1# 2# linux/arch/arm/boot/compressed/Makefile 3# 4# create a compressed vmlinuz image from the original vmlinux 5# 6 7OBJS = 8 9AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET) 10HEAD = head.o 11OBJS += misc.o decompress.o 12ifeq ($(CONFIG_DEBUG_UNCOMPRESS),y) 13OBJS += debug.o 14endif 15FONTC = $(srctree)/lib/fonts/font_acorn_8x8.c 16 17# string library code (-Os is enforced to keep it much smaller) 18OBJS += string.o 19CFLAGS_string.o := -Os 20 21ifeq ($(CONFIG_ARM_VIRT_EXT),y) 22OBJS += hyp-stub.o 23endif 24 25GCOV_PROFILE := n 26 27# 28# Architecture dependencies 29# 30ifeq ($(CONFIG_ARCH_ACORN),y) 31OBJS += ll_char_wr.o font.o 32endif 33 34ifeq ($(CONFIG_ARCH_SA1100),y) 35OBJS += head-sa1100.o 36endif 37 38ifeq ($(CONFIG_CPU_XSCALE),y) 39OBJS += head-xscale.o 40endif 41 42ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y) 43OBJS += head-sharpsl.o 44endif 45 46ifeq ($(CONFIG_CPU_ENDIAN_BE32),y) 47ifeq ($(CONFIG_CPU_CP15),y) 48OBJS += big-endian.o 49else 50# The endian should be set by h/w design. 51endif 52endif 53 54# 55# We now have a PIC decompressor implementation. Decompressors running 56# from RAM should not define ZTEXTADDR. Decompressors running directly 57# from ROM or Flash must define ZTEXTADDR (preferably via the config) 58# FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK 59ifeq ($(CONFIG_ZBOOT_ROM),y) 60ZTEXTADDR := $(CONFIG_ZBOOT_ROM_TEXT) 61ZBSSADDR := $(CONFIG_ZBOOT_ROM_BSS) 62else 63ZTEXTADDR := 0 64ZBSSADDR := ALIGN(8) 65endif 66 67CPPFLAGS_vmlinux.lds := -DTEXT_START="$(ZTEXTADDR)" -DBSS_START="$(ZBSSADDR)" 68 69compress-$(CONFIG_KERNEL_GZIP) = gzip 70compress-$(CONFIG_KERNEL_LZO) = lzo 71compress-$(CONFIG_KERNEL_LZMA) = lzma 72compress-$(CONFIG_KERNEL_XZ) = xzkern 73compress-$(CONFIG_KERNEL_LZ4) = lz4 74 75# Borrowed libfdt files for the ATAG compatibility mode 76 77libfdt := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c 78libfdt_hdrs := fdt.h libfdt.h libfdt_internal.h 79 80libfdt_objs := $(addsuffix .o, $(basename $(libfdt))) 81 82$(addprefix $(obj)/,$(libfdt) $(libfdt_hdrs)): $(obj)/%: $(srctree)/scripts/dtc/libfdt/% 83 $(call cmd,shipped) 84 85$(addprefix $(obj)/,$(libfdt_objs) atags_to_fdt.o): \ 86 $(addprefix $(obj)/,$(libfdt_hdrs)) 87 88ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y) 89OBJS += $(libfdt_objs) atags_to_fdt.o 90endif 91 92targets := vmlinux vmlinux.lds piggy_data piggy.o \ 93 lib1funcs.o ashldi3.o bswapsdi2.o \ 94 head.o $(OBJS) 95 96clean-files += piggy_data lib1funcs.S ashldi3.S bswapsdi2.S \ 97 $(libfdt) $(libfdt_hdrs) hyp-stub.S 98 99KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING 100 101ifeq ($(CONFIG_FUNCTION_TRACER),y) 102ORIG_CFLAGS := $(KBUILD_CFLAGS) 103KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS)) 104endif 105 106# -fstack-protector-strong triggers protection checks in this code, 107# but it is being used too early to link to meaningful stack_chk logic. 108nossp_flags := $(call cc-option, -fno-stack-protector) 109CFLAGS_atags_to_fdt.o := $(nossp_flags) 110CFLAGS_fdt.o := $(nossp_flags) 111CFLAGS_fdt_ro.o := $(nossp_flags) 112CFLAGS_fdt_rw.o := $(nossp_flags) 113CFLAGS_fdt_wip.o := $(nossp_flags) 114 115ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj) 116asflags-y := -DZIMAGE 117 118# Supply kernel BSS size to the decompressor via a linker symbol. 119KBSS_SZ = $(shell $(CROSS_COMPILE)size $(obj)/../../../../vmlinux | \ 120 awk 'END{print $$3}') 121LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ) 122# Supply ZRELADDR to the decompressor via a linker symbol. 123ifneq ($(CONFIG_AUTO_ZRELADDR),y) 124LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR) 125endif 126ifeq ($(CONFIG_CPU_ENDIAN_BE8),y) 127LDFLAGS_vmlinux += --be8 128endif 129# ? 130LDFLAGS_vmlinux += -p 131# Report unresolved symbol references 132LDFLAGS_vmlinux += --no-undefined 133# Delete all temporary local symbols 134LDFLAGS_vmlinux += -X 135# Next argument is a linker script 136LDFLAGS_vmlinux += -T 137 138# For __aeabi_uidivmod 139lib1funcs = $(obj)/lib1funcs.o 140 141$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S 142 $(call cmd,shipped) 143 144# For __aeabi_llsl 145ashldi3 = $(obj)/ashldi3.o 146 147$(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S 148 $(call cmd,shipped) 149 150# For __bswapsi2, __bswapdi2 151bswapsdi2 = $(obj)/bswapsdi2.o 152 153$(obj)/bswapsdi2.S: $(srctree)/arch/$(SRCARCH)/lib/bswapsdi2.S 154 $(call cmd,shipped) 155 156# We need to prevent any GOTOFF relocs being used with references 157# to symbols in the .bss section since we cannot relocate them 158# independently from the rest at run time. This can be achieved by 159# ensuring that no private .bss symbols exist, as global symbols 160# always have a GOT entry which is what we need. 161# The .data section is already discarded by the linker script so no need 162# to bother about it here. 163check_for_bad_syms = \ 164bad_syms=$$($(CROSS_COMPILE)nm $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \ 165[ -z "$$bad_syms" ] || \ 166 ( echo "following symbols must have non local/private scope:" >&2; \ 167 echo "$$bad_syms" >&2; rm -f $@; false ) 168 169check_for_multiple_zreladdr = \ 170if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \ 171 echo 'multiple zreladdrs: $(ZRELADDR)'; \ 172 echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \ 173 false; \ 174fi 175 176efi-obj-$(CONFIG_EFI_STUB) := $(objtree)/drivers/firmware/efi/libstub/lib.a 177 178$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \ 179 $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) \ 180 $(bswapsdi2) $(efi-obj-y) FORCE 181 @$(check_for_multiple_zreladdr) 182 $(call if_changed,ld) 183 @$(check_for_bad_syms) 184 185$(obj)/piggy_data: $(obj)/../Image FORCE 186 $(call if_changed,$(compress-y)) 187 188$(obj)/piggy.o: $(obj)/piggy_data 189 190CFLAGS_font.o := -Dstatic= 191 192$(obj)/font.c: $(FONTC) 193 $(call cmd,shipped) 194 195AFLAGS_hyp-stub.o := -Wa,-march=armv7-a 196 197$(obj)/hyp-stub.S: $(srctree)/arch/$(SRCARCH)/kernel/hyp-stub.S 198 $(call cmd,shipped) 199