Patents by Inventor Daniel R. K. Ports

Daniel R. K. Ports 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).

  • Transparent memory-mapped emulation of I/O calls
    Patent number: 9658878
    Abstract: A virtual-machine-based system provides a mechanism to implement application file I/O operations of protected data by implementing the I/O operations semantics in a shim layer with memory-mapped regions. The semantics of these I/O operations are emulated in a shim layer with memory-mapped regions by using a mapping between a process' address space and a file or shared memory object. Data that is protected from viewing by a guest OS running in a virtual machine may nonetheless be accessed by the process.
    Type: Grant
    Filed: August 25, 2014
    Date of Patent: May 23, 2017
    Assignee: VMware, Inc.
    Inventors: Daniel R. K. Ports, Xiaoxin Chen, Carl A. Waldspurger, Pratap Subrahmanyam, Tal Garfinkel
  • TRANSPARENT MEMORY-MAPPED EMULATION OF I/O CALLS
    Publication number: 20150046924
    Abstract: A virtual-machine-based system provides a mechanism to implement application file I/O operations of protected data by implementing the I/O operations semantics in a shim layer with memory-mapped regions. The semantics of these I/O operations are emulated in a shim layer with memory-mapped regions by using a mapping between a process' address space and a file or shared memory object. Data that is protected from viewing by a guest OS running in a virtual machine may nonetheless be accessed by the process.
    Type: Application
    Filed: August 25, 2014
    Publication date: February 12, 2015
    Inventors: Daniel R.K. PORTS, Xiaoxin CHEN, Carl A. WALDSPURGER, Pratap SUBRAHMANYAM, Tal GARFINKEL
  • Transparent memory-mapped emulation of I/O calls
    Patent number: 8819676
    Abstract: A virtual-machine-based system provides a mechanism to implement application file I/O operations of protected data by implementing the I/O operations semantics in a shim layer with memory-mapped regions. The semantics of these I/O operations are emulated in a shim layer with memory-mapped regions by using a mapping between a process' address space and a file or shared memory object. Data that is protected from viewing by a guest OS running in a virtual machine may nonetheless be accessed by the process.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: August 26, 2014
    Assignee: VMware, Inc.
    Inventors: Daniel R. K. Ports, Xiaoxin Chen, Carl A. Waldspurger, Pratap Subrahmanyam, Tal Garfinkel
  • Transparent VMM-assisted user-mode execution control transfer
    Patent number: 8261265
    Abstract: A virtual-machine-based system provides a control-transfer mechanism to invoke a user-mode application handler from existing virtual hardware directly, without going through an operating system kernel running in the virtual machine. A virtual machine monitor calls directly to the guest user-mode handler and the handler transfers control back to the virtual machine monitor, without involving the guest operating system.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: September 4, 2012
    Assignee: VMware, Inc.
    Inventors: Xiaoxin Chen, Carl A. Waldspurger, Pratap Subrahmanyam, Tal Garfinkel, Daniel R. K. Ports
  • Transparent Memory-Mapped Emulation of I/O Calls
    Publication number: 20090113425
    Abstract: A virtual-machine-based system provides a mechanism to implement application file I/O operations of protected data by implementing the I/O operations semantics in a shim layer with memory-mapped regions. The semantics of these I/O operations are emulated in a shim layer with memory-mapped regions by using a mapping between a process' address space and a file or shared memory object. Data that is protected from viewing by a guest OS running in a virtual machine may nonetheless be accessed by the process.
    Type: Application
    Filed: October 30, 2008
    Publication date: April 30, 2009
    Applicant: VMWARE, INC.
    Inventors: Daniel R. K. PORTS, Xiaoxin CHEN, Carl A. WALDSPURGER, Pratap SUBRAHMANYAM, Tal GARFINKEL
  • Transparent VMM-Assisted User-Mode Execution Control Transfer
    Publication number: 20090113424
    Abstract: A virtual-machine-based system provides a control-transfer mechanism to invoke a user-mode application handler from existing virtual hardware directly, without going through an operating system kernel running in the virtual machine. A virtual machine monitor calls directly to the guest user-mode handler and the handler transfers control back to the virtual machine monitor, without involving the guest operating system.
    Type: Application
    Filed: October 30, 2008
    Publication date: April 30, 2009
    Applicant: VMWARE, INC.
    Inventors: Xiaoxin CHEN, Carl A. WALDSPURGER, Pratap SUBRAHMANYAM, Tal GARFINKEL, Daniel R. K. PORTS