1 /* pj-dis.c -- Disassemble picoJava instructions.
2 Copyright (C) 1999 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 #include "opcode/pj.h"
25 extern const pj_opc_info_t pj_opc_info[512];
27 static int get_int (memaddr, iptr, info)
30 struct disassemble_info *info;
32 unsigned char ival[4];
34 int status = info->read_memory_func (memaddr, ival, 4, info);
36 *iptr = (ival[0] << 24)
45 print_insn_pj (addr, info)
47 struct disassemble_info *info;
49 fprintf_ftype fprintf_fn = info->fprintf_func;
50 void *stream = info->stream;
54 if ((status = info->read_memory_func (addr, &opcode, 1, info)))
60 if ((status = info->read_memory_func (addr + 1, &byte_2, 1, info)))
62 fprintf_fn (stream, "%s\t", pj_opc_info[opcode + byte_2].name);
68 int insn_start = addr;
69 const pj_opc_info_t *op = &pj_opc_info[opcode];
72 fprintf_fn (stream, "%s", op->name);
74 /* The tableswitch instruction is followed by the default
75 address, low value, high value and the destinations. */
77 if (strcmp (op->name, "tableswitch") == 0)
83 addr = (addr + 3) & ~3;
84 if ((status = get_int (addr, &val, info)))
87 fprintf_fn (stream," default: ");
88 (*info->print_address_func) (val + insn_start, info);
91 if ((status = get_int (addr, &lowval, info)))
95 if ((status = get_int (addr, &highval, info)))
99 while (lowval <= highval) {
100 if ((status = get_int (addr, &val, info)))
102 fprintf_fn (stream," %d:[", lowval);
103 (*info->print_address_func) (val + insn_start, info);
104 fprintf_fn (stream," ]");
108 return addr - insn_start;
111 /* The lookupswitch instruction is followed by the default
112 address, element count and pairs of values and
115 if (strcmp (op->name, "lookupswitch") == 0)
120 addr = (addr + 3) & ~3;
121 if ((status = get_int (addr, &val, info)))
125 fprintf_fn (stream," default: ");
126 (*info->print_address_func) (val + insn_start, info);
128 if ((status = get_int (addr, &count, info)))
133 if ((status = get_int (addr, &val, info)))
136 fprintf_fn (stream," %d:[", val);
138 if ((status = get_int (addr, &val, info)))
142 (*info->print_address_func) (val + insn_start, info);
143 fprintf_fn (stream," ]");
145 return addr - insn_start;
147 for (a = 0; op->arg[a]; a++)
149 unsigned char data[4];
152 int size = ASIZE (op->arg[a]);
154 if ((status = info->read_memory_func (addr, data, size, info)))
157 val = (UNS (op->arg[0]) || ((data[0] & 0x80) == 0)) ? 0 : -1;
159 for (i = 0; i < size; i++)
160 val = (val << 8) | (data[i] & 0xff);
162 if (PCREL (op->arg[a]))
163 (*info->print_address_func) (val + insn_start, info);
165 fprintf_fn (stream, "%s%d", sep, val);
174 info->memory_error_func (status, addr, info);