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Linux 2.6.21
[linux/fpc-iii.git] / arch / alpha / kernel / osf_sys.c
blobbe133f1f75a4d117d71544ba1536298051472d7d
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/a.out.h>
26 #include <linux/utsname.h>
27 #include <linux/time.h>
28 #include <linux/timex.h>
29 #include <linux/major.h>
30 #include <linux/stat.h>
31 #include <linux/mman.h>
32 #include <linux/shm.h>
33 #include <linux/poll.h>
34 #include <linux/file.h>
35 #include <linux/types.h>
36 #include <linux/ipc.h>
37 #include <linux/namei.h>
38 #include <linux/uio.h>
39 #include <linux/vfs.h>
40 #include <linux/rcupdate.h>
41
42 #include <asm/fpu.h>
43 #include <asm/io.h>
44 #include <asm/uaccess.h>
45 #include <asm/system.h>
46 #include <asm/sysinfo.h>
47 #include <asm/hwrpb.h>
48 #include <asm/processor.h>
49
50 extern int do_pipe(int *);
51
52 /*
53 * Brk needs to return an error. Still support Linux's brk(0) query idiom,
54 * which OSF programs just shouldn't be doing. We're still not quite
55 * identical to OSF as we don't return 0 on success, but doing otherwise
56 * would require changes to libc. Hopefully this is good enough.
57 */
58 asmlinkage unsigned long
59 osf_brk(unsigned long brk)
60 {
61 unsigned long retval = sys_brk(brk);
62 if (brk && brk != retval)
63 retval = -ENOMEM;
64 return retval;
65 }
66
67 /*
68 * This is pure guess-work..
69 */
70 asmlinkage int
71 osf_set_program_attributes(unsigned long text_start, unsigned long text_len,
72 unsigned long bss_start, unsigned long bss_len)
73 {
74 struct mm_struct *mm;
75
76 lock_kernel();
77 mm = current->mm;
78 mm->end_code = bss_start + bss_len;
79 mm->brk = bss_start + bss_len;
80 #if 0
81 printk("set_program_attributes(%lx %lx %lx %lx)\n",
82 text_start, text_len, bss_start, bss_len);
83 #endif
84 unlock_kernel();
85 return 0;
86 }
87
88 /*
89 * OSF/1 directory handling functions...
90 *
91 * The "getdents()" interface is much more sane: the "basep" stuff is
92 * braindamage (it can't really handle filesystems where the directory
93 * offset differences aren't the same as "d_reclen").
94 */
95 #define NAME_OFFSET offsetof (struct osf_dirent, d_name)
96 #define ROUND_UP(x) (((x)+3) & ~3)
97
98 struct osf_dirent {
99 unsigned int d_ino;
100 unsigned short d_reclen;
101 unsigned short d_namlen;
102 char d_name[1];
103 };
104
105 struct osf_dirent_callback {
106 struct osf_dirent __user *dirent;
107 long __user *basep;
108 unsigned int count;
109 int error;
110 };
111
112 static int
113 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset,
114 u64 ino, unsigned int d_type)
115 {
116 struct osf_dirent __user *dirent;
117 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf;
118 unsigned int reclen = ROUND_UP(NAME_OFFSET + namlen + 1);
119 unsigned int d_ino;
120
121 buf->error = -EINVAL; /* only used if we fail */
122 if (reclen > buf->count)
123 return -EINVAL;
124 d_ino = ino;
125 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
126 return -EOVERFLOW;
127 if (buf->basep) {
128 if (put_user(offset, buf->basep))
129 return -EFAULT;
130 buf->basep = NULL;
131 }
132 dirent = buf->dirent;
133 put_user(d_ino, &dirent->d_ino);
134 put_user(namlen, &dirent->d_namlen);
135 put_user(reclen, &dirent->d_reclen);
136 if (copy_to_user(dirent->d_name, name, namlen) ||
137 put_user(0, dirent->d_name + namlen))
138 return -EFAULT;
139 dirent = (void __user *)dirent + reclen;
140 buf->dirent = dirent;
141 buf->count -= reclen;
142 return 0;
143 }
144
145 asmlinkage int
146 osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent,
147 unsigned int count, long __user *basep)
148 {
149 int error;
150 struct file *file;
151 struct osf_dirent_callback buf;
152
153 error = -EBADF;
154 file = fget(fd);
155 if (!file)
156 goto out;
157
158 buf.dirent = dirent;
159 buf.basep = basep;
160 buf.count = count;
161 buf.error = 0;
162
163 error = vfs_readdir(file, osf_filldir, &buf);
164 if (error < 0)
165 goto out_putf;
166
167 error = buf.error;
168 if (count != buf.count)
169 error = count - buf.count;
170
171 out_putf:
172 fput(file);
173 out:
174 return error;
175 }
176
177 #undef ROUND_UP
178 #undef NAME_OFFSET
179
180 asmlinkage unsigned long
181 osf_mmap(unsigned long addr, unsigned long len, unsigned long prot,
182 unsigned long flags, unsigned long fd, unsigned long off)
183 {
184 struct file *file = NULL;
185 unsigned long ret = -EBADF;
186
187 #if 0
188 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
189 printk("%s: unimplemented OSF mmap flags %04lx\n",
190 current->comm, flags);
191 #endif
192 if (!(flags & MAP_ANONYMOUS)) {
193 file = fget(fd);
194 if (!file)
195 goto out;
196 }
197 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
198 down_write(&current->mm->mmap_sem);
199 ret = do_mmap(file, addr, len, prot, flags, off);
200 up_write(&current->mm->mmap_sem);
201 if (file)
202 fput(file);
203 out:
204 return ret;
205 }
206
207
208 /*
209 * The OSF/1 statfs structure is much larger, but this should
210 * match the beginning, at least.
211 */
212 struct osf_statfs {
213 short f_type;
214 short f_flags;
215 int f_fsize;
216 int f_bsize;
217 int f_blocks;
218 int f_bfree;
219 int f_bavail;
220 int f_files;
221 int f_ffree;
222 __kernel_fsid_t f_fsid;
223 };
224
225 static int
226 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
227 unsigned long bufsiz)
228 {
229 struct osf_statfs tmp_stat;
230
231 tmp_stat.f_type = linux_stat->f_type;
232 tmp_stat.f_flags = 0; /* mount flags */
233 tmp_stat.f_fsize = linux_stat->f_frsize;
234 tmp_stat.f_bsize = linux_stat->f_bsize;
235 tmp_stat.f_blocks = linux_stat->f_blocks;
236 tmp_stat.f_bfree = linux_stat->f_bfree;
237 tmp_stat.f_bavail = linux_stat->f_bavail;
238 tmp_stat.f_files = linux_stat->f_files;
239 tmp_stat.f_ffree = linux_stat->f_ffree;
240 tmp_stat.f_fsid = linux_stat->f_fsid;
241 if (bufsiz > sizeof(tmp_stat))
242 bufsiz = sizeof(tmp_stat);
243 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
244 }
245
246 static int
247 do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer,
248 unsigned long bufsiz)
249 {
250 struct kstatfs linux_stat;
251 int error = vfs_statfs(dentry, &linux_stat);
252 if (!error)
253 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
254 return error;
255 }
256
257 asmlinkage int
258 osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bufsiz)
259 {
260 struct nameidata nd;
261 int retval;
262
263 retval = user_path_walk(path, &nd);
264 if (!retval) {
265 retval = do_osf_statfs(nd.dentry, buffer, bufsiz);
266 path_release(&nd);
267 }
268 return retval;
269 }
270
271 asmlinkage int
272 osf_fstatfs(unsigned long fd, struct osf_statfs __user *buffer, unsigned long bufsiz)
273 {
274 struct file *file;
275 int retval;
276
277 retval = -EBADF;
278 file = fget(fd);
279 if (file) {
280 retval = do_osf_statfs(file->f_path.dentry, buffer, bufsiz);
281 fput(file);
282 }
283 return retval;
284 }
285
286 /*
287 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
288 *
289 * Although to be frank, neither are the native Linux/i386 ones..
290 */
291 struct ufs_args {
292 char __user *devname;
293 int flags;
294 uid_t exroot;
295 };
296
297 struct cdfs_args {
298 char __user *devname;
299 int flags;
300 uid_t exroot;
301
302 /* This has lots more here, which Linux handles with the option block
303 but I'm too lazy to do the translation into ASCII. */
304 };
305
306 struct procfs_args {
307 char __user *devname;
308 int flags;
309 uid_t exroot;
310 };
311
312 /*
313 * We can't actually handle ufs yet, so we translate UFS mounts to
314 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
315 * layout is so braindead it's a major headache doing it.
316 *
317 * Just how long ago was it written? OTOH our UFS driver may be still
318 * unhappy with OSF UFS. [CHECKME]
319 */
320 static int
321 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
322 {
323 int retval;
324 struct cdfs_args tmp;
325 char *devname;
326
327 retval = -EFAULT;
328 if (copy_from_user(&tmp, args, sizeof(tmp)))
329 goto out;
330 devname = getname(tmp.devname);
331 retval = PTR_ERR(devname);
332 if (IS_ERR(devname))
333 goto out;
334 retval = do_mount(devname, dirname, "ext2", flags, NULL);
335 putname(devname);
336 out:
337 return retval;
338 }
339
340 static int
341 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
342 {
343 int retval;
344 struct cdfs_args tmp;
345 char *devname;
346
347 retval = -EFAULT;
348 if (copy_from_user(&tmp, args, sizeof(tmp)))
349 goto out;
350 devname = getname(tmp.devname);
351 retval = PTR_ERR(devname);
352 if (IS_ERR(devname))
353 goto out;
354 retval = do_mount(devname, dirname, "iso9660", flags, NULL);
355 putname(devname);
356 out:
357 return retval;
358 }
359
360 static int
361 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags)
362 {
363 struct procfs_args tmp;
364
365 if (copy_from_user(&tmp, args, sizeof(tmp)))
366 return -EFAULT;
367
368 return do_mount("", dirname, "proc", flags, NULL);
369 }
370
371 asmlinkage int
372 osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data)
373 {
374 int retval = -EINVAL;
375 char *name;
376
377 lock_kernel();
378
379 name = getname(path);
380 retval = PTR_ERR(name);
381 if (IS_ERR(name))
382 goto out;
383 switch (typenr) {
384 case 1:
385 retval = osf_ufs_mount(name, data, flag);
386 break;
387 case 6:
388 retval = osf_cdfs_mount(name, data, flag);
389 break;
390 case 9:
391 retval = osf_procfs_mount(name, data, flag);
392 break;
393 default:
394 printk("osf_mount(%ld, %x)\n", typenr, flag);
395 }
396 putname(name);
397 out:
398 unlock_kernel();
399 return retval;
400 }
401
402 asmlinkage int
403 osf_utsname(char __user *name)
404 {
405 int error;
406
407 down_read(&uts_sem);
408 error = -EFAULT;
409 if (copy_to_user(name + 0, utsname()->sysname, 32))
410 goto out;
411 if (copy_to_user(name + 32, utsname()->nodename, 32))
412 goto out;
413 if (copy_to_user(name + 64, utsname()->release, 32))
414 goto out;
415 if (copy_to_user(name + 96, utsname()->version, 32))
416 goto out;
417 if (copy_to_user(name + 128, utsname()->machine, 32))
418 goto out;
419
420 error = 0;
421 out:
422 up_read(&uts_sem);
423 return error;
424 }
425
426 asmlinkage unsigned long
427 sys_getpagesize(void)
428 {
429 return PAGE_SIZE;
430 }
431
432 asmlinkage unsigned long
433 sys_getdtablesize(void)
434 {
435 return NR_OPEN;
436 }
437
438 /*
439 * For compatibility with OSF/1 only. Use utsname(2) instead.
440 */
441 asmlinkage int
442 osf_getdomainname(char __user *name, int namelen)
443 {
444 unsigned len;
445 int i;
446
447 if (!access_ok(VERIFY_WRITE, name, namelen))
448 return -EFAULT;
449
450 len = namelen;
451 if (namelen > 32)
452 len = 32;
453
454 down_read(&uts_sem);
455 for (i = 0; i < len; ++i) {
456 __put_user(utsname()->domainname[i], name + i);
457 if (utsname()->domainname[i] == '\0')
458 break;
459 }
460 up_read(&uts_sem);
461
462 return 0;
463 }
464
465 /*
466 * The following stuff should move into a header file should it ever
467 * be labeled "officially supported." Right now, there is just enough
468 * support to avoid applications (such as tar) printing error
469 * messages. The attributes are not really implemented.
470 */
471
472 /*
473 * Values for Property list entry flag
474 */
475 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
476 by default */
477 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
478 #define PLE_FLAG_ALL -1 /* All flag value */
479
480 struct proplistname_args {
481 unsigned int pl_mask;
482 unsigned int pl_numnames;
483 char **pl_names;
484 };
485
486 union pl_args {
487 struct setargs {
488 char __user *path;
489 long follow;
490 long nbytes;
491 char __user *buf;
492 } set;
493 struct fsetargs {
494 long fd;
495 long nbytes;
496 char __user *buf;
497 } fset;
498 struct getargs {
499 char __user *path;
500 long follow;
501 struct proplistname_args __user *name_args;
502 long nbytes;
503 char __user *buf;
504 int __user *min_buf_size;
505 } get;
506 struct fgetargs {
507 long fd;
508 struct proplistname_args __user *name_args;
509 long nbytes;
510 char __user *buf;
511 int __user *min_buf_size;
512 } fget;
513 struct delargs {
514 char __user *path;
515 long follow;
516 struct proplistname_args __user *name_args;
517 } del;
518 struct fdelargs {
519 long fd;
520 struct proplistname_args __user *name_args;
521 } fdel;
522 };
523
524 enum pl_code {
525 PL_SET = 1, PL_FSET = 2,
526 PL_GET = 3, PL_FGET = 4,
527 PL_DEL = 5, PL_FDEL = 6
528 };
529
530 asmlinkage long
531 osf_proplist_syscall(enum pl_code code, union pl_args __user *args)
532 {
533 long error;
534 int __user *min_buf_size_ptr;
535
536 lock_kernel();
537 switch (code) {
538 case PL_SET:
539 if (get_user(error, &args->set.nbytes))
540 error = -EFAULT;
541 break;
542 case PL_FSET:
543 if (get_user(error, &args->fset.nbytes))
544 error = -EFAULT;
545 break;
546 case PL_GET:
547 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
548 if (error)
549 break;
550 error = put_user(0, min_buf_size_ptr);
551 break;
552 case PL_FGET:
553 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
554 if (error)
555 break;
556 error = put_user(0, min_buf_size_ptr);
557 break;
558 case PL_DEL:
559 case PL_FDEL:
560 error = 0;
561 break;
562 default:
563 error = -EOPNOTSUPP;
564 break;
565 };
566 unlock_kernel();
567 return error;
568 }
569
570 asmlinkage int
571 osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss)
572 {
573 unsigned long usp = rdusp();
574 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
575 unsigned long oss_os = on_sig_stack(usp);
576 int error;
577
578 if (uss) {
579 void __user *ss_sp;
580
581 error = -EFAULT;
582 if (get_user(ss_sp, &uss->ss_sp))
583 goto out;
584
585 /* If the current stack was set with sigaltstack, don't
586 swap stacks while we are on it. */
587 error = -EPERM;
588 if (current->sas_ss_sp && on_sig_stack(usp))
589 goto out;
590
591 /* Since we don't know the extent of the stack, and we don't
592 track onstack-ness, but rather calculate it, we must
593 presume a size. Ho hum this interface is lossy. */
594 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
595 current->sas_ss_size = SIGSTKSZ;
596 }
597
598 if (uoss) {
599 error = -EFAULT;
600 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
601 || __put_user(oss_sp, &uoss->ss_sp)
602 || __put_user(oss_os, &uoss->ss_onstack))
603 goto out;
604 }
605
606 error = 0;
607 out:
608 return error;
609 }
610
611 asmlinkage long
612 osf_sysinfo(int command, char __user *buf, long count)
613 {
614 char *sysinfo_table[] = {
615 utsname()->sysname,
616 utsname()->nodename,
617 utsname()->release,
618 utsname()->version,
619 utsname()->machine,
620 "alpha", /* instruction set architecture */
621 "dummy", /* hardware serial number */
622 "dummy", /* hardware manufacturer */
623 "dummy", /* secure RPC domain */
624 };
625 unsigned long offset;
626 char *res;
627 long len, err = -EINVAL;
628
629 offset = command-1;
630 if (offset >= ARRAY_SIZE(sysinfo_table)) {
631 /* Digital UNIX has a few unpublished interfaces here */
632 printk("sysinfo(%d)", command);
633 goto out;
634 }
635
636 down_read(&uts_sem);
637 res = sysinfo_table[offset];
638 len = strlen(res)+1;
639 if (len > count)
640 len = count;
641 if (copy_to_user(buf, res, len))
642 err = -EFAULT;
643 else
644 err = 0;
645 up_read(&uts_sem);
646 out:
647 return err;
648 }
649
650 asmlinkage unsigned long
651 osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes,
652 int __user *start, void __user *arg)
653 {
654 unsigned long w;
655 struct percpu_struct *cpu;
656
657 switch (op) {
658 case GSI_IEEE_FP_CONTROL:
659 /* Return current software fp control & status bits. */
660 /* Note that DU doesn't verify available space here. */
661
662 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
663 w = swcr_update_status(w, rdfpcr());
664 if (put_user(w, (unsigned long __user *) buffer))
665 return -EFAULT;
666 return 0;
667
668 case GSI_IEEE_STATE_AT_SIGNAL:
669 /*
670 * Not sure anybody will ever use this weird stuff. These
671 * ops can be used (under OSF/1) to set the fpcr that should
672 * be used when a signal handler starts executing.
673 */
674 break;
675
676 case GSI_UACPROC:
677 if (nbytes < sizeof(unsigned int))
678 return -EINVAL;
679 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK;
680 if (put_user(w, (unsigned int __user *)buffer))
681 return -EFAULT;
682 return 1;
683
684 case GSI_PROC_TYPE:
685 if (nbytes < sizeof(unsigned long))
686 return -EINVAL;
687 cpu = (struct percpu_struct*)
688 ((char*)hwrpb + hwrpb->processor_offset);
689 w = cpu->type;
690 if (put_user(w, (unsigned long __user*)buffer))
691 return -EFAULT;
692 return 1;
693
694 case GSI_GET_HWRPB:
695 if (nbytes < sizeof(*hwrpb))
696 return -EINVAL;
697 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
698 return -EFAULT;
699 return 1;
700
701 default:
702 break;
703 }
704
705 return -EOPNOTSUPP;
706 }
707
708 asmlinkage unsigned long
709 osf_setsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes,
710 int __user *start, void __user *arg)
711 {
712 switch (op) {
713 case SSI_IEEE_FP_CONTROL: {
714 unsigned long swcr, fpcr;
715 unsigned int *state;
716
717 /*
718 * Alpha Architecture Handbook 4.7.7.3:
719 * To be fully IEEE compiant, we must track the current IEEE
720 * exception state in software, because spurrious bits can be
721 * set in the trap shadow of a software-complete insn.
722 */
723
724 if (get_user(swcr, (unsigned long __user *)buffer))
725 return -EFAULT;
726 state = &current_thread_info()->ieee_state;
727
728 /* Update softare trap enable bits. */
729 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
730
731 /* Update the real fpcr. */
732 fpcr = rdfpcr() & FPCR_DYN_MASK;
733 fpcr |= ieee_swcr_to_fpcr(swcr);
734 wrfpcr(fpcr);
735
736 return 0;
737 }
738
739 case SSI_IEEE_RAISE_EXCEPTION: {
740 unsigned long exc, swcr, fpcr, fex;
741 unsigned int *state;
742
743 if (get_user(exc, (unsigned long __user *)buffer))
744 return -EFAULT;
745 state = &current_thread_info()->ieee_state;
746 exc &= IEEE_STATUS_MASK;
747
748 /* Update softare trap enable bits. */
749 swcr = (*state & IEEE_SW_MASK) | exc;
750 *state |= exc;
751
752 /* Update the real fpcr. */
753 fpcr = rdfpcr();
754 fpcr |= ieee_swcr_to_fpcr(swcr);
755 wrfpcr(fpcr);
756
757 /* If any exceptions set by this call, and are unmasked,
758 send a signal. Old exceptions are not signaled. */
759 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
760 if (fex) {
761 siginfo_t info;
762 int si_code = 0;
763
764 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
765 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
766 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
767 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
768 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
769 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
770
771 info.si_signo = SIGFPE;
772 info.si_errno = 0;
773 info.si_code = si_code;
774 info.si_addr = NULL; /* FIXME */
775 send_sig_info(SIGFPE, &info, current);
776 }
777 return 0;
778 }
779
780 case SSI_IEEE_STATE_AT_SIGNAL:
781 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
782 /*
783 * Not sure anybody will ever use this weird stuff. These
784 * ops can be used (under OSF/1) to set the fpcr that should
785 * be used when a signal handler starts executing.
786 */
787 break;
788
789 case SSI_NVPAIRS: {
790 unsigned long v, w, i;
791 unsigned int old, new;
792
793 for (i = 0; i < nbytes; ++i) {
794
795 if (get_user(v, 2*i + (unsigned int __user *)buffer))
796 return -EFAULT;
797 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
798 return -EFAULT;
799 switch (v) {
800 case SSIN_UACPROC:
801 again:
802 old = current_thread_info()->flags;
803 new = old & ~(UAC_BITMASK << UAC_SHIFT);
804 new = new | (w & UAC_BITMASK) << UAC_SHIFT;
805 if (cmpxchg(&current_thread_info()->flags,
806 old, new) != old)
807 goto again;
808 break;
809
810 default:
811 return -EOPNOTSUPP;
812 }
813 }
814 return 0;
815 }
816
817 default:
818 break;
819 }
820
821 return -EOPNOTSUPP;
822 }
823
824 /* Translations due to the fact that OSF's time_t is an int. Which
825 affects all sorts of things, like timeval and itimerval. */
826
827 extern struct timezone sys_tz;
828
829 struct timeval32
830 {
831 int tv_sec, tv_usec;
832 };
833
834 struct itimerval32
835 {
836 struct timeval32 it_interval;
837 struct timeval32 it_value;
838 };
839
840 static inline long
841 get_tv32(struct timeval *o, struct timeval32 __user *i)
842 {
843 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
844 (__get_user(o->tv_sec, &i->tv_sec) |
845 __get_user(o->tv_usec, &i->tv_usec)));
846 }
847
848 static inline long
849 put_tv32(struct timeval32 __user *o, struct timeval *i)
850 {
851 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
852 (__put_user(i->tv_sec, &o->tv_sec) |
853 __put_user(i->tv_usec, &o->tv_usec)));
854 }
855
856 static inline long
857 get_it32(struct itimerval *o, struct itimerval32 __user *i)
858 {
859 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
860 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
861 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
862 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
863 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
864 }
865
866 static inline long
867 put_it32(struct itimerval32 __user *o, struct itimerval *i)
868 {
869 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
870 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
871 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
872 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
873 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
874 }
875
876 static inline void
877 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
878 {
879 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
880 value->tv_sec = jiffies / HZ;
881 }
882
883 asmlinkage int
884 osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
885 {
886 if (tv) {
887 struct timeval ktv;
888 do_gettimeofday(&ktv);
889 if (put_tv32(tv, &ktv))
890 return -EFAULT;
891 }
892 if (tz) {
893 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
894 return -EFAULT;
895 }
896 return 0;
897 }
898
899 asmlinkage int
900 osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
901 {
902 struct timespec kts;
903 struct timezone ktz;
904
905 if (tv) {
906 if (get_tv32((struct timeval *)&kts, tv))
907 return -EFAULT;
908 }
909 if (tz) {
910 if (copy_from_user(&ktz, tz, sizeof(*tz)))
911 return -EFAULT;
912 }
913
914 kts.tv_nsec *= 1000;
915
916 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
917 }
918
919 asmlinkage int
920 osf_getitimer(int which, struct itimerval32 __user *it)
921 {
922 struct itimerval kit;
923 int error;
924
925 error = do_getitimer(which, &kit);
926 if (!error && put_it32(it, &kit))
927 error = -EFAULT;
928
929 return error;
930 }
931
932 asmlinkage int
933 osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __user *out)
934 {
935 struct itimerval kin, kout;
936 int error;
937
938 if (in) {
939 if (get_it32(&kin, in))
940 return -EFAULT;
941 } else
942 memset(&kin, 0, sizeof(kin));
943
944 error = do_setitimer(which, &kin, out ? &kout : NULL);
945 if (error || !out)
946 return error;
947
948 if (put_it32(out, &kout))
949 return -EFAULT;
950
951 return 0;
952
953 }
954
955 asmlinkage int
956 osf_utimes(char __user *filename, struct timeval32 __user *tvs)
957 {
958 struct timeval ktvs[2];
959
960 if (tvs) {
961 if (get_tv32(&ktvs[0], &tvs[0]) ||
962 get_tv32(&ktvs[1], &tvs[1]))
963 return -EFAULT;
964 }
965
966 return do_utimes(AT_FDCWD, filename, tvs ? ktvs : NULL);
967 }
968
969 #define MAX_SELECT_SECONDS \
970 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
971
972 asmlinkage int
973 osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
974 struct timeval32 __user *tvp)
975 {
976 fd_set_bits fds;
977 char *bits;
978 size_t size;
979 long timeout;
980 int ret = -EINVAL;
981 struct fdtable *fdt;
982 int max_fds;
983
984 timeout = MAX_SCHEDULE_TIMEOUT;
985 if (tvp) {
986 time_t sec, usec;
987
988 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
989 || __get_user(sec, &tvp->tv_sec)
990 || __get_user(usec, &tvp->tv_usec)) {
991 ret = -EFAULT;
992 goto out_nofds;
993 }
994
995 if (sec < 0 || usec < 0)
996 goto out_nofds;
997
998 if ((unsigned long) sec < MAX_SELECT_SECONDS) {
999 timeout = (usec + 1000000/HZ - 1) / (1000000/HZ);
1000 timeout += sec * (unsigned long) HZ;
1001 }
1002 }
1003
1004 rcu_read_lock();
1005 fdt = files_fdtable(current->files);
1006 max_fds = fdt->max_fds;
1007 rcu_read_unlock();
1008 if (n < 0 || n > max_fds)
1009 goto out_nofds;
1010
1011 /*
1012 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1013 * since we used fdset we need to allocate memory in units of
1014 * long-words.
1015 */
1016 ret = -ENOMEM;
1017 size = FDS_BYTES(n);
1018 bits = kmalloc(6 * size, GFP_KERNEL);
1019 if (!bits)
1020 goto out_nofds;
1021 fds.in = (unsigned long *) bits;
1022 fds.out = (unsigned long *) (bits + size);
1023 fds.ex = (unsigned long *) (bits + 2*size);
1024 fds.res_in = (unsigned long *) (bits + 3*size);
1025 fds.res_out = (unsigned long *) (bits + 4*size);
1026 fds.res_ex = (unsigned long *) (bits + 5*size);
1027
1028 if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) ||
1029 (ret = get_fd_set(n, outp->fds_bits, fds.out)) ||
1030 (ret = get_fd_set(n, exp->fds_bits, fds.ex)))
1031 goto out;
1032 zero_fd_set(n, fds.res_in);
1033 zero_fd_set(n, fds.res_out);
1034 zero_fd_set(n, fds.res_ex);
1035
1036 ret = do_select(n, &fds, &timeout);
1037
1038 /* OSF does not copy back the remaining time. */
1039
1040 if (ret < 0)
1041 goto out;
1042 if (!ret) {
1043 ret = -ERESTARTNOHAND;
1044 if (signal_pending(current))
1045 goto out;
1046 ret = 0;
1047 }
1048
1049 if (set_fd_set(n, inp->fds_bits, fds.res_in) ||
1050 set_fd_set(n, outp->fds_bits, fds.res_out) ||
1051 set_fd_set(n, exp->fds_bits, fds.res_ex))
1052 ret = -EFAULT;
1053
1054 out:
1055 kfree(bits);
1056 out_nofds:
1057 return ret;
1058 }
1059
1060 struct rusage32 {
1061 struct timeval32 ru_utime; /* user time used */
1062 struct timeval32 ru_stime; /* system time used */
1063 long ru_maxrss; /* maximum resident set size */
1064 long ru_ixrss; /* integral shared memory size */
1065 long ru_idrss; /* integral unshared data size */
1066 long ru_isrss; /* integral unshared stack size */
1067 long ru_minflt; /* page reclaims */
1068 long ru_majflt; /* page faults */
1069 long ru_nswap; /* swaps */
1070 long ru_inblock; /* block input operations */
1071 long ru_oublock; /* block output operations */
1072 long ru_msgsnd; /* messages sent */
1073 long ru_msgrcv; /* messages received */
1074 long ru_nsignals; /* signals received */
1075 long ru_nvcsw; /* voluntary context switches */
1076 long ru_nivcsw; /* involuntary " */
1077 };
1078
1079 asmlinkage int
1080 osf_getrusage(int who, struct rusage32 __user *ru)
1081 {
1082 struct rusage32 r;
1083
1084 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1085 return -EINVAL;
1086
1087 memset(&r, 0, sizeof(r));
1088 switch (who) {
1089 case RUSAGE_SELF:
1090 jiffies_to_timeval32(current->utime, &r.ru_utime);
1091 jiffies_to_timeval32(current->stime, &r.ru_stime);
1092 r.ru_minflt = current->min_flt;
1093 r.ru_majflt = current->maj_flt;
1094 break;
1095 case RUSAGE_CHILDREN:
1096 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1097 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1098 r.ru_minflt = current->signal->cmin_flt;
1099 r.ru_majflt = current->signal->cmaj_flt;
1100 break;
1101 }
1102
1103 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1104 }
1105
1106 asmlinkage long
1107 osf_wait4(pid_t pid, int __user *ustatus, int options,
1108 struct rusage32 __user *ur)
1109 {
1110 struct rusage r;
1111 long ret, err;
1112 mm_segment_t old_fs;
1113
1114 if (!ur)
1115 return sys_wait4(pid, ustatus, options, NULL);
1116
1117 old_fs = get_fs();
1118
1119 set_fs (KERNEL_DS);
1120 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r);
1121 set_fs (old_fs);
1122
1123 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1124 return -EFAULT;
1125
1126 err = 0;
1127 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1128 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1129 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1130 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1131 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1132 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1133 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1134 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1135 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1136 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1137 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1138 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1139 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1140 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1141 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1142 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1143 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1144 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1145
1146 return err ? err : ret;
1147 }
1148
1149 /*
1150 * I don't know what the parameters are: the first one
1151 * seems to be a timeval pointer, and I suspect the second
1152 * one is the time remaining.. Ho humm.. No documentation.
1153 */
1154 asmlinkage int
1155 osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain)
1156 {
1157 struct timeval tmp;
1158 unsigned long ticks;
1159
1160 if (get_tv32(&tmp, sleep))
1161 goto fault;
1162
1163 ticks = timeval_to_jiffies(&tmp);
1164
1165 ticks = schedule_timeout_interruptible(ticks);
1166
1167 if (remain) {
1168 jiffies_to_timeval(ticks, &tmp);
1169 if (put_tv32(remain, &tmp))
1170 goto fault;
1171 }
1172
1173 return 0;
1174 fault:
1175 return -EFAULT;
1176 }
1177
1178
1179 struct timex32 {
1180 unsigned int modes; /* mode selector */
1181 long offset; /* time offset (usec) */
1182 long freq; /* frequency offset (scaled ppm) */
1183 long maxerror; /* maximum error (usec) */
1184 long esterror; /* estimated error (usec) */
1185 int status; /* clock command/status */
1186 long constant; /* pll time constant */
1187 long precision; /* clock precision (usec) (read only) */
1188 long tolerance; /* clock frequency tolerance (ppm)
1189 * (read only)
1190 */
1191 struct timeval32 time; /* (read only) */
1192 long tick; /* (modified) usecs between clock ticks */
1193
1194 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1195 long jitter; /* pps jitter (us) (ro) */
1196 int shift; /* interval duration (s) (shift) (ro) */
1197 long stabil; /* pps stability (scaled ppm) (ro) */
1198 long jitcnt; /* jitter limit exceeded (ro) */
1199 long calcnt; /* calibration intervals (ro) */
1200 long errcnt; /* calibration errors (ro) */
1201 long stbcnt; /* stability limit exceeded (ro) */
1202
1203 int :32; int :32; int :32; int :32;
1204 int :32; int :32; int :32; int :32;
1205 int :32; int :32; int :32; int :32;
1206 };
1207
1208 asmlinkage int
1209 sys_old_adjtimex(struct timex32 __user *txc_p)
1210 {
1211 struct timex txc;
1212 int ret;
1213
1214 /* copy relevant bits of struct timex. */
1215 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1216 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1217 offsetof(struct timex32, time)))
1218 return -EFAULT;
1219
1220 ret = do_adjtimex(&txc);
1221 if (ret < 0)
1222 return ret;
1223
1224 /* copy back to timex32 */
1225 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1226 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1227 offsetof(struct timex32, tick))) ||
1228 (put_tv32(&txc_p->time, &txc.time)))
1229 return -EFAULT;
1230
1231 return ret;
1232 }
1233
1234 /* Get an address range which is currently unmapped. Similar to the
1235 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1236
1237 static unsigned long
1238 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1239 unsigned long limit)
1240 {
1241 struct vm_area_struct *vma = find_vma(current->mm, addr);
1242
1243 while (1) {
1244 /* At this point: (!vma || addr < vma->vm_end). */
1245 if (limit - len < addr)
1246 return -ENOMEM;
1247 if (!vma || addr + len <= vma->vm_start)
1248 return addr;
1249 addr = vma->vm_end;
1250 vma = vma->vm_next;
1251 }
1252 }
1253
1254 unsigned long
1255 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1256 unsigned long len, unsigned long pgoff,
1257 unsigned long flags)
1258 {
1259 unsigned long limit;
1260
1261 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1262 if (current->personality & ADDR_LIMIT_32BIT)
1263 limit = 0x80000000;
1264 else
1265 limit = TASK_SIZE;
1266
1267 if (len > limit)
1268 return -ENOMEM;
1269
1270 /* First, see if the given suggestion fits.
1271
1272 The OSF/1 loader (/sbin/loader) relies on us returning an
1273 address larger than the requested if one exists, which is
1274 a terribly broken way to program.
1275
1276 That said, I can see the use in being able to suggest not
1277 merely specific addresses, but regions of memory -- perhaps
1278 this feature should be incorporated into all ports? */
1279
1280 if (addr) {
1281 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1282 if (addr != (unsigned long) -ENOMEM)
1283 return addr;
1284 }
1285
1286 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1287 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1288 len, limit);
1289 if (addr != (unsigned long) -ENOMEM)
1290 return addr;
1291
1292 /* Finally, try allocating in low memory. */
1293 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1294
1295 return addr;
1296 }
1297
1298 #ifdef CONFIG_OSF4_COMPAT
1299
1300 /* Clear top 32 bits of iov_len in the user's buffer for
1301 compatibility with old versions of OSF/1 where iov_len
1302 was defined as int. */
1303 static int
1304 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1305 {
1306 unsigned long i;
1307
1308 for (i = 0 ; i < count ; i++) {
1309 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1310
1311 if (put_user(0, iov_len_high))
1312 return -EFAULT;
1313 }
1314 return 0;
1315 }
1316
1317 asmlinkage ssize_t
1318 osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long count)
1319 {
1320 if (unlikely(personality(current->personality) == PER_OSF4))
1321 if (osf_fix_iov_len(vector, count))
1322 return -EFAULT;
1323 return sys_readv(fd, vector, count);
1324 }
1325
1326 asmlinkage ssize_t
1327 osf_writev(unsigned long fd, const struct iovec __user * vector, unsigned long count)
1328 {
1329 if (unlikely(personality(current->personality) == PER_OSF4))
1330 if (osf_fix_iov_len(vector, count))
1331 return -EFAULT;
1332 return sys_writev(fd, vector, count);
1333 }
1334
1335 #endif
Linux with added FPC-III support