1# 2# linux/arch/arm/boot/compressed/Makefile 3# 4# create a compressed vmlinuz image from the original vmlinux 5# 6 7OBJS = 8 9# Ensure that MMCIF loader code appears early in the image 10# to minimise that number of bocks that have to be read in 11# order to load it. 12ifeq ($(CONFIG_ZBOOT_ROM_MMCIF),y) 13OBJS += mmcif-sh7372.o 14endif 15 16# Ensure that SDHI loader code appears early in the image 17# to minimise that number of bocks that have to be read in 18# order to load it. 19ifeq ($(CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI),y) 20OBJS += sdhi-shmobile.o 21OBJS += sdhi-sh7372.o 22endif 23 24AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET) 25HEAD = head.o 26OBJS += misc.o decompress.o 27ifeq ($(CONFIG_DEBUG_UNCOMPRESS),y) 28OBJS += debug.o 29endif 30FONTC = $(srctree)/lib/fonts/font_acorn_8x8.c 31 32# string library code (-Os is enforced to keep it much smaller) 33OBJS += string.o 34CFLAGS_string.o := -Os 35 36ifeq ($(CONFIG_ARM_VIRT_EXT),y) 37OBJS += hyp-stub.o 38endif 39 40# 41# Architecture dependencies 42# 43ifeq ($(CONFIG_ARCH_ACORN),y) 44OBJS += ll_char_wr.o font.o 45endif 46 47ifeq ($(CONFIG_ARCH_SHARK),y) 48OBJS += head-shark.o ofw-shark.o 49endif 50 51ifeq ($(CONFIG_ARCH_SA1100),y) 52OBJS += head-sa1100.o 53endif 54 55ifeq ($(CONFIG_CPU_XSCALE),y) 56OBJS += head-xscale.o 57endif 58 59ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y) 60OBJS += head-sharpsl.o 61endif 62 63ifeq ($(CONFIG_CPU_ENDIAN_BE32),y) 64ifeq ($(CONFIG_CPU_CP15),y) 65OBJS += big-endian.o 66else 67# The endian should be set by h/w design. 68endif 69endif 70 71ifeq ($(CONFIG_ARCH_SHMOBILE),y) 72OBJS += head-shmobile.o 73endif 74 75# 76# We now have a PIC decompressor implementation. Decompressors running 77# from RAM should not define ZTEXTADDR. Decompressors running directly 78# from ROM or Flash must define ZTEXTADDR (preferably via the config) 79# FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK 80ifeq ($(CONFIG_ZBOOT_ROM),y) 81ZTEXTADDR := $(CONFIG_ZBOOT_ROM_TEXT) 82ZBSSADDR := $(CONFIG_ZBOOT_ROM_BSS) 83else 84ZTEXTADDR := 0 85ZBSSADDR := ALIGN(8) 86endif 87 88SEDFLAGS = s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/ 89 90suffix_$(CONFIG_KERNEL_GZIP) = gzip 91suffix_$(CONFIG_KERNEL_LZO) = lzo 92suffix_$(CONFIG_KERNEL_LZMA) = lzma 93suffix_$(CONFIG_KERNEL_XZ) = xzkern 94suffix_$(CONFIG_KERNEL_LZ4) = lz4 95 96# Borrowed libfdt files for the ATAG compatibility mode 97 98libfdt := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c 99libfdt_hdrs := fdt.h libfdt.h libfdt_internal.h 100 101libfdt_objs := $(addsuffix .o, $(basename $(libfdt))) 102 103$(addprefix $(obj)/,$(libfdt) $(libfdt_hdrs)): $(obj)/%: $(srctree)/scripts/dtc/libfdt/% 104 $(call cmd,shipped) 105 106$(addprefix $(obj)/,$(libfdt_objs) atags_to_fdt.o): \ 107 $(addprefix $(obj)/,$(libfdt_hdrs)) 108 109ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y) 110OBJS += $(libfdt_objs) atags_to_fdt.o 111endif 112 113targets := vmlinux vmlinux.lds \ 114 piggy.$(suffix_y) piggy.$(suffix_y).o \ 115 lib1funcs.o lib1funcs.S ashldi3.o ashldi3.S \ 116 font.o font.c head.o misc.o $(OBJS) 117 118# Make sure files are removed during clean 119extra-y += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern piggy.lz4 \ 120 lib1funcs.S ashldi3.S $(libfdt) $(libfdt_hdrs) \ 121 hyp-stub.S 122 123ifeq ($(CONFIG_FUNCTION_TRACER),y) 124ORIG_CFLAGS := $(KBUILD_CFLAGS) 125KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS)) 126endif 127 128ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj) 129asflags-y := -DZIMAGE 130 131# Supply kernel BSS size to the decompressor via a linker symbol. 132KBSS_SZ = $(shell $(CROSS_COMPILE)size $(obj)/../../../../vmlinux | \ 133 awk 'END{print $$3}') 134LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ) 135# Supply ZRELADDR to the decompressor via a linker symbol. 136ifneq ($(CONFIG_AUTO_ZRELADDR),y) 137LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR) 138endif 139ifeq ($(CONFIG_CPU_ENDIAN_BE8),y) 140LDFLAGS_vmlinux += --be8 141endif 142# ? 143LDFLAGS_vmlinux += -p 144# Report unresolved symbol references 145LDFLAGS_vmlinux += --no-undefined 146# Delete all temporary local symbols 147LDFLAGS_vmlinux += -X 148# Next argument is a linker script 149LDFLAGS_vmlinux += -T 150 151# For __aeabi_uidivmod 152lib1funcs = $(obj)/lib1funcs.o 153 154$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S 155 $(call cmd,shipped) 156 157# For __aeabi_llsl 158ashldi3 = $(obj)/ashldi3.o 159 160$(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S 161 $(call cmd,shipped) 162 163# We need to prevent any GOTOFF relocs being used with references 164# to symbols in the .bss section since we cannot relocate them 165# independently from the rest at run time. This can be achieved by 166# ensuring that no private .bss symbols exist, as global symbols 167# always have a GOT entry which is what we need. 168# The .data section is already discarded by the linker script so no need 169# to bother about it here. 170check_for_bad_syms = \ 171bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \ 172[ -z "$$bad_syms" ] || \ 173 ( echo "following symbols must have non local/private scope:" >&2; \ 174 echo "$$bad_syms" >&2; rm -f $@; false ) 175 176check_for_multiple_zreladdr = \ 177if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \ 178 echo 'multiple zreladdrs: $(ZRELADDR)'; \ 179 echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \ 180 false; \ 181fi 182 183$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \ 184 $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) FORCE 185 @$(check_for_multiple_zreladdr) 186 $(call if_changed,ld) 187 @$(check_for_bad_syms) 188 189$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE 190 $(call if_changed,$(suffix_y)) 191 192$(obj)/piggy.$(suffix_y).o: $(obj)/piggy.$(suffix_y) FORCE 193 194CFLAGS_font.o := -Dstatic= 195 196$(obj)/font.c: $(FONTC) 197 $(call cmd,shipped) 198 199$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in arch/arm/boot/Makefile $(KCONFIG_CONFIG) 200 @sed "$(SEDFLAGS)" < $< > $@ 201 202$(obj)/hyp-stub.S: $(srctree)/arch/$(SRCARCH)/kernel/hyp-stub.S 203 $(call cmd,shipped) 204