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--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -172,4 +172,9 @@
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)" >> "$2"
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -4,7 +4,7 @@
# create a compressed vmlinux image from the original vmlinux
#
-targets := vmlinux vmlinux.bin vmlinux.bin.gz head_$(BITS).o misc.o piggy.o
+targets := vmlinux vmlinux.bin vmlinux.bin.lzma head_$(BITS).o lzma_misc.o piggy.o
KBUILD_CFLAGS := -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2
KBUILD_CFLAGS += -fno-strict-aliasing -fPIC
@@ -18,7 +18,7 @@
LDFLAGS := -m elf_$(UTS_MACHINE)
LDFLAGS_vmlinux := -T
-$(obj)/vmlinux: $(src)/vmlinux_$(BITS).lds $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/piggy.o FORCE
+$(obj)/vmlinux: $(src)/vmlinux_$(BITS).lds $(obj)/head_$(BITS).o $(obj)/lzma_misc.o $(obj)/piggy.o FORCE
$(call if_changed,ld)
@:
@@ -44,11 +44,11 @@
$(call if_changed,relocbin)
ifdef CONFIG_RELOCATABLE
-$(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
+ $(call if_changed,lzma)
endif
LDFLAGS_piggy.o := -r --format binary --oformat elf32-i386 -T
@@ -60,5 +60,5 @@
endif
-$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
+$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.lzma FORCE
$(call if_changed,ld)
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