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Linux-2.6.12-rc2
[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / arch / alpha / kernel / osf_sys.c
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
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 #define ROUND_UP(x) (((x)+3) & ~3)
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 ino_t 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 = ROUND_UP(NAME_OFFSET + namlen + 1);
118
119 buf->error = -EINVAL; /* only used if we fail */
120 if (reclen > buf->count)
121 return -EINVAL;
122 if (buf->basep) {
123 if (put_user(offset, buf->basep))
124 return -EFAULT;
125 buf->basep = NULL;
126 }
127 dirent = buf->dirent;
128 put_user(ino, &dirent->d_ino);
129 put_user(namlen, &dirent->d_namlen);
130 put_user(reclen, &dirent->d_reclen);
131 if (copy_to_user(dirent->d_name, name, namlen) ||
132 put_user(0, dirent->d_name + namlen))
133 return -EFAULT;
134 dirent = (void __user *)dirent + reclen;
135 buf->dirent = dirent;
136 buf->count -= reclen;
137 return 0;
138 }
139
140 asmlinkage int
141 osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent,
142 unsigned int count, long __user *basep)
143 {
144 int error;
145 struct file *file;
146 struct osf_dirent_callback buf;
147
148 error = -EBADF;
149 file = fget(fd);
150 if (!file)
151 goto out;
152
153 buf.dirent = dirent;
154 buf.basep = basep;
155 buf.count = count;
156 buf.error = 0;
157
158 error = vfs_readdir(file, osf_filldir, &buf);
159 if (error < 0)
160 goto out_putf;
161
162 error = buf.error;
163 if (count != buf.count)
164 error = count - buf.count;
165
166 out_putf:
167 fput(file);
168 out:
169 return error;
170 }
171
172 #undef ROUND_UP
173 #undef NAME_OFFSET
174
175 asmlinkage unsigned long
176 osf_mmap(unsigned long addr, unsigned long len, unsigned long prot,
177 unsigned long flags, unsigned long fd, unsigned long off)
178 {
179 struct file *file = NULL;
180 unsigned long ret = -EBADF;
181
182 #if 0
183 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
184 printk("%s: unimplemented OSF mmap flags %04lx\n",
185 current->comm, flags);
186 #endif
187 if (!(flags & MAP_ANONYMOUS)) {
188 file = fget(fd);
189 if (!file)
190 goto out;
191 }
192 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
193 down_write(&current->mm->mmap_sem);
194 ret = do_mmap(file, addr, len, prot, flags, off);
195 up_write(&current->mm->mmap_sem);
196 if (file)
197 fput(file);
198 out:
199 return ret;
200 }
201
202
203 /*
204 * The OSF/1 statfs structure is much larger, but this should
205 * match the beginning, at least.
206 */
207 struct osf_statfs {
208 short f_type;
209 short f_flags;
210 int f_fsize;
211 int f_bsize;
212 int f_blocks;
213 int f_bfree;
214 int f_bavail;
215 int f_files;
216 int f_ffree;
217 __kernel_fsid_t f_fsid;
218 };
219
220 static int
221 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
222 unsigned long bufsiz)
223 {
224 struct osf_statfs tmp_stat;
225
226 tmp_stat.f_type = linux_stat->f_type;
227 tmp_stat.f_flags = 0; /* mount flags */
228 tmp_stat.f_fsize = linux_stat->f_frsize;
229 tmp_stat.f_bsize = linux_stat->f_bsize;
230 tmp_stat.f_blocks = linux_stat->f_blocks;
231 tmp_stat.f_bfree = linux_stat->f_bfree;
232 tmp_stat.f_bavail = linux_stat->f_bavail;
233 tmp_stat.f_files = linux_stat->f_files;
234 tmp_stat.f_ffree = linux_stat->f_ffree;
235 tmp_stat.f_fsid = linux_stat->f_fsid;
236 if (bufsiz > sizeof(tmp_stat))
237 bufsiz = sizeof(tmp_stat);
238 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
239 }
240
241 static int
242 do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer,
243 unsigned long bufsiz)
244 {
245 struct kstatfs linux_stat;
246 int error = vfs_statfs(dentry->d_inode->i_sb, &linux_stat);
247 if (!error)
248 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
249 return error;
250 }
251
252 asmlinkage int
253 osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bufsiz)
254 {
255 struct nameidata nd;
256 int retval;
257
258 retval = user_path_walk(path, &nd);
259 if (!retval) {
260 retval = do_osf_statfs(nd.dentry, buffer, bufsiz);
261 path_release(&nd);
262 }
263 return retval;
264 }
265
266 asmlinkage int
267 osf_fstatfs(unsigned long fd, struct osf_statfs __user *buffer, unsigned long bufsiz)
268 {
269 struct file *file;
270 int retval;
271
272 retval = -EBADF;
273 file = fget(fd);
274 if (file) {
275 retval = do_osf_statfs(file->f_dentry, buffer, bufsiz);
276 fput(file);
277 }
278 return retval;
279 }
280
281 /*
282 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
283 *
284 * Although to be frank, neither are the native Linux/i386 ones..
285 */
286 struct ufs_args {
287 char __user *devname;
288 int flags;
289 uid_t exroot;
290 };
291
292 struct cdfs_args {
293 char __user *devname;
294 int flags;
295 uid_t exroot;
296
297 /* This has lots more here, which Linux handles with the option block
298 but I'm too lazy to do the translation into ASCII. */
299 };
300
301 struct procfs_args {
302 char __user *devname;
303 int flags;
304 uid_t exroot;
305 };
306
307 /*
308 * We can't actually handle ufs yet, so we translate UFS mounts to
309 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
310 * layout is so braindead it's a major headache doing it.
311 *
312 * Just how long ago was it written? OTOH our UFS driver may be still
313 * unhappy with OSF UFS. [CHECKME]
314 */
315 static int
316 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
317 {
318 int retval;
319 struct cdfs_args tmp;
320 char *devname;
321
322 retval = -EFAULT;
323 if (copy_from_user(&tmp, args, sizeof(tmp)))
324 goto out;
325 devname = getname(tmp.devname);
326 retval = PTR_ERR(devname);
327 if (IS_ERR(devname))
328 goto out;
329 retval = do_mount(devname, dirname, "ext2", flags, NULL);
330 putname(devname);
331 out:
332 return retval;
333 }
334
335 static int
336 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
337 {
338 int retval;
339 struct cdfs_args tmp;
340 char *devname;
341
342 retval = -EFAULT;
343 if (copy_from_user(&tmp, args, sizeof(tmp)))
344 goto out;
345 devname = getname(tmp.devname);
346 retval = PTR_ERR(devname);
347 if (IS_ERR(devname))
348 goto out;
349 retval = do_mount(devname, dirname, "iso9660", flags, NULL);
350 putname(devname);
351 out:
352 return retval;
353 }
354
355 static int
356 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags)
357 {
358 struct procfs_args tmp;
359
360 if (copy_from_user(&tmp, args, sizeof(tmp)))
361 return -EFAULT;
362
363 return do_mount("", dirname, "proc", flags, NULL);
364 }
365
366 asmlinkage int
367 osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data)
368 {
369 int retval = -EINVAL;
370 char *name;
371
372 lock_kernel();
373
374 name = getname(path);
375 retval = PTR_ERR(name);
376 if (IS_ERR(name))
377 goto out;
378 switch (typenr) {
379 case 1:
380 retval = osf_ufs_mount(name, data, flag);
381 break;
382 case 6:
383 retval = osf_cdfs_mount(name, data, flag);
384 break;
385 case 9:
386 retval = osf_procfs_mount(name, data, flag);
387 break;
388 default:
389 printk("osf_mount(%ld, %x)\n", typenr, flag);
390 }
391 putname(name);
392 out:
393 unlock_kernel();
394 return retval;
395 }
396
397 asmlinkage int
398 osf_utsname(char __user *name)
399 {
400 int error;
401
402 down_read(&uts_sem);
403 error = -EFAULT;
404 if (copy_to_user(name + 0, system_utsname.sysname, 32))
405 goto out;
406 if (copy_to_user(name + 32, system_utsname.nodename, 32))
407 goto out;
408 if (copy_to_user(name + 64, system_utsname.release, 32))
409 goto out;
410 if (copy_to_user(name + 96, system_utsname.version, 32))
411 goto out;
412 if (copy_to_user(name + 128, system_utsname.machine, 32))
413 goto out;
414
415 error = 0;
416 out:
417 up_read(&uts_sem);
418 return error;
419 }
420
421 asmlinkage unsigned long
422 sys_getpagesize(void)
423 {
424 return PAGE_SIZE;
425 }
426
427 asmlinkage unsigned long
428 sys_getdtablesize(void)
429 {
430 return NR_OPEN;
431 }
432
433 /*
434 * For compatibility with OSF/1 only. Use utsname(2) instead.
435 */
436 asmlinkage int
437 osf_getdomainname(char __user *name, int namelen)
438 {
439 unsigned len;
440 int i;
441
442 if (!access_ok(VERIFY_WRITE, name, namelen))
443 return -EFAULT;
444
445 len = namelen;
446 if (namelen > 32)
447 len = 32;
448
449 down_read(&uts_sem);
450 for (i = 0; i < len; ++i) {
451 __put_user(system_utsname.domainname[i], name + i);
452 if (system_utsname.domainname[i] == '\0')
453 break;
454 }
455 up_read(&uts_sem);
456
457 return 0;
458 }
459
460 asmlinkage long
461 osf_shmat(int shmid, void __user *shmaddr, int shmflg)
462 {
463 unsigned long raddr;
464 long err;
465
466 err = do_shmat(shmid, shmaddr, shmflg, &raddr);
467
468 /*
469 * This works because all user-level addresses are
470 * non-negative longs!
471 */
472 return err ? err : (long)raddr;
473 }
474
475
476 /*
477 * The following stuff should move into a header file should it ever
478 * be labeled "officially supported." Right now, there is just enough
479 * support to avoid applications (such as tar) printing error
480 * messages. The attributes are not really implemented.
481 */
482
483 /*
484 * Values for Property list entry flag
485 */
486 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
487 by default */
488 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
489 #define PLE_FLAG_ALL -1 /* All flag value */
490
491 struct proplistname_args {
492 unsigned int pl_mask;
493 unsigned int pl_numnames;
494 char **pl_names;
495 };
496
497 union pl_args {
498 struct setargs {
499 char __user *path;
500 long follow;
501 long nbytes;
502 char __user *buf;
503 } set;
504 struct fsetargs {
505 long fd;
506 long nbytes;
507 char __user *buf;
508 } fset;
509 struct getargs {
510 char __user *path;
511 long follow;
512 struct proplistname_args __user *name_args;
513 long nbytes;
514 char __user *buf;
515 int __user *min_buf_size;
516 } get;
517 struct fgetargs {
518 long fd;
519 struct proplistname_args __user *name_args;
520 long nbytes;
521 char __user *buf;
522 int __user *min_buf_size;
523 } fget;
524 struct delargs {
525 char __user *path;
526 long follow;
527 struct proplistname_args __user *name_args;
528 } del;
529 struct fdelargs {
530 long fd;
531 struct proplistname_args __user *name_args;
532 } fdel;
533 };
534
535 enum pl_code {
536 PL_SET = 1, PL_FSET = 2,
537 PL_GET = 3, PL_FGET = 4,
538 PL_DEL = 5, PL_FDEL = 6
539 };
540
541 asmlinkage long
542 osf_proplist_syscall(enum pl_code code, union pl_args __user *args)
543 {
544 long error;
545 int __user *min_buf_size_ptr;
546
547 lock_kernel();
548 switch (code) {
549 case PL_SET:
550 if (get_user(error, &args->set.nbytes))
551 error = -EFAULT;
552 break;
553 case PL_FSET:
554 if (get_user(error, &args->fset.nbytes))
555 error = -EFAULT;
556 break;
557 case PL_GET:
558 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
559 if (error)
560 break;
561 error = put_user(0, min_buf_size_ptr);
562 break;
563 case PL_FGET:
564 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
565 if (error)
566 break;
567 error = put_user(0, min_buf_size_ptr);
568 break;
569 case PL_DEL:
570 case PL_FDEL:
571 error = 0;
572 break;
573 default:
574 error = -EOPNOTSUPP;
575 break;
576 };
577 unlock_kernel();
578 return error;
579 }
580
581 asmlinkage int
582 osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss)
583 {
584 unsigned long usp = rdusp();
585 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
586 unsigned long oss_os = on_sig_stack(usp);
587 int error;
588
589 if (uss) {
590 void __user *ss_sp;
591
592 error = -EFAULT;
593 if (get_user(ss_sp, &uss->ss_sp))
594 goto out;
595
596 /* If the current stack was set with sigaltstack, don't
597 swap stacks while we are on it. */
598 error = -EPERM;
599 if (current->sas_ss_sp && on_sig_stack(usp))
600 goto out;
601
602 /* Since we don't know the extent of the stack, and we don't
603 track onstack-ness, but rather calculate it, we must
604 presume a size. Ho hum this interface is lossy. */
605 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
606 current->sas_ss_size = SIGSTKSZ;
607 }
608
609 if (uoss) {
610 error = -EFAULT;
611 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
612 || __put_user(oss_sp, &uoss->ss_sp)
613 || __put_user(oss_os, &uoss->ss_onstack))
614 goto out;
615 }
616
617 error = 0;
618 out:
619 return error;
620 }
621
622 asmlinkage long
623 osf_sysinfo(int command, char __user *buf, long count)
624 {
625 static char * sysinfo_table[] = {
626 system_utsname.sysname,
627 system_utsname.nodename,
628 system_utsname.release,
629 system_utsname.version,
630 system_utsname.machine,
631 "alpha", /* instruction set architecture */
632 "dummy", /* hardware serial number */
633 "dummy", /* hardware manufacturer */
634 "dummy", /* secure RPC domain */
635 };
636 unsigned long offset;
637 char *res;
638 long len, err = -EINVAL;
639
640 offset = command-1;
641 if (offset >= sizeof(sysinfo_table)/sizeof(char *)) {
642 /* Digital UNIX has a few unpublished interfaces here */
643 printk("sysinfo(%d)", command);
644 goto out;
645 }
646
647 down_read(&uts_sem);
648 res = sysinfo_table[offset];
649 len = strlen(res)+1;
650 if (len > count)
651 len = count;
652 if (copy_to_user(buf, res, len))
653 err = -EFAULT;
654 else
655 err = 0;
656 up_read(&uts_sem);
657 out:
658 return err;
659 }
660
661 asmlinkage unsigned long
662 osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes,
663 int __user *start, void __user *arg)
664 {
665 unsigned long w;
666 struct percpu_struct *cpu;
667
668 switch (op) {
669 case GSI_IEEE_FP_CONTROL:
670 /* Return current software fp control & status bits. */
671 /* Note that DU doesn't verify available space here. */
672
673 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
674 w = swcr_update_status(w, rdfpcr());
675 if (put_user(w, (unsigned long __user *) buffer))
676 return -EFAULT;
677 return 0;
678
679 case GSI_IEEE_STATE_AT_SIGNAL:
680 /*
681 * Not sure anybody will ever use this weird stuff. These
682 * ops can be used (under OSF/1) to set the fpcr that should
683 * be used when a signal handler starts executing.
684 */
685 break;
686
687 case GSI_UACPROC:
688 if (nbytes < sizeof(unsigned int))
689 return -EINVAL;
690 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK;
691 if (put_user(w, (unsigned int __user *)buffer))
692 return -EFAULT;
693 return 1;
694
695 case GSI_PROC_TYPE:
696 if (nbytes < sizeof(unsigned long))
697 return -EINVAL;
698 cpu = (struct percpu_struct*)
699 ((char*)hwrpb + hwrpb->processor_offset);
700 w = cpu->type;
701 if (put_user(w, (unsigned long __user*)buffer))
702 return -EFAULT;
703 return 1;
704
705 case GSI_GET_HWRPB:
706 if (nbytes < sizeof(*hwrpb))
707 return -EINVAL;
708 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
709 return -EFAULT;
710 return 1;
711
712 default:
713 break;
714 }
715
716 return -EOPNOTSUPP;
717 }
718
719 asmlinkage unsigned long
720 osf_setsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes,
721 int __user *start, void __user *arg)
722 {
723 switch (op) {
724 case SSI_IEEE_FP_CONTROL: {
725 unsigned long swcr, fpcr;
726 unsigned int *state;
727
728 /*
729 * Alpha Architecture Handbook 4.7.7.3:
730 * To be fully IEEE compiant, we must track the current IEEE
731 * exception state in software, because spurrious bits can be
732 * set in the trap shadow of a software-complete insn.
733 */
734
735 if (get_user(swcr, (unsigned long __user *)buffer))
736 return -EFAULT;
737 state = &current_thread_info()->ieee_state;
738
739 /* Update softare trap enable bits. */
740 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
741
742 /* Update the real fpcr. */
743 fpcr = rdfpcr() & FPCR_DYN_MASK;
744 fpcr |= ieee_swcr_to_fpcr(swcr);
745 wrfpcr(fpcr);
746
747 return 0;
748 }
749
750 case SSI_IEEE_RAISE_EXCEPTION: {
751 unsigned long exc, swcr, fpcr, fex;
752 unsigned int *state;
753
754 if (get_user(exc, (unsigned long __user *)buffer))
755 return -EFAULT;
756 state = &current_thread_info()->ieee_state;
757 exc &= IEEE_STATUS_MASK;
758
759 /* Update softare trap enable bits. */
760 swcr = (*state & IEEE_SW_MASK) | exc;
761 *state |= exc;
762
763 /* Update the real fpcr. */
764 fpcr = rdfpcr();
765 fpcr |= ieee_swcr_to_fpcr(swcr);
766 wrfpcr(fpcr);
767
768 /* If any exceptions set by this call, and are unmasked,
769 send a signal. Old exceptions are not signaled. */
770 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
771 if (fex) {
772 siginfo_t info;
773 int si_code = 0;
774
775 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
776 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
777 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
778 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
779 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
780 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
781
782 info.si_signo = SIGFPE;
783 info.si_errno = 0;
784 info.si_code = si_code;
785 info.si_addr = NULL; /* FIXME */
786 send_sig_info(SIGFPE, &info, current);
787 }
788 return 0;
789 }
790
791 case SSI_IEEE_STATE_AT_SIGNAL:
792 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
793 /*
794 * Not sure anybody will ever use this weird stuff. These
795 * ops can be used (under OSF/1) to set the fpcr that should
796 * be used when a signal handler starts executing.
797 */
798 break;
799
800 case SSI_NVPAIRS: {
801 unsigned long v, w, i;
802 unsigned int old, new;
803
804 for (i = 0; i < nbytes; ++i) {
805
806 if (get_user(v, 2*i + (unsigned int __user *)buffer))
807 return -EFAULT;
808 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
809 return -EFAULT;
810 switch (v) {
811 case SSIN_UACPROC:
812 again:
813 old = current_thread_info()->flags;
814 new = old & ~(UAC_BITMASK << UAC_SHIFT);
815 new = new | (w & UAC_BITMASK) << UAC_SHIFT;
816 if (cmpxchg(&current_thread_info()->flags,
817 old, new) != old)
818 goto again;
819 break;
820
821 default:
822 return -EOPNOTSUPP;
823 }
824 }
825 return 0;
826 }
827
828 default:
829 break;
830 }
831
832 return -EOPNOTSUPP;
833 }
834
835 /* Translations due to the fact that OSF's time_t is an int. Which
836 affects all sorts of things, like timeval and itimerval. */
837
838 extern struct timezone sys_tz;
839 extern int do_adjtimex(struct timex *);
840
841 struct timeval32
842 {
843 int tv_sec, tv_usec;
844 };
845
846 struct itimerval32
847 {
848 struct timeval32 it_interval;
849 struct timeval32 it_value;
850 };
851
852 static inline long
853 get_tv32(struct timeval *o, struct timeval32 __user *i)
854 {
855 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
856 (__get_user(o->tv_sec, &i->tv_sec) |
857 __get_user(o->tv_usec, &i->tv_usec)));
858 }
859
860 static inline long
861 put_tv32(struct timeval32 __user *o, struct timeval *i)
862 {
863 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
864 (__put_user(i->tv_sec, &o->tv_sec) |
865 __put_user(i->tv_usec, &o->tv_usec)));
866 }
867
868 static inline long
869 get_it32(struct itimerval *o, struct itimerval32 __user *i)
870 {
871 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
872 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
873 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
874 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
875 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
876 }
877
878 static inline long
879 put_it32(struct itimerval32 __user *o, struct itimerval *i)
880 {
881 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
882 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
883 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
884 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
885 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
886 }
887
888 static inline void
889 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
890 {
891 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
892 value->tv_sec = jiffies / HZ;
893 }
894
895 asmlinkage int
896 osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
897 {
898 if (tv) {
899 struct timeval ktv;
900 do_gettimeofday(&ktv);
901 if (put_tv32(tv, &ktv))
902 return -EFAULT;
903 }
904 if (tz) {
905 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
906 return -EFAULT;
907 }
908 return 0;
909 }
910
911 asmlinkage int
912 osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
913 {
914 struct timespec kts;
915 struct timezone ktz;
916
917 if (tv) {
918 if (get_tv32((struct timeval *)&kts, tv))
919 return -EFAULT;
920 }
921 if (tz) {
922 if (copy_from_user(&ktz, tz, sizeof(*tz)))
923 return -EFAULT;
924 }
925
926 kts.tv_nsec *= 1000;
927
928 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
929 }
930
931 asmlinkage int
932 osf_getitimer(int which, struct itimerval32 __user *it)
933 {
934 struct itimerval kit;
935 int error;
936
937 error = do_getitimer(which, &kit);
938 if (!error && put_it32(it, &kit))
939 error = -EFAULT;
940
941 return error;
942 }
943
944 asmlinkage int
945 osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __user *out)
946 {
947 struct itimerval kin, kout;
948 int error;
949
950 if (in) {
951 if (get_it32(&kin, in))
952 return -EFAULT;
953 } else
954 memset(&kin, 0, sizeof(kin));
955
956 error = do_setitimer(which, &kin, out ? &kout : NULL);
957 if (error || !out)
958 return error;
959
960 if (put_it32(out, &kout))
961 return -EFAULT;
962
963 return 0;
964
965 }
966
967 asmlinkage int
968 osf_utimes(char __user *filename, struct timeval32 __user *tvs)
969 {
970 struct timeval ktvs[2];
971
972 if (tvs) {
973 if (get_tv32(&ktvs[0], &tvs[0]) ||
974 get_tv32(&ktvs[1], &tvs[1]))
975 return -EFAULT;
976 }
977
978 return do_utimes(filename, tvs ? ktvs : NULL);
979 }
980
981 #define MAX_SELECT_SECONDS \
982 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
983
984 asmlinkage int
985 osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
986 struct timeval32 __user *tvp)
987 {
988 fd_set_bits fds;
989 char *bits;
990 size_t size;
991 long timeout;
992 int ret = -EINVAL;
993
994 timeout = MAX_SCHEDULE_TIMEOUT;
995 if (tvp) {
996 time_t sec, usec;
997
998 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
999 || __get_user(sec, &tvp->tv_sec)
1000 || __get_user(usec, &tvp->tv_usec)) {
1001 ret = -EFAULT;
1002 goto out_nofds;
1003 }
1004
1005 if (sec < 0 || usec < 0)
1006 goto out_nofds;
1007
1008 if ((unsigned long) sec < MAX_SELECT_SECONDS) {
1009 timeout = (usec + 1000000/HZ - 1) / (1000000/HZ);
1010 timeout += sec * (unsigned long) HZ;
1011 }
1012 }
1013
1014 if (n < 0 || n > current->files->max_fdset)
1015 goto out_nofds;
1016
1017 /*
1018 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1019 * since we used fdset we need to allocate memory in units of
1020 * long-words.
1021 */
1022 ret = -ENOMEM;
1023 size = FDS_BYTES(n);
1024 bits = kmalloc(6 * size, GFP_KERNEL);
1025 if (!bits)
1026 goto out_nofds;
1027 fds.in = (unsigned long *) bits;
1028 fds.out = (unsigned long *) (bits + size);
1029 fds.ex = (unsigned long *) (bits + 2*size);
1030 fds.res_in = (unsigned long *) (bits + 3*size);
1031 fds.res_out = (unsigned long *) (bits + 4*size);
1032 fds.res_ex = (unsigned long *) (bits + 5*size);
1033
1034 if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) ||
1035 (ret = get_fd_set(n, outp->fds_bits, fds.out)) ||
1036 (ret = get_fd_set(n, exp->fds_bits, fds.ex)))
1037 goto out;
1038 zero_fd_set(n, fds.res_in);
1039 zero_fd_set(n, fds.res_out);
1040 zero_fd_set(n, fds.res_ex);
1041
1042 ret = do_select(n, &fds, &timeout);
1043
1044 /* OSF does not copy back the remaining time. */
1045
1046 if (ret < 0)
1047 goto out;
1048 if (!ret) {
1049 ret = -ERESTARTNOHAND;
1050 if (signal_pending(current))
1051 goto out;
1052 ret = 0;
1053 }
1054
1055 if (set_fd_set(n, inp->fds_bits, fds.res_in) ||
1056 set_fd_set(n, outp->fds_bits, fds.res_out) ||
1057 set_fd_set(n, exp->fds_bits, fds.res_ex))
1058 ret = -EFAULT;
1059
1060 out:
1061 kfree(bits);
1062 out_nofds:
1063 return ret;
1064 }
1065
1066 struct rusage32 {
1067 struct timeval32 ru_utime; /* user time used */
1068 struct timeval32 ru_stime; /* system time used */
1069 long ru_maxrss; /* maximum resident set size */
1070 long ru_ixrss; /* integral shared memory size */
1071 long ru_idrss; /* integral unshared data size */
1072 long ru_isrss; /* integral unshared stack size */
1073 long ru_minflt; /* page reclaims */
1074 long ru_majflt; /* page faults */
1075 long ru_nswap; /* swaps */
1076 long ru_inblock; /* block input operations */
1077 long ru_oublock; /* block output operations */
1078 long ru_msgsnd; /* messages sent */
1079 long ru_msgrcv; /* messages received */
1080 long ru_nsignals; /* signals received */
1081 long ru_nvcsw; /* voluntary context switches */
1082 long ru_nivcsw; /* involuntary " */
1083 };
1084
1085 asmlinkage int
1086 osf_getrusage(int who, struct rusage32 __user *ru)
1087 {
1088 struct rusage32 r;
1089
1090 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1091 return -EINVAL;
1092
1093 memset(&r, 0, sizeof(r));
1094 switch (who) {
1095 case RUSAGE_SELF:
1096 jiffies_to_timeval32(current->utime, &r.ru_utime);
1097 jiffies_to_timeval32(current->stime, &r.ru_stime);
1098 r.ru_minflt = current->min_flt;
1099 r.ru_majflt = current->maj_flt;
1100 break;
1101 case RUSAGE_CHILDREN:
1102 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1103 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1104 r.ru_minflt = current->signal->cmin_flt;
1105 r.ru_majflt = current->signal->cmaj_flt;
1106 break;
1107 }
1108
1109 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1110 }
1111
1112 asmlinkage long
1113 osf_wait4(pid_t pid, int __user *ustatus, int options,
1114 struct rusage32 __user *ur)
1115 {
1116 struct rusage r;
1117 long ret, err;
1118 mm_segment_t old_fs;
1119
1120 if (!ur)
1121 return sys_wait4(pid, ustatus, options, NULL);
1122
1123 old_fs = get_fs();
1124
1125 set_fs (KERNEL_DS);
1126 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r);
1127 set_fs (old_fs);
1128
1129 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1130 return -EFAULT;
1131
1132 err = 0;
1133 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1134 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1135 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1136 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1137 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1138 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1139 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1140 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1141 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1142 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1143 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1144 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1145 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1146 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1147 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1148 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1149 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1150 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1151
1152 return err ? err : ret;
1153 }
1154
1155 /*
1156 * I don't know what the parameters are: the first one
1157 * seems to be a timeval pointer, and I suspect the second
1158 * one is the time remaining.. Ho humm.. No documentation.
1159 */
1160 asmlinkage int
1161 osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain)
1162 {
1163 struct timeval tmp;
1164 unsigned long ticks;
1165
1166 if (get_tv32(&tmp, sleep))
1167 goto fault;
1168
1169 ticks = tmp.tv_usec;
1170 ticks = (ticks + (1000000 / HZ) - 1) / (1000000 / HZ);
1171 ticks += tmp.tv_sec * HZ;
1172
1173 current->state = TASK_INTERRUPTIBLE;
1174 ticks = schedule_timeout(ticks);
1175
1176 if (remain) {
1177 tmp.tv_sec = ticks / HZ;
1178 tmp.tv_usec = ticks % HZ;
1179 if (put_tv32(remain, &tmp))
1180 goto fault;
1181 }
1182
1183 return 0;
1184 fault:
1185 return -EFAULT;
1186 }
1187
1188
1189 struct timex32 {
1190 unsigned int modes; /* mode selector */
1191 long offset; /* time offset (usec) */
1192 long freq; /* frequency offset (scaled ppm) */
1193 long maxerror; /* maximum error (usec) */
1194 long esterror; /* estimated error (usec) */
1195 int status; /* clock command/status */
1196 long constant; /* pll time constant */
1197 long precision; /* clock precision (usec) (read only) */
1198 long tolerance; /* clock frequency tolerance (ppm)
1199 * (read only)
1200 */
1201 struct timeval32 time; /* (read only) */
1202 long tick; /* (modified) usecs between clock ticks */
1203
1204 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1205 long jitter; /* pps jitter (us) (ro) */
1206 int shift; /* interval duration (s) (shift) (ro) */
1207 long stabil; /* pps stability (scaled ppm) (ro) */
1208 long jitcnt; /* jitter limit exceeded (ro) */
1209 long calcnt; /* calibration intervals (ro) */
1210 long errcnt; /* calibration errors (ro) */
1211 long stbcnt; /* stability limit exceeded (ro) */
1212
1213 int :32; int :32; int :32; int :32;
1214 int :32; int :32; int :32; int :32;
1215 int :32; int :32; int :32; int :32;
1216 };
1217
1218 asmlinkage int
1219 sys_old_adjtimex(struct timex32 __user *txc_p)
1220 {
1221 struct timex txc;
1222 int ret;
1223
1224 /* copy relevant bits of struct timex. */
1225 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1226 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1227 offsetof(struct timex32, time)))
1228 return -EFAULT;
1229
1230 ret = do_adjtimex(&txc);
1231 if (ret < 0)
1232 return ret;
1233
1234 /* copy back to timex32 */
1235 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1236 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1237 offsetof(struct timex32, tick))) ||
1238 (put_tv32(&txc_p->time, &txc.time)))
1239 return -EFAULT;
1240
1241 return ret;
1242 }
1243
1244 /* Get an address range which is currently unmapped. Similar to the
1245 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1246
1247 static unsigned long
1248 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1249 unsigned long limit)
1250 {
1251 struct vm_area_struct *vma = find_vma(current->mm, addr);
1252
1253 while (1) {
1254 /* At this point: (!vma || addr < vma->vm_end). */
1255 if (limit - len < addr)
1256 return -ENOMEM;
1257 if (!vma || addr + len <= vma->vm_start)
1258 return addr;
1259 addr = vma->vm_end;
1260 vma = vma->vm_next;
1261 }
1262 }
1263
1264 unsigned long
1265 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1266 unsigned long len, unsigned long pgoff,
1267 unsigned long flags)
1268 {
1269 unsigned long limit;
1270
1271 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1272 if (current->personality & ADDR_LIMIT_32BIT)
1273 limit = 0x80000000;
1274 else
1275 limit = TASK_SIZE;
1276
1277 if (len > limit)
1278 return -ENOMEM;
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