From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Thu, 9 May 2024 15:55:47 +0200 Subject: [PATCH] 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 Signed-off-by: Paolo Bonzini (cherry picked from commit 40a3ec7b5ffde500789d016660a171057d6b467c) Signed-off-by: Fiona Ebner --- target/i386/tcg/translate.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c index b60f3bd642..3e949fe964 100644 --- a/target/i386/tcg/translate.c +++ b/target/i386/tcg/translate.c @@ -6083,7 +6083,8 @@ static bool disas_insn(DisasContext *s, CPUState *cpu) 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]); @@ -6091,7 +6092,8 @@ static bool disas_insn(DisasContext *s, CPUState *cpu) 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],