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spi-topcliff-pch: Fix issue for transmitting over 4KByte
[zen-stable.git] / arch / alpha / kernel / osf_sys.c
blob01e8715e26d9306148a8706d046cf863015c1721
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/stddef.h>
19 #include <linux/syscalls.h>
20 #include <linux/unistd.h>
21 #include <linux/ptrace.h>
22 #include <linux/user.h>
23 #include <linux/utsname.h>
24 #include <linux/time.h>
25 #include <linux/timex.h>
26 #include <linux/major.h>
27 #include <linux/stat.h>
28 #include <linux/mman.h>
29 #include <linux/shm.h>
30 #include <linux/poll.h>
31 #include <linux/file.h>
32 #include <linux/types.h>
33 #include <linux/ipc.h>
34 #include <linux/namei.h>
35 #include <linux/uio.h>
36 #include <linux/vfs.h>
37 #include <linux/rcupdate.h>
38 #include <linux/slab.h>
39
40 #include <asm/fpu.h>
41 #include <asm/io.h>
42 #include <asm/uaccess.h>
43 #include <asm/system.h>
44 #include <asm/sysinfo.h>
45 #include <asm/thread_info.h>
46 #include <asm/hwrpb.h>
47 #include <asm/processor.h>
48
49 /*
50 * Brk needs to return an error. Still support Linux's brk(0) query idiom,
51 * which OSF programs just shouldn't be doing. We're still not quite
52 * identical to OSF as we don't return 0 on success, but doing otherwise
53 * would require changes to libc. Hopefully this is good enough.
54 */
55 SYSCALL_DEFINE1(osf_brk, unsigned long, brk)
56 {
57 unsigned long retval = sys_brk(brk);
58 if (brk && brk != retval)
59 retval = -ENOMEM;
60 return retval;
61 }
62
63 /*
64 * This is pure guess-work..
65 */
66 SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start,
67 unsigned long, text_len, unsigned long, bss_start,
68 unsigned long, bss_len)
69 {
70 struct mm_struct *mm;
71
72 mm = current->mm;
73 mm->end_code = bss_start + bss_len;
74 mm->start_brk = bss_start + bss_len;
75 mm->brk = bss_start + bss_len;
76 #if 0
77 printk("set_program_attributes(%lx %lx %lx %lx)\n",
78 text_start, text_len, bss_start, bss_len);
79 #endif
80 return 0;
81 }
82
83 /*
84 * OSF/1 directory handling functions...
85 *
86 * The "getdents()" interface is much more sane: the "basep" stuff is
87 * braindamage (it can't really handle filesystems where the directory
88 * offset differences aren't the same as "d_reclen").
89 */
90 #define NAME_OFFSET offsetof (struct osf_dirent, d_name)
91
92 struct osf_dirent {
93 unsigned int d_ino;
94 unsigned short d_reclen;
95 unsigned short d_namlen;
96 char d_name[1];
97 };
98
99 struct osf_dirent_callback {
100 struct osf_dirent __user *dirent;
101 long __user *basep;
102 unsigned int count;
103 int error;
104 };
105
106 static int
107 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset,
108 u64 ino, unsigned int d_type)
109 {
110 struct osf_dirent __user *dirent;
111 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf;
112 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
113 unsigned int d_ino;
114
115 buf->error = -EINVAL; /* only used if we fail */
116 if (reclen > buf->count)
117 return -EINVAL;
118 d_ino = ino;
119 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
120 buf->error = -EOVERFLOW;
121 return -EOVERFLOW;
122 }
123 if (buf->basep) {
124 if (put_user(offset, buf->basep))
125 goto Efault;
126 buf->basep = NULL;
127 }
128 dirent = buf->dirent;
129 if (put_user(d_ino, &dirent->d_ino) ||
130 put_user(namlen, &dirent->d_namlen) ||
131 put_user(reclen, &dirent->d_reclen) ||
132 copy_to_user(dirent->d_name, name, namlen) ||
133 put_user(0, dirent->d_name + namlen))
134 goto Efault;
135 dirent = (void __user *)dirent + reclen;
136 buf->dirent = dirent;
137 buf->count -= reclen;
138 return 0;
139 Efault:
140 buf->error = -EFAULT;
141 return -EFAULT;
142 }
143
144 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
145 struct osf_dirent __user *, dirent, unsigned int, count,
146 long __user *, basep)
147 {
148 int error;
149 struct file *file;
150 struct osf_dirent_callback buf;
151
152 error = -EBADF;
153 file = fget(fd);
154 if (!file)
155 goto out;
156
157 buf.dirent = dirent;
158 buf.basep = basep;
159 buf.count = count;
160 buf.error = 0;
161
162 error = vfs_readdir(file, osf_filldir, &buf);
163 if (error >= 0)
164 error = buf.error;
165 if (count != buf.count)
166 error = count - buf.count;
167
168 fput(file);
169 out:
170 return error;
171 }
172
173 #undef NAME_OFFSET
174
175 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
176 unsigned long, prot, unsigned long, flags, unsigned long, fd,
177 unsigned long, off)
178 {
179 unsigned long ret = -EINVAL;
180
181 #if 0
182 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
183 printk("%s: unimplemented OSF mmap flags %04lx\n",
184 current->comm, flags);
185 #endif
186 if ((off + PAGE_ALIGN(len)) < off)
187 goto out;
188 if (off & ~PAGE_MASK)
189 goto out;
190 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
191 out:
192 return ret;
193 }
194
195
196 /*
197 * The OSF/1 statfs structure is much larger, but this should
198 * match the beginning, at least.
199 */
200 struct osf_statfs {
201 short f_type;
202 short f_flags;
203 int f_fsize;
204 int f_bsize;
205 int f_blocks;
206 int f_bfree;
207 int f_bavail;
208 int f_files;
209 int f_ffree;
210 __kernel_fsid_t f_fsid;
211 };
212
213 static int
214 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
215 unsigned long bufsiz)
216 {
217 struct osf_statfs tmp_stat;
218
219 tmp_stat.f_type = linux_stat->f_type;
220 tmp_stat.f_flags = 0; /* mount flags */
221 tmp_stat.f_fsize = linux_stat->f_frsize;
222 tmp_stat.f_bsize = linux_stat->f_bsize;
223 tmp_stat.f_blocks = linux_stat->f_blocks;
224 tmp_stat.f_bfree = linux_stat->f_bfree;
225 tmp_stat.f_bavail = linux_stat->f_bavail;
226 tmp_stat.f_files = linux_stat->f_files;
227 tmp_stat.f_ffree = linux_stat->f_ffree;
228 tmp_stat.f_fsid = linux_stat->f_fsid;
229 if (bufsiz > sizeof(tmp_stat))
230 bufsiz = sizeof(tmp_stat);
231 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
232 }
233
234 SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
235 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
236 {
237 struct kstatfs linux_stat;
238 int error = user_statfs(pathname, &linux_stat);
239 if (!error)
240 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
241 return error;
242 }
243
244 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
245 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
246 {
247 struct kstatfs linux_stat;
248 int error = fd_statfs(fd, &linux_stat);
249 if (!error)
250 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
251 return error;
252 }
253
254 /*
255 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
256 *
257 * Although to be frank, neither are the native Linux/i386 ones..
258 */
259 struct ufs_args {
260 char __user *devname;
261 int flags;
262 uid_t exroot;
263 };
264
265 struct cdfs_args {
266 char __user *devname;
267 int flags;
268 uid_t exroot;
269
270 /* This has lots more here, which Linux handles with the option block
271 but I'm too lazy to do the translation into ASCII. */
272 };
273
274 struct procfs_args {
275 char __user *devname;
276 int flags;
277 uid_t exroot;
278 };
279
280 /*
281 * We can't actually handle ufs yet, so we translate UFS mounts to
282 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
283 * layout is so braindead it's a major headache doing it.
284 *
285 * Just how long ago was it written? OTOH our UFS driver may be still
286 * unhappy with OSF UFS. [CHECKME]
287 */
288 static int
289 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
290 {
291 int retval;
292 struct cdfs_args tmp;
293 char *devname;
294
295 retval = -EFAULT;
296 if (copy_from_user(&tmp, args, sizeof(tmp)))
297 goto out;
298 devname = getname(tmp.devname);
299 retval = PTR_ERR(devname);
300 if (IS_ERR(devname))
301 goto out;
302 retval = do_mount(devname, dirname, "ext2", flags, NULL);
303 putname(devname);
304 out:
305 return retval;
306 }
307
308 static int
309 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
310 {
311 int retval;
312 struct cdfs_args tmp;
313 char *devname;
314
315 retval = -EFAULT;
316 if (copy_from_user(&tmp, args, sizeof(tmp)))
317 goto out;
318 devname = getname(tmp.devname);
319 retval = PTR_ERR(devname);
320 if (IS_ERR(devname))
321 goto out;
322 retval = do_mount(devname, dirname, "iso9660", flags, NULL);
323 putname(devname);
324 out:
325 return retval;
326 }
327
328 static int
329 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags)
330 {
331 struct procfs_args tmp;
332
333 if (copy_from_user(&tmp, args, sizeof(tmp)))
334 return -EFAULT;
335
336 return do_mount("", dirname, "proc", flags, NULL);
337 }
338
339 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
340 int, flag, void __user *, data)
341 {
342 int retval;
343 char *name;
344
345 name = getname(path);
346 retval = PTR_ERR(name);
347 if (IS_ERR(name))
348 goto out;
349 switch (typenr) {
350 case 1:
351 retval = osf_ufs_mount(name, data, flag);
352 break;
353 case 6:
354 retval = osf_cdfs_mount(name, data, flag);
355 break;
356 case 9:
357 retval = osf_procfs_mount(name, data, flag);
358 break;
359 default:
360 retval = -EINVAL;
361 printk("osf_mount(%ld, %x)\n", typenr, flag);
362 }
363 putname(name);
364 out:
365 return retval;
366 }
367
368 SYSCALL_DEFINE1(osf_utsname, char __user *, name)
369 {
370 int error;
371
372 down_read(&uts_sem);
373 error = -EFAULT;
374 if (copy_to_user(name + 0, utsname()->sysname, 32))
375 goto out;
376 if (copy_to_user(name + 32, utsname()->nodename, 32))
377 goto out;
378 if (copy_to_user(name + 64, utsname()->release, 32))
379 goto out;
380 if (copy_to_user(name + 96, utsname()->version, 32))
381 goto out;
382 if (copy_to_user(name + 128, utsname()->machine, 32))
383 goto out;
384
385 error = 0;
386 out:
387 up_read(&uts_sem);
388 return error;
389 }
390
391 SYSCALL_DEFINE0(getpagesize)
392 {
393 return PAGE_SIZE;
394 }
395
396 SYSCALL_DEFINE0(getdtablesize)
397 {
398 return sysctl_nr_open;
399 }
400
401 /*
402 * For compatibility with OSF/1 only. Use utsname(2) instead.
403 */
404 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
405 {
406 unsigned len;
407 int i;
408
409 if (!access_ok(VERIFY_WRITE, name, namelen))
410 return -EFAULT;
411
412 len = namelen;
413 if (len > 32)
414 len = 32;
415
416 down_read(&uts_sem);
417 for (i = 0; i < len; ++i) {
418 __put_user(utsname()->domainname[i], name + i);
419 if (utsname()->domainname[i] == '\0')
420 break;
421 }
422 up_read(&uts_sem);
423
424 return 0;
425 }
426
427 /*
428 * The following stuff should move into a header file should it ever
429 * be labeled "officially supported." Right now, there is just enough
430 * support to avoid applications (such as tar) printing error
431 * messages. The attributes are not really implemented.
432 */
433
434 /*
435 * Values for Property list entry flag
436 */
437 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
438 by default */
439 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
440 #define PLE_FLAG_ALL -1 /* All flag value */
441
442 struct proplistname_args {
443 unsigned int pl_mask;
444 unsigned int pl_numnames;
445 char **pl_names;
446 };
447
448 union pl_args {
449 struct setargs {
450 char __user *path;
451 long follow;
452 long nbytes;
453 char __user *buf;
454 } set;
455 struct fsetargs {
456 long fd;
457 long nbytes;
458 char __user *buf;
459 } fset;
460 struct getargs {
461 char __user *path;
462 long follow;
463 struct proplistname_args __user *name_args;
464 long nbytes;
465 char __user *buf;
466 int __user *min_buf_size;
467 } get;
468 struct fgetargs {
469 long fd;
470 struct proplistname_args __user *name_args;
471 long nbytes;
472 char __user *buf;
473 int __user *min_buf_size;
474 } fget;
475 struct delargs {
476 char __user *path;
477 long follow;
478 struct proplistname_args __user *name_args;
479 } del;
480 struct fdelargs {
481 long fd;
482 struct proplistname_args __user *name_args;
483 } fdel;
484 };
485
486 enum pl_code {
487 PL_SET = 1, PL_FSET = 2,
488 PL_GET = 3, PL_FGET = 4,
489 PL_DEL = 5, PL_FDEL = 6
490 };
491
492 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
493 union pl_args __user *, args)
494 {
495 long error;
496 int __user *min_buf_size_ptr;
497
498 switch (code) {
499 case PL_SET:
500 if (get_user(error, &args->set.nbytes))
501 error = -EFAULT;
502 break;
503 case PL_FSET:
504 if (get_user(error, &args->fset.nbytes))
505 error = -EFAULT;
506 break;
507 case PL_GET:
508 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
509 if (error)
510 break;
511 error = put_user(0, min_buf_size_ptr);
512 break;
513 case PL_FGET:
514 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
515 if (error)
516 break;
517 error = put_user(0, min_buf_size_ptr);
518 break;
519 case PL_DEL:
520 case PL_FDEL:
521 error = 0;
522 break;
523 default:
524 error = -EOPNOTSUPP;
525 break;
526 };
527 return error;
528 }
529
530 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
531 struct sigstack __user *, uoss)
532 {
533 unsigned long usp = rdusp();
534 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
535 unsigned long oss_os = on_sig_stack(usp);
536 int error;
537
538 if (uss) {
539 void __user *ss_sp;
540
541 error = -EFAULT;
542 if (get_user(ss_sp, &uss->ss_sp))
543 goto out;
544
545 /* If the current stack was set with sigaltstack, don't
546 swap stacks while we are on it. */
547 error = -EPERM;
548 if (current->sas_ss_sp && on_sig_stack(usp))
549 goto out;
550
551 /* Since we don't know the extent of the stack, and we don't
552 track onstack-ness, but rather calculate it, we must
553 presume a size. Ho hum this interface is lossy. */
554 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
555 current->sas_ss_size = SIGSTKSZ;
556 }
557
558 if (uoss) {
559 error = -EFAULT;
560 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
561 || __put_user(oss_sp, &uoss->ss_sp)
562 || __put_user(oss_os, &uoss->ss_onstack))
563 goto out;
564 }
565
566 error = 0;
567 out:
568 return error;
569 }
570
571 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
572 {
573 const char *sysinfo_table[] = {
574 utsname()->sysname,
575 utsname()->nodename,
576 utsname()->release,
577 utsname()->version,
578 utsname()->machine,
579 "alpha", /* instruction set architecture */
580 "dummy", /* hardware serial number */
581 "dummy", /* hardware manufacturer */
582 "dummy", /* secure RPC domain */
583 };
584 unsigned long offset;
585 const char *res;
586 long len, err = -EINVAL;
587
588 offset = command-1;
589 if (offset >= ARRAY_SIZE(sysinfo_table)) {
590 /* Digital UNIX has a few unpublished interfaces here */
591 printk("sysinfo(%d)", command);
592 goto out;
593 }
594
595 down_read(&uts_sem);
596 res = sysinfo_table[offset];
597 len = strlen(res)+1;
598 if ((unsigned long)len > (unsigned long)count)
599 len = count;
600 if (copy_to_user(buf, res, len))
601 err = -EFAULT;
602 else
603 err = 0;
604 up_read(&uts_sem);
605 out:
606 return err;
607 }
608
609 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
610 unsigned long, nbytes, int __user *, start, void __user *, arg)
611 {
612 unsigned long w;
613 struct percpu_struct *cpu;
614
615 switch (op) {
616 case GSI_IEEE_FP_CONTROL:
617 /* Return current software fp control & status bits. */
618 /* Note that DU doesn't verify available space here. */
619
620 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
621 w = swcr_update_status(w, rdfpcr());
622 if (put_user(w, (unsigned long __user *) buffer))
623 return -EFAULT;
624 return 0;
625
626 case GSI_IEEE_STATE_AT_SIGNAL:
627 /*
628 * Not sure anybody will ever use this weird stuff. These
629 * ops can be used (under OSF/1) to set the fpcr that should
630 * be used when a signal handler starts executing.
631 */
632 break;
633
634 case GSI_UACPROC:
635 if (nbytes < sizeof(unsigned int))
636 return -EINVAL;
637 w = (current_thread_info()->flags >> ALPHA_UAC_SHIFT) &
638 UAC_BITMASK;
639 if (put_user(w, (unsigned int __user *)buffer))
640 return -EFAULT;
641 return 1;
642
643 case GSI_PROC_TYPE:
644 if (nbytes < sizeof(unsigned long))
645 return -EINVAL;
646 cpu = (struct percpu_struct*)
647 ((char*)hwrpb + hwrpb->processor_offset);
648 w = cpu->type;
649 if (put_user(w, (unsigned long __user*)buffer))
650 return -EFAULT;
651 return 1;
652
653 case GSI_GET_HWRPB:
654 if (nbytes > sizeof(*hwrpb))
655 return -EINVAL;
656 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
657 return -EFAULT;
658 return 1;
659
660 default:
661 break;
662 }
663
664 return -EOPNOTSUPP;
665 }
666
667 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
668 unsigned long, nbytes, int __user *, start, void __user *, arg)
669 {
670 switch (op) {
671 case SSI_IEEE_FP_CONTROL: {
672 unsigned long swcr, fpcr;
673 unsigned int *state;
674
675 /*
676 * Alpha Architecture Handbook 4.7.7.3:
677 * To be fully IEEE compiant, we must track the current IEEE
678 * exception state in software, because spurious bits can be
679 * set in the trap shadow of a software-complete insn.
680 */
681
682 if (get_user(swcr, (unsigned long __user *)buffer))
683 return -EFAULT;
684 state = &current_thread_info()->ieee_state;
685
686 /* Update softare trap enable bits. */
687 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
688
689 /* Update the real fpcr. */
690 fpcr = rdfpcr() & FPCR_DYN_MASK;
691 fpcr |= ieee_swcr_to_fpcr(swcr);
692 wrfpcr(fpcr);
693
694 return 0;
695 }
696
697 case SSI_IEEE_RAISE_EXCEPTION: {
698 unsigned long exc, swcr, fpcr, fex;
699 unsigned int *state;
700
701 if (get_user(exc, (unsigned long __user *)buffer))
702 return -EFAULT;
703 state = &current_thread_info()->ieee_state;
704 exc &= IEEE_STATUS_MASK;
705
706 /* Update softare trap enable bits. */
707 swcr = (*state & IEEE_SW_MASK) | exc;
708 *state |= exc;
709
710 /* Update the real fpcr. */
711 fpcr = rdfpcr();
712 fpcr |= ieee_swcr_to_fpcr(swcr);
713 wrfpcr(fpcr);
714
715 /* If any exceptions set by this call, and are unmasked,
716 send a signal. Old exceptions are not signaled. */
717 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
718 if (fex) {
719 siginfo_t info;
720 int si_code = 0;
721
722 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
723 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
724 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
725 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
726 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
727 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
728
729 info.si_signo = SIGFPE;
730 info.si_errno = 0;
731 info.si_code = si_code;
732 info.si_addr = NULL; /* FIXME */
733 send_sig_info(SIGFPE, &info, current);
734 }
735 return 0;
736 }
737
738 case SSI_IEEE_STATE_AT_SIGNAL:
739 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
740 /*
741 * Not sure anybody will ever use this weird stuff. These
742 * ops can be used (under OSF/1) to set the fpcr that should
743 * be used when a signal handler starts executing.
744 */
745 break;
746
747 case SSI_NVPAIRS: {
748 unsigned long v, w, i;
749 unsigned int old, new;
750
751 for (i = 0; i < nbytes; ++i) {
752
753 if (get_user(v, 2*i + (unsigned int __user *)buffer))
754 return -EFAULT;
755 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
756 return -EFAULT;
757 switch (v) {
758 case SSIN_UACPROC:
759 again:
760 old = current_thread_info()->flags;
761 new = old & ~(UAC_BITMASK << ALPHA_UAC_SHIFT);
762 new = new | (w & UAC_BITMASK) << ALPHA_UAC_SHIFT;
763 if (cmpxchg(&current_thread_info()->flags,
764 old, new) != old)
765 goto again;
766 break;
767
768 default:
769 return -EOPNOTSUPP;
770 }
771 }
772 return 0;
773 }
774
775 default:
776 break;
777 }
778
779 return -EOPNOTSUPP;
780 }
781
782 /* Translations due to the fact that OSF's time_t is an int. Which
783 affects all sorts of things, like timeval and itimerval. */
784
785 extern struct timezone sys_tz;
786
787 struct timeval32
788 {
789 int tv_sec, tv_usec;
790 };
791
792 struct itimerval32
793 {
794 struct timeval32 it_interval;
795 struct timeval32 it_value;
796 };
797
798 static inline long
799 get_tv32(struct timeval *o, struct timeval32 __user *i)
800 {
801 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
802 (__get_user(o->tv_sec, &i->tv_sec) |
803 __get_user(o->tv_usec, &i->tv_usec)));
804 }
805
806 static inline long
807 put_tv32(struct timeval32 __user *o, struct timeval *i)
808 {
809 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
810 (__put_user(i->tv_sec, &o->tv_sec) |
811 __put_user(i->tv_usec, &o->tv_usec)));
812 }
813
814 static inline long
815 get_it32(struct itimerval *o, struct itimerval32 __user *i)
816 {
817 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
818 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
819 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
820 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
821 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
822 }
823
824 static inline long
825 put_it32(struct itimerval32 __user *o, struct itimerval *i)
826 {
827 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
828 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
829 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
830 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
831 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
832 }
833
834 static inline void
835 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
836 {
837 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
838 value->tv_sec = jiffies / HZ;
839 }
840
841 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
842 struct timezone __user *, tz)
843 {
844 if (tv) {
845 struct timeval ktv;
846 do_gettimeofday(&ktv);
847 if (put_tv32(tv, &ktv))
848 return -EFAULT;
849 }
850 if (tz) {
851 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
852 return -EFAULT;
853 }
854 return 0;
855 }
856
857 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
858 struct timezone __user *, tz)
859 {
860 struct timespec kts;
861 struct timezone ktz;
862
863 if (tv) {
864 if (get_tv32((struct timeval *)&kts, tv))
865 return -EFAULT;
866 }
867 if (tz) {
868 if (copy_from_user(&ktz, tz, sizeof(*tz)))
869 return -EFAULT;
870 }
871
872 kts.tv_nsec *= 1000;
873
874 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
875 }
876
877 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
878 {
879 struct itimerval kit;
880 int error;
881
882 error = do_getitimer(which, &kit);
883 if (!error && put_it32(it, &kit))
884 error = -EFAULT;
885
886 return error;
887 }
888
889 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
890 struct itimerval32 __user *, out)
891 {
892 struct itimerval kin, kout;
893 int error;
894
895 if (in) {
896 if (get_it32(&kin, in))
897 return -EFAULT;
898 } else
899 memset(&kin, 0, sizeof(kin));
900
901 error = do_setitimer(which, &kin, out ? &kout : NULL);
902 if (error || !out)
903 return error;
904
905 if (put_it32(out, &kout))
906 return -EFAULT;
907
908 return 0;
909
910 }
911
912 SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
913 struct timeval32 __user *, tvs)
914 {
915 struct timespec tv[2];
916
917 if (tvs) {
918 struct timeval ktvs[2];
919 if (get_tv32(&ktvs[0], &tvs[0]) ||
920 get_tv32(&ktvs[1], &tvs[1]))
921 return -EFAULT;
922
923 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
924 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
925 return -EINVAL;
926
927 tv[0].tv_sec = ktvs[0].tv_sec;
928 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
929 tv[1].tv_sec = ktvs[1].tv_sec;
930 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
931 }
932
933 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
934 }
935
936 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
937 fd_set __user *, exp, struct timeval32 __user *, tvp)
938 {
939 struct timespec end_time, *to = NULL;
940 if (tvp) {
941 time_t sec, usec;
942
943 to = &end_time;
944
945 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
946 || __get_user(sec, &tvp->tv_sec)
947 || __get_user(usec, &tvp->tv_usec)) {
948 return -EFAULT;
949 }
950
951 if (sec < 0 || usec < 0)
952 return -EINVAL;
953
954 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC))
955 return -EINVAL;
956
957 }
958
959 /* OSF does not copy back the remaining time. */
960 return core_sys_select(n, inp, outp, exp, to);
961 }
962
963 struct rusage32 {
964 struct timeval32 ru_utime; /* user time used */
965 struct timeval32 ru_stime; /* system time used */
966 long ru_maxrss; /* maximum resident set size */
967 long ru_ixrss; /* integral shared memory size */
968 long ru_idrss; /* integral unshared data size */
969 long ru_isrss; /* integral unshared stack size */
970 long ru_minflt; /* page reclaims */
971 long ru_majflt; /* page faults */
972 long ru_nswap; /* swaps */
973 long ru_inblock; /* block input operations */
974 long ru_oublock; /* block output operations */
975 long ru_msgsnd; /* messages sent */
976 long ru_msgrcv; /* messages received */
977 long ru_nsignals; /* signals received */
978 long ru_nvcsw; /* voluntary context switches */
979 long ru_nivcsw; /* involuntary " */
980 };
981
982 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
983 {
984 struct rusage32 r;
985
986 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
987 return -EINVAL;
988
989 memset(&r, 0, sizeof(r));
990 switch (who) {
991 case RUSAGE_SELF:
992 jiffies_to_timeval32(current->utime, &r.ru_utime);
993 jiffies_to_timeval32(current->stime, &r.ru_stime);
994 r.ru_minflt = current->min_flt;
995 r.ru_majflt = current->maj_flt;
996 break;
997 case RUSAGE_CHILDREN:
998 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
999 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1000 r.ru_minflt = current->signal->cmin_flt;
1001 r.ru_majflt = current->signal->cmaj_flt;
1002 break;
1003 }
1004
1005 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1006 }
1007
1008 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1009 struct rusage32 __user *, ur)
1010 {
1011 struct rusage r;
1012 long ret, err;
1013 unsigned int status = 0;
1014 mm_segment_t old_fs;
1015
1016 if (!ur)
1017 return sys_wait4(pid, ustatus, options, NULL);
1018
1019 old_fs = get_fs();
1020
1021 set_fs (KERNEL_DS);
1022 ret = sys_wait4(pid, (unsigned int __user *) &status, options,
1023 (struct rusage __user *) &r);
1024 set_fs (old_fs);
1025
1026 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1027 return -EFAULT;
1028
1029 err = 0;
1030 err |= put_user(status, ustatus);
1031 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1032 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1033 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1034 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1035 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1036 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1037 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1038 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1039 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1040 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1041 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1042 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1043 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1044 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1045 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1046 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1047 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1048 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1049
1050 return err ? err : ret;
1051 }
1052
1053 /*
1054 * I don't know what the parameters are: the first one
1055 * seems to be a timeval pointer, and I suspect the second
1056 * one is the time remaining.. Ho humm.. No documentation.
1057 */
1058 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1059 struct timeval32 __user *, remain)
1060 {
1061 struct timeval tmp;
1062 unsigned long ticks;
1063
1064 if (get_tv32(&tmp, sleep))
1065 goto fault;
1066
1067 ticks = timeval_to_jiffies(&tmp);
1068
1069 ticks = schedule_timeout_interruptible(ticks);
1070
1071 if (remain) {
1072 jiffies_to_timeval(ticks, &tmp);
1073 if (put_tv32(remain, &tmp))
1074 goto fault;
1075 }
1076
1077 return 0;
1078 fault:
1079 return -EFAULT;
1080 }
1081
1082
1083 struct timex32 {
1084 unsigned int modes; /* mode selector */
1085 long offset; /* time offset (usec) */
1086 long freq; /* frequency offset (scaled ppm) */
1087 long maxerror; /* maximum error (usec) */
1088 long esterror; /* estimated error (usec) */
1089 int status; /* clock command/status */
1090 long constant; /* pll time constant */
1091 long precision; /* clock precision (usec) (read only) */
1092 long tolerance; /* clock frequency tolerance (ppm)
1093 * (read only)
1094 */
1095 struct timeval32 time; /* (read only) */
1096 long tick; /* (modified) usecs between clock ticks */
1097
1098 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1099 long jitter; /* pps jitter (us) (ro) */
1100 int shift; /* interval duration (s) (shift) (ro) */
1101 long stabil; /* pps stability (scaled ppm) (ro) */
1102 long jitcnt; /* jitter limit exceeded (ro) */
1103 long calcnt; /* calibration intervals (ro) */
1104 long errcnt; /* calibration errors (ro) */
1105 long stbcnt; /* stability limit exceeded (ro) */
1106
1107 int :32; int :32; int :32; int :32;
1108 int :32; int :32; int :32; int :32;
1109 int :32; int :32; int :32; int :32;
1110 };
1111
1112 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1113 {
1114 struct timex txc;
1115 int ret;
1116
1117 /* copy relevant bits of struct timex. */
1118 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1119 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1120 offsetof(struct timex32, time)))
1121 return -EFAULT;
1122
1123 ret = do_adjtimex(&txc);
1124 if (ret < 0)
1125 return ret;
1126
1127 /* copy back to timex32 */
1128 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1129 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1130 offsetof(struct timex32, tick))) ||
1131 (put_tv32(&txc_p->time, &txc.time)))
1132 return -EFAULT;
1133
1134 return ret;
1135 }
1136
1137 /* Get an address range which is currently unmapped. Similar to the
1138 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1139
1140 static unsigned long
1141 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1142 unsigned long limit)
1143 {
1144 struct vm_area_struct *vma = find_vma(current->mm, addr);
1145
1146 while (1) {
1147 /* At this point: (!vma || addr < vma->vm_end). */
1148 if (limit - len < addr)
1149 return -ENOMEM;
1150 if (!vma || addr + len <= vma->vm_start)
1151 return addr;
1152 addr = vma->vm_end;
1153 vma = vma->vm_next;
1154 }
1155 }
1156
1157 unsigned long
1158 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1159 unsigned long len, unsigned long pgoff,
1160 unsigned long flags)
1161 {
1162 unsigned long limit;
1163
1164 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1165 if (current->personality & ADDR_LIMIT_32BIT)
1166 limit = 0x80000000;
1167 else
1168 limit = TASK_SIZE;
1169
1170 if (len > limit)
1171 return -ENOMEM;
1172
1173 if (flags & MAP_FIXED)
1174 return addr;
1175
1176 /* First, see if the given suggestion fits.
1177
1178 The OSF/1 loader (/sbin/loader) relies on us returning an
1179 address larger than the requested if one exists, which is
1180 a terribly broken way to program.
1181
1182 That said, I can see the use in being able to suggest not
1183 merely specific addresses, but regions of memory -- perhaps
1184 this feature should be incorporated into all ports? */
1185
1186 if (addr) {
1187 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1188 if (addr != (unsigned long) -ENOMEM)
1189 return addr;
1190 }
1191
1192 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1193 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1194 len, limit);
1195 if (addr != (unsigned long) -ENOMEM)
1196 return addr;
1197
1198 /* Finally, try allocating in low memory. */
1199 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1200
1201 return addr;
1202 }
1203
1204 #ifdef CONFIG_OSF4_COMPAT
1205
1206 /* Clear top 32 bits of iov_len in the user's buffer for
1207 compatibility with old versions of OSF/1 where iov_len
1208 was defined as int. */
1209 static int
1210 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1211 {
1212 unsigned long i;
1213
1214 for (i = 0 ; i < count ; i++) {
1215 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1216
1217 if (put_user(0, iov_len_high))
1218 return -EFAULT;
1219 }
1220 return 0;
1221 }
1222
1223 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1224 const struct iovec __user *, vector, unsigned long, count)
1225 {
1226 if (unlikely(personality(current->personality) == PER_OSF4))
1227 if (osf_fix_iov_len(vector, count))
1228 return -EFAULT;
1229 return sys_readv(fd, vector, count);
1230 }
1231
1232 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1233 const struct iovec __user *, vector, unsigned long, count)
1234 {
1235 if (unlikely(personality(current->personality) == PER_OSF4))
1236 if (osf_fix_iov_len(vector, count))
1237 return -EFAULT;
1238 return sys_writev(fd, vector, count);
1239 }
1240
1241 #endif