LXR qemu/tci-dis.c

   1/*
   2 * Tiny Code Interpreter for QEMU - disassembler
   3 *
   4 * Copyright (c) 2011 Stefan Weil
   5 *
   6 * This program is free software: you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation, either version 2 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20#include "dis-asm.h"
  21#include "tcg/tcg.h"
  22
  23/* Disassemble TCI bytecode. */
  24int print_insn_tci(bfd_vma addr, disassemble_info *info)
  25{
  26    int length;
  27    uint8_t byte;
  28    int status;
  29    TCGOpcode op;
  30
  31    status = info->read_memory_func(addr, &byte, 1, info);
  32    if (status != 0) {
  33        info->memory_error_func(status, addr, info);
  34        return -1;
  35    }
  36    op = byte;
  37
  38    addr++;
  39    status = info->read_memory_func(addr, &byte, 1, info);
  40    if (status != 0) {
  41        info->memory_error_func(status, addr, info);
  42        return -1;
  43    }
  44    length = byte;
  45
  46    if (op >= tcg_op_defs_max) {
  47        info->fprintf_func(info->stream, "illegal opcode %d", op);
  48    } else {
  49        const TCGOpDef *def = &tcg_op_defs[op];
  50        int nb_oargs = def->nb_oargs;
  51        int nb_iargs = def->nb_iargs;
  52        int nb_cargs = def->nb_cargs;
  53        /* TODO: Improve disassembler output. */
  54        info->fprintf_func(info->stream, "%s\to=%d i=%d c=%d",
  55                           def->name, nb_oargs, nb_iargs, nb_cargs);
  56    }
  57
  58    return length;
  59}
  60