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);

       Note: No declaration of this system call is provided in glibc headers; see NOTES.

DESCRIPTION

       Note: This system call is present only in kernels before Linux 2.6.

       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 present on Linux only up until kernel 2.4; it was removed in Linux 2.6.

CONFORMING TO

       get_kernel_syms() is Linux-specific.

NOTES

       This  obsolete  system call is not supported by glibc.  No declaration is provided in glibc headers, but, through a quirk of history, glibc
       versions before 2.23 did export an ABI for this system call.  Therefore, in order to employ this system call, it was sufficient to manually
       declare the interface in your code; alternatively, you could invoke the system call using syscall(2).

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 deprecated 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 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

Linux								    2017-09-15							GET_KERNEL_SYMS(2)