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alpha: fix several security issues
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / alpha / kernel / osf_sys.c
blob57825bbaf27f57514b091916173c6debd5981d8b
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/user.h>
24 #include <linux/utsname.h>
25 #include <linux/time.h>
26 #include <linux/timex.h>
27 #include <linux/major.h>
28 #include <linux/stat.h>
29 #include <linux/mman.h>
30 #include <linux/shm.h>
31 #include <linux/poll.h>
32 #include <linux/file.h>
33 #include <linux/types.h>
34 #include <linux/ipc.h>
35 #include <linux/namei.h>
36 #include <linux/uio.h>
37 #include <linux/vfs.h>
38 #include <linux/rcupdate.h>
39 #include <linux/slab.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 /*
50 * Brk needs to return an error. Still support Linux's brk(0) query idiom,
51 * which OSF programs just shouldn't be doing. We're still not quite
52 * identical to OSF as we don't return 0 on success, but doing otherwise
53 * would require changes to libc. Hopefully this is good enough.
54 */
55 SYSCALL_DEFINE1(osf_brk, unsigned long, brk)
56 {
57 unsigned long retval = sys_brk(brk);
58 if (brk && brk != retval)
59 retval = -ENOMEM;
60 return retval;
61 }
62
63 /*
64 * This is pure guess-work..
65 */
66 SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start,
67 unsigned long, text_len, unsigned long, bss_start,
68 unsigned long, bss_len)
69 {
70 struct mm_struct *mm;
71
72 lock_kernel();
73 mm = current->mm;
74 mm->end_code = bss_start + bss_len;
75 mm->start_brk = bss_start + bss_len;
76 mm->brk = bss_start + bss_len;
77 #if 0
78 printk("set_program_attributes(%lx %lx %lx %lx)\n",
79 text_start, text_len, bss_start, bss_len);
80 #endif
81 unlock_kernel();
82 return 0;
83 }
84
85 /*
86 * OSF/1 directory handling functions...
87 *
88 * The "getdents()" interface is much more sane: the "basep" stuff is
89 * braindamage (it can't really handle filesystems where the directory
90 * offset differences aren't the same as "d_reclen").
91 */
92 #define NAME_OFFSET offsetof (struct osf_dirent, d_name)
93
94 struct osf_dirent {
95 unsigned int d_ino;
96 unsigned short d_reclen;
97 unsigned short d_namlen;
98 char d_name[1];
99 };
100
101 struct osf_dirent_callback {
102 struct osf_dirent __user *dirent;
103 long __user *basep;
104 unsigned int count;
105 int error;
106 };
107
108 static int
109 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset,
110 u64 ino, unsigned int d_type)
111 {
112 struct osf_dirent __user *dirent;
113 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf;
114 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
115 unsigned int d_ino;
116
117 buf->error = -EINVAL; /* only used if we fail */
118 if (reclen > buf->count)
119 return -EINVAL;
120 d_ino = ino;
121 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
122 buf->error = -EOVERFLOW;
123 return -EOVERFLOW;
124 }
125 if (buf->basep) {
126 if (put_user(offset, buf->basep))
127 goto Efault;
128 buf->basep = NULL;
129 }
130 dirent = buf->dirent;
131 if (put_user(d_ino, &dirent->d_ino) ||
132 put_user(namlen, &dirent->d_namlen) ||
133 put_user(reclen, &dirent->d_reclen) ||
134 copy_to_user(dirent->d_name, name, namlen) ||
135 put_user(0, dirent->d_name + namlen))
136 goto Efault;
137 dirent = (void __user *)dirent + reclen;
138 buf->dirent = dirent;
139 buf->count -= reclen;
140 return 0;
141 Efault:
142 buf->error = -EFAULT;
143 return -EFAULT;
144 }
145
146 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
147 struct osf_dirent __user *, dirent, unsigned int, count,
148 long __user *, basep)
149 {
150 int error;
151 struct file *file;
152 struct osf_dirent_callback buf;
153
154 error = -EBADF;
155 file = fget(fd);
156 if (!file)
157 goto out;
158
159 buf.dirent = dirent;
160 buf.basep = basep;
161 buf.count = count;
162 buf.error = 0;
163
164 error = vfs_readdir(file, osf_filldir, &buf);
165 if (error >= 0)
166 error = buf.error;
167 if (count != buf.count)
168 error = count - buf.count;
169
170 fput(file);
171 out:
172 return error;
173 }
174
175 #undef NAME_OFFSET
176
177 SYSCALL_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 = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
193 out:
194 return ret;
195 }
196
197
198 /*
199 * The OSF/1 statfs structure is much larger, but this should
200 * match the beginning, at least.
201 */
202 struct osf_statfs {
203 short f_type;
204 short f_flags;
205 int f_fsize;
206 int f_bsize;
207 int f_blocks;
208 int f_bfree;
209 int f_bavail;
210 int f_files;
211 int f_ffree;
212 __kernel_fsid_t f_fsid;
213 };
214
215 static int
216 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
217 unsigned long bufsiz)
218 {
219 struct osf_statfs tmp_stat;
220
221 tmp_stat.f_type = linux_stat->f_type;
222 tmp_stat.f_flags = 0; /* mount flags */
223 tmp_stat.f_fsize = linux_stat->f_frsize;
224 tmp_stat.f_bsize = linux_stat->f_bsize;
225 tmp_stat.f_blocks = linux_stat->f_blocks;
226 tmp_stat.f_bfree = linux_stat->f_bfree;
227 tmp_stat.f_bavail = linux_stat->f_bavail;
228 tmp_stat.f_files = linux_stat->f_files;
229 tmp_stat.f_ffree = linux_stat->f_ffree;
230 tmp_stat.f_fsid = linux_stat->f_fsid;
231 if (bufsiz > sizeof(tmp_stat))
232 bufsiz = sizeof(tmp_stat);
233 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
234 }
235
236 static int
237 do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer,
238 unsigned long bufsiz)
239 {
240 struct kstatfs linux_stat;
241 int error = vfs_statfs(dentry, &linux_stat);
242 if (!error)
243 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
244 return error;
245 }
246
247 SYSCALL_DEFINE3(osf_statfs, char __user *, pathname,
248 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
249 {
250 struct path path;
251 int retval;
252
253 retval = user_path(pathname, &path);
254 if (!retval) {
255 retval = do_osf_statfs(path.dentry, buffer, bufsiz);
256 path_put(&path);
257 }
258 return retval;
259 }
260
261 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
262 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
263 {
264 struct file *file;
265 int retval;
266
267 retval = -EBADF;
268 file = fget(fd);
269 if (file) {
270 retval = do_osf_statfs(file->f_path.dentry, buffer, bufsiz);
271 fput(file);
272 }
273 return retval;
274 }
275
276 /*
277 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
278 *
279 * Although to be frank, neither are the native Linux/i386 ones..
280 */
281 struct ufs_args {
282 char __user *devname;
283 int flags;
284 uid_t exroot;
285 };
286
287 struct cdfs_args {
288 char __user *devname;
289 int flags;
290 uid_t exroot;
291
292 /* This has lots more here, which Linux handles with the option block
293 but I'm too lazy to do the translation into ASCII. */
294 };
295
296 struct procfs_args {
297 char __user *devname;
298 int flags;
299 uid_t exroot;
300 };
301
302 /*
303 * We can't actually handle ufs yet, so we translate UFS mounts to
304 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
305 * layout is so braindead it's a major headache doing it.
306 *
307 * Just how long ago was it written? OTOH our UFS driver may be still
308 * unhappy with OSF UFS. [CHECKME]
309 */
310 static int
311 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
312 {
313 int retval;
314 struct cdfs_args tmp;
315 char *devname;
316
317 retval = -EFAULT;
318 if (copy_from_user(&tmp, args, sizeof(tmp)))
319 goto out;
320 devname = getname(tmp.devname);
321 retval = PTR_ERR(devname);
322 if (IS_ERR(devname))
323 goto out;
324 retval = do_mount(devname, dirname, "ext2", flags, NULL);
325 putname(devname);
326 out:
327 return retval;
328 }
329
330 static int
331 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
332 {
333 int retval;
334 struct cdfs_args tmp;
335 char *devname;
336
337 retval = -EFAULT;
338 if (copy_from_user(&tmp, args, sizeof(tmp)))
339 goto out;
340 devname = getname(tmp.devname);
341 retval = PTR_ERR(devname);
342 if (IS_ERR(devname))
343 goto out;
344 retval = do_mount(devname, dirname, "iso9660", flags, NULL);
345 putname(devname);
346 out:
347 return retval;
348 }
349
350 static int
351 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags)
352 {
353 struct procfs_args tmp;
354
355 if (copy_from_user(&tmp, args, sizeof(tmp)))
356 return -EFAULT;
357
358 return do_mount("", dirname, "proc", flags, NULL);
359 }
360
361 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, char __user *, path,
362 int, flag, void __user *, data)
363 {
364 int retval;
365 char *name;
366
367 name = getname(path);
368 retval = PTR_ERR(name);
369 if (IS_ERR(name))
370 goto out;
371 switch (typenr) {
372 case 1:
373 retval = osf_ufs_mount(name, data, flag);
374 break;
375 case 6:
376 retval = osf_cdfs_mount(name, data, flag);
377 break;
378 case 9:
379 retval = osf_procfs_mount(name, data, flag);
380 break;
381 default:
382 retval = -EINVAL;
383 printk("osf_mount(%ld, %x)\n", typenr, flag);
384 }
385 putname(name);
386 out:
387 return retval;
388 }
389
390 SYSCALL_DEFINE1(osf_utsname, char __user *, name)
391 {
392 int error;
393
394 down_read(&uts_sem);
395 error = -EFAULT;
396 if (copy_to_user(name + 0, utsname()->sysname, 32))
397 goto out;
398 if (copy_to_user(name + 32, utsname()->nodename, 32))
399 goto out;
400 if (copy_to_user(name + 64, utsname()->release, 32))
401 goto out;
402 if (copy_to_user(name + 96, utsname()->version, 32))
403 goto out;
404 if (copy_to_user(name + 128, utsname()->machine, 32))
405 goto out;
406
407 error = 0;
408 out:
409 up_read(&uts_sem);
410 return error;
411 }
412
413 SYSCALL_DEFINE0(getpagesize)
414 {
415 return PAGE_SIZE;
416 }
417
418 SYSCALL_DEFINE0(getdtablesize)
419 {
420 return sysctl_nr_open;
421 }
422
423 /*
424 * For compatibility with OSF/1 only. Use utsname(2) instead.
425 */
426 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
427 {
428 unsigned len;
429 int i;
430
431 if (!access_ok(VERIFY_WRITE, name, namelen))
432 return -EFAULT;
433
434 len = namelen;
435 if (len > 32)
436 len = 32;
437
438 down_read(&uts_sem);
439 for (i = 0; i < len; ++i) {
440 __put_user(utsname()->domainname[i], name + i);
441 if (utsname()->domainname[i] == '\0')
442 break;
443 }
444 up_read(&uts_sem);
445
446 return 0;
447 }
448
449 /*
450 * The following stuff should move into a header file should it ever
451 * be labeled "officially supported." Right now, there is just enough
452 * support to avoid applications (such as tar) printing error
453 * messages. The attributes are not really implemented.
454 */
455
456 /*
457 * Values for Property list entry flag
458 */
459 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
460 by default */
461 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
462 #define PLE_FLAG_ALL -1 /* All flag value */
463
464 struct proplistname_args {
465 unsigned int pl_mask;
466 unsigned int pl_numnames;
467 char **pl_names;
468 };
469
470 union pl_args {
471 struct setargs {
472 char __user *path;
473 long follow;
474 long nbytes;
475 char __user *buf;
476 } set;
477 struct fsetargs {
478 long fd;
479 long nbytes;
480 char __user *buf;
481 } fset;
482 struct getargs {
483 char __user *path;
484 long follow;
485 struct proplistname_args __user *name_args;
486 long nbytes;
487 char __user *buf;
488 int __user *min_buf_size;
489 } get;
490 struct fgetargs {
491 long fd;
492 struct proplistname_args __user *name_args;
493 long nbytes;
494 char __user *buf;
495 int __user *min_buf_size;
496 } fget;
497 struct delargs {
498 char __user *path;
499 long follow;
500 struct proplistname_args __user *name_args;
501 } del;
502 struct fdelargs {
503 long fd;
504 struct proplistname_args __user *name_args;
505 } fdel;
506 };
507
508 enum pl_code {
509 PL_SET = 1, PL_FSET = 2,
510 PL_GET = 3, PL_FGET = 4,
511 PL_DEL = 5, PL_FDEL = 6
512 };
513
514 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
515 union pl_args __user *, args)
516 {
517 long error;
518 int __user *min_buf_size_ptr;
519
520 lock_kernel();
521 switch (code) {
522 case PL_SET:
523 if (get_user(error, &args->set.nbytes))
524 error = -EFAULT;
525 break;
526 case PL_FSET:
527 if (get_user(error, &args->fset.nbytes))
528 error = -EFAULT;
529 break;
530 case PL_GET:
531 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
532 if (error)
533 break;
534 error = put_user(0, min_buf_size_ptr);
535 break;
536 case PL_FGET:
537 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
538 if (error)
539 break;
540 error = put_user(0, min_buf_size_ptr);
541 break;
542 case PL_DEL:
543 case PL_FDEL:
544 error = 0;
545 break;
546 default:
547 error = -EOPNOTSUPP;
548 break;
549 };
550 unlock_kernel();
551 return error;
552 }
553
554 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
555 struct sigstack __user *, uoss)
556 {
557 unsigned long usp = rdusp();
558 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
559 unsigned long oss_os = on_sig_stack(usp);
560 int error;
561
562 if (uss) {
563 void __user *ss_sp;
564
565 error = -EFAULT;
566 if (get_user(ss_sp, &uss->ss_sp))
567 goto out;
568
569 /* If the current stack was set with sigaltstack, don't
570 swap stacks while we are on it. */
571 error = -EPERM;
572 if (current->sas_ss_sp && on_sig_stack(usp))
573 goto out;
574
575 /* Since we don't know the extent of the stack, and we don't
576 track onstack-ness, but rather calculate it, we must
577 presume a size. Ho hum this interface is lossy. */
578 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
579 current->sas_ss_size = SIGSTKSZ;
580 }
581
582 if (uoss) {
583 error = -EFAULT;
584 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
585 || __put_user(oss_sp, &uoss->ss_sp)
586 || __put_user(oss_os, &uoss->ss_onstack))
587 goto out;
588 }
589
590 error = 0;
591 out:
592 return error;
593 }
594
595 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
596 {
597 char *sysinfo_table[] = {
598 utsname()->sysname,
599 utsname()->nodename,
600 utsname()->release,
601 utsname()->version,
602 utsname()->machine,
603 "alpha", /* instruction set architecture */
604 "dummy", /* hardware serial number */
605 "dummy", /* hardware manufacturer */
606 "dummy", /* secure RPC domain */
607 };
608 unsigned long offset;
609 char *res;
610 long len, err = -EINVAL;
611
612 offset = command-1;
613 if (offset >= ARRAY_SIZE(sysinfo_table)) {
614 /* Digital UNIX has a few unpublished interfaces here */
615 printk("sysinfo(%d)", command);
616 goto out;
617 }
618
619 down_read(&uts_sem);
620 res = sysinfo_table[offset];
621 len = strlen(res)+1;
622 if ((unsigned long)len > (unsigned long)count)
623 len = count;
624 if (copy_to_user(buf, res, len))
625 err = -EFAULT;
626 else
627 err = 0;
628 up_read(&uts_sem);
629 out:
630 return err;
631 }
632
633 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
634 unsigned long, nbytes, int __user *, start, void __user *, arg)
635 {
636 unsigned long w;
637 struct percpu_struct *cpu;
638
639 switch (op) {
640 case GSI_IEEE_FP_CONTROL:
641 /* Return current software fp control & status bits. */
642 /* Note that DU doesn't verify available space here. */
643
644 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
645 w = swcr_update_status(w, rdfpcr());
646 if (put_user(w, (unsigned long __user *) buffer))
647 return -EFAULT;
648 return 0;
649
650 case GSI_IEEE_STATE_AT_SIGNAL:
651 /*
652 * Not sure anybody will ever use this weird stuff. These
653 * ops can be used (under OSF/1) to set the fpcr that should
654 * be used when a signal handler starts executing.
655 */
656 break;
657
658 case GSI_UACPROC:
659 if (nbytes < sizeof(unsigned int))
660 return -EINVAL;
661 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK;
662 if (put_user(w, (unsigned int __user *)buffer))
663 return -EFAULT;
664 return 1;
665
666 case GSI_PROC_TYPE:
667 if (nbytes < sizeof(unsigned long))
668 return -EINVAL;
669 cpu = (struct percpu_struct*)
670 ((char*)hwrpb + hwrpb->processor_offset);
671 w = cpu->type;
672 if (put_user(w, (unsigned long __user*)buffer))
673 return -EFAULT;
674 return 1;
675
676 case GSI_GET_HWRPB:
677 if (nbytes > sizeof(*hwrpb))
678 return -EINVAL;
679 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
680 return -EFAULT;
681 return 1;
682
683 default:
684 break;
685 }
686
687 return -EOPNOTSUPP;
688 }
689
690 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
691 unsigned long, nbytes, int __user *, start, void __user *, arg)
692 {
693 switch (op) {
694 case SSI_IEEE_FP_CONTROL: {
695 unsigned long swcr, fpcr;
696 unsigned int *state;
697
698 /*
699 * Alpha Architecture Handbook 4.7.7.3:
700 * To be fully IEEE compiant, we must track the current IEEE
701 * exception state in software, because spurious bits can be
702 * set in the trap shadow of a software-complete insn.
703 */
704
705 if (get_user(swcr, (unsigned long __user *)buffer))
706 return -EFAULT;
707 state = &current_thread_info()->ieee_state;
708
709 /* Update softare trap enable bits. */
710 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
711
712 /* Update the real fpcr. */
713 fpcr = rdfpcr() & FPCR_DYN_MASK;
714 fpcr |= ieee_swcr_to_fpcr(swcr);
715 wrfpcr(fpcr);
716
717 return 0;
718 }
719
720 case SSI_IEEE_RAISE_EXCEPTION: {
721 unsigned long exc, swcr, fpcr, fex;
722 unsigned int *state;
723
724 if (get_user(exc, (unsigned long __user *)buffer))
725 return -EFAULT;
726 state = &current_thread_info()->ieee_state;
727 exc &= IEEE_STATUS_MASK;
728
729 /* Update softare trap enable bits. */
730 swcr = (*state & IEEE_SW_MASK) | exc;
731 *state |= exc;
732
733 /* Update the real fpcr. */
734 fpcr = rdfpcr();
735 fpcr |= ieee_swcr_to_fpcr(swcr);
736 wrfpcr(fpcr);
737
738 /* If any exceptions set by this call, and are unmasked,
739 send a signal. Old exceptions are not signaled. */
740 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
741 if (fex) {
742 siginfo_t info;
743 int si_code = 0;
744
745 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
746 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
747 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
748 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
749 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
750 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
751
752 info.si_signo = SIGFPE;
753 info.si_errno = 0;
754 info.si_code = si_code;
755 info.si_addr = NULL; /* FIXME */
756 send_sig_info(SIGFPE, &info, current);
757 }
758 return 0;
759 }
760
761 case SSI_IEEE_STATE_AT_SIGNAL:
762 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
763 /*
764 * Not sure anybody will ever use this weird stuff. These
765 * ops can be used (under OSF/1) to set the fpcr that should
766 * be used when a signal handler starts executing.
767 */
768 break;
769
770 case SSI_NVPAIRS: {
771 unsigned long v, w, i;
772 unsigned int old, new;
773
774 for (i = 0; i < nbytes; ++i) {
775
776 if (get_user(v, 2*i + (unsigned int __user *)buffer))
777 return -EFAULT;
778 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
779 return -EFAULT;
780 switch (v) {
781 case SSIN_UACPROC:
782 again:
783 old = current_thread_info()->flags;
784 new = old & ~(UAC_BITMASK << UAC_SHIFT);
785 new = new | (w & UAC_BITMASK) << UAC_SHIFT;
786 if (cmpxchg(&current_thread_info()->flags,
787 old, new) != old)
788 goto again;
789 break;
790
791 default:
792 return -EOPNOTSUPP;
793 }
794 }
795 return 0;
796 }
797
798 default:
799 break;
800 }
801
802 return -EOPNOTSUPP;
803 }
804
805 /* Translations due to the fact that OSF's time_t is an int. Which
806 affects all sorts of things, like timeval and itimerval. */
807
808 extern struct timezone sys_tz;
809
810 struct timeval32
811 {
812 int tv_sec, tv_usec;
813 };
814
815 struct itimerval32
816 {
817 struct timeval32 it_interval;
818 struct timeval32 it_value;
819 };
820
821 static inline long
822 get_tv32(struct timeval *o, struct timeval32 __user *i)
823 {
824 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
825 (__get_user(o->tv_sec, &i->tv_sec) |
826 __get_user(o->tv_usec, &i->tv_usec)));
827 }
828
829 static inline long
830 put_tv32(struct timeval32 __user *o, struct timeval *i)
831 {
832 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
833 (__put_user(i->tv_sec, &o->tv_sec) |
834 __put_user(i->tv_usec, &o->tv_usec)));
835 }
836
837 static inline long
838 get_it32(struct itimerval *o, struct itimerval32 __user *i)
839 {
840 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
841 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
842 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
843 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
844 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
845 }
846
847 static inline long
848 put_it32(struct itimerval32 __user *o, struct itimerval *i)
849 {
850 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
851 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
852 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
853 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
854 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
855 }
856
857 static inline void
858 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
859 {
860 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
861 value->tv_sec = jiffies / HZ;
862 }
863
864 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
865 struct timezone __user *, tz)
866 {
867 if (tv) {
868 struct timeval ktv;
869 do_gettimeofday(&ktv);
870 if (put_tv32(tv, &ktv))
871 return -EFAULT;
872 }
873 if (tz) {
874 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
875 return -EFAULT;
876 }
877 return 0;
878 }
879
880 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
881 struct timezone __user *, tz)
882 {
883 struct timespec kts;
884 struct timezone ktz;
885
886 if (tv) {
887 if (get_tv32((struct timeval *)&kts, tv))
888 return -EFAULT;
889 }
890 if (tz) {
891 if (copy_from_user(&ktz, tz, sizeof(*tz)))
892 return -EFAULT;
893 }
894
895 kts.tv_nsec *= 1000;
896
897 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
898 }
899
900 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
901 {
902 struct itimerval kit;
903 int error;
904
905 error = do_getitimer(which, &kit);
906 if (!error && put_it32(it, &kit))
907 error = -EFAULT;
908
909 return error;
910 }
911
912 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
913 struct itimerval32 __user *, out)
914 {
915 struct itimerval kin, kout;
916 int error;
917
918 if (in) {
919 if (get_it32(&kin, in))
920 return -EFAULT;
921 } else
922 memset(&kin, 0, sizeof(kin));
923
924 error = do_setitimer(which, &kin, out ? &kout : NULL);
925 if (error || !out)
926 return error;
927
928 if (put_it32(out, &kout))
929 return -EFAULT;
930
931 return 0;
932
933 }
934
935 SYSCALL_DEFINE2(osf_utimes, char __user *, filename,
936 struct timeval32 __user *, tvs)
937 {
938 struct timespec tv[2];
939
940 if (tvs) {
941 struct timeval ktvs[2];
942 if (get_tv32(&ktvs[0], &tvs[0]) ||
943 get_tv32(&ktvs[1], &tvs[1]))
944 return -EFAULT;
945
946 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
947 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
948 return -EINVAL;
949
950 tv[0].tv_sec = ktvs[0].tv_sec;
951 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
952 tv[1].tv_sec = ktvs[1].tv_sec;
953 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
954 }
955
956 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
957 }
958
959 #define MAX_SELECT_SECONDS \
960 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
961
962 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
963 fd_set __user *, exp, struct timeval32 __user *, tvp)
964 {
965 struct timespec end_time, *to = NULL;
966 if (tvp) {
967 time_t sec, usec;
968
969 to = &end_time;
970
971 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
972 || __get_user(sec, &tvp->tv_sec)
973 || __get_user(usec, &tvp->tv_usec)) {
974 return -EFAULT;
975 }
976
977 if (sec < 0 || usec < 0)
978 return -EINVAL;
979
980 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC))
981 return -EINVAL;
982
983 }
984
985 /* OSF does not copy back the remaining time. */
986 return core_sys_select(n, inp, outp, exp, to);
987 }
988
989 struct rusage32 {
990 struct timeval32 ru_utime; /* user time used */
991 struct timeval32 ru_stime; /* system time used */
992 long ru_maxrss; /* maximum resident set size */
993 long ru_ixrss; /* integral shared memory size */
994 long ru_idrss; /* integral unshared data size */
995 long ru_isrss; /* integral unshared stack size */
996 long ru_minflt; /* page reclaims */
997 long ru_majflt; /* page faults */
998 long ru_nswap; /* swaps */
999 long ru_inblock; /* block input operations */
1000 long ru_oublock; /* block output operations */
1001 long ru_msgsnd; /* messages sent */
1002 long ru_msgrcv; /* messages received */
1003 long ru_nsignals; /* signals received */
1004 long ru_nvcsw; /* voluntary context switches */
1005 long ru_nivcsw; /* involuntary " */
1006 };
1007
1008 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1009 {
1010 struct rusage32 r;
1011
1012 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1013 return -EINVAL;
1014
1015 memset(&r, 0, sizeof(r));
1016 switch (who) {
1017 case RUSAGE_SELF:
1018 jiffies_to_timeval32(current->utime, &r.ru_utime);
1019 jiffies_to_timeval32(current->stime, &r.ru_stime);
1020 r.ru_minflt = current->min_flt;
1021 r.ru_majflt = current->maj_flt;
1022 break;
1023 case RUSAGE_CHILDREN:
1024 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1025 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1026 r.ru_minflt = current->signal->cmin_flt;
1027 r.ru_majflt = current->signal->cmaj_flt;
1028 break;
1029 }
1030
1031 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1032 }
1033
1034 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1035 struct rusage32 __user *, ur)
1036 {
1037 struct rusage r;
1038 long ret, err;
1039 unsigned int status = 0;
1040 mm_segment_t old_fs;
1041
1042 if (!ur)
1043 return sys_wait4(pid, ustatus, options, NULL);
1044
1045 old_fs = get_fs();
1046
1047 set_fs (KERNEL_DS);
1048 ret = sys_wait4(pid, (unsigned int __user *) &status, options,
1049 (struct rusage __user *) &r);
1050 set_fs (old_fs);
1051
1052 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1053 return -EFAULT;
1054
1055 err = 0;
1056 err |= put_user(status, ustatus);
1057 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1058 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1059 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1060 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1061 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1062 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1063 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1064 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1065 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1066 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1067 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1068 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1069 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1070 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1071 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1072 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1073 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1074 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1075
1076 return err ? err : ret;
1077 }
1078
1079 /*
1080 * I don't know what the parameters are: the first one
1081 * seems to be a timeval pointer, and I suspect the second
1082 * one is the time remaining.. Ho humm.. No documentation.
1083 */
1084 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1085 struct timeval32 __user *, remain)
1086 {
1087 struct timeval tmp;
1088 unsigned long ticks;
1089
1090 if (get_tv32(&tmp, sleep))
1091 goto fault;
1092
1093 ticks = timeval_to_jiffies(&tmp);
1094
1095 ticks = schedule_timeout_interruptible(ticks);
1096
1097 if (remain) {
1098 jiffies_to_timeval(ticks, &tmp);
1099 if (put_tv32(remain, &tmp))
1100 goto fault;
1101 }
1102
1103 return 0;
1104 fault:
1105 return -EFAULT;
1106 }
1107
1108
1109 struct timex32 {
1110 unsigned int modes; /* mode selector */
1111 long offset; /* time offset (usec) */
1112 long freq; /* frequency offset (scaled ppm) */
1113 long maxerror; /* maximum error (usec) */
1114 long esterror; /* estimated error (usec) */
1115 int status; /* clock command/status */
1116 long constant; /* pll time constant */
1117 long precision; /* clock precision (usec) (read only) */
1118 long tolerance; /* clock frequency tolerance (ppm)
1119 * (read only)
1120 */
1121 struct timeval32 time; /* (read only) */
1122 long tick; /* (modified) usecs between clock ticks */
1123
1124 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1125 long jitter; /* pps jitter (us) (ro) */
1126 int shift; /* interval duration (s) (shift) (ro) */
1127 long stabil; /* pps stability (scaled ppm) (ro) */
1128 long jitcnt; /* jitter limit exceeded (ro) */
1129 long calcnt; /* calibration intervals (ro) */
1130 long errcnt; /* calibration errors (ro) */
1131 long stbcnt; /* stability limit exceeded (ro) */
1132
1133 int :32; int :32; int :32; int :32;
1134 int :32; int :32; int :32; int :32;
1135 int :32; int :32; int :32; int :32;
1136 };
1137
1138 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1139 {
1140 struct timex txc;
1141 int ret;
1142
1143 /* copy relevant bits of struct timex. */
1144 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1145 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1146 offsetof(struct timex32, time)))
1147 return -EFAULT;
1148
1149 ret = do_adjtimex(&txc);
1150 if (ret < 0)
1151 return ret;
1152
1153 /* copy back to timex32 */
1154 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1155 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1156 offsetof(struct timex32, tick))) ||
1157 (put_tv32(&txc_p->time, &txc.time)))
1158 return -EFAULT;
1159
1160 return ret;
1161 }
1162
1163 /* Get an address range which is currently unmapped. Similar to the
1164 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1165
1166 static unsigned long
1167 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1168 unsigned long limit)
1169 {
1170 struct vm_area_struct *vma = find_vma(current->mm, addr);
1171
1172 while (1) {
1173 /* At this point: (!vma || addr < vma->vm_end). */
1174 if (limit - len < addr)
1175 return -ENOMEM;
1176 if (!vma || addr + len <= vma->vm_start)
1177 return addr;
1178 addr = vma->vm_end;
1179 vma = vma->vm_next;
1180 }
1181 }
1182
1183 unsigned long
1184 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1185 unsigned long len, unsigned long pgoff,
1186 unsigned long flags)
1187 {
1188 unsigned long limit;
1189
1190 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1191 if (current->personality & ADDR_LIMIT_32BIT)
1192 limit = 0x80000000;
1193 else
1194 limit = TASK_SIZE;
1195
1196 if (len > limit)
1197 return -ENOMEM;
1198
1199 if (flags & MAP_FIXED)
1200 return addr;
1201
1202 /* First, see if the given suggestion fits.
1203
1204 The OSF/1 loader (/sbin/loader) relies on us returning an
1205 address larger than the requested if one exists, which is
1206 a terribly broken way to program.
1207
1208 That said, I can see the use in being able to suggest not
1209 merely specific addresses, but regions of memory -- perhaps
1210 this feature should be incorporated into all ports? */
1211
1212 if (addr) {
1213 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1214 if (addr != (unsigned long) -ENOMEM)
1215 return addr;
1216 }
1217
1218 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1219 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1220 len, limit);
1221 if (addr != (unsigned long) -ENOMEM)
1222 return addr;
1223
1224 /* Finally, try allocating in low memory. */
1225 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1226
1227 return addr;
1228 }
1229
1230 #ifdef CONFIG_OSF4_COMPAT
1231
1232 /* Clear top 32 bits of iov_len in the user's buffer for
1233 compatibility with old versions of OSF/1 where iov_len
1234 was defined as int. */
1235 static int
1236 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1237 {
1238 unsigned long i;
1239
1240 for (i = 0 ; i < count ; i++) {
1241 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1242
1243 if (put_user(0, iov_len_high))
1244 return -EFAULT;
1245 }
1246 return 0;
1247 }
1248
1249 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1250 const struct iovec __user *, vector, unsigned long, count)
1251 {
1252 if (unlikely(personality(current->personality) == PER_OSF4))
1253 if (osf_fix_iov_len(vector, count))
1254 return -EFAULT;
1255 return sys_readv(fd, vector, count);
1256 }
1257
1258 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1259 const struct iovec __user *, vector, unsigned long, count)
1260 {
1261 if (unlikely(personality(current->personality) == PER_OSF4))
1262 if (osf_fix_iov_len(vector, count))
1263 return -EFAULT;
1264 return sys_writev(fd, vector, count);
1265 }
1266
1267 #endif
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree