1 /* New version of run front end support for simulators. 2 Copyright (C) 1997-2020 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 #include <stdlib.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 const 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 const 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 = lbasename (argv[0]); 77 78 /* INTERNAL: When MYNAME is `step', single step the simulator 79 instead of allowing it to run free. The sole purpose of this 80 HACK is to allow the sim_resume interface's step argument to be 81 tested without having to build/run gdb. */ 82 if (strlen (myname) > 4 && strcmp (myname - 4, "step") == 0) 83 { 84 single_step = 1; 85 } 86 87 /* Create an instance of the simulator. */ 88 default_callback.init (&default_callback); 89 sd = sim_open (SIM_OPEN_STANDALONE, &default_callback, NULL, argv); 90 if (sd == 0) 91 exit (1); 92 if (STATE_MAGIC (sd) != SIM_MAGIC_NUMBER) 93 { 94 fprintf (stderr, "Internal error - bad magic number in simulator struct\n"); 95 abort (); 96 } 97 98 /* We can't set the endianness in the callback structure until 99 sim_config is called, which happens in sim_open. */ 100 default_callback.target_endian 101 = (CURRENT_TARGET_BYTE_ORDER == BFD_ENDIAN_BIG 102 ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); 103 104 /* Was there a program to run? */ 105 prog_argv = STATE_PROG_ARGV (sd); 106 prog_bfd = STATE_PROG_BFD (sd); 107 if (prog_argv == NULL || *prog_argv == NULL) 108 usage (); 109 110 name = *prog_argv; 111 112 /* For simulators that don't open prog during sim_open() */ 113 if (prog_bfd == NULL) 114 { 115 prog_bfd = bfd_openr (name, 0); 116 if (prog_bfd == NULL) 117 { 118 fprintf (stderr, "%s: can't open \"%s\": %s\n", 119 myname, name, bfd_errmsg (bfd_get_error ())); 120 exit (1); 121 } 122 if (!bfd_check_format (prog_bfd, bfd_object)) 123 { 124 fprintf (stderr, "%s: \"%s\" is not an object file: %s\n", 125 myname, name, bfd_errmsg (bfd_get_error ())); 126 exit (1); 127 } 128 } 129 130 if (STATE_VERBOSE_P (sd)) 131 printf ("%s %s\n", myname, name); 132 133 /* Load the program into the simulator. */ 134 if (sim_load (sd, name, prog_bfd, 0) == SIM_RC_FAIL) 135 exit (1); 136 137 /* Prepare the program for execution. */ 138 #ifdef HAVE_ENVIRON 139 sim_create_inferior (sd, prog_bfd, prog_argv, environ); 140 #else 141 sim_create_inferior (sd, prog_bfd, prog_argv, NULL); 142 #endif 143 144 /* To accommodate relative file paths, chdir to sysroot now. We 145 mustn't do this until BFD has opened the program, else we wouldn't 146 find the executable if it has a relative file path. */ 147 if (simulator_sysroot[0] != '\0' && chdir (simulator_sysroot) < 0) 148 { 149 fprintf (stderr, "%s: can't change directory to \"%s\"\n", 150 myname, simulator_sysroot); 151 exit (1); 152 } 153 154 /* Run/Step the program. */ 155 if (single_step) 156 { 157 do 158 { 159 prev_sigint = signal (SIGINT, cntrl_c); 160 sim_resume (sd, 1/*step*/, 0); 161 signal (SIGINT, prev_sigint); 162 sim_stop_reason (sd, &reason, &sigrc); 163 164 if ((reason == sim_stopped) && 165 (sigrc == sim_signal_to_host (sd, SIM_SIGINT))) 166 break; /* exit on control-C */ 167 } 168 /* remain on breakpoint or signals in oe mode*/ 169 while (((reason == sim_signalled) && 170 (sigrc == sim_signal_to_host (sd, SIM_SIGTRAP))) || 171 ((reason == sim_stopped) && 172 (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT))); 173 } 174 else 175 { 176 do 177 { 178 #if defined (HAVE_SIGACTION) && defined (SA_RESTART) 179 struct sigaction sa, osa; 180 sa.sa_handler = cntrl_c; 181 sigemptyset (&sa.sa_mask); 182 sa.sa_flags = 0; 183 sigaction (SIGINT, &sa, &osa); 184 prev_sigint = osa.sa_handler; 185 #else 186 prev_sigint = signal (SIGINT, cntrl_c); 187 #endif 188 sim_resume (sd, 0, sigrc); 189 signal (SIGINT, prev_sigint); 190 sim_stop_reason (sd, &reason, &sigrc); 191 192 if ((reason == sim_stopped) && 193 (sigrc == sim_signal_to_host (sd, SIM_SIGINT))) 194 break; /* exit on control-C */ 195 196 /* remain on signals in oe mode */ 197 } while ((reason == sim_stopped) && 198 (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT)); 199 200 } 201 /* Print any stats the simulator collected. */ 202 if (STATE_VERBOSE_P (sd)) 203 sim_info (sd, 0); 204 205 /* Shutdown the simulator. */ 206 sim_close (sd, 0); 207 208 /* If reason is sim_exited, then sigrc holds the exit code which we want 209 to return. If reason is sim_stopped or sim_signalled, then sigrc holds 210 the signal that the simulator received; we want to return that to 211 indicate failure. */ 212 213 /* Why did we stop? */ 214 switch (reason) 215 { 216 case sim_signalled: 217 case sim_stopped: 218 if (sigrc != 0) 219 fprintf (stderr, "program stopped with signal %d (%s).\n", sigrc, 220 strsignal (sigrc)); 221 break; 222 223 case sim_exited: 224 break; 225 226 default: 227 fprintf (stderr, "program in undefined state (%d:%d)\n", reason, sigrc); 228 break; 229 230 } 231 232 return sigrc; 233 } 234 235 static void 236 usage (void) 237 { 238 fprintf (stderr, "Usage: %s [options] program [program args]\n", myname); 239 fprintf (stderr, "Run `%s --help' for full list of options.\n", myname); 240 exit (1); 241 } 242