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, 5 insertions, 8 deletions

diff --git a/extras/mini-os/minios.mk b/extras/mini-os/minios.mk
index fa6f6bd0c9..078c396fc2 100644
--- a/extras/mini-os/minios.mk
+++ b/extras/mini-os/minios.mk
@@ -9,7 +9,7 @@ debug = y
 DEF_CFLAGS += -fno-builtin -Wall -Werror -Wredundant-decls -Wno-format
 DEF_CFLAGS += $(call cc-option,$(CC),-fno-stack-protector,)
 DEF_CFLAGS += -Wstrict-prototypes -Wnested-externs -Wpointer-arith -Winline
-DEF_CFLAGS += -D__XEN_INTERFACE_VERSION__=$(XEN_INTERFACE_VERSION)
+DEF_CPPFLAGS += -D__XEN_INTERFACE_VERSION__=$(XEN_INTERFACE_VERSION)
 
 DEF_ASFLAGS = -D__ASSEMBLY__
 DEF_LDFLAGS =
@@ -24,12 +24,10 @@ endif
 # DEF_... flags are the common mini-os flags,
 # ARCH_... flags may be defined in arch/$(TARGET_ARCH_FAM/rules.mk
 CFLAGS := $(DEF_CFLAGS) $(ARCH_CFLAGS)
+CPPFLAGS := $(DEF_CPPFLAGS) $(ARCH_CPPFLAGS)
 ASFLAGS := $(DEF_ASFLAGS) $(ARCH_ASFLAGS)
 LDFLAGS := $(DEF_LDFLAGS) $(ARCH_LDFLAGS)
 
-# The path pointing to the architecture specific header files.
-ARCH_INC := $(MINI-OS_ROOT)/include/$(TARGET_ARCH_FAM)
-
 # Special build dependencies.
 # Rebuild all after touching this/these file(s)
 EXTRA_DEPS = $(MINI-OS_ROOT)/minios.mk \
@@ -44,18 +42,17 @@ extra_heads := $(foreach dir,$(EXTRA_INC),$(wildcard $(dir)/*.h))
 HDRS += $(extra_heads)
 
 # Add the special header directories to the include paths.
-extra_incl := $(foreach dir,$(EXTRA_INC),-I$(MINI-OS_ROOT)/include/$(dir))
-override CPPFLAGS := -I$(MINI-OS_ROOT)/include $(CPPFLAGS) -I$(ARCH_INC)	$(extra_incl)
+override CPPFLAGS := $(CPPFLAGS) $(extra_incl)
 
 # The name of the architecture specific library.
 # This is on x86_32: libx86_32.a
 # $(ARCH_LIB) has to built in the architecture specific directory.
-ARCH_LIB_NAME = $(TARGET_ARCH)
+ARCH_LIB_NAME = $(XEN_TARGET_ARCH)
 ARCH_LIB := lib$(ARCH_LIB_NAME).a
 
 # This object contains the entrypoint for startup from Xen.
 # $(HEAD_ARCH_OBJ) has to be built in the architecture specific directory.
-HEAD_ARCH_OBJ := $(TARGET_ARCH).o
+HEAD_ARCH_OBJ := $(XEN_TARGET_ARCH).o
 HEAD_OBJ := $(TARGET_ARCH_DIR)/$(HEAD_ARCH_OBJ)