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
David Ellison pitches Paramount’s $108 billion hostile bid for WBD as “pro consumer.”
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Фото: Алексей Филиппов / РИА Новости
Meta、OpenAI、苹果等公司均在以高额薪酬吸引顶尖研究者，过去一年 Meta AI 团队也出现多位核心成员离职，包括 Yann LeCun 等高管。