From 48115d14743e4134fcdd0b8766fc59c917ae1e79 Mon Sep 17 00:00:00 2001
From: Jan Beulich <jbeulich@novell.com>
Date: Wed, 9 Mar 2011 16:20:13 +0000
Subject: Move more kernel decompression bits to .init.* sections

Based on how c/s 22986:076b63b74cf6 changed xen/libelf/Makefile I
suppose this is compatibile with those clang/llvm changes, but I
didn't actually test it.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
---
 xen/Rules.mk | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'xen/Rules.mk')

diff --git a/xen/Rules.mk b/xen/Rules.mk
index c39706a6c7..7ab809ac9e 100644
--- a/xen/Rules.mk
+++ b/xen/Rules.mk
@@ -152,6 +152,18 @@ _clean_%/: FORCE
 %.o: %.S Makefile
 	$(CC) $(AFLAGS) -c $< -o $@
 
+SPECIAL_DATA_SECTIONS := rodata $(foreach n,1 2 4 8,rodata.str1.$(n)) \
+			 $(foreach r,rel rel.ro,data.$(r) data.$(r).local)
+
+%.init.o: %.o Makefile
+	$(OBJDUMP) -h $< | sed -n '/[0-9]/{s,00*,0,g;p}' | while read idx name sz rest; do \
+		case "$$name" in \
+		.text|.data|.bss) test $$sz = 0 || \
+			{ echo "Error: size of $<:$$name is 0x$$sz" >&2; exit $$idx; };; \
+		esac; \
+	done
+	$(OBJCOPY) $(foreach s,$(SPECIAL_DATA_SECTIONS),--rename-section .$(s)=.init.$(s)) $< $@
+
 %.i: %.c Makefile
 	$(CPP) $(CFLAGS) $< -o $@
 
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