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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | HISTORY | BUGS | SEE ALSO | COLOPHON |
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get_kernel_syms(2) System Calls Manual get_kernel_syms(2)
get_kernel_syms - retrieve exported kernel and module symbols
#include <linux/module.h>
[[deprecated]] int get_kernel_syms(struct kernel_sym *table);
Note: This system call is present only 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.
On success, returns the number of symbols copied to table. On
error, -1 is returned and errno is set to indicate the error.
There is only one possible error return:
ENOSYS get_kernel_syms() is not supported in this version of the
kernel.
Linux.
Removed in Linux 2.6.
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 glibc 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).
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).
create_module(2), delete_module(2), init_module(2),
query_module(2)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.15.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-08-11. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.15 2025-05-17 get_kernel_syms(2)
Pages that refer to this page: query_module(2), syscalls(2)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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