[MC] Implement RV64GC object emission

1 files changed, 44 insertions, 0 deletions

diff --git a/backend/include/rcc/MC/MCDwarfFrameEmitter.h b/backend/include/rcc/MC/MCDwarfFrameEmitter.h
new file mode 100644
index 0000000..f338f36
--- /dev/null
+++ b/backend/include/rcc/MC/MCDwarfFrameEmitter.h
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef RCC_MC_MCDWARFFRAMEEMITTER_H
+#define RCC_MC_MCDWARFFRAMEEMITTER_H
+
+#include "rcc/MC/MCAsmBackend.h"
+#include "rcc/MC/MCCFI.h"
+#include "rcc/MC/MCObjectWriter.h"
+#include "rcc/Support/Error.h"
+
+#include <cstdint>
+#include <span>
+#include <vector>
+
+namespace rcc::mc {
+
+struct MCDwarfFrameInfo final {
+  std::uint64_t CodeAlignment = 1;
+  std::int64_t DataAlignment = -8;
+  std::uint32_t ReturnAddressRegister = 0;
+  std::uint32_t InitialCFARegister = 0;
+  std::uint64_t InitialCFAOffset = 0;
+
+  [[nodiscard]] Expected<void> verify() const;
+};
+
+struct MCDwarfFrameInstruction final {
+  MCCFIInstruction Instruction;
+  std::uint64_t Offset = 0;
+};
+
+struct MCDwarfFrameProcedure final {
+  MCSymbolRef Function;
+  std::uint64_t AddressRange = 0;
+  std::vector<MCDwarfFrameInstruction> Instructions;
+};
+
+[[nodiscard]] Expected<MCObjectSection>
+emitDwarfEHFrame(MCSectionRef Section, std::span<const MCDwarfFrameProcedure> Procedures,
+                 const MCDwarfFrameInfo &Info, const MCAsmBackend &Backend);
+
+} // namespace rcc::mc
+
+#endif // RCC_MC_MCDWARFFRAMEEMITTER_H