it gave IBM the foundations for networked systems that are almost modern in
FT Digital Edition: our digitised print edition。关于这个话题，旺商聊官方下载提供了深入分析
But this week, a US Commerce Department official told lawmakers that none of those chips have yet been sold to Chinese customers.，更多细节参见51吃瓜
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