X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=gdb%2Fser-unix.c;h=0a1c53e872fa771b78a288f45cda74cdae3a422a;hb=a9762ec78a53fbe9209fe1654db42df0cd328d50;hp=9b67230a07ab8f80bb235ed5248244c8e0910db6;hpb=d4c22c52330c6dd6ba3a1f723a19786a16102c83;p=binutils-gdb.git
diff --git a/gdb/ser-unix.c b/gdb/ser-unix.c
index 9b67230a07a..0a1c53e872f 100644
--- a/gdb/ser-unix.c
+++ b/gdb/ser-unix.c
@@ -1,44 +1,59 @@
/* 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, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2003,
+ 2004, 2005, 2007 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 . */
#include "defs.h"
#include "serial.h"
+#include "ser-base.h"
+#include "ser-unix.h"
+
#include
#include
+#include "terminal.h"
+#include
+#include
-#if !defined (HAVE_TERMIOS) && !defined (HAVE_TERMIO) && !defined (HAVE_SGTTY)
-#define HAVE_SGTTY
-#endif
+#include "gdb_select.h"
+#include "gdb_string.h"
+#include "gdbcmd.h"
#ifdef HAVE_TERMIOS
-#include
-#include
struct hardwire_ttystate
+ {
+ struct termios termios;
+ };
+
+#ifdef CRTSCTS
+/* Boolean to explicitly enable or disable h/w flow control. */
+static int serial_hwflow;
+static void
+show_serial_hwflow (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
{
- struct termios termios;
- pid_t process_group;
-};
+ fprintf_filtered (file, _("Hardware flow control is %s.\n"), value);
+}
+#endif
+
#endif /* termios */
#ifdef HAVE_TERMIO
-#include
/* 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
@@ -46,55 +61,52 @@ struct hardwire_ttystate
bewildering. So we don't attempt it. */
struct hardwire_ttystate
-{
- struct termio termio;
-};
+ {
+ struct termio termio;
+ };
#endif /* termio */
#ifdef HAVE_SGTTY
-/* Needed for the code which uses select(). We would include
- too if it existed on all systems. */
-#include
-
-#include
-
struct hardwire_ttystate
-{
- struct sgttyb sgttyb;
- struct tchars tc;
- struct ltchars ltc;
- /* Line discipline flags. */
- int lmode;
-
-#ifdef SHORT_PGRP
- /* This is only used for the ultra. Does it have pid_t? */
- short process_group;
-#else
- int process_group;
-#endif
-};
+ {
+ 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_restore PARAMS ((serial_t scb));
-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_open (struct serial *scb, const char *name);
+static void hardwire_raw (struct serial *scb);
+static int wait_for (struct serial *scb, int timeout);
+static int hardwire_readchar (struct serial *scb, int timeout);
+static int do_hardwire_readchar (struct serial *scb, int timeout);
+static int rate_to_code (int rate);
+static int hardwire_setbaudrate (struct serial *scb, int rate);
+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 int hardwire_noflush_set_tty_state (struct serial *, serial_ttystate,
+ serial_ttystate);
+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);
+
+void _initialize_ser_hardwire (void);
/* 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);
if (scb->fd < 0)
@@ -104,23 +116,12 @@ hardwire_open(scb, name)
}
static int
-get_tty_state(scb, state)
- serial_t scb;
- struct hardwire_ttystate *state;
+get_tty_state (struct serial *scb, struct hardwire_ttystate *state)
{
#ifdef HAVE_TERMIOS
- pid_t new_process_group;
-
- if (tcgetattr(scb->fd, &state->termios) < 0)
+ if (tcgetattr (scb->fd, &state->termios) < 0)
return -1;
- if (!job_control)
- return 0;
-
- new_process_group = tcgetpgrp (scb->fd);
- if (new_process_group == (pid_t)-1)
- return -1;
- state->process_group = new_process_group;
return 0;
#endif
@@ -140,26 +141,18 @@ get_tty_state(scb, state)
if (ioctl (scb->fd, TIOCLGET, &state->lmode) < 0)
return -1;
- if (!job_control)
- return 0;
-
- return ioctl (scb->fd, TIOCGPGRP, &state->process_group);
+ return 0;
#endif
}
static int
-set_tty_state(scb, state)
- serial_t scb;
- struct hardwire_ttystate *state;
+set_tty_state (struct serial *scb, struct hardwire_ttystate *state)
{
#ifdef HAVE_TERMIOS
- if (tcsetattr(scb->fd, TCSANOW, &state->termios) < 0)
+ if (tcsetattr (scb->fd, TCSANOW, &state->termios) < 0)
return -1;
- if (!job_control)
- return 0;
-
- return tcsetpgrp (scb->fd, state->process_group);
+ return 0;
#endif
#ifdef HAVE_TERMIO
@@ -171,68 +164,55 @@ set_tty_state(scb, state)
#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;
- if (!job_control)
- return 0;
-
- return ioctl (scb->fd, TIOCSPGRP, &state->process_group);
+ return 0;
#endif
}
static serial_ttystate
-hardwire_get_tty_state(scb)
- serial_t scb;
+hardwire_get_tty_state (struct serial *scb)
{
struct hardwire_ttystate *state;
- state = (struct hardwire_ttystate *)xmalloc(sizeof *state);
+ state = (struct hardwire_ttystate *) xmalloc (sizeof *state);
- if (get_tty_state(scb, state))
+ if (get_tty_state (scb, state))
return NULL;
- return (serial_ttystate)state;
+ return (serial_ttystate) state;
}
static int
-hardwire_set_tty_state(scb, ttystate)
- serial_t scb;
- serial_ttystate ttystate;
+hardwire_set_tty_state (struct serial *scb, serial_ttystate ttystate)
{
struct hardwire_ttystate *state;
- state = (struct hardwire_ttystate *)ttystate;
+ state = (struct hardwire_ttystate *) ttystate;
- return set_tty_state(scb, state);
+ 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;
+hardwire_noflush_set_tty_state (struct serial *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;
-
- new_state = *(struct hardwire_ttystate *)new_ttystate;
-
-#ifdef HAVE_TERMIOS
- /* I'm not sure whether this is necessary; the manpage makes no mention
- of discarding input when switching to/from ICANON. */
- if (state->termios.c_lflag & ICANON)
- new_state.termios.c_lflag |= ICANON;
- else
- new_state.termios.c_lflag &= ~ICANON;
#endif
-#ifdef HAVE_TERMIO
- /* I'm not sure whether this is necessary; the manpage makes no mention
- of discarding input when switching to/from ICANON. */
- if (state->termio.c_lflag & ICANON)
- new_state.termio.c_lflag |= ICANON;
- else
- new_state.termio.c_lflag &= ~ICANON;
-#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)
@@ -252,65 +232,94 @@ hardwire_noflush_set_tty_state (scb, new_ttystate, old_ttystate)
}
static void
-hardwire_print_tty_state (scb, ttystate)
- serial_t scb;
- serial_ttystate ttystate;
+hardwire_print_tty_state (struct serial *scb,
+ serial_ttystate ttystate,
+ struct ui_file *stream)
{
struct hardwire_ttystate *state = (struct hardwire_ttystate *) ttystate;
int i;
#ifdef HAVE_TERMIOS
- printf_filtered ("Process group = %d\n", state->process_group);
-
- 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);
+ 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). */
- printf_filtered ("c_line = 0x%x.\n", state->termios.c_line);
+ fprintf_filtered (stream, "c_line = 0x%x.\n", state->termios.c_line);
#endif
- printf_filtered ("c_cc: ");
+ fprintf_filtered (stream, "c_cc: ");
for (i = 0; i < NCCS; i += 1)
- printf_filtered ("0x%x ", state->termios.c_cc[i]);
- printf_filtered ("\n");
+ fprintf_filtered (stream, "0x%x ", state->termios.c_cc[i]);
+ fprintf_filtered (stream, "\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: ");
+ fprintf_filtered (stream, "c_iflag = 0x%x, c_oflag = 0x%x,\n",
+ state->termio.c_iflag, state->termio.c_oflag);
+ fprintf_filtered (stream, "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);
+ fprintf_filtered (stream, "c_cc: ");
for (i = 0; i < NCC; i += 1)
- printf_filtered ("0x%x ", state->termio.c_cc[i]);
- printf_filtered ("\n");
+ fprintf_filtered (stream, "0x%x ", state->termio.c_cc[i]);
+ fprintf_filtered (stream, "\n");
#endif
#ifdef HAVE_SGTTY
- printf_filtered ("Process group = %d\n", state->process_group);
+ fprintf_filtered (stream, "sgttyb.sg_flags = 0x%x.\n",
+ state->sgttyb.sg_flags);
+
+ fprintf_filtered (stream, "tchars: ");
+ for (i = 0; i < (int) sizeof (struct tchars); i++)
+ fprintf_filtered (stream, "0x%x ", ((unsigned char *) &state->tc)[i]);
+ fprintf_filtered (stream, "\n");
+
+ fprintf_filtered (stream, "ltchars: ");
+ for (i = 0; i < (int) sizeof (struct ltchars); i++)
+ fprintf_filtered (stream, "0x%x ", ((unsigned char *) &state->ltc)[i]);
+ fprintf_filtered (stream, "\n");
+
+ fprintf_filtered (stream, "lmode: 0x%x\n", state->lmode);
+#endif
+}
- printf_filtered ("sgttyb.sg_flags = 0x%x.\n", state->sgttyb.sg_flags);
+/* Wait for the output to drain away, as opposed to flushing (discarding) it */
- printf_filtered ("tchars: ");
- for (i = 0; i < (int)sizeof (struct tchars); i++)
- printf_filtered ("0x%x ", ((unsigned char *)&state->tc)[i]);
- printf_filtered ("\n");
+static int
+hardwire_drain_output (struct serial *scb)
+{
+#ifdef HAVE_TERMIOS
+ return tcdrain (scb->fd);
+#endif
- printf_filtered ("ltchars: ");
- for (i = 0; i < (int)sizeof (struct ltchars); i++)
- printf_filtered ("0x%x ", ((unsigned char *)&state->ltc)[i]);
- printf_filtered ("\n");
+#ifdef HAVE_TERMIO
+ return ioctl (scb->fd, TCSBRK, 1);
+#endif
- printf_filtered ("lmode: 0x%x\n", state->lmode);
+#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;
+hardwire_flush_output (struct serial *scb)
{
#ifdef HAVE_TERMIOS
return tcflush (scb->fd, TCOFLUSH);
@@ -323,13 +332,14 @@ hardwire_flush_output (scb)
#ifdef HAVE_SGTTY
/* This flushes both input and output, but we can't do better. */
return ioctl (scb->fd, TIOCFLUSH, 0);
-#endif
+#endif
}
static int
-hardwire_flush_input (scb)
- serial_t scb;
+hardwire_flush_input (struct serial *scb)
{
+ ser_base_flush_input (scb);
+
#ifdef HAVE_TERMIOS
return tcflush (scb->fd, TCIFLUSH);
#endif
@@ -341,15 +351,12 @@ hardwire_flush_input (scb)
#ifdef HAVE_SGTTY
/* This flushes both input and output, but we can't do better. */
return ioctl (scb->fd, TIOCFLUSH, 0);
-#endif
+#endif
}
static int
-hardwire_send_break (scb)
- serial_t scb;
+hardwire_send_break (struct serial *scb)
{
- int status;
-
#ifdef HAVE_TERMIOS
return tcsendbreak (scb->fd, 0);
#endif
@@ -359,28 +366,51 @@ hardwire_send_break (scb)
#endif
#ifdef HAVE_SGTTY
- status = ioctl (scb->fd, TIOCSBRK, 0);
- usleep (250000);
- status = ioctl (scb->fd, TIOCCBRK, 0);
- return status;
-#endif
+ {
+ 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;
+ gdb_select (0, 0, 0, 0, &timeout);
+ status = ioctl (scb->fd, TIOCCBRK, 0);
+ return status;
+ }
+#endif
}
static void
-hardwire_raw(scb)
- serial_t scb;
+hardwire_raw (struct serial *scb)
{
struct hardwire_ttystate state;
- if (get_tty_state(scb, &state))
- fprintf(stderr, "get_tty_state failed: %s\n", safe_strerror(errno));
+ 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 |= CS8;
+ state.termios.c_cflag &= ~(CSIZE | PARENB);
+ 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;
#endif
@@ -389,8 +419,8 @@ hardwire_raw(scb)
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 |= CS8;
+ 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
@@ -403,7 +433,7 @@ hardwire_raw(scb)
scb->current_timeout = 0;
if (set_tty_state (scb, &state))
- fprintf(stderr, "set_tty_state failed: %s\n", safe_strerror(errno));
+ 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,
@@ -413,30 +443,39 @@ hardwire_raw(scb)
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
+ 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(scb, timeout)
- serial_t scb;
- int timeout;
+wait_for (struct serial *scb, int timeout)
{
- int numfds;
-
#ifdef HAVE_SGTTY
- struct timeval tv;
- fd_set readfds;
+ while (1)
+ {
+ struct timeval tv;
+ fd_set readfds;
+ int numfds;
- FD_ZERO (&readfds);
+ /* 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;
+ tv.tv_sec = timeout;
+ tv.tv_usec = 0;
- FD_SET(scb->fd, &readfds);
+ FD_ZERO (&readfds);
+ FD_SET (scb->fd, &readfds);
- while (1)
- {
if (timeout >= 0)
- numfds = select(scb->fd+1, &readfds, 0, 0, &tv);
+ numfds = gdb_select (scb->fd + 1, &readfds, 0, 0, &tv);
else
- numfds = select(scb->fd+1, &readfds, 0, 0, 0);
+ numfds = gdb_select (scb->fd + 1, &readfds, 0, 0, 0);
if (numfds <= 0)
if (numfds == 0)
@@ -448,72 +487,169 @@ wait_for(scb, timeout)
return 0;
}
-
-#endif /* HAVE_SGTTY */
+#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(stderr, "get_tty_state failed: %s\n", safe_strerror(errno));
+ 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_cc[VTIME] = timeout * 10;
+ 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
- state.termio.c_cc[VTIME] = timeout * 10;
+ 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
- scb->current_timeout = timeout;
-
if (set_tty_state (scb, &state))
- fprintf(stderr, "set_tty_state failed: %s\n", safe_strerror(errno));
+ fprintf_unfiltered (gdb_stderr, "set_tty_state failed: %s\n", safe_strerror (errno));
return 0;
}
-#endif /* HAVE_TERMIO || HAVE_TERMIOS */
+#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 -2 if timeout expired, EOF if line dropped
- dead, or -3 for any other error (see errno in that case). */
+ 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
-hardwire_readchar(scb, timeout)
- serial_t scb;
- int timeout;
+do_hardwire_readchar (struct serial *scb, int timeout)
{
- int status;
+ int status, delta;
+ int detach = 0;
- if (scb->bufcnt-- > 0)
- return *scb->bufp++;
+ if (timeout > 0)
+ timeout++;
- status = wait_for(scb, 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.
- if (status < 0)
- return status;
+ Also, timeout = 0 means to poll, so we just set the delta to 0,
+ so we will only go through the loop once. */
- scb->bufcnt = read(scb->fd, scb->buf, BUFSIZ);
+ delta = (timeout == 0 ? 0 : 1);
+ while (1)
+ {
- if (scb->bufcnt <= 0)
- if (scb->bufcnt == 0)
- return SERIAL_TIMEOUT; /* 0 chars means timeout [may need to
- distinguish between EOF & timeouts
- someday] */
- else
- return SERIAL_ERROR; /* Got an error from read */
+ /* 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++;
+ }
+}
- 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
@@ -532,50 +668,152 @@ static struct
}
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)
{
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))
+ 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));
+ cfsetospeed (&state.termios, baud_code);
+ cfsetispeed (&state.termios, baud_code);
#endif
#ifdef HAVE_TERMIO
@@ -584,148 +822,134 @@ hardwire_setbaudrate(scb, rate)
#endif
state.termio.c_cflag &= ~(CBAUD | CIBAUD);
- state.termio.c_cflag |= rate_to_code (rate);
+ state.termio.c_cflag |= baud_code;
#endif
#ifdef HAVE_SGTTY
- state.sgttyb.sg_ispeed = rate_to_code (rate);
- state.sgttyb.sg_ospeed = rate_to_code (rate);
+ state.sgttyb.sg_ispeed = baud_code;
+ state.sgttyb.sg_ospeed = baud_code;
#endif
return set_tty_state (scb, &state);
}
static int
-hardwire_set_process_group (scb, ttystate, group)
- serial_t scb;
- serial_ttystate ttystate;
- int group;
+hardwire_setstopbits (struct serial *scb, int num)
{
-#if defined (HAVE_SGTTY) || defined (HAVE_TERMIOS)
- ((struct hardwire_ttystate *)ttystate)->process_group = group;
-#endif
- return 0;
-}
+ struct hardwire_ttystate state;
+ int newbit;
-static int
-hardwire_write(scb, str, len)
- serial_t scb;
- const char *str;
- int len;
-{
- int cc;
+ if (get_tty_state (scb, &state))
+ return -1;
- while (len > 0)
+ switch (num)
{
- cc = write(scb->fd, str, len);
-
- if (cc < 0)
- return 1;
- len -= cc;
- str += cc;
+ case SERIAL_1_STOPBITS:
+ newbit = 0;
+ break;
+ case SERIAL_1_AND_A_HALF_STOPBITS:
+ case SERIAL_2_STOPBITS:
+ newbit = 1;
+ break;
+ default:
+ return 1;
}
- return 0;
+
+#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(scb)
- serial_t scb;
+hardwire_close (struct serial *scb)
{
if (scb->fd < 0)
return;
- close(scb->fd);
+ close (scb->fd);
scb->fd = -1;
}
-
-static struct serial_ops hardwire_ops =
+
+
+void
+_initialize_ser_hardwire (void)
{
- "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_set_process_group
-};
+ 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->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);
-int job_control;
-#if defined (HAVE_TERMIOS)
-#include
+#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
+}
-/* This is here because this is where we figure out whether we (probably)
- have job control. Just using job_control only does part of it because
- setpgid or setpgrp might not exist on a system without job control.
- It might be considered misplaced (on the other hand, process groups and
- job control are closely related to ttys).
-
- For a more clean implementation, in libiberty, put a setpgid which merely
- calls setpgrp and a setpgrp which does nothing (any system with job control
- will have one or the other). */
int
-gdb_setpgid ()
+ser_unix_read_prim (struct serial *scb, size_t count)
{
- int retval = 0;
- if (job_control)
+ int status;
+
+ while (1)
{
-#if defined (NEED_POSIX_SETPGID) || defined (HAVE_TERMIOS)
- /* Do all systems with termios have setpgid? I hope so. */
- /* setpgid (0, 0) is supposed to work and mean the same thing as
- this, but on Ultrix 4.2A it fails with EPERM (and
- setpgid (getpid (), getpid ()) succeeds). */
- retval = setpgid (getpid (), getpid ());
-#else
-#if defined (TIOCGPGRP)
-#if defined(USG) && !defined(SETPGRP_ARGS)
- retval = setpgrp ();
-#else
- retval = setpgrp (getpid (), getpid ());
-#endif /* USG */
-#endif /* TIOCGPGRP. */
-#endif /* NEED_POSIX_SETPGID */
+ status = read (scb->fd, scb->buf, count);
+ if (status != -1 || errno != EINTR)
+ break;
}
- return retval;
+ return status;
}
-void
-_initialize_ser_hardwire ()
+int
+ser_unix_write_prim (struct serial *scb, const void *buf, size_t len)
{
- serial_add_interface (&hardwire_ops);
-
- /* OK, figure out whether we have job control. */
-
-#if defined (HAVE_TERMIOS)
- /* Do all systems with termios have the POSIX way of identifying job
- control? I hope so. */
-#ifdef _POSIX_JOB_CONTROL
- job_control = 1;
-#else
- job_control = sysconf (_SC_JOB_CONTROL);
-#endif
-#endif /* termios */
-
-#ifdef HAVE_TERMIO
- /* See comment at top of file about trying to support process groups
- with termio. */
- job_control = 0;
-#endif /* termio */
-
-#ifdef HAVE_SGTTY
-#ifdef TIOCGPGRP
- job_control = 1;
-#else
- job_control = 0;
-#endif /* TIOCGPGRP */
-#endif /* sgtty */
-
+ /* ??? Historically, GDB has not retried calls to "write" that
+ result in EINTR. */
+ return write (scb->fd, buf, len);
}