blob: 2fefb14414b7db6db1dbfd4b58719082197439ba [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#include <linux/compiler.h>
9#include <linux/mm.h>
10#include <linux/errno.h>
11#include <linux/file.h>
12#include <linux/smp_lock.h>
13#include <linux/highuid.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/resource.h>
15#include <linux/highmem.h>
16#include <linux/time.h>
17#include <linux/times.h>
18#include <linux/poll.h>
19#include <linux/slab.h>
20#include <linux/skbuff.h>
21#include <linux/filter.h>
22#include <linux/shm.h>
23#include <linux/sem.h>
24#include <linux/msg.h>
25#include <linux/icmpv6.h>
26#include <linux/syscalls.h>
27#include <linux/sysctl.h>
28#include <linux/utime.h>
29#include <linux/utsname.h>
30#include <linux/personality.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/dnotify.h>
32#include <linux/module.h>
33#include <linux/binfmts.h>
34#include <linux/security.h>
35#include <linux/compat.h>
36#include <linux/vfs.h>
Adrian Bunkcba4fbb2007-10-16 23:29:24 -070037#include <linux/ipc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
39#include <net/sock.h>
40#include <net/scm.h>
41
Ralf Baechle431dc802007-02-13 00:05:11 +000042#include <asm/compat-signal.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <asm/sim.h>
44#include <asm/uaccess.h>
45#include <asm/mmu_context.h>
46#include <asm/mman.h>
47
48/* Use this to get at 32-bit user passed pointers. */
49/* A() macro should be used for places where you e.g.
50 have some internal variable u32 and just want to get
51 rid of a compiler warning. AA() has to be used in
52 places where you want to convert a function argument
53 to 32bit pointer or when you e.g. access pt_regs
54 structure and want to consider 32bit registers only.
55 */
56#define A(__x) ((unsigned long)(__x))
57#define AA(__x) ((unsigned long)((int)__x))
58
59#ifdef __MIPSEB__
Ralf Baechle21a151d2007-10-11 23:46:15 +010060#define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#endif
62#ifdef __MIPSEL__
Ralf Baechle21a151d2007-10-11 23:46:15 +010063#define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
Linus Torvalds1da177e2005-04-16 15:20:36 -070064#endif
65
66/*
67 * Revalidate the inode. This is required for proper NFS attribute caching.
68 */
69
Atsushi Nemoto219ac732006-02-21 16:05:11 +090070int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
Linus Torvalds1da177e2005-04-16 15:20:36 -070071{
72 struct compat_stat tmp;
73
74 if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev))
75 return -EOVERFLOW;
76
77 memset(&tmp, 0, sizeof(tmp));
78 tmp.st_dev = new_encode_dev(stat->dev);
79 tmp.st_ino = stat->ino;
David Howellsafefdbb2006-10-03 01:13:46 -070080 if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)
81 return -EOVERFLOW;
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 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;
Ralf Baechle21a151d2007-10-11 23:46:15 +010098 return copy_to_user(statbuf, &tmp, sizeof(tmp)) ? -EFAULT : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099}
100
101asmlinkage unsigned long
102sys32_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;
H. Peter Anvin947df172006-02-24 21:20:29 -0800109 if (pgoff & (~PAGE_MASK >> 12))
110 goto out;
111 pgoff >>= PAGE_SHIFT-12;
112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 if (!(flags & MAP_ANONYMOUS)) {
114 error = -EBADF;
115 file = fget(fd);
116 if (!file)
117 goto out;
118 }
119 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
120
121 down_write(&current->mm->mmap_sem);
122 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
123 up_write(&current->mm->mmap_sem);
124 if (file)
125 fput(file);
126
127out:
128 return error;
129}
130
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131/*
132 * sys_execve() executes a new program.
133 */
134asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
135{
136 int error;
137 char * filename;
138
139 filename = getname(compat_ptr(regs.regs[4]));
140 error = PTR_ERR(filename);
141 if (IS_ERR(filename))
142 goto out;
143 error = compat_do_execve(filename, compat_ptr(regs.regs[5]),
144 compat_ptr(regs.regs[6]), &regs);
145 putname(filename);
146
147out:
148 return error;
149}
150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151#define RLIM_INFINITY32 0x7fffffff
152#define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
153
154struct rlimit32 {
155 int rlim_cur;
156 int rlim_max;
157};
158
Ralf Baechled4e9cff2008-01-29 10:15:02 +0000159asmlinkage long sys32_truncate64(const char __user * path,
160 unsigned long __dummy, int a2, int a3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161{
Ralf Baechled4e9cff2008-01-29 10:15:02 +0000162 return sys_truncate(path, merge_64(a2, a3));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163}
164
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
Ralf Baechled4e9cff2008-01-29 10:15:02 +0000166 int a2, int a3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167{
Ralf Baechled4e9cff2008-01-29 10:15:02 +0000168 return sys_ftruncate(fd, merge_64(a2, a3));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169}
170
171static inline long
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900172get_tv32(struct timeval *o, struct compat_timeval __user *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173{
174 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
175 (__get_user(o->tv_sec, &i->tv_sec) |
176 __get_user(o->tv_usec, &i->tv_usec)));
177}
178
179static inline long
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900180put_tv32(struct compat_timeval __user *o, struct timeval *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181{
182 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
183 (__put_user(i->tv_sec, &o->tv_sec) |
184 __put_user(i->tv_usec, &o->tv_usec)));
185}
186
187extern struct timezone sys_tz;
188
189asmlinkage int
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900190sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191{
192 if (tv) {
193 struct timeval ktv;
194 do_gettimeofday(&ktv);
195 if (put_tv32(tv, &ktv))
196 return -EFAULT;
197 }
198 if (tz) {
199 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
200 return -EFAULT;
201 }
202 return 0;
203}
204
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900205static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206{
207 long usec;
208
209 if (!access_ok(VERIFY_READ, i, sizeof(*i)))
210 return -EFAULT;
211 if (__get_user(o->tv_sec, &i->tv_sec))
212 return -EFAULT;
213 if (__get_user(usec, &i->tv_usec))
214 return -EFAULT;
215 o->tv_nsec = usec * 1000;
216 return 0;
217}
218
219asmlinkage int
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900220sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221{
222 struct timespec kts;
223 struct timezone ktz;
224
225 if (tv) {
226 if (get_ts32(&kts, tv))
227 return -EFAULT;
228 }
229 if (tz) {
230 if (copy_from_user(&ktz, tz, sizeof(ktz)))
231 return -EFAULT;
232 }
233
234 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
235}
236
237asmlinkage int sys32_llseek(unsigned int fd, unsigned int offset_high,
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900238 unsigned int offset_low, loff_t __user * result,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 unsigned int origin)
240{
241 return sys_llseek(fd, offset_high, offset_low, result, origin);
242}
243
244/* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
245 lseek back to original location. They fail just like lseek does on
246 non-seekable files. */
247
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900248asmlinkage ssize_t sys32_pread(unsigned int fd, char __user * buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 size_t count, u32 unused, u64 a4, u64 a5)
250{
Al Viro6ad00132006-04-26 07:28:09 +0100251 return sys_pread64(fd, buf, count, merge_64(a4, a5));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252}
253
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900254asmlinkage ssize_t sys32_pwrite(unsigned int fd, const char __user * buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 size_t count, u32 unused, u64 a4, u64 a5)
256{
Al Viro6ad00132006-04-26 07:28:09 +0100257 return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258}
259
260asmlinkage int sys32_sched_rr_get_interval(compat_pid_t pid,
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900261 struct compat_timespec __user *interval)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262{
263 struct timespec t;
264 int ret;
Ralf Baechle49a89ef2007-10-11 23:46:15 +0100265 mm_segment_t old_fs = get_fs();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
Ralf Baechle49a89ef2007-10-11 23:46:15 +0100267 set_fs(KERNEL_DS);
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900268 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
Ralf Baechle49a89ef2007-10-11 23:46:15 +0100269 set_fs(old_fs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 if (put_user (t.tv_sec, &interval->tv_sec) ||
Ralf Baechle49a89ef2007-10-11 23:46:15 +0100271 __put_user(t.tv_nsec, &interval->tv_nsec))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 return -EFAULT;
273 return ret;
274}
275
Ralf Baechle65f8ebe2007-03-10 18:22:25 +0000276#ifdef CONFIG_SYSVIPC
277
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278asmlinkage long
Ralf Baechle49a89ef2007-10-11 23:46:15 +0100279sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280{
281 int version, err;
282
283 version = call >> 16; /* hack for backward compatibility */
284 call &= 0xffff;
285
286 switch (call) {
287 case SEMOP:
288 /* struct sembuf is the same on 32 and 64bit :)) */
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900289 err = sys_semtimedop(first, compat_ptr(ptr), second, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 break;
291 case SEMTIMEDOP:
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900292 err = compat_sys_semtimedop(first, compat_ptr(ptr), second,
293 compat_ptr(fifth));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 break;
295 case SEMGET:
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900296 err = sys_semget(first, second, third);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 break;
298 case SEMCTL:
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900299 err = compat_sys_semctl(first, second, third, compat_ptr(ptr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 case MSGSND:
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900302 err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 break;
304 case MSGRCV:
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900305 err = compat_sys_msgrcv(first, second, fifth, third,
306 version, compat_ptr(ptr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 break;
308 case MSGGET:
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900309 err = sys_msgget((key_t) first, second);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 break;
311 case MSGCTL:
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900312 err = compat_sys_msgctl(first, second, compat_ptr(ptr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 case SHMAT:
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900315 err = compat_sys_shmat(first, second, third, version,
316 compat_ptr(ptr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 break;
318 case SHMDT:
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900319 err = sys_shmdt(compat_ptr(ptr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 break;
321 case SHMGET:
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900322 err = sys_shmget(first, (unsigned)second, third);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 break;
324 case SHMCTL:
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900325 err = compat_sys_shmctl(first, second, compat_ptr(ptr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 break;
327 default:
328 err = -EINVAL;
329 break;
330 }
331
332 return err;
333}
334
Ralf Baechle65f8ebe2007-03-10 18:22:25 +0000335#else
336
337asmlinkage long
Ralf Baechle49a89ef2007-10-11 23:46:15 +0100338sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
Ralf Baechle65f8ebe2007-03-10 18:22:25 +0000339{
340 return -ENOSYS;
341}
342
343#endif /* CONFIG_SYSVIPC */
344
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900345#ifdef CONFIG_MIPS32_N32
Atsushi Nemotoe16d8df2007-01-10 18:53:33 +0900346asmlinkage long sysn32_semctl(int semid, int semnum, int cmd, u32 arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347{
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900348 /* compat_sys_semctl expects a pointer to union semun */
349 u32 __user *uptr = compat_alloc_user_space(sizeof(u32));
Atsushi Nemotoe16d8df2007-01-10 18:53:33 +0900350 if (put_user(arg, uptr))
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900351 return -EFAULT;
352 return compat_sys_semctl(semid, semnum, cmd, uptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353}
Atsushi Nemotoe16d8df2007-01-10 18:53:33 +0900354
355asmlinkage long sysn32_msgsnd(int msqid, u32 msgp, unsigned msgsz, int msgflg)
356{
357 return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp));
358}
359
360asmlinkage long sysn32_msgrcv(int msqid, u32 msgp, size_t msgsz, int msgtyp,
361 int msgflg)
362{
363 return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64,
364 compat_ptr(msgp));
365}
Atsushi Nemoto05e43962006-11-07 18:02:44 +0900366#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367
368struct sysctl_args32
369{
370 compat_caddr_t name;
371 int nlen;
372 compat_caddr_t oldval;
373 compat_caddr_t oldlenp;
374 compat_caddr_t newval;
375 compat_size_t newlen;
376 unsigned int __unused[4];
377};
378
Eric W. Biedermanb89a8172006-09-27 01:51:04 -0700379#ifdef CONFIG_SYSCTL_SYSCALL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900381asmlinkage long sys32_sysctl(struct sysctl_args32 __user *args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382{
383 struct sysctl_args32 tmp;
384 int error;
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900385 size_t oldlen;
386 size_t __user *oldlenp = NULL;
387 unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
389 if (copy_from_user(&tmp, args, sizeof(tmp)))
390 return -EFAULT;
391
392 if (tmp.oldval && tmp.oldlenp) {
393 /* Duh, this is ugly and might not work if sysctl_args
394 is in read-only memory, but do_sysctl does indirectly
395 a lot of uaccess in both directions and we'd have to
396 basically copy the whole sysctl.c here, and
397 glibc's __sysctl uses rw memory for the structure
398 anyway. */
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900399 if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) ||
400 put_user(oldlen, (size_t __user *)addr))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 return -EFAULT;
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900402 oldlenp = (size_t __user *)addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 }
404
405 lock_kernel();
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900406 error = do_sysctl((int __user *)A(tmp.name), tmp.nlen, (void __user *)A(tmp.oldval),
407 oldlenp, (void __user *)A(tmp.newval), tmp.newlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 unlock_kernel();
409 if (oldlenp) {
410 if (!error) {
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900411 if (get_user(oldlen, (size_t __user *)addr) ||
412 put_user(oldlen, (u32 __user *)A(tmp.oldlenp)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 error = -EFAULT;
414 }
415 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
416 }
417 return error;
418}
419
Eric W. Biedermanb89a8172006-09-27 01:51:04 -0700420#endif /* CONFIG_SYSCTL_SYSCALL */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900422asmlinkage long sys32_newuname(struct new_utsname __user * name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423{
424 int ret = 0;
425
426 down_read(&uts_sem);
Serge E. Hallyne9ff3992006-10-02 02:18:11 -0700427 if (copy_to_user(name, utsname(), sizeof *name))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 ret = -EFAULT;
429 up_read(&uts_sem);
430
431 if (current->personality == PER_LINUX32 && !ret)
432 if (copy_to_user(name->machine, "mips\0\0\0", 8))
433 ret = -EFAULT;
434
435 return ret;
436}
437
438asmlinkage int sys32_personality(unsigned long personality)
439{
440 int ret;
Thiemo Seufer53571ce2006-08-13 00:53:29 +0100441 personality &= 0xffffffff;
442 if (personality(current->personality) == PER_LINUX32 &&
443 personality == PER_LINUX)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 personality = PER_LINUX32;
445 ret = sys_personality(personality);
446 if (ret == PER_LINUX32)
447 ret = PER_LINUX;
448 return ret;
449}
450
451/* ustat compatibility */
452struct ustat32 {
453 compat_daddr_t f_tfree;
454 compat_ino_t f_tinode;
455 char f_fname[6];
456 char f_fpack[6];
457};
458
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900459extern asmlinkage long sys_ustat(dev_t dev, struct ustat __user * ubuf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900461asmlinkage int sys32_ustat(dev_t dev, struct ustat32 __user * ubuf32)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462{
463 int err;
Ralf Baechlee0daad42007-02-05 00:10:11 +0000464 struct ustat tmp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 struct ustat32 tmp32;
466 mm_segment_t old_fs = get_fs();
467
468 set_fs(KERNEL_DS);
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900469 err = sys_ustat(dev, (struct ustat __user *)&tmp);
Ralf Baechle49a89ef2007-10-11 23:46:15 +0100470 set_fs(old_fs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
472 if (err)
473 goto out;
474
Ralf Baechle21a151d2007-10-11 23:46:15 +0100475 memset(&tmp32, 0, sizeof(struct ustat32));
Ralf Baechlee0daad42007-02-05 00:10:11 +0000476 tmp32.f_tfree = tmp.f_tfree;
477 tmp32.f_tinode = tmp.f_tinode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
Ralf Baechle21a151d2007-10-11 23:46:15 +0100479 err = copy_to_user(ubuf32, &tmp32, sizeof(struct ustat32)) ? -EFAULT : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
481out:
482 return err;
483}
484
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900485asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 s32 count)
487{
488 mm_segment_t old_fs = get_fs();
489 int ret;
490 off_t of;
Ralf Baechle42a3b4f2005-09-03 15:56:17 -0700491
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 if (offset && get_user(of, offset))
493 return -EFAULT;
Ralf Baechle42a3b4f2005-09-03 15:56:17 -0700494
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 set_fs(KERNEL_DS);
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900496 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 set_fs(old_fs);
Ralf Baechle42a3b4f2005-09-03 15:56:17 -0700498
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 if (offset && put_user(of, offset))
500 return -EFAULT;
Ralf Baechle42a3b4f2005-09-03 15:56:17 -0700501
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 return ret;
503}
504
505asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
506 size_t count)
507{
508 return sys_readahead(fd, merge_64(a2, a3), count);
509}
510
Ralf Baechlea8d587a2006-04-01 07:49:21 +0100511asmlinkage long sys32_sync_file_range(int fd, int __pad,
512 unsigned long a2, unsigned long a3,
513 unsigned long a4, unsigned long a5,
514 int flags)
515{
516 return sys_sync_file_range(fd,
517 merge_64(a2, a3), merge_64(a4, a5),
518 flags);
519}
520
Atsushi Nemoto8676d2e2007-05-18 00:46:13 +0900521asmlinkage long sys32_fadvise64_64(int fd, int __pad,
522 unsigned long a2, unsigned long a3,
523 unsigned long a4, unsigned long a5,
524 int flags)
525{
526 return sys_fadvise64_64(fd,
527 merge_64(a2, a3), merge_64(a4, a5),
528 flags);
529}
530
Ralf Baechle4dc46772007-07-26 03:38:24 +0100531asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
532 unsigned offset_a3, unsigned len_a4, unsigned len_a5)
533{
534 return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
535 merge_64(len_a4, len_a5));
536}
537
Ralf Baechle3c370262005-04-13 17:43:59 +0000538save_static_function(sys32_clone);
David Rientjesf5dbeaf2007-07-22 01:01:39 -0700539static int noinline __used
Ralf Baechle3c370262005-04-13 17:43:59 +0000540_sys32_clone(nabi_no_regargs struct pt_regs regs)
541{
542 unsigned long clone_flags;
543 unsigned long newsp;
544 int __user *parent_tidptr, *child_tidptr;
545
546 clone_flags = regs.regs[4];
547 newsp = regs.regs[5];
548 if (!newsp)
549 newsp = regs.regs[29];
Atsushi Nemoto219ac732006-02-21 16:05:11 +0900550 parent_tidptr = (int __user *) regs.regs[6];
Ralf Baechle3c370262005-04-13 17:43:59 +0000551
552 /* Use __dummy4 instead of getting it off the stack, so that
553 syscall() works. */
554 child_tidptr = (int __user *) __dummy4;
555 return do_fork(clone_flags, newsp, &regs, 0,
556 parent_tidptr, child_tidptr);
557}