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kernel/module.c
76.5 KB
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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 <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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#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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|
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if (each_symbol_in_section(arr, ARRAY_SIZE(arr), NULL, fn, data)) return true; |
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|
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list_for_each_entry_rcu(mod, &modules, list) { |
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struct symsearch arr[] = { { mod->syms, mod->syms + mod->num_syms, mod->crcs, |
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NOT_GPL_ONLY, false }, |
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{ mod->gpl_syms, mod->gpl_syms + mod->num_gpl_syms, |
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mod->gpl_crcs, GPL_ONLY, false }, |
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{ mod->gpl_future_syms, mod->gpl_future_syms + mod->num_gpl_future_syms, |
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mod->gpl_future_crcs, WILL_BE_GPL_ONLY, false }, |
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#ifdef CONFIG_UNUSED_SYMBOLS |
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{ mod->unused_syms, mod->unused_syms + mod->num_unused_syms, |
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mod->unused_crcs, NOT_GPL_ONLY, true }, |
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{ mod->unused_gpl_syms, mod->unused_gpl_syms + mod->num_unused_gpl_syms, |
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mod->unused_gpl_crcs, GPL_ONLY, true }, |
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#endif |
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}; |
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if (each_symbol_in_section(arr, ARRAY_SIZE(arr), mod, fn, data)) return true; } return false; } |
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EXPORT_SYMBOL_GPL(each_symbol); |
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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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#ifdef CONFIG_HAVE_DYNAMIC_PER_CPU_AREA 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); } #else /* ... !CONFIG_HAVE_DYNAMIC_PER_CPU_AREA */ |
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/* Number of blocks used and allocated. */ static unsigned int pcpu_num_used, pcpu_num_allocated; /* Size of each block. -ve means used. */ static int *pcpu_size; static int split_block(unsigned int i, unsigned short size) { /* Reallocation required? */ if (pcpu_num_used + 1 > pcpu_num_allocated) { |
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int *new; new = krealloc(pcpu_size, sizeof(new[0])*pcpu_num_allocated*2, GFP_KERNEL); |
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if (!new) return 0; |
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pcpu_num_allocated *= 2; |
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pcpu_size = new; } /* Insert a new subblock */ memmove(&pcpu_size[i+1], &pcpu_size[i], sizeof(pcpu_size[0]) * (pcpu_num_used - i)); pcpu_num_used++; pcpu_size[i+1] -= size; pcpu_size[i] = size; return 1; } static inline unsigned int block_size(int val) { if (val < 0) return -val; return val; } |
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static void *percpu_modalloc(unsigned long size, unsigned long align, const char *name) |
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{ unsigned long extra; unsigned int i; void *ptr; |
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int cpu; |
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|
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if (align > PAGE_SIZE) { printk(KERN_WARNING "%s: per-cpu alignment %li > %li ", name, align, PAGE_SIZE); align = PAGE_SIZE; |
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} |
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ptr = __per_cpu_start; for (i = 0; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) { /* Extra for alignment requirement. */ extra = ALIGN((unsigned long)ptr, align) - (unsigned long)ptr; BUG_ON(i == 0 && extra != 0); if (pcpu_size[i] < 0 || pcpu_size[i] < extra + size) continue; /* Transfer extra to previous block. */ if (pcpu_size[i-1] < 0) pcpu_size[i-1] -= extra; else pcpu_size[i-1] += extra; pcpu_size[i] -= extra; ptr += extra; /* Split block if warranted */ if (pcpu_size[i] - size > sizeof(unsigned long)) if (!split_block(i, size)) return NULL; |
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/* add the per-cpu scanning areas */ for_each_possible_cpu(cpu) kmemleak_alloc(ptr + per_cpu_offset(cpu), size, 0, GFP_KERNEL); |
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/* Mark allocated */ pcpu_size[i] = -pcpu_size[i]; return ptr; } printk(KERN_WARNING "Could not allocate %lu bytes percpu data ", size); return NULL; } static void percpu_modfree(void *freeme) { unsigned int i; void *ptr = __per_cpu_start + block_size(pcpu_size[0]); |
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int cpu; |
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/* First entry is core kernel percpu data. */ for (i = 1; i < pcpu_num_used; ptr += block_size(pcpu_size[i]), i++) { if (ptr == freeme) { pcpu_size[i] = -pcpu_size[i]; goto free; } } BUG(); free: |
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/* remove the per-cpu scanning areas */ for_each_possible_cpu(cpu) kmemleak_free(freeme + per_cpu_offset(cpu)); |
1da177e4c Linux-2.6.12-rc2 |
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/* Merge with previous? */ if (pcpu_size[i-1] >= 0) { pcpu_size[i-1] += pcpu_size[i]; pcpu_num_used--; memmove(&pcpu_size[i], &pcpu_size[i+1], (pcpu_num_used - i) * sizeof(pcpu_size[0])); i--; } /* Merge with next? */ if (i+1 < pcpu_num_used && pcpu_size[i+1] >= 0) { pcpu_size[i] += pcpu_size[i+1]; pcpu_num_used--; memmove(&pcpu_size[i+1], &pcpu_size[i+2], (pcpu_num_used - (i+1)) * sizeof(pcpu_size[0])); } } |
1da177e4c Linux-2.6.12-rc2 |
506 507 508 509 510 511 512 |
static int percpu_modinit(void) { pcpu_num_used = 2; pcpu_num_allocated = 2; pcpu_size = kmalloc(sizeof(pcpu_size[0]) * pcpu_num_allocated, GFP_KERNEL); /* Static in-kernel percpu data (used). */ |
b00742d39 [PATCH] x86-64: A... |
513 |
pcpu_size[0] = -(__per_cpu_end-__per_cpu_start); |
1da177e4c Linux-2.6.12-rc2 |
514 515 516 517 518 519 520 521 522 |
/* Free room. */ pcpu_size[1] = PERCPU_ENOUGH_ROOM + pcpu_size[0]; if (pcpu_size[1] < 0) { printk(KERN_ERR "No per-cpu room for modules. "); pcpu_num_used = 1; } return 0; |
22a8bdeb5 whitespace fixes:... |
523 |
} |
1da177e4c Linux-2.6.12-rc2 |
524 |
__initcall(percpu_modinit); |
6b588c18f module: reorder m... |
525 |
|
fbf59bc9d percpu: implement... |
526 |
#endif /* CONFIG_HAVE_DYNAMIC_PER_CPU_AREA */ |
6b588c18f module: reorder m... |
527 528 529 530 531 532 533 534 535 536 537 538 539 540 |
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); } |
1da177e4c Linux-2.6.12-rc2 |
541 |
#else /* ... !CONFIG_SMP */ |
6b588c18f module: reorder m... |
542 |
|
842bbaaa7 [PATCH] Module pe... |
543 544 |
static inline void *percpu_modalloc(unsigned long size, unsigned long align, const char *name) |
1da177e4c Linux-2.6.12-rc2 |
545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 |
{ 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); } |
6b588c18f module: reorder m... |
564 |
|
1da177e4c Linux-2.6.12-rc2 |
565 |
#endif /* CONFIG_SMP */ |
c988d2b28 [PATCH] modules: ... |
566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 |
#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) \ { \ |
22a8bdeb5 whitespace fixes:... |
583 584 |
kfree(mod->field); \ mod->field = NULL; \ |
c988d2b28 [PATCH] modules: ... |
585 586 |
} \ static struct module_attribute modinfo_##field = { \ |
7b595756e sysfs: kill unnec... |
587 |
.attr = { .name = __stringify(field), .mode = 0444 }, \ |
c988d2b28 [PATCH] modules: ... |
588 589 590 591 592 593 594 595 |
.show = show_modinfo_##field, \ .setup = setup_modinfo_##field, \ .test = modinfo_##field##_exists, \ .free = free_modinfo_##field, \ }; MODINFO_ATTR(version); MODINFO_ATTR(srcversion); |
e14af7eeb debug: track and ... |
596 |
static char last_unloaded_module[MODULE_NAME_LEN+1]; |
03e88ae1b [PATCH] fix modul... |
597 |
#ifdef CONFIG_MODULE_UNLOAD |
1da177e4c Linux-2.6.12-rc2 |
598 599 600 |
/* Init the unload section of the module. */ static void module_unload_init(struct module *mod) { |
720eba31f modules: Use a be... |
601 |
int cpu; |
1da177e4c Linux-2.6.12-rc2 |
602 603 |
INIT_LIST_HEAD(&mod->modules_which_use_me); |
720eba31f modules: Use a be... |
604 605 |
for_each_possible_cpu(cpu) local_set(__module_ref_addr(mod, cpu), 0); |
1da177e4c Linux-2.6.12-rc2 |
606 |
/* Hold reference count during initialization. */ |
720eba31f modules: Use a be... |
607 |
local_set(__module_ref_addr(mod, raw_smp_processor_id()), 1); |
1da177e4c Linux-2.6.12-rc2 |
608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 |
/* 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... |
637 |
int use_module(struct module *a, struct module *b) |
1da177e4c Linux-2.6.12-rc2 |
638 639 |
{ struct module_use *use; |
c9a3ba55b module: wait for ... |
640 |
int no_warn, err; |
270a6c4ca /sys/modules/*/ho... |
641 |
|
1da177e4c Linux-2.6.12-rc2 |
642 |
if (b == NULL || already_uses(a, b)) return 1; |
c9a3ba55b module: wait for ... |
643 644 645 646 647 648 649 650 651 652 653 654 |
/* 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 |
655 656 657 658 659 660 661 662 663 664 665 666 667 668 |
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... |
669 |
no_warn = sysfs_create_link(b->holders_dir, &a->mkobj.kobj, a->name); |
1da177e4c Linux-2.6.12-rc2 |
670 671 |
return 1; } |
c6b378019 module: Export sy... |
672 |
EXPORT_SYMBOL_GPL(use_module); |
1da177e4c Linux-2.6.12-rc2 |
673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 |
/* 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... |
689 |
sysfs_remove_link(i->holders_dir, mod->name); |
1da177e4c Linux-2.6.12-rc2 |
690 691 692 693 694 695 696 697 |
/* There can be at most one match. */ break; } } } } #ifdef CONFIG_MODULE_FORCE_UNLOAD |
fb1697933 [PATCH] modules: ... |
698 |
static inline int try_force_unload(unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
699 700 701 |
{ int ret = (flags & O_TRUNC); if (ret) |
fb1697933 [PATCH] modules: ... |
702 |
add_taint(TAINT_FORCED_RMMOD); |
1da177e4c Linux-2.6.12-rc2 |
703 704 705 |
return ret; } #else |
fb1697933 [PATCH] modules: ... |
706 |
static inline int try_force_unload(unsigned int flags) |
1da177e4c Linux-2.6.12-rc2 |
707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 |
{ 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... |
723 724 |
/* If it's not unused, quit unless we're forcing. */ if (module_refcount(sref->mod) != 0) { |
fb1697933 [PATCH] modules: ... |
725 |
if (!(*sref->forced = try_force_unload(sref->flags))) |
1da177e4c Linux-2.6.12-rc2 |
726 727 728 729 730 731 732 733 734 735 |
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... |
736 737 |
if (flags & O_NONBLOCK) { struct stopref sref = { mod, flags, forced }; |
1da177e4c Linux-2.6.12-rc2 |
738 |
|
9b1a4d383 stop_machine: Wea... |
739 |
return stop_machine(__try_stop_module, &sref, NULL); |
da39ba5e1 module: don't use... |
740 741 742 743 744 745 |
} 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 |
746 747 748 749 |
} unsigned int module_refcount(struct module *mod) { |
720eba31f modules: Use a be... |
750 751 |
unsigned int total = 0; int cpu; |
1da177e4c Linux-2.6.12-rc2 |
752 |
|
720eba31f modules: Use a be... |
753 754 |
for_each_possible_cpu(cpu) total += local_read(__module_ref_addr(mod, cpu)); |
1da177e4c Linux-2.6.12-rc2 |
755 756 757 758 759 760 761 762 763 |
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... |
764 |
/* Since we might sleep for some time, release the mutex first */ |
6389a3851 [PATCH] kernel/mo... |
765 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
766 767 768 769 770 771 772 773 774 |
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... |
775 |
mutex_lock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
776 |
} |
17da2bd90 [CVE-2009-0029] S... |
777 778 |
SYSCALL_DEFINE2(delete_module, const char __user *, name_user, unsigned int, flags) |
1da177e4c Linux-2.6.12-rc2 |
779 780 |
{ struct module *mod; |
dfff0a067 Revert "Driver co... |
781 |
char name[MODULE_NAME_LEN]; |
1da177e4c Linux-2.6.12-rc2 |
782 |
int ret, forced = 0; |
3d43321b7 modules: sysctl t... |
783 |
if (!capable(CAP_SYS_MODULE) || modules_disabled) |
dfff0a067 Revert "Driver co... |
784 785 786 787 788 |
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... |
789 790 791 792 793 794 795 796 797 798 |
/* 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 |
799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 |
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... |
823 |
if (mod->init && !mod->exit) { |
fb1697933 [PATCH] modules: ... |
824 |
forced = try_force_unload(flags); |
1da177e4c Linux-2.6.12-rc2 |
825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 |
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... |
843 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
844 |
/* Final destruction now noone is using it. */ |
df4b565e1 module: add MODUL... |
845 |
if (mod->exit != NULL) |
1da177e4c Linux-2.6.12-rc2 |
846 |
mod->exit(); |
df4b565e1 module: add MODUL... |
847 848 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); |
22a9d6456 async: Asynchrono... |
849 |
async_synchronize_full(); |
df4b565e1 module: add MODUL... |
850 |
mutex_lock(&module_mutex); |
e14af7eeb debug: track and ... |
851 |
/* Store the name of the last unloaded module for diagnostic purposes */ |
efa5345e3 module: Fix gratu... |
852 |
strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module)); |
e9d376f0f dynamic debug: co... |
853 |
ddebug_remove_module(mod->name); |
1da177e4c Linux-2.6.12-rc2 |
854 855 856 |
free_module(mod); out: |
6389a3851 [PATCH] kernel/mo... |
857 |
mutex_unlock(&module_mutex); |
9e01892c4 module: convert t... |
858 859 |
out_stop: stop_machine_destroy(); |
1da177e4c Linux-2.6.12-rc2 |
860 861 |
return ret; } |
d1e99d7ae module: fix warni... |
862 |
static inline void print_unload_info(struct seq_file *m, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
863 864 865 866 867 868 869 870 871 872 873 874 |
{ 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 |
875 876 877 878 879 880 881 882 883 884 885 886 |
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 |
887 |
|
24da1cbff modules: remove m... |
888 |
preempt_disable(); |
414fd31b2 module: Make find... |
889 |
if (!find_symbol(symbol, &owner, NULL, true, false)) |
1da177e4c Linux-2.6.12-rc2 |
890 891 |
BUG(); module_put(owner); |
24da1cbff modules: remove m... |
892 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
893 894 895 896 897 |
} EXPORT_SYMBOL(__symbol_put); void symbol_put_addr(void *addr) { |
5e3766138 [PATCH] symbol_pu... |
898 |
struct module *modaddr; |
1da177e4c Linux-2.6.12-rc2 |
899 |
|
5e3766138 [PATCH] symbol_pu... |
900 901 |
if (core_kernel_text((unsigned long)addr)) return; |
1da177e4c Linux-2.6.12-rc2 |
902 |
|
a6e6abd57 module: remove mo... |
903 904 905 906 |
/* module_text_address is safe here: we're supposed to have reference * to module from symbol_get, so it can't go away. */ modaddr = __module_text_address((unsigned long)addr); BUG_ON(!modaddr); |
5e3766138 [PATCH] symbol_pu... |
907 |
module_put(modaddr); |
1da177e4c Linux-2.6.12-rc2 |
908 909 910 911 912 913 |
} 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... |
914 915 |
return sprintf(buffer, "%u ", module_refcount(mod)); |
1da177e4c Linux-2.6.12-rc2 |
916 917 918 |
} static struct module_attribute refcnt = { |
7b595756e sysfs: kill unnec... |
919 |
.attr = { .name = "refcnt", .mode = 0444 }, |
1da177e4c Linux-2.6.12-rc2 |
920 921 |
.show = show_refcnt, }; |
f6a570333 [PATCH] severing ... |
922 923 924 925 |
void module_put(struct module *module) { if (module) { unsigned int cpu = get_cpu(); |
720eba31f modules: Use a be... |
926 |
local_dec(__module_ref_addr(module, cpu)); |
f6a570333 [PATCH] severing ... |
927 928 929 930 931 932 933 |
/* 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 |
934 |
#else /* !CONFIG_MODULE_UNLOAD */ |
d1e99d7ae module: fix warni... |
935 |
static inline void print_unload_info(struct seq_file *m, struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
936 937 938 939 940 941 942 943 |
{ /* 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... |
944 |
int use_module(struct module *a, struct module *b) |
1da177e4c Linux-2.6.12-rc2 |
945 |
{ |
c9a3ba55b module: wait for ... |
946 |
return strong_try_module_get(b) == 0; |
1da177e4c Linux-2.6.12-rc2 |
947 |
} |
c6b378019 module: Export sy... |
948 |
EXPORT_SYMBOL_GPL(use_module); |
1da177e4c Linux-2.6.12-rc2 |
949 950 951 952 953 |
static inline void module_unload_init(struct module *mod) { } #endif /* CONFIG_MODULE_UNLOAD */ |
1f71740ab Driver core: show... |
954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 |
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... |
975 |
.attr = { .name = "initstate", .mode = 0444 }, |
1f71740ab Driver core: show... |
976 977 |
.show = show_initstate, }; |
03e88ae1b [PATCH] fix modul... |
978 979 980 |
static struct module_attribute *modinfo_attrs[] = { &modinfo_version, &modinfo_srcversion, |
1f71740ab Driver core: show... |
981 |
&initstate, |
03e88ae1b [PATCH] fix modul... |
982 983 984 985 986 |
#ifdef CONFIG_MODULE_UNLOAD &refcnt, #endif NULL, }; |
1da177e4c Linux-2.6.12-rc2 |
987 |
static const char vermagic[] = VERMAGIC_STRING; |
c6e665c8f module: clarify t... |
988 |
static int try_to_force_load(struct module *mod, const char *reason) |
826e4506a Make forced modul... |
989 990 |
{ #ifdef CONFIG_MODULE_FORCE_LOAD |
25ddbb18a Make the taint fl... |
991 |
if (!test_taint(TAINT_FORCED_MODULE)) |
c6e665c8f module: clarify t... |
992 993 994 |
printk(KERN_WARNING "%s: %s: kernel tainted. ", mod->name, reason); |
826e4506a Make forced modul... |
995 996 997 998 999 1000 |
add_taint_module(mod, TAINT_FORCED_MODULE); return 0; #else return -ENOEXEC; #endif } |
1da177e4c Linux-2.6.12-rc2 |
1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 |
#ifdef CONFIG_MODVERSIONS static int check_version(Elf_Shdr *sechdrs, unsigned int versindex, const char *symname, struct module *mod, const unsigned long *crc) { 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... |
1014 1015 1016 |
/* 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 |
1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 |
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; if (versions[i].crc == *crc) return 1; |
1da177e4c Linux-2.6.12-rc2 |
1027 1028 1029 |
DEBUGP("Found checksum %lX vs module %lX ", *crc, versions[i].crc); |
826e4506a Make forced modul... |
1030 |
goto bad_version; |
1da177e4c Linux-2.6.12-rc2 |
1031 |
} |
826e4506a Make forced modul... |
1032 |
|
a5dd69707 module: be more p... |
1033 1034 1035 1036 |
printk(KERN_WARNING "%s: no symbol version for %s ", mod->name, symname); return 0; |
826e4506a Make forced modul... |
1037 1038 1039 1040 1041 1042 |
bad_version: printk("%s: disagrees about version of symbol %s ", mod->name, symname); return 0; |
1da177e4c Linux-2.6.12-rc2 |
1043 1044 1045 1046 1047 1048 1049 |
} 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 |
1050 |
|
8c8ef42ae module: include o... |
1051 |
if (!find_symbol("module_layout", NULL, &crc, true, false)) |
1da177e4c Linux-2.6.12-rc2 |
1052 |
BUG(); |
8c8ef42ae module: include o... |
1053 |
return check_version(sechdrs, versindex, "module_layout", mod, crc); |
1da177e4c Linux-2.6.12-rc2 |
1054 |
} |
91e37a793 module: don't ign... |
1055 1056 1057 |
/* 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 |
1058 |
{ |
91e37a793 module: don't ign... |
1059 1060 1061 1062 |
if (has_crcs) { amagic += strcspn(amagic, " "); bmagic += strcspn(bmagic, " "); } |
1da177e4c Linux-2.6.12-rc2 |
1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 |
return strcmp(amagic, bmagic) == 0; } #else static inline int check_version(Elf_Shdr *sechdrs, unsigned int versindex, const char *symname, struct module *mod, const unsigned long *crc) { return 1; } static inline int check_modstruct_version(Elf_Shdr *sechdrs, unsigned int versindex, struct module *mod) { return 1; } |
91e37a793 module: don't ign... |
1081 1082 |
static inline int same_magic(const char *amagic, const char *bmagic, bool has_crcs) |
1da177e4c Linux-2.6.12-rc2 |
1083 1084 1085 1086 1087 1088 1089 |
{ 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... |
1090 1091 1092 1093 |
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 |
1094 1095 |
{ struct module *owner; |
414fd31b2 module: Make find... |
1096 |
const struct kernel_symbol *sym; |
1da177e4c Linux-2.6.12-rc2 |
1097 |
const unsigned long *crc; |
414fd31b2 module: Make find... |
1098 |
sym = find_symbol(name, &owner, &crc, |
25ddbb18a Make the taint fl... |
1099 |
!(mod->taints & (1 << TAINT_PROPRIETARY_MODULE)), true); |
414fd31b2 module: Make find... |
1100 1101 1102 |
/* use_module can fail due to OOM, or module initialization or unloading */ if (sym) { |
1da177e4c Linux-2.6.12-rc2 |
1103 1104 |
if (!check_version(sechdrs, versindex, name, mod, crc) || !use_module(mod, owner)) |
414fd31b2 module: Make find... |
1105 |
sym = NULL; |
1da177e4c Linux-2.6.12-rc2 |
1106 |
} |
414fd31b2 module: Make find... |
1107 |
return sym; |
1da177e4c Linux-2.6.12-rc2 |
1108 |
} |
1da177e4c Linux-2.6.12-rc2 |
1109 1110 1111 1112 |
/* * /sys/module/foo/sections stuff * J. Corbet <corbet@lwn.net> */ |
120fc3d77 modules: do not t... |
1113 |
#if defined(CONFIG_KALLSYMS) && defined(CONFIG_SYSFS) |
a58730c42 module: make modu... |
1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 |
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 |
1127 1128 1129 1130 1131 1132 1133 1134 |
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... |
1135 1136 |
static void free_sect_attrs(struct module_sect_attrs *sect_attrs) { |
a58730c42 module: make modu... |
1137 |
unsigned int section; |
04b1db9fd [PATCH] /sys/modu... |
1138 1139 1140 1141 1142 |
for (section = 0; section < sect_attrs->nsections; section++) kfree(sect_attrs->attrs[section].name); kfree(sect_attrs); } |
1da177e4c Linux-2.6.12-rc2 |
1143 1144 1145 1146 1147 1148 1149 |
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:... |
1150 |
|
1da177e4c Linux-2.6.12-rc2 |
1151 1152 1153 1154 1155 1156 1157 1158 |
/* Count loaded sections and allocate structures */ for (i = 0; i < nsect; i++) if (sechdrs[i].sh_flags & SHF_ALLOC) 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... |
1159 1160 |
sect_attrs = kzalloc(size[0] + size[1], GFP_KERNEL); if (sect_attrs == NULL) |
1da177e4c Linux-2.6.12-rc2 |
1161 1162 1163 1164 1165 |
return; /* Setup section attributes. */ sect_attrs->grp.name = "sections"; sect_attrs->grp.attrs = (void *)sect_attrs + size[0]; |
04b1db9fd [PATCH] /sys/modu... |
1166 |
sect_attrs->nsections = 0; |
1da177e4c Linux-2.6.12-rc2 |
1167 1168 1169 1170 1171 1172 |
sattr = §_attrs->attrs[0]; gattr = §_attrs->grp.attrs[0]; for (i = 0; i < nsect; i++) { if (! (sechdrs[i].sh_flags & SHF_ALLOC)) continue; sattr->address = sechdrs[i].sh_addr; |
04b1db9fd [PATCH] /sys/modu... |
1173 1174 1175 1176 1177 |
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 |
1178 1179 1180 |
sattr->mattr.show = module_sect_show; sattr->mattr.store = NULL; sattr->mattr.attr.name = sattr->name; |
1da177e4c Linux-2.6.12-rc2 |
1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 |
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... |
1192 |
free_sect_attrs(sect_attrs); |
1da177e4c Linux-2.6.12-rc2 |
1193 1194 1195 1196 1197 1198 1199 1200 1201 |
} 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... |
1202 |
free_sect_attrs(mod->sect_attrs); |
1da177e4c Linux-2.6.12-rc2 |
1203 1204 1205 |
mod->sect_attrs = NULL; } } |
6d7601338 Add /sys/module/n... |
1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 |
/* * /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... |
1234 |
kobject_put(notes_attrs->dir); |
6d7601338 Add /sys/module/n... |
1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 |
} 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; /* Count notes sections and allocate structures. */ notes = 0; for (i = 0; i < nsect; i++) if ((sechdrs[i].sh_flags & SHF_ALLOC) && (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) { if (!(sechdrs[i].sh_flags & SHF_ALLOC)) 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 ... |
1277 |
notes_attrs->dir = kobject_create_and_add("notes", &mod->mkobj.kobj); |
6d7601338 Add /sys/module/n... |
1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 |
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 |
1298 |
#else |
04b1db9fd [PATCH] /sys/modu... |
1299 |
|
1da177e4c Linux-2.6.12-rc2 |
1300 1301 1302 1303 1304 1305 1306 1307 |
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... |
1308 1309 1310 1311 1312 1313 1314 1315 1316 |
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... |
1317 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
1318 |
|
ef665c1a0 sysfs: fix build ... |
1319 1320 |
#ifdef CONFIG_SYSFS int module_add_modinfo_attrs(struct module *mod) |
c988d2b28 [PATCH] modules: ... |
1321 1322 |
{ struct module_attribute *attr; |
03e88ae1b [PATCH] fix modul... |
1323 |
struct module_attribute *temp_attr; |
c988d2b28 [PATCH] modules: ... |
1324 1325 |
int error = 0; int i; |
03e88ae1b [PATCH] fix modul... |
1326 1327 1328 1329 1330 1331 1332 |
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: ... |
1333 1334 |
for (i = 0; (attr = modinfo_attrs[i]) && !error; i++) { if (!attr->test || |
03e88ae1b [PATCH] fix modul... |
1335 1336 |
(attr->test && attr->test(mod))) { memcpy(temp_attr, attr, sizeof(*temp_attr)); |
03e88ae1b [PATCH] fix modul... |
1337 1338 1339 |
error = sysfs_create_file(&mod->mkobj.kobj,&temp_attr->attr); ++temp_attr; } |
c988d2b28 [PATCH] modules: ... |
1340 1341 1342 |
} return error; } |
ef665c1a0 sysfs: fix build ... |
1343 |
void module_remove_modinfo_attrs(struct module *mod) |
c988d2b28 [PATCH] modules: ... |
1344 1345 1346 |
{ struct module_attribute *attr; int i; |
03e88ae1b [PATCH] fix modul... |
1347 1348 1349 1350 |
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: ... |
1351 |
sysfs_remove_file(&mod->mkobj.kobj,&attr->attr); |
03e88ae1b [PATCH] fix modul... |
1352 1353 |
if (attr->free) attr->free(mod); |
c988d2b28 [PATCH] modules: ... |
1354 |
} |
03e88ae1b [PATCH] fix modul... |
1355 |
kfree(mod->modinfo_attrs); |
c988d2b28 [PATCH] modules: ... |
1356 |
} |
1da177e4c Linux-2.6.12-rc2 |
1357 |
|
ef665c1a0 sysfs: fix build ... |
1358 |
int mod_sysfs_init(struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1359 1360 |
{ int err; |
6494a93d5 Module: check to ... |
1361 |
struct kobject *kobj; |
1da177e4c Linux-2.6.12-rc2 |
1362 |
|
823bccfc4 remove "struct su... |
1363 1364 1365 |
if (!module_sysfs_initialized) { printk(KERN_ERR "%s: module sysfs not initialized ", |
1cc5f7142 [PATCH] load_modu... |
1366 1367 1368 1369 |
mod->name); err = -EINVAL; goto out; } |
6494a93d5 Module: check to ... |
1370 1371 1372 1373 1374 1375 1376 1377 1378 |
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 |
1379 |
mod->mkobj.mod = mod; |
e17e0f51a Driver core: show... |
1380 |
|
ac3c8141f Kobject: convert ... |
1381 1382 1383 1384 1385 1386 |
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... |
1387 |
|
97c146ef0 sysfs: fix /sys/m... |
1388 |
/* delay uevent until full sysfs population */ |
270a6c4ca /sys/modules/*/ho... |
1389 1390 1391 |
out: return err; } |
ef665c1a0 sysfs: fix build ... |
1392 |
int mod_sysfs_setup(struct module *mod, |
270a6c4ca /sys/modules/*/ho... |
1393 1394 1395 1396 |
struct kernel_param *kparam, unsigned int num_params) { int err; |
4ff6abff8 kobject: get rid ... |
1397 |
mod->holders_dir = kobject_create_and_add("holders", &mod->mkobj.kobj); |
240936e18 mod_sysfs_setup()... |
1398 1399 |
if (!mod->holders_dir) { err = -ENOMEM; |
270a6c4ca /sys/modules/*/ho... |
1400 |
goto out_unreg; |
240936e18 mod_sysfs_setup()... |
1401 |
} |
270a6c4ca /sys/modules/*/ho... |
1402 |
|
1da177e4c Linux-2.6.12-rc2 |
1403 1404 |
err = module_param_sysfs_setup(mod, kparam, num_params); if (err) |
270a6c4ca /sys/modules/*/ho... |
1405 |
goto out_unreg_holders; |
1da177e4c Linux-2.6.12-rc2 |
1406 |
|
c988d2b28 [PATCH] modules: ... |
1407 1408 |
err = module_add_modinfo_attrs(mod); if (err) |
e17e0f51a Driver core: show... |
1409 |
goto out_unreg_param; |
c988d2b28 [PATCH] modules: ... |
1410 |
|
e17e0f51a Driver core: show... |
1411 |
kobject_uevent(&mod->mkobj.kobj, KOBJ_ADD); |
1da177e4c Linux-2.6.12-rc2 |
1412 |
return 0; |
e17e0f51a Driver core: show... |
1413 1414 |
out_unreg_param: module_param_sysfs_remove(mod); |
270a6c4ca /sys/modules/*/ho... |
1415 |
out_unreg_holders: |
78a2d906b Kobject: convert ... |
1416 |
kobject_put(mod->holders_dir); |
270a6c4ca /sys/modules/*/ho... |
1417 |
out_unreg: |
e17e0f51a Driver core: show... |
1418 |
kobject_put(&mod->mkobj.kobj); |
1da177e4c Linux-2.6.12-rc2 |
1419 1420 |
return err; } |
34e4e2fef modules: proper c... |
1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 |
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 |
1434 1435 1436 |
static void mod_kobject_remove(struct module *mod) { |
c988d2b28 [PATCH] modules: ... |
1437 |
module_remove_modinfo_attrs(mod); |
1da177e4c Linux-2.6.12-rc2 |
1438 |
module_param_sysfs_remove(mod); |
78a2d906b Kobject: convert ... |
1439 1440 |
kobject_put(mod->mkobj.drivers_dir); kobject_put(mod->holders_dir); |
34e4e2fef modules: proper c... |
1441 |
mod_sysfs_fini(mod); |
1da177e4c Linux-2.6.12-rc2 |
1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 |
} /* * 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 ... |
1454 |
/* Free a module, remove from lists, etc (must hold module_mutex). */ |
1da177e4c Linux-2.6.12-rc2 |
1455 1456 1457 |
static void free_module(struct module *mod) { /* Delete from various lists */ |
9b1a4d383 stop_machine: Wea... |
1458 |
stop_machine(__unlink_module, mod, NULL); |
6d7601338 Add /sys/module/n... |
1459 |
remove_notes_attrs(mod); |
1da177e4c Linux-2.6.12-rc2 |
1460 1461 1462 1463 1464 1465 1466 1467 |
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 ... |
1468 1469 |
/* Free any allocated parameters. */ destroy_params(mod->kp, mod->num_kp); |
1da177e4c Linux-2.6.12-rc2 |
1470 1471 1472 1473 1474 |
/* 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... |
1475 1476 1477 1478 |
#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP) if (mod->refptr) percpu_modfree(mod->refptr); #endif |
fbb9ce953 [PATCH] lockdep: ... |
1479 1480 |
/* Free lock-classes: */ lockdep_free_key_range(mod->module_core, mod->core_size); |
1da177e4c Linux-2.6.12-rc2 |
1481 1482 1483 1484 1485 1486 1487 |
/* Finally, free the core (containing the module structure) */ module_free(mod, mod->module_core); } void *__symbol_get(const char *symbol) { struct module *owner; |
414fd31b2 module: Make find... |
1488 |
const struct kernel_symbol *sym; |
1da177e4c Linux-2.6.12-rc2 |
1489 |
|
24da1cbff modules: remove m... |
1490 |
preempt_disable(); |
414fd31b2 module: Make find... |
1491 1492 1493 |
sym = find_symbol(symbol, &owner, NULL, true, true); if (sym && strong_try_module_get(owner)) sym = NULL; |
24da1cbff modules: remove m... |
1494 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
1495 |
|
414fd31b2 module: Make find... |
1496 |
return sym ? (void *)sym->value : NULL; |
1da177e4c Linux-2.6.12-rc2 |
1497 1498 |
} EXPORT_SYMBOL_GPL(__symbol_get); |
eea8b54dc [PATCH] modules: ... |
1499 1500 |
/* * Ensure that an exported symbol [global namespace] does not already exist |
02a3e59a0 Fix minor typoes ... |
1501 |
* in the kernel or in some other module's exported symbol table. |
eea8b54dc [PATCH] modules: ... |
1502 1503 1504 |
*/ static int verify_export_symbols(struct module *mod) { |
b211104d1 module: Enhance v... |
1505 |
unsigned int i; |
eea8b54dc [PATCH] modules: ... |
1506 |
struct module *owner; |
b211104d1 module: Enhance v... |
1507 1508 1509 1510 1511 1512 1513 1514 |
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... |
1515 |
#ifdef CONFIG_UNUSED_SYMBOLS |
b211104d1 module: Enhance v... |
1516 1517 |
{ mod->unused_syms, mod->num_unused_syms }, { mod->unused_gpl_syms, mod->num_unused_gpl_syms }, |
f7f5b6755 Shrink struct mod... |
1518 |
#endif |
b211104d1 module: Enhance v... |
1519 |
}; |
eea8b54dc [PATCH] modules: ... |
1520 |
|
b211104d1 module: Enhance v... |
1521 1522 |
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... |
1523 |
if (find_symbol(s->name, &owner, NULL, true, false)) { |
b211104d1 module: Enhance v... |
1524 1525 1526 1527 1528 1529 1530 |
printk(KERN_ERR "%s: exports duplicate symbol %s" " (owned by %s) ", mod->name, s->name, module_name(owner)); return -ENOEXEC; } |
eea8b54dc [PATCH] modules: ... |
1531 |
} |
b211104d1 module: Enhance v... |
1532 1533 |
} return 0; |
eea8b54dc [PATCH] modules: ... |
1534 |
} |
9a4b9708f module: fix and e... |
1535 |
/* Change all symbols so that st_value encodes the pointer directly. */ |
1da177e4c Linux-2.6.12-rc2 |
1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 |
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... |
1547 |
const struct kernel_symbol *ksym; |
1da177e4c Linux-2.6.12-rc2 |
1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 |
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... |
1570 1571 |
ksym = resolve_symbol(sechdrs, versindex, strtab + sym[i].st_name, mod); |
1da177e4c Linux-2.6.12-rc2 |
1572 |
/* Ok if resolved. */ |
414fd31b2 module: Make find... |
1573 1574 |
if (ksym) { sym[i].st_value = ksym->value; |
1da177e4c Linux-2.6.12-rc2 |
1575 |
break; |
414fd31b2 module: Make find... |
1576 |
} |
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 |
/* 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... |
1600 1601 1602 1603 1604 1605 1606 |
/* 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 |
1607 |
/* Update size with this section: return offset. */ |
088af9a6e module: fix modul... |
1608 1609 |
static long get_offset(struct module *mod, unsigned int *size, Elf_Shdr *sechdr, unsigned int section) |
1da177e4c Linux-2.6.12-rc2 |
1610 1611 |
{ long ret; |
088af9a6e module: fix modul... |
1612 |
*size += arch_mod_section_prepend(mod, section); |
1da177e4c Linux-2.6.12-rc2 |
1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 |
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... |
1650 |
|| strstarts(secstrings + s->sh_name, ".init")) |
1da177e4c Linux-2.6.12-rc2 |
1651 |
continue; |
088af9a6e module: fix modul... |
1652 |
s->sh_entsize = get_offset(mod, &mod->core_size, s, i); |
1da177e4c Linux-2.6.12-rc2 |
1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 |
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... |
1669 |
|| !strstarts(secstrings + s->sh_name, ".init")) |
1da177e4c Linux-2.6.12-rc2 |
1670 |
continue; |
088af9a6e module: fix modul... |
1671 |
s->sh_entsize = (get_offset(mod, &mod->init_size, s, i) |
1da177e4c Linux-2.6.12-rc2 |
1672 1673 1674 1675 1676 1677 1678 1679 |
| 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 |
1680 1681 1682 1683 |
static void set_license(struct module *mod, const char *license) { if (!license) license = "unspecified"; |
fa3ba2e81 [PATCH] fix Modul... |
1684 |
if (!license_is_gpl_compatible(license)) { |
25ddbb18a Make the taint fl... |
1685 |
if (!test_taint(TAINT_PROPRIETARY_MODULE)) |
1d4d26276 [PATCH] Add missi... |
1686 |
printk(KERN_WARNING "%s: module license '%s' taints " |
fa3ba2e81 [PATCH] fix Modul... |
1687 1688 1689 |
"kernel. ", mod->name, license); add_taint_module(mod, TAINT_PROPRIETARY_MODULE); |
1da177e4c Linux-2.6.12-rc2 |
1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 |
} } /* 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: ... |
1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 |
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: ... |
1740 |
|
1da177e4c Linux-2.6.12-rc2 |
1741 |
#ifdef CONFIG_KALLSYMS |
15bba37d6 module: fix build... |
1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 |
/* 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: ... |
1754 1755 |
static int is_exported(const char *name, unsigned long value, const struct module *mod) |
1da177e4c Linux-2.6.12-rc2 |
1756 |
{ |
ca4787b77 kernel/module.c: ... |
1757 1758 1759 |
const struct kernel_symbol *ks; if (!mod) ks = lookup_symbol(name, __start___ksymtab, __stop___ksymtab); |
3fd6805f4 [PATCH] Clean up ... |
1760 |
else |
ca4787b77 kernel/module.c: ... |
1761 1762 |
ks = lookup_symbol(name, mod->syms, mod->syms + mod->num_syms); return ks != NULL && ks->value == value; |
1da177e4c Linux-2.6.12-rc2 |
1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 |
} /* 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... |
1800 |
if (strstarts(secstrings + sechdrs[sym->st_shndx].sh_name, ".debug")) |
1da177e4c Linux-2.6.12-rc2 |
1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 |
return 'n'; return '?'; } static void add_kallsyms(struct module *mod, Elf_Shdr *sechdrs, unsigned int symindex, unsigned int strindex, const char *secstrings) { unsigned int i; 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); } #else static inline void add_kallsyms(struct module *mod, Elf_Shdr *sechdrs, unsigned int symindex, unsigned int strindex, const char *secstrings) { } #endif /* CONFIG_KALLSYMS */ |
e9d376f0f dynamic debug: co... |
1831 |
static void dynamic_debug_setup(struct _ddebug *debug, unsigned int num) |
346e15beb driver core: basi... |
1832 |
{ |
e9d376f0f dynamic debug: co... |
1833 1834 1835 1836 1837 1838 |
#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 ... |
1839 |
} |
346e15beb driver core: basi... |
1840 |
|
3a642e99b modules: Take a s... |
1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 |
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... |
1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 |
#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 */ kmemleak_scan_area(mod->module_core, (unsigned long)mod - (unsigned long)mod->module_core, sizeof(struct module), GFP_KERNEL); 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; kmemleak_scan_area(mod->module_core, sechdrs[i].sh_addr - (unsigned long)mod->module_core, 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 |
1883 1884 |
/* 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... |
1885 |
static noinline struct module *load_module(void __user *umod, |
1da177e4c Linux-2.6.12-rc2 |
1886 1887 1888 1889 1890 1891 |
unsigned long len, const char __user *uargs) { Elf_Ehdr *hdr; Elf_Shdr *sechdrs; char *secstrings, *args, *modmagic, *strtab = NULL; |
061b1bd39 Staging: add TAIN... |
1892 |
char *staging; |
84860f997 [PATCH] load_modu... |
1893 1894 1895 |
unsigned int i; unsigned int symindex = 0; unsigned int strindex = 0; |
5e458cc0f module: simplify ... |
1896 |
unsigned int modindex, versindex, infoindex, pcpuindex; |
1da177e4c Linux-2.6.12-rc2 |
1897 1898 1899 |
struct module *mod; long err = 0; void *percpu = NULL, *ptr = NULL; /* Stops spurious gcc warning */ |
378bac820 [PATCH] flush ica... |
1900 |
mm_segment_t old_fs; |
1da177e4c Linux-2.6.12-rc2 |
1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 |
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... |
1912 |
|
1da177e4c Linux-2.6.12-rc2 |
1913 1914 1915 1916 1917 1918 1919 |
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... |
1920 |
if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0 |
1da177e4c Linux-2.6.12-rc2 |
1921 1922 1923 1924 1925 1926 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 |
|| 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... |
1953 |
if (strstarts(secstrings+sechdrs[i].sh_name, ".exit")) |
1da177e4c Linux-2.6.12-rc2 |
1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 |
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 ... |
1966 |
/* This is temporary: point mod into copy of data. */ |
1da177e4c Linux-2.6.12-rc2 |
1967 1968 1969 1970 1971 1972 1973 1974 1975 |
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 |
1976 1977 1978 |
versindex = find_sec(hdr, sechdrs, secstrings, "__versions"); infoindex = find_sec(hdr, sechdrs, secstrings, ".modinfo"); pcpuindex = find_pcpusec(hdr, sechdrs, secstrings); |
ea01e798e module: reduce mo... |
1979 |
/* Don't keep modinfo and version sections. */ |
1da177e4c Linux-2.6.12-rc2 |
1980 |
sechdrs[infoindex].sh_flags &= ~(unsigned long)SHF_ALLOC; |
ea01e798e module: reduce mo... |
1981 |
sechdrs[versindex].sh_flags &= ~(unsigned long)SHF_ALLOC; |
1da177e4c Linux-2.6.12-rc2 |
1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 |
#ifdef CONFIG_KALLSYMS /* Keep symbol and string tables for decoding later. */ sechdrs[symindex].sh_flags |= SHF_ALLOC; sechdrs[strindex].sh_flags |= SHF_ALLOC; #endif /* 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... |
1997 |
err = try_to_force_load(mod, "bad vermagic"); |
826e4506a Make forced modul... |
1998 1999 |
if (err) goto free_hdr; |
91e37a793 module: don't ign... |
2000 |
} else if (!same_magic(modmagic, vermagic, versindex)) { |
1da177e4c Linux-2.6.12-rc2 |
2001 2002 2003 2004 2005 2006 |
printk(KERN_ERR "%s: version magic '%s' should be '%s' ", mod->name, modmagic, vermagic); err = -ENOEXEC; goto free_hdr; } |
061b1bd39 Staging: add TAIN... |
2007 2008 2009 2010 2011 2012 2013 2014 |
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 |
2015 |
/* Now copy in args */ |
24277dda3 [PATCH] strndup_u... |
2016 2017 2018 |
args = strndup_user(uargs, ~0UL >> 1); if (IS_ERR(args)) { err = PTR_ERR(args); |
1da177e4c Linux-2.6.12-rc2 |
2019 2020 |
goto free_hdr; } |
8e08b7568 [PATCH] module: s... |
2021 |
|
1da177e4c Linux-2.6.12-rc2 |
2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 |
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... |
2037 2038 |
sechdrs[pcpuindex].sh_addralign, mod->name); |
1da177e4c Linux-2.6.12-rc2 |
2039 2040 |
if (!percpu) { err = -ENOMEM; |
6e2b75740 module: fix refpt... |
2041 |
goto free_mod; |
1da177e4c Linux-2.6.12-rc2 |
2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 |
} 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); /* Do the allocs. */ |
3a642e99b modules: Take a s... |
2053 |
ptr = module_alloc_update_bounds(mod->core_size); |
4f2294b6d kmemleak: Add mod... |
2054 2055 2056 2057 2058 2059 |
/* * 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 |
2060 2061 2062 2063 2064 2065 |
if (!ptr) { err = -ENOMEM; goto free_percpu; } memset(ptr, 0, mod->core_size); mod->module_core = ptr; |
3a642e99b modules: Take a s... |
2066 |
ptr = module_alloc_update_bounds(mod->init_size); |
4f2294b6d kmemleak: Add mod... |
2067 2068 2069 2070 2071 2072 2073 |
/* * 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 |
2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 |
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... |
2106 |
kmemleak_load_module(mod, hdr, sechdrs, secstrings); |
1da177e4c Linux-2.6.12-rc2 |
2107 |
|
6e2b75740 module: fix refpt... |
2108 2109 2110 2111 2112 2113 2114 2115 |
#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 |
2116 2117 |
/* Now we've moved module, initialize linked lists, etc. */ module_unload_init(mod); |
97c146ef0 sysfs: fix /sys/m... |
2118 |
/* add kobject, so we can reference it. */ |
d58ae6781 module: return er... |
2119 2120 |
err = mod_sysfs_init(mod); if (err) |
97c146ef0 sysfs: fix /sys/m... |
2121 |
goto free_unload; |
270a6c4ca /sys/modules/*/ho... |
2122 |
|
1da177e4c Linux-2.6.12-rc2 |
2123 2124 |
/* Set up license info based on the info section */ set_license(mod, get_modinfo(sechdrs, infoindex, "license")); |
9b37ccfc6 module: allow ndi... |
2125 2126 2127 2128 2129 |
/* * 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... |
2130 |
if (strcmp(mod->name, "ndiswrapper") == 0) |
9b37ccfc6 module: allow ndi... |
2131 2132 2133 |
add_taint(TAINT_PROPRIETARY_MODULE); /* driverloader was caught wrongly pretending to be under GPL */ |
fa3ba2e81 [PATCH] fix Modul... |
2134 2135 |
if (strcmp(mod->name, "driverloader") == 0) add_taint_module(mod, TAINT_PROPRIETARY_MODULE); |
9841d61d7 [PATCH] Add taint... |
2136 |
|
c988d2b28 [PATCH] modules: ... |
2137 2138 |
/* Set up MODINFO_ATTR fields */ setup_modinfo(mod, sechdrs, infoindex); |
c988d2b28 [PATCH] modules: ... |
2139 |
|
1da177e4c Linux-2.6.12-rc2 |
2140 2141 2142 2143 2144 |
/* 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 ... |
2145 2146 |
/* Now we've got everything in the final locations, we can * find optional sections. */ |
e180a6b77 param: fix charp ... |
2147 2148 |
mod->kp = section_objs(hdr, sechdrs, secstrings, "__param", sizeof(*mod->kp), &mod->num_kp); |
5e458cc0f module: simplify ... |
2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 |
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 |
2162 |
|
f7f5b6755 Shrink struct mod... |
2163 |
#ifdef CONFIG_UNUSED_SYMBOLS |
5e458cc0f module: simplify ... |
2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 |
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... |
2177 2178 2179 2180 |
#ifdef CONFIG_CONSTRUCTORS mod->ctors = section_objs(hdr, sechdrs, secstrings, ".ctors", sizeof(*mod->ctors), &mod->num_ctors); #endif |
5e458cc0f module: simplify ... |
2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 |
#ifdef CONFIG_MARKERS mod->markers = section_objs(hdr, sechdrs, secstrings, "__markers", sizeof(*mod->markers), &mod->num_markers); #endif #ifdef CONFIG_TRACEPOINTS mod->tracepoints = section_objs(hdr, sechdrs, secstrings, "__tracepoints", sizeof(*mod->tracepoints), &mod->num_tracepoints); |
f7f5b6755 Shrink struct mod... |
2191 |
#endif |
6d723736e tracing/events: a... |
2192 2193 2194 2195 2196 2197 |
#ifdef CONFIG_EVENT_TRACING mod->trace_events = section_objs(hdr, sechdrs, secstrings, "_ftrace_events", sizeof(*mod->trace_events), &mod->num_trace_events); #endif |
93eb677d7 ftrace: use modul... |
2198 2199 2200 2201 2202 2203 2204 |
#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 |
2205 |
#ifdef CONFIG_MODVERSIONS |
5e458cc0f module: simplify ... |
2206 2207 2208 |
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... |
2209 |
#ifdef CONFIG_UNUSED_SYMBOLS |
5e458cc0f module: simplify ... |
2210 2211 |
|| (mod->num_unused_syms && !mod->unused_crcs) || (mod->num_unused_gpl_syms && !mod->unused_gpl_crcs) |
f7f5b6755 Shrink struct mod... |
2212 2213 |
#endif ) { |
c6e665c8f module: clarify t... |
2214 2215 |
err = try_to_force_load(mod, "no versions for exported symbols"); |
826e4506a Make forced modul... |
2216 2217 |
if (err) goto cleanup; |
1da177e4c Linux-2.6.12-rc2 |
2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 |
} #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: ... |
2242 2243 |
/* Find duplicate symbols */ err = verify_export_symbols(mod); |
eea8b54dc [PATCH] modules: ... |
2244 2245 |
if (err < 0) goto cleanup; |
1da177e4c Linux-2.6.12-rc2 |
2246 |
/* Set up and sort exception table */ |
5e458cc0f module: simplify ... |
2247 2248 2249 |
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 |
2250 2251 2252 2253 2254 2255 |
/* Finally, copy percpu area over. */ percpu_modcopy(mod->percpu, (void *)sechdrs[pcpuindex].sh_addr, sechdrs[pcpuindex].sh_size); add_kallsyms(mod, sechdrs, symindex, strindex, secstrings); |
97e1c18e8 tracing: Kernel T... |
2256 |
if (!mod->taints) { |
e9d376f0f dynamic debug: co... |
2257 |
struct _ddebug *debug; |
5e458cc0f module: simplify ... |
2258 |
unsigned int num_debug; |
5e458cc0f module: simplify ... |
2259 2260 |
debug = section_objs(hdr, sechdrs, secstrings, "__verbose", sizeof(*debug), &num_debug); |
e9d376f0f dynamic debug: co... |
2261 2262 |
if (debug) dynamic_debug_setup(debug, num_debug); |
97e1c18e8 tracing: Kernel T... |
2263 |
} |
90d595fe5 ftrace: enable mc... |
2264 |
|
1da177e4c Linux-2.6.12-rc2 |
2265 2266 2267 |
err = module_finalize(hdr, sechdrs, mod); if (err < 0) goto cleanup; |
378bac820 [PATCH] flush ica... |
2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 |
/* 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 |
2285 |
mod->args = args; |
5e458cc0f module: simplify ... |
2286 |
if (section_addr(hdr, sechdrs, secstrings, "__obsparm")) |
8d3b33f67 [PATCH] Remove MO... |
2287 2288 2289 |
printk(KERN_WARNING "%s: Ignoring obsolete parameters ", mod->name); |
bb9d3d56e module: better OO... |
2290 |
/* Now sew it into the lists so we can get lockdep and oops |
d72b37513 Remove stop_machi... |
2291 2292 2293 2294 2295 2296 2297 |
* 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... |
2298 |
|
e180a6b77 param: fix charp ... |
2299 |
err = parse_args(mod->name, mod->args, mod->kp, mod->num_kp, NULL); |
1da177e4c Linux-2.6.12-rc2 |
2300 |
if (err < 0) |
bb9d3d56e module: better OO... |
2301 |
goto unlink; |
1da177e4c Linux-2.6.12-rc2 |
2302 |
|
e180a6b77 param: fix charp ... |
2303 |
err = mod_sysfs_setup(mod, mod->kp, mod->num_kp); |
1da177e4c Linux-2.6.12-rc2 |
2304 |
if (err < 0) |
bb9d3d56e module: better OO... |
2305 |
goto unlink; |
1da177e4c Linux-2.6.12-rc2 |
2306 |
add_sect_attrs(mod, hdr->e_shnum, secstrings, sechdrs); |
6d7601338 Add /sys/module/n... |
2307 |
add_notes_attrs(mod, hdr->e_shnum, secstrings, sechdrs); |
1da177e4c Linux-2.6.12-rc2 |
2308 2309 2310 2311 2312 2313 |
/* Get rid of temporary copy */ vfree(hdr); /* Done! */ return mod; |
bb9d3d56e module: better OO... |
2314 |
unlink: |
e91defa26 module: don't use... |
2315 2316 2317 |
/* Unlink carefully: kallsyms could be walking list. */ list_del_rcu(&mod->list); synchronize_sched(); |
1da177e4c Linux-2.6.12-rc2 |
2318 2319 |
module_arch_cleanup(mod); cleanup: |
97c146ef0 sysfs: fix /sys/m... |
2320 2321 2322 |
kobject_del(&mod->mkobj.kobj); kobject_put(&mod->mkobj.kobj); free_unload: |
1da177e4c Linux-2.6.12-rc2 |
2323 |
module_unload_free(mod); |
6e2b75740 module: fix refpt... |
2324 |
#if defined(CONFIG_MODULE_UNLOAD) && defined(CONFIG_SMP) |
b10153fe3 kernel/module.c: ... |
2325 |
free_init: |
6e2b75740 module: fix refpt... |
2326 2327 |
percpu_modfree(mod->refptr); #endif |
1da177e4c Linux-2.6.12-rc2 |
2328 2329 2330 |
module_free(mod, mod->module_init); free_core: module_free(mod, mod->module_core); |
6e2b75740 module: fix refpt... |
2331 |
/* mod will be freed with core. Don't access it beyond this line! */ |
1da177e4c Linux-2.6.12-rc2 |
2332 2333 2334 2335 2336 2337 2338 |
free_percpu: if (percpu) percpu_modfree(percpu); free_mod: kfree(args); free_hdr: vfree(hdr); |
6fe2e70bb [PATCH] kernel/mo... |
2339 |
return ERR_PTR(err); |
1da177e4c Linux-2.6.12-rc2 |
2340 2341 2342 2343 2344 2345 2346 |
truncated: printk(KERN_ERR "Module len %lu truncated ", len); err = -ENOEXEC; goto free_hdr; } |
b99b87f70 kernel: construct... |
2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 |
/* 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 |
2357 |
/* This is where the real work happens */ |
17da2bd90 [CVE-2009-0029] S... |
2358 2359 |
SYSCALL_DEFINE3(init_module, void __user *, umod, unsigned long, len, const char __user *, uargs) |
1da177e4c Linux-2.6.12-rc2 |
2360 2361 2362 2363 2364 |
{ struct module *mod; int ret = 0; /* Must have permission */ |
3d43321b7 modules: sysctl t... |
2365 |
if (!capable(CAP_SYS_MODULE) || modules_disabled) |
1da177e4c Linux-2.6.12-rc2 |
2366 2367 2368 |
return -EPERM; /* Only one module load at a time, please */ |
6389a3851 [PATCH] kernel/mo... |
2369 |
if (mutex_lock_interruptible(&module_mutex) != 0) |
1da177e4c Linux-2.6.12-rc2 |
2370 2371 2372 2373 2374 |
return -EINTR; /* Do all the hard work */ mod = load_module(umod, len, uargs); if (IS_ERR(mod)) { |
6389a3851 [PATCH] kernel/mo... |
2375 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
2376 2377 |
return PTR_ERR(mod); } |
1da177e4c Linux-2.6.12-rc2 |
2378 |
/* Drop lock so they can recurse */ |
6389a3851 [PATCH] kernel/mo... |
2379 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
2380 |
|
e041c6834 [PATCH] Notifier ... |
2381 2382 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_COMING, mod); |
1da177e4c Linux-2.6.12-rc2 |
2383 |
|
b99b87f70 kernel: construct... |
2384 |
do_mod_ctors(mod); |
1da177e4c Linux-2.6.12-rc2 |
2385 2386 |
/* Start the module */ if (mod->init != NULL) |
59f9415ff modules: extend i... |
2387 |
ret = do_one_initcall(mod->init); |
1da177e4c Linux-2.6.12-rc2 |
2388 2389 2390 2391 |
if (ret < 0) { /* Init routine failed: abort. Try to protect us from buggy refcounters. */ mod->state = MODULE_STATE_GOING; |
fbd568a3e [PATCH] Change sy... |
2392 |
synchronize_sched(); |
af49d9248 Remove "unsafe" f... |
2393 |
module_put(mod); |
df4b565e1 module: add MODUL... |
2394 2395 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING, mod); |
af49d9248 Remove "unsafe" f... |
2396 2397 2398 |
mutex_lock(&module_mutex); free_module(mod); mutex_unlock(&module_mutex); |
c9a3ba55b module: wait for ... |
2399 |
wake_up(&module_wq); |
1da177e4c Linux-2.6.12-rc2 |
2400 2401 |
return ret; } |
e24e2e64c modules: warn abo... |
2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 |
if (ret > 0) { printk(KERN_WARNING "%s: '%s'->init suspiciously returned %d, " "it should follow 0/-E convention " KERN_WARNING "%s: loading module anyway... ", __func__, mod->name, ret, __func__); dump_stack(); } |
1da177e4c Linux-2.6.12-rc2 |
2412 |
|
6c5db22d2 modules: fix modu... |
2413 |
/* Now it's a first class citizen! Wake up anyone waiting for it. */ |
1da177e4c Linux-2.6.12-rc2 |
2414 |
mod->state = MODULE_STATE_LIVE; |
6c5db22d2 modules: fix modu... |
2415 |
wake_up(&module_wq); |
0deddf436 module: add MODUL... |
2416 2417 |
blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_LIVE, mod); |
6c5db22d2 modules: fix modu... |
2418 |
|
d6de2c80e async: Fix module... |
2419 2420 |
/* We need to finish all async code before the module init sequence is done */ async_synchronize_full(); |
6c5db22d2 modules: fix modu... |
2421 |
mutex_lock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
2422 2423 |
/* Drop initial reference. */ module_put(mod); |
ad6561dff module: trim exce... |
2424 |
trim_init_extable(mod); |
1da177e4c Linux-2.6.12-rc2 |
2425 2426 2427 2428 |
module_free(mod, mod->module_init); mod->module_init = NULL; mod->init_size = 0; mod->init_text_size = 0; |
6389a3851 [PATCH] kernel/mo... |
2429 |
mutex_unlock(&module_mutex); |
1da177e4c Linux-2.6.12-rc2 |
2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 |
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 $d. */ static inline int is_arm_mapping_symbol(const char *str) { |
22a8bdeb5 whitespace fixes:... |
2446 |
return str[0] == '$' && strchr("atd", str[1]) |
1da177e4c Linux-2.6.12-rc2 |
2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 |
&& (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... |
2459 |
if (within_module_init(addr, mod)) |
1da177e4c Linux-2.6.12-rc2 |
2460 |
nextval = (unsigned long)mod->module_init+mod->init_text_size; |
22a8bdeb5 whitespace fixes:... |
2461 |
else |
1da177e4c Linux-2.6.12-rc2 |
2462 2463 2464 |
nextval = (unsigned long)mod->module_core+mod->core_text_size; /* Scan for closest preceeding symbol, and next symbol. (ELF |
22a8bdeb5 whitespace fixes:... |
2465 |
starts real symbols at 1). */ |
1da177e4c Linux-2.6.12-rc2 |
2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 |
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... |
2486 2487 2488 2489 |
if (size) *size = nextval - mod->symtab[best].st_value; if (offset) *offset = addr - mod->symtab[best].st_value; |
1da177e4c Linux-2.6.12-rc2 |
2490 2491 |
return mod->strtab + mod->symtab[best].st_name; } |
6dd06c9fb module: make modu... |
2492 2493 |
/* 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... |
2494 |
const char *module_address_lookup(unsigned long addr, |
6dd06c9fb module: make modu... |
2495 2496 2497 2498 |
unsigned long *size, unsigned long *offset, char **modname, char *namebuf) |
1da177e4c Linux-2.6.12-rc2 |
2499 2500 |
{ struct module *mod; |
cb2a52052 modules: de-mutex... |
2501 |
const char *ret = NULL; |
1da177e4c Linux-2.6.12-rc2 |
2502 |
|
cb2a52052 modules: de-mutex... |
2503 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
2504 |
list_for_each_entry_rcu(mod, &modules, list) { |
a06f6211e module: add withi... |
2505 2506 |
if (within_module_init(addr, mod) || within_module_core(addr, mod)) { |
ffc508919 [PATCH] Create ka... |
2507 2508 |
if (modname) *modname = mod->name; |
cb2a52052 modules: de-mutex... |
2509 2510 |
ret = get_ksymbol(mod, addr, size, offset); break; |
1da177e4c Linux-2.6.12-rc2 |
2511 2512 |
} } |
6dd06c9fb module: make modu... |
2513 2514 2515 2516 2517 |
/* Make a copy in here where it's safe */ if (ret) { strncpy(namebuf, ret, KSYM_NAME_LEN - 1); ret = namebuf; } |
cb2a52052 modules: de-mutex... |
2518 |
preempt_enable(); |
92dfc9dc7 fix "modules: mak... |
2519 |
return ret; |
1da177e4c Linux-2.6.12-rc2 |
2520 |
} |
9d65cb4a1 Fix race between ... |
2521 2522 2523 |
int lookup_module_symbol_name(unsigned long addr, char *symname) { struct module *mod; |
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)) { |
9d65cb4a1 Fix race between ... |
2528 2529 2530 2531 2532 |
const char *sym; sym = get_ksymbol(mod, addr, NULL, NULL); if (!sym) goto out; |
9281acea6 kallsyms: make KS... |
2533 |
strlcpy(symname, sym, KSYM_NAME_LEN); |
cb2a52052 modules: de-mutex... |
2534 |
preempt_enable(); |
9d65cb4a1 Fix race between ... |
2535 2536 2537 2538 |
return 0; } } out: |
cb2a52052 modules: de-mutex... |
2539 |
preempt_enable(); |
9d65cb4a1 Fix race between ... |
2540 2541 |
return -ERANGE; } |
a5c43dae7 Fix race between ... |
2542 2543 2544 2545 |
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... |
2546 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
2547 |
list_for_each_entry_rcu(mod, &modules, list) { |
a06f6211e module: add withi... |
2548 2549 |
if (within_module_init(addr, mod) || within_module_core(addr, mod)) { |
a5c43dae7 Fix race between ... |
2550 2551 2552 2553 2554 2555 |
const char *sym; sym = get_ksymbol(mod, addr, size, offset); if (!sym) goto out; if (modname) |
9281acea6 kallsyms: make KS... |
2556 |
strlcpy(modname, mod->name, MODULE_NAME_LEN); |
a5c43dae7 Fix race between ... |
2557 |
if (name) |
9281acea6 kallsyms: make KS... |
2558 |
strlcpy(name, sym, KSYM_NAME_LEN); |
cb2a52052 modules: de-mutex... |
2559 |
preempt_enable(); |
a5c43dae7 Fix race between ... |
2560 2561 2562 2563 |
return 0; } } out: |
cb2a52052 modules: de-mutex... |
2564 |
preempt_enable(); |
a5c43dae7 Fix race between ... |
2565 2566 |
return -ERANGE; } |
ea07890a6 Fix race between ... |
2567 2568 |
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 |
2569 2570 |
{ struct module *mod; |
cb2a52052 modules: de-mutex... |
2571 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
2572 |
list_for_each_entry_rcu(mod, &modules, list) { |
1da177e4c Linux-2.6.12-rc2 |
2573 2574 2575 |
if (symnum < mod->num_symtab) { *value = mod->symtab[symnum].st_value; *type = mod->symtab[symnum].st_info; |
098c5eea0 [PATCH] null-term... |
2576 |
strlcpy(name, mod->strtab + mod->symtab[symnum].st_name, |
9281acea6 kallsyms: make KS... |
2577 2578 |
KSYM_NAME_LEN); strlcpy(module_name, mod->name, MODULE_NAME_LEN); |
ca4787b77 kernel/module.c: ... |
2579 |
*exported = is_exported(name, *value, mod); |
cb2a52052 modules: de-mutex... |
2580 |
preempt_enable(); |
ea07890a6 Fix race between ... |
2581 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
2582 2583 2584 |
} symnum -= mod->num_symtab; } |
cb2a52052 modules: de-mutex... |
2585 |
preempt_enable(); |
ea07890a6 Fix race between ... |
2586 |
return -ERANGE; |
1da177e4c Linux-2.6.12-rc2 |
2587 2588 2589 2590 2591 2592 2593 |
} 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... |
2594 2595 |
if (strcmp(name, mod->strtab+mod->symtab[i].st_name) == 0 && mod->symtab[i].st_info != 'U') |
1da177e4c Linux-2.6.12-rc2 |
2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 |
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... |
2608 |
preempt_disable(); |
1da177e4c Linux-2.6.12-rc2 |
2609 2610 2611 2612 2613 2614 |
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... |
2615 |
list_for_each_entry_rcu(mod, &modules, list) |
1da177e4c Linux-2.6.12-rc2 |
2616 2617 2618 |
if ((ret = mod_find_symname(mod, name)) != 0) break; } |
cb2a52052 modules: de-mutex... |
2619 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
2620 2621 |
return ret; } |
75a66614d Ksplice: Add func... |
2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 |
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 |
2641 |
#endif /* CONFIG_KALLSYMS */ |
21aa9280b debug: show being... |
2642 |
static char *module_flags(struct module *mod, char *buf) |
fa3ba2e81 [PATCH] fix Modul... |
2643 2644 |
{ int bx = 0; |
21aa9280b debug: show being... |
2645 2646 2647 |
if (mod->taints || mod->state == MODULE_STATE_GOING || mod->state == MODULE_STATE_COMING) { |
fa3ba2e81 [PATCH] fix Modul... |
2648 |
buf[bx++] = '('; |
25ddbb18a Make the taint fl... |
2649 |
if (mod->taints & (1 << TAINT_PROPRIETARY_MODULE)) |
fa3ba2e81 [PATCH] fix Modul... |
2650 |
buf[bx++] = 'P'; |
25ddbb18a Make the taint fl... |
2651 |
if (mod->taints & (1 << TAINT_FORCED_MODULE)) |
fa3ba2e81 [PATCH] fix Modul... |
2652 |
buf[bx++] = 'F'; |
26e9a3977 Merge git://git.k... |
2653 |
if (mod->taints & (1 << TAINT_CRAP)) |
061b1bd39 Staging: add TAIN... |
2654 |
buf[bx++] = 'C'; |
fa3ba2e81 [PATCH] fix Modul... |
2655 2656 2657 2658 2659 |
/* * TAINT_FORCED_RMMOD: could be added. * TAINT_UNSAFE_SMP, TAINT_MACHINE_CHECK, TAINT_BAD_PAGE don't * apply to modules. */ |
21aa9280b debug: show being... |
2660 2661 2662 2663 2664 2665 2666 |
/* 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... |
2667 2668 2669 2670 2671 2672 |
buf[bx++] = ')'; } buf[bx] = '\0'; return buf; } |
3b5d5c6b0 proc: move /proc/... |
2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 |
#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 |
2690 2691 2692 |
static int m_show(struct seq_file *m, void *p) { struct module *mod = list_entry(p, struct module, list); |
fa3ba2e81 [PATCH] fix Modul... |
2693 |
char buf[8]; |
2f0f2a334 module: turn long... |
2694 |
seq_printf(m, "%s %u", |
1da177e4c Linux-2.6.12-rc2 |
2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 |
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... |
2705 2706 |
/* Taints info */ if (mod->taints) |
21aa9280b debug: show being... |
2707 |
seq_printf(m, " %s", module_flags(mod, buf)); |
fa3ba2e81 [PATCH] fix Modul... |
2708 |
|
1da177e4c Linux-2.6.12-rc2 |
2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 |
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/... |
2719 |
static const struct seq_operations modules_op = { |
1da177e4c Linux-2.6.12-rc2 |
2720 2721 2722 2723 2724 |
.start = m_start, .next = m_next, .stop = m_stop, .show = m_show }; |
3b5d5c6b0 proc: move /proc/... |
2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 |
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 |
2744 2745 2746 |
/* 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 |
2747 2748 |
const struct exception_table_entry *e = NULL; struct module *mod; |
24da1cbff modules: remove m... |
2749 |
preempt_disable(); |
d72b37513 Remove stop_machi... |
2750 |
list_for_each_entry_rcu(mod, &modules, list) { |
1da177e4c Linux-2.6.12-rc2 |
2751 2752 |
if (mod->num_exentries == 0) continue; |
22a8bdeb5 whitespace fixes:... |
2753 |
|
1da177e4c Linux-2.6.12-rc2 |
2754 2755 2756 2757 2758 2759 |
e = search_extable(mod->extable, mod->extable + mod->num_exentries - 1, addr); if (e) break; } |
24da1cbff modules: remove m... |
2760 |
preempt_enable(); |
1da177e4c Linux-2.6.12-rc2 |
2761 2762 |
/* Now, if we found one, we are running inside it now, hence |
22a8bdeb5 whitespace fixes:... |
2763 |
we cannot unload the module, hence no refcnt needed. */ |
1da177e4c Linux-2.6.12-rc2 |
2764 2765 |
return e; } |
4d435f9d8 [PATCH] lockdep: ... |
2766 |
/* |
e610499e2 module: __module_... |
2767 2768 2769 2770 2771 |
* 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: ... |
2772 |
*/ |
e610499e2 module: __module_... |
2773 |
bool is_module_address(unsigned long addr) |
4d435f9d8 [PATCH] lockdep: ... |
2774 |
{ |
e610499e2 module: __module_... |
2775 |
bool ret; |
4d435f9d8 [PATCH] lockdep: ... |
2776 |
|
24da1cbff modules: remove m... |
2777 |
preempt_disable(); |
e610499e2 module: __module_... |
2778 |
ret = __module_address(addr) != NULL; |
24da1cbff modules: remove m... |
2779 |
preempt_enable(); |
4d435f9d8 [PATCH] lockdep: ... |
2780 |
|
e610499e2 module: __module_... |
2781 |
return ret; |
4d435f9d8 [PATCH] lockdep: ... |
2782 |
} |
e610499e2 module: __module_... |
2783 2784 2785 2786 2787 2788 2789 |
/* * __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... |
2790 |
struct module *__module_address(unsigned long addr) |
1da177e4c Linux-2.6.12-rc2 |
2791 2792 |
{ struct module *mod; |
3a642e99b modules: Take a s... |
2793 2794 |
if (addr < module_addr_min || addr > module_addr_max) return NULL; |
d72b37513 Remove stop_machi... |
2795 |
list_for_each_entry_rcu(mod, &modules, list) |
e610499e2 module: __module_... |
2796 2797 |
if (within_module_core(addr, mod) || within_module_init(addr, mod)) |
1da177e4c Linux-2.6.12-rc2 |
2798 2799 2800 |
return mod; return NULL; } |
c6b378019 module: Export sy... |
2801 |
EXPORT_SYMBOL_GPL(__module_address); |
1da177e4c Linux-2.6.12-rc2 |
2802 |
|
e610499e2 module: __module_... |
2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 |
/* * 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... |
2840 |
EXPORT_SYMBOL_GPL(__module_text_address); |
e610499e2 module: __module_... |
2841 |
|
1da177e4c Linux-2.6.12-rc2 |
2842 2843 2844 2845 |
/* Don't grab lock, we're oopsing. */ void print_modules(void) { struct module *mod; |
2bc2d61a9 [PATCH] list modu... |
2846 |
char buf[8]; |
1da177e4c Linux-2.6.12-rc2 |
2847 |
|
b231125af printk: add KERN_... |
2848 |
printk(KERN_DEFAULT "Modules linked in:"); |
d72b37513 Remove stop_machi... |
2849 2850 2851 |
/* Most callers should already have preempt disabled, but make sure */ preempt_disable(); list_for_each_entry_rcu(mod, &modules, list) |
21aa9280b debug: show being... |
2852 |
printk(" %s%s", mod->name, module_flags(mod, buf)); |
d72b37513 Remove stop_machi... |
2853 |
preempt_enable(); |
e14af7eeb debug: track and ... |
2854 2855 |
if (last_unloaded_module[0]) printk(" [last unloaded: %s]", last_unloaded_module); |
1da177e4c Linux-2.6.12-rc2 |
2856 2857 2858 |
printk(" "); } |
1da177e4c Linux-2.6.12-rc2 |
2859 |
#ifdef CONFIG_MODVERSIONS |
8c8ef42ae module: include o... |
2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 |
/* 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, struct marker *marker, struct tracepoint *tp) { } EXPORT_SYMBOL(module_layout); |
1da177e4c Linux-2.6.12-rc2 |
2871 |
#endif |
8256e47cd Linux Kernel Markers |
2872 2873 |
#ifdef CONFIG_MARKERS |
fb40bd78b Linux Kernel Mark... |
2874 |
void module_update_markers(void) |
8256e47cd Linux Kernel Markers |
2875 2876 2877 2878 2879 2880 2881 |
{ struct module *mod; mutex_lock(&module_mutex); list_for_each_entry(mod, &modules, list) if (!mod->taints) marker_update_probe_range(mod->markers, |
fb40bd78b Linux Kernel Mark... |
2882 |
mod->markers + mod->num_markers); |
8256e47cd Linux Kernel Markers |
2883 2884 2885 |
mutex_unlock(&module_mutex); } #endif |
97e1c18e8 tracing: Kernel T... |
2886 2887 2888 2889 2890 2891 2892 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 |
#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 |