diff options
Diffstat (limited to 'arch/x86/Makefile.um')
| -rw-r--r-- | arch/x86/Makefile.um | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/x86/Makefile.um b/arch/x86/Makefile.um new file mode 100644 index 000000000..91085a08d --- /dev/null +++ b/arch/x86/Makefile.um @@ -0,0 +1,59 @@ +# SPDX-License-Identifier: GPL-2.0 +core-y += arch/x86/crypto/ + +ifeq ($(CONFIG_X86_32),y) +START := 0x8048000 + +KBUILD_LDFLAGS += -m elf_i386 +ELF_ARCH := i386 +ELF_FORMAT := elf32-i386 +CHECKFLAGS += -D__i386__ + +KBUILD_CFLAGS += $(call cc-option,-m32) +KBUILD_AFLAGS += $(call cc-option,-m32) +LINK-y += $(call cc-option,-m32) + +LDS_EXTRA := -Ui386 +export LDS_EXTRA + +# First of all, tune CFLAGS for the specific CPU. This actually sets cflags-y. +include arch/x86/Makefile_32.cpu + +# prevent gcc from keeping the stack 16 byte aligned. Taken from i386. +cflags-y += $(call cc-option,-mpreferred-stack-boundary=2) + +# Prevent sprintf in nfsd from being converted to strcpy and resulting in +# an unresolved reference. +cflags-y += -ffreestanding + +# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use +# a lot more stack due to the lack of sharing of stacklots. Also, gcc +# 4.3.0 needs -funit-at-a-time for extern inline functions. +KBUILD_CFLAGS += $(shell if [ $(cc-version) -lt 0400 ] ; then \ + echo $(call cc-option,-fno-unit-at-a-time); \ + else echo $(call cc-option,-funit-at-a-time); fi ;) + +KBUILD_CFLAGS += $(cflags-y) + +else + +START := 0x60000000 + +KBUILD_CFLAGS += -fno-builtin -m64 + +CHECKFLAGS += -m64 -D__x86_64__ +KBUILD_AFLAGS += -m64 +KBUILD_LDFLAGS += -m elf_x86_64 +KBUILD_CPPFLAGS += -m64 + +ELF_ARCH := i386:x86-64 +ELF_FORMAT := elf64-x86-64 + +# Not on all 64-bit distros /lib is a symlink to /lib64. PLD is an example. + +LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib64 +LINK-y += -m64 + +# Do unit-at-a-time unconditionally on x86_64, following the host +KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) +endif |