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Merge branch 'for-3.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
[linux/fpc-iii.git] / arch / alpha / kernel / osf_sys.c
blobdbc1760f418b4c26914a0bd6a05456d112f76d8b
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 fd arg = fdget(fd);
149 struct osf_dirent_callback buf;
150
151 if (!arg.file)
152 return -EBADF;
153
154 buf.dirent = dirent;
155 buf.basep = basep;
156 buf.count = count;
157 buf.error = 0;
158
159 error = vfs_readdir(arg.file, osf_filldir, &buf);
160 if (error >= 0)
161 error = buf.error;
162 if (count != buf.count)
163 error = count - buf.count;
164
165 fdput(arg);
166 return error;
167 }
168
169 #undef NAME_OFFSET
170
171 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
172 unsigned long, prot, unsigned long, flags, unsigned long, fd,
173 unsigned long, off)
174 {
175 unsigned long ret = -EINVAL;
176
177 #if 0
178 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
179 printk("%s: unimplemented OSF mmap flags %04lx\n",
180 current->comm, flags);
181 #endif
182 if ((off + PAGE_ALIGN(len)) < off)
183 goto out;
184 if (off & ~PAGE_MASK)
185 goto out;
186 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
187 out:
188 return ret;
189 }
190
191 struct osf_stat {
192 int st_dev;
193 int st_pad1;
194 unsigned st_mode;
195 unsigned short st_nlink;
196 short st_nlink_reserved;
197 unsigned st_uid;
198 unsigned st_gid;
199 int st_rdev;
200 int st_ldev;
201 long st_size;
202 int st_pad2;
203 int st_uatime;
204 int st_pad3;
205 int st_umtime;
206 int st_pad4;
207 int st_uctime;
208 int st_pad5;
209 int st_pad6;
210 unsigned st_flags;
211 unsigned st_gen;
212 long st_spare[4];
213 unsigned st_ino;
214 int st_ino_reserved;
215 int st_atime;
216 int st_atime_reserved;
217 int st_mtime;
218 int st_mtime_reserved;
219 int st_ctime;
220 int st_ctime_reserved;
221 long st_blksize;
222 long st_blocks;
223 };
224
225 /*
226 * The OSF/1 statfs structure is much larger, but this should
227 * match the beginning, at least.
228 */
229 struct osf_statfs {
230 short f_type;
231 short f_flags;
232 int f_fsize;
233 int f_bsize;
234 int f_blocks;
235 int f_bfree;
236 int f_bavail;
237 int f_files;
238 int f_ffree;
239 __kernel_fsid_t f_fsid;
240 };
241
242 struct osf_statfs64 {
243 short f_type;
244 short f_flags;
245 int f_pad1;
246 int f_pad2;
247 int f_pad3;
248 int f_pad4;
249 int f_pad5;
250 int f_pad6;
251 int f_pad7;
252 __kernel_fsid_t f_fsid;
253 u_short f_namemax;
254 short f_reserved1;
255 int f_spare[8];
256 char f_pad8[90];
257 char f_pad9[90];
258 long mount_info[10];
259 u_long f_flags2;
260 long f_spare2[14];
261 long f_fsize;
262 long f_bsize;
263 long f_blocks;
264 long f_bfree;
265 long f_bavail;
266 long f_files;
267 long f_ffree;
268 };
269
270 static int
271 linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat)
272 {
273 struct osf_stat tmp = { 0 };
274
275 tmp.st_dev = lstat->dev;
276 tmp.st_mode = lstat->mode;
277 tmp.st_nlink = lstat->nlink;
278 tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid);
279 tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid);
280 tmp.st_rdev = lstat->rdev;
281 tmp.st_ldev = lstat->rdev;
282 tmp.st_size = lstat->size;
283 tmp.st_uatime = lstat->atime.tv_nsec / 1000;
284 tmp.st_umtime = lstat->mtime.tv_nsec / 1000;
285 tmp.st_uctime = lstat->ctime.tv_nsec / 1000;
286 tmp.st_ino = lstat->ino;
287 tmp.st_atime = lstat->atime.tv_sec;
288 tmp.st_mtime = lstat->mtime.tv_sec;
289 tmp.st_ctime = lstat->ctime.tv_sec;
290 tmp.st_blksize = lstat->blksize;
291 tmp.st_blocks = lstat->blocks;
292
293 return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0;
294 }
295
296 static int
297 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
298 unsigned long bufsiz)
299 {
300 struct osf_statfs tmp_stat;
301
302 tmp_stat.f_type = linux_stat->f_type;
303 tmp_stat.f_flags = 0; /* mount flags */
304 tmp_stat.f_fsize = linux_stat->f_frsize;
305 tmp_stat.f_bsize = linux_stat->f_bsize;
306 tmp_stat.f_blocks = linux_stat->f_blocks;
307 tmp_stat.f_bfree = linux_stat->f_bfree;
308 tmp_stat.f_bavail = linux_stat->f_bavail;
309 tmp_stat.f_files = linux_stat->f_files;
310 tmp_stat.f_ffree = linux_stat->f_ffree;
311 tmp_stat.f_fsid = linux_stat->f_fsid;
312 if (bufsiz > sizeof(tmp_stat))
313 bufsiz = sizeof(tmp_stat);
314 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
315 }
316
317 static int
318 linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat,
319 unsigned long bufsiz)
320 {
321 struct osf_statfs64 tmp_stat = { 0 };
322
323 tmp_stat.f_type = linux_stat->f_type;
324 tmp_stat.f_fsize = linux_stat->f_frsize;
325 tmp_stat.f_bsize = linux_stat->f_bsize;
326 tmp_stat.f_blocks = linux_stat->f_blocks;
327 tmp_stat.f_bfree = linux_stat->f_bfree;
328 tmp_stat.f_bavail = linux_stat->f_bavail;
329 tmp_stat.f_files = linux_stat->f_files;
330 tmp_stat.f_ffree = linux_stat->f_ffree;
331 tmp_stat.f_fsid = linux_stat->f_fsid;
332 if (bufsiz > sizeof(tmp_stat))
333 bufsiz = sizeof(tmp_stat);
334 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
335 }
336
337 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
338 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
339 {
340 struct kstatfs linux_stat;
341 int error = user_statfs(pathname, &linux_stat);
342 if (!error)
343 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
344 return error;
345 }
346
347 SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
348 {
349 struct kstat stat;
350 int error;
351
352 error = vfs_stat(name, &stat);
353 if (error)
354 return error;
355
356 return linux_to_osf_stat(&stat, buf);
357 }
358
359 SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf)
360 {
361 struct kstat stat;
362 int error;
363
364 error = vfs_lstat(name, &stat);
365 if (error)
366 return error;
367
368 return linux_to_osf_stat(&stat, buf);
369 }
370
371 SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf)
372 {
373 struct kstat stat;
374 int error;
375
376 error = vfs_fstat(fd, &stat);
377 if (error)
378 return error;
379
380 return linux_to_osf_stat(&stat, buf);
381 }
382
383 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
384 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
385 {
386 struct kstatfs linux_stat;
387 int error = fd_statfs(fd, &linux_stat);
388 if (!error)
389 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
390 return error;
391 }
392
393 SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname,
394 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
395 {
396 struct kstatfs linux_stat;
397 int error = user_statfs(pathname, &linux_stat);
398 if (!error)
399 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
400 return error;
401 }
402
403 SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd,
404 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
405 {
406 struct kstatfs linux_stat;
407 int error = fd_statfs(fd, &linux_stat);
408 if (!error)
409 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
410 return error;
411 }
412
413 /*
414 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
415 *
416 * Although to be frank, neither are the native Linux/i386 ones..
417 */
418 struct ufs_args {
419 char __user *devname;
420 int flags;
421 uid_t exroot;
422 };
423
424 struct cdfs_args {
425 char __user *devname;
426 int flags;
427 uid_t exroot;
428
429 /* This has lots more here, which Linux handles with the option block
430 but I'm too lazy to do the translation into ASCII. */
431 };
432
433 struct procfs_args {
434 char __user *devname;
435 int flags;
436 uid_t exroot;
437 };
438
439 /*
440 * We can't actually handle ufs yet, so we translate UFS mounts to
441 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
442 * layout is so braindead it's a major headache doing it.
443 *
444 * Just how long ago was it written? OTOH our UFS driver may be still
445 * unhappy with OSF UFS. [CHECKME]
446 */
447 static int
448 osf_ufs_mount(const char *dirname, struct ufs_args __user *args, int flags)
449 {
450 int retval;
451 struct cdfs_args tmp;
452 struct filename *devname;
453
454 retval = -EFAULT;
455 if (copy_from_user(&tmp, args, sizeof(tmp)))
456 goto out;
457 devname = getname(tmp.devname);
458 retval = PTR_ERR(devname);
459 if (IS_ERR(devname))
460 goto out;
461 retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
462 putname(devname);
463 out:
464 return retval;
465 }
466
467 static int
468 osf_cdfs_mount(const char *dirname, struct cdfs_args __user *args, int flags)
469 {
470 int retval;
471 struct cdfs_args tmp;
472 struct filename *devname;
473
474 retval = -EFAULT;
475 if (copy_from_user(&tmp, args, sizeof(tmp)))
476 goto out;
477 devname = getname(tmp.devname);
478 retval = PTR_ERR(devname);
479 if (IS_ERR(devname))
480 goto out;
481 retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
482 putname(devname);
483 out:
484 return retval;
485 }
486
487 static int
488 osf_procfs_mount(const char *dirname, struct procfs_args __user *args, int flags)
489 {
490 struct procfs_args tmp;
491
492 if (copy_from_user(&tmp, args, sizeof(tmp)))
493 return -EFAULT;
494
495 return do_mount("", dirname, "proc", flags, NULL);
496 }
497
498 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
499 int, flag, void __user *, data)
500 {
501 int retval;
502 struct filename *name;
503
504 name = getname(path);
505 retval = PTR_ERR(name);
506 if (IS_ERR(name))
507 goto out;
508 switch (typenr) {
509 case 1:
510 retval = osf_ufs_mount(name->name, data, flag);
511 break;
512 case 6:
513 retval = osf_cdfs_mount(name->name, data, flag);
514 break;
515 case 9:
516 retval = osf_procfs_mount(name->name, data, flag);
517 break;
518 default:
519 retval = -EINVAL;
520 printk("osf_mount(%ld, %x)\n", typenr, flag);
521 }
522 putname(name);
523 out:
524 return retval;
525 }
526
527 SYSCALL_DEFINE1(osf_utsname, char __user *, name)
528 {
529 int error;
530
531 down_read(&uts_sem);
532 error = -EFAULT;
533 if (copy_to_user(name + 0, utsname()->sysname, 32))
534 goto out;
535 if (copy_to_user(name + 32, utsname()->nodename, 32))
536 goto out;
537 if (copy_to_user(name + 64, utsname()->release, 32))
538 goto out;
539 if (copy_to_user(name + 96, utsname()->version, 32))
540 goto out;
541 if (copy_to_user(name + 128, utsname()->machine, 32))
542 goto out;
543
544 error = 0;
545 out:
546 up_read(&uts_sem);
547 return error;
548 }
549
550 SYSCALL_DEFINE0(getpagesize)
551 {
552 return PAGE_SIZE;
553 }
554
555 SYSCALL_DEFINE0(getdtablesize)
556 {
557 return sysctl_nr_open;
558 }
559
560 /*
561 * For compatibility with OSF/1 only. Use utsname(2) instead.
562 */
563 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
564 {
565 unsigned len;
566 int i;
567
568 if (!access_ok(VERIFY_WRITE, name, namelen))
569 return -EFAULT;
570
571 len = namelen;
572 if (len > 32)
573 len = 32;
574
575 down_read(&uts_sem);
576 for (i = 0; i < len; ++i) {
577 __put_user(utsname()->domainname[i], name + i);
578 if (utsname()->domainname[i] == '\0')
579 break;
580 }
581 up_read(&uts_sem);
582
583 return 0;
584 }
585
586 /*
587 * The following stuff should move into a header file should it ever
588 * be labeled "officially supported." Right now, there is just enough
589 * support to avoid applications (such as tar) printing error
590 * messages. The attributes are not really implemented.
591 */
592
593 /*
594 * Values for Property list entry flag
595 */
596 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
597 by default */
598 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
599 #define PLE_FLAG_ALL -1 /* All flag value */
600
601 struct proplistname_args {
602 unsigned int pl_mask;
603 unsigned int pl_numnames;
604 char **pl_names;
605 };
606
607 union pl_args {
608 struct setargs {
609 char __user *path;
610 long follow;
611 long nbytes;
612 char __user *buf;
613 } set;
614 struct fsetargs {
615 long fd;
616 long nbytes;
617 char __user *buf;
618 } fset;
619 struct getargs {
620 char __user *path;
621 long follow;
622 struct proplistname_args __user *name_args;
623 long nbytes;
624 char __user *buf;
625 int __user *min_buf_size;
626 } get;
627 struct fgetargs {
628 long fd;
629 struct proplistname_args __user *name_args;
630 long nbytes;
631 char __user *buf;
632 int __user *min_buf_size;
633 } fget;
634 struct delargs {
635 char __user *path;
636 long follow;
637 struct proplistname_args __user *name_args;
638 } del;
639 struct fdelargs {
640 long fd;
641 struct proplistname_args __user *name_args;
642 } fdel;
643 };
644
645 enum pl_code {
646 PL_SET = 1, PL_FSET = 2,
647 PL_GET = 3, PL_FGET = 4,
648 PL_DEL = 5, PL_FDEL = 6
649 };
650
651 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
652 union pl_args __user *, args)
653 {
654 long error;
655 int __user *min_buf_size_ptr;
656
657 switch (code) {
658 case PL_SET:
659 if (get_user(error, &args->set.nbytes))
660 error = -EFAULT;
661 break;
662 case PL_FSET:
663 if (get_user(error, &args->fset.nbytes))
664 error = -EFAULT;
665 break;
666 case PL_GET:
667 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
668 if (error)
669 break;
670 error = put_user(0, min_buf_size_ptr);
671 break;
672 case PL_FGET:
673 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
674 if (error)
675 break;
676 error = put_user(0, min_buf_size_ptr);
677 break;
678 case PL_DEL:
679 case PL_FDEL:
680 error = 0;
681 break;
682 default:
683 error = -EOPNOTSUPP;
684 break;
685 };
686 return error;
687 }
688
689 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
690 struct sigstack __user *, uoss)
691 {
692 unsigned long usp = rdusp();
693 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
694 unsigned long oss_os = on_sig_stack(usp);
695 int error;
696
697 if (uss) {
698 void __user *ss_sp;
699
700 error = -EFAULT;
701 if (get_user(ss_sp, &uss->ss_sp))
702 goto out;
703
704 /* If the current stack was set with sigaltstack, don't
705 swap stacks while we are on it. */
706 error = -EPERM;
707 if (current->sas_ss_sp && on_sig_stack(usp))
708 goto out;
709
710 /* Since we don't know the extent of the stack, and we don't
711 track onstack-ness, but rather calculate it, we must
712 presume a size. Ho hum this interface is lossy. */
713 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
714 current->sas_ss_size = SIGSTKSZ;
715 }
716
717 if (uoss) {
718 error = -EFAULT;
719 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
720 || __put_user(oss_sp, &uoss->ss_sp)
721 || __put_user(oss_os, &uoss->ss_onstack))
722 goto out;
723 }
724
725 error = 0;
726 out:
727 return error;
728 }
729
730 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
731 {
732 const char *sysinfo_table[] = {
733 utsname()->sysname,
734 utsname()->nodename,
735 utsname()->release,
736 utsname()->version,
737 utsname()->machine,
738 "alpha", /* instruction set architecture */
739 "dummy", /* hardware serial number */
740 "dummy", /* hardware manufacturer */
741 "dummy", /* secure RPC domain */
742 };
743 unsigned long offset;
744 const char *res;
745 long len, err = -EINVAL;
746
747 offset = command-1;
748 if (offset >= ARRAY_SIZE(sysinfo_table)) {
749 /* Digital UNIX has a few unpublished interfaces here */
750 printk("sysinfo(%d)", command);
751 goto out;
752 }
753
754 down_read(&uts_sem);
755 res = sysinfo_table[offset];
756 len = strlen(res)+1;
757 if ((unsigned long)len > (unsigned long)count)
758 len = count;
759 if (copy_to_user(buf, res, len))
760 err = -EFAULT;
761 else
762 err = 0;
763 up_read(&uts_sem);
764 out:
765 return err;
766 }
767
768 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
769 unsigned long, nbytes, int __user *, start, void __user *, arg)
770 {
771 unsigned long w;
772 struct percpu_struct *cpu;
773
774 switch (op) {
775 case GSI_IEEE_FP_CONTROL:
776 /* Return current software fp control & status bits. */
777 /* Note that DU doesn't verify available space here. */
778
779 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
780 w = swcr_update_status(w, rdfpcr());
781 if (put_user(w, (unsigned long __user *) buffer))
782 return -EFAULT;
783 return 0;
784
785 case GSI_IEEE_STATE_AT_SIGNAL:
786 /*
787 * Not sure anybody will ever use this weird stuff. These
788 * ops can be used (under OSF/1) to set the fpcr that should
789 * be used when a signal handler starts executing.
790 */
791 break;
792
793 case GSI_UACPROC:
794 if (nbytes < sizeof(unsigned int))
795 return -EINVAL;
796 w = current_thread_info()->status & UAC_BITMASK;
797 if (put_user(w, (unsigned int __user *)buffer))
798 return -EFAULT;
799 return 1;
800
801 case GSI_PROC_TYPE:
802 if (nbytes < sizeof(unsigned long))
803 return -EINVAL;
804 cpu = (struct percpu_struct*)
805 ((char*)hwrpb + hwrpb->processor_offset);
806 w = cpu->type;
807 if (put_user(w, (unsigned long __user*)buffer))
808 return -EFAULT;
809 return 1;
810
811 case GSI_GET_HWRPB:
812 if (nbytes > sizeof(*hwrpb))
813 return -EINVAL;
814 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
815 return -EFAULT;
816 return 1;
817
818 default:
819 break;
820 }
821
822 return -EOPNOTSUPP;
823 }
824
825 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
826 unsigned long, nbytes, int __user *, start, void __user *, arg)
827 {
828 switch (op) {
829 case SSI_IEEE_FP_CONTROL: {
830 unsigned long swcr, fpcr;
831 unsigned int *state;
832
833 /*
834 * Alpha Architecture Handbook 4.7.7.3:
835 * To be fully IEEE compiant, we must track the current IEEE
836 * exception state in software, because spurious bits can be
837 * set in the trap shadow of a software-complete insn.
838 */
839
840 if (get_user(swcr, (unsigned long __user *)buffer))
841 return -EFAULT;
842 state = &current_thread_info()->ieee_state;
843
844 /* Update softare trap enable bits. */
845 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
846
847 /* Update the real fpcr. */
848 fpcr = rdfpcr() & FPCR_DYN_MASK;
849 fpcr |= ieee_swcr_to_fpcr(swcr);
850 wrfpcr(fpcr);
851
852 return 0;
853 }
854
855 case SSI_IEEE_RAISE_EXCEPTION: {
856 unsigned long exc, swcr, fpcr, fex;
857 unsigned int *state;
858
859 if (get_user(exc, (unsigned long __user *)buffer))
860 return -EFAULT;
861 state = &current_thread_info()->ieee_state;
862 exc &= IEEE_STATUS_MASK;
863
864 /* Update softare trap enable bits. */
865 swcr = (*state & IEEE_SW_MASK) | exc;
866 *state |= exc;
867
868 /* Update the real fpcr. */
869 fpcr = rdfpcr();
870 fpcr |= ieee_swcr_to_fpcr(swcr);
871 wrfpcr(fpcr);
872
873 /* If any exceptions set by this call, and are unmasked,
874 send a signal. Old exceptions are not signaled. */
875 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
876 if (fex) {
877 siginfo_t info;
878 int si_code = 0;
879
880 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
881 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
882 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
883 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
884 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
885 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
886
887 info.si_signo = SIGFPE;
888 info.si_errno = 0;
889 info.si_code = si_code;
890 info.si_addr = NULL; /* FIXME */
891 send_sig_info(SIGFPE, &info, current);
892 }
893 return 0;
894 }
895
896 case SSI_IEEE_STATE_AT_SIGNAL:
897 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
898 /*
899 * Not sure anybody will ever use this weird stuff. These
900 * ops can be used (under OSF/1) to set the fpcr that should
901 * be used when a signal handler starts executing.
902 */
903 break;
904
905 case SSI_NVPAIRS: {
906 unsigned __user *p = buffer;
907 unsigned i;
908
909 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
910 unsigned v, w, status;
911
912 if (get_user(v, p) || get_user(w, p + 1))
913 return -EFAULT;
914 switch (v) {
915 case SSIN_UACPROC:
916 w &= UAC_BITMASK;
917 status = current_thread_info()->status;
918 status = (status & ~UAC_BITMASK) | w;
919 current_thread_info()->status = status;
920 break;
921
922 default:
923 return -EOPNOTSUPP;
924 }
925 }
926 return 0;
927 }
928
929 case SSI_LMF:
930 return 0;
931
932 default:
933 break;
934 }
935
936 return -EOPNOTSUPP;
937 }
938
939 /* Translations due to the fact that OSF's time_t is an int. Which
940 affects all sorts of things, like timeval and itimerval. */
941
942 extern struct timezone sys_tz;
943
944 struct timeval32
945 {
946 int tv_sec, tv_usec;
947 };
948
949 struct itimerval32
950 {
951 struct timeval32 it_interval;
952 struct timeval32 it_value;
953 };
954
955 static inline long
956 get_tv32(struct timeval *o, struct timeval32 __user *i)
957 {
958 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
959 (__get_user(o->tv_sec, &i->tv_sec) |
960 __get_user(o->tv_usec, &i->tv_usec)));
961 }
962
963 static inline long
964 put_tv32(struct timeval32 __user *o, struct timeval *i)
965 {
966 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
967 (__put_user(i->tv_sec, &o->tv_sec) |
968 __put_user(i->tv_usec, &o->tv_usec)));
969 }
970
971 static inline long
972 get_it32(struct itimerval *o, struct itimerval32 __user *i)
973 {
974 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
975 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
976 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
977 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
978 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
979 }
980
981 static inline long
982 put_it32(struct itimerval32 __user *o, struct itimerval *i)
983 {
984 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
985 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
986 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
987 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
988 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
989 }
990
991 static inline void
992 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
993 {
994 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
995 value->tv_sec = jiffies / HZ;
996 }
997
998 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
999 struct timezone __user *, tz)
1000 {
1001 if (tv) {
1002 struct timeval ktv;
1003 do_gettimeofday(&ktv);
1004 if (put_tv32(tv, &ktv))
1005 return -EFAULT;
1006 }
1007 if (tz) {
1008 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
1009 return -EFAULT;
1010 }
1011 return 0;
1012 }
1013
1014 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
1015 struct timezone __user *, tz)
1016 {
1017 struct timespec kts;
1018 struct timezone ktz;
1019
1020 if (tv) {
1021 if (get_tv32((struct timeval *)&kts, tv))
1022 return -EFAULT;
1023 }
1024 if (tz) {
1025 if (copy_from_user(&ktz, tz, sizeof(*tz)))
1026 return -EFAULT;
1027 }
1028
1029 kts.tv_nsec *= 1000;
1030
1031 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
1032 }
1033
1034 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
1035 {
1036 struct itimerval kit;
1037 int error;
1038
1039 error = do_getitimer(which, &kit);
1040 if (!error && put_it32(it, &kit))
1041 error = -EFAULT;
1042
1043 return error;
1044 }
1045
1046 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
1047 struct itimerval32 __user *, out)
1048 {
1049 struct itimerval kin, kout;
1050 int error;
1051
1052 if (in) {
1053 if (get_it32(&kin, in))
1054 return -EFAULT;
1055 } else
1056 memset(&kin, 0, sizeof(kin));
1057
1058 error = do_setitimer(which, &kin, out ? &kout : NULL);
1059 if (error || !out)
1060 return error;
1061
1062 if (put_it32(out, &kout))
1063 return -EFAULT;
1064
1065 return 0;
1066
1067 }
1068
1069 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1070 struct timeval32 __user *, tvs)
1071 {
1072 struct timespec tv[2];
1073
1074 if (tvs) {
1075 struct timeval ktvs[2];
1076 if (get_tv32(&ktvs[0], &tvs[0]) ||
1077 get_tv32(&ktvs[1], &tvs[1]))
1078 return -EFAULT;
1079
1080 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
1081 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
1082 return -EINVAL;
1083
1084 tv[0].tv_sec = ktvs[0].tv_sec;
1085 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
1086 tv[1].tv_sec = ktvs[1].tv_sec;
1087 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
1088 }
1089
1090 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1091 }
1092
1093 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1094 fd_set __user *, exp, struct timeval32 __user *, tvp)
1095 {
1096 struct timespec end_time, *to = NULL;
1097 if (tvp) {
1098 time_t sec, usec;
1099
1100 to = &end_time;
1101
1102 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
1103 || __get_user(sec, &tvp->tv_sec)
1104 || __get_user(usec, &tvp->tv_usec)) {
1105 return -EFAULT;
1106 }
1107
1108 if (sec < 0 || usec < 0)
1109 return -EINVAL;
1110
1111 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC))
1112 return -EINVAL;
1113
1114 }
1115
1116 /* OSF does not copy back the remaining time. */
1117 return core_sys_select(n, inp, outp, exp, to);
1118 }
1119
1120 struct rusage32 {
1121 struct timeval32 ru_utime; /* user time used */
1122 struct timeval32 ru_stime; /* system time used */
1123 long ru_maxrss; /* maximum resident set size */
1124 long ru_ixrss; /* integral shared memory size */
1125 long ru_idrss; /* integral unshared data size */
1126 long ru_isrss; /* integral unshared stack size */
1127 long ru_minflt; /* page reclaims */
1128 long ru_majflt; /* page faults */
1129 long ru_nswap; /* swaps */
1130 long ru_inblock; /* block input operations */
1131 long ru_oublock; /* block output operations */
1132 long ru_msgsnd; /* messages sent */
1133 long ru_msgrcv; /* messages received */
1134 long ru_nsignals; /* signals received */
1135 long ru_nvcsw; /* voluntary context switches */
1136 long ru_nivcsw; /* involuntary " */
1137 };
1138
1139 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1140 {
1141 struct rusage32 r;
1142 cputime_t utime, stime;
1143
1144 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1145 return -EINVAL;
1146
1147 memset(&r, 0, sizeof(r));
1148 switch (who) {
1149 case RUSAGE_SELF:
1150 task_cputime(current, &utime, &stime);
1151 jiffies_to_timeval32(utime, &r.ru_utime);
1152 jiffies_to_timeval32(stime, &r.ru_stime);
1153 r.ru_minflt = current->min_flt;
1154 r.ru_majflt = current->maj_flt;
1155 break;
1156 case RUSAGE_CHILDREN:
1157 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1158 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1159 r.ru_minflt = current->signal->cmin_flt;
1160 r.ru_majflt = current->signal->cmaj_flt;
1161 break;
1162 }
1163
1164 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1165 }
1166
1167 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1168 struct rusage32 __user *, ur)
1169 {
1170 struct rusage r;
1171 long ret, err;
1172 unsigned int status = 0;
1173 mm_segment_t old_fs;
1174
1175 if (!ur)
1176 return sys_wait4(pid, ustatus, options, NULL);
1177
1178 old_fs = get_fs();
1179
1180 set_fs (KERNEL_DS);
1181 ret = sys_wait4(pid, (unsigned int __user *) &status, options,
1182 (struct rusage __user *) &r);
1183 set_fs (old_fs);
1184
1185 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1186 return -EFAULT;
1187
1188 err = 0;
1189 err |= put_user(status, ustatus);
1190 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1191 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1192 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1193 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1194 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1195 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1196 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1197 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1198 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1199 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1200 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1201 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1202 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1203 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1204 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1205 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1206 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1207 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1208
1209 return err ? err : ret;
1210 }
1211
1212 /*
1213 * I don't know what the parameters are: the first one
1214 * seems to be a timeval pointer, and I suspect the second
1215 * one is the time remaining.. Ho humm.. No documentation.
1216 */
1217 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1218 struct timeval32 __user *, remain)
1219 {
1220 struct timeval tmp;
1221 unsigned long ticks;
1222
1223 if (get_tv32(&tmp, sleep))
1224 goto fault;
1225
1226 ticks = timeval_to_jiffies(&tmp);
1227
1228 ticks = schedule_timeout_interruptible(ticks);
1229
1230 if (remain) {
1231 jiffies_to_timeval(ticks, &tmp);
1232 if (put_tv32(remain, &tmp))
1233 goto fault;
1234 }
1235
1236 return 0;
1237 fault:
1238 return -EFAULT;
1239 }
1240
1241
1242 struct timex32 {
1243 unsigned int modes; /* mode selector */
1244 long offset; /* time offset (usec) */
1245 long freq; /* frequency offset (scaled ppm) */
1246 long maxerror; /* maximum error (usec) */
1247 long esterror; /* estimated error (usec) */
1248 int status; /* clock command/status */
1249 long constant; /* pll time constant */
1250 long precision; /* clock precision (usec) (read only) */
1251 long tolerance; /* clock frequency tolerance (ppm)
1252 * (read only)
1253 */
1254 struct timeval32 time; /* (read only) */
1255 long tick; /* (modified) usecs between clock ticks */
1256
1257 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1258 long jitter; /* pps jitter (us) (ro) */
1259 int shift; /* interval duration (s) (shift) (ro) */
1260 long stabil; /* pps stability (scaled ppm) (ro) */
1261 long jitcnt; /* jitter limit exceeded (ro) */
1262 long calcnt; /* calibration intervals (ro) */
1263 long errcnt; /* calibration errors (ro) */
1264 long stbcnt; /* stability limit exceeded (ro) */
1265
1266 int :32; int :32; int :32; int :32;
1267 int :32; int :32; int :32; int :32;
1268 int :32; int :32; int :32; int :32;
1269 };
1270
1271 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1272 {
1273 struct timex txc;
1274 int ret;
1275
1276 /* copy relevant bits of struct timex. */
1277 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1278 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1279 offsetof(struct timex32, time)))
1280 return -EFAULT;
1281
1282 ret = do_adjtimex(&txc);
1283 if (ret < 0)
1284 return ret;
1285
1286 /* copy back to timex32 */
1287 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1288 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1289 offsetof(struct timex32, tick))) ||
1290 (put_tv32(&txc_p->time, &txc.time)))
1291 return -EFAULT;
1292
1293 return ret;
1294 }
1295
1296 /* Get an address range which is currently unmapped. Similar to the
1297 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1298
1299 static unsigned long
1300 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1301 unsigned long limit)
1302 {
1303 struct vm_area_struct *vma = find_vma(current->mm, addr);
1304
1305 while (1) {
1306 /* At this point: (!vma || addr < vma->vm_end). */
1307 if (limit - len < addr)
1308 return -ENOMEM;
1309 if (!vma || addr + len <= vma->vm_start)
1310 return addr;
1311 addr = vma->vm_end;
1312 vma = vma->vm_next;
1313 }
1314 }
1315
1316 unsigned long
1317 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1318 unsigned long len, unsigned long pgoff,
1319 unsigned long flags)
1320 {
1321 unsigned long limit;
1322
1323 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1324 if (current->personality & ADDR_LIMIT_32BIT)
1325 limit = 0x80000000;
1326 else
1327 limit = TASK_SIZE;
1328
1329 if (len > limit)
1330 return -ENOMEM;
1331
1332 if (flags & MAP_FIXED)
1333 return addr;
1334
1335 /* First, see if the given suggestion fits.
1336
1337 The OSF/1 loader (/sbin/loader) relies on us returning an
1338 address larger than the requested if one exists, which is
1339 a terribly broken way to program.
1340
1341 That said, I can see the use in being able to suggest not
1342 merely specific addresses, but regions of memory -- perhaps
1343 this feature should be incorporated into all ports? */
1344
1345 if (addr) {
1346 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1347 if (addr != (unsigned long) -ENOMEM)
1348 return addr;
1349 }
1350
1351 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1352 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1353 len, limit);
1354 if (addr != (unsigned long) -ENOMEM)
1355 return addr;
1356
1357 /* Finally, try allocating in low memory. */
1358 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1359
1360 return addr;
1361 }
1362
1363 #ifdef CONFIG_OSF4_COMPAT
1364
1365 /* Clear top 32 bits of iov_len in the user's buffer for
1366 compatibility with old versions of OSF/1 where iov_len
1367 was defined as int. */
1368 static int
1369 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1370 {
1371 unsigned long i;
1372
1373 for (i = 0 ; i < count ; i++) {
1374 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1375
1376 if (put_user(0, iov_len_high))
1377 return -EFAULT;
1378 }
1379 return 0;
1380 }
1381
1382 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1383 const struct iovec __user *, vector, unsigned long, count)
1384 {
1385 if (unlikely(personality(current->personality) == PER_OSF4))
1386 if (osf_fix_iov_len(vector, count))
1387 return -EFAULT;
1388 return sys_readv(fd, vector, count);
1389 }
1390
1391 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1392 const struct iovec __user *, vector, unsigned long, count)
1393 {
1394 if (unlikely(personality(current->personality) == PER_OSF4))
1395 if (osf_fix_iov_len(vector, count))
1396 return -EFAULT;
1397 return sys_writev(fd, vector, count);
1398 }
1399
1400 #endif
1401
1402 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1403 {
1404 int prio = sys_getpriority(which, who);
1405 if (prio >= 0) {
1406 /* Return value is the unbiased priority, i.e. 20 - prio.
1407 This does result in negative return values, so signal
1408 no error */
1409 force_successful_syscall_return();
1410 prio = 20 - prio;
1411 }
1412 return prio;
1413 }
1414
1415 SYSCALL_DEFINE0(getxuid)
1416 {
1417 current_pt_regs()->r20 = sys_geteuid();
1418 return sys_getuid();
1419 }
1420
1421 SYSCALL_DEFINE0(getxgid)
1422 {
1423 current_pt_regs()->r20 = sys_getegid();
1424 return sys_getgid();
1425 }
1426
1427 SYSCALL_DEFINE0(getxpid)
1428 {
1429 current_pt_regs()->r20 = sys_getppid();
1430 return sys_getpid();
1431 }
1432
1433 SYSCALL_DEFINE0(alpha_pipe)
1434 {
1435 int fd[2];
1436 int res = do_pipe_flags(fd, 0);
1437 if (!res) {
1438 /* The return values are in $0 and $20. */
1439 current_pt_regs()->r20 = fd[1];
1440 res = fd[0];
1441 }
1442 return res;
1443 }
1444
1445 SYSCALL_DEFINE1(sethae, unsigned long, val)
1446 {
1447 current_pt_regs()->hae = val;
1448 return 0;
1449 }
Linux with added FPC-III support