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Diffstat (limited to 'include/linux/module.h')
-rw-r--r--include/linux/module.h70
1 files changed, 34 insertions, 36 deletions
diff --git a/include/linux/module.h b/include/linux/module.h
index b229a9961..2bb0c3085 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -302,6 +302,28 @@ struct mod_tree_node {
struct latch_tree_node node;
};
+struct module_layout {
+ /* The actual code + data. */
+ void *base;
+ /* Total size. */
+ unsigned int size;
+ /* The size of the executable code. */
+ unsigned int text_size;
+ /* Size of RO section of the module (text+rodata) */
+ unsigned int ro_size;
+
+#ifdef CONFIG_MODULES_TREE_LOOKUP
+ struct mod_tree_node mtn;
+#endif
+};
+
+#ifdef CONFIG_MODULES_TREE_LOOKUP
+/* Only touch one cacheline for common rbtree-for-core-layout case. */
+#define __module_layout_align ____cacheline_aligned
+#else
+#define __module_layout_align
+#endif
+
struct mod_kallsyms {
Elf_Sym *symtab;
unsigned int num_symtab;
@@ -372,37 +394,9 @@ struct module {
/* Startup function. */
int (*init)(void);
- /*
- * If this is non-NULL, vfree() after init() returns.
- *
- * Cacheline align here, such that:
- * module_init, module_core, init_size, core_size,
- * init_text_size, core_text_size and mtn_core::{mod,node[0]}
- * are on the same cacheline.
- */
- void *module_init ____cacheline_aligned;
-
- /* Here is the actual code + data, vfree'd on unload. */
- void *module_core;
-
- /* Here are the sizes of the init and core sections */
- unsigned int init_size, core_size;
-
- /* The size of the executable code in each section. */
- unsigned int init_text_size, core_text_size;
-
-#ifdef CONFIG_MODULES_TREE_LOOKUP
- /*
- * We want mtn_core::{mod,node[0]} to be in the same cacheline as the
- * above entries such that a regular lookup will only touch one
- * cacheline.
- */
- struct mod_tree_node mtn_core;
- struct mod_tree_node mtn_init;
-#endif
-
- /* Size of RO sections of the module (text+rodata) */
- unsigned int init_ro_size, core_ro_size;
+ /* Core layout: rbtree is accessed frequently, so keep together. */
+ struct module_layout core_layout __module_layout_align;
+ struct module_layout init_layout;
/* Arch-specific module values */
struct mod_arch_specific arch;
@@ -420,7 +414,7 @@ struct module {
/* Protected by RCU and/or module_mutex: use rcu_dereference() */
struct mod_kallsyms *kallsyms;
struct mod_kallsyms core_kallsyms;
-
+
/* Section attributes */
struct module_sect_attrs *sect_attrs;
@@ -506,15 +500,15 @@ bool is_module_text_address(unsigned long addr);
static inline bool within_module_core(unsigned long addr,
const struct module *mod)
{
- return (unsigned long)mod->module_core <= addr &&
- addr < (unsigned long)mod->module_core + mod->core_size;
+ return (unsigned long)mod->core_layout.base <= addr &&
+ addr < (unsigned long)mod->core_layout.base + mod->core_layout.size;
}
static inline bool within_module_init(unsigned long addr,
const struct module *mod)
{
- return (unsigned long)mod->module_init <= addr &&
- addr < (unsigned long)mod->module_init + mod->init_size;
+ return (unsigned long)mod->init_layout.base <= addr &&
+ addr < (unsigned long)mod->init_layout.base + mod->init_layout.size;
}
static inline bool within_module(unsigned long addr, const struct module *mod)
@@ -769,9 +763,13 @@ 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_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_disable_ro(const struct module *mod) { }
#endif
#ifdef CONFIG_GENERIC_BUG