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Merge tag 'sched-urgent-2020-12-27' of git://git.kernel.org/pub/scm/linux/kernel...
[linux/fpc-iii.git] / arch / alpha / kernel / osf_sys.c
blobd5367a1c6300c1f6e62b95635cc5e37770b6265a
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 char tmp[5 * 32];
533
534 down_read(&uts_sem);
535 memcpy(tmp + 0 * 32, utsname()->sysname, 32);
536 memcpy(tmp + 1 * 32, utsname()->nodename, 32);
537 memcpy(tmp + 2 * 32, utsname()->release, 32);
538 memcpy(tmp + 3 * 32, utsname()->version, 32);
539 memcpy(tmp + 4 * 32, utsname()->machine, 32);
540 up_read(&uts_sem);
541
542 if (copy_to_user(name, tmp, sizeof(tmp)))
543 return -EFAULT;
544 return 0;
545 }
546
547 SYSCALL_DEFINE0(getpagesize)
548 {
549 return PAGE_SIZE;
550 }
551
552 SYSCALL_DEFINE0(getdtablesize)
553 {
554 return sysctl_nr_open;
555 }
556
557 /*
558 * For compatibility with OSF/1 only. Use utsname(2) instead.
559 */
560 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
561 {
562 int len;
563 char *kname;
564 char tmp[32];
565
566 if (namelen < 0 || namelen > 32)
567 namelen = 32;
568
569 down_read(&uts_sem);
570 kname = utsname()->domainname;
571 len = strnlen(kname, namelen);
572 len = min(len + 1, namelen);
573 memcpy(tmp, kname, len);
574 up_read(&uts_sem);
575
576 if (copy_to_user(name, tmp, len))
577 return -EFAULT;
578 return 0;
579 }
580
581 /*
582 * The following stuff should move into a header file should it ever
583 * be labeled "officially supported." Right now, there is just enough
584 * support to avoid applications (such as tar) printing error
585 * messages. The attributes are not really implemented.
586 */
587
588 /*
589 * Values for Property list entry flag
590 */
591 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
592 by default */
593 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
594 #define PLE_FLAG_ALL -1 /* All flag value */
595
596 struct proplistname_args {
597 unsigned int pl_mask;
598 unsigned int pl_numnames;
599 char **pl_names;
600 };
601
602 union pl_args {
603 struct setargs {
604 char __user *path;
605 long follow;
606 long nbytes;
607 char __user *buf;
608 } set;
609 struct fsetargs {
610 long fd;
611 long nbytes;
612 char __user *buf;
613 } fset;
614 struct getargs {
615 char __user *path;
616 long follow;
617 struct proplistname_args __user *name_args;
618 long nbytes;
619 char __user *buf;
620 int __user *min_buf_size;
621 } get;
622 struct fgetargs {
623 long fd;
624 struct proplistname_args __user *name_args;
625 long nbytes;
626 char __user *buf;
627 int __user *min_buf_size;
628 } fget;
629 struct delargs {
630 char __user *path;
631 long follow;
632 struct proplistname_args __user *name_args;
633 } del;
634 struct fdelargs {
635 long fd;
636 struct proplistname_args __user *name_args;
637 } fdel;
638 };
639
640 enum pl_code {
641 PL_SET = 1, PL_FSET = 2,
642 PL_GET = 3, PL_FGET = 4,
643 PL_DEL = 5, PL_FDEL = 6
644 };
645
646 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
647 union pl_args __user *, args)
648 {
649 long error;
650 int __user *min_buf_size_ptr;
651
652 switch (code) {
653 case PL_SET:
654 if (get_user(error, &args->set.nbytes))
655 error = -EFAULT;
656 break;
657 case PL_FSET:
658 if (get_user(error, &args->fset.nbytes))
659 error = -EFAULT;
660 break;
661 case PL_GET:
662 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
663 if (error)
664 break;
665 error = put_user(0, min_buf_size_ptr);
666 break;
667 case PL_FGET:
668 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
669 if (error)
670 break;
671 error = put_user(0, min_buf_size_ptr);
672 break;
673 case PL_DEL:
674 case PL_FDEL:
675 error = 0;
676 break;
677 default:
678 error = -EOPNOTSUPP;
679 break;
680 }
681 return error;
682 }
683
684 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
685 struct sigstack __user *, uoss)
686 {
687 unsigned long usp = rdusp();
688 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
689 unsigned long oss_os = on_sig_stack(usp);
690 int error;
691
692 if (uss) {
693 void __user *ss_sp;
694
695 error = -EFAULT;
696 if (get_user(ss_sp, &uss->ss_sp))
697 goto out;
698
699 /* If the current stack was set with sigaltstack, don't
700 swap stacks while we are on it. */
701 error = -EPERM;
702 if (current->sas_ss_sp && on_sig_stack(usp))
703 goto out;
704
705 /* Since we don't know the extent of the stack, and we don't
706 track onstack-ness, but rather calculate it, we must
707 presume a size. Ho hum this interface is lossy. */
708 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
709 current->sas_ss_size = SIGSTKSZ;
710 }
711
712 if (uoss) {
713 error = -EFAULT;
714 if (put_user(oss_sp, &uoss->ss_sp) ||
715 put_user(oss_os, &uoss->ss_onstack))
716 goto out;
717 }
718
719 error = 0;
720 out:
721 return error;
722 }
723
724 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
725 {
726 const char *sysinfo_table[] = {
727 utsname()->sysname,
728 utsname()->nodename,
729 utsname()->release,
730 utsname()->version,
731 utsname()->machine,
732 "alpha", /* instruction set architecture */
733 "dummy", /* hardware serial number */
734 "dummy", /* hardware manufacturer */
735 "dummy", /* secure RPC domain */
736 };
737 unsigned long offset;
738 const char *res;
739 long len;
740 char tmp[__NEW_UTS_LEN + 1];
741
742 offset = command-1;
743 if (offset >= ARRAY_SIZE(sysinfo_table)) {
744 /* Digital UNIX has a few unpublished interfaces here */
745 printk("sysinfo(%d)", command);
746 return -EINVAL;
747 }
748
749 down_read(&uts_sem);
750 res = sysinfo_table[offset];
751 len = strlen(res)+1;
752 if ((unsigned long)len > (unsigned long)count)
753 len = count;
754 memcpy(tmp, res, len);
755 up_read(&uts_sem);
756 if (copy_to_user(buf, tmp, len))
757 return -EFAULT;
758 return 0;
759 }
760
761 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
762 unsigned long, nbytes, int __user *, start, void __user *, arg)
763 {
764 unsigned long w;
765 struct percpu_struct *cpu;
766
767 switch (op) {
768 case GSI_IEEE_FP_CONTROL:
769 /* Return current software fp control & status bits. */
770 /* Note that DU doesn't verify available space here. */
771
772 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
773 w = swcr_update_status(w, rdfpcr());
774 if (put_user(w, (unsigned long __user *) buffer))
775 return -EFAULT;
776 return 0;
777
778 case GSI_IEEE_STATE_AT_SIGNAL:
779 /*
780 * Not sure anybody will ever use this weird stuff. These
781 * ops can be used (under OSF/1) to set the fpcr that should
782 * be used when a signal handler starts executing.
783 */
784 break;
785
786 case GSI_UACPROC:
787 if (nbytes < sizeof(unsigned int))
788 return -EINVAL;
789 w = current_thread_info()->status & UAC_BITMASK;
790 if (put_user(w, (unsigned int __user *)buffer))
791 return -EFAULT;
792 return 1;
793
794 case GSI_PROC_TYPE:
795 if (nbytes < sizeof(unsigned long))
796 return -EINVAL;
797 cpu = (struct percpu_struct*)
798 ((char*)hwrpb + hwrpb->processor_offset);
799 w = cpu->type;
800 if (put_user(w, (unsigned long __user*)buffer))
801 return -EFAULT;
802 return 1;
803
804 case GSI_GET_HWRPB:
805 if (nbytes > sizeof(*hwrpb))
806 return -EINVAL;
807 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
808 return -EFAULT;
809 return 1;
810
811 default:
812 break;
813 }
814
815 return -EOPNOTSUPP;
816 }
817
818 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
819 unsigned long, nbytes, int __user *, start, void __user *, arg)
820 {
821 switch (op) {
822 case SSI_IEEE_FP_CONTROL: {
823 unsigned long swcr, fpcr;
824 unsigned int *state;
825
826 /*
827 * Alpha Architecture Handbook 4.7.7.3:
828 * To be fully IEEE compiant, we must track the current IEEE
829 * exception state in software, because spurious bits can be
830 * set in the trap shadow of a software-complete insn.
831 */
832
833 if (get_user(swcr, (unsigned long __user *)buffer))
834 return -EFAULT;
835 state = &current_thread_info()->ieee_state;
836
837 /* Update softare trap enable bits. */
838 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
839
840 /* Update the real fpcr. */
841 fpcr = rdfpcr() & FPCR_DYN_MASK;
842 fpcr |= ieee_swcr_to_fpcr(swcr);
843 wrfpcr(fpcr);
844
845 return 0;
846 }
847
848 case SSI_IEEE_RAISE_EXCEPTION: {
849 unsigned long exc, swcr, fpcr, fex;
850 unsigned int *state;
851
852 if (get_user(exc, (unsigned long __user *)buffer))
853 return -EFAULT;
854 state = &current_thread_info()->ieee_state;
855 exc &= IEEE_STATUS_MASK;
856
857 /* Update softare trap enable bits. */
858 swcr = (*state & IEEE_SW_MASK) | exc;
859 *state |= exc;
860
861 /* Update the real fpcr. */
862 fpcr = rdfpcr();
863 fpcr |= ieee_swcr_to_fpcr(swcr);
864 wrfpcr(fpcr);
865
866 /* If any exceptions set by this call, and are unmasked,
867 send a signal. Old exceptions are not signaled. */
868 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
869 if (fex) {
870 int si_code = FPE_FLTUNK;
871
872 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
873 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
874 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
875 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
876 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
877 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
878
879 send_sig_fault(SIGFPE, si_code,
880 (void __user *)NULL, /* FIXME */
881 0, current);
882 }
883 return 0;
884 }
885
886 case SSI_IEEE_STATE_AT_SIGNAL:
887 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
888 /*
889 * Not sure anybody will ever use this weird stuff. These
890 * ops can be used (under OSF/1) to set the fpcr that should
891 * be used when a signal handler starts executing.
892 */
893 break;
894
895 case SSI_NVPAIRS: {
896 unsigned __user *p = buffer;
897 unsigned i;
898
899 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
900 unsigned v, w, status;
901
902 if (get_user(v, p) || get_user(w, p + 1))
903 return -EFAULT;
904 switch (v) {
905 case SSIN_UACPROC:
906 w &= UAC_BITMASK;
907 status = current_thread_info()->status;
908 status = (status & ~UAC_BITMASK) | w;
909 current_thread_info()->status = status;
910 break;
911
912 default:
913 return -EOPNOTSUPP;
914 }
915 }
916 return 0;
917 }
918
919 case SSI_LMF:
920 return 0;
921
922 default:
923 break;
924 }
925
926 return -EOPNOTSUPP;
927 }
928
929 /* Translations due to the fact that OSF's time_t is an int. Which
930 affects all sorts of things, like timeval and itimerval. */
931
932 extern struct timezone sys_tz;
933
934 struct timeval32
935 {
936 int tv_sec, tv_usec;
937 };
938
939 struct itimerval32
940 {
941 struct timeval32 it_interval;
942 struct timeval32 it_value;
943 };
944
945 static inline long
946 get_tv32(struct timespec64 *o, struct timeval32 __user *i)
947 {
948 struct timeval32 tv;
949 if (copy_from_user(&tv, i, sizeof(struct timeval32)))
950 return -EFAULT;
951 o->tv_sec = tv.tv_sec;
952 o->tv_nsec = tv.tv_usec * NSEC_PER_USEC;
953 return 0;
954 }
955
956 static inline long
957 put_tv32(struct timeval32 __user *o, struct timespec64 *i)
958 {
959 return copy_to_user(o, &(struct timeval32){
960 .tv_sec = i->tv_sec,
961 .tv_usec = i->tv_nsec / NSEC_PER_USEC},
962 sizeof(struct timeval32));
963 }
964
965 static inline long
966 put_tv_to_tv32(struct timeval32 __user *o, struct __kernel_old_timeval *i)
967 {
968 return copy_to_user(o, &(struct timeval32){
969 .tv_sec = i->tv_sec,
970 .tv_usec = i->tv_usec},
971 sizeof(struct timeval32));
972 }
973
974 static inline void
975 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
976 {
977 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
978 value->tv_sec = jiffies / HZ;
979 }
980
981 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
982 struct timezone __user *, tz)
983 {
984 if (tv) {
985 struct timespec64 kts;
986
987 ktime_get_real_ts64(&kts);
988 if (put_tv32(tv, &kts))
989 return -EFAULT;
990 }
991 if (tz) {
992 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
993 return -EFAULT;
994 }
995 return 0;
996 }
997
998 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
999 struct timezone __user *, tz)
1000 {
1001 struct timespec64 kts;
1002 struct timezone ktz;
1003
1004 if (tv) {
1005 if (get_tv32(&kts, tv))
1006 return -EFAULT;
1007 }
1008 if (tz) {
1009 if (copy_from_user(&ktz, tz, sizeof(*tz)))
1010 return -EFAULT;
1011 }
1012
1013 return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL);
1014 }
1015
1016 asmlinkage long sys_ni_posix_timers(void);
1017
1018 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1019 struct timeval32 __user *, tvs)
1020 {
1021 struct timespec64 tv[2];
1022
1023 if (tvs) {
1024 if (get_tv32(&tv[0], &tvs[0]) ||
1025 get_tv32(&tv[1], &tvs[1]))
1026 return -EFAULT;
1027
1028 if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 ||
1029 tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000)
1030 return -EINVAL;
1031 }
1032
1033 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1034 }
1035
1036 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1037 fd_set __user *, exp, struct timeval32 __user *, tvp)
1038 {
1039 struct timespec64 end_time, *to = NULL;
1040 if (tvp) {
1041 struct timespec64 tv;
1042 to = &end_time;
1043
1044 if (get_tv32(&tv, tvp))
1045 return -EFAULT;
1046
1047 if (tv.tv_sec < 0 || tv.tv_nsec < 0)
1048 return -EINVAL;
1049
1050 if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec))
1051 return -EINVAL;
1052
1053 }
1054
1055 /* OSF does not copy back the remaining time. */
1056 return core_sys_select(n, inp, outp, exp, to);
1057 }
1058
1059 struct rusage32 {
1060 struct timeval32 ru_utime; /* user time used */
1061 struct timeval32 ru_stime; /* system time used */
1062 long ru_maxrss; /* maximum resident set size */
1063 long ru_ixrss; /* integral shared memory size */
1064 long ru_idrss; /* integral unshared data size */
1065 long ru_isrss; /* integral unshared stack size */
1066 long ru_minflt; /* page reclaims */
1067 long ru_majflt; /* page faults */
1068 long ru_nswap; /* swaps */
1069 long ru_inblock; /* block input operations */
1070 long ru_oublock; /* block output operations */
1071 long ru_msgsnd; /* messages sent */
1072 long ru_msgrcv; /* messages received */
1073 long ru_nsignals; /* signals received */
1074 long ru_nvcsw; /* voluntary context switches */
1075 long ru_nivcsw; /* involuntary " */
1076 };
1077
1078 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1079 {
1080 struct rusage32 r;
1081 u64 utime, stime;
1082 unsigned long utime_jiffies, stime_jiffies;
1083
1084 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1085 return -EINVAL;
1086
1087 memset(&r, 0, sizeof(r));
1088 switch (who) {
1089 case RUSAGE_SELF:
1090 task_cputime(current, &utime, &stime);
1091 utime_jiffies = nsecs_to_jiffies(utime);
1092 stime_jiffies = nsecs_to_jiffies(stime);
1093 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1094 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1095 r.ru_minflt = current->min_flt;
1096 r.ru_majflt = current->maj_flt;
1097 break;
1098 case RUSAGE_CHILDREN:
1099 utime_jiffies = nsecs_to_jiffies(current->signal->cutime);
1100 stime_jiffies = nsecs_to_jiffies(current->signal->cstime);
1101 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1102 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1103 r.ru_minflt = current->signal->cmin_flt;
1104 r.ru_majflt = current->signal->cmaj_flt;
1105 break;
1106 }
1107
1108 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1109 }
1110
1111 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1112 struct rusage32 __user *, ur)
1113 {
1114 struct rusage r;
1115 long err = kernel_wait4(pid, ustatus, options, &r);
1116 if (err <= 0)
1117 return err;
1118 if (!ur)
1119 return err;
1120 if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime))
1121 return -EFAULT;
1122 if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime))
1123 return -EFAULT;
1124 if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss,
1125 sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss)))
1126 return -EFAULT;
1127 return err;
1128 }
1129
1130 /*
1131 * I don't know what the parameters are: the first one
1132 * seems to be a timeval pointer, and I suspect the second
1133 * one is the time remaining.. Ho humm.. No documentation.
1134 */
1135 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1136 struct timeval32 __user *, remain)
1137 {
1138 struct timespec64 tmp;
1139 unsigned long ticks;
1140
1141 if (get_tv32(&tmp, sleep))
1142 goto fault;
1143
1144 ticks = timespec64_to_jiffies(&tmp);
1145
1146 ticks = schedule_timeout_interruptible(ticks);
1147
1148 if (remain) {
1149 jiffies_to_timespec64(ticks, &tmp);
1150 if (put_tv32(remain, &tmp))
1151 goto fault;
1152 }
1153
1154 return 0;
1155 fault:
1156 return -EFAULT;
1157 }
1158
1159
1160 struct timex32 {
1161 unsigned int modes; /* mode selector */
1162 long offset; /* time offset (usec) */
1163 long freq; /* frequency offset (scaled ppm) */
1164 long maxerror; /* maximum error (usec) */
1165 long esterror; /* estimated error (usec) */
1166 int status; /* clock command/status */
1167 long constant; /* pll time constant */
1168 long precision; /* clock precision (usec) (read only) */
1169 long tolerance; /* clock frequency tolerance (ppm)
1170 * (read only)
1171 */
1172 struct timeval32 time; /* (read only) */
1173 long tick; /* (modified) usecs between clock ticks */
1174
1175 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1176 long jitter; /* pps jitter (us) (ro) */
1177 int shift; /* interval duration (s) (shift) (ro) */
1178 long stabil; /* pps stability (scaled ppm) (ro) */
1179 long jitcnt; /* jitter limit exceeded (ro) */
1180 long calcnt; /* calibration intervals (ro) */
1181 long errcnt; /* calibration errors (ro) */
1182 long stbcnt; /* stability limit exceeded (ro) */
1183
1184 int :32; int :32; int :32; int :32;
1185 int :32; int :32; int :32; int :32;
1186 int :32; int :32; int :32; int :32;
1187 };
1188
1189 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1190 {
1191 struct __kernel_timex txc;
1192 int ret;
1193
1194 /* copy relevant bits of struct timex. */
1195 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1196 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1197 offsetof(struct timex32, tick)))
1198 return -EFAULT;
1199
1200 ret = do_adjtimex(&txc);
1201 if (ret < 0)
1202 return ret;
1203
1204 /* copy back to timex32 */
1205 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1206 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1207 offsetof(struct timex32, tick))) ||
1208 (put_user(txc.time.tv_sec, &txc_p->time.tv_sec)) ||
1209 (put_user(txc.time.tv_usec, &txc_p->time.tv_usec)))
1210 return -EFAULT;
1211
1212 return ret;
1213 }
1214
1215 /* Get an address range which is currently unmapped. Similar to the
1216 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1217
1218 static unsigned long
1219 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1220 unsigned long limit)
1221 {
1222 struct vm_unmapped_area_info info;
1223
1224 info.flags = 0;
1225 info.length = len;
1226 info.low_limit = addr;
1227 info.high_limit = limit;
1228 info.align_mask = 0;
1229 info.align_offset = 0;
1230 return vm_unmapped_area(&info);
1231 }
1232
1233 unsigned long
1234 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1235 unsigned long len, unsigned long pgoff,
1236 unsigned long flags)
1237 {
1238 unsigned long limit;
1239
1240 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1241 if (current->personality & ADDR_LIMIT_32BIT)
1242 limit = 0x80000000;
1243 else
1244 limit = TASK_SIZE;
1245
1246 if (len > limit)
1247 return -ENOMEM;
1248
1249 if (flags & MAP_FIXED)
1250 return addr;
1251
1252 /* First, see if the given suggestion fits.
1253
1254 The OSF/1 loader (/sbin/loader) relies on us returning an
1255 address larger than the requested if one exists, which is
1256 a terribly broken way to program.
1257
1258 That said, I can see the use in being able to suggest not
1259 merely specific addresses, but regions of memory -- perhaps
1260 this feature should be incorporated into all ports? */
1261
1262 if (addr) {
1263 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1264 if (addr != (unsigned long) -ENOMEM)
1265 return addr;
1266 }
1267
1268 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1269 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1270 len, limit);
1271 if (addr != (unsigned long) -ENOMEM)
1272 return addr;
1273
1274 /* Finally, try allocating in low memory. */
1275 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1276
1277 return addr;
1278 }
1279
1280 #ifdef CONFIG_OSF4_COMPAT
1281 /* Clear top 32 bits of iov_len in the user's buffer for
1282 compatibility with old versions of OSF/1 where iov_len
1283 was defined as int. */
1284 static int
1285 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1286 {
1287 unsigned long i;
1288
1289 for (i = 0 ; i < count ; i++) {
1290 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1291
1292 if (put_user(0, iov_len_high))
1293 return -EFAULT;
1294 }
1295 return 0;
1296 }
1297 #endif
1298
1299 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1300 const struct iovec __user *, vector, unsigned long, count)
1301 {
1302 #ifdef CONFIG_OSF4_COMPAT
1303 if (unlikely(personality(current->personality) == PER_OSF4))
1304 if (osf_fix_iov_len(vector, count))
1305 return -EFAULT;
1306 #endif
1307
1308 return sys_readv(fd, vector, count);
1309 }
1310
1311 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1312 const struct iovec __user *, vector, unsigned long, count)
1313 {
1314 #ifdef CONFIG_OSF4_COMPAT
1315 if (unlikely(personality(current->personality) == PER_OSF4))
1316 if (osf_fix_iov_len(vector, count))
1317 return -EFAULT;
1318 #endif
1319 return sys_writev(fd, vector, count);
1320 }
1321
1322 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1323 {
1324 int prio = sys_getpriority(which, who);
1325 if (prio >= 0) {
1326 /* Return value is the unbiased priority, i.e. 20 - prio.
1327 This does result in negative return values, so signal
1328 no error */
1329 force_successful_syscall_return();
1330 prio = 20 - prio;
1331 }
1332 return prio;
1333 }
1334
1335 SYSCALL_DEFINE0(getxuid)
1336 {
1337 current_pt_regs()->r20 = sys_geteuid();
1338 return sys_getuid();
1339 }
1340
1341 SYSCALL_DEFINE0(getxgid)
1342 {
1343 current_pt_regs()->r20 = sys_getegid();
1344 return sys_getgid();
1345 }
1346
1347 SYSCALL_DEFINE0(getxpid)
1348 {
1349 current_pt_regs()->r20 = sys_getppid();
1350 return sys_getpid();
1351 }
1352
1353 SYSCALL_DEFINE0(alpha_pipe)
1354 {
1355 int fd[2];
1356 int res = do_pipe_flags(fd, 0);
1357 if (!res) {
1358 /* The return values are in $0 and $20. */
1359 current_pt_regs()->r20 = fd[1];
1360 res = fd[0];
1361 }
1362 return res;
1363 }
1364
1365 SYSCALL_DEFINE1(sethae, unsigned long, val)
1366 {
1367 current_pt_regs()->hae = val;
1368 return 0;
1369 }
Linux with added FPC-III support