cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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Makefile (2876B)

      1# SPDX-License-Identifier: GPL-2.0
      2#
      3# Author: Huacai Chen <chenhuacai@loongson.cn>
      4# Copyright (C) 2020-2022 Loongson Technology Corporation Limited
      5
      6boot	:= arch/loongarch/boot
      7
      8KBUILD_DEFCONFIG := loongson3_defconfig
      9
     10KBUILD_IMAGE	= $(boot)/vmlinux
     11
     12#
     13# Select the object file format to substitute into the linker script.
     14#
     1564bit-tool-archpref	= loongarch64
     1632bit-bfd		= elf32-loongarch
     1764bit-bfd		= elf64-loongarch
     1832bit-emul		= elf32loongarch
     1964bit-emul		= elf64loongarch
     20
     21ifdef CONFIG_64BIT
     22tool-archpref		= $(64bit-tool-archpref)
     23UTS_MACHINE		:= loongarch64
     24endif
     25
     26ifneq ($(SUBARCH),$(ARCH))
     27  ifeq ($(CROSS_COMPILE),)
     28    CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux-  $(tool-archpref)-linux-gnu-  $(tool-archpref)-unknown-linux-gnu-)
     29  endif
     30endif
     31
     32ifdef CONFIG_64BIT
     33ld-emul			= $(64bit-emul)
     34cflags-y		+= -mabi=lp64s
     35endif
     36
     37cflags-y			+= -G0 -pipe -msoft-float
     38LDFLAGS_vmlinux			+= -G0 -static -n -nostdlib
     39KBUILD_AFLAGS_KERNEL		+= -Wa,-mla-global-with-pcrel
     40KBUILD_CFLAGS_KERNEL		+= -Wa,-mla-global-with-pcrel
     41KBUILD_AFLAGS_MODULE		+= -Wa,-mla-global-with-abs
     42KBUILD_CFLAGS_MODULE		+= -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs
     43
     44cflags-y += -ffreestanding
     45cflags-y += $(call cc-option, -mno-check-zero-division)
     46
     47load-y		= 0x9000000000200000
     48bootvars-y	= VMLINUX_LOAD_ADDRESS=$(load-y)
     49
     50KBUILD_AFLAGS	+= $(cflags-y)
     51KBUILD_CFLAGS	+= $(cflags-y)
     52KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
     53
     54# This is required to get dwarf unwinding tables into .debug_frame
     55# instead of .eh_frame so we don't discard them.
     56KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
     57
     58# Don't emit unaligned accesses.
     59# Not all LoongArch cores support unaligned access, and as kernel we can't
     60# rely on others to provide emulation for these accesses.
     61KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
     62
     63KBUILD_CFLAGS += -isystem $(shell $(CC) -print-file-name=include)
     64
     65KBUILD_LDFLAGS	+= -m $(ld-emul)
     66
     67ifdef CONFIG_LOONGARCH
     68CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
     69	egrep -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
     70	sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
     71endif
     72
     73head-y := arch/loongarch/kernel/head.o
     74
     75libs-y += arch/loongarch/lib/
     76
     77ifeq ($(KBUILD_EXTMOD),)
     78prepare: vdso_prepare
     79vdso_prepare: prepare0
     80	$(Q)$(MAKE) $(build)=arch/loongarch/vdso include/generated/vdso-offsets.h
     81endif
     82
     83PHONY += vdso_install
     84vdso_install:
     85	$(Q)$(MAKE) $(build)=arch/loongarch/vdso $@
     86
     87all:	$(KBUILD_IMAGE)
     88
     89$(KBUILD_IMAGE): vmlinux
     90	$(Q)$(MAKE) $(build)=$(boot) $(bootvars-y) $@
     91
     92install:
     93	$(Q)install -D -m 755 $(KBUILD_IMAGE) $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
     94	$(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
     95	$(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
     96
     97define archhelp
     98	echo '  install              - install kernel into $(INSTALL_PATH)'
     99	echo
    100endef