blob: d286f68a3d3a6a6257dce190054b5db570e80fce [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * sys_parisc32.c: Conversion between 32bit and 64bit native syscalls.
3 *
4 * Copyright (C) 2000-2001 Hewlett Packard Company
5 * Copyright (C) 2000 John Marvin
6 * Copyright (C) 2001 Matthew Wilcox
7 *
8 * These routines maintain argument size conversion between 32bit and 64bit
9 * environment. Based heavily on sys_ia32.c and sys_sparc32.c.
10 */
11
12#include <linux/config.h>
13#include <linux/compat.h>
14#include <linux/kernel.h>
15#include <linux/sched.h>
16#include <linux/fs.h>
17#include <linux/mm.h>
18#include <linux/file.h>
19#include <linux/signal.h>
20#include <linux/resource.h>
21#include <linux/times.h>
22#include <linux/utsname.h>
23#include <linux/time.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/smp.h>
25#include <linux/smp_lock.h>
26#include <linux/sem.h>
27#include <linux/msg.h>
28#include <linux/shm.h>
29#include <linux/slab.h>
30#include <linux/uio.h>
31#include <linux/nfs_fs.h>
32#include <linux/ncp_fs.h>
33#include <linux/sunrpc/svc.h>
34#include <linux/nfsd/nfsd.h>
35#include <linux/nfsd/cache.h>
36#include <linux/nfsd/xdr.h>
37#include <linux/nfsd/syscall.h>
38#include <linux/poll.h>
39#include <linux/personality.h>
40#include <linux/stat.h>
41#include <linux/highmem.h>
42#include <linux/highuid.h>
43#include <linux/mman.h>
44#include <linux/binfmts.h>
45#include <linux/namei.h>
46#include <linux/vfs.h>
47#include <linux/ptrace.h>
48#include <linux/swap.h>
49#include <linux/syscalls.h>
50
51#include <asm/types.h>
52#include <asm/uaccess.h>
53#include <asm/semaphore.h>
54#include <asm/mmu_context.h>
55
56#include "sys32.h"
57
58#undef DEBUG
59
60#ifdef DEBUG
61#define DBG(x) printk x
62#else
63#define DBG(x)
64#endif
65
66/*
67 * sys32_execve() executes a new program.
68 */
69
70asmlinkage int sys32_execve(struct pt_regs *regs)
71{
72 int error;
73 char *filename;
74
75 DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26]));
76 filename = getname((const char __user *) regs->gr[26]);
77 error = PTR_ERR(filename);
78 if (IS_ERR(filename))
79 goto out;
80 error = compat_do_execve(filename, compat_ptr(regs->gr[25]),
81 compat_ptr(regs->gr[24]), regs);
82 if (error == 0) {
83 task_lock(current);
84 current->ptrace &= ~PT_DTRACE;
85 task_unlock(current);
86 }
87 putname(filename);
88out:
89
90 return error;
91}
92
93asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
94 int r22, int r21, int r20)
95{
96 printk(KERN_ERR "%s(%d): Unimplemented 32 on 64 syscall #%d!\n",
97 current->comm, current->pid, r20);
98 return -ENOSYS;
99}
100
101#ifdef CONFIG_SYSCTL
102
103struct __sysctl_args32 {
104 u32 name;
105 int nlen;
106 u32 oldval;
107 u32 oldlenp;
108 u32 newval;
109 u32 newlen;
110 u32 __unused[4];
111};
112
113asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
114{
115 struct __sysctl_args32 tmp;
116 int error;
117 unsigned int oldlen32;
118 size_t oldlen, *oldlenp = NULL;
119 unsigned long addr = (((long __force)&args->__unused[0]) + 7) & ~7;
120 extern int do_sysctl(int *name, int nlen, void *oldval, size_t *oldlenp,
121 void *newval, size_t newlen);
122
123 DBG(("sysctl32(%p)\n", args));
124
125 if (copy_from_user(&tmp, args, sizeof(tmp)))
126 return -EFAULT;
127
128 if (tmp.oldval && tmp.oldlenp) {
129 /* Duh, this is ugly and might not work if sysctl_args
130 is in read-only memory, but do_sysctl does indirectly
131 a lot of uaccess in both directions and we'd have to
132 basically copy the whole sysctl.c here, and
133 glibc's __sysctl uses rw memory for the structure
134 anyway. */
135 /* a possibly better hack than this, which will avoid the
136 * problem if the struct is read only, is to push the
137 * 'oldlen' value out to the user's stack instead. -PB
138 */
139 if (get_user(oldlen32, (u32 *)(u64)tmp.oldlenp))
140 return -EFAULT;
141 oldlen = oldlen32;
142 if (put_user(oldlen, (size_t *)addr))
143 return -EFAULT;
144 oldlenp = (size_t *)addr;
145 }
146
147 lock_kernel();
148 error = do_sysctl((int *)(u64)tmp.name, tmp.nlen, (void *)(u64)tmp.oldval,
149 oldlenp, (void *)(u64)tmp.newval, tmp.newlen);
150 unlock_kernel();
151 if (oldlenp) {
152 if (!error) {
153 if (get_user(oldlen, (size_t *)addr)) {
154 error = -EFAULT;
155 } else {
156 oldlen32 = oldlen;
157 if (put_user(oldlen32, (u32 *)(u64)tmp.oldlenp))
158 error = -EFAULT;
159 }
160 }
161 if (copy_to_user(&args->__unused[0], tmp.__unused, sizeof(tmp.__unused)))
162 error = -EFAULT;
163 }
164 return error;
165}
166
167#endif /* CONFIG_SYSCTL */
168
169asmlinkage long sys32_sched_rr_get_interval(pid_t pid,
170 struct compat_timespec __user *interval)
171{
172 struct timespec t;
173 int ret;
174
175 KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, (struct timespec __user *)&t);
176 if (put_compat_timespec(&t, interval))
177 return -EFAULT;
178 return ret;
179}
180
181static int
182put_compat_timeval(struct compat_timeval __user *u, struct timeval *t)
183{
184 struct compat_timeval t32;
185 t32.tv_sec = t->tv_sec;
186 t32.tv_usec = t->tv_usec;
187 return copy_to_user(u, &t32, sizeof t32);
188}
189
190static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
191{
192 long usec;
193
194 if (__get_user(o->tv_sec, &i->tv_sec))
195 return -EFAULT;
196 if (__get_user(usec, &i->tv_usec))
197 return -EFAULT;
198 o->tv_nsec = usec * 1000;
199 return 0;
200}
201
202asmlinkage int
203sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
204{
205 extern void do_gettimeofday(struct timeval *tv);
206
207 if (tv) {
208 struct timeval ktv;
209 do_gettimeofday(&ktv);
210 if (put_compat_timeval(tv, &ktv))
211 return -EFAULT;
212 }
213 if (tz) {
214 extern struct timezone sys_tz;
215 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
216 return -EFAULT;
217 }
218 return 0;
219}
220
221asmlinkage
222int sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
223{
224 struct timespec kts;
225 struct timezone ktz;
226
227 if (tv) {
228 if (get_ts32(&kts, tv))
229 return -EFAULT;
230 }
231 if (tz) {
232 if (copy_from_user(&ktz, tz, sizeof(ktz)))
233 return -EFAULT;
234 }
235
236 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
237}
238
239int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
240{
241 int err;
242
243 if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
244 !new_valid_dev(stat->rdev))
245 return -EOVERFLOW;
246
247 err = put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
248 err |= put_user(stat->ino, &statbuf->st_ino);
249 err |= put_user(stat->mode, &statbuf->st_mode);
250 err |= put_user(stat->nlink, &statbuf->st_nlink);
251 err |= put_user(0, &statbuf->st_reserved1);
252 err |= put_user(0, &statbuf->st_reserved2);
253 err |= put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
254 err |= put_user(stat->size, &statbuf->st_size);
255 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
256 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
257 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
258 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
259 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
260 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
261 err |= put_user(stat->blksize, &statbuf->st_blksize);
262 err |= put_user(stat->blocks, &statbuf->st_blocks);
263 err |= put_user(0, &statbuf->__unused1);
264 err |= put_user(0, &statbuf->__unused2);
265 err |= put_user(0, &statbuf->__unused3);
266 err |= put_user(0, &statbuf->__unused4);
267 err |= put_user(0, &statbuf->__unused5);
268 err |= put_user(0, &statbuf->st_fstype); /* not avail */
269 err |= put_user(0, &statbuf->st_realdev); /* not avail */
270 err |= put_user(0, &statbuf->st_basemode); /* not avail */
271 err |= put_user(0, &statbuf->st_spareshort);
272 err |= put_user(stat->uid, &statbuf->st_uid);
273 err |= put_user(stat->gid, &statbuf->st_gid);
274 err |= put_user(0, &statbuf->st_spare4[0]);
275 err |= put_user(0, &statbuf->st_spare4[1]);
276 err |= put_user(0, &statbuf->st_spare4[2]);
277
278 return err;
279}
280
281struct linux32_dirent {
282 u32 d_ino;
283 compat_off_t d_off;
284 u16 d_reclen;
285 char d_name[1];
286};
287
288struct old_linux32_dirent {
289 u32 d_ino;
290 u32 d_offset;
291 u16 d_namlen;
292 char d_name[1];
293};
294
295struct getdents32_callback {
296 struct linux32_dirent __user * current_dir;
297 struct linux32_dirent __user * previous;
298 int count;
299 int error;
300};
301
302struct readdir32_callback {
303 struct old_linux32_dirent __user * dirent;
304 int count;
305};
306
307#define ROUND_UP(x,a) ((__typeof__(x))(((unsigned long)(x) + ((a) - 1)) & ~((a) - 1)))
308#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
309static int
310filldir32 (void *__buf, const char *name, int namlen, loff_t offset, ino_t ino,
311 unsigned int d_type)
312{
313 struct linux32_dirent __user * dirent;
314 struct getdents32_callback * buf = (struct getdents32_callback *) __buf;
315 int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1, 4);
316
317 buf->error = -EINVAL; /* only used if we fail.. */
318 if (reclen > buf->count)
319 return -EINVAL;
320 dirent = buf->previous;
321 if (dirent)
322 put_user(offset, &dirent->d_off);
323 dirent = buf->current_dir;
324 buf->previous = dirent;
325 put_user(ino, &dirent->d_ino);
326 put_user(reclen, &dirent->d_reclen);
327 copy_to_user(dirent->d_name, name, namlen);
328 put_user(0, dirent->d_name + namlen);
329 dirent = ((void __user *)dirent) + reclen;
330 buf->current_dir = dirent;
331 buf->count -= reclen;
332 return 0;
333}
334
335asmlinkage long
336sys32_getdents (unsigned int fd, void __user * dirent, unsigned int count)
337{
338 struct file * file;
339 struct linux32_dirent __user * lastdirent;
340 struct getdents32_callback buf;
341 int error;
342
343 error = -EBADF;
344 file = fget(fd);
345 if (!file)
346 goto out;
347
348 buf.current_dir = (struct linux32_dirent __user *) dirent;
349 buf.previous = NULL;
350 buf.count = count;
351 buf.error = 0;
352
353 error = vfs_readdir(file, filldir32, &buf);
354 if (error < 0)
355 goto out_putf;
356 error = buf.error;
357 lastdirent = buf.previous;
358 if (lastdirent) {
359 put_user(file->f_pos, &lastdirent->d_off);
360 error = count - buf.count;
361 }
362
363out_putf:
364 fput(file);
365out:
366 return error;
367}
368
369static int
370fillonedir32 (void * __buf, const char * name, int namlen, loff_t offset, ino_t ino,
371 unsigned int d_type)
372{
373 struct readdir32_callback * buf = (struct readdir32_callback *) __buf;
374 struct old_linux32_dirent __user * dirent;
375
376 if (buf->count)
377 return -EINVAL;
378 buf->count++;
379 dirent = buf->dirent;
380 put_user(ino, &dirent->d_ino);
381 put_user(offset, &dirent->d_offset);
382 put_user(namlen, &dirent->d_namlen);
383 copy_to_user(dirent->d_name, name, namlen);
384 put_user(0, dirent->d_name + namlen);
385 return 0;
386}
387
388asmlinkage long
389sys32_readdir (unsigned int fd, void __user * dirent, unsigned int count)
390{
391 int error;
392 struct file * file;
393 struct readdir32_callback buf;
394
395 error = -EBADF;
396 file = fget(fd);
397 if (!file)
398 goto out;
399
400 buf.count = 0;
401 buf.dirent = dirent;
402
403 error = vfs_readdir(file, fillonedir32, &buf);
404 if (error >= 0)
405 error = buf.count;
406 fput(file);
407out:
408 return error;
409}
410
411/*** copied from mips64 ***/
412/*
413 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
414 * 64-bit unsigned longs.
415 */
416
417static inline int
418get_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset)
419{
420 n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32));
421 if (ufdset) {
422 unsigned long odd;
423
424 if (!access_ok(VERIFY_WRITE, ufdset, n*sizeof(u32)))
425 return -EFAULT;
426
427 odd = n & 1UL;
428 n &= ~1UL;
429 while (n) {
430 unsigned long h, l;
431 __get_user(l, ufdset);
432 __get_user(h, ufdset+1);
433 ufdset += 2;
434 *fdset++ = h << 32 | l;
435 n -= 2;
436 }
437 if (odd)
438 __get_user(*fdset, ufdset);
439 } else {
440 /* Tricky, must clear full unsigned long in the
441 * kernel fdset at the end, this makes sure that
442 * actually happens.
443 */
444 memset(fdset, 0, ((n + 1) & ~1)*sizeof(u32));
445 }
446 return 0;
447}
448
449static inline void
450set_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset)
451{
452 unsigned long odd;
453 n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32));
454
455 if (!ufdset)
456 return;
457
458 odd = n & 1UL;
459 n &= ~1UL;
460 while (n) {
461 unsigned long h, l;
462 l = *fdset++;
463 h = l >> 32;
464 __put_user(l, ufdset);
465 __put_user(h, ufdset+1);
466 ufdset += 2;
467 n -= 2;
468 }
469 if (odd)
470 __put_user(*fdset, ufdset);
471}
472
473struct msgbuf32 {
474 int mtype;
475 char mtext[1];
476};
477
478asmlinkage long sys32_msgsnd(int msqid,
479 struct msgbuf32 __user *umsgp32,
480 size_t msgsz, int msgflg)
481{
482 struct msgbuf *mb;
483 struct msgbuf32 mb32;
484 int err;
485
486 if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
487 return -ENOMEM;
488
489 err = get_user(mb32.mtype, &umsgp32->mtype);
490 mb->mtype = mb32.mtype;
491 err |= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz);
492
493 if (err)
494 err = -EFAULT;
495 else
496 KERNEL_SYSCALL(err, sys_msgsnd, msqid, (struct msgbuf __user *)mb, msgsz, msgflg);
497
498 kfree(mb);
499 return err;
500}
501
502asmlinkage long sys32_msgrcv(int msqid,
503 struct msgbuf32 __user *umsgp32,
504 size_t msgsz, long msgtyp, int msgflg)
505{
506 struct msgbuf *mb;
507 struct msgbuf32 mb32;
508 int err, len;
509
510 if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
511 return -ENOMEM;
512
513 KERNEL_SYSCALL(err, sys_msgrcv, msqid, (struct msgbuf __user *)mb, msgsz, msgtyp, msgflg);
514
515 if (err >= 0) {
516 len = err;
517 mb32.mtype = mb->mtype;
518 err = put_user(mb32.mtype, &umsgp32->mtype);
519 err |= copy_to_user(&umsgp32->mtext, mb->mtext, len);
520 if (err)
521 err = -EFAULT;
522 else
523 err = len;
524 }
525
526 kfree(mb);
527 return err;
528}
529
530asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
531{
532 mm_segment_t old_fs = get_fs();
533 int ret;
534 off_t of;
535
536 if (offset && get_user(of, offset))
537 return -EFAULT;
538
539 set_fs(KERNEL_DS);
540 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
541 set_fs(old_fs);
542
543 if (offset && put_user(of, offset))
544 return -EFAULT;
545
546 return ret;
547}
548
549asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
550{
551 mm_segment_t old_fs = get_fs();
552 int ret;
553 loff_t lof;
554
555 if (offset && get_user(lof, offset))
556 return -EFAULT;
557
558 set_fs(KERNEL_DS);
559 ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count);
560 set_fs(old_fs);
561
562 if (offset && put_user(lof, offset))
563 return -EFAULT;
564
565 return ret;
566}
567
568
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569struct sysinfo32 {
570 s32 uptime;
571 u32 loads[3];
572 u32 totalram;
573 u32 freeram;
574 u32 sharedram;
575 u32 bufferram;
576 u32 totalswap;
577 u32 freeswap;
578 unsigned short procs;
579 u32 totalhigh;
580 u32 freehigh;
581 u32 mem_unit;
582 char _f[12];
583};
584
585/* We used to call sys_sysinfo and translate the result. But sys_sysinfo
586 * undoes the good work done elsewhere, and rather than undoing the
587 * damage, I decided to just duplicate the code from sys_sysinfo here.
588 */
589
590asmlinkage int sys32_sysinfo(struct sysinfo32 __user *info)
591{
592 struct sysinfo val;
593 int err;
594 unsigned long seq;
595
596 /* We don't need a memset here because we copy the
597 * struct to userspace once element at a time.
598 */
599
600 do {
601 seq = read_seqbegin(&xtime_lock);
602 val.uptime = jiffies / HZ;
603
604 val.loads[0] = avenrun[0] << (SI_LOAD_SHIFT - FSHIFT);
605 val.loads[1] = avenrun[1] << (SI_LOAD_SHIFT - FSHIFT);
606 val.loads[2] = avenrun[2] << (SI_LOAD_SHIFT - FSHIFT);
607
608 val.procs = nr_threads;
609 } while (read_seqretry(&xtime_lock, seq));
610
611
612 si_meminfo(&val);
613 si_swapinfo(&val);
614
615 err = put_user (val.uptime, &info->uptime);
616 err |= __put_user (val.loads[0], &info->loads[0]);
617 err |= __put_user (val.loads[1], &info->loads[1]);
618 err |= __put_user (val.loads[2], &info->loads[2]);
619 err |= __put_user (val.totalram, &info->totalram);
620 err |= __put_user (val.freeram, &info->freeram);
621 err |= __put_user (val.sharedram, &info->sharedram);
622 err |= __put_user (val.bufferram, &info->bufferram);
623 err |= __put_user (val.totalswap, &info->totalswap);
624 err |= __put_user (val.freeswap, &info->freeswap);
625 err |= __put_user (val.procs, &info->procs);
626 err |= __put_user (val.totalhigh, &info->totalhigh);
627 err |= __put_user (val.freehigh, &info->freehigh);
628 err |= __put_user (val.mem_unit, &info->mem_unit);
629 return err ? -EFAULT : 0;
630}
631
632
633/* lseek() needs a wrapper because 'offset' can be negative, but the top
634 * half of the argument has been zeroed by syscall.S.
635 */
636
637asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin)
638{
639 return sys_lseek(fd, offset, origin);
640}
641
642asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg)
643{
644 union semun u;
645
646 if (cmd == SETVAL) {
647 /* Ugh. arg is a union of int,ptr,ptr,ptr, so is 8 bytes.
648 * The int should be in the first 4, but our argument
649 * frobbing has left it in the last 4.
650 */
651 u.val = *((int *)&arg + 1);
652 return sys_semctl (semid, semnum, cmd, u);
653 }
654 return sys_semctl (semid, semnum, cmd, arg);
655}
656
657long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
658 size_t len)
659{
660 return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
661 buf, len);
662}