77d66e7b30
PR target/20150 * msp430-dis.c (msp430dis_read_two_bytes): New function. (msp430dis_opcode_unsigned): New function. (msp430dis_opcode_signed): New function. (msp430_singleoperand): Use the new opcode reading functions. Only disassenmble bytes if they were successfully read. (msp430_doubleoperand): Likewise. (msp430_branchinstr): Likewise. (msp430x_callx_instr): Likewise. (print_insn_msp430): Check that it is safe to read bytes before attempting disassembly. Use the new opcode reading functions.
1356 lines
29 KiB
C
1356 lines
29 KiB
C
/* Disassemble MSP430 instructions.
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Copyright (C) 2002-2016 Free Software Foundation, Inc.
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Contributed by Dmitry Diky <diwil@mail.ru>
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This file is part of the GNU opcodes library.
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This library 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 3, or (at your option)
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any later version.
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It is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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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., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include <stdio.h>
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#include <ctype.h>
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#include <sys/types.h>
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#include <errno.h>
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#include "dis-asm.h"
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#include "opintl.h"
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#include "libiberty.h"
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#define DASM_SECTION
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#include "opcode/msp430.h"
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#undef DASM_SECTION
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#define PS(x) (0xffff & (x))
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static bfd_boolean
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msp430dis_read_two_bytes (bfd_vma addr,
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disassemble_info * info,
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bfd_byte * buffer,
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char * comm)
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{
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int status;
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status = info->read_memory_func (addr, buffer, 2, info);
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if (status == 0)
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return TRUE;
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/* PR 20150: A status of EIO means that there were no more bytes left
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to read in the current section. This can happen when disassembling
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interrupt vectors for example. Avoid cluttering the output with
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unhelpful error messages in this case. */
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if (status == EIO)
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{
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if (comm)
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sprintf (comm, _("Warning: disassembly unreliable - not enough bytes available"));
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}
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else
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{
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info->memory_error_func (status, addr, info);
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if (comm)
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sprintf (comm, _("Error: read from memory failed"));
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}
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return FALSE;
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}
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static bfd_boolean
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msp430dis_opcode_unsigned (bfd_vma addr,
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disassemble_info * info,
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unsigned short * return_val,
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char * comm)
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{
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bfd_byte buffer[2];
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if (msp430dis_read_two_bytes (addr, info, buffer, comm))
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{
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* return_val = bfd_getl16 (buffer);
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return TRUE;
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}
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else
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{
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* return_val = 0;
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return FALSE;
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}
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}
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static bfd_boolean
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msp430dis_opcode_signed (bfd_vma addr,
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disassemble_info * info,
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signed int * return_val,
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char * comm)
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{
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bfd_byte buffer[2];
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if (msp430dis_read_two_bytes (addr, info, buffer, comm))
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{
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int status;
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status = bfd_getl_signed_16 (buffer);
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if (status & 0x8000)
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status |= -1U << 16;
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* return_val = status;
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return TRUE;
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}
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else
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{
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* return_val = 0;
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return FALSE;
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}
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}
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static int
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msp430_nooperands (struct msp430_opcode_s *opcode,
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bfd_vma addr ATTRIBUTE_UNUSED,
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unsigned short insn ATTRIBUTE_UNUSED,
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char *comm,
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int *cycles)
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{
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/* Pop with constant. */
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if (insn == 0x43b2)
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return 0;
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if (insn == opcode->bin_opcode)
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return 2;
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if (opcode->fmt == 0)
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{
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if ((insn & 0x0f00) != 0x0300 || (insn & 0x0f00) != 0x0200)
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return 0;
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strcpy (comm, "emulated...");
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*cycles = 1;
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}
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else
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{
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strcpy (comm, "return from interupt");
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*cycles = 5;
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}
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return 2;
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}
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static int
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print_as2_reg_name (int regno, char * op1, char * comm1,
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int c2, int c3, int cd)
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{
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switch (regno)
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{
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case 2:
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sprintf (op1, "#4");
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sprintf (comm1, "r2 As==10");
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return c2;
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case 3:
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sprintf (op1, "#2");
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sprintf (comm1, "r3 As==10");
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return c3;
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default:
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/* Indexed register mode @Rn. */
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sprintf (op1, "@r%d", regno);
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return cd;
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}
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}
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static int
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print_as3_reg_name (int regno, char * op1, char * comm1,
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int c2, int c3, int cd)
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{
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switch (regno)
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{
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case 2:
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sprintf (op1, "#8");
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sprintf (comm1, "r2 As==11");
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return c2;
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case 3:
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sprintf (op1, "#-1");
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sprintf (comm1, "r3 As==11");
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return c3;
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default:
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/* Post incremented @Rn+. */
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sprintf (op1, "@r%d+", regno);
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return cd;
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}
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}
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static int
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msp430_singleoperand (disassemble_info *info,
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struct msp430_opcode_s *opcode,
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bfd_vma addr,
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unsigned short insn,
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char *op,
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char *comm,
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unsigned short extension_word,
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int *cycles)
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{
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int regs = 0, regd = 0;
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int ad = 0, as = 0;
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int where = 0;
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int cmd_len = 2;
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int dst = 0;
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int fmt;
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int extended_dst = extension_word & 0xf;
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regd = insn & 0x0f;
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regs = (insn & 0x0f00) >> 8;
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as = (insn & 0x0030) >> 4;
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ad = (insn & 0x0080) >> 7;
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if (opcode->fmt < 0)
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fmt = (- opcode->fmt) - 1;
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else
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fmt = opcode->fmt;
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switch (fmt)
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{
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case 0: /* Emulated work with dst register. */
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if (regs != 2 && regs != 3 && regs != 1)
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return 0;
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/* Check if not clr insn. */
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if (opcode->bin_opcode == 0x4300 && (ad || as))
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return 0;
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/* Check if really inc, incd insns. */
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if ((opcode->bin_opcode & 0xff00) == 0x5300 && as == 3)
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return 0;
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if (ad == 0)
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{
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*cycles = 1;
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/* Register. */
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if (regd == 0)
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{
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*cycles += 1;
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sprintf (op, "r0");
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}
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else if (regd == 1)
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sprintf (op, "r1");
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else if (regd == 2)
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sprintf (op, "r2");
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else
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sprintf (op, "r%d", regd);
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}
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else /* ad == 1 msp430dis_opcode. */
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{
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if (regd == 0)
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{
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/* PC relative. */
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if (msp430dis_opcode_signed (addr + 2, info, &dst, comm))
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{
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cmd_len += 2;
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*cycles = 4;
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sprintf (op, "0x%04x", dst);
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sprintf (comm, "PC rel. abs addr 0x%04x",
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PS ((short) (addr + 2) + dst));
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if (extended_dst)
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{
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dst |= extended_dst << 16;
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sprintf (op, "0x%05x", dst);
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sprintf (comm, "PC rel. abs addr 0x%05lx",
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(long)((addr + 2 + dst) & 0xfffff));
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}
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}
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}
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else if (regd == 2)
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{
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/* Absolute. */
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if (msp430dis_opcode_signed (addr + 2, info, &dst, comm))
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{
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cmd_len += 2;
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*cycles = 4;
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sprintf (op, "&0x%04x", PS (dst));
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if (extended_dst)
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{
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dst |= extended_dst << 16;
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sprintf (op, "&0x%05x", dst & 0xfffff);
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}
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}
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}
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else
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{
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if (msp430dis_opcode_signed (addr + 2, info, &dst, comm))
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{
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cmd_len += 2;
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*cycles = 4;
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if (extended_dst)
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{
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dst |= extended_dst << 16;
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if (dst & 0x80000)
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dst |= -1U << 20;
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}
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sprintf (op, "%d(r%d)", dst, regd);
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}
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}
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}
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break;
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case 2: /* rrc, push, call, swpb, rra, sxt, push, call, reti etc... */
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if (as == 0)
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{
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if (regd == 3)
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{
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/* Constsnts. */
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sprintf (op, "#0");
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sprintf (comm, "r3 As==00");
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}
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else
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{
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/* Register. */
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sprintf (op, "r%d", regd);
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}
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*cycles = 1;
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}
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else if (as == 2)
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{
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* cycles = print_as2_reg_name (regd, op, comm, 1, 1, 3);
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}
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else if (as == 3)
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{
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if (regd == 0)
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{
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*cycles = 3;
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/* absolute. @pc+ */
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if (msp430dis_opcode_signed (addr + 2, info, &dst, comm))
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{
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cmd_len += 2;
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sprintf (op, "#%d", dst);
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if (dst > 9 || dst < 0)
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sprintf (comm, "#0x%04x", PS (dst));
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if (extended_dst)
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{
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dst |= extended_dst << 16;
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if (dst & 0x80000)
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dst |= -1U << 20;
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sprintf (op, "#%d", dst);
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if (dst > 9 || dst < 0)
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sprintf (comm, "#0x%05x", dst);
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}
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}
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}
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else
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* cycles = print_as3_reg_name (regd, op, comm, 1, 1, 3);
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}
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else if (as == 1)
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{
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*cycles = 4;
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if (regd == 0)
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{
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/* PC relative. */
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if (msp430dis_opcode_signed (addr + 2, info, &dst, comm))
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{
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cmd_len += 2;
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sprintf (op, "0x%04x", PS (dst));
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sprintf (comm, "PC rel. 0x%04x",
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PS ((short) addr + 2 + dst));
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if (extended_dst)
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{
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dst |= extended_dst << 16;
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sprintf (op, "0x%05x", dst & 0xffff);
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sprintf (comm, "PC rel. 0x%05lx",
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(long)((addr + 2 + dst) & 0xfffff));
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}
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}
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}
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else if (regd == 2)
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{
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/* Absolute. */
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if (msp430dis_opcode_signed (addr + 2, info, &dst, comm))
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{
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cmd_len += 2;
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sprintf (op, "&0x%04x", PS (dst));
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if (extended_dst)
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{
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dst |= extended_dst << 16;
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sprintf (op, "&0x%05x", dst & 0xfffff);
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}
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}
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}
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else if (regd == 3)
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{
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*cycles = 1;
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sprintf (op, "#1");
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sprintf (comm, "r3 As==01");
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}
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else
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{
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/* Indexed. */
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if (msp430dis_opcode_signed (addr + 2, info, &dst, comm))
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{
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cmd_len += 2;
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if (extended_dst)
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{
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dst |= extended_dst << 16;
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if (dst & 0x80000)
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dst |= -1U << 20;
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}
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sprintf (op, "%d(r%d)", dst, regd);
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if (dst > 9 || dst < 0)
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sprintf (comm, "%05x", dst);
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}
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}
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}
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break;
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case 3: /* Jumps. */
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where = insn & 0x03ff;
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if (where & 0x200)
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where |= ~0x03ff;
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if (where > 512 || where < -511)
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return 0;
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where *= 2;
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sprintf (op, "$%+-8d", where + 2);
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sprintf (comm, "abs 0x%lx", (long) (addr + 2 + where));
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*cycles = 2;
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return 2;
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break;
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default:
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cmd_len = 0;
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}
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return cmd_len;
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}
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static int
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msp430_doubleoperand (disassemble_info *info,
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struct msp430_opcode_s *opcode,
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bfd_vma addr,
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unsigned short insn,
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char *op1,
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char *op2,
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char *comm1,
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char *comm2,
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unsigned short extension_word,
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int *cycles)
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{
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int regs = 0, regd = 0;
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int ad = 0, as = 0;
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int cmd_len = 2;
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int dst = 0;
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int fmt;
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int extended_dst = extension_word & 0xf;
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int extended_src = (extension_word >> 7) & 0xf;
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regd = insn & 0x0f;
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regs = (insn & 0x0f00) >> 8;
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as = (insn & 0x0030) >> 4;
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ad = (insn & 0x0080) >> 7;
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if (opcode->fmt < 0)
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fmt = (- opcode->fmt) - 1;
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else
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fmt = opcode->fmt;
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if (fmt == 0)
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{
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/* Special case: rla and rlc are the only 2 emulated instructions that
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fall into two operand instructions. */
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/* With dst, there are only:
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Rm Register,
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x(Rm) Indexed,
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0xXXXX Relative,
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&0xXXXX Absolute
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emulated_ins dst
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basic_ins dst, dst. */
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if (regd != regs || as != ad)
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return 0; /* May be 'data' section. */
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if (ad == 0)
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{
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/* Register mode. */
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if (regd == 3)
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{
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strcpy (comm1, _("Warning: illegal as emulation instr"));
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return -1;
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}
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sprintf (op1, "r%d", regd);
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*cycles = 1;
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}
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else /* ad == 1 */
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{
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if (regd == 0)
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{
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/* PC relative, Symbolic. */
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if (msp430dis_opcode_signed (addr + 2, info, &dst, comm1))
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{
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cmd_len += 4;
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*cycles = 6;
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sprintf (op1, "0x%04x", PS (dst));
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sprintf (comm1, "PC rel. 0x%04x",
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PS ((short) addr + 2 + dst));
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if (extension_word)
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{
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dst |= extended_dst << 16;
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if (dst & 0x80000)
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dst |= -1U << 20;
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sprintf (op1, "0x%05x", dst & 0xfffff);
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sprintf (comm1, "PC rel. 0x%05lx",
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(long)((addr + 2 + dst) & 0xfffff));
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}
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}
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}
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else if (regd == 2)
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{
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/* Absolute. */
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if (msp430dis_opcode_signed (addr + 2, info, &dst, comm1))
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{
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int src;
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/* If the 'src' field is not the same as the dst
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then this is not an rla instruction. */
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if (msp430dis_opcode_signed (addr + 4, info, &src, comm2))
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{
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if (src != dst)
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return 0;
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}
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cmd_len += 4;
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*cycles = 6;
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sprintf (op1, "&0x%04x", PS (dst));
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if (extension_word)
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{
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dst |= extended_dst << 16;
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sprintf (op1, "&0x%05x", dst & 0xfffff);
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}
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}
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}
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else
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{
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/* Indexed. */
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if (msp430dis_opcode_signed (addr + 2, info, &dst, comm1))
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{
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if (extension_word)
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{
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dst |= extended_dst << 16;
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if (dst & 0x80000)
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dst |= -1U << 20;
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}
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cmd_len += 4;
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*cycles = 6;
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sprintf (op1, "%d(r%d)", dst, regd);
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if (dst > 9 || dst < -9)
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sprintf (comm1, "#0x%05x", dst);
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}
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}
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}
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*op2 = 0;
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*comm2 = 0;
|
|
|
|
return cmd_len;
|
|
}
|
|
|
|
/* Two operands exactly. */
|
|
if (ad == 0 && regd == 3)
|
|
{
|
|
/* R2/R3 are illegal as dest: may be data section. */
|
|
strcpy (comm1, _("Warning: illegal as 2-op instr"));
|
|
return -1;
|
|
}
|
|
|
|
/* Source. */
|
|
if (as == 0)
|
|
{
|
|
*cycles = 1;
|
|
if (regs == 3)
|
|
{
|
|
/* Constants. */
|
|
sprintf (op1, "#0");
|
|
sprintf (comm1, "r3 As==00");
|
|
}
|
|
else
|
|
{
|
|
/* Register. */
|
|
sprintf (op1, "r%d", regs);
|
|
}
|
|
}
|
|
else if (as == 2)
|
|
{
|
|
* cycles = print_as2_reg_name (regs, op1, comm1, 1, 1, regs == 0 ? 3 : 2);
|
|
}
|
|
else if (as == 3)
|
|
{
|
|
if (regs == 0)
|
|
{
|
|
*cycles = 3;
|
|
/* Absolute. @pc+. */
|
|
if (msp430dis_opcode_signed (addr + 2, info, &dst, comm1))
|
|
{
|
|
cmd_len += 2;
|
|
sprintf (op1, "#%d", dst);
|
|
if (dst > 9 || dst < 0)
|
|
sprintf (comm1, "#0x%04x", PS (dst));
|
|
if (extension_word)
|
|
{
|
|
dst &= 0xffff;
|
|
dst |= extended_src << 16;
|
|
if (dst & 0x80000)
|
|
dst |= -1U << 20;
|
|
sprintf (op1, "#%d", dst);
|
|
if (dst > 9 || dst < 0)
|
|
sprintf (comm1, "0x%05x", dst & 0xfffff);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
* cycles = print_as3_reg_name (regs, op1, comm1, 1, 1, 2);
|
|
}
|
|
else if (as == 1)
|
|
{
|
|
if (regs == 0)
|
|
{
|
|
*cycles = 4;
|
|
/* PC relative. */
|
|
if (msp430dis_opcode_signed (addr + 2, info, &dst, comm1))
|
|
{
|
|
cmd_len += 2;
|
|
sprintf (op1, "0x%04x", PS (dst));
|
|
sprintf (comm1, "PC rel. 0x%04x",
|
|
PS ((short) addr + 2 + dst));
|
|
if (extension_word)
|
|
{
|
|
dst &= 0xffff;
|
|
dst |= extended_src << 16;
|
|
if (dst & 0x80000)
|
|
dst |= -1U << 20;
|
|
sprintf (op1, "0x%05x", dst & 0xfffff);
|
|
sprintf (comm1, "PC rel. 0x%05lx",
|
|
(long) ((addr + 2 + dst) & 0xfffff));
|
|
}
|
|
}
|
|
}
|
|
else if (regs == 2)
|
|
{
|
|
*cycles = 2;
|
|
/* Absolute. */
|
|
if (msp430dis_opcode_signed (addr + 2, info, &dst, comm1))
|
|
{
|
|
cmd_len += 2;
|
|
sprintf (op1, "&0x%04x", PS (dst));
|
|
sprintf (comm1, "0x%04x", PS (dst));
|
|
if (extension_word)
|
|
{
|
|
dst &= 0xffff;
|
|
dst |= extended_src << 16;
|
|
sprintf (op1, "&0x%05x", dst & 0xfffff);
|
|
* comm1 = 0;
|
|
}
|
|
}
|
|
}
|
|
else if (regs == 3)
|
|
{
|
|
*cycles = 1;
|
|
sprintf (op1, "#1");
|
|
sprintf (comm1, "r3 As==01");
|
|
}
|
|
else
|
|
{
|
|
*cycles = 3;
|
|
/* Indexed. */
|
|
if (msp430dis_opcode_signed (addr + 2, info, &dst, comm1))
|
|
{
|
|
cmd_len += 2;
|
|
if (extension_word)
|
|
{
|
|
dst &= 0xffff;
|
|
dst |= extended_src << 16;
|
|
if (dst & 0x80000)
|
|
dst |= -1U << 20;
|
|
}
|
|
sprintf (op1, "%d(r%d)", dst, regs);
|
|
if (dst > 9 || dst < -9)
|
|
sprintf (comm1, "0x%05x", dst);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Destination. Special care needed on addr + XXXX. */
|
|
|
|
if (ad == 0)
|
|
{
|
|
/* Register. */
|
|
if (regd == 0)
|
|
{
|
|
*cycles += 1;
|
|
sprintf (op2, "r0");
|
|
}
|
|
else if (regd == 1)
|
|
sprintf (op2, "r1");
|
|
|
|
else if (regd == 2)
|
|
sprintf (op2, "r2");
|
|
|
|
else
|
|
sprintf (op2, "r%d", regd);
|
|
}
|
|
else /* ad == 1. */
|
|
{
|
|
* cycles += 3;
|
|
|
|
if (regd == 0)
|
|
{
|
|
/* PC relative. */
|
|
*cycles += 1;
|
|
if (msp430dis_opcode_signed (addr + cmd_len, info, &dst, comm2))
|
|
{
|
|
sprintf (op2, "0x%04x", PS (dst));
|
|
sprintf (comm2, "PC rel. 0x%04x",
|
|
PS ((short) addr + cmd_len + dst));
|
|
if (extension_word)
|
|
{
|
|
dst |= extended_dst << 16;
|
|
if (dst & 0x80000)
|
|
dst |= -1U << 20;
|
|
sprintf (op2, "0x%05x", dst & 0xfffff);
|
|
sprintf (comm2, "PC rel. 0x%05lx",
|
|
(long)((addr + cmd_len + dst) & 0xfffff));
|
|
}
|
|
}
|
|
cmd_len += 2;
|
|
}
|
|
else if (regd == 2)
|
|
{
|
|
/* Absolute. */
|
|
if (msp430dis_opcode_signed (addr + cmd_len, info, &dst, comm2))
|
|
{
|
|
cmd_len += 2;
|
|
sprintf (op2, "&0x%04x", PS (dst));
|
|
if (extension_word)
|
|
{
|
|
dst |= extended_dst << 16;
|
|
sprintf (op2, "&0x%05x", dst & 0xfffff);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (msp430dis_opcode_signed (addr + cmd_len, info, &dst, comm2))
|
|
{
|
|
cmd_len += 2;
|
|
if (dst > 9 || dst < 0)
|
|
sprintf (comm2, "0x%04x", PS (dst));
|
|
if (extension_word)
|
|
{
|
|
dst |= extended_dst << 16;
|
|
if (dst & 0x80000)
|
|
dst |= -1U << 20;
|
|
if (dst > 9 || dst < 0)
|
|
sprintf (comm2, "0x%05x", dst & 0xfffff);
|
|
}
|
|
sprintf (op2, "%d(r%d)", dst, regd);
|
|
}
|
|
}
|
|
}
|
|
|
|
return cmd_len;
|
|
}
|
|
|
|
static int
|
|
msp430_branchinstr (disassemble_info *info,
|
|
struct msp430_opcode_s *opcode ATTRIBUTE_UNUSED,
|
|
bfd_vma addr ATTRIBUTE_UNUSED,
|
|
unsigned short insn,
|
|
char *op1,
|
|
char *comm1,
|
|
int *cycles)
|
|
{
|
|
int regs = 0, regd = 0;
|
|
int as = 0;
|
|
int cmd_len = 2;
|
|
int dst = 0;
|
|
unsigned short udst = 0;
|
|
|
|
regd = insn & 0x0f;
|
|
regs = (insn & 0x0f00) >> 8;
|
|
as = (insn & 0x0030) >> 4;
|
|
|
|
if (regd != 0) /* Destination register is not a PC. */
|
|
return 0;
|
|
|
|
/* dst is a source register. */
|
|
if (as == 0)
|
|
{
|
|
/* Constants. */
|
|
if (regs == 3)
|
|
{
|
|
*cycles = 1;
|
|
sprintf (op1, "#0");
|
|
sprintf (comm1, "r3 As==00");
|
|
}
|
|
else
|
|
{
|
|
/* Register. */
|
|
*cycles = 1;
|
|
sprintf (op1, "r%d", regs);
|
|
}
|
|
}
|
|
else if (as == 2)
|
|
{
|
|
* cycles = print_as2_reg_name (regs, op1, comm1, 2, 1, 2);
|
|
}
|
|
else if (as == 3)
|
|
{
|
|
if (regs == 0)
|
|
{
|
|
/* Absolute. @pc+ */
|
|
*cycles = 3;
|
|
if (msp430dis_opcode_unsigned (addr + 2, info, &udst, comm1))
|
|
{
|
|
cmd_len += 2;
|
|
sprintf (op1, "#0x%04x", PS (udst));
|
|
}
|
|
}
|
|
else
|
|
* cycles = print_as3_reg_name (regs, op1, comm1, 1, 1, 2);
|
|
}
|
|
else if (as == 1)
|
|
{
|
|
* cycles = 3;
|
|
|
|
if (regs == 0)
|
|
{
|
|
/* PC relative. */
|
|
if (msp430dis_opcode_signed (addr + 2, info, &dst, comm1))
|
|
{
|
|
cmd_len += 2;
|
|
(*cycles)++;
|
|
sprintf (op1, "0x%04x", PS (dst));
|
|
sprintf (comm1, "PC rel. 0x%04x",
|
|
PS ((short) addr + 2 + dst));
|
|
}
|
|
}
|
|
else if (regs == 2)
|
|
{
|
|
/* Absolute. */
|
|
if (msp430dis_opcode_unsigned (addr + 2, info, &udst, comm1))
|
|
{
|
|
cmd_len += 2;
|
|
sprintf (op1, "&0x%04x", PS (udst));
|
|
}
|
|
}
|
|
else if (regs == 3)
|
|
{
|
|
(*cycles)--;
|
|
sprintf (op1, "#1");
|
|
sprintf (comm1, "r3 As==01");
|
|
}
|
|
else
|
|
{
|
|
/* Indexed. */
|
|
if (msp430dis_opcode_signed (addr + 2, info, &dst, comm1))
|
|
{
|
|
cmd_len += 2;
|
|
sprintf (op1, "%d(r%d)", dst, regs);
|
|
}
|
|
}
|
|
}
|
|
|
|
return cmd_len;
|
|
}
|
|
|
|
static int
|
|
msp430x_calla_instr (disassemble_info * info,
|
|
bfd_vma addr,
|
|
unsigned short insn,
|
|
char * op1,
|
|
char * comm1,
|
|
int * cycles)
|
|
{
|
|
unsigned int ureg = insn & 0xf;
|
|
int reg = insn & 0xf;
|
|
int am = (insn & 0xf0) >> 4;
|
|
int cmd_len = 2;
|
|
unsigned short udst = 0;
|
|
int dst = 0;
|
|
|
|
switch (am)
|
|
{
|
|
case 4: /* CALLA Rdst */
|
|
*cycles = 1;
|
|
sprintf (op1, "r%d", reg);
|
|
break;
|
|
|
|
case 5: /* CALLA x(Rdst) */
|
|
*cycles = 3;
|
|
if (msp430dis_opcode_signed (addr + 2, info, &dst, comm1))
|
|
{
|
|
cmd_len += 2;
|
|
sprintf (op1, "%d(r%d)", dst, reg);
|
|
if (reg == 0)
|
|
sprintf (comm1, "PC rel. 0x%05lx", (long) (addr + 2 + dst));
|
|
else
|
|
sprintf (comm1, "0x%05x", dst);
|
|
}
|
|
break;
|
|
|
|
case 6: /* CALLA @Rdst */
|
|
*cycles = 2;
|
|
sprintf (op1, "@r%d", reg);
|
|
break;
|
|
|
|
case 7: /* CALLA @Rdst+ */
|
|
*cycles = 2;
|
|
sprintf (op1, "@r%d+", reg);
|
|
break;
|
|
|
|
case 8: /* CALLA &abs20 */
|
|
if (msp430dis_opcode_unsigned (addr + 2, info, &udst, comm1))
|
|
{
|
|
cmd_len += 2;
|
|
*cycles = 4;
|
|
sprintf (op1, "&%d", (ureg << 16) + udst);
|
|
sprintf (comm1, "0x%05x", (ureg << 16) + udst);
|
|
}
|
|
break;
|
|
|
|
case 9: /* CALLA pcrel-sym */
|
|
if (msp430dis_opcode_signed (addr + 2, info, &dst, comm1))
|
|
{
|
|
cmd_len += 2;
|
|
*cycles = 4;
|
|
sprintf (op1, "%d(PC)", (reg << 16) + dst);
|
|
sprintf (comm1, "PC rel. 0x%05lx",
|
|
(long) (addr + 2 + dst + (reg << 16)));
|
|
}
|
|
break;
|
|
|
|
case 11: /* CALLA #imm20 */
|
|
if (msp430dis_opcode_unsigned (addr + 2, info, &udst, comm1))
|
|
{
|
|
cmd_len += 2;
|
|
*cycles = 4;
|
|
sprintf (op1, "#%d", (ureg << 16) + udst);
|
|
sprintf (comm1, "0x%05x", (ureg << 16) + udst);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
strcpy (comm1, _("Warning: unrecognised CALLA addressing mode"));
|
|
return -1;
|
|
}
|
|
|
|
return cmd_len;
|
|
}
|
|
|
|
int
|
|
print_insn_msp430 (bfd_vma addr, disassemble_info *info)
|
|
{
|
|
void *stream = info->stream;
|
|
fprintf_ftype prin = info->fprintf_func;
|
|
struct msp430_opcode_s *opcode;
|
|
char op1[32], op2[32], comm1[64], comm2[64];
|
|
int cmd_len = 0;
|
|
unsigned short insn;
|
|
int cycles = 0;
|
|
char *bc = "";
|
|
unsigned short extension_word = 0;
|
|
unsigned short bits;
|
|
|
|
if (! msp430dis_opcode_unsigned (addr, info, &insn, NULL))
|
|
{
|
|
prin (stream, ".word 0xffff; ????");
|
|
return 2;
|
|
}
|
|
|
|
if (((int) addr & 0xffff) > 0xffdf)
|
|
{
|
|
(*prin) (stream, "interrupt service routine at 0x%04x", 0xffff & insn);
|
|
return 2;
|
|
}
|
|
|
|
*comm1 = 0;
|
|
*comm2 = 0;
|
|
|
|
/* Check for an extension word. */
|
|
if ((insn & 0xf800) == 0x1800)
|
|
{
|
|
extension_word = insn;
|
|
addr += 2;
|
|
if (! msp430dis_opcode_unsigned (addr, info, &insn, NULL))
|
|
{
|
|
prin (stream, ".word 0x%04x, 0xffff; ????",
|
|
extension_word);
|
|
return 4;
|
|
}
|
|
}
|
|
|
|
for (opcode = msp430_opcodes; opcode->name; opcode++)
|
|
{
|
|
if ((insn & opcode->bin_mask) == opcode->bin_opcode
|
|
&& opcode->bin_opcode != 0x9300)
|
|
{
|
|
*op1 = 0;
|
|
*op2 = 0;
|
|
*comm1 = 0;
|
|
*comm2 = 0;
|
|
|
|
/* r0 as destination. Ad should be zero. */
|
|
if (opcode->insn_opnumb == 3
|
|
&& (insn & 0x000f) == 0
|
|
&& (insn & 0x0080) == 0)
|
|
{
|
|
cmd_len +=
|
|
msp430_branchinstr (info, opcode, addr, insn, op1, comm1,
|
|
&cycles);
|
|
if (cmd_len)
|
|
break;
|
|
}
|
|
|
|
switch (opcode->insn_opnumb)
|
|
{
|
|
int n;
|
|
int reg;
|
|
|
|
case 4:
|
|
cmd_len += msp430x_calla_instr (info, addr, insn,
|
|
op1, comm1, & cycles);
|
|
break;
|
|
|
|
case 5: /* PUSHM/POPM */
|
|
n = (insn & 0xf0) >> 4;
|
|
reg = (insn & 0xf);
|
|
|
|
sprintf (op1, "#%d", n + 1);
|
|
if (opcode->bin_opcode == 0x1400)
|
|
/* PUSHM */
|
|
sprintf (op2, "r%d", reg);
|
|
else
|
|
/* POPM */
|
|
sprintf (op2, "r%d", reg + n);
|
|
if (insn & 0x100)
|
|
sprintf (comm1, "16-bit words");
|
|
else
|
|
{
|
|
sprintf (comm1, "20-bit words");
|
|
bc =".a";
|
|
}
|
|
|
|
cycles = 2; /*FIXME*/
|
|
cmd_len = 2;
|
|
break;
|
|
|
|
case 6: /* RRAM, RRCM, RRUM, RLAM. */
|
|
n = ((insn >> 10) & 0x3) + 1;
|
|
reg = (insn & 0xf);
|
|
if ((insn & 0x10) == 0)
|
|
bc =".a";
|
|
sprintf (op1, "#%d", n);
|
|
sprintf (op2, "r%d", reg);
|
|
cycles = 2; /*FIXME*/
|
|
cmd_len = 2;
|
|
break;
|
|
|
|
case 8: /* ADDA, CMPA, SUBA. */
|
|
reg = (insn & 0xf);
|
|
n = (insn >> 8) & 0xf;
|
|
if (insn & 0x40)
|
|
{
|
|
sprintf (op1, "r%d", n);
|
|
cmd_len = 2;
|
|
}
|
|
else
|
|
{
|
|
n <<= 16;
|
|
if (msp430dis_opcode_unsigned (addr + 2, info, &bits, comm1))
|
|
{
|
|
n |= bits;
|
|
sprintf (op1, "#%d", n);
|
|
if (n > 9 || n < 0)
|
|
sprintf (comm1, "0x%05x", n);
|
|
}
|
|
cmd_len = 4;
|
|
}
|
|
sprintf (op2, "r%d", reg);
|
|
cycles = 2; /*FIXME*/
|
|
break;
|
|
|
|
case 9: /* MOVA */
|
|
reg = (insn & 0xf);
|
|
n = (insn >> 8) & 0xf;
|
|
switch ((insn >> 4) & 0xf)
|
|
{
|
|
case 0: /* MOVA @Rsrc, Rdst */
|
|
cmd_len = 2;
|
|
sprintf (op1, "@r%d", n);
|
|
if (strcmp (opcode->name, "bra") != 0)
|
|
sprintf (op2, "r%d", reg);
|
|
break;
|
|
|
|
case 1: /* MOVA @Rsrc+, Rdst */
|
|
cmd_len = 2;
|
|
if (strcmp (opcode->name, "reta") != 0)
|
|
{
|
|
sprintf (op1, "@r%d+", n);
|
|
if (strcmp (opcode->name, "bra") != 0)
|
|
sprintf (op2, "r%d", reg);
|
|
}
|
|
break;
|
|
|
|
case 2: /* MOVA &abs20, Rdst */
|
|
cmd_len = 4;
|
|
n <<= 16;
|
|
if (msp430dis_opcode_unsigned (addr + 2, info, &bits, comm1))
|
|
{
|
|
n |= bits;
|
|
sprintf (op1, "&%d", n);
|
|
if (n > 9 || n < 0)
|
|
sprintf (comm1, "0x%05x", n);
|
|
if (strcmp (opcode->name, "bra") != 0)
|
|
sprintf (op2, "r%d", reg);
|
|
}
|
|
break;
|
|
|
|
case 3: /* MOVA x(Rsrc), Rdst */
|
|
cmd_len = 4;
|
|
if (strcmp (opcode->name, "bra") != 0)
|
|
sprintf (op2, "r%d", reg);
|
|
reg = n;
|
|
if (msp430dis_opcode_signed (addr + 2, info, &n, comm1))
|
|
{
|
|
sprintf (op1, "%d(r%d)", n, reg);
|
|
if (n > 9 || n < 0)
|
|
{
|
|
if (reg == 0)
|
|
sprintf (comm1, "PC rel. 0x%05lx",
|
|
(long) (addr + 2 + n));
|
|
else
|
|
sprintf (comm1, "0x%05x", n);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 6: /* MOVA Rsrc, &abs20 */
|
|
cmd_len = 4;
|
|
reg <<= 16;
|
|
if (msp430dis_opcode_unsigned (addr + 2, info, &bits, comm2))
|
|
{
|
|
reg |= bits;
|
|
sprintf (op1, "r%d", n);
|
|
sprintf (op2, "&%d", reg);
|
|
if (reg > 9 || reg < 0)
|
|
sprintf (comm2, "0x%05x", reg);
|
|
}
|
|
break;
|
|
|
|
case 7: /* MOVA Rsrc, x(Rdst) */
|
|
cmd_len = 4;
|
|
sprintf (op1, "r%d", n);
|
|
if (msp430dis_opcode_signed (addr + 2, info, &n, comm2))
|
|
{
|
|
sprintf (op2, "%d(r%d)", n, reg);
|
|
if (n > 9 || n < 0)
|
|
{
|
|
if (reg == 0)
|
|
sprintf (comm2, "PC rel. 0x%05lx",
|
|
(long) (addr + 2 + n));
|
|
else
|
|
sprintf (comm2, "0x%05x", n);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 8: /* MOVA #imm20, Rdst */
|
|
cmd_len = 4;
|
|
n <<= 16;
|
|
if (msp430dis_opcode_unsigned (addr + 2, info, &bits, comm1))
|
|
{
|
|
n |= bits;
|
|
if (n & 0x80000)
|
|
n |= -1U << 20;
|
|
sprintf (op1, "#%d", n);
|
|
if (n > 9 || n < 0)
|
|
sprintf (comm1, "0x%05x", n);
|
|
if (strcmp (opcode->name, "bra") != 0)
|
|
sprintf (op2, "r%d", reg);
|
|
}
|
|
break;
|
|
|
|
case 12: /* MOVA Rsrc, Rdst */
|
|
cmd_len = 2;
|
|
sprintf (op1, "r%d", n);
|
|
if (strcmp (opcode->name, "bra") != 0)
|
|
sprintf (op2, "r%d", reg);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
cycles = 2; /* FIXME */
|
|
break;
|
|
}
|
|
|
|
if (cmd_len)
|
|
break;
|
|
|
|
switch (opcode->insn_opnumb)
|
|
{
|
|
case 0:
|
|
cmd_len += msp430_nooperands (opcode, addr, insn, comm1, &cycles);
|
|
break;
|
|
case 2:
|
|
cmd_len +=
|
|
msp430_doubleoperand (info, opcode, addr, insn, op1, op2,
|
|
comm1, comm2,
|
|
extension_word,
|
|
&cycles);
|
|
if (insn & BYTE_OPERATION)
|
|
{
|
|
if (extension_word != 0 && ((extension_word & BYTE_OPERATION) == 0))
|
|
bc = ".a";
|
|
else
|
|
bc = ".b";
|
|
}
|
|
else if (extension_word)
|
|
{
|
|
if (extension_word & BYTE_OPERATION)
|
|
bc = ".w";
|
|
else
|
|
{
|
|
bc = ".?";
|
|
sprintf (comm2, _("Warning: reserved use of A/L and B/W bits detected"));
|
|
}
|
|
}
|
|
|
|
break;
|
|
case 1:
|
|
cmd_len +=
|
|
msp430_singleoperand (info, opcode, addr, insn, op1, comm1,
|
|
extension_word,
|
|
&cycles);
|
|
if (extension_word
|
|
&& (strcmp (opcode->name, "swpb") == 0
|
|
|| strcmp (opcode->name, "sxt") == 0))
|
|
{
|
|
if (insn & BYTE_OPERATION)
|
|
{
|
|
bc = ".?";
|
|
sprintf (comm2, _("Warning: reserved use of A/L and B/W bits detected"));
|
|
}
|
|
else if (extension_word & BYTE_OPERATION)
|
|
bc = ".w";
|
|
else
|
|
bc = ".a";
|
|
}
|
|
else if (insn & BYTE_OPERATION && opcode->fmt != 3)
|
|
{
|
|
if (extension_word != 0 && ((extension_word & BYTE_OPERATION) == 0))
|
|
bc = ".a";
|
|
else
|
|
bc = ".b";
|
|
}
|
|
else if (extension_word)
|
|
{
|
|
if (extension_word & (1 << 6))
|
|
bc = ".w";
|
|
else
|
|
{
|
|
bc = ".?";
|
|
sprintf (comm2, _("Warning: reserved use of A/L and B/W bits detected"));
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (cmd_len)
|
|
break;
|
|
}
|
|
|
|
if (cmd_len < 1)
|
|
{
|
|
/* Unknown opcode, or invalid combination of operands. */
|
|
if (extension_word)
|
|
{
|
|
prin (stream, ".word 0x%04x, 0x%04x; ????", extension_word, PS (insn));
|
|
if (*comm1)
|
|
prin (stream, "\t %s", comm1);
|
|
return 4;
|
|
}
|
|
(*prin) (stream, ".word 0x%04x; ????", PS (insn));
|
|
return 2;
|
|
}
|
|
|
|
/* Display the repeat count (if set) for extended register mode. */
|
|
if (cmd_len == 2 && ((extension_word & 0xf) != 0))
|
|
{
|
|
if (extension_word & (1 << 7))
|
|
prin (stream, "rpt r%d { ", extension_word & 0xf);
|
|
else
|
|
prin (stream, "rpt #%d { ", (extension_word & 0xf) + 1);
|
|
}
|
|
|
|
/* Special case: RRC with an extension word and the ZC bit set is actually RRU. */
|
|
if (extension_word
|
|
&& (extension_word & IGNORE_CARRY_BIT)
|
|
&& strcmp (opcode->name, "rrc") == 0)
|
|
(*prin) (stream, "rrux%s", bc);
|
|
else if (extension_word && opcode->name[strlen (opcode->name) - 1] != 'x')
|
|
(*prin) (stream, "%sx%s", opcode->name, bc);
|
|
else
|
|
(*prin) (stream, "%s%s", opcode->name, bc);
|
|
|
|
if (*op1)
|
|
(*prin) (stream, "\t%s", op1);
|
|
if (*op2)
|
|
(*prin) (stream, ",");
|
|
|
|
if (strlen (op1) < 7)
|
|
(*prin) (stream, "\t");
|
|
if (!strlen (op1))
|
|
(*prin) (stream, "\t");
|
|
|
|
if (*op2)
|
|
(*prin) (stream, "%s", op2);
|
|
if (strlen (op2) < 8)
|
|
(*prin) (stream, "\t");
|
|
|
|
if (*comm1 || *comm2)
|
|
(*prin) (stream, ";");
|
|
else if (cycles)
|
|
{
|
|
if (*op2)
|
|
(*prin) (stream, ";");
|
|
else
|
|
{
|
|
if (strlen (op1) < 7)
|
|
(*prin) (stream, ";");
|
|
else
|
|
(*prin) (stream, "\t;");
|
|
}
|
|
}
|
|
if (*comm1)
|
|
(*prin) (stream, "%s", comm1);
|
|
if (*comm1 && *comm2)
|
|
(*prin) (stream, ",");
|
|
if (*comm2)
|
|
(*prin) (stream, " %s", comm2);
|
|
|
|
if (extension_word)
|
|
cmd_len += 2;
|
|
|
|
return cmd_len;
|
|
}
|