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 40GCOV_PROFILE := n 41 42# 43# Architecture dependencies 44# 45ifeq ($(CONFIG_ARCH_ACORN),y) 46OBJS += ll_char_wr.o font.o 47endif 48 49ifeq ($(CONFIG_ARCH_SA1100),y) 50OBJS += head-sa1100.o 51endif 52 53ifeq ($(CONFIG_CPU_XSCALE),y) 54OBJS += head-xscale.o 55endif 56 57ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y) 58OBJS += head-sharpsl.o 59endif 60 61ifeq ($(CONFIG_CPU_ENDIAN_BE32),y) 62ifeq ($(CONFIG_CPU_CP15),y) 63OBJS += big-endian.o 64else 65# The endian should be set by h/w design. 66endif 67endif 68 69ifeq ($(CONFIG_ARCH_SHMOBILE_LEGACY),y) 70OBJS += head-shmobile.o 71endif 72 73# 74# We now have a PIC decompressor implementation. Decompressors running 75# from RAM should not define ZTEXTADDR. Decompressors running directly 76# from ROM or Flash must define ZTEXTADDR (preferably via the config) 77# FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK 78ifeq ($(CONFIG_ZBOOT_ROM),y) 79ZTEXTADDR := $(CONFIG_ZBOOT_ROM_TEXT) 80ZBSSADDR := $(CONFIG_ZBOOT_ROM_BSS) 81else 82ZTEXTADDR := 0 83ZBSSADDR := ALIGN(8) 84endif 85 86CPPFLAGS_vmlinux.lds := -DTEXT_START="$(ZTEXTADDR)" -DBSS_START="$(ZBSSADDR)" 87 88suffix_$(CONFIG_KERNEL_GZIP) = gzip 89suffix_$(CONFIG_KERNEL_LZO) = lzo 90suffix_$(CONFIG_KERNEL_LZMA) = lzma 91suffix_$(CONFIG_KERNEL_XZ) = xzkern 92suffix_$(CONFIG_KERNEL_LZ4) = lz4 93 94# Borrowed libfdt files for the ATAG compatibility mode 95 96libfdt := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c 97libfdt_hdrs := fdt.h libfdt.h libfdt_internal.h 98 99libfdt_objs := $(addsuffix .o, $(basename $(libfdt))) 100 101$(addprefix $(obj)/,$(libfdt) $(libfdt_hdrs)): $(obj)/%: $(srctree)/scripts/dtc/libfdt/% 102 $(call cmd,shipped) 103 104$(addprefix $(obj)/,$(libfdt_objs) atags_to_fdt.o): \ 105 $(addprefix $(obj)/,$(libfdt_hdrs)) 106 107ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y) 108OBJS += $(libfdt_objs) atags_to_fdt.o 109endif 110 111targets := vmlinux vmlinux.lds \ 112 piggy.$(suffix_y) piggy.$(suffix_y).o \ 113 lib1funcs.o lib1funcs.S ashldi3.o ashldi3.S bswapsdi2.o \ 114 bswapsdi2.S font.o font.c head.o misc.o $(OBJS) 115 116# Make sure files are removed during clean 117extra-y += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern piggy.lz4 \ 118 lib1funcs.S ashldi3.S bswapsdi2.S $(libfdt) $(libfdt_hdrs) \ 119 hyp-stub.S 120 121ifeq ($(CONFIG_FUNCTION_TRACER),y) 122ORIG_CFLAGS := $(KBUILD_CFLAGS) 123KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS)) 124endif 125 126ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj) 127asflags-y := -DZIMAGE 128 129# Supply kernel BSS size to the decompressor via a linker symbol. 130KBSS_SZ = $(shell $(CROSS_COMPILE)size $(obj)/../../../../vmlinux | \ 131 awk 'END{print $$3}') 132LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ) 133# Supply ZRELADDR to the decompressor via a linker symbol. 134ifneq ($(CONFIG_AUTO_ZRELADDR),y) 135LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR) 136endif 137ifeq ($(CONFIG_CPU_ENDIAN_BE8),y) 138LDFLAGS_vmlinux += --be8 139endif 140# ? 141LDFLAGS_vmlinux += -p 142# Report unresolved symbol references 143LDFLAGS_vmlinux += --no-undefined 144# Delete all temporary local symbols 145LDFLAGS_vmlinux += -X 146# Next argument is a linker script 147LDFLAGS_vmlinux += -T 148 149# For __aeabi_uidivmod 150lib1funcs = $(obj)/lib1funcs.o 151 152$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S 153 $(call cmd,shipped) 154 155# For __aeabi_llsl 156ashldi3 = $(obj)/ashldi3.o 157 158$(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S 159 $(call cmd,shipped) 160 161# For __bswapsi2, __bswapdi2 162bswapsdi2 = $(obj)/bswapsdi2.o 163 164$(obj)/bswapsdi2.S: $(srctree)/arch/$(SRCARCH)/lib/bswapsdi2.S 165 $(call cmd,shipped) 166 167# We need to prevent any GOTOFF relocs being used with references 168# to symbols in the .bss section since we cannot relocate them 169# independently from the rest at run time. This can be achieved by 170# ensuring that no private .bss symbols exist, as global symbols 171# always have a GOT entry which is what we need. 172# The .data section is already discarded by the linker script so no need 173# to bother about it here. 174check_for_bad_syms = \ 175bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \ 176[ -z "$$bad_syms" ] || \ 177 ( echo "following symbols must have non local/private scope:" >&2; \ 178 echo "$$bad_syms" >&2; rm -f $@; false ) 179 180check_for_multiple_zreladdr = \ 181if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \ 182 echo 'multiple zreladdrs: $(ZRELADDR)'; \ 183 echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \ 184 false; \ 185fi 186 187$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \ 188 $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) \ 189 $(bswapsdi2) FORCE 190 @$(check_for_multiple_zreladdr) 191 $(call if_changed,ld) 192 @$(check_for_bad_syms) 193 194$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE 195 $(call if_changed,$(suffix_y)) 196 197$(obj)/piggy.$(suffix_y).o: $(obj)/piggy.$(suffix_y) FORCE 198 199CFLAGS_font.o := -Dstatic= 200 201$(obj)/font.c: $(FONTC) 202 $(call cmd,shipped) 203 204$(obj)/hyp-stub.S: $(srctree)/arch/$(SRCARCH)/kernel/hyp-stub.S 205 $(call cmd,shipped) 206