Ensure that the jump buffer is appropriately aligned. #86
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The stack capturing mechanism in
STACK_CONTEXT_BEGINputs theStackContextStructon the stack, where it will later be scanned usingTraceScanArea. ThejumpBuffermust be allocated on the stack at an address with suitable alignment so thatTraceScanAreawill correctly fix any addresses therein. On platform XCA6LL,jmp_bufis declared as an array ofint, which has 4-byte alignment, but we need it to have 8-byte alignment in order to correctly interpret the contents.This addresses fifteen of the seventeen MMQA test failures in issue #84.