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-.\"
-.\" Copyright (c) 1998 John D. Polstra
-.\" 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.
-.\"
-.\"	$Id$
-.\"
-.Dd February 5, 1998
-.Os FreeBSD
-.Dt DLADDR 3
-.Sh NAME
-.Nm dladdr
-.Nd find the shared object containing a given address
-.Sh SYNOPSIS
-.Fd #include <dlfcn.h>
-.Ft int
-.Fn dladdr "const void *addr" "Dl_info *info"
-.Sh DESCRIPTION
-.Nm
-queries the dynamic linker for information about the shared object
-containing the address
-.Fa addr .
-The information is returned in the structure specified by
-.Fa info .
-The structure contains at least the following members:
-.Bl -tag -width "XXXconst char *dli_fname"
-.It Li "const char *dli_fname"
-The pathname of the shared object containing the address.
-.It Li "void *dli_fbase"
-The base address at which the shared object is mapped into the
-address space of the calling process.
-.It Li "const char *dli_sname"
-The name of the nearest run-time symbol with a value less than or
-equal to
-.Fa addr .
-When possible, the symbol name is returned as it would appear in C
-source code.
-.Pp
-If no symbol with a suitable value is found, both this field and
-.Va dli_saddr
-are set to
-.Dv NULL .
-.It Li "void *dli_saddr"
-The value of the symbol returned in
-.Li dli_sname .
-.El
-.Pp
-.Nm
-is available only in dynamically linked programs.
-.Sh ERRORS
-If a mapped shared object containing
-.Fa addr
-cannot be found,
-.Nm
-returns 0.
-In that case, a message detailing the failure can be retrieved by
-calling
-.Fn dlerror .
-.Pp
-On success, a non-zero value is returned.
-.Sh SEE ALSO
-.Xr dlopen 3 ,
-.Xr rtld 1
-.Sh HISTORY
-The
-.Nm
-function first appeared in the Solaris operating system.
-.Sh BUGS
-This implementation is bug-compatible with the Solaris
-implementation.  In particular, the following bugs are present:
-.Bl -bullet
-.It
-If
-.Fa addr
-lies in the main executable rather than in a shared library, the
-pathname returned in
-.Va dli_fname
-may not be correct.  The pathname is taken directly from
-.Va argv[0]
-of the calling process.  When executing a program specified by its
-full pathname, most shells set
-.Va argv[0]
-to the pathname.  But this is not required of shells or guaranteed
-by the operating system.
-.It
-If
-.Fa addr
-is of the form
-.Va &func ,
-where
-.Va func
-is a global function, its value may be an unpleasant surprise.  In
-dynamically linked programs, the address of a global function is
-considered to point to its program linkage table entry, rather than to
-the entry point of the function itself.  This causes most global
-functions to appear to be defined within the main executable, rather
-than in the shared libraries where the actual code resides.
-.It
-Returning 0 as an indication of failure goes against long-standing
-Unix tradition.
-.El