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

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