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and is module aware. Yes, this means that kvm_nlist(3) will find symbols in loaded modules. The emulation of the nlist struct is pretty crude but seems to work well enough for all the users in the tree that I found.
88 lines
3.3 KiB
Groff
88 lines
3.3 KiB
Groff
.\" Copyright (c) 1992, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software developed by the Computer Systems
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.\" Engineering group at Lawrence Berkeley Laboratory under DARPA contract
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.\" BG 91-66 and contributed to Berkeley.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)kvm_nlist.3 8.1 (Berkeley) 6/4/93
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.\" $FreeBSD$
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.\"
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.Dd June 4, 1993
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.Dt KVM_NLIST 3
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.Os
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.Sh NAME
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.Nm kvm_nlist
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.Nd retrieve symbol table names from a kernel image
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.Sh SYNOPSIS
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.Fd #include <kvm.h>
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.Fd #include <nlist.h>
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.Ft int
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.Fn kvm_nlist "kvm_t *kd" "struct nlist *nl"
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.Sh DESCRIPTION
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.Fn kvm_nlist
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retrieves the symbol table entries indicated by the name list argument
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.Fa \&nl .
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This argument points to an array of nlist structures, terminated by
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an entry whose n_name field is
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.Dv NULL
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(see
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.Xr nlist 3 ) .
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Each symbol is looked up using the n_name field, and if found, the
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corresponding n_type and n_value fields are filled in. These fields are set
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to 0 if the symbol is not found.
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.Pp
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.Xr kldsym 2
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is used to locate the symbol. This is a less than perfect emulation
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of the nlist values but has the advantage of being aware of kernel modules
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and is reasonably fast.
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.Sh RETURN VALUES
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The
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.Fn kvm_nlist
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function returns the number of invalid entries found.
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If the kernel symbol table was unreadable, -1 is returned.
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.Sh FILES
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.Bl -tag -width /var/db/kvm_kernel.db -compact
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.It Pa /var/db/kvm_kernel.db
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.El
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.Sh SEE ALSO
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.Xr kldsym 2 ,
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.Xr kvm 3 ,
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.Xr kvm_close 3 ,
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.Xr kvm_getargv 3 ,
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.Xr kvm_getenvv 3 ,
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.Xr kvm_geterr 3 ,
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.Xr kvm_getprocs 3 ,
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.Xr kvm_open 3 ,
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.Xr kvm_openfiles 3 ,
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.Xr kvm_read 3 ,
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.Xr kvm_write 3
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