File: /usr/src/linux/arch/alpha/kernel/osf_sys.c
1 /*
2 * linux/arch/alpha/kernel/osf_sys.c
3 *
4 * Copyright (C) 1995 Linus Torvalds
5 */
6
7 /*
8 * This file handles some of the stranger OSF/1 system call interfaces.
9 * Some of the system calls expect a non-C calling standard, others have
10 * special parameter blocks..
11 */
12
13 #include <linux/errno.h>
14 #include <linux/sched.h>
15 #include <linux/kernel.h>
16 #include <linux/mm.h>
17 #include <linux/smp.h>
18 #include <linux/smp_lock.h>
19 #include <linux/stddef.h>
20 #include <linux/unistd.h>
21 #include <linux/ptrace.h>
22 #include <linux/slab.h>
23 #include <linux/user.h>
24 #include <linux/a.out.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
37 #include <asm/fpu.h>
38 #include <asm/io.h>
39 #include <asm/uaccess.h>
40 #include <asm/system.h>
41 #include <asm/sysinfo.h>
42 #include <asm/hwrpb.h>
43 #include <asm/processor.h>
44
45 extern int do_pipe(int *);
46
47 extern asmlinkage unsigned long sys_brk(unsigned long);
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 asmlinkage unsigned long 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 asmlinkage int osf_set_program_attributes(
67 unsigned long text_start, unsigned long text_len,
68 unsigned long bss_start, 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->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 unlock_kernel();
81 return 0;
82 }
83
84 /*
85 * OSF/1 directory handling functions...
86 *
87 * The "getdents()" interface is much more sane: the "basep" stuff is
88 * braindamage (it can't really handle filesystems where the directory
89 * offset differences aren't the same as "d_reclen").
90 */
91 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char *) (de)))
92 #define ROUND_UP(x) (((x)+3) & ~3)
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 *dirent;
103 long *basep;
104 int count;
105 int error;
106 };
107
108 static int osf_filldir(void *__buf, const char *name, int namlen, loff_t offset,
109 ino_t ino, unsigned int d_type)
110 {
111 struct osf_dirent *dirent;
112 struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf;
113 int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1);
114
115 buf->error = -EINVAL; /* only used if we fail */
116 if (reclen > buf->count)
117 return -EINVAL;
118 if (buf->basep) {
119 put_user(offset, buf->basep);
120 buf->basep = NULL;
121 }
122 dirent = buf->dirent;
123 put_user(ino, &dirent->d_ino);
124 put_user(namlen, &dirent->d_namlen);
125 put_user(reclen, &dirent->d_reclen);
126 copy_to_user(dirent->d_name, name, namlen);
127 put_user(0, dirent->d_name + namlen);
128 ((char *) dirent) += reclen;
129 buf->dirent = dirent;
130 buf->count -= reclen;
131 return 0;
132 }
133
134 asmlinkage int osf_getdirentries(unsigned int fd, struct osf_dirent *dirent,
135 unsigned int count, long *basep)
136 {
137 int error;
138 struct file *file;
139 struct osf_dirent_callback buf;
140
141 error = -EBADF;
142 file = fget(fd);
143 if (!file)
144 goto out;
145
146 buf.dirent = dirent;
147 buf.basep = basep;
148 buf.count = count;
149 buf.error = 0;
150
151 error = vfs_readdir(file, osf_filldir, &buf);
152 if (error < 0)
153 goto out_putf;
154
155 error = buf.error;
156 if (count != buf.count)
157 error = count - buf.count;
158
159 out_putf:
160 fput(file);
161 out:
162 return error;
163 }
164
165 #undef ROUND_UP
166 #undef NAME_OFFSET
167
168 /*
169 * Alpha syscall convention has no problem returning negative
170 * values:
171 */
172 asmlinkage int osf_getpriority(int which, int who, int a2, int a3, int a4,
173 int a5, struct pt_regs regs)
174 {
175 extern int sys_getpriority(int, int);
176 int prio;
177
178 /*
179 * We don't need to acquire the kernel lock here, because
180 * all of these operations are local. sys_getpriority
181 * will get the lock as required..
182 */
183 prio = sys_getpriority(which, who);
184 if (prio >= 0) {
185 regs.r0 = 0; /* special return: no errors */
186 prio = 20 - prio;
187 }
188 return prio;
189 }
190
191 /*
192 * No need to acquire the kernel lock, we're local..
193 */
194 asmlinkage unsigned long sys_getxuid(int a0, int a1, int a2, int a3, int a4,
195 int a5, struct pt_regs regs)
196 {
197 struct task_struct * tsk = current;
198 (®s)->r20 = tsk->euid;
199 return tsk->uid;
200 }
201
202 asmlinkage unsigned long sys_getxgid(int a0, int a1, int a2, int a3, int a4,
203 int a5, struct pt_regs regs)
204 {
205 struct task_struct * tsk = current;
206 (®s)->r20 = tsk->egid;
207 return tsk->gid;
208 }
209
210 asmlinkage unsigned long sys_getxpid(int a0, int a1, int a2, int a3, int a4,
211 int a5, struct pt_regs regs)
212 {
213 struct task_struct *tsk = current;
214
215 /*
216 * This isn't strictly "local" any more and we should actually
217 * acquire the kernel lock. The "p_opptr" pointer might change
218 * if the parent goes away (or due to ptrace). But any race
219 * isn't actually going to matter, as if the parent happens
220 * to change we can happily return either of the pids.
221 */
222 (®s)->r20 = tsk->p_opptr->pid;
223 return tsk->pid;
224 }
225
226 asmlinkage unsigned long osf_mmap(unsigned long addr, unsigned long len,
227 unsigned long prot, unsigned long flags, unsigned long fd,
228 unsigned long off)
229 {
230 struct file *file = NULL;
231 unsigned long ret = -EBADF;
232
233 #if 0
234 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
235 printk("%s: unimplemented OSF mmap flags %04lx\n",
236 current->comm, flags);
237 #endif
238 if (!(flags & MAP_ANONYMOUS)) {
239 file = fget(fd);
240 if (!file)
241 goto out;
242 }
243 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
244 down_write(¤t->mm->mmap_sem);
245 ret = do_mmap(file, addr, len, prot, flags, off);
246 up_write(¤t->mm->mmap_sem);
247 if (file)
248 fput(file);
249 out:
250 return ret;
251 }
252
253
254 /*
255 * The OSF/1 statfs structure is much larger, but this should
256 * match the beginning, at least.
257 */
258 struct osf_statfs {
259 short f_type;
260 short f_flags;
261 int f_fsize;
262 int f_bsize;
263 int f_blocks;
264 int f_bfree;
265 int f_bavail;
266 int f_files;
267 int f_ffree;
268 __kernel_fsid_t f_fsid;
269 } *osf_stat;
270
271 static int linux_to_osf_statfs(struct statfs *linux_stat, struct osf_statfs *osf_stat, unsigned long bufsiz)
272 {
273 struct osf_statfs tmp_stat;
274
275 tmp_stat.f_type = linux_stat->f_type;
276 tmp_stat.f_flags = 0; /* mount flags */
277 /* Linux doesn't provide a "fundamental filesystem block size": */
278 tmp_stat.f_fsize = linux_stat->f_bsize;
279 tmp_stat.f_bsize = linux_stat->f_bsize;
280 tmp_stat.f_blocks = linux_stat->f_blocks;
281 tmp_stat.f_bfree = linux_stat->f_bfree;
282 tmp_stat.f_bavail = linux_stat->f_bavail;
283 tmp_stat.f_files = linux_stat->f_files;
284 tmp_stat.f_ffree = linux_stat->f_ffree;
285 tmp_stat.f_fsid = linux_stat->f_fsid;
286 if (bufsiz > sizeof(tmp_stat))
287 bufsiz = sizeof(tmp_stat);
288 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
289 }
290
291 static int do_osf_statfs(struct dentry * dentry, struct osf_statfs *buffer, unsigned long bufsiz)
292 {
293 struct statfs linux_stat;
294 int error = vfs_statfs(dentry->d_inode->i_sb, &linux_stat);
295 if (!error)
296 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
297 return error;
298 }
299
300 asmlinkage int osf_statfs(char *path, struct osf_statfs *buffer, unsigned long bufsiz)
301 {
302 struct nameidata nd;
303 int retval;
304
305 retval = user_path_walk(path, &nd);
306 if (!retval) {
307 retval = do_osf_statfs(nd.dentry, buffer, bufsiz);
308 path_release(&nd);
309 }
310 return retval;
311 }
312
313 asmlinkage int osf_fstatfs(unsigned long fd, struct osf_statfs *buffer, unsigned long bufsiz)
314 {
315 struct file *file;
316 int retval;
317
318 retval = -EBADF;
319 file = fget(fd);
320 if (file) {
321 retval = do_osf_statfs(file->f_dentry, buffer, bufsiz);
322 fput(file);
323 }
324 return retval;
325 }
326
327 /*
328 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
329 *
330 * Although to be frank, neither are the native Linux/i386 ones..
331 */
332 struct ufs_args {
333 char *devname;
334 int flags;
335 uid_t exroot;
336 };
337
338 struct cdfs_args {
339 char *devname;
340 int flags;
341 uid_t exroot;
342 /*
343 * This has lots more here, which Linux handles with the option block
344 * but I'm too lazy to do the translation into ASCII.
345 */
346 };
347
348 struct procfs_args {
349 char *devname;
350 int flags;
351 uid_t exroot;
352 };
353
354 /*
355 * We can't actually handle ufs yet, so we translate UFS mounts to
356 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
357 * layout is so braindead it's a major headache doing it.
358 *
359 * Just how long ago was it written? OTOH our UFS driver may be still
360 * unhappy with OSF UFS. [CHECKME]
361 */
362 static int osf_ufs_mount(char *dirname, struct ufs_args *args, int flags)
363 {
364 int retval;
365 struct cdfs_args tmp;
366 char *devname;
367
368 retval = -EFAULT;
369 if (copy_from_user(&tmp, args, sizeof(tmp)))
370 goto out;
371 devname = getname(tmp.devname);
372 retval = PTR_ERR(devname);
373 if (IS_ERR(devname))
374 goto out;
375 retval = do_mount(devname, dirname, "ext2", flags, NULL);
376 putname(devname);
377 out:
378 return retval;
379 }
380
381 static int osf_cdfs_mount(char *dirname, struct cdfs_args *args, int flags)
382 {
383 int retval;
384 struct cdfs_args tmp;
385 char *devname;
386
387 retval = -EFAULT;
388 if (copy_from_user(&tmp, args, sizeof(tmp)))
389 goto out;
390 devname = getname(tmp.devname);
391 retval = PTR_ERR(devname);
392 if (IS_ERR(devname))
393 goto out;
394 retval = do_mount(devname, dirname, "iso9660", flags, NULL);
395 putname(devname);
396 out:
397 return retval;
398 }
399
400 static int osf_procfs_mount(char *dirname, struct procfs_args *args, int flags)
401 {
402 struct procfs_args tmp;
403
404 if (copy_from_user(&tmp, args, sizeof(tmp)))
405 return -EFAULT;
406
407 return do_mount("", dirname, "proc", flags, NULL);
408 }
409
410 asmlinkage int osf_mount(unsigned long typenr, char *path, int flag, void *data)
411 {
412 int retval = -EINVAL;
413 char *name;
414
415 lock_kernel();
416
417 name = getname(path);
418 retval = PTR_ERR(name);
419 if (IS_ERR(name))
420 goto out;
421 switch (typenr) {
422 case 1:
423 retval = osf_ufs_mount(name, (struct ufs_args *) data, flag);
424 break;
425 case 6:
426 retval = osf_cdfs_mount(name, (struct cdfs_args *) data, flag);
427 break;
428 case 9:
429 retval = osf_procfs_mount(name, (struct procfs_args *) data, flag);
430 break;
431 default:
432 printk("osf_mount(%ld, %x)\n", typenr, flag);
433 }
434 putname(name);
435 out:
436 unlock_kernel();
437 return retval;
438 }
439
440 asmlinkage int osf_utsname(char *name)
441 {
442 int error;
443
444 down_read(&uts_sem);
445 error = -EFAULT;
446 if (copy_to_user(name + 0, system_utsname.sysname, 32))
447 goto out;
448 if (copy_to_user(name + 32, system_utsname.nodename, 32))
449 goto out;
450 if (copy_to_user(name + 64, system_utsname.release, 32))
451 goto out;
452 if (copy_to_user(name + 96, system_utsname.version, 32))
453 goto out;
454 if (copy_to_user(name + 128, system_utsname.machine, 32))
455 goto out;
456
457 error = 0;
458 out:
459 up_read(&uts_sem);
460 return error;
461 }
462
463 asmlinkage int osf_swapon(const char *path, int flags, int lowat, int hiwat)
464 {
465 int ret;
466
467 /* for now, simply ignore lowat and hiwat... */
468 lock_kernel();
469 ret = sys_swapon(path, flags);
470 unlock_kernel();
471 return ret;
472 }
473
474 asmlinkage unsigned long sys_getpagesize(void)
475 {
476 return PAGE_SIZE;
477 }
478
479 asmlinkage unsigned long sys_getdtablesize(void)
480 {
481 return NR_OPEN;
482 }
483
484 asmlinkage int sys_pipe(int a0, int a1, int a2, int a3, int a4, int a5,
485 struct pt_regs regs)
486 {
487 int fd[2];
488 int error;
489
490 error = do_pipe(fd);
491 if (error)
492 goto out;
493 (®s)->r20 = fd[1];
494 error = fd[0];
495 out:
496 return error;
497 }
498
499 /*
500 * For compatibility with OSF/1 only. Use utsname(2) instead.
501 */
502 asmlinkage int osf_getdomainname(char *name, int namelen)
503 {
504 unsigned len;
505 int i, error;
506
507 error = verify_area(VERIFY_WRITE, name, namelen);
508 if (error)
509 goto out;
510
511 len = namelen;
512 if (namelen > 32)
513 len = 32;
514
515 down_read(&uts_sem);
516 for (i = 0; i < len; ++i) {
517 __put_user(system_utsname.domainname[i], name + i);
518 if (system_utsname.domainname[i] == '\0')
519 break;
520 }
521 up_read(&uts_sem);
522 out:
523 return error;
524 }
525
526
527 asmlinkage long osf_shmat(int shmid, void *shmaddr, int shmflg)
528 {
529 unsigned long raddr;
530 long err;
531
532 lock_kernel();
533 err = sys_shmat(shmid, shmaddr, shmflg, &raddr);
534 if (err)
535 goto out;
536 /*
537 * This works because all user-level addresses are
538 * non-negative longs!
539 */
540 err = raddr;
541 out:
542 unlock_kernel();
543 return err;
544 }
545
546
547 /*
548 * The following stuff should move into a header file should it ever
549 * be labeled "officially supported." Right now, there is just enough
550 * support to avoid applications (such as tar) printing error
551 * messages. The attributes are not really implemented.
552 */
553
554 /*
555 * Values for Property list entry flag
556 */
557 #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
558 by default */
559 #define PLE_FLAG_MASK 0x1 /* Valid flag values */
560 #define PLE_FLAG_ALL -1 /* All flag value */
561
562 struct proplistname_args {
563 unsigned int pl_mask;
564 unsigned int pl_numnames;
565 char **pl_names;
566 };
567
568 union pl_args {
569 struct setargs {
570 char *path;
571 long follow;
572 long nbytes;
573 char *buf;
574 } set;
575 struct fsetargs {
576 long fd;
577 long nbytes;
578 char *buf;
579 } fset;
580 struct getargs {
581 char *path;
582 long follow;
583 struct proplistname_args *name_args;
584 long nbytes;
585 char *buf;
586 int *min_buf_size;
587 } get;
588 struct fgetargs {
589 long fd;
590 struct proplistname_args *name_args;
591 long nbytes;
592 char *buf;
593 int *min_buf_size;
594 } fget;
595 struct delargs {
596 char *path;
597 long follow;
598 struct proplistname_args *name_args;
599 } del;
600 struct fdelargs {
601 long fd;
602 struct proplistname_args *name_args;
603 } fdel;
604 };
605
606 enum pl_code {
607 PL_SET = 1, PL_FSET = 2,
608 PL_GET = 3, PL_FGET = 4,
609 PL_DEL = 5, PL_FDEL = 6
610 };
611
612 asmlinkage long osf_proplist_syscall(enum pl_code code, union pl_args *args)
613 {
614 long error;
615 int *min_buf_size_ptr;
616
617 lock_kernel();
618 switch (code) {
619 case PL_SET:
620 error = verify_area(VERIFY_READ, &args->set.nbytes,
621 sizeof(args->set.nbytes));
622 if (!error)
623 error = args->set.nbytes;
624 break;
625 case PL_FSET:
626 error = verify_area(VERIFY_READ, &args->fset.nbytes,
627 sizeof(args->fset.nbytes));
628 if (!error)
629 error = args->fset.nbytes;
630 break;
631 case PL_GET:
632 get_user(min_buf_size_ptr, &args->get.min_buf_size);
633 error = verify_area(VERIFY_WRITE, min_buf_size_ptr,
634 sizeof(*min_buf_size_ptr));
635 if (!error)
636 put_user(0, min_buf_size_ptr);
637 break;
638 case PL_FGET:
639 get_user(min_buf_size_ptr, &args->fget.min_buf_size);
640 error = verify_area(VERIFY_WRITE, min_buf_size_ptr,
641 sizeof(*min_buf_size_ptr));
642 if (!error)
643 put_user(0, min_buf_size_ptr);
644 break;
645 case PL_DEL:
646 case PL_FDEL:
647 error = 0;
648 break;
649 default:
650 error = -EOPNOTSUPP;
651 break;
652 };
653 unlock_kernel();
654 return error;
655 }
656
657 asmlinkage int osf_sigstack(struct sigstack *uss, struct sigstack *uoss)
658 {
659 unsigned long usp = rdusp();
660 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
661 unsigned long oss_os = on_sig_stack(usp);
662 int error;
663
664 if (uss) {
665 void *ss_sp;
666
667 error = -EFAULT;
668 if (get_user(ss_sp, &uss->ss_sp))
669 goto out;
670
671 /* If the current stack was set with sigaltstack, don't
672 swap stacks while we are on it. */
673 error = -EPERM;
674 if (current->sas_ss_sp && on_sig_stack(usp))
675 goto out;
676
677 /* Since we don't know the extent of the stack, and we don't
678 track onstack-ness, but rather calculate it, we must
679 presume a size. Ho hum this interface is lossy. */
680 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
681 current->sas_ss_size = SIGSTKSZ;
682 }
683
684 if (uoss) {
685 error = -EFAULT;
686 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
687 || __put_user(oss_sp, &uoss->ss_sp)
688 || __put_user(oss_os, &uoss->ss_onstack))
689 goto out;
690 }
691
692 error = 0;
693 out:
694 return error;
695 }
696
697 /*
698 * The Linux kernel isn't good at returning values that look
699 * like negative longs (they are mistaken as error values).
700 * Until that is fixed, we need this little workaround for
701 * create_module() because it's one of the few system calls
702 * that return kernel addresses (which are negative).
703 */
704 asmlinkage unsigned long alpha_create_module(char *module_name, unsigned long size,
705 int a3, int a4, int a5, int a6,
706 struct pt_regs regs)
707 {
708 asmlinkage unsigned long sys_create_module(char *, unsigned long);
709 long retval;
710
711 lock_kernel();
712 retval = sys_create_module(module_name, size);
713 /*
714 * we get either a module address or an error number,
715 * and we know the error number is a small negative
716 * number, while the address is always negative but
717 * much larger.
718 */
719 if (retval + 1000 > 0)
720 goto out;
721
722 /* tell entry.S:syscall_error that this is NOT an error: */
723 regs.r0 = 0;
724 out:
725 unlock_kernel();
726 return retval;
727 }
728
729 asmlinkage long osf_sysinfo(int command, char *buf, long count)
730 {
731 static char * sysinfo_table[] = {
732 system_utsname.sysname,
733 system_utsname.nodename,
734 system_utsname.release,
735 system_utsname.version,
736 system_utsname.machine,
737 "alpha", /* instruction set architecture */
738 "dummy", /* hardware serial number */
739 "dummy", /* hardware manufacturer */
740 "dummy", /* secure RPC domain */
741 };
742 unsigned long offset;
743 char *res;
744 long len, err = -EINVAL;
745
746 offset = command-1;
747 if (offset >= sizeof(sysinfo_table)/sizeof(char *)) {
748 /* Digital UNIX has a few unpublished interfaces here */
749 printk("sysinfo(%d)", command);
750 goto out;
751 }
752
753 down_read(&uts_sem);
754 res = sysinfo_table[offset];
755 len = strlen(res)+1;
756 if (len > count)
757 len = count;
758 if (copy_to_user(buf, res, len))
759 err = -EFAULT;
760 else
761 err = 0;
762 up_read(&uts_sem);
763 out:
764 return err;
765 }
766
767 asmlinkage unsigned long osf_getsysinfo(unsigned long op, void *buffer,
768 unsigned long nbytes,
769 int *start, void *arg)
770 {
771 unsigned long w;
772 struct percpu_struct *cpu;
773
774 switch (op) {
775 case GSI_IEEE_FP_CONTROL:
776 /* Return current software fp control & status bits. */
777 /* Note that DU doesn't verify available space here. */
778
779 w = current->thread.flags & IEEE_SW_MASK;
780 w = swcr_update_status(w, rdfpcr());
781 if (put_user(w, (unsigned long *) buffer))
782 return -EFAULT;
783 return 0;
784
785 case GSI_IEEE_STATE_AT_SIGNAL:
786 /*
787 * Not sure anybody will ever use this weird stuff. These
788 * ops can be used (under OSF/1) to set the fpcr that should
789 * be used when a signal handler starts executing.
790 */
791 break;
792
793 case GSI_UACPROC:
794 if (nbytes < sizeof(unsigned int))
795 return -EINVAL;
796 w = (current->thread.flags >> UAC_SHIFT) & UAC_BITMASK;
797 if (put_user(w, (unsigned int *)buffer))
798 return -EFAULT;
799 return 1;
800
801 case GSI_PROC_TYPE:
802 if (nbytes < sizeof(unsigned long))
803 return -EINVAL;
804 cpu = (struct percpu_struct*)
805 ((char*)hwrpb + hwrpb->processor_offset);
806 w = cpu->type;
807 if (put_user(w, (unsigned long *)buffer))
808 return -EFAULT;
809 return 1;
810
811 case GSI_GET_HWRPB:
812 if (nbytes < sizeof(*hwrpb))
813 return -EINVAL;
814 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
815 return -EFAULT;
816 return 1;
817
818 default:
819 break;
820 }
821
822 return -EOPNOTSUPP;
823 }
824
825 asmlinkage unsigned long osf_setsysinfo(unsigned long op, void *buffer,
826 unsigned long nbytes,
827 int *start, void *arg)
828 {
829 switch (op) {
830 case SSI_IEEE_FP_CONTROL: {
831 unsigned long swcr, fpcr;
832
833 /*
834 * Alpha Architecture Handbook 4.7.7.3:
835 * To be fully IEEE compiant, we must track the current IEEE
836 * exception state in software, because spurrious bits can be
837 * set in the trap shadow of a software-complete insn.
838 */
839
840 /* Update softare trap enable bits. */
841 if (get_user(swcr, (unsigned long *)buffer))
842 return -EFAULT;
843 current->thread.flags &= ~IEEE_SW_MASK;
844 current->thread.flags |= swcr & IEEE_SW_MASK;
845
846 /* Update the real fpcr. */
847 fpcr = rdfpcr();
848 fpcr &= FPCR_DYN_MASK;
849 fpcr |= ieee_swcr_to_fpcr(swcr);
850 wrfpcr(fpcr);
851
852 /* If any exceptions are now unmasked, send a signal. */
853 if (((swcr & IEEE_STATUS_MASK)
854 >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr) {
855 send_sig(SIGFPE, current, 1);
856 }
857
858 return 0;
859 }
860
861 case SSI_IEEE_STATE_AT_SIGNAL:
862 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
863 /*
864 * Not sure anybody will ever use this weird stuff. These
865 * ops can be used (under OSF/1) to set the fpcr that should
866 * be used when a signal handler starts executing.
867 */
868 break;
869
870 case SSI_NVPAIRS: {
871 unsigned long v, w, i;
872
873 for (i = 0; i < nbytes; ++i) {
874 if (get_user(v, 2*i + (unsigned int *)buffer))
875 return -EFAULT;
876 if (get_user(w, 2*i + 1 + (unsigned int *)buffer))
877 return -EFAULT;
878 switch (v) {
879 case SSIN_UACPROC:
880 current->thread.flags &=
881 ~(UAC_BITMASK << UAC_SHIFT);
882 current->thread.flags |=
883 (w & UAC_BITMASK) << UAC_SHIFT;
884 break;
885
886 default:
887 return -EOPNOTSUPP;
888 }
889 }
890 return 0;
891 }
892
893 default:
894 break;
895 }
896
897 return -EOPNOTSUPP;
898 }
899
900 /* Translations due to the fact that OSF's time_t is an int. Which
901 affects all sorts of things, like timeval and itimerval. */
902
903 extern struct timezone sys_tz;
904 extern int do_sys_settimeofday(struct timeval *tv, struct timezone *tz);
905 extern int do_getitimer(int which, struct itimerval *value);
906 extern int do_setitimer(int which, struct itimerval *, struct itimerval *);
907 asmlinkage int sys_utimes(char *, struct timeval *);
908 extern int do_adjtimex(struct timex *);
909
910 struct timeval32
911 {
912 int tv_sec, tv_usec;
913 };
914
915 struct itimerval32
916 {
917 struct timeval32 it_interval;
918 struct timeval32 it_value;
919 };
920
921 static inline long get_tv32(struct timeval *o, struct timeval32 *i)
922 {
923 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
924 (__get_user(o->tv_sec, &i->tv_sec) |
925 __get_user(o->tv_usec, &i->tv_usec)));
926 }
927
928 static inline long put_tv32(struct timeval32 *o, struct timeval *i)
929 {
930 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
931 (__put_user(i->tv_sec, &o->tv_sec) |
932 __put_user(i->tv_usec, &o->tv_usec)));
933 }
934
935 static inline long get_it32(struct itimerval *o, struct itimerval32 *i)
936 {
937 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
938 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
939 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
940 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
941 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
942 }
943
944 static inline long put_it32(struct itimerval32 *o, struct itimerval *i)
945 {
946 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
947 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
948 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
949 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
950 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
951 }
952
953 asmlinkage int osf_gettimeofday(struct timeval32 *tv, struct timezone *tz)
954 {
955 if (tv) {
956 struct timeval ktv;
957 do_gettimeofday(&ktv);
958 if (put_tv32(tv, &ktv))
959 return -EFAULT;
960 }
961 if (tz) {
962 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
963 return -EFAULT;
964 }
965 return 0;
966 }
967
968 asmlinkage int osf_settimeofday(struct timeval32 *tv, struct timezone *tz)
969 {
970 struct timeval ktv;
971 struct timezone ktz;
972
973 if (tv) {
974 if (get_tv32(&ktv, tv))
975 return -EFAULT;
976 }
977 if (tz) {
978 if (copy_from_user(&ktz, tz, sizeof(*tz)))
979 return -EFAULT;
980 }
981
982 return do_sys_settimeofday(tv ? &ktv : NULL, tz ? &ktz : NULL);
983 }
984
985 asmlinkage int osf_getitimer(int which, struct itimerval32 *it)
986 {
987 struct itimerval kit;
988 int error;
989
990 error = do_getitimer(which, &kit);
991 if (!error && put_it32(it, &kit))
992 error = -EFAULT;
993
994 return error;
995 }
996
997 asmlinkage int osf_setitimer(int which, struct itimerval32 *in,
998 struct itimerval32 *out)
999 {
1000 struct itimerval kin, kout;
1001 int error;
1002
1003 if (in) {
1004 if (get_it32(&kin, in))
1005 return -EFAULT;
1006 } else
1007 memset(&kin, 0, sizeof(kin));
1008
1009 error = do_setitimer(which, &kin, out ? &kout : NULL);
1010 if (error || !out)
1011 return error;
1012
1013 if (put_it32(out, &kout))
1014 return -EFAULT;
1015
1016 return 0;
1017
1018 }
1019
1020 asmlinkage int osf_utimes(const char *filename, struct timeval32 *tvs)
1021 {
1022 char *kfilename;
1023 struct timeval ktvs[2];
1024 mm_segment_t old_fs;
1025 int ret;
1026
1027 kfilename = getname(filename);
1028 if (IS_ERR(kfilename))
1029 return PTR_ERR(kfilename);
1030
1031 if (tvs) {
1032 if (get_tv32(&ktvs[0], &tvs[0]) ||
1033 get_tv32(&ktvs[1], &tvs[1]))
1034 return -EFAULT;
1035 }
1036
1037 old_fs = get_fs();
1038 set_fs(KERNEL_DS);
1039 ret = sys_utimes(kfilename, tvs ? ktvs : 0);
1040 set_fs(old_fs);
1041
1042 putname(kfilename);
1043
1044 return ret;
1045 }
1046
1047 #define MAX_SELECT_SECONDS \
1048 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1049
1050 asmlinkage int
1051 osf_select(int n, fd_set *inp, fd_set *outp, fd_set *exp,
1052 struct timeval32 *tvp)
1053 {
1054 fd_set_bits fds;
1055 char *bits;
1056 size_t size;
1057 unsigned long timeout;
1058 int ret;
1059
1060 timeout = MAX_SCHEDULE_TIMEOUT;
1061 if (tvp) {
1062 time_t sec, usec;
1063
1064 if ((ret = verify_area(VERIFY_READ, tvp, sizeof(*tvp)))
1065 || (ret = __get_user(sec, &tvp->tv_sec))
1066 || (ret = __get_user(usec, &tvp->tv_usec)))
1067 goto out_nofds;
1068
1069 ret = -EINVAL;
1070 if (sec < 0 || usec < 0)
1071 goto out_nofds;
1072
1073 if ((unsigned long) sec < MAX_SELECT_SECONDS) {
1074 timeout = (usec + 1000000/HZ - 1) / (1000000/HZ);
1075 timeout += sec * (unsigned long) HZ;
1076 }
1077 }
1078
1079 ret = -EINVAL;
1080 if (n < 0 || n > current->files->max_fdset)
1081 goto out_nofds;
1082
1083 /*
1084 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1085 * since we used fdset we need to allocate memory in units of
1086 * long-words.
1087 */
1088 ret = -ENOMEM;
1089 size = FDS_BYTES(n);
1090 bits = kmalloc(6 * size, GFP_KERNEL);
1091 if (!bits)
1092 goto out_nofds;
1093 fds.in = (unsigned long *) bits;
1094 fds.out = (unsigned long *) (bits + size);
1095 fds.ex = (unsigned long *) (bits + 2*size);
1096 fds.res_in = (unsigned long *) (bits + 3*size);
1097 fds.res_out = (unsigned long *) (bits + 4*size);
1098 fds.res_ex = (unsigned long *) (bits + 5*size);
1099
1100 if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) ||
1101 (ret = get_fd_set(n, outp->fds_bits, fds.out)) ||
1102 (ret = get_fd_set(n, exp->fds_bits, fds.ex)))
1103 goto out;
1104 zero_fd_set(n, fds.res_in);
1105 zero_fd_set(n, fds.res_out);
1106 zero_fd_set(n, fds.res_ex);
1107
1108 ret = do_select(n, &fds, &timeout);
1109
1110 /* OSF does not copy back the remaining time. */
1111
1112 if (ret < 0)
1113 goto out;
1114 if (!ret) {
1115 ret = -ERESTARTNOHAND;
1116 if (signal_pending(current))
1117 goto out;
1118 ret = 0;
1119 }
1120
1121 set_fd_set(n, inp->fds_bits, fds.res_in);
1122 set_fd_set(n, outp->fds_bits, fds.res_out);
1123 set_fd_set(n, exp->fds_bits, fds.res_ex);
1124
1125 out:
1126 kfree(bits);
1127 out_nofds:
1128 return ret;
1129 }
1130
1131 struct rusage32 {
1132 struct timeval32 ru_utime; /* user time used */
1133 struct timeval32 ru_stime; /* system time used */
1134 long ru_maxrss; /* maximum resident set size */
1135 long ru_ixrss; /* integral shared memory size */
1136 long ru_idrss; /* integral unshared data size */
1137 long ru_isrss; /* integral unshared stack size */
1138 long ru_minflt; /* page reclaims */
1139 long ru_majflt; /* page faults */
1140 long ru_nswap; /* swaps */
1141 long ru_inblock; /* block input operations */
1142 long ru_oublock; /* block output operations */
1143 long ru_msgsnd; /* messages sent */
1144 long ru_msgrcv; /* messages received */
1145 long ru_nsignals; /* signals received */
1146 long ru_nvcsw; /* voluntary context switches */
1147 long ru_nivcsw; /* involuntary " */
1148 };
1149
1150 asmlinkage int osf_getrusage(int who, struct rusage32 *ru)
1151 {
1152 struct rusage32 r;
1153
1154 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1155 return -EINVAL;
1156
1157 memset(&r, 0, sizeof(r));
1158 switch (who) {
1159 case RUSAGE_SELF:
1160 r.ru_utime.tv_sec = CT_TO_SECS(current->times.tms_utime);
1161 r.ru_utime.tv_usec = CT_TO_USECS(current->times.tms_utime);
1162 r.ru_stime.tv_sec = CT_TO_SECS(current->times.tms_stime);
1163 r.ru_stime.tv_usec = CT_TO_USECS(current->times.tms_stime);
1164 r.ru_minflt = current->min_flt;
1165 r.ru_majflt = current->maj_flt;
1166 r.ru_nswap = current->nswap;
1167 break;
1168 case RUSAGE_CHILDREN:
1169 r.ru_utime.tv_sec = CT_TO_SECS(current->times.tms_cutime);
1170 r.ru_utime.tv_usec = CT_TO_USECS(current->times.tms_cutime);
1171 r.ru_stime.tv_sec = CT_TO_SECS(current->times.tms_cstime);
1172 r.ru_stime.tv_usec = CT_TO_USECS(current->times.tms_cstime);
1173 r.ru_minflt = current->cmin_flt;
1174 r.ru_majflt = current->cmaj_flt;
1175 r.ru_nswap = current->cnswap;
1176 break;
1177 default:
1178 r.ru_utime.tv_sec = CT_TO_SECS(current->times.tms_utime +
1179 current->times.tms_cutime);
1180 r.ru_utime.tv_usec = CT_TO_USECS(current->times.tms_utime +
1181 current->times.tms_cutime);
1182 r.ru_stime.tv_sec = CT_TO_SECS(current->times.tms_stime +
1183 current->times.tms_cstime);
1184 r.ru_stime.tv_usec = CT_TO_USECS(current->times.tms_stime +
1185 current->times.tms_cstime);
1186 r.ru_minflt = current->min_flt + current->cmin_flt;
1187 r.ru_majflt = current->maj_flt + current->cmaj_flt;
1188 r.ru_nswap = current->nswap + current->cnswap;
1189 break;
1190 }
1191
1192 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1193 }
1194
1195 asmlinkage int osf_wait4(pid_t pid, int *ustatus, int options,
1196 struct rusage32 *ur)
1197 {
1198 if (!ur) {
1199 return sys_wait4(pid, ustatus, options, NULL);
1200 } else {
1201 struct rusage r;
1202 int ret, status;
1203 mm_segment_t old_fs = get_fs();
1204
1205 set_fs (KERNEL_DS);
1206 ret = sys_wait4(pid, &status, options, &r);
1207 set_fs (old_fs);
1208
1209 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1210 return -EFAULT;
1211 __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1212 __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1213 __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1214 __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1215 __put_user(r.ru_maxrss, &ur->ru_maxrss);
1216 __put_user(r.ru_ixrss, &ur->ru_ixrss);
1217 __put_user(r.ru_idrss, &ur->ru_idrss);
1218 __put_user(r.ru_isrss, &ur->ru_isrss);
1219 __put_user(r.ru_minflt, &ur->ru_minflt);
1220 __put_user(r.ru_majflt, &ur->ru_majflt);
1221 __put_user(r.ru_nswap, &ur->ru_nswap);
1222 __put_user(r.ru_inblock, &ur->ru_inblock);
1223 __put_user(r.ru_oublock, &ur->ru_oublock);
1224 __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1225 __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1226 __put_user(r.ru_nsignals, &ur->ru_nsignals);
1227 __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1228 if (__put_user(r.ru_nivcsw, &ur->ru_nivcsw))
1229 return -EFAULT;
1230
1231 if (ustatus && put_user(status, ustatus))
1232 return -EFAULT;
1233 return ret;
1234 }
1235 }
1236
1237 /*
1238 * I don't know what the parameters are: the first one
1239 * seems to be a timeval pointer, and I suspect the second
1240 * one is the time remaining.. Ho humm.. No documentation.
1241 */
1242 asmlinkage int osf_usleep_thread(struct timeval32 *sleep, struct timeval32 *remain)
1243 {
1244 struct timeval tmp;
1245 unsigned long ticks;
1246
1247 if (get_tv32(&tmp, sleep))
1248 goto fault;
1249
1250 ticks = tmp.tv_usec;
1251 ticks = (ticks + (1000000 / HZ) - 1) / (1000000 / HZ);
1252 ticks += tmp.tv_sec * HZ;
1253
1254 current->state = TASK_INTERRUPTIBLE;
1255 ticks = schedule_timeout(ticks);
1256
1257 if (remain) {
1258 tmp.tv_sec = ticks / HZ;
1259 tmp.tv_usec = ticks % HZ;
1260 if (put_tv32(remain, &tmp))
1261 goto fault;
1262 }
1263
1264 return 0;
1265 fault:
1266 return -EFAULT;
1267 }
1268
1269
1270 struct timex32 {
1271 unsigned int modes; /* mode selector */
1272 long offset; /* time offset (usec) */
1273 long freq; /* frequency offset (scaled ppm) */
1274 long maxerror; /* maximum error (usec) */
1275 long esterror; /* estimated error (usec) */
1276 int status; /* clock command/status */
1277 long constant; /* pll time constant */
1278 long precision; /* clock precision (usec) (read only) */
1279 long tolerance; /* clock frequency tolerance (ppm)
1280 * (read only)
1281 */
1282 struct timeval32 time; /* (read only) */
1283 long tick; /* (modified) usecs between clock ticks */
1284
1285 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1286 long jitter; /* pps jitter (us) (ro) */
1287 int shift; /* interval duration (s) (shift) (ro) */
1288 long stabil; /* pps stability (scaled ppm) (ro) */
1289 long jitcnt; /* jitter limit exceeded (ro) */
1290 long calcnt; /* calibration intervals (ro) */
1291 long errcnt; /* calibration errors (ro) */
1292 long stbcnt; /* stability limit exceeded (ro) */
1293
1294 int :32; int :32; int :32; int :32;
1295 int :32; int :32; int :32; int :32;
1296 int :32; int :32; int :32; int :32;
1297 };
1298
1299 asmlinkage int sys_old_adjtimex(struct timex32 *txc_p)
1300 {
1301 struct timex txc;
1302 int ret;
1303
1304 /* copy relevant bits of struct timex. */
1305 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1306 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1307 offsetof(struct timex32, time)))
1308 return -EFAULT;
1309
1310 ret = do_adjtimex(&txc);
1311 if (ret < 0)
1312 return ret;
1313
1314 /* copy back to timex32 */
1315 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1316 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1317 offsetof(struct timex32, tick))) ||
1318 (put_tv32(&txc_p->time, &txc.time)))
1319 return -EFAULT;
1320
1321 return ret;
1322 }
1323