| 1 | /* Remote serial support interface definitions for GDB, the GNU Debugger. |
| 2 | Copyright 1992, 1993 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | /* Terminal state pointer. This is specific to each type of interface. */ |
| 21 | |
| 22 | typedef PTR serial_ttystate; |
| 23 | |
| 24 | struct _serial_t |
| 25 | { |
| 26 | int fd; /* File descriptor */ |
| 27 | struct serial_ops *ops; /* Function vector */ |
| 28 | serial_ttystate ttystate; /* Not used (yet) */ |
| 29 | int bufcnt; /* Amount of data in receive buffer */ |
| 30 | unsigned char *bufp; /* Current byte */ |
| 31 | unsigned char buf[BUFSIZ]; /* Da buffer itself */ |
| 32 | int current_timeout; /* (termio{s} only), last value of VTIME */ |
| 33 | }; |
| 34 | |
| 35 | typedef struct _serial_t *serial_t; |
| 36 | |
| 37 | struct serial_ops { |
| 38 | char *name; |
| 39 | struct serial_ops *next; |
| 40 | int (*open) PARAMS ((serial_t, const char *name)); |
| 41 | void (*close) PARAMS ((serial_t)); |
| 42 | int (*readchar) PARAMS ((serial_t, int timeout)); |
| 43 | int (*write) PARAMS ((serial_t, const char *str, int len)); |
| 44 | int (*flush_output) PARAMS ((serial_t)); |
| 45 | int (*flush_input) PARAMS ((serial_t)); |
| 46 | int (*send_break) PARAMS ((serial_t)); |
| 47 | void (*go_raw) PARAMS ((serial_t)); |
| 48 | serial_ttystate (*get_tty_state) PARAMS ((serial_t)); |
| 49 | int (*set_tty_state) PARAMS ((serial_t, serial_ttystate)); |
| 50 | void (*print_tty_state) PARAMS ((serial_t, serial_ttystate)); |
| 51 | int (*noflush_set_tty_state) |
| 52 | PARAMS ((serial_t, serial_ttystate, serial_ttystate)); |
| 53 | int (*setbaudrate) PARAMS ((serial_t, int rate)); |
| 54 | int (*set_process_group) PARAMS ((serial_t, serial_ttystate, int)); |
| 55 | }; |
| 56 | |
| 57 | /* Add a new serial interface to the interface list */ |
| 58 | |
| 59 | void serial_add_interface PARAMS ((struct serial_ops *optable)); |
| 60 | |
| 61 | serial_t serial_open PARAMS ((const char *name)); |
| 62 | |
| 63 | serial_t serial_fdopen PARAMS ((int fd)); |
| 64 | |
| 65 | /* For most routines, if a failure is indicated, then errno should be |
| 66 | examined. */ |
| 67 | |
| 68 | /* Try to open NAME. Returns a new serial_t on success, NULL on failure. |
| 69 | */ |
| 70 | |
| 71 | #define SERIAL_OPEN(NAME) serial_open(NAME) |
| 72 | |
| 73 | /* Open a new serial stream using a file handle. */ |
| 74 | |
| 75 | #define SERIAL_FDOPEN(FD) serial_fdopen(FD) |
| 76 | |
| 77 | /* Flush pending output. Might also flush input (if this system can't flush |
| 78 | only output). */ |
| 79 | |
| 80 | #define SERIAL_FLUSH_OUTPUT(SERIAL_T) \ |
| 81 | ((SERIAL_T)->ops->flush_output((SERIAL_T))) |
| 82 | |
| 83 | /* Flush pending input. Might also flush output (if this system can't flush |
| 84 | only input). */ |
| 85 | |
| 86 | #define SERIAL_FLUSH_INPUT(SERIAL_T)\ |
| 87 | ((*(SERIAL_T)->ops->flush_input) ((SERIAL_T))) |
| 88 | |
| 89 | /* Send a break between 0.25 and 0.5 seconds long. */ |
| 90 | |
| 91 | #define SERIAL_SEND_BREAK(SERIAL_T) \ |
| 92 | ((*(SERIAL_T)->ops->send_break) (SERIAL_T)) |
| 93 | |
| 94 | /* Turn the port into raw mode. */ |
| 95 | |
| 96 | #define SERIAL_RAW(SERIAL_T) (SERIAL_T)->ops->go_raw((SERIAL_T)) |
| 97 | |
| 98 | /* Return a pointer to a newly malloc'd ttystate containing the state |
| 99 | of the tty. */ |
| 100 | #define SERIAL_GET_TTY_STATE(SERIAL_T) (SERIAL_T)->ops->get_tty_state((SERIAL_T)) |
| 101 | |
| 102 | /* Set the state of the tty to TTYSTATE. The change is immediate. |
| 103 | When changing to or from raw mode, input might be discarded. */ |
| 104 | #define SERIAL_SET_TTY_STATE(SERIAL_T, TTYSTATE) (SERIAL_T)->ops->set_tty_state((SERIAL_T), (TTYSTATE)) |
| 105 | |
| 106 | /* printf_filtered a user-comprehensible description of ttystate. */ |
| 107 | #define SERIAL_PRINT_TTY_STATE(SERIAL_T, TTYSTATE) \ |
| 108 | ((*((SERIAL_T)->ops->print_tty_state)) ((SERIAL_T), (TTYSTATE))) |
| 109 | |
| 110 | /* Set the tty state to NEW_TTYSTATE, where OLD_TTYSTATE is the |
| 111 | current state (generally obtained from a recent call to |
| 112 | SERIAL_GET_TTY_STATE), but be careful not to discard any input. |
| 113 | This means that we never switch in or out of raw mode, even |
| 114 | if NEW_TTYSTATE specifies a switch. */ |
| 115 | #define SERIAL_NOFLUSH_SET_TTY_STATE(SERIAL_T, NEW_TTYSTATE, OLD_TTYSTATE) \ |
| 116 | ((*((SERIAL_T)->ops->noflush_set_tty_state)) \ |
| 117 | ((SERIAL_T), (NEW_TTYSTATE), (OLD_TTYSTATE))) |
| 118 | |
| 119 | /* Read one char from the serial device with TIMEOUT seconds to wait |
| 120 | or -1 to wait forever. Use timeout of 0 to effect a poll. Returns |
| 121 | char if ok, else one of the following codes. Note that all error |
| 122 | codes are guaranteed to be < 0. */ |
| 123 | |
| 124 | #define SERIAL_ERROR -1 /* General error, see errno for details */ |
| 125 | #define SERIAL_TIMEOUT -2 |
| 126 | #define SERIAL_EOF -3 |
| 127 | |
| 128 | #define SERIAL_READCHAR(SERIAL_T, TIMEOUT) ((SERIAL_T)->ops->readchar((SERIAL_T), TIMEOUT)) |
| 129 | |
| 130 | /* Set the baudrate to the decimal value supplied. Returns 0 for success, |
| 131 | -1 for failure. */ |
| 132 | |
| 133 | #define SERIAL_SETBAUDRATE(SERIAL_T, RATE) ((SERIAL_T)->ops->setbaudrate((SERIAL_T), RATE)) |
| 134 | |
| 135 | /* Write LEN chars from STRING to the port SERIAL_T. Returns 0 for |
| 136 | success, non-zero for failure. */ |
| 137 | |
| 138 | #define SERIAL_WRITE(SERIAL_T, STRING, LEN) ((SERIAL_T)->ops->write((SERIAL_T), STRING, LEN)) |
| 139 | |
| 140 | /* Push out all buffers, close the device and destroy SERIAL_T. */ |
| 141 | |
| 142 | void serial_close PARAMS ((serial_t)); |
| 143 | |
| 144 | #define SERIAL_CLOSE(SERIAL_T) serial_close(SERIAL_T) |
| 145 | |
| 146 | /* Destroy SERIAL_T without doing the rest of the stuff that SERIAL_CLOSE |
| 147 | does. */ |
| 148 | |
| 149 | #define SERIAL_UN_FDOPEN(SERIAL_T) (free (SERIAL_T)) |
| 150 | |
| 151 | /* Set the process group saved in TTYSTATE to GROUP. This just modifies |
| 152 | the ttystate setting; need to call SERIAL_SET_TTY_STATE for this to |
| 153 | actually have any effect. If no job control, then don't do anything. */ |
| 154 | #define SERIAL_SET_PROCESS_GROUP(SERIAL_T, TTYSTATE, GROUP) \ |
| 155 | ((*((SERIAL_T)->ops->set_process_group)) (SERIAL_T, TTYSTATE, GROUP)) |
| 156 | |
| 157 | /* Do we have job control? Can be assumed to always be the same within |
| 158 | a given run of GDB. In ser-unix.c, ser-go32.c, etc. */ |
| 159 | extern int job_control; |
| 160 | |
| 161 | /* Set the process group of the caller to its own pid, or do nothing if |
| 162 | we lack job control. */ |
| 163 | extern int gdb_setpgid PARAMS ((void)); |