forked from Minki/linux
34cc1a8fe0
In commit d239b1dc09 the hardcoded 4x estimate for the decompressed
kernel size was replaced by the exact Image file size and passed to
the linker as a symbol value. Turns out that this is unneeded as the
size is already included at the end of the compressed piggy data.
For those compressed formats that don't include this data, the build
system already takes care of appending it using size_append in
scripts/Makefile.lib. So let's use that instead.
Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Tested-by: Tony Lindgren <tony@atomide.com>
140 lines
3.2 KiB
Makefile
140 lines
3.2 KiB
Makefile
#
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# linux/arch/arm/boot/compressed/Makefile
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#
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# create a compressed vmlinuz image from the original vmlinux
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#
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OBJS =
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# Ensure that mmcif loader code appears early in the image
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# to minimise that number of bocks that have to be read in
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# order to load it.
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ifeq ($(CONFIG_ZBOOT_ROM_MMCIF),y)
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ifeq ($(CONFIG_ARCH_SH7372),y)
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OBJS += mmcif-sh7372.o
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endif
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endif
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AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET)
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HEAD = head.o
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OBJS += misc.o decompress.o
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FONTC = $(srctree)/drivers/video/console/font_acorn_8x8.c
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#
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# Architecture dependencies
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#
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ifeq ($(CONFIG_ARCH_ACORN),y)
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OBJS += ll_char_wr.o font.o
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endif
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ifeq ($(CONFIG_ARCH_SHARK),y)
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OBJS += head-shark.o ofw-shark.o
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endif
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ifeq ($(CONFIG_ARCH_P720T),y)
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# Borrow this code from SA1100
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OBJS += head-sa1100.o
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endif
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ifeq ($(CONFIG_ARCH_SA1100),y)
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OBJS += head-sa1100.o
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endif
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ifeq ($(CONFIG_ARCH_VT8500),y)
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OBJS += head-vt8500.o
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endif
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ifeq ($(CONFIG_CPU_XSCALE),y)
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OBJS += head-xscale.o
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endif
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ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y)
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OBJS += head-sharpsl.o
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endif
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ifeq ($(CONFIG_CPU_ENDIAN_BE32),y)
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ifeq ($(CONFIG_CPU_CP15),y)
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OBJS += big-endian.o
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else
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# The endian should be set by h/w design.
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endif
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endif
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ifeq ($(CONFIG_ARCH_SHMOBILE),y)
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OBJS += head-shmobile.o
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endif
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#
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# We now have a PIC decompressor implementation. Decompressors running
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# from RAM should not define ZTEXTADDR. Decompressors running directly
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# from ROM or Flash must define ZTEXTADDR (preferably via the config)
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# FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK
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ifeq ($(CONFIG_ZBOOT_ROM),y)
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ZTEXTADDR := $(CONFIG_ZBOOT_ROM_TEXT)
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ZBSSADDR := $(CONFIG_ZBOOT_ROM_BSS)
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else
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ZTEXTADDR := 0
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ZBSSADDR := ALIGN(8)
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endif
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SEDFLAGS = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
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suffix_$(CONFIG_KERNEL_GZIP) = gzip
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suffix_$(CONFIG_KERNEL_LZO) = lzo
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suffix_$(CONFIG_KERNEL_LZMA) = lzma
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targets := vmlinux vmlinux.lds \
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piggy.$(suffix_y) piggy.$(suffix_y).o \
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font.o font.c head.o misc.o $(OBJS)
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# Make sure files are removed during clean
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extra-y += piggy.gzip piggy.lzo piggy.lzma lib1funcs.S
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ifeq ($(CONFIG_FUNCTION_TRACER),y)
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ORIG_CFLAGS := $(KBUILD_CFLAGS)
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KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
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endif
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ccflags-y := -fpic -fno-builtin
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asflags-y := -Wa,-march=all
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# Supply ZRELADDR to the decompressor via a linker symbol.
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ifneq ($(CONFIG_AUTO_ZRELADDR),y)
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LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR)
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endif
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ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
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LDFLAGS_vmlinux += --be8
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endif
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# ?
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LDFLAGS_vmlinux += -p
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# Report unresolved symbol references
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LDFLAGS_vmlinux += --no-undefined
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# Delete all temporary local symbols
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LDFLAGS_vmlinux += -X
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# Next argument is a linker script
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LDFLAGS_vmlinux += -T
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# For __aeabi_uidivmod
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lib1funcs = $(obj)/lib1funcs.o
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$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S FORCE
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$(call cmd,shipped)
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$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
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$(addprefix $(obj)/, $(OBJS)) $(lib1funcs) FORCE
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$(call if_changed,ld)
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@:
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$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE
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$(call if_changed,$(suffix_y))
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$(obj)/piggy.$(suffix_y).o: $(obj)/piggy.$(suffix_y) FORCE
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CFLAGS_font.o := -Dstatic=
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$(obj)/font.c: $(FONTC)
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$(call cmd,shipped)
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$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in arch/arm/boot/Makefile $(KCONFIG_CONFIG)
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@sed "$(SEDFLAGS)" < $< > $@
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