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150 lines
5.1 KiB
150 lines
5.1 KiB
# SPDX-License-Identifier: GPL-2.0 |
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# |
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# linux/arch/x86/boot/compressed/Makefile |
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# |
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# create a compressed vmlinux image from the original vmlinux |
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# |
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# vmlinuz is: |
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# decompression code (*.o) |
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# asm globals (piggy.S), including: |
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# vmlinux.bin.(gz|bz2|lzma|...) |
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# |
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# vmlinux.bin is: |
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# vmlinux stripped of debugging and comments |
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# vmlinux.bin.all is: |
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# vmlinux.bin + vmlinux.relocs |
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# vmlinux.bin.(gz|bz2|lzma|...) is: |
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# (see scripts/Makefile.lib size_append) |
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# compressed vmlinux.bin.all + u32 size of vmlinux.bin.all |
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# Sanitizer runtimes are unavailable and cannot be linked for early boot code. |
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KASAN_SANITIZE := n |
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KCSAN_SANITIZE := n |
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OBJECT_FILES_NON_STANDARD := y |
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# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in. |
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KCOV_INSTRUMENT := n |
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targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma \ |
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vmlinux.bin.xz vmlinux.bin.lzo vmlinux.bin.lz4 vmlinux.bin.zst |
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KBUILD_CFLAGS := -m$(BITS) -O2 |
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KBUILD_CFLAGS += -fno-strict-aliasing -fPIE |
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KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING |
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cflags-$(CONFIG_X86_32) := -march=i386 |
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cflags-$(CONFIG_X86_64) := -mcmodel=small -mno-red-zone |
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KBUILD_CFLAGS += $(cflags-y) |
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KBUILD_CFLAGS += -mno-mmx -mno-sse |
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KBUILD_CFLAGS += -ffreestanding -fshort-wchar |
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KBUILD_CFLAGS += -fno-stack-protector |
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KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) |
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KBUILD_CFLAGS += $(call cc-disable-warning, gnu) |
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KBUILD_CFLAGS += -Wno-pointer-sign |
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KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=) |
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KBUILD_CFLAGS += -fno-asynchronous-unwind-tables |
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KBUILD_CFLAGS += -D__DISABLE_EXPORTS |
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# Disable relocation relaxation in case the link is not PIE. |
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KBUILD_CFLAGS += $(call as-option,-Wa$(comma)-mrelax-relocations=no) |
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KBUILD_CFLAGS += -include $(srctree)/include/linux/hidden.h |
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KBUILD_CFLAGS += $(CLANG_FLAGS) |
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# sev-es.c indirectly inludes inat-table.h which is generated during |
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# compilation and stored in $(objtree). Add the directory to the includes so |
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# that the compiler finds it even with out-of-tree builds (make O=/some/path). |
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CFLAGS_sev-es.o += -I$(objtree)/arch/x86/lib/ |
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KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__ |
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GCOV_PROFILE := n |
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UBSAN_SANITIZE :=n |
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KBUILD_LDFLAGS := -m elf_$(UTS_MACHINE) |
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KBUILD_LDFLAGS += $(call ld-option,--no-ld-generated-unwind-info) |
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# Compressed kernel should be built as PIE since it may be loaded at any |
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# address by the bootloader. |
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LDFLAGS_vmlinux := -pie $(call ld-option, --no-dynamic-linker) |
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ifdef CONFIG_LD_ORPHAN_WARN |
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LDFLAGS_vmlinux += --orphan-handling=warn |
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endif |
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LDFLAGS_vmlinux += -T |
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hostprogs := mkpiggy |
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HOST_EXTRACFLAGS += -I$(srctree)/tools/include |
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sed-voffset := -e 's/^\([0-9a-fA-F]*\) [ABCDGRSTVW] \(_text\|__bss_start\|_end\)$$/\#define VO_\2 _AC(0x\1,UL)/p' |
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quiet_cmd_voffset = VOFFSET $@ |
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cmd_voffset = $(NM) $< | sed -n $(sed-voffset) > $@ |
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targets += ../voffset.h |
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$(obj)/../voffset.h: vmlinux FORCE |
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$(call if_changed,voffset) |
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$(obj)/misc.o: $(obj)/../voffset.h |
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vmlinux-objs-y := $(obj)/vmlinux.lds $(obj)/kernel_info.o $(obj)/head_$(BITS).o \ |
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$(obj)/misc.o $(obj)/string.o $(obj)/cmdline.o $(obj)/error.o \ |
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$(obj)/piggy.o $(obj)/cpuflags.o |
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vmlinux-objs-$(CONFIG_EARLY_PRINTK) += $(obj)/early_serial_console.o |
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vmlinux-objs-$(CONFIG_RANDOMIZE_BASE) += $(obj)/kaslr.o |
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ifdef CONFIG_X86_64 |
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vmlinux-objs-y += $(obj)/ident_map_64.o |
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vmlinux-objs-y += $(obj)/idt_64.o $(obj)/idt_handlers_64.o |
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vmlinux-objs-y += $(obj)/mem_encrypt.o |
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vmlinux-objs-y += $(obj)/pgtable_64.o |
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vmlinux-objs-$(CONFIG_AMD_MEM_ENCRYPT) += $(obj)/sev-es.o |
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endif |
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vmlinux-objs-$(CONFIG_ACPI) += $(obj)/acpi.o |
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vmlinux-objs-$(CONFIG_EFI_MIXED) += $(obj)/efi_thunk_$(BITS).o |
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efi-obj-$(CONFIG_EFI_STUB) = $(objtree)/drivers/firmware/efi/libstub/lib.a |
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$(obj)/vmlinux: $(vmlinux-objs-y) $(efi-obj-y) FORCE |
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$(call if_changed,ld) |
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OBJCOPYFLAGS_vmlinux.bin := -R .comment -S |
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$(obj)/vmlinux.bin: vmlinux FORCE |
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$(call if_changed,objcopy) |
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targets += $(patsubst $(obj)/%,%,$(vmlinux-objs-y)) vmlinux.bin.all vmlinux.relocs |
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CMD_RELOCS = arch/x86/tools/relocs |
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quiet_cmd_relocs = RELOCS $@ |
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cmd_relocs = $(CMD_RELOCS) $< > $@;$(CMD_RELOCS) --abs-relocs $< |
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$(obj)/vmlinux.relocs: vmlinux FORCE |
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$(call if_changed,relocs) |
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vmlinux.bin.all-y := $(obj)/vmlinux.bin |
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vmlinux.bin.all-$(CONFIG_X86_NEED_RELOCS) += $(obj)/vmlinux.relocs |
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$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE |
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$(call if_changed,gzip) |
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$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE |
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$(call if_changed,bzip2) |
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$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE |
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$(call if_changed,lzma) |
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$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE |
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$(call if_changed,xzkern) |
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$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE |
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$(call if_changed,lzo) |
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$(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y) FORCE |
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$(call if_changed,lz4) |
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$(obj)/vmlinux.bin.zst: $(vmlinux.bin.all-y) FORCE |
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$(call if_changed,zstd22) |
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suffix-$(CONFIG_KERNEL_GZIP) := gz |
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suffix-$(CONFIG_KERNEL_BZIP2) := bz2 |
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suffix-$(CONFIG_KERNEL_LZMA) := lzma |
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suffix-$(CONFIG_KERNEL_XZ) := xz |
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suffix-$(CONFIG_KERNEL_LZO) := lzo |
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suffix-$(CONFIG_KERNEL_LZ4) := lz4 |
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suffix-$(CONFIG_KERNEL_ZSTD) := zst |
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quiet_cmd_mkpiggy = MKPIGGY $@ |
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cmd_mkpiggy = $(obj)/mkpiggy $< > $@ |
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targets += piggy.S |
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$(obj)/piggy.S: $(obj)/vmlinux.bin.$(suffix-y) $(obj)/mkpiggy FORCE |
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$(call if_changed,mkpiggy)
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