bd78129dd66c404468f2c458c0a729f48100ff3a
[openocd.git] / src / target / a64_disassembler.c
1 /***************************************************************************
2 * Copyright (C) 2019 by Mete Balci *
3 * metebalci@gmail.com *
4 * *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
9 * *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
14 * *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program. If not, see <http://www.gnu.org/licenses/>. *
17 ***************************************************************************/
18
19 #ifdef HAVE_CONFIG_H
20 #include "config.h"
21 #endif
22
23 #include <helper/log.h>
24 #include "target.h"
25 #include "a64_disassembler.h"
26
27 #if HAVE_CAPSTONE
28
29 #include <capstone/capstone.h>
30
31 static void print_opcode(struct command_invocation *cmd, const cs_insn *insn)
32 {
33 uint32_t opcode = 0;
34
35 memcpy(&opcode, insn->bytes, insn->size);
36
37 if (insn->size == 4) {
38
39 uint16_t opcode_high = opcode >> 16;
40
41 opcode = opcode & 0xffff;
42
43 command_print(cmd,
44 "0x%08" PRIx64" %04x %04x\t%s\t%s",
45 insn->address,
46 opcode,
47 opcode_high,
48 insn->mnemonic,
49 insn->op_str);
50
51 } else {
52
53 command_print(
54 cmd,
55 "0x%08" PRIx64" %04x\t%s\t%s",
56 insn->address,
57 opcode,
58 insn->mnemonic,
59 insn->op_str);
60
61 }
62 }
63
64 int a64_disassemble(struct command_invocation *cmd, struct target *target, target_addr_t address, size_t count)
65 {
66 int ret;
67 int csret;
68 csh handle;
69
70 csret = cs_open(CS_ARCH_ARM64, CS_MODE_LITTLE_ENDIAN, &handle);
71
72 if (csret != CS_ERR_OK) {
73
74 LOG_ERROR("cs_open() failed: %s", cs_strerror(csret));
75 return ERROR_FAIL;
76
77 }
78
79 csret = cs_option(handle, CS_OPT_SKIPDATA, CS_OPT_ON);
80
81 if (csret != CS_ERR_OK) {
82
83 LOG_ERROR("cs_option() failed: %s", cs_strerror(csret));
84 cs_close(&handle);
85 return ERROR_FAIL;
86
87 }
88
89 cs_insn *insn = cs_malloc(handle);
90
91 if (csret != CS_ERR_OK) {
92
93 LOG_ERROR("cs_malloc() failed: %s", cs_strerror(csret));
94 cs_close(&handle);
95 return ERROR_FAIL;
96
97 }
98
99 while (count > 0) {
100
101 uint8_t buffer[4];
102
103 ret = target_read_buffer(target, address, sizeof(buffer), buffer);
104
105 if (ret != ERROR_OK) {
106 cs_free(insn, 1);
107 cs_close(&handle);
108 return ret;
109 }
110
111 size_t size = sizeof(buffer);
112 const uint8_t *tmp = buffer;
113
114 ret = cs_disasm_iter(handle, &tmp, &size, &address, insn);
115
116 if (!ret) {
117
118 LOG_ERROR("cs_disasm_iter() failed: %s", cs_strerror(cs_errno(handle)));
119 cs_free(insn, 1);
120 cs_close(&handle);
121 return ERROR_FAIL;
122
123 }
124
125 print_opcode(cmd, insn);
126 count--;
127
128 }
129
130 cs_free(insn, 1);
131 cs_close(&handle);
132
133 return ERROR_OK;
134 }
135
136 #else
137
138 int a64_disassemble(struct command_invocation *cmd, struct target *target, target_addr_t address, size_t count)
139 {
140 command_print(cmd, "capstone disassembly framework required");
141
142 return ERROR_FAIL;
143 }
144
145 #endif

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