^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) # SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) # Unified Makefile for i386 and x86_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) # select defconfig based on actual architecture
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) ifeq ($(ARCH),x86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) ifeq ($(shell uname -m),x86_64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) KBUILD_DEFCONFIG := x86_64_defconfig
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) KBUILD_DEFCONFIG := i386_defconfig
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) KBUILD_DEFCONFIG := $(ARCH)_defconfig
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) # For gcc stack alignment is specified with -mpreferred-stack-boundary,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) # clang has the option -mstack-alignment for that purpose.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) ifneq ($(call cc-option, -mpreferred-stack-boundary=4),)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) cc_stack_align4 := -mpreferred-stack-boundary=2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) cc_stack_align8 := -mpreferred-stack-boundary=3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) else ifneq ($(call cc-option, -mstack-alignment=16),)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) cc_stack_align4 := -mstack-alignment=4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) cc_stack_align8 := -mstack-alignment=8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) # How to compile the 16-bit code. Note we always compile for -march=i386;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) # that way we can complain to the user if the CPU is insufficient.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) # The -m16 option is supported by GCC >= 4.9 and clang >= 3.5. For
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) # older versions of GCC, include an *assembly* header to make sure that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) # gcc doesn't play any games behind our back.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) CODE16GCC_CFLAGS := -m32 -Wa,$(srctree)/arch/x86/boot/code16gcc.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) M16_CFLAGS := $(call cc-option, -m16, $(CODE16GCC_CFLAGS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -DDISABLE_BRANCH_PROFILING \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) -fno-strict-aliasing -fomit-frame-pointer -fno-pic \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) -mno-mmx -mno-sse $(call cc-option,-fcf-protection=none)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) REALMODE_CFLAGS += -ffreestanding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) REALMODE_CFLAGS += -fno-stack-protector
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), -Wno-address-of-packed-member)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) REALMODE_CFLAGS += $(call __cc-option, $(CC), $(REALMODE_CFLAGS), $(cc_stack_align4))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) REALMODE_CFLAGS += $(CLANG_FLAGS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) export REALMODE_CFLAGS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) # BITS is used as extension for files which are available in a 32 bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) # and a 64 bit version to simplify shared Makefiles.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) # e.g.: obj-y += foo_$(BITS).o
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) export BITS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) # Prevent GCC from generating any FP code by mistake.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) # This must happen before we try the -mpreferred-stack-boundary, see:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) KBUILD_CFLAGS += $(call cc-option,-mno-avx,)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) # Intel CET isn't enabled in the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) ifeq ($(CONFIG_X86_32),y)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) BITS := 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) UTS_MACHINE := i386
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) CHECKFLAGS += -D__i386__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) biarch := $(call cc-option,-m32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) KBUILD_AFLAGS += $(biarch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) KBUILD_CFLAGS += $(biarch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) KBUILD_CFLAGS += -msoft-float -mregparm=3 -freg-struct-return
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) # Never want PIC in a 32-bit kernel, prevent breakage with GCC built
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) # with nonstandard options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) KBUILD_CFLAGS += -fno-pic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) # Align the stack to the register width instead of using the default
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) # alignment of 16 bytes. This reduces stack usage and the number of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) # alignment instructions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) KBUILD_CFLAGS += $(call cc-option,$(cc_stack_align4))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) # CPU-specific tuning. Anything which can be shared with UML should go here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) include arch/x86/Makefile_32.cpu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) KBUILD_CFLAGS += $(cflags-y)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) # temporary until string.h is fixed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) KBUILD_CFLAGS += -ffreestanding
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) BITS := 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) UTS_MACHINE := x86_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) CHECKFLAGS += -D__x86_64__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) biarch := -m64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) KBUILD_AFLAGS += -m64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) KBUILD_CFLAGS += -m64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) # Align jump targets to 1 byte, not the default 16 bytes:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) KBUILD_CFLAGS += $(call cc-option,-falign-jumps=1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) # Pack loops tightly as well:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) KBUILD_CFLAGS += $(call cc-option,-falign-loops=1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) # Don't autogenerate traditional x87 instructions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) KBUILD_CFLAGS += $(call cc-option,-mno-80387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) # By default gcc and clang use a stack alignment of 16 bytes for x86.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) # However the standard kernel entry on x86-64 leaves the stack on an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) # 8-byte boundary. If the compiler isn't informed about the actual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) # alignment it will generate extra alignment instructions for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) # default alignment which keep the stack *mis*aligned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) # Furthermore an alignment to the register width reduces stack usage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) # and the number of alignment instructions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) KBUILD_CFLAGS += $(call cc-option,$(cc_stack_align8))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) # Use -mskip-rax-setup if supported.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) cflags-$(CONFIG_MCORE2) += \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) $(call cc-option,-march=core2,$(call cc-option,-mtune=generic))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) cflags-$(CONFIG_MATOM) += $(call cc-option,-march=atom) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) $(call cc-option,-mtune=atom,$(call cc-option,-mtune=generic))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) cflags-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=generic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) KBUILD_CFLAGS += $(cflags-y)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) KBUILD_CFLAGS += -mno-red-zone
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) KBUILD_CFLAGS += -mcmodel=kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) ifdef CONFIG_X86_X32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) x32_ld_ok := $(call try-run,\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /bin/echo -e '1: .quad 1b' | \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" - && \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) $(OBJCOPY) -O elf32-x86-64 "$$TMP" "$$TMPO" && \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) $(LD) -m elf32_x86_64 "$$TMPO" -o "$$TMP",y,n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) ifeq ($(x32_ld_ok),y)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) CONFIG_X86_X32_ABI := y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) KBUILD_AFLAGS += -DCONFIG_X86_X32_ABI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) KBUILD_CFLAGS += -DCONFIG_X86_X32_ABI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) $(warning CONFIG_X86_X32 enabled but no binutils support)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) export CONFIG_X86_X32_ABI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) # If the function graph tracer is used with mcount instead of fentry,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) # '-maccumulate-outgoing-args' is needed to prevent a GCC bug
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) # (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=42109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) ifdef CONFIG_FUNCTION_GRAPH_TRACER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) ifndef CONFIG_HAVE_FENTRY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) ACCUMULATE_OUTGOING_ARGS := 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) ifeq ($(call cc-option-yn, -mfentry), n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) ACCUMULATE_OUTGOING_ARGS := 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) # GCC ignores '-maccumulate-outgoing-args' when used with '-Os'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) # If '-Os' is enabled, disable it and print a warning.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) undefine CONFIG_CC_OPTIMIZE_FOR_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) $(warning Disabling CONFIG_CC_OPTIMIZE_FOR_SIZE. Your compiler does not have -mfentry so you cannot optimize for size with CONFIG_FUNCTION_GRAPH_TRACER.)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) # This compiler flag is not supported by Clang:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) # Workaround for a gcc prelease that unfortunately was shipped in a suse release
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) KBUILD_CFLAGS += -Wno-sign-compare
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) # Avoid indirect branches in kernel to deal with Spectre
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) ifdef CONFIG_RETPOLINE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) KBUILD_CFLAGS += $(RETPOLINE_CFLAGS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) # Additionally, avoid generating expensive indirect jumps which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) # are subject to retpolines for small number of switch cases.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) # clang turns off jump table generation by default when under
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) # retpoline builds, however, gcc does not for x86. This has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) # only been fixed starting from gcc stable version 8.4.0 and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) # onwards, but not for older ones. See gcc bug #86952.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) ifndef CONFIG_CC_IS_CLANG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) KBUILD_CFLAGS += $(call cc-option,-fno-jump-tables)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) KBUILD_LDFLAGS += -m elf_$(UTS_MACHINE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) ifdef CONFIG_LTO_CLANG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 130000; echo $$?),0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) KBUILD_LDFLAGS += -plugin-opt=-stack-alignment=$(if $(CONFIG_X86_32),4,8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) ifdef CONFIG_X86_NEED_RELOCS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) LDFLAGS_vmlinux := --emit-relocs --discard-none
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) LDFLAGS_vmlinux :=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) # The 64-bit kernel must be aligned to 2MB. Pass -z max-page-size=0x200000 to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) # the linker to force 2MB page size regardless of the default page size used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) # by the linker.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) #
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) ifdef CONFIG_X86_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) LDFLAGS_vmlinux += -z max-page-size=0x200000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) archscripts: scripts_basic
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) $(Q)$(MAKE) $(build)=arch/x86/tools relocs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) ###
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) # Syscall table generation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) archheaders:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) $(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) ###
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) # Kernel objects
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) head-y := arch/x86/kernel/head_$(BITS).o
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) head-y += arch/x86/kernel/head$(BITS).o
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) head-y += arch/x86/kernel/ebda.o
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) head-y += arch/x86/kernel/platform-quirks.o
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) libs-y += arch/x86/lib/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) # See arch/x86/Kbuild for content of core part of the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) core-y += arch/x86/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) # drivers-y are linked after core-y
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) drivers-$(CONFIG_MATH_EMULATION) += arch/x86/math-emu/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) drivers-$(CONFIG_PCI) += arch/x86/pci/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) # must be linked after kernel/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) # suspend and hibernation support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) drivers-$(CONFIG_PM) += arch/x86/power/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) drivers-$(CONFIG_FB) += arch/x86/video/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) ####
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) # boot loader support. Several targets are kept for legacy purposes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) boot := arch/x86/boot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) BOOT_TARGETS = bzdisk fdimage fdimage144 fdimage288 isoimage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) PHONY += bzImage $(BOOT_TARGETS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) # Don't compile Image in mixed build with "all" target
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) ifndef KBUILD_MIXED_TREE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) # Default kernel to build
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) all: bzImage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) # KBUILD_IMAGE specify target image being built
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) KBUILD_IMAGE := $(boot)/bzImage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) bzImage: vmlinux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) ifeq ($(CONFIG_X86_DECODER_SELFTEST),y)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) $(Q)$(MAKE) $(build)=arch/x86/tools posttest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) $(Q)$(MAKE) $(build)=$(boot) $(KBUILD_IMAGE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) $(Q)mkdir -p $(objtree)/arch/$(UTS_MACHINE)/boot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) $(Q)ln -fsn ../../x86/boot/bzImage $(objtree)/arch/$(UTS_MACHINE)/boot/$@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) $(BOOT_TARGETS): vmlinux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) $(Q)$(MAKE) $(build)=$(boot) $@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) PHONY += install bzlilo
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) install bzlilo:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) $(Q)$(MAKE) $(build)=$(boot) $@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) PHONY += vdso_install
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) vdso_install:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) $(Q)$(MAKE) $(build)=arch/x86/entry/vdso $@
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) archprepare: checkbin
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) checkbin:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) ifndef CONFIG_CC_HAS_ASM_GOTO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) @echo Compiler lacks asm-goto support.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) @exit 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) ifdef CONFIG_RETPOLINE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) ifeq ($(RETPOLINE_CFLAGS),)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) @echo "You are building kernel with non-retpoline compiler." >&2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) @echo "Please update your compiler." >&2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) @false
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) archclean:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) $(Q)rm -rf $(objtree)/arch/i386
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) $(Q)rm -rf $(objtree)/arch/x86_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) $(Q)$(MAKE) $(clean)=$(boot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) $(Q)$(MAKE) $(clean)=arch/x86/tools
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) define archhelp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) echo ' install - Install kernel using'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) echo ' (your) ~/bin/$(INSTALLKERNEL) or'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) echo ' (distribution) /sbin/$(INSTALLKERNEL) or'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) echo ' install to $$(INSTALL_PATH) and run lilo'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) echo ' fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) echo ' fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) echo ' fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) echo ' isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) echo ' bzdisk/fdimage*/isoimage also accept:'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) echo ' FDARGS="..." arguments for the booted kernel'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) echo ' FDINITRD=file initrd for the booted kernel'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) endef
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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