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--- a/scripts/Makefile.lib
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+++ b/scripts/Makefile.lib
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@@ -166,4 +166,9 @@ cmd_objcopy = $(OBJCOPY) $(OBJCOPYFLAGS)
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quiet_cmd_gzip = GZIP $@
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cmd_gzip = gzip -f -9 < $< > $@
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-
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+# LZMA
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+#
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+quiet_cmd_lzma = LZMA $@
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+cmd_lzma = bash -e scripts/lzma_kern $< $@ -lc7 -lp0 -pb0
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+# to use lzmacomp,
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+# cmd_lzma = lzmacomp $< 700 > $@
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--- /dev/null
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+++ b/scripts/lzma_kern
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@@ -0,0 +1,4 @@
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+get-size() { echo "$5" ;}
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+printf -v len '%.8x' "$(get-size $(ls -l "$1"))"
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+lzma e "$@"
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+echo -ne "\x$(echo $len | cut -c 7,8)\x$(echo $len | cut -c 5,6)\x$(echo $len | cut -c 3,4)\x$(echo $len | cut -c 1,2)" >> "$2"
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--- a/arch/x86/boot/compressed/Makefile_32
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+++ b/arch/x86/boot/compressed/Makefile_32
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@@ -4,8 +4,8 @@
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# create a compressed vmlinux image from the original vmlinux
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#
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-targets := vmlinux vmlinux.bin vmlinux.bin.gz head_32.o misc_32.o piggy.o \
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- vmlinux.bin.all vmlinux.relocs
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+targets := vmlinux vmlinux.bin vmlinux.bin.lzma head_32.o piggy.o \
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+ vmlinux.bin.all vmlinux.relocs lzma_misc.o
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EXTRA_AFLAGS := -traditional
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LDFLAGS_vmlinux := -T
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@@ -17,7 +17,7 @@ KBUILD_CFLAGS := -m32 -D__KERNEL__ $(LI
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$(call cc-option,-fno-stack-protector)
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LDFLAGS := -m elf_i386
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-$(obj)/vmlinux: $(src)/vmlinux_32.lds $(obj)/head_32.o $(obj)/misc_32.o $(obj)/piggy.o FORCE
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+$(obj)/vmlinux: $(src)/vmlinux_32.lds $(obj)/head_32.o $(obj)/lzma_misc.o $(obj)/piggy.o FORCE
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$(call if_changed,ld)
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@:
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@@ -37,14 +37,14 @@ $(obj)/vmlinux.bin.all: $(vmlinux.bin.al
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$(call if_changed,relocbin)
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ifdef CONFIG_RELOCATABLE
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-$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin.all FORCE
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- $(call if_changed,gzip)
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+$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin.all FORCE
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+ $(call if_changed,lzma)
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else
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-$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
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- $(call if_changed,gzip)
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+$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
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+ $(call if_changed,lzma)
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endif
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LDFLAGS_piggy.o := -r --format binary --oformat elf32-i386 -T
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-$(obj)/piggy.o: $(src)/vmlinux_32.scr $(obj)/vmlinux.bin.gz FORCE
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+$(obj)/piggy.o: $(src)/vmlinux_32.scr $(obj)/vmlinux.bin.lzma FORCE
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$(call if_changed,ld)
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