| 1 | /* This file is part of the program psim. |
| 2 | |
| 3 | Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au> |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 3 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program; if not, see <http://www.gnu.org/licenses/>. |
| 17 | |
| 18 | */ |
| 19 | |
| 20 | |
| 21 | #include <stdarg.h> |
| 22 | #include <stdio.h> |
| 23 | #include <fcntl.h> |
| 24 | |
| 25 | #include <signal.h> |
| 26 | |
| 27 | #include "psim.h" |
| 28 | #include "options.h" |
| 29 | #include "device.h" /* FIXME: psim should provide the interface */ |
| 30 | #include "events.h" /* FIXME: psim should provide the interface */ |
| 31 | |
| 32 | #include "bfd.h" |
| 33 | #include "gdb/callback.h" |
| 34 | #include "gdb/remote-sim.h" |
| 35 | |
| 36 | #ifdef HAVE_STDLIB_H |
| 37 | #include <stdlib.h> |
| 38 | #endif |
| 39 | |
| 40 | #ifdef HAVE_UNISTD_H |
| 41 | #include <unistd.h> |
| 42 | #endif |
| 43 | |
| 44 | #ifdef HAVE_STRING_H |
| 45 | #include <string.h> |
| 46 | #else |
| 47 | #ifdef HAVE_STRINGS_H |
| 48 | #include <strings.h> |
| 49 | #endif |
| 50 | #endif |
| 51 | |
| 52 | #include <errno.h> |
| 53 | |
| 54 | #if !defined(O_NDELAY) || !defined(F_GETFL) || !defined(F_SETFL) |
| 55 | #undef WITH_STDIO |
| 56 | #define WITH_STDIO DO_USE_STDIO |
| 57 | #endif |
| 58 | |
| 59 | |
| 60 | extern char **environ; |
| 61 | |
| 62 | static psim *simulation = NULL; |
| 63 | |
| 64 | |
| 65 | void |
| 66 | sim_io_poll_quit (void) |
| 67 | { |
| 68 | /* nothing to do */ |
| 69 | } |
| 70 | |
| 71 | void |
| 72 | sim_io_printf_filtered(const char *msg, ...) |
| 73 | { |
| 74 | va_list ap; |
| 75 | va_start(ap, msg); |
| 76 | vprintf(msg, ap); |
| 77 | va_end(ap); |
| 78 | } |
| 79 | |
| 80 | void |
| 81 | error (const char *msg, ...) |
| 82 | { |
| 83 | va_list ap; |
| 84 | va_start(ap, msg); |
| 85 | vprintf(msg, ap); |
| 86 | printf("\n"); |
| 87 | va_end(ap); |
| 88 | |
| 89 | /* any final clean up */ |
| 90 | if (ppc_trace[trace_print_info] && simulation != NULL) |
| 91 | psim_print_info (simulation, ppc_trace[trace_print_info]); |
| 92 | |
| 93 | exit (1); |
| 94 | } |
| 95 | |
| 96 | int |
| 97 | sim_io_write_stdout(const char *buf, |
| 98 | int sizeof_buf) |
| 99 | { |
| 100 | switch (CURRENT_STDIO) { |
| 101 | case DO_USE_STDIO: |
| 102 | { |
| 103 | int i; |
| 104 | for (i = 0; i < sizeof_buf; i++) { |
| 105 | putchar(buf[i]); |
| 106 | } |
| 107 | return i; |
| 108 | } |
| 109 | break; |
| 110 | case DONT_USE_STDIO: |
| 111 | return write(1, buf, sizeof_buf); |
| 112 | break; |
| 113 | default: |
| 114 | error("sim_io_write_stdout: invalid switch\n"); |
| 115 | } |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | int |
| 120 | sim_io_write_stderr(const char *buf, |
| 121 | int sizeof_buf) |
| 122 | { |
| 123 | switch (CURRENT_STDIO) { |
| 124 | case DO_USE_STDIO: |
| 125 | { |
| 126 | int i; |
| 127 | for (i = 0; i < sizeof_buf; i++) { |
| 128 | fputc(buf[i], stderr); |
| 129 | } |
| 130 | return i; |
| 131 | } |
| 132 | break; |
| 133 | case DONT_USE_STDIO: |
| 134 | return write(2, buf, sizeof_buf); |
| 135 | break; |
| 136 | default: |
| 137 | error("sim_io_write_stdout: invalid switch\n"); |
| 138 | } |
| 139 | return 0; |
| 140 | } |
| 141 | |
| 142 | int |
| 143 | sim_io_read_stdin(char *buf, |
| 144 | int sizeof_buf) |
| 145 | { |
| 146 | switch (CURRENT_STDIO) { |
| 147 | case DO_USE_STDIO: |
| 148 | if (sizeof_buf > 1) { |
| 149 | if (fgets(buf, sizeof_buf, stdin) != NULL) |
| 150 | return strlen(buf); |
| 151 | } |
| 152 | else if (sizeof_buf == 1) { |
| 153 | char b[2]; |
| 154 | if (fgets(b, sizeof(b), stdin) != NULL) { |
| 155 | memcpy(buf, b, strlen(b)); |
| 156 | return strlen(b); |
| 157 | } |
| 158 | } |
| 159 | else if (sizeof_buf == 0) |
| 160 | return 0; |
| 161 | return sim_io_eof; |
| 162 | break; |
| 163 | case DONT_USE_STDIO: |
| 164 | #if defined(O_NDELAY) && defined(F_GETFL) && defined(F_SETFL) |
| 165 | { |
| 166 | /* check for input */ |
| 167 | int flags; |
| 168 | int status; |
| 169 | int nr_read; |
| 170 | int result; |
| 171 | /* get the old status */ |
| 172 | flags = fcntl(0, F_GETFL, 0); |
| 173 | if (flags == -1) { |
| 174 | perror("sim_io_read_stdin"); |
| 175 | return sim_io_eof; |
| 176 | } |
| 177 | /* temp, disable blocking IO */ |
| 178 | status = fcntl(0, F_SETFL, flags | O_NDELAY); |
| 179 | if (status == -1) { |
| 180 | perror("sim_io_read_stdin"); |
| 181 | return sim_io_eof; |
| 182 | } |
| 183 | /* try for input */ |
| 184 | nr_read = read(0, buf, sizeof_buf); |
| 185 | if (nr_read > 0 |
| 186 | || (nr_read == 0 && sizeof_buf == 0)) |
| 187 | result = nr_read; |
| 188 | else if (nr_read == 0) |
| 189 | result = sim_io_eof; |
| 190 | else { /* nr_read < 0 */ |
| 191 | if (errno == EAGAIN) |
| 192 | result = sim_io_not_ready; |
| 193 | else |
| 194 | result = sim_io_eof; |
| 195 | } |
| 196 | /* return to regular vewing */ |
| 197 | status = fcntl(0, F_SETFL, flags); |
| 198 | if (status == -1) { |
| 199 | perror("sim_io_read_stdin"); |
| 200 | return sim_io_eof; |
| 201 | } |
| 202 | return result; |
| 203 | } |
| 204 | break; |
| 205 | #endif |
| 206 | default: |
| 207 | error("sim_io_read_stdin: invalid switch\n"); |
| 208 | break; |
| 209 | } |
| 210 | return 0; |
| 211 | } |
| 212 | |
| 213 | void |
| 214 | sim_io_flush_stdoutput(void) |
| 215 | { |
| 216 | switch (CURRENT_STDIO) { |
| 217 | case DO_USE_STDIO: |
| 218 | fflush (stdout); |
| 219 | break; |
| 220 | case DONT_USE_STDIO: |
| 221 | break; |
| 222 | default: |
| 223 | error("sim_io_flush_stdoutput: invalid switch\n"); |
| 224 | break; |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | void |
| 229 | sim_io_error (SIM_DESC sd, const char *msg, ...) |
| 230 | { |
| 231 | va_list ap; |
| 232 | va_start(ap, msg); |
| 233 | vprintf(msg, ap); |
| 234 | printf("\n"); |
| 235 | va_end(ap); |
| 236 | |
| 237 | /* any final clean up */ |
| 238 | if (ppc_trace[trace_print_info] && simulation != NULL) |
| 239 | psim_print_info (simulation, ppc_trace[trace_print_info]); |
| 240 | |
| 241 | exit (1); |
| 242 | } |
| 243 | |
| 244 | |
| 245 | void * |
| 246 | zalloc(long size) |
| 247 | { |
| 248 | void *memory = malloc(size); |
| 249 | if (memory == NULL) |
| 250 | error("zalloc failed\n"); |
| 251 | memset(memory, 0, size); |
| 252 | return memory; |
| 253 | } |
| 254 | |
| 255 | /* When a CNTRL-C occures, queue an event to shut down the simulation */ |
| 256 | |
| 257 | static RETSIGTYPE |
| 258 | cntrl_c(int sig) |
| 259 | { |
| 260 | psim_stop (simulation); |
| 261 | } |
| 262 | |
| 263 | |
| 264 | int |
| 265 | main(int argc, char **argv) |
| 266 | { |
| 267 | const char *name_of_file; |
| 268 | char *arg_; |
| 269 | psim_status status; |
| 270 | device *root = psim_tree(); |
| 271 | |
| 272 | /* parse the arguments */ |
| 273 | argv = psim_options (root, argv + 1, SIM_OPEN_STANDALONE); |
| 274 | if (argv[0] == NULL) { |
| 275 | if (ppc_trace[trace_opts]) { |
| 276 | print_options (); |
| 277 | return 0; |
| 278 | } else { |
| 279 | psim_usage (0, 0, SIM_OPEN_STANDALONE); |
| 280 | } |
| 281 | } |
| 282 | name_of_file = argv[0]; |
| 283 | |
| 284 | if (ppc_trace[trace_opts]) |
| 285 | print_options (); |
| 286 | |
| 287 | /* create the simulator */ |
| 288 | simulation = psim_create(name_of_file, root); |
| 289 | |
| 290 | /* fudge the environment so that _=prog-name */ |
| 291 | arg_ = (char*)zalloc(strlen(argv[0]) + strlen("_=") + 1); |
| 292 | strcpy(arg_, "_="); |
| 293 | strcat(arg_, argv[0]); |
| 294 | putenv(arg_); |
| 295 | |
| 296 | /* initialize it */ |
| 297 | psim_init(simulation); |
| 298 | psim_stack(simulation, argv, environ); |
| 299 | |
| 300 | { |
| 301 | RETSIGTYPE (*prev) (); |
| 302 | prev = signal(SIGINT, cntrl_c); |
| 303 | psim_run(simulation); |
| 304 | signal(SIGINT, prev); |
| 305 | } |
| 306 | |
| 307 | /* any final clean up */ |
| 308 | if (ppc_trace[trace_print_info]) |
| 309 | psim_print_info (simulation, ppc_trace[trace_print_info]); |
| 310 | |
| 311 | /* why did we stop */ |
| 312 | status = psim_get_status(simulation); |
| 313 | switch (status.reason) { |
| 314 | case was_continuing: |
| 315 | error("psim: continuing while stopped!\n"); |
| 316 | return 0; |
| 317 | case was_trap: |
| 318 | error("psim: no trap insn\n"); |
| 319 | return 0; |
| 320 | case was_exited: |
| 321 | return status.signal; |
| 322 | case was_signalled: |
| 323 | printf ("%s: Caught signal %d at address 0x%lx\n", |
| 324 | name_of_file, (int)status.signal, |
| 325 | (long)status.program_counter); |
| 326 | return status.signal; |
| 327 | default: |
| 328 | error("unknown halt condition\n"); |
| 329 | return 0; |
| 330 | } |
| 331 | } |