L4Re Operating System Framework – Interface and Usage Documentation
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[detail level 123]
 IntroductionThe intention of this section is to provide a short overview about the L4Re Operating System Framework
 TutorialThis tutorial assumes that the reader is familiar with the basic L4 concepts that were discussed in the Introduction section
 Programming for L4ReThis part of the documentation discusses the concept of microkernel-based programming in more detail
 L4 Inter-Process Communication (IPC)Inter-process communication (IPC) is the fundamental communication mechanism in the L4Re Microkernel
 Capabilities and NamingThe L4Re system is a capability based system which uses and offers capabilities to implement fine-grained access control
 Spaces and MappingsEach task in the L4Re system has access to two resource spaces (three on IA32) which are maintained by the kernel
 Initial Environment and Application BootstrappingNew applications that are started by a loader conforming to L4Re get provided an Initial Environment
 Memory management - Data Spaces and the Region Map
 Program Input and OutputThe initial environment provides a Vcon capability used as the standard input/output stream
 Initial Memory Allocator and FactoryThe purpose of the memory allocator and of the factory is to provide the application with the means to allocate memory (in the form of data spaces) and kernel objects respectively
 Application and Server Building BlocksSo far we have discussed the environment of applications in which a single thread runs and which may invoke services provided through their initial objects
 Pthread SupportL4Re supports the standard pthread library functionality
 Interface Definition LanguageAn interface definition in L4Re is normally declared as a class derived from L4::Kobject_t
 L4Re Build SystemL4Re uses a custom make-based build system, often simply referred to as BID
 prog.mk - Application RoleThe prog role is used to build executable programs
 include.mk - Header File RoleThe header file role is responsible for installing header file at the appropriate location
 test.mk - Test Application RoleThe test role is very similar to the application role, it also builds an executable binary
 Kernel FactoryThe kernel factory is a kernel object that provides the ability to create new kernel objects dynamically
 L4Re ServersHere you shall find a quick overview over the standard services running on the L4Re Microkernel
 Sigma0, the Root-PagerSigma0 is a special L4 server that serves as the origin for mapping memory
 Moe, the Root-TaskMoe is the default root-task implementation for L4Re-based systems
 Ned, the Init ProcessNed's job is to bootstrap the system running on L4Re
 Io, the Io ServerThe Io server handles all platform devices and resources such as I/O memory, ports (on x86) and interrupts, and grants access to those to clients
 l4vio_net_p2p, a virtual network point-to-point linkThe virtual network point-to-point server (p2p) connects two clients with a virtual network connection
 Uvmm, the virtual machine monitorUvmm provides a virtual machine for running an unmodified guest in non-privileged mode
 RAM configuration
 NVMe server
 Mag, the GUI MultiplexerMag is the default multiplexer for graphics hardware
 Cons, the Console MultiplexerCons allows to multiplex console output from different L4 clients to different L4::Vcon-capable in/output servers
 AHCI driver
 Bootstrap, the L4 kernel bootstrapper
 Deprecated List