linux/arch/alpha/kernel/osf_sys.c
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   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 *  linux/arch/alpha/kernel/osf_sys.c
   4 *
   5 *  Copyright (C) 1995  Linus Torvalds
   6 */
   7
   8/*
   9 * This file handles some of the stranger OSF/1 system call interfaces.
  10 * Some of the system calls expect a non-C calling standard, others have
  11 * special parameter blocks..
  12 */
  13
  14#include <linux/errno.h>
  15#include <linux/sched/signal.h>
  16#include <linux/sched/mm.h>
  17#include <linux/sched/task_stack.h>
  18#include <linux/sched/cputime.h>
  19#include <linux/kernel.h>
  20#include <linux/mm.h>
  21#include <linux/smp.h>
  22#include <linux/stddef.h>
  23#include <linux/syscalls.h>
  24#include <linux/unistd.h>
  25#include <linux/ptrace.h>
  26#include <linux/user.h>
  27#include <linux/utsname.h>
  28#include <linux/time.h>
  29#include <linux/timex.h>
  30#include <linux/major.h>
  31#include <linux/stat.h>
  32#include <linux/mman.h>
  33#include <linux/shm.h>
  34#include <linux/poll.h>
  35#include <linux/file.h>
  36#include <linux/types.h>
  37#include <linux/ipc.h>
  38#include <linux/namei.h>
  39#include <linux/uio.h>
  40#include <linux/vfs.h>
  41#include <linux/rcupdate.h>
  42#include <linux/slab.h>
  43
  44#include <asm/fpu.h>
  45#include <asm/io.h>
  46#include <linux/uaccess.h>
  47#include <asm/sysinfo.h>
  48#include <asm/thread_info.h>
  49#include <asm/hwrpb.h>
  50#include <asm/processor.h>
  51
  52/*
  53 * Brk needs to return an error.  Still support Linux's brk(0) query idiom,
  54 * which OSF programs just shouldn't be doing.  We're still not quite
  55 * identical to OSF as we don't return 0 on success, but doing otherwise
  56 * would require changes to libc.  Hopefully this is good enough.
  57 */
  58SYSCALL_DEFINE1(osf_brk, unsigned long, brk)
  59{
  60        unsigned long retval = sys_brk(brk);
  61        if (brk && brk != retval)
  62                retval = -ENOMEM;
  63        return retval;
  64}
  65 
  66/*
  67 * This is pure guess-work..
  68 */
  69SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start,
  70                unsigned long, text_len, unsigned long, bss_start,
  71                unsigned long, bss_len)
  72{
  73        struct mm_struct *mm;
  74
  75        mm = current->mm;
  76        mm->end_code = bss_start + bss_len;
  77        mm->start_brk = bss_start + bss_len;
  78        mm->brk = bss_start + bss_len;
  79#if 0
  80        printk("set_program_attributes(%lx %lx %lx %lx)\n",
  81                text_start, text_len, bss_start, bss_len);
  82#endif
  83        return 0;
  84}
  85
  86/*
  87 * OSF/1 directory handling functions...
  88 *
  89 * The "getdents()" interface is much more sane: the "basep" stuff is
  90 * braindamage (it can't really handle filesystems where the directory
  91 * offset differences aren't the same as "d_reclen").
  92 */
  93#define NAME_OFFSET     offsetof (struct osf_dirent, d_name)
  94
  95struct osf_dirent {
  96        unsigned int d_ino;
  97        unsigned short d_reclen;
  98        unsigned short d_namlen;
  99        char d_name[1];
 100};
 101
 102struct osf_dirent_callback {
 103        struct dir_context ctx;
 104        struct osf_dirent __user *dirent;
 105        long __user *basep;
 106        unsigned int count;
 107        int error;
 108};
 109
 110static int
 111osf_filldir(struct dir_context *ctx, const char *name, int namlen,
 112            loff_t offset, u64 ino, unsigned int d_type)
 113{
 114        struct osf_dirent __user *dirent;
 115        struct osf_dirent_callback *buf =
 116                container_of(ctx, struct osf_dirent_callback, ctx);
 117        unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
 118        unsigned int d_ino;
 119
 120        buf->error = -EINVAL;   /* only used if we fail */
 121        if (reclen > buf->count)
 122                return -EINVAL;
 123        d_ino = ino;
 124        if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
 125                buf->error = -EOVERFLOW;
 126                return -EOVERFLOW;
 127        }
 128        if (buf->basep) {
 129                if (put_user(offset, buf->basep))
 130                        goto Efault;
 131                buf->basep = NULL;
 132        }
 133        dirent = buf->dirent;
 134        if (put_user(d_ino, &dirent->d_ino) ||
 135            put_user(namlen, &dirent->d_namlen) ||
 136            put_user(reclen, &dirent->d_reclen) ||
 137            copy_to_user(dirent->d_name, name, namlen) ||
 138            put_user(0, dirent->d_name + namlen))
 139                goto Efault;
 140        dirent = (void __user *)dirent + reclen;
 141        buf->dirent = dirent;
 142        buf->count -= reclen;
 143        return 0;
 144Efault:
 145        buf->error = -EFAULT;
 146        return -EFAULT;
 147}
 148
 149SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
 150                struct osf_dirent __user *, dirent, unsigned int, count,
 151                long __user *, basep)
 152{
 153        int error;
 154        struct fd arg = fdget_pos(fd);
 155        struct osf_dirent_callback buf = {
 156                .ctx.actor = osf_filldir,
 157                .dirent = dirent,
 158                .basep = basep,
 159                .count = count
 160        };
 161
 162        if (!arg.file)
 163                return -EBADF;
 164
 165        error = iterate_dir(arg.file, &buf.ctx);
 166        if (error >= 0)
 167                error = buf.error;
 168        if (count != buf.count)
 169                error = count - buf.count;
 170
 171        fdput_pos(arg);
 172        return error;
 173}
 174
 175#undef NAME_OFFSET
 176
 177SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
 178                unsigned long, prot, unsigned long, flags, unsigned long, fd,
 179                unsigned long, off)
 180{
 181        unsigned long ret = -EINVAL;
 182
 183#if 0
 184        if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
 185                printk("%s: unimplemented OSF mmap flags %04lx\n", 
 186                        current->comm, flags);
 187#endif
 188        if ((off + PAGE_ALIGN(len)) < off)
 189                goto out;
 190        if (off & ~PAGE_MASK)
 191                goto out;
 192        ret = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
 193 out:
 194        return ret;
 195}
 196
 197struct osf_stat {
 198        int             st_dev;
 199        int             st_pad1;
 200        unsigned        st_mode;
 201        unsigned short  st_nlink;
 202        short           st_nlink_reserved;
 203        unsigned        st_uid;
 204        unsigned        st_gid;
 205        int             st_rdev;
 206        int             st_ldev;
 207        long            st_size;
 208        int             st_pad2;
 209        int             st_uatime;
 210        int             st_pad3;
 211        int             st_umtime;
 212        int             st_pad4;
 213        int             st_uctime;
 214        int             st_pad5;
 215        int             st_pad6;
 216        unsigned        st_flags;
 217        unsigned        st_gen;
 218        long            st_spare[4];
 219        unsigned        st_ino;
 220        int             st_ino_reserved;
 221        int             st_atime;
 222        int             st_atime_reserved;
 223        int             st_mtime;
 224        int             st_mtime_reserved;
 225        int             st_ctime;
 226        int             st_ctime_reserved;
 227        long            st_blksize;
 228        long            st_blocks;
 229};
 230
 231/*
 232 * The OSF/1 statfs structure is much larger, but this should
 233 * match the beginning, at least.
 234 */
 235struct osf_statfs {
 236        short f_type;
 237        short f_flags;
 238        int f_fsize;
 239        int f_bsize;
 240        int f_blocks;
 241        int f_bfree;
 242        int f_bavail;
 243        int f_files;
 244        int f_ffree;
 245        __kernel_fsid_t f_fsid;
 246};
 247
 248struct osf_statfs64 {
 249        short f_type;
 250        short f_flags;
 251        int f_pad1;
 252        int f_pad2;
 253        int f_pad3;
 254        int f_pad4;
 255        int f_pad5;
 256        int f_pad6;
 257        int f_pad7;
 258        __kernel_fsid_t f_fsid;
 259        u_short f_namemax;
 260        short f_reserved1;
 261        int f_spare[8];
 262        char f_pad8[90];
 263        char f_pad9[90];
 264        long mount_info[10];
 265        u_long f_flags2;
 266        long f_spare2[14];
 267        long f_fsize;
 268        long f_bsize;
 269        long f_blocks;
 270        long f_bfree;
 271        long f_bavail;
 272        long f_files;
 273        long f_ffree;
 274};
 275
 276static int
 277linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat)
 278{
 279        struct osf_stat tmp = { 0 };
 280
 281        tmp.st_dev      = lstat->dev;
 282        tmp.st_mode     = lstat->mode;
 283        tmp.st_nlink    = lstat->nlink;
 284        tmp.st_uid      = from_kuid_munged(current_user_ns(), lstat->uid);
 285        tmp.st_gid      = from_kgid_munged(current_user_ns(), lstat->gid);
 286        tmp.st_rdev     = lstat->rdev;
 287        tmp.st_ldev     = lstat->rdev;
 288        tmp.st_size     = lstat->size;
 289        tmp.st_uatime   = lstat->atime.tv_nsec / 1000;
 290        tmp.st_umtime   = lstat->mtime.tv_nsec / 1000;
 291        tmp.st_uctime   = lstat->ctime.tv_nsec / 1000;
 292        tmp.st_ino      = lstat->ino;
 293        tmp.st_atime    = lstat->atime.tv_sec;
 294        tmp.st_mtime    = lstat->mtime.tv_sec;
 295        tmp.st_ctime    = lstat->ctime.tv_sec;
 296        tmp.st_blksize  = lstat->blksize;
 297        tmp.st_blocks   = lstat->blocks;
 298
 299        return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0;
 300}
 301
 302static int
 303linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
 304                    unsigned long bufsiz)
 305{
 306        struct osf_statfs tmp_stat;
 307
 308        tmp_stat.f_type = linux_stat->f_type;
 309        tmp_stat.f_flags = 0;   /* mount flags */
 310        tmp_stat.f_fsize = linux_stat->f_frsize;
 311        tmp_stat.f_bsize = linux_stat->f_bsize;
 312        tmp_stat.f_blocks = linux_stat->f_blocks;
 313        tmp_stat.f_bfree = linux_stat->f_bfree;
 314        tmp_stat.f_bavail = linux_stat->f_bavail;
 315        tmp_stat.f_files = linux_stat->f_files;
 316        tmp_stat.f_ffree = linux_stat->f_ffree;
 317        tmp_stat.f_fsid = linux_stat->f_fsid;
 318        if (bufsiz > sizeof(tmp_stat))
 319                bufsiz = sizeof(tmp_stat);
 320        return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
 321}
 322
 323static int
 324linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat,
 325                      unsigned long bufsiz)
 326{
 327        struct osf_statfs64 tmp_stat = { 0 };
 328
 329        tmp_stat.f_type = linux_stat->f_type;
 330        tmp_stat.f_fsize = linux_stat->f_frsize;
 331        tmp_stat.f_bsize = linux_stat->f_bsize;
 332        tmp_stat.f_blocks = linux_stat->f_blocks;
 333        tmp_stat.f_bfree = linux_stat->f_bfree;
 334        tmp_stat.f_bavail = linux_stat->f_bavail;
 335        tmp_stat.f_files = linux_stat->f_files;
 336        tmp_stat.f_ffree = linux_stat->f_ffree;
 337        tmp_stat.f_fsid = linux_stat->f_fsid;
 338        if (bufsiz > sizeof(tmp_stat))
 339                bufsiz = sizeof(tmp_stat);
 340        return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
 341}
 342
 343SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
 344                struct osf_statfs __user *, buffer, unsigned long, bufsiz)
 345{
 346        struct kstatfs linux_stat;
 347        int error = user_statfs(pathname, &linux_stat);
 348        if (!error)
 349                error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
 350        return error;   
 351}
 352
 353SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
 354{
 355        struct kstat stat;
 356        int error;
 357
 358        error = vfs_stat(name, &stat);
 359        if (error)
 360                return error;
 361
 362        return linux_to_osf_stat(&stat, buf);
 363}
 364
 365SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf)
 366{
 367        struct kstat stat;
 368        int error;
 369
 370        error = vfs_lstat(name, &stat);
 371        if (error)
 372                return error;
 373
 374        return linux_to_osf_stat(&stat, buf);
 375}
 376
 377SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf)
 378{
 379        struct kstat stat;
 380        int error;
 381
 382        error = vfs_fstat(fd, &stat);
 383        if (error)
 384                return error;
 385
 386        return linux_to_osf_stat(&stat, buf);
 387}
 388
 389SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
 390                struct osf_statfs __user *, buffer, unsigned long, bufsiz)
 391{
 392        struct kstatfs linux_stat;
 393        int error = fd_statfs(fd, &linux_stat);
 394        if (!error)
 395                error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
 396        return error;
 397}
 398
 399SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname,
 400                struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
 401{
 402        struct kstatfs linux_stat;
 403        int error = user_statfs(pathname, &linux_stat);
 404        if (!error)
 405                error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
 406        return error;
 407}
 408
 409SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd,
 410                struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
 411{
 412        struct kstatfs linux_stat;
 413        int error = fd_statfs(fd, &linux_stat);
 414        if (!error)
 415                error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
 416        return error;
 417}
 418
 419/*
 420 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
 421 *
 422 * Although to be frank, neither are the native Linux/i386 ones..
 423 */
 424struct ufs_args {
 425        char __user *devname;
 426        int flags;
 427        uid_t exroot;
 428};
 429
 430struct cdfs_args {
 431        char __user *devname;
 432        int flags;
 433        uid_t exroot;
 434
 435        /* This has lots more here, which Linux handles with the option block
 436           but I'm too lazy to do the translation into ASCII.  */
 437};
 438
 439struct procfs_args {
 440        char __user *devname;
 441        int flags;
 442        uid_t exroot;
 443};
 444
 445/*
 446 * We can't actually handle ufs yet, so we translate UFS mounts to
 447 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
 448 * layout is so braindead it's a major headache doing it.
 449 *
 450 * Just how long ago was it written? OTOH our UFS driver may be still
 451 * unhappy with OSF UFS. [CHECKME]
 452 */
 453static int
 454osf_ufs_mount(const char __user *dirname,
 455              struct ufs_args __user *args, int flags)
 456{
 457        int retval;
 458        struct cdfs_args tmp;
 459        struct filename *devname;
 460
 461        retval = -EFAULT;
 462        if (copy_from_user(&tmp, args, sizeof(tmp)))
 463                goto out;
 464        devname = getname(tmp.devname);
 465        retval = PTR_ERR(devname);
 466        if (IS_ERR(devname))
 467                goto out;
 468        retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
 469        putname(devname);
 470 out:
 471        return retval;
 472}
 473
 474static int
 475osf_cdfs_mount(const char __user *dirname,
 476               struct cdfs_args __user *args, int flags)
 477{
 478        int retval;
 479        struct cdfs_args tmp;
 480        struct filename *devname;
 481
 482        retval = -EFAULT;
 483        if (copy_from_user(&tmp, args, sizeof(tmp)))
 484                goto out;
 485        devname = getname(tmp.devname);
 486        retval = PTR_ERR(devname);
 487        if (IS_ERR(devname))
 488                goto out;
 489        retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
 490        putname(devname);
 491 out:
 492        return retval;
 493}
 494
 495static int
 496osf_procfs_mount(const char __user *dirname,
 497                 struct procfs_args __user *args, int flags)
 498{
 499        struct procfs_args tmp;
 500
 501        if (copy_from_user(&tmp, args, sizeof(tmp)))
 502                return -EFAULT;
 503
 504        return do_mount("", dirname, "proc", flags, NULL);
 505}
 506
 507SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
 508                int, flag, void __user *, data)
 509{
 510        int retval;
 511
 512        switch (typenr) {
 513        case 1:
 514                retval = osf_ufs_mount(path, data, flag);
 515                break;
 516        case 6:
 517                retval = osf_cdfs_mount(path, data, flag);
 518                break;
 519        case 9:
 520                retval = osf_procfs_mount(path, data, flag);
 521                break;
 522        default:
 523                retval = -EINVAL;
 524                printk("osf_mount(%ld, %x)\n", typenr, flag);
 525        }
 526
 527        return retval;
 528}
 529
 530SYSCALL_DEFINE1(osf_utsname, char __user *, name)
 531{
 532        char tmp[5 * 32];
 533
 534        down_read(&uts_sem);
 535        memcpy(tmp + 0 * 32, utsname()->sysname, 32);
 536        memcpy(tmp + 1 * 32, utsname()->nodename, 32);
 537        memcpy(tmp + 2 * 32, utsname()->release, 32);
 538        memcpy(tmp + 3 * 32, utsname()->version, 32);
 539        memcpy(tmp + 4 * 32, utsname()->machine, 32);
 540        up_read(&uts_sem);
 541
 542        if (copy_to_user(name, tmp, sizeof(tmp)))
 543                return -EFAULT;
 544        return 0;
 545}
 546
 547SYSCALL_DEFINE0(getpagesize)
 548{
 549        return PAGE_SIZE;
 550}
 551
 552SYSCALL_DEFINE0(getdtablesize)
 553{
 554        return sysctl_nr_open;
 555}
 556
 557/*
 558 * For compatibility with OSF/1 only.  Use utsname(2) instead.
 559 */
 560SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
 561{
 562        int len;
 563        char *kname;
 564        char tmp[32];
 565
 566        if (namelen < 0 || namelen > 32)
 567                namelen = 32;
 568
 569        down_read(&uts_sem);
 570        kname = utsname()->domainname;
 571        len = strnlen(kname, namelen);
 572        len = min(len + 1, namelen);
 573        memcpy(tmp, kname, len);
 574        up_read(&uts_sem);
 575
 576        if (copy_to_user(name, tmp, len))
 577                return -EFAULT;
 578        return 0;
 579}
 580
 581/*
 582 * The following stuff should move into a header file should it ever
 583 * be labeled "officially supported."  Right now, there is just enough
 584 * support to avoid applications (such as tar) printing error
 585 * messages.  The attributes are not really implemented.
 586 */
 587
 588/*
 589 * Values for Property list entry flag
 590 */
 591#define PLE_PROPAGATE_ON_COPY           0x1     /* cp(1) will copy entry
 592                                                   by default */
 593#define PLE_FLAG_MASK                   0x1     /* Valid flag values */
 594#define PLE_FLAG_ALL                    -1      /* All flag value */
 595
 596struct proplistname_args {
 597        unsigned int pl_mask;
 598        unsigned int pl_numnames;
 599        char **pl_names;
 600};
 601
 602union pl_args {
 603        struct setargs {
 604                char __user *path;
 605                long follow;
 606                long nbytes;
 607                char __user *buf;
 608        } set;
 609        struct fsetargs {
 610                long fd;
 611                long nbytes;
 612                char __user *buf;
 613        } fset;
 614        struct getargs {
 615                char __user *path;
 616                long follow;
 617                struct proplistname_args __user *name_args;
 618                long nbytes;
 619                char __user *buf;
 620                int __user *min_buf_size;
 621        } get;
 622        struct fgetargs {
 623                long fd;
 624                struct proplistname_args __user *name_args;
 625                long nbytes;
 626                char __user *buf;
 627                int __user *min_buf_size;
 628        } fget;
 629        struct delargs {
 630                char __user *path;
 631                long follow;
 632                struct proplistname_args __user *name_args;
 633        } del;
 634        struct fdelargs {
 635                long fd;
 636                struct proplistname_args __user *name_args;
 637        } fdel;
 638};
 639
 640enum pl_code {
 641        PL_SET = 1, PL_FSET = 2,
 642        PL_GET = 3, PL_FGET = 4,
 643        PL_DEL = 5, PL_FDEL = 6
 644};
 645
 646SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
 647                union pl_args __user *, args)
 648{
 649        long error;
 650        int __user *min_buf_size_ptr;
 651
 652        switch (code) {
 653        case PL_SET:
 654                if (get_user(error, &args->set.nbytes))
 655                        error = -EFAULT;
 656                break;
 657        case PL_FSET:
 658                if (get_user(error, &args->fset.nbytes))
 659                        error = -EFAULT;
 660                break;
 661        case PL_GET:
 662                error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
 663                if (error)
 664                        break;
 665                error = put_user(0, min_buf_size_ptr);
 666                break;
 667        case PL_FGET:
 668                error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
 669                if (error)
 670                        break;
 671                error = put_user(0, min_buf_size_ptr);
 672                break;
 673        case PL_DEL:
 674        case PL_FDEL:
 675                error = 0;
 676                break;
 677        default:
 678                error = -EOPNOTSUPP;
 679                break;
 680        }
 681        return error;
 682}
 683
 684SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
 685                struct sigstack __user *, uoss)
 686{
 687        unsigned long usp = rdusp();
 688        unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
 689        unsigned long oss_os = on_sig_stack(usp);
 690        int error;
 691
 692        if (uss) {
 693                void __user *ss_sp;
 694
 695                error = -EFAULT;
 696                if (get_user(ss_sp, &uss->ss_sp))
 697                        goto out;
 698
 699                /* If the current stack was set with sigaltstack, don't
 700                   swap stacks while we are on it.  */
 701                error = -EPERM;
 702                if (current->sas_ss_sp && on_sig_stack(usp))
 703                        goto out;
 704
 705                /* Since we don't know the extent of the stack, and we don't
 706                   track onstack-ness, but rather calculate it, we must 
 707                   presume a size.  Ho hum this interface is lossy.  */
 708                current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
 709                current->sas_ss_size = SIGSTKSZ;
 710        }
 711
 712        if (uoss) {
 713                error = -EFAULT;
 714                if (put_user(oss_sp, &uoss->ss_sp) ||
 715                    put_user(oss_os, &uoss->ss_onstack))
 716                        goto out;
 717        }
 718
 719        error = 0;
 720 out:
 721        return error;
 722}
 723
 724SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
 725{
 726        const char *sysinfo_table[] = {
 727                utsname()->sysname,
 728                utsname()->nodename,
 729                utsname()->release,
 730                utsname()->version,
 731                utsname()->machine,
 732                "alpha",        /* instruction set architecture */
 733                "dummy",        /* hardware serial number */
 734                "dummy",        /* hardware manufacturer */
 735                "dummy",        /* secure RPC domain */
 736        };
 737        unsigned long offset;
 738        const char *res;
 739        long len;
 740        char tmp[__NEW_UTS_LEN + 1];
 741
 742        offset = command-1;
 743        if (offset >= ARRAY_SIZE(sysinfo_table)) {
 744                /* Digital UNIX has a few unpublished interfaces here */
 745                printk("sysinfo(%d)", command);
 746                return -EINVAL;
 747        }
 748
 749        down_read(&uts_sem);
 750        res = sysinfo_table[offset];
 751        len = strlen(res)+1;
 752        if ((unsigned long)len > (unsigned long)count)
 753                len = count;
 754        memcpy(tmp, res, len);
 755        up_read(&uts_sem);
 756        if (copy_to_user(buf, tmp, len))
 757                return -EFAULT;
 758        return 0;
 759}
 760
 761SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
 762                unsigned long, nbytes, int __user *, start, void __user *, arg)
 763{
 764        unsigned long w;
 765        struct percpu_struct *cpu;
 766
 767        switch (op) {
 768        case GSI_IEEE_FP_CONTROL:
 769                /* Return current software fp control & status bits.  */
 770                /* Note that DU doesn't verify available space here.  */
 771
 772                w = current_thread_info()->ieee_state & IEEE_SW_MASK;
 773                w = swcr_update_status(w, rdfpcr());
 774                if (put_user(w, (unsigned long __user *) buffer))
 775                        return -EFAULT;
 776                return 0;
 777
 778        case GSI_IEEE_STATE_AT_SIGNAL:
 779                /*
 780                 * Not sure anybody will ever use this weird stuff.  These
 781                 * ops can be used (under OSF/1) to set the fpcr that should
 782                 * be used when a signal handler starts executing.
 783                 */
 784                break;
 785
 786        case GSI_UACPROC:
 787                if (nbytes < sizeof(unsigned int))
 788                        return -EINVAL;
 789                w = current_thread_info()->status & UAC_BITMASK;
 790                if (put_user(w, (unsigned int __user *)buffer))
 791                        return -EFAULT;
 792                return 1;
 793
 794        case GSI_PROC_TYPE:
 795                if (nbytes < sizeof(unsigned long))
 796                        return -EINVAL;
 797                cpu = (struct percpu_struct*)
 798                  ((char*)hwrpb + hwrpb->processor_offset);
 799                w = cpu->type;
 800                if (put_user(w, (unsigned long  __user*)buffer))
 801                        return -EFAULT;
 802                return 1;
 803
 804        case GSI_GET_HWRPB:
 805                if (nbytes > sizeof(*hwrpb))
 806                        return -EINVAL;
 807                if (copy_to_user(buffer, hwrpb, nbytes) != 0)
 808                        return -EFAULT;
 809                return 1;
 810
 811        default:
 812                break;
 813        }
 814
 815        return -EOPNOTSUPP;
 816}
 817
 818SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
 819                unsigned long, nbytes, int __user *, start, void __user *, arg)
 820{
 821        switch (op) {
 822        case SSI_IEEE_FP_CONTROL: {
 823                unsigned long swcr, fpcr;
 824                unsigned int *state;
 825
 826                /* 
 827                 * Alpha Architecture Handbook 4.7.7.3:
 828                 * To be fully IEEE compiant, we must track the current IEEE
 829                 * exception state in software, because spurious bits can be
 830                 * set in the trap shadow of a software-complete insn.
 831                 */
 832
 833                if (get_user(swcr, (unsigned long __user *)buffer))
 834                        return -EFAULT;
 835                state = &current_thread_info()->ieee_state;
 836
 837                /* Update software trap enable bits.  */
 838                *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
 839
 840                /* Update the real fpcr.  */
 841                fpcr = rdfpcr() & FPCR_DYN_MASK;
 842                fpcr |= ieee_swcr_to_fpcr(swcr);
 843                wrfpcr(fpcr);
 844
 845                return 0;
 846        }
 847
 848        case SSI_IEEE_RAISE_EXCEPTION: {
 849                unsigned long exc, swcr, fpcr, fex;
 850                unsigned int *state;
 851
 852                if (get_user(exc, (unsigned long __user *)buffer))
 853                        return -EFAULT;
 854                state = &current_thread_info()->ieee_state;
 855                exc &= IEEE_STATUS_MASK;
 856
 857                /* Update software trap enable bits.  */
 858                swcr = (*state & IEEE_SW_MASK) | exc;
 859                *state |= exc;
 860
 861                /* Update the real fpcr.  */
 862                fpcr = rdfpcr();
 863                fpcr |= ieee_swcr_to_fpcr(swcr);
 864                wrfpcr(fpcr);
 865
 866                /* If any exceptions set by this call, and are unmasked,
 867                   send a signal.  Old exceptions are not signaled.  */
 868                fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
 869                if (fex) {
 870                        int si_code = FPE_FLTUNK;
 871
 872                        if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
 873                        if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
 874                        if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
 875                        if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
 876                        if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
 877                        if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
 878
 879                        send_sig_fault(SIGFPE, si_code,
 880                                       (void __user *)NULL,  /* FIXME */
 881                                       0, current);
 882                }
 883                return 0;
 884        }
 885
 886        case SSI_IEEE_STATE_AT_SIGNAL:
 887        case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
 888                /*
 889                 * Not sure anybody will ever use this weird stuff.  These
 890                 * ops can be used (under OSF/1) to set the fpcr that should
 891                 * be used when a signal handler starts executing.
 892                 */
 893                break;
 894
 895        case SSI_NVPAIRS: {
 896                unsigned __user *p = buffer;
 897                unsigned i;
 898                
 899                for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
 900                        unsigned v, w, status;
 901
 902                        if (get_user(v, p) || get_user(w, p + 1))
 903                                return -EFAULT;
 904                        switch (v) {
 905                        case SSIN_UACPROC:
 906                                w &= UAC_BITMASK;
 907                                status = current_thread_info()->status;
 908                                status = (status & ~UAC_BITMASK) | w;
 909                                current_thread_info()->status = status;
 910                                break;
 911 
 912                        default:
 913                                return -EOPNOTSUPP;
 914                        }
 915                }
 916                return 0;
 917        }
 918 
 919        case SSI_LMF:
 920                return 0;
 921
 922        default:
 923                break;
 924        }
 925
 926        return -EOPNOTSUPP;
 927}
 928
 929/* Translations due to the fact that OSF's time_t is an int.  Which
 930   affects all sorts of things, like timeval and itimerval.  */
 931
 932extern struct timezone sys_tz;
 933
 934struct timeval32
 935{
 936    int tv_sec, tv_usec;
 937};
 938
 939struct itimerval32
 940{
 941    struct timeval32 it_interval;
 942    struct timeval32 it_value;
 943};
 944
 945static inline long
 946get_tv32(struct timespec64 *o, struct timeval32 __user *i)
 947{
 948        struct timeval32 tv;
 949        if (copy_from_user(&tv, i, sizeof(struct timeval32)))
 950                return -EFAULT;
 951        o->tv_sec = tv.tv_sec;
 952        o->tv_nsec = tv.tv_usec * NSEC_PER_USEC;
 953        return 0;
 954}
 955
 956static inline long
 957put_tv32(struct timeval32 __user *o, struct timespec64 *i)
 958{
 959        return copy_to_user(o, &(struct timeval32){
 960                                .tv_sec = i->tv_sec,
 961                                .tv_usec = i->tv_nsec / NSEC_PER_USEC},
 962                            sizeof(struct timeval32));
 963}
 964
 965static inline long
 966put_tv_to_tv32(struct timeval32 __user *o, struct __kernel_old_timeval *i)
 967{
 968        return copy_to_user(o, &(struct timeval32){
 969                                .tv_sec = i->tv_sec,
 970                                .tv_usec = i->tv_usec},
 971                            sizeof(struct timeval32));
 972}
 973
 974static inline void
 975jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
 976{
 977        value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
 978        value->tv_sec = jiffies / HZ;
 979}
 980
 981SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
 982                struct timezone __user *, tz)
 983{
 984        if (tv) {
 985                struct timespec64 kts;
 986
 987                ktime_get_real_ts64(&kts);
 988                if (put_tv32(tv, &kts))
 989                        return -EFAULT;
 990        }
 991        if (tz) {
 992                if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 993                        return -EFAULT;
 994        }
 995        return 0;
 996}
 997
 998SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
 999                struct timezone __user *, tz)
1000{
1001        struct timespec64 kts;
1002        struct timezone ktz;
1003
1004        if (tv) {
1005                if (get_tv32(&kts, tv))
1006                        return -EFAULT;
1007        }
1008        if (tz) {
1009                if (copy_from_user(&ktz, tz, sizeof(*tz)))
1010                        return -EFAULT;
1011        }
1012
1013        return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL);
1014}
1015
1016asmlinkage long sys_ni_posix_timers(void);
1017
1018SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1019                struct timeval32 __user *, tvs)
1020{
1021        struct timespec64 tv[2];
1022
1023        if (tvs) {
1024                if (get_tv32(&tv[0], &tvs[0]) ||
1025                    get_tv32(&tv[1], &tvs[1]))
1026                        return -EFAULT;
1027
1028                if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 ||
1029                    tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000)
1030                        return -EINVAL;
1031        }
1032
1033        return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1034}
1035
1036SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1037                fd_set __user *, exp, struct timeval32 __user *, tvp)
1038{
1039        struct timespec64 end_time, *to = NULL;
1040        if (tvp) {
1041                struct timespec64 tv;
1042                to = &end_time;
1043
1044                if (get_tv32(&tv, tvp))
1045                        return -EFAULT;
1046
1047                if (tv.tv_sec < 0 || tv.tv_nsec < 0)
1048                        return -EINVAL;
1049
1050                if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec))
1051                        return -EINVAL;         
1052
1053        }
1054
1055        /* OSF does not copy back the remaining time.  */
1056        return core_sys_select(n, inp, outp, exp, to);
1057}
1058
1059struct rusage32 {
1060        struct timeval32 ru_utime;      /* user time used */
1061        struct timeval32 ru_stime;      /* system time used */
1062        long    ru_maxrss;              /* maximum resident set size */
1063        long    ru_ixrss;               /* integral shared memory size */
1064        long    ru_idrss;               /* integral unshared data size */
1065        long    ru_isrss;               /* integral unshared stack size */
1066        long    ru_minflt;              /* page reclaims */
1067        long    ru_majflt;              /* page faults */
1068        long    ru_nswap;               /* swaps */
1069        long    ru_inblock;             /* block input operations */
1070        long    ru_oublock;             /* block output operations */
1071        long    ru_msgsnd;              /* messages sent */
1072        long    ru_msgrcv;              /* messages received */
1073        long    ru_nsignals;            /* signals received */
1074        long    ru_nvcsw;               /* voluntary context switches */
1075        long    ru_nivcsw;              /* involuntary " */
1076};
1077
1078SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1079{
1080        struct rusage32 r;
1081        u64 utime, stime;
1082        unsigned long utime_jiffies, stime_jiffies;
1083
1084        if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1085                return -EINVAL;
1086
1087        memset(&r, 0, sizeof(r));
1088        switch (who) {
1089        case RUSAGE_SELF:
1090                task_cputime(current, &utime, &stime);
1091                utime_jiffies = nsecs_to_jiffies(utime);
1092                stime_jiffies = nsecs_to_jiffies(stime);
1093                jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1094                jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1095                r.ru_minflt = current->min_flt;
1096                r.ru_majflt = current->maj_flt;
1097                break;
1098        case RUSAGE_CHILDREN:
1099                utime_jiffies = nsecs_to_jiffies(current->signal->cutime);
1100                stime_jiffies = nsecs_to_jiffies(current->signal->cstime);
1101                jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1102                jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1103                r.ru_minflt = current->signal->cmin_flt;
1104                r.ru_majflt = current->signal->cmaj_flt;
1105                break;
1106        }
1107
1108        return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1109}
1110
1111SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1112                struct rusage32 __user *, ur)
1113{
1114        struct rusage r;
1115        long err = kernel_wait4(pid, ustatus, options, &r);
1116        if (err <= 0)
1117                return err;
1118        if (!ur)
1119                return err;
1120        if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime))
1121                return -EFAULT;
1122        if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime))
1123                return -EFAULT;
1124        if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss,
1125              sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss)))
1126                return -EFAULT;
1127        return err;
1128}
1129
1130/*
1131 * I don't know what the parameters are: the first one
1132 * seems to be a timeval pointer, and I suspect the second
1133 * one is the time remaining.. Ho humm.. No documentation.
1134 */
1135SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1136                struct timeval32 __user *, remain)
1137{
1138        struct timespec64 tmp;
1139        unsigned long ticks;
1140
1141        if (get_tv32(&tmp, sleep))
1142                goto fault;
1143
1144        ticks = timespec64_to_jiffies(&tmp);
1145
1146        ticks = schedule_timeout_interruptible(ticks);
1147
1148        if (remain) {
1149                jiffies_to_timespec64(ticks, &tmp);
1150                if (put_tv32(remain, &tmp))
1151                        goto fault;
1152        }
1153        
1154        return 0;
1155 fault:
1156        return -EFAULT;
1157}
1158
1159
1160struct timex32 {
1161        unsigned int modes;     /* mode selector */
1162        long offset;            /* time offset (usec) */
1163        long freq;              /* frequency offset (scaled ppm) */
1164        long maxerror;          /* maximum error (usec) */
1165        long esterror;          /* estimated error (usec) */
1166        int status;             /* clock command/status */
1167        long constant;          /* pll time constant */
1168        long precision;         /* clock precision (usec) (read only) */
1169        long tolerance;         /* clock frequency tolerance (ppm)
1170                                 * (read only)
1171                                 */
1172        struct timeval32 time;  /* (read only) */
1173        long tick;              /* (modified) usecs between clock ticks */
1174
1175        long ppsfreq;           /* pps frequency (scaled ppm) (ro) */
1176        long jitter;            /* pps jitter (us) (ro) */
1177        int shift;              /* interval duration (s) (shift) (ro) */
1178        long stabil;            /* pps stability (scaled ppm) (ro) */
1179        long jitcnt;            /* jitter limit exceeded (ro) */
1180        long calcnt;            /* calibration intervals (ro) */
1181        long errcnt;            /* calibration errors (ro) */
1182        long stbcnt;            /* stability limit exceeded (ro) */
1183
1184        int  :32; int  :32; int  :32; int  :32;
1185        int  :32; int  :32; int  :32; int  :32;
1186        int  :32; int  :32; int  :32; int  :32;
1187};
1188
1189SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1190{
1191        struct __kernel_timex txc;
1192        int ret;
1193
1194        /* copy relevant bits of struct timex. */
1195        if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1196            copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 
1197                           offsetof(struct timex32, tick)))
1198          return -EFAULT;
1199
1200        ret = do_adjtimex(&txc);        
1201        if (ret < 0)
1202          return ret;
1203        
1204        /* copy back to timex32 */
1205        if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1206            (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 
1207                          offsetof(struct timex32, tick))) ||
1208            (put_user(txc.time.tv_sec, &txc_p->time.tv_sec)) ||
1209            (put_user(txc.time.tv_usec, &txc_p->time.tv_usec)))
1210          return -EFAULT;
1211
1212        return ret;
1213}
1214
1215/* Get an address range which is currently unmapped.  Similar to the
1216   generic version except that we know how to honor ADDR_LIMIT_32BIT.  */
1217
1218static unsigned long
1219arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1220                         unsigned long limit)
1221{
1222        struct vm_unmapped_area_info info;
1223
1224        info.flags = 0;
1225        info.length = len;
1226        info.low_limit = addr;
1227        info.high_limit = limit;
1228        info.align_mask = 0;
1229        info.align_offset = 0;
1230        return vm_unmapped_area(&info);
1231}
1232
1233unsigned long
1234arch_get_unmapped_area(struct file *filp, unsigned long addr,
1235                       unsigned long len, unsigned long pgoff,
1236                       unsigned long flags)
1237{
1238        unsigned long limit;
1239
1240        /* "32 bit" actually means 31 bit, since pointers sign extend.  */
1241        if (current->personality & ADDR_LIMIT_32BIT)
1242                limit = 0x80000000;
1243        else
1244                limit = TASK_SIZE;
1245
1246        if (len > limit)
1247                return -ENOMEM;
1248
1249        if (flags & MAP_FIXED)
1250                return addr;
1251
1252        /* First, see if the given suggestion fits.
1253
1254           The OSF/1 loader (/sbin/loader) relies on us returning an
1255           address larger than the requested if one exists, which is
1256           a terribly broken way to program.
1257
1258           That said, I can see the use in being able to suggest not
1259           merely specific addresses, but regions of memory -- perhaps
1260           this feature should be incorporated into all ports?  */
1261
1262        if (addr) {
1263                addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1264                if (addr != (unsigned long) -ENOMEM)
1265                        return addr;
1266        }
1267
1268        /* Next, try allocating at TASK_UNMAPPED_BASE.  */
1269        addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1270                                         len, limit);
1271        if (addr != (unsigned long) -ENOMEM)
1272                return addr;
1273
1274        /* Finally, try allocating in low memory.  */
1275        addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1276
1277        return addr;
1278}
1279
1280#ifdef CONFIG_OSF4_COMPAT
1281/* Clear top 32 bits of iov_len in the user's buffer for
1282   compatibility with old versions of OSF/1 where iov_len
1283   was defined as int. */
1284static int
1285osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1286{
1287        unsigned long i;
1288
1289        for (i = 0 ; i < count ; i++) {
1290                int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1291
1292                if (put_user(0, iov_len_high))
1293                        return -EFAULT;
1294        }
1295        return 0;
1296}
1297#endif
1298
1299SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1300                const struct iovec __user *, vector, unsigned long, count)
1301{
1302#ifdef CONFIG_OSF4_COMPAT
1303        if (unlikely(personality(current->personality) == PER_OSF4))
1304                if (osf_fix_iov_len(vector, count))
1305                        return -EFAULT;
1306#endif
1307
1308        return sys_readv(fd, vector, count);
1309}
1310
1311SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1312                const struct iovec __user *, vector, unsigned long, count)
1313{
1314#ifdef CONFIG_OSF4_COMPAT
1315        if (unlikely(personality(current->personality) == PER_OSF4))
1316                if (osf_fix_iov_len(vector, count))
1317                        return -EFAULT;
1318#endif
1319        return sys_writev(fd, vector, count);
1320}
1321
1322SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1323{
1324        int prio = sys_getpriority(which, who);
1325        if (prio >= 0) {
1326                /* Return value is the unbiased priority, i.e. 20 - prio.
1327                   This does result in negative return values, so signal
1328                   no error */
1329                force_successful_syscall_return();
1330                prio = 20 - prio;
1331        }
1332        return prio;
1333}
1334
1335SYSCALL_DEFINE0(getxuid)
1336{
1337        current_pt_regs()->r20 = sys_geteuid();
1338        return sys_getuid();
1339}
1340
1341SYSCALL_DEFINE0(getxgid)
1342{
1343        current_pt_regs()->r20 = sys_getegid();
1344        return sys_getgid();
1345}
1346
1347SYSCALL_DEFINE0(getxpid)
1348{
1349        current_pt_regs()->r20 = sys_getppid();
1350        return sys_getpid();
1351}
1352
1353SYSCALL_DEFINE0(alpha_pipe)
1354{
1355        int fd[2];
1356        int res = do_pipe_flags(fd, 0);
1357        if (!res) {
1358                /* The return values are in $0 and $20.  */
1359                current_pt_regs()->r20 = fd[1];
1360                res = fd[0];
1361        }
1362        return res;
1363}
1364
1365SYSCALL_DEFINE1(sethae, unsigned long, val)
1366{
1367        current_pt_regs()->hae = val;
1368        return 0;
1369}
1370
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