mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
bd79d66329
Move head64.S main kernel entry point "startup_continue" to 0x100000 and trim everything which is below 1M during build. So, that the decompressor would unpack the main kernel image, move it to 0x100000 and jump to startup_continue. 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>
78 lines
2.3 KiB
Makefile
78 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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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 += misc.o piggy.o sizes.h head.o
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KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
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KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
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OBJECTS := $(addprefix $(objtree)/arch/s390/kernel/, head.o ebcdic.o als.o)
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OBJECTS += $(objtree)/drivers/s390/char/sclp_early_core.o
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OBJECTS += $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o
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LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup -T
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$(obj)/vmlinux: $(obj)/vmlinux.lds $(OBJECTS)
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$(call if_changed,ld)
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TRIM_HEAD_SIZE := 0x100000
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sed-sizes := -e 's/^\([0-9a-fA-F]*\) . \(__bss_start\|_end\)$$/\#define SZ\2 (0x\1 - $(TRIM_HEAD_SIZE))/p'
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quiet_cmd_sizes = GEN $@
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cmd_sizes = $(NM) $< | sed -n $(sed-sizes) > $@
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quiet_cmd_trim_head = TRIM $@
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cmd_trim_head = tail -c +$$(($(TRIM_HEAD_SIZE) + 1)) $< > $@
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$(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: $(obj)/sizes.h
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OBJCOPYFLAGS_vmlinux.bin.full := -R .comment -S
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$(obj)/vmlinux.bin.full: vmlinux
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$(call if_changed,objcopy)
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$(obj)/vmlinux.bin: $(obj)/vmlinux.bin.full
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$(call if_changed,trim_head)
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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 $(obj)/vmlinux.bin.$(suffix-y)
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$(call if_changed,ld)
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