mirror of
https://github.com/torvalds/linux.git
synced 2024-11-21 19:46:16 +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>
79 lines
1.5 KiB
Makefile
79 lines
1.5 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0-only
|
|
OBJCOPYFLAGS :=-O binary
|
|
GZFLAGS :=-9
|
|
|
|
ifdef CONFIG_CPU_HAS_FPU
|
|
FPUEXT = f
|
|
endif
|
|
|
|
ifdef CONFIG_CPU_HAS_VDSP
|
|
VDSPEXT = v
|
|
endif
|
|
|
|
ifdef CONFIG_CPU_HAS_TEE
|
|
TEEEXT = t
|
|
endif
|
|
|
|
ifdef CONFIG_CPU_CK610
|
|
CPUTYPE = ck610
|
|
CSKYABI = abiv1
|
|
endif
|
|
|
|
ifdef CONFIG_CPU_CK810
|
|
CPUTYPE = ck810
|
|
CSKYABI = abiv2
|
|
endif
|
|
|
|
ifdef CONFIG_CPU_CK807
|
|
CPUTYPE = ck807
|
|
CSKYABI = abiv2
|
|
endif
|
|
|
|
ifdef CONFIG_CPU_CK860
|
|
CPUTYPE = ck860
|
|
CSKYABI = abiv2
|
|
endif
|
|
|
|
ifneq ($(CSKYABI),)
|
|
MCPU_STR = $(CPUTYPE)$(FPUEXT)$(VDSPEXT)$(TEEEXT)
|
|
KBUILD_CFLAGS += -mcpu=$(CPUTYPE) -Wa,-mcpu=$(MCPU_STR)
|
|
KBUILD_CFLAGS += -DCSKYCPU_DEF_NAME=\"$(MCPU_STR)\"
|
|
KBUILD_CFLAGS += -msoft-float -mdiv
|
|
KBUILD_CFLAGS += -fno-tree-vectorize
|
|
endif
|
|
|
|
KBUILD_CFLAGS += -pipe
|
|
ifeq ($(CSKYABI),abiv2)
|
|
KBUILD_CFLAGS += -mno-stack-size
|
|
endif
|
|
|
|
ifdef CONFIG_FRAME_POINTER
|
|
KBUILD_CFLAGS += -mbacktrace
|
|
endif
|
|
|
|
abidirs := $(patsubst %,arch/csky/%/,$(CSKYABI))
|
|
KBUILD_CFLAGS += $(patsubst %,-I$(srctree)/%inc,$(abidirs))
|
|
|
|
KBUILD_CPPFLAGS += -mlittle-endian
|
|
LDFLAGS += -EL
|
|
|
|
KBUILD_AFLAGS += $(KBUILD_CFLAGS)
|
|
|
|
core-y += arch/csky/$(CSKYABI)/
|
|
|
|
libs-y += arch/csky/lib/ \
|
|
$(shell $(CC) $(KBUILD_CFLAGS) $(KCFLAGS) -print-libgcc-file-name)
|
|
|
|
boot := arch/csky/boot
|
|
|
|
all: zImage
|
|
|
|
zImage Image uImage: vmlinux
|
|
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
|
|
|
|
define archhelp
|
|
echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage)'
|
|
echo ' Image - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
|
|
echo ' uImage - U-Boot wrapped zImage'
|
|
endef
|