1 /* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
3 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
4 * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
6 * These routines maintain argument size conversion between 32bit and 64bit
10 #include <linux/kernel.h>
11 #include <linux/sched.h>
12 #include <linux/capability.h>
15 #include <linux/file.h>
16 #include <linux/signal.h>
17 #include <linux/resource.h>
18 #include <linux/times.h>
19 #include <linux/utsname.h>
20 #include <linux/smp.h>
21 #include <linux/smp_lock.h>
22 #include <linux/sem.h>
23 #include <linux/msg.h>
24 #include <linux/shm.h>
25 #include <linux/slab.h>
26 #include <linux/uio.h>
27 #include <linux/nfs_fs.h>
28 #include <linux/quota.h>
29 #include <linux/module.h>
30 #include <linux/sunrpc/svc.h>
31 #include <linux/nfsd/nfsd.h>
32 #include <linux/nfsd/cache.h>
33 #include <linux/nfsd/xdr.h>
34 #include <linux/nfsd/syscall.h>
35 #include <linux/poll.h>
36 #include <linux/personality.h>
37 #include <linux/stat.h>
38 #include <linux/filter.h>
39 #include <linux/highmem.h>
40 #include <linux/highuid.h>
41 #include <linux/mman.h>
42 #include <linux/ipv6.h>
44 #include <linux/icmpv6.h>
45 #include <linux/syscalls.h>
46 #include <linux/sysctl.h>
47 #include <linux/binfmts.h>
48 #include <linux/dnotify.h>
49 #include <linux/security.h>
50 #include <linux/compat.h>
51 #include <linux/vfs.h>
52 #include <linux/netfilter_ipv4/ip_tables.h>
53 #include <linux/ptrace.h>
55 #include <asm/types.h>
56 #include <asm/uaccess.h>
57 #include <asm/fpumacro.h>
58 #include <asm/mmu_context.h>
59 #include <asm/compat_signal.h>
61 /* 32-bit timeval and related flotsam. */
63 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
65 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
66 (__put_user(i->tv_sec, &o->tv_sec) |
67 __put_user(i->tv_usec, &o->tv_usec)));
71 asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth)
75 version = call >> 16; /* hack for backward compatibility */
81 /* sign extend semid */
82 return compat_sys_semtimedop((int)first,
83 compat_ptr(ptr), second,
85 /* else fall through for normal semop() */
87 /* struct sembuf is the same on 32 and 64bit :)) */
88 /* sign extend semid */
89 return sys_semtimedop((int)first, compat_ptr(ptr), second,
92 /* sign extend key, nsems */
93 return sys_semget((int)first, (int)second, third);
95 /* sign extend semid, semnum */
96 return compat_sys_semctl((int)first, (int)second, third,
100 /* sign extend msqid */
101 return compat_sys_msgsnd((int)first, (int)second, third,
104 /* sign extend msqid, msgtyp */
105 return compat_sys_msgrcv((int)first, second, (int)fifth,
106 third, version, compat_ptr(ptr));
108 /* sign extend key */
109 return sys_msgget((int)first, second);
111 /* sign extend msqid */
112 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
115 /* sign extend shmid */
116 return compat_sys_shmat((int)first, second, third, version,
119 return sys_shmdt(compat_ptr(ptr));
121 /* sign extend key_t */
122 return sys_shmget((int)first, second, third);
124 /* sign extend shmid */
125 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
135 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
140 return sys_truncate(path, (high << 32) | low);
143 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
148 return sys_ftruncate(fd, (high << 32) | low);
151 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
156 if (stat->size > MAX_NON_LFS || !old_valid_dev(stat->dev) ||
157 !old_valid_dev(stat->rdev))
161 if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
164 err = put_user(old_encode_dev(stat->dev), &statbuf->st_dev);
165 err |= put_user(stat->ino, &statbuf->st_ino);
166 err |= put_user(stat->mode, &statbuf->st_mode);
167 err |= put_user(stat->nlink, &statbuf->st_nlink);
168 err |= put_user(high2lowuid(stat->uid), &statbuf->st_uid);
169 err |= put_user(high2lowgid(stat->gid), &statbuf->st_gid);
170 err |= put_user(old_encode_dev(stat->rdev), &statbuf->st_rdev);
171 err |= put_user(stat->size, &statbuf->st_size);
172 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
173 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
174 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
175 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
176 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
177 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
178 err |= put_user(stat->blksize, &statbuf->st_blksize);
179 err |= put_user(stat->blocks, &statbuf->st_blocks);
180 err |= put_user(0, &statbuf->__unused4[0]);
181 err |= put_user(0, &statbuf->__unused4[1]);
186 static int cp_compat_stat64(struct kstat *stat,
187 struct compat_stat64 __user *statbuf)
191 err = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
192 err |= put_user(stat->ino, &statbuf->st_ino);
193 err |= put_user(stat->mode, &statbuf->st_mode);
194 err |= put_user(stat->nlink, &statbuf->st_nlink);
195 err |= put_user(stat->uid, &statbuf->st_uid);
196 err |= put_user(stat->gid, &statbuf->st_gid);
197 err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
198 err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
199 err |= put_user(stat->size, &statbuf->st_size);
200 err |= put_user(stat->blksize, &statbuf->st_blksize);
201 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
202 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
203 err |= put_user(stat->blocks, &statbuf->st_blocks);
204 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
205 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
206 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
207 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
208 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
209 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
210 err |= put_user(0, &statbuf->__unused4);
211 err |= put_user(0, &statbuf->__unused5);
216 asmlinkage long compat_sys_stat64(char __user * filename,
217 struct compat_stat64 __user *statbuf)
220 int error = vfs_stat(filename, &stat);
223 error = cp_compat_stat64(&stat, statbuf);
227 asmlinkage long compat_sys_lstat64(char __user * filename,
228 struct compat_stat64 __user *statbuf)
231 int error = vfs_lstat(filename, &stat);
234 error = cp_compat_stat64(&stat, statbuf);
238 asmlinkage long compat_sys_fstat64(unsigned int fd,
239 struct compat_stat64 __user * statbuf)
242 int error = vfs_fstat(fd, &stat);
245 error = cp_compat_stat64(&stat, statbuf);
249 asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename,
250 struct compat_stat64 __user * statbuf, int flag)
255 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
258 if (flag & AT_SYMLINK_NOFOLLOW)
259 error = vfs_lstat_fd(dfd, filename, &stat);
261 error = vfs_stat_fd(dfd, filename, &stat);
264 error = cp_compat_stat64(&stat, statbuf);
270 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
272 return sys_sysfs(option, arg1, arg2);
275 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
279 mm_segment_t old_fs = get_fs ();
282 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
284 if (put_compat_timespec(&t, interval))
289 asmlinkage long compat_sys_rt_sigprocmask(int how,
290 compat_sigset_t __user *set,
291 compat_sigset_t __user *oset,
292 compat_size_t sigsetsize)
297 mm_segment_t old_fs = get_fs();
300 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
302 switch (_NSIG_WORDS) {
303 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
304 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
305 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
306 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
310 ret = sys_rt_sigprocmask(how,
311 set ? (sigset_t __user *) &s : NULL,
312 oset ? (sigset_t __user *) &s : NULL,
317 switch (_NSIG_WORDS) {
318 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
319 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
320 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
321 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
323 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
329 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
330 compat_size_t sigsetsize)
335 mm_segment_t old_fs = get_fs();
338 ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
341 switch (_NSIG_WORDS) {
342 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
343 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
344 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
345 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
347 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
353 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
354 struct compat_siginfo __user *uinfo)
358 mm_segment_t old_fs = get_fs();
360 if (copy_siginfo_from_user32(&info, uinfo))
364 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
369 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
370 struct old_sigaction32 __user *oact)
372 struct k_sigaction new_ka, old_ka;
375 WARN_ON_ONCE(sig >= 0);
379 compat_old_sigset_t mask;
380 u32 u_handler, u_restorer;
382 ret = get_user(u_handler, &act->sa_handler);
383 new_ka.sa.sa_handler = compat_ptr(u_handler);
384 ret |= __get_user(u_restorer, &act->sa_restorer);
385 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
386 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
387 ret |= __get_user(mask, &act->sa_mask);
390 new_ka.ka_restorer = NULL;
391 siginitset(&new_ka.sa.sa_mask, mask);
394 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
397 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
398 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
399 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
400 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
406 asmlinkage long compat_sys_rt_sigaction(int sig,
407 struct sigaction32 __user *act,
408 struct sigaction32 __user *oact,
409 void __user *restorer,
410 compat_size_t sigsetsize)
412 struct k_sigaction new_ka, old_ka;
414 compat_sigset_t set32;
416 /* XXX: Don't preclude handling different sized sigset_t's. */
417 if (sigsetsize != sizeof(compat_sigset_t))
421 u32 u_handler, u_restorer;
423 new_ka.ka_restorer = restorer;
424 ret = get_user(u_handler, &act->sa_handler);
425 new_ka.sa.sa_handler = compat_ptr(u_handler);
426 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
427 switch (_NSIG_WORDS) {
428 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
429 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
430 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
431 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
433 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
434 ret |= __get_user(u_restorer, &act->sa_restorer);
435 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
440 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
443 switch (_NSIG_WORDS) {
444 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
445 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
446 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
447 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
449 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
450 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
451 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
452 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
461 * sparc32_execve() executes a new program after the asm stub has set
462 * things up for us. This should basically do what I want it to.
464 asmlinkage long sparc32_execve(struct pt_regs *regs)
469 /* User register window flush is done by entry.S */
471 /* Check for indirect call. */
472 if ((u32)regs->u_regs[UREG_G1] == 0)
475 filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
476 error = PTR_ERR(filename);
477 if (IS_ERR(filename))
480 error = compat_do_execve(filename,
481 compat_ptr(regs->u_regs[base + UREG_I1]),
482 compat_ptr(regs->u_regs[base + UREG_I2]), regs);
488 current_thread_info()->xfsr[0] = 0;
489 current_thread_info()->fpsaved[0] = 0;
490 regs->tstate &= ~TSTATE_PEF;
496 #ifdef CONFIG_MODULES
498 asmlinkage long sys32_init_module(void __user *umod, u32 len,
499 const char __user *uargs)
501 return sys_init_module(umod, len, uargs);
504 asmlinkage long sys32_delete_module(const char __user *name_user,
507 return sys_delete_module(name_user, flags);
510 #else /* CONFIG_MODULES */
512 asmlinkage long sys32_init_module(const char __user *name_user,
513 struct module __user *mod_user)
518 asmlinkage long sys32_delete_module(const char __user *name_user)
523 #endif /* CONFIG_MODULES */
525 /* Translations due to time_t size differences. Which affects all
526 sorts of things, like timeval and itimerval. */
528 extern struct timezone sys_tz;
530 asmlinkage long sys32_gettimeofday(struct compat_timeval __user *tv,
531 struct timezone __user *tz)
535 do_gettimeofday(&ktv);
536 if (put_tv32(tv, &ktv))
540 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
546 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
550 if (!access_ok(VERIFY_READ, i, sizeof(*i)))
552 if (__get_user(o->tv_sec, &i->tv_sec))
554 if (__get_user(usec, &i->tv_usec))
556 o->tv_nsec = usec * 1000;
560 asmlinkage long sys32_settimeofday(struct compat_timeval __user *tv,
561 struct timezone __user *tz)
567 if (get_ts32(&kts, tv))
571 if (copy_from_user(&ktz, tz, sizeof(ktz)))
575 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
578 /* These are here just in case some old sparc32 binary calls it. */
579 asmlinkage long sys32_pause(void)
581 current->state = TASK_INTERRUPTIBLE;
583 return -ERESTARTNOHAND;
586 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
592 return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
595 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
601 return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
604 asmlinkage long compat_sys_readahead(int fd,
609 return sys_readahead(fd, (offhi << 32) | offlo, count);
612 long compat_sys_fadvise64(int fd,
615 compat_size_t len, int advice)
617 return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
620 long compat_sys_fadvise64_64(int fd,
621 unsigned long offhi, unsigned long offlo,
622 unsigned long lenhi, unsigned long lenlo,
625 return sys_fadvise64_64(fd,
626 (offhi << 32) | offlo,
627 (lenhi << 32) | lenlo,
631 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
632 compat_off_t __user *offset,
635 mm_segment_t old_fs = get_fs();
639 if (offset && get_user(of, offset))
643 ret = sys_sendfile(out_fd, in_fd,
644 offset ? (off_t __user *) &of : NULL,
648 if (offset && put_user(of, offset))
654 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
655 compat_loff_t __user *offset,
658 mm_segment_t old_fs = get_fs();
662 if (offset && get_user(lof, offset))
666 ret = sys_sendfile64(out_fd, in_fd,
667 offset ? (loff_t __user *) &lof : NULL,
671 if (offset && put_user(lof, offset))
677 /* This is just a version for 32-bit applications which does
678 * not force O_LARGEFILE on.
681 asmlinkage long sparc32_open(const char __user *filename,
684 return do_sys_open(AT_FDCWD, filename, flags, mode);
687 extern unsigned long do_mremap(unsigned long addr,
688 unsigned long old_len, unsigned long new_len,
689 unsigned long flags, unsigned long new_addr);
691 asmlinkage unsigned long sys32_mremap(unsigned long addr,
692 unsigned long old_len, unsigned long new_len,
693 unsigned long flags, u32 __new_addr)
695 unsigned long ret = -EINVAL;
696 unsigned long new_addr = __new_addr;
698 if (unlikely(sparc_mmap_check(addr, old_len)))
700 if (unlikely(sparc_mmap_check(new_addr, new_len)))
702 down_write(¤t->mm->mmap_sem);
703 ret = do_mremap(addr, old_len, new_len, flags, new_addr);
704 up_write(¤t->mm->mmap_sem);
709 struct __sysctl_args32 {
719 asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
721 #ifndef CONFIG_SYSCTL_SYSCALL
724 struct __sysctl_args32 tmp;
726 size_t oldlen, __user *oldlenp = NULL;
727 unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
729 if (copy_from_user(&tmp, args, sizeof(tmp)))
732 if (tmp.oldval && tmp.oldlenp) {
733 /* Duh, this is ugly and might not work if sysctl_args
734 is in read-only memory, but do_sysctl does indirectly
735 a lot of uaccess in both directions and we'd have to
736 basically copy the whole sysctl.c here, and
737 glibc's __sysctl uses rw memory for the structure
739 if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) ||
740 put_user(oldlen, (size_t __user *)addr))
742 oldlenp = (size_t __user *)addr;
746 error = do_sysctl((int __user *)(unsigned long) tmp.name,
748 (void __user *)(unsigned long) tmp.oldval,
750 (void __user *)(unsigned long) tmp.newval,
755 if (get_user(oldlen, (size_t __user *)addr) ||
756 put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
759 if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
766 long sys32_lookup_dcookie(unsigned long cookie_high,
767 unsigned long cookie_low,
768 char __user *buf, size_t len)
770 return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
774 long compat_sync_file_range(int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, int flags)
776 return sys_sync_file_range(fd,
777 (off_high << 32) | off_low,
778 (nb_high << 32) | nb_low,
782 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
783 u32 lenhi, u32 lenlo)
785 return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
786 ((loff_t)lenhi << 32) | lenlo);