Signed-off-by: Richard Henderson <r...@twiddle.net>
---
target-i386/translate.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 53 insertions(+), 1 deletion(-)
diff --git a/target-i386/translate.c b/target-i386/translate.c
index ada0dec..69bb6c6 100644
--- a/target-i386/translate.c
+++ b/target-i386/translate.c
@@ -75,6 +75,8 @@ static TCGv cpu_cc_dst, cpu_cc_src, cpu_cc_src2, cpu_cc_srcT;
static TCGv_i32 cpu_cc_op;
static TCGv cpu_regs[CPU_NB_REGS];
static TCGv cpu_seg_base[6];
+static TCGv_i64 cpu_bndl[4];
+static TCGv_i64 cpu_bndu[4];
/* local temps */
static TCGv cpu_T0, cpu_T1;
/* local register indexes (only used inside old micro ops) */
@@ -7514,7 +7516,41 @@ static target_ulong disas_insn(CPUX86State *env,
DisasContext *s,
break;
}
break;
- case 0x119 ... 0x11f: /* nop (multi byte) */
+ case 0x11b:
+ modrm = cpu_ldub_code(env, s->pc++);
+ if (s->flags & HF_MPX_EN_MASK) {
+ mod = (modrm >> 6) & 3;
+ reg = ((modrm >> 3) & 7) | rex_r;
+ if (mod != 3 && (prefixes & PREFIX_REPZ)) {
+ /* bndmk */
+ if (reg >= 4
+ || (prefixes & PREFIX_LOCK)
+ || s->aflag == MO_16) {
+ goto illegal_op;
+ }
+ AddressParts a = gen_lea_modrm_0(env, s, modrm);
+ if (a.base >= 0) {
+ tcg_gen_extu_tl_i64(cpu_bndl[reg], cpu_regs[a.base]);
+ } else if (a.base == -1) {
+ /* no base register has lower bound of 0 */
+ tcg_gen_movi_i64(cpu_bndl[reg], 0);
+ } else {
+ /* rip-relative generates #ud */
+ goto illegal_op;
+ }
+ tcg_gen_not_tl(cpu_A0, gen_lea_modrm_1(a));
+ if (!CODE64(s)) {
+ tcg_gen_ext32u_tl(cpu_A0, cpu_A0);
+ }
+ tcg_gen_extu_tl_i64(cpu_bndu[reg], cpu_A0);
+ /* bnd registers are now in-use */
+ gen_set_hflag(s, HF_MPX_IU_MASK);
+ break;
+ }
+ }
+ gen_nop_modrm(env, s, modrm);
+ break;
+ case 0x119: case 0x11a: case 0x11c ... 0x11f: /* nop (multi byte) */
modrm = cpu_ldub_code(env, s->pc++);
gen_nop_modrm(env, s, modrm);
break;
@@ -7857,6 +7893,12 @@ void optimize_flags_init(void)
[R_GS] = "gs_base",
[R_SS] = "ss_base",
};
+ static const char bnd_regl_names[4][8] = {
+ "bnd0_lb", "bnd1_lb", "bnd2_lb", "bnd3_lb"
+ };
+ static const char bnd_regu_names[4][8] = {
+ "bnd0_ub", "bnd1_ub", "bnd2_ub", "bnd3_ub"
+ };
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
@@ -7881,6 +7923,16 @@ void optimize_flags_init(void)
offsetof(CPUX86State, segs[i].base),
seg_base_names[i]);
}
+ for (i = 0; i < 4; ++i) {
+ cpu_bndl[i]
+ = tcg_global_mem_new_i64(TCG_AREG0,
+ offsetof(CPUX86State, bnd_regs[i].lb),
+ bnd_regl_names[i]);
+ cpu_bndu[i]
+ = tcg_global_mem_new_i64(TCG_AREG0,
+ offsetof(CPUX86State, bnd_regs[i].ub),
+ bnd_regu_names[i]);
+ }
}
/* generate intermediate code in gen_opc_buf and gen_opparam_buf for
--
2.4.3
