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Vol. 2A 3-533
INSTRUCTION SET REFERENCE, A-M
LDS/LES/LFS/LGS/LSS—Load Far Pointer
#SS If a memory operand effective address is outside the SS
segment limit.
#UD If source operand is not a memory location.
If the LOCK prefix is used.
Virtual-8086 Mode Exceptions
#UD If source operand is not a memory location.
If the LOCK prefix is used.
#GP(0) If a memory operand effective address is outside the CS, DS,
ES, FS, or GS segment limit.
#SS(0) If a memory operand effective address is outside the SS
segment limit.
#PF(fault-code) If a page fault occurs.
#AC(0) If alignment checking is enabled and an unaligned memory
reference is made.
Compatibility Mode Exceptions
Same exceptions as in protected mode.
64-Bit Mode Exceptions
#GP(0) If the memory address is in a non-canonical form.
If a NULL selector is attempted to be loaded into the SS register
in compatibility mode.
If a NULL selector is attempted to be loaded into the SS register
in CPL3 and 64-bit mode.
If a NULL selector is attempted to be loaded into the SS register
in non-CPL3 and 64-bit mode where its RPL is not equal to CPL.
#GP(Selector) If the 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 memory
address of the descriptor is non-canonical, 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.
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 memory address of the descriptor is non-canonical,
the segment selector RPL is not equal to CPL, the segment is a
nonwritable data segment, or DPL is not equal to CPL.
#SS(0) If a memory operand effective address is non-canonical
#SS(Selector) If the SS register is being loaded and the segment is marked not
present.