Software support layer for processors executing interpreted language applications

• US 20020099863A1
• Filed: 01/22/2001
• Published: 07/25/2002
• Est. Priority Date: 06/02/2000
• Status: Abandoned Application

• Current Assignee: ZW Company LLC
• Original Assignee: ZW Company LLC
• Inventors: Comeau, Guillaume, Deschenes, Vincent
• Application Number:
  US09/767,038
• Publication Number:
  US 20020099863A1
• Time in Patent Office: Days
• US Class Current: 719/310
• CPC Class Codes: G06F 9/45504 Abstract machines for programme code execution, e.g. Java virtual machine [JVM], interpreters, emulators
• CPC Class Codes: G06F 9/4812 by interrupt, e.g. masked

Abstract

An apparatus that supports processors executing interpreted language applications. A software support layer combined with a virtual machine provides a consistent programming view to application programmers across platforms. The support layer comprises functionality missing from the virtual machine, which when combined with the virtual machine, eliminates the need for an operating system.

Claims

1. A support machine comprising:

an interpreted computer-language virtual machine; and

a software support layer, coupled to the virtual machine, the software support layer further comprising;

a memory manager;

a file system manager; and

an interrupt manager.

2. The support machine of claim 1, wherein the interrupt manager further comprises:

a scheduler to schedule virtual machine threads based on their association with a given interrupt source.

3. The support machine of claim 2, wherein interrupt service routines are tied to the scheduled virtual machine threads.

4. The support machine of claim 3, wherein the support layer software is coupled to the virtual machine as a single binary image.

5. The support machine of claim 4, wherein the single binary image overlaps interrupt vectors of a target processor.

6. The support machine of claim 5, wherein the single binary image includes function calls to dynamically couple the virtual machine thread with the interrupt manager.

7. The support machine of claim 6, wherein the virtual machine is a Java virtual machine.

8. The support machine of claim 1, where the software support layer is compiled with the virtual machine into a single binary image that is statically linked between a interrupt vector table and the virtual machine.

9. The support machine of claim 1, wherein the file system manager supports files in computer-readable-memory.

10. The support machine of claim 9, wherein the files in computer-readable-memory store run-time property information.

11. The support machine of claim 1, wherein the file system manager supports files in a computer-readable-medium coupled to the support machine.

12. The support machine of claim 1, further comprising:

a boot loader, the boot loader comprising a first interrupt vector table overlapping with a second vector table, the first interrupt vector table and the second interrupt vector table containing elements, wherein the elements the first interrupt vector table points to functions in the software support layer.

13. The support machine of claim 12, wherein the boot loader further comprises a reset vector to launch the support layer and virtual machine or stay within a debug shell.

14. The support machine of claim 12, wherein the single binary image includes function calls to dynamically couple the virtual machine thread with the interrupt manager.

15. The support machine of claim 12, further comprising:

a memory to store byte-codes; and

a processor to executes the bytes codes as micro-instructions.

16. The support machine of claim 15, wherein the support machine is a wireless phone.

17. The support machine of claim 15, wherein the support machine is a personal digital assistant.

18. The support machine of claim 15, wherein the support machine is a personal computer.

20. The support machine of claim 19, wherein the means for managing system interrupts further comprises:

a scheduler to schedule virtual machine threads based on their association with a given interrupt source.

19. A support machine comprising:

means for interpreting a computer-language; and

means for managing memory, coupled to the means for interpreting the computer-language;

means for managing system files, coupled to the means for managing memory means for managing system interrupts, coupled to the means for managing system files.