UPDATING ENCRYPTED SECURITY CONTEXT IN STACK POINTERS FOR EXCEPTION HANDLING AND TIGHT BOUNDING OF ON-STACK ARGUMENTS
| Registre | Brevet USPTO |
|---|---|
| Numéro d'application | 17947072 |
| Statut | En instance |
| Date de dépôt | 2022-09-16 |
| Date de la première publication | 2023-01-19 |
| Date de publication | 2023-01-19 |
| Propriétaire | Intel Corporation (USA) |
| Inventeur(s) |
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Abrégé
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.