sim/frv/sim-if.c

   1 /* Main simulator entry points specific to the FRV.
   2    Copyright (C) 1998-2018 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 #define WANT_CPU
  21 #define WANT_CPU_FRVBF
  22 #include "sim-main.h"
  23 #ifdef HAVE_STDLIB_H
  24 #include <stdlib.h>
  25 #endif
  26 #include "sim-options.h"
  27 #include "libiberty.h"
  28 #include "bfd.h"
  29 #include "elf-bfd.h"
  30
  31 static void free_state (SIM_DESC);
  32 static void print_frv_misc_cpu (SIM_CPU *cpu, int verbose);
  33 \f
  34 /* Cover function of sim_state_free to free the cpu buffers as well.  */
  35
  36 static void
  37 free_state (SIM_DESC sd)
  38 {
  39   if (STATE_MODULES (sd) != NULL)
  40     sim_module_uninstall (sd);
  41   sim_cpu_free_all (sd);
  42   sim_state_free (sd);
  43 }
  44
  45 /* Create an instance of the simulator.  */
  46
  47 SIM_DESC
  48 sim_open (kind, callback, abfd, argv)
  49      SIM_OPEN_KIND kind;
  50      host_callback *callback;
  51      bfd *abfd;
  52      char * const *argv;
  53 {
  54   char c;
  55   int i;
  56   unsigned long elf_flags = 0;
  57   SIM_DESC sd = sim_state_alloc (kind, callback);
  58
  59   /* The cpu data is kept in a separately allocated chunk of memory.  */
  60   if (sim_cpu_alloc_all (sd, 1, cgen_cpu_max_extra_bytes ()) != SIM_RC_OK)
  61     {
  62       free_state (sd);
  63       return 0;
  64     }
  65
  66 #if 0 /* FIXME: pc is in mach-specific struct */
  67   /* FIXME: watchpoints code shouldn't need this */
  68   {
  69     SIM_CPU *current_cpu = STATE_CPU (sd, 0);
  70     STATE_WATCHPOINTS (sd)->pc = &(PC);
  71     STATE_WATCHPOINTS (sd)->sizeof_pc = sizeof (PC);
  72   }
  73 #endif
  74
  75   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
  76     {
  77       free_state (sd);
  78       return 0;
  79     }
  80
  81   /* These options override any module options.
  82      Obviously ambiguity should be avoided, however the caller may wish to
  83      augment the meaning of an option.  */
  84   sim_add_option_table (sd, NULL, frv_options);
  85
  86   /* The parser will print an error message for us, so we silently return.  */
  87   if (sim_parse_args (sd, argv) != SIM_RC_OK)
  88     {
  89       free_state (sd);
  90       return 0;
  91     }
  92
  93   /* Allocate core managed memory if none specified by user.
  94      Use address 4 here in case the user wanted address 0 unmapped.  */
  95   if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0)
  96     sim_do_commandf (sd, "memory region 0,0x%lx", FRV_DEFAULT_MEM_SIZE);
  97
  98   /* check for/establish the reference program image */
  99   if (sim_analyze_program (sd,
 100                            (STATE_PROG_ARGV (sd) != NULL
 101                             ? *STATE_PROG_ARGV (sd)
 102                             : NULL),
 103                            abfd) != SIM_RC_OK)
 104     {
 105       free_state (sd);
 106       return 0;
 107     }
 108
 109   /* set machine and architecture correctly instead of defaulting to frv */
 110   {
 111     bfd *prog_bfd = STATE_PROG_BFD (sd);
 112     if (prog_bfd != NULL)
 113       {
 114         struct elf_backend_data *backend_data;
 115
 116         if (bfd_get_arch (prog_bfd) != bfd_arch_frv)
 117           {
 118             sim_io_eprintf (sd, "%s: \"%s\" is not a FRV object file\n",
 119                             STATE_MY_NAME (sd),
 120                             bfd_get_filename (prog_bfd));
 121             free_state (sd);
 122             return 0;
 123           }
 124
 125         backend_data = get_elf_backend_data (prog_bfd);
 126
 127         if (backend_data != NULL)
 128           backend_data->elf_backend_object_p (prog_bfd);
 129
 130         elf_flags = elf_elfheader (prog_bfd)->e_flags;
 131       }
 132   }
 133
 134   /* Establish any remaining configuration options.  */
 135   if (sim_config (sd) != SIM_RC_OK)
 136     {
 137       free_state (sd);
 138       return 0;
 139     }
 140
 141   if (sim_post_argv_init (sd) != SIM_RC_OK)
 142     {
 143       free_state (sd);
 144       return 0;
 145     }
 146
 147   /* Open a copy of the cpu descriptor table.  */
 148   {
 149     CGEN_CPU_DESC cd = frv_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name,
 150                                              CGEN_ENDIAN_BIG);
 151     for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 152       {
 153         SIM_CPU *cpu = STATE_CPU (sd, i);
 154         CPU_CPU_DESC (cpu) = cd;
 155         CPU_DISASSEMBLER (cpu) = sim_cgen_disassemble_insn;
 156         CPU_ELF_FLAGS (cpu) = elf_flags;
 157       }
 158     frv_cgen_init_dis (cd);
 159   }
 160
 161   /* Initialize various cgen things not done by common framework.
 162      Must be done after frv_cgen_cpu_open.  */
 163   cgen_init (sd);
 164
 165   /* CPU specific initialization.  */
 166   for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 167     {
 168       SIM_CPU* cpu = STATE_CPU (sd, i);
 169       frv_initialize (cpu, sd);
 170     }
 171
 172   return sd;
 173 }
 174
 175 void
 176 frv_sim_close (sd, quitting)
 177      SIM_DESC sd;
 178      int quitting;
 179 {
 180   int i;
 181   /* Terminate cache support.  */
 182   for (i = 0; i < MAX_NR_PROCESSORS; ++i)
 183     {
 184       SIM_CPU* cpu = STATE_CPU (sd, i);
 185       frv_cache_term (CPU_INSN_CACHE (cpu));
 186       frv_cache_term (CPU_DATA_CACHE (cpu));
 187     }
 188 }
 189 \f
 190 SIM_RC
 191 sim_create_inferior (sd, abfd, argv, envp)
 192      SIM_DESC sd;
 193      bfd *abfd;
 194      char * const *argv;
 195      char * const *envp;
 196 {
 197   SIM_CPU *current_cpu = STATE_CPU (sd, 0);
 198   SIM_ADDR addr;
 199
 200   if (abfd != NULL)
 201     addr = bfd_get_start_address (abfd);
 202   else
 203     addr = 0;
 204   sim_pc_set (current_cpu, addr);
 205
 206   /* Standalone mode (i.e. `run`) will take care of the argv for us in
 207      sim_open() -> sim_parse_args().  But in debug mode (i.e. 'target sim'
 208      with `gdb`), we need to handle it because the user can change the
 209      argv on the fly via gdb's 'run'.  */
 210   if (STATE_PROG_ARGV (sd) != argv)
 211     {
 212       freeargv (STATE_PROG_ARGV (sd));
 213       STATE_PROG_ARGV (sd) = dupargv (argv);
 214     }
 215
 216   return SIM_RC_OK;
 217 }