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Merge commit 'v2.6.32.11' into mini2440-stable-v2.6.32
[linux-2.6/mini2440.git] / arch / alpha / kernel / osf_sys.c
blob62619f25132f93018d3a7850dda6c91aee5d0eb2
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 /*
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 = -EINVAL;
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 printk("osf_mount(%ld, %x)\n", typenr, flag);
383 }
384 putname(name);
385 out:
386 return retval;
387 }
388
389 SYSCALL_DEFINE1(osf_utsname, char __user *, name)
390 {
391 int error;
392
393 down_read(&uts_sem);
394 error = -EFAULT;
395 if (copy_to_user(name + 0, utsname()->sysname, 32))
396 goto out;
397 if (copy_to_user(name + 32, utsname()->nodename, 32))
398 goto out;
399 if (copy_to_user(name + 64, utsname()->release, 32))
400 goto out;
401 if (copy_to_user(name + 96, utsname()->version, 32))
402 goto out;
403 if (copy_to_user(name + 128, utsname()->machine, 32))
404 goto out;
405
406 error = 0;
407 out:
408 up_read(&uts_sem);
409 return error;
410 }
411
412 SYSCALL_DEFINE0(getpagesize)
413 {
414 return PAGE_SIZE;
415 }
416
417 SYSCALL_DEFINE0(getdtablesize)
418 {
419 return sysctl_nr_open;
420 }
421
422 /*
423 * For compatibility with OSF/1 only. Use utsname(2) instead.
424 */
425 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
426 {
427 unsigned len;
428 int i;
429
430 if (!access_ok(VERIFY_WRITE, name, namelen))
431 return -EFAULT;
432
433 len = namelen;
434 if (namelen > 32)
435 len = 32;
436
437 down_read(&uts_sem);
438 for (i = 0; i < len; ++i) {
439 __put_user(utsname()->domainname[i], name + i);
440 if (utsname()->domainname[i] == '\0')
441 break;
442 }
443 up_read(&uts_sem);
444
445 return 0;
446 }
447
448 /*
449 * The following stuff should move into a header file should it ever
450 * be labeled "officially supported." Right now, there is just enough
451 * support to avoid applications (such as tar) printing error
452 * messages. The attributes are not really implemented.
453 */
454
455 /*
456 * Values for Property list entry flag
457 */
458 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
459 by default */
460 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
461 #define PLE_FLAG_ALL -1 /* All flag value */
462
463 struct proplistname_args {
464 unsigned int pl_mask;
465 unsigned int pl_numnames;
466 char **pl_names;
467 };
468
469 union pl_args {
470 struct setargs {
471 char __user *path;
472 long follow;
473 long nbytes;
474 char __user *buf;
475 } set;
476 struct fsetargs {
477 long fd;
478 long nbytes;
479 char __user *buf;
480 } fset;
481 struct getargs {
482 char __user *path;
483 long follow;
484 struct proplistname_args __user *name_args;
485 long nbytes;
486 char __user *buf;
487 int __user *min_buf_size;
488 } get;
489 struct fgetargs {
490 long fd;
491 struct proplistname_args __user *name_args;
492 long nbytes;
493 char __user *buf;
494 int __user *min_buf_size;
495 } fget;
496 struct delargs {
497 char __user *path;
498 long follow;
499 struct proplistname_args __user *name_args;
500 } del;
501 struct fdelargs {
502 long fd;
503 struct proplistname_args __user *name_args;
504 } fdel;
505 };
506
507 enum pl_code {
508 PL_SET = 1, PL_FSET = 2,
509 PL_GET = 3, PL_FGET = 4,
510 PL_DEL = 5, PL_FDEL = 6
511 };
512
513 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
514 union pl_args __user *, args)
515 {
516 long error;
517 int __user *min_buf_size_ptr;
518
519 lock_kernel();
520 switch (code) {
521 case PL_SET:
522 if (get_user(error, &args->set.nbytes))
523 error = -EFAULT;
524 break;
525 case PL_FSET:
526 if (get_user(error, &args->fset.nbytes))
527 error = -EFAULT;
528 break;
529 case PL_GET:
530 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
531 if (error)
532 break;
533 error = put_user(0, min_buf_size_ptr);
534 break;
535 case PL_FGET:
536 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
537 if (error)
538 break;
539 error = put_user(0, min_buf_size_ptr);
540 break;
541 case PL_DEL:
542 case PL_FDEL:
543 error = 0;
544 break;
545 default:
546 error = -EOPNOTSUPP;
547 break;
548 };
549 unlock_kernel();
550 return error;
551 }
552
553 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
554 struct sigstack __user *, uoss)
555 {
556 unsigned long usp = rdusp();
557 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
558 unsigned long oss_os = on_sig_stack(usp);
559 int error;
560
561 if (uss) {
562 void __user *ss_sp;
563
564 error = -EFAULT;
565 if (get_user(ss_sp, &uss->ss_sp))
566 goto out;
567
568 /* If the current stack was set with sigaltstack, don't
569 swap stacks while we are on it. */
570 error = -EPERM;
571 if (current->sas_ss_sp && on_sig_stack(usp))
572 goto out;
573
574 /* Since we don't know the extent of the stack, and we don't
575 track onstack-ness, but rather calculate it, we must
576 presume a size. Ho hum this interface is lossy. */
577 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
578 current->sas_ss_size = SIGSTKSZ;
579 }
580
581 if (uoss) {
582 error = -EFAULT;
583 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
584 || __put_user(oss_sp, &uoss->ss_sp)
585 || __put_user(oss_os, &uoss->ss_onstack))
586 goto out;
587 }
588
589 error = 0;
590 out:
591 return error;
592 }
593
594 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
595 {
596 char *sysinfo_table[] = {
597 utsname()->sysname,
598 utsname()->nodename,
599 utsname()->release,
600 utsname()->version,
601 utsname()->machine,
602 "alpha", /* instruction set architecture */
603 "dummy", /* hardware serial number */
604 "dummy", /* hardware manufacturer */
605 "dummy", /* secure RPC domain */
606 };
607 unsigned long offset;
608 char *res;
609 long len, err = -EINVAL;
610
611 offset = command-1;
612 if (offset >= ARRAY_SIZE(sysinfo_table)) {
613 /* Digital UNIX has a few unpublished interfaces here */
614 printk("sysinfo(%d)", command);
615 goto out;
616 }
617
618 down_read(&uts_sem);
619 res = sysinfo_table[offset];
620 len = strlen(res)+1;
621 if (len > count)
622 len = count;
623 if (copy_to_user(buf, res, len))
624 err = -EFAULT;
625 else
626 err = 0;
627 up_read(&uts_sem);
628 out:
629 return err;
630 }
631
632 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
633 unsigned long, nbytes, int __user *, start, void __user *, arg)
634 {
635 unsigned long w;
636 struct percpu_struct *cpu;
637
638 switch (op) {
639 case GSI_IEEE_FP_CONTROL:
640 /* Return current software fp control & status bits. */
641 /* Note that DU doesn't verify available space here. */
642
643 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
644 w = swcr_update_status(w, rdfpcr());
645 if (put_user(w, (unsigned long __user *) buffer))
646 return -EFAULT;
647 return 0;
648
649 case GSI_IEEE_STATE_AT_SIGNAL:
650 /*
651 * Not sure anybody will ever use this weird stuff. These
652 * ops can be used (under OSF/1) to set the fpcr that should
653 * be used when a signal handler starts executing.
654 */
655 break;
656
657 case GSI_UACPROC:
658 if (nbytes < sizeof(unsigned int))
659 return -EINVAL;
660 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK;
661 if (put_user(w, (unsigned int __user *)buffer))
662 return -EFAULT;
663 return 1;
664
665 case GSI_PROC_TYPE:
666 if (nbytes < sizeof(unsigned long))
667 return -EINVAL;
668 cpu = (struct percpu_struct*)
669 ((char*)hwrpb + hwrpb->processor_offset);
670 w = cpu->type;
671 if (put_user(w, (unsigned long __user*)buffer))
672 return -EFAULT;
673 return 1;
674
675 case GSI_GET_HWRPB:
676 if (nbytes < sizeof(*hwrpb))
677 return -EINVAL;
678 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
679 return -EFAULT;
680 return 1;
681
682 default:
683 break;
684 }
685
686 return -EOPNOTSUPP;
687 }
688
689 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
690 unsigned long, nbytes, int __user *, start, void __user *, arg)
691 {
692 switch (op) {
693 case SSI_IEEE_FP_CONTROL: {
694 unsigned long swcr, fpcr;
695 unsigned int *state;
696
697 /*
698 * Alpha Architecture Handbook 4.7.7.3:
699 * To be fully IEEE compiant, we must track the current IEEE
700 * exception state in software, because spurious bits can be
701 * set in the trap shadow of a software-complete insn.
702 */
703
704 if (get_user(swcr, (unsigned long __user *)buffer))
705 return -EFAULT;
706 state = &current_thread_info()->ieee_state;
707
708 /* Update softare trap enable bits. */
709 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
710
711 /* Update the real fpcr. */
712 fpcr = rdfpcr() & FPCR_DYN_MASK;
713 fpcr |= ieee_swcr_to_fpcr(swcr);
714 wrfpcr(fpcr);
715
716 return 0;
717 }
718
719 case SSI_IEEE_RAISE_EXCEPTION: {
720 unsigned long exc, swcr, fpcr, fex;
721 unsigned int *state;
722
723 if (get_user(exc, (unsigned long __user *)buffer))
724 return -EFAULT;
725 state = &current_thread_info()->ieee_state;
726 exc &= IEEE_STATUS_MASK;
727
728 /* Update softare trap enable bits. */
729 swcr = (*state & IEEE_SW_MASK) | exc;
730 *state |= exc;
731
732 /* Update the real fpcr. */
733 fpcr = rdfpcr();
734 fpcr |= ieee_swcr_to_fpcr(swcr);
735 wrfpcr(fpcr);
736
737 /* If any exceptions set by this call, and are unmasked,
738 send a signal. Old exceptions are not signaled. */
739 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
740 if (fex) {
741 siginfo_t info;
742 int si_code = 0;
743
744 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
745 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
746 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
747 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
748 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
749 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
750
751 info.si_signo = SIGFPE;
752 info.si_errno = 0;
753 info.si_code = si_code;
754 info.si_addr = NULL; /* FIXME */
755 send_sig_info(SIGFPE, &info, current);
756 }
757 return 0;
758 }
759
760 case SSI_IEEE_STATE_AT_SIGNAL:
761 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
762 /*
763 * Not sure anybody will ever use this weird stuff. These
764 * ops can be used (under OSF/1) to set the fpcr that should
765 * be used when a signal handler starts executing.
766 */
767 break;
768
769 case SSI_NVPAIRS: {
770 unsigned long v, w, i;
771 unsigned int old, new;
772
773 for (i = 0; i < nbytes; ++i) {
774
775 if (get_user(v, 2*i + (unsigned int __user *)buffer))
776 return -EFAULT;
777 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
778 return -EFAULT;
779 switch (v) {
780 case SSIN_UACPROC:
781 again:
782 old = current_thread_info()->flags;
783 new = old & ~(UAC_BITMASK << UAC_SHIFT);
784 new = new | (w & UAC_BITMASK) << UAC_SHIFT;
785 if (cmpxchg(&current_thread_info()->flags,
786 old, new) != old)
787 goto again;
788 break;
789
790 default:
791 return -EOPNOTSUPP;
792 }
793 }
794 return 0;
795 }
796
797 default:
798 break;
799 }
800
801 return -EOPNOTSUPP;
802 }
803
804 /* Translations due to the fact that OSF's time_t is an int. Which
805 affects all sorts of things, like timeval and itimerval. */
806
807 extern struct timezone sys_tz;
808
809 struct timeval32
810 {
811 int tv_sec, tv_usec;
812 };
813
814 struct itimerval32
815 {
816 struct timeval32 it_interval;
817 struct timeval32 it_value;
818 };
819
820 static inline long
821 get_tv32(struct timeval *o, struct timeval32 __user *i)
822 {
823 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
824 (__get_user(o->tv_sec, &i->tv_sec) |
825 __get_user(o->tv_usec, &i->tv_usec)));
826 }
827
828 static inline long
829 put_tv32(struct timeval32 __user *o, struct timeval *i)
830 {
831 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
832 (__put_user(i->tv_sec, &o->tv_sec) |
833 __put_user(i->tv_usec, &o->tv_usec)));
834 }
835
836 static inline long
837 get_it32(struct itimerval *o, struct itimerval32 __user *i)
838 {
839 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
840 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
841 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
842 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
843 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
844 }
845
846 static inline long
847 put_it32(struct itimerval32 __user *o, struct itimerval *i)
848 {
849 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
850 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
851 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
852 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
853 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
854 }
855
856 static inline void
857 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
858 {
859 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
860 value->tv_sec = jiffies / HZ;
861 }
862
863 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
864 struct timezone __user *, tz)
865 {
866 if (tv) {
867 struct timeval ktv;
868 do_gettimeofday(&ktv);
869 if (put_tv32(tv, &ktv))
870 return -EFAULT;
871 }
872 if (tz) {
873 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
874 return -EFAULT;
875 }
876 return 0;
877 }
878
879 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
880 struct timezone __user *, tz)
881 {
882 struct timespec kts;
883 struct timezone ktz;
884
885 if (tv) {
886 if (get_tv32((struct timeval *)&kts, tv))
887 return -EFAULT;
888 }
889 if (tz) {
890 if (copy_from_user(&ktz, tz, sizeof(*tz)))
891 return -EFAULT;
892 }
893
894 kts.tv_nsec *= 1000;
895
896 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
897 }
898
899 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
900 {
901 struct itimerval kit;
902 int error;
903
904 error = do_getitimer(which, &kit);
905 if (!error && put_it32(it, &kit))
906 error = -EFAULT;
907
908 return error;
909 }
910
911 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
912 struct itimerval32 __user *, out)
913 {
914 struct itimerval kin, kout;
915 int error;
916
917 if (in) {
918 if (get_it32(&kin, in))
919 return -EFAULT;
920 } else
921 memset(&kin, 0, sizeof(kin));
922
923 error = do_setitimer(which, &kin, out ? &kout : NULL);
924 if (error || !out)
925 return error;
926
927 if (put_it32(out, &kout))
928 return -EFAULT;
929
930 return 0;
931
932 }
933
934 SYSCALL_DEFINE2(osf_utimes, char __user *, filename,
935 struct timeval32 __user *, tvs)
936 {
937 struct timespec tv[2];
938
939 if (tvs) {
940 struct timeval ktvs[2];
941 if (get_tv32(&ktvs[0], &tvs[0]) ||
942 get_tv32(&ktvs[1], &tvs[1]))
943 return -EFAULT;
944
945 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
946 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
947 return -EINVAL;
948
949 tv[0].tv_sec = ktvs[0].tv_sec;
950 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
951 tv[1].tv_sec = ktvs[1].tv_sec;
952 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
953 }
954
955 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
956 }
957
958 #define MAX_SELECT_SECONDS \
959 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
960
961 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
962 fd_set __user *, exp, struct timeval32 __user *, tvp)
963 {
964 struct timespec end_time, *to = NULL;
965 if (tvp) {
966 time_t sec, usec;
967
968 to = &end_time;
969
970 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
971 || __get_user(sec, &tvp->tv_sec)
972 || __get_user(usec, &tvp->tv_usec)) {
973 return -EFAULT;
974 }
975
976 if (sec < 0 || usec < 0)
977 return -EINVAL;
978
979 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC))
980 return -EINVAL;
981
982 }
983
984 /* OSF does not copy back the remaining time. */
985 return core_sys_select(n, inp, outp, exp, to);
986 }
987
988 struct rusage32 {
989 struct timeval32 ru_utime; /* user time used */
990 struct timeval32 ru_stime; /* system time used */
991 long ru_maxrss; /* maximum resident set size */
992 long ru_ixrss; /* integral shared memory size */
993 long ru_idrss; /* integral unshared data size */
994 long ru_isrss; /* integral unshared stack size */
995 long ru_minflt; /* page reclaims */
996 long ru_majflt; /* page faults */
997 long ru_nswap; /* swaps */
998 long ru_inblock; /* block input operations */
999 long ru_oublock; /* block output operations */
1000 long ru_msgsnd; /* messages sent */
1001 long ru_msgrcv; /* messages received */
1002 long ru_nsignals; /* signals received */
1003 long ru_nvcsw; /* voluntary context switches */
1004 long ru_nivcsw; /* involuntary " */
1005 };
1006
1007 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1008 {
1009 struct rusage32 r;
1010
1011 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1012 return -EINVAL;
1013
1014 memset(&r, 0, sizeof(r));
1015 switch (who) {
1016 case RUSAGE_SELF:
1017 jiffies_to_timeval32(current->utime, &r.ru_utime);
1018 jiffies_to_timeval32(current->stime, &r.ru_stime);
1019 r.ru_minflt = current->min_flt;
1020 r.ru_majflt = current->maj_flt;
1021 break;
1022 case RUSAGE_CHILDREN:
1023 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1024 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1025 r.ru_minflt = current->signal->cmin_flt;
1026 r.ru_majflt = current->signal->cmaj_flt;
1027 break;
1028 }
1029
1030 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1031 }
1032
1033 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1034 struct rusage32 __user *, ur)
1035 {
1036 struct rusage r;
1037 long ret, err;
1038 mm_segment_t old_fs;
1039
1040 if (!ur)
1041 return sys_wait4(pid, ustatus, options, NULL);
1042
1043 old_fs = get_fs();
1044
1045 set_fs (KERNEL_DS);
1046 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r);
1047 set_fs (old_fs);
1048
1049 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1050 return -EFAULT;
1051
1052 err = 0;
1053 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1054 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1055 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1056 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1057 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1058 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1059 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1060 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1061 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1062 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1063 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1064 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1065 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1066 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1067 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1068 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1069 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1070 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1071
1072 return err ? err : ret;
1073 }
1074
1075 /*
1076 * I don't know what the parameters are: the first one
1077 * seems to be a timeval pointer, and I suspect the second
1078 * one is the time remaining.. Ho humm.. No documentation.
1079 */
1080 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1081 struct timeval32 __user *, remain)
1082 {
1083 struct timeval tmp;
1084 unsigned long ticks;
1085
1086 if (get_tv32(&tmp, sleep))
1087 goto fault;
1088
1089 ticks = timeval_to_jiffies(&tmp);
1090
1091 ticks = schedule_timeout_interruptible(ticks);
1092
1093 if (remain) {
1094 jiffies_to_timeval(ticks, &tmp);
1095 if (put_tv32(remain, &tmp))
1096 goto fault;
1097 }
1098
1099 return 0;
1100 fault:
1101 return -EFAULT;
1102 }
1103
1104
1105 struct timex32 {
1106 unsigned int modes; /* mode selector */
1107 long offset; /* time offset (usec) */
1108 long freq; /* frequency offset (scaled ppm) */
1109 long maxerror; /* maximum error (usec) */
1110 long esterror; /* estimated error (usec) */
1111 int status; /* clock command/status */
1112 long constant; /* pll time constant */
1113 long precision; /* clock precision (usec) (read only) */
1114 long tolerance; /* clock frequency tolerance (ppm)
1115 * (read only)
1116 */
1117 struct timeval32 time; /* (read only) */
1118 long tick; /* (modified) usecs between clock ticks */
1119
1120 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1121 long jitter; /* pps jitter (us) (ro) */
1122 int shift; /* interval duration (s) (shift) (ro) */
1123 long stabil; /* pps stability (scaled ppm) (ro) */
1124 long jitcnt; /* jitter limit exceeded (ro) */
1125 long calcnt; /* calibration intervals (ro) */
1126 long errcnt; /* calibration errors (ro) */
1127 long stbcnt; /* stability limit exceeded (ro) */
1128
1129 int :32; int :32; int :32; int :32;
1130 int :32; int :32; int :32; int :32;
1131 int :32; int :32; int :32; int :32;
1132 };
1133
1134 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1135 {
1136 struct timex txc;
1137 int ret;
1138
1139 /* copy relevant bits of struct timex. */
1140 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1141 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1142 offsetof(struct timex32, time)))
1143 return -EFAULT;
1144
1145 ret = do_adjtimex(&txc);
1146 if (ret < 0)
1147 return ret;
1148
1149 /* copy back to timex32 */
1150 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1151 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1152 offsetof(struct timex32, tick))) ||
1153 (put_tv32(&txc_p->time, &txc.time)))
1154 return -EFAULT;
1155
1156 return ret;
1157 }
1158
1159 /* Get an address range which is currently unmapped. Similar to the
1160 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1161
1162 static unsigned long
1163 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1164 unsigned long limit)
1165 {
1166 struct vm_area_struct *vma = find_vma(current->mm, addr);
1167
1168 while (1) {
1169 /* At this point: (!vma || addr < vma->vm_end). */
1170 if (limit - len < addr)
1171 return -ENOMEM;
1172 if (!vma || addr + len <= vma->vm_start)
1173 return addr;
1174 addr = vma->vm_end;
1175 vma = vma->vm_next;
1176 }
1177 }
1178
1179 unsigned long
1180 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1181 unsigned long len, unsigned long pgoff,
1182 unsigned long flags)
1183 {
1184 unsigned long limit;
1185
1186 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1187 if (current->personality & ADDR_LIMIT_32BIT)
1188 limit = 0x80000000;
1189 else
1190 limit = TASK_SIZE;
1191
1192 if (len > limit)
1193 return -ENOMEM;
1194
1195 if (flags & MAP_FIXED)
1196 return addr;
1197
1198 /* First, see if the given suggestion fits.
1199
1200 The OSF/1 loader (/sbin/loader) relies on us returning an
1201 address larger than the requested if one exists, which is
1202 a terribly broken way to program.
1203
1204 That said, I can see the use in being able to suggest not
1205 merely specific addresses, but regions of memory -- perhaps
1206 this feature should be incorporated into all ports? */
1207
1208 if (addr) {
1209 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1210 if (addr != (unsigned long) -ENOMEM)
1211 return addr;
1212 }
1213
1214 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1215 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1216 len, limit);
1217 if (addr != (unsigned long) -ENOMEM)
1218 return addr;
1219
1220 /* Finally, try allocating in low memory. */
1221 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1222
1223 return addr;
1224 }
1225
1226 #ifdef CONFIG_OSF4_COMPAT
1227
1228 /* Clear top 32 bits of iov_len in the user's buffer for
1229 compatibility with old versions of OSF/1 where iov_len
1230 was defined as int. */
1231 static int
1232 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1233 {
1234 unsigned long i;
1235
1236 for (i = 0 ; i < count ; i++) {
1237 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1238
1239 if (put_user(0, iov_len_high))
1240 return -EFAULT;
1241 }
1242 return 0;
1243 }
1244
1245 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1246 const struct iovec __user *, vector, unsigned long, count)
1247 {
1248 if (unlikely(personality(current->personality) == PER_OSF4))
1249 if (osf_fix_iov_len(vector, count))
1250 return -EFAULT;
1251 return sys_readv(fd, vector, count);
1252 }
1253
1254 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1255 const struct iovec __user *, vector, unsigned long, count)
1256 {
1257 if (unlikely(personality(current->personality) == PER_OSF4))
1258 if (osf_fix_iov_len(vector, count))
1259 return -EFAULT;
1260 return sys_writev(fd, vector, count);
1261 }
1262
1263 #endif
Support for the Chinese Samsung S3C2440 based development boards