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x86, fpu: split FPU state from task struct - v5
[linux-2.6/mini2440.git] / arch / alpha / kernel / osf_sys.c
blob8c71daf94a59ce0f27537a4c8352ab362152dbbe
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 extern int do_pipe(int *);
50
51 /*
52 * Brk needs to return an error. Still support Linux's brk(0) query idiom,
53 * which OSF programs just shouldn't be doing. We're still not quite
54 * identical to OSF as we don't return 0 on success, but doing otherwise
55 * would require changes to libc. Hopefully this is good enough.
56 */
57 asmlinkage unsigned long
58 osf_brk(unsigned long brk)
59 {
60 unsigned long retval = sys_brk(brk);
61 if (brk && brk != retval)
62 retval = -ENOMEM;
63 return retval;
64 }
65
66 /*
67 * This is pure guess-work..
68 */
69 asmlinkage int
70 osf_set_program_attributes(unsigned long text_start, unsigned long text_len,
71 unsigned long bss_start, unsigned long bss_len)
72 {
73 struct mm_struct *mm;
74
75 lock_kernel();
76 mm = current->mm;
77 mm->end_code = bss_start + bss_len;
78 mm->brk = bss_start + bss_len;
79 #if 0
80 printk("set_program_attributes(%lx %lx %lx %lx)\n",
81 text_start, text_len, bss_start, bss_len);
82 #endif
83 unlock_kernel();
84 return 0;
85 }
86
87 /*
88 * OSF/1 directory handling functions...
89 *
90 * The "getdents()" interface is much more sane: the "basep" stuff is
91 * braindamage (it can't really handle filesystems where the directory
92 * offset differences aren't the same as "d_reclen").
93 */
94 #define NAME_OFFSET offsetof (struct osf_dirent, d_name)
95
96 struct osf_dirent {
97 unsigned int d_ino;
98 unsigned short d_reclen;
99 unsigned short d_namlen;
100 char d_name[1];
101 };
102
103 struct osf_dirent_callback {
104 struct osf_dirent __user *dirent;
105 long __user *basep;
106 unsigned int count;
107 int error;
108 };
109
110 static int
111 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset,
112 u64 ino, unsigned int d_type)
113 {
114 struct osf_dirent __user *dirent;
115 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf;
116 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
117 unsigned int d_ino;
118
119 buf->error = -EINVAL; /* only used if we fail */
120 if (reclen > buf->count)
121 return -EINVAL;
122 d_ino = ino;
123 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
124 return -EOVERFLOW;
125 if (buf->basep) {
126 if (put_user(offset, buf->basep))
127 return -EFAULT;
128 buf->basep = NULL;
129 }
130 dirent = buf->dirent;
131 put_user(d_ino, &dirent->d_ino);
132 put_user(namlen, &dirent->d_namlen);
133 put_user(reclen, &dirent->d_reclen);
134 if (copy_to_user(dirent->d_name, name, namlen) ||
135 put_user(0, dirent->d_name + namlen))
136 return -EFAULT;
137 dirent = (void __user *)dirent + reclen;
138 buf->dirent = dirent;
139 buf->count -= reclen;
140 return 0;
141 }
142
143 asmlinkage int
144 osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent,
145 unsigned int count, long __user *basep)
146 {
147 int error;
148 struct file *file;
149 struct osf_dirent_callback buf;
150
151 error = -EBADF;
152 file = fget(fd);
153 if (!file)
154 goto out;
155
156 buf.dirent = dirent;
157 buf.basep = basep;
158 buf.count = count;
159 buf.error = 0;
160
161 error = vfs_readdir(file, osf_filldir, &buf);
162 if (error < 0)
163 goto out_putf;
164
165 error = buf.error;
166 if (count != buf.count)
167 error = count - buf.count;
168
169 out_putf:
170 fput(file);
171 out:
172 return error;
173 }
174
175 #undef NAME_OFFSET
176
177 asmlinkage unsigned long
178 osf_mmap(unsigned long addr, unsigned long len, unsigned long prot,
179 unsigned long flags, unsigned long fd, unsigned long off)
180 {
181 struct file *file = NULL;
182 unsigned long ret = -EBADF;
183
184 #if 0
185 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
186 printk("%s: unimplemented OSF mmap flags %04lx\n",
187 current->comm, flags);
188 #endif
189 if (!(flags & MAP_ANONYMOUS)) {
190 file = fget(fd);
191 if (!file)
192 goto out;
193 }
194 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
195 down_write(&current->mm->mmap_sem);
196 ret = do_mmap(file, addr, len, prot, flags, off);
197 up_write(&current->mm->mmap_sem);
198 if (file)
199 fput(file);
200 out:
201 return ret;
202 }
203
204
205 /*
206 * The OSF/1 statfs structure is much larger, but this should
207 * match the beginning, at least.
208 */
209 struct osf_statfs {
210 short f_type;
211 short f_flags;
212 int f_fsize;
213 int f_bsize;
214 int f_blocks;
215 int f_bfree;
216 int f_bavail;
217 int f_files;
218 int f_ffree;
219 __kernel_fsid_t f_fsid;
220 };
221
222 static int
223 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
224 unsigned long bufsiz)
225 {
226 struct osf_statfs tmp_stat;
227
228 tmp_stat.f_type = linux_stat->f_type;
229 tmp_stat.f_flags = 0; /* mount flags */
230 tmp_stat.f_fsize = linux_stat->f_frsize;
231 tmp_stat.f_bsize = linux_stat->f_bsize;
232 tmp_stat.f_blocks = linux_stat->f_blocks;
233 tmp_stat.f_bfree = linux_stat->f_bfree;
234 tmp_stat.f_bavail = linux_stat->f_bavail;
235 tmp_stat.f_files = linux_stat->f_files;
236 tmp_stat.f_ffree = linux_stat->f_ffree;
237 tmp_stat.f_fsid = linux_stat->f_fsid;
238 if (bufsiz > sizeof(tmp_stat))
239 bufsiz = sizeof(tmp_stat);
240 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
241 }
242
243 static int
244 do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer,
245 unsigned long bufsiz)
246 {
247 struct kstatfs linux_stat;
248 int error = vfs_statfs(dentry, &linux_stat);
249 if (!error)
250 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
251 return error;
252 }
253
254 asmlinkage int
255 osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bufsiz)
256 {
257 struct nameidata nd;
258 int retval;
259
260 retval = user_path_walk(path, &nd);
261 if (!retval) {
262 retval = do_osf_statfs(nd.path.dentry, buffer, bufsiz);
263 path_put(&nd.path);
264 }
265 return retval;
266 }
267
268 asmlinkage int
269 osf_fstatfs(unsigned long fd, struct osf_statfs __user *buffer, unsigned long bufsiz)
270 {
271 struct file *file;
272 int retval;
273
274 retval = -EBADF;
275 file = fget(fd);
276 if (file) {
277 retval = do_osf_statfs(file->f_path.dentry, buffer, bufsiz);
278 fput(file);
279 }
280 return retval;
281 }
282
283 /*
284 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
285 *
286 * Although to be frank, neither are the native Linux/i386 ones..
287 */
288 struct ufs_args {
289 char __user *devname;
290 int flags;
291 uid_t exroot;
292 };
293
294 struct cdfs_args {
295 char __user *devname;
296 int flags;
297 uid_t exroot;
298
299 /* This has lots more here, which Linux handles with the option block
300 but I'm too lazy to do the translation into ASCII. */
301 };
302
303 struct procfs_args {
304 char __user *devname;
305 int flags;
306 uid_t exroot;
307 };
308
309 /*
310 * We can't actually handle ufs yet, so we translate UFS mounts to
311 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
312 * layout is so braindead it's a major headache doing it.
313 *
314 * Just how long ago was it written? OTOH our UFS driver may be still
315 * unhappy with OSF UFS. [CHECKME]
316 */
317 static int
318 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
319 {
320 int retval;
321 struct cdfs_args tmp;
322 char *devname;
323
324 retval = -EFAULT;
325 if (copy_from_user(&tmp, args, sizeof(tmp)))
326 goto out;
327 devname = getname(tmp.devname);
328 retval = PTR_ERR(devname);
329 if (IS_ERR(devname))
330 goto out;
331 retval = do_mount(devname, dirname, "ext2", flags, NULL);
332 putname(devname);
333 out:
334 return retval;
335 }
336
337 static int
338 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
339 {
340 int retval;
341 struct cdfs_args tmp;
342 char *devname;
343
344 retval = -EFAULT;
345 if (copy_from_user(&tmp, args, sizeof(tmp)))
346 goto out;
347 devname = getname(tmp.devname);
348 retval = PTR_ERR(devname);
349 if (IS_ERR(devname))
350 goto out;
351 retval = do_mount(devname, dirname, "iso9660", flags, NULL);
352 putname(devname);
353 out:
354 return retval;
355 }
356
357 static int
358 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags)
359 {
360 struct procfs_args tmp;
361
362 if (copy_from_user(&tmp, args, sizeof(tmp)))
363 return -EFAULT;
364
365 return do_mount("", dirname, "proc", flags, NULL);
366 }
367
368 asmlinkage int
369 osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data)
370 {
371 int retval = -EINVAL;
372 char *name;
373
374 lock_kernel();
375
376 name = getname(path);
377 retval = PTR_ERR(name);
378 if (IS_ERR(name))
379 goto out;
380 switch (typenr) {
381 case 1:
382 retval = osf_ufs_mount(name, data, flag);
383 break;
384 case 6:
385 retval = osf_cdfs_mount(name, data, flag);
386 break;
387 case 9:
388 retval = osf_procfs_mount(name, data, flag);
389 break;
390 default:
391 printk("osf_mount(%ld, %x)\n", typenr, flag);
392 }
393 putname(name);
394 out:
395 unlock_kernel();
396 return retval;
397 }
398
399 asmlinkage int
400 osf_utsname(char __user *name)
401 {
402 int error;
403
404 down_read(&uts_sem);
405 error = -EFAULT;
406 if (copy_to_user(name + 0, utsname()->sysname, 32))
407 goto out;
408 if (copy_to_user(name + 32, utsname()->nodename, 32))
409 goto out;
410 if (copy_to_user(name + 64, utsname()->release, 32))
411 goto out;
412 if (copy_to_user(name + 96, utsname()->version, 32))
413 goto out;
414 if (copy_to_user(name + 128, utsname()->machine, 32))
415 goto out;
416
417 error = 0;
418 out:
419 up_read(&uts_sem);
420 return error;
421 }
422
423 asmlinkage unsigned long
424 sys_getpagesize(void)
425 {
426 return PAGE_SIZE;
427 }
428
429 asmlinkage unsigned long
430 sys_getdtablesize(void)
431 {
432 return sysctl_nr_open;
433 }
434
435 /*
436 * For compatibility with OSF/1 only. Use utsname(2) instead.
437 */
438 asmlinkage int
439 osf_getdomainname(char __user *name, int namelen)
440 {
441 unsigned len;
442 int i;
443
444 if (!access_ok(VERIFY_WRITE, name, namelen))
445 return -EFAULT;
446
447 len = namelen;
448 if (namelen > 32)
449 len = 32;
450
451 down_read(&uts_sem);
452 for (i = 0; i < len; ++i) {
453 __put_user(utsname()->domainname[i], name + i);
454 if (utsname()->domainname[i] == '\0')
455 break;
456 }
457 up_read(&uts_sem);
458
459 return 0;
460 }
461
462 /*
463 * The following stuff should move into a header file should it ever
464 * be labeled "officially supported." Right now, there is just enough
465 * support to avoid applications (such as tar) printing error
466 * messages. The attributes are not really implemented.
467 */
468
469 /*
470 * Values for Property list entry flag
471 */
472 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
473 by default */
474 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
475 #define PLE_FLAG_ALL -1 /* All flag value */
476
477 struct proplistname_args {
478 unsigned int pl_mask;
479 unsigned int pl_numnames;
480 char **pl_names;
481 };
482
483 union pl_args {
484 struct setargs {
485 char __user *path;
486 long follow;
487 long nbytes;
488 char __user *buf;
489 } set;
490 struct fsetargs {
491 long fd;
492 long nbytes;
493 char __user *buf;
494 } fset;
495 struct getargs {
496 char __user *path;
497 long follow;
498 struct proplistname_args __user *name_args;
499 long nbytes;
500 char __user *buf;
501 int __user *min_buf_size;
502 } get;
503 struct fgetargs {
504 long fd;
505 struct proplistname_args __user *name_args;
506 long nbytes;
507 char __user *buf;
508 int __user *min_buf_size;
509 } fget;
510 struct delargs {
511 char __user *path;
512 long follow;
513 struct proplistname_args __user *name_args;
514 } del;
515 struct fdelargs {
516 long fd;
517 struct proplistname_args __user *name_args;
518 } fdel;
519 };
520
521 enum pl_code {
522 PL_SET = 1, PL_FSET = 2,
523 PL_GET = 3, PL_FGET = 4,
524 PL_DEL = 5, PL_FDEL = 6
525 };
526
527 asmlinkage long
528 osf_proplist_syscall(enum pl_code code, union pl_args __user *args)
529 {
530 long error;
531 int __user *min_buf_size_ptr;
532
533 lock_kernel();
534 switch (code) {
535 case PL_SET:
536 if (get_user(error, &args->set.nbytes))
537 error = -EFAULT;
538 break;
539 case PL_FSET:
540 if (get_user(error, &args->fset.nbytes))
541 error = -EFAULT;
542 break;
543 case PL_GET:
544 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
545 if (error)
546 break;
547 error = put_user(0, min_buf_size_ptr);
548 break;
549 case PL_FGET:
550 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
551 if (error)
552 break;
553 error = put_user(0, min_buf_size_ptr);
554 break;
555 case PL_DEL:
556 case PL_FDEL:
557 error = 0;
558 break;
559 default:
560 error = -EOPNOTSUPP;
561 break;
562 };
563 unlock_kernel();
564 return error;
565 }
566
567 asmlinkage int
568 osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss)
569 {
570 unsigned long usp = rdusp();
571 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
572 unsigned long oss_os = on_sig_stack(usp);
573 int error;
574
575 if (uss) {
576 void __user *ss_sp;
577
578 error = -EFAULT;
579 if (get_user(ss_sp, &uss->ss_sp))
580 goto out;
581
582 /* If the current stack was set with sigaltstack, don't
583 swap stacks while we are on it. */
584 error = -EPERM;
585 if (current->sas_ss_sp && on_sig_stack(usp))
586 goto out;
587
588 /* Since we don't know the extent of the stack, and we don't
589 track onstack-ness, but rather calculate it, we must
590 presume a size. Ho hum this interface is lossy. */
591 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
592 current->sas_ss_size = SIGSTKSZ;
593 }
594
595 if (uoss) {
596 error = -EFAULT;
597 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
598 || __put_user(oss_sp, &uoss->ss_sp)
599 || __put_user(oss_os, &uoss->ss_onstack))
600 goto out;
601 }
602
603 error = 0;
604 out:
605 return error;
606 }
607
608 asmlinkage long
609 osf_sysinfo(int command, char __user *buf, long count)
610 {
611 char *sysinfo_table[] = {
612 utsname()->sysname,
613 utsname()->nodename,
614 utsname()->release,
615 utsname()->version,
616 utsname()->machine,
617 "alpha", /* instruction set architecture */
618 "dummy", /* hardware serial number */
619 "dummy", /* hardware manufacturer */
620 "dummy", /* secure RPC domain */
621 };
622 unsigned long offset;
623 char *res;
624 long len, err = -EINVAL;
625
626 offset = command-1;
627 if (offset >= ARRAY_SIZE(sysinfo_table)) {
628 /* Digital UNIX has a few unpublished interfaces here */
629 printk("sysinfo(%d)", command);
630 goto out;
631 }
632
633 down_read(&uts_sem);
634 res = sysinfo_table[offset];
635 len = strlen(res)+1;
636 if (len > count)
637 len = count;
638 if (copy_to_user(buf, res, len))
639 err = -EFAULT;
640 else
641 err = 0;
642 up_read(&uts_sem);
643 out:
644 return err;
645 }
646
647 asmlinkage unsigned long
648 osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes,
649 int __user *start, void __user *arg)
650 {
651 unsigned long w;
652 struct percpu_struct *cpu;
653
654 switch (op) {
655 case GSI_IEEE_FP_CONTROL:
656 /* Return current software fp control & status bits. */
657 /* Note that DU doesn't verify available space here. */
658
659 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
660 w = swcr_update_status(w, rdfpcr());
661 if (put_user(w, (unsigned long __user *) buffer))
662 return -EFAULT;
663 return 0;
664
665 case GSI_IEEE_STATE_AT_SIGNAL:
666 /*
667 * Not sure anybody will ever use this weird stuff. These
668 * ops can be used (under OSF/1) to set the fpcr that should
669 * be used when a signal handler starts executing.
670 */
671 break;
672
673 case GSI_UACPROC:
674 if (nbytes < sizeof(unsigned int))
675 return -EINVAL;
676 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK;
677 if (put_user(w, (unsigned int __user *)buffer))
678 return -EFAULT;
679 return 1;
680
681 case GSI_PROC_TYPE:
682 if (nbytes < sizeof(unsigned long))
683 return -EINVAL;
684 cpu = (struct percpu_struct*)
685 ((char*)hwrpb + hwrpb->processor_offset);
686 w = cpu->type;
687 if (put_user(w, (unsigned long __user*)buffer))
688 return -EFAULT;
689 return 1;
690
691 case GSI_GET_HWRPB:
692 if (nbytes < sizeof(*hwrpb))
693 return -EINVAL;
694 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
695 return -EFAULT;
696 return 1;
697
698 default:
699 break;
700 }
701
702 return -EOPNOTSUPP;
703 }
704
705 asmlinkage unsigned long
706 osf_setsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes,
707 int __user *start, void __user *arg)
708 {
709 switch (op) {
710 case SSI_IEEE_FP_CONTROL: {
711 unsigned long swcr, fpcr;
712 unsigned int *state;
713
714 /*
715 * Alpha Architecture Handbook 4.7.7.3:
716 * To be fully IEEE compiant, we must track the current IEEE
717 * exception state in software, because spurious bits can be
718 * set in the trap shadow of a software-complete insn.
719 */
720
721 if (get_user(swcr, (unsigned long __user *)buffer))
722 return -EFAULT;
723 state = &current_thread_info()->ieee_state;
724
725 /* Update softare trap enable bits. */
726 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
727
728 /* Update the real fpcr. */
729 fpcr = rdfpcr() & FPCR_DYN_MASK;
730 fpcr |= ieee_swcr_to_fpcr(swcr);
731 wrfpcr(fpcr);
732
733 return 0;
734 }
735
736 case SSI_IEEE_RAISE_EXCEPTION: {
737 unsigned long exc, swcr, fpcr, fex;
738 unsigned int *state;
739
740 if (get_user(exc, (unsigned long __user *)buffer))
741 return -EFAULT;
742 state = &current_thread_info()->ieee_state;
743 exc &= IEEE_STATUS_MASK;
744
745 /* Update softare trap enable bits. */
746 swcr = (*state & IEEE_SW_MASK) | exc;
747 *state |= exc;
748
749 /* Update the real fpcr. */
750 fpcr = rdfpcr();
751 fpcr |= ieee_swcr_to_fpcr(swcr);
752 wrfpcr(fpcr);
753
754 /* If any exceptions set by this call, and are unmasked,
755 send a signal. Old exceptions are not signaled. */
756 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
757 if (fex) {
758 siginfo_t info;
759 int si_code = 0;
760
761 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
762 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
763 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
764 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
765 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
766 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
767
768 info.si_signo = SIGFPE;
769 info.si_errno = 0;
770 info.si_code = si_code;
771 info.si_addr = NULL; /* FIXME */
772 send_sig_info(SIGFPE, &info, current);
773 }
774 return 0;
775 }
776
777 case SSI_IEEE_STATE_AT_SIGNAL:
778 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
779 /*
780 * Not sure anybody will ever use this weird stuff. These
781 * ops can be used (under OSF/1) to set the fpcr that should
782 * be used when a signal handler starts executing.
783 */
784 break;
785
786 case SSI_NVPAIRS: {
787 unsigned long v, w, i;
788 unsigned int old, new;
789
790 for (i = 0; i < nbytes; ++i) {
791
792 if (get_user(v, 2*i + (unsigned int __user *)buffer))
793 return -EFAULT;
794 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
795 return -EFAULT;
796 switch (v) {
797 case SSIN_UACPROC:
798 again:
799 old = current_thread_info()->flags;
800 new = old & ~(UAC_BITMASK << UAC_SHIFT);
801 new = new | (w & UAC_BITMASK) << UAC_SHIFT;
802 if (cmpxchg(&current_thread_info()->flags,
803 old, new) != old)
804 goto again;
805 break;
806
807 default:
808 return -EOPNOTSUPP;
809 }
810 }
811 return 0;
812 }
813
814 default:
815 break;
816 }
817
818 return -EOPNOTSUPP;
819 }
820
821 /* Translations due to the fact that OSF's time_t is an int. Which
822 affects all sorts of things, like timeval and itimerval. */
823
824 extern struct timezone sys_tz;
825
826 struct timeval32
827 {
828 int tv_sec, tv_usec;
829 };
830
831 struct itimerval32
832 {
833 struct timeval32 it_interval;
834 struct timeval32 it_value;
835 };
836
837 static inline long
838 get_tv32(struct timeval *o, struct timeval32 __user *i)
839 {
840 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
841 (__get_user(o->tv_sec, &i->tv_sec) |
842 __get_user(o->tv_usec, &i->tv_usec)));
843 }
844
845 static inline long
846 put_tv32(struct timeval32 __user *o, struct timeval *i)
847 {
848 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
849 (__put_user(i->tv_sec, &o->tv_sec) |
850 __put_user(i->tv_usec, &o->tv_usec)));
851 }
852
853 static inline long
854 get_it32(struct itimerval *o, struct itimerval32 __user *i)
855 {
856 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
857 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
858 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
859 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
860 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
861 }
862
863 static inline long
864 put_it32(struct itimerval32 __user *o, struct itimerval *i)
865 {
866 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
867 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
868 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
869 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
870 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
871 }
872
873 static inline void
874 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
875 {
876 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
877 value->tv_sec = jiffies / HZ;
878 }
879
880 asmlinkage int
881 osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
882 {
883 if (tv) {
884 struct timeval ktv;
885 do_gettimeofday(&ktv);
886 if (put_tv32(tv, &ktv))
887 return -EFAULT;
888 }
889 if (tz) {
890 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
891 return -EFAULT;
892 }
893 return 0;
894 }
895
896 asmlinkage int
897 osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
898 {
899 struct timespec kts;
900 struct timezone ktz;
901
902 if (tv) {
903 if (get_tv32((struct timeval *)&kts, tv))
904 return -EFAULT;
905 }
906 if (tz) {
907 if (copy_from_user(&ktz, tz, sizeof(*tz)))
908 return -EFAULT;
909 }
910
911 kts.tv_nsec *= 1000;
912
913 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
914 }
915
916 asmlinkage int
917 osf_getitimer(int which, struct itimerval32 __user *it)
918 {
919 struct itimerval kit;
920 int error;
921
922 error = do_getitimer(which, &kit);
923 if (!error && put_it32(it, &kit))
924 error = -EFAULT;
925
926 return error;
927 }
928
929 asmlinkage int
930 osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __user *out)
931 {
932 struct itimerval kin, kout;
933 int error;
934
935 if (in) {
936 if (get_it32(&kin, in))
937 return -EFAULT;
938 } else
939 memset(&kin, 0, sizeof(kin));
940
941 error = do_setitimer(which, &kin, out ? &kout : NULL);
942 if (error || !out)
943 return error;
944
945 if (put_it32(out, &kout))
946 return -EFAULT;
947
948 return 0;
949
950 }
951
952 asmlinkage int
953 osf_utimes(char __user *filename, struct timeval32 __user *tvs)
954 {
955 struct timespec tv[2];
956
957 if (tvs) {
958 struct timeval ktvs[2];
959 if (get_tv32(&ktvs[0], &tvs[0]) ||
960 get_tv32(&ktvs[1], &tvs[1]))
961 return -EFAULT;
962
963 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
964 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
965 return -EINVAL;
966
967 tv[0].tv_sec = ktvs[0].tv_sec;
968 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
969 tv[1].tv_sec = ktvs[1].tv_sec;
970 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
971 }
972
973 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
974 }
975
976 #define MAX_SELECT_SECONDS \
977 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
978
979 asmlinkage int
980 osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
981 struct timeval32 __user *tvp)
982 {
983 fd_set_bits fds;
984 char *bits;
985 size_t size;
986 long timeout;
987 int ret = -EINVAL;
988 struct fdtable *fdt;
989 int max_fds;
990
991 timeout = MAX_SCHEDULE_TIMEOUT;
992 if (tvp) {
993 time_t sec, usec;
994
995 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
996 || __get_user(sec, &tvp->tv_sec)
997 || __get_user(usec, &tvp->tv_usec)) {
998 ret = -EFAULT;
999 goto out_nofds;
1000 }
1001
1002 if (sec < 0 || usec < 0)
1003 goto out_nofds;
1004
1005 if ((unsigned long) sec < MAX_SELECT_SECONDS) {
1006 timeout = (usec + 1000000/HZ - 1) / (1000000/HZ);
1007 timeout += sec * (unsigned long) HZ;
1008 }
1009 }
1010
1011 rcu_read_lock();
1012 fdt = files_fdtable(current->files);
1013 max_fds = fdt->max_fds;
1014 rcu_read_unlock();
1015 if (n < 0 || n > max_fds)
1016 goto out_nofds;
1017
1018 /*
1019 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1020 * since we used fdset we need to allocate memory in units of
1021 * long-words.
1022 */
1023 ret = -ENOMEM;
1024 size = FDS_BYTES(n);
1025 bits = kmalloc(6 * size, GFP_KERNEL);
1026 if (!bits)
1027 goto out_nofds;
1028 fds.in = (unsigned long *) bits;
1029 fds.out = (unsigned long *) (bits + size);
1030 fds.ex = (unsigned long *) (bits + 2*size);
1031 fds.res_in = (unsigned long *) (bits + 3*size);
1032 fds.res_out = (unsigned long *) (bits + 4*size);
1033 fds.res_ex = (unsigned long *) (bits + 5*size);
1034
1035 if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) ||
1036 (ret = get_fd_set(n, outp->fds_bits, fds.out)) ||
1037 (ret = get_fd_set(n, exp->fds_bits, fds.ex)))
1038 goto out;
1039 zero_fd_set(n, fds.res_in);
1040 zero_fd_set(n, fds.res_out);
1041 zero_fd_set(n, fds.res_ex);
1042
1043 ret = do_select(n, &fds, &timeout);
1044
1045 /* OSF does not copy back the remaining time. */
1046
1047 if (ret < 0)
1048 goto out;
1049 if (!ret) {
1050 ret = -ERESTARTNOHAND;
1051 if (signal_pending(current))
1052 goto out;
1053 ret = 0;
1054 }
1055
1056 if (set_fd_set(n, inp->fds_bits, fds.res_in) ||
1057 set_fd_set(n, outp->fds_bits, fds.res_out) ||
1058 set_fd_set(n, exp->fds_bits, fds.res_ex))
1059 ret = -EFAULT;
1060
1061 out:
1062 kfree(bits);
1063 out_nofds:
1064 return ret;
1065 }
1066
1067 struct rusage32 {
1068 struct timeval32 ru_utime; /* user time used */
1069 struct timeval32 ru_stime; /* system time used */
1070 long ru_maxrss; /* maximum resident set size */
1071 long ru_ixrss; /* integral shared memory size */
1072 long ru_idrss; /* integral unshared data size */
1073 long ru_isrss; /* integral unshared stack size */
1074 long ru_minflt; /* page reclaims */
1075 long ru_majflt; /* page faults */
1076 long ru_nswap; /* swaps */
1077 long ru_inblock; /* block input operations */
1078 long ru_oublock; /* block output operations */
1079 long ru_msgsnd; /* messages sent */
1080 long ru_msgrcv; /* messages received */
1081 long ru_nsignals; /* signals received */
1082 long ru_nvcsw; /* voluntary context switches */
1083 long ru_nivcsw; /* involuntary " */
1084 };
1085
1086 asmlinkage int
1087 osf_getrusage(int who, struct rusage32 __user *ru)
1088 {
1089 struct rusage32 r;
1090
1091 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1092 return -EINVAL;
1093
1094 memset(&r, 0, sizeof(r));
1095 switch (who) {
1096 case RUSAGE_SELF:
1097 jiffies_to_timeval32(current->utime, &r.ru_utime);
1098 jiffies_to_timeval32(current->stime, &r.ru_stime);
1099 r.ru_minflt = current->min_flt;
1100 r.ru_majflt = current->maj_flt;
1101 break;
1102 case RUSAGE_CHILDREN:
1103 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1104 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1105 r.ru_minflt = current->signal->cmin_flt;
1106 r.ru_majflt = current->signal->cmaj_flt;
1107 break;
1108 }
1109
1110 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1111 }
1112
1113 asmlinkage long
1114 osf_wait4(pid_t pid, int __user *ustatus, int options,
1115 struct rusage32 __user *ur)
1116 {
1117 struct rusage r;
1118 long ret, err;
1119 mm_segment_t old_fs;
1120
1121 if (!ur)
1122 return sys_wait4(pid, ustatus, options, NULL);
1123
1124 old_fs = get_fs();
1125
1126 set_fs (KERNEL_DS);
1127 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r);
1128 set_fs (old_fs);
1129
1130 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1131 return -EFAULT;
1132
1133 err = 0;
1134 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1135 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1136 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1137 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1138 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1139 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1140 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1141 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1142 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1143 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1144 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1145 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1146 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1147 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1148 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1149 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1150 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1151 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1152
1153 return err ? err : ret;
1154 }
1155
1156 /*
1157 * I don't know what the parameters are: the first one
1158 * seems to be a timeval pointer, and I suspect the second
1159 * one is the time remaining.. Ho humm.. No documentation.
1160 */
1161 asmlinkage int
1162 osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain)
1163 {
1164 struct timeval tmp;
1165 unsigned long ticks;
1166
1167 if (get_tv32(&tmp, sleep))
1168 goto fault;
1169
1170 ticks = timeval_to_jiffies(&tmp);
1171
1172 ticks = schedule_timeout_interruptible(ticks);
1173
1174 if (remain) {
1175 jiffies_to_timeval(ticks, &tmp);
1176 if (put_tv32(remain, &tmp))
1177 goto fault;
1178 }
1179
1180 return 0;
1181 fault:
1182 return -EFAULT;
1183 }
1184
1185
1186 struct timex32 {
1187 unsigned int modes; /* mode selector */
1188 long offset; /* time offset (usec) */
1189 long freq; /* frequency offset (scaled ppm) */
1190 long maxerror; /* maximum error (usec) */
1191 long esterror; /* estimated error (usec) */
1192 int status; /* clock command/status */
1193 long constant; /* pll time constant */
1194 long precision; /* clock precision (usec) (read only) */
1195 long tolerance; /* clock frequency tolerance (ppm)
1196 * (read only)
1197 */
1198 struct timeval32 time; /* (read only) */
1199 long tick; /* (modified) usecs between clock ticks */
1200
1201 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1202 long jitter; /* pps jitter (us) (ro) */
1203 int shift; /* interval duration (s) (shift) (ro) */
1204 long stabil; /* pps stability (scaled ppm) (ro) */
1205 long jitcnt; /* jitter limit exceeded (ro) */
1206 long calcnt; /* calibration intervals (ro) */
1207 long errcnt; /* calibration errors (ro) */
1208 long stbcnt; /* stability limit exceeded (ro) */
1209
1210 int :32; int :32; int :32; int :32;
1211 int :32; int :32; int :32; int :32;
1212 int :32; int :32; int :32; int :32;
1213 };
1214
1215 asmlinkage int
1216 sys_old_adjtimex(struct timex32 __user *txc_p)
1217 {
1218 struct timex txc;
1219 int ret;
1220
1221 /* copy relevant bits of struct timex. */
1222 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1223 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1224 offsetof(struct timex32, time)))
1225 return -EFAULT;
1226
1227 ret = do_adjtimex(&txc);
1228 if (ret < 0)
1229 return ret;
1230
1231 /* copy back to timex32 */
1232 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1233 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1234 offsetof(struct timex32, tick))) ||
1235 (put_tv32(&txc_p->time, &txc.time)))
1236 return -EFAULT;
1237
1238 return ret;
1239 }
1240
1241 /* Get an address range which is currently unmapped. Similar to the
1242 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1243
1244 static unsigned long
1245 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1246 unsigned long limit)
1247 {
1248 struct vm_area_struct *vma = find_vma(current->mm, addr);
1249
1250 while (1) {
1251 /* At this point: (!vma || addr < vma->vm_end). */
1252 if (limit - len < addr)
1253 return -ENOMEM;
1254 if (!vma || addr + len <= vma->vm_start)
1255 return addr;
1256 addr = vma->vm_end;
1257 vma = vma->vm_next;
1258 }
1259 }
1260
1261 unsigned long
1262 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1263 unsigned long len, unsigned long pgoff,
1264 unsigned long flags)
1265 {
1266 unsigned long limit;
1267
1268 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1269 if (current->personality & ADDR_LIMIT_32BIT)
1270 limit = 0x80000000;
1271 else
1272 limit = TASK_SIZE;
1273
1274 if (len > limit)
1275 return -ENOMEM;
1276
1277 if (flags & MAP_FIXED)
1278 return addr;
1279
1280 /* First, see if the given suggestion fits.
1281
1282 The OSF/1 loader (/sbin/loader) relies on us returning an
1283 address larger than the requested if one exists, which is
1284 a terribly broken way to program.
1285
1286 That said, I can see the use in being able to suggest not
1287 merely specific addresses, but regions of memory -- perhaps
1288 this feature should be incorporated into all ports? */
1289
1290 if (addr) {
1291 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1292 if (addr != (unsigned long) -ENOMEM)
1293 return addr;
1294 }
1295
1296 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1297 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1298 len, limit);
1299 if (addr != (unsigned long) -ENOMEM)
1300 return addr;
1301
1302 /* Finally, try allocating in low memory. */
1303 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1304
1305 return addr;
1306 }
1307
1308 #ifdef CONFIG_OSF4_COMPAT
1309
1310 /* Clear top 32 bits of iov_len in the user's buffer for
1311 compatibility with old versions of OSF/1 where iov_len
1312 was defined as int. */
1313 static int
1314 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1315 {
1316 unsigned long i;
1317
1318 for (i = 0 ; i < count ; i++) {
1319 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1320
1321 if (put_user(0, iov_len_high))
1322 return -EFAULT;
1323 }
1324 return 0;
1325 }
1326
1327 asmlinkage ssize_t
1328 osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long count)
1329 {
1330 if (unlikely(personality(current->personality) == PER_OSF4))
1331 if (osf_fix_iov_len(vector, count))
1332 return -EFAULT;
1333 return sys_readv(fd, vector, count);
1334 }
1335
1336 asmlinkage ssize_t
1337 osf_writev(unsigned long fd, const struct iovec __user * vector, unsigned long count)
1338 {
1339 if (unlikely(personality(current->personality) == PER_OSF4))
1340 if (osf_fix_iov_len(vector, count))
1341 return -EFAULT;
1342 return sys_writev(fd, vector, count);
1343 }
1344
1345 #endif
Support for the Chinese Samsung S3C2440 based development boards