i+2],
+			(pcpu_num_used - (i+1)) * sizeof(pcpu_size[0]));
+	}
+}
+
+static unsigned int find_pcpusec(Elf_Ehdr *hdr,
+				 Elf_Shdr *sechdrs,
+				 const char *secstrings)
+{
+	return find_sec(hdr, sechdrs, secstrings, ".data.percpu");
+}
+
+static int percpu_modinit(void)
+{
+	pcpu_num_used = 2;
+	pcpu_num_allocated = 2;
+	pcpu_size = kmalloc(sizeof(pcpu_size[0]) * pcpu_num_allocated,
+			    GFP_KERNEL);
+	/* Static in-kernel percpu data (used). */
+	pcpu_size[0] = -ALIGN(__per_cpu_end-__per_cpu_start, SMP_CACHE_BYTES);
+	/* Free room. */
+	pcpu_size[1] = PERCPU_ENOUGH_ROOM + pcpu_size[0];
+	if (pcpu_size[1] < 0) {
+		printk(KERN_ERR "No per-cpu room for modules.\n");
+		pcpu_num_used = 1;
+	}
+
+	return 0;
+}	
+__initcall(percpu_modinit);
+#else /* ... !CONFIG_SMP */
+static inline void *percpu_modalloc(unsigned long size, unsigned long align)
+{
+	return NULL;
+}
+static inline void percpu_modfree(void *pcpuptr)
+{
+	BUG();
+}
+static inline unsigned int find_pcpusec(Elf_Ehdr *hdr,
+					Elf_Shdr *sechdrs,
+					const char *secstrings)
+{
+	return 0;
+}
+static inline void percpu_modcopy(void *pcpudst, const void *src,
+				  unsigned long size)
+{
+	/* pcpusec should be 0, and size of that section should be 0. */
+	BUG_ON(size != 0);
+}
+#endif /* CONFIG_SMP */
+
+#ifdef CONFIG_MODULE_UNLOAD
+/* Init the unload section of the module. */
+static void module_unload_init(struct module *mod)
+{
+	unsigned int i;
+
+	INIT_LIST_HEAD(&mod->modules_which_use_me);
+	for (i = 0; i < NR_CPUS; i++)
+		local_set(&mod->ref[i].count, 0);
+	/* Hold reference count during initialization. */
+	local_set(&mod->ref[_smp_processor_id()].count, 1);
+	/* Backwards compatibility macros put refcount during init. */
+	mod->waiter = current;
+}
+
+/* modules using other modules */
+struct module_use
+{
+	struct list_head list;
+	struct module *module_which_uses;
+};
+
+/* Does a already use b? */
+static int already_uses(struct module *a, struct module *b)
+{
+	struct module_use *use;
+
+	list_for_each_entry(use, &b->modules_which_use_me, list) {
+		if (use->module_which_uses == a) {
+			DEBUGP("%s uses %s!\n", a->name, b->name);
+			return 1;
+		}
+	}
+	DEBUGP("%s does not use %s!\n", a->name, b->name);
+	return 0;
+}
+
+/* Module a uses b */
+static int use_module(struct module *a, struct module *b)
+{
+	struct module_use *use;
+	if (b == NULL || already_uses(a, b)) return 1;
+
+	if (!strong_try_module_get(b))
+		return 0;
+
+	DEBUGP("Allocating new usage for %s.\n", a->name);
+	use = kmalloc(sizeof(*use), GFP_ATOMIC);
+	if (!use) {
+		printk("%s: out of memory loading\n", a->name);
+		module_put(b);
+		return 0;
+	}
+
+	use->module_which_uses = a;
+	list_add(&use->list, &b->modules_which_use_me);
+	return 1;
+}
+
+/* Clear the unload stuff of the module. */
+static void module_unload_free(struct module *mod)
+{
+	struct module *i;
+
+	list_for_each_entry(i, &modules, list) {
+		struct module_use *use;
+
+		list_for_each_entry(use, &i->modules_which_use_me, list) {
+			if (use->module_which_uses == mod) {
+				DEBUGP("%s unusing %s\n", mod->name, i->name);
+				module_put(i);
+				list_del(&use->list);
+				kfree(use);
+				/* There can be at most one match. */
+				break;
+			}
+		}
+	}
+}
+
+#ifdef CONFIG_MODULE_FORCE_UNLOAD
+static inline int try_force(unsigned int flags)
+{
+	int ret = (flags & O_TRUNC);
+	if (ret)
+		tainted |= TAINT_FORCED_MODULE;
+	return ret;
+}
+#else
+static inline int try_force(unsigned int flags)
+{
+	return 0;
+}
+#endif /* CONFIG_MODULE_FORCE_UNLOAD */
+
+struct stopref
+{
+	struct module *mod;
+	int flags;
+	int *forced;
+};
+
+/* Whole machine is stopped with interrupts off when this runs. */
+static int __try_stop_module(void *_sref)
+{
+	struct stopref *sref = _sref;
+
+	/* If it's not unused, quit unless we are told to block. */
+	if ((sref->flags & O_NONBLOCK) && module_refcount(sref->mod) != 0) {
+		if (!(*sref->forced = try_force(sref->flags)))
+			return -EWOULDBLOCK;
+	}
+
+	/* Mark it as dying. */
+	sref->mod->state = MODULE_STATE_GOING;
+	return 0;
+}
+
+static int try_stop_module(struct module *mod, int flags, int *forced)
+{
+	struct stopref sref = { mod, flags, forced };
+
+	return stop_machine_run(__try_stop_module, &sref, NR_CPUS);
+}
+
+unsigned int module_refcount(struct module *mod)
+{
+	unsigned int i, total = 0;
+
+	for (i = 0; i < NR_CPUS; i++)
+		total += local_read(&mod->ref[i].count);
+	return total;
+}
+EXPORT_SYMBOL(module_refcount);
+
+/* This exists whether we can unload or not */
+static void free_module(struct module *mod);
+
+static void wait_for_zero_refcount(struct module *mod)
+{
+	/* Since we might sleep for some time, drop the semaphore first */
+	up(&module_mutex);
+	for (;;) {
+		DEBUGP("Looking at refcount...\n");
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		if (module_refcount(mod) == 0)
+			break;
+		schedule();
+	}
+	current->state = TASK_RUNNING;
+	down(&module_mutex);
+}
+
+asmlinkage long
+sys_delete_module(const char __user *name_user, unsigned int flags)
+{
+	struct module *mod;
+	char name[MODULE_NAME_LEN];
+	int ret, forced = 0;
+
+	if (!capable(CAP_SYS_MODULE))
+		return -EPERM;
+
+	if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0)
+		return -EFAULT;
+	name[MODULE_NAME_LEN-1] = '\0';
+
+	if (down_interruptible(&module_mutex) != 0)
+		return -EINTR;
+
+	mod = find_module(name);
+	if (!mod) {
+		ret = -ENOENT;
+		goto out;
+	}
+
+	if (!list_empty(&mod->modules_which_use_me)) {
+		/* Other modules depend on us: get rid of them first. */
+		ret = -EWOULDBLOCK;
+		goto out;
+	}
+
+	/* Doing init or already dying? */
+	if (mod->state != MODULE_STATE_LIVE) {
+		/* FIXME: if (force), slam module count and wake up
+                   waiter --RR */
+		DEBUGP("%s already dying\n", mod->name);
+		ret = -EBUSY;
+		goto out;
+	}
+
+	/* If it has an init func, it must have an exit func to unload */
+	if ((mod->init != NULL && mod->exit == NULL)
+	    || mod->unsafe) {
+		forced = try_force(flags);
+		if (!forced) {
+			/* This module can't be removed */
+			ret = -EBUSY;
+			goto out;
+		}
+	}
+
+	/* Set this up before setting mod->state */
+	mod->waiter = current;
+
+	/* Stop the machine so refcounts can't move and disable module. */
+	ret = try_stop_module(mod, flags, &forced);
+	if (ret != 0)
+		goto out;
+
+	/* Never wait if forced. */
+	if (!forced && module_refcount(mod) != 0)
+		wait_for_zero_refcount(mod);
+
+	/* Final destruction now noone is using it. */
+	if (mod->exit != NULL) {
+		up(&module_mutex);
+		mod->exit();
+		down(&module_mutex);
+	}
+	free_module(mod);
+
+ out:
+	up(&module_mutex);
+	return ret;
+}
+
+static void print_unload_info(struct seq_file *m, struct module *mod)
+{
+	struct module_use *use;
+	int printed_something = 0;
+
+	seq_printf(m, " %u ", module_refcount(mod));
+
+	/* Always include a trailing , so userspace can differentiate
+           between this and the old multi-field proc format. */
+	list_for_each_entry(use, &mod->modules_which_use_me, list) {
+		printed_something = 1;
+		seq_printf(m, "%s,", use->module_which_uses->name);
+	}
+
+	if (mod->unsafe) {
+		printed_something = 1;
+		seq_printf(m, "[unsafe],");
+	}
+
+	if (mod->init != NULL && mod->exit == NULL) {
+		printed_something = 1;
+		seq_printf(m, "[permanent],");
+	}
+
+	if (!printed_something)
+		seq_printf(m, "-");
+}
+
+void __symbol_put(const char *symbol)
+{
+	struct module *owner;
+	unsigned long flags;
+	const unsigned long *crc;
+
+	spin_lock_irqsave(&modlist_lock, flags);
+	if (!__find_symbol(symbol, &owner, &crc, 1))
+		BUG();
+	module_put(owner);
+	spin_unlock_irqrestore(&modlist_lock, flags);
+}
+EXPORT_SYMBOL(__symbol_put);
+
+void symbol_put_addr(void *addr)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&modlist_lock, flags);
+	if (!kernel_text_address((unsigned long)addr))
+		BUG();
+
+	module_put(module_text_address((unsigned long)addr));
+	spin_unlock_irqrestore(&modlist_lock, flags);
+}
+EXPORT_SYMBOL_GPL(symbol_put_addr);
+
+static ssize_t show_refcnt(struct module_attribute *mattr,
+			   struct module *mod, char *buffer)
+{
+	/* sysfs holds a reference */
+	return sprintf(buffer, "%u\n", module_refcount(mod)-1);
+}
+
+static struct module_attribute refcnt = {
+	.attr = { .name = "refcnt", .mode = 0444, .owner = THIS_MODULE },
+	.show = show_refcnt,
+};
+
+#else /* !CONFIG_MODULE_UNLOAD */
+static void print_unload_info(struct seq_file *m, struct module *mod)
+{
+	/* We don't know the usage count, or what modules are using. */
+	seq_printf(m, " - -");
+}
+
+static inline void module_unload_free(struct module *mod)
+{
+}
+
+static inline int use_module(struct module *a, struct module *b)
+{
+	return strong_try_module_get(b);
+}
+
+static inline void module_unload_init(struct module *mod)
+{
+}
+#endif /* CONFIG_MODULE_UNLOAD */
+
+#ifdef CONFIG_OBSOLETE_MODPARM
+/* Bounds checking done below */
+static int obsparm_copy_string(const char *val, struct kernel_param *kp)
+{
+	strcpy(kp->arg, val);
+	return 0;
+}
+
+int set_obsolete(const char *val, struct kernel_param *kp)
+{
+	unsigned int min, max;
+	unsigned int size, maxsize;
+	int dummy;
+	char *endp;
+	const char *p;
+	struct obsolete_modparm *obsparm = kp->arg;
+
+	if (!val) {
+		printk(KERN_ERR "Parameter %s needs an argument\n", kp->name);
+		return -EINVAL;
+	}
+
+	/* type is: [min[-max]]{b,h,i,l,s} */
+	p = obsparm->type;
+	min = simple_strtol(p, &endp, 10);
+	if (endp == obsparm->type)
+		min = max = 1;
+	else if (*endp == '-') {
+		p = endp+1;
+		max = simple_strtol(p, &endp, 10);
+	} else
+		max = min;
+	switch (*endp) {
+	case 'b':
+		return param_array(kp->name, val, min, max, obsparm->addr,
+				   1, param_set_byte, &dummy);
+	case 'h':
+		return param_array(kp->name, val, min, max, obsparm->addr,
+				   sizeof(short), param_set_short, &dummy);
+	case 'i':
+		return param_array(kp->name, val, min, max, obsparm->addr,
+				   sizeof(int), param_set_int, &dummy);
+	case 'l':
+		return param_array(kp->name, val, min, max, obsparm->addr,
+				   sizeof(long), param_set_long, &dummy);
+	case 's':
+		return param_array(kp->name, val, min, max, obsparm->addr,
+				   sizeof(char *), param_set_charp, &dummy);
+
+	case 'c':
+		/* Undocumented: 1-5c50 means 1-5 strings of up to 49 chars,
+		   and the decl is "char xxx[5][50];" */
+		p = endp+1;
+		maxsize = simple_strtol(p, &endp, 10);
+		/* We check lengths here (yes, this is a hack). */
+		p = val;
+		while (p[size = strcspn(p, ",")]) {
+			if (size >= maxsize) 
+				goto oversize;
+			p += size+1;
+		}
+		if (size >= maxsize) 
+			goto oversize;
+		return param_array(kp->name, val, min, max, obsparm->addr,
+				   maxsize, obsparm_copy_string, &dummy);
+	}
+	printk(KERN_ERR "Unknown obsolete parameter type %s\n", obsparm->type);
+	return -EINVAL;
+ oversize:
+	printk(KERN_ERR
+	       "Parameter %s doesn't fit in %u chars.\n", kp->name, maxsize);
+	return -EINVAL;
+}
+
+static int obsolete_params(const char *name,
+			   char *args,
+			   struct obsolete_modparm obsparm[],
+			   unsigned int num,
+			   Elf_Shdr *sechdrs,
+			   unsigned int symindex,
+			   const char *strtab)
+{
+	struct kernel_param *kp;
+	unsigned int i;
+	int ret;
+
+	kp = kmalloc(sizeof(kp[0]) * num, GFP_KERNEL);
+	if (!kp)
+		return -ENOMEM;
+
+	for (i = 0; i < num; i++) {
+		char sym_name[128 + sizeof(MODULE_SYMBOL_PREFIX)];
+
+		snprintf(sym_name, sizeof(sym_name), "%s%s",
+			 MODULE_SYMBOL_PREFIX, obsparm[i].name);
+
+		kp[i].name = obsparm[i].name;
+		kp[i].perm = 000;
+		kp[i].set = set_obsolete;
+		kp[i].get = NULL;
+		obsparm[i].addr
+			= (void *)find_local_symbol(sechdrs, symindex, strtab,
+						    sym_name);
+		if (!obsparm[i].addr) {
+			printk("%s: falsely claims to have parameter %s\n",
+			       name, obsparm[i].name);
+			ret = -EINVAL;
+			goto out;
+		}
+		kp[i].arg = &obsparm[i];
+	}
+
+	ret = parse_args(name, args, kp, num, NULL);
+ out:
+	kfree(kp);
+	return ret;
+}
+#else
+static int obsolete_params(const char *name,
+			   char *args,
+			   struct obsolete_modparm obsparm[],
+			   unsigned int num,
+			   Elf_Shdr *sechdrs,
+			   unsigned int symindex,
+			   const char *strtab)
+{
+	if (num != 0)
+		printk(KERN_WARNING "%s: Ignoring obsolete parameters\n",
+		       name);
+	return 0;
+}
+#endif /* CONFIG_OBSOLETE_MODPARM */
+
+static const char vermagic[] = VERMAGIC_STRING;
+
+#ifdef CONFIG_MODVERSIONS
+static int check_version(Elf_Shdr *sechdrs,
+			 unsigned int versindex,
+			 const char *symname,
+			 struct module *mod, 
+			 const unsigned long *crc)
+{
+	unsigned int i, num_versions;
+	struct modversion_info *versions;
+
+	/* Exporting module didn't supply crcs?  OK, we're already tainted. */
+	if (!crc)
+		return 1;
+
+	versions = (void *) sechdrs[versindex].sh_addr;
+	num_versions = sechdrs[versindex].sh_size
+		/ sizeof(struct modversion_info);
+
+	for (i = 0; i < num_versions; i++) {
+		if (strcmp(versions[i].name, symname) != 0)
+			continue;
+
+		if (versions[i].crc == *crc)
+			return 1;
+		printk("%s: disagrees about version of symbol %s\n",
+		       mod->name, symname);
+		DEBUGP("Found checksum %lX vs module %lX\n",
+		       *crc, versions[i].crc);
+		return 0;
+	}
+	/* Not in module's version table.  OK, but that taints the kernel. */
+	if (!(tainted & TAINT_FORCED_MODULE)) {
+		printk("%s: no version for \"%s\" found: kernel tainted.\n",
+		       mod->name, symname);
+		tainted |= TAINT_FORCED_MODULE;
+	}
+	return 1;
+}
+
+static inline int check_modstruct_version(Elf_Shdr *sechdrs,
+					  unsigned int versindex,
+					  struct module *mod)
+{
+	const unsigned long *crc;
+	struct module *owner;
+
+	if (!__find_symbol("struct_module", &owner, &crc, 1))
+		BUG();
+	return check_version(sechdrs, versindex, "struct_module", mod,
+			     crc);
+}
+
+/* First part is kernel version, which we ignore. */
+static inline int same_magic(const char *amagic, const char *bmagic)
+{
+	amagic += strcspn(amagic, " ");
+	bmagic += strcspn(bmagic, " ");
+	return strcmp(amagic, bmagic) == 0;
+}
+#else
+static inline int check_version(Elf_Shdr *sechdrs,
+				unsigned int versindex,
+				const char *symname,
+				struct module *mod, 
+				const unsigned long *crc)
+{
+	return 1;
+}
+
+static inline int check_modstruct_version(Elf_Shdr *sechdrs,
+					  unsigned int versindex,
+					  struct module *mod)
+{
+	return 1;
+}
+
+static inline int same_magic(const char *amagic, const char *bmagic)
+{
+	return strcmp(amagic, bmagic) == 0;
+}
+#endif /* CONFIG_MODVERSIONS */
+
+/* Resolve a symbol for this module.  I.e. if we find one, record usage.
+   Must be holding module_mutex. */
+static unsigned long resolve_symbol(Elf_Shdr *sechdrs,
+				    unsigned int versindex,
+				    const char *name,
+				    struct module *mod)
+{
+	struct module *owner;
+	unsigned long ret;
+	const unsigned long *crc;
+
+	spin_lock_irq(&modlist_lock);
+	ret = __find_symbol(name, &owner, &crc, mod->license_gplok);
+	if (ret) {
+		/* use_module can fail due to OOM, or module unloading */
+		if (!check_version(sechdrs, versindex, name, mod, crc) ||
+		    !use_module(mod, owner))
+			ret = 0;
+	}
+	spin_unlock_irq(&modlist_lock);
+	return ret;
+}
+
+
+/*
+ * /sys/module/foo/sections stuff
+ * J. Corbet <corbet@lwn.net>
+ */
+#ifdef CONFIG_KALLSYMS
+static ssize_t module_sect_show(struct module_attribute *mattr,
+				struct module *mod, char *buf)
+{
+	struct module_sect_attr *sattr =
+		container_of(mattr, struct module_sect_attr, mattr);
+	return sprintf(buf, "0x%lx\n", sattr->address);
+}
+
+static void add_sect_attrs(struct module *mod, unsigned int nsect,
+		char *secstrings, Elf_Shdr *sechdrs)
+{
+	unsigned int nloaded = 0, i, size[2];
+	struct module_sect_attrs *sect_attrs;
+	struct module_sect_attr *sattr;
+	struct attribute **gattr;
+	
+	/* Count loaded sections and allocate structures */
+	for (i = 0; i < nsect; i++)
+		if (sechdrs[i].sh_flags & SHF_ALLOC)
+			nloaded++;
+	size[0] = ALIGN(sizeof(*sect_attrs)
+			+ nloaded * sizeof(sect_attrs->attrs[0]),
+			sizeof(sect_attrs->grp.attrs[0]));
+	size[1] = (nloaded + 1) * sizeof(sect_attrs->grp.attrs[0]);
+	if (! (sect_attrs = kmalloc(size[0] + size[1], GFP_KERNEL)))
+		return;
+
+	/* Setup section attributes. */
+	sect_attrs->grp.name = "sections";
+	sect_attrs->grp.attrs = (void *)sect_attrs + size[0];
+
+	sattr = &sect_attrs->attrs[0];
+	gattr = &sect_attrs->grp.attrs[0];
+	for (i = 0; i < nsect; i++) {
+		if (! (sechdrs[i].sh_flags & SHF_ALLOC))
+			continue;
+		sattr->address = sechdrs[i].sh_addr;
+		strlcpy(sattr->name, secstrings + sechdrs[i].sh_name,
+			MODULE_SECT_NAME_LEN);
+		sattr->mattr.show = module_sect_show;
+		sattr->mattr.store = NULL;
+		sattr->mattr.attr.name = sattr->name;
+		sattr->mattr.attr.owner = mod;
+		sattr->mattr.attr.mode = S_IRUGO;
+		*(gattr++) = &(sattr++)->mattr.attr;
+	}
+	*gattr = NULL;
+
+	if (sysfs_create_group(&mod->mkobj.kobj, &sect_attrs->grp))
+		goto out;
+
+	mod->sect_attrs = sect_attrs;
+	return;
+  out:
+	kfree(sect_attrs);
+}
+
+static void remove_sect_attrs(struct module *mod)
+{
+	if (mod->sect_attrs) {
+		sysfs_remove_group(&mod->mkobj.kobj,
+				   &mod->sect_attrs->grp);
+		/* We are positive that no one is using any sect attrs
+		 * at this point.  Deallocate immediately. */
+		kfree(mod->sect_attrs);
+		mod->sect_attrs = NULL;
+	}
+}
+
+
+#else
+static inline void add_sect_attrs(struct module *mod, unsigned int nsect,
+		char *sectstrings, Elf_Shdr *sechdrs)
+{
+}
+
+static inline void remove_sect_attrs(struct module *mod)
+{
+}
+#endif /* CONFIG_KALLSYMS */
+
+
+#ifdef CONFIG_MODULE_UNLOAD
+static inline int module_add_refcnt_attr(struct module *mod)
+{
+	return sysfs_create_file(&mod->mkobj.kobj, &refcnt.attr);
+}
+static void module_remove_refcnt_attr(struct module *mod)
+{
+	return sysfs_remove_file(&mod->mkobj.kobj, &refcnt.attr);
+}
+#else
+static inline int module_add_refcnt_attr(struct module *mod)
+{
+	return 0;
+}
+static void module_remove_refcnt_attr(struct module *mod)
+{
+}
+#endif
+
+
+static int mod_sysfs_setup(struct module *mod,
+			   struct kernel_param *kparam,
+			   unsigned int num_params)
+{
+	int err;
+
+	memset(&mod->mkobj.kobj, 0, sizeof(mod->mkobj.kobj));
+	err = kobject_set_name(&mod->mkobj.kobj, "%s", mod->name);
+	if (err)
+		goto out;
+	kobj_set_kset_s(&mod->mkobj, module_subsys);
+	mod->mkobj.mod = mod;
+	err = kobject_register(&mod->mkobj.kobj);
+	if (err)
+		goto out;
+
+	err = module_add_refcnt_attr(mod);
+	if (err)
+		goto out_unreg;
+
+	err = module_param_sysfs_setup(mod, kparam, num_params);
+	if (err)
+		goto out_unreg;
+
+	return 0;
+
+out_unreg:
+	kobject_unregister(&mod->mkobj.kobj);
+out:
+	return err;
+}
+
+static void mod_kobject_remove(struct module *mod)
+{
+	module_remove_refcnt_attr(mod);
+	module_param_sysfs_remove(mod);
+
+	kobject_unregister(&mod->mkobj.kobj);
+}
+
+/*
+ * unlink the module with the whole machine is stopped with interrupts off
+ * - this defends against kallsyms not taking locks
+ */
+static int __unlink_module(void *_mod)
+{
+	struct module *mod = _mod;
+	list_del(&mod->list);
+	return 0;
+}
+
+/* Free a module, remove from lists, etc (must hold module mutex). */
+static void free_module(struct module *mod)
+{
+	/* Delete from various lists */
+	stop_machine_run(__unlink_module, mod, NR_CPUS);
+	remove_sect_attrs(mod);
+	mod_kobject_remove(mod);
+
+	/* Arch-specific cleanup. */
+	module_arch_cleanup(mod);
+
+	/* Module unload stuff */
+	module_unload_free(mod);
+
+	/* This may be NULL, but that's OK */
+	module_free(mod, mod->module_init);
+	kfree(mod->args);
+	if (mod->percpu)
+		percpu_modfree(mod->percpu);
+
+	/* Finally, free the core (containing the module structure) */
+	module_free(mod, mod->module_core);
+}
+
+void *__symbol_get(const char *symbol)
+{
+	struct module *owner;
+	unsigned long value, flags;
+	const unsigned long *crc;
+
+	spin_lock_irqsave(&modlist_lock, flags);
+	value = __find_symbol(symbol, &owner, &crc, 1);
+	if (value && !strong_try_module_get(owner))
+		value = 0;
+	spin_unlock_irqrestore(&modlist_lock, flags);
+
+	return (void *)value;
+}
+EXPORT_SYMBOL_GPL(__symbol_get);
+
+/* Change all symbols so that sh_value encodes the pointer directly. */
+static int simplify_symbols(Elf_Shdr *sechdrs,
+			    unsigned int symindex,
+			    const char *strtab,
+			    unsigned int versindex,
+			    unsigned int pcpuindex,
+			    struct module *mod)
+{
+	Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr;
+	unsigned long secbase;
+	unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym);
+	int ret = 0;
+
+	for (i = 1; i < n; i++) {
+		switch (sym[i].st_shndx) {
+		case SHN_COMMON:
+			/* We compiled with -fno-common.  These are not
+			   supposed to happen.  */
+			DEBUGP("Common symbol: %s\n", strtab + sym[i].st_name);
+			printk("%s: please compile with -fno-common\n",
+			       mod->name);
+			ret = -ENOEXEC;
+			break;
+
+		case SHN_ABS:
+			/* Don't need to do anything */
+			DEBUGP("Absolute symbol: 0x%08lx\n",
+			       (long)sym[i].st_value);
+			break;
+
+		case SHN_UNDEF:
+			sym[i].st_value
+			  = resolve_symbol(sechdrs, versindex,
+					   strtab + sym[i].st_name, mod);
+
+			/* Ok if resolved.  */
+			if (sym[i].st_value != 0)
+				break;
+			/* Ok if weak.  */
+			if (ELF_ST_BIND(sym[i].st_info) == STB_WEAK)
+				break;
+
+			printk(KERN_WARNING "%s: Unknown symbol %s\n",
+			       mod->name, strtab + sym[i].st_name);
+			ret = -ENOENT;
+			break;
+
+		default:
+			/* Divert to percpu allocation if a percpu var. */
+			if (sym[i].st_shndx == pcpuindex)
+				secbase = (unsigned long)mod->percpu;
+			else
+				secbase = sechdrs[sym[i].st_shndx].sh_addr;
+			sym[i].st_value += secbase;
+			break;
+		}
+	}
+
+	return ret;
+}
+
+/* Update size with this section: return offset. */
+static long get_offset(unsigned long *size, Elf_Shdr *sechdr)
+{
+	long ret;
+
+	ret = ALIGN(*size, sechdr->sh_addralign ?: 1);
+	*size = ret + sechdr->sh_size;
+	return ret;
+}
+
+/* Lay out the SHF_ALLOC sections in a way not dissimilar to how ld
+   might -- code, read-only data, read-write data, small data.  Tally
+   sizes, and place the offsets into sh_entsize fields: high bit means it
+   belongs in init. */
+static void layout_sections(struct module *mod,
+			    const Elf_Ehdr *hdr,
+			    Elf_Shdr *sechdrs,
+			    const char *secstrings)
+{
+	static unsigned long const masks[][2] = {
+		/* NOTE: all executable code must be the first section
+		 * in this array; otherwise modify the text_size
+		 * finder in the two loops below */
+		{ SHF_EXECINSTR | SHF_ALLOC, ARCH_SHF_SMALL },
+		{ SHF_ALLOC, SHF_WRITE | ARCH_SHF_SMALL },
+		{ SHF_WRITE | SHF_ALLOC, ARCH_SHF_SMALL },
+		{ ARCH_SHF_SMALL | SHF_ALLOC, 0 }
+	};
+	unsigned int m, i;
+
+	for (i = 0; i < hdr->e_shnum; i++)
+		sechdrs[i].sh_entsize = ~0UL;
+
+	DEBUGP("Core section allocation order:\n");
+	for (m = 0; m < ARRAY_SIZE(masks); ++m) {
+		for (i = 0; i < hdr->e_shnum; ++i) {
+			Elf_Shdr *s = &sechdrs[i];
+
+			if ((s->sh_flags & masks[m][0]) != masks[m][0]
+			    || (s->sh_flags & masks[m][1])
+			    || s->sh_entsize != ~0UL
+			    || strncmp(secstrings + s->sh_name,
+				       ".init", 5) == 0)
+				continue;
+			s->sh_entsize = get_offset(&mod->core_size, s);
+			DEBUGP("\t%s\n", secstrings + s->sh_name);
+		}
+		if (m == 0)
+			mod->core_text_size = mod->core_size;
+	}
+
+	DEBUGP("Init section allocation order:\n");
+	for (m = 0; m < ARRAY_SIZE(masks); ++m) {
+		for (i = 0; i < hdr->e_shnum; ++i) {
+			Elf_Shdr *s = &sechdrs[i];
+
+			if ((s->sh_flags & masks[m][0]) != masks[m][0]
+			    || (s->sh_flags & masks[m][1])
+			    || s->sh_entsize != ~0UL
+			    || strncmp(secstrings + s->sh_name,
+				       ".init", 5) != 0)
+				continue;
+			s->sh_entsize = (get_offset(&mod->init_size, s)
+					 | INIT_OFFSET_MASK);
+			DEBUGP("\t%s\n", secstrings + s->sh_name);
+		}
+		if (m == 0)
+			mod->init_text_size = mod->init_size;
+	}
+}
+
+static inline int license_is_gpl_compatible(const char *license)
+{
+	return (strcmp(license, "GPL") == 0
+		|| strcmp(license, "GPL v2") == 0
+		|| strcmp(license, "GPL and additional rights") == 0
+		|| strcmp(license, "Dual BSD/GPL") == 0
+		|| strcmp(license, "Dual MPL/GPL") == 0);
+}
+
+static void set_license(struct module *mod, const char *license)
+{
+	if (!license)
+		license = "unspecified";
+
+	mod->license_gplok = license_is_gpl_compatible(license);
+	if (!mod->license_gplok && !(tainted & TAINT_PROPRIETARY_MODULE)) {
+		printk(KERN_WARNING "%s: module license '%s' taints kernel.\n",
+		       mod->name, license);
+		tainted |= TAINT_PROPRIETARY_MODULE;
+	}
+}
+
+/* Parse tag=value strings from .modinfo section */
+static char *next_string(char *string, unsigned long *secsize)
+{
+	/* Skip non-zero chars */
+	while (string[0]) {
+		string++;
+		if ((*secsize)-- <= 1)
+			return NULL;
+	}
+
+	/* Skip any zero padding. */
+	while (!string[0]) {
+		string++;
+		if ((*secsize)-- <= 1)
+			return NULL;
+	}
+	return string;
+}
+
+static char *get_modinfo(Elf_Shdr *sechdrs,
+			 unsigned int info,
+			 const char *tag)
+{
+	char *p;
+	unsigned int taglen = strlen(tag);
+	unsigned long size = sechdrs[info].sh_size;
+
+	for (p = (char *)sechdrs[info].sh_addr; p; p = next_string(p, &size)) {
+		if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=')
+			return p + taglen + 1;
+	}
+	return NULL;
+}
+
+#ifdef CONFIG_KALLSYMS
+int is_exported(const char *name, const struct module *mod)
+{
+	unsigned int i;
+
+	if (!mod) {
+		for (i = 0; __start___ksymtab+i < __stop___ksymtab; i++)
+			if (strcmp(__start___ksymtab[i].name, name) == 0)
+				return 1;
+		return 0;
+	}
+	for (i = 0; i < mod->num_syms; i++)
+		if (strcmp(mod->syms[i].name, name) == 0)
+			return 1;
+	return 0;
+}
+
+/* As per nm */
+static char elf_type(const Elf_Sym *sym,
+		     Elf_Shdr *sechdrs,
+		     const char *secstrings,
+		     struct module *mod)
+{
+	if (ELF_ST_BIND(sym->st_info) == STB_WEAK) {
+		if (ELF_ST_TYPE(sym->st_info) == STT_OBJECT)
+			return 'v';
+		else
+			return 'w';
+	}
+	if (sym->st_shndx == SHN_UNDEF)
+		return 'U';
+	if (sym->st_shndx == SHN_ABS)
+		return 'a';
+	if (sym->st_shndx >= SHN_LORESERVE)
+		return '?';
+	if (sechdrs[sym->st_shndx].sh_flags & SHF_EXECINSTR)
+		return 't';
+	if (sechdrs[sym->st_shndx].sh_flags & SHF_ALLOC
+	    && sechdrs[sym->st_shndx].sh_type != SHT_NOBITS) {
+		if (!(sechdrs[sym->st_shndx].sh_flags & SHF_WRITE))
+			return 'r';
+		else if (sechdrs[sym->st_shndx].sh_flags & ARCH_SHF_SMALL)
+			return 'g';
+		else
+			return 'd';
+	}
+	if (sechdrs[sym->st_shndx].sh_type == SHT_NOBITS) {
+		if (sechdrs[sym->st_shndx].sh_flags & ARCH_SHF_SMALL)
+			return 's';
+		else
+			return 'b';
+	}
+	if (strncmp(secstrings + sechdrs[sym->st_shndx].sh_name,
+		    ".debug", strlen(".debug")) == 0)
+		return 'n';
+	return '?';
+}
+
+static void add_kallsyms(struct module *mod,
+			 Elf_Shdr *sechdrs,
+			 unsigned int symindex,
+			 unsigned int strindex,
+			 const char *secstrings)
+{
+	unsigned int i;
+
+	mod->symtab = (void *)sechdrs[symindex].sh_addr;
+	mod->num_symtab = sechdrs[symindex].sh_size / sizeof(Elf_Sym);
+	mod->strtab = (void *)sechdrs[strindex].sh_addr;
+
+	/* Set types up while we still have access to sections. */
+	for (i = 0; i < mod->num_symtab; i++)
+		mod->symtab[i].st_info
+			= elf_type(&mod->symtab[i], sechdrs, secstrings, mod);
+}
+#else
+static inline void add_kallsyms(struct module *mod,
+				Elf_Shdr *sechdrs,
+				unsigned int symindex,
+				unsigned int strindex,
+				const char *secstrings)
+{
+}
+#endif /* CONFIG_KALLSYMS */
+
+/* Allocate and load the module: note that size of section 0 is always
+   zero, and we rely on this for optional sections. */
+static struct module *load_module(void __user *umod,
+				  unsigned long len,
+				  const char __user *uargs)
+{
+	Elf_Ehdr *hdr;
+	Elf_Shdr *sechdrs;
+	char *secstrings, *args, *modmagic, *strtab = NULL;
+	unsigned int i, symindex = 0, strindex = 0, setupindex, exindex,
+		exportindex, modindex, obsparmindex, infoindex, gplindex,
+		crcindex, gplcrcindex, versindex, pcpuindex;
+	long arglen;
+	struct module *mod;
+	long err = 0;
+	void *percpu = NULL, *ptr = NULL; /* Stops spurious gcc warning */
+	struct exception_table_entry *extable;
+
+	DEBUGP("load_module: umod=%p, len=%lu, uargs=%p\n",
+	       umod, len, uargs);
+	if (len < sizeof(*hdr))
+		return ERR_PTR(-ENOEXEC);
+
+	/* Suck in entire file: we'll want most of it. */
+	/* vmalloc barfs on "unusual" numbers.  Check here */
+	if (len > 64 * 1024 * 1024 || (hdr = vmalloc(len)) == NULL)
+		return ERR_PTR(-ENOMEM);
+	if (copy_from_user(hdr, umod, len) != 0) {
+		err = -EFAULT;
+		goto free_hdr;
+	}
+
+	/* Sanity checks against insmoding binaries or wrong arch,
+           weird elf version */
+	if (memcmp(hdr->e_ident, ELFMAG, 4) != 0
+	    || hdr->e_type != ET_REL
+	    || !elf_check_arch(hdr)
+	    || hdr->e_shentsize != sizeof(*sechdrs)) {
+		err = -ENOEXEC;
+		goto free_hdr;
+	}
+
+	if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr))
+		goto truncated;
+
+	/* Convenience variables */
+	sechdrs = (void *)hdr + hdr->e_shoff;
+	secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
+	sechdrs[0].sh_addr = 0;
+
+	for (i = 1; i < hdr->e_shnum; i++) {
+		if (sechdrs[i].sh_type != SHT_NOBITS
+		    && len < sechdrs[i].sh_offset + sechdrs[i].sh_size)
+			goto truncated;
+
+		/* Mark all sections sh_addr with their address in the
+		   temporary image. */
+		sechdrs[i].sh_addr = (size_t)hdr + sechdrs[i].sh_offset;
+
+		/* Internal symbols and strings. */
+		if (sechdrs[i].sh_type == SHT_SYMTAB) {
+			symindex = i;
+			strindex = sechdrs[i].sh_link;
+			strtab = (char *)hdr + sechdrs[strindex].sh_offset;
+		}
+#ifndef CONFIG_MODULE_UNLOAD
+		/* Don't load .exit sections */
+		if (strncmp(secstrings+sechdrs[i].sh_name, ".exit", 5) == 0)
+			sechdrs[i].sh_flags &= ~(unsigned long)SHF_ALLOC;
+#endif
+	}
+
+	modindex = find_sec(hdr, sechdrs, secstrings,
+			    ".gnu.linkonce.this_module");
+	if (!modindex) {
+		printk(KERN_WARNING "No module found in object\n");
+		err = -ENOEXEC;
+		goto free_hdr;
+	}
+	mod = (void *)sechdrs[modindex].sh_addr;
+
+	if (symindex == 0) {
+		printk(KERN_WARNING "%s: module has no symbols (stripped?)\n",
+		       mod->name);
+		err = -ENOEXEC;
+		goto free_hdr;
+	}
+
+	/* Optional sections */
+	exportindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab");
+	gplindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_gpl");
+	crcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab");
+	gplcrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_gpl");
+	setupindex = find_sec(hdr, sechdrs, secstrings, "__param");
+	exindex = find_sec(hdr, sechdrs, secstrings, "__ex_table");
+	obsparmindex = find_sec(hdr, sechdrs, secstrings, "__obsparm");
+	versindex = find_sec(hdr, sechdrs, secstrings, "__versions");
+	infoindex = find_sec(hdr, sechdrs, secstrings, ".modinfo");
+	pcpuindex = find_pcpusec(hdr, sechdrs, secstrings);
+
+	/* Don't keep modinfo section */
+	sechdrs[infoindex].sh_flags &= ~(unsigned long)SHF_ALLOC;
+#ifdef CONFIG_KALLSYMS
+	/* Keep symbol and string tables for decoding later. */
+	sechdrs[symindex].sh_flags |= SHF_ALLOC;
+	sechdrs[strindex].sh_flags |= SHF_ALLOC;
+#endif
+
+	/* Check module struct version now, before we try to use module. */
+	if (!check_modstruct_version(sechdrs, versindex, mod)) {
+		err = -ENOEXEC;
+		goto free_hdr;
+	}
+
+	modmagic = get_modinfo(sechdrs, infoindex, "vermagic");
+	/* This is allowed: modprobe --force will invalidate it. */
+	if (!modmagic) {
+		tainted |= TAINT_FORCED_MODULE;
+		printk(KERN_WARNING "%s: no version magic, tainting kernel.\n",
+		       mod->name);
+	} else if (!same_magic(modmagic, vermagic)) {
+		printk(KERN_ERR "%s: version magic '%s' should be '%s'\n",
+		       mod->name, modmagic, vermagic);
+		err = -ENOEXEC;
+		goto free_hdr;
+	}
+
+	/* Now copy in args */
+	arglen = strlen_user(uargs);
+	if (!arglen) {
+		err = -EFAULT;
+		goto free_hdr;
+	}
+	args = kmalloc(arglen, GFP_KERNEL);
+	if (!args) {
+		err = -ENOMEM;
+		goto free_hdr;
+	}
+	if (copy_from_user(args, uargs, arglen) != 0) {
+		err = -EFAULT;
+		goto free_mod;
+	}
+
+	if (find_module(mod->name)) {
+		err = -EEXIST;
+		goto free_mod;
+	}
+
+	mod->state = MODULE_STATE_COMING;
+
+	/* Allow arches to frob section contents and sizes.  */
+	err = module_frob_arch_sections(hdr, sechdrs, secstrings, mod);
+	if (err < 0)
+		goto free_mod;
+
+	if (pcpuindex) {
+		/* We have a special allocation for this section. */
+		percpu = percpu_modalloc(sechdrs[pcpuindex].sh_size,
+					 sechdrs[pcpuindex].sh_addralign);
+		if (!percpu) {
+			err = -ENOMEM;
+			goto free_mod;
+		}
+		sechdrs[pcpuindex].sh_flags &= ~(unsigned long)SHF_ALLOC;
+		mod->percpu = percpu;
+	}
+
+	/* Determine total sizes, and put offsets in sh_entsize.  For now
+	   this is done generically; there doesn't appear to be any
+	   special cases for the architectures. */
+	layout_sections(mod, hdr, sechdrs, secstrings);
+
+	/* Do the allocs. */
+	ptr = module_alloc(mod->core_size);
+	if (!ptr) {
+		err = -ENOMEM;
+		goto free_percpu;
+	}
+	memset(ptr, 0, mod->core_size);
+	mod->module_core = ptr;
+
+	ptr = module_alloc(mod->init_size);
+	if (!ptr && mod->init_size) {
+		err = -ENOMEM;
+		goto free_core;
+	}
+	memset(ptr, 0, mod->init_size);
+	mod->module_init = ptr;
+
+	/* Transfer each section which specifies SHF_ALLOC */
+	DEBUGP("final section addresses:\n");
+	for (i = 0; i < hdr->e_shnum; i++) {
+		void *dest;
+
+		if (!(sechdrs[i].sh_flags & SHF_ALLOC))
+			continue;
+
+		if (sechdrs[i].sh_entsize & INIT_OFFSET_MASK)
+			dest = mod->module_init
+				+ (sechdrs[i].sh_entsize & ~INIT_OFFSET_MASK);
+		else
+			dest = mod->module_core + sechdrs[i].sh_entsize;
+
+		if (sechdrs[i].sh_type != SHT_NOBITS)
+			memcpy(dest, (void *)sechdrs[i].sh_addr,
+			       sechdrs[i].sh_size);
+		/* Update sh_addr to point to copy in image. */
+		sechdrs[i].sh_addr = (unsigned long)dest;
+		DEBUGP("\t0x%lx %s\n", sechdrs[i].sh_addr, secstrings + sechdrs[i].sh_name);
+	}
+	/* Module has been moved. */
+	mod = (void *)sechdrs[modindex].sh_addr;
+
+	/* Now we've moved module, initialize linked lists, etc. */
+	module_unload_init(mod);
+
+	/* Set up license info based on the info section */
+	set_license(mod, get_modinfo(sechdrs, infoindex, "license"));
+
+	/* Fix up syms, so that st_value is a pointer to location. */
+	err = simplify_symbols(sechdrs, symindex, strtab, versindex, pcpuindex,
+			       mod);
+	if (err < 0)
+		goto cleanup;
+
+	/* Set up EXPORTed & EXPORT_GPLed symbols (section 0 is 0 length) */
+	mod->num_syms = sechdrs[exportindex].sh_size / sizeof(*mod->syms);
+	mod->syms = (void *)sechdrs[exportindex].sh_addr;
+	if (crcindex)
+		mod->crcs = (void *)sechdrs[crcindex].sh_addr;
+	mod->num_gpl_syms = sechdrs[gplindex].sh_size / sizeof(*mod->gpl_syms);
+	mod->gpl_syms = (void *)sechdrs[gplindex].sh_addr;
+	if (gplcrcindex)
+		mod->gpl_crcs = (void *)sechdrs[gplcrcindex].sh_addr;
+
+#ifdef CONFIG_MODVERSIONS
+	if ((mod->num_syms && !crcindex) || 
+	    (mod->num_gpl_syms && !gplcrcindex)) {
+		printk(KERN_WARNING "%s: No versions for exported symbols."
+		       " Tainting kernel.\n", mod->name);
+		tainted |= TAINT_FORCED_MODULE;
+	}
+#endif
+
+	/* Now do relocations. */
+	for (i = 1; i < hdr->e_shnum; i++) {
+		const char *strtab = (char *)sechdrs[strindex].sh_addr;
+		unsigned int info = sechdrs[i].sh_info;
+
+		/* Not a valid relocation section? */
+		if (info >= hdr->e_shnum)
+			continue;
+
+		/* Don't bother with non-allocated sections */
+		if (!(sechdrs[info].sh_flags & SHF_ALLOC))
+			continue;
+
+		if (sechdrs[i].sh_type == SHT_REL)
+			err = apply_relocate(sechdrs, strtab, symindex, i,mod);
+		else if (sechdrs[i].sh_type == SHT_RELA)
+			err = apply_relocate_add(sechdrs, strtab, symindex, i,
+						 mod);
+		if (err < 0)
+			goto cleanup;
+	}
+
+  	/* Set up and sort exception table */
+	mod->num_exentries = sechdrs[exindex].sh_size / sizeof(*mod->extable);
+	mod->extable = extable = (void *)sechdrs[exindex].sh_addr;
+	sort_extable(extable, extable + mod->num_exentries);
+
+	/* Finally, copy percpu area over. */
+	percpu_modcopy(mod->percpu, (void *)sechdrs[pcpuindex].sh_addr,
+		       sechdrs[pcpuindex].sh_size);
+
+	add_kallsyms(mod, sechdrs, symindex, strindex, secstrings);
+
+	err = module_finalize(hdr, sechdrs, mod);
+	if (err < 0)
+		goto cleanup;
+
+	mod->args = args;
+	if (obsparmindex) {
+		err = obsolete_params(mod->name, mod->args,
+				      (struct obsolete_modparm *)
+				      sechdrs[obsparmindex].sh_addr,
+				      sechdrs[obsparmindex].sh_size
+				      / sizeof(struct obsolete_modparm),
+				      sechdrs, symindex,
+				      (char *)sechdrs[strindex].sh_addr);
+		if (setupindex)
+			printk(KERN_WARNING "%s: Ignoring new-style "
+			       "parameters in presence of obsolete ones\n",
+			       mod->name);
+	} else {
+		/* Size of section 0 is 0, so this works well if no params */
+		err = parse_args(mod->name, mod->args,
+				 (struct kernel_param *)
+				 sechdrs[setupindex].sh_addr,
+				 sechdrs[setupindex].sh_size
+				 / sizeof(struct kernel_param),
+				 NULL);
+	}
+	if (err < 0)
+		goto arch_cleanup;
+
+	err = mod_sysfs_setup(mod, 
+			      (struct kernel_param *)
+			      sechdrs[setupindex].sh_addr,
+			      sechdrs[setupindex].sh_size
+			      / sizeof(struct kernel_param));
+	if (err < 0)
+		goto arch_cleanup;
+	add_sect_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
+
+	/* Get rid of temporary copy */
+	vfree(hdr);
+
+	/* Done! */
+	return mod;
+
+ arch_cleanup:
+	module_arch_cleanup(mod);
+ cleanup:
+	module_unload_free(mod);
+	module_free(mod, mod->module_init);
+ free_core:
+	module_free(mod, mod->module_core);
+ free_percpu:
+	if (percpu)
+		percpu_modfree(percpu);
+ free_mod:
+	kfree(args);
+ free_hdr:
+	vfree(hdr);
+	if (err < 0) return ERR_PTR(err);
+	else return ptr;
+
+ truncated:
+	printk(KERN_ERR "Module len %lu truncated\n", len);
+	err = -ENOEXEC;
+	goto free_hdr;
+}
+
+/*
+ * link the module with the whole machine is stopped with interrupts off
+ * - this defends against kallsyms not taking locks
+ */
+static int __link_module(void *_mod)
+{
+	struct module *mod = _mod;
+	list_add(&mod->list, &modules);
+	return 0;
+}
+
+/* This is where the real work happens */
+asmlinkage long
+sys_init_module(void __user *umod,
+		unsigned long len,
+		const char __user *uargs)
+{
+	struct module *mod;
+	int ret = 0;
+
+	/* Must have permission */
+	if (!capable(CAP_SYS_MODULE))
+		return -EPERM;
+
+	/* Only one module load at a time, please */
+	if (down_interruptible(&module_mutex) != 0)
+		return -EINTR;
+
+	/* Do all the hard work */
+	mod = load_module(umod, len, uargs);
+	if (IS_ERR(mod)) {
+		up(&module_mutex);
+		return PTR_ERR(mod);
+	}
+
+	/* Flush the instruction cache, since we've played with text */
+	if (mod->module_init)
+		flush_icache_range((unsigned long)mod->module_init,
+				   (unsigned long)mod->module_init
+				   + mod->init_size);
+	flush_icache_range((unsigned long)mod->module_core,
+			   (unsigned long)mod->module_core + mod->core_size);
+
+	/* Now sew it into the lists.  They won't access us, since
+           strong_try_module_get() will fail. */
+	stop_machine_run(__link_module, mod, NR_CPUS);
+
+	/* Drop lock so they can recurse */
+	up(&module_mutex);
+
+	down(&notify_mutex);
+	notifier_call_chain(&module_notify_list, MODULE_STATE_COMING, mod);
+	up(&notify_mutex);
+
+	/* Start the module */
+	if (mod->init != NULL)
+		ret = mod->init();
+	if (ret < 0) {
+		/* Init routine failed: abort.  Try to protect us from
+                   buggy refcounters. */
+		mod->state = MODULE_STATE_GOING;
+		synchronize_kernel();
+		if (mod->unsafe)
+			printk(KERN_ERR "%s: module is now stuck!\n",
+			       mod->name);
+		else {
+			module_put(mod);
+			down(&module_mutex);
+			free_module(mod);
+			up(&module_mutex);
+		}
+		return ret;
+	}
+
+	/* Now it's a first class citizen! */
+	down(&module_mutex);
+	mod->state = MODULE_STATE_LIVE;
+	/* Drop initial reference. */
+	module_put(mod);
+	module_free(mod, mod->module_init);
+	mod->module_init = NULL;
+	mod->init_size = 0;
+	mod->init_text_size = 0;
+	up(&module_mutex);
+
+	return 0;
+}
+
+static inline int within(unsigned long addr, void *start, unsigned long size)
+{
+	return ((void *)addr >= start && (void *)addr < start + size);
+}
+
+#ifdef CONFIG_KALLSYMS
+/*
+ * This ignores the intensely annoying "mapping symbols" found
+ * in ARM ELF files: $a, $t and $d.
+ */
+static inline int is_arm_mapping_symbol(const char *str)
+{
+	return str[0] == '$' && strchr("atd", str[1]) 
+	       && (str[2] == '\0' || str[2] == '.');
+}
+
+static const char *get_ksymbol(struct module *mod,
+			       unsigned long addr,
+			       unsigned long *size,
+			       unsigned long *offset)
+{
+	unsigned int i, best = 0;
+	unsigned long nextval;
+
+	/* At worse, next value is at end of module */
+	if (within(addr, mod->module_init, mod->init_size))
+		nextval = (unsigned long)mod->module_init+mod->init_text_size;
+	else 
+		nextval = (unsigned long)mod->module_core+mod->core_text_size;
+
+	/* Scan for closest preceeding symbol, and next symbol. (ELF
+           starts real symbols at 1). */
+	for (i = 1; i < mod->num_symtab; i++) {
+		if (mod->symtab[i].st_shndx == SHN_UNDEF)
+			continue;
+
+		/* We ignore unnamed symbols: they're uninformative
+		 * and inserted at a whim. */
+		if (mod->symtab[i].st_value <= addr
+		    && mod->symtab[i].st_value > mod->symtab[best].st_value
+		    && *(mod->strtab + mod->symtab[i].st_name) != '\0'
+		    && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name))
+			best = i;
+		if (mod->symtab[i].st_value > addr
+		    && mod->symtab[i].st_value < nextval
+		    && *(mod->strtab + mod->symtab[i].st_name) != '\0'
+		    && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name))
+			nextval = mod->symtab[i].st_value;
+	}
+
+	if (!best)
+		return NULL;
+
+	*size = nextval - mod->symtab[best].st_value;
+	*offset = addr - mod->symtab[best].st_value;
+	return mod->strtab + mod->symtab[best].st_name;
+}
+
+/* For kallsyms to ask for address resolution.  NULL means not found.
+   We don't lock, as this is used for oops resolution and races are a
+   lesser concern. */
+const char *module_address_lookup(unsigned long addr,
+				  unsigned long *size,
+				  unsigned long *offset,
+				  char **modname)
+{
+	struct module *mod;
+
+	list_for_each_entry(mod, &modules, list) {
+		if (within(addr, mod->module_init, mod->init_size)
+		    || within(addr, mod->module_core, mod->core_size)) {
+			*modname = mod->name;
+			return get_ksymbol(mod, addr, size, offset);
+		}
+	}
+	return NULL;
+}
+
+struct module *module_get_kallsym(unsigned int symnum,
+				  unsigned long *value,
+				  char *type,
+				  char namebuf[128])
+{
+	struct module *mod;
+
+	down(&module_mutex);
+	list_for_each_entry(mod, &modules, list) {
+		if (symnum < mod->num_symtab) {
+			*value = mod->symtab[symnum].st_value;
+			*type = mod->symtab[symnum].st_info;
+			strncpy(namebuf,
+				mod->strtab + mod->symtab[symnum].st_name,
+				127);
+			up(&module_mutex);
+			return mod;
+		}
+		symnum -= mod->num_symtab;
+	}
+	up(&module_mutex);
+	return NULL;
+}
+
+static unsigned long mod_find_symname(struct module *mod, const char *name)
+{
+	unsigned int i;
+
+	for (i = 0; i < mod->num_symtab; i++)
+		if (strcmp(name, mod->strtab+mod->symtab[i].st_name) == 0)
+			return mod->symtab[i].st_value;
+	return 0;
+}
+
+/* Look for this name: can be of form module:name. */
+unsigned long module_kallsyms_lookup_name(const char *name)
+{
+	struct module *mod;
+	char *colon;
+	unsigned long ret = 0;
+
+	/* Don't lock: we're in enough trouble already. */
+	if ((colon = strchr(name, ':')) != NULL) {
+		*colon = '\0';
+		if ((mod = find_module(name)) != NULL)
+			ret = mod_find_symname(mod, colon+1);
+		*colon = ':';
+	} else {
+		list_for_each_entry(mod, &modules, list)
+			if ((ret = mod_find_symname(mod, name)) != 0)
+				break;
+	}
+	return ret;
+}
+#endif /* CONFIG_KALLSYMS */
+
+/* Called by the /proc file system to return a list of modules. */
+static void *m_start(struct seq_file *m, loff_t *pos)
+{
+	struct list_head *i;
+	loff_t n = 0;
+
+	down(&module_mutex);
+	list_for_each(i, &modules) {
+		if (n++ == *pos)
+			break;
+	}
+	if (i == &modules)
+		return NULL;
+	return i;
+}
+
+static void *m_next(struct seq_file *m, void *p, loff_t *pos)
+{
+	struct list_head *i = p;
+	(*pos)++;
+	if (i->next == &modules)
+		return NULL;
+	return i->next;
+}
+
+static void m_stop(struct seq_file *m, void *p)
+{
+	up(&module_mutex);
+}
+
+static int m_show(struct seq_file *m, void *p)
+{
+	struct module *mod = list_entry(p, struct module, list);
+	seq_printf(m, "%s %lu",
+		   mod->name, mod->init_size + mod->core_size);
+	print_unload_info(m, mod);
+
+	/* Informative for users. */
+	seq_printf(m, " %s",
+		   mod->state == MODULE_STATE_GOING ? "Unloading":
+		   mod->state == MODULE_STATE_COMING ? "Loading":
+		   "Live");
+	/* Used by oprofile and other similar tools. */
+	seq_printf(m, " 0x%p", mod->module_core);
+
+	seq_printf(m, "\n");
+	return 0;
+}
+
+/* Format: modulename size refcount deps address
+
+   Where refcount is a number or -, and deps is a comma-separated list
+   of depends or -.
+*/
+struct seq_operations modules_op = {
+	.start	= m_start,
+	.next	= m_next,
+	.stop	= m_stop,
+	.show	= m_show
+};
+
+/* Given an address, look for it in the module exception tables. */
+const struct exception_table_entry *search_module_extables(unsigned long addr)
+{
+	unsigned long flags;
+	const struct exception_table_entry *e = NULL;
+	struct module *mod;
+
+	spin_lock_irqsave(&modlist_lock, flags);
+	list_for_each_entry(mod, &modules, list) {
+		if (mod->num_exentries == 0)
+			continue;
+				
+		e = search_extable(mod->extable,
+				   mod->extable + mod->num_exentries - 1,
+				   addr);
+		if (e)
+			break;
+	}
+	spin_unlock_irqrestore(&modlist_lock, flags);
+
+	/* Now, if we found one, we are running inside it now, hence
+           we cannot unload the module, hence no refcnt needed. */
+	return e;
+}
+
+/* Is this a valid kernel address?  We don't grab the lock: we are oopsing. */
+struct module *__module_text_address(unsigned long addr)
+{
+	struct module *mod;
+
+	list_for_each_entry(mod, &modules, list)
+		if (within(addr, mod->module_init, mod->init_text_size)
+		    || within(addr, mod->module_core, mod->core_text_size))
+			return mod;
+	return NULL;
+}
+
+struct module *module_text_address(unsigned long addr)
+{
+	struct module *mod;
+	unsigned long flags;
+
+	spin_lock_irqsave(&modlist_lock, flags);
+	mod = __module_text_address(addr);
+	spin_unlock_irqrestore(&modlist_lock, flags);
+
+	return mod;
+}
+
+/* Don't grab lock, we're oopsing. */
+void print_modules(void)
+{
+	struct module *mod;
+
+	printk("Modules linked in:");
+	list_for_each_entry(mod, &modules, list)
+		printk(" %s", mod->name);
+	printk("\n");
+}
+
+void module_add_driver(struct module *mod, struct device_driver *drv)
+{
+	if (!mod || !drv)
+		return;
+
+	/* Don't check return code; this call is idempotent */
+	sysfs_create_link(&drv->kobj, &mod->mkobj.kobj, "module");
+}
+EXPORT_SYMBOL(module_add_driver);
+
+void module_remove_driver(struct device_driver *drv)
+{
+	if (!drv)
+		return;
+	sysfs_remove_link(&drv->kobj, "module");
+}
+EXPORT_SYMBOL(module_remove_driver);
+
+#ifdef CONFIG_MODVERSIONS
+/* Generate the signature for struct module here, too, for modversions. */
+void struct_module(struct module *mod) { return; }
+EXPORT_SYMBOL(struct_module);
+#endif