Caller protected stack return address in a hardware managed stack architecture

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United States of America Patent

PATENT NO 9891919
SERIAL NO

15443534

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Corruption of program stacks is detected by using guard words placed in the program stacks. A called routine executing on a processor checks a guard word in a stack of a calling routine. The checking determines whether the guard word has an expected value. Based on determining the guard word has an unexpected value, an indication of corruption of the stack is provided. Some routines, however, may not support use of guard words. Thus, routines that are interlinked may have differing protection capabilities. A determination is made as to the differing protection capabilities, an indication of the same is provided, and the routines are executed without failing due to the differing protection capabilities.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Duvalsaint, Karl J Lagrangeville, US 17 79
Gschwind, Michael K Chappaqua, US 523 8582
Salapura, Valentina Chappaqua, US 570 7597

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