Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 379 insertions, 0 deletions

diff --git a/sim/common/sim-io.c b/sim/common/sim-io.c
new file mode 100644
index 0000000..f3d2f67
--- /dev/null
+++ b/sim/common/sim-io.c
@@ -0,0 +1,379 @@
+/*  This file is part of the program psim.
+
+    Copyright (C) 1994-1997, Andrew Cagney <cagney@highland.com.au>
+    Copyright (C) 1998, Cygnus Solutions.
+
+    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 2 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, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ 
+    */
+
+
+#include "sim-main.h"
+#include "sim-io.h"
+#include "targ-vals.h"
+
+#include <errno.h>
+#if HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+
+/* 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)
+    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 ("<nr-read=%d>\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
+}