Hi All, In vmlinux dwarf debug info I can see this that was generacted by gcc DW_OP_breg6 (rbp): -52; DW_OP_deref_size: 4; DW_OP_breg6 (rbp): -56; DW_OP_deref_size: 4; DW_OP_GNU_convert <0x41f117f>; DW_OP_breg6 (rbp): -60; DW_OP_deref_size: 4; DW_OP_GNU_convert <0x41f117f>; DW_OP_div; DW_OP_GNU_convert <0x0>; DW_OP_mod I am not familiar with DW_OP_GNU_convert <0x0>; My feeling is that is convert this to an integer ? that should be zero. If so the question is, does generating a mod 0 is intentional ? Any help appreciated. There is still a possibilility that the convert don't give ZERO whin then would mean the MOD is ok. Cheers, Phi