公开(公告)号：US12216922B2

公开(公告)日：2025-02-04

申请号：US17947072

申请日：2022-09-16

Applicant: Intel Corporation

Inventor： Hans G. Liljestrand ,  Sergej Deutsch ,  David M. Durham ,  Michael LeMay ,  Karanvir S. Grewal

IPC: G06F3/06 ,  H04L9/32

Abstract: A processor is to execute a first instruction to perform a simulated return in a program from a callee function to a caller function based on a first input stack pointer encoded with a first security context of a first callee stack frame. To perform the simulated return is to include generating a first simulated stack pointer to the caller stack frame. The processor is further to, in response to identifying an exception handler in the first caller function, execute a second instruction to perform a simulated call based on a second input stack pointer encoded with a second security context of the caller stack frame. To perform the simulated call is to include generating a second simulated stack pointer to a new stack frame containing an encrypted instruction pointer associated with the exception handler. The second simulated stack pointer is to be encoded with a new security context.

公开(公告)号：US20230018585A1

公开(公告)日：2023-01-19

申请号：US17947072

申请日：2022-09-16

Applicant: Intel Corporation

Inventor： Hans G. Liljestrand ,  Sergej Deutsch ,  David M. Durham ,  Michael LeMay ,  Karanvir S. Grewal

IPC: G06F3/06 ,  H04L9/32

Abstract: A processor is to execute a first instruction to perform a simulated return in a program from a callee function to a caller function based on a first input stack pointer encoded with a first security context of a first callee stack frame. To perform the simulated return is to include generating a first simulated stack pointer to the caller stack frame. The processor is further to, in response to identifying an exception handler in the first caller function, execute a second instruction to perform a simulated call based on a second input stack pointer encoded with a second security context of the caller stack frame. To perform the simulated call is to include generating a second simulated stack pointer to a new stack frame containing an encrypted instruction pointer associated with the exception handler. The second simulated stack pointer is to be encoded with a new security context.