1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include <sys/types.h>  // Include something that will define __GLIBC__.
6
7// The entire file is wrapped in this #if. We do this so this .cc file can be
8// compiled, even on a non-glibc build.
9#if defined(__native_client__) && defined(__GLIBC__)
10
11#include "nacl_io/kernel_wrap.h"
12
13#include <alloca.h>
14#include <assert.h>
15#include <dirent.h>
16#include <errno.h>
17#include <irt.h>
18#include <irt_syscalls.h>
19#include <nacl_stat.h>
20#include <string.h>
21#include <sys/stat.h>
22#include <sys/time.h>
23
24#include "nacl_io/kernel_intercept.h"
25#include "nacl_io/kernel_wrap_real.h"
26#include "nacl_io/log.h"
27#include "nacl_io/osmman.h"
28#include "nacl_io/ostime.h"
29
30namespace {
31
32void stat_to_nacl_stat(const struct stat* buf, nacl_abi_stat* nacl_buf) {
33  memset(nacl_buf, 0, sizeof(struct nacl_abi_stat));
34  nacl_buf->nacl_abi_st_dev = buf->st_dev;
35  nacl_buf->nacl_abi_st_ino = buf->st_ino;
36  nacl_buf->nacl_abi_st_mode = buf->st_mode;
37  nacl_buf->nacl_abi_st_nlink = buf->st_nlink;
38  nacl_buf->nacl_abi_st_uid = buf->st_uid;
39  nacl_buf->nacl_abi_st_gid = buf->st_gid;
40  nacl_buf->nacl_abi_st_rdev = buf->st_rdev;
41  nacl_buf->nacl_abi_st_size = buf->st_size;
42  nacl_buf->nacl_abi_st_blksize = buf->st_blksize;
43  nacl_buf->nacl_abi_st_blocks = buf->st_blocks;
44  nacl_buf->nacl_abi_st_atime = buf->st_atime;
45  nacl_buf->nacl_abi_st_atimensec = buf->st_atimensec;
46  nacl_buf->nacl_abi_st_mtime = buf->st_mtime;
47  nacl_buf->nacl_abi_st_mtimensec = buf->st_mtimensec;
48  nacl_buf->nacl_abi_st_ctime = buf->st_ctime;
49  nacl_buf->nacl_abi_st_ctimensec = buf->st_ctimensec;
50}
51
52void nacl_stat_to_stat(const nacl_abi_stat* nacl_buf, struct stat* buf) {
53  memset(buf, 0, sizeof(struct stat));
54  buf->st_dev = nacl_buf->nacl_abi_st_dev;
55  buf->st_ino = nacl_buf->nacl_abi_st_ino;
56  buf->st_mode = nacl_buf->nacl_abi_st_mode;
57  buf->st_nlink = nacl_buf->nacl_abi_st_nlink;
58  buf->st_uid = nacl_buf->nacl_abi_st_uid;
59  buf->st_gid = nacl_buf->nacl_abi_st_gid;
60  buf->st_rdev = nacl_buf->nacl_abi_st_rdev;
61  buf->st_size = nacl_buf->nacl_abi_st_size;
62  buf->st_blksize = nacl_buf->nacl_abi_st_blksize;
63  buf->st_blocks = nacl_buf->nacl_abi_st_blocks;
64  buf->st_atime = nacl_buf->nacl_abi_st_atime;
65  buf->st_atimensec = nacl_buf->nacl_abi_st_atimensec;
66  buf->st_mtime = nacl_buf->nacl_abi_st_mtime;
67  buf->st_mtimensec = nacl_buf->nacl_abi_st_mtimensec;
68  buf->st_ctime = nacl_buf->nacl_abi_st_ctime;
69  buf->st_ctimensec = nacl_buf->nacl_abi_st_ctimensec;
70}
71
72}  // namespace
73
74// From native_client/src/trusted/service_runtime/include/sys/dirent.h
75
76#ifndef nacl_abi___ino_t_defined
77#define nacl_abi___ino_t_defined
78typedef int64_t nacl_abi___ino_t;
79typedef nacl_abi___ino_t nacl_abi_ino_t;
80#endif
81
82#ifndef nacl_abi___off_t_defined
83#define nacl_abi___off_t_defined
84typedef int64_t nacl_abi__off_t;
85typedef nacl_abi__off_t nacl_abi_off_t;
86#endif
87
88/* We need a way to define the maximum size of a name. */
89#ifndef MAXNAMLEN
90# ifdef NAME_MAX
91#  define MAXNAMLEN NAME_MAX
92# else
93#  define MAXNAMLEN 255
94# endif
95#endif
96
97struct nacl_abi_dirent {
98  nacl_abi_ino_t nacl_abi_d_ino;
99  nacl_abi_off_t nacl_abi_d_off;
100  uint16_t       nacl_abi_d_reclen;
101  char           nacl_abi_d_name[MAXNAMLEN + 1];
102};
103
104static const int d_name_shift = offsetof (dirent, d_name) -
105  offsetof (struct nacl_abi_dirent, nacl_abi_d_name);
106
107EXTERN_C_BEGIN
108
109// Macro to get the REAL function pointer
110#define REAL(name) __nacl_irt_##name##_real
111
112// Macro to get the WRAP function
113#define WRAP(name) __nacl_irt_##name##_wrap
114
115// Declare REAL function pointer.
116#define DECLARE_REAL_PTR(name) typeof(__nacl_irt_##name) REAL(name);
117
118// Assign the REAL function pointer.
119#define ASSIGN_REAL_PTR(name)        \
120  assert(__nacl_irt_##name != NULL); \
121  REAL(name) = __nacl_irt_##name;
122
123// Switch IRT's pointer to the REAL pointer
124#define USE_REAL(name) __nacl_irt_##name = (typeof(__nacl_irt_##name))REAL(name)
125
126// Switch IRT's pointer to the WRAP function
127#define USE_WRAP(name) __nacl_irt_##name = (typeof(__nacl_irt_##name))WRAP(name)
128
129#define EXPAND_SYMBOL_LIST_OPERATION(OP) \
130  OP(chdir);                             \
131  OP(close);                             \
132  OP(dup);                               \
133  OP(dup2);                              \
134  OP(exit);                              \
135  OP(fstat);                             \
136  OP(getcwd);                            \
137  OP(getdents);                          \
138  OP(mkdir);                             \
139  OP(open);                              \
140  OP(poll);                              \
141  OP(read);                              \
142  OP(rmdir);                             \
143  OP(seek);                              \
144  OP(stat);                              \
145  OP(select);                            \
146  OP(write);                             \
147  OP(mmap);                              \
148  OP(munmap);                            \
149  OP(open_resource);                     \
150                                         \
151  OP(socket);                            \
152  OP(accept);                            \
153  OP(bind);                              \
154  OP(listen);                            \
155  OP(connect);                           \
156  OP(send);                              \
157  OP(sendmsg);                           \
158  OP(sendto);                            \
159  OP(recv);                              \
160  OP(recvmsg);                           \
161  OP(recvfrom);                          \
162  OP(getpeername);                       \
163  OP(getsockname);                       \
164  OP(getsockopt);                        \
165  OP(setsockopt);                        \
166  OP(socketpair);                        \
167  OP(shutdown);                          \
168                                         \
169  OP(chmod);                             \
170  OP(access);                            \
171  OP(unlink);                            \
172  OP(fchdir);                            \
173  OP(fchmod);                            \
174  OP(fsync);                             \
175  OP(fdatasync);                         \
176  OP(lstat);                             \
177  OP(link);                              \
178  OP(readlink);                          \
179  OP(utimes);
180
181// TODO(bradnelson): Add these as well.
182// OP(epoll_create);
183// OP(epoll_create1);
184// OP(epoll_ctl);
185// OP(epoll_pwait);
186// OP(ppoll);
187// OP(pselect);
188
189EXPAND_SYMBOL_LIST_OPERATION(DECLARE_REAL_PTR);
190
191int WRAP(chdir)(const char* pathname) {
192  ERRNO_RTN(ki_chdir(pathname));
193}
194
195int WRAP(close)(int fd) {
196  ERRNO_RTN(ki_close(fd));
197}
198
199int WRAP(dup)(int fd, int* newfd) NOTHROW {
200  *newfd = ki_dup(fd);
201  RTN_ERRNO_IF(*newfd < 0);
202  return 0;
203}
204
205int WRAP(dup2)(int fd, int newfd) NOTHROW {
206  ERRNO_RTN(ki_dup2(fd, newfd));
207}
208
209void WRAP(exit)(int status) {
210  ki_exit(status);
211}
212
213int WRAP(fstat)(int fd, struct nacl_abi_stat* nacl_buf) {
214  struct stat buf;
215  memset(&buf, 0, sizeof(struct stat));
216  int res = ki_fstat(fd, &buf);
217  RTN_ERRNO_IF(res < 0);
218  stat_to_nacl_stat(&buf, nacl_buf);
219  return 0;
220}
221
222int WRAP(getcwd)(char* buf, size_t size) {
223  RTN_ERRNO_IF(ki_getcwd(buf, size) == NULL);
224  return 0;
225}
226
227int WRAP(getdents)(int fd, dirent* nacl_buf, size_t nacl_count, size_t* nread) {
228  int nacl_offset = 0;
229  // "buf" contains dirent(s); "nacl_buf" contains nacl_abi_dirent(s).
230  // nacl_abi_dirent(s) are smaller than dirent(s), so nacl_count bytes buffer
231  // is enough
232  char* buf = (char*)alloca(nacl_count);
233  int offset = 0;
234  int count;
235
236  count = ki_getdents(fd, buf, nacl_count);
237  RTN_ERRNO_IF(count < 0);
238
239  while (offset < count) {
240    dirent* d = (dirent*)(buf + offset);
241    nacl_abi_dirent* nacl_d = (nacl_abi_dirent*)((char*)nacl_buf + nacl_offset);
242    nacl_d->nacl_abi_d_ino = d->d_ino;
243    nacl_d->nacl_abi_d_off = d->d_off;
244    nacl_d->nacl_abi_d_reclen = d->d_reclen - d_name_shift;
245    size_t d_name_len = d->d_reclen - offsetof(dirent, d_name);
246    memcpy(nacl_d->nacl_abi_d_name, d->d_name, d_name_len);
247
248    offset += d->d_reclen;
249    nacl_offset += nacl_d->nacl_abi_d_reclen;
250  }
251
252  *nread = nacl_offset;
253  return 0;
254}
255
256int WRAP(mkdir)(const char* pathname, mode_t mode) {
257  RTN_ERRNO_IF(ki_mkdir(pathname, mode) < 0);
258  return 0;
259}
260
261int WRAP(mmap)(void** addr,
262               size_t length,
263               int prot,
264               int flags,
265               int fd,
266               off_t offset) {
267  if (flags & MAP_ANONYMOUS)
268    return REAL(mmap)(addr, length, prot, flags, fd, offset);
269
270  *addr = ki_mmap(*addr, length, prot, flags, fd, offset);
271  RTN_ERRNO_IF(*addr == (void*)-1);
272  return 0;
273}
274
275int WRAP(munmap)(void* addr, size_t length) {
276  // Always let the real munmap run on the address range. It is not an error if
277  // there are no mapped pages in that range.
278  ki_munmap(addr, length);
279  return REAL(munmap)(addr, length);
280}
281
282int WRAP(open)(const char* pathname, int oflag, mode_t mode, int* newfd) {
283  *newfd = ki_open(pathname, oflag, mode);
284  RTN_ERRNO_IF(*newfd < 0);
285  return 0;
286}
287
288int WRAP(open_resource)(const char* file, int* fd) {
289  *fd = ki_open_resource(file);
290  RTN_ERRNO_IF(*fd < 0);
291  return 0;
292}
293
294int WRAP(poll)(struct pollfd* fds, nfds_t nfds, int timeout, int* count) {
295  *count = ki_poll(fds, nfds, timeout);
296  RTN_ERRNO_IF(*count < 0);
297  return 0;
298}
299
300int WRAP(read)(int fd, void* buf, size_t count, size_t* nread) {
301  ssize_t signed_nread = ki_read(fd, buf, count);
302  *nread = static_cast<size_t>(signed_nread);
303  RTN_ERRNO_IF(signed_nread < 0);
304  return 0;
305}
306
307int WRAP(rmdir)(const char* pathname) {
308  RTN_ERRNO_IF(ki_rmdir(pathname) < 0);
309  return 0;
310}
311
312int WRAP(seek)(int fd, off_t offset, int whence, off_t* new_offset) {
313  *new_offset = ki_lseek(fd, offset, whence);
314  RTN_ERRNO_IF(*new_offset < 0);
315  return 0;
316}
317
318int WRAP(select)(int nfds,
319                 fd_set* readfds,
320                 fd_set* writefds,
321                 fd_set* exceptfds,
322                 struct timeval* timeout,
323                 int* count) {
324  *count = ki_select(nfds, readfds, writefds, exceptfds, timeout);
325  RTN_ERRNO_IF(*count < 0);
326  return 0;
327}
328
329int WRAP(stat)(const char* pathname, struct nacl_abi_stat* nacl_buf) {
330  struct stat buf;
331  memset(&buf, 0, sizeof(struct stat));
332  int res = ki_stat(pathname, &buf);
333  RTN_ERRNO_IF(res < 0);
334  stat_to_nacl_stat(&buf, nacl_buf);
335  return 0;
336}
337
338int WRAP(lstat)(const char* pathname, struct nacl_abi_stat* nacl_buf) {
339  struct stat buf;
340  memset(&buf, 0, sizeof(struct stat));
341  int res = ki_lstat(pathname, &buf);
342  RTN_ERRNO_IF(res < 0);
343  stat_to_nacl_stat(&buf, nacl_buf);
344  return 0;
345}
346
347int WRAP(link)(const char* pathname, const char* newpath) {
348  ERRNO_RTN(ki_link(pathname, newpath));
349}
350
351int WRAP(readlink)(const char* pathname,
352                   char* buf,
353                   size_t count,
354                   size_t* nread) {
355  int rtn = ki_readlink(pathname, buf, count);
356  RTN_ERRNO_IF(rtn < 0);
357  *nread = rtn;
358  return 0;
359}
360
361int WRAP(utimes)(const char *filename, const struct timeval *times) {
362  ERRNO_RTN(ki_utimes(filename, times));
363}
364
365int WRAP(chmod)(const char* pathname, mode_t mode) {
366  ERRNO_RTN(ki_chmod(pathname, mode));
367}
368
369int WRAP(access)(const char* pathname, int amode) {
370  ERRNO_RTN(ki_access(pathname, amode));
371}
372
373int WRAP(unlink)(const char* pathname) {
374  ERRNO_RTN(ki_unlink(pathname));
375}
376
377int WRAP(fchdir)(int fd) {
378  ERRNO_RTN(ki_fchdir(fd));
379}
380
381int WRAP(fchmod)(int fd, mode_t mode) {
382  ERRNO_RTN(ki_fchmod(fd, mode));
383}
384
385int WRAP(fsync)(int fd) {
386  ERRNO_RTN(ki_fsync(fd));
387}
388
389int WRAP(fdatasync)(int fd) {
390  ERRNO_RTN(ki_fdatasync(fd));
391}
392
393int WRAP(write)(int fd, const void* buf, size_t count, size_t* nwrote) {
394  ssize_t signed_nwrote = ki_write(fd, buf, count);
395  *nwrote = static_cast<size_t>(signed_nwrote);
396  RTN_ERRNO_IF(signed_nwrote < 0);
397  return 0;
398}
399
400int WRAP(accept)(int sockfd,
401                 struct sockaddr* addr,
402                 socklen_t* addrlen,
403                 int* sd) {
404  *sd = ki_accept(sockfd, addr, addrlen);
405  RTN_ERRNO_IF(*sd < 0);
406  return 0;
407}
408
409int WRAP(bind)(int sockfd, const struct sockaddr* addr, socklen_t addrlen) {
410  ERRNO_RTN(ki_bind(sockfd, addr, addrlen));
411}
412
413int WRAP(connect)(int sockfd, const struct sockaddr* addr, socklen_t addrlen) {
414  ERRNO_RTN(ki_connect(sockfd, addr, addrlen));
415}
416
417int WRAP(getpeername)(int sockfd, struct sockaddr* addr, socklen_t* addrlen) {
418  ERRNO_RTN(ki_getpeername(sockfd, addr, addrlen));
419}
420
421int WRAP(getsockname)(int sockfd, struct sockaddr* addr, socklen_t* addrlen) {
422  ERRNO_RTN(ki_getsockname(sockfd, addr, addrlen));
423}
424
425int WRAP(getsockopt)(int sockfd,
426                     int level,
427                     int optname,
428                     void* optval,
429                     socklen_t* optlen) {
430  ERRNO_RTN(ki_getsockopt(sockfd, level, optname, optval, optlen));
431}
432
433int WRAP(setsockopt)(int sockfd,
434                     int level,
435                     int optname,
436                     const void* optval,
437                     socklen_t optlen) {
438  ERRNO_RTN(ki_setsockopt(sockfd, level, optname, optval, optlen));
439}
440
441int WRAP(listen)(int sockfd, int backlog) {
442  ERRNO_RTN(ki_listen(sockfd, backlog));
443}
444
445int WRAP(recv)(int sockfd, void* buf, size_t len, int flags, int* count) {
446  ssize_t signed_nread = ki_recv(sockfd, buf, len, flags);
447  *count = static_cast<int>(signed_nread);
448  RTN_ERRNO_IF(signed_nread < 0);
449  return 0;
450}
451
452int WRAP(recvfrom)(int sockfd,
453                   void* buf,
454                   size_t len,
455                   int flags,
456                   struct sockaddr* addr,
457                   socklen_t* addrlen,
458                   int* count) {
459  ssize_t signed_nread = ki_recvfrom(sockfd, buf, len, flags, addr, addrlen);
460  *count = static_cast<int>(signed_nread);
461  RTN_ERRNO_IF(signed_nread < 0);
462  return 0;
463}
464
465int WRAP(recvmsg)(int sockfd, struct msghdr* msg, int flags, int* count) {
466  ssize_t signed_nread = ki_recvmsg(sockfd, msg, flags);
467  *count = static_cast<int>(signed_nread);
468  RTN_ERRNO_IF(signed_nread < 0);
469  return 0;
470}
471
472ssize_t WRAP(send)(int sockfd, const void* buf, size_t len, int flags,
473                   int* count) {
474  ssize_t signed_nread = ki_send(sockfd, buf, len, flags);
475  *count = static_cast<int>(signed_nread);
476  RTN_ERRNO_IF(signed_nread < 0);
477  return 0;
478}
479
480ssize_t WRAP(sendto)(int sockfd,
481                     const void* buf,
482                     size_t len,
483                     int flags,
484                     const struct sockaddr* addr,
485                     socklen_t addrlen,
486                     int* count) {
487  ssize_t signed_nread = ki_sendto(sockfd, buf, len, flags, addr, addrlen);
488  *count = static_cast<int>(signed_nread);
489  RTN_ERRNO_IF(signed_nread < 0);
490  return 0;
491}
492
493ssize_t WRAP(sendmsg)(int sockfd,
494                      const struct msghdr* msg,
495                      int flags,
496                      int* count) {
497  ssize_t signed_nread = ki_sendmsg(sockfd, msg, flags);
498  *count = static_cast<int>(signed_nread);
499  RTN_ERRNO_IF(signed_nread < 0);
500  return 0;
501}
502
503int WRAP(shutdown)(int sockfd, int how) {
504  RTN_ERRNO_IF(ki_shutdown(sockfd, how) < 0);
505  return 0;
506}
507
508int WRAP(socket)(int domain, int type, int protocol, int* sd) {
509  *sd = ki_socket(domain, type, protocol);
510  RTN_ERRNO_IF(*sd < 0);
511  return 0;
512}
513
514int WRAP(socketpair)(int domain, int type, int protocol, int* sv) {
515  RTN_ERRNO_IF(ki_socketpair(domain, type, protocol, sv) < 0);
516  return 0;
517}
518
519static void assign_real_pointers() {
520  static bool assigned = false;
521  if (!assigned) {
522    EXPAND_SYMBOL_LIST_OPERATION(ASSIGN_REAL_PTR)
523    assigned = true;
524  }
525}
526
527#define CHECK_REAL(func)    \
528  if (!REAL(func)) {        \
529    assign_real_pointers(); \
530    if (!REAL(func))        \
531      return ENOSYS;        \
532  }
533
534// "real" functions, i.e. the unwrapped original functions.
535
536int _real_close(int fd) {
537  CHECK_REAL(close);
538  return REAL(close)(fd);
539}
540
541void _real_exit(int status) {
542  if (!REAL(exit))
543    assign_real_pointers();
544  REAL(exit)(status);
545}
546
547int _real_fstat(int fd, struct stat* buf) {
548  struct nacl_abi_stat st;
549  CHECK_REAL(fstat);
550  int err = REAL(fstat)(fd, &st);
551  if (err) {
552    errno = err;
553    return -1;
554  }
555
556  nacl_stat_to_stat(&st, buf);
557  return 0;
558}
559
560int _real_getdents(int fd, void* buf, size_t count, size_t* nread) {
561  // "buf" contains dirent(s); "nacl_buf" contains nacl_abi_dirent(s).
562  // See WRAP(getdents) above.
563  char* nacl_buf = (char*)alloca(count);
564  size_t offset = 0;
565  size_t nacl_offset = 0;
566  size_t nacl_nread;
567  CHECK_REAL(getdents);
568  int err = REAL(getdents)(fd, (dirent*)nacl_buf, count, &nacl_nread);
569  if (err)
570    return err;
571
572  while (nacl_offset < nacl_nread) {
573    dirent* d = (dirent*)((char*)buf + offset);
574    nacl_abi_dirent* nacl_d = (nacl_abi_dirent*)(nacl_buf + nacl_offset);
575    d->d_ino = nacl_d->nacl_abi_d_ino;
576    d->d_off = nacl_d->nacl_abi_d_off;
577    d->d_reclen = nacl_d->nacl_abi_d_reclen + d_name_shift;
578    size_t d_name_len =
579        nacl_d->nacl_abi_d_reclen - offsetof(nacl_abi_dirent, nacl_abi_d_name);
580    memcpy(d->d_name, nacl_d->nacl_abi_d_name, d_name_len);
581
582    offset += d->d_reclen;
583    offset += nacl_d->nacl_abi_d_reclen;
584  }
585
586  *nread = offset;
587  return 0;
588}
589
590int _real_lseek(int fd, off_t offset, int whence, off_t* new_offset) {
591  CHECK_REAL(seek);
592  return REAL(seek)(fd, offset, whence, new_offset);
593}
594
595int _real_mkdir(const char* pathname, mode_t mode) {
596  CHECK_REAL(mkdir);
597  return REAL(mkdir)(pathname, mode);
598}
599
600int _real_mmap(void** addr,
601               size_t length,
602               int prot,
603               int flags,
604               int fd,
605               off_t offset) {
606  CHECK_REAL(mmap);
607  return REAL(mmap)(addr, length, prot, flags, fd, offset);
608}
609
610int _real_munmap(void* addr, size_t length) {
611  CHECK_REAL(munmap);
612  return REAL(munmap)(addr, length);
613}
614
615int _real_open(const char* pathname, int oflag, mode_t mode, int* newfd) {
616  CHECK_REAL(open);
617  return REAL(open)(pathname, oflag, mode, newfd);
618}
619
620int _real_open_resource(const char* file, int* fd) {
621  CHECK_REAL(open_resource);
622  return REAL(open_resource)(file, fd);
623}
624
625int _real_read(int fd, void* buf, size_t count, size_t* nread) {
626  CHECK_REAL(read);
627  return REAL(read)(fd, buf, count, nread);
628}
629
630int _real_rmdir(const char* pathname) {
631  CHECK_REAL(rmdir);
632  return REAL(rmdir)(pathname);
633}
634
635int _real_write(int fd, const void* buf, size_t count, size_t* nwrote) {
636  CHECK_REAL(write);
637  return REAL(write)(fd, buf, count, nwrote);
638}
639
640int _real_getcwd(char* pathname, size_t len) {
641  CHECK_REAL(getcwd);
642  return REAL(getcwd)(pathname, len);
643}
644
645static bool s_wrapped = false;
646void kernel_wrap_init() {
647  if (!s_wrapped) {
648    LOG_TRACE("kernel_wrap_init");
649    assign_real_pointers();
650    EXPAND_SYMBOL_LIST_OPERATION(USE_WRAP)
651    s_wrapped = true;
652  }
653}
654
655void kernel_wrap_uninit() {
656  if (s_wrapped) {
657    LOG_TRACE("kernel_wrap_uninit");
658    EXPAND_SYMBOL_LIST_OPERATION(USE_REAL)
659    s_wrapped = false;
660  }
661}
662
663EXTERN_C_END
664
665#endif  // defined(__native_client__) && defined(__GLIBC__)
666