On Fri, 2015-03-13 at 00:10 -0700, Ram Pai wrote: > On Fri, Mar 13, 2015 at 03:39:24PM +1100, Michael Ellerman wrote: > > This adds a test of the switch_endian() syscall we added in the previous > > commit. > > > > We test it by calling the endian switch syscall, and then executing some > > code in the other endian to check everything went as expected. That code > > checks registers we expect to be maintained are, and then writes to > > stdout and then does exit(0). > > > > If the endian switch failed to happen that code sequence will be illegal > > and cause the test to abort. > > > > Signed-off-by: Michael Ellerman <m...@ellerman.id.au> > > --- > ..snip.. > > + .long 0x04000038 > > + # li r3,1 > > + .long 0x01006038 > > + # mr r4,r14 > > + .long 0x7873c47d > > + # li r5,21 > > + .long 0x1500a038 > > + # sc > > + .long 0x02000044 > > + # li r3,0 > > + .long 0x00006038 > > + # 1: > > + # li r0, __NR_exit > > Would it make sense to toggle the endianness here, > checking for the same register sanity before exiting? > > That way endian switching is tested both ways?
Yeah that is a good idea. /me keeps working on this "trivial" patch ;) cheers _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
