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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(dirent->d_name, name, 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(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, 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(), 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
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(osf_stat, &tmp_stat, 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(osf_stat, &tmp_stat, 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, 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(name, &stat);
359 if (error)
360 return error;
361
362 return linux_to_osf_stat(&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);
371 if (error)
372 return error;
373
374 return linux_to_osf_stat(&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);
383 if (error)
384 return error;
385
386 return linux_to_osf_stat(&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, 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, 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, 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(&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
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(&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
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(&tmp, args, 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(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_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(&uts_sem);
535 memcpy(tmp + 0 * 32, utsname()->sysname, 32);
536 memcpy(tmp + 1 * 32, utsname()->nodename, 32);
537 memcpy(tmp + 2 * 32, utsname()->release, 32);
538 memcpy(tmp + 3 * 32, utsname()->version, 32);
539 memcpy(tmp + 4 * 32, utsname()->machine, 32);
540 up_read(&uts_sem);
541
542 if (copy_to_user(name, tmp, sizeof(tmp)))
543 return -EFAULT;
544 return 0;
545}
546
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(&uts_sem);
570 kname = utsname()->domainname;
571 len = strnlen(kname, namelen);
572 len = min(len + 1, namelen);
573 memcpy(tmp, kname, len);
574 up_read(&uts_sem);
575
576 if (copy_to_user(name, tmp, len))
577 return -EFAULT;
578 return 0;
579}
580
581/*
582 * The following stuff should move into a header file should it ever
583 * be labeled "officially supported." Right now, there is just enough
584 * support to avoid applications (such as tar) printing error
585 * messages. The attributes are not really implemented.
586 */
587
588/*
589 * Values for Property list entry flag
590 */
591#define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
592 by default */
593#define PLE_FLAG_MASK 0x1 /* Valid flag values */
594#define PLE_FLAG_ALL -1 /* All flag value */
595
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(usp);
690 int error;
691
692 if (uss) {
693 void __user *ss_sp;
694
695 error = -EFAULT;
696 if (get_user(ss_sp, &uss->ss_sp))
697 goto out;
698
699 /* If the current stack was set with sigaltstack, don't
700 swap stacks while we are on it. */
701 error = -EPERM;
702 if (current->sas_ss_sp && on_sig_stack(usp))
703 goto out;
704
705 /* Since we don't know the extent of the stack, and we don't
706 track onstack-ness, but rather calculate it, we must
707 presume a size. Ho hum this interface is lossy. */
708 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
709 current->sas_ss_size = SIGSTKSZ;
710 }
711
712 if (uoss) {
713 error = -EFAULT;
714 if (put_user(oss_sp, &uoss->ss_sp) ||
715 put_user(oss_os, &uoss->ss_onstack))
716 goto out;
717 }
718
719 error = 0;
720 out:
721 return error;
722}
723
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(&uts_sem);
750 res = sysinfo_table[offset];
751 len = strlen(res)+1;
752 if ((unsigned long)len > (unsigned long)count)
753 len = count;
754 memcpy(tmp, res, len);
755 up_read(&uts_sem);
756 if (copy_to_user(buf, tmp, len))
757 return -EFAULT;
758 return 0;
759}
760
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(buffer, hwrpb, 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 = ¤t_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 = ¤t_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, si_code,
880 (void __user *)NULL, /* FIXME */
881 0, current);
882 }
883 return 0;
884 }
885
886 case SSI_IEEE_STATE_AT_SIGNAL:
887 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
888 /*
889 * Not sure anybody will ever use this weird stuff. These
890 * ops can be used (under OSF/1) to set the fpcr that should
891 * be used when a signal handler starts executing.
892 */
893 break;
894
895 case SSI_NVPAIRS: {
896 unsigned __user *p = buffer;
897 unsigned i;
898
899 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
900 unsigned v, w, status;
901
902 if (get_user(v, p) || get_user(w, p + 1))
903 return -EFAULT;
904 switch (v) {
905 case SSIN_UACPROC:
906 w &= UAC_BITMASK;
907 status = current_thread_info()->status;
908 status = (status & ~UAC_BITMASK) | w;
909 current_thread_info()->status = status;
910 break;
911
912 default:
913 return -EOPNOTSUPP;
914 }
915 }
916 return 0;
917 }
918
919 case SSI_LMF:
920 return 0;
921
922 default:
923 break;
924 }
925
926 return -EOPNOTSUPP;
927}
928
929/* Translations due to the fact that OSF's time_t is an int. Which
930 affects all sorts of things, like timeval and itimerval. */
931
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(&tv, i, sizeof(struct timeval32)))
950 return -EFAULT;
951 o->tv_sec = tv.tv_sec;
952 o->tv_nsec = tv.tv_usec * NSEC_PER_USEC;
953 return 0;
954}
955
956static inline long
957put_tv32(struct timeval32 __user *o, struct timespec64 *i)
958{
959 return copy_to_user(o, &(struct timeval32){
960 .tv_sec = i->tv_sec,
961 .tv_usec = i->tv_nsec / NSEC_PER_USEC},
962 sizeof(struct timeval32));
963}
964
965static inline long
966put_tv_to_tv32(struct timeval32 __user *o, struct __kernel_old_timeval *i)
967{
968 return copy_to_user(o, &(struct timeval32){
969 .tv_sec = i->tv_sec,
970 .tv_usec = i->tv_usec},
971 sizeof(struct timeval32));
972}
973
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(&kts);
988 if (put_tv32(tv, &kts))
989 return -EFAULT;
990 }
991 if (tz) {
992 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
993 return -EFAULT;
994 }
995 return 0;
996}
997
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(&kts, tv))
1006 return -EFAULT;
1007 }
1008 if (tz) {
1009 if (copy_from_user(&ktz, tz, sizeof(*tz)))
1010 return -EFAULT;
1011 }
1012
1013 return do_sys_settimeofday64(tv ? &kts : NULL, tz ? &ktz : NULL);
1014}
1015
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(&tv[0], &tvs[0]) ||
1023 get_tv32(&tv[1], &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, tvs ? tv : NULL, 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(&tv, 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, tv.tv_sec, 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, 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, &stime);
1089 utime_jiffies = nsecs_to_jiffies(utime);
1090 stime_jiffies = nsecs_to_jiffies(stime);
1091 jiffies_to_timeval32(utime_jiffies, &r.ru_utime);
1092 jiffies_to_timeval32(stime_jiffies, &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(utime_jiffies, &r.ru_utime);
1100 jiffies_to_timeval32(stime_jiffies, &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(ru, &r, 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(&ur->ru_utime, &r.ru_utime))
1119 return -EFAULT;
1120 if (put_tv_to_tv32(&ur->ru_stime, &r.ru_stime))
1121 return -EFAULT;
1122 if (copy_to_user(&ur->ru_maxrss, &r.ru_maxrss,
1123 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(&tmp, sleep))
1140 goto fault;
1141
1142 ticks = timespec64_to_jiffies(&tmp);
1143
1144 ticks = schedule_timeout_interruptible(ticks);
1145
1146 if (remain) {
1147 jiffies_to_timespec64(ticks, &tmp);
1148 if (put_tv32(remain, &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(&txc, txc_p, offsetof(struct timex32, time)) ||
1194 copy_from_user(&txc.tick, &txc_p->tick, 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(txc_p, &txc, offsetof(struct timex32, time)) ||
1204 (copy_to_user(&txc_p->tick, &txc.tick, 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. Similar to the
1214 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1215
1216static unsigned long
1217arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1218 unsigned long limit)
1219{
1220 struct vm_unmapped_area_info info = {};
1221
1222 info.length = len;
1223 info.low_limit = addr;
1224 info.high_limit = limit;
1225 return vm_unmapped_area(&info);
1226}
1227
1228unsigned long
1229arch_get_unmapped_area(struct file *filp, unsigned long addr,
1230 unsigned long len, unsigned long pgoff,
1231 unsigned long flags, vm_flags_t vm_flags)
1232{
1233 unsigned long limit;
1234
1235 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1236 if (current->personality & ADDR_LIMIT_32BIT)
1237 limit = 0x80000000;
1238 else
1239 limit = TASK_SIZE;
1240
1241 if (len > limit)
1242 return -ENOMEM;
1243
1244 if (flags & MAP_FIXED)
1245 return addr;
1246
1247 /* First, see if the given suggestion fits.
1248
1249 The OSF/1 loader (/sbin/loader) relies on us returning an
1250 address larger than the requested if one exists, which is
1251 a terribly broken way to program.
1252
1253 That said, I can see the use in being able to suggest not
1254 merely specific addresses, but regions of memory -- perhaps
1255 this feature should be incorporated into all ports? */
1256
1257 if (addr) {
1258 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1259 if (addr != (unsigned long) -ENOMEM)
1260 return addr;
1261 }
1262
1263 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1264 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1265 len, limit);
1266 if (addr != (unsigned long) -ENOMEM)
1267 return addr;
1268
1269 /* Finally, try allocating in low memory. */
1270 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1271
1272 return addr;
1273}
1274
1275SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1276{
1277 int prio = sys_getpriority(which, who);
1278 if (prio >= 0) {
1279 /* Return value is the unbiased priority, i.e. 20 - prio.
1280 This does result in negative return values, so signal
1281 no error */
1282 force_successful_syscall_return();
1283 prio = 20 - prio;
1284 }
1285 return prio;
1286}
1287
1288SYSCALL_DEFINE0(getxuid)
1289{
1290 current_pt_regs()->r20 = sys_geteuid();
1291 return sys_getuid();
1292}
1293
1294SYSCALL_DEFINE0(getxgid)
1295{
1296 current_pt_regs()->r20 = sys_getegid();
1297 return sys_getgid();
1298}
1299
1300SYSCALL_DEFINE0(getxpid)
1301{
1302 current_pt_regs()->r20 = sys_getppid();
1303 return sys_getpid();
1304}
1305
1306SYSCALL_DEFINE0(alpha_pipe)
1307{
1308 int fd[2];
1309 int res = do_pipe_flags(fd, 0);
1310 if (!res) {
1311 /* The return values are in $0 and $20. */
1312 current_pt_regs()->r20 = fd[1];
1313 res = fd[0];
1314 }
1315 return res;
1316}
1317
1318SYSCALL_DEFINE1(sethae, unsigned long, val)
1319{
1320 current_pt_regs()->hae = val;
1321 return 0;
1322}
1/*
2 * linux/arch/alpha/kernel/osf_sys.c
3 *
4 * Copyright (C) 1995 Linus Torvalds
5 */
6
7/*
8 * This file handles some of the stranger OSF/1 system call interfaces.
9 * Some of the system calls expect a non-C calling standard, others have
10 * special parameter blocks..
11 */
12
13#include <linux/errno.h>
14#include <linux/sched.h>
15#include <linux/kernel.h>
16#include <linux/mm.h>
17#include <linux/smp.h>
18#include <linux/stddef.h>
19#include <linux/syscalls.h>
20#include <linux/unistd.h>
21#include <linux/ptrace.h>
22#include <linux/user.h>
23#include <linux/utsname.h>
24#include <linux/time.h>
25#include <linux/timex.h>
26#include <linux/major.h>
27#include <linux/stat.h>
28#include <linux/mman.h>
29#include <linux/shm.h>
30#include <linux/poll.h>
31#include <linux/file.h>
32#include <linux/types.h>
33#include <linux/ipc.h>
34#include <linux/namei.h>
35#include <linux/uio.h>
36#include <linux/vfs.h>
37#include <linux/rcupdate.h>
38#include <linux/slab.h>
39
40#include <asm/fpu.h>
41#include <asm/io.h>
42#include <asm/uaccess.h>
43#include <asm/sysinfo.h>
44#include <asm/thread_info.h>
45#include <asm/hwrpb.h>
46#include <asm/processor.h>
47
48/*
49 * Brk needs to return an error. Still support Linux's brk(0) query idiom,
50 * which OSF programs just shouldn't be doing. We're still not quite
51 * identical to OSF as we don't return 0 on success, but doing otherwise
52 * would require changes to libc. Hopefully this is good enough.
53 */
54SYSCALL_DEFINE1(osf_brk, unsigned long, brk)
55{
56 unsigned long retval = sys_brk(brk);
57 if (brk && brk != retval)
58 retval = -ENOMEM;
59 return retval;
60}
61
62/*
63 * This is pure guess-work..
64 */
65SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start,
66 unsigned long, text_len, unsigned long, bss_start,
67 unsigned long, bss_len)
68{
69 struct mm_struct *mm;
70
71 mm = current->mm;
72 mm->end_code = bss_start + bss_len;
73 mm->start_brk = bss_start + bss_len;
74 mm->brk = bss_start + bss_len;
75#if 0
76 printk("set_program_attributes(%lx %lx %lx %lx)\n",
77 text_start, text_len, bss_start, bss_len);
78#endif
79 return 0;
80}
81
82/*
83 * OSF/1 directory handling functions...
84 *
85 * The "getdents()" interface is much more sane: the "basep" stuff is
86 * braindamage (it can't really handle filesystems where the directory
87 * offset differences aren't the same as "d_reclen").
88 */
89#define NAME_OFFSET offsetof (struct osf_dirent, d_name)
90
91struct osf_dirent {
92 unsigned int d_ino;
93 unsigned short d_reclen;
94 unsigned short d_namlen;
95 char d_name[1];
96};
97
98struct osf_dirent_callback {
99 struct dir_context ctx;
100 struct osf_dirent __user *dirent;
101 long __user *basep;
102 unsigned int count;
103 int error;
104};
105
106static int
107osf_filldir(void *__buf, const char *name, int namlen, loff_t offset,
108 u64 ino, unsigned int d_type)
109{
110 struct osf_dirent __user *dirent;
111 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf;
112 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
113 unsigned int d_ino;
114
115 buf->error = -EINVAL; /* only used if we fail */
116 if (reclen > buf->count)
117 return -EINVAL;
118 d_ino = ino;
119 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
120 buf->error = -EOVERFLOW;
121 return -EOVERFLOW;
122 }
123 if (buf->basep) {
124 if (put_user(offset, buf->basep))
125 goto Efault;
126 buf->basep = NULL;
127 }
128 dirent = buf->dirent;
129 if (put_user(d_ino, &dirent->d_ino) ||
130 put_user(namlen, &dirent->d_namlen) ||
131 put_user(reclen, &dirent->d_reclen) ||
132 copy_to_user(dirent->d_name, name, namlen) ||
133 put_user(0, dirent->d_name + namlen))
134 goto Efault;
135 dirent = (void __user *)dirent + reclen;
136 buf->dirent = dirent;
137 buf->count -= reclen;
138 return 0;
139Efault:
140 buf->error = -EFAULT;
141 return -EFAULT;
142}
143
144SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
145 struct osf_dirent __user *, dirent, unsigned int, count,
146 long __user *, basep)
147{
148 int error;
149 struct fd arg = fdget(fd);
150 struct osf_dirent_callback buf = {
151 .ctx.actor = osf_filldir,
152 .dirent = dirent,
153 .basep = basep,
154 .count = count
155 };
156
157 if (!arg.file)
158 return -EBADF;
159
160 error = iterate_dir(arg.file, &buf.ctx);
161 if (error >= 0)
162 error = buf.error;
163 if (count != buf.count)
164 error = count - buf.count;
165
166 fdput(arg);
167 return error;
168}
169
170#undef NAME_OFFSET
171
172SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
173 unsigned long, prot, unsigned long, flags, unsigned long, fd,
174 unsigned long, off)
175{
176 unsigned long ret = -EINVAL;
177
178#if 0
179 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
180 printk("%s: unimplemented OSF mmap flags %04lx\n",
181 current->comm, flags);
182#endif
183 if ((off + PAGE_ALIGN(len)) < off)
184 goto out;
185 if (off & ~PAGE_MASK)
186 goto out;
187 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
188 out:
189 return ret;
190}
191
192struct osf_stat {
193 int st_dev;
194 int st_pad1;
195 unsigned st_mode;
196 unsigned short st_nlink;
197 short st_nlink_reserved;
198 unsigned st_uid;
199 unsigned st_gid;
200 int st_rdev;
201 int st_ldev;
202 long st_size;
203 int st_pad2;
204 int st_uatime;
205 int st_pad3;
206 int st_umtime;
207 int st_pad4;
208 int st_uctime;
209 int st_pad5;
210 int st_pad6;
211 unsigned st_flags;
212 unsigned st_gen;
213 long st_spare[4];
214 unsigned st_ino;
215 int st_ino_reserved;
216 int st_atime;
217 int st_atime_reserved;
218 int st_mtime;
219 int st_mtime_reserved;
220 int st_ctime;
221 int st_ctime_reserved;
222 long st_blksize;
223 long st_blocks;
224};
225
226/*
227 * The OSF/1 statfs structure is much larger, but this should
228 * match the beginning, at least.
229 */
230struct osf_statfs {
231 short f_type;
232 short f_flags;
233 int f_fsize;
234 int f_bsize;
235 int f_blocks;
236 int f_bfree;
237 int f_bavail;
238 int f_files;
239 int f_ffree;
240 __kernel_fsid_t f_fsid;
241};
242
243struct osf_statfs64 {
244 short f_type;
245 short f_flags;
246 int f_pad1;
247 int f_pad2;
248 int f_pad3;
249 int f_pad4;
250 int f_pad5;
251 int f_pad6;
252 int f_pad7;
253 __kernel_fsid_t f_fsid;
254 u_short f_namemax;
255 short f_reserved1;
256 int f_spare[8];
257 char f_pad8[90];
258 char f_pad9[90];
259 long mount_info[10];
260 u_long f_flags2;
261 long f_spare2[14];
262 long f_fsize;
263 long f_bsize;
264 long f_blocks;
265 long f_bfree;
266 long f_bavail;
267 long f_files;
268 long f_ffree;
269};
270
271static int
272linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat)
273{
274 struct osf_stat tmp = { 0 };
275
276 tmp.st_dev = lstat->dev;
277 tmp.st_mode = lstat->mode;
278 tmp.st_nlink = lstat->nlink;
279 tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid);
280 tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid);
281 tmp.st_rdev = lstat->rdev;
282 tmp.st_ldev = lstat->rdev;
283 tmp.st_size = lstat->size;
284 tmp.st_uatime = lstat->atime.tv_nsec / 1000;
285 tmp.st_umtime = lstat->mtime.tv_nsec / 1000;
286 tmp.st_uctime = lstat->ctime.tv_nsec / 1000;
287 tmp.st_ino = lstat->ino;
288 tmp.st_atime = lstat->atime.tv_sec;
289 tmp.st_mtime = lstat->mtime.tv_sec;
290 tmp.st_ctime = lstat->ctime.tv_sec;
291 tmp.st_blksize = lstat->blksize;
292 tmp.st_blocks = lstat->blocks;
293
294 return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0;
295}
296
297static int
298linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
299 unsigned long bufsiz)
300{
301 struct osf_statfs tmp_stat;
302
303 tmp_stat.f_type = linux_stat->f_type;
304 tmp_stat.f_flags = 0; /* mount flags */
305 tmp_stat.f_fsize = linux_stat->f_frsize;
306 tmp_stat.f_bsize = linux_stat->f_bsize;
307 tmp_stat.f_blocks = linux_stat->f_blocks;
308 tmp_stat.f_bfree = linux_stat->f_bfree;
309 tmp_stat.f_bavail = linux_stat->f_bavail;
310 tmp_stat.f_files = linux_stat->f_files;
311 tmp_stat.f_ffree = linux_stat->f_ffree;
312 tmp_stat.f_fsid = linux_stat->f_fsid;
313 if (bufsiz > sizeof(tmp_stat))
314 bufsiz = sizeof(tmp_stat);
315 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
316}
317
318static int
319linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat,
320 unsigned long bufsiz)
321{
322 struct osf_statfs64 tmp_stat = { 0 };
323
324 tmp_stat.f_type = linux_stat->f_type;
325 tmp_stat.f_fsize = linux_stat->f_frsize;
326 tmp_stat.f_bsize = linux_stat->f_bsize;
327 tmp_stat.f_blocks = linux_stat->f_blocks;
328 tmp_stat.f_bfree = linux_stat->f_bfree;
329 tmp_stat.f_bavail = linux_stat->f_bavail;
330 tmp_stat.f_files = linux_stat->f_files;
331 tmp_stat.f_ffree = linux_stat->f_ffree;
332 tmp_stat.f_fsid = linux_stat->f_fsid;
333 if (bufsiz > sizeof(tmp_stat))
334 bufsiz = sizeof(tmp_stat);
335 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
336}
337
338SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
339 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
340{
341 struct kstatfs linux_stat;
342 int error = user_statfs(pathname, &linux_stat);
343 if (!error)
344 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
345 return error;
346}
347
348SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
349{
350 struct kstat stat;
351 int error;
352
353 error = vfs_stat(name, &stat);
354 if (error)
355 return error;
356
357 return linux_to_osf_stat(&stat, buf);
358}
359
360SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf)
361{
362 struct kstat stat;
363 int error;
364
365 error = vfs_lstat(name, &stat);
366 if (error)
367 return error;
368
369 return linux_to_osf_stat(&stat, buf);
370}
371
372SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf)
373{
374 struct kstat stat;
375 int error;
376
377 error = vfs_fstat(fd, &stat);
378 if (error)
379 return error;
380
381 return linux_to_osf_stat(&stat, buf);
382}
383
384SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
385 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
386{
387 struct kstatfs linux_stat;
388 int error = fd_statfs(fd, &linux_stat);
389 if (!error)
390 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
391 return error;
392}
393
394SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname,
395 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
396{
397 struct kstatfs linux_stat;
398 int error = user_statfs(pathname, &linux_stat);
399 if (!error)
400 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
401 return error;
402}
403
404SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd,
405 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
406{
407 struct kstatfs linux_stat;
408 int error = fd_statfs(fd, &linux_stat);
409 if (!error)
410 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
411 return error;
412}
413
414/*
415 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
416 *
417 * Although to be frank, neither are the native Linux/i386 ones..
418 */
419struct ufs_args {
420 char __user *devname;
421 int flags;
422 uid_t exroot;
423};
424
425struct cdfs_args {
426 char __user *devname;
427 int flags;
428 uid_t exroot;
429
430 /* This has lots more here, which Linux handles with the option block
431 but I'm too lazy to do the translation into ASCII. */
432};
433
434struct procfs_args {
435 char __user *devname;
436 int flags;
437 uid_t exroot;
438};
439
440/*
441 * We can't actually handle ufs yet, so we translate UFS mounts to
442 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
443 * layout is so braindead it's a major headache doing it.
444 *
445 * Just how long ago was it written? OTOH our UFS driver may be still
446 * unhappy with OSF UFS. [CHECKME]
447 */
448static int
449osf_ufs_mount(const char *dirname, struct ufs_args __user *args, int flags)
450{
451 int retval;
452 struct cdfs_args tmp;
453 struct filename *devname;
454
455 retval = -EFAULT;
456 if (copy_from_user(&tmp, args, sizeof(tmp)))
457 goto out;
458 devname = getname(tmp.devname);
459 retval = PTR_ERR(devname);
460 if (IS_ERR(devname))
461 goto out;
462 retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
463 putname(devname);
464 out:
465 return retval;
466}
467
468static int
469osf_cdfs_mount(const char *dirname, struct cdfs_args __user *args, int flags)
470{
471 int retval;
472 struct cdfs_args tmp;
473 struct filename *devname;
474
475 retval = -EFAULT;
476 if (copy_from_user(&tmp, args, sizeof(tmp)))
477 goto out;
478 devname = getname(tmp.devname);
479 retval = PTR_ERR(devname);
480 if (IS_ERR(devname))
481 goto out;
482 retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
483 putname(devname);
484 out:
485 return retval;
486}
487
488static int
489osf_procfs_mount(const char *dirname, struct procfs_args __user *args, int flags)
490{
491 struct procfs_args tmp;
492
493 if (copy_from_user(&tmp, args, sizeof(tmp)))
494 return -EFAULT;
495
496 return do_mount("", dirname, "proc", flags, NULL);
497}
498
499SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
500 int, flag, void __user *, data)
501{
502 int retval;
503 struct filename *name;
504
505 name = getname(path);
506 retval = PTR_ERR(name);
507 if (IS_ERR(name))
508 goto out;
509 switch (typenr) {
510 case 1:
511 retval = osf_ufs_mount(name->name, data, flag);
512 break;
513 case 6:
514 retval = osf_cdfs_mount(name->name, data, flag);
515 break;
516 case 9:
517 retval = osf_procfs_mount(name->name, data, flag);
518 break;
519 default:
520 retval = -EINVAL;
521 printk("osf_mount(%ld, %x)\n", typenr, flag);
522 }
523 putname(name);
524 out:
525 return retval;
526}
527
528SYSCALL_DEFINE1(osf_utsname, char __user *, name)
529{
530 int error;
531
532 down_read(&uts_sem);
533 error = -EFAULT;
534 if (copy_to_user(name + 0, utsname()->sysname, 32))
535 goto out;
536 if (copy_to_user(name + 32, utsname()->nodename, 32))
537 goto out;
538 if (copy_to_user(name + 64, utsname()->release, 32))
539 goto out;
540 if (copy_to_user(name + 96, utsname()->version, 32))
541 goto out;
542 if (copy_to_user(name + 128, utsname()->machine, 32))
543 goto out;
544
545 error = 0;
546 out:
547 up_read(&uts_sem);
548 return error;
549}
550
551SYSCALL_DEFINE0(getpagesize)
552{
553 return PAGE_SIZE;
554}
555
556SYSCALL_DEFINE0(getdtablesize)
557{
558 return sysctl_nr_open;
559}
560
561/*
562 * For compatibility with OSF/1 only. Use utsname(2) instead.
563 */
564SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
565{
566 unsigned len;
567 int i;
568
569 if (!access_ok(VERIFY_WRITE, name, namelen))
570 return -EFAULT;
571
572 len = namelen;
573 if (len > 32)
574 len = 32;
575
576 down_read(&uts_sem);
577 for (i = 0; i < len; ++i) {
578 __put_user(utsname()->domainname[i], name + i);
579 if (utsname()->domainname[i] == '\0')
580 break;
581 }
582 up_read(&uts_sem);
583
584 return 0;
585}
586
587/*
588 * The following stuff should move into a header file should it ever
589 * be labeled "officially supported." Right now, there is just enough
590 * support to avoid applications (such as tar) printing error
591 * messages. The attributes are not really implemented.
592 */
593
594/*
595 * Values for Property list entry flag
596 */
597#define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
598 by default */
599#define PLE_FLAG_MASK 0x1 /* Valid flag values */
600#define PLE_FLAG_ALL -1 /* All flag value */
601
602struct proplistname_args {
603 unsigned int pl_mask;
604 unsigned int pl_numnames;
605 char **pl_names;
606};
607
608union pl_args {
609 struct setargs {
610 char __user *path;
611 long follow;
612 long nbytes;
613 char __user *buf;
614 } set;
615 struct fsetargs {
616 long fd;
617 long nbytes;
618 char __user *buf;
619 } fset;
620 struct getargs {
621 char __user *path;
622 long follow;
623 struct proplistname_args __user *name_args;
624 long nbytes;
625 char __user *buf;
626 int __user *min_buf_size;
627 } get;
628 struct fgetargs {
629 long fd;
630 struct proplistname_args __user *name_args;
631 long nbytes;
632 char __user *buf;
633 int __user *min_buf_size;
634 } fget;
635 struct delargs {
636 char __user *path;
637 long follow;
638 struct proplistname_args __user *name_args;
639 } del;
640 struct fdelargs {
641 long fd;
642 struct proplistname_args __user *name_args;
643 } fdel;
644};
645
646enum pl_code {
647 PL_SET = 1, PL_FSET = 2,
648 PL_GET = 3, PL_FGET = 4,
649 PL_DEL = 5, PL_FDEL = 6
650};
651
652SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
653 union pl_args __user *, args)
654{
655 long error;
656 int __user *min_buf_size_ptr;
657
658 switch (code) {
659 case PL_SET:
660 if (get_user(error, &args->set.nbytes))
661 error = -EFAULT;
662 break;
663 case PL_FSET:
664 if (get_user(error, &args->fset.nbytes))
665 error = -EFAULT;
666 break;
667 case PL_GET:
668 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
669 if (error)
670 break;
671 error = put_user(0, min_buf_size_ptr);
672 break;
673 case PL_FGET:
674 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
675 if (error)
676 break;
677 error = put_user(0, min_buf_size_ptr);
678 break;
679 case PL_DEL:
680 case PL_FDEL:
681 error = 0;
682 break;
683 default:
684 error = -EOPNOTSUPP;
685 break;
686 };
687 return error;
688}
689
690SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
691 struct sigstack __user *, uoss)
692{
693 unsigned long usp = rdusp();
694 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
695 unsigned long oss_os = on_sig_stack(usp);
696 int error;
697
698 if (uss) {
699 void __user *ss_sp;
700
701 error = -EFAULT;
702 if (get_user(ss_sp, &uss->ss_sp))
703 goto out;
704
705 /* If the current stack was set with sigaltstack, don't
706 swap stacks while we are on it. */
707 error = -EPERM;
708 if (current->sas_ss_sp && on_sig_stack(usp))
709 goto out;
710
711 /* Since we don't know the extent of the stack, and we don't
712 track onstack-ness, but rather calculate it, we must
713 presume a size. Ho hum this interface is lossy. */
714 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
715 current->sas_ss_size = SIGSTKSZ;
716 }
717
718 if (uoss) {
719 error = -EFAULT;
720 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
721 || __put_user(oss_sp, &uoss->ss_sp)
722 || __put_user(oss_os, &uoss->ss_onstack))
723 goto out;
724 }
725
726 error = 0;
727 out:
728 return error;
729}
730
731SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
732{
733 const char *sysinfo_table[] = {
734 utsname()->sysname,
735 utsname()->nodename,
736 utsname()->release,
737 utsname()->version,
738 utsname()->machine,
739 "alpha", /* instruction set architecture */
740 "dummy", /* hardware serial number */
741 "dummy", /* hardware manufacturer */
742 "dummy", /* secure RPC domain */
743 };
744 unsigned long offset;
745 const char *res;
746 long len, err = -EINVAL;
747
748 offset = command-1;
749 if (offset >= ARRAY_SIZE(sysinfo_table)) {
750 /* Digital UNIX has a few unpublished interfaces here */
751 printk("sysinfo(%d)", command);
752 goto out;
753 }
754
755 down_read(&uts_sem);
756 res = sysinfo_table[offset];
757 len = strlen(res)+1;
758 if ((unsigned long)len > (unsigned long)count)
759 len = count;
760 if (copy_to_user(buf, res, len))
761 err = -EFAULT;
762 else
763 err = 0;
764 up_read(&uts_sem);
765 out:
766 return err;
767}
768
769SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
770 unsigned long, nbytes, int __user *, start, void __user *, arg)
771{
772 unsigned long w;
773 struct percpu_struct *cpu;
774
775 switch (op) {
776 case GSI_IEEE_FP_CONTROL:
777 /* Return current software fp control & status bits. */
778 /* Note that DU doesn't verify available space here. */
779
780 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
781 w = swcr_update_status(w, rdfpcr());
782 if (put_user(w, (unsigned long __user *) buffer))
783 return -EFAULT;
784 return 0;
785
786 case GSI_IEEE_STATE_AT_SIGNAL:
787 /*
788 * Not sure anybody will ever use this weird stuff. These
789 * ops can be used (under OSF/1) to set the fpcr that should
790 * be used when a signal handler starts executing.
791 */
792 break;
793
794 case GSI_UACPROC:
795 if (nbytes < sizeof(unsigned int))
796 return -EINVAL;
797 w = current_thread_info()->status & UAC_BITMASK;
798 if (put_user(w, (unsigned int __user *)buffer))
799 return -EFAULT;
800 return 1;
801
802 case GSI_PROC_TYPE:
803 if (nbytes < sizeof(unsigned long))
804 return -EINVAL;
805 cpu = (struct percpu_struct*)
806 ((char*)hwrpb + hwrpb->processor_offset);
807 w = cpu->type;
808 if (put_user(w, (unsigned long __user*)buffer))
809 return -EFAULT;
810 return 1;
811
812 case GSI_GET_HWRPB:
813 if (nbytes > sizeof(*hwrpb))
814 return -EINVAL;
815 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
816 return -EFAULT;
817 return 1;
818
819 default:
820 break;
821 }
822
823 return -EOPNOTSUPP;
824}
825
826SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
827 unsigned long, nbytes, int __user *, start, void __user *, arg)
828{
829 switch (op) {
830 case SSI_IEEE_FP_CONTROL: {
831 unsigned long swcr, fpcr;
832 unsigned int *state;
833
834 /*
835 * Alpha Architecture Handbook 4.7.7.3:
836 * To be fully IEEE compiant, we must track the current IEEE
837 * exception state in software, because spurious bits can be
838 * set in the trap shadow of a software-complete insn.
839 */
840
841 if (get_user(swcr, (unsigned long __user *)buffer))
842 return -EFAULT;
843 state = ¤t_thread_info()->ieee_state;
844
845 /* Update softare trap enable bits. */
846 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
847
848 /* Update the real fpcr. */
849 fpcr = rdfpcr() & FPCR_DYN_MASK;
850 fpcr |= ieee_swcr_to_fpcr(swcr);
851 wrfpcr(fpcr);
852
853 return 0;
854 }
855
856 case SSI_IEEE_RAISE_EXCEPTION: {
857 unsigned long exc, swcr, fpcr, fex;
858 unsigned int *state;
859
860 if (get_user(exc, (unsigned long __user *)buffer))
861 return -EFAULT;
862 state = ¤t_thread_info()->ieee_state;
863 exc &= IEEE_STATUS_MASK;
864
865 /* Update softare trap enable bits. */
866 swcr = (*state & IEEE_SW_MASK) | exc;
867 *state |= exc;
868
869 /* Update the real fpcr. */
870 fpcr = rdfpcr();
871 fpcr |= ieee_swcr_to_fpcr(swcr);
872 wrfpcr(fpcr);
873
874 /* If any exceptions set by this call, and are unmasked,
875 send a signal. Old exceptions are not signaled. */
876 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
877 if (fex) {
878 siginfo_t info;
879 int si_code = 0;
880
881 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
882 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
883 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
884 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
885 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
886 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
887
888 info.si_signo = SIGFPE;
889 info.si_errno = 0;
890 info.si_code = si_code;
891 info.si_addr = NULL; /* FIXME */
892 send_sig_info(SIGFPE, &info, current);
893 }
894 return 0;
895 }
896
897 case SSI_IEEE_STATE_AT_SIGNAL:
898 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
899 /*
900 * Not sure anybody will ever use this weird stuff. These
901 * ops can be used (under OSF/1) to set the fpcr that should
902 * be used when a signal handler starts executing.
903 */
904 break;
905
906 case SSI_NVPAIRS: {
907 unsigned __user *p = buffer;
908 unsigned i;
909
910 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
911 unsigned v, w, status;
912
913 if (get_user(v, p) || get_user(w, p + 1))
914 return -EFAULT;
915 switch (v) {
916 case SSIN_UACPROC:
917 w &= UAC_BITMASK;
918 status = current_thread_info()->status;
919 status = (status & ~UAC_BITMASK) | w;
920 current_thread_info()->status = status;
921 break;
922
923 default:
924 return -EOPNOTSUPP;
925 }
926 }
927 return 0;
928 }
929
930 case SSI_LMF:
931 return 0;
932
933 default:
934 break;
935 }
936
937 return -EOPNOTSUPP;
938}
939
940/* Translations due to the fact that OSF's time_t is an int. Which
941 affects all sorts of things, like timeval and itimerval. */
942
943extern struct timezone sys_tz;
944
945struct timeval32
946{
947 int tv_sec, tv_usec;
948};
949
950struct itimerval32
951{
952 struct timeval32 it_interval;
953 struct timeval32 it_value;
954};
955
956static inline long
957get_tv32(struct timeval *o, struct timeval32 __user *i)
958{
959 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
960 (__get_user(o->tv_sec, &i->tv_sec) |
961 __get_user(o->tv_usec, &i->tv_usec)));
962}
963
964static inline long
965put_tv32(struct timeval32 __user *o, struct timeval *i)
966{
967 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
968 (__put_user(i->tv_sec, &o->tv_sec) |
969 __put_user(i->tv_usec, &o->tv_usec)));
970}
971
972static inline long
973get_it32(struct itimerval *o, struct itimerval32 __user *i)
974{
975 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
976 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
977 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
978 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
979 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
980}
981
982static inline long
983put_it32(struct itimerval32 __user *o, struct itimerval *i)
984{
985 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
986 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
987 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
988 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
989 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
990}
991
992static inline void
993jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
994{
995 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
996 value->tv_sec = jiffies / HZ;
997}
998
999SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
1000 struct timezone __user *, tz)
1001{
1002 if (tv) {
1003 struct timeval ktv;
1004 do_gettimeofday(&ktv);
1005 if (put_tv32(tv, &ktv))
1006 return -EFAULT;
1007 }
1008 if (tz) {
1009 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
1010 return -EFAULT;
1011 }
1012 return 0;
1013}
1014
1015SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
1016 struct timezone __user *, tz)
1017{
1018 struct timespec kts;
1019 struct timezone ktz;
1020
1021 if (tv) {
1022 if (get_tv32((struct timeval *)&kts, tv))
1023 return -EFAULT;
1024 }
1025 if (tz) {
1026 if (copy_from_user(&ktz, tz, sizeof(*tz)))
1027 return -EFAULT;
1028 }
1029
1030 kts.tv_nsec *= 1000;
1031
1032 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
1033}
1034
1035SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
1036{
1037 struct itimerval kit;
1038 int error;
1039
1040 error = do_getitimer(which, &kit);
1041 if (!error && put_it32(it, &kit))
1042 error = -EFAULT;
1043
1044 return error;
1045}
1046
1047SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
1048 struct itimerval32 __user *, out)
1049{
1050 struct itimerval kin, kout;
1051 int error;
1052
1053 if (in) {
1054 if (get_it32(&kin, in))
1055 return -EFAULT;
1056 } else
1057 memset(&kin, 0, sizeof(kin));
1058
1059 error = do_setitimer(which, &kin, out ? &kout : NULL);
1060 if (error || !out)
1061 return error;
1062
1063 if (put_it32(out, &kout))
1064 return -EFAULT;
1065
1066 return 0;
1067
1068}
1069
1070SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1071 struct timeval32 __user *, tvs)
1072{
1073 struct timespec tv[2];
1074
1075 if (tvs) {
1076 struct timeval ktvs[2];
1077 if (get_tv32(&ktvs[0], &tvs[0]) ||
1078 get_tv32(&ktvs[1], &tvs[1]))
1079 return -EFAULT;
1080
1081 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
1082 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
1083 return -EINVAL;
1084
1085 tv[0].tv_sec = ktvs[0].tv_sec;
1086 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
1087 tv[1].tv_sec = ktvs[1].tv_sec;
1088 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
1089 }
1090
1091 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1092}
1093
1094SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1095 fd_set __user *, exp, struct timeval32 __user *, tvp)
1096{
1097 struct timespec end_time, *to = NULL;
1098 if (tvp) {
1099 time_t sec, usec;
1100
1101 to = &end_time;
1102
1103 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
1104 || __get_user(sec, &tvp->tv_sec)
1105 || __get_user(usec, &tvp->tv_usec)) {
1106 return -EFAULT;
1107 }
1108
1109 if (sec < 0 || usec < 0)
1110 return -EINVAL;
1111
1112 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC))
1113 return -EINVAL;
1114
1115 }
1116
1117 /* OSF does not copy back the remaining time. */
1118 return core_sys_select(n, inp, outp, exp, to);
1119}
1120
1121struct rusage32 {
1122 struct timeval32 ru_utime; /* user time used */
1123 struct timeval32 ru_stime; /* system time used */
1124 long ru_maxrss; /* maximum resident set size */
1125 long ru_ixrss; /* integral shared memory size */
1126 long ru_idrss; /* integral unshared data size */
1127 long ru_isrss; /* integral unshared stack size */
1128 long ru_minflt; /* page reclaims */
1129 long ru_majflt; /* page faults */
1130 long ru_nswap; /* swaps */
1131 long ru_inblock; /* block input operations */
1132 long ru_oublock; /* block output operations */
1133 long ru_msgsnd; /* messages sent */
1134 long ru_msgrcv; /* messages received */
1135 long ru_nsignals; /* signals received */
1136 long ru_nvcsw; /* voluntary context switches */
1137 long ru_nivcsw; /* involuntary " */
1138};
1139
1140SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1141{
1142 struct rusage32 r;
1143 cputime_t utime, stime;
1144
1145 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1146 return -EINVAL;
1147
1148 memset(&r, 0, sizeof(r));
1149 switch (who) {
1150 case RUSAGE_SELF:
1151 task_cputime(current, &utime, &stime);
1152 jiffies_to_timeval32(utime, &r.ru_utime);
1153 jiffies_to_timeval32(stime, &r.ru_stime);
1154 r.ru_minflt = current->min_flt;
1155 r.ru_majflt = current->maj_flt;
1156 break;
1157 case RUSAGE_CHILDREN:
1158 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1159 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1160 r.ru_minflt = current->signal->cmin_flt;
1161 r.ru_majflt = current->signal->cmaj_flt;
1162 break;
1163 }
1164
1165 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1166}
1167
1168SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1169 struct rusage32 __user *, ur)
1170{
1171 struct rusage r;
1172 long ret, err;
1173 unsigned int status = 0;
1174 mm_segment_t old_fs;
1175
1176 if (!ur)
1177 return sys_wait4(pid, ustatus, options, NULL);
1178
1179 old_fs = get_fs();
1180
1181 set_fs (KERNEL_DS);
1182 ret = sys_wait4(pid, (unsigned int __user *) &status, options,
1183 (struct rusage __user *) &r);
1184 set_fs (old_fs);
1185
1186 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1187 return -EFAULT;
1188
1189 err = 0;
1190 err |= put_user(status, ustatus);
1191 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1192 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1193 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1194 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1195 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1196 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1197 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1198 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1199 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1200 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1201 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1202 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1203 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1204 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1205 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1206 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1207 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1208 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1209
1210 return err ? err : ret;
1211}
1212
1213/*
1214 * I don't know what the parameters are: the first one
1215 * seems to be a timeval pointer, and I suspect the second
1216 * one is the time remaining.. Ho humm.. No documentation.
1217 */
1218SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1219 struct timeval32 __user *, remain)
1220{
1221 struct timeval tmp;
1222 unsigned long ticks;
1223
1224 if (get_tv32(&tmp, sleep))
1225 goto fault;
1226
1227 ticks = timeval_to_jiffies(&tmp);
1228
1229 ticks = schedule_timeout_interruptible(ticks);
1230
1231 if (remain) {
1232 jiffies_to_timeval(ticks, &tmp);
1233 if (put_tv32(remain, &tmp))
1234 goto fault;
1235 }
1236
1237 return 0;
1238 fault:
1239 return -EFAULT;
1240}
1241
1242
1243struct timex32 {
1244 unsigned int modes; /* mode selector */
1245 long offset; /* time offset (usec) */
1246 long freq; /* frequency offset (scaled ppm) */
1247 long maxerror; /* maximum error (usec) */
1248 long esterror; /* estimated error (usec) */
1249 int status; /* clock command/status */
1250 long constant; /* pll time constant */
1251 long precision; /* clock precision (usec) (read only) */
1252 long tolerance; /* clock frequency tolerance (ppm)
1253 * (read only)
1254 */
1255 struct timeval32 time; /* (read only) */
1256 long tick; /* (modified) usecs between clock ticks */
1257
1258 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1259 long jitter; /* pps jitter (us) (ro) */
1260 int shift; /* interval duration (s) (shift) (ro) */
1261 long stabil; /* pps stability (scaled ppm) (ro) */
1262 long jitcnt; /* jitter limit exceeded (ro) */
1263 long calcnt; /* calibration intervals (ro) */
1264 long errcnt; /* calibration errors (ro) */
1265 long stbcnt; /* stability limit exceeded (ro) */
1266
1267 int :32; int :32; int :32; int :32;
1268 int :32; int :32; int :32; int :32;
1269 int :32; int :32; int :32; int :32;
1270};
1271
1272SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1273{
1274 struct timex txc;
1275 int ret;
1276
1277 /* copy relevant bits of struct timex. */
1278 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1279 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1280 offsetof(struct timex32, time)))
1281 return -EFAULT;
1282
1283 ret = do_adjtimex(&txc);
1284 if (ret < 0)
1285 return ret;
1286
1287 /* copy back to timex32 */
1288 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1289 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1290 offsetof(struct timex32, tick))) ||
1291 (put_tv32(&txc_p->time, &txc.time)))
1292 return -EFAULT;
1293
1294 return ret;
1295}
1296
1297/* Get an address range which is currently unmapped. Similar to the
1298 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1299
1300static unsigned long
1301arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1302 unsigned long limit)
1303{
1304 struct vm_unmapped_area_info info;
1305
1306 info.flags = 0;
1307 info.length = len;
1308 info.low_limit = addr;
1309 info.high_limit = limit;
1310 info.align_mask = 0;
1311 info.align_offset = 0;
1312 return vm_unmapped_area(&info);
1313}
1314
1315unsigned long
1316arch_get_unmapped_area(struct file *filp, unsigned long addr,
1317 unsigned long len, unsigned long pgoff,
1318 unsigned long flags)
1319{
1320 unsigned long limit;
1321
1322 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1323 if (current->personality & ADDR_LIMIT_32BIT)
1324 limit = 0x80000000;
1325 else
1326 limit = TASK_SIZE;
1327
1328 if (len > limit)
1329 return -ENOMEM;
1330
1331 if (flags & MAP_FIXED)
1332 return addr;
1333
1334 /* First, see if the given suggestion fits.
1335
1336 The OSF/1 loader (/sbin/loader) relies on us returning an
1337 address larger than the requested if one exists, which is
1338 a terribly broken way to program.
1339
1340 That said, I can see the use in being able to suggest not
1341 merely specific addresses, but regions of memory -- perhaps
1342 this feature should be incorporated into all ports? */
1343
1344 if (addr) {
1345 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1346 if (addr != (unsigned long) -ENOMEM)
1347 return addr;
1348 }
1349
1350 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1351 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1352 len, limit);
1353 if (addr != (unsigned long) -ENOMEM)
1354 return addr;
1355
1356 /* Finally, try allocating in low memory. */
1357 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1358
1359 return addr;
1360}
1361
1362#ifdef CONFIG_OSF4_COMPAT
1363
1364/* Clear top 32 bits of iov_len in the user's buffer for
1365 compatibility with old versions of OSF/1 where iov_len
1366 was defined as int. */
1367static int
1368osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1369{
1370 unsigned long i;
1371
1372 for (i = 0 ; i < count ; i++) {
1373 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1374
1375 if (put_user(0, iov_len_high))
1376 return -EFAULT;
1377 }
1378 return 0;
1379}
1380
1381SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1382 const struct iovec __user *, vector, unsigned long, count)
1383{
1384 if (unlikely(personality(current->personality) == PER_OSF4))
1385 if (osf_fix_iov_len(vector, count))
1386 return -EFAULT;
1387 return sys_readv(fd, vector, count);
1388}
1389
1390SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1391 const struct iovec __user *, vector, unsigned long, count)
1392{
1393 if (unlikely(personality(current->personality) == PER_OSF4))
1394 if (osf_fix_iov_len(vector, count))
1395 return -EFAULT;
1396 return sys_writev(fd, vector, count);
1397}
1398
1399#endif
1400
1401SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1402{
1403 int prio = sys_getpriority(which, who);
1404 if (prio >= 0) {
1405 /* Return value is the unbiased priority, i.e. 20 - prio.
1406 This does result in negative return values, so signal
1407 no error */
1408 force_successful_syscall_return();
1409 prio = 20 - prio;
1410 }
1411 return prio;
1412}
1413
1414SYSCALL_DEFINE0(getxuid)
1415{
1416 current_pt_regs()->r20 = sys_geteuid();
1417 return sys_getuid();
1418}
1419
1420SYSCALL_DEFINE0(getxgid)
1421{
1422 current_pt_regs()->r20 = sys_getegid();
1423 return sys_getgid();
1424}
1425
1426SYSCALL_DEFINE0(getxpid)
1427{
1428 current_pt_regs()->r20 = sys_getppid();
1429 return sys_getpid();
1430}
1431
1432SYSCALL_DEFINE0(alpha_pipe)
1433{
1434 int fd[2];
1435 int res = do_pipe_flags(fd, 0);
1436 if (!res) {
1437 /* The return values are in $0 and $20. */
1438 current_pt_regs()->r20 = fd[1];
1439 res = fd[0];
1440 }
1441 return res;
1442}
1443
1444SYSCALL_DEFINE1(sethae, unsigned long, val)
1445{
1446 current_pt_regs()->hae = val;
1447 return 0;
1448}