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TOMOYO Linux Cross Reference
Linux/arch/sparc/kernel/sys_sparc32.c

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  1 /* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
  2  *
  3  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
  4  * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
  5  *
  6  * These routines maintain argument size conversion between 32bit and 64bit
  7  * environment.
  8  */
  9 
 10 #include <linux/kernel.h>
 11 #include <linux/sched.h>
 12 #include <linux/capability.h>
 13 #include <linux/fs.h> 
 14 #include <linux/mm.h> 
 15 #include <linux/file.h> 
 16 #include <linux/signal.h>
 17 #include <linux/resource.h>
 18 #include <linux/times.h>
 19 #include <linux/smp.h>
 20 #include <linux/sem.h>
 21 #include <linux/msg.h>
 22 #include <linux/shm.h>
 23 #include <linux/uio.h>
 24 #include <linux/nfs_fs.h>
 25 #include <linux/quota.h>
 26 #include <linux/poll.h>
 27 #include <linux/personality.h>
 28 #include <linux/stat.h>
 29 #include <linux/filter.h>
 30 #include <linux/highmem.h>
 31 #include <linux/highuid.h>
 32 #include <linux/mman.h>
 33 #include <linux/ipv6.h>
 34 #include <linux/in.h>
 35 #include <linux/icmpv6.h>
 36 #include <linux/syscalls.h>
 37 #include <linux/sysctl.h>
 38 #include <linux/binfmts.h>
 39 #include <linux/dnotify.h>
 40 #include <linux/security.h>
 41 #include <linux/compat.h>
 42 #include <linux/vfs.h>
 43 #include <linux/ptrace.h>
 44 #include <linux/slab.h>
 45 
 46 #include <asm/types.h>
 47 #include <asm/uaccess.h>
 48 #include <asm/fpumacro.h>
 49 #include <asm/mmu_context.h>
 50 #include <asm/compat_signal.h>
 51 
 52 #ifdef CONFIG_SYSVIPC                                                        
 53 asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth)
 54 {
 55         int version;
 56 
 57         version = call >> 16; /* hack for backward compatibility */
 58         call &= 0xffff;
 59 
 60         switch (call) {
 61         case SEMTIMEDOP:
 62                 if (fifth)
 63                         /* sign extend semid */
 64                         return compat_sys_semtimedop((int)first,
 65                                                      compat_ptr(ptr), second,
 66                                                      compat_ptr(fifth));
 67                 /* else fall through for normal semop() */
 68         case SEMOP:
 69                 /* struct sembuf is the same on 32 and 64bit :)) */
 70                 /* sign extend semid */
 71                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
 72                                       NULL);
 73         case SEMGET:
 74                 /* sign extend key, nsems */
 75                 return sys_semget((int)first, (int)second, third);
 76         case SEMCTL:
 77                 /* sign extend semid, semnum */
 78                 return compat_sys_semctl((int)first, (int)second, third,
 79                                          compat_ptr(ptr));
 80 
 81         case MSGSND:
 82                 /* sign extend msqid */
 83                 return compat_sys_msgsnd((int)first, (int)second, third,
 84                                          compat_ptr(ptr));
 85         case MSGRCV:
 86                 /* sign extend msqid, msgtyp */
 87                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 88                                          third, version, compat_ptr(ptr));
 89         case MSGGET:
 90                 /* sign extend key */
 91                 return sys_msgget((int)first, second);
 92         case MSGCTL:
 93                 /* sign extend msqid */
 94                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 95 
 96         case SHMAT:
 97                 /* sign extend shmid */
 98                 return compat_sys_shmat((int)first, second, third, version,
 99                                         compat_ptr(ptr));
100         case SHMDT:
101                 return sys_shmdt(compat_ptr(ptr));
102         case SHMGET:
103                 /* sign extend key_t */
104                 return sys_shmget((int)first, second, third);
105         case SHMCTL:
106                 /* sign extend shmid */
107                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
108 
109         default:
110                 return -ENOSYS;
111         }
112 
113         return -ENOSYS;
114 }
115 #endif
116 
117 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
118 {
119         if ((int)high < 0)
120                 return -EINVAL;
121         else
122                 return sys_truncate(path, (high << 32) | low);
123 }
124 
125 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
126 {
127         if ((int)high < 0)
128                 return -EINVAL;
129         else
130                 return sys_ftruncate(fd, (high << 32) | low);
131 }
132 
133 static int cp_compat_stat64(struct kstat *stat,
134                             struct compat_stat64 __user *statbuf)
135 {
136         int err;
137 
138         err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
139         err |= put_user(stat->ino, &statbuf->st_ino);
140         err |= put_user(stat->mode, &statbuf->st_mode);
141         err |= put_user(stat->nlink, &statbuf->st_nlink);
142         err |= put_user(stat->uid, &statbuf->st_uid);
143         err |= put_user(stat->gid, &statbuf->st_gid);
144         err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
145         err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
146         err |= put_user(stat->size, &statbuf->st_size);
147         err |= put_user(stat->blksize, &statbuf->st_blksize);
148         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
149         err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
150         err |= put_user(stat->blocks, &statbuf->st_blocks);
151         err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
152         err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
153         err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
154         err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
155         err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
156         err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
157         err |= put_user(0, &statbuf->__unused4);
158         err |= put_user(0, &statbuf->__unused5);
159 
160         return err;
161 }
162 
163 asmlinkage long compat_sys_stat64(const char __user * filename,
164                 struct compat_stat64 __user *statbuf)
165 {
166         struct kstat stat;
167         int error = vfs_stat(filename, &stat);
168 
169         if (!error)
170                 error = cp_compat_stat64(&stat, statbuf);
171         return error;
172 }
173 
174 asmlinkage long compat_sys_lstat64(const char __user * filename,
175                 struct compat_stat64 __user *statbuf)
176 {
177         struct kstat stat;
178         int error = vfs_lstat(filename, &stat);
179 
180         if (!error)
181                 error = cp_compat_stat64(&stat, statbuf);
182         return error;
183 }
184 
185 asmlinkage long compat_sys_fstat64(unsigned int fd,
186                 struct compat_stat64 __user * statbuf)
187 {
188         struct kstat stat;
189         int error = vfs_fstat(fd, &stat);
190 
191         if (!error)
192                 error = cp_compat_stat64(&stat, statbuf);
193         return error;
194 }
195 
196 asmlinkage long compat_sys_fstatat64(unsigned int dfd,
197                 const char __user *filename,
198                 struct compat_stat64 __user * statbuf, int flag)
199 {
200         struct kstat stat;
201         int error;
202 
203         error = vfs_fstatat(dfd, filename, &stat, flag);
204         if (error)
205                 return error;
206         return cp_compat_stat64(&stat, statbuf);
207 }
208 
209 asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
210 {
211         return sys_sysfs(option, arg1, arg2);
212 }
213 
214 asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
215 {
216         struct timespec t;
217         int ret;
218         mm_segment_t old_fs = get_fs ();
219         
220         set_fs (KERNEL_DS);
221         ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
222         set_fs (old_fs);
223         if (put_compat_timespec(&t, interval))
224                 return -EFAULT;
225         return ret;
226 }
227 
228 asmlinkage long compat_sys_rt_sigprocmask(int how,
229                                           compat_sigset_t __user *set,
230                                           compat_sigset_t __user *oset,
231                                           compat_size_t sigsetsize)
232 {
233         sigset_t s;
234         compat_sigset_t s32;
235         int ret;
236         mm_segment_t old_fs = get_fs();
237         
238         if (set) {
239                 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
240                         return -EFAULT;
241                 switch (_NSIG_WORDS) {
242                 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
243                 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
244                 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
245                 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
246                 }
247         }
248         set_fs (KERNEL_DS);
249         ret = sys_rt_sigprocmask(how,
250                                  set ? (sigset_t __user *) &s : NULL,
251                                  oset ? (sigset_t __user *) &s : NULL,
252                                  sigsetsize);
253         set_fs (old_fs);
254         if (ret) return ret;
255         if (oset) {
256                 switch (_NSIG_WORDS) {
257                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
258                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
259                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
260                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
261                 }
262                 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
263                         return -EFAULT;
264         }
265         return 0;
266 }
267 
268 asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
269                                     compat_size_t sigsetsize)
270 {
271         sigset_t s;
272         compat_sigset_t s32;
273         int ret;
274         mm_segment_t old_fs = get_fs();
275                 
276         set_fs (KERNEL_DS);
277         ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
278         set_fs (old_fs);
279         if (!ret) {
280                 switch (_NSIG_WORDS) {
281                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
282                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
283                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
284                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
285                 }
286                 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
287                         return -EFAULT;
288         }
289         return ret;
290 }
291 
292 asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
293                                            struct compat_siginfo __user *uinfo)
294 {
295         siginfo_t info;
296         int ret;
297         mm_segment_t old_fs = get_fs();
298         
299         if (copy_siginfo_from_user32(&info, uinfo))
300                 return -EFAULT;
301 
302         set_fs (KERNEL_DS);
303         ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
304         set_fs (old_fs);
305         return ret;
306 }
307 
308 asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
309                                      struct old_sigaction32 __user *oact)
310 {
311         struct k_sigaction new_ka, old_ka;
312         int ret;
313 
314         WARN_ON_ONCE(sig >= 0);
315         sig = -sig;
316 
317         if (act) {
318                 compat_old_sigset_t mask;
319                 u32 u_handler, u_restorer;
320                 
321                 ret = get_user(u_handler, &act->sa_handler);
322                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
323                 ret |= __get_user(u_restorer, &act->sa_restorer);
324                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
325                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
326                 ret |= __get_user(mask, &act->sa_mask);
327                 if (ret)
328                         return ret;
329                 new_ka.ka_restorer = NULL;
330                 siginitset(&new_ka.sa.sa_mask, mask);
331         }
332 
333         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
334 
335         if (!ret && oact) {
336                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
337                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
338                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
339                 ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
340         }
341 
342         return ret;
343 }
344 
345 asmlinkage long compat_sys_rt_sigaction(int sig,
346                                         struct sigaction32 __user *act,
347                                         struct sigaction32 __user *oact,
348                                         void __user *restorer,
349                                         compat_size_t sigsetsize)
350 {
351         struct k_sigaction new_ka, old_ka;
352         int ret;
353         compat_sigset_t set32;
354 
355         /* XXX: Don't preclude handling different sized sigset_t's.  */
356         if (sigsetsize != sizeof(compat_sigset_t))
357                 return -EINVAL;
358 
359         if (act) {
360                 u32 u_handler, u_restorer;
361 
362                 new_ka.ka_restorer = restorer;
363                 ret = get_user(u_handler, &act->sa_handler);
364                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
365                 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
366                 switch (_NSIG_WORDS) {
367                 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
368                 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
369                 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
370                 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
371                 }
372                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
373                 ret |= __get_user(u_restorer, &act->sa_restorer);
374                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
375                 if (ret)
376                         return -EFAULT;
377         }
378 
379         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
380 
381         if (!ret && oact) {
382                 switch (_NSIG_WORDS) {
383                 case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
384                 case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
385                 case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
386                 case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
387                 }
388                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
389                 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
390                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
391                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
392                 if (ret)
393                         ret = -EFAULT;
394         }
395 
396         return ret;
397 }
398 
399 /*
400  * sparc32_execve() executes a new program after the asm stub has set
401  * things up for us.  This should basically do what I want it to.
402  */
403 asmlinkage long sparc32_execve(struct pt_regs *regs)
404 {
405         int error, base = 0;
406         char *filename;
407 
408         /* User register window flush is done by entry.S */
409 
410         /* Check for indirect call. */
411         if ((u32)regs->u_regs[UREG_G1] == 0)
412                 base = 1;
413 
414         filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
415         error = PTR_ERR(filename);
416         if (IS_ERR(filename))
417                 goto out;
418 
419         error = compat_do_execve(filename,
420                                  compat_ptr(regs->u_regs[base + UREG_I1]),
421                                  compat_ptr(regs->u_regs[base + UREG_I2]), regs);
422 
423         putname(filename);
424 
425         if (!error) {
426                 fprs_write(0);
427                 current_thread_info()->xfsr[0] = 0;
428                 current_thread_info()->fpsaved[0] = 0;
429                 regs->tstate &= ~TSTATE_PEF;
430         }
431 out:
432         return error;
433 }
434 
435 #ifdef CONFIG_MODULES
436 
437 asmlinkage long sys32_init_module(void __user *umod, u32 len,
438                                   const char __user *uargs)
439 {
440         return sys_init_module(umod, len, uargs);
441 }
442 
443 asmlinkage long sys32_delete_module(const char __user *name_user,
444                                     unsigned int flags)
445 {
446         return sys_delete_module(name_user, flags);
447 }
448 
449 #else /* CONFIG_MODULES */
450 
451 asmlinkage long sys32_init_module(const char __user *name_user,
452                                   struct module __user *mod_user)
453 {
454         return -ENOSYS;
455 }
456 
457 asmlinkage long sys32_delete_module(const char __user *name_user)
458 {
459         return -ENOSYS;
460 }
461 
462 #endif  /* CONFIG_MODULES */
463 
464 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
465                                         char __user *ubuf,
466                                         compat_size_t count,
467                                         unsigned long poshi,
468                                         unsigned long poslo)
469 {
470         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
471 }
472 
473 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
474                                          char __user *ubuf,
475                                          compat_size_t count,
476                                          unsigned long poshi,
477                                          unsigned long poslo)
478 {
479         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
480 }
481 
482 asmlinkage long compat_sys_readahead(int fd,
483                                      unsigned long offhi,
484                                      unsigned long offlo,
485                                      compat_size_t count)
486 {
487         return sys_readahead(fd, (offhi << 32) | offlo, count);
488 }
489 
490 long compat_sys_fadvise64(int fd,
491                           unsigned long offhi,
492                           unsigned long offlo,
493                           compat_size_t len, int advice)
494 {
495         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
496 }
497 
498 long compat_sys_fadvise64_64(int fd,
499                              unsigned long offhi, unsigned long offlo,
500                              unsigned long lenhi, unsigned long lenlo,
501                              int advice)
502 {
503         return sys_fadvise64_64(fd,
504                                 (offhi << 32) | offlo,
505                                 (lenhi << 32) | lenlo,
506                                 advice);
507 }
508 
509 asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
510                                     compat_off_t __user *offset,
511                                     compat_size_t count)
512 {
513         mm_segment_t old_fs = get_fs();
514         int ret;
515         off_t of;
516         
517         if (offset && get_user(of, offset))
518                 return -EFAULT;
519                 
520         set_fs(KERNEL_DS);
521         ret = sys_sendfile(out_fd, in_fd,
522                            offset ? (off_t __user *) &of : NULL,
523                            count);
524         set_fs(old_fs);
525         
526         if (offset && put_user(of, offset))
527                 return -EFAULT;
528                 
529         return ret;
530 }
531 
532 asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
533                                       compat_loff_t __user *offset,
534                                       compat_size_t count)
535 {
536         mm_segment_t old_fs = get_fs();
537         int ret;
538         loff_t lof;
539         
540         if (offset && get_user(lof, offset))
541                 return -EFAULT;
542                 
543         set_fs(KERNEL_DS);
544         ret = sys_sendfile64(out_fd, in_fd,
545                              offset ? (loff_t __user *) &lof : NULL,
546                              count);
547         set_fs(old_fs);
548         
549         if (offset && put_user(lof, offset))
550                 return -EFAULT;
551                 
552         return ret;
553 }
554 
555 /* This is just a version for 32-bit applications which does
556  * not force O_LARGEFILE on.
557  */
558 
559 asmlinkage long sparc32_open(const char __user *filename,
560                              int flags, int mode)
561 {
562         return do_sys_open(AT_FDCWD, filename, flags, mode);
563 }
564 
565 long sys32_lookup_dcookie(unsigned long cookie_high,
566                           unsigned long cookie_low,
567                           char __user *buf, size_t len)
568 {
569         return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
570                                   buf, len);
571 }
572 
573 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)
574 {
575         return sys_sync_file_range(fd,
576                                    (off_high << 32) | off_low,
577                                    (nb_high << 32) | nb_low,
578                                    flags);
579 }
580 
581 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
582                                      u32 lenhi, u32 lenlo)
583 {
584         return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
585                              ((loff_t)lenhi << 32) | lenlo);
586 }
587 

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