97d40d3d4a
us up to version 2.17.50.20070703, at the last GPLv2 commit. Amongst others, this added upstream support for some FreeBSD-specific things that we previously had to manually hack in, such as the OSABI label support, and so on. There are also quite a number of new files, some for cpu's (e.g. SPU) that we may or may not be interested in, but those can be cleaned up later on, if needed.
261 lines
7.2 KiB
C
261 lines
7.2 KiB
C
/* Disassemble SPU instructions
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Copyright 2006 Free Software Foundation, Inc.
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This file is part of GDB, GAS, and the GNU binutils.
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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 along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
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#include <stdio.h>
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#include "sysdep.h"
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#include "dis-asm.h"
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#include "opcode/spu.h"
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/* This file provides a disassembler function which uses
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the disassembler interface defined in dis-asm.h. */
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extern const struct spu_opcode spu_opcodes[];
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extern const int spu_num_opcodes;
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static const struct spu_opcode *spu_disassemble_table[(1<<11)];
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static void
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init_spu_disassemble (void)
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{
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int i;
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/* If two instructions have the same opcode then we prefer the first
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* one. In most cases it is just an alternate mnemonic. */
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for (i = 0; i < spu_num_opcodes; i++)
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{
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int o = spu_opcodes[i].opcode;
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if (o >= (1 << 11))
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abort ();
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if (spu_disassemble_table[o] == 0)
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spu_disassemble_table[o] = &spu_opcodes[i];
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}
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}
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/* Determine the instruction from the 10 least significant bits. */
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static const struct spu_opcode *
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get_index_for_opcode (unsigned int insn)
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{
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const struct spu_opcode *index;
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unsigned int opcode = insn >> (32-11);
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/* Init the table. This assumes that element 0/opcode 0 (currently
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* NOP) is always used */
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if (spu_disassemble_table[0] == 0)
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init_spu_disassemble ();
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if ((index = spu_disassemble_table[opcode & 0x780]) != 0
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&& index->insn_type == RRR)
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return index;
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if ((index = spu_disassemble_table[opcode & 0x7f0]) != 0
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&& (index->insn_type == RI18 || index->insn_type == LBT))
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return index;
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if ((index = spu_disassemble_table[opcode & 0x7f8]) != 0
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&& index->insn_type == RI10)
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return index;
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if ((index = spu_disassemble_table[opcode & 0x7fc]) != 0
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&& (index->insn_type == RI16))
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return index;
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if ((index = spu_disassemble_table[opcode & 0x7fe]) != 0
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&& (index->insn_type == RI8))
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return index;
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if ((index = spu_disassemble_table[opcode & 0x7ff]) != 0)
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return index;
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return 0;
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}
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/* Print a Spu instruction. */
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int
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print_insn_spu (bfd_vma memaddr, struct disassemble_info *info)
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{
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bfd_byte buffer[4];
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int value;
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int hex_value;
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int status;
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unsigned int insn;
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const struct spu_opcode *index;
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enum spu_insns tag;
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status = (*info->read_memory_func) (memaddr, buffer, 4, 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_getb32 (buffer);
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index = get_index_for_opcode (insn);
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if (index == 0)
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{
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(*info->fprintf_func) (info->stream, ".long 0x%x", insn);
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}
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else
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{
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int i;
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int paren = 0;
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tag = (enum spu_insns)(index - spu_opcodes);
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(*info->fprintf_func) (info->stream, "%s", index->mnemonic);
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if (tag == M_BI || tag == M_BISL || tag == M_IRET || tag == M_BISLED
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|| tag == M_BIHNZ || tag == M_BIHZ || tag == M_BINZ || tag == M_BIZ
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|| tag == M_SYNC || tag == M_HBR)
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{
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int fb = (insn >> (32-18)) & 0x7f;
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if (fb & 0x40)
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(*info->fprintf_func) (info->stream, tag == M_SYNC ? "c" : "p");
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if (fb & 0x20)
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(*info->fprintf_func) (info->stream, "d");
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if (fb & 0x10)
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(*info->fprintf_func) (info->stream, "e");
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}
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if (index->arg[0] != 0)
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(*info->fprintf_func) (info->stream, "\t");
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hex_value = 0;
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for (i = 1; i <= index->arg[0]; i++)
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{
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int arg = index->arg[i];
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if (arg != A_P && !paren && i > 1)
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(*info->fprintf_func) (info->stream, ",");
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switch (arg)
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{
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case A_T:
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(*info->fprintf_func) (info->stream, "$%d",
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DECODE_INSN_RT (insn));
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break;
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case A_A:
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(*info->fprintf_func) (info->stream, "$%d",
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DECODE_INSN_RA (insn));
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break;
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case A_B:
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(*info->fprintf_func) (info->stream, "$%d",
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DECODE_INSN_RB (insn));
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break;
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case A_C:
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(*info->fprintf_func) (info->stream, "$%d",
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DECODE_INSN_RC (insn));
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break;
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case A_S:
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(*info->fprintf_func) (info->stream, "$sp%d",
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DECODE_INSN_RA (insn));
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break;
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case A_H:
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(*info->fprintf_func) (info->stream, "$ch%d",
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DECODE_INSN_RA (insn));
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break;
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case A_P:
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paren++;
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(*info->fprintf_func) (info->stream, "(");
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break;
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case A_U7A:
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(*info->fprintf_func) (info->stream, "%d",
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173 - DECODE_INSN_U8 (insn));
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break;
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case A_U7B:
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(*info->fprintf_func) (info->stream, "%d",
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155 - DECODE_INSN_U8 (insn));
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break;
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case A_S3:
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case A_S6:
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case A_S7:
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case A_S7N:
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case A_U3:
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case A_U5:
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case A_U6:
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case A_U7:
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hex_value = DECODE_INSN_I7 (insn);
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(*info->fprintf_func) (info->stream, "%d", hex_value);
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break;
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case A_S11:
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(*info->print_address_func) (memaddr + DECODE_INSN_I9a (insn) * 4,
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info);
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break;
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case A_S11I:
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(*info->print_address_func) (memaddr + DECODE_INSN_I9b (insn) * 4,
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info);
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break;
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case A_S10:
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case A_S10B:
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hex_value = DECODE_INSN_I10 (insn);
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(*info->fprintf_func) (info->stream, "%d", hex_value);
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break;
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case A_S14:
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hex_value = DECODE_INSN_I10 (insn) * 16;
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(*info->fprintf_func) (info->stream, "%d", hex_value);
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break;
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case A_S16:
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hex_value = DECODE_INSN_I16 (insn);
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(*info->fprintf_func) (info->stream, "%d", hex_value);
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break;
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case A_X16:
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hex_value = DECODE_INSN_U16 (insn);
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(*info->fprintf_func) (info->stream, "%u", hex_value);
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break;
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case A_R18:
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value = DECODE_INSN_I16 (insn) * 4;
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if (value == 0)
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(*info->fprintf_func) (info->stream, "%d", value);
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else
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{
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hex_value = memaddr + value;
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(*info->print_address_func) (hex_value & 0x3ffff, info);
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}
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break;
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case A_S18:
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value = DECODE_INSN_U16 (insn) * 4;
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if (value == 0)
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(*info->fprintf_func) (info->stream, "%d", value);
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else
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(*info->print_address_func) (value, info);
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break;
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case A_U18:
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value = DECODE_INSN_U18 (insn);
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if (value == 0 || !(*info->symbol_at_address_func)(0, info))
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{
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hex_value = value;
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(*info->fprintf_func) (info->stream, "%u", value);
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}
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else
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(*info->print_address_func) (value, info);
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break;
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case A_U14:
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hex_value = DECODE_INSN_U14 (insn);
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(*info->fprintf_func) (info->stream, "%u", hex_value);
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break;
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}
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if (arg != A_P && paren)
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{
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(*info->fprintf_func) (info->stream, ")");
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paren--;
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}
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}
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if (hex_value > 16)
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(*info->fprintf_func) (info->stream, "\t# %x", hex_value);
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}
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return 4;
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}
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