> From: Hans-Peter Nilsson <h...@axis.com> > Date: Fri, 15 Jun 2012 04:07:23 +0200
A ping. > Y is 28 for introduction of the quoted code in > arch/arm/mm/alignment.c, AFAICT, so how about this one, ok now? > > Index: changes.html > =================================================================== > RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.7/changes.html,v > retrieving revision 1.113 > diff -p -u -r1.113 changes.html > --- changes.html 5 Jun 2012 11:03:53 -0000 1.113 > +++ changes.html 15 Jun 2012 02:04:46 -0000 > @@ -43,6 +43,19 @@ > > </li> > > + <li>On ARM, when compiling for ARMv6 (but not ARMv6-M), ARMv7-A, > + ARMv7-R, or ARMv7-M, the new option > + <code>-munaligned-access</code> is active by default, which for > + some source codes generates code that accesses memory on unaligned > + adresses. This will require the kernel of those systems to enable > + such accesses (controlled by CP15 register <code>c1</code>, refer > + to ARM documentation). Alternatively or for compatibility with > + kernels where unaligned accesses are not supported, all code has > + to be compiled with <code>-mno-unaligned-access</code>. > + Linux/ARM in official releases has automatically and > + unconditionally supported unaligned accesses as emitted by GCC due > + to this option being active since Linux version 2.6.28.</li> > + > <li>Support on ARM for the legacy floating-point accelerator (FPA) and > the mixed-endian floating-point format that it used has been obsoleted. > The ports that still use this format have been obsoleted as well. >
