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Fix short form jump issue, minor fix

This commit is contained in:
ZaneYork 2020-09-16 20:10:15 +08:00
parent d80028e8a8
commit 675b9886d5
1 changed files with 39 additions and 3 deletions
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42
src/SMAPI/Framework/ModLoading/Rewriters/BrokenShortJumpRewriter.cs
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@ -23,15 +23,51 @@ namespace StardewModdingAPI.Framework.ModLoading.Rewriters
public override bool Handle(ModuleDefinition module, ILProcessor cil, Instruction instruction)
{
// get method ref
bool rewritten = false;
// dynamic inserted instruction
if (instruction.Offset == 0 && instruction.Previous != null)
return false;
// rewrite does not insert instruction
if (!(instruction.Previous != null && instruction.Previous.Offset == 0
|| instruction.Next != null && instruction.Next.Offset == 0))
return false;
foreach (var ins in cil.Body.Instructions)
{
// dynamic inserted instruction
if(ins.Offset == 0)
continue;
OpCode targetOp = this.RewriteTarget(ins);
// not a jump instruction
if (targetOp == OpCodes.Nop)
continue;
// rewrite
ins.OpCode = targetOp;
Instruction insJumpTo = (Instruction) ins.Operand;
// jump forward
if (insJumpTo.Offset > ins.Offset)
{
// jump across the rewrite point
if(instruction.Offset > ins.Offset && instruction.Offset < insJumpTo.Offset)
{
// rewrite
ins.OpCode = targetOp;
rewritten = true;
}
}
// jump backward
else
{
// jump across the rewrite point
if(instruction.Offset > insJumpTo.Offset && instruction.Offset < ins.Offset)
{
// rewrite
ins.OpCode = targetOp;
rewritten = true;
}
}
}
return this.MarkRewritten();
if(rewritten)
return this.MarkRewritten();
return false;
}