Date: Sun, 24 Nov 2019 19:02:13 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r355060 - head/sys/amd64/include Message-ID: <201911241902.xAOJ2D8G085494@repo.freebsd.org>
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Author: kib Date: Sun Nov 24 19:02:13 2019 New Revision: 355060 URL: https://svnweb.freebsd.org/changeset/base/355060 Log: amd64: assert that EARLY_COUNTER does not corrupt memory. Reviewed by: imp Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D22514 Modified: head/sys/amd64/include/counter.h Modified: head/sys/amd64/include/counter.h ============================================================================== --- head/sys/amd64/include/counter.h Sun Nov 24 16:40:54 2019 (r355059) +++ head/sys/amd64/include/counter.h Sun Nov 24 19:02:13 2019 (r355060) @@ -82,6 +82,7 @@ static inline void counter_u64_add(counter_u64_t c, int64_t inc) { + KASSERT(IS_BSP() || c != EARLY_COUNTER, ("EARLY_COUNTER used on AP")); __asm __volatile("addq\t%1,%%gs:(%0)" : : "r" ((char *)c - (char *)&__pcpu[0]), "ri" (inc)
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