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Instruction.cpp
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/* Software License Agreement
*
* Copyright(C) 1994-2023 David Lindauer, (LADSoft)
*
* This file is part of the Orange C Compiler package.
*
* The Orange C Compiler package is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The Orange C Compiler package is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Orange C. If not, see <http://www.gnu.org/licenses/>.
*
* contact information:
* email: [email protected] <David Lindauer>
*
*/
#include "DotNetPELib.h"
#include <cfloat>
namespace DotNetPELib
{
Instruction::InstructionName Instruction::instructions_[] = {
{"<unknown>", 0, (Byte)-1, 0, o_none, 0},
{".label", 0, (Byte)-1, 0, o_none, 0},
{".comment", 0, (Byte)-1, 0, o_none, 0},
{".SEH", 0, (Byte)-1, 0, o_none, 0},
{"add", 0x58, (Byte)-1, 1, o_single, -1},
{"add.ovf", 0xd6, (Byte)-1, 1, o_single, -1},
{"add.ovf.un", 0xd7, (Byte)-1, 1, o_single, -1},
{"and", 0x5f, (Byte)-1, 1, o_single, -1},
{"arglist", 0xfe, 0, 2, o_single, 1},
{"beq", 0x3b, (Byte)-1, 5, o_rel4, -2},
{"beq.s", 0x2e, (Byte)-1, 2, o_rel1, -2},
{"bge", 0x3c, (Byte)-1, 5, o_rel4, -2},
{"bge.s", 0x2f, (Byte)-1, 2, o_rel1, -2},
{"bge.un", 0x41, (Byte)-1, 5, o_rel4, -2},
{"bge.un.s", 0x34, (Byte)-1, 2, o_rel1, -2},
{"bgt", 0x3d, (Byte)-1, 5, o_rel4, -2},
{"bgt.s", 0x30, (Byte)-1, 2, o_rel1, -2},
{"bgt.un", 0x42, (Byte)-1, 5, o_rel4, -2},
{"bgt.un.s", 0x35, (Byte)-1, 2, o_rel1, -2},
{"ble", 0x3e, (Byte)-1, 5, o_rel4, -2},
{"ble.s", 0x31, (Byte)-1, 2, o_rel1, -2},
{"ble.un", 0x43, (Byte)-1, 5, o_rel4, -2},
{"ble.un.s", 0x36, (Byte)-1, 2, o_rel1, -2},
{"blt", 0x3f, (Byte)-1, 5, o_rel4, -2},
{"blt.s", 0x32, (Byte)-1, 2, o_rel1, -2},
{"blt.un", 0x44, (Byte)-1, 5, o_rel4, -2},
{"blt.un.s", 0x37, (Byte)-1, 2, o_rel1, -2},
{"bne.un", 0x40, (Byte)-1, 5, o_rel4, -2},
{"bne.un.s", 0x33, (Byte)-1, 2, o_rel1, -2},
{"box", 0x8c, (Byte)-1, 5, o_index4, 0},
{"br", 0x38, (Byte)-1, 5, o_rel4, 0},
{"br.s", 0x2b, (Byte)-1, 2, o_rel1, 0},
{"break", 0x01, (Byte)-1, 1, o_single, 0},
{"brfalse", 0x39, (Byte)-1, 5, o_rel4, -1},
{"brfalse.s", 0x2c, (Byte)-1, 2, o_rel1, -1},
{"brinst", 0x3a, (Byte)-1, 5, o_rel4, -1},
{"brinst.s", 0x2d, (Byte)-1, 2, o_rel1, -1},
{"brnull", 0x39, (Byte)-1, 5, o_rel4, -1},
{"brnull.s", 0x2c, (Byte)-1, 2, o_rel1, -1},
{"brtrue", 0x3a, (Byte)-1, 5, o_rel4, -1},
{"brtrue.s", 0x2d, (Byte)-1, 2, o_rel1, -1},
{"brzero", 0x39, (Byte)-1, 5, o_rel4, -1},
{"brzero.s", 0x2c, (Byte)-1, 2, o_rel1, -1},
{"call", 0x28, (Byte)-1, 5, o_index4, 0}, // - args + 1 if rv nonvoid
{"calli", 0x29, (Byte)-1, 5, o_index4, -1}, // - args + 1 if rv nonvoid
{"callvirt", 0x6f, (Byte)-1, 5, o_index4, 0}, // - args + 1 if rv nonvoid
{"castclass", 0x74, (Byte)-1, 5, o_index4, 0},
{"ceq", 0xfe, 1, 2, o_single, -1},
{"cgt", 0xfe, 2, 2, o_single, -1},
{"cgt.un", 0xfe, 3, 2, o_single, -1},
{"ckfinite", 0xc3, (Byte)-1, 1, o_single, 0},
{"clt", 0xfe, 4, 2, o_single, -1},
{"clt.un", 0xfe, 5, 2, o_single, -1},
{"constrained.", 0xfe, 0x16, 6, o_index4, 0},
{"conv.i", 0xd3, (Byte)-1, 1, o_single, 0},
{"conv.i1", 0x67, (Byte)-1, 1, o_single, 0},
{"conv.i2", 0x68, (Byte)-1, 1, o_single, 0},
{"conv.i4", 0x69, (Byte)-1, 1, o_single, 0},
{"conv.i8", 0x6a, (Byte)-1, 1, o_single, 0},
{"conv.ovf.i", 0xd4, (Byte)-1, 1, o_single, 0},
{"conv.ovf.i.un", 0x8a, (Byte)-1, 1, o_single, 0},
{"conv.ovf.i1", 0xb3, (Byte)-1, 1, o_single, 0},
{"conv.ovf.i1.un", 0x82, (Byte)-1, 1, o_single, 0},
{"conv.ovf.i2", 0xb5, (Byte)-1, 1, o_single, 0},
{"conv.ovf.i2.un", 0x83, (Byte)-1, 1, o_single, 0},
{"conv.ovf.i4", 0xb7, (Byte)-1, 1, o_single, 0},
{"conv.ovf.i4.un", 0x84, (Byte)-1, 1, o_single, 0},
{"conv.ovf.i8", 0xb9, (Byte)-1, 1, o_single, 0},
{"conv.ovf.i8.un", 0x85, (Byte)-1, 1, o_single, 0},
{"conv.ovf.u", 0xd5, (Byte)-1, 1, o_single, 0},
{"conv.ovf.u.un", 0x8b, (Byte)-1, 1, o_single, 0},
{"conv.ovf.u1", 0xb4, (Byte)-1, 1, o_single, 0},
{"conv.ovf.u1.un", 0x86, (Byte)-1, 1, o_single},
{"conv.ovf.u2", 0xb6, (Byte)-1, 1, o_single, 0},
{"conv.ovf.u2.un", 0x87, (Byte)-1, 1, o_single, 0},
{"conv.ovf.u4", 0xb8, (Byte)-1, 1, o_single, 0},
{"conv.ovf.u4.un", 0x88, (Byte)-1, 1, o_single, 0},
{"conv.ovf.u8", 0xba, (Byte)-1, 1, o_single, 0},
{"conv.ovf.u8.un", 0x89, (Byte)-1, 1, o_single, 0},
{"conv.r.un", 0x76, (Byte)-1, 1, o_single, 0},
{"conv.r4", 0x6b, (Byte)-1, 1, o_single, 0},
{"conv.r8", 0x6c, (Byte)-1, 1, o_single, 0},
{"conv.u", 0xe0, (Byte)-1, 1, o_single, 0},
{"conv.u1", 0xd2, (Byte)-1, 1, o_single, 0},
{"conv.u2", 0xd1, (Byte)-1, 1, o_single, 0},
{"conv.u4", 0x6d, (Byte)-1, 1, o_single, 0},
{"conv.u8", 0x6e, (Byte)-1, 1, o_single, 0},
{"cpblk", 0xfe, 0x17, 2, o_single, -3},
{"cpobj", 0x70, (Byte)-1, 5, o_index4, -1},
{"div", 0x5b, (Byte)-1, 1, o_single, -1},
{"div.un", 0x5c, (Byte)-1, 1, o_single, -1},
{"dup", 0x25, (Byte)-1, 1, o_single, 1},
{"endfault", 0xdc, (Byte)-1, 1, o_single, 0},
{"endfilter", 0xfe, 0x17, 2, o_single, -1},
{"endfinally", 0xdc, (Byte)-1, 1, o_single, 0},
{"initblk", 0xfe, 0x18, 2, o_single, -3},
{"initobj", 0xfe, 0x15, 6, o_index4, -1},
{"isinst", 0x75, (Byte)-1, 5, o_index4, 0},
{"jmp", 0x27, (Byte)-1, 5, o_index4, 0},
{"ldarg", 0xfe, 0x09, 4, o_index2, 1},
{"ldarg.0", 0x02, (Byte)-1, 1, o_single, 1},
{"ldarg.1", 0x03, (Byte)-1, 1, o_single, 1},
{"ldarg.2", 0x04, (Byte)-1, 1, o_single, 1},
{"ldarg.3", 0x05, (Byte)-1, 1, o_single, 1},
{"ldarg.s", 0xe, (Byte)-1, 2, o_index1, 1},
{"ldarga", 0xfe, 0x0a, 4, o_index2, 1},
{"ldarga.s", 0x0f, (Byte)-1, 2, o_index1, 1},
{"ldc.i4", 0x20, (Byte)-1, 5, o_immed4, 1},
{"ldc.i4.0", 0x16, (Byte)-1, 1, o_single, 1},
{"ldc.i4.1", 0x17, (Byte)-1, 1, o_single, 1},
{"ldc.i4.2", 0x18, (Byte)-1, 1, o_single, 1},
{"ldc.i4.3", 0x19, (Byte)-1, 1, o_single, 1},
{"ldc.i4.4", 0x1a, (Byte)-1, 1, o_single, 1},
{"ldc.i4.5", 0x1b, (Byte)-1, 1, o_single, 1},
{"ldc.i4.6", 0x1c, (Byte)-1, 1, o_single, 1},
{"ldc.i4.7", 0x1d, (Byte)-1, 1, o_single, 1},
{"ldc.i4.8", 0x1e, (Byte)-1, 1, o_single, 1},
{"ldc.i4.m1", 0x15, (Byte)-1, 1, o_single, 1},
{"ldc.i4.M1", 0x15, (Byte)-1, 1, o_single, 1},
{"ldc.i4.s", 0x1f, (Byte)-1, 2, o_immed1, 1},
{"ldc.i8", 0x21, (Byte)-1, 9, o_immed8, 1},
{"ldc.r4", 0x22, (Byte)-1, 5, o_float4, 1},
{"ldc.r8", 0x23, (Byte)-1, 9, o_float8, 1},
{"ldelem", 0xa3, (Byte)-1, 5, o_index4, -1},
{"ldelem.i", 0x97, (Byte)-1, 1, o_single, -1},
{"ldelem.i1", 0x90, (Byte)-1, 1, o_single, -1},
{"ldelem.i2", 0x92, (Byte)-1, 1, o_single, -1},
{"ldelem.i4", 0x94, (Byte)-1, 1, o_single, -1},
{"ldelem.i8", 0x96, (Byte)-1, 1, o_single, -1},
{"ldelem.r4", 0x98, (Byte)-1, 1, o_single, -1},
{"ldelem.r8", 0x99, (Byte)-1, 1, o_single, -1},
{"ldelem.ref", 0x9a, (Byte)-1, 1, o_single, -1},
{"ldelem.u1", 0x91, (Byte)-1, 1, o_single, -1},
{"ldelem.u2", 0x93, (Byte)-1, 1, o_single, -1},
{"ldelem.u4", 0x95, (Byte)-1, 1, o_single, -1},
{"ldelem.u8", 0x96, (Byte)-1, 1, o_single, -1},
{"ldelema", 0x8f, (Byte)-1, 5, o_index4, -1},
{"ldfld", 0x7b, (Byte)-1, 5, o_index4, 0},
{"ldflda", 0x7c, (Byte)-1, 5, o_index4, 0},
{"ldftn", 0xfe, 0x06, 6, o_index4, 1},
{"ldind.i", 0x4d, (Byte)-1, 1, o_single, 0},
{"ldind.i1", 0x46, (Byte)-1, 1, o_single, 0},
{"ldind.i2", 0x48, (Byte)-1, 1, o_single, 0},
{"ldind.i4", 0x4a, (Byte)-1, 1, o_single, 0},
{"ldind.i8", 0x4c, (Byte)-1, 1, o_single, 0},
{"ldind.r4", 0x4e, (Byte)-1, 1, o_single, 0},
{"ldind.r8", 0x4f, (Byte)-1, 1, o_single, 0},
{"ldind.ref", 0x50, (Byte)-1, 1, o_single, 0},
{"ldind.u1", 0x47, (Byte)-1, 1, o_single, 0},
{"ldind.u2", 0x49, (Byte)-1, 1, o_single, 0},
{"ldind.u4", 0x4b, (Byte)-1, 1, o_single, 0},
{"ldind.u8", 0x4c, (Byte)-1, 1, o_single, 0},
{"ldlen", 0x8e, (Byte)-1, 1, o_single, 0},
{"ldloc", 0xfe, 0x0c, 4, o_index2, 1},
{"ldloc.0", 0x06, (Byte)-1, 1, o_single, 1},
{"ldloc.1", 0x07, (Byte)-1, 1, o_single, 1},
{"ldloc.2", 0x08, (Byte)-1, 1, o_single, 1},
{"ldloc.3", 0x09, (Byte)-1, 1, o_single, 1},
{"ldloc.s", 0x11, (Byte)-1, 2, o_index1, 1},
{"ldloca", 0xfe, 0x0d, 4, o_index2, 1},
{"ldloca.s", 0x12, (Byte)-1, 2, o_index1, 1},
{"ldnull", 0x14, (Byte)-1, 1, o_single, 1},
{"ldobj", 0x71, (Byte)-1, 5, o_index4, 0},
{"ldsfld", 0x7e, (Byte)-1, 5, o_index4, 1},
{"ldsflda", 0x7f, (Byte)-1, 5, o_index4, 1},
{"ldstr", 0x72, (Byte)-1, 5, o_index4, 1},
{"ldtoken", 0xd0, (Byte)-1, 5, o_index4, 1},
{"ldvirtftn", 0xfe, 0x07, 6, o_index4, 1},
{"leave", 0xdd, (Byte)-1, 5, o_rel4, 0}, // empty eval stack,
{"leave.s", 0xde, (Byte)-1, 2, o_rel1, 0}, // empty eval stack
{"localloc", 0xfe, 0x0f, 2, o_single, 0},
{"mkrefany", 0xc6, (Byte)-1, 5, o_index4, 0},
{"mul", 0x5a, (Byte)-1, 1, o_single, -1},
{"mul.ovf", 0xd8, (Byte)-1, 1, o_single, -1},
{"mul.ovf.un", 0xd9, (Byte)-1, 1, o_single, -1},
{"neg", 0x65, (Byte)-1, 1, o_single, 0},
{"newarr", 0x8d, (Byte)-1, 5, o_index4, 0},
{"newobj", 0x73, (Byte)-1, 5, o_index4, 1}, // - arg list
{"no.", 0xfe, 0x19, 3, o_immed1, 0},
{"nop", 0x00, (Byte)-1, 1, o_single, 0},
{"not", 0x66, (Byte)-1, 1, o_single, 0},
{"or", 0x60, (Byte)-1, 1, o_single, -1},
{"pop", 0x26, (Byte)-1, 1, o_single, -1},
{"readonly.", 0xfe, 0x1e, 2, o_single, 0},
{"refanytype", 0xfe, 0x1d, 2, o_single, 0},
{"refanyval", 0xc2, (Byte)-1, 5, o_index4, 0},
{"rem", 0x5d, (Byte)-1, 1, o_single, -1},
{"rem.un", 0x5e, (Byte)-1, 1, o_single, -1},
{"ret", 0x2a, (Byte)-1, 1, o_single, 0},
{"rethrow", 0xfe, 0x1a, 2, o_single, 0},
{"shl", 0x62, (Byte)-1, 1, o_single, -1},
{"shr", 0x63, (Byte)-1, 1, o_single, -1},
{"shr.un", 0x64, (Byte)-1, 1, o_single, -1},
{"sizeof", 0xfe, 0x1c, 6, o_index4, 1},
{"starg", 0xfe, 0x0b, 4, o_index2, -1},
{"starg.s", 0x10, (Byte)-1, 2, o_index1, -1},
{"stelem", 0xa4, (Byte)-1, 5, o_index4, -3},
{"stelem.i", 0x9b, (Byte)-1, 1, o_single, -3},
{"stelem.i1", 0x9c, (Byte)-1, 1, o_single, -3},
{"stelem.i2", 0x9d, (Byte)-1, 1, o_single, -3},
{"stelem.i4", 0x9e, (Byte)-1, 1, o_single, -3},
{"stelem.i8", 0x9f, (Byte)-1, 1, o_single, -3},
{"stelem.r4", 0xa0, (Byte)-1, 1, o_single, -3},
{"stelem.r8", 0xa1, (Byte)-1, 1, o_single, -3},
{"stelem.ref", 0xa2, (Byte)-1, 1, o_single, -3},
{"stfld", 0x7d, (Byte)-1, 5, o_index4, -2},
{"stind.i", 0xdf, (Byte)-1, 1, o_single, -2},
{"stind.i1", 0x52, (Byte)-1, 1, o_single, -2},
{"stind.i2", 0x53, (Byte)-1, 1, o_single, -2},
{"stind.i4", 0x54, (Byte)-1, 1, o_single, -2},
{"stind.i8", 0x55, (Byte)-1, 1, o_single, -2},
{"stind.r4", 0x56, (Byte)-1, 1, o_single, -2},
{"stind.r8", 0x57, (Byte)-1, 1, o_single, -2},
{"stind.ref", 0x51, (Byte)-1, 1, o_single, -2},
{"stloc", 0xfe, 0xe, 4, o_index2, -1},
{"stloc.0", 0x0a, (Byte)-1, 1, o_single, -1},
{"stloc.1", 0x0b, (Byte)-1, 1, o_single, -1},
{"stloc.2", 0x0c, (Byte)-1, 1, o_single, -1},
{"stloc.3", 0x0d, (Byte)-1, 1, o_single, -1},
{"stloc.s", 0x13, (Byte)-1, 2, o_index1, -1},
{"stobj", 0x81, (Byte)-1, 5, o_index4, -2},
{"stsfld", 0x80, (Byte)-1, 5, o_index4, -1},
{"sub", 0x59, (Byte)-1, 1, o_single, -1},
{"sub.ovf", 0xda, (Byte)-1, 1, o_single, -1},
{"sub.ovf.un", 0xdb, (Byte)-1, 1, o_single, -1},
{"switch", 0x45, (Byte)-1, 0, o_switch, -1},
{"tail.", 0xfe, 0x14, 2, o_single, 0},
{"throw", 0x7a, (Byte)-1, 1, o_single, 1},
{"unaligned.", 0xfe, 12, 3, o_single, 0},
{"unbox", 0x79, (Byte)-1, 5, o_index4, 0},
{"unbox.any", 0xa5, (Byte)-1, 5, o_index4, 0},
{"volatile.", 0xfe, 13, 2, o_single, 0},
{"xor", 0x61, (Byte)-1, 1, o_single, -1}};
Instruction::Instruction(iop Op, Operand* Oper) : op_(Op), switches_(nullptr), live_(false), offset_(0), sehType_(0), sehBegin_(0)
{
switches_ = new std::list<std::string>();
operand_ = Oper;
}
void Instruction::NullOperand(Allocator& allocator) { operand_ = allocator.AllocateOperand(); }
int Instruction::InstructionSize()
{
if (op_ == i_switch)
{
return 1 + 4 + (switches_ ? switches_->size() * 4 : 0);
}
else
{
return instructions_[op_].bytes;
}
}
int Instruction::StackUsage()
{
switch (op_)
{
case i_SEH:
if (sehBegin_ && (sehType_ == seh_filter || sehType_ == seh_filter_handler || sehType_ == seh_catch))
return 1; // for the object
return 0;
case i_leave:
case i_leave_s:
case i_endfinally:
case i_endfault:
return 0; // at this point the eval stack should be empty
case i_endfilter:
return -1; // after this pop the eval stack should be empty
case i_call:
case i_calli:
case i_callvirt:
case i_newobj: {
MethodSignature* sig = ((MethodName*)operand_->GetValue())->Signature();
int n = sig->ReturnType()->IsVoid() ? 0 : 1;
n -= sig->ParamCount() + sig->VarargParamCount();
if (op_ != i_newobj && (sig->Flags() & MethodSignature::InstanceFlag))
n--;
return n + instructions_[op_].stackUsage;
}
default:
return instructions_[op_].stackUsage;
}
}
void Instruction::AddCaseLabel(const std::string& label)
{
if (!switches_)
switches_ = new std::list<std::string>();
switches_->push_back(label);
}
bool Instruction::ILSrcDump(PELib& peLib) const
{
if (op_ == i_SEH)
{
if (sehBegin_)
{
switch (sehType_)
{
case seh_try:
peLib.Out() << ".try {" << std::endl;
break;
case seh_catch:
peLib.Out() << "catch ";
if (sehCatchType_)
sehCatchType_->ILSrcDump(peLib);
else
peLib.Out() << " [" + peLib.GetRuntimeName() + "]System.Object";
peLib.Out() << " {" << std::endl;
break;
case seh_filter:
peLib.Out() << "filter {" << std::endl;
break;
case seh_filter_handler:
peLib.Out() << "{" << std::endl;
break;
case seh_fault:
peLib.Out() << "fault {" << std::endl;
break;
case seh_finally:
peLib.Out() << "finally {" << std::endl;
break;
}
}
else
{
peLib.Out() << "}" << std::endl;
}
}
else if (op_ == i_label)
{
peLib.Out() << Label() << ":" << std::endl;
}
else if (op_ == i_comment)
{
peLib.Out() << "// " << Text() << std::endl;
}
else if (op_ == i_switch)
{
int i = 0;
peLib.Out() << "\tswitch (";
if (switches_)
{
for (auto it = switches_->begin(); it != switches_->end();)
{
peLib.Out() << (*it);
++it;
if (it != switches_->end())
{
peLib.Out() << ", ";
if (++i % 8 == 0)
peLib.Out() << "\n\t\t";
}
}
}
peLib.Out() << "\t)" << std::endl;
}
else
{
if (operand_)
{
peLib.Out() << "\t" << instructions_[op_].name << "\t";
operand_->ILSrcDump(peLib);
peLib.Out() << std::endl;
}
else
{
peLib.Out() << "\t" << instructions_[op_].name << std::endl;
}
}
return true;
}
void Instruction::ObjOut(PELib& peLib, int pass) const
{
peLib.Out() << std::endl << "$ib" << op_ << "," << offset_;
if (op_ == i_SEH)
{
peLib.Out() << "," << sehType_ << "," << sehBegin_;
if (sehCatchType_)
{
peLib.Out() << ",";
sehCatchType_->ObjOut(peLib, pass);
}
else
{
peLib.Out() << "@";
}
}
else if (op_ == i_label)
{
peLib.Out() << "," << peLib.FormatName(Label());
}
else if (op_ == i_comment)
{
peLib.Out() << "," << peLib.FormatName(Text());
}
else if (op_ == i_switch)
{
peLib.Out() << "," << switches_->size();
for (auto sw : *switches_)
{
peLib.Out() << "," << peLib.FormatName(sw);
}
}
else
{
if (operand_)
{
peLib.Out() << ",";
operand_->ObjOut(peLib, pass);
}
else
peLib.Out() << "$$";
{
}
}
peLib.Out() << std::endl << "$ie";
}
Instruction* Instruction::ObjIn(PELib& peLib, const std::map<const std::string, Local*>& locals)
{
Instruction* rv = nullptr;
iop op = (iop)peLib.ObjInt();
char ch;
ch = peLib.ObjChar();
if (ch != ',')
peLib.ObjError(oe_syntax);
int offset = peLib.ObjInt();
ch = peLib.ObjChar();
if (ch == ',')
{
switch (op)
{
int sehType;
bool sehBegin;
Type* sehCatchType;
case i_SEH:
sehType = peLib.ObjInt();
ch = peLib.ObjChar();
if (ch != ',')
peLib.ObjError(oe_syntax);
sehBegin = peLib.ObjInt();
ch = peLib.ObjChar();
if (ch == ',')
{
sehCatchType = Type::ObjIn(peLib);
}
else
{
sehCatchType = nullptr;
}
rv = peLib.AllocateInstruction((Instruction::iseh)sehType, sehBegin, sehCatchType);
break;
case i_label: {
std::string lbl = peLib.UnformatName();
rv = peLib.AllocateInstruction(op, peLib.AllocateOperand(lbl));
}
break;
case i_comment: {
std::string text = peLib.UnformatName();
rv = peLib.AllocateInstruction(op, text);
}
break;
case i_switch: {
rv = peLib.AllocateInstruction(op);
int n = peLib.ObjInt();
for (int i = 0; i < n; i++)
{
ch = peLib.ObjChar();
if (ch != ',')
peLib.ObjError(oe_syntax);
std::string text = peLib.UnformatName();
rv->AddCaseLabel(text);
}
}
break;
default: {
Operand* operand = Operand::ObjIn(peLib, locals);
rv = peLib.AllocateInstruction(op, operand);
}
break;
}
}
else
{
rv = peLib.AllocateInstruction(op);
if (ch == '$')
{
ch = peLib.ObjChar();
}
if (ch != '$')
peLib.ObjError(oe_syntax);
}
if (peLib.ObjEnd() != 'i')
peLib.ObjError(oe_syntax);
if (rv)
rv->Offset(offset);
return rv;
}
size_t Instruction::Render(PELib& peLib, Byte* result, std::unordered_map<std::string, Instruction*, StringHash>& labels)
{
int sz = 0;
if (op_ == i_SEH && sehType_ == seh_catch)
{
Byte data[4];
if (sehCatchType_)
sehCatchType_->Render(peLib, data);
}
if (op_ != i_label && op_ != i_comment && op_ != i_SEH)
{
result[sz++] = instructions_[op_].op1;
if (instructions_[op_].op2 != 0xff)
result[sz++] = instructions_[op_].op2;
if (op_ == i_switch)
{
*(DWord*)(result + sz) = switches_->size();
sz += sizeof(DWord);
int base = sz + offset_ + switches_->size() * sizeof(DWord);
for (auto it = switches_->begin(); it != switches_->end(); ++it)
{
int n = labels[*it]->offset_;
*(DWord*)(result + sz) = n - base;
sz += sizeof(DWord);
}
}
else if (IsBranch())
{
std::string branchLabel = operand_->StringValue();
int cur = offset_ + 1 + (IsRel4() ? 4 : 1); // calculate source
int n = labels[branchLabel]->offset_ - cur; // calculate offset to target
if (IsRel4())
{
*(int*)(result + sz) = n;
sz += 4;
}
else
{
*(Byte*)(result + sz) = n;
sz += 1;
}
}
else
{
if (operand_ && instructions_[op_].operandType != o_single)
{
sz += operand_->Render(peLib, op_, instructions_[op_].operandType, result + sz);
}
}
}
return sz;
}
} // namespace DotNetPELib