mirror of
https://github.com/xen-project/xen.git
synced 2026-10-28 02:01:24 +01:00
Ian Campbell
1a4af67d32
The latter is GPL which makes the whole of mini-os GPL rather than BSD as intended. In tree users are all GPL or GPL-compatible but we should fix this so that mini-os is BSD. Do so by using the same BSD sys/queue.h as we use in libxl. Tested with the builtin mini-os test app and qemu stubdomain, both of which appear to still function as expected. Move tools/libxl/external and the associated sed script to tools/include/xen-external to allow more sensible access from mini-os. Also add s/NULL/0/ in the sed script due to NULL not always being defined in stubdom code when mini-os/wait.h is included. As well as the obvious ABI changes there are a few API updates associated with the change: - struct rw_semaphore.wait_list is unused - remove_waiter needs to take the wait_queue_head The latter requires a qemu update, so there is also a QEMU_TAG update in this changeset. I sprinkled some extra-emacs local variables around the files I edited which didn't have them. I think this should be backported to the stable branches since external users of mini-os may have been mislead into thinking they could safely link mini-os against GPL-incompatible code. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Committed-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
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.