PROCESSORS, METHODS, SYSTEMS, AND INSTRUCTIONS TO PROTECT SHADOW STACKS

摘要

A processor of an aspect includes a decode unit to decode an instruction. The processor also includes an execution unit coupled with the decode unit. The execution unit, in response to the instruction, is to determine that an attempted change due to the instruction, to a shadow stack pointer of a shadow stack, would cause the shadow stack pointer to exceed an allowed range. The execution unit is also to take an exception in response to determining that the attempted change to the shadow stack pointer would cause the shadow stack pointer to exceed the allowed range. Other processors, methods, systems, and instructions are disclosed.

主权项

1. A processor comprising:
a decode unit to decode an instruction; and an execution unit coupled with the decode unit, the execution unit, in response to the instruction, to:
determine that an attempted change due to the instruction, to a shadow stack pointer (SSP) of a shadow stack, would cause the SSP to exceed an allowed range; andtake an exception in response to determining that the attempted change to the SSP would cause the SSP to exceed the allowed range.