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
  32 int 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 }