1#
2# arch/x86/boot/Makefile
3#
4# This file is subject to the terms and conditions of the GNU General Public
5# License.  See the file "COPYING" in the main directory of this archive
6# for more details.
7#
8# Copyright (C) 1994 by Linus Torvalds
9# Changed by many, many contributors over the years.
10#
11
12# Sanitizer runtimes are unavailable and cannot be linked for early boot code.
13KASAN_SANITIZE			:= n
14KCSAN_SANITIZE			:= n
15OBJECT_FILES_NON_STANDARD	:= y
16
17# Kernel does not boot with kcov instrumentation here.
18# One of the problems observed was insertion of __sanitizer_cov_trace_pc()
19# callback into middle of per-cpu data enabling code. Thus the callback observed
20# inconsistent state and crashed. We are interested mostly in syscall coverage,
21# so boot code is not interesting anyway.
22KCOV_INSTRUMENT		:= n
23
24# If you want to preset the SVGA mode, uncomment the next line and
25# set SVGA_MODE to whatever number you want.
26# Set it to -DSVGA_MODE=NORMAL_VGA if you just want the EGA/VGA mode.
27# The number is the same as you would ordinarily press at bootup.
28
29SVGA_MODE	:= -DSVGA_MODE=NORMAL_VGA
30
31targets		:= vmlinux.bin setup.bin setup.elf bzImage
32targets		+= fdimage fdimage144 fdimage288 image.iso hdimage
33subdir-		:= compressed
34
35setup-y		+= a20.o bioscall.o cmdline.o copy.o cpu.o cpuflags.o cpucheck.o
36setup-y		+= early_serial_console.o edd.o header.o main.o memory.o
37setup-y		+= pm.o pmjump.o printf.o regs.o string.o tty.o video.o
38setup-y		+= video-mode.o version.o
39setup-$(CONFIG_X86_APM_BOOT) += apm.o
40
41# The link order of the video-*.o modules can matter.  In particular,
42# video-vga.o *must* be listed first, followed by video-vesa.o.
43# Hardware-specific drivers should follow in the order they should be
44# probed, and video-bios.o should typically be last.
45setup-y		+= video-vga.o
46setup-y		+= video-vesa.o
47setup-y		+= video-bios.o
48
49targets		+= $(setup-y)
50hostprogs	:= tools/build
51hostprogs	+= mkcpustr
52
53HOST_EXTRACFLAGS += -I$(srctree)/tools/include \
54		    -include include/generated/autoconf.h \
55	            -D__EXPORTED_HEADERS__
56
57ifdef CONFIG_X86_FEATURE_NAMES
58$(obj)/cpu.o: $(obj)/cpustr.h
59
60quiet_cmd_cpustr = CPUSTR  $@
61      cmd_cpustr = $(obj)/mkcpustr > $@
62$(obj)/cpustr.h: $(obj)/mkcpustr FORCE
63	$(call if_changed,cpustr)
64endif
65targets += cpustr.h
66
67# ---------------------------------------------------------------------------
68
69KBUILD_CFLAGS	:= $(REALMODE_CFLAGS) -D_SETUP
70KBUILD_AFLAGS	:= $(KBUILD_CFLAGS) -D__ASSEMBLY__
71KBUILD_CFLAGS	+= $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
72KBUILD_CFLAGS	+= -fno-asynchronous-unwind-tables
73GCOV_PROFILE := n
74UBSAN_SANITIZE := n
75
76$(obj)/bzImage: asflags-y  := $(SVGA_MODE)
77
78quiet_cmd_image = BUILD   $@
79silent_redirect_image = >/dev/null
80cmd_image = $(obj)/tools/build $(obj)/setup.bin $(obj)/vmlinux.bin \
81			       $(obj)/zoffset.h $@ $($(quiet)redirect_image)
82
83$(obj)/bzImage: $(obj)/setup.bin $(obj)/vmlinux.bin $(obj)/tools/build FORCE
84	$(call if_changed,image)
85	@$(kecho) 'Kernel: $@ is ready' ' (#'`cat .version`')'
86
87OBJCOPYFLAGS_vmlinux.bin := -O binary -R .note -R .comment -S
88$(obj)/vmlinux.bin: $(obj)/compressed/vmlinux FORCE
89	$(call if_changed,objcopy)
90
91SETUP_OBJS = $(addprefix $(obj)/,$(setup-y))
92
93sed-zoffset := -e 's/^\([0-9a-fA-F]*\) [a-zA-Z] \(startup_32\|startup_64\|efi32_stub_entry\|efi64_stub_entry\|efi_pe_entry\|efi32_pe_entry\|input_data\|kernel_info\|_end\|_ehead\|_text\|z_.*\)$$/\#define ZO_\2 0x\1/p'
94
95quiet_cmd_zoffset = ZOFFSET $@
96      cmd_zoffset = $(NM) $< | sed -n $(sed-zoffset) > $@
97
98targets += zoffset.h
99$(obj)/zoffset.h: $(obj)/compressed/vmlinux FORCE
100	$(call if_changed,zoffset)
101
102
103AFLAGS_header.o += -I$(objtree)/$(obj)
104$(obj)/header.o: $(obj)/zoffset.h
105
106LDFLAGS_setup.elf	:= -m elf_i386 -T
107$(obj)/setup.elf: $(src)/setup.ld $(SETUP_OBJS) FORCE
108	$(call if_changed,ld)
109
110OBJCOPYFLAGS_setup.bin	:= -O binary
111$(obj)/setup.bin: $(obj)/setup.elf FORCE
112	$(call if_changed,objcopy)
113
114$(obj)/compressed/vmlinux: FORCE
115	$(Q)$(MAKE) $(build)=$(obj)/compressed $@
116
117# Set this if you want to pass append arguments to the
118# bzdisk/fdimage/hdimage/isoimage kernel
119FDARGS =
120# Set this if you want one or more initrds included in the image
121FDINITRD =
122
123imgdeps = $(obj)/bzImage $(obj)/mtools.conf $(src)/genimage.sh
124
125$(obj)/mtools.conf: $(src)/mtools.conf.in
126	sed -e 's|@OBJ@|$(obj)|g' < $< > $@
127
128targets += mtools.conf
129
130# genimage.sh requires bash, but it also has a bunch of other
131# external dependencies.
132quiet_cmd_genimage = GENIMAGE $3
133cmd_genimage = $(BASH) $(srctree)/$(src)/genimage.sh $2 $3 $(obj)/bzImage \
134		$(obj)/mtools.conf '$(FDARGS)' $(FDINITRD)
135
136PHONY += bzdisk fdimage fdimage144 fdimage288 hdimage isoimage
137
138# This requires write access to /dev/fd0
139# All images require syslinux to be installed; hdimage also requires
140# EDK2/OVMF if the kernel is compiled with the EFI stub.
141bzdisk: $(imgdeps)
142	$(call cmd,genimage,bzdisk,/dev/fd0)
143
144fdimage fdimage144: $(imgdeps)
145	$(call cmd,genimage,fdimage144,$(obj)/fdimage)
146	@$(kecho) 'Kernel: $(obj)/fdimage is ready'
147
148fdimage288: $(imgdeps)
149	$(call cmd,genimage,fdimage288,$(obj)/fdimage)
150	@$(kecho) 'Kernel: $(obj)/fdimage is ready'
151
152hdimage: $(imgdeps)
153	$(call cmd,genimage,hdimage,$(obj)/hdimage)
154	@$(kecho) 'Kernel: $(obj)/hdimage is ready'
155
156isoimage: $(imgdeps)
157	$(call cmd,genimage,isoimage,$(obj)/image.iso)
158	@$(kecho) 'Kernel: $(obj)/image.iso is ready'
159