diff options
| -rw-r--r-- | kernel/module.c | 56 |
1 files changed, 32 insertions, 24 deletions
diff --git a/kernel/module.c b/kernel/module.c index cabafe22844..f3cba93ea1e 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -117,6 +117,8 @@ struct load_info { char *secstrings, *strtab; unsigned long *strmap; unsigned long symoffs, stroffs; + struct _ddebug *debug; + unsigned int num_debug; struct { unsigned int sym, str, mod, vers, info, pcpu; } index; @@ -1993,7 +1995,7 @@ static void layout_symtab(struct module *mod, struct load_info *info) mod->core_size += bitmap_weight(info->strmap, strsect->sh_size); } -static void add_kallsyms(struct module *mod, struct load_info *info) +static void add_kallsyms(struct module *mod, const struct load_info *info) { unsigned int i, ndst; const Elf_Sym *src; @@ -2040,6 +2042,8 @@ static void add_kallsyms(struct module *mod, struct load_info *info) static void dynamic_debug_setup(struct _ddebug *debug, unsigned int num) { + if (!debug) + return; #ifdef CONFIG_DYNAMIC_DEBUG if (ddebug_add_module(debug, num, debug->modname)) printk(KERN_ERR "dynamic debug error adding module: %s\n", @@ -2267,8 +2271,7 @@ static int check_modinfo(struct module *mod, struct load_info *info) return 0; } -static void find_module_sections(struct module *mod, - const struct load_info *info) +static void find_module_sections(struct module *mod, struct load_info *info) { mod->kp = section_objs(info, "__param", sizeof(*mod->kp), &mod->num_kp); @@ -2323,9 +2326,15 @@ static void find_module_sections(struct module *mod, &mod->num_ftrace_callsites); #endif + mod->extable = section_objs(info, "__ex_table", + sizeof(*mod->extable), &mod->num_exentries); + if (section_addr(info, "__obsparm")) printk(KERN_WARNING "%s: Ignoring obsolete parameters\n", mod->name); + + info->debug = section_objs(info, "__verbose", + sizeof(*info->debug), &info->num_debug); } static int move_module(struct module *mod, struct load_info *info) @@ -2512,6 +2521,20 @@ static void module_deallocate(struct module *mod, struct load_info *info) module_free(mod, mod->module_core); } +static int post_relocation(struct module *mod, const struct load_info *info) +{ + sort_extable(mod->extable, mod->extable + mod->num_exentries); + + /* Copy relocated percpu area over. */ + percpu_modcopy(mod, (void *)info->sechdrs[info->index.pcpu].sh_addr, + info->sechdrs[info->index.pcpu].sh_size); + + add_kallsyms(mod, info); + + /* Arch-specific module finalizing. */ + return module_finalize(info->hdr, info->sechdrs, mod); +} + /* Allocate and load the module: note that size of section 0 is always zero, and we rely on this for optional sections. */ static noinline struct module *load_module(void __user *umod, @@ -2521,8 +2544,6 @@ static noinline struct module *load_module(void __user *umod, struct load_info info = { NULL, }; struct module *mod; long err; - struct _ddebug *debug = NULL; - unsigned int num_debug = 0; DEBUGP("load_module: umod=%p, len=%lu, uargs=%p\n", umod, len, uargs); @@ -2564,22 +2585,7 @@ static noinline struct module *load_module(void __user *umod, if (err < 0) goto free_modinfo; - /* Set up and sort exception table */ - mod->extable = section_objs(&info, "__ex_table", - sizeof(*mod->extable), &mod->num_exentries); - sort_extable(mod->extable, mod->extable + mod->num_exentries); - - /* Finally, copy percpu area over. */ - percpu_modcopy(mod, (void *)info.sechdrs[info.index.pcpu].sh_addr, - info.sechdrs[info.index.pcpu].sh_size); - - add_kallsyms(mod, &info); - - if (!mod->taints) - debug = section_objs(&info, "__verbose", - sizeof(*debug), &num_debug); - - err = module_finalize(info.hdr, info.sechdrs, mod); + err = post_relocation(mod, &info); if (err < 0) goto free_modinfo; @@ -2607,8 +2613,9 @@ static noinline struct module *load_module(void __user *umod, goto unlock; } - if (debug) - dynamic_debug_setup(debug, num_debug); + /* This has to be done once we're sure module name is unique. */ + if (!mod->taints) + dynamic_debug_setup(info.debug, info.num_debug); /* Find duplicate symbols */ err = verify_export_symbols(mod); @@ -2640,7 +2647,8 @@ static noinline struct module *load_module(void __user *umod, /* Unlink carefully: kallsyms could be walking list. */ list_del_rcu(&mod->list); ddebug: - dynamic_debug_remove(debug); + if (!mod->taints) + dynamic_debug_remove(info.debug); unlock: mutex_unlock(&module_mutex); synchronize_sched(); |