Archipelago » qemu

/*

 * Tiny Code Interpreter for QEMU - disassembler

 *

 * Copyright (c) 2011 Stefan Weil

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

#include "disas/bfd.h"

#include "tcg/tcg.h"

/* Disassemble TCI bytecode. */

int print_insn_tci(bfd_vma addr, disassemble_info *info)

{

    int length;

    uint8_t byte;

    int status;

    TCGOpcode op;

    status = info->read_memory_func(addr, &byte, 1, info);

    if (status != 0) {

        info->memory_error_func(status, addr, info);

        return -1;

    }

    op = byte;

    addr++;

    status = info->read_memory_func(addr, &byte, 1, info);

    if (status != 0) {

        info->memory_error_func(status, addr, info);

        return -1;

    }

    length = byte;

    if (op >= tcg_op_defs_max) {

        info->fprintf_func(info->stream, "illegal opcode %d", op);

    } else {

        const TCGOpDef *def = &tcg_op_defs[op];

        int nb_oargs = def->nb_oargs;

        int nb_iargs = def->nb_iargs;

        int nb_cargs = def->nb_cargs;

        /* TODO: Improve disassembler output. */

        info->fprintf_func(info->stream, "%s\to=%d i=%d c=%d",

                           def->name, nb_oargs, nb_iargs, nb_cargs);

    }

    return length;

}