Commit | Line | Data |
---|---|---|
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 | { | |
afefdbb2 DH |
79 | compat_ino_t ino; |
80 | ||
1da177e4 LT |
81 | typeof(ubuf->st_uid) uid = 0; |
82 | typeof(ubuf->st_gid) gid = 0; | |
83 | SET_UID(uid, kbuf->uid); | |
84 | SET_GID(gid, kbuf->gid); | |
85 | if (!old_valid_dev(kbuf->dev) || !old_valid_dev(kbuf->rdev)) | |
86 | return -EOVERFLOW; | |
87 | if (kbuf->size >= 0x7fffffff) | |
88 | return -EOVERFLOW; | |
afefdbb2 DH |
89 | ino = kbuf->ino; |
90 | if (sizeof(ino) < sizeof(kbuf->ino) && ino != kbuf->ino) | |
91 | return -EOVERFLOW; | |
1da177e4 LT |
92 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct compat_stat)) || |
93 | __put_user (old_encode_dev(kbuf->dev), &ubuf->st_dev) || | |
afefdbb2 | 94 | __put_user (ino, &ubuf->st_ino) || |
1da177e4 LT |
95 | __put_user (kbuf->mode, &ubuf->st_mode) || |
96 | __put_user (kbuf->nlink, &ubuf->st_nlink) || | |
97 | __put_user (uid, &ubuf->st_uid) || | |
98 | __put_user (gid, &ubuf->st_gid) || | |
99 | __put_user (old_encode_dev(kbuf->rdev), &ubuf->st_rdev) || | |
100 | __put_user (kbuf->size, &ubuf->st_size) || | |
101 | __put_user (kbuf->atime.tv_sec, &ubuf->st_atime) || | |
102 | __put_user (kbuf->atime.tv_nsec, &ubuf->st_atime_nsec) || | |
103 | __put_user (kbuf->mtime.tv_sec, &ubuf->st_mtime) || | |
104 | __put_user (kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec) || | |
105 | __put_user (kbuf->ctime.tv_sec, &ubuf->st_ctime) || | |
106 | __put_user (kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec) || | |
107 | __put_user (kbuf->blksize, &ubuf->st_blksize) || | |
108 | __put_user (kbuf->blocks, &ubuf->st_blocks)) | |
109 | return -EFAULT; | |
110 | return 0; | |
111 | } | |
112 | ||
113 | asmlinkage long | |
114 | sys32_truncate64(char __user * filename, unsigned long offset_low, unsigned long offset_high) | |
115 | { | |
116 | return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low); | |
117 | } | |
118 | ||
119 | asmlinkage long | |
120 | sys32_ftruncate64(unsigned int fd, unsigned long offset_low, unsigned long offset_high) | |
121 | { | |
122 | return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low); | |
123 | } | |
124 | ||
125 | /* Another set for IA32/LFS -- x86_64 struct stat is different due to | |
126 | support for 64bit inode numbers. */ | |
127 | ||
128 | static int | |
129 | cp_stat64(struct stat64 __user *ubuf, struct kstat *stat) | |
130 | { | |
131 | typeof(ubuf->st_uid) uid = 0; | |
132 | typeof(ubuf->st_gid) gid = 0; | |
133 | SET_UID(uid, stat->uid); | |
134 | SET_GID(gid, stat->gid); | |
135 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) || | |
136 | __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) || | |
137 | __put_user (stat->ino, &ubuf->__st_ino) || | |
138 | __put_user (stat->ino, &ubuf->st_ino) || | |
139 | __put_user (stat->mode, &ubuf->st_mode) || | |
140 | __put_user (stat->nlink, &ubuf->st_nlink) || | |
141 | __put_user (uid, &ubuf->st_uid) || | |
142 | __put_user (gid, &ubuf->st_gid) || | |
143 | __put_user (huge_encode_dev(stat->rdev), &ubuf->st_rdev) || | |
144 | __put_user (stat->size, &ubuf->st_size) || | |
145 | __put_user (stat->atime.tv_sec, &ubuf->st_atime) || | |
146 | __put_user (stat->atime.tv_nsec, &ubuf->st_atime_nsec) || | |
147 | __put_user (stat->mtime.tv_sec, &ubuf->st_mtime) || | |
148 | __put_user (stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) || | |
149 | __put_user (stat->ctime.tv_sec, &ubuf->st_ctime) || | |
150 | __put_user (stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) || | |
151 | __put_user (stat->blksize, &ubuf->st_blksize) || | |
152 | __put_user (stat->blocks, &ubuf->st_blocks)) | |
153 | return -EFAULT; | |
154 | return 0; | |
155 | } | |
156 | ||
157 | asmlinkage long | |
158 | sys32_stat64(char __user * filename, struct stat64 __user *statbuf) | |
159 | { | |
160 | struct kstat stat; | |
161 | int ret = vfs_stat(filename, &stat); | |
162 | if (!ret) | |
163 | ret = cp_stat64(statbuf, &stat); | |
164 | return ret; | |
165 | } | |
166 | ||
167 | asmlinkage long | |
168 | sys32_lstat64(char __user * filename, struct stat64 __user *statbuf) | |
169 | { | |
170 | struct kstat stat; | |
171 | int ret = vfs_lstat(filename, &stat); | |
172 | if (!ret) | |
173 | ret = cp_stat64(statbuf, &stat); | |
174 | return ret; | |
175 | } | |
176 | ||
177 | asmlinkage long | |
178 | sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf) | |
179 | { | |
180 | struct kstat stat; | |
181 | int ret = vfs_fstat(fd, &stat); | |
182 | if (!ret) | |
183 | ret = cp_stat64(statbuf, &stat); | |
184 | return ret; | |
185 | } | |
186 | ||
cff2b760 UD |
187 | asmlinkage long |
188 | sys32_fstatat(unsigned int dfd, char __user *filename, | |
189 | struct stat64 __user* statbuf, int flag) | |
190 | { | |
191 | struct kstat stat; | |
192 | int error = -EINVAL; | |
193 | ||
194 | if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) | |
195 | goto out; | |
196 | ||
197 | if (flag & AT_SYMLINK_NOFOLLOW) | |
198 | error = vfs_lstat_fd(dfd, filename, &stat); | |
199 | else | |
200 | error = vfs_stat_fd(dfd, filename, &stat); | |
201 | ||
202 | if (!error) | |
203 | error = cp_stat64(statbuf, &stat); | |
204 | ||
205 | out: | |
206 | return error; | |
207 | } | |
208 | ||
1da177e4 LT |
209 | /* |
210 | * Linux/i386 didn't use to be able to handle more than | |
211 | * 4 system call parameters, so these system calls used a memory | |
212 | * block for parameter passing.. | |
213 | */ | |
214 | ||
215 | struct mmap_arg_struct { | |
216 | unsigned int addr; | |
217 | unsigned int len; | |
218 | unsigned int prot; | |
219 | unsigned int flags; | |
220 | unsigned int fd; | |
221 | unsigned int offset; | |
222 | }; | |
223 | ||
224 | asmlinkage long | |
225 | sys32_mmap(struct mmap_arg_struct __user *arg) | |
226 | { | |
227 | struct mmap_arg_struct a; | |
228 | struct file *file = NULL; | |
229 | unsigned long retval; | |
230 | struct mm_struct *mm ; | |
231 | ||
232 | if (copy_from_user(&a, arg, sizeof(a))) | |
233 | return -EFAULT; | |
234 | ||
235 | if (a.offset & ~PAGE_MASK) | |
236 | return -EINVAL; | |
237 | ||
238 | if (!(a.flags & MAP_ANONYMOUS)) { | |
239 | file = fget(a.fd); | |
240 | if (!file) | |
241 | return -EBADF; | |
242 | } | |
243 | ||
244 | mm = current->mm; | |
245 | down_write(&mm->mmap_sem); | |
246 | retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, a.offset>>PAGE_SHIFT); | |
247 | if (file) | |
248 | fput(file); | |
249 | ||
250 | up_write(&mm->mmap_sem); | |
251 | ||
252 | return retval; | |
253 | } | |
254 | ||
255 | asmlinkage long | |
256 | sys32_mprotect(unsigned long start, size_t len, unsigned long prot) | |
257 | { | |
258 | return sys_mprotect(start,len,prot); | |
259 | } | |
260 | ||
261 | asmlinkage long | |
262 | sys32_pipe(int __user *fd) | |
263 | { | |
264 | int retval; | |
265 | int fds[2]; | |
266 | ||
267 | retval = do_pipe(fds); | |
268 | if (retval) | |
269 | goto out; | |
270 | if (copy_to_user(fd, fds, sizeof(fds))) | |
271 | retval = -EFAULT; | |
272 | out: | |
273 | return retval; | |
274 | } | |
275 | ||
276 | asmlinkage long | |
277 | sys32_rt_sigaction(int sig, struct sigaction32 __user *act, | |
278 | struct sigaction32 __user *oact, unsigned int sigsetsize) | |
279 | { | |
280 | struct k_sigaction new_ka, old_ka; | |
281 | int ret; | |
282 | compat_sigset_t set32; | |
283 | ||
284 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
285 | if (sigsetsize != sizeof(compat_sigset_t)) | |
286 | return -EINVAL; | |
287 | ||
288 | if (act) { | |
289 | compat_uptr_t handler, restorer; | |
290 | ||
291 | if (!access_ok(VERIFY_READ, act, sizeof(*act)) || | |
292 | __get_user(handler, &act->sa_handler) || | |
293 | __get_user(new_ka.sa.sa_flags, &act->sa_flags) || | |
294 | __get_user(restorer, &act->sa_restorer)|| | |
295 | __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t))) | |
296 | return -EFAULT; | |
297 | new_ka.sa.sa_handler = compat_ptr(handler); | |
298 | new_ka.sa.sa_restorer = compat_ptr(restorer); | |
299 | /* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */ | |
300 | switch (_NSIG_WORDS) { | |
301 | case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | |
302 | | (((long)set32.sig[7]) << 32); | |
303 | case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | |
304 | | (((long)set32.sig[5]) << 32); | |
305 | case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | |
306 | | (((long)set32.sig[3]) << 32); | |
307 | case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | |
308 | | (((long)set32.sig[1]) << 32); | |
309 | } | |
310 | } | |
311 | ||
312 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); | |
313 | ||
314 | if (!ret && oact) { | |
315 | /* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */ | |
316 | switch (_NSIG_WORDS) { | |
317 | case 4: | |
318 | set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); | |
319 | set32.sig[6] = old_ka.sa.sa_mask.sig[3]; | |
320 | case 3: | |
321 | set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); | |
322 | set32.sig[4] = old_ka.sa.sa_mask.sig[2]; | |
323 | case 2: | |
324 | set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); | |
325 | set32.sig[2] = old_ka.sa.sa_mask.sig[1]; | |
326 | case 1: | |
327 | set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); | |
328 | set32.sig[0] = old_ka.sa.sa_mask.sig[0]; | |
329 | } | |
330 | if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || | |
331 | __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) || | |
332 | __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) || | |
333 | __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || | |
334 | __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t))) | |
335 | return -EFAULT; | |
336 | } | |
337 | ||
338 | return ret; | |
339 | } | |
340 | ||
341 | asmlinkage long | |
342 | sys32_sigaction (int sig, struct old_sigaction32 __user *act, struct old_sigaction32 __user *oact) | |
343 | { | |
344 | struct k_sigaction new_ka, old_ka; | |
345 | int ret; | |
346 | ||
347 | if (act) { | |
348 | compat_old_sigset_t mask; | |
349 | compat_uptr_t handler, restorer; | |
350 | ||
351 | if (!access_ok(VERIFY_READ, act, sizeof(*act)) || | |
352 | __get_user(handler, &act->sa_handler) || | |
353 | __get_user(new_ka.sa.sa_flags, &act->sa_flags) || | |
354 | __get_user(restorer, &act->sa_restorer) || | |
355 | __get_user(mask, &act->sa_mask)) | |
356 | return -EFAULT; | |
357 | ||
358 | new_ka.sa.sa_handler = compat_ptr(handler); | |
359 | new_ka.sa.sa_restorer = compat_ptr(restorer); | |
360 | ||
361 | siginitset(&new_ka.sa.sa_mask, mask); | |
362 | } | |
363 | ||
364 | ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); | |
365 | ||
366 | if (!ret && oact) { | |
367 | if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || | |
368 | __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) || | |
369 | __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) || | |
370 | __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || | |
371 | __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) | |
372 | return -EFAULT; | |
373 | } | |
374 | ||
375 | return ret; | |
376 | } | |
377 | ||
378 | asmlinkage long | |
379 | sys32_rt_sigprocmask(int how, compat_sigset_t __user *set, | |
380 | compat_sigset_t __user *oset, unsigned int sigsetsize) | |
381 | { | |
382 | sigset_t s; | |
383 | compat_sigset_t s32; | |
384 | int ret; | |
385 | mm_segment_t old_fs = get_fs(); | |
386 | ||
387 | if (set) { | |
388 | if (copy_from_user (&s32, set, sizeof(compat_sigset_t))) | |
389 | return -EFAULT; | |
390 | switch (_NSIG_WORDS) { | |
391 | case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32); | |
392 | case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32); | |
393 | case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32); | |
394 | case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32); | |
395 | } | |
396 | } | |
397 | set_fs (KERNEL_DS); | |
ddb15ec1 AK |
398 | ret = sys_rt_sigprocmask(how, |
399 | set ? (sigset_t __user *)&s : NULL, | |
400 | oset ? (sigset_t __user *)&s : NULL, | |
1da177e4 LT |
401 | sigsetsize); |
402 | set_fs (old_fs); | |
403 | if (ret) return ret; | |
404 | if (oset) { | |
405 | switch (_NSIG_WORDS) { | |
406 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; | |
407 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; | |
408 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; | |
409 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; | |
410 | } | |
411 | if (copy_to_user (oset, &s32, sizeof(compat_sigset_t))) | |
412 | return -EFAULT; | |
413 | } | |
414 | return 0; | |
415 | } | |
416 | ||
417 | static inline long | |
418 | get_tv32(struct timeval *o, struct compat_timeval __user *i) | |
419 | { | |
420 | int err = -EFAULT; | |
421 | if (access_ok(VERIFY_READ, i, sizeof(*i))) { | |
422 | err = __get_user(o->tv_sec, &i->tv_sec); | |
423 | err |= __get_user(o->tv_usec, &i->tv_usec); | |
424 | } | |
425 | return err; | |
426 | } | |
427 | ||
428 | static inline long | |
429 | put_tv32(struct compat_timeval __user *o, struct timeval *i) | |
430 | { | |
431 | int err = -EFAULT; | |
432 | if (access_ok(VERIFY_WRITE, o, sizeof(*o))) { | |
433 | err = __put_user(i->tv_sec, &o->tv_sec); | |
434 | err |= __put_user(i->tv_usec, &o->tv_usec); | |
435 | } | |
436 | return err; | |
437 | } | |
438 | ||
c08b8a49 | 439 | extern unsigned int alarm_setitimer(unsigned int seconds); |
1da177e4 LT |
440 | |
441 | asmlinkage long | |
442 | sys32_alarm(unsigned int seconds) | |
443 | { | |
c08b8a49 | 444 | return alarm_setitimer(seconds); |
1da177e4 LT |
445 | } |
446 | ||
447 | /* Translations due to time_t size differences. Which affects all | |
448 | sorts of things, like timeval and itimerval. */ | |
449 | ||
450 | extern struct timezone sys_tz; | |
451 | ||
452 | asmlinkage long | |
453 | sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) | |
454 | { | |
455 | if (tv) { | |
456 | struct timeval ktv; | |
457 | do_gettimeofday(&ktv); | |
458 | if (put_tv32(tv, &ktv)) | |
459 | return -EFAULT; | |
460 | } | |
461 | if (tz) { | |
462 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) | |
463 | return -EFAULT; | |
464 | } | |
465 | return 0; | |
466 | } | |
467 | ||
468 | asmlinkage long | |
469 | sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) | |
470 | { | |
471 | struct timeval ktv; | |
472 | struct timespec kts; | |
473 | struct timezone ktz; | |
474 | ||
475 | if (tv) { | |
476 | if (get_tv32(&ktv, tv)) | |
477 | return -EFAULT; | |
478 | kts.tv_sec = ktv.tv_sec; | |
479 | kts.tv_nsec = ktv.tv_usec * NSEC_PER_USEC; | |
480 | } | |
481 | if (tz) { | |
482 | if (copy_from_user(&ktz, tz, sizeof(ktz))) | |
483 | return -EFAULT; | |
484 | } | |
485 | ||
486 | return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); | |
487 | } | |
488 | ||
489 | struct sel_arg_struct { | |
490 | unsigned int n; | |
491 | unsigned int inp; | |
492 | unsigned int outp; | |
493 | unsigned int exp; | |
494 | unsigned int tvp; | |
495 | }; | |
496 | ||
497 | asmlinkage long | |
498 | sys32_old_select(struct sel_arg_struct __user *arg) | |
499 | { | |
500 | struct sel_arg_struct a; | |
501 | ||
502 | if (copy_from_user(&a, arg, sizeof(a))) | |
503 | return -EFAULT; | |
504 | return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp), | |
505 | compat_ptr(a.exp), compat_ptr(a.tvp)); | |
506 | } | |
507 | ||
508 | extern asmlinkage long | |
509 | compat_sys_wait4(compat_pid_t pid, compat_uint_t * stat_addr, int options, | |
510 | struct compat_rusage *ru); | |
511 | ||
512 | asmlinkage long | |
513 | sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options) | |
514 | { | |
515 | return compat_sys_wait4(pid, stat_addr, options, NULL); | |
516 | } | |
517 | ||
1da177e4 LT |
518 | /* 32-bit timeval and related flotsam. */ |
519 | ||
520 | asmlinkage long | |
521 | sys32_sysfs(int option, u32 arg1, u32 arg2) | |
522 | { | |
523 | return sys_sysfs(option, arg1, arg2); | |
524 | } | |
525 | ||
526 | struct sysinfo32 { | |
527 | s32 uptime; | |
528 | u32 loads[3]; | |
529 | u32 totalram; | |
530 | u32 freeram; | |
531 | u32 sharedram; | |
532 | u32 bufferram; | |
533 | u32 totalswap; | |
534 | u32 freeswap; | |
535 | unsigned short procs; | |
536 | unsigned short pad; | |
537 | u32 totalhigh; | |
538 | u32 freehigh; | |
539 | u32 mem_unit; | |
540 | char _f[20-2*sizeof(u32)-sizeof(int)]; | |
541 | }; | |
542 | ||
543 | asmlinkage long | |
544 | sys32_sysinfo(struct sysinfo32 __user *info) | |
545 | { | |
546 | struct sysinfo s; | |
547 | int ret; | |
548 | mm_segment_t old_fs = get_fs (); | |
549 | int bitcount = 0; | |
550 | ||
551 | set_fs (KERNEL_DS); | |
ddb15ec1 | 552 | ret = sys_sysinfo((struct sysinfo __user *)&s); |
1da177e4 LT |
553 | set_fs (old_fs); |
554 | ||
555 | /* Check to see if any memory value is too large for 32-bit and scale | |
556 | * down if needed | |
557 | */ | |
558 | if ((s.totalram >> 32) || (s.totalswap >> 32)) { | |
559 | while (s.mem_unit < PAGE_SIZE) { | |
560 | s.mem_unit <<= 1; | |
561 | bitcount++; | |
562 | } | |
563 | s.totalram >>= bitcount; | |
564 | s.freeram >>= bitcount; | |
565 | s.sharedram >>= bitcount; | |
566 | s.bufferram >>= bitcount; | |
567 | s.totalswap >>= bitcount; | |
568 | s.freeswap >>= bitcount; | |
569 | s.totalhigh >>= bitcount; | |
570 | s.freehigh >>= bitcount; | |
571 | } | |
572 | ||
573 | if (!access_ok(VERIFY_WRITE, info, sizeof(struct sysinfo32)) || | |
574 | __put_user (s.uptime, &info->uptime) || | |
575 | __put_user (s.loads[0], &info->loads[0]) || | |
576 | __put_user (s.loads[1], &info->loads[1]) || | |
577 | __put_user (s.loads[2], &info->loads[2]) || | |
578 | __put_user (s.totalram, &info->totalram) || | |
579 | __put_user (s.freeram, &info->freeram) || | |
580 | __put_user (s.sharedram, &info->sharedram) || | |
581 | __put_user (s.bufferram, &info->bufferram) || | |
582 | __put_user (s.totalswap, &info->totalswap) || | |
583 | __put_user (s.freeswap, &info->freeswap) || | |
584 | __put_user (s.procs, &info->procs) || | |
585 | __put_user (s.totalhigh, &info->totalhigh) || | |
586 | __put_user (s.freehigh, &info->freehigh) || | |
587 | __put_user (s.mem_unit, &info->mem_unit)) | |
588 | return -EFAULT; | |
589 | return 0; | |
590 | } | |
591 | ||
592 | asmlinkage long | |
593 | sys32_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval) | |
594 | { | |
595 | struct timespec t; | |
596 | int ret; | |
597 | mm_segment_t old_fs = get_fs (); | |
598 | ||
599 | set_fs (KERNEL_DS); | |
ddb15ec1 | 600 | ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t); |
1da177e4 LT |
601 | set_fs (old_fs); |
602 | if (put_compat_timespec(&t, interval)) | |
603 | return -EFAULT; | |
604 | return ret; | |
605 | } | |
606 | ||
607 | asmlinkage long | |
608 | sys32_rt_sigpending(compat_sigset_t __user *set, compat_size_t sigsetsize) | |
609 | { | |
610 | sigset_t s; | |
611 | compat_sigset_t s32; | |
612 | int ret; | |
613 | mm_segment_t old_fs = get_fs(); | |
614 | ||
615 | set_fs (KERNEL_DS); | |
ddb15ec1 | 616 | ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize); |
1da177e4 LT |
617 | set_fs (old_fs); |
618 | if (!ret) { | |
619 | switch (_NSIG_WORDS) { | |
620 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; | |
621 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; | |
622 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; | |
623 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; | |
624 | } | |
625 | if (copy_to_user (set, &s32, sizeof(compat_sigset_t))) | |
626 | return -EFAULT; | |
627 | } | |
628 | return ret; | |
629 | } | |
630 | ||
631 | asmlinkage long | |
632 | sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo) | |
633 | { | |
634 | siginfo_t info; | |
635 | int ret; | |
636 | mm_segment_t old_fs = get_fs(); | |
637 | ||
638 | if (copy_siginfo_from_user32(&info, uinfo)) | |
639 | return -EFAULT; | |
640 | set_fs (KERNEL_DS); | |
ddb15ec1 | 641 | ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info); |
1da177e4 LT |
642 | set_fs (old_fs); |
643 | return ret; | |
644 | } | |
645 | ||
646 | /* These are here just in case some old ia32 binary calls it. */ | |
647 | asmlinkage long | |
648 | sys32_pause(void) | |
649 | { | |
650 | current->state = TASK_INTERRUPTIBLE; | |
651 | schedule(); | |
652 | return -ERESTARTNOHAND; | |
653 | } | |
654 | ||
655 | ||
b89a8171 | 656 | #ifdef CONFIG_SYSCTL_SYSCALL |
1da177e4 LT |
657 | struct sysctl_ia32 { |
658 | unsigned int name; | |
659 | int nlen; | |
660 | unsigned int oldval; | |
661 | unsigned int oldlenp; | |
662 | unsigned int newval; | |
663 | unsigned int newlen; | |
664 | unsigned int __unused[4]; | |
665 | }; | |
666 | ||
667 | ||
668 | asmlinkage long | |
669 | sys32_sysctl(struct sysctl_ia32 __user *args32) | |
670 | { | |
671 | struct sysctl_ia32 a32; | |
672 | mm_segment_t old_fs = get_fs (); | |
673 | void __user *oldvalp, *newvalp; | |
674 | size_t oldlen; | |
675 | int __user *namep; | |
676 | long ret; | |
1da177e4 LT |
677 | |
678 | if (copy_from_user(&a32, args32, sizeof (a32))) | |
679 | return -EFAULT; | |
680 | ||
681 | /* | |
682 | * We need to pre-validate these because we have to disable address checking | |
683 | * before calling do_sysctl() because of OLDLEN but we can't run the risk of the | |
684 | * user specifying bad addresses here. Well, since we're dealing with 32 bit | |
685 | * addresses, we KNOW that access_ok() will always succeed, so this is an | |
686 | * expensive NOP, but so what... | |
687 | */ | |
688 | namep = compat_ptr(a32.name); | |
689 | oldvalp = compat_ptr(a32.oldval); | |
690 | newvalp = compat_ptr(a32.newval); | |
691 | ||
692 | if ((oldvalp && get_user(oldlen, (int __user *)compat_ptr(a32.oldlenp))) | |
693 | || !access_ok(VERIFY_WRITE, namep, 0) | |
694 | || !access_ok(VERIFY_WRITE, oldvalp, 0) | |
695 | || !access_ok(VERIFY_WRITE, newvalp, 0)) | |
696 | return -EFAULT; | |
697 | ||
698 | set_fs(KERNEL_DS); | |
699 | lock_kernel(); | |
ddb15ec1 AK |
700 | ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *)&oldlen, |
701 | newvalp, (size_t) a32.newlen); | |
1da177e4 LT |
702 | unlock_kernel(); |
703 | set_fs(old_fs); | |
704 | ||
705 | if (oldvalp && put_user (oldlen, (int __user *)compat_ptr(a32.oldlenp))) | |
706 | return -EFAULT; | |
707 | ||
708 | return ret; | |
709 | } | |
710 | #endif | |
711 | ||
712 | /* warning: next two assume little endian */ | |
713 | asmlinkage long | |
714 | sys32_pread(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi) | |
715 | { | |
716 | return sys_pread64(fd, ubuf, count, | |
717 | ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
718 | } | |
719 | ||
720 | asmlinkage long | |
721 | sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi) | |
722 | { | |
723 | return sys_pwrite64(fd, ubuf, count, | |
724 | ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
725 | } | |
726 | ||
727 | ||
728 | asmlinkage long | |
729 | sys32_personality(unsigned long personality) | |
730 | { | |
731 | int ret; | |
732 | if (personality(current->personality) == PER_LINUX32 && | |
733 | personality == PER_LINUX) | |
734 | personality = PER_LINUX32; | |
735 | ret = sys_personality(personality); | |
736 | if (ret == PER_LINUX32) | |
737 | ret = PER_LINUX; | |
738 | return ret; | |
739 | } | |
740 | ||
741 | asmlinkage long | |
742 | sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count) | |
743 | { | |
744 | mm_segment_t old_fs = get_fs(); | |
745 | int ret; | |
746 | off_t of; | |
747 | ||
748 | if (offset && get_user(of, offset)) | |
749 | return -EFAULT; | |
750 | ||
751 | set_fs(KERNEL_DS); | |
ddb15ec1 AK |
752 | ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, |
753 | count); | |
1da177e4 LT |
754 | set_fs(old_fs); |
755 | ||
83b942bd | 756 | if (offset && put_user(of, offset)) |
1da177e4 LT |
757 | return -EFAULT; |
758 | ||
759 | return ret; | |
760 | } | |
761 | ||
1da177e4 LT |
762 | asmlinkage long sys32_mmap2(unsigned long addr, unsigned long len, |
763 | unsigned long prot, unsigned long flags, | |
764 | unsigned long fd, unsigned long pgoff) | |
765 | { | |
766 | struct mm_struct *mm = current->mm; | |
767 | unsigned long error; | |
768 | struct file * file = NULL; | |
769 | ||
770 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
771 | if (!(flags & MAP_ANONYMOUS)) { | |
772 | file = fget(fd); | |
773 | if (!file) | |
774 | return -EBADF; | |
775 | } | |
776 | ||
777 | down_write(&mm->mmap_sem); | |
778 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
779 | up_write(&mm->mmap_sem); | |
780 | ||
781 | if (file) | |
782 | fput(file); | |
783 | return error; | |
784 | } | |
785 | ||
786 | asmlinkage long sys32_olduname(struct oldold_utsname __user * name) | |
787 | { | |
26c13f2b | 788 | int err; |
1da177e4 LT |
789 | |
790 | if (!name) | |
791 | return -EFAULT; | |
e9ff3990 | 792 | if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname))) |
1da177e4 LT |
793 | return -EFAULT; |
794 | ||
795 | down_read(&uts_sem); | |
e9ff3990 SH |
796 | |
797 | err = __copy_to_user(&name->sysname,&utsname()->sysname, | |
26c13f2b AK |
798 | __OLD_UTS_LEN); |
799 | err |= __put_user(0,name->sysname+__OLD_UTS_LEN); | |
e9ff3990 | 800 | err |= __copy_to_user(&name->nodename,&utsname()->nodename, |
26c13f2b AK |
801 | __OLD_UTS_LEN); |
802 | err |= __put_user(0,name->nodename+__OLD_UTS_LEN); | |
e9ff3990 | 803 | err |= __copy_to_user(&name->release,&utsname()->release, |
26c13f2b AK |
804 | __OLD_UTS_LEN); |
805 | err |= __put_user(0,name->release+__OLD_UTS_LEN); | |
e9ff3990 | 806 | err |= __copy_to_user(&name->version,&utsname()->version, |
26c13f2b AK |
807 | __OLD_UTS_LEN); |
808 | err |= __put_user(0,name->version+__OLD_UTS_LEN); | |
e9ff3990 SH |
809 | { |
810 | char *arch = "x86_64"; | |
811 | if (personality(current->personality) == PER_LINUX32) | |
812 | arch = "i686"; | |
1da177e4 | 813 | |
e9ff3990 SH |
814 | err |= __copy_to_user(&name->machine, arch, strlen(arch)+1); |
815 | } | |
816 | ||
817 | up_read(&uts_sem); | |
818 | ||
819 | err = err ? -EFAULT : 0; | |
820 | ||
821 | return err; | |
1da177e4 LT |
822 | } |
823 | ||
824 | long sys32_uname(struct old_utsname __user * name) | |
825 | { | |
826 | int err; | |
827 | if (!name) | |
828 | return -EFAULT; | |
829 | down_read(&uts_sem); | |
e9ff3990 | 830 | err = copy_to_user(name, utsname(), sizeof (*name)); |
1da177e4 LT |
831 | up_read(&uts_sem); |
832 | if (personality(current->personality) == PER_LINUX32) | |
833 | err |= copy_to_user(&name->machine, "i686", 5); | |
834 | return err?-EFAULT:0; | |
835 | } | |
836 | ||
837 | long sys32_ustat(unsigned dev, struct ustat32 __user *u32p) | |
838 | { | |
839 | struct ustat u; | |
840 | mm_segment_t seg; | |
841 | int ret; | |
842 | ||
843 | seg = get_fs(); | |
844 | set_fs(KERNEL_DS); | |
ddb15ec1 | 845 | ret = sys_ustat(dev, (struct ustat __user *)&u); |
1da177e4 LT |
846 | set_fs(seg); |
847 | if (ret >= 0) { | |
848 | if (!access_ok(VERIFY_WRITE,u32p,sizeof(struct ustat32)) || | |
849 | __put_user((__u32) u.f_tfree, &u32p->f_tfree) || | |
850 | __put_user((__u32) u.f_tinode, &u32p->f_tfree) || | |
851 | __copy_to_user(&u32p->f_fname, u.f_fname, sizeof(u.f_fname)) || | |
852 | __copy_to_user(&u32p->f_fpack, u.f_fpack, sizeof(u.f_fpack))) | |
853 | ret = -EFAULT; | |
854 | } | |
855 | return ret; | |
856 | } | |
857 | ||
858 | asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv, | |
859 | compat_uptr_t __user *envp, struct pt_regs *regs) | |
860 | { | |
861 | long error; | |
862 | char * filename; | |
863 | ||
864 | filename = getname(name); | |
865 | error = PTR_ERR(filename); | |
866 | if (IS_ERR(filename)) | |
867 | return error; | |
868 | error = compat_do_execve(filename, argv, envp, regs); | |
869 | if (error == 0) { | |
870 | task_lock(current); | |
871 | current->ptrace &= ~PT_DTRACE; | |
872 | task_unlock(current); | |
873 | } | |
874 | putname(filename); | |
875 | return error; | |
876 | } | |
877 | ||
878 | asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp, | |
879 | struct pt_regs *regs) | |
880 | { | |
881 | void __user *parent_tid = (void __user *)regs->rdx; | |
882 | void __user *child_tid = (void __user *)regs->rdi; | |
883 | if (!newsp) | |
884 | newsp = regs->rsp; | |
885 | return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid); | |
886 | } | |
887 | ||
888 | /* | |
889 | * Some system calls that need sign extended arguments. This could be done by a generic wrapper. | |
890 | */ | |
891 | ||
892 | long sys32_lseek (unsigned int fd, int offset, unsigned int whence) | |
893 | { | |
894 | return sys_lseek(fd, offset, whence); | |
895 | } | |
896 | ||
897 | long sys32_kill(int pid, int sig) | |
898 | { | |
899 | return sys_kill(pid, sig); | |
900 | } | |
901 | ||
1da177e4 LT |
902 | long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high, |
903 | __u32 len_low, __u32 len_high, int advice) | |
904 | { | |
905 | return sys_fadvise64_64(fd, | |
906 | (((u64)offset_high)<<32) | offset_low, | |
907 | (((u64)len_high)<<32) | len_low, | |
908 | advice); | |
909 | } | |
910 | ||
911 | long sys32_vm86_warning(void) | |
912 | { | |
913 | struct task_struct *me = current; | |
914 | static char lastcomm[sizeof(me->comm)]; | |
915 | if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) { | |
bebfa101 | 916 | compat_printk(KERN_INFO "%s: vm86 mode not supported on 64 bit kernel\n", |
1da177e4 LT |
917 | me->comm); |
918 | strncpy(lastcomm, me->comm, sizeof(lastcomm)); | |
919 | } | |
920 | return -ENOSYS; | |
921 | } | |
922 | ||
923 | long sys32_lookup_dcookie(u32 addr_low, u32 addr_high, | |
924 | char __user * buf, size_t len) | |
925 | { | |
926 | return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len); | |
927 | } | |
928 |