The key is the test TST_SEL_RET on line 682. It compares the RPL of the return CS selector (saved on the stack by the original CALL) against the current CPL. If RPL == CPL, the PLA returns 0x000 (continue) and LD_DESCRIPTOR finishes normally -- same-privilege return. If RPL CPL, the caller is returning to a less-privileged ring, so the PLA redirects to 0x686 (RETF_OUTER_LEV) -- the cross-privilege path that must also restore the caller's stack. If RPL
Сайт Роскомнадзора атаковали18:00
,这一点在heLLoword翻译官方下载中也有详细论述
描述:n 辆车在单行道开往 target。车不能超车,可追上前车并同速行驶。车队定义为并排或同速行驶的车组。返回到达目的地的车队数量。
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