From 379ff50dcc7ccf977379aee68fa9d10f69065d23 Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Sun, 9 Aug 2026 18:31:49 +0800
Subject: [MC] Implement RV64GC assembly emission

---
 backend/include/rcc/MC/MCSection.h | 108 +++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 backend/include/rcc/MC/MCSection.h

(limited to 'backend/include/rcc/MC/MCSection.h')

diff --git a/backend/include/rcc/MC/MCSection.h b/backend/include/rcc/MC/MCSection.h
new file mode 100644
index 0000000..4f76427
--- /dev/null
+++ b/backend/include/rcc/MC/MCSection.h
@@ -0,0 +1,108 @@
+// 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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