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markom |
/* ia64-dis.c -- Disassemble ia64 instructions
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Copyright 1998, 1999, 2000 Free Software Foundation, Inc.
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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This file is part of GDB, GAS, and the GNU binutils.
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GDB, GAS, and the GNU binutils are free software; you can redistribute
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them and/or modify them under the terms of the GNU General Public
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License as published by the Free Software Foundation; either version
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2, or (at your option) any later version.
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GDB, GAS, and the GNU binutils are distributed in the hope that they
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will be useful, but WITHOUT ANY WARRANTY; without even the implied
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warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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the 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 file; see the file COPYING. If not, write to the
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Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#include <assert.h>
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#include <string.h>
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#include "dis-asm.h"
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#include "opcode/ia64.h"
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#define NELEMS(a) ((int) (sizeof (a) / sizeof (a[0])))
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/* Disassemble ia64 instruction. */
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/* Return the instruction type for OPCODE found in unit UNIT. */
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static enum ia64_insn_type
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unit_to_type (ia64_insn opcode, enum ia64_unit unit)
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{
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enum ia64_insn_type type;
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int op;
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op = IA64_OP (opcode);
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if (op >= 8 && (unit == IA64_UNIT_I || unit == IA64_UNIT_M))
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{
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type = IA64_TYPE_A;
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}
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else
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{
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switch (unit)
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{
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case IA64_UNIT_I:
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type = IA64_TYPE_I; break;
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case IA64_UNIT_M:
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type = IA64_TYPE_M; break;
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case IA64_UNIT_B:
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type = IA64_TYPE_B; break;
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case IA64_UNIT_F:
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type = IA64_TYPE_F; break;
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case IA64_UNIT_L:
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case IA64_UNIT_X:
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type = IA64_TYPE_X; break;
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default:
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type = -1;
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}
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}
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return type;
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}
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int
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print_insn_ia64 (bfd_vma memaddr, struct disassemble_info *info)
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{
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ia64_insn t0, t1, slot[3], template, s_bit, insn;
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int slotnum, j, status, need_comma, retval, slot_multiplier;
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const struct ia64_operand *odesc;
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const struct ia64_opcode *idesc;
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const char *err, *str, *tname;
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BFD_HOST_U_64_BIT value;
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bfd_byte bundle[16];
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enum ia64_unit unit;
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char regname[16];
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if (info->bytes_per_line == 0)
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info->bytes_per_line = 6;
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info->display_endian = info->endian;
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slot_multiplier = info->bytes_per_line;
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retval = slot_multiplier;
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slotnum = (((long) memaddr) & 0xf) / slot_multiplier;
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if (slotnum > 2)
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return -1;
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memaddr -= (memaddr & 0xf);
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status = (*info->read_memory_func) (memaddr, bundle, sizeof (bundle), 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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/* bundles are always in little-endian byte order */
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t0 = bfd_getl64 (bundle);
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t1 = bfd_getl64 (bundle + 8);
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s_bit = t0 & 1;
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template = (t0 >> 1) & 0xf;
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slot[0] = (t0 >> 5) & 0x1ffffffffffLL;
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slot[1] = ((t0 >> 46) & 0x3ffff) | ((t1 & 0x7fffff) << 18);
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slot[2] = (t1 >> 23) & 0x1ffffffffffLL;
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tname = ia64_templ_desc[template].name;
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if (slotnum == 0)
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(*info->fprintf_func) (info->stream, "[%s] ", tname);
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else
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(*info->fprintf_func) (info->stream, " ", tname);
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unit = ia64_templ_desc[template].exec_unit[slotnum];
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if (template == 2 && slotnum == 1)
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{
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/* skip L slot in MLI template: */
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slotnum = 2;
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retval += slot_multiplier;
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}
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insn = slot[slotnum];
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if (unit == IA64_UNIT_NIL)
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goto decoding_failed;
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idesc = ia64_dis_opcode (insn, unit_to_type (insn, unit));
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if (idesc == NULL)
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goto decoding_failed;
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/* print predicate, if any: */
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if ((idesc->flags & IA64_OPCODE_NO_PRED)
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|| (insn & 0x3f) == 0)
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(*info->fprintf_func) (info->stream, " ");
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else
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(*info->fprintf_func) (info->stream, "(p%02d) ", (int)(insn & 0x3f));
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/* now the actual instruction: */
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(*info->fprintf_func) (info->stream, "%s", idesc->name);
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if (idesc->operands[0])
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(*info->fprintf_func) (info->stream, " ");
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need_comma = 0;
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for (j = 0; j < NELEMS (idesc->operands) && idesc->operands[j]; ++j)
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{
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odesc = elf64_ia64_operands + idesc->operands[j];
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if (need_comma)
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(*info->fprintf_func) (info->stream, ",");
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if (odesc - elf64_ia64_operands == IA64_OPND_IMMU64)
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{
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/* special case of 64 bit immediate load: */
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value = ((insn >> 13) & 0x7f) | (((insn >> 27) & 0x1ff) << 7)
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| (((insn >> 22) & 0x1f) << 16) | (((insn >> 21) & 0x1) << 21)
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| (slot[1] << 22) | (((insn >> 36) & 0x1) << 63);
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}
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else if (odesc - elf64_ia64_operands == IA64_OPND_IMMU62)
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{
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/* 62-bit immediate for nop.x/break.x */
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value = ((slot[1] & 0x1ffffffffffLL) << 21)
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| (((insn >> 36) & 0x1) << 20)
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| ((insn >> 6) & 0xfffff);
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}
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else if (odesc - elf64_ia64_operands == IA64_OPND_TGT64)
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{
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/* 60-bit immedate for long branches. */
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value = (((insn >> 13) & 0xfffff)
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| (((insn >> 36) & 1) << 59)
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| (slot[1] << 20)) << 4;
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}
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else
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{
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err = (*odesc->extract) (odesc, insn, &value);
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if (err)
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{
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(*info->fprintf_func) (info->stream, "%s", err);
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goto done;
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}
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}
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switch (odesc->class)
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{
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case IA64_OPND_CLASS_CST:
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(*info->fprintf_func) (info->stream, "%s", odesc->str);
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break;
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case IA64_OPND_CLASS_REG:
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if (odesc->str[0] == 'a' && odesc->str[1] == 'r')
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{
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switch (value)
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{
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case 0: case 1: case 2: case 3:
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case 4: case 5: case 6: case 7:
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sprintf (regname, "ar.k%u", (unsigned int) value);
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break;
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case 16: strcpy (regname, "ar.rsc"); break;
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case 17: strcpy (regname, "ar.bsp"); break;
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case 18: strcpy (regname, "ar.bspstore"); break;
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case 19: strcpy (regname, "ar.rnat"); break;
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case 32: strcpy (regname, "ar.ccv"); break;
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case 36: strcpy (regname, "ar.unat"); break;
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case 40: strcpy (regname, "ar.fpsr"); break;
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case 44: strcpy (regname, "ar.itc"); break;
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case 64: strcpy (regname, "ar.pfs"); break;
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case 65: strcpy (regname, "ar.lc"); break;
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case 66: strcpy (regname, "ar.ec"); break;
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default:
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sprintf (regname, "ar%u", (unsigned int) value);
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break;
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}
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(*info->fprintf_func) (info->stream, "%s", regname);
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}
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else
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(*info->fprintf_func) (info->stream, "%s%d", odesc->str, (int)value);
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break;
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case IA64_OPND_CLASS_IND:
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(*info->fprintf_func) (info->stream, "%s[r%d]", odesc->str, (int)value);
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break;
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case IA64_OPND_CLASS_ABS:
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str = 0;
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if (odesc - elf64_ia64_operands == IA64_OPND_MBTYPE4)
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switch (value)
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{
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case 0x0: str = "@brcst"; break;
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case 0x8: str = "@mix"; break;
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case 0x9: str = "@shuf"; break;
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case 0xa: str = "@alt"; break;
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case 0xb: str = "@rev"; break;
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}
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if (str)
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(*info->fprintf_func) (info->stream, "%s", str);
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else if (odesc->flags & IA64_OPND_FLAG_DECIMAL_SIGNED)
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(*info->fprintf_func) (info->stream, "%lld", value);
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else if (odesc->flags & IA64_OPND_FLAG_DECIMAL_UNSIGNED)
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(*info->fprintf_func) (info->stream, "%llu", value);
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else
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(*info->fprintf_func) (info->stream, "0x%llx", value);
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break;
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case IA64_OPND_CLASS_REL:
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(*info->print_address_func) (memaddr + value, info);
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break;
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}
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need_comma = 1;
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if (j + 1 == idesc->num_outputs)
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{
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(*info->fprintf_func) (info->stream, "=");
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need_comma = 0;
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}
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}
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if (slotnum + 1 == ia64_templ_desc[template].group_boundary
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|| ((slotnum == 2) && s_bit))
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(*info->fprintf_func) (info->stream, ";;");
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| 263 |
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done:
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| 264 |
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ia64_free_opcode ((struct ia64_opcode *)idesc);
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failed:
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if (slotnum == 2)
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retval += 16 - 3*slot_multiplier;
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| 268 |
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return retval;
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| 270 |
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decoding_failed:
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| 271 |
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(*info->fprintf_func) (info->stream, " data8 %#011llx", insn);
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goto failed;
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}
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