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Linux 4.9.199
[linux/fpc-iii.git] / arch / alpha / kernel / osf_sys.c
blob6e0d549eb3bb457ffb76c39fe3aeeb683b42acd0
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 dir_context ctx;
100 struct osf_dirent __user *dirent;
101 long __user *basep;
102 unsigned int count;
103 int error;
104 };
105
106 static int
107 osf_filldir(struct dir_context *ctx, const char *name, int namlen,
108 loff_t offset, u64 ino, unsigned int d_type)
109 {
110 struct osf_dirent __user *dirent;
111 struct osf_dirent_callback *buf =
112 container_of(ctx, struct osf_dirent_callback, ctx);
113 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
114 unsigned int d_ino;
115
116 buf->error = -EINVAL; /* only used if we fail */
117 if (reclen > buf->count)
118 return -EINVAL;
119 d_ino = ino;
120 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
121 buf->error = -EOVERFLOW;
122 return -EOVERFLOW;
123 }
124 if (buf->basep) {
125 if (put_user(offset, buf->basep))
126 goto Efault;
127 buf->basep = NULL;
128 }
129 dirent = buf->dirent;
130 if (put_user(d_ino, &dirent->d_ino) ||
131 put_user(namlen, &dirent->d_namlen) ||
132 put_user(reclen, &dirent->d_reclen) ||
133 copy_to_user(dirent->d_name, name, namlen) ||
134 put_user(0, dirent->d_name + namlen))
135 goto Efault;
136 dirent = (void __user *)dirent + reclen;
137 buf->dirent = dirent;
138 buf->count -= reclen;
139 return 0;
140 Efault:
141 buf->error = -EFAULT;
142 return -EFAULT;
143 }
144
145 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
146 struct osf_dirent __user *, dirent, unsigned int, count,
147 long __user *, basep)
148 {
149 int error;
150 struct fd arg = fdget_pos(fd);
151 struct osf_dirent_callback buf = {
152 .ctx.actor = osf_filldir,
153 .dirent = dirent,
154 .basep = basep,
155 .count = count
156 };
157
158 if (!arg.file)
159 return -EBADF;
160
161 error = iterate_dir(arg.file, &buf.ctx);
162 if (error >= 0)
163 error = buf.error;
164 if (count != buf.count)
165 error = count - buf.count;
166
167 fdput_pos(arg);
168 return error;
169 }
170
171 #undef NAME_OFFSET
172
173 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
174 unsigned long, prot, unsigned long, flags, unsigned long, fd,
175 unsigned long, off)
176 {
177 unsigned long ret = -EINVAL;
178
179 #if 0
180 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
181 printk("%s: unimplemented OSF mmap flags %04lx\n",
182 current->comm, flags);
183 #endif
184 if ((off + PAGE_ALIGN(len)) < off)
185 goto out;
186 if (off & ~PAGE_MASK)
187 goto out;
188 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
189 out:
190 return ret;
191 }
192
193 struct osf_stat {
194 int st_dev;
195 int st_pad1;
196 unsigned st_mode;
197 unsigned short st_nlink;
198 short st_nlink_reserved;
199 unsigned st_uid;
200 unsigned st_gid;
201 int st_rdev;
202 int st_ldev;
203 long st_size;
204 int st_pad2;
205 int st_uatime;
206 int st_pad3;
207 int st_umtime;
208 int st_pad4;
209 int st_uctime;
210 int st_pad5;
211 int st_pad6;
212 unsigned st_flags;
213 unsigned st_gen;
214 long st_spare[4];
215 unsigned st_ino;
216 int st_ino_reserved;
217 int st_atime;
218 int st_atime_reserved;
219 int st_mtime;
220 int st_mtime_reserved;
221 int st_ctime;
222 int st_ctime_reserved;
223 long st_blksize;
224 long st_blocks;
225 };
226
227 /*
228 * The OSF/1 statfs structure is much larger, but this should
229 * match the beginning, at least.
230 */
231 struct osf_statfs {
232 short f_type;
233 short f_flags;
234 int f_fsize;
235 int f_bsize;
236 int f_blocks;
237 int f_bfree;
238 int f_bavail;
239 int f_files;
240 int f_ffree;
241 __kernel_fsid_t f_fsid;
242 };
243
244 struct osf_statfs64 {
245 short f_type;
246 short f_flags;
247 int f_pad1;
248 int f_pad2;
249 int f_pad3;
250 int f_pad4;
251 int f_pad5;
252 int f_pad6;
253 int f_pad7;
254 __kernel_fsid_t f_fsid;
255 u_short f_namemax;
256 short f_reserved1;
257 int f_spare[8];
258 char f_pad8[90];
259 char f_pad9[90];
260 long mount_info[10];
261 u_long f_flags2;
262 long f_spare2[14];
263 long f_fsize;
264 long f_bsize;
265 long f_blocks;
266 long f_bfree;
267 long f_bavail;
268 long f_files;
269 long f_ffree;
270 };
271
272 static int
273 linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat)
274 {
275 struct osf_stat tmp = { 0 };
276
277 tmp.st_dev = lstat->dev;
278 tmp.st_mode = lstat->mode;
279 tmp.st_nlink = lstat->nlink;
280 tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid);
281 tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid);
282 tmp.st_rdev = lstat->rdev;
283 tmp.st_ldev = lstat->rdev;
284 tmp.st_size = lstat->size;
285 tmp.st_uatime = lstat->atime.tv_nsec / 1000;
286 tmp.st_umtime = lstat->mtime.tv_nsec / 1000;
287 tmp.st_uctime = lstat->ctime.tv_nsec / 1000;
288 tmp.st_ino = lstat->ino;
289 tmp.st_atime = lstat->atime.tv_sec;
290 tmp.st_mtime = lstat->mtime.tv_sec;
291 tmp.st_ctime = lstat->ctime.tv_sec;
292 tmp.st_blksize = lstat->blksize;
293 tmp.st_blocks = lstat->blocks;
294
295 return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0;
296 }
297
298 static int
299 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
300 unsigned long bufsiz)
301 {
302 struct osf_statfs tmp_stat;
303
304 tmp_stat.f_type = linux_stat->f_type;
305 tmp_stat.f_flags = 0; /* mount flags */
306 tmp_stat.f_fsize = linux_stat->f_frsize;
307 tmp_stat.f_bsize = linux_stat->f_bsize;
308 tmp_stat.f_blocks = linux_stat->f_blocks;
309 tmp_stat.f_bfree = linux_stat->f_bfree;
310 tmp_stat.f_bavail = linux_stat->f_bavail;
311 tmp_stat.f_files = linux_stat->f_files;
312 tmp_stat.f_ffree = linux_stat->f_ffree;
313 tmp_stat.f_fsid = linux_stat->f_fsid;
314 if (bufsiz > sizeof(tmp_stat))
315 bufsiz = sizeof(tmp_stat);
316 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
317 }
318
319 static int
320 linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat,
321 unsigned long bufsiz)
322 {
323 struct osf_statfs64 tmp_stat = { 0 };
324
325 tmp_stat.f_type = linux_stat->f_type;
326 tmp_stat.f_fsize = linux_stat->f_frsize;
327 tmp_stat.f_bsize = linux_stat->f_bsize;
328 tmp_stat.f_blocks = linux_stat->f_blocks;
329 tmp_stat.f_bfree = linux_stat->f_bfree;
330 tmp_stat.f_bavail = linux_stat->f_bavail;
331 tmp_stat.f_files = linux_stat->f_files;
332 tmp_stat.f_ffree = linux_stat->f_ffree;
333 tmp_stat.f_fsid = linux_stat->f_fsid;
334 if (bufsiz > sizeof(tmp_stat))
335 bufsiz = sizeof(tmp_stat);
336 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
337 }
338
339 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
340 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
341 {
342 struct kstatfs linux_stat;
343 int error = user_statfs(pathname, &linux_stat);
344 if (!error)
345 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
346 return error;
347 }
348
349 SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
350 {
351 struct kstat stat;
352 int error;
353
354 error = vfs_stat(name, &stat);
355 if (error)
356 return error;
357
358 return linux_to_osf_stat(&stat, buf);
359 }
360
361 SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf)
362 {
363 struct kstat stat;
364 int error;
365
366 error = vfs_lstat(name, &stat);
367 if (error)
368 return error;
369
370 return linux_to_osf_stat(&stat, buf);
371 }
372
373 SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf)
374 {
375 struct kstat stat;
376 int error;
377
378 error = vfs_fstat(fd, &stat);
379 if (error)
380 return error;
381
382 return linux_to_osf_stat(&stat, buf);
383 }
384
385 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
386 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
387 {
388 struct kstatfs linux_stat;
389 int error = fd_statfs(fd, &linux_stat);
390 if (!error)
391 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
392 return error;
393 }
394
395 SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname,
396 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
397 {
398 struct kstatfs linux_stat;
399 int error = user_statfs(pathname, &linux_stat);
400 if (!error)
401 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
402 return error;
403 }
404
405 SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd,
406 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
407 {
408 struct kstatfs linux_stat;
409 int error = fd_statfs(fd, &linux_stat);
410 if (!error)
411 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
412 return error;
413 }
414
415 /*
416 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
417 *
418 * Although to be frank, neither are the native Linux/i386 ones..
419 */
420 struct ufs_args {
421 char __user *devname;
422 int flags;
423 uid_t exroot;
424 };
425
426 struct cdfs_args {
427 char __user *devname;
428 int flags;
429 uid_t exroot;
430
431 /* This has lots more here, which Linux handles with the option block
432 but I'm too lazy to do the translation into ASCII. */
433 };
434
435 struct procfs_args {
436 char __user *devname;
437 int flags;
438 uid_t exroot;
439 };
440
441 /*
442 * We can't actually handle ufs yet, so we translate UFS mounts to
443 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
444 * layout is so braindead it's a major headache doing it.
445 *
446 * Just how long ago was it written? OTOH our UFS driver may be still
447 * unhappy with OSF UFS. [CHECKME]
448 */
449 static int
450 osf_ufs_mount(const char __user *dirname,
451 struct ufs_args __user *args, int flags)
452 {
453 int retval;
454 struct cdfs_args tmp;
455 struct filename *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->name, dirname, "ext2", flags, NULL);
465 putname(devname);
466 out:
467 return retval;
468 }
469
470 static int
471 osf_cdfs_mount(const char __user *dirname,
472 struct cdfs_args __user *args, int flags)
473 {
474 int retval;
475 struct cdfs_args tmp;
476 struct filename *devname;
477
478 retval = -EFAULT;
479 if (copy_from_user(&tmp, args, sizeof(tmp)))
480 goto out;
481 devname = getname(tmp.devname);
482 retval = PTR_ERR(devname);
483 if (IS_ERR(devname))
484 goto out;
485 retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
486 putname(devname);
487 out:
488 return retval;
489 }
490
491 static int
492 osf_procfs_mount(const char __user *dirname,
493 struct procfs_args __user *args, int flags)
494 {
495 struct procfs_args tmp;
496
497 if (copy_from_user(&tmp, args, sizeof(tmp)))
498 return -EFAULT;
499
500 return do_mount("", dirname, "proc", flags, NULL);
501 }
502
503 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
504 int, flag, void __user *, data)
505 {
506 int retval;
507
508 switch (typenr) {
509 case 1:
510 retval = osf_ufs_mount(path, data, flag);
511 break;
512 case 6:
513 retval = osf_cdfs_mount(path, data, flag);
514 break;
515 case 9:
516 retval = osf_procfs_mount(path, data, flag);
517 break;
518 default:
519 retval = -EINVAL;
520 printk("osf_mount(%ld, %x)\n", typenr, flag);
521 }
522
523 return retval;
524 }
525
526 SYSCALL_DEFINE1(osf_utsname, char __user *, name)
527 {
528 int error;
529 char tmp[5 * 32];
530
531 down_read(&uts_sem);
532 memcpy(tmp + 0 * 32, utsname()->sysname, 32);
533 memcpy(tmp + 1 * 32, utsname()->nodename, 32);
534 memcpy(tmp + 2 * 32, utsname()->release, 32);
535 memcpy(tmp + 3 * 32, utsname()->version, 32);
536 memcpy(tmp + 4 * 32, utsname()->machine, 32);
537 up_read(&uts_sem);
538
539 if (copy_to_user(name, tmp, sizeof(tmp)))
540 return -EFAULT;
541 return 0;
542 }
543
544 SYSCALL_DEFINE0(getpagesize)
545 {
546 return PAGE_SIZE;
547 }
548
549 SYSCALL_DEFINE0(getdtablesize)
550 {
551 return sysctl_nr_open;
552 }
553
554 /*
555 * For compatibility with OSF/1 only. Use utsname(2) instead.
556 */
557 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
558 {
559 int len, err = 0;
560 char *kname;
561 char tmp[32];
562
563 if (namelen < 0 || namelen > 32)
564 namelen = 32;
565
566 down_read(&uts_sem);
567 kname = utsname()->domainname;
568 len = strnlen(kname, namelen);
569 len = min(len + 1, namelen);
570 memcpy(tmp, kname, len);
571 up_read(&uts_sem);
572
573 if (copy_to_user(name, tmp, len))
574 return -EFAULT;
575 return 0;
576 }
577
578 /*
579 * The following stuff should move into a header file should it ever
580 * be labeled "officially supported." Right now, there is just enough
581 * support to avoid applications (such as tar) printing error
582 * messages. The attributes are not really implemented.
583 */
584
585 /*
586 * Values for Property list entry flag
587 */
588 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
589 by default */
590 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
591 #define PLE_FLAG_ALL -1 /* All flag value */
592
593 struct proplistname_args {
594 unsigned int pl_mask;
595 unsigned int pl_numnames;
596 char **pl_names;
597 };
598
599 union pl_args {
600 struct setargs {
601 char __user *path;
602 long follow;
603 long nbytes;
604 char __user *buf;
605 } set;
606 struct fsetargs {
607 long fd;
608 long nbytes;
609 char __user *buf;
610 } fset;
611 struct getargs {
612 char __user *path;
613 long follow;
614 struct proplistname_args __user *name_args;
615 long nbytes;
616 char __user *buf;
617 int __user *min_buf_size;
618 } get;
619 struct fgetargs {
620 long fd;
621 struct proplistname_args __user *name_args;
622 long nbytes;
623 char __user *buf;
624 int __user *min_buf_size;
625 } fget;
626 struct delargs {
627 char __user *path;
628 long follow;
629 struct proplistname_args __user *name_args;
630 } del;
631 struct fdelargs {
632 long fd;
633 struct proplistname_args __user *name_args;
634 } fdel;
635 };
636
637 enum pl_code {
638 PL_SET = 1, PL_FSET = 2,
639 PL_GET = 3, PL_FGET = 4,
640 PL_DEL = 5, PL_FDEL = 6
641 };
642
643 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
644 union pl_args __user *, args)
645 {
646 long error;
647 int __user *min_buf_size_ptr;
648
649 switch (code) {
650 case PL_SET:
651 if (get_user(error, &args->set.nbytes))
652 error = -EFAULT;
653 break;
654 case PL_FSET:
655 if (get_user(error, &args->fset.nbytes))
656 error = -EFAULT;
657 break;
658 case PL_GET:
659 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
660 if (error)
661 break;
662 error = put_user(0, min_buf_size_ptr);
663 break;
664 case PL_FGET:
665 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
666 if (error)
667 break;
668 error = put_user(0, min_buf_size_ptr);
669 break;
670 case PL_DEL:
671 case PL_FDEL:
672 error = 0;
673 break;
674 default:
675 error = -EOPNOTSUPP;
676 break;
677 };
678 return error;
679 }
680
681 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
682 struct sigstack __user *, uoss)
683 {
684 unsigned long usp = rdusp();
685 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
686 unsigned long oss_os = on_sig_stack(usp);
687 int error;
688
689 if (uss) {
690 void __user *ss_sp;
691
692 error = -EFAULT;
693 if (get_user(ss_sp, &uss->ss_sp))
694 goto out;
695
696 /* If the current stack was set with sigaltstack, don't
697 swap stacks while we are on it. */
698 error = -EPERM;
699 if (current->sas_ss_sp && on_sig_stack(usp))
700 goto out;
701
702 /* Since we don't know the extent of the stack, and we don't
703 track onstack-ness, but rather calculate it, we must
704 presume a size. Ho hum this interface is lossy. */
705 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
706 current->sas_ss_size = SIGSTKSZ;
707 }
708
709 if (uoss) {
710 error = -EFAULT;
711 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
712 || __put_user(oss_sp, &uoss->ss_sp)
713 || __put_user(oss_os, &uoss->ss_onstack))
714 goto out;
715 }
716
717 error = 0;
718 out:
719 return error;
720 }
721
722 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
723 {
724 const char *sysinfo_table[] = {
725 utsname()->sysname,
726 utsname()->nodename,
727 utsname()->release,
728 utsname()->version,
729 utsname()->machine,
730 "alpha", /* instruction set architecture */
731 "dummy", /* hardware serial number */
732 "dummy", /* hardware manufacturer */
733 "dummy", /* secure RPC domain */
734 };
735 unsigned long offset;
736 const char *res;
737 long len;
738 char tmp[__NEW_UTS_LEN + 1];
739
740 offset = command-1;
741 if (offset >= ARRAY_SIZE(sysinfo_table)) {
742 /* Digital UNIX has a few unpublished interfaces here */
743 printk("sysinfo(%d)", command);
744 return -EINVAL;
745 }
746
747 down_read(&uts_sem);
748 res = sysinfo_table[offset];
749 len = strlen(res)+1;
750 if ((unsigned long)len > (unsigned long)count)
751 len = count;
752 memcpy(tmp, res, len);
753 up_read(&uts_sem);
754 if (copy_to_user(buf, tmp, len))
755 return -EFAULT;
756 return 0;
757 }
758
759 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
760 unsigned long, nbytes, int __user *, start, void __user *, arg)
761 {
762 unsigned long w;
763 struct percpu_struct *cpu;
764
765 switch (op) {
766 case GSI_IEEE_FP_CONTROL:
767 /* Return current software fp control & status bits. */
768 /* Note that DU doesn't verify available space here. */
769
770 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
771 w = swcr_update_status(w, rdfpcr());
772 if (put_user(w, (unsigned long __user *) buffer))
773 return -EFAULT;
774 return 0;
775
776 case GSI_IEEE_STATE_AT_SIGNAL:
777 /*
778 * Not sure anybody will ever use this weird stuff. These
779 * ops can be used (under OSF/1) to set the fpcr that should
780 * be used when a signal handler starts executing.
781 */
782 break;
783
784 case GSI_UACPROC:
785 if (nbytes < sizeof(unsigned int))
786 return -EINVAL;
787 w = current_thread_info()->status & UAC_BITMASK;
788 if (put_user(w, (unsigned int __user *)buffer))
789 return -EFAULT;
790 return 1;
791
792 case GSI_PROC_TYPE:
793 if (nbytes < sizeof(unsigned long))
794 return -EINVAL;
795 cpu = (struct percpu_struct*)
796 ((char*)hwrpb + hwrpb->processor_offset);
797 w = cpu->type;
798 if (put_user(w, (unsigned long __user*)buffer))
799 return -EFAULT;
800 return 1;
801
802 case GSI_GET_HWRPB:
803 if (nbytes > sizeof(*hwrpb))
804 return -EINVAL;
805 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
806 return -EFAULT;
807 return 1;
808
809 default:
810 break;
811 }
812
813 return -EOPNOTSUPP;
814 }
815
816 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
817 unsigned long, nbytes, int __user *, start, void __user *, arg)
818 {
819 switch (op) {
820 case SSI_IEEE_FP_CONTROL: {
821 unsigned long swcr, fpcr;
822 unsigned int *state;
823
824 /*
825 * Alpha Architecture Handbook 4.7.7.3:
826 * To be fully IEEE compiant, we must track the current IEEE
827 * exception state in software, because spurious bits can be
828 * set in the trap shadow of a software-complete insn.
829 */
830
831 if (get_user(swcr, (unsigned long __user *)buffer))
832 return -EFAULT;
833 state = &current_thread_info()->ieee_state;
834
835 /* Update softare trap enable bits. */
836 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
837
838 /* Update the real fpcr. */
839 fpcr = rdfpcr() & FPCR_DYN_MASK;
840 fpcr |= ieee_swcr_to_fpcr(swcr);
841 wrfpcr(fpcr);
842
843 return 0;
844 }
845
846 case SSI_IEEE_RAISE_EXCEPTION: {
847 unsigned long exc, swcr, fpcr, fex;
848 unsigned int *state;
849
850 if (get_user(exc, (unsigned long __user *)buffer))
851 return -EFAULT;
852 state = &current_thread_info()->ieee_state;
853 exc &= IEEE_STATUS_MASK;
854
855 /* Update softare trap enable bits. */
856 swcr = (*state & IEEE_SW_MASK) | exc;
857 *state |= exc;
858
859 /* Update the real fpcr. */
860 fpcr = rdfpcr();
861 fpcr |= ieee_swcr_to_fpcr(swcr);
862 wrfpcr(fpcr);
863
864 /* If any exceptions set by this call, and are unmasked,
865 send a signal. Old exceptions are not signaled. */
866 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
867 if (fex) {
868 siginfo_t info;
869 int si_code = 0;
870
871 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
872 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
873 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
874 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
875 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
876 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
877
878 info.si_signo = SIGFPE;
879 info.si_errno = 0;
880 info.si_code = si_code;
881 info.si_addr = NULL; /* FIXME */
882 send_sig_info(SIGFPE, &info, current);
883 }
884 return 0;
885 }
886
887 case SSI_IEEE_STATE_AT_SIGNAL:
888 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
889 /*
890 * Not sure anybody will ever use this weird stuff. These
891 * ops can be used (under OSF/1) to set the fpcr that should
892 * be used when a signal handler starts executing.
893 */
894 break;
895
896 case SSI_NVPAIRS: {
897 unsigned __user *p = buffer;
898 unsigned i;
899
900 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
901 unsigned v, w, status;
902
903 if (get_user(v, p) || get_user(w, p + 1))
904 return -EFAULT;
905 switch (v) {
906 case SSIN_UACPROC:
907 w &= UAC_BITMASK;
908 status = current_thread_info()->status;
909 status = (status & ~UAC_BITMASK) | w;
910 current_thread_info()->status = status;
911 break;
912
913 default:
914 return -EOPNOTSUPP;
915 }
916 }
917 return 0;
918 }
919
920 case SSI_LMF:
921 return 0;
922
923 default:
924 break;
925 }
926
927 return -EOPNOTSUPP;
928 }
929
930 /* Translations due to the fact that OSF's time_t is an int. Which
931 affects all sorts of things, like timeval and itimerval. */
932
933 extern struct timezone sys_tz;
934
935 struct timeval32
936 {
937 int tv_sec, tv_usec;
938 };
939
940 struct itimerval32
941 {
942 struct timeval32 it_interval;
943 struct timeval32 it_value;
944 };
945
946 static inline long
947 get_tv32(struct timeval *o, struct timeval32 __user *i)
948 {
949 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
950 (__get_user(o->tv_sec, &i->tv_sec) |
951 __get_user(o->tv_usec, &i->tv_usec)));
952 }
953
954 static inline long
955 put_tv32(struct timeval32 __user *o, struct timeval *i)
956 {
957 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
958 (__put_user(i->tv_sec, &o->tv_sec) |
959 __put_user(i->tv_usec, &o->tv_usec)));
960 }
961
962 static inline long
963 get_it32(struct itimerval *o, struct itimerval32 __user *i)
964 {
965 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
966 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
967 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
968 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
969 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
970 }
971
972 static inline long
973 put_it32(struct itimerval32 __user *o, struct itimerval *i)
974 {
975 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
976 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
977 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
978 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
979 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
980 }
981
982 static inline void
983 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
984 {
985 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
986 value->tv_sec = jiffies / HZ;
987 }
988
989 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
990 struct timezone __user *, tz)
991 {
992 if (tv) {
993 struct timeval ktv;
994 do_gettimeofday(&ktv);
995 if (put_tv32(tv, &ktv))
996 return -EFAULT;
997 }
998 if (tz) {
999 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
1000 return -EFAULT;
1001 }
1002 return 0;
1003 }
1004
1005 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
1006 struct timezone __user *, tz)
1007 {
1008 struct timespec kts;
1009 struct timezone ktz;
1010
1011 if (tv) {
1012 if (get_tv32((struct timeval *)&kts, tv))
1013 return -EFAULT;
1014 kts.tv_nsec *= 1000;
1015 }
1016 if (tz) {
1017 if (copy_from_user(&ktz, tz, sizeof(*tz)))
1018 return -EFAULT;
1019 }
1020
1021 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
1022 }
1023
1024 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
1025 {
1026 struct itimerval kit;
1027 int error;
1028
1029 error = do_getitimer(which, &kit);
1030 if (!error && put_it32(it, &kit))
1031 error = -EFAULT;
1032
1033 return error;
1034 }
1035
1036 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
1037 struct itimerval32 __user *, out)
1038 {
1039 struct itimerval kin, kout;
1040 int error;
1041
1042 if (in) {
1043 if (get_it32(&kin, in))
1044 return -EFAULT;
1045 } else
1046 memset(&kin, 0, sizeof(kin));
1047
1048 error = do_setitimer(which, &kin, out ? &kout : NULL);
1049 if (error || !out)
1050 return error;
1051
1052 if (put_it32(out, &kout))
1053 return -EFAULT;
1054
1055 return 0;
1056
1057 }
1058
1059 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1060 struct timeval32 __user *, tvs)
1061 {
1062 struct timespec tv[2];
1063
1064 if (tvs) {
1065 struct timeval ktvs[2];
1066 if (get_tv32(&ktvs[0], &tvs[0]) ||
1067 get_tv32(&ktvs[1], &tvs[1]))
1068 return -EFAULT;
1069
1070 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
1071 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
1072 return -EINVAL;
1073
1074 tv[0].tv_sec = ktvs[0].tv_sec;
1075 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
1076 tv[1].tv_sec = ktvs[1].tv_sec;
1077 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
1078 }
1079
1080 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1081 }
1082
1083 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1084 fd_set __user *, exp, struct timeval32 __user *, tvp)
1085 {
1086 struct timespec end_time, *to = NULL;
1087 if (tvp) {
1088 time_t sec, usec;
1089
1090 to = &end_time;
1091
1092 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
1093 || __get_user(sec, &tvp->tv_sec)
1094 || __get_user(usec, &tvp->tv_usec)) {
1095 return -EFAULT;
1096 }
1097
1098 if (sec < 0 || usec < 0)
1099 return -EINVAL;
1100
1101 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC))
1102 return -EINVAL;
1103
1104 }
1105
1106 /* OSF does not copy back the remaining time. */
1107 return core_sys_select(n, inp, outp, exp, to);
1108 }
1109
1110 struct rusage32 {
1111 struct timeval32 ru_utime; /* user time used */
1112 struct timeval32 ru_stime; /* system time used */
1113 long ru_maxrss; /* maximum resident set size */
1114 long ru_ixrss; /* integral shared memory size */
1115 long ru_idrss; /* integral unshared data size */
1116 long ru_isrss; /* integral unshared stack size */
1117 long ru_minflt; /* page reclaims */
1118 long ru_majflt; /* page faults */
1119 long ru_nswap; /* swaps */
1120 long ru_inblock; /* block input operations */
1121 long ru_oublock; /* block output operations */
1122 long ru_msgsnd; /* messages sent */
1123 long ru_msgrcv; /* messages received */
1124 long ru_nsignals; /* signals received */
1125 long ru_nvcsw; /* voluntary context switches */
1126 long ru_nivcsw; /* involuntary " */
1127 };
1128
1129 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1130 {
1131 struct rusage32 r;
1132 cputime_t utime, stime;
1133 unsigned long utime_jiffies, stime_jiffies;
1134
1135 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1136 return -EINVAL;
1137
1138 memset(&r, 0, sizeof(r));
1139 switch (who) {
1140 case RUSAGE_SELF:
1141 task_cputime(current, &utime, &stime);
1142 utime_jiffies = cputime_to_jiffies(utime);
1143 stime_jiffies = cputime_to_jiffies(stime);
1144 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1145 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1146 r.ru_minflt = current->min_flt;
1147 r.ru_majflt = current->maj_flt;
1148 break;
1149 case RUSAGE_CHILDREN:
1150 utime_jiffies = cputime_to_jiffies(current->signal->cutime);
1151 stime_jiffies = cputime_to_jiffies(current->signal->cstime);
1152 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1153 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1154 r.ru_minflt = current->signal->cmin_flt;
1155 r.ru_majflt = current->signal->cmaj_flt;
1156 break;
1157 }
1158
1159 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1160 }
1161
1162 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1163 struct rusage32 __user *, ur)
1164 {
1165 struct rusage r;
1166 long ret, err;
1167 unsigned int status = 0;
1168 mm_segment_t old_fs;
1169
1170 if (!ur)
1171 return sys_wait4(pid, ustatus, options, NULL);
1172
1173 old_fs = get_fs();
1174
1175 set_fs (KERNEL_DS);
1176 ret = sys_wait4(pid, (unsigned int __user *) &status, options,
1177 (struct rusage __user *) &r);
1178 set_fs (old_fs);
1179
1180 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1181 return -EFAULT;
1182
1183 err = put_user(status, ustatus);
1184 if (ret < 0)
1185 return err ? err : ret;
1186
1187 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1188 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1189 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1190 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1191 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1192 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1193 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1194 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1195 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1196 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1197 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1198 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1199 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1200 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1201 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1202 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1203 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1204 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1205
1206 return err ? err : ret;
1207 }
1208
1209 /*
1210 * I don't know what the parameters are: the first one
1211 * seems to be a timeval pointer, and I suspect the second
1212 * one is the time remaining.. Ho humm.. No documentation.
1213 */
1214 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1215 struct timeval32 __user *, remain)
1216 {
1217 struct timeval tmp;
1218 unsigned long ticks;
1219
1220 if (get_tv32(&tmp, sleep))
1221 goto fault;
1222
1223 ticks = timeval_to_jiffies(&tmp);
1224
1225 ticks = schedule_timeout_interruptible(ticks);
1226
1227 if (remain) {
1228 jiffies_to_timeval(ticks, &tmp);
1229 if (put_tv32(remain, &tmp))
1230 goto fault;
1231 }
1232
1233 return 0;
1234 fault:
1235 return -EFAULT;
1236 }
1237
1238
1239 struct timex32 {
1240 unsigned int modes; /* mode selector */
1241 long offset; /* time offset (usec) */
1242 long freq; /* frequency offset (scaled ppm) */
1243 long maxerror; /* maximum error (usec) */
1244 long esterror; /* estimated error (usec) */
1245 int status; /* clock command/status */
1246 long constant; /* pll time constant */
1247 long precision; /* clock precision (usec) (read only) */
1248 long tolerance; /* clock frequency tolerance (ppm)
1249 * (read only)
1250 */
1251 struct timeval32 time; /* (read only) */
1252 long tick; /* (modified) usecs between clock ticks */
1253
1254 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1255 long jitter; /* pps jitter (us) (ro) */
1256 int shift; /* interval duration (s) (shift) (ro) */
1257 long stabil; /* pps stability (scaled ppm) (ro) */
1258 long jitcnt; /* jitter limit exceeded (ro) */
1259 long calcnt; /* calibration intervals (ro) */
1260 long errcnt; /* calibration errors (ro) */
1261 long stbcnt; /* stability limit exceeded (ro) */
1262
1263 int :32; int :32; int :32; int :32;
1264 int :32; int :32; int :32; int :32;
1265 int :32; int :32; int :32; int :32;
1266 };
1267
1268 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1269 {
1270 struct timex txc;
1271 int ret;
1272
1273 /* copy relevant bits of struct timex. */
1274 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1275 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1276 offsetof(struct timex32, time)))
1277 return -EFAULT;
1278
1279 ret = do_adjtimex(&txc);
1280 if (ret < 0)
1281 return ret;
1282
1283 /* copy back to timex32 */
1284 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1285 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1286 offsetof(struct timex32, tick))) ||
1287 (put_tv32(&txc_p->time, &txc.time)))
1288 return -EFAULT;
1289
1290 return ret;
1291 }
1292
1293 /* Get an address range which is currently unmapped. Similar to the
1294 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1295
1296 static unsigned long
1297 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1298 unsigned long limit)
1299 {
1300 struct vm_unmapped_area_info info;
1301
1302 info.flags = 0;
1303 info.length = len;
1304 info.low_limit = addr;
1305 info.high_limit = limit;
1306 info.align_mask = 0;
1307 info.align_offset = 0;
1308 return vm_unmapped_area(&info);
1309 }
1310
1311 unsigned long
1312 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1313 unsigned long len, unsigned long pgoff,
1314 unsigned long flags)
1315 {
1316 unsigned long limit;
1317
1318 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1319 if (current->personality & ADDR_LIMIT_32BIT)
1320 limit = 0x80000000;
1321 else
1322 limit = TASK_SIZE;
1323
1324 if (len > limit)
1325 return -ENOMEM;
1326
1327 if (flags & MAP_FIXED)
1328 return addr;
1329
1330 /* First, see if the given suggestion fits.
1331
1332 The OSF/1 loader (/sbin/loader) relies on us returning an
1333 address larger than the requested if one exists, which is
1334 a terribly broken way to program.
1335
1336 That said, I can see the use in being able to suggest not
1337 merely specific addresses, but regions of memory -- perhaps
1338 this feature should be incorporated into all ports? */
1339
1340 if (addr) {
1341 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1342 if (addr != (unsigned long) -ENOMEM)
1343 return addr;
1344 }
1345
1346 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1347 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1348 len, limit);
1349 if (addr != (unsigned long) -ENOMEM)
1350 return addr;
1351
1352 /* Finally, try allocating in low memory. */
1353 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1354
1355 return addr;
1356 }
1357
1358 #ifdef CONFIG_OSF4_COMPAT
1359
1360 /* Clear top 32 bits of iov_len in the user's buffer for
1361 compatibility with old versions of OSF/1 where iov_len
1362 was defined as int. */
1363 static int
1364 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1365 {
1366 unsigned long i;
1367
1368 for (i = 0 ; i < count ; i++) {
1369 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1370
1371 if (put_user(0, iov_len_high))
1372 return -EFAULT;
1373 }
1374 return 0;
1375 }
1376
1377 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1378 const struct iovec __user *, vector, unsigned long, count)
1379 {
1380 if (unlikely(personality(current->personality) == PER_OSF4))
1381 if (osf_fix_iov_len(vector, count))
1382 return -EFAULT;
1383 return sys_readv(fd, vector, count);
1384 }
1385
1386 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1387 const struct iovec __user *, vector, unsigned long, count)
1388 {
1389 if (unlikely(personality(current->personality) == PER_OSF4))
1390 if (osf_fix_iov_len(vector, count))
1391 return -EFAULT;
1392 return sys_writev(fd, vector, count);
1393 }
1394
1395 #endif
1396
1397 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1398 {
1399 int prio = sys_getpriority(which, who);
1400 if (prio >= 0) {
1401 /* Return value is the unbiased priority, i.e. 20 - prio.
1402 This does result in negative return values, so signal
1403 no error */
1404 force_successful_syscall_return();
1405 prio = 20 - prio;
1406 }
1407 return prio;
1408 }
1409
1410 SYSCALL_DEFINE0(getxuid)
1411 {
1412 current_pt_regs()->r20 = sys_geteuid();
1413 return sys_getuid();
1414 }
1415
1416 SYSCALL_DEFINE0(getxgid)
1417 {
1418 current_pt_regs()->r20 = sys_getegid();
1419 return sys_getgid();
1420 }
1421
1422 SYSCALL_DEFINE0(getxpid)
1423 {
1424 current_pt_regs()->r20 = sys_getppid();
1425 return sys_getpid();
1426 }
1427
1428 SYSCALL_DEFINE0(alpha_pipe)
1429 {
1430 int fd[2];
1431 int res = do_pipe_flags(fd, 0);
1432 if (!res) {
1433 /* The return values are in $0 and $20. */
1434 current_pt_regs()->r20 = fd[1];
1435 res = fd[0];
1436 }
1437 return res;
1438 }
1439
1440 SYSCALL_DEFINE1(sethae, unsigned long, val)
1441 {
1442 current_pt_regs()->hae = val;
1443 return 0;
1444 }
Linux with added FPC-III support