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Minimal OS
This shows some of the stuff that any guest OS will have to set up.
This includes:
* installing a virtual exception table
* handling virtual exceptions
* handling asynchronous events
* enabling/disabling async events
* parsing start_info struct at start-of-day
* registering virtual interrupt handlers (for timer interrupts)
* a simple page and memory allocator
* minimal libc support
* minimal Copy-on-Write support
* network, block, framebuffer support
* transparent access to FileSystem exports (see tools/fs-back)
- to build it just type make.
- to build it with TCP/IP support, download LWIP 1.3 source code and type
make LWIPDIR=/path/to/lwip/source
- to build it with much better libc support, see the stubdom/ directory
- to start it do the following in domain0 (assuming xend is running)
# xm create domain_config
This starts the kernel and prints out a bunch of stuff and then once every
second the system time.
If you have setup a disk in the config file (e.g.
disk = [ 'file:/tmp/foo,hda,r' ] ), it will loop reading it. If that disk is
writable (e.g. disk = [ 'file:/tmp/foo,hda,w' ] ), it will write data patterns
and re-read them.
If you have setup a network in the config file (e.g. vif = [''] ), it will
print incoming packets.
If you have setup a VFB in the config file (e.g. vfb = ['type=sdl'] ), it will
show a mouse with which you can draw color squares.
If you have compiled it with TCP/IP support, it will run a daytime server on
TCP port 13.