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TOMOYO Linux Cross Reference
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  */
 58 SYSCALL_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  */
 69 SYSCALL_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 
 95 struct osf_dirent {
 96         unsigned int d_ino;
 97         unsigned short d_reclen;
 98         unsigned short d_namlen;
 99         char d_name[1];
100 };
101 
102 struct 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 
110 static int
111 osf_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;
144 Efault:
145         buf->error = -EFAULT;
146         return -EFAULT;
147 }
148 
149 SYSCALL_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 
177 SYSCALL_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 
197 struct 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  */
235 struct 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 
248 struct 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 
276 static int
277 linux_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 
302 static int
303 linux_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 
323 static int
324 linux_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 
343 SYSCALL_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 
353 SYSCALL_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 
365 SYSCALL_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 
377 SYSCALL_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 
389 SYSCALL_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 
399 SYSCALL_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 
409 SYSCALL_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  */
424 struct ufs_args {
425         char __user *devname;
426         int flags;
427         uid_t exroot;
428 };
429 
430 struct 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 
439 struct 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  */
453 static int
454 osf_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 
474 static int
475 osf_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 
495 static int
496 osf_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 
507 SYSCALL_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 
530 SYSCALL_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 
547 SYSCALL_DEFINE0(getpagesize)
548 {
549         return PAGE_SIZE;
550 }
551 
552 SYSCALL_DEFINE0(getdtablesize)
553 {
554         return sysctl_nr_open;
555 }
556 
557 /*
558  * For compatibility with OSF/1 only.  Use utsname(2) instead.
559  */
560 SYSCALL_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 
596 struct proplistname_args {
597         unsigned int pl_mask;
598         unsigned int pl_numnames;
599         char **pl_names;
600 };
601 
602 union 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 
640 enum 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 
646 SYSCALL_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 
684 SYSCALL_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 
724 SYSCALL_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 
761 SYSCALL_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 
818 SYSCALL_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 softare 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 softare 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 
932 extern struct timezone sys_tz;
933 
934 struct timeval32
935 {
936     int tv_sec, tv_usec;
937 };
938 
939 struct itimerval32
940 {
941     struct timeval32 it_interval;
942     struct timeval32 it_value;
943 };
944 
945 static inline long
946 get_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 
956 static inline long
957 put_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 
965 static inline long
966 put_tv_to_tv32(struct timeval32 __user *o, struct 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 
974 static inline long
975 get_it32(struct itimerval *o, struct itimerval32 __user *i)
976 {
977         struct itimerval32 itv;
978         if (copy_from_user(&itv, i, sizeof(struct itimerval32)))
979                 return -EFAULT;
980         o->it_interval.tv_sec = itv.it_interval.tv_sec;
981         o->it_interval.tv_usec = itv.it_interval.tv_usec;
982         o->it_value.tv_sec = itv.it_value.tv_sec;
983         o->it_value.tv_usec = itv.it_value.tv_usec;
984         return 0;
985 }
986 
987 static inline long
988 put_it32(struct itimerval32 __user *o, struct itimerval *i)
989 {
990         return copy_to_user(o, &(struct itimerval32){
991                                 .it_interval.tv_sec = o->it_interval.tv_sec,
992                                 .it_interval.tv_usec = o->it_interval.tv_usec,
993                                 .it_value.tv_sec = o->it_value.tv_sec,
994                                 .it_value.tv_usec = o->it_value.tv_usec},
995                             sizeof(struct itimerval32));
996 }
997 
998 static inline void
999 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
1000 {
1001         value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
1002         value->tv_sec = jiffies / HZ;
1003 }
1004 
1005 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
1006                 struct timezone __user *, tz)
1007 {
1008         if (tv) {
1009                 struct timespec64 kts;
1010 
1011                 ktime_get_real_ts64(&kts);
1012                 if (put_tv32(tv, &kts))
1013                         return -EFAULT;
1014         }
1015         if (tz) {
1016                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
1017                         return -EFAULT;
1018         }
1019         return 0;
1020 }
1021 
1022 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
1023                 struct timezone __user *, tz)
1024 {
1025         struct timespec64 kts;
1026         struct timezone ktz;
1027 
1028         if (tv) {
1029                 if (get_tv32(&kts, tv))
1030                         return -EFAULT;
1031         }
1032         if (tz) {
1033                 if (copy_from_user(&ktz, tz, sizeof(*tz)))
1034                         return -EFAULT;
1035         }
1036 
1037         return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL);
1038 }
1039 
1040 asmlinkage long sys_ni_posix_timers(void);
1041 
1042 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
1043 {
1044         struct itimerval kit;
1045         int error;
1046 
1047         if (!IS_ENABLED(CONFIG_POSIX_TIMERS))
1048                 return sys_ni_posix_timers();
1049 
1050         error = do_getitimer(which, &kit);
1051         if (!error && put_it32(it, &kit))
1052                 error = -EFAULT;
1053 
1054         return error;
1055 }
1056 
1057 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
1058                 struct itimerval32 __user *, out)
1059 {
1060         struct itimerval kin, kout;
1061         int error;
1062 
1063         if (!IS_ENABLED(CONFIG_POSIX_TIMERS))
1064                 return sys_ni_posix_timers();
1065 
1066         if (in) {
1067                 if (get_it32(&kin, in))
1068                         return -EFAULT;
1069         } else
1070                 memset(&kin, 0, sizeof(kin));
1071 
1072         error = do_setitimer(which, &kin, out ? &kout : NULL);
1073         if (error || !out)
1074                 return error;
1075 
1076         if (put_it32(out, &kout))
1077                 return -EFAULT;
1078 
1079         return 0;
1080 
1081 }
1082 
1083 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1084                 struct timeval32 __user *, tvs)
1085 {
1086         struct timespec64 tv[2];
1087 
1088         if (tvs) {
1089                 if (get_tv32(&tv[0], &tvs[0]) ||
1090                     get_tv32(&tv[1], &tvs[1]))
1091                         return -EFAULT;
1092 
1093                 if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 ||
1094                     tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000)
1095                         return -EINVAL;
1096         }
1097 
1098         return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1099 }
1100 
1101 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1102                 fd_set __user *, exp, struct timeval32 __user *, tvp)
1103 {
1104         struct timespec64 end_time, *to = NULL;
1105         if (tvp) {
1106                 struct timespec64 tv;
1107                 to = &end_time;
1108 
1109                 if (get_tv32(&tv, tvp))
1110                         return -EFAULT;
1111 
1112                 if (tv.tv_sec < 0 || tv.tv_nsec < 0)
1113                         return -EINVAL;
1114 
1115                 if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec))
1116                         return -EINVAL;         
1117 
1118         }
1119 
1120         /* OSF does not copy back the remaining time.  */
1121         return core_sys_select(n, inp, outp, exp, to);
1122 }
1123 
1124 struct rusage32 {
1125         struct timeval32 ru_utime;      /* user time used */
1126         struct timeval32 ru_stime;      /* system time used */
1127         long    ru_maxrss;              /* maximum resident set size */
1128         long    ru_ixrss;               /* integral shared memory size */
1129         long    ru_idrss;               /* integral unshared data size */
1130         long    ru_isrss;               /* integral unshared stack size */
1131         long    ru_minflt;              /* page reclaims */
1132         long    ru_majflt;              /* page faults */
1133         long    ru_nswap;               /* swaps */
1134         long    ru_inblock;             /* block input operations */
1135         long    ru_oublock;             /* block output operations */
1136         long    ru_msgsnd;              /* messages sent */
1137         long    ru_msgrcv;              /* messages received */
1138         long    ru_nsignals;            /* signals received */
1139         long    ru_nvcsw;               /* voluntary context switches */
1140         long    ru_nivcsw;              /* involuntary " */
1141 };
1142 
1143 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1144 {
1145         struct rusage32 r;
1146         u64 utime, stime;
1147         unsigned long utime_jiffies, stime_jiffies;
1148 
1149         if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1150                 return -EINVAL;
1151 
1152         memset(&r, 0, sizeof(r));
1153         switch (who) {
1154         case RUSAGE_SELF:
1155                 task_cputime(current, &utime, &stime);
1156                 utime_jiffies = nsecs_to_jiffies(utime);
1157                 stime_jiffies = nsecs_to_jiffies(stime);
1158                 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1159                 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1160                 r.ru_minflt = current->min_flt;
1161                 r.ru_majflt = current->maj_flt;
1162                 break;
1163         case RUSAGE_CHILDREN:
1164                 utime_jiffies = nsecs_to_jiffies(current->signal->cutime);
1165                 stime_jiffies = nsecs_to_jiffies(current->signal->cstime);
1166                 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1167                 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1168                 r.ru_minflt = current->signal->cmin_flt;
1169                 r.ru_majflt = current->signal->cmaj_flt;
1170                 break;
1171         }
1172 
1173         return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1174 }
1175 
1176 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1177                 struct rusage32 __user *, ur)
1178 {
1179         struct rusage r;
1180         long err = kernel_wait4(pid, ustatus, options, &r);
1181         if (err <= 0)
1182                 return err;
1183         if (!ur)
1184                 return err;
1185         if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime))
1186                 return -EFAULT;
1187         if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime))
1188                 return -EFAULT;
1189         if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss,
1190               sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss)))
1191                 return -EFAULT;
1192         return err;
1193 }
1194 
1195 /*
1196  * I don't know what the parameters are: the first one
1197  * seems to be a timeval pointer, and I suspect the second
1198  * one is the time remaining.. Ho humm.. No documentation.
1199  */
1200 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1201                 struct timeval32 __user *, remain)
1202 {
1203         struct timespec64 tmp;
1204         unsigned long ticks;
1205 
1206         if (get_tv32(&tmp, sleep))
1207                 goto fault;
1208 
1209         ticks = timespec64_to_jiffies(&tmp);
1210 
1211         ticks = schedule_timeout_interruptible(ticks);
1212 
1213         if (remain) {
1214                 jiffies_to_timespec64(ticks, &tmp);
1215                 if (put_tv32(remain, &tmp))
1216                         goto fault;
1217         }
1218         
1219         return 0;
1220  fault:
1221         return -EFAULT;
1222 }
1223 
1224 
1225 struct timex32 {
1226         unsigned int modes;     /* mode selector */
1227         long offset;            /* time offset (usec) */
1228         long freq;              /* frequency offset (scaled ppm) */
1229         long maxerror;          /* maximum error (usec) */
1230         long esterror;          /* estimated error (usec) */
1231         int status;             /* clock command/status */
1232         long constant;          /* pll time constant */
1233         long precision;         /* clock precision (usec) (read only) */
1234         long tolerance;         /* clock frequency tolerance (ppm)
1235                                  * (read only)
1236                                  */
1237         struct timeval32 time;  /* (read only) */
1238         long tick;              /* (modified) usecs between clock ticks */
1239 
1240         long ppsfreq;           /* pps frequency (scaled ppm) (ro) */
1241         long jitter;            /* pps jitter (us) (ro) */
1242         int shift;              /* interval duration (s) (shift) (ro) */
1243         long stabil;            /* pps stability (scaled ppm) (ro) */
1244         long jitcnt;            /* jitter limit exceeded (ro) */
1245         long calcnt;            /* calibration intervals (ro) */
1246         long errcnt;            /* calibration errors (ro) */
1247         long stbcnt;            /* stability limit exceeded (ro) */
1248 
1249         int  :32; int  :32; int  :32; int  :32;
1250         int  :32; int  :32; int  :32; int  :32;
1251         int  :32; int  :32; int  :32; int  :32;
1252 };
1253 
1254 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1255 {
1256         struct __kernel_timex txc;
1257         int ret;
1258 
1259         /* copy relevant bits of struct timex. */
1260         if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1261             copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - 
1262                            offsetof(struct timex32, tick)))
1263           return -EFAULT;
1264 
1265         ret = do_adjtimex(&txc);        
1266         if (ret < 0)
1267           return ret;
1268         
1269         /* copy back to timex32 */
1270         if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1271             (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - 
1272                           offsetof(struct timex32, tick))) ||
1273             (put_user(txc.time.tv_sec, &txc_p->time.tv_sec)) ||
1274             (put_user(txc.time.tv_usec, &txc_p->time.tv_usec)))
1275           return -EFAULT;
1276 
1277         return ret;
1278 }
1279 
1280 /* Get an address range which is currently unmapped.  Similar to the
1281    generic version except that we know how to honor ADDR_LIMIT_32BIT.  */
1282 
1283 static unsigned long
1284 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1285                          unsigned long limit)
1286 {
1287         struct vm_unmapped_area_info info;
1288 
1289         info.flags = 0;
1290         info.length = len;
1291         info.low_limit = addr;
1292         info.high_limit = limit;
1293         info.align_mask = 0;
1294         info.align_offset = 0;
1295         return vm_unmapped_area(&info);
1296 }
1297 
1298 unsigned long
1299 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1300                        unsigned long len, unsigned long pgoff,
1301                        unsigned long flags)
1302 {
1303         unsigned long limit;
1304 
1305         /* "32 bit" actually means 31 bit, since pointers sign extend.  */
1306         if (current->personality & ADDR_LIMIT_32BIT)
1307                 limit = 0x80000000;
1308         else
1309                 limit = TASK_SIZE;
1310 
1311         if (len > limit)
1312                 return -ENOMEM;
1313 
1314         if (flags & MAP_FIXED)
1315                 return addr;
1316 
1317         /* First, see if the given suggestion fits.
1318 
1319            The OSF/1 loader (/sbin/loader) relies on us returning an
1320            address larger than the requested if one exists, which is
1321            a terribly broken way to program.
1322 
1323            That said, I can see the use in being able to suggest not
1324            merely specific addresses, but regions of memory -- perhaps
1325            this feature should be incorporated into all ports?  */
1326 
1327         if (addr) {
1328                 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1329                 if (addr != (unsigned long) -ENOMEM)
1330                         return addr;
1331         }
1332 
1333         /* Next, try allocating at TASK_UNMAPPED_BASE.  */
1334         addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1335                                          len, limit);
1336         if (addr != (unsigned long) -ENOMEM)
1337                 return addr;
1338 
1339         /* Finally, try allocating in low memory.  */
1340         addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1341 
1342         return addr;
1343 }
1344 
1345 #ifdef CONFIG_OSF4_COMPAT
1346 /* Clear top 32 bits of iov_len in the user's buffer for
1347    compatibility with old versions of OSF/1 where iov_len
1348    was defined as int. */
1349 static int
1350 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1351 {
1352         unsigned long i;
1353 
1354         for (i = 0 ; i < count ; i++) {
1355                 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1356 
1357                 if (put_user(0, iov_len_high))
1358                         return -EFAULT;
1359         }
1360         return 0;
1361 }
1362 #endif
1363 
1364 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1365                 const struct iovec __user *, vector, unsigned long, count)
1366 {
1367 #ifdef CONFIG_OSF4_COMPAT
1368         if (unlikely(personality(current->personality) == PER_OSF4))
1369                 if (osf_fix_iov_len(vector, count))
1370                         return -EFAULT;
1371 #endif
1372 
1373         return sys_readv(fd, vector, count);
1374 }
1375 
1376 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1377                 const struct iovec __user *, vector, unsigned long, count)
1378 {
1379 #ifdef CONFIG_OSF4_COMPAT
1380         if (unlikely(personality(current->personality) == PER_OSF4))
1381                 if (osf_fix_iov_len(vector, count))
1382                         return -EFAULT;
1383 #endif
1384         return sys_writev(fd, vector, count);
1385 }
1386 
1387 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1388 {
1389         int prio = sys_getpriority(which, who);
1390         if (prio >= 0) {
1391                 /* Return value is the unbiased priority, i.e. 20 - prio.
1392                    This does result in negative return values, so signal
1393                    no error */
1394                 force_successful_syscall_return();
1395                 prio = 20 - prio;
1396         }
1397         return prio;
1398 }
1399 
1400 SYSCALL_DEFINE0(getxuid)
1401 {
1402         current_pt_regs()->r20 = sys_geteuid();
1403         return sys_getuid();
1404 }
1405 
1406 SYSCALL_DEFINE0(getxgid)
1407 {
1408         current_pt_regs()->r20 = sys_getegid();
1409         return sys_getgid();
1410 }
1411 
1412 SYSCALL_DEFINE0(getxpid)
1413 {
1414         current_pt_regs()->r20 = sys_getppid();
1415         return sys_getpid();
1416 }
1417 
1418 SYSCALL_DEFINE0(alpha_pipe)
1419 {
1420         int fd[2];
1421         int res = do_pipe_flags(fd, 0);
1422         if (!res) {
1423                 /* The return values are in $0 and $20.  */
1424                 current_pt_regs()->r20 = fd[1];
1425                 res = fd[0];
1426         }
1427         return res;
1428 }
1429 
1430 SYSCALL_DEFINE1(sethae, unsigned long, val)
1431 {
1432         current_pt_regs()->hae = val;
1433         return 0;
1434 }
1435 

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