US 10,761,867 B2Granted

Nested emulation and dynamic linking environment

AssigneeIntel Corporation

InventorsXueliang Zhong, Jianhui Li, Jian Ping Chen, Tingtao Li, Yong Wu, Wen Tan, Xiao Dong Lin

Life of this patent

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Abstract

Various embodiments include nested emulation for a source application and source emulator. Duplicate source ISA libraries redirect the source emulator library calls to a target library, thereby forcing the native emulator through proper emulation channels between first and second ISAs. Other embodiments concern accelerating dynamic linking by determining certain function calls that, rather than being processed through emulation of PLT code, are instead directly called without the need for PLT code translation. Some embodiments address both nested emulation and accelerated dynamic linking but other embodiments include one of nested emulation and accelerated dynamic linking. Other embodiments are described herein.

Claims20

Dependent claims

At least one non-transitory machine-readable medium having stored thereon data which, when used by at least one machine, causes the at least one machine to perform operations comprising:

loading an application, the application being formatted based on a source instruction set architecture (ISA);
redirecting a first call to a first library so the call does not reach a source ISA library;
directing the first call from the first library to a library service of a target ISA library;
replacing a second call with a third call;
and
emulating the application via the target ISA library and an operating system (OS);
wherein:
the first call is to a library service of the source ISA library;
the second call is to an additional library service;
the second call is directed to code configured to locate a procedure;
the third call is to one of the source ISA library or an additional source ISA library;
the third call is to bypass the code configured to locate the procedure;
and
the OS is formatted based on a target ISA, the target ISA corresponding to the target ISA library.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/843,822Filed 15 Dec 2017 · continuation
Published: US 2018/0173545 A121 Jun 2018
Granted: 1 Sep 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G06F 9/455
Arrangements for executing specific programs: emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or…
G06F 9/4552
Runtime code conversion or optimisation: involving translation to a different instruction set architecture, e.g. just-in-time translation in a JVM
G06F 9/44521
Program loading or initiating: dynamic linking or loading; Link editing at or after load time, e.g. Java class loading
G06F
Computing and data processing

Family

PCT/CN2012/072770Parent of this continuation · filed 22 Mar 2012
US 2018/0173545 A1Pre-grant publication · published 21 Jun 2018
Application13/994,725Parent of this continuation
US 9,851,987 B2Parent of this continuation
US 2013/0338993 A1Published application
US 10,761,867 B2This patent

From the US filing history. Foreign family members aren’t listed.