LXR qemu/disas/hexagon.c

   1/*
   2 *  Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
   3 *
   4 *  This program is free software; you can redistribute it and/or modify
   5 *  it under the terms of the GNU General Public License as published by
   6 *  the Free Software Foundation; either version 2 of the License, or
   7 *  (at your option) any later version.
   8 *
   9 *  This program is distributed in the hope that it will be useful,
  10 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 *  GNU General Public License for more details.
  13 *
  14 *  You should have received a copy of the GNU General Public License
  15 *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18/*
  19 * QEMU Hexagon Disassembler
  20 */
  21
  22#include "qemu/osdep.h"
  23#include "disas/dis-asm.h"
  24#include "target/hexagon/cpu_bits.h"
  25
  26/*
  27 * We will disassemble a packet with up to 4 instructions, so we need
  28 * a hefty size buffer.
  29 */
  30#define PACKET_BUFFER_LEN                   1028
  31
  32int print_insn_hexagon(bfd_vma memaddr, struct disassemble_info *info)
  33{
  34    uint32_t words[PACKET_WORDS_MAX];
  35    bool found_end = false;
  36    GString *buf = g_string_sized_new(PACKET_BUFFER_LEN);
  37    int i, len;
  38
  39    for (i = 0; i < PACKET_WORDS_MAX && !found_end; i++) {
  40        int status = (*info->read_memory_func)(memaddr + i * sizeof(uint32_t),
  41                                               (bfd_byte *)&words[i],
  42                                               sizeof(uint32_t), info);
  43        if (status) {
  44            if (i > 0) {
  45                break;
  46            }
  47            (*info->memory_error_func)(status, memaddr, info);
  48            return status;
  49        }
  50        if (is_packet_end(words[i])) {
  51            found_end = true;
  52        }
  53    }
  54
  55    if (!found_end) {
  56        (*info->fprintf_func)(info->stream, "<invalid>");
  57        return PACKET_WORDS_MAX * sizeof(uint32_t);
  58    }
  59
  60    len = disassemble_hexagon(words, i, memaddr, buf);
  61    (*info->fprintf_func)(info->stream, "%s", buf->str);
  62    g_string_free(buf, true);
  63
  64    return len;
  65}
  66