On Thu, 2014-11-27 at 09:38 +1100, Michael Ellerman wrote: > On Thu, 2014-11-27 at 08:11 +1100, Anton Blanchard wrote: > > I used some 64 bit instructions when adding the 32 bit getcpu VDSO > > function. Fix it. > > Ouch. The symptom is a SIGILL I presume?
Nope, you don't get a SIGILL when executing 64-bit instructions in 32-bit mode, so it'll happily just execute the instruction, doing a full 64-bit compare. I'm guessing that the upper 32-bits of both r3 and r4 contain zeros, so we're probably just getting lucky. > Could we catch this by forcing -m32 in the CFLAGS for vdso32 ? As Segher mentioned, GCC passing -many down to the assembler means -m32 won't help. It was due to Anton disabling that gcc "feature", that this was caught. Peter _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
