blob: 2a59139f520b96bcab261f9a7a9fb42e0f38220f [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/fs/binfmt_aout.c
3 *
4 * Copyright (C) 1991, 1992, 1996 Linus Torvalds
5 */
6
7#include <linux/module.h>
8
9#include <linux/time.h>
10#include <linux/kernel.h>
11#include <linux/mm.h>
12#include <linux/mman.h>
13#include <linux/a.out.h>
14#include <linux/errno.h>
15#include <linux/signal.h>
16#include <linux/string.h>
17#include <linux/fs.h>
18#include <linux/file.h>
19#include <linux/stat.h>
20#include <linux/fcntl.h>
21#include <linux/ptrace.h>
22#include <linux/user.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <linux/binfmts.h>
24#include <linux/personality.h>
25#include <linux/init.h>
Daisuke HATAYAMA088e7af2010-03-05 13:44:06 -080026#include <linux/coredump.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090027#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028
Linus Torvalds7c0f6ba2016-12-24 11:46:01 -080029#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <asm/cacheflush.h>
David Howells7fa30312008-02-08 04:19:28 -080031#include <asm/a.out-core.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
Al Viro71613c32012-10-20 22:00:48 -040033static int load_aout_binary(struct linux_binprm *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070034static int load_aout_library(struct file*);
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
Alex Kelly046d6622012-10-04 17:15:23 -070036#ifdef CONFIG_COREDUMP
Linus Torvalds1da177e2005-04-16 15:20:36 -070037/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070038 * Routine writes a core dump image in the current directory.
39 * Currently only a stub-function.
40 *
41 * Note that setuid/setgid files won't make a core-dump if the uid/gid
42 * changed due to the set[u|g]id. It's enforced by the "current->mm->dumpable"
43 * field, which also makes sure the core-dumps won't be recursive if the
44 * dumping of the process results in another error..
45 */
Masami Hiramatsuf6151df2009-12-17 15:27:16 -080046static int aout_core_dump(struct coredump_params *cprm)
Linus Torvalds1da177e2005-04-16 15:20:36 -070047{
48 mm_segment_t fs;
49 int has_dumped = 0;
Borislav Petkov7731d9a2010-03-23 13:35:15 -070050 void __user *dump_start;
51 int dump_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 struct user dump;
Al Viro17580d72009-01-03 07:16:23 +000053#ifdef __alpha__
Borislav Petkov7731d9a2010-03-23 13:35:15 -070054# define START_DATA(u) ((void __user *)u.start_data)
Al Viro17580d72009-01-03 07:16:23 +000055#else
Borislav Petkov7731d9a2010-03-23 13:35:15 -070056# define START_DATA(u) ((void __user *)((u.u_tsize << PAGE_SHIFT) + \
57 u.start_code))
Linus Torvalds1da177e2005-04-16 15:20:36 -070058#endif
Borislav Petkov7731d9a2010-03-23 13:35:15 -070059# define START_STACK(u) ((void __user *)u.start_stack)
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
61 fs = get_fs();
62 set_fs(KERNEL_DS);
63 has_dumped = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 strncpy(dump.u_comm, current->comm, sizeof(dump.u_comm));
H. Peter Anvin6e16d892008-02-07 00:15:57 -080065 dump.u_ar0 = offsetof(struct user, regs);
Denys Vlasenko5ab1c302012-10-04 17:15:29 -070066 dump.signal = cprm->siginfo->si_signo;
Masami Hiramatsuf6151df2009-12-17 15:27:16 -080067 aout_dump_thread(cprm->regs, &dump);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
69/* If the size of the dump file exceeds the rlimit, then see what would happen
70 if we wrote the stack, but not the data area. */
Masami Hiramatsuf6151df2009-12-17 15:27:16 -080071 if ((dump.u_dsize + dump.u_ssize+1) * PAGE_SIZE > cprm->limit)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 dump.u_dsize = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
74/* Make sure we have enough room to write the stack and data areas. */
Masami Hiramatsuf6151df2009-12-17 15:27:16 -080075 if ((dump.u_ssize + 1) * PAGE_SIZE > cprm->limit)
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 dump.u_ssize = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
78/* make sure we actually have a data and stack area to dump */
79 set_fs(USER_DS);
Borislav Petkov7731d9a2010-03-23 13:35:15 -070080 if (!access_ok(VERIFY_READ, START_DATA(dump), dump.u_dsize << PAGE_SHIFT))
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 dump.u_dsize = 0;
Borislav Petkov7731d9a2010-03-23 13:35:15 -070082 if (!access_ok(VERIFY_READ, START_STACK(dump), dump.u_ssize << PAGE_SHIFT))
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 dump.u_ssize = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
85 set_fs(KERNEL_DS);
86/* struct user */
Al Viro43a5d542013-10-07 07:22:01 -040087 if (!dump_emit(cprm, &dump, sizeof(dump)))
Daisuke HATAYAMA088e7af2010-03-05 13:44:06 -080088 goto end_coredump;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089/* Now dump all of the user data. Include malloced stuff as well */
Al Viro9b56d542013-10-08 09:26:08 -040090 if (!dump_skip(cprm, PAGE_SIZE - sizeof(dump)))
Daisuke HATAYAMA05f47fd2010-03-05 13:44:05 -080091 goto end_coredump;
Linus Torvalds1da177e2005-04-16 15:20:36 -070092/* now we start writing out the user space info */
93 set_fs(USER_DS);
94/* Dump the data area */
95 if (dump.u_dsize != 0) {
96 dump_start = START_DATA(dump);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 dump_size = dump.u_dsize << PAGE_SHIFT;
Al Viro43a5d542013-10-07 07:22:01 -040098 if (!dump_emit(cprm, dump_start, dump_size))
Daisuke HATAYAMA088e7af2010-03-05 13:44:06 -080099 goto end_coredump;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 }
101/* Now prepare to dump the stack area */
102 if (dump.u_ssize != 0) {
103 dump_start = START_STACK(dump);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 dump_size = dump.u_ssize << PAGE_SHIFT;
Al Viro43a5d542013-10-07 07:22:01 -0400105 if (!dump_emit(cprm, dump_start, dump_size))
Daisuke HATAYAMA088e7af2010-03-05 13:44:06 -0800106 goto end_coredump;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108end_coredump:
109 set_fs(fs);
110 return has_dumped;
111}
Alex Kelly046d6622012-10-04 17:15:23 -0700112#else
113#define aout_core_dump NULL
114#endif
115
116static struct linux_binfmt aout_format = {
117 .module = THIS_MODULE,
118 .load_binary = load_aout_binary,
119 .load_shlib = load_aout_library,
120 .core_dump = aout_core_dump,
121 .min_coredump = PAGE_SIZE
122};
123
124#define BAD_ADDR(x) ((unsigned long)(x) >= TASK_SIZE)
125
126static int set_brk(unsigned long start, unsigned long end)
127{
128 start = PAGE_ALIGN(start);
129 end = PAGE_ALIGN(end);
Linus Torvalds5d22fc22016-05-27 15:57:31 -0700130 if (end > start)
131 return vm_brk(start, end - start);
Alex Kelly046d6622012-10-04 17:15:23 -0700132 return 0;
133}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135/*
136 * create_aout_tables() parses the env- and arg-strings in new user
137 * memory and creates the pointer tables from them, and puts their
138 * addresses on the "stack", returning the new stack pointer value.
139 */
140static unsigned long __user *create_aout_tables(char __user *p, struct linux_binprm * bprm)
141{
142 char __user * __user *argv;
143 char __user * __user *envp;
144 unsigned long __user *sp;
145 int argc = bprm->argc;
146 int envc = bprm->envc;
147
148 sp = (void __user *)((-(unsigned long)sizeof(char *)) & (unsigned long) p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149#ifdef __alpha__
150/* whee.. test-programs are so much fun. */
151 put_user(0, --sp);
152 put_user(0, --sp);
153 if (bprm->loader) {
154 put_user(0, --sp);
Al Viro17580d72009-01-03 07:16:23 +0000155 put_user(1003, --sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 put_user(bprm->loader, --sp);
Al Viro17580d72009-01-03 07:16:23 +0000157 put_user(1002, --sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 }
159 put_user(bprm->exec, --sp);
Al Viro17580d72009-01-03 07:16:23 +0000160 put_user(1001, --sp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161#endif
162 sp -= envc+1;
163 envp = (char __user * __user *) sp;
164 sp -= argc+1;
165 argv = (char __user * __user *) sp;
Al Viro17580d72009-01-03 07:16:23 +0000166#ifndef __alpha__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 put_user((unsigned long) envp,--sp);
168 put_user((unsigned long) argv,--sp);
169#endif
170 put_user(argc,--sp);
171 current->mm->arg_start = (unsigned long) p;
172 while (argc-->0) {
173 char c;
174 put_user(p,argv++);
175 do {
176 get_user(c,p++);
177 } while (c);
178 }
179 put_user(NULL,argv);
180 current->mm->arg_end = current->mm->env_start = (unsigned long) p;
181 while (envc-->0) {
182 char c;
183 put_user(p,envp++);
184 do {
185 get_user(c,p++);
186 } while (c);
187 }
188 put_user(NULL,envp);
189 current->mm->env_end = (unsigned long) p;
190 return sp;
191}
192
193/*
194 * These are the functions used to load a.out style executables and shared
195 * libraries. There is no binary dependent code anywhere else.
196 */
197
Al Viro71613c32012-10-20 22:00:48 -0400198static int load_aout_binary(struct linux_binprm * bprm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199{
Al Viro71613c32012-10-20 22:00:48 -0400200 struct pt_regs *regs = current_pt_regs();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 struct exec ex;
202 unsigned long error;
203 unsigned long fd_offset;
204 unsigned long rlim;
205 int retval;
206
207 ex = *((struct exec *) bprm->buf); /* exec-header */
208 if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != OMAGIC &&
209 N_MAGIC(ex) != QMAGIC && N_MAGIC(ex) != NMAGIC) ||
210 N_TRSIZE(ex) || N_DRSIZE(ex) ||
Al Viro496ad9a2013-01-23 17:07:38 -0500211 i_size_read(file_inode(bprm->file)) < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 return -ENOEXEC;
213 }
214
Eugene Teo8454aee2006-09-29 01:59:33 -0700215 /*
216 * Requires a mmap handler. This prevents people from using a.out
217 * as part of an exploit attack against /proc-related vulnerabilities.
218 */
Al Viro72c2d532013-09-22 16:27:52 -0400219 if (!bprm->file->f_op->mmap)
Eugene Teo8454aee2006-09-29 01:59:33 -0700220 return -ENOEXEC;
221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 fd_offset = N_TXTOFF(ex);
223
224 /* Check initial limits. This avoids letting people circumvent
225 * size limits imposed on them by creating programs with large
226 * arrays in the data or bss.
227 */
Jiri Slabyd554ed892010-03-05 13:42:42 -0800228 rlim = rlimit(RLIMIT_DATA);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 if (rlim >= RLIM_INFINITY)
230 rlim = ~0;
231 if (ex.a_data + ex.a_bss > rlim)
232 return -ENOMEM;
233
234 /* Flush all traces of the currently running executable */
235 retval = flush_old_exec(bprm);
236 if (retval)
237 return retval;
238
239 /* OK, This is the point of no return */
Al Viro17580d72009-01-03 07:16:23 +0000240#ifdef __alpha__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 SET_AOUT_PERSONALITY(bprm, ex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242#else
243 set_personality(PER_LINUX);
244#endif
Linus Torvalds221af7f2010-01-28 22:14:42 -0800245 setup_new_exec(bprm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
247 current->mm->end_code = ex.a_text +
248 (current->mm->start_code = N_TXTADDR(ex));
249 current->mm->end_data = ex.a_data +
250 (current->mm->start_data = N_DATADDR(ex));
251 current->mm->brk = ex.a_bss +
252 (current->mm->start_brk = N_BSSADDR(ex));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
Al Viro6414fa6a2012-03-05 06:38:42 +0000254 retval = setup_arg_pages(bprm, STACK_TOP, EXSTACK_DEFAULT);
Al Viro19d860a2014-05-04 20:11:36 -0400255 if (retval < 0)
Al Viro6414fa6a2012-03-05 06:38:42 +0000256 return retval;
Al Viro6414fa6a2012-03-05 06:38:42 +0000257
David Howellsa6f76f22008-11-14 10:39:24 +1100258 install_exec_creds(bprm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
260 if (N_MAGIC(ex) == OMAGIC) {
261 unsigned long text_addr, map_size;
262 loff_t pos;
263
264 text_addr = N_TXTADDR(ex);
265
Al Virofe30af92009-01-03 07:16:13 +0000266#ifdef __alpha__
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 pos = fd_offset;
268 map_size = ex.a_text+ex.a_data + PAGE_SIZE - 1;
269#else
270 pos = 32;
271 map_size = ex.a_text+ex.a_data;
272#endif
Linus Torvaldse4eb1ff2012-04-20 15:35:40 -0700273 error = vm_brk(text_addr & PAGE_MASK, map_size);
Linus Torvalds5d22fc22016-05-27 15:57:31 -0700274 if (error)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
Al Viro3dc20cb2013-04-13 20:31:37 -0400277 error = read_code(bprm->file, text_addr, pos,
278 ex.a_text+ex.a_data);
Al Viro19d860a2014-05-04 20:11:36 -0400279 if ((signed long)error < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 if ((ex.a_text & 0xfff || ex.a_data & 0xfff) &&
S.Caglar Onur2e50b6c2008-04-29 00:59:26 -0700283 (N_MAGIC(ex) != NMAGIC) && printk_ratelimit())
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 {
285 printk(KERN_NOTICE "executable not page aligned\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 }
287
S.Caglar Onur2e50b6c2008-04-29 00:59:26 -0700288 if ((fd_offset & ~PAGE_MASK) != 0 && printk_ratelimit())
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 {
290 printk(KERN_WARNING
Al Viroa4555892014-10-21 20:11:25 -0400291 "fd_offset is not page aligned. Please convert program: %pD\n",
292 bprm->file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 }
294
295 if (!bprm->file->f_op->mmap||((fd_offset & ~PAGE_MASK) != 0)) {
Michal Hocko864778b2016-05-23 16:25:36 -0700296 error = vm_brk(N_TXTADDR(ex), ex.a_text+ex.a_data);
Linus Torvalds5d22fc22016-05-27 15:57:31 -0700297 if (error)
Michal Hocko864778b2016-05-23 16:25:36 -0700298 return error;
299
Al Viro3dc20cb2013-04-13 20:31:37 -0400300 read_code(bprm->file, N_TXTADDR(ex), fd_offset,
301 ex.a_text + ex.a_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 goto beyond_if;
303 }
304
Linus Torvalds6be5ceb2012-04-20 17:13:58 -0700305 error = vm_mmap(bprm->file, N_TXTADDR(ex), ex.a_text,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 PROT_READ | PROT_EXEC,
307 MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
308 fd_offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
Al Viro19d860a2014-05-04 20:11:36 -0400310 if (error != N_TXTADDR(ex))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
Linus Torvalds6be5ceb2012-04-20 17:13:58 -0700313 error = vm_mmap(bprm->file, N_DATADDR(ex), ex.a_data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 PROT_READ | PROT_WRITE | PROT_EXEC,
315 MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
316 fd_offset + ex.a_text);
Al Viro19d860a2014-05-04 20:11:36 -0400317 if (error != N_DATADDR(ex))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 }
320beyond_if:
321 set_binfmt(&aout_format);
322
323 retval = set_brk(current->mm->start_brk, current->mm->brk);
Al Viro19d860a2014-05-04 20:11:36 -0400324 if (retval < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 return retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 current->mm->start_stack =
328 (unsigned long) create_aout_tables((char __user *) bprm->p, bprm);
329#ifdef __alpha__
330 regs->gp = ex.a_gpvalue;
331#endif
332 start_thread(regs, ex.a_entry, current->mm->start_stack);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 return 0;
334}
335
336static int load_aout_library(struct file *file)
337{
338 struct inode * inode;
339 unsigned long bss, start_addr, len;
340 unsigned long error;
341 int retval;
342 struct exec ex;
343
Al Viro496ad9a2013-01-23 17:07:38 -0500344 inode = file_inode(file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
346 retval = -ENOEXEC;
347 error = kernel_read(file, 0, (char *) &ex, sizeof(ex));
348 if (error != sizeof(ex))
349 goto out;
350
351 /* We come in here for the regular a.out style of shared libraries */
352 if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != QMAGIC) || N_TRSIZE(ex) ||
353 N_DRSIZE(ex) || ((ex.a_entry & 0xfff) && N_MAGIC(ex) == ZMAGIC) ||
354 i_size_read(inode) < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) {
355 goto out;
356 }
357
Eugene Teo8454aee2006-09-29 01:59:33 -0700358 /*
359 * Requires a mmap handler. This prevents people from using a.out
360 * as part of an exploit attack against /proc-related vulnerabilities.
361 */
Al Viro72c2d532013-09-22 16:27:52 -0400362 if (!file->f_op->mmap)
Eugene Teo8454aee2006-09-29 01:59:33 -0700363 goto out;
364
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 if (N_FLAGS(ex))
366 goto out;
367
368 /* For QMAGIC, the starting address is 0x20 into the page. We mask
369 this off to get the starting address for the page */
370
371 start_addr = ex.a_entry & 0xfffff000;
372
373 if ((N_TXTOFF(ex) & ~PAGE_MASK) != 0) {
S.Caglar Onur2e50b6c2008-04-29 00:59:26 -0700374 if (printk_ratelimit())
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 {
376 printk(KERN_WARNING
Al Viroa4555892014-10-21 20:11:25 -0400377 "N_TXTOFF is not page aligned. Please convert library: %pD\n",
378 file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 }
Michal Hocko864778b2016-05-23 16:25:36 -0700380 retval = vm_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss);
Linus Torvalds5d22fc22016-05-27 15:57:31 -0700381 if (retval)
Michal Hocko864778b2016-05-23 16:25:36 -0700382 goto out;
383
Al Viro3dc20cb2013-04-13 20:31:37 -0400384 read_code(file, start_addr, N_TXTOFF(ex),
385 ex.a_text + ex.a_data);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 retval = 0;
387 goto out;
388 }
389 /* Now use mmap to map the library into memory. */
Linus Torvalds6be5ceb2012-04-20 17:13:58 -0700390 error = vm_mmap(file, start_addr, ex.a_text + ex.a_data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 PROT_READ | PROT_WRITE | PROT_EXEC,
392 MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
393 N_TXTOFF(ex));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 retval = error;
395 if (error != start_addr)
396 goto out;
397
398 len = PAGE_ALIGN(ex.a_text + ex.a_data);
399 bss = ex.a_text + ex.a_data + ex.a_bss;
400 if (bss > len) {
Linus Torvalds5d22fc22016-05-27 15:57:31 -0700401 retval = vm_brk(start_addr + len, bss - len);
402 if (retval)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 goto out;
404 }
405 retval = 0;
406out:
407 return retval;
408}
409
410static int __init init_aout_binfmt(void)
411{
Al Viro8fc3dc52012-03-17 03:05:16 -0400412 register_binfmt(&aout_format);
413 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414}
415
416static void __exit exit_aout_binfmt(void)
417{
418 unregister_binfmt(&aout_format);
419}
420
421core_initcall(init_aout_binfmt);
422module_exit(exit_aout_binfmt);
423MODULE_LICENSE("GPL");