1# SPDX-License-Identifier: GPL-2.0 2# 3# linux/arch/arm/boot/compressed/Makefile 4# 5# create a compressed vmlinuz image from the original vmlinux 6# 7 8OBJS = 9 10HEAD = head.o 11OBJS += misc.o decompress.o 12CFLAGS_decompress.o += $(DISABLE_STACKLEAK_PLUGIN) 13ifeq ($(CONFIG_DEBUG_UNCOMPRESS),y) 14OBJS += debug.o 15AFLAGS_head.o += -DDEBUG 16endif 17 18# string library code (-Os is enforced to keep it much smaller) 19OBJS += string.o 20CFLAGS_string.o := -Os 21 22ifeq ($(CONFIG_ARM_VIRT_EXT),y) 23OBJS += hyp-stub.o 24endif 25 26# 27# Architecture dependencies 28# 29ifeq ($(CONFIG_ARCH_ACORN),y) 30OBJS += ll_char_wr.o font.o 31endif 32 33ifeq ($(CONFIG_ARCH_SA1100),y) 34OBJS += head-sa1100.o 35endif 36 37ifeq ($(CONFIG_CPU_XSCALE),y) 38OBJS += head-xscale.o 39endif 40 41ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y) 42OBJS += head-sharpsl.o 43endif 44 45ifeq ($(CONFIG_CPU_ENDIAN_BE32),y) 46ifeq ($(CONFIG_CPU_CP15),y) 47OBJS += big-endian.o 48else 49# The endian should be set by h/w design. 50endif 51endif 52 53# 54# We now have a PIC decompressor implementation. Decompressors running 55# from RAM should not define ZTEXTADDR. Decompressors running directly 56# from ROM or Flash must define ZTEXTADDR (preferably via the config) 57# FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK 58ifeq ($(CONFIG_ZBOOT_ROM),y) 59ZTEXTADDR := $(CONFIG_ZBOOT_ROM_TEXT) 60ZBSSADDR := $(CONFIG_ZBOOT_ROM_BSS) 61else 62ZTEXTADDR := 0 63ZBSSADDR := ALIGN(8) 64endif 65 66MALLOC_SIZE := 65536 67 68AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET) -DMALLOC_SIZE=$(MALLOC_SIZE) 69CPPFLAGS_vmlinux.lds := -DTEXT_START="$(ZTEXTADDR)" -DBSS_START="$(ZBSSADDR)" 70CPPFLAGS_vmlinux.lds += -DTEXT_OFFSET="$(TEXT_OFFSET)" 71CPPFLAGS_vmlinux.lds += -DMALLOC_SIZE="$(MALLOC_SIZE)" 72 73compress-$(CONFIG_KERNEL_GZIP) = gzip 74compress-$(CONFIG_KERNEL_LZO) = lzo_with_size 75compress-$(CONFIG_KERNEL_LZMA) = lzma_with_size 76compress-$(CONFIG_KERNEL_XZ) = xzkern_with_size 77compress-$(CONFIG_KERNEL_LZ4) = lz4_with_size 78 79libfdt_objs := fdt_rw.o fdt_ro.o fdt_wip.o fdt.o 80 81ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y) 82CFLAGS_REMOVE_atags_to_fdt.o += -Wframe-larger-than=${CONFIG_FRAME_WARN} 83CFLAGS_atags_to_fdt.o += -Wframe-larger-than=1280 84OBJS += $(libfdt_objs) atags_to_fdt.o 85endif 86ifeq ($(CONFIG_USE_OF),y) 87OBJS += $(libfdt_objs) fdt_check_mem_start.o 88endif 89 90OBJS += lib1funcs.o ashldi3.o bswapsdi2.o 91 92targets := vmlinux vmlinux.lds piggy_data piggy.o \ 93 head.o $(OBJS) 94 95KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING 96 97ccflags-y := -fpic $(call cc-option,-mno-single-pic-base,) -fno-builtin \ 98 -I$(srctree)/scripts/dtc/libfdt -fno-stack-protector \ 99 -I$(obj) $(DISABLE_ARM_SSP_PER_TASK_PLUGIN) 100ccflags-remove-$(CONFIG_FUNCTION_TRACER) += -pg 101asflags-y := -DZIMAGE 102 103# Supply kernel BSS size to the decompressor via a linker symbol. 104KBSS_SZ = $(shell echo $$(($$($(NM) vmlinux | \ 105 sed -n -e 's/^\([^ ]*\) [ABD] __bss_start$$/-0x\1/p' \ 106 -e 's/^\([^ ]*\) [ABD] __bss_stop$$/+0x\1/p') )) ) 107LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ) 108# Supply ZRELADDR to the decompressor via a linker symbol. 109ifneq ($(CONFIG_AUTO_ZRELADDR),y) 110LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR) 111endif 112ifeq ($(CONFIG_CPU_ENDIAN_BE8),y) 113LDFLAGS_vmlinux += --be8 114endif 115# Report unresolved symbol references 116LDFLAGS_vmlinux += --no-undefined 117# Delete all temporary local symbols 118LDFLAGS_vmlinux += -X 119# Report orphan sections 120ifdef CONFIG_LD_ORPHAN_WARN 121LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL) 122endif 123# Next argument is a linker script 124LDFLAGS_vmlinux += -T 125 126# We need to prevent any GOTOFF relocs being used with references 127# to symbols in the .bss section since we cannot relocate them 128# independently from the rest at run time. This can be achieved by 129# ensuring that no private .bss symbols exist, as global symbols 130# always have a GOT entry which is what we need. 131# The .data section is already discarded by the linker script so no need 132# to bother about it here. 133check_for_bad_syms = \ 134bad_syms=$$($(NM) $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \ 135[ -z "$$bad_syms" ] || \ 136 ( echo "following symbols must have non local/private scope:" >&2; \ 137 echo "$$bad_syms" >&2; false ) 138 139check_for_multiple_zreladdr = \ 140if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \ 141 echo 'multiple zreladdrs: $(ZRELADDR)'; \ 142 echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \ 143 false; \ 144fi 145 146efi-obj-$(CONFIG_EFI_STUB) := $(objtree)/drivers/firmware/efi/libstub/lib.a 147 148$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \ 149 $(addprefix $(obj)/, $(OBJS)) \ 150 $(efi-obj-y) FORCE 151 @$(check_for_multiple_zreladdr) 152 $(call if_changed,ld) 153 @$(check_for_bad_syms) 154 155$(obj)/piggy_data: $(obj)/../Image FORCE 156 $(call if_changed,$(compress-y)) 157 158$(obj)/piggy.o: $(obj)/piggy_data 159 160CFLAGS_font.o := -Dstatic= 161