/* Remote serial support interface definitions for GDB, the GNU Debugger.
- Copyright 1992, 1993 Free Software Foundation, Inc.
+ Copyright (C) 1992-2020 Free Software Foundation, Inc.
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
-/* Terminal state pointer. This is specific to each type of interface. */
+#ifndef SERIAL_H
+#define SERIAL_H
-typedef PTR serial_ttystate;
+#ifdef USE_WIN32API
+#include <winsock2.h>
+#include <windows.h>
+#endif
-struct _serial_t
-{
- int fd; /* File descriptor */
- struct serial_ops *ops; /* Function vector */
- serial_ttystate ttystate; /* Not used (yet) */
- int bufcnt; /* Amount of data in receive buffer */
- unsigned char *bufp; /* Current byte */
- unsigned char buf[BUFSIZ]; /* Da buffer itself */
- int current_timeout; /* (termio{s} only), last value of VTIME */
-};
+struct ui_file;
-typedef struct _serial_t *serial_t;
-
-struct serial_ops {
- char *name;
- struct serial_ops *next;
- int (*open) PARAMS ((serial_t, const char *name));
- void (*close) PARAMS ((serial_t));
- int (*readchar) PARAMS ((serial_t, int timeout));
- int (*write) PARAMS ((serial_t, const char *str, int len));
- void (*go_raw) PARAMS ((serial_t));
- serial_ttystate (*get_tty_state) PARAMS ((serial_t));
- int (*set_tty_state) PARAMS ((serial_t, serial_ttystate));
- int (*setbaudrate) PARAMS ((serial_t, int rate));
-};
+/* For most routines, if a failure is indicated, then errno should be
+ examined. */
-/* Add a new serial interface to the interface list */
+/* Terminal state pointer. This is specific to each type of
+ interface. */
-void serial_add_interface PARAMS ((struct serial_ops *optable));
+typedef void *serial_ttystate;
+struct serial;
+struct serial_ops;
-serial_t serial_open PARAMS ((const char *name));
+/* Create a new serial for OPS. The new serial is not opened. */
-serial_t serial_fdopen PARAMS ((int fd));
+/* Try to open NAME. Returns a new `struct serial *' on success, NULL
+ on failure. The new serial object has a reference count of 1.
+ Note that some open calls can block and, if possible, should be
+ written to be non-blocking, with calls to ui_look_hook so they can
+ be cancelled. An async interface for open could be added to GDB if
+ necessary. */
-/* For most routines, if a failure is indicated, then errno should be
- examined. */
+extern struct serial *serial_open (const char *name);
+
+/* Open a new serial stream using OPS. */
-/* Try to open NAME. Returns a new serial_t on success, NULL on failure.
- */
+extern struct serial *serial_open_ops (const struct serial_ops *ops);
-#define SERIAL_OPEN(NAME) serial_open(NAME)
+/* Returns true if SCB is open. */
+
+extern int serial_is_open (struct serial *scb);
+
+/* Find an already opened serial stream using a file handle. */
+
+extern struct serial *serial_for_fd (int fd);
/* Open a new serial stream using a file handle. */
-#define SERIAL_FDOPEN(FD) serial_fdopen(FD)
+extern struct serial *serial_fdopen (const int fd);
+
+/* Push out all buffers, close the device and unref SCB. */
+
+extern void serial_close (struct serial *scb);
+
+/* Increment reference count of SCB. */
+
+extern void serial_ref (struct serial *scb);
+
+/* Decrement reference count of SCB. */
+
+extern void serial_unref (struct serial *scb);
+
+/* Create a pipe, and put the read end in FILDES[0], and the write end
+ in FILDES[1]. Returns 0 for success, negative value for error (in
+ which case errno contains the error). */
+
+extern int gdb_pipe (int fildes[2]);
+
+/* Create a pipe with each end wrapped in a `struct serial' interface.
+ Put the read end in scbs[0], and the write end in scbs[1]. Returns
+ 0 for success, negative value for error (in which case errno
+ contains the error). */
+
+extern int serial_pipe (struct serial *scbs[2]);
+
+/* Push out all buffers and destroy SCB without closing the device. */
+
+extern void serial_un_fdopen (struct serial *scb);
+
+/* Read one char from the serial device with TIMEOUT seconds to wait
+ or -1 to wait forever. Use timeout of 0 to effect a poll.
+ Infinite waits are not permitted. Returns unsigned char if ok, else
+ one of the following codes. Note that all error return-codes are
+ guaranteed to be < 0. */
+
+enum serial_rc {
+ SERIAL_ERROR = -1, /* General error. */
+ SERIAL_TIMEOUT = -2, /* Timeout or data-not-ready during read.
+ Unfortunately, through
+ deprecated_ui_loop_hook (), this can also
+ be a QUIT indication. */
+ SERIAL_EOF = -3 /* General end-of-file or remote target
+ connection closed, indication. Includes
+ things like the line dropping dead. */
+};
+
+extern int serial_readchar (struct serial *scb, int timeout);
+
+/* Write COUNT bytes from BUF to the port SCB. Returns 0 for
+ success, non-zero for failure. */
+
+extern int serial_write (struct serial *scb, const void *buf, size_t count);
+
+/* Write a printf style string onto the serial port. */
+
+extern void serial_printf (struct serial *desc,
+ const char *,...) ATTRIBUTE_PRINTF (2, 3);
+
+/* Allow pending output to drain. */
+
+extern int serial_drain_output (struct serial *);
+
+/* Flush (discard) pending output. Might also flush input (if this
+ system can't flush only output). */
+
+extern int serial_flush_output (struct serial *);
+
+/* Flush pending input. Might also flush output (if this system can't
+ flush only input). */
+
+extern int serial_flush_input (struct serial *);
+
+/* Send a break between 0.25 and 0.5 seconds long. */
+
+extern int serial_send_break (struct serial *scb);
+
+/* Turn the port into raw mode. */
+
+extern void serial_raw (struct serial *scb);
+
+/* Return a pointer to a newly malloc'd ttystate containing the state
+ of the tty. */
+
+extern serial_ttystate serial_get_tty_state (struct serial *scb);
+
+/* Return a pointer to a newly malloc'd ttystate containing a copy
+ of the state in TTYSTATE. */
+
+extern serial_ttystate serial_copy_tty_state (struct serial *scb,
+ serial_ttystate ttystate);
+
+/* Set the state of the tty to TTYSTATE. The change is immediate.
+ When changing to or from raw mode, input might be discarded.
+ Returns 0 for success, negative value for error (in which case
+ errno contains the error). */
+
+extern int serial_set_tty_state (struct serial *scb, serial_ttystate ttystate);
+
+/* printf_filtered a user-comprehensible description of ttystate on
+ the specified STREAM. FIXME: At present this sends output to the
+ default stream - GDB_STDOUT. */
+
+extern void serial_print_tty_state (struct serial *scb,
+ serial_ttystate ttystate,
+ struct ui_file *);
+
+/* Set the baudrate to the decimal value supplied. Returns 0 for
+ success, -1 for failure. */
+
+extern int serial_setbaudrate (struct serial *scb, int rate);
+
+/* Set the number of stop bits to the value specified. Returns 0 for
+ success, -1 for failure. */
+
+#define SERIAL_1_STOPBITS 1
+#define SERIAL_1_AND_A_HALF_STOPBITS 2 /* 1.5 bits, snicker... */
+#define SERIAL_2_STOPBITS 3
+
+extern int serial_setstopbits (struct serial *scb, int num);
+
+#define GDBPARITY_NONE 0
+#define GDBPARITY_ODD 1
+#define GDBPARITY_EVEN 2
+
+/* Set parity for serial port. Returns 0 for success, -1 for failure. */
+
+extern int serial_setparity (struct serial *scb, int parity);
-/* Turn the port into raw mode. */
+/* Asynchronous serial interface: */
-#define SERIAL_RAW(SERIAL_T) (SERIAL_T)->ops->go_raw((SERIAL_T))
+/* Can the serial device support asynchronous mode? */
-#define SERIAL_GET_TTY_STATE(SERIAL_T) (SERIAL_T)->ops->get_tty_state((SERIAL_T))
+extern int serial_can_async_p (struct serial *scb);
-#define SERIAL_SET_TTY_STATE(SERIAL_T, TTYSTATE) (SERIAL_T)->ops->set_tty_state((SERIAL_T), (TTYSTATE))
+/* Has the serial device been put in asynchronous mode? */
-/* Read one char from the serial device with TIMEOUT seconds timeout.
- Returns char if ok, else one of the following codes. Note that all
- error codes are guaranteed to be < 0. */
+extern int serial_is_async_p (struct serial *scb);
-#define SERIAL_ERROR -1 /* General error, see errno for details */
-#define SERIAL_TIMEOUT -2
-#define SERIAL_EOF -3
+/* For ASYNC enabled devices, register a callback and enable
+ asynchronous mode. To disable asynchronous mode, register a NULL
+ callback. */
-#define SERIAL_READCHAR(SERIAL_T, TIMEOUT) ((SERIAL_T)->ops->readchar((SERIAL_T), TIMEOUT))
+typedef void (serial_event_ftype) (struct serial *scb, void *context);
+extern void serial_async (struct serial *scb,
+ serial_event_ftype *handler, void *context);
-/* Set the baudrate to the decimal value supplied. Returns 0 for success,
- -1 for failure. */
+/* Trace/debug mechanism.
-#define SERIAL_SETBAUDRATE(SERIAL_T, RATE) ((SERIAL_T)->ops->setbaudrate((SERIAL_T), RATE))
+ serial_debug() enables/disables internal debugging.
+ serial_debug_p() indicates the current debug state. */
-/* Write LEN chars from STRING to the port SERIAL_T. Returns 0 for success,
- -1 for failure. */
+extern void serial_debug (struct serial *scb, int debug_p);
-#define SERIAL_WRITE(SERIAL_T, STRING, LEN) ((SERIAL_T)->ops->write((SERIAL_T), STRING, LEN))
+extern int serial_debug_p (struct serial *scb);
-/* Push out all buffers, close the device and destroy SERIAL_T. */
-void serial_close PARAMS ((serial_t));
+/* Details of an instance of a serial object. */
-#define SERIAL_CLOSE(SERIAL_T) serial_close(SERIAL_T)
+struct serial
+ {
+ /* serial objects are ref counted (but not the underlying
+ connection, just the object's lifetime in memory). */
+ int refcnt;
+ int fd; /* File descriptor */
+ /* File descriptor for a separate error stream that should be
+ immediately forwarded to gdb_stderr. This may be -1.
+ If != -1, this descriptor should be non-blocking or
+ ops->avail should be non-NULL. */
+ int error_fd;
+ const struct serial_ops *ops; /* Function vector */
+ void *state; /* Local context info for open FD */
+ serial_ttystate ttystate; /* Not used (yet) */
+ int bufcnt; /* Amount of data remaining in receive
+ buffer. -ve for sticky errors. */
+ unsigned char *bufp; /* Current byte */
+ unsigned char buf[BUFSIZ]; /* Da buffer itself */
+ char *name; /* The name of the device or host */
+ struct serial *next; /* Pointer to the next `struct serial *' */
+ int debug_p; /* Trace this serial devices operation. */
+ int async_state; /* Async internal state. */
+ void *async_context; /* Async event thread's context */
+ serial_event_ftype *async_handler;/* Async event handler */
+ };
+
+struct serial_ops
+ {
+ const char *name;
+ int (*open) (struct serial *, const char *name);
+ void (*close) (struct serial *);
+ int (*fdopen) (struct serial *, int fd);
+ int (*readchar) (struct serial *, int timeout);
+ int (*write) (struct serial *, const void *buf, size_t count);
+ /* Discard pending output */
+ int (*flush_output) (struct serial *);
+ /* Discard pending input */
+ int (*flush_input) (struct serial *);
+ int (*send_break) (struct serial *);
+ void (*go_raw) (struct serial *);
+ serial_ttystate (*get_tty_state) (struct serial *);
+ serial_ttystate (*copy_tty_state) (struct serial *, serial_ttystate);
+ int (*set_tty_state) (struct serial *, serial_ttystate);
+ void (*print_tty_state) (struct serial *, serial_ttystate,
+ struct ui_file *);
+ int (*setbaudrate) (struct serial *, int rate);
+ int (*setstopbits) (struct serial *, int num);
+ /* Set the value PARITY as parity setting for serial object.
+ Return 0 in the case of success. */
+ int (*setparity) (struct serial *, int parity);
+ /* Wait for output to drain. */
+ int (*drain_output) (struct serial *);
+ /* Change the serial device into/out of asynchronous mode, call
+ the specified function when ever there is something
+ interesting. */
+ void (*async) (struct serial *scb, int async_p);
+ /* Perform a low-level read operation, reading (at most) COUNT
+ bytes into SCB->BUF. Return zero at end of file. */
+ int (*read_prim)(struct serial *scb, size_t count);
+ /* Perform a low-level write operation, writing (at most) COUNT
+ bytes from BUF. */
+ int (*write_prim)(struct serial *scb, const void *buf, size_t count);
+ /* Return that number of bytes that can be read from FD
+ without blocking. Return value of -1 means that the
+ read will not block even if less that requested bytes
+ are available. */
+ int (*avail)(struct serial *scb, int fd);
+
+#ifdef USE_WIN32API
+ /* Return a handle to wait on, indicating available data from SCB
+ when signaled, in *READ. Return a handle indicating errors
+ in *EXCEPT. */
+ void (*wait_handle) (struct serial *scb, HANDLE *read, HANDLE *except);
+ void (*done_wait_handle) (struct serial *scb);
+#endif /* USE_WIN32API */
+ };
+
+/* Add a new serial interface to the interface list. */
+
+extern void serial_add_interface (const struct serial_ops * optable);
+
+/* File in which to record the remote debugging session. */
+
+extern void serial_log_command (struct target_ops *self, const char *);
+
+#ifdef USE_WIN32API
+
+/* Windows-only: find or create handles that we can wait on for this
+ serial device. */
+extern void serial_wait_handle (struct serial *, HANDLE *, HANDLE *);
+
+/* Windows-only: signal that we are done with the wait handles. */
+extern void serial_done_wait_handle (struct serial *);
+
+#endif /* USE_WIN32API */
+
+#endif /* SERIAL_H */
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