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kernel/module.c
96.7 KB
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/* |
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Copyright (C) 2002 Richard Henderson |
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Copyright (C) 2001 Rusty Russell, 2002, 2010 Rusty Russell IBM. |
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This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ |
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#include <linux/export.h> |
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#include <linux/moduleloader.h> |
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#include <linux/ftrace_event.h> |
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#include <linux/init.h> |
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#include <linux/kallsyms.h> |
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#include <linux/file.h> |
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#include <linux/fs.h> |
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#include <linux/sysfs.h> |
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#include <linux/kernel.h> |
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#include <linux/slab.h> #include <linux/vmalloc.h> #include <linux/elf.h> |
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#include <linux/proc_fs.h> |
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#include <linux/security.h> |
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#include <linux/seq_file.h> #include <linux/syscalls.h> #include <linux/fcntl.h> #include <linux/rcupdate.h> |
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#include <linux/capability.h> |
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#include <linux/cpu.h> #include <linux/moduleparam.h> #include <linux/errno.h> #include <linux/err.h> #include <linux/vermagic.h> #include <linux/notifier.h> |
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#include <linux/sched.h> |
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#include <linux/stop_machine.h> #include <linux/device.h> |
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#include <linux/string.h> |
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#include <linux/mutex.h> |
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#include <linux/rculist.h> |
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#include <asm/uaccess.h> |
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#include <asm/cacheflush.h> |
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#include <asm/mmu_context.h> |
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#include <linux/license.h> |
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#include <asm/sections.h> |
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#include <linux/tracepoint.h> |
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#include <linux/ftrace.h> |
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#include <linux/async.h> |
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#include <linux/percpu.h> |
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#include <linux/kmemleak.h> |
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#include <linux/jump_label.h> |
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#include <linux/pfn.h> |
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#include <linux/bsearch.h> |
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#include <linux/fips.h> |
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#include <uapi/linux/module.h> |
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#include "module-internal.h" |
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|
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#define CREATE_TRACE_POINTS #include <trace/events/module.h> |
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#ifndef ARCH_SHF_SMALL #define ARCH_SHF_SMALL 0 #endif |
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/* * Modules' sections will be aligned on page boundaries * to ensure complete separation of code and data, but * only when CONFIG_DEBUG_SET_MODULE_RONX=y */ #ifdef CONFIG_DEBUG_SET_MODULE_RONX # define debug_align(X) ALIGN(X, PAGE_SIZE) #else # define debug_align(X) (X) #endif /* * Given BASE and SIZE this macro calculates the number of pages the * memory regions occupies */ #define MOD_NUMBER_OF_PAGES(BASE, SIZE) (((SIZE) > 0) ? \ (PFN_DOWN((unsigned long)(BASE) + (SIZE) - 1) - \ PFN_DOWN((unsigned long)BASE) + 1) \ : (0UL)) |
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/* If this is set, the section belongs in the init part of the module */ #define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1)) |
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/* * Mutex protects: * 1) List of modules (also safely readable with preempt_disable), * 2) module_use links, * 3) module_addr_min/module_addr_max. |
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* (delete uses stop_machine/add uses RCU list operations). */ |
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DEFINE_MUTEX(module_mutex); EXPORT_SYMBOL_GPL(module_mutex); |
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static LIST_HEAD(modules); |
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#ifdef CONFIG_KGDB_KDB struct list_head *kdb_modules = &modules; /* kdb needs the list of modules */ #endif /* CONFIG_KGDB_KDB */ |
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#ifdef CONFIG_MODULE_SIG #ifdef CONFIG_MODULE_SIG_FORCE static bool sig_enforce = true; #else static bool sig_enforce = false; static int param_set_bool_enable_only(const char *val, const struct kernel_param *kp) { int err; bool test; struct kernel_param dummy_kp = *kp; dummy_kp.arg = &test; err = param_set_bool(val, &dummy_kp); if (err) return err; /* Don't let them unset it once it's set! */ if (!test && sig_enforce) return -EROFS; if (test) sig_enforce = true; return 0; } static const struct kernel_param_ops param_ops_bool_enable_only = { .set = param_set_bool_enable_only, .get = param_get_bool, }; #define param_check_bool_enable_only param_check_bool module_param(sig_enforce, bool_enable_only, 0644); #endif /* !CONFIG_MODULE_SIG_FORCE */ #endif /* CONFIG_MODULE_SIG */ |
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/* Block module loading/unloading? */ int modules_disabled = 0; |
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core_param(nomodule, modules_disabled, bint, 0); |
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|
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/* Waiting for a module to finish initializing? */ static DECLARE_WAIT_QUEUE_HEAD(module_wq); |
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static BLOCKING_NOTIFIER_HEAD(module_notify_list); |
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|
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/* Bounds of module allocation, for speeding __module_address. * Protected by module_mutex. */ |
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static unsigned long module_addr_min = -1UL, module_addr_max = 0; |
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int register_module_notifier(struct notifier_block * nb) { |
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return blocking_notifier_chain_register(&module_notify_list, nb); |
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} EXPORT_SYMBOL(register_module_notifier); int unregister_module_notifier(struct notifier_block * nb) { |
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return blocking_notifier_chain_unregister(&module_notify_list, nb); |
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} EXPORT_SYMBOL(unregister_module_notifier); |
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struct load_info { Elf_Ehdr *hdr; unsigned long len; Elf_Shdr *sechdrs; |
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char *secstrings, *strtab; |
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unsigned long symoffs, stroffs; |
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struct _ddebug *debug; unsigned int num_debug; |
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bool sig_ok; |
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struct { unsigned int sym, str, mod, vers, info, pcpu; } index; }; |
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/* We require a truly strong try_module_get(): 0 means failure due to ongoing or failed initialization etc. */ |
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static inline int strong_try_module_get(struct module *mod) { |
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BUG_ON(mod && mod->state == MODULE_STATE_UNFORMED); |
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if (mod && mod->state == MODULE_STATE_COMING) |
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return -EBUSY; if (try_module_get(mod)) |
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return 0; |
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else return -ENOENT; |
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} |
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static inline void add_taint_module(struct module *mod, unsigned flag, enum lockdep_ok lockdep_ok) |
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{ |
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add_taint(flag, lockdep_ok); |
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mod->taints |= (1U << flag); |
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} |
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/* * A thread that wants to hold a reference to a module only while it * is running can call this to safely exit. nfsd and lockd use this. |
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*/ void __module_put_and_exit(struct module *mod, long code) { module_put(mod); do_exit(code); } EXPORT_SYMBOL(__module_put_and_exit); |
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/* Find a module section: 0 means not found. */ |
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static unsigned int find_sec(const struct load_info *info, const char *name) |
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{ unsigned int i; |
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for (i = 1; i < info->hdr->e_shnum; i++) { Elf_Shdr *shdr = &info->sechdrs[i]; |
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/* Alloc bit cleared means "ignore it." */ |
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if ((shdr->sh_flags & SHF_ALLOC) && strcmp(info->secstrings + shdr->sh_name, name) == 0) |
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return i; |
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} |
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return 0; } |
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/* Find a module section, or NULL. */ |
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static void *section_addr(const struct load_info *info, const char *name) |
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{ /* Section 0 has sh_addr 0. */ |
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return (void *)info->sechdrs[find_sec(info, name)].sh_addr; |
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} /* Find a module section, or NULL. Fill in number of "objects" in section. */ |
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static void *section_objs(const struct load_info *info, |
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const char *name, size_t object_size, unsigned int *num) { |
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unsigned int sec = find_sec(info, name); |
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/* Section 0 has sh_addr 0 and sh_size 0. */ |
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*num = info->sechdrs[sec].sh_size / object_size; return (void *)info->sechdrs[sec].sh_addr; |
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} |
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/* Provided by the linker */ extern const struct kernel_symbol __start___ksymtab[]; extern const struct kernel_symbol __stop___ksymtab[]; extern const struct kernel_symbol __start___ksymtab_gpl[]; extern const struct kernel_symbol __stop___ksymtab_gpl[]; |
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extern const struct kernel_symbol __start___ksymtab_gpl_future[]; extern const struct kernel_symbol __stop___ksymtab_gpl_future[]; |
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extern const unsigned long __start___kcrctab[]; extern const unsigned long __start___kcrctab_gpl[]; |
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extern const unsigned long __start___kcrctab_gpl_future[]; |
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#ifdef CONFIG_UNUSED_SYMBOLS extern const struct kernel_symbol __start___ksymtab_unused[]; extern const struct kernel_symbol __stop___ksymtab_unused[]; extern const struct kernel_symbol __start___ksymtab_unused_gpl[]; extern const struct kernel_symbol __stop___ksymtab_unused_gpl[]; |
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extern const unsigned long __start___kcrctab_unused[]; extern const unsigned long __start___kcrctab_unused_gpl[]; |
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#endif |
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#ifndef CONFIG_MODVERSIONS #define symversion(base, idx) NULL #else |
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#define symversion(base, idx) ((base != NULL) ? ((base) + (idx)) : NULL) |
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#endif |
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static bool each_symbol_in_section(const struct symsearch *arr, unsigned int arrsize, struct module *owner, bool (*fn)(const struct symsearch *syms, struct module *owner, |
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void *data), |
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void *data) |
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{ |
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unsigned int j; |
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|
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for (j = 0; j < arrsize; j++) { |
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if (fn(&arr[j], owner, data)) return true; |
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} |
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return false; |
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} |
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/* Returns true as soon as fn returns true, otherwise false. */ |
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bool each_symbol_section(bool (*fn)(const struct symsearch *arr, struct module *owner, void *data), void *data) |
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{ struct module *mod; |
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static const struct symsearch arr[] = { |
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{ __start___ksymtab, __stop___ksymtab, __start___kcrctab, |
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NOT_GPL_ONLY, false }, |
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{ __start___ksymtab_gpl, __stop___ksymtab_gpl, |
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__start___kcrctab_gpl, GPL_ONLY, false }, |
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{ __start___ksymtab_gpl_future, __stop___ksymtab_gpl_future, |
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__start___kcrctab_gpl_future, WILL_BE_GPL_ONLY, false }, |
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#ifdef CONFIG_UNUSED_SYMBOLS |
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{ __start___ksymtab_unused, __stop___ksymtab_unused, |
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__start___kcrctab_unused, NOT_GPL_ONLY, true }, |
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{ __start___ksymtab_unused_gpl, __stop___ksymtab_unused_gpl, |
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__start___kcrctab_unused_gpl, GPL_ONLY, true }, |
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#endif |
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}; |
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|
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if (each_symbol_in_section(arr, ARRAY_SIZE(arr), NULL, fn, data)) return true; |
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|
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list_for_each_entry_rcu(mod, &modules, list) { |
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struct symsearch arr[] = { { mod->syms, mod->syms + mod->num_syms, mod->crcs, |
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NOT_GPL_ONLY, false }, |
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{ mod->gpl_syms, mod->gpl_syms + mod->num_gpl_syms, |
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mod->gpl_crcs, GPL_ONLY, false }, |
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{ mod->gpl_future_syms, mod->gpl_future_syms + mod->num_gpl_future_syms, |
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mod->gpl_future_crcs, WILL_BE_GPL_ONLY, false }, |
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#ifdef CONFIG_UNUSED_SYMBOLS |
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{ mod->unused_syms, mod->unused_syms + mod->num_unused_syms, |
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mod->unused_crcs, NOT_GPL_ONLY, true }, |
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{ mod->unused_gpl_syms, mod->unused_gpl_syms + mod->num_unused_gpl_syms, |
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mod->unused_gpl_crcs, GPL_ONLY, true }, |
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#endif |
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}; |
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if (mod->state == MODULE_STATE_UNFORMED) continue; |
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if (each_symbol_in_section(arr, ARRAY_SIZE(arr), mod, fn, data)) return true; } return false; } |
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EXPORT_SYMBOL_GPL(each_symbol_section); |
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struct find_symbol_arg { /* Input */ const char *name; bool gplok; bool warn; /* Output */ struct module *owner; const unsigned long *crc; |
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const struct kernel_symbol *sym; |
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}; |
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static bool check_symbol(const struct symsearch *syms, struct module *owner, unsigned int symnum, void *data) |
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{ struct find_symbol_arg *fsa = data; |
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if (!fsa->gplok) { if (syms->licence == GPL_ONLY) return false; if (syms->licence == WILL_BE_GPL_ONLY && fsa->warn) { printk(KERN_WARNING "Symbol %s is being used " "by a non-GPL module, which will not " "be allowed in the future ", fsa->name); |
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} |
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} |
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#ifdef CONFIG_UNUSED_SYMBOLS |
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if (syms->unused && fsa->warn) { printk(KERN_WARNING "Symbol %s is marked as UNUSED, " "however this module is using it. ", fsa->name); printk(KERN_WARNING "This symbol will go away in the future. "); printk(KERN_WARNING "Please evalute if this is the right api to use and if " "it really is, submit a report the linux kernel " "mailinglist together with submitting your code for " "inclusion. "); } |
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#endif |
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fsa->owner = owner; fsa->crc = symversion(syms->crcs, symnum); |
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fsa->sym = &syms->start[symnum]; |
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return true; } |
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static int cmp_name(const void *va, const void *vb) { const char *a; const struct kernel_symbol *b; a = va; b = vb; return strcmp(a, b->name); } |
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static bool find_symbol_in_section(const struct symsearch *syms, struct module *owner, void *data) { struct find_symbol_arg *fsa = data; |
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struct kernel_symbol *sym; sym = bsearch(fsa->name, syms->start, syms->stop - syms->start, sizeof(struct kernel_symbol), cmp_name); if (sym != NULL && check_symbol(syms, owner, sym - syms->start, data)) return true; |
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|
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return false; } |
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/* Find a symbol and return it, along with, (optional) crc and |
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* (optional) module which owns it. Needs preempt disabled or module_mutex. */ |
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413 414 415 416 417 |
const struct kernel_symbol *find_symbol(const char *name, struct module **owner, const unsigned long **crc, bool gplok, bool warn) |
dafd0940c module: generic e... |
418 419 420 421 422 423 |
{ struct find_symbol_arg fsa; fsa.name = name; fsa.gplok = gplok; fsa.warn = warn; |
de4d8d534 module: each_symb... |
424 |
if (each_symbol_section(find_symbol_in_section, &fsa)) { |
dafd0940c module: generic e... |
425 426 427 428 |
if (owner) *owner = fsa.owner; if (crc) *crc = fsa.crc; |
414fd31b2 module: Make find... |
429 |
return fsa.sym; |
dafd0940c module: generic e... |
430 |
} |
5e1241692 module: replace D... |
431 432 |
pr_debug("Failed to find symbol %s ", name); |
414fd31b2 module: Make find... |
433 |
return NULL; |
1da177e4c Linux-2.6.12-rc2 |
434 |
} |
c6b378019 module: Export sy... |
435 |
EXPORT_SYMBOL_GPL(find_symbol); |
1da177e4c Linux-2.6.12-rc2 |
436 |
|
1da177e4c Linux-2.6.12-rc2 |
437 |
/* Search for module by name: must hold module_mutex. */ |
0d21b0e34 module: add new s... |
438 439 |
static struct module *find_module_all(const char *name, bool even_unformed) |
1da177e4c Linux-2.6.12-rc2 |
440 441 442 443 |
{ struct module *mod; list_for_each_entry(mod, &modules, list) { |
0d21b0e34 module: add new s... |
444 445 |
if (!even_unformed && mod->state == MODULE_STATE_UNFORMED) continue; |
1da177e4c Linux-2.6.12-rc2 |
446 447 448 449 450 |
if (strcmp(mod->name, name) == 0) return mod; } return NULL; } |
0d21b0e34 module: add new s... |
451 452 453 454 455 |
struct module *find_module(const char *name) { return find_module_all(name, false); } |
c6b378019 module: Export sy... |
456 |
EXPORT_SYMBOL_GPL(find_module); |
1da177e4c Linux-2.6.12-rc2 |
457 458 |
#ifdef CONFIG_SMP |
fbf59bc9d percpu: implement... |
459 |
|
259354dea module: encapsula... |
460 |
static inline void __percpu *mod_percpu(struct module *mod) |
fbf59bc9d percpu: implement... |
461 |
{ |
259354dea module: encapsula... |
462 463 |
return mod->percpu; } |
fbf59bc9d percpu: implement... |
464 |
|
259354dea module: encapsula... |
465 466 467 |
static int percpu_modalloc(struct module *mod, unsigned long size, unsigned long align) { |
fbf59bc9d percpu: implement... |
468 469 470 |
if (align > PAGE_SIZE) { printk(KERN_WARNING "%s: per-cpu alignment %li > %li ", |
259354dea module: encapsula... |
471 |
mod->name, align, PAGE_SIZE); |
fbf59bc9d percpu: implement... |
472 473 |
align = PAGE_SIZE; } |
259354dea module: encapsula... |
474 475 |
mod->percpu = __alloc_reserved_percpu(size, align); if (!mod->percpu) { |
fbf59bc9d percpu: implement... |
476 |
printk(KERN_WARNING |
d913188c7 module: layout_an... |
477 478 479 |
"%s: Could not allocate %lu bytes percpu data ", mod->name, size); |
259354dea module: encapsula... |
480 481 482 483 |
return -ENOMEM; } mod->percpu_size = size; return 0; |
fbf59bc9d percpu: implement... |
484 |
} |
259354dea module: encapsula... |
485 |
static void percpu_modfree(struct module *mod) |
fbf59bc9d percpu: implement... |
486 |
{ |
259354dea module: encapsula... |
487 |
free_percpu(mod->percpu); |
fbf59bc9d percpu: implement... |
488 |
} |
49668688d module: pass load... |
489 |
static unsigned int find_pcpusec(struct load_info *info) |
6b588c18f module: reorder m... |
490 |
{ |
49668688d module: pass load... |
491 |
return find_sec(info, ".data..percpu"); |
6b588c18f module: reorder m... |
492 |
} |
259354dea module: encapsula... |
493 494 |
static void percpu_modcopy(struct module *mod, const void *from, unsigned long size) |
6b588c18f module: reorder m... |
495 496 497 498 |
{ int cpu; for_each_possible_cpu(cpu) |
259354dea module: encapsula... |
499 |
memcpy(per_cpu_ptr(mod->percpu, cpu), from, size); |
6b588c18f module: reorder m... |
500 |
} |
10fad5e46 percpu, module: i... |
501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 |
/** * is_module_percpu_address - test whether address is from module static percpu * @addr: address to test * * Test whether @addr belongs to module static percpu area. * * RETURNS: * %true if @addr is from module static percpu area */ bool is_module_percpu_address(unsigned long addr) { struct module *mod; unsigned int cpu; preempt_disable(); list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
518 519 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
10fad5e46 percpu, module: i... |
520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 |
if (!mod->percpu_size) continue; for_each_possible_cpu(cpu) { void *start = per_cpu_ptr(mod->percpu, cpu); if ((void *)addr >= start && (void *)addr < start + mod->percpu_size) { preempt_enable(); return true; } } } preempt_enable(); return false; |
6b588c18f module: reorder m... |
535 |
} |
1da177e4c Linux-2.6.12-rc2 |
536 |
#else /* ... !CONFIG_SMP */ |
6b588c18f module: reorder m... |
537 |
|
259354dea module: encapsula... |
538 |
static inline void __percpu *mod_percpu(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
539 540 541 |
{ return NULL; } |
259354dea module: encapsula... |
542 543 544 545 546 547 |
static inline int percpu_modalloc(struct module *mod, unsigned long size, unsigned long align) { return -ENOMEM; } static inline void percpu_modfree(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
548 |
{ |
1da177e4c Linux-2.6.12-rc2 |
549 |
} |
49668688d module: pass load... |
550 |
static unsigned int find_pcpusec(struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
551 552 553 |
{ return 0; } |
259354dea module: encapsula... |
554 555 |
static inline void percpu_modcopy(struct module *mod, const void *from, unsigned long size) |
1da177e4c Linux-2.6.12-rc2 |
556 557 558 559 |
{ /* pcpusec should be 0, and size of that section should be 0. */ BUG_ON(size != 0); } |
10fad5e46 percpu, module: i... |
560 561 562 563 |
bool is_module_percpu_address(unsigned long addr) { return false; } |
6b588c18f module: reorder m... |
564 |
|
1da177e4c Linux-2.6.12-rc2 |
565 |
#endif /* CONFIG_SMP */ |
c988d2b28 [PATCH] modules: ... |
566 567 568 569 570 571 |
#define MODINFO_ATTR(field) \ static void setup_modinfo_##field(struct module *mod, const char *s) \ { \ mod->field = kstrdup(s, GFP_KERNEL); \ } \ static ssize_t show_modinfo_##field(struct module_attribute *mattr, \ |
4befb026c module: change at... |
572 |
struct module_kobject *mk, char *buffer) \ |
c988d2b28 [PATCH] modules: ... |
573 |
{ \ |
4befb026c module: change at... |
574 575 |
return sprintf(buffer, "%s ", mk->mod->field); \ |
c988d2b28 [PATCH] modules: ... |
576 577 578 579 580 581 582 |
} \ static int modinfo_##field##_exists(struct module *mod) \ { \ return mod->field != NULL; \ } \ static void free_modinfo_##field(struct module *mod) \ { \ |
22a8bdeb5 whitespace fixes:... |
583 584 |
kfree(mod->field); \ mod->field = NULL; \ |
c988d2b28 [PATCH] modules: ... |
585 586 |
} \ static struct module_attribute modinfo_##field = { \ |
7b595756e sysfs: kill unnec... |
587 |
.attr = { .name = __stringify(field), .mode = 0444 }, \ |
c988d2b28 [PATCH] modules: ... |
588 589 590 591 592 593 594 595 |
.show = show_modinfo_##field, \ .setup = setup_modinfo_##field, \ .test = modinfo_##field##_exists, \ .free = free_modinfo_##field, \ }; MODINFO_ATTR(version); MODINFO_ATTR(srcversion); |
e14af7eeb debug: track and ... |
596 |
static char last_unloaded_module[MODULE_NAME_LEN+1]; |
03e88ae1b [PATCH] fix modul... |
597 |
#ifdef CONFIG_MODULE_UNLOAD |
eb0c53771 tracing: Fix comp... |
598 599 |
EXPORT_TRACEPOINT_SYMBOL(module_get); |
1da177e4c Linux-2.6.12-rc2 |
600 |
/* Init the unload section of the module. */ |
9f85a4bbb module: refactor ... |
601 |
static int module_unload_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
602 |
{ |
9f85a4bbb module: refactor ... |
603 604 605 |
mod->refptr = alloc_percpu(struct module_ref); if (!mod->refptr) return -ENOMEM; |
2c02dfe7f module: Make the ... |
606 607 |
INIT_LIST_HEAD(&mod->source_list); INIT_LIST_HEAD(&mod->target_list); |
e1783a240 module: Use this_... |
608 |
|
1da177e4c Linux-2.6.12-rc2 |
609 |
/* Hold reference count during initialization. */ |
5fbfb18d7 Fix up possibly r... |
610 |
__this_cpu_write(mod->refptr->incs, 1); |
1da177e4c Linux-2.6.12-rc2 |
611 612 |
/* Backwards compatibility macros put refcount during init. */ mod->waiter = current; |
9f85a4bbb module: refactor ... |
613 614 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
615 |
} |
1da177e4c Linux-2.6.12-rc2 |
616 617 618 619 |
/* Does a already use b? */ static int already_uses(struct module *a, struct module *b) { struct module_use *use; |
2c02dfe7f module: Make the ... |
620 621 |
list_for_each_entry(use, &b->source_list, source_list) { if (use->source == a) { |
5e1241692 module: replace D... |
622 623 |
pr_debug("%s uses %s! ", a->name, b->name); |
1da177e4c Linux-2.6.12-rc2 |
624 625 626 |
return 1; } } |
5e1241692 module: replace D... |
627 628 |
pr_debug("%s does not use %s! ", a->name, b->name); |
1da177e4c Linux-2.6.12-rc2 |
629 630 |
return 0; } |
2c02dfe7f module: Make the ... |
631 632 633 634 635 636 637 638 639 |
/* * Module a uses b * - we add 'a' as a "source", 'b' as a "target" of module use * - the module_use is added to the list of 'b' sources (so * 'b' can walk the list to see who sourced them), and of 'a' * targets (so 'a' can see what modules it targets). */ static int add_module_usage(struct module *a, struct module *b) { |
2c02dfe7f module: Make the ... |
640 |
struct module_use *use; |
5e1241692 module: replace D... |
641 642 |
pr_debug("Allocating new usage for %s. ", a->name); |
2c02dfe7f module: Make the ... |
643 644 645 646 647 648 649 650 651 652 653 |
use = kmalloc(sizeof(*use), GFP_ATOMIC); if (!use) { printk(KERN_WARNING "%s: out of memory loading ", a->name); return -ENOMEM; } use->source = a; use->target = b; list_add(&use->source_list, &b->source_list); list_add(&use->target_list, &a->target_list); |
2c02dfe7f module: Make the ... |
654 655 |
return 0; } |
75676500f module: make lock... |
656 |
/* Module a uses b: caller needs module_mutex() */ |
9bea7f239 module: fix bne2 ... |
657 |
int ref_module(struct module *a, struct module *b) |
1da177e4c Linux-2.6.12-rc2 |
658 |
{ |
c8e21ced0 module: fix kdb's... |
659 |
int err; |
270a6c4ca /sys/modules/*/ho... |
660 |
|
9bea7f239 module: fix bne2 ... |
661 |
if (b == NULL || already_uses(a, b)) |
218ce7351 Revert "module: d... |
662 |
return 0; |
218ce7351 Revert "module: d... |
663 |
|
9bea7f239 module: fix bne2 ... |
664 665 |
/* If module isn't available, we fail. */ err = strong_try_module_get(b); |
c9a3ba55b module: wait for ... |
666 |
if (err) |
9bea7f239 module: fix bne2 ... |
667 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
668 |
|
2c02dfe7f module: Make the ... |
669 670 |
err = add_module_usage(a, b); if (err) { |
1da177e4c Linux-2.6.12-rc2 |
671 |
module_put(b); |
9bea7f239 module: fix bne2 ... |
672 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
673 |
} |
9bea7f239 module: fix bne2 ... |
674 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
675 |
} |
9bea7f239 module: fix bne2 ... |
676 |
EXPORT_SYMBOL_GPL(ref_module); |
1da177e4c Linux-2.6.12-rc2 |
677 678 679 680 |
/* Clear the unload stuff of the module. */ static void module_unload_free(struct module *mod) { |
2c02dfe7f module: Make the ... |
681 |
struct module_use *use, *tmp; |
1da177e4c Linux-2.6.12-rc2 |
682 |
|
75676500f module: make lock... |
683 |
mutex_lock(&module_mutex); |
2c02dfe7f module: Make the ... |
684 685 |
list_for_each_entry_safe(use, tmp, &mod->target_list, target_list) { struct module *i = use->target; |
5e1241692 module: replace D... |
686 687 |
pr_debug("%s unusing %s ", mod->name, i->name); |
2c02dfe7f module: Make the ... |
688 689 690 691 |
module_put(i); list_del(&use->source_list); list_del(&use->target_list); kfree(use); |
1da177e4c Linux-2.6.12-rc2 |
692 |
} |
75676500f module: make lock... |
693 |
mutex_unlock(&module_mutex); |
9f85a4bbb module: refactor ... |
694 695 |
free_percpu(mod->refptr); |
1da177e4c Linux-2.6.12-rc2 |
696 697 698 |
} #ifdef CONFIG_MODULE_FORCE_UNLOAD |
fb1697933 [PATCH] modules: ... |
699 |
static inline int try_force_unload(unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
700 701 702 |
{ int ret = (flags & O_TRUNC); if (ret) |
373d4d099 taint: add explic... |
703 |
add_taint(TAINT_FORCED_RMMOD, LOCKDEP_NOW_UNRELIABLE); |
1da177e4c Linux-2.6.12-rc2 |
704 705 706 |
return ret; } #else |
fb1697933 [PATCH] modules: ... |
707 |
static inline int try_force_unload(unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 |
{ return 0; } #endif /* CONFIG_MODULE_FORCE_UNLOAD */ struct stopref { struct module *mod; int flags; int *forced; }; /* Whole machine is stopped with interrupts off when this runs. */ static int __try_stop_module(void *_sref) { struct stopref *sref = _sref; |
da39ba5e1 module: don't use... |
724 725 |
/* If it's not unused, quit unless we're forcing. */ if (module_refcount(sref->mod) != 0) { |
fb1697933 [PATCH] modules: ... |
726 |
if (!(*sref->forced = try_force_unload(sref->flags))) |
1da177e4c Linux-2.6.12-rc2 |
727 728 729 730 731 732 733 734 735 736 |
return -EWOULDBLOCK; } /* Mark it as dying. */ sref->mod->state = MODULE_STATE_GOING; return 0; } static int try_stop_module(struct module *mod, int flags, int *forced) { |
da39ba5e1 module: don't use... |
737 738 |
if (flags & O_NONBLOCK) { struct stopref sref = { mod, flags, forced }; |
1da177e4c Linux-2.6.12-rc2 |
739 |
|
9b1a4d383 stop_machine: Wea... |
740 |
return stop_machine(__try_stop_module, &sref, NULL); |
da39ba5e1 module: don't use... |
741 742 743 744 745 746 |
} else { /* We don't need to stop the machine for this. */ mod->state = MODULE_STATE_GOING; synchronize_sched(); return 0; } |
1da177e4c Linux-2.6.12-rc2 |
747 |
} |
bd77c0477 module: struct mo... |
748 |
unsigned long module_refcount(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
749 |
{ |
bd77c0477 module: struct mo... |
750 |
unsigned long incs = 0, decs = 0; |
720eba31f modules: Use a be... |
751 |
int cpu; |
1da177e4c Linux-2.6.12-rc2 |
752 |
|
720eba31f modules: Use a be... |
753 |
for_each_possible_cpu(cpu) |
5fbfb18d7 Fix up possibly r... |
754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 |
decs += per_cpu_ptr(mod->refptr, cpu)->decs; /* * ensure the incs are added up after the decs. * module_put ensures incs are visible before decs with smp_wmb. * * This 2-count scheme avoids the situation where the refcount * for CPU0 is read, then CPU0 increments the module refcount, * then CPU1 drops that refcount, then the refcount for CPU1 is * read. We would record a decrement but not its corresponding * increment so we would see a low count (disaster). * * Rare situation? But module_refcount can be preempted, and we * might be tallying up 4096+ CPUs. So it is not impossible. */ smp_rmb(); for_each_possible_cpu(cpu) incs += per_cpu_ptr(mod->refptr, cpu)->incs; return incs - decs; |
1da177e4c Linux-2.6.12-rc2 |
772 773 774 775 776 777 778 779 |
} EXPORT_SYMBOL(module_refcount); /* This exists whether we can unload or not */ static void free_module(struct module *mod); static void wait_for_zero_refcount(struct module *mod) { |
a65502075 kernel: Remove un... |
780 |
/* Since we might sleep for some time, release the mutex first */ |
6389a3851 [PATCH] kernel/mo... |
781 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
782 |
for (;;) { |
5e1241692 module: replace D... |
783 784 |
pr_debug("Looking at refcount... "); |
1da177e4c Linux-2.6.12-rc2 |
785 786 787 788 789 790 |
set_current_state(TASK_UNINTERRUPTIBLE); if (module_refcount(mod) == 0) break; schedule(); } current->state = TASK_RUNNING; |
6389a3851 [PATCH] kernel/mo... |
791 |
mutex_lock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
792 |
} |
17da2bd90 [CVE-2009-0029] S... |
793 794 |
SYSCALL_DEFINE2(delete_module, const char __user *, name_user, unsigned int, flags) |
1da177e4c Linux-2.6.12-rc2 |
795 796 |
{ struct module *mod; |
dfff0a067 Revert "Driver co... |
797 |
char name[MODULE_NAME_LEN]; |
1da177e4c Linux-2.6.12-rc2 |
798 |
int ret, forced = 0; |
3d43321b7 modules: sysctl t... |
799 |
if (!capable(CAP_SYS_MODULE) || modules_disabled) |
dfff0a067 Revert "Driver co... |
800 801 802 803 804 |
return -EPERM; if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0) return -EFAULT; name[MODULE_NAME_LEN-1] = '\0'; |
3fc1f1e27 stop_machine: rei... |
805 806 |
if (mutex_lock_interruptible(&module_mutex) != 0) return -EINTR; |
1da177e4c Linux-2.6.12-rc2 |
807 808 809 810 811 812 |
mod = find_module(name); if (!mod) { ret = -ENOENT; goto out; } |
2c02dfe7f module: Make the ... |
813 |
if (!list_empty(&mod->source_list)) { |
1da177e4c Linux-2.6.12-rc2 |
814 815 816 817 818 819 820 821 822 |
/* Other modules depend on us: get rid of them first. */ ret = -EWOULDBLOCK; goto out; } /* Doing init or already dying? */ if (mod->state != MODULE_STATE_LIVE) { /* FIXME: if (force), slam module count and wake up waiter --RR */ |
5e1241692 module: replace D... |
823 824 |
pr_debug("%s already dying ", mod->name); |
1da177e4c Linux-2.6.12-rc2 |
825 826 827 828 829 |
ret = -EBUSY; goto out; } /* If it has an init func, it must have an exit func to unload */ |
af49d9248 Remove "unsafe" f... |
830 |
if (mod->init && !mod->exit) { |
fb1697933 [PATCH] modules: ... |
831 |
forced = try_force_unload(flags); |
1da177e4c Linux-2.6.12-rc2 |
832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 |
if (!forced) { /* This module can't be removed */ ret = -EBUSY; goto out; } } /* Set this up before setting mod->state */ mod->waiter = current; /* Stop the machine so refcounts can't move and disable module. */ ret = try_stop_module(mod, flags, &forced); if (ret != 0) goto out; /* Never wait if forced. */ if (!forced && module_refcount(mod) != 0) wait_for_zero_refcount(mod); |
df4b565e1 module: add MODUL... |
850 |
mutex_unlock(&module_mutex); |
25985edce Fix common misspe... |
851 |
/* Final destruction now no one is using it. */ |
df4b565e1 module: add MODUL... |
852 |
if (mod->exit != NULL) |
1da177e4c Linux-2.6.12-rc2 |
853 |
mod->exit(); |
df4b565e1 module: add MODUL... |
854 855 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); |
22a9d6456 async: Asynchrono... |
856 |
async_synchronize_full(); |
75676500f module: make lock... |
857 |
|
e14af7eeb debug: track and ... |
858 |
/* Store the name of the last unloaded module for diagnostic purposes */ |
efa5345e3 module: Fix gratu... |
859 |
strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module)); |
1da177e4c Linux-2.6.12-rc2 |
860 |
|
75676500f module: make lock... |
861 862 863 |
free_module(mod); return 0; out: |
6389a3851 [PATCH] kernel/mo... |
864 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
865 866 |
return ret; } |
d1e99d7ae module: fix warni... |
867 |
static inline void print_unload_info(struct seq_file *m, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
868 869 870 |
{ struct module_use *use; int printed_something = 0; |
bd77c0477 module: struct mo... |
871 |
seq_printf(m, " %lu ", module_refcount(mod)); |
1da177e4c Linux-2.6.12-rc2 |
872 873 874 |
/* Always include a trailing , so userspace can differentiate between this and the old multi-field proc format. */ |
2c02dfe7f module: Make the ... |
875 |
list_for_each_entry(use, &mod->source_list, source_list) { |
1da177e4c Linux-2.6.12-rc2 |
876 |
printed_something = 1; |
2c02dfe7f module: Make the ... |
877 |
seq_printf(m, "%s,", use->source->name); |
1da177e4c Linux-2.6.12-rc2 |
878 |
} |
1da177e4c Linux-2.6.12-rc2 |
879 880 881 882 883 884 885 886 887 888 889 890 |
if (mod->init != NULL && mod->exit == NULL) { printed_something = 1; seq_printf(m, "[permanent],"); } if (!printed_something) seq_printf(m, "-"); } void __symbol_put(const char *symbol) { struct module *owner; |
1da177e4c Linux-2.6.12-rc2 |
891 |
|
24da1cbff modules: remove m... |
892 |
preempt_disable(); |
414fd31b2 module: Make find... |
893 |
if (!find_symbol(symbol, &owner, NULL, true, false)) |
1da177e4c Linux-2.6.12-rc2 |
894 895 |
BUG(); module_put(owner); |
24da1cbff modules: remove m... |
896 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
897 898 |
} EXPORT_SYMBOL(__symbol_put); |
7d1d16e41 module: fix BUG_O... |
899 |
/* Note this assumes addr is a function, which it currently always is. */ |
1da177e4c Linux-2.6.12-rc2 |
900 901 |
void symbol_put_addr(void *addr) { |
5e3766138 [PATCH] symbol_pu... |
902 |
struct module *modaddr; |
7d1d16e41 module: fix BUG_O... |
903 |
unsigned long a = (unsigned long)dereference_function_descriptor(addr); |
1da177e4c Linux-2.6.12-rc2 |
904 |
|
7d1d16e41 module: fix BUG_O... |
905 |
if (core_kernel_text(a)) |
5e3766138 [PATCH] symbol_pu... |
906 |
return; |
1da177e4c Linux-2.6.12-rc2 |
907 |
|
a6e6abd57 module: remove mo... |
908 909 |
/* module_text_address is safe here: we're supposed to have reference * to module from symbol_get, so it can't go away. */ |
7d1d16e41 module: fix BUG_O... |
910 |
modaddr = __module_text_address(a); |
a6e6abd57 module: remove mo... |
911 |
BUG_ON(!modaddr); |
5e3766138 [PATCH] symbol_pu... |
912 |
module_put(modaddr); |
1da177e4c Linux-2.6.12-rc2 |
913 914 915 916 |
} EXPORT_SYMBOL_GPL(symbol_put_addr); static ssize_t show_refcnt(struct module_attribute *mattr, |
4befb026c module: change at... |
917 |
struct module_kobject *mk, char *buffer) |
1da177e4c Linux-2.6.12-rc2 |
918 |
{ |
bd77c0477 module: struct mo... |
919 920 |
return sprintf(buffer, "%lu ", module_refcount(mk->mod)); |
1da177e4c Linux-2.6.12-rc2 |
921 |
} |
cca3e7073 modules: sysfs - ... |
922 923 |
static struct module_attribute modinfo_refcnt = __ATTR(refcnt, 0444, show_refcnt, NULL); |
1da177e4c Linux-2.6.12-rc2 |
924 |
|
d53799be6 module: move __mo... |
925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 |
void __module_get(struct module *module) { if (module) { preempt_disable(); __this_cpu_inc(module->refptr->incs); trace_module_get(module, _RET_IP_); preempt_enable(); } } EXPORT_SYMBOL(__module_get); bool try_module_get(struct module *module) { bool ret = true; if (module) { preempt_disable(); if (likely(module_is_live(module))) { __this_cpu_inc(module->refptr->incs); trace_module_get(module, _RET_IP_); } else ret = false; preempt_enable(); } return ret; } EXPORT_SYMBOL(try_module_get); |
f6a570333 [PATCH] severing ... |
954 955 956 |
void module_put(struct module *module) { if (module) { |
e1783a240 module: Use this_... |
957 |
preempt_disable(); |
5fbfb18d7 Fix up possibly r... |
958 959 |
smp_wmb(); /* see comment in module_refcount */ __this_cpu_inc(module->refptr->decs); |
e1783a240 module: Use this_... |
960 |
|
ae832d1e0 tracing: Remove s... |
961 |
trace_module_put(module, _RET_IP_); |
f6a570333 [PATCH] severing ... |
962 963 964 |
/* Maybe they're waiting for us to drop reference? */ if (unlikely(!module_is_live(module))) wake_up_process(module->waiter); |
e1783a240 module: Use this_... |
965 |
preempt_enable(); |
f6a570333 [PATCH] severing ... |
966 967 968 |
} } EXPORT_SYMBOL(module_put); |
1da177e4c Linux-2.6.12-rc2 |
969 |
#else /* !CONFIG_MODULE_UNLOAD */ |
d1e99d7ae module: fix warni... |
970 |
static inline void print_unload_info(struct seq_file *m, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
971 972 973 974 975 976 977 978 |
{ /* We don't know the usage count, or what modules are using. */ seq_printf(m, " - -"); } static inline void module_unload_free(struct module *mod) { } |
9bea7f239 module: fix bne2 ... |
979 |
int ref_module(struct module *a, struct module *b) |
1da177e4c Linux-2.6.12-rc2 |
980 |
{ |
9bea7f239 module: fix bne2 ... |
981 |
return strong_try_module_get(b); |
1da177e4c Linux-2.6.12-rc2 |
982 |
} |
9bea7f239 module: fix bne2 ... |
983 |
EXPORT_SYMBOL_GPL(ref_module); |
1da177e4c Linux-2.6.12-rc2 |
984 |
|
9f85a4bbb module: refactor ... |
985 |
static inline int module_unload_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
986 |
{ |
9f85a4bbb module: refactor ... |
987 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
988 989 |
} #endif /* CONFIG_MODULE_UNLOAD */ |
53999bf34 error: implicit d... |
990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 |
static size_t module_flags_taint(struct module *mod, char *buf) { size_t l = 0; if (mod->taints & (1 << TAINT_PROPRIETARY_MODULE)) buf[l++] = 'P'; if (mod->taints & (1 << TAINT_OOT_MODULE)) buf[l++] = 'O'; if (mod->taints & (1 << TAINT_FORCED_MODULE)) buf[l++] = 'F'; if (mod->taints & (1 << TAINT_CRAP)) buf[l++] = 'C'; /* * TAINT_FORCED_RMMOD: could be added. * TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't * apply to modules. */ return l; } |
1f71740ab Driver core: show... |
1009 |
static ssize_t show_initstate(struct module_attribute *mattr, |
4befb026c module: change at... |
1010 |
struct module_kobject *mk, char *buffer) |
1f71740ab Driver core: show... |
1011 1012 |
{ const char *state = "unknown"; |
4befb026c module: change at... |
1013 |
switch (mk->mod->state) { |
1f71740ab Driver core: show... |
1014 1015 1016 1017 1018 1019 1020 1021 1022 |
case MODULE_STATE_LIVE: state = "live"; break; case MODULE_STATE_COMING: state = "coming"; break; case MODULE_STATE_GOING: state = "going"; break; |
0d21b0e34 module: add new s... |
1023 1024 |
default: BUG(); |
1f71740ab Driver core: show... |
1025 1026 1027 1028 |
} return sprintf(buffer, "%s ", state); } |
cca3e7073 modules: sysfs - ... |
1029 1030 |
static struct module_attribute modinfo_initstate = __ATTR(initstate, 0444, show_initstate, NULL); |
1f71740ab Driver core: show... |
1031 |
|
88bfa3247 module: add /sys/... |
1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 |
static ssize_t store_uevent(struct module_attribute *mattr, struct module_kobject *mk, const char *buffer, size_t count) { enum kobject_action action; if (kobject_action_type(buffer, count, &action) == 0) kobject_uevent(&mk->kobj, action); return count; } |
cca3e7073 modules: sysfs - ... |
1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 |
struct module_attribute module_uevent = __ATTR(uevent, 0200, NULL, store_uevent); static ssize_t show_coresize(struct module_attribute *mattr, struct module_kobject *mk, char *buffer) { return sprintf(buffer, "%u ", mk->mod->core_size); } static struct module_attribute modinfo_coresize = __ATTR(coresize, 0444, show_coresize, NULL); static ssize_t show_initsize(struct module_attribute *mattr, struct module_kobject *mk, char *buffer) { return sprintf(buffer, "%u ", mk->mod->init_size); } static struct module_attribute modinfo_initsize = __ATTR(initsize, 0444, show_initsize, NULL); static ssize_t show_taint(struct module_attribute *mattr, struct module_kobject *mk, char *buffer) { size_t l; l = module_flags_taint(mk->mod, buffer); buffer[l++] = ' '; return l; } static struct module_attribute modinfo_taint = __ATTR(taint, 0444, show_taint, NULL); |
88bfa3247 module: add /sys/... |
1078 |
|
03e88ae1b [PATCH] fix modul... |
1079 |
static struct module_attribute *modinfo_attrs[] = { |
cca3e7073 modules: sysfs - ... |
1080 |
&module_uevent, |
03e88ae1b [PATCH] fix modul... |
1081 1082 |
&modinfo_version, &modinfo_srcversion, |
cca3e7073 modules: sysfs - ... |
1083 1084 1085 1086 |
&modinfo_initstate, &modinfo_coresize, &modinfo_initsize, &modinfo_taint, |
03e88ae1b [PATCH] fix modul... |
1087 |
#ifdef CONFIG_MODULE_UNLOAD |
cca3e7073 modules: sysfs - ... |
1088 |
&modinfo_refcnt, |
03e88ae1b [PATCH] fix modul... |
1089 1090 1091 |
#endif NULL, }; |
1da177e4c Linux-2.6.12-rc2 |
1092 |
static const char vermagic[] = VERMAGIC_STRING; |
c6e665c8f module: clarify t... |
1093 |
static int try_to_force_load(struct module *mod, const char *reason) |
826e4506a Make forced modul... |
1094 1095 |
{ #ifdef CONFIG_MODULE_FORCE_LOAD |
25ddbb18a Make the taint fl... |
1096 |
if (!test_taint(TAINT_FORCED_MODULE)) |
c6e665c8f module: clarify t... |
1097 1098 1099 |
printk(KERN_WARNING "%s: %s: kernel tainted. ", mod->name, reason); |
373d4d099 taint: add explic... |
1100 |
add_taint_module(mod, TAINT_FORCED_MODULE, LOCKDEP_NOW_UNRELIABLE); |
826e4506a Make forced modul... |
1101 1102 1103 1104 1105 |
return 0; #else return -ENOEXEC; #endif } |
1da177e4c Linux-2.6.12-rc2 |
1106 |
#ifdef CONFIG_MODVERSIONS |
d4703aefd module: handle pp... |
1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 |
/* If the arch applies (non-zero) relocations to kernel kcrctab, unapply it. */ static unsigned long maybe_relocated(unsigned long crc, const struct module *crc_owner) { #ifdef ARCH_RELOCATES_KCRCTAB if (crc_owner == NULL) return crc - (unsigned long)reloc_start; #endif return crc; } |
1da177e4c Linux-2.6.12-rc2 |
1117 1118 1119 1120 |
static int check_version(Elf_Shdr *sechdrs, unsigned int versindex, const char *symname, struct module *mod, |
d4703aefd module: handle pp... |
1121 1122 |
const unsigned long *crc, const struct module *crc_owner) |
1da177e4c Linux-2.6.12-rc2 |
1123 1124 1125 1126 1127 1128 1129 |
{ unsigned int i, num_versions; struct modversion_info *versions; /* Exporting module didn't supply crcs? OK, we're already tainted. */ if (!crc) return 1; |
a5dd69707 module: be more p... |
1130 1131 1132 |
/* No versions at all? modprobe --force does this. */ if (versindex == 0) return try_to_force_load(mod, symname) == 0; |
1da177e4c Linux-2.6.12-rc2 |
1133 1134 1135 1136 1137 1138 1139 |
versions = (void *) sechdrs[versindex].sh_addr; num_versions = sechdrs[versindex].sh_size / sizeof(struct modversion_info); for (i = 0; i < num_versions; i++) { if (strcmp(versions[i].name, symname) != 0) continue; |
d4703aefd module: handle pp... |
1140 |
if (versions[i].crc == maybe_relocated(*crc, crc_owner)) |
1da177e4c Linux-2.6.12-rc2 |
1141 |
return 1; |
5e1241692 module: replace D... |
1142 1143 |
pr_debug("Found checksum %lX vs module %lX ", |
d4703aefd module: handle pp... |
1144 |
maybe_relocated(*crc, crc_owner), versions[i].crc); |
826e4506a Make forced modul... |
1145 |
goto bad_version; |
1da177e4c Linux-2.6.12-rc2 |
1146 |
} |
826e4506a Make forced modul... |
1147 |
|
a5dd69707 module: be more p... |
1148 1149 1150 1151 |
printk(KERN_WARNING "%s: no symbol version for %s ", mod->name, symname); return 0; |
826e4506a Make forced modul... |
1152 1153 1154 1155 1156 1157 |
bad_version: printk("%s: disagrees about version of symbol %s ", mod->name, symname); return 0; |
1da177e4c Linux-2.6.12-rc2 |
1158 1159 1160 1161 1162 1163 1164 |
} static inline int check_modstruct_version(Elf_Shdr *sechdrs, unsigned int versindex, struct module *mod) { const unsigned long *crc; |
1da177e4c Linux-2.6.12-rc2 |
1165 |
|
75676500f module: make lock... |
1166 1167 |
/* Since this should be found in kernel (which can't be removed), * no locking is necessary. */ |
6560dc160 module: use MODUL... |
1168 1169 |
if (!find_symbol(MODULE_SYMBOL_PREFIX "module_layout", NULL, &crc, true, false)) |
1da177e4c Linux-2.6.12-rc2 |
1170 |
BUG(); |
d4703aefd module: handle pp... |
1171 1172 |
return check_version(sechdrs, versindex, "module_layout", mod, crc, NULL); |
1da177e4c Linux-2.6.12-rc2 |
1173 |
} |
91e37a793 module: don't ign... |
1174 1175 1176 |
/* First part is kernel version, which we ignore if module has crcs. */ static inline int same_magic(const char *amagic, const char *bmagic, bool has_crcs) |
1da177e4c Linux-2.6.12-rc2 |
1177 |
{ |
91e37a793 module: don't ign... |
1178 1179 1180 1181 |
if (has_crcs) { amagic += strcspn(amagic, " "); bmagic += strcspn(bmagic, " "); } |
1da177e4c Linux-2.6.12-rc2 |
1182 1183 1184 1185 1186 1187 1188 |
return strcmp(amagic, bmagic) == 0; } #else static inline int check_version(Elf_Shdr *sechdrs, unsigned int versindex, const char *symname, struct module *mod, |
d4703aefd module: handle pp... |
1189 1190 |
const unsigned long *crc, const struct module *crc_owner) |
1da177e4c Linux-2.6.12-rc2 |
1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 |
{ return 1; } static inline int check_modstruct_version(Elf_Shdr *sechdrs, unsigned int versindex, struct module *mod) { return 1; } |
91e37a793 module: don't ign... |
1201 1202 |
static inline int same_magic(const char *amagic, const char *bmagic, bool has_crcs) |
1da177e4c Linux-2.6.12-rc2 |
1203 1204 1205 1206 |
{ return strcmp(amagic, bmagic) == 0; } #endif /* CONFIG_MODVERSIONS */ |
75676500f module: make lock... |
1207 |
/* Resolve a symbol for this module. I.e. if we find one, record usage. */ |
49668688d module: pass load... |
1208 1209 |
static const struct kernel_symbol *resolve_symbol(struct module *mod, const struct load_info *info, |
414fd31b2 module: Make find... |
1210 |
const char *name, |
9bea7f239 module: fix bne2 ... |
1211 |
char ownername[]) |
1da177e4c Linux-2.6.12-rc2 |
1212 1213 |
{ struct module *owner; |
414fd31b2 module: Make find... |
1214 |
const struct kernel_symbol *sym; |
1da177e4c Linux-2.6.12-rc2 |
1215 |
const unsigned long *crc; |
9bea7f239 module: fix bne2 ... |
1216 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
1217 |
|
75676500f module: make lock... |
1218 |
mutex_lock(&module_mutex); |
414fd31b2 module: Make find... |
1219 |
sym = find_symbol(name, &owner, &crc, |
25ddbb18a Make the taint fl... |
1220 |
!(mod->taints & (1 << TAINT_PROPRIETARY_MODULE)), true); |
9bea7f239 module: fix bne2 ... |
1221 1222 |
if (!sym) goto unlock; |
49668688d module: pass load... |
1223 1224 |
if (!check_version(info->sechdrs, info->index.vers, name, mod, crc, owner)) { |
9bea7f239 module: fix bne2 ... |
1225 1226 |
sym = ERR_PTR(-EINVAL); goto getname; |
1da177e4c Linux-2.6.12-rc2 |
1227 |
} |
9bea7f239 module: fix bne2 ... |
1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 |
err = ref_module(mod, owner); if (err) { sym = ERR_PTR(err); goto getname; } getname: /* We must make copy under the lock if we failed to get ref. */ strncpy(ownername, module_name(owner), MODULE_NAME_LEN); unlock: |
75676500f module: make lock... |
1239 |
mutex_unlock(&module_mutex); |
218ce7351 Revert "module: d... |
1240 |
return sym; |
1da177e4c Linux-2.6.12-rc2 |
1241 |
} |
49668688d module: pass load... |
1242 1243 1244 1245 |
static const struct kernel_symbol * resolve_symbol_wait(struct module *mod, const struct load_info *info, const char *name) |
9bea7f239 module: fix bne2 ... |
1246 1247 |
{ const struct kernel_symbol *ksym; |
49668688d module: pass load... |
1248 |
char owner[MODULE_NAME_LEN]; |
9bea7f239 module: fix bne2 ... |
1249 1250 |
if (wait_event_interruptible_timeout(module_wq, |
49668688d module: pass load... |
1251 1252 |
!IS_ERR(ksym = resolve_symbol(mod, info, name, owner)) || PTR_ERR(ksym) != -EBUSY, |
9bea7f239 module: fix bne2 ... |
1253 1254 1255 |
30 * HZ) <= 0) { printk(KERN_WARNING "%s: gave up waiting for init of module %s. ", |
49668688d module: pass load... |
1256 |
mod->name, owner); |
9bea7f239 module: fix bne2 ... |
1257 1258 1259 |
} return ksym; } |
1da177e4c Linux-2.6.12-rc2 |
1260 1261 1262 1263 |
/* * /sys/module/foo/sections stuff * J. Corbet <corbet@lwn.net> */ |
8f6d03781 module: sysfs cle... |
1264 |
#ifdef CONFIG_SYSFS |
10b465aaf modules: Skip emp... |
1265 |
|
8f6d03781 module: sysfs cle... |
1266 |
#ifdef CONFIG_KALLSYMS |
10b465aaf modules: Skip emp... |
1267 1268 1269 1270 |
static inline bool sect_empty(const Elf_Shdr *sect) { return !(sect->sh_flags & SHF_ALLOC) || sect->sh_size == 0; } |
a58730c42 module: make modu... |
1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 |
struct module_sect_attr { struct module_attribute mattr; char *name; unsigned long address; }; struct module_sect_attrs { struct attribute_group grp; unsigned int nsections; struct module_sect_attr attrs[0]; }; |
1da177e4c Linux-2.6.12-rc2 |
1284 |
static ssize_t module_sect_show(struct module_attribute *mattr, |
4befb026c module: change at... |
1285 |
struct module_kobject *mk, char *buf) |
1da177e4c Linux-2.6.12-rc2 |
1286 1287 1288 |
{ struct module_sect_attr *sattr = container_of(mattr, struct module_sect_attr, mattr); |
9f36e2c44 printk: use %pK f... |
1289 1290 |
return sprintf(buf, "0x%pK ", (void *)sattr->address); |
1da177e4c Linux-2.6.12-rc2 |
1291 |
} |
04b1db9fd [PATCH] /sys/modu... |
1292 1293 |
static void free_sect_attrs(struct module_sect_attrs *sect_attrs) { |
a58730c42 module: make modu... |
1294 |
unsigned int section; |
04b1db9fd [PATCH] /sys/modu... |
1295 1296 1297 1298 1299 |
for (section = 0; section < sect_attrs->nsections; section++) kfree(sect_attrs->attrs[section].name); kfree(sect_attrs); } |
8f6d03781 module: sysfs cle... |
1300 |
static void add_sect_attrs(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1301 1302 1303 1304 1305 |
{ unsigned int nloaded = 0, i, size[2]; struct module_sect_attrs *sect_attrs; struct module_sect_attr *sattr; struct attribute **gattr; |
22a8bdeb5 whitespace fixes:... |
1306 |
|
1da177e4c Linux-2.6.12-rc2 |
1307 |
/* Count loaded sections and allocate structures */ |
8f6d03781 module: sysfs cle... |
1308 1309 |
for (i = 0; i < info->hdr->e_shnum; i++) if (!sect_empty(&info->sechdrs[i])) |
1da177e4c Linux-2.6.12-rc2 |
1310 1311 1312 1313 1314 |
nloaded++; size[0] = ALIGN(sizeof(*sect_attrs) + nloaded * sizeof(sect_attrs->attrs[0]), sizeof(sect_attrs->grp.attrs[0])); size[1] = (nloaded + 1) * sizeof(sect_attrs->grp.attrs[0]); |
04b1db9fd [PATCH] /sys/modu... |
1315 1316 |
sect_attrs = kzalloc(size[0] + size[1], GFP_KERNEL); if (sect_attrs == NULL) |
1da177e4c Linux-2.6.12-rc2 |
1317 1318 1319 1320 1321 |
return; /* Setup section attributes. */ sect_attrs->grp.name = "sections"; sect_attrs->grp.attrs = (void *)sect_attrs + size[0]; |
04b1db9fd [PATCH] /sys/modu... |
1322 |
sect_attrs->nsections = 0; |
1da177e4c Linux-2.6.12-rc2 |
1323 1324 |
sattr = §_attrs->attrs[0]; gattr = §_attrs->grp.attrs[0]; |
8f6d03781 module: sysfs cle... |
1325 1326 1327 |
for (i = 0; i < info->hdr->e_shnum; i++) { Elf_Shdr *sec = &info->sechdrs[i]; if (sect_empty(sec)) |
35dead423 modules: don't ex... |
1328 |
continue; |
8f6d03781 module: sysfs cle... |
1329 1330 |
sattr->address = sec->sh_addr; sattr->name = kstrdup(info->secstrings + sec->sh_name, |
04b1db9fd [PATCH] /sys/modu... |
1331 1332 1333 1334 |
GFP_KERNEL); if (sattr->name == NULL) goto out; sect_attrs->nsections++; |
361795b1e sysfs: Use sysfs_... |
1335 |
sysfs_attr_init(&sattr->mattr.attr); |
1da177e4c Linux-2.6.12-rc2 |
1336 1337 1338 |
sattr->mattr.show = module_sect_show; sattr->mattr.store = NULL; sattr->mattr.attr.name = sattr->name; |
1da177e4c Linux-2.6.12-rc2 |
1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 |
sattr->mattr.attr.mode = S_IRUGO; *(gattr++) = &(sattr++)->mattr.attr; } *gattr = NULL; if (sysfs_create_group(&mod->mkobj.kobj, §_attrs->grp)) goto out; mod->sect_attrs = sect_attrs; return; out: |
04b1db9fd [PATCH] /sys/modu... |
1350 |
free_sect_attrs(sect_attrs); |
1da177e4c Linux-2.6.12-rc2 |
1351 1352 1353 1354 1355 1356 1357 1358 1359 |
} static void remove_sect_attrs(struct module *mod) { if (mod->sect_attrs) { sysfs_remove_group(&mod->mkobj.kobj, &mod->sect_attrs->grp); /* We are positive that no one is using any sect attrs * at this point. Deallocate immediately. */ |
04b1db9fd [PATCH] /sys/modu... |
1360 |
free_sect_attrs(mod->sect_attrs); |
1da177e4c Linux-2.6.12-rc2 |
1361 1362 1363 |
mod->sect_attrs = NULL; } } |
6d7601338 Add /sys/module/n... |
1364 1365 1366 1367 1368 1369 1370 1371 1372 |
/* * /sys/module/foo/notes/.section.name gives contents of SHT_NOTE sections. */ struct module_notes_attrs { struct kobject *dir; unsigned int notes; struct bin_attribute attrs[0]; }; |
2c3c8bea6 sysfs: add struct... |
1373 |
static ssize_t module_notes_read(struct file *filp, struct kobject *kobj, |
6d7601338 Add /sys/module/n... |
1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 |
struct bin_attribute *bin_attr, char *buf, loff_t pos, size_t count) { /* * The caller checked the pos and count against our size. */ memcpy(buf, bin_attr->private + pos, count); return count; } static void free_notes_attrs(struct module_notes_attrs *notes_attrs, unsigned int i) { if (notes_attrs->dir) { while (i-- > 0) sysfs_remove_bin_file(notes_attrs->dir, ¬es_attrs->attrs[i]); |
e94320939 modules: fix modu... |
1391 |
kobject_put(notes_attrs->dir); |
6d7601338 Add /sys/module/n... |
1392 1393 1394 |
} kfree(notes_attrs); } |
8f6d03781 module: sysfs cle... |
1395 |
static void add_notes_attrs(struct module *mod, const struct load_info *info) |
6d7601338 Add /sys/module/n... |
1396 1397 1398 1399 |
{ unsigned int notes, loaded, i; struct module_notes_attrs *notes_attrs; struct bin_attribute *nattr; |
ea6bff368 modules: Fix buil... |
1400 1401 1402 |
/* failed to create section attributes, so can't create notes */ if (!mod->sect_attrs) return; |
6d7601338 Add /sys/module/n... |
1403 1404 |
/* Count notes sections and allocate structures. */ notes = 0; |
8f6d03781 module: sysfs cle... |
1405 1406 1407 |
for (i = 0; i < info->hdr->e_shnum; i++) if (!sect_empty(&info->sechdrs[i]) && (info->sechdrs[i].sh_type == SHT_NOTE)) |
6d7601338 Add /sys/module/n... |
1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 |
++notes; if (notes == 0) return; notes_attrs = kzalloc(sizeof(*notes_attrs) + notes * sizeof(notes_attrs->attrs[0]), GFP_KERNEL); if (notes_attrs == NULL) return; notes_attrs->notes = notes; nattr = ¬es_attrs->attrs[0]; |
8f6d03781 module: sysfs cle... |
1421 1422 |
for (loaded = i = 0; i < info->hdr->e_shnum; ++i) { if (sect_empty(&info->sechdrs[i])) |
6d7601338 Add /sys/module/n... |
1423 |
continue; |
8f6d03781 module: sysfs cle... |
1424 |
if (info->sechdrs[i].sh_type == SHT_NOTE) { |
361795b1e sysfs: Use sysfs_... |
1425 |
sysfs_bin_attr_init(nattr); |
6d7601338 Add /sys/module/n... |
1426 1427 |
nattr->attr.name = mod->sect_attrs->attrs[loaded].name; nattr->attr.mode = S_IRUGO; |
8f6d03781 module: sysfs cle... |
1428 1429 |
nattr->size = info->sechdrs[i].sh_size; nattr->private = (void *) info->sechdrs[i].sh_addr; |
6d7601338 Add /sys/module/n... |
1430 1431 1432 1433 1434 |
nattr->read = module_notes_read; ++nattr; } ++loaded; } |
4ff6abff8 kobject: get rid ... |
1435 |
notes_attrs->dir = kobject_create_and_add("notes", &mod->mkobj.kobj); |
6d7601338 Add /sys/module/n... |
1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 |
if (!notes_attrs->dir) goto out; for (i = 0; i < notes; ++i) if (sysfs_create_bin_file(notes_attrs->dir, ¬es_attrs->attrs[i])) goto out; mod->notes_attrs = notes_attrs; return; out: free_notes_attrs(notes_attrs, i); } static void remove_notes_attrs(struct module *mod) { if (mod->notes_attrs) free_notes_attrs(mod->notes_attrs, mod->notes_attrs->notes); } |
1da177e4c Linux-2.6.12-rc2 |
1456 |
#else |
04b1db9fd [PATCH] /sys/modu... |
1457 |
|
8f6d03781 module: sysfs cle... |
1458 1459 |
static inline void add_sect_attrs(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1460 1461 1462 1463 1464 1465 |
{ } static inline void remove_sect_attrs(struct module *mod) { } |
6d7601338 Add /sys/module/n... |
1466 |
|
8f6d03781 module: sysfs cle... |
1467 1468 |
static inline void add_notes_attrs(struct module *mod, const struct load_info *info) |
6d7601338 Add /sys/module/n... |
1469 1470 1471 1472 1473 1474 |
{ } static inline void remove_notes_attrs(struct module *mod) { } |
8f6d03781 module: sysfs cle... |
1475 |
#endif /* CONFIG_KALLSYMS */ |
1da177e4c Linux-2.6.12-rc2 |
1476 |
|
80a3d1bb4 module: move sysf... |
1477 1478 1479 1480 1481 |
static void add_usage_links(struct module *mod) { #ifdef CONFIG_MODULE_UNLOAD struct module_use *use; int nowarn; |
75676500f module: make lock... |
1482 |
mutex_lock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1483 1484 1485 1486 |
list_for_each_entry(use, &mod->target_list, target_list) { nowarn = sysfs_create_link(use->target->holders_dir, &mod->mkobj.kobj, mod->name); } |
75676500f module: make lock... |
1487 |
mutex_unlock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1488 1489 1490 1491 1492 1493 1494 |
#endif } static void del_usage_links(struct module *mod) { #ifdef CONFIG_MODULE_UNLOAD struct module_use *use; |
75676500f module: make lock... |
1495 |
mutex_lock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1496 1497 |
list_for_each_entry(use, &mod->target_list, target_list) sysfs_remove_link(use->target->holders_dir, mod->name); |
75676500f module: make lock... |
1498 |
mutex_unlock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1499 1500 |
#endif } |
6407ebb27 module: Make modu... |
1501 |
static int module_add_modinfo_attrs(struct module *mod) |
c988d2b28 [PATCH] modules: ... |
1502 1503 |
{ struct module_attribute *attr; |
03e88ae1b [PATCH] fix modul... |
1504 |
struct module_attribute *temp_attr; |
c988d2b28 [PATCH] modules: ... |
1505 1506 |
int error = 0; int i; |
03e88ae1b [PATCH] fix modul... |
1507 1508 1509 1510 1511 1512 1513 |
mod->modinfo_attrs = kzalloc((sizeof(struct module_attribute) * (ARRAY_SIZE(modinfo_attrs) + 1)), GFP_KERNEL); if (!mod->modinfo_attrs) return -ENOMEM; temp_attr = mod->modinfo_attrs; |
c988d2b28 [PATCH] modules: ... |
1514 1515 |
for (i = 0; (attr = modinfo_attrs[i]) && !error; i++) { if (!attr->test || |
03e88ae1b [PATCH] fix modul... |
1516 1517 |
(attr->test && attr->test(mod))) { memcpy(temp_attr, attr, sizeof(*temp_attr)); |
361795b1e sysfs: Use sysfs_... |
1518 |
sysfs_attr_init(&temp_attr->attr); |
03e88ae1b [PATCH] fix modul... |
1519 1520 1521 |
error = sysfs_create_file(&mod->mkobj.kobj,&temp_attr->attr); ++temp_attr; } |
c988d2b28 [PATCH] modules: ... |
1522 1523 1524 |
} return error; } |
6407ebb27 module: Make modu... |
1525 |
static void module_remove_modinfo_attrs(struct module *mod) |
c988d2b28 [PATCH] modules: ... |
1526 1527 1528 |
{ struct module_attribute *attr; int i; |
03e88ae1b [PATCH] fix modul... |
1529 1530 1531 1532 |
for (i = 0; (attr = &mod->modinfo_attrs[i]); i++) { /* pick a field to test for end of list */ if (!attr->attr.name) break; |
c988d2b28 [PATCH] modules: ... |
1533 |
sysfs_remove_file(&mod->mkobj.kobj,&attr->attr); |
03e88ae1b [PATCH] fix modul... |
1534 1535 |
if (attr->free) attr->free(mod); |
c988d2b28 [PATCH] modules: ... |
1536 |
} |
03e88ae1b [PATCH] fix modul... |
1537 |
kfree(mod->modinfo_attrs); |
c988d2b28 [PATCH] modules: ... |
1538 |
} |
1da177e4c Linux-2.6.12-rc2 |
1539 |
|
6407ebb27 module: Make modu... |
1540 |
static int mod_sysfs_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1541 1542 |
{ int err; |
6494a93d5 Module: check to ... |
1543 |
struct kobject *kobj; |
1da177e4c Linux-2.6.12-rc2 |
1544 |
|
823bccfc4 remove "struct su... |
1545 1546 1547 |
if (!module_sysfs_initialized) { printk(KERN_ERR "%s: module sysfs not initialized ", |
1cc5f7142 [PATCH] load_modu... |
1548 1549 1550 1551 |
mod->name); err = -EINVAL; goto out; } |
6494a93d5 Module: check to ... |
1552 1553 1554 1555 1556 1557 1558 1559 1560 |
kobj = kset_find_obj(module_kset, mod->name); if (kobj) { printk(KERN_ERR "%s: module is already loaded ", mod->name); kobject_put(kobj); err = -EINVAL; goto out; } |
1da177e4c Linux-2.6.12-rc2 |
1561 |
mod->mkobj.mod = mod; |
e17e0f51a Driver core: show... |
1562 |
|
ac3c8141f Kobject: convert ... |
1563 1564 1565 1566 1567 1568 |
memset(&mod->mkobj.kobj, 0, sizeof(mod->mkobj.kobj)); mod->mkobj.kobj.kset = module_kset; err = kobject_init_and_add(&mod->mkobj.kobj, &module_ktype, NULL, "%s", mod->name); if (err) kobject_put(&mod->mkobj.kobj); |
270a6c4ca /sys/modules/*/ho... |
1569 |
|
97c146ef0 sysfs: fix /sys/m... |
1570 |
/* delay uevent until full sysfs population */ |
270a6c4ca /sys/modules/*/ho... |
1571 1572 1573 |
out: return err; } |
6407ebb27 module: Make modu... |
1574 |
static int mod_sysfs_setup(struct module *mod, |
8f6d03781 module: sysfs cle... |
1575 |
const struct load_info *info, |
270a6c4ca /sys/modules/*/ho... |
1576 1577 1578 1579 |
struct kernel_param *kparam, unsigned int num_params) { int err; |
80a3d1bb4 module: move sysf... |
1580 1581 1582 |
err = mod_sysfs_init(mod); if (err) goto out; |
4ff6abff8 kobject: get rid ... |
1583 |
mod->holders_dir = kobject_create_and_add("holders", &mod->mkobj.kobj); |
240936e18 mod_sysfs_setup()... |
1584 1585 |
if (!mod->holders_dir) { err = -ENOMEM; |
270a6c4ca /sys/modules/*/ho... |
1586 |
goto out_unreg; |
240936e18 mod_sysfs_setup()... |
1587 |
} |
270a6c4ca /sys/modules/*/ho... |
1588 |
|
1da177e4c Linux-2.6.12-rc2 |
1589 1590 |
err = module_param_sysfs_setup(mod, kparam, num_params); if (err) |
270a6c4ca /sys/modules/*/ho... |
1591 |
goto out_unreg_holders; |
1da177e4c Linux-2.6.12-rc2 |
1592 |
|
c988d2b28 [PATCH] modules: ... |
1593 1594 |
err = module_add_modinfo_attrs(mod); if (err) |
e17e0f51a Driver core: show... |
1595 |
goto out_unreg_param; |
c988d2b28 [PATCH] modules: ... |
1596 |
|
80a3d1bb4 module: move sysf... |
1597 |
add_usage_links(mod); |
8f6d03781 module: sysfs cle... |
1598 1599 |
add_sect_attrs(mod, info); add_notes_attrs(mod, info); |
80a3d1bb4 module: move sysf... |
1600 |
|
e17e0f51a Driver core: show... |
1601 |
kobject_uevent(&mod->mkobj.kobj, KOBJ_ADD); |
1da177e4c Linux-2.6.12-rc2 |
1602 |
return 0; |
e17e0f51a Driver core: show... |
1603 1604 |
out_unreg_param: module_param_sysfs_remove(mod); |
270a6c4ca /sys/modules/*/ho... |
1605 |
out_unreg_holders: |
78a2d906b Kobject: convert ... |
1606 |
kobject_put(mod->holders_dir); |
270a6c4ca /sys/modules/*/ho... |
1607 |
out_unreg: |
e17e0f51a Driver core: show... |
1608 |
kobject_put(&mod->mkobj.kobj); |
80a3d1bb4 module: move sysf... |
1609 |
out: |
1da177e4c Linux-2.6.12-rc2 |
1610 1611 |
return err; } |
34e4e2fef modules: proper c... |
1612 1613 1614 |
static void mod_sysfs_fini(struct module *mod) { |
8f6d03781 module: sysfs cle... |
1615 1616 |
remove_notes_attrs(mod); remove_sect_attrs(mod); |
34e4e2fef modules: proper c... |
1617 1618 |
kobject_put(&mod->mkobj.kobj); } |
8f6d03781 module: sysfs cle... |
1619 |
#else /* !CONFIG_SYSFS */ |
34e4e2fef modules: proper c... |
1620 |
|
8f6d03781 module: sysfs cle... |
1621 1622 |
static int mod_sysfs_setup(struct module *mod, const struct load_info *info, |
6407ebb27 module: Make modu... |
1623 1624 1625 1626 1627 |
struct kernel_param *kparam, unsigned int num_params) { return 0; } |
34e4e2fef modules: proper c... |
1628 1629 1630 |
static void mod_sysfs_fini(struct module *mod) { } |
36b0360d1 module: fix sysfs... |
1631 1632 1633 |
static void module_remove_modinfo_attrs(struct module *mod) { } |
80a3d1bb4 module: move sysf... |
1634 1635 1636 |
static void del_usage_links(struct module *mod) { } |
34e4e2fef modules: proper c... |
1637 |
#endif /* CONFIG_SYSFS */ |
1da177e4c Linux-2.6.12-rc2 |
1638 |
|
36b0360d1 module: fix sysfs... |
1639 |
static void mod_sysfs_teardown(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1640 |
{ |
80a3d1bb4 module: move sysf... |
1641 |
del_usage_links(mod); |
c988d2b28 [PATCH] modules: ... |
1642 |
module_remove_modinfo_attrs(mod); |
1da177e4c Linux-2.6.12-rc2 |
1643 |
module_param_sysfs_remove(mod); |
78a2d906b Kobject: convert ... |
1644 1645 |
kobject_put(mod->mkobj.drivers_dir); kobject_put(mod->holders_dir); |
34e4e2fef modules: proper c... |
1646 |
mod_sysfs_fini(mod); |
1da177e4c Linux-2.6.12-rc2 |
1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 |
} /* * unlink the module with the whole machine is stopped with interrupts off * - this defends against kallsyms not taking locks */ static int __unlink_module(void *_mod) { struct module *mod = _mod; list_del(&mod->list); |
5336377d6 modules: Fix modu... |
1657 |
module_bug_cleanup(mod); |
1da177e4c Linux-2.6.12-rc2 |
1658 1659 |
return 0; } |
84e1c6bb3 x86: Add RO/NX pr... |
1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 |
#ifdef CONFIG_DEBUG_SET_MODULE_RONX /* * LKM RO/NX protection: protect module's text/ro-data * from modification and any data from execution. */ void set_page_attributes(void *start, void *end, int (*set)(unsigned long start, int num_pages)) { unsigned long begin_pfn = PFN_DOWN((unsigned long)start); unsigned long end_pfn = PFN_DOWN((unsigned long)end); if (end_pfn > begin_pfn) set(begin_pfn << PAGE_SHIFT, end_pfn - begin_pfn); } static void set_section_ro_nx(void *base, unsigned long text_size, unsigned long ro_size, unsigned long total_size) { /* begin and end PFNs of the current subsection */ unsigned long begin_pfn; unsigned long end_pfn; /* * Set RO for module text and RO-data: * - Always protect first page. * - Do not protect last partial page. */ if (ro_size > 0) set_page_attributes(base, base + ro_size, set_memory_ro); /* * Set NX permissions for module data: * - Do not protect first partial page. * - Always protect last page. */ if (total_size > text_size) { begin_pfn = PFN_UP((unsigned long)base + text_size); end_pfn = PFN_UP((unsigned long)base + total_size); if (end_pfn > begin_pfn) set_memory_nx(begin_pfn << PAGE_SHIFT, end_pfn - begin_pfn); } } |
01526ed08 module: split uns... |
1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 |
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); |
84e1c6bb3 x86: Add RO/NX pr... |
1721 1722 1723 |
} /* Iterate through all modules and set each module's text as RW */ |
5d05c7084 minor ANSI protot... |
1724 |
void set_all_modules_text_rw(void) |
84e1c6bb3 x86: Add RO/NX pr... |
1725 1726 1727 1728 1729 |
{ struct module *mod; mutex_lock(&module_mutex); list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
1730 1731 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
84e1c6bb3 x86: Add RO/NX pr... |
1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 |
if ((mod->module_core) && (mod->core_text_size)) { set_page_attributes(mod->module_core, mod->module_core + mod->core_text_size, set_memory_rw); } if ((mod->module_init) && (mod->init_text_size)) { set_page_attributes(mod->module_init, mod->module_init + mod->init_text_size, set_memory_rw); } } mutex_unlock(&module_mutex); } /* Iterate through all modules and set each module's text as RO */ |
5d05c7084 minor ANSI protot... |
1747 |
void set_all_modules_text_ro(void) |
84e1c6bb3 x86: Add RO/NX pr... |
1748 1749 1750 1751 1752 |
{ struct module *mod; mutex_lock(&module_mutex); list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
1753 1754 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
84e1c6bb3 x86: Add RO/NX pr... |
1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 |
if ((mod->module_core) && (mod->core_text_size)) { set_page_attributes(mod->module_core, mod->module_core + mod->core_text_size, set_memory_ro); } if ((mod->module_init) && (mod->init_text_size)) { set_page_attributes(mod->module_init, mod->module_init + mod->init_text_size, set_memory_ro); } } mutex_unlock(&module_mutex); } #else static inline void set_section_ro_nx(void *base, unsigned long text_size, unsigned long ro_size, unsigned long total_size) { } |
01526ed08 module: split uns... |
1770 1771 |
static void unset_module_core_ro_nx(struct module *mod) { } static void unset_module_init_ro_nx(struct module *mod) { } |
84e1c6bb3 x86: Add RO/NX pr... |
1772 |
#endif |
74e08fcf7 modules: add defa... |
1773 1774 1775 1776 1777 1778 1779 1780 |
void __weak module_free(struct module *mod, void *module_region) { vfree(module_region); } void __weak module_arch_cleanup(struct module *mod) { } |
75676500f module: make lock... |
1781 |
/* Free a module, remove from lists, etc. */ |
1da177e4c Linux-2.6.12-rc2 |
1782 1783 |
static void free_module(struct module *mod) { |
7ead8b831 tracing/events: A... |
1784 |
trace_module_free(mod); |
1da177e4c Linux-2.6.12-rc2 |
1785 |
/* Delete from various lists */ |
75676500f module: make lock... |
1786 |
mutex_lock(&module_mutex); |
9b1a4d383 stop_machine: Wea... |
1787 |
stop_machine(__unlink_module, mod, NULL); |
75676500f module: make lock... |
1788 |
mutex_unlock(&module_mutex); |
36b0360d1 module: fix sysfs... |
1789 |
mod_sysfs_teardown(mod); |
1da177e4c Linux-2.6.12-rc2 |
1790 |
|
b82bab4bb dynamic debug: mo... |
1791 1792 |
/* Remove dynamic debug info */ ddebug_remove_module(mod->name); |
1da177e4c Linux-2.6.12-rc2 |
1793 1794 1795 1796 1797 |
/* Arch-specific cleanup. */ module_arch_cleanup(mod); /* Module unload stuff */ module_unload_free(mod); |
e180a6b77 param: fix charp ... |
1798 1799 |
/* Free any allocated parameters. */ destroy_params(mod->kp, mod->num_kp); |
1da177e4c Linux-2.6.12-rc2 |
1800 |
/* This may be NULL, but that's OK */ |
01526ed08 module: split uns... |
1801 |
unset_module_init_ro_nx(mod); |
1da177e4c Linux-2.6.12-rc2 |
1802 1803 |
module_free(mod, mod->module_init); kfree(mod->args); |
259354dea module: encapsula... |
1804 |
percpu_modfree(mod); |
9f85a4bbb module: refactor ... |
1805 |
|
fbb9ce953 [PATCH] lockdep: ... |
1806 1807 |
/* Free lock-classes: */ lockdep_free_key_range(mod->module_core, mod->core_size); |
1da177e4c Linux-2.6.12-rc2 |
1808 |
/* Finally, free the core (containing the module structure) */ |
01526ed08 module: split uns... |
1809 |
unset_module_core_ro_nx(mod); |
1da177e4c Linux-2.6.12-rc2 |
1810 |
module_free(mod, mod->module_core); |
eb8cdec4a nommu: add suppor... |
1811 1812 1813 1814 |
#ifdef CONFIG_MPU update_protections(current->mm); #endif |
1da177e4c Linux-2.6.12-rc2 |
1815 1816 1817 1818 1819 |
} void *__symbol_get(const char *symbol) { struct module *owner; |
414fd31b2 module: Make find... |
1820 |
const struct kernel_symbol *sym; |
1da177e4c Linux-2.6.12-rc2 |
1821 |
|
24da1cbff modules: remove m... |
1822 |
preempt_disable(); |
414fd31b2 module: Make find... |
1823 1824 1825 |
sym = find_symbol(symbol, &owner, NULL, true, true); if (sym && strong_try_module_get(owner)) sym = NULL; |
24da1cbff modules: remove m... |
1826 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
1827 |
|
414fd31b2 module: Make find... |
1828 |
return sym ? (void *)sym->value : NULL; |
1da177e4c Linux-2.6.12-rc2 |
1829 1830 |
} EXPORT_SYMBOL_GPL(__symbol_get); |
eea8b54dc [PATCH] modules: ... |
1831 1832 |
/* * Ensure that an exported symbol [global namespace] does not already exist |
02a3e59a0 Fix minor typoes ... |
1833 |
* in the kernel or in some other module's exported symbol table. |
be593f4ce module: verify_ex... |
1834 1835 |
* * You must hold the module_mutex. |
eea8b54dc [PATCH] modules: ... |
1836 1837 1838 |
*/ static int verify_export_symbols(struct module *mod) { |
b211104d1 module: Enhance v... |
1839 |
unsigned int i; |
eea8b54dc [PATCH] modules: ... |
1840 |
struct module *owner; |
b211104d1 module: Enhance v... |
1841 1842 1843 1844 1845 1846 1847 1848 |
const struct kernel_symbol *s; struct { const struct kernel_symbol *sym; unsigned int num; } arr[] = { { mod->syms, mod->num_syms }, { mod->gpl_syms, mod->num_gpl_syms }, { mod->gpl_future_syms, mod->num_gpl_future_syms }, |
f7f5b6755 Shrink struct mod... |
1849 |
#ifdef CONFIG_UNUSED_SYMBOLS |
b211104d1 module: Enhance v... |
1850 1851 |
{ mod->unused_syms, mod->num_unused_syms }, { mod->unused_gpl_syms, mod->num_unused_gpl_syms }, |
f7f5b6755 Shrink struct mod... |
1852 |
#endif |
b211104d1 module: Enhance v... |
1853 |
}; |
eea8b54dc [PATCH] modules: ... |
1854 |
|
b211104d1 module: Enhance v... |
1855 1856 |
for (i = 0; i < ARRAY_SIZE(arr); i++) { for (s = arr[i].sym; s < arr[i].sym + arr[i].num; s++) { |
be593f4ce module: verify_ex... |
1857 |
if (find_symbol(s->name, &owner, NULL, true, false)) { |
b211104d1 module: Enhance v... |
1858 1859 1860 1861 1862 1863 1864 |
printk(KERN_ERR "%s: exports duplicate symbol %s" " (owned by %s) ", mod->name, s->name, module_name(owner)); return -ENOEXEC; } |
eea8b54dc [PATCH] modules: ... |
1865 |
} |
b211104d1 module: Enhance v... |
1866 1867 |
} return 0; |
eea8b54dc [PATCH] modules: ... |
1868 |
} |
9a4b9708f module: fix and e... |
1869 |
/* Change all symbols so that st_value encodes the pointer directly. */ |
49668688d module: pass load... |
1870 1871 1872 1873 |
static int simplify_symbols(struct module *mod, const struct load_info *info) { Elf_Shdr *symsec = &info->sechdrs[info->index.sym]; Elf_Sym *sym = (void *)symsec->sh_addr; |
1da177e4c Linux-2.6.12-rc2 |
1874 |
unsigned long secbase; |
49668688d module: pass load... |
1875 |
unsigned int i; |
1da177e4c Linux-2.6.12-rc2 |
1876 |
int ret = 0; |
414fd31b2 module: Make find... |
1877 |
const struct kernel_symbol *ksym; |
1da177e4c Linux-2.6.12-rc2 |
1878 |
|
49668688d module: pass load... |
1879 1880 |
for (i = 1; i < symsec->sh_size / sizeof(Elf_Sym); i++) { const char *name = info->strtab + sym[i].st_name; |
1da177e4c Linux-2.6.12-rc2 |
1881 1882 1883 1884 |
switch (sym[i].st_shndx) { case SHN_COMMON: /* We compiled with -fno-common. These are not supposed to happen. */ |
5e1241692 module: replace D... |
1885 1886 |
pr_debug("Common symbol: %s ", name); |
1da177e4c Linux-2.6.12-rc2 |
1887 1888 1889 1890 1891 1892 1893 1894 |
printk("%s: please compile with -fno-common ", mod->name); ret = -ENOEXEC; break; case SHN_ABS: /* Don't need to do anything */ |
5e1241692 module: replace D... |
1895 1896 |
pr_debug("Absolute symbol: 0x%08lx ", |
1da177e4c Linux-2.6.12-rc2 |
1897 1898 1899 1900 |
(long)sym[i].st_value); break; case SHN_UNDEF: |
49668688d module: pass load... |
1901 |
ksym = resolve_symbol_wait(mod, info, name); |
1da177e4c Linux-2.6.12-rc2 |
1902 |
/* Ok if resolved. */ |
9bea7f239 module: fix bne2 ... |
1903 |
if (ksym && !IS_ERR(ksym)) { |
414fd31b2 module: Make find... |
1904 |
sym[i].st_value = ksym->value; |
1da177e4c Linux-2.6.12-rc2 |
1905 |
break; |
414fd31b2 module: Make find... |
1906 |
} |
1da177e4c Linux-2.6.12-rc2 |
1907 |
/* Ok if weak. */ |
9bea7f239 module: fix bne2 ... |
1908 |
if (!ksym && ELF_ST_BIND(sym[i].st_info) == STB_WEAK) |
1da177e4c Linux-2.6.12-rc2 |
1909 |
break; |
9bea7f239 module: fix bne2 ... |
1910 1911 |
printk(KERN_WARNING "%s: Unknown symbol %s (err %li) ", |
49668688d module: pass load... |
1912 |
mod->name, name, PTR_ERR(ksym)); |
9bea7f239 module: fix bne2 ... |
1913 |
ret = PTR_ERR(ksym) ?: -ENOENT; |
1da177e4c Linux-2.6.12-rc2 |
1914 1915 1916 1917 |
break; default: /* Divert to percpu allocation if a percpu var. */ |
49668688d module: pass load... |
1918 |
if (sym[i].st_shndx == info->index.pcpu) |
259354dea module: encapsula... |
1919 |
secbase = (unsigned long)mod_percpu(mod); |
1da177e4c Linux-2.6.12-rc2 |
1920 |
else |
49668688d module: pass load... |
1921 |
secbase = info->sechdrs[sym[i].st_shndx].sh_addr; |
1da177e4c Linux-2.6.12-rc2 |
1922 1923 1924 1925 1926 1927 1928 |
sym[i].st_value += secbase; break; } } return ret; } |
49668688d module: pass load... |
1929 |
static int apply_relocations(struct module *mod, const struct load_info *info) |
22e268ebe module: refactor ... |
1930 1931 1932 1933 1934 |
{ unsigned int i; int err = 0; /* Now do relocations. */ |
49668688d module: pass load... |
1935 1936 |
for (i = 1; i < info->hdr->e_shnum; i++) { unsigned int infosec = info->sechdrs[i].sh_info; |
22e268ebe module: refactor ... |
1937 1938 |
/* Not a valid relocation section? */ |
49668688d module: pass load... |
1939 |
if (infosec >= info->hdr->e_shnum) |
22e268ebe module: refactor ... |
1940 1941 1942 |
continue; /* Don't bother with non-allocated sections */ |
49668688d module: pass load... |
1943 |
if (!(info->sechdrs[infosec].sh_flags & SHF_ALLOC)) |
22e268ebe module: refactor ... |
1944 |
continue; |
49668688d module: pass load... |
1945 1946 1947 1948 1949 1950 |
if (info->sechdrs[i].sh_type == SHT_REL) err = apply_relocate(info->sechdrs, info->strtab, info->index.sym, i, mod); else if (info->sechdrs[i].sh_type == SHT_RELA) err = apply_relocate_add(info->sechdrs, info->strtab, info->index.sym, i, mod); |
22e268ebe module: refactor ... |
1951 1952 1953 1954 1955 |
if (err < 0) break; } return err; } |
088af9a6e module: fix modul... |
1956 1957 1958 1959 1960 1961 1962 |
/* Additional bytes needed by arch in front of individual sections */ unsigned int __weak arch_mod_section_prepend(struct module *mod, unsigned int section) { /* default implementation just returns zero */ return 0; } |
1da177e4c Linux-2.6.12-rc2 |
1963 |
/* Update size with this section: return offset. */ |
088af9a6e module: fix modul... |
1964 1965 |
static long get_offset(struct module *mod, unsigned int *size, Elf_Shdr *sechdr, unsigned int section) |
1da177e4c Linux-2.6.12-rc2 |
1966 1967 |
{ long ret; |
088af9a6e module: fix modul... |
1968 |
*size += arch_mod_section_prepend(mod, section); |
1da177e4c Linux-2.6.12-rc2 |
1969 1970 1971 1972 1973 1974 1975 1976 1977 |
ret = ALIGN(*size, sechdr->sh_addralign ?: 1); *size = ret + sechdr->sh_size; return ret; } /* Lay out the SHF_ALLOC sections in a way not dissimilar to how ld might -- code, read-only data, read-write data, small data. Tally sizes, and place the offsets into sh_entsize fields: high bit means it belongs in init. */ |
49668688d module: pass load... |
1978 |
static void layout_sections(struct module *mod, struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 |
{ static unsigned long const masks[][2] = { /* NOTE: all executable code must be the first section * in this array; otherwise modify the text_size * finder in the two loops below */ { SHF_EXECINSTR | SHF_ALLOC, ARCH_SHF_SMALL }, { SHF_ALLOC, SHF_WRITE | ARCH_SHF_SMALL }, { SHF_WRITE | SHF_ALLOC, ARCH_SHF_SMALL }, { ARCH_SHF_SMALL | SHF_ALLOC, 0 } }; unsigned int m, i; |
49668688d module: pass load... |
1990 1991 |
for (i = 0; i < info->hdr->e_shnum; i++) info->sechdrs[i].sh_entsize = ~0UL; |
1da177e4c Linux-2.6.12-rc2 |
1992 |
|
5e1241692 module: replace D... |
1993 1994 |
pr_debug("Core section allocation order: "); |
1da177e4c Linux-2.6.12-rc2 |
1995 |
for (m = 0; m < ARRAY_SIZE(masks); ++m) { |
49668688d module: pass load... |
1996 1997 1998 |
for (i = 0; i < info->hdr->e_shnum; ++i) { Elf_Shdr *s = &info->sechdrs[i]; const char *sname = info->secstrings + s->sh_name; |
1da177e4c Linux-2.6.12-rc2 |
1999 2000 2001 2002 |
if ((s->sh_flags & masks[m][0]) != masks[m][0] || (s->sh_flags & masks[m][1]) || s->sh_entsize != ~0UL |
49668688d module: pass load... |
2003 |
|| strstarts(sname, ".init")) |
1da177e4c Linux-2.6.12-rc2 |
2004 |
continue; |
088af9a6e module: fix modul... |
2005 |
s->sh_entsize = get_offset(mod, &mod->core_size, s, i); |
5e1241692 module: replace D... |
2006 2007 |
pr_debug("\t%s ", sname); |
1da177e4c Linux-2.6.12-rc2 |
2008 |
} |
84e1c6bb3 x86: Add RO/NX pr... |
2009 2010 2011 |
switch (m) { case 0: /* executable */ mod->core_size = debug_align(mod->core_size); |
1da177e4c Linux-2.6.12-rc2 |
2012 |
mod->core_text_size = mod->core_size; |
84e1c6bb3 x86: Add RO/NX pr... |
2013 2014 2015 2016 2017 2018 2019 2020 2021 |
break; case 1: /* RO: text and ro-data */ mod->core_size = debug_align(mod->core_size); mod->core_ro_size = mod->core_size; break; case 3: /* whole core */ mod->core_size = debug_align(mod->core_size); break; } |
1da177e4c Linux-2.6.12-rc2 |
2022 |
} |
5e1241692 module: replace D... |
2023 2024 |
pr_debug("Init section allocation order: "); |
1da177e4c Linux-2.6.12-rc2 |
2025 |
for (m = 0; m < ARRAY_SIZE(masks); ++m) { |
49668688d module: pass load... |
2026 2027 2028 |
for (i = 0; i < info->hdr->e_shnum; ++i) { Elf_Shdr *s = &info->sechdrs[i]; const char *sname = info->secstrings + s->sh_name; |
1da177e4c Linux-2.6.12-rc2 |
2029 2030 2031 2032 |
if ((s->sh_flags & masks[m][0]) != masks[m][0] || (s->sh_flags & masks[m][1]) || s->sh_entsize != ~0UL |
49668688d module: pass load... |
2033 |
|| !strstarts(sname, ".init")) |
1da177e4c Linux-2.6.12-rc2 |
2034 |
continue; |
088af9a6e module: fix modul... |
2035 |
s->sh_entsize = (get_offset(mod, &mod->init_size, s, i) |
1da177e4c Linux-2.6.12-rc2 |
2036 |
| INIT_OFFSET_MASK); |
5e1241692 module: replace D... |
2037 2038 |
pr_debug("\t%s ", sname); |
1da177e4c Linux-2.6.12-rc2 |
2039 |
} |
84e1c6bb3 x86: Add RO/NX pr... |
2040 2041 2042 |
switch (m) { case 0: /* executable */ mod->init_size = debug_align(mod->init_size); |
1da177e4c Linux-2.6.12-rc2 |
2043 |
mod->init_text_size = mod->init_size; |
84e1c6bb3 x86: Add RO/NX pr... |
2044 2045 2046 2047 2048 2049 2050 2051 2052 |
break; case 1: /* RO: text and ro-data */ mod->init_size = debug_align(mod->init_size); mod->init_ro_size = mod->init_size; break; case 3: /* whole init */ mod->init_size = debug_align(mod->init_size); break; } |
1da177e4c Linux-2.6.12-rc2 |
2053 2054 |
} } |
1da177e4c Linux-2.6.12-rc2 |
2055 2056 2057 2058 |
static void set_license(struct module *mod, const char *license) { if (!license) license = "unspecified"; |
fa3ba2e81 [PATCH] fix Modul... |
2059 |
if (!license_is_gpl_compatible(license)) { |
25ddbb18a Make the taint fl... |
2060 |
if (!test_taint(TAINT_PROPRIETARY_MODULE)) |
1d4d26276 [PATCH] Add missi... |
2061 |
printk(KERN_WARNING "%s: module license '%s' taints " |
fa3ba2e81 [PATCH] fix Modul... |
2062 2063 |
"kernel. ", mod->name, license); |
373d4d099 taint: add explic... |
2064 2065 |
add_taint_module(mod, TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
1da177e4c Linux-2.6.12-rc2 |
2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 |
} } /* Parse tag=value strings from .modinfo section */ static char *next_string(char *string, unsigned long *secsize) { /* Skip non-zero chars */ while (string[0]) { string++; if ((*secsize)-- <= 1) return NULL; } /* Skip any zero padding. */ while (!string[0]) { string++; if ((*secsize)-- <= 1) return NULL; } return string; } |
49668688d module: pass load... |
2087 |
static char *get_modinfo(struct load_info *info, const char *tag) |
1da177e4c Linux-2.6.12-rc2 |
2088 2089 2090 |
{ char *p; unsigned int taglen = strlen(tag); |
49668688d module: pass load... |
2091 2092 |
Elf_Shdr *infosec = &info->sechdrs[info->index.info]; unsigned long size = infosec->sh_size; |
1da177e4c Linux-2.6.12-rc2 |
2093 |
|
49668688d module: pass load... |
2094 |
for (p = (char *)infosec->sh_addr; p; p = next_string(p, &size)) { |
1da177e4c Linux-2.6.12-rc2 |
2095 2096 2097 2098 2099 |
if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=') return p + taglen + 1; } return NULL; } |
49668688d module: pass load... |
2100 |
static void setup_modinfo(struct module *mod, struct load_info *info) |
c988d2b28 [PATCH] modules: ... |
2101 2102 2103 2104 2105 2106 |
{ struct module_attribute *attr; int i; for (i = 0; (attr = modinfo_attrs[i]); i++) { if (attr->setup) |
49668688d module: pass load... |
2107 |
attr->setup(mod, get_modinfo(info, attr->attr.name)); |
c988d2b28 [PATCH] modules: ... |
2108 2109 |
} } |
c988d2b28 [PATCH] modules: ... |
2110 |
|
a263f7763 module: fix memor... |
2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 |
static void free_modinfo(struct module *mod) { struct module_attribute *attr; int i; for (i = 0; (attr = modinfo_attrs[i]); i++) { if (attr->free) attr->free(mod); } } |
1da177e4c Linux-2.6.12-rc2 |
2121 |
#ifdef CONFIG_KALLSYMS |
15bba37d6 module: fix build... |
2122 2123 2124 2125 2126 2127 |
/* lookup symbol in given range of kernel_symbols */ static const struct kernel_symbol *lookup_symbol(const char *name, const struct kernel_symbol *start, const struct kernel_symbol *stop) { |
9d63487f8 module: Use binar... |
2128 2129 |
return bsearch(name, start, stop - start, sizeof(struct kernel_symbol), cmp_name); |
15bba37d6 module: fix build... |
2130 |
} |
ca4787b77 kernel/module.c: ... |
2131 2132 |
static int is_exported(const char *name, unsigned long value, const struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
2133 |
{ |
ca4787b77 kernel/module.c: ... |
2134 2135 2136 |
const struct kernel_symbol *ks; if (!mod) ks = lookup_symbol(name, __start___ksymtab, __stop___ksymtab); |
3fd6805f4 [PATCH] Clean up ... |
2137 |
else |
ca4787b77 kernel/module.c: ... |
2138 2139 |
ks = lookup_symbol(name, mod->syms, mod->syms + mod->num_syms); return ks != NULL && ks->value == value; |
1da177e4c Linux-2.6.12-rc2 |
2140 2141 2142 |
} /* As per nm */ |
eded41c1c module: kallsyms ... |
2143 |
static char elf_type(const Elf_Sym *sym, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2144 |
{ |
eded41c1c module: kallsyms ... |
2145 |
const Elf_Shdr *sechdrs = info->sechdrs; |
1da177e4c Linux-2.6.12-rc2 |
2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 |
if (ELF_ST_BIND(sym->st_info) == STB_WEAK) { if (ELF_ST_TYPE(sym->st_info) == STT_OBJECT) return 'v'; else return 'w'; } if (sym->st_shndx == SHN_UNDEF) return 'U'; if (sym->st_shndx == SHN_ABS) return 'a'; if (sym->st_shndx >= SHN_LORESERVE) return '?'; if (sechdrs[sym->st_shndx].sh_flags & SHF_EXECINSTR) return 't'; if (sechdrs[sym->st_shndx].sh_flags & SHF_ALLOC && sechdrs[sym->st_shndx].sh_type != SHT_NOBITS) { if (!(sechdrs[sym->st_shndx].sh_flags & SHF_WRITE)) return 'r'; else if (sechdrs[sym->st_shndx].sh_flags & ARCH_SHF_SMALL) return 'g'; else return 'd'; } if (sechdrs[sym->st_shndx].sh_type == SHT_NOBITS) { if (sechdrs[sym->st_shndx].sh_flags & ARCH_SHF_SMALL) return 's'; else return 'b'; } |
eded41c1c module: kallsyms ... |
2175 2176 |
if (strstarts(info->secstrings + sechdrs[sym->st_shndx].sh_name, ".debug")) { |
1da177e4c Linux-2.6.12-rc2 |
2177 |
return 'n'; |
eded41c1c module: kallsyms ... |
2178 |
} |
1da177e4c Linux-2.6.12-rc2 |
2179 2180 |
return '?'; } |
4a4962263 module: reduce sy... |
2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 |
static bool is_core_symbol(const Elf_Sym *src, const Elf_Shdr *sechdrs, unsigned int shnum) { const Elf_Shdr *sec; if (src->st_shndx == SHN_UNDEF || src->st_shndx >= shnum || !src->st_name) return false; sec = sechdrs + src->st_shndx; if (!(sec->sh_flags & SHF_ALLOC) #ifndef CONFIG_KALLSYMS_ALL || !(sec->sh_flags & SHF_EXECINSTR) #endif || (sec->sh_entsize & INIT_OFFSET_MASK)) return false; return true; } |
48fd11880 module: Fix perfo... |
2201 2202 2203 2204 2205 2206 2207 |
/* * We only allocate and copy the strings needed by the parts of symtab * we keep. This is simple, but has the effect of making multiple * copies of duplicates. We could be more sophisticated, see * linux-kernel thread starting with * <73defb5e4bca04a6431392cc341112b1@localhost>. */ |
49668688d module: pass load... |
2208 |
static void layout_symtab(struct module *mod, struct load_info *info) |
4a4962263 module: reduce sy... |
2209 |
{ |
49668688d module: pass load... |
2210 2211 |
Elf_Shdr *symsect = info->sechdrs + info->index.sym; Elf_Shdr *strsect = info->sechdrs + info->index.str; |
4a4962263 module: reduce sy... |
2212 |
const Elf_Sym *src; |
54523ec71 module: Remove a ... |
2213 |
unsigned int i, nsrc, ndst, strtab_size = 0; |
4a4962263 module: reduce sy... |
2214 2215 2216 2217 |
/* Put symbol section at end of init part of module. */ symsect->sh_flags |= SHF_ALLOC; symsect->sh_entsize = get_offset(mod, &mod->init_size, symsect, |
49668688d module: pass load... |
2218 |
info->index.sym) | INIT_OFFSET_MASK; |
5e1241692 module: replace D... |
2219 2220 |
pr_debug("\t%s ", info->secstrings + symsect->sh_name); |
4a4962263 module: reduce sy... |
2221 |
|
49668688d module: pass load... |
2222 |
src = (void *)info->hdr + symsect->sh_offset; |
4a4962263 module: reduce sy... |
2223 |
nsrc = symsect->sh_size / sizeof(*src); |
70b1e9161 module: Add comme... |
2224 |
|
48fd11880 module: Fix perfo... |
2225 |
/* Compute total space required for the core symbols' strtab. */ |
59ef28b1f module: fix out-b... |
2226 2227 2228 2229 |
for (ndst = i = 0; i < nsrc; i++) { if (i == 0 || is_core_symbol(src+i, info->sechdrs, info->hdr->e_shnum)) { strtab_size += strlen(&info->strtab[src[i].st_name])+1; |
48fd11880 module: Fix perfo... |
2230 |
ndst++; |
554bdfe5a module: reduce st... |
2231 |
} |
59ef28b1f module: fix out-b... |
2232 |
} |
4a4962263 module: reduce sy... |
2233 2234 |
/* Append room for core symbols at end of core part. */ |
49668688d module: pass load... |
2235 |
info->symoffs = ALIGN(mod->core_size, symsect->sh_addralign ?: 1); |
48fd11880 module: Fix perfo... |
2236 2237 |
info->stroffs = mod->core_size = info->symoffs + ndst * sizeof(Elf_Sym); mod->core_size += strtab_size; |
4a4962263 module: reduce sy... |
2238 |
|
554bdfe5a module: reduce st... |
2239 2240 2241 |
/* Put string table section at end of init part of module. */ strsect->sh_flags |= SHF_ALLOC; strsect->sh_entsize = get_offset(mod, &mod->init_size, strsect, |
49668688d module: pass load... |
2242 |
info->index.str) | INIT_OFFSET_MASK; |
5e1241692 module: replace D... |
2243 2244 |
pr_debug("\t%s ", info->secstrings + strsect->sh_name); |
4a4962263 module: reduce sy... |
2245 |
} |
811d66a0e module: group pos... |
2246 |
static void add_kallsyms(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2247 |
{ |
4a4962263 module: reduce sy... |
2248 2249 2250 |
unsigned int i, ndst; const Elf_Sym *src; Elf_Sym *dst; |
554bdfe5a module: reduce st... |
2251 |
char *s; |
eded41c1c module: kallsyms ... |
2252 |
Elf_Shdr *symsec = &info->sechdrs[info->index.sym]; |
1da177e4c Linux-2.6.12-rc2 |
2253 |
|
eded41c1c module: kallsyms ... |
2254 2255 |
mod->symtab = (void *)symsec->sh_addr; mod->num_symtab = symsec->sh_size / sizeof(Elf_Sym); |
511ca6ae4 module: fix crash... |
2256 2257 |
/* Make sure we get permanent strtab: don't use info->strtab. */ mod->strtab = (void *)info->sechdrs[info->index.str].sh_addr; |
1da177e4c Linux-2.6.12-rc2 |
2258 2259 2260 |
/* Set types up while we still have access to sections. */ for (i = 0; i < mod->num_symtab; i++) |
eded41c1c module: kallsyms ... |
2261 |
mod->symtab[i].st_info = elf_type(&mod->symtab[i], info); |
4a4962263 module: reduce sy... |
2262 |
|
d913188c7 module: layout_an... |
2263 |
mod->core_symtab = dst = mod->module_core + info->symoffs; |
48fd11880 module: Fix perfo... |
2264 |
mod->core_strtab = s = mod->module_core + info->stroffs; |
4a4962263 module: reduce sy... |
2265 |
src = mod->symtab; |
59ef28b1f module: fix out-b... |
2266 2267 2268 2269 2270 2271 2272 2273 |
for (ndst = i = 0; i < mod->num_symtab; i++) { if (i == 0 || is_core_symbol(src+i, info->sechdrs, info->hdr->e_shnum)) { dst[ndst] = src[i]; dst[ndst++].st_name = s - mod->core_strtab; s += strlcpy(s, &mod->strtab[src[i].st_name], KSYM_NAME_LEN) + 1; } |
4a4962263 module: reduce sy... |
2274 2275 |
} mod->core_num_syms = ndst; |
1da177e4c Linux-2.6.12-rc2 |
2276 2277 |
} #else |
49668688d module: pass load... |
2278 |
static inline void layout_symtab(struct module *mod, struct load_info *info) |
4a4962263 module: reduce sy... |
2279 2280 |
{ } |
3ae91c21d module: fix up CO... |
2281 |
|
abbce906d (trivial) Fix com... |
2282 |
static void add_kallsyms(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2283 2284 2285 |
{ } #endif /* CONFIG_KALLSYMS */ |
e9d376f0f dynamic debug: co... |
2286 |
static void dynamic_debug_setup(struct _ddebug *debug, unsigned int num) |
346e15beb driver core: basi... |
2287 |
{ |
811d66a0e module: group pos... |
2288 2289 |
if (!debug) return; |
e9d376f0f dynamic debug: co... |
2290 2291 2292 2293 2294 2295 |
#ifdef CONFIG_DYNAMIC_DEBUG if (ddebug_add_module(debug, num, debug->modname)) printk(KERN_ERR "dynamic debug error adding module: %s ", debug->modname); #endif |
5e458cc0f module: simplify ... |
2296 |
} |
346e15beb driver core: basi... |
2297 |
|
ff49d74ad module: initializ... |
2298 2299 2300 2301 2302 |
static void dynamic_debug_remove(struct _ddebug *debug) { if (debug) ddebug_remove_module(debug->modname); } |
74e08fcf7 modules: add defa... |
2303 2304 |
void * __weak module_alloc(unsigned long size) { |
82fab442f modules: don't ha... |
2305 |
return vmalloc_exec(size); |
74e08fcf7 modules: add defa... |
2306 |
} |
3a642e99b modules: Take a s... |
2307 2308 2309 2310 2311 |
static void *module_alloc_update_bounds(unsigned long size) { void *ret = module_alloc(size); if (ret) { |
75676500f module: make lock... |
2312 |
mutex_lock(&module_mutex); |
3a642e99b modules: Take a s... |
2313 2314 2315 2316 2317 |
/* Update module bounds. */ if ((unsigned long)ret < module_addr_min) module_addr_min = (unsigned long)ret; if ((unsigned long)ret + size > module_addr_max) module_addr_max = (unsigned long)ret + size; |
75676500f module: make lock... |
2318 |
mutex_unlock(&module_mutex); |
3a642e99b modules: Take a s... |
2319 2320 2321 |
} return ret; } |
4f2294b6d kmemleak: Add mod... |
2322 |
#ifdef CONFIG_DEBUG_KMEMLEAK |
49668688d module: pass load... |
2323 2324 |
static void kmemleak_load_module(const struct module *mod, const struct load_info *info) |
4f2294b6d kmemleak: Add mod... |
2325 2326 2327 2328 |
{ unsigned int i; /* only scan the sections containing data */ |
c017b4be3 kmemleak: Simplif... |
2329 |
kmemleak_scan_area(mod, sizeof(struct module), GFP_KERNEL); |
4f2294b6d kmemleak: Add mod... |
2330 |
|
49668688d module: pass load... |
2331 2332 2333 |
for (i = 1; i < info->hdr->e_shnum; i++) { const char *name = info->secstrings + info->sechdrs[i].sh_name; if (!(info->sechdrs[i].sh_flags & SHF_ALLOC)) |
4f2294b6d kmemleak: Add mod... |
2334 |
continue; |
49668688d module: pass load... |
2335 |
if (!strstarts(name, ".data") && !strstarts(name, ".bss")) |
4f2294b6d kmemleak: Add mod... |
2336 |
continue; |
49668688d module: pass load... |
2337 2338 |
kmemleak_scan_area((void *)info->sechdrs[i].sh_addr, info->sechdrs[i].sh_size, GFP_KERNEL); |
4f2294b6d kmemleak: Add mod... |
2339 2340 2341 |
} } #else |
49668688d module: pass load... |
2342 2343 |
static inline void kmemleak_load_module(const struct module *mod, const struct load_info *info) |
4f2294b6d kmemleak: Add mod... |
2344 2345 2346 |
{ } #endif |
106a4ee25 module: signature... |
2347 |
#ifdef CONFIG_MODULE_SIG |
34e1169d9 module: add sysca... |
2348 |
static int module_sig_check(struct load_info *info) |
106a4ee25 module: signature... |
2349 2350 |
{ int err = -ENOKEY; |
34e1169d9 module: add sysca... |
2351 2352 |
const unsigned long markerlen = sizeof(MODULE_SIG_STRING) - 1; const void *mod = info->hdr; |
caabe2405 MODSIGN: Move the... |
2353 |
|
34e1169d9 module: add sysca... |
2354 2355 |
if (info->len > markerlen && memcmp(mod + info->len - markerlen, MODULE_SIG_STRING, markerlen) == 0) { |
caabe2405 MODSIGN: Move the... |
2356 |
/* We truncate the module to discard the signature */ |
34e1169d9 module: add sysca... |
2357 2358 |
info->len -= markerlen; err = mod_verify_sig(mod, &info->len); |
106a4ee25 module: signature... |
2359 2360 2361 2362 2363 2364 2365 2366 |
} if (!err) { info->sig_ok = true; return 0; } /* Not having a signature is only an error if we're strict. */ |
1d0059f3a MODSIGN: Add FIPS... |
2367 2368 2369 2370 |
if (err < 0 && fips_enabled) panic("Module verification failed with error %d in FIPS mode ", err); |
106a4ee25 module: signature... |
2371 2372 2373 2374 2375 2376 |
if (err == -ENOKEY && !sig_enforce) err = 0; return err; } #else /* !CONFIG_MODULE_SIG */ |
34e1169d9 module: add sysca... |
2377 |
static int module_sig_check(struct load_info *info) |
106a4ee25 module: signature... |
2378 2379 2380 2381 |
{ return 0; } #endif /* !CONFIG_MODULE_SIG */ |
34e1169d9 module: add sysca... |
2382 2383 |
/* Sanity checks against invalid binaries, wrong arch, weird elf version. */ static int elf_header_check(struct load_info *info) |
40dd2560e module: refactor ... |
2384 |
{ |
34e1169d9 module: add sysca... |
2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 |
if (info->len < sizeof(*(info->hdr))) return -ENOEXEC; if (memcmp(info->hdr->e_ident, ELFMAG, SELFMAG) != 0 || info->hdr->e_type != ET_REL || !elf_check_arch(info->hdr) || info->hdr->e_shentsize != sizeof(Elf_Shdr)) return -ENOEXEC; if (info->hdr->e_shoff >= info->len || (info->hdr->e_shnum * sizeof(Elf_Shdr) > info->len - info->hdr->e_shoff)) return -ENOEXEC; |
40dd2560e module: refactor ... |
2398 |
|
34e1169d9 module: add sysca... |
2399 2400 2401 2402 2403 2404 |
return 0; } /* Sets info->hdr and info->len. */ static int copy_module_from_user(const void __user *umod, unsigned long len, struct load_info *info) |
40dd2560e module: refactor ... |
2405 2406 |
{ int err; |
40dd2560e module: refactor ... |
2407 |
|
34e1169d9 module: add sysca... |
2408 2409 |
info->len = len; if (info->len < sizeof(*(info->hdr))) |
40dd2560e module: refactor ... |
2410 |
return -ENOEXEC; |
2e72d51b4 security: introdu... |
2411 2412 2413 |
err = security_kernel_module_from_file(NULL); if (err) return err; |
40dd2560e module: refactor ... |
2414 |
/* Suck in entire file: we'll want most of it. */ |
34e1169d9 module: add sysca... |
2415 2416 |
info->hdr = vmalloc(info->len); if (!info->hdr) |
40dd2560e module: refactor ... |
2417 |
return -ENOMEM; |
34e1169d9 module: add sysca... |
2418 2419 2420 |
if (copy_from_user(info->hdr, umod, info->len) != 0) { vfree(info->hdr); return -EFAULT; |
40dd2560e module: refactor ... |
2421 |
} |
34e1169d9 module: add sysca... |
2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 |
return 0; } /* Sets info->hdr and info->len. */ static int copy_module_from_fd(int fd, struct load_info *info) { struct file *file; int err; struct kstat stat; loff_t pos; ssize_t bytes = 0; file = fget(fd); if (!file) return -ENOEXEC; |
2e72d51b4 security: introdu... |
2437 |
err = security_kernel_module_from_file(file); |
106a4ee25 module: signature... |
2438 |
if (err) |
2e72d51b4 security: introdu... |
2439 |
goto out; |
106a4ee25 module: signature... |
2440 |
|
3dadecce2 switch vfs_getatt... |
2441 |
err = vfs_getattr(&file->f_path, &stat); |
106a4ee25 module: signature... |
2442 |
if (err) |
34e1169d9 module: add sysca... |
2443 |
goto out; |
40dd2560e module: refactor ... |
2444 |
|
34e1169d9 module: add sysca... |
2445 2446 2447 |
if (stat.size > INT_MAX) { err = -EFBIG; goto out; |
40dd2560e module: refactor ... |
2448 |
} |
52441fa8f module: prevent w... |
2449 2450 2451 2452 2453 2454 |
/* Don't hand 0 to vmalloc, it whines. */ if (stat.size == 0) { err = -EINVAL; goto out; } |
34e1169d9 module: add sysca... |
2455 2456 2457 2458 |
info->hdr = vmalloc(stat.size); if (!info->hdr) { err = -ENOMEM; goto out; |
40dd2560e module: refactor ... |
2459 |
} |
d913188c7 module: layout_an... |
2460 |
|
34e1169d9 module: add sysca... |
2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 |
pos = 0; while (pos < stat.size) { bytes = kernel_read(file, pos, (char *)(info->hdr) + pos, stat.size - pos); if (bytes < 0) { vfree(info->hdr); err = bytes; goto out; } if (bytes == 0) break; pos += bytes; } info->len = pos; |
40dd2560e module: refactor ... |
2475 |
|
34e1169d9 module: add sysca... |
2476 2477 |
out: fput(file); |
40dd2560e module: refactor ... |
2478 2479 |
return err; } |
d913188c7 module: layout_an... |
2480 2481 |
static void free_copy(struct load_info *info) { |
d913188c7 module: layout_an... |
2482 2483 |
vfree(info->hdr); } |
2f3238aeb module: add flags... |
2484 |
static int rewrite_section_headers(struct load_info *info, int flags) |
8b5f61a79 module: refactor ... |
2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 |
{ unsigned int i; /* This should always be true, but let's be sure. */ info->sechdrs[0].sh_addr = 0; for (i = 1; i < info->hdr->e_shnum; i++) { Elf_Shdr *shdr = &info->sechdrs[i]; if (shdr->sh_type != SHT_NOBITS && info->len < shdr->sh_offset + shdr->sh_size) { printk(KERN_ERR "Module len %lu truncated ", info->len); return -ENOEXEC; } /* Mark all sections sh_addr with their address in the temporary image. */ shdr->sh_addr = (size_t)info->hdr + shdr->sh_offset; #ifndef CONFIG_MODULE_UNLOAD /* Don't load .exit sections */ if (strstarts(info->secstrings+shdr->sh_name, ".exit")) shdr->sh_flags &= ~(unsigned long)SHF_ALLOC; #endif |
8b5f61a79 module: refactor ... |
2510 |
} |
d6df72a06 module: refactor ... |
2511 2512 |
/* Track but don't keep modinfo and version sections. */ |
2f3238aeb module: add flags... |
2513 2514 2515 2516 |
if (flags & MODULE_INIT_IGNORE_MODVERSIONS) info->index.vers = 0; /* Pretend no __versions section! */ else info->index.vers = find_sec(info, "__versions"); |
49668688d module: pass load... |
2517 |
info->index.info = find_sec(info, ".modinfo"); |
d6df72a06 module: refactor ... |
2518 2519 |
info->sechdrs[info->index.info].sh_flags &= ~(unsigned long)SHF_ALLOC; info->sechdrs[info->index.vers].sh_flags &= ~(unsigned long)SHF_ALLOC; |
8b5f61a79 module: refactor ... |
2520 2521 |
return 0; } |
3264d3f9d module: add load_... |
2522 2523 2524 2525 2526 2527 2528 2529 |
/* * Set up our basic convenience variables (pointers to section headers, * search for module section index etc), and do some basic section * verification. * * Return the temporary module pointer (we'll replace it with the final * one when we move the module sections around). */ |
2f3238aeb module: add flags... |
2530 |
static struct module *setup_load_info(struct load_info *info, int flags) |
3264d3f9d module: add load_... |
2531 2532 |
{ unsigned int i; |
8b5f61a79 module: refactor ... |
2533 |
int err; |
3264d3f9d module: add load_... |
2534 2535 2536 2537 |
struct module *mod; /* Set up the convenience variables */ info->sechdrs = (void *)info->hdr + info->hdr->e_shoff; |
8b5f61a79 module: refactor ... |
2538 2539 |
info->secstrings = (void *)info->hdr + info->sechdrs[info->hdr->e_shstrndx].sh_offset; |
3264d3f9d module: add load_... |
2540 |
|
2f3238aeb module: add flags... |
2541 |
err = rewrite_section_headers(info, flags); |
8b5f61a79 module: refactor ... |
2542 2543 |
if (err) return ERR_PTR(err); |
3264d3f9d module: add load_... |
2544 |
|
8b5f61a79 module: refactor ... |
2545 2546 |
/* Find internal symbols and strings. */ for (i = 1; i < info->hdr->e_shnum; i++) { |
3264d3f9d module: add load_... |
2547 2548 2549 |
if (info->sechdrs[i].sh_type == SHT_SYMTAB) { info->index.sym = i; info->index.str = info->sechdrs[i].sh_link; |
8b5f61a79 module: refactor ... |
2550 2551 2552 |
info->strtab = (char *)info->hdr + info->sechdrs[info->index.str].sh_offset; break; |
3264d3f9d module: add load_... |
2553 |
} |
3264d3f9d module: add load_... |
2554 |
} |
49668688d module: pass load... |
2555 |
info->index.mod = find_sec(info, ".gnu.linkonce.this_module"); |
3264d3f9d module: add load_... |
2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 |
if (!info->index.mod) { printk(KERN_WARNING "No module found in object "); return ERR_PTR(-ENOEXEC); } /* This is temporary: point mod into copy of data. */ mod = (void *)info->sechdrs[info->index.mod].sh_addr; if (info->index.sym == 0) { printk(KERN_WARNING "%s: module has no symbols (stripped?) ", mod->name); return ERR_PTR(-ENOEXEC); } |
49668688d module: pass load... |
2570 |
info->index.pcpu = find_pcpusec(info); |
3264d3f9d module: add load_... |
2571 |
|
3264d3f9d module: add load_... |
2572 2573 2574 2575 2576 |
/* Check module struct version now, before we try to use module. */ if (!check_modstruct_version(info->sechdrs, info->index.vers, mod)) return ERR_PTR(-ENOEXEC); return mod; |
3264d3f9d module: add load_... |
2577 |
} |
2f3238aeb module: add flags... |
2578 |
static int check_modinfo(struct module *mod, struct load_info *info, int flags) |
40dd2560e module: refactor ... |
2579 |
{ |
49668688d module: pass load... |
2580 |
const char *modmagic = get_modinfo(info, "vermagic"); |
40dd2560e module: refactor ... |
2581 |
int err; |
2f3238aeb module: add flags... |
2582 2583 |
if (flags & MODULE_INIT_IGNORE_VERMAGIC) modmagic = NULL; |
40dd2560e module: refactor ... |
2584 2585 2586 2587 2588 |
/* This is allowed: modprobe --force will invalidate it. */ if (!modmagic) { err = try_to_force_load(mod, "bad vermagic"); if (err) return err; |
49668688d module: pass load... |
2589 |
} else if (!same_magic(modmagic, vermagic, info->index.vers)) { |
40dd2560e module: refactor ... |
2590 2591 2592 2593 2594 |
printk(KERN_ERR "%s: version magic '%s' should be '%s' ", mod->name, modmagic, vermagic); return -ENOEXEC; } |
2449b8ba0 module,bug: Add T... |
2595 |
if (!get_modinfo(info, "intree")) |
373d4d099 taint: add explic... |
2596 |
add_taint_module(mod, TAINT_OOT_MODULE, LOCKDEP_STILL_OK); |
2449b8ba0 module,bug: Add T... |
2597 |
|
49668688d module: pass load... |
2598 |
if (get_modinfo(info, "staging")) { |
373d4d099 taint: add explic... |
2599 |
add_taint_module(mod, TAINT_CRAP, LOCKDEP_STILL_OK); |
40dd2560e module: refactor ... |
2600 2601 2602 2603 2604 |
printk(KERN_WARNING "%s: module is from the staging directory," " the quality is unknown, you have been warned. ", mod->name); } |
22e268ebe module: refactor ... |
2605 2606 |
/* Set up license info based on the info section */ |
49668688d module: pass load... |
2607 |
set_license(mod, get_modinfo(info, "license")); |
22e268ebe module: refactor ... |
2608 |
|
40dd2560e module: refactor ... |
2609 2610 |
return 0; } |
811d66a0e module: group pos... |
2611 |
static void find_module_sections(struct module *mod, struct load_info *info) |
f91a13bb9 module: refactor ... |
2612 |
{ |
49668688d module: pass load... |
2613 |
mod->kp = section_objs(info, "__param", |
f91a13bb9 module: refactor ... |
2614 |
sizeof(*mod->kp), &mod->num_kp); |
49668688d module: pass load... |
2615 |
mod->syms = section_objs(info, "__ksymtab", |
f91a13bb9 module: refactor ... |
2616 |
sizeof(*mod->syms), &mod->num_syms); |
49668688d module: pass load... |
2617 2618 |
mod->crcs = section_addr(info, "__kcrctab"); mod->gpl_syms = section_objs(info, "__ksymtab_gpl", |
f91a13bb9 module: refactor ... |
2619 2620 |
sizeof(*mod->gpl_syms), &mod->num_gpl_syms); |
49668688d module: pass load... |
2621 2622 |
mod->gpl_crcs = section_addr(info, "__kcrctab_gpl"); mod->gpl_future_syms = section_objs(info, |
f91a13bb9 module: refactor ... |
2623 2624 2625 |
"__ksymtab_gpl_future", sizeof(*mod->gpl_future_syms), &mod->num_gpl_future_syms); |
49668688d module: pass load... |
2626 |
mod->gpl_future_crcs = section_addr(info, "__kcrctab_gpl_future"); |
f91a13bb9 module: refactor ... |
2627 2628 |
#ifdef CONFIG_UNUSED_SYMBOLS |
49668688d module: pass load... |
2629 |
mod->unused_syms = section_objs(info, "__ksymtab_unused", |
f91a13bb9 module: refactor ... |
2630 2631 |
sizeof(*mod->unused_syms), &mod->num_unused_syms); |
49668688d module: pass load... |
2632 2633 |
mod->unused_crcs = section_addr(info, "__kcrctab_unused"); mod->unused_gpl_syms = section_objs(info, "__ksymtab_unused_gpl", |
f91a13bb9 module: refactor ... |
2634 2635 |
sizeof(*mod->unused_gpl_syms), &mod->num_unused_gpl_syms); |
49668688d module: pass load... |
2636 |
mod->unused_gpl_crcs = section_addr(info, "__kcrctab_unused_gpl"); |
f91a13bb9 module: refactor ... |
2637 2638 |
#endif #ifdef CONFIG_CONSTRUCTORS |
49668688d module: pass load... |
2639 |
mod->ctors = section_objs(info, ".ctors", |
f91a13bb9 module: refactor ... |
2640 2641 2642 2643 |
sizeof(*mod->ctors), &mod->num_ctors); #endif #ifdef CONFIG_TRACEPOINTS |
654986462 tracepoints: Fix ... |
2644 2645 2646 |
mod->tracepoints_ptrs = section_objs(info, "__tracepoints_ptrs", sizeof(*mod->tracepoints_ptrs), &mod->num_tracepoints); |
f91a13bb9 module: refactor ... |
2647 |
#endif |
bf5438fca jump label: Base ... |
2648 2649 2650 2651 2652 |
#ifdef HAVE_JUMP_LABEL mod->jump_entries = section_objs(info, "__jump_table", sizeof(*mod->jump_entries), &mod->num_jump_entries); #endif |
f91a13bb9 module: refactor ... |
2653 |
#ifdef CONFIG_EVENT_TRACING |
49668688d module: pass load... |
2654 |
mod->trace_events = section_objs(info, "_ftrace_events", |
f91a13bb9 module: refactor ... |
2655 2656 2657 2658 2659 2660 2661 2662 2663 |
sizeof(*mod->trace_events), &mod->num_trace_events); /* * This section contains pointers to allocated objects in the trace * code and not scanning it leads to false positives. */ kmemleak_scan_area(mod->trace_events, sizeof(*mod->trace_events) * mod->num_trace_events, GFP_KERNEL); #endif |
13b9b6e74 tracing: Fix modu... |
2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 |
#ifdef CONFIG_TRACING mod->trace_bprintk_fmt_start = section_objs(info, "__trace_printk_fmt", sizeof(*mod->trace_bprintk_fmt_start), &mod->num_trace_bprintk_fmt); /* * This section contains pointers to allocated objects in the trace * code and not scanning it leads to false positives. */ kmemleak_scan_area(mod->trace_bprintk_fmt_start, sizeof(*mod->trace_bprintk_fmt_start) * mod->num_trace_bprintk_fmt, GFP_KERNEL); #endif |
f91a13bb9 module: refactor ... |
2676 2677 |
#ifdef CONFIG_FTRACE_MCOUNT_RECORD /* sechdrs[0].sh_size is always zero */ |
49668688d module: pass load... |
2678 |
mod->ftrace_callsites = section_objs(info, "__mcount_loc", |
f91a13bb9 module: refactor ... |
2679 2680 2681 |
sizeof(*mod->ftrace_callsites), &mod->num_ftrace_callsites); #endif |
22e268ebe module: refactor ... |
2682 |
|
811d66a0e module: group pos... |
2683 2684 |
mod->extable = section_objs(info, "__ex_table", sizeof(*mod->extable), &mod->num_exentries); |
49668688d module: pass load... |
2685 |
if (section_addr(info, "__obsparm")) |
22e268ebe module: refactor ... |
2686 2687 2688 |
printk(KERN_WARNING "%s: Ignoring obsolete parameters ", mod->name); |
811d66a0e module: group pos... |
2689 2690 2691 |
info->debug = section_objs(info, "__verbose", sizeof(*info->debug), &info->num_debug); |
f91a13bb9 module: refactor ... |
2692 |
} |
49668688d module: pass load... |
2693 |
static int move_module(struct module *mod, struct load_info *info) |
65b8a9b4d module: refactor ... |
2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 |
{ int i; void *ptr; /* Do the allocs. */ ptr = module_alloc_update_bounds(mod->core_size); /* * The pointer to this block is stored in the module structure * which is inside the block. Just mark it as not being a * leak. */ kmemleak_not_leak(ptr); if (!ptr) |
d913188c7 module: layout_an... |
2707 |
return -ENOMEM; |
65b8a9b4d module: refactor ... |
2708 2709 2710 |
memset(ptr, 0, mod->core_size); mod->module_core = ptr; |
82fab442f modules: don't ha... |
2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 |
if (mod->init_size) { ptr = module_alloc_update_bounds(mod->init_size); /* * The pointer to this block is stored in the module structure * which is inside the block. This block doesn't need to be * scanned as it contains data and code that will be freed * after the module is initialized. */ kmemleak_ignore(ptr); if (!ptr) { module_free(mod, mod->module_core); return -ENOMEM; } memset(ptr, 0, mod->init_size); mod->module_init = ptr; } else mod->module_init = NULL; |
65b8a9b4d module: refactor ... |
2728 2729 |
/* Transfer each section which specifies SHF_ALLOC */ |
5e1241692 module: replace D... |
2730 2731 |
pr_debug("final section addresses: "); |
49668688d module: pass load... |
2732 |
for (i = 0; i < info->hdr->e_shnum; i++) { |
65b8a9b4d module: refactor ... |
2733 |
void *dest; |
49668688d module: pass load... |
2734 |
Elf_Shdr *shdr = &info->sechdrs[i]; |
65b8a9b4d module: refactor ... |
2735 |
|
49668688d module: pass load... |
2736 |
if (!(shdr->sh_flags & SHF_ALLOC)) |
65b8a9b4d module: refactor ... |
2737 |
continue; |
49668688d module: pass load... |
2738 |
if (shdr->sh_entsize & INIT_OFFSET_MASK) |
65b8a9b4d module: refactor ... |
2739 |
dest = mod->module_init |
49668688d module: pass load... |
2740 |
+ (shdr->sh_entsize & ~INIT_OFFSET_MASK); |
65b8a9b4d module: refactor ... |
2741 |
else |
49668688d module: pass load... |
2742 |
dest = mod->module_core + shdr->sh_entsize; |
65b8a9b4d module: refactor ... |
2743 |
|
49668688d module: pass load... |
2744 2745 |
if (shdr->sh_type != SHT_NOBITS) memcpy(dest, (void *)shdr->sh_addr, shdr->sh_size); |
65b8a9b4d module: refactor ... |
2746 |
/* Update sh_addr to point to copy in image. */ |
49668688d module: pass load... |
2747 |
shdr->sh_addr = (unsigned long)dest; |
5e1241692 module: replace D... |
2748 2749 2750 |
pr_debug("\t0x%lx %s ", (long)shdr->sh_addr, info->secstrings + shdr->sh_name); |
65b8a9b4d module: refactor ... |
2751 |
} |
d913188c7 module: layout_an... |
2752 2753 |
return 0; |
65b8a9b4d module: refactor ... |
2754 |
} |
49668688d module: pass load... |
2755 |
static int check_module_license_and_versions(struct module *mod) |
22e268ebe module: refactor ... |
2756 2757 2758 2759 2760 2761 2762 |
{ /* * ndiswrapper is under GPL by itself, but loads proprietary modules. * Don't use add_taint_module(), as it would prevent ndiswrapper from * using GPL-only symbols it needs. */ if (strcmp(mod->name, "ndiswrapper") == 0) |
373d4d099 taint: add explic... |
2763 |
add_taint(TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
22e268ebe module: refactor ... |
2764 2765 2766 |
/* driverloader was caught wrongly pretending to be under GPL */ if (strcmp(mod->name, "driverloader") == 0) |
373d4d099 taint: add explic... |
2767 2768 |
add_taint_module(mod, TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
22e268ebe module: refactor ... |
2769 |
|
c99af3752 module: taint ker... |
2770 2771 |
/* lve claims to be GPL but upstream won't provide source */ if (strcmp(mod->name, "lve") == 0) |
373d4d099 taint: add explic... |
2772 2773 |
add_taint_module(mod, TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
c99af3752 module: taint ker... |
2774 |
|
22e268ebe module: refactor ... |
2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 |
#ifdef CONFIG_MODVERSIONS if ((mod->num_syms && !mod->crcs) || (mod->num_gpl_syms && !mod->gpl_crcs) || (mod->num_gpl_future_syms && !mod->gpl_future_crcs) #ifdef CONFIG_UNUSED_SYMBOLS || (mod->num_unused_syms && !mod->unused_crcs) || (mod->num_unused_gpl_syms && !mod->unused_gpl_crcs) #endif ) { return try_to_force_load(mod, "no versions for exported symbols"); } #endif return 0; } static void flush_module_icache(const struct module *mod) { mm_segment_t old_fs; /* flush the icache in correct context */ old_fs = get_fs(); set_fs(KERNEL_DS); /* * Flush the instruction cache, since we've played with text. * Do it before processing of module parameters, so the module * can provide parameter accessor functions of its own. */ if (mod->module_init) flush_icache_range((unsigned long)mod->module_init, (unsigned long)mod->module_init + mod->init_size); flush_icache_range((unsigned long)mod->module_core, (unsigned long)mod->module_core + mod->core_size); set_fs(old_fs); } |
74e08fcf7 modules: add defa... |
2813 2814 2815 2816 2817 2818 2819 |
int __weak module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, char *secstrings, struct module *mod) { return 0; } |
2f3238aeb module: add flags... |
2820 |
static struct module *layout_and_allocate(struct load_info *info, int flags) |
1da177e4c Linux-2.6.12-rc2 |
2821 |
{ |
d913188c7 module: layout_an... |
2822 |
/* Module within temporary copy. */ |
1da177e4c Linux-2.6.12-rc2 |
2823 |
struct module *mod; |
49668688d module: pass load... |
2824 |
Elf_Shdr *pcpusec; |
d913188c7 module: layout_an... |
2825 |
int err; |
3ae91c21d module: fix up CO... |
2826 |
|
2f3238aeb module: add flags... |
2827 |
mod = setup_load_info(info, flags); |
d913188c7 module: layout_an... |
2828 2829 |
if (IS_ERR(mod)) return mod; |
1da177e4c Linux-2.6.12-rc2 |
2830 |
|
2f3238aeb module: add flags... |
2831 |
err = check_modinfo(mod, info, flags); |
40dd2560e module: refactor ... |
2832 2833 |
if (err) return ERR_PTR(err); |
1da177e4c Linux-2.6.12-rc2 |
2834 |
|
1da177e4c Linux-2.6.12-rc2 |
2835 |
/* Allow arches to frob section contents and sizes. */ |
49668688d module: pass load... |
2836 2837 |
err = module_frob_arch_sections(info->hdr, info->sechdrs, info->secstrings, mod); |
1da177e4c Linux-2.6.12-rc2 |
2838 |
if (err < 0) |
6526c534b module: move modu... |
2839 |
goto out; |
1da177e4c Linux-2.6.12-rc2 |
2840 |
|
49668688d module: pass load... |
2841 2842 |
pcpusec = &info->sechdrs[info->index.pcpu]; if (pcpusec->sh_size) { |
1da177e4c Linux-2.6.12-rc2 |
2843 |
/* We have a special allocation for this section. */ |
49668688d module: pass load... |
2844 2845 |
err = percpu_modalloc(mod, pcpusec->sh_size, pcpusec->sh_addralign); |
259354dea module: encapsula... |
2846 |
if (err) |
6526c534b module: move modu... |
2847 |
goto out; |
49668688d module: pass load... |
2848 |
pcpusec->sh_flags &= ~(unsigned long)SHF_ALLOC; |
1da177e4c Linux-2.6.12-rc2 |
2849 2850 2851 2852 2853 |
} /* Determine total sizes, and put offsets in sh_entsize. For now this is done generically; there doesn't appear to be any special cases for the architectures. */ |
49668688d module: pass load... |
2854 |
layout_sections(mod, info); |
49668688d module: pass load... |
2855 |
layout_symtab(mod, info); |
1da177e4c Linux-2.6.12-rc2 |
2856 |
|
65b8a9b4d module: refactor ... |
2857 |
/* Allocate and move to the final place */ |
49668688d module: pass load... |
2858 |
err = move_module(mod, info); |
d913188c7 module: layout_an... |
2859 |
if (err) |
48fd11880 module: Fix perfo... |
2860 |
goto free_percpu; |
d913188c7 module: layout_an... |
2861 2862 2863 |
/* Module has been copied to its final place now: return it. */ mod = (void *)info->sechdrs[info->index.mod].sh_addr; |
49668688d module: pass load... |
2864 |
kmemleak_load_module(mod, info); |
d913188c7 module: layout_an... |
2865 |
return mod; |
d913188c7 module: layout_an... |
2866 2867 |
free_percpu: percpu_modfree(mod); |
6526c534b module: move modu... |
2868 |
out: |
d913188c7 module: layout_an... |
2869 2870 2871 2872 2873 2874 |
return ERR_PTR(err); } /* mod is no longer valid after this! */ static void module_deallocate(struct module *mod, struct load_info *info) { |
d913188c7 module: layout_an... |
2875 2876 2877 2878 |
percpu_modfree(mod); module_free(mod, mod->module_init); module_free(mod, mod->module_core); } |
74e08fcf7 modules: add defa... |
2879 2880 2881 2882 2883 2884 |
int __weak module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *me) { return 0; } |
811d66a0e module: group pos... |
2885 2886 |
static int post_relocation(struct module *mod, const struct load_info *info) { |
51f3d0f47 module: cleanup c... |
2887 |
/* Sort exception table now relocations are done. */ |
811d66a0e module: group pos... |
2888 2889 2890 2891 2892 |
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); |
51f3d0f47 module: cleanup c... |
2893 |
/* Setup kallsyms-specific fields. */ |
811d66a0e module: group pos... |
2894 2895 2896 2897 2898 |
add_kallsyms(mod, info); /* Arch-specific module finalizing. */ return module_finalize(info->hdr, info->sechdrs, mod); } |
9bb9c3be5 module: wait when... |
2899 2900 2901 2902 2903 2904 2905 |
/* Is this module of this name done loading? No locks held. */ static bool finished_loading(const char *name) { struct module *mod; bool ret; mutex_lock(&module_mutex); |
1fb9341ac module: put modul... |
2906 |
mod = find_module_all(name, true); |
0d21b0e34 module: add new s... |
2907 2908 |
ret = !mod || mod->state == MODULE_STATE_LIVE || mod->state == MODULE_STATE_GOING; |
9bb9c3be5 module: wait when... |
2909 2910 2911 2912 |
mutex_unlock(&module_mutex); return ret; } |
34e1169d9 module: add sysca... |
2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 |
/* Call module constructors. */ static void do_mod_ctors(struct module *mod) { #ifdef CONFIG_CONSTRUCTORS unsigned long i; for (i = 0; i < mod->num_ctors; i++) mod->ctors[i](); #endif } /* This is where the real work happens */ static int do_init_module(struct module *mod) { int ret = 0; |
774a1221e module, async: as... |
2928 2929 2930 2931 2932 |
/* * We want to find out whether @mod uses async during init. Clear * PF_USED_ASYNC. async_schedule*() will set it. */ current->flags &= ~PF_USED_ASYNC; |
34e1169d9 module: add sysca... |
2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_COMING, mod); /* Set RO and NX regions for core */ set_section_ro_nx(mod->module_core, mod->core_text_size, mod->core_ro_size, mod->core_size); /* Set RO and NX regions for init */ set_section_ro_nx(mod->module_init, mod->init_text_size, mod->init_ro_size, mod->init_size); do_mod_ctors(mod); /* Start the module */ if (mod->init != NULL) ret = do_one_initcall(mod->init); if (ret < 0) { /* Init routine failed: abort. Try to protect us from buggy refcounters. */ mod->state = MODULE_STATE_GOING; synchronize_sched(); module_put(mod); blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); free_module(mod); wake_up_all(&module_wq); return ret; } if (ret > 0) { printk(KERN_WARNING "%s: '%s'->init suspiciously returned %d, it should follow 0/-E convention " "%s: loading module anyway... ", __func__, mod->name, ret, __func__); dump_stack(); } /* Now it's a first class citizen! */ mod->state = MODULE_STATE_LIVE; blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_LIVE, mod); |
774a1221e module, async: as... |
2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 |
/* * We need to finish all async code before the module init sequence * is done. This has potential to deadlock. For example, a newly * detected block device can trigger request_module() of the * default iosched from async probing task. Once userland helper * reaches here, async_synchronize_full() will wait on the async * task waiting on request_module() and deadlock. * * This deadlock is avoided by perfomring async_synchronize_full() * iff module init queued any async jobs. This isn't a full * solution as it will deadlock the same if module loading from * async jobs nests more than once; however, due to the various * constraints, this hack seems to be the best option for now. * Please refer to the following thread for details. * * http://thread.gmane.org/gmane.linux.kernel/1420814 */ if (current->flags & PF_USED_ASYNC) async_synchronize_full(); |
34e1169d9 module: add sysca... |
2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 |
mutex_lock(&module_mutex); /* Drop initial reference. */ module_put(mod); trim_init_extable(mod); #ifdef CONFIG_KALLSYMS mod->num_symtab = mod->core_num_syms; mod->symtab = mod->core_symtab; mod->strtab = mod->core_strtab; #endif unset_module_init_ro_nx(mod); module_free(mod, mod->module_init); mod->module_init = NULL; mod->init_size = 0; mod->init_ro_size = 0; mod->init_text_size = 0; mutex_unlock(&module_mutex); wake_up_all(&module_wq); return 0; } static int may_init_module(void) { if (!capable(CAP_SYS_MODULE) || modules_disabled) return -EPERM; return 0; } |
a3535c7e4 module: clean up ... |
3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 |
/* * We try to place it in the list now to make sure it's unique before * we dedicate too many resources. In particular, temporary percpu * memory exhaustion. */ static int add_unformed_module(struct module *mod) { int err; struct module *old; mod->state = MODULE_STATE_UNFORMED; again: mutex_lock(&module_mutex); if ((old = find_module_all(mod->name, true)) != NULL) { if (old->state == MODULE_STATE_COMING || old->state == MODULE_STATE_UNFORMED) { /* Wait in case it fails to load. */ mutex_unlock(&module_mutex); err = wait_event_interruptible(module_wq, finished_loading(mod->name)); if (err) goto out_unlocked; goto again; } err = -EEXIST; goto out; } list_add_rcu(&mod->list, &modules); err = 0; out: mutex_unlock(&module_mutex); out_unlocked: return err; } static int complete_formation(struct module *mod, struct load_info *info) { int err; mutex_lock(&module_mutex); /* Find duplicate symbols (must be called under lock). */ err = verify_export_symbols(mod); if (err < 0) goto out; /* This relies on module_mutex for list integrity. */ module_bug_finalize(info->hdr, info->sechdrs, mod); /* Mark state as coming so strong_try_module_get() ignores us, * but kallsyms etc. can see us. */ mod->state = MODULE_STATE_COMING; out: mutex_unlock(&module_mutex); return err; } |
d913188c7 module: layout_an... |
3086 3087 |
/* Allocate and load the module: note that size of section 0 is always zero, and we rely on this for optional sections. */ |
2f3238aeb module: add flags... |
3088 3089 |
static int load_module(struct load_info *info, const char __user *uargs, int flags) |
d913188c7 module: layout_an... |
3090 |
{ |
a3535c7e4 module: clean up ... |
3091 |
struct module *mod; |
d913188c7 module: layout_an... |
3092 |
long err; |
d913188c7 module: layout_an... |
3093 |
|
34e1169d9 module: add sysca... |
3094 3095 3096 |
err = module_sig_check(info); if (err) goto free_copy; |
d913188c7 module: layout_an... |
3097 |
|
34e1169d9 module: add sysca... |
3098 |
err = elf_header_check(info); |
d913188c7 module: layout_an... |
3099 |
if (err) |
34e1169d9 module: add sysca... |
3100 |
goto free_copy; |
d913188c7 module: layout_an... |
3101 3102 |
/* Figure out module layout, and allocate all the memory. */ |
2f3238aeb module: add flags... |
3103 |
mod = layout_and_allocate(info, flags); |
65b8a9b4d module: refactor ... |
3104 3105 |
if (IS_ERR(mod)) { err = PTR_ERR(mod); |
d913188c7 module: layout_an... |
3106 |
goto free_copy; |
1da177e4c Linux-2.6.12-rc2 |
3107 |
} |
1da177e4c Linux-2.6.12-rc2 |
3108 |
|
a3535c7e4 module: clean up ... |
3109 3110 3111 |
/* Reserve our place in the list. */ err = add_unformed_module(mod); if (err) |
1fb9341ac module: put modul... |
3112 |
goto free_module; |
1fb9341ac module: put modul... |
3113 |
|
106a4ee25 module: signature... |
3114 |
#ifdef CONFIG_MODULE_SIG |
34e1169d9 module: add sysca... |
3115 |
mod->sig_ok = info->sig_ok; |
64748a2c9 module: printk me... |
3116 3117 3118 3119 3120 3121 |
if (!mod->sig_ok) { printk_once(KERN_NOTICE "%s: module verification failed: signature and/or" " required key missing - tainting kernel ", mod->name); |
373d4d099 taint: add explic... |
3122 |
add_taint_module(mod, TAINT_FORCED_MODULE, LOCKDEP_STILL_OK); |
64748a2c9 module: printk me... |
3123 |
} |
106a4ee25 module: signature... |
3124 |
#endif |
49668688d module: pass load... |
3125 |
/* Now module is in final location, initialize linked lists, etc. */ |
9f85a4bbb module: refactor ... |
3126 3127 |
err = module_unload_init(mod); if (err) |
1fb9341ac module: put modul... |
3128 |
goto unlink_mod; |
1da177e4c Linux-2.6.12-rc2 |
3129 |
|
22e268ebe module: refactor ... |
3130 3131 |
/* Now we've got everything in the final locations, we can * find optional sections. */ |
34e1169d9 module: add sysca... |
3132 |
find_module_sections(mod, info); |
9b37ccfc6 module: allow ndi... |
3133 |
|
49668688d module: pass load... |
3134 |
err = check_module_license_and_versions(mod); |
22e268ebe module: refactor ... |
3135 3136 |
if (err) goto free_unload; |
9841d61d7 [PATCH] Add taint... |
3137 |
|
c988d2b28 [PATCH] modules: ... |
3138 |
/* Set up MODINFO_ATTR fields */ |
34e1169d9 module: add sysca... |
3139 |
setup_modinfo(mod, info); |
c988d2b28 [PATCH] modules: ... |
3140 |
|
1da177e4c Linux-2.6.12-rc2 |
3141 |
/* Fix up syms, so that st_value is a pointer to location. */ |
34e1169d9 module: add sysca... |
3142 |
err = simplify_symbols(mod, info); |
1da177e4c Linux-2.6.12-rc2 |
3143 |
if (err < 0) |
d913188c7 module: layout_an... |
3144 |
goto free_modinfo; |
1da177e4c Linux-2.6.12-rc2 |
3145 |
|
34e1169d9 module: add sysca... |
3146 |
err = apply_relocations(mod, info); |
22e268ebe module: refactor ... |
3147 |
if (err < 0) |
d913188c7 module: layout_an... |
3148 |
goto free_modinfo; |
1da177e4c Linux-2.6.12-rc2 |
3149 |
|
34e1169d9 module: add sysca... |
3150 |
err = post_relocation(mod, info); |
1da177e4c Linux-2.6.12-rc2 |
3151 |
if (err < 0) |
d913188c7 module: layout_an... |
3152 |
goto free_modinfo; |
1da177e4c Linux-2.6.12-rc2 |
3153 |
|
22e268ebe module: refactor ... |
3154 |
flush_module_icache(mod); |
378bac820 [PATCH] flush ica... |
3155 |
|
6526c534b module: move modu... |
3156 3157 3158 3159 3160 3161 |
/* Now copy in args */ mod->args = strndup_user(uargs, ~0UL >> 1); if (IS_ERR(mod->args)) { err = PTR_ERR(mod->args); goto free_arch_cleanup; } |
8d3b33f67 [PATCH] Remove MO... |
3162 |
|
34e1169d9 module: add sysca... |
3163 |
dynamic_debug_setup(info->debug, info->num_debug); |
ff49d74ad module: initializ... |
3164 |
|
a3535c7e4 module: clean up ... |
3165 3166 3167 |
/* Finally it's fully formed, ready to start executing. */ err = complete_formation(mod, info); if (err) |
1fb9341ac module: put modul... |
3168 |
goto ddebug_cleanup; |
be593f4ce module: verify_ex... |
3169 |
|
51f3d0f47 module: cleanup c... |
3170 |
/* Module is ready to execute: parsing args may do that. */ |
026cee008 params: <level>_i... |
3171 |
err = parse_args(mod->name, mod->args, mod->kp, mod->num_kp, |
b48420c1d dynamic_debug: ma... |
3172 |
-32768, 32767, &ddebug_dyndbg_module_param_cb); |
1da177e4c Linux-2.6.12-rc2 |
3173 |
if (err < 0) |
1fb9341ac module: put modul... |
3174 |
goto bug_cleanup; |
1da177e4c Linux-2.6.12-rc2 |
3175 |
|
51f3d0f47 module: cleanup c... |
3176 |
/* Link in to syfs. */ |
34e1169d9 module: add sysca... |
3177 |
err = mod_sysfs_setup(mod, info, mod->kp, mod->num_kp); |
1da177e4c Linux-2.6.12-rc2 |
3178 |
if (err < 0) |
1fb9341ac module: put modul... |
3179 |
goto bug_cleanup; |
80a3d1bb4 module: move sysf... |
3180 |
|
48fd11880 module: Fix perfo... |
3181 |
/* Get rid of temporary copy. */ |
34e1169d9 module: add sysca... |
3182 |
free_copy(info); |
1da177e4c Linux-2.6.12-rc2 |
3183 3184 |
/* Done! */ |
51f3d0f47 module: cleanup c... |
3185 |
trace_module_load(mod); |
34e1169d9 module: add sysca... |
3186 3187 |
return do_init_module(mod); |
1da177e4c Linux-2.6.12-rc2 |
3188 |
|
1fb9341ac module: put modul... |
3189 3190 |
bug_cleanup: /* module_bug_cleanup needs module_mutex protection */ |
75676500f module: make lock... |
3191 |
mutex_lock(&module_mutex); |
5336377d6 modules: Fix modu... |
3192 |
module_bug_cleanup(mod); |
ee61abb32 module: fix missi... |
3193 |
mutex_unlock(&module_mutex); |
a3535c7e4 module: clean up ... |
3194 |
ddebug_cleanup: |
1fb9341ac module: put modul... |
3195 |
dynamic_debug_remove(info->debug); |
e91defa26 module: don't use... |
3196 |
synchronize_sched(); |
6526c534b module: move modu... |
3197 3198 |
kfree(mod->args); free_arch_cleanup: |
1da177e4c Linux-2.6.12-rc2 |
3199 |
module_arch_cleanup(mod); |
d913188c7 module: layout_an... |
3200 |
free_modinfo: |
a263f7763 module: fix memor... |
3201 |
free_modinfo(mod); |
22e268ebe module: refactor ... |
3202 |
free_unload: |
1da177e4c Linux-2.6.12-rc2 |
3203 |
module_unload_free(mod); |
1fb9341ac module: put modul... |
3204 3205 3206 3207 3208 3209 |
unlink_mod: mutex_lock(&module_mutex); /* Unlink carefully: kallsyms could be walking list. */ list_del_rcu(&mod->list); wake_up_all(&module_wq); mutex_unlock(&module_mutex); |
d913188c7 module: layout_an... |
3210 |
free_module: |
34e1169d9 module: add sysca... |
3211 |
module_deallocate(mod, info); |
d913188c7 module: layout_an... |
3212 |
free_copy: |
34e1169d9 module: add sysca... |
3213 3214 |
free_copy(info); return err; |
b99b87f70 kernel: construct... |
3215 |
} |
17da2bd90 [CVE-2009-0029] S... |
3216 3217 |
SYSCALL_DEFINE3(init_module, void __user *, umod, unsigned long, len, const char __user *, uargs) |
1da177e4c Linux-2.6.12-rc2 |
3218 |
{ |
34e1169d9 module: add sysca... |
3219 3220 |
int err; struct load_info info = { }; |
1da177e4c Linux-2.6.12-rc2 |
3221 |
|
34e1169d9 module: add sysca... |
3222 3223 3224 |
err = may_init_module(); if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
3225 |
|
34e1169d9 module: add sysca... |
3226 3227 3228 |
pr_debug("init_module: umod=%p, len=%lu, uargs=%p ", umod, len, uargs); |
1da177e4c Linux-2.6.12-rc2 |
3229 |
|
34e1169d9 module: add sysca... |
3230 3231 3232 |
err = copy_module_from_user(umod, len, &info); if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
3233 |
|
2f3238aeb module: add flags... |
3234 |
return load_module(&info, uargs, 0); |
34e1169d9 module: add sysca... |
3235 |
} |
94462ad3b module: Move RO/N... |
3236 |
|
2f3238aeb module: add flags... |
3237 |
SYSCALL_DEFINE3(finit_module, int, fd, const char __user *, uargs, int, flags) |
34e1169d9 module: add sysca... |
3238 3239 3240 |
{ int err; struct load_info info = { }; |
94462ad3b module: Move RO/N... |
3241 |
|
34e1169d9 module: add sysca... |
3242 3243 3244 |
err = may_init_module(); if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
3245 |
|
2f3238aeb module: add flags... |
3246 3247 |
pr_debug("finit_module: fd=%d, uargs=%p, flags=%i ", fd, uargs, flags); |
6c5db22d2 modules: fix modu... |
3248 |
|
2f3238aeb module: add flags... |
3249 3250 3251 |
if (flags & ~(MODULE_INIT_IGNORE_MODVERSIONS |MODULE_INIT_IGNORE_VERMAGIC)) return -EINVAL; |
d6de2c80e async: Fix module... |
3252 |
|
34e1169d9 module: add sysca... |
3253 3254 3255 |
err = copy_module_from_fd(fd, &info); if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
3256 |
|
2f3238aeb module: add flags... |
3257 |
return load_module(&info, uargs, flags); |
1da177e4c Linux-2.6.12-rc2 |
3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 |
} static inline int within(unsigned long addr, void *start, unsigned long size) { return ((void *)addr >= start && (void *)addr < start + size); } #ifdef CONFIG_KALLSYMS /* * This ignores the intensely annoying "mapping symbols" found * in ARM ELF files: $a, $t and $d. */ static inline int is_arm_mapping_symbol(const char *str) { |
22a8bdeb5 whitespace fixes:... |
3272 |
return str[0] == '$' && strchr("atd", str[1]) |
1da177e4c Linux-2.6.12-rc2 |
3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 |
&& (str[2] == '\0' || str[2] == '.'); } static const char *get_ksymbol(struct module *mod, unsigned long addr, unsigned long *size, unsigned long *offset) { unsigned int i, best = 0; unsigned long nextval; /* At worse, next value is at end of module */ |
a06f6211e module: add withi... |
3285 |
if (within_module_init(addr, mod)) |
1da177e4c Linux-2.6.12-rc2 |
3286 |
nextval = (unsigned long)mod->module_init+mod->init_text_size; |
22a8bdeb5 whitespace fixes:... |
3287 |
else |
1da177e4c Linux-2.6.12-rc2 |
3288 |
nextval = (unsigned long)mod->module_core+mod->core_text_size; |
25985edce Fix common misspe... |
3289 |
/* Scan for closest preceding symbol, and next symbol. (ELF |
22a8bdeb5 whitespace fixes:... |
3290 |
starts real symbols at 1). */ |
1da177e4c Linux-2.6.12-rc2 |
3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 |
for (i = 1; i < mod->num_symtab; i++) { if (mod->symtab[i].st_shndx == SHN_UNDEF) continue; /* We ignore unnamed symbols: they're uninformative * and inserted at a whim. */ if (mod->symtab[i].st_value <= addr && mod->symtab[i].st_value > mod->symtab[best].st_value && *(mod->strtab + mod->symtab[i].st_name) != '\0' && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name)) best = i; if (mod->symtab[i].st_value > addr && mod->symtab[i].st_value < nextval && *(mod->strtab + mod->symtab[i].st_name) != '\0' && !is_arm_mapping_symbol(mod->strtab + mod->symtab[i].st_name)) nextval = mod->symtab[i].st_value; } if (!best) return NULL; |
ffb451227 Simplify kallsyms... |
3311 3312 3313 3314 |
if (size) *size = nextval - mod->symtab[best].st_value; if (offset) *offset = addr - mod->symtab[best].st_value; |
1da177e4c Linux-2.6.12-rc2 |
3315 3316 |
return mod->strtab + mod->symtab[best].st_name; } |
6dd06c9fb module: make modu... |
3317 3318 |
/* For kallsyms to ask for address resolution. NULL means not found. Careful * not to lock to avoid deadlock on oopses, simply disable preemption. */ |
92dfc9dc7 fix "modules: mak... |
3319 |
const char *module_address_lookup(unsigned long addr, |
6dd06c9fb module: make modu... |
3320 3321 3322 3323 |
unsigned long *size, unsigned long *offset, char **modname, char *namebuf) |
1da177e4c Linux-2.6.12-rc2 |
3324 3325 |
{ struct module *mod; |
cb2a52052 modules: de-mutex... |
3326 |
const char *ret = NULL; |
1da177e4c Linux-2.6.12-rc2 |
3327 |
|
cb2a52052 modules: de-mutex... |
3328 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3329 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3330 3331 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
a06f6211e module: add withi... |
3332 3333 |
if (within_module_init(addr, mod) || within_module_core(addr, mod)) { |
ffc508919 [PATCH] Create ka... |
3334 3335 |
if (modname) *modname = mod->name; |
cb2a52052 modules: de-mutex... |
3336 3337 |
ret = get_ksymbol(mod, addr, size, offset); break; |
1da177e4c Linux-2.6.12-rc2 |
3338 3339 |
} } |
6dd06c9fb module: make modu... |
3340 3341 3342 3343 3344 |
/* Make a copy in here where it's safe */ if (ret) { strncpy(namebuf, ret, KSYM_NAME_LEN - 1); ret = namebuf; } |
cb2a52052 modules: de-mutex... |
3345 |
preempt_enable(); |
92dfc9dc7 fix "modules: mak... |
3346 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
3347 |
} |
9d65cb4a1 Fix race between ... |
3348 3349 3350 |
int lookup_module_symbol_name(unsigned long addr, char *symname) { struct module *mod; |
cb2a52052 modules: de-mutex... |
3351 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3352 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3353 3354 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
a06f6211e module: add withi... |
3355 3356 |
if (within_module_init(addr, mod) || within_module_core(addr, mod)) { |
9d65cb4a1 Fix race between ... |
3357 3358 3359 3360 3361 |
const char *sym; sym = get_ksymbol(mod, addr, NULL, NULL); if (!sym) goto out; |
9281acea6 kallsyms: make KS... |
3362 |
strlcpy(symname, sym, KSYM_NAME_LEN); |
cb2a52052 modules: de-mutex... |
3363 |
preempt_enable(); |
9d65cb4a1 Fix race between ... |
3364 3365 3366 3367 |
return 0; } } out: |
cb2a52052 modules: de-mutex... |
3368 |
preempt_enable(); |
9d65cb4a1 Fix race between ... |
3369 3370 |
return -ERANGE; } |
a5c43dae7 Fix race between ... |
3371 3372 3373 3374 |
int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size, unsigned long *offset, char *modname, char *name) { struct module *mod; |
cb2a52052 modules: de-mutex... |
3375 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3376 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3377 3378 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
a06f6211e module: add withi... |
3379 3380 |
if (within_module_init(addr, mod) || within_module_core(addr, mod)) { |
a5c43dae7 Fix race between ... |
3381 3382 3383 3384 3385 3386 |
const char *sym; sym = get_ksymbol(mod, addr, size, offset); if (!sym) goto out; if (modname) |
9281acea6 kallsyms: make KS... |
3387 |
strlcpy(modname, mod->name, MODULE_NAME_LEN); |
a5c43dae7 Fix race between ... |
3388 |
if (name) |
9281acea6 kallsyms: make KS... |
3389 |
strlcpy(name, sym, KSYM_NAME_LEN); |
cb2a52052 modules: de-mutex... |
3390 |
preempt_enable(); |
a5c43dae7 Fix race between ... |
3391 3392 3393 3394 |
return 0; } } out: |
cb2a52052 modules: de-mutex... |
3395 |
preempt_enable(); |
a5c43dae7 Fix race between ... |
3396 3397 |
return -ERANGE; } |
ea07890a6 Fix race between ... |
3398 3399 |
int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type, char *name, char *module_name, int *exported) |
1da177e4c Linux-2.6.12-rc2 |
3400 3401 |
{ struct module *mod; |
cb2a52052 modules: de-mutex... |
3402 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3403 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3404 3405 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
1da177e4c Linux-2.6.12-rc2 |
3406 3407 3408 |
if (symnum < mod->num_symtab) { *value = mod->symtab[symnum].st_value; *type = mod->symtab[symnum].st_info; |
098c5eea0 [PATCH] null-term... |
3409 |
strlcpy(name, mod->strtab + mod->symtab[symnum].st_name, |
9281acea6 kallsyms: make KS... |
3410 3411 |
KSYM_NAME_LEN); strlcpy(module_name, mod->name, MODULE_NAME_LEN); |
ca4787b77 kernel/module.c: ... |
3412 |
*exported = is_exported(name, *value, mod); |
cb2a52052 modules: de-mutex... |
3413 |
preempt_enable(); |
ea07890a6 Fix race between ... |
3414 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
3415 3416 3417 |
} symnum -= mod->num_symtab; } |
cb2a52052 modules: de-mutex... |
3418 |
preempt_enable(); |
ea07890a6 Fix race between ... |
3419 |
return -ERANGE; |
1da177e4c Linux-2.6.12-rc2 |
3420 3421 3422 3423 3424 3425 3426 |
} static unsigned long mod_find_symname(struct module *mod, const char *name) { unsigned int i; for (i = 0; i < mod->num_symtab; i++) |
54e8ce463 [PATCH] Tell kall... |
3427 3428 |
if (strcmp(name, mod->strtab+mod->symtab[i].st_name) == 0 && mod->symtab[i].st_info != 'U') |
1da177e4c Linux-2.6.12-rc2 |
3429 3430 3431 3432 3433 3434 3435 3436 3437 3438 3439 3440 |
return mod->symtab[i].st_value; return 0; } /* Look for this name: can be of form module:name. */ unsigned long module_kallsyms_lookup_name(const char *name) { struct module *mod; char *colon; unsigned long ret = 0; /* Don't lock: we're in enough trouble already. */ |
cb2a52052 modules: de-mutex... |
3441 |
preempt_disable(); |
1da177e4c Linux-2.6.12-rc2 |
3442 3443 3444 3445 3446 3447 |
if ((colon = strchr(name, ':')) != NULL) { *colon = '\0'; if ((mod = find_module(name)) != NULL) ret = mod_find_symname(mod, colon+1); *colon = ':'; } else { |
0d21b0e34 module: add new s... |
3448 3449 3450 |
list_for_each_entry_rcu(mod, &modules, list) { if (mod->state == MODULE_STATE_UNFORMED) continue; |
1da177e4c Linux-2.6.12-rc2 |
3451 3452 |
if ((ret = mod_find_symname(mod, name)) != 0) break; |
0d21b0e34 module: add new s... |
3453 |
} |
1da177e4c Linux-2.6.12-rc2 |
3454 |
} |
cb2a52052 modules: de-mutex... |
3455 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
3456 3457 |
return ret; } |
75a66614d Ksplice: Add func... |
3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 |
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) { |
0d21b0e34 module: add new s... |
3468 3469 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
75a66614d Ksplice: Add func... |
3470 3471 3472 3473 3474 3475 3476 3477 3478 |
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; } |
1da177e4c Linux-2.6.12-rc2 |
3479 |
#endif /* CONFIG_KALLSYMS */ |
21aa9280b debug: show being... |
3480 |
static char *module_flags(struct module *mod, char *buf) |
fa3ba2e81 [PATCH] fix Modul... |
3481 3482 |
{ int bx = 0; |
0d21b0e34 module: add new s... |
3483 |
BUG_ON(mod->state == MODULE_STATE_UNFORMED); |
21aa9280b debug: show being... |
3484 3485 3486 |
if (mod->taints || mod->state == MODULE_STATE_GOING || mod->state == MODULE_STATE_COMING) { |
fa3ba2e81 [PATCH] fix Modul... |
3487 |
buf[bx++] = '('; |
cca3e7073 modules: sysfs - ... |
3488 |
bx += module_flags_taint(mod, buf + bx); |
21aa9280b debug: show being... |
3489 3490 3491 3492 3493 3494 |
/* Show a - for module-is-being-unloaded */ if (mod->state == MODULE_STATE_GOING) buf[bx++] = '-'; /* Show a + for module-is-being-loaded */ if (mod->state == MODULE_STATE_COMING) buf[bx++] = '+'; |
fa3ba2e81 [PATCH] fix Modul... |
3495 3496 3497 3498 3499 3500 |
buf[bx++] = ')'; } buf[bx] = '\0'; return buf; } |
3b5d5c6b0 proc: move /proc/... |
3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517 |
#ifdef CONFIG_PROC_FS /* Called by the /proc file system to return a list of modules. */ static void *m_start(struct seq_file *m, loff_t *pos) { mutex_lock(&module_mutex); return seq_list_start(&modules, *pos); } static void *m_next(struct seq_file *m, void *p, loff_t *pos) { return seq_list_next(p, &modules, pos); } static void m_stop(struct seq_file *m, void *p) { mutex_unlock(&module_mutex); } |
1da177e4c Linux-2.6.12-rc2 |
3518 3519 3520 |
static int m_show(struct seq_file *m, void *p) { struct module *mod = list_entry(p, struct module, list); |
fa3ba2e81 [PATCH] fix Modul... |
3521 |
char buf[8]; |
0d21b0e34 module: add new s... |
3522 3523 3524 |
/* We always ignore unformed modules. */ if (mod->state == MODULE_STATE_UNFORMED) return 0; |
2f0f2a334 module: turn long... |
3525 |
seq_printf(m, "%s %u", |
1da177e4c Linux-2.6.12-rc2 |
3526 3527 3528 3529 3530 3531 3532 3533 3534 |
mod->name, mod->init_size + mod->core_size); print_unload_info(m, mod); /* Informative for users. */ seq_printf(m, " %s", mod->state == MODULE_STATE_GOING ? "Unloading": mod->state == MODULE_STATE_COMING ? "Loading": "Live"); /* Used by oprofile and other similar tools. */ |
9f36e2c44 printk: use %pK f... |
3535 |
seq_printf(m, " 0x%pK", mod->module_core); |
1da177e4c Linux-2.6.12-rc2 |
3536 |
|
fa3ba2e81 [PATCH] fix Modul... |
3537 3538 |
/* Taints info */ if (mod->taints) |
21aa9280b debug: show being... |
3539 |
seq_printf(m, " %s", module_flags(mod, buf)); |
fa3ba2e81 [PATCH] fix Modul... |
3540 |
|
1da177e4c Linux-2.6.12-rc2 |
3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 |
seq_printf(m, " "); return 0; } /* Format: modulename size refcount deps address Where refcount is a number or -, and deps is a comma-separated list of depends or -. */ |
3b5d5c6b0 proc: move /proc/... |
3551 |
static const struct seq_operations modules_op = { |
1da177e4c Linux-2.6.12-rc2 |
3552 3553 3554 3555 3556 |
.start = m_start, .next = m_next, .stop = m_stop, .show = m_show }; |
3b5d5c6b0 proc: move /proc/... |
3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 |
static int modules_open(struct inode *inode, struct file *file) { return seq_open(file, &modules_op); } static const struct file_operations proc_modules_operations = { .open = modules_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; static int __init proc_modules_init(void) { proc_create("modules", 0, NULL, &proc_modules_operations); return 0; } module_init(proc_modules_init); #endif |
1da177e4c Linux-2.6.12-rc2 |
3576 3577 3578 |
/* Given an address, look for it in the module exception tables. */ const struct exception_table_entry *search_module_extables(unsigned long addr) { |
1da177e4c Linux-2.6.12-rc2 |
3579 3580 |
const struct exception_table_entry *e = NULL; struct module *mod; |
24da1cbff modules: remove m... |
3581 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3582 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3583 3584 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
1da177e4c Linux-2.6.12-rc2 |
3585 3586 |
if (mod->num_exentries == 0) continue; |
22a8bdeb5 whitespace fixes:... |
3587 |
|
1da177e4c Linux-2.6.12-rc2 |
3588 3589 3590 3591 3592 3593 |
e = search_extable(mod->extable, mod->extable + mod->num_exentries - 1, addr); if (e) break; } |
24da1cbff modules: remove m... |
3594 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
3595 3596 |
/* Now, if we found one, we are running inside it now, hence |
22a8bdeb5 whitespace fixes:... |
3597 |
we cannot unload the module, hence no refcnt needed. */ |
1da177e4c Linux-2.6.12-rc2 |
3598 3599 |
return e; } |
4d435f9d8 [PATCH] lockdep: ... |
3600 |
/* |
e610499e2 module: __module_... |
3601 3602 3603 3604 3605 |
* is_module_address - is this address inside a module? * @addr: the address to check. * * See is_module_text_address() if you simply want to see if the address * is code (not data). |
4d435f9d8 [PATCH] lockdep: ... |
3606 |
*/ |
e610499e2 module: __module_... |
3607 |
bool is_module_address(unsigned long addr) |
4d435f9d8 [PATCH] lockdep: ... |
3608 |
{ |
e610499e2 module: __module_... |
3609 |
bool ret; |
4d435f9d8 [PATCH] lockdep: ... |
3610 |
|
24da1cbff modules: remove m... |
3611 |
preempt_disable(); |
e610499e2 module: __module_... |
3612 |
ret = __module_address(addr) != NULL; |
24da1cbff modules: remove m... |
3613 |
preempt_enable(); |
4d435f9d8 [PATCH] lockdep: ... |
3614 |
|
e610499e2 module: __module_... |
3615 |
return ret; |
4d435f9d8 [PATCH] lockdep: ... |
3616 |
} |
e610499e2 module: __module_... |
3617 3618 3619 3620 3621 3622 3623 |
/* * __module_address - get the module which contains an address. * @addr: the address. * * Must be called with preempt disabled or module mutex held so that * module doesn't get freed during this. */ |
714f83d5d Merge branch 'tra... |
3624 |
struct module *__module_address(unsigned long addr) |
1da177e4c Linux-2.6.12-rc2 |
3625 3626 |
{ struct module *mod; |
3a642e99b modules: Take a s... |
3627 3628 |
if (addr < module_addr_min || addr > module_addr_max) return NULL; |
0d21b0e34 module: add new s... |
3629 3630 3631 |
list_for_each_entry_rcu(mod, &modules, list) { if (mod->state == MODULE_STATE_UNFORMED) continue; |
e610499e2 module: __module_... |
3632 3633 |
if (within_module_core(addr, mod) || within_module_init(addr, mod)) |
1da177e4c Linux-2.6.12-rc2 |
3634 |
return mod; |
0d21b0e34 module: add new s... |
3635 |
} |
1da177e4c Linux-2.6.12-rc2 |
3636 3637 |
return NULL; } |
c6b378019 module: Export sy... |
3638 |
EXPORT_SYMBOL_GPL(__module_address); |
1da177e4c Linux-2.6.12-rc2 |
3639 |
|
e610499e2 module: __module_... |
3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 |
/* * is_module_text_address - is this address inside module code? * @addr: the address to check. * * See is_module_address() if you simply want to see if the address is * anywhere in a module. See kernel_text_address() for testing if an * address corresponds to kernel or module code. */ bool is_module_text_address(unsigned long addr) { bool ret; preempt_disable(); ret = __module_text_address(addr) != NULL; preempt_enable(); return ret; } /* * __module_text_address - get the module whose code contains an address. * @addr: the address. * * Must be called with preempt disabled or module mutex held so that * module doesn't get freed during this. */ struct module *__module_text_address(unsigned long addr) { struct module *mod = __module_address(addr); if (mod) { /* Make sure it's within the text section. */ if (!within(addr, mod->module_init, mod->init_text_size) && !within(addr, mod->module_core, mod->core_text_size)) mod = NULL; } return mod; } |
c6b378019 module: Export sy... |
3677 |
EXPORT_SYMBOL_GPL(__module_text_address); |
e610499e2 module: __module_... |
3678 |
|
1da177e4c Linux-2.6.12-rc2 |
3679 3680 3681 3682 |
/* Don't grab lock, we're oopsing. */ void print_modules(void) { struct module *mod; |
2bc2d61a9 [PATCH] list modu... |
3683 |
char buf[8]; |
1da177e4c Linux-2.6.12-rc2 |
3684 |
|
b231125af printk: add KERN_... |
3685 |
printk(KERN_DEFAULT "Modules linked in:"); |
d72b37513 Remove stop_machi... |
3686 3687 |
/* Most callers should already have preempt disabled, but make sure */ preempt_disable(); |
0d21b0e34 module: add new s... |
3688 3689 3690 |
list_for_each_entry_rcu(mod, &modules, list) { if (mod->state == MODULE_STATE_UNFORMED) continue; |
21aa9280b debug: show being... |
3691 |
printk(" %s%s", mod->name, module_flags(mod, buf)); |
0d21b0e34 module: add new s... |
3692 |
} |
d72b37513 Remove stop_machi... |
3693 |
preempt_enable(); |
e14af7eeb debug: track and ... |
3694 3695 |
if (last_unloaded_module[0]) printk(" [last unloaded: %s]", last_unloaded_module); |
1da177e4c Linux-2.6.12-rc2 |
3696 3697 3698 |
printk(" "); } |
1da177e4c Linux-2.6.12-rc2 |
3699 |
#ifdef CONFIG_MODVERSIONS |
8c8ef42ae module: include o... |
3700 3701 3702 3703 3704 3705 |
/* Generate the signature for all relevant module structures here. * If these change, we don't want to try to parse the module. */ void module_layout(struct module *mod, struct modversion_info *ver, struct kernel_param *kp, struct kernel_symbol *ks, |
654986462 tracepoints: Fix ... |
3706 |
struct tracepoint * const *tp) |
8c8ef42ae module: include o... |
3707 3708 3709 |
{ } EXPORT_SYMBOL(module_layout); |
1da177e4c Linux-2.6.12-rc2 |
3710 |
#endif |