diff options
Diffstat (limited to 'lm32-dis.c')
| -rw-r--r-- | lm32-dis.c | 361 |
1 files changed, 361 insertions, 0 deletions
diff --git a/lm32-dis.c b/lm32-dis.c new file mode 100644 index 0000000..709ed32 --- /dev/null +++ b/lm32-dis.c @@ -0,0 +1,361 @@ +/* + * 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 "dis-asm.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 char *csr_name; + csr = (op >> 21) & 0x1f; + csr_name = find_csr_info(csr)->name; + if (csr_name) { + fprintf_fn(stream, "%s", csr_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; +} |
