| 1 | /* Model support. |
| 2 | Copyright (C) 1996-2019 Free Software Foundation, Inc. |
| 3 | Contributed by Cygnus Support. |
| 4 | |
| 5 | This file is part of GDB, the GNU debugger. |
| 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 | #include "sim-main.h" |
| 21 | #include "sim-model.h" |
| 22 | #include "libiberty.h" |
| 23 | #include "sim-options.h" |
| 24 | #include "sim-io.h" |
| 25 | #include "sim-assert.h" |
| 26 | #include "bfd.h" |
| 27 | |
| 28 | static void model_set (sim_cpu *, const SIM_MODEL *); |
| 29 | |
| 30 | static DECLARE_OPTION_HANDLER (model_option_handler); |
| 31 | |
| 32 | static MODULE_INIT_FN sim_model_init; |
| 33 | |
| 34 | enum { |
| 35 | OPTION_MODEL = OPTION_START, |
| 36 | OPTION_MODEL_INFO, |
| 37 | }; |
| 38 | |
| 39 | static const OPTION model_options[] = { |
| 40 | { {"model", required_argument, NULL, OPTION_MODEL}, |
| 41 | '\0', "MODEL", "Specify model to simulate", |
| 42 | model_option_handler, NULL }, |
| 43 | |
| 44 | { {"model-info", no_argument, NULL, OPTION_MODEL_INFO}, |
| 45 | '\0', NULL, "List selectable models", |
| 46 | model_option_handler, NULL }, |
| 47 | { {"info-model", no_argument, NULL, OPTION_MODEL_INFO}, |
| 48 | '\0', NULL, NULL, |
| 49 | model_option_handler, NULL }, |
| 50 | |
| 51 | { {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL, NULL } |
| 52 | }; |
| 53 | |
| 54 | static SIM_RC |
| 55 | model_option_handler (SIM_DESC sd, sim_cpu *cpu, int opt, |
| 56 | char *arg, int is_command) |
| 57 | { |
| 58 | switch (opt) |
| 59 | { |
| 60 | case OPTION_MODEL : |
| 61 | { |
| 62 | const SIM_MODEL *model = sim_model_lookup (arg); |
| 63 | if (! model) |
| 64 | { |
| 65 | sim_io_eprintf (sd, "unknown model `%s'\n", arg); |
| 66 | return SIM_RC_FAIL; |
| 67 | } |
| 68 | sim_model_set (sd, cpu, model); |
| 69 | break; |
| 70 | } |
| 71 | |
| 72 | case OPTION_MODEL_INFO : |
| 73 | { |
| 74 | const SIM_MACH **machp; |
| 75 | const SIM_MODEL *model; |
| 76 | for (machp = & sim_machs[0]; *machp != NULL; ++machp) |
| 77 | { |
| 78 | sim_io_printf (sd, "Models for architecture `%s':\n", |
| 79 | MACH_NAME (*machp)); |
| 80 | for (model = MACH_MODELS (*machp); MODEL_NAME (model) != NULL; |
| 81 | ++model) |
| 82 | sim_io_printf (sd, " %s", MODEL_NAME (model)); |
| 83 | sim_io_printf (sd, "\n"); |
| 84 | } |
| 85 | break; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | return SIM_RC_OK; |
| 90 | } |
| 91 | |
| 92 | SIM_RC |
| 93 | sim_model_install (SIM_DESC sd) |
| 94 | { |
| 95 | SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); |
| 96 | |
| 97 | sim_add_option_table (sd, NULL, model_options); |
| 98 | sim_module_add_init_fn (sd, sim_model_init); |
| 99 | |
| 100 | return SIM_RC_OK; |
| 101 | } |
| 102 | |
| 103 | /* Subroutine of sim_model_set to set the model for one cpu. */ |
| 104 | |
| 105 | static void |
| 106 | model_set (sim_cpu *cpu, const SIM_MODEL *model) |
| 107 | { |
| 108 | CPU_MACH (cpu) = MODEL_MACH (model); |
| 109 | CPU_MODEL (cpu) = model; |
| 110 | (* MACH_INIT_CPU (MODEL_MACH (model))) (cpu); |
| 111 | (* MODEL_INIT (model)) (cpu); |
| 112 | } |
| 113 | |
| 114 | /* Set the current model of CPU to MODEL. |
| 115 | If CPU is NULL, all cpus are set to MODEL. */ |
| 116 | |
| 117 | void |
| 118 | sim_model_set (SIM_DESC sd, sim_cpu *cpu, const SIM_MODEL *model) |
| 119 | { |
| 120 | if (! cpu) |
| 121 | { |
| 122 | int c; |
| 123 | |
| 124 | for (c = 0; c < MAX_NR_PROCESSORS; ++c) |
| 125 | if (STATE_CPU (sd, c)) |
| 126 | model_set (STATE_CPU (sd, c), model); |
| 127 | } |
| 128 | else |
| 129 | { |
| 130 | model_set (cpu, model); |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | /* Look up model named NAME. |
| 135 | Result is pointer to MODEL entry or NULL if not found. */ |
| 136 | |
| 137 | const SIM_MODEL * |
| 138 | sim_model_lookup (const char *name) |
| 139 | { |
| 140 | const SIM_MACH **machp; |
| 141 | const SIM_MODEL *model; |
| 142 | |
| 143 | for (machp = & sim_machs[0]; *machp != NULL; ++machp) |
| 144 | { |
| 145 | for (model = MACH_MODELS (*machp); MODEL_NAME (model) != NULL; ++model) |
| 146 | { |
| 147 | if (strcmp (MODEL_NAME (model), name) == 0) |
| 148 | return model; |
| 149 | } |
| 150 | } |
| 151 | return NULL; |
| 152 | } |
| 153 | |
| 154 | /* Look up machine named NAME. |
| 155 | Result is pointer to MACH entry or NULL if not found. */ |
| 156 | |
| 157 | const SIM_MACH * |
| 158 | sim_mach_lookup (const char *name) |
| 159 | { |
| 160 | const SIM_MACH **machp; |
| 161 | |
| 162 | for (machp = & sim_machs[0]; *machp != NULL; ++machp) |
| 163 | { |
| 164 | if (strcmp (MACH_NAME (*machp), name) == 0) |
| 165 | return *machp; |
| 166 | } |
| 167 | return NULL; |
| 168 | } |
| 169 | |
| 170 | /* Look up a machine via its bfd name. |
| 171 | Result is pointer to MACH entry or NULL if not found. */ |
| 172 | |
| 173 | const SIM_MACH * |
| 174 | sim_mach_lookup_bfd_name (const char *name) |
| 175 | { |
| 176 | const SIM_MACH **machp; |
| 177 | |
| 178 | for (machp = & sim_machs[0]; *machp != NULL; ++machp) |
| 179 | { |
| 180 | if (strcmp (MACH_BFD_NAME (*machp), name) == 0) |
| 181 | return *machp; |
| 182 | } |
| 183 | return NULL; |
| 184 | } |
| 185 | |
| 186 | /* Initialize model support. */ |
| 187 | |
| 188 | static SIM_RC |
| 189 | sim_model_init (SIM_DESC sd) |
| 190 | { |
| 191 | SIM_CPU *cpu; |
| 192 | |
| 193 | if (!WITH_MODEL_P) |
| 194 | return SIM_RC_OK; |
| 195 | |
| 196 | /* If both cpu model and state architecture are set, ensure they're |
| 197 | compatible. If only one is set, set the other. If neither are set, |
| 198 | use the default model. STATE_ARCHITECTURE is the bfd_arch_info data |
| 199 | for the selected "mach" (bfd terminology). */ |
| 200 | |
| 201 | /* Only check cpu 0. STATE_ARCHITECTURE is for that one only. */ |
| 202 | /* ??? At present this only supports homogeneous multiprocessors. */ |
| 203 | cpu = STATE_CPU (sd, 0); |
| 204 | |
| 205 | if (! STATE_ARCHITECTURE (sd) |
| 206 | && ! CPU_MACH (cpu)) |
| 207 | { |
| 208 | /* Set the default model. */ |
| 209 | const SIM_MODEL *model = sim_model_lookup (WITH_DEFAULT_MODEL); |
| 210 | SIM_ASSERT (model != NULL); |
| 211 | sim_model_set (sd, NULL, model); |
| 212 | } |
| 213 | |
| 214 | if (STATE_ARCHITECTURE (sd) |
| 215 | && CPU_MACH (cpu)) |
| 216 | { |
| 217 | if (strcmp (STATE_ARCHITECTURE (sd)->printable_name, |
| 218 | MACH_BFD_NAME (CPU_MACH (cpu))) != 0) |
| 219 | { |
| 220 | sim_io_eprintf (sd, "invalid model `%s' for `%s'\n", |
| 221 | MODEL_NAME (CPU_MODEL (cpu)), |
| 222 | STATE_ARCHITECTURE (sd)->printable_name); |
| 223 | return SIM_RC_FAIL; |
| 224 | } |
| 225 | } |
| 226 | else if (STATE_ARCHITECTURE (sd)) |
| 227 | { |
| 228 | /* Use the default model for the selected machine. |
| 229 | The default model is the first one in the list. */ |
| 230 | const SIM_MACH *mach = sim_mach_lookup_bfd_name (STATE_ARCHITECTURE (sd)->printable_name); |
| 231 | |
| 232 | if (mach == NULL) |
| 233 | { |
| 234 | sim_io_eprintf (sd, "unsupported machine `%s'\n", |
| 235 | STATE_ARCHITECTURE (sd)->printable_name); |
| 236 | return SIM_RC_FAIL; |
| 237 | } |
| 238 | sim_model_set (sd, NULL, MACH_MODELS (mach)); |
| 239 | } |
| 240 | else |
| 241 | { |
| 242 | STATE_ARCHITECTURE (sd) = bfd_scan_arch (MACH_BFD_NAME (CPU_MACH (cpu))); |
| 243 | } |
| 244 | |
| 245 | return SIM_RC_OK; |
| 246 | } |
| 247 | \f |
| 248 | #if !WITH_MODEL_P |
| 249 | /* Set up basic model support. This is a stub for ports that do not define |
| 250 | models. See sim-model.h for more details. */ |
| 251 | const SIM_MACH *sim_machs[] = |
| 252 | { |
| 253 | NULL |
| 254 | }; |
| 255 | #endif |