_GetDescriptor

include vmm.inc

VMMCall _GetDescriptor, <Selector, VM, flags>

mov     ecx, eax                ; zero in eax and edx if error
or      ecx, edx
jz      error

mov     [DescDWORD1], edx       ; high doubleword of descriptor
mov     [DescDWORD2], eax       ; low doubleword of descriptor
 

Retrieves a copy of the descriptor associated with the given LDT or GDT selector. Uses EAX, ECX, EDX, and Flags.

• Returns the low-order doubleword of the descriptor in the EAX register and the high-order doubleword in the EDX register. Both registers contain zero if an error occurs.

Selector

GDT or LDT selector.

VM

Handle of the virtual machine to which the specified LDT selector belongs. This parameter is ignored if the Selector parameter is a GDT selector.

flags

Operation flags. Must be 0.

This service ignores the high 16-bits of the Selector parameter; the 80386 CPU often sets these bits to random values when doubleword operations are performed on segment registers.

This service ignores the RPL bits of the selector.

See Also

_BuildDescriptorDWORDs, _SetDescriptor