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LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
# First compile bootstub.bin
CMDLINE_SIZE ?= 0x400
BOOTSTUB_SIZE ?= 4096
LOCAL_SRC_FILES := bootstub.c spi-uart.c head.S sfi.c e820_bios.S ssp-uart.c
ANDROID_TOOLCHAIN_FLAGS := -m32 -mno-android -ffreestanding
LOCAL_CFLAGS := $(ANDROID_TOOLCHAIN_FLAGS) -Wall -O1 -DCMDLINE_SIZE=${CMDLINE_SIZE}
LOCAL_MODULE := bootstub.bin
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE_PATH := $(PRODUCT_OUT)
LOCAL_MODULE_CLASS := EXECUTABLES
LOCAL_FORCE_STATIC_EXECUTABLE := true
include $(BUILD_SYSTEM)/binary.mk
$(LOCAL_INTERMEDIATE_TARGETS): PRIVATE_TARGET_GLOBAL_CFLAGS := $(LOCAL_CFLAGS)
$(LOCAL_BUILT_MODULE) : PRIVATE_ELF_FILE := $(intermediates)/$(PRIVATE_MODULE).elf
$(LOCAL_BUILT_MODULE) : PRIVATE_LINK_SCRIPT := $(LOCAL_PATH)/bootstub.lds
$(LOCAL_BUILT_MODULE) : BOOTSTUB_OBJS := $(patsubst %.c, %.o , $(LOCAL_SRC_FILES))
$(LOCAL_BUILT_MODULE) : BOOTSTUB_OBJS := $(patsubst %.S, %.o , $(BOOTSTUB_OBJS))
$(LOCAL_BUILT_MODULE) : BOOTSTUB_OBJS := $(addprefix $(intermediates)/, $(BOOTSTUB_OBJS))
$(LOCAL_BUILT_MODULE): $(all_objects)
@$(mkdir -p $(dir $@)
@echo "Generating bootstub.bin: $@"
$(hide) $(TARGET_LD) \
-m elf_i386 \
-T $(PRIVATE_LINK_SCRIPT) \
$(BOOTSTUB_OBJS) \
-o $(PRIVATE_ELF_FILE)
$(hide) $(TARGET_OBJCOPY) -O binary -R .note -R .comment -S $(PRIVATE_ELF_FILE) $@
# Then assemble the final bootstub file
bootstub_bin := $(PRODUCT_OUT)/bootstub.bin
bootstub_full := $(PRODUCT_OUT)/bootstub
CHECK_BOOTSTUB_SIZE : $(bootstub_bin)
$(hide) ACTUAL_SIZE=`$(call get-file-size,$(bootstub_bin))`; \
if [ "$$ACTUAL_SIZE" -gt "$(BOOTSTUB_SIZE)" ]; then \
echo "$(bootstub_bin): $$ACTUAL_SIZE exceeds size limit of $(BOOTSTUB_SIZE) bytes, aborting."; \
exit 1; \
fi
$(bootstub_full) : CHECK_BOOTSTUB_SIZE
@echo "Generating bootstub: $@"
$(hide) cat $(bootstub_bin) /dev/zero | dd bs=$(BOOTSTUB_SIZE) count=1 > $@
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