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[Qemu-devel] [PATCH for-2.9 0/2] tcg/sparc: zero extend ld/st helper arg

From: Peter Maydell
Subject: [Qemu-devel] [PATCH for-2.9 0/2] tcg/sparc: zero extend ld/st helper args
Date: Mon, 27 Mar 2017 17:04:28 +0100

These patches fix problems with the SPARC TCG backend code
which calls the load and store helpers. Where the argument
being passed to the helper is narrower than the size of the
native register, the SPARC calling convention requires that
we extend it to the register size, but we weren't doing that.
This meant we passed the host code registers which might have
garbage in the high parts, and if the host code was built
with optimization this resulted in wrong behaviour.

I still see problems trying to run the bits of 'make check'
that run guest code, but at least with these patches we can
run the i386 bios code enough to try to do PXE boot and not
find a server.

Peter Maydell (2):
  tcg/sparc: Zero extend data argument to store helpers
  tcg/sparc: Zero extend address argument to ld/st helpers

 tcg/sparc/tcg-target.inc.c | 31 +++++++++++++++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)


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