mirror of
https://github.com/torvalds/linux.git
synced 2024-12-22 02:52:56 +00:00
02a884c0fe
Determine the compressed code offset (from the kernel runtime address) at compile time. This allows some minor optimizations in arch/x86/boot/compressed/head_*.S, but more importantly it makes this value available to the build process, which will enable a future patch to export the necessary linear memory footprint into the bzImage header. [ Impact: cleanup, future patch enabling ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
61 lines
1.8 KiB
Makefile
61 lines
1.8 KiB
Makefile
#
|
|
# linux/arch/x86/boot/compressed/Makefile
|
|
#
|
|
# create a compressed vmlinux image from the original vmlinux
|
|
#
|
|
|
|
targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma head_$(BITS).o misc.o piggy.o
|
|
|
|
KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
|
|
KBUILD_CFLAGS += -fno-strict-aliasing -fPIC
|
|
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
|
|
cflags-$(CONFIG_X86_64) := -mcmodel=small
|
|
KBUILD_CFLAGS += $(cflags-y)
|
|
KBUILD_CFLAGS += $(call cc-option,-ffreestanding)
|
|
KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)
|
|
|
|
KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
|
|
|
|
LDFLAGS := -m elf_$(UTS_MACHINE)
|
|
LDFLAGS_vmlinux := -T
|
|
|
|
hostprogs-y := mkpiggy
|
|
|
|
$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/piggy.o FORCE
|
|
$(call if_changed,ld)
|
|
@:
|
|
|
|
OBJCOPYFLAGS_vmlinux.bin := -R .comment -S
|
|
$(obj)/vmlinux.bin: vmlinux FORCE
|
|
$(call if_changed,objcopy)
|
|
|
|
|
|
targets += vmlinux.bin.all vmlinux.relocs relocs
|
|
hostprogs-$(CONFIG_X86_NEED_RELOCS) += relocs
|
|
|
|
quiet_cmd_relocs = RELOCS $@
|
|
cmd_relocs = $(obj)/relocs $< > $@;$(obj)/relocs --abs-relocs $<
|
|
$(obj)/vmlinux.relocs: vmlinux $(obj)/relocs FORCE
|
|
$(call if_changed,relocs)
|
|
|
|
vmlinux.bin.all-y := $(obj)/vmlinux.bin
|
|
vmlinux.bin.all-$(CONFIG_X86_NEED_RELOCS) += $(obj)/vmlinux.relocs
|
|
|
|
$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE
|
|
$(call if_changed,gzip)
|
|
$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE
|
|
$(call if_changed,bzip2)
|
|
$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE
|
|
$(call if_changed,lzma)
|
|
|
|
suffix-$(CONFIG_KERNEL_GZIP) := gz
|
|
suffix-$(CONFIG_KERNEL_BZIP2) := bz2
|
|
suffix-$(CONFIG_KERNEL_LZMA) := lzma
|
|
|
|
quiet_cmd_mkpiggy = MKPIGGY $@
|
|
cmd_mkpiggy = $(obj)/mkpiggy $< > $@ || ( rm -f $@ ; false )
|
|
|
|
targets += piggy.S
|
|
$(obj)/piggy.S: $(obj)/vmlinux.bin.$(suffix-y) $(obj)/mkpiggy FORCE
|
|
$(call if_changed,mkpiggy)
|