| 1 | /* Remote debugging interface for Zilog Z8000 simulator |
| 2 | Copyright 1992,1993 Free Software Foundation, Inc. |
| 3 | Contributed by Cygnus Support. Written by Steve Chamberlain |
| 4 | (sac@cygnus.com). |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "inferior.h" |
| 24 | #include "wait.h" |
| 25 | #include "value.h" |
| 26 | #include <string.h> |
| 27 | #include <ctype.h> |
| 28 | #include <fcntl.h> |
| 29 | #include <signal.h> |
| 30 | #include <setjmp.h> |
| 31 | #include <errno.h> |
| 32 | #include "terminal.h" |
| 33 | #include "target.h" |
| 34 | #include "gdbcore.h" |
| 35 | #include "../sim/z8k/sim.h" |
| 36 | |
| 37 | /* External data declarations */ |
| 38 | extern int stop_soon_quietly; /* for wait_for_inferior */ |
| 39 | |
| 40 | /* Forward data declarations */ |
| 41 | extern struct target_ops sim_ops; /* Forward declaration */ |
| 42 | |
| 43 | void sim_store_register(); |
| 44 | void sim_set_oc(); |
| 45 | |
| 46 | |
| 47 | int |
| 48 | sim_write_inferior_memory (memaddr, myaddr, len) |
| 49 | CORE_ADDR memaddr; |
| 50 | unsigned char *myaddr; |
| 51 | int len; |
| 52 | { |
| 53 | sim_write(memaddr, myaddr, len); |
| 54 | return 1; |
| 55 | } |
| 56 | |
| 57 | static void |
| 58 | store_register(regno) |
| 59 | int regno; |
| 60 | { |
| 61 | if (regno == -1) |
| 62 | { |
| 63 | for (regno = 0; regno < 16; regno++) |
| 64 | { |
| 65 | store_register(regno); |
| 66 | } |
| 67 | } |
| 68 | else |
| 69 | { |
| 70 | sim_store_register(regno,read_register(regno)); |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | |
| 75 | |
| 76 | void |
| 77 | sim_kill(arg,from_tty) |
| 78 | char *arg; |
| 79 | int from_tty; |
| 80 | { |
| 81 | |
| 82 | } |
| 83 | |
| 84 | |
| 85 | |
| 86 | /* |
| 87 | * Download a file specified in 'args', to the sim. |
| 88 | */ |
| 89 | static void |
| 90 | sim_load(args,fromtty) |
| 91 | char *args; |
| 92 | int fromtty; |
| 93 | { |
| 94 | bfd *abfd; |
| 95 | asection *s; |
| 96 | |
| 97 | inferior_pid = 0; |
| 98 | abfd = bfd_openr(args,"coff-z8k"); |
| 99 | |
| 100 | if (!abfd) |
| 101 | { |
| 102 | printf_filtered("Unable to open file %s\n", args); |
| 103 | return; |
| 104 | } |
| 105 | |
| 106 | if (bfd_check_format(abfd, bfd_object) ==0) |
| 107 | { |
| 108 | printf_filtered("File is not an object file\n"); |
| 109 | return ; |
| 110 | } |
| 111 | |
| 112 | s = abfd->sections; |
| 113 | while (s != (asection *)NULL) |
| 114 | { |
| 115 | if (s->flags & SEC_LOAD) |
| 116 | { |
| 117 | int i; |
| 118 | int delta = 4096; |
| 119 | char *buffer = xmalloc(delta); |
| 120 | printf_filtered("%s\t: 0x%4x .. 0x%4x ", |
| 121 | s->name, s->vma, s->vma + s->_raw_size); |
| 122 | for (i = 0; i < s->_raw_size; i+= delta) |
| 123 | { |
| 124 | int sub_delta = delta; |
| 125 | if (sub_delta > s->_raw_size - i) |
| 126 | sub_delta = s->_raw_size - i ; |
| 127 | |
| 128 | bfd_get_section_contents(abfd, s, buffer, i, sub_delta); |
| 129 | sim_write_inferior_memory(s->vma + i, buffer, sub_delta); |
| 130 | printf_filtered("*"); |
| 131 | fflush(stdout); |
| 132 | } |
| 133 | printf_filtered( "\n"); |
| 134 | free(buffer); |
| 135 | } |
| 136 | s = s->next; |
| 137 | } |
| 138 | |
| 139 | sim_set_pc(abfd->start_address); |
| 140 | } |
| 141 | |
| 142 | /* This is called not only when we first attach, but also when the |
| 143 | user types "run" after having attached. */ |
| 144 | static void |
| 145 | sim_create_inferior (execfile, args, env) |
| 146 | char *execfile; |
| 147 | char *args; |
| 148 | char **env; |
| 149 | { |
| 150 | int entry_pt; |
| 151 | |
| 152 | if (args && *args) |
| 153 | error ("Can't pass arguments to remote sim process."); |
| 154 | |
| 155 | if (execfile == 0 || exec_bfd == 0) |
| 156 | error ("No exec file specified"); |
| 157 | |
| 158 | entry_pt = (int) bfd_get_start_address (exec_bfd); |
| 159 | |
| 160 | sim_kill(NULL,NULL); |
| 161 | sim_clear_breakpoints(); |
| 162 | init_wait_for_inferior (); |
| 163 | insert_breakpoints (); |
| 164 | proceed(entry_pt, -1, 0); |
| 165 | } |
| 166 | |
| 167 | |
| 168 | |
| 169 | static void |
| 170 | sim_open (name, from_tty) |
| 171 | char *name; |
| 172 | int from_tty; |
| 173 | { |
| 174 | if(name == 0) |
| 175 | { |
| 176 | name = ""; |
| 177 | } |
| 178 | |
| 179 | /* Clear any break points */ |
| 180 | sim_clear_breakpoints(); |
| 181 | |
| 182 | push_target (&sim_ops); |
| 183 | target_fetch_registers(-1); |
| 184 | |
| 185 | printf_filtered("Connected to the Z8000 Simulator.\n"); |
| 186 | } |
| 187 | |
| 188 | /* Close out all files and local state before this target loses control. */ |
| 189 | |
| 190 | static void |
| 191 | sim_close (quitting) |
| 192 | int quitting; |
| 193 | { |
| 194 | sim_clear_breakpoints(); |
| 195 | } |
| 196 | |
| 197 | /* Terminate the open connection to the remote debugger. |
| 198 | Use this when you want to detach and do something else |
| 199 | with your gdb. */ |
| 200 | static void |
| 201 | sim_detach (args,from_tty) |
| 202 | char *args; |
| 203 | int from_tty; |
| 204 | { |
| 205 | sim_clear_breakpoints(); |
| 206 | |
| 207 | pop_target(); /* calls sim_close to do the real work */ |
| 208 | if (from_tty) |
| 209 | printf_filtered ("Ending remote %s debugging\n", target_shortname); |
| 210 | } |
| 211 | |
| 212 | /* Tell the remote machine to resume. */ |
| 213 | |
| 214 | |
| 215 | /* Wait until the remote machine stops, then return, |
| 216 | storing status in STATUS just as `wait' would. */ |
| 217 | |
| 218 | int |
| 219 | sim_wait (status) |
| 220 | WAITTYPE *status; |
| 221 | { |
| 222 | *status = sim_stop_signal(); |
| 223 | return 0; |
| 224 | } |
| 225 | |
| 226 | |
| 227 | /* Get ready to modify the registers array. On machines which store |
| 228 | individual registers, this doesn't need to do anything. On machines |
| 229 | which store all the registers in one fell swoop, this makes sure |
| 230 | that registers contains all the registers from the program being |
| 231 | debugged. */ |
| 232 | |
| 233 | static void |
| 234 | sim_prepare_to_store () |
| 235 | { |
| 236 | /* Do nothing, since we can store individual regs */ |
| 237 | } |
| 238 | |
| 239 | |
| 240 | static void |
| 241 | fetch_register(regno) |
| 242 | int regno; |
| 243 | { |
| 244 | if (regno == -1) |
| 245 | { |
| 246 | for (regno = 0; regno < 16; regno++) |
| 247 | fetch_register(regno); |
| 248 | } |
| 249 | else { |
| 250 | char buf[MAX_REGISTER_RAW_SIZE]; |
| 251 | sim_fetch_register(regno, buf); |
| 252 | supply_register(regno, buf); |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | /* Write a word WORD into remote address ADDR. |
| 257 | This goes through the data cache. */ |
| 258 | |
| 259 | void |
| 260 | sim_store_word (addr, word) |
| 261 | CORE_ADDR addr; |
| 262 | int word; |
| 263 | { |
| 264 | /* dcache_poke (addr, word);*/ |
| 265 | } |
| 266 | |
| 267 | int |
| 268 | sim_xfer_inferior_memory(memaddr, myaddr, len, write, target) |
| 269 | CORE_ADDR memaddr; |
| 270 | char *myaddr; |
| 271 | int len; |
| 272 | int write; |
| 273 | struct target_ops *target; /* ignored */ |
| 274 | { |
| 275 | if (write) |
| 276 | { |
| 277 | sim_write(memaddr, myaddr, len); |
| 278 | |
| 279 | } |
| 280 | else |
| 281 | { |
| 282 | sim_read(memaddr, myaddr, len); |
| 283 | } |
| 284 | return len; |
| 285 | } |
| 286 | |
| 287 | void |
| 288 | sim_files_info () |
| 289 | { |
| 290 | char *file = "nothing"; |
| 291 | if (exec_bfd) |
| 292 | file = bfd_get_filename(exec_bfd); |
| 293 | |
| 294 | printf_filtered("\tAttached to %s running on the z8k simulator\n",file); |
| 295 | } |
| 296 | |
| 297 | /* This routine is run as a hook, just before the main command loop is |
| 298 | entered. If gdb is configured for the H8, but has not had its |
| 299 | target specified yet, this will loop prompting the user to do so. |
| 300 | */ |
| 301 | |
| 302 | void |
| 303 | sim_before_main_loop () |
| 304 | { |
| 305 | push_target (&sim_ops); |
| 306 | } |
| 307 | |
| 308 | |
| 309 | /* Clear the sims notion of what the break points are */ |
| 310 | static void |
| 311 | sim_mourn() |
| 312 | { |
| 313 | sim_clear_breakpoints(); |
| 314 | generic_mourn_inferior (); |
| 315 | } |
| 316 | |
| 317 | static void rem_resume(a,b) |
| 318 | int a; |
| 319 | int b; |
| 320 | { |
| 321 | sim_resume(a,b); |
| 322 | } |
| 323 | |
| 324 | /* Define the target subroutine names */ |
| 325 | |
| 326 | struct target_ops sim_ops = |
| 327 | { |
| 328 | "sim", "Remote SIM monitor", |
| 329 | "Use the Z8000 simulator", |
| 330 | sim_open, sim_close, |
| 331 | 0, sim_detach, rem_resume, sim_wait, /* attach */ |
| 332 | fetch_register, store_register, |
| 333 | sim_prepare_to_store, |
| 334 | sim_xfer_inferior_memory, |
| 335 | sim_files_info, |
| 336 | 0, 0, /* Breakpoints */ |
| 337 | 0, 0, 0, 0, 0, /* Terminal handling */ |
| 338 | sim_kill, /* FIXME, kill */ |
| 339 | sim_load, |
| 340 | 0, /* lookup_symbol */ |
| 341 | sim_create_inferior, /* create_inferior */ |
| 342 | sim_mourn, /* mourn_inferior FIXME */ |
| 343 | 0, /* can_run */ |
| 344 | 0, /* notice_signals */ |
| 345 | process_stratum, 0, /* next */ |
| 346 | 1, 1, 1, 1, 1, /* all mem, mem, stack, regs, exec */ |
| 347 | 0,0, /* Section pointers */ |
| 348 | OPS_MAGIC, /* Always the last thing */ |
| 349 | }; |
| 350 | |
| 351 | |
| 352 | |
| 353 | |
| 354 | |
| 355 | |
| 356 | /***********************************************************************/ |
| 357 | |
| 358 | void |
| 359 | _initialize_remote_sim () |
| 360 | { |
| 361 | extern int sim_z8001_mode; |
| 362 | sim_z8001_mode = z8001_mode; |
| 363 | add_target (&sim_ops); |
| 364 | } |
| 365 | |
| 366 | |