Intel 64 and IA-32 Architectures Software Developers Manual Volume 2B, Instruction Set Reference, N-Z

Vol. 2B 4-139
INSTRUCTION SET REFERENCE, N-Z
Virtual-8086 Mode Exceptions
#GP(0) If the I/O privilege level is less than 3.
If an attempt is made to execute the POPF/POPFD instruction
with an operand-size override prefix.
#SS(0) If the top of stack is not within the stack segment.
#PF(fault-code) If a page fault occurs.
#AC(0) If an unaligned memory reference is made while alignment
checking is enabled.
Compatibility Mode Exceptions
Same as for protected mode exceptions.
64-Bit Mode Exceptions
#GP(0) If the memory address is in a non-canonical form.
#SS(0) If the stack address is in a non-canonical form.
#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.