Add stubdomain support. See stubdom/README for usage details.

- Move PAGE_SIZE and STACK_SIZE into __PAGE_SIZE and __STACK_SIZE in
  arch_limits.h so as to permit getting them from there without
  pulling all the internal Mini-OS defines.
- Setup a xen-elf cross-compilation environment in stubdom/cross-root
- Add a POSIX layer on top of Mini-OS by linking against the newlib C
  library and lwIP, and implementing the Unixish part in mini-os/lib/sys.c
- Cross-compile zlib and libpci too.
- Add an xs.h-compatible layer on top of Mini-OS' xenbus.
- Cross-compile libxc with an additional xc_minios.c and a few things
  disabled.
- Cross-compile ioemu with an additional block-vbd, but without sound,
  tpm and other details.  A few hacks are needed:
  - Align ide and scsi buffers at least on sector size to permit
  direct transmission to the block backend. While we are at it, just
  page-align it to possibly save a segment. Also, limit the scsi
  buffer size because of limitations of the block paravirtualization
  protocol.
  - Allocate big tables dynamically rather that letting them go to
  bss: when Mini-OS gets installed in memory, bss is not lazily
  allocated, and doing so during Mini-OS is unnecessarily trick while
  we can simply use malloc.
- Had to change the Mini-OS compilation somehow, so as to export
  Mini-OS compilation flags to the Makefiles of libxc and ioemu.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/extras/mini-os/include/mm.h b/extras/mini-os/include/mm.h
index 4319fa2640..8396ec6b31 100644
--- a/extras/mini-os/include/mm.h
+++ b/extras/mini-os/include/mm.h
@@ -36,8 +36,13 @@
 #endif
 
 #include <lib.h>
+
+#include <arch_limits.h>
 #include <arch_mm.h>
 
+#define STACK_SIZE_PAGE_ORDER __STACK_SIZE_PAGE_ORDER
+#define STACK_SIZE __STACK_SIZE
+
 
 void init_mm(void);
 unsigned long alloc_pages(int order);
@@ -61,5 +66,8 @@ void arch_init_p2m(unsigned long max_pfn_p);
 void *map_frames_ex(unsigned long *f, unsigned long n, unsigned long stride,
 	unsigned long increment, unsigned long alignment, domid_t id,
 	int may_fail, unsigned long prot);
+#ifdef HAVE_LIBC
+extern unsigned long heap, brk, heap_mapped, heap_end;
+#endif
 
 #endif /* _MM_H_ */