x86/vdso: Hack to keep 64-bit Go programs working

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The Go runtime has a buggy vDSO parser that currently segfaults.
This writes an empty SHT_DYNSYM entry that causes Go's runtime to
malfunction by thinking that the vDSO is empty rather than
malfunctioning by running off the end and segfaulting.

This affects x86-64 only as far as we know, so we do not need this for
the i386 and x32 vdsos.

Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/d10618176c4bd39b457a5e85c497295c90cab1bc.1402620737.git.luto@amacapital.net
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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Andy Lutomirski 2014-06-12 17:53:12 -07:00 • committed by H. Peter Anvin

parent b4b31f6101

commit e0bf7b86da

3 changed files with 60 additions and 13 deletions

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18

arch/x86/vdso/Makefile

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32

arch/x86/vdso/vdso-fakesections.c

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23

arch/x86/vdso/vdso2c.h

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