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1da177e4 LT |
1 | /* |
2 | * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on | |
3 | * sys_sparc32 | |
4 | * | |
5 | * Copyright (C) 2000 VA Linux Co | |
6 | * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> | |
7 | * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> | |
8 | * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
9 | * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) | |
10 | * Copyright (C) 2000 Hewlett-Packard Co. | |
11 | * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com> | |
12 | * Copyright (C) 2000,2001,2002 Andi Kleen, SuSE Labs (x86-64 port) | |
13 | * | |
14 | * These routines maintain argument size conversion between 32bit and 64bit | |
15 | * environment. In 2.5 most of this should be moved to a generic directory. | |
16 | * | |
17 | * This file assumes that there is a hole at the end of user address space. | |
18 | * | |
19 | * Some of the functions are LE specific currently. These are hopefully all marked. | |
20 | * This should be fixed. | |
21 | */ | |
22 | ||
1da177e4 LT |
23 | #include <linux/kernel.h> |
24 | #include <linux/sched.h> | |
25 | #include <linux/fs.h> | |
26 | #include <linux/file.h> | |
27 | #include <linux/signal.h> | |
28 | #include <linux/syscalls.h> | |
29 | #include <linux/resource.h> | |
30 | #include <linux/times.h> | |
31 | #include <linux/utsname.h> | |
1da177e4 LT |
32 | #include <linux/smp.h> |
33 | #include <linux/smp_lock.h> | |
34 | #include <linux/sem.h> | |
35 | #include <linux/msg.h> | |
36 | #include <linux/mm.h> | |
37 | #include <linux/shm.h> | |
38 | #include <linux/slab.h> | |
39 | #include <linux/uio.h> | |
40 | #include <linux/nfs_fs.h> | |
41 | #include <linux/quota.h> | |
42 | #include <linux/module.h> | |
43 | #include <linux/sunrpc/svc.h> | |
44 | #include <linux/nfsd/nfsd.h> | |
45 | #include <linux/nfsd/cache.h> | |
46 | #include <linux/nfsd/xdr.h> | |
47 | #include <linux/nfsd/syscall.h> | |
48 | #include <linux/poll.h> | |
49 | #include <linux/personality.h> | |
50 | #include <linux/stat.h> | |
51 | #include <linux/ipc.h> | |
52 | #include <linux/rwsem.h> | |
53 | #include <linux/binfmts.h> | |
54 | #include <linux/init.h> | |
55 | #include <linux/aio_abi.h> | |
56 | #include <linux/aio.h> | |
57 | #include <linux/compat.h> | |
58 | #include <linux/vfs.h> | |
59 | #include <linux/ptrace.h> | |
60 | #include <linux/highuid.h> | |
61 | #include <linux/vmalloc.h> | |
9e566d8b | 62 | #include <linux/fsnotify.h> |
ddb15ec1 | 63 | #include <linux/sysctl.h> |
1da177e4 LT |
64 | #include <asm/mman.h> |
65 | #include <asm/types.h> | |
66 | #include <asm/uaccess.h> | |
67 | #include <asm/semaphore.h> | |
68 | #include <asm/atomic.h> | |
69 | #include <asm/ldt.h> | |
70 | ||
71 | #include <net/scm.h> | |
72 | #include <net/sock.h> | |
73 | #include <asm/ia32.h> | |
74 | ||
75 | #define AA(__x) ((unsigned long)(__x)) | |
76 | ||
77 | int cp_compat_stat(struct kstat *kbuf, struct compat_stat __user *ubuf) | |
78 | { | |
79 | typeof(ubuf->st_uid) uid = 0; | |
80 | typeof(ubuf->st_gid) gid = 0; | |
81 | SET_UID(uid, kbuf->uid); | |
82 | SET_GID(gid, kbuf->gid); | |
83 | if (!old_valid_dev(kbuf->dev) || !old_valid_dev(kbuf->rdev)) | |
84 | return -EOVERFLOW; | |
85 | if (kbuf->size >= 0x7fffffff) | |
86 | return -EOVERFLOW; | |
87 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct compat_stat)) || | |
88 | __put_user (old_encode_dev(kbuf->dev), &ubuf->st_dev) || | |
89 | __put_user (kbuf->ino, &ubuf->st_ino) || | |
90 | __put_user (kbuf->mode, &ubuf->st_mode) || | |
91 | __put_user (kbuf->nlink, &ubuf->st_nlink) || | |
92 | __put_user (uid, &ubuf->st_uid) || | |
93 | __put_user (gid, &ubuf->st_gid) || | |
94 | __put_user (old_encode_dev(kbuf->rdev), &ubuf->st_rdev) || | |
95 | __put_user (kbuf->size, &ubuf->st_size) || | |
96 | __put_user (kbuf->atime.tv_sec, &ubuf->st_atime) || | |
97 | __put_user (kbuf->atime.tv_nsec, &ubuf->st_atime_nsec) || | |
98 | __put_user (kbuf->mtime.tv_sec, &ubuf->st_mtime) || | |
99 | __put_user (kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec) || | |
100 | __put_user (kbuf->ctime.tv_sec, &ubuf->st_ctime) || | |
101 | __put_user (kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec) || | |
102 | __put_user (kbuf->blksize, &ubuf->st_blksize) || | |
103 | __put_user (kbuf->blocks, &ubuf->st_blocks)) | |
104 | return -EFAULT; | |
105 | return 0; | |
106 | } | |
107 | ||
108 | asmlinkage long | |
109 | sys32_truncate64(char __user * filename, unsigned long offset_low, unsigned long offset_high) | |
110 | { | |
111 | return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low); | |
112 | } | |
113 | ||
114 | asmlinkage long | |
115 | sys32_ftruncate64(unsigned int fd, unsigned long offset_low, unsigned long offset_high) | |
116 | { | |
117 | return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low); | |
118 | } | |
119 | ||
120 | /* Another set for IA32/LFS -- x86_64 struct stat is different due to | |
121 | support for 64bit inode numbers. */ | |
122 | ||
123 | static int | |
124 | cp_stat64(struct stat64 __user *ubuf, struct kstat *stat) | |
125 | { | |
126 | typeof(ubuf->st_uid) uid = 0; | |
127 | typeof(ubuf->st_gid) gid = 0; | |
128 | SET_UID(uid, stat->uid); | |
129 | SET_GID(gid, stat->gid); | |
130 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) || | |
131 | __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) || | |
132 | __put_user (stat->ino, &ubuf->__st_ino) || | |
133 | __put_user (stat->ino, &ubuf->st_ino) || | |
134 | __put_user (stat->mode, &ubuf->st_mode) || | |
135 | __put_user (stat->nlink, &ubuf->st_nlink) || | |
136 | __put_user (uid, &ubuf->st_uid) || | |
137 | __put_user (gid, &ubuf->st_gid) || | |
138 | __put_user (huge_encode_dev(stat->rdev), &ubuf->st_rdev) || | |
139 | __put_user (stat->size, &ubuf->st_size) || | |
140 | __put_user (stat->atime.tv_sec, &ubuf->st_atime) || | |
141 | __put_user (stat->atime.tv_nsec, &ubuf->st_atime_nsec) || | |
142 | __put_user (stat->mtime.tv_sec, &ubuf->st_mtime) || | |
143 | __put_user (stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) || | |
144 | __put_user (stat->ctime.tv_sec, &ubuf->st_ctime) || | |
145 | __put_user (stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) || | |
146 | __put_user (stat->blksize, &ubuf->st_blksize) || | |
147 | __put_user (stat->blocks, &ubuf->st_blocks)) | |
148 | return -EFAULT; | |
149 | return 0; | |
150 | } | |
151 | ||
152 | asmlinkage long | |
153 | sys32_stat64(char __user * filename, struct stat64 __user *statbuf) | |
154 | { | |
155 | struct kstat stat; | |
156 | int ret = vfs_stat(filename, &stat); | |
157 | if (!ret) | |
158 | ret = cp_stat64(statbuf, &stat); | |
159 | return ret; | |
160 | } | |
161 | ||
162 | asmlinkage long | |
163 | sys32_lstat64(char __user * filename, struct stat64 __user *statbuf) | |
164 | { | |
165 | struct kstat stat; | |
166 | int ret = vfs_lstat(filename, &stat); | |
167 | if (!ret) | |
168 | ret = cp_stat64(statbuf, &stat); | |
169 | return ret; | |
170 | } | |
171 | ||
172 | asmlinkage long | |
173 | sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf) | |
174 | { | |
175 | struct kstat stat; | |
176 | int ret = vfs_fstat(fd, &stat); | |
177 | if (!ret) | |
178 | ret = cp_stat64(statbuf, &stat); | |
179 | return ret; | |
180 | } | |
181 | ||
cff2b760 UD |
182 | asmlinkage long |
183 | sys32_fstatat(unsigned int dfd, char __user *filename, | |
184 | struct stat64 __user* statbuf, int flag) | |
185 | { | |
186 | struct kstat stat; | |
187 | int error = -EINVAL; | |
188 | ||
189 | if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) | |
190 | goto out; | |
191 | ||
192 | if (flag & AT_SYMLINK_NOFOLLOW) | |
193 | error = vfs_lstat_fd(dfd, filename, &stat); | |
194 | else | |
195 | error = vfs_stat_fd(dfd, filename, &stat); | |
196 | ||
197 | if (!error) | |
198 | error = cp_stat64(statbuf, &stat); | |
199 | ||
200 | out: | |
201 | return error; | |
202 | } | |
203 | ||
1da177e4 LT |
204 | /* |
205 | * Linux/i386 didn't use to be able to handle more than | |
206 | * 4 system call parameters, so these system calls used a memory | |
207 | * block for parameter passing.. | |
208 | */ | |
209 | ||
210 | struct mmap_arg_struct { | |
211 | unsigned int addr; | |
212 | unsigned int len; | |
213 | unsigned int prot; | |
214 | unsigned int flags; | |
215 | unsigned int fd; | |
216 | unsigned int offset; | |
217 | }; | |
218 | ||
219 | asmlinkage long | |
220 | sys32_mmap(struct mmap_arg_struct __user *arg) | |
221 | { | |
222 | struct mmap_arg_struct a; | |
223 | struct file *file = NULL; | |
224 | unsigned long retval; | |
225 | struct mm_struct *mm ; | |
226 | ||
227 | if (copy_from_user(&a, arg, sizeof(a))) | |
228 | return -EFAULT; | |
229 | ||
230 | if (a.offset & ~PAGE_MASK) | |
231 | return -EINVAL; | |
232 | ||
233 | if (!(a.flags & MAP_ANONYMOUS)) { | |
234 | file = fget(a.fd); | |
235 | if (!file) | |
236 | return -EBADF; | |
237 | } | |
238 | ||
239 | mm = current->mm; | |
240 | down_write(&mm->mmap_sem); | |
241 | retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, a.offset>>PAGE_SHIFT); | |
242 | if (file) | |
243 | fput(file); | |
244 | ||
245 | up_write(&mm->mmap_sem); | |
246 | ||
247 | return retval; | |
248 | } | |
249 | ||
250 | asmlinkage long | |
251 | sys32_mprotect(unsigned long start, size_t len, unsigned long prot) | |
252 | { | |
253 | return sys_mprotect(start,len,prot); | |
254 | } | |
255 | ||
256 | asmlinkage long | |
257 | sys32_pipe(int __user *fd) | |
258 | { | |
259 | int retval; | |
260 | int fds[2]; | |
261 | ||
262 | retval = do_pipe(fds); | |
263 | if (retval) | |
264 | goto out; | |
265 | if (copy_to_user(fd, fds, sizeof(fds))) | |
266 | retval = -EFAULT; | |
267 | out: | |
268 | return retval; | |
269 | } | |
270 | ||
271 | asmlinkage long | |
272 | sys32_rt_sigaction(int sig, struct sigaction32 __user *act, | |
273 | struct sigaction32 __user *oact, unsigned int sigsetsize) | |
274 | { | |
275 | struct k_sigaction new_ka, old_ka; | |
276 | int ret; | |
277 | compat_sigset_t set32; | |
278 | ||
279 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
280 | if (sigsetsize != sizeof(compat_sigset_t)) | |
281 | return -EINVAL; | |
282 | ||
283 | if (act) { | |
284 | compat_uptr_t handler, restorer; | |
285 | ||
286 | if (!access_ok(VERIFY_READ, act, sizeof(*act)) || | |
287 | __get_user(handler, &act->sa_handler) || | |
288 | __get_user(new_ka.sa.sa_flags, &act->sa_flags) || | |
289 | __get_user(restorer, &act->sa_restorer)|| | |
290 | __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t))) | |
291 | return -EFAULT; | |
292 | new_ka.sa.sa_handler = compat_ptr(handler); | |
293 | new_ka.sa.sa_restorer = compat_ptr(restorer); | |
294 | /* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */ | |
295 | switch (_NSIG_WORDS) { | |
296 | case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | |
297 | | (((long)set32.sig[7]) << 32); | |
298 | case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | |
299 | | (((long)set32.sig[5]) << 32); | |
300 | case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | |
301 | | (((long)set32.sig[3]) << 32); | |
302 | case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | |
303 | | (((long)set32.sig[1]) << 32); | |
304 | } | |
305 | } | |
306 | ||
307 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); | |
308 | ||
309 | if (!ret && oact) { | |
310 | /* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */ | |
311 | switch (_NSIG_WORDS) { | |
312 | case 4: | |
313 | set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); | |
314 | set32.sig[6] = old_ka.sa.sa_mask.sig[3]; | |
315 | case 3: | |
316 | set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); | |
317 | set32.sig[4] = old_ka.sa.sa_mask.sig[2]; | |
318 | case 2: | |
319 | set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); | |
320 | set32.sig[2] = old_ka.sa.sa_mask.sig[1]; | |
321 | case 1: | |
322 | set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); | |
323 | set32.sig[0] = old_ka.sa.sa_mask.sig[0]; | |
324 | } | |
325 | if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || | |
326 | __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) || | |
327 | __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) || | |
328 | __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || | |
329 | __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t))) | |
330 | return -EFAULT; | |
331 | } | |
332 | ||
333 | return ret; | |
334 | } | |
335 | ||
336 | asmlinkage long | |
337 | sys32_sigaction (int sig, struct old_sigaction32 __user *act, struct old_sigaction32 __user *oact) | |
338 | { | |
339 | struct k_sigaction new_ka, old_ka; | |
340 | int ret; | |
341 | ||
342 | if (act) { | |
343 | compat_old_sigset_t mask; | |
344 | compat_uptr_t handler, restorer; | |
345 | ||
346 | if (!access_ok(VERIFY_READ, act, sizeof(*act)) || | |
347 | __get_user(handler, &act->sa_handler) || | |
348 | __get_user(new_ka.sa.sa_flags, &act->sa_flags) || | |
349 | __get_user(restorer, &act->sa_restorer) || | |
350 | __get_user(mask, &act->sa_mask)) | |
351 | return -EFAULT; | |
352 | ||
353 | new_ka.sa.sa_handler = compat_ptr(handler); | |
354 | new_ka.sa.sa_restorer = compat_ptr(restorer); | |
355 | ||
356 | siginitset(&new_ka.sa.sa_mask, mask); | |
357 | } | |
358 | ||
359 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); | |
360 | ||
361 | if (!ret && oact) { | |
362 | if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || | |
363 | __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) || | |
364 | __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) || | |
365 | __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || | |
366 | __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) | |
367 | return -EFAULT; | |
368 | } | |
369 | ||
370 | return ret; | |
371 | } | |
372 | ||
373 | asmlinkage long | |
374 | sys32_rt_sigprocmask(int how, compat_sigset_t __user *set, | |
375 | compat_sigset_t __user *oset, unsigned int sigsetsize) | |
376 | { | |
377 | sigset_t s; | |
378 | compat_sigset_t s32; | |
379 | int ret; | |
380 | mm_segment_t old_fs = get_fs(); | |
381 | ||
382 | if (set) { | |
383 | if (copy_from_user (&s32, set, sizeof(compat_sigset_t))) | |
384 | return -EFAULT; | |
385 | switch (_NSIG_WORDS) { | |
386 | case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32); | |
387 | case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32); | |
388 | case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32); | |
389 | case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32); | |
390 | } | |
391 | } | |
392 | set_fs (KERNEL_DS); | |
ddb15ec1 AK |
393 | ret = sys_rt_sigprocmask(how, |
394 | set ? (sigset_t __user *)&s : NULL, | |
395 | oset ? (sigset_t __user *)&s : NULL, | |
1da177e4 LT |
396 | sigsetsize); |
397 | set_fs (old_fs); | |
398 | if (ret) return ret; | |
399 | if (oset) { | |
400 | switch (_NSIG_WORDS) { | |
401 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; | |
402 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; | |
403 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; | |
404 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; | |
405 | } | |
406 | if (copy_to_user (oset, &s32, sizeof(compat_sigset_t))) | |
407 | return -EFAULT; | |
408 | } | |
409 | return 0; | |
410 | } | |
411 | ||
412 | static inline long | |
413 | get_tv32(struct timeval *o, struct compat_timeval __user *i) | |
414 | { | |
415 | int err = -EFAULT; | |
416 | if (access_ok(VERIFY_READ, i, sizeof(*i))) { | |
417 | err = __get_user(o->tv_sec, &i->tv_sec); | |
418 | err |= __get_user(o->tv_usec, &i->tv_usec); | |
419 | } | |
420 | return err; | |
421 | } | |
422 | ||
423 | static inline long | |
424 | put_tv32(struct compat_timeval __user *o, struct timeval *i) | |
425 | { | |
426 | int err = -EFAULT; | |
427 | if (access_ok(VERIFY_WRITE, o, sizeof(*o))) { | |
428 | err = __put_user(i->tv_sec, &o->tv_sec); | |
429 | err |= __put_user(i->tv_usec, &o->tv_usec); | |
430 | } | |
431 | return err; | |
432 | } | |
433 | ||
c08b8a49 | 434 | extern unsigned int alarm_setitimer(unsigned int seconds); |
1da177e4 LT |
435 | |
436 | asmlinkage long | |
437 | sys32_alarm(unsigned int seconds) | |
438 | { | |
c08b8a49 | 439 | return alarm_setitimer(seconds); |
1da177e4 LT |
440 | } |
441 | ||
442 | /* Translations due to time_t size differences. Which affects all | |
443 | sorts of things, like timeval and itimerval. */ | |
444 | ||
445 | extern struct timezone sys_tz; | |
446 | ||
447 | asmlinkage long | |
448 | sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) | |
449 | { | |
450 | if (tv) { | |
451 | struct timeval ktv; | |
452 | do_gettimeofday(&ktv); | |
453 | if (put_tv32(tv, &ktv)) | |
454 | return -EFAULT; | |
455 | } | |
456 | if (tz) { | |
457 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) | |
458 | return -EFAULT; | |
459 | } | |
460 | return 0; | |
461 | } | |
462 | ||
463 | asmlinkage long | |
464 | sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) | |
465 | { | |
466 | struct timeval ktv; | |
467 | struct timespec kts; | |
468 | struct timezone ktz; | |
469 | ||
470 | if (tv) { | |
471 | if (get_tv32(&ktv, tv)) | |
472 | return -EFAULT; | |
473 | kts.tv_sec = ktv.tv_sec; | |
474 | kts.tv_nsec = ktv.tv_usec * NSEC_PER_USEC; | |
475 | } | |
476 | if (tz) { | |
477 | if (copy_from_user(&ktz, tz, sizeof(ktz))) | |
478 | return -EFAULT; | |
479 | } | |
480 | ||
481 | return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); | |
482 | } | |
483 | ||
484 | struct sel_arg_struct { | |
485 | unsigned int n; | |
486 | unsigned int inp; | |
487 | unsigned int outp; | |
488 | unsigned int exp; | |
489 | unsigned int tvp; | |
490 | }; | |
491 | ||
492 | asmlinkage long | |
493 | sys32_old_select(struct sel_arg_struct __user *arg) | |
494 | { | |
495 | struct sel_arg_struct a; | |
496 | ||
497 | if (copy_from_user(&a, arg, sizeof(a))) | |
498 | return -EFAULT; | |
499 | return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp), | |
500 | compat_ptr(a.exp), compat_ptr(a.tvp)); | |
501 | } | |
502 | ||
503 | extern asmlinkage long | |
504 | compat_sys_wait4(compat_pid_t pid, compat_uint_t * stat_addr, int options, | |
505 | struct compat_rusage *ru); | |
506 | ||
507 | asmlinkage long | |
508 | sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options) | |
509 | { | |
510 | return compat_sys_wait4(pid, stat_addr, options, NULL); | |
511 | } | |
512 | ||
1da177e4 LT |
513 | /* 32-bit timeval and related flotsam. */ |
514 | ||
515 | asmlinkage long | |
516 | sys32_sysfs(int option, u32 arg1, u32 arg2) | |
517 | { | |
518 | return sys_sysfs(option, arg1, arg2); | |
519 | } | |
520 | ||
521 | struct sysinfo32 { | |
522 | s32 uptime; | |
523 | u32 loads[3]; | |
524 | u32 totalram; | |
525 | u32 freeram; | |
526 | u32 sharedram; | |
527 | u32 bufferram; | |
528 | u32 totalswap; | |
529 | u32 freeswap; | |
530 | unsigned short procs; | |
531 | unsigned short pad; | |
532 | u32 totalhigh; | |
533 | u32 freehigh; | |
534 | u32 mem_unit; | |
535 | char _f[20-2*sizeof(u32)-sizeof(int)]; | |
536 | }; | |
537 | ||
538 | asmlinkage long | |
539 | sys32_sysinfo(struct sysinfo32 __user *info) | |
540 | { | |
541 | struct sysinfo s; | |
542 | int ret; | |
543 | mm_segment_t old_fs = get_fs (); | |
544 | int bitcount = 0; | |
545 | ||
546 | set_fs (KERNEL_DS); | |
ddb15ec1 | 547 | ret = sys_sysinfo((struct sysinfo __user *)&s); |
1da177e4 LT |
548 | set_fs (old_fs); |
549 | ||
550 | /* Check to see if any memory value is too large for 32-bit and scale | |
551 | * down if needed | |
552 | */ | |
553 | if ((s.totalram >> 32) || (s.totalswap >> 32)) { | |
554 | while (s.mem_unit < PAGE_SIZE) { | |
555 | s.mem_unit <<= 1; | |
556 | bitcount++; | |
557 | } | |
558 | s.totalram >>= bitcount; | |
559 | s.freeram >>= bitcount; | |
560 | s.sharedram >>= bitcount; | |
561 | s.bufferram >>= bitcount; | |
562 | s.totalswap >>= bitcount; | |
563 | s.freeswap >>= bitcount; | |
564 | s.totalhigh >>= bitcount; | |
565 | s.freehigh >>= bitcount; | |
566 | } | |
567 | ||
568 | if (!access_ok(VERIFY_WRITE, info, sizeof(struct sysinfo32)) || | |
569 | __put_user (s.uptime, &info->uptime) || | |
570 | __put_user (s.loads[0], &info->loads[0]) || | |
571 | __put_user (s.loads[1], &info->loads[1]) || | |
572 | __put_user (s.loads[2], &info->loads[2]) || | |
573 | __put_user (s.totalram, &info->totalram) || | |
574 | __put_user (s.freeram, &info->freeram) || | |
575 | __put_user (s.sharedram, &info->sharedram) || | |
576 | __put_user (s.bufferram, &info->bufferram) || | |
577 | __put_user (s.totalswap, &info->totalswap) || | |
578 | __put_user (s.freeswap, &info->freeswap) || | |
579 | __put_user (s.procs, &info->procs) || | |
580 | __put_user (s.totalhigh, &info->totalhigh) || | |
581 | __put_user (s.freehigh, &info->freehigh) || | |
582 | __put_user (s.mem_unit, &info->mem_unit)) | |
583 | return -EFAULT; | |
584 | return 0; | |
585 | } | |
586 | ||
587 | asmlinkage long | |
588 | sys32_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval) | |
589 | { | |
590 | struct timespec t; | |
591 | int ret; | |
592 | mm_segment_t old_fs = get_fs (); | |
593 | ||
594 | set_fs (KERNEL_DS); | |
ddb15ec1 | 595 | ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t); |
1da177e4 LT |
596 | set_fs (old_fs); |
597 | if (put_compat_timespec(&t, interval)) | |
598 | return -EFAULT; | |
599 | return ret; | |
600 | } | |
601 | ||
602 | asmlinkage long | |
603 | sys32_rt_sigpending(compat_sigset_t __user *set, compat_size_t sigsetsize) | |
604 | { | |
605 | sigset_t s; | |
606 | compat_sigset_t s32; | |
607 | int ret; | |
608 | mm_segment_t old_fs = get_fs(); | |
609 | ||
610 | set_fs (KERNEL_DS); | |
ddb15ec1 | 611 | ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize); |
1da177e4 LT |
612 | set_fs (old_fs); |
613 | if (!ret) { | |
614 | switch (_NSIG_WORDS) { | |
615 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; | |
616 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; | |
617 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; | |
618 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; | |
619 | } | |
620 | if (copy_to_user (set, &s32, sizeof(compat_sigset_t))) | |
621 | return -EFAULT; | |
622 | } | |
623 | return ret; | |
624 | } | |
625 | ||
626 | asmlinkage long | |
627 | sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo) | |
628 | { | |
629 | siginfo_t info; | |
630 | int ret; | |
631 | mm_segment_t old_fs = get_fs(); | |
632 | ||
633 | if (copy_siginfo_from_user32(&info, uinfo)) | |
634 | return -EFAULT; | |
635 | set_fs (KERNEL_DS); | |
ddb15ec1 | 636 | ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info); |
1da177e4 LT |
637 | set_fs (old_fs); |
638 | return ret; | |
639 | } | |
640 | ||
641 | /* These are here just in case some old ia32 binary calls it. */ | |
642 | asmlinkage long | |
643 | sys32_pause(void) | |
644 | { | |
645 | current->state = TASK_INTERRUPTIBLE; | |
646 | schedule(); | |
647 | return -ERESTARTNOHAND; | |
648 | } | |
649 | ||
650 | ||
b89a8171 | 651 | #ifdef CONFIG_SYSCTL_SYSCALL |
1da177e4 LT |
652 | struct sysctl_ia32 { |
653 | unsigned int name; | |
654 | int nlen; | |
655 | unsigned int oldval; | |
656 | unsigned int oldlenp; | |
657 | unsigned int newval; | |
658 | unsigned int newlen; | |
659 | unsigned int __unused[4]; | |
660 | }; | |
661 | ||
662 | ||
663 | asmlinkage long | |
664 | sys32_sysctl(struct sysctl_ia32 __user *args32) | |
665 | { | |
666 | struct sysctl_ia32 a32; | |
667 | mm_segment_t old_fs = get_fs (); | |
668 | void __user *oldvalp, *newvalp; | |
669 | size_t oldlen; | |
670 | int __user *namep; | |
671 | long ret; | |
1da177e4 LT |
672 | |
673 | if (copy_from_user(&a32, args32, sizeof (a32))) | |
674 | return -EFAULT; | |
675 | ||
676 | /* | |
677 | * We need to pre-validate these because we have to disable address checking | |
678 | * before calling do_sysctl() because of OLDLEN but we can't run the risk of the | |
679 | * user specifying bad addresses here. Well, since we're dealing with 32 bit | |
680 | * addresses, we KNOW that access_ok() will always succeed, so this is an | |
681 | * expensive NOP, but so what... | |
682 | */ | |
683 | namep = compat_ptr(a32.name); | |
684 | oldvalp = compat_ptr(a32.oldval); | |
685 | newvalp = compat_ptr(a32.newval); | |
686 | ||
687 | if ((oldvalp && get_user(oldlen, (int __user *)compat_ptr(a32.oldlenp))) | |
688 | || !access_ok(VERIFY_WRITE, namep, 0) | |
689 | || !access_ok(VERIFY_WRITE, oldvalp, 0) | |
690 | || !access_ok(VERIFY_WRITE, newvalp, 0)) | |
691 | return -EFAULT; | |
692 | ||
693 | set_fs(KERNEL_DS); | |
694 | lock_kernel(); | |
ddb15ec1 AK |
695 | ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *)&oldlen, |
696 | newvalp, (size_t) a32.newlen); | |
1da177e4 LT |
697 | unlock_kernel(); |
698 | set_fs(old_fs); | |
699 | ||
700 | if (oldvalp && put_user (oldlen, (int __user *)compat_ptr(a32.oldlenp))) | |
701 | return -EFAULT; | |
702 | ||
703 | return ret; | |
704 | } | |
705 | #endif | |
706 | ||
707 | /* warning: next two assume little endian */ | |
708 | asmlinkage long | |
709 | sys32_pread(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi) | |
710 | { | |
711 | return sys_pread64(fd, ubuf, count, | |
712 | ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
713 | } | |
714 | ||
715 | asmlinkage long | |
716 | sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi) | |
717 | { | |
718 | return sys_pwrite64(fd, ubuf, count, | |
719 | ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
720 | } | |
721 | ||
722 | ||
723 | asmlinkage long | |
724 | sys32_personality(unsigned long personality) | |
725 | { | |
726 | int ret; | |
727 | if (personality(current->personality) == PER_LINUX32 && | |
728 | personality == PER_LINUX) | |
729 | personality = PER_LINUX32; | |
730 | ret = sys_personality(personality); | |
731 | if (ret == PER_LINUX32) | |
732 | ret = PER_LINUX; | |
733 | return ret; | |
734 | } | |
735 | ||
736 | asmlinkage long | |
737 | sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count) | |
738 | { | |
739 | mm_segment_t old_fs = get_fs(); | |
740 | int ret; | |
741 | off_t of; | |
742 | ||
743 | if (offset && get_user(of, offset)) | |
744 | return -EFAULT; | |
745 | ||
746 | set_fs(KERNEL_DS); | |
ddb15ec1 AK |
747 | ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, |
748 | count); | |
1da177e4 LT |
749 | set_fs(old_fs); |
750 | ||
83b942bd | 751 | if (offset && put_user(of, offset)) |
1da177e4 LT |
752 | return -EFAULT; |
753 | ||
754 | return ret; | |
755 | } | |
756 | ||
1da177e4 LT |
757 | asmlinkage long sys32_mmap2(unsigned long addr, unsigned long len, |
758 | unsigned long prot, unsigned long flags, | |
759 | unsigned long fd, unsigned long pgoff) | |
760 | { | |
761 | struct mm_struct *mm = current->mm; | |
762 | unsigned long error; | |
763 | struct file * file = NULL; | |
764 | ||
765 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
766 | if (!(flags & MAP_ANONYMOUS)) { | |
767 | file = fget(fd); | |
768 | if (!file) | |
769 | return -EBADF; | |
770 | } | |
771 | ||
772 | down_write(&mm->mmap_sem); | |
773 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
774 | up_write(&mm->mmap_sem); | |
775 | ||
776 | if (file) | |
777 | fput(file); | |
778 | return error; | |
779 | } | |
780 | ||
781 | asmlinkage long sys32_olduname(struct oldold_utsname __user * name) | |
782 | { | |
26c13f2b | 783 | int err; |
1da177e4 LT |
784 | |
785 | if (!name) | |
786 | return -EFAULT; | |
e9ff3990 | 787 | if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname))) |
1da177e4 LT |
788 | return -EFAULT; |
789 | ||
790 | down_read(&uts_sem); | |
e9ff3990 SH |
791 | |
792 | err = __copy_to_user(&name->sysname,&utsname()->sysname, | |
26c13f2b AK |
793 | __OLD_UTS_LEN); |
794 | err |= __put_user(0,name->sysname+__OLD_UTS_LEN); | |
e9ff3990 | 795 | err |= __copy_to_user(&name->nodename,&utsname()->nodename, |
26c13f2b AK |
796 | __OLD_UTS_LEN); |
797 | err |= __put_user(0,name->nodename+__OLD_UTS_LEN); | |
e9ff3990 | 798 | err |= __copy_to_user(&name->release,&utsname()->release, |
26c13f2b AK |
799 | __OLD_UTS_LEN); |
800 | err |= __put_user(0,name->release+__OLD_UTS_LEN); | |
e9ff3990 | 801 | err |= __copy_to_user(&name->version,&utsname()->version, |
26c13f2b AK |
802 | __OLD_UTS_LEN); |
803 | err |= __put_user(0,name->version+__OLD_UTS_LEN); | |
e9ff3990 SH |
804 | { |
805 | char *arch = "x86_64"; | |
806 | if (personality(current->personality) == PER_LINUX32) | |
807 | arch = "i686"; | |
1da177e4 | 808 | |
e9ff3990 SH |
809 | err |= __copy_to_user(&name->machine, arch, strlen(arch)+1); |
810 | } | |
811 | ||
812 | up_read(&uts_sem); | |
813 | ||
814 | err = err ? -EFAULT : 0; | |
815 | ||
816 | return err; | |
1da177e4 LT |
817 | } |
818 | ||
819 | long sys32_uname(struct old_utsname __user * name) | |
820 | { | |
821 | int err; | |
822 | if (!name) | |
823 | return -EFAULT; | |
824 | down_read(&uts_sem); | |
e9ff3990 | 825 | err = copy_to_user(name, utsname(), sizeof (*name)); |
1da177e4 LT |
826 | up_read(&uts_sem); |
827 | if (personality(current->personality) == PER_LINUX32) | |
828 | err |= copy_to_user(&name->machine, "i686", 5); | |
829 | return err?-EFAULT:0; | |
830 | } | |
831 | ||
832 | long sys32_ustat(unsigned dev, struct ustat32 __user *u32p) | |
833 | { | |
834 | struct ustat u; | |
835 | mm_segment_t seg; | |
836 | int ret; | |
837 | ||
838 | seg = get_fs(); | |
839 | set_fs(KERNEL_DS); | |
ddb15ec1 | 840 | ret = sys_ustat(dev, (struct ustat __user *)&u); |
1da177e4 LT |
841 | set_fs(seg); |
842 | if (ret >= 0) { | |
843 | if (!access_ok(VERIFY_WRITE,u32p,sizeof(struct ustat32)) || | |
844 | __put_user((__u32) u.f_tfree, &u32p->f_tfree) || | |
845 | __put_user((__u32) u.f_tinode, &u32p->f_tfree) || | |
846 | __copy_to_user(&u32p->f_fname, u.f_fname, sizeof(u.f_fname)) || | |
847 | __copy_to_user(&u32p->f_fpack, u.f_fpack, sizeof(u.f_fpack))) | |
848 | ret = -EFAULT; | |
849 | } | |
850 | return ret; | |
851 | } | |
852 | ||
853 | asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv, | |
854 | compat_uptr_t __user *envp, struct pt_regs *regs) | |
855 | { | |
856 | long error; | |
857 | char * filename; | |
858 | ||
859 | filename = getname(name); | |
860 | error = PTR_ERR(filename); | |
861 | if (IS_ERR(filename)) | |
862 | return error; | |
863 | error = compat_do_execve(filename, argv, envp, regs); | |
864 | if (error == 0) { | |
865 | task_lock(current); | |
866 | current->ptrace &= ~PT_DTRACE; | |
867 | task_unlock(current); | |
868 | } | |
869 | putname(filename); | |
870 | return error; | |
871 | } | |
872 | ||
873 | asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp, | |
874 | struct pt_regs *regs) | |
875 | { | |
876 | void __user *parent_tid = (void __user *)regs->rdx; | |
877 | void __user *child_tid = (void __user *)regs->rdi; | |
878 | if (!newsp) | |
879 | newsp = regs->rsp; | |
880 | return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid); | |
881 | } | |
882 | ||
883 | /* | |
884 | * Some system calls that need sign extended arguments. This could be done by a generic wrapper. | |
885 | */ | |
886 | ||
887 | long sys32_lseek (unsigned int fd, int offset, unsigned int whence) | |
888 | { | |
889 | return sys_lseek(fd, offset, whence); | |
890 | } | |
891 | ||
892 | long sys32_kill(int pid, int sig) | |
893 | { | |
894 | return sys_kill(pid, sig); | |
895 | } | |
896 | ||
1da177e4 LT |
897 | long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high, |
898 | __u32 len_low, __u32 len_high, int advice) | |
899 | { | |
900 | return sys_fadvise64_64(fd, | |
901 | (((u64)offset_high)<<32) | offset_low, | |
902 | (((u64)len_high)<<32) | len_low, | |
903 | advice); | |
904 | } | |
905 | ||
906 | long sys32_vm86_warning(void) | |
907 | { | |
908 | struct task_struct *me = current; | |
909 | static char lastcomm[sizeof(me->comm)]; | |
910 | if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) { | |
bebfa101 | 911 | compat_printk(KERN_INFO "%s: vm86 mode not supported on 64 bit kernel\n", |
1da177e4 LT |
912 | me->comm); |
913 | strncpy(lastcomm, me->comm, sizeof(lastcomm)); | |
914 | } | |
915 | return -ENOSYS; | |
916 | } | |
917 | ||
918 | long sys32_lookup_dcookie(u32 addr_low, u32 addr_high, | |
919 | char __user * buf, size_t len) | |
920 | { | |
921 | return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len); | |
922 | } | |
923 |