/* Generic serial interface routines
- Copyright 1992, 1993 Free Software Foundation, Inc.
+ Copyright 1992, 1993, 1996 Free Software Foundation, Inc.
This file is part of GDB.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
+#include <ctype.h>
#include "serial.h"
+#include "gdb_string.h"
+#include "gdbcmd.h"
-/* Open up a device or a network socket, depending upon the syntax of NAME. */
+/*#define DEBUGIFY*/
+#include "debugify.h"
+
+
+/* Linked list of serial I/O handlers */
static struct serial_ops *serial_ops_list = NULL;
+/* This is the last serial stream opened. Used by connect command. */
+
+static serial_t last_serial_opened = NULL;
+
+/* Pointer to list of scb's. */
+
+static serial_t scb_base;
+
+/* Non-NULL gives filename which contains a recording of the remote session,
+ suitable for playback by gdbserver. */
+
+static char *serial_logfile = NULL;
+static FILE *serial_logfp = NULL;
+
+static struct serial_ops *serial_interface_lookup PARAMS ((char *));
+static void serial_logchar PARAMS ((int ch, int timeout));
+static char logbase_hex[] = "hex";
+static char logbase_octal[] = "octal";
+static char logbase_ascii[] = "ascii";
+static char *logbase_enums[] = {logbase_hex, logbase_octal, logbase_ascii, NULL};
+static char *serial_logbase = logbase_ascii;
+
+\f
+static int serial_reading = 0;
+static int serial_writing = 0;
+
+void
+serial_log_command (cmd)
+ const char *cmd;
+{
+ if (!serial_logfp)
+ return;
+
+ if (serial_reading || serial_writing)
+ {
+ fputc_unfiltered ('\n', serial_logfp);
+ serial_reading = 0;
+ serial_writing = 0;
+ }
+ fprintf_unfiltered (serial_logfp, "c %s\n", cmd);
+ /* Make sure that the log file is as up-to-date as possible,
+ in case we are getting ready to dump core or something. */
+ fflush (serial_logfp);
+}
+
+/* Define bogus char to represent a BREAK. Should be careful to choose a value
+ that can't be confused with a normal char, or an error code. */
+#define SERIAL_BREAK 1235
+
+static void
+serial_logchar (ch, timeout)
+ int ch;
+ int timeout;
+{
+ if (serial_logbase != logbase_ascii)
+ fputc_unfiltered (' ', serial_logfp);
+
+ switch (ch)
+ {
+ case SERIAL_TIMEOUT:
+ fprintf_unfiltered (serial_logfp, "<Timeout: %d seconds>", timeout);
+ return;
+ case SERIAL_ERROR:
+ fprintf_unfiltered (serial_logfp, "<Error: %s>", safe_strerror (errno));
+ return;
+ case SERIAL_EOF:
+ fputs_unfiltered ("<Eof>", serial_logfp);
+ return;
+ case SERIAL_BREAK:
+ fputs_unfiltered ("<Break>", serial_logfp);
+ return;
+ default:
+ if (serial_logbase == logbase_hex)
+ fprintf_unfiltered (serial_logfp, "%02x", ch & 0xff);
+ else if (serial_logbase == logbase_octal)
+ fprintf_unfiltered (serial_logfp, "%03o", ch & 0xff);
+ else
+ switch (ch)
+ {
+ case '\\': fputs_unfiltered ("\\\\", serial_logfp); break;
+ case '\b': fputs_unfiltered ("\\b", serial_logfp); break;
+ case '\f': fputs_unfiltered ("\\f", serial_logfp); break;
+ case '\n': fputs_unfiltered ("\\n", serial_logfp); break;
+ case '\r': fputs_unfiltered ("\\r", serial_logfp); break;
+ case '\t': fputs_unfiltered ("\\t", serial_logfp); break;
+ case '\v': fputs_unfiltered ("\\v", serial_logfp); break;
+ default: fprintf_unfiltered (serial_logfp, isprint (ch) ? "%c" : "\\x%02x", ch & 0xFF); break;
+ }
+ }
+}
+
+int
+serial_write (scb, str, len)
+ serial_t scb;
+ const char *str;
+ int len;
+{
+ int count;
+
+ if (serial_logfp != NULL)
+ {
+ if (serial_reading)
+ {
+ fputc_unfiltered ('\n', serial_logfp);
+ serial_reading = 0;
+ }
+ if (!serial_writing)
+ {
+ fputs_unfiltered ("w ", serial_logfp);
+ serial_writing = 1;
+ }
+ for (count = 0; count < len; count++)
+ {
+ serial_logchar (str[count] & 0xff, 0);
+ }
+ /* Make sure that the log file is as up-to-date as possible,
+ in case we are getting ready to dump core or something. */
+ fflush (serial_logfp);
+ }
+ return (scb -> ops -> write (scb, str, len));
+}
+
+int
+serial_readchar (scb, timeout)
+ serial_t scb;
+ int timeout;
+{
+ int ch;
+
+ ch = scb -> ops -> readchar (scb, timeout);
+ if (serial_logfp != NULL)
+ {
+ if (serial_writing)
+ {
+ fputc_unfiltered ('\n', serial_logfp);
+ serial_writing = 0;
+ }
+ if (!serial_reading)
+ {
+ fputs_unfiltered ("r ", serial_logfp);
+ serial_reading = 1;
+ }
+ serial_logchar (ch, timeout);
+ /* Make sure that the log file is as up-to-date as possible,
+ in case we are getting ready to dump core or something. */
+ fflush (serial_logfp);
+ }
+ return (ch);
+}
+
+int
+serial_send_break (scb)
+ serial_t scb;
+{
+ if (serial_logfp != NULL)
+ {
+ if (serial_reading)
+ {
+ fputc_unfiltered ('\n', serial_logfp);
+ serial_reading = 0;
+ }
+ if (!serial_writing)
+ {
+ fputs_unfiltered ("w ", serial_logfp);
+ serial_writing = 1;
+ }
+ serial_logchar (SERIAL_BREAK, 0);
+ /* Make sure that the log file is as up-to-date as possible,
+ in case we are getting ready to dump core or something. */
+ fflush (serial_logfp);
+ }
+ return (scb -> ops -> send_break (scb));
+}
+
static struct serial_ops *
serial_interface_lookup (name)
char *name;
{
struct serial_ops *ops;
+ DBG(("serial_interface_lookup(%s)\n",name));
for (ops = serial_ops_list; ops; ops = ops->next)
if (strcmp (name, ops->name) == 0)
return ops;
+ DBG(("serial_interface_lookup: %s not found!\n",name));
return NULL;
}
serial_ops_list = optable;
}
+/* Open up a device or a network socket, depending upon the syntax of NAME. */
+
serial_t
-serial_open(name)
+serial_open (name)
const char *name;
{
serial_t scb;
struct serial_ops *ops;
- ops = serial_interface_lookup ("hardwire");
+ DBG(("serial_open\n"));
+ for (scb = scb_base; scb; scb = scb->next)
+ if (scb->name && strcmp (scb->name, name) == 0)
+ {
+ scb->refcnt++;
+ DBG(("serial_open: scb %s found\n", name));
+ return scb;
+ }
+
+ if (strcmp (name, "pc") == 0)
+ ops = serial_interface_lookup ("pc");
+ else if (strchr (name, ':'))
+ ops = serial_interface_lookup ("tcp");
+ else if (strncmp (name, "lpt", 3) == 0)
+ ops = serial_interface_lookup ("parallel");
+ else
+ ops = serial_interface_lookup ("hardwire");
if (!ops)
+ {
+ DBG(("serial_open: !ops; returning NULL\n"));
return NULL;
+ }
scb = (serial_t)xmalloc (sizeof (struct _serial_t));
if (scb->ops->open(scb, name))
{
free (scb);
+ DBG(("serial_open: scb->ops->open failed!\n"));
return NULL;
}
+ scb->name = strsave (name);
+ scb->next = scb_base;
+ scb->refcnt = 1;
+ scb_base = scb;
+
+ last_serial_opened = scb;
+
+ if (serial_logfile != NULL)
+ {
+ serial_logfp = fopen (serial_logfile, "w");
+ if (serial_logfp == NULL)
+ {
+ DBG(("serial_open: unable to open serial logfile %s!\n",serial_logfile));
+ perror_with_name (serial_logfile);
+ }
+ }
+
+ DBG(("serial_open: Done! :-)\n"));
+ return scb;
+}
+
+serial_t
+serial_fdopen (fd)
+ const int fd;
+{
+ serial_t scb;
+ struct serial_ops *ops;
+ DBG(("serial_fdopen\n"));
+
+ for (scb = scb_base; scb; scb = scb->next)
+ if (scb->fd == fd)
+ {
+ scb->refcnt++;
+ return scb;
+ }
+
+ ops = serial_interface_lookup ("hardwire");
+
+ if (!ops)
+ return NULL;
+
+ scb = (serial_t)xmalloc (sizeof (struct _serial_t));
+
+ scb->ops = ops;
+
+ scb->bufcnt = 0;
+ scb->bufp = scb->buf;
+
+ scb->fd = fd;
+
+ scb->name = NULL;
+ scb->next = scb_base;
+ scb->refcnt = 1;
+ scb_base = scb;
+
+ last_serial_opened = scb;
+
return scb;
}
void
-serial_close(scb)
+serial_close(scb, really_close)
serial_t scb;
+ int really_close;
{
- scb->ops->close(scb);
+ serial_t tmp_scb;
+
+ last_serial_opened = NULL;
+
+ if (serial_logfp)
+ {
+ if (serial_reading || serial_writing)
+ {
+ fputc_unfiltered ('\n', serial_logfp);
+ serial_reading = 0;
+ serial_writing = 0;
+ }
+ fclose (serial_logfp);
+ serial_logfp = NULL;
+ }
+
+/* This is bogus. It's not our fault if you pass us a bad scb...! Rob, you
+ should fix your code instead. */
+
+ if (!scb)
+ return;
+
+ scb->refcnt--;
+ if (scb->refcnt > 0)
+ return;
+
+ if (really_close)
+ scb->ops->close (scb);
+
+ if (scb->name)
+ free (scb->name);
+
+ if (scb_base == scb)
+ scb_base = scb_base->next;
+ else
+ for (tmp_scb = scb_base; tmp_scb; tmp_scb = tmp_scb->next)
+ {
+ if (tmp_scb->next != scb)
+ continue;
+
+ tmp_scb->next = tmp_scb->next->next;
+ break;
+ }
free(scb);
}
#if 0
+/*
+The connect command is #if 0 because I hadn't thought of an elegant
+way to wait for I/O on two serial_t's simultaneously. Two solutions
+came to mind:
+
+ 1) Fork, and have have one fork handle the to user direction,
+ and have the other hand the to target direction. This
+ obviously won't cut it for MSDOS.
+
+ 2) Use something like select. This assumes that stdin and
+ the target side can both be waited on via the same
+ mechanism. This may not be true for DOS, if GDB is
+ talking to the target via a TCP socket.
+-grossman, 8 Jun 93
+*/
+
/* Connect the user directly to the remote system. This command acts just like
the 'cu' or 'tip' command. Use <CR>~. or <CR>~^D to break out. */
+static serial_t tty_desc; /* Controlling terminal */
+
static void
cleanup_tty(ttystate)
- struct ttystate ttystate;
+ serial_ttystate ttystate;
{
- printf("\r\n[Exiting connect mode]\r\n");
- serial_restore(0, &ttystate);
+ printf_unfiltered ("\r\n[Exiting connect mode]\r\n");
+ SERIAL_SET_TTY_STATE (tty_desc, ttystate);
+ free (ttystate);
+ SERIAL_CLOSE (tty_desc);
}
static void
char *args;
int fromtty;
{
- fd_set readfds;
- int numfds;
int c;
char cur_esc = 0;
- static struct ttystate ttystate;
+ serial_ttystate ttystate;
+ serial_t port_desc; /* TTY port */
+ DBG(("connect_command\n"));
dont_repeat();
- if (desc < 0)
- error("target not open.");
-
if (args)
- fprintf("This command takes no args. They have been ignored.\n");
+ fprintf_unfiltered(gdb_stderr, "This command takes no args. They have been ignored.\n");
- printf("[Entering connect mode. Use ~. or ~^D to escape]\n");
+ printf_unfiltered("[Entering connect mode. Use ~. or ~^D to escape]\n");
- serial_raw(0, &ttystate);
+ tty_desc = SERIAL_FDOPEN (0);
+ port_desc = last_serial_opened;
- make_cleanup(cleanup_tty, &ttystate);
+ ttystate = SERIAL_GET_TTY_STATE (tty_desc);
- FD_ZERO(&readfds);
+ SERIAL_RAW (tty_desc);
+ SERIAL_RAW (port_desc);
+
+ make_cleanup (cleanup_tty, ttystate);
while (1)
{
- do
- {
- FD_SET(0, &readfds);
- FD_SET(desc, &readfds);
- numfds = select(sizeof(readfds)*8, &readfds, 0, 0, 0);
- }
- while (numfds == 0);
+ int mask;
- if (numfds < 0)
- perror_with_name("select");
+ mask = SERIAL_WAIT_2 (tty_desc, port_desc, -1);
- if (FD_ISSET(0, &readfds))
- { /* tty input, send to stdebug */
+ if (mask & 2)
+ { /* tty input */
char cx;
- c = serial_readchar(-1);
- if (c < 0)
- perror_with_name("connect");
-
- cx = c;
- serial_write(&cx, 1);
- switch (cur_esc)
+ while (1)
{
- case 0:
- if (c == '\r')
- cur_esc = c;
- break;
- case '\r':
- if (c == '~')
- cur_esc = c;
- else
- cur_esc = 0;
- break;
- case '~':
- if (c == '.' || c == '\004')
- return;
- else
- cur_esc = 0;
+ c = SERIAL_READCHAR(tty_desc, 0);
+
+ if (c == SERIAL_TIMEOUT)
+ break;
+
+ if (c < 0)
+ perror_with_name("connect");
+
+ cx = c;
+ SERIAL_WRITE(port_desc, &cx, 1);
+
+ switch (cur_esc)
+ {
+ case 0:
+ if (c == '\r')
+ cur_esc = c;
+ break;
+ case '\r':
+ if (c == '~')
+ cur_esc = c;
+ else
+ cur_esc = 0;
+ break;
+ case '~':
+ if (c == '.' || c == '\004')
+ return;
+ else
+ cur_esc = 0;
+ }
}
}
- if (FD_ISSET(desc, &readfds))
- {
+ if (mask & 1)
+ { /* Port input */
+ char cx;
+
while (1)
{
- c = serial_readchar(-1);
+ c = SERIAL_READCHAR(port_desc, 0);
+
+ if (c == SERIAL_TIMEOUT)
+ break;
+
if (c < 0)
- break;
- putchar(c);
+ perror_with_name("connect");
+
+ cx = c;
+
+ SERIAL_WRITE(tty_desc, &cx, 1);
}
- fflush(stdout);
}
}
}
+#endif /* 0 */
+
+/* VARARGS */
+void
+#ifdef ANSI_PROTOTYPES
+serial_printf (serial_t desc, const char *format, ...)
+#else
+serial_printf (va_alist)
+ va_dcl
+#endif
+{
+ va_list args;
+ char *buf;
+#ifdef ANSI_PROTOTYPES
+ va_start (args, format);
+#else
+ serial_t desc;
+ char *format;
+
+ va_start (args);
+ desc = va_arg (args, serial_t);
+ format = va_arg (args, char *);
#endif
-#if 0
+ vasprintf (&buf, format, args);
+ SERIAL_WRITE (desc, buf, strlen (buf));
+
+ free (buf);
+ va_end (args);
+}
+
void
_initialize_serial ()
{
+ struct cmd_list_element *cmd;
+
+#if 0
add_com ("connect", class_obscure, connect_command,
"Connect the terminal directly up to the command monitor.\n\
Use <CR>~. or <CR>~^D to break out.");
+#endif /* 0 */
+
+ add_show_from_set (add_set_cmd ("remotelogfile", no_class,
+ var_filename, (char *)&serial_logfile,
+ "Set filename for remote session recording.\n\
+This file is used to record the remote session for future playback\n\
+by gdbserver.", &setlist),
+ &showlist);
+
+ add_show_from_set (add_set_enum_cmd ("remotelogbase", no_class,
+ logbase_enums,
+ (char *)&serial_logbase,
+ "Set ...",
+ &setlist),
+ &showlist);
}
-#endif
projects / binutils-gdb.git / blobdiff