2 * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
4 * Copyright (C) 2001 IBM
5 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
6 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
8 * These routines maintain argument size conversion between 32bit and 64bit
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
17 #include <linux/kernel.h>
18 #include <linux/sched.h>
21 #include <linux/file.h>
22 #include <linux/signal.h>
23 #include <linux/resource.h>
24 #include <linux/times.h>
25 #include <linux/utsname.h>
26 #include <linux/smp.h>
27 #include <linux/smp_lock.h>
28 #include <linux/sem.h>
29 #include <linux/msg.h>
30 #include <linux/shm.h>
31 #include <linux/poll.h>
32 #include <linux/personality.h>
33 #include <linux/stat.h>
34 #include <linux/mman.h>
36 #include <linux/syscalls.h>
37 #include <linux/unistd.h>
38 #include <linux/sysctl.h>
39 #include <linux/binfmts.h>
40 #include <linux/security.h>
41 #include <linux/compat.h>
42 #include <linux/ptrace.h>
43 #include <linux/elf.h>
44 #include <linux/ipc.h>
46 #include <asm/ptrace.h>
47 #include <asm/types.h>
48 #include <asm/uaccess.h>
49 #include <asm/unistd.h>
51 #include <asm/mmu_context.h>
52 #include <asm/ppc-pci.h>
53 #include <asm/syscalls.h>
56 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
57 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
61 return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
64 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
69 if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
70 !new_valid_dev(stat->rdev))
74 if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
77 err = access_ok(VERIFY_WRITE, statbuf, sizeof(*statbuf)) ? 0 : -EFAULT;
78 err |= __put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
79 err |= __put_user(ino, &statbuf->st_ino);
80 err |= __put_user(stat->mode, &statbuf->st_mode);
81 err |= __put_user(stat->nlink, &statbuf->st_nlink);
82 err |= __put_user(stat->uid, &statbuf->st_uid);
83 err |= __put_user(stat->gid, &statbuf->st_gid);
84 err |= __put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
85 err |= __put_user(stat->size, &statbuf->st_size);
86 err |= __put_user(stat->atime.tv_sec, &statbuf->st_atime);
87 err |= __put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
88 err |= __put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
89 err |= __put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
90 err |= __put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
91 err |= __put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
92 err |= __put_user(stat->blksize, &statbuf->st_blksize);
93 err |= __put_user(stat->blocks, &statbuf->st_blocks);
94 err |= __put_user(0, &statbuf->__unused4[0]);
95 err |= __put_user(0, &statbuf->__unused4[1]);
100 /* Note: it is necessary to treat option as an unsigned int,
101 * with the corresponding cast to a signed int to insure that the
102 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
103 * and the register representation of a signed int (msr in 64-bit mode) is performed.
105 asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
107 return sys_sysfs((int)option, arg1, arg2);
110 asmlinkage long compat_sys_pause(void)
112 current->state = TASK_INTERRUPTIBLE;
115 return -ERESTARTNOHAND;
118 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
122 if (!access_ok(VERIFY_READ, i, sizeof(*i)))
124 if (__get_user(o->tv_sec, &i->tv_sec))
126 if (__get_user(usec, &i->tv_usec))
128 o->tv_nsec = usec * 1000;
132 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
134 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
135 (__put_user(i->tv_sec, &o->tv_sec) |
136 __put_user(i->tv_usec, &o->tv_usec)));
142 /* Translations due to time_t size differences. Which affects all
143 sorts of things, like timeval and itimerval. */
144 extern struct timezone sys_tz;
146 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
150 do_gettimeofday(&ktv);
151 if (put_tv32(tv, &ktv))
155 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
164 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
170 if (get_ts32(&kts, tv))
174 if (copy_from_user(&ktz, tz, sizeof(ktz)))
178 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
181 #ifdef CONFIG_SYSVIPC
182 long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
187 version = call >> 16; /* hack for backward compatibility */
194 /* sign extend semid */
195 return compat_sys_semtimedop((int)first,
196 compat_ptr(ptr), second,
198 /* else fall through for normal semop() */
200 /* struct sembuf is the same on 32 and 64bit :)) */
201 /* sign extend semid */
202 return sys_semtimedop((int)first, compat_ptr(ptr), second,
205 /* sign extend key, nsems */
206 return sys_semget((int)first, (int)second, third);
208 /* sign extend semid, semnum */
209 return compat_sys_semctl((int)first, (int)second, third,
213 /* sign extend msqid */
214 return compat_sys_msgsnd((int)first, (int)second, third,
217 /* sign extend msqid, msgtyp */
218 return compat_sys_msgrcv((int)first, second, (int)fifth,
219 third, version, compat_ptr(ptr));
221 /* sign extend key */
222 return sys_msgget((int)first, second);
224 /* sign extend msqid */
225 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
228 /* sign extend shmid */
229 return compat_sys_shmat((int)first, second, third, version,
232 return sys_shmdt(compat_ptr(ptr));
234 /* sign extend key_t */
235 return sys_shmget((int)first, second, third);
237 /* sign extend shmid */
238 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
248 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
249 * with the corresponding cast to a signed int to insure that the
250 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
251 * and the register representation of a signed int (msr in 64-bit mode) is performed.
253 asmlinkage long compat_sys_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
255 mm_segment_t old_fs = get_fs();
260 if (offset && get_user(of, offset))
263 /* The __user pointer cast is valid because of the set_fs() */
265 up = offset ? (off_t __user *) &of : NULL;
266 ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
269 if (offset && put_user(of, offset))
275 asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
277 mm_segment_t old_fs = get_fs();
282 if (offset && get_user(lof, offset))
285 /* The __user pointer cast is valid because of the set_fs() */
287 up = offset ? (loff_t __user *) &lof : NULL;
288 ret = sys_sendfile64(out_fd, in_fd, up, count);
291 if (offset && put_user(lof, offset))
297 long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
298 unsigned long a3, unsigned long a4, unsigned long a5,
299 struct pt_regs *regs)
304 filename = getname((char __user *) a0);
305 error = PTR_ERR(filename);
306 if (IS_ERR(filename))
308 flush_fp_to_thread(current);
309 flush_altivec_to_thread(current);
311 error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
319 /* Note: it is necessary to treat option as an unsigned int,
320 * with the corresponding cast to a signed int to insure that the
321 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
322 * and the register representation of a signed int (msr in 64-bit mode) is performed.
324 asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
326 return sys_prctl((int)option,
327 (unsigned long) arg2,
328 (unsigned long) arg3,
329 (unsigned long) arg4,
330 (unsigned long) arg5);
333 /* Note: it is necessary to treat pid as an unsigned int,
334 * with the corresponding cast to a signed int to insure that the
335 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
336 * and the register representation of a signed int (msr in 64-bit mode) is performed.
338 asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
342 mm_segment_t old_fs = get_fs ();
344 /* The __user pointer cast is valid because of the set_fs() */
346 ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
348 if (put_compat_timespec(&t, interval))
353 /* Note: it is necessary to treat mode as an unsigned int,
354 * with the corresponding cast to a signed int to insure that the
355 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
356 * and the register representation of a signed int (msr in 64-bit mode) is performed.
358 asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
360 return sys_access(filename, (int)mode);
364 /* Note: it is necessary to treat mode as an unsigned int,
365 * with the corresponding cast to a signed int to insure that the
366 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
367 * and the register representation of a signed int (msr in 64-bit mode) is performed.
369 asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
371 return sys_creat(pathname, (int)mode);
375 /* Note: it is necessary to treat pid and options as unsigned ints,
376 * with the corresponding cast to a signed int to insure that the
377 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
378 * and the register representation of a signed int (msr in 64-bit mode) is performed.
380 asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
382 return sys_waitpid((int)pid, stat_addr, (int)options);
386 /* Note: it is necessary to treat gidsetsize as an unsigned int,
387 * with the corresponding cast to a signed int to insure that the
388 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
389 * and the register representation of a signed int (msr in 64-bit mode) is performed.
391 asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
393 return sys_getgroups((int)gidsetsize, grouplist);
397 /* Note: it is necessary to treat pid as an unsigned int,
398 * with the corresponding cast to a signed int to insure that the
399 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
400 * and the register representation of a signed int (msr in 64-bit mode) is performed.
402 asmlinkage long compat_sys_getpgid(u32 pid)
404 return sys_getpgid((int)pid);
409 /* Note: it is necessary to treat pid as an unsigned int,
410 * with the corresponding cast to a signed int to insure that the
411 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
412 * and the register representation of a signed int (msr in 64-bit mode) is performed.
414 asmlinkage long compat_sys_getsid(u32 pid)
416 return sys_getsid((int)pid);
420 /* Note: it is necessary to treat pid and sig as unsigned ints,
421 * with the corresponding cast to a signed int to insure that the
422 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
423 * and the register representation of a signed int (msr in 64-bit mode) is performed.
425 asmlinkage long compat_sys_kill(u32 pid, u32 sig)
427 return sys_kill((int)pid, (int)sig);
431 /* Note: it is necessary to treat mode as an unsigned int,
432 * with the corresponding cast to a signed int to insure that the
433 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
434 * and the register representation of a signed int (msr in 64-bit mode) is performed.
436 asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)
438 return sys_mkdir(pathname, (int)mode);
441 long compat_sys_nice(u32 increment)
443 /* sign extend increment */
444 return sys_nice((int)increment);
447 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
450 return sys_lseek(fd, (int)offset, origin);
453 /* Note: it is necessary to treat bufsiz as an unsigned int,
454 * with the corresponding cast to a signed int to insure that the
455 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
456 * and the register representation of a signed int (msr in 64-bit mode) is performed.
458 asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)
460 return sys_readlink(path, buf, (int)bufsiz);
463 /* Note: it is necessary to treat option as an unsigned int,
464 * with the corresponding cast to a signed int to insure that the
465 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
466 * and the register representation of a signed int (msr in 64-bit mode) is performed.
468 asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
470 return sys_sched_get_priority_max((int)policy);
474 /* Note: it is necessary to treat policy as an unsigned int,
475 * with the corresponding cast to a signed int to insure that the
476 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
477 * and the register representation of a signed int (msr in 64-bit mode) is performed.
479 asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
481 return sys_sched_get_priority_min((int)policy);
485 /* Note: it is necessary to treat pid as an unsigned int,
486 * with the corresponding cast to a signed int to insure that the
487 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
488 * and the register representation of a signed int (msr in 64-bit mode) is performed.
490 asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
492 return sys_sched_getparam((int)pid, param);
496 /* Note: it is necessary to treat pid as an unsigned int,
497 * with the corresponding cast to a signed int to insure that the
498 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
499 * and the register representation of a signed int (msr in 64-bit mode) is performed.
501 asmlinkage long compat_sys_sched_getscheduler(u32 pid)
503 return sys_sched_getscheduler((int)pid);
507 /* Note: it is necessary to treat pid as an unsigned int,
508 * with the corresponding cast to a signed int to insure that the
509 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
510 * and the register representation of a signed int (msr in 64-bit mode) is performed.
512 asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
514 return sys_sched_setparam((int)pid, param);
518 /* Note: it is necessary to treat pid and policy as unsigned ints,
519 * with the corresponding cast to a signed int to insure that the
520 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
521 * and the register representation of a signed int (msr in 64-bit mode) is performed.
523 asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
525 return sys_sched_setscheduler((int)pid, (int)policy, param);
529 /* Note: it is necessary to treat len as an unsigned int,
530 * with the corresponding cast to a signed int to insure that the
531 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
532 * and the register representation of a signed int (msr in 64-bit mode) is performed.
534 asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
536 return sys_setdomainname(name, (int)len);
540 /* Note: it is necessary to treat gidsetsize as an unsigned int,
541 * with the corresponding cast to a signed int to insure that the
542 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
543 * and the register representation of a signed int (msr in 64-bit mode) is performed.
545 asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
547 return sys_setgroups((int)gidsetsize, grouplist);
551 asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
553 /* sign extend len */
554 return sys_sethostname(name, (int)len);
558 /* Note: it is necessary to treat pid and pgid as unsigned ints,
559 * with the corresponding cast to a signed int to insure that the
560 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
561 * and the register representation of a signed int (msr in 64-bit mode) is performed.
563 asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
565 return sys_setpgid((int)pid, (int)pgid);
568 long compat_sys_getpriority(u32 which, u32 who)
570 /* sign extend which and who */
571 return sys_getpriority((int)which, (int)who);
574 long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
576 /* sign extend which, who and niceval */
577 return sys_setpriority((int)which, (int)who, (int)niceval);
580 long compat_sys_ioprio_get(u32 which, u32 who)
582 /* sign extend which and who */
583 return sys_ioprio_get((int)which, (int)who);
586 long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
588 /* sign extend which, who and ioprio */
589 return sys_ioprio_set((int)which, (int)who, (int)ioprio);
592 /* Note: it is necessary to treat newmask as an unsigned int,
593 * with the corresponding cast to a signed int to insure that the
594 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
595 * and the register representation of a signed int (msr in 64-bit mode) is performed.
597 asmlinkage long compat_sys_ssetmask(u32 newmask)
599 return sys_ssetmask((int) newmask);
602 asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
604 /* sign extend len */
605 return sys_syslog(type, buf, (int)len);
609 /* Note: it is necessary to treat mask as an unsigned int,
610 * with the corresponding cast to a signed int to insure that the
611 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
612 * and the register representation of a signed int (msr in 64-bit mode) is performed.
614 asmlinkage long compat_sys_umask(u32 mask)
616 return sys_umask((int)mask);
619 #ifdef CONFIG_SYSCTL_SYSCALL
620 struct __sysctl_args32 {
630 asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args)
632 struct __sysctl_args32 tmp;
635 size_t __user *oldlenp = NULL;
636 unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
638 if (copy_from_user(&tmp, args, sizeof(tmp)))
641 if (tmp.oldval && tmp.oldlenp) {
642 /* Duh, this is ugly and might not work if sysctl_args
643 is in read-only memory, but do_sysctl does indirectly
644 a lot of uaccess in both directions and we'd have to
645 basically copy the whole sysctl.c here, and
646 glibc's __sysctl uses rw memory for the structure
648 oldlenp = (size_t __user *)addr;
649 if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
650 put_user(oldlen, oldlenp))
655 error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
656 compat_ptr(tmp.oldval), oldlenp,
657 compat_ptr(tmp.newval), tmp.newlen);
661 if (get_user(oldlen, oldlenp) ||
662 put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
665 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
671 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
672 unsigned long prot, unsigned long flags,
673 unsigned long fd, unsigned long pgoff)
675 /* This should remain 12 even if PAGE_SIZE changes */
676 return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
679 long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
681 /* sign extend tgid, pid */
682 return sys_tgkill((int)tgid, (int)pid, sig);
687 * The 32 bit ABI passes long longs in an odd even register pair.
690 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
691 u32 reg6, u32 poshi, u32 poslo)
693 return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
696 compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
697 u32 reg6, u32 poshi, u32 poslo)
699 return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
702 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
704 return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
707 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
708 unsigned long high, unsigned long low)
710 return sys_truncate(path, (high << 32) | low);
713 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
714 u32 lenhi, u32 lenlo)
716 return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
717 ((loff_t)lenhi << 32) | lenlo);
720 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
723 return sys_ftruncate(fd, (high << 32) | low);
726 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
729 return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
733 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
734 size_t len, int advice)
736 return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
740 asmlinkage long compat_sys_add_key(const char __user *_type,
741 const char __user *_description,
742 const void __user *_payload,
746 return sys_add_key(_type, _description, _payload, plen, ringid);
749 asmlinkage long compat_sys_request_key(const char __user *_type,
750 const char __user *_description,
751 const char __user *_callout_info,
754 return sys_request_key(_type, _description, _callout_info, destringid);
757 asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
758 unsigned offset_hi, unsigned offset_lo,
759 unsigned nbytes_hi, unsigned nbytes_lo)
761 loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;
762 loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;
764 return sys_sync_file_range(fd, offset, nbytes, flags);