diff options
| author | Avi Kivity <avi@redhat.com> | 2010-08-18 15:12:09 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-10-24 10:51:12 +0200 |
| commit | 40ece7c7297da90e54e147d3bfbb4531f9fbc570 (patch) | |
| tree | d110faf0128a5a1d017ee34e283e882923bf18ef | |
| parent | b250e605895d02cede78922d034f7825af72a8b5 (diff) | |
KVM: x86 emulator: implement RET imm16 (opcode C2)
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/x86/kvm/emulate.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index db80e28471da..9e58f5054c39 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2249,6 +2249,21 @@ static int em_call_far(struct x86_emulate_ctxt *ctxt) return X86EMUL_CONTINUE; } +static int em_ret_near_imm(struct x86_emulate_ctxt *ctxt) +{ + struct decode_cache *c = &ctxt->decode; + int rc; + + c->dst.type = OP_REG; + c->dst.addr.reg = &c->eip; + c->dst.bytes = c->op_bytes; + rc = emulate_pop(ctxt, ctxt->ops, &c->dst.val, c->op_bytes); + if (rc != X86EMUL_CONTINUE) + return rc; + register_address_increment(c, &c->regs[VCPU_REGS_RSP], c->src.val); + return X86EMUL_CONTINUE; +} + #define D(_y) { .flags = (_y) } #define N D(0) #define G(_f, _g) { .flags = ((_f) | Group), .u.group = (_g) } @@ -2394,7 +2409,9 @@ static struct opcode opcode_table[256] = { X8(D(DstReg | SrcImm | Mov)), /* 0xC0 - 0xC7 */ D(ByteOp | DstMem | SrcImm | ModRM), D(DstMem | SrcImmByte | ModRM), - N, D(ImplicitOps | Stack), N, N, + I(ImplicitOps | Stack | SrcImmU16, em_ret_near_imm), + D(ImplicitOps | Stack), + N, N, D(ByteOp | DstMem | SrcImm | ModRM | Mov), D(DstMem | SrcImm | ModRM | Mov), /* 0xC8 - 0xCF */ N, N, N, D(ImplicitOps | Stack), |