From 1cd196ea42c526549ded4fd29809c3fdaa4a7f41 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Tue, 13 Sep 2011 10:45:51 +0300 Subject: KVM: x86 emulator: convert push %sreg/pop %sreg to direct decode Signed-off-by: Avi Kivity Signed-off-by: Marcelo Tosatti --- arch/x86/kvm/emulate.c | 44 +++++++++++++++----------------------------- 1 file changed, 15 insertions(+), 29 deletions(-) (limited to 'arch/x86/kvm/emulate.c') diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index bd3e488c734..f1e3be18a08 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -1458,15 +1458,18 @@ static int em_popf(struct x86_emulate_ctxt *ctxt) return emulate_popf(ctxt, &ctxt->dst.val, ctxt->op_bytes); } -static int emulate_push_sreg(struct x86_emulate_ctxt *ctxt, int seg) +static int em_push_sreg(struct x86_emulate_ctxt *ctxt) { + int seg = ctxt->src2.val; + ctxt->src.val = get_segment_selector(ctxt, seg); return em_push(ctxt); } -static int emulate_pop_sreg(struct x86_emulate_ctxt *ctxt, int seg) +static int em_pop_sreg(struct x86_emulate_ctxt *ctxt) { + int seg = ctxt->src2.val; unsigned long selector; int rc; @@ -3114,19 +3117,20 @@ static struct gprefix pfx_0f_6f_0f_7f = { static struct opcode opcode_table[256] = { /* 0x00 - 0x07 */ I6ALU(Lock, em_add), - D(ImplicitOps | Stack | No64 | Src2ES), - D(ImplicitOps | Stack | No64 | Src2ES), + I(ImplicitOps | Stack | No64 | Src2ES, em_push_sreg), + I(ImplicitOps | Stack | No64 | Src2ES, em_pop_sreg), /* 0x08 - 0x0F */ I6ALU(Lock, em_or), - D(ImplicitOps | Stack | No64 | Src2CS), N, + I(ImplicitOps | Stack | No64 | Src2CS, em_push_sreg), + N, /* 0x10 - 0x17 */ I6ALU(Lock, em_adc), - D(ImplicitOps | Stack | No64 | Src2SS), - D(ImplicitOps | Stack | No64 | Src2SS), + I(ImplicitOps | Stack | No64 | Src2SS, em_push_sreg), + I(ImplicitOps | Stack | No64 | Src2SS, em_pop_sreg), /* 0x18 - 0x1F */ I6ALU(Lock, em_sbb), - D(ImplicitOps | Stack | No64 | Src2DS), - D(ImplicitOps | Stack | No64 | Src2DS), + I(ImplicitOps | Stack | No64 | Src2DS, em_push_sreg), + I(ImplicitOps | Stack | No64 | Src2DS, em_pop_sreg), /* 0x20 - 0x27 */ I6ALU(Lock, em_and), N, N, /* 0x28 - 0x2F */ @@ -3270,12 +3274,12 @@ static struct opcode twobyte_table[256] = { /* 0x90 - 0x9F */ X16(D(ByteOp | DstMem | SrcNone | ModRM| Mov)), /* 0xA0 - 0xA7 */ - D(Stack | Src2FS), D(Stack | Src2FS), + I(Stack | Src2FS, em_push_sreg), I(Stack | Src2FS, em_pop_sreg), DI(ImplicitOps, cpuid), D(DstMem | SrcReg | ModRM | BitOp), D(DstMem | SrcReg | Src2ImmByte | ModRM), D(DstMem | SrcReg | Src2CL | ModRM), N, N, /* 0xA8 - 0xAF */ - D(Stack | Src2GS), D(Stack | Src2GS), + I(Stack | Src2GS, em_push_sreg), I(Stack | Src2GS, em_pop_sreg), DI(ImplicitOps, rsm), D(DstMem | SrcReg | ModRM | BitOp | Lock), D(DstMem | SrcReg | Src2ImmByte | ModRM), D(DstMem | SrcReg | Src2CL | ModRM), @@ -3839,16 +3843,6 @@ special_insn: goto twobyte_insn; switch (ctxt->b) { - case 0x06: /* push es */ - case 0x0e: /* push cs */ - case 0x16: /* push ss */ - case 0x1e: /* push ds */ - rc = emulate_push_sreg(ctxt, ctxt->src2.val); - break; - case 0x07: /* pop es */ - case 0x17: /* pop ss */ - case 0x1f: /* pop ds */ - rc = emulate_pop_sreg(ctxt, ctxt->src2.val); case 0x40 ... 0x47: /* inc r16/r32 */ emulate_1op(ctxt, "inc"); break; @@ -4097,14 +4091,6 @@ twobyte_insn: case 0x90 ... 0x9f: /* setcc r/m8 */ ctxt->dst.val = test_cc(ctxt->b, ctxt->eflags); break; - case 0xa0: /* push fs */ - case 0xa8: /* push gs */ - rc = emulate_push_sreg(ctxt, ctxt->src2.val); - break; - case 0xa1: /* pop fs */ - case 0xa9: /* pop gs */ - rc = emulate_pop_sreg(ctxt, ctxt->src2.val); - break; case 0xa3: bt: /* bt */ ctxt->dst.type = OP_NONE; -- cgit v1.2.3-70-g09d2