1 # SPDX-License-Identifier: GPL-2.0 <<
2 # 1 #
3 # linux/arch/x86/boot/compressed/Makefile !! 2 # linux/arch/i386/boot/compressed/Makefile
4 # 3 #
5 # create a compressed vmlinux image from the o 4 # create a compressed vmlinux image from the original vmlinux
6 # 5 #
7 # vmlinuz is: !! 6
8 # decompression code (*.o) !! 7 HEAD = head.o
9 # asm globals (piggy.S), including: !! 8 SYSTEM = $(TOPDIR)/vmlinux
10 # vmlinux.bin.(gz|bz2|lzma|...) !! 9
>> 10 OBJECTS = $(HEAD) misc.o
>> 11
>> 12 ZLDFLAGS = -e startup_32
>> 13
11 # 14 #
12 # vmlinux.bin is: !! 15 # ZIMAGE_OFFSET is the load offset of the compression loader
13 # vmlinux stripped of debugging and comm !! 16 # BZIMAGE_OFFSET is the load offset of the high loaded compression loader
14 # vmlinux.bin.all is: !! 17 #
15 # vmlinux.bin + vmlinux.relocs !! 18 ZIMAGE_OFFSET = 0x1000
16 # vmlinux.bin.(gz|bz2|lzma|...) is: !! 19 BZIMAGE_OFFSET = 0x100000
17 # (see scripts/Makefile.lib size_append) !! 20
18 # compressed vmlinux.bin.all + u32 size !! 21 ZLINKFLAGS = -Ttext $(ZIMAGE_OFFSET) $(ZLDFLAGS)
19 !! 22 BZLINKFLAGS = -Ttext $(BZIMAGE_OFFSET) $(ZLDFLAGS)
20 targets := vmlinux vmlinux.bin vmlinux.bin.gz !! 23
21 vmlinux.bin.xz vmlinux.bin.lzo vmlinux !! 24 all: vmlinux
22 !! 25
23 # CLANG_FLAGS must come before any cc-disable- !! 26 vmlinux: piggy.o $(OBJECTS)
24 # case of cross compiling, as it has the '--ta !! 27 $(LD) $(ZLINKFLAGS) -o vmlinux $(OBJECTS) piggy.o
25 # avoid errors with '-march=i386', and future !! 28
26 # be valid. !! 29 bvmlinux: piggy.o $(OBJECTS)
27 KBUILD_CFLAGS := -m$(BITS) -O2 $(CLANG_FLAGS) !! 30 $(LD) $(BZLINKFLAGS) -o bvmlinux $(OBJECTS) piggy.o
28 KBUILD_CFLAGS += -fno-strict-aliasing -fPIE !! 31
29 KBUILD_CFLAGS += -Wundef !! 32 head.o: head.S
30 KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING !! 33 $(CC) $(AFLAGS) -traditional -c head.S
31 cflags-$(CONFIG_X86_32) := -march=i386 !! 34
32 cflags-$(CONFIG_X86_64) := -mcmodel=small -mno !! 35 comma := ,
33 KBUILD_CFLAGS += $(cflags-y) !! 36
34 KBUILD_CFLAGS += -mno-mmx -mno-sse !! 37 misc.o: misc.c
35 KBUILD_CFLAGS += -ffreestanding -fshort-wchar !! 38 $(CC) $(CFLAGS) -DKBUILD_BASENAME=$(subst $(comma),_,$(subst -,_,$(*F))) -c misc.c
36 KBUILD_CFLAGS += -fno-stack-protector !! 39
37 KBUILD_CFLAGS += $(call cc-disable-warning, ad !! 40 piggy.o: $(SYSTEM)
38 KBUILD_CFLAGS += $(call cc-disable-warning, gn !! 41 tmppiggy=_tmp_$$$$piggy; \
39 KBUILD_CFLAGS += -Wno-pointer-sign !! 42 rm -f $$tmppiggy $$tmppiggy.gz $$tmppiggy.lnk; \
40 KBUILD_CFLAGS += $(call cc-option,-fmacro-pref !! 43 $(OBJCOPY) $(SYSTEM) $$tmppiggy; \
41 KBUILD_CFLAGS += -fno-asynchronous-unwind-tabl !! 44 gzip -f -9 < $$tmppiggy > $$tmppiggy.gz; \
42 KBUILD_CFLAGS += -D__DISABLE_EXPORTS !! 45 echo "SECTIONS { .data : { input_len = .; LONG(input_data_end - input_data) input_data = .; *(.data) input_data_end = .; }}" > $$tmppiggy.lnk; \
43 # Disable relocation relaxation in case the li !! 46 $(LD) -r -o piggy.o -b binary $$tmppiggy.gz -b elf32-i386 -T $$tmppiggy.lnk; \
44 KBUILD_CFLAGS += $(call cc-option,-Wa$(comma)- !! 47 rm -f $$tmppiggy $$tmppiggy.gz $$tmppiggy.lnk
45 KBUILD_CFLAGS += -include $(srctree)/include/l !! 48
46 !! 49 clean:
47 # sev.c indirectly includes inat-table.h which !! 50 rm -f vmlinux bvmlinux _tmp_*
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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