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kernel/module.c
88.5 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/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/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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|
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#define CREATE_TRACE_POINTS #include <trace/events/module.h> |
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#if 0 #define DEBUGP printk #else #define DEBUGP(fmt , a...) #endif #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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/* Block module loading/unloading? */ int modules_disabled = 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 *strmap; unsigned long symoffs, stroffs; |
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struct _ddebug *debug; unsigned int num_debug; |
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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) { 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) { add_taint(flag); |
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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 (each_symbol_in_section(arr, ARRAY_SIZE(arr), mod, fn, data)) return true; } return false; } |
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EXPORT_SYMBOL_GPL(each_symbol_section); |
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struct find_symbol_arg { /* Input */ const char *name; bool gplok; bool warn; /* Output */ struct module *owner; const unsigned long *crc; |
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const struct kernel_symbol *sym; |
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}; |
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static bool check_symbol(const struct symsearch *syms, struct module *owner, unsigned int symnum, void *data) |
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{ struct find_symbol_arg *fsa = data; |
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if (!fsa->gplok) { if (syms->licence == GPL_ONLY) return false; if (syms->licence == WILL_BE_GPL_ONLY && fsa->warn) { printk(KERN_WARNING "Symbol %s is being used " "by a non-GPL module, which will not " "be allowed in the future ", fsa->name); printk(KERN_WARNING "Please see the file " "Documentation/feature-removal-schedule.txt " "in the kernel source tree for more details. "); |
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} |
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} |
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#ifdef CONFIG_UNUSED_SYMBOLS |
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if (syms->unused && fsa->warn) { printk(KERN_WARNING "Symbol %s is marked as UNUSED, " "however this module is using it. ", fsa->name); printk(KERN_WARNING "This symbol will go away in the future. "); printk(KERN_WARNING "Please evalute if this is the right api to use and if " "it really is, submit a report the linux kernel " "mailinglist together with submitting your code for " "inclusion. "); } |
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#endif |
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fsa->owner = owner; fsa->crc = symversion(syms->crcs, symnum); |
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fsa->sym = &syms->start[symnum]; |
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return true; } |
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static int cmp_name(const void *va, const void *vb) { const char *a; const struct kernel_symbol *b; a = va; b = vb; return strcmp(a, b->name); } |
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static bool find_symbol_in_section(const struct symsearch *syms, struct module *owner, void *data) { struct find_symbol_arg *fsa = data; |
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struct kernel_symbol *sym; sym = bsearch(fsa->name, syms->start, syms->stop - syms->start, sizeof(struct kernel_symbol), cmp_name); if (sym != NULL && check_symbol(syms, owner, sym - syms->start, data)) return true; |
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|
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return false; } |
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/* Find a symbol and return it, along with, (optional) crc and |
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* (optional) module which owns it. Needs preempt disabled or module_mutex. */ |
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const struct kernel_symbol *find_symbol(const char *name, struct module **owner, const unsigned long **crc, bool gplok, bool warn) |
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{ struct find_symbol_arg fsa; fsa.name = name; fsa.gplok = gplok; fsa.warn = warn; |
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if (each_symbol_section(find_symbol_in_section, &fsa)) { |
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if (owner) *owner = fsa.owner; if (crc) *crc = fsa.crc; |
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return fsa.sym; |
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} |
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DEBUGP("Failed to find symbol %s ", name); |
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return NULL; |
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} |
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EXPORT_SYMBOL_GPL(find_symbol); |
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|
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/* Search for module by name: must hold module_mutex. */ |
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struct module *find_module(const char *name) |
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{ struct module *mod; list_for_each_entry(mod, &modules, list) { if (strcmp(mod->name, name) == 0) return mod; } return NULL; } |
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EXPORT_SYMBOL_GPL(find_module); |
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#ifdef CONFIG_SMP |
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|
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static inline void __percpu *mod_percpu(struct module *mod) |
fbf59bc9d percpu: implement... |
415 |
{ |
259354dea module: encapsula... |
416 417 |
return mod->percpu; } |
fbf59bc9d percpu: implement... |
418 |
|
259354dea module: encapsula... |
419 420 421 |
static int percpu_modalloc(struct module *mod, unsigned long size, unsigned long align) { |
fbf59bc9d percpu: implement... |
422 423 424 |
if (align > PAGE_SIZE) { printk(KERN_WARNING "%s: per-cpu alignment %li > %li ", |
259354dea module: encapsula... |
425 |
mod->name, align, PAGE_SIZE); |
fbf59bc9d percpu: implement... |
426 427 |
align = PAGE_SIZE; } |
259354dea module: encapsula... |
428 429 |
mod->percpu = __alloc_reserved_percpu(size, align); if (!mod->percpu) { |
fbf59bc9d percpu: implement... |
430 |
printk(KERN_WARNING |
d913188c7 module: layout_an... |
431 432 433 |
"%s: Could not allocate %lu bytes percpu data ", mod->name, size); |
259354dea module: encapsula... |
434 435 436 437 |
return -ENOMEM; } mod->percpu_size = size; return 0; |
fbf59bc9d percpu: implement... |
438 |
} |
259354dea module: encapsula... |
439 |
static void percpu_modfree(struct module *mod) |
fbf59bc9d percpu: implement... |
440 |
{ |
259354dea module: encapsula... |
441 |
free_percpu(mod->percpu); |
fbf59bc9d percpu: implement... |
442 |
} |
49668688d module: pass load... |
443 |
static unsigned int find_pcpusec(struct load_info *info) |
6b588c18f module: reorder m... |
444 |
{ |
49668688d module: pass load... |
445 |
return find_sec(info, ".data..percpu"); |
6b588c18f module: reorder m... |
446 |
} |
259354dea module: encapsula... |
447 448 |
static void percpu_modcopy(struct module *mod, const void *from, unsigned long size) |
6b588c18f module: reorder m... |
449 450 451 452 |
{ int cpu; for_each_possible_cpu(cpu) |
259354dea module: encapsula... |
453 |
memcpy(per_cpu_ptr(mod->percpu, cpu), from, size); |
6b588c18f module: reorder m... |
454 |
} |
10fad5e46 percpu, module: i... |
455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 |
/** * 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) { 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... |
487 |
} |
1da177e4c Linux-2.6.12-rc2 |
488 |
#else /* ... !CONFIG_SMP */ |
6b588c18f module: reorder m... |
489 |
|
259354dea module: encapsula... |
490 |
static inline void __percpu *mod_percpu(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
491 492 493 |
{ return NULL; } |
259354dea module: encapsula... |
494 495 496 497 498 499 |
static inline int percpu_modalloc(struct module *mod, unsigned long size, unsigned long align) { return -ENOMEM; } static inline void percpu_modfree(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
500 |
{ |
1da177e4c Linux-2.6.12-rc2 |
501 |
} |
49668688d module: pass load... |
502 |
static unsigned int find_pcpusec(struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
503 504 505 |
{ return 0; } |
259354dea module: encapsula... |
506 507 |
static inline void percpu_modcopy(struct module *mod, const void *from, unsigned long size) |
1da177e4c Linux-2.6.12-rc2 |
508 509 510 511 |
{ /* pcpusec should be 0, and size of that section should be 0. */ BUG_ON(size != 0); } |
10fad5e46 percpu, module: i... |
512 513 514 515 |
bool is_module_percpu_address(unsigned long addr) { return false; } |
6b588c18f module: reorder m... |
516 |
|
1da177e4c Linux-2.6.12-rc2 |
517 |
#endif /* CONFIG_SMP */ |
c988d2b28 [PATCH] modules: ... |
518 519 520 521 522 523 |
#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... |
524 |
struct module_kobject *mk, char *buffer) \ |
c988d2b28 [PATCH] modules: ... |
525 |
{ \ |
4befb026c module: change at... |
526 527 |
return sprintf(buffer, "%s ", mk->mod->field); \ |
c988d2b28 [PATCH] modules: ... |
528 529 530 531 532 533 534 |
} \ static int modinfo_##field##_exists(struct module *mod) \ { \ return mod->field != NULL; \ } \ static void free_modinfo_##field(struct module *mod) \ { \ |
22a8bdeb5 whitespace fixes:... |
535 536 |
kfree(mod->field); \ mod->field = NULL; \ |
c988d2b28 [PATCH] modules: ... |
537 538 |
} \ static struct module_attribute modinfo_##field = { \ |
7b595756e sysfs: kill unnec... |
539 |
.attr = { .name = __stringify(field), .mode = 0444 }, \ |
c988d2b28 [PATCH] modules: ... |
540 541 542 543 544 545 546 547 |
.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 ... |
548 |
static char last_unloaded_module[MODULE_NAME_LEN+1]; |
03e88ae1b [PATCH] fix modul... |
549 |
#ifdef CONFIG_MODULE_UNLOAD |
eb0c53771 tracing: Fix comp... |
550 551 |
EXPORT_TRACEPOINT_SYMBOL(module_get); |
1da177e4c Linux-2.6.12-rc2 |
552 |
/* Init the unload section of the module. */ |
9f85a4bbb module: refactor ... |
553 |
static int module_unload_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
554 |
{ |
9f85a4bbb module: refactor ... |
555 556 557 |
mod->refptr = alloc_percpu(struct module_ref); if (!mod->refptr) return -ENOMEM; |
2c02dfe7f module: Make the ... |
558 559 |
INIT_LIST_HEAD(&mod->source_list); INIT_LIST_HEAD(&mod->target_list); |
e1783a240 module: Use this_... |
560 |
|
1da177e4c Linux-2.6.12-rc2 |
561 |
/* Hold reference count during initialization. */ |
5fbfb18d7 Fix up possibly r... |
562 |
__this_cpu_write(mod->refptr->incs, 1); |
1da177e4c Linux-2.6.12-rc2 |
563 564 |
/* Backwards compatibility macros put refcount during init. */ mod->waiter = current; |
9f85a4bbb module: refactor ... |
565 566 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
567 |
} |
1da177e4c Linux-2.6.12-rc2 |
568 569 570 571 |
/* Does a already use b? */ static int already_uses(struct module *a, struct module *b) { struct module_use *use; |
2c02dfe7f module: Make the ... |
572 573 |
list_for_each_entry(use, &b->source_list, source_list) { if (use->source == a) { |
1da177e4c Linux-2.6.12-rc2 |
574 575 576 577 578 579 580 581 582 |
DEBUGP("%s uses %s! ", a->name, b->name); return 1; } } DEBUGP("%s does not use %s! ", a->name, b->name); return 0; } |
2c02dfe7f module: Make the ... |
583 584 585 586 587 588 589 590 591 |
/* * 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 ... |
592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 |
struct module_use *use; DEBUGP("Allocating new usage for %s. ", a->name); use = kmalloc(sizeof(*use), GFP_ATOMIC); if (!use) { printk(KERN_WARNING "%s: out of memory loading ", a->name); return -ENOMEM; } use->source = a; use->target = b; list_add(&use->source_list, &b->source_list); list_add(&use->target_list, &a->target_list); |
2c02dfe7f module: Make the ... |
607 608 |
return 0; } |
75676500f module: make lock... |
609 |
/* Module a uses b: caller needs module_mutex() */ |
9bea7f239 module: fix bne2 ... |
610 |
int ref_module(struct module *a, struct module *b) |
1da177e4c Linux-2.6.12-rc2 |
611 |
{ |
c8e21ced0 module: fix kdb's... |
612 |
int err; |
270a6c4ca /sys/modules/*/ho... |
613 |
|
9bea7f239 module: fix bne2 ... |
614 |
if (b == NULL || already_uses(a, b)) |
218ce7351 Revert "module: d... |
615 |
return 0; |
218ce7351 Revert "module: d... |
616 |
|
9bea7f239 module: fix bne2 ... |
617 618 |
/* If module isn't available, we fail. */ err = strong_try_module_get(b); |
c9a3ba55b module: wait for ... |
619 |
if (err) |
9bea7f239 module: fix bne2 ... |
620 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
621 |
|
2c02dfe7f module: Make the ... |
622 623 |
err = add_module_usage(a, b); if (err) { |
1da177e4c Linux-2.6.12-rc2 |
624 |
module_put(b); |
9bea7f239 module: fix bne2 ... |
625 |
return err; |
1da177e4c Linux-2.6.12-rc2 |
626 |
} |
9bea7f239 module: fix bne2 ... |
627 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
628 |
} |
9bea7f239 module: fix bne2 ... |
629 |
EXPORT_SYMBOL_GPL(ref_module); |
1da177e4c Linux-2.6.12-rc2 |
630 631 632 633 |
/* Clear the unload stuff of the module. */ static void module_unload_free(struct module *mod) { |
2c02dfe7f module: Make the ... |
634 |
struct module_use *use, *tmp; |
1da177e4c Linux-2.6.12-rc2 |
635 |
|
75676500f module: make lock... |
636 |
mutex_lock(&module_mutex); |
2c02dfe7f module: Make the ... |
637 638 639 640 641 642 643 644 |
list_for_each_entry_safe(use, tmp, &mod->target_list, target_list) { struct module *i = use->target; DEBUGP("%s unusing %s ", mod->name, i->name); module_put(i); list_del(&use->source_list); list_del(&use->target_list); kfree(use); |
1da177e4c Linux-2.6.12-rc2 |
645 |
} |
75676500f module: make lock... |
646 |
mutex_unlock(&module_mutex); |
9f85a4bbb module: refactor ... |
647 648 |
free_percpu(mod->refptr); |
1da177e4c Linux-2.6.12-rc2 |
649 650 651 |
} #ifdef CONFIG_MODULE_FORCE_UNLOAD |
fb1697933 [PATCH] modules: ... |
652 |
static inline int try_force_unload(unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
653 654 655 |
{ int ret = (flags & O_TRUNC); if (ret) |
fb1697933 [PATCH] modules: ... |
656 |
add_taint(TAINT_FORCED_RMMOD); |
1da177e4c Linux-2.6.12-rc2 |
657 658 659 |
return ret; } #else |
fb1697933 [PATCH] modules: ... |
660 |
static inline int try_force_unload(unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 |
{ 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... |
677 678 |
/* If it's not unused, quit unless we're forcing. */ if (module_refcount(sref->mod) != 0) { |
fb1697933 [PATCH] modules: ... |
679 |
if (!(*sref->forced = try_force_unload(sref->flags))) |
1da177e4c Linux-2.6.12-rc2 |
680 681 682 683 684 685 686 687 688 689 |
return -EWOULDBLOCK; } /* Mark it as dying. */ sref->mod->state = MODULE_STATE_GOING; return 0; } static int try_stop_module(struct module *mod, int flags, int *forced) { |
da39ba5e1 module: don't use... |
690 691 |
if (flags & O_NONBLOCK) { struct stopref sref = { mod, flags, forced }; |
1da177e4c Linux-2.6.12-rc2 |
692 |
|
9b1a4d383 stop_machine: Wea... |
693 |
return stop_machine(__try_stop_module, &sref, NULL); |
da39ba5e1 module: don't use... |
694 695 696 697 698 699 |
} else { /* We don't need to stop the machine for this. */ mod->state = MODULE_STATE_GOING; synchronize_sched(); return 0; } |
1da177e4c Linux-2.6.12-rc2 |
700 701 702 703 |
} unsigned int module_refcount(struct module *mod) { |
5fbfb18d7 Fix up possibly r... |
704 |
unsigned int incs = 0, decs = 0; |
720eba31f modules: Use a be... |
705 |
int cpu; |
1da177e4c Linux-2.6.12-rc2 |
706 |
|
720eba31f modules: Use a be... |
707 |
for_each_possible_cpu(cpu) |
5fbfb18d7 Fix up possibly r... |
708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 |
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 |
726 727 728 729 730 731 732 733 |
} EXPORT_SYMBOL(module_refcount); /* This exists whether we can unload or not */ static void free_module(struct module *mod); static void wait_for_zero_refcount(struct module *mod) { |
a65502075 kernel: Remove un... |
734 |
/* Since we might sleep for some time, release the mutex first */ |
6389a3851 [PATCH] kernel/mo... |
735 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
736 737 738 739 740 741 742 743 744 |
for (;;) { DEBUGP("Looking at refcount... "); set_current_state(TASK_UNINTERRUPTIBLE); if (module_refcount(mod) == 0) break; schedule(); } current->state = TASK_RUNNING; |
6389a3851 [PATCH] kernel/mo... |
745 |
mutex_lock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
746 |
} |
17da2bd90 [CVE-2009-0029] S... |
747 748 |
SYSCALL_DEFINE2(delete_module, const char __user *, name_user, unsigned int, flags) |
1da177e4c Linux-2.6.12-rc2 |
749 750 |
{ struct module *mod; |
dfff0a067 Revert "Driver co... |
751 |
char name[MODULE_NAME_LEN]; |
1da177e4c Linux-2.6.12-rc2 |
752 |
int ret, forced = 0; |
3d43321b7 modules: sysctl t... |
753 |
if (!capable(CAP_SYS_MODULE) || modules_disabled) |
dfff0a067 Revert "Driver co... |
754 755 756 757 758 |
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... |
759 760 |
if (mutex_lock_interruptible(&module_mutex) != 0) return -EINTR; |
1da177e4c Linux-2.6.12-rc2 |
761 762 763 764 765 766 |
mod = find_module(name); if (!mod) { ret = -ENOENT; goto out; } |
2c02dfe7f module: Make the ... |
767 |
if (!list_empty(&mod->source_list)) { |
1da177e4c Linux-2.6.12-rc2 |
768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 |
/* Other modules depend on us: get rid of them first. */ ret = -EWOULDBLOCK; goto out; } /* Doing init or already dying? */ if (mod->state != MODULE_STATE_LIVE) { /* FIXME: if (force), slam module count and wake up waiter --RR */ DEBUGP("%s already dying ", mod->name); ret = -EBUSY; goto out; } /* If it has an init func, it must have an exit func to unload */ |
af49d9248 Remove "unsafe" f... |
784 |
if (mod->init && !mod->exit) { |
fb1697933 [PATCH] modules: ... |
785 |
forced = try_force_unload(flags); |
1da177e4c Linux-2.6.12-rc2 |
786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 |
if (!forced) { /* This module can't be removed */ ret = -EBUSY; goto out; } } /* Set this up before setting mod->state */ mod->waiter = current; /* Stop the machine so refcounts can't move and disable module. */ ret = try_stop_module(mod, flags, &forced); if (ret != 0) goto out; /* Never wait if forced. */ if (!forced && module_refcount(mod) != 0) wait_for_zero_refcount(mod); |
df4b565e1 module: add MODUL... |
804 |
mutex_unlock(&module_mutex); |
25985edce Fix common misspe... |
805 |
/* Final destruction now no one is using it. */ |
df4b565e1 module: add MODUL... |
806 |
if (mod->exit != NULL) |
1da177e4c Linux-2.6.12-rc2 |
807 |
mod->exit(); |
df4b565e1 module: add MODUL... |
808 809 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); |
22a9d6456 async: Asynchrono... |
810 |
async_synchronize_full(); |
75676500f module: make lock... |
811 |
|
e14af7eeb debug: track and ... |
812 |
/* Store the name of the last unloaded module for diagnostic purposes */ |
efa5345e3 module: Fix gratu... |
813 |
strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module)); |
1da177e4c Linux-2.6.12-rc2 |
814 |
|
75676500f module: make lock... |
815 816 817 |
free_module(mod); return 0; out: |
6389a3851 [PATCH] kernel/mo... |
818 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
819 820 |
return ret; } |
d1e99d7ae module: fix warni... |
821 |
static inline void print_unload_info(struct seq_file *m, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
822 823 824 825 826 827 828 829 |
{ struct module_use *use; int printed_something = 0; seq_printf(m, " %u ", module_refcount(mod)); /* Always include a trailing , so userspace can differentiate between this and the old multi-field proc format. */ |
2c02dfe7f module: Make the ... |
830 |
list_for_each_entry(use, &mod->source_list, source_list) { |
1da177e4c Linux-2.6.12-rc2 |
831 |
printed_something = 1; |
2c02dfe7f module: Make the ... |
832 |
seq_printf(m, "%s,", use->source->name); |
1da177e4c Linux-2.6.12-rc2 |
833 |
} |
1da177e4c Linux-2.6.12-rc2 |
834 835 836 837 838 839 840 841 842 843 844 845 |
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 |
846 |
|
24da1cbff modules: remove m... |
847 |
preempt_disable(); |
414fd31b2 module: Make find... |
848 |
if (!find_symbol(symbol, &owner, NULL, true, false)) |
1da177e4c Linux-2.6.12-rc2 |
849 850 |
BUG(); module_put(owner); |
24da1cbff modules: remove m... |
851 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
852 853 |
} EXPORT_SYMBOL(__symbol_put); |
7d1d16e41 module: fix BUG_O... |
854 |
/* Note this assumes addr is a function, which it currently always is. */ |
1da177e4c Linux-2.6.12-rc2 |
855 856 |
void symbol_put_addr(void *addr) { |
5e3766138 [PATCH] symbol_pu... |
857 |
struct module *modaddr; |
7d1d16e41 module: fix BUG_O... |
858 |
unsigned long a = (unsigned long)dereference_function_descriptor(addr); |
1da177e4c Linux-2.6.12-rc2 |
859 |
|
7d1d16e41 module: fix BUG_O... |
860 |
if (core_kernel_text(a)) |
5e3766138 [PATCH] symbol_pu... |
861 |
return; |
1da177e4c Linux-2.6.12-rc2 |
862 |
|
a6e6abd57 module: remove mo... |
863 864 |
/* 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... |
865 |
modaddr = __module_text_address(a); |
a6e6abd57 module: remove mo... |
866 |
BUG_ON(!modaddr); |
5e3766138 [PATCH] symbol_pu... |
867 |
module_put(modaddr); |
1da177e4c Linux-2.6.12-rc2 |
868 869 870 871 |
} EXPORT_SYMBOL_GPL(symbol_put_addr); static ssize_t show_refcnt(struct module_attribute *mattr, |
4befb026c module: change at... |
872 |
struct module_kobject *mk, char *buffer) |
1da177e4c Linux-2.6.12-rc2 |
873 |
{ |
4befb026c module: change at... |
874 875 |
return sprintf(buffer, "%u ", module_refcount(mk->mod)); |
1da177e4c Linux-2.6.12-rc2 |
876 877 878 |
} static struct module_attribute refcnt = { |
7b595756e sysfs: kill unnec... |
879 |
.attr = { .name = "refcnt", .mode = 0444 }, |
1da177e4c Linux-2.6.12-rc2 |
880 881 |
.show = show_refcnt, }; |
f6a570333 [PATCH] severing ... |
882 883 884 |
void module_put(struct module *module) { if (module) { |
e1783a240 module: Use this_... |
885 |
preempt_disable(); |
5fbfb18d7 Fix up possibly r... |
886 887 |
smp_wmb(); /* see comment in module_refcount */ __this_cpu_inc(module->refptr->decs); |
e1783a240 module: Use this_... |
888 |
|
ae832d1e0 tracing: Remove s... |
889 |
trace_module_put(module, _RET_IP_); |
f6a570333 [PATCH] severing ... |
890 891 892 |
/* Maybe they're waiting for us to drop reference? */ if (unlikely(!module_is_live(module))) wake_up_process(module->waiter); |
e1783a240 module: Use this_... |
893 |
preempt_enable(); |
f6a570333 [PATCH] severing ... |
894 895 896 |
} } EXPORT_SYMBOL(module_put); |
1da177e4c Linux-2.6.12-rc2 |
897 |
#else /* !CONFIG_MODULE_UNLOAD */ |
d1e99d7ae module: fix warni... |
898 |
static inline void print_unload_info(struct seq_file *m, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
899 900 901 902 903 904 905 906 |
{ /* 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 ... |
907 |
int ref_module(struct module *a, struct module *b) |
1da177e4c Linux-2.6.12-rc2 |
908 |
{ |
9bea7f239 module: fix bne2 ... |
909 |
return strong_try_module_get(b); |
1da177e4c Linux-2.6.12-rc2 |
910 |
} |
9bea7f239 module: fix bne2 ... |
911 |
EXPORT_SYMBOL_GPL(ref_module); |
1da177e4c Linux-2.6.12-rc2 |
912 |
|
9f85a4bbb module: refactor ... |
913 |
static inline int module_unload_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
914 |
{ |
9f85a4bbb module: refactor ... |
915 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
916 917 |
} #endif /* CONFIG_MODULE_UNLOAD */ |
1f71740ab Driver core: show... |
918 |
static ssize_t show_initstate(struct module_attribute *mattr, |
4befb026c module: change at... |
919 |
struct module_kobject *mk, char *buffer) |
1f71740ab Driver core: show... |
920 921 |
{ const char *state = "unknown"; |
4befb026c module: change at... |
922 |
switch (mk->mod->state) { |
1f71740ab Driver core: show... |
923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 |
case MODULE_STATE_LIVE: state = "live"; break; case MODULE_STATE_COMING: state = "coming"; break; case MODULE_STATE_GOING: state = "going"; break; } return sprintf(buffer, "%s ", state); } static struct module_attribute initstate = { |
7b595756e sysfs: kill unnec... |
938 |
.attr = { .name = "initstate", .mode = 0444 }, |
1f71740ab Driver core: show... |
939 940 |
.show = show_initstate, }; |
88bfa3247 module: add /sys/... |
941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 |
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; } struct module_attribute module_uevent = { .attr = { .name = "uevent", .mode = 0200 }, .store = store_uevent, }; |
03e88ae1b [PATCH] fix modul... |
956 957 958 |
static struct module_attribute *modinfo_attrs[] = { &modinfo_version, &modinfo_srcversion, |
1f71740ab Driver core: show... |
959 |
&initstate, |
88bfa3247 module: add /sys/... |
960 |
&module_uevent, |
03e88ae1b [PATCH] fix modul... |
961 962 963 964 965 |
#ifdef CONFIG_MODULE_UNLOAD &refcnt, #endif NULL, }; |
1da177e4c Linux-2.6.12-rc2 |
966 |
static const char vermagic[] = VERMAGIC_STRING; |
c6e665c8f module: clarify t... |
967 |
static int try_to_force_load(struct module *mod, const char *reason) |
826e4506a Make forced modul... |
968 969 |
{ #ifdef CONFIG_MODULE_FORCE_LOAD |
25ddbb18a Make the taint fl... |
970 |
if (!test_taint(TAINT_FORCED_MODULE)) |
c6e665c8f module: clarify t... |
971 972 973 |
printk(KERN_WARNING "%s: %s: kernel tainted. ", mod->name, reason); |
826e4506a Make forced modul... |
974 975 976 977 978 979 |
add_taint_module(mod, TAINT_FORCED_MODULE); return 0; #else return -ENOEXEC; #endif } |
1da177e4c Linux-2.6.12-rc2 |
980 |
#ifdef CONFIG_MODVERSIONS |
d4703aefd module: handle pp... |
981 982 983 984 985 986 987 988 989 990 |
/* 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 |
991 992 993 994 |
static int check_version(Elf_Shdr *sechdrs, unsigned int versindex, const char *symname, struct module *mod, |
d4703aefd module: handle pp... |
995 996 |
const unsigned long *crc, const struct module *crc_owner) |
1da177e4c Linux-2.6.12-rc2 |
997 998 999 1000 1001 1002 1003 |
{ 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... |
1004 1005 1006 |
/* 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 |
1007 1008 1009 1010 1011 1012 1013 |
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... |
1014 |
if (versions[i].crc == maybe_relocated(*crc, crc_owner)) |
1da177e4c Linux-2.6.12-rc2 |
1015 |
return 1; |
1da177e4c Linux-2.6.12-rc2 |
1016 1017 |
DEBUGP("Found checksum %lX vs module %lX ", |
d4703aefd module: handle pp... |
1018 |
maybe_relocated(*crc, crc_owner), versions[i].crc); |
826e4506a Make forced modul... |
1019 |
goto bad_version; |
1da177e4c Linux-2.6.12-rc2 |
1020 |
} |
826e4506a Make forced modul... |
1021 |
|
a5dd69707 module: be more p... |
1022 1023 1024 1025 |
printk(KERN_WARNING "%s: no symbol version for %s ", mod->name, symname); return 0; |
826e4506a Make forced modul... |
1026 1027 1028 1029 1030 1031 |
bad_version: printk("%s: disagrees about version of symbol %s ", mod->name, symname); return 0; |
1da177e4c Linux-2.6.12-rc2 |
1032 1033 1034 1035 1036 1037 1038 |
} 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 |
1039 |
|
75676500f module: make lock... |
1040 1041 |
/* Since this should be found in kernel (which can't be removed), * no locking is necessary. */ |
6560dc160 module: use MODUL... |
1042 1043 |
if (!find_symbol(MODULE_SYMBOL_PREFIX "module_layout", NULL, &crc, true, false)) |
1da177e4c Linux-2.6.12-rc2 |
1044 |
BUG(); |
d4703aefd module: handle pp... |
1045 1046 |
return check_version(sechdrs, versindex, "module_layout", mod, crc, NULL); |
1da177e4c Linux-2.6.12-rc2 |
1047 |
} |
91e37a793 module: don't ign... |
1048 1049 1050 |
/* 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 |
1051 |
{ |
91e37a793 module: don't ign... |
1052 1053 1054 1055 |
if (has_crcs) { amagic += strcspn(amagic, " "); bmagic += strcspn(bmagic, " "); } |
1da177e4c Linux-2.6.12-rc2 |
1056 1057 1058 1059 1060 1061 1062 |
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... |
1063 1064 |
const unsigned long *crc, const struct module *crc_owner) |
1da177e4c Linux-2.6.12-rc2 |
1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 |
{ return 1; } static inline int check_modstruct_version(Elf_Shdr *sechdrs, unsigned int versindex, struct module *mod) { return 1; } |
91e37a793 module: don't ign... |
1075 1076 |
static inline int same_magic(const char *amagic, const char *bmagic, bool has_crcs) |
1da177e4c Linux-2.6.12-rc2 |
1077 1078 1079 1080 |
{ return strcmp(amagic, bmagic) == 0; } #endif /* CONFIG_MODVERSIONS */ |
75676500f module: make lock... |
1081 |
/* Resolve a symbol for this module. I.e. if we find one, record usage. */ |
49668688d module: pass load... |
1082 1083 |
static const struct kernel_symbol *resolve_symbol(struct module *mod, const struct load_info *info, |
414fd31b2 module: Make find... |
1084 |
const char *name, |
9bea7f239 module: fix bne2 ... |
1085 |
char ownername[]) |
1da177e4c Linux-2.6.12-rc2 |
1086 1087 |
{ struct module *owner; |
414fd31b2 module: Make find... |
1088 |
const struct kernel_symbol *sym; |
1da177e4c Linux-2.6.12-rc2 |
1089 |
const unsigned long *crc; |
9bea7f239 module: fix bne2 ... |
1090 |
int err; |
1da177e4c Linux-2.6.12-rc2 |
1091 |
|
75676500f module: make lock... |
1092 |
mutex_lock(&module_mutex); |
414fd31b2 module: Make find... |
1093 |
sym = find_symbol(name, &owner, &crc, |
25ddbb18a Make the taint fl... |
1094 |
!(mod->taints & (1 << TAINT_PROPRIETARY_MODULE)), true); |
9bea7f239 module: fix bne2 ... |
1095 1096 |
if (!sym) goto unlock; |
49668688d module: pass load... |
1097 1098 |
if (!check_version(info->sechdrs, info->index.vers, name, mod, crc, owner)) { |
9bea7f239 module: fix bne2 ... |
1099 1100 |
sym = ERR_PTR(-EINVAL); goto getname; |
1da177e4c Linux-2.6.12-rc2 |
1101 |
} |
9bea7f239 module: fix bne2 ... |
1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 |
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... |
1113 |
mutex_unlock(&module_mutex); |
218ce7351 Revert "module: d... |
1114 |
return sym; |
1da177e4c Linux-2.6.12-rc2 |
1115 |
} |
49668688d module: pass load... |
1116 1117 1118 1119 |
static const struct kernel_symbol * resolve_symbol_wait(struct module *mod, const struct load_info *info, const char *name) |
9bea7f239 module: fix bne2 ... |
1120 1121 |
{ const struct kernel_symbol *ksym; |
49668688d module: pass load... |
1122 |
char owner[MODULE_NAME_LEN]; |
9bea7f239 module: fix bne2 ... |
1123 1124 |
if (wait_event_interruptible_timeout(module_wq, |
49668688d module: pass load... |
1125 1126 |
!IS_ERR(ksym = resolve_symbol(mod, info, name, owner)) || PTR_ERR(ksym) != -EBUSY, |
9bea7f239 module: fix bne2 ... |
1127 1128 1129 |
30 * HZ) <= 0) { printk(KERN_WARNING "%s: gave up waiting for init of module %s. ", |
49668688d module: pass load... |
1130 |
mod->name, owner); |
9bea7f239 module: fix bne2 ... |
1131 1132 1133 |
} return ksym; } |
1da177e4c Linux-2.6.12-rc2 |
1134 1135 1136 1137 |
/* * /sys/module/foo/sections stuff * J. Corbet <corbet@lwn.net> */ |
8f6d03781 module: sysfs cle... |
1138 |
#ifdef CONFIG_SYSFS |
10b465aaf modules: Skip emp... |
1139 |
|
8f6d03781 module: sysfs cle... |
1140 |
#ifdef CONFIG_KALLSYMS |
10b465aaf modules: Skip emp... |
1141 1142 1143 1144 |
static inline bool sect_empty(const Elf_Shdr *sect) { return !(sect->sh_flags & SHF_ALLOC) || sect->sh_size == 0; } |
a58730c42 module: make modu... |
1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 |
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 |
1158 |
static ssize_t module_sect_show(struct module_attribute *mattr, |
4befb026c module: change at... |
1159 |
struct module_kobject *mk, char *buf) |
1da177e4c Linux-2.6.12-rc2 |
1160 1161 1162 |
{ struct module_sect_attr *sattr = container_of(mattr, struct module_sect_attr, mattr); |
9f36e2c44 printk: use %pK f... |
1163 1164 |
return sprintf(buf, "0x%pK ", (void *)sattr->address); |
1da177e4c Linux-2.6.12-rc2 |
1165 |
} |
04b1db9fd [PATCH] /sys/modu... |
1166 1167 |
static void free_sect_attrs(struct module_sect_attrs *sect_attrs) { |
a58730c42 module: make modu... |
1168 |
unsigned int section; |
04b1db9fd [PATCH] /sys/modu... |
1169 1170 1171 1172 1173 |
for (section = 0; section < sect_attrs->nsections; section++) kfree(sect_attrs->attrs[section].name); kfree(sect_attrs); } |
8f6d03781 module: sysfs cle... |
1174 |
static void add_sect_attrs(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1175 1176 1177 1178 1179 |
{ unsigned int nloaded = 0, i, size[2]; struct module_sect_attrs *sect_attrs; struct module_sect_attr *sattr; struct attribute **gattr; |
22a8bdeb5 whitespace fixes:... |
1180 |
|
1da177e4c Linux-2.6.12-rc2 |
1181 |
/* Count loaded sections and allocate structures */ |
8f6d03781 module: sysfs cle... |
1182 1183 |
for (i = 0; i < info->hdr->e_shnum; i++) if (!sect_empty(&info->sechdrs[i])) |
1da177e4c Linux-2.6.12-rc2 |
1184 1185 1186 1187 1188 |
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... |
1189 1190 |
sect_attrs = kzalloc(size[0] + size[1], GFP_KERNEL); if (sect_attrs == NULL) |
1da177e4c Linux-2.6.12-rc2 |
1191 1192 1193 1194 1195 |
return; /* Setup section attributes. */ sect_attrs->grp.name = "sections"; sect_attrs->grp.attrs = (void *)sect_attrs + size[0]; |
04b1db9fd [PATCH] /sys/modu... |
1196 |
sect_attrs->nsections = 0; |
1da177e4c Linux-2.6.12-rc2 |
1197 1198 |
sattr = §_attrs->attrs[0]; gattr = §_attrs->grp.attrs[0]; |
8f6d03781 module: sysfs cle... |
1199 1200 1201 |
for (i = 0; i < info->hdr->e_shnum; i++) { Elf_Shdr *sec = &info->sechdrs[i]; if (sect_empty(sec)) |
35dead423 modules: don't ex... |
1202 |
continue; |
8f6d03781 module: sysfs cle... |
1203 1204 |
sattr->address = sec->sh_addr; sattr->name = kstrdup(info->secstrings + sec->sh_name, |
04b1db9fd [PATCH] /sys/modu... |
1205 1206 1207 1208 |
GFP_KERNEL); if (sattr->name == NULL) goto out; sect_attrs->nsections++; |
361795b1e sysfs: Use sysfs_... |
1209 |
sysfs_attr_init(&sattr->mattr.attr); |
1da177e4c Linux-2.6.12-rc2 |
1210 1211 1212 |
sattr->mattr.show = module_sect_show; sattr->mattr.store = NULL; sattr->mattr.attr.name = sattr->name; |
1da177e4c Linux-2.6.12-rc2 |
1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 |
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... |
1224 |
free_sect_attrs(sect_attrs); |
1da177e4c Linux-2.6.12-rc2 |
1225 1226 1227 1228 1229 1230 1231 1232 1233 |
} 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... |
1234 |
free_sect_attrs(mod->sect_attrs); |
1da177e4c Linux-2.6.12-rc2 |
1235 1236 1237 |
mod->sect_attrs = NULL; } } |
6d7601338 Add /sys/module/n... |
1238 1239 1240 1241 1242 1243 1244 1245 1246 |
/* * /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... |
1247 |
static ssize_t module_notes_read(struct file *filp, struct kobject *kobj, |
6d7601338 Add /sys/module/n... |
1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 |
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... |
1265 |
kobject_put(notes_attrs->dir); |
6d7601338 Add /sys/module/n... |
1266 1267 1268 |
} kfree(notes_attrs); } |
8f6d03781 module: sysfs cle... |
1269 |
static void add_notes_attrs(struct module *mod, const struct load_info *info) |
6d7601338 Add /sys/module/n... |
1270 1271 1272 1273 |
{ unsigned int notes, loaded, i; struct module_notes_attrs *notes_attrs; struct bin_attribute *nattr; |
ea6bff368 modules: Fix buil... |
1274 1275 1276 |
/* failed to create section attributes, so can't create notes */ if (!mod->sect_attrs) return; |
6d7601338 Add /sys/module/n... |
1277 1278 |
/* Count notes sections and allocate structures. */ notes = 0; |
8f6d03781 module: sysfs cle... |
1279 1280 1281 |
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... |
1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 |
++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... |
1295 1296 |
for (loaded = i = 0; i < info->hdr->e_shnum; ++i) { if (sect_empty(&info->sechdrs[i])) |
6d7601338 Add /sys/module/n... |
1297 |
continue; |
8f6d03781 module: sysfs cle... |
1298 |
if (info->sechdrs[i].sh_type == SHT_NOTE) { |
361795b1e sysfs: Use sysfs_... |
1299 |
sysfs_bin_attr_init(nattr); |
6d7601338 Add /sys/module/n... |
1300 1301 |
nattr->attr.name = mod->sect_attrs->attrs[loaded].name; nattr->attr.mode = S_IRUGO; |
8f6d03781 module: sysfs cle... |
1302 1303 |
nattr->size = info->sechdrs[i].sh_size; nattr->private = (void *) info->sechdrs[i].sh_addr; |
6d7601338 Add /sys/module/n... |
1304 1305 1306 1307 1308 |
nattr->read = module_notes_read; ++nattr; } ++loaded; } |
4ff6abff8 kobject: get rid ... |
1309 |
notes_attrs->dir = kobject_create_and_add("notes", &mod->mkobj.kobj); |
6d7601338 Add /sys/module/n... |
1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 |
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 |
1330 |
#else |
04b1db9fd [PATCH] /sys/modu... |
1331 |
|
8f6d03781 module: sysfs cle... |
1332 1333 |
static inline void add_sect_attrs(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1334 1335 1336 1337 1338 1339 |
{ } static inline void remove_sect_attrs(struct module *mod) { } |
6d7601338 Add /sys/module/n... |
1340 |
|
8f6d03781 module: sysfs cle... |
1341 1342 |
static inline void add_notes_attrs(struct module *mod, const struct load_info *info) |
6d7601338 Add /sys/module/n... |
1343 1344 1345 1346 1347 1348 |
{ } static inline void remove_notes_attrs(struct module *mod) { } |
8f6d03781 module: sysfs cle... |
1349 |
#endif /* CONFIG_KALLSYMS */ |
1da177e4c Linux-2.6.12-rc2 |
1350 |
|
80a3d1bb4 module: move sysf... |
1351 1352 1353 1354 1355 |
static void add_usage_links(struct module *mod) { #ifdef CONFIG_MODULE_UNLOAD struct module_use *use; int nowarn; |
75676500f module: make lock... |
1356 |
mutex_lock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1357 1358 1359 1360 |
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... |
1361 |
mutex_unlock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1362 1363 1364 1365 1366 1367 1368 |
#endif } static void del_usage_links(struct module *mod) { #ifdef CONFIG_MODULE_UNLOAD struct module_use *use; |
75676500f module: make lock... |
1369 |
mutex_lock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1370 1371 |
list_for_each_entry(use, &mod->target_list, target_list) sysfs_remove_link(use->target->holders_dir, mod->name); |
75676500f module: make lock... |
1372 |
mutex_unlock(&module_mutex); |
80a3d1bb4 module: move sysf... |
1373 1374 |
#endif } |
6407ebb27 module: Make modu... |
1375 |
static int module_add_modinfo_attrs(struct module *mod) |
c988d2b28 [PATCH] modules: ... |
1376 1377 |
{ struct module_attribute *attr; |
03e88ae1b [PATCH] fix modul... |
1378 |
struct module_attribute *temp_attr; |
c988d2b28 [PATCH] modules: ... |
1379 1380 |
int error = 0; int i; |
03e88ae1b [PATCH] fix modul... |
1381 1382 1383 1384 1385 1386 1387 |
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: ... |
1388 1389 |
for (i = 0; (attr = modinfo_attrs[i]) && !error; i++) { if (!attr->test || |
03e88ae1b [PATCH] fix modul... |
1390 1391 |
(attr->test && attr->test(mod))) { memcpy(temp_attr, attr, sizeof(*temp_attr)); |
361795b1e sysfs: Use sysfs_... |
1392 |
sysfs_attr_init(&temp_attr->attr); |
03e88ae1b [PATCH] fix modul... |
1393 1394 1395 |
error = sysfs_create_file(&mod->mkobj.kobj,&temp_attr->attr); ++temp_attr; } |
c988d2b28 [PATCH] modules: ... |
1396 1397 1398 |
} return error; } |
6407ebb27 module: Make modu... |
1399 |
static void module_remove_modinfo_attrs(struct module *mod) |
c988d2b28 [PATCH] modules: ... |
1400 1401 1402 |
{ struct module_attribute *attr; int i; |
03e88ae1b [PATCH] fix modul... |
1403 1404 1405 1406 |
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: ... |
1407 |
sysfs_remove_file(&mod->mkobj.kobj,&attr->attr); |
03e88ae1b [PATCH] fix modul... |
1408 1409 |
if (attr->free) attr->free(mod); |
c988d2b28 [PATCH] modules: ... |
1410 |
} |
03e88ae1b [PATCH] fix modul... |
1411 |
kfree(mod->modinfo_attrs); |
c988d2b28 [PATCH] modules: ... |
1412 |
} |
1da177e4c Linux-2.6.12-rc2 |
1413 |
|
6407ebb27 module: Make modu... |
1414 |
static int mod_sysfs_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1415 1416 |
{ int err; |
6494a93d5 Module: check to ... |
1417 |
struct kobject *kobj; |
1da177e4c Linux-2.6.12-rc2 |
1418 |
|
823bccfc4 remove "struct su... |
1419 1420 1421 |
if (!module_sysfs_initialized) { printk(KERN_ERR "%s: module sysfs not initialized ", |
1cc5f7142 [PATCH] load_modu... |
1422 1423 1424 1425 |
mod->name); err = -EINVAL; goto out; } |
6494a93d5 Module: check to ... |
1426 1427 1428 1429 1430 1431 1432 1433 1434 |
kobj = kset_find_obj(module_kset, mod->name); if (kobj) { printk(KERN_ERR "%s: module is already loaded ", mod->name); kobject_put(kobj); err = -EINVAL; goto out; } |
1da177e4c Linux-2.6.12-rc2 |
1435 |
mod->mkobj.mod = mod; |
e17e0f51a Driver core: show... |
1436 |
|
ac3c8141f Kobject: convert ... |
1437 1438 1439 1440 1441 1442 |
memset(&mod->mkobj.kobj, 0, sizeof(mod->mkobj.kobj)); mod->mkobj.kobj.kset = module_kset; err = kobject_init_and_add(&mod->mkobj.kobj, &module_ktype, NULL, "%s", mod->name); if (err) kobject_put(&mod->mkobj.kobj); |
270a6c4ca /sys/modules/*/ho... |
1443 |
|
97c146ef0 sysfs: fix /sys/m... |
1444 |
/* delay uevent until full sysfs population */ |
270a6c4ca /sys/modules/*/ho... |
1445 1446 1447 |
out: return err; } |
6407ebb27 module: Make modu... |
1448 |
static int mod_sysfs_setup(struct module *mod, |
8f6d03781 module: sysfs cle... |
1449 |
const struct load_info *info, |
270a6c4ca /sys/modules/*/ho... |
1450 1451 1452 1453 |
struct kernel_param *kparam, unsigned int num_params) { int err; |
80a3d1bb4 module: move sysf... |
1454 1455 1456 |
err = mod_sysfs_init(mod); if (err) goto out; |
4ff6abff8 kobject: get rid ... |
1457 |
mod->holders_dir = kobject_create_and_add("holders", &mod->mkobj.kobj); |
240936e18 mod_sysfs_setup()... |
1458 1459 |
if (!mod->holders_dir) { err = -ENOMEM; |
270a6c4ca /sys/modules/*/ho... |
1460 |
goto out_unreg; |
240936e18 mod_sysfs_setup()... |
1461 |
} |
270a6c4ca /sys/modules/*/ho... |
1462 |
|
1da177e4c Linux-2.6.12-rc2 |
1463 1464 |
err = module_param_sysfs_setup(mod, kparam, num_params); if (err) |
270a6c4ca /sys/modules/*/ho... |
1465 |
goto out_unreg_holders; |
1da177e4c Linux-2.6.12-rc2 |
1466 |
|
c988d2b28 [PATCH] modules: ... |
1467 1468 |
err = module_add_modinfo_attrs(mod); if (err) |
e17e0f51a Driver core: show... |
1469 |
goto out_unreg_param; |
c988d2b28 [PATCH] modules: ... |
1470 |
|
80a3d1bb4 module: move sysf... |
1471 |
add_usage_links(mod); |
8f6d03781 module: sysfs cle... |
1472 1473 |
add_sect_attrs(mod, info); add_notes_attrs(mod, info); |
80a3d1bb4 module: move sysf... |
1474 |
|
e17e0f51a Driver core: show... |
1475 |
kobject_uevent(&mod->mkobj.kobj, KOBJ_ADD); |
1da177e4c Linux-2.6.12-rc2 |
1476 |
return 0; |
e17e0f51a Driver core: show... |
1477 1478 |
out_unreg_param: module_param_sysfs_remove(mod); |
270a6c4ca /sys/modules/*/ho... |
1479 |
out_unreg_holders: |
78a2d906b Kobject: convert ... |
1480 |
kobject_put(mod->holders_dir); |
270a6c4ca /sys/modules/*/ho... |
1481 |
out_unreg: |
e17e0f51a Driver core: show... |
1482 |
kobject_put(&mod->mkobj.kobj); |
80a3d1bb4 module: move sysf... |
1483 |
out: |
1da177e4c Linux-2.6.12-rc2 |
1484 1485 |
return err; } |
34e4e2fef modules: proper c... |
1486 1487 1488 |
static void mod_sysfs_fini(struct module *mod) { |
8f6d03781 module: sysfs cle... |
1489 1490 |
remove_notes_attrs(mod); remove_sect_attrs(mod); |
34e4e2fef modules: proper c... |
1491 1492 |
kobject_put(&mod->mkobj.kobj); } |
8f6d03781 module: sysfs cle... |
1493 |
#else /* !CONFIG_SYSFS */ |
34e4e2fef modules: proper c... |
1494 |
|
8f6d03781 module: sysfs cle... |
1495 1496 |
static int mod_sysfs_setup(struct module *mod, const struct load_info *info, |
6407ebb27 module: Make modu... |
1497 1498 1499 1500 1501 |
struct kernel_param *kparam, unsigned int num_params) { return 0; } |
34e4e2fef modules: proper c... |
1502 1503 1504 |
static void mod_sysfs_fini(struct module *mod) { } |
36b0360d1 module: fix sysfs... |
1505 1506 1507 |
static void module_remove_modinfo_attrs(struct module *mod) { } |
80a3d1bb4 module: move sysf... |
1508 1509 1510 |
static void del_usage_links(struct module *mod) { } |
34e4e2fef modules: proper c... |
1511 |
#endif /* CONFIG_SYSFS */ |
1da177e4c Linux-2.6.12-rc2 |
1512 |
|
36b0360d1 module: fix sysfs... |
1513 |
static void mod_sysfs_teardown(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1514 |
{ |
80a3d1bb4 module: move sysf... |
1515 |
del_usage_links(mod); |
c988d2b28 [PATCH] modules: ... |
1516 |
module_remove_modinfo_attrs(mod); |
1da177e4c Linux-2.6.12-rc2 |
1517 |
module_param_sysfs_remove(mod); |
78a2d906b Kobject: convert ... |
1518 1519 |
kobject_put(mod->mkobj.drivers_dir); kobject_put(mod->holders_dir); |
34e4e2fef modules: proper c... |
1520 |
mod_sysfs_fini(mod); |
1da177e4c Linux-2.6.12-rc2 |
1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 |
} /* * 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... |
1531 |
module_bug_cleanup(mod); |
1da177e4c Linux-2.6.12-rc2 |
1532 1533 |
return 0; } |
84e1c6bb3 x86: Add RO/NX pr... |
1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 |
#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... |
1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 |
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... |
1595 1596 1597 |
} /* Iterate through all modules and set each module's text as RW */ |
5d05c7084 minor ANSI protot... |
1598 |
void set_all_modules_text_rw(void) |
84e1c6bb3 x86: Add RO/NX pr... |
1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 |
{ struct module *mod; mutex_lock(&module_mutex); list_for_each_entry_rcu(mod, &modules, list) { 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... |
1619 |
void set_all_modules_text_ro(void) |
84e1c6bb3 x86: Add RO/NX pr... |
1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 |
{ struct module *mod; mutex_lock(&module_mutex); list_for_each_entry_rcu(mod, &modules, list) { 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... |
1640 1641 |
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... |
1642 |
#endif |
74e08fcf7 modules: add defa... |
1643 1644 1645 1646 1647 1648 1649 1650 |
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... |
1651 |
/* Free a module, remove from lists, etc. */ |
1da177e4c Linux-2.6.12-rc2 |
1652 1653 |
static void free_module(struct module *mod) { |
7ead8b831 tracing/events: A... |
1654 |
trace_module_free(mod); |
1da177e4c Linux-2.6.12-rc2 |
1655 |
/* Delete from various lists */ |
75676500f module: make lock... |
1656 |
mutex_lock(&module_mutex); |
9b1a4d383 stop_machine: Wea... |
1657 |
stop_machine(__unlink_module, mod, NULL); |
75676500f module: make lock... |
1658 |
mutex_unlock(&module_mutex); |
36b0360d1 module: fix sysfs... |
1659 |
mod_sysfs_teardown(mod); |
1da177e4c Linux-2.6.12-rc2 |
1660 |
|
b82bab4bb dynamic debug: mo... |
1661 1662 |
/* Remove dynamic debug info */ ddebug_remove_module(mod->name); |
1da177e4c Linux-2.6.12-rc2 |
1663 1664 1665 1666 1667 |
/* Arch-specific cleanup. */ module_arch_cleanup(mod); /* Module unload stuff */ module_unload_free(mod); |
e180a6b77 param: fix charp ... |
1668 1669 |
/* Free any allocated parameters. */ destroy_params(mod->kp, mod->num_kp); |
1da177e4c Linux-2.6.12-rc2 |
1670 |
/* This may be NULL, but that's OK */ |
01526ed08 module: split uns... |
1671 |
unset_module_init_ro_nx(mod); |
1da177e4c Linux-2.6.12-rc2 |
1672 1673 |
module_free(mod, mod->module_init); kfree(mod->args); |
259354dea module: encapsula... |
1674 |
percpu_modfree(mod); |
9f85a4bbb module: refactor ... |
1675 |
|
fbb9ce953 [PATCH] lockdep: ... |
1676 1677 |
/* Free lock-classes: */ lockdep_free_key_range(mod->module_core, mod->core_size); |
1da177e4c Linux-2.6.12-rc2 |
1678 |
/* Finally, free the core (containing the module structure) */ |
01526ed08 module: split uns... |
1679 |
unset_module_core_ro_nx(mod); |
1da177e4c Linux-2.6.12-rc2 |
1680 |
module_free(mod, mod->module_core); |
eb8cdec4a nommu: add suppor... |
1681 1682 1683 1684 |
#ifdef CONFIG_MPU update_protections(current->mm); #endif |
1da177e4c Linux-2.6.12-rc2 |
1685 1686 1687 1688 1689 |
} void *__symbol_get(const char *symbol) { struct module *owner; |
414fd31b2 module: Make find... |
1690 |
const struct kernel_symbol *sym; |
1da177e4c Linux-2.6.12-rc2 |
1691 |
|
24da1cbff modules: remove m... |
1692 |
preempt_disable(); |
414fd31b2 module: Make find... |
1693 1694 1695 |
sym = find_symbol(symbol, &owner, NULL, true, true); if (sym && strong_try_module_get(owner)) sym = NULL; |
24da1cbff modules: remove m... |
1696 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
1697 |
|
414fd31b2 module: Make find... |
1698 |
return sym ? (void *)sym->value : NULL; |
1da177e4c Linux-2.6.12-rc2 |
1699 1700 |
} EXPORT_SYMBOL_GPL(__symbol_get); |
eea8b54dc [PATCH] modules: ... |
1701 1702 |
/* * Ensure that an exported symbol [global namespace] does not already exist |
02a3e59a0 Fix minor typoes ... |
1703 |
* in the kernel or in some other module's exported symbol table. |
be593f4ce module: verify_ex... |
1704 1705 |
* * You must hold the module_mutex. |
eea8b54dc [PATCH] modules: ... |
1706 1707 1708 |
*/ static int verify_export_symbols(struct module *mod) { |
b211104d1 module: Enhance v... |
1709 |
unsigned int i; |
eea8b54dc [PATCH] modules: ... |
1710 |
struct module *owner; |
b211104d1 module: Enhance v... |
1711 1712 1713 1714 1715 1716 1717 1718 |
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... |
1719 |
#ifdef CONFIG_UNUSED_SYMBOLS |
b211104d1 module: Enhance v... |
1720 1721 |
{ mod->unused_syms, mod->num_unused_syms }, { mod->unused_gpl_syms, mod->num_unused_gpl_syms }, |
f7f5b6755 Shrink struct mod... |
1722 |
#endif |
b211104d1 module: Enhance v... |
1723 |
}; |
eea8b54dc [PATCH] modules: ... |
1724 |
|
b211104d1 module: Enhance v... |
1725 1726 |
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... |
1727 |
if (find_symbol(s->name, &owner, NULL, true, false)) { |
b211104d1 module: Enhance v... |
1728 1729 1730 1731 1732 1733 1734 |
printk(KERN_ERR "%s: exports duplicate symbol %s" " (owned by %s) ", mod->name, s->name, module_name(owner)); return -ENOEXEC; } |
eea8b54dc [PATCH] modules: ... |
1735 |
} |
b211104d1 module: Enhance v... |
1736 1737 |
} return 0; |
eea8b54dc [PATCH] modules: ... |
1738 |
} |
9a4b9708f module: fix and e... |
1739 |
/* Change all symbols so that st_value encodes the pointer directly. */ |
49668688d module: pass load... |
1740 1741 1742 1743 |
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 |
1744 |
unsigned long secbase; |
49668688d module: pass load... |
1745 |
unsigned int i; |
1da177e4c Linux-2.6.12-rc2 |
1746 |
int ret = 0; |
414fd31b2 module: Make find... |
1747 |
const struct kernel_symbol *ksym; |
1da177e4c Linux-2.6.12-rc2 |
1748 |
|
49668688d module: pass load... |
1749 1750 |
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 |
1751 1752 1753 1754 |
switch (sym[i].st_shndx) { case SHN_COMMON: /* We compiled with -fno-common. These are not supposed to happen. */ |
49668688d module: pass load... |
1755 1756 |
DEBUGP("Common symbol: %s ", name); |
1da177e4c Linux-2.6.12-rc2 |
1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 |
printk("%s: please compile with -fno-common ", mod->name); ret = -ENOEXEC; break; case SHN_ABS: /* Don't need to do anything */ DEBUGP("Absolute symbol: 0x%08lx ", (long)sym[i].st_value); break; case SHN_UNDEF: |
49668688d module: pass load... |
1771 |
ksym = resolve_symbol_wait(mod, info, name); |
1da177e4c Linux-2.6.12-rc2 |
1772 |
/* Ok if resolved. */ |
9bea7f239 module: fix bne2 ... |
1773 |
if (ksym && !IS_ERR(ksym)) { |
414fd31b2 module: Make find... |
1774 |
sym[i].st_value = ksym->value; |
1da177e4c Linux-2.6.12-rc2 |
1775 |
break; |
414fd31b2 module: Make find... |
1776 |
} |
1da177e4c Linux-2.6.12-rc2 |
1777 |
/* Ok if weak. */ |
9bea7f239 module: fix bne2 ... |
1778 |
if (!ksym && ELF_ST_BIND(sym[i].st_info) == STB_WEAK) |
1da177e4c Linux-2.6.12-rc2 |
1779 |
break; |
9bea7f239 module: fix bne2 ... |
1780 1781 |
printk(KERN_WARNING "%s: Unknown symbol %s (err %li) ", |
49668688d module: pass load... |
1782 |
mod->name, name, PTR_ERR(ksym)); |
9bea7f239 module: fix bne2 ... |
1783 |
ret = PTR_ERR(ksym) ?: -ENOENT; |
1da177e4c Linux-2.6.12-rc2 |
1784 1785 1786 1787 |
break; default: /* Divert to percpu allocation if a percpu var. */ |
49668688d module: pass load... |
1788 |
if (sym[i].st_shndx == info->index.pcpu) |
259354dea module: encapsula... |
1789 |
secbase = (unsigned long)mod_percpu(mod); |
1da177e4c Linux-2.6.12-rc2 |
1790 |
else |
49668688d module: pass load... |
1791 |
secbase = info->sechdrs[sym[i].st_shndx].sh_addr; |
1da177e4c Linux-2.6.12-rc2 |
1792 1793 1794 1795 1796 1797 1798 |
sym[i].st_value += secbase; break; } } return ret; } |
74e08fcf7 modules: add defa... |
1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 |
int __weak apply_relocate(Elf_Shdr *sechdrs, const char *strtab, unsigned int symindex, unsigned int relsec, struct module *me) { pr_err("module %s: REL relocation unsupported ", me->name); return -ENOEXEC; } int __weak apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab, unsigned int symindex, unsigned int relsec, struct module *me) { pr_err("module %s: RELA relocation unsupported ", me->name); return -ENOEXEC; } |
49668688d module: pass load... |
1820 |
static int apply_relocations(struct module *mod, const struct load_info *info) |
22e268ebe module: refactor ... |
1821 1822 1823 1824 1825 |
{ unsigned int i; int err = 0; /* Now do relocations. */ |
49668688d module: pass load... |
1826 1827 |
for (i = 1; i < info->hdr->e_shnum; i++) { unsigned int infosec = info->sechdrs[i].sh_info; |
22e268ebe module: refactor ... |
1828 1829 |
/* Not a valid relocation section? */ |
49668688d module: pass load... |
1830 |
if (infosec >= info->hdr->e_shnum) |
22e268ebe module: refactor ... |
1831 1832 1833 |
continue; /* Don't bother with non-allocated sections */ |
49668688d module: pass load... |
1834 |
if (!(info->sechdrs[infosec].sh_flags & SHF_ALLOC)) |
22e268ebe module: refactor ... |
1835 |
continue; |
49668688d module: pass load... |
1836 1837 1838 1839 1840 1841 |
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 ... |
1842 1843 1844 1845 1846 |
if (err < 0) break; } return err; } |
088af9a6e module: fix modul... |
1847 1848 1849 1850 1851 1852 1853 |
/* 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 |
1854 |
/* Update size with this section: return offset. */ |
088af9a6e module: fix modul... |
1855 1856 |
static long get_offset(struct module *mod, unsigned int *size, Elf_Shdr *sechdr, unsigned int section) |
1da177e4c Linux-2.6.12-rc2 |
1857 1858 |
{ long ret; |
088af9a6e module: fix modul... |
1859 |
*size += arch_mod_section_prepend(mod, section); |
1da177e4c Linux-2.6.12-rc2 |
1860 1861 1862 1863 1864 1865 1866 1867 1868 |
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... |
1869 |
static void layout_sections(struct module *mod, struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 |
{ 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... |
1881 1882 |
for (i = 0; i < info->hdr->e_shnum; i++) info->sechdrs[i].sh_entsize = ~0UL; |
1da177e4c Linux-2.6.12-rc2 |
1883 1884 1885 1886 |
DEBUGP("Core section allocation order: "); for (m = 0; m < ARRAY_SIZE(masks); ++m) { |
49668688d module: pass load... |
1887 1888 1889 |
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 |
1890 1891 1892 1893 |
if ((s->sh_flags & masks[m][0]) != masks[m][0] || (s->sh_flags & masks[m][1]) || s->sh_entsize != ~0UL |
49668688d module: pass load... |
1894 |
|| strstarts(sname, ".init")) |
1da177e4c Linux-2.6.12-rc2 |
1895 |
continue; |
088af9a6e module: fix modul... |
1896 |
s->sh_entsize = get_offset(mod, &mod->core_size, s, i); |
49668688d module: pass load... |
1897 1898 |
DEBUGP("\t%s ", name); |
1da177e4c Linux-2.6.12-rc2 |
1899 |
} |
84e1c6bb3 x86: Add RO/NX pr... |
1900 1901 1902 |
switch (m) { case 0: /* executable */ mod->core_size = debug_align(mod->core_size); |
1da177e4c Linux-2.6.12-rc2 |
1903 |
mod->core_text_size = mod->core_size; |
84e1c6bb3 x86: Add RO/NX pr... |
1904 1905 1906 1907 1908 1909 1910 1911 1912 |
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 |
1913 1914 1915 1916 1917 |
} DEBUGP("Init section allocation order: "); for (m = 0; m < ARRAY_SIZE(masks); ++m) { |
49668688d module: pass load... |
1918 1919 1920 |
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 |
1921 1922 1923 1924 |
if ((s->sh_flags & masks[m][0]) != masks[m][0] || (s->sh_flags & masks[m][1]) || s->sh_entsize != ~0UL |
49668688d module: pass load... |
1925 |
|| !strstarts(sname, ".init")) |
1da177e4c Linux-2.6.12-rc2 |
1926 |
continue; |
088af9a6e module: fix modul... |
1927 |
s->sh_entsize = (get_offset(mod, &mod->init_size, s, i) |
1da177e4c Linux-2.6.12-rc2 |
1928 |
| INIT_OFFSET_MASK); |
49668688d module: pass load... |
1929 1930 |
DEBUGP("\t%s ", sname); |
1da177e4c Linux-2.6.12-rc2 |
1931 |
} |
84e1c6bb3 x86: Add RO/NX pr... |
1932 1933 1934 |
switch (m) { case 0: /* executable */ mod->init_size = debug_align(mod->init_size); |
1da177e4c Linux-2.6.12-rc2 |
1935 |
mod->init_text_size = mod->init_size; |
84e1c6bb3 x86: Add RO/NX pr... |
1936 1937 1938 1939 1940 1941 1942 1943 1944 |
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 |
1945 1946 |
} } |
1da177e4c Linux-2.6.12-rc2 |
1947 1948 1949 1950 |
static void set_license(struct module *mod, const char *license) { if (!license) license = "unspecified"; |
fa3ba2e81 [PATCH] fix Modul... |
1951 |
if (!license_is_gpl_compatible(license)) { |
25ddbb18a Make the taint fl... |
1952 |
if (!test_taint(TAINT_PROPRIETARY_MODULE)) |
1d4d26276 [PATCH] Add missi... |
1953 |
printk(KERN_WARNING "%s: module license '%s' taints " |
fa3ba2e81 [PATCH] fix Modul... |
1954 1955 1956 |
"kernel. ", mod->name, license); add_taint_module(mod, TAINT_PROPRIETARY_MODULE); |
1da177e4c Linux-2.6.12-rc2 |
1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 |
} } /* 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... |
1978 |
static char *get_modinfo(struct load_info *info, const char *tag) |
1da177e4c Linux-2.6.12-rc2 |
1979 1980 1981 |
{ char *p; unsigned int taglen = strlen(tag); |
49668688d module: pass load... |
1982 1983 |
Elf_Shdr *infosec = &info->sechdrs[info->index.info]; unsigned long size = infosec->sh_size; |
1da177e4c Linux-2.6.12-rc2 |
1984 |
|
49668688d module: pass load... |
1985 |
for (p = (char *)infosec->sh_addr; p; p = next_string(p, &size)) { |
1da177e4c Linux-2.6.12-rc2 |
1986 1987 1988 1989 1990 |
if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=') return p + taglen + 1; } return NULL; } |
49668688d module: pass load... |
1991 |
static void setup_modinfo(struct module *mod, struct load_info *info) |
c988d2b28 [PATCH] modules: ... |
1992 1993 1994 1995 1996 1997 |
{ struct module_attribute *attr; int i; for (i = 0; (attr = modinfo_attrs[i]); i++) { if (attr->setup) |
49668688d module: pass load... |
1998 |
attr->setup(mod, get_modinfo(info, attr->attr.name)); |
c988d2b28 [PATCH] modules: ... |
1999 2000 |
} } |
c988d2b28 [PATCH] modules: ... |
2001 |
|
a263f7763 module: fix memor... |
2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 |
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 |
2012 |
#ifdef CONFIG_KALLSYMS |
15bba37d6 module: fix build... |
2013 2014 2015 2016 2017 2018 |
/* 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... |
2019 2020 |
return bsearch(name, start, stop - start, sizeof(struct kernel_symbol), cmp_name); |
15bba37d6 module: fix build... |
2021 |
} |
ca4787b77 kernel/module.c: ... |
2022 2023 |
static int is_exported(const char *name, unsigned long value, const struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
2024 |
{ |
ca4787b77 kernel/module.c: ... |
2025 2026 2027 |
const struct kernel_symbol *ks; if (!mod) ks = lookup_symbol(name, __start___ksymtab, __stop___ksymtab); |
3fd6805f4 [PATCH] Clean up ... |
2028 |
else |
ca4787b77 kernel/module.c: ... |
2029 2030 |
ks = lookup_symbol(name, mod->syms, mod->syms + mod->num_syms); return ks != NULL && ks->value == value; |
1da177e4c Linux-2.6.12-rc2 |
2031 2032 2033 |
} /* As per nm */ |
eded41c1c module: kallsyms ... |
2034 |
static char elf_type(const Elf_Sym *sym, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2035 |
{ |
eded41c1c module: kallsyms ... |
2036 |
const Elf_Shdr *sechdrs = info->sechdrs; |
1da177e4c Linux-2.6.12-rc2 |
2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 |
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 ... |
2066 2067 |
if (strstarts(info->secstrings + sechdrs[sym->st_shndx].sh_name, ".debug")) { |
1da177e4c Linux-2.6.12-rc2 |
2068 |
return 'n'; |
eded41c1c module: kallsyms ... |
2069 |
} |
1da177e4c Linux-2.6.12-rc2 |
2070 2071 |
return '?'; } |
4a4962263 module: reduce sy... |
2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 |
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; } |
49668688d module: pass load... |
2092 |
static void layout_symtab(struct module *mod, struct load_info *info) |
4a4962263 module: reduce sy... |
2093 |
{ |
49668688d module: pass load... |
2094 2095 |
Elf_Shdr *symsect = info->sechdrs + info->index.sym; Elf_Shdr *strsect = info->sechdrs + info->index.str; |
4a4962263 module: reduce sy... |
2096 2097 2098 2099 2100 2101 |
const Elf_Sym *src; unsigned int i, nsrc, ndst; /* 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... |
2102 2103 2104 |
info->index.sym) | INIT_OFFSET_MASK; DEBUGP("\t%s ", info->secstrings + symsect->sh_name); |
4a4962263 module: reduce sy... |
2105 |
|
49668688d module: pass load... |
2106 |
src = (void *)info->hdr + symsect->sh_offset; |
4a4962263 module: reduce sy... |
2107 2108 |
nsrc = symsect->sh_size / sizeof(*src); for (ndst = i = 1; i < nsrc; ++i, ++src) |
49668688d module: pass load... |
2109 |
if (is_core_symbol(src, info->sechdrs, info->hdr->e_shnum)) { |
554bdfe5a module: reduce st... |
2110 |
unsigned int j = src->st_name; |
49668688d module: pass load... |
2111 2112 |
while (!__test_and_set_bit(j, info->strmap) && info->strtab[j]) |
554bdfe5a module: reduce st... |
2113 |
++j; |
4a4962263 module: reduce sy... |
2114 |
++ndst; |
554bdfe5a module: reduce st... |
2115 |
} |
4a4962263 module: reduce sy... |
2116 2117 |
/* Append room for core symbols at end of core part. */ |
49668688d module: pass load... |
2118 2119 |
info->symoffs = ALIGN(mod->core_size, symsect->sh_addralign ?: 1); mod->core_size = info->symoffs + ndst * sizeof(Elf_Sym); |
4a4962263 module: reduce sy... |
2120 |
|
554bdfe5a module: reduce st... |
2121 2122 2123 |
/* 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... |
2124 2125 2126 |
info->index.str) | INIT_OFFSET_MASK; DEBUGP("\t%s ", info->secstrings + strsect->sh_name); |
554bdfe5a module: reduce st... |
2127 2128 |
/* Append room for core symbols' strings at end of core part. */ |
49668688d module: pass load... |
2129 2130 2131 |
info->stroffs = mod->core_size; __set_bit(0, info->strmap); mod->core_size += bitmap_weight(info->strmap, strsect->sh_size); |
4a4962263 module: reduce sy... |
2132 |
} |
811d66a0e module: group pos... |
2133 |
static void add_kallsyms(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2134 |
{ |
4a4962263 module: reduce sy... |
2135 2136 2137 |
unsigned int i, ndst; const Elf_Sym *src; Elf_Sym *dst; |
554bdfe5a module: reduce st... |
2138 |
char *s; |
eded41c1c module: kallsyms ... |
2139 |
Elf_Shdr *symsec = &info->sechdrs[info->index.sym]; |
1da177e4c Linux-2.6.12-rc2 |
2140 |
|
eded41c1c module: kallsyms ... |
2141 2142 |
mod->symtab = (void *)symsec->sh_addr; mod->num_symtab = symsec->sh_size / sizeof(Elf_Sym); |
511ca6ae4 module: fix crash... |
2143 2144 |
/* 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 |
2145 2146 2147 |
/* Set types up while we still have access to sections. */ for (i = 0; i < mod->num_symtab; i++) |
eded41c1c module: kallsyms ... |
2148 |
mod->symtab[i].st_info = elf_type(&mod->symtab[i], info); |
4a4962263 module: reduce sy... |
2149 |
|
d913188c7 module: layout_an... |
2150 |
mod->core_symtab = dst = mod->module_core + info->symoffs; |
4a4962263 module: reduce sy... |
2151 2152 2153 |
src = mod->symtab; *dst = *src; for (ndst = i = 1; i < mod->num_symtab; ++i, ++src) { |
eded41c1c module: kallsyms ... |
2154 |
if (!is_core_symbol(src, info->sechdrs, info->hdr->e_shnum)) |
4a4962263 module: reduce sy... |
2155 2156 |
continue; dst[ndst] = *src; |
d913188c7 module: layout_an... |
2157 2158 |
dst[ndst].st_name = bitmap_weight(info->strmap, dst[ndst].st_name); |
4a4962263 module: reduce sy... |
2159 2160 2161 |
++ndst; } mod->core_num_syms = ndst; |
554bdfe5a module: reduce st... |
2162 |
|
d913188c7 module: layout_an... |
2163 |
mod->core_strtab = s = mod->module_core + info->stroffs; |
eded41c1c module: kallsyms ... |
2164 |
for (*s = 0, i = 1; i < info->sechdrs[info->index.str].sh_size; ++i) |
d913188c7 module: layout_an... |
2165 |
if (test_bit(i, info->strmap)) |
554bdfe5a module: reduce st... |
2166 |
*++s = mod->strtab[i]; |
1da177e4c Linux-2.6.12-rc2 |
2167 2168 |
} #else |
49668688d module: pass load... |
2169 |
static inline void layout_symtab(struct module *mod, struct load_info *info) |
4a4962263 module: reduce sy... |
2170 2171 |
{ } |
3ae91c21d module: fix up CO... |
2172 |
|
abbce906d (trivial) Fix com... |
2173 |
static void add_kallsyms(struct module *mod, const struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2174 2175 2176 |
{ } #endif /* CONFIG_KALLSYMS */ |
e9d376f0f dynamic debug: co... |
2177 |
static void dynamic_debug_setup(struct _ddebug *debug, unsigned int num) |
346e15beb driver core: basi... |
2178 |
{ |
811d66a0e module: group pos... |
2179 2180 |
if (!debug) return; |
e9d376f0f dynamic debug: co... |
2181 2182 2183 2184 2185 2186 |
#ifdef CONFIG_DYNAMIC_DEBUG if (ddebug_add_module(debug, num, debug->modname)) printk(KERN_ERR "dynamic debug error adding module: %s ", debug->modname); #endif |
5e458cc0f module: simplify ... |
2187 |
} |
346e15beb driver core: basi... |
2188 |
|
ff49d74ad module: initializ... |
2189 2190 2191 2192 2193 |
static void dynamic_debug_remove(struct _ddebug *debug) { if (debug) ddebug_remove_module(debug->modname); } |
74e08fcf7 modules: add defa... |
2194 2195 2196 2197 |
void * __weak module_alloc(unsigned long size) { return size == 0 ? NULL : vmalloc_exec(size); } |
3a642e99b modules: Take a s... |
2198 2199 2200 2201 2202 |
static void *module_alloc_update_bounds(unsigned long size) { void *ret = module_alloc(size); if (ret) { |
75676500f module: make lock... |
2203 |
mutex_lock(&module_mutex); |
3a642e99b modules: Take a s... |
2204 2205 2206 2207 2208 |
/* 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... |
2209 |
mutex_unlock(&module_mutex); |
3a642e99b modules: Take a s... |
2210 2211 2212 |
} return ret; } |
4f2294b6d kmemleak: Add mod... |
2213 |
#ifdef CONFIG_DEBUG_KMEMLEAK |
49668688d module: pass load... |
2214 2215 |
static void kmemleak_load_module(const struct module *mod, const struct load_info *info) |
4f2294b6d kmemleak: Add mod... |
2216 2217 2218 2219 |
{ unsigned int i; /* only scan the sections containing data */ |
c017b4be3 kmemleak: Simplif... |
2220 |
kmemleak_scan_area(mod, sizeof(struct module), GFP_KERNEL); |
4f2294b6d kmemleak: Add mod... |
2221 |
|
49668688d module: pass load... |
2222 2223 2224 |
for (i = 1; i < info->hdr->e_shnum; i++) { const char *name = info->secstrings + info->sechdrs[i].sh_name; if (!(info->sechdrs[i].sh_flags & SHF_ALLOC)) |
4f2294b6d kmemleak: Add mod... |
2225 |
continue; |
49668688d module: pass load... |
2226 |
if (!strstarts(name, ".data") && !strstarts(name, ".bss")) |
4f2294b6d kmemleak: Add mod... |
2227 |
continue; |
49668688d module: pass load... |
2228 2229 |
kmemleak_scan_area((void *)info->sechdrs[i].sh_addr, info->sechdrs[i].sh_size, GFP_KERNEL); |
4f2294b6d kmemleak: Add mod... |
2230 2231 2232 |
} } #else |
49668688d module: pass load... |
2233 2234 |
static inline void kmemleak_load_module(const struct module *mod, const struct load_info *info) |
4f2294b6d kmemleak: Add mod... |
2235 2236 2237 |
{ } #endif |
6526c534b module: move modu... |
2238 |
/* Sets info->hdr and info->len. */ |
d913188c7 module: layout_an... |
2239 2240 2241 |
static int copy_and_check(struct load_info *info, const void __user *umod, unsigned long len, const char __user *uargs) |
40dd2560e module: refactor ... |
2242 2243 2244 2245 2246 2247 2248 2249 2250 |
{ int err; Elf_Ehdr *hdr; if (len < sizeof(*hdr)) return -ENOEXEC; /* Suck in entire file: we'll want most of it. */ /* vmalloc barfs on "unusual" numbers. Check here */ |
3264d3f9d module: add load_... |
2251 |
if (len > 64 * 1024 * 1024 || (hdr = vmalloc(len)) == NULL) |
40dd2560e module: refactor ... |
2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 |
return -ENOMEM; if (copy_from_user(hdr, umod, len) != 0) { err = -EFAULT; goto free_hdr; } /* Sanity checks against insmoding binaries or wrong arch, weird elf version */ if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0 || hdr->e_type != ET_REL || !elf_check_arch(hdr) || hdr->e_shentsize != sizeof(Elf_Shdr)) { err = -ENOEXEC; goto free_hdr; } if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr)) { err = -ENOEXEC; goto free_hdr; } |
d913188c7 module: layout_an... |
2273 |
|
3264d3f9d module: add load_... |
2274 2275 |
info->hdr = hdr; info->len = len; |
40dd2560e module: refactor ... |
2276 2277 2278 2279 2280 2281 |
return 0; free_hdr: vfree(hdr); return err; } |
d913188c7 module: layout_an... |
2282 2283 |
static void free_copy(struct load_info *info) { |
d913188c7 module: layout_an... |
2284 2285 |
vfree(info->hdr); } |
8b5f61a79 module: refactor ... |
2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 |
static int rewrite_section_headers(struct load_info *info) { unsigned int i; /* This should always be true, but let's be sure. */ info->sechdrs[0].sh_addr = 0; for (i = 1; i < info->hdr->e_shnum; i++) { Elf_Shdr *shdr = &info->sechdrs[i]; if (shdr->sh_type != SHT_NOBITS && info->len < shdr->sh_offset + shdr->sh_size) { printk(KERN_ERR "Module len %lu truncated ", info->len); return -ENOEXEC; } /* Mark all sections sh_addr with their address in the temporary image. */ shdr->sh_addr = (size_t)info->hdr + shdr->sh_offset; #ifndef CONFIG_MODULE_UNLOAD /* Don't load .exit sections */ if (strstarts(info->secstrings+shdr->sh_name, ".exit")) shdr->sh_flags &= ~(unsigned long)SHF_ALLOC; #endif |
8b5f61a79 module: refactor ... |
2312 |
} |
d6df72a06 module: refactor ... |
2313 2314 |
/* Track but don't keep modinfo and version sections. */ |
49668688d module: pass load... |
2315 2316 |
info->index.vers = find_sec(info, "__versions"); info->index.info = find_sec(info, ".modinfo"); |
d6df72a06 module: refactor ... |
2317 2318 |
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 ... |
2319 2320 |
return 0; } |
3264d3f9d module: add load_... |
2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 |
/* * 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). */ static struct module *setup_load_info(struct load_info *info) { unsigned int i; |
8b5f61a79 module: refactor ... |
2332 |
int err; |
3264d3f9d module: add load_... |
2333 2334 2335 2336 |
struct module *mod; /* Set up the convenience variables */ info->sechdrs = (void *)info->hdr + info->hdr->e_shoff; |
8b5f61a79 module: refactor ... |
2337 2338 |
info->secstrings = (void *)info->hdr + info->sechdrs[info->hdr->e_shstrndx].sh_offset; |
3264d3f9d module: add load_... |
2339 |
|
8b5f61a79 module: refactor ... |
2340 2341 2342 |
err = rewrite_section_headers(info); if (err) return ERR_PTR(err); |
3264d3f9d module: add load_... |
2343 |
|
8b5f61a79 module: refactor ... |
2344 2345 |
/* Find internal symbols and strings. */ for (i = 1; i < info->hdr->e_shnum; i++) { |
3264d3f9d module: add load_... |
2346 2347 2348 |
if (info->sechdrs[i].sh_type == SHT_SYMTAB) { info->index.sym = i; info->index.str = info->sechdrs[i].sh_link; |
8b5f61a79 module: refactor ... |
2349 2350 2351 |
info->strtab = (char *)info->hdr + info->sechdrs[info->index.str].sh_offset; break; |
3264d3f9d module: add load_... |
2352 |
} |
3264d3f9d module: add load_... |
2353 |
} |
49668688d module: pass load... |
2354 |
info->index.mod = find_sec(info, ".gnu.linkonce.this_module"); |
3264d3f9d module: add load_... |
2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 |
if (!info->index.mod) { printk(KERN_WARNING "No module found in object "); return ERR_PTR(-ENOEXEC); } /* This is temporary: point mod into copy of data. */ mod = (void *)info->sechdrs[info->index.mod].sh_addr; if (info->index.sym == 0) { printk(KERN_WARNING "%s: module has no symbols (stripped?) ", mod->name); return ERR_PTR(-ENOEXEC); } |
49668688d module: pass load... |
2369 |
info->index.pcpu = find_pcpusec(info); |
3264d3f9d module: add load_... |
2370 |
|
3264d3f9d module: add load_... |
2371 2372 2373 2374 2375 |
/* 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_... |
2376 |
} |
49668688d module: pass load... |
2377 |
static int check_modinfo(struct module *mod, struct load_info *info) |
40dd2560e module: refactor ... |
2378 |
{ |
49668688d module: pass load... |
2379 |
const char *modmagic = get_modinfo(info, "vermagic"); |
40dd2560e module: refactor ... |
2380 2381 2382 2383 2384 2385 2386 |
int err; /* 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... |
2387 |
} else if (!same_magic(modmagic, vermagic, info->index.vers)) { |
40dd2560e module: refactor ... |
2388 2389 2390 2391 2392 |
printk(KERN_ERR "%s: version magic '%s' should be '%s' ", mod->name, modmagic, vermagic); return -ENOEXEC; } |
2449b8ba0 module,bug: Add T... |
2393 2394 |
if (!get_modinfo(info, "intree")) add_taint_module(mod, TAINT_OOT_MODULE); |
49668688d module: pass load... |
2395 |
if (get_modinfo(info, "staging")) { |
40dd2560e module: refactor ... |
2396 2397 2398 2399 2400 2401 |
add_taint_module(mod, TAINT_CRAP); printk(KERN_WARNING "%s: module is from the staging directory," " the quality is unknown, you have been warned. ", mod->name); } |
22e268ebe module: refactor ... |
2402 2403 |
/* Set up license info based on the info section */ |
49668688d module: pass load... |
2404 |
set_license(mod, get_modinfo(info, "license")); |
22e268ebe module: refactor ... |
2405 |
|
40dd2560e module: refactor ... |
2406 2407 |
return 0; } |
811d66a0e module: group pos... |
2408 |
static void find_module_sections(struct module *mod, struct load_info *info) |
f91a13bb9 module: refactor ... |
2409 |
{ |
49668688d module: pass load... |
2410 |
mod->kp = section_objs(info, "__param", |
f91a13bb9 module: refactor ... |
2411 |
sizeof(*mod->kp), &mod->num_kp); |
49668688d module: pass load... |
2412 |
mod->syms = section_objs(info, "__ksymtab", |
f91a13bb9 module: refactor ... |
2413 |
sizeof(*mod->syms), &mod->num_syms); |
49668688d module: pass load... |
2414 2415 |
mod->crcs = section_addr(info, "__kcrctab"); mod->gpl_syms = section_objs(info, "__ksymtab_gpl", |
f91a13bb9 module: refactor ... |
2416 2417 |
sizeof(*mod->gpl_syms), &mod->num_gpl_syms); |
49668688d module: pass load... |
2418 2419 |
mod->gpl_crcs = section_addr(info, "__kcrctab_gpl"); mod->gpl_future_syms = section_objs(info, |
f91a13bb9 module: refactor ... |
2420 2421 2422 |
"__ksymtab_gpl_future", sizeof(*mod->gpl_future_syms), &mod->num_gpl_future_syms); |
49668688d module: pass load... |
2423 |
mod->gpl_future_crcs = section_addr(info, "__kcrctab_gpl_future"); |
f91a13bb9 module: refactor ... |
2424 2425 |
#ifdef CONFIG_UNUSED_SYMBOLS |
49668688d module: pass load... |
2426 |
mod->unused_syms = section_objs(info, "__ksymtab_unused", |
f91a13bb9 module: refactor ... |
2427 2428 |
sizeof(*mod->unused_syms), &mod->num_unused_syms); |
49668688d module: pass load... |
2429 2430 |
mod->unused_crcs = section_addr(info, "__kcrctab_unused"); mod->unused_gpl_syms = section_objs(info, "__ksymtab_unused_gpl", |
f91a13bb9 module: refactor ... |
2431 2432 |
sizeof(*mod->unused_gpl_syms), &mod->num_unused_gpl_syms); |
49668688d module: pass load... |
2433 |
mod->unused_gpl_crcs = section_addr(info, "__kcrctab_unused_gpl"); |
f91a13bb9 module: refactor ... |
2434 2435 |
#endif #ifdef CONFIG_CONSTRUCTORS |
49668688d module: pass load... |
2436 |
mod->ctors = section_objs(info, ".ctors", |
f91a13bb9 module: refactor ... |
2437 2438 2439 2440 |
sizeof(*mod->ctors), &mod->num_ctors); #endif #ifdef CONFIG_TRACEPOINTS |
654986462 tracepoints: Fix ... |
2441 2442 2443 |
mod->tracepoints_ptrs = section_objs(info, "__tracepoints_ptrs", sizeof(*mod->tracepoints_ptrs), &mod->num_tracepoints); |
f91a13bb9 module: refactor ... |
2444 |
#endif |
bf5438fca jump label: Base ... |
2445 2446 2447 2448 2449 |
#ifdef HAVE_JUMP_LABEL mod->jump_entries = section_objs(info, "__jump_table", sizeof(*mod->jump_entries), &mod->num_jump_entries); #endif |
f91a13bb9 module: refactor ... |
2450 |
#ifdef CONFIG_EVENT_TRACING |
49668688d module: pass load... |
2451 |
mod->trace_events = section_objs(info, "_ftrace_events", |
f91a13bb9 module: refactor ... |
2452 2453 2454 2455 2456 2457 2458 2459 2460 |
sizeof(*mod->trace_events), &mod->num_trace_events); /* * This section contains pointers to allocated objects in the trace * code and not scanning it leads to false positives. */ kmemleak_scan_area(mod->trace_events, sizeof(*mod->trace_events) * mod->num_trace_events, GFP_KERNEL); #endif |
13b9b6e74 tracing: Fix modu... |
2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 |
#ifdef CONFIG_TRACING mod->trace_bprintk_fmt_start = section_objs(info, "__trace_printk_fmt", sizeof(*mod->trace_bprintk_fmt_start), &mod->num_trace_bprintk_fmt); /* * This section contains pointers to allocated objects in the trace * code and not scanning it leads to false positives. */ kmemleak_scan_area(mod->trace_bprintk_fmt_start, sizeof(*mod->trace_bprintk_fmt_start) * mod->num_trace_bprintk_fmt, GFP_KERNEL); #endif |
f91a13bb9 module: refactor ... |
2473 2474 |
#ifdef CONFIG_FTRACE_MCOUNT_RECORD /* sechdrs[0].sh_size is always zero */ |
49668688d module: pass load... |
2475 |
mod->ftrace_callsites = section_objs(info, "__mcount_loc", |
f91a13bb9 module: refactor ... |
2476 2477 2478 |
sizeof(*mod->ftrace_callsites), &mod->num_ftrace_callsites); #endif |
22e268ebe module: refactor ... |
2479 |
|
811d66a0e module: group pos... |
2480 2481 |
mod->extable = section_objs(info, "__ex_table", sizeof(*mod->extable), &mod->num_exentries); |
49668688d module: pass load... |
2482 |
if (section_addr(info, "__obsparm")) |
22e268ebe module: refactor ... |
2483 2484 2485 |
printk(KERN_WARNING "%s: Ignoring obsolete parameters ", mod->name); |
811d66a0e module: group pos... |
2486 2487 2488 |
info->debug = section_objs(info, "__verbose", sizeof(*info->debug), &info->num_debug); |
f91a13bb9 module: refactor ... |
2489 |
} |
49668688d module: pass load... |
2490 |
static int move_module(struct module *mod, struct load_info *info) |
65b8a9b4d module: refactor ... |
2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 |
{ 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... |
2504 |
return -ENOMEM; |
65b8a9b4d module: refactor ... |
2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 |
memset(ptr, 0, mod->core_size); mod->module_core = ptr; 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 && mod->init_size) { module_free(mod, mod->module_core); |
d913188c7 module: layout_an... |
2519 |
return -ENOMEM; |
65b8a9b4d module: refactor ... |
2520 2521 2522 2523 2524 2525 2526 |
} memset(ptr, 0, mod->init_size); mod->module_init = ptr; /* Transfer each section which specifies SHF_ALLOC */ DEBUGP("final section addresses: "); |
49668688d module: pass load... |
2527 |
for (i = 0; i < info->hdr->e_shnum; i++) { |
65b8a9b4d module: refactor ... |
2528 |
void *dest; |
49668688d module: pass load... |
2529 |
Elf_Shdr *shdr = &info->sechdrs[i]; |
65b8a9b4d module: refactor ... |
2530 |
|
49668688d module: pass load... |
2531 |
if (!(shdr->sh_flags & SHF_ALLOC)) |
65b8a9b4d module: refactor ... |
2532 |
continue; |
49668688d module: pass load... |
2533 |
if (shdr->sh_entsize & INIT_OFFSET_MASK) |
65b8a9b4d module: refactor ... |
2534 |
dest = mod->module_init |
49668688d module: pass load... |
2535 |
+ (shdr->sh_entsize & ~INIT_OFFSET_MASK); |
65b8a9b4d module: refactor ... |
2536 |
else |
49668688d module: pass load... |
2537 |
dest = mod->module_core + shdr->sh_entsize; |
65b8a9b4d module: refactor ... |
2538 |
|
49668688d module: pass load... |
2539 2540 |
if (shdr->sh_type != SHT_NOBITS) memcpy(dest, (void *)shdr->sh_addr, shdr->sh_size); |
65b8a9b4d module: refactor ... |
2541 |
/* Update sh_addr to point to copy in image. */ |
49668688d module: pass load... |
2542 |
shdr->sh_addr = (unsigned long)dest; |
65b8a9b4d module: refactor ... |
2543 2544 |
DEBUGP("\t0x%lx %s ", |
49668688d module: pass load... |
2545 |
shdr->sh_addr, info->secstrings + shdr->sh_name); |
65b8a9b4d module: refactor ... |
2546 |
} |
d913188c7 module: layout_an... |
2547 2548 |
return 0; |
65b8a9b4d module: refactor ... |
2549 |
} |
49668688d module: pass load... |
2550 |
static int check_module_license_and_versions(struct module *mod) |
22e268ebe module: refactor ... |
2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 |
{ /* * 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) add_taint(TAINT_PROPRIETARY_MODULE); /* driverloader was caught wrongly pretending to be under GPL */ if (strcmp(mod->name, "driverloader") == 0) add_taint_module(mod, TAINT_PROPRIETARY_MODULE); #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... |
2602 2603 2604 2605 2606 2607 2608 |
int __weak module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, char *secstrings, struct module *mod) { return 0; } |
d913188c7 module: layout_an... |
2609 |
static struct module *layout_and_allocate(struct load_info *info) |
1da177e4c Linux-2.6.12-rc2 |
2610 |
{ |
d913188c7 module: layout_an... |
2611 |
/* Module within temporary copy. */ |
1da177e4c Linux-2.6.12-rc2 |
2612 |
struct module *mod; |
49668688d module: pass load... |
2613 |
Elf_Shdr *pcpusec; |
d913188c7 module: layout_an... |
2614 |
int err; |
3ae91c21d module: fix up CO... |
2615 |
|
d913188c7 module: layout_an... |
2616 2617 2618 |
mod = setup_load_info(info); if (IS_ERR(mod)) return mod; |
1da177e4c Linux-2.6.12-rc2 |
2619 |
|
49668688d module: pass load... |
2620 |
err = check_modinfo(mod, info); |
40dd2560e module: refactor ... |
2621 2622 |
if (err) return ERR_PTR(err); |
1da177e4c Linux-2.6.12-rc2 |
2623 |
|
1da177e4c Linux-2.6.12-rc2 |
2624 |
/* Allow arches to frob section contents and sizes. */ |
49668688d module: pass load... |
2625 2626 |
err = module_frob_arch_sections(info->hdr, info->sechdrs, info->secstrings, mod); |
1da177e4c Linux-2.6.12-rc2 |
2627 |
if (err < 0) |
6526c534b module: move modu... |
2628 |
goto out; |
1da177e4c Linux-2.6.12-rc2 |
2629 |
|
49668688d module: pass load... |
2630 2631 |
pcpusec = &info->sechdrs[info->index.pcpu]; if (pcpusec->sh_size) { |
1da177e4c Linux-2.6.12-rc2 |
2632 |
/* We have a special allocation for this section. */ |
49668688d module: pass load... |
2633 2634 |
err = percpu_modalloc(mod, pcpusec->sh_size, pcpusec->sh_addralign); |
259354dea module: encapsula... |
2635 |
if (err) |
6526c534b module: move modu... |
2636 |
goto out; |
49668688d module: pass load... |
2637 |
pcpusec->sh_flags &= ~(unsigned long)SHF_ALLOC; |
1da177e4c Linux-2.6.12-rc2 |
2638 2639 2640 2641 2642 |
} /* 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... |
2643 |
layout_sections(mod, info); |
d913188c7 module: layout_an... |
2644 2645 2646 2647 2648 2649 2650 |
info->strmap = kzalloc(BITS_TO_LONGS(info->sechdrs[info->index.str].sh_size) * sizeof(long), GFP_KERNEL); if (!info->strmap) { err = -ENOMEM; goto free_percpu; } |
49668688d module: pass load... |
2651 |
layout_symtab(mod, info); |
1da177e4c Linux-2.6.12-rc2 |
2652 |
|
65b8a9b4d module: refactor ... |
2653 |
/* Allocate and move to the final place */ |
49668688d module: pass load... |
2654 |
err = move_module(mod, info); |
d913188c7 module: layout_an... |
2655 2656 2657 2658 2659 |
if (err) goto free_strmap; /* Module has been copied to its final place now: return it. */ mod = (void *)info->sechdrs[info->index.mod].sh_addr; |
49668688d module: pass load... |
2660 |
kmemleak_load_module(mod, info); |
d913188c7 module: layout_an... |
2661 2662 2663 2664 2665 2666 |
return mod; free_strmap: kfree(info->strmap); free_percpu: percpu_modfree(mod); |
6526c534b module: move modu... |
2667 |
out: |
d913188c7 module: layout_an... |
2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 |
return ERR_PTR(err); } /* mod is no longer valid after this! */ static void module_deallocate(struct module *mod, struct load_info *info) { kfree(info->strmap); percpu_modfree(mod); module_free(mod, mod->module_init); module_free(mod, mod->module_core); } |
74e08fcf7 modules: add defa... |
2679 2680 2681 2682 2683 2684 |
int __weak module_finalize(const Elf_Ehdr *hdr, const Elf_Shdr *sechdrs, struct module *me) { return 0; } |
811d66a0e module: group pos... |
2685 2686 |
static int post_relocation(struct module *mod, const struct load_info *info) { |
51f3d0f47 module: cleanup c... |
2687 |
/* Sort exception table now relocations are done. */ |
811d66a0e module: group pos... |
2688 2689 2690 2691 2692 |
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... |
2693 |
/* Setup kallsyms-specific fields. */ |
811d66a0e module: group pos... |
2694 2695 2696 2697 2698 |
add_kallsyms(mod, info); /* Arch-specific module finalizing. */ return module_finalize(info->hdr, info->sechdrs, mod); } |
d913188c7 module: layout_an... |
2699 2700 |
/* Allocate and load the module: note that size of section 0 is always zero, and we rely on this for optional sections. */ |
51f3d0f47 module: cleanup c... |
2701 |
static struct module *load_module(void __user *umod, |
d913188c7 module: layout_an... |
2702 2703 2704 2705 2706 2707 |
unsigned long len, const char __user *uargs) { struct load_info info = { NULL, }; struct module *mod; long err; |
d913188c7 module: layout_an... |
2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 |
DEBUGP("load_module: umod=%p, len=%lu, uargs=%p ", umod, len, uargs); /* Copy in the blobs from userspace, check they are vaguely sane. */ err = copy_and_check(&info, umod, len, uargs); if (err) return ERR_PTR(err); /* Figure out module layout, and allocate all the memory. */ mod = layout_and_allocate(&info); |
65b8a9b4d module: refactor ... |
2720 2721 |
if (IS_ERR(mod)) { err = PTR_ERR(mod); |
d913188c7 module: layout_an... |
2722 |
goto free_copy; |
1da177e4c Linux-2.6.12-rc2 |
2723 |
} |
1da177e4c Linux-2.6.12-rc2 |
2724 |
|
49668688d module: pass load... |
2725 |
/* Now module is in final location, initialize linked lists, etc. */ |
9f85a4bbb module: refactor ... |
2726 2727 |
err = module_unload_init(mod); if (err) |
d913188c7 module: layout_an... |
2728 |
goto free_module; |
1da177e4c Linux-2.6.12-rc2 |
2729 |
|
22e268ebe module: refactor ... |
2730 2731 |
/* Now we've got everything in the final locations, we can * find optional sections. */ |
49668688d module: pass load... |
2732 |
find_module_sections(mod, &info); |
9b37ccfc6 module: allow ndi... |
2733 |
|
49668688d module: pass load... |
2734 |
err = check_module_license_and_versions(mod); |
22e268ebe module: refactor ... |
2735 2736 |
if (err) goto free_unload; |
9841d61d7 [PATCH] Add taint... |
2737 |
|
c988d2b28 [PATCH] modules: ... |
2738 |
/* Set up MODINFO_ATTR fields */ |
49668688d module: pass load... |
2739 |
setup_modinfo(mod, &info); |
c988d2b28 [PATCH] modules: ... |
2740 |
|
1da177e4c Linux-2.6.12-rc2 |
2741 |
/* Fix up syms, so that st_value is a pointer to location. */ |
49668688d module: pass load... |
2742 |
err = simplify_symbols(mod, &info); |
1da177e4c Linux-2.6.12-rc2 |
2743 |
if (err < 0) |
d913188c7 module: layout_an... |
2744 |
goto free_modinfo; |
1da177e4c Linux-2.6.12-rc2 |
2745 |
|
49668688d module: pass load... |
2746 |
err = apply_relocations(mod, &info); |
22e268ebe module: refactor ... |
2747 |
if (err < 0) |
d913188c7 module: layout_an... |
2748 |
goto free_modinfo; |
1da177e4c Linux-2.6.12-rc2 |
2749 |
|
811d66a0e module: group pos... |
2750 |
err = post_relocation(mod, &info); |
1da177e4c Linux-2.6.12-rc2 |
2751 |
if (err < 0) |
d913188c7 module: layout_an... |
2752 |
goto free_modinfo; |
1da177e4c Linux-2.6.12-rc2 |
2753 |
|
22e268ebe module: refactor ... |
2754 |
flush_module_icache(mod); |
378bac820 [PATCH] flush ica... |
2755 |
|
6526c534b module: move modu... |
2756 2757 2758 2759 2760 2761 |
/* 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... |
2762 |
|
51f3d0f47 module: cleanup c... |
2763 |
/* Mark state as coming so strong_try_module_get() ignores us. */ |
d913188c7 module: layout_an... |
2764 |
mod->state = MODULE_STATE_COMING; |
bb9d3d56e module: better OO... |
2765 |
/* Now sew it into the lists so we can get lockdep and oops |
25985edce Fix common misspe... |
2766 |
* info during argument parsing. No one should access us, since |
d72b37513 Remove stop_machi... |
2767 2768 2769 2770 2771 |
* strong_try_module_get() will fail. * lockdep/oops can run asynchronous, so use the RCU list insertion * function to insert in a way safe to concurrent readers. * The mutex protects against concurrent writers. */ |
75676500f module: make lock... |
2772 |
mutex_lock(&module_mutex); |
3bafeb624 module: move find... |
2773 2774 |
if (find_module(mod->name)) { err = -EEXIST; |
be593f4ce module: verify_ex... |
2775 |
goto unlock; |
3bafeb624 module: move find... |
2776 |
} |
811d66a0e module: group pos... |
2777 |
/* This has to be done once we're sure module name is unique. */ |
1cd0d6c30 module: Enable dy... |
2778 |
dynamic_debug_setup(info.debug, info.num_debug); |
ff49d74ad module: initializ... |
2779 |
|
be593f4ce module: verify_ex... |
2780 2781 2782 |
/* Find duplicate symbols */ err = verify_export_symbols(mod); if (err < 0) |
ff49d74ad module: initializ... |
2783 |
goto ddebug; |
be593f4ce module: verify_ex... |
2784 |
|
5336377d6 modules: Fix modu... |
2785 |
module_bug_finalize(info.hdr, info.sechdrs, mod); |
d72b37513 Remove stop_machi... |
2786 |
list_add_rcu(&mod->list, &modules); |
75676500f module: make lock... |
2787 |
mutex_unlock(&module_mutex); |
bb9d3d56e module: better OO... |
2788 |
|
51f3d0f47 module: cleanup c... |
2789 |
/* Module is ready to execute: parsing args may do that. */ |
e180a6b77 param: fix charp ... |
2790 |
err = parse_args(mod->name, mod->args, mod->kp, mod->num_kp, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2791 |
if (err < 0) |
bb9d3d56e module: better OO... |
2792 |
goto unlink; |
1da177e4c Linux-2.6.12-rc2 |
2793 |
|
51f3d0f47 module: cleanup c... |
2794 |
/* Link in to syfs. */ |
8f6d03781 module: sysfs cle... |
2795 |
err = mod_sysfs_setup(mod, &info, mod->kp, mod->num_kp); |
1da177e4c Linux-2.6.12-rc2 |
2796 |
if (err < 0) |
bb9d3d56e module: better OO... |
2797 |
goto unlink; |
80a3d1bb4 module: move sysf... |
2798 |
|
d913188c7 module: layout_an... |
2799 2800 2801 |
/* Get rid of temporary copy and strmap. */ kfree(info.strmap); free_copy(&info); |
1da177e4c Linux-2.6.12-rc2 |
2802 2803 |
/* Done! */ |
51f3d0f47 module: cleanup c... |
2804 |
trace_module_load(mod); |
1da177e4c Linux-2.6.12-rc2 |
2805 |
return mod; |
bb9d3d56e module: better OO... |
2806 |
unlink: |
75676500f module: make lock... |
2807 |
mutex_lock(&module_mutex); |
e91defa26 module: don't use... |
2808 2809 |
/* Unlink carefully: kallsyms could be walking list. */ list_del_rcu(&mod->list); |
5336377d6 modules: Fix modu... |
2810 |
module_bug_cleanup(mod); |
ff49d74ad module: initializ... |
2811 |
ddebug: |
1cd0d6c30 module: Enable dy... |
2812 |
dynamic_debug_remove(info.debug); |
be593f4ce module: verify_ex... |
2813 |
unlock: |
75676500f module: make lock... |
2814 |
mutex_unlock(&module_mutex); |
e91defa26 module: don't use... |
2815 |
synchronize_sched(); |
6526c534b module: move modu... |
2816 2817 |
kfree(mod->args); free_arch_cleanup: |
1da177e4c Linux-2.6.12-rc2 |
2818 |
module_arch_cleanup(mod); |
d913188c7 module: layout_an... |
2819 |
free_modinfo: |
a263f7763 module: fix memor... |
2820 |
free_modinfo(mod); |
22e268ebe module: refactor ... |
2821 |
free_unload: |
1da177e4c Linux-2.6.12-rc2 |
2822 |
module_unload_free(mod); |
d913188c7 module: layout_an... |
2823 2824 2825 2826 |
free_module: module_deallocate(mod, &info); free_copy: free_copy(&info); |
6fe2e70bb [PATCH] kernel/mo... |
2827 |
return ERR_PTR(err); |
1da177e4c Linux-2.6.12-rc2 |
2828 |
} |
b99b87f70 kernel: construct... |
2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 |
/* 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 } |
1da177e4c Linux-2.6.12-rc2 |
2839 |
/* This is where the real work happens */ |
17da2bd90 [CVE-2009-0029] S... |
2840 2841 |
SYSCALL_DEFINE3(init_module, void __user *, umod, unsigned long, len, const char __user *, uargs) |
1da177e4c Linux-2.6.12-rc2 |
2842 2843 2844 2845 2846 |
{ struct module *mod; int ret = 0; /* Must have permission */ |
3d43321b7 modules: sysctl t... |
2847 |
if (!capable(CAP_SYS_MODULE) || modules_disabled) |
1da177e4c Linux-2.6.12-rc2 |
2848 |
return -EPERM; |
1da177e4c Linux-2.6.12-rc2 |
2849 2850 |
/* Do all the hard work */ mod = load_module(umod, len, uargs); |
75676500f module: make lock... |
2851 |
if (IS_ERR(mod)) |
1da177e4c Linux-2.6.12-rc2 |
2852 |
return PTR_ERR(mod); |
1da177e4c Linux-2.6.12-rc2 |
2853 |
|
e041c6834 [PATCH] Notifier ... |
2854 2855 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_COMING, mod); |
1da177e4c Linux-2.6.12-rc2 |
2856 |
|
94462ad3b module: Move RO/N... |
2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 |
/* 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); |
b99b87f70 kernel: construct... |
2868 |
do_mod_ctors(mod); |
1da177e4c Linux-2.6.12-rc2 |
2869 2870 |
/* Start the module */ if (mod->init != NULL) |
59f9415ff modules: extend i... |
2871 |
ret = do_one_initcall(mod->init); |
1da177e4c Linux-2.6.12-rc2 |
2872 2873 2874 2875 |
if (ret < 0) { /* Init routine failed: abort. Try to protect us from buggy refcounters. */ mod->state = MODULE_STATE_GOING; |
fbd568a3e [PATCH] Change sy... |
2876 |
synchronize_sched(); |
af49d9248 Remove "unsafe" f... |
2877 |
module_put(mod); |
df4b565e1 module: add MODUL... |
2878 2879 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); |
af49d9248 Remove "unsafe" f... |
2880 |
free_module(mod); |
c9a3ba55b module: wait for ... |
2881 |
wake_up(&module_wq); |
1da177e4c Linux-2.6.12-rc2 |
2882 2883 |
return ret; } |
e24e2e64c modules: warn abo... |
2884 |
if (ret > 0) { |
ad361c988 Remove multiple K... |
2885 2886 2887 2888 2889 |
printk(KERN_WARNING "%s: '%s'->init suspiciously returned %d, it should follow 0/-E convention " "%s: loading module anyway... ", |
e24e2e64c modules: warn abo... |
2890 2891 2892 2893 |
__func__, mod->name, ret, __func__); dump_stack(); } |
1da177e4c Linux-2.6.12-rc2 |
2894 |
|
6c5db22d2 modules: fix modu... |
2895 |
/* Now it's a first class citizen! Wake up anyone waiting for it. */ |
1da177e4c Linux-2.6.12-rc2 |
2896 |
mod->state = MODULE_STATE_LIVE; |
6c5db22d2 modules: fix modu... |
2897 |
wake_up(&module_wq); |
0deddf436 module: add MODUL... |
2898 2899 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_LIVE, mod); |
6c5db22d2 modules: fix modu... |
2900 |
|
d6de2c80e async: Fix module... |
2901 2902 |
/* We need to finish all async code before the module init sequence is done */ async_synchronize_full(); |
6c5db22d2 modules: fix modu... |
2903 |
mutex_lock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
2904 2905 |
/* Drop initial reference. */ module_put(mod); |
ad6561dff module: trim exce... |
2906 |
trim_init_extable(mod); |
4a4962263 module: reduce sy... |
2907 2908 2909 |
#ifdef CONFIG_KALLSYMS mod->num_symtab = mod->core_num_syms; mod->symtab = mod->core_symtab; |
554bdfe5a module: reduce st... |
2910 |
mod->strtab = mod->core_strtab; |
4a4962263 module: reduce sy... |
2911 |
#endif |
01526ed08 module: split uns... |
2912 |
unset_module_init_ro_nx(mod); |
1da177e4c Linux-2.6.12-rc2 |
2913 2914 2915 |
module_free(mod, mod->module_init); mod->module_init = NULL; mod->init_size = 0; |
4d10380e7 module: zero mod-... |
2916 |
mod->init_ro_size = 0; |
1da177e4c Linux-2.6.12-rc2 |
2917 |
mod->init_text_size = 0; |
6389a3851 [PATCH] kernel/mo... |
2918 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 |
return 0; } static inline int within(unsigned long addr, void *start, unsigned long size) { return ((void *)addr >= start && (void *)addr < start + size); } #ifdef CONFIG_KALLSYMS /* * This ignores the intensely annoying "mapping symbols" found * in ARM ELF files: $a, $t and $d. */ static inline int is_arm_mapping_symbol(const char *str) { |
22a8bdeb5 whitespace fixes:... |
2935 |
return str[0] == '$' && strchr("atd", str[1]) |
1da177e4c Linux-2.6.12-rc2 |
2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 |
&& (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... |
2948 |
if (within_module_init(addr, mod)) |
1da177e4c Linux-2.6.12-rc2 |
2949 |
nextval = (unsigned long)mod->module_init+mod->init_text_size; |
22a8bdeb5 whitespace fixes:... |
2950 |
else |
1da177e4c Linux-2.6.12-rc2 |
2951 |
nextval = (unsigned long)mod->module_core+mod->core_text_size; |
25985edce Fix common misspe... |
2952 |
/* Scan for closest preceding symbol, and next symbol. (ELF |
22a8bdeb5 whitespace fixes:... |
2953 |
starts real symbols at 1). */ |
1da177e4c Linux-2.6.12-rc2 |
2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 |
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... |
2974 2975 2976 2977 |
if (size) *size = nextval - mod->symtab[best].st_value; if (offset) *offset = addr - mod->symtab[best].st_value; |
1da177e4c Linux-2.6.12-rc2 |
2978 2979 |
return mod->strtab + mod->symtab[best].st_name; } |
6dd06c9fb module: make modu... |
2980 2981 |
/* 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... |
2982 |
const char *module_address_lookup(unsigned long addr, |
6dd06c9fb module: make modu... |
2983 2984 2985 2986 |
unsigned long *size, unsigned long *offset, char **modname, char *namebuf) |
1da177e4c Linux-2.6.12-rc2 |
2987 2988 |
{ struct module *mod; |
cb2a52052 modules: de-mutex... |
2989 |
const char *ret = NULL; |
1da177e4c Linux-2.6.12-rc2 |
2990 |
|
cb2a52052 modules: de-mutex... |
2991 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
2992 |
list_for_each_entry_rcu(mod, &modules, list) { |
a06f6211e module: add withi... |
2993 2994 |
if (within_module_init(addr, mod) || within_module_core(addr, mod)) { |
ffc508919 [PATCH] Create ka... |
2995 2996 |
if (modname) *modname = mod->name; |
cb2a52052 modules: de-mutex... |
2997 2998 |
ret = get_ksymbol(mod, addr, size, offset); break; |
1da177e4c Linux-2.6.12-rc2 |
2999 3000 |
} } |
6dd06c9fb module: make modu... |
3001 3002 3003 3004 3005 |
/* Make a copy in here where it's safe */ if (ret) { strncpy(namebuf, ret, KSYM_NAME_LEN - 1); ret = namebuf; } |
cb2a52052 modules: de-mutex... |
3006 |
preempt_enable(); |
92dfc9dc7 fix "modules: mak... |
3007 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
3008 |
} |
9d65cb4a1 Fix race between ... |
3009 3010 3011 |
int lookup_module_symbol_name(unsigned long addr, char *symname) { struct module *mod; |
cb2a52052 modules: de-mutex... |
3012 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3013 |
list_for_each_entry_rcu(mod, &modules, list) { |
a06f6211e module: add withi... |
3014 3015 |
if (within_module_init(addr, mod) || within_module_core(addr, mod)) { |
9d65cb4a1 Fix race between ... |
3016 3017 3018 3019 3020 |
const char *sym; sym = get_ksymbol(mod, addr, NULL, NULL); if (!sym) goto out; |
9281acea6 kallsyms: make KS... |
3021 |
strlcpy(symname, sym, KSYM_NAME_LEN); |
cb2a52052 modules: de-mutex... |
3022 |
preempt_enable(); |
9d65cb4a1 Fix race between ... |
3023 3024 3025 3026 |
return 0; } } out: |
cb2a52052 modules: de-mutex... |
3027 |
preempt_enable(); |
9d65cb4a1 Fix race between ... |
3028 3029 |
return -ERANGE; } |
a5c43dae7 Fix race between ... |
3030 3031 3032 3033 |
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... |
3034 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3035 |
list_for_each_entry_rcu(mod, &modules, list) { |
a06f6211e module: add withi... |
3036 3037 |
if (within_module_init(addr, mod) || within_module_core(addr, mod)) { |
a5c43dae7 Fix race between ... |
3038 3039 3040 3041 3042 3043 |
const char *sym; sym = get_ksymbol(mod, addr, size, offset); if (!sym) goto out; if (modname) |
9281acea6 kallsyms: make KS... |
3044 |
strlcpy(modname, mod->name, MODULE_NAME_LEN); |
a5c43dae7 Fix race between ... |
3045 |
if (name) |
9281acea6 kallsyms: make KS... |
3046 |
strlcpy(name, sym, KSYM_NAME_LEN); |
cb2a52052 modules: de-mutex... |
3047 |
preempt_enable(); |
a5c43dae7 Fix race between ... |
3048 3049 3050 3051 |
return 0; } } out: |
cb2a52052 modules: de-mutex... |
3052 |
preempt_enable(); |
a5c43dae7 Fix race between ... |
3053 3054 |
return -ERANGE; } |
ea07890a6 Fix race between ... |
3055 3056 |
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 |
3057 3058 |
{ struct module *mod; |
cb2a52052 modules: de-mutex... |
3059 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3060 |
list_for_each_entry_rcu(mod, &modules, list) { |
1da177e4c Linux-2.6.12-rc2 |
3061 3062 3063 |
if (symnum < mod->num_symtab) { *value = mod->symtab[symnum].st_value; *type = mod->symtab[symnum].st_info; |
098c5eea0 [PATCH] null-term... |
3064 |
strlcpy(name, mod->strtab + mod->symtab[symnum].st_name, |
9281acea6 kallsyms: make KS... |
3065 3066 |
KSYM_NAME_LEN); strlcpy(module_name, mod->name, MODULE_NAME_LEN); |
ca4787b77 kernel/module.c: ... |
3067 |
*exported = is_exported(name, *value, mod); |
cb2a52052 modules: de-mutex... |
3068 |
preempt_enable(); |
ea07890a6 Fix race between ... |
3069 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
3070 3071 3072 |
} symnum -= mod->num_symtab; } |
cb2a52052 modules: de-mutex... |
3073 |
preempt_enable(); |
ea07890a6 Fix race between ... |
3074 |
return -ERANGE; |
1da177e4c Linux-2.6.12-rc2 |
3075 3076 3077 3078 3079 3080 3081 |
} 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... |
3082 3083 |
if (strcmp(name, mod->strtab+mod->symtab[i].st_name) == 0 && mod->symtab[i].st_info != 'U') |
1da177e4c Linux-2.6.12-rc2 |
3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 |
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... |
3096 |
preempt_disable(); |
1da177e4c Linux-2.6.12-rc2 |
3097 3098 3099 3100 3101 3102 |
if ((colon = strchr(name, ':')) != NULL) { *colon = '\0'; if ((mod = find_module(name)) != NULL) ret = mod_find_symname(mod, colon+1); *colon = ':'; } else { |
d72b37513 Remove stop_machi... |
3103 |
list_for_each_entry_rcu(mod, &modules, list) |
1da177e4c Linux-2.6.12-rc2 |
3104 3105 3106 |
if ((ret = mod_find_symname(mod, name)) != 0) break; } |
cb2a52052 modules: de-mutex... |
3107 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
3108 3109 |
return ret; } |
75a66614d Ksplice: Add func... |
3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 |
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) { 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 |
3129 |
#endif /* CONFIG_KALLSYMS */ |
21aa9280b debug: show being... |
3130 |
static char *module_flags(struct module *mod, char *buf) |
fa3ba2e81 [PATCH] fix Modul... |
3131 3132 |
{ int bx = 0; |
21aa9280b debug: show being... |
3133 3134 3135 |
if (mod->taints || mod->state == MODULE_STATE_GOING || mod->state == MODULE_STATE_COMING) { |
fa3ba2e81 [PATCH] fix Modul... |
3136 |
buf[bx++] = '('; |
25ddbb18a Make the taint fl... |
3137 |
if (mod->taints & (1 << TAINT_PROPRIETARY_MODULE)) |
fa3ba2e81 [PATCH] fix Modul... |
3138 |
buf[bx++] = 'P'; |
2449b8ba0 module,bug: Add T... |
3139 3140 |
else if (mod->taints & (1 << TAINT_OOT_MODULE)) buf[bx++] = 'O'; |
25ddbb18a Make the taint fl... |
3141 |
if (mod->taints & (1 << TAINT_FORCED_MODULE)) |
fa3ba2e81 [PATCH] fix Modul... |
3142 |
buf[bx++] = 'F'; |
26e9a3977 Merge git://git.k... |
3143 |
if (mod->taints & (1 << TAINT_CRAP)) |
061b1bd39 Staging: add TAIN... |
3144 |
buf[bx++] = 'C'; |
fa3ba2e81 [PATCH] fix Modul... |
3145 3146 3147 3148 3149 |
/* * TAINT_FORCED_RMMOD: could be added. * TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't * apply to modules. */ |
21aa9280b debug: show being... |
3150 3151 3152 3153 3154 3155 3156 |
/* 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... |
3157 3158 3159 3160 3161 3162 |
buf[bx++] = ')'; } buf[bx] = '\0'; return buf; } |
3b5d5c6b0 proc: move /proc/... |
3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 |
#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 |
3180 3181 3182 |
static int m_show(struct seq_file *m, void *p) { struct module *mod = list_entry(p, struct module, list); |
fa3ba2e81 [PATCH] fix Modul... |
3183 |
char buf[8]; |
2f0f2a334 module: turn long... |
3184 |
seq_printf(m, "%s %u", |
1da177e4c Linux-2.6.12-rc2 |
3185 3186 3187 3188 3189 3190 3191 3192 3193 |
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... |
3194 |
seq_printf(m, " 0x%pK", mod->module_core); |
1da177e4c Linux-2.6.12-rc2 |
3195 |
|
fa3ba2e81 [PATCH] fix Modul... |
3196 3197 |
/* Taints info */ if (mod->taints) |
21aa9280b debug: show being... |
3198 |
seq_printf(m, " %s", module_flags(mod, buf)); |
fa3ba2e81 [PATCH] fix Modul... |
3199 |
|
1da177e4c Linux-2.6.12-rc2 |
3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 |
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/... |
3210 |
static const struct seq_operations modules_op = { |
1da177e4c Linux-2.6.12-rc2 |
3211 3212 3213 3214 3215 |
.start = m_start, .next = m_next, .stop = m_stop, .show = m_show }; |
3b5d5c6b0 proc: move /proc/... |
3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 |
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 |
3235 3236 3237 |
/* 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 |
3238 3239 |
const struct exception_table_entry *e = NULL; struct module *mod; |
24da1cbff modules: remove m... |
3240 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
3241 |
list_for_each_entry_rcu(mod, &modules, list) { |
1da177e4c Linux-2.6.12-rc2 |
3242 3243 |
if (mod->num_exentries == 0) continue; |
22a8bdeb5 whitespace fixes:... |
3244 |
|
1da177e4c Linux-2.6.12-rc2 |
3245 3246 3247 3248 3249 3250 |
e = search_extable(mod->extable, mod->extable + mod->num_exentries - 1, addr); if (e) break; } |
24da1cbff modules: remove m... |
3251 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
3252 3253 |
/* Now, if we found one, we are running inside it now, hence |
22a8bdeb5 whitespace fixes:... |
3254 |
we cannot unload the module, hence no refcnt needed. */ |
1da177e4c Linux-2.6.12-rc2 |
3255 3256 |
return e; } |
4d435f9d8 [PATCH] lockdep: ... |
3257 |
/* |
e610499e2 module: __module_... |
3258 3259 3260 3261 3262 |
* 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: ... |
3263 |
*/ |
e610499e2 module: __module_... |
3264 |
bool is_module_address(unsigned long addr) |
4d435f9d8 [PATCH] lockdep: ... |
3265 |
{ |
e610499e2 module: __module_... |
3266 |
bool ret; |
4d435f9d8 [PATCH] lockdep: ... |
3267 |
|
24da1cbff modules: remove m... |
3268 |
preempt_disable(); |
e610499e2 module: __module_... |
3269 |
ret = __module_address(addr) != NULL; |
24da1cbff modules: remove m... |
3270 |
preempt_enable(); |
4d435f9d8 [PATCH] lockdep: ... |
3271 |
|
e610499e2 module: __module_... |
3272 |
return ret; |
4d435f9d8 [PATCH] lockdep: ... |
3273 |
} |
e610499e2 module: __module_... |
3274 3275 3276 3277 3278 3279 3280 |
/* * __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... |
3281 |
struct module *__module_address(unsigned long addr) |
1da177e4c Linux-2.6.12-rc2 |
3282 3283 |
{ struct module *mod; |
3a642e99b modules: Take a s... |
3284 3285 |
if (addr < module_addr_min || addr > module_addr_max) return NULL; |
d72b37513 Remove stop_machi... |
3286 |
list_for_each_entry_rcu(mod, &modules, list) |
e610499e2 module: __module_... |
3287 3288 |
if (within_module_core(addr, mod) || within_module_init(addr, mod)) |
1da177e4c Linux-2.6.12-rc2 |
3289 3290 3291 |
return mod; return NULL; } |
c6b378019 module: Export sy... |
3292 |
EXPORT_SYMBOL_GPL(__module_address); |
1da177e4c Linux-2.6.12-rc2 |
3293 |
|
e610499e2 module: __module_... |
3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 |
/* * 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... |
3331 |
EXPORT_SYMBOL_GPL(__module_text_address); |
e610499e2 module: __module_... |
3332 |
|
1da177e4c Linux-2.6.12-rc2 |
3333 3334 3335 3336 |
/* Don't grab lock, we're oopsing. */ void print_modules(void) { struct module *mod; |
2bc2d61a9 [PATCH] list modu... |
3337 |
char buf[8]; |
1da177e4c Linux-2.6.12-rc2 |
3338 |
|
b231125af printk: add KERN_... |
3339 |
printk(KERN_DEFAULT "Modules linked in:"); |
d72b37513 Remove stop_machi... |
3340 3341 3342 |
/* Most callers should already have preempt disabled, but make sure */ preempt_disable(); list_for_each_entry_rcu(mod, &modules, list) |
21aa9280b debug: show being... |
3343 |
printk(" %s%s", mod->name, module_flags(mod, buf)); |
d72b37513 Remove stop_machi... |
3344 |
preempt_enable(); |
e14af7eeb debug: track and ... |
3345 3346 |
if (last_unloaded_module[0]) printk(" [last unloaded: %s]", last_unloaded_module); |
1da177e4c Linux-2.6.12-rc2 |
3347 3348 3349 |
printk(" "); } |
1da177e4c Linux-2.6.12-rc2 |
3350 |
#ifdef CONFIG_MODVERSIONS |
8c8ef42ae module: include o... |
3351 3352 3353 3354 3355 3356 |
/* 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 ... |
3357 |
struct tracepoint * const *tp) |
8c8ef42ae module: include o... |
3358 3359 3360 |
{ } EXPORT_SYMBOL(module_layout); |
1da177e4c Linux-2.6.12-rc2 |
3361 |
#endif |