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>
3.8 KiB
m68k/Makefile
This file is included by the global makefile so that you can add your own
architecture-specific flags and dependencies.
This file is subject to the terms and conditions of the GNU General Public
License. See the file "COPYING" in the main directory of this archive
for more details.
Copyright (C) 1994 by Hamish Macdonald
Copyright (C) 2002,2011 Greg Ungerer gerg@snapgear.com
KBUILD_DEFCONFIG := multi_defconfig
ifdef cross_compiling
ifeq ($(CROSS_COMPILE),)
CROSS_COMPILE := $(call cc-cross-prefix,
m68k-linux-gnu- m68k-linux- m68k-unknown-linux-gnu-)
endif
endif
Enable processor type. Ordering of these is important - we want to
use the minimum processor type of the range we support. The logic
for 680x0 will only allow use of the -m68060 or -m68040 if no other
680x0 type is specified - and no option is specified for 68030 or
68020. The other m68k/ColdFire types always specify some type of
compiler cpu type flag.
ifndef CONFIG_M68040 cpuflags-$(CONFIG_M68060) = -m68060 endif ifndef CONFIG_M68060 cpuflags-$(CONFIG_M68040) = -m68040 endif cpuflags-$(CONFIG_M68030) = cpuflags-$(CONFIG_M68020) = cpuflags-$(CONFIG_M68000) = -m68000 cpuflags-$(CONFIG_M5441x) = $(call cc-option,-mcpu=54455,-mcfv4e) cpuflags-$(CONFIG_M54xx) = $(call cc-option,-mcpu=5475,-m5200) cpuflags-$(CONFIG_M5407) = $(call cc-option,-mcpu=5407,-m5200) cpuflags-$(CONFIG_M532x) = $(call cc-option,-mcpu=532x,-m5307) cpuflags-$(CONFIG_M537x) = $(call cc-option,-mcpu=537x,-m5307) cpuflags-$(CONFIG_M5307) = $(call cc-option,-mcpu=5307,-m5200) cpuflags-$(CONFIG_M528x) = $(call cc-option,-mcpu=528x,-m5307) cpuflags-$(CONFIG_M5275) = $(call cc-option,-mcpu=5275,-m5307) cpuflags-$(CONFIG_M5272) = $(call cc-option,-mcpu=5272,-m5307) cpuflags-$(CONFIG_M5271) = $(call cc-option,-mcpu=5271,-m5307) cpuflags-$(CONFIG_M523x) = $(call cc-option,-mcpu=523x,-m5307) cpuflags-$(CONFIG_M525x) = $(call cc-option,-mcpu=5253,-m5200) cpuflags-$(CONFIG_M5249) = $(call cc-option,-mcpu=5249,-m5200) cpuflags-$(CONFIG_M520x) = $(call cc-option,-mcpu=5208,-m5200) cpuflags-$(CONFIG_M5206e) = $(call cc-option,-mcpu=5206e,-m5200) cpuflags-$(CONFIG_M5206) = $(call cc-option,-mcpu=5206,-m5200)
Evaluate tune cc-option calls now
cpuflags-y := $(cpuflags-y)
KBUILD_AFLAGS += $(cpuflags-y) KBUILD_CFLAGS += $(cpuflags-y)
KBUILD_CFLAGS += -pipe -ffreestanding
ifdef CONFIG_MMU KBUILD_CFLAGS += -ffixed-a2 else
we can use a m68k-linux-gcc toolchain with these in place
KBUILD_CPPFLAGS += -DUTS_SYSNAME="uClinux" KBUILD_CPPFLAGS += -D__uClinux__ endif
KBUILD_LDFLAGS := -m m68kelf
ifdef CONFIG_SUN3 LDFLAGS_vmlinux = -N endif
CHECKFLAGS += -D__mc68000__
ifdef CONFIG_KGDB
If configured for kgdb support, include debugging infos and keep the
frame pointer
KBUILD_CFLAGS := $(subst -fomit-frame-pointer,,$(KBUILD_CFLAGS)) -g endif
libs-y += arch/m68k/lib/
all: zImage
lilo: vmlinux if [ -f $(INSTALL_PATH)/vmlinux ]; then mv -f $(INSTALL_PATH)/vmlinux $(INSTALL_PATH)/vmlinux.old; fi if [ -f $(INSTALL_PATH)/System.map ]; then mv -f $(INSTALL_PATH)/System.map $(INSTALL_PATH)/System.old; fi cat vmlinux > $(INSTALL_PATH)/vmlinux cp System.map $(INSTALL_PATH)/System.map if [ -x /sbin/lilo ]; then /sbin/lilo; else /etc/lilo/install; fi
zImage compressed: vmlinux.gz
vmlinux.gz: vmlinux
ifndef CONFIG_KGDB cp vmlinux vmlinux.tmp $(STRIP) vmlinux.tmp $(KGZIP) -9c vmlinux.tmp >vmlinux.gz rm vmlinux.tmp else $(KGZIP) -9c vmlinux >vmlinux.gz endif
bzImage: vmlinux.bz2
vmlinux.bz2: vmlinux
ifndef CONFIG_KGDB cp vmlinux vmlinux.tmp $(STRIP) vmlinux.tmp $(KBZIP2) -1c vmlinux.tmp >vmlinux.bz2 rm vmlinux.tmp else $(KBZIP2) -1c vmlinux >vmlinux.bz2 endif
CLEAN_FILES += vmlinux.gz vmlinux.bz2
archheaders: $(Q)$(MAKE) $(build)=arch/m68k/kernel/syscalls all
install: KBUILD_IMAGE := vmlinux.gz install: $(call cmd,install)