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 12ifeq ($(CONFIG_DEBUG_UNCOMPRESS),y) 13OBJS += debug.o 14AFLAGS_head.o += -DDEBUG 15endif 16 17# string library code (-Os is enforced to keep it much smaller) 18OBJS += string.o 19CFLAGS_string.o := -Os 20 21ifeq ($(CONFIG_ARM_VIRT_EXT),y) 22OBJS += hyp-stub.o 23endif 24 25GCOV_PROFILE := n 26KASAN_SANITIZE := n 27 28# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in. 29KCOV_INSTRUMENT := n 30UBSAN_SANITIZE := n 31 32# 33# Architecture dependencies 34# 35ifeq ($(CONFIG_ARCH_ACORN),y) 36OBJS += ll_char_wr.o font.o 37endif 38 39ifeq ($(CONFIG_ARCH_SA1100),y) 40OBJS += head-sa1100.o 41endif 42 43ifeq ($(CONFIG_CPU_XSCALE),y) 44OBJS += head-xscale.o 45endif 46 47ifeq ($(CONFIG_PXA_SHARPSL_DETECT_MACH_ID),y) 48OBJS += head-sharpsl.o 49endif 50 51ifeq ($(CONFIG_CPU_ENDIAN_BE32),y) 52ifeq ($(CONFIG_CPU_CP15),y) 53OBJS += big-endian.o 54else 55# The endian should be set by h/w design. 56endif 57endif 58 59# 60# We now have a PIC decompressor implementation. Decompressors running 61# from RAM should not define ZTEXTADDR. Decompressors running directly 62# from ROM or Flash must define ZTEXTADDR (preferably via the config) 63# FIXME: Previous assignment to ztextaddr-y is lost here. See SHARK 64ifeq ($(CONFIG_ZBOOT_ROM),y) 65ZTEXTADDR := $(CONFIG_ZBOOT_ROM_TEXT) 66ZBSSADDR := $(CONFIG_ZBOOT_ROM_BSS) 67else 68ZTEXTADDR := 0 69ZBSSADDR := ALIGN(8) 70endif 71 72MALLOC_SIZE := 65536 73 74AFLAGS_head.o += -DTEXT_OFFSET=$(TEXT_OFFSET) -DMALLOC_SIZE=$(MALLOC_SIZE) 75CPPFLAGS_vmlinux.lds := -DTEXT_START="$(ZTEXTADDR)" -DBSS_START="$(ZBSSADDR)" 76CPPFLAGS_vmlinux.lds += -DTEXT_OFFSET="$(TEXT_OFFSET)" 77CPPFLAGS_vmlinux.lds += -DMALLOC_SIZE="$(MALLOC_SIZE)" 78 79compress-$(CONFIG_KERNEL_GZIP) = gzip 80compress-$(CONFIG_KERNEL_LZO) = lzo_with_size 81compress-$(CONFIG_KERNEL_LZMA) = lzma_with_size 82compress-$(CONFIG_KERNEL_XZ) = xzkern_with_size 83compress-$(CONFIG_KERNEL_LZ4) = lz4_with_size 84 85libfdt_objs := fdt_rw.o fdt_ro.o fdt_wip.o fdt.o 86 87ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y) 88CFLAGS_REMOVE_atags_to_fdt.o += -Wframe-larger-than=${CONFIG_FRAME_WARN} 89CFLAGS_atags_to_fdt.o += -Wframe-larger-than=1280 90OBJS += $(libfdt_objs) atags_to_fdt.o 91endif 92ifeq ($(CONFIG_USE_OF),y) 93OBJS += $(libfdt_objs) fdt_check_mem_start.o 94endif 95 96OBJS += lib1funcs.o ashldi3.o bswapsdi2.o 97 98targets := vmlinux vmlinux.lds piggy_data piggy.o \ 99 head.o $(OBJS) 100 101KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING 102 103ccflags-y := -fpic $(call cc-option,-mno-single-pic-base,) -fno-builtin \ 104 -I$(srctree)/scripts/dtc/libfdt -fno-stack-protector \ 105 -I$(obj) $(DISABLE_ARM_SSP_PER_TASK_PLUGIN) 106ccflags-remove-$(CONFIG_FUNCTION_TRACER) += -pg 107asflags-y := -DZIMAGE 108 109# Supply kernel BSS size to the decompressor via a linker symbol. 110KBSS_SZ = $(shell echo $$(($$($(NM) $(obj)/../../../../vmlinux | \ 111 sed -n -e 's/^\([^ ]*\) [ABD] __bss_start$$/-0x\1/p' \ 112 -e 's/^\([^ ]*\) [ABD] __bss_stop$$/+0x\1/p') )) ) 113LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ) 114# Supply ZRELADDR to the decompressor via a linker symbol. 115ifneq ($(CONFIG_AUTO_ZRELADDR),y) 116LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR) 117endif 118ifeq ($(CONFIG_CPU_ENDIAN_BE8),y) 119LDFLAGS_vmlinux += --be8 120endif 121# Report unresolved symbol references 122LDFLAGS_vmlinux += --no-undefined 123# Delete all temporary local symbols 124LDFLAGS_vmlinux += -X 125# Report orphan sections 126ifdef CONFIG_LD_ORPHAN_WARN 127LDFLAGS_vmlinux += --orphan-handling=warn 128endif 129# Next argument is a linker script 130LDFLAGS_vmlinux += -T 131 132# We need to prevent any GOTOFF relocs being used with references 133# to symbols in the .bss section since we cannot relocate them 134# independently from the rest at run time. This can be achieved by 135# ensuring that no private .bss symbols exist, as global symbols 136# always have a GOT entry which is what we need. 137# The .data section is already discarded by the linker script so no need 138# to bother about it here. 139check_for_bad_syms = \ 140bad_syms=$$($(NM) $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \ 141[ -z "$$bad_syms" ] || \ 142 ( echo "following symbols must have non local/private scope:" >&2; \ 143 echo "$$bad_syms" >&2; false ) 144 145check_for_multiple_zreladdr = \ 146if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \ 147 echo 'multiple zreladdrs: $(ZRELADDR)'; \ 148 echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \ 149 false; \ 150fi 151 152efi-obj-$(CONFIG_EFI_STUB) := $(objtree)/drivers/firmware/efi/libstub/lib.a 153 154$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \ 155 $(addprefix $(obj)/, $(OBJS)) \ 156 $(efi-obj-y) FORCE 157 @$(check_for_multiple_zreladdr) 158 $(call if_changed,ld) 159 @$(check_for_bad_syms) 160 161$(obj)/piggy_data: $(obj)/../Image FORCE 162 $(call if_changed,$(compress-y)) 163 164$(obj)/piggy.o: $(obj)/piggy_data 165 166CFLAGS_font.o := -Dstatic= 167