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