'I do not trust them' - top streamers left concerned by Discord age checks
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
，这一点在快连下载-Letsvpn下载中也有详细论述
But we've learned a lot since then. JavaScript has evolved. A streaming API designed today can be simpler, more aligned with the language, and more explicit about the things that matter, like backpressure and multi-consumer behavior.
TST_SEL_RET (0x02) -- used by far RET to detect cross-privilege returns:
2026-02-26 15:00:00