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 struct fd arg = fdget_pos(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 (!arg.file)
164 return -EBADF;
165
166 error = iterate_dir(arg.file, &buf.ctx);
167 if (error >= 0)
168 error = buf.error;
169 if (count != buf.count)
170 error = count - buf.count;
171
172 fdput_pos(f: arg);
173 return error;
174}
175
176#undef NAME_OFFSET
177
178SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
179 unsigned long, prot, unsigned long, flags, unsigned long, fd,
180 unsigned long, off)
181{
182 unsigned long ret = -EINVAL;
183
184#if 0
185 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
186 printk("%s: unimplemented OSF mmap flags %04lx\n",
187 current->comm, flags);
188#endif
189 if ((off + PAGE_ALIGN(len)) < off)
190 goto out;
191 if (off & ~PAGE_MASK)
192 goto out;
193 ret = ksys_mmap_pgoff(addr, len, prot, flags, fd, pgoff: off >> PAGE_SHIFT);
194 out:
195 return ret;
196}
197
198struct osf_stat {
199 int st_dev;
200 int st_pad1;
201 unsigned st_mode;
202 unsigned short st_nlink;
203 short st_nlink_reserved;
204 unsigned st_uid;
205 unsigned st_gid;
206 int st_rdev;
207 int st_ldev;
208 long st_size;
209 int st_pad2;
210 int st_uatime;
211 int st_pad3;
212 int st_umtime;
213 int st_pad4;
214 int st_uctime;
215 int st_pad5;
216 int st_pad6;
217 unsigned st_flags;
218 unsigned st_gen;
219 long st_spare[4];
220 unsigned st_ino;
221 int st_ino_reserved;
222 int st_atime;
223 int st_atime_reserved;
224 int st_mtime;
225 int st_mtime_reserved;
226 int st_ctime;
227 int st_ctime_reserved;
228 long st_blksize;
229 long st_blocks;
230};
231
232/*
233 * The OSF/1 statfs structure is much larger, but this should
234 * match the beginning, at least.
235 */
236struct osf_statfs {
237 short f_type;
238 short f_flags;
239 int f_fsize;
240 int f_bsize;
241 int f_blocks;
242 int f_bfree;
243 int f_bavail;
244 int f_files;
245 int f_ffree;
246 __kernel_fsid_t f_fsid;
247};
248
249struct osf_statfs64 {
250 short f_type;
251 short f_flags;
252 int f_pad1;
253 int f_pad2;
254 int f_pad3;
255 int f_pad4;
256 int f_pad5;
257 int f_pad6;
258 int f_pad7;
259 __kernel_fsid_t f_fsid;
260 u_short f_namemax;
261 short f_reserved1;
262 int f_spare[8];
263 char f_pad8[90];
264 char f_pad9[90];
265 long mount_info[10];
266 u_long f_flags2;
267 long f_spare2[14];
268 long f_fsize;
269 long f_bsize;
270 long f_blocks;
271 long f_bfree;
272 long f_bavail;
273 long f_files;
274 long f_ffree;
275};
276
277static int
278linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat)
279{
280 struct osf_stat tmp = { 0 };
281
282 tmp.st_dev = lstat->dev;
283 tmp.st_mode = lstat->mode;
284 tmp.st_nlink = lstat->nlink;
285 tmp.st_uid = from_kuid_munged(current_user_ns(), uid: lstat->uid);
286 tmp.st_gid = from_kgid_munged(current_user_ns(), gid: lstat->gid);
287 tmp.st_rdev = lstat->rdev;
288 tmp.st_ldev = lstat->rdev;
289 tmp.st_size = lstat->size;
290 tmp.st_uatime = lstat->atime.tv_nsec / 1000;
291 tmp.st_umtime = lstat->mtime.tv_nsec / 1000;
292 tmp.st_uctime = lstat->ctime.tv_nsec / 1000;
293 tmp.st_ino = lstat->ino;
294 tmp.st_atime = lstat->atime.tv_sec;
295 tmp.st_mtime = lstat->mtime.tv_sec;
296 tmp.st_ctime = lstat->ctime.tv_sec;
297 tmp.st_blksize = lstat->blksize;
298 tmp.st_blocks = lstat->blocks;
299
300 return copy_to_user(to: osf_stat, from: &tmp, n: sizeof(tmp)) ? -EFAULT : 0;
301}
302
303static int
304linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
305 unsigned long bufsiz)
306{
307 struct osf_statfs tmp_stat;
308
309 tmp_stat.f_type = linux_stat->f_type;
310 tmp_stat.f_flags = 0; /* mount flags */
311 tmp_stat.f_fsize = linux_stat->f_frsize;
312 tmp_stat.f_bsize = linux_stat->f_bsize;
313 tmp_stat.f_blocks = linux_stat->f_blocks;
314 tmp_stat.f_bfree = linux_stat->f_bfree;
315 tmp_stat.f_bavail = linux_stat->f_bavail;
316 tmp_stat.f_files = linux_stat->f_files;
317 tmp_stat.f_ffree = linux_stat->f_ffree;
318 tmp_stat.f_fsid = linux_stat->f_fsid;
319 if (bufsiz > sizeof(tmp_stat))
320 bufsiz = sizeof(tmp_stat);
321 return copy_to_user(to: osf_stat, from: &tmp_stat, n: bufsiz) ? -EFAULT : 0;
322}
323
324static int
325linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat,
326 unsigned long bufsiz)
327{
328 struct osf_statfs64 tmp_stat = { 0 };
329
330 tmp_stat.f_type = linux_stat->f_type;
331 tmp_stat.f_fsize = linux_stat->f_frsize;
332 tmp_stat.f_bsize = linux_stat->f_bsize;
333 tmp_stat.f_blocks = linux_stat->f_blocks;
334 tmp_stat.f_bfree = linux_stat->f_bfree;
335 tmp_stat.f_bavail = linux_stat->f_bavail;
336 tmp_stat.f_files = linux_stat->f_files;
337 tmp_stat.f_ffree = linux_stat->f_ffree;
338 tmp_stat.f_fsid = linux_stat->f_fsid;
339 if (bufsiz > sizeof(tmp_stat))
340 bufsiz = sizeof(tmp_stat);
341 return copy_to_user(to: osf_stat, from: &tmp_stat, n: bufsiz) ? -EFAULT : 0;
342}
343
344SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
345 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
346{
347 struct kstatfs linux_stat;
348 int error = user_statfs(pathname, &linux_stat);
349 if (!error)
350 error = linux_to_osf_statfs(linux_stat: &linux_stat, osf_stat: buffer, bufsiz);
351 return error;
352}
353
354SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
355{
356 struct kstat stat;
357 int error;
358
359 error = vfs_stat(filename: name, stat: &stat);
360 if (error)
361 return error;
362
363 return linux_to_osf_stat(lstat: &stat, osf_stat: buf);
364}
365
366SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf)
367{
368 struct kstat stat;
369 int error;
370
371 error = vfs_lstat(name, stat: &stat);
372 if (error)
373 return error;
374
375 return linux_to_osf_stat(lstat: &stat, osf_stat: buf);
376}
377
378SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf)
379{
380 struct kstat stat;
381 int error;
382
383 error = vfs_fstat(fd, stat: &stat);
384 if (error)
385 return error;
386
387 return linux_to_osf_stat(lstat: &stat, osf_stat: buf);
388}
389
390SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
391 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
392{
393 struct kstatfs linux_stat;
394 int error = fd_statfs(fd, &linux_stat);
395 if (!error)
396 error = linux_to_osf_statfs(linux_stat: &linux_stat, osf_stat: buffer, bufsiz);
397 return error;
398}
399
400SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname,
401 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
402{
403 struct kstatfs linux_stat;
404 int error = user_statfs(pathname, &linux_stat);
405 if (!error)
406 error = linux_to_osf_statfs64(linux_stat: &linux_stat, osf_stat: buffer, bufsiz);
407 return error;
408}
409
410SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd,
411 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
412{
413 struct kstatfs linux_stat;
414 int error = fd_statfs(fd, &linux_stat);
415 if (!error)
416 error = linux_to_osf_statfs64(linux_stat: &linux_stat, osf_stat: buffer, bufsiz);
417 return error;
418}
419
420/*
421 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
422 *
423 * Although to be frank, neither are the native Linux/i386 ones..
424 */
425struct ufs_args {
426 char __user *devname;
427 int flags;
428 uid_t exroot;
429};
430
431struct cdfs_args {
432 char __user *devname;
433 int flags;
434 uid_t exroot;
435
436 /* This has lots more here, which Linux handles with the option block
437 but I'm too lazy to do the translation into ASCII. */
438};
439
440struct procfs_args {
441 char __user *devname;
442 int flags;
443 uid_t exroot;
444};
445
446/*
447 * We can't actually handle ufs yet, so we translate UFS mounts to
448 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
449 * layout is so braindead it's a major headache doing it.
450 *
451 * Just how long ago was it written? OTOH our UFS driver may be still
452 * unhappy with OSF UFS. [CHECKME]
453 */
454static int
455osf_ufs_mount(const char __user *dirname,
456 struct ufs_args __user *args, int flags)
457{
458 int retval;
459 struct cdfs_args tmp;
460 struct filename *devname;
461
462 retval = -EFAULT;
463 if (copy_from_user(to: &tmp, from: args, n: sizeof(tmp)))
464 goto out;
465 devname = getname(tmp.devname);
466 retval = PTR_ERR(ptr: devname);
467 if (IS_ERR(ptr: devname))
468 goto out;
469 retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
470 putname(name: devname);
471 out:
472 return retval;
473}
474
475static int
476osf_cdfs_mount(const char __user *dirname,
477 struct cdfs_args __user *args, int flags)
478{
479 int retval;
480 struct cdfs_args tmp;
481 struct filename *devname;
482
483 retval = -EFAULT;
484 if (copy_from_user(to: &tmp, from: args, n: sizeof(tmp)))
485 goto out;
486 devname = getname(tmp.devname);
487 retval = PTR_ERR(ptr: devname);
488 if (IS_ERR(ptr: devname))
489 goto out;
490 retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
491 putname(name: devname);
492 out:
493 return retval;
494}
495
496static int
497osf_procfs_mount(const char __user *dirname,
498 struct procfs_args __user *args, int flags)
499{
500 struct procfs_args tmp;
501
502 if (copy_from_user(to: &tmp, from: args, n: sizeof(tmp)))
503 return -EFAULT;
504
505 return do_mount("", dirname, "proc", flags, NULL);
506}
507
508SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
509 int, flag, void __user *, data)
510{
511 int retval;
512
513 switch (typenr) {
514 case 1:
515 retval = osf_ufs_mount(dirname: path, args: data, flags: flag);
516 break;
517 case 6:
518 retval = osf_cdfs_mount(dirname: path, args: data, flags: flag);
519 break;
520 case 9:
521 retval = osf_procfs_mount(dirname: path, args: data, flags: flag);
522 break;
523 default:
524 retval = -EINVAL;
525 printk_ratelimited("osf_mount(%ld, %x)\n", typenr, flag);
526 }
527
528 return retval;
529}
530
531SYSCALL_DEFINE1(osf_utsname, char __user *, name)
532{
533 char tmp[5 * 32];
534
535 down_read(sem: &uts_sem);
536 memcpy(tmp + 0 * 32, utsname()->sysname, 32);
537 memcpy(tmp + 1 * 32, utsname()->nodename, 32);
538 memcpy(tmp + 2 * 32, utsname()->release, 32);
539 memcpy(tmp + 3 * 32, utsname()->version, 32);
540 memcpy(tmp + 4 * 32, utsname()->machine, 32);
541 up_read(sem: &uts_sem);
542
543 if (copy_to_user(to: name, from: tmp, n: sizeof(tmp)))
544 return -EFAULT;
545 return 0;
546}
547
548SYSCALL_DEFINE0(getpagesize)
549{
550 return PAGE_SIZE;
551}
552
553SYSCALL_DEFINE0(getdtablesize)
554{
555 return sysctl_nr_open;
556}
557
558/*
559 * For compatibility with OSF/1 only. Use utsname(2) instead.
560 */
561SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
562{
563 int len;
564 char *kname;
565 char tmp[32];
566
567 if (namelen < 0 || namelen > 32)
568 namelen = 32;
569
570 down_read(sem: &uts_sem);
571 kname = utsname()->domainname;
572 len = strnlen(p: kname, maxlen: namelen);
573 len = min(len + 1, namelen);
574 memcpy(tmp, kname, len);
575 up_read(sem: &uts_sem);
576
577 if (copy_to_user(to: name, from: tmp, n: len))
578 return -EFAULT;
579 return 0;
580}
581
582/*
583 * The following stuff should move into a header file should it ever
584 * be labeled "officially supported." Right now, there is just enough
585 * support to avoid applications (such as tar) printing error
586 * messages. The attributes are not really implemented.
587 */
588
589/*
590 * Values for Property list entry flag
591 */
592#define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
593 by default */
594#define PLE_FLAG_MASK 0x1 /* Valid flag values */
595#define PLE_FLAG_ALL -1 /* All flag value */
596
597struct proplistname_args {
598 unsigned int pl_mask;
599 unsigned int pl_numnames;
600 char **pl_names;
601};
602
603union pl_args {
604 struct setargs {
605 char __user *path;
606 long follow;
607 long nbytes;
608 char __user *buf;
609 } set;
610 struct fsetargs {
611 long fd;
612 long nbytes;
613 char __user *buf;
614 } fset;
615 struct getargs {
616 char __user *path;
617 long follow;
618 struct proplistname_args __user *name_args;
619 long nbytes;
620 char __user *buf;
621 int __user *min_buf_size;
622 } get;
623 struct fgetargs {
624 long fd;
625 struct proplistname_args __user *name_args;
626 long nbytes;
627 char __user *buf;
628 int __user *min_buf_size;
629 } fget;
630 struct delargs {
631 char __user *path;
632 long follow;
633 struct proplistname_args __user *name_args;
634 } del;
635 struct fdelargs {
636 long fd;
637 struct proplistname_args __user *name_args;
638 } fdel;
639};
640
641enum pl_code {
642 PL_SET = 1, PL_FSET = 2,
643 PL_GET = 3, PL_FGET = 4,
644 PL_DEL = 5, PL_FDEL = 6
645};
646
647SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
648 union pl_args __user *, args)
649{
650 long error;
651 int __user *min_buf_size_ptr;
652
653 switch (code) {
654 case PL_SET:
655 if (get_user(error, &args->set.nbytes))
656 error = -EFAULT;
657 break;
658 case PL_FSET:
659 if (get_user(error, &args->fset.nbytes))
660 error = -EFAULT;
661 break;
662 case PL_GET:
663 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
664 if (error)
665 break;
666 error = put_user(0, min_buf_size_ptr);
667 break;
668 case PL_FGET:
669 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
670 if (error)
671 break;
672 error = put_user(0, min_buf_size_ptr);
673 break;
674 case PL_DEL:
675 case PL_FDEL:
676 error = 0;
677 break;
678 default:
679 error = -EOPNOTSUPP;
680 break;
681 }
682 return error;
683}
684
685SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
686 struct sigstack __user *, uoss)
687{
688 unsigned long usp = rdusp();
689 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
690 unsigned long oss_os = on_sig_stack(sp: usp);
691 int error;
692
693 if (uss) {
694 void __user *ss_sp;
695
696 error = -EFAULT;
697 if (get_user(ss_sp, &uss->ss_sp))
698 goto out;
699
700 /* If the current stack was set with sigaltstack, don't
701 swap stacks while we are on it. */
702 error = -EPERM;
703 if (current->sas_ss_sp && on_sig_stack(sp: usp))
704 goto out;
705
706 /* Since we don't know the extent of the stack, and we don't
707 track onstack-ness, but rather calculate it, we must
708 presume a size. Ho hum this interface is lossy. */
709 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
710 current->sas_ss_size = SIGSTKSZ;
711 }
712
713 if (uoss) {
714 error = -EFAULT;
715 if (put_user(oss_sp, &uoss->ss_sp) ||
716 put_user(oss_os, &uoss->ss_onstack))
717 goto out;
718 }
719
720 error = 0;
721 out:
722 return error;
723}
724
725SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
726{
727 const char *sysinfo_table[] = {
728 utsname()->sysname,
729 utsname()->nodename,
730 utsname()->release,
731 utsname()->version,
732 utsname()->machine,
733 "alpha", /* instruction set architecture */
734 "dummy", /* hardware serial number */
735 "dummy", /* hardware manufacturer */
736 "dummy", /* secure RPC domain */
737 };
738 unsigned long offset;
739 const char *res;
740 long len;
741 char tmp[__NEW_UTS_LEN + 1];
742
743 offset = command-1;
744 if (offset >= ARRAY_SIZE(sysinfo_table)) {
745 /* Digital UNIX has a few unpublished interfaces here */
746 printk("sysinfo(%d)", command);
747 return -EINVAL;
748 }
749
750 down_read(sem: &uts_sem);
751 res = sysinfo_table[offset];
752 len = strlen(res)+1;
753 if ((unsigned long)len > (unsigned long)count)
754 len = count;
755 memcpy(tmp, res, len);
756 up_read(sem: &uts_sem);
757 if (copy_to_user(to: buf, from: tmp, n: len))
758 return -EFAULT;
759 return 0;
760}
761
762SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
763 unsigned long, nbytes, int __user *, start, void __user *, arg)
764{
765 unsigned long w;
766 struct percpu_struct *cpu;
767
768 switch (op) {
769 case GSI_IEEE_FP_CONTROL:
770 /* Return current software fp control & status bits. */
771 /* Note that DU doesn't verify available space here. */
772
773 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
774 w = swcr_update_status(w, rdfpcr());
775 if (put_user(w, (unsigned long __user *) buffer))
776 return -EFAULT;
777 return 0;
778
779 case GSI_IEEE_STATE_AT_SIGNAL:
780 /*
781 * Not sure anybody will ever use this weird stuff. These
782 * ops can be used (under OSF/1) to set the fpcr that should
783 * be used when a signal handler starts executing.
784 */
785 break;
786
787 case GSI_UACPROC:
788 if (nbytes < sizeof(unsigned int))
789 return -EINVAL;
790 w = current_thread_info()->status & UAC_BITMASK;
791 if (put_user(w, (unsigned int __user *)buffer))
792 return -EFAULT;
793 return 1;
794
795 case GSI_PROC_TYPE:
796 if (nbytes < sizeof(unsigned long))
797 return -EINVAL;
798 cpu = (struct percpu_struct*)
799 ((char*)hwrpb + hwrpb->processor_offset);
800 w = cpu->type;
801 if (put_user(w, (unsigned long __user*)buffer))
802 return -EFAULT;
803 return 1;
804
805 case GSI_GET_HWRPB:
806 if (nbytes > sizeof(*hwrpb))
807 return -EINVAL;
808 if (copy_to_user(to: buffer, from: hwrpb, n: nbytes) != 0)
809 return -EFAULT;
810 return 1;
811
812 default:
813 break;
814 }
815
816 return -EOPNOTSUPP;
817}
818
819SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
820 unsigned long, nbytes, int __user *, start, void __user *, arg)
821{
822 switch (op) {
823 case SSI_IEEE_FP_CONTROL: {
824 unsigned long swcr, fpcr;
825 unsigned int *state;
826
827 /*
828 * Alpha Architecture Handbook 4.7.7.3:
829 * To be fully IEEE compiant, we must track the current IEEE
830 * exception state in software, because spurious bits can be
831 * set in the trap shadow of a software-complete insn.
832 */
833
834 if (get_user(swcr, (unsigned long __user *)buffer))
835 return -EFAULT;
836 state = &current_thread_info()->ieee_state;
837
838 /* Update software trap enable bits. */
839 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
840
841 /* Update the real fpcr. */
842 fpcr = rdfpcr() & FPCR_DYN_MASK;
843 fpcr |= ieee_swcr_to_fpcr(swcr);
844 wrfpcr(fpcr);
845
846 return 0;
847 }
848
849 case SSI_IEEE_RAISE_EXCEPTION: {
850 unsigned long exc, swcr, fpcr, fex;
851 unsigned int *state;
852
853 if (get_user(exc, (unsigned long __user *)buffer))
854 return -EFAULT;
855 state = &current_thread_info()->ieee_state;
856 exc &= IEEE_STATUS_MASK;
857
858 /* Update software trap enable bits. */
859 swcr = (*state & IEEE_SW_MASK) | exc;
860 *state |= exc;
861
862 /* Update the real fpcr. */
863 fpcr = rdfpcr();
864 fpcr |= ieee_swcr_to_fpcr(swcr);
865 wrfpcr(fpcr);
866
867 /* If any exceptions set by this call, and are unmasked,
868 send a signal. Old exceptions are not signaled. */
869 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
870 if (fex) {
871 int si_code = FPE_FLTUNK;
872
873 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
874 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
875 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
876 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
877 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
878 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
879
880 send_sig_fault_trapno(SIGFPE, code: si_code,
881 addr: (void __user *)NULL, /* FIXME */
882 trapno: 0, current);
883 }
884 return 0;
885 }
886
887 case SSI_IEEE_STATE_AT_SIGNAL:
888 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
889 /*
890 * Not sure anybody will ever use this weird stuff. These
891 * ops can be used (under OSF/1) to set the fpcr that should
892 * be used when a signal handler starts executing.
893 */
894 break;
895
896 case SSI_NVPAIRS: {
897 unsigned __user *p = buffer;
898 unsigned i;
899
900 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
901 unsigned v, w, status;
902
903 if (get_user(v, p) || get_user(w, p + 1))
904 return -EFAULT;
905 switch (v) {
906 case SSIN_UACPROC:
907 w &= UAC_BITMASK;
908 status = current_thread_info()->status;
909 status = (status & ~UAC_BITMASK) | w;
910 current_thread_info()->status = status;
911 break;
912
913 default:
914 return -EOPNOTSUPP;
915 }
916 }
917 return 0;
918 }
919
920 case SSI_LMF:
921 return 0;
922
923 default:
924 break;
925 }
926
927 return -EOPNOTSUPP;
928}
929
930/* Translations due to the fact that OSF's time_t is an int. Which
931 affects all sorts of things, like timeval and itimerval. */
932
933extern struct timezone sys_tz;
934
935struct timeval32
936{
937 int tv_sec, tv_usec;
938};
939
940struct itimerval32
941{
942 struct timeval32 it_interval;
943 struct timeval32 it_value;
944};
945
946static inline long
947get_tv32(struct timespec64 *o, struct timeval32 __user *i)
948{
949 struct timeval32 tv;
950 if (copy_from_user(to: &tv, from: i, n: sizeof(struct timeval32)))
951 return -EFAULT;
952 o->tv_sec = tv.tv_sec;
953 o->tv_nsec = tv.tv_usec * NSEC_PER_USEC;
954 return 0;
955}
956
957static inline long
958put_tv32(struct timeval32 __user *o, struct timespec64 *i)
959{
960 return copy_to_user(to: o, from: &(struct timeval32){
961 .tv_sec = i->tv_sec,
962 .tv_usec = i->tv_nsec / NSEC_PER_USEC},
963 n: sizeof(struct timeval32));
964}
965
966static inline long
967put_tv_to_tv32(struct timeval32 __user *o, struct __kernel_old_timeval *i)
968{
969 return copy_to_user(to: o, from: &(struct timeval32){
970 .tv_sec = i->tv_sec,
971 .tv_usec = i->tv_usec},
972 n: sizeof(struct timeval32));
973}
974
975static inline void
976jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
977{
978 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
979 value->tv_sec = jiffies / HZ;
980}
981
982SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
983 struct timezone __user *, tz)
984{
985 if (tv) {
986 struct timespec64 kts;
987
988 ktime_get_real_ts64(tv: &kts);
989 if (put_tv32(o: tv, i: &kts))
990 return -EFAULT;
991 }
992 if (tz) {
993 if (copy_to_user(to: tz, from: &sys_tz, n: sizeof(sys_tz)))
994 return -EFAULT;
995 }
996 return 0;
997}
998
999SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
1000 struct timezone __user *, tz)
1001{
1002 struct timespec64 kts;
1003 struct timezone ktz;
1004
1005 if (tv) {
1006 if (get_tv32(o: &kts, i: tv))
1007 return -EFAULT;
1008 }
1009 if (tz) {
1010 if (copy_from_user(to: &ktz, from: tz, n: sizeof(*tz)))
1011 return -EFAULT;
1012 }
1013
1014 return do_sys_settimeofday64(tv: tv ? &kts : NULL, tz: tz ? &ktz : NULL);
1015}
1016
1017SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1018 struct timeval32 __user *, tvs)
1019{
1020 struct timespec64 tv[2];
1021
1022 if (tvs) {
1023 if (get_tv32(o: &tv[0], i: &tvs[0]) ||
1024 get_tv32(o: &tv[1], i: &tvs[1]))
1025 return -EFAULT;
1026
1027 if (tv[0].tv_nsec < 0 || tv[0].tv_nsec >= 1000000000 ||
1028 tv[1].tv_nsec < 0 || tv[1].tv_nsec >= 1000000000)
1029 return -EINVAL;
1030 }
1031
1032 return do_utimes(AT_FDCWD, filename, times: tvs ? tv : NULL, flags: 0);
1033}
1034
1035SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1036 fd_set __user *, exp, struct timeval32 __user *, tvp)
1037{
1038 struct timespec64 end_time, *to = NULL;
1039 if (tvp) {
1040 struct timespec64 tv;
1041 to = &end_time;
1042
1043 if (get_tv32(o: &tv, i: tvp))
1044 return -EFAULT;
1045
1046 if (tv.tv_sec < 0 || tv.tv_nsec < 0)
1047 return -EINVAL;
1048
1049 if (poll_select_set_timeout(to, sec: tv.tv_sec, nsec: tv.tv_nsec))
1050 return -EINVAL;
1051
1052 }
1053
1054 /* OSF does not copy back the remaining time. */
1055 return core_sys_select(n, inp, outp, exp, end_time: to);
1056}
1057
1058struct rusage32 {
1059 struct timeval32 ru_utime; /* user time used */
1060 struct timeval32 ru_stime; /* system time used */
1061 long ru_maxrss; /* maximum resident set size */
1062 long ru_ixrss; /* integral shared memory size */
1063 long ru_idrss; /* integral unshared data size */
1064 long ru_isrss; /* integral unshared stack size */
1065 long ru_minflt; /* page reclaims */
1066 long ru_majflt; /* page faults */
1067 long ru_nswap; /* swaps */
1068 long ru_inblock; /* block input operations */
1069 long ru_oublock; /* block output operations */
1070 long ru_msgsnd; /* messages sent */
1071 long ru_msgrcv; /* messages received */
1072 long ru_nsignals; /* signals received */
1073 long ru_nvcsw; /* voluntary context switches */
1074 long ru_nivcsw; /* involuntary " */
1075};
1076
1077SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1078{
1079 struct rusage32 r;
1080 u64 utime, stime;
1081 unsigned long utime_jiffies, stime_jiffies;
1082
1083 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1084 return -EINVAL;
1085
1086 memset(&r, 0, sizeof(r));
1087 switch (who) {
1088 case RUSAGE_SELF:
1089 task_cputime(current, utime: &utime, stime: &stime);
1090 utime_jiffies = nsecs_to_jiffies(n: utime);
1091 stime_jiffies = nsecs_to_jiffies(n: stime);
1092 jiffies_to_timeval32(jiffies: utime_jiffies, value: &r.ru_utime);
1093 jiffies_to_timeval32(jiffies: stime_jiffies, value: &r.ru_stime);
1094 r.ru_minflt = current->min_flt;
1095 r.ru_majflt = current->maj_flt;
1096 break;
1097 case RUSAGE_CHILDREN:
1098 utime_jiffies = nsecs_to_jiffies(current->signal->cutime);
1099 stime_jiffies = nsecs_to_jiffies(current->signal->cstime);
1100 jiffies_to_timeval32(jiffies: utime_jiffies, value: &r.ru_utime);
1101 jiffies_to_timeval32(jiffies: stime_jiffies, value: &r.ru_stime);
1102 r.ru_minflt = current->signal->cmin_flt;
1103 r.ru_majflt = current->signal->cmaj_flt;
1104 break;
1105 }
1106
1107 return copy_to_user(to: ru, from: &r, n: sizeof(r)) ? -EFAULT : 0;
1108}
1109
1110SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1111 struct rusage32 __user *, ur)
1112{
1113 struct rusage r;
1114 long err = kernel_wait4(pid, ustatus, options, &r);
1115 if (err <= 0)
1116 return err;
1117 if (!ur)
1118 return err;
1119 if (put_tv_to_tv32(o: &ur->ru_utime, i: &r.ru_utime))
1120 return -EFAULT;
1121 if (put_tv_to_tv32(o: &ur->ru_stime, i: &r.ru_stime))
1122 return -EFAULT;
1123 if (copy_to_user(to: &ur->ru_maxrss, from: &r.ru_maxrss,
1124 n: sizeof(struct rusage32) - offsetof(struct rusage32, ru_maxrss)))
1125 return -EFAULT;
1126 return err;
1127}
1128
1129/*
1130 * I don't know what the parameters are: the first one
1131 * seems to be a timeval pointer, and I suspect the second
1132 * one is the time remaining.. Ho humm.. No documentation.
1133 */
1134SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1135 struct timeval32 __user *, remain)
1136{
1137 struct timespec64 tmp;
1138 unsigned long ticks;
1139
1140 if (get_tv32(o: &tmp, i: sleep))
1141 goto fault;
1142
1143 ticks = timespec64_to_jiffies(value: &tmp);
1144
1145 ticks = schedule_timeout_interruptible(timeout: ticks);
1146
1147 if (remain) {
1148 jiffies_to_timespec64(jiffies: ticks, value: &tmp);
1149 if (put_tv32(o: remain, i: &tmp))
1150 goto fault;
1151 }
1152
1153 return 0;
1154 fault:
1155 return -EFAULT;
1156}
1157
1158
1159struct timex32 {
1160 unsigned int modes; /* mode selector */
1161 long offset; /* time offset (usec) */
1162 long freq; /* frequency offset (scaled ppm) */
1163 long maxerror; /* maximum error (usec) */
1164 long esterror; /* estimated error (usec) */
1165 int status; /* clock command/status */
1166 long constant; /* pll time constant */
1167 long precision; /* clock precision (usec) (read only) */
1168 long tolerance; /* clock frequency tolerance (ppm)
1169 * (read only)
1170 */
1171 struct timeval32 time; /* (read only) */
1172 long tick; /* (modified) usecs between clock ticks */
1173
1174 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1175 long jitter; /* pps jitter (us) (ro) */
1176 int shift; /* interval duration (s) (shift) (ro) */
1177 long stabil; /* pps stability (scaled ppm) (ro) */
1178 long jitcnt; /* jitter limit exceeded (ro) */
1179 long calcnt; /* calibration intervals (ro) */
1180 long errcnt; /* calibration errors (ro) */
1181 long stbcnt; /* stability limit exceeded (ro) */
1182
1183 int :32; int :32; int :32; int :32;
1184 int :32; int :32; int :32; int :32;
1185 int :32; int :32; int :32; int :32;
1186};
1187
1188SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1189{
1190 struct __kernel_timex txc;
1191 int ret;
1192
1193 /* copy relevant bits of struct timex. */
1194 if (copy_from_user(to: &txc, from: txc_p, offsetof(struct timex32, time)) ||
1195 copy_from_user(to: &txc.tick, from: &txc_p->tick, n: sizeof(struct timex32) -
1196 offsetof(struct timex32, tick)))
1197 return -EFAULT;
1198
1199 ret = do_adjtimex(&txc);
1200 if (ret < 0)
1201 return ret;
1202
1203 /* copy back to timex32 */
1204 if (copy_to_user(to: txc_p, from: &txc, offsetof(struct timex32, time)) ||
1205 (copy_to_user(to: &txc_p->tick, from: &txc.tick, n: sizeof(struct timex32) -
1206 offsetof(struct timex32, tick))) ||
1207 (put_user(txc.time.tv_sec, &txc_p->time.tv_sec)) ||
1208 (put_user(txc.time.tv_usec, &txc_p->time.tv_usec)))
1209 return -EFAULT;
1210
1211 return ret;
1212}
1213
1214/* Get an address range which is currently unmapped. Similar to the
1215 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1216
1217static unsigned long
1218arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1219 unsigned long limit)
1220{
1221 struct vm_unmapped_area_info info;
1222
1223 info.flags = 0;
1224 info.length = len;
1225 info.low_limit = addr;
1226 info.high_limit = limit;
1227 info.align_mask = 0;
1228 info.align_offset = 0;
1229 return vm_unmapped_area(info: &info);
1230}
1231
1232unsigned long
1233arch_get_unmapped_area(struct file *filp, unsigned long addr,
1234 unsigned long len, unsigned long pgoff,
1235 unsigned long flags)
1236{
1237 unsigned long limit;
1238
1239 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1240 if (current->personality & ADDR_LIMIT_32BIT)
1241 limit = 0x80000000;
1242 else
1243 limit = TASK_SIZE;
1244
1245 if (len > limit)
1246 return -ENOMEM;
1247
1248 if (flags & MAP_FIXED)
1249 return addr;
1250
1251 /* First, see if the given suggestion fits.
1252
1253 The OSF/1 loader (/sbin/loader) relies on us returning an
1254 address larger than the requested if one exists, which is
1255 a terribly broken way to program.
1256
1257 That said, I can see the use in being able to suggest not
1258 merely specific addresses, but regions of memory -- perhaps
1259 this feature should be incorporated into all ports? */
1260
1261 if (addr) {
1262 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1263 if (addr != (unsigned long) -ENOMEM)
1264 return addr;
1265 }
1266
1267 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1268 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1269 len, limit);
1270 if (addr != (unsigned long) -ENOMEM)
1271 return addr;
1272
1273 /* Finally, try allocating in low memory. */
1274 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1275
1276 return addr;
1277}
1278
1279SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1280{
1281 int prio = sys_getpriority(which, who);
1282 if (prio >= 0) {
1283 /* Return value is the unbiased priority, i.e. 20 - prio.
1284 This does result in negative return values, so signal
1285 no error */
1286 force_successful_syscall_return();
1287 prio = 20 - prio;
1288 }
1289 return prio;
1290}
1291
1292SYSCALL_DEFINE0(getxuid)
1293{
1294 current_pt_regs()->r20 = sys_geteuid();
1295 return sys_getuid();
1296}
1297
1298SYSCALL_DEFINE0(getxgid)
1299{
1300 current_pt_regs()->r20 = sys_getegid();
1301 return sys_getgid();
1302}
1303
1304SYSCALL_DEFINE0(getxpid)
1305{
1306 current_pt_regs()->r20 = sys_getppid();
1307 return sys_getpid();
1308}
1309
1310SYSCALL_DEFINE0(alpha_pipe)
1311{
1312 int fd[2];
1313 int res = do_pipe_flags(fd, 0);
1314 if (!res) {
1315 /* The return values are in $0 and $20. */
1316 current_pt_regs()->r20 = fd[1];
1317 res = fd[0];
1318 }
1319 return res;
1320}
1321
1322SYSCALL_DEFINE1(sethae, unsigned long, val)
1323{
1324 current_pt_regs()->hae = val;
1325 return 0;
1326}
1327

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