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(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid);
 143         err |= put_user(from_kgid_munged(current_user_ns(), 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 COMPAT_SYSCALL_DEFINE3(sparc_sigaction, int, sig,
 215                         struct compat_old_sigaction __user *,act,
 216                         struct compat_old_sigaction __user *,oact)
 217 {
 218         WARN_ON_ONCE(sig >= 0);
 219         return compat_sys_sigaction(-sig, act, oact);
 220 }
 221
 222 COMPAT_SYSCALL_DEFINE5(rt_sigaction, int, sig,
 223                         struct compat_sigaction __user *,act,
 224                         struct compat_sigaction __user *,oact,
 225                         void __user *,restorer,
 226                         compat_size_t,sigsetsize)
 227 {
 228         struct k_sigaction new_ka, old_ka;
 229         int ret;
 230         compat_sigset_t set32;
 231
 232         /* XXX: Don't preclude handling different sized sigset_t's.  */
 233         if (sigsetsize != sizeof(compat_sigset_t))
 234                 return -EINVAL;
 235
 236         if (act) {
 237                 u32 u_handler, u_restorer;
 238
 239                 new_ka.ka_restorer = restorer;
 240                 ret = get_user(u_handler, &act->sa_handler);
 241                 new_ka.sa.sa_handler =  compat_ptr(u_handler);
 242                 ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
 243                 sigset_from_compat(&new_ka.sa.sa_mask, &set32);
 244                 ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
 245                 ret |= __get_user(u_restorer, &act->sa_restorer);
 246                 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
 247                 if (ret)
 248                         return -EFAULT;
 249         }
 250
 251         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 252
 253         if (!ret && oact) {
 254                 sigset_to_compat(&set32, &old_ka.sa.sa_mask);
 255                 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
 256                 ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
 257                 ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
 258                 ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
 259                 if (ret)
 260                         ret = -EFAULT;
 261         }
 262
 263         return ret;
 264 }
 265
 266 #ifdef CONFIG_MODULES
 267
 268 asmlinkage long sys32_init_module(void __user *umod, u32 len,
 269                                   const char __user *uargs)
 270 {
 271         return sys_init_module(umod, len, uargs);
 272 }
 273
 274 asmlinkage long sys32_delete_module(const char __user *name_user,
 275                                     unsigned int flags)
 276 {
 277         return sys_delete_module(name_user, flags);
 278 }
 279
 280 #else /* CONFIG_MODULES */
 281
 282 asmlinkage long sys32_init_module(const char __user *name_user,
 283                                   struct module __user *mod_user)
 284 {
 285         return -ENOSYS;
 286 }
 287
 288 asmlinkage long sys32_delete_module(const char __user *name_user)
 289 {
 290         return -ENOSYS;
 291 }
 292
 293 #endif  /* CONFIG_MODULES */
 294
 295 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
 296                                         char __user *ubuf,
 297                                         compat_size_t count,
 298                                         unsigned long poshi,
 299                                         unsigned long poslo)
 300 {
 301         return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
 302 }
 303
 304 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
 305                                          char __user *ubuf,
 306                                          compat_size_t count,
 307                                          unsigned long poshi,
 308                                          unsigned long poslo)
 309 {
 310         return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
 311 }
 312
 313 asmlinkage long compat_sys_readahead(int fd,
 314                                      unsigned long offhi,
 315                                      unsigned long offlo,
 316                                      compat_size_t count)
 317 {
 318         return sys_readahead(fd, (offhi << 32) | offlo, count);
 319 }
 320
 321 long compat_sys_fadvise64(int fd,
 322                           unsigned long offhi,
 323                           unsigned long offlo,
 324                           compat_size_t len, int advice)
 325 {
 326         return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
 327 }
 328
 329 long compat_sys_fadvise64_64(int fd,
 330                              unsigned long offhi, unsigned long offlo,
 331                              unsigned long lenhi, unsigned long lenlo,
 332                              int advice)
 333 {
 334         return sys_fadvise64_64(fd,
 335                                 (offhi << 32) | offlo,
 336                                 (lenhi << 32) | lenlo,
 337                                 advice);
 338 }
 339
 340 /* This is just a version for 32-bit applications which does
 341  * not force O_LARGEFILE on.
 342  */
 343
 344 asmlinkage long sparc32_open(const char __user *filename,
 345                              int flags, int mode)
 346 {
 347         return do_sys_open(AT_FDCWD, filename, flags, mode);
 348 }
 349
 350 long sys32_lookup_dcookie(unsigned long cookie_high,
 351                           unsigned long cookie_low,
 352                           char __user *buf, size_t len)
 353 {
 354         return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
 355                                   buf, len);
 356 }
 357
 358 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)
 359 {
 360         return sys_sync_file_range(fd,
 361                                    (off_high << 32) | off_low,
 362                                    (nb_high << 32) | nb_low,
 363                                    flags);
 364 }
 365
 366 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
 367                                      u32 lenhi, u32 lenlo)
 368 {
 369         return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
 370                              ((loff_t)lenhi << 32) | lenlo);
 371 }