Messages in this thread | | | Date | Wed, 01 Feb 2012 13:09:05 -0500 (EST) | Subject | Re: Memory corruption due to word sharing | From | David Miller <> |
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From: Michael Matz <matz@suse.de> Date: Wed, 1 Feb 2012 18:41:05 +0100 (CET)
> One problem is that it's not a new problem, GCC emitted similar code since > about forever, and still they turned up only now (well, probably because > ia64 is dead, but sparc64 should have similar problems).
Indeed, on sparc64 it does do the silly 64-bit access too:
wrong: ldx [%o0+8], %g2 sethi %hi(2147483648), %g1 or %g2, %g1, %g1 jmp %o7+8 stx %g1, [%o0+8]
Personally I've avoided C bitfields like the plague in any code I've written.
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