[MC] Implement RV64GC object emission

1 files changed, 79 insertions, 0 deletions

diff --git a/backend/include/rcc/MC/MCObjectWriter.h b/backend/include/rcc/MC/MCObjectWriter.h
new file mode 100644
index 0000000..16c6a50
--- /dev/null
+++ b/backend/include/rcc/MC/MCObjectWriter.h
@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef RCC_MC_MCOBJECTWRITER_H
+#define RCC_MC_MCOBJECTWRITER_H
+
+#include "rcc/MC/MCSection.h"
+#include "rcc/MC/MCSymbol.h"
+#include "rcc/Support/Error.h"
+
+#include <cstddef>
+#include <cstdint>
+#include <optional>
+#include <vector>
+
+namespace rcc::mc {
+
+enum class MCObjectSymbolBinding : std::uint8_t {
+  Local,
+  Global,
+  Weak,
+};
+
+enum class MCObjectSymbolType : std::uint8_t {
+  None,
+  Function,
+  Object,
+  TLSObject,
+  Section,
+};
+
+enum class MCObjectSymbolVisibility : std::uint8_t {
+  Default,
+  Hidden,
+  Protected,
+};
+
+struct MCObjectRelocation final {
+  std::uint64_t Offset = 0;
+  std::uint32_t Type = 0;
+  MCSymbolRef Symbol;
+  std::int64_t Addend = 0;
+};
+
+struct MCObjectSection final {
+  MCSectionRef Section;
+  std::vector<std::uint8_t> Contents;
+  std::uint64_t AddressSize = 0;
+  std::uint64_t Alignment = 1;
+  std::vector<MCObjectRelocation> Relocations;
+};
+
+struct MCObjectSymbol final {
+  MCSymbolRef Symbol;
+  MCObjectSymbolBinding Binding = MCObjectSymbolBinding::Local;
+  MCObjectSymbolType Type = MCObjectSymbolType::None;
+  MCObjectSymbolVisibility Visibility = MCObjectSymbolVisibility::Default;
+  std::optional<std::size_t> SectionIndex;
+  std::uint64_t Value = 0;
+  std::uint64_t Size = 0;
+  std::uint64_t CommonAlignment = 0;
+};
+
+struct MCAssembledObject final {
+  std::vector<MCObjectSection> Sections;
+  std::vector<MCObjectSymbol> Symbols;
+  std::uint32_t Flags = 0;
+};
+
+class MCObjectWriter {
+public:
+  virtual ~MCObjectWriter() = default;
+
+  [[nodiscard]] virtual Expected<std::vector<std::uint8_t>>
+  writeObject(const MCAssembledObject &Object) const = 0;
+};
+
+} // namespace rcc::mc
+
+#endif // RCC_MC_MCOBJECTWRITER_H