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target/i386: do not accept RDSEED if CPUID bit absent

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Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2023-06-21 00:43:22 +02:00
parent 691925e5a3
commit f9e0dbae78
1 changed files with 8 additions and 0 deletions
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8
target/i386/tcg/translate.c
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@ -3925,12 +3925,20 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
break;
case 7: /* RDSEED */
if (mod != 3 ||
(s->prefix & (PREFIX_LOCK | PREFIX_REPZ | PREFIX_REPNZ)) ||
!(s->cpuid_7_0_ebx_features & CPUID_7_0_EBX_RDSEED)) {
goto illegal_op;
}
goto do_rdrand;
case 6: /* RDRAND */
if (mod != 3 ||
(s->prefix & (PREFIX_LOCK | PREFIX_REPZ | PREFIX_REPNZ)) ||
!(s->cpuid_ext_features & CPUID_EXT_RDRAND)) {
goto illegal_op;
}
do_rdrand:
translator_io_start(&s->base);
gen_helper_rdrand(s->T0, cpu_env);
rm = (modrm & 7) | REX_B(s);