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authorLinus Torvalds <torvalds@linux-foundation.org>2016-08-04 16:14:38 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-08-04 16:14:38 +0300
commitfb1b83d3ff78168e10799627f231cf0c05c9d80d (patch)
tree57feaa178322a776825329c3c7c170aee2ded837 /include
parentd597690eef4142cf622fd469859ecc56506119b5 (diff)
parent49aadcf1b6f4240751921dad52e86c760d70a5f1 (diff)
downloadlinux-fb1b83d3ff78168e10799627f231cf0c05c9d80d.tar.xz
Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull module updates from Rusty Russell: "The only interesting thing here is Jessica's patch to add ro_after_init support to modules. The rest are all trivia" * tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: extable.h: add stddef.h so "NULL" definition is not implicit modules: add ro_after_init support jump_label: disable preemption around __module_text_address(). exceptions: fork exception table content from module.h into extable.h modules: Add kernel parameter to blacklist modules module: Do a WARN_ON_ONCE() for assert module mutex not held Documentation/module-signing.txt: Note need for version info if reusing a key module: Invalidate signatures on force-loaded modules module: Issue warnings when tainting kernel module: fix redundant test. module: fix noreturn attribute for __module_put_and_exit()
Diffstat (limited to 'include')
-rw-r--r--include/linux/extable.h32
-rw-r--r--include/linux/module.h37
-rw-r--r--include/uapi/linux/elf.h1
3 files changed, 41 insertions, 29 deletions
diff --git a/include/linux/extable.h b/include/linux/extable.h
new file mode 100644
index 000000000000..7effea4b257d
--- /dev/null
+++ b/include/linux/extable.h
@@ -0,0 +1,32 @@
+#ifndef _LINUX_EXTABLE_H
+#define _LINUX_EXTABLE_H
+
+#include <linux/stddef.h> /* for NULL */
+
+struct module;
+struct exception_table_entry;
+
+const struct exception_table_entry *
+search_extable(const struct exception_table_entry *first,
+ const struct exception_table_entry *last,
+ unsigned long value);
+void sort_extable(struct exception_table_entry *start,
+ struct exception_table_entry *finish);
+void sort_main_extable(void);
+void trim_init_extable(struct module *m);
+
+/* Given an address, look for it in the exception tables */
+const struct exception_table_entry *search_exception_tables(unsigned long add);
+
+#ifdef CONFIG_MODULES
+/* For extable.c to search modules' exception tables. */
+const struct exception_table_entry *search_module_extables(unsigned long addr);
+#else
+static inline const struct exception_table_entry *
+search_module_extables(unsigned long addr)
+{
+ return NULL;
+}
+#endif /*CONFIG_MODULES*/
+
+#endif /* _LINUX_EXTABLE_H */
diff --git a/include/linux/module.h b/include/linux/module.h
index 3daf2b3a09d2..0c3207d26ac0 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -18,6 +18,7 @@
#include <linux/moduleparam.h>
#include <linux/jump_label.h>
#include <linux/export.h>
+#include <linux/extable.h> /* only as arch move module.h -> extable.h */
#include <linux/rbtree_latch.h>
#include <linux/percpu.h>
@@ -37,6 +38,7 @@ struct modversion_info {
};
struct module;
+struct exception_table_entry;
struct module_kobject {
struct kobject kobj;
@@ -155,18 +157,6 @@ extern void cleanup_module(void);
#define __INITRODATA_OR_MODULE __INITRODATA
#endif /*CONFIG_MODULES*/
-/* Archs provide a method of finding the correct exception table. */
-struct exception_table_entry;
-
-const struct exception_table_entry *
-search_extable(const struct exception_table_entry *first,
- const struct exception_table_entry *last,
- unsigned long value);
-void sort_extable(struct exception_table_entry *start,
- struct exception_table_entry *finish);
-void sort_main_extable(void);
-void trim_init_extable(struct module *m);
-
/* Generic info of form tag = "info" */
#define MODULE_INFO(tag, info) __MODULE_INFO(tag, tag, info)
@@ -268,9 +258,6 @@ extern const typeof(name) __mod_##type##__##name##_device_table \
* files require multiple MODULE_FIRMWARE() specifiers */
#define MODULE_FIRMWARE(_firmware) MODULE_INFO(firmware, _firmware)
-/* Given an address, look for it in the exception tables */
-const struct exception_table_entry *search_exception_tables(unsigned long add);
-
struct notifier_block;
#ifdef CONFIG_MODULES
@@ -311,6 +298,8 @@ struct module_layout {
unsigned int text_size;
/* Size of RO section of the module (text+rodata) */
unsigned int ro_size;
+ /* Size of RO after init section */
+ unsigned int ro_after_init_size;
#ifdef CONFIG_MODULES_TREE_LOOKUP
struct mod_tree_node mtn;
@@ -575,8 +564,8 @@ 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));
+extern void __noreturn __module_put_and_exit(struct module *mod,
+ long code);
#define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code)
#ifdef CONFIG_MODULE_UNLOAD
@@ -630,9 +619,6 @@ const char *module_address_lookup(unsigned long addr,
int lookup_module_symbol_name(unsigned long addr, char *symname);
int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name);
-/* For extable.c to search modules' exception tables. */
-const struct exception_table_entry *search_module_extables(unsigned long addr);
-
int register_module_notifier(struct notifier_block *nb);
int unregister_module_notifier(struct notifier_block *nb);
@@ -657,13 +643,6 @@ static inline bool is_livepatch_module(struct module *mod)
#else /* !CONFIG_MODULES... */
-/* Given an address, look for it in the exception tables. */
-static inline const struct exception_table_entry *
-search_module_extables(unsigned long addr)
-{
- return NULL;
-}
-
static inline struct module *__module_address(unsigned long addr)
{
return NULL;
@@ -788,12 +767,12 @@ extern int module_sysfs_initialized;
#ifdef CONFIG_DEBUG_SET_MODULE_RONX
extern void set_all_modules_text_rw(void);
extern void set_all_modules_text_ro(void);
-extern void module_enable_ro(const struct module *mod);
+extern void module_enable_ro(const struct module *mod, bool after_init);
extern void module_disable_ro(const struct module *mod);
#else
static inline void set_all_modules_text_rw(void) { }
static inline void set_all_modules_text_ro(void) { }
-static inline void module_enable_ro(const struct module *mod) { }
+static inline void module_enable_ro(const struct module *mod, bool after_init) { }
static inline void module_disable_ro(const struct module *mod) { }
#endif
diff --git a/include/uapi/linux/elf.h b/include/uapi/linux/elf.h
index cb4a72f888d5..70b172ba41ce 100644
--- a/include/uapi/linux/elf.h
+++ b/include/uapi/linux/elf.h
@@ -286,6 +286,7 @@ typedef struct elf64_phdr {
#define SHF_ALLOC 0x2
#define SHF_EXECINSTR 0x4
#define SHF_RELA_LIVEPATCH 0x00100000
+#define SHF_RO_AFTER_INIT 0x00200000
#define SHF_MASKPROC 0xf0000000
/* special section indexes */