1 /* New version of run front end support for simulators. 2 Copyright (C) 1997-2016 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 "config.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 const 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 const 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 = lbasename (argv[0]); 76 77 /* INTERNAL: When MYNAME is `step', single step the simulator 78 instead of allowing it to run free. The sole purpose of this 79 HACK is to allow the sim_resume interface's step argument to be 80 tested without having to build/run gdb. */ 81 if (strlen (myname) > 4 && strcmp (myname - 4, "step") == 0) 82 { 83 single_step = 1; 84 } 85 86 /* Create an instance of the simulator. */ 87 default_callback.init (&default_callback); 88 sd = sim_open (SIM_OPEN_STANDALONE, &default_callback, NULL, argv); 89 if (sd == 0) 90 exit (1); 91 if (STATE_MAGIC (sd) != SIM_MAGIC_NUMBER) 92 { 93 fprintf (stderr, "Internal error - bad magic number in simulator struct\n"); 94 abort (); 95 } 96 97 /* We can't set the endianness in the callback structure until 98 sim_config is called, which happens in sim_open. */ 99 default_callback.target_endian 100 = (CURRENT_TARGET_BYTE_ORDER == BFD_ENDIAN_BIG 101 ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); 102 103 /* Was there a program to run? */ 104 prog_argv = STATE_PROG_ARGV (sd); 105 prog_bfd = STATE_PROG_BFD (sd); 106 if (prog_argv == NULL || *prog_argv == NULL) 107 usage (); 108 109 name = *prog_argv; 110 111 /* For simulators that don't open prog during sim_open() */ 112 if (prog_bfd == NULL) 113 { 114 prog_bfd = bfd_openr (name, 0); 115 if (prog_bfd == NULL) 116 { 117 fprintf (stderr, "%s: can't open \"%s\": %s\n", 118 myname, name, bfd_errmsg (bfd_get_error ())); 119 exit (1); 120 } 121 if (!bfd_check_format (prog_bfd, bfd_object)) 122 { 123 fprintf (stderr, "%s: \"%s\" is not an object file: %s\n", 124 myname, name, bfd_errmsg (bfd_get_error ())); 125 exit (1); 126 } 127 } 128 129 if (STATE_VERBOSE_P (sd)) 130 printf ("%s %s\n", myname, name); 131 132 /* Load the program into the simulator. */ 133 if (sim_load (sd, name, prog_bfd, 0) == SIM_RC_FAIL) 134 exit (1); 135 136 /* Prepare the program for execution. */ 137 #ifdef HAVE_ENVIRON 138 sim_create_inferior (sd, prog_bfd, prog_argv, environ); 139 #else 140 sim_create_inferior (sd, prog_bfd, prog_argv, NULL); 141 #endif 142 143 /* To accommodate relative file paths, chdir to sysroot now. We 144 mustn't do this until BFD has opened the program, else we wouldn't 145 find the executable if it has a relative file path. */ 146 if (simulator_sysroot[0] != '\0' && chdir (simulator_sysroot) < 0) 147 { 148 fprintf (stderr, "%s: can't change directory to \"%s\"\n", 149 myname, simulator_sysroot); 150 exit (1); 151 } 152 153 /* Run/Step the program. */ 154 if (single_step) 155 { 156 do 157 { 158 prev_sigint = signal (SIGINT, cntrl_c); 159 sim_resume (sd, 1/*step*/, 0); 160 signal (SIGINT, prev_sigint); 161 sim_stop_reason (sd, &reason, &sigrc); 162 163 if ((reason == sim_stopped) && 164 (sigrc == sim_signal_to_host (sd, SIM_SIGINT))) 165 break; /* exit on control-C */ 166 } 167 /* remain on breakpoint or signals in oe mode*/ 168 while (((reason == sim_signalled) && 169 (sigrc == sim_signal_to_host (sd, SIM_SIGTRAP))) || 170 ((reason == sim_stopped) && 171 (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT))); 172 } 173 else 174 { 175 do 176 { 177 #if defined (HAVE_SIGACTION) && defined (SA_RESTART) 178 struct sigaction sa, osa; 179 sa.sa_handler = cntrl_c; 180 sigemptyset (&sa.sa_mask); 181 sa.sa_flags = 0; 182 sigaction (SIGINT, &sa, &osa); 183 prev_sigint = osa.sa_handler; 184 #else 185 prev_sigint = signal (SIGINT, cntrl_c); 186 #endif 187 sim_resume (sd, 0, sigrc); 188 signal (SIGINT, prev_sigint); 189 sim_stop_reason (sd, &reason, &sigrc); 190 191 if ((reason == sim_stopped) && 192 (sigrc == sim_signal_to_host (sd, SIM_SIGINT))) 193 break; /* exit on control-C */ 194 195 /* remain on signals in oe mode */ 196 } while ((reason == sim_stopped) && 197 (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT)); 198 199 } 200 /* Print any stats the simulator collected. */ 201 if (STATE_VERBOSE_P (sd)) 202 sim_info (sd, 0); 203 204 /* Shutdown the simulator. */ 205 sim_close (sd, 0); 206 207 /* If reason is sim_exited, then sigrc holds the exit code which we want 208 to return. If reason is sim_stopped or sim_signalled, then sigrc holds 209 the signal that the simulator received; we want to return that to 210 indicate failure. */ 211 212 /* Why did we stop? */ 213 switch (reason) 214 { 215 case sim_signalled: 216 case sim_stopped: 217 if (sigrc != 0) 218 fprintf (stderr, "program stopped with signal %d (%s).\n", sigrc, 219 strsignal (sigrc)); 220 break; 221 222 case sim_exited: 223 break; 224 225 default: 226 fprintf (stderr, "program in undefined state (%d:%d)\n", reason, sigrc); 227 break; 228 229 } 230 231 return sigrc; 232 } 233 234 static void 235 usage (void) 236 { 237 fprintf (stderr, "Usage: %s [options] program [program args]\n", myname); 238 fprintf (stderr, "Run `%s --help' for full list of options.\n", myname); 239 exit (1); 240 } 241