mirror of https://github.com/mkerrisk/man-pages
72 lines
2.0 KiB
Groff
72 lines
2.0 KiB
Groff
.\" Copyright (C) 1996 Free Software Foundation, Inc.
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.\" This file is distributed according to the GNU General Public License.
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.\" See the file COPYING in the top level source directory for details.
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.\"
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.\" 2006-02-09, some reformatting by Luc Van Oostenryck; some
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.\" reformatting and rewordings by mtk
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.\"
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.TH GET_KERNEL_SYMS 2 "2002" Linux "Linux Module Support"
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.SH NAME
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get_kernel_syms \- retrieve exported kernel and module symbols
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.SH SYNOPSIS
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.nf
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.B #include <linux/module.h>
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.sp
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.BI "int get_kernel_syms(struct kernel_sym *" table );
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.fi
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.SH DESCRIPTION
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If
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.I table
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is NULL,
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.BR get_kernel_syms ()
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returns the number of symbols available for query.
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Otherwise it fills in a table of structures:
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.PP
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.RS
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.nf
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struct kernel_sym {
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unsigned long value;
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char name[60];
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};
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.fi
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.RE
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.PP
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The symbols are interspersed with magic symbols of the form
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.BI # module-name
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with the kernel having an empty name.
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The value associated with a symbol of this form is the address at
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which the module is loaded.
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.PP
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The symbols exported from each module follow their magic module tag
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and the modules are returned in the reverse of the
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order in which they were loaded.
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.SH "RETURN VALUE"
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Returns the number of symbols copied to
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.IR table .
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There is no possible error return.
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.SH "CONFORMING TO"
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.BR get_kernel_syms ()
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is Linux specific.
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.SH BUGS
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There is no way to indicate the size of the buffer allocated for
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.IR table .
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If symbols have been added to the kernel since the
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program queried for the symbol table size, memory will be corrupted.
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.PP
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The length of exported symbol names is limited to 59 characters.
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.PP
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Because of these limitations, this system call is deprecated in
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favor of
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.BR query_module (2)
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(which is itself nowadays deprecated
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in favor of other interfaces described on its manual page).
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.SH NOTES
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This system call is only present on Linux up until kernel 2.4;
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it was removed in Linux 2.6.
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.\" Removed in Linux-2.5.48
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.SH "SEE ALSO"
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.BR create_module (2),
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.BR delete_module (2),
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.BR init_module (2),
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.BR query_module (2)
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