mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
1e182ce8c3
(terminal_save_ours): Remove misleading comment. (inflow_inferior_data_cleanup): Free ttystate. (inflow_inferior_exit): Likewise. (copy_terminal_info): Copy ttystate. * serial.c (serial_copy_tty_state): New function. * serial.h (serial_copy_tty_state): Add prototype. (struct serial_ops): Add copy_tty_state callback. * ser-base.c (ser_base_copy_tty_state): New function. * ser-base.h (ser_base_copy_tty_state): Add prototype. * ser-go32.c (dos_copy_tty_state): New function. (dos_ops): Install copy_tty_state callback. * ser-mingw.c (_initialize_ser_windows): Likewise. * ser-pipe.c (_initialize_ser_pipe): Likewise. * ser-unix.c (hardwire_copy_tty_state): New function. (_initialize_ser_hardwire): Install it.
973 lines
22 KiB
C
973 lines
22 KiB
C
/* Serial interface for local (hardwired) serial ports on Un*x like systems
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Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2003,
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2004, 2005, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "serial.h"
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#include "ser-base.h"
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#include "ser-unix.h"
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#include <fcntl.h>
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#include <sys/types.h>
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#include "terminal.h"
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#include <sys/socket.h>
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#include <sys/time.h>
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#include "gdb_select.h"
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#include "gdb_string.h"
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#include "gdbcmd.h"
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#ifdef HAVE_TERMIOS
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struct hardwire_ttystate
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{
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struct termios termios;
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};
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#ifdef CRTSCTS
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/* Boolean to explicitly enable or disable h/w flow control. */
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static int serial_hwflow;
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static void
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show_serial_hwflow (struct ui_file *file, int from_tty,
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struct cmd_list_element *c, const char *value)
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{
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fprintf_filtered (file, _("Hardware flow control is %s.\n"), value);
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}
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#endif
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#endif /* termios */
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#ifdef HAVE_TERMIO
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/* It is believed that all systems which have added job control to SVR3
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(e.g. sco) have also added termios. Even if not, trying to figure out
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all the variations (TIOCGPGRP vs. TCGETPGRP, etc.) would be pretty
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bewildering. So we don't attempt it. */
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struct hardwire_ttystate
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{
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struct termio termio;
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};
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#endif /* termio */
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#ifdef HAVE_SGTTY
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struct hardwire_ttystate
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{
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struct sgttyb sgttyb;
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struct tchars tc;
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struct ltchars ltc;
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/* Line discipline flags. */
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int lmode;
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};
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#endif /* sgtty */
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static int hardwire_open (struct serial *scb, const char *name);
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static void hardwire_raw (struct serial *scb);
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static int wait_for (struct serial *scb, int timeout);
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static int hardwire_readchar (struct serial *scb, int timeout);
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static int do_hardwire_readchar (struct serial *scb, int timeout);
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static int rate_to_code (int rate);
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static int hardwire_setbaudrate (struct serial *scb, int rate);
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static void hardwire_close (struct serial *scb);
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static int get_tty_state (struct serial *scb,
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struct hardwire_ttystate * state);
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static int set_tty_state (struct serial *scb,
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struct hardwire_ttystate * state);
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static serial_ttystate hardwire_get_tty_state (struct serial *scb);
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static int hardwire_set_tty_state (struct serial *scb, serial_ttystate state);
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static int hardwire_noflush_set_tty_state (struct serial *, serial_ttystate,
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serial_ttystate);
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static void hardwire_print_tty_state (struct serial *, serial_ttystate,
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struct ui_file *);
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static int hardwire_drain_output (struct serial *);
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static int hardwire_flush_output (struct serial *);
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static int hardwire_flush_input (struct serial *);
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static int hardwire_send_break (struct serial *);
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static int hardwire_setstopbits (struct serial *, int);
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void _initialize_ser_hardwire (void);
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/* Open up a real live device for serial I/O. */
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static int
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hardwire_open (struct serial *scb, const char *name)
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{
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scb->fd = open (name, O_RDWR);
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if (scb->fd < 0)
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return -1;
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return 0;
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}
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static int
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get_tty_state (struct serial *scb, struct hardwire_ttystate *state)
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{
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#ifdef HAVE_TERMIOS
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if (tcgetattr (scb->fd, &state->termios) < 0)
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return -1;
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return 0;
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#endif
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#ifdef HAVE_TERMIO
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if (ioctl (scb->fd, TCGETA, &state->termio) < 0)
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return -1;
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return 0;
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#endif
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#ifdef HAVE_SGTTY
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if (ioctl (scb->fd, TIOCGETP, &state->sgttyb) < 0)
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return -1;
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if (ioctl (scb->fd, TIOCGETC, &state->tc) < 0)
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return -1;
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if (ioctl (scb->fd, TIOCGLTC, &state->ltc) < 0)
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return -1;
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if (ioctl (scb->fd, TIOCLGET, &state->lmode) < 0)
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return -1;
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return 0;
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#endif
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}
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static int
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set_tty_state (struct serial *scb, struct hardwire_ttystate *state)
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{
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#ifdef HAVE_TERMIOS
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if (tcsetattr (scb->fd, TCSANOW, &state->termios) < 0)
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return -1;
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return 0;
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#endif
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#ifdef HAVE_TERMIO
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if (ioctl (scb->fd, TCSETA, &state->termio) < 0)
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return -1;
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return 0;
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#endif
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#ifdef HAVE_SGTTY
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if (ioctl (scb->fd, TIOCSETN, &state->sgttyb) < 0)
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return -1;
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if (ioctl (scb->fd, TIOCSETC, &state->tc) < 0)
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return -1;
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if (ioctl (scb->fd, TIOCSLTC, &state->ltc) < 0)
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return -1;
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if (ioctl (scb->fd, TIOCLSET, &state->lmode) < 0)
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return -1;
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return 0;
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#endif
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}
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static serial_ttystate
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hardwire_get_tty_state (struct serial *scb)
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{
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struct hardwire_ttystate *state;
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state = (struct hardwire_ttystate *) xmalloc (sizeof *state);
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if (get_tty_state (scb, state))
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return NULL;
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return (serial_ttystate) state;
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}
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static serial_ttystate
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hardwire_copy_tty_state (struct serial *scb, serial_ttystate ttystate)
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{
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struct hardwire_ttystate *state;
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state = (struct hardwire_ttystate *) xmalloc (sizeof *state);
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*state = *(struct hardwire_ttystate *) ttystate;
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return (serial_ttystate) state;
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}
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static int
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hardwire_set_tty_state (struct serial *scb, serial_ttystate ttystate)
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{
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struct hardwire_ttystate *state;
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state = (struct hardwire_ttystate *) ttystate;
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return set_tty_state (scb, state);
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}
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static int
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hardwire_noflush_set_tty_state (struct serial *scb,
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serial_ttystate new_ttystate,
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serial_ttystate old_ttystate)
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{
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struct hardwire_ttystate new_state;
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#ifdef HAVE_SGTTY
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struct hardwire_ttystate *state = (struct hardwire_ttystate *) old_ttystate;
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#endif
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new_state = *(struct hardwire_ttystate *) new_ttystate;
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/* Don't change in or out of raw mode; we don't want to flush input.
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termio and termios have no such restriction; for them flushing input
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is separate from setting the attributes. */
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#ifdef HAVE_SGTTY
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if (state->sgttyb.sg_flags & RAW)
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new_state.sgttyb.sg_flags |= RAW;
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else
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new_state.sgttyb.sg_flags &= ~RAW;
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/* I'm not sure whether this is necessary; the manpage just mentions
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RAW not CBREAK. */
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if (state->sgttyb.sg_flags & CBREAK)
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new_state.sgttyb.sg_flags |= CBREAK;
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else
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new_state.sgttyb.sg_flags &= ~CBREAK;
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#endif
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return set_tty_state (scb, &new_state);
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}
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static void
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hardwire_print_tty_state (struct serial *scb,
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serial_ttystate ttystate,
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struct ui_file *stream)
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{
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struct hardwire_ttystate *state = (struct hardwire_ttystate *) ttystate;
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int i;
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#ifdef HAVE_TERMIOS
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fprintf_filtered (stream, "c_iflag = 0x%x, c_oflag = 0x%x,\n",
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(int) state->termios.c_iflag,
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(int) state->termios.c_oflag);
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fprintf_filtered (stream, "c_cflag = 0x%x, c_lflag = 0x%x\n",
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(int) state->termios.c_cflag,
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(int) state->termios.c_lflag);
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#if 0
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/* This not in POSIX, and is not really documented by those systems
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which have it (at least not Sun). */
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fprintf_filtered (stream, "c_line = 0x%x.\n", state->termios.c_line);
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#endif
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fprintf_filtered (stream, "c_cc: ");
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for (i = 0; i < NCCS; i += 1)
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fprintf_filtered (stream, "0x%x ", state->termios.c_cc[i]);
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fprintf_filtered (stream, "\n");
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#endif
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#ifdef HAVE_TERMIO
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fprintf_filtered (stream, "c_iflag = 0x%x, c_oflag = 0x%x,\n",
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state->termio.c_iflag, state->termio.c_oflag);
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fprintf_filtered (stream, "c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n",
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state->termio.c_cflag, state->termio.c_lflag,
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state->termio.c_line);
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fprintf_filtered (stream, "c_cc: ");
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for (i = 0; i < NCC; i += 1)
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fprintf_filtered (stream, "0x%x ", state->termio.c_cc[i]);
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fprintf_filtered (stream, "\n");
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#endif
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#ifdef HAVE_SGTTY
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fprintf_filtered (stream, "sgttyb.sg_flags = 0x%x.\n",
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state->sgttyb.sg_flags);
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fprintf_filtered (stream, "tchars: ");
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for (i = 0; i < (int) sizeof (struct tchars); i++)
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fprintf_filtered (stream, "0x%x ", ((unsigned char *) &state->tc)[i]);
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fprintf_filtered (stream, "\n");
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fprintf_filtered (stream, "ltchars: ");
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for (i = 0; i < (int) sizeof (struct ltchars); i++)
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fprintf_filtered (stream, "0x%x ", ((unsigned char *) &state->ltc)[i]);
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fprintf_filtered (stream, "\n");
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fprintf_filtered (stream, "lmode: 0x%x\n", state->lmode);
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#endif
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}
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/* Wait for the output to drain away, as opposed to flushing
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(discarding) it. */
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static int
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hardwire_drain_output (struct serial *scb)
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{
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#ifdef HAVE_TERMIOS
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return tcdrain (scb->fd);
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#endif
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#ifdef HAVE_TERMIO
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return ioctl (scb->fd, TCSBRK, 1);
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#endif
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#ifdef HAVE_SGTTY
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/* Get the current state and then restore it using TIOCSETP,
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which should cause the output to drain and pending input
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to be discarded. */
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{
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struct hardwire_ttystate state;
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if (get_tty_state (scb, &state))
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{
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return (-1);
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}
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else
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{
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return (ioctl (scb->fd, TIOCSETP, &state.sgttyb));
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}
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}
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#endif
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}
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static int
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hardwire_flush_output (struct serial *scb)
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{
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#ifdef HAVE_TERMIOS
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return tcflush (scb->fd, TCOFLUSH);
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#endif
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#ifdef HAVE_TERMIO
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return ioctl (scb->fd, TCFLSH, 1);
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#endif
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#ifdef HAVE_SGTTY
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/* This flushes both input and output, but we can't do better. */
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return ioctl (scb->fd, TIOCFLUSH, 0);
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#endif
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}
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static int
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hardwire_flush_input (struct serial *scb)
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{
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ser_base_flush_input (scb);
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#ifdef HAVE_TERMIOS
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return tcflush (scb->fd, TCIFLUSH);
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#endif
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#ifdef HAVE_TERMIO
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return ioctl (scb->fd, TCFLSH, 0);
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#endif
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#ifdef HAVE_SGTTY
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/* This flushes both input and output, but we can't do better. */
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return ioctl (scb->fd, TIOCFLUSH, 0);
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#endif
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}
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static int
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hardwire_send_break (struct serial *scb)
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{
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#ifdef HAVE_TERMIOS
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return tcsendbreak (scb->fd, 0);
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#endif
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#ifdef HAVE_TERMIO
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return ioctl (scb->fd, TCSBRK, 0);
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#endif
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#ifdef HAVE_SGTTY
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{
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int status;
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status = ioctl (scb->fd, TIOCSBRK, 0);
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/* Can't use usleep; it doesn't exist in BSD 4.2. */
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/* Note that if this gdb_select() is interrupted by a signal it will not
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wait the full length of time. I think that is OK. */
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gdb_usleep (250000);
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status = ioctl (scb->fd, TIOCCBRK, 0);
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return status;
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}
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#endif
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}
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static void
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hardwire_raw (struct serial *scb)
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{
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struct hardwire_ttystate state;
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if (get_tty_state (scb, &state))
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fprintf_unfiltered (gdb_stderr, "get_tty_state failed: %s\n",
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safe_strerror (errno));
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#ifdef HAVE_TERMIOS
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state.termios.c_iflag = 0;
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state.termios.c_oflag = 0;
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state.termios.c_lflag = 0;
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state.termios.c_cflag &= ~(CSIZE | PARENB);
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state.termios.c_cflag |= CLOCAL | CS8;
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#ifdef CRTSCTS
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/* h/w flow control. */
|
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if (serial_hwflow)
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state.termios.c_cflag |= CRTSCTS;
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else
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state.termios.c_cflag &= ~CRTSCTS;
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#ifdef CRTS_IFLOW
|
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if (serial_hwflow)
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state.termios.c_cflag |= CRTS_IFLOW;
|
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else
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state.termios.c_cflag &= ~CRTS_IFLOW;
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#endif
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#endif
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state.termios.c_cc[VMIN] = 0;
|
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state.termios.c_cc[VTIME] = 0;
|
||
#endif
|
||
|
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#ifdef HAVE_TERMIO
|
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state.termio.c_iflag = 0;
|
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state.termio.c_oflag = 0;
|
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state.termio.c_lflag = 0;
|
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state.termio.c_cflag &= ~(CSIZE | PARENB);
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state.termio.c_cflag |= CLOCAL | CS8;
|
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state.termio.c_cc[VMIN] = 0;
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state.termio.c_cc[VTIME] = 0;
|
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#endif
|
||
|
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#ifdef HAVE_SGTTY
|
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state.sgttyb.sg_flags |= RAW | ANYP;
|
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state.sgttyb.sg_flags &= ~(CBREAK | ECHO);
|
||
#endif
|
||
|
||
scb->current_timeout = 0;
|
||
|
||
if (set_tty_state (scb, &state))
|
||
fprintf_unfiltered (gdb_stderr, "set_tty_state failed: %s\n",
|
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safe_strerror (errno));
|
||
}
|
||
|
||
/* Wait for input on scb, with timeout seconds. Returns 0 on success,
|
||
otherwise SERIAL_TIMEOUT or SERIAL_ERROR.
|
||
|
||
For termio{s}, we actually just setup VTIME if necessary, and let the
|
||
timeout occur in the read() in hardwire_read(). */
|
||
|
||
/* FIXME: cagney/1999-09-16: Don't replace this with the equivalent
|
||
ser_base*() until the old TERMIOS/SGTTY/... timer code has been
|
||
flushed. . */
|
||
|
||
/* NOTE: cagney/1999-09-30: Much of the code below is dead. The only
|
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possible values of the TIMEOUT parameter are ONE and ZERO.
|
||
Consequently all the code that tries to handle the possability of
|
||
an overflowed timer is unnecessary. */
|
||
|
||
static int
|
||
wait_for (struct serial *scb, int timeout)
|
||
{
|
||
#ifdef HAVE_SGTTY
|
||
while (1)
|
||
{
|
||
struct timeval tv;
|
||
fd_set readfds;
|
||
int numfds;
|
||
|
||
/* NOTE: Some OS's can scramble the READFDS when the select()
|
||
call fails (ex the kernel with Red Hat 5.2). Initialize all
|
||
arguments before each call. */
|
||
|
||
tv.tv_sec = timeout;
|
||
tv.tv_usec = 0;
|
||
|
||
FD_ZERO (&readfds);
|
||
FD_SET (scb->fd, &readfds);
|
||
|
||
if (timeout >= 0)
|
||
numfds = gdb_select (scb->fd + 1, &readfds, 0, 0, &tv);
|
||
else
|
||
numfds = gdb_select (scb->fd + 1, &readfds, 0, 0, 0);
|
||
|
||
if (numfds <= 0)
|
||
if (numfds == 0)
|
||
return SERIAL_TIMEOUT;
|
||
else if (errno == EINTR)
|
||
continue;
|
||
else
|
||
return SERIAL_ERROR; /* Got an error from select or poll. */
|
||
|
||
return 0;
|
||
}
|
||
#endif /* HAVE_SGTTY */
|
||
|
||
#if defined HAVE_TERMIO || defined HAVE_TERMIOS
|
||
if (timeout == scb->current_timeout)
|
||
return 0;
|
||
|
||
scb->current_timeout = timeout;
|
||
|
||
{
|
||
struct hardwire_ttystate state;
|
||
|
||
if (get_tty_state (scb, &state))
|
||
fprintf_unfiltered (gdb_stderr, "get_tty_state failed: %s\n",
|
||
safe_strerror (errno));
|
||
|
||
#ifdef HAVE_TERMIOS
|
||
if (timeout < 0)
|
||
{
|
||
/* No timeout. */
|
||
state.termios.c_cc[VTIME] = 0;
|
||
state.termios.c_cc[VMIN] = 1;
|
||
}
|
||
else
|
||
{
|
||
state.termios.c_cc[VMIN] = 0;
|
||
state.termios.c_cc[VTIME] = timeout * 10;
|
||
if (state.termios.c_cc[VTIME] != timeout * 10)
|
||
{
|
||
|
||
/* If c_cc is an 8-bit signed character, we can't go
|
||
bigger than this. If it is always unsigned, we could use
|
||
25. */
|
||
|
||
scb->current_timeout = 12;
|
||
state.termios.c_cc[VTIME] = scb->current_timeout * 10;
|
||
scb->timeout_remaining = timeout - scb->current_timeout;
|
||
}
|
||
}
|
||
#endif
|
||
|
||
#ifdef HAVE_TERMIO
|
||
if (timeout < 0)
|
||
{
|
||
/* No timeout. */
|
||
state.termio.c_cc[VTIME] = 0;
|
||
state.termio.c_cc[VMIN] = 1;
|
||
}
|
||
else
|
||
{
|
||
state.termio.c_cc[VMIN] = 0;
|
||
state.termio.c_cc[VTIME] = timeout * 10;
|
||
if (state.termio.c_cc[VTIME] != timeout * 10)
|
||
{
|
||
/* If c_cc is an 8-bit signed character, we can't go
|
||
bigger than this. If it is always unsigned, we could use
|
||
25. */
|
||
|
||
scb->current_timeout = 12;
|
||
state.termio.c_cc[VTIME] = scb->current_timeout * 10;
|
||
scb->timeout_remaining = timeout - scb->current_timeout;
|
||
}
|
||
}
|
||
#endif
|
||
|
||
if (set_tty_state (scb, &state))
|
||
fprintf_unfiltered (gdb_stderr, "set_tty_state failed: %s\n",
|
||
safe_strerror (errno));
|
||
|
||
return 0;
|
||
}
|
||
#endif /* HAVE_TERMIO || HAVE_TERMIOS */
|
||
}
|
||
|
||
/* 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 SERIAL_TIMEOUT if
|
||
timeout expired, EOF if line dropped dead, or SERIAL_ERROR for any
|
||
other error (see errno in that case). */
|
||
|
||
/* FIXME: cagney/1999-09-16: Don't replace this with the equivalent
|
||
ser_base*() until the old TERMIOS/SGTTY/... timer code has been
|
||
flushed. */
|
||
|
||
/* NOTE: cagney/1999-09-16: This function is not identical to
|
||
ser_base_readchar() as part of replacing it with ser_base*()
|
||
merging will be required - this code handles the case where read()
|
||
times out due to no data while ser_base_readchar() doesn't expect
|
||
that. */
|
||
|
||
static int
|
||
do_hardwire_readchar (struct serial *scb, int timeout)
|
||
{
|
||
int status, delta;
|
||
int detach = 0;
|
||
|
||
if (timeout > 0)
|
||
timeout++;
|
||
|
||
/* We have to be able to keep the GUI alive here, so we break the
|
||
original timeout into steps of 1 second, running the "keep the
|
||
GUI alive" hook each time through the loop.
|
||
|
||
Also, timeout = 0 means to poll, so we just set the delta to 0,
|
||
so we will only go through the loop once. */
|
||
|
||
delta = (timeout == 0 ? 0 : 1);
|
||
while (1)
|
||
{
|
||
|
||
/* N.B. The UI may destroy our world (for instance by calling
|
||
remote_stop,) in which case we want to get out of here as
|
||
quickly as possible. It is not safe to touch scb, since
|
||
someone else might have freed it. The
|
||
deprecated_ui_loop_hook signals that we should exit by
|
||
returning 1. */
|
||
|
||
if (deprecated_ui_loop_hook)
|
||
detach = deprecated_ui_loop_hook (0);
|
||
|
||
if (detach)
|
||
return SERIAL_TIMEOUT;
|
||
|
||
scb->timeout_remaining = (timeout < 0 ? timeout : timeout - delta);
|
||
status = wait_for (scb, delta);
|
||
|
||
if (status < 0)
|
||
return status;
|
||
|
||
status = read (scb->fd, scb->buf, BUFSIZ);
|
||
|
||
if (status <= 0)
|
||
{
|
||
if (status == 0)
|
||
{
|
||
/* Zero characters means timeout (it could also be EOF, but
|
||
we don't (yet at least) distinguish). */
|
||
if (scb->timeout_remaining > 0)
|
||
{
|
||
timeout = scb->timeout_remaining;
|
||
continue;
|
||
}
|
||
else if (scb->timeout_remaining < 0)
|
||
continue;
|
||
else
|
||
return SERIAL_TIMEOUT;
|
||
}
|
||
else if (errno == EINTR)
|
||
continue;
|
||
else
|
||
return SERIAL_ERROR; /* Got an error from read. */
|
||
}
|
||
|
||
scb->bufcnt = status;
|
||
scb->bufcnt--;
|
||
scb->bufp = scb->buf;
|
||
return *scb->bufp++;
|
||
}
|
||
}
|
||
|
||
static int
|
||
hardwire_readchar (struct serial *scb, int timeout)
|
||
{
|
||
return generic_readchar (scb, timeout, do_hardwire_readchar);
|
||
}
|
||
|
||
|
||
#ifndef B19200
|
||
#define B19200 EXTA
|
||
#endif
|
||
|
||
#ifndef B38400
|
||
#define B38400 EXTB
|
||
#endif
|
||
|
||
/* Translate baud rates from integers to damn B_codes. Unix should
|
||
have outgrown this crap years ago, but even POSIX wouldn't buck it. */
|
||
|
||
static struct
|
||
{
|
||
int rate;
|
||
int code;
|
||
}
|
||
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
|
||
}
|
||
,
|
||
#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 (int rate)
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; baudtab[i].rate != -1; i++)
|
||
{
|
||
/* 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 (struct serial *scb, int 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 (get_tty_state (scb, &state))
|
||
return -1;
|
||
|
||
#ifdef HAVE_TERMIOS
|
||
cfsetospeed (&state.termios, baud_code);
|
||
cfsetispeed (&state.termios, baud_code);
|
||
#endif
|
||
|
||
#ifdef HAVE_TERMIO
|
||
#ifndef CIBAUD
|
||
#define CIBAUD CBAUD
|
||
#endif
|
||
|
||
state.termio.c_cflag &= ~(CBAUD | CIBAUD);
|
||
state.termio.c_cflag |= baud_code;
|
||
#endif
|
||
|
||
#ifdef HAVE_SGTTY
|
||
state.sgttyb.sg_ispeed = baud_code;
|
||
state.sgttyb.sg_ospeed = baud_code;
|
||
#endif
|
||
|
||
return set_tty_state (scb, &state);
|
||
}
|
||
|
||
static int
|
||
hardwire_setstopbits (struct serial *scb, int num)
|
||
{
|
||
struct hardwire_ttystate state;
|
||
int newbit;
|
||
|
||
if (get_tty_state (scb, &state))
|
||
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;
|
||
}
|
||
|
||
#ifdef HAVE_TERMIOS
|
||
if (!newbit)
|
||
state.termios.c_cflag &= ~CSTOPB;
|
||
else
|
||
state.termios.c_cflag |= CSTOPB; /* two bits */
|
||
#endif
|
||
|
||
#ifdef HAVE_TERMIO
|
||
if (!newbit)
|
||
state.termio.c_cflag &= ~CSTOPB;
|
||
else
|
||
state.termio.c_cflag |= CSTOPB; /* two bits */
|
||
#endif
|
||
|
||
#ifdef HAVE_SGTTY
|
||
return 0; /* sgtty doesn't support this */
|
||
#endif
|
||
|
||
return set_tty_state (scb, &state);
|
||
}
|
||
|
||
static void
|
||
hardwire_close (struct serial *scb)
|
||
{
|
||
if (scb->fd < 0)
|
||
return;
|
||
|
||
close (scb->fd);
|
||
scb->fd = -1;
|
||
}
|
||
|
||
|
||
void
|
||
_initialize_ser_hardwire (void)
|
||
{
|
||
struct serial_ops *ops = XMALLOC (struct serial_ops);
|
||
|
||
memset (ops, 0, sizeof (struct serial_ops));
|
||
ops->name = "hardwire";
|
||
ops->next = 0;
|
||
ops->open = hardwire_open;
|
||
ops->close = hardwire_close;
|
||
/* FIXME: Don't replace this with the equivalent ser_base*() until
|
||
the old TERMIOS/SGTTY/... timer code has been flushed. cagney
|
||
1999-09-16. */
|
||
ops->readchar = hardwire_readchar;
|
||
ops->write = ser_base_write;
|
||
ops->flush_output = hardwire_flush_output;
|
||
ops->flush_input = hardwire_flush_input;
|
||
ops->send_break = hardwire_send_break;
|
||
ops->go_raw = hardwire_raw;
|
||
ops->get_tty_state = hardwire_get_tty_state;
|
||
ops->copy_tty_state = hardwire_copy_tty_state;
|
||
ops->set_tty_state = hardwire_set_tty_state;
|
||
ops->print_tty_state = hardwire_print_tty_state;
|
||
ops->noflush_set_tty_state = hardwire_noflush_set_tty_state;
|
||
ops->setbaudrate = hardwire_setbaudrate;
|
||
ops->setstopbits = hardwire_setstopbits;
|
||
ops->drain_output = hardwire_drain_output;
|
||
ops->async = ser_base_async;
|
||
ops->read_prim = ser_unix_read_prim;
|
||
ops->write_prim = ser_unix_write_prim;
|
||
serial_add_interface (ops);
|
||
|
||
#ifdef HAVE_TERMIOS
|
||
#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
|
||
#endif
|
||
}
|
||
|
||
int
|
||
ser_unix_read_prim (struct serial *scb, size_t count)
|
||
{
|
||
int status;
|
||
|
||
while (1)
|
||
{
|
||
status = read (scb->fd, scb->buf, count);
|
||
if (status != -1 || errno != EINTR)
|
||
break;
|
||
}
|
||
return status;
|
||
}
|
||
|
||
int
|
||
ser_unix_write_prim (struct serial *scb, const void *buf, size_t len)
|
||
{
|
||
/* ??? Historically, GDB has not retried calls to "write" that
|
||
result in EINTR. */
|
||
return write (scb->fd, buf, len);
|
||
}
|