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Data Export Experiment

Linking with and printing a data export from a library.

Note that a data export cannot be lazily linked like a function export can be.

Windows has supported dynamic linking of data exports since Windows NT 3.1 (the first Windows NT release), the same as for function exports.

See the glibc equivalent experiment.

Internal View

Windows dynamic linking uses fast RIP-relative addressing (although, MASM abstracts that information out of the disassembly):

0:000> uf exe_test!get_shared_variable_address
exe_test!get_shared_variable_address [C:\Users\user\Documents\data-export\exe-test.c @ 6]:
    6 00007ff7`8ba41000 48 8b 05 a9 21 00 00    mov     rax,qword ptr [exe_test!_imp_shared_variable (00007ff7`8ba431b0)]
    9 00007ff7`8ba41007 c3                      ret