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Commit | Line | Data |
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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> | |
1da177e4 LT |
24 | #include <linux/binfmts.h> |
25 | #include <linux/personality.h> | |
26 | #include <linux/init.h> | |
e5fc3161 | 27 | #include <linux/jiffies.h> |
7d2f551f | 28 | #include <linux/perf_event.h> |
68db0cf1 | 29 | #include <linux/sched/task_stack.h> |
1da177e4 | 30 | |
7c0f6ba6 | 31 | #include <linux/uaccess.h> |
1da177e4 LT |
32 | #include <asm/pgalloc.h> |
33 | #include <asm/cacheflush.h> | |
34 | #include <asm/user32.h> | |
35 | #include <asm/ia32.h> | |
36 | ||
37 | #undef WARN_OLD | |
1da177e4 | 38 | |
71613c3b | 39 | static int load_aout_binary(struct linux_binprm *); |
8edf8bee | 40 | static int load_aout_library(struct file *); |
1da177e4 | 41 | |
7d2f551f AV |
42 | #ifdef CONFIG_COREDUMP |
43 | static int aout_core_dump(struct coredump_params *); | |
44 | ||
45 | static unsigned long get_dr(int n) | |
46 | { | |
47 | struct perf_event *bp = current->thread.ptrace_bps[n]; | |
48 | return bp ? bp->hw.info.address : 0; | |
49 | } | |
1da177e4 LT |
50 | |
51 | /* | |
52 | * fill in the user structure for a core dump.. | |
53 | */ | |
10970e1b | 54 | static void fill_dump(struct pt_regs *regs, struct user32 *dump) |
1da177e4 | 55 | { |
8edf8bee | 56 | u32 fs, gs; |
7d2f551f | 57 | memset(dump, 0, sizeof(*dump)); |
1da177e4 LT |
58 | |
59 | /* changed the size calculations - should hopefully work better. lbt */ | |
60 | dump->magic = CMAGIC; | |
61 | dump->start_code = 0; | |
65ea5b03 | 62 | dump->start_stack = regs->sp & ~(PAGE_SIZE - 1); |
1da177e4 | 63 | dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT; |
8edf8bee TG |
64 | dump->u_dsize = ((unsigned long) |
65 | (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT; | |
1da177e4 | 66 | dump->u_dsize -= dump->u_tsize; |
7d2f551f AV |
67 | dump->u_debugreg[0] = get_dr(0); |
68 | dump->u_debugreg[1] = get_dr(1); | |
69 | dump->u_debugreg[2] = get_dr(2); | |
70 | dump->u_debugreg[3] = get_dr(3); | |
8edf8bee | 71 | dump->u_debugreg[6] = current->thread.debugreg6; |
7d2f551f | 72 | dump->u_debugreg[7] = current->thread.ptrace_dr7; |
8edf8bee TG |
73 | |
74 | if (dump->start_stack < 0xc0000000) { | |
75 | unsigned long tmp; | |
76 | ||
77 | tmp = (unsigned long) (0xc0000000 - dump->start_stack); | |
78 | dump->u_ssize = tmp >> PAGE_SHIFT; | |
79 | } | |
1da177e4 | 80 | |
7d2f551f AV |
81 | dump->regs.ebx = regs->bx; |
82 | dump->regs.ecx = regs->cx; | |
83 | dump->regs.edx = regs->dx; | |
84 | dump->regs.esi = regs->si; | |
85 | dump->regs.edi = regs->di; | |
86 | dump->regs.ebp = regs->bp; | |
87 | dump->regs.eax = regs->ax; | |
1da177e4 LT |
88 | dump->regs.ds = current->thread.ds; |
89 | dump->regs.es = current->thread.es; | |
b6edbb1e JF |
90 | savesegment(fs, fs); |
91 | dump->regs.fs = fs; | |
92 | savesegment(gs, gs); | |
93 | dump->regs.gs = gs; | |
7d2f551f AV |
94 | dump->regs.orig_eax = regs->orig_ax; |
95 | dump->regs.eip = regs->ip; | |
1da177e4 | 96 | dump->regs.cs = regs->cs; |
7d2f551f AV |
97 | dump->regs.eflags = regs->flags; |
98 | dump->regs.esp = regs->sp; | |
1da177e4 LT |
99 | dump->regs.ss = regs->ss; |
100 | ||
101 | #if 1 /* FIXME */ | |
102 | dump->u_fpvalid = 0; | |
103 | #else | |
8edf8bee | 104 | dump->u_fpvalid = dump_fpu(regs, &dump->i387); |
1da177e4 LT |
105 | #endif |
106 | } | |
107 | ||
108 | #endif | |
109 | ||
110 | static struct linux_binfmt aout_format = { | |
111 | .module = THIS_MODULE, | |
112 | .load_binary = load_aout_binary, | |
113 | .load_shlib = load_aout_library, | |
7d2f551f | 114 | #ifdef CONFIG_COREDUMP |
1da177e4 LT |
115 | .core_dump = aout_core_dump, |
116 | #endif | |
117 | .min_coredump = PAGE_SIZE | |
118 | }; | |
119 | ||
5d22fc25 | 120 | static int set_brk(unsigned long start, unsigned long end) |
1da177e4 LT |
121 | { |
122 | start = PAGE_ALIGN(start); | |
123 | end = PAGE_ALIGN(end); | |
124 | if (end <= start) | |
5d22fc25 | 125 | return 0; |
864778b1 | 126 | return vm_brk(start, end - start); |
1da177e4 LT |
127 | } |
128 | ||
7d2f551f | 129 | #ifdef CONFIG_COREDUMP |
1da177e4 LT |
130 | /* |
131 | * These are the only things you should do on a core-file: use only these | |
132 | * macros to write out all the necessary info. | |
133 | */ | |
134 | ||
0eead9ab | 135 | #include <linux/coredump.h> |
1da177e4 | 136 | |
7d2f551f | 137 | #define START_DATA(u) (u.u_tsize << PAGE_SHIFT) |
8edf8bee | 138 | #define START_STACK(u) (u.start_stack) |
1da177e4 LT |
139 | |
140 | /* | |
141 | * Routine writes a core dump image in the current directory. | |
142 | * Currently only a stub-function. | |
143 | * | |
144 | * Note that setuid/setgid files won't make a core-dump if the uid/gid | |
145 | * changed due to the set[u|g]id. It's enforced by the "current->mm->dumpable" | |
146 | * field, which also makes sure the core-dumps won't be recursive if the | |
147 | * dumping of the process results in another error.. | |
148 | */ | |
149 | ||
7d2f551f | 150 | static int aout_core_dump(struct coredump_params *cprm) |
1da177e4 LT |
151 | { |
152 | mm_segment_t fs; | |
153 | int has_dumped = 0; | |
154 | unsigned long dump_start, dump_size; | |
155 | struct user32 dump; | |
1da177e4 LT |
156 | |
157 | fs = get_fs(); | |
158 | set_fs(KERNEL_DS); | |
159 | has_dumped = 1; | |
10970e1b BP |
160 | |
161 | fill_dump(cprm->regs, &dump); | |
162 | ||
8edf8bee | 163 | strncpy(dump.u_comm, current->comm, sizeof(current->comm)); |
6e16d89b | 164 | dump.u_ar0 = offsetof(struct user32, regs); |
7d2f551f | 165 | dump.signal = cprm->siginfo->si_signo; |
1da177e4 | 166 | |
8edf8bee TG |
167 | /* |
168 | * If the size of the dump file exceeds the rlimit, then see | |
169 | * what would happen if we wrote the stack, but not the data | |
170 | * area. | |
171 | */ | |
7d2f551f | 172 | if ((dump.u_dsize + dump.u_ssize + 1) * PAGE_SIZE > cprm->limit) |
1da177e4 LT |
173 | dump.u_dsize = 0; |
174 | ||
8edf8bee | 175 | /* Make sure we have enough room to write the stack and data areas. */ |
7d2f551f | 176 | if ((dump.u_ssize + 1) * PAGE_SIZE > cprm->limit) |
1da177e4 LT |
177 | dump.u_ssize = 0; |
178 | ||
8edf8bee | 179 | /* make sure we actually have a data and stack area to dump */ |
1da177e4 | 180 | set_fs(USER_DS); |
96d4f267 | 181 | if (!access_ok((void *) (unsigned long)START_DATA(dump), |
8edf8bee | 182 | dump.u_dsize << PAGE_SHIFT)) |
1da177e4 | 183 | dump.u_dsize = 0; |
96d4f267 | 184 | if (!access_ok((void *) (unsigned long)START_STACK(dump), |
8edf8bee | 185 | dump.u_ssize << PAGE_SHIFT)) |
1da177e4 LT |
186 | dump.u_ssize = 0; |
187 | ||
188 | set_fs(KERNEL_DS); | |
8edf8bee | 189 | /* struct user */ |
43a5d548 AV |
190 | if (!dump_emit(cprm, &dump, sizeof(dump))) |
191 | goto end_coredump; | |
8edf8bee | 192 | /* Now dump all of the user data. Include malloced stuff as well */ |
9b56d543 | 193 | if (!dump_skip(cprm, PAGE_SIZE - sizeof(dump))) |
43a5d548 | 194 | goto end_coredump; |
8edf8bee | 195 | /* now we start writing out the user space info */ |
1da177e4 | 196 | set_fs(USER_DS); |
8edf8bee | 197 | /* Dump the data area */ |
1da177e4 LT |
198 | if (dump.u_dsize != 0) { |
199 | dump_start = START_DATA(dump); | |
200 | dump_size = dump.u_dsize << PAGE_SHIFT; | |
43a5d548 AV |
201 | if (!dump_emit(cprm, (void *)dump_start, dump_size)) |
202 | goto end_coredump; | |
1da177e4 | 203 | } |
8edf8bee | 204 | /* Now prepare to dump the stack area */ |
1da177e4 LT |
205 | if (dump.u_ssize != 0) { |
206 | dump_start = START_STACK(dump); | |
207 | dump_size = dump.u_ssize << PAGE_SHIFT; | |
43a5d548 AV |
208 | if (!dump_emit(cprm, (void *)dump_start, dump_size)) |
209 | goto end_coredump; | |
1da177e4 | 210 | } |
1da177e4 LT |
211 | end_coredump: |
212 | set_fs(fs); | |
213 | return has_dumped; | |
214 | } | |
215 | #endif | |
216 | ||
217 | /* | |
218 | * create_aout_tables() parses the env- and arg-strings in new user | |
219 | * memory and creates the pointer tables from them, and puts their | |
220 | * addresses on the "stack", returning the new stack pointer value. | |
221 | */ | |
222 | static u32 __user *create_aout_tables(char __user *p, struct linux_binprm *bprm) | |
223 | { | |
8edf8bee TG |
224 | u32 __user *argv, *envp, *sp; |
225 | int argc = bprm->argc, envc = bprm->envc; | |
1da177e4 LT |
226 | |
227 | sp = (u32 __user *) ((-(unsigned long)sizeof(u32)) & (unsigned long) p); | |
228 | sp -= envc+1; | |
229 | envp = sp; | |
230 | sp -= argc+1; | |
231 | argv = sp; | |
8edf8bee TG |
232 | put_user((unsigned long) envp, --sp); |
233 | put_user((unsigned long) argv, --sp); | |
234 | put_user(argc, --sp); | |
1da177e4 | 235 | current->mm->arg_start = (unsigned long) p; |
8edf8bee | 236 | while (argc-- > 0) { |
1da177e4 | 237 | char c; |
8edf8bee TG |
238 | |
239 | put_user((u32)(unsigned long)p, argv++); | |
1da177e4 | 240 | do { |
8edf8bee | 241 | get_user(c, p++); |
1da177e4 LT |
242 | } while (c); |
243 | } | |
74019699 | 244 | put_user(0, argv); |
1da177e4 | 245 | current->mm->arg_end = current->mm->env_start = (unsigned long) p; |
8edf8bee | 246 | while (envc-- > 0) { |
1da177e4 | 247 | char c; |
8edf8bee TG |
248 | |
249 | put_user((u32)(unsigned long)p, envp++); | |
1da177e4 | 250 | do { |
8edf8bee | 251 | get_user(c, p++); |
1da177e4 LT |
252 | } while (c); |
253 | } | |
74019699 | 254 | put_user(0, envp); |
1da177e4 LT |
255 | current->mm->env_end = (unsigned long) p; |
256 | return sp; | |
257 | } | |
258 | ||
259 | /* | |
260 | * These are the functions used to load a.out style executables and shared | |
261 | * libraries. There is no binary dependent code anywhere else. | |
262 | */ | |
71613c3b | 263 | static int load_aout_binary(struct linux_binprm *bprm) |
1da177e4 | 264 | { |
8edf8bee | 265 | unsigned long error, fd_offset, rlim; |
71613c3b | 266 | struct pt_regs *regs = current_pt_regs(); |
1da177e4 | 267 | struct exec ex; |
1da177e4 LT |
268 | int retval; |
269 | ||
270 | ex = *((struct exec *) bprm->buf); /* exec-header */ | |
271 | if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != OMAGIC && | |
272 | N_MAGIC(ex) != QMAGIC && N_MAGIC(ex) != NMAGIC) || | |
273 | N_TRSIZE(ex) || N_DRSIZE(ex) || | |
496ad9aa | 274 | i_size_read(file_inode(bprm->file)) < |
8edf8bee | 275 | ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) { |
1da177e4 LT |
276 | return -ENOEXEC; |
277 | } | |
278 | ||
279 | fd_offset = N_TXTOFF(ex); | |
280 | ||
281 | /* Check initial limits. This avoids letting people circumvent | |
282 | * size limits imposed on them by creating programs with large | |
283 | * arrays in the data or bss. | |
284 | */ | |
2854e72b | 285 | rlim = rlimit(RLIMIT_DATA); |
1da177e4 LT |
286 | if (rlim >= RLIM_INFINITY) |
287 | rlim = ~0; | |
288 | if (ex.a_data + ex.a_bss > rlim) | |
289 | return -ENOMEM; | |
290 | ||
291 | /* Flush all traces of the currently running executable */ | |
292 | retval = flush_old_exec(bprm); | |
293 | if (retval) | |
294 | return retval; | |
295 | ||
1da177e4 LT |
296 | /* OK, This is the point of no return */ |
297 | set_personality(PER_LINUX); | |
ce7e5d2d | 298 | set_personality_ia32(false); |
1da177e4 | 299 | |
221af7f8 LT |
300 | setup_new_exec(bprm); |
301 | ||
302 | regs->cs = __USER32_CS; | |
303 | regs->r8 = regs->r9 = regs->r10 = regs->r11 = regs->r12 = | |
304 | regs->r13 = regs->r14 = regs->r15 = 0; | |
305 | ||
1da177e4 LT |
306 | current->mm->end_code = ex.a_text + |
307 | (current->mm->start_code = N_TXTADDR(ex)); | |
308 | current->mm->end_data = ex.a_data + | |
309 | (current->mm->start_data = N_DATADDR(ex)); | |
310 | current->mm->brk = ex.a_bss + | |
311 | (current->mm->start_brk = N_BSSADDR(ex)); | |
1da177e4 | 312 | |
6414fa6a | 313 | retval = setup_arg_pages(bprm, IA32_STACK_TOP, EXSTACK_DEFAULT); |
19d860a1 | 314 | if (retval < 0) |
6414fa6a | 315 | return retval; |
6414fa6a | 316 | |
a6f76f23 | 317 | install_exec_creds(bprm); |
1da177e4 LT |
318 | |
319 | if (N_MAGIC(ex) == OMAGIC) { | |
320 | unsigned long text_addr, map_size; | |
1da177e4 LT |
321 | |
322 | text_addr = N_TXTADDR(ex); | |
1da177e4 LT |
323 | map_size = ex.a_text+ex.a_data; |
324 | ||
e4eb1ff6 | 325 | error = vm_brk(text_addr & PAGE_MASK, map_size); |
1da177e4 | 326 | |
5d22fc25 | 327 | if (error) |
1da177e4 | 328 | return error; |
1da177e4 | 329 | |
3dc20cb2 AV |
330 | error = read_code(bprm->file, text_addr, 32, |
331 | ex.a_text + ex.a_data); | |
19d860a1 | 332 | if ((signed long)error < 0) |
1da177e4 | 333 | return error; |
1da177e4 LT |
334 | } else { |
335 | #ifdef WARN_OLD | |
336 | static unsigned long error_time, error_time2; | |
337 | if ((ex.a_text & 0xfff || ex.a_data & 0xfff) && | |
e5fc3161 JL |
338 | (N_MAGIC(ex) != NMAGIC) && |
339 | time_after(jiffies, error_time2 + 5*HZ)) { | |
1da177e4 LT |
340 | printk(KERN_NOTICE "executable not page aligned\n"); |
341 | error_time2 = jiffies; | |
342 | } | |
343 | ||
344 | if ((fd_offset & ~PAGE_MASK) != 0 && | |
e5fc3161 | 345 | time_after(jiffies, error_time + 5*HZ)) { |
8edf8bee TG |
346 | printk(KERN_WARNING |
347 | "fd_offset is not page aligned. Please convert " | |
a455589f AV |
348 | "program: %pD\n", |
349 | bprm->file); | |
1da177e4 LT |
350 | error_time = jiffies; |
351 | } | |
352 | #endif | |
353 | ||
8edf8bee | 354 | if (!bprm->file->f_op->mmap || (fd_offset & ~PAGE_MASK) != 0) { |
864778b1 | 355 | error = vm_brk(N_TXTADDR(ex), ex.a_text+ex.a_data); |
5d22fc25 | 356 | if (error) |
864778b1 MH |
357 | return error; |
358 | ||
3dc20cb2 AV |
359 | read_code(bprm->file, N_TXTADDR(ex), fd_offset, |
360 | ex.a_text+ex.a_data); | |
1da177e4 LT |
361 | goto beyond_if; |
362 | } | |
363 | ||
6be5ceb0 | 364 | error = vm_mmap(bprm->file, N_TXTADDR(ex), ex.a_text, |
8edf8bee TG |
365 | PROT_READ | PROT_EXEC, |
366 | MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | | |
367 | MAP_EXECUTABLE | MAP_32BIT, | |
368 | fd_offset); | |
1da177e4 | 369 | |
19d860a1 | 370 | if (error != N_TXTADDR(ex)) |
1da177e4 | 371 | return error; |
1da177e4 | 372 | |
6be5ceb0 | 373 | error = vm_mmap(bprm->file, N_DATADDR(ex), ex.a_data, |
1da177e4 | 374 | PROT_READ | PROT_WRITE | PROT_EXEC, |
8edf8bee TG |
375 | MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | |
376 | MAP_EXECUTABLE | MAP_32BIT, | |
1da177e4 | 377 | fd_offset + ex.a_text); |
19d860a1 | 378 | if (error != N_DATADDR(ex)) |
1da177e4 | 379 | return error; |
1da177e4 | 380 | } |
864778b1 | 381 | |
1da177e4 | 382 | beyond_if: |
864778b1 | 383 | error = set_brk(current->mm->start_brk, current->mm->brk); |
5d22fc25 | 384 | if (error) |
864778b1 | 385 | return error; |
1da177e4 | 386 | |
864778b1 | 387 | set_binfmt(&aout_format); |
1da177e4 | 388 | |
1da177e4 LT |
389 | current->mm->start_stack = |
390 | (unsigned long)create_aout_tables((char __user *)bprm->p, bprm); | |
391 | /* start thread */ | |
b6edbb1e JF |
392 | loadsegment(fs, 0); |
393 | loadsegment(ds, __USER32_DS); | |
394 | loadsegment(es, __USER32_DS); | |
8edf8bee | 395 | load_gs_index(0); |
65ea5b03 PA |
396 | (regs)->ip = ex.a_entry; |
397 | (regs)->sp = current->mm->start_stack; | |
398 | (regs)->flags = 0x200; | |
1da177e4 LT |
399 | (regs)->cs = __USER32_CS; |
400 | (regs)->ss = __USER32_DS; | |
f891dd18 AK |
401 | regs->r8 = regs->r9 = regs->r10 = regs->r11 = |
402 | regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0; | |
1da177e4 | 403 | set_fs(USER_DS); |
1da177e4 LT |
404 | return 0; |
405 | } | |
406 | ||
407 | static int load_aout_library(struct file *file) | |
408 | { | |
8edf8bee | 409 | unsigned long bss, start_addr, len, error; |
1da177e4 LT |
410 | int retval; |
411 | struct exec ex; | |
bdd1d2d3 | 412 | loff_t pos = 0; |
1da177e4 LT |
413 | |
414 | retval = -ENOEXEC; | |
bdd1d2d3 | 415 | error = kernel_read(file, &ex, sizeof(ex), &pos); |
1da177e4 LT |
416 | if (error != sizeof(ex)) |
417 | goto out; | |
418 | ||
419 | /* We come in here for the regular a.out style of shared libraries */ | |
420 | if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != QMAGIC) || N_TRSIZE(ex) || | |
421 | N_DRSIZE(ex) || ((ex.a_entry & 0xfff) && N_MAGIC(ex) == ZMAGIC) || | |
496ad9aa | 422 | i_size_read(file_inode(file)) < |
8edf8bee | 423 | ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) { |
1da177e4 LT |
424 | goto out; |
425 | } | |
426 | ||
427 | if (N_FLAGS(ex)) | |
428 | goto out; | |
429 | ||
430 | /* For QMAGIC, the starting address is 0x20 into the page. We mask | |
431 | this off to get the starting address for the page */ | |
432 | ||
433 | start_addr = ex.a_entry & 0xfffff000; | |
434 | ||
435 | if ((N_TXTOFF(ex) & ~PAGE_MASK) != 0) { | |
1da177e4 LT |
436 | #ifdef WARN_OLD |
437 | static unsigned long error_time; | |
e5fc3161 | 438 | if (time_after(jiffies, error_time + 5*HZ)) { |
8edf8bee TG |
439 | printk(KERN_WARNING |
440 | "N_TXTOFF is not page aligned. Please convert " | |
a455589f AV |
441 | "library: %pD\n", |
442 | file); | |
1da177e4 LT |
443 | error_time = jiffies; |
444 | } | |
445 | #endif | |
864778b1 | 446 | retval = vm_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss); |
5d22fc25 | 447 | if (retval) |
864778b1 | 448 | goto out; |
8edf8bee | 449 | |
3dc20cb2 AV |
450 | read_code(file, start_addr, N_TXTOFF(ex), |
451 | ex.a_text + ex.a_data); | |
1da177e4 LT |
452 | retval = 0; |
453 | goto out; | |
454 | } | |
455 | /* Now use mmap to map the library into memory. */ | |
6be5ceb0 | 456 | error = vm_mmap(file, start_addr, ex.a_text + ex.a_data, |
1da177e4 LT |
457 | PROT_READ | PROT_WRITE | PROT_EXEC, |
458 | MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_32BIT, | |
459 | N_TXTOFF(ex)); | |
1da177e4 LT |
460 | retval = error; |
461 | if (error != start_addr) | |
462 | goto out; | |
463 | ||
464 | len = PAGE_ALIGN(ex.a_text + ex.a_data); | |
465 | bss = ex.a_text + ex.a_data + ex.a_bss; | |
466 | if (bss > len) { | |
5d22fc25 LT |
467 | retval = vm_brk(start_addr + len, bss - len); |
468 | if (retval) | |
1da177e4 LT |
469 | goto out; |
470 | } | |
471 | retval = 0; | |
472 | out: | |
473 | return retval; | |
474 | } | |
475 | ||
476 | static int __init init_aout_binfmt(void) | |
477 | { | |
8fc3dc5a AV |
478 | register_binfmt(&aout_format); |
479 | return 0; | |
1da177e4 LT |
480 | } |
481 | ||
482 | static void __exit exit_aout_binfmt(void) | |
483 | { | |
484 | unregister_binfmt(&aout_format); | |
485 | } | |
486 | ||
487 | module_init(init_aout_binfmt); | |
488 | module_exit(exit_aout_binfmt); | |
489 | MODULE_LICENSE("GPL"); |