On Fri, 2013-10-18 at 14:40 -0500, Tom Musta wrote: > This patch modifies the endian chicken switch in the single step > emulation code (emulate_step()). The old (big endian) code bailed > early if a load or store instruction was to be emulated in little > endian mode. > > The new code modifies the check and only bails in a cross-endian > situation (LE mode in a kernel compiled for BE and vice verse).
I get a malformed patch error, looks like it got wrapped. Cheers, Ben. > Signed-off-by: Tom Musta <tmu...@gmail.com> > --- > arch/powerpc/lib/sstep.c | 12 +++++++++--- > 1 files changed, 9 insertions(+), 3 deletions(-) > > diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c > index b1faa15..5e0d0e9 100644 > --- a/arch/powerpc/lib/sstep.c > +++ b/arch/powerpc/lib/sstep.c > @@ -1222,12 +1222,18 @@ int __kprobes emulate_step(struct pt_regs *regs, > unsigned int instr) > } > > /* > - * Following cases are for loads and stores, so bail out > - * if we're in little-endian mode. > + * Following cases are for loads and stores and this > + * implementation does not support cross-endian. So > + * bail out if this is the case. > */ > +#ifdef __BIG_ENDIAN__ > if (regs->msr & MSR_LE) > return 0; > - > +#endif > +#ifdef __LITTLE_ENDIAN__ > + if (!regs->msr & MSR_LE) > + return 0; > +#endif > /* > * Save register RA in case it's an update form load or store > * and the access faults. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
