arch/sparc/kernel/sys_sparc32.c

   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 }