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-.\" Copyright (c) 2001 Chris Costello <chris@FreeBSD.org>
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.Dd October 17, 2016
-.Dt KLDSYM 2
-.Os
-.Sh NAME
-.Nm kldsym
-.Nd look up address by symbol name in a KLD
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In sys/param.h
-.In sys/linker.h
-.Ft int
-.Fn kldsym "int fileid" "int cmd" "void *data"
-.Sh DESCRIPTION
-The
-.Fn kldsym
-system call returns the address of the symbol specified in
-.Fa data
-in the module specified by
-.Fa fileid .
-If
-.Fa fileid
-is 0, all loaded modules are searched.
-Currently, the only
-.Fa cmd
-implemented is
-.Dv KLDSYM_LOOKUP .
-.Pp
-The
-.Fa data
-argument is of the following structure:
-.Bd -literal -offset indent
-struct kld_sym_lookup {
-    int         version;        /* sizeof(struct kld_sym_lookup) */
-    char        *symname;       /* Symbol name we are looking up */
-    u_long      symvalue;
-    size_t      symsize;
-};
-.Ed
-.Pp
-The
-.Va version
-member is to be set
-by the code calling
-.Fn kldsym
-to
-.Fn sizeof "struct kld_sym_lookup" .
-The next two members,
-.Va version
-and
-.Va symname ,
-are specified by the user.
-The last two,
-.Va symvalue
-and
-.Va symsize ,
-are filled in by
-.Fn kldsym
-and contain the address associated with
-.Va symname
-and the size of the data it points to, respectively.
-.Sh RETURN VALUES
-.Rv -std kldsym
-.Sh ERRORS
-The
-.Fn kldsym
-system call will fail if:
-.Bl -tag -width Er
-.It Bq Er EINVAL
-Invalid value in
-.Fa data->version
-or
-.Fa cmd .
-.It Bq Er ENOENT
-The
-.Fa fileid
-argument
-is invalid,
-or the specified symbol could not be found.
-.El
-.Sh SEE ALSO
-.Xr kldfind 2 ,
-.Xr kldfirstmod 2 ,
-.Xr kldload 2 ,
-.Xr kldnext 2 ,
-.Xr kldunload 2 ,
-.Xr modfind 2 ,
-.Xr modnext 2 ,
-.Xr modstat 2 ,
-.Xr kld 4
-.Sh HISTORY
-The
-.Fn kldsym
-system call first appeared in
-.Fx 3.0 .