-/* Rewritten by Rusty Russell, on the backs of many others...
+/*
Copyright (C) 2002 Richard Henderson
Copyright (C) 2001 Rusty Russell, 2002 Rusty Russell IBM.
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/kallsyms.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/err.h>
#include <linux/vermagic.h>
#include <linux/notifier.h>
+#include <linux/sched.h>
#include <linux/stop_machine.h>
#include <linux/device.h>
#include <linux/string.h>
-#include <linux/sched.h>
#include <linux/mutex.h>
+#include <linux/unwind.h>
#include <asm/uaccess.h>
#include <asm/semaphore.h>
#include <asm/cacheflush.h>
+#include <linux/license.h>
+
+extern int module_sysfs_initialized;
#if 0
#define DEBUGP printk
/* 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 */
+/* List of modules, protected by module_mutex or preempt_disable
+ * (add/delete uses stop_machine). */
static DEFINE_MUTEX(module_mutex);
static LIST_HEAD(modules);
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.
+static inline void add_taint_module(struct module *mod, unsigned flag)
+{
+ add_taint(flag);
+ mod->taints |= flag;
+}
+
+/*
+ * A thread that wants to hold a reference to a module only while it
+ * is running can call this to safely exit. nfsd and lockd use this.
*/
void __module_put_and_exit(struct module *mod, long code)
{
extern const struct kernel_symbol __stop___ksymtab_gpl[];
extern const struct kernel_symbol __start___ksymtab_gpl_future[];
extern const struct kernel_symbol __stop___ksymtab_gpl_future[];
+extern const struct kernel_symbol __start___ksymtab_unused[];
+extern const struct kernel_symbol __stop___ksymtab_unused[];
+extern const struct kernel_symbol __start___ksymtab_unused_gpl[];
+extern const struct kernel_symbol __stop___ksymtab_unused_gpl[];
+extern const struct kernel_symbol __start___ksymtab_gpl_future[];
+extern const struct kernel_symbol __stop___ksymtab_gpl_future[];
extern const unsigned long __start___kcrctab[];
extern const unsigned long __start___kcrctab_gpl[];
extern const unsigned long __start___kcrctab_gpl_future[];
+extern const unsigned long __start___kcrctab_unused[];
+extern const unsigned long __start___kcrctab_unused_gpl[];
#ifndef CONFIG_MODVERSIONS
#define symversion(base, idx) NULL
return NULL;
}
+static void printk_unused_warning(const char *name)
+{
+ printk(KERN_WARNING "Symbol %s is marked as UNUSED, "
+ "however this module is using it.\n", name);
+ printk(KERN_WARNING "This symbol will go away in the future.\n");
+ printk(KERN_WARNING "Please evalute if this is the right api to use, "
+ "and if it really is, submit a report the linux kernel "
+ "mailinglist together with submitting your code for "
+ "inclusion.\n");
+}
+
/* Find a symbol, return value, crc and module which owns it */
static unsigned long __find_symbol(const char *name,
struct module **owner,
return ks->value;
}
+ ks = lookup_symbol(name, __start___ksymtab_unused,
+ __stop___ksymtab_unused);
+ if (ks) {
+ printk_unused_warning(name);
+ *crc = symversion(__start___kcrctab_unused,
+ (ks - __start___ksymtab_unused));
+ return ks->value;
+ }
+
+ if (gplok)
+ ks = lookup_symbol(name, __start___ksymtab_unused_gpl,
+ __stop___ksymtab_unused_gpl);
+ if (ks) {
+ printk_unused_warning(name);
+ *crc = symversion(__start___kcrctab_unused_gpl,
+ (ks - __start___ksymtab_unused_gpl));
+ return ks->value;
+ }
+
/* Now try modules. */
list_for_each_entry(mod, &modules, list) {
*owner = mod;
return ks->value;
}
}
+ ks = lookup_symbol(name, mod->unused_syms, mod->unused_syms + mod->num_unused_syms);
+ if (ks) {
+ printk_unused_warning(name);
+ *crc = symversion(mod->unused_crcs, (ks - mod->unused_syms));
+ return ks->value;
+ }
+
+ if (gplok) {
+ ks = lookup_symbol(name, mod->unused_gpl_syms,
+ mod->unused_gpl_syms + mod->num_unused_gpl_syms);
+ if (ks) {
+ printk_unused_warning(name);
+ *crc = symversion(mod->unused_gpl_crcs,
+ (ks - mod->unused_gpl_syms));
+ return ks->value;
+ }
+ }
ks = lookup_symbol(name, mod->gpl_future_syms,
(mod->gpl_future_syms +
mod->num_gpl_future_syms));
{
/* Reallocation required? */
if (pcpu_num_used + 1 > pcpu_num_allocated) {
- int *new = kmalloc(sizeof(new[0]) * pcpu_num_allocated*2,
- GFP_KERNEL);
+ int *new;
+
+ new = krealloc(pcpu_size, 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;
}
unsigned int i;
void *ptr;
- if (align > SMP_CACHE_BYTES) {
- printk(KERN_WARNING "%s: per-cpu alignment %li > %i\n",
- name, align, SMP_CACHE_BYTES);
- align = SMP_CACHE_BYTES;
+ if (align > PAGE_SIZE) {
+ printk(KERN_WARNING "%s: per-cpu alignment %li > %li\n",
+ name, align, PAGE_SIZE);
+ align = PAGE_SIZE;
}
ptr = __per_cpu_start;
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);
+ pcpu_size[0] = -(__per_cpu_end-__per_cpu_start);
/* Free room. */
pcpu_size[1] = PERCPU_ENOUGH_ROOM + pcpu_size[0];
if (pcpu_size[1] < 0) {
mod->field = NULL; \
} \
static struct module_attribute modinfo_##field = { \
- .attr = { .name = __stringify(field), .mode = 0444, \
- .owner = THIS_MODULE }, \
+ .attr = { .name = __stringify(field), .mode = 0444 }, \
.show = show_modinfo_##field, \
.setup = setup_modinfo_##field, \
.test = modinfo_##field##_exists, \
static int use_module(struct module *a, struct module *b)
{
struct module_use *use;
+ int no_warn;
+
if (b == NULL || already_uses(a, b)) return 1;
if (!strong_try_module_get(b))
use->module_which_uses = a;
list_add(&use->list, &b->modules_which_use_me);
+ no_warn = sysfs_create_link(b->holders_dir, &a->mkobj.kobj, a->name);
return 1;
}
module_put(i);
list_del(&use->list);
kfree(use);
+ sysfs_remove_link(i->holders_dir, mod->name);
/* There can be at most one match. */
break;
}
void __symbol_put(const char *symbol)
{
struct module *owner;
- unsigned long flags;
const unsigned long *crc;
- spin_lock_irqsave(&modlist_lock, flags);
+ preempt_disable();
if (!__find_symbol(symbol, &owner, &crc, 1))
BUG();
module_put(owner);
- spin_unlock_irqrestore(&modlist_lock, flags);
+ preempt_enable();
}
EXPORT_SYMBOL(__symbol_put);
}
static struct module_attribute refcnt = {
- .attr = { .name = "refcnt", .mode = 0444, .owner = THIS_MODULE },
+ .attr = { .name = "refcnt", .mode = 0444 },
.show = show_refcnt,
};
+void module_put(struct module *module)
+{
+ if (module) {
+ unsigned int cpu = get_cpu();
+ local_dec(&module->ref[cpu].count);
+ /* Maybe they're waiting for us to drop reference? */
+ if (unlikely(!module_is_live(module)))
+ wake_up_process(module->waiter);
+ put_cpu();
+ }
+}
+EXPORT_SYMBOL(module_put);
+
#else /* !CONFIG_MODULE_UNLOAD */
static void print_unload_info(struct seq_file *m, struct module *mod)
{
}
#endif /* CONFIG_MODULE_UNLOAD */
+static ssize_t show_initstate(struct module_attribute *mattr,
+ struct module *mod, char *buffer)
+{
+ const char *state = "unknown";
+
+ switch (mod->state) {
+ case MODULE_STATE_LIVE:
+ state = "live";
+ break;
+ case MODULE_STATE_COMING:
+ state = "coming";
+ break;
+ case MODULE_STATE_GOING:
+ state = "going";
+ break;
+ }
+ return sprintf(buffer, "%s\n", state);
+}
+
+static struct module_attribute initstate = {
+ .attr = { .name = "initstate", .mode = 0444 },
+ .show = show_initstate,
+};
+
static struct module_attribute *modinfo_attrs[] = {
&modinfo_version,
&modinfo_srcversion,
+ &initstate,
#ifdef CONFIG_MODULE_UNLOAD
&refcnt,
#endif
return 0;
}
/* Not in module's version table. OK, but that taints the kernel. */
- if (!(tainted & TAINT_FORCED_MODULE)) {
+ if (!(tainted & TAINT_FORCED_MODULE))
printk("%s: no version for \"%s\" found: kernel tainted.\n",
mod->name, symname);
- add_taint(TAINT_FORCED_MODULE);
- }
+ add_taint_module(mod, TAINT_FORCED_MODULE);
return 1;
}
unsigned long ret;
const unsigned long *crc;
- ret = __find_symbol(name, &owner, &crc, mod->license_gplok);
+ ret = __find_symbol(name, &owner, &crc,
+ !(mod->taints & TAINT_PROPRIETARY_MODULE));
if (ret) {
/* use_module can fail due to OOM, or module unloading */
if (!check_version(sechdrs, versindex, name, mod, crc) ||
return sprintf(buf, "0x%lx\n", sattr->address);
}
+static void free_sect_attrs(struct module_sect_attrs *sect_attrs)
+{
+ int section;
+
+ for (section = 0; section < sect_attrs->nsections; section++)
+ kfree(sect_attrs->attrs[section].name);
+ kfree(sect_attrs);
+}
+
static void add_sect_attrs(struct module *mod, unsigned int nsect,
char *secstrings, Elf_Shdr *sechdrs)
{
+ 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)))
+ sect_attrs = kzalloc(size[0] + size[1], GFP_KERNEL);
+ if (sect_attrs == NULL)
return;
/* Setup section attributes. */
sect_attrs->grp.name = "sections";
sect_attrs->grp.attrs = (void *)sect_attrs + size[0];
+ sect_attrs->nsections = 0;
sattr = §_attrs->attrs[0];
gattr = §_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->name = kstrdup(secstrings + sechdrs[i].sh_name,
+ GFP_KERNEL);
+ if (sattr->name == NULL)
+ goto out;
+ sect_attrs->nsections++;
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;
}
mod->sect_attrs = sect_attrs;
return;
out:
- kfree(sect_attrs);
+ free_sect_attrs(sect_attrs);
}
static void remove_sect_attrs(struct module *mod)
&mod->sect_attrs->grp);
/* We are positive that no one is using any sect attrs
* at this point. Deallocate immediately. */
- kfree(mod->sect_attrs);
+ free_sect_attrs(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)
{
}
#endif /* CONFIG_KALLSYMS */
-static int module_add_modinfo_attrs(struct module *mod)
+#ifdef CONFIG_SYSFS
+int module_add_modinfo_attrs(struct module *mod)
{
struct module_attribute *attr;
struct module_attribute *temp_attr;
if (!attr->test ||
(attr->test && attr->test(mod))) {
memcpy(temp_attr, attr, sizeof(*temp_attr));
- temp_attr->attr.owner = mod;
error = sysfs_create_file(&mod->mkobj.kobj,&temp_attr->attr);
++temp_attr;
}
return error;
}
-static void module_remove_modinfo_attrs(struct module *mod)
+void module_remove_modinfo_attrs(struct module *mod)
{
struct module_attribute *attr;
int i;
}
kfree(mod->modinfo_attrs);
}
+#endif
-static int mod_sysfs_setup(struct module *mod,
- struct kernel_param *kparam,
- unsigned int num_params)
+#ifdef CONFIG_SYSFS
+int mod_sysfs_init(struct module *mod)
{
int err;
+ if (!module_sysfs_initialized) {
+ printk(KERN_ERR "%s: module sysfs not initialized\n",
+ mod->name);
+ err = -EINVAL;
+ goto out;
+ }
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);
+
+ kobject_init(&mod->mkobj.kobj);
+
+out:
+ return err;
+}
+
+int mod_sysfs_setup(struct module *mod,
+ struct kernel_param *kparam,
+ unsigned int num_params)
+{
+ int err;
+
+ /* delay uevent until full sysfs population */
+ err = kobject_add(&mod->mkobj.kobj);
if (err)
goto out;
+ mod->holders_dir = kobject_add_dir(&mod->mkobj.kobj, "holders");
+ if (!mod->holders_dir) {
+ err = -ENOMEM;
+ goto out_unreg;
+ }
+
err = module_param_sysfs_setup(mod, kparam, num_params);
if (err)
- goto out_unreg;
+ goto out_unreg_holders;
err = module_add_modinfo_attrs(mod);
if (err)
- goto out_unreg;
+ goto out_unreg_param;
+ kobject_uevent(&mod->mkobj.kobj, KOBJ_ADD);
return 0;
+out_unreg_param:
+ module_param_sysfs_remove(mod);
+out_unreg_holders:
+ kobject_unregister(mod->holders_dir);
out_unreg:
- kobject_unregister(&mod->mkobj.kobj);
+ kobject_del(&mod->mkobj.kobj);
+ kobject_put(&mod->mkobj.kobj);
out:
return err;
}
+#endif
static void mod_kobject_remove(struct module *mod)
{
module_remove_modinfo_attrs(mod);
module_param_sysfs_remove(mod);
-
+ kobject_unregister(mod->mkobj.drivers_dir);
+ kobject_unregister(mod->holders_dir);
kobject_unregister(&mod->mkobj.kobj);
}
return 0;
}
-/* Free a module, remove from lists, etc (must hold module mutex). */
+/* Free a module, remove from lists, etc (must hold module_mutex). */
static void free_module(struct module *mod)
{
/* Delete from various lists */
remove_sect_attrs(mod);
mod_kobject_remove(mod);
+ unwind_remove_table(mod->unwind_info, 0);
+
/* Arch-specific cleanup. */
module_arch_cleanup(mod);
if (mod->percpu)
percpu_modfree(mod->percpu);
+ /* Free lock-classes: */
+ lockdep_free_key_range(mod->module_core, mod->core_size);
+
/* 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;
+ unsigned long value;
const unsigned long *crc;
- spin_lock_irqsave(&modlist_lock, flags);
+ preempt_disable();
value = __find_symbol(symbol, &owner, &crc, 1);
if (value && !strong_try_module_get(owner))
value = 0;
- spin_unlock_irqrestore(&modlist_lock, flags);
+ preempt_enable();
return (void *)value;
}
/*
* Ensure that an exported symbol [global namespace] does not already exist
- * in the Kernel or in some other modules exported symbol table.
+ * in the kernel or in some other module's exported symbol table.
*/
static int verify_export_symbols(struct module *mod)
{
}
}
-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 MIT/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);
- add_taint(TAINT_PROPRIETARY_MODULE);
+ if (!license_is_gpl_compatible(license)) {
+ if (!(tainted & TAINT_PROPRIETARY_MODULE))
+ printk(KERN_WARNING "%s: module license '%s' taints "
+ "kernel.\n", mod->name, license);
+ add_taint_module(mod, TAINT_PROPRIETARY_MODULE);
}
}
}
#ifdef CONFIG_KALLSYMS
-int is_exported(const char *name, const struct module *mod)
+static int is_exported(const char *name, const struct module *mod)
{
if (!mod && lookup_symbol(name, __start___ksymtab, __stop___ksymtab))
return 1;
else
- if (lookup_symbol(name, mod->syms, mod->syms + mod->num_syms))
+ if (mod && lookup_symbol(name, mod->syms, mod->syms + mod->num_syms))
return 1;
else
return 0;
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, gplfutureindex,
- gplfuturecrcindex;
+ unsigned int i;
+ unsigned int symindex = 0;
+ unsigned int strindex = 0;
+ unsigned int setupindex;
+ unsigned int exindex;
+ unsigned int exportindex;
+ unsigned int modindex;
+ unsigned int obsparmindex;
+ unsigned int infoindex;
+ unsigned int gplindex;
+ unsigned int crcindex;
+ unsigned int gplcrcindex;
+ unsigned int versindex;
+ unsigned int pcpuindex;
+ unsigned int gplfutureindex;
+ unsigned int gplfuturecrcindex;
+ unsigned int unwindex = 0;
+ unsigned int unusedindex;
+ unsigned int unusedcrcindex;
+ unsigned int unusedgplindex;
+ unsigned int unusedgplcrcindex;
struct module *mod;
long err = 0;
void *percpu = NULL, *ptr = NULL; /* Stops spurious gcc warning */
exportindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab");
gplindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_gpl");
gplfutureindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_gpl_future");
+ unusedindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_unused");
+ unusedgplindex = find_sec(hdr, sechdrs, secstrings, "__ksymtab_unused_gpl");
crcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab");
gplcrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_gpl");
gplfuturecrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_gpl_future");
+ unusedcrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_unused");
+ unusedgplcrcindex = find_sec(hdr, sechdrs, secstrings, "__kcrctab_unused_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);
+#ifdef ARCH_UNWIND_SECTION_NAME
+ unwindex = find_sec(hdr, sechdrs, secstrings, ARCH_UNWIND_SECTION_NAME);
+#endif
/* Don't keep modinfo section */
sechdrs[infoindex].sh_flags &= ~(unsigned long)SHF_ALLOC;
sechdrs[symindex].sh_flags |= SHF_ALLOC;
sechdrs[strindex].sh_flags |= SHF_ALLOC;
#endif
+ if (unwindex)
+ sechdrs[unwindex].sh_flags |= SHF_ALLOC;
/* Check module struct version now, before we try to use module. */
if (!check_modstruct_version(sechdrs, versindex, mod)) {
modmagic = get_modinfo(sechdrs, infoindex, "vermagic");
/* This is allowed: modprobe --force will invalidate it. */
if (!modmagic) {
- add_taint(TAINT_FORCED_MODULE);
+ add_taint_module(mod, TAINT_FORCED_MODULE);
printk(KERN_WARNING "%s: no version magic, tainting kernel.\n",
mod->name);
} else if (!same_magic(modmagic, vermagic)) {
/* Now we've moved module, initialize linked lists, etc. */
module_unload_init(mod);
+ /* Initialize kobject, so we can reference it. */
+ if (mod_sysfs_init(mod) != 0)
+ goto cleanup;
+
/* Set up license info based on the info section */
set_license(mod, get_modinfo(sechdrs, infoindex, "license"));
if (strcmp(mod->name, "ndiswrapper") == 0)
add_taint(TAINT_PROPRIETARY_MODULE);
if (strcmp(mod->name, "driverloader") == 0)
- add_taint(TAINT_PROPRIETARY_MODULE);
+ add_taint_module(mod, TAINT_PROPRIETARY_MODULE);
/* Set up MODINFO_ATTR fields */
setup_modinfo(mod, sechdrs, infoindex);
mod->gpl_crcs = (void *)sechdrs[gplcrcindex].sh_addr;
mod->num_gpl_future_syms = sechdrs[gplfutureindex].sh_size /
sizeof(*mod->gpl_future_syms);
+ mod->num_unused_syms = sechdrs[unusedindex].sh_size /
+ sizeof(*mod->unused_syms);
+ mod->num_unused_gpl_syms = sechdrs[unusedgplindex].sh_size /
+ sizeof(*mod->unused_gpl_syms);
mod->gpl_future_syms = (void *)sechdrs[gplfutureindex].sh_addr;
if (gplfuturecrcindex)
mod->gpl_future_crcs = (void *)sechdrs[gplfuturecrcindex].sh_addr;
+ mod->unused_syms = (void *)sechdrs[unusedindex].sh_addr;
+ if (unusedcrcindex)
+ mod->unused_crcs = (void *)sechdrs[unusedcrcindex].sh_addr;
+ mod->unused_gpl_syms = (void *)sechdrs[unusedgplindex].sh_addr;
+ if (unusedgplcrcindex)
+ mod->unused_crcs = (void *)sechdrs[unusedgplcrcindex].sh_addr;
+
#ifdef CONFIG_MODVERSIONS
if ((mod->num_syms && !crcindex) ||
(mod->num_gpl_syms && !gplcrcindex) ||
- (mod->num_gpl_future_syms && !gplfuturecrcindex)) {
+ (mod->num_gpl_future_syms && !gplfuturecrcindex) ||
+ (mod->num_unused_syms && !unusedcrcindex) ||
+ (mod->num_unused_gpl_syms && !unusedgplcrcindex)) {
printk(KERN_WARNING "%s: No versions for exported symbols."
" Tainting kernel.\n", mod->name);
- add_taint(TAINT_FORCED_MODULE);
+ add_taint_module(mod, TAINT_FORCED_MODULE);
}
#endif
goto arch_cleanup;
add_sect_attrs(mod, hdr->e_shnum, secstrings, sechdrs);
+ /* Size of section 0 is 0, so this works well if no unwind info. */
+ mod->unwind_info = unwind_add_table(mod,
+ (void *)sechdrs[unwindex].sh_addr,
+ sechdrs[unwindex].sh_size);
+
/* Get rid of temporary copy */
vfree(hdr);
mod->state = MODULE_STATE_LIVE;
/* Drop initial reference. */
module_put(mod);
+ unwind_remove_table(mod->unwind_info, 1);
module_free(mod, mod->module_init);
mod->module_init = NULL;
mod->init_size = 0;
if (!best)
return NULL;
- *size = nextval - mod->symtab[best].st_value;
- *offset = addr - mod->symtab[best].st_value;
+ if (size)
+ *size = nextval - mod->symtab[best].st_value;
+ if (offset)
+ *offset = addr - mod->symtab[best].st_value;
return mod->strtab + mod->symtab[best].st_name;
}
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;
+ if (modname)
+ *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])
+int lookup_module_symbol_name(unsigned long addr, char *symname)
+{
+ struct module *mod;
+
+ mutex_lock(&module_mutex);
+ list_for_each_entry(mod, &modules, list) {
+ if (within(addr, mod->module_init, mod->init_size) ||
+ within(addr, mod->module_core, mod->core_size)) {
+ const char *sym;
+
+ sym = get_ksymbol(mod, addr, NULL, NULL);
+ if (!sym)
+ goto out;
+ strlcpy(symname, sym, KSYM_NAME_LEN);
+ mutex_unlock(&module_mutex);
+ return 0;
+ }
+ }
+out:
+ mutex_unlock(&module_mutex);
+ return -ERANGE;
+}
+
+int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size,
+ unsigned long *offset, char *modname, char *name)
+{
+ struct module *mod;
+
+ mutex_lock(&module_mutex);
+ list_for_each_entry(mod, &modules, list) {
+ if (within(addr, mod->module_init, mod->init_size) ||
+ within(addr, mod->module_core, mod->core_size)) {
+ const char *sym;
+
+ sym = get_ksymbol(mod, addr, size, offset);
+ if (!sym)
+ goto out;
+ if (modname)
+ strlcpy(modname, mod->name, MODULE_NAME_LEN);
+ if (name)
+ strlcpy(name, sym, KSYM_NAME_LEN);
+ mutex_unlock(&module_mutex);
+ return 0;
+ }
+ }
+out:
+ mutex_unlock(&module_mutex);
+ return -ERANGE;
+}
+
+int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
+ char *name, char *module_name, int *exported)
{
struct module *mod;
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);
+ strlcpy(name, mod->strtab + mod->symtab[symnum].st_name,
+ KSYM_NAME_LEN);
+ strlcpy(module_name, mod->name, MODULE_NAME_LEN);
+ *exported = is_exported(name, mod);
mutex_unlock(&module_mutex);
- return mod;
+ return 0;
}
symnum -= mod->num_symtab;
}
mutex_unlock(&module_mutex);
- return NULL;
+ return -ERANGE;
}
static unsigned long mod_find_symname(struct module *mod, const char *name)
/* 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;
-
mutex_lock(&module_mutex);
- list_for_each(i, &modules) {
- if (n++ == *pos)
- break;
- }
- if (i == &modules)
- return NULL;
- return i;
+ return seq_list_start(&modules, *pos);
}
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;
+ return seq_list_next(p, &modules, pos);
}
static void m_stop(struct seq_file *m, void *p)
mutex_unlock(&module_mutex);
}
+static char *taint_flags(unsigned int taints, char *buf)
+{
+ int bx = 0;
+
+ if (taints) {
+ buf[bx++] = '(';
+ if (taints & TAINT_PROPRIETARY_MODULE)
+ buf[bx++] = 'P';
+ if (taints & TAINT_FORCED_MODULE)
+ buf[bx++] = 'F';
+ /*
+ * TAINT_FORCED_RMMOD: could be added.
+ * TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't
+ * apply to modules.
+ */
+ buf[bx++] = ')';
+ }
+ buf[bx] = '\0';
+
+ return buf;
+}
+
static int m_show(struct seq_file *m, void *p)
{
struct module *mod = list_entry(p, struct module, list);
+ char buf[8];
+
seq_printf(m, "%s %lu",
mod->name, mod->init_size + mod->core_size);
print_unload_info(m, mod);
/* Used by oprofile and other similar tools. */
seq_printf(m, " 0x%p", mod->module_core);
+ /* Taints info */
+ if (mod->taints)
+ seq_printf(m, " %s", taint_flags(mod->taints, buf));
+
seq_printf(m, "\n");
return 0;
}
Where refcount is a number or -, and deps is a comma-separated list
of depends or -.
*/
-struct seq_operations modules_op = {
+const struct seq_operations modules_op = {
.start = m_start,
.next = m_next,
.stop = m_stop,
/* 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);
+ preempt_disable();
list_for_each_entry(mod, &modules, list) {
if (mod->num_exentries == 0)
continue;
if (e)
break;
}
- spin_unlock_irqrestore(&modlist_lock, flags);
+ preempt_enable();
/* 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. */
+/*
+ * Is this a valid module address?
+ */
+int is_module_address(unsigned long addr)
+{
+ struct module *mod;
+
+ preempt_disable();
+
+ list_for_each_entry(mod, &modules, list) {
+ if (within(addr, mod->module_core, mod->core_size)) {
+ preempt_enable();
+ return 1;
+ }
+ }
+
+ preempt_enable();
+
+ return 0;
+}
+
+
+/* Is this a valid kernel address? */
struct module *__module_text_address(unsigned long addr)
{
struct module *mod;
struct module *module_text_address(unsigned long addr)
{
struct module *mod;
- unsigned long flags;
- spin_lock_irqsave(&modlist_lock, flags);
+ preempt_disable();
mod = __module_text_address(addr);
- spin_unlock_irqrestore(&modlist_lock, flags);
+ preempt_enable();
return mod;
}
void print_modules(void)
{
struct module *mod;
+ char buf[8];
printk("Modules linked in:");
list_for_each_entry(mod, &modules, list)
- printk(" %s", mod->name);
+ printk(" %s%s", mod->name, taint_flags(mod->taints, buf));
printk("\n");
}
+#ifdef CONFIG_SYSFS
+static char *make_driver_name(struct device_driver *drv)
+{
+ char *driver_name;
+
+ driver_name = kmalloc(strlen(drv->name) + strlen(drv->bus->name) + 2,
+ GFP_KERNEL);
+ if (!driver_name)
+ return NULL;
+
+ sprintf(driver_name, "%s:%s", drv->bus->name, drv->name);
+ return driver_name;
+}
+
+static void module_create_drivers_dir(struct module_kobject *mk)
+{
+ if (!mk || mk->drivers_dir)
+ return;
+
+ mk->drivers_dir = kobject_add_dir(&mk->kobj, "drivers");
+}
+
void module_add_driver(struct module *mod, struct device_driver *drv)
{
- if (!mod || !drv)
+ char *driver_name;
+ int no_warn;
+ struct module_kobject *mk = NULL;
+
+ if (!drv)
+ return;
+
+ if (mod)
+ mk = &mod->mkobj;
+ else if (drv->mod_name) {
+ struct kobject *mkobj;
+
+ /* Lookup built-in module entry in /sys/modules */
+ mkobj = kset_find_obj(&module_subsys, drv->mod_name);
+ if (mkobj) {
+ mk = container_of(mkobj, struct module_kobject, kobj);
+ /* remember our module structure */
+ drv->mkobj = mk;
+ /* kset_find_obj took a reference */
+ kobject_put(mkobj);
+ }
+ }
+
+ if (!mk)
return;
- /* Don't check return code; this call is idempotent */
- sysfs_create_link(&drv->kobj, &mod->mkobj.kobj, "module");
+ /* Don't check return codes; these calls are idempotent */
+ no_warn = sysfs_create_link(&drv->kobj, &mk->kobj, "module");
+ driver_name = make_driver_name(drv);
+ if (driver_name) {
+ module_create_drivers_dir(mk);
+ no_warn = sysfs_create_link(mk->drivers_dir, &drv->kobj,
+ driver_name);
+ kfree(driver_name);
+ }
}
EXPORT_SYMBOL(module_add_driver);
void module_remove_driver(struct device_driver *drv)
{
+ struct module_kobject *mk = NULL;
+ char *driver_name;
+
if (!drv)
return;
+
sysfs_remove_link(&drv->kobj, "module");
+
+ if (drv->owner)
+ mk = &drv->owner->mkobj;
+ else if (drv->mkobj)
+ mk = drv->mkobj;
+ if (mk && mk->drivers_dir) {
+ driver_name = make_driver_name(drv);
+ if (driver_name) {
+ sysfs_remove_link(mk->drivers_dir, driver_name);
+ kfree(driver_name);
+ }
+ }
}
EXPORT_SYMBOL(module_remove_driver);
+#endif
#ifdef CONFIG_MODVERSIONS
/* Generate the signature for struct module here, too, for modversions. */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff