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x86::trans: handle illegal case for opc c6/c7

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Reference Intel software developer manual vol2 Appendix A Table A-6 for
detailed decoding information.

Signed-off-by: vardyh <vardyh.dev@gmail.com>
This commit is contained in:
vardyh 2017-05-25 15:22:45 +08:00
parent 6d8031eca4
commit ad767abda8
1 changed files with 6 additions and 0 deletions
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6
qemu/target-i386/translate.c
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@ -6005,9 +6005,15 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
ot = mo_b_d(b, dflag); ot = mo_b_d(b, dflag);
modrm = cpu_ldub_code(env, s->pc++); modrm = cpu_ldub_code(env, s->pc++);
mod = (modrm >> 6) & 3; mod = (modrm >> 6) & 3;
reg = ((modrm >> 3) & 7) | rex_r;
if (mod != 3) { if (mod != 3) {
if (reg != 0)
goto illegal_op;
s->rip_offset = insn_const_size(ot); s->rip_offset = insn_const_size(ot);
gen_lea_modrm(env, s, modrm); gen_lea_modrm(env, s, modrm);
} else {
if (reg != 0 && reg != 7)
goto illegal_op;
} }
val = insn_get(env, s, ot); val = insn_get(env, s, ot);
tcg_gen_movi_tl(tcg_ctx, *cpu_T[0], val); tcg_gen_movi_tl(tcg_ctx, *cpu_T[0], val);