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Linux 4.18.10
[linux/fpc-iii.git] / arch / alpha / kernel / osf_sys.c
blobcff52d8ffdb12656070a4c5e73f5dad376cd9f86
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * linux/arch/alpha/kernel/osf_sys.c
4 *
5 * Copyright (C) 1995 Linus Torvalds
6 */
7
8 /*
9 * This file handles some of the stranger OSF/1 system call interfaces.
10 * Some of the system calls expect a non-C calling standard, others have
11 * special parameter blocks..
12 */
13
14 #include <linux/errno.h>
15 #include <linux/sched/signal.h>
16 #include <linux/sched/mm.h>
17 #include <linux/sched/task_stack.h>
18 #include <linux/sched/cputime.h>
19 #include <linux/kernel.h>
20 #include <linux/mm.h>
21 #include <linux/smp.h>
22 #include <linux/stddef.h>
23 #include <linux/syscalls.h>
24 #include <linux/unistd.h>
25 #include <linux/ptrace.h>
26 #include <linux/user.h>
27 #include <linux/utsname.h>
28 #include <linux/time.h>
29 #include <linux/timex.h>
30 #include <linux/major.h>
31 #include <linux/stat.h>
32 #include <linux/mman.h>
33 #include <linux/shm.h>
34 #include <linux/poll.h>
35 #include <linux/file.h>
36 #include <linux/types.h>
37 #include <linux/ipc.h>
38 #include <linux/namei.h>
39 #include <linux/uio.h>
40 #include <linux/vfs.h>
41 #include <linux/rcupdate.h>
42 #include <linux/slab.h>
43
44 #include <asm/fpu.h>
45 #include <asm/io.h>
46 #include <linux/uaccess.h>
47 #include <asm/sysinfo.h>
48 #include <asm/thread_info.h>
49 #include <asm/hwrpb.h>
50 #include <asm/processor.h>
51
52 /*
53 * Brk needs to return an error. Still support Linux's brk(0) query idiom,
54 * which OSF programs just shouldn't be doing. We're still not quite
55 * identical to OSF as we don't return 0 on success, but doing otherwise
56 * would require changes to libc. Hopefully this is good enough.
57 */
58 SYSCALL_DEFINE1(osf_brk, unsigned long, brk)
59 {
60 unsigned long retval = sys_brk(brk);
61 if (brk && brk != retval)
62 retval = -ENOMEM;
63 return retval;
64 }
65
66 /*
67 * This is pure guess-work..
68 */
69 SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start,
70 unsigned long, text_len, unsigned long, bss_start,
71 unsigned long, bss_len)
72 {
73 struct mm_struct *mm;
74
75 mm = current->mm;
76 mm->end_code = bss_start + bss_len;
77 mm->start_brk = bss_start + bss_len;
78 mm->brk = bss_start + bss_len;
79 #if 0
80 printk("set_program_attributes(%lx %lx %lx %lx)\n",
81 text_start, text_len, bss_start, bss_len);
82 #endif
83 return 0;
84 }
85
86 /*
87 * OSF/1 directory handling functions...
88 *
89 * The "getdents()" interface is much more sane: the "basep" stuff is
90 * braindamage (it can't really handle filesystems where the directory
91 * offset differences aren't the same as "d_reclen").
92 */
93 #define NAME_OFFSET offsetof (struct osf_dirent, d_name)
94
95 struct osf_dirent {
96 unsigned int d_ino;
97 unsigned short d_reclen;
98 unsigned short d_namlen;
99 char d_name[1];
100 };
101
102 struct osf_dirent_callback {
103 struct dir_context ctx;
104 struct osf_dirent __user *dirent;
105 long __user *basep;
106 unsigned int count;
107 int error;
108 };
109
110 static int
111 osf_filldir(struct dir_context *ctx, const char *name, int namlen,
112 loff_t offset, u64 ino, unsigned int d_type)
113 {
114 struct osf_dirent __user *dirent;
115 struct osf_dirent_callback *buf =
116 container_of(ctx, struct osf_dirent_callback, ctx);
117 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
118 unsigned int d_ino;
119
120 buf->error = -EINVAL; /* only used if we fail */
121 if (reclen > buf->count)
122 return -EINVAL;
123 d_ino = ino;
124 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
125 buf->error = -EOVERFLOW;
126 return -EOVERFLOW;
127 }
128 if (buf->basep) {
129 if (put_user(offset, buf->basep))
130 goto Efault;
131 buf->basep = NULL;
132 }
133 dirent = buf->dirent;
134 if (put_user(d_ino, &dirent->d_ino) ||
135 put_user(namlen, &dirent->d_namlen) ||
136 put_user(reclen, &dirent->d_reclen) ||
137 copy_to_user(dirent->d_name, name, namlen) ||
138 put_user(0, dirent->d_name + namlen))
139 goto Efault;
140 dirent = (void __user *)dirent + reclen;
141 buf->dirent = dirent;
142 buf->count -= reclen;
143 return 0;
144 Efault:
145 buf->error = -EFAULT;
146 return -EFAULT;
147 }
148
149 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
150 struct osf_dirent __user *, dirent, unsigned int, count,
151 long __user *, basep)
152 {
153 int error;
154 struct fd arg = fdget_pos(fd);
155 struct osf_dirent_callback buf = {
156 .ctx.actor = osf_filldir,
157 .dirent = dirent,
158 .basep = basep,
159 .count = count
160 };
161
162 if (!arg.file)
163 return -EBADF;
164
165 error = iterate_dir(arg.file, &buf.ctx);
166 if (error >= 0)
167 error = buf.error;
168 if (count != buf.count)
169 error = count - buf.count;
170
171 fdput_pos(arg);
172 return error;
173 }
174
175 #undef NAME_OFFSET
176
177 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
178 unsigned long, prot, unsigned long, flags, unsigned long, fd,
179 unsigned long, off)
180 {
181 unsigned long ret = -EINVAL;
182
183 #if 0
184 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
185 printk("%s: unimplemented OSF mmap flags %04lx\n",
186 current->comm, flags);
187 #endif
188 if ((off + PAGE_ALIGN(len)) < off)
189 goto out;
190 if (off & ~PAGE_MASK)
191 goto out;
192 ret = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
193 out:
194 return ret;
195 }
196
197 struct osf_stat {
198 int st_dev;
199 int st_pad1;
200 unsigned st_mode;
201 unsigned short st_nlink;
202 short st_nlink_reserved;
203 unsigned st_uid;
204 unsigned st_gid;
205 int st_rdev;
206 int st_ldev;
207 long st_size;
208 int st_pad2;
209 int st_uatime;
210 int st_pad3;
211 int st_umtime;
212 int st_pad4;
213 int st_uctime;
214 int st_pad5;
215 int st_pad6;
216 unsigned st_flags;
217 unsigned st_gen;
218 long st_spare[4];
219 unsigned st_ino;
220 int st_ino_reserved;
221 int st_atime;
222 int st_atime_reserved;
223 int st_mtime;
224 int st_mtime_reserved;
225 int st_ctime;
226 int st_ctime_reserved;
227 long st_blksize;
228 long st_blocks;
229 };
230
231 /*
232 * The OSF/1 statfs structure is much larger, but this should
233 * match the beginning, at least.
234 */
235 struct osf_statfs {
236 short f_type;
237 short f_flags;
238 int f_fsize;
239 int f_bsize;
240 int f_blocks;
241 int f_bfree;
242 int f_bavail;
243 int f_files;
244 int f_ffree;
245 __kernel_fsid_t f_fsid;
246 };
247
248 struct osf_statfs64 {
249 short f_type;
250 short f_flags;
251 int f_pad1;
252 int f_pad2;
253 int f_pad3;
254 int f_pad4;
255 int f_pad5;
256 int f_pad6;
257 int f_pad7;
258 __kernel_fsid_t f_fsid;
259 u_short f_namemax;
260 short f_reserved1;
261 int f_spare[8];
262 char f_pad8[90];
263 char f_pad9[90];
264 long mount_info[10];
265 u_long f_flags2;
266 long f_spare2[14];
267 long f_fsize;
268 long f_bsize;
269 long f_blocks;
270 long f_bfree;
271 long f_bavail;
272 long f_files;
273 long f_ffree;
274 };
275
276 static int
277 linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat)
278 {
279 struct osf_stat tmp = { 0 };
280
281 tmp.st_dev = lstat->dev;
282 tmp.st_mode = lstat->mode;
283 tmp.st_nlink = lstat->nlink;
284 tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid);
285 tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid);
286 tmp.st_rdev = lstat->rdev;
287 tmp.st_ldev = lstat->rdev;
288 tmp.st_size = lstat->size;
289 tmp.st_uatime = lstat->atime.tv_nsec / 1000;
290 tmp.st_umtime = lstat->mtime.tv_nsec / 1000;
291 tmp.st_uctime = lstat->ctime.tv_nsec / 1000;
292 tmp.st_ino = lstat->ino;
293 tmp.st_atime = lstat->atime.tv_sec;
294 tmp.st_mtime = lstat->mtime.tv_sec;
295 tmp.st_ctime = lstat->ctime.tv_sec;
296 tmp.st_blksize = lstat->blksize;
297 tmp.st_blocks = lstat->blocks;
298
299 return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0;
300 }
301
302 static int
303 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
304 unsigned long bufsiz)
305 {
306 struct osf_statfs tmp_stat;
307
308 tmp_stat.f_type = linux_stat->f_type;
309 tmp_stat.f_flags = 0; /* mount flags */
310 tmp_stat.f_fsize = linux_stat->f_frsize;
311 tmp_stat.f_bsize = linux_stat->f_bsize;
312 tmp_stat.f_blocks = linux_stat->f_blocks;
313 tmp_stat.f_bfree = linux_stat->f_bfree;
314 tmp_stat.f_bavail = linux_stat->f_bavail;
315 tmp_stat.f_files = linux_stat->f_files;
316 tmp_stat.f_ffree = linux_stat->f_ffree;
317 tmp_stat.f_fsid = linux_stat->f_fsid;
318 if (bufsiz > sizeof(tmp_stat))
319 bufsiz = sizeof(tmp_stat);
320 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
321 }
322
323 static int
324 linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat,
325 unsigned long bufsiz)
326 {
327 struct osf_statfs64 tmp_stat = { 0 };
328
329 tmp_stat.f_type = linux_stat->f_type;
330 tmp_stat.f_fsize = linux_stat->f_frsize;
331 tmp_stat.f_bsize = linux_stat->f_bsize;
332 tmp_stat.f_blocks = linux_stat->f_blocks;
333 tmp_stat.f_bfree = linux_stat->f_bfree;
334 tmp_stat.f_bavail = linux_stat->f_bavail;
335 tmp_stat.f_files = linux_stat->f_files;
336 tmp_stat.f_ffree = linux_stat->f_ffree;
337 tmp_stat.f_fsid = linux_stat->f_fsid;
338 if (bufsiz > sizeof(tmp_stat))
339 bufsiz = sizeof(tmp_stat);
340 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
341 }
342
343 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
344 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
345 {
346 struct kstatfs linux_stat;
347 int error = user_statfs(pathname, &linux_stat);
348 if (!error)
349 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
350 return error;
351 }
352
353 SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
354 {
355 struct kstat stat;
356 int error;
357
358 error = vfs_stat(name, &stat);
359 if (error)
360 return error;
361
362 return linux_to_osf_stat(&stat, buf);
363 }
364
365 SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf)
366 {
367 struct kstat stat;
368 int error;
369
370 error = vfs_lstat(name, &stat);
371 if (error)
372 return error;
373
374 return linux_to_osf_stat(&stat, buf);
375 }
376
377 SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf)
378 {
379 struct kstat stat;
380 int error;
381
382 error = vfs_fstat(fd, &stat);
383 if (error)
384 return error;
385
386 return linux_to_osf_stat(&stat, buf);
387 }
388
389 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
390 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
391 {
392 struct kstatfs linux_stat;
393 int error = fd_statfs(fd, &linux_stat);
394 if (!error)
395 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
396 return error;
397 }
398
399 SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname,
400 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
401 {
402 struct kstatfs linux_stat;
403 int error = user_statfs(pathname, &linux_stat);
404 if (!error)
405 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
406 return error;
407 }
408
409 SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd,
410 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
411 {
412 struct kstatfs linux_stat;
413 int error = fd_statfs(fd, &linux_stat);
414 if (!error)
415 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
416 return error;
417 }
418
419 /*
420 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
421 *
422 * Although to be frank, neither are the native Linux/i386 ones..
423 */
424 struct ufs_args {
425 char __user *devname;
426 int flags;
427 uid_t exroot;
428 };
429
430 struct cdfs_args {
431 char __user *devname;
432 int flags;
433 uid_t exroot;
434
435 /* This has lots more here, which Linux handles with the option block
436 but I'm too lazy to do the translation into ASCII. */
437 };
438
439 struct procfs_args {
440 char __user *devname;
441 int flags;
442 uid_t exroot;
443 };
444
445 /*
446 * We can't actually handle ufs yet, so we translate UFS mounts to
447 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
448 * layout is so braindead it's a major headache doing it.
449 *
450 * Just how long ago was it written? OTOH our UFS driver may be still
451 * unhappy with OSF UFS. [CHECKME]
452 */
453 static int
454 osf_ufs_mount(const char __user *dirname,
455 struct ufs_args __user *args, int flags)
456 {
457 int retval;
458 struct cdfs_args tmp;
459 struct filename *devname;
460
461 retval = -EFAULT;
462 if (copy_from_user(&tmp, args, sizeof(tmp)))
463 goto out;
464 devname = getname(tmp.devname);
465 retval = PTR_ERR(devname);
466 if (IS_ERR(devname))
467 goto out;
468 retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
469 putname(devname);
470 out:
471 return retval;
472 }
473
474 static int
475 osf_cdfs_mount(const char __user *dirname,
476 struct cdfs_args __user *args, int flags)
477 {
478 int retval;
479 struct cdfs_args tmp;
480 struct filename *devname;
481
482 retval = -EFAULT;
483 if (copy_from_user(&tmp, args, sizeof(tmp)))
484 goto out;
485 devname = getname(tmp.devname);
486 retval = PTR_ERR(devname);
487 if (IS_ERR(devname))
488 goto out;
489 retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
490 putname(devname);
491 out:
492 return retval;
493 }
494
495 static int
496 osf_procfs_mount(const char __user *dirname,
497 struct procfs_args __user *args, int flags)
498 {
499 struct procfs_args tmp;
500
501 if (copy_from_user(&tmp, args, sizeof(tmp)))
502 return -EFAULT;
503
504 return do_mount("", dirname, "proc", flags, NULL);
505 }
506
507 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
508 int, flag, void __user *, data)
509 {
510 int retval;
511
512 switch (typenr) {
513 case 1:
514 retval = osf_ufs_mount(path, data, flag);
515 break;
516 case 6:
517 retval = osf_cdfs_mount(path, data, flag);
518 break;
519 case 9:
520 retval = osf_procfs_mount(path, data, flag);
521 break;
522 default:
523 retval = -EINVAL;
524 printk("osf_mount(%ld, %x)\n", typenr, flag);
525 }
526
527 return retval;
528 }
529
530 SYSCALL_DEFINE1(osf_utsname, char __user *, name)
531 {
532 int error;
533 char tmp[5 * 32];
534
535 down_read(&uts_sem);
536 memcpy(tmp + 0 * 32, utsname()->sysname, 32);
537 memcpy(tmp + 1 * 32, utsname()->nodename, 32);
538 memcpy(tmp + 2 * 32, utsname()->release, 32);
539 memcpy(tmp + 3 * 32, utsname()->version, 32);
540 memcpy(tmp + 4 * 32, utsname()->machine, 32);
541 up_read(&uts_sem);
542
543 if (copy_to_user(name, tmp, sizeof(tmp)))
544 return -EFAULT;
545 return 0;
546 }
547
548 SYSCALL_DEFINE0(getpagesize)
549 {
550 return PAGE_SIZE;
551 }
552
553 SYSCALL_DEFINE0(getdtablesize)
554 {
555 return sysctl_nr_open;
556 }
557
558 /*
559 * For compatibility with OSF/1 only. Use utsname(2) instead.
560 */
561 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
562 {
563 int len, err = 0;
564 char *kname;
565 char tmp[32];
566
567 if (namelen < 0 || namelen > 32)
568 namelen = 32;
569
570 down_read(&uts_sem);
571 kname = utsname()->domainname;
572 len = strnlen(kname, namelen);
573 len = min(len + 1, namelen);
574 memcpy(tmp, kname, len);
575 up_read(&uts_sem);
576
577 if (copy_to_user(name, tmp, len))
578 return -EFAULT;
579 return 0;
580 }
581
582 /*
583 * The following stuff should move into a header file should it ever
584 * be labeled "officially supported." Right now, there is just enough
585 * support to avoid applications (such as tar) printing error
586 * messages. The attributes are not really implemented.
587 */
588
589 /*
590 * Values for Property list entry flag
591 */
592 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
593 by default */
594 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
595 #define PLE_FLAG_ALL -1 /* All flag value */
596
597 struct proplistname_args {
598 unsigned int pl_mask;
599 unsigned int pl_numnames;
600 char **pl_names;
601 };
602
603 union pl_args {
604 struct setargs {
605 char __user *path;
606 long follow;
607 long nbytes;
608 char __user *buf;
609 } set;
610 struct fsetargs {
611 long fd;
612 long nbytes;
613 char __user *buf;
614 } fset;
615 struct getargs {
616 char __user *path;
617 long follow;
618 struct proplistname_args __user *name_args;
619 long nbytes;
620 char __user *buf;
621 int __user *min_buf_size;
622 } get;
623 struct fgetargs {
624 long fd;
625 struct proplistname_args __user *name_args;
626 long nbytes;
627 char __user *buf;
628 int __user *min_buf_size;
629 } fget;
630 struct delargs {
631 char __user *path;
632 long follow;
633 struct proplistname_args __user *name_args;
634 } del;
635 struct fdelargs {
636 long fd;
637 struct proplistname_args __user *name_args;
638 } fdel;
639 };
640
641 enum pl_code {
642 PL_SET = 1, PL_FSET = 2,
643 PL_GET = 3, PL_FGET = 4,
644 PL_DEL = 5, PL_FDEL = 6
645 };
646
647 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
648 union pl_args __user *, args)
649 {
650 long error;
651 int __user *min_buf_size_ptr;
652
653 switch (code) {
654 case PL_SET:
655 if (get_user(error, &args->set.nbytes))
656 error = -EFAULT;
657 break;
658 case PL_FSET:
659 if (get_user(error, &args->fset.nbytes))
660 error = -EFAULT;
661 break;
662 case PL_GET:
663 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
664 if (error)
665 break;
666 error = put_user(0, min_buf_size_ptr);
667 break;
668 case PL_FGET:
669 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
670 if (error)
671 break;
672 error = put_user(0, min_buf_size_ptr);
673 break;
674 case PL_DEL:
675 case PL_FDEL:
676 error = 0;
677 break;
678 default:
679 error = -EOPNOTSUPP;
680 break;
681 };
682 return error;
683 }
684
685 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
686 struct sigstack __user *, uoss)
687 {
688 unsigned long usp = rdusp();
689 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
690 unsigned long oss_os = on_sig_stack(usp);
691 int error;
692
693 if (uss) {
694 void __user *ss_sp;
695
696 error = -EFAULT;
697 if (get_user(ss_sp, &uss->ss_sp))
698 goto out;
699
700 /* If the current stack was set with sigaltstack, don't
701 swap stacks while we are on it. */
702 error = -EPERM;
703 if (current->sas_ss_sp && on_sig_stack(usp))
704 goto out;
705
706 /* Since we don't know the extent of the stack, and we don't
707 track onstack-ness, but rather calculate it, we must
708 presume a size. Ho hum this interface is lossy. */
709 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
710 current->sas_ss_size = SIGSTKSZ;
711 }
712
713 if (uoss) {
714 error = -EFAULT;
715 if (put_user(oss_sp, &uoss->ss_sp) ||
716 put_user(oss_os, &uoss->ss_onstack))
717 goto out;
718 }
719
720 error = 0;
721 out:
722 return error;
723 }
724
725 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
726 {
727 const char *sysinfo_table[] = {
728 utsname()->sysname,
729 utsname()->nodename,
730 utsname()->release,
731 utsname()->version,
732 utsname()->machine,
733 "alpha", /* instruction set architecture */
734 "dummy", /* hardware serial number */
735 "dummy", /* hardware manufacturer */
736 "dummy", /* secure RPC domain */
737 };
738 unsigned long offset;
739 const char *res;
740 long len;
741 char tmp[__NEW_UTS_LEN + 1];
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 return -EINVAL;
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 memcpy(tmp, res, len);
756 up_read(&uts_sem);
757 if (copy_to_user(buf, tmp, len))
758 return -EFAULT;
759 return 0;
760 }
761
762 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
763 unsigned long, nbytes, int __user *, start, void __user *, arg)
764 {
765 unsigned long w;
766 struct percpu_struct *cpu;
767
768 switch (op) {
769 case GSI_IEEE_FP_CONTROL:
770 /* Return current software fp control & status bits. */
771 /* Note that DU doesn't verify available space here. */
772
773 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
774 w = swcr_update_status(w, rdfpcr());
775 if (put_user(w, (unsigned long __user *) buffer))
776 return -EFAULT;
777 return 0;
778
779 case GSI_IEEE_STATE_AT_SIGNAL:
780 /*
781 * Not sure anybody will ever use this weird stuff. These
782 * ops can be used (under OSF/1) to set the fpcr that should
783 * be used when a signal handler starts executing.
784 */
785 break;
786
787 case GSI_UACPROC:
788 if (nbytes < sizeof(unsigned int))
789 return -EINVAL;
790 w = current_thread_info()->status & UAC_BITMASK;
791 if (put_user(w, (unsigned int __user *)buffer))
792 return -EFAULT;
793 return 1;
794
795 case GSI_PROC_TYPE:
796 if (nbytes < sizeof(unsigned long))
797 return -EINVAL;
798 cpu = (struct percpu_struct*)
799 ((char*)hwrpb + hwrpb->processor_offset);
800 w = cpu->type;
801 if (put_user(w, (unsigned long __user*)buffer))
802 return -EFAULT;
803 return 1;
804
805 case GSI_GET_HWRPB:
806 if (nbytes > sizeof(*hwrpb))
807 return -EINVAL;
808 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
809 return -EFAULT;
810 return 1;
811
812 default:
813 break;
814 }
815
816 return -EOPNOTSUPP;
817 }
818
819 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
820 unsigned long, nbytes, int __user *, start, void __user *, arg)
821 {
822 switch (op) {
823 case SSI_IEEE_FP_CONTROL: {
824 unsigned long swcr, fpcr;
825 unsigned int *state;
826
827 /*
828 * Alpha Architecture Handbook 4.7.7.3:
829 * To be fully IEEE compiant, we must track the current IEEE
830 * exception state in software, because spurious bits can be
831 * set in the trap shadow of a software-complete insn.
832 */
833
834 if (get_user(swcr, (unsigned long __user *)buffer))
835 return -EFAULT;
836 state = &current_thread_info()->ieee_state;
837
838 /* Update softare trap enable bits. */
839 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
840
841 /* Update the real fpcr. */
842 fpcr = rdfpcr() & FPCR_DYN_MASK;
843 fpcr |= ieee_swcr_to_fpcr(swcr);
844 wrfpcr(fpcr);
845
846 return 0;
847 }
848
849 case SSI_IEEE_RAISE_EXCEPTION: {
850 unsigned long exc, swcr, fpcr, fex;
851 unsigned int *state;
852
853 if (get_user(exc, (unsigned long __user *)buffer))
854 return -EFAULT;
855 state = &current_thread_info()->ieee_state;
856 exc &= IEEE_STATUS_MASK;
857
858 /* Update softare trap enable bits. */
859 swcr = (*state & IEEE_SW_MASK) | exc;
860 *state |= exc;
861
862 /* Update the real fpcr. */
863 fpcr = rdfpcr();
864 fpcr |= ieee_swcr_to_fpcr(swcr);
865 wrfpcr(fpcr);
866
867 /* If any exceptions set by this call, and are unmasked,
868 send a signal. Old exceptions are not signaled. */
869 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
870 if (fex) {
871 int si_code = FPE_FLTUNK;
872
873 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
874 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
875 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
876 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
877 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
878 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
879
880 send_sig_fault(SIGFPE, si_code,
881 (void __user *)NULL, /* FIXME */
882 0, current);
883 }
884 return 0;
885 }
886
887 case SSI_IEEE_STATE_AT_SIGNAL:
888 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
889 /*
890 * Not sure anybody will ever use this weird stuff. These
891 * ops can be used (under OSF/1) to set the fpcr that should
892 * be used when a signal handler starts executing.
893 */
894 break;
895
896 case SSI_NVPAIRS: {
897 unsigned __user *p = buffer;
898 unsigned i;
899
900 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
901 unsigned v, w, status;
902
903 if (get_user(v, p) || get_user(w, p + 1))
904 return -EFAULT;
905 switch (v) {
906 case SSIN_UACPROC:
907 w &= UAC_BITMASK;
908 status = current_thread_info()->status;
909 status = (status & ~UAC_BITMASK) | w;
910 current_thread_info()->status = status;
911 break;
912
913 default:
914 return -EOPNOTSUPP;
915 }
916 }
917 return 0;
918 }
919
920 case SSI_LMF:
921 return 0;
922
923 default:
924 break;
925 }
926
927 return -EOPNOTSUPP;
928 }
929
930 /* Translations due to the fact that OSF's time_t is an int. Which
931 affects all sorts of things, like timeval and itimerval. */
932
933 extern struct timezone sys_tz;
934
935 struct timeval32
936 {
937 int tv_sec, tv_usec;
938 };
939
940 struct itimerval32
941 {
942 struct timeval32 it_interval;
943 struct timeval32 it_value;
944 };
945
946 static inline long
947 get_tv32(struct timespec64 *o, struct timeval32 __user *i)
948 {
949 struct timeval32 tv;
950 if (copy_from_user(&tv, i, sizeof(struct timeval32)))
951 return -EFAULT;
952 o->tv_sec = tv.tv_sec;
953 o->tv_nsec = tv.tv_usec * NSEC_PER_USEC;
954 return 0;
955 }
956
957 static inline long
958 put_tv32(struct timeval32 __user *o, struct timespec64 *i)
959 {
960 return copy_to_user(o, &(struct timeval32){
961 .tv_sec = i->tv_sec,
962 .tv_usec = i->tv_nsec / NSEC_PER_USEC},
963 sizeof(struct timeval32));
964 }
965
966 static inline long
967 put_tv_to_tv32(struct timeval32 __user *o, struct timeval *i)
968 {
969 return copy_to_user(o, &(struct timeval32){
970 .tv_sec = i->tv_sec,
971 .tv_usec = i->tv_usec},
972 sizeof(struct timeval32));
973 }
974
975 static inline long
976 get_it32(struct itimerval *o, struct itimerval32 __user *i)
977 {
978 struct itimerval32 itv;
979 if (copy_from_user(&itv, i, sizeof(struct itimerval32)))
980 return -EFAULT;
981 o->it_interval.tv_sec = itv.it_interval.tv_sec;
982 o->it_interval.tv_usec = itv.it_interval.tv_usec;
983 o->it_value.tv_sec = itv.it_value.tv_sec;
984 o->it_value.tv_usec = itv.it_value.tv_usec;
985 return 0;
986 }
987
988 static inline long
989 put_it32(struct itimerval32 __user *o, struct itimerval *i)
990 {
991 return copy_to_user(o, &(struct itimerval32){
992 .it_interval.tv_sec = o->it_interval.tv_sec,
993 .it_interval.tv_usec = o->it_interval.tv_usec,
994 .it_value.tv_sec = o->it_value.tv_sec,
995 .it_value.tv_usec = o->it_value.tv_usec},
996 sizeof(struct itimerval32));
997 }
998
999 static inline void
1000 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
1001 {
1002 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
1003 value->tv_sec = jiffies / HZ;
1004 }
1005
1006 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
1007 struct timezone __user *, tz)
1008 {
1009 if (tv) {
1010 struct timespec64 kts;
1011
1012 ktime_get_real_ts64(&kts);
1013 if (put_tv32(tv, &kts))
1014 return -EFAULT;
1015 }
1016 if (tz) {
1017 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
1018 return -EFAULT;
1019 }
1020 return 0;
1021 }
1022
1023 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
1024 struct timezone __user *, tz)
1025 {
1026 struct timespec64 kts;
1027 struct timezone ktz;
1028
1029 if (tv) {
1030 if (get_tv32(&kts, tv))
1031 return -EFAULT;
1032 }
1033 if (tz) {
1034 if (copy_from_user(&ktz, tz, sizeof(*tz)))
1035 return -EFAULT;
1036 }
1037
1038 return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL);
1039 }
1040
1041 asmlinkage long sys_ni_posix_timers(void);
1042
1043 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
1044 {
1045 struct itimerval kit;
1046 int error;
1047
1048 if (!IS_ENABLED(CONFIG_POSIX_TIMERS))
1049 return sys_ni_posix_timers();
1050
1051 error = do_getitimer(which, &kit);
1052 if (!error && put_it32(it, &kit))
1053 error = -EFAULT;
1054
1055 return error;
1056 }
1057
1058 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
1059 struct itimerval32 __user *, out)
1060 {
1061 struct itimerval kin, kout;
1062 int error;
1063
1064 if (!IS_ENABLED(CONFIG_POSIX_TIMERS))
1065 return sys_ni_posix_timers();
1066
1067 if (in) {
1068 if (get_it32(&kin, in))
1069 return -EFAULT;
1070 } else
1071 memset(&kin, 0, sizeof(kin));
1072
1073 error = do_setitimer(which, &kin, out ? &kout : NULL);
1074 if (error || !out)
1075 return error;
1076
1077 if (put_it32(out, &kout))
1078 return -EFAULT;
1079
1080 return 0;
1081
1082 }
1083
1084 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1085 struct timeval32 __user *, tvs)
1086 {
1087 struct timespec64 tv[2];
1088
1089 if (tvs) {
1090 if (get_tv32(&tv[0], &tvs[0]) ||
1091 get_tv32(&tv[1], &tvs[1]))
1092 return -EFAULT;
1093
1094 if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 ||
1095 tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000)
1096 return -EINVAL;
1097 }
1098
1099 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1100 }
1101
1102 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1103 fd_set __user *, exp, struct timeval32 __user *, tvp)
1104 {
1105 struct timespec64 end_time, *to = NULL;
1106 if (tvp) {
1107 struct timespec64 tv;
1108 to = &end_time;
1109
1110 if (get_tv32(&tv, tvp))
1111 return -EFAULT;
1112
1113 if (tv.tv_sec < 0 || tv.tv_nsec < 0)
1114 return -EINVAL;
1115
1116 if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec))
1117 return -EINVAL;
1118
1119 }
1120
1121 /* OSF does not copy back the remaining time. */
1122 return core_sys_select(n, inp, outp, exp, to);
1123 }
1124
1125 struct rusage32 {
1126 struct timeval32 ru_utime; /* user time used */
1127 struct timeval32 ru_stime; /* system time used */
1128 long ru_maxrss; /* maximum resident set size */
1129 long ru_ixrss; /* integral shared memory size */
1130 long ru_idrss; /* integral unshared data size */
1131 long ru_isrss; /* integral unshared stack size */
1132 long ru_minflt; /* page reclaims */
1133 long ru_majflt; /* page faults */
1134 long ru_nswap; /* swaps */
1135 long ru_inblock; /* block input operations */
1136 long ru_oublock; /* block output operations */
1137 long ru_msgsnd; /* messages sent */
1138 long ru_msgrcv; /* messages received */
1139 long ru_nsignals; /* signals received */
1140 long ru_nvcsw; /* voluntary context switches */
1141 long ru_nivcsw; /* involuntary " */
1142 };
1143
1144 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1145 {
1146 struct rusage32 r;
1147 u64 utime, stime;
1148 unsigned long utime_jiffies, stime_jiffies;
1149
1150 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1151 return -EINVAL;
1152
1153 memset(&r, 0, sizeof(r));
1154 switch (who) {
1155 case RUSAGE_SELF:
1156 task_cputime(current, &utime, &stime);
1157 utime_jiffies = nsecs_to_jiffies(utime);
1158 stime_jiffies = nsecs_to_jiffies(stime);
1159 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1160 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1161 r.ru_minflt = current->min_flt;
1162 r.ru_majflt = current->maj_flt;
1163 break;
1164 case RUSAGE_CHILDREN:
1165 utime_jiffies = nsecs_to_jiffies(current->signal->cutime);
1166 stime_jiffies = nsecs_to_jiffies(current->signal->cstime);
1167 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1168 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1169 r.ru_minflt = current->signal->cmin_flt;
1170 r.ru_majflt = current->signal->cmaj_flt;
1171 break;
1172 }
1173
1174 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1175 }
1176
1177 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1178 struct rusage32 __user *, ur)
1179 {
1180 struct rusage r;
1181 long err = kernel_wait4(pid, ustatus, options, &r);
1182 if (err <= 0)
1183 return err;
1184 if (!ur)
1185 return err;
1186 if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime))
1187 return -EFAULT;
1188 if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime))
1189 return -EFAULT;
1190 if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss,
1191 sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss)))
1192 return -EFAULT;
1193 return err;
1194 }
1195
1196 /*
1197 * I don't know what the parameters are: the first one
1198 * seems to be a timeval pointer, and I suspect the second
1199 * one is the time remaining.. Ho humm.. No documentation.
1200 */
1201 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1202 struct timeval32 __user *, remain)
1203 {
1204 struct timespec64 tmp;
1205 unsigned long ticks;
1206
1207 if (get_tv32(&tmp, sleep))
1208 goto fault;
1209
1210 ticks = timespec64_to_jiffies(&tmp);
1211
1212 ticks = schedule_timeout_interruptible(ticks);
1213
1214 if (remain) {
1215 jiffies_to_timespec64(ticks, &tmp);
1216 if (put_tv32(remain, &tmp))
1217 goto fault;
1218 }
1219
1220 return 0;
1221 fault:
1222 return -EFAULT;
1223 }
1224
1225
1226 struct timex32 {
1227 unsigned int modes; /* mode selector */
1228 long offset; /* time offset (usec) */
1229 long freq; /* frequency offset (scaled ppm) */
1230 long maxerror; /* maximum error (usec) */
1231 long esterror; /* estimated error (usec) */
1232 int status; /* clock command/status */
1233 long constant; /* pll time constant */
1234 long precision; /* clock precision (usec) (read only) */
1235 long tolerance; /* clock frequency tolerance (ppm)
1236 * (read only)
1237 */
1238 struct timeval32 time; /* (read only) */
1239 long tick; /* (modified) usecs between clock ticks */
1240
1241 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1242 long jitter; /* pps jitter (us) (ro) */
1243 int shift; /* interval duration (s) (shift) (ro) */
1244 long stabil; /* pps stability (scaled ppm) (ro) */
1245 long jitcnt; /* jitter limit exceeded (ro) */
1246 long calcnt; /* calibration intervals (ro) */
1247 long errcnt; /* calibration errors (ro) */
1248 long stbcnt; /* stability limit exceeded (ro) */
1249
1250 int :32; int :32; int :32; int :32;
1251 int :32; int :32; int :32; int :32;
1252 int :32; int :32; int :32; int :32;
1253 };
1254
1255 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1256 {
1257 struct timex txc;
1258 int ret;
1259
1260 /* copy relevant bits of struct timex. */
1261 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1262 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1263 offsetof(struct timex32, tick)))
1264 return -EFAULT;
1265
1266 ret = do_adjtimex(&txc);
1267 if (ret < 0)
1268 return ret;
1269
1270 /* copy back to timex32 */
1271 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1272 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1273 offsetof(struct timex32, tick))) ||
1274 (put_tv_to_tv32(&txc_p->time, &txc.time)))
1275 return -EFAULT;
1276
1277 return ret;
1278 }
1279
1280 /* Get an address range which is currently unmapped. Similar to the
1281 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1282
1283 static unsigned long
1284 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1285 unsigned long limit)
1286 {
1287 struct vm_unmapped_area_info info;
1288
1289 info.flags = 0;
1290 info.length = len;
1291 info.low_limit = addr;
1292 info.high_limit = limit;
1293 info.align_mask = 0;
1294 info.align_offset = 0;
1295 return vm_unmapped_area(&info);
1296 }
1297
1298 unsigned long
1299 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1300 unsigned long len, unsigned long pgoff,
1301 unsigned long flags)
1302 {
1303 unsigned long limit;
1304
1305 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1306 if (current->personality & ADDR_LIMIT_32BIT)
1307 limit = 0x80000000;
1308 else
1309 limit = TASK_SIZE;
1310
1311 if (len > limit)
1312 return -ENOMEM;
1313
1314 if (flags & MAP_FIXED)
1315 return addr;
1316
1317 /* First, see if the given suggestion fits.
1318
1319 The OSF/1 loader (/sbin/loader) relies on us returning an
1320 address larger than the requested if one exists, which is
1321 a terribly broken way to program.
1322
1323 That said, I can see the use in being able to suggest not
1324 merely specific addresses, but regions of memory -- perhaps
1325 this feature should be incorporated into all ports? */
1326
1327 if (addr) {
1328 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1329 if (addr != (unsigned long) -ENOMEM)
1330 return addr;
1331 }
1332
1333 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1334 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1335 len, limit);
1336 if (addr != (unsigned long) -ENOMEM)
1337 return addr;
1338
1339 /* Finally, try allocating in low memory. */
1340 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1341
1342 return addr;
1343 }
1344
1345 #ifdef CONFIG_OSF4_COMPAT
1346
1347 /* Clear top 32 bits of iov_len in the user's buffer for
1348 compatibility with old versions of OSF/1 where iov_len
1349 was defined as int. */
1350 static int
1351 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1352 {
1353 unsigned long i;
1354
1355 for (i = 0 ; i < count ; i++) {
1356 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1357
1358 if (put_user(0, iov_len_high))
1359 return -EFAULT;
1360 }
1361 return 0;
1362 }
1363
1364 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1365 const struct iovec __user *, vector, unsigned long, count)
1366 {
1367 if (unlikely(personality(current->personality) == PER_OSF4))
1368 if (osf_fix_iov_len(vector, count))
1369 return -EFAULT;
1370 return sys_readv(fd, vector, count);
1371 }
1372
1373 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1374 const struct iovec __user *, vector, unsigned long, count)
1375 {
1376 if (unlikely(personality(current->personality) == PER_OSF4))
1377 if (osf_fix_iov_len(vector, count))
1378 return -EFAULT;
1379 return sys_writev(fd, vector, count);
1380 }
1381
1382 #endif
1383
1384 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1385 {
1386 int prio = sys_getpriority(which, who);
1387 if (prio >= 0) {
1388 /* Return value is the unbiased priority, i.e. 20 - prio.
1389 This does result in negative return values, so signal
1390 no error */
1391 force_successful_syscall_return();
1392 prio = 20 - prio;
1393 }
1394 return prio;
1395 }
1396
1397 SYSCALL_DEFINE0(getxuid)
1398 {
1399 current_pt_regs()->r20 = sys_geteuid();
1400 return sys_getuid();
1401 }
1402
1403 SYSCALL_DEFINE0(getxgid)
1404 {
1405 current_pt_regs()->r20 = sys_getegid();
1406 return sys_getgid();
1407 }
1408
1409 SYSCALL_DEFINE0(getxpid)
1410 {
1411 current_pt_regs()->r20 = sys_getppid();
1412 return sys_getpid();
1413 }
1414
1415 SYSCALL_DEFINE0(alpha_pipe)
1416 {
1417 int fd[2];
1418 int res = do_pipe_flags(fd, 0);
1419 if (!res) {
1420 /* The return values are in $0 and $20. */
1421 current_pt_regs()->r20 = fd[1];
1422 res = fd[0];
1423 }
1424 return res;
1425 }
1426
1427 SYSCALL_DEFINE1(sethae, unsigned long, val)
1428 {
1429 current_pt_regs()->hae = val;
1430 return 0;
1431 }
Linux with added FPC-III support