1# SPDX-License-Identifier: GPL-2.0 2# 3# linux/arch/x86/boot/compressed/Makefile 4# 5# create a compressed vmlinux image from the original vmlinux 6# 7# vmlinuz is: 8# decompression code (*.o) 9# asm globals (piggy.S), including: 10# vmlinux.bin.(gz|bz2|lzma|...) 11# 12# vmlinux.bin is: 13# vmlinux stripped of debugging and comments 14# vmlinux.bin.all is: 15# vmlinux.bin + vmlinux.relocs 16# vmlinux.bin.(gz|bz2|lzma|...) is: 17# (see scripts/Makefile.lib size_append) 18# compressed vmlinux.bin.all + u32 size of vmlinux.bin.all 19 20# Sanitizer runtimes are unavailable and cannot be linked for early boot code. 21KASAN_SANITIZE := n 22KCSAN_SANITIZE := n 23OBJECT_FILES_NON_STANDARD := y 24 25# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in. 26KCOV_INSTRUMENT := n 27 28targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma \ 29 vmlinux.bin.xz vmlinux.bin.lzo vmlinux.bin.lz4 vmlinux.bin.zst 30 31KBUILD_CFLAGS := -m$(BITS) -O2 32KBUILD_CFLAGS += -fno-strict-aliasing -fPIE 33KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING 34cflags-$(CONFIG_X86_32) := -march=i386 35cflags-$(CONFIG_X86_64) := -mcmodel=small -mno-red-zone 36KBUILD_CFLAGS += $(cflags-y) 37KBUILD_CFLAGS += -mno-mmx -mno-sse 38KBUILD_CFLAGS += -ffreestanding -fshort-wchar 39KBUILD_CFLAGS += -fno-stack-protector 40KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) 41KBUILD_CFLAGS += $(call cc-disable-warning, gnu) 42KBUILD_CFLAGS += -Wno-pointer-sign 43KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) 44KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 45KBUILD_CFLAGS += -D__DISABLE_EXPORTS 46# Disable relocation relaxation in case the link is not PIE. 47KBUILD_CFLAGS += $(call as-option,-Wa$(comma)-mrelax-relocations=no) 48KBUILD_CFLAGS += -include $(srctree)/include/linux/hidden.h 49 50# sev-es.c indirectly inludes inat-table.h which is generated during 51# compilation and stored in $(objtree). Add the directory to the includes so 52# that the compiler finds it even with out-of-tree builds (make O=/some/path). 53CFLAGS_sev-es.o += -I$(objtree)/arch/x86/lib/ 54 55KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__ 56GCOV_PROFILE := n 57UBSAN_SANITIZE :=n 58 59KBUILD_LDFLAGS := -m elf_$(UTS_MACHINE) 60KBUILD_LDFLAGS += $(call ld-option,--no-ld-generated-unwind-info) 61# Compressed kernel should be built as PIE since it may be loaded at any 62# address by the bootloader. 63LDFLAGS_vmlinux := -pie $(call ld-option, --no-dynamic-linker) 64ifdef CONFIG_LD_ORPHAN_WARN 65LDFLAGS_vmlinux += --orphan-handling=warn 66endif 67LDFLAGS_vmlinux += -T 68 69hostprogs := mkpiggy 70HOST_EXTRACFLAGS += -I$(srctree)/tools/include 71 72sed-voffset := -e 's/^\([0-9a-fA-F]*\) [ABCDGRSTVW] \(_text\|__bss_start\|_end\)$$/\#define VO_\2 _AC(0x\1,UL)/p' 73 74quiet_cmd_voffset = VOFFSET $@ 75 cmd_voffset = $(NM) $< | sed -n $(sed-voffset) > $@ 76 77targets += ../voffset.h 78 79$(obj)/../voffset.h: vmlinux FORCE 80 $(call if_changed,voffset) 81 82$(obj)/misc.o: $(obj)/../voffset.h 83 84vmlinux-objs-y := $(obj)/vmlinux.lds $(obj)/kernel_info.o $(obj)/head_$(BITS).o \ 85 $(obj)/misc.o $(obj)/string.o $(obj)/cmdline.o $(obj)/error.o \ 86 $(obj)/piggy.o $(obj)/cpuflags.o 87 88vmlinux-objs-$(CONFIG_EARLY_PRINTK) += $(obj)/early_serial_console.o 89vmlinux-objs-$(CONFIG_RANDOMIZE_BASE) += $(obj)/kaslr.o 90ifdef CONFIG_X86_64 91 vmlinux-objs-y += $(obj)/ident_map_64.o 92 vmlinux-objs-y += $(obj)/idt_64.o $(obj)/idt_handlers_64.o 93 vmlinux-objs-y += $(obj)/mem_encrypt.o 94 vmlinux-objs-y += $(obj)/pgtable_64.o 95 vmlinux-objs-$(CONFIG_AMD_MEM_ENCRYPT) += $(obj)/sev-es.o 96endif 97 98vmlinux-objs-$(CONFIG_ACPI) += $(obj)/acpi.o 99 100vmlinux-objs-$(CONFIG_EFI_MIXED) += $(obj)/efi_thunk_$(BITS).o 101efi-obj-$(CONFIG_EFI_STUB) = $(objtree)/drivers/firmware/efi/libstub/lib.a 102 103$(obj)/vmlinux: $(vmlinux-objs-y) $(efi-obj-y) FORCE 104 $(call if_changed,ld) 105 106OBJCOPYFLAGS_vmlinux.bin := -R .comment -S 107$(obj)/vmlinux.bin: vmlinux FORCE 108 $(call if_changed,objcopy) 109 110targets += $(patsubst $(obj)/%,%,$(vmlinux-objs-y)) vmlinux.bin.all vmlinux.relocs 111 112CMD_RELOCS = arch/x86/tools/relocs 113quiet_cmd_relocs = RELOCS $@ 114 cmd_relocs = $(CMD_RELOCS) $< > $@;$(CMD_RELOCS) --abs-relocs $< 115$(obj)/vmlinux.relocs: vmlinux FORCE 116 $(call if_changed,relocs) 117 118vmlinux.bin.all-y := $(obj)/vmlinux.bin 119vmlinux.bin.all-$(CONFIG_X86_NEED_RELOCS) += $(obj)/vmlinux.relocs 120 121$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE 122 $(call if_changed,gzip) 123$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE 124 $(call if_changed,bzip2) 125$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE 126 $(call if_changed,lzma) 127$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE 128 $(call if_changed,xzkern) 129$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE 130 $(call if_changed,lzo) 131$(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y) FORCE 132 $(call if_changed,lz4) 133$(obj)/vmlinux.bin.zst: $(vmlinux.bin.all-y) FORCE 134 $(call if_changed,zstd22) 135 136suffix-$(CONFIG_KERNEL_GZIP) := gz 137suffix-$(CONFIG_KERNEL_BZIP2) := bz2 138suffix-$(CONFIG_KERNEL_LZMA) := lzma 139suffix-$(CONFIG_KERNEL_XZ) := xz 140suffix-$(CONFIG_KERNEL_LZO) := lzo 141suffix-$(CONFIG_KERNEL_LZ4) := lz4 142suffix-$(CONFIG_KERNEL_ZSTD) := zst 143 144quiet_cmd_mkpiggy = MKPIGGY $@ 145 cmd_mkpiggy = $(obj)/mkpiggy $< > $@ 146 147targets += piggy.S 148$(obj)/piggy.S: $(obj)/vmlinux.bin.$(suffix-y) $(obj)/mkpiggy FORCE 149 $(call if_changed,mkpiggy) 150