Apple Inc.

Andrew H Lin

Chun-Yao Huang

Sunggu Kang

Lei Yuan

Jungmin Lee

Graham Butler Myhre

James E Pedder

Steven E Molesa

John D Pape

Ivan Knez

Deepankar Duggal

Giovanni Carbone

Cheuk Chi Lo

Chun-Ming Tang

Christopher M Tsay

Jaein Choi

Michael Slootsky

Hairong Tang

Hitoshi Yamamoto

Kwang Ohk Cheon

Wendi Chang

Gloria Wong

KiBeom Kim

EnkhAmgalan Dorjgotov

Corey C Stappenbeck

Cheng Chen

Rni Liu

In an embodiment, a processor includes hardware circuitry which may be used to authenticate instruction operands. The processor may execute instructions that perform operand authentication both speculatively and non-speculatively. During speculative execution of such instructions, the processor may execute authentication such that no differences in observable state of the processor, relative to authentication result, are detectable via a side channel. During speculative execution, a result of authentication may be deferred until speculative execution of the instruction, and additional instructions, may be completed. Upon resolution of a condition that indicates acceptance of the speculative execution, a speculative execution result may cause a processor exception and stalling of execution at the instruction to be performed.

Consistent speculation of pointer authentication

Growing community of inventors

Mountain View, CA, United States of America

Andrew H Lin