diff options
Diffstat (limited to 'bootstub.mk')
| -rw-r--r-- | bootstub.mk | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/bootstub.mk b/bootstub.mk new file mode 100644 index 0000000..56adcfe --- /dev/null +++ b/bootstub.mk @@ -0,0 +1,60 @@ +CMDLINE_SIZE ?= 0x400 +BOOTSTUB_SIZE ?= 8192 + +BOOTSTUB_SRC_FILES := bootstub.c sfi.c ssp-uart.c imr_toc.c spi-uart.c +BOOTSTUB_SRC_FILES_x86 := head.S e820_bios.S + +ifeq ($(TARGET_IS_64_BIT),true) +BOOTSTUB_2ND_ARCH_VAR_PREFIX := $(TARGET_2ND_ARCH_VAR_PREFIX) +else +BOOTSTUB_2ND_ARCH_VAR_PREFIX := +endif + +LOCAL_SRC_FILES := $(BOOTSTUB_SRC_FILES) +LOCAL_SRC_FILES_x86 := $(BOOTSTUB_SRC_FILES_x86) +ANDROID_TOOLCHAIN_FLAGS := -m32 -ffreestanding +LOCAL_CFLAGS := $(ANDROID_TOOLCHAIN_FLAGS) -Wall -O1 -DCMDLINE_SIZE=${CMDLINE_SIZE} -DAOSP_HEADER_ADDRESS=$(BOOTSTUB_AOSP_HEADER_ADDRESS) $(BOOTSTUB_CFLAGS) +LOCAL_ASFLAGS := -DSTACK_OFFSET=$(BOOTSTUB_STACK_OFFSET) +LOCAL_C_INCLUDES = system/core/mkbootimg +LOCAL_MODULE := $(BOOTSTUB_BINARY).bin +LOCAL_MODULE_TAGS := optional +LOCAL_MULTILIB := 32 +LOCAL_MODULE_PATH := $(PRODUCT_OUT) +LOCAL_MODULE_CLASS := EXECUTABLES +LOCAL_FORCE_STATIC_EXECUTABLE := true +LOCAL_2ND_ARCH_VAR_PREFIX := $(BOOTSTUB_2ND_ARCH_VAR_PREFIX) + +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 := $(LOCAL_PATH)/2ndbootloader.lds +$(LOCAL_BUILT_MODULE) : BOOTSTUB_OBJS := $(patsubst %.c, %.o , $(LOCAL_SRC_FILES)) +$(LOCAL_BUILT_MODULE) : BOOTSTUB_OBJS += $(patsubst %.S, %.o , $(LOCAL_SRC_FILES_x86)) +$(LOCAL_BUILT_MODULE) : BOOTSTUB_OBJS := $(addprefix $(intermediates)/, $(BOOTSTUB_OBJS)) +$(LOCAL_BUILT_MODULE) : BOOTSTUB_ENTRY := $(BOOTSTUB_ENTRY) + +$(LOCAL_BUILT_MODULE): $(all_objects) + $(hide) mkdir -p $(dir $@) + @echo "Generating bootstub.bin: $@" + $(hide) $(TARGET_LD) \ + -m elf_i386 \ + -T $(PRIVATE_LINK_SCRIPT) --defsym=BOOTSTUB_ENTRY=$(BOOTSTUB_ENTRY) \ + $(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_full := $(PRODUCT_OUT)/$(BOOTSTUB_BINARY) +$(BOOTSTUB_BINARY)_CHECK_BOOTSTUB_SIZE : $(LOCAL_BUILT_MODULE) + $(hide) ACTUAL_SIZE=`$(call get-file-size,$<)`; \ + if [ "$$ACTUAL_SIZE" -gt "$(BOOTSTUB_SIZE)" ]; then \ + echo "$<: $$ACTUAL_SIZE exceeds size limit of $(BOOTSTUB_SIZE) bytes, aborting."; \ + exit 1; \ + fi + +$(bootstub_full) : $(LOCAL_BUILT_MODULE) $(BOOTSTUB_BINARY)_CHECK_BOOTSTUB_SIZE + @echo "Generating bootstub: $@" + $(hide) cat $< /dev/zero | dd bs=$(BOOTSTUB_SIZE) count=1 > $@ + |