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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/mount.h>
40#include <linux/uio.h>
41#include <linux/vfs.h>
42#include <linux/rcupdate.h>
43#include <linux/slab.h>
44
45#include <asm/fpu.h>
46#include <asm/io.h>
47#include <linux/uaccess.h>
48#include <asm/sysinfo.h>
49#include <asm/thread_info.h>
50#include <asm/hwrpb.h>
51#include <asm/processor.h>
52
53/*
54 * Brk needs to return an error. Still support Linux's brk(0) query idiom,
55 * which OSF programs just shouldn't be doing. We're still not quite
56 * identical to OSF as we don't return 0 on success, but doing otherwise
57 * would require changes to libc. Hopefully this is good enough.
58 */
59SYSCALL_DEFINE1(osf_brk, unsigned long, brk)
60{
61 unsigned long retval = sys_brk(brk);
62 if (brk && brk != retval)
63 retval = -ENOMEM;
64 return retval;
65}
66
67/*
68 * This is pure guess-work..
69 */
70SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start,
71 unsigned long, text_len, unsigned long, bss_start,
72 unsigned long, bss_len)
73{
74 struct mm_struct *mm;
75
76 mm = current->mm;
77 mm->end_code = bss_start + bss_len;
78 mm->start_brk = bss_start + bss_len;
79 mm->brk = bss_start + bss_len;
80#if 0
81 printk("set_program_attributes(%lx %lx %lx %lx)\n",
82 text_start, text_len, bss_start, bss_len);
83#endif
84 return 0;
85}
86
87/*
88 * OSF/1 directory handling functions...
89 *
90 * The "getdents()" interface is much more sane: the "basep" stuff is
91 * braindamage (it can't really handle filesystems where the directory
92 * offset differences aren't the same as "d_reclen").
93 */
94#define NAME_OFFSET offsetof (struct osf_dirent, d_name)
95
96struct osf_dirent {
97 unsigned int d_ino;
98 unsigned short d_reclen;
99 unsigned short d_namlen;
100 char d_name[];
101};
102
103struct osf_dirent_callback {
104 struct dir_context ctx;
105 struct osf_dirent __user *dirent;
106 long __user *basep;
107 unsigned int count;
108 int error;
109};
110
111static bool
112osf_filldir(struct dir_context *ctx, const char *name, int namlen,
113 loff_t offset, u64 ino, unsigned int d_type)
114{
115 struct osf_dirent __user *dirent;
116 struct osf_dirent_callback *buf =
117 container_of(ctx, struct osf_dirent_callback, ctx);
118 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
119 unsigned int d_ino;
120
121 buf->error = -EINVAL; /* only used if we fail */
122 if (reclen > buf->count)
123 return false;
124 d_ino = ino;
125 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
126 buf->error = -EOVERFLOW;
127 return false;
128 }
129 if (buf->basep) {
130 if (put_user(offset, buf->basep))
131 goto Efault;
132 buf->basep = NULL;
133 }
134 dirent = buf->dirent;
135 if (put_user(d_ino, &dirent->d_ino) ||
136 put_user(namlen, &dirent->d_namlen) ||
137 put_user(reclen, &dirent->d_reclen) ||
138 copy_to_user(to: dirent->d_name, from: name, n: namlen) ||
139 put_user(0, dirent->d_name + namlen))
140 goto Efault;
141 dirent = (void __user *)dirent + reclen;
142 buf->dirent = dirent;
143 buf->count -= reclen;
144 return true;
145Efault:
146 buf->error = -EFAULT;
147 return false;
148}
149
150SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
151 struct osf_dirent __user *, dirent, unsigned int, count,
152 long __user *, basep)
153{
154 int error;
155 CLASS(fd_pos, arg)(fd);
156 struct osf_dirent_callback buf = {
157 .ctx.actor = osf_filldir,
158 .dirent = dirent,
159 .basep = basep,
160 .count = count
161 };
162
163 if (fd_empty(f: arg))
164 return -EBADF;
165
166 error = iterate_dir(fd_file(arg), &buf.ctx);
167 if (error >= 0)
168 error = buf.error;
169 if (count != buf.count)
170 error = count - buf.count;
171
172 return error;
173}
174
175#undef NAME_OFFSET
176
177SYSCALL_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, pgoff: off >> PAGE_SHIFT);
193 out:
194 return ret;
195}
196
197struct 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 */
235struct 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
248struct 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
276static int
277linux_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(), uid: lstat->uid);
285 tmp.st_gid = from_kgid_munged(current_user_ns(), gid: 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(to: osf_stat, from: &tmp, n: sizeof(tmp)) ? -EFAULT : 0;
300}
301
302static int
303linux_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(to: osf_stat, from: &tmp_stat, n: bufsiz) ? -EFAULT : 0;
321}
322
323static int
324linux_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(to: osf_stat, from: &tmp_stat, n: bufsiz) ? -EFAULT : 0;
341}
342
343SYSCALL_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: &linux_stat, osf_stat: buffer, bufsiz);
350 return error;
351}
352
353SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
354{
355 struct kstat stat;
356 int error;
357
358 error = vfs_stat(filename: name, stat: &stat);
359 if (error)
360 return error;
361
362 return linux_to_osf_stat(lstat: &stat, osf_stat: buf);
363}
364
365SYSCALL_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: &stat);
371 if (error)
372 return error;
373
374 return linux_to_osf_stat(lstat: &stat, osf_stat: buf);
375}
376
377SYSCALL_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: &stat);
383 if (error)
384 return error;
385
386 return linux_to_osf_stat(lstat: &stat, osf_stat: buf);
387}
388
389SYSCALL_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: &linux_stat, osf_stat: buffer, bufsiz);
396 return error;
397}
398
399SYSCALL_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: &linux_stat, osf_stat: buffer, bufsiz);
406 return error;
407}
408
409SYSCALL_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: &linux_stat, osf_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 */
424struct ufs_args {
425 char __user *devname;
426 int flags;
427 uid_t exroot;
428};
429
430struct 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
439struct 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 */
453static int
454osf_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(to: &tmp, from: args, n: sizeof(tmp)))
463 goto out;
464 devname = getname(name: tmp.devname);
465 retval = PTR_ERR(ptr: devname);
466 if (IS_ERR(ptr: devname))
467 goto out;
468 retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
469 putname(name: devname);
470 out:
471 return retval;
472}
473
474static int
475osf_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(to: &tmp, from: args, n: sizeof(tmp)))
484 goto out;
485 devname = getname(name: tmp.devname);
486 retval = PTR_ERR(ptr: devname);
487 if (IS_ERR(ptr: devname))
488 goto out;
489 retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
490 putname(name: devname);
491 out:
492 return retval;
493}
494
495static int
496osf_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(to: &tmp, from: args, n: sizeof(tmp)))
502 return -EFAULT;
503
504 return do_mount("", dirname, "proc", flags, NULL);
505}
506
507SYSCALL_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(dirname: path, args: data, flags: flag);
515 break;
516 case 6:
517 retval = osf_cdfs_mount(dirname: path, args: data, flags: flag);
518 break;
519 case 9:
520 retval = osf_procfs_mount(dirname: path, args: data, flags: flag);
521 break;
522 default:
523 retval = -EINVAL;
524 printk_ratelimited("osf_mount(%ld, %x)\n", typenr, flag);
525 }
526
527 return retval;
528}
529
530SYSCALL_DEFINE1(osf_utsname, char __user *, name)
531{
532 char tmp[5 * 32];
533
534 down_read(sem: &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(sem: &uts_sem);
541
542 if (copy_to_user(to: name, from: tmp, n: sizeof(tmp)))
543 return -EFAULT;
544 return 0;
545}
546
547SYSCALL_DEFINE0(getpagesize)
548{
549 return PAGE_SIZE;
550}
551
552SYSCALL_DEFINE0(getdtablesize)
553{
554 return sysctl_nr_open;
555}
556
557/*
558 * For compatibility with OSF/1 only. Use utsname(2) instead.
559 */
560SYSCALL_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(sem: &uts_sem);
570 kname = utsname()->domainname;
571 len = strnlen(p: kname, maxlen: namelen);
572 len = min(len + 1, namelen);
573 memcpy(tmp, kname, len);
574 up_read(sem: &uts_sem);
575
576 if (copy_to_user(to: name, from: tmp, n: 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
596struct proplistname_args {
597 unsigned int pl_mask;
598 unsigned int pl_numnames;
599 char **pl_names;
600};
601
602union 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
640enum 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
646SYSCALL_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
684SYSCALL_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(sp: 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(sp: 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
724SYSCALL_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(sem: &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(sem: &uts_sem);
756 if (copy_to_user(to: buf, from: tmp, n: len))
757 return -EFAULT;
758 return 0;
759}
760
761SYSCALL_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(to: buffer, from: hwrpb, n: nbytes) != 0)
808 return -EFAULT;
809 return 1;
810
811 default:
812 break;
813 }
814
815 return -EOPNOTSUPP;
816}
817
818SYSCALL_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 software 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 software 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_trapno(SIGFPE, code: si_code,
880 addr: (void __user *)NULL, /* FIXME */
881 trapno: 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
932extern struct timezone sys_tz;
933
934struct timeval32
935{
936 int tv_sec, tv_usec;
937};
938
939struct itimerval32
940{
941 struct timeval32 it_interval;
942 struct timeval32 it_value;
943};
944
945static inline long
946get_tv32(struct timespec64 *o, struct timeval32 __user *i)
947{
948 struct timeval32 tv;
949 if (copy_from_user(to: &tv, from: i, n: 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
956static inline long
957put_tv32(struct timeval32 __user *o, struct timespec64 *i)
958{
959 return copy_to_user(to: o, from: &(struct timeval32){
960 .tv_sec = i->tv_sec,
961 .tv_usec = i->tv_nsec / NSEC_PER_USEC},
962 n: sizeof(struct timeval32));
963}
964
965static inline long
966put_tv_to_tv32(struct timeval32 __user *o, struct __kernel_old_timeval *i)
967{
968 return copy_to_user(to: o, from: &(struct timeval32){
969 .tv_sec = i->tv_sec,
970 .tv_usec = i->tv_usec},
971 n: sizeof(struct timeval32));
972}
973
974static inline void
975jiffies_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
981SYSCALL_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(tv: &kts);
988 if (put_tv32(o: tv, i: &kts))
989 return -EFAULT;
990 }
991 if (tz) {
992 if (copy_to_user(to: tz, from: &sys_tz, n: sizeof(sys_tz)))
993 return -EFAULT;
994 }
995 return 0;
996}
997
998SYSCALL_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(o: &kts, i: tv))
1006 return -EFAULT;
1007 }
1008 if (tz) {
1009 if (copy_from_user(to: &ktz, from: tz, n: sizeof(*tz)))
1010 return -EFAULT;
1011 }
1012
1013 return do_sys_settimeofday64(tv: tv ? &kts : NULL, tz: tz ? &ktz : NULL);
1014}
1015
1016SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1017 struct timeval32 __user *, tvs)
1018{
1019 struct timespec64 tv[2];
1020
1021 if (tvs) {
1022 if (get_tv32(o: &tv[0], i: &tvs[0]) ||
1023 get_tv32(o: &tv[1], i: &tvs[1]))
1024 return -EFAULT;
1025
1026 if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 ||
1027 tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000)
1028 return -EINVAL;
1029 }
1030
1031 return do_utimes(AT_FDCWD, filename, times: tvs ? tv : NULL, flags: 0);
1032}
1033
1034SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1035 fd_set __user *, exp, struct timeval32 __user *, tvp)
1036{
1037 struct timespec64 end_time, *to = NULL;
1038 if (tvp) {
1039 struct timespec64 tv;
1040 to = &end_time;
1041
1042 if (get_tv32(o: &tv, i: tvp))
1043 return -EFAULT;
1044
1045 if (tv.tv_sec < 0 || tv.tv_nsec < 0)
1046 return -EINVAL;
1047
1048 if (poll_select_set_timeout(to, sec: tv.tv_sec, nsec: tv.tv_nsec))
1049 return -EINVAL;
1050
1051 }
1052
1053 /* OSF does not copy back the remaining time. */
1054 return core_sys_select(n, inp, outp, exp, end_time: to);
1055}
1056
1057struct rusage32 {
1058 struct timeval32 ru_utime; /* user time used */
1059 struct timeval32 ru_stime; /* system time used */
1060 long ru_maxrss; /* maximum resident set size */
1061 long ru_ixrss; /* integral shared memory size */
1062 long ru_idrss; /* integral unshared data size */
1063 long ru_isrss; /* integral unshared stack size */
1064 long ru_minflt; /* page reclaims */
1065 long ru_majflt; /* page faults */
1066 long ru_nswap; /* swaps */
1067 long ru_inblock; /* block input operations */
1068 long ru_oublock; /* block output operations */
1069 long ru_msgsnd; /* messages sent */
1070 long ru_msgrcv; /* messages received */
1071 long ru_nsignals; /* signals received */
1072 long ru_nvcsw; /* voluntary context switches */
1073 long ru_nivcsw; /* involuntary " */
1074};
1075
1076SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1077{
1078 struct rusage32 r;
1079 u64 utime, stime;
1080 unsigned long utime_jiffies, stime_jiffies;
1081
1082 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1083 return -EINVAL;
1084
1085 memset(&r, 0, sizeof(r));
1086 switch (who) {
1087 case RUSAGE_SELF:
1088 task_cputime(current, utime: &utime, stime: &stime);
1089 utime_jiffies = nsecs_to_jiffies(n: utime);
1090 stime_jiffies = nsecs_to_jiffies(n: stime);
1091 jiffies_to_timeval32(jiffies: utime_jiffies, value: &r.ru_utime);
1092 jiffies_to_timeval32(jiffies: stime_jiffies, value: &r.ru_stime);
1093 r.ru_minflt = current->min_flt;
1094 r.ru_majflt = current->maj_flt;
1095 break;
1096 case RUSAGE_CHILDREN:
1097 utime_jiffies = nsecs_to_jiffies(current->signal->cutime);
1098 stime_jiffies = nsecs_to_jiffies(current->signal->cstime);
1099 jiffies_to_timeval32(jiffies: utime_jiffies, value: &r.ru_utime);
1100 jiffies_to_timeval32(jiffies: stime_jiffies, value: &r.ru_stime);
1101 r.ru_minflt = current->signal->cmin_flt;
1102 r.ru_majflt = current->signal->cmaj_flt;
1103 break;
1104 }
1105
1106 return copy_to_user(to: ru, from: &r, n: sizeof(r)) ? -EFAULT : 0;
1107}
1108
1109SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1110 struct rusage32 __user *, ur)
1111{
1112 struct rusage r;
1113 long err = kernel_wait4(pid, ustatus, options, &r);
1114 if (err <= 0)
1115 return err;
1116 if (!ur)
1117 return err;
1118 if (put_tv_to_tv32(o: &ur->ru_utime, i: &r.ru_utime))
1119 return -EFAULT;
1120 if (put_tv_to_tv32(o: &ur->ru_stime, i: &r.ru_stime))
1121 return -EFAULT;
1122 if (copy_to_user(to: &ur->ru_maxrss, from: &r.ru_maxrss,
1123 n: sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss)))
1124 return -EFAULT;
1125 return err;
1126}
1127
1128/*
1129 * I don't know what the parameters are: the first one
1130 * seems to be a timeval pointer, and I suspect the second
1131 * one is the time remaining.. Ho humm.. No documentation.
1132 */
1133SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1134 struct timeval32 __user *, remain)
1135{
1136 struct timespec64 tmp;
1137 unsigned long ticks;
1138
1139 if (get_tv32(o: &tmp, i: sleep))
1140 goto fault;
1141
1142 ticks = timespec64_to_jiffies(value: &tmp);
1143
1144 ticks = schedule_timeout_interruptible(timeout: ticks);
1145
1146 if (remain) {
1147 jiffies_to_timespec64(jiffies: ticks, value: &tmp);
1148 if (put_tv32(o: remain, i: &tmp))
1149 goto fault;
1150 }
1151
1152 return 0;
1153 fault:
1154 return -EFAULT;
1155}
1156
1157
1158struct timex32 {
1159 unsigned int modes; /* mode selector */
1160 long offset; /* time offset (usec) */
1161 long freq; /* frequency offset (scaled ppm) */
1162 long maxerror; /* maximum error (usec) */
1163 long esterror; /* estimated error (usec) */
1164 int status; /* clock command/status */
1165 long constant; /* pll time constant */
1166 long precision; /* clock precision (usec) (read only) */
1167 long tolerance; /* clock frequency tolerance (ppm)
1168 * (read only)
1169 */
1170 struct timeval32 time; /* (read only) */
1171 long tick; /* (modified) usecs between clock ticks */
1172
1173 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1174 long jitter; /* pps jitter (us) (ro) */
1175 int shift; /* interval duration (s) (shift) (ro) */
1176 long stabil; /* pps stability (scaled ppm) (ro) */
1177 long jitcnt; /* jitter limit exceeded (ro) */
1178 long calcnt; /* calibration intervals (ro) */
1179 long errcnt; /* calibration errors (ro) */
1180 long stbcnt; /* stability limit exceeded (ro) */
1181
1182 int :32; int :32; int :32; int :32;
1183 int :32; int :32; int :32; int :32;
1184 int :32; int :32; int :32; int :32;
1185};
1186
1187SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1188{
1189 struct __kernel_timex txc;
1190 int ret;
1191
1192 /* copy relevant bits of struct timex. */
1193 if (copy_from_user(to: &txc, from: txc_p, offsetof(struct timex32, time)) ||
1194 copy_from_user(to: &txc.tick, from: &txc_p->tick, n: sizeof(struct timex32) -
1195 offsetof(struct timex32, tick)))
1196 return -EFAULT;
1197
1198 ret = do_adjtimex(&txc);
1199 if (ret < 0)
1200 return ret;
1201
1202 /* copy back to timex32 */
1203 if (copy_to_user(to: txc_p, from: &txc, offsetof(struct timex32, time)) ||
1204 (copy_to_user(to: &txc_p->tick, from: &txc.tick, n: sizeof(struct timex32) -
1205 offsetof(struct timex32, tick))) ||
1206 (put_user(txc.time.tv_sec, &txc_p->time.tv_sec)) ||
1207 (put_user(txc.time.tv_usec, &txc_p->time.tv_usec)))
1208 return -EFAULT;
1209
1210 return ret;
1211}
1212
1213/* Get an address range which is currently unmapped. */
1214
1215static unsigned long
1216arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1217 unsigned long limit)
1218{
1219 struct vm_unmapped_area_info info = {};
1220
1221 info.length = len;
1222 info.low_limit = addr;
1223 info.high_limit = limit;
1224 return vm_unmapped_area(info: &info);
1225}
1226
1227unsigned long
1228arch_get_unmapped_area(struct file *filp, unsigned long addr,
1229 unsigned long len, unsigned long pgoff,
1230 unsigned long flags, vm_flags_t vm_flags)
1231{
1232 unsigned long limit = TASK_SIZE;
1233
1234 if (len > limit)
1235 return -ENOMEM;
1236
1237 if (flags & MAP_FIXED)
1238 return addr;
1239
1240 /* First, see if the given suggestion fits.
1241
1242 The OSF/1 loader (/sbin/loader) relies on us returning an
1243 address larger than the requested if one exists, which is
1244 a terribly broken way to program.
1245
1246 That said, I can see the use in being able to suggest not
1247 merely specific addresses, but regions of memory -- perhaps
1248 this feature should be incorporated into all ports? */
1249
1250 if (addr) {
1251 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1252 if (addr != (unsigned long) -ENOMEM)
1253 return addr;
1254 }
1255
1256 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1257 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1258 len, limit);
1259 if (addr != (unsigned long) -ENOMEM)
1260 return addr;
1261
1262 /* Finally, try allocating in low memory. */
1263 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1264
1265 return addr;
1266}
1267
1268SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1269{
1270 int prio = sys_getpriority(which, who);
1271 if (prio >= 0) {
1272 /* Return value is the unbiased priority, i.e. 20 - prio.
1273 This does result in negative return values, so signal
1274 no error */
1275 force_successful_syscall_return();
1276 prio = 20 - prio;
1277 }
1278 return prio;
1279}
1280
1281SYSCALL_DEFINE0(getxuid)
1282{
1283 current_pt_regs()->r20 = sys_geteuid();
1284 return sys_getuid();
1285}
1286
1287SYSCALL_DEFINE0(getxgid)
1288{
1289 current_pt_regs()->r20 = sys_getegid();
1290 return sys_getgid();
1291}
1292
1293SYSCALL_DEFINE0(getxpid)
1294{
1295 current_pt_regs()->r20 = sys_getppid();
1296 return sys_getpid();
1297}
1298
1299SYSCALL_DEFINE0(alpha_pipe)
1300{
1301 int fd[2];
1302 int res = do_pipe_flags(fd, 0);
1303 if (!res) {
1304 /* The return values are in $0 and $20. */
1305 current_pt_regs()->r20 = fd[1];
1306 res = fd[0];
1307 }
1308 return res;
1309}
1310
1311SYSCALL_DEFINE1(sethae, unsigned long, val)
1312{
1313 current_pt_regs()->hae = val;
1314 return 0;
1315}
1316

source code of linux/arch/alpha/kernel/osf_sys.c