mirror of
https://github.com/torvalds/linux.git
synced 2024-11-10 14:11:52 +00:00
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>
65 lines
2.0 KiB
Makefile
65 lines
2.0 KiB
Makefile
#
|
|
# alpha/Makefile
|
|
#
|
|
# 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 Linus Torvalds
|
|
#
|
|
|
|
NM := $(NM) -B
|
|
|
|
LDFLAGS_vmlinux := -static -N #-relax
|
|
CHECKFLAGS += -D__alpha__
|
|
cflags-y := -pipe -mno-fp-regs -ffixed-8
|
|
cflags-y += $(call cc-option, -fno-jump-tables)
|
|
|
|
cpuflags-$(CONFIG_ALPHA_EV4) := -mcpu=ev4
|
|
cpuflags-$(CONFIG_ALPHA_EV5) := -mcpu=ev5
|
|
cpuflags-$(CONFIG_ALPHA_EV56) := -mcpu=ev56
|
|
cpuflags-$(CONFIG_ALPHA_POLARIS) := -mcpu=pca56
|
|
cpuflags-$(CONFIG_ALPHA_SX164) := -mcpu=pca56
|
|
cpuflags-$(CONFIG_ALPHA_EV6) := -mcpu=ev6
|
|
cpuflags-$(CONFIG_ALPHA_EV67) := -mcpu=ev67
|
|
# If GENERIC, make sure to turn off any instruction set extensions that
|
|
# the host compiler might have on by default. Given that EV4 and EV5
|
|
# have the same instruction set, prefer EV5 because an EV5 schedule is
|
|
# more likely to keep an EV4 processor busy than vice-versa.
|
|
cpuflags-$(CONFIG_ALPHA_GENERIC) := -mcpu=ev5
|
|
|
|
cflags-y += $(cpuflags-y)
|
|
|
|
|
|
# For TSUNAMI, we must have the assembler not emulate our instructions.
|
|
# The same is true for IRONGATE, POLARIS, PYXIS.
|
|
# BWX is most important, but we don't really want any emulation ever.
|
|
KBUILD_CFLAGS += $(cflags-y) -Wa,-mev6
|
|
|
|
libs-y += arch/alpha/lib/
|
|
|
|
# export what is needed by arch/alpha/boot/Makefile
|
|
LIBS_Y := $(patsubst %/, %/lib.a, $(libs-y))
|
|
export LIBS_Y
|
|
|
|
boot := arch/alpha/boot
|
|
|
|
#Default target when executing make with no arguments
|
|
all boot: $(boot)/vmlinux.gz
|
|
|
|
$(boot)/vmlinux.gz: vmlinux
|
|
$(Q)$(MAKE) $(build)=$(boot) $@
|
|
|
|
bootimage bootpfile bootpzfile: vmlinux
|
|
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
|
|
|
|
archheaders:
|
|
$(Q)$(MAKE) $(build)=arch/alpha/kernel/syscalls all
|
|
|
|
define archhelp
|
|
echo '* boot - Compressed kernel image (arch/alpha/boot/vmlinux.gz)'
|
|
echo ' bootimage - SRM bootable image (arch/alpha/boot/bootimage)'
|
|
echo ' bootpfile - BOOTP bootable image (arch/alpha/boot/bootpfile)'
|
|
echo ' bootpzfile - compressed kernel BOOTP image (arch/alpha/boot/bootpzfile)'
|
|
endef
|