sldt r/m16
LDTR -> r/m[16]
The Local Descriptor Table Register (LDTR) is stored by sldt as indicated by the effective address operand. LDTR is stored into the two-byte register or the memory location.
sldt is not used in application programs. It is used only in operating systems.
Store the LDTR in the effective address (addressed by the EBX register plus and offset of 5):
sldt 5(%ebx)