xref: /linux/arch/x86/boot/compressed/Makefile (revision bec36eca6f5d1d83a9c3733fc40ba173ad849df2) 
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
22$(obj)/vmlinux: $(src)/vmlinux_$(BITS).lds $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/piggy.o FORCE
23	$(call if_changed,ld)
24	@:
25
26OBJCOPYFLAGS_vmlinux.bin :=  -R .comment -S
27$(obj)/vmlinux.bin: vmlinux FORCE
28	$(call if_changed,objcopy)
29
30
31targets += vmlinux.bin.all vmlinux.relocs relocs
32hostprogs-$(CONFIG_X86_32) += relocs
33
34quiet_cmd_relocs = RELOCS  $@
35      cmd_relocs = $(obj)/relocs $< > $@;$(obj)/relocs --abs-relocs $<
36$(obj)/vmlinux.relocs: vmlinux $(obj)/relocs FORCE
37	$(call if_changed,relocs)
38
39vmlinux.bin.all-y := $(obj)/vmlinux.bin
40vmlinux.bin.all-$(CONFIG_RELOCATABLE) += $(obj)/vmlinux.relocs
41quiet_cmd_relocbin = BUILD   $@
42      cmd_relocbin = cat $(filter-out FORCE,$^) > $@
43$(obj)/vmlinux.bin.all: $(vmlinux.bin.all-y) FORCE
44	$(call if_changed,relocbin)
45
46ifeq ($(CONFIG_X86_32),y)
47
48ifdef CONFIG_RELOCATABLE
49$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin.all FORCE
50	$(call if_changed,gzip)
51$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin.all FORCE
52	$(call if_changed,bzip2)
53$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin.all FORCE
54	$(call if_changed,lzma)
55else
56$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
57	$(call if_changed,gzip)
58$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
59	$(call if_changed,bzip2)
60$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
61	$(call if_changed,lzma)
62endif
63LDFLAGS_piggy.o := -r --format binary --oformat elf32-i386 -T
64
65else
66
67$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
68	$(call if_changed,gzip)
69$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
70	$(call if_changed,bzip2)
71$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
72	$(call if_changed,lzma)
73
74LDFLAGS_piggy.o := -r --format binary --oformat elf64-x86-64 -T
75endif
76
77suffix_$(CONFIG_KERNEL_GZIP)  = gz
78suffix_$(CONFIG_KERNEL_BZIP2) = bz2
79suffix_$(CONFIG_KERNEL_LZMA)  = lzma
80
81$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix_y) FORCE
82	$(call if_changed,ld)
83