mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-09-01 06:39:05 +00:00
996f7f292b
Introduce a global function that jumps from the decompressor to the decompressed kernel. Put its address into svc_old_psw, from where GDB can take it without loading decompressor symbols. It should be available throughout the entire decompressor execution, because it's placed there statically, and nothing in the decompressor uses the SVC instruction. Acked-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Tested-by: Alexander Gordeev <agordeev@linux.ibm.com> Link: https://lore.kernel.org/r/20250625154220.75300-2-iii@linux.ibm.com Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
130 lines
4.8 KiB
Makefile
130 lines
4.8 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 += $(CC_FLAGS_MARCH_MINIMUM) -D__DISABLE_EXPORTS
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CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
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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 mem.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-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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