From cf8dc57cbac0fe089308f57c333ab763c36782ff Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Mon, 1 Oct 2007 01:20:08 -0700 Subject: 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 Cc: Roland McGrath Cc: Badari Pulavarty Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86_64/vdso/voffset.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/x86_64/vdso/voffset.h') 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 -- cgit v1.2.3-59-g8ed1b