arch/x86_64/ia32/sys_ia32.c

   1 /*
   2  * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on
   3  *             sys_sparc32
   4  *
   5  * Copyright (C) 2000           VA Linux Co
   6  * Copyright (C) 2000           Don Dugger <n0ano@valinux.com>
   7  * Copyright (C) 1999           Arun Sharma <arun.sharma@intel.com>
   8  * Copyright (C) 1997,1998      Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   9  * Copyright (C) 1997           David S. Miller (davem@caip.rutgers.edu)
  10  * Copyright (C) 2000           Hewlett-Packard Co.
  11  * Copyright (C) 2000           David Mosberger-Tang <davidm@hpl.hp.com>
  12  * Copyright (C) 2000,2001,2002 Andi Kleen, SuSE Labs (x86-64 port)
  13  *
  14  * These routines maintain argument size conversion between 32bit and 64bit
  15  * environment. In 2.5 most of this should be moved to a generic directory.
  16  *
  17  * This file assumes that there is a hole at the end of user address space.
  18  *
  19  * Some of the functions are LE specific currently. These are hopefully all marked.
  20  * This should be fixed.
  21  */
  22
  23 #include <linux/config.h>
  24 #include <linux/kernel.h>
  25 #include <linux/sched.h>
  26 #include <linux/fs.h>
  27 #include <linux/file.h>
  28 #include <linux/signal.h>
  29 #include <linux/syscalls.h>
  30 #include <linux/resource.h>
  31 #include <linux/times.h>
  32 #include <linux/utsname.h>
  33 #include <linux/smp.h>
  34 #include <linux/smp_lock.h>
  35 #include <linux/sem.h>
  36 #include <linux/msg.h>
  37 #include <linux/mm.h>
  38 #include <linux/shm.h>
  39 #include <linux/slab.h>
  40 #include <linux/uio.h>
  41 #include <linux/nfs_fs.h>
  42 #include <linux/quota.h>
  43 #include <linux/module.h>
  44 #include <linux/sunrpc/svc.h>
  45 #include <linux/nfsd/nfsd.h>
  46 #include <linux/nfsd/cache.h>
  47 #include <linux/nfsd/xdr.h>
  48 #include <linux/nfsd/syscall.h>
  49 #include <linux/poll.h>
  50 #include <linux/personality.h>
  51 #include <linux/stat.h>
  52 #include <linux/ipc.h>
  53 #include <linux/rwsem.h>
  54 #include <linux/binfmts.h>
  55 #include <linux/init.h>
  56 #include <linux/aio_abi.h>
  57 #include <linux/aio.h>
  58 #include <linux/compat.h>
  59 #include <linux/vfs.h>
  60 #include <linux/ptrace.h>
  61 #include <linux/highuid.h>
  62 #include <linux/vmalloc.h>
  63 #include <linux/fsnotify.h>
  64 #include <asm/mman.h>
  65 #include <asm/types.h>
  66 #include <asm/uaccess.h>
  67 #include <asm/semaphore.h>
  68 #include <asm/atomic.h>
  69 #include <asm/ldt.h>
  70
  71 #include <net/scm.h>
  72 #include <net/sock.h>
  73 #include <asm/ia32.h>
  74
  75 #define AA(__x)         ((unsigned long)(__x))
  76
  77 int cp_compat_stat(struct kstat *kbuf, struct compat_stat __user *ubuf)
  78 {
  79         typeof(ubuf->st_uid) uid = 0;
  80         typeof(ubuf->st_gid) gid = 0;
  81         SET_UID(uid, kbuf->uid);
  82         SET_GID(gid, kbuf->gid);
  83         if (!old_valid_dev(kbuf->dev) || !old_valid_dev(kbuf->rdev))
  84                 return -EOVERFLOW;
  85         if (kbuf->size >= 0x7fffffff)
  86                 return -EOVERFLOW;
  87         if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct compat_stat)) ||
  88             __put_user (old_encode_dev(kbuf->dev), &ubuf->st_dev) ||
  89             __put_user (kbuf->ino, &ubuf->st_ino) ||
  90             __put_user (kbuf->mode, &ubuf->st_mode) ||
  91             __put_user (kbuf->nlink, &ubuf->st_nlink) ||
  92             __put_user (uid, &ubuf->st_uid) ||
  93             __put_user (gid, &ubuf->st_gid) ||
  94             __put_user (old_encode_dev(kbuf->rdev), &ubuf->st_rdev) ||
  95             __put_user (kbuf->size, &ubuf->st_size) ||
  96             __put_user (kbuf->atime.tv_sec, &ubuf->st_atime) ||
  97             __put_user (kbuf->atime.tv_nsec, &ubuf->st_atime_nsec) ||
  98             __put_user (kbuf->mtime.tv_sec, &ubuf->st_mtime) ||
  99             __put_user (kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
 100             __put_user (kbuf->ctime.tv_sec, &ubuf->st_ctime) ||
 101             __put_user (kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
 102             __put_user (kbuf->blksize, &ubuf->st_blksize) ||
 103             __put_user (kbuf->blocks, &ubuf->st_blocks))
 104                 return -EFAULT;
 105         return 0;
 106 }
 107
 108 asmlinkage long
 109 sys32_truncate64(char __user * filename, unsigned long offset_low, unsigned long offset_high)
 110 {
 111        return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
 112 }
 113
 114 asmlinkage long
 115 sys32_ftruncate64(unsigned int fd, unsigned long offset_low, unsigned long offset_high)
 116 {
 117        return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
 118 }
 119
 120 /* Another set for IA32/LFS -- x86_64 struct stat is different due to
 121    support for 64bit inode numbers. */
 122
 123 static int
 124 cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
 125 {
 126         typeof(ubuf->st_uid) uid = 0;
 127         typeof(ubuf->st_gid) gid = 0;
 128         SET_UID(uid, stat->uid);
 129         SET_GID(gid, stat->gid);
 130         if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
 131             __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
 132             __put_user (stat->ino, &ubuf->__st_ino) ||
 133             __put_user (stat->ino, &ubuf->st_ino) ||
 134             __put_user (stat->mode, &ubuf->st_mode) ||
 135             __put_user (stat->nlink, &ubuf->st_nlink) ||
 136             __put_user (uid, &ubuf->st_uid) ||
 137             __put_user (gid, &ubuf->st_gid) ||
 138             __put_user (huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||
 139             __put_user (stat->size, &ubuf->st_size) ||
 140             __put_user (stat->atime.tv_sec, &ubuf->st_atime) ||
 141             __put_user (stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||
 142             __put_user (stat->mtime.tv_sec, &ubuf->st_mtime) ||
 143             __put_user (stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
 144             __put_user (stat->ctime.tv_sec, &ubuf->st_ctime) ||
 145             __put_user (stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
 146             __put_user (stat->blksize, &ubuf->st_blksize) ||
 147             __put_user (stat->blocks, &ubuf->st_blocks))
 148                 return -EFAULT;
 149         return 0;
 150 }
 151
 152 asmlinkage long
 153 sys32_stat64(char __user * filename, struct stat64 __user *statbuf)
 154 {
 155         struct kstat stat;
 156         int ret = vfs_stat(filename, &stat);
 157         if (!ret)
 158                 ret = cp_stat64(statbuf, &stat);
 159         return ret;
 160 }
 161
 162 asmlinkage long
 163 sys32_lstat64(char __user * filename, struct stat64 __user *statbuf)
 164 {
 165         struct kstat stat;
 166         int ret = vfs_lstat(filename, &stat);
 167         if (!ret)
 168                 ret = cp_stat64(statbuf, &stat);
 169         return ret;
 170 }
 171
 172 asmlinkage long
 173 sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
 174 {
 175         struct kstat stat;
 176         int ret = vfs_fstat(fd, &stat);
 177         if (!ret)
 178                 ret = cp_stat64(statbuf, &stat);
 179         return ret;
 180 }
 181
 182 asmlinkage long
 183 sys32_fstatat(unsigned int dfd, char __user *filename,
 184               struct stat64 __user* statbuf, int flag)
 185 {
 186         struct kstat stat;
 187         int error = -EINVAL;
 188
 189         if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
 190                 goto out;
 191
 192         if (flag & AT_SYMLINK_NOFOLLOW)
 193                 error = vfs_lstat_fd(dfd, filename, &stat);
 194         else
 195                 error = vfs_stat_fd(dfd, filename, &stat);
 196
 197         if (!error)
 198                 error = cp_stat64(statbuf, &stat);
 199
 200 out:
 201         return error;
 202 }
 203
 204 /*
 205  * Linux/i386 didn't use to be able to handle more than
 206  * 4 system call parameters, so these system calls used a memory
 207  * block for parameter passing..
 208  */
 209
 210 struct mmap_arg_struct {
 211         unsigned int addr;
 212         unsigned int len;
 213         unsigned int prot;
 214         unsigned int flags;
 215         unsigned int fd;
 216         unsigned int offset;
 217 };
 218
 219 asmlinkage long
 220 sys32_mmap(struct mmap_arg_struct __user *arg)
 221 {
 222         struct mmap_arg_struct a;
 223         struct file *file = NULL;
 224         unsigned long retval;
 225         struct mm_struct *mm ;
 226
 227         if (copy_from_user(&a, arg, sizeof(a)))
 228                 return -EFAULT;
 229
 230         if (a.offset & ~PAGE_MASK)
 231                 return -EINVAL;
 232
 233         if (!(a.flags & MAP_ANONYMOUS)) {
 234                 file = fget(a.fd);
 235                 if (!file)
 236                         return -EBADF;
 237         }
 238
 239         mm = current->mm;
 240         down_write(&mm->mmap_sem);
 241         retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, a.offset>>PAGE_SHIFT);
 242         if (file)
 243                 fput(file);
 244
 245         up_write(&mm->mmap_sem);
 246
 247         return retval;
 248 }
 249
 250 asmlinkage long
 251 sys32_mprotect(unsigned long start, size_t len, unsigned long prot)
 252 {
 253         return sys_mprotect(start,len,prot);
 254 }
 255
 256 asmlinkage long
 257 sys32_pipe(int __user *fd)
 258 {
 259         int retval;
 260         int fds[2];
 261
 262         retval = do_pipe(fds);
 263         if (retval)
 264                 goto out;
 265         if (copy_to_user(fd, fds, sizeof(fds)))
 266                 retval = -EFAULT;
 267   out:
 268         return retval;
 269 }
 270
 271 asmlinkage long
 272 sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
 273                    struct sigaction32 __user *oact,  unsigned int sigsetsize)
 274 {
 275         struct k_sigaction new_ka, old_ka;
 276         int ret;
 277         compat_sigset_t set32;
 278
 279         /* XXX: Don't preclude handling different sized sigset_t's.  */
 280         if (sigsetsize != sizeof(compat_sigset_t))
 281                 return -EINVAL;
 282
 283         if (act) {
 284                 compat_uptr_t handler, restorer;
 285
 286                 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
 287                     __get_user(handler, &act->sa_handler) ||
 288                     __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
 289                     __get_user(restorer, &act->sa_restorer)||
 290                     __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t)))
 291                         return -EFAULT;
 292                 new_ka.sa.sa_handler = compat_ptr(handler);
 293                 new_ka.sa.sa_restorer = compat_ptr(restorer);
 294                 /* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */
 295                 switch (_NSIG_WORDS) {
 296                 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
 297                                 | (((long)set32.sig[7]) << 32);
 298                 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
 299                                 | (((long)set32.sig[5]) << 32);
 300                 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
 301                                 | (((long)set32.sig[3]) << 32);
 302                 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
 303                                 | (((long)set32.sig[1]) << 32);
 304                 }
 305         }
 306
 307         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 308
 309         if (!ret && oact) {
 310                 /* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */
 311                 switch (_NSIG_WORDS) {
 312                 case 4:
 313                         set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
 314                         set32.sig[6] = old_ka.sa.sa_mask.sig[3];
 315                 case 3:
 316                         set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
 317                         set32.sig[4] = old_ka.sa.sa_mask.sig[2];
 318                 case 2:
 319                         set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
 320                         set32.sig[2] = old_ka.sa.sa_mask.sig[1];
 321                 case 1:
 322                         set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
 323                         set32.sig[0] = old_ka.sa.sa_mask.sig[0];
 324                 }
 325                 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
 326                     __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) ||
 327                     __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) ||
 328                     __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
 329                     __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t)))
 330                         return -EFAULT;
 331         }
 332
 333         return ret;
 334 }
 335
 336 asmlinkage long
 337 sys32_sigaction (int sig, struct old_sigaction32 __user *act, struct old_sigaction32 __user *oact)
 338 {
 339         struct k_sigaction new_ka, old_ka;
 340         int ret;
 341
 342         if (act) {
 343                 compat_old_sigset_t mask;
 344                 compat_uptr_t handler, restorer;
 345
 346                 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
 347                     __get_user(handler, &act->sa_handler) ||
 348                     __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
 349                     __get_user(restorer, &act->sa_restorer) ||
 350                     __get_user(mask, &act->sa_mask))
 351                         return -EFAULT;
 352
 353                 new_ka.sa.sa_handler = compat_ptr(handler);
 354                 new_ka.sa.sa_restorer = compat_ptr(restorer);
 355
 356                 siginitset(&new_ka.sa.sa_mask, mask);
 357         }
 358
 359         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 360
 361         if (!ret && oact) {
 362                 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
 363                     __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) ||
 364                     __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) ||
 365                     __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
 366                     __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
 367                         return -EFAULT;
 368         }
 369
 370         return ret;
 371 }
 372
 373 asmlinkage long
 374 sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
 375                         compat_sigset_t __user *oset, unsigned int sigsetsize)
 376 {
 377         sigset_t s;
 378         compat_sigset_t s32;
 379         int ret;
 380         mm_segment_t old_fs = get_fs();
 381
 382         if (set) {
 383                 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
 384                         return -EFAULT;
 385                 switch (_NSIG_WORDS) {
 386                 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
 387                 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
 388                 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
 389                 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
 390                 }
 391         }
 392         set_fs (KERNEL_DS);
 393         ret = sys_rt_sigprocmask(how, set ? &s : NULL, oset ? &s : NULL,
 394                                  sigsetsize);
 395         set_fs (old_fs);
 396         if (ret) return ret;
 397         if (oset) {
 398                 switch (_NSIG_WORDS) {
 399                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 400                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 401                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 402                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 403                 }
 404                 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
 405                         return -EFAULT;
 406         }
 407         return 0;
 408 }
 409
 410 static inline long
 411 get_tv32(struct timeval *o, struct compat_timeval __user *i)
 412 {
 413         int err = -EFAULT;
 414         if (access_ok(VERIFY_READ, i, sizeof(*i))) {
 415                 err = __get_user(o->tv_sec, &i->tv_sec);
 416                 err |= __get_user(o->tv_usec, &i->tv_usec);
 417         }
 418         return err;
 419 }
 420
 421 static inline long
 422 put_tv32(struct compat_timeval __user *o, struct timeval *i)
 423 {
 424         int err = -EFAULT;
 425         if (access_ok(VERIFY_WRITE, o, sizeof(*o))) {
 426                 err = __put_user(i->tv_sec, &o->tv_sec);
 427                 err |= __put_user(i->tv_usec, &o->tv_usec);
 428         }
 429         return err;
 430 }
 431
 432 extern unsigned int alarm_setitimer(unsigned int seconds);
 433
 434 asmlinkage long
 435 sys32_alarm(unsigned int seconds)
 436 {
 437         return alarm_setitimer(seconds);
 438 }
 439
 440 /* Translations due to time_t size differences.  Which affects all
 441    sorts of things, like timeval and itimerval.  */
 442
 443 extern struct timezone sys_tz;
 444
 445 asmlinkage long
 446 sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 447 {
 448         if (tv) {
 449                 struct timeval ktv;
 450                 do_gettimeofday(&ktv);
 451                 if (put_tv32(tv, &ktv))
 452                         return -EFAULT;
 453         }
 454         if (tz) {
 455                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 456                         return -EFAULT;
 457         }
 458         return 0;
 459 }
 460
 461 asmlinkage long
 462 sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 463 {
 464         struct timeval ktv;
 465         struct timespec kts;
 466         struct timezone ktz;
 467
 468         if (tv) {
 469                 if (get_tv32(&ktv, tv))
 470                         return -EFAULT;
 471                 kts.tv_sec = ktv.tv_sec;
 472                 kts.tv_nsec = ktv.tv_usec * NSEC_PER_USEC;
 473         }
 474         if (tz) {
 475                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 476                         return -EFAULT;
 477         }
 478
 479         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 480 }
 481
 482 struct sel_arg_struct {
 483         unsigned int n;
 484         unsigned int inp;
 485         unsigned int outp;
 486         unsigned int exp;
 487         unsigned int tvp;
 488 };
 489
 490 asmlinkage long
 491 sys32_old_select(struct sel_arg_struct __user *arg)
 492 {
 493         struct sel_arg_struct a;
 494
 495         if (copy_from_user(&a, arg, sizeof(a)))
 496                 return -EFAULT;
 497         return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
 498                                  compat_ptr(a.exp), compat_ptr(a.tvp));
 499 }
 500
 501 extern asmlinkage long
 502 compat_sys_wait4(compat_pid_t pid, compat_uint_t * stat_addr, int options,
 503                  struct compat_rusage *ru);
 504
 505 asmlinkage long
 506 sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options)
 507 {
 508         return compat_sys_wait4(pid, stat_addr, options, NULL);
 509 }
 510
 511 /* 32-bit timeval and related flotsam.  */
 512
 513 asmlinkage long
 514 sys32_sysfs(int option, u32 arg1, u32 arg2)
 515 {
 516         return sys_sysfs(option, arg1, arg2);
 517 }
 518
 519 struct sysinfo32 {
 520         s32 uptime;
 521         u32 loads[3];
 522         u32 totalram;
 523         u32 freeram;
 524         u32 sharedram;
 525         u32 bufferram;
 526         u32 totalswap;
 527         u32 freeswap;
 528         unsigned short procs;
 529         unsigned short pad;
 530         u32 totalhigh;
 531         u32 freehigh;
 532         u32 mem_unit;
 533         char _f[20-2*sizeof(u32)-sizeof(int)];
 534 };
 535
 536 asmlinkage long
 537 sys32_sysinfo(struct sysinfo32 __user *info)
 538 {
 539         struct sysinfo s;
 540         int ret;
 541         mm_segment_t old_fs = get_fs ();
 542         int bitcount = 0;
 543
 544         set_fs (KERNEL_DS);
 545         ret = sys_sysinfo(&s);
 546         set_fs (old_fs);
 547
 548         /* Check to see if any memory value is too large for 32-bit and scale
 549          *  down if needed
 550          */
 551         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 552                 while (s.mem_unit < PAGE_SIZE) {
 553                         s.mem_unit <<= 1;
 554                         bitcount++;
 555                 }
 556                 s.totalram >>= bitcount;
 557                 s.freeram >>= bitcount;
 558                 s.sharedram >>= bitcount;
 559                 s.bufferram >>= bitcount;
 560                 s.totalswap >>= bitcount;
 561                 s.freeswap >>= bitcount;
 562                 s.totalhigh >>= bitcount;
 563                 s.freehigh >>= bitcount;
 564         }
 565
 566         if (!access_ok(VERIFY_WRITE, info, sizeof(struct sysinfo32)) ||
 567             __put_user (s.uptime, &info->uptime) ||
 568             __put_user (s.loads[0], &info->loads[0]) ||
 569             __put_user (s.loads[1], &info->loads[1]) ||
 570             __put_user (s.loads[2], &info->loads[2]) ||
 571             __put_user (s.totalram, &info->totalram) ||
 572             __put_user (s.freeram, &info->freeram) ||
 573             __put_user (s.sharedram, &info->sharedram) ||
 574             __put_user (s.bufferram, &info->bufferram) ||
 575             __put_user (s.totalswap, &info->totalswap) ||
 576             __put_user (s.freeswap, &info->freeswap) ||
 577             __put_user (s.procs, &info->procs) ||
 578             __put_user (s.totalhigh, &info->totalhigh) ||
 579             __put_user (s.freehigh, &info->freehigh) ||
 580             __put_user (s.mem_unit, &info->mem_unit))
 581                 return -EFAULT;
 582         return 0;
 583 }
 584
 585 asmlinkage long
 586 sys32_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
 587 {
 588         struct timespec t;
 589         int ret;
 590         mm_segment_t old_fs = get_fs ();
 591
 592         set_fs (KERNEL_DS);
 593         ret = sys_sched_rr_get_interval(pid, &t);
 594         set_fs (old_fs);
 595         if (put_compat_timespec(&t, interval))
 596                 return -EFAULT;
 597         return ret;
 598 }
 599
 600 asmlinkage long
 601 sys32_rt_sigpending(compat_sigset_t __user *set, compat_size_t sigsetsize)
 602 {
 603         sigset_t s;
 604         compat_sigset_t s32;
 605         int ret;
 606         mm_segment_t old_fs = get_fs();
 607
 608         set_fs (KERNEL_DS);
 609         ret = sys_rt_sigpending(&s, sigsetsize);
 610         set_fs (old_fs);
 611         if (!ret) {
 612                 switch (_NSIG_WORDS) {
 613                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 614                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 615                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 616                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 617                 }
 618                 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
 619                         return -EFAULT;
 620         }
 621         return ret;
 622 }
 623
 624 asmlinkage long
 625 sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
 626 {
 627         siginfo_t info;
 628         int ret;
 629         mm_segment_t old_fs = get_fs();
 630
 631         if (copy_siginfo_from_user32(&info, uinfo))
 632                 return -EFAULT;
 633         set_fs (KERNEL_DS);
 634         ret = sys_rt_sigqueueinfo(pid, sig, &info);
 635         set_fs (old_fs);
 636         return ret;
 637 }
 638
 639 /* These are here just in case some old ia32 binary calls it. */
 640 asmlinkage long
 641 sys32_pause(void)
 642 {
 643         current->state = TASK_INTERRUPTIBLE;
 644         schedule();
 645         return -ERESTARTNOHAND;
 646 }
 647
 648
 649 #ifdef CONFIG_SYSCTL
 650 struct sysctl_ia32 {
 651         unsigned int    name;
 652         int             nlen;
 653         unsigned int    oldval;
 654         unsigned int    oldlenp;
 655         unsigned int    newval;
 656         unsigned int    newlen;
 657         unsigned int    __unused[4];
 658 };
 659
 660
 661 asmlinkage long
 662 sys32_sysctl(struct sysctl_ia32 __user *args32)
 663 {
 664         struct sysctl_ia32 a32;
 665         mm_segment_t old_fs = get_fs ();
 666         void __user *oldvalp, *newvalp;
 667         size_t oldlen;
 668         int __user *namep;
 669         long ret;
 670         extern int do_sysctl(int *name, int nlen, void *oldval, size_t *oldlenp,
 671                      void *newval, size_t newlen);
 672
 673
 674         if (copy_from_user(&a32, args32, sizeof (a32)))
 675                 return -EFAULT;
 676
 677         /*
 678          * We need to pre-validate these because we have to disable address checking
 679          * before calling do_sysctl() because of OLDLEN but we can't run the risk of the
 680          * user specifying bad addresses here.  Well, since we're dealing with 32 bit
 681          * addresses, we KNOW that access_ok() will always succeed, so this is an
 682          * expensive NOP, but so what...
 683          */
 684         namep = compat_ptr(a32.name);
 685         oldvalp = compat_ptr(a32.oldval);
 686         newvalp =  compat_ptr(a32.newval);
 687
 688         if ((oldvalp && get_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
 689             || !access_ok(VERIFY_WRITE, namep, 0)
 690             || !access_ok(VERIFY_WRITE, oldvalp, 0)
 691             || !access_ok(VERIFY_WRITE, newvalp, 0))
 692                 return -EFAULT;
 693
 694         set_fs(KERNEL_DS);
 695         lock_kernel();
 696         ret = do_sysctl(namep, a32.nlen, oldvalp, &oldlen, newvalp, (size_t) a32.newlen);
 697         unlock_kernel();
 698         set_fs(old_fs);
 699
 700         if (oldvalp && put_user (oldlen, (int __user *)compat_ptr(a32.oldlenp)))
 701                 return -EFAULT;
 702
 703         return ret;
 704 }
 705 #endif
 706
 707 /* warning: next two assume little endian */
 708 asmlinkage long
 709 sys32_pread(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi)
 710 {
 711         return sys_pread64(fd, ubuf, count,
 712                          ((loff_t)AA(poshi) << 32) | AA(poslo));
 713 }
 714
 715 asmlinkage long
 716 sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi)
 717 {
 718         return sys_pwrite64(fd, ubuf, count,
 719                           ((loff_t)AA(poshi) << 32) | AA(poslo));
 720 }
 721
 722
 723 asmlinkage long
 724 sys32_personality(unsigned long personality)
 725 {
 726         int ret;
 727         if (personality(current->personality) == PER_LINUX32 &&
 728                 personality == PER_LINUX)
 729                 personality = PER_LINUX32;
 730         ret = sys_personality(personality);
 731         if (ret == PER_LINUX32)
 732                 ret = PER_LINUX;
 733         return ret;
 734 }
 735
 736 asmlinkage long
 737 sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
 738 {
 739         mm_segment_t old_fs = get_fs();
 740         int ret;
 741         off_t of;
 742
 743         if (offset && get_user(of, offset))
 744                 return -EFAULT;
 745
 746         set_fs(KERNEL_DS);
 747         ret = sys_sendfile(out_fd, in_fd, offset ? &of : NULL, count);
 748         set_fs(old_fs);
 749
 750         if (offset && put_user(of, offset))
 751                 return -EFAULT;
 752
 753         return ret;
 754 }
 755
 756 asmlinkage long sys32_mmap2(unsigned long addr, unsigned long len,
 757         unsigned long prot, unsigned long flags,
 758         unsigned long fd, unsigned long pgoff)
 759 {
 760         struct mm_struct *mm = current->mm;
 761         unsigned long error;
 762         struct file * file = NULL;
 763
 764         flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
 765         if (!(flags & MAP_ANONYMOUS)) {
 766                 file = fget(fd);
 767                 if (!file)
 768                         return -EBADF;
 769         }
 770
 771         down_write(&mm->mmap_sem);
 772         error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
 773         up_write(&mm->mmap_sem);
 774
 775         if (file)
 776                 fput(file);
 777         return error;
 778 }
 779
 780 asmlinkage long sys32_olduname(struct oldold_utsname __user * name)
 781 {
 782         int error;
 783
 784         if (!name)
 785                 return -EFAULT;
 786         if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
 787                 return -EFAULT;
 788
 789         down_read(&uts_sem);
 790
 791         error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
 792          __put_user(0,name->sysname+__OLD_UTS_LEN);
 793          __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
 794          __put_user(0,name->nodename+__OLD_UTS_LEN);
 795          __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
 796          __put_user(0,name->release+__OLD_UTS_LEN);
 797          __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
 798          __put_user(0,name->version+__OLD_UTS_LEN);
 799          {
 800                  char *arch = "x86_64";
 801                  if (personality(current->personality) == PER_LINUX32)
 802                          arch = "i686";
 803
 804                  __copy_to_user(&name->machine,arch,strlen(arch)+1);
 805          }
 806
 807          up_read(&uts_sem);
 808
 809          error = error ? -EFAULT : 0;
 810
 811          return error;
 812 }
 813
 814 long sys32_uname(struct old_utsname __user * name)
 815 {
 816         int err;
 817         if (!name)
 818                 return -EFAULT;
 819         down_read(&uts_sem);
 820         err=copy_to_user(name, &system_utsname, sizeof (*name));
 821         up_read(&uts_sem);
 822         if (personality(current->personality) == PER_LINUX32)
 823                 err |= copy_to_user(&name->machine, "i686", 5);
 824         return err?-EFAULT:0;
 825 }
 826
 827 long sys32_ustat(unsigned dev, struct ustat32 __user *u32p)
 828 {
 829         struct ustat u;
 830         mm_segment_t seg;
 831         int ret;
 832
 833         seg = get_fs();
 834         set_fs(KERNEL_DS);
 835         ret = sys_ustat(dev,&u);
 836         set_fs(seg);
 837         if (ret >= 0) {
 838                 if (!access_ok(VERIFY_WRITE,u32p,sizeof(struct ustat32)) ||
 839                     __put_user((__u32) u.f_tfree, &u32p->f_tfree) ||
 840                     __put_user((__u32) u.f_tinode, &u32p->f_tfree) ||
 841                     __copy_to_user(&u32p->f_fname, u.f_fname, sizeof(u.f_fname)) ||
 842                     __copy_to_user(&u32p->f_fpack, u.f_fpack, sizeof(u.f_fpack)))
 843                         ret = -EFAULT;
 844         }
 845         return ret;
 846 }
 847
 848 asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
 849                              compat_uptr_t __user *envp, struct pt_regs *regs)
 850 {
 851         long error;
 852         char * filename;
 853
 854         filename = getname(name);
 855         error = PTR_ERR(filename);
 856         if (IS_ERR(filename))
 857                 return error;
 858         error = compat_do_execve(filename, argv, envp, regs);
 859         if (error == 0) {
 860                 task_lock(current);
 861                 current->ptrace &= ~PT_DTRACE;
 862                 task_unlock(current);
 863         }
 864         putname(filename);
 865         return error;
 866 }
 867
 868 asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
 869                             struct pt_regs *regs)
 870 {
 871         void __user *parent_tid = (void __user *)regs->rdx;
 872         void __user *child_tid = (void __user *)regs->rdi;
 873         if (!newsp)
 874                 newsp = regs->rsp;
 875         return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
 876 }
 877
 878 /*
 879  * Some system calls that need sign extended arguments. This could be done by a generic wrapper.
 880  */
 881
 882 long sys32_lseek (unsigned int fd, int offset, unsigned int whence)
 883 {
 884         return sys_lseek(fd, offset, whence);
 885 }
 886
 887 long sys32_kill(int pid, int sig)
 888 {
 889         return sys_kill(pid, sig);
 890 }
 891
 892 long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
 893                         __u32 len_low, __u32 len_high, int advice)
 894 {
 895         return sys_fadvise64_64(fd,
 896                                (((u64)offset_high)<<32) | offset_low,
 897                                (((u64)len_high)<<32) | len_low,
 898                                advice);
 899 }
 900
 901 long sys32_vm86_warning(void)
 902 {
 903         struct task_struct *me = current;
 904         static char lastcomm[sizeof(me->comm)];
 905         if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
 906                 compat_printk(KERN_INFO "%s: vm86 mode not supported on 64 bit kernel\n",
 907                        me->comm);
 908                 strncpy(lastcomm, me->comm, sizeof(lastcomm));
 909         }
 910         return -ENOSYS;
 911 }
 912
 913 long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
 914                           char __user * buf, size_t len)
 915 {
 916         return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len);
 917 }
 918