Initial Commit

thirdparty/capstone/arch/Alpha/AlphaDisassembler.c

@@ -0,0 +1,113 @@
+/* Capstone Disassembly Engine */
+/* By Dmitry Sibirtsev  <sibirtsevdl@gmail.com>, 2023 */
+
+#ifdef CAPSTONE_HAS_ALPHA
+
+#include <stdio.h> // DEBUG
+#include <stdlib.h>
+#include <string.h>
+
+#include "../../utils.h"
+
+#include "../../MCFixedLenDisassembler.h"
+#include "../../Mapping.h"
+
+#include "AlphaDisassembler.h"
+#include "AlphaLinkage.h"
+
+static DecodeStatus DecodeGPRCRegisterClass(MCInst *Inst, unsigned RegNo,
+											uint64_t Address,
+											const void *Decoder);
+
+static DecodeStatus DecodeF4RCRegisterClass(MCInst *Inst, unsigned RegNo,
+											uint64_t Address,
+											const void *Decoder);
+
+static DecodeStatus DecodeF8RCRegisterClass(MCInst *Inst, unsigned RegNo,
+											uint64_t Address,
+											const void *Decoder);
+
+#include "AlphaGenDisassemblerTables.inc"
+
+#define GET_REGINFO_ENUM
+#define GET_REGINFO_MC_DESC
+
+#include "AlphaGenRegisterInfo.inc"
+
+static DecodeStatus DecodeGPRCRegisterClass(MCInst *Inst, unsigned RegNo,
+											uint64_t Address,
+											const void *Decoder)
+{
+	if (RegNo > 31)
+		return MCDisassembler_Fail;
+
+	unsigned Register = GPRC[RegNo];
+	MCOperand_CreateReg0(Inst, (Register));
+	return MCDisassembler_Success;
+}
+
+static DecodeStatus DecodeF4RCRegisterClass(MCInst *Inst, unsigned RegNo,
+											uint64_t Address,
+											const void *Decoder)
+{
+	if (RegNo > 31)
+		return MCDisassembler_Fail;
+
+	unsigned Register = F4RC[RegNo];
+	MCOperand_CreateReg0(Inst, (Register));
+	return MCDisassembler_Success;
+}
+
+static DecodeStatus DecodeF8RCRegisterClass(MCInst *Inst, unsigned RegNo,
+											uint64_t Address,
+											const void *Decoder)
+{
+	if (RegNo > 31)
+		return MCDisassembler_Fail;
+
+	unsigned Register = F8RC[RegNo];
+	MCOperand_CreateReg0(Inst, (Register));
+	return MCDisassembler_Success;
+}
+
+#define GET_SUBTARGETINFO_ENUM
+
+#include "AlphaGenInstrInfo.inc"
+
+DecodeStatus Alpha_LLVM_getInstruction(csh handle, const uint8_t *Bytes,
+									   size_t ByteLen, MCInst *MI,
+									   uint16_t *Size, uint64_t Address,
+									   void *Info)
+{
+	if (!handle) {
+		return MCDisassembler_Fail;
+	}
+
+	if (ByteLen < 4) {
+		*Size = 0;
+		return MCDisassembler_Fail;
+	}
+
+	uint32_t Insn = readBytes32(MI, Bytes);
+	// Calling the auto-generated decoder function.
+	DecodeStatus Result =
+		decodeInstruction_4(DecoderTable32, MI, Insn, Address, NULL);
+
+	if (Result != MCDisassembler_Fail) {
+		*Size = 4;
+		return Result;
+	}
+
+	*Size = 4;
+	return MCDisassembler_Fail;
+}
+
+void Alpha_init(MCRegisterInfo *MRI)
+{
+	MCRegisterInfo_InitMCRegisterInfo(
+		MRI, AlphaRegDesc, ARR_SIZE(AlphaRegDesc), 0, 0, AlphaMCRegisterClasses,
+		ARR_SIZE(AlphaMCRegisterClasses), 0, 0, AlphaRegDiffLists, 0,
+		AlphaSubRegIdxLists, 1, 0);
+}
+
+#endif