Date: Thu, 8 Nov 2012 23:21:02 +0000 (UTC) From: Dimitry Andric <dim@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r242804 - head/sys/boot/i386/boot2 Message-ID: <201211082321.qA8NL2hT046367@svn.freebsd.org>
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Author: dim Date: Thu Nov 8 23:21:02 2012 New Revision: 242804 URL: http://svnweb.freebsd.org/changeset/base/242804 Log: Shrink boot2 by 8 bytes, by eliminating some unneeded instructions in sio.S. This is not particularly needed for head right now, but it is intended to merge to stable/9, to fix boot2 build with clang there. Reviewed by: avg MFC after: 3 days Modified: head/sys/boot/i386/boot2/sio.S Modified: head/sys/boot/i386/boot2/sio.S ============================================================================== --- head/sys/boot/i386/boot2/sio.S Thu Nov 8 23:11:59 2012 (r242803) +++ head/sys/boot/i386/boot2/sio.S Thu Nov 8 23:21:02 2012 (r242804) @@ -40,13 +40,11 @@ sio_init: pushl %eax movb $0x3,%al # Set RTS, outb %al,(%dx) # DTR incl %edx # Line status reg - call sio_flush - ret + # Fallthrough /* int sio_flush(void) */ -sio_flush: xorl %eax,%eax # Return value - xorl %ecx,%ecx # Timeout +sio_flush: xorl %ecx,%ecx # Timeout movb $0x80,%ch # counter sio_flush.1: call sio_ischar # Check for character jz sio_flush.2 # Till none
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