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alpha/osf_sys: remove unused MAX_SELECT_SECONDS
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / alpha / kernel / osf_sys.c
blobfe698b5045e97d8863e921d4fb0069069cf8be0a
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/system.h>
44 #include <asm/sysinfo.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 */
54 SYSCALL_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 */
65 SYSCALL_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
91 struct osf_dirent {
92 unsigned int d_ino;
93 unsigned short d_reclen;
94 unsigned short d_namlen;
95 char d_name[1];
96 };
97
98 struct osf_dirent_callback {
99 struct osf_dirent __user *dirent;
100 long __user *basep;
101 unsigned int count;
102 int error;
103 };
104
105 static int
106 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset,
107 u64 ino, unsigned int d_type)
108 {
109 struct osf_dirent __user *dirent;
110 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf;
111 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
112 unsigned int d_ino;
113
114 buf->error = -EINVAL; /* only used if we fail */
115 if (reclen > buf->count)
116 return -EINVAL;
117 d_ino = ino;
118 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
119 buf->error = -EOVERFLOW;
120 return -EOVERFLOW;
121 }
122 if (buf->basep) {
123 if (put_user(offset, buf->basep))
124 goto Efault;
125 buf->basep = NULL;
126 }
127 dirent = buf->dirent;
128 if (put_user(d_ino, &dirent->d_ino) ||
129 put_user(namlen, &dirent->d_namlen) ||
130 put_user(reclen, &dirent->d_reclen) ||
131 copy_to_user(dirent->d_name, name, namlen) ||
132 put_user(0, dirent->d_name + namlen))
133 goto Efault;
134 dirent = (void __user *)dirent + reclen;
135 buf->dirent = dirent;
136 buf->count -= reclen;
137 return 0;
138 Efault:
139 buf->error = -EFAULT;
140 return -EFAULT;
141 }
142
143 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
144 struct osf_dirent __user *, dirent, unsigned int, count,
145 long __user *, basep)
146 {
147 int error;
148 struct file *file;
149 struct osf_dirent_callback buf;
150
151 error = -EBADF;
152 file = fget(fd);
153 if (!file)
154 goto out;
155
156 buf.dirent = dirent;
157 buf.basep = basep;
158 buf.count = count;
159 buf.error = 0;
160
161 error = vfs_readdir(file, osf_filldir, &buf);
162 if (error >= 0)
163 error = buf.error;
164 if (count != buf.count)
165 error = count - buf.count;
166
167 fput(file);
168 out:
169 return error;
170 }
171
172 #undef NAME_OFFSET
173
174 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
175 unsigned long, prot, unsigned long, flags, unsigned long, fd,
176 unsigned long, off)
177 {
178 unsigned long ret = -EINVAL;
179
180 #if 0
181 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
182 printk("%s: unimplemented OSF mmap flags %04lx\n",
183 current->comm, flags);
184 #endif
185 if ((off + PAGE_ALIGN(len)) < off)
186 goto out;
187 if (off & ~PAGE_MASK)
188 goto out;
189 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
190 out:
191 return ret;
192 }
193
194
195 /*
196 * The OSF/1 statfs structure is much larger, but this should
197 * match the beginning, at least.
198 */
199 struct osf_statfs {
200 short f_type;
201 short f_flags;
202 int f_fsize;
203 int f_bsize;
204 int f_blocks;
205 int f_bfree;
206 int f_bavail;
207 int f_files;
208 int f_ffree;
209 __kernel_fsid_t f_fsid;
210 };
211
212 static int
213 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
214 unsigned long bufsiz)
215 {
216 struct osf_statfs tmp_stat;
217
218 tmp_stat.f_type = linux_stat->f_type;
219 tmp_stat.f_flags = 0; /* mount flags */
220 tmp_stat.f_fsize = linux_stat->f_frsize;
221 tmp_stat.f_bsize = linux_stat->f_bsize;
222 tmp_stat.f_blocks = linux_stat->f_blocks;
223 tmp_stat.f_bfree = linux_stat->f_bfree;
224 tmp_stat.f_bavail = linux_stat->f_bavail;
225 tmp_stat.f_files = linux_stat->f_files;
226 tmp_stat.f_ffree = linux_stat->f_ffree;
227 tmp_stat.f_fsid = linux_stat->f_fsid;
228 if (bufsiz > sizeof(tmp_stat))
229 bufsiz = sizeof(tmp_stat);
230 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
231 }
232
233 static int
234 do_osf_statfs(struct path *path, struct osf_statfs __user *buffer,
235 unsigned long bufsiz)
236 {
237 struct kstatfs linux_stat;
238 int error = vfs_statfs(path, &linux_stat);
239 if (!error)
240 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
241 return error;
242 }
243
244 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
245 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
246 {
247 struct path path;
248 int retval;
249
250 retval = user_path(pathname, &path);
251 if (!retval) {
252 retval = do_osf_statfs(&path, buffer, bufsiz);
253 path_put(&path);
254 }
255 return retval;
256 }
257
258 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
259 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
260 {
261 struct file *file;
262 int retval;
263
264 retval = -EBADF;
265 file = fget(fd);
266 if (file) {
267 retval = do_osf_statfs(&file->f_path, buffer, bufsiz);
268 fput(file);
269 }
270 return retval;
271 }
272
273 /*
274 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
275 *
276 * Although to be frank, neither are the native Linux/i386 ones..
277 */
278 struct ufs_args {
279 char __user *devname;
280 int flags;
281 uid_t exroot;
282 };
283
284 struct cdfs_args {
285 char __user *devname;
286 int flags;
287 uid_t exroot;
288
289 /* This has lots more here, which Linux handles with the option block
290 but I'm too lazy to do the translation into ASCII. */
291 };
292
293 struct procfs_args {
294 char __user *devname;
295 int flags;
296 uid_t exroot;
297 };
298
299 /*
300 * We can't actually handle ufs yet, so we translate UFS mounts to
301 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
302 * layout is so braindead it's a major headache doing it.
303 *
304 * Just how long ago was it written? OTOH our UFS driver may be still
305 * unhappy with OSF UFS. [CHECKME]
306 */
307 static int
308 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
309 {
310 int retval;
311 struct cdfs_args tmp;
312 char *devname;
313
314 retval = -EFAULT;
315 if (copy_from_user(&tmp, args, sizeof(tmp)))
316 goto out;
317 devname = getname(tmp.devname);
318 retval = PTR_ERR(devname);
319 if (IS_ERR(devname))
320 goto out;
321 retval = do_mount(devname, dirname, "ext2", flags, NULL);
322 putname(devname);
323 out:
324 return retval;
325 }
326
327 static int
328 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
329 {
330 int retval;
331 struct cdfs_args tmp;
332 char *devname;
333
334 retval = -EFAULT;
335 if (copy_from_user(&tmp, args, sizeof(tmp)))
336 goto out;
337 devname = getname(tmp.devname);
338 retval = PTR_ERR(devname);
339 if (IS_ERR(devname))
340 goto out;
341 retval = do_mount(devname, dirname, "iso9660", flags, NULL);
342 putname(devname);
343 out:
344 return retval;
345 }
346
347 static int
348 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags)
349 {
350 struct procfs_args tmp;
351
352 if (copy_from_user(&tmp, args, sizeof(tmp)))
353 return -EFAULT;
354
355 return do_mount("", dirname, "proc", flags, NULL);
356 }
357
358 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
359 int, flag, void __user *, data)
360 {
361 int retval;
362 char *name;
363
364 name = getname(path);
365 retval = PTR_ERR(name);
366 if (IS_ERR(name))
367 goto out;
368 switch (typenr) {
369 case 1:
370 retval = osf_ufs_mount(name, data, flag);
371 break;
372 case 6:
373 retval = osf_cdfs_mount(name, data, flag);
374 break;
375 case 9:
376 retval = osf_procfs_mount(name, data, flag);
377 break;
378 default:
379 retval = -EINVAL;
380 printk("osf_mount(%ld, %x)\n", typenr, flag);
381 }
382 putname(name);
383 out:
384 return retval;
385 }
386
387 SYSCALL_DEFINE1(osf_utsname, char __user *, name)
388 {
389 int error;
390
391 down_read(&uts_sem);
392 error = -EFAULT;
393 if (copy_to_user(name + 0, utsname()->sysname, 32))
394 goto out;
395 if (copy_to_user(name + 32, utsname()->nodename, 32))
396 goto out;
397 if (copy_to_user(name + 64, utsname()->release, 32))
398 goto out;
399 if (copy_to_user(name + 96, utsname()->version, 32))
400 goto out;
401 if (copy_to_user(name + 128, utsname()->machine, 32))
402 goto out;
403
404 error = 0;
405 out:
406 up_read(&uts_sem);
407 return error;
408 }
409
410 SYSCALL_DEFINE0(getpagesize)
411 {
412 return PAGE_SIZE;
413 }
414
415 SYSCALL_DEFINE0(getdtablesize)
416 {
417 return sysctl_nr_open;
418 }
419
420 /*
421 * For compatibility with OSF/1 only. Use utsname(2) instead.
422 */
423 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
424 {
425 unsigned len;
426 int i;
427
428 if (!access_ok(VERIFY_WRITE, name, namelen))
429 return -EFAULT;
430
431 len = namelen;
432 if (namelen > 32)
433 len = 32;
434
435 down_read(&uts_sem);
436 for (i = 0; i < len; ++i) {
437 __put_user(utsname()->domainname[i], name + i);
438 if (utsname()->domainname[i] == '\0')
439 break;
440 }
441 up_read(&uts_sem);
442
443 return 0;
444 }
445
446 /*
447 * The following stuff should move into a header file should it ever
448 * be labeled "officially supported." Right now, there is just enough
449 * support to avoid applications (such as tar) printing error
450 * messages. The attributes are not really implemented.
451 */
452
453 /*
454 * Values for Property list entry flag
455 */
456 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
457 by default */
458 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
459 #define PLE_FLAG_ALL -1 /* All flag value */
460
461 struct proplistname_args {
462 unsigned int pl_mask;
463 unsigned int pl_numnames;
464 char **pl_names;
465 };
466
467 union pl_args {
468 struct setargs {
469 char __user *path;
470 long follow;
471 long nbytes;
472 char __user *buf;
473 } set;
474 struct fsetargs {
475 long fd;
476 long nbytes;
477 char __user *buf;
478 } fset;
479 struct getargs {
480 char __user *path;
481 long follow;
482 struct proplistname_args __user *name_args;
483 long nbytes;
484 char __user *buf;
485 int __user *min_buf_size;
486 } get;
487 struct fgetargs {
488 long fd;
489 struct proplistname_args __user *name_args;
490 long nbytes;
491 char __user *buf;
492 int __user *min_buf_size;
493 } fget;
494 struct delargs {
495 char __user *path;
496 long follow;
497 struct proplistname_args __user *name_args;
498 } del;
499 struct fdelargs {
500 long fd;
501 struct proplistname_args __user *name_args;
502 } fdel;
503 };
504
505 enum pl_code {
506 PL_SET = 1, PL_FSET = 2,
507 PL_GET = 3, PL_FGET = 4,
508 PL_DEL = 5, PL_FDEL = 6
509 };
510
511 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
512 union pl_args __user *, args)
513 {
514 long error;
515 int __user *min_buf_size_ptr;
516
517 switch (code) {
518 case PL_SET:
519 if (get_user(error, &args->set.nbytes))
520 error = -EFAULT;
521 break;
522 case PL_FSET:
523 if (get_user(error, &args->fset.nbytes))
524 error = -EFAULT;
525 break;
526 case PL_GET:
527 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
528 if (error)
529 break;
530 error = put_user(0, min_buf_size_ptr);
531 break;
532 case PL_FGET:
533 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
534 if (error)
535 break;
536 error = put_user(0, min_buf_size_ptr);
537 break;
538 case PL_DEL:
539 case PL_FDEL:
540 error = 0;
541 break;
542 default:
543 error = -EOPNOTSUPP;
544 break;
545 };
546 return error;
547 }
548
549 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
550 struct sigstack __user *, uoss)
551 {
552 unsigned long usp = rdusp();
553 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
554 unsigned long oss_os = on_sig_stack(usp);
555 int error;
556
557 if (uss) {
558 void __user *ss_sp;
559
560 error = -EFAULT;
561 if (get_user(ss_sp, &uss->ss_sp))
562 goto out;
563
564 /* If the current stack was set with sigaltstack, don't
565 swap stacks while we are on it. */
566 error = -EPERM;
567 if (current->sas_ss_sp && on_sig_stack(usp))
568 goto out;
569
570 /* Since we don't know the extent of the stack, and we don't
571 track onstack-ness, but rather calculate it, we must
572 presume a size. Ho hum this interface is lossy. */
573 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
574 current->sas_ss_size = SIGSTKSZ;
575 }
576
577 if (uoss) {
578 error = -EFAULT;
579 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
580 || __put_user(oss_sp, &uoss->ss_sp)
581 || __put_user(oss_os, &uoss->ss_onstack))
582 goto out;
583 }
584
585 error = 0;
586 out:
587 return error;
588 }
589
590 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
591 {
592 const char *sysinfo_table[] = {
593 utsname()->sysname,
594 utsname()->nodename,
595 utsname()->release,
596 utsname()->version,
597 utsname()->machine,
598 "alpha", /* instruction set architecture */
599 "dummy", /* hardware serial number */
600 "dummy", /* hardware manufacturer */
601 "dummy", /* secure RPC domain */
602 };
603 unsigned long offset;
604 const char *res;
605 long len, err = -EINVAL;
606
607 offset = command-1;
608 if (offset >= ARRAY_SIZE(sysinfo_table)) {
609 /* Digital UNIX has a few unpublished interfaces here */
610 printk("sysinfo(%d)", command);
611 goto out;
612 }
613
614 down_read(&uts_sem);
615 res = sysinfo_table[offset];
616 len = strlen(res)+1;
617 if (len > count)
618 len = count;
619 if (copy_to_user(buf, res, len))
620 err = -EFAULT;
621 else
622 err = 0;
623 up_read(&uts_sem);
624 out:
625 return err;
626 }
627
628 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
629 unsigned long, nbytes, int __user *, start, void __user *, arg)
630 {
631 unsigned long w;
632 struct percpu_struct *cpu;
633
634 switch (op) {
635 case GSI_IEEE_FP_CONTROL:
636 /* Return current software fp control & status bits. */
637 /* Note that DU doesn't verify available space here. */
638
639 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
640 w = swcr_update_status(w, rdfpcr());
641 if (put_user(w, (unsigned long __user *) buffer))
642 return -EFAULT;
643 return 0;
644
645 case GSI_IEEE_STATE_AT_SIGNAL:
646 /*
647 * Not sure anybody will ever use this weird stuff. These
648 * ops can be used (under OSF/1) to set the fpcr that should
649 * be used when a signal handler starts executing.
650 */
651 break;
652
653 case GSI_UACPROC:
654 if (nbytes < sizeof(unsigned int))
655 return -EINVAL;
656 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK;
657 if (put_user(w, (unsigned int __user *)buffer))
658 return -EFAULT;
659 return 1;
660
661 case GSI_PROC_TYPE:
662 if (nbytes < sizeof(unsigned long))
663 return -EINVAL;
664 cpu = (struct percpu_struct*)
665 ((char*)hwrpb + hwrpb->processor_offset);
666 w = cpu->type;
667 if (put_user(w, (unsigned long __user*)buffer))
668 return -EFAULT;
669 return 1;
670
671 case GSI_GET_HWRPB:
672 if (nbytes < sizeof(*hwrpb))
673 return -EINVAL;
674 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
675 return -EFAULT;
676 return 1;
677
678 default:
679 break;
680 }
681
682 return -EOPNOTSUPP;
683 }
684
685 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
686 unsigned long, nbytes, int __user *, start, void __user *, arg)
687 {
688 switch (op) {
689 case SSI_IEEE_FP_CONTROL: {
690 unsigned long swcr, fpcr;
691 unsigned int *state;
692
693 /*
694 * Alpha Architecture Handbook 4.7.7.3:
695 * To be fully IEEE compiant, we must track the current IEEE
696 * exception state in software, because spurious bits can be
697 * set in the trap shadow of a software-complete insn.
698 */
699
700 if (get_user(swcr, (unsigned long __user *)buffer))
701 return -EFAULT;
702 state = &current_thread_info()->ieee_state;
703
704 /* Update softare trap enable bits. */
705 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
706
707 /* Update the real fpcr. */
708 fpcr = rdfpcr() & FPCR_DYN_MASK;
709 fpcr |= ieee_swcr_to_fpcr(swcr);
710 wrfpcr(fpcr);
711
712 return 0;
713 }
714
715 case SSI_IEEE_RAISE_EXCEPTION: {
716 unsigned long exc, swcr, fpcr, fex;
717 unsigned int *state;
718
719 if (get_user(exc, (unsigned long __user *)buffer))
720 return -EFAULT;
721 state = &current_thread_info()->ieee_state;
722 exc &= IEEE_STATUS_MASK;
723
724 /* Update softare trap enable bits. */
725 swcr = (*state & IEEE_SW_MASK) | exc;
726 *state |= exc;
727
728 /* Update the real fpcr. */
729 fpcr = rdfpcr();
730 fpcr |= ieee_swcr_to_fpcr(swcr);
731 wrfpcr(fpcr);
732
733 /* If any exceptions set by this call, and are unmasked,
734 send a signal. Old exceptions are not signaled. */
735 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
736 if (fex) {
737 siginfo_t info;
738 int si_code = 0;
739
740 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
741 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
742 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
743 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
744 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
745 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
746
747 info.si_signo = SIGFPE;
748 info.si_errno = 0;
749 info.si_code = si_code;
750 info.si_addr = NULL; /* FIXME */
751 send_sig_info(SIGFPE, &info, current);
752 }
753 return 0;
754 }
755
756 case SSI_IEEE_STATE_AT_SIGNAL:
757 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
758 /*
759 * Not sure anybody will ever use this weird stuff. These
760 * ops can be used (under OSF/1) to set the fpcr that should
761 * be used when a signal handler starts executing.
762 */
763 break;
764
765 case SSI_NVPAIRS: {
766 unsigned long v, w, i;
767 unsigned int old, new;
768
769 for (i = 0; i < nbytes; ++i) {
770
771 if (get_user(v, 2*i + (unsigned int __user *)buffer))
772 return -EFAULT;
773 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
774 return -EFAULT;
775 switch (v) {
776 case SSIN_UACPROC:
777 again:
778 old = current_thread_info()->flags;
779 new = old & ~(UAC_BITMASK << UAC_SHIFT);
780 new = new | (w & UAC_BITMASK) << UAC_SHIFT;
781 if (cmpxchg(&current_thread_info()->flags,
782 old, new) != old)
783 goto again;
784 break;
785
786 default:
787 return -EOPNOTSUPP;
788 }
789 }
790 return 0;
791 }
792
793 default:
794 break;
795 }
796
797 return -EOPNOTSUPP;
798 }
799
800 /* Translations due to the fact that OSF's time_t is an int. Which
801 affects all sorts of things, like timeval and itimerval. */
802
803 extern struct timezone sys_tz;
804
805 struct timeval32
806 {
807 int tv_sec, tv_usec;
808 };
809
810 struct itimerval32
811 {
812 struct timeval32 it_interval;
813 struct timeval32 it_value;
814 };
815
816 static inline long
817 get_tv32(struct timeval *o, struct timeval32 __user *i)
818 {
819 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
820 (__get_user(o->tv_sec, &i->tv_sec) |
821 __get_user(o->tv_usec, &i->tv_usec)));
822 }
823
824 static inline long
825 put_tv32(struct timeval32 __user *o, struct timeval *i)
826 {
827 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
828 (__put_user(i->tv_sec, &o->tv_sec) |
829 __put_user(i->tv_usec, &o->tv_usec)));
830 }
831
832 static inline long
833 get_it32(struct itimerval *o, struct itimerval32 __user *i)
834 {
835 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
836 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
837 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
838 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
839 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
840 }
841
842 static inline long
843 put_it32(struct itimerval32 __user *o, struct itimerval *i)
844 {
845 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
846 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
847 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
848 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
849 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
850 }
851
852 static inline void
853 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
854 {
855 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
856 value->tv_sec = jiffies / HZ;
857 }
858
859 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
860 struct timezone __user *, tz)
861 {
862 if (tv) {
863 struct timeval ktv;
864 do_gettimeofday(&ktv);
865 if (put_tv32(tv, &ktv))
866 return -EFAULT;
867 }
868 if (tz) {
869 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
870 return -EFAULT;
871 }
872 return 0;
873 }
874
875 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
876 struct timezone __user *, tz)
877 {
878 struct timespec kts;
879 struct timezone ktz;
880
881 if (tv) {
882 if (get_tv32((struct timeval *)&kts, tv))
883 return -EFAULT;
884 }
885 if (tz) {
886 if (copy_from_user(&ktz, tz, sizeof(*tz)))
887 return -EFAULT;
888 }
889
890 kts.tv_nsec *= 1000;
891
892 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
893 }
894
895 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
896 {
897 struct itimerval kit;
898 int error;
899
900 error = do_getitimer(which, &kit);
901 if (!error && put_it32(it, &kit))
902 error = -EFAULT;
903
904 return error;
905 }
906
907 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
908 struct itimerval32 __user *, out)
909 {
910 struct itimerval kin, kout;
911 int error;
912
913 if (in) {
914 if (get_it32(&kin, in))
915 return -EFAULT;
916 } else
917 memset(&kin, 0, sizeof(kin));
918
919 error = do_setitimer(which, &kin, out ? &kout : NULL);
920 if (error || !out)
921 return error;
922
923 if (put_it32(out, &kout))
924 return -EFAULT;
925
926 return 0;
927
928 }
929
930 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
931 struct timeval32 __user *, tvs)
932 {
933 struct timespec tv[2];
934
935 if (tvs) {
936 struct timeval ktvs[2];
937 if (get_tv32(&ktvs[0], &tvs[0]) ||
938 get_tv32(&ktvs[1], &tvs[1]))
939 return -EFAULT;
940
941 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
942 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
943 return -EINVAL;
944
945 tv[0].tv_sec = ktvs[0].tv_sec;
946 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
947 tv[1].tv_sec = ktvs[1].tv_sec;
948 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
949 }
950
951 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
952 }
953
954 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
955 fd_set __user *, exp, struct timeval32 __user *, tvp)
956 {
957 struct timespec end_time, *to = NULL;
958 if (tvp) {
959 time_t sec, usec;
960
961 to = &end_time;
962
963 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
964 || __get_user(sec, &tvp->tv_sec)
965 || __get_user(usec, &tvp->tv_usec)) {
966 return -EFAULT;
967 }
968
969 if (sec < 0 || usec < 0)
970 return -EINVAL;
971
972 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC))
973 return -EINVAL;
974
975 }
976
977 /* OSF does not copy back the remaining time. */
978 return core_sys_select(n, inp, outp, exp, to);
979 }
980
981 struct rusage32 {
982 struct timeval32 ru_utime; /* user time used */
983 struct timeval32 ru_stime; /* system time used */
984 long ru_maxrss; /* maximum resident set size */
985 long ru_ixrss; /* integral shared memory size */
986 long ru_idrss; /* integral unshared data size */
987 long ru_isrss; /* integral unshared stack size */
988 long ru_minflt; /* page reclaims */
989 long ru_majflt; /* page faults */
990 long ru_nswap; /* swaps */
991 long ru_inblock; /* block input operations */
992 long ru_oublock; /* block output operations */
993 long ru_msgsnd; /* messages sent */
994 long ru_msgrcv; /* messages received */
995 long ru_nsignals; /* signals received */
996 long ru_nvcsw; /* voluntary context switches */
997 long ru_nivcsw; /* involuntary " */
998 };
999
1000 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1001 {
1002 struct rusage32 r;
1003
1004 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1005 return -EINVAL;
1006
1007 memset(&r, 0, sizeof(r));
1008 switch (who) {
1009 case RUSAGE_SELF:
1010 jiffies_to_timeval32(current->utime, &r.ru_utime);
1011 jiffies_to_timeval32(current->stime, &r.ru_stime);
1012 r.ru_minflt = current->min_flt;
1013 r.ru_majflt = current->maj_flt;
1014 break;
1015 case RUSAGE_CHILDREN:
1016 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1017 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1018 r.ru_minflt = current->signal->cmin_flt;
1019 r.ru_majflt = current->signal->cmaj_flt;
1020 break;
1021 }
1022
1023 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1024 }
1025
1026 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1027 struct rusage32 __user *, ur)
1028 {
1029 struct rusage r;
1030 long ret, err;
1031 mm_segment_t old_fs;
1032
1033 if (!ur)
1034 return sys_wait4(pid, ustatus, options, NULL);
1035
1036 old_fs = get_fs();
1037
1038 set_fs (KERNEL_DS);
1039 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r);
1040 set_fs (old_fs);
1041
1042 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1043 return -EFAULT;
1044
1045 err = 0;
1046 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1047 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1048 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1049 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1050 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1051 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1052 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1053 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1054 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1055 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1056 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1057 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1058 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1059 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1060 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1061 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1062 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1063 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1064
1065 return err ? err : ret;
1066 }
1067
1068 /*
1069 * I don't know what the parameters are: the first one
1070 * seems to be a timeval pointer, and I suspect the second
1071 * one is the time remaining.. Ho humm.. No documentation.
1072 */
1073 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1074 struct timeval32 __user *, remain)
1075 {
1076 struct timeval tmp;
1077 unsigned long ticks;
1078
1079 if (get_tv32(&tmp, sleep))
1080 goto fault;
1081
1082 ticks = timeval_to_jiffies(&tmp);
1083
1084 ticks = schedule_timeout_interruptible(ticks);
1085
1086 if (remain) {
1087 jiffies_to_timeval(ticks, &tmp);
1088 if (put_tv32(remain, &tmp))
1089 goto fault;
1090 }
1091
1092 return 0;
1093 fault:
1094 return -EFAULT;
1095 }
1096
1097
1098 struct timex32 {
1099 unsigned int modes; /* mode selector */
1100 long offset; /* time offset (usec) */
1101 long freq; /* frequency offset (scaled ppm) */
1102 long maxerror; /* maximum error (usec) */
1103 long esterror; /* estimated error (usec) */
1104 int status; /* clock command/status */
1105 long constant; /* pll time constant */
1106 long precision; /* clock precision (usec) (read only) */
1107 long tolerance; /* clock frequency tolerance (ppm)
1108 * (read only)
1109 */
1110 struct timeval32 time; /* (read only) */
1111 long tick; /* (modified) usecs between clock ticks */
1112
1113 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1114 long jitter; /* pps jitter (us) (ro) */
1115 int shift; /* interval duration (s) (shift) (ro) */
1116 long stabil; /* pps stability (scaled ppm) (ro) */
1117 long jitcnt; /* jitter limit exceeded (ro) */
1118 long calcnt; /* calibration intervals (ro) */
1119 long errcnt; /* calibration errors (ro) */
1120 long stbcnt; /* stability limit exceeded (ro) */
1121
1122 int :32; int :32; int :32; int :32;
1123 int :32; int :32; int :32; int :32;
1124 int :32; int :32; int :32; int :32;
1125 };
1126
1127 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1128 {
1129 struct timex txc;
1130 int ret;
1131
1132 /* copy relevant bits of struct timex. */
1133 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1134 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1135 offsetof(struct timex32, time)))
1136 return -EFAULT;
1137
1138 ret = do_adjtimex(&txc);
1139 if (ret < 0)
1140 return ret;
1141
1142 /* copy back to timex32 */
1143 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1144 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1145 offsetof(struct timex32, tick))) ||
1146 (put_tv32(&txc_p->time, &txc.time)))
1147 return -EFAULT;
1148
1149 return ret;
1150 }
1151
1152 /* Get an address range which is currently unmapped. Similar to the
1153 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1154
1155 static unsigned long
1156 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1157 unsigned long limit)
1158 {
1159 struct vm_area_struct *vma = find_vma(current->mm, addr);
1160
1161 while (1) {
1162 /* At this point: (!vma || addr < vma->vm_end). */
1163 if (limit - len < addr)
1164 return -ENOMEM;
1165 if (!vma || addr + len <= vma->vm_start)
1166 return addr;
1167 addr = vma->vm_end;
1168 vma = vma->vm_next;
1169 }
1170 }
1171
1172 unsigned long
1173 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1174 unsigned long len, unsigned long pgoff,
1175 unsigned long flags)
1176 {
1177 unsigned long limit;
1178
1179 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1180 if (current->personality & ADDR_LIMIT_32BIT)
1181 limit = 0x80000000;
1182 else
1183 limit = TASK_SIZE;
1184
1185 if (len > limit)
1186 return -ENOMEM;
1187
1188 if (flags & MAP_FIXED)
1189 return addr;
1190
1191 /* First, see if the given suggestion fits.
1192
1193 The OSF/1 loader (/sbin/loader) relies on us returning an
1194 address larger than the requested if one exists, which is
1195 a terribly broken way to program.
1196
1197 That said, I can see the use in being able to suggest not
1198 merely specific addresses, but regions of memory -- perhaps
1199 this feature should be incorporated into all ports? */
1200
1201 if (addr) {
1202 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1203 if (addr != (unsigned long) -ENOMEM)
1204 return addr;
1205 }
1206
1207 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1208 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1209 len, limit);
1210 if (addr != (unsigned long) -ENOMEM)
1211 return addr;
1212
1213 /* Finally, try allocating in low memory. */
1214 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1215
1216 return addr;
1217 }
1218
1219 #ifdef CONFIG_OSF4_COMPAT
1220
1221 /* Clear top 32 bits of iov_len in the user's buffer for
1222 compatibility with old versions of OSF/1 where iov_len
1223 was defined as int. */
1224 static int
1225 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1226 {
1227 unsigned long i;
1228
1229 for (i = 0 ; i < count ; i++) {
1230 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1231
1232 if (put_user(0, iov_len_high))
1233 return -EFAULT;
1234 }
1235 return 0;
1236 }
1237
1238 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1239 const struct iovec __user *, vector, unsigned long, count)
1240 {
1241 if (unlikely(personality(current->personality) == PER_OSF4))
1242 if (osf_fix_iov_len(vector, count))
1243 return -EFAULT;
1244 return sys_readv(fd, vector, count);
1245 }
1246
1247 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1248 const struct iovec __user *, vector, unsigned long, count)
1249 {
1250 if (unlikely(personality(current->personality) == PER_OSF4))
1251 if (osf_fix_iov_len(vector, count))
1252 return -EFAULT;
1253 return sys_writev(fd, vector, count);
1254 }
1255
1256 #endif
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree