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Implement 32-bit compatibility for waitid(2).
[linux-2.6/x86.git] / arch / mips / kernel / linux32.c
blob120dd897162e077c8b501d803234d81421dd38af
1 /*
2 * Conversion between 32-bit and 64-bit native system calls.
3 *
4 * Copyright (C) 2000 Silicon Graphics, Inc.
5 * Written by Ulf Carlsson (ulfc@engr.sgi.com)
6 * sys32_execve from ia64/ia32 code, Feb 2000, Kanoj Sarcar (kanoj@sgi.com)
7 */
8 #include <linux/config.h>
9 #include <linux/compiler.h>
10 #include <linux/mm.h>
11 #include <linux/errno.h>
12 #include <linux/file.h>
13 #include <linux/smp_lock.h>
14 #include <linux/highuid.h>
15 #include <linux/dirent.h>
16 #include <linux/resource.h>
17 #include <linux/highmem.h>
18 #include <linux/time.h>
19 #include <linux/times.h>
20 #include <linux/poll.h>
21 #include <linux/slab.h>
22 #include <linux/skbuff.h>
23 #include <linux/filter.h>
24 #include <linux/shm.h>
25 #include <linux/sem.h>
26 #include <linux/msg.h>
27 #include <linux/icmpv6.h>
28 #include <linux/syscalls.h>
29 #include <linux/sysctl.h>
30 #include <linux/utime.h>
31 #include <linux/utsname.h>
32 #include <linux/personality.h>
33 #include <linux/timex.h>
34 #include <linux/dnotify.h>
35 #include <linux/module.h>
36 #include <linux/binfmts.h>
37 #include <linux/security.h>
38 #include <linux/compat.h>
39 #include <linux/vfs.h>
40
41 #include <net/sock.h>
42 #include <net/scm.h>
43
44 #include <asm/ipc.h>
45 #include <asm/sim.h>
46 #include <asm/uaccess.h>
47 #include <asm/mmu_context.h>
48 #include <asm/mman.h>
49
50 /* Use this to get at 32-bit user passed pointers. */
51 /* A() macro should be used for places where you e.g.
52 have some internal variable u32 and just want to get
53 rid of a compiler warning. AA() has to be used in
54 places where you want to convert a function argument
55 to 32bit pointer or when you e.g. access pt_regs
56 structure and want to consider 32bit registers only.
57 */
58 #define A(__x) ((unsigned long)(__x))
59 #define AA(__x) ((unsigned long)((int)__x))
60
61 #ifdef __MIPSEB__
62 #define merge_64(r1,r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
63 #endif
64 #ifdef __MIPSEL__
65 #define merge_64(r1,r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
66 #endif
67
68 /*
69 * Revalidate the inode. This is required for proper NFS attribute caching.
70 */
71
72 int cp_compat_stat(struct kstat *stat, struct compat_stat *statbuf)
73 {
74 struct compat_stat tmp;
75
76 if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev))
77 return -EOVERFLOW;
78
79 memset(&tmp, 0, sizeof(tmp));
80 tmp.st_dev = new_encode_dev(stat->dev);
81 tmp.st_ino = stat->ino;
82 tmp.st_mode = stat->mode;
83 tmp.st_nlink = stat->nlink;
84 SET_UID(tmp.st_uid, stat->uid);
85 SET_GID(tmp.st_gid, stat->gid);
86 tmp.st_rdev = new_encode_dev(stat->rdev);
87 tmp.st_size = stat->size;
88 tmp.st_atime = stat->atime.tv_sec;
89 tmp.st_mtime = stat->mtime.tv_sec;
90 tmp.st_ctime = stat->ctime.tv_sec;
91 #ifdef STAT_HAVE_NSEC
92 tmp.st_atime_nsec = stat->atime.tv_nsec;
93 tmp.st_mtime_nsec = stat->mtime.tv_nsec;
94 tmp.st_ctime_nsec = stat->ctime.tv_nsec;
95 #endif
96 tmp.st_blocks = stat->blocks;
97 tmp.st_blksize = stat->blksize;
98 return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
99 }
100
101 asmlinkage unsigned long
102 sys32_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
103 unsigned long flags, unsigned long fd, unsigned long pgoff)
104 {
105 struct file * file = NULL;
106 unsigned long error;
107
108 error = -EINVAL;
109 if (!(flags & MAP_ANONYMOUS)) {
110 error = -EBADF;
111 file = fget(fd);
112 if (!file)
113 goto out;
114 }
115 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
116
117 down_write(&current->mm->mmap_sem);
118 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
119 up_write(&current->mm->mmap_sem);
120 if (file)
121 fput(file);
122
123 out:
124 return error;
125 }
126
127
128 asmlinkage int sys_truncate64(const char *path, unsigned int high,
129 unsigned int low)
130 {
131 if ((int)high < 0)
132 return -EINVAL;
133 return sys_truncate(path, ((long) high << 32) | low);
134 }
135
136 asmlinkage int sys_ftruncate64(unsigned int fd, unsigned int high,
137 unsigned int low)
138 {
139 if ((int)high < 0)
140 return -EINVAL;
141 return sys_ftruncate(fd, ((long) high << 32) | low);
142 }
143
144 /*
145 * sys_execve() executes a new program.
146 */
147 asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
148 {
149 int error;
150 char * filename;
151
152 filename = getname(compat_ptr(regs.regs[4]));
153 error = PTR_ERR(filename);
154 if (IS_ERR(filename))
155 goto out;
156 error = compat_do_execve(filename, compat_ptr(regs.regs[5]),
157 compat_ptr(regs.regs[6]), &regs);
158 putname(filename);
159
160 out:
161 return error;
162 }
163
164 struct dirent32 {
165 unsigned int d_ino;
166 unsigned int d_off;
167 unsigned short d_reclen;
168 char d_name[NAME_MAX + 1];
169 };
170
171 static void
172 xlate_dirent(void *dirent64, void *dirent32, long n)
173 {
174 long off;
175 struct dirent *dirp;
176 struct dirent32 *dirp32;
177
178 off = 0;
179 while (off < n) {
180 dirp = (struct dirent *)(dirent64 + off);
181 dirp32 = (struct dirent32 *)(dirent32 + off);
182 off += dirp->d_reclen;
183 dirp32->d_ino = dirp->d_ino;
184 dirp32->d_off = (unsigned int)dirp->d_off;
185 dirp32->d_reclen = dirp->d_reclen;
186 strncpy(dirp32->d_name, dirp->d_name, dirp->d_reclen - ((3 * 4) + 2));
187 }
188 return;
189 }
190
191 asmlinkage long
192 sys32_getdents(unsigned int fd, void * dirent32, unsigned int count)
193 {
194 long n;
195 void *dirent64;
196
197 dirent64 = (void *)((unsigned long)(dirent32 + (sizeof(long) - 1)) & ~(sizeof(long) - 1));
198 if ((n = sys_getdents(fd, dirent64, count - (dirent64 - dirent32))) < 0)
199 return(n);
200 xlate_dirent(dirent64, dirent32, n);
201 return(n);
202 }
203
204 asmlinkage int old_readdir(unsigned int fd, void * dirent, unsigned int count);
205
206 asmlinkage int
207 sys32_readdir(unsigned int fd, void * dirent32, unsigned int count)
208 {
209 int n;
210 struct dirent dirent64;
211
212 if ((n = old_readdir(fd, &dirent64, count)) < 0)
213 return(n);
214 xlate_dirent(&dirent64, dirent32, dirent64.d_reclen);
215 return(n);
216 }
217
218 asmlinkage int
219 sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options)
220 {
221 return compat_sys_wait4(pid, stat_addr, options, NULL);
222 }
223
224 asmlinkage long
225 sysn32_waitid(int which, compat_pid_t pid,
226 siginfo_t __user *uinfo, int options,
227 struct compat_rusage __user *uru)
228 {
229 struct rusage ru;
230 long ret;
231 mm_segment_t old_fs = get_fs();
232
233 set_fs (KERNEL_DS);
234 ret = sys_waitid(which, pid, uinfo, options,
235 uru ? (struct rusage __user *) &ru : NULL);
236 set_fs (old_fs);
237
238 if (ret < 0 || uinfo->si_signo == 0)
239 return ret;
240
241 if (uru)
242 ret = put_compat_rusage(&ru, uru);
243 return ret;
244 }
245
246 struct sysinfo32 {
247 s32 uptime;
248 u32 loads[3];
249 u32 totalram;
250 u32 freeram;
251 u32 sharedram;
252 u32 bufferram;
253 u32 totalswap;
254 u32 freeswap;
255 u16 procs;
256 u32 totalhigh;
257 u32 freehigh;
258 u32 mem_unit;
259 char _f[8];
260 };
261
262 asmlinkage int sys32_sysinfo(struct sysinfo32 *info)
263 {
264 struct sysinfo s;
265 int ret, err;
266 mm_segment_t old_fs = get_fs ();
267
268 set_fs (KERNEL_DS);
269 ret = sys_sysinfo(&s);
270 set_fs (old_fs);
271 err = put_user (s.uptime, &info->uptime);
272 err |= __put_user (s.loads[0], &info->loads[0]);
273 err |= __put_user (s.loads[1], &info->loads[1]);
274 err |= __put_user (s.loads[2], &info->loads[2]);
275 err |= __put_user (s.totalram, &info->totalram);
276 err |= __put_user (s.freeram, &info->freeram);
277 err |= __put_user (s.sharedram, &info->sharedram);
278 err |= __put_user (s.bufferram, &info->bufferram);
279 err |= __put_user (s.totalswap, &info->totalswap);
280 err |= __put_user (s.freeswap, &info->freeswap);
281 err |= __put_user (s.procs, &info->procs);
282 err |= __put_user (s.totalhigh, &info->totalhigh);
283 err |= __put_user (s.freehigh, &info->freehigh);
284 err |= __put_user (s.mem_unit, &info->mem_unit);
285 if (err)
286 return -EFAULT;
287 return ret;
288 }
289
290 #define RLIM_INFINITY32 0x7fffffff
291 #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
292
293 struct rlimit32 {
294 int rlim_cur;
295 int rlim_max;
296 };
297
298 #ifdef __MIPSEB__
299 asmlinkage long sys32_truncate64(const char * path, unsigned long __dummy,
300 int length_hi, int length_lo)
301 #endif
302 #ifdef __MIPSEL__
303 asmlinkage long sys32_truncate64(const char * path, unsigned long __dummy,
304 int length_lo, int length_hi)
305 #endif
306 {
307 loff_t length;
308
309 length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo;
310
311 return sys_truncate(path, length);
312 }
313
314 #ifdef __MIPSEB__
315 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
316 int length_hi, int length_lo)
317 #endif
318 #ifdef __MIPSEL__
319 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
320 int length_lo, int length_hi)
321 #endif
322 {
323 loff_t length;
324
325 length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo;
326
327 return sys_ftruncate(fd, length);
328 }
329
330 static inline long
331 get_tv32(struct timeval *o, struct compat_timeval *i)
332 {
333 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
334 (__get_user(o->tv_sec, &i->tv_sec) |
335 __get_user(o->tv_usec, &i->tv_usec)));
336 }
337
338 static inline long
339 put_tv32(struct compat_timeval *o, struct timeval *i)
340 {
341 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
342 (__put_user(i->tv_sec, &o->tv_sec) |
343 __put_user(i->tv_usec, &o->tv_usec)));
344 }
345
346 extern struct timezone sys_tz;
347
348 asmlinkage int
349 sys32_gettimeofday(struct compat_timeval *tv, struct timezone *tz)
350 {
351 if (tv) {
352 struct timeval ktv;
353 do_gettimeofday(&ktv);
354 if (put_tv32(tv, &ktv))
355 return -EFAULT;
356 }
357 if (tz) {
358 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
359 return -EFAULT;
360 }
361 return 0;
362 }
363
364 static inline long get_ts32(struct timespec *o, struct compat_timeval *i)
365 {
366 long usec;
367
368 if (!access_ok(VERIFY_READ, i, sizeof(*i)))
369 return -EFAULT;
370 if (__get_user(o->tv_sec, &i->tv_sec))
371 return -EFAULT;
372 if (__get_user(usec, &i->tv_usec))
373 return -EFAULT;
374 o->tv_nsec = usec * 1000;
375 return 0;
376 }
377
378 asmlinkage int
379 sys32_settimeofday(struct compat_timeval *tv, struct timezone *tz)
380 {
381 struct timespec kts;
382 struct timezone ktz;
383
384 if (tv) {
385 if (get_ts32(&kts, tv))
386 return -EFAULT;
387 }
388 if (tz) {
389 if (copy_from_user(&ktz, tz, sizeof(ktz)))
390 return -EFAULT;
391 }
392
393 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
394 }
395
396 asmlinkage int sys32_llseek(unsigned int fd, unsigned int offset_high,
397 unsigned int offset_low, loff_t * result,
398 unsigned int origin)
399 {
400 return sys_llseek(fd, offset_high, offset_low, result, origin);
401 }
402
403 /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
404 lseek back to original location. They fail just like lseek does on
405 non-seekable files. */
406
407 asmlinkage ssize_t sys32_pread(unsigned int fd, char * buf,
408 size_t count, u32 unused, u64 a4, u64 a5)
409 {
410 ssize_t ret;
411 struct file * file;
412 ssize_t (*read)(struct file *, char *, size_t, loff_t *);
413 loff_t pos;
414
415 ret = -EBADF;
416 file = fget(fd);
417 if (!file)
418 goto bad_file;
419 if (!(file->f_mode & FMODE_READ))
420 goto out;
421 pos = merge_64(a4, a5);
422 ret = rw_verify_area(READ, file, &pos, count);
423 if (ret)
424 goto out;
425 ret = -EINVAL;
426 if (!file->f_op || !(read = file->f_op->read))
427 goto out;
428 if (pos < 0)
429 goto out;
430 ret = -ESPIPE;
431 if (!(file->f_mode & FMODE_PREAD))
432 goto out;
433 ret = read(file, buf, count, &pos);
434 if (ret > 0)
435 dnotify_parent(file->f_dentry, DN_ACCESS);
436 out:
437 fput(file);
438 bad_file:
439 return ret;
440 }
441
442 asmlinkage ssize_t sys32_pwrite(unsigned int fd, const char * buf,
443 size_t count, u32 unused, u64 a4, u64 a5)
444 {
445 ssize_t ret;
446 struct file * file;
447 ssize_t (*write)(struct file *, const char *, size_t, loff_t *);
448 loff_t pos;
449
450 ret = -EBADF;
451 file = fget(fd);
452 if (!file)
453 goto bad_file;
454 if (!(file->f_mode & FMODE_WRITE))
455 goto out;
456 pos = merge_64(a4, a5);
457 ret = rw_verify_area(WRITE, file, &pos, count);
458 if (ret)
459 goto out;
460 ret = -EINVAL;
461 if (!file->f_op || !(write = file->f_op->write))
462 goto out;
463 if (pos < 0)
464 goto out;
465
466 ret = -ESPIPE;
467 if (!(file->f_mode & FMODE_PWRITE))
468 goto out;
469
470 ret = write(file, buf, count, &pos);
471 if (ret > 0)
472 dnotify_parent(file->f_dentry, DN_MODIFY);
473 out:
474 fput(file);
475 bad_file:
476 return ret;
477 }
478
479 asmlinkage int sys32_sched_rr_get_interval(compat_pid_t pid,
480 struct compat_timespec *interval)
481 {
482 struct timespec t;
483 int ret;
484 mm_segment_t old_fs = get_fs ();
485
486 set_fs (KERNEL_DS);
487 ret = sys_sched_rr_get_interval(pid, &t);
488 set_fs (old_fs);
489 if (put_user (t.tv_sec, &interval->tv_sec) ||
490 __put_user (t.tv_nsec, &interval->tv_nsec))
491 return -EFAULT;
492 return ret;
493 }
494
495 struct msgbuf32 { s32 mtype; char mtext[1]; };
496
497 struct ipc_perm32
498 {
499 key_t key;
500 __compat_uid_t uid;
501 __compat_gid_t gid;
502 __compat_uid_t cuid;
503 __compat_gid_t cgid;
504 compat_mode_t mode;
505 unsigned short seq;
506 };
507
508 struct ipc64_perm32 {
509 key_t key;
510 __compat_uid_t uid;
511 __compat_gid_t gid;
512 __compat_uid_t cuid;
513 __compat_gid_t cgid;
514 compat_mode_t mode;
515 unsigned short seq;
516 unsigned short __pad1;
517 unsigned int __unused1;
518 unsigned int __unused2;
519 };
520
521 struct semid_ds32 {
522 struct ipc_perm32 sem_perm; /* permissions .. see ipc.h */
523 compat_time_t sem_otime; /* last semop time */
524 compat_time_t sem_ctime; /* last change time */
525 u32 sem_base; /* ptr to first semaphore in array */
526 u32 sem_pending; /* pending operations to be processed */
527 u32 sem_pending_last; /* last pending operation */
528 u32 undo; /* undo requests on this array */
529 unsigned short sem_nsems; /* no. of semaphores in array */
530 };
531
532 struct semid64_ds32 {
533 struct ipc64_perm32 sem_perm;
534 compat_time_t sem_otime;
535 compat_time_t sem_ctime;
536 unsigned int sem_nsems;
537 unsigned int __unused1;
538 unsigned int __unused2;
539 };
540
541 struct msqid_ds32
542 {
543 struct ipc_perm32 msg_perm;
544 u32 msg_first;
545 u32 msg_last;
546 compat_time_t msg_stime;
547 compat_time_t msg_rtime;
548 compat_time_t msg_ctime;
549 u32 wwait;
550 u32 rwait;
551 unsigned short msg_cbytes;
552 unsigned short msg_qnum;
553 unsigned short msg_qbytes;
554 compat_ipc_pid_t msg_lspid;
555 compat_ipc_pid_t msg_lrpid;
556 };
557
558 struct msqid64_ds32 {
559 struct ipc64_perm32 msg_perm;
560 compat_time_t msg_stime;
561 unsigned int __unused1;
562 compat_time_t msg_rtime;
563 unsigned int __unused2;
564 compat_time_t msg_ctime;
565 unsigned int __unused3;
566 unsigned int msg_cbytes;
567 unsigned int msg_qnum;
568 unsigned int msg_qbytes;
569 compat_pid_t msg_lspid;
570 compat_pid_t msg_lrpid;
571 unsigned int __unused4;
572 unsigned int __unused5;
573 };
574
575 struct shmid_ds32 {
576 struct ipc_perm32 shm_perm;
577 int shm_segsz;
578 compat_time_t shm_atime;
579 compat_time_t shm_dtime;
580 compat_time_t shm_ctime;
581 compat_ipc_pid_t shm_cpid;
582 compat_ipc_pid_t shm_lpid;
583 unsigned short shm_nattch;
584 };
585
586 struct shmid64_ds32 {
587 struct ipc64_perm32 shm_perm;
588 compat_size_t shm_segsz;
589 compat_time_t shm_atime;
590 compat_time_t shm_dtime;
591 compat_time_t shm_ctime;
592 compat_pid_t shm_cpid;
593 compat_pid_t shm_lpid;
594 unsigned int shm_nattch;
595 unsigned int __unused1;
596 unsigned int __unused2;
597 };
598
599 struct ipc_kludge32 {
600 u32 msgp;
601 s32 msgtyp;
602 };
603
604 static int
605 do_sys32_semctl(int first, int second, int third, void *uptr)
606 {
607 union semun fourth;
608 u32 pad;
609 int err, err2;
610 struct semid64_ds s;
611 mm_segment_t old_fs;
612
613 if (!uptr)
614 return -EINVAL;
615 err = -EFAULT;
616 if (get_user (pad, (u32 *)uptr))
617 return err;
618 if ((third & ~IPC_64) == SETVAL)
619 fourth.val = (int)pad;
620 else
621 fourth.__pad = (void *)A(pad);
622 switch (third & ~IPC_64) {
623 case IPC_INFO:
624 case IPC_RMID:
625 case IPC_SET:
626 case SEM_INFO:
627 case GETVAL:
628 case GETPID:
629 case GETNCNT:
630 case GETZCNT:
631 case GETALL:
632 case SETVAL:
633 case SETALL:
634 err = sys_semctl (first, second, third, fourth);
635 break;
636
637 case IPC_STAT:
638 case SEM_STAT:
639 fourth.__pad = &s;
640 old_fs = get_fs();
641 set_fs(KERNEL_DS);
642 err = sys_semctl(first, second, third | IPC_64, fourth);
643 set_fs(old_fs);
644
645 if (third & IPC_64) {
646 struct semid64_ds32 *usp64 = (struct semid64_ds32 *) A(pad);
647
648 if (!access_ok(VERIFY_WRITE, usp64, sizeof(*usp64))) {
649 err = -EFAULT;
650 break;
651 }
652 err2 = __put_user(s.sem_perm.key, &usp64->sem_perm.key);
653 err2 |= __put_user(s.sem_perm.uid, &usp64->sem_perm.uid);
654 err2 |= __put_user(s.sem_perm.gid, &usp64->sem_perm.gid);
655 err2 |= __put_user(s.sem_perm.cuid, &usp64->sem_perm.cuid);
656 err2 |= __put_user(s.sem_perm.cgid, &usp64->sem_perm.cgid);
657 err2 |= __put_user(s.sem_perm.mode, &usp64->sem_perm.mode);
658 err2 |= __put_user(s.sem_perm.seq, &usp64->sem_perm.seq);
659 err2 |= __put_user(s.sem_otime, &usp64->sem_otime);
660 err2 |= __put_user(s.sem_ctime, &usp64->sem_ctime);
661 err2 |= __put_user(s.sem_nsems, &usp64->sem_nsems);
662 } else {
663 struct semid_ds32 *usp32 = (struct semid_ds32 *) A(pad);
664
665 if (!access_ok(VERIFY_WRITE, usp32, sizeof(*usp32))) {
666 err = -EFAULT;
667 break;
668 }
669 err2 = __put_user(s.sem_perm.key, &usp32->sem_perm.key);
670 err2 |= __put_user(s.sem_perm.uid, &usp32->sem_perm.uid);
671 err2 |= __put_user(s.sem_perm.gid, &usp32->sem_perm.gid);
672 err2 |= __put_user(s.sem_perm.cuid, &usp32->sem_perm.cuid);
673 err2 |= __put_user(s.sem_perm.cgid, &usp32->sem_perm.cgid);
674 err2 |= __put_user(s.sem_perm.mode, &usp32->sem_perm.mode);
675 err2 |= __put_user(s.sem_perm.seq, &usp32->sem_perm.seq);
676 err2 |= __put_user(s.sem_otime, &usp32->sem_otime);
677 err2 |= __put_user(s.sem_ctime, &usp32->sem_ctime);
678 err2 |= __put_user(s.sem_nsems, &usp32->sem_nsems);
679 }
680 if (err2)
681 err = -EFAULT;
682 break;
683
684 default:
685 err = - EINVAL;
686 break;
687 }
688
689 return err;
690 }
691
692 static int
693 do_sys32_msgsnd (int first, int second, int third, void *uptr)
694 {
695 struct msgbuf32 *up = (struct msgbuf32 *)uptr;
696 struct msgbuf *p;
697 mm_segment_t old_fs;
698 int err;
699
700 if (second < 0)
701 return -EINVAL;
702 p = kmalloc (second + sizeof (struct msgbuf)
703 + 4, GFP_USER);
704 if (!p)
705 return -ENOMEM;
706 err = get_user (p->mtype, &up->mtype);
707 if (err)
708 goto out;
709 err |= __copy_from_user (p->mtext, &up->mtext, second);
710 if (err)
711 goto out;
712 old_fs = get_fs ();
713 set_fs (KERNEL_DS);
714 err = sys_msgsnd (first, p, second, third);
715 set_fs (old_fs);
716 out:
717 kfree (p);
718
719 return err;
720 }
721
722 static int
723 do_sys32_msgrcv (int first, int second, int msgtyp, int third,
724 int version, void *uptr)
725 {
726 struct msgbuf32 *up;
727 struct msgbuf *p;
728 mm_segment_t old_fs;
729 int err;
730
731 if (!version) {
732 struct ipc_kludge32 *uipck = (struct ipc_kludge32 *)uptr;
733 struct ipc_kludge32 ipck;
734
735 err = -EINVAL;
736 if (!uptr)
737 goto out;
738 err = -EFAULT;
739 if (copy_from_user (&ipck, uipck, sizeof (struct ipc_kludge32)))
740 goto out;
741 uptr = (void *)AA(ipck.msgp);
742 msgtyp = ipck.msgtyp;
743 }
744
745 if (second < 0)
746 return -EINVAL;
747 err = -ENOMEM;
748 p = kmalloc (second + sizeof (struct msgbuf) + 4, GFP_USER);
749 if (!p)
750 goto out;
751 old_fs = get_fs ();
752 set_fs (KERNEL_DS);
753 err = sys_msgrcv (first, p, second + 4, msgtyp, third);
754 set_fs (old_fs);
755 if (err < 0)
756 goto free_then_out;
757 up = (struct msgbuf32 *)uptr;
758 if (put_user (p->mtype, &up->mtype) ||
759 __copy_to_user (&up->mtext, p->mtext, err))
760 err = -EFAULT;
761 free_then_out:
762 kfree (p);
763 out:
764 return err;
765 }
766
767 static int
768 do_sys32_msgctl (int first, int second, void *uptr)
769 {
770 int err = -EINVAL, err2;
771 struct msqid64_ds m;
772 struct msqid_ds32 *up32 = (struct msqid_ds32 *)uptr;
773 struct msqid64_ds32 *up64 = (struct msqid64_ds32 *)uptr;
774 mm_segment_t old_fs;
775
776 switch (second & ~IPC_64) {
777 case IPC_INFO:
778 case IPC_RMID:
779 case MSG_INFO:
780 err = sys_msgctl (first, second, (struct msqid_ds *)uptr);
781 break;
782
783 case IPC_SET:
784 if (second & IPC_64) {
785 if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) {
786 err = -EFAULT;
787 break;
788 }
789 err = __get_user(m.msg_perm.uid, &up64->msg_perm.uid);
790 err |= __get_user(m.msg_perm.gid, &up64->msg_perm.gid);
791 err |= __get_user(m.msg_perm.mode, &up64->msg_perm.mode);
792 err |= __get_user(m.msg_qbytes, &up64->msg_qbytes);
793 } else {
794 if (!access_ok(VERIFY_READ, up32, sizeof(*up32))) {
795 err = -EFAULT;
796 break;
797 }
798 err = __get_user(m.msg_perm.uid, &up32->msg_perm.uid);
799 err |= __get_user(m.msg_perm.gid, &up32->msg_perm.gid);
800 err |= __get_user(m.msg_perm.mode, &up32->msg_perm.mode);
801 err |= __get_user(m.msg_qbytes, &up32->msg_qbytes);
802 }
803 if (err)
804 break;
805 old_fs = get_fs();
806 set_fs(KERNEL_DS);
807 err = sys_msgctl(first, second | IPC_64, (struct msqid_ds *)&m);
808 set_fs(old_fs);
809 break;
810
811 case IPC_STAT:
812 case MSG_STAT:
813 old_fs = get_fs();
814 set_fs(KERNEL_DS);
815 err = sys_msgctl(first, second | IPC_64, (struct msqid_ds *)&m);
816 set_fs(old_fs);
817 if (second & IPC_64) {
818 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) {
819 err = -EFAULT;
820 break;
821 }
822 err2 = __put_user(m.msg_perm.key, &up64->msg_perm.key);
823 err2 |= __put_user(m.msg_perm.uid, &up64->msg_perm.uid);
824 err2 |= __put_user(m.msg_perm.gid, &up64->msg_perm.gid);
825 err2 |= __put_user(m.msg_perm.cuid, &up64->msg_perm.cuid);
826 err2 |= __put_user(m.msg_perm.cgid, &up64->msg_perm.cgid);
827 err2 |= __put_user(m.msg_perm.mode, &up64->msg_perm.mode);
828 err2 |= __put_user(m.msg_perm.seq, &up64->msg_perm.seq);
829 err2 |= __put_user(m.msg_stime, &up64->msg_stime);
830 err2 |= __put_user(m.msg_rtime, &up64->msg_rtime);
831 err2 |= __put_user(m.msg_ctime, &up64->msg_ctime);
832 err2 |= __put_user(m.msg_cbytes, &up64->msg_cbytes);
833 err2 |= __put_user(m.msg_qnum, &up64->msg_qnum);
834 err2 |= __put_user(m.msg_qbytes, &up64->msg_qbytes);
835 err2 |= __put_user(m.msg_lspid, &up64->msg_lspid);
836 err2 |= __put_user(m.msg_lrpid, &up64->msg_lrpid);
837 if (err2)
838 err = -EFAULT;
839 } else {
840 if (!access_ok(VERIFY_WRITE, up32, sizeof(*up32))) {
841 err = -EFAULT;
842 break;
843 }
844 err2 = __put_user(m.msg_perm.key, &up32->msg_perm.key);
845 err2 |= __put_user(m.msg_perm.uid, &up32->msg_perm.uid);
846 err2 |= __put_user(m.msg_perm.gid, &up32->msg_perm.gid);
847 err2 |= __put_user(m.msg_perm.cuid, &up32->msg_perm.cuid);
848 err2 |= __put_user(m.msg_perm.cgid, &up32->msg_perm.cgid);
849 err2 |= __put_user(m.msg_perm.mode, &up32->msg_perm.mode);
850 err2 |= __put_user(m.msg_perm.seq, &up32->msg_perm.seq);
851 err2 |= __put_user(m.msg_stime, &up32->msg_stime);
852 err2 |= __put_user(m.msg_rtime, &up32->msg_rtime);
853 err2 |= __put_user(m.msg_ctime, &up32->msg_ctime);
854 err2 |= __put_user(m.msg_cbytes, &up32->msg_cbytes);
855 err2 |= __put_user(m.msg_qnum, &up32->msg_qnum);
856 err2 |= __put_user(m.msg_qbytes, &up32->msg_qbytes);
857 err2 |= __put_user(m.msg_lspid, &up32->msg_lspid);
858 err2 |= __put_user(m.msg_lrpid, &up32->msg_lrpid);
859 if (err2)
860 err = -EFAULT;
861 }
862 break;
863 }
864
865 return err;
866 }
867
868 static int
869 do_sys32_shmat (int first, int second, int third, int version, void *uptr)
870 {
871 unsigned long raddr;
872 u32 *uaddr = (u32 *)A((u32)third);
873 int err = -EINVAL;
874
875 if (version == 1)
876 return err;
877 err = do_shmat (first, uptr, second, &raddr);
878 if (err)
879 return err;
880 err = put_user (raddr, uaddr);
881 return err;
882 }
883
884 struct shm_info32 {
885 int used_ids;
886 u32 shm_tot, shm_rss, shm_swp;
887 u32 swap_attempts, swap_successes;
888 };
889
890 static int
891 do_sys32_shmctl (int first, int second, void *uptr)
892 {
893 struct shmid64_ds32 *up64 = (struct shmid64_ds32 *)uptr;
894 struct shmid_ds32 *up32 = (struct shmid_ds32 *)uptr;
895 struct shm_info32 *uip = (struct shm_info32 *)uptr;
896 int err = -EFAULT, err2;
897 struct shmid64_ds s64;
898 mm_segment_t old_fs;
899 struct shm_info si;
900 struct shmid_ds s;
901
902 switch (second & ~IPC_64) {
903 case IPC_INFO:
904 second = IPC_INFO; /* So that we don't have to translate it */
905 case IPC_RMID:
906 case SHM_LOCK:
907 case SHM_UNLOCK:
908 err = sys_shmctl(first, second, (struct shmid_ds *)uptr);
909 break;
910 case IPC_SET:
911 if (second & IPC_64) {
912 err = get_user(s.shm_perm.uid, &up64->shm_perm.uid);
913 err |= get_user(s.shm_perm.gid, &up64->shm_perm.gid);
914 err |= get_user(s.shm_perm.mode, &up64->shm_perm.mode);
915 } else {
916 err = get_user(s.shm_perm.uid, &up32->shm_perm.uid);
917 err |= get_user(s.shm_perm.gid, &up32->shm_perm.gid);
918 err |= get_user(s.shm_perm.mode, &up32->shm_perm.mode);
919 }
920 if (err)
921 break;
922 old_fs = get_fs();
923 set_fs(KERNEL_DS);
924 err = sys_shmctl(first, second & ~IPC_64, &s);
925 set_fs(old_fs);
926 break;
927
928 case IPC_STAT:
929 case SHM_STAT:
930 old_fs = get_fs();
931 set_fs(KERNEL_DS);
932 err = sys_shmctl(first, second | IPC_64, (void *) &s64);
933 set_fs(old_fs);
934 if (err < 0)
935 break;
936 if (second & IPC_64) {
937 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) {
938 err = -EFAULT;
939 break;
940 }
941 err2 = __put_user(s64.shm_perm.key, &up64->shm_perm.key);
942 err2 |= __put_user(s64.shm_perm.uid, &up64->shm_perm.uid);
943 err2 |= __put_user(s64.shm_perm.gid, &up64->shm_perm.gid);
944 err2 |= __put_user(s64.shm_perm.cuid, &up64->shm_perm.cuid);
945 err2 |= __put_user(s64.shm_perm.cgid, &up64->shm_perm.cgid);
946 err2 |= __put_user(s64.shm_perm.mode, &up64->shm_perm.mode);
947 err2 |= __put_user(s64.shm_perm.seq, &up64->shm_perm.seq);
948 err2 |= __put_user(s64.shm_atime, &up64->shm_atime);
949 err2 |= __put_user(s64.shm_dtime, &up64->shm_dtime);
950 err2 |= __put_user(s64.shm_ctime, &up64->shm_ctime);
951 err2 |= __put_user(s64.shm_segsz, &up64->shm_segsz);
952 err2 |= __put_user(s64.shm_nattch, &up64->shm_nattch);
953 err2 |= __put_user(s64.shm_cpid, &up64->shm_cpid);
954 err2 |= __put_user(s64.shm_lpid, &up64->shm_lpid);
955 } else {
956 if (!access_ok(VERIFY_WRITE, up32, sizeof(*up32))) {
957 err = -EFAULT;
958 break;
959 }
960 err2 = __put_user(s64.shm_perm.key, &up32->shm_perm.key);
961 err2 |= __put_user(s64.shm_perm.uid, &up32->shm_perm.uid);
962 err2 |= __put_user(s64.shm_perm.gid, &up32->shm_perm.gid);
963 err2 |= __put_user(s64.shm_perm.cuid, &up32->shm_perm.cuid);
964 err2 |= __put_user(s64.shm_perm.cgid, &up32->shm_perm.cgid);
965 err2 |= __put_user(s64.shm_perm.mode, &up32->shm_perm.mode);
966 err2 |= __put_user(s64.shm_perm.seq, &up32->shm_perm.seq);
967 err2 |= __put_user(s64.shm_atime, &up32->shm_atime);
968 err2 |= __put_user(s64.shm_dtime, &up32->shm_dtime);
969 err2 |= __put_user(s64.shm_ctime, &up32->shm_ctime);
970 err2 |= __put_user(s64.shm_segsz, &up32->shm_segsz);
971 err2 |= __put_user(s64.shm_nattch, &up32->shm_nattch);
972 err2 |= __put_user(s64.shm_cpid, &up32->shm_cpid);
973 err2 |= __put_user(s64.shm_lpid, &up32->shm_lpid);
974 }
975 if (err2)
976 err = -EFAULT;
977 break;
978
979 case SHM_INFO:
980 old_fs = get_fs();
981 set_fs(KERNEL_DS);
982 err = sys_shmctl(first, second, (void *)&si);
983 set_fs(old_fs);
984 if (err < 0)
985 break;
986 err2 = put_user(si.used_ids, &uip->used_ids);
987 err2 |= __put_user(si.shm_tot, &uip->shm_tot);
988 err2 |= __put_user(si.shm_rss, &uip->shm_rss);
989 err2 |= __put_user(si.shm_swp, &uip->shm_swp);
990 err2 |= __put_user(si.swap_attempts, &uip->swap_attempts);
991 err2 |= __put_user (si.swap_successes, &uip->swap_successes);
992 if (err2)
993 err = -EFAULT;
994 break;
995
996 default:
997 err = -EINVAL;
998 break;
999 }
1000
1001 return err;
1002 }
1003
1004 static int sys32_semtimedop(int semid, struct sembuf *tsems, int nsems,
1005 const struct compat_timespec *timeout32)
1006 {
1007 struct compat_timespec t32;
1008 struct timespec *t64 = compat_alloc_user_space(sizeof(*t64));
1009
1010 if (copy_from_user(&t32, timeout32, sizeof(t32)))
1011 return -EFAULT;
1012
1013 if (put_user(t32.tv_sec, &t64->tv_sec) ||
1014 put_user(t32.tv_nsec, &t64->tv_nsec))
1015 return -EFAULT;
1016
1017 return sys_semtimedop(semid, tsems, nsems, t64);
1018 }
1019
1020 asmlinkage long
1021 sys32_ipc (u32 call, int first, int second, int third, u32 ptr, u32 fifth)
1022 {
1023 int version, err;
1024
1025 version = call >> 16; /* hack for backward compatibility */
1026 call &= 0xffff;
1027
1028 switch (call) {
1029 case SEMOP:
1030 /* struct sembuf is the same on 32 and 64bit :)) */
1031 err = sys_semtimedop (first, (struct sembuf *)AA(ptr), second,
1032 NULL);
1033 break;
1034 case SEMTIMEDOP:
1035 err = sys32_semtimedop (first, (struct sembuf *)AA(ptr), second,
1036 (const struct compat_timespec __user *)AA(fifth));
1037 break;
1038 case SEMGET:
1039 err = sys_semget (first, second, third);
1040 break;
1041 case SEMCTL:
1042 err = do_sys32_semctl (first, second, third,
1043 (void *)AA(ptr));
1044 break;
1045
1046 case MSGSND:
1047 err = do_sys32_msgsnd (first, second, third,
1048 (void *)AA(ptr));
1049 break;
1050 case MSGRCV:
1051 err = do_sys32_msgrcv (first, second, fifth, third,
1052 version, (void *)AA(ptr));
1053 break;
1054 case MSGGET:
1055 err = sys_msgget ((key_t) first, second);
1056 break;
1057 case MSGCTL:
1058 err = do_sys32_msgctl (first, second, (void *)AA(ptr));
1059 break;
1060
1061 case SHMAT:
1062 err = do_sys32_shmat (first, second, third,
1063 version, (void *)AA(ptr));
1064 break;
1065 case SHMDT:
1066 err = sys_shmdt ((char *)A(ptr));
1067 break;
1068 case SHMGET:
1069 err = sys_shmget (first, (unsigned)second, third);
1070 break;
1071 case SHMCTL:
1072 err = do_sys32_shmctl (first, second, (void *)AA(ptr));
1073 break;
1074 default:
1075 err = -EINVAL;
1076 break;
1077 }
1078
1079 return err;
1080 }
1081
1082 asmlinkage long sys32_shmat(int shmid, char __user *shmaddr,
1083 int shmflg, int32_t *addr)
1084 {
1085 unsigned long raddr;
1086 int err;
1087
1088 err = do_shmat(shmid, shmaddr, shmflg, &raddr);
1089 if (err)
1090 return err;
1091
1092 return put_user(raddr, addr);
1093 }
1094
1095 struct sysctl_args32
1096 {
1097 compat_caddr_t name;
1098 int nlen;
1099 compat_caddr_t oldval;
1100 compat_caddr_t oldlenp;
1101 compat_caddr_t newval;
1102 compat_size_t newlen;
1103 unsigned int __unused[4];
1104 };
1105
1106 #ifdef CONFIG_SYSCTL
1107
1108 asmlinkage long sys32_sysctl(struct sysctl_args32 *args)
1109 {
1110 struct sysctl_args32 tmp;
1111 int error;
1112 size_t oldlen, *oldlenp = NULL;
1113 unsigned long addr = (((long)&args->__unused[0]) + 7) & ~7;
1114
1115 if (copy_from_user(&tmp, args, sizeof(tmp)))
1116 return -EFAULT;
1117
1118 if (tmp.oldval && tmp.oldlenp) {
1119 /* Duh, this is ugly and might not work if sysctl_args
1120 is in read-only memory, but do_sysctl does indirectly
1121 a lot of uaccess in both directions and we'd have to
1122 basically copy the whole sysctl.c here, and
1123 glibc's __sysctl uses rw memory for the structure
1124 anyway. */
1125 if (get_user(oldlen, (u32 *)A(tmp.oldlenp)) ||
1126 put_user(oldlen, (size_t *)addr))
1127 return -EFAULT;
1128 oldlenp = (size_t *)addr;
1129 }
1130
1131 lock_kernel();
1132 error = do_sysctl((int *)A(tmp.name), tmp.nlen, (void *)A(tmp.oldval),
1133 oldlenp, (void *)A(tmp.newval), tmp.newlen);
1134 unlock_kernel();
1135 if (oldlenp) {
1136 if (!error) {
1137 if (get_user(oldlen, (size_t *)addr) ||
1138 put_user(oldlen, (u32 *)A(tmp.oldlenp)))
1139 error = -EFAULT;
1140 }
1141 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
1142 }
1143 return error;
1144 }
1145
1146 #endif /* CONFIG_SYSCTL */
1147
1148 asmlinkage long sys32_newuname(struct new_utsname * name)
1149 {
1150 int ret = 0;
1151
1152 down_read(&uts_sem);
1153 if (copy_to_user(name,&system_utsname,sizeof *name))
1154 ret = -EFAULT;
1155 up_read(&uts_sem);
1156
1157 if (current->personality == PER_LINUX32 && !ret)
1158 if (copy_to_user(name->machine, "mips\0\0\0", 8))
1159 ret = -EFAULT;
1160
1161 return ret;
1162 }
1163
1164 asmlinkage int sys32_personality(unsigned long personality)
1165 {
1166 int ret;
1167 if (current->personality == PER_LINUX32 && personality == PER_LINUX)
1168 personality = PER_LINUX32;
1169 ret = sys_personality(personality);
1170 if (ret == PER_LINUX32)
1171 ret = PER_LINUX;
1172 return ret;
1173 }
1174
1175 /* ustat compatibility */
1176 struct ustat32 {
1177 compat_daddr_t f_tfree;
1178 compat_ino_t f_tinode;
1179 char f_fname[6];
1180 char f_fpack[6];
1181 };
1182
1183 extern asmlinkage long sys_ustat(dev_t dev, struct ustat * ubuf);
1184
1185 asmlinkage int sys32_ustat(dev_t dev, struct ustat32 * ubuf32)
1186 {
1187 int err;
1188 struct ustat tmp;
1189 struct ustat32 tmp32;
1190 mm_segment_t old_fs = get_fs();
1191
1192 set_fs(KERNEL_DS);
1193 err = sys_ustat(dev, &tmp);
1194 set_fs (old_fs);
1195
1196 if (err)
1197 goto out;
1198
1199 memset(&tmp32,0,sizeof(struct ustat32));
1200 tmp32.f_tfree = tmp.f_tfree;
1201 tmp32.f_tinode = tmp.f_tinode;
1202
1203 err = copy_to_user(ubuf32,&tmp32,sizeof(struct ustat32)) ? -EFAULT : 0;
1204
1205 out:
1206 return err;
1207 }
1208
1209 /* Handle adjtimex compatibility. */
1210
1211 struct timex32 {
1212 u32 modes;
1213 s32 offset, freq, maxerror, esterror;
1214 s32 status, constant, precision, tolerance;
1215 struct compat_timeval time;
1216 s32 tick;
1217 s32 ppsfreq, jitter, shift, stabil;
1218 s32 jitcnt, calcnt, errcnt, stbcnt;
1219 s32 :32; s32 :32; s32 :32; s32 :32;
1220 s32 :32; s32 :32; s32 :32; s32 :32;
1221 s32 :32; s32 :32; s32 :32; s32 :32;
1222 };
1223
1224 extern int do_adjtimex(struct timex *);
1225
1226 asmlinkage int sys32_adjtimex(struct timex32 *utp)
1227 {
1228 struct timex txc;
1229 int ret;
1230
1231 memset(&txc, 0, sizeof(struct timex));
1232
1233 if (get_user(txc.modes, &utp->modes) ||
1234 __get_user(txc.offset, &utp->offset) ||
1235 __get_user(txc.freq, &utp->freq) ||
1236 __get_user(txc.maxerror, &utp->maxerror) ||
1237 __get_user(txc.esterror, &utp->esterror) ||
1238 __get_user(txc.status, &utp->status) ||
1239 __get_user(txc.constant, &utp->constant) ||
1240 __get_user(txc.precision, &utp->precision) ||
1241 __get_user(txc.tolerance, &utp->tolerance) ||
1242 __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
1243 __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
1244 __get_user(txc.tick, &utp->tick) ||
1245 __get_user(txc.ppsfreq, &utp->ppsfreq) ||
1246 __get_user(txc.jitter, &utp->jitter) ||
1247 __get_user(txc.shift, &utp->shift) ||
1248 __get_user(txc.stabil, &utp->stabil) ||
1249 __get_user(txc.jitcnt, &utp->jitcnt) ||
1250 __get_user(txc.calcnt, &utp->calcnt) ||
1251 __get_user(txc.errcnt, &utp->errcnt) ||
1252 __get_user(txc.stbcnt, &utp->stbcnt))
1253 return -EFAULT;
1254
1255 ret = do_adjtimex(&txc);
1256
1257 if (put_user(txc.modes, &utp->modes) ||
1258 __put_user(txc.offset, &utp->offset) ||
1259 __put_user(txc.freq, &utp->freq) ||
1260 __put_user(txc.maxerror, &utp->maxerror) ||
1261 __put_user(txc.esterror, &utp->esterror) ||
1262 __put_user(txc.status, &utp->status) ||
1263 __put_user(txc.constant, &utp->constant) ||
1264 __put_user(txc.precision, &utp->precision) ||
1265 __put_user(txc.tolerance, &utp->tolerance) ||
1266 __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
1267 __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
1268 __put_user(txc.tick, &utp->tick) ||
1269 __put_user(txc.ppsfreq, &utp->ppsfreq) ||
1270 __put_user(txc.jitter, &utp->jitter) ||
1271 __put_user(txc.shift, &utp->shift) ||
1272 __put_user(txc.stabil, &utp->stabil) ||
1273 __put_user(txc.jitcnt, &utp->jitcnt) ||
1274 __put_user(txc.calcnt, &utp->calcnt) ||
1275 __put_user(txc.errcnt, &utp->errcnt) ||
1276 __put_user(txc.stbcnt, &utp->stbcnt))
1277 ret = -EFAULT;
1278
1279 return ret;
1280 }
1281
1282 asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t *offset,
1283 s32 count)
1284 {
1285 mm_segment_t old_fs = get_fs();
1286 int ret;
1287 off_t of;
1288
1289 if (offset && get_user(of, offset))
1290 return -EFAULT;
1291
1292 set_fs(KERNEL_DS);
1293 ret = sys_sendfile(out_fd, in_fd, offset ? &of : NULL, count);
1294 set_fs(old_fs);
1295
1296 if (offset && put_user(of, offset))
1297 return -EFAULT;
1298
1299 return ret;
1300 }
1301
1302 asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
1303 size_t count)
1304 {
1305 return sys_readahead(fd, merge_64(a2, a3), count);
1306 }
1307
1308 /* Argument list sizes for sys_socketcall */
1309 #define AL(x) ((x) * sizeof(unsigned int))
1310 static unsigned char socketcall_nargs[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
1311 AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
1312 AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)};
1313 #undef AL
1314
1315 /*
1316 * System call vectors.
1317 *
1318 * Argument checking cleaned up. Saved 20% in size.
1319 * This function doesn't need to set the kernel lock because
1320 * it is set by the callees.
1321 */
1322
1323 asmlinkage long sys32_socketcall(int call, unsigned int *args32)
1324 {
1325 unsigned int a[6];
1326 unsigned int a0,a1;
1327 int err;
1328
1329 extern asmlinkage long sys_socket(int family, int type, int protocol);
1330 extern asmlinkage long sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen);
1331 extern asmlinkage long sys_connect(int fd, struct sockaddr __user *uservaddr, int addrlen);
1332 extern asmlinkage long sys_listen(int fd, int backlog);
1333 extern asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr, int __user *upeer_addrlen);
1334 extern asmlinkage long sys_getsockname(int fd, struct sockaddr __user *usockaddr, int __user *usockaddr_len);
1335 extern asmlinkage long sys_getpeername(int fd, struct sockaddr __user *usockaddr, int __user *usockaddr_len);
1336 extern asmlinkage long sys_socketpair(int family, int type, int protocol, int __user *usockvec);
1337 extern asmlinkage long sys_send(int fd, void __user * buff, size_t len, unsigned flags);
1338 extern asmlinkage long sys_sendto(int fd, void __user * buff, size_t len, unsigned flags,
1339 struct sockaddr __user *addr, int addr_len);
1340 extern asmlinkage long sys_recv(int fd, void __user * ubuf, size_t size, unsigned flags);
1341 extern asmlinkage long sys_recvfrom(int fd, void __user * ubuf, size_t size, unsigned flags,
1342 struct sockaddr __user *addr, int __user *addr_len);
1343 extern asmlinkage long sys_shutdown(int fd, int how);
1344 extern asmlinkage long sys_setsockopt(int fd, int level, int optname, char __user *optval, int optlen);
1345 extern asmlinkage long sys_getsockopt(int fd, int level, int optname, char __user *optval, int *optlen);
1346 extern asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags);
1347 extern asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg, unsigned int flags);
1348
1349
1350 if(call<1||call>SYS_RECVMSG)
1351 return -EINVAL;
1352
1353 /* copy_from_user should be SMP safe. */
1354 if (copy_from_user(a, args32, socketcall_nargs[call]))
1355 return -EFAULT;
1356
1357 a0=a[0];
1358 a1=a[1];
1359
1360 switch(call)
1361 {
1362 case SYS_SOCKET:
1363 err = sys_socket(a0,a1,a[2]);
1364 break;
1365 case SYS_BIND:
1366 err = sys_bind(a0,(struct sockaddr __user *)A(a1), a[2]);
1367 break;
1368 case SYS_CONNECT:
1369 err = sys_connect(a0, (struct sockaddr __user *)A(a1), a[2]);
1370 break;
1371 case SYS_LISTEN:
1372 err = sys_listen(a0,a1);
1373 break;
1374 case SYS_ACCEPT:
1375 err = sys_accept(a0,(struct sockaddr __user *)A(a1), (int __user *)A(a[2]));
1376 break;
1377 case SYS_GETSOCKNAME:
1378 err = sys_getsockname(a0,(struct sockaddr __user *)A(a1), (int __user *)A(a[2]));
1379 break;
1380 case SYS_GETPEERNAME:
1381 err = sys_getpeername(a0, (struct sockaddr __user *)A(a1), (int __user *)A(a[2]));
1382 break;
1383 case SYS_SOCKETPAIR:
1384 err = sys_socketpair(a0,a1, a[2], (int __user *)A(a[3]));
1385 break;
1386 case SYS_SEND:
1387 err = sys_send(a0, (void __user *)A(a1), a[2], a[3]);
1388 break;
1389 case SYS_SENDTO:
1390 err = sys_sendto(a0,(void __user *)A(a1), a[2], a[3],
1391 (struct sockaddr __user *)A(a[4]), a[5]);
1392 break;
1393 case SYS_RECV:
1394 err = sys_recv(a0, (void __user *)A(a1), a[2], a[3]);
1395 break;
1396 case SYS_RECVFROM:
1397 err = sys_recvfrom(a0, (void __user *)A(a1), a[2], a[3],
1398 (struct sockaddr __user *)A(a[4]), (int __user *)A(a[5]));
1399 break;
1400 case SYS_SHUTDOWN:
1401 err = sys_shutdown(a0,a1);
1402 break;
1403 case SYS_SETSOCKOPT:
1404 err = sys_setsockopt(a0, a1, a[2], (char __user *)A(a[3]), a[4]);
1405 break;
1406 case SYS_GETSOCKOPT:
1407 err = sys_getsockopt(a0, a1, a[2], (char __user *)A(a[3]), (int __user *)A(a[4]));
1408 break;
1409 case SYS_SENDMSG:
1410 err = sys_sendmsg(a0, (struct msghdr __user *) A(a1), a[2]);
1411 break;
1412 case SYS_RECVMSG:
1413 err = sys_recvmsg(a0, (struct msghdr __user *) A(a1), a[2]);
1414 break;
1415 default:
1416 err = -EINVAL;
1417 break;
1418 }
1419 return err;
1420 }
x86 "subsystem" repository