projects / deliverable / linux.git / blob
? search:


1402fcc11c2c0443d18d59e21192f5af50ecb1c2
[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(void *__buf, const char *name, int namlen, loff_t offset,
108 u64 ino, unsigned int d_type)
109 {
110 struct osf_dirent __user *dirent;
111 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf;
112 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
113 unsigned int d_ino;
114
115 buf->error = -EINVAL; /* only used if we fail */
116 if (reclen > buf->count)
117 return -EINVAL;
118 d_ino = ino;
119 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
120 buf->error = -EOVERFLOW;
121 return -EOVERFLOW;
122 }
123 if (buf->basep) {
124 if (put_user(offset, buf->basep))
125 goto Efault;
126 buf->basep = NULL;
127 }
128 dirent = buf->dirent;
129 if (put_user(d_ino, &dirent->d_ino) ||
130 put_user(namlen, &dirent->d_namlen) ||
131 put_user(reclen, &dirent->d_reclen) ||
132 copy_to_user(dirent->d_name, name, namlen) ||
133 put_user(0, dirent->d_name + namlen))
134 goto Efault;
135 dirent = (void __user *)dirent + reclen;
136 buf->dirent = dirent;
137 buf->count -= reclen;
138 return 0;
139 Efault:
140 buf->error = -EFAULT;
141 return -EFAULT;
142 }
143
144 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
145 struct osf_dirent __user *, dirent, unsigned int, count,
146 long __user *, basep)
147 {
148 int error;
149 struct fd arg = fdget(fd);
150 struct osf_dirent_callback buf = {
151 .ctx.actor = osf_filldir,
152 .dirent = dirent,
153 .basep = basep,
154 .count = count
155 };
156
157 if (!arg.file)
158 return -EBADF;
159
160 error = iterate_dir(arg.file, &buf.ctx);
161 if (error >= 0)
162 error = buf.error;
163 if (count != buf.count)
164 error = count - buf.count;
165
166 fdput(arg);
167 return error;
168 }
169
170 #undef NAME_OFFSET
171
172 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
173 unsigned long, prot, unsigned long, flags, unsigned long, fd,
174 unsigned long, off)
175 {
176 unsigned long ret = -EINVAL;
177
178 #if 0
179 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
180 printk("%s: unimplemented OSF mmap flags %04lx\n",
181 current->comm, flags);
182 #endif
183 if ((off + PAGE_ALIGN(len)) < off)
184 goto out;
185 if (off & ~PAGE_MASK)
186 goto out;
187 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
188 out:
189 return ret;
190 }
191
192 struct osf_stat {
193 int st_dev;
194 int st_pad1;
195 unsigned st_mode;
196 unsigned short st_nlink;
197 short st_nlink_reserved;
198 unsigned st_uid;
199 unsigned st_gid;
200 int st_rdev;
201 int st_ldev;
202 long st_size;
203 int st_pad2;
204 int st_uatime;
205 int st_pad3;
206 int st_umtime;
207 int st_pad4;
208 int st_uctime;
209 int st_pad5;
210 int st_pad6;
211 unsigned st_flags;
212 unsigned st_gen;
213 long st_spare[4];
214 unsigned st_ino;
215 int st_ino_reserved;
216 int st_atime;
217 int st_atime_reserved;
218 int st_mtime;
219 int st_mtime_reserved;
220 int st_ctime;
221 int st_ctime_reserved;
222 long st_blksize;
223 long st_blocks;
224 };
225
226 /*
227 * The OSF/1 statfs structure is much larger, but this should
228 * match the beginning, at least.
229 */
230 struct osf_statfs {
231 short f_type;
232 short f_flags;
233 int f_fsize;
234 int f_bsize;
235 int f_blocks;
236 int f_bfree;
237 int f_bavail;
238 int f_files;
239 int f_ffree;
240 __kernel_fsid_t f_fsid;
241 };
242
243 struct osf_statfs64 {
244 short f_type;
245 short f_flags;
246 int f_pad1;
247 int f_pad2;
248 int f_pad3;
249 int f_pad4;
250 int f_pad5;
251 int f_pad6;
252 int f_pad7;
253 __kernel_fsid_t f_fsid;
254 u_short f_namemax;
255 short f_reserved1;
256 int f_spare[8];
257 char f_pad8[90];
258 char f_pad9[90];
259 long mount_info[10];
260 u_long f_flags2;
261 long f_spare2[14];
262 long f_fsize;
263 long f_bsize;
264 long f_blocks;
265 long f_bfree;
266 long f_bavail;
267 long f_files;
268 long f_ffree;
269 };
270
271 static int
272 linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat)
273 {
274 struct osf_stat tmp = { 0 };
275
276 tmp.st_dev = lstat->dev;
277 tmp.st_mode = lstat->mode;
278 tmp.st_nlink = lstat->nlink;
279 tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid);
280 tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid);
281 tmp.st_rdev = lstat->rdev;
282 tmp.st_ldev = lstat->rdev;
283 tmp.st_size = lstat->size;
284 tmp.st_uatime = lstat->atime.tv_nsec / 1000;
285 tmp.st_umtime = lstat->mtime.tv_nsec / 1000;
286 tmp.st_uctime = lstat->ctime.tv_nsec / 1000;
287 tmp.st_ino = lstat->ino;
288 tmp.st_atime = lstat->atime.tv_sec;
289 tmp.st_mtime = lstat->mtime.tv_sec;
290 tmp.st_ctime = lstat->ctime.tv_sec;
291 tmp.st_blksize = lstat->blksize;
292 tmp.st_blocks = lstat->blocks;
293
294 return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0;
295 }
296
297 static int
298 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
299 unsigned long bufsiz)
300 {
301 struct osf_statfs tmp_stat;
302
303 tmp_stat.f_type = linux_stat->f_type;
304 tmp_stat.f_flags = 0; /* mount flags */
305 tmp_stat.f_fsize = linux_stat->f_frsize;
306 tmp_stat.f_bsize = linux_stat->f_bsize;
307 tmp_stat.f_blocks = linux_stat->f_blocks;
308 tmp_stat.f_bfree = linux_stat->f_bfree;
309 tmp_stat.f_bavail = linux_stat->f_bavail;
310 tmp_stat.f_files = linux_stat->f_files;
311 tmp_stat.f_ffree = linux_stat->f_ffree;
312 tmp_stat.f_fsid = linux_stat->f_fsid;
313 if (bufsiz > sizeof(tmp_stat))
314 bufsiz = sizeof(tmp_stat);
315 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
316 }
317
318 static int
319 linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat,
320 unsigned long bufsiz)
321 {
322 struct osf_statfs64 tmp_stat = { 0 };
323
324 tmp_stat.f_type = linux_stat->f_type;
325 tmp_stat.f_fsize = linux_stat->f_frsize;
326 tmp_stat.f_bsize = linux_stat->f_bsize;
327 tmp_stat.f_blocks = linux_stat->f_blocks;
328 tmp_stat.f_bfree = linux_stat->f_bfree;
329 tmp_stat.f_bavail = linux_stat->f_bavail;
330 tmp_stat.f_files = linux_stat->f_files;
331 tmp_stat.f_ffree = linux_stat->f_ffree;
332 tmp_stat.f_fsid = linux_stat->f_fsid;
333 if (bufsiz > sizeof(tmp_stat))
334 bufsiz = sizeof(tmp_stat);
335 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
336 }
337
338 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
339 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
340 {
341 struct kstatfs linux_stat;
342 int error = user_statfs(pathname, &linux_stat);
343 if (!error)
344 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
345 return error;
346 }
347
348 SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
349 {
350 struct kstat stat;
351 int error;
352
353 error = vfs_stat(name, &stat);
354 if (error)
355 return error;
356
357 return linux_to_osf_stat(&stat, buf);
358 }
359
360 SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf)
361 {
362 struct kstat stat;
363 int error;
364
365 error = vfs_lstat(name, &stat);
366 if (error)
367 return error;
368
369 return linux_to_osf_stat(&stat, buf);
370 }
371
372 SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf)
373 {
374 struct kstat stat;
375 int error;
376
377 error = vfs_fstat(fd, &stat);
378 if (error)
379 return error;
380
381 return linux_to_osf_stat(&stat, buf);
382 }
383
384 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
385 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
386 {
387 struct kstatfs linux_stat;
388 int error = fd_statfs(fd, &linux_stat);
389 if (!error)
390 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
391 return error;
392 }
393
394 SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname,
395 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
396 {
397 struct kstatfs linux_stat;
398 int error = user_statfs(pathname, &linux_stat);
399 if (!error)
400 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
401 return error;
402 }
403
404 SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd,
405 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
406 {
407 struct kstatfs linux_stat;
408 int error = fd_statfs(fd, &linux_stat);
409 if (!error)
410 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
411 return error;
412 }
413
414 /*
415 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
416 *
417 * Although to be frank, neither are the native Linux/i386 ones..
418 */
419 struct ufs_args {
420 char __user *devname;
421 int flags;
422 uid_t exroot;
423 };
424
425 struct cdfs_args {
426 char __user *devname;
427 int flags;
428 uid_t exroot;
429
430 /* This has lots more here, which Linux handles with the option block
431 but I'm too lazy to do the translation into ASCII. */
432 };
433
434 struct procfs_args {
435 char __user *devname;
436 int flags;
437 uid_t exroot;
438 };
439
440 /*
441 * We can't actually handle ufs yet, so we translate UFS mounts to
442 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
443 * layout is so braindead it's a major headache doing it.
444 *
445 * Just how long ago was it written? OTOH our UFS driver may be still
446 * unhappy with OSF UFS. [CHECKME]
447 */
448 static int
449 osf_ufs_mount(const char *dirname, struct ufs_args __user *args, int flags)
450 {
451 int retval;
452 struct cdfs_args tmp;
453 struct filename *devname;
454
455 retval = -EFAULT;
456 if (copy_from_user(&tmp, args, sizeof(tmp)))
457 goto out;
458 devname = getname(tmp.devname);
459 retval = PTR_ERR(devname);
460 if (IS_ERR(devname))
461 goto out;
462 retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
463 putname(devname);
464 out:
465 return retval;
466 }
467
468 static int
469 osf_cdfs_mount(const char *dirname, struct cdfs_args __user *args, int flags)
470 {
471 int retval;
472 struct cdfs_args tmp;
473 struct filename *devname;
474
475 retval = -EFAULT;
476 if (copy_from_user(&tmp, args, sizeof(tmp)))
477 goto out;
478 devname = getname(tmp.devname);
479 retval = PTR_ERR(devname);
480 if (IS_ERR(devname))
481 goto out;
482 retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
483 putname(devname);
484 out:
485 return retval;
486 }
487
488 static int
489 osf_procfs_mount(const char *dirname, struct procfs_args __user *args, int flags)
490 {
491 struct procfs_args tmp;
492
493 if (copy_from_user(&tmp, args, sizeof(tmp)))
494 return -EFAULT;
495
496 return do_mount("", dirname, "proc", flags, NULL);
497 }
498
499 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
500 int, flag, void __user *, data)
501 {
502 int retval;
503 struct filename *name;
504
505 name = getname(path);
506 retval = PTR_ERR(name);
507 if (IS_ERR(name))
508 goto out;
509 switch (typenr) {
510 case 1:
511 retval = osf_ufs_mount(name->name, data, flag);
512 break;
513 case 6:
514 retval = osf_cdfs_mount(name->name, data, flag);
515 break;
516 case 9:
517 retval = osf_procfs_mount(name->name, data, flag);
518 break;
519 default:
520 retval = -EINVAL;
521 printk("osf_mount(%ld, %x)\n", typenr, flag);
522 }
523 putname(name);
524 out:
525 return retval;
526 }
527
528 SYSCALL_DEFINE1(osf_utsname, char __user *, name)
529 {
530 int error;
531
532 down_read(&uts_sem);
533 error = -EFAULT;
534 if (copy_to_user(name + 0, utsname()->sysname, 32))
535 goto out;
536 if (copy_to_user(name + 32, utsname()->nodename, 32))
537 goto out;
538 if (copy_to_user(name + 64, utsname()->release, 32))
539 goto out;
540 if (copy_to_user(name + 96, utsname()->version, 32))
541 goto out;
542 if (copy_to_user(name + 128, utsname()->machine, 32))
543 goto out;
544
545 error = 0;
546 out:
547 up_read(&uts_sem);
548 return error;
549 }
550
551 SYSCALL_DEFINE0(getpagesize)
552 {
553 return PAGE_SIZE;
554 }
555
556 SYSCALL_DEFINE0(getdtablesize)
557 {
558 return sysctl_nr_open;
559 }
560
561 /*
562 * For compatibility with OSF/1 only. Use utsname(2) instead.
563 */
564 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
565 {
566 unsigned len;
567 int i;
568
569 if (!access_ok(VERIFY_WRITE, name, namelen))
570 return -EFAULT;
571
572 len = namelen;
573 if (len > 32)
574 len = 32;
575
576 down_read(&uts_sem);
577 for (i = 0; i < len; ++i) {
578 __put_user(utsname()->domainname[i], name + i);
579 if (utsname()->domainname[i] == '\0')
580 break;
581 }
582 up_read(&uts_sem);
583
584 return 0;
585 }
586
587 /*
588 * The following stuff should move into a header file should it ever
589 * be labeled "officially supported." Right now, there is just enough
590 * support to avoid applications (such as tar) printing error
591 * messages. The attributes are not really implemented.
592 */
593
594 /*
595 * Values for Property list entry flag
596 */
597 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
598 by default */
599 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
600 #define PLE_FLAG_ALL -1 /* All flag value */
601
602 struct proplistname_args {
603 unsigned int pl_mask;
604 unsigned int pl_numnames;
605 char **pl_names;
606 };
607
608 union pl_args {
609 struct setargs {
610 char __user *path;
611 long follow;
612 long nbytes;
613 char __user *buf;
614 } set;
615 struct fsetargs {
616 long fd;
617 long nbytes;
618 char __user *buf;
619 } fset;
620 struct getargs {
621 char __user *path;
622 long follow;
623 struct proplistname_args __user *name_args;
624 long nbytes;
625 char __user *buf;
626 int __user *min_buf_size;
627 } get;
628 struct fgetargs {
629 long fd;
630 struct proplistname_args __user *name_args;
631 long nbytes;
632 char __user *buf;
633 int __user *min_buf_size;
634 } fget;
635 struct delargs {
636 char __user *path;
637 long follow;
638 struct proplistname_args __user *name_args;
639 } del;
640 struct fdelargs {
641 long fd;
642 struct proplistname_args __user *name_args;
643 } fdel;
644 };
645
646 enum pl_code {
647 PL_SET = 1, PL_FSET = 2,
648 PL_GET = 3, PL_FGET = 4,
649 PL_DEL = 5, PL_FDEL = 6
650 };
651
652 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
653 union pl_args __user *, args)
654 {
655 long error;
656 int __user *min_buf_size_ptr;
657
658 switch (code) {
659 case PL_SET:
660 if (get_user(error, &args->set.nbytes))
661 error = -EFAULT;
662 break;
663 case PL_FSET:
664 if (get_user(error, &args->fset.nbytes))
665 error = -EFAULT;
666 break;
667 case PL_GET:
668 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
669 if (error)
670 break;
671 error = put_user(0, min_buf_size_ptr);
672 break;
673 case PL_FGET:
674 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
675 if (error)
676 break;
677 error = put_user(0, min_buf_size_ptr);
678 break;
679 case PL_DEL:
680 case PL_FDEL:
681 error = 0;
682 break;
683 default:
684 error = -EOPNOTSUPP;
685 break;
686 };
687 return error;
688 }
689
690 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
691 struct sigstack __user *, uoss)
692 {
693 unsigned long usp = rdusp();
694 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
695 unsigned long oss_os = on_sig_stack(usp);
696 int error;
697
698 if (uss) {
699 void __user *ss_sp;
700
701 error = -EFAULT;
702 if (get_user(ss_sp, &uss->ss_sp))
703 goto out;
704
705 /* If the current stack was set with sigaltstack, don't
706 swap stacks while we are on it. */
707 error = -EPERM;
708 if (current->sas_ss_sp && on_sig_stack(usp))
709 goto out;
710
711 /* Since we don't know the extent of the stack, and we don't
712 track onstack-ness, but rather calculate it, we must
713 presume a size. Ho hum this interface is lossy. */
714 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
715 current->sas_ss_size = SIGSTKSZ;
716 }
717
718 if (uoss) {
719 error = -EFAULT;
720 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
721 || __put_user(oss_sp, &uoss->ss_sp)
722 || __put_user(oss_os, &uoss->ss_onstack))
723 goto out;
724 }
725
726 error = 0;
727 out:
728 return error;
729 }
730
731 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
732 {
733 const char *sysinfo_table[] = {
734 utsname()->sysname,
735 utsname()->nodename,
736 utsname()->release,
737 utsname()->version,
738 utsname()->machine,
739 "alpha", /* instruction set architecture */
740 "dummy", /* hardware serial number */
741 "dummy", /* hardware manufacturer */
742 "dummy", /* secure RPC domain */
743 };
744 unsigned long offset;
745 const char *res;
746 long len, err = -EINVAL;
747
748 offset = command-1;
749 if (offset >= ARRAY_SIZE(sysinfo_table)) {
750 /* Digital UNIX has a few unpublished interfaces here */
751 printk("sysinfo(%d)", command);
752 goto out;
753 }
754
755 down_read(&uts_sem);
756 res = sysinfo_table[offset];
757 len = strlen(res)+1;
758 if ((unsigned long)len > (unsigned long)count)
759 len = count;
760 if (copy_to_user(buf, res, len))
761 err = -EFAULT;
762 else
763 err = 0;
764 up_read(&uts_sem);
765 out:
766 return err;
767 }
768
769 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
770 unsigned long, nbytes, int __user *, start, void __user *, arg)
771 {
772 unsigned long w;
773 struct percpu_struct *cpu;
774
775 switch (op) {
776 case GSI_IEEE_FP_CONTROL:
777 /* Return current software fp control & status bits. */
778 /* Note that DU doesn't verify available space here. */
779
780 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
781 w = swcr_update_status(w, rdfpcr());
782 if (put_user(w, (unsigned long __user *) buffer))
783 return -EFAULT;
784 return 0;
785
786 case GSI_IEEE_STATE_AT_SIGNAL:
787 /*
788 * Not sure anybody will ever use this weird stuff. These
789 * ops can be used (under OSF/1) to set the fpcr that should
790 * be used when a signal handler starts executing.
791 */
792 break;
793
794 case GSI_UACPROC:
795 if (nbytes < sizeof(unsigned int))
796 return -EINVAL;
797 w = current_thread_info()->status & UAC_BITMASK;
798 if (put_user(w, (unsigned int __user *)buffer))
799 return -EFAULT;
800 return 1;
801
802 case GSI_PROC_TYPE:
803 if (nbytes < sizeof(unsigned long))
804 return -EINVAL;
805 cpu = (struct percpu_struct*)
806 ((char*)hwrpb + hwrpb->processor_offset);
807 w = cpu->type;
808 if (put_user(w, (unsigned long __user*)buffer))
809 return -EFAULT;
810 return 1;
811
812 case GSI_GET_HWRPB:
813 if (nbytes > sizeof(*hwrpb))
814 return -EINVAL;
815 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
816 return -EFAULT;
817 return 1;
818
819 default:
820 break;
821 }
822
823 return -EOPNOTSUPP;
824 }
825
826 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
827 unsigned long, nbytes, int __user *, start, void __user *, arg)
828 {
829 switch (op) {
830 case SSI_IEEE_FP_CONTROL: {
831 unsigned long swcr, fpcr;
832 unsigned int *state;
833
834 /*
835 * Alpha Architecture Handbook 4.7.7.3:
836 * To be fully IEEE compiant, we must track the current IEEE
837 * exception state in software, because spurious bits can be
838 * set in the trap shadow of a software-complete insn.
839 */
840
841 if (get_user(swcr, (unsigned long __user *)buffer))
842 return -EFAULT;
843 state = &current_thread_info()->ieee_state;
844
845 /* Update softare trap enable bits. */
846 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
847
848 /* Update the real fpcr. */
849 fpcr = rdfpcr() & FPCR_DYN_MASK;
850 fpcr |= ieee_swcr_to_fpcr(swcr);
851 wrfpcr(fpcr);
852
853 return 0;
854 }
855
856 case SSI_IEEE_RAISE_EXCEPTION: {
857 unsigned long exc, swcr, fpcr, fex;
858 unsigned int *state;
859
860 if (get_user(exc, (unsigned long __user *)buffer))
861 return -EFAULT;
862 state = &current_thread_info()->ieee_state;
863 exc &= IEEE_STATUS_MASK;
864
865 /* Update softare trap enable bits. */
866 swcr = (*state & IEEE_SW_MASK) | exc;
867 *state |= exc;
868
869 /* Update the real fpcr. */
870 fpcr = rdfpcr();
871 fpcr |= ieee_swcr_to_fpcr(swcr);
872 wrfpcr(fpcr);
873
874 /* If any exceptions set by this call, and are unmasked,
875 send a signal. Old exceptions are not signaled. */
876 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
877 if (fex) {
878 siginfo_t info;
879 int si_code = 0;
880
881 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
882 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
883 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
884 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
885 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
886 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
887
888 info.si_signo = SIGFPE;
889 info.si_errno = 0;
890 info.si_code = si_code;
891 info.si_addr = NULL; /* FIXME */
892 send_sig_info(SIGFPE, &info, current);
893 }
894 return 0;
895 }
896
897 case SSI_IEEE_STATE_AT_SIGNAL:
898 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
899 /*
900 * Not sure anybody will ever use this weird stuff. These
901 * ops can be used (under OSF/1) to set the fpcr that should
902 * be used when a signal handler starts executing.
903 */
904 break;
905
906 case SSI_NVPAIRS: {
907 unsigned __user *p = buffer;
908 unsigned i;
909
910 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
911 unsigned v, w, status;
912
913 if (get_user(v, p) || get_user(w, p + 1))
914 return -EFAULT;
915 switch (v) {
916 case SSIN_UACPROC:
917 w &= UAC_BITMASK;
918 status = current_thread_info()->status;
919 status = (status & ~UAC_BITMASK) | w;
920 current_thread_info()->status = status;
921 break;
922
923 default:
924 return -EOPNOTSUPP;
925 }
926 }
927 return 0;
928 }
929
930 case SSI_LMF:
931 return 0;
932
933 default:
934 break;
935 }
936
937 return -EOPNOTSUPP;
938 }
939
940 /* Translations due to the fact that OSF's time_t is an int. Which
941 affects all sorts of things, like timeval and itimerval. */
942
943 extern struct timezone sys_tz;
944
945 struct timeval32
946 {
947 int tv_sec, tv_usec;
948 };
949
950 struct itimerval32
951 {
952 struct timeval32 it_interval;
953 struct timeval32 it_value;
954 };
955
956 static inline long
957 get_tv32(struct timeval *o, struct timeval32 __user *i)
958 {
959 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
960 (__get_user(o->tv_sec, &i->tv_sec) |
961 __get_user(o->tv_usec, &i->tv_usec)));
962 }
963
964 static inline long
965 put_tv32(struct timeval32 __user *o, struct timeval *i)
966 {
967 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
968 (__put_user(i->tv_sec, &o->tv_sec) |
969 __put_user(i->tv_usec, &o->tv_usec)));
970 }
971
972 static inline long
973 get_it32(struct itimerval *o, struct itimerval32 __user *i)
974 {
975 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
976 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
977 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
978 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
979 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
980 }
981
982 static inline long
983 put_it32(struct itimerval32 __user *o, struct itimerval *i)
984 {
985 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
986 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
987 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
988 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
989 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
990 }
991
992 static inline void
993 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
994 {
995 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
996 value->tv_sec = jiffies / HZ;
997 }
998
999 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
1000 struct timezone __user *, tz)
1001 {
1002 if (tv) {
1003 struct timeval ktv;
1004 do_gettimeofday(&ktv);
1005 if (put_tv32(tv, &ktv))
1006 return -EFAULT;
1007 }
1008 if (tz) {
1009 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
1010 return -EFAULT;
1011 }
1012 return 0;
1013 }
1014
1015 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
1016 struct timezone __user *, tz)
1017 {
1018 struct timespec kts;
1019 struct timezone ktz;
1020
1021 if (tv) {
1022 if (get_tv32((struct timeval *)&kts, tv))
1023 return -EFAULT;
1024 }
1025 if (tz) {
1026 if (copy_from_user(&ktz, tz, sizeof(*tz)))
1027 return -EFAULT;
1028 }
1029
1030 kts.tv_nsec *= 1000;
1031
1032 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
1033 }
1034
1035 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
1036 {
1037 struct itimerval kit;
1038 int error;
1039
1040 error = do_getitimer(which, &kit);
1041 if (!error && put_it32(it, &kit))
1042 error = -EFAULT;
1043
1044 return error;
1045 }
1046
1047 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
1048 struct itimerval32 __user *, out)
1049 {
1050 struct itimerval kin, kout;
1051 int error;
1052
1053 if (in) {
1054 if (get_it32(&kin, in))
1055 return -EFAULT;
1056 } else
1057 memset(&kin, 0, sizeof(kin));
1058
1059 error = do_setitimer(which, &kin, out ? &kout : NULL);
1060 if (error || !out)
1061 return error;
1062
1063 if (put_it32(out, &kout))
1064 return -EFAULT;
1065
1066 return 0;
1067
1068 }
1069
1070 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1071 struct timeval32 __user *, tvs)
1072 {
1073 struct timespec tv[2];
1074
1075 if (tvs) {
1076 struct timeval ktvs[2];
1077 if (get_tv32(&ktvs[0], &tvs[0]) ||
1078 get_tv32(&ktvs[1], &tvs[1]))
1079 return -EFAULT;
1080
1081 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
1082 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
1083 return -EINVAL;
1084
1085 tv[0].tv_sec = ktvs[0].tv_sec;
1086 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
1087 tv[1].tv_sec = ktvs[1].tv_sec;
1088 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
1089 }
1090
1091 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1092 }
1093
1094 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1095 fd_set __user *, exp, struct timeval32 __user *, tvp)
1096 {
1097 struct timespec end_time, *to = NULL;
1098 if (tvp) {
1099 time_t sec, usec;
1100
1101 to = &end_time;
1102
1103 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
1104 || __get_user(sec, &tvp->tv_sec)
1105 || __get_user(usec, &tvp->tv_usec)) {
1106 return -EFAULT;
1107 }
1108
1109 if (sec < 0 || usec < 0)
1110 return -EINVAL;
1111
1112 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC))
1113 return -EINVAL;
1114
1115 }
1116
1117 /* OSF does not copy back the remaining time. */
1118 return core_sys_select(n, inp, outp, exp, to);
1119 }
1120
1121 struct rusage32 {
1122 struct timeval32 ru_utime; /* user time used */
1123 struct timeval32 ru_stime; /* system time used */
1124 long ru_maxrss; /* maximum resident set size */
1125 long ru_ixrss; /* integral shared memory size */
1126 long ru_idrss; /* integral unshared data size */
1127 long ru_isrss; /* integral unshared stack size */
1128 long ru_minflt; /* page reclaims */
1129 long ru_majflt; /* page faults */
1130 long ru_nswap; /* swaps */
1131 long ru_inblock; /* block input operations */
1132 long ru_oublock; /* block output operations */
1133 long ru_msgsnd; /* messages sent */
1134 long ru_msgrcv; /* messages received */
1135 long ru_nsignals; /* signals received */
1136 long ru_nvcsw; /* voluntary context switches */
1137 long ru_nivcsw; /* involuntary " */
1138 };
1139
1140 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1141 {
1142 struct rusage32 r;
1143 cputime_t utime, stime;
1144
1145 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1146 return -EINVAL;
1147
1148 memset(&r, 0, sizeof(r));
1149 switch (who) {
1150 case RUSAGE_SELF:
1151 task_cputime(current, &utime, &stime);
1152 jiffies_to_timeval32(utime, &r.ru_utime);
1153 jiffies_to_timeval32(stime, &r.ru_stime);
1154 r.ru_minflt = current->min_flt;
1155 r.ru_majflt = current->maj_flt;
1156 break;
1157 case RUSAGE_CHILDREN:
1158 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1159 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1160 r.ru_minflt = current->signal->cmin_flt;
1161 r.ru_majflt = current->signal->cmaj_flt;
1162 break;
1163 }
1164
1165 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1166 }
1167
1168 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1169 struct rusage32 __user *, ur)
1170 {
1171 struct rusage r;
1172 long ret, err;
1173 unsigned int status = 0;
1174 mm_segment_t old_fs;
1175
1176 if (!ur)
1177 return sys_wait4(pid, ustatus, options, NULL);
1178
1179 old_fs = get_fs();
1180
1181 set_fs (KERNEL_DS);
1182 ret = sys_wait4(pid, (unsigned int __user *) &status, options,
1183 (struct rusage __user *) &r);
1184 set_fs (old_fs);
1185
1186 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1187 return -EFAULT;
1188
1189 err = 0;
1190 err |= put_user(status, ustatus);
1191 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1192 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1193 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1194 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1195 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1196 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1197 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1198 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1199 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1200 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1201 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1202 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1203 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1204 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1205 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1206 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1207 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1208 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1209
1210 return err ? err : ret;
1211 }
1212
1213 /*
1214 * I don't know what the parameters are: the first one
1215 * seems to be a timeval pointer, and I suspect the second
1216 * one is the time remaining.. Ho humm.. No documentation.
1217 */
1218 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1219 struct timeval32 __user *, remain)
1220 {
1221 struct timeval tmp;
1222 unsigned long ticks;
1223
1224 if (get_tv32(&tmp, sleep))
1225 goto fault;
1226
1227 ticks = timeval_to_jiffies(&tmp);
1228
1229 ticks = schedule_timeout_interruptible(ticks);
1230
1231 if (remain) {
1232 jiffies_to_timeval(ticks, &tmp);
1233 if (put_tv32(remain, &tmp))
1234 goto fault;
1235 }
1236
1237 return 0;
1238 fault:
1239 return -EFAULT;
1240 }
1241
1242
1243 struct timex32 {
1244 unsigned int modes; /* mode selector */
1245 long offset; /* time offset (usec) */
1246 long freq; /* frequency offset (scaled ppm) */
1247 long maxerror; /* maximum error (usec) */
1248 long esterror; /* estimated error (usec) */
1249 int status; /* clock command/status */
1250 long constant; /* pll time constant */
1251 long precision; /* clock precision (usec) (read only) */
1252 long tolerance; /* clock frequency tolerance (ppm)
1253 * (read only)
1254 */
1255 struct timeval32 time; /* (read only) */
1256 long tick; /* (modified) usecs between clock ticks */
1257
1258 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1259 long jitter; /* pps jitter (us) (ro) */
1260 int shift; /* interval duration (s) (shift) (ro) */
1261 long stabil; /* pps stability (scaled ppm) (ro) */
1262 long jitcnt; /* jitter limit exceeded (ro) */
1263 long calcnt; /* calibration intervals (ro) */
1264 long errcnt; /* calibration errors (ro) */
1265 long stbcnt; /* stability limit exceeded (ro) */
1266
1267 int :32; int :32; int :32; int :32;
1268 int :32; int :32; int :32; int :32;
1269 int :32; int :32; int :32; int :32;
1270 };
1271
1272 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1273 {
1274 struct timex txc;
1275 int ret;
1276
1277 /* copy relevant bits of struct timex. */
1278 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1279 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1280 offsetof(struct timex32, time)))
1281 return -EFAULT;
1282
1283 ret = do_adjtimex(&txc);
1284 if (ret < 0)
1285 return ret;
1286
1287 /* copy back to timex32 */
1288 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1289 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1290 offsetof(struct timex32, tick))) ||
1291 (put_tv32(&txc_p->time, &txc.time)))
1292 return -EFAULT;
1293
1294 return ret;
1295 }
1296
1297 /* Get an address range which is currently unmapped. Similar to the
1298 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1299
1300 static unsigned long
1301 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1302 unsigned long limit)
1303 {
1304 struct vm_unmapped_area_info info;
1305
1306 info.flags = 0;
1307 info.length = len;
1308 info.low_limit = addr;
1309 info.high_limit = limit;
1310 info.align_mask = 0;
1311 info.align_offset = 0;
1312 return vm_unmapped_area(&info);
1313 }
1314
1315 unsigned long
1316 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1317 unsigned long len, unsigned long pgoff,
1318 unsigned long flags)
1319 {
1320 unsigned long limit;
1321
1322 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1323 if (current->personality & ADDR_LIMIT_32BIT)
1324 limit = 0x80000000;
1325 else
1326 limit = TASK_SIZE;
1327
1328 if (len > limit)
1329 return -ENOMEM;
1330
1331 if (flags & MAP_FIXED)
1332 return addr;
1333
1334 /* First, see if the given suggestion fits.
1335
1336 The OSF/1 loader (/sbin/loader) relies on us returning an
1337 address larger than the requested if one exists, which is
1338 a terribly broken way to program.
1339
1340 That said, I can see the use in being able to suggest not
1341 merely specific addresses, but regions of memory -- perhaps
1342 this feature should be incorporated into all ports? */
1343
1344 if (addr) {
1345 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1346 if (addr != (unsigned long) -ENOMEM)
1347 return addr;
1348 }
1349
1350 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1351 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1352 len, limit);
1353 if (addr != (unsigned long) -ENOMEM)
1354 return addr;
1355
1356 /* Finally, try allocating in low memory. */
1357 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1358
1359 return addr;
1360 }
1361
1362 #ifdef CONFIG_OSF4_COMPAT
1363
1364 /* Clear top 32 bits of iov_len in the user's buffer for
1365 compatibility with old versions of OSF/1 where iov_len
1366 was defined as int. */
1367 static int
1368 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1369 {
1370 unsigned long i;
1371
1372 for (i = 0 ; i < count ; i++) {
1373 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1374
1375 if (put_user(0, iov_len_high))
1376 return -EFAULT;
1377 }
1378 return 0;
1379 }
1380
1381 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1382 const struct iovec __user *, vector, unsigned long, count)
1383 {
1384 if (unlikely(personality(current->personality) == PER_OSF4))
1385 if (osf_fix_iov_len(vector, count))
1386 return -EFAULT;
1387 return sys_readv(fd, vector, count);
1388 }
1389
1390 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1391 const struct iovec __user *, vector, unsigned long, count)
1392 {
1393 if (unlikely(personality(current->personality) == PER_OSF4))
1394 if (osf_fix_iov_len(vector, count))
1395 return -EFAULT;
1396 return sys_writev(fd, vector, count);
1397 }
1398
1399 #endif
1400
1401 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1402 {
1403 int prio = sys_getpriority(which, who);
1404 if (prio >= 0) {
1405 /* Return value is the unbiased priority, i.e. 20 - prio.
1406 This does result in negative return values, so signal
1407 no error */
1408 force_successful_syscall_return();
1409 prio = 20 - prio;
1410 }
1411 return prio;
1412 }
1413
1414 SYSCALL_DEFINE0(getxuid)
1415 {
1416 current_pt_regs()->r20 = sys_geteuid();
1417 return sys_getuid();
1418 }
1419
1420 SYSCALL_DEFINE0(getxgid)
1421 {
1422 current_pt_regs()->r20 = sys_getegid();
1423 return sys_getgid();
1424 }
1425
1426 SYSCALL_DEFINE0(getxpid)
1427 {
1428 current_pt_regs()->r20 = sys_getppid();
1429 return sys_getpid();
1430 }
1431
1432 SYSCALL_DEFINE0(alpha_pipe)
1433 {
1434 int fd[2];
1435 int res = do_pipe_flags(fd, 0);
1436 if (!res) {
1437 /* The return values are in $0 and $20. */
1438 current_pt_regs()->r20 = fd[1];
1439 res = fd[0];
1440 }
1441 return res;
1442 }
1443
1444 SYSCALL_DEFINE1(sethae, unsigned long, val)
1445 {
1446 current_pt_regs()->hae = val;
1447 return 0;
1448 }
Linux kernel - Deliverables
This page took 0.057488 seconds and 4 git commands to generate.