| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | core-y += arch/x86/crypto/ |
| 3 | |
| 4 | ifeq ($(CONFIG_X86_32),y) |
| 5 | START := 0x8048000 |
| 6 | |
| 7 | KBUILD_LDFLAGS += -m elf_i386 |
| 8 | ELF_ARCH := i386 |
| 9 | ELF_FORMAT := elf32-i386 |
| 10 | CHECKFLAGS += -D__i386__ |
| 11 | |
| 12 | KBUILD_CFLAGS += $(call cc-option,-m32) |
| 13 | KBUILD_AFLAGS += $(call cc-option,-m32) |
| 14 | LINK-y += $(call cc-option,-m32) |
| 15 | |
| 16 | LDS_EXTRA := -Ui386 |
| 17 | export LDS_EXTRA |
| 18 | |
| 19 | # First of all, tune CFLAGS for the specific CPU. This actually sets cflags-y. |
| 20 | include arch/x86/Makefile_32.cpu |
| 21 | |
| 22 | # prevent gcc from keeping the stack 16 byte aligned. Taken from i386. |
| 23 | cflags-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. |
| 27 | cflags-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. |
| 32 | KBUILD_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 | |
| 36 | KBUILD_CFLAGS += $(cflags-y) |
| 37 | |
| 38 | else |
| 39 | |
| 40 | START := 0x60000000 |
| 41 | |
| 42 | KBUILD_CFLAGS += -fno-builtin -m64 |
| 43 | |
| 44 | CHECKFLAGS += -m64 -D__x86_64__ |
| 45 | KBUILD_AFLAGS += -m64 |
| 46 | KBUILD_LDFLAGS += -m elf_x86_64 |
| 47 | KBUILD_CPPFLAGS += -m64 |
| 48 | |
| 49 | ELF_ARCH := i386:x86-64 |
| 50 | ELF_FORMAT := elf64-x86-64 |
| 51 | |
| 52 | # Not on all 64-bit distros /lib is a symlink to /lib64. PLD is an example. |
| 53 | |
| 54 | LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib64 |
| 55 | LINK-y += -m64 |
| 56 | |
| 57 | # Do unit-at-a-time unconditionally on x86_64, following the host |
| 58 | KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) |
| 59 | endif |