0957b409a9
Disabled by default, used by loader and sbin/veriexec Reviewed by: emaste Sponsored by: Juniper Networks Differential Revision: D16334
65 lines
1.7 KiB
C#
65 lines
1.7 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;
|
|
|
|
abstract class OpcodeJump : Opcode {
|
|
|
|
int disp;
|
|
|
|
internal OpcodeJump() : this(Int32.MinValue)
|
|
{
|
|
}
|
|
|
|
internal OpcodeJump(int disp)
|
|
{
|
|
this.disp = disp;
|
|
}
|
|
|
|
internal override int JumpDisp {
|
|
get {
|
|
return disp;
|
|
}
|
|
}
|
|
|
|
internal override void Run(CPU cpu)
|
|
{
|
|
cpu.ipOff += disp;
|
|
}
|
|
|
|
internal override void ResolveJump(int disp)
|
|
{
|
|
if (this.disp != Int32.MinValue) {
|
|
throw new Exception("Jump already resolved");
|
|
}
|
|
this.disp = disp;
|
|
}
|
|
|
|
internal override void FixUp(CodeElement[] gcode, int off)
|
|
{
|
|
gcode[off].SetJumpTarget(gcode[off + 1 + disp]);
|
|
}
|
|
}
|