SLDT -- Store Local Descriptor Table Register

SLDT -- Store Local Descriptor Table Register Opcode Instruction Clocks Description 0F 00 /0 SLDT r/m16 pm=2/2 Store LDTR to EA word Operation r/m16 = LDTR; Description SLDT stores the Local Descriptor Table Register (LDTR) in the two-byte register or memory location indicated by the effective address operand. This register is a selector that points into the Global Descriptor Table. SLDT is used only in operating system software. It is not used in application programs. Flags Affected None Protected Mode Exceptions #GP(0) if the result is in a nonwritable segment; #GP(0) for an illegal memory operand effective address in the CS, DS, ES, FS, or GS segments; #SS(0) for an illegal address in the SS segment; #PF(fault-code) for a page fault Real Address Mode Exceptions Interrupt 6; SLDT is not recognized in Real Address Mode Virtual 8086 Mode Exceptions Same exceptions as in Real Address Mode; #PF(fault-code) for a page fault Notes The operand-size attribute has no effect on the operation of the instruction.