1# SPDX-License-Identifier: GPL-2.0 2core-y += arch/x86/crypto/ 3 4ifeq ($(CONFIG_X86_32),y) 5START := 0x8048000 6 7KBUILD_LDFLAGS += -m elf_i386 8ELF_ARCH := i386 9ELF_FORMAT := elf32-i386 10CHECKFLAGS += -D__i386__ 11 12KBUILD_CFLAGS += $(call cc-option,-m32) 13KBUILD_AFLAGS += $(call cc-option,-m32) 14LINK-y += $(call cc-option,-m32) 15 16LDS_EXTRA := -Ui386 17export LDS_EXTRA 18 19# First of all, tune CFLAGS for the specific CPU. This actually sets cflags-y. 20include arch/x86/Makefile_32.cpu 21 22# prevent gcc from keeping the stack 16 byte aligned. Taken from i386. 23cflags-y += $(call cc-option,-mpreferred-stack-boundary=2) 24 25# Prevent sprintf in nfsd from being converted to strcpy and resulting in 26# an unresolved reference. 27cflags-y += -ffreestanding 28 29# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use 30# a lot more stack due to the lack of sharing of stacklots. Also, gcc 31# 4.3.0 needs -funit-at-a-time for extern inline functions. 32KBUILD_CFLAGS += $(shell if [ $(cc-version) -lt 0400 ] ; then \ 33 echo $(call cc-option,-fno-unit-at-a-time); \ 34 else echo $(call cc-option,-funit-at-a-time); fi ;) 35 36KBUILD_CFLAGS += $(cflags-y) 37 38else 39 40START := 0x60000000 41 42KBUILD_CFLAGS += -fno-builtin -m64 43 44CHECKFLAGS += -m64 -D__x86_64__ 45KBUILD_AFLAGS += -m64 46KBUILD_LDFLAGS += -m elf_x86_64 47KBUILD_CPPFLAGS += -m64 48 49ELF_ARCH := i386:x86-64 50ELF_FORMAT := elf64-x86-64 51 52# Not on all 64-bit distros /lib is a symlink to /lib64. PLD is an example. 53 54LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib64 55LINK-y += -m64 56 57# Do unit-at-a-time unconditionally on x86_64, following the host 58KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 59endif 60