/* Serial interface for local (hardwired) serial ports on Un*x like systems
- Copyright 1992, 1993 Free Software Foundation, Inc.
-This file is part of GDB.
+ Copyright (C) 1992-2020 Free Software Foundation, Inc.
-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 file is part of GDB.
-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.
+ 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.
-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. */
+ 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 <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "serial.h"
+#include "ser-base.h"
+#include "ser-unix.h"
+
#include <fcntl.h>
#include <sys/types.h>
-#include <sys/time.h>
-
-#if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY)
-#define HAVE_SGTTY
-#endif
+#include "terminal.h"
+#include <sys/socket.h>
+#include "gdbsupport/gdb_sys_time.h"
-#ifdef HAVE_TERMIOS
+#include "gdbsupport/gdb_select.h"
+#include "gdbcmd.h"
+#include "gdbsupport/filestuff.h"
#include <termios.h>
-#include <unistd.h>
-#endif
-#ifdef HAVE_TERMIO
-#include <sys/termio.h>
-#endif
-#ifdef HAVE_SGTTY
-#include <sgtty.h>
+#include "inflow.h"
+
+struct hardwire_ttystate
+ {
+ struct termios termios;
+ };
+
+#ifdef CRTSCTS
+/* Boolean to explicitly enable or disable h/w flow control. */
+static bool serial_hwflow;
+static void
+show_serial_hwflow (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("Hardware flow control is %s.\n"), value);
+}
#endif
-/* Open up a real live device for serial I/O */
+static int hardwire_open (struct serial *scb, const char *name);
+static void hardwire_raw (struct serial *scb);
+static int rate_to_code (int rate);
+static int hardwire_setbaudrate (struct serial *scb, int rate);
+static int hardwire_setparity (struct serial *scb, int parity);
+static void hardwire_close (struct serial *scb);
+static int get_tty_state (struct serial *scb,
+ struct hardwire_ttystate * state);
+static int set_tty_state (struct serial *scb,
+ struct hardwire_ttystate * state);
+static serial_ttystate hardwire_get_tty_state (struct serial *scb);
+static int hardwire_set_tty_state (struct serial *scb, serial_ttystate state);
+static void hardwire_print_tty_state (struct serial *, serial_ttystate,
+ struct ui_file *);
+static int hardwire_drain_output (struct serial *);
+static int hardwire_flush_output (struct serial *);
+static int hardwire_flush_input (struct serial *);
+static int hardwire_send_break (struct serial *);
+static int hardwire_setstopbits (struct serial *, int);
+
+/* Open up a real live device for serial I/O. */
static int
-hardwire_open(scb, name)
- serial_t scb;
- const char *name;
+hardwire_open (struct serial *scb, const char *name)
{
- scb->fd = open (name, O_RDWR);
+ scb->fd = gdb_open_cloexec (name, O_RDWR, 0);
if (scb->fd < 0)
return -1;
return 0;
}
-static void
-hardwire_raw(scb)
- serial_t scb;
+static int
+get_tty_state (struct serial *scb, struct hardwire_ttystate *state)
{
-#ifdef HAVE_TERMIOS
- struct termios termios;
+ if (tcgetattr (scb->fd, &state->termios) < 0)
+ return -1;
- if (tcgetattr(scb->fd, &termios))
- {
- fprintf(stderr, "tcgetattr failed: %s\n", safe_strerror(errno));
- }
+ return 0;
+}
- termios.c_iflag = 0;
- termios.c_oflag = 0;
- termios.c_lflag = 0;
- termios.c_cflag &= ~(CSIZE|PARENB);
- termios.c_cflag |= CS8;
- termios.c_cc[VMIN] = 0;
- termios.c_cc[VTIME] = 0;
+static int
+set_tty_state (struct serial *scb, struct hardwire_ttystate *state)
+{
+ if (tcsetattr (scb->fd, TCSANOW, &state->termios) < 0)
+ return -1;
- if (tcsetattr(scb->fd, TCSANOW, &termios))
- {
- fprintf(stderr, "tcsetattr failed: %s\n", safe_strerror(errno));
- }
-#endif
+ return 0;
+}
-#ifdef HAVE_TERMIO
- struct termio termio;
+static serial_ttystate
+hardwire_get_tty_state (struct serial *scb)
+{
+ struct hardwire_ttystate *state = XNEW (struct hardwire_ttystate);
- if (ioctl (scb->fd, TCGETA, &termio))
+ if (get_tty_state (scb, state))
{
- fprintf(stderr, "TCGETA failed: %s\n", safe_strerror(errno));
+ xfree (state);
+ return NULL;
}
- termio.c_iflag = 0;
- termio.c_oflag = 0;
- termio.c_lflag = 0;
- termio.c_cflag &= ~(CSIZE|PARENB);
- termio.c_cflag |= CS8;
- termio.c_cc[VMIN] = 0;
- termio.c_cc[VTIME] = 0;
+ return (serial_ttystate) state;
+}
- if (ioctl (scb->fd, TCSETA, &termio))
- {
- fprintf(stderr, "TCSETA failed: %s\n", safe_strerror(errno));
- }
-#endif
+static serial_ttystate
+hardwire_copy_tty_state (struct serial *scb, serial_ttystate ttystate)
+{
+ struct hardwire_ttystate *state = XNEW (struct hardwire_ttystate);
+
+ *state = *(struct hardwire_ttystate *) ttystate;
+
+ return (serial_ttystate) state;
+}
-#ifdef HAVE_SGTTY
- struct sgttyb sgttyb;
+static int
+hardwire_set_tty_state (struct serial *scb, serial_ttystate ttystate)
+{
+ struct hardwire_ttystate *state;
- if (ioctl (scb->fd, TIOCGETP, &sgttyb))
- fprintf(stderr, "TIOCGETP failed: %s\n", safe_strerror(errno));
+ state = (struct hardwire_ttystate *) ttystate;
+
+ return set_tty_state (scb, state);
+}
- sgttyb.sg_flags |= RAW | ANYP;
- sgttyb.sg_flags &= ~(CBREAK | ECHO);
+static void
+hardwire_print_tty_state (struct serial *scb,
+ serial_ttystate ttystate,
+ struct ui_file *stream)
+{
+ struct hardwire_ttystate *state = (struct hardwire_ttystate *) ttystate;
+ int i;
- if (ioctl (scb->fd, TIOCSETP, &sgttyb))
- fprintf(stderr, "TIOCSETP failed: %s\n", safe_strerror(errno));
+ fprintf_filtered (stream, "c_iflag = 0x%x, c_oflag = 0x%x,\n",
+ (int) state->termios.c_iflag,
+ (int) state->termios.c_oflag);
+ fprintf_filtered (stream, "c_cflag = 0x%x, c_lflag = 0x%x\n",
+ (int) state->termios.c_cflag,
+ (int) state->termios.c_lflag);
+#if 0
+ /* This not in POSIX, and is not really documented by those systems
+ which have it (at least not Sun). */
+ fprintf_filtered (stream, "c_line = 0x%x.\n", state->termios.c_line);
#endif
+ fprintf_filtered (stream, "c_cc: ");
+ for (i = 0; i < NCCS; i += 1)
+ fprintf_filtered (stream, "0x%x ", state->termios.c_cc[i]);
+ fprintf_filtered (stream, "\n");
}
-/* Read a character with user-specified timeout. TIMEOUT is number of seconds
- to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
- char if successful. Returns -2 if timeout expired, EOF if line dropped
- dead, or -3 for any other error (see errno in that case). */
+/* Wait for the output to drain away, as opposed to flushing
+ (discarding) it. */
static int
-hardwire_readchar(scb, timeout)
- serial_t scb;
- int timeout;
+hardwire_drain_output (struct serial *scb)
{
- int numfds;
- struct timeval tv;
- fd_set readfds;
+ /* Ignore SIGTTOU which may occur during the drain. */
+ scoped_ignore_sigttou ignore_sigttou;
- if (scb->bufcnt-- > 0)
- return *scb->bufp++;
-
- FD_ZERO (&readfds);
-
- tv.tv_sec = timeout;
- tv.tv_usec = 0;
+ return tcdrain (scb->fd);
+}
- FD_SET(scb->fd, &readfds);
+static int
+hardwire_flush_output (struct serial *scb)
+{
+ return tcflush (scb->fd, TCOFLUSH);
+}
- if (timeout >= 0)
- numfds = select(scb->fd+1, &readfds, 0, 0, &tv);
- else
- numfds = select(scb->fd+1, &readfds, 0, 0, 0);
+static int
+hardwire_flush_input (struct serial *scb)
+{
+ ser_base_flush_input (scb);
- if (numfds <= 0)
- if (numfds == 0)
- return SERIAL_TIMEOUT;
- else
- return SERIAL_ERROR; /* Got an error from select */
+ return tcflush (scb->fd, TCIFLUSH);
+}
- scb->bufcnt = read(scb->fd, scb->buf, BUFSIZ);
+static int
+hardwire_send_break (struct serial *scb)
+{
+ return tcsendbreak (scb->fd, 0);
+}
- if (scb->bufcnt <= 0)
- if (scb->bufcnt == 0)
- return SERIAL_EOF; /* 0 chars means end of file */
- else
- return SERIAL_ERROR; /* Got an error from read */
+static void
+hardwire_raw (struct serial *scb)
+{
+ struct hardwire_ttystate state;
+
+ if (get_tty_state (scb, &state))
+ fprintf_unfiltered (gdb_stderr, "get_tty_state failed: %s\n",
+ safe_strerror (errno));
+
+ state.termios.c_iflag = 0;
+ state.termios.c_oflag = 0;
+ state.termios.c_lflag = 0;
+ state.termios.c_cflag &= ~CSIZE;
+ state.termios.c_cflag |= CLOCAL | CS8;
+#ifdef CRTSCTS
+ /* h/w flow control. */
+ if (serial_hwflow)
+ state.termios.c_cflag |= CRTSCTS;
+ else
+ state.termios.c_cflag &= ~CRTSCTS;
+#ifdef CRTS_IFLOW
+ if (serial_hwflow)
+ state.termios.c_cflag |= CRTS_IFLOW;
+ else
+ state.termios.c_cflag &= ~CRTS_IFLOW;
+#endif
+#endif
+ state.termios.c_cc[VMIN] = 0;
+ state.termios.c_cc[VTIME] = 0;
- scb->bufcnt--;
- scb->bufp = scb->buf;
- return *scb->bufp++;
+ if (set_tty_state (scb, &state))
+ fprintf_unfiltered (gdb_stderr, "set_tty_state failed: %s\n",
+ safe_strerror (errno));
}
#ifndef B19200
}
baudtab[] =
{
- {50, B50},
- {75, B75},
- {110, B110},
- {134, B134},
- {150, B150},
- {200, B200},
- {300, B300},
- {600, B600},
- {1200, B1200},
- {1800, B1800},
- {2400, B2400},
- {4800, B4800},
- {9600, B9600},
- {19200, B19200},
- {38400, B38400},
- {-1, -1},
+ {
+ 50, B50
+ }
+ ,
+ {
+ 75, B75
+ }
+ ,
+ {
+ 110, B110
+ }
+ ,
+ {
+ 134, B134
+ }
+ ,
+ {
+ 150, B150
+ }
+ ,
+ {
+ 200, B200
+ }
+ ,
+ {
+ 300, B300
+ }
+ ,
+ {
+ 600, B600
+ }
+ ,
+ {
+ 1200, B1200
+ }
+ ,
+ {
+ 1800, B1800
+ }
+ ,
+ {
+ 2400, B2400
+ }
+ ,
+ {
+ 4800, B4800
+ }
+ ,
+ {
+ 9600, B9600
+ }
+ ,
+ {
+ 19200, B19200
+ }
+ ,
+ {
+ 38400, B38400
+ }
+ ,
+#ifdef B57600
+ {
+ 57600, B57600
+ }
+ ,
+#endif
+#ifdef B115200
+ {
+ 115200, B115200
+ }
+ ,
+#endif
+#ifdef B230400
+ {
+ 230400, B230400
+ }
+ ,
+#endif
+#ifdef B460800
+ {
+ 460800, B460800
+ }
+ ,
+#endif
+ {
+ -1, -1
+ }
+ ,
};
-static int
-rate_to_code(rate)
- int rate;
+static int
+rate_to_code (int rate)
{
int i;
for (i = 0; baudtab[i].rate != -1; i++)
- if (rate == baudtab[i].rate)
- return baudtab[i].code;
-
+ {
+ /* test for perfect macth. */
+ if (rate == baudtab[i].rate)
+ return baudtab[i].code;
+ else
+ {
+ /* check if it is in between valid values. */
+ if (rate < baudtab[i].rate)
+ {
+ if (i)
+ {
+ warning (_("Invalid baud rate %d. "
+ "Closest values are %d and %d."),
+ rate, baudtab[i - 1].rate, baudtab[i].rate);
+ }
+ else
+ {
+ warning (_("Invalid baud rate %d. Minimum value is %d."),
+ rate, baudtab[0].rate);
+ }
+ return -1;
+ }
+ }
+ }
+
+ /* The requested speed was too large. */
+ warning (_("Invalid baud rate %d. Maximum value is %d."),
+ rate, baudtab[i - 1].rate);
return -1;
}
static int
-hardwire_setbaudrate(scb, rate)
- serial_t scb;
- int rate;
+hardwire_setbaudrate (struct serial *scb, int rate)
{
-#ifdef HAVE_TERMIOS
- struct termios termios;
-
- if (tcgetattr (scb->fd, &termios))
- return -1;
-
- cfsetospeed (&termios, rate_to_code (rate));
- cfsetispeed (&termios, rate_to_code (rate));
+ struct hardwire_ttystate state;
+ int baud_code = rate_to_code (rate);
+
+ if (baud_code < 0)
+ {
+ /* The baud rate was not valid.
+ A warning has already been issued. */
+ errno = EINVAL;
+ return -1;
+ }
- if (tcsetattr (scb->fd, TCSANOW, &termios))
+ if (get_tty_state (scb, &state))
return -1;
-#endif
-#ifdef HAVE_TERMIO
- struct termio termio;
+ cfsetospeed (&state.termios, baud_code);
+ cfsetispeed (&state.termios, baud_code);
- if (ioctl (scb->fd, TCGETA, &termio))
- return -1;
-
-#ifndef CIBAUD
-#define CIBAUD CBAUD
-#endif
+ return set_tty_state (scb, &state);
+}
- termio.c_cflag &= ~(CBAUD | CIBAUD);
- termio.c_cflag |= rate_to_code (rate);
+static int
+hardwire_setstopbits (struct serial *scb, int num)
+{
+ struct hardwire_ttystate state;
+ int newbit;
- if (ioctl (scb->fd, TCSETA, &termio))
+ if (get_tty_state (scb, &state))
return -1;
-#endif
-#ifdef HAVE_SGTTY
- struct sgttyb sgttyb;
-
- if (ioctl (scb->fd, TIOCGETP, &sgttyb))
- return -1;
+ switch (num)
+ {
+ case SERIAL_1_STOPBITS:
+ newbit = 0;
+ break;
+ case SERIAL_1_AND_A_HALF_STOPBITS:
+ case SERIAL_2_STOPBITS:
+ newbit = 1;
+ break;
+ default:
+ return 1;
+ }
- sgttyb.sg_ispeed = rate_to_code (rate);
- sgttyb.sg_ospeed = rate_to_code (rate);
+ if (!newbit)
+ state.termios.c_cflag &= ~CSTOPB;
+ else
+ state.termios.c_cflag |= CSTOPB; /* two bits */
- if (ioctl (scb->fd, TIOCSETP, &sgttyb))
- return -1;
-#endif
- return 0;
+ return set_tty_state (scb, &state);
}
+/* Implement the "setparity" serial_ops callback. */
+
static int
-hardwire_write(scb, str, len)
- serial_t scb;
- const char *str;
- int len;
+hardwire_setparity (struct serial *scb, int parity)
{
- int cc;
+ struct hardwire_ttystate state;
+ int newparity = 0;
- while (len > 0)
- {
- cc = write(scb->fd, str, len);
+ if (get_tty_state (scb, &state))
+ return -1;
- if (cc < 0)
- return 1;
- len -= cc;
- str += cc;
+ switch (parity)
+ {
+ case GDBPARITY_NONE:
+ newparity = 0;
+ break;
+ case GDBPARITY_ODD:
+ newparity = PARENB | PARODD;
+ break;
+ case GDBPARITY_EVEN:
+ newparity = PARENB;
+ break;
+ default:
+ internal_warning (__FILE__, __LINE__,
+ "Incorrect parity value: %d", parity);
+ return -1;
}
- return 0;
-}
-static void
-hardwire_restore(scb)
- serial_t scb;
-{
+ state.termios.c_cflag &= ~(PARENB | PARODD);
+ state.termios.c_cflag |= newparity;
+
+ return set_tty_state (scb, &state);
}
+
static void
-hardwire_close(scb)
- serial_t scb;
+hardwire_close (struct serial *scb)
{
if (scb->fd < 0)
return;
- close(scb->fd);
+ close (scb->fd);
scb->fd = -1;
}
+\f
+\f
-static struct serial_ops hardwire_ops =
+/* The hardwire ops. */
+
+static const struct serial_ops hardwire_ops =
{
"hardwire",
- 0,
hardwire_open,
hardwire_close,
- hardwire_readchar,
- hardwire_write,
+ NULL,
+ ser_base_readchar,
+ ser_base_write,
+ hardwire_flush_output,
+ hardwire_flush_input,
+ hardwire_send_break,
hardwire_raw,
- hardwire_restore,
- hardwire_setbaudrate
+ hardwire_get_tty_state,
+ hardwire_copy_tty_state,
+ hardwire_set_tty_state,
+ hardwire_print_tty_state,
+ hardwire_setbaudrate,
+ hardwire_setstopbits,
+ hardwire_setparity,
+ hardwire_drain_output,
+ ser_base_async,
+ ser_unix_read_prim,
+ ser_unix_write_prim
};
+void _initialize_ser_hardwire ();
+void
_initialize_ser_hardwire ()
{
serial_add_interface (&hardwire_ops);
+
+#ifdef CRTSCTS
+ add_setshow_boolean_cmd ("remoteflow", no_class,
+ &serial_hwflow, _("\
+Set use of hardware flow control for remote serial I/O."), _("\
+Show use of hardware flow control for remote serial I/O."), _("\
+Enable or disable hardware flow control (RTS/CTS) on the serial port\n\
+when debugging using remote targets."),
+ NULL,
+ show_serial_hwflow,
+ &setlist, &showlist);
+#endif
+}
+
+int
+ser_unix_read_prim (struct serial *scb, size_t count)
+{
+ return read (scb->fd, scb->buf, count);
+}
+
+int
+ser_unix_write_prim (struct serial *scb, const void *buf, size_t len)
+{
+ return write (scb->fd, buf, len);
}
projects / deliverable / binutils-gdb.git / blobdiff