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c5c84d16 WL |
1 | /* |
2 | * file related system call shims and definitions | |
3 | * | |
4 | * Copyright (c) 2013 Stacey D. Son | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
9c092804 MA |
20 | #ifndef BSD_FILE_H |
21 | #define BSD_FILE_H | |
c5c84d16 WL |
22 | |
23 | #include "qemu/path.h" | |
24 | ||
77d3522b WL |
25 | #define LOCK_PATH(p, arg) \ |
26 | do { \ | |
27 | (p) = lock_user_string(arg); \ | |
28 | if ((p) == NULL) { \ | |
29 | return -TARGET_EFAULT; \ | |
30 | } \ | |
31 | } while (0) | |
32 | ||
33 | #define UNLOCK_PATH(p, arg) unlock_user(p, arg, 0) | |
34 | ||
ab5fd2d9 WL |
35 | #define LOCK_PATH2(p1, arg1, p2, arg2) \ |
36 | do { \ | |
37 | (p1) = lock_user_string(arg1); \ | |
38 | if ((p1) == NULL) { \ | |
39 | return -TARGET_EFAULT; \ | |
40 | } \ | |
41 | (p2) = lock_user_string(arg2); \ | |
42 | if ((p2) == NULL) { \ | |
43 | unlock_user(p1, arg1, 0); \ | |
44 | return -TARGET_EFAULT; \ | |
45 | } \ | |
46 | } while (0) | |
47 | ||
48 | #define UNLOCK_PATH2(p1, arg1, p2, arg2) \ | |
49 | do { \ | |
50 | unlock_user(p2, arg2, 0); \ | |
51 | unlock_user(p1, arg1, 0); \ | |
52 | } while (0) | |
77d3522b | 53 | |
c5c84d16 WL |
54 | extern struct iovec *lock_iovec(int type, abi_ulong target_addr, int count, |
55 | int copy); | |
56 | extern void unlock_iovec(struct iovec *vec, abi_ulong target_addr, int count, | |
57 | int copy); | |
58 | ||
77d3522b WL |
59 | int safe_open(const char *path, int flags, mode_t mode); |
60 | int safe_openat(int fd, const char *path, int flags, mode_t mode); | |
61 | ||
80da1b00 WL |
62 | ssize_t safe_read(int fd, void *buf, size_t nbytes); |
63 | ssize_t safe_pread(int fd, void *buf, size_t nbytes, off_t offset); | |
64 | ssize_t safe_readv(int fd, const struct iovec *iov, int iovcnt); | |
65 | ssize_t safe_preadv(int fd, const struct iovec *iov, int iovcnt, off_t offset); | |
66 | ||
770d8aba WL |
67 | ssize_t safe_write(int fd, void *buf, size_t nbytes); |
68 | ssize_t safe_pwrite(int fd, void *buf, size_t nbytes, off_t offset); | |
69 | ssize_t safe_writev(int fd, const struct iovec *iov, int iovcnt); | |
70 | ssize_t safe_pwritev(int fd, const struct iovec *iov, int iovcnt, off_t offset); | |
71 | ||
80da1b00 WL |
72 | /* read(2) */ |
73 | static abi_long do_bsd_read(abi_long arg1, abi_long arg2, abi_long arg3) | |
74 | { | |
75 | abi_long ret; | |
76 | void *p; | |
77 | ||
78 | p = lock_user(VERIFY_WRITE, arg2, arg3, 0); | |
79 | if (p == NULL) { | |
80 | return -TARGET_EFAULT; | |
81 | } | |
82 | ret = get_errno(safe_read(arg1, p, arg3)); | |
83 | unlock_user(p, arg2, ret); | |
84 | ||
85 | return ret; | |
86 | } | |
87 | ||
88 | /* pread(2) */ | |
89 | static abi_long do_bsd_pread(void *cpu_env, abi_long arg1, | |
90 | abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) | |
91 | { | |
92 | abi_long ret; | |
93 | void *p; | |
94 | ||
95 | p = lock_user(VERIFY_WRITE, arg2, arg3, 0); | |
96 | if (p == NULL) { | |
97 | return -TARGET_EFAULT; | |
98 | } | |
99 | if (regpairs_aligned(cpu_env) != 0) { | |
100 | arg4 = arg5; | |
101 | arg5 = arg6; | |
102 | } | |
103 | ret = get_errno(safe_pread(arg1, p, arg3, target_arg64(arg4, arg5))); | |
104 | unlock_user(p, arg2, ret); | |
105 | ||
106 | return ret; | |
107 | } | |
108 | ||
109 | /* readv(2) */ | |
110 | static abi_long do_bsd_readv(abi_long arg1, abi_long arg2, abi_long arg3) | |
111 | { | |
112 | abi_long ret; | |
113 | struct iovec *vec = lock_iovec(VERIFY_WRITE, arg2, arg3, 0); | |
114 | ||
115 | if (vec != NULL) { | |
116 | ret = get_errno(safe_readv(arg1, vec, arg3)); | |
117 | unlock_iovec(vec, arg2, arg3, 1); | |
118 | } else { | |
119 | ret = -host_to_target_errno(errno); | |
120 | } | |
121 | ||
122 | return ret; | |
123 | } | |
124 | ||
125 | /* preadv(2) */ | |
126 | static abi_long do_bsd_preadv(void *cpu_env, abi_long arg1, | |
127 | abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) | |
128 | { | |
129 | abi_long ret; | |
130 | struct iovec *vec = lock_iovec(VERIFY_WRITE, arg2, arg3, 1); | |
131 | ||
132 | if (vec != NULL) { | |
133 | if (regpairs_aligned(cpu_env) != 0) { | |
134 | arg4 = arg5; | |
135 | arg5 = arg6; | |
136 | } | |
137 | ret = get_errno(safe_preadv(arg1, vec, arg3, target_arg64(arg4, arg5))); | |
138 | unlock_iovec(vec, arg2, arg3, 0); | |
139 | } else { | |
140 | ret = -host_to_target_errno(errno); | |
141 | } | |
142 | ||
143 | return ret; | |
144 | } | |
145 | ||
770d8aba WL |
146 | /* write(2) */ |
147 | static abi_long do_bsd_write(abi_long arg1, abi_long arg2, abi_long arg3) | |
148 | { | |
149 | abi_long nbytes, ret; | |
150 | void *p; | |
151 | ||
152 | /* nbytes < 0 implies that it was larger than SIZE_MAX. */ | |
153 | nbytes = arg3; | |
154 | if (nbytes < 0) { | |
155 | return -TARGET_EINVAL; | |
156 | } | |
157 | p = lock_user(VERIFY_READ, arg2, nbytes, 1); | |
158 | if (p == NULL) { | |
159 | return -TARGET_EFAULT; | |
160 | } | |
161 | ret = get_errno(safe_write(arg1, p, arg3)); | |
162 | unlock_user(p, arg2, 0); | |
163 | ||
164 | return ret; | |
165 | } | |
166 | ||
167 | /* pwrite(2) */ | |
168 | static abi_long do_bsd_pwrite(void *cpu_env, abi_long arg1, | |
169 | abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) | |
170 | { | |
171 | abi_long ret; | |
172 | void *p; | |
173 | ||
174 | p = lock_user(VERIFY_READ, arg2, arg3, 1); | |
175 | if (p == NULL) { | |
176 | return -TARGET_EFAULT; | |
177 | } | |
178 | if (regpairs_aligned(cpu_env) != 0) { | |
179 | arg4 = arg5; | |
180 | arg5 = arg6; | |
181 | } | |
182 | ret = get_errno(safe_pwrite(arg1, p, arg3, target_arg64(arg4, arg5))); | |
183 | unlock_user(p, arg2, 0); | |
184 | ||
185 | return ret; | |
186 | } | |
187 | ||
188 | /* writev(2) */ | |
189 | static abi_long do_bsd_writev(abi_long arg1, abi_long arg2, abi_long arg3) | |
190 | { | |
191 | abi_long ret; | |
192 | struct iovec *vec = lock_iovec(VERIFY_READ, arg2, arg3, 1); | |
193 | ||
194 | if (vec != NULL) { | |
195 | ret = get_errno(safe_writev(arg1, vec, arg3)); | |
196 | unlock_iovec(vec, arg2, arg3, 0); | |
197 | } else { | |
198 | ret = -host_to_target_errno(errno); | |
199 | } | |
200 | ||
201 | return ret; | |
202 | } | |
203 | ||
204 | /* pwritev(2) */ | |
205 | static abi_long do_bsd_pwritev(void *cpu_env, abi_long arg1, | |
206 | abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) | |
207 | { | |
208 | abi_long ret; | |
209 | struct iovec *vec = lock_iovec(VERIFY_READ, arg2, arg3, 1); | |
210 | ||
211 | if (vec != NULL) { | |
212 | if (regpairs_aligned(cpu_env) != 0) { | |
213 | arg4 = arg5; | |
214 | arg5 = arg6; | |
215 | } | |
216 | ret = get_errno(safe_pwritev(arg1, vec, arg3, target_arg64(arg4, arg5))); | |
217 | unlock_iovec(vec, arg2, arg3, 0); | |
218 | } else { | |
219 | ret = -host_to_target_errno(errno); | |
220 | } | |
221 | ||
222 | return ret; | |
223 | } | |
224 | ||
77d3522b WL |
225 | /* open(2) */ |
226 | static abi_long do_bsd_open(abi_long arg1, abi_long arg2, abi_long arg3) | |
227 | { | |
228 | abi_long ret; | |
229 | void *p; | |
230 | ||
231 | LOCK_PATH(p, arg1); | |
232 | ret = get_errno(safe_open(path(p), target_to_host_bitmask(arg2, | |
233 | fcntl_flags_tbl), arg3)); | |
234 | UNLOCK_PATH(p, arg1); | |
235 | ||
236 | return ret; | |
237 | } | |
238 | ||
239 | /* openat(2) */ | |
240 | static abi_long do_bsd_openat(abi_long arg1, abi_long arg2, | |
241 | abi_long arg3, abi_long arg4) | |
242 | { | |
243 | abi_long ret; | |
244 | void *p; | |
245 | ||
246 | LOCK_PATH(p, arg2); | |
247 | ret = get_errno(safe_openat(arg1, path(p), | |
248 | target_to_host_bitmask(arg3, fcntl_flags_tbl), arg4)); | |
249 | UNLOCK_PATH(p, arg2); | |
250 | ||
251 | return ret; | |
252 | } | |
253 | ||
254 | /* close(2) */ | |
255 | static inline abi_long do_bsd_close(abi_long arg1) | |
256 | { | |
257 | return get_errno(close(arg1)); | |
258 | } | |
259 | ||
a2ba6c7b WL |
260 | /* fdatasync(2) */ |
261 | static abi_long do_bsd_fdatasync(abi_long arg1) | |
262 | { | |
263 | return get_errno(fdatasync(arg1)); | |
264 | } | |
265 | ||
266 | /* fsync(2) */ | |
267 | static abi_long do_bsd_fsync(abi_long arg1) | |
268 | { | |
269 | return get_errno(fsync(arg1)); | |
270 | } | |
271 | ||
272 | /* closefrom(2) */ | |
273 | static abi_long do_bsd_closefrom(abi_long arg1) | |
274 | { | |
275 | closefrom(arg1); /* returns void */ | |
276 | return get_errno(0); | |
277 | } | |
278 | ||
65c6c4c8 WL |
279 | /* revoke(2) */ |
280 | static abi_long do_bsd_revoke(abi_long arg1) | |
281 | { | |
282 | abi_long ret; | |
283 | void *p; | |
284 | ||
285 | LOCK_PATH(p, arg1); | |
286 | ret = get_errno(revoke(p)); /* XXX path(p)? */ | |
287 | UNLOCK_PATH(p, arg1); | |
288 | ||
289 | return ret; | |
290 | } | |
291 | ||
292 | /* access(2) */ | |
293 | static abi_long do_bsd_access(abi_long arg1, abi_long arg2) | |
294 | { | |
295 | abi_long ret; | |
296 | void *p; | |
297 | ||
298 | LOCK_PATH(p, arg1); | |
299 | ret = get_errno(access(path(p), arg2)); | |
300 | UNLOCK_PATH(p, arg1); | |
301 | ||
302 | return ret; | |
303 | } | |
304 | ||
305 | /* eaccess(2) */ | |
306 | static abi_long do_bsd_eaccess(abi_long arg1, abi_long arg2) | |
307 | { | |
308 | abi_long ret; | |
309 | void *p; | |
310 | ||
311 | LOCK_PATH(p, arg1); | |
312 | ret = get_errno(eaccess(path(p), arg2)); | |
313 | UNLOCK_PATH(p, arg1); | |
314 | ||
315 | return ret; | |
316 | } | |
317 | ||
318 | /* faccessat(2) */ | |
319 | static abi_long do_bsd_faccessat(abi_long arg1, abi_long arg2, | |
320 | abi_long arg3, abi_long arg4) | |
321 | { | |
322 | abi_long ret; | |
323 | void *p; | |
324 | ||
325 | LOCK_PATH(p, arg2); | |
326 | ret = get_errno(faccessat(arg1, p, arg3, arg4)); /* XXX path(p)? */ | |
327 | UNLOCK_PATH(p, arg2); | |
328 | ||
329 | return ret; | |
330 | } | |
331 | ||
390f547e WL |
332 | /* chdir(2) */ |
333 | static abi_long do_bsd_chdir(abi_long arg1) | |
334 | { | |
335 | abi_long ret; | |
336 | void *p; | |
337 | ||
338 | LOCK_PATH(p, arg1); | |
339 | ret = get_errno(chdir(p)); /* XXX path(p)? */ | |
340 | UNLOCK_PATH(p, arg1); | |
341 | ||
342 | return ret; | |
343 | } | |
344 | ||
345 | /* fchdir(2) */ | |
346 | static abi_long do_bsd_fchdir(abi_long arg1) | |
347 | { | |
348 | return get_errno(fchdir(arg1)); | |
349 | } | |
350 | ||
ab5fd2d9 WL |
351 | /* rename(2) */ |
352 | static abi_long do_bsd_rename(abi_long arg1, abi_long arg2) | |
353 | { | |
354 | abi_long ret; | |
355 | void *p1, *p2; | |
356 | ||
357 | LOCK_PATH2(p1, arg1, p2, arg2); | |
358 | ret = get_errno(rename(p1, p2)); /* XXX path(p1), path(p2) */ | |
359 | UNLOCK_PATH2(p1, arg1, p2, arg2); | |
360 | ||
361 | return ret; | |
362 | } | |
363 | ||
364 | /* renameat(2) */ | |
365 | static abi_long do_bsd_renameat(abi_long arg1, abi_long arg2, | |
366 | abi_long arg3, abi_long arg4) | |
367 | { | |
368 | abi_long ret; | |
369 | void *p1, *p2; | |
370 | ||
371 | LOCK_PATH2(p1, arg2, p2, arg4); | |
372 | ret = get_errno(renameat(arg1, p1, arg3, p2)); | |
373 | UNLOCK_PATH2(p1, arg2, p2, arg4); | |
374 | ||
375 | return ret; | |
376 | } | |
377 | ||
2d3b7e01 WL |
378 | /* link(2) */ |
379 | static abi_long do_bsd_link(abi_long arg1, abi_long arg2) | |
380 | { | |
381 | abi_long ret; | |
382 | void *p1, *p2; | |
383 | ||
384 | LOCK_PATH2(p1, arg1, p2, arg2); | |
385 | ret = get_errno(link(p1, p2)); /* XXX path(p1), path(p2) */ | |
386 | UNLOCK_PATH2(p1, arg1, p2, arg2); | |
387 | ||
388 | return ret; | |
389 | } | |
390 | ||
391 | /* linkat(2) */ | |
392 | static abi_long do_bsd_linkat(abi_long arg1, abi_long arg2, | |
393 | abi_long arg3, abi_long arg4, abi_long arg5) | |
394 | { | |
395 | abi_long ret; | |
396 | void *p1, *p2; | |
397 | ||
398 | LOCK_PATH2(p1, arg2, p2, arg4); | |
399 | ret = get_errno(linkat(arg1, p1, arg3, p2, arg5)); | |
400 | UNLOCK_PATH2(p1, arg2, p2, arg4); | |
401 | ||
402 | return ret; | |
403 | } | |
404 | ||
405 | /* unlink(2) */ | |
406 | static abi_long do_bsd_unlink(abi_long arg1) | |
407 | { | |
408 | abi_long ret; | |
409 | void *p; | |
410 | ||
411 | LOCK_PATH(p, arg1); | |
412 | ret = get_errno(unlink(p)); /* XXX path(p) */ | |
413 | UNLOCK_PATH(p, arg1); | |
414 | ||
415 | return ret; | |
416 | } | |
417 | ||
418 | /* unlinkat(2) */ | |
419 | static abi_long do_bsd_unlinkat(abi_long arg1, abi_long arg2, | |
420 | abi_long arg3) | |
421 | { | |
422 | abi_long ret; | |
423 | void *p; | |
424 | ||
425 | LOCK_PATH(p, arg2); | |
426 | ret = get_errno(unlinkat(arg1, p, arg3)); /* XXX path(p) */ | |
427 | UNLOCK_PATH(p, arg2); | |
428 | ||
429 | return ret; | |
430 | } | |
431 | ||
1ffbd5e7 WL |
432 | /* mkdir(2) */ |
433 | static abi_long do_bsd_mkdir(abi_long arg1, abi_long arg2) | |
434 | { | |
435 | abi_long ret; | |
436 | void *p; | |
437 | ||
438 | LOCK_PATH(p, arg1); | |
439 | ret = get_errno(mkdir(p, arg2)); /* XXX path(p) */ | |
440 | UNLOCK_PATH(p, arg1); | |
441 | ||
442 | return ret; | |
443 | } | |
444 | ||
445 | /* mkdirat(2) */ | |
446 | static abi_long do_bsd_mkdirat(abi_long arg1, abi_long arg2, | |
447 | abi_long arg3) | |
448 | { | |
449 | abi_long ret; | |
450 | void *p; | |
451 | ||
452 | LOCK_PATH(p, arg2); | |
453 | ret = get_errno(mkdirat(arg1, p, arg3)); | |
454 | UNLOCK_PATH(p, arg2); | |
455 | ||
456 | return ret; | |
457 | } | |
458 | ||
6af8f76a WL |
459 | /* rmdir(2) */ |
460 | static abi_long do_bsd_rmdir(abi_long arg1) | |
461 | { | |
462 | abi_long ret; | |
463 | void *p; | |
464 | ||
465 | LOCK_PATH(p, arg1); | |
466 | ret = get_errno(rmdir(p)); /* XXX path(p)? */ | |
467 | UNLOCK_PATH(p, arg1); | |
468 | ||
469 | return ret; | |
470 | } | |
471 | ||
472 | /* undocumented __getcwd(char *buf, size_t len) system call */ | |
473 | static abi_long do_bsd___getcwd(abi_long arg1, abi_long arg2) | |
474 | { | |
475 | abi_long ret; | |
476 | void *p; | |
477 | ||
478 | p = lock_user(VERIFY_WRITE, arg1, arg2, 0); | |
479 | if (p == NULL) { | |
480 | return -TARGET_EFAULT; | |
481 | } | |
482 | ret = safe_syscall(SYS___getcwd, p, arg2); | |
483 | unlock_user(p, arg1, ret == 0 ? strlen(p) + 1 : 0); | |
484 | ||
485 | return get_errno(ret); | |
486 | } | |
487 | ||
a15699ac WL |
488 | /* dup(2) */ |
489 | static abi_long do_bsd_dup(abi_long arg1) | |
490 | { | |
491 | return get_errno(dup(arg1)); | |
492 | } | |
493 | ||
494 | /* dup2(2) */ | |
495 | static abi_long do_bsd_dup2(abi_long arg1, abi_long arg2) | |
496 | { | |
497 | return get_errno(dup2(arg1, arg2)); | |
498 | } | |
499 | ||
4b795b14 WL |
500 | /* truncate(2) */ |
501 | static abi_long do_bsd_truncate(void *cpu_env, abi_long arg1, | |
502 | abi_long arg2, abi_long arg3, abi_long arg4) | |
503 | { | |
504 | abi_long ret; | |
505 | void *p; | |
506 | ||
507 | LOCK_PATH(p, arg1); | |
508 | if (regpairs_aligned(cpu_env) != 0) { | |
509 | arg2 = arg3; | |
510 | arg3 = arg4; | |
511 | } | |
512 | ret = get_errno(truncate(p, target_arg64(arg2, arg3))); | |
513 | UNLOCK_PATH(p, arg1); | |
514 | ||
515 | return ret; | |
516 | } | |
517 | ||
518 | /* ftruncate(2) */ | |
519 | static abi_long do_bsd_ftruncate(void *cpu_env, abi_long arg1, | |
520 | abi_long arg2, abi_long arg3, abi_long arg4) | |
521 | { | |
522 | if (regpairs_aligned(cpu_env) != 0) { | |
523 | arg2 = arg3; | |
524 | arg3 = arg4; | |
525 | } | |
526 | return get_errno(ftruncate(arg1, target_arg64(arg2, arg3))); | |
527 | } | |
528 | ||
9c092804 | 529 | #endif /* BSD_FILE_H */ |