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_SA1100),y) 48OBJS += head-sa1100.o 49endif 50 51ifeq ($(CONFIG_CPU_XSCALE),y) 52OBJS += head-xscale.o 53endif 54 55ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y) 56OBJS += head-sharpsl.o 57endif 58 59ifeq ($(CONFIG_CPU_ENDIAN_BE32),y) 60ifeq ($(CONFIG_CPU_CP15),y) 61OBJS += big-endian.o 62else 63# The endian should be set by h/w design. 64endif 65endif 66 67ifeq ($(CONFIG_ARCH_SHMOBILE_LEGACY),y) 68OBJS += head-shmobile.o 69endif 70 71# 72# We now have a PIC decompressor implementation. Decompressors running 73# from RAM should not define ZTEXTADDR. Decompressors running directly 74# from ROM or Flash must define ZTEXTADDR (preferably via the config) 75# FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK 76ifeq ($(CONFIG_ZBOOT_ROM),y) 77ZTEXTADDR := $(CONFIG_ZBOOT_ROM_TEXT) 78ZBSSADDR := $(CONFIG_ZBOOT_ROM_BSS) 79else 80ZTEXTADDR := 0 81ZBSSADDR := ALIGN(8) 82endif 83 84CPPFLAGS_vmlinux.lds := -DTEXT_START="$(ZTEXTADDR)" -DBSS_START="$(ZBSSADDR)" 85 86suffix_$(CONFIG_KERNEL_GZIP) = gzip 87suffix_$(CONFIG_KERNEL_LZO) = lzo 88suffix_$(CONFIG_KERNEL_LZMA) = lzma 89suffix_$(CONFIG_KERNEL_XZ) = xzkern 90suffix_$(CONFIG_KERNEL_LZ4) = lz4 91 92# Borrowed libfdt files for the ATAG compatibility mode 93 94libfdt := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c 95libfdt_hdrs := fdt.h libfdt.h libfdt_internal.h 96 97libfdt_objs := $(addsuffix .o, $(basename $(libfdt))) 98 99$(addprefix $(obj)/,$(libfdt) $(libfdt_hdrs)): $(obj)/%: $(srctree)/scripts/dtc/libfdt/% 100 $(call cmd,shipped) 101 102$(addprefix $(obj)/,$(libfdt_objs) atags_to_fdt.o): \ 103 $(addprefix $(obj)/,$(libfdt_hdrs)) 104 105ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y) 106OBJS += $(libfdt_objs) atags_to_fdt.o 107endif 108 109targets := vmlinux vmlinux.lds \ 110 piggy.$(suffix_y) piggy.$(suffix_y).o \ 111 lib1funcs.o lib1funcs.S ashldi3.o ashldi3.S bswapsdi2.o \ 112 bswapsdi2.S font.o font.c head.o misc.o $(OBJS) 113 114# Make sure files are removed during clean 115extra-y += piggy.gzip piggy.lzo piggy.lzma piggy.xzkern piggy.lz4 \ 116 lib1funcs.S ashldi3.S bswapsdi2.S $(libfdt) $(libfdt_hdrs) \ 117 hyp-stub.S 118 119ifeq ($(CONFIG_FUNCTION_TRACER),y) 120ORIG_CFLAGS := $(KBUILD_CFLAGS) 121KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS)) 122endif 123 124ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj) 125asflags-y := -DZIMAGE 126 127# Supply kernel BSS size to the decompressor via a linker symbol. 128KBSS_SZ = $(shell $(CROSS_COMPILE)size $(obj)/../../../../vmlinux | \ 129 awk 'END{print $$3}') 130LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ) 131# Supply ZRELADDR to the decompressor via a linker symbol. 132ifneq ($(CONFIG_AUTO_ZRELADDR),y) 133LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR) 134endif 135ifeq ($(CONFIG_CPU_ENDIAN_BE8),y) 136LDFLAGS_vmlinux += --be8 137endif 138# ? 139LDFLAGS_vmlinux += -p 140# Report unresolved symbol references 141LDFLAGS_vmlinux += --no-undefined 142# Delete all temporary local symbols 143LDFLAGS_vmlinux += -X 144# Next argument is a linker script 145LDFLAGS_vmlinux += -T 146 147# For __aeabi_uidivmod 148lib1funcs = $(obj)/lib1funcs.o 149 150$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S 151 $(call cmd,shipped) 152 153# For __aeabi_llsl 154ashldi3 = $(obj)/ashldi3.o 155 156$(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S 157 $(call cmd,shipped) 158 159# For __bswapsi2, __bswapdi2 160bswapsdi2 = $(obj)/bswapsdi2.o 161 162$(obj)/bswapsdi2.S: $(srctree)/arch/$(SRCARCH)/lib/bswapsdi2.S 163 $(call cmd,shipped) 164 165# We need to prevent any GOTOFF relocs being used with references 166# to symbols in the .bss section since we cannot relocate them 167# independently from the rest at run time. This can be achieved by 168# ensuring that no private .bss symbols exist, as global symbols 169# always have a GOT entry which is what we need. 170# The .data section is already discarded by the linker script so no need 171# to bother about it here. 172check_for_bad_syms = \ 173bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \ 174[ -z "$$bad_syms" ] || \ 175 ( echo "following symbols must have non local/private scope:" >&2; \ 176 echo "$$bad_syms" >&2; rm -f $@; false ) 177 178check_for_multiple_zreladdr = \ 179if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \ 180 echo 'multiple zreladdrs: $(ZRELADDR)'; \ 181 echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \ 182 false; \ 183fi 184 185$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \ 186 $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) \ 187 $(bswapsdi2) FORCE 188 @$(check_for_multiple_zreladdr) 189 $(call if_changed,ld) 190 @$(check_for_bad_syms) 191 192$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE 193 $(call if_changed,$(suffix_y)) 194 195$(obj)/piggy.$(suffix_y).o: $(obj)/piggy.$(suffix_y) FORCE 196 197CFLAGS_font.o := -Dstatic= 198 199$(obj)/font.c: $(FONTC) 200 $(call cmd,shipped) 201 202$(obj)/hyp-stub.S: $(srctree)/arch/$(SRCARCH)/kernel/hyp-stub.S 203 $(call cmd,shipped) 204