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Roll src/third_party/WebKit 6cdd902:94953d6 (svn 197985:197991)
[chromium-blink-merge.git] / native_client_sdk / src / libraries / nacl_io / kernel_wrap_glibc.cc
blob158c52a4f8992ac4d9b3793eb8fff957100dd5a9
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
30 namespace {
31
32 void 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
52 void 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
78 typedef int64_t nacl_abi___ino_t;
79 typedef 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
84 typedef int64_t nacl_abi__off_t;
85 typedef 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
97 struct 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
104 static const int d_name_shift = offsetof (dirent, d_name) -
105 offsetof (struct nacl_abi_dirent, nacl_abi_d_name);
106
107 EXTERN_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(rename); \
179 OP(readlink); \
180 OP(utimes);
181
182 // TODO(bradnelson): Add these as well.
183 // OP(epoll_create);
184 // OP(epoll_create1);
185 // OP(epoll_ctl);
186 // OP(epoll_pwait);
187 // OP(ppoll);
188 // OP(pselect);
189
190 EXPAND_SYMBOL_LIST_OPERATION(DECLARE_REAL_PTR);
191
192 int WRAP(chdir)(const char* pathname) {
193 ERRNO_RTN(ki_chdir(pathname));
194 }
195
196 int WRAP(close)(int fd) {
197 ERRNO_RTN(ki_close(fd));
198 }
199
200 int WRAP(dup)(int fd, int* newfd) NOTHROW {
201 *newfd = ki_dup(fd);
202 RTN_ERRNO_IF(*newfd < 0);
203 return 0;
204 }
205
206 int WRAP(dup2)(int fd, int newfd) NOTHROW {
207 ERRNO_RTN(ki_dup2(fd, newfd));
208 }
209
210 void WRAP(exit)(int status) {
211 ki_exit(status);
212 }
213
214 int WRAP(fstat)(int fd, struct nacl_abi_stat* nacl_buf) {
215 struct stat buf;
216 memset(&buf, 0, sizeof(struct stat));
217 int res = ki_fstat(fd, &buf);
218 RTN_ERRNO_IF(res < 0);
219 stat_to_nacl_stat(&buf, nacl_buf);
220 return 0;
221 }
222
223 int WRAP(getcwd)(char* buf, size_t size) {
224 RTN_ERRNO_IF(ki_getcwd(buf, size) == NULL);
225 return 0;
226 }
227
228 int WRAP(getdents)(int fd, dirent* nacl_buf, size_t nacl_count, size_t* nread) {
229 int nacl_offset = 0;
230 // "buf" contains dirent(s); "nacl_buf" contains nacl_abi_dirent(s).
231 // nacl_abi_dirent(s) are smaller than dirent(s), so nacl_count bytes buffer
232 // is enough
233 char* buf = (char*)alloca(nacl_count);
234 int offset = 0;
235 int count;
236
237 count = ki_getdents(fd, buf, nacl_count);
238 RTN_ERRNO_IF(count < 0);
239
240 while (offset < count) {
241 dirent* d = (dirent*)(buf + offset);
242 nacl_abi_dirent* nacl_d = (nacl_abi_dirent*)((char*)nacl_buf + nacl_offset);
243 nacl_d->nacl_abi_d_ino = d->d_ino;
244 nacl_d->nacl_abi_d_off = d->d_off;
245 nacl_d->nacl_abi_d_reclen = d->d_reclen - d_name_shift;
246 size_t d_name_len = d->d_reclen - offsetof(dirent, d_name);
247 memcpy(nacl_d->nacl_abi_d_name, d->d_name, d_name_len);
248
249 offset += d->d_reclen;
250 nacl_offset += nacl_d->nacl_abi_d_reclen;
251 }
252
253 *nread = nacl_offset;
254 return 0;
255 }
256
257 int WRAP(mkdir)(const char* pathname, mode_t mode) {
258 RTN_ERRNO_IF(ki_mkdir(pathname, mode) < 0);
259 return 0;
260 }
261
262 int WRAP(mmap)(void** addr,
263 size_t length,
264 int prot,
265 int flags,
266 int fd,
267 off_t offset) {
268 if (flags & MAP_ANONYMOUS)
269 return REAL(mmap)(addr, length, prot, flags, fd, offset);
270
271 *addr = ki_mmap(*addr, length, prot, flags, fd, offset);
272 RTN_ERRNO_IF(*addr == (void*)-1);
273 return 0;
274 }
275
276 int WRAP(munmap)(void* addr, size_t length) {
277 // Always let the real munmap run on the address range. It is not an error if
278 // there are no mapped pages in that range.
279 ki_munmap(addr, length);
280 return REAL(munmap)(addr, length);
281 }
282
283 int WRAP(open)(const char* pathname, int oflag, mode_t mode, int* newfd) {
284 *newfd = ki_open(pathname, oflag, mode);
285 RTN_ERRNO_IF(*newfd < 0);
286 return 0;
287 }
288
289 int WRAP(open_resource)(const char* file, int* fd) {
290 *fd = ki_open_resource(file);
291 RTN_ERRNO_IF(*fd < 0);
292 return 0;
293 }
294
295 int WRAP(poll)(struct pollfd* fds, nfds_t nfds, int timeout, int* count) {
296 *count = ki_poll(fds, nfds, timeout);
297 RTN_ERRNO_IF(*count < 0);
298 return 0;
299 }
300
301 int WRAP(read)(int fd, void* buf, size_t count, size_t* nread) {
302 ssize_t signed_nread = ki_read(fd, buf, count);
303 *nread = static_cast<size_t>(signed_nread);
304 RTN_ERRNO_IF(signed_nread < 0);
305 return 0;
306 }
307
308 int WRAP(rmdir)(const char* pathname) {
309 RTN_ERRNO_IF(ki_rmdir(pathname) < 0);
310 return 0;
311 }
312
313 int WRAP(seek)(int fd, off_t offset, int whence, off_t* new_offset) {
314 *new_offset = ki_lseek(fd, offset, whence);
315 RTN_ERRNO_IF(*new_offset < 0);
316 return 0;
317 }
318
319 int WRAP(select)(int nfds,
320 fd_set* readfds,
321 fd_set* writefds,
322 fd_set* exceptfds,
323 struct timeval* timeout,
324 int* count) {
325 *count = ki_select(nfds, readfds, writefds, exceptfds, timeout);
326 RTN_ERRNO_IF(*count < 0);
327 return 0;
328 }
329
330 int WRAP(stat)(const char* pathname, struct nacl_abi_stat* nacl_buf) {
331 struct stat buf;
332 memset(&buf, 0, sizeof(struct stat));
333 int res = ki_stat(pathname, &buf);
334 RTN_ERRNO_IF(res < 0);
335 stat_to_nacl_stat(&buf, nacl_buf);
336 return 0;
337 }
338
339 int WRAP(lstat)(const char* pathname, struct nacl_abi_stat* nacl_buf) {
340 struct stat buf;
341 memset(&buf, 0, sizeof(struct stat));
342 int res = ki_lstat(pathname, &buf);
343 RTN_ERRNO_IF(res < 0);
344 stat_to_nacl_stat(&buf, nacl_buf);
345 return 0;
346 }
347
348 int WRAP(link)(const char* pathname, const char* newpath) {
349 ERRNO_RTN(ki_link(pathname, newpath));
350 }
351
352 int WRAP(rename)(const char* pathname, const char* newpath) {
353 ERRNO_RTN(ki_rename(pathname, newpath));
354 }
355
356 int WRAP(readlink)(const char* pathname,
357 char* buf,
358 size_t count,
359 size_t* nread) {
360 int rtn = ki_readlink(pathname, buf, count);
361 RTN_ERRNO_IF(rtn < 0);
362 *nread = rtn;
363 return 0;
364 }
365
366 int WRAP(utimes)(const char *filename, const struct timeval *times) {
367 ERRNO_RTN(ki_utimes(filename, times));
368 }
369
370 int WRAP(chmod)(const char* pathname, mode_t mode) {
371 ERRNO_RTN(ki_chmod(pathname, mode));
372 }
373
374 int WRAP(access)(const char* pathname, int amode) {
375 ERRNO_RTN(ki_access(pathname, amode));
376 }
377
378 int WRAP(unlink)(const char* pathname) {
379 ERRNO_RTN(ki_unlink(pathname));
380 }
381
382 int WRAP(fchdir)(int fd) {
383 ERRNO_RTN(ki_fchdir(fd));
384 }
385
386 int WRAP(fchmod)(int fd, mode_t mode) {
387 ERRNO_RTN(ki_fchmod(fd, mode));
388 }
389
390 int WRAP(fsync)(int fd) {
391 ERRNO_RTN(ki_fsync(fd));
392 }
393
394 int WRAP(fdatasync)(int fd) {
395 ERRNO_RTN(ki_fdatasync(fd));
396 }
397
398 int WRAP(write)(int fd, const void* buf, size_t count, size_t* nwrote) {
399 ssize_t signed_nwrote = ki_write(fd, buf, count);
400 *nwrote = static_cast<size_t>(signed_nwrote);
401 RTN_ERRNO_IF(signed_nwrote < 0);
402 return 0;
403 }
404
405 int WRAP(accept)(int sockfd,
406 struct sockaddr* addr,
407 socklen_t* addrlen,
408 int* sd) {
409 *sd = ki_accept(sockfd, addr, addrlen);
410 RTN_ERRNO_IF(*sd < 0);
411 return 0;
412 }
413
414 int WRAP(bind)(int sockfd, const struct sockaddr* addr, socklen_t addrlen) {
415 ERRNO_RTN(ki_bind(sockfd, addr, addrlen));
416 }
417
418 int WRAP(connect)(int sockfd, const struct sockaddr* addr, socklen_t addrlen) {
419 ERRNO_RTN(ki_connect(sockfd, addr, addrlen));
420 }
421
422 int WRAP(getpeername)(int sockfd, struct sockaddr* addr, socklen_t* addrlen) {
423 ERRNO_RTN(ki_getpeername(sockfd, addr, addrlen));
424 }
425
426 int WRAP(getsockname)(int sockfd, struct sockaddr* addr, socklen_t* addrlen) {
427 ERRNO_RTN(ki_getsockname(sockfd, addr, addrlen));
428 }
429
430 int WRAP(getsockopt)(int sockfd,
431 int level,
432 int optname,
433 void* optval,
434 socklen_t* optlen) {
435 ERRNO_RTN(ki_getsockopt(sockfd, level, optname, optval, optlen));
436 }
437
438 int WRAP(setsockopt)(int sockfd,
439 int level,
440 int optname,
441 const void* optval,
442 socklen_t optlen) {
443 ERRNO_RTN(ki_setsockopt(sockfd, level, optname, optval, optlen));
444 }
445
446 int WRAP(listen)(int sockfd, int backlog) {
447 ERRNO_RTN(ki_listen(sockfd, backlog));
448 }
449
450 int WRAP(recv)(int sockfd, void* buf, size_t len, int flags, int* count) {
451 ssize_t signed_nread = ki_recv(sockfd, buf, len, flags);
452 *count = static_cast<int>(signed_nread);
453 RTN_ERRNO_IF(signed_nread < 0);
454 return 0;
455 }
456
457 int WRAP(recvfrom)(int sockfd,
458 void* buf,
459 size_t len,
460 int flags,
461 struct sockaddr* addr,
462 socklen_t* addrlen,
463 int* count) {
464 ssize_t signed_nread = ki_recvfrom(sockfd, buf, len, flags, addr, addrlen);
465 *count = static_cast<int>(signed_nread);
466 RTN_ERRNO_IF(signed_nread < 0);
467 return 0;
468 }
469
470 int WRAP(recvmsg)(int sockfd, struct msghdr* msg, int flags, int* count) {
471 ssize_t signed_nread = ki_recvmsg(sockfd, msg, flags);
472 *count = static_cast<int>(signed_nread);
473 RTN_ERRNO_IF(signed_nread < 0);
474 return 0;
475 }
476
477 ssize_t WRAP(send)(int sockfd, const void* buf, size_t len, int flags,
478 int* count) {
479 ssize_t signed_nread = ki_send(sockfd, buf, len, flags);
480 *count = static_cast<int>(signed_nread);
481 RTN_ERRNO_IF(signed_nread < 0);
482 return 0;
483 }
484
485 ssize_t WRAP(sendto)(int sockfd,
486 const void* buf,
487 size_t len,
488 int flags,
489 const struct sockaddr* addr,
490 socklen_t addrlen,
491 int* count) {
492 ssize_t signed_nread = ki_sendto(sockfd, buf, len, flags, addr, addrlen);
493 *count = static_cast<int>(signed_nread);
494 RTN_ERRNO_IF(signed_nread < 0);
495 return 0;
496 }
497
498 ssize_t WRAP(sendmsg)(int sockfd,
499 const struct msghdr* msg,
500 int flags,
501 int* count) {
502 ssize_t signed_nread = ki_sendmsg(sockfd, msg, flags);
503 *count = static_cast<int>(signed_nread);
504 RTN_ERRNO_IF(signed_nread < 0);
505 return 0;
506 }
507
508 int WRAP(shutdown)(int sockfd, int how) {
509 RTN_ERRNO_IF(ki_shutdown(sockfd, how) < 0);
510 return 0;
511 }
512
513 int WRAP(socket)(int domain, int type, int protocol, int* sd) {
514 *sd = ki_socket(domain, type, protocol);
515 RTN_ERRNO_IF(*sd < 0);
516 return 0;
517 }
518
519 int WRAP(socketpair)(int domain, int type, int protocol, int* sv) {
520 RTN_ERRNO_IF(ki_socketpair(domain, type, protocol, sv) < 0);
521 return 0;
522 }
523
524 static void assign_real_pointers() {
525 static bool assigned = false;
526 if (!assigned) {
527 EXPAND_SYMBOL_LIST_OPERATION(ASSIGN_REAL_PTR)
528 assigned = true;
529 }
530 }
531
532 #define CHECK_REAL(func) \
533 if (!REAL(func)) { \
534 assign_real_pointers(); \
535 if (!REAL(func)) \
536 return ENOSYS; \
537 }
538
539 // "real" functions, i.e. the unwrapped original functions.
540
541 int _real_close(int fd) {
542 CHECK_REAL(close);
543 return REAL(close)(fd);
544 }
545
546 void _real_exit(int status) {
547 if (!REAL(exit))
548 assign_real_pointers();
549 REAL(exit)(status);
550 }
551
552 int _real_fstat(int fd, struct stat* buf) {
553 struct nacl_abi_stat st;
554 CHECK_REAL(fstat);
555 int err = REAL(fstat)(fd, &st);
556 if (err) {
557 errno = err;
558 return -1;
559 }
560
561 nacl_stat_to_stat(&st, buf);
562 return 0;
563 }
564
565 int _real_getdents(int fd, void* buf, size_t count, size_t* nread) {
566 // "buf" contains dirent(s); "nacl_buf" contains nacl_abi_dirent(s).
567 // See WRAP(getdents) above.
568 char* nacl_buf = (char*)alloca(count);
569 size_t offset = 0;
570 size_t nacl_offset = 0;
571 size_t nacl_nread;
572 CHECK_REAL(getdents);
573 int err = REAL(getdents)(fd, (dirent*)nacl_buf, count, &nacl_nread);
574 if (err)
575 return err;
576
577 while (nacl_offset < nacl_nread) {
578 dirent* d = (dirent*)((char*)buf + offset);
579 nacl_abi_dirent* nacl_d = (nacl_abi_dirent*)(nacl_buf + nacl_offset);
580 d->d_ino = nacl_d->nacl_abi_d_ino;
581 d->d_off = nacl_d->nacl_abi_d_off;
582 d->d_reclen = nacl_d->nacl_abi_d_reclen + d_name_shift;
583 size_t d_name_len =
584 nacl_d->nacl_abi_d_reclen - offsetof(nacl_abi_dirent, nacl_abi_d_name);
585 memcpy(d->d_name, nacl_d->nacl_abi_d_name, d_name_len);
586
587 offset += d->d_reclen;
588 offset += nacl_d->nacl_abi_d_reclen;
589 }
590
591 *nread = offset;
592 return 0;
593 }
594
595 int _real_lseek(int fd, off_t offset, int whence, off_t* new_offset) {
596 CHECK_REAL(seek);
597 return REAL(seek)(fd, offset, whence, new_offset);
598 }
599
600 int _real_mkdir(const char* pathname, mode_t mode) {
601 CHECK_REAL(mkdir);
602 return REAL(mkdir)(pathname, mode);
603 }
604
605 int _real_mmap(void** addr,
606 size_t length,
607 int prot,
608 int flags,
609 int fd,
610 off_t offset) {
611 CHECK_REAL(mmap);
612 return REAL(mmap)(addr, length, prot, flags, fd, offset);
613 }
614
615 int _real_munmap(void* addr, size_t length) {
616 CHECK_REAL(munmap);
617 return REAL(munmap)(addr, length);
618 }
619
620 int _real_open(const char* pathname, int oflag, mode_t mode, int* newfd) {
621 CHECK_REAL(open);
622 return REAL(open)(pathname, oflag, mode, newfd);
623 }
624
625 int _real_open_resource(const char* file, int* fd) {
626 CHECK_REAL(open_resource);
627 return REAL(open_resource)(file, fd);
628 }
629
630 int _real_read(int fd, void* buf, size_t count, size_t* nread) {
631 CHECK_REAL(read);
632 return REAL(read)(fd, buf, count, nread);
633 }
634
635 int _real_rmdir(const char* pathname) {
636 CHECK_REAL(rmdir);
637 return REAL(rmdir)(pathname);
638 }
639
640 int _real_write(int fd, const void* buf, size_t count, size_t* nwrote) {
641 CHECK_REAL(write);
642 return REAL(write)(fd, buf, count, nwrote);
643 }
644
645 int _real_getcwd(char* pathname, size_t len) {
646 CHECK_REAL(getcwd);
647 return REAL(getcwd)(pathname, len);
648 }
649
650 static bool s_wrapped = false;
651 void kernel_wrap_init() {
652 if (!s_wrapped) {
653 LOG_TRACE("kernel_wrap_init");
654 assign_real_pointers();
655 EXPAND_SYMBOL_LIST_OPERATION(USE_WRAP)
656 s_wrapped = true;
657 }
658 }
659
660 void kernel_wrap_uninit() {
661 if (s_wrapped) {
662 LOG_TRACE("kernel_wrap_uninit");
663 EXPAND_SYMBOL_LIST_OPERATION(USE_REAL)
664 s_wrapped = false;
665 }
666 }
667
668 EXTERN_C_END
669
670 #endif // defined(__native_client__) && defined(__GLIBC__)