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Index: head/lib/libc/gen/Makefile.inc
===================================================================
--- head/lib/libc/gen/Makefile.inc
+++ head/lib/libc/gen/Makefile.inc
@@ -339,7 +339,8 @@
dlopen.3 dlclose.3 \
dlopen.3 dlerror.3 \
dlopen.3 dlfunc.3 \
- dlopen.3 dlsym.3
+ dlopen.3 dlsym.3 \
+ dlopen.3 dlvsym.3
MLINKS+=err.3 err_set_exit.3 \
err.3 err_set_file.3 \
err.3 errc.3 \
Index: head/lib/libc/gen/dlopen.3
===================================================================
--- head/lib/libc/gen/dlopen.3
+++ head/lib/libc/gen/dlopen.3
@@ -32,13 +32,14 @@
.\" @(#) dlopen.3 1.6 90/01/31 SMI
.\" $FreeBSD$
.\"
-.Dd July 7, 2017
+.Dd January 2, 2019
.Dt DLOPEN 3
.Os
.Sh NAME
.Nm dlopen ,
.Nm fdlopen ,
.Nm dlsym ,
+.Nm dlvsym ,
.Nm dlfunc ,
.Nm dlerror ,
.Nm dlclose
@@ -53,6 +54,8 @@
.Fn fdlopen "int fd" "int mode"
.Ft void *
.Fn dlsym "void * restrict handle" "const char * restrict symbol"
+.Ft void *
+.Fn dlvsym "void * restrict handle" "const char * restrict symbol" "const char * restrict version"
.Ft dlfunc_t
.Fn dlfunc "void * restrict handle" "const char * restrict symbol"
.Ft char *
@@ -74,7 +77,8 @@
.Fa path ,
returning a descriptor that can be used for later
references to the object in calls to
-.Fn dlsym
+.Fn dlsym ,
+.Fn dlvsym
and
.Fn dlclose .
If
@@ -300,6 +304,16 @@
.Fn dlerror .
.Pp
The
+.Fn dlvsym
+function behaves like
+.Fn dlsym ,
+but takes an extra argument
+.Fa version :
+a null-terminated character string which is used to request a specific version
+of
+.Fa symbol .
+.Pp
+The
.Fn dlfunc
function
implements all of the behavior of
@@ -328,6 +342,7 @@
.Fn dladdr ,
.Fn dlinfo ,
.Fn dlsym ,
+.Fn dlvsym ,
.Fn dlfunc ,
or
.Fn dlclose .
@@ -375,7 +390,10 @@
option to
.Xr ld 1
for symbols defined in the executable to become visible to
-.Fn dlsym .
+.Fn dlsym ,
+.Fn dlvsym
+or
+.Fn dlfunc
.Pp
Other ELF platforms require linking with
.Lb libdl
@@ -397,6 +415,7 @@
.Fn dlopen ,
.Fn fdlopen ,
.Fn dlsym ,
+.Fn dlvsym ,
and
.Fn dlfunc
functions

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