Initial revision

1 files changed, 330 insertions, 0 deletions

diff --git a/opcodes/m88k-dis.c b/opcodes/m88k-dis.c
new file mode 100644
index 00000000000..8af6b87929b
--- /dev/null
+++ b/opcodes/m88k-dis.c
@@ -0,0 +1,330 @@
+/* Print instructions for the Motorola 88000, for GDB and GNU Binutils.
+   Copyright (c) 1986, 1987, 1988, 1989, 1990, 1991, 1993, 1998
+   Free Software Foundation, Inc.
+   Contributed by Data General Corporation, November 1989.
+   Partially derived from an earlier printcmd.c.
+
+This file is part of GDB and the 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 "dis-asm.h"
+#include "opcode/m88k.h"
+#include "opintl.h"
+
+INSTAB  *hashtable[HASHVAL] = {0};
+
+static int
+m88kdis PARAMS ((bfd_vma, unsigned long, struct disassemble_info *));
+
+static void
+printop PARAMS ((struct disassemble_info *, OPSPEC *,
+		 unsigned long, bfd_vma, int));
+
+static void
+init_disasm PARAMS ((void));
+
+static void
+install PARAMS ((INSTAB *instptr));
+
+/*
+*		Disassemble an M88000 Instruction
+*
+*
+*       This module decodes the instruction at memaddr.
+*
+*			Revision History
+*
+*       Revision 1.0    11/08/85        Creation date by Motorola
+*			05/11/89	R. Trawick adapted to GDB interface.
+*			07/12/93	Ian Lance Taylor updated to
+*					binutils interface.
+*/
+
+int
+print_insn_m88k (memaddr, info)
+     bfd_vma memaddr;
+     struct disassemble_info *info;
+{
+  bfd_byte buffer[4];
+  int status;
+
+  /* Instruction addresses may have low two bits set. Clear them.	*/
+  memaddr &=~ (bfd_vma) 3;
+
+  status = (*info->read_memory_func) (memaddr, buffer, 4, info);
+  if (status != 0)
+    {
+      (*info->memory_error_func) (status, memaddr, info);
+      return -1;
+    }
+
+  return m88kdis (memaddr, bfd_getb32 (buffer), info);
+}
+
+/*
+ * disassemble the instruction in 'instruction'.
+ * 'pc' should be the address of this instruction, it will
+ *   be used to print the target address if this is a relative jump or call
+ * the disassembled instruction is written to 'info'.
+ * The function returns the length of this instruction in bytes.
+ */
+
+static int
+m88kdis (pc, instruction, info)
+     bfd_vma pc;
+     unsigned long instruction;
+     struct disassemble_info *info;
+{
+  static int ihashtab_initialized = 0;
+  unsigned int opcode;
+  INSTAB *entry_ptr;
+  int opmask;
+  unsigned int class;
+
+  if (! ihashtab_initialized)
+    init_disasm ();
+
+  /* create the appropriate mask to isolate the opcode */
+  opmask = DEFMASK;
+  class = instruction & DEFMASK;
+  if ((class >= SFU0) && (class <= SFU7))
+    {
+      if (instruction < SFU1)
+	opmask = CTRLMASK;
+      else
+	opmask = SFUMASK;
+    }
+  else if (class == RRR)
+    opmask = RRRMASK;
+  else if (class == RRI10)
+    opmask = RRI10MASK;
+
+  /* isolate the opcode */
+  opcode = instruction & opmask;
+
+  /* search the hash table with the isolated opcode */
+  for (entry_ptr = hashtable[opcode % HASHVAL];
+       (entry_ptr != NULL) && (entry_ptr->opcode != opcode);
+       entry_ptr = entry_ptr->next)
+    ;
+
+  if (entry_ptr == NULL)
+    (*info->fprintf_func) (info->stream, "word\t%08x", instruction);
+  else
+    {
+      (*info->fprintf_func) (info->stream, "%s", entry_ptr->mnemonic);
+      printop (info, &(entry_ptr->op1), instruction, pc, 1);
+      printop (info, &(entry_ptr->op2), instruction, pc, 0);
+      printop (info, &(entry_ptr->op3), instruction, pc, 0);
+    }
+
+  return 4;
+}
+
+/*
+*                      Decode an Operand of an Instruction
+*
+*			Functional Description
+*
+*       This module formats and writes an operand of an instruction to info
+*       based on the operand specification.  When the first flag is set this
+*       is the first operand of an instruction.  Undefined operand types
+*       cause a <dis error> message.
+*
+*			Parameters
+*	disassemble_info	where the operand may be printed
+*       OPSPEC  *opptr          Pointer to an operand specification
+*       UINT    inst            Instruction from which operand is extracted
+*	UINT    pc		PC of instruction; used for pc-relative disp.
+*       int     first           Flag which if nonzero indicates the first
+*                               operand of an instruction
+*
+*			Output
+*
+*       The operand specified is extracted from the instruction and is
+*       written to buf in the format specified. The operand is preceded
+*       by a comma if it is not the first operand of an instruction and it
+*       is not a register indirect form.  Registers are preceded by 'r' and
+*       hex values by '0x'.
+*
+*			Revision History
+*
+*       Revision 1.0    11/08/85        Creation date
+*/
+
+static void
+printop (info, opptr, inst, pc, first)
+     struct disassemble_info *info;
+     OPSPEC *opptr;
+     unsigned long inst;
+     bfd_vma pc;
+     int first;
+{
+  int extracted_field;
+  char *cond_mask_sym;
+
+  if (opptr->width == 0)
+    return;
+
+  if (! first)
+    {
+      switch (opptr->type)
+	{
+	case REGSC:
+	case CONT:
+	  break;
+	default:
+	  (*info->fprintf_func) (info->stream, ",");
+	  break;
+	}
+    }
+
+  switch (opptr->type)
+    {
+    case CRREG:
+      (*info->fprintf_func) (info->stream, "cr%d",
+			     UEXT (inst, opptr->offset, opptr->width));
+      break;
+
+    case FCRREG:
+      (*info->fprintf_func) (info->stream, "fcr%d",
+			     UEXT (inst, opptr->offset, opptr->width));
+      break;
+
+    case REGSC:
+      (*info->fprintf_func) (info->stream, "[r%d]",
+			     UEXT (inst, opptr->offset, opptr->width));
+      break;
+
+    case REG:
+      (*info->fprintf_func) (info->stream, "r%d",
+			     UEXT (inst, opptr->offset, opptr->width));
+      break;
+
+    case XREG:
+      (*info->fprintf_func) (info->stream, "x%d",
+			     UEXT (inst, opptr->offset, opptr->width));
+      break;
+
+    case HEX:
+      extracted_field = UEXT (inst, opptr->offset, opptr->width);
+      if (extracted_field == 0)
+	(*info->fprintf_func) (info->stream, "0");
+      else
+	(*info->fprintf_func) (info->stream, "0x%02x", extracted_field);
+      break;
+
+    case DEC:
+      extracted_field = UEXT (inst, opptr->offset, opptr->width);
+      (*info->fprintf_func) (info->stream, "%d", extracted_field);
+      break;
+
+    case CONDMASK:
+      extracted_field = UEXT (inst, opptr->offset, opptr->width);
+      switch (extracted_field & 0x0f)
+	{
+	case 0x1: cond_mask_sym = "gt0"; break;
+	case 0x2: cond_mask_sym = "eq0"; break;
+	case 0x3: cond_mask_sym = "ge0"; break;
+	case 0xc: cond_mask_sym = "lt0"; break;
+	case 0xd: cond_mask_sym = "ne0"; break;
+	case 0xe: cond_mask_sym = "le0"; break;
+	default: cond_mask_sym = NULL; break;
+	}
+      if (cond_mask_sym != NULL)
+	(*info->fprintf_func) (info->stream, "%s", cond_mask_sym);
+      else
+	(*info->fprintf_func) (info->stream, "%x", extracted_field);
+      break;
+			
+    case PCREL:
+      (*info->print_address_func)
+	(pc + (4 * (SEXT (inst, opptr->offset, opptr->width))),
+	 info);
+      break;
+
+    case CONT:
+      (*info->fprintf_func) (info->stream, "%d,r%d",
+			     UEXT (inst, opptr->offset, 5),
+			     UEXT (inst, (opptr->offset) + 5, 5));
+      break;
+
+    case BF:
+      (*info->fprintf_func) (info->stream, "%d<%d>",
+			      UEXT (inst, (opptr->offset) + 5, 5),
+			      UEXT (inst, opptr->offset, 5));
+      break;
+
+    default:
+      /* xgettext:c-format */
+      (*info->fprintf_func) (info->stream, _("# <dis error: %08x>"), inst);
+    }
+}
+
+/*
+*                 Initialize the Disassembler Instruction Table
+*
+*       Initialize the hash table and instruction table for the disassembler.
+*       This should be called once before the first call to disasm().
+*
+*			Parameters
+*
+*			Output
+*
+*       If the debug option is selected, certain statistics about the hashing
+*       distribution are written to stdout.
+*
+*			Revision History
+*
+*       Revision 1.0    11/08/85        Creation date
+*/
+
+static void
+init_disasm ()
+{
+   int i, size;
+
+   for (i = 0; i < HASHVAL; i++)
+     hashtable[i] = NULL;
+
+   size = sizeof (instructions) / sizeof (INSTAB);
+   for (i = 0; i < size; i++)
+     install (&instructions[i]);
+}
+
+/*
+*       Insert an instruction into the disassembler table by hashing the
+*       opcode and inserting it into the linked list for that hash value.
+*
+*			Parameters
+*
+*       INSTAB *instptr         Pointer to the entry in the instruction table
+*                               to be installed
+*
+*       Revision 1.0    11/08/85        Creation date
+*			05/11/89	R. TRAWICK ADAPTED FROM MOTOROLA
+*/
+
+static void
+install (instptr)
+     INSTAB *instptr;
+{
+  unsigned int i;
+
+  i = (instptr->opcode) % HASHVAL;
+  instptr->next = hashtable[i];
+  hashtable[i] = instptr;
+}