ce697ccee1
Kbuild puts the objects listed in head-y at the head of vmlinux. Conventionally, we do this for head*.S, which contains the kernel entry point. A counter approach is to control the section order by the linker script. Actually, the code marked as __HEAD goes into the ".head.text" section, which is placed before the normal ".text" section. I do not know if both of them are needed. From the build system perspective, head-y is not mandatory. If you can achieve the proper code placement by the linker script only, it would be cleaner. I collected the current head-y objects into head-object-list.txt. It is a whitelist. My hope is it will be reduced in the long run. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
2.6 KiB
SPDX-License-Identifier: GPL-2.0
sparc/Makefile
Makefile for the architecture dependent flags and dependencies on the
Sparc and sparc64.
Copyright (C) 1994,1996,1998 David S. Miller (davem@caip.rutgers.edu)
Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
We are not yet configured - so test on arch
ifeq ($(ARCH),sparc64) KBUILD_DEFCONFIG := sparc64_defconfig else KBUILD_DEFCONFIG := sparc32_defconfig endif
ifeq ($(CONFIG_SPARC32),y)
sparc32
CHECKFLAGS += -D__sparc__ KBUILD_LDFLAGS := -m elf32_sparc export BITS := 32 UTS_MACHINE := sparc
We are adding -Wa,-Av8 to KBUILD_CFLAGS to deal with a specs bug in some
versions of gcc. Some gcc versions won't pass -Av8 to binutils when you
give -mcpu=v8. This silently worked with older bintutils versions but
does not any more.
KBUILD_CFLAGS += -m32 -mcpu=v8 -pipe -mno-fpu -fcall-used-g5 -fcall-used-g7 KBUILD_CFLAGS += -Wa,-Av8
KBUILD_AFLAGS += -m32 -Wa,-Av8
else
sparc64
CHECKFLAGS += -D__sparc__ -D__sparc_v9__ -D__arch64__ KBUILD_LDFLAGS := -m elf64_sparc export BITS := 64 UTS_MACHINE := sparc64
KBUILD_CFLAGS += -m64 -pipe -mno-fpu -mcpu=ultrasparc -mcmodel=medlow KBUILD_CFLAGS += -ffixed-g4 -ffixed-g5 -fcall-used-g7 -Wno-sign-compare KBUILD_CFLAGS += -Wa,--undeclared-regs KBUILD_CFLAGS += $(call cc-option,-mtune=ultrasparc3) KBUILD_AFLAGS += -m64 -mcpu=ultrasparc -Wa,--undeclared-regs
ifeq ($(CONFIG_MCOUNT),y) KBUILD_CFLAGS += -pg endif
endif
libs-y += arch/sparc/prom/ libs-y += arch/sparc/lib/
drivers-$(CONFIG_PM) += arch/sparc/power/
boot := arch/sparc/boot
Default target
all: zImage
image zImage uImage tftpboot.img vmlinux.aout: vmlinux $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
install: $(call cmd,install)
archheaders: $(Q)$(MAKE) $(build)=arch/sparc/kernel/syscalls all
PHONY += vdso_install vdso_install: $(Q)$(MAKE) $(build)=arch/sparc/vdso $@
This is the image used for packaging
KBUILD_IMAGE := $(boot)/zImage
Don't use tabs in echo arguments.
ifeq ($(ARCH),sparc) define archhelp echo '* image - kernel image ($(boot)/image)' echo '* zImage - stripped kernel image ($(boot)/zImage)' echo ' uImage - U-Boot SPARC32 Image (only for LEON)' echo ' tftpboot.img - image prepared for tftp' endef else define archhelp echo '* vmlinux - standard sparc64 kernel' echo '* zImage - stripped and compressed sparc64 kernel ($(boot)/zImage)' echo ' vmlinux.aout - a.out kernel for sparc64' echo ' tftpboot.img - image prepared for tftp' endef endif