sim/frv/sim-if.c

   1 /* Main simulator entry points specific to the FRV.
   2    Copyright (C) 1998-2021 Free Software Foundation, Inc.
   3    Contributed by Red Hat.
   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 #define WANT_CPU
  24 #define WANT_CPU_FRVBF
  25 #include "sim-main.h"
  26 #include <stdlib.h>
  27 #include "sim-options.h"
  28 #include "libiberty.h"
  29 #include "bfd.h"
  30 #include "elf-bfd.h"
  31
  32 static void free_state (SIM_DESC);
  33 static void print_frv_misc_cpu (SIM_CPU *cpu, int verbose);
  34 \f
  35 /* Cover function of sim_state_free to free the cpu buffers as well.  */
  36
  37 static void
  38 free_state (SIM_DESC sd)
  39 {
  40   if (STATE_MODULES (sd) != NULL)
  41     sim_module_uninstall (sd);
  42   sim_cpu_free_all (sd);
  43   sim_state_free (sd);
  44 }
  45
  46 /* Create an instance of the simulator.  */
  47
  48 SIM_DESC
  49 sim_open (SIM_OPEN_KIND kind, host_callback *callback, bfd *abfd,
  50           char * const *argv)
  51 {
  52   char c;
  53   int i;
  54   unsigned long elf_flags = 0;
  55   SIM_DESC sd = sim_state_alloc (kind, callback);
  56
  57   /* The cpu data is kept in a separately allocated chunk of memory.  */
  58   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
  59     {
  60       free_state (sd);
  61       return 0;
  62     }
  63
  64   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  65     {
  66       free_state (sd);
  67       return 0;
  68     }
  69
  70   /* These options override any module options.
  71      Obviously ambiguity should be avoided, however the caller may wish to
  72      augment the meaning of an option.  */
  73   sim_add_option_table (sd, NULL, frv_options);
  74
  75   /* The parser will print an error message for us, so we silently return.  */
  76   if (sim_parse_args (sd, argv) != SIM_RC_OK)
  77     {
  78       free_state (sd);
  79       return 0;
  80     }
  81
  82   /* Allocate core managed memory if none specified by user.
  83      Use address 4 here in case the user wanted address 0 unmapped.  */
  84   if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0)
  85     sim_do_commandf (sd, "memory region 0,0x%lx", FRV_DEFAULT_MEM_SIZE);
  86
  87   /* check for/establish the reference program image */
  88   if (sim_analyze_program (sd,
  89                            (STATE_PROG_ARGV (sd) != NULL
  90                             ? *STATE_PROG_ARGV (sd)
  91                             : NULL),
  92                            abfd) != SIM_RC_OK)
  93     {
  94       free_state (sd);
  95       return 0;
  96     }
  97
  98   /* set machine and architecture correctly instead of defaulting to frv */
  99   {
 100     bfd *prog_bfd = STATE_PROG_BFD (sd);
 101     if (prog_bfd != NULL)
 102       {
 103         struct elf_backend_data *backend_data;
 104
 105         if (bfd_get_arch (prog_bfd) != bfd_arch_frv)
 106           {
 107             sim_io_eprintf (sd, "%s: \"%s\" is not a FRV object file\n",
 108                             STATE_MY_NAME (sd),
 109                             bfd_get_filename (prog_bfd));
 110             free_state (sd);
 111             return 0;
 112           }
 113
 114         backend_data = get_elf_backend_data (prog_bfd);
 115
 116         if (backend_data != NULL)
 117           backend_data->elf_backend_object_p (prog_bfd);
 118
 119         elf_flags = elf_elfheader (prog_bfd)->e_flags;
 120       }
 121   }
 122
 123   /* Establish any remaining configuration options.  */
 124   if (sim_config (sd) != SIM_RC_OK)
 125     {
 126       free_state (sd);
 127       return 0;
 128     }
 129
 130   if (sim_post_argv_init (sd) != SIM_RC_OK)
 131     {
 132       free_state (sd);
 133       return 0;
 134     }
 135
 136   /* Open a copy of the cpu descriptor table.  */
 137   {
 138     CGEN_CPU_DESC cd = frv_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 139                                              CGEN_ENDIAN_BIG);
 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) = sim_cgen_disassemble_insn;
 145         CPU_ELF_FLAGS (cpu) = elf_flags;
 146       }
 147     frv_cgen_init_dis (cd);
 148   }
 149
 150   /* CPU specific initialization.  */
 151   for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 152     {
 153       SIM_CPU* cpu = STATE_CPU (sd, i);
 154       frv_initialize (cpu, sd);
 155     }
 156
 157   return sd;
 158 }
 159
 160 void
 161 frv_sim_close (SIM_DESC sd, int quitting)
 162 {
 163   int i;
 164   /* Terminate cache support.  */
 165   for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 166     {
 167       SIM_CPU* cpu = STATE_CPU (sd, i);
 168       frv_cache_term (CPU_INSN_CACHE (cpu));
 169       frv_cache_term (CPU_DATA_CACHE (cpu));
 170     }
 171 }
 172 \f
 173 SIM_RC
 174 sim_create_inferior (SIM_DESC sd, bfd *abfd, char * const *argv,
 175                      char * const *envp)
 176 {
 177   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 178   SIM_ADDR addr;
 179
 180   if (abfd != NULL)
 181     addr = bfd_get_start_address (abfd);
 182   else
 183     addr = 0;
 184   sim_pc_set (current_cpu, addr);
 185
 186   /* Standalone mode (i.e. `run`) will take care of the argv for us in
 187      sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
 188      with `gdb`), we need to handle it because the user can change the
 189      argv on the fly via gdb's 'run'.  */
 190   if (STATE_PROG_ARGV (sd) != argv)
 191     {
 192       freeargv (STATE_PROG_ARGV (sd));
 193       STATE_PROG_ARGV (sd) = dupargv (argv);
 194     }
 195
 196   return SIM_RC_OK;
 197 }