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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/mm.h>
32#include <linux/uio.h>
33#include <linux/poll.h>
34#include <linux/personality.h>
35#include <linux/stat.h>
36#include <linux/rwsem.h>
37#include <linux/compat.h>
38#include <linux/vfs.h>
39#include <linux/ptrace.h>
40#include <linux/highuid.h>
41#include <linux/sysctl.h>
42#include <linux/slab.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(const 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(const 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(const 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, const 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_struct32 {
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_struct32 __user *arg)
156{
157 struct mmap_arg_struct32 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
335asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr,
336 int options)
337{
338 return compat_sys_wait4(pid, stat_addr, options, NULL);
339}
340
341
342
343asmlinkage long sys32_sysfs(int option, u32 arg1, u32 arg2)
344{
345 return sys_sysfs(option, arg1, arg2);
346}
347
348asmlinkage long sys32_sched_rr_get_interval(compat_pid_t pid,
349 struct compat_timespec __user *interval)
350{
351 struct timespec t;
352 int ret;
353 mm_segment_t old_fs = get_fs();
354
355 set_fs(KERNEL_DS);
356 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
357 set_fs(old_fs);
358 if (put_compat_timespec(&t, interval))
359 return -EFAULT;
360 return ret;
361}
362
363asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
364 compat_size_t sigsetsize)
365{
366 sigset_t s;
367 compat_sigset_t s32;
368 int ret;
369 mm_segment_t old_fs = get_fs();
370
371 set_fs(KERNEL_DS);
372 ret = sys_rt_sigpending((sigset_t __user *)&s, sigsetsize);
373 set_fs(old_fs);
374 if (!ret) {
375 switch (_NSIG_WORDS) {
376 case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
377 case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
378 case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
379 case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
380 }
381 if (copy_to_user(set, &s32, sizeof(compat_sigset_t)))
382 return -EFAULT;
383 }
384 return ret;
385}
386
387asmlinkage long sys32_rt_sigqueueinfo(int pid, int sig,
388 compat_siginfo_t __user *uinfo)
389{
390 siginfo_t info;
391 int ret;
392 mm_segment_t old_fs = get_fs();
393
394 if (copy_siginfo_from_user32(&info, uinfo))
395 return -EFAULT;
396 set_fs(KERNEL_DS);
397 ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info);
398 set_fs(old_fs);
399 return ret;
400}
401
402
403asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
404 u32 poslo, u32 poshi)
405{
406 return sys_pread64(fd, ubuf, count,
407 ((loff_t)AA(poshi) << 32) | AA(poslo));
408}
409
410asmlinkage long sys32_pwrite(unsigned int fd, const char __user *ubuf,
411 u32 count, u32 poslo, u32 poshi)
412{
413 return sys_pwrite64(fd, ubuf, count,
414 ((loff_t)AA(poshi) << 32) | AA(poslo));
415}
416
417
418asmlinkage long sys32_personality(unsigned long personality)
419{
420 int ret;
421
422 if (personality(current->personality) == PER_LINUX32 &&
423 personality == PER_LINUX)
424 personality = PER_LINUX32;
425 ret = sys_personality(personality);
426 if (ret == PER_LINUX32)
427 ret = PER_LINUX;
428 return ret;
429}
430
431asmlinkage long sys32_sendfile(int out_fd, int in_fd,
432 compat_off_t __user *offset, s32 count)
433{
434 mm_segment_t old_fs = get_fs();
435 int ret;
436 off_t of;
437
438 if (offset && get_user(of, offset))
439 return -EFAULT;
440
441 set_fs(KERNEL_DS);
442 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL,
443 count);
444 set_fs(old_fs);
445
446 if (offset && put_user(of, offset))
447 return -EFAULT;
448 return ret;
449}
450
451asmlinkage long sys32_execve(const char __user *name, compat_uptr_t __user *argv,
452 compat_uptr_t __user *envp, struct pt_regs *regs)
453{
454 long error;
455 char *filename;
456
457 filename = getname(name);
458 error = PTR_ERR(filename);
459 if (IS_ERR(filename))
460 return error;
461 error = compat_do_execve(filename, argv, envp, regs);
462 putname(filename);
463 return error;
464}
465
466asmlinkage long sys32_clone(unsigned int clone_flags, unsigned int newsp,
467 struct pt_regs *regs)
468{
469 void __user *parent_tid = (void __user *)regs->dx;
470 void __user *child_tid = (void __user *)regs->di;
471
472 if (!newsp)
473 newsp = regs->sp;
474 return do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
475}
476
477
478
479
480
481long sys32_lseek(unsigned int fd, int offset, unsigned int whence)
482{
483 return sys_lseek(fd, offset, whence);
484}
485
486long sys32_kill(int pid, int sig)
487{
488 return sys_kill(pid, sig);
489}
490
491long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
492 __u32 len_low, __u32 len_high, int advice)
493{
494 return sys_fadvise64_64(fd,
495 (((u64)offset_high)<<32) | offset_low,
496 (((u64)len_high)<<32) | len_low,
497 advice);
498}
499
500long sys32_vm86_warning(void)
501{
502 struct task_struct *me = current;
503 static char lastcomm[sizeof(me->comm)];
504
505 if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
506 compat_printk(KERN_INFO
507 "%s: vm86 mode not supported on 64 bit kernel\n",
508 me->comm);
509 strncpy(lastcomm, me->comm, sizeof(lastcomm));
510 }
511 return -ENOSYS;
512}
513
514long sys32_lookup_dcookie(u32 addr_low, u32 addr_high,
515 char __user *buf, size_t len)
516{
517 return sys_lookup_dcookie(((u64)addr_high << 32) | addr_low, buf, len);
518}
519
520asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi,
521 size_t count)
522{
523 return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
524}
525
526asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
527 unsigned n_low, unsigned n_hi, int flags)
528{
529 return sys_sync_file_range(fd,
530 ((u64)off_hi << 32) | off_low,
531 ((u64)n_hi << 32) | n_low, flags);
532}
533
534asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi,
535 size_t len, int advice)
536{
537 return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
538 len, advice);
539}
540
541asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
542 unsigned offset_hi, unsigned len_lo,
543 unsigned len_hi)
544{
545 return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
546 ((u64)len_hi << 32) | len_lo);
547}
548
549asmlinkage long sys32_fanotify_mark(int fanotify_fd, unsigned int flags,
550 u32 mask_lo, u32 mask_hi,
551 int fd, const char __user *pathname)
552{
553 return sys_fanotify_mark(fanotify_fd, flags,
554 ((u64)mask_hi << 32) | mask_lo,
555 fd, pathname);
556}
557
