linux-kernel - [PATCHv1 006/211] unicore32: new file arch/unicore32/boot/compressed/Makefile

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Date:	Thu, 9 Dec 2010 17:35:44 +0800
From:	"Guan Xuetao" <guanxuetao@...c.pku.edu.cn>
To:	"Arnd Bergmann" <arnd@...db.de>
Cc:	<linux-arch@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCHv1 006/211] unicore32: new file arch/unicore32/boot/compressed/Makefile

From: Guan Xuetao <guanxuetao@...c.pku.edu.cn>

	Makefile for uncompressed head, with autogenerate piggy.S and
ld-script

Signed-off-by: Guan Xuetao <guanxuetao@...c.pku.edu.cn>
---
 arch/unicore32/boot/compressed/Makefile |   71
+++++++++++++++++++++++++++++++
 1 files changed, 71 insertions(+), 0 deletions(-)

diff --git a/arch/unicore32/boot/compressed/Makefile
b/arch/unicore32/boot/compressed/Makefile
new file mode 100644
index 0000000..79f8889
--- /dev/null
+++ b/arch/unicore32/boot/compressed/Makefile
@@ -0,0 +1,71 @@
+#
+# linux/arch/unicore32/boot/compressed/Makefile
+#
+# create a compressed vmlinuz image from the original vmlinux
+#
+# This file is subject to the terms and conditions of the GNU General
Public
+# License.  See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 2001~2010 GUAN Xue-tao
+#
+
+EXTRA_CFLAGS	:= -fpic -fno-builtin
+EXTRA_AFLAGS	:= -Wa,-march=all
+
+AFLAGS_head.o	+= -DTEXT_OFFSET=$(TEXT_OFFSET)
+OBJS		:= misc.o
+
+# font.c and font.o
+CFLAGS_font.o	:= -Dstatic=
+$(obj)/font.c: $(srctree)/drivers/video/console/font_8x8.c
+	$(call cmd,shipped)
+
+# piggy.S and piggy.o
+suffix_$(CONFIG_KERNEL_GZIP)	:= gzip
+suffix_$(CONFIG_KERNEL_BZIP2)	:= bz2
+suffix_$(CONFIG_KERNEL_LZO)	:= lzo
+suffix_$(CONFIG_KERNEL_LZMA)	:= lzma
+
+$(obj)/piggy.$(suffix_y): $(obj)/../Image FORCE
+	$(call if_changed,$(suffix_y))
+
+SEDFLAGS_piggy	= s/DECOMP_SUFFIX/$(suffix_y)/
+$(obj)/piggy.S: $(obj)/piggy.S.in
+	@sed "$(SEDFLAGS_piggy)" < $< > $@
+
+$(obj)/piggy.o:  $(obj)/piggy.$(suffix_y) $(obj)/piggy.S FORCE
+
+targets		:= vmlinux vmlinux.lds font.o font.c head.o misc.o \
+			piggy.$(suffix_y) piggy.o piggy.S \
+
+# Make sure files are removed during clean
+extra-y		+= piggy.gzip piggy.bz2 piggy.lzo piggy.lzma
+
+# Supply zreladdr to the decompressor via a linker symbol.
+LDFLAGS_vmlinux := --defsym zreladdr=$(TEXT_OFFSET)
+# ?
+LDFLAGS_vmlinux += -p
+# Report unresolved symbol references
+LDFLAGS_vmlinux += --no-undefined
+# Delete all temporary local symbols
+LDFLAGS_vmlinux += -X
+# Next argument is a linker script
+LDFLAGS_vmlinux += -T
+
+# For uidivmod
+$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/head.o $(obj)/piggy.o \
+		$(obj)/misc.o FORCE
+	$(call if_changed,ld)
+	@:
+
+# We now have a PIC decompressor implementation.  Decompressors running
+# from RAM should not define ZTEXTADDR.  Decompressors running directly
+# from ROM or Flash must define ZTEXTADDR (preferably via the config)
+ZTEXTADDR	:= 0
+ZBSSADDR	:= ALIGN(4)
+
+SEDFLAGS_lds	= s/TEXT_START/$(ZTEXTADDR)/;s/BSS_START/$(ZBSSADDR)/
+$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.in arch/unicore32/boot/Makefile
$(KCONFIG_CONFIG)
+	@sed "$(SEDFLAGS_lds)" < $< > $@
+


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