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target/i386: rdpkru/wrpkru are no-prefix instructions 

Reject 0x66/0xf3/0xf2 in front of them.

Cc: qemu-stable@nongnu.org
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2024-05-09 15:55:47 +02:00
parent 41c685dc59
commit 40a3ec7b5f
1 changed files with 4 additions and 2 deletions
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6
target/i386/tcg/translate.c
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@ -3907,7 +3907,8 @@ static void disas_insn_old(DisasContext *s, CPUState *cpu, int b)
gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 1);
break;
case 0xee: /* rdpkru */
if (prefixes & PREFIX_LOCK) {
if (s->prefix & (PREFIX_LOCK | PREFIX_DATA
| PREFIX_REPZ | PREFIX_REPNZ)) {
goto illegal_op;
}
tcg_gen_trunc_tl_i32(s->tmp2_i32, cpu_regs[R_ECX]);
@ -3915,7 +3916,8 @@ static void disas_insn_old(DisasContext *s, CPUState *cpu, int b)
tcg_gen_extr_i64_tl(cpu_regs[R_EAX], cpu_regs[R_EDX], s->tmp1_i64);
break;
case 0xef: /* wrpkru */
if (prefixes & PREFIX_LOCK) {
if (s->prefix & (PREFIX_LOCK | PREFIX_DATA
| PREFIX_REPZ | PREFIX_REPNZ)) {
goto illegal_op;
}
tcg_gen_concat_tl_i64(s->tmp1_i64, cpu_regs[R_EAX],