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Commit | Line | Data |
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c906108c | 1 | /* Remote target system call support. |
3666a048 | 2 | Copyright 1997-2021 Free Software Foundation, Inc. |
c906108c SS |
3 | Contributed by Cygnus Solutions. |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
4744ac1b | 9 | the Free Software Foundation; either version 3 of the License, or |
c906108c SS |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
4744ac1b | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
19 | |
20 | /* This interface isn't intended to be specific to any particular kind | |
21 | of remote (hardware, simulator, whatever). As such, support for it | |
22 | (e.g. sim/common/callback.c) should *not* live in the simulator source | |
23 | tree, nor should it live in the gdb source tree. K&R C must be | |
24 | supported. */ | |
25 | ||
6df01ab8 MF |
26 | /* This must come before any other includes. */ |
27 | #include "defs.h" | |
28 | ||
20a8e078 MF |
29 | #include <errno.h> |
30 | #include <fcntl.h> | |
c906108c | 31 | #include <stdarg.h> |
c906108c | 32 | #include <stdio.h> |
c906108c | 33 | #include <stdlib.h> |
027e2a04 | 34 | #include <string.h> |
20a8e078 | 35 | #include <time.h> |
c906108c SS |
36 | #ifdef HAVE_UNISTD_H |
37 | #include <unistd.h> | |
38 | #endif | |
c906108c | 39 | #include <sys/stat.h> |
20a8e078 MF |
40 | #include <sys/types.h> |
41 | ||
42 | #include "ansidecl.h" | |
43 | #include "libiberty.h" | |
44 | ||
df68e12b | 45 | #include "sim/callback.h" |
c906108c SS |
46 | |
47 | #ifndef ENOSYS | |
48 | #define ENOSYS EINVAL | |
49 | #endif | |
50 | #ifndef ENAMETOOLONG | |
51 | #define ENAMETOOLONG EINVAL | |
52 | #endif | |
53 | ||
54 | /* Maximum length of a path name. */ | |
55 | #ifndef MAX_PATH_LEN | |
56 | #define MAX_PATH_LEN 1024 | |
57 | #endif | |
58 | ||
59 | /* When doing file read/writes, do this many bytes at a time. */ | |
60 | #define FILE_XFR_SIZE 4096 | |
61 | ||
62 | /* FIXME: for now, need to consider target word size. */ | |
63 | #define TWORD long | |
64 | #define TADDR unsigned long | |
65 | ||
027e2a04 HPN |
66 | /* Path to be prepended to syscalls with absolute paths, and to be |
67 | chdir:ed at startup, if not empty. */ | |
68 | char *simulator_sysroot = ""; | |
69 | ||
c906108c SS |
70 | /* Utility of cb_syscall to fetch a path name or other string from the target. |
71 | The result is 0 for success or a host errno value. */ | |
72 | ||
71712327 | 73 | int |
1a8a700e MF |
74 | cb_get_string (host_callback *cb, CB_SYSCALL *sc, char *buf, int buflen, |
75 | TADDR addr) | |
c906108c SS |
76 | { |
77 | char *p, *pend; | |
78 | ||
79 | for (p = buf, pend = buf + buflen; p < pend; ++p, ++addr) | |
80 | { | |
81 | /* No, it isn't expected that this would cause one transaction with | |
82 | the remote target for each byte. The target could send the | |
83 | path name along with the syscall request, and cache the file | |
84 | name somewhere (or otherwise tweak this as desired). */ | |
85 | unsigned int count = (*sc->read_mem) (cb, sc, addr, p, 1); | |
028f6515 | 86 | |
c906108c SS |
87 | if (count != 1) |
88 | return EINVAL; | |
89 | if (*p == 0) | |
90 | break; | |
91 | } | |
92 | if (p == pend) | |
93 | return ENAMETOOLONG; | |
94 | return 0; | |
95 | } | |
96 | ||
97 | /* Utility of cb_syscall to fetch a path name. | |
98 | The buffer is malloc'd and the address is stored in BUFP. | |
027e2a04 HPN |
99 | The result is that of get_string, but prepended with |
100 | simulator_sysroot if the string starts with '/'. | |
c906108c SS |
101 | If an error occurs, no buffer is left malloc'd. */ |
102 | ||
103 | static int | |
1a8a700e | 104 | get_path (host_callback *cb, CB_SYSCALL *sc, TADDR addr, char **bufp) |
c906108c SS |
105 | { |
106 | char *buf = xmalloc (MAX_PATH_LEN); | |
107 | int result; | |
027e2a04 | 108 | int sysroot_len = strlen (simulator_sysroot); |
c906108c | 109 | |
71712327 | 110 | result = cb_get_string (cb, sc, buf, MAX_PATH_LEN - sysroot_len, addr); |
c906108c | 111 | if (result == 0) |
027e2a04 HPN |
112 | { |
113 | /* Prepend absolute paths with simulator_sysroot. Relative paths | |
114 | are supposed to be relative to a chdir within that path, but at | |
115 | this point unknown where. */ | |
116 | if (simulator_sysroot[0] != '\0' && *buf == '/') | |
117 | { | |
118 | /* Considering expected rareness of syscalls with absolute | |
119 | file paths (compared to relative file paths and insn | |
120 | execution), it does not seem worthwhile to rearrange things | |
121 | to get rid of the string moves here; we'd need at least an | |
122 | extra call to check the initial '/' in the path. */ | |
123 | memmove (buf + sysroot_len, buf, sysroot_len); | |
124 | memcpy (buf, simulator_sysroot, sysroot_len); | |
125 | } | |
126 | ||
127 | *bufp = buf; | |
128 | } | |
c906108c SS |
129 | else |
130 | free (buf); | |
131 | return result; | |
132 | } | |
133 | ||
134 | /* Perform a system call on behalf of the target. */ | |
135 | ||
136 | CB_RC | |
1a8a700e | 137 | cb_syscall (host_callback *cb, CB_SYSCALL *sc) |
c906108c SS |
138 | { |
139 | TWORD result = 0, errcode = 0; | |
140 | ||
141 | if (sc->magic != CB_SYSCALL_MAGIC) | |
142 | abort (); | |
143 | ||
144 | switch (cb_target_to_host_syscall (cb, sc->func)) | |
145 | { | |
85588c9a MF |
146 | case CB_SYS_argc: |
147 | result = countargv (cb->argv); | |
148 | break; | |
149 | ||
150 | case CB_SYS_argnlen: | |
151 | { | |
152 | if (sc->arg1 >= 0 && sc->arg1 < countargv (cb->argv)) | |
153 | result = strlen (cb->argv[sc->arg1]); | |
154 | else | |
155 | { | |
156 | result = -1; | |
157 | errcode = EINVAL; | |
158 | } | |
159 | } | |
160 | break; | |
161 | ||
162 | case CB_SYS_argn: | |
163 | { | |
164 | if (sc->arg1 >= 0 && sc->arg1 < countargv (cb->argv)) | |
165 | { | |
166 | const char *argn = cb->argv[sc->arg1]; | |
167 | int len = strlen (argn); | |
168 | int written = sc->write_mem (cb, sc, sc->arg2, argn, len + 1); | |
169 | ||
170 | if (written == len + 1) | |
171 | result = sc->arg2; | |
172 | else | |
173 | { | |
174 | result = -1; | |
175 | errcode = EINVAL; | |
176 | } | |
177 | } | |
178 | else | |
179 | { | |
180 | result = -1; | |
181 | errcode = EINVAL; | |
182 | } | |
183 | } | |
184 | break; | |
185 | ||
c906108c SS |
186 | case CB_SYS_argvlen : |
187 | { | |
188 | /* Compute how much space is required to store the argv,envp | |
189 | strings so that the program can allocate the space and then | |
190 | call SYS_argv to fetch the values. */ | |
fab6939b MF |
191 | int argc, envc, arglen, envlen; |
192 | char **argv = cb->argv; | |
193 | char **envp = cb->envp; | |
c906108c SS |
194 | |
195 | argc = arglen = 0; | |
196 | if (argv) | |
197 | { | |
198 | for ( ; argv[argc]; ++argc) | |
199 | arglen += strlen (argv[argc]) + 1; | |
200 | } | |
201 | envc = envlen = 0; | |
202 | if (envp) | |
203 | { | |
204 | for ( ; envp[envc]; ++envc) | |
205 | envlen += strlen (envp[envc]) + 1; | |
206 | } | |
fab6939b | 207 | result = arglen + 1 + envlen + 1; |
c906108c SS |
208 | break; |
209 | } | |
210 | ||
211 | case CB_SYS_argv : | |
212 | { | |
213 | /* Pointer to target's buffer. */ | |
214 | TADDR tbuf = sc->arg1; | |
215 | /* Buffer size. */ | |
216 | int bufsize = sc->arg2; | |
fab6939b | 217 | int written = 0; |
c906108c SS |
218 | /* Q is the target address of where all the strings go. */ |
219 | TADDR q; | |
fab6939b MF |
220 | int i, argc, envc, len, ret; |
221 | char **argv = cb->argv; | |
222 | char **envp = cb->envp; | |
223 | ||
224 | result = -1; | |
c906108c SS |
225 | |
226 | argc = 0; | |
227 | if (argv) | |
228 | { | |
229 | for ( ; argv[argc]; ++argc) | |
230 | { | |
fab6939b MF |
231 | len = strlen (argv[argc]) + 1; |
232 | if (written + len > bufsize) | |
233 | goto efault; | |
234 | ||
235 | ret = (*sc->write_mem) (cb, sc, tbuf + written, argv[argc], | |
236 | len); | |
237 | if (ret != len) | |
238 | goto einval; | |
239 | ||
240 | written += ret; | |
c906108c SS |
241 | } |
242 | } | |
fab6939b MF |
243 | /* Double NUL bytes indicates end of strings. */ |
244 | if (written >= bufsize) | |
245 | goto efault; | |
246 | if ((*sc->write_mem) (cb, sc, tbuf + written, "", 1) != 1) | |
247 | goto einval; | |
248 | ++written; | |
249 | ||
c906108c SS |
250 | envc = 0; |
251 | if (envp) | |
252 | { | |
253 | for ( ; envp[envc]; ++envc) | |
254 | { | |
fab6939b MF |
255 | len = strlen (envp[envc]) + 1; |
256 | if (written + len > bufsize) | |
257 | goto efault; | |
258 | ||
259 | ret = (*sc->write_mem) (cb, sc, tbuf + written, envp[envc], | |
260 | len); | |
261 | if (ret != len) | |
262 | goto einval; | |
263 | written += ret; | |
c906108c SS |
264 | } |
265 | } | |
fab6939b MF |
266 | /* Double NUL bytes indicates end of strings. */ |
267 | if (written >= bufsize) | |
268 | goto efault; | |
269 | if ((*sc->write_mem) (cb, sc, tbuf + written, "", 1) != 1) | |
270 | goto einval; | |
271 | ||
c906108c SS |
272 | result = argc; |
273 | sc->result2 = envc; | |
274 | break; | |
fab6939b MF |
275 | |
276 | efault: | |
277 | errcode = EFAULT; | |
278 | goto FinishSyscall; | |
279 | ||
280 | einval: | |
281 | errcode = EINVAL; | |
282 | goto FinishSyscall; | |
c906108c | 283 | } |
c906108c SS |
284 | |
285 | case CB_SYS_exit : | |
7d5c6c43 | 286 | /* Caller must catch and handle; see sim_syscall as an example. */ |
c906108c SS |
287 | break; |
288 | ||
289 | case CB_SYS_open : | |
290 | { | |
291 | char *path; | |
292 | ||
293 | errcode = get_path (cb, sc, sc->arg1, &path); | |
294 | if (errcode != 0) | |
295 | { | |
296 | result = -1; | |
297 | goto FinishSyscall; | |
298 | } | |
299 | result = (*cb->open) (cb, path, sc->arg2 /*, sc->arg3*/); | |
300 | free (path); | |
301 | if (result < 0) | |
302 | goto ErrorFinish; | |
303 | } | |
304 | break; | |
305 | ||
306 | case CB_SYS_close : | |
307 | result = (*cb->close) (cb, sc->arg1); | |
308 | if (result < 0) | |
309 | goto ErrorFinish; | |
310 | break; | |
311 | ||
312 | case CB_SYS_read : | |
313 | { | |
314 | /* ??? Perfect handling of error conditions may require only one | |
315 | call to cb->read. One can't assume all the data is | |
316 | contiguously stored in host memory so that would require | |
317 | malloc'ing/free'ing the space. Maybe later. */ | |
318 | char buf[FILE_XFR_SIZE]; | |
319 | int fd = sc->arg1; | |
320 | TADDR addr = sc->arg2; | |
321 | size_t count = sc->arg3; | |
322 | size_t bytes_read = 0; | |
323 | int bytes_written; | |
324 | ||
325 | while (count > 0) | |
326 | { | |
b981d709 | 327 | if (cb_is_stdin (cb, fd)) |
c906108c SS |
328 | result = (int) (*cb->read_stdin) (cb, buf, |
329 | (count < FILE_XFR_SIZE | |
330 | ? count : FILE_XFR_SIZE)); | |
331 | else | |
332 | result = (int) (*cb->read) (cb, fd, buf, | |
333 | (count < FILE_XFR_SIZE | |
334 | ? count : FILE_XFR_SIZE)); | |
335 | if (result == -1) | |
336 | goto ErrorFinish; | |
337 | if (result == 0) /* EOF */ | |
338 | break; | |
339 | bytes_written = (*sc->write_mem) (cb, sc, addr, buf, result); | |
340 | if (bytes_written != result) | |
341 | { | |
342 | result = -1; | |
343 | errcode = EINVAL; | |
344 | goto FinishSyscall; | |
345 | } | |
346 | bytes_read += result; | |
347 | count -= result; | |
348 | addr += result; | |
349 | /* If this is a short read, don't go back for more */ | |
350 | if (result != FILE_XFR_SIZE) | |
351 | break; | |
352 | } | |
353 | result = bytes_read; | |
354 | } | |
355 | break; | |
356 | ||
357 | case CB_SYS_write : | |
358 | { | |
359 | /* ??? Perfect handling of error conditions may require only one | |
360 | call to cb->write. One can't assume all the data is | |
361 | contiguously stored in host memory so that would require | |
362 | malloc'ing/free'ing the space. Maybe later. */ | |
363 | char buf[FILE_XFR_SIZE]; | |
364 | int fd = sc->arg1; | |
365 | TADDR addr = sc->arg2; | |
366 | size_t count = sc->arg3; | |
367 | int bytes_read; | |
368 | size_t bytes_written = 0; | |
369 | ||
370 | while (count > 0) | |
371 | { | |
372 | int bytes_to_read = count < FILE_XFR_SIZE ? count : FILE_XFR_SIZE; | |
373 | bytes_read = (*sc->read_mem) (cb, sc, addr, buf, bytes_to_read); | |
374 | if (bytes_read != bytes_to_read) | |
375 | { | |
376 | result = -1; | |
377 | errcode = EINVAL; | |
378 | goto FinishSyscall; | |
379 | } | |
34b47c38 | 380 | if (cb_is_stdout (cb, fd)) |
c906108c SS |
381 | { |
382 | result = (int) (*cb->write_stdout) (cb, buf, bytes_read); | |
383 | (*cb->flush_stdout) (cb); | |
384 | } | |
34b47c38 | 385 | else if (cb_is_stderr (cb, fd)) |
c906108c SS |
386 | { |
387 | result = (int) (*cb->write_stderr) (cb, buf, bytes_read); | |
388 | (*cb->flush_stderr) (cb); | |
389 | } | |
390 | else | |
391 | result = (int) (*cb->write) (cb, fd, buf, bytes_read); | |
392 | if (result == -1) | |
393 | goto ErrorFinish; | |
394 | bytes_written += result; | |
395 | count -= result; | |
396 | addr += result; | |
397 | } | |
398 | result = bytes_written; | |
399 | } | |
400 | break; | |
401 | ||
402 | case CB_SYS_lseek : | |
403 | { | |
404 | int fd = sc->arg1; | |
405 | unsigned long offset = sc->arg2; | |
406 | int whence = sc->arg3; | |
407 | ||
408 | result = (*cb->lseek) (cb, fd, offset, whence); | |
409 | if (result < 0) | |
410 | goto ErrorFinish; | |
411 | } | |
412 | break; | |
413 | ||
414 | case CB_SYS_unlink : | |
415 | { | |
416 | char *path; | |
417 | ||
418 | errcode = get_path (cb, sc, sc->arg1, &path); | |
419 | if (errcode != 0) | |
420 | { | |
421 | result = -1; | |
422 | goto FinishSyscall; | |
423 | } | |
424 | result = (*cb->unlink) (cb, path); | |
425 | free (path); | |
426 | if (result < 0) | |
427 | goto ErrorFinish; | |
428 | } | |
429 | break; | |
430 | ||
5d945fec HPN |
431 | case CB_SYS_truncate : |
432 | { | |
433 | char *path; | |
434 | long len = sc->arg2; | |
435 | ||
436 | errcode = get_path (cb, sc, sc->arg1, &path); | |
437 | if (errcode != 0) | |
438 | { | |
439 | result = -1; | |
440 | errcode = EFAULT; | |
441 | goto FinishSyscall; | |
442 | } | |
443 | result = (*cb->truncate) (cb, path, len); | |
444 | free (path); | |
445 | if (result < 0) | |
446 | goto ErrorFinish; | |
447 | } | |
448 | break; | |
449 | ||
450 | case CB_SYS_ftruncate : | |
451 | { | |
452 | int fd = sc->arg1; | |
453 | long len = sc->arg2; | |
454 | ||
455 | result = (*cb->ftruncate) (cb, fd, len); | |
456 | if (result < 0) | |
457 | goto ErrorFinish; | |
458 | } | |
459 | break; | |
460 | ||
82571856 HPN |
461 | case CB_SYS_rename : |
462 | { | |
463 | char *path1, *path2; | |
464 | ||
465 | errcode = get_path (cb, sc, sc->arg1, &path1); | |
466 | if (errcode != 0) | |
467 | { | |
468 | result = -1; | |
469 | errcode = EFAULT; | |
470 | goto FinishSyscall; | |
471 | } | |
472 | errcode = get_path (cb, sc, sc->arg2, &path2); | |
473 | if (errcode != 0) | |
474 | { | |
475 | result = -1; | |
476 | errcode = EFAULT; | |
477 | free (path1); | |
478 | goto FinishSyscall; | |
479 | } | |
480 | result = (*cb->rename) (cb, path1, path2); | |
481 | free (path1); | |
482 | free (path2); | |
483 | if (result < 0) | |
484 | goto ErrorFinish; | |
485 | } | |
486 | break; | |
487 | ||
c906108c SS |
488 | case CB_SYS_stat : |
489 | { | |
490 | char *path,*buf; | |
491 | int buflen; | |
492 | struct stat statbuf; | |
493 | TADDR addr = sc->arg2; | |
494 | ||
495 | errcode = get_path (cb, sc, sc->arg1, &path); | |
496 | if (errcode != 0) | |
497 | { | |
498 | result = -1; | |
499 | goto FinishSyscall; | |
500 | } | |
2d7bb758 | 501 | result = (*cb->to_stat) (cb, path, &statbuf); |
c906108c SS |
502 | free (path); |
503 | if (result < 0) | |
504 | goto ErrorFinish; | |
505 | buflen = cb_host_to_target_stat (cb, NULL, NULL); | |
506 | buf = xmalloc (buflen); | |
507 | if (cb_host_to_target_stat (cb, &statbuf, buf) != buflen) | |
508 | { | |
509 | /* The translation failed. This is due to an internal | |
510 | host program error, not the target's fault. */ | |
511 | free (buf); | |
512 | errcode = ENOSYS; | |
513 | result = -1; | |
514 | goto FinishSyscall; | |
515 | } | |
516 | if ((*sc->write_mem) (cb, sc, addr, buf, buflen) != buflen) | |
517 | { | |
518 | free (buf); | |
519 | errcode = EINVAL; | |
520 | result = -1; | |
521 | goto FinishSyscall; | |
522 | } | |
523 | free (buf); | |
524 | } | |
525 | break; | |
526 | ||
527 | case CB_SYS_fstat : | |
528 | { | |
529 | char *buf; | |
530 | int buflen; | |
531 | struct stat statbuf; | |
532 | TADDR addr = sc->arg2; | |
533 | ||
2d7bb758 | 534 | result = (*cb->to_fstat) (cb, sc->arg1, &statbuf); |
c906108c SS |
535 | if (result < 0) |
536 | goto ErrorFinish; | |
537 | buflen = cb_host_to_target_stat (cb, NULL, NULL); | |
538 | buf = xmalloc (buflen); | |
539 | if (cb_host_to_target_stat (cb, &statbuf, buf) != buflen) | |
540 | { | |
541 | /* The translation failed. This is due to an internal | |
542 | host program error, not the target's fault. */ | |
543 | free (buf); | |
544 | errcode = ENOSYS; | |
545 | result = -1; | |
546 | goto FinishSyscall; | |
547 | } | |
548 | if ((*sc->write_mem) (cb, sc, addr, buf, buflen) != buflen) | |
549 | { | |
550 | free (buf); | |
551 | errcode = EINVAL; | |
552 | result = -1; | |
553 | goto FinishSyscall; | |
554 | } | |
555 | free (buf); | |
556 | } | |
557 | break; | |
558 | ||
0d3cd463 HPN |
559 | case CB_SYS_lstat : |
560 | { | |
561 | char *path, *buf; | |
562 | int buflen; | |
563 | struct stat statbuf; | |
564 | TADDR addr = sc->arg2; | |
565 | ||
566 | errcode = get_path (cb, sc, sc->arg1, &path); | |
567 | if (errcode != 0) | |
568 | { | |
569 | result = -1; | |
570 | goto FinishSyscall; | |
571 | } | |
2d7bb758 | 572 | result = (*cb->to_lstat) (cb, path, &statbuf); |
0d3cd463 HPN |
573 | free (path); |
574 | if (result < 0) | |
575 | goto ErrorFinish; | |
576 | ||
577 | buflen = cb_host_to_target_stat (cb, NULL, NULL); | |
578 | buf = xmalloc (buflen); | |
579 | if (cb_host_to_target_stat (cb, &statbuf, buf) != buflen) | |
580 | { | |
581 | /* The translation failed. This is due to an internal | |
582 | host program error, not the target's fault. | |
583 | Unfortunately, it's hard to test this case, so there's no | |
584 | test-case for this execution path. */ | |
585 | free (buf); | |
586 | errcode = ENOSYS; | |
587 | result = -1; | |
588 | goto FinishSyscall; | |
589 | } | |
590 | ||
591 | if ((*sc->write_mem) (cb, sc, addr, buf, buflen) != buflen) | |
592 | { | |
593 | free (buf); | |
594 | errcode = EINVAL; | |
595 | result = -1; | |
596 | goto FinishSyscall; | |
597 | } | |
598 | ||
599 | free (buf); | |
600 | } | |
601 | break; | |
602 | ||
97f669ed HPN |
603 | case CB_SYS_pipe : |
604 | { | |
605 | int p[2]; | |
606 | char *target_p = xcalloc (1, cb->target_sizeof_int * 2); | |
607 | ||
608 | result = (*cb->pipe) (cb, p); | |
609 | if (result != 0) | |
610 | goto ErrorFinish; | |
611 | ||
612 | cb_store_target_endian (cb, target_p, cb->target_sizeof_int, p[0]); | |
613 | cb_store_target_endian (cb, target_p + cb->target_sizeof_int, | |
614 | cb->target_sizeof_int, p[1]); | |
615 | if ((*sc->write_mem) (cb, sc, sc->arg1, target_p, | |
616 | cb->target_sizeof_int * 2) | |
617 | != cb->target_sizeof_int * 2) | |
618 | { | |
619 | /* Close the pipe fd:s. */ | |
620 | (*cb->close) (cb, p[0]); | |
621 | (*cb->close) (cb, p[1]); | |
622 | errcode = EFAULT; | |
623 | result = -1; | |
624 | } | |
625 | ||
626 | free (target_p); | |
627 | } | |
628 | break; | |
629 | ||
7da5cf78 | 630 | case CB_SYS_getpid: |
c45cffdb MF |
631 | /* POSIX says getpid always succeeds. */ |
632 | result = (*cb->getpid) (cb); | |
7da5cf78 MF |
633 | break; |
634 | ||
d394a6ef MF |
635 | case CB_SYS_kill: |
636 | /* If killing self, leave it to the caller to process so it can send the | |
637 | signal to the engine. */ | |
638 | if (sc->arg1 == (*cb->getpid) (cb)) | |
639 | { | |
640 | result = -1; | |
641 | errcode = ENOSYS; | |
642 | } | |
643 | else | |
644 | { | |
645 | int signum = cb_target_to_host_signal (cb, sc->arg2); | |
646 | ||
647 | result = (*cb->kill) (cb, sc->arg1, signum); | |
648 | cb->last_errno = errno; | |
649 | goto ErrorFinish; | |
650 | } | |
651 | break; | |
652 | ||
c906108c SS |
653 | case CB_SYS_time : |
654 | { | |
655 | /* FIXME: May wish to change CB_SYS_time to something else. | |
656 | We might also want gettimeofday or times, but if system calls | |
657 | can be built on others, we can keep the number we have to support | |
658 | here down. */ | |
00330cd1 | 659 | time_t t = (*cb->time) (cb); |
c906108c SS |
660 | result = t; |
661 | /* It is up to target code to process the argument to time(). */ | |
662 | } | |
663 | break; | |
664 | ||
665 | case CB_SYS_chdir : | |
666 | case CB_SYS_chmod : | |
667 | case CB_SYS_utime : | |
668 | /* fall through for now */ | |
669 | ||
670 | default : | |
671 | result = -1; | |
672 | errcode = ENOSYS; | |
673 | break; | |
674 | } | |
675 | ||
676 | FinishSyscall: | |
677 | sc->result = result; | |
678 | if (errcode == 0) | |
679 | sc->errcode = 0; | |
680 | else | |
681 | sc->errcode = cb_host_to_target_errno (cb, errcode); | |
682 | return CB_RC_OK; | |
683 | ||
684 | ErrorFinish: | |
685 | sc->result = result; | |
686 | sc->errcode = (*cb->get_errno) (cb); | |
687 | return CB_RC_OK; | |
688 | } |