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