1.\" Copyright (c) 1992, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software developed by the Computer Systems 5.\" Engineering group at Lawrence Berkeley Laboratory under DARPA contract 6.\" BG 91-66 and contributed to Berkeley. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)kvm_nlist.3 8.1 (Berkeley) 6/4/93 33.\" $FreeBSD$ 34.\" 35.Dd June 4, 1993 36.Dt KVM_NLIST 3 37.Os 38.Sh NAME 39.Nm kvm_nlist 40.Nd retrieve symbol table names from a kernel image 41.Sh LIBRARY 42.Lb libkvm 43.Sh SYNOPSIS 44.In kvm.h 45.In nlist.h 46.Ft int 47.Fn kvm_nlist "kvm_t *kd" "struct nlist *nl" 48.Sh DESCRIPTION 49The 50.Fn kvm_nlist 51function retrieves the symbol table entries indicated by the name list argument 52.Fa \&nl . 53This argument points to an array of nlist structures, terminated by 54an entry whose n_name field is 55.Dv NULL 56(see 57.Xr nlist 3 ) . 58Each symbol is looked up using the n_name field, and if found, the 59corresponding n_type and n_value fields are filled in. 60These fields are set 61to 0 if the symbol is not found. 62.Pp 63The 64.Xr kldsym 2 65system call is used to locate the symbol. 66This is a less than perfect 67emulation of the nlist values but has the advantage of being aware of kernel 68modules and is reasonably fast. 69.Sh RETURN VALUES 70The 71.Fn kvm_nlist 72function returns the number of invalid entries found. 73If the kernel symbol table was unreadable, -1 is returned. 74.Sh SEE ALSO 75.Xr kldsym 2 , 76.Xr kvm 3 , 77.Xr kvm_close 3 , 78.Xr kvm_getargv 3 , 79.Xr kvm_getenvv 3 , 80.Xr kvm_geterr 3 , 81.Xr kvm_getprocs 3 , 82.Xr kvm_open 3 , 83.Xr kvm_openfiles 3 , 84.Xr kvm_read 3 , 85.Xr kvm_write 3 86