redhat man page for modlinkage

modlinkage(9S)                                              Data Structures for Drivers                                             modlinkage(9S)

NAME
       modlinkage - module linkage structure

SYNOPSIS
       #include <sys/modctl.h>

INTERFACE LEVEL
       Solaris DDI specific (Solaris DDI)

DESCRIPTION
       The modlinkage structure is provided by the module writer to the routines that install, remove, and retrieve information from a module. See
       _init(9E), _fini(9E), and _info(9E).

STRUCTURE MEMBERS
       int    ml_rev
       void   *ml_linkage[4];

       ml_rev          Is the revision of the loadable modules system.  This must have the value MODREV_1 .

       ml_linkage      Is a null-terminated array of pointers to linkage structures. Driver modules have only one linkage structure.

SEE ALSO
       add_drv(1M), _fini(9E), _info(9E), _init(9E), modldrv(9S), modlstrmod(9S)

       Writing Device Drivers

SunOS 5.10                                                          18 Sep 1992                                                     modlinkage(9S)