[thirdparty/binutils-gdb.git] / opcodes / mcore-dis.c

/* Disassemble Motorolla M*Core instructions.
   Copyright (C) 1993, 1999 Free Software Foundation, Inc.

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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include <stdio.h>
#define STATIC_TABLE
#define DEFINE_TABLE

#include "mcore-opc.h"
#include "dis-asm.h"

/* Mask for each mcore_opclass: */
static const unsigned short imsk[] =
{
    /* O0  */ 0xFFFF,
    /* OT  */ 0xFFFC,
    /* O1  */ 0xFFF0,
    /* OC  */ 0xFFE0,
    /* O2  */ 0xFF00,
    /* X1  */ 0xFFF0,
    /* OI  */ 0xFE00,
    /* OB  */ 0xFE00,
	      
    /* OMa */ 0xFFF0,
    /* SI  */ 0xFE00,
    /* I7  */ 0xF800,
    /* LS  */ 0xF000,
    /* BR  */ 0xF800,
    /* BL  */ 0xFF00,
    /* LR  */ 0xF000,
    /* LJ  */ 0xFF00,
	      
    /* RM  */ 0xFFF0,
    /* RQ  */ 0xFFF0,
    /* JSR */ 0xFFF0,
    /* JMP */ 0xFFF0,
    /* OBRa*/ 0xFFF0,
    /* OBRb*/ 0xFF80,
    /* OBRc*/ 0xFF00,
    /* OBR2*/ 0xFE00,
	      
    /* O1R1*/ 0xFFF0,
    /* OMb */ 0xFF80,
    /* OMc */ 0xFF00,
    /* SIa */ 0xFE00,

/* start-sanitize-m340 */
  /* MULSH */ 0xFF00,
/* end-sanitize-m340 */
		 
    /* JC  */ 0,		/* JC,JU,JL don't appear in object */
    /* JU  */ 0,
    /* JL  */ 0,
    /* RSI */ 0,
    /* DO21*/ 0,
    /* OB2 */ 0 		/* OB2 won't appear in object. */
};

static const char * grname[] =
{
 "r0",  "r1",  "r2",  "r3",  "r4",  "r5",  "r6",  "r7",
 "r8",  "r9", "r10", "r11", "r12", "r13", "r14", "r15"
};

static const char X[] = "??";

static const char * crname[] =
{
  "psr",  "vbr", "epsr", "fpsr", "epc",  "fpc",  "ss0",  "ss1",
  "ss2",  "ss3", "ss4",  "gcr",  "gsr",     X,      X,      X,
     X,      X,      X,      X,      X,     X,      X,      X,
     X,      X,      X,      X,      X,     X,      X,      X
};

static const unsigned isiz[] = { 2, 0, 1, 0 };

int 
print_insn_mcore (memaddr, info)
     bfd_vma memaddr;
     struct disassemble_info * info;
{
  unsigned char       ibytes[4];
  fprintf_ftype       fprintf = info->fprintf_func;
  void *              stream = info->stream;
  unsigned short      inst;
  mcore_opcode_info * op;
  int                 status;

  info->bytes_per_chunk = 2;

  status = info->read_memory_func (memaddr, ibytes, 2, info);

  if (status != 0) 
    {
      info->memory_error_func (status, memaddr, info);
      return -1;
    }

/* start-sanitize-m340 */
  if (info->endian == BFD_ENDIAN_BIG)
/* end-sanitize-m340 */
    inst = (ibytes[0] << 8) | ibytes[1];
/* start-sanitize-m340 */
  else if (info->endian == BFD_ENDIAN_LITTLE)
    inst = (ibytes[1] << 8) | ibytes[0];
  else
    abort ();
/* end-sanitize-m340 */

  /* Just a linear search of the table.  */
  for (op = mcore_table; op->name != 0; op ++)
    if (op->inst == (inst & imsk[op->opclass]))
      break;

  if (op->name == 0)
    fprintf (stream, ".word 0x%04x", inst);
  else
    {
      const char * name = grname[inst & 0x0F];
      
      fprintf (stream, "%s", op->name);
      
      switch (op->opclass)
	{
	case O0: break;
	case OT: fprintf (stream, "\t%d", inst & 0x3); break;
	case O1:
	case JMP:
	case JSR: fprintf (stream, "\t%s", name); break;
	case OC:  fprintf (stream, "\t%s, %s", name, crname[(inst >> 4) & 0x1F]); break;
	case O1R1: fprintf (stream, "\t%s, r1", name); break;
/* start-sanitize-m340 */
	case MULSH:
/* end-sanitize-m340 */
	case O2: fprintf (stream, "\t%s, %s", name, grname[(inst >> 4) & 0xF]); break;
	case X1: fprintf (stream, "\tr1, %s", name); break;
	case OI: fprintf (stream, "\t%s, %d", name, ((inst >> 4) & 0x1F) + 1); break;
	case RM: fprintf (stream, "\t%s-r15, (r0)", name); break;
	case RQ: fprintf (stream, "\tr4-r7, (%s)", name); break;
	case OB:
	case OBRa:
	case OBRb:
	case OBRc:
	case SI:
	case SIa:
	case OMa:
	case OMb:
	case OMc: fprintf (stream, "\t%s, %d", name, (inst >> 4) & 0x1F); break;
	case I7: fprintf (stream, "\t%s, %d", name, (inst >> 4) & 0x7F); break;
	case LS: fprintf (stream, "\t%s, (%s, %d)", grname[(inst >> 8) & 0xF],
			  name, ((inst >> 4) & 0xF) << isiz[(inst >> 13) & 3]);
	  break;
	  
	case BR:
	  {
	    long val = inst & 0x3FF;
	    
	    if (inst & 0x400)
	      val |= 0xFFFFFC00;
	    
	    fprintf (stream, "\t0x%x", memaddr + 2 + (val<<1));
	    
	    if (strcmp (op->name, "bsr") == 0)
	      {
		/* for bsr, we'll try to get a symbol for the target */
		val = memaddr + 2 + (val << 1);
		
		if (info->print_address_func && val != 0)
		  {
		    fprintf (stream, "\t// ");
		    info->print_address_func (val, info);
		  }
	      }
	  }
	  break;
	  
	case BL:
	  {
	    long val;
	    val = (inst & 0x000F);
	    fprintf (stream, "\t%s, 0x%x",
		    grname[(inst >> 4) & 0xF], memaddr - (val << 1));
	  }
	  break;
	  
	case LR:
	  {
	    unsigned long val;
	    
	    val = (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC;
	    
	    status = info->read_memory_func (val, ibytes, 4, info);
	    if (status != 0) 
	      {
		info->memory_error_func (status, memaddr, info);
		break;
	      }
	    
/* start-sanitize-m340 */
	    if (info->endian == BFD_ENDIAN_LITTLE)
	      val = (ibytes[3] << 24) | (ibytes[2] << 16)
		| (ibytes[1] << 8) | (ibytes[0]);
	    else
/* end-sanitize-m340 */
	      val = (ibytes[0] << 24) | (ibytes[1] << 16)
		| (ibytes[2] << 8) | (ibytes[3]);
	    
	    /* Removed [] around literal value to match ABI syntax 12/95.  */
	    fprintf (stream, "\t%s, 0x%X", grname[(inst >> 8) & 0xF], val);

	    if (val == 0)
	      fprintf (stream, "\t// from address pool at 0x%x",
		       (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC);
	  }
	  break;
	  
	case LJ:
	  {
	    unsigned long val;
	    
	    val = (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC;
	    
	    status = info->read_memory_func (val, ibytes, 4, info);
	    if (status != 0) 
	      {
		info->memory_error_func (status, memaddr, info);
		break;
	      }

/* start-sanitize-m340 */
	    if (info->endian == BFD_ENDIAN_LITTLE)
	      val = (ibytes[3] << 24) | (ibytes[2] << 16)
		| (ibytes[1] << 8) | (ibytes[0]);
	    else
/* end-sanitize-m340 */
	      val = (ibytes[0] << 24) | (ibytes[1] << 16)
		| (ibytes[2] << 8) | (ibytes[3]);
	    
	    /* Removed [] around literal value to match ABI syntax 12/95.  */
	    fprintf (stream, "\t0x%X", val);
	    /* For jmpi/jsri, we'll try to get a symbol for the target.  */
	    if (info->print_address_func && val != 0)
	      {
		fprintf (stream, "\t// ");
		info->print_address_func (val, info);
	      }
	    else
	      {
		fprintf (stream, "\t// from address pool at 0x%x",
			 (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC);
	      }
	  }
	  break;
	  
	default:
	  /* if the disassembler lags the instruction set */
	  fprintf (stream, "\tundecoded operands, inst is 0x%04x", inst);
	  break;
	}
    }
  
  /* Say how many bytes we consumed? */
  return 2;
}
Commit	Line	Data
3f230321 NC	1	/* Disassemble Motorolla M*Core instructions.
	2	Copyright (C) 1993, 1999 Free Software Foundation, Inc.
	3
	4	This program is free software; you can redistribute it and/or modify
	5	it under the terms of the GNU General Public License as published by
	6	the Free Software Foundation; either version 2 of the License, or
	7	(at your option) any later version.
	8
	9	This program is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	GNU General Public License for more details.
	13
	14	You should have received a copy of the GNU General Public License
	15	along with this program; if not, write to the Free Software
	16	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
	17
	18	#include <stdio.h>
	19	#define STATIC_TABLE
	20	#define DEFINE_TABLE
	21
	22	#include "mcore-opc.h"
	23	#include "dis-asm.h"
	24
	25	/* Mask for each mcore_opclass: */
	26	static const unsigned short imsk[] =
	27	{
	28	/* O0 */ 0xFFFF,
	29	/* OT */ 0xFFFC,
	30	/* O1 */ 0xFFF0,
	31	/* OC */ 0xFFE0,
	32	/* O2 */ 0xFF00,
	33	/* X1 */ 0xFFF0,
	34	/* OI */ 0xFE00,
	35	/* OB */ 0xFE00,
	36
	37	/* OMa */ 0xFFF0,
	38	/* SI */ 0xFE00,
	39	/* I7 */ 0xF800,
	40	/* LS */ 0xF000,
	41	/* BR */ 0xF800,
	42	/* BL */ 0xFF00,
	43	/* LR */ 0xF000,
	44	/* LJ */ 0xFF00,
	45
	46	/* RM */ 0xFFF0,
	47	/* RQ */ 0xFFF0,
	48	/* JSR */ 0xFFF0,
	49	/* JMP */ 0xFFF0,
	50	/* OBRa*/ 0xFFF0,
	51	/* OBRb*/ 0xFF80,
	52	/* OBRc*/ 0xFF00,
	53	/* OBR2*/ 0xFE00,
	54
	55	/* O1R1*/ 0xFFF0,
	56	/* OMb */ 0xFF80,
	57	/* OMc */ 0xFF00,
	58	/* SIa */ 0xFE00,
	59
	60	/* start-sanitize-m340 */
	61	/* MULSH */ 0xFF00,
	62	/* end-sanitize-m340 */
	63
	64	/* JC / 0, / JC,JU,JL don't appear in object */
65	/* JU */ 0,
66	/* JL */ 0,
67	/* RSI */ 0,
68	/* DO21*/ 0,
69	/* OB2 / 0 / OB2 won't appear in object. */
70	};
71
72	static const char * grname[] =
73	{
74	"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
75	"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
76	};
77
78	static const char X[] = "??";
79
80	static const char * crname[] =
81	{
82	"psr", "vbr", "epsr", "fpsr", "epc", "fpc", "ss0", "ss1",
83	"ss2", "ss3", "ss4", "gcr", "gsr", X, X, X,
84	X, X, X, X, X, X, X, X,
85	X, X, X, X, X, X, X, X
86	};
87
88	static const unsigned isiz[] = { 2, 0, 1, 0 };
89
90	int
91	print_insn_mcore (memaddr, info)
92	bfd_vma memaddr;
93	struct disassemble_info * info;
94	{
95	unsigned char ibytes[4];
96	fprintf_ftype fprintf = info->fprintf_func;
97	void * stream = info->stream;
98	unsigned short inst;
99	mcore_opcode_info * op;
100	int status;
101
102	info->bytes_per_chunk = 2;
103
104	status = info->read_memory_func (memaddr, ibytes, 2, info);
105
106	if (status != 0)
107	{
108	info->memory_error_func (status, memaddr, info);
109	return -1;
110	}
111
112	/* start-sanitize-m340 */
113	if (info->endian == BFD_ENDIAN_BIG)
114	/* end-sanitize-m340 */
115	inst = (ibytes[0] << 8) \| ibytes[1];
116	/* start-sanitize-m340 */
117	else if (info->endian == BFD_ENDIAN_LITTLE)
118	inst = (ibytes[1] << 8) \| ibytes[0];
119	else
120	abort ();
121	/* end-sanitize-m340 */
122
123	/* Just a linear search of the table. */
124	for (op = mcore_table; op->name != 0; op ++)
125	if (op->inst == (inst & imsk[op->opclass]))
126	break;
127
128	if (op->name == 0)
129	fprintf (stream, ".word 0x%04x", inst);
130	else
131	{
132	const char * name = grname[inst & 0x0F];
133
134	fprintf (stream, "%s", op->name);
135
136	switch (op->opclass)
137	{
138	case O0: break;
139	case OT: fprintf (stream, "\t%d", inst & 0x3); break;
140	case O1:
141	case JMP:
142	case JSR: fprintf (stream, "\t%s", name); break;
143	case OC: fprintf (stream, "\t%s, %s", name, crname[(inst >> 4) & 0x1F]); break;
144	case O1R1: fprintf (stream, "\t%s, r1", name); break;
145	/* start-sanitize-m340 */
146	case MULSH:
147	/* end-sanitize-m340 */
148	case O2: fprintf (stream, "\t%s, %s", name, grname[(inst >> 4) & 0xF]); break;
149	case X1: fprintf (stream, "\tr1, %s", name); break;
150	case OI: fprintf (stream, "\t%s, %d", name, ((inst >> 4) & 0x1F) + 1); break;
151	case RM: fprintf (stream, "\t%s-r15, (r0)", name); break;
152	case RQ: fprintf (stream, "\tr4-r7, (%s)", name); break;
153	case OB:
154	case OBRa:
155	case OBRb:
156	case OBRc:
157	case SI:
158	case SIa:
159	case OMa:
160	case OMb:
161	case OMc: fprintf (stream, "\t%s, %d", name, (inst >> 4) & 0x1F); break;
162	case I7: fprintf (stream, "\t%s, %d", name, (inst >> 4) & 0x7F); break;
163	case LS: fprintf (stream, "\t%s, (%s, %d)", grname[(inst >> 8) & 0xF],
164	name, ((inst >> 4) & 0xF) << isiz[(inst >> 13) & 3]);
165	break;
166
167	case BR:
168	{
169	long val = inst & 0x3FF;
170
171	if (inst & 0x400)
172	val \|= 0xFFFFFC00;
173
174	fprintf (stream, "\t0x%x", memaddr + 2 + (val<<1));
175
176	if (strcmp (op->name, "bsr") == 0)
177	{
178	/* for bsr, we'll try to get a symbol for the target */
179	val = memaddr + 2 + (val << 1);
180
181	if (info->print_address_func && val != 0)
182	{
183	fprintf (stream, "\t// ");
184	info->print_address_func (val, info);
185	}
186	}
187	}
188	break;
189
190	case BL:
191	{
192	long val;
193	val = (inst & 0x000F);
194	fprintf (stream, "\t%s, 0x%x",
195	grname[(inst >> 4) & 0xF], memaddr - (val << 1));
196	}
197	break;
198
199	case LR:
200	{
201	unsigned long val;
202
203	val = (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC;
204
205	status = info->read_memory_func (val, ibytes, 4, info);
206	if (status != 0)
207	{
208	info->memory_error_func (status, memaddr, info);
209	break;
210	}
211
212	/* start-sanitize-m340 */
213	if (info->endian == BFD_ENDIAN_LITTLE)
214	val = (ibytes[3] << 24) \| (ibytes[2] << 16)
215	\| (ibytes[1] << 8) \| (ibytes[0]);
216	else
217	/* end-sanitize-m340 */
218	val = (ibytes[0] << 24) \| (ibytes[1] << 16)
219	\| (ibytes[2] << 8) \| (ibytes[3]);
220
221	/* Removed [] around literal value to match ABI syntax 12/95. */
222	fprintf (stream, "\t%s, 0x%X", grname[(inst >> 8) & 0xF], val);
223
224	if (val == 0)
225	fprintf (stream, "\t// from address pool at 0x%x",
226	(memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC);
227	}
228	break;
229
230	case LJ:
231	{
232	unsigned long val;
233
234	val = (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC;
235
236	status = info->read_memory_func (val, ibytes, 4, info);
237	if (status != 0)
238	{
239	info->memory_error_func (status, memaddr, info);
240	break;
241	}
242
243	/* start-sanitize-m340 */
244	if (info->endian == BFD_ENDIAN_LITTLE)
245	val = (ibytes[3] << 24) \| (ibytes[2] << 16)
246	\| (ibytes[1] << 8) \| (ibytes[0]);
247	else
248	/* end-sanitize-m340 */
249	val = (ibytes[0] << 24) \| (ibytes[1] << 16)
250	\| (ibytes[2] << 8) \| (ibytes[3]);
251
252	/* Removed [] around literal value to match ABI syntax 12/95. */
253	fprintf (stream, "\t0x%X", val);
254	/* For jmpi/jsri, we'll try to get a symbol for the target. */
255	if (info->print_address_func && val != 0)
256	{
257	fprintf (stream, "\t// ");
258	info->print_address_func (val, info);
259	}
260	else
261	{
262	fprintf (stream, "\t// from address pool at 0x%x",
263	(memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC);
264	}
265	}
266	break;
267
268	default:
269	/* if the disassembler lags the instruction set */
270	fprintf (stream, "\tundecoded operands, inst is 0x%04x", inst);
271	break;
272	}
273	}
274
275	/* Say how many bytes we consumed? */
276	return 2;
277	}