gnu/dist/gdb6/sim/iq2000/sim-if.c

   1 /* Main simulator entry points specific to the IQ2000.
   2    Copyright (C) 2000 Free Software Foundation, Inc.
   3    Contributed by Cygnus Solutions.
   4
   5 This file is part of the GNU simulators.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with this program; if not, write to the Free Software Foundation, Inc.,
  19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #include "sim-main.h"
  22 #ifdef HAVE_STDLIB_H
  23 #include <stdlib.h>
  24 #endif
  25 #include "sim-options.h"
  26 #include "libiberty.h"
  27 #include "bfd.h"
  28
  29 static void free_state (SIM_DESC);
  30
  31 /* Records simulator descriptor so utilities like iq2000_dump_regs can be
  32    called from gdb.  */
  33 SIM_DESC current_state;
  34 \f
  35 /* Cover function for sim_cgen_disassemble_insn.  */
  36
  37 void
  38 iq2000bf_disassemble_insn (SIM_CPU *cpu, const CGEN_INSN *insn,
  39                           const ARGBUF *abuf, IADDR pc, char *buf)
  40 {
  41   sim_cgen_disassemble_insn(cpu, insn, abuf, pc, buf);
  42 }
  43
  44 /* Cover function of sim_state_free to free the cpu buffers as well.  */
  45
  46 static void
  47 free_state (SIM_DESC sd)
  48 {
  49   if (STATE_MODULES (sd) != NULL)
  50     sim_module_uninstall (sd);
  51   sim_cpu_free_all (sd);
  52   sim_state_free (sd);
  53 }
  54
  55 /* Create an instance of the simulator.  */
  56
  57 SIM_DESC
  58 sim_open (kind, callback, abfd, argv)
  59      SIM_OPEN_KIND kind;
  60      host_callback *callback;
  61      struct bfd *abfd;
  62      char **argv;
  63 {
  64   char c;
  65   int i;
  66   SIM_DESC sd = sim_state_alloc (kind, callback);
  67
  68   /* The cpu data is kept in a separately allocated chunk of memory.  */
  69   if (sim_cpu_alloc_all (sd, 1, cgen_cpu_max_extra_bytes ()) != SIM_RC_OK)
  70     {
  71       free_state (sd);
  72       return 0;
  73     }
  74
  75 #if 0 /* FIXME: pc is in mach-specific struct */
  76   /* FIXME: watchpoints code shouldn't need this */
  77   {
  78     SIM_CPU *current_cpu = STATE_CPU (sd, 0);
  79     STATE_WATCHPOINTS (sd)->pc = &(PC);
  80     STATE_WATCHPOINTS (sd)->sizeof_pc = sizeof (PC);
  81   }
  82 #endif
  83
  84   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  85     {
  86       free_state (sd);
  87       return 0;
  88     }
  89
  90 #if 0 /* FIXME: 'twould be nice if we could do this */
  91   /* These options override any module options.
  92      Obviously ambiguity should be avoided, however the caller may wish to
  93      augment the meaning of an option.  */
  94   if (extra_options != NULL)
  95     sim_add_option_table (sd, extra_options);
  96 #endif
  97
  98   /* getopt will print the error message so we just have to exit if this fails.
  99      FIXME: Hmmm...  in the case of gdb we need getopt to call
 100      print_filtered.  */
 101   if (sim_parse_args (sd, argv) != SIM_RC_OK)
 102     {
 103       free_state (sd);
 104       return 0;
 105     }
 106
 107   /* Allocate core managed memory.  */
 108   sim_do_commandf (sd, "memory region 0x%lx,0x%lx", IQ2000_INSN_VALUE, IQ2000_INSN_MEM_SIZE);
 109   sim_do_commandf (sd, "memory region 0x%lx,0x%lx", IQ2000_DATA_VALUE, IQ2000_DATA_MEM_SIZE);
 110
 111   /* check for/establish the reference program image */
 112   if (sim_analyze_program (sd,
 113                            (STATE_PROG_ARGV (sd) != NULL
 114                             ? *STATE_PROG_ARGV (sd)
 115                             : NULL),
 116                            abfd) != SIM_RC_OK)
 117     {
 118       free_state (sd);
 119       return 0;
 120     }
 121
 122   /* Establish any remaining configuration options.  */
 123   if (sim_config (sd) != SIM_RC_OK)
 124     {
 125       free_state (sd);
 126       return 0;
 127     }
 128
 129   if (sim_post_argv_init (sd) != SIM_RC_OK)
 130     {
 131       free_state (sd);
 132       return 0;
 133     }
 134
 135   /* Open a copy of the cpu descriptor table.  */
 136   {
 137     CGEN_CPU_DESC cd = iq2000_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 138                                               CGEN_ENDIAN_BIG);
 139
 140     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 141       {
 142         SIM_CPU *cpu = STATE_CPU (sd, i);
 143         CPU_CPU_DESC (cpu) = cd;
 144         CPU_DISASSEMBLER (cpu) = iq2000bf_disassemble_insn;
 145       }
 146     iq2000_cgen_init_dis (cd);
 147   }
 148
 149   /* Initialize various cgen things not done by common framework.
 150      Must be done after iq2000_cgen_cpu_open.  */
 151   cgen_init (sd);
 152
 153   /* Store in a global so things like sparc32_dump_regs can be invoked
 154      from the gdb command line.  */
 155   current_state = sd;
 156
 157   return sd;
 158 }
 159
 160 void
 161 sim_close (sd, quitting)
 162      SIM_DESC sd;
 163      int quitting;
 164 {
 165   iq2000_cgen_cpu_close (CPU_CPU_DESC (STATE_CPU (sd, 0)));
 166   sim_module_uninstall (sd);
 167 }
 168 \f
 169 SIM_RC
 170 sim_create_inferior (sd, abfd, argv, envp)
 171      SIM_DESC sd;
 172      struct bfd *abfd;
 173      char **argv;
 174      char **envp;
 175 {
 176   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 177   SIM_ADDR addr;
 178
 179   if (abfd != NULL)
 180     addr = bfd_get_start_address (abfd);
 181   else
 182     addr = CPU2INSN(0);
 183   sim_pc_set (current_cpu, addr);
 184
 185 #if 0
 186   STATE_ARGV (sd) = sim_copy_argv (argv);
 187   STATE_ENVP (sd) = sim_copy_argv (envp);
 188 #endif
 189
 190   return SIM_RC_OK;
 191 }
 192
 193 void
 194 sim_do_command (sd, cmd)
 195      SIM_DESC sd;
 196      char *cmd;
 197 {
 198   if (sim_args_command (sd, cmd) != SIM_RC_OK)
 199     sim_io_eprintf (sd, "Unknown command `%s'\n", cmd);
 200 }
 201
 202
 203