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KVM: x86 emulator: implement RET imm16 (opcode C2)

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Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2010-08-18 15:12:09 +03:00
parent b250e60589
commit 40ece7c729
1 changed files with 18 additions and 1 deletions
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19
arch/x86/kvm/emulate.c
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@ -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),