void sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc) { sim_engine *engine = NULL; SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); engine = STATE_ENGINE (sd); *reason = engine->reason; switch (*reason) { case sim_exited : *sigrc = engine->sigrc; break; case sim_signalled : /* ??? See the comment below case `sim_signalled' in gdb/remote-sim.c:gdbsim_wait. ??? Consider the case of the target requesting that it kill(2) itself with SIGNAL. That SIGNAL, being target specific, will not correspond to either of the SIM_SIGNAL enum nor the HOST_SIGNAL. A mapping from TARGET_SIGNAL to HOST_SIGNAL is needed. */ *sigrc = sim_signal_to_host (sd, engine->sigrc); break; case sim_stopped : /* The gdb/simulator interface calls for us to return the host version of the signal which gdb then converts into the target's version. This is obviously a bit clumsy. */ *sigrc = sim_signal_to_host (sd, engine->sigrc); break; default : abort (); } }
void sim_engine_halt (SIM_DESC sd, sim_cpu *last_cpu, sim_cpu *next_cpu, /* NULL - use default */ sim_cia cia, enum sim_stop reason, int sigrc) { sim_engine *engine = STATE_ENGINE (sd); ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER); if (engine->jmpbuf != NULL) { jmp_buf *halt_buf = engine->jmpbuf; engine->last_cpu = last_cpu; engine->next_cpu = next_cpu; engine->reason = reason; engine->sigrc = sigrc; SIM_ENGINE_HALT_HOOK (sd, last_cpu, cia); #ifdef SIM_CPU_EXCEPTION_SUSPEND if (last_cpu != NULL && reason != sim_exited) SIM_CPU_EXCEPTION_SUSPEND (sd, last_cpu, sim_signal_to_host (sd, sigrc)); #endif longjmp (*halt_buf, sim_engine_halt_jmpval); } else { sim_io_error (sd, "sim_halt - bad long jump"); abort (); } }
int main (int argc, char **argv) { char *name; char **prog_argv = NULL; struct bfd *prog_bfd; enum sim_stop reason; int sigrc = 0; int single_step = 0; RETSIGTYPE (*prev_sigint) (); myname = argv[0] + strlen (argv[0]); while (myname > argv[0] && myname[-1] != '/') --myname; /* INTERNAL: When MYNAME is `step', single step the simulator instead of allowing it to run free. The sole purpose of this HACK is to allow the sim_resume interface's step argument to be tested without having to build/run gdb. */ if (strlen (myname) > 4 && strcmp (myname - 4, "step") == 0) { single_step = 1; } /* Create an instance of the simulator. */ default_callback.init (&default_callback); sd = sim_open (SIM_OPEN_STANDALONE, &default_callback, NULL, argv); if (sd == 0) exit (1); if (STATE_MAGIC (sd) != SIM_MAGIC_NUMBER) { fprintf (stderr, "Internal error - bad magic number in simulator struct\n"); abort (); } /* We can't set the endianness in the callback structure until sim_config is called, which happens in sim_open. */ default_callback.target_endian = (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE); /* Was there a program to run? */ prog_argv = STATE_PROG_ARGV (sd); prog_bfd = STATE_PROG_BFD (sd); if (prog_argv == NULL || *prog_argv == NULL) usage (); name = *prog_argv; /* For simulators that don't open prog during sim_open() */ if (prog_bfd == NULL) { prog_bfd = bfd_openr (name, 0); if (prog_bfd == NULL) { fprintf (stderr, "%s: can't open \"%s\": %s\n", myname, name, bfd_errmsg (bfd_get_error ())); exit (1); } if (!bfd_check_format (prog_bfd, bfd_object)) { fprintf (stderr, "%s: \"%s\" is not an object file: %s\n", myname, name, bfd_errmsg (bfd_get_error ())); exit (1); } } if (STATE_VERBOSE_P (sd)) printf ("%s %s\n", myname, name); /* Load the program into the simulator. */ if (sim_load (sd, name, prog_bfd, 0) == SIM_RC_FAIL) exit (1); /* Prepare the program for execution. */ #ifdef HAVE_ENVIRON sim_create_inferior (sd, prog_bfd, prog_argv, environ); #else sim_create_inferior (sd, prog_bfd, prog_argv, NULL); #endif /* To accommodate relative file paths, chdir to sysroot now. We mustn't do this until BFD has opened the program, else we wouldn't find the executable if it has a relative file path. */ if (simulator_sysroot[0] != '\0' && chdir (simulator_sysroot) < 0) { fprintf (stderr, "%s: can't change directory to \"%s\"\n", myname, simulator_sysroot); exit (1); } /* Run/Step the program. */ if (single_step) { do { prev_sigint = signal (SIGINT, cntrl_c); sim_resume (sd, 1/*step*/, 0); signal (SIGINT, prev_sigint); sim_stop_reason (sd, &reason, &sigrc); if ((reason == sim_stopped) && (sigrc == sim_signal_to_host (sd, SIM_SIGINT))) break; /* exit on control-C */ } /* remain on breakpoint or signals in oe mode*/ while (((reason == sim_signalled) && (sigrc == sim_signal_to_host (sd, SIM_SIGTRAP))) || ((reason == sim_stopped) && (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT))); } else { do { #if defined (HAVE_SIGACTION) && defined (SA_RESTART) struct sigaction sa, osa; sa.sa_handler = cntrl_c; sigemptyset (&sa.sa_mask); sa.sa_flags = 0; sigaction (SIGINT, &sa, &osa); prev_sigint = osa.sa_handler; #else prev_sigint = signal (SIGINT, cntrl_c); #endif sim_resume (sd, 0, sigrc); signal (SIGINT, prev_sigint); sim_stop_reason (sd, &reason, &sigrc); if ((reason == sim_stopped) && (sigrc == sim_signal_to_host (sd, SIM_SIGINT))) break; /* exit on control-C */ /* remain on signals in oe mode */ } while ((reason == sim_stopped) && (STATE_ENVIRONMENT (sd) == OPERATING_ENVIRONMENT)); } /* Print any stats the simulator collected. */ if (STATE_VERBOSE_P (sd)) sim_info (sd, 0); /* Shutdown the simulator. */ sim_close (sd, 0); /* If reason is sim_exited, then sigrc holds the exit code which we want to return. If reason is sim_stopped or sim_signalled, then sigrc holds the signal that the simulator received; we want to return that to indicate failure. */ /* Why did we stop? */ switch (reason) { case sim_signalled: case sim_stopped: if (sigrc != 0) fprintf (stderr, "program stopped with signal %d.\n", sigrc); break; case sim_exited: break; default: fprintf (stderr, "program in undefined state (%d:%d)\n", reason, sigrc); break; } return sigrc; }