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INSTRUCTION SET REFERENCE
LDS/LES/LFS/LGS/LSSLoad Far Pointer (Continued)
Flags Affected
None.
Protected Mode Exceptions
#UD
If source operand is not a memory location.
#GP(0)
If a null selector is loaded into the SS register.
If a memory operand effective address is outside the CS, DS, ES, FS, or
GS segment limit.
If the DS, ES, FS, or GS register is used to access memory and it contains
a null segment selector.
#GP(selector)If the SS register is being loaded and any of the following is true: the
segment selector index is not within the descriptor table limits, the
segment selector RPL is not equal to CPL, the segment is a nonwritable
data segment, or DPL is not equal to CPL.
If the DS, ES, FS, or GS register is being loaded with a non-null segment
selector and any of the following is true: the segment selector index is not
within descriptor table limits, the segment is neither a data nor a readable
code segment, or the segment is a data or nonconforming-code segment
and both RPL and CPL are greater than DPL.
#SS(0)
If a memory operand effective address is outside the SS segment limit.
#SS(selector)If the SS register is being loaded and the segment is marked not present.
#NP(selector)If DS, ES, FS, or GS register is being loaded with a non-null segment
selector and the segment is marked not present.
#PF(fault-code)If a page fault occurs.
#AC(0)
If alignment checking is enabled and an unaligned memory reference is
made while the current privilege level is 3.
Real-Address Mode Exceptions
#GP
If a memory operand effective address is outside the CS, DS, ES, FS, or
GS segment limit.
#SS
If a memory operand effective address is outside the SS segment limit.
#UD
If source operand is not a memory location.
