fd7f9bc7ae29e7638aa28f2f076f57ab92dc6090
[deliverable/binutils-gdb.git] / sim / cris / traps.c
1 /* CRIS exception, interrupt, and trap (EIT) support
2 Copyright (C) 2004-2021 Free Software Foundation, Inc.
3 Contributed by Axis Communications.
4
5 This file is part of the GNU simulators.
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
9 the Free Software Foundation; either version 3 of the License, or
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
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19
20 /* This must come before any other includes. */
21 #include "defs.h"
22
23 #include "portability.h"
24 #include "sim-main.h"
25 #include "sim-syscall.h"
26 #include "sim-options.h"
27 #include "sim-signal.h"
28 #include "sim/callback.h"
29 #include "bfd.h"
30 /* FIXME: get rid of targ-vals.h usage everywhere else. */
31
32 #include <stdlib.h>
33 #include <stdarg.h>
34 #include <errno.h>
35 #ifdef HAVE_UNISTD_H
36 #include <unistd.h>
37 #endif
38 #ifdef HAVE_FCNTL_H
39 #include <fcntl.h>
40 #endif
41 #ifdef HAVE_SYS_PARAM_H
42 #include <sys/param.h>
43 #endif
44 #ifdef HAVE_SYS_STAT_H
45 #include <sys/stat.h>
46 #endif
47 /* For PATH_MAX, originally. */
48 #ifdef HAVE_LIMITS_H
49 #include <limits.h>
50 #endif
51
52 /* From ld/sysdep.h. */
53 #ifdef PATH_MAX
54 # define SIM_PATHMAX PATH_MAX
55 #else
56 # ifdef MAXPATHLEN
57 # define SIM_PATHMAX MAXPATHLEN
58 # else
59 # define SIM_PATHMAX 1024
60 # endif
61 #endif
62
63 /* The verbatim values are from asm-cris/unistd.h. */
64
65 #define TARGET_SYS_exit 1
66 #define TARGET_SYS_read 3
67 #define TARGET_SYS_write 4
68 #define TARGET_SYS_open 5
69 #define TARGET_SYS_close 6
70 #define TARGET_SYS_unlink 10
71 #define TARGET_SYS_time 13
72 #define TARGET_SYS_lseek 19
73 #define TARGET_SYS_getpid 20
74 #define TARGET_SYS_access 33
75 #define TARGET_SYS_kill 37
76 #define TARGET_SYS_rename 38
77 #define TARGET_SYS_pipe 42
78 #define TARGET_SYS_brk 45
79 #define TARGET_SYS_ioctl 54
80 #define TARGET_SYS_fcntl 55
81 #define TARGET_SYS_getppid 64
82 #define TARGET_SYS_setrlimit 75
83 #define TARGET_SYS_gettimeofday 78
84 #define TARGET_SYS_readlink 85
85 #define TARGET_SYS_munmap 91
86 #define TARGET_SYS_truncate 92
87 #define TARGET_SYS_ftruncate 93
88 #define TARGET_SYS_socketcall 102
89 #define TARGET_SYS_stat 106
90 #define TARGET_SYS_fstat 108
91 #define TARGET_SYS_wait4 114
92 #define TARGET_SYS_sigreturn 119
93 #define TARGET_SYS_clone 120
94 #define TARGET_SYS_uname 122
95 #define TARGET_SYS_mprotect 125
96 #define TARGET_SYS_llseek 140
97 #define TARGET_SYS_writev 146
98 #define TARGET_SYS__sysctl 149
99 #define TARGET_SYS_sched_setparam 154
100 #define TARGET_SYS_sched_getparam 155
101 #define TARGET_SYS_sched_setscheduler 156
102 #define TARGET_SYS_sched_getscheduler 157
103 #define TARGET_SYS_sched_yield 158
104 #define TARGET_SYS_sched_get_priority_max 159
105 #define TARGET_SYS_sched_get_priority_min 160
106 #define TARGET_SYS_mremap 163
107 #define TARGET_SYS_poll 168
108 #define TARGET_SYS_rt_sigaction 174
109 #define TARGET_SYS_rt_sigprocmask 175
110 #define TARGET_SYS_rt_sigsuspend 179
111 #define TARGET_SYS_getcwd 183
112 #define TARGET_SYS_ugetrlimit 191
113 #define TARGET_SYS_mmap2 192
114 #define TARGET_SYS_stat64 195
115 #define TARGET_SYS_lstat64 196
116 #define TARGET_SYS_fstat64 197
117 #define TARGET_SYS_geteuid32 201
118 #define TARGET_SYS_getuid32 199
119 #define TARGET_SYS_getegid32 202
120 #define TARGET_SYS_getgid32 200
121 #define TARGET_SYS_fcntl64 221
122 #define TARGET_SYS_set_thread_area 243
123 #define TARGET_SYS_exit_group 252
124
125 #define TARGET_PROT_READ 0x1
126 #define TARGET_PROT_WRITE 0x2
127 #define TARGET_PROT_EXEC 0x4
128 #define TARGET_PROT_NONE 0x0
129
130 #define TARGET_MAP_SHARED 0x01
131 #define TARGET_MAP_PRIVATE 0x02
132 #define TARGET_MAP_TYPE 0x0f
133 #define TARGET_MAP_FIXED 0x10
134 #define TARGET_MAP_ANONYMOUS 0x20
135 #define TARGET_MAP_DENYWRITE 0x800
136
137 #define TARGET_CTL_KERN 1
138 #define TARGET_CTL_VM 2
139 #define TARGET_CTL_NET 3
140 #define TARGET_CTL_PROC 4
141 #define TARGET_CTL_FS 5
142 #define TARGET_CTL_DEBUG 6
143 #define TARGET_CTL_DEV 7
144 #define TARGET_CTL_BUS 8
145 #define TARGET_CTL_ABI 9
146
147 #define TARGET_CTL_KERN_VERSION 4
148
149 /* linux/mman.h */
150 #define TARGET_MREMAP_MAYMOVE 1
151 #define TARGET_MREMAP_FIXED 2
152
153 #define TARGET_TCGETS 0x5401
154
155 #define TARGET_UTSNAME "#7 Thu Jan 1 00:00:00 MET 2009"
156
157 /* Seconds since 1970-01-01 to the above date + 10 minutes;
158 'date -d "Thu Jan 1 00:00:10 MET 2009" +%s'. */
159 #define TARGET_EPOCH 1230764410
160
161 /* Milliseconds since start of run. We use the number of syscalls to
162 avoid introducing noise in the execution time. */
163 #define TARGET_TIME_MS(cpu) ((cpu)->syscalls)
164
165 /* Seconds as in time(2). */
166 #define TARGET_TIME(cpu) (TARGET_EPOCH + TARGET_TIME_MS (cpu) / 1000)
167
168 #define TARGET_SCHED_OTHER 0
169
170 #define TARGET_RLIMIT_STACK 3
171 #define TARGET_RLIMIT_NOFILE 7
172
173 #define SIM_TARGET_MAX_THREADS 64
174 #define SIM_MAX_ALLOC_CHUNK (512*1024*1024)
175
176 /* From linux/sched.h. */
177 #define TARGET_CSIGNAL 0x000000ff
178 #define TARGET_CLONE_VM 0x00000100
179 #define TARGET_CLONE_FS 0x00000200
180 #define TARGET_CLONE_FILES 0x00000400
181 #define TARGET_CLONE_SIGHAND 0x00000800
182 #define TARGET_CLONE_PID 0x00001000
183 #define TARGET_CLONE_PTRACE 0x00002000
184 #define TARGET_CLONE_VFORK 0x00004000
185 #define TARGET_CLONE_PARENT 0x00008000
186 #define TARGET_CLONE_THREAD 0x00010000
187 #define TARGET_CLONE_SIGNAL (TARGET_CLONE_SIGHAND | TARGET_CLONE_THREAD)
188
189 /* From asm-cris/poll.h. */
190 #define TARGET_POLLIN 1
191
192 /* From asm-cris/signal.h. */
193 #define TARGET_SIG_BLOCK 0
194 #define TARGET_SIG_UNBLOCK 1
195 #define TARGET_SIG_SETMASK 2
196
197 #define TARGET_SIG_DFL 0
198 #define TARGET_SIG_IGN 1
199 #define TARGET_SIG_ERR ((USI)-1)
200
201 #define TARGET_SIGHUP 1
202 #define TARGET_SIGINT 2
203 #define TARGET_SIGQUIT 3
204 #define TARGET_SIGILL 4
205 #define TARGET_SIGTRAP 5
206 #define TARGET_SIGABRT 6
207 #define TARGET_SIGIOT 6
208 #define TARGET_SIGBUS 7
209 #define TARGET_SIGFPE 8
210 #define TARGET_SIGKILL 9
211 #define TARGET_SIGUSR1 10
212 #define TARGET_SIGSEGV 11
213 #define TARGET_SIGUSR2 12
214 #define TARGET_SIGPIPE 13
215 #define TARGET_SIGALRM 14
216 #define TARGET_SIGTERM 15
217 #define TARGET_SIGSTKFLT 16
218 #define TARGET_SIGCHLD 17
219 #define TARGET_SIGCONT 18
220 #define TARGET_SIGSTOP 19
221 #define TARGET_SIGTSTP 20
222 #define TARGET_SIGTTIN 21
223 #define TARGET_SIGTTOU 22
224 #define TARGET_SIGURG 23
225 #define TARGET_SIGXCPU 24
226 #define TARGET_SIGXFSZ 25
227 #define TARGET_SIGVTALRM 26
228 #define TARGET_SIGPROF 27
229 #define TARGET_SIGWINCH 28
230 #define TARGET_SIGIO 29
231 #define TARGET_SIGPOLL SIGIO
232 /* Actually commented out in the kernel header. */
233 #define TARGET_SIGLOST 29
234 #define TARGET_SIGPWR 30
235 #define TARGET_SIGSYS 31
236
237 /* From include/asm-cris/signal.h. */
238 #define TARGET_SA_NOCLDSTOP 0x00000001
239 #define TARGET_SA_NOCLDWAIT 0x00000002 /* not supported yet */
240 #define TARGET_SA_SIGINFO 0x00000004
241 #define TARGET_SA_ONSTACK 0x08000000
242 #define TARGET_SA_RESTART 0x10000000
243 #define TARGET_SA_NODEFER 0x40000000
244 #define TARGET_SA_RESETHAND 0x80000000
245 #define TARGET_SA_INTERRUPT 0x20000000 /* dummy -- ignored */
246 #define TARGET_SA_RESTORER 0x04000000
247
248 /* From linux/wait.h. */
249 #define TARGET_WNOHANG 1
250 #define TARGET_WUNTRACED 2
251 #define TARGET___WNOTHREAD 0x20000000
252 #define TARGET___WALL 0x40000000
253 #define TARGET___WCLONE 0x80000000
254
255 /* From linux/limits.h. */
256 #define TARGET_PIPE_BUF 4096
257
258 /* From unistd.h. */
259 #define TARGET_R_OK 4
260 #define TARGET_W_OK 2
261 #define TARGET_X_OK 1
262 #define TARGET_F_OK 0
263
264 static const char stat_map[] =
265 "st_dev,2:space,10:space,4:st_mode,4:st_nlink,4:st_uid,4"
266 ":st_gid,4:st_rdev,2:space,10:st_size,8:st_blksize,4:st_blocks,4"
267 ":space,4:st_atime,4:space,4:st_mtime,4:space,4:st_ctime,4:space,4"
268 ":st_ino,8";
269
270 static const CB_TARGET_DEFS_MAP syscall_map[] =
271 {
272 { "open", CB_SYS_open, TARGET_SYS_open },
273 { "close", CB_SYS_close, TARGET_SYS_close },
274 { "read", CB_SYS_read, TARGET_SYS_read },
275 { "write", CB_SYS_write, TARGET_SYS_write },
276 { "lseek", CB_SYS_lseek, TARGET_SYS_lseek },
277 { "unlink", CB_SYS_unlink, TARGET_SYS_unlink },
278 { "getpid", CB_SYS_getpid, TARGET_SYS_getpid },
279 { "fstat", CB_SYS_fstat, TARGET_SYS_fstat64 },
280 { "lstat", CB_SYS_lstat, TARGET_SYS_lstat64 },
281 { "stat", CB_SYS_stat, TARGET_SYS_stat64 },
282 { "pipe", CB_SYS_pipe, TARGET_SYS_pipe },
283 { "rename", CB_SYS_rename, TARGET_SYS_rename },
284 { "truncate", CB_SYS_truncate, TARGET_SYS_truncate },
285 { "ftruncate", CB_SYS_ftruncate, TARGET_SYS_ftruncate },
286 { 0, -1, -1 }
287 };
288
289 /* An older, 32-bit-only stat mapping. */
290 static const char stat32_map[] =
291 "st_dev,2:space,2:st_ino,4:st_mode,2:st_nlink,2:st_uid,2"
292 ":st_gid,2:st_rdev,2:space,2:st_size,4:st_blksize,4:st_blocks,4"
293 ":st_atime,4:space,4:st_mtime,4:space,4:st_ctime,4:space,12";
294
295 /* Map for calls using the 32-bit struct stat. Primarily used by the
296 newlib Linux mapping. */
297 static const CB_TARGET_DEFS_MAP syscall_stat32_map[] =
298 {
299 { "fstat", CB_SYS_fstat, TARGET_SYS_fstat },
300 { "stat", CB_SYS_stat, TARGET_SYS_stat },
301 { 0, -1, -1 }
302 };
303
304 /* Giving the true value for the running sim process will lead to
305 non-time-invariant behavior. */
306 #define TARGET_PID 42
307
308 /* Unfortunately, we don't get this from cris.cpu at the moment, and if
309 we did, we'd still don't get a register number with the "16" offset. */
310 #define TARGET_SRP_REGNUM (16+11)
311
312 /* Extracted by applying
313 awk '/^#define/ { printf "#ifdef %s\n { %s, %s },\n#endif\n", $2, $2, $3;}'
314 on .../include/asm/errno.h in a GNU/Linux/CRIS installation and
315 adjusting the synonyms. */
316
317 static const CB_TARGET_DEFS_MAP errno_map[] =
318 {
319 #ifdef EPERM
320 { "EPERM", EPERM, 1 },
321 #endif
322 #ifdef ENOENT
323 { "ENOENT", ENOENT, 2 },
324 #endif
325 #ifdef ESRCH
326 { "ESRCH", ESRCH, 3 },
327 #endif
328 #ifdef EINTR
329 { "EINTR", EINTR, 4 },
330 #endif
331 #ifdef EIO
332 { "EIO", EIO, 5 },
333 #endif
334 #ifdef ENXIO
335 { "ENXIO", ENXIO, 6 },
336 #endif
337 #ifdef E2BIG
338 { "E2BIG", E2BIG, 7 },
339 #endif
340 #ifdef ENOEXEC
341 { "ENOEXEC", ENOEXEC, 8 },
342 #endif
343 #ifdef EBADF
344 { "EBADF", EBADF, 9 },
345 #endif
346 #ifdef ECHILD
347 { "ECHILD", ECHILD, 10 },
348 #endif
349 #ifdef EAGAIN
350 { "EAGAIN", EAGAIN, 11 },
351 #endif
352 #ifdef ENOMEM
353 { "ENOMEM", ENOMEM, 12 },
354 #endif
355 #ifdef EACCES
356 { "EACCES", EACCES, 13 },
357 #endif
358 #ifdef EFAULT
359 { "EFAULT", EFAULT, 14 },
360 #endif
361 #ifdef ENOTBLK
362 { "ENOTBLK", ENOTBLK, 15 },
363 #endif
364 #ifdef EBUSY
365 { "EBUSY", EBUSY, 16 },
366 #endif
367 #ifdef EEXIST
368 { "EEXIST", EEXIST, 17 },
369 #endif
370 #ifdef EXDEV
371 { "EXDEV", EXDEV, 18 },
372 #endif
373 #ifdef ENODEV
374 { "ENODEV", ENODEV, 19 },
375 #endif
376 #ifdef ENOTDIR
377 { "ENOTDIR", ENOTDIR, 20 },
378 #endif
379 #ifdef EISDIR
380 { "EISDIR", EISDIR, 21 },
381 #endif
382 #ifdef EINVAL
383 { "EINVAL", EINVAL, 22 },
384 #endif
385 #ifdef ENFILE
386 { "ENFILE", ENFILE, 23 },
387 #endif
388 #ifdef EMFILE
389 { "EMFILE", EMFILE, 24 },
390 #endif
391 #ifdef ENOTTY
392 { "ENOTTY", ENOTTY, 25 },
393 #endif
394 #ifdef ETXTBSY
395 { "ETXTBSY", ETXTBSY, 26 },
396 #endif
397 #ifdef EFBIG
398 { "EFBIG", EFBIG, 27 },
399 #endif
400 #ifdef ENOSPC
401 { "ENOSPC", ENOSPC, 28 },
402 #endif
403 #ifdef ESPIPE
404 { "ESPIPE", ESPIPE, 29 },
405 #endif
406 #ifdef EROFS
407 { "EROFS", EROFS, 30 },
408 #endif
409 #ifdef EMLINK
410 { "EMLINK", EMLINK, 31 },
411 #endif
412 #ifdef EPIPE
413 { "EPIPE", EPIPE, 32 },
414 #endif
415 #ifdef EDOM
416 { "EDOM", EDOM, 33 },
417 #endif
418 #ifdef ERANGE
419 { "ERANGE", ERANGE, 34 },
420 #endif
421 #ifdef EDEADLK
422 { "EDEADLK", EDEADLK, 35 },
423 #endif
424 #ifdef ENAMETOOLONG
425 { "ENAMETOOLONG", ENAMETOOLONG, 36 },
426 #endif
427 #ifdef ENOLCK
428 { "ENOLCK", ENOLCK, 37 },
429 #endif
430 #ifdef ENOSYS
431 { "ENOSYS", ENOSYS, 38 },
432 #endif
433 #ifdef ENOTEMPTY
434 { "ENOTEMPTY", ENOTEMPTY, 39 },
435 #endif
436 #ifdef ELOOP
437 { "ELOOP", ELOOP, 40 },
438 #endif
439 #ifdef EWOULDBLOCK
440 { "EWOULDBLOCK", EWOULDBLOCK, 11 },
441 #endif
442 #ifdef ENOMSG
443 { "ENOMSG", ENOMSG, 42 },
444 #endif
445 #ifdef EIDRM
446 { "EIDRM", EIDRM, 43 },
447 #endif
448 #ifdef ECHRNG
449 { "ECHRNG", ECHRNG, 44 },
450 #endif
451 #ifdef EL2NSYNC
452 { "EL2NSYNC", EL2NSYNC, 45 },
453 #endif
454 #ifdef EL3HLT
455 { "EL3HLT", EL3HLT, 46 },
456 #endif
457 #ifdef EL3RST
458 { "EL3RST", EL3RST, 47 },
459 #endif
460 #ifdef ELNRNG
461 { "ELNRNG", ELNRNG, 48 },
462 #endif
463 #ifdef EUNATCH
464 { "EUNATCH", EUNATCH, 49 },
465 #endif
466 #ifdef ENOCSI
467 { "ENOCSI", ENOCSI, 50 },
468 #endif
469 #ifdef EL2HLT
470 { "EL2HLT", EL2HLT, 51 },
471 #endif
472 #ifdef EBADE
473 { "EBADE", EBADE, 52 },
474 #endif
475 #ifdef EBADR
476 { "EBADR", EBADR, 53 },
477 #endif
478 #ifdef EXFULL
479 { "EXFULL", EXFULL, 54 },
480 #endif
481 #ifdef ENOANO
482 { "ENOANO", ENOANO, 55 },
483 #endif
484 #ifdef EBADRQC
485 { "EBADRQC", EBADRQC, 56 },
486 #endif
487 #ifdef EBADSLT
488 { "EBADSLT", EBADSLT, 57 },
489 #endif
490 #ifdef EDEADLOCK
491 { "EDEADLOCK", EDEADLOCK, 35 },
492 #endif
493 #ifdef EBFONT
494 { "EBFONT", EBFONT, 59 },
495 #endif
496 #ifdef ENOSTR
497 { "ENOSTR", ENOSTR, 60 },
498 #endif
499 #ifdef ENODATA
500 { "ENODATA", ENODATA, 61 },
501 #endif
502 #ifdef ETIME
503 { "ETIME", ETIME, 62 },
504 #endif
505 #ifdef ENOSR
506 { "ENOSR", ENOSR, 63 },
507 #endif
508 #ifdef ENONET
509 { "ENONET", ENONET, 64 },
510 #endif
511 #ifdef ENOPKG
512 { "ENOPKG", ENOPKG, 65 },
513 #endif
514 #ifdef EREMOTE
515 { "EREMOTE", EREMOTE, 66 },
516 #endif
517 #ifdef ENOLINK
518 { "ENOLINK", ENOLINK, 67 },
519 #endif
520 #ifdef EADV
521 { "EADV", EADV, 68 },
522 #endif
523 #ifdef ESRMNT
524 { "ESRMNT", ESRMNT, 69 },
525 #endif
526 #ifdef ECOMM
527 { "ECOMM", ECOMM, 70 },
528 #endif
529 #ifdef EPROTO
530 { "EPROTO", EPROTO, 71 },
531 #endif
532 #ifdef EMULTIHOP
533 { "EMULTIHOP", EMULTIHOP, 72 },
534 #endif
535 #ifdef EDOTDOT
536 { "EDOTDOT", EDOTDOT, 73 },
537 #endif
538 #ifdef EBADMSG
539 { "EBADMSG", EBADMSG, 74 },
540 #endif
541 #ifdef EOVERFLOW
542 { "EOVERFLOW", EOVERFLOW, 75 },
543 #endif
544 #ifdef ENOTUNIQ
545 { "ENOTUNIQ", ENOTUNIQ, 76 },
546 #endif
547 #ifdef EBADFD
548 { "EBADFD", EBADFD, 77 },
549 #endif
550 #ifdef EREMCHG
551 { "EREMCHG", EREMCHG, 78 },
552 #endif
553 #ifdef ELIBACC
554 { "ELIBACC", ELIBACC, 79 },
555 #endif
556 #ifdef ELIBBAD
557 { "ELIBBAD", ELIBBAD, 80 },
558 #endif
559 #ifdef ELIBSCN
560 { "ELIBSCN", ELIBSCN, 81 },
561 #endif
562 #ifdef ELIBMAX
563 { "ELIBMAX", ELIBMAX, 82 },
564 #endif
565 #ifdef ELIBEXEC
566 { "ELIBEXEC", ELIBEXEC, 83 },
567 #endif
568 #ifdef EILSEQ
569 { "EILSEQ", EILSEQ, 84 },
570 #endif
571 #ifdef ERESTART
572 { "ERESTART", ERESTART, 85 },
573 #endif
574 #ifdef ESTRPIPE
575 { "ESTRPIPE", ESTRPIPE, 86 },
576 #endif
577 #ifdef EUSERS
578 { "EUSERS", EUSERS, 87 },
579 #endif
580 #ifdef ENOTSOCK
581 { "ENOTSOCK", ENOTSOCK, 88 },
582 #endif
583 #ifdef EDESTADDRREQ
584 { "EDESTADDRREQ", EDESTADDRREQ, 89 },
585 #endif
586 #ifdef EMSGSIZE
587 { "EMSGSIZE", EMSGSIZE, 90 },
588 #endif
589 #ifdef EPROTOTYPE
590 { "EPROTOTYPE", EPROTOTYPE, 91 },
591 #endif
592 #ifdef ENOPROTOOPT
593 { "ENOPROTOOPT", ENOPROTOOPT, 92 },
594 #endif
595 #ifdef EPROTONOSUPPORT
596 { "EPROTONOSUPPORT", EPROTONOSUPPORT, 93 },
597 #endif
598 #ifdef ESOCKTNOSUPPORT
599 { "ESOCKTNOSUPPORT", ESOCKTNOSUPPORT, 94 },
600 #endif
601 #ifdef EOPNOTSUPP
602 { "EOPNOTSUPP", EOPNOTSUPP, 95 },
603 #endif
604 #ifdef EPFNOSUPPORT
605 { "EPFNOSUPPORT", EPFNOSUPPORT, 96 },
606 #endif
607 #ifdef EAFNOSUPPORT
608 { "EAFNOSUPPORT", EAFNOSUPPORT, 97 },
609 #endif
610 #ifdef EADDRINUSE
611 { "EADDRINUSE", EADDRINUSE, 98 },
612 #endif
613 #ifdef EADDRNOTAVAIL
614 { "EADDRNOTAVAIL", EADDRNOTAVAIL, 99 },
615 #endif
616 #ifdef ENETDOWN
617 { "ENETDOWN", ENETDOWN, 100 },
618 #endif
619 #ifdef ENETUNREACH
620 { "ENETUNREACH", ENETUNREACH, 101 },
621 #endif
622 #ifdef ENETRESET
623 { "ENETRESET", ENETRESET, 102 },
624 #endif
625 #ifdef ECONNABORTED
626 { "ECONNABORTED", ECONNABORTED, 103 },
627 #endif
628 #ifdef ECONNRESET
629 { "ECONNRESET", ECONNRESET, 104 },
630 #endif
631 #ifdef ENOBUFS
632 { "ENOBUFS", ENOBUFS, 105 },
633 #endif
634 #ifdef EISCONN
635 { "EISCONN", EISCONN, 106 },
636 #endif
637 #ifdef ENOTCONN
638 { "ENOTCONN", ENOTCONN, 107 },
639 #endif
640 #ifdef ESHUTDOWN
641 { "ESHUTDOWN", ESHUTDOWN, 108 },
642 #endif
643 #ifdef ETOOMANYREFS
644 { "ETOOMANYREFS", ETOOMANYREFS, 109 },
645 #endif
646 #ifdef ETIMEDOUT
647 { "ETIMEDOUT", ETIMEDOUT, 110 },
648 #endif
649 #ifdef ECONNREFUSED
650 { "ECONNREFUSED", ECONNREFUSED, 111 },
651 #endif
652 #ifdef EHOSTDOWN
653 { "EHOSTDOWN", EHOSTDOWN, 112 },
654 #endif
655 #ifdef EHOSTUNREACH
656 { "EHOSTUNREACH", EHOSTUNREACH, 113 },
657 #endif
658 #ifdef EALREADY
659 { "EALREADY", EALREADY, 114 },
660 #endif
661 #ifdef EINPROGRESS
662 { "EINPROGRESS", EINPROGRESS, 115 },
663 #endif
664 #ifdef ESTALE
665 { "ESTALE", ESTALE, 116 },
666 #endif
667 #ifdef EUCLEAN
668 { "EUCLEAN", EUCLEAN, 117 },
669 #endif
670 #ifdef ENOTNAM
671 { "ENOTNAM", ENOTNAM, 118 },
672 #endif
673 #ifdef ENAVAIL
674 { "ENAVAIL", ENAVAIL, 119 },
675 #endif
676 #ifdef EISNAM
677 { "EISNAM", EISNAM, 120 },
678 #endif
679 #ifdef EREMOTEIO
680 { "EREMOTEIO", EREMOTEIO, 121 },
681 #endif
682 #ifdef EDQUOT
683 { "EDQUOT", EDQUOT, 122 },
684 #endif
685 #ifdef ENOMEDIUM
686 { "ENOMEDIUM", ENOMEDIUM, 123 },
687 #endif
688 #ifdef EMEDIUMTYPE
689 { "EMEDIUMTYPE", EMEDIUMTYPE, 124 },
690 #endif
691 { 0, 0, 0 }
692 };
693
694 /* Extracted by applying
695 perl -ne 'if ($_ =~ /^#define/) { split;
696 printf "#ifdef $_[1]\n { %s, 0x%x },\n#endif\n",
697 $_[1], $_[2] =~ /^0/ ? oct($_[2]) : $_[2];}'
698 on pertinent parts of .../include/asm/fcntl.h in a GNU/Linux/CRIS
699 installation and removing synonyms and unnecessary items. Don't
700 forget the end-marker. */
701
702 /* These we treat specially, as they're used in the fcntl F_GETFL
703 syscall. For consistency, open_map is also manually edited to use
704 these macros. */
705 #define TARGET_O_ACCMODE 0x3
706 #define TARGET_O_RDONLY 0x0
707 #define TARGET_O_WRONLY 0x1
708
709 static const CB_TARGET_DEFS_MAP open_map[] = {
710 #ifdef O_ACCMODE
711 { "O_ACCMODE", O_ACCMODE, TARGET_O_ACCMODE },
712 #endif
713 #ifdef O_RDONLY
714 { "O_RDONLY", O_RDONLY, TARGET_O_RDONLY },
715 #endif
716 #ifdef O_WRONLY
717 { "O_WRONLY", O_WRONLY, TARGET_O_WRONLY },
718 #endif
719 #ifdef O_RDWR
720 { "O_RDWR", O_RDWR, 0x2 },
721 #endif
722 #ifdef O_CREAT
723 { "O_CREAT", O_CREAT, 0x40 },
724 #endif
725 #ifdef O_EXCL
726 { "O_EXCL", O_EXCL, 0x80 },
727 #endif
728 #ifdef O_NOCTTY
729 { "O_NOCTTY", O_NOCTTY, 0x100 },
730 #endif
731 #ifdef O_TRUNC
732 { "O_TRUNC", O_TRUNC, 0x200 },
733 #endif
734 #ifdef O_APPEND
735 { "O_APPEND", O_APPEND, 0x400 },
736 #endif
737 #ifdef O_NONBLOCK
738 { "O_NONBLOCK", O_NONBLOCK, 0x800 },
739 #endif
740 #ifdef O_NDELAY
741 { "O_NDELAY", O_NDELAY, 0x0 },
742 #endif
743 #ifdef O_SYNC
744 { "O_SYNC", O_SYNC, 0x1000 },
745 #endif
746 #ifdef FASYNC
747 { "FASYNC", FASYNC, 0x2000 },
748 #endif
749 #ifdef O_DIRECT
750 { "O_DIRECT", O_DIRECT, 0x4000 },
751 #endif
752 #ifdef O_LARGEFILE
753 { "O_LARGEFILE", O_LARGEFILE, 0x8000 },
754 #endif
755 #ifdef O_DIRECTORY
756 { "O_DIRECTORY", O_DIRECTORY, 0x10000 },
757 #endif
758 #ifdef O_NOFOLLOW
759 { "O_NOFOLLOW", O_NOFOLLOW, 0x20000 },
760 #endif
761 { 0, -1, -1 }
762 };
763
764 /* Let's be less drastic and more traceable. FIXME: mark as noreturn. */
765 #define abort() \
766 sim_io_error (sd, "simulator unhandled condition at %s:%d", \
767 __FUNCTION__, __LINE__)
768
769 /* Needed for the cris_pipe_nonempty and cris_pipe_empty syscalls. */
770 static SIM_CPU *current_cpu_for_cb_callback;
771
772 static USI create_map (SIM_DESC, struct cris_sim_mmapped_page **,
773 USI addr, USI len);
774 static USI unmap_pages (SIM_DESC, struct cris_sim_mmapped_page **,
775 USI addr, USI len);
776 static USI is_mapped (SIM_DESC, struct cris_sim_mmapped_page **,
777 USI addr, USI len);
778 static void dump_statistics (SIM_CPU *current_cpu);
779 static void make_first_thread (SIM_CPU *current_cpu);
780
781 /* When we risk running self-modified code (as in trampolines), this is
782 called from special-case insns. The silicon CRIS CPU:s have enough
783 cache snooping implemented making this a simulator-only issue. Tests:
784 gcc.c-torture/execute/931002-1.c execution, -O3 -g
785 gcc.c-torture/execute/931002-1.c execution, -O3 -fomit-frame-pointer. */
786
787 void
788 cris_flush_simulator_decode_cache (SIM_CPU *current_cpu,
789 USI pc ATTRIBUTE_UNUSED)
790 {
791 SIM_DESC sd = CPU_STATE (current_cpu);
792
793 #if WITH_SCACHE
794 if (USING_SCACHE_P (sd))
795 scache_flush_cpu (current_cpu);
796 #endif
797 }
798
799 /* Output statistics at the end of a run. */
800 static void
801 dump_statistics (SIM_CPU *current_cpu)
802 {
803 SIM_DESC sd = CPU_STATE (current_cpu);
804 CRIS_MISC_PROFILE *profp
805 = CPU_CRIS_MISC_PROFILE (current_cpu);
806 unsigned64 total = profp->basic_cycle_count;
807
808 /* Historically, these messages have gone to stderr, so we'll keep it
809 that way. It's also easier to then tell it from normal program
810 output. FIXME: Add redirect option like "run -e file". */
811
812 /* The --cris-stats={basic|unaligned|schedulable|all} counts affect
813 what's included in the "total" count only. */
814 switch (CPU_CRIS_MISC_PROFILE (current_cpu)->flags
815 & FLAG_CRIS_MISC_PROFILE_ALL)
816 {
817 case FLAG_CRIS_MISC_PROFILE_SIMPLE:
818 sim_io_eprintf (sd, "Basic clock cycles, total @: %" PRIu64 "\n", total);
819 break;
820
821 case (FLAG_CRIS_MISC_PROFILE_UNALIGNED | FLAG_CRIS_MISC_PROFILE_SIMPLE):
822 total += profp->unaligned_mem_dword_count;
823 sim_io_eprintf (sd,
824 "Clock cycles including stall cycles for unaligned "
825 "accesses @: %" PRIu64 "\n",
826 total);
827 break;
828
829 case (FLAG_CRIS_MISC_PROFILE_SCHEDULABLE | FLAG_CRIS_MISC_PROFILE_SIMPLE):
830 total
831 += (profp->memsrc_stall_count
832 + profp->memraw_stall_count
833 + profp->movemsrc_stall_count
834 + profp->movemdst_stall_count
835 + profp->mulsrc_stall_count
836 + profp->jumpsrc_stall_count
837 + profp->unaligned_mem_dword_count);
838 sim_io_eprintf (sd, "Schedulable clock cycles, total @: %" PRIu64 "\n",
839 total);
840 break;
841
842 case FLAG_CRIS_MISC_PROFILE_ALL:
843 total
844 += (profp->memsrc_stall_count
845 + profp->memraw_stall_count
846 + profp->movemsrc_stall_count
847 + profp->movemdst_stall_count
848 + profp->movemaddr_stall_count
849 + profp->mulsrc_stall_count
850 + profp->jumpsrc_stall_count
851 + profp->branch_stall_count
852 + profp->jumptarget_stall_count
853 + profp->unaligned_mem_dword_count);
854 sim_io_eprintf (sd, "All accounted clock cycles, total @: %" PRIu64 "\n",
855 total);
856 break;
857
858 default:
859 sim_engine_abort (sd, current_cpu, 0,
860 "Internal inconsistency at %s:%d",
861 __FILE__, __LINE__);
862 }
863
864 /* For v32, unaligned_mem_dword_count should always be 0. For
865 v10, memsrc_stall_count should always be 0. */
866 sim_io_eprintf (sd, "Memory source stall cycles: %" PRIu64 "\n",
867 profp->memsrc_stall_count + profp->unaligned_mem_dword_count);
868 sim_io_eprintf (sd, "Memory read-after-write stall cycles: %" PRIu64 "\n",
869 profp->memraw_stall_count);
870 sim_io_eprintf (sd, "Movem source stall cycles: %" PRIu64 "\n",
871 profp->movemsrc_stall_count);
872 sim_io_eprintf (sd, "Movem destination stall cycles: %" PRIu64 "\n",
873 profp->movemdst_stall_count);
874 sim_io_eprintf (sd, "Movem address stall cycles: %" PRIu64 "\n",
875 profp->movemaddr_stall_count);
876 sim_io_eprintf (sd, "Multiplication source stall cycles: %" PRIu64 "\n",
877 profp->mulsrc_stall_count);
878 sim_io_eprintf (sd, "Jump source stall cycles: %" PRIu64 "\n",
879 profp->jumpsrc_stall_count);
880 sim_io_eprintf (sd, "Branch misprediction stall cycles: %" PRIu64 "\n",
881 profp->branch_stall_count);
882 sim_io_eprintf (sd, "Jump target stall cycles: %" PRIu64 "\n",
883 profp->jumptarget_stall_count);
884 }
885
886 /* Check whether any part of [addr .. addr + len - 1] is already mapped.
887 Return 1 if a overlap detected, 0 otherwise. */
888
889 static USI
890 is_mapped (SIM_DESC sd ATTRIBUTE_UNUSED,
891 struct cris_sim_mmapped_page **rootp,
892 USI addr, USI len)
893 {
894 struct cris_sim_mmapped_page *mapp;
895
896 if (len == 0 || (len & 8191))
897 abort ();
898
899 /* Iterate over the reverse-address sorted pages until we find a page in
900 or lower than the checked area. */
901 for (mapp = *rootp; mapp != NULL && mapp->addr >= addr; mapp = mapp->prev)
902 if (mapp->addr < addr + len && mapp->addr >= addr)
903 return 1;
904
905 return 0;
906 }
907
908 /* Check whether any part of [addr .. addr + len - 1] is *un*mapped.
909 Return 1 if the whole area is mapped, 0 otherwise. */
910
911 static USI
912 is_mapped_only (SIM_DESC sd ATTRIBUTE_UNUSED,
913 struct cris_sim_mmapped_page **rootp,
914 USI addr, USI len)
915 {
916 struct cris_sim_mmapped_page *mapp;
917
918 if (len == 0 || (len & 8191))
919 abort ();
920
921 /* Iterate over the reverse-address sorted pages until we find a page
922 lower than the checked area. */
923 for (mapp = *rootp; mapp != NULL && mapp->addr >= addr; mapp = mapp->prev)
924 if (addr == mapp->addr && len == 8192)
925 return 1;
926 else if (addr + len > mapp->addr)
927 len -= 8192;
928
929 return 0;
930 }
931
932 /* Debug helper; to be run from gdb. */
933
934 void
935 cris_dump_map (SIM_CPU *current_cpu)
936 {
937 struct cris_sim_mmapped_page *mapp;
938 USI start, end;
939
940 for (mapp = current_cpu->highest_mmapped_page,
941 start = mapp == NULL ? 0 : mapp->addr + 8192,
942 end = mapp == NULL ? 0 : mapp->addr + 8191;
943 mapp != NULL;
944 mapp = mapp->prev)
945 {
946 if (mapp->addr != start - 8192)
947 {
948 sim_io_eprintf (CPU_STATE (current_cpu), "0x%x..0x%x\n", start, end);
949 end = mapp->addr + 8191;
950 }
951
952 start = mapp->addr;
953 }
954
955 if (current_cpu->highest_mmapped_page != NULL)
956 sim_io_eprintf (CPU_STATE (current_cpu), "0x%x..0x%x\n", start, end);
957 }
958
959 /* Create mmapped memory. ADDR is -1 if any address will do. Caller
960 must make sure that the address isn't already mapped. */
961
962 static USI
963 create_map (SIM_DESC sd, struct cris_sim_mmapped_page **rootp, USI addr,
964 USI len)
965 {
966 struct cris_sim_mmapped_page *mapp;
967 struct cris_sim_mmapped_page **higher_prevp = rootp;
968 USI new_addr = 0x40000000;
969
970 if (addr != (USI) -1)
971 new_addr = addr;
972 else if (*rootp && rootp[0]->addr >= new_addr)
973 new_addr = rootp[0]->addr + 8192;
974
975 if (len != 8192)
976 {
977 USI page_addr;
978
979 if (len & 8191)
980 /* Which is better: return an error for this, or just round it up? */
981 abort ();
982
983 /* Do a recursive call for each page in the request. */
984 for (page_addr = new_addr; len != 0; page_addr += 8192, len -= 8192)
985 if (create_map (sd, rootp, page_addr, 8192) >= (USI) -8191)
986 abort ();
987
988 return new_addr;
989 }
990
991 for (mapp = *rootp;
992 mapp != NULL && mapp->addr > new_addr;
993 mapp = mapp->prev)
994 higher_prevp = &mapp->prev;
995
996 /* Assert for consistency that we don't create duplicate maps. */
997 if (is_mapped (sd, rootp, new_addr, len))
998 abort ();
999
1000 /* Allocate the new page, on the next higher page from the last one
1001 allocated, and link in the new descriptor before previous ones. */
1002 mapp = malloc (sizeof (*mapp));
1003
1004 if (mapp == NULL)
1005 return (USI) -ENOMEM;
1006
1007 sim_core_attach (sd, NULL, 0, access_read_write_exec, 0,
1008 new_addr, len,
1009 0, NULL, NULL);
1010
1011 mapp->addr = new_addr;
1012 mapp->prev = *higher_prevp;
1013 *higher_prevp = mapp;
1014
1015 return new_addr;
1016 }
1017
1018 /* Unmap one or more pages. */
1019
1020 static USI
1021 unmap_pages (SIM_DESC sd, struct cris_sim_mmapped_page **rootp, USI addr,
1022 USI len)
1023 {
1024 struct cris_sim_mmapped_page *mapp;
1025 struct cris_sim_mmapped_page **higher_prevp = rootp;
1026
1027 if (len != 8192)
1028 {
1029 USI page_addr;
1030 int ret = 0;
1031
1032 if (len & 8191)
1033 /* Which is better: return an error for this, or just round it up? */
1034 abort ();
1035
1036 /* Loop backwards to make each call is O(1) over the number of pages
1037 allocated, if we're unmapping from the high end of the pages. */
1038 for (page_addr = addr + len - 8192;
1039 page_addr > addr;
1040 page_addr -= 8192)
1041 if (unmap_pages (sd, rootp, page_addr, 8192))
1042 ret = EINVAL;
1043
1044 if (unmap_pages (sd, rootp, addr, 8192))
1045 ret = EINVAL;
1046
1047 return ret;
1048 }
1049
1050 for (mapp = *rootp; mapp != NULL && mapp->addr > addr; mapp = mapp->prev)
1051 higher_prevp = &mapp->prev;
1052
1053 if (mapp == NULL || mapp->addr != addr)
1054 return EINVAL;
1055
1056 *higher_prevp = mapp->prev;
1057 sim_core_detach (sd, NULL, 0, 0, addr);
1058 free (mapp);
1059 return 0;
1060 }
1061
1062 /* The semantic code invokes this for illegal (unrecognized) instructions. */
1063
1064 SEM_PC
1065 sim_engine_invalid_insn (SIM_CPU *current_cpu, IADDR cia, SEM_PC vpc)
1066 {
1067 SIM_DESC sd = CPU_STATE (current_cpu);
1068
1069 sim_engine_halt (sd, current_cpu, NULL, cia, sim_stopped, SIM_SIGILL);
1070 return vpc;
1071 }
1072
1073 /* Handlers from the CGEN description that should not be called. */
1074
1075 USI
1076 cris_bmod_handler (SIM_CPU *current_cpu ATTRIBUTE_UNUSED,
1077 UINT srcreg ATTRIBUTE_UNUSED,
1078 USI dstreg ATTRIBUTE_UNUSED)
1079 {
1080 SIM_DESC sd = CPU_STATE (current_cpu);
1081 abort ();
1082 }
1083
1084 void
1085 h_supr_set_handler (SIM_CPU *current_cpu ATTRIBUTE_UNUSED,
1086 UINT index ATTRIBUTE_UNUSED,
1087 USI page ATTRIBUTE_UNUSED,
1088 USI newval ATTRIBUTE_UNUSED)
1089 {
1090 SIM_DESC sd = CPU_STATE (current_cpu);
1091 abort ();
1092 }
1093
1094 USI
1095 h_supr_get_handler (SIM_CPU *current_cpu ATTRIBUTE_UNUSED,
1096 UINT index ATTRIBUTE_UNUSED,
1097 USI page ATTRIBUTE_UNUSED)
1098 {
1099 SIM_DESC sd = CPU_STATE (current_cpu);
1100 abort ();
1101 }
1102
1103 /* Swap one context for another. */
1104
1105 static void
1106 schedule (SIM_CPU *current_cpu, int next)
1107 {
1108 /* Need to mark context-switches in the trace output. */
1109 if ((CPU_CRIS_MISC_PROFILE (current_cpu)->flags
1110 & FLAG_CRIS_MISC_PROFILE_XSIM_TRACE))
1111 cris_trace_printf (CPU_STATE (current_cpu), current_cpu,
1112 "\t#:%d\n", next);
1113
1114 /* Copy the current context (if there is one) to its slot. */
1115 if (current_cpu->thread_data[current_cpu->threadno].cpu_context)
1116 memcpy (current_cpu->thread_data[current_cpu->threadno].cpu_context,
1117 &current_cpu->cpu_data_placeholder,
1118 current_cpu->thread_cpu_data_size);
1119
1120 /* Copy the new context from its slot. */
1121 memcpy (&current_cpu->cpu_data_placeholder,
1122 current_cpu->thread_data[next].cpu_context,
1123 current_cpu->thread_cpu_data_size);
1124
1125 /* Update needed stuff to indicate the new context. */
1126 current_cpu->threadno = next;
1127
1128 /* Handle pending signals. */
1129 if (current_cpu->thread_data[next].sigpending
1130 /* We don't run nested signal handlers. This means that pause(2)
1131 and sigsuspend(2) do not work in sighandlers, but that
1132 shouldn't be too hard a restriction. It also greatly
1133 simplifies the code. */
1134 && current_cpu->thread_data[next].cpu_context_atsignal == NULL)
1135 {
1136 int sig;
1137
1138 /* See if there's really a pending, non-blocked handler. We don't
1139 queue signals, so just use the first one in ascending order. */
1140 for (sig = 0; sig < 64; sig++)
1141 if (current_cpu->thread_data[next].sigdata[sig].pending
1142 && !current_cpu->thread_data[next].sigdata[sig].blocked)
1143 {
1144 bfd_byte regbuf[4];
1145 USI sp;
1146 int i;
1147 USI blocked;
1148 USI pc = sim_pc_get (current_cpu);
1149
1150 /* It's simpler to save the CPU context inside the simulator
1151 than on the stack. */
1152 current_cpu->thread_data[next].cpu_context_atsignal
1153 = (*current_cpu
1154 ->make_thread_cpu_data) (current_cpu,
1155 current_cpu->thread_data[next]
1156 .cpu_context);
1157
1158 (*CPU_REG_FETCH (current_cpu)) (current_cpu, H_GR_SP, regbuf, 4);
1159 sp = bfd_getl32 (regbuf);
1160
1161 /* Make sure we have an aligned stack. */
1162 sp &= ~3;
1163
1164 /* Make room for the signal frame, aligned. FIXME: Check that
1165 the memory exists, map it in if absent. (BTW, should also
1166 implement on-access automatic stack allocation). */
1167 sp -= 20;
1168
1169 /* This isn't the same signal frame as the kernel uses, because
1170 we don't want to bother getting all registers on and off the
1171 stack. */
1172
1173 /* First, we store the currently blocked signals. */
1174 blocked = 0;
1175 for (i = 0; i < 32; i++)
1176 blocked
1177 |= current_cpu->thread_data[next].sigdata[i + 1].blocked << i;
1178 sim_core_write_aligned_4 (current_cpu, pc, 0, sp, blocked);
1179 blocked = 0;
1180 for (i = 0; i < 31; i++)
1181 blocked
1182 |= current_cpu->thread_data[next].sigdata[i + 33].blocked << i;
1183 sim_core_write_aligned_4 (current_cpu, pc, 0, sp + 4, blocked);
1184
1185 /* Then, the actual instructions. This is CPU-specific, but we
1186 use instructions from the common subset for v10 and v32 which
1187 should be safe for the time being but could be parametrized
1188 if need be. */
1189 /* MOVU.W [PC+],R9. */
1190 sim_core_write_aligned_2 (current_cpu, pc, 0, sp + 8, 0x9c5f);
1191 /* .WORD TARGET_SYS_sigreturn. */
1192 sim_core_write_aligned_2 (current_cpu, pc, 0, sp + 10,
1193 TARGET_SYS_sigreturn);
1194 /* BREAK 13. */
1195 sim_core_write_aligned_2 (current_cpu, pc, 0, sp + 12, 0xe93d);
1196
1197 /* NOP (on v32; it's SETF on v10, but is the correct compatible
1198 instruction. Still, it doesn't matter because v10 has no
1199 delay slot for BREAK so it will not be executed). */
1200 sim_core_write_aligned_2 (current_cpu, pc, 0, sp + 16, 0x05b0);
1201
1202 /* Modify registers to hold the right values for the sighandler
1203 context: updated stackpointer and return address pointing to
1204 the sigreturn stub. */
1205 bfd_putl32 (sp, regbuf);
1206 (*CPU_REG_STORE (current_cpu)) (current_cpu, H_GR_SP, regbuf, 4);
1207 bfd_putl32 (sp + 8, regbuf);
1208 (*CPU_REG_STORE (current_cpu)) (current_cpu, TARGET_SRP_REGNUM,
1209 regbuf, 4);
1210
1211 current_cpu->thread_data[next].sigdata[sig].pending = 0;
1212
1213 /* Block this signal (for the duration of the sighandler). */
1214 current_cpu->thread_data[next].sigdata[sig].blocked = 1;
1215
1216 sim_pc_set (current_cpu, current_cpu->sighandler[sig]);
1217 bfd_putl32 (sig, regbuf);
1218 (*CPU_REG_STORE (current_cpu)) (current_cpu, H_GR_R10,
1219 regbuf, 4);
1220
1221 /* We ignore a SA_SIGINFO flag in the sigaction call; the code I
1222 needed all this for, specifies a SA_SIGINFO call but treats it
1223 like an ordinary sighandler; only the signal number argument is
1224 inspected. To make future need to implement SA_SIGINFO
1225 correctly possible, we set the siginfo argument register to a
1226 magic (hopefully non-address) number. (NB: then, you should
1227 just need to pass the siginfo argument; it seems you probably
1228 don't need to implement the specific rt_sigreturn.) */
1229 bfd_putl32 (0xbad5161f, regbuf);
1230 (*CPU_REG_STORE (current_cpu)) (current_cpu, H_GR_R11,
1231 regbuf, 4);
1232
1233 /* The third argument is unused and the kernel sets it to 0. */
1234 bfd_putl32 (0, regbuf);
1235 (*CPU_REG_STORE (current_cpu)) (current_cpu, H_GR_R12,
1236 regbuf, 4);
1237 return;
1238 }
1239
1240 /* No, there actually was no pending signal for this thread. Reset
1241 this flag. */
1242 current_cpu->thread_data[next].sigpending = 0;
1243 }
1244 }
1245
1246 /* Reschedule the simplest possible way until something else is absolutely
1247 necessary:
1248 - A. Find the next process (round-robin) that doesn't have at_syscall
1249 set, schedule it.
1250 - B. If there is none, just run the next process, round-robin.
1251 - Clear at_syscall for the current process. */
1252
1253 static void
1254 reschedule (SIM_CPU *current_cpu)
1255 {
1256 SIM_DESC sd = CPU_STATE (current_cpu);
1257 int i;
1258
1259 /* Iterate over all thread slots, because after a few thread creations
1260 and exits, we don't know where the live ones are. */
1261 for (i = (current_cpu->threadno + 1) % SIM_TARGET_MAX_THREADS;
1262 i != current_cpu->threadno;
1263 i = (i + 1) % SIM_TARGET_MAX_THREADS)
1264 if (current_cpu->thread_data[i].cpu_context
1265 && current_cpu->thread_data[i].at_syscall == 0)
1266 {
1267 schedule (current_cpu, i);
1268 return;
1269 }
1270
1271 /* Pick any next live thread. */
1272 for (i = (current_cpu->threadno + 1) % SIM_TARGET_MAX_THREADS;
1273 i != current_cpu->threadno;
1274 i = (i + 1) % SIM_TARGET_MAX_THREADS)
1275 if (current_cpu->thread_data[i].cpu_context)
1276 {
1277 schedule (current_cpu, i);
1278 return;
1279 }
1280
1281 /* More than one live thread, but we couldn't find the next one? */
1282 abort ();
1283 }
1284
1285 /* Set up everything to receive (or IGN) an incoming signal to the
1286 current context. */
1287
1288 static int
1289 deliver_signal (SIM_CPU *current_cpu, int sig, unsigned int pid)
1290 {
1291 int i;
1292 USI pc = sim_pc_get (current_cpu);
1293
1294 /* Find the thread index of the pid. */
1295 for (i = 0; i < SIM_TARGET_MAX_THREADS; i++)
1296 /* Apparently it's ok to send signals to zombies (so a check for
1297 current_cpu->thread_data[i].cpu_context != NULL would be
1298 wrong). */
1299 if (current_cpu->thread_data[i].threadid == pid - TARGET_PID)
1300 {
1301 if (sig < 64)
1302 switch (current_cpu->sighandler[sig])
1303 {
1304 case TARGET_SIG_DFL:
1305 switch (sig)
1306 {
1307 /* The following according to the glibc
1308 documentation. (The kernel code has non-obvious
1309 execution paths.) */
1310 case TARGET_SIGFPE:
1311 case TARGET_SIGILL:
1312 case TARGET_SIGSEGV:
1313 case TARGET_SIGBUS:
1314 case TARGET_SIGABRT:
1315 case TARGET_SIGTRAP:
1316 case TARGET_SIGSYS:
1317
1318 case TARGET_SIGTERM:
1319 case TARGET_SIGINT:
1320 case TARGET_SIGQUIT:
1321 case TARGET_SIGKILL:
1322 case TARGET_SIGHUP:
1323
1324 case TARGET_SIGALRM:
1325 case TARGET_SIGVTALRM:
1326 case TARGET_SIGPROF:
1327 case TARGET_SIGSTOP:
1328
1329 case TARGET_SIGPIPE:
1330 case TARGET_SIGLOST:
1331 case TARGET_SIGXCPU:
1332 case TARGET_SIGXFSZ:
1333 case TARGET_SIGUSR1:
1334 case TARGET_SIGUSR2:
1335 sim_io_eprintf (CPU_STATE (current_cpu),
1336 "Exiting pid %d due to signal %d\n",
1337 pid, sig);
1338 sim_engine_halt (CPU_STATE (current_cpu), current_cpu,
1339 NULL, pc, sim_stopped,
1340 sig == TARGET_SIGABRT
1341 ? SIM_SIGABRT : SIM_SIGILL);
1342 return 0;
1343
1344 /* The default for all other signals is to be ignored. */
1345 default:
1346 return 0;
1347 }
1348
1349 case TARGET_SIG_IGN:
1350 switch (sig)
1351 {
1352 case TARGET_SIGKILL:
1353 case TARGET_SIGSTOP:
1354 /* Can't ignore these signals. */
1355 sim_io_eprintf (CPU_STATE (current_cpu),
1356 "Exiting pid %d due to signal %d\n",
1357 pid, sig);
1358 sim_engine_halt (CPU_STATE (current_cpu), current_cpu,
1359 NULL, pc, sim_stopped, SIM_SIGILL);
1360 return 0;
1361
1362 default:
1363 return 0;
1364 }
1365 break;
1366
1367 default:
1368 /* Mark the signal as pending, making schedule () check
1369 closer. The signal will be handled when the thread is
1370 scheduled and the signal is unblocked. */
1371 current_cpu->thread_data[i].sigdata[sig].pending = 1;
1372 current_cpu->thread_data[i].sigpending = 1;
1373 return 0;
1374 }
1375 else
1376 {
1377 sim_io_eprintf (CPU_STATE (current_cpu),
1378 "Unimplemented signal: %d\n", sig);
1379 sim_engine_halt (CPU_STATE (current_cpu), current_cpu, NULL, pc,
1380 sim_stopped, SIM_SIGILL);
1381 }
1382 }
1383
1384 return
1385 -cb_host_to_target_errno (STATE_CALLBACK (CPU_STATE (current_cpu)),
1386 ESRCH);
1387 }
1388
1389 /* Make the vector and the first item, the main thread. */
1390
1391 static void
1392 make_first_thread (SIM_CPU *current_cpu)
1393 {
1394 SIM_DESC sd = CPU_STATE (current_cpu);
1395 current_cpu->thread_data
1396 = xcalloc (1,
1397 SIM_TARGET_MAX_THREADS
1398 * sizeof (current_cpu->thread_data[0]));
1399 current_cpu->thread_data[0].cpu_context
1400 = (*current_cpu->make_thread_cpu_data) (current_cpu,
1401 &current_cpu
1402 ->cpu_data_placeholder);
1403 current_cpu->thread_data[0].parent_threadid = -1;
1404
1405 /* For good measure. */
1406 if (TARGET_SIG_DFL != 0)
1407 abort ();
1408 }
1409
1410 /* Handle unknown system calls. Returns (if it does) the syscall
1411 return value. */
1412
1413 static USI
1414 cris_unknown_syscall (SIM_CPU *current_cpu, USI pc, char *s, ...)
1415 {
1416 SIM_DESC sd = CPU_STATE (current_cpu);
1417 host_callback *cb = STATE_CALLBACK (sd);
1418
1419 if (cris_unknown_syscall_action == CRIS_USYSC_MSG_STOP
1420 || cris_unknown_syscall_action == CRIS_USYSC_MSG_ENOSYS)
1421 {
1422 va_list ap;
1423
1424 va_start (ap, s);
1425 sim_io_evprintf (sd, s, ap);
1426 va_end (ap);
1427
1428 if (cris_unknown_syscall_action == CRIS_USYSC_MSG_STOP)
1429 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped, SIM_SIGILL);
1430 }
1431
1432 return -cb_host_to_target_errno (cb, ENOSYS);
1433 }
1434
1435 /* Main function: the handler of the "break 13" syscall insn. */
1436
1437 USI
1438 cris_break_13_handler (SIM_CPU *current_cpu, USI callnum, USI arg1,
1439 USI arg2, USI arg3, USI arg4, USI arg5, USI arg6,
1440 USI pc)
1441 {
1442 CB_SYSCALL s;
1443 SIM_DESC sd = CPU_STATE (current_cpu);
1444 host_callback *cb = STATE_CALLBACK (sd);
1445 int retval;
1446 int threadno = current_cpu->threadno;
1447
1448 current_cpu->syscalls++;
1449
1450 CB_SYSCALL_INIT (&s);
1451 s.func = callnum;
1452 s.arg1 = arg1;
1453 s.arg2 = arg2;
1454 s.arg3 = arg3;
1455
1456 /* The type of s.arg2 is long, so for hosts with 64-bit longs, we need
1457 to sign-extend the lseek offset to be passed as a signed number,
1458 else we'll truncate it to something > 2GB on hosts where sizeof
1459 long > sizeof USI. We avoid doing it for all syscalls, as arg2 is
1460 e.g. an address for some syscalls. */
1461 if (callnum == TARGET_SYS_lseek)
1462 s.arg2 = (SI) arg2;
1463
1464 if (callnum == TARGET_SYS_exit_group
1465 || (callnum == TARGET_SYS_exit && current_cpu->m1threads == 0))
1466 {
1467 if (CPU_CRIS_MISC_PROFILE (current_cpu)->flags
1468 & FLAG_CRIS_MISC_PROFILE_ALL)
1469 dump_statistics (current_cpu);
1470 sim_engine_halt (sd, current_cpu, NULL, pc, sim_exited, arg1);
1471 }
1472
1473 s.p1 = (PTR) sd;
1474 s.p2 = (PTR) current_cpu;
1475 s.read_mem = sim_syscall_read_mem;
1476 s.write_mem = sim_syscall_write_mem;
1477
1478 current_cpu_for_cb_callback = current_cpu;
1479
1480 if (cb_syscall (cb, &s) != CB_RC_OK)
1481 {
1482 sim_engine_abort (sd, current_cpu, pc,
1483 "Break 13: invalid %d? Returned %ld\n", callnum,
1484 s.result);
1485 }
1486
1487 retval = s.result == -1 ? -s.errcode : s.result;
1488
1489 if (s.errcode != 0 && s.errcode == cb_host_to_target_errno (cb, ENOSYS))
1490 {
1491 /* If the generic simulator call said ENOSYS, then let's try the
1492 ones we know ourselves.
1493
1494 The convention is to provide *very limited* functionality on an
1495 as-needed basis, only what's covered by the test-suite, tests
1496 added when functionality changes and abort with a descriptive
1497 message for *everything* else. Where there's no test-case, we
1498 just abort. */
1499 switch (callnum)
1500 {
1501 case 0:
1502 /* It's a pretty safe bet that the "old setup() system call"
1503 number will not be re-used; we can't say the same for higher
1504 numbers. We treat this simulator-generated call as "wait
1505 forever"; we re-run this insn. The wait is ended by a
1506 callback. Sanity check that this is the reason we got
1507 here. */
1508 if (current_cpu->thread_data == NULL
1509 || (current_cpu->thread_data[threadno].pipe_write_fd == 0))
1510 goto unimplemented_syscall;
1511
1512 sim_pc_set (current_cpu, pc);
1513 retval = arg1;
1514 break;
1515
1516 case TARGET_SYS_fcntl64:
1517 case TARGET_SYS_fcntl:
1518 switch (arg2)
1519 {
1520 case 1:
1521 /* F_GETFD.
1522 Glibc checks stdin, stdout and stderr fd:s for
1523 close-on-exec security sanity. We just need to provide a
1524 OK return value. If we really need to have a
1525 close-on-exec flag true, we could just do a real fcntl
1526 here. */
1527 retval = 0;
1528 break;
1529
1530 case 2:
1531 /* F_SETFD. Just ignore attempts to set the close-on-exec
1532 flag. */
1533 retval = 0;
1534 break;
1535
1536 case 3:
1537 /* F_GETFL. Check for the special case for open+fdopen. */
1538 if (current_cpu->last_syscall == TARGET_SYS_open
1539 && arg1 == current_cpu->last_open_fd)
1540 {
1541 retval = current_cpu->last_open_flags & TARGET_O_ACCMODE;
1542 break;
1543 }
1544 else if (arg1 == 0)
1545 {
1546 /* Because we can't freopen fd:s 0, 1, 2 to mean
1547 something else than stdin, stdout and stderr
1548 (sim/common/syscall.c:cb_syscall special cases fd
1549 0, 1 and 2), we know what flags that we can
1550 sanely return for these fd:s. */
1551 retval = TARGET_O_RDONLY;
1552 break;
1553 }
1554 else if (arg1 == 1 || arg1 == 2)
1555 {
1556 retval = TARGET_O_WRONLY;
1557 break;
1558 }
1559 /* FALLTHROUGH */
1560 default:
1561 /* Nothing else is implemented. */
1562 retval
1563 = cris_unknown_syscall (current_cpu, pc,
1564 "Unimplemented %s syscall "
1565 "(fd: 0x%lx: cmd: 0x%lx arg: "
1566 "0x%lx)\n",
1567 callnum == TARGET_SYS_fcntl
1568 ? "fcntl" : "fcntl64",
1569 (unsigned long) (USI) arg1,
1570 (unsigned long) (USI) arg2,
1571 (unsigned long) (USI) arg3);
1572 break;
1573 }
1574 break;
1575
1576 case TARGET_SYS_uname:
1577 {
1578 /* Fill in a few constants to appease glibc. */
1579 static char sim_utsname[6][65] =
1580 {
1581 "Linux",
1582 "sim-target",
1583 "2.6.27",
1584 TARGET_UTSNAME,
1585 "cris", /* Overwritten below. */
1586 "localdomain"
1587 };
1588
1589 /* Having the hardware type in Linux equal to the bfd
1590 printable name is deliberate: if you make config.guess
1591 work on your Linux-type system the usual way, it
1592 probably will; either the bfd printable_name or the
1593 ambiguous arch_name. */
1594 strcpy (sim_utsname[4], STATE_ARCHITECTURE (sd)->printable_name);
1595
1596 if ((s.write_mem) (cb, &s, arg1, (const char *) sim_utsname,
1597 sizeof (sim_utsname))
1598 != sizeof (sim_utsname))
1599 retval = -cb_host_to_target_errno (cb, EFAULT);
1600 else
1601 retval = 0;
1602 break;
1603 }
1604
1605 case TARGET_SYS_geteuid32:
1606 /* We tell the truth with these. Maybe we shouldn't, but it
1607 should match the "stat" information. */
1608 retval = geteuid ();
1609 break;
1610
1611 case TARGET_SYS_getuid32:
1612 retval = getuid ();
1613 break;
1614
1615 case TARGET_SYS_getegid32:
1616 retval = getegid ();
1617 break;
1618
1619 case TARGET_SYS_getgid32:
1620 retval = getgid ();
1621 break;
1622
1623 case TARGET_SYS_brk:
1624 /* Most often, we just return the argument, like the Linux
1625 kernel. */
1626 retval = arg1;
1627
1628 if (arg1 == 0)
1629 retval = current_cpu->endbrk;
1630 else if (arg1 <= current_cpu->endmem)
1631 current_cpu->endbrk = arg1;
1632 else
1633 {
1634 USI new_end = (arg1 + 8191) & ~8191;
1635
1636 /* If the simulator wants to brk more than a certain very
1637 large amount, something is wrong. FIXME: Return an error
1638 or abort? Have command-line selectable? */
1639 if (new_end - current_cpu->endmem > SIM_MAX_ALLOC_CHUNK)
1640 {
1641 current_cpu->endbrk = current_cpu->endmem;
1642 retval = current_cpu->endmem;
1643 break;
1644 }
1645
1646 sim_core_attach (sd, NULL, 0, access_read_write_exec, 0,
1647 current_cpu->endmem,
1648 new_end - current_cpu->endmem,
1649 0, NULL, NULL);
1650 current_cpu->endbrk = arg1;
1651 current_cpu->endmem = new_end;
1652 }
1653 break;
1654
1655 case TARGET_SYS_getpid:
1656 /* Correct until CLONE_THREAD is implemented. */
1657 retval = current_cpu->thread_data == NULL
1658 ? TARGET_PID
1659 : TARGET_PID + current_cpu->thread_data[threadno].threadid;
1660 break;
1661
1662 case TARGET_SYS_getppid:
1663 /* Correct until CLONE_THREAD is implemented. */
1664 retval = current_cpu->thread_data == NULL
1665 ? TARGET_PID - 1
1666 : (TARGET_PID
1667 + current_cpu->thread_data[threadno].parent_threadid);
1668 break;
1669
1670 case TARGET_SYS_mmap2:
1671 {
1672 USI addr = arg1;
1673 USI len = arg2;
1674 USI prot = arg3;
1675 USI flags = arg4;
1676 USI fd = arg5;
1677 USI pgoff = arg6;
1678
1679 /* At 2.6.27, Linux (many (all?) ports, in the mmap2 syscalls)
1680 still masked away this bit, so let's just ignore
1681 it. */
1682 flags &= ~TARGET_MAP_DENYWRITE;
1683
1684 /* If the simulator wants to mmap more than the very large
1685 limit, something is wrong. FIXME: Return an error or
1686 abort? Have command-line selectable? */
1687 if (len > SIM_MAX_ALLOC_CHUNK)
1688 {
1689 retval = -cb_host_to_target_errno (cb, ENOMEM);
1690 break;
1691 }
1692
1693 if ((prot != (TARGET_PROT_READ | TARGET_PROT_WRITE)
1694 && (prot
1695 != (TARGET_PROT_READ
1696 | TARGET_PROT_WRITE
1697 | TARGET_PROT_EXEC))
1698 && (prot != (TARGET_PROT_READ | TARGET_PROT_EXEC))
1699 && prot != TARGET_PROT_READ)
1700 || (flags != (TARGET_MAP_ANONYMOUS | TARGET_MAP_PRIVATE)
1701 && flags != TARGET_MAP_PRIVATE
1702 && flags != (TARGET_MAP_ANONYMOUS
1703 | TARGET_MAP_PRIVATE | TARGET_MAP_FIXED)
1704 && flags != (TARGET_MAP_PRIVATE | TARGET_MAP_FIXED)
1705 && flags != TARGET_MAP_SHARED)
1706 || (fd != (USI) -1
1707 && prot != TARGET_PROT_READ
1708 && prot != (TARGET_PROT_READ | TARGET_PROT_EXEC)
1709 && prot != (TARGET_PROT_READ | TARGET_PROT_WRITE))
1710 || (fd == (USI) -1 && pgoff != 0)
1711 || (fd != (USI) -1 && (flags & TARGET_MAP_ANONYMOUS)))
1712 {
1713 retval
1714 = cris_unknown_syscall (current_cpu, pc,
1715 "Unimplemented mmap2 call "
1716 "(0x%lx, 0x%lx, 0x%lx, "
1717 "0x%lx, 0x%lx, 0x%lx)\n",
1718 (unsigned long) arg1,
1719 (unsigned long) arg2,
1720 (unsigned long) arg3,
1721 (unsigned long) arg4,
1722 (unsigned long) arg5,
1723 (unsigned long) arg6);
1724 break;
1725 }
1726 else if (fd != (USI) -1)
1727 {
1728 /* Map a file. */
1729
1730 USI newaddr;
1731 USI pos;
1732
1733 /* A non-aligned argument is allowed for files. */
1734 USI newlen = (len + 8191) & ~8191;
1735
1736 /* We only support read, read|exec, and read|write,
1737 which we should already have checked. Check again
1738 anyway. */
1739 if (prot != TARGET_PROT_READ
1740 && prot != (TARGET_PROT_READ | TARGET_PROT_EXEC)
1741 && prot != (TARGET_PROT_READ | TARGET_PROT_WRITE))
1742 abort ();
1743
1744 if (flags & TARGET_MAP_FIXED)
1745 unmap_pages (sd, &current_cpu->highest_mmapped_page,
1746 addr, newlen);
1747 else if (is_mapped (sd, &current_cpu->highest_mmapped_page,
1748 addr, newlen))
1749 addr = 0;
1750
1751 newaddr
1752 = create_map (sd, &current_cpu->highest_mmapped_page,
1753 addr != 0 || (flags & TARGET_MAP_FIXED)
1754 ? addr : -1,
1755 newlen);
1756
1757 if (newaddr >= (USI) -8191)
1758 {
1759 abort ();
1760 retval = -cb_host_to_target_errno (cb, -(SI) newaddr);
1761 break;
1762 }
1763
1764 /* We were asked for MAP_FIXED, but couldn't. */
1765 if ((flags & TARGET_MAP_FIXED) && newaddr != addr)
1766 {
1767 abort ();
1768 unmap_pages (sd, &current_cpu->highest_mmapped_page,
1769 newaddr, newlen);
1770 retval = -cb_host_to_target_errno (cb, EINVAL);
1771 break;
1772 }
1773
1774 /* Find the current position in the file. */
1775 s.func = TARGET_SYS_lseek;
1776 s.arg1 = fd;
1777 s.arg2 = 0;
1778 s.arg3 = SEEK_CUR;
1779 if (cb_syscall (cb, &s) != CB_RC_OK)
1780 abort ();
1781 pos = s.result;
1782
1783 if (s.result < 0)
1784 abort ();
1785
1786 /* Move to the correct offset in the file. */
1787 s.func = TARGET_SYS_lseek;
1788 s.arg1 = fd;
1789 s.arg2 = pgoff*8192;
1790 s.arg3 = SEEK_SET;
1791 if (cb_syscall (cb, &s) != CB_RC_OK)
1792 abort ();
1793
1794 if (s.result < 0)
1795 abort ();
1796
1797 /* Use the standard read callback to read in "len"
1798 bytes. */
1799 s.func = TARGET_SYS_read;
1800 s.arg1 = fd;
1801 s.arg2 = newaddr;
1802 s.arg3 = len;
1803 if (cb_syscall (cb, &s) != CB_RC_OK)
1804 abort ();
1805
1806 /* If the result is a page or more lesser than what
1807 was requested, something went wrong. */
1808 if (len >= 8192 && (USI) s.result <= len - 8192)
1809 abort ();
1810
1811 /* After reading, we need to go back to the previous
1812 position in the file. */
1813 s.func = TARGET_SYS_lseek;
1814 s.arg1 = fd;
1815 s.arg2 = pos;
1816 s.arg3 = SEEK_SET;
1817 if (cb_syscall (cb, &s) != CB_RC_OK)
1818 abort ();
1819 if (pos != (USI) s.result)
1820 abort ();
1821
1822 retval = newaddr;
1823 }
1824 else
1825 {
1826 USI newlen = (len + 8191) & ~8191;
1827 USI newaddr;
1828
1829 if (flags & TARGET_MAP_FIXED)
1830 unmap_pages (sd, &current_cpu->highest_mmapped_page,
1831 addr, newlen);
1832 else if (is_mapped (sd, &current_cpu->highest_mmapped_page,
1833 addr, newlen))
1834 addr = 0;
1835
1836 newaddr = create_map (sd, &current_cpu->highest_mmapped_page,
1837 addr != 0 || (flags & TARGET_MAP_FIXED)
1838 ? addr : -1,
1839 newlen);
1840
1841 if (newaddr >= (USI) -8191)
1842 retval = -cb_host_to_target_errno (cb, -(SI) newaddr);
1843 else
1844 retval = newaddr;
1845
1846 if ((flags & TARGET_MAP_FIXED) && newaddr != addr)
1847 {
1848 abort ();
1849 unmap_pages (sd, &current_cpu->highest_mmapped_page,
1850 newaddr, newlen);
1851 retval = -cb_host_to_target_errno (cb, EINVAL);
1852 break;
1853 }
1854 }
1855 break;
1856 }
1857
1858 case TARGET_SYS_mprotect:
1859 {
1860 /* We only cover the case of linuxthreads mprotecting out
1861 its stack guard page and of dynamic loading mprotecting
1862 away the data (for some reason the whole library, then
1863 mprotects away the data part and mmap-FIX:es it again. */
1864 USI addr = arg1;
1865 USI len = arg2;
1866 USI prot = arg3;
1867
1868 if (prot != TARGET_PROT_NONE
1869 || !is_mapped_only (sd, &current_cpu->highest_mmapped_page,
1870 addr, (len + 8191) & ~8191))
1871 {
1872 retval
1873 = cris_unknown_syscall (current_cpu, pc,
1874 "Unimplemented mprotect call "
1875 "(0x%lx, 0x%lx, 0x%lx)\n",
1876 (unsigned long) arg1,
1877 (unsigned long) arg2,
1878 (unsigned long) arg3);
1879 break;
1880 }
1881
1882 /* Just ignore this. We could make this equal to munmap,
1883 but then we'd have to make sure no anon mmaps gets this
1884 address before a subsequent MAP_FIXED mmap intended to
1885 override it. */
1886 retval = 0;
1887 break;
1888 }
1889
1890 case TARGET_SYS_ioctl:
1891 {
1892 /* We support only a very limited functionality: checking
1893 stdout with TCGETS to perform the isatty function. The
1894 TCGETS ioctl isn't actually performed or the result used by
1895 an isatty () caller in a "hello, world" program; only the
1896 return value is then used. Maybe we shouldn't care about
1897 the environment of the simulator regarding isatty, but
1898 that's been working before, in the xsim simulator. */
1899 if (arg2 == TARGET_TCGETS && arg1 == 1)
1900 retval = isatty (1) ? 0 : cb_host_to_target_errno (cb, EINVAL);
1901 else
1902 retval = -cb_host_to_target_errno (cb, EINVAL);
1903 break;
1904 }
1905
1906 case TARGET_SYS_munmap:
1907 {
1908 USI addr = arg1;
1909 USI len = arg2;
1910 USI result
1911 = unmap_pages (sd, &current_cpu->highest_mmapped_page, addr,
1912 len);
1913 retval = result != 0 ? -cb_host_to_target_errno (cb, result) : 0;
1914 break;
1915 }
1916
1917 case TARGET_SYS_wait4:
1918 {
1919 int i;
1920 USI pid = arg1;
1921 USI saddr = arg2;
1922 USI options = arg3;
1923 USI rusagep = arg4;
1924
1925 /* FIXME: We're not properly implementing __WCLONE, and we
1926 don't really need the special casing so we might as well
1927 make this general. */
1928 if ((!(pid == (USI) -1
1929 && options == (TARGET___WCLONE | TARGET_WNOHANG)
1930 && saddr != 0)
1931 && !(pid > 0
1932 && (options == TARGET___WCLONE
1933 || options == TARGET___WALL)))
1934 || rusagep != 0
1935 || current_cpu->thread_data == NULL)
1936 {
1937 retval
1938 = cris_unknown_syscall (current_cpu, pc,
1939 "Unimplemented wait4 call "
1940 "(0x%lx, 0x%lx, 0x%lx, 0x%lx)\n",
1941 (unsigned long) arg1,
1942 (unsigned long) arg2,
1943 (unsigned long) arg3,
1944 (unsigned long) arg4);
1945 break;
1946 }
1947
1948 if (pid == (USI) -1)
1949 for (i = 1; i < SIM_TARGET_MAX_THREADS; i++)
1950 {
1951 if (current_cpu->thread_data[threadno].threadid
1952 == current_cpu->thread_data[i].parent_threadid
1953 && current_cpu->thread_data[i].threadid != 0
1954 && current_cpu->thread_data[i].cpu_context == NULL)
1955 {
1956 /* A zombied child. Get the exit value and clear the
1957 zombied entry so it will be reused. */
1958 sim_core_write_unaligned_4 (current_cpu, pc, 0, saddr,
1959 current_cpu
1960 ->thread_data[i].exitval);
1961 retval
1962 = current_cpu->thread_data[i].threadid + TARGET_PID;
1963 memset (&current_cpu->thread_data[i], 0,
1964 sizeof (current_cpu->thread_data[i]));
1965 goto outer_break;
1966 }
1967 }
1968 else
1969 {
1970 /* We're waiting for a specific PID. If we don't find
1971 it zombied on this run, rerun the syscall. */
1972 for (i = 1; i < SIM_TARGET_MAX_THREADS; i++)
1973 if (pid == current_cpu->thread_data[i].threadid + TARGET_PID
1974 && current_cpu->thread_data[i].cpu_context == NULL)
1975 {
1976 if (saddr != 0)
1977 /* Get the exit value if the caller wants it. */
1978 sim_core_write_unaligned_4 (current_cpu, pc, 0,
1979 saddr,
1980 current_cpu
1981 ->thread_data[i]
1982 .exitval);
1983
1984 retval
1985 = current_cpu->thread_data[i].threadid + TARGET_PID;
1986 memset (&current_cpu->thread_data[i], 0,
1987 sizeof (current_cpu->thread_data[i]));
1988
1989 goto outer_break;
1990 }
1991
1992 sim_pc_set (current_cpu, pc);
1993 }
1994
1995 retval = -cb_host_to_target_errno (cb, ECHILD);
1996 outer_break:
1997 break;
1998 }
1999
2000 case TARGET_SYS_rt_sigaction:
2001 {
2002 USI signum = arg1;
2003 USI old_sa = arg3;
2004 USI new_sa = arg2;
2005
2006 /* The kernel says:
2007 struct sigaction {
2008 __sighandler_t sa_handler;
2009 unsigned long sa_flags;
2010 void (*sa_restorer)(void);
2011 sigset_t sa_mask;
2012 }; */
2013
2014 if (old_sa != 0)
2015 {
2016 sim_core_write_unaligned_4 (current_cpu, pc, 0, old_sa + 0,
2017 current_cpu->sighandler[signum]);
2018 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg3 + 4, 0);
2019 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg3 + 8, 0);
2020
2021 /* We'll assume _NSIG_WORDS is 2 for the kernel. */
2022 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg3 + 12, 0);
2023 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg3 + 16, 0);
2024 }
2025 if (new_sa != 0)
2026 {
2027 USI target_sa_handler
2028 = sim_core_read_unaligned_4 (current_cpu, pc, 0, new_sa);
2029 USI target_sa_flags
2030 = sim_core_read_unaligned_4 (current_cpu, pc, 0, new_sa + 4);
2031 USI target_sa_restorer
2032 = sim_core_read_unaligned_4 (current_cpu, pc, 0, new_sa + 8);
2033 USI target_sa_mask_low
2034 = sim_core_read_unaligned_4 (current_cpu, pc, 0, new_sa + 12);
2035 USI target_sa_mask_high
2036 = sim_core_read_unaligned_4 (current_cpu, pc, 0, new_sa + 16);
2037
2038 /* We won't interrupt a syscall so we won't restart it,
2039 but a signal(2) call ends up syscalling rt_sigaction
2040 with this flag, so we have to handle it. The
2041 sa_restorer field contains garbage when not
2042 TARGET_SA_RESTORER, so don't look at it. For the
2043 time being, we don't nest sighandlers, so we
2044 ignore the sa_mask, which simplifies things. */
2045 if ((target_sa_flags != 0
2046 && target_sa_flags != TARGET_SA_RESTART
2047 && target_sa_flags != (TARGET_SA_RESTART|TARGET_SA_SIGINFO))
2048 || target_sa_handler == 0)
2049 {
2050 retval
2051 = cris_unknown_syscall (current_cpu, pc,
2052 "Unimplemented rt_sigaction "
2053 "syscall "
2054 "(0x%lx, 0x%lx: "
2055 "[0x%x, 0x%x, 0x%x, "
2056 "{0x%x, 0x%x}], 0x%lx)\n",
2057 (unsigned long) arg1,
2058 (unsigned long) arg2,
2059 target_sa_handler,
2060 target_sa_flags,
2061 target_sa_restorer,
2062 target_sa_mask_low,
2063 target_sa_mask_high,
2064 (unsigned long) arg3);
2065 break;
2066 }
2067
2068 current_cpu->sighandler[signum] = target_sa_handler;
2069
2070 /* Because we may have unblocked signals, one may now be
2071 pending, if there are threads, that is. */
2072 if (current_cpu->thread_data)
2073 current_cpu->thread_data[threadno].sigpending = 1;
2074 }
2075 retval = 0;
2076 break;
2077 }
2078
2079 case TARGET_SYS_mremap:
2080 {
2081 USI addr = arg1;
2082 USI old_len = arg2;
2083 USI new_len = arg3;
2084 USI flags = arg4;
2085 USI new_addr = arg5;
2086 USI mapped_addr;
2087
2088 if (new_len == old_len)
2089 /* The program and/or library is possibly confused but
2090 this is a valid call. Happens with ipps-1.40 on file
2091 svs_all. */
2092 retval = addr;
2093 else if (new_len < old_len)
2094 {
2095 /* Shrinking is easy. */
2096 if (unmap_pages (sd, &current_cpu->highest_mmapped_page,
2097 addr + new_len, old_len - new_len) != 0)
2098 retval = -cb_host_to_target_errno (cb, EINVAL);
2099 else
2100 retval = addr;
2101 }
2102 else if (! is_mapped (sd, &current_cpu->highest_mmapped_page,
2103 addr + old_len, new_len - old_len))
2104 {
2105 /* If the extension isn't mapped, we can just add it. */
2106 mapped_addr
2107 = create_map (sd, &current_cpu->highest_mmapped_page,
2108 addr + old_len, new_len - old_len);
2109
2110 if (mapped_addr > (USI) -8192)
2111 retval = -cb_host_to_target_errno (cb, -(SI) mapped_addr);
2112 else
2113 retval = addr;
2114 }
2115 else if (flags & TARGET_MREMAP_MAYMOVE)
2116 {
2117 /* Create a whole new map and copy the contents
2118 block-by-block there. We ignore the new_addr argument
2119 for now. */
2120 char buf[8192];
2121 USI prev_addr = addr;
2122 USI prev_len = old_len;
2123
2124 mapped_addr
2125 = create_map (sd, &current_cpu->highest_mmapped_page,
2126 -1, new_len);
2127
2128 if (mapped_addr > (USI) -8192)
2129 {
2130 retval = -cb_host_to_target_errno (cb, -(SI) new_addr);
2131 break;
2132 }
2133
2134 retval = mapped_addr;
2135
2136 for (; old_len > 0;
2137 old_len -= 8192, mapped_addr += 8192, addr += 8192)
2138 {
2139 if (sim_core_read_buffer (sd, current_cpu, read_map, buf,
2140 addr, 8192) != 8192
2141 || sim_core_write_buffer (sd, current_cpu, 0, buf,
2142 mapped_addr, 8192) != 8192)
2143 abort ();
2144 }
2145
2146 if (unmap_pages (sd, &current_cpu->highest_mmapped_page,
2147 prev_addr, prev_len) != 0)
2148 abort ();
2149 }
2150 else
2151 retval = -cb_host_to_target_errno (cb, -ENOMEM);
2152 break;
2153 }
2154
2155 case TARGET_SYS_poll:
2156 {
2157 int npollfds = arg2;
2158 int timeout = arg3;
2159 SI ufds = arg1;
2160 SI fd = -1;
2161 HI events = -1;
2162 HI revents = 0;
2163 struct stat buf;
2164 int i;
2165
2166 /* The kernel says:
2167 struct pollfd {
2168 int fd;
2169 short events;
2170 short revents;
2171 }; */
2172
2173 /* Check that this is the expected poll call from
2174 linuxthreads/manager.c; we don't support anything else.
2175 Remember, fd == 0 isn't supported. */
2176 if (npollfds != 1
2177 || ((fd = sim_core_read_unaligned_4 (current_cpu, pc,
2178 0, ufds)) <= 0)
2179 || ((events = sim_core_read_unaligned_2 (current_cpu, pc,
2180 0, ufds + 4))
2181 != TARGET_POLLIN)
2182 || ((cb->to_fstat) (cb, fd, &buf) != 0
2183 || (buf.st_mode & S_IFIFO) == 0)
2184 || current_cpu->thread_data == NULL)
2185 {
2186 retval
2187 = cris_unknown_syscall (current_cpu, pc,
2188 "Unimplemented poll syscall "
2189 "(0x%lx: [0x%x, 0x%x, x], "
2190 "0x%lx, 0x%lx)\n",
2191 (unsigned long) arg1, fd, events,
2192 (unsigned long) arg2,
2193 (unsigned long) arg3);
2194 break;
2195 }
2196
2197 retval = 0;
2198
2199 /* Iterate over threads; find a marker that a writer is
2200 sleeping, waiting for a reader. */
2201 for (i = 0; i < SIM_TARGET_MAX_THREADS; i++)
2202 if (current_cpu->thread_data[i].cpu_context != NULL
2203 && current_cpu->thread_data[i].pipe_read_fd == fd)
2204 {
2205 revents = TARGET_POLLIN;
2206 retval = 1;
2207 break;
2208 }
2209
2210 /* Timeout decreases with whatever time passed between the
2211 last syscall and this. That's not exactly right for the
2212 first call, but it's close enough that it isn't
2213 worthwhile to complicate matters by making that a special
2214 case. */
2215 timeout
2216 -= (TARGET_TIME_MS (current_cpu)
2217 - (current_cpu->thread_data[threadno].last_execution));
2218
2219 /* Arrange to repeat this syscall until timeout or event,
2220 decreasing timeout at each iteration. */
2221 if (timeout > 0 && revents == 0)
2222 {
2223 bfd_byte timeout_buf[4];
2224
2225 bfd_putl32 (timeout, timeout_buf);
2226 (*CPU_REG_STORE (current_cpu)) (current_cpu,
2227 H_GR_R12, timeout_buf, 4);
2228 sim_pc_set (current_cpu, pc);
2229 retval = arg1;
2230 break;
2231 }
2232
2233 sim_core_write_unaligned_2 (current_cpu, pc, 0, ufds + 4 + 2,
2234 revents);
2235 break;
2236 }
2237
2238 case TARGET_SYS_time:
2239 {
2240 retval = (int) (*cb->time) (cb);
2241
2242 /* At time of this writing, CB_SYSCALL_time doesn't do the
2243 part of setting *arg1 to the return value. */
2244 if (arg1)
2245 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg1, retval);
2246 break;
2247 }
2248
2249 case TARGET_SYS_gettimeofday:
2250 if (arg1 != 0)
2251 {
2252 USI ts = TARGET_TIME (current_cpu);
2253 USI tms = TARGET_TIME_MS (current_cpu);
2254
2255 /* First dword is seconds since TARGET_EPOCH. */
2256 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg1, ts);
2257
2258 /* Second dword is microseconds. */
2259 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg1 + 4,
2260 (tms % 1000) * 1000);
2261 }
2262 if (arg2 != 0)
2263 {
2264 /* Time-zone info is always cleared. */
2265 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg2, 0);
2266 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg2 + 4, 0);
2267 }
2268 retval = 0;
2269 break;
2270
2271 case TARGET_SYS_llseek:
2272 {
2273 /* If it fits, tweak parameters to fit the "generic" 32-bit
2274 lseek and use that. */
2275 SI fd = arg1;
2276 SI offs_hi = arg2;
2277 SI offs_lo = arg3;
2278 SI resultp = arg4;
2279 SI whence = arg5;
2280 retval = 0;
2281
2282 if (!((offs_hi == 0 && offs_lo >= 0)
2283 || (offs_hi == -1 && offs_lo < 0)))
2284 {
2285 retval
2286 = cris_unknown_syscall (current_cpu, pc,
2287 "Unimplemented llseek offset,"
2288 " fd %d: 0x%x:0x%x\n",
2289 fd, (unsigned) arg2,
2290 (unsigned) arg3);
2291 break;
2292 }
2293
2294 s.func = TARGET_SYS_lseek;
2295 s.arg2 = offs_lo;
2296 s.arg3 = whence;
2297 if (cb_syscall (cb, &s) != CB_RC_OK)
2298 {
2299 sim_io_eprintf (sd, "Break 13: invalid %d? Returned %ld\n", callnum,
2300 s.result);
2301 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped, SIM_SIGILL);
2302 }
2303 if (s.result < 0)
2304 retval = -s.errcode;
2305 else
2306 {
2307 sim_core_write_unaligned_4 (current_cpu, pc, 0, resultp,
2308 s.result);
2309 sim_core_write_unaligned_4 (current_cpu, pc, 0, resultp + 4,
2310 s.result < 0 ? -1 : 0);
2311 }
2312 break;
2313 }
2314
2315 /* ssize_t writev(int fd, const struct iovec *iov, int iovcnt);
2316 where:
2317 struct iovec {
2318 void *iov_base; Starting address
2319 size_t iov_len; Number of bytes to transfer
2320 }; */
2321 case TARGET_SYS_writev:
2322 {
2323 SI fd = arg1;
2324 SI iov = arg2;
2325 SI iovcnt = arg3;
2326 SI retcnt = 0;
2327 int i;
2328
2329 /* We'll ignore strict error-handling and just do multiple write calls. */
2330 for (i = 0; i < iovcnt; i++)
2331 {
2332 int sysret;
2333 USI iov_base
2334 = sim_core_read_unaligned_4 (current_cpu, pc, 0,
2335 iov + 8*i);
2336 USI iov_len
2337 = sim_core_read_unaligned_4 (current_cpu, pc, 0,
2338 iov + 8*i + 4);
2339
2340 s.func = TARGET_SYS_write;
2341 s.arg1 = fd;
2342 s.arg2 = iov_base;
2343 s.arg3 = iov_len;
2344
2345 if (cb_syscall (cb, &s) != CB_RC_OK)
2346 abort ();
2347 sysret = s.result == -1 ? -s.errcode : s.result;
2348
2349 if (sysret != iov_len)
2350 {
2351 if (i != 0)
2352 abort ();
2353 retcnt = sysret;
2354 break;
2355 }
2356
2357 retcnt += iov_len;
2358 }
2359
2360 retval = retcnt;
2361 }
2362 break;
2363
2364 /* This one does have a generic callback function, but at the time
2365 of this writing, cb_syscall does not have code for it, and we
2366 need target-specific code for the threads implementation
2367 anyway. */
2368 case TARGET_SYS_kill:
2369 {
2370 USI pid = arg1;
2371 USI sig = arg2;
2372
2373 retval = 0;
2374
2375 /* At kill(2), glibc sets signal masks such that the thread
2376 machinery is initialized. Still, there is and was only
2377 one thread. */
2378 if (current_cpu->max_threadid == 0)
2379 {
2380 if (pid != TARGET_PID)
2381 {
2382 retval = -cb_host_to_target_errno (cb, EPERM);
2383 break;
2384 }
2385
2386 /* FIXME: Signal infrastructure (target-to-sim mapping). */
2387 if (sig == TARGET_SIGABRT)
2388 /* A call "abort ()", i.e. "kill (getpid(), SIGABRT)" is
2389 the end-point for failing GCC test-cases. */
2390 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
2391 SIM_SIGABRT);
2392 else
2393 {
2394 sim_io_eprintf (sd, "Unimplemented signal: %d\n", sig);
2395 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
2396 SIM_SIGILL);
2397 }
2398
2399 /* This will not be reached. */
2400 abort ();
2401 }
2402 else
2403 retval = deliver_signal (current_cpu, sig, pid);
2404 break;
2405 }
2406
2407 case TARGET_SYS_rt_sigprocmask:
2408 {
2409 int i;
2410 USI how = arg1;
2411 USI newsetp = arg2;
2412 USI oldsetp = arg3;
2413
2414 if (how != TARGET_SIG_BLOCK
2415 && how != TARGET_SIG_SETMASK
2416 && how != TARGET_SIG_UNBLOCK)
2417 {
2418 retval
2419 = cris_unknown_syscall (current_cpu, pc,
2420 "Unimplemented rt_sigprocmask "
2421 "syscall (0x%x, 0x%x, 0x%x)\n",
2422 arg1, arg2, arg3);
2423 break;
2424 }
2425
2426 if (newsetp)
2427 {
2428 USI set_low
2429 = sim_core_read_unaligned_4 (current_cpu, pc, 0,
2430 newsetp);
2431 USI set_high
2432 = sim_core_read_unaligned_4 (current_cpu, pc, 0,
2433 newsetp + 4);
2434
2435 /* The sigmask is kept in the per-thread data, so we may
2436 need to create the first one. */
2437 if (current_cpu->thread_data == NULL)
2438 make_first_thread (current_cpu);
2439
2440 if (how == TARGET_SIG_SETMASK)
2441 for (i = 0; i < 64; i++)
2442 current_cpu->thread_data[threadno].sigdata[i].blocked = 0;
2443
2444 for (i = 0; i < 32; i++)
2445 if ((set_low & (1 << i)))
2446 current_cpu->thread_data[threadno].sigdata[i + 1].blocked
2447 = (how != TARGET_SIG_UNBLOCK);
2448
2449 for (i = 0; i < 31; i++)
2450 if ((set_high & (1 << i)))
2451 current_cpu->thread_data[threadno].sigdata[i + 33].blocked
2452 = (how != TARGET_SIG_UNBLOCK);
2453
2454 /* The mask changed, so a signal may be unblocked for
2455 execution. */
2456 current_cpu->thread_data[threadno].sigpending = 1;
2457 }
2458
2459 if (oldsetp != 0)
2460 {
2461 USI set_low = 0;
2462 USI set_high = 0;
2463
2464 for (i = 0; i < 32; i++)
2465 if (current_cpu->thread_data[threadno]
2466 .sigdata[i + 1].blocked)
2467 set_low |= 1 << i;
2468 for (i = 0; i < 31; i++)
2469 if (current_cpu->thread_data[threadno]
2470 .sigdata[i + 33].blocked)
2471 set_high |= 1 << i;
2472
2473 sim_core_write_unaligned_4 (current_cpu, pc, 0, oldsetp + 0, set_low);
2474 sim_core_write_unaligned_4 (current_cpu, pc, 0, oldsetp + 4, set_high);
2475 }
2476
2477 retval = 0;
2478 break;
2479 }
2480
2481 case TARGET_SYS_sigreturn:
2482 {
2483 int i;
2484 bfd_byte regbuf[4];
2485 int was_sigsuspended;
2486
2487 if (current_cpu->thread_data == NULL
2488 /* The CPU context is saved with the simulator data, not
2489 on the stack as in the real world. */
2490 || (current_cpu->thread_data[threadno].cpu_context_atsignal
2491 == NULL))
2492 {
2493 retval
2494 = cris_unknown_syscall (current_cpu, pc,
2495 "Invalid sigreturn syscall: "
2496 "no signal handler active "
2497 "(0x%lx, 0x%lx, 0x%lx, 0x%lx, "
2498 "0x%lx, 0x%lx)\n",
2499 (unsigned long) arg1,
2500 (unsigned long) arg2,
2501 (unsigned long) arg3,
2502 (unsigned long) arg4,
2503 (unsigned long) arg5,
2504 (unsigned long) arg6);
2505 break;
2506 }
2507
2508 was_sigsuspended
2509 = current_cpu->thread_data[threadno].sigsuspended;
2510
2511 /* Restore the sigmask, either from the stack copy made when
2512 the sighandler was called, or from the saved state
2513 specifically for sigsuspend(2). */
2514 if (was_sigsuspended)
2515 {
2516 current_cpu->thread_data[threadno].sigsuspended = 0;
2517 for (i = 0; i < 64; i++)
2518 current_cpu->thread_data[threadno].sigdata[i].blocked
2519 = current_cpu->thread_data[threadno]
2520 .sigdata[i].blocked_suspendsave;
2521 }
2522 else
2523 {
2524 USI sp;
2525 USI set_low;
2526 USI set_high;
2527
2528 (*CPU_REG_FETCH (current_cpu)) (current_cpu,
2529 H_GR_SP, regbuf, 4);
2530 sp = bfd_getl32 (regbuf);
2531 set_low
2532 = sim_core_read_unaligned_4 (current_cpu, pc, 0, sp);
2533 set_high
2534 = sim_core_read_unaligned_4 (current_cpu, pc, 0, sp + 4);
2535
2536 for (i = 0; i < 32; i++)
2537 current_cpu->thread_data[threadno].sigdata[i + 1].blocked
2538 = (set_low & (1 << i)) != 0;
2539 for (i = 0; i < 31; i++)
2540 current_cpu->thread_data[threadno].sigdata[i + 33].blocked
2541 = (set_high & (1 << i)) != 0;
2542 }
2543
2544 /* The mask changed, so a signal may be unblocked for
2545 execution. */
2546 current_cpu->thread_data[threadno].sigpending = 1;
2547
2548 memcpy (&current_cpu->cpu_data_placeholder,
2549 current_cpu->thread_data[threadno].cpu_context_atsignal,
2550 current_cpu->thread_cpu_data_size);
2551 free (current_cpu->thread_data[threadno].cpu_context_atsignal);
2552 current_cpu->thread_data[threadno].cpu_context_atsignal = NULL;
2553
2554 /* The return value must come from the saved R10. */
2555 (*CPU_REG_FETCH (current_cpu)) (current_cpu, H_GR_R10, regbuf, 4);
2556 retval = bfd_getl32 (regbuf);
2557
2558 /* We must also break the "sigsuspension loop". */
2559 if (was_sigsuspended)
2560 sim_pc_set (current_cpu, sim_pc_get (current_cpu) + 2);
2561 break;
2562 }
2563
2564 case TARGET_SYS_rt_sigsuspend:
2565 {
2566 USI newsetp = arg1;
2567 USI setsize = arg2;
2568
2569 if (setsize != 8)
2570 {
2571 retval
2572 = cris_unknown_syscall (current_cpu, pc,
2573 "Unimplemented rt_sigsuspend syscall"
2574 " arguments (0x%lx, 0x%lx)\n",
2575 (unsigned long) arg1,
2576 (unsigned long) arg2);
2577 break;
2578 }
2579
2580 /* Don't change the signal mask if we're already in
2581 sigsuspend state (i.e. this syscall is a rerun). */
2582 else if (!current_cpu->thread_data[threadno].sigsuspended)
2583 {
2584 USI set_low
2585 = sim_core_read_unaligned_4 (current_cpu, pc, 0,
2586 newsetp);
2587 USI set_high
2588 = sim_core_read_unaligned_4 (current_cpu, pc, 0,
2589 newsetp + 4);
2590 int i;
2591
2592 /* Save the current sigmask and insert the user-supplied
2593 one. */
2594 for (i = 0; i < 32; i++)
2595 {
2596 current_cpu->thread_data[threadno]
2597 .sigdata[i + 1].blocked_suspendsave
2598 = current_cpu->thread_data[threadno]
2599 .sigdata[i + 1].blocked;
2600
2601 current_cpu->thread_data[threadno]
2602 .sigdata[i + 1].blocked = (set_low & (1 << i)) != 0;
2603 }
2604 for (i = 0; i < 31; i++)
2605 {
2606 current_cpu->thread_data[threadno]
2607 .sigdata[i + 33].blocked_suspendsave
2608 = current_cpu->thread_data[threadno]
2609 .sigdata[i + 33].blocked;
2610 current_cpu->thread_data[threadno]
2611 .sigdata[i + 33].blocked = (set_high & (1 << i)) != 0;
2612 }
2613
2614 current_cpu->thread_data[threadno].sigsuspended = 1;
2615
2616 /* The mask changed, so a signal may be unblocked for
2617 execution. */
2618 current_cpu->thread_data[threadno].sigpending = 1;
2619 }
2620
2621 /* Because we don't use arg1 (newsetp) when this syscall is
2622 rerun, it doesn't matter that we overwrite it with the
2623 (constant) return value. */
2624 retval = -cb_host_to_target_errno (cb, EINTR);
2625 sim_pc_set (current_cpu, pc);
2626 break;
2627 }
2628
2629 /* Add case labels here for other syscalls using the 32-bit
2630 "struct stat", provided they have a corresponding simulator
2631 function of course. */
2632 case TARGET_SYS_stat:
2633 case TARGET_SYS_fstat:
2634 {
2635 /* As long as the infrastructure doesn't cache anything
2636 related to the stat mapping, this trick gets us a dual
2637 "struct stat"-type mapping in the least error-prone way. */
2638 const char *saved_map = cb->stat_map;
2639 CB_TARGET_DEFS_MAP *saved_syscall_map = cb->syscall_map;
2640
2641 cb->syscall_map = (CB_TARGET_DEFS_MAP *) syscall_stat32_map;
2642 cb->stat_map = stat32_map;
2643
2644 if (cb_syscall (cb, &s) != CB_RC_OK)
2645 {
2646 abort ();
2647 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
2648 SIM_SIGILL);
2649 }
2650 retval = s.result == -1 ? -s.errcode : s.result;
2651
2652 cb->stat_map = saved_map;
2653 cb->syscall_map = saved_syscall_map;
2654 break;
2655 }
2656
2657 case TARGET_SYS_getcwd:
2658 {
2659 USI buf = arg1;
2660 USI size = arg2;
2661
2662 char *cwd = xmalloc (SIM_PATHMAX);
2663 if (cwd != getcwd (cwd, SIM_PATHMAX))
2664 abort ();
2665
2666 /* FIXME: When and if we support chdir, we need something
2667 a bit more elaborate. */
2668 if (simulator_sysroot[0] != '\0')
2669 strcpy (cwd, "/");
2670
2671 retval = -cb_host_to_target_errno (cb, ERANGE);
2672 if (strlen (cwd) + 1 <= size)
2673 {
2674 retval = strlen (cwd) + 1;
2675 if (sim_core_write_buffer (sd, current_cpu, 0, cwd,
2676 buf, retval)
2677 != (unsigned int) retval)
2678 retval = -cb_host_to_target_errno (cb, EFAULT);
2679 }
2680 free (cwd);
2681 break;
2682 }
2683
2684 case TARGET_SYS_access:
2685 {
2686 SI path = arg1;
2687 SI mode = arg2;
2688 char *pbuf = xmalloc (SIM_PATHMAX);
2689 int i;
2690 int o = 0;
2691 int hmode = 0;
2692
2693 if (sim_core_read_unaligned_1 (current_cpu, pc, 0, path) == '/')
2694 {
2695 strcpy (pbuf, simulator_sysroot);
2696 o += strlen (simulator_sysroot);
2697 }
2698
2699 for (i = 0; i + o < SIM_PATHMAX; i++)
2700 {
2701 pbuf[i + o]
2702 = sim_core_read_unaligned_1 (current_cpu, pc, 0, path + i);
2703 if (pbuf[i + o] == 0)
2704 break;
2705 }
2706
2707 if (i + o == SIM_PATHMAX)
2708 {
2709 retval = -cb_host_to_target_errno (cb, ENAMETOOLONG);
2710 break;
2711 }
2712
2713 /* Assert that we don't get calls for files for which we
2714 don't have support. */
2715 if (strncmp (pbuf + strlen (simulator_sysroot),
2716 "/proc/", 6) == 0)
2717 abort ();
2718 #define X_AFLAG(x) if (mode & TARGET_ ## x) hmode |= x
2719 X_AFLAG (R_OK);
2720 X_AFLAG (W_OK);
2721 X_AFLAG (X_OK);
2722 X_AFLAG (F_OK);
2723 #undef X_AFLAG
2724
2725 if (access (pbuf, hmode) != 0)
2726 retval = -cb_host_to_target_errno (cb, errno);
2727 else
2728 retval = 0;
2729
2730 free (pbuf);
2731 break;
2732 }
2733
2734 case TARGET_SYS_readlink:
2735 {
2736 SI path = arg1;
2737 SI buf = arg2;
2738 SI bufsiz = arg3;
2739 char *pbuf = xmalloc (SIM_PATHMAX);
2740 char *lbuf = xmalloc (SIM_PATHMAX);
2741 char *lbuf_alloc = lbuf;
2742 int nchars = -1;
2743 int i;
2744 int o = 0;
2745
2746 if (sim_core_read_unaligned_1 (current_cpu, pc, 0, path) == '/')
2747 {
2748 strcpy (pbuf, simulator_sysroot);
2749 o += strlen (simulator_sysroot);
2750 }
2751
2752 for (i = 0; i + o < SIM_PATHMAX; i++)
2753 {
2754 pbuf[i + o]
2755 = sim_core_read_unaligned_1 (current_cpu, pc, 0, path + i);
2756 if (pbuf[i + o] == 0)
2757 break;
2758 }
2759
2760 if (i + o == SIM_PATHMAX)
2761 {
2762 retval = -cb_host_to_target_errno (cb, ENAMETOOLONG);
2763 break;
2764 }
2765
2766 /* Intervene calls for certain files expected in the target
2767 proc file system. */
2768 if (strcmp (pbuf + strlen (simulator_sysroot),
2769 "/proc/" XSTRING (TARGET_PID) "/exe") == 0)
2770 {
2771 char *argv0
2772 = (STATE_PROG_ARGV (sd) != NULL
2773 ? *STATE_PROG_ARGV (sd) : NULL);
2774
2775 if (argv0 == NULL || *argv0 == '.')
2776 {
2777 retval
2778 = cris_unknown_syscall (current_cpu, pc,
2779 "Unimplemented readlink syscall "
2780 "(0x%lx: [\"%s\"], 0x%lx)\n",
2781 (unsigned long) arg1, pbuf,
2782 (unsigned long) arg2);
2783 break;
2784 }
2785 else if (*argv0 == '/')
2786 {
2787 if (strncmp (simulator_sysroot, argv0,
2788 strlen (simulator_sysroot)) == 0)
2789 argv0 += strlen (simulator_sysroot);
2790
2791 strcpy (lbuf, argv0);
2792 nchars = strlen (argv0) + 1;
2793 }
2794 else
2795 {
2796 if (getcwd (lbuf, SIM_PATHMAX) != NULL
2797 && strlen (lbuf) + 2 + strlen (argv0) < SIM_PATHMAX)
2798 {
2799 if (strncmp (simulator_sysroot, lbuf,
2800 strlen (simulator_sysroot)) == 0)
2801 lbuf += strlen (simulator_sysroot);
2802
2803 strcat (lbuf, "/");
2804 strcat (lbuf, argv0);
2805 nchars = strlen (lbuf) + 1;
2806 }
2807 else
2808 abort ();
2809 }
2810 }
2811 else
2812 nchars = readlink (pbuf, lbuf, SIM_PATHMAX);
2813
2814 /* We trust that the readlink result returns a *relative*
2815 link, or one already adjusted for the file-path-prefix.
2816 (We can't generally tell the difference, so we go with
2817 the easiest decision; no adjustment.) */
2818
2819 if (nchars == -1)
2820 {
2821 retval = -cb_host_to_target_errno (cb, errno);
2822 break;
2823 }
2824
2825 if (bufsiz < nchars)
2826 nchars = bufsiz;
2827
2828 if (sim_core_write_buffer (sd, current_cpu, write_map, lbuf,
2829 buf, nchars) != (unsigned int) nchars)
2830 retval = -cb_host_to_target_errno (cb, EFAULT);
2831 else
2832 retval = nchars;
2833
2834 free (pbuf);
2835 free (lbuf_alloc);
2836 break;
2837 }
2838
2839 case TARGET_SYS_sched_getscheduler:
2840 {
2841 USI pid = arg1;
2842
2843 /* FIXME: Search (other) existing threads. */
2844 if (pid != 0 && pid != TARGET_PID)
2845 retval = -cb_host_to_target_errno (cb, ESRCH);
2846 else
2847 retval = TARGET_SCHED_OTHER;
2848 break;
2849 }
2850
2851 case TARGET_SYS_sched_getparam:
2852 {
2853 USI pid = arg1;
2854 USI paramp = arg2;
2855
2856 /* The kernel says:
2857 struct sched_param {
2858 int sched_priority;
2859 }; */
2860
2861 if (pid != 0 && pid != TARGET_PID)
2862 retval = -cb_host_to_target_errno (cb, ESRCH);
2863 else
2864 {
2865 /* FIXME: Save scheduler setting before threads are
2866 created too. */
2867 sim_core_write_unaligned_4 (current_cpu, pc, 0, paramp,
2868 current_cpu->thread_data != NULL
2869 ? (current_cpu
2870 ->thread_data[threadno]
2871 .priority)
2872 : 0);
2873 retval = 0;
2874 }
2875 break;
2876 }
2877
2878 case TARGET_SYS_sched_setparam:
2879 {
2880 USI pid = arg1;
2881 USI paramp = arg2;
2882
2883 if ((pid != 0 && pid != TARGET_PID)
2884 || sim_core_read_unaligned_4 (current_cpu, pc, 0,
2885 paramp) != 0)
2886 retval = -cb_host_to_target_errno (cb, EINVAL);
2887 else
2888 retval = 0;
2889 break;
2890 }
2891
2892 case TARGET_SYS_sched_setscheduler:
2893 {
2894 USI pid = arg1;
2895 USI policy = arg2;
2896 USI paramp = arg3;
2897
2898 if ((pid != 0 && pid != TARGET_PID)
2899 || policy != TARGET_SCHED_OTHER
2900 || sim_core_read_unaligned_4 (current_cpu, pc, 0,
2901 paramp) != 0)
2902 retval = -cb_host_to_target_errno (cb, EINVAL);
2903 else
2904 /* FIXME: Save scheduler setting to be read in later
2905 sched_getparam calls. */
2906 retval = 0;
2907 break;
2908 }
2909
2910 case TARGET_SYS_sched_yield:
2911 /* We reschedule to the next thread after a syscall anyway, so
2912 we don't have to do anything here than to set the return
2913 value. */
2914 retval = 0;
2915 break;
2916
2917 case TARGET_SYS_sched_get_priority_min:
2918 case TARGET_SYS_sched_get_priority_max:
2919 if (arg1 != 0)
2920 retval = -cb_host_to_target_errno (cb, EINVAL);
2921 else
2922 retval = 0;
2923 break;
2924
2925 case TARGET_SYS_ugetrlimit:
2926 {
2927 unsigned int curlim, maxlim;
2928 if (arg1 != TARGET_RLIMIT_STACK && arg1 != TARGET_RLIMIT_NOFILE)
2929 {
2930 retval = -cb_host_to_target_errno (cb, EINVAL);
2931 break;
2932 }
2933
2934 /* The kernel says:
2935 struct rlimit {
2936 unsigned long rlim_cur;
2937 unsigned long rlim_max;
2938 }; */
2939 if (arg1 == TARGET_RLIMIT_NOFILE)
2940 {
2941 /* Sadly a very low limit. Better not lie, though. */
2942 maxlim = curlim = MAX_CALLBACK_FDS;
2943 }
2944 else /* arg1 == TARGET_RLIMIT_STACK */
2945 {
2946 maxlim = 0xffffffff;
2947 curlim = 0x800000;
2948 }
2949 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg2, curlim);
2950 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg2 + 4, maxlim);
2951 retval = 0;
2952 break;
2953 }
2954
2955 case TARGET_SYS_setrlimit:
2956 if (arg1 != TARGET_RLIMIT_STACK)
2957 {
2958 retval = -cb_host_to_target_errno (cb, EINVAL);
2959 break;
2960 }
2961 /* FIXME: Save values for future ugetrlimit calls. */
2962 retval = 0;
2963 break;
2964
2965 /* Provide a very limited subset of the sysctl functions, and
2966 abort for the rest. */
2967 case TARGET_SYS__sysctl:
2968 {
2969 /* The kernel says:
2970 struct __sysctl_args {
2971 int *name;
2972 int nlen;
2973 void *oldval;
2974 size_t *oldlenp;
2975 void *newval;
2976 size_t newlen;
2977 unsigned long __unused[4];
2978 }; */
2979 SI name = sim_core_read_unaligned_4 (current_cpu, pc, 0, arg1);
2980 SI name0 = name == 0
2981 ? 0 : sim_core_read_unaligned_4 (current_cpu, pc, 0, name);
2982 SI name1 = name == 0
2983 ? 0 : sim_core_read_unaligned_4 (current_cpu, pc, 0, name + 4);
2984 SI nlen
2985 = sim_core_read_unaligned_4 (current_cpu, pc, 0, arg1 + 4);
2986 SI oldval
2987 = sim_core_read_unaligned_4 (current_cpu, pc, 0, arg1 + 8);
2988 SI oldlenp
2989 = sim_core_read_unaligned_4 (current_cpu, pc, 0, arg1 + 12);
2990 SI oldlen = oldlenp == 0
2991 ? 0 : sim_core_read_unaligned_4 (current_cpu, pc, 0, oldlenp);
2992 SI newval
2993 = sim_core_read_unaligned_4 (current_cpu, pc, 0, arg1 + 16);
2994 SI newlen
2995 = sim_core_read_unaligned_4 (current_cpu, pc, 0, arg1 + 20);
2996
2997 if (name0 == TARGET_CTL_KERN && name1 == TARGET_CTL_KERN_VERSION)
2998 {
2999 SI to_write = oldlen < (SI) sizeof (TARGET_UTSNAME)
3000 ? oldlen : (SI) sizeof (TARGET_UTSNAME);
3001
3002 sim_core_write_unaligned_4 (current_cpu, pc, 0, oldlenp,
3003 sizeof (TARGET_UTSNAME));
3004
3005 if (sim_core_write_buffer (sd, current_cpu, write_map,
3006 TARGET_UTSNAME, oldval,
3007 to_write)
3008 != (unsigned int) to_write)
3009 retval = -cb_host_to_target_errno (cb, EFAULT);
3010 else
3011 retval = 0;
3012 break;
3013 }
3014
3015 retval
3016 = cris_unknown_syscall (current_cpu, pc,
3017 "Unimplemented _sysctl syscall "
3018 "(0x%lx: [0x%lx, 0x%lx],"
3019 " 0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%lx)\n",
3020 (unsigned long) name,
3021 (unsigned long) name0,
3022 (unsigned long) name1,
3023 (unsigned long) nlen,
3024 (unsigned long) oldval,
3025 (unsigned long) oldlenp,
3026 (unsigned long) newval,
3027 (unsigned long) newlen);
3028 break;
3029 }
3030
3031 case TARGET_SYS_exit:
3032 {
3033 /* Here for all but the last thread. */
3034 int i;
3035 int pid
3036 = current_cpu->thread_data[threadno].threadid + TARGET_PID;
3037 int ppid
3038 = (current_cpu->thread_data[threadno].parent_threadid
3039 + TARGET_PID);
3040 int exitsig = current_cpu->thread_data[threadno].exitsig;
3041
3042 /* Any children are now all orphans. */
3043 for (i = 0; i < SIM_TARGET_MAX_THREADS; i++)
3044 if (current_cpu->thread_data[i].parent_threadid
3045 == current_cpu->thread_data[threadno].threadid)
3046 /* Make getppid(2) return 1 for them, poor little ones. */
3047 current_cpu->thread_data[i].parent_threadid = -TARGET_PID + 1;
3048
3049 /* Free the cpu context data. When the parent has received
3050 the exit status, we'll clear the entry too. */
3051 free (current_cpu->thread_data[threadno].cpu_context);
3052 current_cpu->thread_data[threadno].cpu_context = NULL;
3053 current_cpu->m1threads--;
3054 if (arg1 != 0)
3055 {
3056 sim_io_eprintf (sd, "Thread %d exited with status %d\n",
3057 pid, arg1);
3058 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
3059 SIM_SIGILL);
3060 }
3061
3062 /* Still, we may want to support non-zero exit values. */
3063 current_cpu->thread_data[threadno].exitval = arg1 << 8;
3064
3065 if (exitsig)
3066 deliver_signal (current_cpu, exitsig, ppid);
3067 break;
3068 }
3069
3070 case TARGET_SYS_clone:
3071 {
3072 int nthreads = current_cpu->m1threads + 1;
3073 void *thread_cpu_data;
3074 bfd_byte old_sp_buf[4];
3075 bfd_byte sp_buf[4];
3076 const bfd_byte zeros[4] = { 0, 0, 0, 0 };
3077 int i;
3078
3079 /* That's right, the syscall clone arguments are reversed
3080 compared to sys_clone notes in clone(2) and compared to
3081 other Linux ports (i.e. it's the same order as in the
3082 clone(2) libcall). */
3083 USI flags = arg2;
3084 USI newsp = arg1;
3085
3086 if (nthreads == SIM_TARGET_MAX_THREADS)
3087 {
3088 retval = -cb_host_to_target_errno (cb, EAGAIN);
3089 break;
3090 }
3091
3092 /* FIXME: Implement the low byte. */
3093 if ((flags & ~TARGET_CSIGNAL) !=
3094 (TARGET_CLONE_VM
3095 | TARGET_CLONE_FS
3096 | TARGET_CLONE_FILES
3097 | TARGET_CLONE_SIGHAND)
3098 || newsp == 0)
3099 {
3100 retval
3101 = cris_unknown_syscall (current_cpu, pc,
3102 "Unimplemented clone syscall "
3103 "(0x%lx, 0x%lx)\n",
3104 (unsigned long) arg1,
3105 (unsigned long) arg2);
3106 break;
3107 }
3108
3109 if (current_cpu->thread_data == NULL)
3110 make_first_thread (current_cpu);
3111
3112 /* The created thread will get the new SP and a cleared R10.
3113 Since it's created out of a copy of the old thread and we
3114 don't have a set-register-function that just take the
3115 cpu_data as a parameter, we set the childs values first,
3116 and write back or overwrite them in the parent after the
3117 copy. */
3118 (*CPU_REG_FETCH (current_cpu)) (current_cpu,
3119 H_GR_SP, old_sp_buf, 4);
3120 bfd_putl32 (newsp, sp_buf);
3121 (*CPU_REG_STORE (current_cpu)) (current_cpu,
3122 H_GR_SP, sp_buf, 4);
3123 (*CPU_REG_STORE (current_cpu)) (current_cpu,
3124 H_GR_R10, (bfd_byte *) zeros, 4);
3125 thread_cpu_data
3126 = (*current_cpu
3127 ->make_thread_cpu_data) (current_cpu,
3128 &current_cpu->cpu_data_placeholder);
3129 (*CPU_REG_STORE (current_cpu)) (current_cpu,
3130 H_GR_SP, old_sp_buf, 4);
3131
3132 retval = ++current_cpu->max_threadid + TARGET_PID;
3133
3134 /* Find an unused slot. After a few threads have been created
3135 and exited, the array is expected to be a bit fragmented.
3136 We don't reuse the first entry, though, that of the
3137 original thread. */
3138 for (i = 1; i < SIM_TARGET_MAX_THREADS; i++)
3139 if (current_cpu->thread_data[i].cpu_context == NULL
3140 /* Don't reuse a zombied entry. */
3141 && current_cpu->thread_data[i].threadid == 0)
3142 break;
3143
3144 memcpy (&current_cpu->thread_data[i],
3145 &current_cpu->thread_data[threadno],
3146 sizeof (current_cpu->thread_data[i]));
3147 current_cpu->thread_data[i].cpu_context = thread_cpu_data;
3148 current_cpu->thread_data[i].cpu_context_atsignal = NULL;
3149 current_cpu->thread_data[i].threadid = current_cpu->max_threadid;
3150 current_cpu->thread_data[i].parent_threadid
3151 = current_cpu->thread_data[threadno].threadid;
3152 current_cpu->thread_data[i].pipe_read_fd = 0;
3153 current_cpu->thread_data[i].pipe_write_fd = 0;
3154 current_cpu->thread_data[i].at_syscall = 0;
3155 current_cpu->thread_data[i].sigpending = 0;
3156 current_cpu->thread_data[i].sigsuspended = 0;
3157 current_cpu->thread_data[i].exitsig = flags & TARGET_CSIGNAL;
3158 current_cpu->m1threads = nthreads;
3159 break;
3160 }
3161
3162 /* Better watch these in case they do something necessary. */
3163 case TARGET_SYS_socketcall:
3164 retval = -cb_host_to_target_errno (cb, ENOSYS);
3165 break;
3166
3167 case TARGET_SYS_set_thread_area:
3168 /* Do the same error check as Linux. */
3169 if (arg1 & 255)
3170 {
3171 retval = -cb_host_to_target_errno (cb, EINVAL);
3172 break;
3173 }
3174 (*current_cpu->set_target_thread_data) (current_cpu, arg1);
3175 retval = 0;
3176 break;
3177
3178 unimplemented_syscall:
3179 default:
3180 retval
3181 = cris_unknown_syscall (current_cpu, pc,
3182 "Unimplemented syscall: %d "
3183 "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n",
3184 callnum, arg1, arg2, arg3, arg4, arg5,
3185 arg6);
3186 }
3187 }
3188
3189 /* Minimal support for fcntl F_GETFL as used in open+fdopen. */
3190 if (callnum == TARGET_SYS_open)
3191 {
3192 current_cpu->last_open_fd = retval;
3193 current_cpu->last_open_flags = arg2;
3194 }
3195
3196 current_cpu->last_syscall = callnum;
3197
3198 /* A system call is a rescheduling point. For the time being, we don't
3199 reschedule anywhere else. */
3200 if (current_cpu->m1threads != 0
3201 /* We need to schedule off from an exiting thread that is the
3202 second-last one. */
3203 || (current_cpu->thread_data != NULL
3204 && current_cpu->thread_data[threadno].cpu_context == NULL))
3205 {
3206 bfd_byte retval_buf[4];
3207
3208 current_cpu->thread_data[threadno].last_execution
3209 = TARGET_TIME_MS (current_cpu);
3210 bfd_putl32 (retval, retval_buf);
3211 (*CPU_REG_STORE (current_cpu)) (current_cpu, H_GR_R10, retval_buf, 4);
3212
3213 current_cpu->thread_data[threadno].at_syscall = 1;
3214 reschedule (current_cpu);
3215
3216 (*CPU_REG_FETCH (current_cpu)) (current_cpu, H_GR_R10, retval_buf, 4);
3217 retval = bfd_getl32 (retval_buf);
3218 }
3219
3220 return retval;
3221 }
3222
3223 /* Callback from simulator write saying that the pipe at (reader, writer)
3224 is now non-empty (so the writer should wait until the pipe is empty, at
3225 least not write to this or any other pipe). Simplest is to just wait
3226 until the pipe is empty. */
3227
3228 static void
3229 cris_pipe_nonempty (host_callback *cb ATTRIBUTE_UNUSED,
3230 int reader, int writer)
3231 {
3232 SIM_CPU *cpu = current_cpu_for_cb_callback;
3233 const bfd_byte zeros[4] = { 0, 0, 0, 0 };
3234
3235 /* It's the current thread: we just have to re-run the current
3236 syscall instruction (presumably "break 13") and change the syscall
3237 to the special simulator-wait code. Oh, and set a marker that
3238 we're waiting, so we can disambiguate the special call from a
3239 program error.
3240
3241 This function may be called multiple times between cris_pipe_empty,
3242 but we must avoid e.g. decreasing PC every time. Check fd markers
3243 to tell. */
3244 if (cpu->thread_data == NULL)
3245 {
3246 sim_io_eprintf (CPU_STATE (cpu),
3247 "Terminating simulation due to writing pipe rd:wr %d:%d"
3248 " from one single thread\n", reader, writer);
3249 sim_engine_halt (CPU_STATE (cpu), cpu,
3250 NULL, sim_pc_get (cpu), sim_stopped, SIM_SIGILL);
3251 }
3252 else if (cpu->thread_data[cpu->threadno].pipe_write_fd == 0)
3253 {
3254 cpu->thread_data[cpu->threadno].pipe_write_fd = writer;
3255 cpu->thread_data[cpu->threadno].pipe_read_fd = reader;
3256 /* FIXME: We really shouldn't change registers other than R10 in
3257 syscalls (like R9), here or elsewhere. */
3258 (*CPU_REG_STORE (cpu)) (cpu, H_GR_R9, (bfd_byte *) zeros, 4);
3259 sim_pc_set (cpu, sim_pc_get (cpu) - 2);
3260 }
3261 }
3262
3263 /* Callback from simulator close or read call saying that the pipe at
3264 (reader, writer) is now empty (so the writer can write again, perhaps
3265 leave a waiting state). If there are bytes remaining, they couldn't be
3266 consumed (perhaps due to the pipe closing). */
3267
3268 static void
3269 cris_pipe_empty (host_callback *cb,
3270 int reader,
3271 int writer)
3272 {
3273 int i;
3274 SIM_CPU *cpu = current_cpu_for_cb_callback;
3275 SIM_DESC sd = CPU_STATE (current_cpu_for_cb_callback);
3276 bfd_byte r10_buf[4];
3277 int remaining
3278 = cb->pipe_buffer[writer].size - cb->pipe_buffer[reader].size;
3279
3280 /* We need to find the thread that waits for this pipe. */
3281 for (i = 0; i < SIM_TARGET_MAX_THREADS; i++)
3282 if (cpu->thread_data[i].cpu_context
3283 && cpu->thread_data[i].pipe_write_fd == writer)
3284 {
3285 int retval;
3286
3287 /* Temporarily switch to this cpu context, so we can change the
3288 PC by ordinary calls. */
3289
3290 memcpy (cpu->thread_data[cpu->threadno].cpu_context,
3291 &cpu->cpu_data_placeholder,
3292 cpu->thread_cpu_data_size);
3293 memcpy (&cpu->cpu_data_placeholder,
3294 cpu->thread_data[i].cpu_context,
3295 cpu->thread_cpu_data_size);
3296
3297 /* The return value is supposed to contain the number of
3298 written bytes, which is the number of bytes requested and
3299 returned at the write call. You might think the right
3300 thing is to adjust the return-value to be only the
3301 *consumed* number of bytes, but it isn't. We're only
3302 called if the pipe buffer is fully consumed or it is being
3303 closed, possibly with remaining bytes. For the latter
3304 case, the writer is still supposed to see success for
3305 PIPE_BUF bytes (a constant which we happen to know and is
3306 unlikely to change). The return value may also be a
3307 negative number; an error value. This case is covered
3308 because "remaining" is always >= 0. */
3309 (*CPU_REG_FETCH (cpu)) (cpu, H_GR_R10, r10_buf, 4);
3310 retval = (int) bfd_getl_signed_32 (r10_buf);
3311 if (retval - remaining > TARGET_PIPE_BUF)
3312 {
3313 bfd_putl32 (retval - remaining, r10_buf);
3314 (*CPU_REG_STORE (cpu)) (cpu, H_GR_R10, r10_buf, 4);
3315 }
3316 sim_pc_set (cpu, sim_pc_get (cpu) + 2);
3317 memcpy (cpu->thread_data[i].cpu_context,
3318 &cpu->cpu_data_placeholder,
3319 cpu->thread_cpu_data_size);
3320 memcpy (&cpu->cpu_data_placeholder,
3321 cpu->thread_data[cpu->threadno].cpu_context,
3322 cpu->thread_cpu_data_size);
3323 cpu->thread_data[i].pipe_read_fd = 0;
3324 cpu->thread_data[i].pipe_write_fd = 0;
3325 return;
3326 }
3327
3328 abort ();
3329 }
3330
3331 /* We have a simulator-specific notion of time. See TARGET_TIME. */
3332
3333 static int64_t
3334 cris_time (host_callback *cb ATTRIBUTE_UNUSED)
3335 {
3336 return TARGET_TIME (current_cpu_for_cb_callback);
3337 }
3338
3339 static int
3340 cris_getpid (host_callback *cb ATTRIBUTE_UNUSED)
3341 {
3342 return TARGET_PID;
3343 }
3344
3345 /* Set target-specific callback data. */
3346
3347 void
3348 cris_set_callbacks (host_callback *cb)
3349 {
3350 /* Yeargh, have to cast away constness to avoid warnings. */
3351 cb->syscall_map = (CB_TARGET_DEFS_MAP *) syscall_map;
3352 cb->errno_map = (CB_TARGET_DEFS_MAP *) errno_map;
3353
3354 cb->getpid = cris_getpid;
3355
3356 /* The kernel stat64 layout. If we see a file > 2G, the "long"
3357 parameter to cb_store_target_endian will make st_size negative.
3358 Similarly for st_ino. FIXME: Find a 64-bit type, and use it
3359 *unsigned*, and/or add syntax for signed-ness. */
3360 cb->stat_map = stat_map;
3361 cb->open_map = (CB_TARGET_DEFS_MAP *) open_map;
3362 cb->pipe_nonempty = cris_pipe_nonempty;
3363 cb->pipe_empty = cris_pipe_empty;
3364 cb->time = cris_time;
3365 }
3366
3367 /* Process an address exception. */
3368
3369 void
3370 cris_core_signal (SIM_DESC sd, SIM_CPU *current_cpu, sim_cia cia,
3371 unsigned int map, int nr_bytes, address_word addr,
3372 transfer_type transfer, sim_core_signals sig)
3373 {
3374 sim_core_signal (sd, current_cpu, cia, map, nr_bytes, addr,
3375 transfer, sig);
3376 }
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