Subversion Repositories or1k

/* Disassembler interface for targets using CGEN. -*- C -*-

   CGEN: Cpu tools GENerator

THIS FILE IS MACHINE GENERATED WITH CGEN.

- the resultant file is machine generated, cgen-dis.in isn't

Copyright 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.

This file is part of the GNU Binutils and GDB, the GNU debugger.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software Foundation, Inc.,

59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* ??? Eventually more and more of this stuff can go to cpu-independent files.

   Keep that in mind.  */

#include "sysdep.h"

#include 

#include "ansidecl.h"

#include "dis-asm.h"

#include "bfd.h"

#include "symcat.h"

#include "@prefix@-desc.h"

#include "@prefix@-opc.h"

#include "opintl.h"

/* Default text to print if an instruction isn't recognized.  */

#define UNKNOWN_INSN_MSG _("*unknown*")

static void print_normal

     PARAMS ((CGEN_CPU_DESC, PTR, long, unsigned int, bfd_vma, int));

static void print_address

     PARAMS ((CGEN_CPU_DESC, PTR, bfd_vma, unsigned int, bfd_vma, int));

static void print_keyword

     PARAMS ((CGEN_CPU_DESC, PTR, CGEN_KEYWORD *, long, unsigned int));

static void print_insn_normal

     PARAMS ((CGEN_CPU_DESC, PTR, const CGEN_INSN *, CGEN_FIELDS *,

              bfd_vma, int));

static int print_insn PARAMS ((CGEN_CPU_DESC, bfd_vma,

                               disassemble_info *, char *, int));

static int default_print_insn

     PARAMS ((CGEN_CPU_DESC, bfd_vma, disassemble_info *));

/* -- disassembler routines inserted here */

/* Default print handler.  */

static void

print_normal (cd, dis_info, value, attrs, pc, length)

#ifdef CGEN_PRINT_NORMAL

     CGEN_CPU_DESC cd;

#else

     CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;

#endif

     PTR dis_info;

     long value;

     unsigned int attrs;

#ifdef CGEN_PRINT_NORMAL

     bfd_vma pc;

     int length;

#else

     bfd_vma pc ATTRIBUTE_UNUSED;

     int length ATTRIBUTE_UNUSED;

#endif

{

  disassemble_info *info = (disassemble_info *) dis_info;

#ifdef CGEN_PRINT_NORMAL

  CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length);

#endif

  /* Print the operand as directed by the attributes.  */

  if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))

    ; /* nothing to do */

  else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))

    (*info->fprintf_func) (info->stream, "%ld", value);

  else

    (*info->fprintf_func) (info->stream, "0x%lx", value);

}

/* Default address handler.  */

static void

print_address (cd, dis_info, value, attrs, pc, length)

#ifdef CGEN_PRINT_NORMAL

     CGEN_CPU_DESC cd;

#else

     CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;

#endif

     PTR dis_info;

     bfd_vma value;

     unsigned int attrs;

#ifdef CGEN_PRINT_NORMAL

     bfd_vma pc;

     int length;

#else

     bfd_vma pc ATTRIBUTE_UNUSED;

     int length ATTRIBUTE_UNUSED;

#endif

{

  disassemble_info *info = (disassemble_info *) dis_info;

#ifdef CGEN_PRINT_ADDRESS

  CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length);

#endif

  /* Print the operand as directed by the attributes.  */

  if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))

    ; /* nothing to do */

  else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))

    (*info->print_address_func) (value, info);

  else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))

    (*info->print_address_func) (value, info);

  else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))

    (*info->fprintf_func) (info->stream, "%ld", (long) value);

  else

    (*info->fprintf_func) (info->stream, "0x%lx", (long) value);

}

/* Keyword print handler.  */

static void

print_keyword (cd, dis_info, keyword_table, value, attrs)

     CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;

     PTR dis_info;

     CGEN_KEYWORD *keyword_table;

     long value;

     unsigned int attrs ATTRIBUTE_UNUSED;

{

  disassemble_info *info = (disassemble_info *) dis_info;

  const CGEN_KEYWORD_ENTRY *ke;

  ke = cgen_keyword_lookup_value (keyword_table, value);

  if (ke != NULL)

    (*info->fprintf_func) (info->stream, "%s", ke->name);

  else

    (*info->fprintf_func) (info->stream, "???");

}

/* Default insn printer.

   DIS_INFO is defined as `PTR' so the disassembler needn't know anything

   about disassemble_info.  */

static void

print_insn_normal (cd, dis_info, insn, fields, pc, length)

     CGEN_CPU_DESC cd;

     PTR dis_info;

     const CGEN_INSN *insn;

     CGEN_FIELDS *fields;

     bfd_vma pc;

     int length;

{

  const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);

  disassemble_info *info = (disassemble_info *) dis_info;

  const CGEN_SYNTAX_CHAR_TYPE *syn;

  CGEN_INIT_PRINT (cd);

  for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)

    {

      if (CGEN_SYNTAX_MNEMONIC_P (*syn))

        {

          (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));

          continue;

        }

      if (CGEN_SYNTAX_CHAR_P (*syn))

        {

          (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));

          continue;

        }

      /* We have an operand.  */

      @arch@_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,

                                 fields, CGEN_INSN_ATTRS (insn), pc, length);

    }

}

/* Subroutine of print_insn. Reads an insn into the given buffers and updates

   the extract info.

   Returns 0 if all is well, non-zero otherwise.  */

static int

read_insn (cd, pc, info, buf, buflen, ex_info, insn_value)

     CGEN_CPU_DESC cd;

     bfd_vma pc;

     disassemble_info *info;

     char *buf;

     int buflen;

     CGEN_EXTRACT_INFO *ex_info;

     unsigned long *insn_value;

{

  int status = (*info->read_memory_func) (pc, buf, buflen, info);

  if (status != 0)

    {

      (*info->memory_error_func) (status, pc, info);

      return -1;

    }

  ex_info->dis_info = info;

  ex_info->valid = (1 << buflen) - 1;

  ex_info->insn_bytes = buf;

  *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);

  return 0;

}

/* Utility to print an insn.

   BUF is the base part of the insn, target byte order, BUFLEN bytes long.

   The result is the size of the insn in bytes or zero for an unknown insn

   or -1 if an error occurs fetching data (memory_error_func will have

   been called).  */

static int

print_insn (cd, pc, info, buf, buflen)

     CGEN_CPU_DESC cd;

     bfd_vma pc;

     disassemble_info *info;

     char *buf;

     int buflen;

{

  unsigned long insn_value;

  const CGEN_INSN_LIST *insn_list;

  CGEN_EXTRACT_INFO ex_info;

  /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */

  insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);

  /* Fill in ex_info fields like read_insn would.  Don't actually call

     read_insn, since the incoming buffer is already read (and possibly

     modified a la m32r).  */

  ex_info.valid = (1 << buflen) - 1;

  ex_info.dis_info = info;

  ex_info.insn_bytes = buf;

  /* The instructions are stored in hash lists.

     Pick the first one and keep trying until we find the right one.  */

  insn_list = CGEN_DIS_LOOKUP_INSN (cd, buf, insn_value);

  while (insn_list != NULL)

    {

      const CGEN_INSN *insn = insn_list->insn;

      CGEN_FIELDS fields;

      int length;

      unsigned long insn_value_cropped;

#ifdef CGEN_VALIDATE_INSN_SUPPORTED

      /* not needed as insn shouldn't be in hash lists if not supported */

      /* Supported by this cpu?  */

      if (! @arch@_cgen_insn_supported (cd, insn))

        {

          insn_list = CGEN_DIS_NEXT_INSN (insn_list);

          continue;

        }

#endif

      /* Basic bit mask must be correct.  */

      /* ??? May wish to allow target to defer this check until the extract

         handler.  */

      /* Base size may exceed this instruction's size.  Extract the

         relevant part from the buffer. */

      if ((CGEN_INSN_BITSIZE (insn) / 8) < buflen &&

          (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))

        insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),

                                           info->endian == BFD_ENDIAN_BIG);

      else

        insn_value_cropped = insn_value;

      if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))

          == CGEN_INSN_BASE_VALUE (insn))

        {

          /* Printing is handled in two passes.  The first pass parses the

             machine insn and extracts the fields.  The second pass prints

             them.  */

          /* Make sure the entire insn is loaded into insn_value, if it

             can fit.  */

          if (CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize &&

              (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))

            {

              unsigned long full_insn_value;

              int rc = read_insn (cd, pc, info, buf,

                                  CGEN_INSN_BITSIZE (insn) / 8,

                                  & ex_info, & full_insn_value);

              if (rc != 0)

                return rc;

              length = CGEN_EXTRACT_FN (cd, insn)

                (cd, insn, &ex_info, full_insn_value, &fields, pc);

            }

          else

            length = CGEN_EXTRACT_FN (cd, insn)

              (cd, insn, &ex_info, insn_value_cropped, &fields, pc);

          /* length < 0 -> error */

          if (length < 0)

            return length;

          if (length > 0)

            {

              CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);

              /* length is in bits, result is in bytes */

              return length / 8;

            }

        }

      insn_list = CGEN_DIS_NEXT_INSN (insn_list);

    }

  return 0;

}

/* Default value for CGEN_PRINT_INSN.

   The result is the size of the insn in bytes or zero for an unknown insn

   or -1 if an error occured fetching bytes.  */

#ifndef CGEN_PRINT_INSN

#define CGEN_PRINT_INSN default_print_insn

#endif

static int

default_print_insn (cd, pc, info)

     CGEN_CPU_DESC cd;

     bfd_vma pc;

     disassemble_info *info;

{

  char buf[CGEN_MAX_INSN_SIZE];

  int buflen;

  int status;

  /* Attempt to read the base part of the insn.  */

  buflen = cd->base_insn_bitsize / 8;

  status = (*info->read_memory_func) (pc, buf, buflen, info);

  /* Try again with the minimum part, if min < base.  */

  if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))

    {

      buflen = cd->min_insn_bitsize / 8;

      status = (*info->read_memory_func) (pc, buf, buflen, info);

    }

  if (status != 0)

    {

      (*info->memory_error_func) (status, pc, info);

      return -1;

    }

  return print_insn (cd, pc, info, buf, buflen);

}

/* Main entry point.

   Print one instruction from PC on INFO->STREAM.

   Return the size of the instruction (in bytes).  */

int

print_insn_@arch@ (pc, info)

     bfd_vma pc;

     disassemble_info *info;

{

  static CGEN_CPU_DESC cd = 0;

  static int prev_isa;

  static int prev_mach;

  static int prev_endian;

  int length;

  int isa,mach;

  int endian = (info->endian == BFD_ENDIAN_BIG

                ? CGEN_ENDIAN_BIG

                : CGEN_ENDIAN_LITTLE);

  enum bfd_architecture arch;

  /* ??? gdb will set mach but leave the architecture as "unknown" */

#ifndef CGEN_BFD_ARCH

#define CGEN_BFD_ARCH bfd_arch_@arch@

#endif

  arch = info->arch;

  if (arch == bfd_arch_unknown)

    arch = CGEN_BFD_ARCH;

  /* There's no standard way to compute the machine or isa number

     so we leave it to the target.  */

#ifdef CGEN_COMPUTE_MACH

  mach = CGEN_COMPUTE_MACH (info);

#else

  mach = info->mach;

#endif

#ifdef CGEN_COMPUTE_ISA

  isa = CGEN_COMPUTE_ISA (info);

#else

  isa = 0;

#endif

  /* If we've switched cpu's, close the current table and open a new one.  */

  if (cd

      && (isa != prev_isa

          || mach != prev_mach

          || endian != prev_endian))

    {

      @arch@_cgen_cpu_close (cd);

      cd = 0;

    }

  /* If we haven't initialized yet, initialize the opcode table.  */

  if (! cd)

    {

      const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);

      const char *mach_name;

      if (!arch_type)

        abort ();

      mach_name = arch_type->printable_name;

      prev_isa = isa;

      prev_mach = mach;

      prev_endian = endian;

      cd = @arch@_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,

                                 CGEN_CPU_OPEN_BFDMACH, mach_name,

                                 CGEN_CPU_OPEN_ENDIAN, prev_endian,

                                 CGEN_CPU_OPEN_END);

      if (!cd)

        abort ();

      @arch@_cgen_init_dis (cd);

    }

  /* We try to have as much common code as possible.

     But at this point some targets need to take over.  */

  /* ??? Some targets may need a hook elsewhere.  Try to avoid this,

     but if not possible try to move this hook elsewhere rather than

     have two hooks.  */

  length = CGEN_PRINT_INSN (cd, pc, info);

  if (length > 0)

    return length;

  if (length < 0)

    return -1;

  (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);

  return cd->default_insn_bitsize / 8;

}