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[mirror_ubuntu-jammy-kernel.git] / arch / alpha / kernel / osf_sys.c
1 /*
2 * linux/arch/alpha/kernel/osf_sys.c
3 *
4 * Copyright (C) 1995 Linus Torvalds
5 */
6
7 /*
8 * This file handles some of the stranger OSF/1 system call interfaces.
9 * Some of the system calls expect a non-C calling standard, others have
10 * special parameter blocks..
11 */
12
13 #include <linux/errno.h>
14 #include <linux/sched.h>
15 #include <linux/kernel.h>
16 #include <linux/mm.h>
17 #include <linux/smp.h>
18 #include <linux/stddef.h>
19 #include <linux/syscalls.h>
20 #include <linux/unistd.h>
21 #include <linux/ptrace.h>
22 #include <linux/user.h>
23 #include <linux/utsname.h>
24 #include <linux/time.h>
25 #include <linux/timex.h>
26 #include <linux/major.h>
27 #include <linux/stat.h>
28 #include <linux/mman.h>
29 #include <linux/shm.h>
30 #include <linux/poll.h>
31 #include <linux/file.h>
32 #include <linux/types.h>
33 #include <linux/ipc.h>
34 #include <linux/namei.h>
35 #include <linux/uio.h>
36 #include <linux/vfs.h>
37 #include <linux/rcupdate.h>
38 #include <linux/slab.h>
39
40 #include <asm/fpu.h>
41 #include <asm/io.h>
42 #include <asm/uaccess.h>
43 #include <asm/sysinfo.h>
44 #include <asm/thread_info.h>
45 #include <asm/hwrpb.h>
46 #include <asm/processor.h>
47
48 /*
49 * Brk needs to return an error. Still support Linux's brk(0) query idiom,
50 * which OSF programs just shouldn't be doing. We're still not quite
51 * identical to OSF as we don't return 0 on success, but doing otherwise
52 * would require changes to libc. Hopefully this is good enough.
53 */
54 SYSCALL_DEFINE1(osf_brk, unsigned long, brk)
55 {
56 unsigned long retval = sys_brk(brk);
57 if (brk && brk != retval)
58 retval = -ENOMEM;
59 return retval;
60 }
61
62 /*
63 * This is pure guess-work..
64 */
65 SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start,
66 unsigned long, text_len, unsigned long, bss_start,
67 unsigned long, bss_len)
68 {
69 struct mm_struct *mm;
70
71 mm = current->mm;
72 mm->end_code = bss_start + bss_len;
73 mm->start_brk = bss_start + bss_len;
74 mm->brk = bss_start + bss_len;
75 #if 0
76 printk("set_program_attributes(%lx %lx %lx %lx)\n",
77 text_start, text_len, bss_start, bss_len);
78 #endif
79 return 0;
80 }
81
82 /*
83 * OSF/1 directory handling functions...
84 *
85 * The "getdents()" interface is much more sane: the "basep" stuff is
86 * braindamage (it can't really handle filesystems where the directory
87 * offset differences aren't the same as "d_reclen").
88 */
89 #define NAME_OFFSET offsetof (struct osf_dirent, d_name)
90
91 struct osf_dirent {
92 unsigned int d_ino;
93 unsigned short d_reclen;
94 unsigned short d_namlen;
95 char d_name[1];
96 };
97
98 struct osf_dirent_callback {
99 struct osf_dirent __user *dirent;
100 long __user *basep;
101 unsigned int count;
102 int error;
103 };
104
105 static int
106 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset,
107 u64 ino, unsigned int d_type)
108 {
109 struct osf_dirent __user *dirent;
110 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf;
111 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
112 unsigned int d_ino;
113
114 buf->error = -EINVAL; /* only used if we fail */
115 if (reclen > buf->count)
116 return -EINVAL;
117 d_ino = ino;
118 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
119 buf->error = -EOVERFLOW;
120 return -EOVERFLOW;
121 }
122 if (buf->basep) {
123 if (put_user(offset, buf->basep))
124 goto Efault;
125 buf->basep = NULL;
126 }
127 dirent = buf->dirent;
128 if (put_user(d_ino, &dirent->d_ino) ||
129 put_user(namlen, &dirent->d_namlen) ||
130 put_user(reclen, &dirent->d_reclen) ||
131 copy_to_user(dirent->d_name, name, namlen) ||
132 put_user(0, dirent->d_name + namlen))
133 goto Efault;
134 dirent = (void __user *)dirent + reclen;
135 buf->dirent = dirent;
136 buf->count -= reclen;
137 return 0;
138 Efault:
139 buf->error = -EFAULT;
140 return -EFAULT;
141 }
142
143 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
144 struct osf_dirent __user *, dirent, unsigned int, count,
145 long __user *, basep)
146 {
147 int error;
148 struct file *file;
149 struct osf_dirent_callback buf;
150
151 error = -EBADF;
152 file = fget(fd);
153 if (!file)
154 goto out;
155
156 buf.dirent = dirent;
157 buf.basep = basep;
158 buf.count = count;
159 buf.error = 0;
160
161 error = vfs_readdir(file, osf_filldir, &buf);
162 if (error >= 0)
163 error = buf.error;
164 if (count != buf.count)
165 error = count - buf.count;
166
167 fput(file);
168 out:
169 return error;
170 }
171
172 #undef NAME_OFFSET
173
174 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
175 unsigned long, prot, unsigned long, flags, unsigned long, fd,
176 unsigned long, off)
177 {
178 unsigned long ret = -EINVAL;
179
180 #if 0
181 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
182 printk("%s: unimplemented OSF mmap flags %04lx\n",
183 current->comm, flags);
184 #endif
185 if ((off + PAGE_ALIGN(len)) < off)
186 goto out;
187 if (off & ~PAGE_MASK)
188 goto out;
189 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
190 out:
191 return ret;
192 }
193
194 struct osf_stat {
195 int st_dev;
196 int st_pad1;
197 unsigned st_mode;
198 unsigned short st_nlink;
199 short st_nlink_reserved;
200 unsigned st_uid;
201 unsigned st_gid;
202 int st_rdev;
203 int st_ldev;
204 long st_size;
205 int st_pad2;
206 int st_uatime;
207 int st_pad3;
208 int st_umtime;
209 int st_pad4;
210 int st_uctime;
211 int st_pad5;
212 int st_pad6;
213 unsigned st_flags;
214 unsigned st_gen;
215 long st_spare[4];
216 unsigned st_ino;
217 int st_ino_reserved;
218 int st_atime;
219 int st_atime_reserved;
220 int st_mtime;
221 int st_mtime_reserved;
222 int st_ctime;
223 int st_ctime_reserved;
224 long st_blksize;
225 long st_blocks;
226 };
227
228 /*
229 * The OSF/1 statfs structure is much larger, but this should
230 * match the beginning, at least.
231 */
232 struct osf_statfs {
233 short f_type;
234 short f_flags;
235 int f_fsize;
236 int f_bsize;
237 int f_blocks;
238 int f_bfree;
239 int f_bavail;
240 int f_files;
241 int f_ffree;
242 __kernel_fsid_t f_fsid;
243 };
244
245 struct osf_statfs64 {
246 short f_type;
247 short f_flags;
248 int f_pad1;
249 int f_pad2;
250 int f_pad3;
251 int f_pad4;
252 int f_pad5;
253 int f_pad6;
254 int f_pad7;
255 __kernel_fsid_t f_fsid;
256 u_short f_namemax;
257 short f_reserved1;
258 int f_spare[8];
259 char f_pad8[90];
260 char f_pad9[90];
261 long mount_info[10];
262 u_long f_flags2;
263 long f_spare2[14];
264 long f_fsize;
265 long f_bsize;
266 long f_blocks;
267 long f_bfree;
268 long f_bavail;
269 long f_files;
270 long f_ffree;
271 };
272
273 static int
274 linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat)
275 {
276 struct osf_stat tmp = { 0 };
277
278 tmp.st_dev = lstat->dev;
279 tmp.st_mode = lstat->mode;
280 tmp.st_nlink = lstat->nlink;
281 tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid);
282 tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid);
283 tmp.st_rdev = lstat->rdev;
284 tmp.st_ldev = lstat->rdev;
285 tmp.st_size = lstat->size;
286 tmp.st_uatime = lstat->atime.tv_nsec / 1000;
287 tmp.st_umtime = lstat->mtime.tv_nsec / 1000;
288 tmp.st_uctime = lstat->ctime.tv_nsec / 1000;
289 tmp.st_ino = lstat->ino;
290 tmp.st_atime = lstat->atime.tv_sec;
291 tmp.st_mtime = lstat->mtime.tv_sec;
292 tmp.st_ctime = lstat->ctime.tv_sec;
293 tmp.st_blksize = lstat->blksize;
294 tmp.st_blocks = lstat->blocks;
295
296 return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0;
297 }
298
299 static int
300 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
301 unsigned long bufsiz)
302 {
303 struct osf_statfs tmp_stat;
304
305 tmp_stat.f_type = linux_stat->f_type;
306 tmp_stat.f_flags = 0; /* mount flags */
307 tmp_stat.f_fsize = linux_stat->f_frsize;
308 tmp_stat.f_bsize = linux_stat->f_bsize;
309 tmp_stat.f_blocks = linux_stat->f_blocks;
310 tmp_stat.f_bfree = linux_stat->f_bfree;
311 tmp_stat.f_bavail = linux_stat->f_bavail;
312 tmp_stat.f_files = linux_stat->f_files;
313 tmp_stat.f_ffree = linux_stat->f_ffree;
314 tmp_stat.f_fsid = linux_stat->f_fsid;
315 if (bufsiz > sizeof(tmp_stat))
316 bufsiz = sizeof(tmp_stat);
317 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
318 }
319
320 static int
321 linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat,
322 unsigned long bufsiz)
323 {
324 struct osf_statfs64 tmp_stat = { 0 };
325
326 tmp_stat.f_type = linux_stat->f_type;
327 tmp_stat.f_fsize = linux_stat->f_frsize;
328 tmp_stat.f_bsize = linux_stat->f_bsize;
329 tmp_stat.f_blocks = linux_stat->f_blocks;
330 tmp_stat.f_bfree = linux_stat->f_bfree;
331 tmp_stat.f_bavail = linux_stat->f_bavail;
332 tmp_stat.f_files = linux_stat->f_files;
333 tmp_stat.f_ffree = linux_stat->f_ffree;
334 tmp_stat.f_fsid = linux_stat->f_fsid;
335 if (bufsiz > sizeof(tmp_stat))
336 bufsiz = sizeof(tmp_stat);
337 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
338 }
339
340 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
341 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
342 {
343 struct kstatfs linux_stat;
344 int error = user_statfs(pathname, &linux_stat);
345 if (!error)
346 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
347 return error;
348 }
349
350 SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
351 {
352 struct kstat stat;
353 int error;
354
355 error = vfs_stat(name, &stat);
356 if (error)
357 return error;
358
359 return linux_to_osf_stat(&stat, buf);
360 }
361
362 SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf)
363 {
364 struct kstat stat;
365 int error;
366
367 error = vfs_lstat(name, &stat);
368 if (error)
369 return error;
370
371 return linux_to_osf_stat(&stat, buf);
372 }
373
374 SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf)
375 {
376 struct kstat stat;
377 int error;
378
379 error = vfs_fstat(fd, &stat);
380 if (error)
381 return error;
382
383 return linux_to_osf_stat(&stat, buf);
384 }
385
386 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
387 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
388 {
389 struct kstatfs linux_stat;
390 int error = fd_statfs(fd, &linux_stat);
391 if (!error)
392 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
393 return error;
394 }
395
396 SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname,
397 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
398 {
399 struct kstatfs linux_stat;
400 int error = user_statfs(pathname, &linux_stat);
401 if (!error)
402 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
403 return error;
404 }
405
406 SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd,
407 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
408 {
409 struct kstatfs linux_stat;
410 int error = fd_statfs(fd, &linux_stat);
411 if (!error)
412 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
413 return error;
414 }
415
416 /*
417 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
418 *
419 * Although to be frank, neither are the native Linux/i386 ones..
420 */
421 struct ufs_args {
422 char __user *devname;
423 int flags;
424 uid_t exroot;
425 };
426
427 struct cdfs_args {
428 char __user *devname;
429 int flags;
430 uid_t exroot;
431
432 /* This has lots more here, which Linux handles with the option block
433 but I'm too lazy to do the translation into ASCII. */
434 };
435
436 struct procfs_args {
437 char __user *devname;
438 int flags;
439 uid_t exroot;
440 };
441
442 /*
443 * We can't actually handle ufs yet, so we translate UFS mounts to
444 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
445 * layout is so braindead it's a major headache doing it.
446 *
447 * Just how long ago was it written? OTOH our UFS driver may be still
448 * unhappy with OSF UFS. [CHECKME]
449 */
450 static int
451 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
452 {
453 int retval;
454 struct cdfs_args tmp;
455 char *devname;
456
457 retval = -EFAULT;
458 if (copy_from_user(&tmp, args, sizeof(tmp)))
459 goto out;
460 devname = getname(tmp.devname);
461 retval = PTR_ERR(devname);
462 if (IS_ERR(devname))
463 goto out;
464 retval = do_mount(devname, dirname, "ext2", flags, NULL);
465 putname(devname);
466 out:
467 return retval;
468 }
469
470 static int
471 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
472 {
473 int retval;
474 struct cdfs_args tmp;
475 char *devname;
476
477 retval = -EFAULT;
478 if (copy_from_user(&tmp, args, sizeof(tmp)))
479 goto out;
480 devname = getname(tmp.devname);
481 retval = PTR_ERR(devname);
482 if (IS_ERR(devname))
483 goto out;
484 retval = do_mount(devname, dirname, "iso9660", flags, NULL);
485 putname(devname);
486 out:
487 return retval;
488 }
489
490 static int
491 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags)
492 {
493 struct procfs_args tmp;
494
495 if (copy_from_user(&tmp, args, sizeof(tmp)))
496 return -EFAULT;
497
498 return do_mount("", dirname, "proc", flags, NULL);
499 }
500
501 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
502 int, flag, void __user *, data)
503 {
504 int retval;
505 char *name;
506
507 name = getname(path);
508 retval = PTR_ERR(name);
509 if (IS_ERR(name))
510 goto out;
511 switch (typenr) {
512 case 1:
513 retval = osf_ufs_mount(name, data, flag);
514 break;
515 case 6:
516 retval = osf_cdfs_mount(name, data, flag);
517 break;
518 case 9:
519 retval = osf_procfs_mount(name, data, flag);
520 break;
521 default:
522 retval = -EINVAL;
523 printk("osf_mount(%ld, %x)\n", typenr, flag);
524 }
525 putname(name);
526 out:
527 return retval;
528 }
529
530 SYSCALL_DEFINE1(osf_utsname, char __user *, name)
531 {
532 int error;
533
534 down_read(&uts_sem);
535 error = -EFAULT;
536 if (copy_to_user(name + 0, utsname()->sysname, 32))
537 goto out;
538 if (copy_to_user(name + 32, utsname()->nodename, 32))
539 goto out;
540 if (copy_to_user(name + 64, utsname()->release, 32))
541 goto out;
542 if (copy_to_user(name + 96, utsname()->version, 32))
543 goto out;
544 if (copy_to_user(name + 128, utsname()->machine, 32))
545 goto out;
546
547 error = 0;
548 out:
549 up_read(&uts_sem);
550 return error;
551 }
552
553 SYSCALL_DEFINE0(getpagesize)
554 {
555 return PAGE_SIZE;
556 }
557
558 SYSCALL_DEFINE0(getdtablesize)
559 {
560 return sysctl_nr_open;
561 }
562
563 /*
564 * For compatibility with OSF/1 only. Use utsname(2) instead.
565 */
566 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
567 {
568 unsigned len;
569 int i;
570
571 if (!access_ok(VERIFY_WRITE, name, namelen))
572 return -EFAULT;
573
574 len = namelen;
575 if (len > 32)
576 len = 32;
577
578 down_read(&uts_sem);
579 for (i = 0; i < len; ++i) {
580 __put_user(utsname()->domainname[i], name + i);
581 if (utsname()->domainname[i] == '\0')
582 break;
583 }
584 up_read(&uts_sem);
585
586 return 0;
587 }
588
589 /*
590 * The following stuff should move into a header file should it ever
591 * be labeled "officially supported." Right now, there is just enough
592 * support to avoid applications (such as tar) printing error
593 * messages. The attributes are not really implemented.
594 */
595
596 /*
597 * Values for Property list entry flag
598 */
599 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
600 by default */
601 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
602 #define PLE_FLAG_ALL -1 /* All flag value */
603
604 struct proplistname_args {
605 unsigned int pl_mask;
606 unsigned int pl_numnames;
607 char **pl_names;
608 };
609
610 union pl_args {
611 struct setargs {
612 char __user *path;
613 long follow;
614 long nbytes;
615 char __user *buf;
616 } set;
617 struct fsetargs {
618 long fd;
619 long nbytes;
620 char __user *buf;
621 } fset;
622 struct getargs {
623 char __user *path;
624 long follow;
625 struct proplistname_args __user *name_args;
626 long nbytes;
627 char __user *buf;
628 int __user *min_buf_size;
629 } get;
630 struct fgetargs {
631 long fd;
632 struct proplistname_args __user *name_args;
633 long nbytes;
634 char __user *buf;
635 int __user *min_buf_size;
636 } fget;
637 struct delargs {
638 char __user *path;
639 long follow;
640 struct proplistname_args __user *name_args;
641 } del;
642 struct fdelargs {
643 long fd;
644 struct proplistname_args __user *name_args;
645 } fdel;
646 };
647
648 enum pl_code {
649 PL_SET = 1, PL_FSET = 2,
650 PL_GET = 3, PL_FGET = 4,
651 PL_DEL = 5, PL_FDEL = 6
652 };
653
654 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
655 union pl_args __user *, args)
656 {
657 long error;
658 int __user *min_buf_size_ptr;
659
660 switch (code) {
661 case PL_SET:
662 if (get_user(error, &args->set.nbytes))
663 error = -EFAULT;
664 break;
665 case PL_FSET:
666 if (get_user(error, &args->fset.nbytes))
667 error = -EFAULT;
668 break;
669 case PL_GET:
670 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
671 if (error)
672 break;
673 error = put_user(0, min_buf_size_ptr);
674 break;
675 case PL_FGET:
676 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
677 if (error)
678 break;
679 error = put_user(0, min_buf_size_ptr);
680 break;
681 case PL_DEL:
682 case PL_FDEL:
683 error = 0;
684 break;
685 default:
686 error = -EOPNOTSUPP;
687 break;
688 };
689 return error;
690 }
691
692 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
693 struct sigstack __user *, uoss)
694 {
695 unsigned long usp = rdusp();
696 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
697 unsigned long oss_os = on_sig_stack(usp);
698 int error;
699
700 if (uss) {
701 void __user *ss_sp;
702
703 error = -EFAULT;
704 if (get_user(ss_sp, &uss->ss_sp))
705 goto out;
706
707 /* If the current stack was set with sigaltstack, don't
708 swap stacks while we are on it. */
709 error = -EPERM;
710 if (current->sas_ss_sp && on_sig_stack(usp))
711 goto out;
712
713 /* Since we don't know the extent of the stack, and we don't
714 track onstack-ness, but rather calculate it, we must
715 presume a size. Ho hum this interface is lossy. */
716 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
717 current->sas_ss_size = SIGSTKSZ;
718 }
719
720 if (uoss) {
721 error = -EFAULT;
722 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
723 || __put_user(oss_sp, &uoss->ss_sp)
724 || __put_user(oss_os, &uoss->ss_onstack))
725 goto out;
726 }
727
728 error = 0;
729 out:
730 return error;
731 }
732
733 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
734 {
735 const char *sysinfo_table[] = {
736 utsname()->sysname,
737 utsname()->nodename,
738 utsname()->release,
739 utsname()->version,
740 utsname()->machine,
741 "alpha", /* instruction set architecture */
742 "dummy", /* hardware serial number */
743 "dummy", /* hardware manufacturer */
744 "dummy", /* secure RPC domain */
745 };
746 unsigned long offset;
747 const char *res;
748 long len, err = -EINVAL;
749
750 offset = command-1;
751 if (offset >= ARRAY_SIZE(sysinfo_table)) {
752 /* Digital UNIX has a few unpublished interfaces here */
753 printk("sysinfo(%d)", command);
754 goto out;
755 }
756
757 down_read(&uts_sem);
758 res = sysinfo_table[offset];
759 len = strlen(res)+1;
760 if ((unsigned long)len > (unsigned long)count)
761 len = count;
762 if (copy_to_user(buf, res, len))
763 err = -EFAULT;
764 else
765 err = 0;
766 up_read(&uts_sem);
767 out:
768 return err;
769 }
770
771 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
772 unsigned long, nbytes, int __user *, start, void __user *, arg)
773 {
774 unsigned long w;
775 struct percpu_struct *cpu;
776
777 switch (op) {
778 case GSI_IEEE_FP_CONTROL:
779 /* Return current software fp control & status bits. */
780 /* Note that DU doesn't verify available space here. */
781
782 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
783 w = swcr_update_status(w, rdfpcr());
784 if (put_user(w, (unsigned long __user *) buffer))
785 return -EFAULT;
786 return 0;
787
788 case GSI_IEEE_STATE_AT_SIGNAL:
789 /*
790 * Not sure anybody will ever use this weird stuff. These
791 * ops can be used (under OSF/1) to set the fpcr that should
792 * be used when a signal handler starts executing.
793 */
794 break;
795
796 case GSI_UACPROC:
797 if (nbytes < sizeof(unsigned int))
798 return -EINVAL;
799 w = (current_thread_info()->flags >> ALPHA_UAC_SHIFT) &
800 UAC_BITMASK;
801 if (put_user(w, (unsigned int __user *)buffer))
802 return -EFAULT;
803 return 1;
804
805 case GSI_PROC_TYPE:
806 if (nbytes < sizeof(unsigned long))
807 return -EINVAL;
808 cpu = (struct percpu_struct*)
809 ((char*)hwrpb + hwrpb->processor_offset);
810 w = cpu->type;
811 if (put_user(w, (unsigned long __user*)buffer))
812 return -EFAULT;
813 return 1;
814
815 case GSI_GET_HWRPB:
816 if (nbytes > sizeof(*hwrpb))
817 return -EINVAL;
818 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
819 return -EFAULT;
820 return 1;
821
822 default:
823 break;
824 }
825
826 return -EOPNOTSUPP;
827 }
828
829 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
830 unsigned long, nbytes, int __user *, start, void __user *, arg)
831 {
832 switch (op) {
833 case SSI_IEEE_FP_CONTROL: {
834 unsigned long swcr, fpcr;
835 unsigned int *state;
836
837 /*
838 * Alpha Architecture Handbook 4.7.7.3:
839 * To be fully IEEE compiant, we must track the current IEEE
840 * exception state in software, because spurious bits can be
841 * set in the trap shadow of a software-complete insn.
842 */
843
844 if (get_user(swcr, (unsigned long __user *)buffer))
845 return -EFAULT;
846 state = &current_thread_info()->ieee_state;
847
848 /* Update softare trap enable bits. */
849 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
850
851 /* Update the real fpcr. */
852 fpcr = rdfpcr() & FPCR_DYN_MASK;
853 fpcr |= ieee_swcr_to_fpcr(swcr);
854 wrfpcr(fpcr);
855
856 return 0;
857 }
858
859 case SSI_IEEE_RAISE_EXCEPTION: {
860 unsigned long exc, swcr, fpcr, fex;
861 unsigned int *state;
862
863 if (get_user(exc, (unsigned long __user *)buffer))
864 return -EFAULT;
865 state = &current_thread_info()->ieee_state;
866 exc &= IEEE_STATUS_MASK;
867
868 /* Update softare trap enable bits. */
869 swcr = (*state & IEEE_SW_MASK) | exc;
870 *state |= exc;
871
872 /* Update the real fpcr. */
873 fpcr = rdfpcr();
874 fpcr |= ieee_swcr_to_fpcr(swcr);
875 wrfpcr(fpcr);
876
877 /* If any exceptions set by this call, and are unmasked,
878 send a signal. Old exceptions are not signaled. */
879 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
880 if (fex) {
881 siginfo_t info;
882 int si_code = 0;
883
884 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
885 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
886 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
887 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
888 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
889 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
890
891 info.si_signo = SIGFPE;
892 info.si_errno = 0;
893 info.si_code = si_code;
894 info.si_addr = NULL; /* FIXME */
895 send_sig_info(SIGFPE, &info, current);
896 }
897 return 0;
898 }
899
900 case SSI_IEEE_STATE_AT_SIGNAL:
901 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
902 /*
903 * Not sure anybody will ever use this weird stuff. These
904 * ops can be used (under OSF/1) to set the fpcr that should
905 * be used when a signal handler starts executing.
906 */
907 break;
908
909 case SSI_NVPAIRS: {
910 unsigned long v, w, i;
911 unsigned int old, new;
912
913 for (i = 0; i < nbytes; ++i) {
914
915 if (get_user(v, 2*i + (unsigned int __user *)buffer))
916 return -EFAULT;
917 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
918 return -EFAULT;
919 switch (v) {
920 case SSIN_UACPROC:
921 again:
922 old = current_thread_info()->flags;
923 new = old & ~(UAC_BITMASK << ALPHA_UAC_SHIFT);
924 new = new | (w & UAC_BITMASK) << ALPHA_UAC_SHIFT;
925 if (cmpxchg(&current_thread_info()->flags,
926 old, new) != old)
927 goto again;
928 break;
929
930 default:
931 return -EOPNOTSUPP;
932 }
933 }
934 return 0;
935 }
936
937 case SSI_LMF:
938 return 0;
939
940 default:
941 break;
942 }
943
944 return -EOPNOTSUPP;
945 }
946
947 /* Translations due to the fact that OSF's time_t is an int. Which
948 affects all sorts of things, like timeval and itimerval. */
949
950 extern struct timezone sys_tz;
951
952 struct timeval32
953 {
954 int tv_sec, tv_usec;
955 };
956
957 struct itimerval32
958 {
959 struct timeval32 it_interval;
960 struct timeval32 it_value;
961 };
962
963 static inline long
964 get_tv32(struct timeval *o, struct timeval32 __user *i)
965 {
966 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
967 (__get_user(o->tv_sec, &i->tv_sec) |
968 __get_user(o->tv_usec, &i->tv_usec)));
969 }
970
971 static inline long
972 put_tv32(struct timeval32 __user *o, struct timeval *i)
973 {
974 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
975 (__put_user(i->tv_sec, &o->tv_sec) |
976 __put_user(i->tv_usec, &o->tv_usec)));
977 }
978
979 static inline long
980 get_it32(struct itimerval *o, struct itimerval32 __user *i)
981 {
982 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
983 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
984 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
985 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
986 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
987 }
988
989 static inline long
990 put_it32(struct itimerval32 __user *o, struct itimerval *i)
991 {
992 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
993 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
994 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
995 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
996 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
997 }
998
999 static inline void
1000 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
1001 {
1002 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
1003 value->tv_sec = jiffies / HZ;
1004 }
1005
1006 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
1007 struct timezone __user *, tz)
1008 {
1009 if (tv) {
1010 struct timeval ktv;
1011 do_gettimeofday(&ktv);
1012 if (put_tv32(tv, &ktv))
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 timespec kts;
1026 struct timezone ktz;
1027
1028 if (tv) {
1029 if (get_tv32((struct timeval *)&kts, tv))
1030 return -EFAULT;
1031 }
1032 if (tz) {
1033 if (copy_from_user(&ktz, tz, sizeof(*tz)))
1034 return -EFAULT;
1035 }
1036
1037 kts.tv_nsec *= 1000;
1038
1039 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
1040 }
1041
1042 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
1043 {
1044 struct itimerval kit;
1045 int error;
1046
1047 error = do_getitimer(which, &kit);
1048 if (!error && put_it32(it, &kit))
1049 error = -EFAULT;
1050
1051 return error;
1052 }
1053
1054 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
1055 struct itimerval32 __user *, out)
1056 {
1057 struct itimerval kin, kout;
1058 int error;
1059
1060 if (in) {
1061 if (get_it32(&kin, in))
1062 return -EFAULT;
1063 } else
1064 memset(&kin, 0, sizeof(kin));
1065
1066 error = do_setitimer(which, &kin, out ? &kout : NULL);
1067 if (error || !out)
1068 return error;
1069
1070 if (put_it32(out, &kout))
1071 return -EFAULT;
1072
1073 return 0;
1074
1075 }
1076
1077 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1078 struct timeval32 __user *, tvs)
1079 {
1080 struct timespec tv[2];
1081
1082 if (tvs) {
1083 struct timeval ktvs[2];
1084 if (get_tv32(&ktvs[0], &tvs[0]) ||
1085 get_tv32(&ktvs[1], &tvs[1]))
1086 return -EFAULT;
1087
1088 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
1089 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
1090 return -EINVAL;
1091
1092 tv[0].tv_sec = ktvs[0].tv_sec;
1093 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
1094 tv[1].tv_sec = ktvs[1].tv_sec;
1095 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
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 timespec end_time, *to = NULL;
1105 if (tvp) {
1106 time_t sec, usec;
1107
1108 to = &end_time;
1109
1110 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
1111 || __get_user(sec, &tvp->tv_sec)
1112 || __get_user(usec, &tvp->tv_usec)) {
1113 return -EFAULT;
1114 }
1115
1116 if (sec < 0 || usec < 0)
1117 return -EINVAL;
1118
1119 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC))
1120 return -EINVAL;
1121
1122 }
1123
1124 /* OSF does not copy back the remaining time. */
1125 return core_sys_select(n, inp, outp, exp, to);
1126 }
1127
1128 struct rusage32 {
1129 struct timeval32 ru_utime; /* user time used */
1130 struct timeval32 ru_stime; /* system time used */
1131 long ru_maxrss; /* maximum resident set size */
1132 long ru_ixrss; /* integral shared memory size */
1133 long ru_idrss; /* integral unshared data size */
1134 long ru_isrss; /* integral unshared stack size */
1135 long ru_minflt; /* page reclaims */
1136 long ru_majflt; /* page faults */
1137 long ru_nswap; /* swaps */
1138 long ru_inblock; /* block input operations */
1139 long ru_oublock; /* block output operations */
1140 long ru_msgsnd; /* messages sent */
1141 long ru_msgrcv; /* messages received */
1142 long ru_nsignals; /* signals received */
1143 long ru_nvcsw; /* voluntary context switches */
1144 long ru_nivcsw; /* involuntary " */
1145 };
1146
1147 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1148 {
1149 struct rusage32 r;
1150
1151 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1152 return -EINVAL;
1153
1154 memset(&r, 0, sizeof(r));
1155 switch (who) {
1156 case RUSAGE_SELF:
1157 jiffies_to_timeval32(current->utime, &r.ru_utime);
1158 jiffies_to_timeval32(current->stime, &r.ru_stime);
1159 r.ru_minflt = current->min_flt;
1160 r.ru_majflt = current->maj_flt;
1161 break;
1162 case RUSAGE_CHILDREN:
1163 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1164 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1165 r.ru_minflt = current->signal->cmin_flt;
1166 r.ru_majflt = current->signal->cmaj_flt;
1167 break;
1168 }
1169
1170 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1171 }
1172
1173 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1174 struct rusage32 __user *, ur)
1175 {
1176 struct rusage r;
1177 long ret, err;
1178 unsigned int status = 0;
1179 mm_segment_t old_fs;
1180
1181 if (!ur)
1182 return sys_wait4(pid, ustatus, options, NULL);
1183
1184 old_fs = get_fs();
1185
1186 set_fs (KERNEL_DS);
1187 ret = sys_wait4(pid, (unsigned int __user *) &status, options,
1188 (struct rusage __user *) &r);
1189 set_fs (old_fs);
1190
1191 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1192 return -EFAULT;
1193
1194 err = 0;
1195 err |= put_user(status, ustatus);
1196 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1197 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1198 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1199 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1200 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1201 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1202 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1203 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1204 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1205 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1206 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1207 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1208 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1209 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1210 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1211 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1212 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1213 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1214
1215 return err ? err : ret;
1216 }
1217
1218 /*
1219 * I don't know what the parameters are: the first one
1220 * seems to be a timeval pointer, and I suspect the second
1221 * one is the time remaining.. Ho humm.. No documentation.
1222 */
1223 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1224 struct timeval32 __user *, remain)
1225 {
1226 struct timeval tmp;
1227 unsigned long ticks;
1228
1229 if (get_tv32(&tmp, sleep))
1230 goto fault;
1231
1232 ticks = timeval_to_jiffies(&tmp);
1233
1234 ticks = schedule_timeout_interruptible(ticks);
1235
1236 if (remain) {
1237 jiffies_to_timeval(ticks, &tmp);
1238 if (put_tv32(remain, &tmp))
1239 goto fault;
1240 }
1241
1242 return 0;
1243 fault:
1244 return -EFAULT;
1245 }
1246
1247
1248 struct timex32 {
1249 unsigned int modes; /* mode selector */
1250 long offset; /* time offset (usec) */
1251 long freq; /* frequency offset (scaled ppm) */
1252 long maxerror; /* maximum error (usec) */
1253 long esterror; /* estimated error (usec) */
1254 int status; /* clock command/status */
1255 long constant; /* pll time constant */
1256 long precision; /* clock precision (usec) (read only) */
1257 long tolerance; /* clock frequency tolerance (ppm)
1258 * (read only)
1259 */
1260 struct timeval32 time; /* (read only) */
1261 long tick; /* (modified) usecs between clock ticks */
1262
1263 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1264 long jitter; /* pps jitter (us) (ro) */
1265 int shift; /* interval duration (s) (shift) (ro) */
1266 long stabil; /* pps stability (scaled ppm) (ro) */
1267 long jitcnt; /* jitter limit exceeded (ro) */
1268 long calcnt; /* calibration intervals (ro) */
1269 long errcnt; /* calibration errors (ro) */
1270 long stbcnt; /* stability limit exceeded (ro) */
1271
1272 int :32; int :32; int :32; int :32;
1273 int :32; int :32; int :32; int :32;
1274 int :32; int :32; int :32; int :32;
1275 };
1276
1277 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1278 {
1279 struct timex txc;
1280 int ret;
1281
1282 /* copy relevant bits of struct timex. */
1283 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1284 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1285 offsetof(struct timex32, time)))
1286 return -EFAULT;
1287
1288 ret = do_adjtimex(&txc);
1289 if (ret < 0)
1290 return ret;
1291
1292 /* copy back to timex32 */
1293 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1294 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1295 offsetof(struct timex32, tick))) ||
1296 (put_tv32(&txc_p->time, &txc.time)))
1297 return -EFAULT;
1298
1299 return ret;
1300 }
1301
1302 /* Get an address range which is currently unmapped. Similar to the
1303 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1304
1305 static unsigned long
1306 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1307 unsigned long limit)
1308 {
1309 struct vm_area_struct *vma = find_vma(current->mm, addr);
1310
1311 while (1) {
1312 /* At this point: (!vma || addr < vma->vm_end). */
1313 if (limit - len < addr)
1314 return -ENOMEM;
1315 if (!vma || addr + len <= vma->vm_start)
1316 return addr;
1317 addr = vma->vm_end;
1318 vma = vma->vm_next;
1319 }
1320 }
1321
1322 unsigned long
1323 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1324 unsigned long len, unsigned long pgoff,
1325 unsigned long flags)
1326 {
1327 unsigned long limit;
1328
1329 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1330 if (current->personality & ADDR_LIMIT_32BIT)
1331 limit = 0x80000000;
1332 else
1333 limit = TASK_SIZE;
1334
1335 if (len > limit)
1336 return -ENOMEM;
1337
1338 if (flags & MAP_FIXED)
1339 return addr;
1340
1341 /* First, see if the given suggestion fits.
1342
1343 The OSF/1 loader (/sbin/loader) relies on us returning an
1344 address larger than the requested if one exists, which is
1345 a terribly broken way to program.
1346
1347 That said, I can see the use in being able to suggest not
1348 merely specific addresses, but regions of memory -- perhaps
1349 this feature should be incorporated into all ports? */
1350
1351 if (addr) {
1352 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1353 if (addr != (unsigned long) -ENOMEM)
1354 return addr;
1355 }
1356
1357 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1358 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1359 len, limit);
1360 if (addr != (unsigned long) -ENOMEM)
1361 return addr;
1362
1363 /* Finally, try allocating in low memory. */
1364 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1365
1366 return addr;
1367 }
1368
1369 #ifdef CONFIG_OSF4_COMPAT
1370
1371 /* Clear top 32 bits of iov_len in the user's buffer for
1372 compatibility with old versions of OSF/1 where iov_len
1373 was defined as int. */
1374 static int
1375 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1376 {
1377 unsigned long i;
1378
1379 for (i = 0 ; i < count ; i++) {
1380 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1381
1382 if (put_user(0, iov_len_high))
1383 return -EFAULT;
1384 }
1385 return 0;
1386 }
1387
1388 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1389 const struct iovec __user *, vector, unsigned long, count)
1390 {
1391 if (unlikely(personality(current->personality) == PER_OSF4))
1392 if (osf_fix_iov_len(vector, count))
1393 return -EFAULT;
1394 return sys_readv(fd, vector, count);
1395 }
1396
1397 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1398 const struct iovec __user *, vector, unsigned long, count)
1399 {
1400 if (unlikely(personality(current->personality) == PER_OSF4))
1401 if (osf_fix_iov_len(vector, count))
1402 return -EFAULT;
1403 return sys_writev(fd, vector, count);
1404 }
1405
1406 #endif
1407
1408 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1409 {
1410 int prio = sys_getpriority(which, who);
1411 if (prio >= 0) {
1412 /* Return value is the unbiased priority, i.e. 20 - prio.
1413 This does result in negative return values, so signal
1414 no error */
1415 force_successful_syscall_return();
1416 prio = 20 - prio;
1417 }
1418 return prio;
1419 }
1420
1421 SYSCALL_DEFINE0(getxuid)
1422 {
1423 current_pt_regs()->r20 = sys_geteuid();
1424 return sys_getuid();
1425 }
1426
1427 SYSCALL_DEFINE0(getxgid)
1428 {
1429 current_pt_regs()->r20 = sys_getegid();
1430 return sys_getgid();
1431 }
1432
1433 SYSCALL_DEFINE0(getxpid)
1434 {
1435 current_pt_regs()->r20 = sys_getppid();
1436 return sys_getpid();
1437 }
1438
1439 SYSCALL_DEFINE0(alpha_pipe)
1440 {
1441 int fd[2];
1442 int res = do_pipe_flags(fd, 0);
1443 if (!res) {
1444 /* The return values are in $0 and $20. */
1445 current_pt_regs()->r20 = fd[1];
1446 res = fd[0];
1447 }
1448 return res;
1449 }
1450
1451 SYSCALL_DEFINE1(sethae, unsigned long, val)
1452 {
1453 current_pt_regs()->hae = val;
1454 return 0;
1455 }
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