arch/powerpc/kernel/sys_ppc32.c

   1 /*
   2  * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
   3  *
   4  * Copyright (C) 2001 IBM
   5  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   6  * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
   7  *
   8  * These routines maintain argument size conversion between 32bit and 64bit
   9  * environment.
  10  *
  11  *      This program is free software; you can redistribute it and/or
  12  *      modify it under the terms of the GNU General Public License
  13  *      as published by the Free Software Foundation; either version
  14  *      2 of the License, or (at your option) any later version.
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/sched.h>
  19 #include <linux/fs.h>
  20 #include <linux/mm.h>
  21 #include <linux/file.h>
  22 #include <linux/signal.h>
  23 #include <linux/resource.h>
  24 #include <linux/times.h>
  25 #include <linux/smp.h>
  26 #include <linux/sem.h>
  27 #include <linux/msg.h>
  28 #include <linux/shm.h>
  29 #include <linux/poll.h>
  30 #include <linux/personality.h>
  31 #include <linux/stat.h>
  32 #include <linux/mman.h>
  33 #include <linux/in.h>
  34 #include <linux/syscalls.h>
  35 #include <linux/unistd.h>
  36 #include <linux/sysctl.h>
  37 #include <linux/binfmts.h>
  38 #include <linux/security.h>
  39 #include <linux/compat.h>
  40 #include <linux/ptrace.h>
  41 #include <linux/elf.h>
  42 #include <linux/ipc.h>
  43 #include <linux/slab.h>
  44
  45 #include <asm/ptrace.h>
  46 #include <asm/types.h>
  47 #include <asm/uaccess.h>
  48 #include <asm/unistd.h>
  49 #include <asm/time.h>
  50 #include <asm/mmu_context.h>
  51 #include <asm/ppc-pci.h>
  52 #include <asm/syscalls.h>
  53 #include <asm/switch_to.h>
  54
  55
  56 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
  57                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
  58                 compat_uptr_t tvp_x)
  59 {
  60         /* sign extend n */
  61         return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
  62 }
  63
  64 /* Note: it is necessary to treat option as an unsigned int,
  65  * with the corresponding cast to a signed int to insure that the
  66  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
  67  * and the register representation of a signed int (msr in 64-bit mode) is performed.
  68  */
  69 asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
  70 {
  71         return sys_sysfs((int)option, arg1, arg2);
  72 }
  73
  74 #ifdef CONFIG_SYSVIPC
  75 long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
  76                u32 fifth)
  77 {
  78         int version;
  79
  80         version = call >> 16; /* hack for backward compatibility */
  81         call &= 0xffff;
  82
  83         switch (call) {
  84
  85         case SEMTIMEDOP:
  86                 if (fifth)
  87                         /* sign extend semid */
  88                         return compat_sys_semtimedop((int)first,
  89                                                      compat_ptr(ptr), second,
  90                                                      compat_ptr(fifth));
  91                 /* else fall through for normal semop() */
  92         case SEMOP:
  93                 /* struct sembuf is the same on 32 and 64bit :)) */
  94                 /* sign extend semid */
  95                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
  96                                       NULL);
  97         case SEMGET:
  98                 /* sign extend key, nsems */
  99                 return sys_semget((int)first, (int)second, third);
 100         case SEMCTL:
 101                 /* sign extend semid, semnum */
 102                 return compat_sys_semctl((int)first, (int)second, third,
 103                                          compat_ptr(ptr));
 104
 105         case MSGSND:
 106                 /* sign extend msqid */
 107                 return compat_sys_msgsnd((int)first, (int)second, third,
 108                                          compat_ptr(ptr));
 109         case MSGRCV:
 110                 /* sign extend msqid, msgtyp */
 111                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 112                                          third, version, compat_ptr(ptr));
 113         case MSGGET:
 114                 /* sign extend key */
 115                 return sys_msgget((int)first, second);
 116         case MSGCTL:
 117                 /* sign extend msqid */
 118                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 119
 120         case SHMAT:
 121                 /* sign extend shmid */
 122                 return compat_sys_shmat((int)first, second, third, version,
 123                                         compat_ptr(ptr));
 124         case SHMDT:
 125                 return sys_shmdt(compat_ptr(ptr));
 126         case SHMGET:
 127                 /* sign extend key_t */
 128                 return sys_shmget((int)first, second, third);
 129         case SHMCTL:
 130                 /* sign extend shmid */
 131                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 132
 133         default:
 134                 return -ENOSYS;
 135         }
 136
 137         return -ENOSYS;
 138 }
 139 #endif
 140
 141 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
 142  * with the corresponding cast to a signed int to insure that the
 143  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 144  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 145  */
 146 asmlinkage long compat_sys_sendfile_wrapper(u32 out_fd, u32 in_fd,
 147                                             compat_off_t __user *offset, u32 count)
 148 {
 149         return compat_sys_sendfile((int)out_fd, (int)in_fd, offset, count);
 150 }
 151
 152 asmlinkage long compat_sys_sendfile64_wrapper(u32 out_fd, u32 in_fd,
 153                                               compat_loff_t __user *offset, u32 count)
 154 {
 155         return sys_sendfile((int)out_fd, (int)in_fd,
 156                             (off_t __user *)offset, count);
 157 }
 158
 159 long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
 160                   unsigned long a3, unsigned long a4, unsigned long a5,
 161                   struct pt_regs *regs)
 162 {
 163         int error;
 164         char * filename;
 165
 166         filename = getname((char __user *) a0);
 167         error = PTR_ERR(filename);
 168         if (IS_ERR(filename))
 169                 goto out;
 170         flush_fp_to_thread(current);
 171         flush_altivec_to_thread(current);
 172
 173         error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
 174
 175         putname(filename);
 176
 177 out:
 178         return error;
 179 }
 180
 181 /* Note: it is necessary to treat option as an unsigned int,
 182  * with the corresponding cast to a signed int to insure that the
 183  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 184  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 185  */
 186 asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
 187 {
 188         return sys_prctl((int)option,
 189                          (unsigned long) arg2,
 190                          (unsigned long) arg3,
 191                          (unsigned long) arg4,
 192                          (unsigned long) arg5);
 193 }
 194
 195 /* Note: it is necessary to treat pid as an unsigned int,
 196  * with the corresponding cast to a signed int to insure that the
 197  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 198  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 199  */
 200 asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
 201 {
 202         struct timespec t;
 203         int ret;
 204         mm_segment_t old_fs = get_fs ();
 205
 206         /* The __user pointer cast is valid because of the set_fs() */
 207         set_fs (KERNEL_DS);
 208         ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
 209         set_fs (old_fs);
 210         if (put_compat_timespec(&t, interval))
 211                 return -EFAULT;
 212         return ret;
 213 }
 214
 215 /* Note: it is necessary to treat mode as an unsigned int,
 216  * with the corresponding cast to a signed int to insure that the
 217  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 218  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 219  */
 220 asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
 221 {
 222         return sys_access(filename, (int)mode);
 223 }
 224
 225
 226 /* Note: it is necessary to treat mode as an unsigned int,
 227  * with the corresponding cast to a signed int to insure that the
 228  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 229  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 230  */
 231 asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
 232 {
 233         return sys_creat(pathname, (int)mode);
 234 }
 235
 236
 237 /* Note: it is necessary to treat pid and options as unsigned ints,
 238  * with the corresponding cast to a signed int to insure that the
 239  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 240  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 241  */
 242 asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
 243 {
 244         return sys_waitpid((int)pid, stat_addr, (int)options);
 245 }
 246
 247
 248 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 249  * with the corresponding cast to a signed int to insure that the
 250  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 251  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 252  */
 253 asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
 254 {
 255         return sys_getgroups((int)gidsetsize, grouplist);
 256 }
 257
 258
 259 /* Note: it is necessary to treat pid as an unsigned int,
 260  * with the corresponding cast to a signed int to insure that the
 261  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 262  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 263  */
 264 asmlinkage long compat_sys_getpgid(u32 pid)
 265 {
 266         return sys_getpgid((int)pid);
 267 }
 268
 269
 270
 271 /* Note: it is necessary to treat pid as an unsigned int,
 272  * with the corresponding cast to a signed int to insure that the
 273  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 274  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 275  */
 276 asmlinkage long compat_sys_getsid(u32 pid)
 277 {
 278         return sys_getsid((int)pid);
 279 }
 280
 281
 282 /* Note: it is necessary to treat pid and sig as unsigned ints,
 283  * with the corresponding cast to a signed int to insure that the
 284  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 285  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 286  */
 287 asmlinkage long compat_sys_kill(u32 pid, u32 sig)
 288 {
 289         return sys_kill((int)pid, (int)sig);
 290 }
 291
 292
 293 /* Note: it is necessary to treat mode as an unsigned int,
 294  * with the corresponding cast to a signed int to insure that the
 295  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 296  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 297  */
 298 asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)
 299 {
 300         return sys_mkdir(pathname, (int)mode);
 301 }
 302
 303 long compat_sys_nice(u32 increment)
 304 {
 305         /* sign extend increment */
 306         return sys_nice((int)increment);
 307 }
 308
 309 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
 310 {
 311         /* sign extend n */
 312         return sys_lseek(fd, (int)offset, origin);
 313 }
 314
 315 long compat_sys_truncate(const char __user * path, u32 length)
 316 {
 317         /* sign extend length */
 318         return sys_truncate(path, (int)length);
 319 }
 320
 321 long compat_sys_ftruncate(int fd, u32 length)
 322 {
 323         /* sign extend length */
 324         return sys_ftruncate(fd, (int)length);
 325 }
 326
 327 /* Note: it is necessary to treat bufsiz as an unsigned int,
 328  * with the corresponding cast to a signed int to insure that the
 329  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 330  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 331  */
 332 asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)
 333 {
 334         return sys_readlink(path, buf, (int)bufsiz);
 335 }
 336
 337 /* Note: it is necessary to treat option as an unsigned int,
 338  * with the corresponding cast to a signed int to insure that the
 339  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 340  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 341  */
 342 asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
 343 {
 344         return sys_sched_get_priority_max((int)policy);
 345 }
 346
 347
 348 /* Note: it is necessary to treat policy as an unsigned int,
 349  * with the corresponding cast to a signed int to insure that the
 350  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 351  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 352  */
 353 asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
 354 {
 355         return sys_sched_get_priority_min((int)policy);
 356 }
 357
 358
 359 /* Note: it is necessary to treat pid as an unsigned int,
 360  * with the corresponding cast to a signed int to insure that the
 361  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 362  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 363  */
 364 asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
 365 {
 366         return sys_sched_getparam((int)pid, param);
 367 }
 368
 369
 370 /* Note: it is necessary to treat pid as an unsigned int,
 371  * with the corresponding cast to a signed int to insure that the
 372  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 373  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 374  */
 375 asmlinkage long compat_sys_sched_getscheduler(u32 pid)
 376 {
 377         return sys_sched_getscheduler((int)pid);
 378 }
 379
 380
 381 /* Note: it is necessary to treat pid as an unsigned int,
 382  * with the corresponding cast to a signed int to insure that the
 383  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 384  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 385  */
 386 asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
 387 {
 388         return sys_sched_setparam((int)pid, param);
 389 }
 390
 391
 392 /* Note: it is necessary to treat pid and policy as unsigned ints,
 393  * with the corresponding cast to a signed int to insure that the
 394  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 395  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 396  */
 397 asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
 398 {
 399         return sys_sched_setscheduler((int)pid, (int)policy, param);
 400 }
 401
 402
 403 /* Note: it is necessary to treat len as an unsigned int,
 404  * with the corresponding cast to a signed int to insure that the
 405  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 406  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 407  */
 408 asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
 409 {
 410         return sys_setdomainname(name, (int)len);
 411 }
 412
 413
 414 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 415  * with the corresponding cast to a signed int to insure that the
 416  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 417  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 418  */
 419 asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
 420 {
 421         return sys_setgroups((int)gidsetsize, grouplist);
 422 }
 423
 424
 425 asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
 426 {
 427         /* sign extend len */
 428         return sys_sethostname(name, (int)len);
 429 }
 430
 431
 432 /* Note: it is necessary to treat pid and pgid as unsigned ints,
 433  * with the corresponding cast to a signed int to insure that the
 434  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 435  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 436  */
 437 asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
 438 {
 439         return sys_setpgid((int)pid, (int)pgid);
 440 }
 441
 442 long compat_sys_getpriority(u32 which, u32 who)
 443 {
 444         /* sign extend which and who */
 445         return sys_getpriority((int)which, (int)who);
 446 }
 447
 448 long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
 449 {
 450         /* sign extend which, who and niceval */
 451         return sys_setpriority((int)which, (int)who, (int)niceval);
 452 }
 453
 454 long compat_sys_ioprio_get(u32 which, u32 who)
 455 {
 456         /* sign extend which and who */
 457         return sys_ioprio_get((int)which, (int)who);
 458 }
 459
 460 long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
 461 {
 462         /* sign extend which, who and ioprio */
 463         return sys_ioprio_set((int)which, (int)who, (int)ioprio);
 464 }
 465
 466 /* Note: it is necessary to treat newmask as an unsigned int,
 467  * with the corresponding cast to a signed int to insure that the
 468  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 469  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 470  */
 471 asmlinkage long compat_sys_ssetmask(u32 newmask)
 472 {
 473         return sys_ssetmask((int) newmask);
 474 }
 475
 476 asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
 477 {
 478         /* sign extend len */
 479         return sys_syslog(type, buf, (int)len);
 480 }
 481
 482
 483 /* Note: it is necessary to treat mask as an unsigned int,
 484  * with the corresponding cast to a signed int to insure that the
 485  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 486  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 487  */
 488 asmlinkage long compat_sys_umask(u32 mask)
 489 {
 490         return sys_umask((int)mask);
 491 }
 492
 493 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
 494                           unsigned long prot, unsigned long flags,
 495                           unsigned long fd, unsigned long pgoff)
 496 {
 497         /* This should remain 12 even if PAGE_SIZE changes */
 498         return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
 499 }
 500
 501 long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
 502 {
 503         /* sign extend tgid, pid */
 504         return sys_tgkill((int)tgid, (int)pid, sig);
 505 }
 506
 507 /*
 508  * long long munging:
 509  * The 32 bit ABI passes long longs in an odd even register pair.
 510  */
 511
 512 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
 513                              u32 reg6, u32 poshi, u32 poslo)
 514 {
 515         return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 516 }
 517
 518 compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count,
 519                               u32 reg6, u32 poshi, u32 poslo)
 520 {
 521         return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 522 }
 523
 524 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
 525 {
 526         return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
 527 }
 528
 529 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
 530                                 unsigned long high, unsigned long low)
 531 {
 532         return sys_truncate(path, (high << 32) | low);
 533 }
 534
 535 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
 536                                      u32 lenhi, u32 lenlo)
 537 {
 538         return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
 539                              ((loff_t)lenhi << 32) | lenlo);
 540 }
 541
 542 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
 543                                  unsigned long low)
 544 {
 545         return sys_ftruncate(fd, (high << 32) | low);
 546 }
 547
 548 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
 549                           size_t len)
 550 {
 551         return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
 552                                   buf, len);
 553 }
 554
 555 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
 556                      size_t len, int advice)
 557 {
 558         return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
 559                              advice);
 560 }
 561
 562 asmlinkage long compat_sys_add_key(const char __user *_type,
 563                               const char __user *_description,
 564                               const void __user *_payload,
 565                               u32 plen,
 566                               u32 ringid)
 567 {
 568         return sys_add_key(_type, _description, _payload, plen, ringid);
 569 }
 570
 571 asmlinkage long compat_sys_request_key(const char __user *_type,
 572                                   const char __user *_description,
 573                                   const char __user *_callout_info,
 574                                   u32 destringid)
 575 {
 576         return sys_request_key(_type, _description, _callout_info, destringid);
 577 }
 578
 579 asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
 580                                    unsigned offset_hi, unsigned offset_lo,
 581                                    unsigned nbytes_hi, unsigned nbytes_lo)
 582 {
 583         loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;
 584         loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;
 585
 586         return sys_sync_file_range(fd, offset, nbytes, flags);
 587 }
 588
 589 asmlinkage long compat_sys_fanotify_mark(int fanotify_fd, unsigned int flags,
 590                                          unsigned mask_hi, unsigned mask_lo,
 591                                          int dfd, const char __user *pathname)
 592 {
 593         u64 mask = ((u64)mask_hi << 32) | mask_lo;
 594         return sys_fanotify_mark(fanotify_fd, flags, mask, dfd, pathname);
 595 }