haraldwolff/qemu-patch-raspberry4
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target-i386: Implement BNDCL, BNDCU, BNDCN

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Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2015-07-06 19:37:00 +01:00
parent 62b58ba58b
commit 523e28d761
3 changed files with 53 additions and 1 deletions
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2
target-i386/helper.h
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@ -16,6 +16,8 @@ DEF_HELPER_2(divq_EAX, void, env, tl)
DEF_HELPER_2(idivq_EAX, void, env, tl)
#endif
DEF_HELPER_FLAGS_2(bndck, TCG_CALL_NO_WG, void, env, i32)
DEF_HELPER_2(aam, void, env, int)
DEF_HELPER_2(aad, void, env, int)
DEF_HELPER_1(aaa, void, env)

8
target-i386/mpx_helper.c
View file

@ -51,3 +51,11 @@ void cpu_sync_bndcs_hflags(CPUX86State *env)
env->hflags = hflags;
env->hflags2 = hflags2;
}
void helper_bndck(CPUX86State *env, uint32_t fail)
{
if (unlikely(fail)) {
env->bndcs_regs.sts = 1;
raise_exception_ra(env, EXCP05_BOUND, GETPC());
}
}

44
target-i386/translate.c
View file

@ -1989,6 +1989,21 @@ static void gen_nop_modrm(CPUX86State *env, DisasContext *s, int modrm)
(void)gen_lea_modrm_0(env, s, modrm);
}
/* Used for BNDCL, BNDCU, BNDCN. */
static void gen_bndck(CPUX86State *env, DisasContext *s, int modrm,
TCGCond cond, TCGv_i64 bndv)
{
TCGv ea = gen_lea_modrm_1(gen_lea_modrm_0(env, s, modrm));
tcg_gen_extu_tl_i64(cpu_tmp1_i64, ea);
if (!CODE64(s)) {
tcg_gen_ext32u_i64(cpu_tmp1_i64, cpu_tmp1_i64);
}
tcg_gen_setcond_i64(cond, cpu_tmp1_i64, cpu_tmp1_i64, bndv);
tcg_gen_extrl_i64_i32(cpu_tmp2_i32, cpu_tmp1_i64);
gen_helper_bndck(cpu_env, cpu_tmp2_i32);
}
/* used for LEA and MOV AX, mem */
static void gen_add_A0_ds_seg(DisasContext *s)
{
@ -7445,7 +7460,26 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
if (s->flags & HF_MPX_EN_MASK) {
mod = (modrm >> 6) & 3;
reg = ((modrm >> 3) & 7) | rex_r;
if (prefixes & PREFIX_DATA) {
if (prefixes & PREFIX_REPZ) {
/* bndcl */
if (reg >= 4
|| (prefixes & PREFIX_LOCK)
|| s->aflag == MO_16) {
goto illegal_op;
}
gen_bndck(env, s, modrm, TCG_COND_LTU, cpu_bndl[reg]);
} else if (prefixes & PREFIX_REPNZ) {
/* bndcu */
if (reg >= 4
|| (prefixes & PREFIX_LOCK)
|| s->aflag == MO_16) {
goto illegal_op;
}
TCGv_i64 notu = tcg_temp_new_i64();
tcg_gen_not_i64(notu, cpu_bndu[reg]);
gen_bndck(env, s, modrm, TCG_COND_GTU, notu);
tcg_temp_free_i64(notu);
} else if (prefixes & PREFIX_DATA) {
/* bndmov -- from reg/mem */
if (reg >= 4 || s->aflag == MO_16) {
goto illegal_op;
@ -7514,6 +7548,14 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
/* bnd registers are now in-use */
gen_set_hflag(s, HF_MPX_IU_MASK);
break;
} else if (prefixes & PREFIX_REPNZ) {
/* bndcn */
if (reg >= 4
|| (prefixes & PREFIX_LOCK)
|| s->aflag == MO_16) {
goto illegal_op;
}
gen_bndck(env, s, modrm, TCG_COND_GTU, cpu_bndu[reg]);
} else if (prefixes & PREFIX_DATA) {
/* bndmov -- to reg/mem */
if (reg >= 4 || s->aflag == MO_16) {