| # SPDX-License-Identifier: GPL-2.0 |
| # |
| # linux/arch/x86/boot/compressed/Makefile |
| # |
| # create a compressed vmlinux image from the original vmlinux |
| # |
| # vmlinuz is: |
| # decompression code (*.o) |
| # asm globals (piggy.S), including: |
| # vmlinux.bin.(gz|bz2|lzma|...) |
| # |
| # vmlinux.bin is: |
| # vmlinux stripped of debugging and comments |
| # vmlinux.bin.all is: |
| # vmlinux.bin + vmlinux.relocs |
| # vmlinux.bin.(gz|bz2|lzma|...) is: |
| # (see scripts/Makefile.lib size_append) |
| # compressed vmlinux.bin.all + u32 size of vmlinux.bin.all |
| |
| # Sanitizer runtimes are unavailable and cannot be linked for early boot code. |
| KASAN_SANITIZE := n |
| KCSAN_SANITIZE := n |
| KMSAN_SANITIZE := n |
| OBJECT_FILES_NON_STANDARD := y |
| |
| # Prevents link failures: __sanitizer_cov_trace_pc() is not linked in. |
| KCOV_INSTRUMENT := n |
| |
| targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma \ |
| vmlinux.bin.xz vmlinux.bin.lzo vmlinux.bin.lz4 vmlinux.bin.zst |
| |
| # CLANG_FLAGS must come before any cc-disable-warning or cc-option calls in |
| # case of cross compiling, as it has the '--target=' flag, which is needed to |
| # avoid errors with '-march=i386', and future flags may depend on the target to |
| # be valid. |
| KBUILD_CFLAGS := -m$(BITS) -O2 $(CLANG_FLAGS) |
| KBUILD_CFLAGS += -fno-strict-aliasing -fPIE |
| KBUILD_CFLAGS += -Wundef |
| KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING |
| cflags-$(CONFIG_X86_32) := -march=i386 |
| cflags-$(CONFIG_X86_64) := -mcmodel=small -mno-red-zone |
| KBUILD_CFLAGS += $(cflags-y) |
| KBUILD_CFLAGS += -mno-mmx -mno-sse |
| KBUILD_CFLAGS += -ffreestanding -fshort-wchar |
| KBUILD_CFLAGS += -fno-stack-protector |
| KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) |
| KBUILD_CFLAGS += $(call cc-disable-warning, gnu) |
| KBUILD_CFLAGS += -Wno-pointer-sign |
| KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) |
| KBUILD_CFLAGS += -fno-asynchronous-unwind-tables |
| KBUILD_CFLAGS += -D__DISABLE_EXPORTS |
| # Disable relocation relaxation in case the link is not PIE. |
| KBUILD_CFLAGS += $(call as-option,-Wa$(comma)-mrelax-relocations=no) |
| KBUILD_CFLAGS += -include $(srctree)/include/linux/hidden.h |
| |
| # sev.c indirectly inludes inat-table.h which is generated during |
| # compilation and stored in $(objtree). Add the directory to the includes so |
| # that the compiler finds it even with out-of-tree builds (make O=/some/path). |
| CFLAGS_sev.o += -I$(objtree)/arch/x86/lib/ |
| |
| KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__ |
| GCOV_PROFILE := n |
| UBSAN_SANITIZE :=n |
| |
| KBUILD_LDFLAGS := -m elf_$(UTS_MACHINE) |
| KBUILD_LDFLAGS += $(call ld-option,--no-ld-generated-unwind-info) |
| # Compressed kernel should be built as PIE since it may be loaded at any |
| # address by the bootloader. |
| LDFLAGS_vmlinux := -pie $(call ld-option, --no-dynamic-linker) |
| ifdef CONFIG_LD_ORPHAN_WARN |
| LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL) |
| endif |
| LDFLAGS_vmlinux += -z noexecstack |
| ifeq ($(CONFIG_LD_IS_BFD),y) |
| LDFLAGS_vmlinux += $(call ld-option,--no-warn-rwx-segments) |
| endif |
| LDFLAGS_vmlinux += -T |
| |
| hostprogs := mkpiggy |
| HOST_EXTRACFLAGS += -I$(srctree)/tools/include |
| |
| sed-voffset := -e 's/^\([0-9a-fA-F]*\) [ABCDGRSTVW] \(_text\|__bss_start\|_end\)$$/\#define VO_\2 _AC(0x\1,UL)/p' |
| |
| quiet_cmd_voffset = VOFFSET $@ |
| cmd_voffset = $(NM) $< | sed -n $(sed-voffset) > $@ |
| |
| targets += ../voffset.h |
| |
| $(obj)/../voffset.h: vmlinux FORCE |
| $(call if_changed,voffset) |
| |
| $(obj)/misc.o: $(obj)/../voffset.h |
| |
| vmlinux-objs-y := $(obj)/vmlinux.lds $(obj)/kernel_info.o $(obj)/head_$(BITS).o \ |
| $(obj)/misc.o $(obj)/string.o $(obj)/cmdline.o $(obj)/error.o \ |
| $(obj)/piggy.o $(obj)/cpuflags.o |
| |
| vmlinux-objs-$(CONFIG_EARLY_PRINTK) += $(obj)/early_serial_console.o |
| vmlinux-objs-$(CONFIG_RANDOMIZE_BASE) += $(obj)/kaslr.o |
| ifdef CONFIG_X86_64 |
| vmlinux-objs-y += $(obj)/ident_map_64.o |
| vmlinux-objs-y += $(obj)/idt_64.o $(obj)/idt_handlers_64.o |
| vmlinux-objs-$(CONFIG_AMD_MEM_ENCRYPT) += $(obj)/mem_encrypt.o |
| vmlinux-objs-y += $(obj)/pgtable_64.o |
| vmlinux-objs-$(CONFIG_AMD_MEM_ENCRYPT) += $(obj)/sev.o |
| endif |
| |
| vmlinux-objs-$(CONFIG_ACPI) += $(obj)/acpi.o |
| vmlinux-objs-$(CONFIG_INTEL_TDX_GUEST) += $(obj)/tdx.o $(obj)/tdcall.o |
| |
| vmlinux-objs-$(CONFIG_EFI) += $(obj)/efi.o |
| vmlinux-objs-$(CONFIG_EFI_MIXED) += $(obj)/efi_mixed.o |
| vmlinux-objs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a |
| |
| $(obj)/vmlinux: $(vmlinux-objs-y) FORCE |
| $(call if_changed,ld) |
| |
| OBJCOPYFLAGS_vmlinux.bin := -R .comment -S |
| $(obj)/vmlinux.bin: vmlinux FORCE |
| $(call if_changed,objcopy) |
| |
| targets += $(patsubst $(obj)/%,%,$(vmlinux-objs-y)) vmlinux.bin.all vmlinux.relocs |
| |
| CMD_RELOCS = arch/x86/tools/relocs |
| quiet_cmd_relocs = RELOCS $@ |
| cmd_relocs = $(CMD_RELOCS) $< > $@;$(CMD_RELOCS) --abs-relocs $< |
| $(obj)/vmlinux.relocs: vmlinux FORCE |
| $(call if_changed,relocs) |
| |
| vmlinux.bin.all-y := $(obj)/vmlinux.bin |
| vmlinux.bin.all-$(CONFIG_X86_NEED_RELOCS) += $(obj)/vmlinux.relocs |
| |
| $(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE |
| $(call if_changed,gzip) |
| $(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE |
| $(call if_changed,bzip2_with_size) |
| $(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE |
| $(call if_changed,lzma_with_size) |
| $(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE |
| $(call if_changed,xzkern_with_size) |
| $(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE |
| $(call if_changed,lzo_with_size) |
| $(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y) FORCE |
| $(call if_changed,lz4_with_size) |
| $(obj)/vmlinux.bin.zst: $(vmlinux.bin.all-y) FORCE |
| $(call if_changed,zstd22_with_size) |
| |
| suffix-$(CONFIG_KERNEL_GZIP) := gz |
| suffix-$(CONFIG_KERNEL_BZIP2) := bz2 |
| suffix-$(CONFIG_KERNEL_LZMA) := lzma |
| suffix-$(CONFIG_KERNEL_XZ) := xz |
| suffix-$(CONFIG_KERNEL_LZO) := lzo |
| suffix-$(CONFIG_KERNEL_LZ4) := lz4 |
| suffix-$(CONFIG_KERNEL_ZSTD) := zst |
| |
| quiet_cmd_mkpiggy = MKPIGGY $@ |
| cmd_mkpiggy = $(obj)/mkpiggy $< > $@ |
| |
| targets += piggy.S |
| $(obj)/piggy.S: $(obj)/vmlinux.bin.$(suffix-y) $(obj)/mkpiggy FORCE |
| $(call if_changed,mkpiggy) |