130 lines
4.0 KiB
C++
130 lines
4.0 KiB
C++
// This file is part of AsmJit project <https://asmjit.com>
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//
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// See asmjit.h or LICENSE.md for license and copyright information
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// SPDX-License-Identifier: Zlib
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#ifndef ASMJIT_CORE_ASSEMBLER_H_INCLUDED
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#define ASMJIT_CORE_ASSEMBLER_H_INCLUDED
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#include "../core/codeholder.h"
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#include "../core/emitter.h"
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#include "../core/operand.h"
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ASMJIT_BEGIN_NAMESPACE
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//! \addtogroup asmjit_assembler
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//! \{
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//! Base assembler.
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//!
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//! This is a base class that provides interface used by architecture specific
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//! assembler implementations. Assembler doesn't hold any data, instead it's
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//! attached to \ref CodeHolder, which provides all the data that Assembler
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//! needs and which can be altered by it.
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//!
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//! Check out architecture specific assemblers for more details and examples:
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//!
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//! - \ref x86::Assembler - X86/X64 assembler implementation.
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class ASMJIT_VIRTAPI BaseAssembler : public BaseEmitter {
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public:
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ASMJIT_NONCOPYABLE(BaseAssembler)
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typedef BaseEmitter Base;
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//! Current section where the assembling happens.
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Section* _section = nullptr;
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//! Start of the CodeBuffer of the current section.
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uint8_t* _bufferData = nullptr;
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//! End (first invalid byte) of the current section.
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uint8_t* _bufferEnd = nullptr;
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//! Pointer in the CodeBuffer of the current section.
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uint8_t* _bufferPtr = nullptr;
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//! \name Construction & Destruction
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//! \{
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//! Creates a new `BaseAssembler` instance.
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ASMJIT_API BaseAssembler() noexcept;
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//! Destroys the `BaseAssembler` instance.
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ASMJIT_API virtual ~BaseAssembler() noexcept;
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//! \}
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//! \name Code-Buffer Management
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//! \{
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//! Returns the capacity of the current CodeBuffer.
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inline size_t bufferCapacity() const noexcept { return (size_t)(_bufferEnd - _bufferData); }
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//! Returns the number of remaining bytes in the current CodeBuffer.
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inline size_t remainingSpace() const noexcept { return (size_t)(_bufferEnd - _bufferPtr); }
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//! Returns the current position in the CodeBuffer.
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inline size_t offset() const noexcept { return (size_t)(_bufferPtr - _bufferData); }
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//! Sets the current position in the CodeBuffer to `offset`.
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//!
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//! \note The `offset` cannot be greater than buffer size even if it's
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//! within the buffer's capacity.
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ASMJIT_API Error setOffset(size_t offset);
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//! Returns the start of the CodeBuffer in the current section.
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inline uint8_t* bufferData() const noexcept { return _bufferData; }
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//! Returns the end (first invalid byte) in the current section.
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inline uint8_t* bufferEnd() const noexcept { return _bufferEnd; }
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//! Returns the current pointer in the CodeBuffer in the current section.
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inline uint8_t* bufferPtr() const noexcept { return _bufferPtr; }
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//! \}
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//! \name Section Management
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//! \{
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//! Returns the current section.
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inline Section* currentSection() const noexcept { return _section; }
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ASMJIT_API Error section(Section* section) override;
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//! \}
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//! \name Label Management
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//! \{
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ASMJIT_API Label newLabel() override;
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ASMJIT_API Label newNamedLabel(const char* name, size_t nameSize = SIZE_MAX, LabelType type = LabelType::kGlobal, uint32_t parentId = Globals::kInvalidId) override;
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ASMJIT_API Error bind(const Label& label) override;
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//! \}
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//! \name Embed
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//! \{
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ASMJIT_API Error embed(const void* data, size_t dataSize) override;
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ASMJIT_API Error embedDataArray(TypeId typeId, const void* data, size_t itemCount, size_t repeatCount = 1) override;
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ASMJIT_API Error embedConstPool(const Label& label, const ConstPool& pool) override;
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ASMJIT_API Error embedLabel(const Label& label, size_t dataSize = 0) override;
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ASMJIT_API Error embedLabelDelta(const Label& label, const Label& base, size_t dataSize = 0) override;
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//! \}
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//! \name Comment
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//! \{
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ASMJIT_API Error comment(const char* data, size_t size = SIZE_MAX) override;
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//! \}
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//! \name Events
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//! \{
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ASMJIT_API Error onAttach(CodeHolder* code) noexcept override;
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ASMJIT_API Error onDetach(CodeHolder* code) noexcept override;
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//! \}
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};
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//! \}
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ASMJIT_END_NAMESPACE
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#endif // ASMJIT_CORE_ASSEMBLER_H_INCLUDED
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