1.\" $NetBSD: kdump.1,v 1.28 2017/09/10 10:09:34 wiz Exp $ 2.\" 3.\" Copyright (c) 1990, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)kdump.1 8.1 (Berkeley) 6/6/93 31.\" 32.Dd September 9, 2017 33.Dt KDUMP 1 34.Os 35.Sh NAME 36.Nm kdump 37.Nd display kernel trace data 38.Sh SYNOPSIS 39.Nm 40.Op Fl dElNnRT 41.Op Fl e Ar emulation 42.Op Fl f Ar file 43.Op Fl m Ar maxdata 44.Op Fl p Ar pid 45.Op Fl t Ar trstr 46.Op Fl x | Fl X Ar size 47.Op Ar file 48.Sh DESCRIPTION 49.Nm 50displays the kernel trace files produced with 51.Xr ktrace 1 52in human readable format. 53The file 54.Pa ktrace.out 55in the current directory is displayed, unless either the 56.Fl f 57option is used, or a file name is supplied as the last argument. 58.Pp 59The options are as follows: 60.Bl -tag -width Fl 61.It Fl d 62Display all numbers in decimal. 63.It Fl E 64Display elapsed timestamps (time since beginning of trace). 65.It Fl e Ar emulation 66If an emulation of a process is unknown, 67interpret system call maps assuming the named emulation instead of 68default "netbsd". 69.It Fl f Ar file 70Display the specified file instead of 71.Pa ktrace.out . 72.It Fl l 73Loop reading the trace file, once the end-of-file is reached, waiting for 74more data. 75.It Fl m Ar maxdata 76Display at most 77.Ar maxdata 78bytes when decoding I/O. 79.It Fl N 80Suppress system call number-to-name translation. 81.It Fl n 82Suppress ad hoc translations. 83Normally 84.Nm 85tries to decode many system calls into a more human readable format. 86For example, 87.Xr ioctl 2 88values are replaced with the macro name and 89.Va errno 90values are replaced with the 91.Xr strerror 3 92string. 93Suppressing this feature yields a more consistent output format and is 94easily amenable to further processing. 95.It Fl p Ar pid 96Only display records from the trace file that are for the indicated pid. 97.It Fl R 98Display relative timestamps (time since previous entry). 99.It Fl T 100Display absolute timestamps for each entry (seconds since epoch). 101.It Fl t Ar trstr 102Restrict display to the specified set of kernel trace points. 103The default is to display everything in the file. 104See the 105.Fl t 106option of 107.Xr ktrace 1 . 108.It Fl x 109Display GIO data in hex and ascii instead of 110.Xr vis 3 111format. 112.It Fl X Ar size 113Same as 114.Fl x 115but display hex values by groups of 116.Ar size 117bytes. 118Supported values are 1, 2, 4, 8, and 16. 119.El 120.Sh SEE ALSO 121.Xr ktrace 1 122.Sh HISTORY 123The 124.Nm 125command appears in 126.Bx 4.4 . 127