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/timex.h>
  34 #include <linux/smp.h>
  35 #include <linux/smp_lock.h>
  36 #include <linux/sem.h>
  37 #include <linux/msg.h>
  38 #include <linux/mm.h>
  39 #include <linux/shm.h>
  40 #include <linux/slab.h>
  41 #include <linux/uio.h>
  42 #include <linux/nfs_fs.h>
  43 #include <linux/quota.h>
  44 #include <linux/module.h>
  45 #include <linux/sunrpc/svc.h>
  46 #include <linux/nfsd/nfsd.h>
  47 #include <linux/nfsd/cache.h>
  48 #include <linux/nfsd/xdr.h>
  49 #include <linux/nfsd/syscall.h>
  50 #include <linux/poll.h>
  51 #include <linux/personality.h>
  52 #include <linux/stat.h>
  53 #include <linux/ipc.h>
  54 #include <linux/rwsem.h>
  55 #include <linux/binfmts.h>
  56 #include <linux/init.h>
  57 #include <linux/aio_abi.h>
  58 #include <linux/aio.h>
  59 #include <linux/compat.h>
  60 #include <linux/vfs.h>
  61 #include <linux/ptrace.h>
  62 #include <linux/highuid.h>
  63 #include <linux/vmalloc.h>
  64 #include <linux/fsnotify.h>
  65 #include <asm/mman.h>
  66 #include <asm/types.h>
  67 #include <asm/uaccess.h>
  68 #include <asm/semaphore.h>
  69 #include <asm/atomic.h>
  70 #include <asm/ldt.h>
  71
  72 #include <net/scm.h>
  73 #include <net/sock.h>
  74 #include <asm/ia32.h>
  75
  76 #define AA(__x)         ((unsigned long)(__x))
  77
  78 int cp_compat_stat(struct kstat *kbuf, struct compat_stat __user *ubuf)
  79 {
  80         typeof(ubuf->st_uid) uid = 0;
  81         typeof(ubuf->st_gid) gid = 0;
  82         SET_UID(uid, kbuf->uid);
  83         SET_GID(gid, kbuf->gid);
  84         if (!old_valid_dev(kbuf->dev) || !old_valid_dev(kbuf->rdev))
  85                 return -EOVERFLOW;
  86         if (kbuf->size >= 0x7fffffff)
  87                 return -EOVERFLOW;
  88         if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct compat_stat)) ||
  89             __put_user (old_encode_dev(kbuf->dev), &ubuf->st_dev) ||
  90             __put_user (kbuf->ino, &ubuf->st_ino) ||
  91             __put_user (kbuf->mode, &ubuf->st_mode) ||
  92             __put_user (kbuf->nlink, &ubuf->st_nlink) ||
  93             __put_user (uid, &ubuf->st_uid) ||
  94             __put_user (gid, &ubuf->st_gid) ||
  95             __put_user (old_encode_dev(kbuf->rdev), &ubuf->st_rdev) ||
  96             __put_user (kbuf->size, &ubuf->st_size) ||
  97             __put_user (kbuf->atime.tv_sec, &ubuf->st_atime) ||
  98             __put_user (kbuf->atime.tv_nsec, &ubuf->st_atime_nsec) ||
  99             __put_user (kbuf->mtime.tv_sec, &ubuf->st_mtime) ||
 100             __put_user (kbuf->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
 101             __put_user (kbuf->ctime.tv_sec, &ubuf->st_ctime) ||
 102             __put_user (kbuf->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
 103             __put_user (kbuf->blksize, &ubuf->st_blksize) ||
 104             __put_user (kbuf->blocks, &ubuf->st_blocks))
 105                 return -EFAULT;
 106         return 0;
 107 }
 108
 109 asmlinkage long
 110 sys32_truncate64(char __user * filename, unsigned long offset_low, unsigned long offset_high)
 111 {
 112        return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
 113 }
 114
 115 asmlinkage long
 116 sys32_ftruncate64(unsigned int fd, unsigned long offset_low, unsigned long offset_high)
 117 {
 118        return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
 119 }
 120
 121 /* Another set for IA32/LFS -- x86_64 struct stat is different due to
 122    support for 64bit inode numbers. */
 123
 124 static int
 125 cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
 126 {
 127         typeof(ubuf->st_uid) uid = 0;
 128         typeof(ubuf->st_gid) gid = 0;
 129         SET_UID(uid, stat->uid);
 130         SET_GID(gid, stat->gid);
 131         if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
 132             __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
 133             __put_user (stat->ino, &ubuf->__st_ino) ||
 134             __put_user (stat->ino, &ubuf->st_ino) ||
 135             __put_user (stat->mode, &ubuf->st_mode) ||
 136             __put_user (stat->nlink, &ubuf->st_nlink) ||
 137             __put_user (uid, &ubuf->st_uid) ||
 138             __put_user (gid, &ubuf->st_gid) ||
 139             __put_user (huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||
 140             __put_user (stat->size, &ubuf->st_size) ||
 141             __put_user (stat->atime.tv_sec, &ubuf->st_atime) ||
 142             __put_user (stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||
 143             __put_user (stat->mtime.tv_sec, &ubuf->st_mtime) ||
 144             __put_user (stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
 145             __put_user (stat->ctime.tv_sec, &ubuf->st_ctime) ||
 146             __put_user (stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
 147             __put_user (stat->blksize, &ubuf->st_blksize) ||
 148             __put_user (stat->blocks, &ubuf->st_blocks))
 149                 return -EFAULT;
 150         return 0;
 151 }
 152
 153 asmlinkage long
 154 sys32_stat64(char __user * filename, struct stat64 __user *statbuf)
 155 {
 156         struct kstat stat;
 157         int ret = vfs_stat(filename, &stat);
 158         if (!ret)
 159                 ret = cp_stat64(statbuf, &stat);
 160         return ret;
 161 }
 162
 163 asmlinkage long
 164 sys32_lstat64(char __user * filename, struct stat64 __user *statbuf)
 165 {
 166         struct kstat stat;
 167         int ret = vfs_lstat(filename, &stat);
 168         if (!ret)
 169                 ret = cp_stat64(statbuf, &stat);
 170         return ret;
 171 }
 172
 173 asmlinkage long
 174 sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
 175 {
 176         struct kstat stat;
 177         int ret = vfs_fstat(fd, &stat);
 178         if (!ret)
 179                 ret = cp_stat64(statbuf, &stat);
 180         return ret;
 181 }
 182
 183 asmlinkage long
 184 sys32_fstatat(unsigned int dfd, char __user *filename,
 185               struct stat64 __user* statbuf, int flag)
 186 {
 187         struct kstat stat;
 188         int error = -EINVAL;
 189
 190         if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
 191                 goto out;
 192
 193         if (flag & AT_SYMLINK_NOFOLLOW)
 194                 error = vfs_lstat_fd(dfd, filename, &stat);
 195         else
 196                 error = vfs_stat_fd(dfd, filename, &stat);
 197
 198         if (!error)
 199                 error = cp_stat64(statbuf, &stat);
 200
 201 out:
 202         return error;
 203 }
 204
 205 /*
 206  * Linux/i386 didn't use to be able to handle more than
 207  * 4 system call parameters, so these system calls used a memory
 208  * block for parameter passing..
 209  */
 210
 211 struct mmap_arg_struct {
 212         unsigned int addr;
 213         unsigned int len;
 214         unsigned int prot;
 215         unsigned int flags;
 216         unsigned int fd;
 217         unsigned int offset;
 218 };
 219
 220 asmlinkage long
 221 sys32_mmap(struct mmap_arg_struct __user *arg)
 222 {
 223         struct mmap_arg_struct a;
 224         struct file *file = NULL;
 225         unsigned long retval;
 226         struct mm_struct *mm ;
 227
 228         if (copy_from_user(&a, arg, sizeof(a)))
 229                 return -EFAULT;
 230
 231         if (a.offset & ~PAGE_MASK)
 232                 return -EINVAL;
 233
 234         if (!(a.flags & MAP_ANONYMOUS)) {
 235                 file = fget(a.fd);
 236                 if (!file)
 237                         return -EBADF;
 238         }
 239
 240         mm = current->mm;
 241         down_write(&mm->mmap_sem);
 242         retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags, a.offset>>PAGE_SHIFT);
 243         if (file)
 244                 fput(file);
 245
 246         up_write(&mm->mmap_sem);
 247
 248         return retval;
 249 }
 250
 251 asmlinkage long
 252 sys32_mprotect(unsigned long start, size_t len, unsigned long prot)
 253 {
 254         return sys_mprotect(start,len,prot);
 255 }
 256
 257 asmlinkage long
 258 sys32_pipe(int __user *fd)
 259 {
 260         int retval;
 261         int fds[2];
 262
 263         retval = do_pipe(fds);
 264         if (retval)
 265                 goto out;
 266         if (copy_to_user(fd, fds, sizeof(fds)))
 267                 retval = -EFAULT;
 268   out:
 269         return retval;
 270 }
 271
 272 asmlinkage long
 273 sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
 274                    struct sigaction32 __user *oact,  unsigned int sigsetsize)
 275 {
 276         struct k_sigaction new_ka, old_ka;
 277         int ret;
 278         compat_sigset_t set32;
 279
 280         /* XXX: Don't preclude handling different sized sigset_t's.  */
 281         if (sigsetsize != sizeof(compat_sigset_t))
 282                 return -EINVAL;
 283
 284         if (act) {
 285                 compat_uptr_t handler, restorer;
 286
 287                 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
 288                     __get_user(handler, &act->sa_handler) ||
 289                     __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
 290                     __get_user(restorer, &act->sa_restorer)||
 291                     __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t)))
 292                         return -EFAULT;
 293                 new_ka.sa.sa_handler = compat_ptr(handler);
 294                 new_ka.sa.sa_restorer = compat_ptr(restorer);
 295                 /* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */
 296                 switch (_NSIG_WORDS) {
 297                 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
 298                                 | (((long)set32.sig[7]) << 32);
 299                 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
 300                                 | (((long)set32.sig[5]) << 32);
 301                 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
 302                                 | (((long)set32.sig[3]) << 32);
 303                 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
 304                                 | (((long)set32.sig[1]) << 32);
 305                 }
 306         }
 307
 308         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 309
 310         if (!ret && oact) {
 311                 /* FIXME: here we rely on _COMPAT_NSIG_WORS to be >= than _NSIG_WORDS << 1 */
 312                 switch (_NSIG_WORDS) {
 313                 case 4:
 314                         set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
 315                         set32.sig[6] = old_ka.sa.sa_mask.sig[3];
 316                 case 3:
 317                         set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
 318                         set32.sig[4] = old_ka.sa.sa_mask.sig[2];
 319                 case 2:
 320                         set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
 321                         set32.sig[2] = old_ka.sa.sa_mask.sig[1];
 322                 case 1:
 323                         set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
 324                         set32.sig[0] = old_ka.sa.sa_mask.sig[0];
 325                 }
 326                 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
 327                     __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) ||
 328                     __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) ||
 329                     __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
 330                     __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t)))
 331                         return -EFAULT;
 332         }
 333
 334         return ret;
 335 }
 336
 337 asmlinkage long
 338 sys32_sigaction (int sig, struct old_sigaction32 __user *act, struct old_sigaction32 __user *oact)
 339 {
 340         struct k_sigaction new_ka, old_ka;
 341         int ret;
 342
 343         if (act) {
 344                 compat_old_sigset_t mask;
 345                 compat_uptr_t handler, restorer;
 346
 347                 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
 348                     __get_user(handler, &act->sa_handler) ||
 349                     __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
 350                     __get_user(restorer, &act->sa_restorer) ||
 351                     __get_user(mask, &act->sa_mask))
 352                         return -EFAULT;
 353
 354                 new_ka.sa.sa_handler = compat_ptr(handler);
 355                 new_ka.sa.sa_restorer = compat_ptr(restorer);
 356
 357                 siginitset(&new_ka.sa.sa_mask, mask);
 358         }
 359
 360         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 361
 362         if (!ret && oact) {
 363                 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
 364                     __put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler) ||
 365                     __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer) ||
 366                     __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
 367                     __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
 368                         return -EFAULT;
 369         }
 370
 371         return ret;
 372 }
 373
 374 asmlinkage long
 375 sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
 376                         compat_sigset_t __user *oset, unsigned int sigsetsize)
 377 {
 378         sigset_t s;
 379         compat_sigset_t s32;
 380         int ret;
 381         mm_segment_t old_fs = get_fs();
 382
 383         if (set) {
 384                 if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
 385                         return -EFAULT;
 386                 switch (_NSIG_WORDS) {
 387                 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
 388                 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
 389                 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
 390                 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
 391                 }
 392         }
 393         set_fs (KERNEL_DS);
 394         ret = sys_rt_sigprocmask(how, set ? &s : NULL, oset ? &s : NULL,
 395                                  sigsetsize);
 396         set_fs (old_fs);
 397         if (ret) return ret;
 398         if (oset) {
 399                 switch (_NSIG_WORDS) {
 400                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 401                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 402                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 403                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 404                 }
 405                 if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
 406                         return -EFAULT;
 407         }
 408         return 0;
 409 }
 410
 411 static inline long
 412 get_tv32(struct timeval *o, struct compat_timeval __user *i)
 413 {
 414         int err = -EFAULT;
 415         if (access_ok(VERIFY_READ, i, sizeof(*i))) {
 416                 err = __get_user(o->tv_sec, &i->tv_sec);
 417                 err |= __get_user(o->tv_usec, &i->tv_usec);
 418         }
 419         return err;
 420 }
 421
 422 static inline long
 423 put_tv32(struct compat_timeval __user *o, struct timeval *i)
 424 {
 425         int err = -EFAULT;
 426         if (access_ok(VERIFY_WRITE, o, sizeof(*o))) {
 427                 err = __put_user(i->tv_sec, &o->tv_sec);
 428                 err |= __put_user(i->tv_usec, &o->tv_usec);
 429         }
 430         return err;
 431 }
 432
 433 extern unsigned int alarm_setitimer(unsigned int seconds);
 434
 435 asmlinkage long
 436 sys32_alarm(unsigned int seconds)
 437 {
 438         return alarm_setitimer(seconds);
 439 }
 440
 441 /* Translations due to time_t size differences.  Which affects all
 442    sorts of things, like timeval and itimerval.  */
 443
 444 extern struct timezone sys_tz;
 445
 446 asmlinkage long
 447 sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 448 {
 449         if (tv) {
 450                 struct timeval ktv;
 451                 do_gettimeofday(&ktv);
 452                 if (put_tv32(tv, &ktv))
 453                         return -EFAULT;
 454         }
 455         if (tz) {
 456                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 457                         return -EFAULT;
 458         }
 459         return 0;
 460 }
 461
 462 asmlinkage long
 463 sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 464 {
 465         struct timeval ktv;
 466         struct timespec kts;
 467         struct timezone ktz;
 468
 469         if (tv) {
 470                 if (get_tv32(&ktv, tv))
 471                         return -EFAULT;
 472                 kts.tv_sec = ktv.tv_sec;
 473                 kts.tv_nsec = ktv.tv_usec * NSEC_PER_USEC;
 474         }
 475         if (tz) {
 476                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 477                         return -EFAULT;
 478         }
 479
 480         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 481 }
 482
 483 struct sel_arg_struct {
 484         unsigned int n;
 485         unsigned int inp;
 486         unsigned int outp;
 487         unsigned int exp;
 488         unsigned int tvp;
 489 };
 490
 491 asmlinkage long
 492 sys32_old_select(struct sel_arg_struct __user *arg)
 493 {
 494         struct sel_arg_struct a;
 495
 496         if (copy_from_user(&a, arg, sizeof(a)))
 497                 return -EFAULT;
 498         return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
 499                                  compat_ptr(a.exp), compat_ptr(a.tvp));
 500 }
 501
 502 extern asmlinkage long
 503 compat_sys_wait4(compat_pid_t pid, compat_uint_t * stat_addr, int options,
 504                  struct compat_rusage *ru);
 505
 506 asmlinkage long
 507 sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options)
 508 {
 509         return compat_sys_wait4(pid, stat_addr, options, NULL);
 510 }
 511
 512 int sys32_ni_syscall(int call)
 513 {
 514         struct task_struct *me = current;
 515         static char lastcomm[sizeof(me->comm)];
 516
 517         if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
 518                 printk(KERN_INFO "IA32 syscall %d from %s not implemented\n",
 519                        call, me->comm);
 520                 strncpy(lastcomm, me->comm, sizeof(lastcomm));
 521         }
 522         return -ENOSYS;
 523 }
 524
 525 /* 32-bit timeval and related flotsam.  */
 526
 527 asmlinkage long
 528 sys32_sysfs(int option, u32 arg1, u32 arg2)
 529 {
 530         return sys_sysfs(option, arg1, arg2);
 531 }
 532
 533 struct sysinfo32 {
 534         s32 uptime;
 535         u32 loads[3];
 536         u32 totalram;
 537         u32 freeram;
 538         u32 sharedram;
 539         u32 bufferram;
 540         u32 totalswap;
 541         u32 freeswap;
 542         unsigned short procs;
 543         unsigned short pad;
 544         u32 totalhigh;
 545         u32 freehigh;
 546         u32 mem_unit;
 547         char _f[20-2*sizeof(u32)-sizeof(int)];
 548 };
 549
 550 asmlinkage long
 551 sys32_sysinfo(struct sysinfo32 __user *info)
 552 {
 553         struct sysinfo s;
 554         int ret;
 555         mm_segment_t old_fs = get_fs ();
 556         int bitcount = 0;
 557
 558         set_fs (KERNEL_DS);
 559         ret = sys_sysinfo(&s);
 560         set_fs (old_fs);
 561
 562         /* Check to see if any memory value is too large for 32-bit and scale
 563          *  down if needed
 564          */
 565         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 566                 while (s.mem_unit < PAGE_SIZE) {
 567                         s.mem_unit <<= 1;
 568                         bitcount++;
 569                 }
 570                 s.totalram >>= bitcount;
 571                 s.freeram >>= bitcount;
 572                 s.sharedram >>= bitcount;
 573                 s.bufferram >>= bitcount;
 574                 s.totalswap >>= bitcount;
 575                 s.freeswap >>= bitcount;
 576                 s.totalhigh >>= bitcount;
 577                 s.freehigh >>= bitcount;
 578         }
 579
 580         if (!access_ok(VERIFY_WRITE, info, sizeof(struct sysinfo32)) ||
 581             __put_user (s.uptime, &info->uptime) ||
 582             __put_user (s.loads[0], &info->loads[0]) ||
 583             __put_user (s.loads[1], &info->loads[1]) ||
 584             __put_user (s.loads[2], &info->loads[2]) ||
 585             __put_user (s.totalram, &info->totalram) ||
 586             __put_user (s.freeram, &info->freeram) ||
 587             __put_user (s.sharedram, &info->sharedram) ||
 588             __put_user (s.bufferram, &info->bufferram) ||
 589             __put_user (s.totalswap, &info->totalswap) ||
 590             __put_user (s.freeswap, &info->freeswap) ||
 591             __put_user (s.procs, &info->procs) ||
 592             __put_user (s.totalhigh, &info->totalhigh) ||
 593             __put_user (s.freehigh, &info->freehigh) ||
 594             __put_user (s.mem_unit, &info->mem_unit))
 595                 return -EFAULT;
 596         return 0;
 597 }
 598
 599 asmlinkage long
 600 sys32_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
 601 {
 602         struct timespec t;
 603         int ret;
 604         mm_segment_t old_fs = get_fs ();
 605
 606         set_fs (KERNEL_DS);
 607         ret = sys_sched_rr_get_interval(pid, &t);
 608         set_fs (old_fs);
 609         if (put_compat_timespec(&t, interval))
 610                 return -EFAULT;
 611         return ret;
 612 }
 613
 614 asmlinkage long
 615 sys32_rt_sigpending(compat_sigset_t __user *set, compat_size_t sigsetsize)
 616 {
 617         sigset_t s;
 618         compat_sigset_t s32;
 619         int ret;
 620         mm_segment_t old_fs = get_fs();
 621
 622         set_fs (KERNEL_DS);
 623         ret = sys_rt_sigpending(&s, sigsetsize);
 624         set_fs (old_fs);
 625         if (!ret) {
 626                 switch (_NSIG_WORDS) {
 627                 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
 628                 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
 629                 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
 630                 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
 631                 }
 632                 if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
 633                         return -EFAULT;
 634         }
 635         return ret;
 636 }
 637
 638 asmlinkage long
 639 sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
 640 {
 641         siginfo_t info;
 642         int ret;
 643         mm_segment_t old_fs = get_fs();
 644
 645         if (copy_siginfo_from_user32(&info, uinfo))
 646                 return -EFAULT;
 647         set_fs (KERNEL_DS);
 648         ret = sys_rt_sigqueueinfo(pid, sig, &info);
 649         set_fs (old_fs);
 650         return ret;
 651 }
 652
 653 /* These are here just in case some old ia32 binary calls it. */
 654 asmlinkage long
 655 sys32_pause(void)
 656 {
 657         current->state = TASK_INTERRUPTIBLE;
 658         schedule();
 659         return -ERESTARTNOHAND;
 660 }
 661
 662
 663 #ifdef CONFIG_SYSCTL
 664 struct sysctl_ia32 {
 665         unsigned int    name;
 666         int             nlen;
 667         unsigned int    oldval;
 668         unsigned int    oldlenp;
 669         unsigned int    newval;
 670         unsigned int    newlen;
 671         unsigned int    __unused[4];
 672 };
 673
 674
 675 asmlinkage long
 676 sys32_sysctl(struct sysctl_ia32 __user *args32)
 677 {
 678         struct sysctl_ia32 a32;
 679         mm_segment_t old_fs = get_fs ();
 680         void __user *oldvalp, *newvalp;
 681         size_t oldlen;
 682         int __user *namep;
 683         long ret;
 684         extern int do_sysctl(int *name, int nlen, void *oldval, size_t *oldlenp,
 685                      void *newval, size_t newlen);
 686
 687
 688         if (copy_from_user(&a32, args32, sizeof (a32)))
 689                 return -EFAULT;
 690
 691         /*
 692          * We need to pre-validate these because we have to disable address checking
 693          * before calling do_sysctl() because of OLDLEN but we can't run the risk of the
 694          * user specifying bad addresses here.  Well, since we're dealing with 32 bit
 695          * addresses, we KNOW that access_ok() will always succeed, so this is an
 696          * expensive NOP, but so what...
 697          */
 698         namep = compat_ptr(a32.name);
 699         oldvalp = compat_ptr(a32.oldval);
 700         newvalp =  compat_ptr(a32.newval);
 701
 702         if ((oldvalp && get_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
 703             || !access_ok(VERIFY_WRITE, namep, 0)
 704             || !access_ok(VERIFY_WRITE, oldvalp, 0)
 705             || !access_ok(VERIFY_WRITE, newvalp, 0))
 706                 return -EFAULT;
 707
 708         set_fs(KERNEL_DS);
 709         lock_kernel();
 710         ret = do_sysctl(namep, a32.nlen, oldvalp, &oldlen, newvalp, (size_t) a32.newlen);
 711         unlock_kernel();
 712         set_fs(old_fs);
 713
 714         if (oldvalp && put_user (oldlen, (int __user *)compat_ptr(a32.oldlenp)))
 715                 return -EFAULT;
 716
 717         return ret;
 718 }
 719 #endif
 720
 721 /* warning: next two assume little endian */
 722 asmlinkage long
 723 sys32_pread(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi)
 724 {
 725         return sys_pread64(fd, ubuf, count,
 726                          ((loff_t)AA(poshi) << 32) | AA(poslo));
 727 }
 728
 729 asmlinkage long
 730 sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count, u32 poslo, u32 poshi)
 731 {
 732         return sys_pwrite64(fd, ubuf, count,
 733                           ((loff_t)AA(poshi) << 32) | AA(poslo));
 734 }
 735
 736
 737 asmlinkage long
 738 sys32_personality(unsigned long personality)
 739 {
 740         int ret;
 741         if (personality(current->personality) == PER_LINUX32 &&
 742                 personality == PER_LINUX)
 743                 personality = PER_LINUX32;
 744         ret = sys_personality(personality);
 745         if (ret == PER_LINUX32)
 746                 ret = PER_LINUX;
 747         return ret;
 748 }
 749
 750 asmlinkage long
 751 sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
 752 {
 753         mm_segment_t old_fs = get_fs();
 754         int ret;
 755         off_t of;
 756
 757         if (offset && get_user(of, offset))
 758                 return -EFAULT;
 759
 760         set_fs(KERNEL_DS);
 761         ret = sys_sendfile(out_fd, in_fd, offset ? &of : NULL, count);
 762         set_fs(old_fs);
 763
 764         if (offset && put_user(of, offset))
 765                 return -EFAULT;
 766
 767         return ret;
 768 }
 769
 770 /* Handle adjtimex compatibility. */
 771
 772 extern int do_adjtimex(struct timex *);
 773
 774 asmlinkage long
 775 sys32_adjtimex(struct compat_timex __user *utp)
 776 {
 777         struct timex txc;
 778         int ret;
 779
 780         memset(&txc, 0, sizeof(struct timex));
 781
 782         if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) ||
 783            __get_user(txc.modes, &utp->modes) ||
 784            __get_user(txc.offset, &utp->offset) ||
 785            __get_user(txc.freq, &utp->freq) ||
 786            __get_user(txc.maxerror, &utp->maxerror) ||
 787            __get_user(txc.esterror, &utp->esterror) ||
 788            __get_user(txc.status, &utp->status) ||
 789            __get_user(txc.constant, &utp->constant) ||
 790            __get_user(txc.precision, &utp->precision) ||
 791            __get_user(txc.tolerance, &utp->tolerance) ||
 792            __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 793            __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 794            __get_user(txc.tick, &utp->tick) ||
 795            __get_user(txc.ppsfreq, &utp->ppsfreq) ||
 796            __get_user(txc.jitter, &utp->jitter) ||
 797            __get_user(txc.shift, &utp->shift) ||
 798            __get_user(txc.stabil, &utp->stabil) ||
 799            __get_user(txc.jitcnt, &utp->jitcnt) ||
 800            __get_user(txc.calcnt, &utp->calcnt) ||
 801            __get_user(txc.errcnt, &utp->errcnt) ||
 802            __get_user(txc.stbcnt, &utp->stbcnt))
 803                 return -EFAULT;
 804
 805         ret = do_adjtimex(&txc);
 806
 807         if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) ||
 808            __put_user(txc.modes, &utp->modes) ||
 809            __put_user(txc.offset, &utp->offset) ||
 810            __put_user(txc.freq, &utp->freq) ||
 811            __put_user(txc.maxerror, &utp->maxerror) ||
 812            __put_user(txc.esterror, &utp->esterror) ||
 813            __put_user(txc.status, &utp->status) ||
 814            __put_user(txc.constant, &utp->constant) ||
 815            __put_user(txc.precision, &utp->precision) ||
 816            __put_user(txc.tolerance, &utp->tolerance) ||
 817            __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
 818            __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
 819            __put_user(txc.tick, &utp->tick) ||
 820            __put_user(txc.ppsfreq, &utp->ppsfreq) ||
 821            __put_user(txc.jitter, &utp->jitter) ||
 822            __put_user(txc.shift, &utp->shift) ||
 823            __put_user(txc.stabil, &utp->stabil) ||
 824            __put_user(txc.jitcnt, &utp->jitcnt) ||
 825            __put_user(txc.calcnt, &utp->calcnt) ||
 826            __put_user(txc.errcnt, &utp->errcnt) ||
 827            __put_user(txc.stbcnt, &utp->stbcnt))
 828                 ret = -EFAULT;
 829
 830         return ret;
 831 }
 832
 833 asmlinkage long sys32_mmap2(unsigned long addr, unsigned long len,
 834         unsigned long prot, unsigned long flags,
 835         unsigned long fd, unsigned long pgoff)
 836 {
 837         struct mm_struct *mm = current->mm;
 838         unsigned long error;
 839         struct file * file = NULL;
 840
 841         flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
 842         if (!(flags & MAP_ANONYMOUS)) {
 843                 file = fget(fd);
 844                 if (!file)
 845                         return -EBADF;
 846         }
 847
 848         down_write(&mm->mmap_sem);
 849         error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
 850         up_write(&mm->mmap_sem);
 851
 852         if (file)
 853                 fput(file);
 854         return error;
 855 }
 856
 857 asmlinkage long sys32_olduname(struct oldold_utsname __user * name)
 858 {
 859         int error;
 860
 861         if (!name)
 862                 return -EFAULT;
 863         if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
 864                 return -EFAULT;
 865
 866         down_read(&uts_sem);
 867
 868         error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
 869          __put_user(0,name->sysname+__OLD_UTS_LEN);
 870          __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
 871          __put_user(0,name->nodename+__OLD_UTS_LEN);
 872          __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
 873          __put_user(0,name->release+__OLD_UTS_LEN);
 874          __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
 875          __put_user(0,name->version+__OLD_UTS_LEN);
 876          {
 877                  char *arch = "x86_64";
 878                  if (personality(current->personality) == PER_LINUX32)
 879                          arch = "i686";
 880
 881                  __copy_to_user(&name->machine,arch,strlen(arch)+1);
 882          }
 883
 884          up_read(&uts_sem);
 885
 886          error = error ? -EFAULT : 0;
 887
 888          return error;
 889 }
 890
 891 long sys32_uname(struct old_utsname __user * name)
 892 {
 893         int err;
 894         if (!name)
 895                 return -EFAULT;
 896         down_read(&uts_sem);
 897         err=copy_to_user(name, &system_utsname, sizeof (*name));
 898         up_read(&uts_sem);
 899         if (personality(current->personality) == PER_LINUX32)
 900                 err |= copy_to_user(&name->machine, "i686", 5);
 901         return err?-EFAULT:0;
 902 }
 903
 904 long sys32_ustat(unsigned dev, struct ustat32 __user *u32p)
 905 {
 906         struct ustat u;
 907         mm_segment_t seg;
 908         int ret;
 909
 910         seg = get_fs();
 911         set_fs(KERNEL_DS);
 912         ret = sys_ustat(dev,&u);
 913         set_fs(seg);
 914         if (ret >= 0) {
 915                 if (!access_ok(VERIFY_WRITE,u32p,sizeof(struct ustat32)) ||
 916                     __put_user((__u32) u.f_tfree, &u32p->f_tfree) ||
 917                     __put_user((__u32) u.f_tinode, &u32p->f_tfree) ||
 918                     __copy_to_user(&u32p->f_fname, u.f_fname, sizeof(u.f_fname)) ||
 919                     __copy_to_user(&u32p->f_fpack, u.f_fpack, sizeof(u.f_fpack)))
 920                         ret = -EFAULT;
 921         }
 922         return ret;
 923 }
 924
 925 asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
 926                              compat_uptr_t __user *envp, struct pt_regs *regs)
 927 {
 928         long error;
 929         char * filename;
 930
 931         filename = getname(name);
 932         error = PTR_ERR(filename);
 933         if (IS_ERR(filename))
 934                 return error;
 935         error = compat_do_execve(filename, argv, envp, regs);
 936         if (error == 0) {
 937                 task_lock(current);
 938                 current->ptrace &= ~PT_DTRACE;
 939                 task_unlock(current);
 940         }
 941         putname(filename);
 942         return error;
 943 }
 944
 945 asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
 946                             struct pt_regs *regs)
 947 {
 948         void __user *parent_tid = (void __user *)regs->rdx;
 949         void __user *child_tid = (void __user *)regs->rdi;
 950         if (!newsp)
 951                 newsp = regs->rsp;
 952         return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
 953 }
 954
 955 /*
 956  * Some system calls that need sign extended arguments. This could be done by a generic wrapper.
 957  */
 958
 959 long sys32_lseek (unsigned int fd, int offset, unsigned int whence)
 960 {
 961         return sys_lseek(fd, offset, whence);
 962 }
 963
 964 long sys32_kill(int pid, int sig)
 965 {
 966         return sys_kill(pid, sig);
 967 }
 968
 969 long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
 970                         __u32 len_low, __u32 len_high, int advice)
 971 {
 972         return sys_fadvise64_64(fd,
 973                                (((u64)offset_high)<<32) | offset_low,
 974                                (((u64)len_high)<<32) | len_low,
 975                                advice);
 976 }
 977
 978 long sys32_vm86_warning(void)
 979 {
 980         struct task_struct *me = current;
 981         static char lastcomm[sizeof(me->comm)];
 982         if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
 983                 printk(KERN_INFO "%s: vm86 mode not supported on 64 bit kernel\n",
 984                        me->comm);
 985                 strncpy(lastcomm, me->comm, sizeof(lastcomm));
 986         }
 987         return -ENOSYS;
 988 }
 989
 990 long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
 991                           char __user * buf, size_t len)
 992 {
 993         return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len);
 994 }
 995
 996 static int __init ia32_init (void)
 997 {
 998         printk("IA32 emulation $Id: sys_ia32.c,v 1.32 2002/03/24 13:02:28 ak Exp $\n");
 999         return 0;
1000 }
1001
1002 __initcall(ia32_init);
1003
1004 extern unsigned long ia32_sys_call_table[];
1005 EXPORT_SYMBOL(ia32_sys_call_table);