xref: /linux/arch/x86/boot/compressed/Makefile (revision 56d5e32929ee8e772922242f37cc234c437c89c0)
1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
2db569afaSSam Ravnborg#
3db569afaSSam Ravnborg# linux/arch/x86/boot/compressed/Makefile
4db569afaSSam Ravnborg#
5db569afaSSam Ravnborg# create a compressed vmlinux image from the original vmlinux
6db569afaSSam Ravnborg#
7fb7183efSKees Cook# vmlinuz is:
8fb7183efSKees Cook#	decompression code (*.o)
9fb7183efSKees Cook#	asm globals (piggy.S), including:
10fb7183efSKees Cook#		vmlinux.bin.(gz|bz2|lzma|...)
11fb7183efSKees Cook#
12fb7183efSKees Cook# vmlinux.bin is:
13fb7183efSKees Cook#	vmlinux stripped of debugging and comments
14fb7183efSKees Cook# vmlinux.bin.all is:
15fb7183efSKees Cook#	vmlinux.bin + vmlinux.relocs
16fb7183efSKees Cook# vmlinux.bin.(gz|bz2|lzma|...) is:
17fb7183efSKees Cook#	(see scripts/Makefile.lib size_append)
18fb7183efSKees Cook#	compressed vmlinux.bin.all + u32 size of vmlinux.bin.all
19db569afaSSam Ravnborg
20f9b493acSKyungsik Leetargets := vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 vmlinux.bin.lzma \
21fb46d057SNick Terrell	vmlinux.bin.xz vmlinux.bin.lzo vmlinux.bin.lz4 vmlinux.bin.zst
22db569afaSSam Ravnborg
235fe392ffSNathan Chancellor# CLANG_FLAGS must come before any cc-disable-warning or cc-option calls in
245fe392ffSNathan Chancellor# case of cross compiling, as it has the '--target=' flag, which is needed to
255fe392ffSNathan Chancellor# avoid errors with '-march=i386', and future flags may depend on the target to
265fe392ffSNathan Chancellor# be valid.
275fe392ffSNathan ChancellorKBUILD_CFLAGS := -m$(BITS) -O2 $(CLANG_FLAGS)
28ee2ab467SNathan ChancellorKBUILD_CFLAGS += -std=gnu11
29527afc21SArvind SankarKBUILD_CFLAGS += -fno-strict-aliasing -fPIE
30a554e740SNick DesaulniersKBUILD_CFLAGS += -Wundef
3195a38f34SH. Peter AnvinKBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
3217a2a9b5SH. Peter Anvincflags-$(CONFIG_X86_32) := -march=i386
336ba0efa4SJoerg Roedelcflags-$(CONFIG_X86_64) := -mcmodel=small -mno-red-zone
34db569afaSSam RavnborgKBUILD_CFLAGS += $(cflags-y)
358b3b005dSH. Peter AnvinKBUILD_CFLAGS += -mno-mmx -mno-sse
36e1ac4b24SChester LinKBUILD_CFLAGS += -ffreestanding -fshort-wchar
37893ab004SMasahiro YamadaKBUILD_CFLAGS += -fno-stack-protector
3820c6c189SMatthias KaehlckeKBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member)
396c3b56b1SMatthias KaehlckeKBUILD_CFLAGS += $(call cc-disable-warning, gnu)
40dca5203eSNathan ChancellorKBUILD_CFLAGS += -Wno-pointer-sign
41003602adSArvind SankarKBUILD_CFLAGS += -fno-asynchronous-unwind-tables
42fb46d057SNick TerrellKBUILD_CFLAGS += -D__DISABLE_EXPORTS
4309e43968SArvind Sankar# Disable relocation relaxation in case the link is not PIE.
44994f5f78SNick DesaulniersKBUILD_CFLAGS += $(call cc-option,-Wa$(comma)-mrelax-relocations=no)
45e544ea57SArd BiesheuvelKBUILD_CFLAGS += -include $(srctree)/include/linux/hidden.h
46db569afaSSam Ravnborg
47ae862964SArd Biesheuvel# sev-decode-insn.c indirectly includes inat-table.c which is generated during
48597cfe48SJoerg Roedel# compilation and stored in $(objtree). Add the directory to the includes so
49597cfe48SJoerg Roedel# that the compiler finds it even with out-of-tree builds (make O=/some/path).
50ae862964SArd BiesheuvelCFLAGS_sev-handle-vc.o += -I$(objtree)/arch/x86/lib/
51597cfe48SJoerg Roedel
52db569afaSSam RavnborgKBUILD_AFLAGS  := $(KBUILD_CFLAGS) -D__ASSEMBLY__
53db569afaSSam Ravnborg
54d503ac53SMasahiro YamadaKBUILD_LDFLAGS := -m elf_$(UTS_MACHINE)
55d1c0272bSKees CookKBUILD_LDFLAGS += $(call ld-option,--no-ld-generated-unwind-info)
56a980ce35SH.J. Lu# Compressed kernel should be built as PIE since it may be loaded at any
57a980ce35SH.J. Lu# address by the bootloader.
58527afc21SArvind SankarLDFLAGS_vmlinux := -pie $(call ld-option, --no-dynamic-linker)
5959612b24SNathan Chancellorifdef CONFIG_LD_ORPHAN_WARN
60e1789d7cSXin LiLDFLAGS_vmlinux += --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)
6159612b24SNathan Chancellorendif
62ffcf9c57SNick DesaulniersLDFLAGS_vmlinux += -z noexecstack
63ffcf9c57SNick Desaulniersifeq ($(CONFIG_LD_IS_BFD),y)
64ffcf9c57SNick DesaulniersLDFLAGS_vmlinux += $(call ld-option,--no-warn-rwx-segments)
65ffcf9c57SNick Desaulniersendif
66a1b87d54SArd Biesheuvelifeq ($(CONFIG_EFI_STUB),y)
67a1b87d54SArd Biesheuvel# ensure that the static EFI stub library will be pulled in, even if it is
68a1b87d54SArd Biesheuvel# never referenced explicitly from the startup code
69a1b87d54SArd BiesheuvelLDFLAGS_vmlinux += -u efi_pe_entry
70a1b87d54SArd Biesheuvelendif
713f086189SArvind SankarLDFLAGS_vmlinux += -T
72db569afaSSam Ravnborg
735f2fb52fSMasahiro Yamadahostprogs	:= mkpiggy
7412871c56SMatt FlemingHOST_EXTRACFLAGS += -I$(srctree)/tools/include
7502a884c0SH. Peter Anvin
764cecebf2SArd Biesheuvelsed-voffset := -e 's/^\([0-9a-fA-F]*\) [ABbCDGRSTtVW] \(_text\|__start_rodata\|__bss_start\|_end\)$$/\#define VO_\2 _AC(0x\1,UL)/p'
7767b66625SYinghai Lu
7867b66625SYinghai Luquiet_cmd_voffset = VOFFSET $@
7967b66625SYinghai Lu      cmd_voffset = $(NM) $< | sed -n $(sed-voffset) > $@
8067b66625SYinghai Lu
8167b66625SYinghai Lutargets += ../voffset.h
8267b66625SYinghai Lu
8367b66625SYinghai Lu$(obj)/../voffset.h: vmlinux FORCE
8467b66625SYinghai Lu	$(call if_changed,voffset)
8567b66625SYinghai Lu
8667b66625SYinghai Lu$(obj)/misc.o: $(obj)/../voffset.h
8767b66625SYinghai Lu
882c33c27fSDaniel Kipervmlinux-objs-y := $(obj)/vmlinux.lds $(obj)/kernel_info.o $(obj)/head_$(BITS).o \
892c33c27fSDaniel Kiper	$(obj)/misc.o $(obj)/string.o $(obj)/cmdline.o $(obj)/error.o \
909e6abd2aSJosh Triplett	$(obj)/piggy.o $(obj)/cpuflags.o
919e6abd2aSJosh Triplett
923afed06aSJosh Triplettvmlinux-objs-$(CONFIG_EARLY_PRINTK) += $(obj)/early_serial_console.o
939b238748SKees Cookvmlinux-objs-$(CONFIG_RANDOMIZE_BASE) += $(obj)/kaslr.o
943a94707dSKees Cookifdef CONFIG_X86_64
955f2bb016SJoerg Roedel	vmlinux-objs-y += $(obj)/ident_map_64.o
9664e68263SJoerg Roedel	vmlinux-objs-y += $(obj)/idt_64.o $(obj)/idt_handlers_64.o
9761de13dfSArd Biesheuvel	vmlinux-objs-$(CONFIG_AMD_MEM_ENCRYPT) += $(obj)/mem_encrypt.o
9808529078SKirill A. Shutemov	vmlinux-objs-y += $(obj)/pgtable_64.o
99ae862964SArd Biesheuvel	vmlinux-objs-$(CONFIG_AMD_MEM_ENCRYPT) += $(obj)/sev.o $(obj)/sev-handle-vc.o
1003a94707dSKees Cookendif
101291f3632SMatt Fleming
1023a63f70bSChao Fanvmlinux-objs-$(CONFIG_ACPI) += $(obj)/acpi.o
10375d090fdSKirill A. Shutemovvmlinux-objs-$(CONFIG_INTEL_TDX_GUEST) += $(obj)/tdx.o $(obj)/tdcall.o $(obj)/tdx-shared.o
104745e3ed8SKirill A. Shutemovvmlinux-objs-$(CONFIG_UNACCEPTED_MEMORY) += $(obj)/mem.o
1053a63f70bSChao Fan
1067c4146e8SMichael Rothvmlinux-objs-$(CONFIG_EFI) += $(obj)/efi.o
107b2747f10SBenjamin Segallvmlinux-libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
1085a67da1fSArd Biesheuvelvmlinux-libs-$(CONFIG_X86_64)	+= $(objtree)/arch/x86/boot/startup/lib.a
109*61b57d35SVitaly Kuznetsovvmlinux-objs-$(CONFIG_EFI_SBAT) += $(obj)/sbat.o
110*61b57d35SVitaly Kuznetsov
111*61b57d35SVitaly Kuznetsovifdef CONFIG_EFI_SBAT
112*61b57d35SVitaly Kuznetsov$(obj)/sbat.o: $(CONFIG_EFI_SBAT_FILE)
113*61b57d35SVitaly Kuznetsovendif
114291f3632SMatt Fleming
115b2747f10SBenjamin Segall$(obj)/vmlinux: $(vmlinux-objs-y) $(vmlinux-libs-y) FORCE
116527afc21SArvind Sankar	$(call if_changed,ld)
117db569afaSSam Ravnborg
118099e1377SIan CampbellOBJCOPYFLAGS_vmlinux.bin :=  -R .comment -S
119db569afaSSam Ravnborg$(obj)/vmlinux.bin: vmlinux FORCE
120db569afaSSam Ravnborg	$(call if_changed,objcopy)
121db569afaSSam Ravnborg
1229a1cb471SJosh Tripletttargets += $(patsubst $(obj)/%,%,$(vmlinux-objs-y)) vmlinux.bin.all vmlinux.relocs
123db569afaSSam Ravnborg
124e6a03a66SArd BiesheuvelCMD_RELOCS = arch/x86/tools/relocs
125e6a03a66SArd Biesheuvelquiet_cmd_relocs = RELOCS  $@
126e6a03a66SArd Biesheuvel      cmd_relocs = $(CMD_RELOCS) $< > $@;$(CMD_RELOCS) --abs-relocs $<
127e6a03a66SArd Biesheuvel
128e6a03a66SArd Biesheuvel$(obj)/vmlinux.relocs: vmlinux.unstripped FORCE
129e6a03a66SArd Biesheuvel	$(call if_changed,relocs)
130db569afaSSam Ravnborg
131db569afaSSam Ravnborgvmlinux.bin.all-y := $(obj)/vmlinux.bin
1325f11e020SH. Peter Anvinvmlinux.bin.all-$(CONFIG_X86_NEED_RELOCS) += $(obj)/vmlinux.relocs
133db569afaSSam Ravnborg
1345f11e020SH. Peter Anvin$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE
135db569afaSSam Ravnborg	$(call if_changed,gzip)
1365f11e020SH. Peter Anvin$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE
1377ce7e984SMasahiro Yamada	$(call if_changed,bzip2_with_size)
1385f11e020SH. Peter Anvin$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE
1397ce7e984SMasahiro Yamada	$(call if_changed,lzma_with_size)
14030314804SLasse Collin$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FORCE
1417ce7e984SMasahiro Yamada	$(call if_changed,xzkern_with_size)
14213510997SAlbin Tonnerre$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) FORCE
1437ce7e984SMasahiro Yamada	$(call if_changed,lzo_with_size)
144f9b493acSKyungsik Lee$(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y) FORCE
1457ce7e984SMasahiro Yamada	$(call if_changed,lz4_with_size)
146fb46d057SNick Terrell$(obj)/vmlinux.bin.zst: $(vmlinux.bin.all-y) FORCE
1477ce7e984SMasahiro Yamada	$(call if_changed,zstd22_with_size)
148db569afaSSam Ravnborg
149283ab1c0SH. Peter Anvinsuffix-$(CONFIG_KERNEL_GZIP)	:= gz
150283ab1c0SH. Peter Anvinsuffix-$(CONFIG_KERNEL_BZIP2)	:= bz2
151283ab1c0SH. Peter Anvinsuffix-$(CONFIG_KERNEL_LZMA)	:= lzma
15230314804SLasse Collinsuffix-$(CONFIG_KERNEL_XZ)	:= xz
15313510997SAlbin Tonnerresuffix-$(CONFIG_KERNEL_LZO) 	:= lzo
154f9b493acSKyungsik Leesuffix-$(CONFIG_KERNEL_LZ4) 	:= lz4
155fb46d057SNick Terrellsuffix-$(CONFIG_KERNEL_ZSTD)	:= zst
156ae03c499SAlain Knaff
15702a884c0SH. Peter Anvinquiet_cmd_mkpiggy = MKPIGGY $@
158172caf19SMasahiro Yamada      cmd_mkpiggy = $(obj)/mkpiggy $< > $@
15902a884c0SH. Peter Anvin
16002a884c0SH. Peter Anvintargets += piggy.S
16102a884c0SH. Peter Anvin$(obj)/piggy.S: $(obj)/vmlinux.bin.$(suffix-y) $(obj)/mkpiggy FORCE
16202a884c0SH. Peter Anvin	$(call if_changed,mkpiggy)
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