On Wed, 2010-05-12 at 10:16 -0700, David Daney wrote: > On 05/12/2010 06:23 AM, Wu Zhangjin wrote: > > From: Wu Zhangjin<wuzhangjin@xxxxxxxxx> > > > > As the doc[1] of gcc-4.5 shows, the -mmcount-ra-address uses register > > $12 to transfer the stack offset of the return address to the _mcount > > function. in 64bit kernel, $12 is t0, but in 32bit kernel, it is t4, so, > > we need to use $12 instead of t0 here to cover the 64bit and 32bit > > support. > > > > [1] Gcc doc: MIPS Options > > http://gcc.gnu.org/onlinedocs/gcc/MIPS-Options.html > > > > Signed-off-by: Wu Zhangjin<wuzhangjin@xxxxxxxxx> > > Would it be better to do?: > > #define MCOUNT_RA_ADDRESS_REG $12 > > s/t0/MCOUNT_RA_ADDRESS_REG/g Good idea, will change it later. Regards, Wu Zhangjin
