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-rw-r--r--include/linux/kallsyms.h15
-rw-r--r--include/linux/module.h12
-rw-r--r--kernel/kallsyms.c19
-rw-r--r--kernel/module.c19
4 files changed, 65 insertions, 0 deletions
diff --git a/include/linux/kallsyms.h b/include/linux/kallsyms.h
index f3fe34391d8e..792274269f2b 100644
--- a/include/linux/kallsyms.h
+++ b/include/linux/kallsyms.h
@@ -13,10 +13,17 @@
#define KSYM_SYMBOL_LEN (sizeof("%s+%#lx/%#lx [%s]") + (KSYM_NAME_LEN - 1) + \
2*(BITS_PER_LONG*3/10) + (MODULE_NAME_LEN - 1) + 1)
+struct module;
+
#ifdef CONFIG_KALLSYMS
/* Lookup the address for a symbol. Returns 0 if not found. */
unsigned long kallsyms_lookup_name(const char *name);
+/* Call a function on each kallsyms symbol in the core kernel */
+int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *,
+ unsigned long),
+ void *data);
+
extern int kallsyms_lookup_size_offset(unsigned long addr,
unsigned long *symbolsize,
unsigned long *offset);
@@ -43,6 +50,14 @@ static inline unsigned long kallsyms_lookup_name(const char *name)
return 0;
}
+static inline int kallsyms_on_each_symbol(int (*fn)(void *, const char *,
+ struct module *,
+ unsigned long),
+ void *data)
+{
+ return 0;
+}
+
static inline int kallsyms_lookup_size_offset(unsigned long addr,
unsigned long *symbolsize,
unsigned long *offset)
diff --git a/include/linux/module.h b/include/linux/module.h
index 69761ce0dbf0..c3d3fc4ffb18 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -387,6 +387,10 @@ int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
/* Look for this name: can be of form module:name. */
unsigned long module_kallsyms_lookup_name(const char *name);
+int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
+ struct module *, unsigned long),
+ void *data);
+
extern void __module_put_and_exit(struct module *mod, long code)
__attribute__((noreturn));
#define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code);
@@ -566,6 +570,14 @@ static inline unsigned long module_kallsyms_lookup_name(const char *name)
return 0;
}
+static inline int module_kallsyms_on_each_symbol(int (*fn)(void *, const char *,
+ struct module *,
+ unsigned long),
+ void *data)
+{
+ return 0;
+}
+
static inline int register_module_notifier(struct notifier_block * nb)
{
/* no events will happen anyway, so this can always succeed */
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index 7b8b0f21a5b1..374faf9bfdc7 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -161,6 +161,25 @@ unsigned long kallsyms_lookup_name(const char *name)
return module_kallsyms_lookup_name(name);
}
+int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *,
+ unsigned long),
+ void *data)
+{
+ char namebuf[KSYM_NAME_LEN];
+ unsigned long i;
+ unsigned int off;
+ int ret;
+
+ for (i = 0, off = 0; i < kallsyms_num_syms; i++) {
+ off = kallsyms_expand_symbol(off, namebuf);
+ ret = fn(data, namebuf, NULL, kallsyms_addresses[i]);
+ if (ret != 0)
+ return ret;
+ }
+ return module_kallsyms_on_each_symbol(fn, data);
+}
+EXPORT_SYMBOL_GPL(kallsyms_on_each_symbol);
+
static unsigned long get_symbol_pos(unsigned long addr,
unsigned long *symbolsize,
unsigned long *offset)
diff --git a/kernel/module.c b/kernel/module.c
index 8ddca629e079..dd4389be9152 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2612,6 +2612,25 @@ unsigned long module_kallsyms_lookup_name(const char *name)
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)