| /* |
| * Simple LatticeMico32 disassembler. |
| * |
| * Copyright (c) 2012 Michael Walle <michael@walle.cc> |
| * |
| * 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 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. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include <stdio.h> |
| #include "disas/bfd.h" |
| |
| typedef enum { |
| LM32_OP_SRUI = 0, LM32_OP_NORI, LM32_OP_MULI, LM32_OP_SH, LM32_OP_LB, |
| LM32_OP_SRI, LM32_OP_XORI, LM32_OP_LH, LM32_OP_ANDI, LM32_OP_XNORI, |
| LM32_OP_LW, LM32_OP_LHU, LM32_OP_SB, LM32_OP_ADDI, LM32_OP_ORI, |
| LM32_OP_SLI, LM32_OP_LBU, LM32_OP_BE, LM32_OP_BG, LM32_OP_BGE, |
| LM32_OP_BGEU, LM32_OP_BGU, LM32_OP_SW, LM32_OP_BNE, LM32_OP_ANDHI, |
| LM32_OP_CMPEI, LM32_OP_CMPGI, LM32_OP_CMPGEI, LM32_OP_CMPGEUI, |
| LM32_OP_CMPGUI, LM32_OP_ORHI, LM32_OP_CMPNEI, LM32_OP_SRU, LM32_OP_NOR, |
| LM32_OP_MUL, LM32_OP_DIVU, LM32_OP_RCSR, LM32_OP_SR, LM32_OP_XOR, |
| LM32_OP_ILL0, LM32_OP_AND, LM32_OP_XNOR, LM32_OP_ILL1, LM32_OP_SCALL, |
| LM32_OP_SEXTB, LM32_OP_ADD, LM32_OP_OR, LM32_OP_SL, LM32_OP_B, |
| LM32_OP_MODU, LM32_OP_SUB, LM32_OP_ILL2, LM32_OP_WCSR, LM32_OP_ILL3, |
| LM32_OP_CALL, LM32_OP_SEXTH, LM32_OP_BI, LM32_OP_CMPE, LM32_OP_CMPG, |
| LM32_OP_CMPGE, LM32_OP_CMPGEU, LM32_OP_CMPGU, LM32_OP_CALLI, LM32_OP_CMPNE, |
| } Lm32Opcode; |
| |
| typedef enum { |
| FMT_INVALID = 0, FMT_RRI5, FMT_RRI16, FMT_IMM26, FMT_LOAD, FMT_STORE, |
| FMT_RRR, FMT_R, FMT_RNR, FMT_CRN, FMT_CNR, FMT_BREAK, |
| } Lm32OpcodeFmt; |
| |
| typedef enum { |
| LM32_CSR_IE = 0, LM32_CSR_IM, LM32_CSR_IP, LM32_CSR_ICC, LM32_CSR_DCC, |
| LM32_CSR_CC, LM32_CSR_CFG, LM32_CSR_EBA, LM32_CSR_DC, LM32_CSR_DEBA, |
| LM32_CSR_CFG2, LM32_CSR_JTX = 0xe, LM32_CSR_JRX, LM32_CSR_BP0, |
| LM32_CSR_BP1, LM32_CSR_BP2, LM32_CSR_BP3, LM32_CSR_WP0 = 0x18, |
| LM32_CSR_WP1, LM32_CSR_WP2, LM32_CSR_WP3, |
| } Lm32CsrNum; |
| |
| typedef struct { |
| int csr; |
| const char *name; |
| } Lm32CsrInfo; |
| |
| static const Lm32CsrInfo lm32_csr_info[] = { |
| {LM32_CSR_IE, "ie", }, |
| {LM32_CSR_IM, "im", }, |
| {LM32_CSR_IP, "ip", }, |
| {LM32_CSR_ICC, "icc", }, |
| {LM32_CSR_DCC, "dcc", }, |
| {LM32_CSR_CC, "cc", }, |
| {LM32_CSR_CFG, "cfg", }, |
| {LM32_CSR_EBA, "eba", }, |
| {LM32_CSR_DC, "dc", }, |
| {LM32_CSR_DEBA, "deba", }, |
| {LM32_CSR_CFG2, "cfg2", }, |
| {LM32_CSR_JTX, "jtx", }, |
| {LM32_CSR_JRX, "jrx", }, |
| {LM32_CSR_BP0, "bp0", }, |
| {LM32_CSR_BP1, "bp1", }, |
| {LM32_CSR_BP2, "bp2", }, |
| {LM32_CSR_BP3, "bp3", }, |
| {LM32_CSR_WP0, "wp0", }, |
| {LM32_CSR_WP1, "wp1", }, |
| {LM32_CSR_WP2, "wp2", }, |
| {LM32_CSR_WP3, "wp3", }, |
| }; |
| |
| static const Lm32CsrInfo *find_csr_info(int csr) |
| { |
| const Lm32CsrInfo *info; |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(lm32_csr_info); i++) { |
| info = &lm32_csr_info[i]; |
| if (csr == info->csr) { |
| return info; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| typedef struct { |
| int reg; |
| const char *name; |
| } Lm32RegInfo; |
| |
| typedef enum { |
| LM32_REG_R0 = 0, LM32_REG_R1, LM32_REG_R2, LM32_REG_R3, LM32_REG_R4, |
| LM32_REG_R5, LM32_REG_R6, LM32_REG_R7, LM32_REG_R8, LM32_REG_R9, |
| LM32_REG_R10, LM32_REG_R11, LM32_REG_R12, LM32_REG_R13, LM32_REG_R14, |
| LM32_REG_R15, LM32_REG_R16, LM32_REG_R17, LM32_REG_R18, LM32_REG_R19, |
| LM32_REG_R20, LM32_REG_R21, LM32_REG_R22, LM32_REG_R23, LM32_REG_R24, |
| LM32_REG_R25, LM32_REG_GP, LM32_REG_FP, LM32_REG_SP, LM32_REG_RA, |
| LM32_REG_EA, LM32_REG_BA, |
| } Lm32RegNum; |
| |
| static const Lm32RegInfo lm32_reg_info[] = { |
| {LM32_REG_R0, "r0", }, |
| {LM32_REG_R1, "r1", }, |
| {LM32_REG_R2, "r2", }, |
| {LM32_REG_R3, "r3", }, |
| {LM32_REG_R4, "r4", }, |
| {LM32_REG_R5, "r5", }, |
| {LM32_REG_R6, "r6", }, |
| {LM32_REG_R7, "r7", }, |
| {LM32_REG_R8, "r8", }, |
| {LM32_REG_R9, "r9", }, |
| {LM32_REG_R10, "r10", }, |
| {LM32_REG_R11, "r11", }, |
| {LM32_REG_R12, "r12", }, |
| {LM32_REG_R13, "r13", }, |
| {LM32_REG_R14, "r14", }, |
| {LM32_REG_R15, "r15", }, |
| {LM32_REG_R16, "r16", }, |
| {LM32_REG_R17, "r17", }, |
| {LM32_REG_R18, "r18", }, |
| {LM32_REG_R19, "r19", }, |
| {LM32_REG_R20, "r20", }, |
| {LM32_REG_R21, "r21", }, |
| {LM32_REG_R22, "r22", }, |
| {LM32_REG_R23, "r23", }, |
| {LM32_REG_R24, "r24", }, |
| {LM32_REG_R25, "r25", }, |
| {LM32_REG_GP, "gp", }, |
| {LM32_REG_FP, "fp", }, |
| {LM32_REG_SP, "sp", }, |
| {LM32_REG_RA, "ra", }, |
| {LM32_REG_EA, "ea", }, |
| {LM32_REG_BA, "ba", }, |
| }; |
| |
| static const Lm32RegInfo *find_reg_info(int reg) |
| { |
| assert(ARRAY_SIZE(lm32_reg_info) == 32); |
| return &lm32_reg_info[reg & 0x1f]; |
| } |
| |
| typedef struct { |
| struct { |
| uint32_t code; |
| uint32_t mask; |
| } op; |
| const char *name; |
| const char *args_fmt; |
| } Lm32OpcodeInfo; |
| |
| static const Lm32OpcodeInfo lm32_opcode_info[] = { |
| /* pseudo instructions */ |
| {{0x34000000, 0xffffffff}, "nop", NULL}, |
| {{0xac000002, 0xffffffff}, "break", NULL}, |
| {{0xac000003, 0xffffffff}, "scall", NULL}, |
| {{0xc3e00000, 0xffffffff}, "bret", NULL}, |
| {{0xc3c00000, 0xffffffff}, "eret", NULL}, |
| {{0xc3a00000, 0xffffffff}, "ret", NULL}, |
| {{0xa4000000, 0xfc1f07ff}, "not", "%2, %0"}, |
| {{0xb8000000, 0xfc1f07ff}, "mv", "%2, %0"}, |
| {{0x71e00000, 0xffe00000}, "mvhi", "%1, %u"}, |
| {{0x34000000, 0xffe00000}, "mvi", "%1, %s"}, |
| |
| #define _O(op) {op << 26, 0x3f << 26} |
| /* regular opcodes */ |
| {_O(LM32_OP_ADD), "add", "%2, %0, %1" }, |
| {_O(LM32_OP_ADDI), "addi", "%1, %0, %s" }, |
| {_O(LM32_OP_AND), "and", "%2, %0, %1" }, |
| {_O(LM32_OP_ANDHI), "andhi", "%1, %0, %u" }, |
| {_O(LM32_OP_ANDI), "andi", "%1, %0, %u" }, |
| {_O(LM32_OP_B), "b", "%0", }, |
| {_O(LM32_OP_BE), "be", "%1, %0, %r" }, |
| {_O(LM32_OP_BG), "bg", "%1, %0, %r" }, |
| {_O(LM32_OP_BGE), "bge", "%1, %0, %r" }, |
| {_O(LM32_OP_BGEU), "bgeu", "%1, %0, %r" }, |
| {_O(LM32_OP_BGU), "bgu", "%1, %0, %r" }, |
| {_O(LM32_OP_BI), "bi", "%R", }, |
| {_O(LM32_OP_BNE), "bne", "%1, %0, %r" }, |
| {_O(LM32_OP_CALL), "call", "%0", }, |
| {_O(LM32_OP_CALLI), "calli", "%R", }, |
| {_O(LM32_OP_CMPE), "cmpe", "%2, %0, %1" }, |
| {_O(LM32_OP_CMPEI), "cmpei", "%1, %0, %s" }, |
| {_O(LM32_OP_CMPG), "cmpg", "%2, %0, %1" }, |
| {_O(LM32_OP_CMPGE), "cmpge", "%2, %0, %1" }, |
| {_O(LM32_OP_CMPGEI), "cmpgei", "%1, %0, %s" }, |
| {_O(LM32_OP_CMPGEU), "cmpgeu", "%2, %0, %1" }, |
| {_O(LM32_OP_CMPGEUI), "cmpgeui", "%1, %0, %s" }, |
| {_O(LM32_OP_CMPGI), "cmpgi", "%1, %0, %s" }, |
| {_O(LM32_OP_CMPGU), "cmpgu", "%2, %0, %1" }, |
| {_O(LM32_OP_CMPGUI), "cmpgui", "%1, %0, %s" }, |
| {_O(LM32_OP_CMPNE), "cmpne", "%2, %0, %1" }, |
| {_O(LM32_OP_CMPNEI), "cmpnei", "%1, %0, %s" }, |
| {_O(LM32_OP_DIVU), "divu", "%2, %0, %1" }, |
| {_O(LM32_OP_LB), "lb", "%1, (%0+%s)" }, |
| {_O(LM32_OP_LBU), "lbu", "%1, (%0+%s)" }, |
| {_O(LM32_OP_LH), "lh", "%1, (%0+%s)" }, |
| {_O(LM32_OP_LHU), "lhu", "%1, (%0+%s)" }, |
| {_O(LM32_OP_LW), "lw", "%1, (%0+%s)" }, |
| {_O(LM32_OP_MODU), "modu", "%2, %0, %1" }, |
| {_O(LM32_OP_MULI), "muli", "%1, %0, %s" }, |
| {_O(LM32_OP_MUL), "mul", "%2, %0, %1" }, |
| {_O(LM32_OP_NORI), "nori", "%1, %0, %u" }, |
| {_O(LM32_OP_NOR), "nor", "%2, %0, %1" }, |
| {_O(LM32_OP_ORHI), "orhi", "%1, %0, %u" }, |
| {_O(LM32_OP_ORI), "ori", "%1, %0, %u" }, |
| {_O(LM32_OP_OR), "or", "%2, %0, %1" }, |
| {_O(LM32_OP_RCSR), "rcsr", "%2, %c", }, |
| {_O(LM32_OP_SB), "sb", "(%0+%s), %1" }, |
| {_O(LM32_OP_SEXTB), "sextb", "%2, %0", }, |
| {_O(LM32_OP_SEXTH), "sexth", "%2, %0", }, |
| {_O(LM32_OP_SH), "sh", "(%0+%s), %1" }, |
| {_O(LM32_OP_SLI), "sli", "%1, %0, %h" }, |
| {_O(LM32_OP_SL), "sl", "%2, %0, %1" }, |
| {_O(LM32_OP_SRI), "sri", "%1, %0, %h" }, |
| {_O(LM32_OP_SR), "sr", "%2, %0, %1" }, |
| {_O(LM32_OP_SRUI), "srui", "%1, %0, %d" }, |
| {_O(LM32_OP_SRU), "sru", "%2, %0, %s" }, |
| {_O(LM32_OP_SUB), "sub", "%2, %0, %s" }, |
| {_O(LM32_OP_SW), "sw", "(%0+%s), %1" }, |
| {_O(LM32_OP_WCSR), "wcsr", "%c, %1", }, |
| {_O(LM32_OP_XNORI), "xnori", "%1, %0, %u" }, |
| {_O(LM32_OP_XNOR), "xnor", "%2, %0, %1" }, |
| {_O(LM32_OP_XORI), "xori", "%1, %0, %u" }, |
| {_O(LM32_OP_XOR), "xor", "%2, %0, %1" }, |
| #undef _O |
| }; |
| |
| static const Lm32OpcodeInfo *find_opcode_info(uint32_t opcode) |
| { |
| const Lm32OpcodeInfo *info; |
| int i; |
| for (i = 0; i < ARRAY_SIZE(lm32_opcode_info); i++) { |
| info = &lm32_opcode_info[i]; |
| if ((opcode & info->op.mask) == info->op.code) { |
| return info; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| int print_insn_lm32(bfd_vma memaddr, struct disassemble_info *info) |
| { |
| fprintf_function fprintf_fn = info->fprintf_func; |
| void *stream = info->stream; |
| int rc; |
| uint8_t insn[4]; |
| const Lm32OpcodeInfo *opc_info; |
| uint32_t op; |
| const char *args_fmt; |
| |
| rc = info->read_memory_func(memaddr, insn, 4, info); |
| if (rc != 0) { |
| info->memory_error_func(rc, memaddr, info); |
| return -1; |
| } |
| |
| fprintf_fn(stream, "%02x %02x %02x %02x ", |
| insn[0], insn[1], insn[2], insn[3]); |
| |
| op = bfd_getb32(insn); |
| opc_info = find_opcode_info(op); |
| if (opc_info) { |
| fprintf_fn(stream, "%-8s ", opc_info->name); |
| args_fmt = opc_info->args_fmt; |
| while (args_fmt && *args_fmt) { |
| if (*args_fmt == '%') { |
| switch (*(++args_fmt)) { |
| case '0': { |
| uint8_t r0; |
| const char *r0_name; |
| r0 = (op >> 21) & 0x1f; |
| r0_name = find_reg_info(r0)->name; |
| fprintf_fn(stream, "%s", r0_name); |
| break; |
| } |
| case '1': { |
| uint8_t r1; |
| const char *r1_name; |
| r1 = (op >> 16) & 0x1f; |
| r1_name = find_reg_info(r1)->name; |
| fprintf_fn(stream, "%s", r1_name); |
| break; |
| } |
| case '2': { |
| uint8_t r2; |
| const char *r2_name; |
| r2 = (op >> 11) & 0x1f; |
| r2_name = find_reg_info(r2)->name; |
| fprintf_fn(stream, "%s", r2_name); |
| break; |
| } |
| case 'c': { |
| uint8_t csr; |
| const Lm32CsrInfo *info; |
| csr = (op >> 21) & 0x1f; |
| info = find_csr_info(csr); |
| if (info) { |
| fprintf_fn(stream, "%s", info->name); |
| } else { |
| fprintf_fn(stream, "0x%x", csr); |
| } |
| break; |
| } |
| case 'u': { |
| uint16_t u16; |
| u16 = op & 0xffff; |
| fprintf_fn(stream, "0x%x", u16); |
| break; |
| } |
| case 's': { |
| int16_t s16; |
| s16 = (int16_t)(op & 0xffff); |
| fprintf_fn(stream, "%d", s16); |
| break; |
| } |
| case 'r': { |
| uint32_t rela; |
| rela = memaddr + (((int16_t)(op & 0xffff)) << 2); |
| fprintf_fn(stream, "%x", rela); |
| break; |
| } |
| case 'R': { |
| uint32_t rela; |
| int32_t imm26; |
| imm26 = (int32_t)((op & 0x3ffffff) << 6) >> 4; |
| rela = memaddr + imm26; |
| fprintf_fn(stream, "%x", rela); |
| break; |
| } |
| case 'h': { |
| uint8_t u5; |
| u5 = (op & 0x1f); |
| fprintf_fn(stream, "%d", u5); |
| break; |
| } |
| default: |
| break; |
| } |
| } else { |
| fprintf_fn(stream, "%c", *args_fmt); |
| } |
| args_fmt++; |
| } |
| } else { |
| fprintf_fn(stream, ".word 0x%x", op); |
| } |
| |
| return 4; |
| } |
