xref: /openbmc/qemu/disas/hexagon.c (revision 6fdc5bc1)
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;
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     buf = g_string_sized_new(PACKET_BUFFER_LEN);
61     len = disassemble_hexagon(words, i, memaddr, buf);
62     (*info->fprintf_func)(info->stream, "%s", buf->str);
63     g_string_free(buf, true);
64 
65     return len;
66 }
67