Refactor crossystem to move x86-specific implementation to its own file.

host/Makefile

 # Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 HOSTTOP := $(shell pwd)
 TESTDIR = $(HOSTTOP)/linktest
 BUILD_ROOT := ${BUILD}/$(shell basename ${HOSTTOP})
 
 INCLUDES += \
         -I$(HOSTTOP)/include \
+        -I$(HOSTTOP)/arch/$(ARCH)/include \
         -I$(FWDIR)/lib/include \
         -I$(FWDIR)/lib/cgptlib/include \
         -I$(FWDIR)/lib/cryptolib/include
 
 # find ./lib -iname '*.c' | sort
 LIB_SRCS = \
+        ./arch/$(ARCH)/lib/crossystem_arch.c \
         ./lib/crossystem.c \
         ./lib/file_keys.c \
         ./lib/fmap.c \
         ./lib/host_common.c \
         ./lib/host_key.c \
         ./lib/host_keyblock.c \
         ./lib/host_misc.c \
         ./lib/host_signature.c \
         ./lib/signature_digest.c
 
 STUB_SRCS = \
         ../firmware/stub/boot_device_stub.c \
         ../firmware/stub/load_firmware_stub.c \
         ../firmware/stub/tpm_lite_stub.c \
         ../firmware/stub/utility_stub.c
 
 ALL_SRCS = ${LIB_SRCS} ${STUB_SRCS}
 
 test : $(HOSTLIB)
         $(CC) $(CFLAGS) $(INCLUDES) -o $(BUILD_ROOT)/a.out $(TESTDIR)/main.c \
         $(HOSTLIB) -lcrypto
 
 include ../common.mk
 
 $(HOSTLIB) : $(ALL_OBJS) $(FWLIB)
         rm -rf $@ $(BUILD_ROOT)/.tmp
         mkdir -p $(BUILD_ROOT)/.tmp
         cd $(BUILD_ROOT)/.tmp ; ar x $(FWLIB)
         ar qc $@ $^ $(BUILD_ROOT)/.tmp/*.o