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/*
* Copyright (C) 2014-2020 Paul Cercueil <paul@crapouillou.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
#ifndef __DISASSEMBLER_H__
#define __DISASSEMBLER_H__
#include "debug.h"
#include "lightrec.h"
#ifndef __packed
#define __packed __attribute__((packed))
#endif
#define LIGHTREC_DIRECT_IO (1 << 0)
#define LIGHTREC_NO_INVALIDATE (1 << 1)
#define LIGHTREC_NO_DS (1 << 2)
#define LIGHTREC_SMC (1 << 3)
#define LIGHTREC_EMULATE_BRANCH (1 << 4)
#define LIGHTREC_LOCAL_BRANCH (1 << 5)
#define LIGHTREC_HW_IO (1 << 6)
#define LIGHTREC_MULT32 (1 << 7)
struct block;
enum standard_opcodes {
OP_SPECIAL = 0x00,
OP_REGIMM = 0x01,
OP_J = 0x02,
OP_JAL = 0x03,
OP_BEQ = 0x04,
OP_BNE = 0x05,
OP_BLEZ = 0x06,
OP_BGTZ = 0x07,
OP_ADDI = 0x08,
OP_ADDIU = 0x09,
OP_SLTI = 0x0a,
OP_SLTIU = 0x0b,
OP_ANDI = 0x0c,
OP_ORI = 0x0d,
OP_XORI = 0x0e,
OP_LUI = 0x0f,
OP_CP0 = 0x10,
OP_CP2 = 0x12,
OP_LB = 0x20,
OP_LH = 0x21,
OP_LWL = 0x22,
OP_LW = 0x23,
OP_LBU = 0x24,
OP_LHU = 0x25,
OP_LWR = 0x26,
OP_SB = 0x28,
OP_SH = 0x29,
OP_SWL = 0x2a,
OP_SW = 0x2b,
OP_SWR = 0x2e,
OP_LWC2 = 0x32,
OP_SWC2 = 0x3a,
OP_META_REG_UNLOAD = 0x11,
OP_META_BEQZ = 0x14,
OP_META_BNEZ = 0x15,
OP_META_MOV = 0x16,
OP_META_SYNC = 0x17,
};
enum special_opcodes {
OP_SPECIAL_SLL = 0x00,
OP_SPECIAL_SRL = 0x02,
OP_SPECIAL_SRA = 0x03,
OP_SPECIAL_SLLV = 0x04,
OP_SPECIAL_SRLV = 0x06,
OP_SPECIAL_SRAV = 0x07,
OP_SPECIAL_JR = 0x08,
OP_SPECIAL_JALR = 0x09,
OP_SPECIAL_SYSCALL = 0x0c,
OP_SPECIAL_BREAK = 0x0d,
OP_SPECIAL_MFHI = 0x10,
OP_SPECIAL_MTHI = 0x11,
OP_SPECIAL_MFLO = 0x12,
OP_SPECIAL_MTLO = 0x13,
OP_SPECIAL_MULT = 0x18,
OP_SPECIAL_MULTU = 0x19,
OP_SPECIAL_DIV = 0x1a,
OP_SPECIAL_DIVU = 0x1b,
OP_SPECIAL_ADD = 0x20,
OP_SPECIAL_ADDU = 0x21,
OP_SPECIAL_SUB = 0x22,
OP_SPECIAL_SUBU = 0x23,
OP_SPECIAL_AND = 0x24,
OP_SPECIAL_OR = 0x25,
OP_SPECIAL_XOR = 0x26,
OP_SPECIAL_NOR = 0x27,
OP_SPECIAL_SLT = 0x2a,
OP_SPECIAL_SLTU = 0x2b,
};
enum regimm_opcodes {
OP_REGIMM_BLTZ = 0x00,
OP_REGIMM_BGEZ = 0x01,
OP_REGIMM_BLTZAL = 0x10,
OP_REGIMM_BGEZAL = 0x11,
};
enum cp0_opcodes {
OP_CP0_MFC0 = 0x00,
OP_CP0_CFC0 = 0x02,
OP_CP0_MTC0 = 0x04,
OP_CP0_CTC0 = 0x06,
OP_CP0_RFE = 0x10,
};
enum cp2_opcodes {
OP_CP2_BASIC = 0x00,
};
enum cp2_basic_opcodes {
OP_CP2_BASIC_MFC2 = 0x00,
OP_CP2_BASIC_CFC2 = 0x02,
OP_CP2_BASIC_MTC2 = 0x04,
OP_CP2_BASIC_CTC2 = 0x06,
};
struct opcode_r {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
u32 zero :6;
u32 rs :5;
u32 rt :5;
u32 rd :5;
u32 imm :5;
u32 op :6;
#else
u32 op :6;
u32 imm :5;
u32 rd :5;
u32 rt :5;
u32 rs :5;
u32 zero :6;
#endif
} __packed;
struct opcode_i {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
u32 op :6;
u32 rs :5;
u32 rt :5;
u32 imm :16;
#else
u32 imm :16;
u32 rt :5;
u32 rs :5;
u32 op :6;
#endif
} __packed;
struct opcode_j {
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
u32 op :6;
u32 imm :26;
#else
u32 imm :26;
u32 op :6;
#endif
} __packed;
union code {
/* Keep in sync with struct opcode */
u32 opcode;
struct opcode_r r;
struct opcode_i i;
struct opcode_j j;
};
struct opcode {
/* Keep this union at the first position */
union {
union code c;
/* Keep in sync with union code */
u32 opcode;
struct opcode_r r;
struct opcode_i i;
struct opcode_j j;
};
u16 flags;
u16 offset;
struct opcode *next;
};
struct opcode * lightrec_disassemble(struct lightrec_state *state,
const u32 *src, unsigned int *len);
void lightrec_free_opcode_list(struct lightrec_state *state,
struct opcode *list);
unsigned int lightrec_cycles_of_opcode(union code code);
void lightrec_print_disassembly(const struct block *block,
const u32 *code, unsigned int length);
#endif /* __DISASSEMBLER_H__ */
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