[PATCH 0/3] vDSO reference parser updates and Go workaround

Andy Lutomirski
2014-06-12T18:47:52Z

Patches 1 and 2 update the vDSO reference parser.

Despite the late submission, this might be 3.16 material: it's just
documentation. If I'd been more on top of this, I would have done it
for 3.15. It's also probably worthwhile given that there is at least
one rather buggy vDSO parser in the wild.

Patch 3 makes "Hello world" as built by Go stop segfaulting. It's
a performance regression for Go programs: it causes them to stop
finding any symbols in the vDSO, but that's a lot better than
segfaulting. It has big-endian issues, though, and it's ugly,
and it should probably be disabled for x32.

Andy Lutomirski (3):
doc,vdso: Rename vdso_test.c to vdso_standalone_test_x86.c
doc,vdso: Make vDSO examples more portable
x86,vdso: Hack to keep 64-bit Go programs working

Documentation/vDSO/parse_vdso.c | 59 ++++++------
Documentation/vDSO/vdso_standalone_test_x86.c | 128 ++++++++++++++++++++++++++
Documentation/vDSO/vdso_test.c | 103 +++++----------------
arch/x86/vdso/Makefile | 2 +-
arch/x86/vdso/vdso-fakesections.c | 20 ++++
arch/x86/vdso/vdso2c.h | 21 ++++-
6 files changed, 219 insertions(+), 114 deletions(-)
create mode 100644 Documentation/vDSO/vdso_standalone_test_x86.c
create mode 100644 arch/x86/vdso/vdso-fakesections.c

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1.9.3