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Sun, 28 Sep 2025 00:47:13 GMT (envelope-from git) Date: Sun, 28 Sep 2025 00:47:13 GMT Message-Id: <202509280047.58S0lDIU048240@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Konstantin Belousov Subject: git: 0c3b3c7482db - stable/15 - amd64 cpufunc.h: add rcs(), to read code selector List-Id: Commits to the stable branches of the FreeBSD src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-branches List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-branches@freebsd.org Sender: owner-dev-commits-src-branches@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: kib X-Git-Repository: src X-Git-Refname: refs/heads/stable/15 X-Git-Reftype: branch X-Git-Commit: 0c3b3c7482dbdf854e96268d2afbda91928a648c Auto-Submitted: auto-generated The branch stable/15 has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=0c3b3c7482dbdf854e96268d2afbda91928a648c commit 0c3b3c7482dbdf854e96268d2afbda91928a648c Author: Konstantin Belousov AuthorDate: 2025-09-19 02:37:14 +0000 Commit: Konstantin Belousov CommitDate: 2025-09-28 00:43:50 +0000 amd64 cpufunc.h: add rcs(), to read code selector (cherry picked from commit 50ee990e1874d6d40b8e3dc359c37e2ef2ebf477) --- sys/amd64/include/cpufunc.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/sys/amd64/include/cpufunc.h b/sys/amd64/include/cpufunc.h index e6c9f47ea261..9a4c82275a99 100644 --- a/sys/amd64/include/cpufunc.h +++ b/sys/amd64/include/cpufunc.h @@ -572,6 +572,15 @@ rss(void) return (sel); } +static __inline u_short +rcs(void) +{ + u_short sel; + + __asm __volatile("movw %%cs,%0" : "=rm" (sel)); + return (sel); +} + static __inline void load_ds(u_short sel) {