mirror of
https://github.com/espressif/binutils-gdb.git
synced 2025-12-19 01:19:41 +08:00
1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
591 lines
11 KiB
C
591 lines
11 KiB
C
/* Serial interface for local (hardwired) serial ports on Un*x like systems
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Copyright (C) 1992-2024 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 "gdbsupport/gdb_sys_time.h"
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#include "gdbsupport/gdb_select.h"
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#include "gdbcmd.h"
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#include "gdbsupport/filestuff.h"
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#include <termios.h>
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#include "gdbsupport/scoped_ignore_sigttou.h"
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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 bool 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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gdb_printf (file, _("Hardware flow control is %s.\n"), value);
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}
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#endif
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static void hardwire_raw (struct serial *scb);
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static int rate_to_code (int rate);
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static void hardwire_setbaudrate (struct serial *scb, int rate);
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static int hardwire_setparity (struct serial *scb, int parity);
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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 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 void hardwire_send_break (struct serial *);
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static int hardwire_setstopbits (struct serial *, int);
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/* Open up a real live device for serial I/O. */
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static void
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hardwire_open (struct serial *scb, const char *name)
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{
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scb->fd = gdb_open_cloexec (name, O_RDWR, 0).release ();
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if (scb->fd < 0)
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perror_with_name ("could not open device");
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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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if (tcgetattr (scb->fd, &state->termios) < 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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set_tty_state (struct serial *scb, struct hardwire_ttystate *state)
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{
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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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}
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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 = XNEW (struct hardwire_ttystate);
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if (get_tty_state (scb, state))
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{
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xfree (state);
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return NULL;
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}
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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 = XNEW (struct hardwire_ttystate);
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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 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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gdb_printf (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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gdb_printf (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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gdb_printf (stream, "c_line = 0x%x.\n", state->termios.c_line);
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#endif
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gdb_printf (stream, "c_cc: ");
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for (i = 0; i < NCCS; i += 1)
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gdb_printf (stream, "0x%x ", state->termios.c_cc[i]);
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gdb_printf (stream, "\n");
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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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/* Ignore SIGTTOU which may occur during the drain. */
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scoped_ignore_sigttou ignore_sigttou;
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return tcdrain (scb->fd);
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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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return tcflush (scb->fd, TCOFLUSH);
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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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return tcflush (scb->fd, TCIFLUSH);
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}
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static void
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hardwire_send_break (struct serial *scb)
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{
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if (tcsendbreak (scb->fd, 0) == -1)
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perror_with_name ("sending break");
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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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gdb_printf (gdb_stderr, "get_tty_state failed: %s\n",
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safe_strerror (errno));
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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;
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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;
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if (set_tty_state (scb, &state))
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gdb_printf (gdb_stderr, "set_tty_state failed: %s\n",
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safe_strerror (errno));
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}
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#ifndef B19200
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#define B19200 EXTA
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#endif
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#ifndef B38400
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#define B38400 EXTB
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#endif
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/* Translate baud rates from integers to damn B_codes. Unix should
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have outgrown this crap years ago, but even POSIX wouldn't buck it. */
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static struct
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{
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int rate;
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int code;
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}
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baudtab[] =
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{
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{
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50, B50
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}
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,
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{
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75, B75
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}
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,
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{
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110, B110
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}
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,
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{
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134, B134
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}
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,
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{
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150, B150
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}
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,
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{
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200, B200
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}
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,
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{
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300, B300
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}
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,
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{
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600, B600
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}
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,
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{
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1200, B1200
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}
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,
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{
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1800, B1800
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}
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,
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{
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2400, B2400
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}
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,
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{
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4800, B4800
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}
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,
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{
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9600, B9600
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}
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,
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{
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19200, B19200
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}
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,
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{
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38400, B38400
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}
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,
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#ifdef B57600
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{
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57600, B57600
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}
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,
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#endif
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#ifdef B115200
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{
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115200, B115200
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}
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,
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#endif
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#ifdef B230400
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{
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230400, B230400
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}
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,
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#endif
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#ifdef B460800
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{
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460800, B460800
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}
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,
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#endif
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#ifdef B500000
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{
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500000, B500000
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}
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,
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#endif
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#ifdef B576000
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{
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576000, B576000
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}
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,
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#endif
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#ifdef B921600
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{
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921600, B921600
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}
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,
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#endif
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#ifdef B1000000
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{
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1000000, B1000000
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}
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,
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#endif
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#ifdef B1152000
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{
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1152000, B1152000
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}
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,
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#endif
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#ifdef B1500000
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{
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1500000, B1500000
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}
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,
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#endif
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#ifdef B2000000
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{
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2000000, B2000000
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}
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,
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#endif
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#ifdef B2500000
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{
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2500000, B2500000
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}
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,
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#endif
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#ifdef B3000000
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{
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3000000, B3000000
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}
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,
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#endif
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#ifdef B3500000
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{
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3500000, B3500000
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}
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,
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#endif
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#ifdef B4000000
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{
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4000000, B4000000
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}
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,
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#endif
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{
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-1, -1
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}
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,
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};
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static int
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rate_to_code (int rate)
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{
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int i;
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for (i = 0; baudtab[i].rate != -1; i++)
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{
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/* test for perfect macth. */
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if (rate == baudtab[i].rate)
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return baudtab[i].code;
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else
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{
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/* check if it is in between valid values. */
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if (rate < baudtab[i].rate)
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{
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if (i)
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{
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error (_("Invalid baud rate %d. "
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"Closest values are %d and %d."),
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rate, baudtab[i - 1].rate, baudtab[i].rate);
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}
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else
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{
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error (_("Invalid baud rate %d. Minimum value is %d."),
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rate, baudtab[0].rate);
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}
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}
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}
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}
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/* The requested speed was too large. */
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error (_("Invalid baud rate %d. Maximum value is %d."),
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rate, baudtab[i - 1].rate);
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}
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static void
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hardwire_setbaudrate (struct serial *scb, int rate)
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{
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struct hardwire_ttystate state;
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int baud_code = rate_to_code (rate);
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if (get_tty_state (scb, &state))
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perror_with_name ("could not get tty state");
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cfsetospeed (&state.termios, baud_code);
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cfsetispeed (&state.termios, baud_code);
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if (set_tty_state (scb, &state))
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perror_with_name ("could not set tty state");
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}
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static int
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hardwire_setstopbits (struct serial *scb, int num)
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{
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struct hardwire_ttystate state;
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int newbit;
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if (get_tty_state (scb, &state))
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return -1;
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switch (num)
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{
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case SERIAL_1_STOPBITS:
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newbit = 0;
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break;
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case SERIAL_1_AND_A_HALF_STOPBITS:
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case SERIAL_2_STOPBITS:
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newbit = 1;
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break;
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default:
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return 1;
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}
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if (!newbit)
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state.termios.c_cflag &= ~CSTOPB;
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else
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state.termios.c_cflag |= CSTOPB; /* two bits */
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return set_tty_state (scb, &state);
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}
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/* Implement the "setparity" serial_ops callback. */
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static int
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hardwire_setparity (struct serial *scb, int parity)
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{
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struct hardwire_ttystate state;
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int newparity = 0;
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if (get_tty_state (scb, &state))
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return -1;
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switch (parity)
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{
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case GDBPARITY_NONE:
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newparity = 0;
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break;
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case GDBPARITY_ODD:
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newparity = PARENB | PARODD;
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break;
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case GDBPARITY_EVEN:
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newparity = PARENB;
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break;
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default:
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internal_warning ("Incorrect parity value: %d", parity);
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return -1;
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}
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state.termios.c_cflag &= ~(PARENB | PARODD);
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state.termios.c_cflag |= newparity;
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return set_tty_state (scb, &state);
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}
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static void
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hardwire_close (struct serial *scb)
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{
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if (scb->fd < 0)
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return;
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close (scb->fd);
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scb->fd = -1;
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}
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/* The hardwire ops. */
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static const struct serial_ops hardwire_ops =
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{
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"hardwire",
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hardwire_open,
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hardwire_close,
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NULL,
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ser_base_readchar,
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ser_base_write,
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hardwire_flush_output,
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hardwire_flush_input,
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hardwire_send_break,
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hardwire_raw,
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hardwire_get_tty_state,
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hardwire_copy_tty_state,
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hardwire_set_tty_state,
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hardwire_print_tty_state,
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hardwire_setbaudrate,
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hardwire_setstopbits,
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hardwire_setparity,
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hardwire_drain_output,
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ser_base_async,
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ser_unix_read_prim,
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ser_unix_write_prim
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};
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void _initialize_ser_hardwire ();
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void
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_initialize_ser_hardwire ()
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{
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serial_add_interface (&hardwire_ops);
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#ifdef CRTSCTS
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add_setshow_boolean_cmd ("remoteflow", no_class,
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&serial_hwflow, _("\
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Set use of hardware flow control for remote serial I/O."), _("\
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Show use of hardware flow control for remote serial I/O."), _("\
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Enable or disable hardware flow control (RTS/CTS) on the serial port\n\
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when debugging using remote targets."),
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NULL,
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show_serial_hwflow,
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&setlist, &showlist);
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#endif
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}
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int
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ser_unix_read_prim (struct serial *scb, size_t count)
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{
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int result = recv (scb->fd, scb->buf, count, 0);
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if (result == -1 && errno != EINTR)
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perror_with_name ("error while reading");
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return result;
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}
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int
|
||
ser_unix_write_prim (struct serial *scb, const void *buf, size_t len)
|
||
{
|
||
int result = write (scb->fd, buf, len);
|
||
if (result == -1 && errno != EINTR)
|
||
perror_with_name ("error while writing");
|
||
return result;
|
||
}
|