This allows us to reuse the code without populating ctxt->src and
overriding ctxt->op_bytes.
Signed-off-by: Avi Kivity <a...@redhat.com>
---
arch/x86/kvm/emulate.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 25eab1b..8d3167c 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1496,17 +1496,22 @@ static int writeback(struct x86_emulate_ctxt *ctxt)
return X86EMUL_CONTINUE;
}
-static int em_push(struct x86_emulate_ctxt *ctxt)
+static int push(struct x86_emulate_ctxt *ctxt, void *data, int bytes)
{
struct segmented_address addr;
- register_address_increment(ctxt, &ctxt->regs[VCPU_REGS_RSP],
-ctxt->op_bytes);
+ register_address_increment(ctxt, &ctxt->regs[VCPU_REGS_RSP], -bytes);
addr.ea = register_address(ctxt, ctxt->regs[VCPU_REGS_RSP]);
addr.seg = VCPU_SREG_SS;
+ return segmented_write(ctxt, addr, data, bytes);
+}
+
+static int em_push(struct x86_emulate_ctxt *ctxt)
+{
/* Disable writeback. */
ctxt->dst.type = OP_NONE;
- return segmented_write(ctxt, addr, &ctxt->src.val, ctxt->op_bytes);
+ return push(ctxt, &ctxt->src.val, ctxt->op_bytes);
}
static int emulate_pop(struct x86_emulate_ctxt *ctxt,
--
1.7.10.1
--
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