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>
2.2 KiB
ia64/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) 1998-2004 by David Mosberger-Tang davidm@hpl.hp.com
KBUILD_DEFCONFIG := generic_defconfig
NM := $(CROSS_COMPILE)nm -B
CHECKFLAGS += -D__ia64=1 -D__ia64__=1 -D_LP64 -D__LP64__
OBJCOPYFLAGS := --strip-all LDFLAGS_vmlinux := -static KBUILD_AFLAGS_KERNEL := -mconstant-gp EXTRA :=
cflags-y := -pipe $(EXTRA) -ffixed-r13 -mfixed-range=f12-f15,f32-f127
-falign-functions=32 -frename-registers -fno-optimize-sibling-calls
KBUILD_CFLAGS_KERNEL := -mconstant-gp
GAS_STATUS = $(shell $(srctree)/arch/ia64/scripts/check-gas "$(CC)" "$(OBJDUMP)") KBUILD_CPPFLAGS += $(shell $(srctree)/arch/ia64/scripts/toolchain-flags "$(CC)" "$(OBJDUMP)" "$(READELF)")
ifeq ($(GAS_STATUS),buggy)
$(error Sorry, you need a newer version of the assember, one that is built from
a source-tree that post-dates 18-Dec-2002. You can find a pre-compiled
static binary of such an assembler at:
ftp://ftp.hpl.hp.com/pub/linux-ia64/gas-030124.tar.gz)
endif
quiet_cmd_gzip = GZIP $@ cmd_gzip = cat $(real-prereqs) | $(KGZIP) -n -f -9 > $@
quiet_cmd_objcopy = OBJCOPY $@ cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS) $(OBJCOPYFLAGS_$(@F)) $< $@
KBUILD_CFLAGS += $(cflags-y)
libs-y += arch/ia64/lib/
drivers-y += arch/ia64/pci/ arch/ia64/hp/common/
PHONY += compressed check
all: compressed unwcheck
compressed: vmlinux.gz
vmlinuz: vmlinux.gz
vmlinux.gz: vmlinux.bin FORCE $(call if_changed,gzip)
vmlinux.bin: vmlinux FORCE $(call if_changed,objcopy)
unwcheck: vmlinux -$(Q)READELF=$(READELF) $(PYTHON3) $(srctree)/arch/ia64/scripts/unwcheck.py $<
archheaders: $(Q)$(MAKE) $(build)=arch/ia64/kernel/syscalls all
CLEAN_FILES += vmlinux.gz
install: KBUILD_IMAGE := vmlinux.gz install: $(call cmd,install)
define archhelp echo '* compressed - Build compressed kernel image' echo ' install - Install compressed kernel image' echo '* unwcheck - Check vmlinux for invalid unwind info' endef