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target-i386: Implement BNDMK 

Signed-off-by: Richard Henderson <rth@twiddle.net>
master
Richard Henderson 2015-07-09 08:22:46 +01:00
parent a074ce42a3
commit 149b427b32
1 changed files with 57 additions and 1 deletions
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58
target-i386/translate.c
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@ -71,6 +71,8 @@ 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) */
@ -7438,7 +7440,44 @@ 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]);
if (!CODE64(s)) {
tcg_gen_ext32u_i64(cpu_bndl[reg], cpu_bndl[reg]);
}
} 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;
@ -7803,6 +7842,12 @@ void tcg_x86_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");
@ -7828,6 +7873,17 @@ void tcg_x86_init(void)
seg_base_names[i]);
}
for (i = 0; i < 4; ++i) {
cpu_bndl[i]
= tcg_global_mem_new_i64(cpu_env,
offsetof(CPUX86State, bnd_regs[i].lb),
bnd_regl_names[i]);
cpu_bndu[i]
= tcg_global_mem_new_i64(cpu_env,
offsetof(CPUX86State, bnd_regs[i].ub),
bnd_regu_names[i]);
}
helper_lock_init();
}