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* cris: New directory, simulator for Axis Communications CRIS
[thirdparty/binutils-gdb.git] / sim / cris / traps.c
1 /* CRIS exception, interrupt, and trap (EIT) support
2 Copyright (C) 2004, 2005 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 2, or (at your option)
10 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 along
18 with this program; if not, write to the Free Software Foundation, Inc.,
19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21 #include "sim-main.h"
22 #include "sim-options.h"
23 #include "targ-vals.h"
24 #include "bfd.h"
25 #ifdef HAVE_ERRNO_H
26 #include <errno.h>
27 #endif
28 #ifdef HAVE_UNISTD_H
29 #include <unistd.h>
30 #endif
31 #ifdef HAVE_FCNTL_H
32 #include <fcntl.h>
33 #endif
34 #ifdef HAVE_SYS_PARAM_H
35 #include <sys/param.h>
36 #endif
37 #ifdef HAVE_SYS_STAT_H
38 #include <sys/stat.h>
39 #endif
40
41 /* The verbatim values are from asm-cris/unistd.h. */
42
43 #define TARGET_SYS_exit 1
44 #define TARGET_SYS_read 3
45 #define TARGET_SYS_write 4
46 #define TARGET_SYS_open 5
47 #define TARGET_SYS_close 6
48 #define TARGET_SYS_unlink 10
49 #define TARGET_SYS_time 13
50 #define TARGET_SYS_lseek 19
51 #define TARGET_SYS_getpid 20
52 #define TARGET_SYS_kill 37
53 #define TARGET_SYS_rename 38
54 #define TARGET_SYS_pipe 42
55 #define TARGET_SYS_brk 45
56 #define TARGET_SYS_ioctl 54
57 #define TARGET_SYS_fcntl 55
58 #define TARGET_SYS_getppid 64
59 #define TARGET_SYS_setrlimit 75
60 #define TARGET_SYS_gettimeofday 78
61 #define TARGET_SYS_readlink 85
62 #define TARGET_SYS_munmap 91
63 #define TARGET_SYS_truncate 92
64 #define TARGET_SYS_ftruncate 93
65 #define TARGET_SYS_socketcall 102
66 #define TARGET_SYS_fstat 108
67 #define TARGET_SYS_wait4 114
68 #define TARGET_SYS_sigreturn 119
69 #define TARGET_SYS_clone 120
70 #define TARGET_SYS_uname 122
71 #define TARGET_SYS_mprotect 125
72 #define TARGET_SYS_llseek 140
73 #define TARGET_SYS__sysctl 149
74 #define TARGET_SYS_sched_setparam 154
75 #define TARGET_SYS_sched_getparam 155
76 #define TARGET_SYS_sched_setscheduler 156
77 #define TARGET_SYS_sched_getscheduler 157
78 #define TARGET_SYS_sched_yield 158
79 #define TARGET_SYS_sched_get_priority_max 159
80 #define TARGET_SYS_sched_get_priority_min 160
81 #define TARGET_SYS_mremap 163
82 #define TARGET_SYS_poll 168
83 #define TARGET_SYS_rt_sigaction 174
84 #define TARGET_SYS_rt_sigprocmask 175
85 #define TARGET_SYS_rt_sigsuspend 179
86 #define TARGET_SYS_getcwd 183
87 #define TARGET_SYS_ugetrlimit 191
88 #define TARGET_SYS_mmap2 192
89 #define TARGET_SYS_stat64 195
90 #define TARGET_SYS_lstat64 196
91 #define TARGET_SYS_fstat64 197
92 #define TARGET_SYS_geteuid32 201
93 #define TARGET_SYS_getuid32 199
94 #define TARGET_SYS_getegid32 202
95 #define TARGET_SYS_getgid32 200
96 #define TARGET_SYS_fcntl64 221
97
98 #define TARGET_PROT_READ 0x1
99 #define TARGET_PROT_WRITE 0x2
100 #define TARGET_PROT_EXEC 0x4
101 #define TARGET_PROT_NONE 0x0
102
103 #define TARGET_MAP_SHARED 0x01
104 #define TARGET_MAP_PRIVATE 0x02
105 #define TARGET_MAP_TYPE 0x0f
106 #define TARGET_MAP_FIXED 0x10
107 #define TARGET_MAP_ANONYMOUS 0x20
108
109 #define TARGET_CTL_KERN 1
110 #define TARGET_CTL_VM 2
111 #define TARGET_CTL_NET 3
112 #define TARGET_CTL_PROC 4
113 #define TARGET_CTL_FS 5
114 #define TARGET_CTL_DEBUG 6
115 #define TARGET_CTL_DEV 7
116 #define TARGET_CTL_BUS 8
117 #define TARGET_CTL_ABI 9
118
119 #define TARGET_CTL_KERN_VERSION 4
120
121 /* linux/mman.h */
122 #define TARGET_MREMAP_MAYMOVE 1
123 #define TARGET_MREMAP_FIXED 2
124
125 #define TARGET_TCGETS 0x5401
126
127 #define TARGET_UTSNAME "#38 Sun Apr 1 00:00:00 MET 2001"
128
129 /* Seconds since the above date + 10 minutes. */
130 #define TARGET_EPOCH 986080200
131
132 /* Milliseconds since start of run. We use the number of syscalls to
133 avoid introducing noise in the execution time. */
134 #define TARGET_TIME_MS(cpu) ((cpu)->syscalls)
135
136 /* Seconds as in time(2). */
137 #define TARGET_TIME(cpu) (TARGET_EPOCH + TARGET_TIME_MS (cpu) / 1000)
138
139 #define TARGET_SCHED_OTHER 0
140
141 #define TARGET_RLIMIT_STACK 3
142 #define TARGET_RLIMIT_NOFILE 7
143
144 #define SIM_TARGET_MAX_THREADS 64
145 #define SIM_MAX_ALLOC_CHUNK (512*1024*1024)
146
147 /* From linux/sched.h. */
148 #define TARGET_CSIGNAL 0x000000ff
149 #define TARGET_CLONE_VM 0x00000100
150 #define TARGET_CLONE_FS 0x00000200
151 #define TARGET_CLONE_FILES 0x00000400
152 #define TARGET_CLONE_SIGHAND 0x00000800
153 #define TARGET_CLONE_PID 0x00001000
154 #define TARGET_CLONE_PTRACE 0x00002000
155 #define TARGET_CLONE_VFORK 0x00004000
156 #define TARGET_CLONE_PARENT 0x00008000
157 #define TARGET_CLONE_THREAD 0x00010000
158 #define TARGET_CLONE_SIGNAL (TARGET_CLONE_SIGHAND | TARGET_CLONE_THREAD)
159
160 /* From asm-cris/poll.h. */
161 #define TARGET_POLLIN 1
162
163 /* From asm-cris/signal.h. */
164 #define TARGET_SIG_BLOCK 0
165 #define TARGET_SIG_UNBLOCK 1
166 #define TARGET_SIG_SETMASK 2
167
168 #define TARGET_SIG_DFL 0
169 #define TARGET_SIG_IGN 1
170 #define TARGET_SIG_ERR ((USI)-1)
171
172 #define TARGET_SIGHUP 1
173 #define TARGET_SIGINT 2
174 #define TARGET_SIGQUIT 3
175 #define TARGET_SIGILL 4
176 #define TARGET_SIGTRAP 5
177 #define TARGET_SIGABRT 6
178 #define TARGET_SIGIOT 6
179 #define TARGET_SIGBUS 7
180 #define TARGET_SIGFPE 8
181 #define TARGET_SIGKILL 9
182 #define TARGET_SIGUSR1 10
183 #define TARGET_SIGSEGV 11
184 #define TARGET_SIGUSR2 12
185 #define TARGET_SIGPIPE 13
186 #define TARGET_SIGALRM 14
187 #define TARGET_SIGTERM 15
188 #define TARGET_SIGSTKFLT 16
189 #define TARGET_SIGCHLD 17
190 #define TARGET_SIGCONT 18
191 #define TARGET_SIGSTOP 19
192 #define TARGET_SIGTSTP 20
193 #define TARGET_SIGTTIN 21
194 #define TARGET_SIGTTOU 22
195 #define TARGET_SIGURG 23
196 #define TARGET_SIGXCPU 24
197 #define TARGET_SIGXFSZ 25
198 #define TARGET_SIGVTALRM 26
199 #define TARGET_SIGPROF 27
200 #define TARGET_SIGWINCH 28
201 #define TARGET_SIGIO 29
202 #define TARGET_SIGPOLL SIGIO
203 /* Actually commented out in the kernel header. */
204 #define TARGET_SIGLOST 29
205 #define TARGET_SIGPWR 30
206 #define TARGET_SIGSYS 31
207
208 /* From include/asm-cris/signal.h. */
209 #define TARGET_SA_NOCLDSTOP 0x00000001
210 #define TARGET_SA_NOCLDWAIT 0x00000002 /* not supported yet */
211 #define TARGET_SA_SIGINFO 0x00000004
212 #define TARGET_SA_ONSTACK 0x08000000
213 #define TARGET_SA_RESTART 0x10000000
214 #define TARGET_SA_NODEFER 0x40000000
215 #define TARGET_SA_RESETHAND 0x80000000
216 #define TARGET_SA_INTERRUPT 0x20000000 /* dummy -- ignored */
217 #define TARGET_SA_RESTORER 0x04000000
218
219 /* From linux/wait.h. */
220 #define TARGET_WNOHANG 1
221 #define TARGET_WUNTRACED 2
222 #define TARGET___WNOTHREAD 0x20000000
223 #define TARGET___WALL 0x40000000
224 #define TARGET___WCLONE 0x80000000
225
226 static const char stat_map[] =
227 "st_dev,2:space,10:space,4:st_mode,4:st_nlink,4:st_uid,4"
228 ":st_gid,4:st_rdev,2:space,10:st_size,8:st_blksize,4:st_blocks,4"
229 ":space,4:st_atime,4:space,4:st_mtime,4:space,4:st_ctime,4:space,4"
230 ":st_ino,8";
231
232 static const CB_TARGET_DEFS_MAP syscall_map[] =
233 {
234 { CB_SYS_open, TARGET_SYS_open },
235 { CB_SYS_close, TARGET_SYS_close },
236 { CB_SYS_read, TARGET_SYS_read },
237 { CB_SYS_write, TARGET_SYS_write },
238 { CB_SYS_lseek, TARGET_SYS_lseek },
239 { CB_SYS_unlink, TARGET_SYS_unlink },
240 { CB_SYS_getpid, TARGET_SYS_getpid },
241 { CB_SYS_fstat, TARGET_SYS_fstat64 },
242 { CB_SYS_lstat, TARGET_SYS_lstat64 },
243 { CB_SYS_stat, TARGET_SYS_stat64 },
244 { CB_SYS_pipe, TARGET_SYS_pipe },
245 { CB_SYS_time, TARGET_SYS_time },
246 { CB_SYS_rename, TARGET_SYS_rename },
247 { CB_SYS_truncate, TARGET_SYS_truncate },
248 { CB_SYS_ftruncate, TARGET_SYS_ftruncate },
249 { 0, -1 }
250 };
251
252 /* An older, 32-bit-only stat mapping. */
253 static const char stat32_map[] =
254 "st_dev,2:space,2:st_ino,4:st_mode,2:st_nlink,2:st_uid,2"
255 ":st_gid,2:st_rdev,2:space,2:st_size,4:st_blksize,4:st_blocks,4"
256 ":st_atime,4:space,4:st_mtime,4:space,4:st_ctime,4:space,12";
257
258 /* Map for calls using the 32-bit struct stat. Primarily used by the
259 newlib Linux mapping. */
260 static const CB_TARGET_DEFS_MAP syscall_stat32_map[] =
261 {
262 { CB_SYS_fstat, TARGET_SYS_fstat },
263 { 0, -1 }
264 };
265
266 /* Giving the true value for the running sim process will lead to
267 non-time-invariant behavior. */
268 #define TARGET_PID 42
269
270 /* Unfortunately, we don't get this from cris.cpu at the moment, and if
271 we did, we'd still don't get a register number with the "16" offset. */
272 #define TARGET_SRP_REGNUM (16+11)
273
274 /* Extracted by applying
275 awk '/^#define/ { printf "#ifdef %s\n { %s, %s },\n#endif\n", $2, $2, $3;}'
276 on .../include/asm/errno.h in a GNU/Linux/CRIS installation and
277 adjusting the synonyms. */
278
279 static const CB_TARGET_DEFS_MAP errno_map[] =
280 {
281 #ifdef EPERM
282 { EPERM, 1 },
283 #endif
284 #ifdef ENOENT
285 { ENOENT, 2 },
286 #endif
287 #ifdef ESRCH
288 { ESRCH, 3 },
289 #endif
290 #ifdef EINTR
291 { EINTR, 4 },
292 #endif
293 #ifdef EIO
294 { EIO, 5 },
295 #endif
296 #ifdef ENXIO
297 { ENXIO, 6 },
298 #endif
299 #ifdef E2BIG
300 { E2BIG, 7 },
301 #endif
302 #ifdef ENOEXEC
303 { ENOEXEC, 8 },
304 #endif
305 #ifdef EBADF
306 { EBADF, 9 },
307 #endif
308 #ifdef ECHILD
309 { ECHILD, 10 },
310 #endif
311 #ifdef EAGAIN
312 { EAGAIN, 11 },
313 #endif
314 #ifdef ENOMEM
315 { ENOMEM, 12 },
316 #endif
317 #ifdef EACCES
318 { EACCES, 13 },
319 #endif
320 #ifdef EFAULT
321 { EFAULT, 14 },
322 #endif
323 #ifdef ENOTBLK
324 { ENOTBLK, 15 },
325 #endif
326 #ifdef EBUSY
327 { EBUSY, 16 },
328 #endif
329 #ifdef EEXIST
330 { EEXIST, 17 },
331 #endif
332 #ifdef EXDEV
333 { EXDEV, 18 },
334 #endif
335 #ifdef ENODEV
336 { ENODEV, 19 },
337 #endif
338 #ifdef ENOTDIR
339 { ENOTDIR, 20 },
340 #endif
341 #ifdef EISDIR
342 { EISDIR, 21 },
343 #endif
344 #ifdef EINVAL
345 { EINVAL, 22 },
346 #endif
347 #ifdef ENFILE
348 { ENFILE, 23 },
349 #endif
350 #ifdef EMFILE
351 { EMFILE, 24 },
352 #endif
353 #ifdef ENOTTY
354 { ENOTTY, 25 },
355 #endif
356 #ifdef ETXTBSY
357 { ETXTBSY, 26 },
358 #endif
359 #ifdef EFBIG
360 { EFBIG, 27 },
361 #endif
362 #ifdef ENOSPC
363 { ENOSPC, 28 },
364 #endif
365 #ifdef ESPIPE
366 { ESPIPE, 29 },
367 #endif
368 #ifdef EROFS
369 { EROFS, 30 },
370 #endif
371 #ifdef EMLINK
372 { EMLINK, 31 },
373 #endif
374 #ifdef EPIPE
375 { EPIPE, 32 },
376 #endif
377 #ifdef EDOM
378 { EDOM, 33 },
379 #endif
380 #ifdef ERANGE
381 { ERANGE, 34 },
382 #endif
383 #ifdef EDEADLK
384 { EDEADLK, 35 },
385 #endif
386 #ifdef ENAMETOOLONG
387 { ENAMETOOLONG, 36 },
388 #endif
389 #ifdef ENOLCK
390 { ENOLCK, 37 },
391 #endif
392 #ifdef ENOSYS
393 { ENOSYS, 38 },
394 #endif
395 #ifdef ENOTEMPTY
396 { ENOTEMPTY, 39 },
397 #endif
398 #ifdef ELOOP
399 { ELOOP, 40 },
400 #endif
401 #ifdef EWOULDBLOCK
402 { EWOULDBLOCK, 11 },
403 #endif
404 #ifdef ENOMSG
405 { ENOMSG, 42 },
406 #endif
407 #ifdef EIDRM
408 { EIDRM, 43 },
409 #endif
410 #ifdef ECHRNG
411 { ECHRNG, 44 },
412 #endif
413 #ifdef EL2NSYNC
414 { EL2NSYNC, 45 },
415 #endif
416 #ifdef EL3HLT
417 { EL3HLT, 46 },
418 #endif
419 #ifdef EL3RST
420 { EL3RST, 47 },
421 #endif
422 #ifdef ELNRNG
423 { ELNRNG, 48 },
424 #endif
425 #ifdef EUNATCH
426 { EUNATCH, 49 },
427 #endif
428 #ifdef ENOCSI
429 { ENOCSI, 50 },
430 #endif
431 #ifdef EL2HLT
432 { EL2HLT, 51 },
433 #endif
434 #ifdef EBADE
435 { EBADE, 52 },
436 #endif
437 #ifdef EBADR
438 { EBADR, 53 },
439 #endif
440 #ifdef EXFULL
441 { EXFULL, 54 },
442 #endif
443 #ifdef ENOANO
444 { ENOANO, 55 },
445 #endif
446 #ifdef EBADRQC
447 { EBADRQC, 56 },
448 #endif
449 #ifdef EBADSLT
450 { EBADSLT, 57 },
451 #endif
452 #ifdef EDEADLOCK
453 { EDEADLOCK, 35 },
454 #endif
455 #ifdef EBFONT
456 { EBFONT, 59 },
457 #endif
458 #ifdef ENOSTR
459 { ENOSTR, 60 },
460 #endif
461 #ifdef ENODATA
462 { ENODATA, 61 },
463 #endif
464 #ifdef ETIME
465 { ETIME, 62 },
466 #endif
467 #ifdef ENOSR
468 { ENOSR, 63 },
469 #endif
470 #ifdef ENONET
471 { ENONET, 64 },
472 #endif
473 #ifdef ENOPKG
474 { ENOPKG, 65 },
475 #endif
476 #ifdef EREMOTE
477 { EREMOTE, 66 },
478 #endif
479 #ifdef ENOLINK
480 { ENOLINK, 67 },
481 #endif
482 #ifdef EADV
483 { EADV, 68 },
484 #endif
485 #ifdef ESRMNT
486 { ESRMNT, 69 },
487 #endif
488 #ifdef ECOMM
489 { ECOMM, 70 },
490 #endif
491 #ifdef EPROTO
492 { EPROTO, 71 },
493 #endif
494 #ifdef EMULTIHOP
495 { EMULTIHOP, 72 },
496 #endif
497 #ifdef EDOTDOT
498 { EDOTDOT, 73 },
499 #endif
500 #ifdef EBADMSG
501 { EBADMSG, 74 },
502 #endif
503 #ifdef EOVERFLOW
504 { EOVERFLOW, 75 },
505 #endif
506 #ifdef ENOTUNIQ
507 { ENOTUNIQ, 76 },
508 #endif
509 #ifdef EBADFD
510 { EBADFD, 77 },
511 #endif
512 #ifdef EREMCHG
513 { EREMCHG, 78 },
514 #endif
515 #ifdef ELIBACC
516 { ELIBACC, 79 },
517 #endif
518 #ifdef ELIBBAD
519 { ELIBBAD, 80 },
520 #endif
521 #ifdef ELIBSCN
522 { ELIBSCN, 81 },
523 #endif
524 #ifdef ELIBMAX
525 { ELIBMAX, 82 },
526 #endif
527 #ifdef ELIBEXEC
528 { ELIBEXEC, 83 },
529 #endif
530 #ifdef EILSEQ
531 { EILSEQ, 84 },
532 #endif
533 #ifdef ERESTART
534 { ERESTART, 85 },
535 #endif
536 #ifdef ESTRPIPE
537 { ESTRPIPE, 86 },
538 #endif
539 #ifdef EUSERS
540 { EUSERS, 87 },
541 #endif
542 #ifdef ENOTSOCK
543 { ENOTSOCK, 88 },
544 #endif
545 #ifdef EDESTADDRREQ
546 { EDESTADDRREQ, 89 },
547 #endif
548 #ifdef EMSGSIZE
549 { EMSGSIZE, 90 },
550 #endif
551 #ifdef EPROTOTYPE
552 { EPROTOTYPE, 91 },
553 #endif
554 #ifdef ENOPROTOOPT
555 { ENOPROTOOPT, 92 },
556 #endif
557 #ifdef EPROTONOSUPPORT
558 { EPROTONOSUPPORT, 93 },
559 #endif
560 #ifdef ESOCKTNOSUPPORT
561 { ESOCKTNOSUPPORT, 94 },
562 #endif
563 #ifdef EOPNOTSUPP
564 { EOPNOTSUPP, 95 },
565 #endif
566 #ifdef EPFNOSUPPORT
567 { EPFNOSUPPORT, 96 },
568 #endif
569 #ifdef EAFNOSUPPORT
570 { EAFNOSUPPORT, 97 },
571 #endif
572 #ifdef EADDRINUSE
573 { EADDRINUSE, 98 },
574 #endif
575 #ifdef EADDRNOTAVAIL
576 { EADDRNOTAVAIL, 99 },
577 #endif
578 #ifdef ENETDOWN
579 { ENETDOWN, 100 },
580 #endif
581 #ifdef ENETUNREACH
582 { ENETUNREACH, 101 },
583 #endif
584 #ifdef ENETRESET
585 { ENETRESET, 102 },
586 #endif
587 #ifdef ECONNABORTED
588 { ECONNABORTED, 103 },
589 #endif
590 #ifdef ECONNRESET
591 { ECONNRESET, 104 },
592 #endif
593 #ifdef ENOBUFS
594 { ENOBUFS, 105 },
595 #endif
596 #ifdef EISCONN
597 { EISCONN, 106 },
598 #endif
599 #ifdef ENOTCONN
600 { ENOTCONN, 107 },
601 #endif
602 #ifdef ESHUTDOWN
603 { ESHUTDOWN, 108 },
604 #endif
605 #ifdef ETOOMANYREFS
606 { ETOOMANYREFS, 109 },
607 #endif
608 #ifdef ETIMEDOUT
609 { ETIMEDOUT, 110 },
610 #endif
611 #ifdef ECONNREFUSED
612 { ECONNREFUSED, 111 },
613 #endif
614 #ifdef EHOSTDOWN
615 { EHOSTDOWN, 112 },
616 #endif
617 #ifdef EHOSTUNREACH
618 { EHOSTUNREACH, 113 },
619 #endif
620 #ifdef EALREADY
621 { EALREADY, 114 },
622 #endif
623 #ifdef EINPROGRESS
624 { EINPROGRESS, 115 },
625 #endif
626 #ifdef ESTALE
627 { ESTALE, 116 },
628 #endif
629 #ifdef EUCLEAN
630 { EUCLEAN, 117 },
631 #endif
632 #ifdef ENOTNAM
633 { ENOTNAM, 118 },
634 #endif
635 #ifdef ENAVAIL
636 { ENAVAIL, 119 },
637 #endif
638 #ifdef EISNAM
639 { EISNAM, 120 },
640 #endif
641 #ifdef EREMOTEIO
642 { EREMOTEIO, 121 },
643 #endif
644 #ifdef EDQUOT
645 { EDQUOT, 122 },
646 #endif
647 #ifdef ENOMEDIUM
648 { ENOMEDIUM, 123 },
649 #endif
650 #ifdef EMEDIUMTYPE
651 { EMEDIUMTYPE, 124 },
652 #endif
653 { 0, -1 }
654 };
655
656 /* Extracted by applying
657 perl -ne 'if ($_ =~ /^#define/) { split;
658 printf "#ifdef $_[1]\n { %s, 0x%x },\n#endif\n",
659 $_[1], $_[2] =~ /^0/ ? oct($_[2]) : $_[2];}'
660 on pertinent parts of .../include/asm/fcntl.h in a GNU/Linux/CRIS
661 installation and removing synonyms and unnecessary items. Don't
662 forget the end-marker. */
663
664 static const CB_TARGET_DEFS_MAP open_map[] = {
665 #ifdef O_ACCMODE
666 { O_ACCMODE, 0x3 },
667 #endif
668 #ifdef O_RDONLY
669 { O_RDONLY, 0x0 },
670 #endif
671 #ifdef O_WRONLY
672 { O_WRONLY, 0x1 },
673 #endif
674 #ifdef O_RDWR
675 { O_RDWR, 0x2 },
676 #endif
677 #ifdef O_CREAT
678 { O_CREAT, 0x40 },
679 #endif
680 #ifdef O_EXCL
681 { O_EXCL, 0x80 },
682 #endif
683 #ifdef O_NOCTTY
684 { O_NOCTTY, 0x100 },
685 #endif
686 #ifdef O_TRUNC
687 { O_TRUNC, 0x200 },
688 #endif
689 #ifdef O_APPEND
690 { O_APPEND, 0x400 },
691 #endif
692 #ifdef O_NONBLOCK
693 { O_NONBLOCK, 0x800 },
694 #endif
695 #ifdef O_NDELAY
696 { O_NDELAY, 0x0 },
697 #endif
698 #ifdef O_SYNC
699 { O_SYNC, 0x1000 },
700 #endif
701 #ifdef FASYNC
702 { FASYNC, 0x2000 },
703 #endif
704 #ifdef O_DIRECT
705 { O_DIRECT, 0x4000 },
706 #endif
707 #ifdef O_LARGEFILE
708 { O_LARGEFILE, 0x8000 },
709 #endif
710 #ifdef O_DIRECTORY
711 { O_DIRECTORY, 0x10000 },
712 #endif
713 #ifdef O_NOFOLLOW
714 { O_NOFOLLOW, 0x20000 },
715 #endif
716 { -1, -1 }
717 };
718
719 /* Needed for the cris_pipe_nonempty and cris_pipe_empty syscalls. */
720 static SIM_CPU *current_cpu_for_cb_callback;
721
722 static int syscall_read_mem (host_callback *, struct cb_syscall *,
723 unsigned long, char *, int);
724 static int syscall_write_mem (host_callback *, struct cb_syscall *,
725 unsigned long, const char *, int);
726 static USI create_map (SIM_DESC, struct cris_sim_mmapped_page **,
727 USI addr, USI len);
728 static USI unmap_pages (SIM_DESC, struct cris_sim_mmapped_page **,
729 USI addr, USI len);
730 static USI is_mapped (SIM_DESC, struct cris_sim_mmapped_page **,
731 USI addr, USI len);
732 static void dump_statistics (SIM_CPU *current_cpu);
733 static void make_first_thread (SIM_CPU *current_cpu);
734
735 /* Read/write functions for system call interface. */
736
737 static int
738 syscall_read_mem (host_callback *cb ATTRIBUTE_UNUSED,
739 struct cb_syscall *sc,
740 unsigned long taddr, char *buf, int bytes)
741 {
742 SIM_DESC sd = (SIM_DESC) sc->p1;
743 SIM_CPU *cpu = (SIM_CPU *) sc->p2;
744
745 return sim_core_read_buffer (sd, cpu, read_map, buf, taddr, bytes);
746 }
747
748 static int
749 syscall_write_mem (host_callback *cb ATTRIBUTE_UNUSED,
750 struct cb_syscall *sc,
751 unsigned long taddr, const char *buf, int bytes)
752 {
753 SIM_DESC sd = (SIM_DESC) sc->p1;
754 SIM_CPU *cpu = (SIM_CPU *) sc->p2;
755
756 return sim_core_write_buffer (sd, cpu, write_map, buf, taddr, bytes);
757 }
758
759 /* When we risk running self-modified code (as in trampolines), this is
760 called from special-case insns. The silicon CRIS CPU:s have enough
761 cache snooping implemented making this a simulator-only issue. Tests:
762 gcc.c-torture/execute/931002-1.c execution, -O3 -g
763 gcc.c-torture/execute/931002-1.c execution, -O3 -fomit-frame-pointer. */
764
765 void
766 cris_flush_simulator_decode_cache (SIM_CPU *current_cpu,
767 USI pc ATTRIBUTE_UNUSED)
768 {
769 SIM_DESC sd = CPU_STATE (current_cpu);
770
771 #if WITH_SCACHE
772 if (USING_SCACHE_P (sd))
773 scache_flush_cpu (current_cpu);
774 #endif
775 }
776
777 /* Output statistics at the end of a run. */
778 static void
779 dump_statistics (SIM_CPU *current_cpu)
780 {
781 SIM_DESC sd = CPU_STATE (current_cpu);
782 CRIS_MISC_PROFILE *profp
783 = CPU_CRIS_MISC_PROFILE (current_cpu);
784 unsigned64 total = profp->basic_cycle_count;
785 const char *textmsg = "Basic clock cycles, total @: %llu\n";
786
787 /* The --cris-stats={basic|unaligned|schedulable|all} counts affect
788 what's included in the "total" count only. */
789 switch (CPU_CRIS_MISC_PROFILE (current_cpu)->flags
790 & FLAG_CRIS_MISC_PROFILE_ALL)
791 {
792 case FLAG_CRIS_MISC_PROFILE_SIMPLE:
793 break;
794
795 case (FLAG_CRIS_MISC_PROFILE_UNALIGNED | FLAG_CRIS_MISC_PROFILE_SIMPLE):
796 textmsg
797 = "Clock cycles including stall cycles for unaligned accesses @: %llu\n";
798 total += profp->unaligned_mem_dword_count;
799 break;
800
801 case (FLAG_CRIS_MISC_PROFILE_SCHEDULABLE | FLAG_CRIS_MISC_PROFILE_SIMPLE):
802 textmsg = "Schedulable clock cycles, total @: %llu\n";
803 total
804 += (profp->memsrc_stall_count
805 + profp->memraw_stall_count
806 + profp->movemsrc_stall_count
807 + profp->movemdst_stall_count
808 + profp->mulsrc_stall_count
809 + profp->jumpsrc_stall_count
810 + profp->unaligned_mem_dword_count);
811 break;
812
813 case FLAG_CRIS_MISC_PROFILE_ALL:
814 textmsg = "All accounted clock cycles, total @: %llu\n";
815 total
816 += (profp->memsrc_stall_count
817 + profp->memraw_stall_count
818 + profp->movemsrc_stall_count
819 + profp->movemdst_stall_count
820 + profp->movemaddr_stall_count
821 + profp->mulsrc_stall_count
822 + profp->jumpsrc_stall_count
823 + profp->branch_stall_count
824 + profp->jumptarget_stall_count
825 + profp->unaligned_mem_dword_count);
826 break;
827
828 default:
829 abort ();
830
831 sim_io_eprintf (sd,
832 "Internal inconsistency at %s:%d",
833 __FILE__, __LINE__);
834 sim_engine_halt (sd, current_cpu, NULL, 0,
835 sim_stopped, SIM_SIGILL);
836 }
837
838 /* Historically, these messages have gone to stderr, so we'll keep it
839 that way. It's also easier to then tell it from normal program
840 output. FIXME: Add redirect option like "run -e file". */
841 sim_io_eprintf (sd, textmsg, total);
842
843 /* For v32, unaligned_mem_dword_count should always be 0. For
844 v10, memsrc_stall_count should always be 0. */
845 sim_io_eprintf (sd, "Memory source stall cycles: %lld\n",
846 profp->memsrc_stall_count
847 + profp->unaligned_mem_dword_count);
848 sim_io_eprintf (sd, "Memory read-after-write stall cycles: %lld\n",
849 profp->memraw_stall_count);
850 sim_io_eprintf (sd, "Movem source stall cycles: %lld\n",
851 profp->movemsrc_stall_count);
852 sim_io_eprintf (sd, "Movem destination stall cycles: %lld\n",
853 profp->movemdst_stall_count);
854 sim_io_eprintf (sd, "Movem address stall cycles: %lld\n",
855 profp->movemaddr_stall_count);
856 sim_io_eprintf (sd, "Multiplication source stall cycles: %lld\n",
857 profp->mulsrc_stall_count);
858 sim_io_eprintf (sd, "Jump source stall cycles: %lld\n",
859 profp->jumpsrc_stall_count);
860 sim_io_eprintf (sd, "Branch misprediction stall cycles: %lld\n",
861 profp->branch_stall_count);
862 sim_io_eprintf (sd, "Jump target stall cycles: %lld\n",
863 profp->jumptarget_stall_count);
864 }
865
866 /* Check whether any part of [addr .. addr + len - 1] is already mapped.
867 Return 1 if a overlap detected, 0 otherwise. */
868
869 static USI
870 is_mapped (SIM_DESC sd ATTRIBUTE_UNUSED,
871 struct cris_sim_mmapped_page **rootp,
872 USI addr, USI len)
873 {
874 struct cris_sim_mmapped_page *mapp;
875
876 if (len == 0 || (len & 8191))
877 abort ();
878
879 /* Iterate over the reverse-address sorted pages until we find a page in
880 or lower than the checked area. */
881 for (mapp = *rootp; mapp != NULL && mapp->addr >= addr; mapp = mapp->prev)
882 if (mapp->addr < addr + len && mapp->addr >= addr)
883 return 1;
884
885 return 0;
886 }
887
888 /* Create mmapped memory. */
889
890 static USI
891 create_map (SIM_DESC sd, struct cris_sim_mmapped_page **rootp, USI addr,
892 USI len)
893 {
894 struct cris_sim_mmapped_page *mapp;
895 struct cris_sim_mmapped_page **higher_prevp = rootp;
896 USI new_addr = 0x40000000;
897
898 if (addr != 0)
899 new_addr = addr;
900 else if (*rootp)
901 new_addr = rootp[0]->addr + 8192;
902
903 if (len != 8192)
904 {
905 USI page_addr;
906
907 if (len & 8191)
908 /* Which is better: return an error for this, or just round it up? */
909 abort ();
910
911 /* Do a recursive call for each page in the request. */
912 for (page_addr = new_addr; len != 0; page_addr += 8192, len -= 8192)
913 if (create_map (sd, rootp, page_addr, 8192) >= (USI) -8191)
914 abort ();
915
916 return new_addr;
917 }
918
919 for (mapp = *rootp;
920 mapp != NULL && mapp->addr > new_addr;
921 mapp = mapp->prev)
922 higher_prevp = &mapp->prev;
923
924 /* Allocate the new page, on the next higher page from the last one
925 allocated, and link in the new descriptor before previous ones. */
926 mapp = malloc (sizeof (*mapp));
927
928 if (mapp == NULL)
929 return (USI) -ENOMEM;
930
931 sim_core_attach (sd, NULL, 0, access_read_write_exec, 0,
932 new_addr, len,
933 0, NULL, NULL);
934
935 mapp->addr = new_addr;
936 mapp->prev = *higher_prevp;
937 *higher_prevp = mapp;
938
939 return new_addr;
940 }
941
942 /* Unmap one or more pages. */
943
944 static USI
945 unmap_pages (SIM_DESC sd, struct cris_sim_mmapped_page **rootp, USI addr,
946 USI len)
947 {
948 struct cris_sim_mmapped_page *mapp;
949 struct cris_sim_mmapped_page **higher_prevp = rootp;
950
951 if (len != 8192)
952 {
953 USI page_addr;
954
955 if (len & 8191)
956 /* Which is better: return an error for this, or just round it up? */
957 abort ();
958
959 /* Loop backwards to make each call is O(1) over the number of pages
960 allocated, if we're unmapping from the high end of the pages. */
961 for (page_addr = addr + len - 8192;
962 page_addr >= addr;
963 page_addr -= 8192)
964 if (unmap_pages (sd, rootp, page_addr, 8192) != 0)
965 abort ();
966
967 return 0;
968 }
969
970 for (mapp = *rootp; mapp != NULL && mapp->addr > addr; mapp = mapp->prev)
971 higher_prevp = &mapp->prev;
972
973 if (mapp == NULL || mapp->addr != addr)
974 return EINVAL;
975
976 *higher_prevp = mapp->prev;
977 sim_core_detach (sd, NULL, 0, 0, addr);
978 free (mapp);
979 return 0;
980 }
981
982 /* The semantic code invokes this for illegal (unrecognized) instructions. */
983
984 SEM_PC
985 sim_engine_invalid_insn (SIM_CPU *current_cpu, IADDR cia, SEM_PC vpc)
986 {
987 SIM_DESC sd = CPU_STATE (current_cpu);
988
989 sim_engine_halt (sd, current_cpu, NULL, cia, sim_stopped, SIM_SIGILL);
990 return vpc;
991 }
992
993 /* Handlers from the CGEN description that should not be called. */
994
995 USI
996 cris_bmod_handler (SIM_CPU *current_cpu ATTRIBUTE_UNUSED,
997 UINT srcreg ATTRIBUTE_UNUSED,
998 USI dstreg ATTRIBUTE_UNUSED)
999 {
1000 abort ();
1001 }
1002
1003 void
1004 h_supr_set_handler (SIM_CPU *current_cpu ATTRIBUTE_UNUSED,
1005 UINT index ATTRIBUTE_UNUSED,
1006 USI page ATTRIBUTE_UNUSED,
1007 USI newval ATTRIBUTE_UNUSED)
1008 {
1009 abort ();
1010 }
1011
1012 USI
1013 h_supr_get_handler (SIM_CPU *current_cpu ATTRIBUTE_UNUSED,
1014 UINT index ATTRIBUTE_UNUSED,
1015 USI page ATTRIBUTE_UNUSED)
1016 {
1017 abort ();
1018 }
1019
1020 /* Swap one context for another. */
1021
1022 static void
1023 schedule (SIM_CPU *current_cpu, int next)
1024 {
1025 /* Need to mark context-switches in the trace output. */
1026 if ((CPU_CRIS_MISC_PROFILE (current_cpu)->flags
1027 & FLAG_CRIS_MISC_PROFILE_XSIM_TRACE))
1028 cris_trace_printf (CPU_STATE (current_cpu), current_cpu,
1029 "\t#:%d\n", next);
1030
1031 /* Copy the current context (if there is one) to its slot. */
1032 if (current_cpu->thread_data[current_cpu->threadno].cpu_context)
1033 memcpy (current_cpu->thread_data[current_cpu->threadno].cpu_context,
1034 &current_cpu->cpu_data_placeholder,
1035 current_cpu->thread_cpu_data_size);
1036
1037 /* Copy the new context from its slot. */
1038 memcpy (&current_cpu->cpu_data_placeholder,
1039 current_cpu->thread_data[next].cpu_context,
1040 current_cpu->thread_cpu_data_size);
1041
1042 /* Update needed stuff to indicate the new context. */
1043 current_cpu->threadno = next;
1044
1045 /* Handle pending signals. */
1046 if (current_cpu->thread_data[next].sigpending
1047 /* We don't run nested signal handlers. This means that pause(2)
1048 and sigsuspend(2) do not work in sighandlers, but that
1049 shouldn't be too hard a restriction. It also greatly
1050 simplifies the code. */
1051 && current_cpu->thread_data[next].cpu_context_atsignal == NULL)
1052 {
1053 int sig;
1054
1055 /* See if there's really a pending, non-blocked handler. We don't
1056 queue signals, so just use the first one in ascending order. */
1057 for (sig = 0; sig < 64; sig++)
1058 if (current_cpu->thread_data[next].sigdata[sig].pending
1059 && !current_cpu->thread_data[next].sigdata[sig].blocked)
1060 {
1061 bfd_byte regbuf[4];
1062 USI sp;
1063 int i;
1064 USI blocked;
1065 USI pc = sim_pc_get (current_cpu);
1066
1067 /* It's simpler to save the CPU context inside the simulator
1068 than on the stack. */
1069 current_cpu->thread_data[next].cpu_context_atsignal
1070 = (*current_cpu
1071 ->make_thread_cpu_data) (current_cpu,
1072 current_cpu->thread_data[next]
1073 .cpu_context);
1074
1075 (*CPU_REG_FETCH (current_cpu)) (current_cpu, H_GR_SP, regbuf, 4);
1076 sp = bfd_getl32 (regbuf);
1077
1078 /* Make sure we have an aligned stack. */
1079 sp &= ~3;
1080
1081 /* Make room for the signal frame, aligned. FIXME: Check that
1082 the memory exists, map it in if absent. (BTW, should also
1083 implement on-access automatic stack allocation). */
1084 sp -= 20;
1085
1086 /* This isn't the same signal frame as the kernel uses, because
1087 we don't want to bother getting all registers on and off the
1088 stack. */
1089
1090 /* First, we store the currently blocked signals. */
1091 blocked = 0;
1092 for (i = 0; i < 32; i++)
1093 blocked
1094 |= current_cpu->thread_data[next].sigdata[i + 1].blocked << i;
1095 sim_core_write_aligned_4 (current_cpu, pc, 0, sp, blocked);
1096 blocked = 0;
1097 for (i = 0; i < 31; i++)
1098 blocked
1099 |= current_cpu->thread_data[next].sigdata[i + 33].blocked << i;
1100 sim_core_write_aligned_4 (current_cpu, pc, 0, sp + 4, blocked);
1101
1102 /* Then, the actual instructions. This is CPU-specific, but we
1103 use instructions from the common subset for v10 and v32 which
1104 should be safe for the time being but could be parametrized
1105 if need be. */
1106 /* MOVU.W [PC+],R9. */
1107 sim_core_write_aligned_2 (current_cpu, pc, 0, sp + 8, 0x9c5f);
1108 /* .WORD TARGET_SYS_sigreturn. */
1109 sim_core_write_aligned_2 (current_cpu, pc, 0, sp + 10,
1110 TARGET_SYS_sigreturn);
1111 /* BREAK 13. */
1112 sim_core_write_aligned_2 (current_cpu, pc, 0, sp + 12, 0xe93d);
1113
1114 /* NOP (on v32; it's SETF on v10, but is the correct compatible
1115 instruction. Still, it doesn't matter because v10 has no
1116 delay slot for BREAK so it will not be executed). */
1117 sim_core_write_aligned_2 (current_cpu, pc, 0, sp + 16, 0x05b0);
1118
1119 /* Modify registers to hold the right values for the sighandler
1120 context: updated stackpointer and return address pointing to
1121 the sigreturn stub. */
1122 bfd_putl32 (sp, regbuf);
1123 (*CPU_REG_STORE (current_cpu)) (current_cpu, H_GR_SP, regbuf, 4);
1124 bfd_putl32 (sp + 8, regbuf);
1125 (*CPU_REG_STORE (current_cpu)) (current_cpu, TARGET_SRP_REGNUM,
1126 regbuf, 4);
1127
1128 current_cpu->thread_data[next].sigdata[sig].pending = 0;
1129
1130 /* Block this signal (for the duration of the sighandler). */
1131 current_cpu->thread_data[next].sigdata[sig].blocked = 1;
1132
1133 sim_pc_set (current_cpu, current_cpu->sighandler[sig]);
1134 bfd_putl32 (sig, regbuf);
1135 (*CPU_REG_STORE (current_cpu)) (current_cpu, H_GR_R10,
1136 regbuf, 4);
1137
1138 /* We ignore a SA_SIGINFO flag in the sigaction call; the code I
1139 needed all this for, specifies a SA_SIGINFO call but treats it
1140 like an ordinary sighandler; only the signal number argument is
1141 inspected. To make future need to implement SA_SIGINFO
1142 correctly possible, we set the siginfo argument register to a
1143 magic (hopefully non-address) number. (NB: then, you should
1144 just need to pass the siginfo argument; it seems you probably
1145 don't need to implement the specific rt_sigreturn.) */
1146 bfd_putl32 (0xbad5161f, regbuf);
1147 (*CPU_REG_STORE (current_cpu)) (current_cpu, H_GR_R11,
1148 regbuf, 4);
1149
1150 /* The third argument is unused and the kernel sets it to 0. */
1151 bfd_putl32 (0, regbuf);
1152 (*CPU_REG_STORE (current_cpu)) (current_cpu, H_GR_R12,
1153 regbuf, 4);
1154 return;
1155 }
1156
1157 /* No, there actually was no pending signal for this thread. Reset
1158 this flag. */
1159 current_cpu->thread_data[next].sigpending = 0;
1160 }
1161 }
1162
1163 /* Reschedule the simplest possible way until something else is absolutely
1164 necessary:
1165 - A. Find the next process (round-robin) that doesn't have at_syscall
1166 set, schedule it.
1167 - B. If there is none, just run the next process, round-robin.
1168 - Clear at_syscall for the current process. */
1169
1170 static void
1171 reschedule (SIM_CPU *current_cpu)
1172 {
1173 int i;
1174
1175 /* Iterate over all thread slots, because after a few thread creations
1176 and exits, we don't know where the live ones are. */
1177 for (i = (current_cpu->threadno + 1) % SIM_TARGET_MAX_THREADS;
1178 i != current_cpu->threadno;
1179 i = (i + 1) % SIM_TARGET_MAX_THREADS)
1180 if (current_cpu->thread_data[i].cpu_context
1181 && current_cpu->thread_data[i].at_syscall == 0)
1182 {
1183 schedule (current_cpu, i);
1184 return;
1185 }
1186
1187 /* Pick any next live thread. */
1188 for (i = (current_cpu->threadno + 1) % SIM_TARGET_MAX_THREADS;
1189 i != current_cpu->threadno;
1190 i = (i + 1) % SIM_TARGET_MAX_THREADS)
1191 if (current_cpu->thread_data[i].cpu_context)
1192 {
1193 schedule (current_cpu, i);
1194 return;
1195 }
1196
1197 /* More than one live thread, but we couldn't find the next one? */
1198 abort ();
1199 }
1200
1201 /* Set up everything to receive (or IGN) an incoming signal to the
1202 current context. */
1203
1204 static int
1205 deliver_signal (SIM_CPU *current_cpu, int sig, unsigned int pid)
1206 {
1207 int i;
1208 USI pc = sim_pc_get (current_cpu);
1209
1210 /* Find the thread index of the pid. */
1211 for (i = 0; i < SIM_TARGET_MAX_THREADS; i++)
1212 /* Apparently it's ok to send signals to zombies (so a check for
1213 current_cpu->thread_data[i].cpu_context != NULL would be
1214 wrong). */
1215 if (current_cpu->thread_data[i].threadid == pid - TARGET_PID)
1216 {
1217 if (sig < 64)
1218 switch (current_cpu->sighandler[sig])
1219 {
1220 case TARGET_SIG_DFL:
1221 switch (sig)
1222 {
1223 /* The following according to the glibc
1224 documentation. (The kernel code has non-obvious
1225 execution paths.) */
1226 case TARGET_SIGFPE:
1227 case TARGET_SIGILL:
1228 case TARGET_SIGSEGV:
1229 case TARGET_SIGBUS:
1230 case TARGET_SIGABRT:
1231 case TARGET_SIGTRAP:
1232 case TARGET_SIGSYS:
1233
1234 case TARGET_SIGTERM:
1235 case TARGET_SIGINT:
1236 case TARGET_SIGQUIT:
1237 case TARGET_SIGKILL:
1238 case TARGET_SIGHUP:
1239
1240 case TARGET_SIGALRM:
1241 case TARGET_SIGVTALRM:
1242 case TARGET_SIGPROF:
1243 case TARGET_SIGSTOP:
1244
1245 case TARGET_SIGPIPE:
1246 case TARGET_SIGLOST:
1247 case TARGET_SIGXCPU:
1248 case TARGET_SIGXFSZ:
1249 case TARGET_SIGUSR1:
1250 case TARGET_SIGUSR2:
1251 sim_io_eprintf (CPU_STATE (current_cpu),
1252 "Exiting pid %d due to signal %d\n",
1253 pid, sig);
1254 sim_engine_halt (CPU_STATE (current_cpu), current_cpu,
1255 NULL, pc, sim_stopped,
1256 sig == TARGET_SIGABRT
1257 ? SIM_SIGABRT : SIM_SIGILL);
1258 return 0;
1259
1260 /* The default for all other signals is to be ignored. */
1261 default:
1262 return 0;
1263 }
1264
1265 case TARGET_SIG_IGN:
1266 switch (sig)
1267 {
1268 case TARGET_SIGKILL:
1269 case TARGET_SIGSTOP:
1270 /* Can't ignore these signals. */
1271 sim_io_eprintf (CPU_STATE (current_cpu),
1272 "Exiting pid %d due to signal %d\n",
1273 pid, sig);
1274 sim_engine_halt (CPU_STATE (current_cpu), current_cpu,
1275 NULL, pc, sim_stopped, SIM_SIGILL);
1276 return 0;
1277
1278 default:
1279 return 0;
1280 }
1281 break;
1282
1283 default:
1284 /* Mark the signal as pending, making schedule () check
1285 closer. The signal will be handled when the thread is
1286 scheduled and the signal is unblocked. */
1287 current_cpu->thread_data[i].sigdata[sig].pending = 1;
1288 current_cpu->thread_data[i].sigpending = 1;
1289 return 0;
1290 }
1291 else
1292 {
1293 sim_io_eprintf (CPU_STATE (current_cpu),
1294 "Unimplemented signal: %d\n", sig);
1295 sim_engine_halt (CPU_STATE (current_cpu), current_cpu, NULL, pc,
1296 sim_stopped, SIM_SIGILL);
1297 }
1298 }
1299
1300 return
1301 -cb_host_to_target_errno (STATE_CALLBACK (CPU_STATE (current_cpu)),
1302 ESRCH);
1303 }
1304
1305 /* Make the vector and the first item, the main thread. */
1306
1307 static void
1308 make_first_thread (SIM_CPU *current_cpu)
1309 {
1310 current_cpu->thread_data
1311 = xcalloc (1,
1312 SIM_TARGET_MAX_THREADS
1313 * sizeof (current_cpu->thread_data[0]));
1314 current_cpu->thread_data[0].cpu_context
1315 = (*current_cpu->make_thread_cpu_data) (current_cpu,
1316 &current_cpu
1317 ->cpu_data_placeholder);
1318 current_cpu->thread_data[0].parent_threadid = -1;
1319
1320 /* For good measure. */
1321 if (TARGET_SIG_DFL != 0)
1322 abort ();
1323 }
1324
1325 /* Main function: the handler of the "break 13" syscall insn. */
1326
1327 USI
1328 cris_break_13_handler (SIM_CPU *current_cpu, USI callnum, USI arg1,
1329 USI arg2, USI arg3, USI arg4, USI arg5, USI arg6,
1330 USI pc)
1331 {
1332 CB_SYSCALL s;
1333 SIM_DESC sd = CPU_STATE (current_cpu);
1334 host_callback *cb = STATE_CALLBACK (sd);
1335 int retval;
1336 int threadno = current_cpu->threadno;
1337
1338 current_cpu->syscalls++;
1339
1340 CB_SYSCALL_INIT (&s);
1341 s.func = callnum;
1342 s.arg1 = arg1;
1343 s.arg2 = arg2;
1344 s.arg3 = arg3;
1345
1346 if (callnum == TARGET_SYS_exit && current_cpu->m1threads == 0)
1347 {
1348 if (CPU_CRIS_MISC_PROFILE (current_cpu)->flags
1349 & FLAG_CRIS_MISC_PROFILE_ALL)
1350 dump_statistics (current_cpu);
1351 sim_engine_halt (sd, current_cpu, NULL, pc, sim_exited, arg1);
1352 }
1353
1354 s.p1 = (PTR) sd;
1355 s.p2 = (PTR) current_cpu;
1356 s.read_mem = syscall_read_mem;
1357 s.write_mem = syscall_write_mem;
1358
1359 current_cpu_for_cb_callback = current_cpu;
1360
1361 if (cb_syscall (cb, &s) != CB_RC_OK)
1362 {
1363 abort ();
1364 sim_io_eprintf (sd, "Break 13: invalid %d? Returned %ld\n", callnum,
1365 s.result);
1366 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped, SIM_SIGILL);
1367 }
1368
1369 retval = s.result == -1 ? -s.errcode : s.result;
1370
1371 if (s.errcode != 0 && s.errcode == cb_host_to_target_errno (cb, ENOSYS))
1372 {
1373 /* If the generic simulator call said ENOSYS, then let's try the
1374 ones we know ourselves.
1375
1376 The convention is to provide *very limited* functionality on an
1377 as-needed basis, only what's covered by the test-suite, tests
1378 added when functionality changes and abort with a descriptive
1379 message for *everything* else. Where there's no test-case, we
1380 just abort. */
1381 switch (callnum)
1382 {
1383 case 0:
1384 /* It's a pretty safe bet that the "old setup() system call"
1385 number will not be re-used; we can't say the same for higher
1386 numbers. We treat this simulator-generated call as "wait
1387 forever"; we re-run this insn. The wait is ended by a
1388 callback. Sanity check that this is the reason we got
1389 here. */
1390 if (current_cpu->thread_data == NULL
1391 || (current_cpu->thread_data[threadno].pipe_write_fd == 0))
1392 goto unimplemented_syscall;
1393
1394 sim_pc_set (current_cpu, pc);
1395 retval = arg1;
1396 break;
1397
1398 case TARGET_SYS_fcntl64:
1399 case TARGET_SYS_fcntl:
1400 if (arg2 == 1)
1401 {
1402 /* F_GETFD.
1403 Glibc checks stdin, stdout and stderr fd:s for
1404 close-on-exec security sanity. We just need to provide a
1405 OK return value. If we really need to have a
1406 close-on-exec flag true, we could just do a real fcntl
1407 here. */
1408 retval = 0;
1409 }
1410 else if (arg2 == 2)
1411 {
1412 /* F_SETFD. Just ignore attempts to set the close-on-exec
1413 flag. */
1414 retval = 0;
1415 }
1416 break;
1417
1418 case TARGET_SYS_uname:
1419 {
1420 /* Fill in a few constants to appease glibc. */
1421 static const char sim_utsname[6][65] =
1422 {
1423 "Linux",
1424 "sim-target",
1425 "2.4.5",
1426 TARGET_UTSNAME,
1427 "cris",
1428 "localdomain"
1429 };
1430
1431 if ((s.write_mem) (cb, &s, arg1, (const char *) sim_utsname,
1432 sizeof (sim_utsname))
1433 != sizeof (sim_utsname))
1434 retval = -cb_host_to_target_errno (cb, EFAULT);
1435 else
1436 retval = 0;
1437 break;
1438 }
1439
1440 case TARGET_SYS_geteuid32:
1441 /* We tell the truth with these. Maybe we shouldn't, but it
1442 should match the "stat" information. */
1443 retval = geteuid ();
1444 break;
1445
1446 case TARGET_SYS_getuid32:
1447 retval = getuid ();
1448 break;
1449
1450 case TARGET_SYS_getegid32:
1451 retval = getegid ();
1452 break;
1453
1454 case TARGET_SYS_getgid32:
1455 retval = getgid ();
1456 break;
1457
1458 case TARGET_SYS_brk:
1459 /* Most often, we just return the argument, like the Linux
1460 kernel. */
1461 retval = arg1;
1462
1463 if (arg1 == 0)
1464 retval = current_cpu->endbrk;
1465 else if (arg1 <= current_cpu->endmem)
1466 current_cpu->endbrk = arg1;
1467 else
1468 {
1469 USI new_end = (arg1 + 8191) & ~8191;
1470
1471 /* If the simulator wants to brk more than a certain very
1472 large amount, something is wrong. FIXME: Return an error
1473 or abort? Have command-line selectable? */
1474 if (new_end - current_cpu->endmem > SIM_MAX_ALLOC_CHUNK)
1475 {
1476 current_cpu->endbrk = current_cpu->endmem;
1477 retval = current_cpu->endmem;
1478 break;
1479 }
1480
1481 sim_core_attach (sd, NULL, 0, access_read_write_exec, 0,
1482 current_cpu->endmem,
1483 new_end - current_cpu->endmem,
1484 0, NULL, NULL);
1485 current_cpu->endbrk = arg1;
1486 current_cpu->endmem = new_end;
1487 }
1488 break;
1489
1490 case TARGET_SYS_getpid:
1491 /* Correct until CLONE_THREAD is implemented. */
1492 retval = current_cpu->thread_data == NULL
1493 ? TARGET_PID
1494 : TARGET_PID + current_cpu->thread_data[threadno].threadid;
1495 break;
1496
1497 case TARGET_SYS_getppid:
1498 /* Correct until CLONE_THREAD is implemented. */
1499 retval = current_cpu->thread_data == NULL
1500 ? TARGET_PID - 1
1501 : (TARGET_PID
1502 + current_cpu->thread_data[threadno].parent_threadid);
1503 break;
1504
1505 case TARGET_SYS_mmap2:
1506 {
1507 USI addr = arg1;
1508 USI len = arg2;
1509 USI prot = arg3;
1510 USI flags = arg4;
1511 USI fd = arg5;
1512 USI pgoff = arg6;
1513
1514 /* If the simulator wants to mmap more than the very large
1515 limit, something is wrong. FIXME: Return an error or
1516 abort? Have command-line selectable? */
1517 if (len > SIM_MAX_ALLOC_CHUNK)
1518 {
1519 retval = -cb_host_to_target_errno (cb, ENOMEM);
1520 break;
1521 }
1522
1523 if ((prot != (TARGET_PROT_READ | TARGET_PROT_WRITE)
1524 && (prot
1525 != (TARGET_PROT_READ
1526 | TARGET_PROT_WRITE
1527 | TARGET_PROT_EXEC))
1528 && prot != TARGET_PROT_READ)
1529 || (flags != (TARGET_MAP_ANONYMOUS | TARGET_MAP_PRIVATE)
1530 && flags != TARGET_MAP_PRIVATE
1531 && flags != TARGET_MAP_SHARED)
1532 || (fd != (USI) -1 && prot != TARGET_PROT_READ)
1533 || pgoff != 0
1534 || ((len & 8191) != 0 && fd == (USI) -1))
1535 {
1536 sim_io_eprintf (sd, "Unimplemented mmap2 call "
1537 "(0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%lx)\n",
1538 (unsigned long) arg1,
1539 (unsigned long) arg2,
1540 (unsigned long) arg3,
1541 (unsigned long) arg4,
1542 (unsigned long) arg5,
1543 (unsigned long) arg6);
1544 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
1545 SIM_SIGILL);
1546 break;
1547 }
1548 else if (fd != (USI) -1)
1549 {
1550 /* Map a file. */
1551
1552 USI newaddr;
1553 USI pos;
1554
1555 /* A non-aligned argument is allowed for files. */
1556 USI newlen = (len + 8191) & ~8191;
1557
1558 /* We only support read, which we should already have
1559 checked. Check again anyway. */
1560 if (prot != TARGET_PROT_READ)
1561 abort ();
1562
1563 newaddr
1564 = create_map (sd, &current_cpu->highest_mmapped_page, addr,
1565 newlen);
1566
1567 if (newaddr >= (USI) -8191)
1568 {
1569 abort ();
1570 retval = -cb_host_to_target_errno (cb, -(SI) newaddr);
1571 break;
1572 }
1573
1574 /* Find the current position in the file. */
1575 s.func = TARGET_SYS_lseek;
1576 s.arg1 = fd;
1577 s.arg2 = 0;
1578 s.arg3 = SEEK_CUR;
1579 if (cb_syscall (cb, &s) != CB_RC_OK)
1580 abort ();
1581 pos = s.result;
1582
1583 if (s.result < 0)
1584 abort ();
1585
1586 /* Use the standard read callback to read in "len"
1587 bytes. */
1588 s.func = TARGET_SYS_read;
1589 s.arg1 = fd;
1590 s.arg2 = newaddr;
1591 s.arg3 = len;
1592 if (cb_syscall (cb, &s) != CB_RC_OK)
1593 abort ();
1594
1595 if ((USI) s.result != len)
1596 abort ();
1597
1598 /* After reading, we need to go back to the previous
1599 position in the file. */
1600 s.func = TARGET_SYS_lseek;
1601 s.arg1 = fd;
1602 s.arg2 = pos;
1603 s.arg3 = SEEK_SET;
1604 if (cb_syscall (cb, &s) != CB_RC_OK)
1605 abort ();
1606 if (pos != (USI) s.result)
1607 abort ();
1608
1609 retval = newaddr;
1610 }
1611 else
1612 {
1613 USI newaddr
1614 = create_map (sd, &current_cpu->highest_mmapped_page, addr, len);
1615
1616 if (newaddr >= (USI) -8191)
1617 retval = -cb_host_to_target_errno (cb, -(SI) newaddr);
1618 else
1619 retval = newaddr;
1620 }
1621 break;
1622 }
1623
1624 case TARGET_SYS_mprotect:
1625 {
1626 /* We only cover the case of linuxthreads mprotecting out its
1627 stack guard page. */
1628 USI addr = arg1;
1629 USI len = arg2;
1630 USI prot = arg3;
1631
1632 if ((addr & 8191) != 0
1633 || len != 8192
1634 || prot != TARGET_PROT_NONE
1635 || !is_mapped (sd, &current_cpu->highest_mmapped_page, addr,
1636 len))
1637 {
1638 sim_io_eprintf (sd, "Unimplemented mprotect call "
1639 "(0x%lx, 0x%lx, 0x%lx)\n",
1640 (unsigned long) arg1,
1641 (unsigned long) arg2,
1642 (unsigned long) arg3);
1643 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
1644 SIM_SIGILL);
1645 break;
1646 }
1647
1648 /* FIXME: We should account for pages like this that are
1649 "mprotected out". For now, we just tell the simulator
1650 core to remove that page from its map. */
1651 sim_core_detach (sd, NULL, 0, 0, addr);
1652 retval = 0;
1653 break;
1654 }
1655
1656 case TARGET_SYS_ioctl:
1657 {
1658 /* We support only a very limited functionality: checking
1659 stdout with TCGETS to perform the isatty function. The
1660 TCGETS ioctl isn't actually performed or the result used by
1661 an isatty () caller in a "hello, world" program; only the
1662 return value is then used. Maybe we shouldn't care about
1663 the environment of the simulator regarding isatty, but
1664 that's been working before, in the xsim simulator. */
1665 if (arg2 == TARGET_TCGETS && arg1 == 1)
1666 retval = isatty (1) ? 0 : cb_host_to_target_errno (cb, EINVAL);
1667 else
1668 retval = -cb_host_to_target_errno (cb, EINVAL);
1669 break;
1670 }
1671
1672 case TARGET_SYS_munmap:
1673 {
1674 USI addr = arg1;
1675 USI len = arg2;
1676 USI result
1677 = unmap_pages (sd, &current_cpu->highest_mmapped_page, addr,
1678 len);
1679 retval = result != 0 ? -cb_host_to_target_errno (cb, result) : 0;
1680 break;
1681 }
1682
1683 case TARGET_SYS_wait4:
1684 {
1685 int i;
1686 USI pid = arg1;
1687 USI saddr = arg2;
1688 USI options = arg3;
1689 USI rusagep = arg4;
1690
1691 /* FIXME: We're not properly implementing __WCLONE, and we
1692 don't really need the special casing so we might as well
1693 make this general. */
1694 if ((!(pid == (USI) -1
1695 && options == (TARGET___WCLONE | TARGET_WNOHANG)
1696 && saddr != 0)
1697 && !(pid > 0
1698 && (options == TARGET___WCLONE
1699 || options == TARGET___WALL)))
1700 || rusagep != 0
1701 || current_cpu->thread_data == NULL)
1702 {
1703 sim_io_eprintf (sd, "Unimplemented wait4 call "
1704 "(0x%lx, 0x%lx, 0x%lx, 0x%lx)\n",
1705 (unsigned long) arg1,
1706 (unsigned long) arg2,
1707 (unsigned long) arg3,
1708 (unsigned long) arg4);
1709 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
1710 SIM_SIGILL);
1711 break;
1712 }
1713
1714 if (pid == (USI) -1)
1715 for (i = 1; i < SIM_TARGET_MAX_THREADS; i++)
1716 {
1717 if (current_cpu->thread_data[threadno].threadid
1718 == current_cpu->thread_data[i].parent_threadid
1719 && current_cpu->thread_data[i].threadid != 0
1720 && current_cpu->thread_data[i].cpu_context == NULL)
1721 {
1722 /* A zombied child. Get the exit value and clear the
1723 zombied entry so it will be reused. */
1724 sim_core_write_unaligned_4 (current_cpu, pc, 0, saddr,
1725 current_cpu
1726 ->thread_data[i].exitval);
1727 retval
1728 = current_cpu->thread_data[i].threadid + TARGET_PID;
1729 memset (&current_cpu->thread_data[i], 0,
1730 sizeof (current_cpu->thread_data[i]));
1731 goto outer_break;
1732 }
1733 }
1734 else
1735 {
1736 /* We're waiting for a specific PID. If we don't find
1737 it zombied on this run, rerun the syscall. */
1738 for (i = 1; i < SIM_TARGET_MAX_THREADS; i++)
1739 if (pid == current_cpu->thread_data[i].threadid + TARGET_PID
1740 && current_cpu->thread_data[i].cpu_context == NULL)
1741 {
1742 if (saddr != 0)
1743 /* Get the exit value if the caller wants it. */
1744 sim_core_write_unaligned_4 (current_cpu, pc, 0,
1745 saddr,
1746 current_cpu
1747 ->thread_data[i]
1748 .exitval);
1749
1750 retval
1751 = current_cpu->thread_data[i].threadid + TARGET_PID;
1752 memset (&current_cpu->thread_data[i], 0,
1753 sizeof (current_cpu->thread_data[i]));
1754
1755 goto outer_break;
1756 }
1757
1758 sim_pc_set (current_cpu, pc);
1759 }
1760
1761 retval = -cb_host_to_target_errno (cb, ECHILD);
1762 outer_break:
1763 break;
1764 }
1765
1766 case TARGET_SYS_rt_sigaction:
1767 {
1768 USI signum = arg1;
1769 USI old_sa = arg3;
1770 USI new_sa = arg2;
1771
1772 /* The kernel says:
1773 struct sigaction {
1774 __sighandler_t sa_handler;
1775 unsigned long sa_flags;
1776 void (*sa_restorer)(void);
1777 sigset_t sa_mask;
1778 }; */
1779
1780 if (old_sa != 0)
1781 {
1782 sim_core_write_unaligned_4 (current_cpu, pc, 0, old_sa + 0,
1783 current_cpu->sighandler[signum]);
1784 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg3 + 4, 0);
1785 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg3 + 8, 0);
1786
1787 /* We'll assume _NSIG_WORDS is 2 for the kernel. */
1788 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg3 + 12, 0);
1789 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg3 + 16, 0);
1790 }
1791 if (new_sa != 0)
1792 {
1793 USI sa_handler
1794 = sim_core_read_unaligned_4 (current_cpu, pc, 0, new_sa);
1795 USI sa_flags
1796 = sim_core_read_unaligned_4 (current_cpu, pc, 0, new_sa + 4);
1797 USI sa_restorer
1798 = sim_core_read_unaligned_4 (current_cpu, pc, 0, new_sa + 8);
1799 USI sa_mask_low
1800 = sim_core_read_unaligned_4 (current_cpu, pc, 0, new_sa + 12);
1801 USI sa_mask_high
1802 = sim_core_read_unaligned_4 (current_cpu, pc, 0, new_sa + 16);
1803
1804 /* We won't interrupt a syscall so we won't restart it,
1805 but a signal(2) call ends up syscalling rt_sigaction
1806 with this flag, so we have to handle it. The
1807 sa_restorer field contains garbage when not
1808 TARGET_SA_RESTORER, so don't look at it. For the
1809 time being, we don't nest sighandlers, so we
1810 ignore the sa_mask, which simplifies things. */
1811 if ((sa_flags != 0
1812 && sa_flags != TARGET_SA_RESTART
1813 && sa_flags != (TARGET_SA_RESTART|TARGET_SA_SIGINFO))
1814 || sa_handler == 0)
1815 {
1816 sim_io_eprintf (sd, "Unimplemented rt_sigaction "
1817 "syscall (0x%lx, "
1818 "0x%lx: [0x%x, 0x%x, 0x%x, "
1819 "{0x%x, 0x%x}], "
1820 "0x%lx)\n",
1821 (unsigned long) arg1,
1822 (unsigned long) arg2,
1823 sa_handler, sa_flags, sa_restorer,
1824 sa_mask_low, sa_mask_high,
1825 (unsigned long) arg3);
1826 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
1827 SIM_SIGILL);
1828 }
1829
1830 current_cpu->sighandler[signum] = sa_handler;
1831
1832 /* Because we may have unblocked signals, one may now be
1833 pending, if there are threads, that is. */
1834 if (current_cpu->thread_data)
1835 current_cpu->thread_data[threadno].sigpending = 1;
1836 }
1837 retval = 0;
1838 break;
1839 }
1840
1841 case TARGET_SYS_mremap:
1842 {
1843 USI addr = arg1;
1844 USI old_len = arg2;
1845 USI new_len = arg3;
1846 USI flags = arg4;
1847 USI new_addr = arg5;
1848 USI mapped_addr;
1849
1850 if (new_len == old_len)
1851 /* The program and/or library is possibly confused but
1852 this is a valid call. Happens with ipps-1.40 on file
1853 svs_all. */
1854 retval = addr;
1855 else if (new_len < old_len)
1856 {
1857 /* Shrinking is easy. */
1858 if (unmap_pages (sd, &current_cpu->highest_mmapped_page,
1859 addr + new_len, old_len - new_len) != 0)
1860 retval = -cb_host_to_target_errno (cb, EINVAL);
1861 else
1862 retval = addr;
1863 }
1864 else if (! is_mapped (sd, &current_cpu->highest_mmapped_page,
1865 addr + old_len, new_len - old_len))
1866 {
1867 /* If the extension isn't mapped, we can just add it. */
1868 mapped_addr
1869 = create_map (sd, &current_cpu->highest_mmapped_page,
1870 addr + old_len, new_len - old_len);
1871
1872 if (mapped_addr > (USI) -8192)
1873 retval = -cb_host_to_target_errno (cb, -(SI) mapped_addr);
1874 else
1875 retval = addr;
1876 }
1877 else if (flags & TARGET_MREMAP_MAYMOVE)
1878 {
1879 /* Create a whole new map and copy the contents
1880 block-by-block there. We ignore the new_addr argument
1881 for now. */
1882 char buf[8192];
1883 USI prev_addr = addr;
1884 USI prev_len = old_len;
1885
1886 mapped_addr
1887 = create_map (sd, &current_cpu->highest_mmapped_page,
1888 0, new_len);
1889
1890 if (mapped_addr > (USI) -8192)
1891 {
1892 retval = -cb_host_to_target_errno (cb, -(SI) new_addr);
1893 break;
1894 }
1895
1896 retval = mapped_addr;
1897
1898 for (; old_len > 0;
1899 old_len -= 8192, mapped_addr += 8192, addr += 8192)
1900 {
1901 if (sim_core_read_buffer (sd, current_cpu, read_map, buf,
1902 addr, 8192) != 8192
1903 || sim_core_write_buffer (sd, current_cpu, 0, buf,
1904 mapped_addr, 8192) != 8192)
1905 abort ();
1906 }
1907
1908 if (unmap_pages (sd, &current_cpu->highest_mmapped_page,
1909 prev_addr, prev_len) != 0)
1910 abort ();
1911 }
1912 else
1913 retval = -cb_host_to_target_errno (cb, -ENOMEM);
1914 break;
1915 }
1916
1917 case TARGET_SYS_poll:
1918 {
1919 int npollfds = arg2;
1920 int timeout = arg3;
1921 SI ufds = arg1;
1922 SI fd = -1;
1923 HI events = -1;
1924 HI revents = 0;
1925 struct stat buf;
1926 int i;
1927
1928 /* The kernel says:
1929 struct pollfd {
1930 int fd;
1931 short events;
1932 short revents;
1933 }; */
1934
1935 /* Check that this is the expected poll call from
1936 linuxthreads/manager.c; we don't support anything else.
1937 Remember, fd == 0 isn't supported. */
1938 if (npollfds != 1
1939 || ((fd = sim_core_read_unaligned_4 (current_cpu, pc,
1940 0, ufds)) <= 0)
1941 || ((events = sim_core_read_unaligned_2 (current_cpu, pc,
1942 0, ufds + 4))
1943 != TARGET_POLLIN)
1944 || ((cb->fstat) (cb, fd, &buf) != 0
1945 || (buf.st_mode & S_IFIFO) == 0)
1946 || current_cpu->thread_data == NULL)
1947 {
1948 sim_io_eprintf (sd, "Unimplemented poll syscall "
1949 "(0x%lx: [0x%x, 0x%x, x], 0x%lx, 0x%lx)\n",
1950 (unsigned long) arg1, fd, events,
1951 (unsigned long) arg2, (unsigned long) arg3);
1952 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped, SIM_SIGILL);
1953 break;
1954 }
1955
1956 retval = 0;
1957
1958 /* Iterate over threads; find a marker that a writer is
1959 sleeping, waiting for a reader. */
1960 for (i = 0; i < SIM_TARGET_MAX_THREADS; i++)
1961 if (current_cpu->thread_data[i].cpu_context != NULL
1962 && current_cpu->thread_data[i].pipe_read_fd == fd)
1963 {
1964 revents = TARGET_POLLIN;
1965 retval = 1;
1966 break;
1967 }
1968
1969 /* Timeout decreases with whatever time passed between the
1970 last syscall and this. That's not exactly right for the
1971 first call, but it's close enough that it isn't
1972 worthwhile to complicate matters by making that a special
1973 case. */
1974 timeout
1975 -= (TARGET_TIME_MS (current_cpu)
1976 - (current_cpu->thread_data[threadno].last_execution));
1977
1978 /* Arrange to repeat this syscall until timeout or event,
1979 decreasing timeout at each iteration. */
1980 if (timeout > 0 && revents == 0)
1981 {
1982 bfd_byte timeout_buf[4];
1983
1984 bfd_putl32 (timeout, timeout_buf);
1985 (*CPU_REG_STORE (current_cpu)) (current_cpu,
1986 H_GR_R12, timeout_buf, 4);
1987 sim_pc_set (current_cpu, pc);
1988 retval = arg1;
1989 break;
1990 }
1991
1992 sim_core_write_unaligned_2 (current_cpu, pc, 0, ufds + 4 + 2,
1993 revents);
1994 break;
1995 }
1996
1997 case TARGET_SYS_gettimeofday:
1998 if (arg1 != 0)
1999 {
2000 USI ts = TARGET_TIME (current_cpu);
2001 USI tms = TARGET_TIME_MS (current_cpu);
2002
2003 /* First dword is seconds since TARGET_EPOCH. */
2004 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg1, ts);
2005
2006 /* Second dword is microseconds. */
2007 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg1 + 4,
2008 (tms % 1000) * 1000);
2009 }
2010 if (arg2 != 0)
2011 {
2012 /* Time-zone info is always cleared. */
2013 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg2, 0);
2014 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg2 + 4, 0);
2015 }
2016 retval = 0;
2017 break;
2018
2019 case TARGET_SYS_llseek:
2020 {
2021 /* If it fits, tweak parameters to fit the "generic" 32-bit
2022 lseek and use that. */
2023 SI fd = arg1;
2024 SI offs_hi = arg2;
2025 SI offs_lo = arg3;
2026 SI resultp = arg4;
2027 SI whence = arg5;
2028 retval = 0;
2029
2030 if (!((offs_hi == 0 && offs_lo >= 0)
2031 || (offs_hi == -1 && offs_lo < 0)))
2032 {
2033 sim_io_eprintf (sd,
2034 "Unimplemented llseek offset,"
2035 " fd %d: 0x%x:0x%x\n",
2036 fd, (unsigned) arg2, (unsigned) arg3);
2037 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
2038 SIM_SIGILL);
2039 }
2040
2041 s.func = TARGET_SYS_lseek;
2042 s.arg2 = offs_lo;
2043 s.arg3 = whence;
2044 if (cb_syscall (cb, &s) != CB_RC_OK)
2045 {
2046 sim_io_eprintf (sd, "Break 13: invalid %d? Returned %ld\n", callnum,
2047 s.result);
2048 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped, SIM_SIGILL);
2049 }
2050 if (s.result < 0)
2051 retval = -s.errcode;
2052 else
2053 {
2054 sim_core_write_unaligned_4 (current_cpu, pc, 0, resultp,
2055 s.result);
2056 sim_core_write_unaligned_4 (current_cpu, pc, 0, resultp + 4,
2057 s.result < 0 ? -1 : 0);
2058 }
2059 break;
2060 }
2061
2062 /* This one does have a generic callback function, but at the time
2063 of this writing, cb_syscall does not have code for it, and we
2064 need target-specific code for the threads implementation
2065 anyway. */
2066 case TARGET_SYS_kill:
2067 {
2068 USI pid = arg1;
2069 USI sig = arg2;
2070
2071 retval = 0;
2072
2073 /* At kill(2), glibc sets signal masks such that the thread
2074 machinery is initialized. Still, there is and was only
2075 one thread. */
2076 if (current_cpu->max_threadid == 0)
2077 {
2078 if (pid != TARGET_PID)
2079 {
2080 retval = -cb_host_to_target_errno (cb, EPERM);
2081 break;
2082 }
2083
2084 /* FIXME: Signal infrastructure (target-to-sim mapping). */
2085 if (sig == TARGET_SIGABRT)
2086 /* A call "abort ()", i.e. "kill (getpid(), SIGABRT)" is
2087 the end-point for failing GCC test-cases. */
2088 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
2089 SIM_SIGABRT);
2090 else
2091 {
2092 sim_io_eprintf (sd, "Unimplemented signal: %d\n", sig);
2093 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
2094 SIM_SIGILL);
2095 }
2096
2097 /* This will not be reached. */
2098 abort ();
2099 }
2100 else
2101 retval = deliver_signal (current_cpu, sig, pid);
2102 break;
2103 }
2104
2105 case TARGET_SYS_rt_sigprocmask:
2106 {
2107 int i;
2108 USI how = arg1;
2109 USI newsetp = arg2;
2110 USI oldsetp = arg3;
2111
2112 if (how != TARGET_SIG_BLOCK
2113 && how != TARGET_SIG_SETMASK
2114 && how != TARGET_SIG_UNBLOCK)
2115 {
2116 sim_io_eprintf (sd, "Unimplemented rt_sigprocmask syscall "
2117 "(0x%x, 0x%x, 0x%x)\n", arg1, arg2, arg3);
2118 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
2119 SIM_SIGILL);
2120 retval = 0;
2121 break;
2122 }
2123
2124 if (newsetp)
2125 {
2126 USI set_low
2127 = sim_core_read_unaligned_4 (current_cpu, pc, 0,
2128 newsetp);
2129 USI set_high
2130 = sim_core_read_unaligned_4 (current_cpu, pc, 0,
2131 newsetp + 4);
2132
2133 /* The sigmask is kept in the per-thread data, so we may
2134 need to create the first one. */
2135 if (current_cpu->thread_data == NULL)
2136 make_first_thread (current_cpu);
2137
2138 if (how == TARGET_SIG_SETMASK)
2139 for (i = 0; i < 64; i++)
2140 current_cpu->thread_data[threadno].sigdata[i].blocked = 0;
2141
2142 for (i = 0; i < 32; i++)
2143 if ((set_low & (1 << i)))
2144 current_cpu->thread_data[threadno].sigdata[i + 1].blocked
2145 = (how != TARGET_SIG_UNBLOCK);
2146
2147 for (i = 0; i < 31; i++)
2148 if ((set_high & (1 << i)))
2149 current_cpu->thread_data[threadno].sigdata[i + 33].blocked
2150 = (how != TARGET_SIG_UNBLOCK);
2151
2152 /* The mask changed, so a signal may be unblocked for
2153 execution. */
2154 current_cpu->thread_data[threadno].sigpending = 1;
2155 }
2156
2157 if (oldsetp != 0)
2158 {
2159 USI set_low = 0;
2160 USI set_high = 0;
2161
2162 for (i = 0; i < 32; i++)
2163 if (current_cpu->thread_data[threadno]
2164 .sigdata[i + 1].blocked)
2165 set_low |= 1 << i;
2166 for (i = 0; i < 31; i++)
2167 if (current_cpu->thread_data[threadno]
2168 .sigdata[i + 33].blocked)
2169 set_high |= 1 << i;
2170
2171 sim_core_write_unaligned_4 (current_cpu, pc, 0, oldsetp + 0, set_low);
2172 sim_core_write_unaligned_4 (current_cpu, pc, 0, oldsetp + 4, set_high);
2173 }
2174
2175 retval = 0;
2176 break;
2177 }
2178
2179 case TARGET_SYS_sigreturn:
2180 {
2181 int i;
2182 bfd_byte regbuf[4];
2183 int was_sigsuspended;
2184
2185 if (current_cpu->thread_data == NULL
2186 /* The CPU context is saved with the simulator data, not
2187 on the stack as in the real world. */
2188 || (current_cpu->thread_data[threadno].cpu_context_atsignal
2189 == NULL))
2190 {
2191 sim_io_eprintf (sd, "Invalid sigreturn syscall: no signal"
2192 " handler active "
2193 "(0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%lx)\n",
2194 (unsigned long) arg1,
2195 (unsigned long) arg2,
2196 (unsigned long) arg3,
2197 (unsigned long) arg4,
2198 (unsigned long) arg5,
2199 (unsigned long) arg6);
2200 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
2201 SIM_SIGILL);
2202 }
2203
2204 was_sigsuspended
2205 = current_cpu->thread_data[threadno].sigsuspended;
2206
2207 /* Restore the sigmask, either from the stack copy made when
2208 the sighandler was called, or from the saved state
2209 specifically for sigsuspend(2). */
2210 if (was_sigsuspended)
2211 {
2212 current_cpu->thread_data[threadno].sigsuspended = 0;
2213 for (i = 0; i < 64; i++)
2214 current_cpu->thread_data[threadno].sigdata[i].blocked
2215 = current_cpu->thread_data[threadno]
2216 .sigdata[i].blocked_suspendsave;
2217 }
2218 else
2219 {
2220 USI sp;
2221 USI set_low;
2222 USI set_high;
2223
2224 (*CPU_REG_FETCH (current_cpu)) (current_cpu,
2225 H_GR_SP, regbuf, 4);
2226 sp = bfd_getl32 (regbuf);
2227 set_low
2228 = sim_core_read_unaligned_4 (current_cpu, pc, 0, sp);
2229 set_high
2230 = sim_core_read_unaligned_4 (current_cpu, pc, 0, sp + 4);
2231
2232 for (i = 0; i < 32; i++)
2233 current_cpu->thread_data[threadno].sigdata[i + 1].blocked
2234 = (set_low & (1 << i)) != 0;
2235 for (i = 0; i < 31; i++)
2236 current_cpu->thread_data[threadno].sigdata[i + 33].blocked
2237 = (set_high & (1 << i)) != 0;
2238 }
2239
2240 /* The mask changed, so a signal may be unblocked for
2241 execution. */
2242 current_cpu->thread_data[threadno].sigpending = 1;
2243
2244 memcpy (&current_cpu->cpu_data_placeholder,
2245 current_cpu->thread_data[threadno].cpu_context_atsignal,
2246 current_cpu->thread_cpu_data_size);
2247 free (current_cpu->thread_data[threadno].cpu_context_atsignal);
2248 current_cpu->thread_data[threadno].cpu_context_atsignal = NULL;
2249
2250 /* The return value must come from the saved R10. */
2251 (*CPU_REG_FETCH (current_cpu)) (current_cpu, H_GR_R10, regbuf, 4);
2252 retval = bfd_getl32 (regbuf);
2253
2254 /* We must also break the "sigsuspension loop". */
2255 if (was_sigsuspended)
2256 sim_pc_set (current_cpu, sim_pc_get (current_cpu) + 2);
2257 break;
2258 }
2259
2260 case TARGET_SYS_rt_sigsuspend:
2261 {
2262 USI newsetp = arg1;
2263 USI setsize = arg2;
2264
2265 if (setsize != 8)
2266 {
2267 sim_io_eprintf (sd, "Unimplemented rt_sigsuspend syscall"
2268 " arguments (0x%lx, 0x%lx)\n",
2269 (unsigned long) arg1, (unsigned long) arg2);
2270 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
2271 SIM_SIGILL);
2272 }
2273
2274 /* Don't change the signal mask if we're already in
2275 sigsuspend state (i.e. this syscall is a rerun). */
2276 else if (!current_cpu->thread_data[threadno].sigsuspended)
2277 {
2278 USI set_low
2279 = sim_core_read_unaligned_4 (current_cpu, pc, 0,
2280 newsetp);
2281 USI set_high
2282 = sim_core_read_unaligned_4 (current_cpu, pc, 0,
2283 newsetp + 4);
2284 int i;
2285
2286 /* Save the current sigmask and insert the user-supplied
2287 one. */
2288 for (i = 0; i < 32; i++)
2289 {
2290 current_cpu->thread_data[threadno]
2291 .sigdata[i + 1].blocked_suspendsave
2292 = current_cpu->thread_data[threadno]
2293 .sigdata[i + 1].blocked;
2294
2295 current_cpu->thread_data[threadno]
2296 .sigdata[i + 1].blocked = (set_low & (1 << i)) != 0;
2297 }
2298 for (i = 0; i < 31; i++)
2299 {
2300 current_cpu->thread_data[threadno]
2301 .sigdata[i + 33].blocked_suspendsave
2302 = current_cpu->thread_data[threadno]
2303 .sigdata[i + 33].blocked;
2304 current_cpu->thread_data[threadno]
2305 .sigdata[i + 33].blocked = (set_high & (1 << i)) != 0;
2306 }
2307
2308 current_cpu->thread_data[threadno].sigsuspended = 1;
2309
2310 /* The mask changed, so a signal may be unblocked for
2311 execution. */
2312 current_cpu->thread_data[threadno].sigpending = 1;
2313 }
2314
2315 /* Because we don't use arg1 (newsetp) when this syscall is
2316 rerun, it doesn't matter that we overwrite it with the
2317 (constant) return value. */
2318 retval = -cb_host_to_target_errno (cb, EINTR);
2319 sim_pc_set (current_cpu, pc);
2320 break;
2321 }
2322
2323 /* Add case labels here for other syscalls using the 32-bit
2324 "struct stat", provided they have a corresponding simulator
2325 function of course. */
2326 case TARGET_SYS_fstat:
2327 {
2328 /* As long as the infrastructure doesn't cache anything
2329 related to the stat mapping, this trick gets us a dual
2330 "struct stat"-type mapping in the least error-prone way. */
2331 const char *saved_map = cb->stat_map;
2332 CB_TARGET_DEFS_MAP *saved_syscall_map = cb->syscall_map;
2333
2334 cb->syscall_map = (CB_TARGET_DEFS_MAP *) syscall_stat32_map;
2335 cb->stat_map = stat32_map;
2336
2337 if (cb_syscall (cb, &s) != CB_RC_OK)
2338 {
2339 abort ();
2340 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
2341 SIM_SIGILL);
2342 }
2343 retval = s.result == -1 ? -s.errcode : s.result;
2344
2345 cb->stat_map = saved_map;
2346 cb->syscall_map = saved_syscall_map;
2347 break;
2348 }
2349
2350 case TARGET_SYS_getcwd:
2351 {
2352 USI buf = arg1;
2353 USI size = arg2;
2354
2355 char *cwd = xmalloc (MAXPATHLEN);
2356 if (cwd != getcwd (cwd, MAXPATHLEN))
2357 abort ();
2358
2359 /* FIXME: When and if we support chdir, we need something
2360 a bit more elaborate. */
2361 if (simulator_sysroot[0] != '\0')
2362 strcpy (cwd, "/");
2363
2364 retval = -cb_host_to_target_errno (cb, ERANGE);
2365 if (strlen (cwd) + 1 <= size)
2366 {
2367 retval = strlen (cwd) + 1;
2368 if (sim_core_write_buffer (sd, current_cpu, 0, cwd,
2369 buf, retval)
2370 != (unsigned int) retval)
2371 retval = -cb_host_to_target_errno (cb, EFAULT);
2372 }
2373 free (cwd);
2374 break;
2375 }
2376
2377 case TARGET_SYS_readlink:
2378 {
2379 SI path = arg1;
2380 SI buf = arg2;
2381 SI bufsiz = arg3;
2382 char *pbuf = xmalloc (MAXPATHLEN);
2383 char *lbuf = xmalloc (MAXPATHLEN);
2384 char *lbuf_alloc = lbuf;
2385 int nchars = -1;
2386 int i;
2387 int o = 0;
2388
2389 if (sim_core_read_unaligned_1 (current_cpu, pc, 0, path) == '/')
2390 {
2391 strcpy (pbuf, simulator_sysroot);
2392 o += strlen (simulator_sysroot);
2393 }
2394
2395 for (i = 0; i + o < MAXPATHLEN; i++)
2396 {
2397 pbuf[i + o]
2398 = sim_core_read_unaligned_1 (current_cpu, pc, 0, path + i);
2399 if (pbuf[i + o] == 0)
2400 break;
2401 }
2402
2403 if (i + o == MAXPATHLEN)
2404 {
2405 retval = -cb_host_to_target_errno (cb, ENAMETOOLONG);
2406 break;
2407 }
2408
2409 /* Intervene calls for certain files expected in the target
2410 proc file system. */
2411 if (strcmp (pbuf + strlen (simulator_sysroot),
2412 "/proc/" XSTRING (TARGET_PID) "/exe") == 0)
2413 {
2414 char *argv0
2415 = (STATE_PROG_ARGV (sd) != NULL
2416 ? *STATE_PROG_ARGV (sd) : NULL);
2417
2418 if (argv0 == NULL || *argv0 == '.')
2419 {
2420 sim_io_eprintf (sd, "Unimplemented readlink syscall "
2421 "(0x%lx: [\"%s\"], 0x%lx)\n",
2422 (unsigned long) arg1, pbuf,
2423 (unsigned long) arg2);
2424 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
2425 SIM_SIGILL);
2426 break;
2427 }
2428 else if (*argv0 == '/')
2429 {
2430 if (strncmp (simulator_sysroot, argv0,
2431 strlen (simulator_sysroot)) == 0)
2432 argv0 += strlen (simulator_sysroot);
2433
2434 strcpy (lbuf, argv0);
2435 nchars = strlen (argv0) + 1;
2436 }
2437 else
2438 {
2439 if (getcwd (lbuf, MAXPATHLEN) != NULL
2440 && strlen (lbuf) + 2 + strlen (argv0) < MAXPATHLEN)
2441 {
2442 if (strncmp (simulator_sysroot, lbuf,
2443 strlen (simulator_sysroot)) == 0)
2444 lbuf += strlen (simulator_sysroot);
2445
2446 strcat (lbuf, "/");
2447 strcat (lbuf, argv0);
2448 nchars = strlen (lbuf) + 1;
2449 }
2450 else
2451 abort ();
2452 }
2453 }
2454 else
2455 nchars = readlink (pbuf, lbuf, MAXPATHLEN);
2456
2457 /* We trust that the readlink result returns a *relative*
2458 link, or one already adjusted for the file-path-prefix.
2459 (We can't generally tell the difference, so we go with
2460 the easiest decision; no adjustment.) */
2461
2462 if (nchars == -1)
2463 {
2464 retval = -cb_host_to_target_errno (cb, errno);
2465 break;
2466 }
2467
2468 if (bufsiz < nchars)
2469 nchars = bufsiz;
2470
2471 if (sim_core_write_buffer (sd, current_cpu, write_map, lbuf,
2472 buf, nchars) != (unsigned int) nchars)
2473 retval = -cb_host_to_target_errno (cb, EFAULT);
2474 else
2475 retval = nchars;
2476
2477 free (pbuf);
2478 free (lbuf_alloc);
2479 break;
2480 }
2481
2482 case TARGET_SYS_sched_getscheduler:
2483 {
2484 USI pid = arg1;
2485
2486 /* FIXME: Search (other) existing threads. */
2487 if (pid != 0 && pid != TARGET_PID)
2488 retval = -cb_host_to_target_errno (cb, ESRCH);
2489 else
2490 retval = TARGET_SCHED_OTHER;
2491 break;
2492 }
2493
2494 case TARGET_SYS_sched_getparam:
2495 {
2496 USI pid = arg1;
2497 USI paramp = arg2;
2498
2499 /* The kernel says:
2500 struct sched_param {
2501 int sched_priority;
2502 }; */
2503
2504 if (pid != 0 && pid != TARGET_PID)
2505 retval = -cb_host_to_target_errno (cb, ESRCH);
2506 else
2507 {
2508 /* FIXME: Save scheduler setting before threads are
2509 created too. */
2510 sim_core_write_unaligned_4 (current_cpu, pc, 0, paramp,
2511 current_cpu->thread_data != NULL
2512 ? (current_cpu
2513 ->thread_data[threadno]
2514 .priority)
2515 : 0);
2516 retval = 0;
2517 }
2518 break;
2519 }
2520
2521 case TARGET_SYS_sched_setparam:
2522 {
2523 USI pid = arg1;
2524 USI paramp = arg2;
2525
2526 if ((pid != 0 && pid != TARGET_PID)
2527 || sim_core_read_unaligned_4 (current_cpu, pc, 0,
2528 paramp) != 0)
2529 retval = -cb_host_to_target_errno (cb, EINVAL);
2530 else
2531 retval = 0;
2532 break;
2533 }
2534
2535 case TARGET_SYS_sched_setscheduler:
2536 {
2537 USI pid = arg1;
2538 USI policy = arg2;
2539 USI paramp = arg3;
2540
2541 if ((pid != 0 && pid != TARGET_PID)
2542 || policy != TARGET_SCHED_OTHER
2543 || sim_core_read_unaligned_4 (current_cpu, pc, 0,
2544 paramp) != 0)
2545 retval = -cb_host_to_target_errno (cb, EINVAL);
2546 else
2547 /* FIXME: Save scheduler setting to be read in later
2548 sched_getparam calls. */
2549 retval = 0;
2550 break;
2551 }
2552
2553 case TARGET_SYS_sched_yield:
2554 /* We reschedule to the next thread after a syscall anyway, so
2555 we don't have to do anything here than to set the return
2556 value. */
2557 retval = 0;
2558 break;
2559
2560 case TARGET_SYS_sched_get_priority_min:
2561 case TARGET_SYS_sched_get_priority_max:
2562 if (arg1 != 0)
2563 retval = -cb_host_to_target_errno (cb, EINVAL);
2564 else
2565 retval = 0;
2566 break;
2567
2568 case TARGET_SYS_ugetrlimit:
2569 {
2570 unsigned int curlim, maxlim;
2571 if (arg1 != TARGET_RLIMIT_STACK && arg1 != TARGET_RLIMIT_NOFILE)
2572 {
2573 retval = -cb_host_to_target_errno (cb, EINVAL);
2574 break;
2575 }
2576
2577 /* The kernel says:
2578 struct rlimit {
2579 unsigned long rlim_cur;
2580 unsigned long rlim_max;
2581 }; */
2582 if (arg1 == TARGET_RLIMIT_NOFILE)
2583 {
2584 /* Sadly a very low limit. Better not lie, though. */
2585 maxlim = curlim = MAX_CALLBACK_FDS;
2586 }
2587 else /* arg1 == TARGET_RLIMIT_STACK */
2588 {
2589 maxlim = 0xffffffff;
2590 curlim = 0x800000;
2591 }
2592 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg2, curlim);
2593 sim_core_write_unaligned_4 (current_cpu, pc, 0, arg2 + 4, maxlim);
2594 retval = 0;
2595 break;
2596 }
2597
2598 case TARGET_SYS_setrlimit:
2599 if (arg1 != TARGET_RLIMIT_STACK)
2600 {
2601 retval = -cb_host_to_target_errno (cb, EINVAL);
2602 break;
2603 }
2604 /* FIXME: Save values for future ugetrlimit calls. */
2605 retval = 0;
2606 break;
2607
2608 /* Provide a very limited subset of the sysctl functions, and
2609 abort for the rest. */
2610 case TARGET_SYS__sysctl:
2611 {
2612 /* The kernel says:
2613 struct __sysctl_args {
2614 int *name;
2615 int nlen;
2616 void *oldval;
2617 size_t *oldlenp;
2618 void *newval;
2619 size_t newlen;
2620 unsigned long __unused[4];
2621 }; */
2622 SI name = sim_core_read_unaligned_4 (current_cpu, pc, 0, arg1);
2623 SI name0 = name == 0
2624 ? 0 : sim_core_read_unaligned_4 (current_cpu, pc, 0, name);
2625 SI name1 = name == 0
2626 ? 0 : sim_core_read_unaligned_4 (current_cpu, pc, 0, name + 4);
2627 SI nlen
2628 = sim_core_read_unaligned_4 (current_cpu, pc, 0, arg1 + 4);
2629 SI oldval
2630 = sim_core_read_unaligned_4 (current_cpu, pc, 0, arg1 + 8);
2631 SI oldlenp
2632 = sim_core_read_unaligned_4 (current_cpu, pc, 0, arg1 + 12);
2633 SI oldlen = oldlenp == 0
2634 ? 0 : sim_core_read_unaligned_4 (current_cpu, pc, 0, oldlenp);
2635 SI newval
2636 = sim_core_read_unaligned_4 (current_cpu, pc, 0, arg1 + 16);
2637 SI newlen
2638 = sim_core_read_unaligned_4 (current_cpu, pc, 0, arg1 + 20);
2639
2640 if (name0 == TARGET_CTL_KERN && name1 == TARGET_CTL_KERN_VERSION)
2641 {
2642 SI to_write = oldlen < (SI) sizeof (TARGET_UTSNAME)
2643 ? oldlen : (SI) sizeof (TARGET_UTSNAME);
2644
2645 sim_core_write_unaligned_4 (current_cpu, pc, 0, oldlenp,
2646 sizeof (TARGET_UTSNAME));
2647
2648 if (sim_core_write_buffer (sd, current_cpu, write_map,
2649 TARGET_UTSNAME, oldval,
2650 to_write)
2651 != (unsigned int) to_write)
2652 retval = -cb_host_to_target_errno (cb, EFAULT);
2653 else
2654 retval = 0;
2655 break;
2656 }
2657
2658 sim_io_eprintf (sd, "Unimplemented _sysctl syscall "
2659 "(0x%lx: [0x%lx, 0x%lx],"
2660 " 0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%lx)\n",
2661 (unsigned long) name,
2662 (unsigned long) name0,
2663 (unsigned long) name1,
2664 (unsigned long) nlen,
2665 (unsigned long) oldval,
2666 (unsigned long) oldlenp,
2667 (unsigned long) newval,
2668 (unsigned long) newlen);
2669 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
2670 SIM_SIGILL);
2671 break;
2672 }
2673
2674 case TARGET_SYS_exit:
2675 {
2676 /* Here for all but the last thread. */
2677 int i;
2678 int pid
2679 = current_cpu->thread_data[threadno].threadid + TARGET_PID;
2680 int ppid
2681 = (current_cpu->thread_data[threadno].parent_threadid
2682 + TARGET_PID);
2683 int exitsig = current_cpu->thread_data[threadno].exitsig;
2684
2685 /* Any children are now all orphans. */
2686 for (i = 0; i < SIM_TARGET_MAX_THREADS; i++)
2687 if (current_cpu->thread_data[i].parent_threadid
2688 == current_cpu->thread_data[threadno].threadid)
2689 /* Make getppid(2) return 1 for them, poor little ones. */
2690 current_cpu->thread_data[i].parent_threadid = -TARGET_PID + 1;
2691
2692 /* Free the cpu context data. When the parent has received
2693 the exit status, we'll clear the entry too. */
2694 free (current_cpu->thread_data[threadno].cpu_context);
2695 current_cpu->thread_data[threadno].cpu_context = NULL;
2696 current_cpu->m1threads--;
2697 if (arg1 != 0)
2698 {
2699 sim_io_eprintf (sd, "Thread %d exited with status %d\n",
2700 pid, arg1);
2701 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
2702 SIM_SIGILL);
2703 }
2704
2705 /* Still, we may want to support non-zero exit values. */
2706 current_cpu->thread_data[threadno].exitval = arg1 << 8;
2707
2708 if (exitsig)
2709 deliver_signal (current_cpu, exitsig, ppid);
2710 break;
2711 }
2712
2713 case TARGET_SYS_clone:
2714 {
2715 int nthreads = current_cpu->m1threads + 1;
2716 void *thread_cpu_data;
2717 bfd_byte old_sp_buf[4];
2718 bfd_byte sp_buf[4];
2719 const bfd_byte zeros[4] = { 0, 0, 0, 0 };
2720 int i;
2721
2722 /* That's right, the syscall clone arguments are reversed
2723 compared to sys_clone notes in clone(2) and compared to
2724 other Linux ports (i.e. it's the same order as in the
2725 clone(2) libcall). */
2726 USI flags = arg2;
2727 USI newsp = arg1;
2728
2729 if (nthreads == SIM_TARGET_MAX_THREADS)
2730 {
2731 retval = -cb_host_to_target_errno (cb, EAGAIN);
2732 break;
2733 }
2734
2735 /* FIXME: Implement the low byte. */
2736 if ((flags & ~TARGET_CSIGNAL) !=
2737 (TARGET_CLONE_VM
2738 | TARGET_CLONE_FS
2739 | TARGET_CLONE_FILES
2740 | TARGET_CLONE_SIGHAND)
2741 || newsp == 0)
2742 {
2743 sim_io_eprintf (sd,
2744 "Unimplemented clone syscall (0x%lx, 0x%lx)\n",
2745 (unsigned long) arg1, (unsigned long) arg2);
2746 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
2747 SIM_SIGILL);
2748 }
2749
2750 if (current_cpu->thread_data == NULL)
2751 make_first_thread (current_cpu);
2752
2753 /* The created thread will get the new SP and a cleared R10.
2754 Since it's created out of a copy of the old thread and we
2755 don't have a set-register-function that just take the
2756 cpu_data as a parameter, we set the childs values first,
2757 and write back or overwrite them in the parent after the
2758 copy. */
2759 (*CPU_REG_FETCH (current_cpu)) (current_cpu,
2760 H_GR_SP, old_sp_buf, 4);
2761 bfd_putl32 (newsp, sp_buf);
2762 (*CPU_REG_STORE (current_cpu)) (current_cpu,
2763 H_GR_SP, sp_buf, 4);
2764 (*CPU_REG_STORE (current_cpu)) (current_cpu,
2765 H_GR_R10, (bfd_byte *) zeros, 4);
2766 thread_cpu_data
2767 = (*current_cpu
2768 ->make_thread_cpu_data) (current_cpu,
2769 &current_cpu->cpu_data_placeholder);
2770 (*CPU_REG_STORE (current_cpu)) (current_cpu,
2771 H_GR_SP, old_sp_buf, 4);
2772
2773 retval = ++current_cpu->max_threadid + TARGET_PID;
2774
2775 /* Find an unused slot. After a few threads have been created
2776 and exited, the array is expected to be a bit fragmented.
2777 We don't reuse the first entry, though, that of the
2778 original thread. */
2779 for (i = 1; i < SIM_TARGET_MAX_THREADS; i++)
2780 if (current_cpu->thread_data[i].cpu_context == NULL
2781 /* Don't reuse a zombied entry. */
2782 && current_cpu->thread_data[i].threadid == 0)
2783 break;
2784
2785 memcpy (&current_cpu->thread_data[i],
2786 &current_cpu->thread_data[threadno],
2787 sizeof (current_cpu->thread_data[i]));
2788 current_cpu->thread_data[i].cpu_context = thread_cpu_data;
2789 current_cpu->thread_data[i].cpu_context_atsignal = NULL;
2790 current_cpu->thread_data[i].threadid = current_cpu->max_threadid;
2791 current_cpu->thread_data[i].parent_threadid
2792 = current_cpu->thread_data[threadno].threadid;
2793 current_cpu->thread_data[i].pipe_read_fd = 0;
2794 current_cpu->thread_data[i].pipe_write_fd = 0;
2795 current_cpu->thread_data[i].at_syscall = 0;
2796 current_cpu->thread_data[i].sigpending = 0;
2797 current_cpu->thread_data[i].sigsuspended = 0;
2798 current_cpu->thread_data[i].exitsig = flags & TARGET_CSIGNAL;
2799 current_cpu->m1threads = nthreads;
2800 break;
2801 }
2802
2803 /* Better watch these in case they do something necessary. */
2804 case TARGET_SYS_socketcall:
2805 retval = -cb_host_to_target_errno (cb, ENOSYS);
2806 break;
2807
2808 unimplemented_syscall:
2809 default:
2810 sim_io_eprintf (sd, "Unimplemented syscall: %d "
2811 "(0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x)\n", callnum,
2812 arg1, arg2, arg3, arg4, arg5, arg6);
2813 sim_engine_halt (sd, current_cpu, NULL, pc, sim_stopped,
2814 SIM_SIGILL);
2815 }
2816 }
2817
2818 /* A system call is a rescheduling point. For the time being, we don't
2819 reschedule anywhere else. */
2820 if (current_cpu->m1threads != 0
2821 /* We need to schedule off from an exiting thread that is the
2822 second-last one. */
2823 || (current_cpu->thread_data != NULL
2824 && current_cpu->thread_data[threadno].cpu_context == NULL))
2825 {
2826 bfd_byte retval_buf[4];
2827
2828 current_cpu->thread_data[threadno].last_execution
2829 = TARGET_TIME_MS (current_cpu);
2830 bfd_putl32 (retval, retval_buf);
2831 (*CPU_REG_STORE (current_cpu)) (current_cpu, H_GR_R10, retval_buf, 4);
2832
2833 current_cpu->thread_data[threadno].at_syscall = 1;
2834 reschedule (current_cpu);
2835
2836 (*CPU_REG_FETCH (current_cpu)) (current_cpu, H_GR_R10, retval_buf, 4);
2837 retval = bfd_getl32 (retval_buf);
2838 }
2839
2840 return retval;
2841 }
2842
2843 /* Callback from simulator write saying that the pipe at (reader, writer)
2844 is now non-empty (so the writer should wait until the pipe is empty, at
2845 least not write to this or any other pipe). Simplest is to just wait
2846 until the pipe is empty. */
2847
2848 static void
2849 cris_pipe_nonempty (host_callback *cb ATTRIBUTE_UNUSED,
2850 int reader, int writer)
2851 {
2852 SIM_CPU *cpu = current_cpu_for_cb_callback;
2853 const bfd_byte zeros[4] = { 0, 0, 0, 0 };
2854
2855 /* It's the current thread: we just have to re-run the current
2856 syscall instruction (presumably "break 13") and change the syscall
2857 to the special simulator-wait code. Oh, and set a marker that
2858 we're waiting, so we can disambiguate the special call from a
2859 program error.
2860
2861 This function may be called multiple times between cris_pipe_empty,
2862 but we must avoid e.g. decreasing PC every time. Check fd markers
2863 to tell. */
2864 if (cpu->thread_data == NULL)
2865 {
2866 sim_io_eprintf (CPU_STATE (cpu),
2867 "Terminating simulation due to writing pipe rd:wr %d:%d"
2868 " from one single thread\n", reader, writer);
2869 sim_engine_halt (CPU_STATE (cpu), cpu,
2870 NULL, sim_pc_get (cpu), sim_stopped, SIM_SIGILL);
2871 }
2872 else if (cpu->thread_data[cpu->threadno].pipe_write_fd == 0)
2873 {
2874 cpu->thread_data[cpu->threadno].pipe_write_fd = writer;
2875 cpu->thread_data[cpu->threadno].pipe_read_fd = reader;
2876 /* FIXME: We really shouldn't change registers other than R10 in
2877 syscalls (like R9), here or elsewhere. */
2878 (*CPU_REG_STORE (cpu)) (cpu, H_GR_R9, (bfd_byte *) zeros, 4);
2879 sim_pc_set (cpu, sim_pc_get (cpu) - 2);
2880 }
2881 }
2882
2883 /* Callback from simulator close or read call saying that the pipe at
2884 (reader, writer) is now empty (so the writer can write again, perhaps
2885 leave a waiting state). If there are bytes remaining, they couldn't be
2886 consumed (perhaps due to the pipe closing). */
2887
2888 static void
2889 cris_pipe_empty (host_callback *cb,
2890 int reader ATTRIBUTE_UNUSED,
2891 int writer)
2892 {
2893 int i;
2894 SIM_CPU *cpu = current_cpu_for_cb_callback;
2895 bfd_byte r10_buf[4];
2896 int remaining = cb->pipe_buffer[writer].size;
2897
2898 /* We need to find the thread that waits for this pipe. */
2899 for (i = 0; i < SIM_TARGET_MAX_THREADS; i++)
2900 if (cpu->thread_data[i].cpu_context
2901 && cpu->thread_data[i].pipe_write_fd == writer)
2902 {
2903 int retval;
2904 /* Temporarily switch to this cpu context, so we can change the
2905 PC by ordinary calls. */
2906
2907 memcpy (cpu->thread_data[cpu->threadno].cpu_context,
2908 &cpu->cpu_data_placeholder,
2909 cpu->thread_cpu_data_size);
2910 memcpy (&cpu->cpu_data_placeholder,
2911 cpu->thread_data[i].cpu_context,
2912 cpu->thread_cpu_data_size);
2913
2914 /* The return value is supposed to contain the number of written
2915 bytes, which is the number of bytes requested and returned at
2916 the write call. We subtract the remaining bytes from that,
2917 but making sure we still get a positive number.
2918 The return value may also be a negative number; an error
2919 value. We cover this case by comparing against remaining,
2920 which is always >= 0. */
2921 (*CPU_REG_FETCH (cpu)) (cpu, H_GR_R10, r10_buf, 4);
2922 retval = (int) bfd_getl_signed_32 (r10_buf);
2923 if (retval >= remaining)
2924 bfd_putl32 (retval - remaining, r10_buf);
2925 (*CPU_REG_STORE (cpu)) (cpu, H_GR_R10, r10_buf, 4);
2926
2927 sim_pc_set (cpu, sim_pc_get (cpu) + 2);
2928 memcpy (cpu->thread_data[i].cpu_context,
2929 &cpu->cpu_data_placeholder,
2930 cpu->thread_cpu_data_size);
2931 memcpy (&cpu->cpu_data_placeholder,
2932 cpu->thread_data[cpu->threadno].cpu_context,
2933 cpu->thread_cpu_data_size);
2934 cpu->thread_data[i].pipe_read_fd = 0;
2935 cpu->thread_data[i].pipe_write_fd = 0;
2936 return;
2937 }
2938
2939 abort ();
2940 }
2941
2942 /* We have a simulator-specific notion of time. See TARGET_TIME. */
2943
2944 static long
2945 cris_time (host_callback *cb ATTRIBUTE_UNUSED, long *t)
2946 {
2947 long retval = TARGET_TIME (current_cpu_for_cb_callback);
2948 if (t)
2949 *t = retval;
2950 return retval;
2951 }
2952
2953 /* Set target-specific callback data. */
2954
2955 void
2956 cris_set_callbacks (host_callback *cb)
2957 {
2958 /* Yeargh, have to cast away constness to avoid warnings. */
2959 cb->syscall_map = (CB_TARGET_DEFS_MAP *) syscall_map;
2960 cb->errno_map = (CB_TARGET_DEFS_MAP *) errno_map;
2961
2962 /* The kernel stat64 layout. If we see a file > 2G, the "long"
2963 parameter to cb_store_target_endian will make st_size negative.
2964 Similarly for st_ino. FIXME: Find a 64-bit type, and use it
2965 *unsigned*, and/or add syntax for signed-ness. */
2966 cb->stat_map = stat_map;
2967 cb->open_map = (CB_TARGET_DEFS_MAP *) open_map;
2968 cb->pipe_nonempty = cris_pipe_nonempty;
2969 cb->pipe_empty = cris_pipe_empty;
2970 cb->time = cris_time;
2971 }
2972
2973 /* Process an address exception. */
2974
2975 void
2976 cris_core_signal (SIM_DESC sd, SIM_CPU *current_cpu, sim_cia cia,
2977 unsigned int map, int nr_bytes, address_word addr,
2978 transfer_type transfer, sim_core_signals sig)
2979 {
2980 sim_core_signal (sd, current_cpu, cia, map, nr_bytes, addr,
2981 transfer, sig);
2982 }
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