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authorAndi Kleen <ak@suse.de>2007-10-01 01:20:08 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-01 19:21:30 -0700
commitcf8dc57cbac0fe089308f57c333ab763c36782ff (patch)
treec084a6adb12bf63d74800466d89b34d5807d886f
parent75723957673bfa10c98b735259f891cc79cf0450 (diff)
x86_64: increase VDSO_TEXT_OFFSET for ancient binutils
For some reason old binutils genertate larger headers so increase the text offset of the vdso to avoid linker errors. Roland McGrath explains: "There are extra symbols in the '.dynsym' section that are responsible for the size difference (They also cause corresponding inflation in '.gnu.version') Older ld's wrongly generated these unneeded symbols in .dynsym. This was fixed not all that long ago (2006); binutils-2.17.50.0.6 might be the first fixed version, but I have not verified for sure where the cutoff was. The unneeded symbols et al from old ld add almost 700 bytes excess. This limits fairly tightly the amount by which the actual text and data in the vDSO can grow in the future without pushing the whole file over 4kb. If it does grow later on, we should consider changing the layout with a config option or something to pack it better without that padding, when building the kernel with newer binutils." Signed-off-by: Andi Kleen <ak@suse.de> Cc: Roland McGrath <roland@redhat.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/x86_64/vdso/voffset.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86_64/vdso/voffset.h b/arch/x86_64/vdso/voffset.h
index 5304204911f2..4af67c79085f 100644
--- a/arch/x86_64/vdso/voffset.h
+++ b/arch/x86_64/vdso/voffset.h
@@ -1 +1 @@
-#define VDSO_TEXT_OFFSET 0x500
+#define VDSO_TEXT_OFFSET 0x600