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