Re: [RFC PATCH for 5.2 10/10] rseq/selftests: mips: use break instruction for RSEQ_SIG

Hi Mathieu,

On Wed, Apr 24, 2019 at 07:12:03PM -0400, Mathieu Desnoyers wrote:

Does the following comment above the forest of #ifdef work for you ?

/*
 * RSEQ_SIG uses the break instruction. The instruction pattern is:
 *
 * On MIPS:
 *      0350000d        break     0x350
 *
 * On nanoMIPS32:
 *      00100350        break     0x350
 *
 * On microMIPS:
 *      0000d407        break     0x350
 *
 * For nanoMIPS32 and microMIPS, the instruction stream is encoded as 16-bit
 * halfwords, so the signature halfwords need to be swapped accordingly for
 * little-endian.
 */

I'd probably just say nanoMIPS rather than nanoMIPS32, because when we
get nanoMIPS64 in the future it'll be a superset of nanoMIPS32 & the
break encoding will be the same.

But otherwise it looks good to me :)

Thanks,
    Paul