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Re: [PATCH 3/6] x86/MPX: suppress base/index swapping in Intel mode for bndmk, bndldx, and bndstx
- From: "H.J. Lu" <hjl dot tools at gmail dot com>
- To: Jan Beulich <JBeulich at suse dot com>
- Cc: kirill dot yukhin at intel dot com, Binutils <binutils at sourceware dot org>
- Date: Tue, 8 Oct 2013 08:16:30 -0700
- Subject: Re: [PATCH 3/6] x86/MPX: suppress base/index swapping in Intel mode for bndmk, bndldx, and bndstx
- Authentication-results: sourceware.org; auth=none
- References: <5254349502000078000F9A3D at nat28 dot tlf dot novell dot com> <525435E002000078000F9A55 at nat28 dot tlf dot novell dot com>
On Tue, Oct 8, 2013 at 7:42 AM, Jan Beulich <JBeulich@suse.com> wrote:
> bndmk, bndldx, and bndstx assign special meaning to base and index
> registers, and hence silently swapping the registers should be
> suppressed.
>
> gas/
> 2013-10-08 Jan Beulich <jbeulich@suse.com>
>
> * tc-i386.c (i386_intel_simplify_register): Suppress base/index
> swapping for bndmk, bndldx, and bndstx.
>
> --- 2013-10-07/gas/config/tc-i386-intel.c
> +++ 2013-10-07/gas/config/tc-i386-intel.c
> @@ -291,6 +291,8 @@ i386_intel_simplify_register (expression
> else if (!intel_state.index)
> {
> if (intel_state.in_scale
> + || current_templates->start->base_opcode == 0xf30f1b /* bndmk */
> + || (current_templates->start->base_opcode & ~1) == 0x0f1a /* bnd{ld,st}x */
> || i386_regtab[reg_num].reg_type.bitfield.baseindex)
> intel_state.index = i386_regtab + reg_num;
> else
>
>
>
We need a testcase for this.
--
H.J.