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-rw-r--r--opcodes/pj-dis.c175
1 files changed, 175 insertions, 0 deletions
diff --git a/opcodes/pj-dis.c b/opcodes/pj-dis.c
new file mode 100644
index 0000000..c098295
--- /dev/null
+++ b/opcodes/pj-dis.c
@@ -0,0 +1,175 @@
+/* pj-dis.c -- Disassemble picoJava instructions.
+ Copyright (C) 1999 Free Software Foundation, Inc.
+ Contributed by Steve Chamberlain, of Transmeta (sac@pobox.com).
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+
+#include <stdio.h>
+#include "opcode/pj.h"
+#include "dis-asm.h"
+
+extern const pj_opc_info_t pj_opc_info[512];
+
+static int get_int (memaddr, iptr, info)
+ bfd_vma memaddr;
+ int *iptr;
+ struct disassemble_info *info;
+{
+ unsigned char ival[4];
+
+ int status = info->read_memory_func (memaddr, ival, 4, info);
+
+ *iptr = (ival[0] << 24)
+ | (ival[1] << 16)
+ | (ival[2] << 8)
+ | (ival[3] << 0) ;
+
+ return status;
+}
+
+int
+print_insn_pj (addr, info)
+ bfd_vma addr;
+ struct disassemble_info *info;
+{
+ fprintf_ftype fprintf_fn = info->fprintf_func;
+ void *stream = info->stream;
+ unsigned char opcode;
+ int status;
+
+ if ((status = info->read_memory_func (addr, &opcode, 1, info)))
+ goto fail;
+
+ if (opcode == 0xff)
+ {
+ unsigned char byte_2;
+ if ((status = info->read_memory_func (addr + 1, &byte_2, 1, info)))
+ goto fail;
+ fprintf_fn (stream, "%s\t", pj_opc_info[opcode + byte_2].name);
+ return 2;
+ }
+ else
+ {
+ char *sep = "\t";
+ int insn_start = addr;
+ const pj_opc_info_t *op = &pj_opc_info[opcode];
+ int a;
+ addr++;
+ fprintf_fn (stream, "%s", op->name);
+
+ /* The tableswitch instruction is followed by the default
+ address, low value, high value and the destinations. */
+
+ if (strcmp (op->name, "tableswitch") == 0)
+ {
+ int lowval;
+ int highval;
+ int val;
+
+ addr = (addr + 3) & ~3;
+ if ((status = get_int (addr, &val, info)))
+ goto fail;
+
+ fprintf_fn (stream," default: ");
+ (*info->print_address_func) (val + insn_start, info);
+ addr += 4;
+
+ if ((status = get_int (addr, &lowval, info)))
+ goto fail;
+ addr += 4;
+
+ if ((status = get_int (addr, &highval, info)))
+ goto fail;
+ addr += 4;
+
+ while (lowval <= highval) {
+ if ((status = get_int (addr, &val, info)))
+ goto fail;
+ fprintf_fn (stream," %d:[", lowval);
+ (*info->print_address_func) (val + insn_start, info);
+ fprintf_fn (stream," ]");
+ addr += 4;
+ lowval++;
+ }
+ return addr - insn_start;
+ }
+
+ /* The lookupswitch instruction is followed by the default
+ address, element count and pairs of values and
+ addresses. */
+
+ if (strcmp (op->name, "lookupswitch") == 0)
+ {
+ int count;
+ int val;
+
+ addr = (addr + 3) & ~3;
+ if ((status = get_int (addr, &val, info)))
+ goto fail;
+ addr += 4;
+
+ fprintf_fn (stream," default: ");
+ (*info->print_address_func) (val + insn_start, info);
+
+ if ((status = get_int (addr, &count, info)))
+ goto fail;
+ addr += 4;
+
+ while (count--) {
+ if ((status = get_int (addr, &val, info)))
+ goto fail;
+ addr += 4;
+ fprintf_fn (stream," %d:[", val);
+
+ if ((status = get_int (addr, &val, info)))
+ goto fail;
+ addr += 4;
+
+ (*info->print_address_func) (val + insn_start, info);
+ fprintf_fn (stream," ]");
+ }
+ return addr - insn_start;
+ }
+ for (a = 0; op->arg[a]; a++)
+ {
+ unsigned char data[4];
+ int val = 0;
+ int i;
+ int size = ASIZE (op->arg[a]);
+
+ if ((status = info->read_memory_func (addr, data, size, info)))
+ goto fail;
+
+ val = (UNS (op->arg[0]) || ((data[0] & 0x80) == 0)) ? 0 : -1;
+
+ for (i = 0; i < size; i++)
+ val = (val << 8) | (data[i] & 0xff);
+
+ if (PCREL (op->arg[a]))
+ (*info->print_address_func) (val + insn_start, info);
+ else
+ fprintf_fn (stream, "%s%d", sep, val);
+
+ sep = ",";
+ addr += size;
+ }
+ return op->len;
+ }
+
+ fail:
+ info->memory_error_func (status, addr, info);
+ return -1;
+}