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 16FONTC = $(srctree)/lib/fonts/font_acorn_8x8.c 17 18# string library code (-Os is enforced to keep it much smaller) 19OBJS += string.o 20CFLAGS_string.o := -Os 21 22ifeq ($(CONFIG_ARM_VIRT_EXT),y) 23OBJS += hyp-stub.o 24endif 25 26GCOV_PROFILE := n 27KASAN_SANITIZE := n 28 29# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in. 30KCOV_INSTRUMENT := 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-$(CONFIG_KERNEL_LZO) = lzo 81compress-$(CONFIG_KERNEL_LZMA) = lzma 82compress-$(CONFIG_KERNEL_XZ) = xzkern 83compress-$(CONFIG_KERNEL_LZ4) = lz4 84 85libfdt_objs := fdt_rw.o fdt_ro.o fdt_wip.o fdt.o 86 87ifeq ($(CONFIG_ARM_ATAG_DTB_COMPAT),y) 88OBJS += $(libfdt_objs) atags_to_fdt.o 89endif 90ifeq ($(CONFIG_USE_OF),y) 91OBJS += $(libfdt_objs) fdt_check_mem_start.o 92endif 93 94# -fstack-protector-strong triggers protection checks in this code, 95# but it is being used too early to link to meaningful stack_chk logic. 96$(foreach o, $(libfdt_objs) atags_to_fdt.o fdt_check_mem_start.o, \ 97 $(eval CFLAGS_$(o) := -I $(srctree)/scripts/dtc/libfdt -fno-stack-protector)) 98 99# These were previously generated C files. When you are building the kernel 100# with O=, make sure to remove the stale files in the output tree. Otherwise, 101# the build system wrongly compiles the stale ones. 102ifdef building_out_of_srctree 103$(shell rm -f $(addprefix $(obj)/, fdt_rw.c fdt_ro.c fdt_wip.c fdt.c)) 104endif 105 106targets := vmlinux vmlinux.lds piggy_data piggy.o \ 107 lib1funcs.o ashldi3.o bswapsdi2.o \ 108 head.o $(OBJS) 109 110clean-files += piggy_data lib1funcs.S ashldi3.S bswapsdi2.S hyp-stub.S 111 112KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING 113 114ccflags-y := -fpic $(call cc-option,-mno-single-pic-base,) -fno-builtin \ 115 -I$(obj) $(DISABLE_ARM_SSP_PER_TASK_PLUGIN) 116ccflags-remove-$(CONFIG_FUNCTION_TRACER) += -pg 117asflags-y := -DZIMAGE 118 119# Supply kernel BSS size to the decompressor via a linker symbol. 120KBSS_SZ = $(shell echo $$(($$($(NM) $(obj)/../../../../vmlinux | \ 121 sed -n -e 's/^\([^ ]*\) [ABD] __bss_start$$/-0x\1/p' \ 122 -e 's/^\([^ ]*\) [ABD] __bss_stop$$/+0x\1/p') )) ) 123LDFLAGS_vmlinux = --defsym _kernel_bss_size=$(KBSS_SZ) 124# Supply ZRELADDR to the decompressor via a linker symbol. 125ifneq ($(CONFIG_AUTO_ZRELADDR),y) 126LDFLAGS_vmlinux += --defsym zreladdr=$(ZRELADDR) 127endif 128ifeq ($(CONFIG_CPU_ENDIAN_BE8),y) 129LDFLAGS_vmlinux += --be8 130endif 131# Report unresolved symbol references 132LDFLAGS_vmlinux += --no-undefined 133# Delete all temporary local symbols 134LDFLAGS_vmlinux += -X 135# Report orphan sections 136ifdef CONFIG_LD_ORPHAN_WARN 137LDFLAGS_vmlinux += --orphan-handling=warn 138endif 139# Next argument is a linker script 140LDFLAGS_vmlinux += -T 141 142# For __aeabi_uidivmod 143lib1funcs = $(obj)/lib1funcs.o 144 145$(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S 146 $(call cmd,shipped) 147 148# For __aeabi_llsl 149ashldi3 = $(obj)/ashldi3.o 150 151$(obj)/ashldi3.S: $(srctree)/arch/$(SRCARCH)/lib/ashldi3.S 152 $(call cmd,shipped) 153 154# For __bswapsi2, __bswapdi2 155bswapsdi2 = $(obj)/bswapsdi2.o 156 157$(obj)/bswapsdi2.S: $(srctree)/arch/$(SRCARCH)/lib/bswapsdi2.S 158 $(call cmd,shipped) 159 160# We need to prevent any GOTOFF relocs being used with references 161# to symbols in the .bss section since we cannot relocate them 162# independently from the rest at run time. This can be achieved by 163# ensuring that no private .bss symbols exist, as global symbols 164# always have a GOT entry which is what we need. 165# The .data section is already discarded by the linker script so no need 166# to bother about it here. 167check_for_bad_syms = \ 168bad_syms=$$($(NM) $@ | sed -n 's/^.\{8\} [bc] \(.*\)/\1/p') && \ 169[ -z "$$bad_syms" ] || \ 170 ( echo "following symbols must have non local/private scope:" >&2; \ 171 echo "$$bad_syms" >&2; false ) 172 173check_for_multiple_zreladdr = \ 174if [ $(words $(ZRELADDR)) -gt 1 -a "$(CONFIG_AUTO_ZRELADDR)" = "" ]; then \ 175 echo 'multiple zreladdrs: $(ZRELADDR)'; \ 176 echo 'This needs CONFIG_AUTO_ZRELADDR to be set'; \ 177 false; \ 178fi 179 180efi-obj-$(CONFIG_EFI_STUB) := $(objtree)/drivers/firmware/efi/libstub/lib.a 181 182$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.o \ 183 $(addprefix $(obj)/, $(OBJS)) $(lib1funcs) $(ashldi3) \ 184 $(bswapsdi2) $(efi-obj-y) FORCE 185 @$(check_for_multiple_zreladdr) 186 $(call if_changed,ld) 187 @$(check_for_bad_syms) 188 189$(obj)/piggy_data: $(obj)/../Image FORCE 190 $(call if_changed,$(compress-y)) 191 192$(obj)/piggy.o: $(obj)/piggy_data 193 194CFLAGS_font.o := -Dstatic= 195 196$(obj)/font.c: $(FONTC) 197 $(call cmd,shipped) 198 199AFLAGS_hyp-stub.o := -Wa,-march=armv7-a 200 201$(obj)/hyp-stub.S: $(srctree)/arch/$(SRCARCH)/kernel/hyp-stub.S 202 $(call cmd,shipped) 203