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mm-only debug patch...
[mmotm.git] / arch / alpha / kernel / osf_sys.c
blob9a3334ae282e38345d177e060acc2021fdeda084
1 /*
2 * linux/arch/alpha/kernel/osf_sys.c
3 *
4 * Copyright (C) 1995 Linus Torvalds
5 */
6
7 /*
8 * This file handles some of the stranger OSF/1 system call interfaces.
9 * Some of the system calls expect a non-C calling standard, others have
10 * special parameter blocks..
11 */
12
13 #include <linux/errno.h>
14 #include <linux/sched.h>
15 #include <linux/kernel.h>
16 #include <linux/mm.h>
17 #include <linux/smp.h>
18 #include <linux/smp_lock.h>
19 #include <linux/stddef.h>
20 #include <linux/syscalls.h>
21 #include <linux/unistd.h>
22 #include <linux/ptrace.h>
23 #include <linux/slab.h>
24 #include <linux/user.h>
25 #include <linux/utsname.h>
26 #include <linux/time.h>
27 #include <linux/timex.h>
28 #include <linux/major.h>
29 #include <linux/stat.h>
30 #include <linux/mman.h>
31 #include <linux/shm.h>
32 #include <linux/poll.h>
33 #include <linux/file.h>
34 #include <linux/types.h>
35 #include <linux/ipc.h>
36 #include <linux/namei.h>
37 #include <linux/uio.h>
38 #include <linux/vfs.h>
39 #include <linux/rcupdate.h>
40
41 #include <asm/fpu.h>
42 #include <asm/io.h>
43 #include <asm/uaccess.h>
44 #include <asm/system.h>
45 #include <asm/sysinfo.h>
46 #include <asm/hwrpb.h>
47 #include <asm/processor.h>
48
49 /*
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 lock_kernel();
73 mm = current->mm;
74 mm->end_code = bss_start + bss_len;
75 mm->start_brk = bss_start + bss_len;
76 mm->brk = bss_start + bss_len;
77 #if 0
78 printk("set_program_attributes(%lx %lx %lx %lx)\n",
79 text_start, text_len, bss_start, bss_len);
80 #endif
81 unlock_kernel();
82 return 0;
83 }
84
85 /*
86 * OSF/1 directory handling functions...
87 *
88 * The "getdents()" interface is much more sane: the "basep" stuff is
89 * braindamage (it can't really handle filesystems where the directory
90 * offset differences aren't the same as "d_reclen").
91 */
92 #define NAME_OFFSET offsetof (struct osf_dirent, d_name)
93
94 struct osf_dirent {
95 unsigned int d_ino;
96 unsigned short d_reclen;
97 unsigned short d_namlen;
98 char d_name[1];
99 };
100
101 struct osf_dirent_callback {
102 struct osf_dirent __user *dirent;
103 long __user *basep;
104 unsigned int count;
105 int error;
106 };
107
108 static int
109 osf_filldir(void *__buf, const char *name, int namlen, loff_t offset,
110 u64 ino, unsigned int d_type)
111 {
112 struct osf_dirent __user *dirent;
113 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf;
114 unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32));
115 unsigned int d_ino;
116
117 buf->error = -EINVAL; /* only used if we fail */
118 if (reclen > buf->count)
119 return -EINVAL;
120 d_ino = ino;
121 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
122 buf->error = -EOVERFLOW;
123 return -EOVERFLOW;
124 }
125 if (buf->basep) {
126 if (put_user(offset, buf->basep))
127 goto Efault;
128 buf->basep = NULL;
129 }
130 dirent = buf->dirent;
131 if (put_user(d_ino, &dirent->d_ino) ||
132 put_user(namlen, &dirent->d_namlen) ||
133 put_user(reclen, &dirent->d_reclen) ||
134 copy_to_user(dirent->d_name, name, namlen) ||
135 put_user(0, dirent->d_name + namlen))
136 goto Efault;
137 dirent = (void __user *)dirent + reclen;
138 buf->dirent = dirent;
139 buf->count -= reclen;
140 return 0;
141 Efault:
142 buf->error = -EFAULT;
143 return -EFAULT;
144 }
145
146 SYSCALL_DEFINE4(osf_getdirentries, unsigned int, fd,
147 struct osf_dirent __user *, dirent, unsigned int, count,
148 long __user *, basep)
149 {
150 int error;
151 struct file *file;
152 struct osf_dirent_callback buf;
153
154 error = -EBADF;
155 file = fget(fd);
156 if (!file)
157 goto out;
158
159 buf.dirent = dirent;
160 buf.basep = basep;
161 buf.count = count;
162 buf.error = 0;
163
164 error = vfs_readdir(file, osf_filldir, &buf);
165 if (error >= 0)
166 error = buf.error;
167 if (count != buf.count)
168 error = count - buf.count;
169
170 fput(file);
171 out:
172 return error;
173 }
174
175 #undef NAME_OFFSET
176
177 SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
178 unsigned long, prot, unsigned long, flags, unsigned long, fd,
179 unsigned long, off)
180 {
181 struct file *file = NULL;
182 unsigned long ret = -EBADF;
183
184 #if 0
185 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
186 printk("%s: unimplemented OSF mmap flags %04lx\n",
187 current->comm, flags);
188 #endif
189 if (!(flags & MAP_ANONYMOUS)) {
190 file = fget(fd);
191 if (!file)
192 goto out;
193 }
194 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
195 down_write(&current->mm->mmap_sem);
196 ret = do_mmap(file, addr, len, prot, flags, off);
197 up_write(&current->mm->mmap_sem);
198 if (file)
199 fput(file);
200 out:
201 return ret;
202 }
203
204
205 /*
206 * The OSF/1 statfs structure is much larger, but this should
207 * match the beginning, at least.
208 */
209 struct osf_statfs {
210 short f_type;
211 short f_flags;
212 int f_fsize;
213 int f_bsize;
214 int f_blocks;
215 int f_bfree;
216 int f_bavail;
217 int f_files;
218 int f_ffree;
219 __kernel_fsid_t f_fsid;
220 };
221
222 static int
223 linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
224 unsigned long bufsiz)
225 {
226 struct osf_statfs tmp_stat;
227
228 tmp_stat.f_type = linux_stat->f_type;
229 tmp_stat.f_flags = 0; /* mount flags */
230 tmp_stat.f_fsize = linux_stat->f_frsize;
231 tmp_stat.f_bsize = linux_stat->f_bsize;
232 tmp_stat.f_blocks = linux_stat->f_blocks;
233 tmp_stat.f_bfree = linux_stat->f_bfree;
234 tmp_stat.f_bavail = linux_stat->f_bavail;
235 tmp_stat.f_files = linux_stat->f_files;
236 tmp_stat.f_ffree = linux_stat->f_ffree;
237 tmp_stat.f_fsid = linux_stat->f_fsid;
238 if (bufsiz > sizeof(tmp_stat))
239 bufsiz = sizeof(tmp_stat);
240 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
241 }
242
243 static int
244 do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer,
245 unsigned long bufsiz)
246 {
247 struct kstatfs linux_stat;
248 int error = vfs_statfs(dentry, &linux_stat);
249 if (!error)
250 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
251 return error;
252 }
253
254 SYSCALL_DEFINE3(osf_statfs, char __user *, pathname,
255 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
256 {
257 struct path path;
258 int retval;
259
260 retval = user_path(pathname, &path);
261 if (!retval) {
262 retval = do_osf_statfs(path.dentry, buffer, bufsiz);
263 path_put(&path);
264 }
265 return retval;
266 }
267
268 SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
269 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
270 {
271 struct file *file;
272 int retval;
273
274 retval = -EBADF;
275 file = fget(fd);
276 if (file) {
277 retval = do_osf_statfs(file->f_path.dentry, buffer, bufsiz);
278 fput(file);
279 }
280 return retval;
281 }
282
283 /*
284 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
285 *
286 * Although to be frank, neither are the native Linux/i386 ones..
287 */
288 struct ufs_args {
289 char __user *devname;
290 int flags;
291 uid_t exroot;
292 };
293
294 struct cdfs_args {
295 char __user *devname;
296 int flags;
297 uid_t exroot;
298
299 /* This has lots more here, which Linux handles with the option block
300 but I'm too lazy to do the translation into ASCII. */
301 };
302
303 struct procfs_args {
304 char __user *devname;
305 int flags;
306 uid_t exroot;
307 };
308
309 /*
310 * We can't actually handle ufs yet, so we translate UFS mounts to
311 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
312 * layout is so braindead it's a major headache doing it.
313 *
314 * Just how long ago was it written? OTOH our UFS driver may be still
315 * unhappy with OSF UFS. [CHECKME]
316 */
317 static int
318 osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
319 {
320 int retval;
321 struct cdfs_args tmp;
322 char *devname;
323
324 retval = -EFAULT;
325 if (copy_from_user(&tmp, args, sizeof(tmp)))
326 goto out;
327 devname = getname(tmp.devname);
328 retval = PTR_ERR(devname);
329 if (IS_ERR(devname))
330 goto out;
331 retval = do_mount(devname, dirname, "ext2", flags, NULL);
332 putname(devname);
333 out:
334 return retval;
335 }
336
337 static int
338 osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
339 {
340 int retval;
341 struct cdfs_args tmp;
342 char *devname;
343
344 retval = -EFAULT;
345 if (copy_from_user(&tmp, args, sizeof(tmp)))
346 goto out;
347 devname = getname(tmp.devname);
348 retval = PTR_ERR(devname);
349 if (IS_ERR(devname))
350 goto out;
351 retval = do_mount(devname, dirname, "iso9660", flags, NULL);
352 putname(devname);
353 out:
354 return retval;
355 }
356
357 static int
358 osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags)
359 {
360 struct procfs_args tmp;
361
362 if (copy_from_user(&tmp, args, sizeof(tmp)))
363 return -EFAULT;
364
365 return do_mount("", dirname, "proc", flags, NULL);
366 }
367
368 SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, char __user *, path,
369 int, flag, void __user *, data)
370 {
371 int retval = -EINVAL;
372 char *name;
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 return retval;
394 }
395
396 SYSCALL_DEFINE1(osf_utsname, char __user *, name)
397 {
398 int error;
399
400 down_read(&uts_sem);
401 error = -EFAULT;
402 if (copy_to_user(name + 0, utsname()->sysname, 32))
403 goto out;
404 if (copy_to_user(name + 32, utsname()->nodename, 32))
405 goto out;
406 if (copy_to_user(name + 64, utsname()->release, 32))
407 goto out;
408 if (copy_to_user(name + 96, utsname()->version, 32))
409 goto out;
410 if (copy_to_user(name + 128, utsname()->machine, 32))
411 goto out;
412
413 error = 0;
414 out:
415 up_read(&uts_sem);
416 return error;
417 }
418
419 SYSCALL_DEFINE0(getpagesize)
420 {
421 return PAGE_SIZE;
422 }
423
424 SYSCALL_DEFINE0(getdtablesize)
425 {
426 return sysctl_nr_open;
427 }
428
429 /*
430 * For compatibility with OSF/1 only. Use utsname(2) instead.
431 */
432 SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
433 {
434 unsigned len;
435 int i;
436
437 if (!access_ok(VERIFY_WRITE, name, namelen))
438 return -EFAULT;
439
440 len = namelen;
441 if (namelen > 32)
442 len = 32;
443
444 down_read(&uts_sem);
445 for (i = 0; i < len; ++i) {
446 __put_user(utsname()->domainname[i], name + i);
447 if (utsname()->domainname[i] == '\0')
448 break;
449 }
450 up_read(&uts_sem);
451
452 return 0;
453 }
454
455 /*
456 * The following stuff should move into a header file should it ever
457 * be labeled "officially supported." Right now, there is just enough
458 * support to avoid applications (such as tar) printing error
459 * messages. The attributes are not really implemented.
460 */
461
462 /*
463 * Values for Property list entry flag
464 */
465 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
466 by default */
467 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
468 #define PLE_FLAG_ALL -1 /* All flag value */
469
470 struct proplistname_args {
471 unsigned int pl_mask;
472 unsigned int pl_numnames;
473 char **pl_names;
474 };
475
476 union pl_args {
477 struct setargs {
478 char __user *path;
479 long follow;
480 long nbytes;
481 char __user *buf;
482 } set;
483 struct fsetargs {
484 long fd;
485 long nbytes;
486 char __user *buf;
487 } fset;
488 struct getargs {
489 char __user *path;
490 long follow;
491 struct proplistname_args __user *name_args;
492 long nbytes;
493 char __user *buf;
494 int __user *min_buf_size;
495 } get;
496 struct fgetargs {
497 long fd;
498 struct proplistname_args __user *name_args;
499 long nbytes;
500 char __user *buf;
501 int __user *min_buf_size;
502 } fget;
503 struct delargs {
504 char __user *path;
505 long follow;
506 struct proplistname_args __user *name_args;
507 } del;
508 struct fdelargs {
509 long fd;
510 struct proplistname_args __user *name_args;
511 } fdel;
512 };
513
514 enum pl_code {
515 PL_SET = 1, PL_FSET = 2,
516 PL_GET = 3, PL_FGET = 4,
517 PL_DEL = 5, PL_FDEL = 6
518 };
519
520 SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
521 union pl_args __user *, args)
522 {
523 long error;
524 int __user *min_buf_size_ptr;
525
526 lock_kernel();
527 switch (code) {
528 case PL_SET:
529 if (get_user(error, &args->set.nbytes))
530 error = -EFAULT;
531 break;
532 case PL_FSET:
533 if (get_user(error, &args->fset.nbytes))
534 error = -EFAULT;
535 break;
536 case PL_GET:
537 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
538 if (error)
539 break;
540 error = put_user(0, min_buf_size_ptr);
541 break;
542 case PL_FGET:
543 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
544 if (error)
545 break;
546 error = put_user(0, min_buf_size_ptr);
547 break;
548 case PL_DEL:
549 case PL_FDEL:
550 error = 0;
551 break;
552 default:
553 error = -EOPNOTSUPP;
554 break;
555 };
556 unlock_kernel();
557 return error;
558 }
559
560 SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
561 struct sigstack __user *, uoss)
562 {
563 unsigned long usp = rdusp();
564 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
565 unsigned long oss_os = on_sig_stack(usp);
566 int error;
567
568 if (uss) {
569 void __user *ss_sp;
570
571 error = -EFAULT;
572 if (get_user(ss_sp, &uss->ss_sp))
573 goto out;
574
575 /* If the current stack was set with sigaltstack, don't
576 swap stacks while we are on it. */
577 error = -EPERM;
578 if (current->sas_ss_sp && on_sig_stack(usp))
579 goto out;
580
581 /* Since we don't know the extent of the stack, and we don't
582 track onstack-ness, but rather calculate it, we must
583 presume a size. Ho hum this interface is lossy. */
584 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
585 current->sas_ss_size = SIGSTKSZ;
586 }
587
588 if (uoss) {
589 error = -EFAULT;
590 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
591 || __put_user(oss_sp, &uoss->ss_sp)
592 || __put_user(oss_os, &uoss->ss_onstack))
593 goto out;
594 }
595
596 error = 0;
597 out:
598 return error;
599 }
600
601 SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
602 {
603 char *sysinfo_table[] = {
604 utsname()->sysname,
605 utsname()->nodename,
606 utsname()->release,
607 utsname()->version,
608 utsname()->machine,
609 "alpha", /* instruction set architecture */
610 "dummy", /* hardware serial number */
611 "dummy", /* hardware manufacturer */
612 "dummy", /* secure RPC domain */
613 };
614 unsigned long offset;
615 char *res;
616 long len, err = -EINVAL;
617
618 offset = command-1;
619 if (offset >= ARRAY_SIZE(sysinfo_table)) {
620 /* Digital UNIX has a few unpublished interfaces here */
621 printk("sysinfo(%d)", command);
622 goto out;
623 }
624
625 down_read(&uts_sem);
626 res = sysinfo_table[offset];
627 len = strlen(res)+1;
628 if (len > count)
629 len = count;
630 if (copy_to_user(buf, res, len))
631 err = -EFAULT;
632 else
633 err = 0;
634 up_read(&uts_sem);
635 out:
636 return err;
637 }
638
639 SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
640 unsigned long, nbytes, int __user *, start, void __user *, arg)
641 {
642 unsigned long w;
643 struct percpu_struct *cpu;
644
645 switch (op) {
646 case GSI_IEEE_FP_CONTROL:
647 /* Return current software fp control & status bits. */
648 /* Note that DU doesn't verify available space here. */
649
650 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
651 w = swcr_update_status(w, rdfpcr());
652 if (put_user(w, (unsigned long __user *) buffer))
653 return -EFAULT;
654 return 0;
655
656 case GSI_IEEE_STATE_AT_SIGNAL:
657 /*
658 * Not sure anybody will ever use this weird stuff. These
659 * ops can be used (under OSF/1) to set the fpcr that should
660 * be used when a signal handler starts executing.
661 */
662 break;
663
664 case GSI_UACPROC:
665 if (nbytes < sizeof(unsigned int))
666 return -EINVAL;
667 w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK;
668 if (put_user(w, (unsigned int __user *)buffer))
669 return -EFAULT;
670 return 1;
671
672 case GSI_PROC_TYPE:
673 if (nbytes < sizeof(unsigned long))
674 return -EINVAL;
675 cpu = (struct percpu_struct*)
676 ((char*)hwrpb + hwrpb->processor_offset);
677 w = cpu->type;
678 if (put_user(w, (unsigned long __user*)buffer))
679 return -EFAULT;
680 return 1;
681
682 case GSI_GET_HWRPB:
683 if (nbytes < sizeof(*hwrpb))
684 return -EINVAL;
685 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
686 return -EFAULT;
687 return 1;
688
689 default:
690 break;
691 }
692
693 return -EOPNOTSUPP;
694 }
695
696 SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
697 unsigned long, nbytes, int __user *, start, void __user *, arg)
698 {
699 switch (op) {
700 case SSI_IEEE_FP_CONTROL: {
701 unsigned long swcr, fpcr;
702 unsigned int *state;
703
704 /*
705 * Alpha Architecture Handbook 4.7.7.3:
706 * To be fully IEEE compiant, we must track the current IEEE
707 * exception state in software, because spurious bits can be
708 * set in the trap shadow of a software-complete insn.
709 */
710
711 if (get_user(swcr, (unsigned long __user *)buffer))
712 return -EFAULT;
713 state = &current_thread_info()->ieee_state;
714
715 /* Update softare trap enable bits. */
716 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
717
718 /* Update the real fpcr. */
719 fpcr = rdfpcr() & FPCR_DYN_MASK;
720 fpcr |= ieee_swcr_to_fpcr(swcr);
721 wrfpcr(fpcr);
722
723 return 0;
724 }
725
726 case SSI_IEEE_RAISE_EXCEPTION: {
727 unsigned long exc, swcr, fpcr, fex;
728 unsigned int *state;
729
730 if (get_user(exc, (unsigned long __user *)buffer))
731 return -EFAULT;
732 state = &current_thread_info()->ieee_state;
733 exc &= IEEE_STATUS_MASK;
734
735 /* Update softare trap enable bits. */
736 swcr = (*state & IEEE_SW_MASK) | exc;
737 *state |= exc;
738
739 /* Update the real fpcr. */
740 fpcr = rdfpcr();
741 fpcr |= ieee_swcr_to_fpcr(swcr);
742 wrfpcr(fpcr);
743
744 /* If any exceptions set by this call, and are unmasked,
745 send a signal. Old exceptions are not signaled. */
746 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
747 if (fex) {
748 siginfo_t info;
749 int si_code = 0;
750
751 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
752 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
753 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
754 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
755 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
756 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
757
758 info.si_signo = SIGFPE;
759 info.si_errno = 0;
760 info.si_code = si_code;
761 info.si_addr = NULL; /* FIXME */
762 send_sig_info(SIGFPE, &info, current);
763 }
764 return 0;
765 }
766
767 case SSI_IEEE_STATE_AT_SIGNAL:
768 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
769 /*
770 * Not sure anybody will ever use this weird stuff. These
771 * ops can be used (under OSF/1) to set the fpcr that should
772 * be used when a signal handler starts executing.
773 */
774 break;
775
776 case SSI_NVPAIRS: {
777 unsigned long v, w, i;
778 unsigned int old, new;
779
780 for (i = 0; i < nbytes; ++i) {
781
782 if (get_user(v, 2*i + (unsigned int __user *)buffer))
783 return -EFAULT;
784 if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer))
785 return -EFAULT;
786 switch (v) {
787 case SSIN_UACPROC:
788 again:
789 old = current_thread_info()->flags;
790 new = old & ~(UAC_BITMASK << UAC_SHIFT);
791 new = new | (w & UAC_BITMASK) << UAC_SHIFT;
792 if (cmpxchg(&current_thread_info()->flags,
793 old, new) != old)
794 goto again;
795 break;
796
797 default:
798 return -EOPNOTSUPP;
799 }
800 }
801 return 0;
802 }
803
804 default:
805 break;
806 }
807
808 return -EOPNOTSUPP;
809 }
810
811 /* Translations due to the fact that OSF's time_t is an int. Which
812 affects all sorts of things, like timeval and itimerval. */
813
814 extern struct timezone sys_tz;
815
816 struct timeval32
817 {
818 int tv_sec, tv_usec;
819 };
820
821 struct itimerval32
822 {
823 struct timeval32 it_interval;
824 struct timeval32 it_value;
825 };
826
827 static inline long
828 get_tv32(struct timeval *o, struct timeval32 __user *i)
829 {
830 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
831 (__get_user(o->tv_sec, &i->tv_sec) |
832 __get_user(o->tv_usec, &i->tv_usec)));
833 }
834
835 static inline long
836 put_tv32(struct timeval32 __user *o, struct timeval *i)
837 {
838 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
839 (__put_user(i->tv_sec, &o->tv_sec) |
840 __put_user(i->tv_usec, &o->tv_usec)));
841 }
842
843 static inline long
844 get_it32(struct itimerval *o, struct itimerval32 __user *i)
845 {
846 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
847 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
848 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
849 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
850 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
851 }
852
853 static inline long
854 put_it32(struct itimerval32 __user *o, struct itimerval *i)
855 {
856 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
857 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
858 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
859 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
860 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
861 }
862
863 static inline void
864 jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
865 {
866 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
867 value->tv_sec = jiffies / HZ;
868 }
869
870 SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
871 struct timezone __user *, tz)
872 {
873 if (tv) {
874 struct timeval ktv;
875 do_gettimeofday(&ktv);
876 if (put_tv32(tv, &ktv))
877 return -EFAULT;
878 }
879 if (tz) {
880 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
881 return -EFAULT;
882 }
883 return 0;
884 }
885
886 SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
887 struct timezone __user *, tz)
888 {
889 struct timespec kts;
890 struct timezone ktz;
891
892 if (tv) {
893 if (get_tv32((struct timeval *)&kts, tv))
894 return -EFAULT;
895 }
896 if (tz) {
897 if (copy_from_user(&ktz, tz, sizeof(*tz)))
898 return -EFAULT;
899 }
900
901 kts.tv_nsec *= 1000;
902
903 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
904 }
905
906 SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
907 {
908 struct itimerval kit;
909 int error;
910
911 error = do_getitimer(which, &kit);
912 if (!error && put_it32(it, &kit))
913 error = -EFAULT;
914
915 return error;
916 }
917
918 SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
919 struct itimerval32 __user *, out)
920 {
921 struct itimerval kin, kout;
922 int error;
923
924 if (in) {
925 if (get_it32(&kin, in))
926 return -EFAULT;
927 } else
928 memset(&kin, 0, sizeof(kin));
929
930 error = do_setitimer(which, &kin, out ? &kout : NULL);
931 if (error || !out)
932 return error;
933
934 if (put_it32(out, &kout))
935 return -EFAULT;
936
937 return 0;
938
939 }
940
941 SYSCALL_DEFINE2(osf_utimes, char __user *, filename,
942 struct timeval32 __user *, tvs)
943 {
944 struct timespec tv[2];
945
946 if (tvs) {
947 struct timeval ktvs[2];
948 if (get_tv32(&ktvs[0], &tvs[0]) ||
949 get_tv32(&ktvs[1], &tvs[1]))
950 return -EFAULT;
951
952 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
953 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
954 return -EINVAL;
955
956 tv[0].tv_sec = ktvs[0].tv_sec;
957 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
958 tv[1].tv_sec = ktvs[1].tv_sec;
959 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
960 }
961
962 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
963 }
964
965 #define MAX_SELECT_SECONDS \
966 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
967
968 SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
969 fd_set __user *, exp, struct timeval32 __user *, tvp)
970 {
971 struct timespec end_time, *to = NULL;
972 if (tvp) {
973 time_t sec, usec;
974
975 to = &end_time;
976
977 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
978 || __get_user(sec, &tvp->tv_sec)
979 || __get_user(usec, &tvp->tv_usec)) {
980 return -EFAULT;
981 }
982
983 if (sec < 0 || usec < 0)
984 return -EINVAL;
985
986 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC))
987 return -EINVAL;
988
989 }
990
991 /* OSF does not copy back the remaining time. */
992 return core_sys_select(n, inp, outp, exp, to);
993 }
994
995 struct rusage32 {
996 struct timeval32 ru_utime; /* user time used */
997 struct timeval32 ru_stime; /* system time used */
998 long ru_maxrss; /* maximum resident set size */
999 long ru_ixrss; /* integral shared memory size */
1000 long ru_idrss; /* integral unshared data size */
1001 long ru_isrss; /* integral unshared stack size */
1002 long ru_minflt; /* page reclaims */
1003 long ru_majflt; /* page faults */
1004 long ru_nswap; /* swaps */
1005 long ru_inblock; /* block input operations */
1006 long ru_oublock; /* block output operations */
1007 long ru_msgsnd; /* messages sent */
1008 long ru_msgrcv; /* messages received */
1009 long ru_nsignals; /* signals received */
1010 long ru_nvcsw; /* voluntary context switches */
1011 long ru_nivcsw; /* involuntary " */
1012 };
1013
1014 SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1015 {
1016 struct rusage32 r;
1017
1018 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1019 return -EINVAL;
1020
1021 memset(&r, 0, sizeof(r));
1022 switch (who) {
1023 case RUSAGE_SELF:
1024 jiffies_to_timeval32(current->utime, &r.ru_utime);
1025 jiffies_to_timeval32(current->stime, &r.ru_stime);
1026 r.ru_minflt = current->min_flt;
1027 r.ru_majflt = current->maj_flt;
1028 break;
1029 case RUSAGE_CHILDREN:
1030 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1031 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1032 r.ru_minflt = current->signal->cmin_flt;
1033 r.ru_majflt = current->signal->cmaj_flt;
1034 break;
1035 }
1036
1037 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1038 }
1039
1040 SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1041 struct rusage32 __user *, ur)
1042 {
1043 struct rusage r;
1044 long ret, err;
1045 mm_segment_t old_fs;
1046
1047 if (!ur)
1048 return sys_wait4(pid, ustatus, options, NULL);
1049
1050 old_fs = get_fs();
1051
1052 set_fs (KERNEL_DS);
1053 ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r);
1054 set_fs (old_fs);
1055
1056 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1057 return -EFAULT;
1058
1059 err = 0;
1060 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1061 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1062 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1063 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1064 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1065 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1066 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1067 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1068 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1069 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1070 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1071 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1072 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1073 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1074 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1075 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1076 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1077 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1078
1079 return err ? err : ret;
1080 }
1081
1082 /*
1083 * I don't know what the parameters are: the first one
1084 * seems to be a timeval pointer, and I suspect the second
1085 * one is the time remaining.. Ho humm.. No documentation.
1086 */
1087 SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1088 struct timeval32 __user *, remain)
1089 {
1090 struct timeval tmp;
1091 unsigned long ticks;
1092
1093 if (get_tv32(&tmp, sleep))
1094 goto fault;
1095
1096 ticks = timeval_to_jiffies(&tmp);
1097
1098 ticks = schedule_timeout_interruptible(ticks);
1099
1100 if (remain) {
1101 jiffies_to_timeval(ticks, &tmp);
1102 if (put_tv32(remain, &tmp))
1103 goto fault;
1104 }
1105
1106 return 0;
1107 fault:
1108 return -EFAULT;
1109 }
1110
1111
1112 struct timex32 {
1113 unsigned int modes; /* mode selector */
1114 long offset; /* time offset (usec) */
1115 long freq; /* frequency offset (scaled ppm) */
1116 long maxerror; /* maximum error (usec) */
1117 long esterror; /* estimated error (usec) */
1118 int status; /* clock command/status */
1119 long constant; /* pll time constant */
1120 long precision; /* clock precision (usec) (read only) */
1121 long tolerance; /* clock frequency tolerance (ppm)
1122 * (read only)
1123 */
1124 struct timeval32 time; /* (read only) */
1125 long tick; /* (modified) usecs between clock ticks */
1126
1127 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1128 long jitter; /* pps jitter (us) (ro) */
1129 int shift; /* interval duration (s) (shift) (ro) */
1130 long stabil; /* pps stability (scaled ppm) (ro) */
1131 long jitcnt; /* jitter limit exceeded (ro) */
1132 long calcnt; /* calibration intervals (ro) */
1133 long errcnt; /* calibration errors (ro) */
1134 long stbcnt; /* stability limit exceeded (ro) */
1135
1136 int :32; int :32; int :32; int :32;
1137 int :32; int :32; int :32; int :32;
1138 int :32; int :32; int :32; int :32;
1139 };
1140
1141 SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1142 {
1143 struct timex txc;
1144 int ret;
1145
1146 /* copy relevant bits of struct timex. */
1147 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1148 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1149 offsetof(struct timex32, time)))
1150 return -EFAULT;
1151
1152 ret = do_adjtimex(&txc);
1153 if (ret < 0)
1154 return ret;
1155
1156 /* copy back to timex32 */
1157 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1158 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1159 offsetof(struct timex32, tick))) ||
1160 (put_tv32(&txc_p->time, &txc.time)))
1161 return -EFAULT;
1162
1163 return ret;
1164 }
1165
1166 /* Get an address range which is currently unmapped. Similar to the
1167 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1168
1169 static unsigned long
1170 arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1171 unsigned long limit)
1172 {
1173 struct vm_area_struct *vma = find_vma(current->mm, addr);
1174
1175 while (1) {
1176 /* At this point: (!vma || addr < vma->vm_end). */
1177 if (limit - len < addr)
1178 return -ENOMEM;
1179 if (!vma || addr + len <= vma->vm_start)
1180 return addr;
1181 addr = vma->vm_end;
1182 vma = vma->vm_next;
1183 }
1184 }
1185
1186 unsigned long
1187 arch_get_unmapped_area(struct file *filp, unsigned long addr,
1188 unsigned long len, unsigned long pgoff,
1189 unsigned long flags)
1190 {
1191 unsigned long limit;
1192
1193 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1194 if (current->personality & ADDR_LIMIT_32BIT)
1195 limit = 0x80000000;
1196 else
1197 limit = TASK_SIZE;
1198
1199 if (len > limit)
1200 return -ENOMEM;
1201
1202 if (flags & MAP_FIXED)
1203 return addr;
1204
1205 /* First, see if the given suggestion fits.
1206
1207 The OSF/1 loader (/sbin/loader) relies on us returning an
1208 address larger than the requested if one exists, which is
1209 a terribly broken way to program.
1210
1211 That said, I can see the use in being able to suggest not
1212 merely specific addresses, but regions of memory -- perhaps
1213 this feature should be incorporated into all ports? */
1214
1215 if (addr) {
1216 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1217 if (addr != (unsigned long) -ENOMEM)
1218 return addr;
1219 }
1220
1221 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1222 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1223 len, limit);
1224 if (addr != (unsigned long) -ENOMEM)
1225 return addr;
1226
1227 /* Finally, try allocating in low memory. */
1228 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1229
1230 return addr;
1231 }
1232
1233 #ifdef CONFIG_OSF4_COMPAT
1234
1235 /* Clear top 32 bits of iov_len in the user's buffer for
1236 compatibility with old versions of OSF/1 where iov_len
1237 was defined as int. */
1238 static int
1239 osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1240 {
1241 unsigned long i;
1242
1243 for (i = 0 ; i < count ; i++) {
1244 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1245
1246 if (put_user(0, iov_len_high))
1247 return -EFAULT;
1248 }
1249 return 0;
1250 }
1251
1252 SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1253 const struct iovec __user *, vector, unsigned long, count)
1254 {
1255 if (unlikely(personality(current->personality) == PER_OSF4))
1256 if (osf_fix_iov_len(vector, count))
1257 return -EFAULT;
1258 return sys_readv(fd, vector, count);
1259 }
1260
1261 SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1262 const struct iovec __user *, vector, unsigned long, count)
1263 {
1264 if (unlikely(personality(current->personality) == PER_OSF4))
1265 if (osf_fix_iov_len(vector, count))
1266 return -EFAULT;
1267 return sys_writev(fd, vector, count);
1268 }
1269
1270 #endif
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