Patents by Inventor Jirí Kosina

Jirí Kosina has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Runtime patching of an operating system (OS) without stopping execution
    Patent number: 9652221
    Abstract: Techniques for runtime patching of an OS without stopping execution of the OS are presented. When a patch function is needed, it is loaded into the OS code. Threads of the OS that are in kernel mode have a flag set and a jump is inserted at a location of an old function. When the old function is accessed, the jump uses a trampoline to check the flag, if the flag is set, processing returns to the old function; otherwise processing jumps to a given location of the patch. Flags are unset when exiting or entering the kernel mode.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: May 16, 2017
    Assignee: Micro Focus Software Inc.
    Inventors: Vojtech Pavlik, Jiri Kosina
  • RUNTIME PATCHING OF AN OPERATING SYSTEM (OS) WITHOUT STOPPING EXECUTION
    Publication number: 20160019055
    Abstract: Techniques for runtime patching of an OS without stopping execution of the OS are presented. When a patch function is needed, it is loaded into the OS code. Threads of the OS that are in kernel mode have a flag set and a jump is inserted at a location of an old function. When the old function is accessed, the jump uses a trampoline to check the flag, if the flag is set, processing returns to the old function; otherwise processing jumps to a given location of the patch. Flags are unset when exiting or entering the kernel mode.
    Type: Application
    Filed: September 28, 2015
    Publication date: January 21, 2016
    Inventors: Vojtech Pavlík, Jirí Kosina
  • Runtime patching of an operating system (OS) without stopping execution
    Patent number: 9170803
    Abstract: Techniques for runtime patching of an OS without stopping execution of the OS are presented. When a patch function is needed, it is loaded into the OS code. Threads of the OS that are in kernel mode have a flag set and a jump is inserted at a location of an old function. When the old function is accessed, the jump uses a trampoline to check the flag, if the flag is set, processing returns to the old function; otherwise processing jumps to a given location of the patch. Flags are unset when exiting or entering the kernel mode.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: October 27, 2015
    Assignee: Novell, Inc.
    Inventors: Vojtech Pavlik, Jirí Kosina
  • RUNTIME PATCHING OF AN OPERATING SYSTEM (OS) WITHOUT STOPPING EXECUTION
    Publication number: 20150178071
    Abstract: Techniques for runtime patching of an OS without stopping execution of the OS are presented. When a patch function is needed, it is loaded into the OS code. Threads of the OS that are in kernel mode have a flag set and a jump is inserted at a location of an old function. When the old function is accessed, the jump uses a trampoline to check the flag, if the flag is set, processing returns to the old function; otherwise processing jumps to a given location of the patch. Flags are unset when exiting or entering the kernel mode.
    Type: Application
    Filed: December 19, 2013
    Publication date: June 25, 2015
    Applicant: Novell, Inc.
    Inventors: Vojtech Pavlík, Jirí Kosina