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| author | Richard Henderson <rth@twiddle.net> | 2015-11-18 12:55:47 +0100 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2016-02-15 14:50:00 +1100 |
| commit | 07929f2ab2ab9c9e01d4ae79f48f2b2476b715c8 (patch) | |
| tree | 5df97c0cda565f1a3156b6dd6c60a8ea0902cf30 /target-i386/translate.c | |
| parent | a114d25d5b42600871d75929604c0b9fcc448ec0 (diff) | |
| download | qemu-07929f2ab2ab9c9e01d4ae79f48f2b2476b715c8.tar.gz | |
target-i386: Implement FSGSBASE
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-i386/translate.c')
| -rw-r--r-- | target-i386/translate.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/target-i386/translate.c b/target-i386/translate.c index ad7053ea1a..9171929fc7 100644 --- a/target-i386/translate.c +++ b/target-i386/translate.c @@ -7902,6 +7902,40 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s, gen_nop_modrm(env, s, modrm); break; + case 0xc0 ... 0xc7: /* rdfsbase (f3 0f ae /0) */ + case 0xc8 ... 0xc8: /* rdgsbase (f3 0f ae /1) */ + case 0xd0 ... 0xd7: /* wrfsbase (f3 0f ae /2) */ + case 0xd8 ... 0xd8: /* wrgsbase (f3 0f ae /3) */ + if (CODE64(s) + && (prefixes & PREFIX_REPZ) + && !(prefixes & PREFIX_LOCK) + && (s->cpuid_7_0_ebx_features & CPUID_7_0_EBX_FSGSBASE)) { + TCGv base, treg, src, dst; + + /* Preserve hflags bits by testing CR4 at runtime. */ + tcg_gen_movi_i32(cpu_tmp2_i32, CR4_FSGSBASE_MASK); + gen_helper_cr4_testbit(cpu_env, cpu_tmp2_i32); + + base = cpu_seg_base[modrm & 8 ? R_GS : R_FS]; + treg = cpu_regs[(modrm & 7) | REX_B(s)]; + + if (modrm & 0x10) { + /* wr*base */ + dst = base, src = treg; + } else { + /* rd*base */ + dst = treg, src = base; + } + + if (s->dflag == MO_32) { + tcg_gen_ext32u_tl(dst, src); + } else { + tcg_gen_mov_tl(dst, src); + } + break; + } + goto illegal_op; + case 0xf8: /* sfence / pcommit */ if (prefixes & PREFIX_DATA) { /* pcommit */ |