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kernel/module.c
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/* |
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Copyright (C) 2002 Richard Henderson Copyright (C) 2001 Rusty Russell, 2002 Rusty Russell IBM. 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/module.h> #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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|
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#define CREATE_TRACE_POINTS #include <trace/events/module.h> EXPORT_TRACEPOINT_SYMBOL(module_get); |
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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 /* 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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/* List of modules, protected by module_mutex or preempt_disable |
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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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/* 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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/* Bounds of module allocation, for speeding __module_address */ |
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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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/* 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. */ static unsigned int find_sec(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, const char *secstrings, const char *name) { unsigned int i; for (i = 1; i < hdr->e_shnum; i++) /* Alloc bit cleared means "ignore it." */ if ((sechdrs[i].sh_flags & SHF_ALLOC) && strcmp(secstrings+sechdrs[i].sh_name, name) == 0) return i; return 0; } |
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/* Find a module section, or NULL. */ static void *section_addr(Elf_Ehdr *hdr, Elf_Shdr *shdrs, const char *secstrings, const char *name) { /* Section 0 has sh_addr 0. */ return (void *)shdrs[find_sec(hdr, shdrs, secstrings, name)].sh_addr; } /* Find a module section, or NULL. Fill in number of "objects" in section. */ static void *section_objs(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, const char *secstrings, const char *name, size_t object_size, unsigned int *num) { unsigned int sec = find_sec(hdr, sechdrs, secstrings, name); /* Section 0 has sh_addr 0 and sh_size 0. */ *num = sechdrs[sec].sh_size / object_size; return (void *)sechdrs[sec].sh_addr; } |
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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 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, unsigned int symnum, void *data), void *data) |
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{ |
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unsigned int i, j; |
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|
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for (j = 0; j < arrsize; j++) { for (i = 0; i < arr[j].stop - arr[j].start; i++) if (fn(&arr[j], owner, i, 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(bool (*fn)(const struct symsearch *arr, struct module *owner, unsigned int symnum, void *data), void *data) |
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{ struct module *mod; |
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const struct symsearch arr[] = { { __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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if (each_symbol_in_section(arr, ARRAY_SIZE(arr), NULL, fn, data)) return true; |
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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); |
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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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}; static bool find_symbol_in_section(const struct symsearch *syms, struct module *owner, unsigned int symnum, void *data) { struct find_symbol_arg *fsa = data; if (strcmp(syms->start[symnum].name, fsa->name) != 0) return false; 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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/* Find a symbol and return it, along with, (optional) crc and * (optional) module which owns it */ |
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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; if (each_symbol(find_symbol_in_section, &fsa)) { 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 void *percpu_modalloc(unsigned long size, unsigned long align, const char *name) { void *ptr; if (align > PAGE_SIZE) { printk(KERN_WARNING "%s: per-cpu alignment %li > %li ", name, align, PAGE_SIZE); align = PAGE_SIZE; } |
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ptr = __alloc_reserved_percpu(size, align); |
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if (!ptr) printk(KERN_WARNING "Could not allocate %lu bytes percpu data ", size); return ptr; } static void percpu_modfree(void *freeme) { free_percpu(freeme); } |
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static unsigned int find_pcpusec(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, const char *secstrings) { return find_sec(hdr, sechdrs, secstrings, ".data.percpu"); } static void percpu_modcopy(void *pcpudest, const void *from, unsigned long size) { int cpu; for_each_possible_cpu(cpu) memcpy(pcpudest + per_cpu_offset(cpu), from, size); } |
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#else /* ... !CONFIG_SMP */ |
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static inline void *percpu_modalloc(unsigned long size, unsigned long align, const char *name) |
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{ return NULL; } static inline void percpu_modfree(void *pcpuptr) { BUG(); } static inline unsigned int find_pcpusec(Elf_Ehdr *hdr, Elf_Shdr *sechdrs, const char *secstrings) { return 0; } static inline void percpu_modcopy(void *pcpudst, const void *src, unsigned long size) { /* pcpusec should be 0, and size of that section should be 0. */ BUG_ON(size != 0); } |
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#endif /* CONFIG_SMP */ |
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#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, \ struct module *mod, char *buffer) \ { \ return sprintf(buffer, "%s ", mod->field); \ } \ static int modinfo_##field##_exists(struct module *mod) \ { \ return mod->field != NULL; \ } \ static void free_modinfo_##field(struct module *mod) \ { \ |
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kfree(mod->field); \ mod->field = NULL; \ |
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} \ static struct module_attribute modinfo_##field = { \ |
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.attr = { .name = __stringify(field), .mode = 0444 }, \ |
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.show = show_modinfo_##field, \ .setup = setup_modinfo_##field, \ .test = modinfo_##field##_exists, \ .free = free_modinfo_##field, \ }; MODINFO_ATTR(version); MODINFO_ATTR(srcversion); |
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static char last_unloaded_module[MODULE_NAME_LEN+1]; |
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#ifdef CONFIG_MODULE_UNLOAD |
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/* Init the unload section of the module. */ static void module_unload_init(struct module *mod) { |
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int cpu; |
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INIT_LIST_HEAD(&mod->modules_which_use_me); |
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for_each_possible_cpu(cpu) local_set(__module_ref_addr(mod, cpu), 0); |
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/* Hold reference count during initialization. */ |
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local_set(__module_ref_addr(mod, raw_smp_processor_id()), 1); |
1da177e4c Linux-2.6.12-rc2 |
467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 |
/* Backwards compatibility macros put refcount during init. */ mod->waiter = current; } /* modules using other modules */ struct module_use { struct list_head list; struct module *module_which_uses; }; /* Does a already use b? */ static int already_uses(struct module *a, struct module *b) { struct module_use *use; list_for_each_entry(use, &b->modules_which_use_me, list) { if (use->module_which_uses == a) { DEBUGP("%s uses %s! ", a->name, b->name); return 1; } } DEBUGP("%s does not use %s! ", a->name, b->name); return 0; } /* Module a uses b */ |
c6b378019 module: Export sy... |
496 |
int use_module(struct module *a, struct module *b) |
1da177e4c Linux-2.6.12-rc2 |
497 498 |
{ struct module_use *use; |
c9a3ba55b module: wait for ... |
499 |
int no_warn, err; |
270a6c4ca /sys/modules/*/ho... |
500 |
|
1da177e4c Linux-2.6.12-rc2 |
501 |
if (b == NULL || already_uses(a, b)) return 1; |
c9a3ba55b module: wait for ... |
502 503 504 505 506 507 508 509 510 511 512 513 |
/* If we're interrupted or time out, we fail. */ if (wait_event_interruptible_timeout( module_wq, (err = strong_try_module_get(b)) != -EBUSY, 30 * HZ) <= 0) { printk("%s: gave up waiting for init of module %s. ", a->name, b->name); return 0; } /* If strong_try_module_get() returned a different error, we fail. */ if (err) |
1da177e4c Linux-2.6.12-rc2 |
514 515 516 517 518 519 520 521 522 523 524 525 526 527 |
return 0; DEBUGP("Allocating new usage for %s. ", a->name); use = kmalloc(sizeof(*use), GFP_ATOMIC); if (!use) { printk("%s: out of memory loading ", a->name); module_put(b); return 0; } use->module_which_uses = a; list_add(&use->list, &b->modules_which_use_me); |
270a6c4ca /sys/modules/*/ho... |
528 |
no_warn = sysfs_create_link(b->holders_dir, &a->mkobj.kobj, a->name); |
1da177e4c Linux-2.6.12-rc2 |
529 530 |
return 1; } |
c6b378019 module: Export sy... |
531 |
EXPORT_SYMBOL_GPL(use_module); |
1da177e4c Linux-2.6.12-rc2 |
532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 |
/* Clear the unload stuff of the module. */ static void module_unload_free(struct module *mod) { struct module *i; list_for_each_entry(i, &modules, list) { struct module_use *use; list_for_each_entry(use, &i->modules_which_use_me, list) { if (use->module_which_uses == mod) { DEBUGP("%s unusing %s ", mod->name, i->name); module_put(i); list_del(&use->list); kfree(use); |
270a6c4ca /sys/modules/*/ho... |
548 |
sysfs_remove_link(i->holders_dir, mod->name); |
1da177e4c Linux-2.6.12-rc2 |
549 550 551 552 553 554 555 556 |
/* There can be at most one match. */ break; } } } } #ifdef CONFIG_MODULE_FORCE_UNLOAD |
fb1697933 [PATCH] modules: ... |
557 |
static inline int try_force_unload(unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
558 559 560 |
{ int ret = (flags & O_TRUNC); if (ret) |
fb1697933 [PATCH] modules: ... |
561 |
add_taint(TAINT_FORCED_RMMOD); |
1da177e4c Linux-2.6.12-rc2 |
562 563 564 |
return ret; } #else |
fb1697933 [PATCH] modules: ... |
565 |
static inline int try_force_unload(unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 |
{ 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... |
582 583 |
/* If it's not unused, quit unless we're forcing. */ if (module_refcount(sref->mod) != 0) { |
fb1697933 [PATCH] modules: ... |
584 |
if (!(*sref->forced = try_force_unload(sref->flags))) |
1da177e4c Linux-2.6.12-rc2 |
585 586 587 588 589 590 591 592 593 594 |
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... |
595 596 |
if (flags & O_NONBLOCK) { struct stopref sref = { mod, flags, forced }; |
1da177e4c Linux-2.6.12-rc2 |
597 |
|
9b1a4d383 stop_machine: Wea... |
598 |
return stop_machine(__try_stop_module, &sref, NULL); |
da39ba5e1 module: don't use... |
599 600 601 602 603 604 |
} 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 |
605 606 607 608 |
} unsigned int module_refcount(struct module *mod) { |
720eba31f modules: Use a be... |
609 610 |
unsigned int total = 0; int cpu; |
1da177e4c Linux-2.6.12-rc2 |
611 |
|
720eba31f modules: Use a be... |
612 613 |
for_each_possible_cpu(cpu) total += local_read(__module_ref_addr(mod, cpu)); |
1da177e4c Linux-2.6.12-rc2 |
614 615 616 617 618 619 620 621 622 |
return total; } 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... |
623 |
/* Since we might sleep for some time, release the mutex first */ |
6389a3851 [PATCH] kernel/mo... |
624 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
625 626 627 628 629 630 631 632 633 |
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... |
634 |
mutex_lock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
635 |
} |
17da2bd90 [CVE-2009-0029] S... |
636 637 |
SYSCALL_DEFINE2(delete_module, const char __user *, name_user, unsigned int, flags) |
1da177e4c Linux-2.6.12-rc2 |
638 639 |
{ struct module *mod; |
dfff0a067 Revert "Driver co... |
640 |
char name[MODULE_NAME_LEN]; |
1da177e4c Linux-2.6.12-rc2 |
641 |
int ret, forced = 0; |
3d43321b7 modules: sysctl t... |
642 |
if (!capable(CAP_SYS_MODULE) || modules_disabled) |
dfff0a067 Revert "Driver co... |
643 644 645 646 647 |
return -EPERM; if (strncpy_from_user(name, name_user, MODULE_NAME_LEN-1) < 0) return -EFAULT; name[MODULE_NAME_LEN-1] = '\0'; |
9e01892c4 module: convert t... |
648 649 650 651 652 653 654 655 656 657 |
/* Create stop_machine threads since free_module relies on * a non-failing stop_machine call. */ ret = stop_machine_create(); if (ret) return ret; if (mutex_lock_interruptible(&module_mutex) != 0) { ret = -EINTR; goto out_stop; } |
1da177e4c Linux-2.6.12-rc2 |
658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 |
mod = find_module(name); if (!mod) { ret = -ENOENT; goto out; } if (!list_empty(&mod->modules_which_use_me)) { /* 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... |
682 |
if (mod->init && !mod->exit) { |
fb1697933 [PATCH] modules: ... |
683 |
forced = try_force_unload(flags); |
1da177e4c Linux-2.6.12-rc2 |
684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 |
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... |
702 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
703 |
/* Final destruction now noone is using it. */ |
df4b565e1 module: add MODUL... |
704 |
if (mod->exit != NULL) |
1da177e4c Linux-2.6.12-rc2 |
705 |
mod->exit(); |
df4b565e1 module: add MODUL... |
706 707 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); |
22a9d6456 async: Asynchrono... |
708 |
async_synchronize_full(); |
df4b565e1 module: add MODUL... |
709 |
mutex_lock(&module_mutex); |
e14af7eeb debug: track and ... |
710 |
/* Store the name of the last unloaded module for diagnostic purposes */ |
efa5345e3 module: Fix gratu... |
711 |
strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module)); |
e9d376f0f dynamic debug: co... |
712 |
ddebug_remove_module(mod->name); |
1da177e4c Linux-2.6.12-rc2 |
713 714 715 |
free_module(mod); out: |
6389a3851 [PATCH] kernel/mo... |
716 |
mutex_unlock(&module_mutex); |
9e01892c4 module: convert t... |
717 718 |
out_stop: stop_machine_destroy(); |
1da177e4c Linux-2.6.12-rc2 |
719 720 |
return ret; } |
d1e99d7ae module: fix warni... |
721 |
static inline void print_unload_info(struct seq_file *m, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
722 723 724 725 726 727 728 729 730 731 732 733 |
{ 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. */ list_for_each_entry(use, &mod->modules_which_use_me, list) { printed_something = 1; seq_printf(m, "%s,", use->module_which_uses->name); } |
1da177e4c Linux-2.6.12-rc2 |
734 735 736 737 738 739 740 741 742 743 744 745 |
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 |
746 |
|
24da1cbff modules: remove m... |
747 |
preempt_disable(); |
414fd31b2 module: Make find... |
748 |
if (!find_symbol(symbol, &owner, NULL, true, false)) |
1da177e4c Linux-2.6.12-rc2 |
749 750 |
BUG(); module_put(owner); |
24da1cbff modules: remove m... |
751 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
752 753 |
} EXPORT_SYMBOL(__symbol_put); |
7d1d16e41 module: fix BUG_O... |
754 |
/* Note this assumes addr is a function, which it currently always is. */ |
1da177e4c Linux-2.6.12-rc2 |
755 756 |
void symbol_put_addr(void *addr) { |
5e3766138 [PATCH] symbol_pu... |
757 |
struct module *modaddr; |
7d1d16e41 module: fix BUG_O... |
758 |
unsigned long a = (unsigned long)dereference_function_descriptor(addr); |
1da177e4c Linux-2.6.12-rc2 |
759 |
|
7d1d16e41 module: fix BUG_O... |
760 |
if (core_kernel_text(a)) |
5e3766138 [PATCH] symbol_pu... |
761 |
return; |
1da177e4c Linux-2.6.12-rc2 |
762 |
|
a6e6abd57 module: remove mo... |
763 764 |
/* 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... |
765 |
modaddr = __module_text_address(a); |
a6e6abd57 module: remove mo... |
766 |
BUG_ON(!modaddr); |
5e3766138 [PATCH] symbol_pu... |
767 |
module_put(modaddr); |
1da177e4c Linux-2.6.12-rc2 |
768 769 770 771 772 773 |
} EXPORT_SYMBOL_GPL(symbol_put_addr); static ssize_t show_refcnt(struct module_attribute *mattr, struct module *mod, char *buffer) { |
256e2fdf0 Fix Off-by-one in... |
774 775 |
return sprintf(buffer, "%u ", module_refcount(mod)); |
1da177e4c Linux-2.6.12-rc2 |
776 777 778 |
} static struct module_attribute refcnt = { |
7b595756e sysfs: kill unnec... |
779 |
.attr = { .name = "refcnt", .mode = 0444 }, |
1da177e4c Linux-2.6.12-rc2 |
780 781 |
.show = show_refcnt, }; |
f6a570333 [PATCH] severing ... |
782 783 784 785 |
void module_put(struct module *module) { if (module) { unsigned int cpu = get_cpu(); |
720eba31f modules: Use a be... |
786 |
local_dec(__module_ref_addr(module, cpu)); |
7ead8b831 tracing/events: A... |
787 788 |
trace_module_put(module, _RET_IP_, local_read(__module_ref_addr(module, cpu))); |
f6a570333 [PATCH] severing ... |
789 790 791 792 793 794 795 |
/* Maybe they're waiting for us to drop reference? */ if (unlikely(!module_is_live(module))) wake_up_process(module->waiter); put_cpu(); } } EXPORT_SYMBOL(module_put); |
1da177e4c Linux-2.6.12-rc2 |
796 |
#else /* !CONFIG_MODULE_UNLOAD */ |
d1e99d7ae module: fix warni... |
797 |
static inline void print_unload_info(struct seq_file *m, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
798 799 800 801 802 803 804 805 |
{ /* We don't know the usage count, or what modules are using. */ seq_printf(m, " - -"); } static inline void module_unload_free(struct module *mod) { } |
c6b378019 module: Export sy... |
806 |
int use_module(struct module *a, struct module *b) |
1da177e4c Linux-2.6.12-rc2 |
807 |
{ |
c9a3ba55b module: wait for ... |
808 |
return strong_try_module_get(b) == 0; |
1da177e4c Linux-2.6.12-rc2 |
809 |
} |
c6b378019 module: Export sy... |
810 |
EXPORT_SYMBOL_GPL(use_module); |
1da177e4c Linux-2.6.12-rc2 |
811 812 813 814 815 |
static inline void module_unload_init(struct module *mod) { } #endif /* CONFIG_MODULE_UNLOAD */ |
1f71740ab Driver core: show... |
816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 |
static ssize_t show_initstate(struct module_attribute *mattr, struct module *mod, char *buffer) { const char *state = "unknown"; switch (mod->state) { 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... |
837 |
.attr = { .name = "initstate", .mode = 0444 }, |
1f71740ab Driver core: show... |
838 839 |
.show = show_initstate, }; |
03e88ae1b [PATCH] fix modul... |
840 841 842 |
static struct module_attribute *modinfo_attrs[] = { &modinfo_version, &modinfo_srcversion, |
1f71740ab Driver core: show... |
843 |
&initstate, |
03e88ae1b [PATCH] fix modul... |
844 845 846 847 848 |
#ifdef CONFIG_MODULE_UNLOAD &refcnt, #endif NULL, }; |
1da177e4c Linux-2.6.12-rc2 |
849 |
static const char vermagic[] = VERMAGIC_STRING; |
c6e665c8f module: clarify t... |
850 |
static int try_to_force_load(struct module *mod, const char *reason) |
826e4506a Make forced modul... |
851 852 |
{ #ifdef CONFIG_MODULE_FORCE_LOAD |
25ddbb18a Make the taint fl... |
853 |
if (!test_taint(TAINT_FORCED_MODULE)) |
c6e665c8f module: clarify t... |
854 855 856 |
printk(KERN_WARNING "%s: %s: kernel tainted. ", mod->name, reason); |
826e4506a Make forced modul... |
857 858 859 860 861 862 |
add_taint_module(mod, TAINT_FORCED_MODULE); return 0; #else return -ENOEXEC; #endif } |
1da177e4c Linux-2.6.12-rc2 |
863 |
#ifdef CONFIG_MODVERSIONS |
d4703aefd module: handle pp... |
864 865 866 867 868 869 870 871 872 873 |
/* 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 |
874 875 876 877 |
static int check_version(Elf_Shdr *sechdrs, unsigned int versindex, const char *symname, struct module *mod, |
d4703aefd module: handle pp... |
878 879 |
const unsigned long *crc, const struct module *crc_owner) |
1da177e4c Linux-2.6.12-rc2 |
880 881 882 883 884 885 886 |
{ 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... |
887 888 889 |
/* 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 |
890 891 892 893 894 895 896 |
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... |
897 |
if (versions[i].crc == maybe_relocated(*crc, crc_owner)) |
1da177e4c Linux-2.6.12-rc2 |
898 |
return 1; |
1da177e4c Linux-2.6.12-rc2 |
899 900 |
DEBUGP("Found checksum %lX vs module %lX ", |
d4703aefd module: handle pp... |
901 |
maybe_relocated(*crc, crc_owner), versions[i].crc); |
826e4506a Make forced modul... |
902 |
goto bad_version; |
1da177e4c Linux-2.6.12-rc2 |
903 |
} |
826e4506a Make forced modul... |
904 |
|
a5dd69707 module: be more p... |
905 906 907 908 |
printk(KERN_WARNING "%s: no symbol version for %s ", mod->name, symname); return 0; |
826e4506a Make forced modul... |
909 910 911 912 913 914 |
bad_version: printk("%s: disagrees about version of symbol %s ", mod->name, symname); return 0; |
1da177e4c Linux-2.6.12-rc2 |
915 916 917 918 919 920 921 |
} 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 |
922 |
|
6560dc160 module: use MODUL... |
923 924 |
if (!find_symbol(MODULE_SYMBOL_PREFIX "module_layout", NULL, &crc, true, false)) |
1da177e4c Linux-2.6.12-rc2 |
925 |
BUG(); |
d4703aefd module: handle pp... |
926 927 |
return check_version(sechdrs, versindex, "module_layout", mod, crc, NULL); |
1da177e4c Linux-2.6.12-rc2 |
928 |
} |
91e37a793 module: don't ign... |
929 930 931 |
/* 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 |
932 |
{ |
91e37a793 module: don't ign... |
933 934 935 936 |
if (has_crcs) { amagic += strcspn(amagic, " "); bmagic += strcspn(bmagic, " "); } |
1da177e4c Linux-2.6.12-rc2 |
937 938 939 940 941 942 943 |
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... |
944 945 |
const unsigned long *crc, const struct module *crc_owner) |
1da177e4c Linux-2.6.12-rc2 |
946 947 948 949 950 951 952 953 954 955 |
{ return 1; } static inline int check_modstruct_version(Elf_Shdr *sechdrs, unsigned int versindex, struct module *mod) { return 1; } |
91e37a793 module: don't ign... |
956 957 |
static inline int same_magic(const char *amagic, const char *bmagic, bool has_crcs) |
1da177e4c Linux-2.6.12-rc2 |
958 959 960 961 962 963 964 |
{ return strcmp(amagic, bmagic) == 0; } #endif /* CONFIG_MODVERSIONS */ /* Resolve a symbol for this module. I.e. if we find one, record usage. Must be holding module_mutex. */ |
414fd31b2 module: Make find... |
965 966 967 968 |
static const struct kernel_symbol *resolve_symbol(Elf_Shdr *sechdrs, unsigned int versindex, const char *name, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
969 970 |
{ struct module *owner; |
414fd31b2 module: Make find... |
971 |
const struct kernel_symbol *sym; |
1da177e4c Linux-2.6.12-rc2 |
972 |
const unsigned long *crc; |
414fd31b2 module: Make find... |
973 |
sym = find_symbol(name, &owner, &crc, |
25ddbb18a Make the taint fl... |
974 |
!(mod->taints & (1 << TAINT_PROPRIETARY_MODULE)), true); |
414fd31b2 module: Make find... |
975 976 977 |
/* use_module can fail due to OOM, or module initialization or unloading */ if (sym) { |
d4703aefd module: handle pp... |
978 979 |
if (!check_version(sechdrs, versindex, name, mod, crc, owner) || !use_module(mod, owner)) |
414fd31b2 module: Make find... |
980 |
sym = NULL; |
1da177e4c Linux-2.6.12-rc2 |
981 |
} |
414fd31b2 module: Make find... |
982 |
return sym; |
1da177e4c Linux-2.6.12-rc2 |
983 |
} |
1da177e4c Linux-2.6.12-rc2 |
984 985 986 987 |
/* * /sys/module/foo/sections stuff * J. Corbet <corbet@lwn.net> */ |
120fc3d77 modules: do not t... |
988 |
#if defined(CONFIG_KALLSYMS) && defined(CONFIG_SYSFS) |
10b465aaf modules: Skip emp... |
989 990 991 992 993 |
static inline bool sect_empty(const Elf_Shdr *sect) { return !(sect->sh_flags & SHF_ALLOC) || sect->sh_size == 0; } |
a58730c42 module: make modu... |
994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 |
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 |
1007 1008 1009 1010 1011 1012 1013 1014 |
static ssize_t module_sect_show(struct module_attribute *mattr, struct module *mod, char *buf) { struct module_sect_attr *sattr = container_of(mattr, struct module_sect_attr, mattr); return sprintf(buf, "0x%lx ", sattr->address); } |
04b1db9fd [PATCH] /sys/modu... |
1015 1016 |
static void free_sect_attrs(struct module_sect_attrs *sect_attrs) { |
a58730c42 module: make modu... |
1017 |
unsigned int section; |
04b1db9fd [PATCH] /sys/modu... |
1018 1019 1020 1021 1022 |
for (section = 0; section < sect_attrs->nsections; section++) kfree(sect_attrs->attrs[section].name); kfree(sect_attrs); } |
1da177e4c Linux-2.6.12-rc2 |
1023 1024 1025 1026 1027 1028 1029 |
static void add_sect_attrs(struct module *mod, unsigned int nsect, char *secstrings, Elf_Shdr *sechdrs) { unsigned int nloaded = 0, i, size[2]; struct module_sect_attrs *sect_attrs; struct module_sect_attr *sattr; struct attribute **gattr; |
22a8bdeb5 whitespace fixes:... |
1030 |
|
1da177e4c Linux-2.6.12-rc2 |
1031 1032 |
/* Count loaded sections and allocate structures */ for (i = 0; i < nsect; i++) |
10b465aaf modules: Skip emp... |
1033 |
if (!sect_empty(&sechdrs[i])) |
1da177e4c Linux-2.6.12-rc2 |
1034 1035 1036 1037 1038 |
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... |
1039 1040 |
sect_attrs = kzalloc(size[0] + size[1], GFP_KERNEL); if (sect_attrs == NULL) |
1da177e4c Linux-2.6.12-rc2 |
1041 1042 1043 1044 1045 |
return; /* Setup section attributes. */ sect_attrs->grp.name = "sections"; sect_attrs->grp.attrs = (void *)sect_attrs + size[0]; |
04b1db9fd [PATCH] /sys/modu... |
1046 |
sect_attrs->nsections = 0; |
1da177e4c Linux-2.6.12-rc2 |
1047 1048 1049 |
sattr = §_attrs->attrs[0]; gattr = §_attrs->grp.attrs[0]; for (i = 0; i < nsect; i++) { |
10b465aaf modules: Skip emp... |
1050 |
if (sect_empty(&sechdrs[i])) |
35dead423 modules: don't ex... |
1051 |
continue; |
1da177e4c Linux-2.6.12-rc2 |
1052 |
sattr->address = sechdrs[i].sh_addr; |
04b1db9fd [PATCH] /sys/modu... |
1053 1054 1055 1056 1057 |
sattr->name = kstrdup(secstrings + sechdrs[i].sh_name, GFP_KERNEL); if (sattr->name == NULL) goto out; sect_attrs->nsections++; |
1da177e4c Linux-2.6.12-rc2 |
1058 1059 1060 |
sattr->mattr.show = module_sect_show; sattr->mattr.store = NULL; sattr->mattr.attr.name = sattr->name; |
1da177e4c Linux-2.6.12-rc2 |
1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 |
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... |
1072 |
free_sect_attrs(sect_attrs); |
1da177e4c Linux-2.6.12-rc2 |
1073 1074 1075 1076 1077 1078 1079 1080 1081 |
} 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... |
1082 |
free_sect_attrs(mod->sect_attrs); |
1da177e4c Linux-2.6.12-rc2 |
1083 1084 1085 |
mod->sect_attrs = NULL; } } |
6d7601338 Add /sys/module/n... |
1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 |
/* * /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]; }; static ssize_t module_notes_read(struct kobject *kobj, 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... |
1114 |
kobject_put(notes_attrs->dir); |
6d7601338 Add /sys/module/n... |
1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 |
} kfree(notes_attrs); } static void add_notes_attrs(struct module *mod, unsigned int nsect, char *secstrings, Elf_Shdr *sechdrs) { unsigned int notes, loaded, i; struct module_notes_attrs *notes_attrs; struct bin_attribute *nattr; |
ea6bff368 modules: Fix buil... |
1125 1126 1127 |
/* failed to create section attributes, so can't create notes */ if (!mod->sect_attrs) return; |
6d7601338 Add /sys/module/n... |
1128 1129 1130 |
/* Count notes sections and allocate structures. */ notes = 0; for (i = 0; i < nsect; i++) |
10b465aaf modules: Skip emp... |
1131 |
if (!sect_empty(&sechdrs[i]) && |
6d7601338 Add /sys/module/n... |
1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 |
(sechdrs[i].sh_type == SHT_NOTE)) ++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]; for (loaded = i = 0; i < nsect; ++i) { |
10b465aaf modules: Skip emp... |
1147 |
if (sect_empty(&sechdrs[i])) |
6d7601338 Add /sys/module/n... |
1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 |
continue; if (sechdrs[i].sh_type == SHT_NOTE) { nattr->attr.name = mod->sect_attrs->attrs[loaded].name; nattr->attr.mode = S_IRUGO; nattr->size = sechdrs[i].sh_size; nattr->private = (void *) sechdrs[i].sh_addr; nattr->read = module_notes_read; ++nattr; } ++loaded; } |
4ff6abff8 kobject: get rid ... |
1159 |
notes_attrs->dir = kobject_create_and_add("notes", &mod->mkobj.kobj); |
6d7601338 Add /sys/module/n... |
1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 |
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 |
1180 |
#else |
04b1db9fd [PATCH] /sys/modu... |
1181 |
|
1da177e4c Linux-2.6.12-rc2 |
1182 1183 1184 1185 1186 1187 1188 1189 |
static inline void add_sect_attrs(struct module *mod, unsigned int nsect, char *sectstrings, Elf_Shdr *sechdrs) { } static inline void remove_sect_attrs(struct module *mod) { } |
6d7601338 Add /sys/module/n... |
1190 1191 1192 1193 1194 1195 1196 1197 1198 |
static inline void add_notes_attrs(struct module *mod, unsigned int nsect, char *sectstrings, Elf_Shdr *sechdrs) { } static inline void remove_notes_attrs(struct module *mod) { } |
120fc3d77 modules: do not t... |
1199 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
1200 |
|
ef665c1a0 sysfs: fix build ... |
1201 1202 |
#ifdef CONFIG_SYSFS int module_add_modinfo_attrs(struct module *mod) |
c988d2b28 [PATCH] modules: ... |
1203 1204 |
{ struct module_attribute *attr; |
03e88ae1b [PATCH] fix modul... |
1205 |
struct module_attribute *temp_attr; |
c988d2b28 [PATCH] modules: ... |
1206 1207 |
int error = 0; int i; |
03e88ae1b [PATCH] fix modul... |
1208 1209 1210 1211 1212 1213 1214 |
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: ... |
1215 1216 |
for (i = 0; (attr = modinfo_attrs[i]) && !error; i++) { if (!attr->test || |
03e88ae1b [PATCH] fix modul... |
1217 1218 |
(attr->test && attr->test(mod))) { memcpy(temp_attr, attr, sizeof(*temp_attr)); |
03e88ae1b [PATCH] fix modul... |
1219 1220 1221 |
error = sysfs_create_file(&mod->mkobj.kobj,&temp_attr->attr); ++temp_attr; } |
c988d2b28 [PATCH] modules: ... |
1222 1223 1224 |
} return error; } |
ef665c1a0 sysfs: fix build ... |
1225 |
void module_remove_modinfo_attrs(struct module *mod) |
c988d2b28 [PATCH] modules: ... |
1226 1227 1228 |
{ struct module_attribute *attr; int i; |
03e88ae1b [PATCH] fix modul... |
1229 1230 1231 1232 |
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: ... |
1233 |
sysfs_remove_file(&mod->mkobj.kobj,&attr->attr); |
03e88ae1b [PATCH] fix modul... |
1234 1235 |
if (attr->free) attr->free(mod); |
c988d2b28 [PATCH] modules: ... |
1236 |
} |
03e88ae1b [PATCH] fix modul... |
1237 |
kfree(mod->modinfo_attrs); |
c988d2b28 [PATCH] modules: ... |
1238 |
} |
1da177e4c Linux-2.6.12-rc2 |
1239 |
|
ef665c1a0 sysfs: fix build ... |
1240 |
int mod_sysfs_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1241 1242 |
{ int err; |
6494a93d5 Module: check to ... |
1243 |
struct kobject *kobj; |
1da177e4c Linux-2.6.12-rc2 |
1244 |
|
823bccfc4 remove "struct su... |
1245 1246 1247 |
if (!module_sysfs_initialized) { printk(KERN_ERR "%s: module sysfs not initialized ", |
1cc5f7142 [PATCH] load_modu... |
1248 1249 1250 1251 |
mod->name); err = -EINVAL; goto out; } |
6494a93d5 Module: check to ... |
1252 1253 1254 1255 1256 1257 1258 1259 1260 |
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 |
1261 |
mod->mkobj.mod = mod; |
e17e0f51a Driver core: show... |
1262 |
|
ac3c8141f Kobject: convert ... |
1263 1264 1265 1266 1267 1268 |
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... |
1269 |
|
97c146ef0 sysfs: fix /sys/m... |
1270 |
/* delay uevent until full sysfs population */ |
270a6c4ca /sys/modules/*/ho... |
1271 1272 1273 |
out: return err; } |
ef665c1a0 sysfs: fix build ... |
1274 |
int mod_sysfs_setup(struct module *mod, |
270a6c4ca /sys/modules/*/ho... |
1275 1276 1277 1278 |
struct kernel_param *kparam, unsigned int num_params) { int err; |
4ff6abff8 kobject: get rid ... |
1279 |
mod->holders_dir = kobject_create_and_add("holders", &mod->mkobj.kobj); |
240936e18 mod_sysfs_setup()... |
1280 1281 |
if (!mod->holders_dir) { err = -ENOMEM; |
270a6c4ca /sys/modules/*/ho... |
1282 |
goto out_unreg; |
240936e18 mod_sysfs_setup()... |
1283 |
} |
270a6c4ca /sys/modules/*/ho... |
1284 |
|
1da177e4c Linux-2.6.12-rc2 |
1285 1286 |
err = module_param_sysfs_setup(mod, kparam, num_params); if (err) |
270a6c4ca /sys/modules/*/ho... |
1287 |
goto out_unreg_holders; |
1da177e4c Linux-2.6.12-rc2 |
1288 |
|
c988d2b28 [PATCH] modules: ... |
1289 1290 |
err = module_add_modinfo_attrs(mod); if (err) |
e17e0f51a Driver core: show... |
1291 |
goto out_unreg_param; |
c988d2b28 [PATCH] modules: ... |
1292 |
|
e17e0f51a Driver core: show... |
1293 |
kobject_uevent(&mod->mkobj.kobj, KOBJ_ADD); |
1da177e4c Linux-2.6.12-rc2 |
1294 |
return 0; |
e17e0f51a Driver core: show... |
1295 1296 |
out_unreg_param: module_param_sysfs_remove(mod); |
270a6c4ca /sys/modules/*/ho... |
1297 |
out_unreg_holders: |
78a2d906b Kobject: convert ... |
1298 |
kobject_put(mod->holders_dir); |
270a6c4ca /sys/modules/*/ho... |
1299 |
out_unreg: |
e17e0f51a Driver core: show... |
1300 |
kobject_put(&mod->mkobj.kobj); |
1da177e4c Linux-2.6.12-rc2 |
1301 1302 |
return err; } |
34e4e2fef modules: proper c... |
1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 |
static void mod_sysfs_fini(struct module *mod) { kobject_put(&mod->mkobj.kobj); } #else /* CONFIG_SYSFS */ static void mod_sysfs_fini(struct module *mod) { } #endif /* CONFIG_SYSFS */ |
1da177e4c Linux-2.6.12-rc2 |
1316 1317 1318 |
static void mod_kobject_remove(struct module *mod) { |
c988d2b28 [PATCH] modules: ... |
1319 |
module_remove_modinfo_attrs(mod); |
1da177e4c Linux-2.6.12-rc2 |
1320 |
module_param_sysfs_remove(mod); |
78a2d906b Kobject: convert ... |
1321 1322 |
kobject_put(mod->mkobj.drivers_dir); kobject_put(mod->holders_dir); |
34e4e2fef modules: proper c... |
1323 |
mod_sysfs_fini(mod); |
1da177e4c Linux-2.6.12-rc2 |
1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 |
} /* * 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); return 0; } |
02a3e59a0 Fix minor typoes ... |
1336 |
/* Free a module, remove from lists, etc (must hold module_mutex). */ |
1da177e4c Linux-2.6.12-rc2 |
1337 1338 |
static void free_module(struct module *mod) { |
7ead8b831 tracing/events: A... |
1339 |
trace_module_free(mod); |
1da177e4c Linux-2.6.12-rc2 |
1340 |
/* Delete from various lists */ |
9b1a4d383 stop_machine: Wea... |
1341 |
stop_machine(__unlink_module, mod, NULL); |
6d7601338 Add /sys/module/n... |
1342 |
remove_notes_attrs(mod); |
1da177e4c Linux-2.6.12-rc2 |
1343 1344 1345 1346 1347 1348 1349 1350 |
remove_sect_attrs(mod); mod_kobject_remove(mod); /* Arch-specific cleanup. */ module_arch_cleanup(mod); /* Module unload stuff */ module_unload_free(mod); |
e180a6b77 param: fix charp ... |
1351 1352 |
/* Free any allocated parameters. */ destroy_params(mod->kp, mod->num_kp); |
1da177e4c Linux-2.6.12-rc2 |
1353 1354 1355 1356 1357 |
/* This may be NULL, but that's OK */ module_free(mod, mod->module_init); kfree(mod->args); if (mod->percpu) percpu_modfree(mod->percpu); |
720eba31f modules: Use a be... |
1358 1359 1360 1361 |
#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP) if (mod->refptr) percpu_modfree(mod->refptr); #endif |
fbb9ce953 [PATCH] lockdep: ... |
1362 1363 |
/* Free lock-classes: */ lockdep_free_key_range(mod->module_core, mod->core_size); |
1da177e4c Linux-2.6.12-rc2 |
1364 1365 |
/* Finally, free the core (containing the module structure) */ module_free(mod, mod->module_core); |
eb8cdec4a nommu: add suppor... |
1366 1367 1368 1369 |
#ifdef CONFIG_MPU update_protections(current->mm); #endif |
1da177e4c Linux-2.6.12-rc2 |
1370 1371 1372 1373 1374 |
} void *__symbol_get(const char *symbol) { struct module *owner; |
414fd31b2 module: Make find... |
1375 |
const struct kernel_symbol *sym; |
1da177e4c Linux-2.6.12-rc2 |
1376 |
|
24da1cbff modules: remove m... |
1377 |
preempt_disable(); |
414fd31b2 module: Make find... |
1378 1379 1380 |
sym = find_symbol(symbol, &owner, NULL, true, true); if (sym && strong_try_module_get(owner)) sym = NULL; |
24da1cbff modules: remove m... |
1381 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
1382 |
|
414fd31b2 module: Make find... |
1383 |
return sym ? (void *)sym->value : NULL; |
1da177e4c Linux-2.6.12-rc2 |
1384 1385 |
} EXPORT_SYMBOL_GPL(__symbol_get); |
eea8b54dc [PATCH] modules: ... |
1386 1387 |
/* * Ensure that an exported symbol [global namespace] does not already exist |
02a3e59a0 Fix minor typoes ... |
1388 |
* in the kernel or in some other module's exported symbol table. |
eea8b54dc [PATCH] modules: ... |
1389 1390 1391 |
*/ static int verify_export_symbols(struct module *mod) { |
b211104d1 module: Enhance v... |
1392 |
unsigned int i; |
eea8b54dc [PATCH] modules: ... |
1393 |
struct module *owner; |
b211104d1 module: Enhance v... |
1394 1395 1396 1397 1398 1399 1400 1401 |
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... |
1402 |
#ifdef CONFIG_UNUSED_SYMBOLS |
b211104d1 module: Enhance v... |
1403 1404 |
{ mod->unused_syms, mod->num_unused_syms }, { mod->unused_gpl_syms, mod->num_unused_gpl_syms }, |
f7f5b6755 Shrink struct mod... |
1405 |
#endif |
b211104d1 module: Enhance v... |
1406 |
}; |
eea8b54dc [PATCH] modules: ... |
1407 |
|
b211104d1 module: Enhance v... |
1408 1409 |
for (i = 0; i < ARRAY_SIZE(arr); i++) { for (s = arr[i].sym; s < arr[i].sym + arr[i].num; s++) { |
414fd31b2 module: Make find... |
1410 |
if (find_symbol(s->name, &owner, NULL, true, false)) { |
b211104d1 module: Enhance v... |
1411 1412 1413 1414 1415 1416 1417 |
printk(KERN_ERR "%s: exports duplicate symbol %s" " (owned by %s) ", mod->name, s->name, module_name(owner)); return -ENOEXEC; } |
eea8b54dc [PATCH] modules: ... |
1418 |
} |
b211104d1 module: Enhance v... |
1419 1420 |
} return 0; |
eea8b54dc [PATCH] modules: ... |
1421 |
} |
9a4b9708f module: fix and e... |
1422 |
/* Change all symbols so that st_value encodes the pointer directly. */ |
1da177e4c Linux-2.6.12-rc2 |
1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 |
static int simplify_symbols(Elf_Shdr *sechdrs, unsigned int symindex, const char *strtab, unsigned int versindex, unsigned int pcpuindex, struct module *mod) { Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr; unsigned long secbase; unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym); int ret = 0; |
414fd31b2 module: Make find... |
1434 |
const struct kernel_symbol *ksym; |
1da177e4c Linux-2.6.12-rc2 |
1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 |
for (i = 1; i < n; i++) { switch (sym[i].st_shndx) { case SHN_COMMON: /* We compiled with -fno-common. These are not supposed to happen. */ DEBUGP("Common symbol: %s ", strtab + sym[i].st_name); 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: |
414fd31b2 module: Make find... |
1457 1458 |
ksym = resolve_symbol(sechdrs, versindex, strtab + sym[i].st_name, mod); |
1da177e4c Linux-2.6.12-rc2 |
1459 |
/* Ok if resolved. */ |
414fd31b2 module: Make find... |
1460 1461 |
if (ksym) { sym[i].st_value = ksym->value; |
1da177e4c Linux-2.6.12-rc2 |
1462 |
break; |
414fd31b2 module: Make find... |
1463 |
} |
1da177e4c Linux-2.6.12-rc2 |
1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 |
/* Ok if weak. */ if (ELF_ST_BIND(sym[i].st_info) == STB_WEAK) break; printk(KERN_WARNING "%s: Unknown symbol %s ", mod->name, strtab + sym[i].st_name); ret = -ENOENT; break; default: /* Divert to percpu allocation if a percpu var. */ if (sym[i].st_shndx == pcpuindex) secbase = (unsigned long)mod->percpu; else secbase = sechdrs[sym[i].st_shndx].sh_addr; sym[i].st_value += secbase; break; } } return ret; } |
088af9a6e module: fix modul... |
1487 1488 1489 1490 1491 1492 1493 |
/* 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 |
1494 |
/* Update size with this section: return offset. */ |
088af9a6e module: fix modul... |
1495 1496 |
static long get_offset(struct module *mod, unsigned int *size, Elf_Shdr *sechdr, unsigned int section) |
1da177e4c Linux-2.6.12-rc2 |
1497 1498 |
{ long ret; |
088af9a6e module: fix modul... |
1499 |
*size += arch_mod_section_prepend(mod, section); |
1da177e4c Linux-2.6.12-rc2 |
1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 |
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. */ static void layout_sections(struct module *mod, const Elf_Ehdr *hdr, Elf_Shdr *sechdrs, const char *secstrings) { 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; for (i = 0; i < hdr->e_shnum; i++) sechdrs[i].sh_entsize = ~0UL; DEBUGP("Core section allocation order: "); for (m = 0; m < ARRAY_SIZE(masks); ++m) { for (i = 0; i < hdr->e_shnum; ++i) { Elf_Shdr *s = &sechdrs[i]; if ((s->sh_flags & masks[m][0]) != masks[m][0] || (s->sh_flags & masks[m][1]) || s->sh_entsize != ~0UL |
49502677e module: use strst... |
1537 |
|| strstarts(secstrings + s->sh_name, ".init")) |
1da177e4c Linux-2.6.12-rc2 |
1538 |
continue; |
088af9a6e module: fix modul... |
1539 |
s->sh_entsize = get_offset(mod, &mod->core_size, s, i); |
1da177e4c Linux-2.6.12-rc2 |
1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 |
DEBUGP("\t%s ", secstrings + s->sh_name); } if (m == 0) mod->core_text_size = mod->core_size; } DEBUGP("Init section allocation order: "); for (m = 0; m < ARRAY_SIZE(masks); ++m) { for (i = 0; i < hdr->e_shnum; ++i) { Elf_Shdr *s = &sechdrs[i]; if ((s->sh_flags & masks[m][0]) != masks[m][0] || (s->sh_flags & masks[m][1]) || s->sh_entsize != ~0UL |
49502677e module: use strst... |
1556 |
|| !strstarts(secstrings + s->sh_name, ".init")) |
1da177e4c Linux-2.6.12-rc2 |
1557 |
continue; |
088af9a6e module: fix modul... |
1558 |
s->sh_entsize = (get_offset(mod, &mod->init_size, s, i) |
1da177e4c Linux-2.6.12-rc2 |
1559 1560 1561 1562 1563 1564 1565 1566 |
| INIT_OFFSET_MASK); DEBUGP("\t%s ", secstrings + s->sh_name); } if (m == 0) mod->init_text_size = mod->init_size; } } |
1da177e4c Linux-2.6.12-rc2 |
1567 1568 1569 1570 |
static void set_license(struct module *mod, const char *license) { if (!license) license = "unspecified"; |
fa3ba2e81 [PATCH] fix Modul... |
1571 |
if (!license_is_gpl_compatible(license)) { |
25ddbb18a Make the taint fl... |
1572 |
if (!test_taint(TAINT_PROPRIETARY_MODULE)) |
1d4d26276 [PATCH] Add missi... |
1573 |
printk(KERN_WARNING "%s: module license '%s' taints " |
fa3ba2e81 [PATCH] fix Modul... |
1574 1575 1576 |
"kernel. ", mod->name, license); add_taint_module(mod, TAINT_PROPRIETARY_MODULE); |
1da177e4c Linux-2.6.12-rc2 |
1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 |
} } /* 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; } static char *get_modinfo(Elf_Shdr *sechdrs, unsigned int info, const char *tag) { char *p; unsigned int taglen = strlen(tag); unsigned long size = sechdrs[info].sh_size; for (p = (char *)sechdrs[info].sh_addr; p; p = next_string(p, &size)) { if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=') return p + taglen + 1; } return NULL; } |
c988d2b28 [PATCH] modules: ... |
1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 |
static void setup_modinfo(struct module *mod, Elf_Shdr *sechdrs, unsigned int infoindex) { struct module_attribute *attr; int i; for (i = 0; (attr = modinfo_attrs[i]); i++) { if (attr->setup) attr->setup(mod, get_modinfo(sechdrs, infoindex, attr->attr.name)); } } |
c988d2b28 [PATCH] modules: ... |
1627 |
|
a263f7763 module: fix memor... |
1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 |
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 |
1638 |
#ifdef CONFIG_KALLSYMS |
15bba37d6 module: fix build... |
1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 |
/* 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) { const struct kernel_symbol *ks = start; for (; ks < stop; ks++) if (strcmp(ks->name, name) == 0) return ks; return NULL; } |
ca4787b77 kernel/module.c: ... |
1651 1652 |
static int is_exported(const char *name, unsigned long value, const struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1653 |
{ |
ca4787b77 kernel/module.c: ... |
1654 1655 1656 |
const struct kernel_symbol *ks; if (!mod) ks = lookup_symbol(name, __start___ksymtab, __stop___ksymtab); |
3fd6805f4 [PATCH] Clean up ... |
1657 |
else |
ca4787b77 kernel/module.c: ... |
1658 1659 |
ks = lookup_symbol(name, mod->syms, mod->syms + mod->num_syms); return ks != NULL && ks->value == value; |
1da177e4c Linux-2.6.12-rc2 |
1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 |
} /* As per nm */ static char elf_type(const Elf_Sym *sym, Elf_Shdr *sechdrs, const char *secstrings, struct module *mod) { 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'; } |
49502677e module: use strst... |
1697 |
if (strstarts(secstrings + sechdrs[sym->st_shndx].sh_name, ".debug")) |
1da177e4c Linux-2.6.12-rc2 |
1698 1699 1700 |
return 'n'; return '?'; } |
4a4962263 module: reduce sy... |
1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 |
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; } static unsigned long layout_symtab(struct module *mod, Elf_Shdr *sechdrs, unsigned int symindex, |
554bdfe5a module: reduce st... |
1725 |
unsigned int strindex, |
4a4962263 module: reduce sy... |
1726 |
const Elf_Ehdr *hdr, |
554bdfe5a module: reduce st... |
1727 1728 1729 |
const char *secstrings, unsigned long *pstroffs, unsigned long *strmap) |
4a4962263 module: reduce sy... |
1730 1731 1732 |
{ unsigned long symoffs; Elf_Shdr *symsect = sechdrs + symindex; |
554bdfe5a module: reduce st... |
1733 |
Elf_Shdr *strsect = sechdrs + strindex; |
4a4962263 module: reduce sy... |
1734 |
const Elf_Sym *src; |
554bdfe5a module: reduce st... |
1735 |
const char *strtab; |
4a4962263 module: reduce sy... |
1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 |
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, symindex) | INIT_OFFSET_MASK; DEBUGP("\t%s ", secstrings + symsect->sh_name); src = (void *)hdr + symsect->sh_offset; nsrc = symsect->sh_size / sizeof(*src); |
554bdfe5a module: reduce st... |
1747 |
strtab = (void *)hdr + strsect->sh_offset; |
4a4962263 module: reduce sy... |
1748 |
for (ndst = i = 1; i < nsrc; ++i, ++src) |
554bdfe5a module: reduce st... |
1749 1750 1751 1752 1753 |
if (is_core_symbol(src, sechdrs, hdr->e_shnum)) { unsigned int j = src->st_name; while(!__test_and_set_bit(j, strmap) && strtab[j]) ++j; |
4a4962263 module: reduce sy... |
1754 |
++ndst; |
554bdfe5a module: reduce st... |
1755 |
} |
4a4962263 module: reduce sy... |
1756 1757 1758 1759 |
/* Append room for core symbols at end of core part. */ symoffs = ALIGN(mod->core_size, symsect->sh_addralign ?: 1); mod->core_size = symoffs + ndst * sizeof(Elf_Sym); |
554bdfe5a module: reduce st... |
1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 |
/* 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, strindex) | INIT_OFFSET_MASK; DEBUGP("\t%s ", secstrings + strsect->sh_name); /* Append room for core symbols' strings at end of core part. */ *pstroffs = mod->core_size; __set_bit(0, strmap); mod->core_size += bitmap_weight(strmap, strsect->sh_size); |
4a4962263 module: reduce sy... |
1771 1772 |
return symoffs; } |
1da177e4c Linux-2.6.12-rc2 |
1773 1774 |
static void add_kallsyms(struct module *mod, Elf_Shdr *sechdrs, |
4a4962263 module: reduce sy... |
1775 |
unsigned int shnum, |
1da177e4c Linux-2.6.12-rc2 |
1776 1777 |
unsigned int symindex, unsigned int strindex, |
4a4962263 module: reduce sy... |
1778 |
unsigned long symoffs, |
554bdfe5a module: reduce st... |
1779 1780 1781 |
unsigned long stroffs, const char *secstrings, unsigned long *strmap) |
1da177e4c Linux-2.6.12-rc2 |
1782 |
{ |
4a4962263 module: reduce sy... |
1783 1784 1785 |
unsigned int i, ndst; const Elf_Sym *src; Elf_Sym *dst; |
554bdfe5a module: reduce st... |
1786 |
char *s; |
1da177e4c Linux-2.6.12-rc2 |
1787 1788 1789 1790 1791 1792 1793 1794 1795 |
mod->symtab = (void *)sechdrs[symindex].sh_addr; mod->num_symtab = sechdrs[symindex].sh_size / sizeof(Elf_Sym); mod->strtab = (void *)sechdrs[strindex].sh_addr; /* Set types up while we still have access to sections. */ for (i = 0; i < mod->num_symtab; i++) mod->symtab[i].st_info = elf_type(&mod->symtab[i], sechdrs, secstrings, mod); |
4a4962263 module: reduce sy... |
1796 1797 1798 1799 1800 1801 1802 1803 |
mod->core_symtab = dst = mod->module_core + symoffs; src = mod->symtab; *dst = *src; for (ndst = i = 1; i < mod->num_symtab; ++i, ++src) { if (!is_core_symbol(src, sechdrs, shnum)) continue; dst[ndst] = *src; |
554bdfe5a module: reduce st... |
1804 |
dst[ndst].st_name = bitmap_weight(strmap, dst[ndst].st_name); |
4a4962263 module: reduce sy... |
1805 1806 1807 |
++ndst; } mod->core_num_syms = ndst; |
554bdfe5a module: reduce st... |
1808 1809 1810 1811 1812 |
mod->core_strtab = s = mod->module_core + stroffs; for (*s = 0, i = 1; i < sechdrs[strindex].sh_size; ++i) if (test_bit(i, strmap)) *++s = mod->strtab[i]; |
1da177e4c Linux-2.6.12-rc2 |
1813 1814 |
} #else |
4a4962263 module: reduce sy... |
1815 1816 1817 |
static inline unsigned long layout_symtab(struct module *mod, Elf_Shdr *sechdrs, unsigned int symindex, |
554bdfe5a module: reduce st... |
1818 |
unsigned int strindex, |
3ae91c21d module: fix up CO... |
1819 |
const Elf_Ehdr *hdr, |
554bdfe5a module: reduce st... |
1820 1821 1822 |
const char *secstrings, unsigned long *pstroffs, unsigned long *strmap) |
4a4962263 module: reduce sy... |
1823 |
{ |
3ae91c21d module: fix up CO... |
1824 |
return 0; |
4a4962263 module: reduce sy... |
1825 |
} |
3ae91c21d module: fix up CO... |
1826 |
|
1da177e4c Linux-2.6.12-rc2 |
1827 1828 |
static inline void add_kallsyms(struct module *mod, Elf_Shdr *sechdrs, |
4a4962263 module: reduce sy... |
1829 |
unsigned int shnum, |
1da177e4c Linux-2.6.12-rc2 |
1830 1831 |
unsigned int symindex, unsigned int strindex, |
4a4962263 module: reduce sy... |
1832 |
unsigned long symoffs, |
554bdfe5a module: reduce st... |
1833 1834 1835 |
unsigned long stroffs, const char *secstrings, const unsigned long *strmap) |
1da177e4c Linux-2.6.12-rc2 |
1836 1837 1838 |
{ } #endif /* CONFIG_KALLSYMS */ |
e9d376f0f dynamic debug: co... |
1839 |
static void dynamic_debug_setup(struct _ddebug *debug, unsigned int num) |
346e15beb driver core: basi... |
1840 |
{ |
e9d376f0f dynamic debug: co... |
1841 1842 1843 1844 1845 1846 |
#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 ... |
1847 |
} |
346e15beb driver core: basi... |
1848 |
|
3a642e99b modules: Take a s... |
1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 |
static void *module_alloc_update_bounds(unsigned long size) { void *ret = module_alloc(size); if (ret) { /* 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; } return ret; } |
4f2294b6d kmemleak: Add mod... |
1862 1863 1864 1865 1866 1867 1868 |
#ifdef CONFIG_DEBUG_KMEMLEAK static void kmemleak_load_module(struct module *mod, Elf_Ehdr *hdr, Elf_Shdr *sechdrs, char *secstrings) { unsigned int i; /* only scan the sections containing data */ |
c017b4be3 kmemleak: Simplif... |
1869 |
kmemleak_scan_area(mod, sizeof(struct module), GFP_KERNEL); |
4f2294b6d kmemleak: Add mod... |
1870 1871 1872 1873 1874 1875 1876 |
for (i = 1; i < hdr->e_shnum; i++) { if (!(sechdrs[i].sh_flags & SHF_ALLOC)) continue; if (strncmp(secstrings + sechdrs[i].sh_name, ".data", 5) != 0 && strncmp(secstrings + sechdrs[i].sh_name, ".bss", 4) != 0) continue; |
c017b4be3 kmemleak: Simplif... |
1877 |
kmemleak_scan_area((void *)sechdrs[i].sh_addr, |
4f2294b6d kmemleak: Add mod... |
1878 1879 1880 1881 1882 1883 1884 1885 1886 |
sechdrs[i].sh_size, GFP_KERNEL); } } #else static inline void kmemleak_load_module(struct module *mod, Elf_Ehdr *hdr, Elf_Shdr *sechdrs, char *secstrings) { } #endif |
1da177e4c Linux-2.6.12-rc2 |
1887 1888 |
/* Allocate and load the module: note that size of section 0 is always zero, and we rely on this for optional sections. */ |
ffb4ba76a [module] Don't le... |
1889 |
static noinline struct module *load_module(void __user *umod, |
1da177e4c Linux-2.6.12-rc2 |
1890 1891 1892 1893 1894 1895 |
unsigned long len, const char __user *uargs) { Elf_Ehdr *hdr; Elf_Shdr *sechdrs; char *secstrings, *args, *modmagic, *strtab = NULL; |
061b1bd39 Staging: add TAIN... |
1896 |
char *staging; |
84860f997 [PATCH] load_modu... |
1897 1898 1899 |
unsigned int i; unsigned int symindex = 0; unsigned int strindex = 0; |
5e458cc0f module: simplify ... |
1900 |
unsigned int modindex, versindex, infoindex, pcpuindex; |
1da177e4c Linux-2.6.12-rc2 |
1901 1902 1903 |
struct module *mod; long err = 0; void *percpu = NULL, *ptr = NULL; /* Stops spurious gcc warning */ |
554bdfe5a module: reduce st... |
1904 |
unsigned long symoffs, stroffs, *strmap; |
3ae91c21d module: fix up CO... |
1905 |
|
378bac820 [PATCH] flush ica... |
1906 |
mm_segment_t old_fs; |
1da177e4c Linux-2.6.12-rc2 |
1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 |
DEBUGP("load_module: umod=%p, len=%lu, uargs=%p ", umod, len, uargs); if (len < sizeof(*hdr)) return ERR_PTR(-ENOEXEC); /* Suck in entire file: we'll want most of it. */ /* vmalloc barfs on "unusual" numbers. Check here */ if (len > 64 * 1024 * 1024 || (hdr = vmalloc(len)) == NULL) return ERR_PTR(-ENOMEM); |
9e01892c4 module: convert t... |
1918 |
|
1da177e4c Linux-2.6.12-rc2 |
1919 1920 1921 1922 1923 1924 1925 |
if (copy_from_user(hdr, umod, len) != 0) { err = -EFAULT; goto free_hdr; } /* Sanity checks against insmoding binaries or wrong arch, weird elf version */ |
c4ea6fcf5 module loading EL... |
1926 |
if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0 |
1da177e4c Linux-2.6.12-rc2 |
1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 |
|| hdr->e_type != ET_REL || !elf_check_arch(hdr) || hdr->e_shentsize != sizeof(*sechdrs)) { err = -ENOEXEC; goto free_hdr; } if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr)) goto truncated; /* Convenience variables */ sechdrs = (void *)hdr + hdr->e_shoff; secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset; sechdrs[0].sh_addr = 0; for (i = 1; i < hdr->e_shnum; i++) { if (sechdrs[i].sh_type != SHT_NOBITS && len < sechdrs[i].sh_offset + sechdrs[i].sh_size) goto truncated; /* Mark all sections sh_addr with their address in the temporary image. */ sechdrs[i].sh_addr = (size_t)hdr + sechdrs[i].sh_offset; /* Internal symbols and strings. */ if (sechdrs[i].sh_type == SHT_SYMTAB) { symindex = i; strindex = sechdrs[i].sh_link; strtab = (char *)hdr + sechdrs[strindex].sh_offset; } #ifndef CONFIG_MODULE_UNLOAD /* Don't load .exit sections */ |
49502677e module: use strst... |
1959 |
if (strstarts(secstrings+sechdrs[i].sh_name, ".exit")) |
1da177e4c Linux-2.6.12-rc2 |
1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 |
sechdrs[i].sh_flags &= ~(unsigned long)SHF_ALLOC; #endif } modindex = find_sec(hdr, sechdrs, secstrings, ".gnu.linkonce.this_module"); if (!modindex) { printk(KERN_WARNING "No module found in object "); err = -ENOEXEC; goto free_hdr; } |
5e458cc0f module: simplify ... |
1972 |
/* This is temporary: point mod into copy of data. */ |
1da177e4c Linux-2.6.12-rc2 |
1973 1974 1975 1976 1977 1978 1979 1980 1981 |
mod = (void *)sechdrs[modindex].sh_addr; if (symindex == 0) { printk(KERN_WARNING "%s: module has no symbols (stripped?) ", mod->name); err = -ENOEXEC; goto free_hdr; } |
1da177e4c Linux-2.6.12-rc2 |
1982 1983 1984 |
versindex = find_sec(hdr, sechdrs, secstrings, "__versions"); infoindex = find_sec(hdr, sechdrs, secstrings, ".modinfo"); pcpuindex = find_pcpusec(hdr, sechdrs, secstrings); |
ea01e798e module: reduce mo... |
1985 |
/* Don't keep modinfo and version sections. */ |
1da177e4c Linux-2.6.12-rc2 |
1986 |
sechdrs[infoindex].sh_flags &= ~(unsigned long)SHF_ALLOC; |
ea01e798e module: reduce mo... |
1987 |
sechdrs[versindex].sh_flags &= ~(unsigned long)SHF_ALLOC; |
1da177e4c Linux-2.6.12-rc2 |
1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 |
/* Check module struct version now, before we try to use module. */ if (!check_modstruct_version(sechdrs, versindex, mod)) { err = -ENOEXEC; goto free_hdr; } modmagic = get_modinfo(sechdrs, infoindex, "vermagic"); /* This is allowed: modprobe --force will invalidate it. */ if (!modmagic) { |
c6e665c8f module: clarify t... |
1998 |
err = try_to_force_load(mod, "bad vermagic"); |
826e4506a Make forced modul... |
1999 2000 |
if (err) goto free_hdr; |
91e37a793 module: don't ign... |
2001 |
} else if (!same_magic(modmagic, vermagic, versindex)) { |
1da177e4c Linux-2.6.12-rc2 |
2002 2003 2004 2005 2006 2007 |
printk(KERN_ERR "%s: version magic '%s' should be '%s' ", mod->name, modmagic, vermagic); err = -ENOEXEC; goto free_hdr; } |
061b1bd39 Staging: add TAIN... |
2008 2009 2010 2011 2012 2013 2014 2015 |
staging = get_modinfo(sechdrs, infoindex, "staging"); if (staging) { 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); } |
1da177e4c Linux-2.6.12-rc2 |
2016 |
/* Now copy in args */ |
24277dda3 [PATCH] strndup_u... |
2017 2018 2019 |
args = strndup_user(uargs, ~0UL >> 1); if (IS_ERR(args)) { err = PTR_ERR(args); |
1da177e4c Linux-2.6.12-rc2 |
2020 2021 |
goto free_hdr; } |
8e08b7568 [PATCH] module: s... |
2022 |
|
554bdfe5a module: reduce st... |
2023 2024 2025 2026 2027 2028 |
strmap = kzalloc(BITS_TO_LONGS(sechdrs[strindex].sh_size) * sizeof(long), GFP_KERNEL); if (!strmap) { err = -ENOMEM; goto free_mod; } |
1da177e4c Linux-2.6.12-rc2 |
2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 |
if (find_module(mod->name)) { err = -EEXIST; goto free_mod; } mod->state = MODULE_STATE_COMING; /* Allow arches to frob section contents and sizes. */ err = module_frob_arch_sections(hdr, sechdrs, secstrings, mod); if (err < 0) goto free_mod; if (pcpuindex) { /* We have a special allocation for this section. */ percpu = percpu_modalloc(sechdrs[pcpuindex].sh_size, |
842bbaaa7 [PATCH] Module pe... |
2044 2045 |
sechdrs[pcpuindex].sh_addralign, mod->name); |
1da177e4c Linux-2.6.12-rc2 |
2046 2047 |
if (!percpu) { err = -ENOMEM; |
6e2b75740 module: fix refpt... |
2048 |
goto free_mod; |
1da177e4c Linux-2.6.12-rc2 |
2049 2050 2051 2052 2053 2054 2055 2056 2057 |
} sechdrs[pcpuindex].sh_flags &= ~(unsigned long)SHF_ALLOC; mod->percpu = percpu; } /* 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. */ layout_sections(mod, hdr, sechdrs, secstrings); |
554bdfe5a module: reduce st... |
2058 2059 |
symoffs = layout_symtab(mod, sechdrs, symindex, strindex, hdr, secstrings, &stroffs, strmap); |
1da177e4c Linux-2.6.12-rc2 |
2060 2061 |
/* Do the allocs. */ |
3a642e99b modules: Take a s... |
2062 |
ptr = module_alloc_update_bounds(mod->core_size); |
4f2294b6d kmemleak: Add mod... |
2063 2064 2065 2066 2067 2068 |
/* * 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); |
1da177e4c Linux-2.6.12-rc2 |
2069 2070 2071 2072 2073 2074 |
if (!ptr) { err = -ENOMEM; goto free_percpu; } memset(ptr, 0, mod->core_size); mod->module_core = ptr; |
3a642e99b modules: Take a s... |
2075 |
ptr = module_alloc_update_bounds(mod->init_size); |
4f2294b6d kmemleak: Add mod... |
2076 2077 2078 2079 2080 2081 2082 |
/* * 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); |
1da177e4c Linux-2.6.12-rc2 |
2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 |
if (!ptr && mod->init_size) { err = -ENOMEM; goto free_core; } memset(ptr, 0, mod->init_size); mod->module_init = ptr; /* Transfer each section which specifies SHF_ALLOC */ DEBUGP("final section addresses: "); for (i = 0; i < hdr->e_shnum; i++) { void *dest; if (!(sechdrs[i].sh_flags & SHF_ALLOC)) continue; if (sechdrs[i].sh_entsize & INIT_OFFSET_MASK) dest = mod->module_init + (sechdrs[i].sh_entsize & ~INIT_OFFSET_MASK); else dest = mod->module_core + sechdrs[i].sh_entsize; if (sechdrs[i].sh_type != SHT_NOBITS) memcpy(dest, (void *)sechdrs[i].sh_addr, sechdrs[i].sh_size); /* Update sh_addr to point to copy in image. */ sechdrs[i].sh_addr = (unsigned long)dest; DEBUGP("\t0x%lx %s ", sechdrs[i].sh_addr, secstrings + sechdrs[i].sh_name); } /* Module has been moved. */ mod = (void *)sechdrs[modindex].sh_addr; |
4f2294b6d kmemleak: Add mod... |
2115 |
kmemleak_load_module(mod, hdr, sechdrs, secstrings); |
1da177e4c Linux-2.6.12-rc2 |
2116 |
|
6e2b75740 module: fix refpt... |
2117 2118 2119 2120 2121 2122 2123 2124 |
#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP) mod->refptr = percpu_modalloc(sizeof(local_t), __alignof__(local_t), mod->name); if (!mod->refptr) { err = -ENOMEM; goto free_init; } #endif |
1da177e4c Linux-2.6.12-rc2 |
2125 2126 |
/* Now we've moved module, initialize linked lists, etc. */ module_unload_init(mod); |
97c146ef0 sysfs: fix /sys/m... |
2127 |
/* add kobject, so we can reference it. */ |
d58ae6781 module: return er... |
2128 2129 |
err = mod_sysfs_init(mod); if (err) |
97c146ef0 sysfs: fix /sys/m... |
2130 |
goto free_unload; |
270a6c4ca /sys/modules/*/ho... |
2131 |
|
1da177e4c Linux-2.6.12-rc2 |
2132 2133 |
/* Set up license info based on the info section */ set_license(mod, get_modinfo(sechdrs, infoindex, "license")); |
9b37ccfc6 module: allow ndi... |
2134 2135 2136 2137 2138 |
/* * 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. */ |
fa3ba2e81 [PATCH] fix Modul... |
2139 |
if (strcmp(mod->name, "ndiswrapper") == 0) |
9b37ccfc6 module: allow ndi... |
2140 2141 2142 |
add_taint(TAINT_PROPRIETARY_MODULE); /* driverloader was caught wrongly pretending to be under GPL */ |
fa3ba2e81 [PATCH] fix Modul... |
2143 2144 |
if (strcmp(mod->name, "driverloader") == 0) add_taint_module(mod, TAINT_PROPRIETARY_MODULE); |
9841d61d7 [PATCH] Add taint... |
2145 |
|
c988d2b28 [PATCH] modules: ... |
2146 2147 |
/* Set up MODINFO_ATTR fields */ setup_modinfo(mod, sechdrs, infoindex); |
c988d2b28 [PATCH] modules: ... |
2148 |
|
1da177e4c Linux-2.6.12-rc2 |
2149 2150 2151 2152 2153 |
/* Fix up syms, so that st_value is a pointer to location. */ err = simplify_symbols(sechdrs, symindex, strtab, versindex, pcpuindex, mod); if (err < 0) goto cleanup; |
5e458cc0f module: simplify ... |
2154 2155 |
/* Now we've got everything in the final locations, we can * find optional sections. */ |
e180a6b77 param: fix charp ... |
2156 2157 |
mod->kp = section_objs(hdr, sechdrs, secstrings, "__param", sizeof(*mod->kp), &mod->num_kp); |
5e458cc0f module: simplify ... |
2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 |
mod->syms = section_objs(hdr, sechdrs, secstrings, "__ksymtab", sizeof(*mod->syms), &mod->num_syms); mod->crcs = section_addr(hdr, sechdrs, secstrings, "__kcrctab"); mod->gpl_syms = section_objs(hdr, sechdrs, secstrings, "__ksymtab_gpl", sizeof(*mod->gpl_syms), &mod->num_gpl_syms); mod->gpl_crcs = section_addr(hdr, sechdrs, secstrings, "__kcrctab_gpl"); mod->gpl_future_syms = section_objs(hdr, sechdrs, secstrings, "__ksymtab_gpl_future", sizeof(*mod->gpl_future_syms), &mod->num_gpl_future_syms); mod->gpl_future_crcs = section_addr(hdr, sechdrs, secstrings, "__kcrctab_gpl_future"); |
1da177e4c Linux-2.6.12-rc2 |
2171 |
|
f7f5b6755 Shrink struct mod... |
2172 |
#ifdef CONFIG_UNUSED_SYMBOLS |
5e458cc0f module: simplify ... |
2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 |
mod->unused_syms = section_objs(hdr, sechdrs, secstrings, "__ksymtab_unused", sizeof(*mod->unused_syms), &mod->num_unused_syms); mod->unused_crcs = section_addr(hdr, sechdrs, secstrings, "__kcrctab_unused"); mod->unused_gpl_syms = section_objs(hdr, sechdrs, secstrings, "__ksymtab_unused_gpl", sizeof(*mod->unused_gpl_syms), &mod->num_unused_gpl_syms); mod->unused_gpl_crcs = section_addr(hdr, sechdrs, secstrings, "__kcrctab_unused_gpl"); #endif |
b99b87f70 kernel: construct... |
2186 2187 2188 2189 |
#ifdef CONFIG_CONSTRUCTORS mod->ctors = section_objs(hdr, sechdrs, secstrings, ".ctors", sizeof(*mod->ctors), &mod->num_ctors); #endif |
5e458cc0f module: simplify ... |
2190 |
|
5e458cc0f module: simplify ... |
2191 2192 2193 2194 2195 |
#ifdef CONFIG_TRACEPOINTS mod->tracepoints = section_objs(hdr, sechdrs, secstrings, "__tracepoints", sizeof(*mod->tracepoints), &mod->num_tracepoints); |
f7f5b6755 Shrink struct mod... |
2196 |
#endif |
6d723736e tracing/events: a... |
2197 2198 2199 2200 2201 |
#ifdef CONFIG_EVENT_TRACING mod->trace_events = section_objs(hdr, sechdrs, secstrings, "_ftrace_events", sizeof(*mod->trace_events), &mod->num_trace_events); |
a6f5aa1ea kmemleak: Scan th... |
2202 2203 2204 2205 2206 2207 |
/* * 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); |
6d723736e tracing/events: a... |
2208 |
#endif |
93eb677d7 ftrace: use modul... |
2209 2210 2211 2212 2213 2214 2215 |
#ifdef CONFIG_FTRACE_MCOUNT_RECORD /* sechdrs[0].sh_size is always zero */ mod->ftrace_callsites = section_objs(hdr, sechdrs, secstrings, "__mcount_loc", sizeof(*mod->ftrace_callsites), &mod->num_ftrace_callsites); #endif |
1da177e4c Linux-2.6.12-rc2 |
2216 |
#ifdef CONFIG_MODVERSIONS |
5e458cc0f module: simplify ... |
2217 2218 2219 |
if ((mod->num_syms && !mod->crcs) || (mod->num_gpl_syms && !mod->gpl_crcs) || (mod->num_gpl_future_syms && !mod->gpl_future_crcs) |
f7f5b6755 Shrink struct mod... |
2220 |
#ifdef CONFIG_UNUSED_SYMBOLS |
5e458cc0f module: simplify ... |
2221 2222 |
|| (mod->num_unused_syms && !mod->unused_crcs) || (mod->num_unused_gpl_syms && !mod->unused_gpl_crcs) |
f7f5b6755 Shrink struct mod... |
2223 2224 |
#endif ) { |
c6e665c8f module: clarify t... |
2225 2226 |
err = try_to_force_load(mod, "no versions for exported symbols"); |
826e4506a Make forced modul... |
2227 2228 |
if (err) goto cleanup; |
1da177e4c Linux-2.6.12-rc2 |
2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 |
} #endif /* Now do relocations. */ for (i = 1; i < hdr->e_shnum; i++) { const char *strtab = (char *)sechdrs[strindex].sh_addr; unsigned int info = sechdrs[i].sh_info; /* Not a valid relocation section? */ if (info >= hdr->e_shnum) continue; /* Don't bother with non-allocated sections */ if (!(sechdrs[info].sh_flags & SHF_ALLOC)) continue; if (sechdrs[i].sh_type == SHT_REL) err = apply_relocate(sechdrs, strtab, symindex, i,mod); else if (sechdrs[i].sh_type == SHT_RELA) err = apply_relocate_add(sechdrs, strtab, symindex, i, mod); if (err < 0) goto cleanup; } |
eea8b54dc [PATCH] modules: ... |
2253 2254 |
/* Find duplicate symbols */ err = verify_export_symbols(mod); |
eea8b54dc [PATCH] modules: ... |
2255 2256 |
if (err < 0) goto cleanup; |
1da177e4c Linux-2.6.12-rc2 |
2257 |
/* Set up and sort exception table */ |
5e458cc0f module: simplify ... |
2258 2259 2260 |
mod->extable = section_objs(hdr, sechdrs, secstrings, "__ex_table", sizeof(*mod->extable), &mod->num_exentries); sort_extable(mod->extable, mod->extable + mod->num_exentries); |
1da177e4c Linux-2.6.12-rc2 |
2261 2262 2263 2264 |
/* Finally, copy percpu area over. */ percpu_modcopy(mod->percpu, (void *)sechdrs[pcpuindex].sh_addr, sechdrs[pcpuindex].sh_size); |
4a4962263 module: reduce sy... |
2265 |
add_kallsyms(mod, sechdrs, hdr->e_shnum, symindex, strindex, |
554bdfe5a module: reduce st... |
2266 2267 2268 |
symoffs, stroffs, secstrings, strmap); kfree(strmap); strmap = NULL; |
1da177e4c Linux-2.6.12-rc2 |
2269 |
|
97e1c18e8 tracing: Kernel T... |
2270 |
if (!mod->taints) { |
e9d376f0f dynamic debug: co... |
2271 |
struct _ddebug *debug; |
5e458cc0f module: simplify ... |
2272 |
unsigned int num_debug; |
5e458cc0f module: simplify ... |
2273 2274 |
debug = section_objs(hdr, sechdrs, secstrings, "__verbose", sizeof(*debug), &num_debug); |
e9d376f0f dynamic debug: co... |
2275 2276 |
if (debug) dynamic_debug_setup(debug, num_debug); |
97e1c18e8 tracing: Kernel T... |
2277 |
} |
90d595fe5 ftrace: enable mc... |
2278 |
|
1da177e4c Linux-2.6.12-rc2 |
2279 2280 2281 |
err = module_finalize(hdr, sechdrs, mod); if (err < 0) goto cleanup; |
378bac820 [PATCH] flush ica... |
2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 |
/* 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); |
1da177e4c Linux-2.6.12-rc2 |
2299 |
mod->args = args; |
5e458cc0f module: simplify ... |
2300 |
if (section_addr(hdr, sechdrs, secstrings, "__obsparm")) |
8d3b33f67 [PATCH] Remove MO... |
2301 2302 2303 |
printk(KERN_WARNING "%s: Ignoring obsolete parameters ", mod->name); |
bb9d3d56e module: better OO... |
2304 |
/* Now sew it into the lists so we can get lockdep and oops |
d72b37513 Remove stop_machi... |
2305 2306 2307 2308 2309 2310 2311 |
* info during argument parsing. Noone should access us, since * 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. */ list_add_rcu(&mod->list, &modules); |
bb9d3d56e module: better OO... |
2312 |
|
e180a6b77 param: fix charp ... |
2313 |
err = parse_args(mod->name, mod->args, mod->kp, mod->num_kp, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2314 |
if (err < 0) |
bb9d3d56e module: better OO... |
2315 |
goto unlink; |
1da177e4c Linux-2.6.12-rc2 |
2316 |
|
e180a6b77 param: fix charp ... |
2317 |
err = mod_sysfs_setup(mod, mod->kp, mod->num_kp); |
1da177e4c Linux-2.6.12-rc2 |
2318 |
if (err < 0) |
bb9d3d56e module: better OO... |
2319 |
goto unlink; |
1da177e4c Linux-2.6.12-rc2 |
2320 |
add_sect_attrs(mod, hdr->e_shnum, secstrings, sechdrs); |
6d7601338 Add /sys/module/n... |
2321 |
add_notes_attrs(mod, hdr->e_shnum, secstrings, sechdrs); |
1da177e4c Linux-2.6.12-rc2 |
2322 2323 2324 |
/* Get rid of temporary copy */ vfree(hdr); |
7ead8b831 tracing/events: A... |
2325 |
trace_module_load(mod); |
1da177e4c Linux-2.6.12-rc2 |
2326 2327 |
/* Done! */ return mod; |
bb9d3d56e module: better OO... |
2328 |
unlink: |
e91defa26 module: don't use... |
2329 2330 2331 |
/* Unlink carefully: kallsyms could be walking list. */ list_del_rcu(&mod->list); synchronize_sched(); |
1da177e4c Linux-2.6.12-rc2 |
2332 2333 |
module_arch_cleanup(mod); cleanup: |
a263f7763 module: fix memor... |
2334 |
free_modinfo(mod); |
97c146ef0 sysfs: fix /sys/m... |
2335 2336 2337 |
kobject_del(&mod->mkobj.kobj); kobject_put(&mod->mkobj.kobj); free_unload: |
1da177e4c Linux-2.6.12-rc2 |
2338 |
module_unload_free(mod); |
6e2b75740 module: fix refpt... |
2339 2340 |
#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP) percpu_modfree(mod->refptr); |
ffa9f12a4 module: don't cal... |
2341 |
free_init: |
6e2b75740 module: fix refpt... |
2342 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
2343 2344 2345 |
module_free(mod, mod->module_init); free_core: module_free(mod, mod->module_core); |
6e2b75740 module: fix refpt... |
2346 |
/* mod will be freed with core. Don't access it beyond this line! */ |
1da177e4c Linux-2.6.12-rc2 |
2347 2348 2349 2350 2351 |
free_percpu: if (percpu) percpu_modfree(percpu); free_mod: kfree(args); |
554bdfe5a module: reduce st... |
2352 |
kfree(strmap); |
1da177e4c Linux-2.6.12-rc2 |
2353 2354 |
free_hdr: vfree(hdr); |
6fe2e70bb [PATCH] kernel/mo... |
2355 |
return ERR_PTR(err); |
1da177e4c Linux-2.6.12-rc2 |
2356 2357 2358 2359 2360 2361 2362 |
truncated: printk(KERN_ERR "Module len %lu truncated ", len); err = -ENOEXEC; goto free_hdr; } |
b99b87f70 kernel: construct... |
2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 |
/* 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 |
2373 |
/* This is where the real work happens */ |
17da2bd90 [CVE-2009-0029] S... |
2374 2375 |
SYSCALL_DEFINE3(init_module, void __user *, umod, unsigned long, len, const char __user *, uargs) |
1da177e4c Linux-2.6.12-rc2 |
2376 2377 2378 2379 2380 |
{ struct module *mod; int ret = 0; /* Must have permission */ |
3d43321b7 modules: sysctl t... |
2381 |
if (!capable(CAP_SYS_MODULE) || modules_disabled) |
1da177e4c Linux-2.6.12-rc2 |
2382 2383 2384 |
return -EPERM; /* Only one module load at a time, please */ |
6389a3851 [PATCH] kernel/mo... |
2385 |
if (mutex_lock_interruptible(&module_mutex) != 0) |
1da177e4c Linux-2.6.12-rc2 |
2386 2387 2388 2389 2390 |
return -EINTR; /* Do all the hard work */ mod = load_module(umod, len, uargs); if (IS_ERR(mod)) { |
6389a3851 [PATCH] kernel/mo... |
2391 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
2392 2393 |
return PTR_ERR(mod); } |
1da177e4c Linux-2.6.12-rc2 |
2394 |
/* Drop lock so they can recurse */ |
6389a3851 [PATCH] kernel/mo... |
2395 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
2396 |
|
e041c6834 [PATCH] Notifier ... |
2397 2398 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_COMING, mod); |
1da177e4c Linux-2.6.12-rc2 |
2399 |
|
b99b87f70 kernel: construct... |
2400 |
do_mod_ctors(mod); |
1da177e4c Linux-2.6.12-rc2 |
2401 2402 |
/* Start the module */ if (mod->init != NULL) |
59f9415ff modules: extend i... |
2403 |
ret = do_one_initcall(mod->init); |
1da177e4c Linux-2.6.12-rc2 |
2404 2405 2406 2407 |
if (ret < 0) { /* Init routine failed: abort. Try to protect us from buggy refcounters. */ mod->state = MODULE_STATE_GOING; |
fbd568a3e [PATCH] Change sy... |
2408 |
synchronize_sched(); |
af49d9248 Remove "unsafe" f... |
2409 |
module_put(mod); |
df4b565e1 module: add MODUL... |
2410 2411 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); |
af49d9248 Remove "unsafe" f... |
2412 2413 2414 |
mutex_lock(&module_mutex); free_module(mod); mutex_unlock(&module_mutex); |
c9a3ba55b module: wait for ... |
2415 |
wake_up(&module_wq); |
1da177e4c Linux-2.6.12-rc2 |
2416 2417 |
return ret; } |
e24e2e64c modules: warn abo... |
2418 |
if (ret > 0) { |
ad361c988 Remove multiple K... |
2419 2420 2421 2422 2423 |
printk(KERN_WARNING "%s: '%s'->init suspiciously returned %d, it should follow 0/-E convention " "%s: loading module anyway... ", |
e24e2e64c modules: warn abo... |
2424 2425 2426 2427 |
__func__, mod->name, ret, __func__); dump_stack(); } |
1da177e4c Linux-2.6.12-rc2 |
2428 |
|
6c5db22d2 modules: fix modu... |
2429 |
/* Now it's a first class citizen! Wake up anyone waiting for it. */ |
1da177e4c Linux-2.6.12-rc2 |
2430 |
mod->state = MODULE_STATE_LIVE; |
6c5db22d2 modules: fix modu... |
2431 |
wake_up(&module_wq); |
0deddf436 module: add MODUL... |
2432 2433 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_LIVE, mod); |
6c5db22d2 modules: fix modu... |
2434 |
|
d6de2c80e async: Fix module... |
2435 2436 |
/* We need to finish all async code before the module init sequence is done */ async_synchronize_full(); |
6c5db22d2 modules: fix modu... |
2437 |
mutex_lock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
2438 2439 |
/* Drop initial reference. */ module_put(mod); |
ad6561dff module: trim exce... |
2440 |
trim_init_extable(mod); |
4a4962263 module: reduce sy... |
2441 2442 2443 |
#ifdef CONFIG_KALLSYMS mod->num_symtab = mod->core_num_syms; mod->symtab = mod->core_symtab; |
554bdfe5a module: reduce st... |
2444 |
mod->strtab = mod->core_strtab; |
4a4962263 module: reduce sy... |
2445 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
2446 2447 2448 2449 |
module_free(mod, mod->module_init); mod->module_init = NULL; mod->init_size = 0; mod->init_text_size = 0; |
6389a3851 [PATCH] kernel/mo... |
2450 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 |
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 $d. */ static inline int is_arm_mapping_symbol(const char *str) { |
22a8bdeb5 whitespace fixes:... |
2467 |
return str[0] == '$' && strchr("atd", str[1]) |
1da177e4c Linux-2.6.12-rc2 |
2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 |
&& (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... |
2480 |
if (within_module_init(addr, mod)) |
1da177e4c Linux-2.6.12-rc2 |
2481 |
nextval = (unsigned long)mod->module_init+mod->init_text_size; |
22a8bdeb5 whitespace fixes:... |
2482 |
else |
1da177e4c Linux-2.6.12-rc2 |
2483 2484 2485 |
nextval = (unsigned long)mod->module_core+mod->core_text_size; /* Scan for closest preceeding symbol, and next symbol. (ELF |
22a8bdeb5 whitespace fixes:... |
2486 |
starts real symbols at 1). */ |
1da177e4c Linux-2.6.12-rc2 |
2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 |
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... |
2507 2508 2509 2510 |
if (size) *size = nextval - mod->symtab[best].st_value; if (offset) *offset = addr - mod->symtab[best].st_value; |
1da177e4c Linux-2.6.12-rc2 |
2511 2512 |
return mod->strtab + mod->symtab[best].st_name; } |
6dd06c9fb module: make modu... |
2513 2514 |
/* 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... |
2515 |
const char *module_address_lookup(unsigned long addr, |
6dd06c9fb module: make modu... |
2516 2517 2518 2519 |
unsigned long *size, unsigned long *offset, char **modname, char *namebuf) |
1da177e4c Linux-2.6.12-rc2 |
2520 2521 |
{ struct module *mod; |
cb2a52052 modules: de-mutex... |
2522 |
const char *ret = NULL; |
1da177e4c Linux-2.6.12-rc2 |
2523 |
|
cb2a52052 modules: de-mutex... |
2524 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
2525 |
list_for_each_entry_rcu(mod, &modules, list) { |
a06f6211e module: add withi... |
2526 2527 |
if (within_module_init(addr, mod) || within_module_core(addr, mod)) { |
ffc508919 [PATCH] Create ka... |
2528 2529 |
if (modname) *modname = mod->name; |
cb2a52052 modules: de-mutex... |
2530 2531 |
ret = get_ksymbol(mod, addr, size, offset); break; |
1da177e4c Linux-2.6.12-rc2 |
2532 2533 |
} } |
6dd06c9fb module: make modu... |
2534 2535 2536 2537 2538 |
/* Make a copy in here where it's safe */ if (ret) { strncpy(namebuf, ret, KSYM_NAME_LEN - 1); ret = namebuf; } |
cb2a52052 modules: de-mutex... |
2539 |
preempt_enable(); |
92dfc9dc7 fix "modules: mak... |
2540 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
2541 |
} |
9d65cb4a1 Fix race between ... |
2542 2543 2544 |
int lookup_module_symbol_name(unsigned long addr, char *symname) { struct module *mod; |
cb2a52052 modules: de-mutex... |
2545 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
2546 |
list_for_each_entry_rcu(mod, &modules, list) { |
a06f6211e module: add withi... |
2547 2548 |
if (within_module_init(addr, mod) || within_module_core(addr, mod)) { |
9d65cb4a1 Fix race between ... |
2549 2550 2551 2552 2553 |
const char *sym; sym = get_ksymbol(mod, addr, NULL, NULL); if (!sym) goto out; |
9281acea6 kallsyms: make KS... |
2554 |
strlcpy(symname, sym, KSYM_NAME_LEN); |
cb2a52052 modules: de-mutex... |
2555 |
preempt_enable(); |
9d65cb4a1 Fix race between ... |
2556 2557 2558 2559 |
return 0; } } out: |
cb2a52052 modules: de-mutex... |
2560 |
preempt_enable(); |
9d65cb4a1 Fix race between ... |
2561 2562 |
return -ERANGE; } |
a5c43dae7 Fix race between ... |
2563 2564 2565 2566 |
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... |
2567 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
2568 |
list_for_each_entry_rcu(mod, &modules, list) { |
a06f6211e module: add withi... |
2569 2570 |
if (within_module_init(addr, mod) || within_module_core(addr, mod)) { |
a5c43dae7 Fix race between ... |
2571 2572 2573 2574 2575 2576 |
const char *sym; sym = get_ksymbol(mod, addr, size, offset); if (!sym) goto out; if (modname) |
9281acea6 kallsyms: make KS... |
2577 |
strlcpy(modname, mod->name, MODULE_NAME_LEN); |
a5c43dae7 Fix race between ... |
2578 |
if (name) |
9281acea6 kallsyms: make KS... |
2579 |
strlcpy(name, sym, KSYM_NAME_LEN); |
cb2a52052 modules: de-mutex... |
2580 |
preempt_enable(); |
a5c43dae7 Fix race between ... |
2581 2582 2583 2584 |
return 0; } } out: |
cb2a52052 modules: de-mutex... |
2585 |
preempt_enable(); |
a5c43dae7 Fix race between ... |
2586 2587 |
return -ERANGE; } |
ea07890a6 Fix race between ... |
2588 2589 |
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 |
2590 2591 |
{ struct module *mod; |
cb2a52052 modules: de-mutex... |
2592 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
2593 |
list_for_each_entry_rcu(mod, &modules, list) { |
1da177e4c Linux-2.6.12-rc2 |
2594 2595 2596 |
if (symnum < mod->num_symtab) { *value = mod->symtab[symnum].st_value; *type = mod->symtab[symnum].st_info; |
098c5eea0 [PATCH] null-term... |
2597 |
strlcpy(name, mod->strtab + mod->symtab[symnum].st_name, |
9281acea6 kallsyms: make KS... |
2598 2599 |
KSYM_NAME_LEN); strlcpy(module_name, mod->name, MODULE_NAME_LEN); |
ca4787b77 kernel/module.c: ... |
2600 |
*exported = is_exported(name, *value, mod); |
cb2a52052 modules: de-mutex... |
2601 |
preempt_enable(); |
ea07890a6 Fix race between ... |
2602 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
2603 2604 2605 |
} symnum -= mod->num_symtab; } |
cb2a52052 modules: de-mutex... |
2606 |
preempt_enable(); |
ea07890a6 Fix race between ... |
2607 |
return -ERANGE; |
1da177e4c Linux-2.6.12-rc2 |
2608 2609 2610 2611 2612 2613 2614 |
} 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... |
2615 2616 |
if (strcmp(name, mod->strtab+mod->symtab[i].st_name) == 0 && mod->symtab[i].st_info != 'U') |
1da177e4c Linux-2.6.12-rc2 |
2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 |
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... |
2629 |
preempt_disable(); |
1da177e4c Linux-2.6.12-rc2 |
2630 2631 2632 2633 2634 2635 |
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... |
2636 |
list_for_each_entry_rcu(mod, &modules, list) |
1da177e4c Linux-2.6.12-rc2 |
2637 2638 2639 |
if ((ret = mod_find_symname(mod, name)) != 0) break; } |
cb2a52052 modules: de-mutex... |
2640 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
2641 2642 |
return ret; } |
75a66614d Ksplice: Add func... |
2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 |
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 |
2662 |
#endif /* CONFIG_KALLSYMS */ |
21aa9280b debug: show being... |
2663 |
static char *module_flags(struct module *mod, char *buf) |
fa3ba2e81 [PATCH] fix Modul... |
2664 2665 |
{ int bx = 0; |
21aa9280b debug: show being... |
2666 2667 2668 |
if (mod->taints || mod->state == MODULE_STATE_GOING || mod->state == MODULE_STATE_COMING) { |
fa3ba2e81 [PATCH] fix Modul... |
2669 |
buf[bx++] = '('; |
25ddbb18a Make the taint fl... |
2670 |
if (mod->taints & (1 << TAINT_PROPRIETARY_MODULE)) |
fa3ba2e81 [PATCH] fix Modul... |
2671 |
buf[bx++] = 'P'; |
25ddbb18a Make the taint fl... |
2672 |
if (mod->taints & (1 << TAINT_FORCED_MODULE)) |
fa3ba2e81 [PATCH] fix Modul... |
2673 |
buf[bx++] = 'F'; |
26e9a3977 Merge git://git.k... |
2674 |
if (mod->taints & (1 << TAINT_CRAP)) |
061b1bd39 Staging: add TAIN... |
2675 |
buf[bx++] = 'C'; |
fa3ba2e81 [PATCH] fix Modul... |
2676 2677 2678 2679 2680 |
/* * TAINT_FORCED_RMMOD: could be added. * TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't * apply to modules. */ |
21aa9280b debug: show being... |
2681 2682 2683 2684 2685 2686 2687 |
/* 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... |
2688 2689 2690 2691 2692 2693 |
buf[bx++] = ')'; } buf[bx] = '\0'; return buf; } |
3b5d5c6b0 proc: move /proc/... |
2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 |
#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 |
2711 2712 2713 |
static int m_show(struct seq_file *m, void *p) { struct module *mod = list_entry(p, struct module, list); |
fa3ba2e81 [PATCH] fix Modul... |
2714 |
char buf[8]; |
2f0f2a334 module: turn long... |
2715 |
seq_printf(m, "%s %u", |
1da177e4c Linux-2.6.12-rc2 |
2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 |
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. */ seq_printf(m, " 0x%p", mod->module_core); |
fa3ba2e81 [PATCH] fix Modul... |
2726 2727 |
/* Taints info */ if (mod->taints) |
21aa9280b debug: show being... |
2728 |
seq_printf(m, " %s", module_flags(mod, buf)); |
fa3ba2e81 [PATCH] fix Modul... |
2729 |
|
1da177e4c Linux-2.6.12-rc2 |
2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 |
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/... |
2740 |
static const struct seq_operations modules_op = { |
1da177e4c Linux-2.6.12-rc2 |
2741 2742 2743 2744 2745 |
.start = m_start, .next = m_next, .stop = m_stop, .show = m_show }; |
3b5d5c6b0 proc: move /proc/... |
2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 |
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 |
2765 2766 2767 |
/* 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 |
2768 2769 |
const struct exception_table_entry *e = NULL; struct module *mod; |
24da1cbff modules: remove m... |
2770 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
2771 |
list_for_each_entry_rcu(mod, &modules, list) { |
1da177e4c Linux-2.6.12-rc2 |
2772 2773 |
if (mod->num_exentries == 0) continue; |
22a8bdeb5 whitespace fixes:... |
2774 |
|
1da177e4c Linux-2.6.12-rc2 |
2775 2776 2777 2778 2779 2780 |
e = search_extable(mod->extable, mod->extable + mod->num_exentries - 1, addr); if (e) break; } |
24da1cbff modules: remove m... |
2781 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
2782 2783 |
/* Now, if we found one, we are running inside it now, hence |
22a8bdeb5 whitespace fixes:... |
2784 |
we cannot unload the module, hence no refcnt needed. */ |
1da177e4c Linux-2.6.12-rc2 |
2785 2786 |
return e; } |
4d435f9d8 [PATCH] lockdep: ... |
2787 |
/* |
e610499e2 module: __module_... |
2788 2789 2790 2791 2792 |
* 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: ... |
2793 |
*/ |
e610499e2 module: __module_... |
2794 |
bool is_module_address(unsigned long addr) |
4d435f9d8 [PATCH] lockdep: ... |
2795 |
{ |
e610499e2 module: __module_... |
2796 |
bool ret; |
4d435f9d8 [PATCH] lockdep: ... |
2797 |
|
24da1cbff modules: remove m... |
2798 |
preempt_disable(); |
e610499e2 module: __module_... |
2799 |
ret = __module_address(addr) != NULL; |
24da1cbff modules: remove m... |
2800 |
preempt_enable(); |
4d435f9d8 [PATCH] lockdep: ... |
2801 |
|
e610499e2 module: __module_... |
2802 |
return ret; |
4d435f9d8 [PATCH] lockdep: ... |
2803 |
} |
e610499e2 module: __module_... |
2804 2805 2806 2807 2808 2809 2810 |
/* * __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... |
2811 |
struct module *__module_address(unsigned long addr) |
1da177e4c Linux-2.6.12-rc2 |
2812 2813 |
{ struct module *mod; |
3a642e99b modules: Take a s... |
2814 2815 |
if (addr < module_addr_min || addr > module_addr_max) return NULL; |
d72b37513 Remove stop_machi... |
2816 |
list_for_each_entry_rcu(mod, &modules, list) |
e610499e2 module: __module_... |
2817 2818 |
if (within_module_core(addr, mod) || within_module_init(addr, mod)) |
1da177e4c Linux-2.6.12-rc2 |
2819 2820 2821 |
return mod; return NULL; } |
c6b378019 module: Export sy... |
2822 |
EXPORT_SYMBOL_GPL(__module_address); |
1da177e4c Linux-2.6.12-rc2 |
2823 |
|
e610499e2 module: __module_... |
2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 |
/* * 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... |
2861 |
EXPORT_SYMBOL_GPL(__module_text_address); |
e610499e2 module: __module_... |
2862 |
|
1da177e4c Linux-2.6.12-rc2 |
2863 2864 2865 2866 |
/* Don't grab lock, we're oopsing. */ void print_modules(void) { struct module *mod; |
2bc2d61a9 [PATCH] list modu... |
2867 |
char buf[8]; |
1da177e4c Linux-2.6.12-rc2 |
2868 |
|
b231125af printk: add KERN_... |
2869 |
printk(KERN_DEFAULT "Modules linked in:"); |
d72b37513 Remove stop_machi... |
2870 2871 2872 |
/* Most callers should already have preempt disabled, but make sure */ preempt_disable(); list_for_each_entry_rcu(mod, &modules, list) |
21aa9280b debug: show being... |
2873 |
printk(" %s%s", mod->name, module_flags(mod, buf)); |
d72b37513 Remove stop_machi... |
2874 |
preempt_enable(); |
e14af7eeb debug: track and ... |
2875 2876 |
if (last_unloaded_module[0]) printk(" [last unloaded: %s]", last_unloaded_module); |
1da177e4c Linux-2.6.12-rc2 |
2877 2878 2879 |
printk(" "); } |
1da177e4c Linux-2.6.12-rc2 |
2880 |
#ifdef CONFIG_MODVERSIONS |
8c8ef42ae module: include o... |
2881 2882 2883 2884 2885 2886 |
/* 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, |
8c8ef42ae module: include o... |
2887 2888 2889 2890 |
struct tracepoint *tp) { } EXPORT_SYMBOL(module_layout); |
1da177e4c Linux-2.6.12-rc2 |
2891 |
#endif |
8256e47cd Linux Kernel Markers |
2892 |
|
97e1c18e8 tracing: Kernel T... |
2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 |
#ifdef CONFIG_TRACEPOINTS void module_update_tracepoints(void) { struct module *mod; mutex_lock(&module_mutex); list_for_each_entry(mod, &modules, list) if (!mod->taints) tracepoint_update_probe_range(mod->tracepoints, mod->tracepoints + mod->num_tracepoints); mutex_unlock(&module_mutex); } /* * Returns 0 if current not found. * Returns 1 if current found. */ int module_get_iter_tracepoints(struct tracepoint_iter *iter) { struct module *iter_mod; int found = 0; mutex_lock(&module_mutex); list_for_each_entry(iter_mod, &modules, list) { if (!iter_mod->taints) { /* * Sorted module list */ if (iter_mod < iter->module) continue; else if (iter_mod > iter->module) iter->tracepoint = NULL; found = tracepoint_get_iter_range(&iter->tracepoint, iter_mod->tracepoints, iter_mod->tracepoints + iter_mod->num_tracepoints); if (found) { iter->module = iter_mod; break; } } } mutex_unlock(&module_mutex); return found; } #endif |