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: $(obj)/zoffset.h 105 106LDFLAGS_setup.elf := -m elf_i386 -z noexecstack -T 107$(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