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This sounds like a toolchain issue.
[Goes away and googles]
http://gcc.gnu.org/onlinedocs/gcc/M680x0-Options.html
-malign-int -mno-align-int Control whether GCC aligns int, long, long long, float, double, and long double variables on a 32-bit boundary (-malign-int) or a 16-bit boundary (-mno-align-int). Aligning variables on 32-bit boundaries produces code that runs somewhat faster on processors with 32-bit busses at the expense of more memory.
Warning: if you use the -malign-int switch, GCC will align structures containing the above types differently than most published application binary interface specifications for the m68k.
Does this help?
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