>>> On 03.03.17 at 15:58, <jbeul...@suse.com> wrote:
> @@ -6183,6 +6579,76 @@ x86_emulate(
> goto cannot_emulate;
> }
>
> + if ( state->simd_size )
> + {
> +#ifdef __XEN__
> + uint8_t *buf = stub.ptr;
> +#else
> + uint8_t *buf = get_stub(stub);
> +#endif
> +
> + generate_exception_if(!op_bytes, EXC_UD);
> + generate_exception_if(vex.opcx && (d & TwoOp) && vex.reg != 0xf,
> + EXC_UD);
> +
> + if ( !buf )
> + BUG();
> + if ( vex.opcx == vex_none )
> + SET_SSE_PREFIX(buf[0], vex.pfx);
> +
> + buf[fic.insn_bytes] = 0xc3;
> + copy_REX_VEX(buf, rex_prefix, vex);
> +
> + if ( ea.type == OP_MEM )
> + {
> + uint32_t mxcsr = 0;
> +
> + if ( op_bytes < 16 ||
> + (vex.opcx
> + ? /* vmov{a,nt}p{s,d} are exceptions. */
> + ext != ext_0f || ((b | 1) != 0x29 && b != 0x2b)
> + : /* movup{s,d} and lddqu are exceptions. */
> + ext == ext_0f && ((b | 1) == 0x11 || b == 0xf0)) )
> + mxcsr = MXCSR_MM;
> + else if ( vcpu_has_misalignsse() )
> + asm ( "stmxcsr %0" : "=m" (mxcsr) );
> + generate_exception_if(!(mxcsr & MXCSR_MM) &&
> + !is_aligned(ea.mem.seg, ea.mem.off,
> op_bytes,
> + ctxt, ops),
> + EXC_GP, 0);
> + if ( (d & SrcMask) == SrcMem )
> + {
> + rc = ops->read(ea.mem.seg, ea.mem.off, mmvalp, op_bytes,
> ctxt);
> + if ( rc != X86EMUL_OKAY )
> + goto done;
> + dst.type = OP_NONE;
> + }
> + else if ( (d & DstMask) == DstMem )
> + {
> + fail_if(!ops->write); /* Check before running the stub. */
> + ASSERT(d & Mov);
> + dst.type = OP_MEM;
> + dst.bytes = op_bytes;
> + dst.mem = ea.mem;
> + }
> + else if ( (d & SrcMask) == SrcMem16 )
> + dst.type = OP_NONE;
> + else
> + {
> + ASSERT_UNREACHABLE();
> + return X86EMUL_UNHANDLEABLE;
I've changed this to "goto cannot_emulate" to be on the safe side
on production builds (to avoid bypassing put_fpu() / put_stub()).
Jan
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