mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 04:52:05 +08:00
213516ef31
This commit is the result of running the gdb/copyright.py script, which automated the update of the copyright year range for all source files managed by the GDB project to be updated to include year 2023.
530 lines
11 KiB
C
530 lines
11 KiB
C
/* Serial interface for local (hardwired) serial ports on Un*x like systems
|
||
|
||
Copyright (C) 1992-2023 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 3 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, see <http://www.gnu.org/licenses/>. */
|
||
|
||
#include "defs.h"
|
||
#include "serial.h"
|
||
#include "ser-base.h"
|
||
#include "ser-unix.h"
|
||
|
||
#include <fcntl.h>
|
||
#include <sys/types.h>
|
||
#include "terminal.h"
|
||
#include <sys/socket.h>
|
||
#include "gdbsupport/gdb_sys_time.h"
|
||
|
||
#include "gdbsupport/gdb_select.h"
|
||
#include "gdbcmd.h"
|
||
#include "gdbsupport/filestuff.h"
|
||
#include <termios.h>
|
||
#include "gdbsupport/scoped_ignore_sigttou.h"
|
||
|
||
struct hardwire_ttystate
|
||
{
|
||
struct termios termios;
|
||
};
|
||
|
||
#ifdef CRTSCTS
|
||
/* Boolean to explicitly enable or disable h/w flow control. */
|
||
static bool serial_hwflow;
|
||
static void
|
||
show_serial_hwflow (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
gdb_printf (file, _("Hardware flow control is %s.\n"), value);
|
||
}
|
||
#endif
|
||
|
||
static int hardwire_open (struct serial *scb, const char *name);
|
||
static void hardwire_raw (struct serial *scb);
|
||
static int rate_to_code (int rate);
|
||
static int hardwire_setbaudrate (struct serial *scb, int rate);
|
||
static int hardwire_setparity (struct serial *scb, int parity);
|
||
static void hardwire_close (struct serial *scb);
|
||
static int get_tty_state (struct serial *scb,
|
||
struct hardwire_ttystate * state);
|
||
static int set_tty_state (struct serial *scb,
|
||
struct hardwire_ttystate * state);
|
||
static serial_ttystate hardwire_get_tty_state (struct serial *scb);
|
||
static int hardwire_set_tty_state (struct serial *scb, serial_ttystate state);
|
||
static void hardwire_print_tty_state (struct serial *, serial_ttystate,
|
||
struct ui_file *);
|
||
static int hardwire_drain_output (struct serial *);
|
||
static int hardwire_flush_output (struct serial *);
|
||
static int hardwire_flush_input (struct serial *);
|
||
static int hardwire_send_break (struct serial *);
|
||
static int hardwire_setstopbits (struct serial *, int);
|
||
|
||
/* Open up a real live device for serial I/O. */
|
||
|
||
static int
|
||
hardwire_open (struct serial *scb, const char *name)
|
||
{
|
||
scb->fd = gdb_open_cloexec (name, O_RDWR, 0).release ();
|
||
if (scb->fd < 0)
|
||
return -1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
get_tty_state (struct serial *scb, struct hardwire_ttystate *state)
|
||
{
|
||
if (tcgetattr (scb->fd, &state->termios) < 0)
|
||
return -1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
set_tty_state (struct serial *scb, struct hardwire_ttystate *state)
|
||
{
|
||
if (tcsetattr (scb->fd, TCSANOW, &state->termios) < 0)
|
||
return -1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static serial_ttystate
|
||
hardwire_get_tty_state (struct serial *scb)
|
||
{
|
||
struct hardwire_ttystate *state = XNEW (struct hardwire_ttystate);
|
||
|
||
if (get_tty_state (scb, state))
|
||
{
|
||
xfree (state);
|
||
return NULL;
|
||
}
|
||
|
||
return (serial_ttystate) state;
|
||
}
|
||
|
||
static serial_ttystate
|
||
hardwire_copy_tty_state (struct serial *scb, serial_ttystate ttystate)
|
||
{
|
||
struct hardwire_ttystate *state = XNEW (struct hardwire_ttystate);
|
||
|
||
*state = *(struct hardwire_ttystate *) ttystate;
|
||
|
||
return (serial_ttystate) state;
|
||
}
|
||
|
||
static int
|
||
hardwire_set_tty_state (struct serial *scb, serial_ttystate ttystate)
|
||
{
|
||
struct hardwire_ttystate *state;
|
||
|
||
state = (struct hardwire_ttystate *) ttystate;
|
||
|
||
return set_tty_state (scb, state);
|
||
}
|
||
|
||
static void
|
||
hardwire_print_tty_state (struct serial *scb,
|
||
serial_ttystate ttystate,
|
||
struct ui_file *stream)
|
||
{
|
||
struct hardwire_ttystate *state = (struct hardwire_ttystate *) ttystate;
|
||
int i;
|
||
|
||
gdb_printf (stream, "c_iflag = 0x%x, c_oflag = 0x%x,\n",
|
||
(int) state->termios.c_iflag,
|
||
(int) state->termios.c_oflag);
|
||
gdb_printf (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). */
|
||
gdb_printf (stream, "c_line = 0x%x.\n", state->termios.c_line);
|
||
#endif
|
||
gdb_printf (stream, "c_cc: ");
|
||
for (i = 0; i < NCCS; i += 1)
|
||
gdb_printf (stream, "0x%x ", state->termios.c_cc[i]);
|
||
gdb_printf (stream, "\n");
|
||
}
|
||
|
||
/* Wait for the output to drain away, as opposed to flushing
|
||
(discarding) it. */
|
||
|
||
static int
|
||
hardwire_drain_output (struct serial *scb)
|
||
{
|
||
/* Ignore SIGTTOU which may occur during the drain. */
|
||
scoped_ignore_sigttou ignore_sigttou;
|
||
|
||
return tcdrain (scb->fd);
|
||
}
|
||
|
||
static int
|
||
hardwire_flush_output (struct serial *scb)
|
||
{
|
||
return tcflush (scb->fd, TCOFLUSH);
|
||
}
|
||
|
||
static int
|
||
hardwire_flush_input (struct serial *scb)
|
||
{
|
||
ser_base_flush_input (scb);
|
||
|
||
return tcflush (scb->fd, TCIFLUSH);
|
||
}
|
||
|
||
static int
|
||
hardwire_send_break (struct serial *scb)
|
||
{
|
||
return tcsendbreak (scb->fd, 0);
|
||
}
|
||
|
||
static void
|
||
hardwire_raw (struct serial *scb)
|
||
{
|
||
struct hardwire_ttystate state;
|
||
|
||
if (get_tty_state (scb, &state))
|
||
gdb_printf (gdb_stderr, "get_tty_state failed: %s\n",
|
||
safe_strerror (errno));
|
||
|
||
state.termios.c_iflag = 0;
|
||
state.termios.c_oflag = 0;
|
||
state.termios.c_lflag = 0;
|
||
state.termios.c_cflag &= ~CSIZE;
|
||
state.termios.c_cflag |= CLOCAL | CS8;
|
||
#ifdef CRTSCTS
|
||
/* h/w flow control. */
|
||
if (serial_hwflow)
|
||
state.termios.c_cflag |= CRTSCTS;
|
||
else
|
||
state.termios.c_cflag &= ~CRTSCTS;
|
||
#ifdef CRTS_IFLOW
|
||
if (serial_hwflow)
|
||
state.termios.c_cflag |= CRTS_IFLOW;
|
||
else
|
||
state.termios.c_cflag &= ~CRTS_IFLOW;
|
||
#endif
|
||
#endif
|
||
state.termios.c_cc[VMIN] = 0;
|
||
state.termios.c_cc[VTIME] = 0;
|
||
|
||
if (set_tty_state (scb, &state))
|
||
gdb_printf (gdb_stderr, "set_tty_state failed: %s\n",
|
||
safe_strerror (errno));
|
||
}
|
||
|
||
#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;
|
||
|
||
cfsetospeed (&state.termios, baud_code);
|
||
cfsetispeed (&state.termios, baud_code);
|
||
|
||
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;
|
||
}
|
||
|
||
if (!newbit)
|
||
state.termios.c_cflag &= ~CSTOPB;
|
||
else
|
||
state.termios.c_cflag |= CSTOPB; /* two bits */
|
||
|
||
return set_tty_state (scb, &state);
|
||
}
|
||
|
||
/* Implement the "setparity" serial_ops callback. */
|
||
|
||
static int
|
||
hardwire_setparity (struct serial *scb, int parity)
|
||
{
|
||
struct hardwire_ttystate state;
|
||
int newparity = 0;
|
||
|
||
if (get_tty_state (scb, &state))
|
||
return -1;
|
||
|
||
switch (parity)
|
||
{
|
||
case GDBPARITY_NONE:
|
||
newparity = 0;
|
||
break;
|
||
case GDBPARITY_ODD:
|
||
newparity = PARENB | PARODD;
|
||
break;
|
||
case GDBPARITY_EVEN:
|
||
newparity = PARENB;
|
||
break;
|
||
default:
|
||
internal_warning ("Incorrect parity value: %d", parity);
|
||
return -1;
|
||
}
|
||
|
||
state.termios.c_cflag &= ~(PARENB | PARODD);
|
||
state.termios.c_cflag |= newparity;
|
||
|
||
return set_tty_state (scb, &state);
|
||
}
|
||
|
||
|
||
static void
|
||
hardwire_close (struct serial *scb)
|
||
{
|
||
if (scb->fd < 0)
|
||
return;
|
||
|
||
close (scb->fd);
|
||
scb->fd = -1;
|
||
}
|
||
|
||
|
||
|
||
/* The hardwire ops. */
|
||
|
||
static const struct serial_ops hardwire_ops =
|
||
{
|
||
"hardwire",
|
||
hardwire_open,
|
||
hardwire_close,
|
||
NULL,
|
||
ser_base_readchar,
|
||
ser_base_write,
|
||
hardwire_flush_output,
|
||
hardwire_flush_input,
|
||
hardwire_send_break,
|
||
hardwire_raw,
|
||
hardwire_get_tty_state,
|
||
hardwire_copy_tty_state,
|
||
hardwire_set_tty_state,
|
||
hardwire_print_tty_state,
|
||
hardwire_setbaudrate,
|
||
hardwire_setstopbits,
|
||
hardwire_setparity,
|
||
hardwire_drain_output,
|
||
ser_base_async,
|
||
ser_unix_read_prim,
|
||
ser_unix_write_prim
|
||
};
|
||
|
||
void _initialize_ser_hardwire ();
|
||
void
|
||
_initialize_ser_hardwire ()
|
||
{
|
||
serial_add_interface (&hardwire_ops);
|
||
|
||
#ifdef CRTSCTS
|
||
add_setshow_boolean_cmd ("remoteflow", no_class,
|
||
&serial_hwflow, _("\
|
||
Set use of hardware flow control for remote serial I/O."), _("\
|
||
Show use of hardware flow control for remote serial I/O."), _("\
|
||
Enable or disable hardware flow control (RTS/CTS) on the serial port\n\
|
||
when debugging using remote targets."),
|
||
NULL,
|
||
show_serial_hwflow,
|
||
&setlist, &showlist);
|
||
#endif
|
||
}
|
||
|
||
int
|
||
ser_unix_read_prim (struct serial *scb, size_t count)
|
||
{
|
||
return read (scb->fd, scb->buf, count);
|
||
}
|
||
|
||
int
|
||
ser_unix_write_prim (struct serial *scb, const void *buf, size_t len)
|
||
{
|
||
return write (scb->fd, buf, len);
|
||
}
|