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author | Jan Glauber <jang@linux.vnet.ibm.com> | 2011-05-20 00:55:26 +0200 |
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committer | Rusty Russell <rusty@rustcorp.com.au> | 2011-05-19 09:25:26 +0200 |
commit | 01526ed0830643bd53a8434c3068e4c077e1b09d (patch) | |
tree | 6fe0fecf55f6fe5bc94f95f9b0e01f67a53bf9d0 /kernel/module.c | |
parent | module: undo module RONX protection correctly. (diff) | |
download | linux-01526ed0830643bd53a8434c3068e4c077e1b09d.tar.xz linux-01526ed0830643bd53a8434c3068e4c077e1b09d.zip |
module: split unset_section_ro_nx function.
Split the unprotect function into a function per section to make
the code more readable and add the missing static declaration.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'kernel/module.c')
-rw-r--r-- | kernel/module.c | 45 |
1 files changed, 23 insertions, 22 deletions
diff --git a/kernel/module.c b/kernel/module.c index b99dcebc980d..0e6f97f43c88 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -1607,24 +1607,24 @@ static void set_section_ro_nx(void *base, } } -/* Setting memory back to W+X before releasing it */ -void unset_section_ro_nx(struct module *mod, void *module_region) -{ - if (mod->module_core == module_region) { - set_page_attributes(mod->module_core + mod->core_text_size, - mod->module_core + mod->core_size, - set_memory_x); - set_page_attributes(mod->module_core, - mod->module_core + mod->core_ro_size, - set_memory_rw); - } else if (mod->module_init == module_region) { - set_page_attributes(mod->module_init + mod->init_text_size, - mod->module_init + mod->init_size, - set_memory_x); - set_page_attributes(mod->module_init, - mod->module_init + mod->init_ro_size, - set_memory_rw); - } +static void unset_module_core_ro_nx(struct module *mod) +{ + set_page_attributes(mod->module_core + mod->core_text_size, + mod->module_core + mod->core_size, + set_memory_x); + set_page_attributes(mod->module_core, + mod->module_core + mod->core_ro_size, + set_memory_rw); +} + +static void unset_module_init_ro_nx(struct module *mod) +{ + set_page_attributes(mod->module_init + mod->init_text_size, + mod->module_init + mod->init_size, + set_memory_x); + set_page_attributes(mod->module_init, + mod->module_init + mod->init_ro_size, + set_memory_rw); } /* Iterate through all modules and set each module's text as RW */ @@ -1670,7 +1670,8 @@ void set_all_modules_text_ro(void) } #else static inline void set_section_ro_nx(void *base, unsigned long text_size, unsigned long ro_size, unsigned long total_size) { } -static inline void unset_section_ro_nx(struct module *mod, void *module_region) { } +static void unset_module_core_ro_nx(struct module *mod) { } +static void unset_module_init_ro_nx(struct module *mod) { } #endif /* Free a module, remove from lists, etc. */ @@ -1697,7 +1698,7 @@ static void free_module(struct module *mod) destroy_params(mod->kp, mod->num_kp); /* This may be NULL, but that's OK */ - unset_section_ro_nx(mod, mod->module_init); + unset_module_init_ro_nx(mod); module_free(mod, mod->module_init); kfree(mod->args); percpu_modfree(mod); @@ -1706,7 +1707,7 @@ static void free_module(struct module *mod) lockdep_free_key_range(mod->module_core, mod->core_size); /* Finally, free the core (containing the module structure) */ - unset_section_ro_nx(mod, mod->module_core); + unset_module_core_ro_nx(mod); module_free(mod, mod->module_core); #ifdef CONFIG_MPU @@ -2932,7 +2933,7 @@ SYSCALL_DEFINE3(init_module, void __user *, umod, mod->symtab = mod->core_symtab; mod->strtab = mod->core_strtab; #endif - unset_section_ro_nx(mod, mod->module_init); + unset_module_init_ro_nx(mod); module_free(mod, mod->module_init); mod->module_init = NULL; mod->init_size = 0; |