1 /* New version of run front end support for simulators. 2 Copyright (C) 1997-2015 Free Software Foundation, Inc. 3 4 This program is free software; you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 16 17 /* Need to be before general includes, to pick up e.g. _GNU_SOURCE. */ 18 #ifdef HAVE_CONFIG_H 19 #include "cconfig.h" 20 #include "tconfig.h" 21 #endif 22 23 #include <signal.h> 24 25 /* For strsignal. */ 26 #ifdef HAVE_STRING_H 27 #include <string.h> 28 #else 29 #ifdef HAVE_STRINGS_H 30 #include <strings.h> 31 #endif 32 #endif 33 34 #include "sim-main.h" 35 36 #include "bfd.h" 37 38 #ifdef HAVE_ENVIRON 39 extern char **environ; 40 #endif 41 42 #ifdef HAVE_UNISTD_H 43 /* For chdir. */ 44 #include <unistd.h> 45 #endif 46 47 static void usage (void); 48 49 extern host_callback default_callback; 50 51 static char *myname; 52 53 static SIM_DESC sd; 54 55 static RETSIGTYPE 56 cntrl_c (int sig) 57 { 58 if (! sim_stop (sd)) 59 { 60 fprintf (stderr, "Quit!\n"); 61 exit (1); 62 } 63 } 64 65 int 66 main (int argc, char **argv) 67 { 68 char *name; 69 char **prog_argv = NULL; 70 struct bfd *prog_bfd; 71 enum sim_stop reason; 72 int sigrc = 0; 73 int single_step = 0; 74 RETSIGTYPE (*prev_sigint) (); 75 76 myname = argv[0] + strlen (argv[0]); 77 while (myname > argv[0] && myname[-1] != '/') 78 --myname; 79 80 /* INTERNAL: When MYNAME is `step', single step the simulator 81 instead of allowing it to run free. The sole purpose of this 82 HACK is to allow the sim_resume interface's step argument to be 83 tested without having to build/run gdb. */ 84 if (strlen (myname) > 4 && strcmp (myname - 4, "step") == 0) 85 { 86 single_step = 1; 87 } 88 89 /* Create an instance of the simulator. */ 90 default_callback.init (&default_callback); 91 sd = sim_open (SIM_OPEN_STANDALONE, &default_callback, NULL, argv); 92 if (sd == 0) 93 exit (1); 94 if (STATE_MAGIC (sd) != SIM_MAGIC_NUMBER) 95 { 96 fprintf (stderr, "Internal error - bad magic number in simulator struct\n"); 97 abort (); 98 } 99 100 /* We can't set the endianness in the callback structure until 101 sim_config is called, which happens in sim_open. */ 102 default_callback.target_endian 103 = (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN 104 ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); 105 106 /* Was there a program to run? */ 107 prog_argv = STATE_PROG_ARGV (sd); 108 prog_bfd = STATE_PROG_BFD (sd); 109 if (prog_argv == NULL || *prog_argv == NULL) 110 usage (); 111 112 name = *prog_argv; 113 114 /* For simulators that don't open prog during sim_open() */ 115 if (prog_bfd == NULL) 116 { 117 prog_bfd = bfd_openr (name, 0); 118 if (prog_bfd == NULL) 119 { 120 fprintf (stderr, "%s: can't open \"%s\": %s\n", 121 myname, name, bfd_errmsg (bfd_get_error ())); 122 exit (1); 123 } 124 if (!bfd_check_format (prog_bfd, bfd_object)) 125 { 126 fprintf (stderr, "%s: \"%s\" is not an object file: %s\n", 127 myname, name, bfd_errmsg (bfd_get_error ())); 128 exit (1); 129 } 130 } 131 132 if (STATE_VERBOSE_P (sd)) 133 printf ("%s %s\n", myname, name); 134 135 /* Load the program into the simulator. */ 136 if (sim_load (sd, name, prog_bfd, 0) == SIM_RC_FAIL) 137 exit (1); 138 139 /* Prepare the program for execution. */ 140 #ifdef HAVE_ENVIRON 141 sim_create_inferior (sd, prog_bfd, prog_argv, environ); 142 #else 143 sim_create_inferior (sd, prog_bfd, prog_argv, NULL); 144 #endif 145 146 /* To accommodate relative file paths, chdir to sysroot now. We 147 mustn't do this until BFD has opened the program, else we wouldn't 148 find the executable if it has a relative file path. */ 149 if (simulator_sysroot[0] != '\0' && chdir (simulator_sysroot) < 0) 150 { 151 fprintf (stderr, "%s: can't change directory to \"%s\"\n", 152 myname, simulator_sysroot); 153 exit (1); 154 } 155 156 /* Run/Step the program. */ 157 if (single_step) 158 { 159 do 160 { 161 prev_sigint = signal (SIGINT, cntrl_c); 162 sim_resume (sd, 1/*step*/, 0); 163 signal (SIGINT, prev_sigint); 164 sim_stop_reason (sd, &reason, &sigrc); 165 166 if ((reason == sim_stopped) && 167 (sigrc == sim_signal_to_host (sd, SIM_SIGINT))) 168 break; /* exit on control-C */ 169 } 170 /* remain on breakpoint or signals in oe mode*/ 171 while (((reason == sim_signalled) && 172 (sigrc == sim_signal_to_host (sd, SIM_SIGTRAP))) || 173 ((reason == sim_stopped) && 174 (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT))); 175 } 176 else 177 { 178 do 179 { 180 #if defined (HAVE_SIGACTION) && defined (SA_RESTART) 181 struct sigaction sa, osa; 182 sa.sa_handler = cntrl_c; 183 sigemptyset (&sa.sa_mask); 184 sa.sa_flags = 0; 185 sigaction (SIGINT, &sa, &osa); 186 prev_sigint = osa.sa_handler; 187 #else 188 prev_sigint = signal (SIGINT, cntrl_c); 189 #endif 190 sim_resume (sd, 0, sigrc); 191 signal (SIGINT, prev_sigint); 192 sim_stop_reason (sd, &reason, &sigrc); 193 194 if ((reason == sim_stopped) && 195 (sigrc == sim_signal_to_host (sd, SIM_SIGINT))) 196 break; /* exit on control-C */ 197 198 /* remain on signals in oe mode */ 199 } while ((reason == sim_stopped) && 200 (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT)); 201 202 } 203 /* Print any stats the simulator collected. */ 204 if (STATE_VERBOSE_P (sd)) 205 sim_info (sd, 0); 206 207 /* Shutdown the simulator. */ 208 sim_close (sd, 0); 209 210 /* If reason is sim_exited, then sigrc holds the exit code which we want 211 to return. If reason is sim_stopped or sim_signalled, then sigrc holds 212 the signal that the simulator received; we want to return that to 213 indicate failure. */ 214 215 /* Why did we stop? */ 216 switch (reason) 217 { 218 case sim_signalled: 219 case sim_stopped: 220 if (sigrc != 0) 221 fprintf (stderr, "program stopped with signal %d (%s).\n", sigrc, 222 strsignal (sigrc)); 223 break; 224 225 case sim_exited: 226 break; 227 228 default: 229 fprintf (stderr, "program in undefined state (%d:%d)\n", reason, sigrc); 230 break; 231 232 } 233 234 return sigrc; 235 } 236 237 static void 238 usage (void) 239 { 240 fprintf (stderr, "Usage: %s [options] program [program args]\n", myname); 241 fprintf (stderr, "Run `%s --help' for full list of options.\n", myname); 242 exit (1); 243 } 244