sim/m32r/traps-linux.c

   1 /* m32r exception, interrupt, and trap (EIT) support
   2    Copyright (C) 1998-2021 Free Software Foundation, Inc.
   3    Contributed by Renesas.
   4
   5    This file is part of GDB, the GNU debugger.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 /* This must come before any other includes.  */
  21 #include "defs.h"
  22
  23 #include "portability.h"
  24 #include "sim-main.h"
  25 #include "sim-syscall.h"
  26 #include "syscall.h"
  27 #include "targ-vals.h"
  28 #include <dirent.h>
  29 #include <errno.h>
  30 #include <fcntl.h>
  31 #include <time.h>
  32 #include <unistd.h>
  33 #include <utime.h>
  34 #include <sys/mman.h>
  35 #include <sys/poll.h>
  36 #include <sys/resource.h>
  37 #include <sys/sysinfo.h>
  38 #include <sys/stat.h>
  39 #include <sys/time.h>
  40 #include <sys/timeb.h>
  41 #include <sys/timex.h>
  42 #include <sys/types.h>
  43 #include <sys/uio.h>
  44 #include <sys/utsname.h>
  45 #include <sys/vfs.h>
  46 #include <linux/sysctl.h>
  47 #include <linux/types.h>
  48 #include <linux/unistd.h>
  49
  50 #define TRAP_ELF_SYSCALL 0
  51 #define TRAP_LINUX_SYSCALL 2
  52 #define TRAP_FLUSH_CACHE 12
  53
  54 /* The semantic code invokes this for invalid (unrecognized) instructions.  */
  55
  56 SEM_PC
  57 sim_engine_invalid_insn (SIM_CPU *current_cpu, IADDR cia, SEM_PC vpc)
  58 {
  59   SIM_DESC sd = CPU_STATE (current_cpu);
  60
  61 #if 0
  62   if (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT)
  63     {
  64       h_bsm_set (current_cpu, h_sm_get (current_cpu));
  65       h_bie_set (current_cpu, h_ie_get (current_cpu));
  66       h_bcond_set (current_cpu, h_cond_get (current_cpu));
  67       /* sm not changed */
  68       h_ie_set (current_cpu, 0);
  69       h_cond_set (current_cpu, 0);
  70
  71       h_bpc_set (current_cpu, cia);
  72
  73       sim_engine_restart (CPU_STATE (current_cpu), current_cpu, NULL,
  74                           EIT_RSVD_INSN_ADDR);
  75     }
  76   else
  77 #endif
  78     sim_engine_halt (sd, current_cpu, NULL, cia, sim_stopped, SIM_SIGILL);
  79   return vpc;
  80 }
  81
  82 /* Process an address exception.  */
  83
  84 void
  85 m32r_core_signal (SIM_DESC sd, SIM_CPU *current_cpu, sim_cia cia,
  86                   unsigned int map, int nr_bytes, address_word addr,
  87                   transfer_type transfer, sim_core_signals sig)
  88 {
  89   if (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT)
  90     {
  91       m32rbf_h_cr_set (current_cpu, H_CR_BBPC,
  92                        m32rbf_h_cr_get (current_cpu, H_CR_BPC));
  93       if (MACH_NUM (CPU_MACH (current_cpu)) == MACH_M32R)
  94         {
  95           m32rbf_h_bpsw_set (current_cpu, m32rbf_h_psw_get (current_cpu));
  96           /* sm not changed */
  97           m32rbf_h_psw_set (current_cpu, m32rbf_h_psw_get (current_cpu) & 0x80);
  98         }
  99       else if (MACH_NUM (CPU_MACH (current_cpu)) == MACH_M32RX)
 100         {
 101           m32rxf_h_bpsw_set (current_cpu, m32rxf_h_psw_get (current_cpu));
 102           /* sm not changed */
 103           m32rxf_h_psw_set (current_cpu, m32rxf_h_psw_get (current_cpu) & 0x80);
 104         }
 105       else
 106         {
 107           m32r2f_h_bpsw_set (current_cpu, m32r2f_h_psw_get (current_cpu));
 108           /* sm not changed */
 109           m32r2f_h_psw_set (current_cpu, m32r2f_h_psw_get (current_cpu) & 0x80);
 110         }
 111       m32rbf_h_cr_set (current_cpu, H_CR_BPC, cia);
 112
 113       sim_engine_restart (CPU_STATE (current_cpu), current_cpu, NULL,
 114                           EIT_ADDR_EXCP_ADDR);
 115     }
 116   else
 117     sim_core_signal (sd, current_cpu, cia, map, nr_bytes, addr,
 118                      transfer, sig);
 119 }
 120 \f
 121 /* Translate target's address to host's address.  */
 122
 123 static void *
 124 t2h_addr (host_callback *cb, struct cb_syscall *sc,
 125           unsigned long taddr)
 126 {
 127   void *addr;
 128   SIM_DESC sd = (SIM_DESC) sc->p1;
 129   SIM_CPU *cpu = (SIM_CPU *) sc->p2;
 130
 131   if (taddr == 0)
 132     return NULL;
 133
 134   return sim_core_trans_addr (sd, cpu, read_map, taddr);
 135 }
 136
 137 static unsigned int
 138 conv_endian (unsigned int tvalue)
 139 {
 140   unsigned int hvalue;
 141   unsigned int t1, t2, t3, t4;
 142
 143   if (HOST_BYTE_ORDER == BFD_ENDIAN_LITTLE)
 144     {
 145       t1 = tvalue & 0xff000000;
 146       t2 = tvalue & 0x00ff0000;
 147       t3 = tvalue & 0x0000ff00;
 148       t4 = tvalue & 0x000000ff;
 149
 150       hvalue =  t1 >> 24;
 151       hvalue += t2 >> 8;
 152       hvalue += t3 << 8;
 153       hvalue += t4 << 24;
 154     }
 155   else
 156     hvalue = tvalue;
 157
 158   return hvalue;
 159 }
 160
 161 static unsigned short
 162 conv_endian16 (unsigned short tvalue)
 163 {
 164   unsigned short hvalue;
 165   unsigned short t1, t2;
 166
 167   if (HOST_BYTE_ORDER == BFD_ENDIAN_LITTLE)
 168     {
 169       t1 = tvalue & 0xff00;
 170       t2 = tvalue & 0x00ff;
 171
 172       hvalue =  t1 >> 8;
 173       hvalue += t2 << 8;
 174     }
 175   else
 176     hvalue = tvalue;
 177
 178   return hvalue;
 179 }
 180
 181 static void
 182 translate_endian(void *addr, size_t size)
 183 {
 184   unsigned int *p = (unsigned int *) addr;
 185   int i;
 186
 187   for (i = 0; i <= size - 4; i += 4,p++)
 188     *p = conv_endian(*p);
 189
 190   if (i <= size - 2)
 191     *((unsigned short *) p) = conv_endian16(*((unsigned short *) p));
 192 }
 193
 194 /* Trap support.
 195    The result is the pc address to continue at.
 196    Preprocessing like saving the various registers has already been done.  */
 197
 198 USI
 199 m32r_trap (SIM_CPU *current_cpu, PCADDR pc, int num)
 200 {
 201   SIM_DESC sd = CPU_STATE (current_cpu);
 202   host_callback *cb = STATE_CALLBACK (sd);
 203
 204   switch (num)
 205     {
 206     case TRAP_ELF_SYSCALL :
 207       {
 208         long result, result2;
 209         int errcode;
 210
 211         sim_syscall_multi (current_cpu,
 212                            m32rbf_h_gr_get (current_cpu, 0),
 213                            m32rbf_h_gr_get (current_cpu, 1),
 214                            m32rbf_h_gr_get (current_cpu, 2),
 215                            m32rbf_h_gr_get (current_cpu, 3),
 216                            m32rbf_h_gr_get (current_cpu, 4),
 217                            &result, &result2, &errcode);
 218
 219         m32rbf_h_gr_set (current_cpu, 2, errcode);
 220         m32rbf_h_gr_set (current_cpu, 0, result);
 221         m32rbf_h_gr_set (current_cpu, 1, result2);
 222         break;
 223       }
 224
 225     case TRAP_LINUX_SYSCALL :
 226       {
 227         CB_SYSCALL s;
 228         unsigned int func, arg1, arg2, arg3, arg4, arg5, arg6, arg7;
 229         int result, result2, errcode;
 230
 231         if (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT)
 232           {
 233             /* The new pc is the trap vector entry.
 234                We assume there's a branch there to some handler.
 235                Use cr5 as EVB (EIT Vector Base) register.  */
 236             USI new_pc = m32rbf_h_cr_get (current_cpu, 5) + 0x40 + num * 4;
 237             return new_pc;
 238           }
 239
 240         func = m32rbf_h_gr_get (current_cpu, 7);
 241         arg1 = m32rbf_h_gr_get (current_cpu, 0);
 242         arg2 = m32rbf_h_gr_get (current_cpu, 1);
 243         arg3 = m32rbf_h_gr_get (current_cpu, 2);
 244         arg4 = m32rbf_h_gr_get (current_cpu, 3);
 245         arg5 = m32rbf_h_gr_get (current_cpu, 4);
 246         arg6 = m32rbf_h_gr_get (current_cpu, 5);
 247         arg7 = m32rbf_h_gr_get (current_cpu, 6);
 248
 249         CB_SYSCALL_INIT (&s);
 250         s.func = func;
 251         s.arg1 = arg1;
 252         s.arg2 = arg2;
 253         s.arg3 = arg3;
 254
 255         s.p1 = (PTR) sd;
 256         s.p2 = (PTR) current_cpu;
 257         s.read_mem = sim_syscall_read_mem;
 258         s.write_mem = sim_syscall_write_mem;
 259
 260         result = 0;
 261         result2 = 0;
 262         errcode = 0;
 263
 264         switch (func)
 265           {
 266           case __NR_exit:
 267             sim_engine_halt (sd, current_cpu, NULL, pc, sim_exited, arg1);
 268             break;
 269
 270           case __NR_read:
 271             result = read(arg1, t2h_addr(cb, &s, arg2), arg3);
 272             errcode = errno;
 273             break;
 274
 275           case __NR_write:
 276             result = write(arg1, t2h_addr(cb, &s, arg2), arg3);
 277             errcode = errno;
 278             break;
 279
 280           case __NR_open:
 281             result = open((char *) t2h_addr(cb, &s, arg1), arg2, arg3);
 282             errcode = errno;
 283             break;
 284
 285           case __NR_close:
 286             result = close(arg1);
 287             errcode = errno;
 288             break;
 289
 290           case __NR_creat:
 291             result = creat((char *) t2h_addr(cb, &s, arg1), arg2);
 292             errcode = errno;
 293             break;
 294
 295           case __NR_link:
 296             result = link((char *) t2h_addr(cb, &s, arg1),
 297                           (char *) t2h_addr(cb, &s, arg2));
 298             errcode = errno;
 299             break;
 300
 301           case __NR_unlink:
 302             result = unlink((char *) t2h_addr(cb, &s, arg1));
 303             errcode = errno;
 304             break;
 305
 306           case __NR_chdir:
 307             result = chdir((char *) t2h_addr(cb, &s, arg1));
 308             errcode = errno;
 309             break;
 310
 311           case __NR_time:
 312             {
 313               time_t t;
 314
 315               if (arg1 == 0)
 316                 {
 317                   result = (int) time(NULL);
 318                   errcode = errno;
 319                 }
 320               else
 321                 {
 322                   result = (int) time(&t);
 323                   errcode = errno;
 324
 325                   if (result != 0)
 326                     break;
 327
 328                   translate_endian((void *) &t, sizeof(t));
 329                   if ((s.write_mem) (cb, &s, arg1, (char *) &t, sizeof(t)) != sizeof(t))
 330                     {
 331                       result = -1;
 332                       errcode = EINVAL;
 333                     }
 334                 }
 335             }
 336             break;
 337
 338           case __NR_mknod:
 339             result = mknod((char *) t2h_addr(cb, &s, arg1),
 340                            (mode_t) arg2, (dev_t) arg3);
 341             errcode = errno;
 342             break;
 343
 344           case __NR_chmod:
 345             result = chmod((char *) t2h_addr(cb, &s, arg1), (mode_t) arg2);
 346             errcode = errno;
 347             break;
 348
 349           case __NR_lchown32:
 350           case __NR_lchown:
 351             result = lchown((char *) t2h_addr(cb, &s, arg1),
 352                             (uid_t) arg2, (gid_t) arg3);
 353             errcode = errno;
 354             break;
 355
 356           case __NR_lseek:
 357             result = (int) lseek(arg1, (off_t) arg2, arg3);
 358             errcode = errno;
 359             break;
 360
 361           case __NR_getpid:
 362             result = getpid();
 363             errcode = errno;
 364             break;
 365
 366           case __NR_getuid32:
 367           case __NR_getuid:
 368             result = getuid();
 369             errcode = errno;
 370             break;
 371
 372           case __NR_utime:
 373             {
 374               struct utimbuf buf;
 375
 376               if (arg2 == 0)
 377                 {
 378                   result = utime((char *) t2h_addr(cb, &s, arg1), NULL);
 379                   errcode = errno;
 380                 }
 381               else
 382                 {
 383                   buf = *((struct utimbuf *) t2h_addr(cb, &s, arg2));
 384                   translate_endian((void *) &buf, sizeof(buf));
 385                   result = utime((char *) t2h_addr(cb, &s, arg1), &buf);
 386                   errcode = errno;
 387                 }
 388             }
 389             break;
 390
 391           case __NR_access:
 392             result = access((char *) t2h_addr(cb, &s, arg1), arg2);
 393             errcode = errno;
 394             break;
 395
 396           case __NR_ftime:
 397             {
 398               struct timeb t;
 399
 400               result = ftime(&t);
 401               errcode = errno;
 402
 403               if (result != 0)
 404                 break;
 405
 406               t.time = conv_endian(t.time);
 407               t.millitm = conv_endian16(t.millitm);
 408               t.timezone = conv_endian16(t.timezone);
 409               t.dstflag = conv_endian16(t.dstflag);
 410               if ((s.write_mem) (cb, &s, arg1, (char *) &t, sizeof(t))
 411                   != sizeof(t))
 412                 {
 413                   result = -1;
 414                   errcode = EINVAL;
 415                 }
 416             }
 417
 418           case __NR_sync:
 419             sync();
 420             result = 0;
 421             break;
 422
 423           case __NR_rename:
 424             result = rename((char *) t2h_addr(cb, &s, arg1),
 425                             (char *) t2h_addr(cb, &s, arg2));
 426             errcode = errno;
 427             break;
 428
 429           case __NR_mkdir:
 430             result = mkdir((char *) t2h_addr(cb, &s, arg1), arg2);
 431             errcode = errno;
 432             break;
 433
 434           case __NR_rmdir:
 435             result = rmdir((char *) t2h_addr(cb, &s, arg1));
 436             errcode = errno;
 437             break;
 438
 439           case __NR_dup:
 440             result = dup(arg1);
 441             errcode = errno;
 442             break;
 443
 444           case __NR_brk:
 445             result = brk((void *) arg1);
 446             errcode = errno;
 447             //result = arg1;
 448             break;
 449
 450           case __NR_getgid32:
 451           case __NR_getgid:
 452             result = getgid();
 453             errcode = errno;
 454             break;
 455
 456           case __NR_geteuid32:
 457           case __NR_geteuid:
 458             result = geteuid();
 459             errcode = errno;
 460             break;
 461
 462           case __NR_getegid32:
 463           case __NR_getegid:
 464             result = getegid();
 465             errcode = errno;
 466             break;
 467
 468           case __NR_ioctl:
 469             result = ioctl(arg1, arg2, arg3);
 470             errcode = errno;
 471             break;
 472
 473           case __NR_fcntl:
 474             result = fcntl(arg1, arg2, arg3);
 475             errcode = errno;
 476             break;
 477
 478           case __NR_dup2:
 479             result = dup2(arg1, arg2);
 480             errcode = errno;
 481             break;
 482
 483           case __NR_getppid:
 484             result = getppid();
 485             errcode = errno;
 486             break;
 487
 488           case __NR_getpgrp:
 489             result = getpgrp();
 490             errcode = errno;
 491             break;
 492
 493           case __NR_getrlimit:
 494             {
 495               struct rlimit rlim;
 496
 497               result = getrlimit(arg1, &rlim);
 498               errcode = errno;
 499
 500               if (result != 0)
 501                 break;
 502
 503               translate_endian((void *) &rlim, sizeof(rlim));
 504               if ((s.write_mem) (cb, &s, arg2, (char *) &rlim, sizeof(rlim))
 505                   != sizeof(rlim))
 506                 {
 507                   result = -1;
 508                   errcode = EINVAL;
 509                 }
 510             }
 511             break;
 512
 513           case __NR_getrusage:
 514             {
 515               struct rusage usage;
 516
 517               result = getrusage(arg1, &usage);
 518               errcode = errno;
 519
 520               if (result != 0)
 521                 break;
 522
 523               translate_endian((void *) &usage, sizeof(usage));
 524               if ((s.write_mem) (cb, &s, arg2, (char *) &usage, sizeof(usage))
 525                   != sizeof(usage))
 526                 {
 527                   result = -1;
 528                   errcode = EINVAL;
 529                 }
 530             }
 531             break;
 532
 533           case __NR_gettimeofday:
 534             {
 535               struct timeval tv;
 536               struct timezone tz;
 537
 538               result = gettimeofday(&tv, &tz);
 539               errcode = errno;
 540
 541               if (result != 0)
 542                 break;
 543
 544               translate_endian((void *) &tv, sizeof(tv));
 545               if ((s.write_mem) (cb, &s, arg1, (char *) &tv, sizeof(tv))
 546                   != sizeof(tv))
 547                 {
 548                   result = -1;
 549                   errcode = EINVAL;
 550                 }
 551
 552               translate_endian((void *) &tz, sizeof(tz));
 553               if ((s.write_mem) (cb, &s, arg2, (char *) &tz, sizeof(tz))
 554                   != sizeof(tz))
 555                 {
 556                   result = -1;
 557                   errcode = EINVAL;
 558                 }
 559             }
 560             break;
 561
 562           case __NR_getgroups32:
 563           case __NR_getgroups:
 564             {
 565               gid_t *list;
 566
 567               if (arg1 > 0)
 568                 list = (gid_t *) malloc(arg1 * sizeof(gid_t));
 569
 570               result = getgroups(arg1, list);
 571               errcode = errno;
 572
 573               if (result != 0)
 574                 break;
 575
 576               translate_endian((void *) list, arg1 * sizeof(gid_t));
 577               if (arg1 > 0)
 578                 if ((s.write_mem) (cb, &s, arg2, (char *) list, arg1 * sizeof(gid_t))
 579                     != arg1 * sizeof(gid_t))
 580                   {
 581                     result = -1;
 582                      errcode = EINVAL;
 583                   }
 584             }
 585             break;
 586
 587           case __NR_select:
 588             {
 589               int n;
 590               fd_set readfds;
 591               fd_set *treadfdsp;
 592               fd_set *hreadfdsp;
 593               fd_set writefds;
 594               fd_set *twritefdsp;
 595               fd_set *hwritefdsp;
 596               fd_set exceptfds;
 597               fd_set *texceptfdsp;
 598               fd_set *hexceptfdsp;
 599               struct timeval *ttimeoutp;
 600               struct timeval timeout;
 601
 602               n = arg1;
 603
 604               treadfdsp = (fd_set *) arg2;
 605               if (treadfdsp != NULL)
 606                 {
 607                   readfds = *((fd_set *) t2h_addr(cb, &s, (unsigned int) treadfdsp));
 608                   translate_endian((void *) &readfds, sizeof(readfds));
 609                   hreadfdsp = &readfds;
 610                 }
 611               else
 612                 hreadfdsp = NULL;
 613
 614               twritefdsp  = (fd_set *) arg3;
 615               if (twritefdsp != NULL)
 616                 {
 617                   writefds = *((fd_set *) t2h_addr(cb, &s, (unsigned int) twritefdsp));
 618                   translate_endian((void *) &writefds, sizeof(writefds));
 619                   hwritefdsp = &writefds;
 620                 }
 621               else
 622                 hwritefdsp = NULL;
 623
 624               texceptfdsp = (fd_set *) arg4;
 625               if (texceptfdsp != NULL)
 626                 {
 627                   exceptfds = *((fd_set *) t2h_addr(cb, &s, (unsigned int) texceptfdsp));
 628                   translate_endian((void *) &exceptfds, sizeof(exceptfds));
 629                   hexceptfdsp = &exceptfds;
 630                 }
 631               else
 632                 hexceptfdsp = NULL;
 633
 634               ttimeoutp = (struct timeval *) arg5;
 635               timeout = *((struct timeval *) t2h_addr(cb, &s, (unsigned int) ttimeoutp));
 636               translate_endian((void *) &timeout, sizeof(timeout));
 637
 638               result = select(n, hreadfdsp, hwritefdsp, hexceptfdsp, &timeout);
 639               errcode = errno;
 640
 641               if (result != 0)
 642                 break;
 643
 644               if (treadfdsp != NULL)
 645                 {
 646                   translate_endian((void *) &readfds, sizeof(readfds));
 647                   if ((s.write_mem) (cb, &s, (unsigned long) treadfdsp,
 648                        (char *) &readfds, sizeof(readfds)) != sizeof(readfds))
 649                     {
 650                       result = -1;
 651                       errcode = EINVAL;
 652                     }
 653                 }
 654
 655               if (twritefdsp != NULL)
 656                 {
 657                   translate_endian((void *) &writefds, sizeof(writefds));
 658                   if ((s.write_mem) (cb, &s, (unsigned long) twritefdsp,
 659                        (char *) &writefds, sizeof(writefds)) != sizeof(writefds))
 660                     {
 661                       result = -1;
 662                       errcode = EINVAL;
 663                     }
 664                 }
 665
 666               if (texceptfdsp != NULL)
 667                 {
 668                   translate_endian((void *) &exceptfds, sizeof(exceptfds));
 669                   if ((s.write_mem) (cb, &s, (unsigned long) texceptfdsp,
 670                        (char *) &exceptfds, sizeof(exceptfds)) != sizeof(exceptfds))
 671                     {
 672                       result = -1;
 673                       errcode = EINVAL;
 674                     }
 675                 }
 676
 677               translate_endian((void *) &timeout, sizeof(timeout));
 678               if ((s.write_mem) (cb, &s, (unsigned long) ttimeoutp,
 679                    (char *) &timeout, sizeof(timeout)) != sizeof(timeout))
 680                 {
 681                   result = -1;
 682                   errcode = EINVAL;
 683                 }
 684             }
 685             break;
 686
 687           case __NR_symlink:
 688             result = symlink((char *) t2h_addr(cb, &s, arg1),
 689                              (char *) t2h_addr(cb, &s, arg2));
 690             errcode = errno;
 691             break;
 692
 693           case __NR_readlink:
 694             result = readlink((char *) t2h_addr(cb, &s, arg1),
 695                               (char *) t2h_addr(cb, &s, arg2),
 696                               arg3);
 697             errcode = errno;
 698             break;
 699
 700           case __NR_readdir:
 701             result = (int) readdir((DIR *) t2h_addr(cb, &s, arg1));
 702             errcode = errno;
 703             break;
 704
 705 #if 0
 706           case __NR_mmap:
 707             {
 708               result = (int) mmap((void *) t2h_addr(cb, &s, arg1),
 709                                   arg2, arg3, arg4, arg5, arg6);
 710               errcode = errno;
 711
 712               if (errno == 0)
 713                 {
 714                   sim_core_attach (sd, NULL,
 715                                    0, access_read_write_exec, 0,
 716                                    result, arg2, 0, NULL, NULL);
 717                 }
 718             }
 719             break;
 720 #endif
 721           case __NR_mmap2:
 722             {
 723               void *addr;
 724               size_t len;
 725               int prot, flags, fildes;
 726               off_t off;
 727
 728               addr   = (void *)  t2h_addr(cb, &s, arg1);
 729               len    = arg2;
 730               prot   = arg3;
 731               flags  = arg4;
 732               fildes = arg5;
 733               off    = arg6 << 12;
 734
 735               result = (int) mmap(addr, len, prot, flags, fildes, off);
 736               errcode = errno;
 737               if (result != -1)
 738                 {
 739                   char c;
 740                   if (sim_core_read_buffer (sd, NULL, read_map, &c, result, 1) == 0)
 741                     sim_core_attach (sd, NULL,
 742                                      0, access_read_write_exec, 0,
 743                                      result, len, 0, NULL, NULL);
 744                 }
 745             }
 746             break;
 747
 748           case __NR_mmap:
 749             {
 750               void *addr;
 751               size_t len;
 752               int prot, flags, fildes;
 753               off_t off;
 754
 755               addr   = *((void **)  t2h_addr(cb, &s, arg1));
 756               len    = *((size_t *) t2h_addr(cb, &s, arg1 + 4));
 757               prot   = *((int *)    t2h_addr(cb, &s, arg1 + 8));
 758               flags  = *((int *)    t2h_addr(cb, &s, arg1 + 12));
 759               fildes = *((int *)    t2h_addr(cb, &s, arg1 + 16));
 760               off    = *((off_t *)  t2h_addr(cb, &s, arg1 + 20));
 761
 762               addr   = (void *) conv_endian((unsigned int) addr);
 763               len    = conv_endian(len);
 764               prot   = conv_endian(prot);
 765               flags  = conv_endian(flags);
 766               fildes = conv_endian(fildes);
 767               off    = conv_endian(off);
 768
 769               //addr   = (void *) t2h_addr(cb, &s, (unsigned int) addr);
 770               result = (int) mmap(addr, len, prot, flags, fildes, off);
 771               errcode = errno;
 772
 773               //if (errno == 0)
 774               if (result != -1)
 775                 {
 776                   char c;
 777                   if (sim_core_read_buffer (sd, NULL, read_map, &c, result, 1) == 0)
 778                     sim_core_attach (sd, NULL,
 779                                      0, access_read_write_exec, 0,
 780                                      result, len, 0, NULL, NULL);
 781                 }
 782             }
 783             break;
 784
 785           case __NR_munmap:
 786             {
 787             result = munmap((void *)arg1, arg2);
 788             errcode = errno;
 789             if (result != -1)
 790               {
 791                 sim_core_detach (sd, NULL, 0, arg2, result);
 792               }
 793             }
 794             break;
 795
 796           case __NR_truncate:
 797             result = truncate((char *) t2h_addr(cb, &s, arg1), arg2);
 798             errcode = errno;
 799             break;
 800
 801           case __NR_ftruncate:
 802             result = ftruncate(arg1, arg2);
 803             errcode = errno;
 804             break;
 805
 806           case __NR_fchmod:
 807             result = fchmod(arg1, arg2);
 808             errcode = errno;
 809             break;
 810
 811           case __NR_fchown32:
 812           case __NR_fchown:
 813             result = fchown(arg1, arg2, arg3);
 814             errcode = errno;
 815             break;
 816
 817           case __NR_statfs:
 818             {
 819               struct statfs statbuf;
 820
 821               result = statfs((char *) t2h_addr(cb, &s, arg1), &statbuf);
 822               errcode = errno;
 823
 824               if (result != 0)
 825                 break;
 826
 827               translate_endian((void *) &statbuf, sizeof(statbuf));
 828               if ((s.write_mem) (cb, &s, arg2, (char *) &statbuf, sizeof(statbuf))
 829                   != sizeof(statbuf))
 830                 {
 831                   result = -1;
 832                   errcode = EINVAL;
 833                 }
 834             }
 835             break;
 836
 837           case __NR_fstatfs:
 838             {
 839               struct statfs statbuf;
 840
 841               result = fstatfs(arg1, &statbuf);
 842               errcode = errno;
 843
 844               if (result != 0)
 845                 break;
 846
 847               translate_endian((void *) &statbuf, sizeof(statbuf));
 848               if ((s.write_mem) (cb, &s, arg2, (char *) &statbuf, sizeof(statbuf))
 849                   != sizeof(statbuf))
 850                 {
 851                   result = -1;
 852                   errcode = EINVAL;
 853                 }
 854             }
 855             break;
 856
 857           case __NR_syslog:
 858             result = syslog(arg1, (char *) t2h_addr(cb, &s, arg2));
 859             errcode = errno;
 860             break;
 861
 862           case __NR_setitimer:
 863             {
 864               struct itimerval value, ovalue;
 865
 866               value = *((struct itimerval *) t2h_addr(cb, &s, arg2));
 867               translate_endian((void *) &value, sizeof(value));
 868
 869               if (arg2 == 0)
 870                 {
 871                   result = setitimer(arg1, &value, NULL);
 872                   errcode = errno;
 873                 }
 874               else
 875                 {
 876                   result = setitimer(arg1, &value, &ovalue);
 877                   errcode = errno;
 878
 879                   if (result != 0)
 880                     break;
 881
 882                   translate_endian((void *) &ovalue, sizeof(ovalue));
 883                   if ((s.write_mem) (cb, &s, arg3, (char *) &ovalue, sizeof(ovalue))
 884                       != sizeof(ovalue))
 885                     {
 886                       result = -1;
 887                       errcode = EINVAL;
 888                     }
 889                 }
 890             }
 891             break;
 892
 893           case __NR_getitimer:
 894             {
 895               struct itimerval value;
 896
 897               result = getitimer(arg1, &value);
 898               errcode = errno;
 899
 900               if (result != 0)
 901                 break;
 902
 903               translate_endian((void *) &value, sizeof(value));
 904               if ((s.write_mem) (cb, &s, arg2, (char *) &value, sizeof(value))
 905                   != sizeof(value))
 906                 {
 907                   result = -1;
 908                   errcode = EINVAL;
 909                 }
 910             }
 911             break;
 912
 913           case __NR_stat:
 914             {
 915               char *buf;
 916               int buflen;
 917               struct stat statbuf;
 918
 919               result = stat((char *) t2h_addr(cb, &s, arg1), &statbuf);
 920               errcode = errno;
 921               if (result < 0)
 922                 break;
 923
 924               buflen = cb_host_to_target_stat (cb, NULL, NULL);
 925               buf = xmalloc (buflen);
 926               if (cb_host_to_target_stat (cb, &statbuf, buf) != buflen)
 927                 {
 928                   /* The translation failed.  This is due to an internal
 929                      host program error, not the target's fault.  */
 930                   free (buf);
 931                   result = -1;
 932                   errcode = ENOSYS;
 933                   break;
 934                 }
 935               if ((s.write_mem) (cb, &s, arg2, buf, buflen) != buflen)
 936                 {
 937                   free (buf);
 938                   result = -1;
 939                   errcode = EINVAL;
 940                   break;
 941                 }
 942               free (buf);
 943             }
 944             break;
 945
 946           case __NR_lstat:
 947             {
 948               char *buf;
 949               int buflen;
 950               struct stat statbuf;
 951
 952               result = lstat((char *) t2h_addr(cb, &s, arg1), &statbuf);
 953               errcode = errno;
 954               if (result < 0)
 955                 break;
 956
 957               buflen = cb_host_to_target_stat (cb, NULL, NULL);
 958               buf = xmalloc (buflen);
 959               if (cb_host_to_target_stat (cb, &statbuf, buf) != buflen)
 960                 {
 961                   /* The translation failed.  This is due to an internal
 962                      host program error, not the target's fault.  */
 963                   free (buf);
 964                   result = -1;
 965                   errcode = ENOSYS;
 966                   break;
 967                 }
 968               if ((s.write_mem) (cb, &s, arg2, buf, buflen) != buflen)
 969                 {
 970                   free (buf);
 971                   result = -1;
 972                   errcode = EINVAL;
 973                   break;
 974                 }
 975               free (buf);
 976             }
 977             break;
 978
 979           case __NR_fstat:
 980             {
 981               char *buf;
 982               int buflen;
 983               struct stat statbuf;
 984
 985               result = fstat(arg1, &statbuf);
 986               errcode = errno;
 987               if (result < 0)
 988                 break;
 989
 990               buflen = cb_host_to_target_stat (cb, NULL, NULL);
 991               buf = xmalloc (buflen);
 992               if (cb_host_to_target_stat (cb, &statbuf, buf) != buflen)
 993                 {
 994                   /* The translation failed.  This is due to an internal
 995                      host program error, not the target's fault.  */
 996                   free (buf);
 997                   result = -1;
 998                   errcode = ENOSYS;
 999                   break;
1000                 }
1001               if ((s.write_mem) (cb, &s, arg2, buf, buflen) != buflen)
1002                 {
1003                   free (buf);
1004                   result = -1;
1005                   errcode = EINVAL;
1006                   break;
1007                 }
1008               free (buf);
1009             }
1010             break;
1011
1012           case __NR_sysinfo:
1013             {
1014               struct sysinfo info;
1015
1016               result = sysinfo(&info);
1017               errcode = errno;
1018
1019               if (result != 0)
1020                 break;
1021
1022               info.uptime    = conv_endian(info.uptime);
1023               info.loads[0]  = conv_endian(info.loads[0]);
1024               info.loads[1]  = conv_endian(info.loads[1]);
1025               info.loads[2]  = conv_endian(info.loads[2]);
1026               info.totalram  = conv_endian(info.totalram);
1027               info.freeram   = conv_endian(info.freeram);
1028               info.sharedram = conv_endian(info.sharedram);
1029               info.bufferram = conv_endian(info.bufferram);
1030               info.totalswap = conv_endian(info.totalswap);
1031               info.freeswap  = conv_endian(info.freeswap);
1032               info.procs     = conv_endian16(info.procs);
1033 #if LINUX_VERSION_CODE >= 0x20400
1034               info.totalhigh = conv_endian(info.totalhigh);
1035               info.freehigh  = conv_endian(info.freehigh);
1036               info.mem_unit  = conv_endian(info.mem_unit);
1037 #endif
1038               if ((s.write_mem) (cb, &s, arg1, (char *) &info, sizeof(info))
1039                   != sizeof(info))
1040                 {
1041                   result = -1;
1042                   errcode = EINVAL;
1043                 }
1044             }
1045             break;
1046
1047 #if 0
1048           case __NR_ipc:
1049             {
1050               result = ipc(arg1, arg2, arg3, arg4,
1051                            (void *) t2h_addr(cb, &s, arg5), arg6);
1052               errcode = errno;
1053             }
1054             break;
1055 #endif
1056
1057           case __NR_fsync:
1058             result = fsync(arg1);
1059             errcode = errno;
1060             break;
1061
1062           case __NR_uname:
1063             /* utsname contains only arrays of char, so it is not necessary
1064                to translate endian. */
1065             result = uname((struct utsname *) t2h_addr(cb, &s, arg1));
1066             errcode = errno;
1067             break;
1068
1069           case __NR_adjtimex:
1070             {
1071               struct timex buf;
1072
1073               result = adjtimex(&buf);
1074               errcode = errno;
1075
1076               if (result != 0)
1077                 break;
1078
1079               translate_endian((void *) &buf, sizeof(buf));
1080               if ((s.write_mem) (cb, &s, arg1, (char *) &buf, sizeof(buf))
1081                   != sizeof(buf))
1082                 {
1083                   result = -1;
1084                   errcode = EINVAL;
1085                 }
1086             }
1087             break;
1088
1089           case __NR_mprotect:
1090             result = mprotect((void *) arg1, arg2, arg3);
1091             errcode = errno;
1092             break;
1093
1094           case __NR_fchdir:
1095             result = fchdir(arg1);
1096             errcode = errno;
1097             break;
1098
1099           case __NR_setfsuid32:
1100           case __NR_setfsuid:
1101             result = setfsuid(arg1);
1102             errcode = errno;
1103             break;
1104
1105           case __NR_setfsgid32:
1106           case __NR_setfsgid:
1107             result = setfsgid(arg1);
1108             errcode = errno;
1109             break;
1110
1111 #if 0
1112           case __NR__llseek:
1113             {
1114               loff_t buf;
1115
1116               result = _llseek(arg1, arg2, arg3, &buf, arg5);
1117               errcode = errno;
1118
1119               if (result != 0)
1120                 break;
1121
1122               translate_endian((void *) &buf, sizeof(buf));
1123               if ((s.write_mem) (cb, &s, t2h_addr(cb, &s, arg4),
1124                                  (char *) &buf, sizeof(buf)) != sizeof(buf))
1125                 {
1126                   result = -1;
1127                   errcode = EINVAL;
1128                 }
1129             }
1130             break;
1131
1132           case __NR_getdents:
1133             {
1134               struct dirent dir;
1135
1136               result = getdents(arg1, &dir, arg3);
1137               errcode = errno;
1138
1139               if (result != 0)
1140                 break;
1141
1142               dir.d_ino = conv_endian(dir.d_ino);
1143               dir.d_off = conv_endian(dir.d_off);
1144               dir.d_reclen = conv_endian16(dir.d_reclen);
1145               if ((s.write_mem) (cb, &s, arg2, (char *) &dir, sizeof(dir))
1146                   != sizeof(dir))
1147                 {
1148                   result = -1;
1149                   errcode = EINVAL;
1150                 }
1151             }
1152             break;
1153 #endif
1154
1155           case __NR_flock:
1156             result = flock(arg1, arg2);
1157             errcode = errno;
1158             break;
1159
1160           case __NR_msync:
1161             result = msync((void *) arg1, arg2, arg3);
1162             errcode = errno;
1163             break;
1164
1165           case __NR_readv:
1166             {
1167               struct iovec vector;
1168
1169               vector = *((struct iovec *) t2h_addr(cb, &s, arg2));
1170               translate_endian((void *) &vector, sizeof(vector));
1171
1172               result = readv(arg1, &vector, arg3);
1173               errcode = errno;
1174             }
1175             break;
1176
1177           case __NR_writev:
1178             {
1179               struct iovec vector;
1180
1181               vector = *((struct iovec *) t2h_addr(cb, &s, arg2));
1182               translate_endian((void *) &vector, sizeof(vector));
1183
1184               result = writev(arg1, &vector, arg3);
1185               errcode = errno;
1186             }
1187             break;
1188
1189           case __NR_fdatasync:
1190             result = fdatasync(arg1);
1191             errcode = errno;
1192             break;
1193
1194           case __NR_mlock:
1195             result = mlock((void *) t2h_addr(cb, &s, arg1), arg2);
1196             errcode = errno;
1197             break;
1198
1199           case __NR_munlock:
1200             result = munlock((void *) t2h_addr(cb, &s, arg1), arg2);
1201             errcode = errno;
1202             break;
1203
1204           case __NR_nanosleep:
1205             {
1206               struct timespec req, rem;
1207
1208               req = *((struct timespec *) t2h_addr(cb, &s, arg2));
1209               translate_endian((void *) &req, sizeof(req));
1210
1211               result = nanosleep(&req, &rem);
1212               errcode = errno;
1213
1214               if (result != 0)
1215                 break;
1216
1217               translate_endian((void *) &rem, sizeof(rem));
1218               if ((s.write_mem) (cb, &s, arg2, (char *) &rem, sizeof(rem))
1219                   != sizeof(rem))
1220                 {
1221                   result = -1;
1222                   errcode = EINVAL;
1223                 }
1224             }
1225             break;
1226
1227           case __NR_mremap: /* FIXME */
1228             result = (int) mremap((void *) t2h_addr(cb, &s, arg1), arg2, arg3, arg4);
1229             errcode = errno;
1230             break;
1231
1232           case __NR_getresuid32:
1233           case __NR_getresuid:
1234             {
1235               uid_t ruid, euid, suid;
1236
1237               result = getresuid(&ruid, &euid, &suid);
1238               errcode = errno;
1239
1240               if (result != 0)
1241                 break;
1242
1243               *((uid_t *) t2h_addr(cb, &s, arg1)) = conv_endian(ruid);
1244               *((uid_t *) t2h_addr(cb, &s, arg2)) = conv_endian(euid);
1245               *((uid_t *) t2h_addr(cb, &s, arg3)) = conv_endian(suid);
1246             }
1247             break;
1248
1249           case __NR_poll:
1250             {
1251               struct pollfd ufds;
1252
1253               ufds = *((struct pollfd *) t2h_addr(cb, &s, arg1));
1254               ufds.fd = conv_endian(ufds.fd);
1255               ufds.events = conv_endian16(ufds.events);
1256               ufds.revents = conv_endian16(ufds.revents);
1257
1258               result = poll(&ufds, arg2, arg3);
1259               errcode = errno;
1260             }
1261             break;
1262
1263           case __NR_getresgid32:
1264           case __NR_getresgid:
1265             {
1266               uid_t rgid, egid, sgid;
1267
1268               result = getresgid(&rgid, &egid, &sgid);
1269               errcode = errno;
1270
1271               if (result != 0)
1272                 break;
1273
1274               *((uid_t *) t2h_addr(cb, &s, arg1)) = conv_endian(rgid);
1275               *((uid_t *) t2h_addr(cb, &s, arg2)) = conv_endian(egid);
1276               *((uid_t *) t2h_addr(cb, &s, arg3)) = conv_endian(sgid);
1277             }
1278             break;
1279
1280           case __NR_pread:
1281             result =  pread(arg1, (void *) t2h_addr(cb, &s, arg2), arg3, arg4);
1282             errcode = errno;
1283             break;
1284
1285           case __NR_pwrite:
1286             result =  pwrite(arg1, (void *) t2h_addr(cb, &s, arg2), arg3, arg4);
1287             errcode = errno;
1288             break;
1289
1290           case __NR_chown32:
1291           case __NR_chown:
1292             result = chown((char *) t2h_addr(cb, &s, arg1), arg2, arg3);
1293             errcode = errno;
1294             break;
1295
1296           case __NR_getcwd:
1297             result = (int) getcwd((char *) t2h_addr(cb, &s, arg1), arg2);
1298             errcode = errno;
1299             break;
1300
1301           case __NR_sendfile:
1302             {
1303               off_t offset;
1304
1305               offset = *((off_t *) t2h_addr(cb, &s, arg3));
1306               offset = conv_endian(offset);
1307
1308               result = sendfile(arg1, arg2, &offset, arg3);
1309               errcode = errno;
1310
1311               if (result != 0)
1312                 break;
1313
1314               *((off_t *) t2h_addr(cb, &s, arg3)) = conv_endian(offset);
1315             }
1316             break;
1317
1318           default:
1319             result = -1;
1320             errcode = ENOSYS;
1321             break;
1322           }
1323
1324         if (result == -1)
1325           m32rbf_h_gr_set (current_cpu, 0, -errcode);
1326         else
1327           m32rbf_h_gr_set (current_cpu, 0, result);
1328         break;
1329       }
1330
1331     case TRAP_BREAKPOINT:
1332       sim_engine_halt (sd, current_cpu, NULL, pc,
1333                        sim_stopped, SIM_SIGTRAP);
1334       break;
1335
1336     case TRAP_FLUSH_CACHE:
1337       /* Do nothing.  */
1338       break;
1339
1340     default :
1341       {
1342         /* Use cr5 as EVB (EIT Vector Base) register.  */
1343         USI new_pc = m32rbf_h_cr_get (current_cpu, 5) + 0x40 + num * 4;
1344         return new_pc;
1345       }
1346     }
1347
1348   /* Fake an "rte" insn.  */
1349   /* FIXME: Should duplicate all of rte processing.  */
1350   return (pc & -4) + 4;
1351 }