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coctx_make 是否存在无效代码 #202

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@bokereyu

void **ret_addr = (void **)(sp);
*ret_addr = (void *)pfn;
这两句操作的是BP的内容,根本不是retrun adress ,所以在 swap的时候,这里操作的adress根本无效,还要 额外的记录一次返回地址。
不知这样理解是否正确,请指导

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