Commit | Line | Data |
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1e608f98 | 1 | /* pj-dis.c -- Disassemble picoJava instructions. |
df7b86aa NC |
2 | Copyright 1999, 2000, 2001, 2002, 2005, 2007, 2012 |
3 | Free Software Foundation, Inc. | |
1e608f98 ILT |
4 | Contributed by Steve Chamberlain, of Transmeta (sac@pobox.com). |
5 | ||
9b201bb5 NC |
6 | This file is part of the GNU opcodes library. |
7 | ||
8 | This library is free software; you can redistribute it and/or modify | |
47b0e7ad | 9 | it under the terms of the GNU General Public License as published by |
9b201bb5 NC |
10 | the Free Software Foundation; either version 3, or (at your option) |
11 | any later version. | |
1e608f98 | 12 | |
9b201bb5 NC |
13 | It is distributed in the hope that it will be useful, but WITHOUT |
14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
16 | License for more details. | |
1e608f98 | 17 | |
47b0e7ad NC |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | MA 02110-1301, USA. */ | |
1e608f98 | 22 | |
0d8dfecf | 23 | #include "sysdep.h" |
df7b86aa | 24 | #include <stdio.h> |
1e608f98 ILT |
25 | #include "opcode/pj.h" |
26 | #include "dis-asm.h" | |
27 | ||
28 | extern const pj_opc_info_t pj_opc_info[512]; | |
29 | ||
ec22bdda | 30 | static int |
47b0e7ad | 31 | get_int (bfd_vma memaddr, int *iptr, struct disassemble_info *info) |
1e608f98 ILT |
32 | { |
33 | unsigned char ival[4]; | |
1e608f98 ILT |
34 | int status = info->read_memory_func (memaddr, ival, 4, info); |
35 | ||
7f6621cd KH |
36 | *iptr = (ival[0] << 24) |
37 | | (ival[1] << 16) | |
38 | | (ival[2] << 8) | |
39 | | (ival[3] << 0); | |
1e608f98 ILT |
40 | |
41 | return status; | |
42 | } | |
43 | ||
44 | int | |
47b0e7ad | 45 | print_insn_pj (bfd_vma addr, struct disassemble_info *info) |
1e608f98 ILT |
46 | { |
47 | fprintf_ftype fprintf_fn = info->fprintf_func; | |
48 | void *stream = info->stream; | |
49 | unsigned char opcode; | |
50 | int status; | |
51 | ||
52 | if ((status = info->read_memory_func (addr, &opcode, 1, info))) | |
53 | goto fail; | |
54 | ||
55 | if (opcode == 0xff) | |
56 | { | |
57 | unsigned char byte_2; | |
47b0e7ad | 58 | |
1e608f98 ILT |
59 | if ((status = info->read_memory_func (addr + 1, &byte_2, 1, info))) |
60 | goto fail; | |
0e073f4c | 61 | fprintf_fn (stream, "%s\t", pj_opc_info[opcode + byte_2].u.name); |
1e608f98 ILT |
62 | return 2; |
63 | } | |
64 | else | |
65 | { | |
66 | char *sep = "\t"; | |
67 | int insn_start = addr; | |
68 | const pj_opc_info_t *op = &pj_opc_info[opcode]; | |
69 | int a; | |
47b0e7ad | 70 | |
1e608f98 | 71 | addr++; |
0e073f4c | 72 | fprintf_fn (stream, "%s", op->u.name); |
1e608f98 ILT |
73 | |
74 | /* The tableswitch instruction is followed by the default | |
7f6621cd | 75 | address, low value, high value and the destinations. */ |
1e608f98 | 76 | |
0e073f4c | 77 | if (strcmp (op->u.name, "tableswitch") == 0) |
1e608f98 ILT |
78 | { |
79 | int lowval; | |
80 | int highval; | |
81 | int val; | |
82 | ||
83 | addr = (addr + 3) & ~3; | |
84 | if ((status = get_int (addr, &val, info))) | |
85 | goto fail; | |
86 | ||
ec22bdda | 87 | fprintf_fn (stream, " default: "); |
1e608f98 ILT |
88 | (*info->print_address_func) (val + insn_start, info); |
89 | addr += 4; | |
90 | ||
91 | if ((status = get_int (addr, &lowval, info))) | |
92 | goto fail; | |
93 | addr += 4; | |
94 | ||
95 | if ((status = get_int (addr, &highval, info))) | |
96 | goto fail; | |
97 | addr += 4; | |
98 | ||
ec22bdda KH |
99 | while (lowval <= highval) |
100 | { | |
101 | if ((status = get_int (addr, &val, info))) | |
102 | goto fail; | |
103 | fprintf_fn (stream, " %d:[", lowval); | |
104 | (*info->print_address_func) (val + insn_start, info); | |
105 | fprintf_fn (stream, " ]"); | |
106 | addr += 4; | |
107 | lowval++; | |
108 | } | |
1e608f98 ILT |
109 | return addr - insn_start; |
110 | } | |
111 | ||
112 | /* The lookupswitch instruction is followed by the default | |
113 | address, element count and pairs of values and | |
7f6621cd | 114 | addresses. */ |
0e073f4c | 115 | if (strcmp (op->u.name, "lookupswitch") == 0) |
1e608f98 ILT |
116 | { |
117 | int count; | |
118 | int val; | |
119 | ||
120 | addr = (addr + 3) & ~3; | |
121 | if ((status = get_int (addr, &val, info))) | |
122 | goto fail; | |
123 | addr += 4; | |
124 | ||
ec22bdda | 125 | fprintf_fn (stream, " default: "); |
1e608f98 ILT |
126 | (*info->print_address_func) (val + insn_start, info); |
127 | ||
128 | if ((status = get_int (addr, &count, info))) | |
129 | goto fail; | |
130 | addr += 4; | |
131 | ||
ec22bdda KH |
132 | while (count--) |
133 | { | |
134 | if ((status = get_int (addr, &val, info))) | |
135 | goto fail; | |
136 | addr += 4; | |
137 | fprintf_fn (stream, " %d:[", val); | |
1e608f98 | 138 | |
ec22bdda KH |
139 | if ((status = get_int (addr, &val, info))) |
140 | goto fail; | |
141 | addr += 4; | |
1e608f98 | 142 | |
ec22bdda KH |
143 | (*info->print_address_func) (val + insn_start, info); |
144 | fprintf_fn (stream, " ]"); | |
145 | } | |
1e608f98 ILT |
146 | return addr - insn_start; |
147 | } | |
47b0e7ad | 148 | |
1e608f98 ILT |
149 | for (a = 0; op->arg[a]; a++) |
150 | { | |
151 | unsigned char data[4]; | |
152 | int val = 0; | |
153 | int i; | |
154 | int size = ASIZE (op->arg[a]); | |
155 | ||
156 | if ((status = info->read_memory_func (addr, data, size, info))) | |
157 | goto fail; | |
158 | ||
159 | val = (UNS (op->arg[0]) || ((data[0] & 0x80) == 0)) ? 0 : -1; | |
160 | ||
161 | for (i = 0; i < size; i++) | |
162 | val = (val << 8) | (data[i] & 0xff); | |
163 | ||
164 | if (PCREL (op->arg[a])) | |
165 | (*info->print_address_func) (val + insn_start, info); | |
166 | else | |
167 | fprintf_fn (stream, "%s%d", sep, val); | |
168 | ||
169 | sep = ","; | |
170 | addr += size; | |
171 | } | |
172 | return op->len; | |
173 | } | |
174 | ||
175 | fail: | |
176 | info->memory_error_func (status, addr, info); | |
177 | return -1; | |
178 | } |