sim/z8k/iface.c

   1 /* gdb->simulator interface.
   2    Copyright (C) 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
   3
   4 This file is part of Z8KSIM
   5
   6 Z8KSIM is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 Z8KSIM is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with Z8KZIM; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #include "ansidecl.h"
  21 #include "sim.h"
  22 #include "tm.h"
  23 #include "signal.h"
  24 #include "bfd.h"
  25 #include "callback.h"
  26 #include "remote-sim.h"
  27
  28 #ifndef NULL
  29 #define NULL 0
  30 #endif
  31
  32 host_callback *z8k_callback;
  33
  34 static SIM_OPEN_KIND sim_kind;
  35 static char *myname;
  36
  37 void
  38 sim_size (n)
  39      int n;
  40 {
  41   /* Size is fixed.  */
  42 }
  43
  44 int
  45 sim_store_register (sd, regno, value, length)
  46      SIM_DESC sd;
  47      int regno;
  48      unsigned char *value;
  49      int length;
  50 {
  51   /* FIXME: Review the computation of regval.  */
  52   int regval = (value[0] << 24) | (value[1] << 16) | (value[2] << 8) | value[3];
  53
  54   tm_store_register (regno, regval);
  55   return -1;
  56 }
  57
  58 int
  59 sim_fetch_register (sd, regno, buf, length)
  60      SIM_DESC sd;
  61      int regno;
  62      unsigned char *buf;
  63      int length;
  64 {
  65   tm_fetch_register (regno, buf);
  66   return -1;
  67 }
  68
  69 int
  70 sim_write (sd, where, what, howmuch)
  71      SIM_DESC sd;
  72      SIM_ADDR where;
  73      unsigned char *what;
  74      int howmuch;
  75 {
  76   int i;
  77
  78   for (i = 0; i < howmuch; i++)
  79     tm_write_byte (where + i, what[i]);
  80   return howmuch;
  81 }
  82
  83 int
  84 sim_read (sd, where, what, howmuch)
  85      SIM_DESC sd;
  86      SIM_ADDR where;
  87      unsigned char *what;
  88      int howmuch;
  89 {
  90   int i;
  91
  92   for (i = 0; i < howmuch; i++)
  93     what[i] = tm_read_byte (where + i);
  94   return howmuch;
  95 }
  96
  97 static void
  98 control_c (sig, code, scp, addr)
  99      int sig;
 100      int code;
 101      char *scp;
 102      char *addr;
 103 {
 104   tm_exception (SIM_INTERRUPT);
 105 }
 106
 107 int
 108 sim_stop (sd)
 109      SIM_DESC sd;
 110 {
 111   tm_exception (SIM_INTERRUPT);
 112   return 1;
 113 }
 114
 115 void
 116 sim_resume (sd, step, sig)
 117      SIM_DESC sd;
 118      int step;
 119      int sig;
 120 {
 121   void (*prev) ();
 122
 123   prev = signal (SIGINT, control_c);
 124   tm_resume (step);
 125   signal (SIGINT, prev);
 126 }
 127
 128 void
 129 sim_stop_reason (sd, reason, sigrc)
 130      SIM_DESC sd;
 131      enum sim_stop *reason;
 132      int *sigrc;
 133 {
 134   switch (tm_signal ())
 135     {
 136     case SIM_DIV_ZERO:
 137       *sigrc = SIGFPE;
 138       break;
 139     case SIM_INTERRUPT:
 140       *sigrc = SIGINT;
 141       break;
 142     case SIM_BAD_INST:
 143       *sigrc = SIGILL;
 144       break;
 145     case SIM_BREAKPOINT:
 146       *sigrc = SIGTRAP;
 147       break;
 148     case SIM_SINGLE_STEP:
 149       *sigrc = SIGTRAP;
 150       break;
 151     case SIM_BAD_SYSCALL:
 152       *sigrc = SIGILL;
 153       break;
 154     case SIM_BAD_ALIGN:
 155       *sigrc = SIGSEGV;
 156       break;
 157     case SIM_DONE:
 158       {
 159         sim_state_type x;
 160         tm_state (&x);
 161         *sigrc = x.regs[2].word & 255;
 162         *reason = sim_exited;
 163         return;
 164       }
 165     default:
 166       abort ();
 167     }
 168   *reason = sim_stopped;
 169 }
 170
 171 void
 172 sim_info (sd, verbose)
 173      SIM_DESC sd;
 174      int verbose;
 175 {
 176   sim_state_type x;
 177
 178   tm_state (&x);
 179   tm_info_print (&x);
 180 }
 181
 182 SIM_DESC
 183 sim_open (kind, cb, abfd, argv)
 184      SIM_OPEN_KIND kind;
 185      host_callback *cb;
 186      struct _bfd *abfd;
 187      char **argv;
 188 {
 189   /* FIXME: The code in sim_load that determines the exact z8k arch
 190      should be moved to here */
 191
 192   sim_kind = kind;
 193   myname = argv[0];
 194   z8k_callback = cb;
 195
 196   /* fudge our descriptor for now */
 197   return (SIM_DESC) 1;
 198 }
 199
 200 void
 201 sim_close (sd, quitting)
 202      SIM_DESC sd;
 203      int quitting;
 204 {
 205   /* nothing to do */
 206 }
 207
 208 SIM_RC
 209 sim_load (sd, prog, abfd, from_tty)
 210      SIM_DESC sd;
 211      char *prog;
 212      bfd *abfd;
 213      int from_tty;
 214 {
 215   extern bfd *sim_load_file (); /* ??? Don't know where this should live.  */
 216   bfd *prog_bfd;
 217
 218   /* FIXME: The code determining the type of z9k processor should be
 219      moved from here to sim_open. */
 220
 221   prog_bfd = sim_load_file (sd, myname, z8k_callback, prog, abfd,
 222                             sim_kind == SIM_OPEN_DEBUG,
 223                             0, sim_write);
 224   if (prog_bfd == NULL)
 225     return SIM_RC_FAIL;
 226   if (bfd_get_mach (prog_bfd) == bfd_mach_z8001)
 227     {
 228       extern int sim_z8001_mode;
 229       sim_z8001_mode = 1;
 230     }
 231   /* Close the bfd if we opened it.  */
 232   if (abfd == NULL)
 233     bfd_close (prog_bfd);
 234   return SIM_RC_OK;
 235 }
 236
 237 SIM_RC
 238 sim_create_inferior (sd, abfd, argv, env)
 239      SIM_DESC sd;
 240      struct _bfd *abfd;
 241      char **argv;
 242      char **env;
 243 {
 244   if (abfd != NULL)
 245     tm_store_register (REG_PC, bfd_get_start_address (abfd));
 246   else
 247     tm_store_register (REG_PC, 0);
 248   return SIM_RC_OK;
 249 }
 250
 251 void
 252 sim_do_command (sd, cmd)
 253      SIM_DESC sd;
 254      char *cmd;
 255 {
 256 }
 257
 258 void
 259 sim_set_callbacks (ptr)
 260      host_callback *ptr;
 261 {
 262   z8k_callback = ptr;
 263 }