/* The common simulator framework for GDB, the GNU Debugger. Copyright 2002-2014 Free Software Foundation, Inc. Contributed by Andrew Cagney and Red Hat. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ #include "sim-main.h" #include "sim-io.h" #include "targ-vals.h" #include #if HAVE_FCNTL_H #include #endif #if HAVE_UNISTD_H #include #endif /* Define the rate at which the simulator should poll the host for a quit. */ #ifndef POLL_QUIT_INTERVAL #define POLL_QUIT_INTERVAL 0x10 #endif static int poll_quit_count = POLL_QUIT_INTERVAL; /* See the file include/callbacks.h for a description */ int sim_io_init (SIM_DESC sd) { return STATE_CALLBACK (sd)->init (STATE_CALLBACK (sd)); } int sim_io_shutdown (SIM_DESC sd) { return STATE_CALLBACK (sd)->shutdown (STATE_CALLBACK (sd)); } int sim_io_unlink (SIM_DESC sd, const char *f1) { return STATE_CALLBACK (sd)->unlink (STATE_CALLBACK (sd), f1); } long sim_io_time (SIM_DESC sd, long *t) { return STATE_CALLBACK (sd)->time (STATE_CALLBACK (sd), t); } int sim_io_system (SIM_DESC sd, const char *s) { return STATE_CALLBACK (sd)->system (STATE_CALLBACK (sd), s); } int sim_io_rename (SIM_DESC sd, const char *f1, const char *f2) { return STATE_CALLBACK (sd)->rename (STATE_CALLBACK (sd), f1, f2); } int sim_io_write_stdout (SIM_DESC sd, const char *buf, int len) { switch (CURRENT_STDIO) { case DO_USE_STDIO: return STATE_CALLBACK (sd)->write_stdout (STATE_CALLBACK (sd), buf, len); break; case DONT_USE_STDIO: return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), 1, buf, len); break; default: sim_io_error (sd, "sim_io_write_stdout: unaccounted switch\n"); break; } return 0; } void sim_io_flush_stdout (SIM_DESC sd) { switch (CURRENT_STDIO) { case DO_USE_STDIO: STATE_CALLBACK (sd)->flush_stdout (STATE_CALLBACK (sd)); break; case DONT_USE_STDIO: break; default: sim_io_error (sd, "sim_io_flush_stdout: unaccounted switch\n"); break; } } int sim_io_write_stderr (SIM_DESC sd, const char *buf, int len) { switch (CURRENT_STDIO) { case DO_USE_STDIO: return STATE_CALLBACK (sd)->write_stderr (STATE_CALLBACK (sd), buf, len); break; case DONT_USE_STDIO: return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), 2, buf, len); break; default: sim_io_error (sd, "sim_io_write_stderr: unaccounted switch\n"); break; } return 0; } void sim_io_flush_stderr (SIM_DESC sd) { switch (CURRENT_STDIO) { case DO_USE_STDIO: STATE_CALLBACK (sd)->flush_stderr (STATE_CALLBACK (sd)); break; case DONT_USE_STDIO: break; default: sim_io_error (sd, "sim_io_flush_stderr: unaccounted switch\n"); break; } } int sim_io_write (SIM_DESC sd, int fd, const char *buf, int len) { return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), fd, buf, len); } int sim_io_read_stdin (SIM_DESC sd, char *buf, int len) { switch (CURRENT_STDIO) { case DO_USE_STDIO: return STATE_CALLBACK (sd)->read_stdin (STATE_CALLBACK (sd), buf, len); break; case DONT_USE_STDIO: return STATE_CALLBACK (sd)->read (STATE_CALLBACK (sd), 0, buf, len); break; default: sim_io_error (sd, "sim_io_read_stdin: unaccounted switch\n"); break; } return 0; } int sim_io_read (SIM_DESC sd, int fd, char *buf, int len) { return STATE_CALLBACK (sd)->read (STATE_CALLBACK (sd), fd, buf, len); } int sim_io_open (SIM_DESC sd, const char *name, int flags) { return STATE_CALLBACK (sd)->open (STATE_CALLBACK (sd), name, flags); } int sim_io_lseek (SIM_DESC sd, int fd, long off, int way) { return STATE_CALLBACK (sd)->lseek (STATE_CALLBACK (sd), fd, off, way); } int sim_io_isatty (SIM_DESC sd, int fd) { return STATE_CALLBACK (sd)->isatty (STATE_CALLBACK (sd), fd); } int sim_io_get_errno (SIM_DESC sd) { return STATE_CALLBACK (sd)->get_errno (STATE_CALLBACK (sd)); } int sim_io_close (SIM_DESC sd, int fd) { return STATE_CALLBACK (sd)->close (STATE_CALLBACK (sd), fd); } void sim_io_printf (SIM_DESC sd, const char *fmt, ...) { va_list ap; va_start (ap, fmt); STATE_CALLBACK (sd)->vprintf_filtered (STATE_CALLBACK (sd), fmt, ap); va_end (ap); } void sim_io_vprintf (SIM_DESC sd, const char *fmt, va_list ap) { STATE_CALLBACK (sd)->vprintf_filtered (STATE_CALLBACK (sd), fmt, ap); } void sim_io_eprintf (SIM_DESC sd, const char *fmt, ...) { va_list ap; va_start (ap, fmt); STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap); va_end (ap); } void sim_io_evprintf (SIM_DESC sd, const char *fmt, va_list ap) { STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap); } void sim_io_error (SIM_DESC sd, const char *fmt, ...) { if (sd == NULL || STATE_CALLBACK (sd) == NULL) { va_list ap; va_start (ap, fmt); vfprintf (stderr, fmt, ap); va_end (ap); fprintf (stderr, "\n"); abort (); } else { va_list ap; va_start (ap, fmt); STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap); va_end (ap); STATE_CALLBACK (sd)->error (STATE_CALLBACK (sd), ""); } } void sim_io_poll_quit (SIM_DESC sd) { if (STATE_CALLBACK (sd)->poll_quit != NULL && poll_quit_count-- < 0) { poll_quit_count = POLL_QUIT_INTERVAL; if (STATE_CALLBACK (sd)->poll_quit (STATE_CALLBACK (sd))) sim_stop (sd); } } /* Based on gdb-4.17/sim/ppc/main.c:sim_io_read_stdin(). FIXME: Should not be calling fcntl() or grubbing around inside of ->fdmap and ->errno. FIXME: Some completly new mechanism for handling the general problem of asynchronous IO is needed. FIXME: This function does not supress the echoing (ECHO) of input. Consequently polled input is always displayed. FIXME: This function does not perform uncooked reads. Consequently, data will not be read until an EOLN character has been entered. A cntrl-d may force the early termination of a line */ int sim_io_poll_read (SIM_DESC sd, int sim_io_fd, char *buf, int sizeof_buf) { #if defined(O_NDELAY) && defined(F_GETFL) && defined(F_SETFL) int fd = STATE_CALLBACK (sd)->fdmap[sim_io_fd]; int flags; int status; int nr_read; int result; STATE_CALLBACK (sd)->last_errno = 0; /* get the old status */ flags = fcntl (fd, F_GETFL, 0); if (flags == -1) { perror ("sim_io_poll_read"); return 0; } /* temp, disable blocking IO */ status = fcntl (fd, F_SETFL, flags | O_NDELAY); if (status == -1) { perror ("sim_io_read_stdin"); return 0; } /* try for input */ nr_read = read (fd, buf, sizeof_buf); if (nr_read >= 0) { /* printf ("\n", nr_read); */ result = nr_read; } else { /* nr_read < 0 */ result = -1; STATE_CALLBACK (sd)->last_errno = errno; } /* return to regular vewing */ status = fcntl (fd, F_SETFL, flags); if (status == -1) { perror ("sim_io_read_stdin"); /* return 0; */ } return result; #else return sim_io_read (sd, sim_io_fd, buf, sizeof_buf); #endif } int sim_io_stat (SIM_DESC sd, const char *path, struct stat *buf) { return STATE_CALLBACK (sd)->to_stat (STATE_CALLBACK (sd), path, buf); } int sim_io_fstat (SIM_DESC sd, int fd, struct stat *buf) { return STATE_CALLBACK (sd)->to_fstat (STATE_CALLBACK (sd), fd, buf); }