sim/iq2000/sim-if.c

   1 /* Main simulator entry points specific to the IQ2000.
   2    Copyright (C) 2000-2021 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 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 "sim-main.h"
  24
  25 #include <stdlib.h>
  26
  27 #include "sim-options.h"
  28 #include "libiberty.h"
  29 #include "bfd.h"
  30
  31 static void free_state (SIM_DESC);
  32 \f
  33 /* Cover function for sim_cgen_disassemble_insn.  */
  34
  35 void
  36 iq2000bf_disassemble_insn (SIM_CPU *cpu, const CGEN_INSN *insn,
  37                           const ARGBUF *abuf, IADDR pc, char *buf)
  38 {
  39   sim_cgen_disassemble_insn(cpu, insn, abuf, pc, buf);
  40 }
  41
  42 /* Cover function of sim_state_free to free the cpu buffers as well.  */
  43
  44 static void
  45 free_state (SIM_DESC sd)
  46 {
  47   if (STATE_MODULES (sd) != NULL)
  48     sim_module_uninstall (sd);
  49   sim_cpu_free_all (sd);
  50   sim_state_free (sd);
  51 }
  52
  53 /* Create an instance of the simulator.  */
  54
  55 SIM_DESC
  56 sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd,
  57           char * const *argv)
  58 {
  59   char c;
  60   int i;
  61   SIM_DESC sd = sim_state_alloc (kind, callback);
  62
  63   /* Set default options before parsing user options.  */
  64   current_alignment = STRICT_ALIGNMENT;
  65   current_target_byte_order = BFD_ENDIAN_BIG;
  66
  67   /* The cpu data is kept in a separately allocated chunk of memory.  */
  68   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
  69     {
  70       free_state (sd);
  71       return 0;
  72     }
  73
  74   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  75     {
  76       free_state (sd);
  77       return 0;
  78     }
  79
  80   /* The parser will print an error message for us, so we silently return.  */
  81   if (sim_parse_args (sd, argv) != SIM_RC_OK)
  82     {
  83       free_state (sd);
  84       return 0;
  85     }
  86
  87   /* Allocate core managed memory.  */
  88   sim_do_commandf (sd, "memory region 0x%lx,0x%lx", IQ2000_INSN_VALUE, IQ2000_INSN_MEM_SIZE);
  89   sim_do_commandf (sd, "memory region 0x%lx,0x%lx", IQ2000_DATA_VALUE, IQ2000_DATA_MEM_SIZE);
  90
  91   /* check for/establish the reference program image */
  92   if (sim_analyze_program (sd,
  93                            (STATE_PROG_ARGV (sd) != NULL
  94                             ? *STATE_PROG_ARGV (sd)
  95                             : NULL),
  96                            abfd) != SIM_RC_OK)
  97     {
  98       free_state (sd);
  99       return 0;
 100     }
 101
 102   /* Establish any remaining configuration options.  */
 103   if (sim_config (sd) != SIM_RC_OK)
 104     {
 105       free_state (sd);
 106       return 0;
 107     }
 108
 109   if (sim_post_argv_init (sd) != SIM_RC_OK)
 110     {
 111       free_state (sd);
 112       return 0;
 113     }
 114
 115   /* Open a copy of the cpu descriptor table.  */
 116   {
 117     CGEN_CPU_DESC cd = iq2000_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 118                                               CGEN_ENDIAN_BIG);
 119
 120     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 121       {
 122         SIM_CPU *cpu = STATE_CPU (sd, i);
 123         CPU_CPU_DESC (cpu) = cd;
 124         CPU_DISASSEMBLER (cpu) = iq2000bf_disassemble_insn;
 125       }
 126     iq2000_cgen_init_dis (cd);
 127   }
 128
 129   return sd;
 130 }
 131 \f
 132 SIM_RC
 133 sim_create_inferior (SIM_DESC sd, struct bfd *abfd, char * const *argv,
 134                      char * const *envp)
 135 {
 136   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 137   SIM_ADDR addr;
 138
 139   if (abfd != NULL)
 140     addr = bfd_get_start_address (abfd);
 141   else
 142     addr = CPU2INSN(0);
 143   sim_pc_set (current_cpu, addr);
 144
 145   /* Standalone mode (i.e. `run`) will take care of the argv for us in
 146      sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
 147      with `gdb`), we need to handle it because the user can change the
 148      argv on the fly via gdb's 'run'.  */
 149   if (STATE_PROG_ARGV (sd) != argv)
 150     {
 151       freeargv (STATE_PROG_ARGV (sd));
 152       STATE_PROG_ARGV (sd) = dupargv (argv);
 153     }
 154
 155   return SIM_RC_OK;
 156 }