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include vmm.inc
 
VMMcall _SelectorMapFlat, <VM, Selector, flags>
 
cmp     eax, 0FFFFFFFFh         ; 0FFFFFFFFh if error
je      error
mov     [Address], eax          ; base address of selector
 
The _SelectorMapFlat service returns the base address of the specified GDT
or LDT selector. The address mapper uses this service to convert pointers,
consisting of selector and offset pairs, to flat-model linear addresses
suitable for use as parameters for the _LinMapIntoV86 service.
 
Parameter  Description
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VM         Specifies a handle identifying the virtual machine to which the
           specified selector belongs. This parameter is not used if
           Selector is a GDT selector. This parameter must be valid for LDT
           selectors.
 
Selector   Specifies a GDT or LDT selector.
 
flags      Specifies the operation flags. This parameter must be set to 0.
 
Return Value
 
The EAX register contains the linear address of the base of the selector if
the service is successful. Otherwise, EAX contains 0FFFFFFFFh to indicate an
error, such as an invalid selector.
 
Comments
 
This service ignores the high 16 bits of the Selector parameter; the 80386
CPU often sets these bits to somewhat random values when doubleword
operations are performed on segment registers.
 
Uses
 
EAX
 
See Also
 
_LinMapIntoV86
 
 
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