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[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / arch / alpha / kernel / osf_sys.c
blob167fd89f8707aeb1b0ad59190e9fa352718d5900
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 /*
461 * The following stuff should move into a header file should it ever
462 * be labeled "officially supported." Right now, there is just enough
463 * support to avoid applications (such as tar) printing error
464 * messages. The attributes are not really implemented.
465 */
466
467 /*
468 * Values for Property list entry flag
469 */
470 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
471 by default */
472 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
473 #define PLE_FLAG_ALL -1 /* All flag value */
474
475 struct proplistname_args {
476 unsigned int pl_mask;
477 unsigned int pl_numnames;
478 char **pl_names;
479 };
480
481 union pl_args {
482 struct setargs {
483 char __user *path;
484 long follow;
485 long nbytes;
486 char __user *buf;
487 } set;
488 struct fsetargs {
489 long fd;
490 long nbytes;
491 char __user *buf;
492 } fset;
493 struct getargs {
494 char __user *path;
495 long follow;
496 struct proplistname_args __user *name_args;
497 long nbytes;
498 char __user *buf;
499 int __user *min_buf_size;
500 } get;
501 struct fgetargs {
502 long fd;
503 struct proplistname_args __user *name_args;
504 long nbytes;
505 char __user *buf;
506 int __user *min_buf_size;
507 } fget;
508 struct delargs {
509 char __user *path;
510 long follow;
511 struct proplistname_args __user *name_args;
512 } del;
513 struct fdelargs {
514 long fd;
515 struct proplistname_args __user *name_args;
516 } fdel;
517 };
518
519 enum pl_code {
520 PL_SET = 1, PL_FSET = 2,
521 PL_GET = 3, PL_FGET = 4,
522 PL_DEL = 5, PL_FDEL = 6
523 };
524
525 asmlinkage long
526 osf_proplist_syscall(enum pl_code code, union pl_args __user *args)
527 {
528 long error;
529 int __user *min_buf_size_ptr;
530
531 lock_kernel();
532 switch (code) {
533 case PL_SET:
534 if (get_user(error, &args->set.nbytes))
535 error = -EFAULT;
536 break;
537 case PL_FSET:
538 if (get_user(error, &args->fset.nbytes))
539 error = -EFAULT;
540 break;
541 case PL_GET:
542 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
543 if (error)
544 break;
545 error = put_user(0, min_buf_size_ptr);
546 break;
547 case PL_FGET:
548 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
549 if (error)
550 break;
551 error = put_user(0, min_buf_size_ptr);
552 break;
553 case PL_DEL:
554 case PL_FDEL:
555 error = 0;
556 break;
557 default:
558 error = -EOPNOTSUPP;
559 break;
560 };
561 unlock_kernel();
562 return error;
563 }
564
565 asmlinkage int
566 osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss)
567 {
568 unsigned long usp = rdusp();
569 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
570 unsigned long oss_os = on_sig_stack(usp);
571 int error;
572
573 if (uss) {
574 void __user *ss_sp;
575
576 error = -EFAULT;
577 if (get_user(ss_sp, &uss->ss_sp))
578 goto out;
579
580 /* If the current stack was set with sigaltstack, don't
581 swap stacks while we are on it. */
582 error = -EPERM;
583 if (current->sas_ss_sp && on_sig_stack(usp))
584 goto out;
585
586 /* Since we don't know the extent of the stack, and we don't
587 track onstack-ness, but rather calculate it, we must
588 presume a size. Ho hum this interface is lossy. */
589 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
590 current->sas_ss_size = SIGSTKSZ;
591 }
592
593 if (uoss) {
594 error = -EFAULT;
595 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
596 || __put_user(oss_sp, &uoss->ss_sp)
597 || __put_user(oss_os, &uoss->ss_onstack))
598 goto out;
599 }
600
601 error = 0;
602 out:
603 return error;
604 }
605
606 asmlinkage long
607 osf_sysinfo(int command, char __user *buf, long count)
608 {
609 static char * sysinfo_table[] = {
610 system_utsname.sysname,
611 system_utsname.nodename,
612 system_utsname.release,
613 system_utsname.version,
614 system_utsname.machine,
615 "alpha", /* instruction set architecture */
616 "dummy", /* hardware serial number */
617 "dummy", /* hardware manufacturer */
618 "dummy", /* secure RPC domain */
619 };
620 unsigned long offset;
621 char *res;
622 long len, err = -EINVAL;
623
624 offset = command-1;
625 if (offset >= sizeof(sysinfo_table)/sizeof(char *)) {
626 /* Digital UNIX has a few unpublished interfaces here */
627 printk("sysinfo(%d)", command);
628 goto out;
629 }
630
631 down_read(&uts_sem);
632 res = sysinfo_table[offset];
633 len = strlen(res)+1;
634 if (len > count)
635 len = count;
636 if (copy_to_user(buf, res, len))
637 err = -EFAULT;
638 else
639 err = 0;
640 up_read(&uts_sem);
641 out:
642 return err;
643 }
644
645 asmlinkage unsigned long
646 osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes,
647 int __user *start, void __user *arg)
648 {
649 unsigned long w;
650 struct percpu_struct *cpu;
651
652 switch (op) {
653 case GSI_IEEE_FP_CONTROL:
654 /* Return current software fp control & status bits. */
655 /* Note that DU doesn't verify available space here. */
656
657 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
658 w = swcr_update_status(w, rdfpcr());
659 if (put_user(w, (unsigned long __user *) buffer))
660 return -EFAULT;
661 return 0;
662
663 case GSI_IEEE_STATE_AT_SIGNAL:
664 /*
665 * Not sure anybody will ever use this weird stuff. These
666 * ops can be used (under OSF/1) to set the fpcr that should
667 * be used when a signal handler starts executing.
668 */
669 break;
670
671 case GSI_UACPROC:
672 if (nbytes < sizeof(unsigned int))
673 return -EINVAL;
674 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK;
675 if (put_user(w, (unsigned int __user *)buffer))
676 return -EFAULT;
677 return 1;
678
679 case GSI_PROC_TYPE:
680 if (nbytes < sizeof(unsigned long))
681 return -EINVAL;
682 cpu = (struct percpu_struct*)
683 ((char*)hwrpb + hwrpb->processor_offset);
684 w = cpu->type;
685 if (put_user(w, (unsigned long __user*)buffer))
686 return -EFAULT;
687 return 1;
688
689 case GSI_GET_HWRPB:
690 if (nbytes < sizeof(*hwrpb))
691 return -EINVAL;
692 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
693 return -EFAULT;
694 return 1;
695
696 default:
697 break;
698 }
699
700 return -EOPNOTSUPP;
701 }
702
703 asmlinkage unsigned long
704 osf_setsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes,
705 int __user *start, void __user *arg)
706 {
707 switch (op) {
708 case SSI_IEEE_FP_CONTROL: {
709 unsigned long swcr, fpcr;
710 unsigned int *state;
711
712 /*
713 * Alpha Architecture Handbook 4.7.7.3:
714 * To be fully IEEE compiant, we must track the current IEEE
715 * exception state in software, because spurrious bits can be
716 * set in the trap shadow of a software-complete insn.
717 */
718
719 if (get_user(swcr, (unsigned long __user *)buffer))
720 return -EFAULT;
721 state = &current_thread_info()->ieee_state;
722
723 /* Update softare trap enable bits. */
724 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
725
726 /* Update the real fpcr. */
727 fpcr = rdfpcr() & FPCR_DYN_MASK;
728 fpcr |= ieee_swcr_to_fpcr(swcr);
729 wrfpcr(fpcr);
730
731 return 0;
732 }
733
734 case SSI_IEEE_RAISE_EXCEPTION: {
735 unsigned long exc, swcr, fpcr, fex;
736 unsigned int *state;
737
738 if (get_user(exc, (unsigned long __user *)buffer))
739 return -EFAULT;
740 state = &current_thread_info()->ieee_state;
741 exc &= IEEE_STATUS_MASK;
742
743 /* Update softare trap enable bits. */
744 swcr = (*state & IEEE_SW_MASK) | exc;
745 *state |= exc;
746
747 /* Update the real fpcr. */
748 fpcr = rdfpcr();
749 fpcr |= ieee_swcr_to_fpcr(swcr);
750 wrfpcr(fpcr);
751
752 /* If any exceptions set by this call, and are unmasked,
753 send a signal. Old exceptions are not signaled. */
754 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
755 if (fex) {
756 siginfo_t info;
757 int si_code = 0;
758
759 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
760 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
761 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
762 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
763 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
764 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
765
766 info.si_signo = SIGFPE;
767 info.si_errno = 0;
768 info.si_code = si_code;
769 info.si_addr = NULL; /* FIXME */
770 send_sig_info(SIGFPE, &info, current);
771 }
772 return 0;
773 }
774
775 case SSI_IEEE_STATE_AT_SIGNAL:
776 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
777 /*
778 * Not sure anybody will ever use this weird stuff. These
779 * ops can be used (under OSF/1) to set the fpcr that should
780 * be used when a signal handler starts executing.
781 */
782 break;
783
784 case SSI_NVPAIRS: {
785 unsigned long v, w, i;
786 unsigned int old, new;
787
788 for (i = 0; i < nbytes; ++i) {
789
790 if (get_user(v, 2*i + (unsigned int __user *)buffer))
791 return -EFAULT;
792 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
793 return -EFAULT;
794 switch (v) {
795 case SSIN_UACPROC:
796 again:
797 old = current_thread_info()->flags;
798 new = old & ~(UAC_BITMASK << UAC_SHIFT);
799 new = new | (w & UAC_BITMASK) << UAC_SHIFT;
800 if (cmpxchg(&current_thread_info()->flags,
801 old, new) != old)
802 goto again;
803 break;
804
805 default:
806 return -EOPNOTSUPP;
807 }
808 }
809 return 0;
810 }
811
812 default:
813 break;
814 }
815
816 return -EOPNOTSUPP;
817 }
818
819 /* Translations due to the fact that OSF's time_t is an int. Which
820 affects all sorts of things, like timeval and itimerval. */
821
822 extern struct timezone sys_tz;
823 extern int do_adjtimex(struct timex *);
824
825 struct timeval32
826 {
827 int tv_sec, tv_usec;
828 };
829
830 struct itimerval32
831 {
832 struct timeval32 it_interval;
833 struct timeval32 it_value;
834 };
835
836 static inline long
837 get_tv32(struct timeval *o, struct timeval32 __user *i)
838 {
839 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
840 (__get_user(o->tv_sec, &i->tv_sec) |
841 __get_user(o->tv_usec, &i->tv_usec)));
842 }
843
844 static inline long
845 put_tv32(struct timeval32 __user *o, struct timeval *i)
846 {
847 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
848 (__put_user(i->tv_sec, &o->tv_sec) |
849 __put_user(i->tv_usec, &o->tv_usec)));
850 }
851
852 static inline long
853 get_it32(struct itimerval *o, struct itimerval32 __user *i)
854 {
855 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
856 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
857 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
858 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
859 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
860 }
861
862 static inline long
863 put_it32(struct itimerval32 __user *o, struct itimerval *i)
864 {
865 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
866 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
867 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
868 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
869 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
870 }
871
872 static inline void
873 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
874 {
875 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
876 value->tv_sec = jiffies / HZ;
877 }
878
879 asmlinkage int
880 osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
881 {
882 if (tv) {
883 struct timeval ktv;
884 do_gettimeofday(&ktv);
885 if (put_tv32(tv, &ktv))
886 return -EFAULT;
887 }
888 if (tz) {
889 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
890 return -EFAULT;
891 }
892 return 0;
893 }
894
895 asmlinkage int
896 osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz)
897 {
898 struct timespec kts;
899 struct timezone ktz;
900
901 if (tv) {
902 if (get_tv32((struct timeval *)&kts, tv))
903 return -EFAULT;
904 }
905 if (tz) {
906 if (copy_from_user(&ktz, tz, sizeof(*tz)))
907 return -EFAULT;
908 }
909
910 kts.tv_nsec *= 1000;
911
912 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
913 }
914
915 asmlinkage int
916 osf_getitimer(int which, struct itimerval32 __user *it)
917 {
918 struct itimerval kit;
919 int error;
920
921 error = do_getitimer(which, &kit);
922 if (!error && put_it32(it, &kit))
923 error = -EFAULT;
924
925 return error;
926 }
927
928 asmlinkage int
929 osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __user *out)
930 {
931 struct itimerval kin, kout;
932 int error;
933
934 if (in) {
935 if (get_it32(&kin, in))
936 return -EFAULT;
937 } else
938 memset(&kin, 0, sizeof(kin));
939
940 error = do_setitimer(which, &kin, out ? &kout : NULL);
941 if (error || !out)
942 return error;
943
944 if (put_it32(out, &kout))
945 return -EFAULT;
946
947 return 0;
948
949 }
950
951 asmlinkage int
952 osf_utimes(char __user *filename, struct timeval32 __user *tvs)
953 {
954 struct timeval ktvs[2];
955
956 if (tvs) {
957 if (get_tv32(&ktvs[0], &tvs[0]) ||
958 get_tv32(&ktvs[1], &tvs[1]))
959 return -EFAULT;
960 }
961
962 return do_utimes(filename, tvs ? ktvs : NULL);
963 }
964
965 #define MAX_SELECT_SECONDS \
966 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
967
968 asmlinkage int
969 osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
970 struct timeval32 __user *tvp)
971 {
972 fd_set_bits fds;
973 char *bits;
974 size_t size;
975 long timeout;
976 int ret = -EINVAL;
977
978 timeout = MAX_SCHEDULE_TIMEOUT;
979 if (tvp) {
980 time_t sec, usec;
981
982 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
983 || __get_user(sec, &tvp->tv_sec)
984 || __get_user(usec, &tvp->tv_usec)) {
985 ret = -EFAULT;
986 goto out_nofds;
987 }
988
989 if (sec < 0 || usec < 0)
990 goto out_nofds;
991
992 if ((unsigned long) sec < MAX_SELECT_SECONDS) {
993 timeout = (usec + 1000000/HZ - 1) / (1000000/HZ);
994 timeout += sec * (unsigned long) HZ;
995 }
996 }
997
998 if (n < 0 || n > current->files->max_fdset)
999 goto out_nofds;
1000
1001 /*
1002 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1003 * since we used fdset we need to allocate memory in units of
1004 * long-words.
1005 */
1006 ret = -ENOMEM;
1007 size = FDS_BYTES(n);
1008 bits = kmalloc(6 * size, GFP_KERNEL);
1009 if (!bits)
1010 goto out_nofds;
1011 fds.in = (unsigned long *) bits;
1012 fds.out = (unsigned long *) (bits + size);
1013 fds.ex = (unsigned long *) (bits + 2*size);
1014 fds.res_in = (unsigned long *) (bits + 3*size);
1015 fds.res_out = (unsigned long *) (bits + 4*size);
1016 fds.res_ex = (unsigned long *) (bits + 5*size);
1017
1018 if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) ||
1019 (ret = get_fd_set(n, outp->fds_bits, fds.out)) ||
1020 (ret = get_fd_set(n, exp->fds_bits, fds.ex)))
1021 goto out;
1022 zero_fd_set(n, fds.res_in);
1023 zero_fd_set(n, fds.res_out);
1024 zero_fd_set(n, fds.res_ex);
1025
1026 ret = do_select(n, &fds, &timeout);
1027
1028 /* OSF does not copy back the remaining time. */
1029
1030 if (ret < 0)
1031 goto out;
1032 if (!ret) {
1033 ret = -ERESTARTNOHAND;
1034 if (signal_pending(current))
1035 goto out;
1036 ret = 0;
1037 }
1038
1039 if (set_fd_set(n, inp->fds_bits, fds.res_in) ||
1040 set_fd_set(n, outp->fds_bits, fds.res_out) ||
1041 set_fd_set(n, exp->fds_bits, fds.res_ex))
1042 ret = -EFAULT;
1043
1044 out:
1045 kfree(bits);
1046 out_nofds:
1047 return ret;
1048 }
1049
1050 struct rusage32 {
1051 struct timeval32 ru_utime; /* user time used */
1052 struct timeval32 ru_stime; /* system time used */
1053 long ru_maxrss; /* maximum resident set size */
1054 long ru_ixrss; /* integral shared memory size */
1055 long ru_idrss; /* integral unshared data size */
1056 long ru_isrss; /* integral unshared stack size */
1057 long ru_minflt; /* page reclaims */
1058 long ru_majflt; /* page faults */
1059 long ru_nswap; /* swaps */
1060 long ru_inblock; /* block input operations */
1061 long ru_oublock; /* block output operations */
1062 long ru_msgsnd; /* messages sent */
1063 long ru_msgrcv; /* messages received */
1064 long ru_nsignals; /* signals received */
1065 long ru_nvcsw; /* voluntary context switches */
1066 long ru_nivcsw; /* involuntary " */
1067 };
1068
1069 asmlinkage int
1070 osf_getrusage(int who, struct rusage32 __user *ru)
1071 {
1072 struct rusage32 r;
1073
1074 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1075 return -EINVAL;
1076
1077 memset(&r, 0, sizeof(r));
1078 switch (who) {
1079 case RUSAGE_SELF:
1080 jiffies_to_timeval32(current->utime, &r.ru_utime);
1081 jiffies_to_timeval32(current->stime, &r.ru_stime);
1082 r.ru_minflt = current->min_flt;
1083 r.ru_majflt = current->maj_flt;
1084 break;
1085 case RUSAGE_CHILDREN:
1086 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1087 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1088 r.ru_minflt = current->signal->cmin_flt;
1089 r.ru_majflt = current->signal->cmaj_flt;
1090 break;
1091 }
1092
1093 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1094 }
1095
1096 asmlinkage long
1097 osf_wait4(pid_t pid, int __user *ustatus, int options,
1098 struct rusage32 __user *ur)
1099 {
1100 struct rusage r;
1101 long ret, err;
1102 mm_segment_t old_fs;
1103
1104 if (!ur)
1105 return sys_wait4(pid, ustatus, options, NULL);
1106
1107 old_fs = get_fs();
1108
1109 set_fs (KERNEL_DS);
1110 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r);
1111 set_fs (old_fs);
1112
1113 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1114 return -EFAULT;
1115
1116 err = 0;
1117 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1118 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1119 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1120 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1121 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1122 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1123 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1124 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1125 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1126 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1127 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1128 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1129 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1130 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1131 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1132 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1133 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1134 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1135
1136 return err ? err : ret;
1137 }
1138
1139 /*
1140 * I don't know what the parameters are: the first one
1141 * seems to be a timeval pointer, and I suspect the second
1142 * one is the time remaining.. Ho humm.. No documentation.
1143 */
1144 asmlinkage int
1145 osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain)
1146 {
1147 struct timeval tmp;
1148 unsigned long ticks;
1149
1150 if (get_tv32(&tmp, sleep))
1151 goto fault;
1152
1153 ticks = timeval_to_jiffies(&tmp);
1154
1155 current->state = TASK_INTERRUPTIBLE;
1156 ticks = schedule_timeout(ticks);
1157
1158 if (remain) {
1159 jiffies_to_timeval(ticks, &tmp);
1160 if (put_tv32(remain, &tmp))
1161 goto fault;
1162 }
1163
1164 return 0;
1165 fault:
1166 return -EFAULT;
1167 }
1168
1169
1170 struct timex32 {
1171 unsigned int modes; /* mode selector */
1172 long offset; /* time offset (usec) */
1173 long freq; /* frequency offset (scaled ppm) */
1174 long maxerror; /* maximum error (usec) */
1175 long esterror; /* estimated error (usec) */
1176 int status; /* clock command/status */
1177 long constant; /* pll time constant */
1178 long precision; /* clock precision (usec) (read only) */
1179 long tolerance; /* clock frequency tolerance (ppm)
1180 * (read only)
1181 */
1182 struct timeval32 time; /* (read only) */
1183 long tick; /* (modified) usecs between clock ticks */
1184
1185 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1186 long jitter; /* pps jitter (us) (ro) */
1187 int shift; /* interval duration (s) (shift) (ro) */
1188 long stabil; /* pps stability (scaled ppm) (ro) */
1189 long jitcnt; /* jitter limit exceeded (ro) */
1190 long calcnt; /* calibration intervals (ro) */
1191 long errcnt; /* calibration errors (ro) */
1192 long stbcnt; /* stability limit exceeded (ro) */
1193
1194 int :32; int :32; int :32; int :32;
1195 int :32; int :32; int :32; int :32;
1196 int :32; int :32; int :32; int :32;
1197 };
1198
1199 asmlinkage int
1200 sys_old_adjtimex(struct timex32 __user *txc_p)
1201 {
1202 struct timex txc;
1203 int ret;
1204
1205 /* copy relevant bits of struct timex. */
1206 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1207 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1208 offsetof(struct timex32, time)))
1209 return -EFAULT;
1210
1211 ret = do_adjtimex(&txc);
1212 if (ret < 0)
1213 return ret;
1214
1215 /* copy back to timex32 */
1216 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1217 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1218 offsetof(struct timex32, tick))) ||
1219 (put_tv32(&txc_p->time, &txc.time)))
1220 return -EFAULT;
1221
1222 return ret;
1223 }
1224
1225 /* Get an address range which is currently unmapped. Similar to the
1226 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1227
1228 static unsigned long
1229 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1230 unsigned long limit)
1231 {
1232 struct vm_area_struct *vma = find_vma(current->mm, addr);
1233
1234 while (1) {
1235 /* At this point: (!vma || addr < vma->vm_end). */
1236 if (limit - len < addr)
1237 return -ENOMEM;
1238 if (!vma || addr + len <= vma->vm_start)
1239 return addr;
1240 addr = vma->vm_end;
1241 vma = vma->vm_next;
1242 }
1243 }
1244
1245 unsigned long
1246 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1247 unsigned long len, unsigned long pgoff,
1248 unsigned long flags)
1249 {
1250 unsigned long limit;
1251
1252 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1253 if (current->personality & ADDR_LIMIT_32BIT)
1254 limit = 0x80000000;
1255 else
1256 limit = TASK_SIZE;
1257
1258 if (len > limit)
1259 return -ENOMEM;
1260
1261 /* First, see if the given suggestion fits.
1262
1263 The OSF/1 loader (/sbin/loader) relies on us returning an
1264 address larger than the requested if one exists, which is
1265 a terribly broken way to program.
1266
1267 That said, I can see the use in being able to suggest not
1268 merely specific addresses, but regions of memory -- perhaps
1269 this feature should be incorporated into all ports? */
1270
1271 if (addr) {
1272 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1273 if (addr != (unsigned long) -ENOMEM)
1274 return addr;
1275 }
1276
1277 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1278 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1279 len, limit);
1280 if (addr != (unsigned long) -ENOMEM)
1281 return addr;
1282
1283 /* Finally, try allocating in low memory. */
1284 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1285
1286 return addr;
1287 }
1288
1289 #ifdef CONFIG_OSF4_COMPAT
1290
1291 /* Clear top 32 bits of iov_len in the user's buffer for
1292 compatibility with old versions of OSF/1 where iov_len
1293 was defined as int. */
1294 static int
1295 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1296 {
1297 unsigned long i;
1298
1299 for (i = 0 ; i < count ; i++) {
1300 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1301
1302 if (put_user(0, iov_len_high))
1303 return -EFAULT;
1304 }
1305 return 0;
1306 }
1307
1308 asmlinkage ssize_t
1309 osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long count)
1310 {
1311 if (unlikely(personality(current->personality) == PER_OSF4))
1312 if (osf_fix_iov_len(vector, count))
1313 return -EFAULT;
1314 return sys_readv(fd, vector, count);
1315 }
1316
1317 asmlinkage ssize_t
1318 osf_writev(unsigned long fd, const struct iovec __user * vector, unsigned long count)
1319 {
1320 if (unlikely(personality(current->personality) == PER_OSF4))
1321 if (osf_fix_iov_len(vector, count))
1322 return -EFAULT;
1323 return sys_writev(fd, vector, count);
1324 }
1325
1326 #endif
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