Re: [Valgrind-developers] [patch] ARM tests for exp-bbv tool

[Julian S. <js...@ac...>]

Vince,

> with the ARM work hitting the tree, I thought I'd see about getting some
> arm tests working for the exp-bbv tool.

Good, however ..

> The results files currently aren't correct; the only ARM machine I have
> access to is armv5 which doesn't seem to be supported currently.  I hacked
> the configure script to allow arm5* and modified dispatch-arm-linux.S to
> not touch FPSCR but that doesn't seem to be enough; valgrind builds just
> fine but any programs run through it instantly give illegal instruction
> errrors.

v7 is really the minimum supported target.  The JIT produces mostly
v5 instructions but some v6 (load 16-bit immediates into a lower/upper
register half), and a few v7 (ldrex{,b,w,d} and strex{,b,w,d}) to do
with atomic memory accesses, and it also assumes the presence of VFP.
So it's not surprising it SIGILLd on a v5 cpu.

J