mirror of
https://gitee.com/bianbu-linux/linux-6.6
synced 2025-07-24 01:54:03 -04:00
183ab05ff2
Instead of generating uncompressed kernel image starting at 0, filling first mb with zeros (with ".org 0x100000") and then trimming it off from vmlinux.bin before compression, simply generate a kernel image starting from 0x100000. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
73 lines
2.3 KiB
Makefile
73 lines
2.3 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# linux/arch/s390/boot/compressed/Makefile
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#
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# create a compressed vmlinux image from the original vmlinux
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#
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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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obj-y := $(if $(CONFIG_KERNEL_UNCOMPRESSED),,head.o misc.o) piggy.o
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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.scr.lds $(obj-y) $(if $(CONFIG_KERNEL_UNCOMPRESSED),,sizes.h)
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KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
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KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
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OBJECTS := $(addprefix $(obj)/,$(obj-y))
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LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup -T
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$(obj)/vmlinux: $(obj)/vmlinux.lds $(objtree)/arch/s390/boot/startup.a $(OBJECTS)
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$(call if_changed,ld)
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# extract required uncompressed vmlinux symbols and adjust them to reflect offsets inside vmlinux.bin
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sed-sizes := -e 's/^\([0-9a-fA-F]*\) . \(__bss_start\|_end\)$$/\#define SZ\2 (0x\1 - 0x100000)/p'
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quiet_cmd_sizes = GEN $@
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cmd_sizes = $(NM) $< | sed -n $(sed-sizes) > $@
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$(obj)/sizes.h: vmlinux
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$(call if_changed,sizes)
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AFLAGS_head.o += -I$(objtree)/$(obj)
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$(obj)/head.o: $(obj)/sizes.h
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CFLAGS_misc.o += -I$(objtree)/$(obj)
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$(obj)/misc.o: $(obj)/sizes.h
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OBJCOPYFLAGS_vmlinux.bin := -R .comment -S
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$(obj)/vmlinux.bin: vmlinux
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$(call if_changed,objcopy)
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vmlinux.bin.all-y := $(obj)/vmlinux.bin
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suffix-$(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-$(CONFIG_KERNEL_XZ) := .xz
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$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y)
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$(call if_changed,gzip)
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$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y)
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$(call if_changed,bzip2)
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$(obj)/vmlinux.bin.lz4: $(vmlinux.bin.all-y)
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$(call if_changed,lz4)
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$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y)
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$(call if_changed,lzma)
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$(obj)/vmlinux.bin.lzo: $(vmlinux.bin.all-y)
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$(call if_changed,lzo)
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$(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y)
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$(call if_changed,xzkern)
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LDFLAGS_piggy.o := -r --format binary --oformat $(LD_BFD) -T
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$(obj)/piggy.o: $(obj)/vmlinux.scr.lds $(obj)/vmlinux.bin$(suffix-y)
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$(call if_changed,ld)
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chkbss := $(filter-out $(obj)/misc.o $(obj)/piggy.o,$(OBJECTS))
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chkbss-target := $(obj)/vmlinux.bin
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include $(srctree)/arch/s390/scripts/Makefile.chkbss
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