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-rw-r--r--opcodes/z8k-dis.c574
1 files changed, 574 insertions, 0 deletions
diff --git a/opcodes/z8k-dis.c b/opcodes/z8k-dis.c
new file mode 100644
index 00000000000..7123622a291
--- /dev/null
+++ b/opcodes/z8k-dis.c
@@ -0,0 +1,574 @@
+/* Disassemble z8000 code.
+ Copyright 1992, 1993, 1995, 1998 Free Software Foundation, Inc.
+
+This file is part of GNU Binutils.
+
+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 <ansidecl.h>
+#include "sysdep.h"
+#include "dis-asm.h"
+
+#define DEFINE_TABLE
+#include "z8k-opc.h"
+
+
+#include <setjmp.h>
+
+
+typedef struct
+{
+ /* These are all indexed by nibble number (i.e only every other entry
+ of bytes is used, and every 4th entry of words). */
+ unsigned char nibbles[24];
+ unsigned char bytes[24];
+ unsigned short words[24];
+
+ /* Nibble number of first word not yet fetched. */
+ int max_fetched;
+ bfd_vma insn_start;
+ jmp_buf bailout;
+
+ long tabl_index;
+ char instr_asmsrc[80];
+ unsigned long arg_reg[0x0f];
+ unsigned long immediate;
+ unsigned long displacement;
+ unsigned long address;
+ unsigned long cond_code;
+ unsigned long ctrl_code;
+ unsigned long flags;
+ unsigned long interrupts;
+}
+instr_data_s;
+
+/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
+ to ADDR (exclusive) are valid. Returns 1 for success, longjmps
+ on error. */
+#define FETCH_DATA(info, nibble) \
+ ((nibble) < ((instr_data_s *)(info->private_data))->max_fetched \
+ ? 1 : fetch_data ((info), (nibble)))
+
+static int
+fetch_data (info, nibble)
+ struct disassemble_info *info;
+ int nibble;
+{
+ unsigned char mybuf[20];
+ int status;
+ instr_data_s *priv = (instr_data_s *)info->private_data;
+
+ if ((nibble % 4) != 0)
+ abort ();
+
+ status = (*info->read_memory_func) (priv->insn_start,
+ (bfd_byte *) mybuf,
+ nibble / 2,
+ info);
+ if (status != 0)
+ {
+ (*info->memory_error_func) (status, priv->insn_start, info);
+ longjmp (priv->bailout, 1);
+ }
+
+ {
+ int i;
+ unsigned char *p = mybuf ;
+
+ for (i = 0; i < nibble;)
+ {
+ priv->words[i] = (p[0] << 8) | p[1];
+
+ priv->bytes[i] = *p;
+ priv->nibbles[i++] = *p >> 4;
+ priv->nibbles[i++] = *p &0xf;
+
+ ++p;
+ priv->bytes[i] = *p;
+ priv->nibbles[i++] = *p >> 4;
+ priv->nibbles[i++] = *p & 0xf;
+
+ ++p;
+ }
+ }
+ priv->max_fetched = nibble;
+ return 1;
+}
+
+static char *codes[16] =
+{
+ "f",
+ "lt",
+ "le",
+ "ule",
+ "ov/pe",
+ "mi",
+ "eq",
+ "c/ult",
+ "t",
+ "ge",
+ "gt",
+ "ugt",
+ "nov/po",
+ "pl",
+ "ne",
+ "nc/uge"
+};
+
+int z8k_lookup_instr PARAMS ((unsigned char*, disassemble_info *));
+static void output_instr
+ PARAMS ((instr_data_s *, unsigned long, disassemble_info *));
+static void unpack_instr PARAMS ((instr_data_s *, int, disassemble_info *));
+static void unparse_instr PARAMS ((instr_data_s *));
+
+static int
+print_insn_z8k (addr, info, is_segmented)
+ bfd_vma addr;
+ disassemble_info *info;
+ int is_segmented;
+{
+ instr_data_s instr_data;
+
+ info->private_data = (PTR) &instr_data;
+ instr_data.max_fetched = 0;
+ instr_data.insn_start = addr;
+ if (setjmp (instr_data.bailout) != 0)
+ /* Error return. */
+ return -1;
+
+ instr_data.tabl_index = z8k_lookup_instr (instr_data.nibbles, info);
+ if (instr_data.tabl_index > 0)
+ {
+ unpack_instr (&instr_data, is_segmented, info);
+ unparse_instr (&instr_data);
+ output_instr (&instr_data, addr, info);
+ return z8k_table[instr_data.tabl_index].length;
+ }
+ else
+ {
+ FETCH_DATA (info, 4);
+ (*info->fprintf_func) (info->stream, ".word %02x%02x",
+ instr_data.bytes[0], instr_data.bytes[2]);
+ return 2;
+ }
+}
+
+int
+print_insn_z8001 (addr, info)
+ bfd_vma addr;
+ disassemble_info *info;
+{
+ return print_insn_z8k (addr, info, 1);
+}
+
+int
+print_insn_z8002 (addr, info)
+ bfd_vma addr;
+ disassemble_info *info;
+{
+ return print_insn_z8k (addr, info, 0);
+}
+
+int
+z8k_lookup_instr (nibbles, info)
+ unsigned char *nibbles;
+ disassemble_info *info;
+{
+
+ int nibl_index, tabl_index;
+ int nibl_matched;
+ unsigned short instr_nibl;
+ unsigned short tabl_datum, datum_class, datum_value;
+
+ nibl_matched = 0;
+ tabl_index = 0;
+ while (!nibl_matched && z8k_table[tabl_index].name)
+ {
+ nibl_matched = 1;
+ for (nibl_index = 0; nibl_index < z8k_table[tabl_index].length * 2 && nibl_matched; nibl_index++)
+ {
+ if ((nibl_index % 4) == 0)
+ /* Fetch one word at a time. */
+ FETCH_DATA (info, nibl_index + 4);
+ instr_nibl = nibbles[nibl_index];
+
+ tabl_datum = z8k_table[tabl_index].byte_info[nibl_index];
+ datum_class = tabl_datum & CLASS_MASK;
+ datum_value = ~CLASS_MASK & tabl_datum;
+
+ switch (datum_class)
+ {
+ case CLASS_BIT:
+ if (datum_value != instr_nibl)
+ nibl_matched = 0;
+ break;
+ case CLASS_00II:
+ if (!((~instr_nibl) & 0x4))
+ nibl_matched = 0;
+ break;
+ case CLASS_01II:
+ if (!(instr_nibl & 0x4))
+ nibl_matched = 0;
+ break;
+ case CLASS_0CCC:
+ if (!((~instr_nibl) & 0x8))
+ nibl_matched = 0;
+ break;
+ case CLASS_1CCC:
+ if (!(instr_nibl & 0x8))
+ nibl_matched = 0;
+ break;
+ case CLASS_0DISP7:
+ if (!((~instr_nibl) & 0x8))
+ nibl_matched = 0;
+ nibl_index += 1;
+ break;
+ case CLASS_1DISP7:
+ if (!(instr_nibl & 0x8))
+ nibl_matched = 0;
+ nibl_index += 1;
+ break;
+ case CLASS_REGN0:
+ if (instr_nibl == 0)
+ nibl_matched = 0;
+ break;
+ case CLASS_BIT_1OR2:
+ if ((instr_nibl | 0x2) != (datum_value | 0x2))
+ nibl_matched = 0;
+ break;
+ default:
+ break;
+ }
+ }
+ if (nibl_matched)
+ {
+ return tabl_index;
+ }
+
+ tabl_index++;
+ }
+ return -1;
+
+}
+
+static void
+output_instr (instr_data, addr, info)
+ instr_data_s *instr_data;
+ unsigned long addr;
+ disassemble_info *info;
+{
+ int loop, loop_limit;
+ char tmp_str[20];
+ char out_str[100];
+
+ strcpy (out_str, "\t");
+
+ loop_limit = z8k_table[instr_data->tabl_index].length * 2;
+ FETCH_DATA (info, loop_limit);
+ for (loop = 0; loop < loop_limit; loop++)
+ {
+ sprintf (tmp_str, "%x", instr_data->nibbles[loop]);
+ strcat (out_str, tmp_str);
+ }
+
+ while (loop++ < 8)
+ {
+ strcat (out_str, " ");
+ }
+
+ strcat (out_str, instr_data->instr_asmsrc);
+
+ (*info->fprintf_func) (info->stream, "%s", out_str);
+}
+
+static void
+unpack_instr (instr_data, is_segmented, info)
+ instr_data_s *instr_data;
+ int is_segmented;
+ disassemble_info *info;
+{
+ int nibl_count, loop;
+ unsigned short instr_nibl, instr_byte, instr_word;
+ long instr_long;
+ unsigned short tabl_datum, datum_class, datum_value;
+
+ nibl_count = 0;
+ loop = 0;
+ while (z8k_table[instr_data->tabl_index].byte_info[loop] != 0)
+ {
+ FETCH_DATA (info, nibl_count + 4 - (nibl_count % 4));
+ instr_nibl = instr_data->nibbles[nibl_count];
+ instr_byte = instr_data->bytes[nibl_count];
+ instr_word = instr_data->words[nibl_count];
+
+ tabl_datum = z8k_table[instr_data->tabl_index].byte_info[loop];
+ datum_class = tabl_datum & CLASS_MASK;
+ datum_value = tabl_datum & ~CLASS_MASK;
+
+ switch (datum_class)
+ {
+ case CLASS_X:
+ instr_data->address = instr_nibl;
+ break;
+ case CLASS_BA:
+ instr_data->displacement = instr_nibl;
+ break;
+ case CLASS_BX:
+ instr_data->arg_reg[datum_value] = instr_nibl;
+ break;
+ case CLASS_DISP:
+ switch (datum_value)
+ {
+ case ARG_DISP16:
+ instr_data->displacement = instr_word;
+ nibl_count += 3;
+ break;
+ case ARG_DISP12:
+ instr_data->displacement = instr_word & 0x0fff;
+ nibl_count += 2;
+ break;
+ default:
+ break;
+ }
+ break;
+ case CLASS_IMM:
+ switch (datum_value)
+ {
+ case ARG_IMM4:
+ instr_data->immediate = instr_nibl;
+ break;
+ case ARG_NIM8:
+ instr_data->immediate = (-instr_byte);
+ nibl_count += 1;
+ break;
+ case ARG_IMM8:
+ instr_data->immediate = instr_byte;
+ nibl_count += 1;
+ break;
+ case ARG_IMM16:
+ instr_data->immediate = instr_word;
+ nibl_count += 3;
+ break;
+ case ARG_IMM32:
+ FETCH_DATA (info, nibl_count + 8);
+ instr_long = (instr_data->words[nibl_count] << 16)
+ | (instr_data->words[nibl_count + 4]);
+ instr_data->immediate = instr_long;
+ nibl_count += 7;
+ break;
+ case ARG_IMMN:
+ instr_data->immediate = instr_nibl - 1;
+ break;
+ case ARG_IMM4M1:
+ instr_data->immediate = instr_nibl + 1;
+ break;
+ case ARG_IMM_1:
+ instr_data->immediate = 1;
+ break;
+ case ARG_IMM_2:
+ instr_data->immediate = 2;
+ break;
+ case ARG_IMM2:
+ instr_data->immediate = instr_nibl & 0x3;
+ break;
+ default:
+ break;
+ }
+ break;
+ case CLASS_CC:
+ instr_data->cond_code = instr_nibl;
+ break;
+ case CLASS_CTRL:
+ instr_data->ctrl_code = instr_nibl;
+ break;
+ case CLASS_DA:
+ case CLASS_ADDRESS:
+ if (is_segmented)
+ {
+ if (instr_nibl & 0x8)
+ {
+ FETCH_DATA (info, nibl_count + 8);
+ instr_long = (instr_data->words[nibl_count] << 16)
+ | (instr_data->words[nibl_count + 4]);
+ instr_data->address = ((instr_word & 0x7f00) << 8) +
+ (instr_long & 0xffff);
+ nibl_count += 7;
+ }
+ else
+ {
+ instr_data->address = ((instr_word & 0x7f00) << 8) +
+ (instr_word & 0x00ff);
+ nibl_count += 3;
+ }
+ }
+ else
+ {
+ instr_data->address = instr_word;
+ nibl_count += 3;
+ }
+ break;
+ case CLASS_0CCC:
+ instr_data->cond_code = instr_nibl & 0x7;
+ break;
+ case CLASS_1CCC:
+ instr_data->cond_code = instr_nibl & 0x7;
+ break;
+ case CLASS_0DISP7:
+ instr_data->displacement = instr_byte & 0x7f;
+ nibl_count += 1;
+ break;
+ case CLASS_1DISP7:
+ instr_data->displacement = instr_byte & 0x7f;
+ nibl_count += 1;
+ break;
+ case CLASS_01II:
+ instr_data->interrupts = instr_nibl & 0x3;
+ break;
+ case CLASS_00II:
+ instr_data->interrupts = instr_nibl & 0x3;
+ break;
+ case CLASS_BIT:
+ /* do nothing */
+ break;
+ case CLASS_IR:
+ instr_data->arg_reg[datum_value] = instr_nibl;
+ break;
+ case CLASS_FLAGS:
+ instr_data->flags = instr_nibl;
+ break;
+ case CLASS_REG:
+ instr_data->arg_reg[datum_value] = instr_nibl;
+ break;
+ case CLASS_REG_BYTE:
+ instr_data->arg_reg[datum_value] = instr_nibl;
+ break;
+ case CLASS_REG_WORD:
+ instr_data->arg_reg[datum_value] = instr_nibl;
+ break;
+ case CLASS_REG_QUAD:
+ instr_data->arg_reg[datum_value] = instr_nibl;
+ break;
+ case CLASS_REG_LONG:
+ instr_data->arg_reg[datum_value] = instr_nibl;
+ break;
+ case CLASS_REGN0:
+ instr_data->arg_reg[datum_value] = instr_nibl;
+ break;
+ default:
+ break;
+ }
+
+ loop += 1;
+ nibl_count += 1;
+ }
+}
+
+static void
+unparse_instr (instr_data)
+ instr_data_s *instr_data;
+{
+ unsigned short tabl_datum, datum_class, datum_value;
+ int loop, loop_limit;
+ char out_str[80], tmp_str[25];
+
+ sprintf (out_str, "\t%s\t", z8k_table[instr_data->tabl_index].name);
+
+ loop_limit = z8k_table[instr_data->tabl_index].noperands;
+ for (loop = 0; loop < loop_limit; loop++)
+ {
+ if (loop)
+ strcat (out_str, ",");
+
+ tabl_datum = z8k_table[instr_data->tabl_index].arg_info[loop];
+ datum_class = tabl_datum & CLASS_MASK;
+ datum_value = tabl_datum & ~CLASS_MASK;
+
+ switch (datum_class)
+ {
+ case CLASS_X:
+ sprintf (tmp_str, "0x%0lx(R%ld)", instr_data->address,
+ instr_data->arg_reg[datum_value]);
+ strcat (out_str, tmp_str);
+ break;
+ case CLASS_BA:
+ sprintf (tmp_str, "r%ld(#%lx)", instr_data->arg_reg[datum_value],
+ instr_data->immediate);
+ strcat (out_str, tmp_str);
+ break;
+ case CLASS_BX:
+ sprintf (tmp_str, "r%ld(R%ld)", instr_data->arg_reg[datum_value],
+ instr_data->arg_reg[ARG_RX]);
+ strcat (out_str, tmp_str);
+ break;
+ case CLASS_DISP:
+ sprintf (tmp_str, "#0x%0lx", instr_data->displacement);
+ strcat (out_str, tmp_str);
+ break;
+ case CLASS_IMM:
+ sprintf (tmp_str, "#0x%0lx", instr_data->immediate);
+ strcat (out_str, tmp_str);
+ break;
+ case CLASS_CC:
+ sprintf (tmp_str, "%s", codes[instr_data->cond_code]);
+ strcat (out_str, tmp_str);
+ break;
+ case CLASS_CTRL:
+ sprintf (tmp_str, "0x%0lx", instr_data->ctrl_code);
+ strcat (out_str, tmp_str);
+ break;
+ case CLASS_DA:
+ case CLASS_ADDRESS:
+ sprintf (tmp_str, "#0x%0lx", instr_data->address);
+ strcat (out_str, tmp_str);
+ break;
+ case CLASS_IR:
+ sprintf (tmp_str, "@R%ld", instr_data->arg_reg[datum_value]);
+ strcat (out_str, tmp_str);
+ break;
+ case CLASS_FLAGS:
+ sprintf (tmp_str, "0x%0lx", instr_data->flags);
+ strcat (out_str, tmp_str);
+ break;
+ case CLASS_REG_BYTE:
+ if (instr_data->arg_reg[datum_value] >= 0x8)
+ {
+ sprintf (tmp_str, "rl%ld",
+ instr_data->arg_reg[datum_value] - 0x8);
+ }
+ else
+ {
+ sprintf (tmp_str, "rh%ld", instr_data->arg_reg[datum_value]);
+ }
+ strcat (out_str, tmp_str);
+ break;
+ case CLASS_REG_WORD:
+ sprintf (tmp_str, "r%ld", instr_data->arg_reg[datum_value]);
+ strcat (out_str, tmp_str);
+ break;
+ case CLASS_REG_QUAD:
+ sprintf (tmp_str, "rq%ld", instr_data->arg_reg[datum_value]);
+ strcat (out_str, tmp_str);
+ break;
+ case CLASS_REG_LONG:
+ sprintf (tmp_str, "rr%ld", instr_data->arg_reg[datum_value]);
+ strcat (out_str, tmp_str);
+ break;
+ default:
+ break;
+ }
+ }
+
+ strcpy (instr_data->instr_asmsrc, out_str);
+}