[Vm-dev] Re: New Cog VMs available

[Holger Freyther]

> On 21 Jun 2015, at 03:33, Eliot Miranda <eliot.miranda at gmail.com> wrote:
> 
> Hi All,
> 
> 
> All is not perfect.  I've been able to update a Spur image completely and run almost all tests.  But currently there's a segfault coming from SSL.  Anyone who's got expertise with SSL and ARM is encouraged to take a look.  Here's the current stack trace for the segfault:
> 
> Program received signal SIGILL, Illegal instruction.
> 0xb5fd4600 in ?? () from /usr/lib/arm-linux-gnueabihf/libcrypto.so.1.0.0
> (gdb) where
> #0  0xb5fd4600 in ?? () from /usr/lib/arm-linux-gnueabihf/libcrypto.so.1.0.0
> #1  0xb5fd0fe4 in OPENSSL_cpuid_setup ()
>    from /usr/lib/arm-linux-gnueabihf/libcrypto.so.1.0.0


That is trying to detect available CPU instructions at runtime[1]. The idea is that
the code sets a signal handler for SIGILL, then executes ARMvX instruction
and if the signal handler is not called it can use these routines.

So the SIGILL is expected behavior, is this the last error or the first one?

holger


[1] https://git.openssl.org/?p=openssl.git;a=blob;f=crypto/armcap.c;h=1afbc9fcd036771dd694d0dbfa42df4d839d382b;hb=bc9567cdc9a56b5c904e075e3b929076c1e7583c#l89