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Merge tag 'chrome-platform-for-linus-4.13' of git://git.kernel.org/pub/scm/linux...
[linux/fpc-iii.git] / arch / alpha / kernel / osf_sys.c
blobdf0d0a5e93535d421910568dc602510249b4928f
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/signal.h>
15 #include <linux/sched/mm.h>
16 #include <linux/sched/task_stack.h>
17 #include <linux/sched/cputime.h>
18 #include <linux/kernel.h>
19 #include <linux/mm.h>
20 #include <linux/smp.h>
21 #include <linux/stddef.h>
22 #include <linux/syscalls.h>
23 #include <linux/unistd.h>
24 #include <linux/ptrace.h>
25 #include <linux/user.h>
26 #include <linux/utsname.h>
27 #include <linux/time.h>
28 #include <linux/timex.h>
29 #include <linux/major.h>
30 #include <linux/stat.h>
31 #include <linux/mman.h>
32 #include <linux/shm.h>
33 #include <linux/poll.h>
34 #include <linux/file.h>
35 #include <linux/types.h>
36 #include <linux/ipc.h>
37 #include <linux/namei.h>
38 #include <linux/uio.h>
39 #include <linux/vfs.h>
40 #include <linux/rcupdate.h>
41 #include <linux/slab.h>
42
43 #include <asm/fpu.h>
44 #include <asm/io.h>
45 #include <linux/uaccess.h>
46 #include <asm/sysinfo.h>
47 #include <asm/thread_info.h>
48 #include <asm/hwrpb.h>
49 #include <asm/processor.h>
50
51 /*
52 * Brk needs to return an error. Still support Linux's brk(0) query idiom,
53 * which OSF programs just shouldn't be doing. We're still not quite
54 * identical to OSF as we don't return 0 on success, but doing otherwise
55 * would require changes to libc. Hopefully this is good enough.
56 */
57 SYSCALL_DEFINE1(osf_brk, unsigned long, brk)
58 {
59 unsigned long retval = sys_brk(brk);
60 if (brk && brk != retval)
61 retval = -ENOMEM;
62 return retval;
63 }
64
65 /*
66 * This is pure guess-work..
67 */
68 SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start,
69 unsigned long, text_len, unsigned long, bss_start,
70 unsigned long, bss_len)
71 {
72 struct mm_struct *mm;
73
74 mm = current->mm;
75 mm->end_code = bss_start + bss_len;
76 mm->start_brk = bss_start + bss_len;
77 mm->brk = bss_start + bss_len;
78 #if 0
79 printk("set_program_attributes(%lx %lx %lx %lx)\n",
80 text_start, text_len, bss_start, bss_len);
81 #endif
82 return 0;
83 }
84
85 /*
86 * OSF/1 directory handling functions...
87 *
88 * The "getdents()" interface is much more sane: the "basep" stuff is
89 * braindamage (it can't really handle filesystems where the directory
90 * offset differences aren't the same as "d_reclen").
91 */
92 #define NAME_OFFSET offsetof (struct osf_dirent, d_name)
93
94 struct osf_dirent {
95 unsigned int d_ino;
96 unsigned short d_reclen;
97 unsigned short d_namlen;
98 char d_name[1];
99 };
100
101 struct osf_dirent_callback {
102 struct dir_context ctx;
103 struct osf_dirent __user *dirent;
104 long __user *basep;
105 unsigned int count;
106 int error;
107 };
108
109 static int
110 osf_filldir(struct dir_context *ctx, const char *name, int namlen,
111 loff_t offset, u64 ino, unsigned int d_type)
112 {
113 struct osf_dirent __user *dirent;
114 struct osf_dirent_callback *buf =
115 container_of(ctx, struct osf_dirent_callback, ctx);
116 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
117 unsigned int d_ino;
118
119 buf->error = -EINVAL; /* only used if we fail */
120 if (reclen > buf->count)
121 return -EINVAL;
122 d_ino = ino;
123 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
124 buf->error = -EOVERFLOW;
125 return -EOVERFLOW;
126 }
127 if (buf->basep) {
128 if (put_user(offset, buf->basep))
129 goto Efault;
130 buf->basep = NULL;
131 }
132 dirent = buf->dirent;
133 if (put_user(d_ino, &dirent->d_ino) ||
134 put_user(namlen, &dirent->d_namlen) ||
135 put_user(reclen, &dirent->d_reclen) ||
136 copy_to_user(dirent->d_name, name, namlen) ||
137 put_user(0, dirent->d_name + namlen))
138 goto Efault;
139 dirent = (void __user *)dirent + reclen;
140 buf->dirent = dirent;
141 buf->count -= reclen;
142 return 0;
143 Efault:
144 buf->error = -EFAULT;
145 return -EFAULT;
146 }
147
148 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
149 struct osf_dirent __user *, dirent, unsigned int, count,
150 long __user *, basep)
151 {
152 int error;
153 struct fd arg = fdget_pos(fd);
154 struct osf_dirent_callback buf = {
155 .ctx.actor = osf_filldir,
156 .dirent = dirent,
157 .basep = basep,
158 .count = count
159 };
160
161 if (!arg.file)
162 return -EBADF;
163
164 error = iterate_dir(arg.file, &buf.ctx);
165 if (error >= 0)
166 error = buf.error;
167 if (count != buf.count)
168 error = count - buf.count;
169
170 fdput_pos(arg);
171 return error;
172 }
173
174 #undef NAME_OFFSET
175
176 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
177 unsigned long, prot, unsigned long, flags, unsigned long, fd,
178 unsigned long, off)
179 {
180 unsigned long ret = -EINVAL;
181
182 #if 0
183 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
184 printk("%s: unimplemented OSF mmap flags %04lx\n",
185 current->comm, flags);
186 #endif
187 if ((off + PAGE_ALIGN(len)) < off)
188 goto out;
189 if (off & ~PAGE_MASK)
190 goto out;
191 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
192 out:
193 return ret;
194 }
195
196 struct osf_stat {
197 int st_dev;
198 int st_pad1;
199 unsigned st_mode;
200 unsigned short st_nlink;
201 short st_nlink_reserved;
202 unsigned st_uid;
203 unsigned st_gid;
204 int st_rdev;
205 int st_ldev;
206 long st_size;
207 int st_pad2;
208 int st_uatime;
209 int st_pad3;
210 int st_umtime;
211 int st_pad4;
212 int st_uctime;
213 int st_pad5;
214 int st_pad6;
215 unsigned st_flags;
216 unsigned st_gen;
217 long st_spare[4];
218 unsigned st_ino;
219 int st_ino_reserved;
220 int st_atime;
221 int st_atime_reserved;
222 int st_mtime;
223 int st_mtime_reserved;
224 int st_ctime;
225 int st_ctime_reserved;
226 long st_blksize;
227 long st_blocks;
228 };
229
230 /*
231 * The OSF/1 statfs structure is much larger, but this should
232 * match the beginning, at least.
233 */
234 struct osf_statfs {
235 short f_type;
236 short f_flags;
237 int f_fsize;
238 int f_bsize;
239 int f_blocks;
240 int f_bfree;
241 int f_bavail;
242 int f_files;
243 int f_ffree;
244 __kernel_fsid_t f_fsid;
245 };
246
247 struct osf_statfs64 {
248 short f_type;
249 short f_flags;
250 int f_pad1;
251 int f_pad2;
252 int f_pad3;
253 int f_pad4;
254 int f_pad5;
255 int f_pad6;
256 int f_pad7;
257 __kernel_fsid_t f_fsid;
258 u_short f_namemax;
259 short f_reserved1;
260 int f_spare[8];
261 char f_pad8[90];
262 char f_pad9[90];
263 long mount_info[10];
264 u_long f_flags2;
265 long f_spare2[14];
266 long f_fsize;
267 long f_bsize;
268 long f_blocks;
269 long f_bfree;
270 long f_bavail;
271 long f_files;
272 long f_ffree;
273 };
274
275 static int
276 linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat)
277 {
278 struct osf_stat tmp = { 0 };
279
280 tmp.st_dev = lstat->dev;
281 tmp.st_mode = lstat->mode;
282 tmp.st_nlink = lstat->nlink;
283 tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid);
284 tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid);
285 tmp.st_rdev = lstat->rdev;
286 tmp.st_ldev = lstat->rdev;
287 tmp.st_size = lstat->size;
288 tmp.st_uatime = lstat->atime.tv_nsec / 1000;
289 tmp.st_umtime = lstat->mtime.tv_nsec / 1000;
290 tmp.st_uctime = lstat->ctime.tv_nsec / 1000;
291 tmp.st_ino = lstat->ino;
292 tmp.st_atime = lstat->atime.tv_sec;
293 tmp.st_mtime = lstat->mtime.tv_sec;
294 tmp.st_ctime = lstat->ctime.tv_sec;
295 tmp.st_blksize = lstat->blksize;
296 tmp.st_blocks = lstat->blocks;
297
298 return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0;
299 }
300
301 static int
302 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
303 unsigned long bufsiz)
304 {
305 struct osf_statfs tmp_stat;
306
307 tmp_stat.f_type = linux_stat->f_type;
308 tmp_stat.f_flags = 0; /* mount flags */
309 tmp_stat.f_fsize = linux_stat->f_frsize;
310 tmp_stat.f_bsize = linux_stat->f_bsize;
311 tmp_stat.f_blocks = linux_stat->f_blocks;
312 tmp_stat.f_bfree = linux_stat->f_bfree;
313 tmp_stat.f_bavail = linux_stat->f_bavail;
314 tmp_stat.f_files = linux_stat->f_files;
315 tmp_stat.f_ffree = linux_stat->f_ffree;
316 tmp_stat.f_fsid = linux_stat->f_fsid;
317 if (bufsiz > sizeof(tmp_stat))
318 bufsiz = sizeof(tmp_stat);
319 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
320 }
321
322 static int
323 linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat,
324 unsigned long bufsiz)
325 {
326 struct osf_statfs64 tmp_stat = { 0 };
327
328 tmp_stat.f_type = linux_stat->f_type;
329 tmp_stat.f_fsize = linux_stat->f_frsize;
330 tmp_stat.f_bsize = linux_stat->f_bsize;
331 tmp_stat.f_blocks = linux_stat->f_blocks;
332 tmp_stat.f_bfree = linux_stat->f_bfree;
333 tmp_stat.f_bavail = linux_stat->f_bavail;
334 tmp_stat.f_files = linux_stat->f_files;
335 tmp_stat.f_ffree = linux_stat->f_ffree;
336 tmp_stat.f_fsid = linux_stat->f_fsid;
337 if (bufsiz > sizeof(tmp_stat))
338 bufsiz = sizeof(tmp_stat);
339 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
340 }
341
342 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
343 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
344 {
345 struct kstatfs linux_stat;
346 int error = user_statfs(pathname, &linux_stat);
347 if (!error)
348 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
349 return error;
350 }
351
352 SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
353 {
354 struct kstat stat;
355 int error;
356
357 error = vfs_stat(name, &stat);
358 if (error)
359 return error;
360
361 return linux_to_osf_stat(&stat, buf);
362 }
363
364 SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf)
365 {
366 struct kstat stat;
367 int error;
368
369 error = vfs_lstat(name, &stat);
370 if (error)
371 return error;
372
373 return linux_to_osf_stat(&stat, buf);
374 }
375
376 SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf)
377 {
378 struct kstat stat;
379 int error;
380
381 error = vfs_fstat(fd, &stat);
382 if (error)
383 return error;
384
385 return linux_to_osf_stat(&stat, buf);
386 }
387
388 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
389 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
390 {
391 struct kstatfs linux_stat;
392 int error = fd_statfs(fd, &linux_stat);
393 if (!error)
394 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
395 return error;
396 }
397
398 SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname,
399 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
400 {
401 struct kstatfs linux_stat;
402 int error = user_statfs(pathname, &linux_stat);
403 if (!error)
404 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
405 return error;
406 }
407
408 SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd,
409 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
410 {
411 struct kstatfs linux_stat;
412 int error = fd_statfs(fd, &linux_stat);
413 if (!error)
414 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
415 return error;
416 }
417
418 /*
419 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
420 *
421 * Although to be frank, neither are the native Linux/i386 ones..
422 */
423 struct ufs_args {
424 char __user *devname;
425 int flags;
426 uid_t exroot;
427 };
428
429 struct cdfs_args {
430 char __user *devname;
431 int flags;
432 uid_t exroot;
433
434 /* This has lots more here, which Linux handles with the option block
435 but I'm too lazy to do the translation into ASCII. */
436 };
437
438 struct procfs_args {
439 char __user *devname;
440 int flags;
441 uid_t exroot;
442 };
443
444 /*
445 * We can't actually handle ufs yet, so we translate UFS mounts to
446 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
447 * layout is so braindead it's a major headache doing it.
448 *
449 * Just how long ago was it written? OTOH our UFS driver may be still
450 * unhappy with OSF UFS. [CHECKME]
451 */
452 static int
453 osf_ufs_mount(const char __user *dirname,
454 struct ufs_args __user *args, int flags)
455 {
456 int retval;
457 struct cdfs_args tmp;
458 struct filename *devname;
459
460 retval = -EFAULT;
461 if (copy_from_user(&tmp, args, sizeof(tmp)))
462 goto out;
463 devname = getname(tmp.devname);
464 retval = PTR_ERR(devname);
465 if (IS_ERR(devname))
466 goto out;
467 retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
468 putname(devname);
469 out:
470 return retval;
471 }
472
473 static int
474 osf_cdfs_mount(const char __user *dirname,
475 struct cdfs_args __user *args, int flags)
476 {
477 int retval;
478 struct cdfs_args tmp;
479 struct filename *devname;
480
481 retval = -EFAULT;
482 if (copy_from_user(&tmp, args, sizeof(tmp)))
483 goto out;
484 devname = getname(tmp.devname);
485 retval = PTR_ERR(devname);
486 if (IS_ERR(devname))
487 goto out;
488 retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
489 putname(devname);
490 out:
491 return retval;
492 }
493
494 static int
495 osf_procfs_mount(const char __user *dirname,
496 struct procfs_args __user *args, int flags)
497 {
498 struct procfs_args tmp;
499
500 if (copy_from_user(&tmp, args, sizeof(tmp)))
501 return -EFAULT;
502
503 return do_mount("", dirname, "proc", flags, NULL);
504 }
505
506 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
507 int, flag, void __user *, data)
508 {
509 int retval;
510
511 switch (typenr) {
512 case 1:
513 retval = osf_ufs_mount(path, data, flag);
514 break;
515 case 6:
516 retval = osf_cdfs_mount(path, data, flag);
517 break;
518 case 9:
519 retval = osf_procfs_mount(path, data, flag);
520 break;
521 default:
522 retval = -EINVAL;
523 printk("osf_mount(%ld, %x)\n", typenr, flag);
524 }
525
526 return retval;
527 }
528
529 SYSCALL_DEFINE1(osf_utsname, char __user *, name)
530 {
531 int error;
532
533 down_read(&uts_sem);
534 error = -EFAULT;
535 if (copy_to_user(name + 0, utsname()->sysname, 32))
536 goto out;
537 if (copy_to_user(name + 32, utsname()->nodename, 32))
538 goto out;
539 if (copy_to_user(name + 64, utsname()->release, 32))
540 goto out;
541 if (copy_to_user(name + 96, utsname()->version, 32))
542 goto out;
543 if (copy_to_user(name + 128, utsname()->machine, 32))
544 goto out;
545
546 error = 0;
547 out:
548 up_read(&uts_sem);
549 return error;
550 }
551
552 SYSCALL_DEFINE0(getpagesize)
553 {
554 return PAGE_SIZE;
555 }
556
557 SYSCALL_DEFINE0(getdtablesize)
558 {
559 return sysctl_nr_open;
560 }
561
562 /*
563 * For compatibility with OSF/1 only. Use utsname(2) instead.
564 */
565 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
566 {
567 int len, err = 0;
568 char *kname;
569
570 if (namelen > 32)
571 namelen = 32;
572
573 down_read(&uts_sem);
574 kname = utsname()->domainname;
575 len = strnlen(kname, namelen);
576 if (copy_to_user(name, kname, min(len + 1, namelen)))
577 err = -EFAULT;
578 up_read(&uts_sem);
579
580 return err;
581 }
582
583 /*
584 * The following stuff should move into a header file should it ever
585 * be labeled "officially supported." Right now, there is just enough
586 * support to avoid applications (such as tar) printing error
587 * messages. The attributes are not really implemented.
588 */
589
590 /*
591 * Values for Property list entry flag
592 */
593 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
594 by default */
595 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
596 #define PLE_FLAG_ALL -1 /* All flag value */
597
598 struct proplistname_args {
599 unsigned int pl_mask;
600 unsigned int pl_numnames;
601 char **pl_names;
602 };
603
604 union pl_args {
605 struct setargs {
606 char __user *path;
607 long follow;
608 long nbytes;
609 char __user *buf;
610 } set;
611 struct fsetargs {
612 long fd;
613 long nbytes;
614 char __user *buf;
615 } fset;
616 struct getargs {
617 char __user *path;
618 long follow;
619 struct proplistname_args __user *name_args;
620 long nbytes;
621 char __user *buf;
622 int __user *min_buf_size;
623 } get;
624 struct fgetargs {
625 long fd;
626 struct proplistname_args __user *name_args;
627 long nbytes;
628 char __user *buf;
629 int __user *min_buf_size;
630 } fget;
631 struct delargs {
632 char __user *path;
633 long follow;
634 struct proplistname_args __user *name_args;
635 } del;
636 struct fdelargs {
637 long fd;
638 struct proplistname_args __user *name_args;
639 } fdel;
640 };
641
642 enum pl_code {
643 PL_SET = 1, PL_FSET = 2,
644 PL_GET = 3, PL_FGET = 4,
645 PL_DEL = 5, PL_FDEL = 6
646 };
647
648 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
649 union pl_args __user *, args)
650 {
651 long error;
652 int __user *min_buf_size_ptr;
653
654 switch (code) {
655 case PL_SET:
656 if (get_user(error, &args->set.nbytes))
657 error = -EFAULT;
658 break;
659 case PL_FSET:
660 if (get_user(error, &args->fset.nbytes))
661 error = -EFAULT;
662 break;
663 case PL_GET:
664 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
665 if (error)
666 break;
667 error = put_user(0, min_buf_size_ptr);
668 break;
669 case PL_FGET:
670 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
671 if (error)
672 break;
673 error = put_user(0, min_buf_size_ptr);
674 break;
675 case PL_DEL:
676 case PL_FDEL:
677 error = 0;
678 break;
679 default:
680 error = -EOPNOTSUPP;
681 break;
682 };
683 return error;
684 }
685
686 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
687 struct sigstack __user *, uoss)
688 {
689 unsigned long usp = rdusp();
690 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
691 unsigned long oss_os = on_sig_stack(usp);
692 int error;
693
694 if (uss) {
695 void __user *ss_sp;
696
697 error = -EFAULT;
698 if (get_user(ss_sp, &uss->ss_sp))
699 goto out;
700
701 /* If the current stack was set with sigaltstack, don't
702 swap stacks while we are on it. */
703 error = -EPERM;
704 if (current->sas_ss_sp && on_sig_stack(usp))
705 goto out;
706
707 /* Since we don't know the extent of the stack, and we don't
708 track onstack-ness, but rather calculate it, we must
709 presume a size. Ho hum this interface is lossy. */
710 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
711 current->sas_ss_size = SIGSTKSZ;
712 }
713
714 if (uoss) {
715 error = -EFAULT;
716 if (put_user(oss_sp, &uoss->ss_sp) ||
717 put_user(oss_os, &uoss->ss_onstack))
718 goto out;
719 }
720
721 error = 0;
722 out:
723 return error;
724 }
725
726 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
727 {
728 const char *sysinfo_table[] = {
729 utsname()->sysname,
730 utsname()->nodename,
731 utsname()->release,
732 utsname()->version,
733 utsname()->machine,
734 "alpha", /* instruction set architecture */
735 "dummy", /* hardware serial number */
736 "dummy", /* hardware manufacturer */
737 "dummy", /* secure RPC domain */
738 };
739 unsigned long offset;
740 const char *res;
741 long len, err = -EINVAL;
742
743 offset = command-1;
744 if (offset >= ARRAY_SIZE(sysinfo_table)) {
745 /* Digital UNIX has a few unpublished interfaces here */
746 printk("sysinfo(%d)", command);
747 goto out;
748 }
749
750 down_read(&uts_sem);
751 res = sysinfo_table[offset];
752 len = strlen(res)+1;
753 if ((unsigned long)len > (unsigned long)count)
754 len = count;
755 if (copy_to_user(buf, res, len))
756 err = -EFAULT;
757 else
758 err = 0;
759 up_read(&uts_sem);
760 out:
761 return err;
762 }
763
764 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
765 unsigned long, nbytes, int __user *, start, void __user *, arg)
766 {
767 unsigned long w;
768 struct percpu_struct *cpu;
769
770 switch (op) {
771 case GSI_IEEE_FP_CONTROL:
772 /* Return current software fp control & status bits. */
773 /* Note that DU doesn't verify available space here. */
774
775 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
776 w = swcr_update_status(w, rdfpcr());
777 if (put_user(w, (unsigned long __user *) buffer))
778 return -EFAULT;
779 return 0;
780
781 case GSI_IEEE_STATE_AT_SIGNAL:
782 /*
783 * Not sure anybody will ever use this weird stuff. These
784 * ops can be used (under OSF/1) to set the fpcr that should
785 * be used when a signal handler starts executing.
786 */
787 break;
788
789 case GSI_UACPROC:
790 if (nbytes < sizeof(unsigned int))
791 return -EINVAL;
792 w = current_thread_info()->status & UAC_BITMASK;
793 if (put_user(w, (unsigned int __user *)buffer))
794 return -EFAULT;
795 return 1;
796
797 case GSI_PROC_TYPE:
798 if (nbytes < sizeof(unsigned long))
799 return -EINVAL;
800 cpu = (struct percpu_struct*)
801 ((char*)hwrpb + hwrpb->processor_offset);
802 w = cpu->type;
803 if (put_user(w, (unsigned long __user*)buffer))
804 return -EFAULT;
805 return 1;
806
807 case GSI_GET_HWRPB:
808 if (nbytes > sizeof(*hwrpb))
809 return -EINVAL;
810 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
811 return -EFAULT;
812 return 1;
813
814 default:
815 break;
816 }
817
818 return -EOPNOTSUPP;
819 }
820
821 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
822 unsigned long, nbytes, int __user *, start, void __user *, arg)
823 {
824 switch (op) {
825 case SSI_IEEE_FP_CONTROL: {
826 unsigned long swcr, fpcr;
827 unsigned int *state;
828
829 /*
830 * Alpha Architecture Handbook 4.7.7.3:
831 * To be fully IEEE compiant, we must track the current IEEE
832 * exception state in software, because spurious bits can be
833 * set in the trap shadow of a software-complete insn.
834 */
835
836 if (get_user(swcr, (unsigned long __user *)buffer))
837 return -EFAULT;
838 state = &current_thread_info()->ieee_state;
839
840 /* Update softare trap enable bits. */
841 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
842
843 /* Update the real fpcr. */
844 fpcr = rdfpcr() & FPCR_DYN_MASK;
845 fpcr |= ieee_swcr_to_fpcr(swcr);
846 wrfpcr(fpcr);
847
848 return 0;
849 }
850
851 case SSI_IEEE_RAISE_EXCEPTION: {
852 unsigned long exc, swcr, fpcr, fex;
853 unsigned int *state;
854
855 if (get_user(exc, (unsigned long __user *)buffer))
856 return -EFAULT;
857 state = &current_thread_info()->ieee_state;
858 exc &= IEEE_STATUS_MASK;
859
860 /* Update softare trap enable bits. */
861 swcr = (*state & IEEE_SW_MASK) | exc;
862 *state |= exc;
863
864 /* Update the real fpcr. */
865 fpcr = rdfpcr();
866 fpcr |= ieee_swcr_to_fpcr(swcr);
867 wrfpcr(fpcr);
868
869 /* If any exceptions set by this call, and are unmasked,
870 send a signal. Old exceptions are not signaled. */
871 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
872 if (fex) {
873 siginfo_t info;
874 int si_code = 0;
875
876 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
877 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
878 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
879 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
880 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
881 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
882
883 info.si_signo = SIGFPE;
884 info.si_errno = 0;
885 info.si_code = si_code;
886 info.si_addr = NULL; /* FIXME */
887 send_sig_info(SIGFPE, &info, current);
888 }
889 return 0;
890 }
891
892 case SSI_IEEE_STATE_AT_SIGNAL:
893 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
894 /*
895 * Not sure anybody will ever use this weird stuff. These
896 * ops can be used (under OSF/1) to set the fpcr that should
897 * be used when a signal handler starts executing.
898 */
899 break;
900
901 case SSI_NVPAIRS: {
902 unsigned __user *p = buffer;
903 unsigned i;
904
905 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
906 unsigned v, w, status;
907
908 if (get_user(v, p) || get_user(w, p + 1))
909 return -EFAULT;
910 switch (v) {
911 case SSIN_UACPROC:
912 w &= UAC_BITMASK;
913 status = current_thread_info()->status;
914 status = (status & ~UAC_BITMASK) | w;
915 current_thread_info()->status = status;
916 break;
917
918 default:
919 return -EOPNOTSUPP;
920 }
921 }
922 return 0;
923 }
924
925 case SSI_LMF:
926 return 0;
927
928 default:
929 break;
930 }
931
932 return -EOPNOTSUPP;
933 }
934
935 /* Translations due to the fact that OSF's time_t is an int. Which
936 affects all sorts of things, like timeval and itimerval. */
937
938 extern struct timezone sys_tz;
939
940 struct timeval32
941 {
942 int tv_sec, tv_usec;
943 };
944
945 struct itimerval32
946 {
947 struct timeval32 it_interval;
948 struct timeval32 it_value;
949 };
950
951 static inline long
952 get_tv32(struct timeval *o, struct timeval32 __user *i)
953 {
954 struct timeval32 tv;
955 if (copy_from_user(&tv, i, sizeof(struct timeval32)))
956 return -EFAULT;
957 o->tv_sec = tv.tv_sec;
958 o->tv_usec = tv.tv_usec;
959 return 0;
960 }
961
962 static inline long
963 put_tv32(struct timeval32 __user *o, struct timeval *i)
964 {
965 return copy_to_user(o, &(struct timeval32){
966 .tv_sec = o->tv_sec,
967 .tv_usec = o->tv_usec},
968 sizeof(struct timeval32));
969 }
970
971 static inline long
972 get_it32(struct itimerval *o, struct itimerval32 __user *i)
973 {
974 struct itimerval32 itv;
975 if (copy_from_user(&itv, i, sizeof(struct itimerval32)))
976 return -EFAULT;
977 o->it_interval.tv_sec = itv.it_interval.tv_sec;
978 o->it_interval.tv_usec = itv.it_interval.tv_usec;
979 o->it_value.tv_sec = itv.it_value.tv_sec;
980 o->it_value.tv_usec = itv.it_value.tv_usec;
981 return 0;
982 }
983
984 static inline long
985 put_it32(struct itimerval32 __user *o, struct itimerval *i)
986 {
987 return copy_to_user(o, &(struct itimerval32){
988 .it_interval.tv_sec = o->it_interval.tv_sec,
989 .it_interval.tv_usec = o->it_interval.tv_usec,
990 .it_value.tv_sec = o->it_value.tv_sec,
991 .it_value.tv_usec = o->it_value.tv_usec},
992 sizeof(struct itimerval32));
993 }
994
995 static inline void
996 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
997 {
998 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
999 value->tv_sec = jiffies / HZ;
1000 }
1001
1002 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
1003 struct timezone __user *, tz)
1004 {
1005 if (tv) {
1006 struct timeval ktv;
1007 do_gettimeofday(&ktv);
1008 if (put_tv32(tv, &ktv))
1009 return -EFAULT;
1010 }
1011 if (tz) {
1012 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
1013 return -EFAULT;
1014 }
1015 return 0;
1016 }
1017
1018 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
1019 struct timezone __user *, tz)
1020 {
1021 struct timespec64 kts64;
1022 struct timespec kts;
1023 struct timezone ktz;
1024
1025 if (tv) {
1026 if (get_tv32((struct timeval *)&kts, tv))
1027 return -EFAULT;
1028 kts.tv_nsec *= 1000;
1029 kts64 = timespec_to_timespec64(kts);
1030 }
1031 if (tz) {
1032 if (copy_from_user(&ktz, tz, sizeof(*tz)))
1033 return -EFAULT;
1034 }
1035
1036 return do_sys_settimeofday64(tv ? &kts64 : NULL, tz ? &ktz : NULL);
1037 }
1038
1039 asmlinkage long sys_ni_posix_timers(void);
1040
1041 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
1042 {
1043 struct itimerval kit;
1044 int error;
1045
1046 if (!IS_ENABLED(CONFIG_POSIX_TIMERS))
1047 return sys_ni_posix_timers();
1048
1049 error = do_getitimer(which, &kit);
1050 if (!error && put_it32(it, &kit))
1051 error = -EFAULT;
1052
1053 return error;
1054 }
1055
1056 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
1057 struct itimerval32 __user *, out)
1058 {
1059 struct itimerval kin, kout;
1060 int error;
1061
1062 if (!IS_ENABLED(CONFIG_POSIX_TIMERS))
1063 return sys_ni_posix_timers();
1064
1065 if (in) {
1066 if (get_it32(&kin, in))
1067 return -EFAULT;
1068 } else
1069 memset(&kin, 0, sizeof(kin));
1070
1071 error = do_setitimer(which, &kin, out ? &kout : NULL);
1072 if (error || !out)
1073 return error;
1074
1075 if (put_it32(out, &kout))
1076 return -EFAULT;
1077
1078 return 0;
1079
1080 }
1081
1082 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1083 struct timeval32 __user *, tvs)
1084 {
1085 struct timespec tv[2];
1086
1087 if (tvs) {
1088 struct timeval ktvs[2];
1089 if (get_tv32(&ktvs[0], &tvs[0]) ||
1090 get_tv32(&ktvs[1], &tvs[1]))
1091 return -EFAULT;
1092
1093 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
1094 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
1095 return -EINVAL;
1096
1097 tv[0].tv_sec = ktvs[0].tv_sec;
1098 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
1099 tv[1].tv_sec = ktvs[1].tv_sec;
1100 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
1101 }
1102
1103 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1104 }
1105
1106 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1107 fd_set __user *, exp, struct timeval32 __user *, tvp)
1108 {
1109 struct timespec end_time, *to = NULL;
1110 if (tvp) {
1111 struct timeval tv;
1112 to = &end_time;
1113
1114 if (get_tv32(&tv, tvp))
1115 return -EFAULT;
1116
1117 if (tv.tv_sec < 0 || tv.tv_usec < 0)
1118 return -EINVAL;
1119
1120 if (poll_select_set_timeout(to, tv.tv_sec,
1121 tv.tv_usec * NSEC_PER_USEC))
1122 return -EINVAL;
1123
1124 }
1125
1126 /* OSF does not copy back the remaining time. */
1127 return core_sys_select(n, inp, outp, exp, to);
1128 }
1129
1130 struct rusage32 {
1131 struct timeval32 ru_utime; /* user time used */
1132 struct timeval32 ru_stime; /* system time used */
1133 long ru_maxrss; /* maximum resident set size */
1134 long ru_ixrss; /* integral shared memory size */
1135 long ru_idrss; /* integral unshared data size */
1136 long ru_isrss; /* integral unshared stack size */
1137 long ru_minflt; /* page reclaims */
1138 long ru_majflt; /* page faults */
1139 long ru_nswap; /* swaps */
1140 long ru_inblock; /* block input operations */
1141 long ru_oublock; /* block output operations */
1142 long ru_msgsnd; /* messages sent */
1143 long ru_msgrcv; /* messages received */
1144 long ru_nsignals; /* signals received */
1145 long ru_nvcsw; /* voluntary context switches */
1146 long ru_nivcsw; /* involuntary " */
1147 };
1148
1149 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1150 {
1151 struct rusage32 r;
1152 u64 utime, stime;
1153 unsigned long utime_jiffies, stime_jiffies;
1154
1155 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1156 return -EINVAL;
1157
1158 memset(&r, 0, sizeof(r));
1159 switch (who) {
1160 case RUSAGE_SELF:
1161 task_cputime(current, &utime, &stime);
1162 utime_jiffies = nsecs_to_jiffies(utime);
1163 stime_jiffies = nsecs_to_jiffies(stime);
1164 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1165 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1166 r.ru_minflt = current->min_flt;
1167 r.ru_majflt = current->maj_flt;
1168 break;
1169 case RUSAGE_CHILDREN:
1170 utime_jiffies = nsecs_to_jiffies(current->signal->cutime);
1171 stime_jiffies = nsecs_to_jiffies(current->signal->cstime);
1172 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1173 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1174 r.ru_minflt = current->signal->cmin_flt;
1175 r.ru_majflt = current->signal->cmaj_flt;
1176 break;
1177 }
1178
1179 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1180 }
1181
1182 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1183 struct rusage32 __user *, ur)
1184 {
1185 unsigned int status = 0;
1186 struct rusage r;
1187 long err = kernel_wait4(pid, &status, options, &r);
1188 if (err <= 0)
1189 return err;
1190 if (put_user(status, ustatus))
1191 return -EFAULT;
1192 if (!ur)
1193 return err;
1194 if (put_tv32(&ur->ru_utime, &r.ru_utime))
1195 return -EFAULT;
1196 if (put_tv32(&ur->ru_stime, &r.ru_stime))
1197 return -EFAULT;
1198 if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss,
1199 sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss)))
1200 return -EFAULT;
1201 return err;
1202 }
1203
1204 /*
1205 * I don't know what the parameters are: the first one
1206 * seems to be a timeval pointer, and I suspect the second
1207 * one is the time remaining.. Ho humm.. No documentation.
1208 */
1209 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1210 struct timeval32 __user *, remain)
1211 {
1212 struct timeval tmp;
1213 unsigned long ticks;
1214
1215 if (get_tv32(&tmp, sleep))
1216 goto fault;
1217
1218 ticks = timeval_to_jiffies(&tmp);
1219
1220 ticks = schedule_timeout_interruptible(ticks);
1221
1222 if (remain) {
1223 jiffies_to_timeval(ticks, &tmp);
1224 if (put_tv32(remain, &tmp))
1225 goto fault;
1226 }
1227
1228 return 0;
1229 fault:
1230 return -EFAULT;
1231 }
1232
1233
1234 struct timex32 {
1235 unsigned int modes; /* mode selector */
1236 long offset; /* time offset (usec) */
1237 long freq; /* frequency offset (scaled ppm) */
1238 long maxerror; /* maximum error (usec) */
1239 long esterror; /* estimated error (usec) */
1240 int status; /* clock command/status */
1241 long constant; /* pll time constant */
1242 long precision; /* clock precision (usec) (read only) */
1243 long tolerance; /* clock frequency tolerance (ppm)
1244 * (read only)
1245 */
1246 struct timeval32 time; /* (read only) */
1247 long tick; /* (modified) usecs between clock ticks */
1248
1249 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1250 long jitter; /* pps jitter (us) (ro) */
1251 int shift; /* interval duration (s) (shift) (ro) */
1252 long stabil; /* pps stability (scaled ppm) (ro) */
1253 long jitcnt; /* jitter limit exceeded (ro) */
1254 long calcnt; /* calibration intervals (ro) */
1255 long errcnt; /* calibration errors (ro) */
1256 long stbcnt; /* stability limit exceeded (ro) */
1257
1258 int :32; int :32; int :32; int :32;
1259 int :32; int :32; int :32; int :32;
1260 int :32; int :32; int :32; int :32;
1261 };
1262
1263 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1264 {
1265 struct timex txc;
1266 int ret;
1267
1268 /* copy relevant bits of struct timex. */
1269 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1270 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1271 offsetof(struct timex32, tick)))
1272 return -EFAULT;
1273
1274 ret = do_adjtimex(&txc);
1275 if (ret < 0)
1276 return ret;
1277
1278 /* copy back to timex32 */
1279 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1280 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1281 offsetof(struct timex32, tick))) ||
1282 (put_tv32(&txc_p->time, &txc.time)))
1283 return -EFAULT;
1284
1285 return ret;
1286 }
1287
1288 /* Get an address range which is currently unmapped. Similar to the
1289 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1290
1291 static unsigned long
1292 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1293 unsigned long limit)
1294 {
1295 struct vm_unmapped_area_info info;
1296
1297 info.flags = 0;
1298 info.length = len;
1299 info.low_limit = addr;
1300 info.high_limit = limit;
1301 info.align_mask = 0;
1302 info.align_offset = 0;
1303 return vm_unmapped_area(&info);
1304 }
1305
1306 unsigned long
1307 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1308 unsigned long len, unsigned long pgoff,
1309 unsigned long flags)
1310 {
1311 unsigned long limit;
1312
1313 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1314 if (current->personality & ADDR_LIMIT_32BIT)
1315 limit = 0x80000000;
1316 else
1317 limit = TASK_SIZE;
1318
1319 if (len > limit)
1320 return -ENOMEM;
1321
1322 if (flags & MAP_FIXED)
1323 return addr;
1324
1325 /* First, see if the given suggestion fits.
1326
1327 The OSF/1 loader (/sbin/loader) relies on us returning an
1328 address larger than the requested if one exists, which is
1329 a terribly broken way to program.
1330
1331 That said, I can see the use in being able to suggest not
1332 merely specific addresses, but regions of memory -- perhaps
1333 this feature should be incorporated into all ports? */
1334
1335 if (addr) {
1336 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1337 if (addr != (unsigned long) -ENOMEM)
1338 return addr;
1339 }
1340
1341 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1342 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1343 len, limit);
1344 if (addr != (unsigned long) -ENOMEM)
1345 return addr;
1346
1347 /* Finally, try allocating in low memory. */
1348 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1349
1350 return addr;
1351 }
1352
1353 #ifdef CONFIG_OSF4_COMPAT
1354
1355 /* Clear top 32 bits of iov_len in the user's buffer for
1356 compatibility with old versions of OSF/1 where iov_len
1357 was defined as int. */
1358 static int
1359 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1360 {
1361 unsigned long i;
1362
1363 for (i = 0 ; i < count ; i++) {
1364 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1365
1366 if (put_user(0, iov_len_high))
1367 return -EFAULT;
1368 }
1369 return 0;
1370 }
1371
1372 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1373 const struct iovec __user *, vector, unsigned long, count)
1374 {
1375 if (unlikely(personality(current->personality) == PER_OSF4))
1376 if (osf_fix_iov_len(vector, count))
1377 return -EFAULT;
1378 return sys_readv(fd, vector, count);
1379 }
1380
1381 SYSCALL_DEFINE3(osf_writev, 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_writev(fd, vector, count);
1388 }
1389
1390 #endif
1391
1392 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1393 {
1394 int prio = sys_getpriority(which, who);
1395 if (prio >= 0) {
1396 /* Return value is the unbiased priority, i.e. 20 - prio.
1397 This does result in negative return values, so signal
1398 no error */
1399 force_successful_syscall_return();
1400 prio = 20 - prio;
1401 }
1402 return prio;
1403 }
1404
1405 SYSCALL_DEFINE0(getxuid)
1406 {
1407 current_pt_regs()->r20 = sys_geteuid();
1408 return sys_getuid();
1409 }
1410
1411 SYSCALL_DEFINE0(getxgid)
1412 {
1413 current_pt_regs()->r20 = sys_getegid();
1414 return sys_getgid();
1415 }
1416
1417 SYSCALL_DEFINE0(getxpid)
1418 {
1419 current_pt_regs()->r20 = sys_getppid();
1420 return sys_getpid();
1421 }
1422
1423 SYSCALL_DEFINE0(alpha_pipe)
1424 {
1425 int fd[2];
1426 int res = do_pipe_flags(fd, 0);
1427 if (!res) {
1428 /* The return values are in $0 and $20. */
1429 current_pt_regs()->r20 = fd[1];
1430 res = fd[0];
1431 }
1432 return res;
1433 }
1434
1435 SYSCALL_DEFINE1(sethae, unsigned long, val)
1436 {
1437 current_pt_regs()->hae = val;
1438 return 0;
1439 }
Linux with added FPC-III support