]>
Commit | Line | Data |
---|---|---|
1 | /* pj-dis.c -- Disassemble picoJava instructions. | |
2 | Copyright (C) 1999-2021 Free Software Foundation, Inc. | |
3 | Contributed by Steve Chamberlain, of Transmeta (sac@pobox.com). | |
4 | ||
5 | This file is part of the GNU opcodes library. | |
6 | ||
7 | This library is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3, or (at your option) | |
10 | any later version. | |
11 | ||
12 | It is distributed in the hope that it will be useful, but WITHOUT | |
13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
15 | License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
20 | MA 02110-1301, USA. */ | |
21 | ||
22 | #include "sysdep.h" | |
23 | #include <stdio.h> | |
24 | #include "opcode/pj.h" | |
25 | #include "disassemble.h" | |
26 | ||
27 | extern const pj_opc_info_t pj_opc_info[512]; | |
28 | ||
29 | static int | |
30 | get_int (bfd_vma memaddr, int *iptr, struct disassemble_info *info) | |
31 | { | |
32 | unsigned char ival[4]; | |
33 | int status = info->read_memory_func (memaddr, ival, 4, info); | |
34 | ||
35 | *iptr = (((unsigned) ival[0] << 24) | |
36 | | (ival[1] << 16) | |
37 | | (ival[2] << 8) | |
38 | | (ival[3] << 0)); | |
39 | ||
40 | return status; | |
41 | } | |
42 | ||
43 | int | |
44 | print_insn_pj (bfd_vma addr, struct disassemble_info *info) | |
45 | { | |
46 | fprintf_ftype fprintf_fn = info->fprintf_func; | |
47 | void *stream = info->stream; | |
48 | unsigned char opcode; | |
49 | int status; | |
50 | ||
51 | if ((status = info->read_memory_func (addr, &opcode, 1, info))) | |
52 | goto fail; | |
53 | ||
54 | if (opcode == 0xff) | |
55 | { | |
56 | unsigned char byte_2; | |
57 | ||
58 | if ((status = info->read_memory_func (addr + 1, &byte_2, 1, info))) | |
59 | goto fail; | |
60 | fprintf_fn (stream, "%s\t", pj_opc_info[opcode + byte_2].u.name); | |
61 | return 2; | |
62 | } | |
63 | else | |
64 | { | |
65 | char *sep = "\t"; | |
66 | int insn_start = addr; | |
67 | const pj_opc_info_t *op = &pj_opc_info[opcode]; | |
68 | int a; | |
69 | ||
70 | addr++; | |
71 | fprintf_fn (stream, "%s", op->u.name); | |
72 | ||
73 | /* The tableswitch instruction is followed by the default | |
74 | address, low value, high value and the destinations. */ | |
75 | ||
76 | if (strcmp (op->u.name, "tableswitch") == 0) | |
77 | { | |
78 | int lowval; | |
79 | int highval; | |
80 | int val; | |
81 | ||
82 | addr = (addr + 3) & ~3; | |
83 | if ((status = get_int (addr, &val, info))) | |
84 | goto fail; | |
85 | ||
86 | fprintf_fn (stream, " default: "); | |
87 | (*info->print_address_func) (val + insn_start, info); | |
88 | addr += 4; | |
89 | ||
90 | if ((status = get_int (addr, &lowval, info))) | |
91 | goto fail; | |
92 | addr += 4; | |
93 | ||
94 | if ((status = get_int (addr, &highval, info))) | |
95 | goto fail; | |
96 | addr += 4; | |
97 | ||
98 | while (lowval <= highval) | |
99 | { | |
100 | if ((status = get_int (addr, &val, info))) | |
101 | goto fail; | |
102 | fprintf_fn (stream, " %d:[", lowval); | |
103 | (*info->print_address_func) (val + insn_start, info); | |
104 | fprintf_fn (stream, " ]"); | |
105 | addr += 4; | |
106 | lowval++; | |
107 | } | |
108 | return addr - insn_start; | |
109 | } | |
110 | ||
111 | /* The lookupswitch instruction is followed by the default | |
112 | address, element count and pairs of values and | |
113 | addresses. */ | |
114 | if (strcmp (op->u.name, "lookupswitch") == 0) | |
115 | { | |
116 | int count; | |
117 | int val; | |
118 | ||
119 | addr = (addr + 3) & ~3; | |
120 | if ((status = get_int (addr, &val, info))) | |
121 | goto fail; | |
122 | addr += 4; | |
123 | ||
124 | fprintf_fn (stream, " default: "); | |
125 | (*info->print_address_func) (val + insn_start, info); | |
126 | ||
127 | if ((status = get_int (addr, &count, info))) | |
128 | goto fail; | |
129 | addr += 4; | |
130 | ||
131 | while (count--) | |
132 | { | |
133 | if ((status = get_int (addr, &val, info))) | |
134 | goto fail; | |
135 | addr += 4; | |
136 | fprintf_fn (stream, " %d:[", val); | |
137 | ||
138 | if ((status = get_int (addr, &val, info))) | |
139 | goto fail; | |
140 | addr += 4; | |
141 | ||
142 | (*info->print_address_func) (val + insn_start, info); | |
143 | fprintf_fn (stream, " ]"); | |
144 | } | |
145 | return addr - insn_start; | |
146 | } | |
147 | ||
148 | for (a = 0; op->arg[a]; a++) | |
149 | { | |
150 | unsigned char data[4]; | |
151 | int val = 0; | |
152 | int i; | |
153 | int size = ASIZE (op->arg[a]); | |
154 | ||
155 | if ((status = info->read_memory_func (addr, data, size, info))) | |
156 | goto fail; | |
157 | ||
158 | val = (UNS (op->arg[0]) || ((data[0] & 0x80) == 0)) ? 0 : -1; | |
159 | ||
160 | for (i = 0; i < size; i++) | |
161 | val = (val << 8) | (data[i] & 0xff); | |
162 | ||
163 | if (PCREL (op->arg[a])) | |
164 | (*info->print_address_func) (val + insn_start, info); | |
165 | else | |
166 | fprintf_fn (stream, "%s%d", sep, val); | |
167 | ||
168 | sep = ","; | |
169 | addr += size; | |
170 | } | |
171 | return op->len; | |
172 | } | |
173 | ||
174 | fail: | |
175 | info->memory_error_func (status, addr, info); | |
176 | return -1; | |
177 | } |