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-rw-r--r--gdb/ser-unix.c808
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diff --git a/gdb/ser-unix.c b/gdb/ser-unix.c
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+/* Serial interface for local (hardwired) serial ports on Un*x like systems
+ Copyright 1992, 1993, 1994, 1998 Free Software Foundation, Inc.
+
+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 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 "defs.h"
+#include "serial.h"
+#include <fcntl.h>
+#include <sys/types.h>
+#include "terminal.h"
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef HAVE_TERMIOS
+
+struct hardwire_ttystate
+{
+ struct termios termios;
+};
+#endif /* termios */
+
+#ifdef HAVE_TERMIO
+
+/* It is believed that all systems which have added job control to SVR3
+ (e.g. sco) have also added termios. Even if not, trying to figure out
+ all the variations (TIOCGPGRP vs. TCGETPGRP, etc.) would be pretty
+ bewildering. So we don't attempt it. */
+
+struct hardwire_ttystate
+{
+ struct termio termio;
+};
+#endif /* termio */
+
+#ifdef HAVE_SGTTY
+/* Needed for the code which uses select(). We would include <sys/select.h>
+ too if it existed on all systems. */
+#include <sys/time.h>
+
+struct hardwire_ttystate
+{
+ struct sgttyb sgttyb;
+ struct tchars tc;
+ struct ltchars ltc;
+ /* Line discipline flags. */
+ int lmode;
+};
+#endif /* sgtty */
+
+static int hardwire_open PARAMS ((serial_t scb, const char *name));
+static void hardwire_raw PARAMS ((serial_t scb));
+static int wait_for PARAMS ((serial_t scb, int timeout));
+static int hardwire_readchar PARAMS ((serial_t scb, int timeout));
+static int rate_to_code PARAMS ((int rate));
+static int hardwire_setbaudrate PARAMS ((serial_t scb, int rate));
+static int hardwire_write PARAMS ((serial_t scb, const char *str, int len));
+static void hardwire_close PARAMS ((serial_t scb));
+static int get_tty_state PARAMS ((serial_t scb, struct hardwire_ttystate *state));
+static int set_tty_state PARAMS ((serial_t scb, struct hardwire_ttystate *state));
+static serial_ttystate hardwire_get_tty_state PARAMS ((serial_t scb));
+static int hardwire_set_tty_state PARAMS ((serial_t scb, serial_ttystate state));
+static int hardwire_noflush_set_tty_state PARAMS ((serial_t, serial_ttystate,
+ serial_ttystate));
+static void hardwire_print_tty_state PARAMS ((serial_t, serial_ttystate));
+static int hardwire_drain_output PARAMS ((serial_t));
+static int hardwire_flush_output PARAMS ((serial_t));
+static int hardwire_flush_input PARAMS ((serial_t));
+static int hardwire_send_break PARAMS ((serial_t));
+static int hardwire_setstopbits PARAMS ((serial_t, int));
+
+void _initialize_ser_hardwire PARAMS ((void));
+
+#ifdef __CYGWIN32__
+extern void (*ui_loop_hook) PARAMS ((int));
+#endif
+
+/* Open up a real live device for serial I/O */
+
+static int
+hardwire_open(scb, name)
+ serial_t scb;
+ const char *name;
+{
+ scb->fd = open (name, O_RDWR);
+ if (scb->fd < 0)
+ return -1;
+
+ return 0;
+}
+
+static int
+get_tty_state (scb, state)
+ serial_t scb;
+ struct hardwire_ttystate *state;
+{
+#ifdef HAVE_TERMIOS
+ if (tcgetattr(scb->fd, &state->termios) < 0)
+ return -1;
+
+ return 0;
+#endif
+
+#ifdef HAVE_TERMIO
+ if (ioctl (scb->fd, TCGETA, &state->termio) < 0)
+ return -1;
+ return 0;
+#endif
+
+#ifdef HAVE_SGTTY
+ if (ioctl (scb->fd, TIOCGETP, &state->sgttyb) < 0)
+ return -1;
+ if (ioctl (scb->fd, TIOCGETC, &state->tc) < 0)
+ return -1;
+ if (ioctl (scb->fd, TIOCGLTC, &state->ltc) < 0)
+ return -1;
+ if (ioctl (scb->fd, TIOCLGET, &state->lmode) < 0)
+ return -1;
+
+ return 0;
+#endif
+}
+
+static int
+set_tty_state(scb, state)
+ serial_t scb;
+ struct hardwire_ttystate *state;
+{
+#ifdef HAVE_TERMIOS
+ if (tcsetattr(scb->fd, TCSANOW, &state->termios) < 0)
+ return -1;
+
+ return 0;
+#endif
+
+#ifdef HAVE_TERMIO
+ if (ioctl (scb->fd, TCSETA, &state->termio) < 0)
+ return -1;
+ return 0;
+#endif
+
+#ifdef HAVE_SGTTY
+ if (ioctl (scb->fd, TIOCSETN, &state->sgttyb) < 0)
+ return -1;
+ if (ioctl (scb->fd, TIOCSETC, &state->tc) < 0)
+ return -1;
+ if (ioctl (scb->fd, TIOCSLTC, &state->ltc) < 0)
+ return -1;
+ if (ioctl (scb->fd, TIOCLSET, &state->lmode) < 0)
+ return -1;
+
+ return 0;
+#endif
+}
+
+static serial_ttystate
+hardwire_get_tty_state(scb)
+ serial_t scb;
+{
+ struct hardwire_ttystate *state;
+
+ state = (struct hardwire_ttystate *)xmalloc(sizeof *state);
+
+ if (get_tty_state(scb, state))
+ return NULL;
+
+ return (serial_ttystate)state;
+}
+
+static int
+hardwire_set_tty_state(scb, ttystate)
+ serial_t scb;
+ serial_ttystate ttystate;
+{
+ struct hardwire_ttystate *state;
+
+ state = (struct hardwire_ttystate *)ttystate;
+
+ return set_tty_state(scb, state);
+}
+
+static int
+hardwire_noflush_set_tty_state (scb, new_ttystate, old_ttystate)
+ serial_t scb;
+ serial_ttystate new_ttystate;
+ serial_ttystate old_ttystate;
+{
+ struct hardwire_ttystate new_state;
+#ifdef HAVE_SGTTY
+ struct hardwire_ttystate *state = (struct hardwire_ttystate *) old_ttystate;
+#endif
+
+ new_state = *(struct hardwire_ttystate *)new_ttystate;
+
+ /* Don't change in or out of raw mode; we don't want to flush input.
+ termio and termios have no such restriction; for them flushing input
+ is separate from setting the attributes. */
+
+#ifdef HAVE_SGTTY
+ if (state->sgttyb.sg_flags & RAW)
+ new_state.sgttyb.sg_flags |= RAW;
+ else
+ new_state.sgttyb.sg_flags &= ~RAW;
+
+ /* I'm not sure whether this is necessary; the manpage just mentions
+ RAW not CBREAK. */
+ if (state->sgttyb.sg_flags & CBREAK)
+ new_state.sgttyb.sg_flags |= CBREAK;
+ else
+ new_state.sgttyb.sg_flags &= ~CBREAK;
+#endif
+
+ return set_tty_state (scb, &new_state);
+}
+
+static void
+hardwire_print_tty_state (scb, ttystate)
+ serial_t scb;
+ serial_ttystate ttystate;
+{
+ struct hardwire_ttystate *state = (struct hardwire_ttystate *) ttystate;
+ int i;
+
+#ifdef HAVE_TERMIOS
+ printf_filtered ("c_iflag = 0x%x, c_oflag = 0x%x,\n",
+ state->termios.c_iflag, state->termios.c_oflag);
+ printf_filtered ("c_cflag = 0x%x, c_lflag = 0x%x\n",
+ state->termios.c_cflag, 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). */
+ printf_filtered ("c_line = 0x%x.\n", state->termios.c_line);
+#endif
+ printf_filtered ("c_cc: ");
+ for (i = 0; i < NCCS; i += 1)
+ printf_filtered ("0x%x ", state->termios.c_cc[i]);
+ printf_filtered ("\n");
+#endif
+
+#ifdef HAVE_TERMIO
+ printf_filtered ("c_iflag = 0x%x, c_oflag = 0x%x,\n",
+ state->termio.c_iflag, state->termio.c_oflag);
+ printf_filtered ("c_cflag = 0x%x, c_lflag = 0x%x, c_line = 0x%x.\n",
+ state->termio.c_cflag, state->termio.c_lflag,
+ state->termio.c_line);
+ printf_filtered ("c_cc: ");
+ for (i = 0; i < NCC; i += 1)
+ printf_filtered ("0x%x ", state->termio.c_cc[i]);
+ printf_filtered ("\n");
+#endif
+
+#ifdef HAVE_SGTTY
+ printf_filtered ("sgttyb.sg_flags = 0x%x.\n", state->sgttyb.sg_flags);
+
+ printf_filtered ("tchars: ");
+ for (i = 0; i < (int)sizeof (struct tchars); i++)
+ printf_filtered ("0x%x ", ((unsigned char *)&state->tc)[i]);
+ printf_filtered ("\n");
+
+ printf_filtered ("ltchars: ");
+ for (i = 0; i < (int)sizeof (struct ltchars); i++)
+ printf_filtered ("0x%x ", ((unsigned char *)&state->ltc)[i]);
+ printf_filtered ("\n");
+
+ printf_filtered ("lmode: 0x%x\n", state->lmode);
+#endif
+}
+
+/* Wait for the output to drain away, as opposed to flushing (discarding) it */
+
+static int
+hardwire_drain_output (scb)
+ serial_t scb;
+{
+#ifdef HAVE_TERMIOS
+ return tcdrain (scb->fd);
+#endif
+
+#ifdef HAVE_TERMIO
+ return ioctl (scb->fd, TCSBRK, 1);
+#endif
+
+#ifdef HAVE_SGTTY
+ /* Get the current state and then restore it using TIOCSETP,
+ which should cause the output to drain and pending input
+ to be discarded. */
+ {
+ struct hardwire_ttystate state;
+ if (get_tty_state (scb, &state))
+ {
+ return (-1);
+ }
+ else
+ {
+ return (ioctl (scb->fd, TIOCSETP, &state.sgttyb));
+ }
+ }
+#endif
+}
+
+static int
+hardwire_flush_output (scb)
+ serial_t scb;
+{
+#ifdef HAVE_TERMIOS
+ return tcflush (scb->fd, TCOFLUSH);
+#endif
+
+#ifdef HAVE_TERMIO
+ return ioctl (scb->fd, TCFLSH, 1);
+#endif
+
+#ifdef HAVE_SGTTY
+ /* This flushes both input and output, but we can't do better. */
+ return ioctl (scb->fd, TIOCFLUSH, 0);
+#endif
+}
+
+static int
+hardwire_flush_input (scb)
+ serial_t scb;
+{
+ scb->bufcnt = 0;
+ scb->bufp = scb->buf;
+
+#ifdef HAVE_TERMIOS
+ return tcflush (scb->fd, TCIFLUSH);
+#endif
+
+#ifdef HAVE_TERMIO
+ return ioctl (scb->fd, TCFLSH, 0);
+#endif
+
+#ifdef HAVE_SGTTY
+ /* This flushes both input and output, but we can't do better. */
+ return ioctl (scb->fd, TIOCFLUSH, 0);
+#endif
+}
+
+static int
+hardwire_send_break (scb)
+ serial_t scb;
+{
+#ifdef HAVE_TERMIOS
+ return tcsendbreak (scb->fd, 0);
+#endif
+
+#ifdef HAVE_TERMIO
+ return ioctl (scb->fd, TCSBRK, 0);
+#endif
+
+#ifdef HAVE_SGTTY
+ {
+ int status;
+ struct timeval timeout;
+
+ status = ioctl (scb->fd, TIOCSBRK, 0);
+
+ /* Can't use usleep; it doesn't exist in BSD 4.2. */
+ /* Note that if this select() is interrupted by a signal it will not wait
+ the full length of time. I think that is OK. */
+ timeout.tv_sec = 0;
+ timeout.tv_usec = 250000;
+ select (0, 0, 0, 0, &timeout);
+ status = ioctl (scb->fd, TIOCCBRK, 0);
+ return status;
+ }
+#endif
+}
+
+static void
+hardwire_raw(scb)
+ serial_t scb;
+{
+ 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
+ state.termios.c_iflag = 0;
+ state.termios.c_oflag = 0;
+ state.termios.c_lflag = 0;
+ state.termios.c_cflag &= ~(CSIZE|PARENB);
+ state.termios.c_cflag |= CLOCAL | CS8;
+ state.termios.c_cc[VMIN] = 0;
+ state.termios.c_cc[VTIME] = 0;
+#endif
+
+#ifdef HAVE_TERMIO
+ state.termio.c_iflag = 0;
+ state.termio.c_oflag = 0;
+ state.termio.c_lflag = 0;
+ state.termio.c_cflag &= ~(CSIZE|PARENB);
+ state.termio.c_cflag |= CLOCAL | CS8;
+ state.termio.c_cc[VMIN] = 0;
+ state.termio.c_cc[VTIME] = 0;
+#endif
+
+#ifdef HAVE_SGTTY
+ state.sgttyb.sg_flags |= RAW | ANYP;
+ 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", 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().
+ */
+
+static int
+wait_for(scb, timeout)
+ serial_t scb;
+ int timeout;
+{
+#ifndef __CYGWIN32__
+ scb->timeout_remaining = 0;
+#endif
+
+#ifdef HAVE_SGTTY
+ {
+ struct timeval tv;
+ fd_set readfds;
+
+ FD_ZERO (&readfds);
+
+ tv.tv_sec = timeout;
+ tv.tv_usec = 0;
+
+ FD_SET(scb->fd, &readfds);
+
+ while (1)
+ {
+ int numfds;
+
+ if (timeout >= 0)
+ numfds = select(scb->fd+1, &readfds, 0, 0, &tv);
+ else
+ numfds = 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). */
+static int
+hardwire_readchar (scb, timeout)
+ serial_t scb;
+ int timeout;
+{
+ int status;
+#ifdef __CYGWIN32__
+ int t;
+#endif
+
+ if (scb->bufcnt-- > 0)
+ return *scb->bufp++;
+
+#ifdef __CYGWIN32__
+ if (timeout > 0)
+ timeout++;
+#endif
+
+ while (1)
+ {
+#ifdef __CYGWIN32__
+ t = timeout == 0 ? 0 : 1;
+ scb->timeout_remaining = timeout < 0 ? timeout : timeout - t;
+ status = wait_for (scb, t);
+
+ /* -2 means disable timer */
+ if (ui_loop_hook)
+ ui_loop_hook (-2);
+#else
+ status = wait_for (scb, timeout);
+#endif
+ if (status < 0)
+ return status;
+
+ scb->bufcnt = read (scb->fd, scb->buf, BUFSIZ);
+
+ if (scb->bufcnt <= 0)
+ {
+ if (scb->bufcnt == 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;
+ }
+#ifdef __CYGWIN32__
+ else if (scb->timeout_remaining < 0)
+ continue;
+#endif
+ else
+ return SERIAL_TIMEOUT;
+ }
+ else if (errno == EINTR)
+ continue;
+ else
+ return SERIAL_ERROR; /* Got an error from read */
+ }
+
+ scb->bufcnt--;
+ scb->bufp = scb->buf;
+ return *scb->bufp++;
+ }
+}
+
+#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(rate)
+ int rate;
+{
+ int i;
+
+ for (i = 0; baudtab[i].rate != -1; i++)
+ if (rate == baudtab[i].rate)
+ return baudtab[i].code;
+
+ return -1;
+}
+
+static int
+hardwire_setbaudrate(scb, rate)
+ serial_t scb;
+ int rate;
+{
+ struct hardwire_ttystate state;
+
+ if (get_tty_state(scb, &state))
+ return -1;
+
+#ifdef HAVE_TERMIOS
+ cfsetospeed (&state.termios, rate_to_code (rate));
+ cfsetispeed (&state.termios, rate_to_code (rate));
+#endif
+
+#ifdef HAVE_TERMIO
+#ifndef CIBAUD
+#define CIBAUD CBAUD
+#endif
+
+ state.termio.c_cflag &= ~(CBAUD | CIBAUD);
+ state.termio.c_cflag |= rate_to_code (rate);
+#endif
+
+#ifdef HAVE_SGTTY
+ state.sgttyb.sg_ispeed = rate_to_code (rate);
+ state.sgttyb.sg_ospeed = rate_to_code (rate);
+#endif
+
+ return set_tty_state (scb, &state);
+}
+
+static int
+hardwire_setstopbits(scb, num)
+ serial_t 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 int
+hardwire_write(scb, str, len)
+ serial_t scb;
+ const char *str;
+ int len;
+{
+ int cc;
+
+ while (len > 0)
+ {
+ cc = write(scb->fd, str, len);
+
+ if (cc < 0)
+ return 1;
+ len -= cc;
+ str += cc;
+ }
+ return 0;
+}
+
+static void
+hardwire_close(scb)
+ serial_t scb;
+{
+ if (scb->fd < 0)
+ return;
+
+ close(scb->fd);
+ scb->fd = -1;
+}
+
+static struct serial_ops hardwire_ops =
+{
+ "hardwire",
+ 0,
+ hardwire_open,
+ hardwire_close,
+ hardwire_readchar,
+ hardwire_write,
+ hardwire_flush_output,
+ hardwire_flush_input,
+ hardwire_send_break,
+ hardwire_raw,
+ hardwire_get_tty_state,
+ hardwire_set_tty_state,
+ hardwire_print_tty_state,
+ hardwire_noflush_set_tty_state,
+ hardwire_setbaudrate,
+ hardwire_setstopbits,
+ hardwire_drain_output, /* wait for output to drain */
+};
+
+void
+_initialize_ser_hardwire ()
+{
+ serial_add_interface (&hardwire_ops);
+}
generated by cgit v1.1 at 2024-11-04 14:54:27 +0000