GET_KERNEL_SYMS(2)                                  Linux Programmer's Manual                                 GET_KERNEL_SYMS(2)



NAME
       get_kernel_syms - retrieve exported kernel and module symbols

SYNOPSIS
       #include <linux/module.h>

       int get_kernel_syms(struct kernel_sym *table);

DESCRIPTION
       If  table is NULL, get_kernel_syms() returns the number of symbols available for query.  Otherwise it fills in a table of
       structures:

           struct kernel_sym {
               unsigned long value;
               char          name[60];
           };

       The symbols are interspersed with magic symbols of the form #module-name with the kernel having an empty name.  The value
       associated with a symbol of this form is the address at which the module is loaded.

       The  symbols  exported  from each module follow their magic module tag and the modules are returned in the reverse of the
       order in which they were loaded.

RETURN VALUE
       On success, returns the number of symbols copied to table.  On error, -1 is returned and errno is set appropriately.

ERRORS
       There is only one possible error return:

       ENOSYS get_kernel_syms() is not supported in this version of the kernel.

VERSIONS
       This system call is only present on Linux up until kernel 2.4; it was removed in Linux 2.6.

CONFORMING TO
       get_kernel_syms() is Linux-specific.

BUGS
       There is no way to indicate the size of the buffer allocated for table.  If symbols have been added to the  kernel  since
       the program queried for the symbol table size, memory will be corrupted.

       The length of exported symbol names is limited to 59 characters.

       Because of these limitations, this system call is deprecated in favor of query_module(2) (which is itself nowadays depre-
       cated in favor of other interfaces described on its manual page).

SEE ALSO
       create_module(2), delete_module(2), init_module(2), query_module(2)

COLOPHON
       This page is part of release 3.25 of the Linux man-pages project.  A description of the project,  and  information  about
       reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



Linux                                                      2007-06-03                                         GET_KERNEL_SYMS(2)