User Application Binaries

Although user applications use private address spaces, they are also built as relocatable binaries. This simplifies the building of supervisor and user applications. Unlike supervisor applications, user applications trap to the system to access system services.

User applications built as relocatable binaries can run in either VIRTUAL_ADDRESS_SPACE or in non-virtual address space (flat memory). If they were relocated on the host, these binaries cannot run in flat memory mode, which does not support private address spaces.

Although it is possible to relocate user applications on the host, the ChorusOS operating system provides no specific tools to achieve this.

The link address (relocatable) of the user applications and the size of the user address space are board-dependent. User applications are also linked dynamically prior to loading.