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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
blob326f0a2d56e52922920aad724dfec0e78487986a
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 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
234 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
235 {
236 struct kstatfs linux_stat;
237 int error = user_statfs(pathname, &linux_stat);
238 if (!error)
239 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
240 return error;
241 }
242
243 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
244 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
245 {
246 struct kstatfs linux_stat;
247 int error = fd_statfs(fd, &linux_stat);
248 if (!error)
249 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
250 return error;
251 }
252
253 /*
254 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
255 *
256 * Although to be frank, neither are the native Linux/i386 ones..
257 */
258 struct ufs_args {
259 char __user *devname;
260 int flags;
261 uid_t exroot;
262 };
263
264 struct cdfs_args {
265 char __user *devname;
266 int flags;
267 uid_t exroot;
268
269 /* This has lots more here, which Linux handles with the option block
270 but I'm too lazy to do the translation into ASCII. */
271 };
272
273 struct procfs_args {
274 char __user *devname;
275 int flags;
276 uid_t exroot;
277 };
278
279 /*
280 * We can't actually handle ufs yet, so we translate UFS mounts to
281 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
282 * layout is so braindead it's a major headache doing it.
283 *
284 * Just how long ago was it written? OTOH our UFS driver may be still
285 * unhappy with OSF UFS. [CHECKME]
286 */
287 static int
288 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
289 {
290 int retval;
291 struct cdfs_args tmp;
292 char *devname;
293
294 retval = -EFAULT;
295 if (copy_from_user(&tmp, args, sizeof(tmp)))
296 goto out;
297 devname = getname(tmp.devname);
298 retval = PTR_ERR(devname);
299 if (IS_ERR(devname))
300 goto out;
301 retval = do_mount(devname, dirname, "ext2", flags, NULL);
302 putname(devname);
303 out:
304 return retval;
305 }
306
307 static int
308 osf_cdfs_mount(char *dirname, struct cdfs_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, "iso9660", flags, NULL);
322 putname(devname);
323 out:
324 return retval;
325 }
326
327 static int
328 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags)
329 {
330 struct procfs_args tmp;
331
332 if (copy_from_user(&tmp, args, sizeof(tmp)))
333 return -EFAULT;
334
335 return do_mount("", dirname, "proc", flags, NULL);
336 }
337
338 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
339 int, flag, void __user *, data)
340 {
341 int retval;
342 char *name;
343
344 name = getname(path);
345 retval = PTR_ERR(name);
346 if (IS_ERR(name))
347 goto out;
348 switch (typenr) {
349 case 1:
350 retval = osf_ufs_mount(name, data, flag);
351 break;
352 case 6:
353 retval = osf_cdfs_mount(name, data, flag);
354 break;
355 case 9:
356 retval = osf_procfs_mount(name, data, flag);
357 break;
358 default:
359 retval = -EINVAL;
360 printk("osf_mount(%ld, %x)\n", typenr, flag);
361 }
362 putname(name);
363 out:
364 return retval;
365 }
366
367 SYSCALL_DEFINE1(osf_utsname, char __user *, name)
368 {
369 int error;
370
371 down_read(&uts_sem);
372 error = -EFAULT;
373 if (copy_to_user(name + 0, utsname()->sysname, 32))
374 goto out;
375 if (copy_to_user(name + 32, utsname()->nodename, 32))
376 goto out;
377 if (copy_to_user(name + 64, utsname()->release, 32))
378 goto out;
379 if (copy_to_user(name + 96, utsname()->version, 32))
380 goto out;
381 if (copy_to_user(name + 128, utsname()->machine, 32))
382 goto out;
383
384 error = 0;
385 out:
386 up_read(&uts_sem);
387 return error;
388 }
389
390 SYSCALL_DEFINE0(getpagesize)
391 {
392 return PAGE_SIZE;
393 }
394
395 SYSCALL_DEFINE0(getdtablesize)
396 {
397 return sysctl_nr_open;
398 }
399
400 /*
401 * For compatibility with OSF/1 only. Use utsname(2) instead.
402 */
403 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
404 {
405 unsigned len;
406 int i;
407
408 if (!access_ok(VERIFY_WRITE, name, namelen))
409 return -EFAULT;
410
411 len = namelen;
412 if (len > 32)
413 len = 32;
414
415 down_read(&uts_sem);
416 for (i = 0; i < len; ++i) {
417 __put_user(utsname()->domainname[i], name + i);
418 if (utsname()->domainname[i] == '\0')
419 break;
420 }
421 up_read(&uts_sem);
422
423 return 0;
424 }
425
426 /*
427 * The following stuff should move into a header file should it ever
428 * be labeled "officially supported." Right now, there is just enough
429 * support to avoid applications (such as tar) printing error
430 * messages. The attributes are not really implemented.
431 */
432
433 /*
434 * Values for Property list entry flag
435 */
436 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
437 by default */
438 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
439 #define PLE_FLAG_ALL -1 /* All flag value */
440
441 struct proplistname_args {
442 unsigned int pl_mask;
443 unsigned int pl_numnames;
444 char **pl_names;
445 };
446
447 union pl_args {
448 struct setargs {
449 char __user *path;
450 long follow;
451 long nbytes;
452 char __user *buf;
453 } set;
454 struct fsetargs {
455 long fd;
456 long nbytes;
457 char __user *buf;
458 } fset;
459 struct getargs {
460 char __user *path;
461 long follow;
462 struct proplistname_args __user *name_args;
463 long nbytes;
464 char __user *buf;
465 int __user *min_buf_size;
466 } get;
467 struct fgetargs {
468 long fd;
469 struct proplistname_args __user *name_args;
470 long nbytes;
471 char __user *buf;
472 int __user *min_buf_size;
473 } fget;
474 struct delargs {
475 char __user *path;
476 long follow;
477 struct proplistname_args __user *name_args;
478 } del;
479 struct fdelargs {
480 long fd;
481 struct proplistname_args __user *name_args;
482 } fdel;
483 };
484
485 enum pl_code {
486 PL_SET = 1, PL_FSET = 2,
487 PL_GET = 3, PL_FGET = 4,
488 PL_DEL = 5, PL_FDEL = 6
489 };
490
491 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
492 union pl_args __user *, args)
493 {
494 long error;
495 int __user *min_buf_size_ptr;
496
497 switch (code) {
498 case PL_SET:
499 if (get_user(error, &args->set.nbytes))
500 error = -EFAULT;
501 break;
502 case PL_FSET:
503 if (get_user(error, &args->fset.nbytes))
504 error = -EFAULT;
505 break;
506 case PL_GET:
507 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
508 if (error)
509 break;
510 error = put_user(0, min_buf_size_ptr);
511 break;
512 case PL_FGET:
513 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
514 if (error)
515 break;
516 error = put_user(0, min_buf_size_ptr);
517 break;
518 case PL_DEL:
519 case PL_FDEL:
520 error = 0;
521 break;
522 default:
523 error = -EOPNOTSUPP;
524 break;
525 };
526 return error;
527 }
528
529 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
530 struct sigstack __user *, uoss)
531 {
532 unsigned long usp = rdusp();
533 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
534 unsigned long oss_os = on_sig_stack(usp);
535 int error;
536
537 if (uss) {
538 void __user *ss_sp;
539
540 error = -EFAULT;
541 if (get_user(ss_sp, &uss->ss_sp))
542 goto out;
543
544 /* If the current stack was set with sigaltstack, don't
545 swap stacks while we are on it. */
546 error = -EPERM;
547 if (current->sas_ss_sp && on_sig_stack(usp))
548 goto out;
549
550 /* Since we don't know the extent of the stack, and we don't
551 track onstack-ness, but rather calculate it, we must
552 presume a size. Ho hum this interface is lossy. */
553 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
554 current->sas_ss_size = SIGSTKSZ;
555 }
556
557 if (uoss) {
558 error = -EFAULT;
559 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
560 || __put_user(oss_sp, &uoss->ss_sp)
561 || __put_user(oss_os, &uoss->ss_onstack))
562 goto out;
563 }
564
565 error = 0;
566 out:
567 return error;
568 }
569
570 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
571 {
572 const char *sysinfo_table[] = {
573 utsname()->sysname,
574 utsname()->nodename,
575 utsname()->release,
576 utsname()->version,
577 utsname()->machine,
578 "alpha", /* instruction set architecture */
579 "dummy", /* hardware serial number */
580 "dummy", /* hardware manufacturer */
581 "dummy", /* secure RPC domain */
582 };
583 unsigned long offset;
584 const char *res;
585 long len, err = -EINVAL;
586
587 offset = command-1;
588 if (offset >= ARRAY_SIZE(sysinfo_table)) {
589 /* Digital UNIX has a few unpublished interfaces here */
590 printk("sysinfo(%d)", command);
591 goto out;
592 }
593
594 down_read(&uts_sem);
595 res = sysinfo_table[offset];
596 len = strlen(res)+1;
597 if ((unsigned long)len > (unsigned long)count)
598 len = count;
599 if (copy_to_user(buf, res, len))
600 err = -EFAULT;
601 else
602 err = 0;
603 up_read(&uts_sem);
604 out:
605 return err;
606 }
607
608 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
609 unsigned long, nbytes, int __user *, start, void __user *, arg)
610 {
611 unsigned long w;
612 struct percpu_struct *cpu;
613
614 switch (op) {
615 case GSI_IEEE_FP_CONTROL:
616 /* Return current software fp control & status bits. */
617 /* Note that DU doesn't verify available space here. */
618
619 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
620 w = swcr_update_status(w, rdfpcr());
621 if (put_user(w, (unsigned long __user *) buffer))
622 return -EFAULT;
623 return 0;
624
625 case GSI_IEEE_STATE_AT_SIGNAL:
626 /*
627 * Not sure anybody will ever use this weird stuff. These
628 * ops can be used (under OSF/1) to set the fpcr that should
629 * be used when a signal handler starts executing.
630 */
631 break;
632
633 case GSI_UACPROC:
634 if (nbytes < sizeof(unsigned int))
635 return -EINVAL;
636 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK;
637 if (put_user(w, (unsigned int __user *)buffer))
638 return -EFAULT;
639 return 1;
640
641 case GSI_PROC_TYPE:
642 if (nbytes < sizeof(unsigned long))
643 return -EINVAL;
644 cpu = (struct percpu_struct*)
645 ((char*)hwrpb + hwrpb->processor_offset);
646 w = cpu->type;
647 if (put_user(w, (unsigned long __user*)buffer))
648 return -EFAULT;
649 return 1;
650
651 case GSI_GET_HWRPB:
652 if (nbytes > sizeof(*hwrpb))
653 return -EINVAL;
654 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
655 return -EFAULT;
656 return 1;
657
658 default:
659 break;
660 }
661
662 return -EOPNOTSUPP;
663 }
664
665 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
666 unsigned long, nbytes, int __user *, start, void __user *, arg)
667 {
668 switch (op) {
669 case SSI_IEEE_FP_CONTROL: {
670 unsigned long swcr, fpcr;
671 unsigned int *state;
672
673 /*
674 * Alpha Architecture Handbook 4.7.7.3:
675 * To be fully IEEE compiant, we must track the current IEEE
676 * exception state in software, because spurious bits can be
677 * set in the trap shadow of a software-complete insn.
678 */
679
680 if (get_user(swcr, (unsigned long __user *)buffer))
681 return -EFAULT;
682 state = &current_thread_info()->ieee_state;
683
684 /* Update softare trap enable bits. */
685 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
686
687 /* Update the real fpcr. */
688 fpcr = rdfpcr() & FPCR_DYN_MASK;
689 fpcr |= ieee_swcr_to_fpcr(swcr);
690 wrfpcr(fpcr);
691
692 return 0;
693 }
694
695 case SSI_IEEE_RAISE_EXCEPTION: {
696 unsigned long exc, swcr, fpcr, fex;
697 unsigned int *state;
698
699 if (get_user(exc, (unsigned long __user *)buffer))
700 return -EFAULT;
701 state = &current_thread_info()->ieee_state;
702 exc &= IEEE_STATUS_MASK;
703
704 /* Update softare trap enable bits. */
705 swcr = (*state & IEEE_SW_MASK) | exc;
706 *state |= exc;
707
708 /* Update the real fpcr. */
709 fpcr = rdfpcr();
710 fpcr |= ieee_swcr_to_fpcr(swcr);
711 wrfpcr(fpcr);
712
713 /* If any exceptions set by this call, and are unmasked,
714 send a signal. Old exceptions are not signaled. */
715 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
716 if (fex) {
717 siginfo_t info;
718 int si_code = 0;
719
720 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
721 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
722 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
723 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
724 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
725 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
726
727 info.si_signo = SIGFPE;
728 info.si_errno = 0;
729 info.si_code = si_code;
730 info.si_addr = NULL; /* FIXME */
731 send_sig_info(SIGFPE, &info, current);
732 }
733 return 0;
734 }
735
736 case SSI_IEEE_STATE_AT_SIGNAL:
737 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
738 /*
739 * Not sure anybody will ever use this weird stuff. These
740 * ops can be used (under OSF/1) to set the fpcr that should
741 * be used when a signal handler starts executing.
742 */
743 break;
744
745 case SSI_NVPAIRS: {
746 unsigned long v, w, i;
747 unsigned int old, new;
748
749 for (i = 0; i < nbytes; ++i) {
750
751 if (get_user(v, 2*i + (unsigned int __user *)buffer))
752 return -EFAULT;
753 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
754 return -EFAULT;
755 switch (v) {
756 case SSIN_UACPROC:
757 again:
758 old = current_thread_info()->flags;
759 new = old & ~(UAC_BITMASK << UAC_SHIFT);
760 new = new | (w & UAC_BITMASK) << UAC_SHIFT;
761 if (cmpxchg(&current_thread_info()->flags,
762 old, new) != old)
763 goto again;
764 break;
765
766 default:
767 return -EOPNOTSUPP;
768 }
769 }
770 return 0;
771 }
772
773 default:
774 break;
775 }
776
777 return -EOPNOTSUPP;
778 }
779
780 /* Translations due to the fact that OSF's time_t is an int. Which
781 affects all sorts of things, like timeval and itimerval. */
782
783 extern struct timezone sys_tz;
784
785 struct timeval32
786 {
787 int tv_sec, tv_usec;
788 };
789
790 struct itimerval32
791 {
792 struct timeval32 it_interval;
793 struct timeval32 it_value;
794 };
795
796 static inline long
797 get_tv32(struct timeval *o, struct timeval32 __user *i)
798 {
799 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
800 (__get_user(o->tv_sec, &i->tv_sec) |
801 __get_user(o->tv_usec, &i->tv_usec)));
802 }
803
804 static inline long
805 put_tv32(struct timeval32 __user *o, struct timeval *i)
806 {
807 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
808 (__put_user(i->tv_sec, &o->tv_sec) |
809 __put_user(i->tv_usec, &o->tv_usec)));
810 }
811
812 static inline long
813 get_it32(struct itimerval *o, struct itimerval32 __user *i)
814 {
815 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
816 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
817 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
818 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
819 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
820 }
821
822 static inline long
823 put_it32(struct itimerval32 __user *o, struct itimerval *i)
824 {
825 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
826 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
827 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
828 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
829 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
830 }
831
832 static inline void
833 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
834 {
835 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
836 value->tv_sec = jiffies / HZ;
837 }
838
839 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
840 struct timezone __user *, tz)
841 {
842 if (tv) {
843 struct timeval ktv;
844 do_gettimeofday(&ktv);
845 if (put_tv32(tv, &ktv))
846 return -EFAULT;
847 }
848 if (tz) {
849 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
850 return -EFAULT;
851 }
852 return 0;
853 }
854
855 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
856 struct timezone __user *, tz)
857 {
858 struct timespec kts;
859 struct timezone ktz;
860
861 if (tv) {
862 if (get_tv32((struct timeval *)&kts, tv))
863 return -EFAULT;
864 }
865 if (tz) {
866 if (copy_from_user(&ktz, tz, sizeof(*tz)))
867 return -EFAULT;
868 }
869
870 kts.tv_nsec *= 1000;
871
872 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
873 }
874
875 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
876 {
877 struct itimerval kit;
878 int error;
879
880 error = do_getitimer(which, &kit);
881 if (!error && put_it32(it, &kit))
882 error = -EFAULT;
883
884 return error;
885 }
886
887 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
888 struct itimerval32 __user *, out)
889 {
890 struct itimerval kin, kout;
891 int error;
892
893 if (in) {
894 if (get_it32(&kin, in))
895 return -EFAULT;
896 } else
897 memset(&kin, 0, sizeof(kin));
898
899 error = do_setitimer(which, &kin, out ? &kout : NULL);
900 if (error || !out)
901 return error;
902
903 if (put_it32(out, &kout))
904 return -EFAULT;
905
906 return 0;
907
908 }
909
910 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
911 struct timeval32 __user *, tvs)
912 {
913 struct timespec tv[2];
914
915 if (tvs) {
916 struct timeval ktvs[2];
917 if (get_tv32(&ktvs[0], &tvs[0]) ||
918 get_tv32(&ktvs[1], &tvs[1]))
919 return -EFAULT;
920
921 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
922 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
923 return -EINVAL;
924
925 tv[0].tv_sec = ktvs[0].tv_sec;
926 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
927 tv[1].tv_sec = ktvs[1].tv_sec;
928 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
929 }
930
931 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
932 }
933
934 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
935 fd_set __user *, exp, struct timeval32 __user *, tvp)
936 {
937 struct timespec end_time, *to = NULL;
938 if (tvp) {
939 time_t sec, usec;
940
941 to = &end_time;
942
943 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
944 || __get_user(sec, &tvp->tv_sec)
945 || __get_user(usec, &tvp->tv_usec)) {
946 return -EFAULT;
947 }
948
949 if (sec < 0 || usec < 0)
950 return -EINVAL;
951
952 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC))
953 return -EINVAL;
954
955 }
956
957 /* OSF does not copy back the remaining time. */
958 return core_sys_select(n, inp, outp, exp, to);
959 }
960
961 struct rusage32 {
962 struct timeval32 ru_utime; /* user time used */
963 struct timeval32 ru_stime; /* system time used */
964 long ru_maxrss; /* maximum resident set size */
965 long ru_ixrss; /* integral shared memory size */
966 long ru_idrss; /* integral unshared data size */
967 long ru_isrss; /* integral unshared stack size */
968 long ru_minflt; /* page reclaims */
969 long ru_majflt; /* page faults */
970 long ru_nswap; /* swaps */
971 long ru_inblock; /* block input operations */
972 long ru_oublock; /* block output operations */
973 long ru_msgsnd; /* messages sent */
974 long ru_msgrcv; /* messages received */
975 long ru_nsignals; /* signals received */
976 long ru_nvcsw; /* voluntary context switches */
977 long ru_nivcsw; /* involuntary " */
978 };
979
980 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
981 {
982 struct rusage32 r;
983
984 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
985 return -EINVAL;
986
987 memset(&r, 0, sizeof(r));
988 switch (who) {
989 case RUSAGE_SELF:
990 jiffies_to_timeval32(current->utime, &r.ru_utime);
991 jiffies_to_timeval32(current->stime, &r.ru_stime);
992 r.ru_minflt = current->min_flt;
993 r.ru_majflt = current->maj_flt;
994 break;
995 case RUSAGE_CHILDREN:
996 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
997 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
998 r.ru_minflt = current->signal->cmin_flt;
999 r.ru_majflt = current->signal->cmaj_flt;
1000 break;
1001 }
1002
1003 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1004 }
1005
1006 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1007 struct rusage32 __user *, ur)
1008 {
1009 struct rusage r;
1010 long ret, err;
1011 unsigned int status = 0;
1012 mm_segment_t old_fs;
1013
1014 if (!ur)
1015 return sys_wait4(pid, ustatus, options, NULL);
1016
1017 old_fs = get_fs();
1018
1019 set_fs (KERNEL_DS);
1020 ret = sys_wait4(pid, (unsigned int __user *) &status, options,
1021 (struct rusage __user *) &r);
1022 set_fs (old_fs);
1023
1024 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1025 return -EFAULT;
1026
1027 err = 0;
1028 err |= put_user(status, ustatus);
1029 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1030 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1031 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1032 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1033 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1034 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1035 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1036 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1037 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1038 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1039 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1040 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1041 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1042 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1043 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1044 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1045 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1046 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1047
1048 return err ? err : ret;
1049 }
1050
1051 /*
1052 * I don't know what the parameters are: the first one
1053 * seems to be a timeval pointer, and I suspect the second
1054 * one is the time remaining.. Ho humm.. No documentation.
1055 */
1056 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1057 struct timeval32 __user *, remain)
1058 {
1059 struct timeval tmp;
1060 unsigned long ticks;
1061
1062 if (get_tv32(&tmp, sleep))
1063 goto fault;
1064
1065 ticks = timeval_to_jiffies(&tmp);
1066
1067 ticks = schedule_timeout_interruptible(ticks);
1068
1069 if (remain) {
1070 jiffies_to_timeval(ticks, &tmp);
1071 if (put_tv32(remain, &tmp))
1072 goto fault;
1073 }
1074
1075 return 0;
1076 fault:
1077 return -EFAULT;
1078 }
1079
1080
1081 struct timex32 {
1082 unsigned int modes; /* mode selector */
1083 long offset; /* time offset (usec) */
1084 long freq; /* frequency offset (scaled ppm) */
1085 long maxerror; /* maximum error (usec) */
1086 long esterror; /* estimated error (usec) */
1087 int status; /* clock command/status */
1088 long constant; /* pll time constant */
1089 long precision; /* clock precision (usec) (read only) */
1090 long tolerance; /* clock frequency tolerance (ppm)
1091 * (read only)
1092 */
1093 struct timeval32 time; /* (read only) */
1094 long tick; /* (modified) usecs between clock ticks */
1095
1096 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1097 long jitter; /* pps jitter (us) (ro) */
1098 int shift; /* interval duration (s) (shift) (ro) */
1099 long stabil; /* pps stability (scaled ppm) (ro) */
1100 long jitcnt; /* jitter limit exceeded (ro) */
1101 long calcnt; /* calibration intervals (ro) */
1102 long errcnt; /* calibration errors (ro) */
1103 long stbcnt; /* stability limit exceeded (ro) */
1104
1105 int :32; int :32; int :32; int :32;
1106 int :32; int :32; int :32; int :32;
1107 int :32; int :32; int :32; int :32;
1108 };
1109
1110 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1111 {
1112 struct timex txc;
1113 int ret;
1114
1115 /* copy relevant bits of struct timex. */
1116 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1117 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1118 offsetof(struct timex32, time)))
1119 return -EFAULT;
1120
1121 ret = do_adjtimex(&txc);
1122 if (ret < 0)
1123 return ret;
1124
1125 /* copy back to timex32 */
1126 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1127 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1128 offsetof(struct timex32, tick))) ||
1129 (put_tv32(&txc_p->time, &txc.time)))
1130 return -EFAULT;
1131
1132 return ret;
1133 }
1134
1135 /* Get an address range which is currently unmapped. Similar to the
1136 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1137
1138 static unsigned long
1139 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1140 unsigned long limit)
1141 {
1142 struct vm_area_struct *vma = find_vma(current->mm, addr);
1143
1144 while (1) {
1145 /* At this point: (!vma || addr < vma->vm_end). */
1146 if (limit - len < addr)
1147 return -ENOMEM;
1148 if (!vma || addr + len <= vma->vm_start)
1149 return addr;
1150 addr = vma->vm_end;
1151 vma = vma->vm_next;
1152 }
1153 }
1154
1155 unsigned long
1156 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1157 unsigned long len, unsigned long pgoff,
1158 unsigned long flags)
1159 {
1160 unsigned long limit;
1161
1162 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1163 if (current->personality & ADDR_LIMIT_32BIT)
1164 limit = 0x80000000;
1165 else
1166 limit = TASK_SIZE;
1167
1168 if (len > limit)
1169 return -ENOMEM;
1170
1171 if (flags & MAP_FIXED)
1172 return addr;
1173
1174 /* First, see if the given suggestion fits.
1175
1176 The OSF/1 loader (/sbin/loader) relies on us returning an
1177 address larger than the requested if one exists, which is
1178 a terribly broken way to program.
1179
1180 That said, I can see the use in being able to suggest not
1181 merely specific addresses, but regions of memory -- perhaps
1182 this feature should be incorporated into all ports? */
1183
1184 if (addr) {
1185 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1186 if (addr != (unsigned long) -ENOMEM)
1187 return addr;
1188 }
1189
1190 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1191 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1192 len, limit);
1193 if (addr != (unsigned long) -ENOMEM)
1194 return addr;
1195
1196 /* Finally, try allocating in low memory. */
1197 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1198
1199 return addr;
1200 }
1201
1202 #ifdef CONFIG_OSF4_COMPAT
1203
1204 /* Clear top 32 bits of iov_len in the user's buffer for
1205 compatibility with old versions of OSF/1 where iov_len
1206 was defined as int. */
1207 static int
1208 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1209 {
1210 unsigned long i;
1211
1212 for (i = 0 ; i < count ; i++) {
1213 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1214
1215 if (put_user(0, iov_len_high))
1216 return -EFAULT;
1217 }
1218 return 0;
1219 }
1220
1221 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1222 const struct iovec __user *, vector, unsigned long, count)
1223 {
1224 if (unlikely(personality(current->personality) == PER_OSF4))
1225 if (osf_fix_iov_len(vector, count))
1226 return -EFAULT;
1227 return sys_readv(fd, vector, count);
1228 }
1229
1230 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1231 const struct iovec __user *, vector, unsigned long, count)
1232 {
1233 if (unlikely(personality(current->personality) == PER_OSF4))
1234 if (osf_fix_iov_len(vector, count))
1235 return -EFAULT;
1236 return sys_writev(fd, vector, count);
1237 }
1238
1239 #endif
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree