INTEGRITY PC Integrates Linux and Legacy Software into Secure Systems

11/30/2004 - Green Hills Software, Inc., the market leader in safety-critical and royalty-free Real-Time Operating Systems (RTOS), announced the immediate availability of INTEGRITY® PC, an extension to the company’s INTEGRITY operating system that enables the incorporation of legacy applications and traditional operating systems, such as Linux, into high-security and high-reliability applications.

Boeing is using INTEGRITY PC to take advantage of existing Linux-based software. With INTEGRITY PC, Boeing engineers did not have to port their Linux code to a secure operating system and they can easily incorporate updates to the Linux-based code.

INTEGRITY PC integrates the INTEGRITY operating system with Green Hills Software’s new Padded CellTM secure virtualization technology. The Padded Cell technology implements a “virtual computer” in a user-mode application running on top of the INTEGRITY operating system. Multiple Padded Cell applications can run concurrently on a single physical computer, each hosting its own guest operating system. An impenetrable wall around each virtual computer ensures that errant, insecure or malicious code can never compromise the security or reliability of the rest of the system—either inadvertently or via a hostile attack.

“Like a padded cell, INTEGRITY PC prevents Linux, non-memory-protected operating systems such as Wind River’s legacy VxWorks, and other insecure and unreliable software from harming the rest of a system while also limiting the harm it can do to itself,” explained Dan O’Dowd, founder and chief executive officer of Green Hills Software. “For years, the INTEGRITY operating system has lead the market for security-critical and safety-critical applications, including leading-edge avionics and defense applications. Now, with INTEGRITY PC, users of enterprise operating systems can upgrade to a secure foundation without having to re-implement their existing applications. Legacy operating systems and applications can safely co-exist with totally reliable and security-critical applications running natively under the INTEGRITY operating system.”

Key Features and Problems Solved
Key features and security threats addressed by INTEGRITY PC include:

Flexible Interfaces

INTEGRITY PC running on PowerPC processors with support for Linux as a guest operating system is available today. Please contact Green Hills Software for availability information for other target processors and guest operating systems.

About Green Hills Software
Founded in 1982, Green Hills Software, Inc. is the technology leader for real-time operating systems and software development tools for 32- and 64-bit embedded systems. Our royalty-free INTEGRITY RTOS, velOSity microkernel, compilers, MULTI and AdaMULTI Integrated Development Environments and TimeMachine debugger, offer a complete development solution that addresses both deeply embedded and high-reliability applications. Green Hills Software is headquartered in Santa Barbara, CA, with European headquarters in the United Kingdom. Visit Green Hills Software on the web at

Green Hills Software, the Green Hills logo, MULTI, INTEGRITY, velOSity, AdaMULTI, TimeMachine, Padded Cell, Integrate and EventAnalyzer are trademarks or registered trademarks of Green Hills Software, Inc. in the U.S. and/or internationally. POSIX is a registered trademark and 1003.1 is a trademark of the Institute of Electrical and Electronic Engineers, Inc.

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