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[libata] struct pci_dev related cleanups
[linux-2.6/x86.git] / arch / alpha / kernel / osf_sys.c
blobce857158c1eacc2a1b22ac0f6c278a5501d9d42b
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
97 struct osf_dirent {
98 unsigned int d_ino;
99 unsigned short d_reclen;
100 unsigned short d_namlen;
101 char d_name[1];
102 };
103
104 struct osf_dirent_callback {
105 struct osf_dirent __user *dirent;
106 long __user *basep;
107 unsigned int count;
108 int error;
109 };
110
111 static int
112 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset,
113 u64 ino, unsigned int d_type)
114 {
115 struct osf_dirent __user *dirent;
116 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf;
117 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
118 unsigned int d_ino;
119
120 buf->error = -EINVAL; /* only used if we fail */
121 if (reclen > buf->count)
122 return -EINVAL;
123 d_ino = ino;
124 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
125 return -EOVERFLOW;
126 if (buf->basep) {
127 if (put_user(offset, buf->basep))
128 return -EFAULT;
129 buf->basep = NULL;
130 }
131 dirent = buf->dirent;
132 put_user(d_ino, &dirent->d_ino);
133 put_user(namlen, &dirent->d_namlen);
134 put_user(reclen, &dirent->d_reclen);
135 if (copy_to_user(dirent->d_name, name, namlen) ||
136 put_user(0, dirent->d_name + namlen))
137 return -EFAULT;
138 dirent = (void __user *)dirent + reclen;
139 buf->dirent = dirent;
140 buf->count -= reclen;
141 return 0;
142 }
143
144 asmlinkage int
145 osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent,
146 unsigned int count, long __user *basep)
147 {
148 int error;
149 struct file *file;
150 struct osf_dirent_callback buf;
151
152 error = -EBADF;
153 file = fget(fd);
154 if (!file)
155 goto out;
156
157 buf.dirent = dirent;
158 buf.basep = basep;
159 buf.count = count;
160 buf.error = 0;
161
162 error = vfs_readdir(file, osf_filldir, &buf);
163 if (error < 0)
164 goto out_putf;
165
166 error = buf.error;
167 if (count != buf.count)
168 error = count - buf.count;
169
170 out_putf:
171 fput(file);
172 out:
173 return error;
174 }
175
176 #undef NAME_OFFSET
177
178 asmlinkage unsigned long
179 osf_mmap(unsigned long addr, unsigned long len, unsigned long prot,
180 unsigned long flags, unsigned long fd, unsigned long off)
181 {
182 struct file *file = NULL;
183 unsigned long ret = -EBADF;
184
185 #if 0
186 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
187 printk("%s: unimplemented OSF mmap flags %04lx\n",
188 current->comm, flags);
189 #endif
190 if (!(flags & MAP_ANONYMOUS)) {
191 file = fget(fd);
192 if (!file)
193 goto out;
194 }
195 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
196 down_write(&current->mm->mmap_sem);
197 ret = do_mmap(file, addr, len, prot, flags, off);
198 up_write(&current->mm->mmap_sem);
199 if (file)
200 fput(file);
201 out:
202 return ret;
203 }
204
205
206 /*
207 * The OSF/1 statfs structure is much larger, but this should
208 * match the beginning, at least.
209 */
210 struct osf_statfs {
211 short f_type;
212 short f_flags;
213 int f_fsize;
214 int f_bsize;
215 int f_blocks;
216 int f_bfree;
217 int f_bavail;
218 int f_files;
219 int f_ffree;
220 __kernel_fsid_t f_fsid;
221 };
222
223 static int
224 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
225 unsigned long bufsiz)
226 {
227 struct osf_statfs tmp_stat;
228
229 tmp_stat.f_type = linux_stat->f_type;
230 tmp_stat.f_flags = 0; /* mount flags */
231 tmp_stat.f_fsize = linux_stat->f_frsize;
232 tmp_stat.f_bsize = linux_stat->f_bsize;
233 tmp_stat.f_blocks = linux_stat->f_blocks;
234 tmp_stat.f_bfree = linux_stat->f_bfree;
235 tmp_stat.f_bavail = linux_stat->f_bavail;
236 tmp_stat.f_files = linux_stat->f_files;
237 tmp_stat.f_ffree = linux_stat->f_ffree;
238 tmp_stat.f_fsid = linux_stat->f_fsid;
239 if (bufsiz > sizeof(tmp_stat))
240 bufsiz = sizeof(tmp_stat);
241 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
242 }
243
244 static int
245 do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer,
246 unsigned long bufsiz)
247 {
248 struct kstatfs linux_stat;
249 int error = vfs_statfs(dentry, &linux_stat);
250 if (!error)
251 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
252 return error;
253 }
254
255 asmlinkage int
256 osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bufsiz)
257 {
258 struct nameidata nd;
259 int retval;
260
261 retval = user_path_walk(path, &nd);
262 if (!retval) {
263 retval = do_osf_statfs(nd.dentry, buffer, bufsiz);
264 path_release(&nd);
265 }
266 return retval;
267 }
268
269 asmlinkage int
270 osf_fstatfs(unsigned long fd, struct osf_statfs __user *buffer, unsigned long bufsiz)
271 {
272 struct file *file;
273 int retval;
274
275 retval = -EBADF;
276 file = fget(fd);
277 if (file) {
278 retval = do_osf_statfs(file->f_path.dentry, buffer, bufsiz);
279 fput(file);
280 }
281 return retval;
282 }
283
284 /*
285 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
286 *
287 * Although to be frank, neither are the native Linux/i386 ones..
288 */
289 struct ufs_args {
290 char __user *devname;
291 int flags;
292 uid_t exroot;
293 };
294
295 struct cdfs_args {
296 char __user *devname;
297 int flags;
298 uid_t exroot;
299
300 /* This has lots more here, which Linux handles with the option block
301 but I'm too lazy to do the translation into ASCII. */
302 };
303
304 struct procfs_args {
305 char __user *devname;
306 int flags;
307 uid_t exroot;
308 };
309
310 /*
311 * We can't actually handle ufs yet, so we translate UFS mounts to
312 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
313 * layout is so braindead it's a major headache doing it.
314 *
315 * Just how long ago was it written? OTOH our UFS driver may be still
316 * unhappy with OSF UFS. [CHECKME]
317 */
318 static int
319 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
320 {
321 int retval;
322 struct cdfs_args tmp;
323 char *devname;
324
325 retval = -EFAULT;
326 if (copy_from_user(&tmp, args, sizeof(tmp)))
327 goto out;
328 devname = getname(tmp.devname);
329 retval = PTR_ERR(devname);
330 if (IS_ERR(devname))
331 goto out;
332 retval = do_mount(devname, dirname, "ext2", flags, NULL);
333 putname(devname);
334 out:
335 return retval;
336 }
337
338 static int
339 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
340 {
341 int retval;
342 struct cdfs_args tmp;
343 char *devname;
344
345 retval = -EFAULT;
346 if (copy_from_user(&tmp, args, sizeof(tmp)))
347 goto out;
348 devname = getname(tmp.devname);
349 retval = PTR_ERR(devname);
350 if (IS_ERR(devname))
351 goto out;
352 retval = do_mount(devname, dirname, "iso9660", flags, NULL);
353 putname(devname);
354 out:
355 return retval;
356 }
357
358 static int
359 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags)
360 {
361 struct procfs_args tmp;
362
363 if (copy_from_user(&tmp, args, sizeof(tmp)))
364 return -EFAULT;
365
366 return do_mount("", dirname, "proc", flags, NULL);
367 }
368
369 asmlinkage int
370 osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data)
371 {
372 int retval = -EINVAL;
373 char *name;
374
375 lock_kernel();
376
377 name = getname(path);
378 retval = PTR_ERR(name);
379 if (IS_ERR(name))
380 goto out;
381 switch (typenr) {
382 case 1:
383 retval = osf_ufs_mount(name, data, flag);
384 break;
385 case 6:
386 retval = osf_cdfs_mount(name, data, flag);
387 break;
388 case 9:
389 retval = osf_procfs_mount(name, data, flag);
390 break;
391 default:
392 printk("osf_mount(%ld, %x)\n", typenr, flag);
393 }
394 putname(name);
395 out:
396 unlock_kernel();
397 return retval;
398 }
399
400 asmlinkage int
401 osf_utsname(char __user *name)
402 {
403 int error;
404
405 down_read(&uts_sem);
406 error = -EFAULT;
407 if (copy_to_user(name + 0, utsname()->sysname, 32))
408 goto out;
409 if (copy_to_user(name + 32, utsname()->nodename, 32))
410 goto out;
411 if (copy_to_user(name + 64, utsname()->release, 32))
412 goto out;
413 if (copy_to_user(name + 96, utsname()->version, 32))
414 goto out;
415 if (copy_to_user(name + 128, utsname()->machine, 32))
416 goto out;
417
418 error = 0;
419 out:
420 up_read(&uts_sem);
421 return error;
422 }
423
424 asmlinkage unsigned long
425 sys_getpagesize(void)
426 {
427 return PAGE_SIZE;
428 }
429
430 asmlinkage unsigned long
431 sys_getdtablesize(void)
432 {
433 return NR_OPEN;
434 }
435
436 /*
437 * For compatibility with OSF/1 only. Use utsname(2) instead.
438 */
439 asmlinkage int
440 osf_getdomainname(char __user *name, int namelen)
441 {
442 unsigned len;
443 int i;
444
445 if (!access_ok(VERIFY_WRITE, name, namelen))
446 return -EFAULT;
447
448 len = namelen;
449 if (namelen > 32)
450 len = 32;
451
452 down_read(&uts_sem);
453 for (i = 0; i < len; ++i) {
454 __put_user(utsname()->domainname[i], name + i);
455 if (utsname()->domainname[i] == '\0')
456 break;
457 }
458 up_read(&uts_sem);
459
460 return 0;
461 }
462
463 /*
464 * The following stuff should move into a header file should it ever
465 * be labeled "officially supported." Right now, there is just enough
466 * support to avoid applications (such as tar) printing error
467 * messages. The attributes are not really implemented.
468 */
469
470 /*
471 * Values for Property list entry flag
472 */
473 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
474 by default */
475 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
476 #define PLE_FLAG_ALL -1 /* All flag value */
477
478 struct proplistname_args {
479 unsigned int pl_mask;
480 unsigned int pl_numnames;
481 char **pl_names;
482 };
483
484 union pl_args {
485 struct setargs {
486 char __user *path;
487 long follow;
488 long nbytes;
489 char __user *buf;
490 } set;
491 struct fsetargs {
492 long fd;
493 long nbytes;
494 char __user *buf;
495 } fset;
496 struct getargs {
497 char __user *path;
498 long follow;
499 struct proplistname_args __user *name_args;
500 long nbytes;
501 char __user *buf;
502 int __user *min_buf_size;
503 } get;
504 struct fgetargs {
505 long fd;
506 struct proplistname_args __user *name_args;
507 long nbytes;
508 char __user *buf;
509 int __user *min_buf_size;
510 } fget;
511 struct delargs {
512 char __user *path;
513 long follow;
514 struct proplistname_args __user *name_args;
515 } del;
516 struct fdelargs {
517 long fd;
518 struct proplistname_args __user *name_args;
519 } fdel;
520 };
521
522 enum pl_code {
523 PL_SET = 1, PL_FSET = 2,
524 PL_GET = 3, PL_FGET = 4,
525 PL_DEL = 5, PL_FDEL = 6
526 };
527
528 asmlinkage long
529 osf_proplist_syscall(enum pl_code code, union pl_args __user *args)
530 {
531 long error;
532 int __user *min_buf_size_ptr;
533
534 lock_kernel();
535 switch (code) {
536 case PL_SET:
537 if (get_user(error, &args->set.nbytes))
538 error = -EFAULT;
539 break;
540 case PL_FSET:
541 if (get_user(error, &args->fset.nbytes))
542 error = -EFAULT;
543 break;
544 case PL_GET:
545 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
546 if (error)
547 break;
548 error = put_user(0, min_buf_size_ptr);
549 break;
550 case PL_FGET:
551 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
552 if (error)
553 break;
554 error = put_user(0, min_buf_size_ptr);
555 break;
556 case PL_DEL:
557 case PL_FDEL:
558 error = 0;
559 break;
560 default:
561 error = -EOPNOTSUPP;
562 break;
563 };
564 unlock_kernel();
565 return error;
566 }
567
568 asmlinkage int
569 osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss)
570 {
571 unsigned long usp = rdusp();
572 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
573 unsigned long oss_os = on_sig_stack(usp);
574 int error;
575
576 if (uss) {
577 void __user *ss_sp;
578
579 error = -EFAULT;
580 if (get_user(ss_sp, &uss->ss_sp))
581 goto out;
582
583 /* If the current stack was set with sigaltstack, don't
584 swap stacks while we are on it. */
585 error = -EPERM;
586 if (current->sas_ss_sp && on_sig_stack(usp))
587 goto out;
588
589 /* Since we don't know the extent of the stack, and we don't
590 track onstack-ness, but rather calculate it, we must
591 presume a size. Ho hum this interface is lossy. */
592 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
593 current->sas_ss_size = SIGSTKSZ;
594 }
595
596 if (uoss) {
597 error = -EFAULT;
598 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
599 || __put_user(oss_sp, &uoss->ss_sp)
600 || __put_user(oss_os, &uoss->ss_onstack))
601 goto out;
602 }
603
604 error = 0;
605 out:
606 return error;
607 }
608
609 asmlinkage long
610 osf_sysinfo(int command, char __user *buf, long count)
611 {
612 char *sysinfo_table[] = {
613 utsname()->sysname,
614 utsname()->nodename,
615 utsname()->release,
616 utsname()->version,
617 utsname()->machine,
618 "alpha", /* instruction set architecture */
619 "dummy", /* hardware serial number */
620 "dummy", /* hardware manufacturer */
621 "dummy", /* secure RPC domain */
622 };
623 unsigned long offset;
624 char *res;
625 long len, err = -EINVAL;
626
627 offset = command-1;
628 if (offset >= ARRAY_SIZE(sysinfo_table)) {
629 /* Digital UNIX has a few unpublished interfaces here */
630 printk("sysinfo(%d)", command);
631 goto out;
632 }
633
634 down_read(&uts_sem);
635 res = sysinfo_table[offset];
636 len = strlen(res)+1;
637 if (len > count)
638 len = count;
639 if (copy_to_user(buf, res, len))
640 err = -EFAULT;
641 else
642 err = 0;
643 up_read(&uts_sem);
644 out:
645 return err;
646 }
647
648 asmlinkage unsigned long
649 osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes,
650 int __user *start, void __user *arg)
651 {
652 unsigned long w;
653 struct percpu_struct *cpu;
654
655 switch (op) {
656 case GSI_IEEE_FP_CONTROL:
657 /* Return current software fp control & status bits. */
658 /* Note that DU doesn't verify available space here. */
659
660 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
661 w = swcr_update_status(w, rdfpcr());
662 if (put_user(w, (unsigned long __user *) buffer))
663 return -EFAULT;
664 return 0;
665
666 case GSI_IEEE_STATE_AT_SIGNAL:
667 /*
668 * Not sure anybody will ever use this weird stuff. These
669 * ops can be used (under OSF/1) to set the fpcr that should
670 * be used when a signal handler starts executing.
671 */
672 break;
673
674 case GSI_UACPROC:
675 if (nbytes < sizeof(unsigned int))
676 return -EINVAL;
677 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK;
678 if (put_user(w, (unsigned int __user *)buffer))
679 return -EFAULT;
680 return 1;
681
682 case GSI_PROC_TYPE:
683 if (nbytes < sizeof(unsigned long))
684 return -EINVAL;
685 cpu = (struct percpu_struct*)
686 ((char*)hwrpb + hwrpb->processor_offset);
687 w = cpu->type;
688 if (put_user(w, (unsigned long __user*)buffer))
689 return -EFAULT;
690 return 1;
691
692 case GSI_GET_HWRPB:
693 if (nbytes < sizeof(*hwrpb))
694 return -EINVAL;
695 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
696 return -EFAULT;
697 return 1;
698
699 default:
700 break;
701 }
702
703 return -EOPNOTSUPP;
704 }
705
706 asmlinkage unsigned long
707 osf_setsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes,
708 int __user *start, void __user *arg)
709 {
710 switch (op) {
711 case SSI_IEEE_FP_CONTROL: {
712 unsigned long swcr, fpcr;
713 unsigned int *state;
714
715 /*
716 * Alpha Architecture Handbook 4.7.7.3:
717 * To be fully IEEE compiant, we must track the current IEEE
718 * exception state in software, because spurrious bits can be
719 * set in the trap shadow of a software-complete insn.
720 */
721
722 if (get_user(swcr, (unsigned long __user *)buffer))
723 return -EFAULT;
724 state = &current_thread_info()->ieee_state;
725
726 /* Update softare trap enable bits. */
727 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
728
729 /* Update the real fpcr. */
730 fpcr = rdfpcr() & FPCR_DYN_MASK;
731 fpcr |= ieee_swcr_to_fpcr(swcr);
732 wrfpcr(fpcr);
733
734 return 0;
735 }
736
737 case SSI_IEEE_RAISE_EXCEPTION: {
738 unsigned long exc, swcr, fpcr, fex;
739 unsigned int *state;
740
741 if (get_user(exc, (unsigned long __user *)buffer))
742 return -EFAULT;
743 state = &current_thread_info()->ieee_state;
744 exc &= IEEE_STATUS_MASK;
745
746 /* Update softare trap enable bits. */
747 swcr = (*state & IEEE_SW_MASK) | exc;
748 *state |= exc;
749
750 /* Update the real fpcr. */
751 fpcr = rdfpcr();
752 fpcr |= ieee_swcr_to_fpcr(swcr);
753 wrfpcr(fpcr);
754
755 /* If any exceptions set by this call, and are unmasked,
756 send a signal. Old exceptions are not signaled. */
757 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
758 if (fex) {
759 siginfo_t info;
760 int si_code = 0;
761
762 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
763 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
764 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
765 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
766 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
767 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
768
769 info.si_signo = SIGFPE;
770 info.si_errno = 0;
771 info.si_code = si_code;
772 info.si_addr = NULL; /* FIXME */
773 send_sig_info(SIGFPE, &info, current);
774 }
775 return 0;
776 }
777
778 case SSI_IEEE_STATE_AT_SIGNAL:
779 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
780 /*
781 * Not sure anybody will ever use this weird stuff. These
782 * ops can be used (under OSF/1) to set the fpcr that should
783 * be used when a signal handler starts executing.
784 */
785 break;
786
787 case SSI_NVPAIRS: {
788 unsigned long v, w, i;
789 unsigned int old, new;
790
791 for (i = 0; i < nbytes; ++i) {
792
793 if (get_user(v, 2*i + (unsigned int __user *)buffer))
794 return -EFAULT;
795 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
796 return -EFAULT;
797 switch (v) {
798 case SSIN_UACPROC:
799 again:
800 old = current_thread_info()->flags;
801 new = old & ~(UAC_BITMASK << UAC_SHIFT);
802 new = new | (w & UAC_BITMASK) << UAC_SHIFT;
803 if (cmpxchg(&current_thread_info()->flags,
804 old, new) != old)
805 goto again;
806 break;
807
808 default:
809 return -EOPNOTSUPP;
810 }
811 }
812 return 0;
813 }
814
815 default:
816 break;
817 }
818
819 return -EOPNOTSUPP;
820 }
821
822 /* Translations due to the fact that OSF's time_t is an int. Which
823 affects all sorts of things, like timeval and itimerval. */
824
825 extern struct timezone sys_tz;
826
827 struct timeval32
828 {
829 int tv_sec, tv_usec;
830 };
831
832 struct itimerval32
833 {
834 struct timeval32 it_interval;
835 struct timeval32 it_value;
836 };
837
838 static inline long
839 get_tv32(struct timeval *o, struct timeval32 __user *i)
840 {
841 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
842 (__get_user(o->tv_sec, &i->tv_sec) |
843 __get_user(o->tv_usec, &i->tv_usec)));
844 }
845
846 static inline long
847 put_tv32(struct timeval32 __user *o, struct timeval *i)
848 {
849 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
850 (__put_user(i->tv_sec, &o->tv_sec) |
851 __put_user(i->tv_usec, &o->tv_usec)));
852 }
853
854 static inline long
855 get_it32(struct itimerval *o, struct itimerval32 __user *i)
856 {
857 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
858 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
859 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
860 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
861 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
862 }
863
864 static inline long
865 put_it32(struct itimerval32 __user *o, struct itimerval *i)
866 {
867 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
868 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
869 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
870 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
871 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
872 }
873
874 static inline void
875 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
876 {
877 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
878 value->tv_sec = jiffies / HZ;
879 }
880
881 asmlinkage int
882 osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
883 {
884 if (tv) {
885 struct timeval ktv;
886 do_gettimeofday(&ktv);
887 if (put_tv32(tv, &ktv))
888 return -EFAULT;
889 }
890 if (tz) {
891 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
892 return -EFAULT;
893 }
894 return 0;
895 }
896
897 asmlinkage int
898 osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
899 {
900 struct timespec kts;
901 struct timezone ktz;
902
903 if (tv) {
904 if (get_tv32((struct timeval *)&kts, tv))
905 return -EFAULT;
906 }
907 if (tz) {
908 if (copy_from_user(&ktz, tz, sizeof(*tz)))
909 return -EFAULT;
910 }
911
912 kts.tv_nsec *= 1000;
913
914 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
915 }
916
917 asmlinkage int
918 osf_getitimer(int which, struct itimerval32 __user *it)
919 {
920 struct itimerval kit;
921 int error;
922
923 error = do_getitimer(which, &kit);
924 if (!error && put_it32(it, &kit))
925 error = -EFAULT;
926
927 return error;
928 }
929
930 asmlinkage int
931 osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __user *out)
932 {
933 struct itimerval kin, kout;
934 int error;
935
936 if (in) {
937 if (get_it32(&kin, in))
938 return -EFAULT;
939 } else
940 memset(&kin, 0, sizeof(kin));
941
942 error = do_setitimer(which, &kin, out ? &kout : NULL);
943 if (error || !out)
944 return error;
945
946 if (put_it32(out, &kout))
947 return -EFAULT;
948
949 return 0;
950
951 }
952
953 asmlinkage int
954 osf_utimes(char __user *filename, struct timeval32 __user *tvs)
955 {
956 struct timespec tv[2];
957
958 if (tvs) {
959 struct timeval ktvs[2];
960 if (get_tv32(&ktvs[0], &tvs[0]) ||
961 get_tv32(&ktvs[1], &tvs[1]))
962 return -EFAULT;
963
964 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
965 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
966 return -EINVAL;
967
968 tv[0].tv_sec = ktvs[0].tv_sec;
969 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
970 tv[1].tv_sec = ktvs[1].tv_sec;
971 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
972 }
973
974 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
975 }
976
977 #define MAX_SELECT_SECONDS \
978 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
979
980 asmlinkage int
981 osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
982 struct timeval32 __user *tvp)
983 {
984 fd_set_bits fds;
985 char *bits;
986 size_t size;
987 long timeout;
988 int ret = -EINVAL;
989 struct fdtable *fdt;
990 int max_fds;
991
992 timeout = MAX_SCHEDULE_TIMEOUT;
993 if (tvp) {
994 time_t sec, usec;
995
996 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
997 || __get_user(sec, &tvp->tv_sec)
998 || __get_user(usec, &tvp->tv_usec)) {
999 ret = -EFAULT;
1000 goto out_nofds;
1001 }
1002
1003 if (sec < 0 || usec < 0)
1004 goto out_nofds;
1005
1006 if ((unsigned long) sec < MAX_SELECT_SECONDS) {
1007 timeout = (usec + 1000000/HZ - 1) / (1000000/HZ);
1008 timeout += sec * (unsigned long) HZ;
1009 }
1010 }
1011
1012 rcu_read_lock();
1013 fdt = files_fdtable(current->files);
1014 max_fds = fdt->max_fds;
1015 rcu_read_unlock();
1016 if (n < 0 || n > max_fds)
1017 goto out_nofds;
1018
1019 /*
1020 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1021 * since we used fdset we need to allocate memory in units of
1022 * long-words.
1023 */
1024 ret = -ENOMEM;
1025 size = FDS_BYTES(n);
1026 bits = kmalloc(6 * size, GFP_KERNEL);
1027 if (!bits)
1028 goto out_nofds;
1029 fds.in = (unsigned long *) bits;
1030 fds.out = (unsigned long *) (bits + size);
1031 fds.ex = (unsigned long *) (bits + 2*size);
1032 fds.res_in = (unsigned long *) (bits + 3*size);
1033 fds.res_out = (unsigned long *) (bits + 4*size);
1034 fds.res_ex = (unsigned long *) (bits + 5*size);
1035
1036 if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) ||
1037 (ret = get_fd_set(n, outp->fds_bits, fds.out)) ||
1038 (ret = get_fd_set(n, exp->fds_bits, fds.ex)))
1039 goto out;
1040 zero_fd_set(n, fds.res_in);
1041 zero_fd_set(n, fds.res_out);
1042 zero_fd_set(n, fds.res_ex);
1043
1044 ret = do_select(n, &fds, &timeout);
1045
1046 /* OSF does not copy back the remaining time. */
1047
1048 if (ret < 0)
1049 goto out;
1050 if (!ret) {
1051 ret = -ERESTARTNOHAND;
1052 if (signal_pending(current))
1053 goto out;
1054 ret = 0;
1055 }
1056
1057 if (set_fd_set(n, inp->fds_bits, fds.res_in) ||
1058 set_fd_set(n, outp->fds_bits, fds.res_out) ||
1059 set_fd_set(n, exp->fds_bits, fds.res_ex))
1060 ret = -EFAULT;
1061
1062 out:
1063 kfree(bits);
1064 out_nofds:
1065 return ret;
1066 }
1067
1068 struct rusage32 {
1069 struct timeval32 ru_utime; /* user time used */
1070 struct timeval32 ru_stime; /* system time used */
1071 long ru_maxrss; /* maximum resident set size */
1072 long ru_ixrss; /* integral shared memory size */
1073 long ru_idrss; /* integral unshared data size */
1074 long ru_isrss; /* integral unshared stack size */
1075 long ru_minflt; /* page reclaims */
1076 long ru_majflt; /* page faults */
1077 long ru_nswap; /* swaps */
1078 long ru_inblock; /* block input operations */
1079 long ru_oublock; /* block output operations */
1080 long ru_msgsnd; /* messages sent */
1081 long ru_msgrcv; /* messages received */
1082 long ru_nsignals; /* signals received */
1083 long ru_nvcsw; /* voluntary context switches */
1084 long ru_nivcsw; /* involuntary " */
1085 };
1086
1087 asmlinkage int
1088 osf_getrusage(int who, struct rusage32 __user *ru)
1089 {
1090 struct rusage32 r;
1091
1092 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1093 return -EINVAL;
1094
1095 memset(&r, 0, sizeof(r));
1096 switch (who) {
1097 case RUSAGE_SELF:
1098 jiffies_to_timeval32(current->utime, &r.ru_utime);
1099 jiffies_to_timeval32(current->stime, &r.ru_stime);
1100 r.ru_minflt = current->min_flt;
1101 r.ru_majflt = current->maj_flt;
1102 break;
1103 case RUSAGE_CHILDREN:
1104 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1105 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1106 r.ru_minflt = current->signal->cmin_flt;
1107 r.ru_majflt = current->signal->cmaj_flt;
1108 break;
1109 }
1110
1111 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1112 }
1113
1114 asmlinkage long
1115 osf_wait4(pid_t pid, int __user *ustatus, int options,
1116 struct rusage32 __user *ur)
1117 {
1118 struct rusage r;
1119 long ret, err;
1120 mm_segment_t old_fs;
1121
1122 if (!ur)
1123 return sys_wait4(pid, ustatus, options, NULL);
1124
1125 old_fs = get_fs();
1126
1127 set_fs (KERNEL_DS);
1128 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r);
1129 set_fs (old_fs);
1130
1131 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1132 return -EFAULT;
1133
1134 err = 0;
1135 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1136 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1137 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1138 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1139 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1140 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1141 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1142 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1143 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1144 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1145 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1146 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1147 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1148 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1149 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1150 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1151 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1152 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1153
1154 return err ? err : ret;
1155 }
1156
1157 /*
1158 * I don't know what the parameters are: the first one
1159 * seems to be a timeval pointer, and I suspect the second
1160 * one is the time remaining.. Ho humm.. No documentation.
1161 */
1162 asmlinkage int
1163 osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain)
1164 {
1165 struct timeval tmp;
1166 unsigned long ticks;
1167
1168 if (get_tv32(&tmp, sleep))
1169 goto fault;
1170
1171 ticks = timeval_to_jiffies(&tmp);
1172
1173 ticks = schedule_timeout_interruptible(ticks);
1174
1175 if (remain) {
1176 jiffies_to_timeval(ticks, &tmp);
1177 if (put_tv32(remain, &tmp))
1178 goto fault;
1179 }
1180
1181 return 0;
1182 fault:
1183 return -EFAULT;
1184 }
1185
1186
1187 struct timex32 {
1188 unsigned int modes; /* mode selector */
1189 long offset; /* time offset (usec) */
1190 long freq; /* frequency offset (scaled ppm) */
1191 long maxerror; /* maximum error (usec) */
1192 long esterror; /* estimated error (usec) */
1193 int status; /* clock command/status */
1194 long constant; /* pll time constant */
1195 long precision; /* clock precision (usec) (read only) */
1196 long tolerance; /* clock frequency tolerance (ppm)
1197 * (read only)
1198 */
1199 struct timeval32 time; /* (read only) */
1200 long tick; /* (modified) usecs between clock ticks */
1201
1202 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1203 long jitter; /* pps jitter (us) (ro) */
1204 int shift; /* interval duration (s) (shift) (ro) */
1205 long stabil; /* pps stability (scaled ppm) (ro) */
1206 long jitcnt; /* jitter limit exceeded (ro) */
1207 long calcnt; /* calibration intervals (ro) */
1208 long errcnt; /* calibration errors (ro) */
1209 long stbcnt; /* stability limit exceeded (ro) */
1210
1211 int :32; int :32; int :32; int :32;
1212 int :32; int :32; int :32; int :32;
1213 int :32; int :32; int :32; int :32;
1214 };
1215
1216 asmlinkage int
1217 sys_old_adjtimex(struct timex32 __user *txc_p)
1218 {
1219 struct timex txc;
1220 int ret;
1221
1222 /* copy relevant bits of struct timex. */
1223 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1224 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1225 offsetof(struct timex32, time)))
1226 return -EFAULT;
1227
1228 ret = do_adjtimex(&txc);
1229 if (ret < 0)
1230 return ret;
1231
1232 /* copy back to timex32 */
1233 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1234 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1235 offsetof(struct timex32, tick))) ||
1236 (put_tv32(&txc_p->time, &txc.time)))
1237 return -EFAULT;
1238
1239 return ret;
1240 }
1241
1242 /* Get an address range which is currently unmapped. Similar to the
1243 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1244
1245 static unsigned long
1246 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1247 unsigned long limit)
1248 {
1249 struct vm_area_struct *vma = find_vma(current->mm, addr);
1250
1251 while (1) {
1252 /* At this point: (!vma || addr < vma->vm_end). */
1253 if (limit - len < addr)
1254 return -ENOMEM;
1255 if (!vma || addr + len <= vma->vm_start)
1256 return addr;
1257 addr = vma->vm_end;
1258 vma = vma->vm_next;
1259 }
1260 }
1261
1262 unsigned long
1263 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1264 unsigned long len, unsigned long pgoff,
1265 unsigned long flags)
1266 {
1267 unsigned long limit;
1268
1269 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1270 if (current->personality & ADDR_LIMIT_32BIT)
1271 limit = 0x80000000;
1272 else
1273 limit = TASK_SIZE;
1274
1275 if (len > limit)
1276 return -ENOMEM;
1277
1278 if (flags & MAP_FIXED)
1279 return addr;
1280
1281 /* First, see if the given suggestion fits.
1282
1283 The OSF/1 loader (/sbin/loader) relies on us returning an
1284 address larger than the requested if one exists, which is
1285 a terribly broken way to program.
1286
1287 That said, I can see the use in being able to suggest not
1288 merely specific addresses, but regions of memory -- perhaps
1289 this feature should be incorporated into all ports? */
1290
1291 if (addr) {
1292 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1293 if (addr != (unsigned long) -ENOMEM)
1294 return addr;
1295 }
1296
1297 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1298 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1299 len, limit);
1300 if (addr != (unsigned long) -ENOMEM)
1301 return addr;
1302
1303 /* Finally, try allocating in low memory. */
1304 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1305
1306 return addr;
1307 }
1308
1309 #ifdef CONFIG_OSF4_COMPAT
1310
1311 /* Clear top 32 bits of iov_len in the user's buffer for
1312 compatibility with old versions of OSF/1 where iov_len
1313 was defined as int. */
1314 static int
1315 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1316 {
1317 unsigned long i;
1318
1319 for (i = 0 ; i < count ; i++) {
1320 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1321
1322 if (put_user(0, iov_len_high))
1323 return -EFAULT;
1324 }
1325 return 0;
1326 }
1327
1328 asmlinkage ssize_t
1329 osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long count)
1330 {
1331 if (unlikely(personality(current->personality) == PER_OSF4))
1332 if (osf_fix_iov_len(vector, count))
1333 return -EFAULT;
1334 return sys_readv(fd, vector, count);
1335 }
1336
1337 asmlinkage ssize_t
1338 osf_writev(unsigned long fd, const struct iovec __user * vector, unsigned long count)
1339 {
1340 if (unlikely(personality(current->personality) == PER_OSF4))
1341 if (osf_fix_iov_len(vector, count))
1342 return -EFAULT;
1343 return sys_writev(fd, vector, count);
1344 }
1345
1346 #endif
x86 "subsystem" repository