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

/* Disassemble Motorola M*Core instructions.
   Copyright 1993, 1999, 2000, 2001, 2002 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */

#include "sysdep.h"
#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  */ 0xFE00,
    /* 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,

  /* MULSH */ 0xFF00,
  /* OPSR  */ 0xFFF8,   /* psrset/psrclr */

    /* 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;
  const 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;
    }

  if (info->endian == BFD_ENDIAN_BIG)
    inst = (ibytes[0] << 8) | ibytes[1];
  else if (info->endian == BFD_ENDIAN_LITTLE)
    inst = (ibytes[1] << 8) | ibytes[0];
  else
    abort ();

  /* 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, ".short 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;

	case MULSH:
	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%lx", (long)(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%lx",
		     grname[(inst >> 4) & 0xF], (long)(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;
	      }

	    if (info->endian == BFD_ENDIAN_LITTLE)
	      val = (ibytes[3] << 24) | (ibytes[2] << 16)
		| (ibytes[1] << 8) | (ibytes[0]);
	    else
	      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%lX", grname[(inst >> 8) & 0xF], val);

	    if (val == 0)
	      fprintf (stream, "\t// from address pool at 0x%lx",
		       (long)(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;
	      }

	    if (info->endian == BFD_ENDIAN_LITTLE)
	      val = (ibytes[3] << 24) | (ibytes[2] << 16)
		| (ibytes[1] << 8) | (ibytes[0]);
	    else
	      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%lX", 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%lx",
			 (long)(memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC);
	      }
	  }
	  break;

	case OPSR:
	  {
	    static char *fields[] = {
	      "af", "ie",    "fe",    "fe,ie",
	      "ee", "ee,ie", "ee,fe", "ee,fe,ie"
	    };

	    fprintf (stream, "\t%s", fields[inst & 0x7]);
	  }
	  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
3442f309	1	/* Disassemble Motorola M*Core instructions.
aef6203b	2	Copyright 1993, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
3f230321 NC	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
f4321104	16	Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
3f230321	17
0d8dfecf	18	#include "sysdep.h"
3f230321 NC	19	#include <stdio.h>
	20	#define STATIC_TABLE
	21	#define DEFINE_TABLE
	22
	23	#include "mcore-opc.h"
	24	#include "dis-asm.h"
	25
9cac79d3	26	/* Mask for each mcore_opclass: */
7f6621cd	27	static const unsigned short imsk[] = {
9cac79d3 NC	28	/* O0 */ 0xFFFF,
	29	/* OT */ 0xFFFC,
	30	/* O1 */ 0xFFF0,
710c2d97	31	/* OC */ 0xFE00,
9cac79d3 NC	32	/* O2 */ 0xFF00,
	33	/* X1 */ 0xFFF0,
	34	/* OI */ 0xFE00,
	35	/* OB */ 0xFE00,
7f6621cd	36
9cac79d3 NC	37	/* OMa */ 0xFFF0,
	38	/* SI */ 0xFE00,
	39	/* I7 */ 0xF800,
	40	/* LS */ 0xF000,
	41	/* BR */ 0xF800,
	42	/* BL */ 0xFF00,
	43	/* LR */ 0xF000,
	44	/* LJ */ 0xFF00,
7f6621cd	45
9cac79d3 NC	46	/* RM */ 0xFFF0,
	47	/* RQ */ 0xFFF0,
	48	/* JSR */ 0xFFF0,
	49	/* JMP */ 0xFFF0,
	50	/* OBRa*/ 0xFFF0,
	51	/* OBRb*/ 0xFF80,
	52	/* OBRc*/ 0xFF00,
	53	/* OBR2*/ 0xFE00,
7f6621cd	54
9cac79d3 NC	55	/* O1R1*/ 0xFFF0,
	56	/* OMb */ 0xFF80,
	57	/* OMc */ 0xFF00,
	58	/* SIa */ 0xFE00,
	59
7f6621cd	60	/* MULSH */ 0xFF00,
97ee9b94	61	/* OPSR / 0xFFF8, / psrset/psrclr */
7f6621cd	62
3f230321 NC	63	/* JC / 0, / JC,JU,JL don't appear in object */
	64	/* JU */ 0,
	65	/* JL */ 0,
	66	/* RSI */ 0,
	67	/* DO21*/ 0,
7f6621cd	68	/* OB2 / 0 / OB2 won't appear in object. */
3f230321 NC	69	};
3f230321 NC	70
7f6621cd	71	static const char *grname[] = {
3f230321 NC	72	"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
	73	"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
	74	};
	75
	76	static const char X[] = "??";
	77
7f6621cd	78	static const char *crname[] = {
3f230321 NC	79	"psr", "vbr", "epsr", "fpsr", "epc", "fpc", "ss0", "ss1",
	80	"ss2", "ss3", "ss4", "gcr", "gsr", X, X, X,
	81	X, X, X, X, X, X, X, X,
	82	X, X, X, X, X, X, X, X
	83	};
	84
	85	static const unsigned isiz[] = { 2, 0, 1, 0 };
	86
7f6621cd	87	int
3f230321 NC	88	print_insn_mcore (memaddr, info)
3f230321 NC	89	bfd_vma memaddr;
7f6621cd	90	struct disassemble_info *info;
3f230321	91	{
6a51a8a8 AM	92	unsigned char ibytes[4];
	93	fprintf_ftype fprintf = info->fprintf_func;
	94	void *stream = info->stream;
	95	unsigned short inst;
	96	const mcore_opcode_info *op;
	97	int status;
3f230321 NC	98
	99	info->bytes_per_chunk = 2;
	100
	101	status = info->read_memory_func (memaddr, ibytes, 2, info);
	102
7f6621cd	103	if (status != 0)
3f230321 NC	104	{
	105	info->memory_error_func (status, memaddr, info);
	106	return -1;
	107	}
	108
97ee9b94	109	if (info->endian == BFD_ENDIAN_BIG)
3f230321	110	inst = (ibytes[0] << 8) \| ibytes[1];
97ee9b94 NC	111	else if (info->endian == BFD_ENDIAN_LITTLE)
	112	inst = (ibytes[1] << 8) \| ibytes[0];
	113	else
	114	abort ();
3f230321 NC	115
3f230321 NC	116	/* Just a linear search of the table. */
7f6621cd	117	for (op = mcore_table; op->name != 0; op++)
3f230321 NC	118	if (op->inst == (inst & imsk[op->opclass]))
	119	break;
	120
	121	if (op->name == 0)
88685153	122	fprintf (stream, ".short 0x%04x", inst);
3f230321 NC	123	else
3f230321 NC	124	{
7f6621cd KH	125	const char *name = grname[inst & 0x0F];
7f6621cd KH	126
3f230321	127	fprintf (stream, "%s", op->name);
7f6621cd	128
3f230321 NC	129	switch (op->opclass)
3f230321 NC	130	{
6a51a8a8 AM	131	case O0:
	132	break;
	133
	134	case OT:
	135	fprintf (stream, "\t%d", inst & 0x3);
	136	break;
	137
3f230321 NC	138	case O1:
3f230321 NC	139	case JMP:
6a51a8a8 AM	140	case JSR:
	141	fprintf (stream, "\t%s", name);
	142	break;
	143
	144	case OC:
	145	fprintf (stream, "\t%s, %s", name, crname[(inst >> 4) & 0x1F]);
	146	break;
	147
	148	case O1R1:
	149	fprintf (stream, "\t%s, r1", name);
	150	break;
	151
97ee9b94	152	case MULSH:
6a51a8a8 AM	153	case O2:
	154	fprintf (stream, "\t%s, %s", name, grname[(inst >> 4) & 0xF]);
	155	break;
	156
	157	case X1:
	158	fprintf (stream, "\tr1, %s", name);
	159	break;
	160
	161	case OI:
	162	fprintf (stream, "\t%s, %d", name, ((inst >> 4) & 0x1F) + 1);
	163	break;
	164
	165	case RM:
	166	fprintf (stream, "\t%s-r15, (r0)", name);
	167	break;
	168
	169	case RQ:
	170	fprintf (stream, "\tr4-r7, (%s)", name);
	171	break;
	172
3f230321 NC	173	case OB:
	174	case OBRa:
	175	case OBRb:
	176	case OBRc:
	177	case SI:
	178	case SIa:
	179	case OMa:
	180	case OMb:
6a51a8a8 AM	181	case OMc:
	182	fprintf (stream, "\t%s, %d", name, (inst >> 4) & 0x1F);
	183	break;
	184
	185	case I7:
	186	fprintf (stream, "\t%s, %d", name, (inst >> 4) & 0x7F);
	187	break;
	188
	189	case LS:
	190	fprintf (stream, "\t%s, (%s, %d)", grname[(inst >> 8) & 0xF],
	191	name, ((inst >> 4) & 0xF) << isiz[(inst >> 13) & 3]);
3f230321	192	break;
7f6621cd	193
3f230321 NC	194	case BR:
	195	{
	196	long val = inst & 0x3FF;
7f6621cd	197
3f230321 NC	198	if (inst & 0x400)
3f230321 NC	199	val \|= 0xFFFFFC00;
7f6621cd	200
0fd3a477	201	fprintf (stream, "\t0x%lx", (long)(memaddr + 2 + (val << 1)));
7f6621cd	202
3f230321 NC	203	if (strcmp (op->name, "bsr") == 0)
3f230321 NC	204	{
c1485d85	205	/* For bsr, we'll try to get a symbol for the target. */
3f230321	206	val = memaddr + 2 + (val << 1);
7f6621cd	207
3f230321 NC	208	if (info->print_address_func && val != 0)
	209	{
	210	fprintf (stream, "\t// ");
	211	info->print_address_func (val, info);
	212	}
	213	}
	214	}
	215	break;
7f6621cd	216
3f230321 NC	217	case BL:
	218	{
	219	long val;
	220	val = (inst & 0x000F);
0fd3a477 JW	221	fprintf (stream, "\t%s, 0x%lx",
0fd3a477 JW	222	grname[(inst >> 4) & 0xF], (long)(memaddr - (val << 1)));
3f230321 NC	223	}
3f230321 NC	224	break;
7f6621cd	225
3f230321 NC	226	case LR:
	227	{
	228	unsigned long val;
7f6621cd	229
3f230321	230	val = (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC;
7f6621cd	231
3f230321	232	status = info->read_memory_func (val, ibytes, 4, info);
7f6621cd	233	if (status != 0)
3f230321 NC	234	{
	235	info->memory_error_func (status, memaddr, info);
	236	break;
	237	}
7f6621cd	238
97ee9b94 NC	239	if (info->endian == BFD_ENDIAN_LITTLE)
	240	val = (ibytes[3] << 24) \| (ibytes[2] << 16)
	241	\| (ibytes[1] << 8) \| (ibytes[0]);
	242	else
3f230321 NC	243	val = (ibytes[0] << 24) \| (ibytes[1] << 16)
3f230321 NC	244	\| (ibytes[2] << 8) \| (ibytes[3]);
7f6621cd	245
3f230321	246	/* Removed [] around literal value to match ABI syntax 12/95. */
0fd3a477	247	fprintf (stream, "\t%s, 0x%lX", grname[(inst >> 8) & 0xF], val);
3f230321 NC	248
3f230321 NC	249	if (val == 0)
0fd3a477 JW	250	fprintf (stream, "\t// from address pool at 0x%lx",
0fd3a477 JW	251	(long)(memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC);
3f230321 NC	252	}
3f230321 NC	253	break;
7f6621cd	254
3f230321 NC	255	case LJ:
	256	{
	257	unsigned long val;
7f6621cd	258
3f230321	259	val = (memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC;
7f6621cd	260
3f230321	261	status = info->read_memory_func (val, ibytes, 4, info);
7f6621cd	262	if (status != 0)
3f230321 NC	263	{
	264	info->memory_error_func (status, memaddr, info);
	265	break;
	266	}
	267
97ee9b94 NC	268	if (info->endian == BFD_ENDIAN_LITTLE)
	269	val = (ibytes[3] << 24) \| (ibytes[2] << 16)
	270	\| (ibytes[1] << 8) \| (ibytes[0]);
	271	else
3f230321 NC	272	val = (ibytes[0] << 24) \| (ibytes[1] << 16)
3f230321 NC	273	\| (ibytes[2] << 8) \| (ibytes[3]);
7f6621cd	274
3f230321	275	/* Removed [] around literal value to match ABI syntax 12/95. */
0fd3a477	276	fprintf (stream, "\t0x%lX", val);
3f230321 NC	277	/* For jmpi/jsri, we'll try to get a symbol for the target. */
	278	if (info->print_address_func && val != 0)
	279	{
	280	fprintf (stream, "\t// ");
	281	info->print_address_func (val, info);
	282	}
	283	else
	284	{
0fd3a477 JW	285	fprintf (stream, "\t// from address pool at 0x%lx",
0fd3a477 JW	286	(long)(memaddr + 2 + ((inst & 0xFF) << 2)) & 0xFFFFFFFC);
3f230321 NC	287	}
	288	}
	289	break;
7f6621cd	290
97ee9b94 NC	291	case OPSR:
97ee9b94 NC	292	{
7f6621cd KH	293	static char *fields[] = {
7f6621cd KH	294	"af", "ie", "fe", "fe,ie",
97ee9b94 NC	295	"ee", "ee,ie", "ee,fe", "ee,fe,ie"
97ee9b94 NC	296	};
7f6621cd	297
97ee9b94 NC	298	fprintf (stream, "\t%s", fields[inst & 0x7]);
	299	}
	300	break;
7f6621cd	301
3f230321	302	default:
c1485d85	303	/* If the disassembler lags the instruction set. */
3f230321 NC	304	fprintf (stream, "\tundecoded operands, inst is 0x%04x", inst);
	305	break;
	306	}
	307	}
7f6621cd	308
c1485d85	309	/* Say how many bytes we consumed. */
3f230321 NC	310	return 2;
3f230321 NC	311	}