4.3 Get Service Tables
UEFI Application may consume the UEFI Boot Services, UEFI Runtime Services and UEFI System Table.
Refer to UEFI Specification for definitions and detailed descriptions of UEFI Boot Services, UEFI Runtime Services, and UEFI System Table.
EDK II provides UefiBootServicesTableLib, UefiBootServicesTableLib and
UefiRuntimeServicesTableLib to facilitate developer in accessing those services. The following table lists the global symbol provided by those libraries.

Table 8 Global Symbol can be used by UEFI Application

Global Variable
Library Class
UEFI System Table
gST
UefiBootServicesTableLib
UEFI Boot Services Table
gBS
UefiBootServicesTableLib
UEFI Runtime Services Table
gRT
UefiRuntimeServicesTableLib
Last modified 1yr ago