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23#include <linux/kernel.h>
24#include <linux/sched.h>
25#include <linux/fs.h>
26#include <linux/file.h>
27#include <linux/signal.h>
28#include <linux/syscalls.h>
29#include <linux/times.h>
30#include <linux/utsname.h>
31#include <linux/smp_lock.h>
32#include <linux/mm.h>
33#include <linux/uio.h>
34#include <linux/poll.h>
35#include <linux/personality.h>
36#include <linux/stat.h>
37#include <linux/rwsem.h>
38#include <linux/compat.h>
39#include <linux/vfs.h>
40#include <linux/ptrace.h>
41#include <linux/highuid.h>
42#include <linux/sysctl.h>
43#include <asm/mman.h>
44#include <asm/types.h>
45#include <asm/uaccess.h>
46#include <asm/atomic.h>
47#include <asm/vgtod.h>
48#include <asm/sys_ia32.h>
49
50#define AA(__x) ((unsigned long)(__x))
51
52
53asmlinkage long sys32_truncate64(char __user *filename,
54 unsigned long offset_low,
55 unsigned long offset_high)
56{
57 return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
58}
59
60asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long offset_low,
61 unsigned long offset_high)
62{
63 return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
64}
65
66
67
68
69
70static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
71{
72 typeof(ubuf->st_uid) uid = 0;
73 typeof(ubuf->st_gid) gid = 0;
74 SET_UID(uid, stat->uid);
75 SET_GID(gid, stat->gid);
76 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
77 __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
78 __put_user(stat->ino, &ubuf->__st_ino) ||
79 __put_user(stat->ino, &ubuf->st_ino) ||
80 __put_user(stat->mode, &ubuf->st_mode) ||
81 __put_user(stat->nlink, &ubuf->st_nlink) ||
82 __put_user(uid, &ubuf->st_uid) ||
83 __put_user(gid, &ubuf->st_gid) ||
84 __put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev) ||
85 __put_user(stat->size, &ubuf->st_size) ||
86 __put_user(stat->atime.tv_sec, &ubuf->st_atime) ||
87 __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec) ||
88 __put_user(stat->mtime.tv_sec, &ubuf->st_mtime) ||
89 __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) ||
90 __put_user(stat->ctime.tv_sec, &ubuf->st_ctime) ||
91 __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) ||
92 __put_user(stat->blksize, &ubuf->st_blksize) ||
93 __put_user(stat->blocks, &ubuf->st_blocks))
94 return -EFAULT;
95 return 0;
96}
97
98asmlinkage long sys32_stat64(char __user *filename,
99 struct stat64 __user *statbuf)
100{
101 struct kstat stat;
102 int ret = vfs_stat(filename, &stat);
103
104 if (!ret)
105 ret = cp_stat64(statbuf, &stat);
106 return ret;
107}
108
109asmlinkage long sys32_lstat64(char __user *filename,
110 struct stat64 __user *statbuf)
111{
112 struct kstat stat;
113 int ret = vfs_lstat(filename, &stat);
114 if (!ret)
115 ret = cp_stat64(statbuf, &stat);
116 return ret;
117}
118
119asmlinkage long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
120{
121 struct kstat stat;
122 int ret = vfs_fstat(fd, &stat);
123 if (!ret)
124 ret = cp_stat64(statbuf, &stat);
125 return ret;
126}
127
128asmlinkage long sys32_fstatat(unsigned int dfd, char __user *filename,
129 struct stat64 __user *statbuf, int flag)
130{
131 struct kstat stat;
132 int error;
133
134 error = vfs_fstatat(dfd, filename, &stat, flag);
135 if (error)
136 return error;
137 return cp_stat64(statbuf, &stat);
138}
139
140
141
142
143
144
145
146struct mmap_arg_struct {
147 unsigned int addr;
148 unsigned int len;
149 unsigned int prot;
150 unsigned int flags;
151 unsigned int fd;
152 unsigned int offset;
153};
154
155asmlinkage long sys32_mmap(struct mmap_arg_struct __user *arg)
156{
157 struct mmap_arg_struct a;
158 struct file *file = NULL;
159 unsigned long retval;
160 struct mm_struct *mm ;
161
162 if (copy_from_user(&a, arg, sizeof(a)))
163 return -EFAULT;
164
165 if (a.offset & ~PAGE_MASK)
166 return -EINVAL;
167
168 if (!(a.flags & MAP_ANONYMOUS)) {
169 file = fget(a.fd);
170 if (!file)
171 return -EBADF;
172 }
173
174 mm = current->mm;
175 down_write(&mm->mmap_sem);
176 retval = do_mmap_pgoff(file, a.addr, a.len, a.prot, a.flags,
177 a.offset>>PAGE_SHIFT);
178 if (file)
179 fput(file);
180
181 up_write(&mm->mmap_sem);
182
183 return retval;
184}
185
186asmlinkage long sys32_mprotect(unsigned long start, size_t len,
187 unsigned long prot)
188{
189 return sys_mprotect(start, len, prot);
190}
191
192asmlinkage long sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
193 struct sigaction32 __user *oact,
194 unsigned int sigsetsize)
195{
196 struct k_sigaction new_ka, old_ka;
197 int ret;
198 compat_sigset_t set32;
199
200
201 if (sigsetsize != sizeof(compat_sigset_t))
202 return -EINVAL;
203
204 if (act) {
205 compat_uptr_t handler, restorer;
206
207 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
208 __get_user(handler, &act->sa_handler) ||
209 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
210 __get_user(restorer, &act->sa_restorer) ||
211 __copy_from_user(&set32, &act->sa_mask,
212 sizeof(compat_sigset_t)))
213 return -EFAULT;
214 new_ka.sa.sa_handler = compat_ptr(handler);
215 new_ka.sa.sa_restorer = compat_ptr(restorer);
216
217
218
219
220
221 switch (_NSIG_WORDS) {
222 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
223 | (((long)set32.sig[7]) << 32);
224 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
225 | (((long)set32.sig[5]) << 32);
226 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
227 | (((long)set32.sig[3]) << 32);
228 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
229 | (((long)set32.sig[1]) << 32);
230 }
231 }
232
233 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
234
235 if (!ret && oact) {
236
237
238
239
240 switch (_NSIG_WORDS) {
241 case 4:
242 set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
243 set32.sig[6] = old_ka.sa.sa_mask.sig[3];
244 case 3:
245 set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
246 set32.sig[4] = old_ka.sa.sa_mask.sig[2];
247 case 2:
248 set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
249 set32.sig[2] = old_ka.sa.sa_mask.sig[1];
250 case 1:
251 set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
252 set32.sig[0] = old_ka.sa.sa_mask.sig[0];
253 }
254 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
255 __put_user(ptr_to_compat(old_ka.sa.sa_handler),
256 &oact->sa_handler) ||
257 __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
258 &oact->sa_restorer) ||
259 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
260 __copy_to_user(&oact->sa_mask, &set32,
261 sizeof(compat_sigset_t)))
262 return -EFAULT;
263 }
264
265 return ret;
266}
267
268asmlinkage long sys32_sigaction(int sig, struct old_sigaction32 __user *act,
269 struct old_sigaction32 __user *oact)
270{
271 struct k_sigaction new_ka, old_ka;
272 int ret;
273
274 if (act) {
275 compat_old_sigset_t mask;
276 compat_uptr_t handler, restorer;
277
278 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
279 __get_user(handler, &act->sa_handler) ||
280 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
281 __get_user(restorer, &act->sa_restorer) ||
282 __get_user(mask, &act->sa_mask))
283 return -EFAULT;
284
285 new_ka.sa.sa_handler = compat_ptr(handler);
286 new_ka.sa.sa_restorer = compat_ptr(restorer);
287
288 siginitset(&new_ka.sa.sa_mask, mask);
289 }
290
291 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
292
293 if (!ret && oact) {
294 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
295 __put_user(ptr_to_compat(old_ka.sa.sa_handler),
296 &oact->sa_handler) ||
297 __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
298 &oact->sa_restorer) ||
299 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
300 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
301 return -EFAULT;
302 }
303
304 return ret;
305}
306
307asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
308 compat_sigset_t __user *oset,
309 unsigned int sigsetsize)
310{
311 sigset_t s;
312 compat_sigset_t s32;
313 int ret;
314 mm_segment_t old_fs = get_fs();
315
316 if (set) {
317 if (copy_from_user(&s32, set, sizeof(compat_sigset_t)))
318 return -EFAULT;
319 switch (_NSIG_WORDS) {
320 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
321 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
322 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
323 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
324 }
325 }
326 set_fs(KERNEL_DS);
327 ret = sys_rt_sigprocmask(how,
328 set ? (sigset_t __user *)&s : NULL,
329 oset ? (sigset_t __user *)&s : NULL,
330 sigsetsize);
331 set_fs(old_fs);
332 if (ret)
333 return ret;
334 if (oset) {
335 switch (_NSIG_WORDS) {
336 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
337 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
338 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
339 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
340 }
341 if (copy_to_user(oset, &s32, sizeof(compat_sigset_t)))
342 return -EFAULT;
343 }
344 return 0;
345}
346
347asmlinkage long sys32_alarm(unsigned int seconds)
348{
349 return alarm_setitimer(seconds);
350}
351
352struct sel_arg_struct {
353 unsigned int n;
354 unsigned int inp;
355 unsigned int outp;
356 unsigned int exp;
357 unsigned int tvp;
358};
359
360asmlinkage long sys32_old_select(struct sel_arg_struct __user *arg)
361{
362 struct sel_arg_struct a;
363
364 if (copy_from_user(&a, arg, sizeof(a)))
365 return -EFAULT;
366 return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
367 compat_ptr(a.exp), compat_ptr(a.tvp));
368}
369
370asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr,
371 int options)
372{
373 return compat_sys_wait4(pid, stat_addr, options, NULL);
374}
375
376
377
378asmlinkage long sys32_sysfs(int option, u32 arg1, u32 arg2)
379{
380 return sys_sysfs(option, arg1, arg2);
381}
382
383asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
384 struct compat_timespec __user *interval)
385{
386 struct timespec t;
387 int ret;
388 mm_segment_t old_fs = get_fs();
389
390 set_fs(KERNEL_DS);
391 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
392 set_fs(old_fs);
393 if (put_compat_timespec(&t, interval))
394 return -EFAULT;
395 return ret;
396}
397
398asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
399 compat_size_t sigsetsize)
400{
401 sigset_t s;
402 compat_sigset_t s32;
403 int ret;
404 mm_segment_t old_fs = get_fs();
405
406 set_fs(KERNEL_DS);
407 ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
408 set_fs(old_fs);
409 if (!ret) {
410 switch (_NSIG_WORDS) {
411 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
412 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
413 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
414 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
415 }
416 if (copy_to_user(set, &s32, sizeof(compat_sigset_t)))
417 return -EFAULT;
418 }
419 return ret;
420}
421
422asmlinkage long sys32_rt_sigqueueinfo(int pid, int sig,
423 compat_siginfo_t __user *uinfo)
424{
425 siginfo_t info;
426 int ret;
427 mm_segment_t old_fs = get_fs();
428
429 if (copy_siginfo_from_user32(&info, uinfo))
430 return -EFAULT;
431 set_fs(KERNEL_DS);
432 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
433 set_fs(old_fs);
434 return ret;
435}
436
437#ifdef CONFIG_SYSCTL_SYSCALL
438struct sysctl_ia32 {
439 unsigned int name;
440 int nlen;
441 unsigned int oldval;
442 unsigned int oldlenp;
443 unsigned int newval;
444 unsigned int newlen;
445 unsigned int __unused[4];
446};
447
448
449asmlinkage long sys32_sysctl(struct sysctl_ia32 __user *args32)
450{
451 struct sysctl_ia32 a32;
452 mm_segment_t old_fs = get_fs();
453 void __user *oldvalp, *newvalp;
454 size_t oldlen;
455 int __user *namep;
456 long ret;
457
458 if (copy_from_user(&a32, args32, sizeof(a32)))
459 return -EFAULT;
460
461
462
463
464
465
466
467
468
469 namep = compat_ptr(a32.name);
470 oldvalp = compat_ptr(a32.oldval);
471 newvalp = compat_ptr(a32.newval);
472
473 if ((oldvalp && get_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
474 || !access_ok(VERIFY_WRITE, namep, 0)
475 || !access_ok(VERIFY_WRITE, oldvalp, 0)
476 || !access_ok(VERIFY_WRITE, newvalp, 0))
477 return -EFAULT;
478
479 set_fs(KERNEL_DS);
480 lock_kernel();
481 ret = do_sysctl(namep, a32.nlen, oldvalp, (size_t __user *)&oldlen,
482 newvalp, (size_t) a32.newlen);
483 unlock_kernel();
484 set_fs(old_fs);
485
486 if (oldvalp && put_user(oldlen, (int __user *)compat_ptr(a32.oldlenp)))
487 return -EFAULT;
488
489 return ret;
490}
491#endif
492
493
494asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
495 u32 poslo, u32 poshi)
496{
497 return sys_pread64(fd, ubuf, count,
498 ((loff_t)AA(poshi) << 32) | AA(poslo));
499}
500
501asmlinkage long sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count,
502 u32 poslo, u32 poshi)
503{
504 return sys_pwrite64(fd, ubuf, count,
505 ((loff_t)AA(poshi) << 32) | AA(poslo));
506}
507
508
509asmlinkage long sys32_personality(unsigned long personality)
510{
511 int ret;
512
513 if (personality(current->personality) == PER_LINUX32 &&
514 personality == PER_LINUX)
515 personality = PER_LINUX32;
516 ret = sys_personality(personality);
517 if (ret == PER_LINUX32)
518 ret = PER_LINUX;
519 return ret;
520}
521
522asmlinkage long sys32_sendfile(int out_fd, int in_fd,
523 compat_off_t __user *offset, s32 count)
524{
525 mm_segment_t old_fs = get_fs();
526 int ret;
527 off_t of;
528
529 if (offset && get_user(of, offset))
530 return -EFAULT;
531
532 set_fs(KERNEL_DS);
533 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
534 count);
535 set_fs(old_fs);
536
537 if (offset && put_user(of, offset))
538 return -EFAULT;
539 return ret;
540}
541
542asmlinkage long sys32_mmap2(unsigned long addr, unsigned long len,
543 unsigned long prot, unsigned long flags,
544 unsigned long fd, unsigned long pgoff)
545{
546 struct mm_struct *mm = current->mm;
547 unsigned long error;
548 struct file *file = NULL;
549
550 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
551 if (!(flags & MAP_ANONYMOUS)) {
552 file = fget(fd);
553 if (!file)
554 return -EBADF;
555 }
556
557 down_write(&mm->mmap_sem);
558 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
559 up_write(&mm->mmap_sem);
560
561 if (file)
562 fput(file);
563 return error;
564}
565
566asmlinkage long sys32_olduname(struct oldold_utsname __user *name)
567{
568 char *arch = "x86_64";
569 int err;
570
571 if (!name)
572 return -EFAULT;
573 if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
574 return -EFAULT;
575
576 down_read(&uts_sem);
577
578 err = __copy_to_user(&name->sysname, &utsname()->sysname,
579 __OLD_UTS_LEN);
580 err |= __put_user(0, name->sysname+__OLD_UTS_LEN);
581 err |= __copy_to_user(&name->nodename, &utsname()->nodename,
582 __OLD_UTS_LEN);
583 err |= __put_user(0, name->nodename+__OLD_UTS_LEN);
584 err |= __copy_to_user(&name->release, &utsname()->release,
585 __OLD_UTS_LEN);
586 err |= __put_user(0, name->release+__OLD_UTS_LEN);
587 err |= __copy_to_user(&name->version, &utsname()->version,
588 __OLD_UTS_LEN);
589 err |= __put_user(0, name->version+__OLD_UTS_LEN);
590
591 if (personality(current->personality) == PER_LINUX32)
592 arch = "i686";
593
594 err |= __copy_to_user(&name->machine, arch, strlen(arch) + 1);
595
596 up_read(&uts_sem);
597
598 err = err ? -EFAULT : 0;
599
600 return err;
601}
602
603long sys32_uname(struct old_utsname __user *name)
604{
605 int err;
606
607 if (!name)
608 return -EFAULT;
609 down_read(&uts_sem);
610 err = copy_to_user(name, utsname(), sizeof(*name));
611 up_read(&uts_sem);
612 if (personality(current->personality) == PER_LINUX32)
613 err |= copy_to_user(&name->machine, "i686", 5);
614
615 return err ? -EFAULT : 0;
616}
617
618asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
619 compat_uptr_t __user *envp, struct pt_regs *regs)
620{
621 long error;
622 char *filename;
623
624 filename = getname(name);
625 error = PTR_ERR(filename);
626 if (IS_ERR(filename))
627 return error;
628 error = compat_do_execve(filename, argv, envp, regs);
629 putname(filename);
630 return error;
631}
632
633asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
634 struct pt_regs *regs)
635{
636 void __user *parent_tid = (void __user *)regs->dx;
637 void __user *child_tid = (void __user *)regs->di;
638
639 if (!newsp)
640 newsp = regs->sp;
641 return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
642}
643
644
645
646
647
648long sys32_lseek(unsigned int fd, int offset, unsigned int whence)
649{
650 return sys_lseek(fd, offset, whence);
651}
652
653long sys32_kill(int pid, int sig)
654{
655 return sys_kill(pid, sig);
656}
657
658long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
659 __u32 len_low, __u32 len_high, int advice)
660{
661 return sys_fadvise64_64(fd,
662 (((u64)offset_high)<<32) | offset_low,
663 (((u64)len_high)<<32) | len_low,
664 advice);
665}
666
667long sys32_vm86_warning(void)
668{
669 struct task_struct *me = current;
670 static char lastcomm[sizeof(me->comm)];
671
672 if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
673 compat_printk(KERN_INFO
674 "%s: vm86 mode not supported on 64 bit kernel\n",
675 me->comm);
676 strncpy(lastcomm, me->comm, sizeof(lastcomm));
677 }
678 return -ENOSYS;
679}
680
681long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
682 char __user *buf, size_t len)
683{
684 return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len);
685}
686
687asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi,
688 size_t count)
689{
690 return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
691}
692
693asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
694 unsigned n_low, unsigned n_hi, int flags)
695{
696 return sys_sync_file_range(fd,
697 ((u64)off_hi << 32) | off_low,
698 ((u64)n_hi << 32) | n_low, flags);
699}
700
701asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi,
702 size_t len, int advice)
703{
704 return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
705 len, advice);
706}
707
708asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
709 unsigned offset_hi, unsigned len_lo,
710 unsigned len_hi)
711{
712 return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
713 ((u64)len_hi << 32) | len_lo);
714}
715