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WrmOS [39] is a real-time operating system based on L4 microkernel. It has own implementations of kernel, standard libraries, and network stack, supporting ARM, SPARC, x86, and x86-64 architectures. There is the paravirtualized Linux kernel (w4linux [40]) working on WrmOS. Helios is a microkernel inspired by seL4. [41]
Its kernel design guarantees bounded computing times by eliminating features such as dynamic memory allocation. The auditing and security engineering abilities have allowed it to obtain the Evaluation Assurance Level (EAL) 6 rating by the National Security Agency (NSA). [ 3 ]
TI-RTOS Kernel (SYS/BIOS) BSD: open source embedded: Mostly Texas Instruments: MSP430-432, C2000-5000-6000, TI's ARM families (Cortex M3-4F-R4-A8-A15), SimpleLink Wireless CC2xxx-CC3xxx TizenRT: Apache 2.0: open source: embedded: active: Transaction Processing Facility: Proprietary: mixed: general purpose: active: IBM Z series TRON project ...
Clear separation between user mode and supervisor (kernel) mode. Dynamic use of individually and separately built software components (executable program images and kernel modules) rather than a statically linked single monolithic image. Unix-like process name-space model (not memory model) and user shell program.
On single-processor systems, an application running in kernel mode and masking interrupts is the lowest overhead method to prevent simultaneous access to a shared resource. While interrupts are masked and the current task does not make a blocking OS call, the current task has exclusive use of the CPU since no other task or interrupt can take ...
Mode setting is a software operation that activates a display mode (screen resolution, color depth, and refresh rate) for a computer's display controller by using VESA BIOS Extensions or UEFI Graphics extensions (on more modern computers).
Several computer systems introduced in the 1960s, such as the IBM System/360, DEC PDP-6/PDP-10, the GE-600/Honeywell 6000 series, and the Burroughs B5000 series and B6500 series, support two CPU modes; a mode that grants full privileges to code running in that mode, and a mode that prevents direct access to input/output devices and some other hardware facilities to code running in that mode.
In computing, a loadable kernel module (LKM) is an object file that contains code to extend the running kernel, or so-called base kernel, of an operating system. LKMs are typically used to add support for new hardware (as device drivers ) and/or filesystems , or for adding system calls .