mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-08-09 06:14:34 +02:00
Heiko CarstensandAlexander Gordeev
90d7412cd1
Convert memset(16|32|64)() from assembler to C, which should make it easier to read and change, if required. And it allows the compiler to optimize the code, and use different instructions, except for the used inline assemblies. Reviewed-by: Juergen Christ <jchrist@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
137 lines
5.1 KiB
Makefile
137 lines
5.1 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for the linux s390-specific parts of the memory manager.
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#
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# Tooling runtimes are unavailable and cannot be linked for early boot code
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KCOV_INSTRUMENT := n
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GCOV_PROFILE := n
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UBSAN_SANITIZE := n
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KASAN_SANITIZE := n
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KCSAN_SANITIZE := n
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KMSAN_SANITIZE := n
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#
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# Use minimum architecture level so it is possible to print an error
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# message if the kernel is started on a machine which is too old
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#
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CC_FLAGS_MARCH_MINIMUM := -march=z10
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KBUILD_AFLAGS := $(filter-out $(CC_FLAGS_MARCH),$(KBUILD_AFLAGS_DECOMPRESSOR))
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KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_MARCH),$(KBUILD_CFLAGS_DECOMPRESSOR))
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KBUILD_AFLAGS += $(CC_FLAGS_MARCH_MINIMUM) -D__DISABLE_EXPORTS
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KBUILD_CFLAGS += $(CC_FLAGS_MARCH_MINIMUM) -D__DISABLE_EXPORTS
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KBUILD_CFLAGS += $(call cc-option, -Wno-default-const-init-unsafe)
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CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
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# string.o implements standard library functions like memset/memcpy etc.
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# Use -ffreestanding to ensure that the compiler does not try to "optimize"
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# them into calls to themselves.
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CFLAGS_string.o = -ffreestanding
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obj-y := head.o als.o startup.o physmem_info.o ipl_parm.o ipl_report.o vmem.o
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obj-y += string.o ebcdic.o sclp_early_core.o ipl_vmparm.o cmdline.o
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obj-y += version.o pgm_check.o ctype.o ipl_data.o relocs.o alternative.o
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obj-y += uv.o printk.o trampoline.o
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obj-$(CONFIG_RANDOMIZE_BASE) += kaslr.o
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obj-y += $(if $(CONFIG_KERNEL_UNCOMPRESSED),,decompressor.o) info.o
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obj-$(CONFIG_KERNEL_ZSTD) += clz_ctz.o
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obj-$(CONFIG_KMSAN) += kmsan.o
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obj-$(CONFIG_STACKPROTECTOR) += stackprotector.o
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obj-all := $(obj-y) piggy.o syms.o
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targets := bzImage section_cmp.boot.data section_cmp.boot.preserved.data $(obj-y)
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targets += vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2
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targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
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targets += vmlinux.bin.zst info.bin syms.bin vmlinux.syms $(obj-all)
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targets += relocs.S
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OBJECTS := $(addprefix $(obj)/,$(obj-y))
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OBJECTS_ALL := $(addprefix $(obj)/,$(obj-all))
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clean-files += vmlinux.map
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quiet_cmd_section_cmp = SECTCMP $*
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define cmd_section_cmp
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s1=`$(OBJDUMP) -t "$<" | grep "\s$*\s\+" | sort | \
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sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \
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s2=`$(OBJDUMP) -t "$(word 2,$^)" | grep "\s$*\s\+" | sort | \
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sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \
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if [ "$$s1" != "$$s2" ]; then \
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echo "error: section $* differs between $< and $(word 2,$^)" >&2; \
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exit 1; \
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fi; \
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touch $@
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endef
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$(obj)/bzImage: $(obj)/vmlinux $(obj)/section_cmp.boot.data $(obj)/section_cmp.boot.preserved.data FORCE
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$(call if_changed,objcopy)
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$(obj)/section_cmp%: vmlinux $(obj)/vmlinux FORCE
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$(call if_changed,section_cmp)
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LDFLAGS_vmlinux-$(CONFIG_LD_ORPHAN_WARN) := --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)
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LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) --oformat $(LD_BFD) -e startup $(if $(CONFIG_VMLINUX_MAP),-Map=$(obj)/vmlinux.map) --build-id=sha1 -T
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$(obj)/vmlinux: $(obj)/vmlinux.lds $(OBJECTS_ALL) FORCE
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$(call if_changed,ld)
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LDFLAGS_vmlinux.syms := $(LDFLAGS_vmlinux-y) --oformat $(LD_BFD) -e startup -T
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$(obj)/vmlinux.syms: $(obj)/vmlinux.lds $(OBJECTS) FORCE
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$(call if_changed,ld)
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quiet_cmd_dumpsyms = DUMPSYMS $<
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define cmd_dumpsyms
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$(NM) -n -S --format=bsd "$<" | sed -nE 's/^0*([0-9a-fA-F]+) 0*([0-9a-fA-F]+) [tT] ([^ ]*)$$/\1 \2 \3/p' | tr '\n' '\0' > "$@"
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endef
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$(obj)/syms.bin: $(obj)/vmlinux.syms FORCE
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$(call if_changed,dumpsyms)
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OBJCOPYFLAGS_syms.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.decompressor.syms
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$(obj)/syms.o: $(obj)/syms.bin FORCE
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$(call if_changed,objcopy)
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OBJCOPYFLAGS_info.bin := -O binary --only-section=.vmlinux.info --set-section-flags .vmlinux.info=alloc,load
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$(obj)/info.bin: vmlinux FORCE
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$(call if_changed,objcopy)
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OBJCOPYFLAGS_info.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.info
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$(obj)/info.o: $(obj)/info.bin FORCE
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$(call if_changed,objcopy)
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OBJCOPYFLAGS_vmlinux.bin := -O binary --remove-section=.comment --remove-section=.vmlinux.info -S
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$(obj)/vmlinux.bin: vmlinux FORCE
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$(call if_changed,objcopy)
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# relocs.S is created by the vmlinux postlink step.
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$(obj)/relocs.S: vmlinux
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@true
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suffix-$(CONFIG_KERNEL_GZIP) := .gz
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suffix-$(CONFIG_KERNEL_BZIP2) := .bz2
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suffix-$(CONFIG_KERNEL_LZ4) := .lz4
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suffix-$(CONFIG_KERNEL_LZMA) := .lzma
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suffix-$(CONFIG_KERNEL_LZO) := .lzo
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suffix-$(CONFIG_KERNEL_XZ) := .xz
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suffix-$(CONFIG_KERNEL_ZSTD) := .zst
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$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
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$(call if_changed,gzip)
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$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
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$(call if_changed,bzip2_with_size)
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$(obj)/vmlinux.bin.lz4: $(obj)/vmlinux.bin FORCE
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$(call if_changed,lz4_with_size)
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$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
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$(call if_changed,lzma_with_size)
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$(obj)/vmlinux.bin.lzo: $(obj)/vmlinux.bin FORCE
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$(call if_changed,lzo_with_size)
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$(obj)/vmlinux.bin.xz: $(obj)/vmlinux.bin FORCE
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$(call if_changed,xzkern_with_size)
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$(obj)/vmlinux.bin.zst: $(obj)/vmlinux.bin FORCE
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$(call if_changed,zstd22_with_size)
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OBJCOPYFLAGS_piggy.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.bin.compressed
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$(obj)/piggy.o: $(obj)/vmlinux.bin$(suffix-y) FORCE
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$(call if_changed,objcopy)
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