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/* Instruction printing code for the ARM
   Copyright (C) 1994, 95, 96, 97, 98, 99, 2000 Free Software Foundation, Inc.
   Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
   Modification by James G. Smith (jsmith@cygnus.co.uk)
 
This file is part of libopcodes.
 
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 of the License, 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.  */
 
#include "sysdep.h"
#include "dis-asm.h"
#define DEFINE_TABLE
#include "arm-opc.h"
#include "coff/internal.h"
#include "libcoff.h"
#include "opintl.h"
 
/* FIXME: This shouldn't be done here */
#include "elf-bfd.h"
#include "elf/internal.h"
#include "elf/arm.h"
 
#ifndef streq
#define streq(a,b)      (strcmp ((a), (b)) == 0)
#endif
 
#ifndef strneq
#define strneq(a,b,n)   (strncmp ((a), (b), (n)) == 0)
#endif
 
#ifndef NUM_ELEM
#define NUM_ELEM(a)     (sizeof (a) / sizeof (a)[0])
#endif
 
static char * arm_conditional[] =
{"eq", "ne", "cs", "cc", "mi", "pl", "vs", "vc",
 "hi", "ls", "ge", "lt", "gt", "le", "", "nv"};
 
typedef struct
{
  const char * name;
  const char * description;
  const char * reg_names[16];
}
arm_regname;
 
static arm_regname regnames[] =
{
  { "raw" , "Select raw register names",
    { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"}},
  { "std",  "Select register names used in ARM's ISA documentation",
    { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "sp",  "lr",  "pc" }},
  { "apcs", "Select register names used in the APCS",
    { "a1", "a2", "a3", "a4", "v1", "v2", "v3", "v4", "v5", "v6", "sl",  "fp",  "ip",  "sp",  "lr",  "pc" }},
  { "atpcs", "Select register names used in the ATPCS",
    { "a1", "a2", "a3", "a4", "v1", "v2", "v3", "v4", "v5", "v6", "v7",  "v8",  "IP",  "SP",  "LR",  "PC" }},
  { "special-atpcs", "Select special register names used in the ATPCS",
    { "a1", "a2", "a3", "a4", "v1", "v2", "v3", "WR", "v5", "SB", "SL",  "FP",  "IP",  "SP",  "LR",  "PC" }}
};
 
/* Default to standard register name set.  */
static unsigned int regname_selected = 1;
 
#define NUM_ARM_REGNAMES  NUM_ELEM (regnames)
#define arm_regnames      regnames[regname_selected].reg_names
 
static boolean force_thumb = false;
 
static char * arm_fp_const[] =
{"0.0", "1.0", "2.0", "3.0", "4.0", "5.0", "0.5", "10.0"};
 
static char * arm_shift[] =
{"lsl", "lsr", "asr", "ror"};
 
/* Forward declarations.  */
static void arm_decode_shift PARAMS ((long, fprintf_ftype, void *));
static int  print_insn_arm   PARAMS ((bfd_vma, struct disassemble_info *, long));
static int  print_insn_thumb PARAMS ((bfd_vma, struct disassemble_info *, long));
static void parse_disassembler_options PARAMS ((char *));
static int  print_insn       PARAMS ((bfd_vma, struct disassemble_info *, boolean));
int get_arm_regname_num_options (void);
int set_arm_regname_option (int option);
int get_arm_regnames (int option, const char **setname,
                      const char **setdescription,
                      const char ***register_names);
 
/* Functions. */
int
get_arm_regname_num_options (void)
{
  return NUM_ARM_REGNAMES;
}
 
int
set_arm_regname_option (int option)
{
  int old = regname_selected;
  regname_selected = option;
  return old;
}
 
int
get_arm_regnames (int option, const char **setname,
                  const char **setdescription,
                  const char ***register_names)
{
  *setname = regnames[option].name;
  *setdescription = regnames[option].description;
  *register_names = regnames[option].reg_names;
  return 16;
}
 
static void
arm_decode_shift (given, func, stream)
     long given;
     fprintf_ftype func;
     void * stream;
{
  func (stream, "%s", arm_regnames[given & 0xf]);
 
  if ((given & 0xff0) != 0)
    {
      if ((given & 0x10) == 0)
        {
          int amount = (given & 0xf80) >> 7;
          int shift = (given & 0x60) >> 5;
 
          if (amount == 0)
            {
              if (shift == 3)
                {
                  func (stream, ", rrx");
                  return;
                }
 
              amount = 32;
            }
 
          func (stream, ", %s #%d", arm_shift[shift], amount);
        }
      else
        func (stream, ", %s %s", arm_shift[(given & 0x60) >> 5],
              arm_regnames[(given & 0xf00) >> 8]);
    }
}
 
/* Print one instruction from PC on INFO->STREAM.
   Return the size of the instruction (always 4 on ARM). */
static int
print_insn_arm (pc, info, given)
     bfd_vma                   pc;
     struct disassemble_info * info;
     long                      given;
{
  struct arm_opcode *  insn;
  void *               stream = info->stream;
  fprintf_ftype        func   = info->fprintf_func;
 
  for (insn = arm_opcodes; insn->assembler; insn++)
    {
      if ((given & insn->mask) == insn->value)
        {
          char * c;
 
          for (c = insn->assembler; *c; c++)
            {
              if (*c == '%')
                {
                  switch (*++c)
                    {
                    case '%':
                      func (stream, "%%");
                      break;
 
                    case 'a':
                      if (((given & 0x000f0000) == 0x000f0000)
                          && ((given & 0x02000000) == 0))
                        {
                          int offset = given & 0xfff;
 
                          func (stream, "[pc");
 
                          if (given & 0x01000000)
                            {
                              if ((given & 0x00800000) == 0)
                                offset = - offset;
 
                              /* pre-indexed */
                              func (stream, ", #%x]", offset);
 
                              offset += pc + 8;
 
                              /* Cope with the possibility of write-back
                                 being used.  Probably a very dangerous thing
                                 for the programmer to do, but who are we to
                                 argue ?  */
                              if (given & 0x00200000)
                                func (stream, "!");
                            }
                          else
                            {
                              /* Post indexed.  */
                              func (stream, "], #%x", offset);
 
                              offset = pc + 8;  /* ie ignore the offset.  */
                            }
 
                          func (stream, "\t; ");
                          info->print_address_func (offset, info);
                        }
                      else
                        {
                          func (stream, "[%s",
                                arm_regnames[(given >> 16) & 0xf]);
                          if ((given & 0x01000000) != 0)
                            {
                              if ((given & 0x02000000) == 0)
                                {
                                  int offset = given & 0xfff;
                                  if (offset)
                                    func (stream, ", %s#%d",
                                          (((given & 0x00800000) == 0)
                                           ? "-" : ""), offset);
                                }
                              else
                                {
                                  func (stream, ", %s",
                                        (((given & 0x00800000) == 0)
                                         ? "-" : ""));
                                  arm_decode_shift (given, func, stream);
                                }
 
                              func (stream, "]%s",
                                    ((given & 0x00200000) != 0) ? "!" : "");
                            }
                          else
                            {
                              if ((given & 0x02000000) == 0)
                                {
                                  int offset = given & 0xfff;
                                  if (offset)
                                    func (stream, "], %s#%d",
                                          (((given & 0x00800000) == 0)
                                           ? "-" : ""), offset);
                                  else
                                    func (stream, "]");
                                }
                              else
                                {
                                  func (stream, "], %s",
                                        (((given & 0x00800000) == 0)
                                         ? "-" : ""));
                                  arm_decode_shift (given, func, stream);
                                }
                            }
                        }
                      break;
 
                    case 's':
                      if ((given & 0x004f0000) == 0x004f0000)
                        {
                          /* PC relative with immediate offset.  */
                          int offset = ((given & 0xf00) >> 4) | (given & 0xf);
 
                          if ((given & 0x00800000) == 0)
                            offset = -offset;
 
                          func (stream, "[pc, #%x]\t; ", offset);
 
                          (*info->print_address_func)
                            (offset + pc + 8, info);
                        }
                      else
                        {
                          func (stream, "[%s",
                                arm_regnames[(given >> 16) & 0xf]);
                          if ((given & 0x01000000) != 0)
                            {
                              /* Pre-indexed.  */
                              if ((given & 0x00400000) == 0x00400000)
                                {
                                  /* Immediate.  */
                                  int offset = ((given & 0xf00) >> 4) | (given & 0xf);
                                  if (offset)
                                    func (stream, ", %s#%d",
                                          (((given & 0x00800000) == 0)
                                           ? "-" : ""), offset);
                                }
                              else
                                {
                                  /* Register.  */
                                  func (stream, ", %s%s",
                                        (((given & 0x00800000) == 0)
                                         ? "-" : ""),
                                        arm_regnames[given & 0xf]);
                                }
 
                              func (stream, "]%s",
                                    ((given & 0x00200000) != 0) ? "!" : "");
                            }
                          else
                            {
                              /* Post-indexed.  */
                              if ((given & 0x00400000) == 0x00400000)
                                {
                                  /* Immediate.  */
                                  int offset = ((given & 0xf00) >> 4) | (given & 0xf);
                                  if (offset)
                                    func (stream, "], %s#%d",
                                          (((given & 0x00800000) == 0)
                                           ? "-" : ""), offset);
                                  else
                                    func (stream, "]");
                                }
                              else
                                {
                                  /* Register.  */
                                  func (stream, "], %s%s",
                                        (((given & 0x00800000) == 0)
                                         ? "-" : ""),
                                        arm_regnames[given & 0xf]);
                                }
                            }
                        }
                      break;
 
                    case 'b':
                      (*info->print_address_func)
                        (BDISP (given) * 4 + pc + 8, info);
                      break;
 
                    case 'c':
                      func (stream, "%s",
                            arm_conditional [(given >> 28) & 0xf]);
                      break;
 
                    case 'm':
                      {
                        int started = 0;
                        int reg;
 
                        func (stream, "{");
                        for (reg = 0; reg < 16; reg++)
                          if ((given & (1 << reg)) != 0)
                            {
                              if (started)
                                func (stream, ", ");
                              started = 1;
                              func (stream, "%s", arm_regnames[reg]);
                            }
                        func (stream, "}");
                      }
                      break;
 
                    case 'o':
                      if ((given & 0x02000000) != 0)
                        {
                          int rotate = (given & 0xf00) >> 7;
                          int immed = (given & 0xff);
                          immed = (((immed << (32 - rotate))
                                    | (immed >> rotate)) & 0xffffffff);
                          func (stream, "#%d\t; 0x%x", immed, immed);
                        }
                      else
                        arm_decode_shift (given, func, stream);
                      break;
 
                    case 'p':
                      if ((given & 0x0000f000) == 0x0000f000)
                        func (stream, "p");
                      break;
 
                    case 't':
                      if ((given & 0x01200000) == 0x00200000)
                        func (stream, "t");
                      break;
 
                    case 'h':
                      if ((given & 0x00000020) == 0x00000020)
                        func (stream, "h");
                      else
                        func (stream, "b");
                      break;
 
                    case 'A':
                      func (stream, "[%s", arm_regnames [(given >> 16) & 0xf]);
                      if ((given & 0x01000000) != 0)
                        {
                          int offset = given & 0xff;
                          if (offset)
                            func (stream, ", %s#%d]%s",
                                  ((given & 0x00800000) == 0 ? "-" : ""),
                                  offset * 4,
                                  ((given & 0x00200000) != 0 ? "!" : ""));
                          else
                            func (stream, "]");
                        }
                      else
                        {
                          int offset = given & 0xff;
                          if (offset)
                            func (stream, "], %s#%d",
                                  ((given & 0x00800000) == 0 ? "-" : ""),
                                  offset * 4);
                          else
                            func (stream, "]");
                        }
                      break;
 
                    case 'C':
                      switch (given & 0x00090000)
                        {
                        default:
                          func (stream, "_???");
                          break;
                        case 0x90000:
                          func (stream, "_all");
                          break;
                        case 0x10000:
                          func (stream, "_ctl");
                          break;
                        case 0x80000:
                          func (stream, "_flg");
                          break;
                        }
                      break;
 
                    case 'F':
                      switch (given & 0x00408000)
                        {
                        case 0:
                          func (stream, "4");
                          break;
                        case 0x8000:
                          func (stream, "1");
                          break;
                        case 0x00400000:
                          func (stream, "2");
                          break;
                        default:
                          func (stream, "3");
                        }
                      break;
 
                    case 'P':
                      switch (given & 0x00080080)
                        {
                        case 0:
                          func (stream, "s");
                          break;
                        case 0x80:
                          func (stream, "d");
                          break;
                        case 0x00080000:
                          func (stream, "e");
                          break;
                        default:
                          func (stream, _("<illegal precision>"));
                          break;
                        }
                      break;
                    case 'Q':
                      switch (given & 0x00408000)
                        {
                        case 0:
                          func (stream, "s");
                          break;
                        case 0x8000:
                          func (stream, "d");
                          break;
                        case 0x00400000:
                          func (stream, "e");
                          break;
                        default:
                          func (stream, "p");
                          break;
                        }
                      break;
                    case 'R':
                      switch (given & 0x60)
                        {
                        case 0:
                          break;
                        case 0x20:
                          func (stream, "p");
                          break;
                        case 0x40:
                          func (stream, "m");
                          break;
                        default:
                          func (stream, "z");
                          break;
                        }
                      break;
 
                    case '0': case '1': case '2': case '3': case '4':
                    case '5': case '6': case '7': case '8': case '9':
                      {
                        int bitstart = *c++ - '0';
                        int bitend = 0;
                        while (*c >= '0' && *c <= '9')
                          bitstart = (bitstart * 10) + *c++ - '0';
 
                        switch (*c)
                          {
                          case '-':
                            c++;
 
                            while (*c >= '0' && *c <= '9')
                              bitend = (bitend * 10) + *c++ - '0';
 
                            if (!bitend)
                              abort ();
 
                            switch (*c)
                              {
                              case 'r':
                                {
                                  long reg;
 
                                  reg = given >> bitstart;
                                  reg &= (2 << (bitend - bitstart)) - 1;
 
                                  func (stream, "%s", arm_regnames[reg]);
                                }
                                break;
                              case 'd':
                                {
                                  long reg;
 
                                  reg = given >> bitstart;
                                  reg &= (2 << (bitend - bitstart)) - 1;
 
                                  func (stream, "%d", reg);
                                }
                                break;
                              case 'x':
                                {
                                  long reg;
 
                                  reg = given >> bitstart;
                                  reg &= (2 << (bitend - bitstart)) - 1;
 
                                  func (stream, "0x%08x", reg);
 
                                  /* Some SWI instructions have special
                                     meanings.  */
                                  if ((given & 0x0fffffff) == 0x0FF00000)
                                    func (stream, "\t; IMB");
                                  else if ((given & 0x0fffffff) == 0x0FF00001)
                                    func (stream, "\t; IMBRange");
                                }
                                break;
                              case 'X':
                                {
                                  long reg;
 
                                  reg = given >> bitstart;
                                  reg &= (2 << (bitend - bitstart)) - 1;
 
                                  func (stream, "%01x", reg & 0xf);
                                }
                                break;
                              case 'f':
                                {
                                  long reg;
 
                                  reg = given >> bitstart;
                                  reg &= (2 << (bitend - bitstart)) - 1;
 
                                  if (reg > 7)
                                    func (stream, "#%s",
                                          arm_fp_const[reg & 7]);
                                  else
                                    func (stream, "f%d", reg);
                                }
                                break;
                              default:
                                abort ();
                              }
                            break;
 
                          case '`':
                            c++;
                            if ((given & (1 << bitstart)) == 0)
                              func (stream, "%c", *c);
                            break;
                          case '\'':
                            c++;
                            if ((given & (1 << bitstart)) != 0)
                              func (stream, "%c", *c);
                            break;
                          case '?':
                            ++c;
                            if ((given & (1 << bitstart)) != 0)
                              func (stream, "%c", *c++);
                            else
                              func (stream, "%c", *++c);
                            break;
                          default:
                            abort ();
                          }
                        break;
 
                      default:
                        abort ();
                      }
                    }
                }
              else
                func (stream, "%c", *c);
            }
          return 4;
        }
    }
  abort ();
}
 
/* Print one instruction from PC on INFO->STREAM.
   Return the size of the instruction. */
static int
print_insn_thumb (pc, info, given)
     bfd_vma                   pc;
     struct disassemble_info * info;
     long                      given;
{
  struct thumb_opcode * insn;
  void *                stream = info->stream;
  fprintf_ftype         func = info->fprintf_func;
 
  for (insn = thumb_opcodes; insn->assembler; insn++)
    {
      if ((given & insn->mask) == insn->value)
        {
          char * c = insn->assembler;
 
          /* Special processing for Thumb 2 instruction BL sequence:  */
          if (!*c) /* Check for empty (not NULL) assembler string.  */
            {
              info->bytes_per_chunk = 4;
              info->bytes_per_line  = 4;
 
                func (stream, "bl\t");
 
              info->print_address_func (BDISP23 (given) * 2 + pc + 4, info);
              return 4;
            }
          else
            {
              info->bytes_per_chunk = 2;
              info->bytes_per_line  = 4;
 
              given &= 0xffff;
 
              for (; *c; c++)
                {
                  if (*c == '%')
                    {
                      int domaskpc = 0;
                      int domasklr = 0;
 
                      switch (*++c)
                        {
                        case '%':
                          func (stream, "%%");
                          break;
 
                        case 'S':
                          {
                            long reg;
 
                            reg = (given >> 3) & 0x7;
                            if (given & (1 << 6))
                              reg += 8;
 
                            func (stream, "%s", arm_regnames[reg]);
                          }
                          break;
 
                        case 'D':
                          {
                            long reg;
 
                            reg = given & 0x7;
                            if (given & (1 << 7))
                             reg += 8;
 
                            func (stream, "%s", arm_regnames[reg]);
                          }
                          break;
 
                        case 'T':
                          func (stream, "%s",
                                arm_conditional [(given >> 8) & 0xf]);
                          break;
 
                        case 'N':
                          if (given & (1 << 8))
                            domasklr = 1;
                          /* Fall through.  */
                        case 'O':
                          if (*c == 'O' && (given & (1 << 8)))
                            domaskpc = 1;
                          /* Fall through.  */
                        case 'M':
                          {
                            int started = 0;
                            int reg;
 
                            func (stream, "{");
 
                            /* It would be nice if we could spot
                               ranges, and generate the rS-rE format: */
                            for (reg = 0; (reg < 8); reg++)
                              if ((given & (1 << reg)) != 0)
                                {
                                  if (started)
                                    func (stream, ", ");
                                  started = 1;
                                  func (stream, "%s", arm_regnames[reg]);
                                }
 
                            if (domasklr)
                              {
                                if (started)
                                  func (stream, ", ");
                                started = 1;
                                func (stream, arm_regnames[14] /* "lr" */);
                              }
 
                            if (domaskpc)
                              {
                                if (started)
                                  func (stream, ", ");
                                func (stream, arm_regnames[15] /* "pc" */);
                              }
 
                            func (stream, "}");
                          }
                          break;
 
 
                        case '0': case '1': case '2': case '3': case '4':
                        case '5': case '6': case '7': case '8': case '9':
                          {
                            int bitstart = *c++ - '0';
                            int bitend = 0;
 
                            while (*c >= '0' && *c <= '9')
                              bitstart = (bitstart * 10) + *c++ - '0';
 
                            switch (*c)
                              {
                              case '-':
                                {
                                  long reg;
 
                                  c++;
                                  while (*c >= '0' && *c <= '9')
                                    bitend = (bitend * 10) + *c++ - '0';
                                  if (!bitend)
                                    abort ();
                                  reg = given >> bitstart;
                                  reg &= (2 << (bitend - bitstart)) - 1;
                                  switch (*c)
                                    {
                                    case 'r':
                                      func (stream, "%s", arm_regnames[reg]);
                                      break;
 
                                    case 'd':
                                      func (stream, "%d", reg);
                                      break;
 
                                    case 'H':
                                      func (stream, "%d", reg << 1);
                                      break;
 
                                    case 'W':
                                      func (stream, "%d", reg << 2);
                                      break;
 
                                    case 'a':
                                      /* PC-relative address -- the bottom two
                                         bits of the address are dropped
                                         before the calculation.  */
                                      info->print_address_func
                                        (((pc + 4) & ~3) + (reg << 2), info);
                                      break;
 
                                    case 'x':
                                      func (stream, "0x%04x", reg);
                                      break;
 
                                    case 'I':
                                      reg = ((reg ^ (1 << bitend)) - (1 << bitend));
                                      func (stream, "%d", reg);
                                      break;
 
                                    case 'B':
                                      reg = ((reg ^ (1 << bitend)) - (1 << bitend));
                                      (*info->print_address_func)
                                        (reg * 2 + pc + 4, info);
                                      break;
 
                                    default:
                                      abort ();
                                    }
                                }
                                break;
 
                              case '\'':
                                c++;
                                if ((given & (1 << bitstart)) != 0)
                                  func (stream, "%c", *c);
                                break;
 
                              case '?':
                                ++c;
                                if ((given & (1 << bitstart)) != 0)
                                  func (stream, "%c", *c++);
                                else
                                  func (stream, "%c", *++c);
                                break;
 
                              default:
                                 abort ();
                              }
                          }
                          break;
 
                        default:
                          abort ();
                        }
                    }
                  else
                    func (stream, "%c", *c);
                }
             }
          return 2;
       }
    }
 
  /* No match.  */
  abort ();
}
 
/* Parse an individual disassembler option.  */
void
parse_arm_disassembler_option (option)
     char * option;
{
  if (option == NULL)
    return;
 
  if (strneq (option, "reg-names-", 10))
    {
      int i;
 
      option += 10;
 
      for (i = NUM_ARM_REGNAMES; i--;)
        if (streq (option, regnames[i].name))
          {
            regname_selected = i;
            break;
          }
 
      if (i < 0)
        fprintf (stderr, _("Unrecognised register name set: %s\n"), option);
    }
  else if (streq (option, "force-thumb"))
    force_thumb = 1;
  else if (streq (option, "no-force-thumb"))
    force_thumb = 0;
  else
    fprintf (stderr, _("Unrecognised disassembler option: %s\n"), option);
 
  return;
}
 
/* Parse the string of disassembler options, spliting it at whitespaces.  */
static void
parse_disassembler_options (options)
     char * options;
{
  char * space;
 
  if (options == NULL)
    return;
 
  do
    {
      space = strchr (options, ' ');
 
      if (space)
        {
          * space = '\0';
          parse_arm_disassembler_option (options);
          * space = ' ';
          options = space + 1;
        }
      else
        parse_arm_disassembler_option (options);
    }
  while (space);
}
 
/* NOTE: There are no checks in these routines that
   the relevant number of data bytes exist.  */
static int
print_insn (pc, info, little)
     bfd_vma pc;
     struct disassemble_info * info;
     boolean little;
{
  unsigned char      b[4];
  long               given;
  int                status;
  int                is_thumb;
 
  if (info->disassembler_options)
    {
      parse_disassembler_options (info->disassembler_options);
 
      /* To avoid repeated parsing of these options, we remove them here.  */
      info->disassembler_options = NULL;
    }
 
  is_thumb = force_thumb;
 
  if (!is_thumb && info->symbols != NULL)
    {
      if (bfd_asymbol_flavour (*info->symbols) == bfd_target_coff_flavour)
        {
          coff_symbol_type * cs;
 
          cs = coffsymbol (*info->symbols);
          is_thumb = (   cs->native->u.syment.n_sclass == C_THUMBEXT
                      || cs->native->u.syment.n_sclass == C_THUMBSTAT
                      || cs->native->u.syment.n_sclass == C_THUMBLABEL
                      || cs->native->u.syment.n_sclass == C_THUMBEXTFUNC
                      || cs->native->u.syment.n_sclass == C_THUMBSTATFUNC);
        }
      else if (bfd_asymbol_flavour (*info->symbols) == bfd_target_elf_flavour)
        {
          elf_symbol_type *  es;
          unsigned int       type;
 
          es = *(elf_symbol_type **)(info->symbols);
          type = ELF_ST_TYPE (es->internal_elf_sym.st_info);
 
          is_thumb = (type == STT_ARM_TFUNC) || (type == STT_ARM_16BIT);
        }
    }
 
  info->bytes_per_chunk = 4;
  info->display_endian  = little ? BFD_ENDIAN_LITTLE : BFD_ENDIAN_BIG;
 
  if (little)
    {
      status = info->read_memory_func (pc, (bfd_byte *) &b[0], 4, info);
      if (status != 0 && is_thumb)
        {
          info->bytes_per_chunk = 2;
 
          status = info->read_memory_func (pc, (bfd_byte *) b, 2, info);
          b[3] = b[2] = 0;
        }
 
      if (status != 0)
        {
          info->memory_error_func (status, pc, info);
          return -1;
        }
 
      given = (b[0]) | (b[1] << 8) | (b[2] << 16) | (b[3] << 24);
    }
  else
    {
      status = info->read_memory_func
        (pc & ~ 0x3, (bfd_byte *) &b[0], 4, info);
      if (status != 0)
        {
          info->memory_error_func (status, pc, info);
          return -1;
        }
 
      if (is_thumb)
        {
          if (pc & 0x2)
            {
              given = (b[2] << 8) | b[3];
 
              status = info->read_memory_func
                ((pc + 4) & ~ 0x3, (bfd_byte *) b, 4, info);
              if (status != 0)
                {
                  info->memory_error_func (status, pc + 4, info);
                  return -1;
                }
 
              given |= (b[0] << 24) | (b[1] << 16);
            }
          else
            given = (b[0] << 8) | b[1] | (b[2] << 24) | (b[3] << 16);
        }
      else
        given = (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | (b[3]);
    }
 
  if (is_thumb)
    status = print_insn_thumb (pc, info, given);
  else
    status = print_insn_arm (pc, info, given);
 
  return status;
}
 
int
print_insn_big_arm (pc, info)
     bfd_vma pc;
     struct disassemble_info * info;
{
  return print_insn (pc, info, false);
}
 
int
print_insn_little_arm (pc, info)
     bfd_vma pc;
     struct disassemble_info * info;
{
  return print_insn (pc, info, true);
}
 
void
print_arm_disassembler_options (FILE * stream)
{
  int i;
 
  fprintf (stream, _("\n\
The following ARM specific disassembler options are supported for use with\n\
the -M switch:\n"));
 
  for (i = NUM_ARM_REGNAMES; i--;)
    fprintf (stream, "  reg-names-%s %*c%s\n",
             regnames[i].name,
             14 - strlen (regnames[i].name), ' ',
             regnames[i].description);
 
  fprintf (stream, "  force-thumb              Assume all insns are Thumb insns\n");
  fprintf (stream, "  no-force-thumb           Examine preceeding label to determine an insn's type\n\n");
}
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[/] [or1k/] [tags/] [start/] [gdb-5.0/] [opcodes/] [arm-dis.c] - Blame information for rev 1778

Line No.	Rev	Author	Line
1	106	markom	`/* Instruction printing code for the ARM`
2			`Copyright (C) 1994, 95, 96, 97, 98, 99, 2000 Free Software Foundation, Inc.`
3			`Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)`
4			`Modification by James G. Smith (jsmith@cygnus.co.uk)`
5
6			`This file is part of libopcodes.`
7
8			`This program is free software; you can redistribute it and/or modify it under`
9			`the terms of the GNU General Public License as published by the Free`
10			`Software Foundation; either version 2 of the License, or (at your option)`
11			`any later version.`
12
13			`This program is distributed in the hope that it will be useful, but WITHOUT`
14			`ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or`
15			`FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for`
16			`more details.`
17
18			`You should have received a copy of the GNU General Public License`
19			`along with this program; if not, write to the Free Software`
20			`Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */`
21
22			`#include "sysdep.h"`
23			`#include "dis-asm.h"`
24			`#define DEFINE_TABLE`
25			`#include "arm-opc.h"`
26			`#include "coff/internal.h"`
27			`#include "libcoff.h"`
28			`#include "opintl.h"`
29
30			`/* FIXME: This shouldn't be done here */`
31			`#include "elf-bfd.h"`
32			`#include "elf/internal.h"`
33			`#include "elf/arm.h"`
34
35			`#ifndef streq`
36			`#define streq(a,b) (strcmp ((a), (b)) == 0)`
37			`#endif`
38
39			`#ifndef strneq`
40			`#define strneq(a,b,n) (strncmp ((a), (b), (n)) == 0)`