1#
 2# linux/arch/x86/boot/compressed/Makefile
 3#
 4# create a compressed vmlinux image from the original vmlinux
 5#
 6
 7targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma vmlinux.bin.xz vmlinux.bin.lzo head_$(BITS).o misc.o string.o cmdline.o early_serial_console.o piggy.o
 8
 9KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
10KBUILD_CFLAGS += -fno-strict-aliasing -fPIC
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
11KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
12cflags-$(CONFIG_X86_32) := -march=i386
13cflags-$(CONFIG_X86_64) := -mcmodel=small
14KBUILD_CFLAGS += $(cflags-y)
15KBUILD_CFLAGS += $(call cc-option,-ffreestanding)
16KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
17
18KBUILD_AFLAGS  := $(KBUILD_CFLAGS) -D__ASSEMBLY__
19GCOV_PROFILE := n
 
20
21LDFLAGS := -m elf_$(UTS_MACHINE)
22LDFLAGS_vmlinux := -T
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
23
24hostprogs-y	:= mkpiggy
25
26$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/string.o $(obj)/cmdline.o $(obj)/early_serial_console.o $(obj)/piggy.o FORCE
27	$(call if_changed,ld)
28	@:
29
30OBJCOPYFLAGS_vmlinux.bin :=  -R .comment -S
31$(obj)/vmlinux.bin: vmlinux FORCE
32	$(call if_changed,objcopy)
33
 
34
35targets += vmlinux.bin.all vmlinux.relocs relocs
36hostprogs-$(CONFIG_X86_NEED_RELOCS) += relocs
37
38quiet_cmd_relocs = RELOCS  $@
39      cmd_relocs = $(obj)/relocs $< > $@;$(obj)/relocs --abs-relocs $<
40$(obj)/vmlinux.relocs: vmlinux $(obj)/relocs FORCE
41	$(call if_changed,relocs)
42
43vmlinux.bin.all-y := $(obj)/vmlinux.bin
44vmlinux.bin.all-$(CONFIG_X86_NEED_RELOCS) += $(obj)/vmlinux.relocs
45
46$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE
47	$(call if_changed,gzip)
48$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE
49	$(call if_changed,bzip2)
50$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE
51	$(call if_changed,lzma)
52$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE
53	$(call if_changed,xzkern)
54$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE
55	$(call if_changed,lzo)
 
 
 
 
56
57suffix-$(CONFIG_KERNEL_GZIP)	:= gz
58suffix-$(CONFIG_KERNEL_BZIP2)	:= bz2
59suffix-$(CONFIG_KERNEL_LZMA)	:= lzma
60suffix-$(CONFIG_KERNEL_XZ)	:= xz
61suffix-$(CONFIG_KERNEL_LZO) 	:= lzo
 
 
62
63quiet_cmd_mkpiggy = MKPIGGY $@
64      cmd_mkpiggy = $(obj)/mkpiggy $< > $@ || ( rm -f $@ ; false )
65
66targets += piggy.S
67$(obj)/piggy.S: $(obj)/vmlinux.bin.$(suffix-y) $(obj)/mkpiggy FORCE
68	$(call if_changed,mkpiggy)

  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
 23KMSAN_SANITIZE			:= n
 24OBJECT_FILES_NON_STANDARD	:= y
 25
 26# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
 27KCOV_INSTRUMENT		:= n
 28
 29targets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma \
 30	vmlinux.bin.xz vmlinux.bin.lzo vmlinux.bin.lz4 vmlinux.bin.zst
 31
 32# CLANG_FLAGS must come before any cc-disable-warning or cc-option calls in
 33# case of cross compiling, as it has the '--target=' flag, which is needed to
 34# avoid errors with '-march=i386', and future flags may depend on the target to
 35# be valid.
 36KBUILD_CFLAGS := -m$(BITS) -O2 $(CLANG_FLAGS)
 37KBUILD_CFLAGS += -fno-strict-aliasing -fPIE
 38KBUILD_CFLAGS += -Wundef
 39KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
 40cflags-$(CONFIG_X86_32) := -march=i386
 41cflags-$(CONFIG_X86_64) := -mcmodel=small -mno-red-zone
 42KBUILD_CFLAGS += $(cflags-y)
 43KBUILD_CFLAGS += -mno-mmx -mno-sse
 44KBUILD_CFLAGS += -ffreestanding -fshort-wchar
 45KBUILD_CFLAGS += -fno-stack-protector
 46KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
 47KBUILD_CFLAGS += $(call cc-disable-warning, gnu)
 48KBUILD_CFLAGS += -Wno-pointer-sign
 49KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
 50KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 51KBUILD_CFLAGS += -D__DISABLE_EXPORTS
 52# Disable relocation relaxation in case the link is not PIE.
 53KBUILD_CFLAGS += $(call cc-option,-Wa$(comma)-mrelax-relocations=no)
 54KBUILD_CFLAGS += -include $(srctree)/include/linux/hidden.h
 55
 56# sev.c indirectly includes inat-table.h which is generated during
 57# compilation and stored in $(objtree). Add the directory to the includes so
 58# that the compiler finds it even with out-of-tree builds (make O=/some/path).
 59CFLAGS_sev.o += -I$(objtree)/arch/x86/lib/
 60
 61KBUILD_AFLAGS  := $(KBUILD_CFLAGS) -D__ASSEMBLY__
 62GCOV_PROFILE := n
 63UBSAN_SANITIZE :=n
 64
 65KBUILD_LDFLAGS := -m elf_$(UTS_MACHINE)
 66KBUILD_LDFLAGS += $(call ld-option,--no-ld-generated-unwind-info)
 67# Compressed kernel should be built as PIE since it may be loaded at any
 68# address by the bootloader.
 69LDFLAGS_vmlinux := -pie $(call ld-option, --no-dynamic-linker)
 70ifdef CONFIG_LD_ORPHAN_WARN
 71LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)
 72endif
 73LDFLAGS_vmlinux += -z noexecstack
 74ifeq ($(CONFIG_LD_IS_BFD),y)
 75LDFLAGS_vmlinux += $(call ld-option,--no-warn-rwx-segments)
 76endif
 77ifeq ($(CONFIG_EFI_STUB),y)
 78# ensure that the static EFI stub library will be pulled in, even if it is
 79# never referenced explicitly from the startup code
 80LDFLAGS_vmlinux += -u efi_pe_entry
 81endif
 82LDFLAGS_vmlinux += -T
 83
 84hostprogs	:= mkpiggy
 85HOST_EXTRACFLAGS += -I$(srctree)/tools/include
 86
 87sed-voffset := -e 's/^\([0-9a-fA-F]*\) [ABCDGRSTVW] \(_text\|__start_rodata\|__bss_start\|_end\)$$/\#define VO_\2 _AC(0x\1,UL)/p'
 88
 89quiet_cmd_voffset = VOFFSET $@
 90      cmd_voffset = $(NM) $< | sed -n $(sed-voffset) > $@
 91
 92targets += ../voffset.h
 93
 94$(obj)/../voffset.h: vmlinux FORCE
 95	$(call if_changed,voffset)
 96
 97$(obj)/misc.o: $(obj)/../voffset.h
 98
 99vmlinux-objs-y := $(obj)/vmlinux.lds $(obj)/kernel_info.o $(obj)/head_$(BITS).o \
100	$(obj)/misc.o $(obj)/string.o $(obj)/cmdline.o $(obj)/error.o \
101	$(obj)/piggy.o $(obj)/cpuflags.o
102
103vmlinux-objs-$(CONFIG_EARLY_PRINTK) += $(obj)/early_serial_console.o
104vmlinux-objs-$(CONFIG_RANDOMIZE_BASE) += $(obj)/kaslr.o
105ifdef CONFIG_X86_64
106	vmlinux-objs-y += $(obj)/ident_map_64.o
107	vmlinux-objs-y += $(obj)/idt_64.o $(obj)/idt_handlers_64.o
108	vmlinux-objs-$(CONFIG_AMD_MEM_ENCRYPT) += $(obj)/mem_encrypt.o
109	vmlinux-objs-y += $(obj)/pgtable_64.o
110	vmlinux-objs-$(CONFIG_AMD_MEM_ENCRYPT) += $(obj)/sev.o
111endif
112
113vmlinux-objs-$(CONFIG_ACPI) += $(obj)/acpi.o
114vmlinux-objs-$(CONFIG_INTEL_TDX_GUEST) += $(obj)/tdx.o $(obj)/tdcall.o $(obj)/tdx-shared.o
115vmlinux-objs-$(CONFIG_UNACCEPTED_MEMORY) += $(obj)/mem.o
116
117vmlinux-objs-$(CONFIG_EFI) += $(obj)/efi.o
118vmlinux-objs-$(CONFIG_EFI_MIXED) += $(obj)/efi_mixed.o
119vmlinux-objs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
120
121$(obj)/vmlinux: $(vmlinux-objs-y) FORCE
 
 
122	$(call if_changed,ld)
 
123
124OBJCOPYFLAGS_vmlinux.bin :=  -R .comment -S
125$(obj)/vmlinux.bin: vmlinux FORCE
126	$(call if_changed,objcopy)
127
128targets += $(patsubst $(obj)/%,%,$(vmlinux-objs-y)) vmlinux.bin.all vmlinux.relocs
129
130# vmlinux.relocs is created by the vmlinux postlink step.
131$(obj)/vmlinux.relocs: vmlinux
132	@true
 
 
 
 
133
134vmlinux.bin.all-y := $(obj)/vmlinux.bin
135vmlinux.bin.all-$(CONFIG_X86_NEED_RELOCS) += $(obj)/vmlinux.relocs
136
137$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE
138	$(call if_changed,gzip)
139$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE
140	$(call if_changed,bzip2_with_size)
141$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE
142	$(call if_changed,lzma_with_size)
143$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE
144	$(call if_changed,xzkern_with_size)
145$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE
146	$(call if_changed,lzo_with_size)
147$(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y) FORCE
148	$(call if_changed,lz4_with_size)
149$(obj)/vmlinux.bin.zst: $(vmlinux.bin.all-y) FORCE
150	$(call if_changed,zstd22_with_size)
151
152suffix-$(CONFIG_KERNEL_GZIP)	:= gz
153suffix-$(CONFIG_KERNEL_BZIP2)	:= bz2
154suffix-$(CONFIG_KERNEL_LZMA)	:= lzma
155suffix-$(CONFIG_KERNEL_XZ)	:= xz
156suffix-$(CONFIG_KERNEL_LZO) 	:= lzo
157suffix-$(CONFIG_KERNEL_LZ4) 	:= lz4
158suffix-$(CONFIG_KERNEL_ZSTD)	:= zst
159
160quiet_cmd_mkpiggy = MKPIGGY $@
161      cmd_mkpiggy = $(obj)/mkpiggy $< > $@
162
163targets += piggy.S
164$(obj)/piggy.S: $(obj)/vmlinux.bin.$(suffix-y) $(obj)/mkpiggy FORCE
165	$(call if_changed,mkpiggy)