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// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef RCC_MC_MCASMBACKEND_H
#define RCC_MC_MCASMBACKEND_H
#include "rcc/MC/MCFixup.h"
#include "rcc/MC/MCInst.h"
#include "rcc/Support/Error.h"
#include <cstdint>
#include <span>
#include <vector>
namespace rcc::mc {
struct MCFixupKindInfo final {
std::uint8_t StorageSize = 0;
bool PCRelative = false;
};
struct MCFixupRelocation final {
std::uint32_t Type = 0;
MCSymbolRef Symbol;
std::int64_t Addend = 0;
};
class MCAsmBackend {
public:
virtual ~MCAsmBackend() = default;
[[nodiscard]] virtual Expected<MCFixupKindInfo> fixupKindInfo(MCFixupKind Kind) const = 0;
[[nodiscard]] virtual Expected<void> applyFixup(MCFixupKind Kind, std::span<std::uint8_t> Data,
std::uint64_t Offset,
std::int64_t Value) const = 0;
[[nodiscard]] virtual Expected<std::uint32_t> relocationType(const MCFixup &Fixup,
const MCValue &Value) const = 0;
[[nodiscard]] virtual Expected<std::vector<MCFixupRelocation>>
relocationsForFixup(const MCFixup &Fixup, const MCValue &Value) const;
[[nodiscard]] virtual bool mayNeedRelaxation(const MCInst &) const noexcept {
return false;
}
[[nodiscard]] virtual Expected<bool> fixupNeedsRelaxation(const MCFixup &, std::int64_t) const {
return false;
}
[[nodiscard]] virtual Expected<MCInst> relaxInstruction(const MCInst &) const;
[[nodiscard]] virtual std::uint32_t objectFlags() const noexcept {
return 0;
}
};
} // namespace rcc::mc
#endif // RCC_MC_MCASMBACKEND_H
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