262 lines
9.8 KiB
C
262 lines
9.8 KiB
C
/* Remote serial support interface definitions for GDB, the GNU Debugger.
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Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000
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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 2 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef SERIAL_H
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#define SERIAL_H
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/* For most routines, if a failure is indicated, then errno should be
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examined. */
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/* Terminal state pointer. This is specific to each type of
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interface. */
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typedef void *serial_ttystate;
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struct _serial_t;
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typedef struct _serial_t *serial_t;
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/* Try to open NAME. Returns a new serial_t on success, NULL on
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failure. */
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extern serial_t serial_open (const char *name);
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#define SERIAL_OPEN(NAME) serial_open(NAME)
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/* Open a new serial stream using a file handle. */
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extern serial_t serial_fdopen (const int fd);
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#define SERIAL_FDOPEN(FD) serial_fdopen(FD)
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/* Push out all buffers, close the device and destroy SERIAL_T. */
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extern void serial_close (serial_t);
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#define SERIAL_CLOSE(SERIAL_T) serial_close ((SERIAL_T))
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/* Push out all buffers and destroy SERIAL_T without closing the
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device. */
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extern void serial_un_fdopen (serial_t scb);
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#define SERIAL_UN_FDOPEN(SERIAL_T) serial_un_fdopen ((SERIAL_T))
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/* Read one char from the serial device with TIMEOUT seconds to wait
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or -1 to wait forever. Use timeout of 0 to effect a poll.
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Infinite waits are not permitted. Returns unsigned char if ok, else
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one of the following codes. Note that all error return-codes are
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guaranteed to be < 0. */
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enum serial_rc {
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SERIAL_ERROR = -1, /* General error. */
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SERIAL_TIMEOUT = -2, /* Timeout or data-not-ready during read.
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Unfortunately, through ui_loop_hook(), this
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can also be a QUIT indication. */
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SERIAL_EOF = -3 /* General end-of-file or remote target
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connection closed, indication. Includes
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things like the line dropping dead. */
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};
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extern int serial_readchar (serial_t scb, int timeout);
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#define SERIAL_READCHAR(SERIAL_T, TIMEOUT) serial_readchar ((SERIAL_T), (TIMEOUT))
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/* Write LEN chars from STRING to the port SERIAL_T. Returns 0 for
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success, non-zero for failure. */
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extern int serial_write (serial_t scb, const char *str, int len);
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#define SERIAL_WRITE(SERIAL_T, STRING,LEN) serial_write (SERIAL_T, STRING, LEN)
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/* Write a printf style string onto the serial port. */
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extern void serial_printf (serial_t desc, const char *,...) ATTR_FORMAT (printf, 2, 3);
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/* Allow pending output to drain. */
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extern int serial_drain_output (serial_t);
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#define SERIAL_DRAIN_OUTPUT(SERIAL_T) serial_drain_output ((SERIAL_T))
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/* Flush (discard) pending output. Might also flush input (if this
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system can't flush only output). */
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extern int serial_flush_output (serial_t);
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#define SERIAL_FLUSH_OUTPUT(SERIAL_T) serial_flush_output ((SERIAL_T))
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/* Flush pending input. Might also flush output (if this system can't
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flush only input). */
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extern int serial_flush_input (serial_t);
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#define SERIAL_FLUSH_INPUT(SERIAL_T) serial_flush_input ((SERIAL_T))
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/* Send a break between 0.25 and 0.5 seconds long. */
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extern int serial_send_break (serial_t scb);
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#define SERIAL_SEND_BREAK(SERIAL_T) serial_send_break (SERIAL_T)
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/* Turn the port into raw mode. */
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extern void serial_raw (serial_t scb);
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#define SERIAL_RAW(SERIAL_T) serial_raw ((SERIAL_T))
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/* Return a pointer to a newly malloc'd ttystate containing the state
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of the tty. */
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extern serial_ttystate serial_get_tty_state (serial_t scb);
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#define SERIAL_GET_TTY_STATE(SERIAL_T) serial_get_tty_state ((SERIAL_T))
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/* Set the state of the tty to TTYSTATE. The change is immediate.
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When changing to or from raw mode, input might be discarded.
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Returns 0 for success, negative value for error (in which case
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errno contains the error). */
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extern int serial_set_tty_state (serial_t scb, serial_ttystate ttystate);
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#define SERIAL_SET_TTY_STATE(SERIAL_T, TTYSTATE) serial_set_tty_state ((SERIAL_T), (TTYSTATE))
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/* printf_filtered a user-comprehensible description of ttystate on
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the specified STREAM. FIXME: At present this sends output to the
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default stream - GDB_STDOUT. */
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extern void serial_print_tty_state (serial_t scb, serial_ttystate ttystate, struct ui_file *);
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#define SERIAL_PRINT_TTY_STATE(SERIAL_T, TTYSTATE, STREAM) serial_print_tty_state ((SERIAL_T), (TTYSTATE), (STREAM))
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/* Set the tty state to NEW_TTYSTATE, where OLD_TTYSTATE is the
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current state (generally obtained from a recent call to
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SERIAL_GET_TTY_STATE), but be careful not to discard any input.
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This means that we never switch in or out of raw mode, even if
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NEW_TTYSTATE specifies a switch. */
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extern int serial_noflush_set_tty_state (serial_t scb, serial_ttystate new_ttystate, serial_ttystate old_ttystate);
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#define SERIAL_NOFLUSH_SET_TTY_STATE(SERIAL_T, NEW_TTYSTATE, OLD_TTYSTATE) \
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serial_noflush_set_tty_state ((SERIAL_T), (NEW_TTYSTATE), (OLD_TTYSTATE))
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/* Set the baudrate to the decimal value supplied. Returns 0 for
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success, -1 for failure. */
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extern int serial_setbaudrate (serial_t scb, int rate);
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#define SERIAL_SETBAUDRATE(SERIAL_T, RATE) serial_setbaudrate ((SERIAL_T), (RATE))
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/* Set the number of stop bits to the value specified. Returns 0 for
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success, -1 for failure. */
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#define SERIAL_1_STOPBITS 1
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#define SERIAL_1_AND_A_HALF_STOPBITS 2 /* 1.5 bits, snicker... */
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#define SERIAL_2_STOPBITS 3
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extern int serial_setstopbits (serial_t scb, int num);
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#define SERIAL_SETSTOPBITS(SERIAL_T, NUM) serial_setstopbits ((SERIAL_T), (NUM))
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/* Asynchronous serial interface: */
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/* Can the serial device support asynchronous mode? */
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extern int serial_can_async_p (serial_t scb);
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#define SERIAL_CAN_ASYNC_P(SERIAL_T) serial_can_async_p ((SERIAL_T))
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/* Has the serial device been put in asynchronous mode? */
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extern int serial_is_async_p (serial_t scb);
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#define SERIAL_IS_ASYNC_P(SERIAL_T) serial_is_async_p ((SERIAL_T))
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/* For ASYNC enabled devices, register a callback and enable
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asynchronous mode. To disable asynchronous mode, register a NULL
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callback. */
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typedef void (serial_event_ftype) (serial_t scb, void *context);
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extern void serial_async (serial_t scb, serial_event_ftype *handler, void *context);
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#define SERIAL_ASYNC(SERIAL_T, HANDLER, CONTEXT) serial_async ((SERIAL_T), (HANDLER), (CONTEXT))
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/* Provide direct access to the underlying FD (if any) used to
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implement the serial device. This interface is clearly
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deprecated. Will call internal_error() if the operation isn't
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applicable to the current serial device. */
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extern int deprecated_serial_fd (serial_t scb);
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#define DEPRECATED_SERIAL_FD(SERIAL_T) deprecated_serial_fd ((SERIAL_T))
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/* Trace/debug mechanism.
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SERIAL_DEBUG() enables/disables internal debugging.
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SERIAL_DEBUG_P() indicates the current debug state. */
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extern void serial_debug (serial_t scb, int debug_p);
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#define SERIAL_DEBUG(SERIAL_T, DEBUG_P) serial_debug ((SERIAL_T), (DEBUG_P))
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extern int serial_debug_p (serial_t scb);
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#define SERIAL_DEBUG_P(SERIAL_T) serial_debug_p ((SERIAL_T))
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/* Details of an instance of a serial object */
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struct _serial_t
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{
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int fd; /* File descriptor */
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struct serial_ops *ops; /* Function vector */
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void *state; /* Local context info for open FD */
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serial_ttystate ttystate; /* Not used (yet) */
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int bufcnt; /* Amount of data remaining in receive
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buffer. -ve for sticky errors. */
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unsigned char *bufp; /* Current byte */
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unsigned char buf[BUFSIZ]; /* Da buffer itself */
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int current_timeout; /* (ser-unix.c termio{,s} only), last
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value of VTIME */
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int timeout_remaining; /* (ser-unix.c termio{,s} only), we
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still need to wait for this many
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more seconds. */
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char *name; /* The name of the device or host */
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struct _serial_t *next; /* Pointer to the next serial_t */
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int refcnt; /* Number of pointers to this block */
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int debug_p; /* Trace this serial devices operation. */
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int async_state; /* Async internal state. */
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void *async_context; /* Async event thread's context */
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serial_event_ftype *async_handler;/* Async event handler */
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};
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struct serial_ops
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{
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char *name;
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struct serial_ops *next;
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int (*open) (serial_t, const char *name);
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void (*close) (serial_t);
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int (*readchar) (serial_t, int timeout);
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int (*write) (serial_t, const char *str, int len);
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/* Discard pending output */
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int (*flush_output) (serial_t);
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/* Discard pending input */
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int (*flush_input) (serial_t);
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int (*send_break) (serial_t);
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void (*go_raw) (serial_t);
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serial_ttystate (*get_tty_state) (serial_t);
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int (*set_tty_state) (serial_t, serial_ttystate);
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void (*print_tty_state) (serial_t, serial_ttystate, struct ui_file *);
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int (*noflush_set_tty_state) (serial_t, serial_ttystate, serial_ttystate);
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int (*setbaudrate) (serial_t, int rate);
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int (*setstopbits) (serial_t, int num);
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/* Wait for output to drain */
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int (*drain_output) (serial_t);
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/* Change the serial device into/out of asynchronous mode, call
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the specified function when ever there is something
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interesting. */
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void (*async) (serial_t scb, int async_p);
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};
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/* Add a new serial interface to the interface list */
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extern void serial_add_interface (struct serial_ops * optable);
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/* File in which to record the remote debugging session */
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extern void serial_log_command (const char *);
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#endif /* SERIAL_H */
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