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// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef RCC_MC_MCSECTION_H
#define RCC_MC_MCSECTION_H
#include "rcc/MC/MCSymbol.h"
#include "rcc/Support/Error.h"
#include <cstdint>
#include <initializer_list>
#include <memory>
#include <optional>
#include <string>
#include <string_view>
namespace rcc::mc {
enum class MCSectionKind : std::uint8_t {
Text,
ReadOnly,
Data,
BSS,
TLSData,
TLSBSS,
EHFrame,
Custom,
};
enum class MCSectionFlag : std::uint8_t {
Alloc,
Executable,
Writable,
Merge,
Strings,
TLS,
Group,
Retain,
Count,
};
class MCSectionFlags final {
public:
constexpr MCSectionFlags() noexcept = default;
constexpr MCSectionFlags(std::initializer_list<MCSectionFlag> Flags) noexcept {
for (const MCSectionFlag Flag : Flags)
set(Flag);
}
constexpr void set(MCSectionFlag Flag) noexcept {
const auto Index = static_cast<std::uint8_t>(Flag);
if (Index < static_cast<std::uint8_t>(MCSectionFlag::Count))
Mask |= std::uint16_t{1} << Index;
}
[[nodiscard]] constexpr bool has(MCSectionFlag Flag) const noexcept {
const auto Index = static_cast<std::uint8_t>(Flag);
return Index < static_cast<std::uint8_t>(MCSectionFlag::Count) &&
(Mask & (std::uint16_t{1} << Index)) != 0;
}
[[nodiscard]] constexpr std::uint16_t rawValue() const noexcept {
return Mask;
}
friend constexpr bool operator==(MCSectionFlags Left, MCSectionFlags Right) noexcept = default;
private:
std::uint16_t Mask = 0;
};
struct MCSectionDesc final {
std::string Name;
MCSectionKind Kind = MCSectionKind::Custom;
MCSectionFlags Flags;
std::uint64_t Alignment = 1;
std::uint64_t EntrySize = 0;
MCSymbolRef Group;
std::optional<std::uint64_t> UniqueID;
[[nodiscard]] Expected<void> verify() const;
friend bool operator==(const MCSectionDesc &Left, const MCSectionDesc &Right) = default;
};
class MCSection final {
public:
[[nodiscard]] std::string_view name() const noexcept {
return Description.Name;
}
[[nodiscard]] const MCSectionDesc &description() const noexcept {
return Description;
}
private:
explicit MCSection(MCSectionDesc Description) : Description(std::move(Description)) {}
MCSectionDesc Description;
friend class MCContext;
};
using MCSectionRef = std::shared_ptr<const MCSection>;
} // namespace rcc::mc
#endif // RCC_MC_MCSECTION_H
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