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