Date: Fri, 9 May 2014 01:30:15 +0000 (UTC) From: "Pedro F. Giffuni" <pfg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r265728 - stable/10/contrib/gcc/config/i386 Message-ID: <201405090130.s491UFl7032105@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: pfg Date: Fri May 9 01:30:15 2014 New Revision: 265728 URL: http://svnweb.freebsd.org/changeset/base/265728 Log: MFC r265231: gcc: fix strict alignment. From the OpenBSD log: x86-64 ABI requires arrays greater than 16 bytes to be aligned to 16byte boundary. However, GCC 16-byte aligns arrays of >=16 BITS, not BYTES. This diff improves bug detectability for code which has local arrays of [16 .. 127] bits: in those cases SSP will now detect even 1-byte overflows. Obtained from: OpenBSD (CVS rev 1.4) Modified: stable/10/contrib/gcc/config/i386/i386.c Modified: stable/10/contrib/gcc/config/i386/i386.c ============================================================================== --- stable/10/contrib/gcc/config/i386/i386.c Fri May 9 01:25:25 2014 (r265727) +++ stable/10/contrib/gcc/config/i386/i386.c Fri May 9 01:30:15 2014 (r265728) @@ -14408,7 +14408,7 @@ ix86_local_alignment (tree type, int ali if (AGGREGATE_TYPE_P (type) && TYPE_SIZE (type) && TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST - && (TREE_INT_CST_LOW (TYPE_SIZE (type)) >= 16 + && (TREE_INT_CST_LOW (TYPE_SIZE (type)) >= 128 || TREE_INT_CST_HIGH (TYPE_SIZE (type))) && align < 128) return 128; }
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201405090130.s491UFl7032105>