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kernel/module.c
96.6 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 <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 = { |
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.flags = KERNEL_PARAM_OPS_FL_NOARG, |
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.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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/* 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) { |
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pr_warn("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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|
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#ifdef CONFIG_UNUSED_SYMBOLS |
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if (syms->unused && fsa->warn) { |
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pr_warn("Symbol %s is marked as UNUSED, however this module is " "using it. ", fsa->name); pr_warn("This symbol will go away in the future. "); pr_warn("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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} |
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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 |
75676500f module: make lock... |
410 |
* (optional) module which owns it. Needs preempt disabled or module_mutex. */ |
c6b378019 module: Export sy... |
411 412 413 414 415 |
const struct kernel_symbol *find_symbol(const char *name, struct module **owner, const unsigned long **crc, bool gplok, bool warn) |
dafd0940c module: generic e... |
416 417 418 419 420 421 |
{ struct find_symbol_arg fsa; fsa.name = name; fsa.gplok = gplok; fsa.warn = warn; |
de4d8d534 module: each_symb... |
422 |
if (each_symbol_section(find_symbol_in_section, &fsa)) { |
dafd0940c module: generic e... |
423 424 425 426 |
if (owner) *owner = fsa.owner; if (crc) *crc = fsa.crc; |
414fd31b2 module: Make find... |
427 |
return fsa.sym; |
dafd0940c module: generic e... |
428 |
} |
5e1241692 module: replace D... |
429 430 |
pr_debug("Failed to find symbol %s ", name); |
414fd31b2 module: Make find... |
431 |
return NULL; |
1da177e4c Linux-2.6.12-rc2 |
432 |
} |
c6b378019 module: Export sy... |
433 |
EXPORT_SYMBOL_GPL(find_symbol); |
1da177e4c Linux-2.6.12-rc2 |
434 |
|
1da177e4c Linux-2.6.12-rc2 |
435 |
/* Search for module by name: must hold module_mutex. */ |
4f6de4d51 module: don't mod... |
436 |
static struct module *find_module_all(const char *name, size_t len, |
0d21b0e34 module: add new s... |
437 |
bool even_unformed) |
1da177e4c Linux-2.6.12-rc2 |
438 439 440 441 |
{ struct module *mod; list_for_each_entry(mod, &modules, list) { |
0d21b0e34 module: add new s... |
442 443 |
if (!even_unformed && mod->state == MODULE_STATE_UNFORMED) continue; |
4f6de4d51 module: don't mod... |
444 |
if (strlen(mod->name) == len && !memcmp(mod->name, name, len)) |
1da177e4c Linux-2.6.12-rc2 |
445 446 447 448 |
return mod; } return NULL; } |
0d21b0e34 module: add new s... |
449 450 451 |
struct module *find_module(const char *name) { |
4f6de4d51 module: don't mod... |
452 |
return find_module_all(name, strlen(name), false); |
0d21b0e34 module: add new s... |
453 |
} |
c6b378019 module: Export sy... |
454 |
EXPORT_SYMBOL_GPL(find_module); |
1da177e4c Linux-2.6.12-rc2 |
455 456 |
#ifdef CONFIG_SMP |
fbf59bc9d percpu: implement... |
457 |
|
259354dea module: encapsula... |
458 |
static inline void __percpu *mod_percpu(struct module *mod) |
fbf59bc9d percpu: implement... |
459 |
{ |
259354dea module: encapsula... |
460 461 |
return mod->percpu; } |
fbf59bc9d percpu: implement... |
462 |
|
9eb76d779 module: cleanup c... |
463 |
static int percpu_modalloc(struct module *mod, struct load_info *info) |
259354dea module: encapsula... |
464 |
{ |
9eb76d779 module: cleanup c... |
465 466 467 468 469 |
Elf_Shdr *pcpusec = &info->sechdrs[info->index.pcpu]; unsigned long align = pcpusec->sh_addralign; if (!pcpusec->sh_size) return 0; |
fbf59bc9d percpu: implement... |
470 |
if (align > PAGE_SIZE) { |
bddb12b32 kernel/module.c: ... |
471 472 473 |
pr_warn("%s: per-cpu alignment %li > %li ", mod->name, align, PAGE_SIZE); |
fbf59bc9d percpu: implement... |
474 475 |
align = PAGE_SIZE; } |
9eb76d779 module: cleanup c... |
476 |
mod->percpu = __alloc_reserved_percpu(pcpusec->sh_size, align); |
259354dea module: encapsula... |
477 |
if (!mod->percpu) { |
bddb12b32 kernel/module.c: ... |
478 479 480 |
pr_warn("%s: Could not allocate %lu bytes percpu data ", mod->name, (unsigned long)pcpusec->sh_size); |
259354dea module: encapsula... |
481 482 |
return -ENOMEM; } |
9eb76d779 module: cleanup c... |
483 |
mod->percpu_size = pcpusec->sh_size; |
259354dea module: encapsula... |
484 |
return 0; |
fbf59bc9d percpu: implement... |
485 |
} |
259354dea module: encapsula... |
486 |
static void percpu_modfree(struct module *mod) |
fbf59bc9d percpu: implement... |
487 |
{ |
259354dea module: encapsula... |
488 |
free_percpu(mod->percpu); |
fbf59bc9d percpu: implement... |
489 |
} |
49668688d module: pass load... |
490 |
static unsigned int find_pcpusec(struct load_info *info) |
6b588c18f module: reorder m... |
491 |
{ |
49668688d module: pass load... |
492 |
return find_sec(info, ".data..percpu"); |
6b588c18f module: reorder m... |
493 |
} |
259354dea module: encapsula... |
494 495 |
static void percpu_modcopy(struct module *mod, const void *from, unsigned long size) |
6b588c18f module: reorder m... |
496 497 498 499 |
{ int cpu; for_each_possible_cpu(cpu) |
259354dea module: encapsula... |
500 |
memcpy(per_cpu_ptr(mod->percpu, cpu), from, size); |
6b588c18f module: reorder m... |
501 |
} |
10fad5e46 percpu, module: i... |
502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 |
/** * 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... |
519 520 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
10fad5e46 percpu, module: i... |
521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 |
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... |
536 |
} |
1da177e4c Linux-2.6.12-rc2 |
537 |
#else /* ... !CONFIG_SMP */ |
6b588c18f module: reorder m... |
538 |
|
259354dea module: encapsula... |
539 |
static inline void __percpu *mod_percpu(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
540 541 542 |
{ return NULL; } |
9eb76d779 module: cleanup c... |
543 |
static int percpu_modalloc(struct module *mod, struct load_info *info) |
259354dea module: encapsula... |
544 |
{ |
9eb76d779 module: cleanup c... |
545 546 547 548 |
/* UP modules shouldn't have this section: ENOMEM isn't quite right */ if (info->sechdrs[info->index.pcpu].sh_size != 0) return -ENOMEM; return 0; |
259354dea module: encapsula... |
549 550 |
} static inline void percpu_modfree(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
551 |
{ |
1da177e4c Linux-2.6.12-rc2 |
552 |
} |
49668688d module: pass load... |
553 |
static unsigned int find_pcpusec(struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
554 555 556 |
{ return 0; } |
259354dea module: encapsula... |
557 558 |
static inline void percpu_modcopy(struct module *mod, const void *from, unsigned long size) |
1da177e4c Linux-2.6.12-rc2 |
559 560 561 562 |
{ /* pcpusec should be 0, and size of that section should be 0. */ BUG_ON(size != 0); } |
10fad5e46 percpu, module: i... |
563 564 565 566 |
bool is_module_percpu_address(unsigned long addr) { return false; } |
6b588c18f module: reorder m... |
567 |
|
1da177e4c Linux-2.6.12-rc2 |
568 |
#endif /* CONFIG_SMP */ |
c988d2b28 [PATCH] modules: ... |
569 570 571 572 573 574 |
#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... |
575 |
struct module_kobject *mk, char *buffer) \ |
c988d2b28 [PATCH] modules: ... |
576 |
{ \ |
cc56ded3f kernel/module.c: ... |
577 578 |
return scnprintf(buffer, PAGE_SIZE, "%s ", mk->mod->field); \ |
c988d2b28 [PATCH] modules: ... |
579 580 581 582 583 584 585 |
} \ static int modinfo_##field##_exists(struct module *mod) \ { \ return mod->field != NULL; \ } \ static void free_modinfo_##field(struct module *mod) \ { \ |
22a8bdeb5 whitespace fixes:... |
586 587 |
kfree(mod->field); \ mod->field = NULL; \ |
c988d2b28 [PATCH] modules: ... |
588 589 |
} \ static struct module_attribute modinfo_##field = { \ |
7b595756e sysfs: kill unnec... |
590 |
.attr = { .name = __stringify(field), .mode = 0444 }, \ |
c988d2b28 [PATCH] modules: ... |
591 592 593 594 595 596 597 598 |
.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 ... |
599 |
static char last_unloaded_module[MODULE_NAME_LEN+1]; |
03e88ae1b [PATCH] fix modul... |
600 |
#ifdef CONFIG_MODULE_UNLOAD |
eb0c53771 tracing: Fix comp... |
601 602 |
EXPORT_TRACEPOINT_SYMBOL(module_get); |
1da177e4c Linux-2.6.12-rc2 |
603 |
/* Init the unload section of the module. */ |
9f85a4bbb module: refactor ... |
604 |
static int module_unload_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
605 |
{ |
9f85a4bbb module: refactor ... |
606 607 608 |
mod->refptr = alloc_percpu(struct module_ref); if (!mod->refptr) return -ENOMEM; |
2c02dfe7f module: Make the ... |
609 610 |
INIT_LIST_HEAD(&mod->source_list); INIT_LIST_HEAD(&mod->target_list); |
e1783a240 module: Use this_... |
611 |
|
1da177e4c Linux-2.6.12-rc2 |
612 |
/* Hold reference count during initialization. */ |
08f141d3d modules: use raw_... |
613 |
raw_cpu_write(mod->refptr->incs, 1); |
9f85a4bbb module: refactor ... |
614 615 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
616 |
} |
1da177e4c Linux-2.6.12-rc2 |
617 618 619 620 |
/* Does a already use b? */ static int already_uses(struct module *a, struct module *b) { struct module_use *use; |
2c02dfe7f module: Make the ... |
621 622 |
list_for_each_entry(use, &b->source_list, source_list) { if (use->source == a) { |
5e1241692 module: replace D... |
623 624 |
pr_debug("%s uses %s! ", a->name, b->name); |
1da177e4c Linux-2.6.12-rc2 |
625 626 627 |
return 1; } } |
5e1241692 module: replace D... |
628 629 |
pr_debug("%s does not use %s! ", a->name, b->name); |
1da177e4c Linux-2.6.12-rc2 |
630 631 |
return 0; } |
2c02dfe7f module: Make the ... |
632 633 634 635 636 637 638 639 640 |
/* * 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 ... |
641 |
struct module_use *use; |
5e1241692 module: replace D... |
642 643 |
pr_debug("Allocating new usage for %s. ", a->name); |
2c02dfe7f module: Make the ... |
644 645 |
use = kmalloc(sizeof(*use), GFP_ATOMIC); if (!use) { |
bddb12b32 kernel/module.c: ... |
646 647 |
pr_warn("%s: out of memory loading ", a->name); |
2c02dfe7f module: Make the ... |
648 649 650 651 652 653 654 |
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 ... |
655 656 |
return 0; } |
75676500f module: make lock... |
657 |
/* Module a uses b: caller needs module_mutex() */ |
9bea7f239 module: fix bne2 ... |
658 |
int ref_module(struct module *a, struct module *b) |
1da177e4c Linux-2.6.12-rc2 |
659 |
{ |
c8e21ced0 module: fix kdb's... |
660 |
int err; |
270a6c4ca /sys/modules/*/ho... |
661 |
|
9bea7f239 module: fix bne2 ... |
662 |
if (b == NULL || already_uses(a, b)) |
218ce7351 Revert "module: d... |
663 |
return 0; |
218ce7351 Revert "module: d... |
664 |
|
9bea7f239 module: fix bne2 ... |
665 666 |
/* If module isn't available, we fail. */ err = strong_try_module_get(b); |
c9a3ba55b module: wait for ... |
667 |
if (err) |
9bea7f239 module: fix bne2 ... |
668 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
669 |
|
2c02dfe7f module: Make the ... |
670 671 |
err = add_module_usage(a, b); if (err) { |
1da177e4c Linux-2.6.12-rc2 |
672 |
module_put(b); |
9bea7f239 module: fix bne2 ... |
673 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
674 |
} |
9bea7f239 module: fix bne2 ... |
675 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
676 |
} |
9bea7f239 module: fix bne2 ... |
677 |
EXPORT_SYMBOL_GPL(ref_module); |
1da177e4c Linux-2.6.12-rc2 |
678 679 680 681 |
/* Clear the unload stuff of the module. */ static void module_unload_free(struct module *mod) { |
2c02dfe7f module: Make the ... |
682 |
struct module_use *use, *tmp; |
1da177e4c Linux-2.6.12-rc2 |
683 |
|
75676500f module: make lock... |
684 |
mutex_lock(&module_mutex); |
2c02dfe7f module: Make the ... |
685 686 |
list_for_each_entry_safe(use, tmp, &mod->target_list, target_list) { struct module *i = use->target; |
5e1241692 module: replace D... |
687 688 |
pr_debug("%s unusing %s ", mod->name, i->name); |
2c02dfe7f module: Make the ... |
689 690 691 692 |
module_put(i); list_del(&use->source_list); list_del(&use->target_list); kfree(use); |
1da177e4c Linux-2.6.12-rc2 |
693 |
} |
75676500f module: make lock... |
694 |
mutex_unlock(&module_mutex); |
9f85a4bbb module: refactor ... |
695 696 |
free_percpu(mod->refptr); |
1da177e4c Linux-2.6.12-rc2 |
697 698 699 |
} #ifdef CONFIG_MODULE_FORCE_UNLOAD |
fb1697933 [PATCH] modules: ... |
700 |
static inline int try_force_unload(unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
701 702 703 |
{ int ret = (flags & O_TRUNC); if (ret) |
373d4d099 taint: add explic... |
704 |
add_taint(TAINT_FORCED_RMMOD, LOCKDEP_NOW_UNRELIABLE); |
1da177e4c Linux-2.6.12-rc2 |
705 706 707 |
return ret; } #else |
fb1697933 [PATCH] modules: ... |
708 |
static inline int try_force_unload(unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 |
{ 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... |
725 726 |
/* If it's not unused, quit unless we're forcing. */ if (module_refcount(sref->mod) != 0) { |
fb1697933 [PATCH] modules: ... |
727 |
if (!(*sref->forced = try_force_unload(sref->flags))) |
1da177e4c Linux-2.6.12-rc2 |
728 729 730 731 732 733 734 735 736 737 |
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) { |
3f2b9c9cd module: remove rm... |
738 |
struct stopref sref = { mod, flags, forced }; |
1da177e4c Linux-2.6.12-rc2 |
739 |
|
3f2b9c9cd module: remove rm... |
740 |
return stop_machine(__try_stop_module, &sref, NULL); |
1da177e4c Linux-2.6.12-rc2 |
741 |
} |
bd77c0477 module: struct mo... |
742 |
unsigned long module_refcount(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
743 |
{ |
bd77c0477 module: struct mo... |
744 |
unsigned long incs = 0, decs = 0; |
720eba31f modules: Use a be... |
745 |
int cpu; |
1da177e4c Linux-2.6.12-rc2 |
746 |
|
720eba31f modules: Use a be... |
747 |
for_each_possible_cpu(cpu) |
5fbfb18d7 Fix up possibly r... |
748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 |
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 |
766 767 768 769 770 |
} EXPORT_SYMBOL(module_refcount); /* This exists whether we can unload or not */ static void free_module(struct module *mod); |
17da2bd90 [CVE-2009-0029] S... |
771 772 |
SYSCALL_DEFINE2(delete_module, const char __user *, name_user, unsigned int, flags) |
1da177e4c Linux-2.6.12-rc2 |
773 774 |
{ struct module *mod; |
dfff0a067 Revert "Driver co... |
775 |
char name[MODULE_NAME_LEN]; |
1da177e4c Linux-2.6.12-rc2 |
776 |
int ret, forced = 0; |
3d43321b7 modules: sysctl t... |
777 |
if (!capable(CAP_SYS_MODULE) || modules_disabled) |
dfff0a067 Revert "Driver co... |
778 779 780 781 782 |
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... |
783 784 |
if (mutex_lock_interruptible(&module_mutex) != 0) return -EINTR; |
1da177e4c Linux-2.6.12-rc2 |
785 786 787 788 789 790 |
mod = find_module(name); if (!mod) { ret = -ENOENT; goto out; } |
2c02dfe7f module: Make the ... |
791 |
if (!list_empty(&mod->source_list)) { |
1da177e4c Linux-2.6.12-rc2 |
792 793 794 795 796 797 798 |
/* 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) { |
3f2b9c9cd module: remove rm... |
799 |
/* FIXME: if (force), slam module count damn the torpedoes */ |
5e1241692 module: replace D... |
800 801 |
pr_debug("%s already dying ", mod->name); |
1da177e4c Linux-2.6.12-rc2 |
802 803 804 805 806 |
ret = -EBUSY; goto out; } /* If it has an init func, it must have an exit func to unload */ |
af49d9248 Remove "unsafe" f... |
807 |
if (mod->init && !mod->exit) { |
fb1697933 [PATCH] modules: ... |
808 |
forced = try_force_unload(flags); |
1da177e4c Linux-2.6.12-rc2 |
809 810 811 812 813 814 |
if (!forced) { /* This module can't be removed */ ret = -EBUSY; goto out; } } |
1da177e4c Linux-2.6.12-rc2 |
815 816 817 818 |
/* Stop the machine so refcounts can't move and disable module. */ ret = try_stop_module(mod, flags, &forced); if (ret != 0) goto out; |
df4b565e1 module: add MODUL... |
819 |
mutex_unlock(&module_mutex); |
25985edce Fix common misspe... |
820 |
/* Final destruction now no one is using it. */ |
df4b565e1 module: add MODUL... |
821 |
if (mod->exit != NULL) |
1da177e4c Linux-2.6.12-rc2 |
822 |
mod->exit(); |
df4b565e1 module: add MODUL... |
823 824 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); |
22a9d6456 async: Asynchrono... |
825 |
async_synchronize_full(); |
75676500f module: make lock... |
826 |
|
e14af7eeb debug: track and ... |
827 |
/* Store the name of the last unloaded module for diagnostic purposes */ |
efa5345e3 module: Fix gratu... |
828 |
strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module)); |
1da177e4c Linux-2.6.12-rc2 |
829 |
|
75676500f module: make lock... |
830 831 832 |
free_module(mod); return 0; out: |
6389a3851 [PATCH] kernel/mo... |
833 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
834 835 |
return ret; } |
d1e99d7ae module: fix warni... |
836 |
static inline void print_unload_info(struct seq_file *m, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
837 838 839 |
{ struct module_use *use; int printed_something = 0; |
bd77c0477 module: struct mo... |
840 |
seq_printf(m, " %lu ", module_refcount(mod)); |
1da177e4c Linux-2.6.12-rc2 |
841 842 843 |
/* Always include a trailing , so userspace can differentiate between this and the old multi-field proc format. */ |
2c02dfe7f module: Make the ... |
844 |
list_for_each_entry(use, &mod->source_list, source_list) { |
1da177e4c Linux-2.6.12-rc2 |
845 |
printed_something = 1; |
2c02dfe7f module: Make the ... |
846 |
seq_printf(m, "%s,", use->source->name); |
1da177e4c Linux-2.6.12-rc2 |
847 |
} |
1da177e4c Linux-2.6.12-rc2 |
848 849 850 851 852 853 854 855 856 857 858 859 |
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 |
860 |
|
24da1cbff modules: remove m... |
861 |
preempt_disable(); |
414fd31b2 module: Make find... |
862 |
if (!find_symbol(symbol, &owner, NULL, true, false)) |
1da177e4c Linux-2.6.12-rc2 |
863 864 |
BUG(); module_put(owner); |
24da1cbff modules: remove m... |
865 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
866 867 |
} EXPORT_SYMBOL(__symbol_put); |
7d1d16e41 module: fix BUG_O... |
868 |
/* Note this assumes addr is a function, which it currently always is. */ |
1da177e4c Linux-2.6.12-rc2 |
869 870 |
void symbol_put_addr(void *addr) { |
5e3766138 [PATCH] symbol_pu... |
871 |
struct module *modaddr; |
7d1d16e41 module: fix BUG_O... |
872 |
unsigned long a = (unsigned long)dereference_function_descriptor(addr); |
1da177e4c Linux-2.6.12-rc2 |
873 |
|
7d1d16e41 module: fix BUG_O... |
874 |
if (core_kernel_text(a)) |
5e3766138 [PATCH] symbol_pu... |
875 |
return; |
1da177e4c Linux-2.6.12-rc2 |
876 |
|
a6e6abd57 module: remove mo... |
877 878 |
/* 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... |
879 |
modaddr = __module_text_address(a); |
a6e6abd57 module: remove mo... |
880 |
BUG_ON(!modaddr); |
5e3766138 [PATCH] symbol_pu... |
881 |
module_put(modaddr); |
1da177e4c Linux-2.6.12-rc2 |
882 883 884 885 |
} EXPORT_SYMBOL_GPL(symbol_put_addr); static ssize_t show_refcnt(struct module_attribute *mattr, |
4befb026c module: change at... |
886 |
struct module_kobject *mk, char *buffer) |
1da177e4c Linux-2.6.12-rc2 |
887 |
{ |
bd77c0477 module: struct mo... |
888 889 |
return sprintf(buffer, "%lu ", module_refcount(mk->mod)); |
1da177e4c Linux-2.6.12-rc2 |
890 |
} |
cca3e7073 modules: sysfs - ... |
891 892 |
static struct module_attribute modinfo_refcnt = __ATTR(refcnt, 0444, show_refcnt, NULL); |
1da177e4c Linux-2.6.12-rc2 |
893 |
|
d53799be6 module: move __mo... |
894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 |
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 ... |
923 924 925 |
void module_put(struct module *module) { if (module) { |
e1783a240 module: Use this_... |
926 |
preempt_disable(); |
5fbfb18d7 Fix up possibly r... |
927 928 |
smp_wmb(); /* see comment in module_refcount */ __this_cpu_inc(module->refptr->decs); |
e1783a240 module: Use this_... |
929 |
|
ae832d1e0 tracing: Remove s... |
930 |
trace_module_put(module, _RET_IP_); |
e1783a240 module: Use this_... |
931 |
preempt_enable(); |
f6a570333 [PATCH] severing ... |
932 933 934 |
} } EXPORT_SYMBOL(module_put); |
1da177e4c Linux-2.6.12-rc2 |
935 |
#else /* !CONFIG_MODULE_UNLOAD */ |
d1e99d7ae module: fix warni... |
936 |
static inline void print_unload_info(struct seq_file *m, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
937 938 939 940 941 942 943 944 |
{ /* 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 ... |
945 |
int ref_module(struct module *a, struct module *b) |
1da177e4c Linux-2.6.12-rc2 |
946 |
{ |
9bea7f239 module: fix bne2 ... |
947 |
return strong_try_module_get(b); |
1da177e4c Linux-2.6.12-rc2 |
948 |
} |
9bea7f239 module: fix bne2 ... |
949 |
EXPORT_SYMBOL_GPL(ref_module); |
1da177e4c Linux-2.6.12-rc2 |
950 |
|
9f85a4bbb module: refactor ... |
951 |
static inline int module_unload_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
952 |
{ |
9f85a4bbb module: refactor ... |
953 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
954 955 |
} #endif /* CONFIG_MODULE_UNLOAD */ |
53999bf34 error: implicit d... |
956 957 958 959 960 961 962 963 964 965 966 967 |
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'; |
66cc69e34 Fix: module signa... |
968 |
if (mod->taints & (1 << TAINT_UNSIGNED_MODULE)) |
57673c2b0 Use 'E' instead o... |
969 |
buf[l++] = 'E'; |
53999bf34 error: implicit d... |
970 971 |
/* * TAINT_FORCED_RMMOD: could be added. |
8c90487cd Rename TAINT_UNSA... |
972 |
* TAINT_CPU_OUT_OF_SPEC, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't |
53999bf34 error: implicit d... |
973 974 975 976 |
* apply to modules. */ return l; } |
1f71740ab Driver core: show... |
977 |
static ssize_t show_initstate(struct module_attribute *mattr, |
4befb026c module: change at... |
978 |
struct module_kobject *mk, char *buffer) |
1f71740ab Driver core: show... |
979 980 |
{ const char *state = "unknown"; |
4befb026c module: change at... |
981 |
switch (mk->mod->state) { |
1f71740ab Driver core: show... |
982 983 984 985 986 987 988 989 990 |
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... |
991 992 |
default: BUG(); |
1f71740ab Driver core: show... |
993 994 995 996 |
} return sprintf(buffer, "%s ", state); } |
cca3e7073 modules: sysfs - ... |
997 998 |
static struct module_attribute modinfo_initstate = __ATTR(initstate, 0444, show_initstate, NULL); |
1f71740ab Driver core: show... |
999 |
|
88bfa3247 module: add /sys/... |
1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 |
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 - ... |
1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 |
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/... |
1046 |
|
03e88ae1b [PATCH] fix modul... |
1047 |
static struct module_attribute *modinfo_attrs[] = { |
cca3e7073 modules: sysfs - ... |
1048 |
&module_uevent, |
03e88ae1b [PATCH] fix modul... |
1049 1050 |
&modinfo_version, &modinfo_srcversion, |
cca3e7073 modules: sysfs - ... |
1051 1052 1053 1054 |
&modinfo_initstate, &modinfo_coresize, &modinfo_initsize, &modinfo_taint, |
03e88ae1b [PATCH] fix modul... |
1055 |
#ifdef CONFIG_MODULE_UNLOAD |
cca3e7073 modules: sysfs - ... |
1056 |
&modinfo_refcnt, |
03e88ae1b [PATCH] fix modul... |
1057 1058 1059 |
#endif NULL, }; |
1da177e4c Linux-2.6.12-rc2 |
1060 |
static const char vermagic[] = VERMAGIC_STRING; |
c6e665c8f module: clarify t... |
1061 |
static int try_to_force_load(struct module *mod, const char *reason) |
826e4506a Make forced modul... |
1062 1063 |
{ #ifdef CONFIG_MODULE_FORCE_LOAD |
25ddbb18a Make the taint fl... |
1064 |
if (!test_taint(TAINT_FORCED_MODULE)) |
bddb12b32 kernel/module.c: ... |
1065 1066 |
pr_warn("%s: %s: kernel tainted. ", mod->name, reason); |
373d4d099 taint: add explic... |
1067 |
add_taint_module(mod, TAINT_FORCED_MODULE, LOCKDEP_NOW_UNRELIABLE); |
826e4506a Make forced modul... |
1068 1069 1070 1071 1072 |
return 0; #else return -ENOEXEC; #endif } |
1da177e4c Linux-2.6.12-rc2 |
1073 |
#ifdef CONFIG_MODVERSIONS |
d4703aefd module: handle pp... |
1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 |
/* 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 |
1084 1085 1086 1087 |
static int check_version(Elf_Shdr *sechdrs, unsigned int versindex, const char *symname, struct module *mod, |
d4703aefd module: handle pp... |
1088 1089 |
const unsigned long *crc, const struct module *crc_owner) |
1da177e4c Linux-2.6.12-rc2 |
1090 1091 1092 1093 1094 1095 1096 |
{ 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... |
1097 1098 1099 |
/* 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 |
1100 1101 1102 1103 1104 1105 1106 |
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... |
1107 |
if (versions[i].crc == maybe_relocated(*crc, crc_owner)) |
1da177e4c Linux-2.6.12-rc2 |
1108 |
return 1; |
5e1241692 module: replace D... |
1109 1110 |
pr_debug("Found checksum %lX vs module %lX ", |
d4703aefd module: handle pp... |
1111 |
maybe_relocated(*crc, crc_owner), versions[i].crc); |
826e4506a Make forced modul... |
1112 |
goto bad_version; |
1da177e4c Linux-2.6.12-rc2 |
1113 |
} |
826e4506a Make forced modul... |
1114 |
|
bddb12b32 kernel/module.c: ... |
1115 1116 |
pr_warn("%s: no symbol version for %s ", mod->name, symname); |
a5dd69707 module: be more p... |
1117 |
return 0; |
826e4506a Make forced modul... |
1118 1119 1120 1121 1122 1123 |
bad_version: printk("%s: disagrees about version of symbol %s ", mod->name, symname); return 0; |
1da177e4c Linux-2.6.12-rc2 |
1124 1125 1126 1127 1128 1129 1130 |
} 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 |
1131 |
|
75676500f module: make lock... |
1132 1133 |
/* Since this should be found in kernel (which can't be removed), * no locking is necessary. */ |
b92021b09 CONFIG_SYMBOL_PRE... |
1134 |
if (!find_symbol(VMLINUX_SYMBOL_STR(module_layout), NULL, |
6560dc160 module: use MODUL... |
1135 |
&crc, true, false)) |
1da177e4c Linux-2.6.12-rc2 |
1136 |
BUG(); |
a4b6a77b7 module: fix symbo... |
1137 1138 |
return check_version(sechdrs, versindex, VMLINUX_SYMBOL_STR(module_layout), mod, crc, |
d4703aefd module: handle pp... |
1139 |
NULL); |
1da177e4c Linux-2.6.12-rc2 |
1140 |
} |
91e37a793 module: don't ign... |
1141 1142 1143 |
/* 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 |
1144 |
{ |
91e37a793 module: don't ign... |
1145 1146 1147 1148 |
if (has_crcs) { amagic += strcspn(amagic, " "); bmagic += strcspn(bmagic, " "); } |
1da177e4c Linux-2.6.12-rc2 |
1149 1150 1151 1152 1153 1154 1155 |
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... |
1156 1157 |
const unsigned long *crc, const struct module *crc_owner) |
1da177e4c Linux-2.6.12-rc2 |
1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 |
{ return 1; } static inline int check_modstruct_version(Elf_Shdr *sechdrs, unsigned int versindex, struct module *mod) { return 1; } |
91e37a793 module: don't ign... |
1168 1169 |
static inline int same_magic(const char *amagic, const char *bmagic, bool has_crcs) |
1da177e4c Linux-2.6.12-rc2 |
1170 1171 1172 1173 |
{ return strcmp(amagic, bmagic) == 0; } #endif /* CONFIG_MODVERSIONS */ |
75676500f module: make lock... |
1174 |
/* Resolve a symbol for this module. I.e. if we find one, record usage. */ |
49668688d module: pass load... |
1175 1176 |
static const struct kernel_symbol *resolve_symbol(struct module *mod, const struct load_info *info, |
414fd31b2 module: Make find... |
1177 |
const char *name, |
9bea7f239 module: fix bne2 ... |
1178 |
char ownername[]) |
1da177e4c Linux-2.6.12-rc2 |
1179 1180 |
{ struct module *owner; |
414fd31b2 module: Make find... |
1181 |
const struct kernel_symbol *sym; |
1da177e4c Linux-2.6.12-rc2 |
1182 |
const unsigned long *crc; |
9bea7f239 module: fix bne2 ... |
1183 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
1184 |
|
75676500f module: make lock... |
1185 |
mutex_lock(&module_mutex); |
414fd31b2 module: Make find... |
1186 |
sym = find_symbol(name, &owner, &crc, |
25ddbb18a Make the taint fl... |
1187 |
!(mod->taints & (1 << TAINT_PROPRIETARY_MODULE)), true); |
9bea7f239 module: fix bne2 ... |
1188 1189 |
if (!sym) goto unlock; |
49668688d module: pass load... |
1190 1191 |
if (!check_version(info->sechdrs, info->index.vers, name, mod, crc, owner)) { |
9bea7f239 module: fix bne2 ... |
1192 1193 |
sym = ERR_PTR(-EINVAL); goto getname; |
1da177e4c Linux-2.6.12-rc2 |
1194 |
} |
9bea7f239 module: fix bne2 ... |
1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 |
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... |
1206 |
mutex_unlock(&module_mutex); |
218ce7351 Revert "module: d... |
1207 |
return sym; |
1da177e4c Linux-2.6.12-rc2 |
1208 |
} |
49668688d module: pass load... |
1209 1210 1211 1212 |
static const struct kernel_symbol * resolve_symbol_wait(struct module *mod, const struct load_info *info, const char *name) |
9bea7f239 module: fix bne2 ... |
1213 1214 |
{ const struct kernel_symbol *ksym; |
49668688d module: pass load... |
1215 |
char owner[MODULE_NAME_LEN]; |
9bea7f239 module: fix bne2 ... |
1216 1217 |
if (wait_event_interruptible_timeout(module_wq, |
49668688d module: pass load... |
1218 1219 |
!IS_ERR(ksym = resolve_symbol(mod, info, name, owner)) || PTR_ERR(ksym) != -EBUSY, |
9bea7f239 module: fix bne2 ... |
1220 |
30 * HZ) <= 0) { |
bddb12b32 kernel/module.c: ... |
1221 1222 1223 |
pr_warn("%s: gave up waiting for init of module %s. ", mod->name, owner); |
9bea7f239 module: fix bne2 ... |
1224 1225 1226 |
} return ksym; } |
1da177e4c Linux-2.6.12-rc2 |
1227 1228 1229 1230 |
/* * /sys/module/foo/sections stuff * J. Corbet <corbet@lwn.net> */ |
8f6d03781 module: sysfs cle... |
1231 |
#ifdef CONFIG_SYSFS |
10b465aaf modules: Skip emp... |
1232 |
|
8f6d03781 module: sysfs cle... |
1233 |
#ifdef CONFIG_KALLSYMS |
10b465aaf modules: Skip emp... |
1234 1235 1236 1237 |
static inline bool sect_empty(const Elf_Shdr *sect) { return !(sect->sh_flags & SHF_ALLOC) || sect->sh_size == 0; } |
a58730c42 module: make modu... |
1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 |
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 |
1251 |
static ssize_t module_sect_show(struct module_attribute *mattr, |
4befb026c module: change at... |
1252 |
struct module_kobject *mk, char *buf) |
1da177e4c Linux-2.6.12-rc2 |
1253 1254 1255 |
{ struct module_sect_attr *sattr = container_of(mattr, struct module_sect_attr, mattr); |
9f36e2c44 printk: use %pK f... |
1256 1257 |
return sprintf(buf, "0x%pK ", (void *)sattr->address); |
1da177e4c Linux-2.6.12-rc2 |
1258 |
} |
04b1db9fd [PATCH] /sys/modu... |
1259 1260 |
static void free_sect_attrs(struct module_sect_attrs *sect_attrs) { |
a58730c42 module: make modu... |
1261 |
unsigned int section; |
04b1db9fd [PATCH] /sys/modu... |
1262 1263 1264 1265 1266 |
for (section = 0; section < sect_attrs->nsections; section++) kfree(sect_attrs->attrs[section].name); kfree(sect_attrs); } |
8f6d03781 module: sysfs cle... |
1267 |
static void add_sect_attrs(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1268 1269 1270 1271 1272 |
{ unsigned int nloaded = 0, i, size[2]; struct module_sect_attrs *sect_attrs; struct module_sect_attr *sattr; struct attribute **gattr; |
22a8bdeb5 whitespace fixes:... |
1273 |
|
1da177e4c Linux-2.6.12-rc2 |
1274 |
/* Count loaded sections and allocate structures */ |
8f6d03781 module: sysfs cle... |
1275 1276 |
for (i = 0; i < info->hdr->e_shnum; i++) if (!sect_empty(&info->sechdrs[i])) |
1da177e4c Linux-2.6.12-rc2 |
1277 1278 1279 1280 1281 |
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... |
1282 1283 |
sect_attrs = kzalloc(size[0] + size[1], GFP_KERNEL); if (sect_attrs == NULL) |
1da177e4c Linux-2.6.12-rc2 |
1284 1285 1286 1287 1288 |
return; /* Setup section attributes. */ sect_attrs->grp.name = "sections"; sect_attrs->grp.attrs = (void *)sect_attrs + size[0]; |
04b1db9fd [PATCH] /sys/modu... |
1289 |
sect_attrs->nsections = 0; |
1da177e4c Linux-2.6.12-rc2 |
1290 1291 |
sattr = §_attrs->attrs[0]; gattr = §_attrs->grp.attrs[0]; |
8f6d03781 module: sysfs cle... |
1292 1293 1294 |
for (i = 0; i < info->hdr->e_shnum; i++) { Elf_Shdr *sec = &info->sechdrs[i]; if (sect_empty(sec)) |
35dead423 modules: don't ex... |
1295 |
continue; |
8f6d03781 module: sysfs cle... |
1296 1297 |
sattr->address = sec->sh_addr; sattr->name = kstrdup(info->secstrings + sec->sh_name, |
04b1db9fd [PATCH] /sys/modu... |
1298 1299 1300 1301 |
GFP_KERNEL); if (sattr->name == NULL) goto out; sect_attrs->nsections++; |
361795b1e sysfs: Use sysfs_... |
1302 |
sysfs_attr_init(&sattr->mattr.attr); |
1da177e4c Linux-2.6.12-rc2 |
1303 1304 1305 |
sattr->mattr.show = module_sect_show; sattr->mattr.store = NULL; sattr->mattr.attr.name = sattr->name; |
1da177e4c Linux-2.6.12-rc2 |
1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 |
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... |
1317 |
free_sect_attrs(sect_attrs); |
1da177e4c Linux-2.6.12-rc2 |
1318 1319 1320 1321 1322 1323 1324 1325 1326 |
} 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... |
1327 |
free_sect_attrs(mod->sect_attrs); |
1da177e4c Linux-2.6.12-rc2 |
1328 1329 1330 |
mod->sect_attrs = NULL; } } |
6d7601338 Add /sys/module/n... |
1331 1332 1333 1334 1335 1336 1337 1338 1339 |
/* * /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... |
1340 |
static ssize_t module_notes_read(struct file *filp, struct kobject *kobj, |
6d7601338 Add /sys/module/n... |
1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 |
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... |
1358 |
kobject_put(notes_attrs->dir); |
6d7601338 Add /sys/module/n... |
1359 1360 1361 |
} kfree(notes_attrs); } |
8f6d03781 module: sysfs cle... |
1362 |
static void add_notes_attrs(struct module *mod, const struct load_info *info) |
6d7601338 Add /sys/module/n... |
1363 1364 1365 1366 |
{ unsigned int notes, loaded, i; struct module_notes_attrs *notes_attrs; struct bin_attribute *nattr; |
ea6bff368 modules: Fix buil... |
1367 1368 1369 |
/* failed to create section attributes, so can't create notes */ if (!mod->sect_attrs) return; |
6d7601338 Add /sys/module/n... |
1370 1371 |
/* Count notes sections and allocate structures. */ notes = 0; |
8f6d03781 module: sysfs cle... |
1372 1373 1374 |
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... |
1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 |
++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... |
1388 1389 |
for (loaded = i = 0; i < info->hdr->e_shnum; ++i) { if (sect_empty(&info->sechdrs[i])) |
6d7601338 Add /sys/module/n... |
1390 |
continue; |
8f6d03781 module: sysfs cle... |
1391 |
if (info->sechdrs[i].sh_type == SHT_NOTE) { |
361795b1e sysfs: Use sysfs_... |
1392 |
sysfs_bin_attr_init(nattr); |
6d7601338 Add /sys/module/n... |
1393 1394 |
nattr->attr.name = mod->sect_attrs->attrs[loaded].name; nattr->attr.mode = S_IRUGO; |
8f6d03781 module: sysfs cle... |
1395 1396 |
nattr->size = info->sechdrs[i].sh_size; nattr->private = (void *) info->sechdrs[i].sh_addr; |
6d7601338 Add /sys/module/n... |
1397 1398 1399 1400 1401 |
nattr->read = module_notes_read; ++nattr; } ++loaded; } |
4ff6abff8 kobject: get rid ... |
1402 |
notes_attrs->dir = kobject_create_and_add("notes", &mod->mkobj.kobj); |
6d7601338 Add /sys/module/n... |
1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 |
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 |
1423 |
#else |
04b1db9fd [PATCH] /sys/modu... |
1424 |
|
8f6d03781 module: sysfs cle... |
1425 1426 |
static inline void add_sect_attrs(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1427 1428 1429 1430 1431 1432 |
{ } static inline void remove_sect_attrs(struct module *mod) { } |
6d7601338 Add /sys/module/n... |
1433 |
|
8f6d03781 module: sysfs cle... |
1434 1435 |
static inline void add_notes_attrs(struct module *mod, const struct load_info *info) |
6d7601338 Add /sys/module/n... |
1436 1437 1438 1439 1440 1441 |
{ } static inline void remove_notes_attrs(struct module *mod) { } |
8f6d03781 module: sysfs cle... |
1442 |
#endif /* CONFIG_KALLSYMS */ |
1da177e4c Linux-2.6.12-rc2 |
1443 |
|
80a3d1bb4 module: move sysf... |
1444 1445 1446 1447 1448 |
static void add_usage_links(struct module *mod) { #ifdef CONFIG_MODULE_UNLOAD struct module_use *use; int nowarn; |
75676500f module: make lock... |
1449 |
mutex_lock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1450 1451 1452 1453 |
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... |
1454 |
mutex_unlock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1455 1456 1457 1458 1459 1460 1461 |
#endif } static void del_usage_links(struct module *mod) { #ifdef CONFIG_MODULE_UNLOAD struct module_use *use; |
75676500f module: make lock... |
1462 |
mutex_lock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1463 1464 |
list_for_each_entry(use, &mod->target_list, target_list) sysfs_remove_link(use->target->holders_dir, mod->name); |
75676500f module: make lock... |
1465 |
mutex_unlock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1466 1467 |
#endif } |
6407ebb27 module: Make modu... |
1468 |
static int module_add_modinfo_attrs(struct module *mod) |
c988d2b28 [PATCH] modules: ... |
1469 1470 |
{ struct module_attribute *attr; |
03e88ae1b [PATCH] fix modul... |
1471 |
struct module_attribute *temp_attr; |
c988d2b28 [PATCH] modules: ... |
1472 1473 |
int error = 0; int i; |
03e88ae1b [PATCH] fix modul... |
1474 1475 1476 1477 1478 1479 1480 |
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: ... |
1481 1482 |
for (i = 0; (attr = modinfo_attrs[i]) && !error; i++) { if (!attr->test || |
03e88ae1b [PATCH] fix modul... |
1483 1484 |
(attr->test && attr->test(mod))) { memcpy(temp_attr, attr, sizeof(*temp_attr)); |
361795b1e sysfs: Use sysfs_... |
1485 |
sysfs_attr_init(&temp_attr->attr); |
03e88ae1b [PATCH] fix modul... |
1486 1487 1488 |
error = sysfs_create_file(&mod->mkobj.kobj,&temp_attr->attr); ++temp_attr; } |
c988d2b28 [PATCH] modules: ... |
1489 1490 1491 |
} return error; } |
6407ebb27 module: Make modu... |
1492 |
static void module_remove_modinfo_attrs(struct module *mod) |
c988d2b28 [PATCH] modules: ... |
1493 1494 1495 |
{ struct module_attribute *attr; int i; |
03e88ae1b [PATCH] fix modul... |
1496 1497 1498 1499 |
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: ... |
1500 |
sysfs_remove_file(&mod->mkobj.kobj,&attr->attr); |
03e88ae1b [PATCH] fix modul... |
1501 1502 |
if (attr->free) attr->free(mod); |
c988d2b28 [PATCH] modules: ... |
1503 |
} |
03e88ae1b [PATCH] fix modul... |
1504 |
kfree(mod->modinfo_attrs); |
c988d2b28 [PATCH] modules: ... |
1505 |
} |
1da177e4c Linux-2.6.12-rc2 |
1506 |
|
942e44312 module: Fix mod->... |
1507 1508 1509 1510 1511 1512 1513 |
static void mod_kobject_put(struct module *mod) { DECLARE_COMPLETION_ONSTACK(c); mod->mkobj.kobj_completion = &c; kobject_put(&mod->mkobj.kobj); wait_for_completion(&c); } |
6407ebb27 module: Make modu... |
1514 |
static int mod_sysfs_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1515 1516 |
{ int err; |
6494a93d5 Module: check to ... |
1517 |
struct kobject *kobj; |
1da177e4c Linux-2.6.12-rc2 |
1518 |
|
823bccfc4 remove "struct su... |
1519 |
if (!module_sysfs_initialized) { |
bddb12b32 kernel/module.c: ... |
1520 1521 |
pr_err("%s: module sysfs not initialized ", mod->name); |
1cc5f7142 [PATCH] load_modu... |
1522 1523 1524 |
err = -EINVAL; goto out; } |
6494a93d5 Module: check to ... |
1525 1526 1527 |
kobj = kset_find_obj(module_kset, mod->name); if (kobj) { |
bddb12b32 kernel/module.c: ... |
1528 1529 |
pr_err("%s: module is already loaded ", mod->name); |
6494a93d5 Module: check to ... |
1530 1531 1532 1533 |
kobject_put(kobj); err = -EINVAL; goto out; } |
1da177e4c Linux-2.6.12-rc2 |
1534 |
mod->mkobj.mod = mod; |
e17e0f51a Driver core: show... |
1535 |
|
ac3c8141f Kobject: convert ... |
1536 1537 1538 1539 1540 |
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) |
942e44312 module: Fix mod->... |
1541 |
mod_kobject_put(mod); |
270a6c4ca /sys/modules/*/ho... |
1542 |
|
97c146ef0 sysfs: fix /sys/m... |
1543 |
/* delay uevent until full sysfs population */ |
270a6c4ca /sys/modules/*/ho... |
1544 1545 1546 |
out: return err; } |
6407ebb27 module: Make modu... |
1547 |
static int mod_sysfs_setup(struct module *mod, |
8f6d03781 module: sysfs cle... |
1548 |
const struct load_info *info, |
270a6c4ca /sys/modules/*/ho... |
1549 1550 1551 1552 |
struct kernel_param *kparam, unsigned int num_params) { int err; |
80a3d1bb4 module: move sysf... |
1553 1554 1555 |
err = mod_sysfs_init(mod); if (err) goto out; |
4ff6abff8 kobject: get rid ... |
1556 |
mod->holders_dir = kobject_create_and_add("holders", &mod->mkobj.kobj); |
240936e18 mod_sysfs_setup()... |
1557 1558 |
if (!mod->holders_dir) { err = -ENOMEM; |
270a6c4ca /sys/modules/*/ho... |
1559 |
goto out_unreg; |
240936e18 mod_sysfs_setup()... |
1560 |
} |
270a6c4ca /sys/modules/*/ho... |
1561 |
|
1da177e4c Linux-2.6.12-rc2 |
1562 1563 |
err = module_param_sysfs_setup(mod, kparam, num_params); if (err) |
270a6c4ca /sys/modules/*/ho... |
1564 |
goto out_unreg_holders; |
1da177e4c Linux-2.6.12-rc2 |
1565 |
|
c988d2b28 [PATCH] modules: ... |
1566 1567 |
err = module_add_modinfo_attrs(mod); if (err) |
e17e0f51a Driver core: show... |
1568 |
goto out_unreg_param; |
c988d2b28 [PATCH] modules: ... |
1569 |
|
80a3d1bb4 module: move sysf... |
1570 |
add_usage_links(mod); |
8f6d03781 module: sysfs cle... |
1571 1572 |
add_sect_attrs(mod, info); add_notes_attrs(mod, info); |
80a3d1bb4 module: move sysf... |
1573 |
|
e17e0f51a Driver core: show... |
1574 |
kobject_uevent(&mod->mkobj.kobj, KOBJ_ADD); |
1da177e4c Linux-2.6.12-rc2 |
1575 |
return 0; |
e17e0f51a Driver core: show... |
1576 1577 |
out_unreg_param: module_param_sysfs_remove(mod); |
270a6c4ca /sys/modules/*/ho... |
1578 |
out_unreg_holders: |
78a2d906b Kobject: convert ... |
1579 |
kobject_put(mod->holders_dir); |
270a6c4ca /sys/modules/*/ho... |
1580 |
out_unreg: |
942e44312 module: Fix mod->... |
1581 |
mod_kobject_put(mod); |
80a3d1bb4 module: move sysf... |
1582 |
out: |
1da177e4c Linux-2.6.12-rc2 |
1583 1584 |
return err; } |
34e4e2fef modules: proper c... |
1585 1586 1587 |
static void mod_sysfs_fini(struct module *mod) { |
8f6d03781 module: sysfs cle... |
1588 1589 |
remove_notes_attrs(mod); remove_sect_attrs(mod); |
942e44312 module: Fix mod->... |
1590 |
mod_kobject_put(mod); |
34e4e2fef modules: proper c... |
1591 |
} |
8f6d03781 module: sysfs cle... |
1592 |
#else /* !CONFIG_SYSFS */ |
34e4e2fef modules: proper c... |
1593 |
|
8f6d03781 module: sysfs cle... |
1594 1595 |
static int mod_sysfs_setup(struct module *mod, const struct load_info *info, |
6407ebb27 module: Make modu... |
1596 1597 1598 1599 1600 |
struct kernel_param *kparam, unsigned int num_params) { return 0; } |
34e4e2fef modules: proper c... |
1601 1602 1603 |
static void mod_sysfs_fini(struct module *mod) { } |
36b0360d1 module: fix sysfs... |
1604 1605 1606 |
static void module_remove_modinfo_attrs(struct module *mod) { } |
80a3d1bb4 module: move sysf... |
1607 1608 1609 |
static void del_usage_links(struct module *mod) { } |
34e4e2fef modules: proper c... |
1610 |
#endif /* CONFIG_SYSFS */ |
1da177e4c Linux-2.6.12-rc2 |
1611 |
|
36b0360d1 module: fix sysfs... |
1612 |
static void mod_sysfs_teardown(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1613 |
{ |
80a3d1bb4 module: move sysf... |
1614 |
del_usage_links(mod); |
c988d2b28 [PATCH] modules: ... |
1615 |
module_remove_modinfo_attrs(mod); |
1da177e4c Linux-2.6.12-rc2 |
1616 |
module_param_sysfs_remove(mod); |
78a2d906b Kobject: convert ... |
1617 1618 |
kobject_put(mod->mkobj.drivers_dir); kobject_put(mod->holders_dir); |
34e4e2fef modules: proper c... |
1619 |
mod_sysfs_fini(mod); |
1da177e4c Linux-2.6.12-rc2 |
1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 |
} /* * 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... |
1630 |
module_bug_cleanup(mod); |
1da177e4c Linux-2.6.12-rc2 |
1631 1632 |
return 0; } |
84e1c6bb3 x86: Add RO/NX pr... |
1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 |
#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... |
1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 |
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... |
1694 1695 1696 |
} /* Iterate through all modules and set each module's text as RW */ |
5d05c7084 minor ANSI protot... |
1697 |
void set_all_modules_text_rw(void) |
84e1c6bb3 x86: Add RO/NX pr... |
1698 1699 1700 1701 1702 |
{ struct module *mod; mutex_lock(&module_mutex); list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
1703 1704 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
84e1c6bb3 x86: Add RO/NX pr... |
1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 |
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... |
1720 |
void set_all_modules_text_ro(void) |
84e1c6bb3 x86: Add RO/NX pr... |
1721 1722 1723 1724 1725 |
{ struct module *mod; mutex_lock(&module_mutex); list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
1726 1727 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
84e1c6bb3 x86: Add RO/NX pr... |
1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 |
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... |
1743 1744 |
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... |
1745 |
#endif |
74e08fcf7 modules: add defa... |
1746 1747 1748 1749 1750 1751 1752 1753 |
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... |
1754 |
/* Free a module, remove from lists, etc. */ |
1da177e4c Linux-2.6.12-rc2 |
1755 1756 |
static void free_module(struct module *mod) { |
7ead8b831 tracing/events: A... |
1757 |
trace_module_free(mod); |
36b0360d1 module: fix sysfs... |
1758 |
mod_sysfs_teardown(mod); |
1da177e4c Linux-2.6.12-rc2 |
1759 |
|
944a1fa01 module: don't unl... |
1760 1761 |
/* We leave it in list to prevent duplicate loads, but make sure * that noone uses it while it's being deconstructed. */ |
d3051b489 modules, lock aro... |
1762 |
mutex_lock(&module_mutex); |
944a1fa01 module: don't unl... |
1763 |
mod->state = MODULE_STATE_UNFORMED; |
d3051b489 modules, lock aro... |
1764 |
mutex_unlock(&module_mutex); |
944a1fa01 module: don't unl... |
1765 |
|
b82bab4bb dynamic debug: mo... |
1766 1767 |
/* Remove dynamic debug info */ ddebug_remove_module(mod->name); |
1da177e4c Linux-2.6.12-rc2 |
1768 1769 1770 1771 1772 |
/* Arch-specific cleanup. */ module_arch_cleanup(mod); /* Module unload stuff */ module_unload_free(mod); |
e180a6b77 param: fix charp ... |
1773 1774 |
/* Free any allocated parameters. */ destroy_params(mod->kp, mod->num_kp); |
944a1fa01 module: don't unl... |
1775 1776 1777 1778 |
/* Now we can delete it from the lists */ mutex_lock(&module_mutex); stop_machine(__unlink_module, mod, NULL); mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
1779 |
/* This may be NULL, but that's OK */ |
01526ed08 module: split uns... |
1780 |
unset_module_init_ro_nx(mod); |
1da177e4c Linux-2.6.12-rc2 |
1781 1782 |
module_free(mod, mod->module_init); kfree(mod->args); |
259354dea module: encapsula... |
1783 |
percpu_modfree(mod); |
9f85a4bbb module: refactor ... |
1784 |
|
fbb9ce953 [PATCH] lockdep: ... |
1785 1786 |
/* Free lock-classes: */ lockdep_free_key_range(mod->module_core, mod->core_size); |
1da177e4c Linux-2.6.12-rc2 |
1787 |
/* Finally, free the core (containing the module structure) */ |
01526ed08 module: split uns... |
1788 |
unset_module_core_ro_nx(mod); |
1da177e4c Linux-2.6.12-rc2 |
1789 |
module_free(mod, mod->module_core); |
eb8cdec4a nommu: add suppor... |
1790 1791 1792 1793 |
#ifdef CONFIG_MPU update_protections(current->mm); #endif |
1da177e4c Linux-2.6.12-rc2 |
1794 1795 1796 1797 1798 |
} void *__symbol_get(const char *symbol) { struct module *owner; |
414fd31b2 module: Make find... |
1799 |
const struct kernel_symbol *sym; |
1da177e4c Linux-2.6.12-rc2 |
1800 |
|
24da1cbff modules: remove m... |
1801 |
preempt_disable(); |
414fd31b2 module: Make find... |
1802 1803 1804 |
sym = find_symbol(symbol, &owner, NULL, true, true); if (sym && strong_try_module_get(owner)) sym = NULL; |
24da1cbff modules: remove m... |
1805 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
1806 |
|
414fd31b2 module: Make find... |
1807 |
return sym ? (void *)sym->value : NULL; |
1da177e4c Linux-2.6.12-rc2 |
1808 1809 |
} EXPORT_SYMBOL_GPL(__symbol_get); |
eea8b54dc [PATCH] modules: ... |
1810 1811 |
/* * Ensure that an exported symbol [global namespace] does not already exist |
02a3e59a0 Fix minor typoes ... |
1812 |
* in the kernel or in some other module's exported symbol table. |
be593f4ce module: verify_ex... |
1813 1814 |
* * You must hold the module_mutex. |
eea8b54dc [PATCH] modules: ... |
1815 1816 1817 |
*/ static int verify_export_symbols(struct module *mod) { |
b211104d1 module: Enhance v... |
1818 |
unsigned int i; |
eea8b54dc [PATCH] modules: ... |
1819 |
struct module *owner; |
b211104d1 module: Enhance v... |
1820 1821 1822 1823 1824 1825 1826 1827 |
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... |
1828 |
#ifdef CONFIG_UNUSED_SYMBOLS |
b211104d1 module: Enhance v... |
1829 1830 |
{ mod->unused_syms, mod->num_unused_syms }, { mod->unused_gpl_syms, mod->num_unused_gpl_syms }, |
f7f5b6755 Shrink struct mod... |
1831 |
#endif |
b211104d1 module: Enhance v... |
1832 |
}; |
eea8b54dc [PATCH] modules: ... |
1833 |
|
b211104d1 module: Enhance v... |
1834 1835 |
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... |
1836 |
if (find_symbol(s->name, &owner, NULL, true, false)) { |
bddb12b32 kernel/module.c: ... |
1837 |
pr_err("%s: exports duplicate symbol %s" |
b211104d1 module: Enhance v... |
1838 1839 1840 1841 1842 |
" (owned by %s) ", mod->name, s->name, module_name(owner)); return -ENOEXEC; } |
eea8b54dc [PATCH] modules: ... |
1843 |
} |
b211104d1 module: Enhance v... |
1844 1845 |
} return 0; |
eea8b54dc [PATCH] modules: ... |
1846 |
} |
9a4b9708f module: fix and e... |
1847 |
/* Change all symbols so that st_value encodes the pointer directly. */ |
49668688d module: pass load... |
1848 1849 1850 1851 |
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 |
1852 |
unsigned long secbase; |
49668688d module: pass load... |
1853 |
unsigned int i; |
1da177e4c Linux-2.6.12-rc2 |
1854 |
int ret = 0; |
414fd31b2 module: Make find... |
1855 |
const struct kernel_symbol *ksym; |
1da177e4c Linux-2.6.12-rc2 |
1856 |
|
49668688d module: pass load... |
1857 1858 |
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 |
1859 1860 |
switch (sym[i].st_shndx) { case SHN_COMMON: |
80375980f lto: Handle LTO c... |
1861 1862 1863 |
/* Ignore common symbols */ if (!strncmp(name, "__gnu_lto", 9)) break; |
1da177e4c Linux-2.6.12-rc2 |
1864 1865 |
/* We compiled with -fno-common. These are not supposed to happen. */ |
5e1241692 module: replace D... |
1866 1867 |
pr_debug("Common symbol: %s ", name); |
1da177e4c Linux-2.6.12-rc2 |
1868 1869 1870 1871 1872 1873 1874 1875 |
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... |
1876 1877 |
pr_debug("Absolute symbol: 0x%08lx ", |
1da177e4c Linux-2.6.12-rc2 |
1878 1879 1880 1881 |
(long)sym[i].st_value); break; case SHN_UNDEF: |
49668688d module: pass load... |
1882 |
ksym = resolve_symbol_wait(mod, info, name); |
1da177e4c Linux-2.6.12-rc2 |
1883 |
/* Ok if resolved. */ |
9bea7f239 module: fix bne2 ... |
1884 |
if (ksym && !IS_ERR(ksym)) { |
414fd31b2 module: Make find... |
1885 |
sym[i].st_value = ksym->value; |
1da177e4c Linux-2.6.12-rc2 |
1886 |
break; |
414fd31b2 module: Make find... |
1887 |
} |
1da177e4c Linux-2.6.12-rc2 |
1888 |
/* Ok if weak. */ |
9bea7f239 module: fix bne2 ... |
1889 |
if (!ksym && ELF_ST_BIND(sym[i].st_info) == STB_WEAK) |
1da177e4c Linux-2.6.12-rc2 |
1890 |
break; |
bddb12b32 kernel/module.c: ... |
1891 1892 1893 |
pr_warn("%s: Unknown symbol %s (err %li) ", mod->name, name, PTR_ERR(ksym)); |
9bea7f239 module: fix bne2 ... |
1894 |
ret = PTR_ERR(ksym) ?: -ENOENT; |
1da177e4c Linux-2.6.12-rc2 |
1895 1896 1897 1898 |
break; default: /* Divert to percpu allocation if a percpu var. */ |
49668688d module: pass load... |
1899 |
if (sym[i].st_shndx == info->index.pcpu) |
259354dea module: encapsula... |
1900 |
secbase = (unsigned long)mod_percpu(mod); |
1da177e4c Linux-2.6.12-rc2 |
1901 |
else |
49668688d module: pass load... |
1902 |
secbase = info->sechdrs[sym[i].st_shndx].sh_addr; |
1da177e4c Linux-2.6.12-rc2 |
1903 1904 1905 1906 1907 1908 1909 |
sym[i].st_value += secbase; break; } } return ret; } |
49668688d module: pass load... |
1910 |
static int apply_relocations(struct module *mod, const struct load_info *info) |
22e268ebe module: refactor ... |
1911 1912 1913 1914 1915 |
{ unsigned int i; int err = 0; /* Now do relocations. */ |
49668688d module: pass load... |
1916 1917 |
for (i = 1; i < info->hdr->e_shnum; i++) { unsigned int infosec = info->sechdrs[i].sh_info; |
22e268ebe module: refactor ... |
1918 1919 |
/* Not a valid relocation section? */ |
49668688d module: pass load... |
1920 |
if (infosec >= info->hdr->e_shnum) |
22e268ebe module: refactor ... |
1921 1922 1923 |
continue; /* Don't bother with non-allocated sections */ |
49668688d module: pass load... |
1924 |
if (!(info->sechdrs[infosec].sh_flags & SHF_ALLOC)) |
22e268ebe module: refactor ... |
1925 |
continue; |
49668688d module: pass load... |
1926 1927 1928 1929 1930 1931 |
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 ... |
1932 1933 1934 1935 1936 |
if (err < 0) break; } return err; } |
088af9a6e module: fix modul... |
1937 1938 1939 1940 1941 1942 1943 |
/* 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 |
1944 |
/* Update size with this section: return offset. */ |
088af9a6e module: fix modul... |
1945 1946 |
static long get_offset(struct module *mod, unsigned int *size, Elf_Shdr *sechdr, unsigned int section) |
1da177e4c Linux-2.6.12-rc2 |
1947 1948 |
{ long ret; |
088af9a6e module: fix modul... |
1949 |
*size += arch_mod_section_prepend(mod, section); |
1da177e4c Linux-2.6.12-rc2 |
1950 1951 1952 1953 1954 1955 1956 1957 1958 |
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... |
1959 |
static void layout_sections(struct module *mod, struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 |
{ 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... |
1971 1972 |
for (i = 0; i < info->hdr->e_shnum; i++) info->sechdrs[i].sh_entsize = ~0UL; |
1da177e4c Linux-2.6.12-rc2 |
1973 |
|
5e1241692 module: replace D... |
1974 1975 |
pr_debug("Core section allocation order: "); |
1da177e4c Linux-2.6.12-rc2 |
1976 |
for (m = 0; m < ARRAY_SIZE(masks); ++m) { |
49668688d module: pass load... |
1977 1978 1979 |
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 |
1980 1981 1982 1983 |
if ((s->sh_flags & masks[m][0]) != masks[m][0] || (s->sh_flags & masks[m][1]) || s->sh_entsize != ~0UL |
49668688d module: pass load... |
1984 |
|| strstarts(sname, ".init")) |
1da177e4c Linux-2.6.12-rc2 |
1985 |
continue; |
088af9a6e module: fix modul... |
1986 |
s->sh_entsize = get_offset(mod, &mod->core_size, s, i); |
5e1241692 module: replace D... |
1987 1988 |
pr_debug("\t%s ", sname); |
1da177e4c Linux-2.6.12-rc2 |
1989 |
} |
84e1c6bb3 x86: Add RO/NX pr... |
1990 1991 1992 |
switch (m) { case 0: /* executable */ mod->core_size = debug_align(mod->core_size); |
1da177e4c Linux-2.6.12-rc2 |
1993 |
mod->core_text_size = mod->core_size; |
84e1c6bb3 x86: Add RO/NX pr... |
1994 1995 1996 1997 1998 1999 2000 2001 2002 |
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 |
2003 |
} |
5e1241692 module: replace D... |
2004 2005 |
pr_debug("Init section allocation order: "); |
1da177e4c Linux-2.6.12-rc2 |
2006 |
for (m = 0; m < ARRAY_SIZE(masks); ++m) { |
49668688d module: pass load... |
2007 2008 2009 |
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 |
2010 2011 2012 2013 |
if ((s->sh_flags & masks[m][0]) != masks[m][0] || (s->sh_flags & masks[m][1]) || s->sh_entsize != ~0UL |
49668688d module: pass load... |
2014 |
|| !strstarts(sname, ".init")) |
1da177e4c Linux-2.6.12-rc2 |
2015 |
continue; |
088af9a6e module: fix modul... |
2016 |
s->sh_entsize = (get_offset(mod, &mod->init_size, s, i) |
1da177e4c Linux-2.6.12-rc2 |
2017 |
| INIT_OFFSET_MASK); |
5e1241692 module: replace D... |
2018 2019 |
pr_debug("\t%s ", sname); |
1da177e4c Linux-2.6.12-rc2 |
2020 |
} |
84e1c6bb3 x86: Add RO/NX pr... |
2021 2022 2023 |
switch (m) { case 0: /* executable */ mod->init_size = debug_align(mod->init_size); |
1da177e4c Linux-2.6.12-rc2 |
2024 |
mod->init_text_size = mod->init_size; |
84e1c6bb3 x86: Add RO/NX pr... |
2025 2026 2027 2028 2029 2030 2031 2032 2033 |
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 |
2034 2035 |
} } |
1da177e4c Linux-2.6.12-rc2 |
2036 2037 2038 2039 |
static void set_license(struct module *mod, const char *license) { if (!license) license = "unspecified"; |
fa3ba2e81 [PATCH] fix Modul... |
2040 |
if (!license_is_gpl_compatible(license)) { |
25ddbb18a Make the taint fl... |
2041 |
if (!test_taint(TAINT_PROPRIETARY_MODULE)) |
bddb12b32 kernel/module.c: ... |
2042 2043 2044 |
pr_warn("%s: module license '%s' taints kernel. ", mod->name, license); |
373d4d099 taint: add explic... |
2045 2046 |
add_taint_module(mod, TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
1da177e4c Linux-2.6.12-rc2 |
2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 |
} } /* 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... |
2068 |
static char *get_modinfo(struct load_info *info, const char *tag) |
1da177e4c Linux-2.6.12-rc2 |
2069 2070 2071 |
{ char *p; unsigned int taglen = strlen(tag); |
49668688d module: pass load... |
2072 2073 |
Elf_Shdr *infosec = &info->sechdrs[info->index.info]; unsigned long size = infosec->sh_size; |
1da177e4c Linux-2.6.12-rc2 |
2074 |
|
49668688d module: pass load... |
2075 |
for (p = (char *)infosec->sh_addr; p; p = next_string(p, &size)) { |
1da177e4c Linux-2.6.12-rc2 |
2076 2077 2078 2079 2080 |
if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=') return p + taglen + 1; } return NULL; } |
49668688d module: pass load... |
2081 |
static void setup_modinfo(struct module *mod, struct load_info *info) |
c988d2b28 [PATCH] modules: ... |
2082 2083 2084 2085 2086 2087 |
{ struct module_attribute *attr; int i; for (i = 0; (attr = modinfo_attrs[i]); i++) { if (attr->setup) |
49668688d module: pass load... |
2088 |
attr->setup(mod, get_modinfo(info, attr->attr.name)); |
c988d2b28 [PATCH] modules: ... |
2089 2090 |
} } |
c988d2b28 [PATCH] modules: ... |
2091 |
|
a263f7763 module: fix memor... |
2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 |
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 |
2102 |
#ifdef CONFIG_KALLSYMS |
15bba37d6 module: fix build... |
2103 2104 2105 2106 2107 2108 |
/* 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... |
2109 2110 |
return bsearch(name, start, stop - start, sizeof(struct kernel_symbol), cmp_name); |
15bba37d6 module: fix build... |
2111 |
} |
ca4787b77 kernel/module.c: ... |
2112 2113 |
static int is_exported(const char *name, unsigned long value, const struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
2114 |
{ |
ca4787b77 kernel/module.c: ... |
2115 2116 2117 |
const struct kernel_symbol *ks; if (!mod) ks = lookup_symbol(name, __start___ksymtab, __stop___ksymtab); |
3fd6805f4 [PATCH] Clean up ... |
2118 |
else |
ca4787b77 kernel/module.c: ... |
2119 2120 |
ks = lookup_symbol(name, mod->syms, mod->syms + mod->num_syms); return ks != NULL && ks->value == value; |
1da177e4c Linux-2.6.12-rc2 |
2121 2122 2123 |
} /* As per nm */ |
eded41c1c module: kallsyms ... |
2124 |
static char elf_type(const Elf_Sym *sym, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2125 |
{ |
eded41c1c module: kallsyms ... |
2126 |
const Elf_Shdr *sechdrs = info->sechdrs; |
1da177e4c Linux-2.6.12-rc2 |
2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 |
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 ... |
2156 2157 |
if (strstarts(info->secstrings + sechdrs[sym->st_shndx].sh_name, ".debug")) { |
1da177e4c Linux-2.6.12-rc2 |
2158 |
return 'n'; |
eded41c1c module: kallsyms ... |
2159 |
} |
1da177e4c Linux-2.6.12-rc2 |
2160 2161 |
return '?'; } |
4a4962263 module: reduce sy... |
2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 |
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... |
2182 2183 2184 2185 2186 2187 2188 |
/* * 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... |
2189 |
static void layout_symtab(struct module *mod, struct load_info *info) |
4a4962263 module: reduce sy... |
2190 |
{ |
49668688d module: pass load... |
2191 2192 |
Elf_Shdr *symsect = info->sechdrs + info->index.sym; Elf_Shdr *strsect = info->sechdrs + info->index.str; |
4a4962263 module: reduce sy... |
2193 |
const Elf_Sym *src; |
54523ec71 module: Remove a ... |
2194 |
unsigned int i, nsrc, ndst, strtab_size = 0; |
4a4962263 module: reduce sy... |
2195 2196 2197 2198 |
/* 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... |
2199 |
info->index.sym) | INIT_OFFSET_MASK; |
5e1241692 module: replace D... |
2200 2201 |
pr_debug("\t%s ", info->secstrings + symsect->sh_name); |
4a4962263 module: reduce sy... |
2202 |
|
49668688d module: pass load... |
2203 |
src = (void *)info->hdr + symsect->sh_offset; |
4a4962263 module: reduce sy... |
2204 |
nsrc = symsect->sh_size / sizeof(*src); |
70b1e9161 module: Add comme... |
2205 |
|
48fd11880 module: Fix perfo... |
2206 |
/* Compute total space required for the core symbols' strtab. */ |
59ef28b1f module: fix out-b... |
2207 2208 2209 2210 |
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... |
2211 |
ndst++; |
554bdfe5a module: reduce st... |
2212 |
} |
59ef28b1f module: fix out-b... |
2213 |
} |
4a4962263 module: reduce sy... |
2214 2215 |
/* Append room for core symbols at end of core part. */ |
49668688d module: pass load... |
2216 |
info->symoffs = ALIGN(mod->core_size, symsect->sh_addralign ?: 1); |
48fd11880 module: Fix perfo... |
2217 2218 |
info->stroffs = mod->core_size = info->symoffs + ndst * sizeof(Elf_Sym); mod->core_size += strtab_size; |
4a4962263 module: reduce sy... |
2219 |
|
554bdfe5a module: reduce st... |
2220 2221 2222 |
/* 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... |
2223 |
info->index.str) | INIT_OFFSET_MASK; |
5e1241692 module: replace D... |
2224 2225 |
pr_debug("\t%s ", info->secstrings + strsect->sh_name); |
4a4962263 module: reduce sy... |
2226 |
} |
811d66a0e module: group pos... |
2227 |
static void add_kallsyms(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2228 |
{ |
4a4962263 module: reduce sy... |
2229 2230 2231 |
unsigned int i, ndst; const Elf_Sym *src; Elf_Sym *dst; |
554bdfe5a module: reduce st... |
2232 |
char *s; |
eded41c1c module: kallsyms ... |
2233 |
Elf_Shdr *symsec = &info->sechdrs[info->index.sym]; |
1da177e4c Linux-2.6.12-rc2 |
2234 |
|
eded41c1c module: kallsyms ... |
2235 2236 |
mod->symtab = (void *)symsec->sh_addr; mod->num_symtab = symsec->sh_size / sizeof(Elf_Sym); |
511ca6ae4 module: fix crash... |
2237 2238 |
/* 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 |
2239 2240 2241 |
/* Set types up while we still have access to sections. */ for (i = 0; i < mod->num_symtab; i++) |
eded41c1c module: kallsyms ... |
2242 |
mod->symtab[i].st_info = elf_type(&mod->symtab[i], info); |
4a4962263 module: reduce sy... |
2243 |
|
d913188c7 module: layout_an... |
2244 |
mod->core_symtab = dst = mod->module_core + info->symoffs; |
48fd11880 module: Fix perfo... |
2245 |
mod->core_strtab = s = mod->module_core + info->stroffs; |
4a4962263 module: reduce sy... |
2246 |
src = mod->symtab; |
59ef28b1f module: fix out-b... |
2247 2248 2249 2250 2251 2252 2253 2254 |
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... |
2255 2256 |
} mod->core_num_syms = ndst; |
1da177e4c Linux-2.6.12-rc2 |
2257 2258 |
} #else |
49668688d module: pass load... |
2259 |
static inline void layout_symtab(struct module *mod, struct load_info *info) |
4a4962263 module: reduce sy... |
2260 2261 |
{ } |
3ae91c21d module: fix up CO... |
2262 |
|
abbce906d (trivial) Fix com... |
2263 |
static void add_kallsyms(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2264 2265 2266 |
{ } #endif /* CONFIG_KALLSYMS */ |
e9d376f0f dynamic debug: co... |
2267 |
static void dynamic_debug_setup(struct _ddebug *debug, unsigned int num) |
346e15beb driver core: basi... |
2268 |
{ |
811d66a0e module: group pos... |
2269 2270 |
if (!debug) return; |
e9d376f0f dynamic debug: co... |
2271 2272 |
#ifdef CONFIG_DYNAMIC_DEBUG if (ddebug_add_module(debug, num, debug->modname)) |
bddb12b32 kernel/module.c: ... |
2273 2274 2275 |
pr_err("dynamic debug error adding module: %s ", debug->modname); |
e9d376f0f dynamic debug: co... |
2276 |
#endif |
5e458cc0f module: simplify ... |
2277 |
} |
346e15beb driver core: basi... |
2278 |
|
ff49d74ad module: initializ... |
2279 2280 2281 2282 2283 |
static void dynamic_debug_remove(struct _ddebug *debug) { if (debug) ddebug_remove_module(debug->modname); } |
74e08fcf7 modules: add defa... |
2284 2285 |
void * __weak module_alloc(unsigned long size) { |
82fab442f modules: don't ha... |
2286 |
return vmalloc_exec(size); |
74e08fcf7 modules: add defa... |
2287 |
} |
3a642e99b modules: Take a s... |
2288 2289 2290 2291 2292 |
static void *module_alloc_update_bounds(unsigned long size) { void *ret = module_alloc(size); if (ret) { |
75676500f module: make lock... |
2293 |
mutex_lock(&module_mutex); |
3a642e99b modules: Take a s... |
2294 2295 2296 2297 2298 |
/* 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... |
2299 |
mutex_unlock(&module_mutex); |
3a642e99b modules: Take a s... |
2300 2301 2302 |
} return ret; } |
4f2294b6d kmemleak: Add mod... |
2303 |
#ifdef CONFIG_DEBUG_KMEMLEAK |
49668688d module: pass load... |
2304 2305 |
static void kmemleak_load_module(const struct module *mod, const struct load_info *info) |
4f2294b6d kmemleak: Add mod... |
2306 2307 2308 2309 |
{ unsigned int i; /* only scan the sections containing data */ |
c017b4be3 kmemleak: Simplif... |
2310 |
kmemleak_scan_area(mod, sizeof(struct module), GFP_KERNEL); |
4f2294b6d kmemleak: Add mod... |
2311 |
|
49668688d module: pass load... |
2312 |
for (i = 1; i < info->hdr->e_shnum; i++) { |
06c9494c0 kmemleak: Scan al... |
2313 2314 2315 2316 |
/* Scan all writable sections that's not executable */ if (!(info->sechdrs[i].sh_flags & SHF_ALLOC) || !(info->sechdrs[i].sh_flags & SHF_WRITE) || (info->sechdrs[i].sh_flags & SHF_EXECINSTR)) |
4f2294b6d kmemleak: Add mod... |
2317 |
continue; |
49668688d module: pass load... |
2318 2319 |
kmemleak_scan_area((void *)info->sechdrs[i].sh_addr, info->sechdrs[i].sh_size, GFP_KERNEL); |
4f2294b6d kmemleak: Add mod... |
2320 2321 2322 |
} } #else |
49668688d module: pass load... |
2323 2324 |
static inline void kmemleak_load_module(const struct module *mod, const struct load_info *info) |
4f2294b6d kmemleak: Add mod... |
2325 2326 2327 |
{ } #endif |
106a4ee25 module: signature... |
2328 |
#ifdef CONFIG_MODULE_SIG |
34e1169d9 module: add sysca... |
2329 |
static int module_sig_check(struct load_info *info) |
106a4ee25 module: signature... |
2330 2331 |
{ int err = -ENOKEY; |
34e1169d9 module: add sysca... |
2332 2333 |
const unsigned long markerlen = sizeof(MODULE_SIG_STRING) - 1; const void *mod = info->hdr; |
caabe2405 MODSIGN: Move the... |
2334 |
|
34e1169d9 module: add sysca... |
2335 2336 |
if (info->len > markerlen && memcmp(mod + info->len - markerlen, MODULE_SIG_STRING, markerlen) == 0) { |
caabe2405 MODSIGN: Move the... |
2337 |
/* We truncate the module to discard the signature */ |
34e1169d9 module: add sysca... |
2338 2339 |
info->len -= markerlen; err = mod_verify_sig(mod, &info->len); |
106a4ee25 module: signature... |
2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 |
} if (!err) { info->sig_ok = true; return 0; } /* Not having a signature is only an error if we're strict. */ if (err == -ENOKEY && !sig_enforce) err = 0; return err; } #else /* !CONFIG_MODULE_SIG */ |
34e1169d9 module: add sysca... |
2354 |
static int module_sig_check(struct load_info *info) |
106a4ee25 module: signature... |
2355 2356 2357 2358 |
{ return 0; } #endif /* !CONFIG_MODULE_SIG */ |
34e1169d9 module: add sysca... |
2359 2360 |
/* Sanity checks against invalid binaries, wrong arch, weird elf version. */ static int elf_header_check(struct load_info *info) |
40dd2560e module: refactor ... |
2361 |
{ |
34e1169d9 module: add sysca... |
2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 |
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 ... |
2375 |
|
34e1169d9 module: add sysca... |
2376 2377 2378 2379 2380 2381 |
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 ... |
2382 2383 |
{ int err; |
40dd2560e module: refactor ... |
2384 |
|
34e1169d9 module: add sysca... |
2385 2386 |
info->len = len; if (info->len < sizeof(*(info->hdr))) |
40dd2560e module: refactor ... |
2387 |
return -ENOEXEC; |
2e72d51b4 security: introdu... |
2388 2389 2390 |
err = security_kernel_module_from_file(NULL); if (err) return err; |
40dd2560e module: refactor ... |
2391 |
/* Suck in entire file: we'll want most of it. */ |
34e1169d9 module: add sysca... |
2392 2393 |
info->hdr = vmalloc(info->len); if (!info->hdr) |
40dd2560e module: refactor ... |
2394 |
return -ENOMEM; |
34e1169d9 module: add sysca... |
2395 2396 2397 |
if (copy_from_user(info->hdr, umod, info->len) != 0) { vfree(info->hdr); return -EFAULT; |
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_fd(int fd, struct load_info *info) { |
a2e0578be switch copy_modul... |
2405 |
struct fd f = fdget(fd); |
34e1169d9 module: add sysca... |
2406 2407 2408 2409 |
int err; struct kstat stat; loff_t pos; ssize_t bytes = 0; |
a2e0578be switch copy_modul... |
2410 |
if (!f.file) |
34e1169d9 module: add sysca... |
2411 |
return -ENOEXEC; |
a2e0578be switch copy_modul... |
2412 |
err = security_kernel_module_from_file(f.file); |
106a4ee25 module: signature... |
2413 |
if (err) |
2e72d51b4 security: introdu... |
2414 |
goto out; |
106a4ee25 module: signature... |
2415 |
|
a2e0578be switch copy_modul... |
2416 |
err = vfs_getattr(&f.file->f_path, &stat); |
106a4ee25 module: signature... |
2417 |
if (err) |
34e1169d9 module: add sysca... |
2418 |
goto out; |
40dd2560e module: refactor ... |
2419 |
|
34e1169d9 module: add sysca... |
2420 2421 2422 |
if (stat.size > INT_MAX) { err = -EFBIG; goto out; |
40dd2560e module: refactor ... |
2423 |
} |
52441fa8f module: prevent w... |
2424 2425 2426 2427 2428 2429 |
/* Don't hand 0 to vmalloc, it whines. */ if (stat.size == 0) { err = -EINVAL; goto out; } |
34e1169d9 module: add sysca... |
2430 2431 2432 2433 |
info->hdr = vmalloc(stat.size); if (!info->hdr) { err = -ENOMEM; goto out; |
40dd2560e module: refactor ... |
2434 |
} |
d913188c7 module: layout_an... |
2435 |
|
34e1169d9 module: add sysca... |
2436 2437 |
pos = 0; while (pos < stat.size) { |
a2e0578be switch copy_modul... |
2438 |
bytes = kernel_read(f.file, pos, (char *)(info->hdr) + pos, |
34e1169d9 module: add sysca... |
2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 |
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 ... |
2450 |
|
34e1169d9 module: add sysca... |
2451 |
out: |
a2e0578be switch copy_modul... |
2452 |
fdput(f); |
40dd2560e module: refactor ... |
2453 2454 |
return err; } |
d913188c7 module: layout_an... |
2455 2456 |
static void free_copy(struct load_info *info) { |
d913188c7 module: layout_an... |
2457 2458 |
vfree(info->hdr); } |
2f3238aeb module: add flags... |
2459 |
static int rewrite_section_headers(struct load_info *info, int flags) |
8b5f61a79 module: refactor ... |
2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 |
{ 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) { |
bddb12b32 kernel/module.c: ... |
2470 2471 |
pr_err("Module len %lu truncated ", info->len); |
8b5f61a79 module: refactor ... |
2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 |
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 ... |
2484 |
} |
d6df72a06 module: refactor ... |
2485 2486 |
/* Track but don't keep modinfo and version sections. */ |
2f3238aeb module: add flags... |
2487 2488 2489 2490 |
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... |
2491 |
info->index.info = find_sec(info, ".modinfo"); |
d6df72a06 module: refactor ... |
2492 2493 |
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 ... |
2494 2495 |
return 0; } |
3264d3f9d module: add load_... |
2496 2497 2498 2499 2500 2501 2502 2503 |
/* * 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... |
2504 |
static struct module *setup_load_info(struct load_info *info, int flags) |
3264d3f9d module: add load_... |
2505 2506 |
{ unsigned int i; |
8b5f61a79 module: refactor ... |
2507 |
int err; |
3264d3f9d module: add load_... |
2508 2509 2510 2511 |
struct module *mod; /* Set up the convenience variables */ info->sechdrs = (void *)info->hdr + info->hdr->e_shoff; |
8b5f61a79 module: refactor ... |
2512 2513 |
info->secstrings = (void *)info->hdr + info->sechdrs[info->hdr->e_shstrndx].sh_offset; |
3264d3f9d module: add load_... |
2514 |
|
2f3238aeb module: add flags... |
2515 |
err = rewrite_section_headers(info, flags); |
8b5f61a79 module: refactor ... |
2516 2517 |
if (err) return ERR_PTR(err); |
3264d3f9d module: add load_... |
2518 |
|
8b5f61a79 module: refactor ... |
2519 2520 |
/* Find internal symbols and strings. */ for (i = 1; i < info->hdr->e_shnum; i++) { |
3264d3f9d module: add load_... |
2521 2522 2523 |
if (info->sechdrs[i].sh_type == SHT_SYMTAB) { info->index.sym = i; info->index.str = info->sechdrs[i].sh_link; |
8b5f61a79 module: refactor ... |
2524 2525 2526 |
info->strtab = (char *)info->hdr + info->sechdrs[info->index.str].sh_offset; break; |
3264d3f9d module: add load_... |
2527 |
} |
3264d3f9d module: add load_... |
2528 |
} |
49668688d module: pass load... |
2529 |
info->index.mod = find_sec(info, ".gnu.linkonce.this_module"); |
3264d3f9d module: add load_... |
2530 |
if (!info->index.mod) { |
bddb12b32 kernel/module.c: ... |
2531 2532 |
pr_warn("No module found in object "); |
3264d3f9d module: add load_... |
2533 2534 2535 2536 2537 2538 |
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) { |
bddb12b32 kernel/module.c: ... |
2539 2540 |
pr_warn("%s: module has no symbols (stripped?) ", mod->name); |
3264d3f9d module: add load_... |
2541 2542 |
return ERR_PTR(-ENOEXEC); } |
49668688d module: pass load... |
2543 |
info->index.pcpu = find_pcpusec(info); |
3264d3f9d module: add load_... |
2544 |
|
3264d3f9d module: add load_... |
2545 2546 2547 2548 2549 |
/* 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_... |
2550 |
} |
2f3238aeb module: add flags... |
2551 |
static int check_modinfo(struct module *mod, struct load_info *info, int flags) |
40dd2560e module: refactor ... |
2552 |
{ |
49668688d module: pass load... |
2553 |
const char *modmagic = get_modinfo(info, "vermagic"); |
40dd2560e module: refactor ... |
2554 |
int err; |
2f3238aeb module: add flags... |
2555 2556 |
if (flags & MODULE_INIT_IGNORE_VERMAGIC) modmagic = NULL; |
40dd2560e module: refactor ... |
2557 2558 2559 2560 2561 |
/* 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... |
2562 |
} else if (!same_magic(modmagic, vermagic, info->index.vers)) { |
bddb12b32 kernel/module.c: ... |
2563 2564 |
pr_err("%s: version magic '%s' should be '%s' ", |
40dd2560e module: refactor ... |
2565 2566 2567 |
mod->name, modmagic, vermagic); return -ENOEXEC; } |
2449b8ba0 module,bug: Add T... |
2568 |
if (!get_modinfo(info, "intree")) |
373d4d099 taint: add explic... |
2569 |
add_taint_module(mod, TAINT_OOT_MODULE, LOCKDEP_STILL_OK); |
2449b8ba0 module,bug: Add T... |
2570 |
|
49668688d module: pass load... |
2571 |
if (get_modinfo(info, "staging")) { |
373d4d099 taint: add explic... |
2572 |
add_taint_module(mod, TAINT_CRAP, LOCKDEP_STILL_OK); |
bddb12b32 kernel/module.c: ... |
2573 2574 2575 |
pr_warn("%s: module is from the staging directory, the quality " "is unknown, you have been warned. ", mod->name); |
40dd2560e module: refactor ... |
2576 |
} |
22e268ebe module: refactor ... |
2577 2578 |
/* Set up license info based on the info section */ |
49668688d module: pass load... |
2579 |
set_license(mod, get_modinfo(info, "license")); |
22e268ebe module: refactor ... |
2580 |
|
40dd2560e module: refactor ... |
2581 2582 |
return 0; } |
eb3057df7 kernel: add suppo... |
2583 |
static int find_module_sections(struct module *mod, struct load_info *info) |
f91a13bb9 module: refactor ... |
2584 |
{ |
49668688d module: pass load... |
2585 |
mod->kp = section_objs(info, "__param", |
f91a13bb9 module: refactor ... |
2586 |
sizeof(*mod->kp), &mod->num_kp); |
49668688d module: pass load... |
2587 |
mod->syms = section_objs(info, "__ksymtab", |
f91a13bb9 module: refactor ... |
2588 |
sizeof(*mod->syms), &mod->num_syms); |
49668688d module: pass load... |
2589 2590 |
mod->crcs = section_addr(info, "__kcrctab"); mod->gpl_syms = section_objs(info, "__ksymtab_gpl", |
f91a13bb9 module: refactor ... |
2591 2592 |
sizeof(*mod->gpl_syms), &mod->num_gpl_syms); |
49668688d module: pass load... |
2593 2594 |
mod->gpl_crcs = section_addr(info, "__kcrctab_gpl"); mod->gpl_future_syms = section_objs(info, |
f91a13bb9 module: refactor ... |
2595 2596 2597 |
"__ksymtab_gpl_future", sizeof(*mod->gpl_future_syms), &mod->num_gpl_future_syms); |
49668688d module: pass load... |
2598 |
mod->gpl_future_crcs = section_addr(info, "__kcrctab_gpl_future"); |
f91a13bb9 module: refactor ... |
2599 2600 |
#ifdef CONFIG_UNUSED_SYMBOLS |
49668688d module: pass load... |
2601 |
mod->unused_syms = section_objs(info, "__ksymtab_unused", |
f91a13bb9 module: refactor ... |
2602 2603 |
sizeof(*mod->unused_syms), &mod->num_unused_syms); |
49668688d module: pass load... |
2604 2605 |
mod->unused_crcs = section_addr(info, "__kcrctab_unused"); mod->unused_gpl_syms = section_objs(info, "__ksymtab_unused_gpl", |
f91a13bb9 module: refactor ... |
2606 2607 |
sizeof(*mod->unused_gpl_syms), &mod->num_unused_gpl_syms); |
49668688d module: pass load... |
2608 |
mod->unused_gpl_crcs = section_addr(info, "__kcrctab_unused_gpl"); |
f91a13bb9 module: refactor ... |
2609 2610 |
#endif #ifdef CONFIG_CONSTRUCTORS |
49668688d module: pass load... |
2611 |
mod->ctors = section_objs(info, ".ctors", |
f91a13bb9 module: refactor ... |
2612 |
sizeof(*mod->ctors), &mod->num_ctors); |
eb3057df7 kernel: add suppo... |
2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 |
if (!mod->ctors) mod->ctors = section_objs(info, ".init_array", sizeof(*mod->ctors), &mod->num_ctors); else if (find_sec(info, ".init_array")) { /* * This shouldn't happen with same compiler and binutils * building all parts of the module. */ printk(KERN_WARNING "%s: has both .ctors and .init_array. ", mod->name); return -EINVAL; } |
f91a13bb9 module: refactor ... |
2626 2627 2628 |
#endif #ifdef CONFIG_TRACEPOINTS |
654986462 tracepoints: Fix ... |
2629 2630 2631 |
mod->tracepoints_ptrs = section_objs(info, "__tracepoints_ptrs", sizeof(*mod->tracepoints_ptrs), &mod->num_tracepoints); |
f91a13bb9 module: refactor ... |
2632 |
#endif |
bf5438fca jump label: Base ... |
2633 2634 2635 2636 2637 |
#ifdef HAVE_JUMP_LABEL mod->jump_entries = section_objs(info, "__jump_table", sizeof(*mod->jump_entries), &mod->num_jump_entries); #endif |
f91a13bb9 module: refactor ... |
2638 |
#ifdef CONFIG_EVENT_TRACING |
49668688d module: pass load... |
2639 |
mod->trace_events = section_objs(info, "_ftrace_events", |
f91a13bb9 module: refactor ... |
2640 2641 |
sizeof(*mod->trace_events), &mod->num_trace_events); |
f91a13bb9 module: refactor ... |
2642 |
#endif |
13b9b6e74 tracing: Fix modu... |
2643 2644 2645 2646 |
#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); |
13b9b6e74 tracing: Fix modu... |
2647 |
#endif |
f91a13bb9 module: refactor ... |
2648 2649 |
#ifdef CONFIG_FTRACE_MCOUNT_RECORD /* sechdrs[0].sh_size is always zero */ |
49668688d module: pass load... |
2650 |
mod->ftrace_callsites = section_objs(info, "__mcount_loc", |
f91a13bb9 module: refactor ... |
2651 2652 2653 |
sizeof(*mod->ftrace_callsites), &mod->num_ftrace_callsites); #endif |
22e268ebe module: refactor ... |
2654 |
|
811d66a0e module: group pos... |
2655 2656 |
mod->extable = section_objs(info, "__ex_table", sizeof(*mod->extable), &mod->num_exentries); |
49668688d module: pass load... |
2657 |
if (section_addr(info, "__obsparm")) |
bddb12b32 kernel/module.c: ... |
2658 2659 |
pr_warn("%s: Ignoring obsolete parameters ", mod->name); |
811d66a0e module: group pos... |
2660 2661 2662 |
info->debug = section_objs(info, "__verbose", sizeof(*info->debug), &info->num_debug); |
eb3057df7 kernel: add suppo... |
2663 2664 |
return 0; |
f91a13bb9 module: refactor ... |
2665 |
} |
49668688d module: pass load... |
2666 |
static int move_module(struct module *mod, struct load_info *info) |
65b8a9b4d module: refactor ... |
2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 |
{ 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... |
2680 |
return -ENOMEM; |
65b8a9b4d module: refactor ... |
2681 2682 2683 |
memset(ptr, 0, mod->core_size); mod->module_core = ptr; |
82fab442f modules: don't ha... |
2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 |
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 ... |
2701 2702 |
/* Transfer each section which specifies SHF_ALLOC */ |
5e1241692 module: replace D... |
2703 2704 |
pr_debug("final section addresses: "); |
49668688d module: pass load... |
2705 |
for (i = 0; i < info->hdr->e_shnum; i++) { |
65b8a9b4d module: refactor ... |
2706 |
void *dest; |
49668688d module: pass load... |
2707 |
Elf_Shdr *shdr = &info->sechdrs[i]; |
65b8a9b4d module: refactor ... |
2708 |
|
49668688d module: pass load... |
2709 |
if (!(shdr->sh_flags & SHF_ALLOC)) |
65b8a9b4d module: refactor ... |
2710 |
continue; |
49668688d module: pass load... |
2711 |
if (shdr->sh_entsize & INIT_OFFSET_MASK) |
65b8a9b4d module: refactor ... |
2712 |
dest = mod->module_init |
49668688d module: pass load... |
2713 |
+ (shdr->sh_entsize & ~INIT_OFFSET_MASK); |
65b8a9b4d module: refactor ... |
2714 |
else |
49668688d module: pass load... |
2715 |
dest = mod->module_core + shdr->sh_entsize; |
65b8a9b4d module: refactor ... |
2716 |
|
49668688d module: pass load... |
2717 2718 |
if (shdr->sh_type != SHT_NOBITS) memcpy(dest, (void *)shdr->sh_addr, shdr->sh_size); |
65b8a9b4d module: refactor ... |
2719 |
/* Update sh_addr to point to copy in image. */ |
49668688d module: pass load... |
2720 |
shdr->sh_addr = (unsigned long)dest; |
5e1241692 module: replace D... |
2721 2722 2723 |
pr_debug("\t0x%lx %s ", (long)shdr->sh_addr, info->secstrings + shdr->sh_name); |
65b8a9b4d module: refactor ... |
2724 |
} |
d913188c7 module: layout_an... |
2725 2726 |
return 0; |
65b8a9b4d module: refactor ... |
2727 |
} |
49668688d module: pass load... |
2728 |
static int check_module_license_and_versions(struct module *mod) |
22e268ebe module: refactor ... |
2729 2730 2731 2732 2733 2734 2735 |
{ /* * 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... |
2736 |
add_taint(TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
22e268ebe module: refactor ... |
2737 2738 2739 |
/* driverloader was caught wrongly pretending to be under GPL */ if (strcmp(mod->name, "driverloader") == 0) |
373d4d099 taint: add explic... |
2740 2741 |
add_taint_module(mod, TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
22e268ebe module: refactor ... |
2742 |
|
c99af3752 module: taint ker... |
2743 2744 |
/* lve claims to be GPL but upstream won't provide source */ if (strcmp(mod->name, "lve") == 0) |
373d4d099 taint: add explic... |
2745 2746 |
add_taint_module(mod, TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); |
c99af3752 module: taint ker... |
2747 |
|
22e268ebe module: refactor ... |
2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 |
#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... |
2786 2787 2788 2789 2790 2791 2792 |
int __weak module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, char *secstrings, struct module *mod) { return 0; } |
2f3238aeb module: add flags... |
2793 |
static struct module *layout_and_allocate(struct load_info *info, int flags) |
1da177e4c Linux-2.6.12-rc2 |
2794 |
{ |
d913188c7 module: layout_an... |
2795 |
/* Module within temporary copy. */ |
1da177e4c Linux-2.6.12-rc2 |
2796 |
struct module *mod; |
d913188c7 module: layout_an... |
2797 |
int err; |
3ae91c21d module: fix up CO... |
2798 |
|
2f3238aeb module: add flags... |
2799 |
mod = setup_load_info(info, flags); |
d913188c7 module: layout_an... |
2800 2801 |
if (IS_ERR(mod)) return mod; |
1da177e4c Linux-2.6.12-rc2 |
2802 |
|
2f3238aeb module: add flags... |
2803 |
err = check_modinfo(mod, info, flags); |
40dd2560e module: refactor ... |
2804 2805 |
if (err) return ERR_PTR(err); |
1da177e4c Linux-2.6.12-rc2 |
2806 |
|
1da177e4c Linux-2.6.12-rc2 |
2807 |
/* Allow arches to frob section contents and sizes. */ |
49668688d module: pass load... |
2808 2809 |
err = module_frob_arch_sections(info->hdr, info->sechdrs, info->secstrings, mod); |
1da177e4c Linux-2.6.12-rc2 |
2810 |
if (err < 0) |
8d8022e8a module: do percpu... |
2811 |
return ERR_PTR(err); |
1da177e4c Linux-2.6.12-rc2 |
2812 |
|
8d8022e8a module: do percpu... |
2813 2814 |
/* We will do a special allocation for per-cpu sections later. */ info->sechdrs[info->index.pcpu].sh_flags &= ~(unsigned long)SHF_ALLOC; |
1da177e4c Linux-2.6.12-rc2 |
2815 2816 2817 2818 |
/* 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... |
2819 |
layout_sections(mod, info); |
49668688d module: pass load... |
2820 |
layout_symtab(mod, info); |
1da177e4c Linux-2.6.12-rc2 |
2821 |
|
65b8a9b4d module: refactor ... |
2822 |
/* Allocate and move to the final place */ |
49668688d module: pass load... |
2823 |
err = move_module(mod, info); |
d913188c7 module: layout_an... |
2824 |
if (err) |
8d8022e8a module: do percpu... |
2825 |
return ERR_PTR(err); |
d913188c7 module: layout_an... |
2826 2827 2828 |
/* Module has been copied to its final place now: return it. */ mod = (void *)info->sechdrs[info->index.mod].sh_addr; |
49668688d module: pass load... |
2829 |
kmemleak_load_module(mod, info); |
d913188c7 module: layout_an... |
2830 |
return mod; |
d913188c7 module: layout_an... |
2831 2832 2833 2834 2835 |
} /* mod is no longer valid after this! */ static void module_deallocate(struct module *mod, struct load_info *info) { |
d913188c7 module: layout_an... |
2836 2837 2838 2839 |
percpu_modfree(mod); module_free(mod, mod->module_init); module_free(mod, mod->module_core); } |
74e08fcf7 modules: add defa... |
2840 2841 2842 2843 2844 2845 |
int __weak module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *me) { return 0; } |
811d66a0e module: group pos... |
2846 2847 |
static int post_relocation(struct module *mod, const struct load_info *info) { |
51f3d0f47 module: cleanup c... |
2848 |
/* Sort exception table now relocations are done. */ |
811d66a0e module: group pos... |
2849 2850 2851 2852 2853 |
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... |
2854 |
/* Setup kallsyms-specific fields. */ |
811d66a0e module: group pos... |
2855 2856 2857 2858 2859 |
add_kallsyms(mod, info); /* Arch-specific module finalizing. */ return module_finalize(info->hdr, info->sechdrs, mod); } |
9bb9c3be5 module: wait when... |
2860 2861 2862 2863 2864 2865 2866 |
/* 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); |
4f6de4d51 module: don't mod... |
2867 |
mod = find_module_all(name, strlen(name), true); |
0d21b0e34 module: add new s... |
2868 2869 |
ret = !mod || mod->state == MODULE_STATE_LIVE || mod->state == MODULE_STATE_GOING; |
9bb9c3be5 module: wait when... |
2870 2871 2872 2873 |
mutex_unlock(&module_mutex); return ret; } |
34e1169d9 module: add sysca... |
2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 |
/* 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... |
2889 2890 2891 2892 2893 |
/* * 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... |
2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 |
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) { |
bddb12b32 kernel/module.c: ... |
2911 2912 2913 2914 2915 2916 |
pr_warn("%s: '%s'->init suspiciously returned %d, it should " "follow 0/-E convention " "%s: loading module anyway... ", __func__, mod->name, ret, __func__); |
34e1169d9 module: add sysca... |
2917 2918 2919 2920 2921 2922 2923 |
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... |
2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 |
/* * 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... |
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 |
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 ... |
2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 |
/* * 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); |
4f6de4d51 module: don't mod... |
2986 2987 |
old = find_module_all(mod->name, strlen(mod->name), true); if (old != NULL) { |
a3535c7e4 module: clean up ... |
2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 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 |
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); |
4982223e5 module: set nx be... |
3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 |
/* 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); |
a3535c7e4 module: clean up ... |
3034 3035 3036 |
/* Mark state as coming so strong_try_module_get() ignores us, * but kallsyms etc. can see us. */ mod->state = MODULE_STATE_COMING; |
4982223e5 module: set nx be... |
3037 3038 3039 3040 3041 |
mutex_unlock(&module_mutex); blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_COMING, mod); return 0; |
a3535c7e4 module: clean up ... |
3042 3043 3044 3045 3046 |
out: mutex_unlock(&module_mutex); return err; } |
54041d8a7 modules: don't fa... |
3047 3048 3049 3050 |
static int unknown_module_param_cb(char *param, char *val, const char *modname) { /* Check for magic 'dyndbg' arg */ int ret = ddebug_dyndbg_module_param_cb(param, val, modname); |
bddb12b32 kernel/module.c: ... |
3051 3052 3053 |
if (ret != 0) pr_warn("%s: unknown parameter '%s' ignored ", modname, param); |
54041d8a7 modules: don't fa... |
3054 3055 |
return 0; } |
d913188c7 module: layout_an... |
3056 3057 |
/* 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... |
3058 3059 |
static int load_module(struct load_info *info, const char __user *uargs, int flags) |
d913188c7 module: layout_an... |
3060 |
{ |
a3535c7e4 module: clean up ... |
3061 |
struct module *mod; |
d913188c7 module: layout_an... |
3062 |
long err; |
51e158c12 param: hand argum... |
3063 |
char *after_dashes; |
d913188c7 module: layout_an... |
3064 |
|
34e1169d9 module: add sysca... |
3065 3066 3067 |
err = module_sig_check(info); if (err) goto free_copy; |
d913188c7 module: layout_an... |
3068 |
|
34e1169d9 module: add sysca... |
3069 |
err = elf_header_check(info); |
d913188c7 module: layout_an... |
3070 |
if (err) |
34e1169d9 module: add sysca... |
3071 |
goto free_copy; |
d913188c7 module: layout_an... |
3072 3073 |
/* Figure out module layout, and allocate all the memory. */ |
2f3238aeb module: add flags... |
3074 |
mod = layout_and_allocate(info, flags); |
65b8a9b4d module: refactor ... |
3075 3076 |
if (IS_ERR(mod)) { err = PTR_ERR(mod); |
d913188c7 module: layout_an... |
3077 |
goto free_copy; |
1da177e4c Linux-2.6.12-rc2 |
3078 |
} |
1da177e4c Linux-2.6.12-rc2 |
3079 |
|
a3535c7e4 module: clean up ... |
3080 3081 3082 |
/* Reserve our place in the list. */ err = add_unformed_module(mod); if (err) |
1fb9341ac module: put modul... |
3083 |
goto free_module; |
1fb9341ac module: put modul... |
3084 |
|
106a4ee25 module: signature... |
3085 |
#ifdef CONFIG_MODULE_SIG |
34e1169d9 module: add sysca... |
3086 |
mod->sig_ok = info->sig_ok; |
64748a2c9 module: printk me... |
3087 |
if (!mod->sig_ok) { |
bddb12b32 kernel/module.c: ... |
3088 3089 3090 3091 |
pr_notice_once("%s: module verification failed: signature " "and/or required key missing - tainting " "kernel ", mod->name); |
66cc69e34 Fix: module signa... |
3092 |
add_taint_module(mod, TAINT_UNSIGNED_MODULE, LOCKDEP_STILL_OK); |
64748a2c9 module: printk me... |
3093 |
} |
106a4ee25 module: signature... |
3094 |
#endif |
8d8022e8a module: do percpu... |
3095 |
/* To avoid stressing percpu allocator, do this once we're unique. */ |
9eb76d779 module: cleanup c... |
3096 |
err = percpu_modalloc(mod, info); |
8d8022e8a module: do percpu... |
3097 3098 |
if (err) goto unlink_mod; |
49668688d module: pass load... |
3099 |
/* Now module is in final location, initialize linked lists, etc. */ |
9f85a4bbb module: refactor ... |
3100 3101 |
err = module_unload_init(mod); if (err) |
1fb9341ac module: put modul... |
3102 |
goto unlink_mod; |
1da177e4c Linux-2.6.12-rc2 |
3103 |
|
22e268ebe module: refactor ... |
3104 3105 |
/* Now we've got everything in the final locations, we can * find optional sections. */ |
eb3057df7 kernel: add suppo... |
3106 3107 3108 |
err = find_module_sections(mod, info); if (err) goto free_unload; |
9b37ccfc6 module: allow ndi... |
3109 |
|
49668688d module: pass load... |
3110 |
err = check_module_license_and_versions(mod); |
22e268ebe module: refactor ... |
3111 3112 |
if (err) goto free_unload; |
9841d61d7 [PATCH] Add taint... |
3113 |
|
c988d2b28 [PATCH] modules: ... |
3114 |
/* Set up MODINFO_ATTR fields */ |
34e1169d9 module: add sysca... |
3115 |
setup_modinfo(mod, info); |
c988d2b28 [PATCH] modules: ... |
3116 |
|
1da177e4c Linux-2.6.12-rc2 |
3117 |
/* Fix up syms, so that st_value is a pointer to location. */ |
34e1169d9 module: add sysca... |
3118 |
err = simplify_symbols(mod, info); |
1da177e4c Linux-2.6.12-rc2 |
3119 |
if (err < 0) |
d913188c7 module: layout_an... |
3120 |
goto free_modinfo; |
1da177e4c Linux-2.6.12-rc2 |
3121 |
|
34e1169d9 module: add sysca... |
3122 |
err = apply_relocations(mod, info); |
22e268ebe module: refactor ... |
3123 |
if (err < 0) |
d913188c7 module: layout_an... |
3124 |
goto free_modinfo; |
1da177e4c Linux-2.6.12-rc2 |
3125 |
|
34e1169d9 module: add sysca... |
3126 |
err = post_relocation(mod, info); |
1da177e4c Linux-2.6.12-rc2 |
3127 |
if (err < 0) |
d913188c7 module: layout_an... |
3128 |
goto free_modinfo; |
1da177e4c Linux-2.6.12-rc2 |
3129 |
|
22e268ebe module: refactor ... |
3130 |
flush_module_icache(mod); |
378bac820 [PATCH] flush ica... |
3131 |
|
6526c534b module: move modu... |
3132 3133 3134 3135 3136 3137 |
/* 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... |
3138 |
|
34e1169d9 module: add sysca... |
3139 |
dynamic_debug_setup(info->debug, info->num_debug); |
ff49d74ad module: initializ... |
3140 |
|
a949ae560 ftrace/module: Ha... |
3141 3142 |
/* Ftrace init must be called in the MODULE_STATE_UNFORMED state */ ftrace_module_init(mod); |
a3535c7e4 module: clean up ... |
3143 3144 3145 |
/* Finally it's fully formed, ready to start executing. */ err = complete_formation(mod, info); if (err) |
1fb9341ac module: put modul... |
3146 |
goto ddebug_cleanup; |
be593f4ce module: verify_ex... |
3147 |
|
51f3d0f47 module: cleanup c... |
3148 |
/* Module is ready to execute: parsing args may do that. */ |
51e158c12 param: hand argum... |
3149 3150 3151 3152 |
after_dashes = parse_args(mod->name, mod->args, mod->kp, mod->num_kp, -32768, 32767, unknown_module_param_cb); if (IS_ERR(after_dashes)) { err = PTR_ERR(after_dashes); |
1fb9341ac module: put modul... |
3153 |
goto bug_cleanup; |
51e158c12 param: hand argum... |
3154 3155 3156 3157 3158 |
} else if (after_dashes) { pr_warn("%s: parameters '%s' after `--' ignored ", mod->name, after_dashes); } |
1da177e4c Linux-2.6.12-rc2 |
3159 |
|
51f3d0f47 module: cleanup c... |
3160 |
/* Link in to syfs. */ |
34e1169d9 module: add sysca... |
3161 |
err = mod_sysfs_setup(mod, info, mod->kp, mod->num_kp); |
1da177e4c Linux-2.6.12-rc2 |
3162 |
if (err < 0) |
1fb9341ac module: put modul... |
3163 |
goto bug_cleanup; |
80a3d1bb4 module: move sysf... |
3164 |
|
48fd11880 module: Fix perfo... |
3165 |
/* Get rid of temporary copy. */ |
34e1169d9 module: add sysca... |
3166 |
free_copy(info); |
1da177e4c Linux-2.6.12-rc2 |
3167 3168 |
/* Done! */ |
51f3d0f47 module: cleanup c... |
3169 |
trace_module_load(mod); |
34e1169d9 module: add sysca... |
3170 3171 |
return do_init_module(mod); |
1da177e4c Linux-2.6.12-rc2 |
3172 |
|
1fb9341ac module: put modul... |
3173 3174 |
bug_cleanup: /* module_bug_cleanup needs module_mutex protection */ |
75676500f module: make lock... |
3175 |
mutex_lock(&module_mutex); |
5336377d6 modules: Fix modu... |
3176 |
module_bug_cleanup(mod); |
ee61abb32 module: fix missi... |
3177 |
mutex_unlock(&module_mutex); |
ff7e0055b module: Clean up ... |
3178 3179 3180 3181 |
/* we can't deallocate the module until we clear memory protection */ unset_module_init_ro_nx(mod); unset_module_core_ro_nx(mod); |
a3535c7e4 module: clean up ... |
3182 |
ddebug_cleanup: |
1fb9341ac module: put modul... |
3183 |
dynamic_debug_remove(info->debug); |
e91defa26 module: don't use... |
3184 |
synchronize_sched(); |
6526c534b module: move modu... |
3185 3186 |
kfree(mod->args); free_arch_cleanup: |
1da177e4c Linux-2.6.12-rc2 |
3187 |
module_arch_cleanup(mod); |
d913188c7 module: layout_an... |
3188 |
free_modinfo: |
a263f7763 module: fix memor... |
3189 |
free_modinfo(mod); |
22e268ebe module: refactor ... |
3190 |
free_unload: |
1da177e4c Linux-2.6.12-rc2 |
3191 |
module_unload_free(mod); |
1fb9341ac module: put modul... |
3192 3193 3194 3195 3196 3197 |
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... |
3198 |
free_module: |
34e1169d9 module: add sysca... |
3199 |
module_deallocate(mod, info); |
d913188c7 module: layout_an... |
3200 |
free_copy: |
34e1169d9 module: add sysca... |
3201 3202 |
free_copy(info); return err; |
b99b87f70 kernel: construct... |
3203 |
} |
17da2bd90 [CVE-2009-0029] S... |
3204 3205 |
SYSCALL_DEFINE3(init_module, void __user *, umod, unsigned long, len, const char __user *, uargs) |
1da177e4c Linux-2.6.12-rc2 |
3206 |
{ |
34e1169d9 module: add sysca... |
3207 3208 |
int err; struct load_info info = { }; |
1da177e4c Linux-2.6.12-rc2 |
3209 |
|
34e1169d9 module: add sysca... |
3210 3211 3212 |
err = may_init_module(); if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
3213 |
|
34e1169d9 module: add sysca... |
3214 3215 3216 |
pr_debug("init_module: umod=%p, len=%lu, uargs=%p ", umod, len, uargs); |
1da177e4c Linux-2.6.12-rc2 |
3217 |
|
34e1169d9 module: add sysca... |
3218 3219 3220 |
err = copy_module_from_user(umod, len, &info); if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
3221 |
|
2f3238aeb module: add flags... |
3222 |
return load_module(&info, uargs, 0); |
34e1169d9 module: add sysca... |
3223 |
} |
94462ad3b module: Move RO/N... |
3224 |
|
2f3238aeb module: add flags... |
3225 |
SYSCALL_DEFINE3(finit_module, int, fd, const char __user *, uargs, int, flags) |
34e1169d9 module: add sysca... |
3226 3227 3228 |
{ int err; struct load_info info = { }; |
94462ad3b module: Move RO/N... |
3229 |
|
34e1169d9 module: add sysca... |
3230 3231 3232 |
err = may_init_module(); if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
3233 |
|
2f3238aeb module: add flags... |
3234 3235 |
pr_debug("finit_module: fd=%d, uargs=%p, flags=%i ", fd, uargs, flags); |
6c5db22d2 modules: fix modu... |
3236 |
|
2f3238aeb module: add flags... |
3237 3238 3239 |
if (flags & ~(MODULE_INIT_IGNORE_MODVERSIONS |MODULE_INIT_IGNORE_VERMAGIC)) return -EINVAL; |
d6de2c80e async: Fix module... |
3240 |
|
34e1169d9 module: add sysca... |
3241 3242 3243 |
err = copy_module_from_fd(fd, &info); if (err) return err; |
1da177e4c Linux-2.6.12-rc2 |
3244 |
|
2f3238aeb module: add flags... |
3245 |
return load_module(&info, uargs, flags); |
1da177e4c Linux-2.6.12-rc2 |
3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 |
} 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) { |
2e3a10a15 ARM: avoid ARM bi... |
3260 3261 |
if (str[0] == '.' && str[1] == 'L') return true; |
6c34f1f54 aarch64: filter $... |
3262 |
return str[0] == '$' && strchr("axtd", str[1]) |
1da177e4c Linux-2.6.12-rc2 |
3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 |
&& (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... |
3275 |
if (within_module_init(addr, mod)) |
1da177e4c Linux-2.6.12-rc2 |
3276 |
nextval = (unsigned long)mod->module_init+mod->init_text_size; |
22a8bdeb5 whitespace fixes:... |
3277 |
else |
1da177e4c Linux-2.6.12-rc2 |
3278 |
nextval = (unsigned long)mod->module_core+mod->core_text_size; |
25985edce Fix common misspe... |
3279 |
/* Scan for closest preceding symbol, and next symbol. (ELF |
22a8bdeb5 whitespace fixes:... |
3280 |
starts real symbols at 1). */ |
1da177e4c Linux-2.6.12-rc2 |
3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 |
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... |
3301 3302 3303 3304 |
if (size) *size = nextval - mod->symtab[best].st_value; if (offset) *offset = addr - mod->symtab[best].st_value; |
1da177e4c Linux-2.6.12-rc2 |
3305 3306 |
return mod->strtab + mod->symtab[best].st_name; } |
6dd06c9fb module: make modu... |
3307 3308 |
/* 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... |
3309 |
const char *module_address_lookup(unsigned long addr, |
6dd06c9fb module: make modu... |
3310 3311 3312 3313 |
unsigned long *size, unsigned long *offset, char **modname, char *namebuf) |
1da177e4c Linux-2.6.12-rc2 |
3314 3315 |
{ struct module *mod; |
cb2a52052 modules: de-mutex... |
3316 |
const char *ret = NULL; |
1da177e4c Linux-2.6.12-rc2 |
3317 |
|
cb2a52052 modules: de-mutex... |
3318 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3319 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3320 3321 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
9b20a352d module: add withi... |
3322 |
if (within_module(addr, mod)) { |
ffc508919 [PATCH] Create ka... |
3323 3324 |
if (modname) *modname = mod->name; |
cb2a52052 modules: de-mutex... |
3325 3326 |
ret = get_ksymbol(mod, addr, size, offset); break; |
1da177e4c Linux-2.6.12-rc2 |
3327 3328 |
} } |
6dd06c9fb module: make modu... |
3329 3330 3331 3332 3333 |
/* Make a copy in here where it's safe */ if (ret) { strncpy(namebuf, ret, KSYM_NAME_LEN - 1); ret = namebuf; } |
cb2a52052 modules: de-mutex... |
3334 |
preempt_enable(); |
92dfc9dc7 fix "modules: mak... |
3335 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
3336 |
} |
9d65cb4a1 Fix race between ... |
3337 3338 3339 |
int lookup_module_symbol_name(unsigned long addr, char *symname) { struct module *mod; |
cb2a52052 modules: de-mutex... |
3340 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3341 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3342 3343 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
9b20a352d module: add withi... |
3344 |
if (within_module(addr, mod)) { |
9d65cb4a1 Fix race between ... |
3345 3346 3347 3348 3349 |
const char *sym; sym = get_ksymbol(mod, addr, NULL, NULL); if (!sym) goto out; |
9281acea6 kallsyms: make KS... |
3350 |
strlcpy(symname, sym, KSYM_NAME_LEN); |
cb2a52052 modules: de-mutex... |
3351 |
preempt_enable(); |
9d65cb4a1 Fix race between ... |
3352 3353 3354 3355 |
return 0; } } out: |
cb2a52052 modules: de-mutex... |
3356 |
preempt_enable(); |
9d65cb4a1 Fix race between ... |
3357 3358 |
return -ERANGE; } |
a5c43dae7 Fix race between ... |
3359 3360 3361 3362 |
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... |
3363 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3364 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3365 3366 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
9b20a352d module: add withi... |
3367 |
if (within_module(addr, mod)) { |
a5c43dae7 Fix race between ... |
3368 3369 3370 3371 3372 3373 |
const char *sym; sym = get_ksymbol(mod, addr, size, offset); if (!sym) goto out; if (modname) |
9281acea6 kallsyms: make KS... |
3374 |
strlcpy(modname, mod->name, MODULE_NAME_LEN); |
a5c43dae7 Fix race between ... |
3375 |
if (name) |
9281acea6 kallsyms: make KS... |
3376 |
strlcpy(name, sym, KSYM_NAME_LEN); |
cb2a52052 modules: de-mutex... |
3377 |
preempt_enable(); |
a5c43dae7 Fix race between ... |
3378 3379 3380 3381 |
return 0; } } out: |
cb2a52052 modules: de-mutex... |
3382 |
preempt_enable(); |
a5c43dae7 Fix race between ... |
3383 3384 |
return -ERANGE; } |
ea07890a6 Fix race between ... |
3385 3386 |
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 |
3387 3388 |
{ struct module *mod; |
cb2a52052 modules: de-mutex... |
3389 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3390 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3391 3392 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
1da177e4c Linux-2.6.12-rc2 |
3393 3394 3395 |
if (symnum < mod->num_symtab) { *value = mod->symtab[symnum].st_value; *type = mod->symtab[symnum].st_info; |
098c5eea0 [PATCH] null-term... |
3396 |
strlcpy(name, mod->strtab + mod->symtab[symnum].st_name, |
9281acea6 kallsyms: make KS... |
3397 3398 |
KSYM_NAME_LEN); strlcpy(module_name, mod->name, MODULE_NAME_LEN); |
ca4787b77 kernel/module.c: ... |
3399 |
*exported = is_exported(name, *value, mod); |
cb2a52052 modules: de-mutex... |
3400 |
preempt_enable(); |
ea07890a6 Fix race between ... |
3401 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
3402 3403 3404 |
} symnum -= mod->num_symtab; } |
cb2a52052 modules: de-mutex... |
3405 |
preempt_enable(); |
ea07890a6 Fix race between ... |
3406 |
return -ERANGE; |
1da177e4c Linux-2.6.12-rc2 |
3407 3408 3409 3410 3411 3412 3413 |
} 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... |
3414 3415 |
if (strcmp(name, mod->strtab+mod->symtab[i].st_name) == 0 && mod->symtab[i].st_info != 'U') |
1da177e4c Linux-2.6.12-rc2 |
3416 3417 3418 3419 3420 3421 3422 3423 3424 3425 3426 3427 |
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... |
3428 |
preempt_disable(); |
1da177e4c Linux-2.6.12-rc2 |
3429 |
if ((colon = strchr(name, ':')) != NULL) { |
4f6de4d51 module: don't mod... |
3430 |
if ((mod = find_module_all(name, colon - name, false)) != NULL) |
1da177e4c Linux-2.6.12-rc2 |
3431 |
ret = mod_find_symname(mod, colon+1); |
1da177e4c Linux-2.6.12-rc2 |
3432 |
} else { |
0d21b0e34 module: add new s... |
3433 3434 3435 |
list_for_each_entry_rcu(mod, &modules, list) { if (mod->state == MODULE_STATE_UNFORMED) continue; |
1da177e4c Linux-2.6.12-rc2 |
3436 3437 |
if ((ret = mod_find_symname(mod, name)) != 0) break; |
0d21b0e34 module: add new s... |
3438 |
} |
1da177e4c Linux-2.6.12-rc2 |
3439 |
} |
cb2a52052 modules: de-mutex... |
3440 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
3441 3442 |
return ret; } |
75a66614d Ksplice: Add func... |
3443 3444 3445 3446 3447 3448 3449 3450 3451 3452 |
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... |
3453 3454 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
75a66614d Ksplice: Add func... |
3455 3456 3457 3458 3459 3460 3461 3462 3463 |
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 |
3464 |
#endif /* CONFIG_KALLSYMS */ |
21aa9280b debug: show being... |
3465 |
static char *module_flags(struct module *mod, char *buf) |
fa3ba2e81 [PATCH] fix Modul... |
3466 3467 |
{ int bx = 0; |
0d21b0e34 module: add new s... |
3468 |
BUG_ON(mod->state == MODULE_STATE_UNFORMED); |
21aa9280b debug: show being... |
3469 3470 3471 |
if (mod->taints || mod->state == MODULE_STATE_GOING || mod->state == MODULE_STATE_COMING) { |
fa3ba2e81 [PATCH] fix Modul... |
3472 |
buf[bx++] = '('; |
cca3e7073 modules: sysfs - ... |
3473 |
bx += module_flags_taint(mod, buf + bx); |
21aa9280b debug: show being... |
3474 3475 3476 3477 3478 3479 |
/* 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... |
3480 3481 3482 3483 3484 3485 |
buf[bx++] = ')'; } buf[bx] = '\0'; return buf; } |
3b5d5c6b0 proc: move /proc/... |
3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 |
#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 |
3503 3504 3505 |
static int m_show(struct seq_file *m, void *p) { struct module *mod = list_entry(p, struct module, list); |
fa3ba2e81 [PATCH] fix Modul... |
3506 |
char buf[8]; |
0d21b0e34 module: add new s... |
3507 3508 3509 |
/* We always ignore unformed modules. */ if (mod->state == MODULE_STATE_UNFORMED) return 0; |
2f0f2a334 module: turn long... |
3510 |
seq_printf(m, "%s %u", |
1da177e4c Linux-2.6.12-rc2 |
3511 3512 3513 3514 3515 3516 3517 3518 3519 |
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... |
3520 |
seq_printf(m, " 0x%pK", mod->module_core); |
1da177e4c Linux-2.6.12-rc2 |
3521 |
|
fa3ba2e81 [PATCH] fix Modul... |
3522 3523 |
/* Taints info */ if (mod->taints) |
21aa9280b debug: show being... |
3524 |
seq_printf(m, " %s", module_flags(mod, buf)); |
fa3ba2e81 [PATCH] fix Modul... |
3525 |
|
1da177e4c Linux-2.6.12-rc2 |
3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 |
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/... |
3536 |
static const struct seq_operations modules_op = { |
1da177e4c Linux-2.6.12-rc2 |
3537 3538 3539 3540 3541 |
.start = m_start, .next = m_next, .stop = m_stop, .show = m_show }; |
3b5d5c6b0 proc: move /proc/... |
3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 |
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 |
3561 3562 3563 |
/* 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 |
3564 3565 |
const struct exception_table_entry *e = NULL; struct module *mod; |
24da1cbff modules: remove m... |
3566 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3567 |
list_for_each_entry_rcu(mod, &modules, list) { |
0d21b0e34 module: add new s... |
3568 3569 |
if (mod->state == MODULE_STATE_UNFORMED) continue; |
1da177e4c Linux-2.6.12-rc2 |
3570 3571 |
if (mod->num_exentries == 0) continue; |
22a8bdeb5 whitespace fixes:... |
3572 |
|
1da177e4c Linux-2.6.12-rc2 |
3573 3574 3575 3576 3577 3578 |
e = search_extable(mod->extable, mod->extable + mod->num_exentries - 1, addr); if (e) break; } |
24da1cbff modules: remove m... |
3579 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
3580 3581 |
/* Now, if we found one, we are running inside it now, hence |
22a8bdeb5 whitespace fixes:... |
3582 |
we cannot unload the module, hence no refcnt needed. */ |
1da177e4c Linux-2.6.12-rc2 |
3583 3584 |
return e; } |
4d435f9d8 [PATCH] lockdep: ... |
3585 |
/* |
e610499e2 module: __module_... |
3586 3587 3588 3589 3590 |
* 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: ... |
3591 |
*/ |
e610499e2 module: __module_... |
3592 |
bool is_module_address(unsigned long addr) |
4d435f9d8 [PATCH] lockdep: ... |
3593 |
{ |
e610499e2 module: __module_... |
3594 |
bool ret; |
4d435f9d8 [PATCH] lockdep: ... |
3595 |
|
24da1cbff modules: remove m... |
3596 |
preempt_disable(); |
e610499e2 module: __module_... |
3597 |
ret = __module_address(addr) != NULL; |
24da1cbff modules: remove m... |
3598 |
preempt_enable(); |
4d435f9d8 [PATCH] lockdep: ... |
3599 |
|
e610499e2 module: __module_... |
3600 |
return ret; |
4d435f9d8 [PATCH] lockdep: ... |
3601 |
} |
e610499e2 module: __module_... |
3602 3603 3604 3605 3606 3607 3608 |
/* * __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... |
3609 |
struct module *__module_address(unsigned long addr) |
1da177e4c Linux-2.6.12-rc2 |
3610 3611 |
{ struct module *mod; |
3a642e99b modules: Take a s... |
3612 3613 |
if (addr < module_addr_min || addr > module_addr_max) return NULL; |
0d21b0e34 module: add new s... |
3614 3615 3616 |
list_for_each_entry_rcu(mod, &modules, list) { if (mod->state == MODULE_STATE_UNFORMED) continue; |
9b20a352d module: add withi... |
3617 |
if (within_module(addr, mod)) |
1da177e4c Linux-2.6.12-rc2 |
3618 |
return mod; |
0d21b0e34 module: add new s... |
3619 |
} |
1da177e4c Linux-2.6.12-rc2 |
3620 3621 |
return NULL; } |
c6b378019 module: Export sy... |
3622 |
EXPORT_SYMBOL_GPL(__module_address); |
1da177e4c Linux-2.6.12-rc2 |
3623 |
|
e610499e2 module: __module_... |
3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 |
/* * 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... |
3661 |
EXPORT_SYMBOL_GPL(__module_text_address); |
e610499e2 module: __module_... |
3662 |
|
1da177e4c Linux-2.6.12-rc2 |
3663 3664 3665 3666 |
/* Don't grab lock, we're oopsing. */ void print_modules(void) { struct module *mod; |
2bc2d61a9 [PATCH] list modu... |
3667 |
char buf[8]; |
1da177e4c Linux-2.6.12-rc2 |
3668 |
|
b231125af printk: add KERN_... |
3669 |
printk(KERN_DEFAULT "Modules linked in:"); |
d72b37513 Remove stop_machi... |
3670 3671 |
/* Most callers should already have preempt disabled, but make sure */ preempt_disable(); |
0d21b0e34 module: add new s... |
3672 3673 3674 |
list_for_each_entry_rcu(mod, &modules, list) { if (mod->state == MODULE_STATE_UNFORMED) continue; |
27bba4d6b module: use pr_cont |
3675 |
pr_cont(" %s%s", mod->name, module_flags(mod, buf)); |
0d21b0e34 module: add new s... |
3676 |
} |
d72b37513 Remove stop_machi... |
3677 |
preempt_enable(); |
e14af7eeb debug: track and ... |
3678 |
if (last_unloaded_module[0]) |
27bba4d6b module: use pr_cont |
3679 3680 3681 |
pr_cont(" [last unloaded: %s]", last_unloaded_module); pr_cont(" "); |
1da177e4c Linux-2.6.12-rc2 |
3682 |
} |
1da177e4c Linux-2.6.12-rc2 |
3683 |
#ifdef CONFIG_MODVERSIONS |
8c8ef42ae module: include o... |
3684 3685 3686 3687 3688 3689 |
/* 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 ... |
3690 |
struct tracepoint * const *tp) |
8c8ef42ae module: include o... |
3691 3692 3693 |
{ } EXPORT_SYMBOL(module_layout); |
1da177e4c Linux-2.6.12-rc2 |
3694 |
#endif |