Date: Thu, 15 May 2014 06:45:18 -0700 From: Nathan Whitehorn <nwhitehorn@freebsd.org> To: Justin Hibbits <jhibbits@freebsd.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r266116 - head/sys/powerpc/aim Message-ID: <5374C4EE.9040201@freebsd.org> In-Reply-To: <201405150418.s4F4I7q4048799@svn.freebsd.org> References: <201405150418.s4F4I7q4048799@svn.freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On 05/14/14 21:18, Justin Hibbits wrote: > Author: jhibbits > Date: Thu May 15 04:18:06 2014 > New Revision: 266116 > URL: http://svnweb.freebsd.org/changeset/base/266116 > > Log: > A page mask size is 12-bits, not 11. > > MFC after: 1 week > > Modified: > head/sys/powerpc/aim/trap_subr32.S > > Modified: head/sys/powerpc/aim/trap_subr32.S > ============================================================================== > --- head/sys/powerpc/aim/trap_subr32.S Thu May 15 03:47:52 2014 (r266115) > +++ head/sys/powerpc/aim/trap_subr32.S Thu May 15 04:18:06 2014 (r266116) > @@ -677,7 +677,7 @@ disitrap: > mtcr %r31 > bt 17,realtrap /* branch is user mode */ > mfsprg1 %r31 /* get old SP */ > - clrrwi %r31,%r31,11 /* Round SP down to nearest page */ > + clrrwi %r31,%r31,12 /* Round SP down to nearest page */ > sub. %r30,%r31,%r30 /* SP - DAR */ > bge 1f > neg %r30,%r30 /* modulo value */ > Is it? 4096 bytes is 2^12. The mask is 4096-1, which is 11 bits all 1. -Nathan
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?5374C4EE.9040201>