create_module(2) — Linux manual page


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

NAME         top

       create_module - create a loadable module entry

SYNOPSIS         top

       #include <linux/module.h>

       caddr_t create_module(const char *name, size_t size);

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

DESCRIPTION         top

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

       create_module() attempts to create a loadable module entry and
       reserve the kernel memory that will be needed to hold the module.
       This system call requires privilege.

RETURN VALUE         top

       On success, returns the kernel address at which the module will
       reside.  On error, -1 is returned and errno is set to indicate
       the error.

ERRORS         top

       EEXIST A module by that name already exists.

       EFAULT name is outside the program's accessible address space.

       EINVAL The requested size is too small even for the module header

       ENOMEM The kernel could not allocate a contiguous block of memory
              large enough for the module.

       ENOSYS create_module() is not supported in this version of the
              kernel (e.g., the kernel is version 2.6 or later).

       EPERM  The caller was not privileged (did not have the
              CAP_SYS_MODULE capability).

VERSIONS         top

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

CONFORMING TO         top

       create_module() is Linux-specific.

NOTES         top

       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).

SEE ALSO         top

       delete_module(2), init_module(2), query_module(2)

COLOPHON         top

       This page is part of release 5.13 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

Linux                          2021-03-22               CREATE_MODULE(2)

Pages that refer to this page: delete_module(2)get_kernel_syms(2)init_module(2)query_module(2)syscalls(2)unimplemented(2)systemd.exec(5)