1.\"- 2.\" Copyright (c) 2008 Guillaume Ballet 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.\" $FreeBSD$ 27.\" 28.Dd August 27, 2008 29.Dt DB_COMMAND 9 30.Os 31.Sh NAME 32.Nm DB_COMMAND , 33.Nm DB_SHOW_COMMAND , 34.Nm DB_SHOW_ALL_COMMAND 35.Nd Extends the ddb command set. 36.Sh SYNOPSIS 37.In ddb/ddb.h 38.Fo DB_COMMAND 39.Fa command_name 40.Fa command_function 41.Fc 42.Fn DB_SHOW_COMMAND "command_name" "command_function" 43.Fn DB_SHOW_ALL_COMMAND "command_name" "command_function" 44.Sh DESCRIPTION 45.Pp 46The 47.Fn DB_COMMAND 48macro adds 49.Fa command_name 50to the list of top-level commands. 51Invoking 52.Fa command_name 53from ddb will call 54.Fa command_function . 55.Pp 56The 57.Fn DB_SHOW_COMMAND 58and 59.Fn DB_SHOW_ALL_COMMAND 60are roughly equivalent to 61.Fn DB_COMMAND 62but in these cases, 63.Fa command_name 64is a sub-command of the ddb 65.Sy show 66command and 67.Sy show all 68command, respectively. 69.Pp 70The general command syntax: 71.Cm command Ns Op Li \&/ Ns Ar modifier 72.Ar address Ns Op Li , Ns Ar count , 73translates into the following parameters for 74.Fa command_function : 75.Bl -tag 76.It Fa addr 77The address passed to the command as an argument. 78.It Fa have_addr 79A boolean value that is true if the addr field is valid. 80.It Fa count 81The number of quad words starting at offset 82.Fa addr 83that the command must process. 84.It Fa modif 85A pointer to the string of modifiers. That is, a series of symbols used to pass some options to the command. For example, the 86.Sy examine 87command will display words in decimal form if it is passed the modifier "d". 88.El 89.Sh EXAMPLE 90In your module, the command is declared as: 91.Pp 92.Bd -literal 93DB_COMMAND(mycmd, my_cmd_func) 94{ 95 if (have_addr) 96 db_printf("Calling my command with address %p\\n", addr); 97} 98.Ed 99.Pp 100Then, when in ddb: 101.Pp 102.Bd -literal 103.Bf Sy 104db> mycmd 0x1000 105Calling my command with address 0x1000 106db> 107.Ef 108.Ed 109.Sh "SEE ALSO" 110.Xr ddb 4 111.Sh AUTHOR 112This manual page was written by 113.An Guillaume Ballet Aq gballet@gmail.com . 114