Created attachment 55150 [details] output of run using -v -v -d -d Version: 3.6.0 OS: Linux Trying to run valgrind (memcheck) on an otherwise working program. Note that the program makes use of National Instruments (Labview) libraries that seem to do non-standard things (and are built/run against the previous generation C++ stdlib, from GCC 3.3.4). Reproducible: Always Steps to Reproduce: Just run valgrind on the target executable. Actual Results: SIGILL (apparently erroneously) sent to target program. Note that target program uses the compatibility standard C++ library from GCC 3.3.4. See attached debug (-v -v -d -d) output for more info.
(In reply to comment #0) > Note that > the program makes use of National Instruments (Labview) libraries Said unimplemented instruction does indeed appear to be originating from inside the National Instruments DAQmx Base libraries. Considering that the offending instruction is related to BCD data conversion, this would make sense-- the libraries are used to interface with data acquisition hardware that is undoubtedly using BCD encoding to simplify interaction with display components. Although I suspect the complexity of the task exceeds my capabilities, I'd be glad to take a stab at implementing the FBLD instruction for x86 if someone could give me a few pointers on where to start (e.g., I see where I think the front-end parsing is done in IRExpr_Binop, but I'm clueless about where in the virtual machine I'd need to do the actual implementation).
Wiring up the implementation isn't that difficult. The two key things you need here are: * a C implementation (function) that does the core functionality. Possibly of type double do_FBLD ( unsigned char* ) * enough of a test framework around it to demonstrate convincingly that the C function does the same conversion as FBLD, including whatever nasty corner cases there are (I have no idea)
Adding cross-reference to message posted at National Instruments website : http://forums.ni.com/t5/Multifunction-DAQ/Does-anyone-try-to-use-valgrind-with-software-linked-against/td-p/1400674