mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-24 02:24:46 +08:00
f34652de0b
Currently, every internal_error call must be passed __FILE__/__LINE__
explicitly, like:
internal_error (__FILE__, __LINE__, "foo %d", var);
The need to pass in explicit __FILE__/__LINE__ is there probably
because the function predates widespread and portable variadic macros
availability. We can use variadic macros nowadays, and in fact, we
already use them in several places, including the related
gdb_assert_not_reached.
So this patch renames the internal_error function to something else,
and then reimplements internal_error as a variadic macro that expands
__FILE__/__LINE__ itself.
The result is that we now should call internal_error like so:
internal_error ("foo %d", var);
Likewise for internal_warning.
The patch adjusts all calls sites. 99% of the adjustments were done
with a perl/sed script.
The non-mechanical changes are in gdbsupport/errors.h,
gdbsupport/gdb_assert.h, and gdb/gdbarch.py.
Approved-By: Simon Marchi <simon.marchi@efficios.com>
Change-Id: Ia6f372c11550ca876829e8fd85048f4502bdcf06
530 lines
11 KiB
C
530 lines
11 KiB
C
/* Serial interface for local (hardwired) serial ports on Un*x like systems
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Copyright (C) 1992-2022 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 int hardwire_open (struct serial *scb, const char *name);
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static void hardwire_raw (struct serial *scb);
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static int rate_to_code (int rate);
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static int 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 int 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 int
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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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return -1;
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return 0;
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}
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static int
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get_tty_state (struct serial *scb, struct hardwire_ttystate *state)
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{
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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 int
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hardwire_send_break (struct serial *scb)
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{
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return tcsendbreak (scb->fd, 0);
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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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{
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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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warning (_("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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warning (_("Invalid baud rate %d. Minimum value is %d."),
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rate, baudtab[0].rate);
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}
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return -1;
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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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warning (_("Invalid baud rate %d. Maximum value is %d."),
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rate, baudtab[i - 1].rate);
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return -1;
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}
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static int
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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 (baud_code < 0)
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{
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/* The baud rate was not valid.
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A warning has already been issued. */
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errno = EINVAL;
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return -1;
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}
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if (get_tty_state (scb, &state))
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return -1;
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cfsetospeed (&state.termios, baud_code);
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cfsetispeed (&state.termios, baud_code);
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return set_tty_state (scb, &state);
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}
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static int
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hardwire_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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return read (scb->fd, scb->buf, count);
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}
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int
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ser_unix_write_prim (struct serial *scb, const void *buf, size_t len)
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{
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return write (scb->fd, buf, len);
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}
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