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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
159 if (copy_from_user(&a, arg, sizeof(a)))
160 return -EFAULT;
161
162 if (a.offset & ~PAGE_MASK)
163 return -EINVAL;
164
165 return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
166 a.offset>>PAGE_SHIFT);
167}
168
169asmlinkage long sys32_mprotect(unsigned long start, size_t len,
170 unsigned long prot)
171{
172 return sys_mprotect(start, len, prot);
173}
174
175asmlinkage long sys32_rt_sigaction(int sig, struct sigaction32 __user *act,
176 struct sigaction32 __user *oact,
177 unsigned int sigsetsize)
178{
179 struct k_sigaction new_ka, old_ka;
180 int ret;
181 compat_sigset_t set32;
182
183
184 if (sigsetsize != sizeof(compat_sigset_t))
185 return -EINVAL;
186
187 if (act) {
188 compat_uptr_t handler, restorer;
189
190 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
191 __get_user(handler, &act->sa_handler) ||
192 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
193 __get_user(restorer, &act->sa_restorer) ||
194 __copy_from_user(&set32, &act->sa_mask,
195 sizeof(compat_sigset_t)))
196 return -EFAULT;
197 new_ka.sa.sa_handler = compat_ptr(handler);
198 new_ka.sa.sa_restorer = compat_ptr(restorer);
199
200
201
202
203
204 switch (_NSIG_WORDS) {
205 case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6]
206 | (((long)set32.sig[7]) << 32);
207 case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4]
208 | (((long)set32.sig[5]) << 32);
209 case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2]
210 | (((long)set32.sig[3]) << 32);
211 case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0]
212 | (((long)set32.sig[1]) << 32);
213 }
214 }
215
216 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
217
218 if (!ret && oact) {
219
220
221
222
223 switch (_NSIG_WORDS) {
224 case 4:
225 set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32);
226 set32.sig[6] = old_ka.sa.sa_mask.sig[3];
227 case 3:
228 set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32);
229 set32.sig[4] = old_ka.sa.sa_mask.sig[2];
230 case 2:
231 set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32);
232 set32.sig[2] = old_ka.sa.sa_mask.sig[1];
233 case 1:
234 set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32);
235 set32.sig[0] = old_ka.sa.sa_mask.sig[0];
236 }
237 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
238 __put_user(ptr_to_compat(old_ka.sa.sa_handler),
239 &oact->sa_handler) ||
240 __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
241 &oact->sa_restorer) ||
242 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
243 __copy_to_user(&oact->sa_mask, &set32,
244 sizeof(compat_sigset_t)))
245 return -EFAULT;
246 }
247
248 return ret;
249}
250
251asmlinkage long sys32_sigaction(int sig, struct old_sigaction32 __user *act,
252 struct old_sigaction32 __user *oact)
253{
254 struct k_sigaction new_ka, old_ka;
255 int ret;
256
257 if (act) {
258 compat_old_sigset_t mask;
259 compat_uptr_t handler, restorer;
260
261 if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
262 __get_user(handler, &act->sa_handler) ||
263 __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
264 __get_user(restorer, &act->sa_restorer) ||
265 __get_user(mask, &act->sa_mask))
266 return -EFAULT;
267
268 new_ka.sa.sa_handler = compat_ptr(handler);
269 new_ka.sa.sa_restorer = compat_ptr(restorer);
270
271 siginitset(&new_ka.sa.sa_mask, mask);
272 }
273
274 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
275
276 if (!ret && oact) {
277 if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
278 __put_user(ptr_to_compat(old_ka.sa.sa_handler),
279 &oact->sa_handler) ||
280 __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
281 &oact->sa_restorer) ||
282 __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
283 __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
284 return -EFAULT;
285 }
286
287 return ret;
288}
289
290asmlinkage long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
291 compat_sigset_t __user *oset,
292 unsigned int sigsetsize)
293{
294 sigset_t s;
295 compat_sigset_t s32;
296 int ret;
297 mm_segment_t old_fs = get_fs();
298
299 if (set) {
300 if (copy_from_user(&s32, set, sizeof(compat_sigset_t)))
301 return -EFAULT;
302 switch (_NSIG_WORDS) {
303 case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
304 case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
305 case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
306 case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
307 }
308 }
309 set_fs(KERNEL_DS);
310 ret = sys_rt_sigprocmask(how,
311 set ? (sigset_t __user *)&s : NULL,
312 oset ? (sigset_t __user *)&s : NULL,
313 sigsetsize);
314 set_fs(old_fs);
315 if (ret)
316 return ret;
317 if (oset) {
318 switch (_NSIG_WORDS) {
319 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
320 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
321 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
322 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
323 }
324 if (copy_to_user(oset, &s32, sizeof(compat_sigset_t)))
325 return -EFAULT;
326 }
327 return 0;
328}
329
330asmlinkage long sys32_alarm(unsigned int seconds)
331{
332 return alarm_setitimer(seconds);
333}
334
335struct sel_arg_struct {
336 unsigned int n;
337 unsigned int inp;
338 unsigned int outp;
339 unsigned int exp;
340 unsigned int tvp;
341};
342
343asmlinkage long sys32_old_select(struct sel_arg_struct __user *arg)
344{
345 struct sel_arg_struct a;
346
347 if (copy_from_user(&a, arg, sizeof(a)))
348 return -EFAULT;
349 return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
350 compat_ptr(a.exp), compat_ptr(a.tvp));
351}
352
353asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr,
354 int options)
355{
356 return compat_sys_wait4(pid, stat_addr, options, NULL);
357}
358
359
360
361asmlinkage long sys32_sysfs(int option, u32 arg1, u32 arg2)
362{
363 return sys_sysfs(option, arg1, arg2);
364}
365
366asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
367 struct compat_timespec __user *interval)
368{
369 struct timespec t;
370 int ret;
371 mm_segment_t old_fs = get_fs();
372
373 set_fs(KERNEL_DS);
374 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
375 set_fs(old_fs);
376 if (put_compat_timespec(&t, interval))
377 return -EFAULT;
378 return ret;
379}
380
381asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
382 compat_size_t sigsetsize)
383{
384 sigset_t s;
385 compat_sigset_t s32;
386 int ret;
387 mm_segment_t old_fs = get_fs();
388
389 set_fs(KERNEL_DS);
390 ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
391 set_fs(old_fs);
392 if (!ret) {
393 switch (_NSIG_WORDS) {
394 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
395 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
396 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
397 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
398 }
399 if (copy_to_user(set, &s32, sizeof(compat_sigset_t)))
400 return -EFAULT;
401 }
402 return ret;
403}
404
405asmlinkage long sys32_rt_sigqueueinfo(int pid, int sig,
406 compat_siginfo_t __user *uinfo)
407{
408 siginfo_t info;
409 int ret;
410 mm_segment_t old_fs = get_fs();
411
412 if (copy_siginfo_from_user32(&info, uinfo))
413 return -EFAULT;
414 set_fs(KERNEL_DS);
415 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
416 set_fs(old_fs);
417 return ret;
418}
419
420
421asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
422 u32 poslo, u32 poshi)
423{
424 return sys_pread64(fd, ubuf, count,
425 ((loff_t)AA(poshi) << 32) | AA(poslo));
426}
427
428asmlinkage long sys32_pwrite(unsigned int fd, char __user *ubuf, u32 count,
429 u32 poslo, u32 poshi)
430{
431 return sys_pwrite64(fd, ubuf, count,
432 ((loff_t)AA(poshi) << 32) | AA(poslo));
433}
434
435
436asmlinkage long sys32_personality(unsigned long personality)
437{
438 int ret;
439
440 if (personality(current->personality) == PER_LINUX32 &&
441 personality == PER_LINUX)
442 personality = PER_LINUX32;
443 ret = sys_personality(personality);
444 if (ret == PER_LINUX32)
445 ret = PER_LINUX;
446 return ret;
447}
448
449asmlinkage long sys32_sendfile(int out_fd, int in_fd,
450 compat_off_t __user *offset, s32 count)
451{
452 mm_segment_t old_fs = get_fs();
453 int ret;
454 off_t of;
455
456 if (offset && get_user(of, offset))
457 return -EFAULT;
458
459 set_fs(KERNEL_DS);
460 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
461 count);
462 set_fs(old_fs);
463
464 if (offset && put_user(of, offset))
465 return -EFAULT;
466 return ret;
467}
468
469asmlinkage long sys32_olduname(struct oldold_utsname __user *name)
470{
471 char *arch = "x86_64";
472 int err;
473
474 if (!name)
475 return -EFAULT;
476 if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
477 return -EFAULT;
478
479 down_read(&uts_sem);
480
481 err = __copy_to_user(&name->sysname, &utsname()->sysname,
482 __OLD_UTS_LEN);
483 err |= __put_user(0, name->sysname+__OLD_UTS_LEN);
484 err |= __copy_to_user(&name->nodename, &utsname()->nodename,
485 __OLD_UTS_LEN);
486 err |= __put_user(0, name->nodename+__OLD_UTS_LEN);
487 err |= __copy_to_user(&name->release, &utsname()->release,
488 __OLD_UTS_LEN);
489 err |= __put_user(0, name->release+__OLD_UTS_LEN);
490 err |= __copy_to_user(&name->version, &utsname()->version,
491 __OLD_UTS_LEN);
492 err |= __put_user(0, name->version+__OLD_UTS_LEN);
493
494 if (personality(current->personality) == PER_LINUX32)
495 arch = "i686";
496
497 err |= __copy_to_user(&name->machine, arch, strlen(arch) + 1);
498
499 up_read(&uts_sem);
500
501 err = err ? -EFAULT : 0;
502
503 return err;
504}
505
506long sys32_uname(struct old_utsname __user *name)
507{
508 int err;
509
510 if (!name)
511 return -EFAULT;
512 down_read(&uts_sem);
513 err = copy_to_user(name, utsname(), sizeof(*name));
514 up_read(&uts_sem);
515 if (personality(current->personality) == PER_LINUX32)
516 err |= copy_to_user(&name->machine, "i686", 5);
517
518 return err ? -EFAULT : 0;
519}
520
521asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
522 compat_uptr_t __user *envp, struct pt_regs *regs)
523{
524 long error;
525 char *filename;
526
527 filename = getname(name);
528 error = PTR_ERR(filename);
529 if (IS_ERR(filename))
530 return error;
531 error = compat_do_execve(filename, argv, envp, regs);
532 putname(filename);
533 return error;
534}
535
536asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
537 struct pt_regs *regs)
538{
539 void __user *parent_tid = (void __user *)regs->dx;
540 void __user *child_tid = (void __user *)regs->di;
541
542 if (!newsp)
543 newsp = regs->sp;
544 return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
545}
546
547
548
549
550
551long sys32_lseek(unsigned int fd, int offset, unsigned int whence)
552{
553 return sys_lseek(fd, offset, whence);
554}
555
556long sys32_kill(int pid, int sig)
557{
558 return sys_kill(pid, sig);
559}
560
561long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
562 __u32 len_low, __u32 len_high, int advice)
563{
564 return sys_fadvise64_64(fd,
565 (((u64)offset_high)<<32) | offset_low,
566 (((u64)len_high)<<32) | len_low,
567 advice);
568}
569
570long sys32_vm86_warning(void)
571{
572 struct task_struct *me = current;
573 static char lastcomm[sizeof(me->comm)];
574
575 if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
576 compat_printk(KERN_INFO
577 "%s: vm86 mode not supported on 64 bit kernel\n",
578 me->comm);
579 strncpy(lastcomm, me->comm, sizeof(lastcomm));
580 }
581 return -ENOSYS;
582}
583
584long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
585 char __user *buf, size_t len)
586{
587 return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len);
588}
589
590asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi,
591 size_t count)
592{
593 return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
594}
595
596asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
597 unsigned n_low, unsigned n_hi, int flags)
598{
599 return sys_sync_file_range(fd,
600 ((u64)off_hi << 32) | off_low,
601 ((u64)n_hi << 32) | n_low, flags);
602}
603
604asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi,
605 size_t len, int advice)
606{
607 return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
608 len, advice);
609}
610
611asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
612 unsigned offset_hi, unsigned len_lo,
613 unsigned len_hi)
614{
615 return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
616 ((u64)len_hi << 32) | len_lo);
617}
618
