公开(公告)号：US20220138313A1

公开(公告)日：2022-05-05

申请号：US17348576

申请日：2021-06-15

Applicant: Apple Inc.

Inventor： Filip J. Pizlo ,  Michael L. Saboff ,  Bernard J. Semeria ,  Jacques Fortier ,  Ivan Krstic ,  Yusuke Suzuki ,  Saam J. Barati ,  Yin Zin Mark Lam

IPC: G06F21/53

Abstract: In an embodiment, dynamically-generated code may be supported in the system by ensuring that the code either remains executing within a predefined region of memory or exits to one of a set of valid exit addresses. Software embodiments are described in which the dynamically-generated code is scanned prior to permitting execution of the dynamically-generated code to ensure that various criteria are met including exclusion of certain disallowed instructions and control of branch target addresses. Hardware embodiments are described in which the dynamically-generated code is permitted to executed but is monitored to ensure that the execution criteria are met.

公开(公告)号：US11709675B2

公开(公告)日：2023-07-25

申请号：US17348576

申请日：2021-06-15

Applicant: Apple Inc.

Inventor： Filip J. Pizlo ,  Michael L. Saboff ,  Bernard J. Semeria ,  Jacques Fortier ,  Ivan Krstić ,  Yusuke Suzuki ,  Saam J. Barati ,  Yin Zin Mark Lam

IPC: G06F21/00 ,  G06F9/30 ,  G06F9/455 ,  H04L9/08 ,  G06F21/53

CPC classification number: G06F9/30054 ,  G06F9/45516 ,  G06F21/53 ,  H04L9/0894 ,  G06F2221/033

Abstract: In an embodiment, dynamically-generated code may be supported in the system by ensuring that the code either remains executing within a predefined region of memory or exits to one of a set of valid exit addresses. Software embodiments are described in which the dynamically-generated code is scanned prior to permitting execution of the dynamically-generated code to ensure that various criteria are met including exclusion of certain disallowed instructions and control of branch target addresses. Hardware embodiments are described in which the dynamically-generated code is permitted to executed but is monitored to ensure that the execution criteria are met.