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Commit | Line | Data |
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1da177e4 LT |
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 | */ | |
1da177e4 LT |
8 | #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> | |
14 | #include <linux/dirent.h> | |
15 | #include <linux/resource.h> | |
16 | #include <linux/highmem.h> | |
17 | #include <linux/time.h> | |
18 | #include <linux/times.h> | |
19 | #include <linux/poll.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/skbuff.h> | |
22 | #include <linux/filter.h> | |
23 | #include <linux/shm.h> | |
24 | #include <linux/sem.h> | |
25 | #include <linux/msg.h> | |
26 | #include <linux/icmpv6.h> | |
27 | #include <linux/syscalls.h> | |
28 | #include <linux/sysctl.h> | |
29 | #include <linux/utime.h> | |
30 | #include <linux/utsname.h> | |
31 | #include <linux/personality.h> | |
1da177e4 LT |
32 | #include <linux/dnotify.h> |
33 | #include <linux/module.h> | |
34 | #include <linux/binfmts.h> | |
35 | #include <linux/security.h> | |
36 | #include <linux/compat.h> | |
37 | #include <linux/vfs.h> | |
38 | ||
39 | #include <net/sock.h> | |
40 | #include <net/scm.h> | |
41 | ||
431dc804 | 42 | #include <asm/compat-signal.h> |
1da177e4 LT |
43 | #include <asm/ipc.h> |
44 | #include <asm/sim.h> | |
45 | #include <asm/uaccess.h> | |
46 | #include <asm/mmu_context.h> | |
47 | #include <asm/mman.h> | |
48 | ||
49 | /* Use this to get at 32-bit user passed pointers. */ | |
50 | /* A() macro should be used for places where you e.g. | |
51 | have some internal variable u32 and just want to get | |
52 | rid of a compiler warning. AA() has to be used in | |
53 | places where you want to convert a function argument | |
54 | to 32bit pointer or when you e.g. access pt_regs | |
55 | structure and want to consider 32bit registers only. | |
56 | */ | |
57 | #define A(__x) ((unsigned long)(__x)) | |
58 | #define AA(__x) ((unsigned long)((int)__x)) | |
59 | ||
60 | #ifdef __MIPSEB__ | |
61 | #define merge_64(r1,r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL)) | |
62 | #endif | |
63 | #ifdef __MIPSEL__ | |
64 | #define merge_64(r1,r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL)) | |
65 | #endif | |
66 | ||
67 | /* | |
68 | * Revalidate the inode. This is required for proper NFS attribute caching. | |
69 | */ | |
70 | ||
219ac73a | 71 | int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf) |
1da177e4 LT |
72 | { |
73 | struct compat_stat tmp; | |
74 | ||
75 | if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev)) | |
76 | return -EOVERFLOW; | |
77 | ||
78 | memset(&tmp, 0, sizeof(tmp)); | |
79 | tmp.st_dev = new_encode_dev(stat->dev); | |
80 | tmp.st_ino = stat->ino; | |
afefdbb2 DH |
81 | if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino) |
82 | return -EOVERFLOW; | |
1da177e4 LT |
83 | tmp.st_mode = stat->mode; |
84 | tmp.st_nlink = stat->nlink; | |
85 | SET_UID(tmp.st_uid, stat->uid); | |
86 | SET_GID(tmp.st_gid, stat->gid); | |
87 | tmp.st_rdev = new_encode_dev(stat->rdev); | |
88 | tmp.st_size = stat->size; | |
89 | tmp.st_atime = stat->atime.tv_sec; | |
90 | tmp.st_mtime = stat->mtime.tv_sec; | |
91 | tmp.st_ctime = stat->ctime.tv_sec; | |
92 | #ifdef STAT_HAVE_NSEC | |
93 | tmp.st_atime_nsec = stat->atime.tv_nsec; | |
94 | tmp.st_mtime_nsec = stat->mtime.tv_nsec; | |
95 | tmp.st_ctime_nsec = stat->ctime.tv_nsec; | |
96 | #endif | |
97 | tmp.st_blocks = stat->blocks; | |
98 | tmp.st_blksize = stat->blksize; | |
99 | return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0; | |
100 | } | |
101 | ||
102 | asmlinkage unsigned long | |
103 | sys32_mmap2(unsigned long addr, unsigned long len, unsigned long prot, | |
104 | unsigned long flags, unsigned long fd, unsigned long pgoff) | |
105 | { | |
106 | struct file * file = NULL; | |
107 | unsigned long error; | |
108 | ||
109 | error = -EINVAL; | |
947df17c PA |
110 | if (pgoff & (~PAGE_MASK >> 12)) |
111 | goto out; | |
112 | pgoff >>= PAGE_SHIFT-12; | |
113 | ||
1da177e4 LT |
114 | if (!(flags & MAP_ANONYMOUS)) { |
115 | error = -EBADF; | |
116 | file = fget(fd); | |
117 | if (!file) | |
118 | goto out; | |
119 | } | |
120 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
121 | ||
122 | down_write(¤t->mm->mmap_sem); | |
123 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
124 | up_write(¤t->mm->mmap_sem); | |
125 | if (file) | |
126 | fput(file); | |
127 | ||
128 | out: | |
129 | return error; | |
130 | } | |
131 | ||
132 | ||
219ac73a | 133 | asmlinkage int sys_truncate64(const char __user *path, unsigned int high, |
1da177e4 LT |
134 | unsigned int low) |
135 | { | |
136 | if ((int)high < 0) | |
137 | return -EINVAL; | |
138 | return sys_truncate(path, ((long) high << 32) | low); | |
139 | } | |
140 | ||
141 | asmlinkage int sys_ftruncate64(unsigned int fd, unsigned int high, | |
142 | unsigned int low) | |
143 | { | |
144 | if ((int)high < 0) | |
145 | return -EINVAL; | |
146 | return sys_ftruncate(fd, ((long) high << 32) | low); | |
147 | } | |
148 | ||
149 | /* | |
150 | * sys_execve() executes a new program. | |
151 | */ | |
152 | asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs) | |
153 | { | |
154 | int error; | |
155 | char * filename; | |
156 | ||
157 | filename = getname(compat_ptr(regs.regs[4])); | |
158 | error = PTR_ERR(filename); | |
159 | if (IS_ERR(filename)) | |
160 | goto out; | |
161 | error = compat_do_execve(filename, compat_ptr(regs.regs[5]), | |
162 | compat_ptr(regs.regs[6]), ®s); | |
163 | putname(filename); | |
164 | ||
165 | out: | |
166 | return error; | |
167 | } | |
168 | ||
1da177e4 LT |
169 | #define RLIM_INFINITY32 0x7fffffff |
170 | #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x) | |
171 | ||
172 | struct rlimit32 { | |
173 | int rlim_cur; | |
174 | int rlim_max; | |
175 | }; | |
176 | ||
177 | #ifdef __MIPSEB__ | |
219ac73a | 178 | asmlinkage long sys32_truncate64(const char __user * path, unsigned long __dummy, |
1da177e4 LT |
179 | int length_hi, int length_lo) |
180 | #endif | |
181 | #ifdef __MIPSEL__ | |
219ac73a | 182 | asmlinkage long sys32_truncate64(const char __user * path, unsigned long __dummy, |
1da177e4 LT |
183 | int length_lo, int length_hi) |
184 | #endif | |
185 | { | |
186 | loff_t length; | |
187 | ||
188 | length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo; | |
189 | ||
190 | return sys_truncate(path, length); | |
191 | } | |
192 | ||
193 | #ifdef __MIPSEB__ | |
194 | asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy, | |
195 | int length_hi, int length_lo) | |
196 | #endif | |
197 | #ifdef __MIPSEL__ | |
198 | asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy, | |
199 | int length_lo, int length_hi) | |
200 | #endif | |
201 | { | |
202 | loff_t length; | |
203 | ||
204 | length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo; | |
205 | ||
206 | return sys_ftruncate(fd, length); | |
207 | } | |
208 | ||
209 | static inline long | |
219ac73a | 210 | get_tv32(struct timeval *o, struct compat_timeval __user *i) |
1da177e4 LT |
211 | { |
212 | return (!access_ok(VERIFY_READ, i, sizeof(*i)) || | |
213 | (__get_user(o->tv_sec, &i->tv_sec) | | |
214 | __get_user(o->tv_usec, &i->tv_usec))); | |
215 | } | |
216 | ||
217 | static inline long | |
219ac73a | 218 | put_tv32(struct compat_timeval __user *o, struct timeval *i) |
1da177e4 LT |
219 | { |
220 | return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || | |
221 | (__put_user(i->tv_sec, &o->tv_sec) | | |
222 | __put_user(i->tv_usec, &o->tv_usec))); | |
223 | } | |
224 | ||
225 | extern struct timezone sys_tz; | |
226 | ||
227 | asmlinkage int | |
219ac73a | 228 | sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) |
1da177e4 LT |
229 | { |
230 | if (tv) { | |
231 | struct timeval ktv; | |
232 | do_gettimeofday(&ktv); | |
233 | if (put_tv32(tv, &ktv)) | |
234 | return -EFAULT; | |
235 | } | |
236 | if (tz) { | |
237 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) | |
238 | return -EFAULT; | |
239 | } | |
240 | return 0; | |
241 | } | |
242 | ||
219ac73a | 243 | static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i) |
1da177e4 LT |
244 | { |
245 | long usec; | |
246 | ||
247 | if (!access_ok(VERIFY_READ, i, sizeof(*i))) | |
248 | return -EFAULT; | |
249 | if (__get_user(o->tv_sec, &i->tv_sec)) | |
250 | return -EFAULT; | |
251 | if (__get_user(usec, &i->tv_usec)) | |
252 | return -EFAULT; | |
253 | o->tv_nsec = usec * 1000; | |
254 | return 0; | |
255 | } | |
256 | ||
257 | asmlinkage int | |
219ac73a | 258 | sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz) |
1da177e4 LT |
259 | { |
260 | struct timespec kts; | |
261 | struct timezone ktz; | |
262 | ||
263 | if (tv) { | |
264 | if (get_ts32(&kts, tv)) | |
265 | return -EFAULT; | |
266 | } | |
267 | if (tz) { | |
268 | if (copy_from_user(&ktz, tz, sizeof(ktz))) | |
269 | return -EFAULT; | |
270 | } | |
271 | ||
272 | return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); | |
273 | } | |
274 | ||
275 | asmlinkage int sys32_llseek(unsigned int fd, unsigned int offset_high, | |
219ac73a | 276 | unsigned int offset_low, loff_t __user * result, |
1da177e4 LT |
277 | unsigned int origin) |
278 | { | |
279 | return sys_llseek(fd, offset_high, offset_low, result, origin); | |
280 | } | |
281 | ||
282 | /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op + | |
283 | lseek back to original location. They fail just like lseek does on | |
284 | non-seekable files. */ | |
285 | ||
219ac73a | 286 | asmlinkage ssize_t sys32_pread(unsigned int fd, char __user * buf, |
1da177e4 LT |
287 | size_t count, u32 unused, u64 a4, u64 a5) |
288 | { | |
6ad0013b | 289 | return sys_pread64(fd, buf, count, merge_64(a4, a5)); |
1da177e4 LT |
290 | } |
291 | ||
219ac73a | 292 | asmlinkage ssize_t sys32_pwrite(unsigned int fd, const char __user * buf, |
1da177e4 LT |
293 | size_t count, u32 unused, u64 a4, u64 a5) |
294 | { | |
6ad0013b | 295 | return sys_pwrite64(fd, buf, count, merge_64(a4, a5)); |
1da177e4 LT |
296 | } |
297 | ||
298 | asmlinkage int sys32_sched_rr_get_interval(compat_pid_t pid, | |
219ac73a | 299 | struct compat_timespec __user *interval) |
1da177e4 LT |
300 | { |
301 | struct timespec t; | |
302 | int ret; | |
303 | mm_segment_t old_fs = get_fs (); | |
304 | ||
305 | set_fs (KERNEL_DS); | |
219ac73a | 306 | ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t); |
1da177e4 LT |
307 | set_fs (old_fs); |
308 | if (put_user (t.tv_sec, &interval->tv_sec) || | |
309 | __put_user (t.tv_nsec, &interval->tv_nsec)) | |
310 | return -EFAULT; | |
311 | return ret; | |
312 | } | |
313 | ||
65f8ebe0 RB |
314 | #ifdef CONFIG_SYSVIPC |
315 | ||
1da177e4 LT |
316 | asmlinkage long |
317 | sys32_ipc (u32 call, int first, int second, int third, u32 ptr, u32 fifth) | |
318 | { | |
319 | int version, err; | |
320 | ||
321 | version = call >> 16; /* hack for backward compatibility */ | |
322 | call &= 0xffff; | |
323 | ||
324 | switch (call) { | |
325 | case SEMOP: | |
326 | /* struct sembuf is the same on 32 and 64bit :)) */ | |
05e43966 | 327 | err = sys_semtimedop(first, compat_ptr(ptr), second, NULL); |
1da177e4 LT |
328 | break; |
329 | case SEMTIMEDOP: | |
05e43966 AN |
330 | err = compat_sys_semtimedop(first, compat_ptr(ptr), second, |
331 | compat_ptr(fifth)); | |
1da177e4 LT |
332 | break; |
333 | case SEMGET: | |
05e43966 | 334 | err = sys_semget(first, second, third); |
1da177e4 LT |
335 | break; |
336 | case SEMCTL: | |
05e43966 | 337 | err = compat_sys_semctl(first, second, third, compat_ptr(ptr)); |
1da177e4 | 338 | break; |
1da177e4 | 339 | case MSGSND: |
05e43966 | 340 | err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr)); |
1da177e4 LT |
341 | break; |
342 | case MSGRCV: | |
05e43966 AN |
343 | err = compat_sys_msgrcv(first, second, fifth, third, |
344 | version, compat_ptr(ptr)); | |
1da177e4 LT |
345 | break; |
346 | case MSGGET: | |
05e43966 | 347 | err = sys_msgget((key_t) first, second); |
1da177e4 LT |
348 | break; |
349 | case MSGCTL: | |
05e43966 | 350 | err = compat_sys_msgctl(first, second, compat_ptr(ptr)); |
1da177e4 | 351 | break; |
1da177e4 | 352 | case SHMAT: |
05e43966 AN |
353 | err = compat_sys_shmat(first, second, third, version, |
354 | compat_ptr(ptr)); | |
1da177e4 LT |
355 | break; |
356 | case SHMDT: | |
05e43966 | 357 | err = sys_shmdt(compat_ptr(ptr)); |
1da177e4 LT |
358 | break; |
359 | case SHMGET: | |
05e43966 | 360 | err = sys_shmget(first, (unsigned)second, third); |
1da177e4 LT |
361 | break; |
362 | case SHMCTL: | |
05e43966 | 363 | err = compat_sys_shmctl(first, second, compat_ptr(ptr)); |
1da177e4 LT |
364 | break; |
365 | default: | |
366 | err = -EINVAL; | |
367 | break; | |
368 | } | |
369 | ||
370 | return err; | |
371 | } | |
372 | ||
65f8ebe0 RB |
373 | #else |
374 | ||
375 | asmlinkage long | |
376 | sys32_ipc (u32 call, int first, int second, int third, u32 ptr, u32 fifth) | |
377 | { | |
378 | return -ENOSYS; | |
379 | } | |
380 | ||
381 | #endif /* CONFIG_SYSVIPC */ | |
382 | ||
05e43966 | 383 | #ifdef CONFIG_MIPS32_N32 |
e16d8df0 | 384 | asmlinkage long sysn32_semctl(int semid, int semnum, int cmd, u32 arg) |
1da177e4 | 385 | { |
05e43966 AN |
386 | /* compat_sys_semctl expects a pointer to union semun */ |
387 | u32 __user *uptr = compat_alloc_user_space(sizeof(u32)); | |
e16d8df0 | 388 | if (put_user(arg, uptr)) |
05e43966 AN |
389 | return -EFAULT; |
390 | return compat_sys_semctl(semid, semnum, cmd, uptr); | |
1da177e4 | 391 | } |
e16d8df0 AN |
392 | |
393 | asmlinkage long sysn32_msgsnd(int msqid, u32 msgp, unsigned msgsz, int msgflg) | |
394 | { | |
395 | return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp)); | |
396 | } | |
397 | ||
398 | asmlinkage long sysn32_msgrcv(int msqid, u32 msgp, size_t msgsz, int msgtyp, | |
399 | int msgflg) | |
400 | { | |
401 | return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64, | |
402 | compat_ptr(msgp)); | |
403 | } | |
05e43966 | 404 | #endif |
1da177e4 LT |
405 | |
406 | struct sysctl_args32 | |
407 | { | |
408 | compat_caddr_t name; | |
409 | int nlen; | |
410 | compat_caddr_t oldval; | |
411 | compat_caddr_t oldlenp; | |
412 | compat_caddr_t newval; | |
413 | compat_size_t newlen; | |
414 | unsigned int __unused[4]; | |
415 | }; | |
416 | ||
b89a8171 | 417 | #ifdef CONFIG_SYSCTL_SYSCALL |
1da177e4 | 418 | |
219ac73a | 419 | asmlinkage long sys32_sysctl(struct sysctl_args32 __user *args) |
1da177e4 LT |
420 | { |
421 | struct sysctl_args32 tmp; | |
422 | int error; | |
219ac73a AN |
423 | size_t oldlen; |
424 | size_t __user *oldlenp = NULL; | |
425 | unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7; | |
1da177e4 LT |
426 | |
427 | if (copy_from_user(&tmp, args, sizeof(tmp))) | |
428 | return -EFAULT; | |
429 | ||
430 | if (tmp.oldval && tmp.oldlenp) { | |
431 | /* Duh, this is ugly and might not work if sysctl_args | |
432 | is in read-only memory, but do_sysctl does indirectly | |
433 | a lot of uaccess in both directions and we'd have to | |
434 | basically copy the whole sysctl.c here, and | |
435 | glibc's __sysctl uses rw memory for the structure | |
436 | anyway. */ | |
219ac73a AN |
437 | if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) || |
438 | put_user(oldlen, (size_t __user *)addr)) | |
1da177e4 | 439 | return -EFAULT; |
219ac73a | 440 | oldlenp = (size_t __user *)addr; |
1da177e4 LT |
441 | } |
442 | ||
443 | lock_kernel(); | |
219ac73a AN |
444 | error = do_sysctl((int __user *)A(tmp.name), tmp.nlen, (void __user *)A(tmp.oldval), |
445 | oldlenp, (void __user *)A(tmp.newval), tmp.newlen); | |
1da177e4 LT |
446 | unlock_kernel(); |
447 | if (oldlenp) { | |
448 | if (!error) { | |
219ac73a AN |
449 | if (get_user(oldlen, (size_t __user *)addr) || |
450 | put_user(oldlen, (u32 __user *)A(tmp.oldlenp))) | |
1da177e4 LT |
451 | error = -EFAULT; |
452 | } | |
453 | copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)); | |
454 | } | |
455 | return error; | |
456 | } | |
457 | ||
b89a8171 | 458 | #endif /* CONFIG_SYSCTL_SYSCALL */ |
1da177e4 | 459 | |
219ac73a | 460 | asmlinkage long sys32_newuname(struct new_utsname __user * name) |
1da177e4 LT |
461 | { |
462 | int ret = 0; | |
463 | ||
464 | down_read(&uts_sem); | |
e9ff3990 | 465 | if (copy_to_user(name, utsname(), sizeof *name)) |
1da177e4 LT |
466 | ret = -EFAULT; |
467 | up_read(&uts_sem); | |
468 | ||
469 | if (current->personality == PER_LINUX32 && !ret) | |
470 | if (copy_to_user(name->machine, "mips\0\0\0", 8)) | |
471 | ret = -EFAULT; | |
472 | ||
473 | return ret; | |
474 | } | |
475 | ||
476 | asmlinkage int sys32_personality(unsigned long personality) | |
477 | { | |
478 | int ret; | |
53571ce4 TS |
479 | personality &= 0xffffffff; |
480 | if (personality(current->personality) == PER_LINUX32 && | |
481 | personality == PER_LINUX) | |
1da177e4 LT |
482 | personality = PER_LINUX32; |
483 | ret = sys_personality(personality); | |
484 | if (ret == PER_LINUX32) | |
485 | ret = PER_LINUX; | |
486 | return ret; | |
487 | } | |
488 | ||
489 | /* ustat compatibility */ | |
490 | struct ustat32 { | |
491 | compat_daddr_t f_tfree; | |
492 | compat_ino_t f_tinode; | |
493 | char f_fname[6]; | |
494 | char f_fpack[6]; | |
495 | }; | |
496 | ||
219ac73a | 497 | extern asmlinkage long sys_ustat(dev_t dev, struct ustat __user * ubuf); |
1da177e4 | 498 | |
219ac73a | 499 | asmlinkage int sys32_ustat(dev_t dev, struct ustat32 __user * ubuf32) |
1da177e4 LT |
500 | { |
501 | int err; | |
e0daad44 | 502 | struct ustat tmp; |
1da177e4 LT |
503 | struct ustat32 tmp32; |
504 | mm_segment_t old_fs = get_fs(); | |
505 | ||
506 | set_fs(KERNEL_DS); | |
219ac73a | 507 | err = sys_ustat(dev, (struct ustat __user *)&tmp); |
1da177e4 LT |
508 | set_fs (old_fs); |
509 | ||
510 | if (err) | |
511 | goto out; | |
512 | ||
e0daad44 RB |
513 | memset(&tmp32,0,sizeof(struct ustat32)); |
514 | tmp32.f_tfree = tmp.f_tfree; | |
515 | tmp32.f_tinode = tmp.f_tinode; | |
1da177e4 | 516 | |
e0daad44 | 517 | err = copy_to_user(ubuf32,&tmp32,sizeof(struct ustat32)) ? -EFAULT : 0; |
1da177e4 LT |
518 | |
519 | out: | |
520 | return err; | |
521 | } | |
522 | ||
219ac73a | 523 | asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, |
1da177e4 LT |
524 | s32 count) |
525 | { | |
526 | mm_segment_t old_fs = get_fs(); | |
527 | int ret; | |
528 | off_t of; | |
42a3b4f2 | 529 | |
1da177e4 LT |
530 | if (offset && get_user(of, offset)) |
531 | return -EFAULT; | |
42a3b4f2 | 532 | |
1da177e4 | 533 | set_fs(KERNEL_DS); |
219ac73a | 534 | ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count); |
1da177e4 | 535 | set_fs(old_fs); |
42a3b4f2 | 536 | |
1da177e4 LT |
537 | if (offset && put_user(of, offset)) |
538 | return -EFAULT; | |
42a3b4f2 | 539 | |
1da177e4 LT |
540 | return ret; |
541 | } | |
542 | ||
543 | asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3, | |
544 | size_t count) | |
545 | { | |
546 | return sys_readahead(fd, merge_64(a2, a3), count); | |
547 | } | |
548 | ||
a8d587a7 RB |
549 | asmlinkage long sys32_sync_file_range(int fd, int __pad, |
550 | unsigned long a2, unsigned long a3, | |
551 | unsigned long a4, unsigned long a5, | |
552 | int flags) | |
553 | { | |
554 | return sys_sync_file_range(fd, | |
555 | merge_64(a2, a3), merge_64(a4, a5), | |
556 | flags); | |
557 | } | |
558 | ||
8676d2e0 AN |
559 | asmlinkage long sys32_fadvise64_64(int fd, int __pad, |
560 | unsigned long a2, unsigned long a3, | |
561 | unsigned long a4, unsigned long a5, | |
562 | int flags) | |
563 | { | |
564 | return sys_fadvise64_64(fd, | |
565 | merge_64(a2, a3), merge_64(a4, a5), | |
566 | flags); | |
567 | } | |
568 | ||
3c37026d | 569 | save_static_function(sys32_clone); |
f5dbeaf5 | 570 | static int noinline __used |
3c37026d RB |
571 | _sys32_clone(nabi_no_regargs struct pt_regs regs) |
572 | { | |
573 | unsigned long clone_flags; | |
574 | unsigned long newsp; | |
575 | int __user *parent_tidptr, *child_tidptr; | |
576 | ||
577 | clone_flags = regs.regs[4]; | |
578 | newsp = regs.regs[5]; | |
579 | if (!newsp) | |
580 | newsp = regs.regs[29]; | |
219ac73a | 581 | parent_tidptr = (int __user *) regs.regs[6]; |
3c37026d RB |
582 | |
583 | /* Use __dummy4 instead of getting it off the stack, so that | |
584 | syscall() works. */ | |
585 | child_tidptr = (int __user *) __dummy4; | |
586 | return do_fork(clone_flags, newsp, ®s, 0, | |
587 | parent_tidptr, child_tidptr); | |
588 | } |