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thinkpad-acpi: fix use of MODULE_AUTHOR
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / alpha / kernel / osf_sys.c
blobae41f097864b8ccc1ee49622dd96e6a88d8d4f39
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/smp_lock.h>
19 #include <linux/stddef.h>
20 #include <linux/syscalls.h>
21 #include <linux/unistd.h>
22 #include <linux/ptrace.h>
23 #include <linux/slab.h>
24 #include <linux/user.h>
25 #include <linux/utsname.h>
26 #include <linux/time.h>
27 #include <linux/timex.h>
28 #include <linux/major.h>
29 #include <linux/stat.h>
30 #include <linux/mman.h>
31 #include <linux/shm.h>
32 #include <linux/poll.h>
33 #include <linux/file.h>
34 #include <linux/types.h>
35 #include <linux/ipc.h>
36 #include <linux/namei.h>
37 #include <linux/uio.h>
38 #include <linux/vfs.h>
39 #include <linux/rcupdate.h>
40
41 #include <asm/fpu.h>
42 #include <asm/io.h>
43 #include <asm/uaccess.h>
44 #include <asm/system.h>
45 #include <asm/sysinfo.h>
46 #include <asm/hwrpb.h>
47 #include <asm/processor.h>
48
49 extern int do_pipe(int *);
50
51 /*
52 * Brk needs to return an error. Still support Linux's brk(0) query idiom,
53 * which OSF programs just shouldn't be doing. We're still not quite
54 * identical to OSF as we don't return 0 on success, but doing otherwise
55 * would require changes to libc. Hopefully this is good enough.
56 */
57 SYSCALL_DEFINE1(osf_brk, unsigned long, brk)
58 {
59 unsigned long retval = sys_brk(brk);
60 if (brk && brk != retval)
61 retval = -ENOMEM;
62 return retval;
63 }
64
65 /*
66 * This is pure guess-work..
67 */
68 SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start,
69 unsigned long, text_len, unsigned long, bss_start,
70 unsigned long, bss_len)
71 {
72 struct mm_struct *mm;
73
74 lock_kernel();
75 mm = current->mm;
76 mm->end_code = bss_start + bss_len;
77 mm->start_brk = bss_start + bss_len;
78 mm->brk = bss_start + bss_len;
79 #if 0
80 printk("set_program_attributes(%lx %lx %lx %lx)\n",
81 text_start, text_len, bss_start, bss_len);
82 #endif
83 unlock_kernel();
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
96 struct osf_dirent {
97 unsigned int d_ino;
98 unsigned short d_reclen;
99 unsigned short d_namlen;
100 char d_name[1];
101 };
102
103 struct osf_dirent_callback {
104 struct osf_dirent __user *dirent;
105 long __user *basep;
106 unsigned int count;
107 int error;
108 };
109
110 static int
111 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset,
112 u64 ino, unsigned int d_type)
113 {
114 struct osf_dirent __user *dirent;
115 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf;
116 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
117 unsigned int d_ino;
118
119 buf->error = -EINVAL; /* only used if we fail */
120 if (reclen > buf->count)
121 return -EINVAL;
122 d_ino = ino;
123 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
124 buf->error = -EOVERFLOW;
125 return -EOVERFLOW;
126 }
127 if (buf->basep) {
128 if (put_user(offset, buf->basep))
129 goto Efault;
130 buf->basep = NULL;
131 }
132 dirent = buf->dirent;
133 if (put_user(d_ino, &dirent->d_ino) ||
134 put_user(namlen, &dirent->d_namlen) ||
135 put_user(reclen, &dirent->d_reclen) ||
136 copy_to_user(dirent->d_name, name, namlen) ||
137 put_user(0, dirent->d_name + namlen))
138 goto Efault;
139 dirent = (void __user *)dirent + reclen;
140 buf->dirent = dirent;
141 buf->count -= reclen;
142 return 0;
143 Efault:
144 buf->error = -EFAULT;
145 return -EFAULT;
146 }
147
148 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
149 struct osf_dirent __user *, dirent, unsigned int, count,
150 long __user *, basep)
151 {
152 int error;
153 struct file *file;
154 struct osf_dirent_callback buf;
155
156 error = -EBADF;
157 file = fget(fd);
158 if (!file)
159 goto out;
160
161 buf.dirent = dirent;
162 buf.basep = basep;
163 buf.count = count;
164 buf.error = 0;
165
166 error = vfs_readdir(file, osf_filldir, &buf);
167 if (error >= 0)
168 error = buf.error;
169 if (count != buf.count)
170 error = count - buf.count;
171
172 fput(file);
173 out:
174 return error;
175 }
176
177 #undef NAME_OFFSET
178
179 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
180 unsigned long, prot, unsigned long, flags, unsigned long, fd,
181 unsigned long, off)
182 {
183 struct file *file = NULL;
184 unsigned long ret = -EBADF;
185
186 #if 0
187 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
188 printk("%s: unimplemented OSF mmap flags %04lx\n",
189 current->comm, flags);
190 #endif
191 if (!(flags & MAP_ANONYMOUS)) {
192 file = fget(fd);
193 if (!file)
194 goto out;
195 }
196 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
197 down_write(&current->mm->mmap_sem);
198 ret = do_mmap(file, addr, len, prot, flags, off);
199 up_write(&current->mm->mmap_sem);
200 if (file)
201 fput(file);
202 out:
203 return ret;
204 }
205
206
207 /*
208 * The OSF/1 statfs structure is much larger, but this should
209 * match the beginning, at least.
210 */
211 struct osf_statfs {
212 short f_type;
213 short f_flags;
214 int f_fsize;
215 int f_bsize;
216 int f_blocks;
217 int f_bfree;
218 int f_bavail;
219 int f_files;
220 int f_ffree;
221 __kernel_fsid_t f_fsid;
222 };
223
224 static int
225 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
226 unsigned long bufsiz)
227 {
228 struct osf_statfs tmp_stat;
229
230 tmp_stat.f_type = linux_stat->f_type;
231 tmp_stat.f_flags = 0; /* mount flags */
232 tmp_stat.f_fsize = linux_stat->f_frsize;
233 tmp_stat.f_bsize = linux_stat->f_bsize;
234 tmp_stat.f_blocks = linux_stat->f_blocks;
235 tmp_stat.f_bfree = linux_stat->f_bfree;
236 tmp_stat.f_bavail = linux_stat->f_bavail;
237 tmp_stat.f_files = linux_stat->f_files;
238 tmp_stat.f_ffree = linux_stat->f_ffree;
239 tmp_stat.f_fsid = linux_stat->f_fsid;
240 if (bufsiz > sizeof(tmp_stat))
241 bufsiz = sizeof(tmp_stat);
242 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
243 }
244
245 static int
246 do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer,
247 unsigned long bufsiz)
248 {
249 struct kstatfs linux_stat;
250 int error = vfs_statfs(dentry, &linux_stat);
251 if (!error)
252 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
253 return error;
254 }
255
256 SYSCALL_DEFINE3(osf_statfs, char __user *, pathname,
257 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
258 {
259 struct path path;
260 int retval;
261
262 retval = user_path(pathname, &path);
263 if (!retval) {
264 retval = do_osf_statfs(path.dentry, buffer, bufsiz);
265 path_put(&path);
266 }
267 return retval;
268 }
269
270 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
271 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
272 {
273 struct file *file;
274 int retval;
275
276 retval = -EBADF;
277 file = fget(fd);
278 if (file) {
279 retval = do_osf_statfs(file->f_path.dentry, buffer, bufsiz);
280 fput(file);
281 }
282 return retval;
283 }
284
285 /*
286 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
287 *
288 * Although to be frank, neither are the native Linux/i386 ones..
289 */
290 struct ufs_args {
291 char __user *devname;
292 int flags;
293 uid_t exroot;
294 };
295
296 struct cdfs_args {
297 char __user *devname;
298 int flags;
299 uid_t exroot;
300
301 /* This has lots more here, which Linux handles with the option block
302 but I'm too lazy to do the translation into ASCII. */
303 };
304
305 struct procfs_args {
306 char __user *devname;
307 int flags;
308 uid_t exroot;
309 };
310
311 /*
312 * We can't actually handle ufs yet, so we translate UFS mounts to
313 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
314 * layout is so braindead it's a major headache doing it.
315 *
316 * Just how long ago was it written? OTOH our UFS driver may be still
317 * unhappy with OSF UFS. [CHECKME]
318 */
319 static int
320 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
321 {
322 int retval;
323 struct cdfs_args tmp;
324 char *devname;
325
326 retval = -EFAULT;
327 if (copy_from_user(&tmp, args, sizeof(tmp)))
328 goto out;
329 devname = getname(tmp.devname);
330 retval = PTR_ERR(devname);
331 if (IS_ERR(devname))
332 goto out;
333 retval = do_mount(devname, dirname, "ext2", flags, NULL);
334 putname(devname);
335 out:
336 return retval;
337 }
338
339 static int
340 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
341 {
342 int retval;
343 struct cdfs_args tmp;
344 char *devname;
345
346 retval = -EFAULT;
347 if (copy_from_user(&tmp, args, sizeof(tmp)))
348 goto out;
349 devname = getname(tmp.devname);
350 retval = PTR_ERR(devname);
351 if (IS_ERR(devname))
352 goto out;
353 retval = do_mount(devname, dirname, "iso9660", flags, NULL);
354 putname(devname);
355 out:
356 return retval;
357 }
358
359 static int
360 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags)
361 {
362 struct procfs_args tmp;
363
364 if (copy_from_user(&tmp, args, sizeof(tmp)))
365 return -EFAULT;
366
367 return do_mount("", dirname, "proc", flags, NULL);
368 }
369
370 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, char __user *, path,
371 int, flag, void __user *, data)
372 {
373 int retval = -EINVAL;
374 char *name;
375
376 lock_kernel();
377
378 name = getname(path);
379 retval = PTR_ERR(name);
380 if (IS_ERR(name))
381 goto out;
382 switch (typenr) {
383 case 1:
384 retval = osf_ufs_mount(name, data, flag);
385 break;
386 case 6:
387 retval = osf_cdfs_mount(name, data, flag);
388 break;
389 case 9:
390 retval = osf_procfs_mount(name, data, flag);
391 break;
392 default:
393 printk("osf_mount(%ld, %x)\n", typenr, flag);
394 }
395 putname(name);
396 out:
397 unlock_kernel();
398 return retval;
399 }
400
401 SYSCALL_DEFINE1(osf_utsname, char __user *, name)
402 {
403 int error;
404
405 down_read(&uts_sem);
406 error = -EFAULT;
407 if (copy_to_user(name + 0, utsname()->sysname, 32))
408 goto out;
409 if (copy_to_user(name + 32, utsname()->nodename, 32))
410 goto out;
411 if (copy_to_user(name + 64, utsname()->release, 32))
412 goto out;
413 if (copy_to_user(name + 96, utsname()->version, 32))
414 goto out;
415 if (copy_to_user(name + 128, utsname()->machine, 32))
416 goto out;
417
418 error = 0;
419 out:
420 up_read(&uts_sem);
421 return error;
422 }
423
424 SYSCALL_DEFINE0(getpagesize)
425 {
426 return PAGE_SIZE;
427 }
428
429 SYSCALL_DEFINE0(getdtablesize)
430 {
431 return sysctl_nr_open;
432 }
433
434 /*
435 * For compatibility with OSF/1 only. Use utsname(2) instead.
436 */
437 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
438 {
439 unsigned len;
440 int i;
441
442 if (!access_ok(VERIFY_WRITE, name, namelen))
443 return -EFAULT;
444
445 len = namelen;
446 if (namelen > 32)
447 len = 32;
448
449 down_read(&uts_sem);
450 for (i = 0; i < len; ++i) {
451 __put_user(utsname()->domainname[i], name + i);
452 if (utsname()->domainname[i] == '\0')
453 break;
454 }
455 up_read(&uts_sem);
456
457 return 0;
458 }
459
460 /*
461 * The following stuff should move into a header file should it ever
462 * be labeled "officially supported." Right now, there is just enough
463 * support to avoid applications (such as tar) printing error
464 * messages. The attributes are not really implemented.
465 */
466
467 /*
468 * Values for Property list entry flag
469 */
470 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
471 by default */
472 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
473 #define PLE_FLAG_ALL -1 /* All flag value */
474
475 struct proplistname_args {
476 unsigned int pl_mask;
477 unsigned int pl_numnames;
478 char **pl_names;
479 };
480
481 union pl_args {
482 struct setargs {
483 char __user *path;
484 long follow;
485 long nbytes;
486 char __user *buf;
487 } set;
488 struct fsetargs {
489 long fd;
490 long nbytes;
491 char __user *buf;
492 } fset;
493 struct getargs {
494 char __user *path;
495 long follow;
496 struct proplistname_args __user *name_args;
497 long nbytes;
498 char __user *buf;
499 int __user *min_buf_size;
500 } get;
501 struct fgetargs {
502 long fd;
503 struct proplistname_args __user *name_args;
504 long nbytes;
505 char __user *buf;
506 int __user *min_buf_size;
507 } fget;
508 struct delargs {
509 char __user *path;
510 long follow;
511 struct proplistname_args __user *name_args;
512 } del;
513 struct fdelargs {
514 long fd;
515 struct proplistname_args __user *name_args;
516 } fdel;
517 };
518
519 enum pl_code {
520 PL_SET = 1, PL_FSET = 2,
521 PL_GET = 3, PL_FGET = 4,
522 PL_DEL = 5, PL_FDEL = 6
523 };
524
525 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
526 union pl_args __user *, args)
527 {
528 long error;
529 int __user *min_buf_size_ptr;
530
531 lock_kernel();
532 switch (code) {
533 case PL_SET:
534 if (get_user(error, &args->set.nbytes))
535 error = -EFAULT;
536 break;
537 case PL_FSET:
538 if (get_user(error, &args->fset.nbytes))
539 error = -EFAULT;
540 break;
541 case PL_GET:
542 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
543 if (error)
544 break;
545 error = put_user(0, min_buf_size_ptr);
546 break;
547 case PL_FGET:
548 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
549 if (error)
550 break;
551 error = put_user(0, min_buf_size_ptr);
552 break;
553 case PL_DEL:
554 case PL_FDEL:
555 error = 0;
556 break;
557 default:
558 error = -EOPNOTSUPP;
559 break;
560 };
561 unlock_kernel();
562 return error;
563 }
564
565 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
566 struct sigstack __user *, uoss)
567 {
568 unsigned long usp = rdusp();
569 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
570 unsigned long oss_os = on_sig_stack(usp);
571 int error;
572
573 if (uss) {
574 void __user *ss_sp;
575
576 error = -EFAULT;
577 if (get_user(ss_sp, &uss->ss_sp))
578 goto out;
579
580 /* If the current stack was set with sigaltstack, don't
581 swap stacks while we are on it. */
582 error = -EPERM;
583 if (current->sas_ss_sp && on_sig_stack(usp))
584 goto out;
585
586 /* Since we don't know the extent of the stack, and we don't
587 track onstack-ness, but rather calculate it, we must
588 presume a size. Ho hum this interface is lossy. */
589 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
590 current->sas_ss_size = SIGSTKSZ;
591 }
592
593 if (uoss) {
594 error = -EFAULT;
595 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
596 || __put_user(oss_sp, &uoss->ss_sp)
597 || __put_user(oss_os, &uoss->ss_onstack))
598 goto out;
599 }
600
601 error = 0;
602 out:
603 return error;
604 }
605
606 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
607 {
608 char *sysinfo_table[] = {
609 utsname()->sysname,
610 utsname()->nodename,
611 utsname()->release,
612 utsname()->version,
613 utsname()->machine,
614 "alpha", /* instruction set architecture */
615 "dummy", /* hardware serial number */
616 "dummy", /* hardware manufacturer */
617 "dummy", /* secure RPC domain */
618 };
619 unsigned long offset;
620 char *res;
621 long len, err = -EINVAL;
622
623 offset = command-1;
624 if (offset >= ARRAY_SIZE(sysinfo_table)) {
625 /* Digital UNIX has a few unpublished interfaces here */
626 printk("sysinfo(%d)", command);
627 goto out;
628 }
629
630 down_read(&uts_sem);
631 res = sysinfo_table[offset];
632 len = strlen(res)+1;
633 if (len > count)
634 len = count;
635 if (copy_to_user(buf, res, len))
636 err = -EFAULT;
637 else
638 err = 0;
639 up_read(&uts_sem);
640 out:
641 return err;
642 }
643
644 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
645 unsigned long, nbytes, int __user *, start, void __user *, arg)
646 {
647 unsigned long w;
648 struct percpu_struct *cpu;
649
650 switch (op) {
651 case GSI_IEEE_FP_CONTROL:
652 /* Return current software fp control & status bits. */
653 /* Note that DU doesn't verify available space here. */
654
655 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
656 w = swcr_update_status(w, rdfpcr());
657 if (put_user(w, (unsigned long __user *) buffer))
658 return -EFAULT;
659 return 0;
660
661 case GSI_IEEE_STATE_AT_SIGNAL:
662 /*
663 * Not sure anybody will ever use this weird stuff. These
664 * ops can be used (under OSF/1) to set the fpcr that should
665 * be used when a signal handler starts executing.
666 */
667 break;
668
669 case GSI_UACPROC:
670 if (nbytes < sizeof(unsigned int))
671 return -EINVAL;
672 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK;
673 if (put_user(w, (unsigned int __user *)buffer))
674 return -EFAULT;
675 return 1;
676
677 case GSI_PROC_TYPE:
678 if (nbytes < sizeof(unsigned long))
679 return -EINVAL;
680 cpu = (struct percpu_struct*)
681 ((char*)hwrpb + hwrpb->processor_offset);
682 w = cpu->type;
683 if (put_user(w, (unsigned long __user*)buffer))
684 return -EFAULT;
685 return 1;
686
687 case GSI_GET_HWRPB:
688 if (nbytes < sizeof(*hwrpb))
689 return -EINVAL;
690 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
691 return -EFAULT;
692 return 1;
693
694 default:
695 break;
696 }
697
698 return -EOPNOTSUPP;
699 }
700
701 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
702 unsigned long, nbytes, int __user *, start, void __user *, arg)
703 {
704 switch (op) {
705 case SSI_IEEE_FP_CONTROL: {
706 unsigned long swcr, fpcr;
707 unsigned int *state;
708
709 /*
710 * Alpha Architecture Handbook 4.7.7.3:
711 * To be fully IEEE compiant, we must track the current IEEE
712 * exception state in software, because spurious bits can be
713 * set in the trap shadow of a software-complete insn.
714 */
715
716 if (get_user(swcr, (unsigned long __user *)buffer))
717 return -EFAULT;
718 state = &current_thread_info()->ieee_state;
719
720 /* Update softare trap enable bits. */
721 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
722
723 /* Update the real fpcr. */
724 fpcr = rdfpcr() & FPCR_DYN_MASK;
725 fpcr |= ieee_swcr_to_fpcr(swcr);
726 wrfpcr(fpcr);
727
728 return 0;
729 }
730
731 case SSI_IEEE_RAISE_EXCEPTION: {
732 unsigned long exc, swcr, fpcr, fex;
733 unsigned int *state;
734
735 if (get_user(exc, (unsigned long __user *)buffer))
736 return -EFAULT;
737 state = &current_thread_info()->ieee_state;
738 exc &= IEEE_STATUS_MASK;
739
740 /* Update softare trap enable bits. */
741 swcr = (*state & IEEE_SW_MASK) | exc;
742 *state |= exc;
743
744 /* Update the real fpcr. */
745 fpcr = rdfpcr();
746 fpcr |= ieee_swcr_to_fpcr(swcr);
747 wrfpcr(fpcr);
748
749 /* If any exceptions set by this call, and are unmasked,
750 send a signal. Old exceptions are not signaled. */
751 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
752 if (fex) {
753 siginfo_t info;
754 int si_code = 0;
755
756 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
757 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
758 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
759 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
760 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
761 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
762
763 info.si_signo = SIGFPE;
764 info.si_errno = 0;
765 info.si_code = si_code;
766 info.si_addr = NULL; /* FIXME */
767 send_sig_info(SIGFPE, &info, current);
768 }
769 return 0;
770 }
771
772 case SSI_IEEE_STATE_AT_SIGNAL:
773 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
774 /*
775 * Not sure anybody will ever use this weird stuff. These
776 * ops can be used (under OSF/1) to set the fpcr that should
777 * be used when a signal handler starts executing.
778 */
779 break;
780
781 case SSI_NVPAIRS: {
782 unsigned long v, w, i;
783 unsigned int old, new;
784
785 for (i = 0; i < nbytes; ++i) {
786
787 if (get_user(v, 2*i + (unsigned int __user *)buffer))
788 return -EFAULT;
789 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
790 return -EFAULT;
791 switch (v) {
792 case SSIN_UACPROC:
793 again:
794 old = current_thread_info()->flags;
795 new = old & ~(UAC_BITMASK << UAC_SHIFT);
796 new = new | (w & UAC_BITMASK) << UAC_SHIFT;
797 if (cmpxchg(&current_thread_info()->flags,
798 old, new) != old)
799 goto again;
800 break;
801
802 default:
803 return -EOPNOTSUPP;
804 }
805 }
806 return 0;
807 }
808
809 default:
810 break;
811 }
812
813 return -EOPNOTSUPP;
814 }
815
816 /* Translations due to the fact that OSF's time_t is an int. Which
817 affects all sorts of things, like timeval and itimerval. */
818
819 extern struct timezone sys_tz;
820
821 struct timeval32
822 {
823 int tv_sec, tv_usec;
824 };
825
826 struct itimerval32
827 {
828 struct timeval32 it_interval;
829 struct timeval32 it_value;
830 };
831
832 static inline long
833 get_tv32(struct timeval *o, struct timeval32 __user *i)
834 {
835 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
836 (__get_user(o->tv_sec, &i->tv_sec) |
837 __get_user(o->tv_usec, &i->tv_usec)));
838 }
839
840 static inline long
841 put_tv32(struct timeval32 __user *o, struct timeval *i)
842 {
843 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
844 (__put_user(i->tv_sec, &o->tv_sec) |
845 __put_user(i->tv_usec, &o->tv_usec)));
846 }
847
848 static inline long
849 get_it32(struct itimerval *o, struct itimerval32 __user *i)
850 {
851 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
852 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
853 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
854 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
855 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
856 }
857
858 static inline long
859 put_it32(struct itimerval32 __user *o, struct itimerval *i)
860 {
861 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
862 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
863 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
864 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
865 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
866 }
867
868 static inline void
869 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
870 {
871 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
872 value->tv_sec = jiffies / HZ;
873 }
874
875 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
876 struct timezone __user *, tz)
877 {
878 if (tv) {
879 struct timeval ktv;
880 do_gettimeofday(&ktv);
881 if (put_tv32(tv, &ktv))
882 return -EFAULT;
883 }
884 if (tz) {
885 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
886 return -EFAULT;
887 }
888 return 0;
889 }
890
891 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
892 struct timezone __user *, tz)
893 {
894 struct timespec kts;
895 struct timezone ktz;
896
897 if (tv) {
898 if (get_tv32((struct timeval *)&kts, tv))
899 return -EFAULT;
900 }
901 if (tz) {
902 if (copy_from_user(&ktz, tz, sizeof(*tz)))
903 return -EFAULT;
904 }
905
906 kts.tv_nsec *= 1000;
907
908 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
909 }
910
911 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
912 {
913 struct itimerval kit;
914 int error;
915
916 error = do_getitimer(which, &kit);
917 if (!error && put_it32(it, &kit))
918 error = -EFAULT;
919
920 return error;
921 }
922
923 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
924 struct itimerval32 __user *, out)
925 {
926 struct itimerval kin, kout;
927 int error;
928
929 if (in) {
930 if (get_it32(&kin, in))
931 return -EFAULT;
932 } else
933 memset(&kin, 0, sizeof(kin));
934
935 error = do_setitimer(which, &kin, out ? &kout : NULL);
936 if (error || !out)
937 return error;
938
939 if (put_it32(out, &kout))
940 return -EFAULT;
941
942 return 0;
943
944 }
945
946 SYSCALL_DEFINE2(osf_utimes, char __user *, filename,
947 struct timeval32 __user *, tvs)
948 {
949 struct timespec tv[2];
950
951 if (tvs) {
952 struct timeval ktvs[2];
953 if (get_tv32(&ktvs[0], &tvs[0]) ||
954 get_tv32(&ktvs[1], &tvs[1]))
955 return -EFAULT;
956
957 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
958 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
959 return -EINVAL;
960
961 tv[0].tv_sec = ktvs[0].tv_sec;
962 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
963 tv[1].tv_sec = ktvs[1].tv_sec;
964 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
965 }
966
967 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
968 }
969
970 #define MAX_SELECT_SECONDS \
971 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
972
973 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
974 fd_set __user *, exp, struct timeval32 __user *, tvp)
975 {
976 struct timespec end_time, *to = NULL;
977 if (tvp) {
978 time_t sec, usec;
979
980 to = &end_time;
981
982 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
983 || __get_user(sec, &tvp->tv_sec)
984 || __get_user(usec, &tvp->tv_usec)) {
985 return -EFAULT;
986 }
987
988 if (sec < 0 || usec < 0)
989 return -EINVAL;
990
991 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC))
992 return -EINVAL;
993
994 }
995
996 /* OSF does not copy back the remaining time. */
997 return core_sys_select(n, inp, outp, exp, to);
998 }
999
1000 struct rusage32 {
1001 struct timeval32 ru_utime; /* user time used */
1002 struct timeval32 ru_stime; /* system time used */
1003 long ru_maxrss; /* maximum resident set size */
1004 long ru_ixrss; /* integral shared memory size */
1005 long ru_idrss; /* integral unshared data size */
1006 long ru_isrss; /* integral unshared stack size */
1007 long ru_minflt; /* page reclaims */
1008 long ru_majflt; /* page faults */
1009 long ru_nswap; /* swaps */
1010 long ru_inblock; /* block input operations */
1011 long ru_oublock; /* block output operations */
1012 long ru_msgsnd; /* messages sent */
1013 long ru_msgrcv; /* messages received */
1014 long ru_nsignals; /* signals received */
1015 long ru_nvcsw; /* voluntary context switches */
1016 long ru_nivcsw; /* involuntary " */
1017 };
1018
1019 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1020 {
1021 struct rusage32 r;
1022
1023 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1024 return -EINVAL;
1025
1026 memset(&r, 0, sizeof(r));
1027 switch (who) {
1028 case RUSAGE_SELF:
1029 jiffies_to_timeval32(current->utime, &r.ru_utime);
1030 jiffies_to_timeval32(current->stime, &r.ru_stime);
1031 r.ru_minflt = current->min_flt;
1032 r.ru_majflt = current->maj_flt;
1033 break;
1034 case RUSAGE_CHILDREN:
1035 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1036 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1037 r.ru_minflt = current->signal->cmin_flt;
1038 r.ru_majflt = current->signal->cmaj_flt;
1039 break;
1040 }
1041
1042 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1043 }
1044
1045 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1046 struct rusage32 __user *, ur)
1047 {
1048 struct rusage r;
1049 long ret, err;
1050 mm_segment_t old_fs;
1051
1052 if (!ur)
1053 return sys_wait4(pid, ustatus, options, NULL);
1054
1055 old_fs = get_fs();
1056
1057 set_fs (KERNEL_DS);
1058 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r);
1059 set_fs (old_fs);
1060
1061 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1062 return -EFAULT;
1063
1064 err = 0;
1065 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1066 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1067 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1068 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1069 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1070 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1071 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1072 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1073 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1074 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1075 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1076 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1077 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1078 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1079 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1080 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1081 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1082 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1083
1084 return err ? err : ret;
1085 }
1086
1087 /*
1088 * I don't know what the parameters are: the first one
1089 * seems to be a timeval pointer, and I suspect the second
1090 * one is the time remaining.. Ho humm.. No documentation.
1091 */
1092 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1093 struct timeval32 __user *, remain)
1094 {
1095 struct timeval tmp;
1096 unsigned long ticks;
1097
1098 if (get_tv32(&tmp, sleep))
1099 goto fault;
1100
1101 ticks = timeval_to_jiffies(&tmp);
1102
1103 ticks = schedule_timeout_interruptible(ticks);
1104
1105 if (remain) {
1106 jiffies_to_timeval(ticks, &tmp);
1107 if (put_tv32(remain, &tmp))
1108 goto fault;
1109 }
1110
1111 return 0;
1112 fault:
1113 return -EFAULT;
1114 }
1115
1116
1117 struct timex32 {
1118 unsigned int modes; /* mode selector */
1119 long offset; /* time offset (usec) */
1120 long freq; /* frequency offset (scaled ppm) */
1121 long maxerror; /* maximum error (usec) */
1122 long esterror; /* estimated error (usec) */
1123 int status; /* clock command/status */
1124 long constant; /* pll time constant */
1125 long precision; /* clock precision (usec) (read only) */
1126 long tolerance; /* clock frequency tolerance (ppm)
1127 * (read only)
1128 */
1129 struct timeval32 time; /* (read only) */
1130 long tick; /* (modified) usecs between clock ticks */
1131
1132 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1133 long jitter; /* pps jitter (us) (ro) */
1134 int shift; /* interval duration (s) (shift) (ro) */
1135 long stabil; /* pps stability (scaled ppm) (ro) */
1136 long jitcnt; /* jitter limit exceeded (ro) */
1137 long calcnt; /* calibration intervals (ro) */
1138 long errcnt; /* calibration errors (ro) */
1139 long stbcnt; /* stability limit exceeded (ro) */
1140
1141 int :32; int :32; int :32; int :32;
1142 int :32; int :32; int :32; int :32;
1143 int :32; int :32; int :32; int :32;
1144 };
1145
1146 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1147 {
1148 struct timex txc;
1149 int ret;
1150
1151 /* copy relevant bits of struct timex. */
1152 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1153 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1154 offsetof(struct timex32, time)))
1155 return -EFAULT;
1156
1157 ret = do_adjtimex(&txc);
1158 if (ret < 0)
1159 return ret;
1160
1161 /* copy back to timex32 */
1162 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1163 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1164 offsetof(struct timex32, tick))) ||
1165 (put_tv32(&txc_p->time, &txc.time)))
1166 return -EFAULT;
1167
1168 return ret;
1169 }
1170
1171 /* Get an address range which is currently unmapped. Similar to the
1172 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1173
1174 static unsigned long
1175 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1176 unsigned long limit)
1177 {
1178 struct vm_area_struct *vma = find_vma(current->mm, addr);
1179
1180 while (1) {
1181 /* At this point: (!vma || addr < vma->vm_end). */
1182 if (limit - len < addr)
1183 return -ENOMEM;
1184 if (!vma || addr + len <= vma->vm_start)
1185 return addr;
1186 addr = vma->vm_end;
1187 vma = vma->vm_next;
1188 }
1189 }
1190
1191 unsigned long
1192 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1193 unsigned long len, unsigned long pgoff,
1194 unsigned long flags)
1195 {
1196 unsigned long limit;
1197
1198 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1199 if (current->personality & ADDR_LIMIT_32BIT)
1200 limit = 0x80000000;
1201 else
1202 limit = TASK_SIZE;
1203
1204 if (len > limit)
1205 return -ENOMEM;
1206
1207 if (flags & MAP_FIXED)
1208 return addr;
1209
1210 /* First, see if the given suggestion fits.
1211
1212 The OSF/1 loader (/sbin/loader) relies on us returning an
1213 address larger than the requested if one exists, which is
1214 a terribly broken way to program.
1215
1216 That said, I can see the use in being able to suggest not
1217 merely specific addresses, but regions of memory -- perhaps
1218 this feature should be incorporated into all ports? */
1219
1220 if (addr) {
1221 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1222 if (addr != (unsigned long) -ENOMEM)
1223 return addr;
1224 }
1225
1226 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1227 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1228 len, limit);
1229 if (addr != (unsigned long) -ENOMEM)
1230 return addr;
1231
1232 /* Finally, try allocating in low memory. */
1233 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1234
1235 return addr;
1236 }
1237
1238 #ifdef CONFIG_OSF4_COMPAT
1239
1240 /* Clear top 32 bits of iov_len in the user's buffer for
1241 compatibility with old versions of OSF/1 where iov_len
1242 was defined as int. */
1243 static int
1244 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1245 {
1246 unsigned long i;
1247
1248 for (i = 0 ; i < count ; i++) {
1249 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1250
1251 if (put_user(0, iov_len_high))
1252 return -EFAULT;
1253 }
1254 return 0;
1255 }
1256
1257 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1258 const struct iovec __user *, vector, unsigned long, count)
1259 {
1260 if (unlikely(personality(current->personality) == PER_OSF4))
1261 if (osf_fix_iov_len(vector, count))
1262 return -EFAULT;
1263 return sys_readv(fd, vector, count);
1264 }
1265
1266 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1267 const struct iovec __user *, vector, unsigned long, count)
1268 {
1269 if (unlikely(personality(current->personality) == PER_OSF4))
1270 if (osf_fix_iov_len(vector, count))
1271 return -EFAULT;
1272 return sys_writev(fd, vector, count);
1273 }
1274
1275 #endif
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree