Commit | Line | Data |
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1da177e4 LT |
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> | |
1da177e4 LT |
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> | |
4fb3a538 | 39 | #include <linux/rcupdate.h> |
1da177e4 LT |
40 | |
41 | #include <asm/fpu.h> | |
42 | #include <asm/io.h> | |
43 | #include <asm/uaccess.h> | |
44 | #include <asm/system.h> | |
45 | #include <asm/sysinfo.h> | |
46 | #include <asm/hwrpb.h> | |
47 | #include <asm/processor.h> | |
48 | ||
49 | extern int do_pipe(int *); | |
50 | ||
51 | /* | |
52 | * Brk needs to return an error. Still support Linux's brk(0) query idiom, | |
53 | * which OSF programs just shouldn't be doing. We're still not quite | |
54 | * identical to OSF as we don't return 0 on success, but doing otherwise | |
55 | * would require changes to libc. Hopefully this is good enough. | |
56 | */ | |
57 | asmlinkage unsigned long | |
58 | osf_brk(unsigned long brk) | |
59 | { | |
60 | unsigned long retval = sys_brk(brk); | |
61 | if (brk && brk != retval) | |
62 | retval = -ENOMEM; | |
63 | return retval; | |
64 | } | |
65 | ||
66 | /* | |
67 | * This is pure guess-work.. | |
68 | */ | |
69 | asmlinkage int | |
70 | osf_set_program_attributes(unsigned long text_start, unsigned long text_len, | |
71 | unsigned long bss_start, unsigned long bss_len) | |
72 | { | |
73 | struct mm_struct *mm; | |
74 | ||
75 | lock_kernel(); | |
76 | mm = current->mm; | |
77 | mm->end_code = bss_start + bss_len; | |
2444e56b | 78 | mm->start_brk = bss_start + bss_len; |
1da177e4 LT |
79 | mm->brk = bss_start + bss_len; |
80 | #if 0 | |
81 | printk("set_program_attributes(%lx %lx %lx %lx)\n", | |
82 | text_start, text_len, bss_start, bss_len); | |
83 | #endif | |
84 | unlock_kernel(); | |
85 | return 0; | |
86 | } | |
87 | ||
88 | /* | |
89 | * OSF/1 directory handling functions... | |
90 | * | |
91 | * The "getdents()" interface is much more sane: the "basep" stuff is | |
92 | * braindamage (it can't really handle filesystems where the directory | |
93 | * offset differences aren't the same as "d_reclen"). | |
94 | */ | |
95 | #define NAME_OFFSET offsetof (struct osf_dirent, d_name) | |
1da177e4 LT |
96 | |
97 | struct osf_dirent { | |
98 | unsigned int d_ino; | |
99 | unsigned short d_reclen; | |
100 | unsigned short d_namlen; | |
101 | char d_name[1]; | |
102 | }; | |
103 | ||
104 | struct osf_dirent_callback { | |
105 | struct osf_dirent __user *dirent; | |
106 | long __user *basep; | |
107 | unsigned int count; | |
108 | int error; | |
109 | }; | |
110 | ||
111 | static int | |
112 | osf_filldir(void *__buf, const char *name, int namlen, loff_t offset, | |
afefdbb2 | 113 | u64 ino, unsigned int d_type) |
1da177e4 LT |
114 | { |
115 | struct osf_dirent __user *dirent; | |
116 | struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf; | |
180e53a7 | 117 | unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); |
afefdbb2 | 118 | unsigned int d_ino; |
1da177e4 LT |
119 | |
120 | buf->error = -EINVAL; /* only used if we fail */ | |
121 | if (reclen > buf->count) | |
122 | return -EINVAL; | |
afefdbb2 DH |
123 | d_ino = ino; |
124 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) | |
125 | return -EOVERFLOW; | |
1da177e4 LT |
126 | if (buf->basep) { |
127 | if (put_user(offset, buf->basep)) | |
128 | return -EFAULT; | |
129 | buf->basep = NULL; | |
130 | } | |
131 | dirent = buf->dirent; | |
afefdbb2 | 132 | put_user(d_ino, &dirent->d_ino); |
1da177e4 LT |
133 | put_user(namlen, &dirent->d_namlen); |
134 | put_user(reclen, &dirent->d_reclen); | |
135 | if (copy_to_user(dirent->d_name, name, namlen) || | |
136 | put_user(0, dirent->d_name + namlen)) | |
137 | return -EFAULT; | |
138 | dirent = (void __user *)dirent + reclen; | |
139 | buf->dirent = dirent; | |
140 | buf->count -= reclen; | |
141 | return 0; | |
142 | } | |
143 | ||
144 | asmlinkage int | |
145 | osf_getdirentries(unsigned int fd, struct osf_dirent __user *dirent, | |
146 | unsigned int count, long __user *basep) | |
147 | { | |
148 | int error; | |
149 | struct file *file; | |
150 | struct osf_dirent_callback buf; | |
151 | ||
152 | error = -EBADF; | |
153 | file = fget(fd); | |
154 | if (!file) | |
155 | goto out; | |
156 | ||
157 | buf.dirent = dirent; | |
158 | buf.basep = basep; | |
159 | buf.count = count; | |
160 | buf.error = 0; | |
161 | ||
162 | error = vfs_readdir(file, osf_filldir, &buf); | |
163 | if (error < 0) | |
164 | goto out_putf; | |
165 | ||
166 | error = buf.error; | |
167 | if (count != buf.count) | |
168 | error = count - buf.count; | |
169 | ||
170 | out_putf: | |
171 | fput(file); | |
172 | out: | |
173 | return error; | |
174 | } | |
175 | ||
1da177e4 LT |
176 | #undef NAME_OFFSET |
177 | ||
178 | asmlinkage unsigned long | |
179 | osf_mmap(unsigned long addr, unsigned long len, unsigned long prot, | |
180 | unsigned long flags, unsigned long fd, unsigned long off) | |
181 | { | |
182 | struct file *file = NULL; | |
183 | unsigned long ret = -EBADF; | |
184 | ||
185 | #if 0 | |
186 | if (flags & (_MAP_HASSEMAPHORE | _MAP_INHERIT | _MAP_UNALIGNED)) | |
187 | printk("%s: unimplemented OSF mmap flags %04lx\n", | |
188 | current->comm, flags); | |
189 | #endif | |
190 | if (!(flags & MAP_ANONYMOUS)) { | |
191 | file = fget(fd); | |
192 | if (!file) | |
193 | goto out; | |
194 | } | |
195 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
196 | down_write(¤t->mm->mmap_sem); | |
197 | ret = do_mmap(file, addr, len, prot, flags, off); | |
198 | up_write(¤t->mm->mmap_sem); | |
199 | if (file) | |
200 | fput(file); | |
201 | out: | |
202 | return ret; | |
203 | } | |
204 | ||
205 | ||
206 | /* | |
207 | * The OSF/1 statfs structure is much larger, but this should | |
208 | * match the beginning, at least. | |
209 | */ | |
210 | struct osf_statfs { | |
211 | short f_type; | |
212 | short f_flags; | |
213 | int f_fsize; | |
214 | int f_bsize; | |
215 | int f_blocks; | |
216 | int f_bfree; | |
217 | int f_bavail; | |
218 | int f_files; | |
219 | int f_ffree; | |
220 | __kernel_fsid_t f_fsid; | |
221 | }; | |
222 | ||
223 | static int | |
224 | linux_to_osf_statfs(struct kstatfs *linux_stat, struct osf_statfs __user *osf_stat, | |
225 | unsigned long bufsiz) | |
226 | { | |
227 | struct osf_statfs tmp_stat; | |
228 | ||
229 | tmp_stat.f_type = linux_stat->f_type; | |
230 | tmp_stat.f_flags = 0; /* mount flags */ | |
231 | tmp_stat.f_fsize = linux_stat->f_frsize; | |
232 | tmp_stat.f_bsize = linux_stat->f_bsize; | |
233 | tmp_stat.f_blocks = linux_stat->f_blocks; | |
234 | tmp_stat.f_bfree = linux_stat->f_bfree; | |
235 | tmp_stat.f_bavail = linux_stat->f_bavail; | |
236 | tmp_stat.f_files = linux_stat->f_files; | |
237 | tmp_stat.f_ffree = linux_stat->f_ffree; | |
238 | tmp_stat.f_fsid = linux_stat->f_fsid; | |
239 | if (bufsiz > sizeof(tmp_stat)) | |
240 | bufsiz = sizeof(tmp_stat); | |
241 | return copy_to_user(osf_stat, &tmp_stat, bufsiz) ? -EFAULT : 0; | |
242 | } | |
243 | ||
244 | static int | |
245 | do_osf_statfs(struct dentry * dentry, struct osf_statfs __user *buffer, | |
246 | unsigned long bufsiz) | |
247 | { | |
248 | struct kstatfs linux_stat; | |
726c3342 | 249 | int error = vfs_statfs(dentry, &linux_stat); |
1da177e4 LT |
250 | if (!error) |
251 | error = linux_to_osf_statfs(&linux_stat, buffer, bufsiz); | |
252 | return error; | |
253 | } | |
254 | ||
255 | asmlinkage int | |
256 | osf_statfs(char __user *path, struct osf_statfs __user *buffer, unsigned long bufsiz) | |
257 | { | |
258 | struct nameidata nd; | |
259 | int retval; | |
260 | ||
261 | retval = user_path_walk(path, &nd); | |
262 | if (!retval) { | |
4ac91378 | 263 | retval = do_osf_statfs(nd.path.dentry, buffer, bufsiz); |
1d957f9b | 264 | path_put(&nd.path); |
1da177e4 LT |
265 | } |
266 | return retval; | |
267 | } | |
268 | ||
269 | asmlinkage int | |
270 | osf_fstatfs(unsigned long fd, struct osf_statfs __user *buffer, unsigned long bufsiz) | |
271 | { | |
272 | struct file *file; | |
273 | int retval; | |
274 | ||
275 | retval = -EBADF; | |
276 | file = fget(fd); | |
277 | if (file) { | |
8ac0352b | 278 | retval = do_osf_statfs(file->f_path.dentry, buffer, bufsiz); |
1da177e4 LT |
279 | fput(file); |
280 | } | |
281 | return retval; | |
282 | } | |
283 | ||
284 | /* | |
285 | * Uhh.. OSF/1 mount parameters aren't exactly obvious.. | |
286 | * | |
287 | * Although to be frank, neither are the native Linux/i386 ones.. | |
288 | */ | |
289 | struct ufs_args { | |
290 | char __user *devname; | |
291 | int flags; | |
292 | uid_t exroot; | |
293 | }; | |
294 | ||
295 | struct cdfs_args { | |
296 | char __user *devname; | |
297 | int flags; | |
298 | uid_t exroot; | |
299 | ||
300 | /* This has lots more here, which Linux handles with the option block | |
301 | but I'm too lazy to do the translation into ASCII. */ | |
302 | }; | |
303 | ||
304 | struct procfs_args { | |
305 | char __user *devname; | |
306 | int flags; | |
307 | uid_t exroot; | |
308 | }; | |
309 | ||
310 | /* | |
311 | * We can't actually handle ufs yet, so we translate UFS mounts to | |
312 | * ext2fs mounts. I wouldn't mind a UFS filesystem, but the UFS | |
313 | * layout is so braindead it's a major headache doing it. | |
314 | * | |
315 | * Just how long ago was it written? OTOH our UFS driver may be still | |
316 | * unhappy with OSF UFS. [CHECKME] | |
317 | */ | |
318 | static int | |
319 | osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags) | |
320 | { | |
321 | int retval; | |
322 | struct cdfs_args tmp; | |
323 | char *devname; | |
324 | ||
325 | retval = -EFAULT; | |
326 | if (copy_from_user(&tmp, args, sizeof(tmp))) | |
327 | goto out; | |
328 | devname = getname(tmp.devname); | |
329 | retval = PTR_ERR(devname); | |
330 | if (IS_ERR(devname)) | |
331 | goto out; | |
332 | retval = do_mount(devname, dirname, "ext2", flags, NULL); | |
333 | putname(devname); | |
334 | out: | |
335 | return retval; | |
336 | } | |
337 | ||
338 | static int | |
339 | osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags) | |
340 | { | |
341 | int retval; | |
342 | struct cdfs_args tmp; | |
343 | char *devname; | |
344 | ||
345 | retval = -EFAULT; | |
346 | if (copy_from_user(&tmp, args, sizeof(tmp))) | |
347 | goto out; | |
348 | devname = getname(tmp.devname); | |
349 | retval = PTR_ERR(devname); | |
350 | if (IS_ERR(devname)) | |
351 | goto out; | |
352 | retval = do_mount(devname, dirname, "iso9660", flags, NULL); | |
353 | putname(devname); | |
354 | out: | |
355 | return retval; | |
356 | } | |
357 | ||
358 | static int | |
359 | osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags) | |
360 | { | |
361 | struct procfs_args tmp; | |
362 | ||
363 | if (copy_from_user(&tmp, args, sizeof(tmp))) | |
364 | return -EFAULT; | |
365 | ||
366 | return do_mount("", dirname, "proc", flags, NULL); | |
367 | } | |
368 | ||
369 | asmlinkage int | |
370 | osf_mount(unsigned long typenr, char __user *path, int flag, void __user *data) | |
371 | { | |
372 | int retval = -EINVAL; | |
373 | char *name; | |
374 | ||
375 | lock_kernel(); | |
376 | ||
377 | name = getname(path); | |
378 | retval = PTR_ERR(name); | |
379 | if (IS_ERR(name)) | |
380 | goto out; | |
381 | switch (typenr) { | |
382 | case 1: | |
383 | retval = osf_ufs_mount(name, data, flag); | |
384 | break; | |
385 | case 6: | |
386 | retval = osf_cdfs_mount(name, data, flag); | |
387 | break; | |
388 | case 9: | |
389 | retval = osf_procfs_mount(name, data, flag); | |
390 | break; | |
391 | default: | |
392 | printk("osf_mount(%ld, %x)\n", typenr, flag); | |
393 | } | |
394 | putname(name); | |
395 | out: | |
396 | unlock_kernel(); | |
397 | return retval; | |
398 | } | |
399 | ||
400 | asmlinkage int | |
401 | osf_utsname(char __user *name) | |
402 | { | |
403 | int error; | |
404 | ||
405 | down_read(&uts_sem); | |
406 | error = -EFAULT; | |
e9ff3990 | 407 | if (copy_to_user(name + 0, utsname()->sysname, 32)) |
1da177e4 | 408 | goto out; |
e9ff3990 | 409 | if (copy_to_user(name + 32, utsname()->nodename, 32)) |
1da177e4 | 410 | goto out; |
e9ff3990 | 411 | if (copy_to_user(name + 64, utsname()->release, 32)) |
1da177e4 | 412 | goto out; |
e9ff3990 | 413 | if (copy_to_user(name + 96, utsname()->version, 32)) |
1da177e4 | 414 | goto out; |
e9ff3990 | 415 | if (copy_to_user(name + 128, utsname()->machine, 32)) |
1da177e4 LT |
416 | goto out; |
417 | ||
418 | error = 0; | |
419 | out: | |
420 | up_read(&uts_sem); | |
421 | return error; | |
422 | } | |
423 | ||
424 | asmlinkage unsigned long | |
425 | sys_getpagesize(void) | |
426 | { | |
427 | return PAGE_SIZE; | |
428 | } | |
429 | ||
430 | asmlinkage unsigned long | |
431 | sys_getdtablesize(void) | |
432 | { | |
9cfe015a | 433 | return sysctl_nr_open; |
1da177e4 LT |
434 | } |
435 | ||
436 | /* | |
437 | * For compatibility with OSF/1 only. Use utsname(2) instead. | |
438 | */ | |
439 | asmlinkage int | |
440 | osf_getdomainname(char __user *name, int namelen) | |
441 | { | |
442 | unsigned len; | |
443 | int i; | |
444 | ||
445 | if (!access_ok(VERIFY_WRITE, name, namelen)) | |
446 | return -EFAULT; | |
447 | ||
448 | len = namelen; | |
449 | if (namelen > 32) | |
450 | len = 32; | |
451 | ||
452 | down_read(&uts_sem); | |
453 | for (i = 0; i < len; ++i) { | |
e9ff3990 SH |
454 | __put_user(utsname()->domainname[i], name + i); |
455 | if (utsname()->domainname[i] == '\0') | |
1da177e4 LT |
456 | break; |
457 | } | |
458 | up_read(&uts_sem); | |
459 | ||
460 | return 0; | |
461 | } | |
462 | ||
1da177e4 LT |
463 | /* |
464 | * The following stuff should move into a header file should it ever | |
465 | * be labeled "officially supported." Right now, there is just enough | |
466 | * support to avoid applications (such as tar) printing error | |
467 | * messages. The attributes are not really implemented. | |
468 | */ | |
469 | ||
470 | /* | |
471 | * Values for Property list entry flag | |
472 | */ | |
473 | #define PLE_PROPAGATE_ON_COPY 0x1 /* cp(1) will copy entry | |
474 | by default */ | |
475 | #define PLE_FLAG_MASK 0x1 /* Valid flag values */ | |
476 | #define PLE_FLAG_ALL -1 /* All flag value */ | |
477 | ||
478 | struct proplistname_args { | |
479 | unsigned int pl_mask; | |
480 | unsigned int pl_numnames; | |
481 | char **pl_names; | |
482 | }; | |
483 | ||
484 | union pl_args { | |
485 | struct setargs { | |
486 | char __user *path; | |
487 | long follow; | |
488 | long nbytes; | |
489 | char __user *buf; | |
490 | } set; | |
491 | struct fsetargs { | |
492 | long fd; | |
493 | long nbytes; | |
494 | char __user *buf; | |
495 | } fset; | |
496 | struct getargs { | |
497 | char __user *path; | |
498 | long follow; | |
499 | struct proplistname_args __user *name_args; | |
500 | long nbytes; | |
501 | char __user *buf; | |
502 | int __user *min_buf_size; | |
503 | } get; | |
504 | struct fgetargs { | |
505 | long fd; | |
506 | struct proplistname_args __user *name_args; | |
507 | long nbytes; | |
508 | char __user *buf; | |
509 | int __user *min_buf_size; | |
510 | } fget; | |
511 | struct delargs { | |
512 | char __user *path; | |
513 | long follow; | |
514 | struct proplistname_args __user *name_args; | |
515 | } del; | |
516 | struct fdelargs { | |
517 | long fd; | |
518 | struct proplistname_args __user *name_args; | |
519 | } fdel; | |
520 | }; | |
521 | ||
522 | enum pl_code { | |
523 | PL_SET = 1, PL_FSET = 2, | |
524 | PL_GET = 3, PL_FGET = 4, | |
525 | PL_DEL = 5, PL_FDEL = 6 | |
526 | }; | |
527 | ||
528 | asmlinkage long | |
529 | osf_proplist_syscall(enum pl_code code, union pl_args __user *args) | |
530 | { | |
531 | long error; | |
532 | int __user *min_buf_size_ptr; | |
533 | ||
534 | lock_kernel(); | |
535 | switch (code) { | |
536 | case PL_SET: | |
537 | if (get_user(error, &args->set.nbytes)) | |
538 | error = -EFAULT; | |
539 | break; | |
540 | case PL_FSET: | |
541 | if (get_user(error, &args->fset.nbytes)) | |
542 | error = -EFAULT; | |
543 | break; | |
544 | case PL_GET: | |
545 | error = get_user(min_buf_size_ptr, &args->get.min_buf_size); | |
546 | if (error) | |
547 | break; | |
548 | error = put_user(0, min_buf_size_ptr); | |
549 | break; | |
550 | case PL_FGET: | |
551 | error = get_user(min_buf_size_ptr, &args->fget.min_buf_size); | |
552 | if (error) | |
553 | break; | |
554 | error = put_user(0, min_buf_size_ptr); | |
555 | break; | |
556 | case PL_DEL: | |
557 | case PL_FDEL: | |
558 | error = 0; | |
559 | break; | |
560 | default: | |
561 | error = -EOPNOTSUPP; | |
562 | break; | |
563 | }; | |
564 | unlock_kernel(); | |
565 | return error; | |
566 | } | |
567 | ||
568 | asmlinkage int | |
569 | osf_sigstack(struct sigstack __user *uss, struct sigstack __user *uoss) | |
570 | { | |
571 | unsigned long usp = rdusp(); | |
572 | unsigned long oss_sp = current->sas_ss_sp + current->sas_ss_size; | |
573 | unsigned long oss_os = on_sig_stack(usp); | |
574 | int error; | |
575 | ||
576 | if (uss) { | |
577 | void __user *ss_sp; | |
578 | ||
579 | error = -EFAULT; | |
580 | if (get_user(ss_sp, &uss->ss_sp)) | |
581 | goto out; | |
582 | ||
583 | /* If the current stack was set with sigaltstack, don't | |
584 | swap stacks while we are on it. */ | |
585 | error = -EPERM; | |
586 | if (current->sas_ss_sp && on_sig_stack(usp)) | |
587 | goto out; | |
588 | ||
589 | /* Since we don't know the extent of the stack, and we don't | |
590 | track onstack-ness, but rather calculate it, we must | |
591 | presume a size. Ho hum this interface is lossy. */ | |
592 | current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; | |
593 | current->sas_ss_size = SIGSTKSZ; | |
594 | } | |
595 | ||
596 | if (uoss) { | |
597 | error = -EFAULT; | |
598 | if (! access_ok(VERIFY_WRITE, uoss, sizeof(*uoss)) | |
599 | || __put_user(oss_sp, &uoss->ss_sp) | |
600 | || __put_user(oss_os, &uoss->ss_onstack)) | |
601 | goto out; | |
602 | } | |
603 | ||
604 | error = 0; | |
605 | out: | |
606 | return error; | |
607 | } | |
608 | ||
609 | asmlinkage long | |
610 | osf_sysinfo(int command, char __user *buf, long count) | |
611 | { | |
e9ff3990 SH |
612 | char *sysinfo_table[] = { |
613 | utsname()->sysname, | |
614 | utsname()->nodename, | |
615 | utsname()->release, | |
616 | utsname()->version, | |
617 | utsname()->machine, | |
1da177e4 LT |
618 | "alpha", /* instruction set architecture */ |
619 | "dummy", /* hardware serial number */ | |
620 | "dummy", /* hardware manufacturer */ | |
621 | "dummy", /* secure RPC domain */ | |
622 | }; | |
623 | unsigned long offset; | |
624 | char *res; | |
625 | long len, err = -EINVAL; | |
626 | ||
627 | offset = command-1; | |
25c8716c | 628 | if (offset >= ARRAY_SIZE(sysinfo_table)) { |
1da177e4 LT |
629 | /* Digital UNIX has a few unpublished interfaces here */ |
630 | printk("sysinfo(%d)", command); | |
631 | goto out; | |
632 | } | |
25c8716c | 633 | |
1da177e4 LT |
634 | down_read(&uts_sem); |
635 | res = sysinfo_table[offset]; | |
636 | len = strlen(res)+1; | |
637 | if (len > count) | |
638 | len = count; | |
639 | if (copy_to_user(buf, res, len)) | |
640 | err = -EFAULT; | |
641 | else | |
642 | err = 0; | |
643 | up_read(&uts_sem); | |
644 | out: | |
645 | return err; | |
646 | } | |
647 | ||
648 | asmlinkage unsigned long | |
649 | osf_getsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, | |
650 | int __user *start, void __user *arg) | |
651 | { | |
652 | unsigned long w; | |
653 | struct percpu_struct *cpu; | |
654 | ||
655 | switch (op) { | |
656 | case GSI_IEEE_FP_CONTROL: | |
657 | /* Return current software fp control & status bits. */ | |
658 | /* Note that DU doesn't verify available space here. */ | |
659 | ||
660 | w = current_thread_info()->ieee_state & IEEE_SW_MASK; | |
661 | w = swcr_update_status(w, rdfpcr()); | |
662 | if (put_user(w, (unsigned long __user *) buffer)) | |
663 | return -EFAULT; | |
664 | return 0; | |
665 | ||
666 | case GSI_IEEE_STATE_AT_SIGNAL: | |
667 | /* | |
668 | * Not sure anybody will ever use this weird stuff. These | |
669 | * ops can be used (under OSF/1) to set the fpcr that should | |
670 | * be used when a signal handler starts executing. | |
671 | */ | |
672 | break; | |
673 | ||
674 | case GSI_UACPROC: | |
675 | if (nbytes < sizeof(unsigned int)) | |
676 | return -EINVAL; | |
677 | w = (current_thread_info()->flags >> UAC_SHIFT) & UAC_BITMASK; | |
678 | if (put_user(w, (unsigned int __user *)buffer)) | |
679 | return -EFAULT; | |
680 | return 1; | |
681 | ||
682 | case GSI_PROC_TYPE: | |
683 | if (nbytes < sizeof(unsigned long)) | |
684 | return -EINVAL; | |
685 | cpu = (struct percpu_struct*) | |
686 | ((char*)hwrpb + hwrpb->processor_offset); | |
687 | w = cpu->type; | |
688 | if (put_user(w, (unsigned long __user*)buffer)) | |
689 | return -EFAULT; | |
690 | return 1; | |
691 | ||
692 | case GSI_GET_HWRPB: | |
693 | if (nbytes < sizeof(*hwrpb)) | |
694 | return -EINVAL; | |
695 | if (copy_to_user(buffer, hwrpb, nbytes) != 0) | |
696 | return -EFAULT; | |
697 | return 1; | |
698 | ||
699 | default: | |
700 | break; | |
701 | } | |
702 | ||
703 | return -EOPNOTSUPP; | |
704 | } | |
705 | ||
706 | asmlinkage unsigned long | |
707 | osf_setsysinfo(unsigned long op, void __user *buffer, unsigned long nbytes, | |
708 | int __user *start, void __user *arg) | |
709 | { | |
710 | switch (op) { | |
711 | case SSI_IEEE_FP_CONTROL: { | |
712 | unsigned long swcr, fpcr; | |
713 | unsigned int *state; | |
714 | ||
715 | /* | |
716 | * Alpha Architecture Handbook 4.7.7.3: | |
717 | * To be fully IEEE compiant, we must track the current IEEE | |
c3a2ddee | 718 | * exception state in software, because spurious bits can be |
1da177e4 LT |
719 | * set in the trap shadow of a software-complete insn. |
720 | */ | |
721 | ||
722 | if (get_user(swcr, (unsigned long __user *)buffer)) | |
723 | return -EFAULT; | |
724 | state = ¤t_thread_info()->ieee_state; | |
725 | ||
726 | /* Update softare trap enable bits. */ | |
727 | *state = (*state & ~IEEE_SW_MASK) | (swcr & IEEE_SW_MASK); | |
728 | ||
729 | /* Update the real fpcr. */ | |
730 | fpcr = rdfpcr() & FPCR_DYN_MASK; | |
731 | fpcr |= ieee_swcr_to_fpcr(swcr); | |
732 | wrfpcr(fpcr); | |
733 | ||
734 | return 0; | |
735 | } | |
736 | ||
737 | case SSI_IEEE_RAISE_EXCEPTION: { | |
738 | unsigned long exc, swcr, fpcr, fex; | |
739 | unsigned int *state; | |
740 | ||
741 | if (get_user(exc, (unsigned long __user *)buffer)) | |
742 | return -EFAULT; | |
743 | state = ¤t_thread_info()->ieee_state; | |
744 | exc &= IEEE_STATUS_MASK; | |
745 | ||
746 | /* Update softare trap enable bits. */ | |
747 | swcr = (*state & IEEE_SW_MASK) | exc; | |
748 | *state |= exc; | |
749 | ||
750 | /* Update the real fpcr. */ | |
751 | fpcr = rdfpcr(); | |
752 | fpcr |= ieee_swcr_to_fpcr(swcr); | |
753 | wrfpcr(fpcr); | |
754 | ||
755 | /* If any exceptions set by this call, and are unmasked, | |
756 | send a signal. Old exceptions are not signaled. */ | |
757 | fex = (exc >> IEEE_STATUS_TO_EXCSUM_SHIFT) & swcr; | |
758 | if (fex) { | |
759 | siginfo_t info; | |
760 | int si_code = 0; | |
761 | ||
762 | if (fex & IEEE_TRAP_ENABLE_DNO) si_code = FPE_FLTUND; | |
763 | if (fex & IEEE_TRAP_ENABLE_INE) si_code = FPE_FLTRES; | |
764 | if (fex & IEEE_TRAP_ENABLE_UNF) si_code = FPE_FLTUND; | |
765 | if (fex & IEEE_TRAP_ENABLE_OVF) si_code = FPE_FLTOVF; | |
766 | if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV; | |
767 | if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV; | |
768 | ||
769 | info.si_signo = SIGFPE; | |
770 | info.si_errno = 0; | |
771 | info.si_code = si_code; | |
772 | info.si_addr = NULL; /* FIXME */ | |
773 | send_sig_info(SIGFPE, &info, current); | |
774 | } | |
775 | return 0; | |
776 | } | |
777 | ||
778 | case SSI_IEEE_STATE_AT_SIGNAL: | |
779 | case SSI_IEEE_IGNORE_STATE_AT_SIGNAL: | |
780 | /* | |
781 | * Not sure anybody will ever use this weird stuff. These | |
782 | * ops can be used (under OSF/1) to set the fpcr that should | |
783 | * be used when a signal handler starts executing. | |
784 | */ | |
785 | break; | |
786 | ||
787 | case SSI_NVPAIRS: { | |
788 | unsigned long v, w, i; | |
789 | unsigned int old, new; | |
790 | ||
791 | for (i = 0; i < nbytes; ++i) { | |
792 | ||
793 | if (get_user(v, 2*i + (unsigned int __user *)buffer)) | |
794 | return -EFAULT; | |
795 | if (get_user(w, 2*i + 1 + (unsigned int __user *)buffer)) | |
796 | return -EFAULT; | |
797 | switch (v) { | |
798 | case SSIN_UACPROC: | |
799 | again: | |
800 | old = current_thread_info()->flags; | |
801 | new = old & ~(UAC_BITMASK << UAC_SHIFT); | |
802 | new = new | (w & UAC_BITMASK) << UAC_SHIFT; | |
803 | if (cmpxchg(¤t_thread_info()->flags, | |
804 | old, new) != old) | |
805 | goto again; | |
806 | break; | |
807 | ||
808 | default: | |
809 | return -EOPNOTSUPP; | |
810 | } | |
811 | } | |
812 | return 0; | |
813 | } | |
814 | ||
815 | default: | |
816 | break; | |
817 | } | |
818 | ||
819 | return -EOPNOTSUPP; | |
820 | } | |
821 | ||
822 | /* Translations due to the fact that OSF's time_t is an int. Which | |
823 | affects all sorts of things, like timeval and itimerval. */ | |
824 | ||
825 | extern struct timezone sys_tz; | |
1da177e4 LT |
826 | |
827 | struct timeval32 | |
828 | { | |
829 | int tv_sec, tv_usec; | |
830 | }; | |
831 | ||
832 | struct itimerval32 | |
833 | { | |
834 | struct timeval32 it_interval; | |
835 | struct timeval32 it_value; | |
836 | }; | |
837 | ||
838 | static inline long | |
839 | get_tv32(struct timeval *o, struct timeval32 __user *i) | |
840 | { | |
841 | return (!access_ok(VERIFY_READ, i, sizeof(*i)) || | |
842 | (__get_user(o->tv_sec, &i->tv_sec) | | |
843 | __get_user(o->tv_usec, &i->tv_usec))); | |
844 | } | |
845 | ||
846 | static inline long | |
847 | put_tv32(struct timeval32 __user *o, struct timeval *i) | |
848 | { | |
849 | return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || | |
850 | (__put_user(i->tv_sec, &o->tv_sec) | | |
851 | __put_user(i->tv_usec, &o->tv_usec))); | |
852 | } | |
853 | ||
854 | static inline long | |
855 | get_it32(struct itimerval *o, struct itimerval32 __user *i) | |
856 | { | |
857 | return (!access_ok(VERIFY_READ, i, sizeof(*i)) || | |
858 | (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | | |
859 | __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | | |
860 | __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | | |
861 | __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); | |
862 | } | |
863 | ||
864 | static inline long | |
865 | put_it32(struct itimerval32 __user *o, struct itimerval *i) | |
866 | { | |
867 | return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || | |
868 | (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | | |
869 | __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | | |
870 | __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | | |
871 | __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); | |
872 | } | |
873 | ||
874 | static inline void | |
875 | jiffies_to_timeval32(unsigned long jiffies, struct timeval32 *value) | |
876 | { | |
877 | value->tv_usec = (jiffies % HZ) * (1000000L / HZ); | |
878 | value->tv_sec = jiffies / HZ; | |
879 | } | |
880 | ||
881 | asmlinkage int | |
882 | osf_gettimeofday(struct timeval32 __user *tv, struct timezone __user *tz) | |
883 | { | |
884 | if (tv) { | |
885 | struct timeval ktv; | |
886 | do_gettimeofday(&ktv); | |
887 | if (put_tv32(tv, &ktv)) | |
888 | return -EFAULT; | |
889 | } | |
890 | if (tz) { | |
891 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) | |
892 | return -EFAULT; | |
893 | } | |
894 | return 0; | |
895 | } | |
896 | ||
897 | asmlinkage int | |
898 | osf_settimeofday(struct timeval32 __user *tv, struct timezone __user *tz) | |
899 | { | |
900 | struct timespec kts; | |
901 | struct timezone ktz; | |
902 | ||
903 | if (tv) { | |
904 | if (get_tv32((struct timeval *)&kts, tv)) | |
905 | return -EFAULT; | |
906 | } | |
907 | if (tz) { | |
908 | if (copy_from_user(&ktz, tz, sizeof(*tz))) | |
909 | return -EFAULT; | |
910 | } | |
911 | ||
912 | kts.tv_nsec *= 1000; | |
913 | ||
914 | return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); | |
915 | } | |
916 | ||
917 | asmlinkage int | |
918 | osf_getitimer(int which, struct itimerval32 __user *it) | |
919 | { | |
920 | struct itimerval kit; | |
921 | int error; | |
922 | ||
923 | error = do_getitimer(which, &kit); | |
924 | if (!error && put_it32(it, &kit)) | |
925 | error = -EFAULT; | |
926 | ||
927 | return error; | |
928 | } | |
929 | ||
930 | asmlinkage int | |
931 | osf_setitimer(int which, struct itimerval32 __user *in, struct itimerval32 __user *out) | |
932 | { | |
933 | struct itimerval kin, kout; | |
934 | int error; | |
935 | ||
936 | if (in) { | |
937 | if (get_it32(&kin, in)) | |
938 | return -EFAULT; | |
939 | } else | |
940 | memset(&kin, 0, sizeof(kin)); | |
941 | ||
942 | error = do_setitimer(which, &kin, out ? &kout : NULL); | |
943 | if (error || !out) | |
944 | return error; | |
945 | ||
946 | if (put_it32(out, &kout)) | |
947 | return -EFAULT; | |
948 | ||
949 | return 0; | |
950 | ||
951 | } | |
952 | ||
953 | asmlinkage int | |
954 | osf_utimes(char __user *filename, struct timeval32 __user *tvs) | |
955 | { | |
1c710c89 | 956 | struct timespec tv[2]; |
1da177e4 LT |
957 | |
958 | if (tvs) { | |
1c710c89 | 959 | struct timeval ktvs[2]; |
1da177e4 LT |
960 | if (get_tv32(&ktvs[0], &tvs[0]) || |
961 | get_tv32(&ktvs[1], &tvs[1])) | |
962 | return -EFAULT; | |
1c710c89 UD |
963 | |
964 | if (ktvs[0].tv_usec < 0 || ktvs[0].tv_usec >= 1000000 || | |
965 | ktvs[1].tv_usec < 0 || ktvs[1].tv_usec >= 1000000) | |
966 | return -EINVAL; | |
967 | ||
968 | tv[0].tv_sec = ktvs[0].tv_sec; | |
969 | tv[0].tv_nsec = 1000 * ktvs[0].tv_usec; | |
970 | tv[1].tv_sec = ktvs[1].tv_sec; | |
971 | tv[1].tv_nsec = 1000 * ktvs[1].tv_usec; | |
1da177e4 LT |
972 | } |
973 | ||
1c710c89 | 974 | return do_utimes(AT_FDCWD, filename, tvs ? tv : NULL, 0); |
1da177e4 LT |
975 | } |
976 | ||
977 | #define MAX_SELECT_SECONDS \ | |
978 | ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) | |
979 | ||
980 | asmlinkage int | |
981 | osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, | |
982 | struct timeval32 __user *tvp) | |
983 | { | |
984 | fd_set_bits fds; | |
985 | char *bits; | |
986 | size_t size; | |
987 | long timeout; | |
988 | int ret = -EINVAL; | |
badf1662 | 989 | struct fdtable *fdt; |
bbea9f69 | 990 | int max_fds; |
1da177e4 LT |
991 | |
992 | timeout = MAX_SCHEDULE_TIMEOUT; | |
993 | if (tvp) { | |
994 | time_t sec, usec; | |
995 | ||
996 | if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) | |
997 | || __get_user(sec, &tvp->tv_sec) | |
998 | || __get_user(usec, &tvp->tv_usec)) { | |
999 | ret = -EFAULT; | |
1000 | goto out_nofds; | |
1001 | } | |
1002 | ||
1003 | if (sec < 0 || usec < 0) | |
1004 | goto out_nofds; | |
1005 | ||
1006 | if ((unsigned long) sec < MAX_SELECT_SECONDS) { | |
1007 | timeout = (usec + 1000000/HZ - 1) / (1000000/HZ); | |
1008 | timeout += sec * (unsigned long) HZ; | |
1009 | } | |
1010 | } | |
1011 | ||
4fb3a538 | 1012 | rcu_read_lock(); |
badf1662 | 1013 | fdt = files_fdtable(current->files); |
bbea9f69 | 1014 | max_fds = fdt->max_fds; |
4fb3a538 | 1015 | rcu_read_unlock(); |
bbea9f69 | 1016 | if (n < 0 || n > max_fds) |
1da177e4 LT |
1017 | goto out_nofds; |
1018 | ||
1019 | /* | |
1020 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), | |
1021 | * since we used fdset we need to allocate memory in units of | |
1022 | * long-words. | |
1023 | */ | |
1024 | ret = -ENOMEM; | |
1025 | size = FDS_BYTES(n); | |
1026 | bits = kmalloc(6 * size, GFP_KERNEL); | |
1027 | if (!bits) | |
1028 | goto out_nofds; | |
1029 | fds.in = (unsigned long *) bits; | |
1030 | fds.out = (unsigned long *) (bits + size); | |
1031 | fds.ex = (unsigned long *) (bits + 2*size); | |
1032 | fds.res_in = (unsigned long *) (bits + 3*size); | |
1033 | fds.res_out = (unsigned long *) (bits + 4*size); | |
1034 | fds.res_ex = (unsigned long *) (bits + 5*size); | |
1035 | ||
1036 | if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) || | |
1037 | (ret = get_fd_set(n, outp->fds_bits, fds.out)) || | |
1038 | (ret = get_fd_set(n, exp->fds_bits, fds.ex))) | |
1039 | goto out; | |
1040 | zero_fd_set(n, fds.res_in); | |
1041 | zero_fd_set(n, fds.res_out); | |
1042 | zero_fd_set(n, fds.res_ex); | |
1043 | ||
1044 | ret = do_select(n, &fds, &timeout); | |
1045 | ||
1046 | /* OSF does not copy back the remaining time. */ | |
1047 | ||
1048 | if (ret < 0) | |
1049 | goto out; | |
1050 | if (!ret) { | |
1051 | ret = -ERESTARTNOHAND; | |
1052 | if (signal_pending(current)) | |
1053 | goto out; | |
1054 | ret = 0; | |
1055 | } | |
1056 | ||
1057 | if (set_fd_set(n, inp->fds_bits, fds.res_in) || | |
1058 | set_fd_set(n, outp->fds_bits, fds.res_out) || | |
1059 | set_fd_set(n, exp->fds_bits, fds.res_ex)) | |
1060 | ret = -EFAULT; | |
1061 | ||
1062 | out: | |
1063 | kfree(bits); | |
1064 | out_nofds: | |
1065 | return ret; | |
1066 | } | |
1067 | ||
1068 | struct rusage32 { | |
1069 | struct timeval32 ru_utime; /* user time used */ | |
1070 | struct timeval32 ru_stime; /* system time used */ | |
1071 | long ru_maxrss; /* maximum resident set size */ | |
1072 | long ru_ixrss; /* integral shared memory size */ | |
1073 | long ru_idrss; /* integral unshared data size */ | |
1074 | long ru_isrss; /* integral unshared stack size */ | |
1075 | long ru_minflt; /* page reclaims */ | |
1076 | long ru_majflt; /* page faults */ | |
1077 | long ru_nswap; /* swaps */ | |
1078 | long ru_inblock; /* block input operations */ | |
1079 | long ru_oublock; /* block output operations */ | |
1080 | long ru_msgsnd; /* messages sent */ | |
1081 | long ru_msgrcv; /* messages received */ | |
1082 | long ru_nsignals; /* signals received */ | |
1083 | long ru_nvcsw; /* voluntary context switches */ | |
1084 | long ru_nivcsw; /* involuntary " */ | |
1085 | }; | |
1086 | ||
1087 | asmlinkage int | |
1088 | osf_getrusage(int who, struct rusage32 __user *ru) | |
1089 | { | |
1090 | struct rusage32 r; | |
1091 | ||
1092 | if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) | |
1093 | return -EINVAL; | |
1094 | ||
1095 | memset(&r, 0, sizeof(r)); | |
1096 | switch (who) { | |
1097 | case RUSAGE_SELF: | |
1098 | jiffies_to_timeval32(current->utime, &r.ru_utime); | |
1099 | jiffies_to_timeval32(current->stime, &r.ru_stime); | |
1100 | r.ru_minflt = current->min_flt; | |
1101 | r.ru_majflt = current->maj_flt; | |
1102 | break; | |
1103 | case RUSAGE_CHILDREN: | |
1104 | jiffies_to_timeval32(current->signal->cutime, &r.ru_utime); | |
1105 | jiffies_to_timeval32(current->signal->cstime, &r.ru_stime); | |
1106 | r.ru_minflt = current->signal->cmin_flt; | |
1107 | r.ru_majflt = current->signal->cmaj_flt; | |
1108 | break; | |
1109 | } | |
1110 | ||
1111 | return copy_to_user(ru, &r, sizeof(r)) ? -EFAULT : 0; | |
1112 | } | |
1113 | ||
1114 | asmlinkage long | |
1115 | osf_wait4(pid_t pid, int __user *ustatus, int options, | |
1116 | struct rusage32 __user *ur) | |
1117 | { | |
1118 | struct rusage r; | |
1119 | long ret, err; | |
1120 | mm_segment_t old_fs; | |
1121 | ||
1122 | if (!ur) | |
1123 | return sys_wait4(pid, ustatus, options, NULL); | |
1124 | ||
1125 | old_fs = get_fs(); | |
1126 | ||
1127 | set_fs (KERNEL_DS); | |
1128 | ret = sys_wait4(pid, ustatus, options, (struct rusage __user *) &r); | |
1129 | set_fs (old_fs); | |
1130 | ||
1131 | if (!access_ok(VERIFY_WRITE, ur, sizeof(*ur))) | |
1132 | return -EFAULT; | |
1133 | ||
1134 | err = 0; | |
1135 | err |= __put_user(r.ru_utime.tv_sec, &ur->ru_utime.tv_sec); | |
1136 | err |= __put_user(r.ru_utime.tv_usec, &ur->ru_utime.tv_usec); | |
1137 | err |= __put_user(r.ru_stime.tv_sec, &ur->ru_stime.tv_sec); | |
1138 | err |= __put_user(r.ru_stime.tv_usec, &ur->ru_stime.tv_usec); | |
1139 | err |= __put_user(r.ru_maxrss, &ur->ru_maxrss); | |
1140 | err |= __put_user(r.ru_ixrss, &ur->ru_ixrss); | |
1141 | err |= __put_user(r.ru_idrss, &ur->ru_idrss); | |
1142 | err |= __put_user(r.ru_isrss, &ur->ru_isrss); | |
1143 | err |= __put_user(r.ru_minflt, &ur->ru_minflt); | |
1144 | err |= __put_user(r.ru_majflt, &ur->ru_majflt); | |
1145 | err |= __put_user(r.ru_nswap, &ur->ru_nswap); | |
1146 | err |= __put_user(r.ru_inblock, &ur->ru_inblock); | |
1147 | err |= __put_user(r.ru_oublock, &ur->ru_oublock); | |
1148 | err |= __put_user(r.ru_msgsnd, &ur->ru_msgsnd); | |
1149 | err |= __put_user(r.ru_msgrcv, &ur->ru_msgrcv); | |
1150 | err |= __put_user(r.ru_nsignals, &ur->ru_nsignals); | |
1151 | err |= __put_user(r.ru_nvcsw, &ur->ru_nvcsw); | |
1152 | err |= __put_user(r.ru_nivcsw, &ur->ru_nivcsw); | |
1153 | ||
1154 | return err ? err : ret; | |
1155 | } | |
1156 | ||
1157 | /* | |
1158 | * I don't know what the parameters are: the first one | |
1159 | * seems to be a timeval pointer, and I suspect the second | |
1160 | * one is the time remaining.. Ho humm.. No documentation. | |
1161 | */ | |
1162 | asmlinkage int | |
1163 | osf_usleep_thread(struct timeval32 __user *sleep, struct timeval32 __user *remain) | |
1164 | { | |
1165 | struct timeval tmp; | |
1166 | unsigned long ticks; | |
1167 | ||
1168 | if (get_tv32(&tmp, sleep)) | |
1169 | goto fault; | |
1170 | ||
24d568ed | 1171 | ticks = timeval_to_jiffies(&tmp); |
1da177e4 | 1172 | |
20c6abd1 | 1173 | ticks = schedule_timeout_interruptible(ticks); |
1da177e4 LT |
1174 | |
1175 | if (remain) { | |
24d568ed | 1176 | jiffies_to_timeval(ticks, &tmp); |
1da177e4 LT |
1177 | if (put_tv32(remain, &tmp)) |
1178 | goto fault; | |
1179 | } | |
1180 | ||
1181 | return 0; | |
1182 | fault: | |
1183 | return -EFAULT; | |
1184 | } | |
1185 | ||
1186 | ||
1187 | struct timex32 { | |
1188 | unsigned int modes; /* mode selector */ | |
1189 | long offset; /* time offset (usec) */ | |
1190 | long freq; /* frequency offset (scaled ppm) */ | |
1191 | long maxerror; /* maximum error (usec) */ | |
1192 | long esterror; /* estimated error (usec) */ | |
1193 | int status; /* clock command/status */ | |
1194 | long constant; /* pll time constant */ | |
1195 | long precision; /* clock precision (usec) (read only) */ | |
1196 | long tolerance; /* clock frequency tolerance (ppm) | |
1197 | * (read only) | |
1198 | */ | |
1199 | struct timeval32 time; /* (read only) */ | |
1200 | long tick; /* (modified) usecs between clock ticks */ | |
1201 | ||
1202 | long ppsfreq; /* pps frequency (scaled ppm) (ro) */ | |
1203 | long jitter; /* pps jitter (us) (ro) */ | |
1204 | int shift; /* interval duration (s) (shift) (ro) */ | |
1205 | long stabil; /* pps stability (scaled ppm) (ro) */ | |
1206 | long jitcnt; /* jitter limit exceeded (ro) */ | |
1207 | long calcnt; /* calibration intervals (ro) */ | |
1208 | long errcnt; /* calibration errors (ro) */ | |
1209 | long stbcnt; /* stability limit exceeded (ro) */ | |
1210 | ||
1211 | int :32; int :32; int :32; int :32; | |
1212 | int :32; int :32; int :32; int :32; | |
1213 | int :32; int :32; int :32; int :32; | |
1214 | }; | |
1215 | ||
1216 | asmlinkage int | |
1217 | sys_old_adjtimex(struct timex32 __user *txc_p) | |
1218 | { | |
1219 | struct timex txc; | |
1220 | int ret; | |
1221 | ||
1222 | /* copy relevant bits of struct timex. */ | |
1223 | if (copy_from_user(&txc, txc_p, offsetof(struct timex32, time)) || | |
1224 | copy_from_user(&txc.tick, &txc_p->tick, sizeof(struct timex32) - | |
1225 | offsetof(struct timex32, time))) | |
1226 | return -EFAULT; | |
1227 | ||
1228 | ret = do_adjtimex(&txc); | |
1229 | if (ret < 0) | |
1230 | return ret; | |
1231 | ||
1232 | /* copy back to timex32 */ | |
1233 | if (copy_to_user(txc_p, &txc, offsetof(struct timex32, time)) || | |
1234 | (copy_to_user(&txc_p->tick, &txc.tick, sizeof(struct timex32) - | |
1235 | offsetof(struct timex32, tick))) || | |
1236 | (put_tv32(&txc_p->time, &txc.time))) | |
1237 | return -EFAULT; | |
1238 | ||
1239 | return ret; | |
1240 | } | |
1241 | ||
1242 | /* Get an address range which is currently unmapped. Similar to the | |
1243 | generic version except that we know how to honor ADDR_LIMIT_32BIT. */ | |
1244 | ||
1245 | static unsigned long | |
1246 | arch_get_unmapped_area_1(unsigned long addr, unsigned long len, | |
1247 | unsigned long limit) | |
1248 | { | |
1249 | struct vm_area_struct *vma = find_vma(current->mm, addr); | |
1250 | ||
1251 | while (1) { | |
1252 | /* At this point: (!vma || addr < vma->vm_end). */ | |
1253 | if (limit - len < addr) | |
1254 | return -ENOMEM; | |
1255 | if (!vma || addr + len <= vma->vm_start) | |
1256 | return addr; | |
1257 | addr = vma->vm_end; | |
1258 | vma = vma->vm_next; | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | unsigned long | |
1263 | arch_get_unmapped_area(struct file *filp, unsigned long addr, | |
1264 | unsigned long len, unsigned long pgoff, | |
1265 | unsigned long flags) | |
1266 | { | |
1267 | unsigned long limit; | |
1268 | ||
1269 | /* "32 bit" actually means 31 bit, since pointers sign extend. */ | |
1270 | if (current->personality & ADDR_LIMIT_32BIT) | |
1271 | limit = 0x80000000; | |
1272 | else | |
1273 | limit = TASK_SIZE; | |
1274 | ||
1275 | if (len > limit) | |
1276 | return -ENOMEM; | |
1277 | ||
4b87b3b2 BH |
1278 | if (flags & MAP_FIXED) |
1279 | return addr; | |
1280 | ||
1da177e4 LT |
1281 | /* First, see if the given suggestion fits. |
1282 | ||
1283 | The OSF/1 loader (/sbin/loader) relies on us returning an | |
1284 | address larger than the requested if one exists, which is | |
1285 | a terribly broken way to program. | |
1286 | ||
1287 | That said, I can see the use in being able to suggest not | |
1288 | merely specific addresses, but regions of memory -- perhaps | |
1289 | this feature should be incorporated into all ports? */ | |
1290 | ||
1291 | if (addr) { | |
1292 | addr = arch_get_unmapped_area_1 (PAGE_ALIGN(addr), len, limit); | |
1293 | if (addr != (unsigned long) -ENOMEM) | |
1294 | return addr; | |
1295 | } | |
1296 | ||
1297 | /* Next, try allocating at TASK_UNMAPPED_BASE. */ | |
1298 | addr = arch_get_unmapped_area_1 (PAGE_ALIGN(TASK_UNMAPPED_BASE), | |
1299 | len, limit); | |
1300 | if (addr != (unsigned long) -ENOMEM) | |
1301 | return addr; | |
1302 | ||
1303 | /* Finally, try allocating in low memory. */ | |
1304 | addr = arch_get_unmapped_area_1 (PAGE_SIZE, len, limit); | |
1305 | ||
1306 | return addr; | |
1307 | } | |
1308 | ||
1309 | #ifdef CONFIG_OSF4_COMPAT | |
1310 | ||
1311 | /* Clear top 32 bits of iov_len in the user's buffer for | |
1312 | compatibility with old versions of OSF/1 where iov_len | |
1313 | was defined as int. */ | |
1314 | static int | |
1315 | osf_fix_iov_len(const struct iovec __user *iov, unsigned long count) | |
1316 | { | |
1317 | unsigned long i; | |
1318 | ||
1319 | for (i = 0 ; i < count ; i++) { | |
1320 | int __user *iov_len_high = (int __user *)&iov[i].iov_len + 1; | |
1321 | ||
1322 | if (put_user(0, iov_len_high)) | |
1323 | return -EFAULT; | |
1324 | } | |
1325 | return 0; | |
1326 | } | |
1327 | ||
1328 | asmlinkage ssize_t | |
1329 | osf_readv(unsigned long fd, const struct iovec __user * vector, unsigned long count) | |
1330 | { | |
1331 | if (unlikely(personality(current->personality) == PER_OSF4)) | |
1332 | if (osf_fix_iov_len(vector, count)) | |
1333 | return -EFAULT; | |
1334 | return sys_readv(fd, vector, count); | |
1335 | } | |
1336 | ||
1337 | asmlinkage ssize_t | |
1338 | osf_writev(unsigned long fd, const struct iovec __user * vector, unsigned long count) | |
1339 | { | |
1340 | if (unlikely(personality(current->personality) == PER_OSF4)) | |
1341 | if (osf_fix_iov_len(vector, count)) | |
1342 | return -EFAULT; | |
1343 | return sys_writev(fd, vector, count); | |
1344 | } | |
1345 | ||
1346 | #endif |