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e05cae190b
a two byte insn at the end of a memory region when the memory
region's size is only two byte aligned.
145 lines
4.2 KiB
C
145 lines
4.2 KiB
C
/* Disassemble V850 instructions.
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Copyright (C) 1996 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include <stdio.h>
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#include "ansidecl.h"
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#include "opcode/v850.h"
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#include "dis-asm.h"
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static const char *const v850_reg_names[] =
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{ "r0", "r1", "r2", "sp", "gp", "r5", "r6", "r7",
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
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"r24", "r25", "r26", "r27", "r28", "r29", "ep", "r31" };
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static const char *const v850_sreg_names[] =
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{ "eipc", "eipsw", "fepc", "fepsw", "ecr", "psw", "sr6", "sr7",
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"sr8", "sr9", "sr10", "sr11", "sr12", "sr13", "sr14", "sr15",
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"sr16", "sr17", "sr18", "sr19", "sr20", "sr21", "sr22", "sr23",
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"sr24", "sr25", "sr26", "sr27", "sr28", "sr29", "sr30", "sr31" };
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static const char *const v850_cc_names[] =
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{ "v", "c/l", "z", "nh", "s/n", "t", "lt", "le",
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"nv", "nc/nl", "nz", "h", "ns/p", "sa", "ge", "gt" };
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int
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print_insn_v850 (memaddr, info)
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bfd_vma memaddr;
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struct disassemble_info *info;
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{
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int status;
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bfd_byte buffer[4];
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unsigned long insn;
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/* First figure out how big the opcode is. */
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status = (*info->read_memory_func) (memaddr, buffer, 2, info);
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if (status != 0)
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{
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(*info->memory_error_func) (status, memaddr, info);
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return -1;
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}
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insn = bfd_getl16 (buffer);
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/* If this is a 4 byte insn, read 4 bytes of stuff. */
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if ((insn & 0x0600) == 0x0600)
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{
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status = (*info->read_memory_func) (memaddr, buffer, 2, info);
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if (status != 0)
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{
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(*info->memory_error_func) (status, memaddr, info);
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return -1;
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}
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insn = bfd_getl32 (buffer);
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}
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disassemble (insn, info);
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/* Make sure we tell our caller how many bytes we consumed. */
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if ((insn & 0x0600) == 0x0600)
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return 4;
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else
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return 2;
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}
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disassemble (insn, info)
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unsigned long insn;
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struct disassemble_info *info;
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{
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struct v850_opcode *op = (struct v850_opcode *)v850_opcodes;
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const struct v850_operand *operand;
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int match = 0;
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/* If this is a two byte insn, then mask off the high bits. */
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if ((insn & 0x0600) != 0x0600)
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insn &= 0xffff;
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/* Find the opcode. */
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while (op->name)
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{
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if ((op->mask & insn) == op->opcode)
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{
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const unsigned char *opindex_ptr;
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match = 1;
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(*info->fprintf_func) (info->stream, "%s\t", op->name);
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/* Now print the operands. */
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for (opindex_ptr = op->operands; *opindex_ptr != 0; opindex_ptr++)
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{
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unsigned long value;
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operand = &v850_operands[*opindex_ptr];
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if (operand->extract)
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value = (operand->extract) (insn, 0);
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else
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value = (insn >> operand->shift) & ((1 << operand->bits) - 1);
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if ((operand->flags & V850_OPERAND_SIGNED) != 0)
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value = ((signed long)(value << (32 - operand->bits))
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>> (32 - operand->bits));
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if ((operand->flags & V850_OPERAND_REG) != 0)
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(*info->fprintf_func) (info->stream, "%s",
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v850_reg_names[value]);
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else if ((operand->flags & V850_OPERAND_SRG) != 0)
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(*info->fprintf_func) (info->stream, "%s",
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v850_sreg_names[value]);
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else if ((operand->flags & V850_OPERAND_CC) != 0)
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(*info->fprintf_func) (info->stream, "%s",
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v850_cc_names[value]);
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else if ((operand->flags & V850_OPERAND_EP) != 0)
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(*info->fprintf_func) (info->stream, "ep");
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else
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(*info->fprintf_func) (info->stream, "%d", value);
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}
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/* All done. */
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break;
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}
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op++;
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}
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if (!match)
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{
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if ((insn & 0x0600) != 0x0600)
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(*info->fprintf_func) (info->stream, ".short\t0x%04x", insn);
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else
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(*info->fprintf_func) (info->stream, ".long\t0x%08x", insn);
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}
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}
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