From 782b877c8073a9ef307ad6638ee472b8336b2b85 Mon Sep 17 00:00:00 2001 From: Gleb Natapov Date: Sun, 12 Apr 2009 13:36:25 +0300 Subject: [PATCH] KVM: x86 emulator: Complete ljmp decoding at decode stage Signed-off-by: Gleb Natapov Signed-off-by: Avi Kivity --- arch/x86/kvm/x86_emulate.c | 25 +++++-------------------- 1 file changed, 5 insertions(+), 20 deletions(-) diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c index 71b4bee2e221..8779cf233a83 100644 --- a/arch/x86/kvm/x86_emulate.c +++ b/arch/x86/kvm/x86_emulate.c @@ -193,7 +193,7 @@ static u32 opcode_table[256] = { SrcNone | ByteOp | ImplicitOps, SrcNone | ImplicitOps, /* 0xE8 - 0xEF */ ImplicitOps | Stack, SrcImm | ImplicitOps, - ImplicitOps, SrcImmByte | ImplicitOps, + SrcImm | Src2Imm16, SrcImmByte | ImplicitOps, SrcNone | ByteOp | ImplicitOps, SrcNone | ImplicitOps, SrcNone | ByteOp | ImplicitOps, SrcNone | ImplicitOps, /* 0xF0 - 0xF7 */ @@ -1805,30 +1805,15 @@ special_insn: } case 0xe9: /* jmp rel */ goto jmp; - case 0xea: /* jmp far */ { - uint32_t eip; - uint16_t sel; - - switch (c->op_bytes) { - case 2: - eip = insn_fetch(u16, 2, c->eip); - break; - case 4: - eip = insn_fetch(u32, 4, c->eip); - break; - default: - DPRINTF("jmp far: Invalid op_bytes\n"); - goto cannot_emulate; - } - sel = insn_fetch(u16, 2, c->eip); - if (kvm_load_segment_descriptor(ctxt->vcpu, sel, 9, VCPU_SREG_CS) < 0) { + case 0xea: /* jmp far */ + if (kvm_load_segment_descriptor(ctxt->vcpu, c->src2.val, 9, + VCPU_SREG_CS) < 0) { DPRINTF("jmp far: Failed to load CS descriptor\n"); goto cannot_emulate; } - c->eip = eip; + c->eip = c->src.val; break; - } case 0xeb: jmp: /* jmp rel short */ jmp_rel(c, c->src.val);