traps.c revision 1.1.1.5
1 /* CRIS exception, interrupt, and trap (EIT) support 2 Copyright (C) 2004-2017 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 ¤t_cpu->cpu_data_placeholder, 1115 current_cpu->thread_cpu_data_size); 1116 1117 /* Copy the new context from its slot. */ 1118 memcpy (¤t_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 ¤t_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, ¤t_cpu->highest_mmapped_page, 1744 addr, newlen); 1745 else if (is_mapped (sd, ¤t_cpu->highest_mmapped_page, 1746 addr, newlen)) 1747 addr = 0; 1748 1749 newaddr 1750 = create_map (sd, ¤t_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, ¤t_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, ¤t_cpu->highest_mmapped_page, 1829 addr, newlen); 1830 else if (is_mapped (sd, ¤t_cpu->highest_mmapped_page, 1831 addr, newlen)) 1832 addr = 0; 1833 1834 newaddr = create_map (sd, ¤t_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, ¤t_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, ¤t_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, ¤t_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 (¤t_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 (¤t_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, ¤t_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, ¤t_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, ¤t_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, ¤t_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, ¤t_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 (¤t_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 ¤t_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 (¤t_cpu->thread_data[i], 3143 ¤t_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 } 3370
Indexes created Sun Jun 28 00:24:58 UTC 2026