Hello,
The code below helps to find if we are running on Xen VM and uses "ud2a"
http://xen-3.1.sourcearchive.com/documentation/3.1.0/xen-detect_8c-source.html
and as expected Valgrind 3.4.1 throws the following warning:
vex x86->IR: unhandled instruction bytes: 0xF 0xB 0x78 0x65
==31055== valgrind: Unrecognised instruction at address 0x80484a2.
==31055== Your program just tried to execute an instruction that Valgrind
==31055== did not recognise. There are two possible reasons for this.
==31055== 1. Your program has a bug and erroneously jumped to a non-code
==31055== location. If you are running Memcheck and you just saw a
==31055== warning about a bad jump, it's probably your program's fault.
==31055== 2. The instruction is legitimate but Valgrind doesn't handle it,
==31055== i.e. it's Valgrind's fault. If you think this is the case or
==31055== you are not sure, please let us know and we'll try to fix it.
==31055== Either way, Valgrind will now raise a SIGILL signal which will
==31055== probably kill your program.
==31055==
==31055== Process terminating with default action of signal 4 (SIGILL)
==31055== Illegal opcode at address 0x80484A2
==31055== at 0x80484A2: cpuid (b.c:43)
==31055== by 0x8048601: main (b.c:91)
Is there a way to suppress this warning.
Thanks,
Madhan.
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