Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * a.out loader for x86-64 | |
3 | * | |
4 | * Copyright (C) 1991, 1992, 1996 Linus Torvalds | |
5 | * Hacked together by Andi Kleen | |
6 | */ | |
7 | ||
8 | #include <linux/module.h> | |
9 | ||
10 | #include <linux/time.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/mm.h> | |
13 | #include <linux/mman.h> | |
14 | #include <linux/a.out.h> | |
15 | #include <linux/errno.h> | |
16 | #include <linux/signal.h> | |
17 | #include <linux/string.h> | |
18 | #include <linux/fs.h> | |
19 | #include <linux/file.h> | |
20 | #include <linux/stat.h> | |
21 | #include <linux/fcntl.h> | |
22 | #include <linux/ptrace.h> | |
23 | #include <linux/user.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/binfmts.h> | |
26 | #include <linux/personality.h> | |
27 | #include <linux/init.h> | |
28 | ||
29 | #include <asm/system.h> | |
30 | #include <asm/uaccess.h> | |
31 | #include <asm/pgalloc.h> | |
32 | #include <asm/cacheflush.h> | |
33 | #include <asm/user32.h> | |
34 | #include <asm/ia32.h> | |
35 | ||
36 | #undef WARN_OLD | |
37 | #undef CORE_DUMP /* probably broken */ | |
38 | ||
1da177e4 LT |
39 | static int load_aout_binary(struct linux_binprm *, struct pt_regs * regs); |
40 | static int load_aout_library(struct file*); | |
41 | ||
44456d37 | 42 | #ifdef CORE_DUMP |
7dc0b22e | 43 | static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file, unsigned long limit); |
1da177e4 LT |
44 | |
45 | /* | |
46 | * fill in the user structure for a core dump.. | |
47 | */ | |
48 | static void dump_thread32(struct pt_regs * regs, struct user32 * dump) | |
49 | { | |
50 | u32 fs,gs; | |
51 | ||
52 | /* changed the size calculations - should hopefully work better. lbt */ | |
53 | dump->magic = CMAGIC; | |
54 | dump->start_code = 0; | |
55 | dump->start_stack = regs->rsp & ~(PAGE_SIZE - 1); | |
56 | dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT; | |
57 | dump->u_dsize = ((unsigned long) (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT; | |
58 | dump->u_dsize -= dump->u_tsize; | |
59 | dump->u_ssize = 0; | |
60 | dump->u_debugreg[0] = current->thread.debugreg0; | |
61 | dump->u_debugreg[1] = current->thread.debugreg1; | |
62 | dump->u_debugreg[2] = current->thread.debugreg2; | |
63 | dump->u_debugreg[3] = current->thread.debugreg3; | |
64 | dump->u_debugreg[4] = 0; | |
65 | dump->u_debugreg[5] = 0; | |
66 | dump->u_debugreg[6] = current->thread.debugreg6; | |
67 | dump->u_debugreg[7] = current->thread.debugreg7; | |
68 | ||
69 | if (dump->start_stack < 0xc0000000) | |
70 | dump->u_ssize = ((unsigned long) (0xc0000000 - dump->start_stack)) >> PAGE_SHIFT; | |
71 | ||
72 | dump->regs.ebx = regs->rbx; | |
73 | dump->regs.ecx = regs->rcx; | |
74 | dump->regs.edx = regs->rdx; | |
75 | dump->regs.esi = regs->rsi; | |
76 | dump->regs.edi = regs->rdi; | |
77 | dump->regs.ebp = regs->rbp; | |
78 | dump->regs.eax = regs->rax; | |
79 | dump->regs.ds = current->thread.ds; | |
80 | dump->regs.es = current->thread.es; | |
81 | asm("movl %%fs,%0" : "=r" (fs)); dump->regs.fs = fs; | |
82 | asm("movl %%gs,%0" : "=r" (gs)); dump->regs.gs = gs; | |
83 | dump->regs.orig_eax = regs->orig_rax; | |
84 | dump->regs.eip = regs->rip; | |
85 | dump->regs.cs = regs->cs; | |
86 | dump->regs.eflags = regs->eflags; | |
87 | dump->regs.esp = regs->rsp; | |
88 | dump->regs.ss = regs->ss; | |
89 | ||
90 | #if 1 /* FIXME */ | |
91 | dump->u_fpvalid = 0; | |
92 | #else | |
93 | dump->u_fpvalid = dump_fpu (regs, &dump->i387); | |
94 | #endif | |
95 | } | |
96 | ||
97 | #endif | |
98 | ||
99 | static struct linux_binfmt aout_format = { | |
100 | .module = THIS_MODULE, | |
101 | .load_binary = load_aout_binary, | |
102 | .load_shlib = load_aout_library, | |
44456d37 | 103 | #ifdef CORE_DUMP |
1da177e4 LT |
104 | .core_dump = aout_core_dump, |
105 | #endif | |
106 | .min_coredump = PAGE_SIZE | |
107 | }; | |
108 | ||
109 | static void set_brk(unsigned long start, unsigned long end) | |
110 | { | |
111 | start = PAGE_ALIGN(start); | |
112 | end = PAGE_ALIGN(end); | |
113 | if (end <= start) | |
114 | return; | |
115 | down_write(¤t->mm->mmap_sem); | |
116 | do_brk(start, end - start); | |
117 | up_write(¤t->mm->mmap_sem); | |
118 | } | |
119 | ||
44456d37 | 120 | #ifdef CORE_DUMP |
1da177e4 LT |
121 | /* |
122 | * These are the only things you should do on a core-file: use only these | |
123 | * macros to write out all the necessary info. | |
124 | */ | |
125 | ||
126 | static int dump_write(struct file *file, const void *addr, int nr) | |
127 | { | |
128 | return file->f_op->write(file, addr, nr, &file->f_pos) == nr; | |
129 | } | |
130 | ||
131 | #define DUMP_WRITE(addr, nr) \ | |
132 | if (!dump_write(file, (void *)(addr), (nr))) \ | |
133 | goto end_coredump; | |
134 | ||
135 | #define DUMP_SEEK(offset) \ | |
136 | if (file->f_op->llseek) { \ | |
137 | if (file->f_op->llseek(file,(offset),0) != (offset)) \ | |
138 | goto end_coredump; \ | |
139 | } else file->f_pos = (offset) | |
140 | ||
141 | /* | |
142 | * Routine writes a core dump image in the current directory. | |
143 | * Currently only a stub-function. | |
144 | * | |
145 | * Note that setuid/setgid files won't make a core-dump if the uid/gid | |
146 | * changed due to the set[u|g]id. It's enforced by the "current->mm->dumpable" | |
147 | * field, which also makes sure the core-dumps won't be recursive if the | |
148 | * dumping of the process results in another error.. | |
149 | */ | |
150 | ||
7dc0b22e | 151 | static int aout_core_dump(long signr, struct pt_regs *regs, struct file *file, unsigned long limit) |
1da177e4 LT |
152 | { |
153 | mm_segment_t fs; | |
154 | int has_dumped = 0; | |
155 | unsigned long dump_start, dump_size; | |
156 | struct user32 dump; | |
157 | # define START_DATA(u) (u.u_tsize << PAGE_SHIFT) | |
158 | # define START_STACK(u) (u.start_stack) | |
159 | ||
160 | fs = get_fs(); | |
161 | set_fs(KERNEL_DS); | |
162 | has_dumped = 1; | |
163 | current->flags |= PF_DUMPCORE; | |
164 | strncpy(dump.u_comm, current->comm, sizeof(current->comm)); | |
165 | dump.u_ar0 = (u32)(((unsigned long)(&dump.regs)) - ((unsigned long)(&dump))); | |
166 | dump.signal = signr; | |
167 | dump_thread32(regs, &dump); | |
168 | ||
169 | /* If the size of the dump file exceeds the rlimit, then see what would happen | |
170 | if we wrote the stack, but not the data area. */ | |
7dc0b22e | 171 | if ((dump.u_dsize + dump.u_ssize + 1) * PAGE_SIZE > limit) |
1da177e4 LT |
172 | dump.u_dsize = 0; |
173 | ||
174 | /* Make sure we have enough room to write the stack and data areas. */ | |
7dc0b22e | 175 | if ((dump.u_ssize + 1) * PAGE_SIZE > limit) |
1da177e4 LT |
176 | dump.u_ssize = 0; |
177 | ||
178 | /* make sure we actually have a data and stack area to dump */ | |
179 | set_fs(USER_DS); | |
180 | if (!access_ok(VERIFY_READ, (void *) (unsigned long)START_DATA(dump), dump.u_dsize << PAGE_SHIFT)) | |
181 | dump.u_dsize = 0; | |
182 | if (!access_ok(VERIFY_READ, (void *) (unsigned long)START_STACK(dump), dump.u_ssize << PAGE_SHIFT)) | |
183 | dump.u_ssize = 0; | |
184 | ||
185 | set_fs(KERNEL_DS); | |
186 | /* struct user */ | |
187 | DUMP_WRITE(&dump,sizeof(dump)); | |
188 | /* Now dump all of the user data. Include malloced stuff as well */ | |
189 | DUMP_SEEK(PAGE_SIZE); | |
190 | /* now we start writing out the user space info */ | |
191 | set_fs(USER_DS); | |
192 | /* Dump the data area */ | |
193 | if (dump.u_dsize != 0) { | |
194 | dump_start = START_DATA(dump); | |
195 | dump_size = dump.u_dsize << PAGE_SHIFT; | |
196 | DUMP_WRITE(dump_start,dump_size); | |
197 | } | |
198 | /* Now prepare to dump the stack area */ | |
199 | if (dump.u_ssize != 0) { | |
200 | dump_start = START_STACK(dump); | |
201 | dump_size = dump.u_ssize << PAGE_SHIFT; | |
202 | DUMP_WRITE(dump_start,dump_size); | |
203 | } | |
204 | /* Finally dump the task struct. Not be used by gdb, but could be useful */ | |
205 | set_fs(KERNEL_DS); | |
206 | DUMP_WRITE(current,sizeof(*current)); | |
207 | end_coredump: | |
208 | set_fs(fs); | |
209 | return has_dumped; | |
210 | } | |
211 | #endif | |
212 | ||
213 | /* | |
214 | * create_aout_tables() parses the env- and arg-strings in new user | |
215 | * memory and creates the pointer tables from them, and puts their | |
216 | * addresses on the "stack", returning the new stack pointer value. | |
217 | */ | |
218 | static u32 __user *create_aout_tables(char __user *p, struct linux_binprm *bprm) | |
219 | { | |
220 | u32 __user *argv; | |
221 | u32 __user *envp; | |
222 | u32 __user *sp; | |
223 | int argc = bprm->argc; | |
224 | int envc = bprm->envc; | |
225 | ||
226 | sp = (u32 __user *) ((-(unsigned long)sizeof(u32)) & (unsigned long) p); | |
227 | sp -= envc+1; | |
228 | envp = sp; | |
229 | sp -= argc+1; | |
230 | argv = sp; | |
231 | put_user((unsigned long) envp,--sp); | |
232 | put_user((unsigned long) argv,--sp); | |
233 | put_user(argc,--sp); | |
234 | current->mm->arg_start = (unsigned long) p; | |
235 | while (argc-->0) { | |
236 | char c; | |
237 | put_user((u32)(unsigned long)p,argv++); | |
238 | do { | |
239 | get_user(c,p++); | |
240 | } while (c); | |
241 | } | |
74019699 | 242 | put_user(0, argv); |
1da177e4 LT |
243 | current->mm->arg_end = current->mm->env_start = (unsigned long) p; |
244 | while (envc-->0) { | |
245 | char c; | |
246 | put_user((u32)(unsigned long)p,envp++); | |
247 | do { | |
248 | get_user(c,p++); | |
249 | } while (c); | |
250 | } | |
74019699 | 251 | put_user(0, envp); |
1da177e4 LT |
252 | current->mm->env_end = (unsigned long) p; |
253 | return sp; | |
254 | } | |
255 | ||
256 | /* | |
257 | * These are the functions used to load a.out style executables and shared | |
258 | * libraries. There is no binary dependent code anywhere else. | |
259 | */ | |
260 | ||
261 | static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs) | |
262 | { | |
263 | struct exec ex; | |
264 | unsigned long error; | |
265 | unsigned long fd_offset; | |
266 | unsigned long rlim; | |
267 | int retval; | |
268 | ||
269 | ex = *((struct exec *) bprm->buf); /* exec-header */ | |
270 | if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != OMAGIC && | |
271 | N_MAGIC(ex) != QMAGIC && N_MAGIC(ex) != NMAGIC) || | |
272 | N_TRSIZE(ex) || N_DRSIZE(ex) || | |
c941192a | 273 | i_size_read(bprm->file->f_path.dentry->d_inode) < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) { |
1da177e4 LT |
274 | return -ENOEXEC; |
275 | } | |
276 | ||
277 | fd_offset = N_TXTOFF(ex); | |
278 | ||
279 | /* Check initial limits. This avoids letting people circumvent | |
280 | * size limits imposed on them by creating programs with large | |
281 | * arrays in the data or bss. | |
282 | */ | |
283 | rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur; | |
284 | if (rlim >= RLIM_INFINITY) | |
285 | rlim = ~0; | |
286 | if (ex.a_data + ex.a_bss > rlim) | |
287 | return -ENOMEM; | |
288 | ||
289 | /* Flush all traces of the currently running executable */ | |
290 | retval = flush_old_exec(bprm); | |
291 | if (retval) | |
292 | return retval; | |
293 | ||
294 | regs->cs = __USER32_CS; | |
295 | regs->r8 = regs->r9 = regs->r10 = regs->r11 = regs->r12 = | |
296 | regs->r13 = regs->r14 = regs->r15 = 0; | |
297 | ||
298 | /* OK, This is the point of no return */ | |
299 | set_personality(PER_LINUX); | |
300 | set_thread_flag(TIF_IA32); | |
301 | clear_thread_flag(TIF_ABI_PENDING); | |
302 | ||
303 | current->mm->end_code = ex.a_text + | |
304 | (current->mm->start_code = N_TXTADDR(ex)); | |
305 | current->mm->end_data = ex.a_data + | |
306 | (current->mm->start_data = N_DATADDR(ex)); | |
307 | current->mm->brk = ex.a_bss + | |
308 | (current->mm->start_brk = N_BSSADDR(ex)); | |
309 | current->mm->free_area_cache = TASK_UNMAPPED_BASE; | |
1363c3cd | 310 | current->mm->cached_hole_size = 0; |
1da177e4 | 311 | |
1da177e4 LT |
312 | current->mm->mmap = NULL; |
313 | compute_creds(bprm); | |
314 | current->flags &= ~PF_FORKNOEXEC; | |
315 | ||
316 | if (N_MAGIC(ex) == OMAGIC) { | |
317 | unsigned long text_addr, map_size; | |
318 | loff_t pos; | |
319 | ||
320 | text_addr = N_TXTADDR(ex); | |
321 | ||
322 | pos = 32; | |
323 | map_size = ex.a_text+ex.a_data; | |
324 | ||
325 | down_write(¤t->mm->mmap_sem); | |
326 | error = do_brk(text_addr & PAGE_MASK, map_size); | |
327 | up_write(¤t->mm->mmap_sem); | |
328 | ||
329 | if (error != (text_addr & PAGE_MASK)) { | |
330 | send_sig(SIGKILL, current, 0); | |
331 | return error; | |
332 | } | |
333 | ||
52d522f5 AK |
334 | error = bprm->file->f_op->read(bprm->file, |
335 | (char __user *)text_addr, | |
1da177e4 LT |
336 | ex.a_text+ex.a_data, &pos); |
337 | if ((signed long)error < 0) { | |
338 | send_sig(SIGKILL, current, 0); | |
339 | return error; | |
340 | } | |
341 | ||
342 | flush_icache_range(text_addr, text_addr+ex.a_text+ex.a_data); | |
343 | } else { | |
344 | #ifdef WARN_OLD | |
345 | static unsigned long error_time, error_time2; | |
346 | if ((ex.a_text & 0xfff || ex.a_data & 0xfff) && | |
347 | (N_MAGIC(ex) != NMAGIC) && (jiffies-error_time2) > 5*HZ) | |
348 | { | |
349 | printk(KERN_NOTICE "executable not page aligned\n"); | |
350 | error_time2 = jiffies; | |
351 | } | |
352 | ||
353 | if ((fd_offset & ~PAGE_MASK) != 0 && | |
354 | (jiffies-error_time) > 5*HZ) | |
355 | { | |
356 | printk(KERN_WARNING | |
357 | "fd_offset is not page aligned. Please convert program: %s\n", | |
c941192a | 358 | bprm->file->f_path.dentry->d_name.name); |
1da177e4 LT |
359 | error_time = jiffies; |
360 | } | |
361 | #endif | |
362 | ||
363 | if (!bprm->file->f_op->mmap||((fd_offset & ~PAGE_MASK) != 0)) { | |
364 | loff_t pos = fd_offset; | |
365 | down_write(¤t->mm->mmap_sem); | |
366 | do_brk(N_TXTADDR(ex), ex.a_text+ex.a_data); | |
367 | up_write(¤t->mm->mmap_sem); | |
52d522f5 AK |
368 | bprm->file->f_op->read(bprm->file, |
369 | (char __user *)N_TXTADDR(ex), | |
1da177e4 LT |
370 | ex.a_text+ex.a_data, &pos); |
371 | flush_icache_range((unsigned long) N_TXTADDR(ex), | |
372 | (unsigned long) N_TXTADDR(ex) + | |
373 | ex.a_text+ex.a_data); | |
374 | goto beyond_if; | |
375 | } | |
376 | ||
377 | down_write(¤t->mm->mmap_sem); | |
378 | error = do_mmap(bprm->file, N_TXTADDR(ex), ex.a_text, | |
379 | PROT_READ | PROT_EXEC, | |
380 | MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE | MAP_32BIT, | |
381 | fd_offset); | |
382 | up_write(¤t->mm->mmap_sem); | |
383 | ||
384 | if (error != N_TXTADDR(ex)) { | |
385 | send_sig(SIGKILL, current, 0); | |
386 | return error; | |
387 | } | |
388 | ||
389 | down_write(¤t->mm->mmap_sem); | |
390 | error = do_mmap(bprm->file, N_DATADDR(ex), ex.a_data, | |
391 | PROT_READ | PROT_WRITE | PROT_EXEC, | |
392 | MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE | MAP_32BIT, | |
393 | fd_offset + ex.a_text); | |
394 | up_write(¤t->mm->mmap_sem); | |
395 | if (error != N_DATADDR(ex)) { | |
396 | send_sig(SIGKILL, current, 0); | |
397 | return error; | |
398 | } | |
399 | } | |
400 | beyond_if: | |
401 | set_binfmt(&aout_format); | |
402 | ||
403 | set_brk(current->mm->start_brk, current->mm->brk); | |
404 | ||
b6a2fea3 | 405 | retval = setup_arg_pages(bprm, IA32_STACK_TOP, EXSTACK_DEFAULT); |
1da177e4 LT |
406 | if (retval < 0) { |
407 | /* Someone check-me: is this error path enough? */ | |
408 | send_sig(SIGKILL, current, 0); | |
409 | return retval; | |
410 | } | |
411 | ||
412 | current->mm->start_stack = | |
413 | (unsigned long)create_aout_tables((char __user *)bprm->p, bprm); | |
414 | /* start thread */ | |
415 | asm volatile("movl %0,%%fs" :: "r" (0)); \ | |
416 | asm volatile("movl %0,%%es; movl %0,%%ds": :"r" (__USER32_DS)); | |
417 | load_gs_index(0); | |
418 | (regs)->rip = ex.a_entry; | |
419 | (regs)->rsp = current->mm->start_stack; | |
420 | (regs)->eflags = 0x200; | |
421 | (regs)->cs = __USER32_CS; | |
422 | (regs)->ss = __USER32_DS; | |
423 | set_fs(USER_DS); | |
424 | if (unlikely(current->ptrace & PT_PTRACED)) { | |
425 | if (current->ptrace & PT_TRACE_EXEC) | |
426 | ptrace_notify ((PTRACE_EVENT_EXEC << 8) | SIGTRAP); | |
427 | else | |
428 | send_sig(SIGTRAP, current, 0); | |
429 | } | |
430 | return 0; | |
431 | } | |
432 | ||
433 | static int load_aout_library(struct file *file) | |
434 | { | |
435 | struct inode * inode; | |
436 | unsigned long bss, start_addr, len; | |
437 | unsigned long error; | |
438 | int retval; | |
439 | struct exec ex; | |
440 | ||
c941192a | 441 | inode = file->f_path.dentry->d_inode; |
1da177e4 LT |
442 | |
443 | retval = -ENOEXEC; | |
444 | error = kernel_read(file, 0, (char *) &ex, sizeof(ex)); | |
445 | if (error != sizeof(ex)) | |
446 | goto out; | |
447 | ||
448 | /* We come in here for the regular a.out style of shared libraries */ | |
449 | if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != QMAGIC) || N_TRSIZE(ex) || | |
450 | N_DRSIZE(ex) || ((ex.a_entry & 0xfff) && N_MAGIC(ex) == ZMAGIC) || | |
451 | i_size_read(inode) < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) { | |
452 | goto out; | |
453 | } | |
454 | ||
455 | if (N_FLAGS(ex)) | |
456 | goto out; | |
457 | ||
458 | /* For QMAGIC, the starting address is 0x20 into the page. We mask | |
459 | this off to get the starting address for the page */ | |
460 | ||
461 | start_addr = ex.a_entry & 0xfffff000; | |
462 | ||
463 | if ((N_TXTOFF(ex) & ~PAGE_MASK) != 0) { | |
464 | loff_t pos = N_TXTOFF(ex); | |
465 | ||
466 | #ifdef WARN_OLD | |
467 | static unsigned long error_time; | |
468 | if ((jiffies-error_time) > 5*HZ) | |
469 | { | |
470 | printk(KERN_WARNING | |
471 | "N_TXTOFF is not page aligned. Please convert library: %s\n", | |
c941192a | 472 | file->f_path.dentry->d_name.name); |
1da177e4 LT |
473 | error_time = jiffies; |
474 | } | |
475 | #endif | |
476 | down_write(¤t->mm->mmap_sem); | |
477 | do_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss); | |
478 | up_write(¤t->mm->mmap_sem); | |
479 | ||
52d522f5 | 480 | file->f_op->read(file, (char __user *)start_addr, |
1da177e4 LT |
481 | ex.a_text + ex.a_data, &pos); |
482 | flush_icache_range((unsigned long) start_addr, | |
483 | (unsigned long) start_addr + ex.a_text + ex.a_data); | |
484 | ||
485 | retval = 0; | |
486 | goto out; | |
487 | } | |
488 | /* Now use mmap to map the library into memory. */ | |
489 | down_write(¤t->mm->mmap_sem); | |
490 | error = do_mmap(file, start_addr, ex.a_text + ex.a_data, | |
491 | PROT_READ | PROT_WRITE | PROT_EXEC, | |
492 | MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_32BIT, | |
493 | N_TXTOFF(ex)); | |
494 | up_write(¤t->mm->mmap_sem); | |
495 | retval = error; | |
496 | if (error != start_addr) | |
497 | goto out; | |
498 | ||
499 | len = PAGE_ALIGN(ex.a_text + ex.a_data); | |
500 | bss = ex.a_text + ex.a_data + ex.a_bss; | |
501 | if (bss > len) { | |
502 | down_write(¤t->mm->mmap_sem); | |
503 | error = do_brk(start_addr + len, bss - len); | |
504 | up_write(¤t->mm->mmap_sem); | |
505 | retval = error; | |
506 | if (error != start_addr + len) | |
507 | goto out; | |
508 | } | |
509 | retval = 0; | |
510 | out: | |
511 | return retval; | |
512 | } | |
513 | ||
514 | static int __init init_aout_binfmt(void) | |
515 | { | |
516 | return register_binfmt(&aout_format); | |
517 | } | |
518 | ||
519 | static void __exit exit_aout_binfmt(void) | |
520 | { | |
521 | unregister_binfmt(&aout_format); | |
522 | } | |
523 | ||
524 | module_init(init_aout_binfmt); | |
525 | module_exit(exit_aout_binfmt); | |
526 | MODULE_LICENSE("GPL"); |