mirror of
https://github.com/revng/revng
synced 2026-06-21 14:07:57 +00:00
Alessandro Di Federico
f8dcd566ae
Instead of taking note of the executable ranges exclusively, keep track of all the segments in `CodeGenerator`. `JumpTargetManager` instead will keep track of executable areas only. * Introduce the `SegmentInfo` struct, which simply holds essential information about the segment such as start and end address, permissions and a reference to the global variable holding its content. * Update `CodeGenerator` to keep a vector of `SegmentInfo`. * `JumpTargetManager`: polish the constructor and make it take the vector of `SegmentInfo`, from which the executable ranges are then extracted.
91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
#ifndef _CODEGENERATOR_H
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#define _CODEGENERATOR_H
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// Standard includes
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#include <cstdint>
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#include <string>
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#include <memory>
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// LLVM includes
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#include "llvm/ADT/ArrayRef.h"
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// Local includes
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#include "revamb.h"
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// Forward declarations
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namespace llvm {
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class LLVMContext;
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class Function;
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class GlobalVariable;
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class Module;
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class Value;
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class StructType;
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class DataLayout;
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namespace object {
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class ObjectFile;
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};
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};
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class DebugHelper;
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/// Translates code from an architecture to LLVM IR.
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class CodeGenerator {
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public:
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/// Create a new code generator translating code from an architecture to
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/// another, writing the corresponding LLVM IR and debug source file of the
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/// requested type to file.
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///
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/// \param Source source architecture.
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/// \param Target target architecture.
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/// \param OutputPath path where the generate LLVM IR must be saved.
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/// \param HelpersPath path of the LLVM IR file containing the QEMU helpers.
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/// \param DebugInfo type of debug information to generate.
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/// \param DebugPath path where the debugging source file must be written.
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CodeGenerator(std::string Input,
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Architecture& Target,
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std::string Output,
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std::string Helpers,
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DebugInfoType DebugInfo,
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std::string Debug,
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std::string LinkingInfoPath);
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~CodeGenerator();
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/// \brief Creates an LLVM function for the code in the specified memory area.
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/// If debug information have been requested, the debug source files will be
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/// create in this phase.
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///
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/// \param Name the name to give to the newly created function.
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/// \param Code reference to memory area containing the code to translate.
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void translate(uint64_t VirtualAddress,
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std::string Name);
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/// Serialize the generated LLVM IR to the specified output path.
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void serialize();
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private:
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template<typename T>
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void parseELF(llvm::object::ObjectFile *TheBinary,
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std::string LinkingInfoPath);
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private:
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Architecture SourceArchitecture;
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Architecture TargetArchitecture;
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llvm::LLVMContext& Context;
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std::unique_ptr<llvm::Module> TheModule;
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std::unique_ptr<llvm::Module> HelpersModule;
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std::string OutputPath;
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std::unique_ptr<DebugHelper> Debug;
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llvm::object::OwningBinary<llvm::object::Binary> BinaryHandle;
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std::vector<SegmentInfo> Segments;
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uint64_t EntryPoint;
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unsigned OriginalInstrMDKind;
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unsigned PTCInstrMDKind;
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unsigned DbgMDKind;
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};
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#endif // _CODEGENERATOR_H
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