1 /* pj-dis.c -- Disassemble picoJava instructions.
2 Copyright 1999, 2000, 2001, 2002, 2005 Free Software Foundation, Inc.
3 Contributed by Steve Chamberlain, of Transmeta (sac@pobox.com).
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.
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.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
18 MA 02110-1301, USA. */
22 #include "opcode/pj.h"
25 extern const pj_opc_info_t pj_opc_info[512];
28 get_int (bfd_vma memaddr, int *iptr, struct disassemble_info *info)
30 unsigned char ival[4];
31 int status = info->read_memory_func (memaddr, ival, 4, info);
33 *iptr = (ival[0] << 24)
42 print_insn_pj (bfd_vma addr, struct disassemble_info *info)
44 fprintf_ftype fprintf_fn = info->fprintf_func;
45 void *stream = info->stream;
49 if ((status = info->read_memory_func (addr, &opcode, 1, info)))
56 if ((status = info->read_memory_func (addr + 1, &byte_2, 1, info)))
58 fprintf_fn (stream, "%s\t", pj_opc_info[opcode + byte_2].u.name);
64 int insn_start = addr;
65 const pj_opc_info_t *op = &pj_opc_info[opcode];
69 fprintf_fn (stream, "%s", op->u.name);
71 /* The tableswitch instruction is followed by the default
72 address, low value, high value and the destinations. */
74 if (strcmp (op->u.name, "tableswitch") == 0)
80 addr = (addr + 3) & ~3;
81 if ((status = get_int (addr, &val, info)))
84 fprintf_fn (stream, " default: ");
85 (*info->print_address_func) (val + insn_start, info);
88 if ((status = get_int (addr, &lowval, info)))
92 if ((status = get_int (addr, &highval, info)))
96 while (lowval <= highval)
98 if ((status = get_int (addr, &val, info)))
100 fprintf_fn (stream, " %d:[", lowval);
101 (*info->print_address_func) (val + insn_start, info);
102 fprintf_fn (stream, " ]");
106 return addr - insn_start;
109 /* The lookupswitch instruction is followed by the default
110 address, element count and pairs of values and
112 if (strcmp (op->u.name, "lookupswitch") == 0)
117 addr = (addr + 3) & ~3;
118 if ((status = get_int (addr, &val, info)))
122 fprintf_fn (stream, " default: ");
123 (*info->print_address_func) (val + insn_start, info);
125 if ((status = get_int (addr, &count, info)))
131 if ((status = get_int (addr, &val, info)))
134 fprintf_fn (stream, " %d:[", val);
136 if ((status = get_int (addr, &val, info)))
140 (*info->print_address_func) (val + insn_start, info);
141 fprintf_fn (stream, " ]");
143 return addr - insn_start;
146 for (a = 0; op->arg[a]; a++)
148 unsigned char data[4];
151 int size = ASIZE (op->arg[a]);
153 if ((status = info->read_memory_func (addr, data, size, info)))
156 val = (UNS (op->arg[0]) || ((data[0] & 0x80) == 0)) ? 0 : -1;
158 for (i = 0; i < size; i++)
159 val = (val << 8) | (data[i] & 0xff);
161 if (PCREL (op->arg[a]))
162 (*info->print_address_func) (val + insn_start, info);
164 fprintf_fn (stream, "%s%d", sep, val);
173 info->memory_error_func (status, addr, info);