1 # SPDX-License-Identifier: GPL-2.0
2 #
3 # linux/arch/x86/boot/compressed/Makefile
4 #
5 # create a compressed vmlinux image from the o
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 comm
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
19
20 targets := vmlinux vmlinux.bin vmlinux.bin.gz
21 vmlinux.bin.xz vmlinux.bin.lzo vmlinux
22
23 # CLANG_FLAGS must come before any cc-disable-
24 # case of cross compiling, as it has the '--ta
25 # avoid errors with '-march=i386', and future
26 # be valid.
27 KBUILD_CFLAGS := -m$(BITS) -O2 $(CLANG_FLAGS)
28 KBUILD_CFLAGS += -fno-strict-aliasing -fPIE
29 KBUILD_CFLAGS += -Wundef
30 KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING
31 cflags-$(CONFIG_X86_32) := -march=i386
32 cflags-$(CONFIG_X86_64) := -mcmodel=small -mno
33 KBUILD_CFLAGS += $(cflags-y)
34 KBUILD_CFLAGS += -mno-mmx -mno-sse
35 KBUILD_CFLAGS += -ffreestanding -fshort-wchar
36 KBUILD_CFLAGS += -fno-stack-protector
37 KBUILD_CFLAGS += $(call cc-disable-warning, ad
38 KBUILD_CFLAGS += $(call cc-disable-warning, gn
39 KBUILD_CFLAGS += -Wno-pointer-sign
40 KBUILD_CFLAGS += $(call cc-option,-fmacro-pref
41 KBUILD_CFLAGS += -fno-asynchronous-unwind-tabl
42 KBUILD_CFLAGS += -D__DISABLE_EXPORTS
43 # Disable relocation relaxation in case the li
44 KBUILD_CFLAGS += $(call cc-option,-Wa$(comma)-
45 KBUILD_CFLAGS += -include $(srctree)/include/l
46
47 # sev.c indirectly includes inat-table.h which
48 # compilation and stored in $(objtree). Add th
49 # that the compiler finds it even with out-of-
50 CFLAGS_sev.o += -I$(objtree)/arch/x86/lib/
51
52 KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBL
53
54 KBUILD_LDFLAGS := -m elf_$(UTS_MACHINE)
55 KBUILD_LDFLAGS += $(call ld-option,--no-ld-gen
56 # Compressed kernel should be built as PIE sin
57 # address by the bootloader.
58 LDFLAGS_vmlinux := -pie $(call ld-option, --no
59 ifdef CONFIG_LD_ORPHAN_WARN
60 LDFLAGS_vmlinux += --orphan-handling=$(CONFIG_
61 endif
62 LDFLAGS_vmlinux += -z noexecstack
63 ifeq ($(CONFIG_LD_IS_BFD),y)
64 LDFLAGS_vmlinux += $(call ld-option,--no-warn-
65 endif
66 ifeq ($(CONFIG_EFI_STUB),y)
67 # ensure that the static EFI stub library will
68 # never referenced explicitly from the startup
69 LDFLAGS_vmlinux += -u efi_pe_entry
70 endif
71 LDFLAGS_vmlinux += -T
72
73 hostprogs := mkpiggy
74 HOST_EXTRACFLAGS += -I$(srctree)/tools/include
75
76 sed-voffset := -e 's/^\([0-9a-fA-F]*\) [ABCDGR
77
78 quiet_cmd_voffset = VOFFSET $@
79 cmd_voffset = $(NM) $< | sed -n $(sed-vo
80
81 targets += ../voffset.h
82
83 $(obj)/../voffset.h: vmlinux FORCE
84 $(call if_changed,voffset)
85
86 $(obj)/misc.o: $(obj)/../voffset.h
87
88 vmlinux-objs-y := $(obj)/vmlinux.lds $(obj)/ke
89 $(obj)/misc.o $(obj)/string.o $(obj)/c
90 $(obj)/piggy.o $(obj)/cpuflags.o
91
92 vmlinux-objs-$(CONFIG_EARLY_PRINTK) += $(obj)/
93 vmlinux-objs-$(CONFIG_RANDOMIZE_BASE) += $(obj
94 ifdef CONFIG_X86_64
95 vmlinux-objs-y += $(obj)/ident_map_64.
96 vmlinux-objs-y += $(obj)/idt_64.o $(ob
97 vmlinux-objs-$(CONFIG_AMD_MEM_ENCRYPT)
98 vmlinux-objs-y += $(obj)/pgtable_64.o
99 vmlinux-objs-$(CONFIG_AMD_MEM_ENCRYPT)
100 endif
101
102 vmlinux-objs-$(CONFIG_ACPI) += $(obj)/acpi.o
103 vmlinux-objs-$(CONFIG_INTEL_TDX_GUEST) += $(ob
104 vmlinux-objs-$(CONFIG_UNACCEPTED_MEMORY) += $(
105
106 vmlinux-objs-$(CONFIG_EFI) += $(obj)/efi.o
107 vmlinux-objs-$(CONFIG_EFI_MIXED) += $(obj)/efi
108 vmlinux-libs-$(CONFIG_EFI_STUB) += $(objtree)/
109
110 $(obj)/vmlinux: $(vmlinux-objs-y) $(vmlinux-li
111 $(call if_changed,ld)
112
113 OBJCOPYFLAGS_vmlinux.bin := -R .comment -S
114 $(obj)/vmlinux.bin: vmlinux FORCE
115 $(call if_changed,objcopy)
116
117 targets += $(patsubst $(obj)/%,%,$(vmlinux-obj
118
119 # vmlinux.relocs is created by the vmlinux pos
120 $(obj)/vmlinux.relocs: vmlinux
121 @true
122
123 vmlinux.bin.all-y := $(obj)/vmlinux.bin
124 vmlinux.bin.all-$(CONFIG_X86_NEED_RELOCS) += $
125
126 $(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FO
127 $(call if_changed,gzip)
128 $(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) F
129 $(call if_changed,bzip2_with_size)
130 $(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y)
131 $(call if_changed,lzma_with_size)
132 $(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y) FO
133 $(call if_changed,xzkern_with_size)
134 $(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y) F
135 $(call if_changed,lzo_with_size)
136 $(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y) F
137 $(call if_changed,lz4_with_size)
138 $(obj)/vmlinux.bin.zst: $(vmlinux.bin.all-y) F
139 $(call if_changed,zstd22_with_size)
140
141 suffix-$(CONFIG_KERNEL_GZIP) := gz
142 suffix-$(CONFIG_KERNEL_BZIP2) := bz2
143 suffix-$(CONFIG_KERNEL_LZMA) := lzma
144 suffix-$(CONFIG_KERNEL_XZ) := xz
145 suffix-$(CONFIG_KERNEL_LZO) := lzo
146 suffix-$(CONFIG_KERNEL_LZ4) := lz4
147 suffix-$(CONFIG_KERNEL_ZSTD) := zst
148
149 quiet_cmd_mkpiggy = MKPIGGY $@
150 cmd_mkpiggy = $(obj)/mkpiggy $< > $@
151
152 targets += piggy.S
153 $(obj)/piggy.S: $(obj)/vmlinux.bin.$(suffix-y)
154 $(call if_changed,mkpiggy)
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