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Providing exception stack management using stack panic fault exceptions in processor-based devices

專(zhuān)利號(hào)
US11175926B2
公開(kāi)日期
2021-11-16
申請(qǐng)人
Microsoft Technology Licensing, LLC(US WA Redmond)
發(fā)明人
Thomas Andrew Sartorius; Michael Scott McIlvaine; James Norris Dieffenderfer; Aaron S. Giles
IPC分類(lèi)
G06F9/38; G06F9/30; G06F11/07
技術(shù)領(lǐng)域
exception,panic,stack,fault,handler,processor,store,device,in,registers
地域: WA WA Redmond

摘要

Providing exception stack management using stack panic fault exceptions in processor-based devices is disclosed. In this regard, a processor device defines a “stack panic fault exception” that may be raised upon execution of an exception handler store operation attempting to write state data into an exception stack, and provides a dedicated plurality of stack panic fault exception state registers in which stack panic fault exception state data may be saved. Upon detecting a first exception, the processor device transfers program control to an exception handler for the first exception. If a second exception occurs upon execution of a store operation in the exception handler, the processor device determines that the second exception should be handled as a stack panic fault exception, saves the stack panic fault exception state data in the stack panic fault exception state registers, and transfers program control to a stack panic fault exception handler.

說(shuō)明書(shū)

Finally, the store instruction 310 of FIG. 3C, like the store instruction 304 of FIG. 3B, comprises a conventional opcode 312. The store instruction 310, though, also comprises a custom operand 314 that indicates to the processor device 102 that the store instruction 310 is stack-panic-fault-enabled. Thus, the processor device 102 may determine that an exception arising from execution of the store instruction 310 should be handled as a stack panic fault exception based on determining that the store instruction 310 comprises the custom operand 314.

權(quán)利要求

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