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Chapter 17 -- 80386 Instruction Set
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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.
up:
Chapter 17 -- 80386 Instruction Set
prev: SHRD Double Precision Shift Right
next: SMSW Store Machine Status Word