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give readdir(2)/getdents(2)/etc. uniform exclusion with lseek()
[deliverable/linux.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 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
530 down_read(&uts_sem);
531 error = -EFAULT;
532 if (copy_to_user(name + 0, utsname()->sysname, 32))
533 goto out;
534 if (copy_to_user(name + 32, utsname()->nodename, 32))
535 goto out;
536 if (copy_to_user(name + 64, utsname()->release, 32))
537 goto out;
538 if (copy_to_user(name + 96, utsname()->version, 32))
539 goto out;
540 if (copy_to_user(name + 128, utsname()->machine, 32))
541 goto out;
542
543 error = 0;
544 out:
545 up_read(&uts_sem);
546 return error;
547 }
548
549 SYSCALL_DEFINE0(getpagesize)
550 {
551 return PAGE_SIZE;
552 }
553
554 SYSCALL_DEFINE0(getdtablesize)
555 {
556 return sysctl_nr_open;
557 }
558
559 /*
560 * For compatibility with OSF/1 only. Use utsname(2) instead.
561 */
562 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
563 {
564 unsigned len;
565 int i;
566
567 if (!access_ok(VERIFY_WRITE, name, namelen))
568 return -EFAULT;
569
570 len = namelen;
571 if (len > 32)
572 len = 32;
573
574 down_read(&uts_sem);
575 for (i = 0; i < len; ++i) {
576 __put_user(utsname()->domainname[i], name + i);
577 if (utsname()->domainname[i] == '\0')
578 break;
579 }
580 up_read(&uts_sem);
581
582 return 0;
583 }
584
585 /*
586 * The following stuff should move into a header file should it ever
587 * be labeled "officially supported." Right now, there is just enough
588 * support to avoid applications (such as tar) printing error
589 * messages. The attributes are not really implemented.
590 */
591
592 /*
593 * Values for Property list entry flag
594 */
595 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
596 by default */
597 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
598 #define PLE_FLAG_ALL -1 /* All flag value */
599
600 struct proplistname_args {
601 unsigned int pl_mask;
602 unsigned int pl_numnames;
603 char **pl_names;
604 };
605
606 union pl_args {
607 struct setargs {
608 char __user *path;
609 long follow;
610 long nbytes;
611 char __user *buf;
612 } set;
613 struct fsetargs {
614 long fd;
615 long nbytes;
616 char __user *buf;
617 } fset;
618 struct getargs {
619 char __user *path;
620 long follow;
621 struct proplistname_args __user *name_args;
622 long nbytes;
623 char __user *buf;
624 int __user *min_buf_size;
625 } get;
626 struct fgetargs {
627 long fd;
628 struct proplistname_args __user *name_args;
629 long nbytes;
630 char __user *buf;
631 int __user *min_buf_size;
632 } fget;
633 struct delargs {
634 char __user *path;
635 long follow;
636 struct proplistname_args __user *name_args;
637 } del;
638 struct fdelargs {
639 long fd;
640 struct proplistname_args __user *name_args;
641 } fdel;
642 };
643
644 enum pl_code {
645 PL_SET = 1, PL_FSET = 2,
646 PL_GET = 3, PL_FGET = 4,
647 PL_DEL = 5, PL_FDEL = 6
648 };
649
650 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
651 union pl_args __user *, args)
652 {
653 long error;
654 int __user *min_buf_size_ptr;
655
656 switch (code) {
657 case PL_SET:
658 if (get_user(error, &args->set.nbytes))
659 error = -EFAULT;
660 break;
661 case PL_FSET:
662 if (get_user(error, &args->fset.nbytes))
663 error = -EFAULT;
664 break;
665 case PL_GET:
666 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
667 if (error)
668 break;
669 error = put_user(0, min_buf_size_ptr);
670 break;
671 case PL_FGET:
672 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
673 if (error)
674 break;
675 error = put_user(0, min_buf_size_ptr);
676 break;
677 case PL_DEL:
678 case PL_FDEL:
679 error = 0;
680 break;
681 default:
682 error = -EOPNOTSUPP;
683 break;
684 };
685 return error;
686 }
687
688 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
689 struct sigstack __user *, uoss)
690 {
691 unsigned long usp = rdusp();
692 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
693 unsigned long oss_os = on_sig_stack(usp);
694 int error;
695
696 if (uss) {
697 void __user *ss_sp;
698
699 error = -EFAULT;
700 if (get_user(ss_sp, &uss->ss_sp))
701 goto out;
702
703 /* If the current stack was set with sigaltstack, don't
704 swap stacks while we are on it. */
705 error = -EPERM;
706 if (current->sas_ss_sp && on_sig_stack(usp))
707 goto out;
708
709 /* Since we don't know the extent of the stack, and we don't
710 track onstack-ness, but rather calculate it, we must
711 presume a size. Ho hum this interface is lossy. */
712 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
713 current->sas_ss_size = SIGSTKSZ;
714 }
715
716 if (uoss) {
717 error = -EFAULT;
718 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
719 || __put_user(oss_sp, &uoss->ss_sp)
720 || __put_user(oss_os, &uoss->ss_onstack))
721 goto out;
722 }
723
724 error = 0;
725 out:
726 return error;
727 }
728
729 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
730 {
731 const char *sysinfo_table[] = {
732 utsname()->sysname,
733 utsname()->nodename,
734 utsname()->release,
735 utsname()->version,
736 utsname()->machine,
737 "alpha", /* instruction set architecture */
738 "dummy", /* hardware serial number */
739 "dummy", /* hardware manufacturer */
740 "dummy", /* secure RPC domain */
741 };
742 unsigned long offset;
743 const char *res;
744 long len, err = -EINVAL;
745
746 offset = command-1;
747 if (offset >= ARRAY_SIZE(sysinfo_table)) {
748 /* Digital UNIX has a few unpublished interfaces here */
749 printk("sysinfo(%d)", command);
750 goto out;
751 }
752
753 down_read(&uts_sem);
754 res = sysinfo_table[offset];
755 len = strlen(res)+1;
756 if ((unsigned long)len > (unsigned long)count)
757 len = count;
758 if (copy_to_user(buf, res, len))
759 err = -EFAULT;
760 else
761 err = 0;
762 up_read(&uts_sem);
763 out:
764 return err;
765 }
766
767 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
768 unsigned long, nbytes, int __user *, start, void __user *, arg)
769 {
770 unsigned long w;
771 struct percpu_struct *cpu;
772
773 switch (op) {
774 case GSI_IEEE_FP_CONTROL:
775 /* Return current software fp control & status bits. */
776 /* Note that DU doesn't verify available space here. */
777
778 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
779 w = swcr_update_status(w, rdfpcr());
780 if (put_user(w, (unsigned long __user *) buffer))
781 return -EFAULT;
782 return 0;
783
784 case GSI_IEEE_STATE_AT_SIGNAL:
785 /*
786 * Not sure anybody will ever use this weird stuff. These
787 * ops can be used (under OSF/1) to set the fpcr that should
788 * be used when a signal handler starts executing.
789 */
790 break;
791
792 case GSI_UACPROC:
793 if (nbytes < sizeof(unsigned int))
794 return -EINVAL;
795 w = current_thread_info()->status & UAC_BITMASK;
796 if (put_user(w, (unsigned int __user *)buffer))
797 return -EFAULT;
798 return 1;
799
800 case GSI_PROC_TYPE:
801 if (nbytes < sizeof(unsigned long))
802 return -EINVAL;
803 cpu = (struct percpu_struct*)
804 ((char*)hwrpb + hwrpb->processor_offset);
805 w = cpu->type;
806 if (put_user(w, (unsigned long __user*)buffer))
807 return -EFAULT;
808 return 1;
809
810 case GSI_GET_HWRPB:
811 if (nbytes > sizeof(*hwrpb))
812 return -EINVAL;
813 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
814 return -EFAULT;
815 return 1;
816
817 default:
818 break;
819 }
820
821 return -EOPNOTSUPP;
822 }
823
824 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
825 unsigned long, nbytes, int __user *, start, void __user *, arg)
826 {
827 switch (op) {
828 case SSI_IEEE_FP_CONTROL: {
829 unsigned long swcr, fpcr;
830 unsigned int *state;
831
832 /*
833 * Alpha Architecture Handbook 4.7.7.3:
834 * To be fully IEEE compiant, we must track the current IEEE
835 * exception state in software, because spurious bits can be
836 * set in the trap shadow of a software-complete insn.
837 */
838
839 if (get_user(swcr, (unsigned long __user *)buffer))
840 return -EFAULT;
841 state = &current_thread_info()->ieee_state;
842
843 /* Update softare trap enable bits. */
844 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
845
846 /* Update the real fpcr. */
847 fpcr = rdfpcr() & FPCR_DYN_MASK;
848 fpcr |= ieee_swcr_to_fpcr(swcr);
849 wrfpcr(fpcr);
850
851 return 0;
852 }
853
854 case SSI_IEEE_RAISE_EXCEPTION: {
855 unsigned long exc, swcr, fpcr, fex;
856 unsigned int *state;
857
858 if (get_user(exc, (unsigned long __user *)buffer))
859 return -EFAULT;
860 state = &current_thread_info()->ieee_state;
861 exc &= IEEE_STATUS_MASK;
862
863 /* Update softare trap enable bits. */
864 swcr = (*state & IEEE_SW_MASK) | exc;
865 *state |= exc;
866
867 /* Update the real fpcr. */
868 fpcr = rdfpcr();
869 fpcr |= ieee_swcr_to_fpcr(swcr);
870 wrfpcr(fpcr);
871
872 /* If any exceptions set by this call, and are unmasked,
873 send a signal. Old exceptions are not signaled. */
874 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
875 if (fex) {
876 siginfo_t info;
877 int si_code = 0;
878
879 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
880 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
881 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
882 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
883 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
884 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
885
886 info.si_signo = SIGFPE;
887 info.si_errno = 0;
888 info.si_code = si_code;
889 info.si_addr = NULL; /* FIXME */
890 send_sig_info(SIGFPE, &info, current);
891 }
892 return 0;
893 }
894
895 case SSI_IEEE_STATE_AT_SIGNAL:
896 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
897 /*
898 * Not sure anybody will ever use this weird stuff. These
899 * ops can be used (under OSF/1) to set the fpcr that should
900 * be used when a signal handler starts executing.
901 */
902 break;
903
904 case SSI_NVPAIRS: {
905 unsigned __user *p = buffer;
906 unsigned i;
907
908 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
909 unsigned v, w, status;
910
911 if (get_user(v, p) || get_user(w, p + 1))
912 return -EFAULT;
913 switch (v) {
914 case SSIN_UACPROC:
915 w &= UAC_BITMASK;
916 status = current_thread_info()->status;
917 status = (status & ~UAC_BITMASK) | w;
918 current_thread_info()->status = status;
919 break;
920
921 default:
922 return -EOPNOTSUPP;
923 }
924 }
925 return 0;
926 }
927
928 case SSI_LMF:
929 return 0;
930
931 default:
932 break;
933 }
934
935 return -EOPNOTSUPP;
936 }
937
938 /* Translations due to the fact that OSF's time_t is an int. Which
939 affects all sorts of things, like timeval and itimerval. */
940
941 extern struct timezone sys_tz;
942
943 struct timeval32
944 {
945 int tv_sec, tv_usec;
946 };
947
948 struct itimerval32
949 {
950 struct timeval32 it_interval;
951 struct timeval32 it_value;
952 };
953
954 static inline long
955 get_tv32(struct timeval *o, struct timeval32 __user *i)
956 {
957 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
958 (__get_user(o->tv_sec, &i->tv_sec) |
959 __get_user(o->tv_usec, &i->tv_usec)));
960 }
961
962 static inline long
963 put_tv32(struct timeval32 __user *o, struct timeval *i)
964 {
965 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
966 (__put_user(i->tv_sec, &o->tv_sec) |
967 __put_user(i->tv_usec, &o->tv_usec)));
968 }
969
970 static inline long
971 get_it32(struct itimerval *o, struct itimerval32 __user *i)
972 {
973 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
974 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
975 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
976 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
977 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
978 }
979
980 static inline long
981 put_it32(struct itimerval32 __user *o, struct itimerval *i)
982 {
983 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
984 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
985 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
986 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
987 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
988 }
989
990 static inline void
991 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
992 {
993 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
994 value->tv_sec = jiffies / HZ;
995 }
996
997 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
998 struct timezone __user *, tz)
999 {
1000 if (tv) {
1001 struct timeval ktv;
1002 do_gettimeofday(&ktv);
1003 if (put_tv32(tv, &ktv))
1004 return -EFAULT;
1005 }
1006 if (tz) {
1007 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
1008 return -EFAULT;
1009 }
1010 return 0;
1011 }
1012
1013 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
1014 struct timezone __user *, tz)
1015 {
1016 struct timespec kts;
1017 struct timezone ktz;
1018
1019 if (tv) {
1020 if (get_tv32((struct timeval *)&kts, tv))
1021 return -EFAULT;
1022 kts.tv_nsec *= 1000;
1023 }
1024 if (tz) {
1025 if (copy_from_user(&ktz, tz, sizeof(*tz)))
1026 return -EFAULT;
1027 }
1028
1029 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
1030 }
1031
1032 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
1033 {
1034 struct itimerval kit;
1035 int error;
1036
1037 error = do_getitimer(which, &kit);
1038 if (!error && put_it32(it, &kit))
1039 error = -EFAULT;
1040
1041 return error;
1042 }
1043
1044 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
1045 struct itimerval32 __user *, out)
1046 {
1047 struct itimerval kin, kout;
1048 int error;
1049
1050 if (in) {
1051 if (get_it32(&kin, in))
1052 return -EFAULT;
1053 } else
1054 memset(&kin, 0, sizeof(kin));
1055
1056 error = do_setitimer(which, &kin, out ? &kout : NULL);
1057 if (error || !out)
1058 return error;
1059
1060 if (put_it32(out, &kout))
1061 return -EFAULT;
1062
1063 return 0;
1064
1065 }
1066
1067 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1068 struct timeval32 __user *, tvs)
1069 {
1070 struct timespec tv[2];
1071
1072 if (tvs) {
1073 struct timeval ktvs[2];
1074 if (get_tv32(&ktvs[0], &tvs[0]) ||
1075 get_tv32(&ktvs[1], &tvs[1]))
1076 return -EFAULT;
1077
1078 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
1079 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
1080 return -EINVAL;
1081
1082 tv[0].tv_sec = ktvs[0].tv_sec;
1083 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
1084 tv[1].tv_sec = ktvs[1].tv_sec;
1085 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
1086 }
1087
1088 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1089 }
1090
1091 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1092 fd_set __user *, exp, struct timeval32 __user *, tvp)
1093 {
1094 struct timespec end_time, *to = NULL;
1095 if (tvp) {
1096 time_t sec, usec;
1097
1098 to = &end_time;
1099
1100 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
1101 || __get_user(sec, &tvp->tv_sec)
1102 || __get_user(usec, &tvp->tv_usec)) {
1103 return -EFAULT;
1104 }
1105
1106 if (sec < 0 || usec < 0)
1107 return -EINVAL;
1108
1109 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC))
1110 return -EINVAL;
1111
1112 }
1113
1114 /* OSF does not copy back the remaining time. */
1115 return core_sys_select(n, inp, outp, exp, to);
1116 }
1117
1118 struct rusage32 {
1119 struct timeval32 ru_utime; /* user time used */
1120 struct timeval32 ru_stime; /* system time used */
1121 long ru_maxrss; /* maximum resident set size */
1122 long ru_ixrss; /* integral shared memory size */
1123 long ru_idrss; /* integral unshared data size */
1124 long ru_isrss; /* integral unshared stack size */
1125 long ru_minflt; /* page reclaims */
1126 long ru_majflt; /* page faults */
1127 long ru_nswap; /* swaps */
1128 long ru_inblock; /* block input operations */
1129 long ru_oublock; /* block output operations */
1130 long ru_msgsnd; /* messages sent */
1131 long ru_msgrcv; /* messages received */
1132 long ru_nsignals; /* signals received */
1133 long ru_nvcsw; /* voluntary context switches */
1134 long ru_nivcsw; /* involuntary " */
1135 };
1136
1137 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1138 {
1139 struct rusage32 r;
1140 cputime_t utime, stime;
1141 unsigned long utime_jiffies, stime_jiffies;
1142
1143 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1144 return -EINVAL;
1145
1146 memset(&r, 0, sizeof(r));
1147 switch (who) {
1148 case RUSAGE_SELF:
1149 task_cputime(current, &utime, &stime);
1150 utime_jiffies = cputime_to_jiffies(utime);
1151 stime_jiffies = cputime_to_jiffies(stime);
1152 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1153 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1154 r.ru_minflt = current->min_flt;
1155 r.ru_majflt = current->maj_flt;
1156 break;
1157 case RUSAGE_CHILDREN:
1158 utime_jiffies = cputime_to_jiffies(current->signal->cutime);
1159 stime_jiffies = cputime_to_jiffies(current->signal->cstime);
1160 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1161 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1162 r.ru_minflt = current->signal->cmin_flt;
1163 r.ru_majflt = current->signal->cmaj_flt;
1164 break;
1165 }
1166
1167 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1168 }
1169
1170 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1171 struct rusage32 __user *, ur)
1172 {
1173 struct rusage r;
1174 long ret, err;
1175 unsigned int status = 0;
1176 mm_segment_t old_fs;
1177
1178 if (!ur)
1179 return sys_wait4(pid, ustatus, options, NULL);
1180
1181 old_fs = get_fs();
1182
1183 set_fs (KERNEL_DS);
1184 ret = sys_wait4(pid, (unsigned int __user *) &status, options,
1185 (struct rusage __user *) &r);
1186 set_fs (old_fs);
1187
1188 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1189 return -EFAULT;
1190
1191 err = 0;
1192 err |= put_user(status, ustatus);
1193 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1194 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1195 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1196 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1197 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1198 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1199 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1200 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1201 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1202 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1203 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1204 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1205 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1206 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1207 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1208 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1209 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1210 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1211
1212 return err ? err : ret;
1213 }
1214
1215 /*
1216 * I don't know what the parameters are: the first one
1217 * seems to be a timeval pointer, and I suspect the second
1218 * one is the time remaining.. Ho humm.. No documentation.
1219 */
1220 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1221 struct timeval32 __user *, remain)
1222 {
1223 struct timeval tmp;
1224 unsigned long ticks;
1225
1226 if (get_tv32(&tmp, sleep))
1227 goto fault;
1228
1229 ticks = timeval_to_jiffies(&tmp);
1230
1231 ticks = schedule_timeout_interruptible(ticks);
1232
1233 if (remain) {
1234 jiffies_to_timeval(ticks, &tmp);
1235 if (put_tv32(remain, &tmp))
1236 goto fault;
1237 }
1238
1239 return 0;
1240 fault:
1241 return -EFAULT;
1242 }
1243
1244
1245 struct timex32 {
1246 unsigned int modes; /* mode selector */
1247 long offset; /* time offset (usec) */
1248 long freq; /* frequency offset (scaled ppm) */
1249 long maxerror; /* maximum error (usec) */
1250 long esterror; /* estimated error (usec) */
1251 int status; /* clock command/status */
1252 long constant; /* pll time constant */
1253 long precision; /* clock precision (usec) (read only) */
1254 long tolerance; /* clock frequency tolerance (ppm)
1255 * (read only)
1256 */
1257 struct timeval32 time; /* (read only) */
1258 long tick; /* (modified) usecs between clock ticks */
1259
1260 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1261 long jitter; /* pps jitter (us) (ro) */
1262 int shift; /* interval duration (s) (shift) (ro) */
1263 long stabil; /* pps stability (scaled ppm) (ro) */
1264 long jitcnt; /* jitter limit exceeded (ro) */
1265 long calcnt; /* calibration intervals (ro) */
1266 long errcnt; /* calibration errors (ro) */
1267 long stbcnt; /* stability limit exceeded (ro) */
1268
1269 int :32; int :32; int :32; int :32;
1270 int :32; int :32; int :32; int :32;
1271 int :32; int :32; int :32; int :32;
1272 };
1273
1274 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1275 {
1276 struct timex txc;
1277 int ret;
1278
1279 /* copy relevant bits of struct timex. */
1280 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1281 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1282 offsetof(struct timex32, time)))
1283 return -EFAULT;
1284
1285 ret = do_adjtimex(&txc);
1286 if (ret < 0)
1287 return ret;
1288
1289 /* copy back to timex32 */
1290 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1291 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1292 offsetof(struct timex32, tick))) ||
1293 (put_tv32(&txc_p->time, &txc.time)))
1294 return -EFAULT;
1295
1296 return ret;
1297 }
1298
1299 /* Get an address range which is currently unmapped. Similar to the
1300 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1301
1302 static unsigned long
1303 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1304 unsigned long limit)
1305 {
1306 struct vm_unmapped_area_info info;
1307
1308 info.flags = 0;
1309 info.length = len;
1310 info.low_limit = addr;
1311 info.high_limit = limit;
1312 info.align_mask = 0;
1313 info.align_offset = 0;
1314 return vm_unmapped_area(&info);
1315 }
1316
1317 unsigned long
1318 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1319 unsigned long len, unsigned long pgoff,
1320 unsigned long flags)
1321 {
1322 unsigned long limit;
1323
1324 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1325 if (current->personality & ADDR_LIMIT_32BIT)
1326 limit = 0x80000000;
1327 else
1328 limit = TASK_SIZE;
1329
1330 if (len > limit)
1331 return -ENOMEM;
1332
1333 if (flags & MAP_FIXED)
1334 return addr;
1335
1336 /* First, see if the given suggestion fits.
1337
1338 The OSF/1 loader (/sbin/loader) relies on us returning an
1339 address larger than the requested if one exists, which is
1340 a terribly broken way to program.
1341
1342 That said, I can see the use in being able to suggest not
1343 merely specific addresses, but regions of memory -- perhaps
1344 this feature should be incorporated into all ports? */
1345
1346 if (addr) {
1347 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1348 if (addr != (unsigned long) -ENOMEM)
1349 return addr;
1350 }
1351
1352 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1353 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1354 len, limit);
1355 if (addr != (unsigned long) -ENOMEM)
1356 return addr;
1357
1358 /* Finally, try allocating in low memory. */
1359 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1360
1361 return addr;
1362 }
1363
1364 #ifdef CONFIG_OSF4_COMPAT
1365
1366 /* Clear top 32 bits of iov_len in the user's buffer for
1367 compatibility with old versions of OSF/1 where iov_len
1368 was defined as int. */
1369 static int
1370 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1371 {
1372 unsigned long i;
1373
1374 for (i = 0 ; i < count ; i++) {
1375 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1376
1377 if (put_user(0, iov_len_high))
1378 return -EFAULT;
1379 }
1380 return 0;
1381 }
1382
1383 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1384 const struct iovec __user *, vector, unsigned long, count)
1385 {
1386 if (unlikely(personality(current->personality) == PER_OSF4))
1387 if (osf_fix_iov_len(vector, count))
1388 return -EFAULT;
1389 return sys_readv(fd, vector, count);
1390 }
1391
1392 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1393 const struct iovec __user *, vector, unsigned long, count)
1394 {
1395 if (unlikely(personality(current->personality) == PER_OSF4))
1396 if (osf_fix_iov_len(vector, count))
1397 return -EFAULT;
1398 return sys_writev(fd, vector, count);
1399 }
1400
1401 #endif
1402
1403 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1404 {
1405 int prio = sys_getpriority(which, who);
1406 if (prio >= 0) {
1407 /* Return value is the unbiased priority, i.e. 20 - prio.
1408 This does result in negative return values, so signal
1409 no error */
1410 force_successful_syscall_return();
1411 prio = 20 - prio;
1412 }
1413 return prio;
1414 }
1415
1416 SYSCALL_DEFINE0(getxuid)
1417 {
1418 current_pt_regs()->r20 = sys_geteuid();
1419 return sys_getuid();
1420 }
1421
1422 SYSCALL_DEFINE0(getxgid)
1423 {
1424 current_pt_regs()->r20 = sys_getegid();
1425 return sys_getgid();
1426 }
1427
1428 SYSCALL_DEFINE0(getxpid)
1429 {
1430 current_pt_regs()->r20 = sys_getppid();
1431 return sys_getpid();
1432 }
1433
1434 SYSCALL_DEFINE0(alpha_pipe)
1435 {
1436 int fd[2];
1437 int res = do_pipe_flags(fd, 0);
1438 if (!res) {
1439 /* The return values are in $0 and $20. */
1440 current_pt_regs()->r20 = fd[1];
1441 res = fd[0];
1442 }
1443 return res;
1444 }
1445
1446 SYSCALL_DEFINE1(sethae, unsigned long, val)
1447 {
1448 current_pt_regs()->hae = val;
1449 return 0;
1450 }
Linux kernel - Deliverables
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