Date: Tue, 14 Aug 2018 19:21:31 +0000 (UTC) From: Mark Johnston <markj@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r337813 - head/sys/x86/x86 Message-ID: <201808141921.w7EJLVAa076057@repo.freebsd.org>
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Author: markj Date: Tue Aug 14 19:21:31 2018 New Revision: 337813 URL: https://svnweb.freebsd.org/changeset/base/337813 Log: Help ensure that the copy loop doesn't get converted to a memcpy() call. Reported and reviewed by: kib X-MFC with: r337715 Sponsored by: The FreeBSD Foundation Modified: head/sys/x86/x86/ucode.c Modified: head/sys/x86/x86/ucode.c ============================================================================== --- head/sys/x86/x86/ucode.c Tue Aug 14 19:12:45 2018 (r337812) +++ head/sys/x86/x86/ucode.c Tue Aug 14 19:21:31 2018 (r337813) @@ -346,7 +346,7 @@ ucode_load_bsp(uintptr_t free) addr = map_ucode(free, len); /* We can't use memcpy() before ifunc resolution. */ for (i = 0; i < len; i++) - addr[i] = match[i]; + addr[i] = ((volatile uint8_t *)match)[i]; match = addr; if (loader->load(match, false) == 0) {
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