On 17/03/16 16:46, sergey.fedo...@linaro.org wrote: > First the translation block is invalidated, for which a simple write > to tb->pc is enough. This means that cpu-exec will not pick up anymore > the block, though it may still execute it through chained jumps. This > also replaces the NULLing out of the pointer in the CPUs' local cache.
Although, using 'tb->pc' to mark a TB as invalid is probably not such a good idea. There may be some cases when PC could become equal to -1. For example, ARMv6-M uses PC >= 0xFFFFFFF0 to perform exception return. So we'd better introduce a separate 'tb->valid' or 'tb->invalid' flag. Kind regards, Sergey
