/* List of modules, protected by module_mutex or preempt_disable
* (delete uses stop_machine/add uses RCU list operations). */
-static DEFINE_MUTEX(module_mutex);
+DEFINE_MUTEX(module_mutex);
+EXPORT_SYMBOL_GPL(module_mutex);
static LIST_HEAD(modules);
/* Waiting for a module to finish initializing? */
#define symversion(base, idx) ((base != NULL) ? ((base) + (idx)) : NULL)
#endif
-struct symsearch {
- const struct kernel_symbol *start, *stop;
- const unsigned long *crcs;
- enum {
- NOT_GPL_ONLY,
- GPL_ONLY,
- WILL_BE_GPL_ONLY,
- } licence;
- bool unused;
-};
-
static bool each_symbol_in_section(const struct symsearch *arr,
unsigned int arrsize,
struct module *owner,
}
/* Returns true as soon as fn returns true, otherwise false. */
-static bool each_symbol(bool (*fn)(const struct symsearch *arr,
- struct module *owner,
- unsigned int symnum, void *data),
- void *data)
+bool each_symbol(bool (*fn)(const struct symsearch *arr, struct module *owner,
+ unsigned int symnum, void *data), void *data)
{
struct module *mod;
const struct symsearch arr[] = {
}
return false;
}
+EXPORT_SYMBOL_GPL(each_symbol);
struct find_symbol_arg {
/* Input */
/* Find a symbol and return it, along with, (optional) crc and
* (optional) module which owns it */
-static const struct kernel_symbol *find_symbol(const char *name,
- struct module **owner,
- const unsigned long **crc,
- bool gplok,
- bool warn)
+const struct kernel_symbol *find_symbol(const char *name,
+ struct module **owner,
+ const unsigned long **crc,
+ bool gplok,
+ bool warn)
{
struct find_symbol_arg fsa;
DEBUGP("Failed to find symbol %s\n", name);
return NULL;
}
+EXPORT_SYMBOL_GPL(find_symbol);
/* Search for module by name: must hold module_mutex. */
-static struct module *find_module(const char *name)
+struct module *find_module(const char *name)
{
struct module *mod;
}
return NULL;
}
+EXPORT_SYMBOL_GPL(find_module);
#ifdef CONFIG_SMP
}
/* Module a uses b */
-static int use_module(struct module *a, struct module *b)
+int use_module(struct module *a, struct module *b)
{
struct module_use *use;
int no_warn, err;
no_warn = sysfs_create_link(b->holders_dir, &a->mkobj.kobj, a->name);
return 1;
}
+EXPORT_SYMBOL_GPL(use_module);
/* Clear the unload stuff of the module. */
static void module_unload_free(struct module *mod)
if (core_kernel_text((unsigned long)addr))
return;
- if (!(modaddr = module_text_address((unsigned long)addr)))
- BUG();
+ /* module_text_address is safe here: we're supposed to have reference
+ * to module from symbol_get, so it can't go away. */
+ modaddr = __module_text_address((unsigned long)addr);
+ BUG_ON(!modaddr);
module_put(modaddr);
}
EXPORT_SYMBOL_GPL(symbol_put_addr);
{
}
-static inline int use_module(struct module *a, struct module *b)
+int use_module(struct module *a, struct module *b)
{
return strong_try_module_get(b) == 0;
}
+EXPORT_SYMBOL_GPL(use_module);
static inline void module_unload_init(struct module *mod)
{
static const char vermagic[] = VERMAGIC_STRING;
-static int try_to_force_load(struct module *mod, const char *symname)
+static int try_to_force_load(struct module *mod, const char *reason)
{
#ifdef CONFIG_MODULE_FORCE_LOAD
if (!test_taint(TAINT_FORCED_MODULE))
- printk("%s: no version for \"%s\" found: kernel tainted.\n",
- mod->name, symname);
+ printk(KERN_WARNING "%s: %s: kernel tainted.\n",
+ mod->name, reason);
add_taint_module(mod, TAINT_FORCED_MODULE);
return 0;
#else
{
const unsigned long *crc;
- if (!find_symbol("struct_module", NULL, &crc, true, false))
+ if (!find_symbol("module_layout", NULL, &crc, true, false))
BUG();
- return check_version(sechdrs, versindex, "struct_module", mod, crc);
+ return check_version(sechdrs, versindex, "module_layout", mod, crc);
}
/* First part is kernel version, which we ignore if module has crcs. */
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)
+ || strstarts(secstrings + s->sh_name, ".init"))
continue;
s->sh_entsize = get_offset(mod, &mod->core_size, s, i);
DEBUGP("\t%s\n", secstrings + s->sh_name);
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)
+ || !strstarts(secstrings + s->sh_name, ".init"))
continue;
s->sh_entsize = (get_offset(mod, &mod->init_size, s, i)
| INIT_OFFSET_MASK);
else
return 'b';
}
- if (strncmp(secstrings + sechdrs[sym->st_shndx].sh_name,
- ".debug", strlen(".debug")) == 0)
+ if (strstarts(secstrings + sechdrs[sym->st_shndx].sh_name, ".debug"))
return 'n';
return '?';
}
if (len > 64 * 1024 * 1024 || (hdr = vmalloc(len)) == NULL)
return ERR_PTR(-ENOMEM);
- /* Create stop_machine threads since the error path relies on
- * a non-failing stop_machine call. */
- err = stop_machine_create();
- if (err)
- goto free_hdr;
-
if (copy_from_user(hdr, umod, len) != 0) {
err = -EFAULT;
goto free_hdr;
}
#ifndef CONFIG_MODULE_UNLOAD
/* Don't load .exit sections */
- if (strncmp(secstrings+sechdrs[i].sh_name, ".exit", 5) == 0)
+ if (strstarts(secstrings+sechdrs[i].sh_name, ".exit"))
sechdrs[i].sh_flags &= ~(unsigned long)SHF_ALLOC;
#endif
}
modmagic = get_modinfo(sechdrs, infoindex, "vermagic");
/* This is allowed: modprobe --force will invalidate it. */
if (!modmagic) {
- err = try_to_force_load(mod, "magic");
+ err = try_to_force_load(mod, "bad vermagic");
if (err)
goto free_hdr;
} else if (!same_magic(modmagic, vermagic, versindex)) {
|| (mod->num_unused_gpl_syms && !mod->unused_gpl_crcs)
#endif
) {
- printk(KERN_WARNING "%s: No versions for exported symbols.\n", mod->name);
- err = try_to_force_load(mod, "nocrc");
+ err = try_to_force_load(mod,
+ "no versions for exported symbols");
if (err)
goto cleanup;
}
/* Get rid of temporary copy */
vfree(hdr);
- stop_machine_destroy();
/* Done! */
return mod;
unlink:
- stop_machine(__unlink_module, mod, NULL);
+ /* Unlink carefully: kallsyms could be walking list. */
+ list_del_rcu(&mod->list);
+ synchronize_sched();
module_arch_cleanup(mod);
cleanup:
kobject_del(&mod->mkobj.kobj);
kfree(args);
free_hdr:
vfree(hdr);
- stop_machine_destroy();
return ERR_PTR(err);
truncated:
preempt_enable();
return ret;
}
+
+int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
+ struct module *, unsigned long),
+ void *data)
+{
+ struct module *mod;
+ unsigned int i;
+ int ret;
+
+ list_for_each_entry(mod, &modules, list) {
+ for (i = 0; i < mod->num_symtab; i++) {
+ ret = fn(data, mod->strtab + mod->symtab[i].st_name,
+ mod, mod->symtab[i].st_value);
+ if (ret != 0)
+ return ret;
+ }
+ }
+ return 0;
+}
#endif /* CONFIG_KALLSYMS */
static char *module_flags(struct module *mod, char *buf)
* Must be called with preempt disabled or module mutex held so that
* module doesn't get freed during this.
*/
-__notrace_funcgraph struct module *__module_address(unsigned long addr)
+struct module *__module_address(unsigned long addr)
{
struct module *mod;
return mod;
return NULL;
}
+EXPORT_SYMBOL_GPL(__module_address);
/*
* is_module_text_address - is this address inside module code?
}
return mod;
}
-
-struct module *module_text_address(unsigned long addr)
-{
- struct module *mod;
-
- preempt_disable();
- mod = __module_text_address(addr);
- preempt_enable();
-
- return mod;
-}
+EXPORT_SYMBOL_GPL(__module_text_address);
/* Don't grab lock, we're oopsing. */
void print_modules(void)
}
#ifdef CONFIG_MODVERSIONS
-/* Generate the signature for struct module here, too, for modversions. */
-void struct_module(struct module *mod) { return; }
-EXPORT_SYMBOL(struct_module);
+/* Generate the signature for all relevant module structures here.
+ * If these change, we don't want to try to parse the module. */
+void module_layout(struct module *mod,
+ struct modversion_info *ver,
+ struct kernel_param *kp,
+ struct kernel_symbol *ks,
+ struct marker *marker,
+ struct tracepoint *tp)
+{
+}
+EXPORT_SYMBOL(module_layout);
#endif
#ifdef CONFIG_MARKERS
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff