System for execution context isolation in response to invoking a BIOS kernel function during a driver execution environment (DXE) phase of boot-up of a computer
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United States of America Patent
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Sep 10, 2013
Grant Date -
Dec 16, 2010
app pub date -
Oct 30, 2009
filing date -
Jun 13, 2009
priority date (Note) -
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Abstract
Execution context isolation during the DXE phase of computer start-up. Provision is made for referencing and dereferencing execution contexts and thereby providing execution isolation across contexts. In response to invoking a BIOS kernel function during a Driver Execution Environment (DXE) phase of a boot-up of the computer, the BIOS kernel associates a first processor context with the sequence of instructions, determines that scheduling the sequence of instructions requires a switch from a second processor context to the first processor context, performs a context switch action, during the DXE phase of the boot-up of the computer, to switch from the second processor context to the first processor context.
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