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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / arch / alpha / kernel / osf_sys.c
blobfa1a392ca9a218f2327108c20c879ac9ea35b7bd
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 = sys_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
534 down_read(&uts_sem);
535 error = -EFAULT;
536 if (copy_to_user(name + 0, utsname()->sysname, 32))
537 goto out;
538 if (copy_to_user(name + 32, utsname()->nodename, 32))
539 goto out;
540 if (copy_to_user(name + 64, utsname()->release, 32))
541 goto out;
542 if (copy_to_user(name + 96, utsname()->version, 32))
543 goto out;
544 if (copy_to_user(name + 128, utsname()->machine, 32))
545 goto out;
546
547 error = 0;
548 out:
549 up_read(&uts_sem);
550 return error;
551 }
552
553 SYSCALL_DEFINE0(getpagesize)
554 {
555 return PAGE_SIZE;
556 }
557
558 SYSCALL_DEFINE0(getdtablesize)
559 {
560 return sysctl_nr_open;
561 }
562
563 /*
564 * For compatibility with OSF/1 only. Use utsname(2) instead.
565 */
566 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
567 {
568 int len, err = 0;
569 char *kname;
570
571 if (namelen > 32)
572 namelen = 32;
573
574 down_read(&uts_sem);
575 kname = utsname()->domainname;
576 len = strnlen(kname, namelen);
577 if (copy_to_user(name, kname, min(len + 1, namelen)))
578 err = -EFAULT;
579 up_read(&uts_sem);
580
581 return err;
582 }
583
584 /*
585 * The following stuff should move into a header file should it ever
586 * be labeled "officially supported." Right now, there is just enough
587 * support to avoid applications (such as tar) printing error
588 * messages. The attributes are not really implemented.
589 */
590
591 /*
592 * Values for Property list entry flag
593 */
594 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
595 by default */
596 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
597 #define PLE_FLAG_ALL -1 /* All flag value */
598
599 struct proplistname_args {
600 unsigned int pl_mask;
601 unsigned int pl_numnames;
602 char **pl_names;
603 };
604
605 union pl_args {
606 struct setargs {
607 char __user *path;
608 long follow;
609 long nbytes;
610 char __user *buf;
611 } set;
612 struct fsetargs {
613 long fd;
614 long nbytes;
615 char __user *buf;
616 } fset;
617 struct getargs {
618 char __user *path;
619 long follow;
620 struct proplistname_args __user *name_args;
621 long nbytes;
622 char __user *buf;
623 int __user *min_buf_size;
624 } get;
625 struct fgetargs {
626 long fd;
627 struct proplistname_args __user *name_args;
628 long nbytes;
629 char __user *buf;
630 int __user *min_buf_size;
631 } fget;
632 struct delargs {
633 char __user *path;
634 long follow;
635 struct proplistname_args __user *name_args;
636 } del;
637 struct fdelargs {
638 long fd;
639 struct proplistname_args __user *name_args;
640 } fdel;
641 };
642
643 enum pl_code {
644 PL_SET = 1, PL_FSET = 2,
645 PL_GET = 3, PL_FGET = 4,
646 PL_DEL = 5, PL_FDEL = 6
647 };
648
649 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
650 union pl_args __user *, args)
651 {
652 long error;
653 int __user *min_buf_size_ptr;
654
655 switch (code) {
656 case PL_SET:
657 if (get_user(error, &args->set.nbytes))
658 error = -EFAULT;
659 break;
660 case PL_FSET:
661 if (get_user(error, &args->fset.nbytes))
662 error = -EFAULT;
663 break;
664 case PL_GET:
665 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
666 if (error)
667 break;
668 error = put_user(0, min_buf_size_ptr);
669 break;
670 case PL_FGET:
671 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
672 if (error)
673 break;
674 error = put_user(0, min_buf_size_ptr);
675 break;
676 case PL_DEL:
677 case PL_FDEL:
678 error = 0;
679 break;
680 default:
681 error = -EOPNOTSUPP;
682 break;
683 };
684 return error;
685 }
686
687 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
688 struct sigstack __user *, uoss)
689 {
690 unsigned long usp = rdusp();
691 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
692 unsigned long oss_os = on_sig_stack(usp);
693 int error;
694
695 if (uss) {
696 void __user *ss_sp;
697
698 error = -EFAULT;
699 if (get_user(ss_sp, &uss->ss_sp))
700 goto out;
701
702 /* If the current stack was set with sigaltstack, don't
703 swap stacks while we are on it. */
704 error = -EPERM;
705 if (current->sas_ss_sp && on_sig_stack(usp))
706 goto out;
707
708 /* Since we don't know the extent of the stack, and we don't
709 track onstack-ness, but rather calculate it, we must
710 presume a size. Ho hum this interface is lossy. */
711 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
712 current->sas_ss_size = SIGSTKSZ;
713 }
714
715 if (uoss) {
716 error = -EFAULT;
717 if (put_user(oss_sp, &uoss->ss_sp) ||
718 put_user(oss_os, &uoss->ss_onstack))
719 goto out;
720 }
721
722 error = 0;
723 out:
724 return error;
725 }
726
727 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
728 {
729 const char *sysinfo_table[] = {
730 utsname()->sysname,
731 utsname()->nodename,
732 utsname()->release,
733 utsname()->version,
734 utsname()->machine,
735 "alpha", /* instruction set architecture */
736 "dummy", /* hardware serial number */
737 "dummy", /* hardware manufacturer */
738 "dummy", /* secure RPC domain */
739 };
740 unsigned long offset;
741 const char *res;
742 long len, err = -EINVAL;
743
744 offset = command-1;
745 if (offset >= ARRAY_SIZE(sysinfo_table)) {
746 /* Digital UNIX has a few unpublished interfaces here */
747 printk("sysinfo(%d)", command);
748 goto out;
749 }
750
751 down_read(&uts_sem);
752 res = sysinfo_table[offset];
753 len = strlen(res)+1;
754 if ((unsigned long)len > (unsigned long)count)
755 len = count;
756 if (copy_to_user(buf, res, len))
757 err = -EFAULT;
758 else
759 err = 0;
760 up_read(&uts_sem);
761 out:
762 return err;
763 }
764
765 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
766 unsigned long, nbytes, int __user *, start, void __user *, arg)
767 {
768 unsigned long w;
769 struct percpu_struct *cpu;
770
771 switch (op) {
772 case GSI_IEEE_FP_CONTROL:
773 /* Return current software fp control & status bits. */
774 /* Note that DU doesn't verify available space here. */
775
776 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
777 w = swcr_update_status(w, rdfpcr());
778 if (put_user(w, (unsigned long __user *) buffer))
779 return -EFAULT;
780 return 0;
781
782 case GSI_IEEE_STATE_AT_SIGNAL:
783 /*
784 * Not sure anybody will ever use this weird stuff. These
785 * ops can be used (under OSF/1) to set the fpcr that should
786 * be used when a signal handler starts executing.
787 */
788 break;
789
790 case GSI_UACPROC:
791 if (nbytes < sizeof(unsigned int))
792 return -EINVAL;
793 w = current_thread_info()->status & UAC_BITMASK;
794 if (put_user(w, (unsigned int __user *)buffer))
795 return -EFAULT;
796 return 1;
797
798 case GSI_PROC_TYPE:
799 if (nbytes < sizeof(unsigned long))
800 return -EINVAL;
801 cpu = (struct percpu_struct*)
802 ((char*)hwrpb + hwrpb->processor_offset);
803 w = cpu->type;
804 if (put_user(w, (unsigned long __user*)buffer))
805 return -EFAULT;
806 return 1;
807
808 case GSI_GET_HWRPB:
809 if (nbytes > sizeof(*hwrpb))
810 return -EINVAL;
811 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
812 return -EFAULT;
813 return 1;
814
815 default:
816 break;
817 }
818
819 return -EOPNOTSUPP;
820 }
821
822 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
823 unsigned long, nbytes, int __user *, start, void __user *, arg)
824 {
825 switch (op) {
826 case SSI_IEEE_FP_CONTROL: {
827 unsigned long swcr, fpcr;
828 unsigned int *state;
829
830 /*
831 * Alpha Architecture Handbook 4.7.7.3:
832 * To be fully IEEE compiant, we must track the current IEEE
833 * exception state in software, because spurious bits can be
834 * set in the trap shadow of a software-complete insn.
835 */
836
837 if (get_user(swcr, (unsigned long __user *)buffer))
838 return -EFAULT;
839 state = &current_thread_info()->ieee_state;
840
841 /* Update softare trap enable bits. */
842 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
843
844 /* Update the real fpcr. */
845 fpcr = rdfpcr() & FPCR_DYN_MASK;
846 fpcr |= ieee_swcr_to_fpcr(swcr);
847 wrfpcr(fpcr);
848
849 return 0;
850 }
851
852 case SSI_IEEE_RAISE_EXCEPTION: {
853 unsigned long exc, swcr, fpcr, fex;
854 unsigned int *state;
855
856 if (get_user(exc, (unsigned long __user *)buffer))
857 return -EFAULT;
858 state = &current_thread_info()->ieee_state;
859 exc &= IEEE_STATUS_MASK;
860
861 /* Update softare trap enable bits. */
862 swcr = (*state & IEEE_SW_MASK) | exc;
863 *state |= exc;
864
865 /* Update the real fpcr. */
866 fpcr = rdfpcr();
867 fpcr |= ieee_swcr_to_fpcr(swcr);
868 wrfpcr(fpcr);
869
870 /* If any exceptions set by this call, and are unmasked,
871 send a signal. Old exceptions are not signaled. */
872 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
873 if (fex) {
874 siginfo_t info;
875 int si_code = 0;
876
877 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
878 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
879 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
880 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
881 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
882 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
883
884 info.si_signo = SIGFPE;
885 info.si_errno = 0;
886 info.si_code = si_code;
887 info.si_addr = NULL; /* FIXME */
888 send_sig_info(SIGFPE, &info, current);
889 }
890 return 0;
891 }
892
893 case SSI_IEEE_STATE_AT_SIGNAL:
894 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
895 /*
896 * Not sure anybody will ever use this weird stuff. These
897 * ops can be used (under OSF/1) to set the fpcr that should
898 * be used when a signal handler starts executing.
899 */
900 break;
901
902 case SSI_NVPAIRS: {
903 unsigned __user *p = buffer;
904 unsigned i;
905
906 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
907 unsigned v, w, status;
908
909 if (get_user(v, p) || get_user(w, p + 1))
910 return -EFAULT;
911 switch (v) {
912 case SSIN_UACPROC:
913 w &= UAC_BITMASK;
914 status = current_thread_info()->status;
915 status = (status & ~UAC_BITMASK) | w;
916 current_thread_info()->status = status;
917 break;
918
919 default:
920 return -EOPNOTSUPP;
921 }
922 }
923 return 0;
924 }
925
926 case SSI_LMF:
927 return 0;
928
929 default:
930 break;
931 }
932
933 return -EOPNOTSUPP;
934 }
935
936 /* Translations due to the fact that OSF's time_t is an int. Which
937 affects all sorts of things, like timeval and itimerval. */
938
939 extern struct timezone sys_tz;
940
941 struct timeval32
942 {
943 int tv_sec, tv_usec;
944 };
945
946 struct itimerval32
947 {
948 struct timeval32 it_interval;
949 struct timeval32 it_value;
950 };
951
952 static inline long
953 get_tv32(struct timespec64 *o, struct timeval32 __user *i)
954 {
955 struct timeval32 tv;
956 if (copy_from_user(&tv, i, sizeof(struct timeval32)))
957 return -EFAULT;
958 o->tv_sec = tv.tv_sec;
959 o->tv_nsec = tv.tv_usec * NSEC_PER_USEC;
960 return 0;
961 }
962
963 static inline long
964 put_tv32(struct timeval32 __user *o, struct timespec64 *i)
965 {
966 return copy_to_user(o, &(struct timeval32){
967 .tv_sec = i->tv_sec,
968 .tv_usec = i->tv_nsec / NSEC_PER_USEC},
969 sizeof(struct timeval32));
970 }
971
972 static inline long
973 put_tv_to_tv32(struct timeval32 __user *o, struct timeval *i)
974 {
975 return copy_to_user(o, &(struct timeval32){
976 .tv_sec = i->tv_sec,
977 .tv_usec = i->tv_usec},
978 sizeof(struct timeval32));
979 }
980
981 static inline long
982 get_it32(struct itimerval *o, struct itimerval32 __user *i)
983 {
984 struct itimerval32 itv;
985 if (copy_from_user(&itv, i, sizeof(struct itimerval32)))
986 return -EFAULT;
987 o->it_interval.tv_sec = itv.it_interval.tv_sec;
988 o->it_interval.tv_usec = itv.it_interval.tv_usec;
989 o->it_value.tv_sec = itv.it_value.tv_sec;
990 o->it_value.tv_usec = itv.it_value.tv_usec;
991 return 0;
992 }
993
994 static inline long
995 put_it32(struct itimerval32 __user *o, struct itimerval *i)
996 {
997 return copy_to_user(o, &(struct itimerval32){
998 .it_interval.tv_sec = o->it_interval.tv_sec,
999 .it_interval.tv_usec = o->it_interval.tv_usec,
1000 .it_value.tv_sec = o->it_value.tv_sec,
1001 .it_value.tv_usec = o->it_value.tv_usec},
1002 sizeof(struct itimerval32));
1003 }
1004
1005 static inline void
1006 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
1007 {
1008 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
1009 value->tv_sec = jiffies / HZ;
1010 }
1011
1012 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
1013 struct timezone __user *, tz)
1014 {
1015 if (tv) {
1016 struct timespec64 kts;
1017
1018 ktime_get_real_ts64(&kts);
1019 if (put_tv32(tv, &kts))
1020 return -EFAULT;
1021 }
1022 if (tz) {
1023 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
1024 return -EFAULT;
1025 }
1026 return 0;
1027 }
1028
1029 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
1030 struct timezone __user *, tz)
1031 {
1032 struct timespec64 kts;
1033 struct timezone ktz;
1034
1035 if (tv) {
1036 if (get_tv32(&kts, tv))
1037 return -EFAULT;
1038 }
1039 if (tz) {
1040 if (copy_from_user(&ktz, tz, sizeof(*tz)))
1041 return -EFAULT;
1042 }
1043
1044 return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL);
1045 }
1046
1047 asmlinkage long sys_ni_posix_timers(void);
1048
1049 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
1050 {
1051 struct itimerval kit;
1052 int error;
1053
1054 if (!IS_ENABLED(CONFIG_POSIX_TIMERS))
1055 return sys_ni_posix_timers();
1056
1057 error = do_getitimer(which, &kit);
1058 if (!error && put_it32(it, &kit))
1059 error = -EFAULT;
1060
1061 return error;
1062 }
1063
1064 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
1065 struct itimerval32 __user *, out)
1066 {
1067 struct itimerval kin, kout;
1068 int error;
1069
1070 if (!IS_ENABLED(CONFIG_POSIX_TIMERS))
1071 return sys_ni_posix_timers();
1072
1073 if (in) {
1074 if (get_it32(&kin, in))
1075 return -EFAULT;
1076 } else
1077 memset(&kin, 0, sizeof(kin));
1078
1079 error = do_setitimer(which, &kin, out ? &kout : NULL);
1080 if (error || !out)
1081 return error;
1082
1083 if (put_it32(out, &kout))
1084 return -EFAULT;
1085
1086 return 0;
1087
1088 }
1089
1090 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1091 struct timeval32 __user *, tvs)
1092 {
1093 struct timespec64 tv[2];
1094
1095 if (tvs) {
1096 if (get_tv32(&tv[0], &tvs[0]) ||
1097 get_tv32(&tv[1], &tvs[1]))
1098 return -EFAULT;
1099
1100 if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 ||
1101 tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000)
1102 return -EINVAL;
1103 }
1104
1105 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1106 }
1107
1108 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1109 fd_set __user *, exp, struct timeval32 __user *, tvp)
1110 {
1111 struct timespec64 end_time, *to = NULL;
1112 if (tvp) {
1113 struct timespec64 tv;
1114 to = &end_time;
1115
1116 if (get_tv32(&tv, tvp))
1117 return -EFAULT;
1118
1119 if (tv.tv_sec < 0 || tv.tv_nsec < 0)
1120 return -EINVAL;
1121
1122 if (poll_select_set_timeout(to, tv.tv_sec, tv.tv_nsec))
1123 return -EINVAL;
1124
1125 }
1126
1127 /* OSF does not copy back the remaining time. */
1128 return core_sys_select(n, inp, outp, exp, to);
1129 }
1130
1131 struct rusage32 {
1132 struct timeval32 ru_utime; /* user time used */
1133 struct timeval32 ru_stime; /* system time used */
1134 long ru_maxrss; /* maximum resident set size */
1135 long ru_ixrss; /* integral shared memory size */
1136 long ru_idrss; /* integral unshared data size */
1137 long ru_isrss; /* integral unshared stack size */
1138 long ru_minflt; /* page reclaims */
1139 long ru_majflt; /* page faults */
1140 long ru_nswap; /* swaps */
1141 long ru_inblock; /* block input operations */
1142 long ru_oublock; /* block output operations */
1143 long ru_msgsnd; /* messages sent */
1144 long ru_msgrcv; /* messages received */
1145 long ru_nsignals; /* signals received */
1146 long ru_nvcsw; /* voluntary context switches */
1147 long ru_nivcsw; /* involuntary " */
1148 };
1149
1150 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1151 {
1152 struct rusage32 r;
1153 u64 utime, stime;
1154 unsigned long utime_jiffies, stime_jiffies;
1155
1156 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1157 return -EINVAL;
1158
1159 memset(&r, 0, sizeof(r));
1160 switch (who) {
1161 case RUSAGE_SELF:
1162 task_cputime(current, &utime, &stime);
1163 utime_jiffies = nsecs_to_jiffies(utime);
1164 stime_jiffies = nsecs_to_jiffies(stime);
1165 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1166 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1167 r.ru_minflt = current->min_flt;
1168 r.ru_majflt = current->maj_flt;
1169 break;
1170 case RUSAGE_CHILDREN:
1171 utime_jiffies = nsecs_to_jiffies(current->signal->cutime);
1172 stime_jiffies = nsecs_to_jiffies(current->signal->cstime);
1173 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1174 jiffies_to_timeval32(stime_jiffies, &r.ru_stime);
1175 r.ru_minflt = current->signal->cmin_flt;
1176 r.ru_majflt = current->signal->cmaj_flt;
1177 break;
1178 }
1179
1180 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1181 }
1182
1183 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1184 struct rusage32 __user *, ur)
1185 {
1186 unsigned int status = 0;
1187 struct rusage r;
1188 long err = kernel_wait4(pid, &status, options, &r);
1189 if (err <= 0)
1190 return err;
1191 if (put_user(status, ustatus))
1192 return -EFAULT;
1193 if (!ur)
1194 return err;
1195 if (put_tv_to_tv32(&ur->ru_utime, &r.ru_utime))
1196 return -EFAULT;
1197 if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime))
1198 return -EFAULT;
1199 if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss,
1200 sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss)))
1201 return -EFAULT;
1202 return err;
1203 }
1204
1205 /*
1206 * I don't know what the parameters are: the first one
1207 * seems to be a timeval pointer, and I suspect the second
1208 * one is the time remaining.. Ho humm.. No documentation.
1209 */
1210 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1211 struct timeval32 __user *, remain)
1212 {
1213 struct timespec64 tmp;
1214 unsigned long ticks;
1215
1216 if (get_tv32(&tmp, sleep))
1217 goto fault;
1218
1219 ticks = timespec64_to_jiffies(&tmp);
1220
1221 ticks = schedule_timeout_interruptible(ticks);
1222
1223 if (remain) {
1224 jiffies_to_timespec64(ticks, &tmp);
1225 if (put_tv32(remain, &tmp))
1226 goto fault;
1227 }
1228
1229 return 0;
1230 fault:
1231 return -EFAULT;
1232 }
1233
1234
1235 struct timex32 {
1236 unsigned int modes; /* mode selector */
1237 long offset; /* time offset (usec) */
1238 long freq; /* frequency offset (scaled ppm) */
1239 long maxerror; /* maximum error (usec) */
1240 long esterror; /* estimated error (usec) */
1241 int status; /* clock command/status */
1242 long constant; /* pll time constant */
1243 long precision; /* clock precision (usec) (read only) */
1244 long tolerance; /* clock frequency tolerance (ppm)
1245 * (read only)
1246 */
1247 struct timeval32 time; /* (read only) */
1248 long tick; /* (modified) usecs between clock ticks */
1249
1250 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1251 long jitter; /* pps jitter (us) (ro) */
1252 int shift; /* interval duration (s) (shift) (ro) */
1253 long stabil; /* pps stability (scaled ppm) (ro) */
1254 long jitcnt; /* jitter limit exceeded (ro) */
1255 long calcnt; /* calibration intervals (ro) */
1256 long errcnt; /* calibration errors (ro) */
1257 long stbcnt; /* stability limit exceeded (ro) */
1258
1259 int :32; int :32; int :32; int :32;
1260 int :32; int :32; int :32; int :32;
1261 int :32; int :32; int :32; int :32;
1262 };
1263
1264 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1265 {
1266 struct timex txc;
1267 int ret;
1268
1269 /* copy relevant bits of struct timex. */
1270 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1271 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1272 offsetof(struct timex32, tick)))
1273 return -EFAULT;
1274
1275 ret = do_adjtimex(&txc);
1276 if (ret < 0)
1277 return ret;
1278
1279 /* copy back to timex32 */
1280 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1281 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1282 offsetof(struct timex32, tick))) ||
1283 (put_tv_to_tv32(&txc_p->time, &txc.time)))
1284 return -EFAULT;
1285
1286 return ret;
1287 }
1288
1289 /* Get an address range which is currently unmapped. Similar to the
1290 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1291
1292 static unsigned long
1293 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1294 unsigned long limit)
1295 {
1296 struct vm_unmapped_area_info info;
1297
1298 info.flags = 0;
1299 info.length = len;
1300 info.low_limit = addr;
1301 info.high_limit = limit;
1302 info.align_mask = 0;
1303 info.align_offset = 0;
1304 return vm_unmapped_area(&info);
1305 }
1306
1307 unsigned long
1308 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1309 unsigned long len, unsigned long pgoff,
1310 unsigned long flags)
1311 {
1312 unsigned long limit;
1313
1314 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1315 if (current->personality & ADDR_LIMIT_32BIT)
1316 limit = 0x80000000;
1317 else
1318 limit = TASK_SIZE;
1319
1320 if (len > limit)
1321 return -ENOMEM;
1322
1323 if (flags & MAP_FIXED)
1324 return addr;
1325
1326 /* First, see if the given suggestion fits.
1327
1328 The OSF/1 loader (/sbin/loader) relies on us returning an
1329 address larger than the requested if one exists, which is
1330 a terribly broken way to program.
1331
1332 That said, I can see the use in being able to suggest not
1333 merely specific addresses, but regions of memory -- perhaps
1334 this feature should be incorporated into all ports? */
1335
1336 if (addr) {
1337 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1338 if (addr != (unsigned long) -ENOMEM)
1339 return addr;
1340 }
1341
1342 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1343 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1344 len, limit);
1345 if (addr != (unsigned long) -ENOMEM)
1346 return addr;
1347
1348 /* Finally, try allocating in low memory. */
1349 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1350
1351 return addr;
1352 }
1353
1354 #ifdef CONFIG_OSF4_COMPAT
1355
1356 /* Clear top 32 bits of iov_len in the user's buffer for
1357 compatibility with old versions of OSF/1 where iov_len
1358 was defined as int. */
1359 static int
1360 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1361 {
1362 unsigned long i;
1363
1364 for (i = 0 ; i < count ; i++) {
1365 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1366
1367 if (put_user(0, iov_len_high))
1368 return -EFAULT;
1369 }
1370 return 0;
1371 }
1372
1373 SYSCALL_DEFINE3(osf_readv, 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_readv(fd, vector, count);
1380 }
1381
1382 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1383 const struct iovec __user *, vector, unsigned long, count)
1384 {
1385 if (unlikely(personality(current->personality) == PER_OSF4))
1386 if (osf_fix_iov_len(vector, count))
1387 return -EFAULT;
1388 return sys_writev(fd, vector, count);
1389 }
1390
1391 #endif
1392
1393 SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1394 {
1395 int prio = sys_getpriority(which, who);
1396 if (prio >= 0) {
1397 /* Return value is the unbiased priority, i.e. 20 - prio.
1398 This does result in negative return values, so signal
1399 no error */
1400 force_successful_syscall_return();
1401 prio = 20 - prio;
1402 }
1403 return prio;
1404 }
1405
1406 SYSCALL_DEFINE0(getxuid)
1407 {
1408 current_pt_regs()->r20 = sys_geteuid();
1409 return sys_getuid();
1410 }
1411
1412 SYSCALL_DEFINE0(getxgid)
1413 {
1414 current_pt_regs()->r20 = sys_getegid();
1415 return sys_getgid();
1416 }
1417
1418 SYSCALL_DEFINE0(getxpid)
1419 {
1420 current_pt_regs()->r20 = sys_getppid();
1421 return sys_getpid();
1422 }
1423
1424 SYSCALL_DEFINE0(alpha_pipe)
1425 {
1426 int fd[2];
1427 int res = do_pipe_flags(fd, 0);
1428 if (!res) {
1429 /* The return values are in $0 and $20. */
1430 current_pt_regs()->r20 = fd[1];
1431 res = fd[0];
1432 }
1433 return res;
1434 }
1435
1436 SYSCALL_DEFINE1(sethae, unsigned long, val)
1437 {
1438 current_pt_regs()->hae = val;
1439 return 0;
1440 }
CRIS linux kernel tree