[Xen-devel] [PATCH v6 01/15] x86: properly calculate ELF end of image address

[Daniel Kiper <daniel.kiper@xxxxxxxxxx>]

Currently ELF end of image address is calculated using first line from
"nm -nr xen/xen-syms" output. However, today usually it contains random
symbol address not related to end of image in any way. So, it looks
that for years that stuff have been working just by lucky coincidence.
Hence, it have to be changed to something more reliable. So, let's take
ELF end of image address by reading _end symbol address from nm output.

Signed-off-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
---
 xen/arch/x86/Makefile |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/Makefile b/xen/arch/x86/Makefile
index d3875c5..a4fe740 100644
--- a/xen/arch/x86/Makefile
+++ b/xen/arch/x86/Makefile
@@ -91,7 +91,7 @@ endif
 
 $(TARGET): $(TARGET)-syms $(efi-y) boot/mkelf32
        ./boot/mkelf32 $(notes_phdrs) $(TARGET)-syms $(TARGET) 0x100000 \
-       `$(NM) -nr $(TARGET)-syms | head -n 1 | sed -e 's/^\([^ ]*\).*/0x\1/'`
+               `$(NM) -nr $(TARGET)-syms | awk '$$3 == "_end" {print "0x"$$1}'`
 
 .PHONY: tests
 tests:
-- 
1.7.10.4


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