vmdevirt/include/vmp_rtn.hpp

#pragma once
#include <vmprofiler.hpp>

#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/IRPrintingPasses.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/IR/Mangler.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/Verifier.h"

#include "llvm/Transforms/InstCombine/InstCombine.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Scalar/GVN.h"

#include "X86TargetMachine.h"
#include "llvm/Pass.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"

namespace llvm
{
    extern "C" void LLVMInitializeX86TargetInfo();
    extern "C" void LLVMInitializeX86Target();
    extern "C" void LLVMInitializeX86TargetMC();
    extern "C" void LLVMInitializeX86AsmParser();
    extern "C" void LLVMInitializeX86AsmPrinter();
} // namespace llvm

namespace vm
{
    class vmp_rtn_t
    {
        friend class lifters_t;

      public:
        explicit vmp_rtn_t( llvm::LLVMContext *llvm_ctx, llvm::Module *llvm_module, vm::ctx_t *vm_ctx,
                            std::uintptr_t rtn_begin, std::vector< vm::instrs::code_block_t > vmp2_code_blocks );

        llvm::Function *lift( void );

      private:
        llvm::LLVMContext *llvm_ctx;
        llvm::Module *llvm_module;
        llvm::Function *llvm_fptr;
        llvm::AllocaInst *flags, *stack;

        vm::ctx_t *vm_ctx;
        std::uintptr_t rtn_begin;
        std::shared_ptr< llvm::IRBuilder<> > ir_builder;

        std::vector< llvm::AllocaInst * > virtual_registers;
        std::vector< std::pair< std::uintptr_t, llvm::BasicBlock * > > llvm_code_blocks;
        std::vector< vm::instrs::code_block_t > vmp2_code_blocks;

        void push( std::uint8_t byte_size, llvm::Value *input_val );
        llvm::Value *pop( std::uint8_t byte_size );

        llvm::Value *load_value( std::uint8_t byte_size, llvm::GlobalValue *global );
        llvm::Value *load_value( std::uint8_t byte_size, llvm::AllocaInst *var );

        llvm::Value *compute_sf( std::uint8_t byte_size, llvm::Value *val );
        llvm::Value *compute_zf( std::uint8_t byte_size, llvm::Value *val );
        llvm::Value *compute_pf( std::uint8_t byte_size, llvm::Value *val );
        llvm::Value *combine_flags( llvm::Value *cf, llvm::Value *pf, llvm::Value *af, llvm::Value *zf, llvm::Value *sf,
                                    llvm::Value *of );

        void create_virtual_registers( void );
        void create_routine( void );
    };
} // namespace vm