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[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / alpha / kernel / osf_sys.c
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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/sysinfo.h>
44#include <asm/thread_info.h>
45#include <asm/hwrpb.h>
46#include <asm/processor.h>
47
48/*
49 * Brk needs to return an error. Still support Linux's brk(0) query idiom,
50 * which OSF programs just shouldn't be doing. We're still not quite
51 * identical to OSF as we don't return 0 on success, but doing otherwise
52 * would require changes to libc. Hopefully this is good enough.
53 */
54SYSCALL_DEFINE1(osf_brk, unsigned long, brk)
55{
56 unsigned long retval = sys_brk(brk);
57 if (brk && brk != retval)
58 retval = -ENOMEM;
59 return retval;
60}
61
62/*
63 * This is pure guess-work..
64 */
65SYSCALL_DEFINE4(osf_set_program_attributes, unsigned long, text_start,
66 unsigned long, text_len, unsigned long, bss_start,
67 unsigned long, bss_len)
68{
69 struct mm_struct *mm;
70
71 mm = current->mm;
72 mm->end_code = bss_start + bss_len;
73 mm->start_brk = bss_start + bss_len;
74 mm->brk = bss_start + bss_len;
75#if 0
76 printk("set_program_attributes(%lx %lx %lx %lx)\n",
77 text_start, text_len, bss_start, bss_len);
78#endif
79 return 0;
80}
81
82/*
83 * OSF/1 directory handling functions...
84 *
85 * The "getdents()" interface is much more sane: the "basep" stuff is
86 * braindamage (it can't really handle filesystems where the directory
87 * offset differences aren't the same as "d_reclen").
88 */
89#define NAME_OFFSET offsetof (struct osf_dirent, d_name)
90
91struct osf_dirent {
92 unsigned int d_ino;
93 unsigned short d_reclen;
94 unsigned short d_namlen;
95 char d_name[1];
96};
97
98struct osf_dirent_callback {
99 struct dir_context ctx;
100 struct osf_dirent __user *dirent;
101 long __user *basep;
102 unsigned int count;
103 int error;
104};
105
106static int
107osf_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;
139Efault:
140 buf->error = -EFAULT;
141 return -EFAULT;
142}
143
144SYSCALL_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 fd arg = fdget(fd);
150 struct osf_dirent_callback buf;
151
152 if (!arg.file)
153 return -EBADF;
154
155 buf.dirent = dirent;
156 buf.basep = basep;
157 buf.count = count;
158 buf.error = 0;
159 buf.ctx.actor = osf_filldir;
160
161 error = iterate_dir(arg.file, &buf.ctx);
162 if (error >= 0)
163 error = buf.error;
164 if (count != buf.count)
165 error = count - buf.count;
166
167 fdput(arg);
168 return error;
169}
170
171#undef NAME_OFFSET
172
173SYSCALL_DEFINE6(osf_mmap, unsigned long, addr, unsigned long, len,
174 unsigned long, prot, unsigned long, flags, unsigned long, fd,
175 unsigned long, off)
176{
177 unsigned long ret = -EINVAL;
178
179#if 0
180 if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED))
181 printk("%s: unimplemented OSF mmap flags %04lx\n",
182 current->comm, flags);
183#endif
184 if ((off + PAGE_ALIGN(len)) < off)
185 goto out;
186 if (off & ~PAGE_MASK)
187 goto out;
188 ret = sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
189 out:
190 return ret;
191}
192
193struct osf_stat {
194 int st_dev;
195 int st_pad1;
196 unsigned st_mode;
197 unsigned short st_nlink;
198 short st_nlink_reserved;
199 unsigned st_uid;
200 unsigned st_gid;
201 int st_rdev;
202 int st_ldev;
203 long st_size;
204 int st_pad2;
205 int st_uatime;
206 int st_pad3;
207 int st_umtime;
208 int st_pad4;
209 int st_uctime;
210 int st_pad5;
211 int st_pad6;
212 unsigned st_flags;
213 unsigned st_gen;
214 long st_spare[4];
215 unsigned st_ino;
216 int st_ino_reserved;
217 int st_atime;
218 int st_atime_reserved;
219 int st_mtime;
220 int st_mtime_reserved;
221 int st_ctime;
222 int st_ctime_reserved;
223 long st_blksize;
224 long st_blocks;
225};
226
227/*
228 * The OSF/1 statfs structure is much larger, but this should
229 * match the beginning, at least.
230 */
231struct osf_statfs {
232 short f_type;
233 short f_flags;
234 int f_fsize;
235 int f_bsize;
236 int f_blocks;
237 int f_bfree;
238 int f_bavail;
239 int f_files;
240 int f_ffree;
241 __kernel_fsid_t f_fsid;
242};
243
244struct osf_statfs64 {
245 short f_type;
246 short f_flags;
247 int f_pad1;
248 int f_pad2;
249 int f_pad3;
250 int f_pad4;
251 int f_pad5;
252 int f_pad6;
253 int f_pad7;
254 __kernel_fsid_t f_fsid;
255 u_short f_namemax;
256 short f_reserved1;
257 int f_spare[8];
258 char f_pad8[90];
259 char f_pad9[90];
260 long mount_info[10];
261 u_long f_flags2;
262 long f_spare2[14];
263 long f_fsize;
264 long f_bsize;
265 long f_blocks;
266 long f_bfree;
267 long f_bavail;
268 long f_files;
269 long f_ffree;
270};
271
272static int
273linux_to_osf_stat(struct kstat *lstat, struct osf_stat __user *osf_stat)
274{
275 struct osf_stat tmp = { 0 };
276
277 tmp.st_dev = lstat->dev;
278 tmp.st_mode = lstat->mode;
279 tmp.st_nlink = lstat->nlink;
280 tmp.st_uid = from_kuid_munged(current_user_ns(), lstat->uid);
281 tmp.st_gid = from_kgid_munged(current_user_ns(), lstat->gid);
282 tmp.st_rdev = lstat->rdev;
283 tmp.st_ldev = lstat->rdev;
284 tmp.st_size = lstat->size;
285 tmp.st_uatime = lstat->atime.tv_nsec / 1000;
286 tmp.st_umtime = lstat->mtime.tv_nsec / 1000;
287 tmp.st_uctime = lstat->ctime.tv_nsec / 1000;
288 tmp.st_ino = lstat->ino;
289 tmp.st_atime = lstat->atime.tv_sec;
290 tmp.st_mtime = lstat->mtime.tv_sec;
291 tmp.st_ctime = lstat->ctime.tv_sec;
292 tmp.st_blksize = lstat->blksize;
293 tmp.st_blocks = lstat->blocks;
294
295 return copy_to_user(osf_stat, &tmp, sizeof(tmp)) ? -EFAULT : 0;
296}
297
298static int
299linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat,
300 unsigned long bufsiz)
301{
302 struct osf_statfs tmp_stat;
303
304 tmp_stat.f_type = linux_stat->f_type;
305 tmp_stat.f_flags = 0; /* mount flags */
306 tmp_stat.f_fsize = linux_stat->f_frsize;
307 tmp_stat.f_bsize = linux_stat->f_bsize;
308 tmp_stat.f_blocks = linux_stat->f_blocks;
309 tmp_stat.f_bfree = linux_stat->f_bfree;
310 tmp_stat.f_bavail = linux_stat->f_bavail;
311 tmp_stat.f_files = linux_stat->f_files;
312 tmp_stat.f_ffree = linux_stat->f_ffree;
313 tmp_stat.f_fsid = linux_stat->f_fsid;
314 if (bufsiz > sizeof(tmp_stat))
315 bufsiz = sizeof(tmp_stat);
316 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
317}
318
319static int
320linux_to_osf_statfs64(struct kstatfs *linux_stat, struct osf_statfs64 __user *osf_stat,
321 unsigned long bufsiz)
322{
323 struct osf_statfs64 tmp_stat = { 0 };
324
325 tmp_stat.f_type = linux_stat->f_type;
326 tmp_stat.f_fsize = linux_stat->f_frsize;
327 tmp_stat.f_bsize = linux_stat->f_bsize;
328 tmp_stat.f_blocks = linux_stat->f_blocks;
329 tmp_stat.f_bfree = linux_stat->f_bfree;
330 tmp_stat.f_bavail = linux_stat->f_bavail;
331 tmp_stat.f_files = linux_stat->f_files;
332 tmp_stat.f_ffree = linux_stat->f_ffree;
333 tmp_stat.f_fsid = linux_stat->f_fsid;
334 if (bufsiz > sizeof(tmp_stat))
335 bufsiz = sizeof(tmp_stat);
336 return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0;
337}
338
339SYSCALL_DEFINE3(osf_statfs, const char __user *, pathname,
340 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
341{
342 struct kstatfs linux_stat;
343 int error = user_statfs(pathname, &linux_stat);
344 if (!error)
345 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
346 return error;
347}
348
349SYSCALL_DEFINE2(osf_stat, char __user *, name, struct osf_stat __user *, buf)
350{
351 struct kstat stat;
352 int error;
353
354 error = vfs_stat(name, &stat);
355 if (error)
356 return error;
357
358 return linux_to_osf_stat(&stat, buf);
359}
360
361SYSCALL_DEFINE2(osf_lstat, char __user *, name, struct osf_stat __user *, buf)
362{
363 struct kstat stat;
364 int error;
365
366 error = vfs_lstat(name, &stat);
367 if (error)
368 return error;
369
370 return linux_to_osf_stat(&stat, buf);
371}
372
373SYSCALL_DEFINE2(osf_fstat, int, fd, struct osf_stat __user *, buf)
374{
375 struct kstat stat;
376 int error;
377
378 error = vfs_fstat(fd, &stat);
379 if (error)
380 return error;
381
382 return linux_to_osf_stat(&stat, buf);
383}
384
385SYSCALL_DEFINE3(osf_fstatfs, unsigned long, fd,
386 struct osf_statfs __user *, buffer, unsigned long, bufsiz)
387{
388 struct kstatfs linux_stat;
389 int error = fd_statfs(fd, &linux_stat);
390 if (!error)
391 error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz);
392 return error;
393}
394
395SYSCALL_DEFINE3(osf_statfs64, char __user *, pathname,
396 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
397{
398 struct kstatfs linux_stat;
399 int error = user_statfs(pathname, &linux_stat);
400 if (!error)
401 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
402 return error;
403}
404
405SYSCALL_DEFINE3(osf_fstatfs64, unsigned long, fd,
406 struct osf_statfs64 __user *, buffer, unsigned long, bufsiz)
407{
408 struct kstatfs linux_stat;
409 int error = fd_statfs(fd, &linux_stat);
410 if (!error)
411 error = linux_to_osf_statfs64(&linux_stat, buffer, bufsiz);
412 return error;
413}
414
415/*
416 * Uhh.. OSF/1 mount parameters aren't exactly obvious..
417 *
418 * Although to be frank, neither are the native Linux/i386 ones..
419 */
420struct ufs_args {
421 char __user *devname;
422 int flags;
423 uid_t exroot;
424};
425
426struct cdfs_args {
427 char __user *devname;
428 int flags;
429 uid_t exroot;
430
431 /* This has lots more here, which Linux handles with the option block
432 but I'm too lazy to do the translation into ASCII. */
433};
434
435struct procfs_args {
436 char __user *devname;
437 int flags;
438 uid_t exroot;
439};
440
441/*
442 * We can't actually handle ufs yet, so we translate UFS mounts to
443 * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS
444 * layout is so braindead it's a major headache doing it.
445 *
446 * Just how long ago was it written? OTOH our UFS driver may be still
447 * unhappy with OSF UFS. [CHECKME]
448 */
449static int
450osf_ufs_mount(const char *dirname, struct ufs_args __user *args, int flags)
451{
452 int retval;
453 struct cdfs_args tmp;
454 struct filename *devname;
455
456 retval = -EFAULT;
457 if (copy_from_user(&tmp, args, sizeof(tmp)))
458 goto out;
459 devname = getname(tmp.devname);
460 retval = PTR_ERR(devname);
461 if (IS_ERR(devname))
462 goto out;
463 retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
464 putname(devname);
465 out:
466 return retval;
467}
468
469static int
470osf_cdfs_mount(const char *dirname, struct cdfs_args __user *args, int flags)
471{
472 int retval;
473 struct cdfs_args tmp;
474 struct filename *devname;
475
476 retval = -EFAULT;
477 if (copy_from_user(&tmp, args, sizeof(tmp)))
478 goto out;
479 devname = getname(tmp.devname);
480 retval = PTR_ERR(devname);
481 if (IS_ERR(devname))
482 goto out;
483 retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
484 putname(devname);
485 out:
486 return retval;
487}
488
489static int
490osf_procfs_mount(const char *dirname, struct procfs_args __user *args, int flags)
491{
492 struct procfs_args tmp;
493
494 if (copy_from_user(&tmp, args, sizeof(tmp)))
495 return -EFAULT;
496
497 return do_mount("", dirname, "proc", flags, NULL);
498}
499
500SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
501 int, flag, void __user *, data)
502{
503 int retval;
504 struct filename *name;
505
506 name = getname(path);
507 retval = PTR_ERR(name);
508 if (IS_ERR(name))
509 goto out;
510 switch (typenr) {
511 case 1:
512 retval = osf_ufs_mount(name->name, data, flag);
513 break;
514 case 6:
515 retval = osf_cdfs_mount(name->name, data, flag);
516 break;
517 case 9:
518 retval = osf_procfs_mount(name->name, data, flag);
519 break;
520 default:
521 retval = -EINVAL;
522 printk("osf_mount(%ld, %x)\n", typenr, flag);
523 }
524 putname(name);
525 out:
526 return retval;
527}
528
529SYSCALL_DEFINE1(osf_utsname, char __user *, name)
530{
531 int error;
532
533 down_read(&uts_sem);
534 error = -EFAULT;
535 if (copy_to_user(name + 0, utsname()->sysname, 32))
536 goto out;
537 if (copy_to_user(name + 32, utsname()->nodename, 32))
538 goto out;
539 if (copy_to_user(name + 64, utsname()->release, 32))
540 goto out;
541 if (copy_to_user(name + 96, utsname()->version, 32))
542 goto out;
543 if (copy_to_user(name + 128, utsname()->machine, 32))
544 goto out;
545
546 error = 0;
547 out:
548 up_read(&uts_sem);
549 return error;
550}
551
552SYSCALL_DEFINE0(getpagesize)
553{
554 return PAGE_SIZE;
555}
556
557SYSCALL_DEFINE0(getdtablesize)
558{
559 return sysctl_nr_open;
560}
561
562/*
563 * For compatibility with OSF/1 only. Use utsname(2) instead.
564 */
565SYSCALL_DEFINE2(osf_getdomainname, char __user *, name, int, namelen)
566{
567 unsigned len;
568 int i;
569
570 if (!access_ok(VERIFY_WRITE, name, namelen))
571 return -EFAULT;
572
573 len = namelen;
574 if (len > 32)
575 len = 32;
576
577 down_read(&uts_sem);
578 for (i = 0; i < len; ++i) {
579 __put_user(utsname()->domainname[i], name + i);
580 if (utsname()->domainname[i] == '\0')
581 break;
582 }
583 up_read(&uts_sem);
584
585 return 0;
586}
587
588/*
589 * The following stuff should move into a header file should it ever
590 * be labeled "officially supported." Right now, there is just enough
591 * support to avoid applications (such as tar) printing error
592 * messages. The attributes are not really implemented.
593 */
594
595/*
596 * Values for Property list entry flag
597 */
598#define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry
599 by default */
600#define PLE_FLAG_MASK 0x1 /* Valid flag values */
601#define PLE_FLAG_ALL -1 /* All flag value */
602
603struct proplistname_args {
604 unsigned int pl_mask;
605 unsigned int pl_numnames;
606 char **pl_names;
607};
608
609union pl_args {
610 struct setargs {
611 char __user *path;
612 long follow;
613 long nbytes;
614 char __user *buf;
615 } set;
616 struct fsetargs {
617 long fd;
618 long nbytes;
619 char __user *buf;
620 } fset;
621 struct getargs {
622 char __user *path;
623 long follow;
624 struct proplistname_args __user *name_args;
625 long nbytes;
626 char __user *buf;
627 int __user *min_buf_size;
628 } get;
629 struct fgetargs {
630 long fd;
631 struct proplistname_args __user *name_args;
632 long nbytes;
633 char __user *buf;
634 int __user *min_buf_size;
635 } fget;
636 struct delargs {
637 char __user *path;
638 long follow;
639 struct proplistname_args __user *name_args;
640 } del;
641 struct fdelargs {
642 long fd;
643 struct proplistname_args __user *name_args;
644 } fdel;
645};
646
647enum pl_code {
648 PL_SET = 1, PL_FSET = 2,
649 PL_GET = 3, PL_FGET = 4,
650 PL_DEL = 5, PL_FDEL = 6
651};
652
653SYSCALL_DEFINE2(osf_proplist_syscall, enum pl_code, code,
654 union pl_args __user *, args)
655{
656 long error;
657 int __user *min_buf_size_ptr;
658
659 switch (code) {
660 case PL_SET:
661 if (get_user(error, &args->set.nbytes))
662 error = -EFAULT;
663 break;
664 case PL_FSET:
665 if (get_user(error, &args->fset.nbytes))
666 error = -EFAULT;
667 break;
668 case PL_GET:
669 error = get_user(min_buf_size_ptr, &args->get.min_buf_size);
670 if (error)
671 break;
672 error = put_user(0, min_buf_size_ptr);
673 break;
674 case PL_FGET:
675 error = get_user(min_buf_size_ptr, &args->fget.min_buf_size);
676 if (error)
677 break;
678 error = put_user(0, min_buf_size_ptr);
679 break;
680 case PL_DEL:
681 case PL_FDEL:
682 error = 0;
683 break;
684 default:
685 error = -EOPNOTSUPP;
686 break;
687 };
688 return error;
689}
690
691SYSCALL_DEFINE2(osf_sigstack, struct sigstack __user *, uss,
692 struct sigstack __user *, uoss)
693{
694 unsigned long usp = rdusp();
695 unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size;
696 unsigned long oss_os = on_sig_stack(usp);
697 int error;
698
699 if (uss) {
700 void __user *ss_sp;
701
702 error = -EFAULT;
703 if (get_user(ss_sp, &uss->ss_sp))
704 goto out;
705
706 /* If the current stack was set with sigaltstack, don't
707 swap stacks while we are on it. */
708 error = -EPERM;
709 if (current->sas_ss_sp && on_sig_stack(usp))
710 goto out;
711
712 /* Since we don't know the extent of the stack, and we don't
713 track onstack-ness, but rather calculate it, we must
714 presume a size. Ho hum this interface is lossy. */
715 current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
716 current->sas_ss_size = SIGSTKSZ;
717 }
718
719 if (uoss) {
720 error = -EFAULT;
721 if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))
722 || __put_user(oss_sp, &uoss->ss_sp)
723 || __put_user(oss_os, &uoss->ss_onstack))
724 goto out;
725 }
726
727 error = 0;
728 out:
729 return error;
730}
731
732SYSCALL_DEFINE3(osf_sysinfo, int, command, char __user *, buf, long, count)
733{
734 const char *sysinfo_table[] = {
735 utsname()->sysname,
736 utsname()->nodename,
737 utsname()->release,
738 utsname()->version,
739 utsname()->machine,
740 "alpha", /* instruction set architecture */
741 "dummy", /* hardware serial number */
742 "dummy", /* hardware manufacturer */
743 "dummy", /* secure RPC domain */
744 };
745 unsigned long offset;
746 const char *res;
747 long len, err = -EINVAL;
748
749 offset = command-1;
750 if (offset >= ARRAY_SIZE(sysinfo_table)) {
751 /* Digital UNIX has a few unpublished interfaces here */
752 printk("sysinfo(%d)", command);
753 goto out;
754 }
755
756 down_read(&uts_sem);
757 res = sysinfo_table[offset];
758 len = strlen(res)+1;
759 if ((unsigned long)len > (unsigned long)count)
760 len = count;
761 if (copy_to_user(buf, res, len))
762 err = -EFAULT;
763 else
764 err = 0;
765 up_read(&uts_sem);
766 out:
767 return err;
768}
769
770SYSCALL_DEFINE5(osf_getsysinfo, unsigned long, op, void __user *, buffer,
771 unsigned long, nbytes, int __user *, start, void __user *, arg)
772{
773 unsigned long w;
774 struct percpu_struct *cpu;
775
776 switch (op) {
777 case GSI_IEEE_FP_CONTROL:
778 /* Return current software fp control & status bits. */
779 /* Note that DU doesn't verify available space here. */
780
781 w = current_thread_info()->ieee_state & IEEE_SW_MASK;
782 w = swcr_update_status(w, rdfpcr());
783 if (put_user(w, (unsigned long __user *) buffer))
784 return -EFAULT;
785 return 0;
786
787 case GSI_IEEE_STATE_AT_SIGNAL:
788 /*
789 * Not sure anybody will ever use this weird stuff. These
790 * ops can be used (under OSF/1) to set the fpcr that should
791 * be used when a signal handler starts executing.
792 */
793 break;
794
795 case GSI_UACPROC:
796 if (nbytes < sizeof(unsigned int))
797 return -EINVAL;
798 w = current_thread_info()->status & UAC_BITMASK;
799 if (put_user(w, (unsigned int __user *)buffer))
800 return -EFAULT;
801 return 1;
802
803 case GSI_PROC_TYPE:
804 if (nbytes < sizeof(unsigned long))
805 return -EINVAL;
806 cpu = (struct percpu_struct*)
807 ((char*)hwrpb + hwrpb->processor_offset);
808 w = cpu->type;
809 if (put_user(w, (unsigned long __user*)buffer))
810 return -EFAULT;
811 return 1;
812
813 case GSI_GET_HWRPB:
814 if (nbytes > sizeof(*hwrpb))
815 return -EINVAL;
816 if (copy_to_user(buffer, hwrpb, nbytes) != 0)
817 return -EFAULT;
818 return 1;
819
820 default:
821 break;
822 }
823
824 return -EOPNOTSUPP;
825}
826
827SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
828 unsigned long, nbytes, int __user *, start, void __user *, arg)
829{
830 switch (op) {
831 case SSI_IEEE_FP_CONTROL: {
832 unsigned long swcr, fpcr;
833 unsigned int *state;
834
835 /*
836 * Alpha Architecture Handbook 4.7.7.3:
837 * To be fully IEEE compiant, we must track the current IEEE
838 * exception state in software, because spurious bits can be
839 * set in the trap shadow of a software-complete insn.
840 */
841
842 if (get_user(swcr, (unsigned long __user *)buffer))
843 return -EFAULT;
844 state = &current_thread_info()->ieee_state;
845
846 /* Update softare trap enable bits. */
847 *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK);
848
849 /* Update the real fpcr. */
850 fpcr = rdfpcr() & FPCR_DYN_MASK;
851 fpcr |= ieee_swcr_to_fpcr(swcr);
852 wrfpcr(fpcr);
853
854 return 0;
855 }
856
857 case SSI_IEEE_RAISE_EXCEPTION: {
858 unsigned long exc, swcr, fpcr, fex;
859 unsigned int *state;
860
861 if (get_user(exc, (unsigned long __user *)buffer))
862 return -EFAULT;
863 state = &current_thread_info()->ieee_state;
864 exc &= IEEE_STATUS_MASK;
865
866 /* Update softare trap enable bits. */
867 swcr = (*state & IEEE_SW_MASK) | exc;
868 *state |= exc;
869
870 /* Update the real fpcr. */
871 fpcr = rdfpcr();
872 fpcr |= ieee_swcr_to_fpcr(swcr);
873 wrfpcr(fpcr);
874
875 /* If any exceptions set by this call, and are unmasked,
876 send a signal. Old exceptions are not signaled. */
877 fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr;
878 if (fex) {
879 siginfo_t info;
880 int si_code = 0;
881
882 if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND;
883 if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES;
884 if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND;
885 if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF;
886 if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
887 if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
888
889 info.si_signo = SIGFPE;
890 info.si_errno = 0;
891 info.si_code = si_code;
892 info.si_addr = NULL; /* FIXME */
893 send_sig_info(SIGFPE, &info, current);
894 }
895 return 0;
896 }
897
898 case SSI_IEEE_STATE_AT_SIGNAL:
899 case SSI_IEEE_IGNORE_STATE_AT_SIGNAL:
900 /*
901 * Not sure anybody will ever use this weird stuff. These
902 * ops can be used (under OSF/1) to set the fpcr that should
903 * be used when a signal handler starts executing.
904 */
905 break;
906
907 case SSI_NVPAIRS: {
908 unsigned __user *p = buffer;
909 unsigned i;
910
911 for (i = 0, p = buffer; i < nbytes; ++i, p += 2) {
912 unsigned v, w, status;
913
914 if (get_user(v, p) || get_user(w, p + 1))
915 return -EFAULT;
916 switch (v) {
917 case SSIN_UACPROC:
918 w &= UAC_BITMASK;
919 status = current_thread_info()->status;
920 status = (status & ~UAC_BITMASK) | w;
921 current_thread_info()->status = status;
922 break;
923
924 default:
925 return -EOPNOTSUPP;
926 }
927 }
928 return 0;
929 }
930
931 case SSI_LMF:
932 return 0;
933
934 default:
935 break;
936 }
937
938 return -EOPNOTSUPP;
939}
940
941/* Translations due to the fact that OSF's time_t is an int. Which
942 affects all sorts of things, like timeval and itimerval. */
943
944extern struct timezone sys_tz;
945
946struct timeval32
947{
948 int tv_sec, tv_usec;
949};
950
951struct itimerval32
952{
953 struct timeval32 it_interval;
954 struct timeval32 it_value;
955};
956
957static inline long
958get_tv32(struct timeval *o, struct timeval32 __user *i)
959{
960 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
961 (__get_user(o->tv_sec, &i->tv_sec) |
962 __get_user(o->tv_usec, &i->tv_usec)));
963}
964
965static inline long
966put_tv32(struct timeval32 __user *o, struct timeval *i)
967{
968 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
969 (__put_user(i->tv_sec, &o->tv_sec) |
970 __put_user(i->tv_usec, &o->tv_usec)));
971}
972
973static inline long
974get_it32(struct itimerval *o, struct itimerval32 __user *i)
975{
976 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
977 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
978 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
979 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
980 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
981}
982
983static inline long
984put_it32(struct itimerval32 __user *o, struct itimerval *i)
985{
986 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
987 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
988 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
989 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
990 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
991}
992
993static inline void
994jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value)
995{
996 value->tv_usec = (jiffies % HZ) * (1000000L / HZ);
997 value->tv_sec = jiffies / HZ;
998}
999
1000SYSCALL_DEFINE2(osf_gettimeofday, struct timeval32 __user *, tv,
1001 struct timezone __user *, tz)
1002{
1003 if (tv) {
1004 struct timeval ktv;
1005 do_gettimeofday(&ktv);
1006 if (put_tv32(tv, &ktv))
1007 return -EFAULT;
1008 }
1009 if (tz) {
1010 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
1011 return -EFAULT;
1012 }
1013 return 0;
1014}
1015
1016SYSCALL_DEFINE2(osf_settimeofday, struct timeval32 __user *, tv,
1017 struct timezone __user *, tz)
1018{
1019 struct timespec kts;
1020 struct timezone ktz;
1021
1022 if (tv) {
1023 if (get_tv32((struct timeval *)&kts, tv))
1024 return -EFAULT;
1025 }
1026 if (tz) {
1027 if (copy_from_user(&ktz, tz, sizeof(*tz)))
1028 return -EFAULT;
1029 }
1030
1031 kts.tv_nsec *= 1000;
1032
1033 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
1034}
1035
1036SYSCALL_DEFINE2(osf_getitimer, int, which, struct itimerval32 __user *, it)
1037{
1038 struct itimerval kit;
1039 int error;
1040
1041 error = do_getitimer(which, &kit);
1042 if (!error && put_it32(it, &kit))
1043 error = -EFAULT;
1044
1045 return error;
1046}
1047
1048SYSCALL_DEFINE3(osf_setitimer, int, which, struct itimerval32 __user *, in,
1049 struct itimerval32 __user *, out)
1050{
1051 struct itimerval kin, kout;
1052 int error;
1053
1054 if (in) {
1055 if (get_it32(&kin, in))
1056 return -EFAULT;
1057 } else
1058 memset(&kin, 0, sizeof(kin));
1059
1060 error = do_setitimer(which, &kin, out ? &kout : NULL);
1061 if (error || !out)
1062 return error;
1063
1064 if (put_it32(out, &kout))
1065 return -EFAULT;
1066
1067 return 0;
1068
1069}
1070
1071SYSCALL_DEFINE2(osf_utimes, const char __user *, filename,
1072 struct timeval32 __user *, tvs)
1073{
1074 struct timespec tv[2];
1075
1076 if (tvs) {
1077 struct timeval ktvs[2];
1078 if (get_tv32(&ktvs[0], &tvs[0]) ||
1079 get_tv32(&ktvs[1], &tvs[1]))
1080 return -EFAULT;
1081
1082 if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 ||
1083 ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000)
1084 return -EINVAL;
1085
1086 tv[0].tv_sec = ktvs[0].tv_sec;
1087 tv[0].tv_nsec = 1000 * ktvs[0].tv_usec;
1088 tv[1].tv_sec = ktvs[1].tv_sec;
1089 tv[1].tv_nsec = 1000 * ktvs[1].tv_usec;
1090 }
1091
1092 return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0);
1093}
1094
1095SYSCALL_DEFINE5(osf_select, int, n, fd_set __user *, inp, fd_set __user *, outp,
1096 fd_set __user *, exp, struct timeval32 __user *, tvp)
1097{
1098 struct timespec end_time, *to = NULL;
1099 if (tvp) {
1100 time_t sec, usec;
1101
1102 to = &end_time;
1103
1104 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
1105 || __get_user(sec, &tvp->tv_sec)
1106 || __get_user(usec, &tvp->tv_usec)) {
1107 return -EFAULT;
1108 }
1109
1110 if (sec < 0 || usec < 0)
1111 return -EINVAL;
1112
1113 if (poll_select_set_timeout(to, sec, usec * NSEC_PER_USEC))
1114 return -EINVAL;
1115
1116 }
1117
1118 /* OSF does not copy back the remaining time. */
1119 return core_sys_select(n, inp, outp, exp, to);
1120}
1121
1122struct rusage32 {
1123 struct timeval32 ru_utime; /* user time used */
1124 struct timeval32 ru_stime; /* system time used */
1125 long ru_maxrss; /* maximum resident set size */
1126 long ru_ixrss; /* integral shared memory size */
1127 long ru_idrss; /* integral unshared data size */
1128 long ru_isrss; /* integral unshared stack size */
1129 long ru_minflt; /* page reclaims */
1130 long ru_majflt; /* page faults */
1131 long ru_nswap; /* swaps */
1132 long ru_inblock; /* block input operations */
1133 long ru_oublock; /* block output operations */
1134 long ru_msgsnd; /* messages sent */
1135 long ru_msgrcv; /* messages received */
1136 long ru_nsignals; /* signals received */
1137 long ru_nvcsw; /* voluntary context switches */
1138 long ru_nivcsw; /* involuntary " */
1139};
1140
1141SYSCALL_DEFINE2(osf_getrusage, int, who, struct rusage32 __user *, ru)
1142{
1143 struct rusage32 r;
1144 cputime_t utime, stime;
1145
1146 if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN)
1147 return -EINVAL;
1148
1149 memset(&r, 0, sizeof(r));
1150 switch (who) {
1151 case RUSAGE_SELF:
1152 task_cputime(current, &utime, &stime);
1153 jiffies_to_timeval32(utime, &r.ru_utime);
1154 jiffies_to_timeval32(stime, &r.ru_stime);
1155 r.ru_minflt = current->min_flt;
1156 r.ru_majflt = current->maj_flt;
1157 break;
1158 case RUSAGE_CHILDREN:
1159 jiffies_to_timeval32(current->signal->cutime, &r.ru_utime);
1160 jiffies_to_timeval32(current->signal->cstime, &r.ru_stime);
1161 r.ru_minflt = current->signal->cmin_flt;
1162 r.ru_majflt = current->signal->cmaj_flt;
1163 break;
1164 }
1165
1166 return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0;
1167}
1168
1169SYSCALL_DEFINE4(osf_wait4, pid_t, pid, int __user *, ustatus, int, options,
1170 struct rusage32 __user *, ur)
1171{
1172 struct rusage r;
1173 long ret, err;
1174 unsigned int status = 0;
1175 mm_segment_t old_fs;
1176
1177 if (!ur)
1178 return sys_wait4(pid, ustatus, options, NULL);
1179
1180 old_fs = get_fs();
1181
1182 set_fs (KERNEL_DS);
1183 ret = sys_wait4(pid, (unsigned int __user *) &status, options,
1184 (struct rusage __user *) &r);
1185 set_fs (old_fs);
1186
1187 if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur)))
1188 return -EFAULT;
1189
1190 err = 0;
1191 err |= put_user(status, ustatus);
1192 err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec);
1193 err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec);
1194 err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec);
1195 err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec);
1196 err |= __put_user(r.ru_maxrss, &ur->ru_maxrss);
1197 err |= __put_user(r.ru_ixrss, &ur->ru_ixrss);
1198 err |= __put_user(r.ru_idrss, &ur->ru_idrss);
1199 err |= __put_user(r.ru_isrss, &ur->ru_isrss);
1200 err |= __put_user(r.ru_minflt, &ur->ru_minflt);
1201 err |= __put_user(r.ru_majflt, &ur->ru_majflt);
1202 err |= __put_user(r.ru_nswap, &ur->ru_nswap);
1203 err |= __put_user(r.ru_inblock, &ur->ru_inblock);
1204 err |= __put_user(r.ru_oublock, &ur->ru_oublock);
1205 err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd);
1206 err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv);
1207 err |= __put_user(r.ru_nsignals, &ur->ru_nsignals);
1208 err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw);
1209 err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw);
1210
1211 return err ? err : ret;
1212}
1213
1214/*
1215 * I don't know what the parameters are: the first one
1216 * seems to be a timeval pointer, and I suspect the second
1217 * one is the time remaining.. Ho humm.. No documentation.
1218 */
1219SYSCALL_DEFINE2(osf_usleep_thread, struct timeval32 __user *, sleep,
1220 struct timeval32 __user *, remain)
1221{
1222 struct timeval tmp;
1223 unsigned long ticks;
1224
1225 if (get_tv32(&tmp, sleep))
1226 goto fault;
1227
1228 ticks = timeval_to_jiffies(&tmp);
1229
1230 ticks = schedule_timeout_interruptible(ticks);
1231
1232 if (remain) {
1233 jiffies_to_timeval(ticks, &tmp);
1234 if (put_tv32(remain, &tmp))
1235 goto fault;
1236 }
1237
1238 return 0;
1239 fault:
1240 return -EFAULT;
1241}
1242
1243
1244struct timex32 {
1245 unsigned int modes; /* mode selector */
1246 long offset; /* time offset (usec) */
1247 long freq; /* frequency offset (scaled ppm) */
1248 long maxerror; /* maximum error (usec) */
1249 long esterror; /* estimated error (usec) */
1250 int status; /* clock command/status */
1251 long constant; /* pll time constant */
1252 long precision; /* clock precision (usec) (read only) */
1253 long tolerance; /* clock frequency tolerance (ppm)
1254 * (read only)
1255 */
1256 struct timeval32 time; /* (read only) */
1257 long tick; /* (modified) usecs between clock ticks */
1258
1259 long ppsfreq; /* pps frequency (scaled ppm) (ro) */
1260 long jitter; /* pps jitter (us) (ro) */
1261 int shift; /* interval duration (s) (shift) (ro) */
1262 long stabil; /* pps stability (scaled ppm) (ro) */
1263 long jitcnt; /* jitter limit exceeded (ro) */
1264 long calcnt; /* calibration intervals (ro) */
1265 long errcnt; /* calibration errors (ro) */
1266 long stbcnt; /* stability limit exceeded (ro) */
1267
1268 int :32; int :32; int :32; int :32;
1269 int :32; int :32; int :32; int :32;
1270 int :32; int :32; int :32; int :32;
1271};
1272
1273SYSCALL_DEFINE1(old_adjtimex, struct timex32 __user *, txc_p)
1274{
1275 struct timex txc;
1276 int ret;
1277
1278 /* copy relevant bits of struct timex. */
1279 if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) ||
1280 copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) -
1281 offsetof(struct timex32, time)))
1282 return -EFAULT;
1283
1284 ret = do_adjtimex(&txc);
1285 if (ret < 0)
1286 return ret;
1287
1288 /* copy back to timex32 */
1289 if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) ||
1290 (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) -
1291 offsetof(struct timex32, tick))) ||
1292 (put_tv32(&txc_p->time, &txc.time)))
1293 return -EFAULT;
1294
1295 return ret;
1296}
1297
1298/* Get an address range which is currently unmapped. Similar to the
1299 generic version except that we know how to honor ADDR_LIMIT_32BIT. */
1300
1301static unsigned long
1302arch_get_unmapped_area_1(unsigned long addr, unsigned long len,
1303 unsigned long limit)
1304{
1305 struct vm_unmapped_area_info info;
1306
1307 info.flags = 0;
1308 info.length = len;
1309 info.low_limit = addr;
1310 info.high_limit = limit;
1311 info.align_mask = 0;
1312 info.align_offset = 0;
1313 return vm_unmapped_area(&info);
1314}
1315
1316unsigned long
1317arch_get_unmapped_area(struct file *filp, unsigned long addr,
1318 unsigned long len, unsigned long pgoff,
1319 unsigned long flags)
1320{
1321 unsigned long limit;
1322
1323 /* "32 bit" actually means 31 bit, since pointers sign extend. */
1324 if (current->personality & ADDR_LIMIT_32BIT)
1325 limit = 0x80000000;
1326 else
1327 limit = TASK_SIZE;
1328
1329 if (len > limit)
1330 return -ENOMEM;
1331
1332 if (flags & MAP_FIXED)
1333 return addr;
1334
1335 /* First, see if the given suggestion fits.
1336
1337 The OSF/1 loader (/sbin/loader) relies on us returning an
1338 address larger than the requested if one exists, which is
1339 a terribly broken way to program.
1340
1341 That said, I can see the use in being able to suggest not
1342 merely specific addresses, but regions of memory -- perhaps
1343 this feature should be incorporated into all ports? */
1344
1345 if (addr) {
1346 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit);
1347 if (addr != (unsigned long) -ENOMEM)
1348 return addr;
1349 }
1350
1351 /* Next, try allocating at TASK_UNMAPPED_BASE. */
1352 addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE),
1353 len, limit);
1354 if (addr != (unsigned long) -ENOMEM)
1355 return addr;
1356
1357 /* Finally, try allocating in low memory. */
1358 addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit);
1359
1360 return addr;
1361}
1362
1363#ifdef CONFIG_OSF4_COMPAT
1364
1365/* Clear top 32 bits of iov_len in the user's buffer for
1366 compatibility with old versions of OSF/1 where iov_len
1367 was defined as int. */
1368static int
1369osf_fix_iov_len(const struct iovec __user *iov, unsigned long count)
1370{
1371 unsigned long i;
1372
1373 for (i = 0 ; i < count ; i++) {
1374 int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1;
1375
1376 if (put_user(0, iov_len_high))
1377 return -EFAULT;
1378 }
1379 return 0;
1380}
1381
1382SYSCALL_DEFINE3(osf_readv, unsigned long, fd,
1383 const struct iovec __user *, vector, unsigned long, count)
1384{
1385 if (unlikely(personality(current->personality) == PER_OSF4))
1386 if (osf_fix_iov_len(vector, count))
1387 return -EFAULT;
1388 return sys_readv(fd, vector, count);
1389}
1390
1391SYSCALL_DEFINE3(osf_writev, unsigned long, fd,
1392 const struct iovec __user *, vector, unsigned long, count)
1393{
1394 if (unlikely(personality(current->personality) == PER_OSF4))
1395 if (osf_fix_iov_len(vector, count))
1396 return -EFAULT;
1397 return sys_writev(fd, vector, count);
1398}
1399
1400#endif
1401
1402SYSCALL_DEFINE2(osf_getpriority, int, which, int, who)
1403{
1404 int prio = sys_getpriority(which, who);
1405 if (prio >= 0) {
1406 /* Return value is the unbiased priority, i.e. 20 - prio.
1407 This does result in negative return values, so signal
1408 no error */
1409 force_successful_syscall_return();
1410 prio = 20 - prio;
1411 }
1412 return prio;
1413}
1414
1415SYSCALL_DEFINE0(getxuid)
1416{
1417 current_pt_regs()->r20 = sys_geteuid();
1418 return sys_getuid();
1419}
1420
1421SYSCALL_DEFINE0(getxgid)
1422{
1423 current_pt_regs()->r20 = sys_getegid();
1424 return sys_getgid();
1425}
1426
1427SYSCALL_DEFINE0(getxpid)
1428{
1429 current_pt_regs()->r20 = sys_getppid();
1430 return sys_getpid();
1431}
1432
1433SYSCALL_DEFINE0(alpha_pipe)
1434{
1435 int fd[2];
1436 int res = do_pipe_flags(fd, 0);
1437 if (!res) {
1438 /* The return values are in $0 and $20. */
1439 current_pt_regs()->r20 = fd[1];
1440 res = fd[0];
1441 }
1442 return res;
1443}
1444
1445SYSCALL_DEFINE1(sethae, unsigned long, val)
1446{
1447 current_pt_regs()->hae = val;
1448 return 0;
1449}
kernel source for telekom puls (alcatel/mediatek)