/usr/share/systemtap/tapset/endian.stp is in systemtap-common 1.7-1+deb7u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | function big_endian2:long (val:long) %{ /* pure */
THIS->__retvalue = cpu_to_be16(THIS->val);
%}
function big_endian4:long (val:long) %{ /* pure */
THIS->__retvalue = cpu_to_be32(THIS->val);
%}
function big_endian8:long (val:long) %{ /* pure */
THIS->__retvalue = cpu_to_be64(THIS->val);
%}
function little_endian2:long (val:long) %{ /* pure */
THIS->__retvalue = cpu_to_le16(THIS->val);
%}
function little_endian4:long (val:long) %{ /* pure */
THIS->__retvalue = cpu_to_le32(THIS->val);
%}
function little_endian8:long (val:long) %{ /* pure */
THIS->__retvalue = cpu_to_le64(THIS->val);
%}
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