1# 2# linux/arch/x86/boot/compressed/Makefile 3# 4# create a compressed vmlinux image from the original vmlinux 5# 6 7targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma head_$(BITS).o misc.o piggy.o 8 9KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2 10KBUILD_CFLAGS += -fno-strict-aliasing -fPIC 11KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING 12cflags-$(CONFIG_X86_64) := -mcmodel=small 13KBUILD_CFLAGS += $(cflags-y) 14KBUILD_CFLAGS += $(call cc-option,-ffreestanding) 15KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector) 16 17KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__ 18 19LDFLAGS := -m elf_$(UTS_MACHINE) 20LDFLAGS_vmlinux := -T 21 22hostprogs-y := mkpiggy 23 24$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/piggy.o FORCE 25 $(call if_changed,ld) 26 @: 27 28OBJCOPYFLAGS_vmlinux.bin := -R .comment -S 29$(obj)/vmlinux.bin: vmlinux FORCE 30 $(call if_changed,objcopy) 31 32 33targets += vmlinux.bin.all vmlinux.relocs relocs 34hostprogs-$(CONFIG_X86_NEED_RELOCS) += relocs 35 36quiet_cmd_relocs = RELOCS $@ 37 cmd_relocs = $(obj)/relocs $< > $@;$(obj)/relocs --abs-relocs $< 38$(obj)/vmlinux.relocs: vmlinux $(obj)/relocs FORCE 39 $(call if_changed,relocs) 40 41vmlinux.bin.all-y := $(obj)/vmlinux.bin 42vmlinux.bin.all-$(CONFIG_X86_NEED_RELOCS) += $(obj)/vmlinux.relocs 43 44$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE 45 $(call if_changed,gzip) 46$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE 47 $(call if_changed,bzip2) 48$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE 49 $(call if_changed,lzma) 50 51suffix-$(CONFIG_KERNEL_GZIP) := gz 52suffix-$(CONFIG_KERNEL_BZIP2) := bz2 53suffix-$(CONFIG_KERNEL_LZMA) := lzma 54 55quiet_cmd_mkpiggy = MKPIGGY $@ 56 cmd_mkpiggy = $(obj)/mkpiggy $< > $@ || ( rm -f $@ ; false ) 57 58targets += piggy.S 59$(obj)/piggy.S: $(obj)/vmlinux.bin.$(suffix-y) $(obj)/mkpiggy FORCE 60 $(call if_changed,mkpiggy) 61