0957b409a9
Disabled by default, used by loader and sbin/veriexec Reviewed by: emaste Sponsored by: Juniper Networks Differential Revision: D16334
96 lines
2.5 KiB
C#
96 lines
2.5 KiB
C#
/*
|
|
* Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
|
|
class OpcodeConst : Opcode {
|
|
|
|
TValue val;
|
|
|
|
internal OpcodeConst(TValue val)
|
|
{
|
|
this.val = val;
|
|
}
|
|
|
|
internal override void Run(CPU cpu)
|
|
{
|
|
cpu.Push(val);
|
|
}
|
|
|
|
internal override Word GetReference(T0Comp ctx)
|
|
{
|
|
TPointerXT xt = val.ptr as TPointerXT;
|
|
if (xt == null) {
|
|
return null;
|
|
}
|
|
xt.Resolve(ctx);
|
|
return xt.Target;
|
|
}
|
|
|
|
internal override ConstData GetDataBlock(T0Comp ctx)
|
|
{
|
|
TPointerBlob bp = val.ptr as TPointerBlob;
|
|
return bp == null ? null : bp.Blob;
|
|
}
|
|
|
|
internal override CodeElement ToCodeElement()
|
|
{
|
|
if (val.ptr == null) {
|
|
return new CodeElementUIntInt(1, val.Int);
|
|
}
|
|
TPointerXT xt = val.ptr as TPointerXT;
|
|
if (xt != null) {
|
|
if (val.x != 0) {
|
|
throw new Exception(
|
|
"Cannot compile XT: non-zero offset");
|
|
}
|
|
return new CodeElementUIntInt(1, xt.Target.Slot);
|
|
}
|
|
TPointerBlob bp = val.ptr as TPointerBlob;
|
|
if (bp != null) {
|
|
return new CodeElementUIntInt(1,
|
|
val.x + bp.Blob.Address);
|
|
}
|
|
TPointerExpr cx = val.ptr as TPointerExpr;
|
|
if (cx != null) {
|
|
return new CodeElementUIntExpr(1, cx, val.x);
|
|
}
|
|
throw new Exception(String.Format(
|
|
"Cannot embed constant (type = {0})",
|
|
val.ptr.GetType().FullName));
|
|
}
|
|
|
|
internal override int StackAction {
|
|
get {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
public override string ToString()
|
|
{
|
|
return "const " + val.ToString();
|
|
}
|
|
}
|