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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 | ||
23 | #include <linux/config.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/sched.h> | |
26 | #include <linux/fs.h> | |
27 | #include <linux/file.h> | |
28 | #include <linux/signal.h> | |
29 | #include <linux/syscalls.h> | |
30 | #include <linux/resource.h> | |
31 | #include <linux/times.h> | |
32 | #include <linux/utsname.h> | |
1da177e4 LT |
33 | #include <linux/smp.h> |
34 | #include <linux/smp_lock.h> | |
35 | #include <linux/sem.h> | |
36 | #include <linux/msg.h> | |
37 | #include <linux/mm.h> | |
38 | #include <linux/shm.h> | |
39 | #include <linux/slab.h> | |
40 | #include <linux/uio.h> | |
41 | #include <linux/nfs_fs.h> | |
42 | #include <linux/quota.h> | |
43 | #include <linux/module.h> | |
44 | #include <linux/sunrpc/svc.h> | |
45 | #include <linux/nfsd/nfsd.h> | |
46 | #include <linux/nfsd/cache.h> | |
47 | #include <linux/nfsd/xdr.h> | |
48 | #include <linux/nfsd/syscall.h> | |
49 | #include <linux/poll.h> | |
50 | #include <linux/personality.h> | |
51 | #include <linux/stat.h> | |
52 | #include <linux/ipc.h> | |
53 | #include <linux/rwsem.h> | |
54 | #include <linux/binfmts.h> | |
55 | #include <linux/init.h> | |
56 | #include <linux/aio_abi.h> | |
57 | #include <linux/aio.h> | |
58 | #include <linux/compat.h> | |
59 | #include <linux/vfs.h> | |
60 | #include <linux/ptrace.h> | |
61 | #include <linux/highuid.h> | |
62 | #include <linux/vmalloc.h> | |
9e566d8b | 63 | #include <linux/fsnotify.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); | |
393 | ret = sys_rt_sigprocmask(how, set ? &s : NULL, oset ? &s : NULL, | |
394 | sigsetsize); | |
395 | set_fs (old_fs); | |
396 | if (ret) return ret; | |
397 | if (oset) { | |
398 | switch (_NSIG_WORDS) { | |
399 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; | |
400 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; | |
401 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; | |
402 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; | |
403 | } | |
404 | if (copy_to_user (oset, &s32, sizeof(compat_sigset_t))) | |
405 | return -EFAULT; | |
406 | } | |
407 | return 0; | |
408 | } | |
409 | ||
410 | static inline long | |
411 | get_tv32(struct timeval *o, struct compat_timeval __user *i) | |
412 | { | |
413 | int err = -EFAULT; | |
414 | if (access_ok(VERIFY_READ, i, sizeof(*i))) { | |
415 | err = __get_user(o->tv_sec, &i->tv_sec); | |
416 | err |= __get_user(o->tv_usec, &i->tv_usec); | |
417 | } | |
418 | return err; | |
419 | } | |
420 | ||
421 | static inline long | |
422 | put_tv32(struct compat_timeval __user *o, struct timeval *i) | |
423 | { | |
424 | int err = -EFAULT; | |
425 | if (access_ok(VERIFY_WRITE, o, sizeof(*o))) { | |
426 | err = __put_user(i->tv_sec, &o->tv_sec); | |
427 | err |= __put_user(i->tv_usec, &o->tv_usec); | |
428 | } | |
429 | return err; | |
430 | } | |
431 | ||
c08b8a49 | 432 | extern unsigned int alarm_setitimer(unsigned int seconds); |
1da177e4 LT |
433 | |
434 | asmlinkage long | |
435 | sys32_alarm(unsigned int seconds) | |
436 | { | |
c08b8a49 | 437 | return alarm_setitimer(seconds); |
1da177e4 LT |
438 | } |
439 | ||
440 | /* Translations due to time_t size differences. Which affects all | |
441 | sorts of things, like timeval and itimerval. */ | |
442 | ||
443 | extern struct timezone sys_tz; | |
444 | ||
445 | asmlinkage long | |
446 | sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) | |
447 | { | |
448 | if (tv) { | |
449 | struct timeval ktv; | |
450 | do_gettimeofday(&ktv); | |
451 | if (put_tv32(tv, &ktv)) | |
452 | return -EFAULT; | |
453 | } | |
454 | if (tz) { | |
455 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) | |
456 | return -EFAULT; | |
457 | } | |
458 | return 0; | |
459 | } | |
460 | ||
461 | asmlinkage long | |
462 | sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) | |
463 | { | |
464 | struct timeval ktv; | |
465 | struct timespec kts; | |
466 | struct timezone ktz; | |
467 | ||
468 | if (tv) { | |
469 | if (get_tv32(&ktv, tv)) | |
470 | return -EFAULT; | |
471 | kts.tv_sec = ktv.tv_sec; | |
472 | kts.tv_nsec = ktv.tv_usec * NSEC_PER_USEC; | |
473 | } | |
474 | if (tz) { | |
475 | if (copy_from_user(&ktz, tz, sizeof(ktz))) | |
476 | return -EFAULT; | |
477 | } | |
478 | ||
479 | return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); | |
480 | } | |
481 | ||
482 | struct sel_arg_struct { | |
483 | unsigned int n; | |
484 | unsigned int inp; | |
485 | unsigned int outp; | |
486 | unsigned int exp; | |
487 | unsigned int tvp; | |
488 | }; | |
489 | ||
490 | asmlinkage long | |
491 | sys32_old_select(struct sel_arg_struct __user *arg) | |
492 | { | |
493 | struct sel_arg_struct a; | |
494 | ||
495 | if (copy_from_user(&a, arg, sizeof(a))) | |
496 | return -EFAULT; | |
497 | return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp), | |
498 | compat_ptr(a.exp), compat_ptr(a.tvp)); | |
499 | } | |
500 | ||
501 | extern asmlinkage long | |
502 | compat_sys_wait4(compat_pid_t pid, compat_uint_t * stat_addr, int options, | |
503 | struct compat_rusage *ru); | |
504 | ||
505 | asmlinkage long | |
506 | sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options) | |
507 | { | |
508 | return compat_sys_wait4(pid, stat_addr, options, NULL); | |
509 | } | |
510 | ||
511 | int sys32_ni_syscall(int call) | |
512 | { | |
513 | struct task_struct *me = current; | |
514 | static char lastcomm[sizeof(me->comm)]; | |
515 | ||
516 | if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) { | |
bebfa101 | 517 | compat_printk(KERN_INFO "IA32 syscall %d from %s not implemented\n", |
1da177e4 LT |
518 | call, me->comm); |
519 | strncpy(lastcomm, me->comm, sizeof(lastcomm)); | |
520 | } | |
521 | return -ENOSYS; | |
522 | } | |
523 | ||
524 | /* 32-bit timeval and related flotsam. */ | |
525 | ||
526 | asmlinkage long | |
527 | sys32_sysfs(int option, u32 arg1, u32 arg2) | |
528 | { | |
529 | return sys_sysfs(option, arg1, arg2); | |
530 | } | |
531 | ||
532 | struct sysinfo32 { | |
533 | s32 uptime; | |
534 | u32 loads[3]; | |
535 | u32 totalram; | |
536 | u32 freeram; | |
537 | u32 sharedram; | |
538 | u32 bufferram; | |
539 | u32 totalswap; | |
540 | u32 freeswap; | |
541 | unsigned short procs; | |
542 | unsigned short pad; | |
543 | u32 totalhigh; | |
544 | u32 freehigh; | |
545 | u32 mem_unit; | |
546 | char _f[20-2*sizeof(u32)-sizeof(int)]; | |
547 | }; | |
548 | ||
549 | asmlinkage long | |
550 | sys32_sysinfo(struct sysinfo32 __user *info) | |
551 | { | |
552 | struct sysinfo s; | |
553 | int ret; | |
554 | mm_segment_t old_fs = get_fs (); | |
555 | int bitcount = 0; | |
556 | ||
557 | set_fs (KERNEL_DS); | |
558 | ret = sys_sysinfo(&s); | |
559 | set_fs (old_fs); | |
560 | ||
561 | /* Check to see if any memory value is too large for 32-bit and scale | |
562 | * down if needed | |
563 | */ | |
564 | if ((s.totalram >> 32) || (s.totalswap >> 32)) { | |
565 | while (s.mem_unit < PAGE_SIZE) { | |
566 | s.mem_unit <<= 1; | |
567 | bitcount++; | |
568 | } | |
569 | s.totalram >>= bitcount; | |
570 | s.freeram >>= bitcount; | |
571 | s.sharedram >>= bitcount; | |
572 | s.bufferram >>= bitcount; | |
573 | s.totalswap >>= bitcount; | |
574 | s.freeswap >>= bitcount; | |
575 | s.totalhigh >>= bitcount; | |
576 | s.freehigh >>= bitcount; | |
577 | } | |
578 | ||
579 | if (!access_ok(VERIFY_WRITE, info, sizeof(struct sysinfo32)) || | |
580 | __put_user (s.uptime, &info->uptime) || | |
581 | __put_user (s.loads[0], &info->loads[0]) || | |
582 | __put_user (s.loads[1], &info->loads[1]) || | |
583 | __put_user (s.loads[2], &info->loads[2]) || | |
584 | __put_user (s.totalram, &info->totalram) || | |
585 | __put_user (s.freeram, &info->freeram) || | |
586 | __put_user (s.sharedram, &info->sharedram) || | |
587 | __put_user (s.bufferram, &info->bufferram) || | |
588 | __put_user (s.totalswap, &info->totalswap) || | |
589 | __put_user (s.freeswap, &info->freeswap) || | |
590 | __put_user (s.procs, &info->procs) || | |
591 | __put_user (s.totalhigh, &info->totalhigh) || | |
592 | __put_user (s.freehigh, &info->freehigh) || | |
593 | __put_user (s.mem_unit, &info->mem_unit)) | |
594 | return -EFAULT; | |
595 | return 0; | |
596 | } | |
597 | ||
598 | asmlinkage long | |
599 | sys32_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval) | |
600 | { | |
601 | struct timespec t; | |
602 | int ret; | |
603 | mm_segment_t old_fs = get_fs (); | |
604 | ||
605 | set_fs (KERNEL_DS); | |
606 | ret = sys_sched_rr_get_interval(pid, &t); | |
607 | set_fs (old_fs); | |
608 | if (put_compat_timespec(&t, interval)) | |
609 | return -EFAULT; | |
610 | return ret; | |
611 | } | |
612 | ||
613 | asmlinkage long | |
614 | sys32_rt_sigpending(compat_sigset_t __user *set, compat_size_t sigsetsize) | |
615 | { | |
616 | sigset_t s; | |
617 | compat_sigset_t s32; | |
618 | int ret; | |
619 | mm_segment_t old_fs = get_fs(); | |
620 | ||
621 | set_fs (KERNEL_DS); | |
622 | ret = sys_rt_sigpending(&s, sigsetsize); | |
623 | set_fs (old_fs); | |
624 | if (!ret) { | |
625 | switch (_NSIG_WORDS) { | |
626 | case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3]; | |
627 | case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2]; | |
628 | case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1]; | |
629 | case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0]; | |
630 | } | |
631 | if (copy_to_user (set, &s32, sizeof(compat_sigset_t))) | |
632 | return -EFAULT; | |
633 | } | |
634 | return ret; | |
635 | } | |
636 | ||
637 | asmlinkage long | |
638 | sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo) | |
639 | { | |
640 | siginfo_t info; | |
641 | int ret; | |
642 | mm_segment_t old_fs = get_fs(); | |
643 | ||
644 | if (copy_siginfo_from_user32(&info, uinfo)) | |
645 | return -EFAULT; | |
646 | set_fs (KERNEL_DS); | |
647 | ret = sys_rt_sigqueueinfo(pid, sig, &info); | |
648 | set_fs (old_fs); | |
649 | return ret; | |
650 | } | |
651 | ||
652 | /* These are here just in case some old ia32 binary calls it. */ | |
653 | asmlinkage long | |
654 | sys32_pause(void) | |
655 | { | |
656 | current->state = TASK_INTERRUPTIBLE; | |
657 | schedule(); | |
658 | return -ERESTARTNOHAND; | |
659 | } | |
660 | ||
661 | ||
662 | #ifdef CONFIG_SYSCTL | |
663 | struct sysctl_ia32 { | |
664 | unsigned int name; | |
665 | int nlen; | |
666 | unsigned int oldval; | |
667 | unsigned int oldlenp; | |
668 | unsigned int newval; | |
669 | unsigned int newlen; | |
670 | unsigned int __unused[4]; | |
671 | }; | |
672 | ||
673 | ||
674 | asmlinkage long | |
675 | sys32_sysctl(struct sysctl_ia32 __user *args32) | |
676 | { | |
677 | struct sysctl_ia32 a32; | |
678 | mm_segment_t old_fs = get_fs (); | |
679 | void __user *oldvalp, *newvalp; | |
680 | size_t oldlen; | |
681 | int __user *namep; | |
682 | long ret; | |
683 | extern int do_sysctl(int *name, int nlen, void *oldval, size_t *oldlenp, | |
684 | void *newval, size_t newlen); | |
685 | ||
686 | ||
687 | if (copy_from_user(&a32, args32, sizeof (a32))) | |
688 | return -EFAULT; | |
689 | ||
690 | /* | |
691 | * We need to pre-validate these because we have to disable address checking | |
692 | * before calling do_sysctl() because of OLDLEN but we can't run the risk of the | |
693 | * user specifying bad addresses here. Well, since we're dealing with 32 bit | |
694 | * addresses, we KNOW that access_ok() will always succeed, so this is an | |
695 | * expensive NOP, but so what... | |
696 | */ | |
697 | namep = compat_ptr(a32.name); | |
698 | oldvalp = compat_ptr(a32.oldval); | |
699 | newvalp = compat_ptr(a32.newval); | |
700 | ||
701 | if ((oldvalp && get_user(oldlen, (int __user *)compat_ptr(a32.oldlenp))) | |
702 | || !access_ok(VERIFY_WRITE, namep, 0) | |
703 | || !access_ok(VERIFY_WRITE, oldvalp, 0) | |
704 | || !access_ok(VERIFY_WRITE, newvalp, 0)) | |
705 | return -EFAULT; | |
706 | ||
707 | set_fs(KERNEL_DS); | |
708 | lock_kernel(); | |
709 | ret = do_sysctl(namep, a32.nlen, oldvalp, &oldlen, newvalp, (size_t) a32.newlen); | |
710 | unlock_kernel(); | |
711 | set_fs(old_fs); | |
712 | ||
713 | if (oldvalp && put_user (oldlen, (int __user *)compat_ptr(a32.oldlenp))) | |
714 | return -EFAULT; | |
715 | ||
716 | return ret; | |
717 | } | |
718 | #endif | |
719 | ||
720 | /* warning: next two assume little endian */ | |
721 | asmlinkage long | |
722 | sys32_pread(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi) | |
723 | { | |
724 | return sys_pread64(fd, ubuf, count, | |
725 | ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
726 | } | |
727 | ||
728 | asmlinkage long | |
729 | sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi) | |
730 | { | |
731 | return sys_pwrite64(fd, ubuf, count, | |
732 | ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
733 | } | |
734 | ||
735 | ||
736 | asmlinkage long | |
737 | sys32_personality(unsigned long personality) | |
738 | { | |
739 | int ret; | |
740 | if (personality(current->personality) == PER_LINUX32 && | |
741 | personality == PER_LINUX) | |
742 | personality = PER_LINUX32; | |
743 | ret = sys_personality(personality); | |
744 | if (ret == PER_LINUX32) | |
745 | ret = PER_LINUX; | |
746 | return ret; | |
747 | } | |
748 | ||
749 | asmlinkage long | |
750 | sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count) | |
751 | { | |
752 | mm_segment_t old_fs = get_fs(); | |
753 | int ret; | |
754 | off_t of; | |
755 | ||
756 | if (offset && get_user(of, offset)) | |
757 | return -EFAULT; | |
758 | ||
759 | set_fs(KERNEL_DS); | |
760 | ret = sys_sendfile(out_fd, in_fd, offset ? &of : NULL, count); | |
761 | set_fs(old_fs); | |
762 | ||
83b942bd | 763 | if (offset && put_user(of, offset)) |
1da177e4 LT |
764 | return -EFAULT; |
765 | ||
766 | return ret; | |
767 | } | |
768 | ||
1da177e4 LT |
769 | asmlinkage long sys32_mmap2(unsigned long addr, unsigned long len, |
770 | unsigned long prot, unsigned long flags, | |
771 | unsigned long fd, unsigned long pgoff) | |
772 | { | |
773 | struct mm_struct *mm = current->mm; | |
774 | unsigned long error; | |
775 | struct file * file = NULL; | |
776 | ||
777 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
778 | if (!(flags & MAP_ANONYMOUS)) { | |
779 | file = fget(fd); | |
780 | if (!file) | |
781 | return -EBADF; | |
782 | } | |
783 | ||
784 | down_write(&mm->mmap_sem); | |
785 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
786 | up_write(&mm->mmap_sem); | |
787 | ||
788 | if (file) | |
789 | fput(file); | |
790 | return error; | |
791 | } | |
792 | ||
793 | asmlinkage long sys32_olduname(struct oldold_utsname __user * name) | |
794 | { | |
795 | int error; | |
796 | ||
797 | if (!name) | |
798 | return -EFAULT; | |
799 | if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname))) | |
800 | return -EFAULT; | |
801 | ||
802 | down_read(&uts_sem); | |
803 | ||
804 | error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN); | |
805 | __put_user(0,name->sysname+__OLD_UTS_LEN); | |
806 | __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN); | |
807 | __put_user(0,name->nodename+__OLD_UTS_LEN); | |
808 | __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN); | |
809 | __put_user(0,name->release+__OLD_UTS_LEN); | |
810 | __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN); | |
811 | __put_user(0,name->version+__OLD_UTS_LEN); | |
812 | { | |
813 | char *arch = "x86_64"; | |
814 | if (personality(current->personality) == PER_LINUX32) | |
815 | arch = "i686"; | |
816 | ||
817 | __copy_to_user(&name->machine,arch,strlen(arch)+1); | |
818 | } | |
819 | ||
820 | up_read(&uts_sem); | |
821 | ||
822 | error = error ? -EFAULT : 0; | |
823 | ||
824 | return error; | |
825 | } | |
826 | ||
827 | long sys32_uname(struct old_utsname __user * name) | |
828 | { | |
829 | int err; | |
830 | if (!name) | |
831 | return -EFAULT; | |
832 | down_read(&uts_sem); | |
833 | err=copy_to_user(name, &system_utsname, sizeof (*name)); | |
834 | up_read(&uts_sem); | |
835 | if (personality(current->personality) == PER_LINUX32) | |
836 | err |= copy_to_user(&name->machine, "i686", 5); | |
837 | return err?-EFAULT:0; | |
838 | } | |
839 | ||
840 | long sys32_ustat(unsigned dev, struct ustat32 __user *u32p) | |
841 | { | |
842 | struct ustat u; | |
843 | mm_segment_t seg; | |
844 | int ret; | |
845 | ||
846 | seg = get_fs(); | |
847 | set_fs(KERNEL_DS); | |
848 | ret = sys_ustat(dev,&u); | |
849 | set_fs(seg); | |
850 | if (ret >= 0) { | |
851 | if (!access_ok(VERIFY_WRITE,u32p,sizeof(struct ustat32)) || | |
852 | __put_user((__u32) u.f_tfree, &u32p->f_tfree) || | |
853 | __put_user((__u32) u.f_tinode, &u32p->f_tfree) || | |
854 | __copy_to_user(&u32p->f_fname, u.f_fname, sizeof(u.f_fname)) || | |
855 | __copy_to_user(&u32p->f_fpack, u.f_fpack, sizeof(u.f_fpack))) | |
856 | ret = -EFAULT; | |
857 | } | |
858 | return ret; | |
859 | } | |
860 | ||
861 | asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv, | |
862 | compat_uptr_t __user *envp, struct pt_regs *regs) | |
863 | { | |
864 | long error; | |
865 | char * filename; | |
866 | ||
867 | filename = getname(name); | |
868 | error = PTR_ERR(filename); | |
869 | if (IS_ERR(filename)) | |
870 | return error; | |
871 | error = compat_do_execve(filename, argv, envp, regs); | |
872 | if (error == 0) { | |
873 | task_lock(current); | |
874 | current->ptrace &= ~PT_DTRACE; | |
875 | task_unlock(current); | |
876 | } | |
877 | putname(filename); | |
878 | return error; | |
879 | } | |
880 | ||
881 | asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp, | |
882 | struct pt_regs *regs) | |
883 | { | |
884 | void __user *parent_tid = (void __user *)regs->rdx; | |
885 | void __user *child_tid = (void __user *)regs->rdi; | |
886 | if (!newsp) | |
887 | newsp = regs->rsp; | |
888 | return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid); | |
889 | } | |
890 | ||
891 | /* | |
892 | * Some system calls that need sign extended arguments. This could be done by a generic wrapper. | |
893 | */ | |
894 | ||
895 | long sys32_lseek (unsigned int fd, int offset, unsigned int whence) | |
896 | { | |
897 | return sys_lseek(fd, offset, whence); | |
898 | } | |
899 | ||
900 | long sys32_kill(int pid, int sig) | |
901 | { | |
902 | return sys_kill(pid, sig); | |
903 | } | |
904 | ||
1da177e4 LT |
905 | long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high, |
906 | __u32 len_low, __u32 len_high, int advice) | |
907 | { | |
908 | return sys_fadvise64_64(fd, | |
909 | (((u64)offset_high)<<32) | offset_low, | |
910 | (((u64)len_high)<<32) | len_low, | |
911 | advice); | |
912 | } | |
913 | ||
914 | long sys32_vm86_warning(void) | |
915 | { | |
916 | struct task_struct *me = current; | |
917 | static char lastcomm[sizeof(me->comm)]; | |
918 | if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) { | |
bebfa101 | 919 | compat_printk(KERN_INFO "%s: vm86 mode not supported on 64 bit kernel\n", |
1da177e4 LT |
920 | me->comm); |
921 | strncpy(lastcomm, me->comm, sizeof(lastcomm)); | |
922 | } | |
923 | return -ENOSYS; | |
924 | } | |
925 | ||
926 | long sys32_lookup_dcookie(u32 addr_low, u32 addr_high, | |
927 | char __user * buf, size_t len) | |
928 | { | |
929 | return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len); | |
930 | } | |
931 | ||
932 | static int __init ia32_init (void) | |
933 | { | |
934 | printk("IA32 emulation $Id: sys_ia32.c,v 1.32 2002/03/24 13:02:28 ak Exp $\n"); | |
935 | return 0; | |
936 | } | |
937 | ||
938 | __initcall(ia32_init); | |
939 | ||
940 | extern unsigned long ia32_sys_call_table[]; | |
941 | EXPORT_SYMBOL(ia32_sys_call_table); |