include/dis-asm.h

   1 /* Interface between the opcode library and its callers.
   2
   3    Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2009, 2010
   4    Free Software Foundation, Inc.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3, or (at your option)
   9    any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 51 Franklin Street - Fifth Floor,
  19    Boston, MA 02110-1301, USA.
  20
  21    Written by Cygnus Support, 1993.
  22
  23    The opcode library (libopcodes.a) provides instruction decoders for
  24    a large variety of instruction sets, callable with an identical
  25    interface, for making instruction-processing programs more independent
  26    of the instruction set being processed.  */
  27
  28 #ifndef DIS_ASM_H
  29 #define DIS_ASM_H
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 #include <stdio.h>
  36 #include "bfd.h"
  37
  38   typedef int (*fprintf_ftype) (void *, const char*, ...) /*ATTRIBUTE_FPTR_PRINTF_2*/;
  39
  40 enum dis_insn_type
  41 {
  42   dis_noninsn,                  /* Not a valid instruction.  */
  43   dis_nonbranch,                /* Not a branch instruction.  */
  44   dis_branch,                   /* Unconditional branch.  */
  45   dis_condbranch,               /* Conditional branch.  */
  46   dis_jsr,                      /* Jump to subroutine.  */
  47   dis_condjsr,                  /* Conditional jump to subroutine.  */
  48   dis_dref,                     /* Data reference instruction.  */
  49   dis_dref2                     /* Two data references in instruction.  */
  50 };
  51
  52 /* This struct is passed into the instruction decoding routine,
  53    and is passed back out into each callback.  The various fields are used
  54    for conveying information from your main routine into your callbacks,
  55    for passing information into the instruction decoders (such as the
  56    addresses of the callback functions), or for passing information
  57    back from the instruction decoders to their callers.
  58
  59    It must be initialized before it is first passed; this can be done
  60    by hand, or using one of the initialization macros below.  */
  61
  62 typedef struct disassemble_info
  63 {
  64   fprintf_ftype fprintf_func;
  65   void *stream;
  66   void *application_data;
  67
  68   /* Target description.  We could replace this with a pointer to the bfd,
  69      but that would require one.  There currently isn't any such requirement
  70      so to avoid introducing one we record these explicitly.  */
  71   /* The bfd_flavour.  This can be bfd_target_unknown_flavour.  */
  72   enum bfd_flavour flavour;
  73   /* The bfd_arch value.  */
  74   enum bfd_architecture arch;
  75   /* The bfd_mach value.  */
  76   unsigned long mach;
  77   /* Endianness (for bi-endian cpus).  Mono-endian cpus can ignore this.  */
  78   enum bfd_endian endian;
  79   /* Endianness of code, for mixed-endian situations such as ARM BE8.  */
  80   enum bfd_endian endian_code;
  81   /* An arch/mach-specific bitmask of selected instruction subsets, mainly
  82      for processors with run-time-switchable instruction sets.  The default,
  83      zero, means that there is no constraint.  CGEN-based opcodes ports
  84      may use ISA_foo masks.  */
  85   void *insn_sets;
  86
  87   /* Some targets need information about the current section to accurately
  88      display insns.  If this is NULL, the target disassembler function
  89      will have to make its best guess.  */
  90   asection *section;
  91
  92   /* An array of pointers to symbols either at the location being disassembled
  93      or at the start of the function being disassembled.  The array is sorted
  94      so that the first symbol is intended to be the one used.  The others are
  95      present for any misc. purposes.  This is not set reliably, but if it is
  96      not NULL, it is correct.  */
  97   asymbol **symbols;
  98   /* Number of symbols in array.  */
  99   int num_symbols;
 100
 101   /* Symbol table provided for targets that want to look at it.  This is
 102      used on Arm to find mapping symbols and determine Arm/Thumb code.  */
 103   asymbol **symtab;
 104   int symtab_pos;
 105   int symtab_size;
 106
 107   /* For use by the disassembler.
 108      The top 16 bits are reserved for public use (and are documented here).
 109      The bottom 16 bits are for the internal use of the disassembler.  */
 110   unsigned long flags;
 111   /* Set if the disassembler has determined that there are one or more
 112      relocations associated with the instruction being disassembled.  */
 113 #define INSN_HAS_RELOC   (1 << 31)
 114   /* Set if the user has requested the disassembly of data as well as code.  */
 115 #define DISASSEMBLE_DATA (1 << 30)
 116   /* Set if the user has specifically set the machine type encoded in the
 117      mach field of this structure.  */
 118 #define USER_SPECIFIED_MACHINE_TYPE (1 << 29)
 119
 120   /* Use internally by the target specific disassembly code.  */
 121   void *private_data;
 122
 123   /* Function used to get bytes to disassemble.  MEMADDR is the
 124      address of the stuff to be disassembled, MYADDR is the address to
 125      put the bytes in, and LENGTH is the number of bytes to read.
 126      INFO is a pointer to this struct.
 127      Returns an errno value or 0 for success.  */
 128   int (*read_memory_func)
 129     (bfd_vma memaddr, bfd_byte *myaddr, unsigned int length,
 130      struct disassemble_info *dinfo);
 131
 132   /* Function which should be called if we get an error that we can't
 133      recover from.  STATUS is the errno value from read_memory_func and
 134      MEMADDR is the address that we were trying to read.  INFO is a
 135      pointer to this struct.  */
 136   void (*memory_error_func)
 137     (int status, bfd_vma memaddr, struct disassemble_info *dinfo);
 138
 139   /* Function called to print ADDR.  */
 140   void (*print_address_func)
 141     (bfd_vma addr, struct disassemble_info *dinfo);
 142
 143   /* Function called to determine if there is a symbol at the given ADDR.
 144      If there is, the function returns 1, otherwise it returns 0.
 145      This is used by ports which support an overlay manager where
 146      the overlay number is held in the top part of an address.  In
 147      some circumstances we want to include the overlay number in the
 148      address, (normally because there is a symbol associated with
 149      that address), but sometimes we want to mask out the overlay bits.  */
 150   int (* symbol_at_address_func)
 151     (bfd_vma addr, struct disassemble_info *dinfo);
 152
 153   /* Function called to check if a SYMBOL is can be displayed to the user.
 154      This is used by some ports that want to hide special symbols when
 155      displaying debugging outout.  */
 156   bfd_boolean (* symbol_is_valid)
 157     (asymbol *, struct disassemble_info *dinfo);
 158
 159   /* These are for buffer_read_memory.  */
 160   bfd_byte *buffer;
 161   bfd_vma buffer_vma;
 162   unsigned int buffer_length;
 163
 164   /* This variable may be set by the instruction decoder.  It suggests
 165       the number of bytes objdump should display on a single line.  If
 166       the instruction decoder sets this, it should always set it to
 167       the same value in order to get reasonable looking output.  */
 168   int bytes_per_line;
 169
 170   /* The next two variables control the way objdump displays the raw data.  */
 171   /* For example, if bytes_per_line is 8 and bytes_per_chunk is 4, the */
 172   /* output will look like this:
 173      00:   00000000 00000000
 174      with the chunks displayed according to "display_endian". */
 175   int bytes_per_chunk;
 176   enum bfd_endian display_endian;
 177
 178   /* Number of octets per incremented target address
 179      Normally one, but some DSPs have byte sizes of 16 or 32 bits.  */
 180   unsigned int octets_per_byte;
 181
 182   /* The number of zeroes we want to see at the end of a section before we
 183      start skipping them.  */
 184   unsigned int skip_zeroes;
 185
 186   /* The number of zeroes to skip at the end of a section.  If the number
 187      of zeroes at the end is between SKIP_ZEROES_AT_END and SKIP_ZEROES,
 188      they will be disassembled.  If there are fewer than
 189      SKIP_ZEROES_AT_END, they will be skipped.  This is a heuristic
 190      attempt to avoid disassembling zeroes inserted by section
 191      alignment.  */
 192   unsigned int skip_zeroes_at_end;
 193
 194   /* Whether the disassembler always needs the relocations.  */
 195   bfd_boolean disassembler_needs_relocs;
 196
 197   /* Results from instruction decoders.  Not all decoders yet support
 198      this information.  This info is set each time an instruction is
 199      decoded, and is only valid for the last such instruction.
 200
 201      To determine whether this decoder supports this information, set
 202      insn_info_valid to 0, decode an instruction, then check it.  */
 203
 204   char insn_info_valid;         /* Branch info has been set. */
 205   char branch_delay_insns;      /* How many sequential insn's will run before
 206                                    a branch takes effect.  (0 = normal) */
 207   char data_size;               /* Size of data reference in insn, in bytes */
 208   enum dis_insn_type insn_type; /* Type of instruction */
 209   bfd_vma target;               /* Target address of branch or dref, if known;
 210                                    zero if unknown.  */
 211   bfd_vma target2;              /* Second target address for dref2 */
 212
 213   /* Command line options specific to the target disassembler.  */
 214   char * disassembler_options;
 215
 216 } disassemble_info;
 217
 218 \f
 219 /* Standard disassemblers.  Disassemble one instruction at the given
 220    target address.  Return number of octets processed.  */
 221 typedef int (*disassembler_ftype) (bfd_vma, disassemble_info *);
 222
 223 extern int print_insn_alpha             (bfd_vma, disassemble_info *);
 224 extern int print_insn_avr               (bfd_vma, disassemble_info *);
 225 extern int print_insn_bfin              (bfd_vma, disassemble_info *);
 226 extern int print_insn_big_arm           (bfd_vma, disassemble_info *);
 227 extern int print_insn_big_mips          (bfd_vma, disassemble_info *);
 228 extern int print_insn_big_or32          (bfd_vma, disassemble_info *);
 229 extern int print_insn_big_powerpc       (bfd_vma, disassemble_info *);
 230 extern int print_insn_big_score         (bfd_vma, disassemble_info *);
 231 extern int print_insn_cr16              (bfd_vma, disassemble_info *);
 232 extern int print_insn_crx               (bfd_vma, disassemble_info *);
 233 extern int print_insn_d10v              (bfd_vma, disassemble_info *);
 234 extern int print_insn_d30v              (bfd_vma, disassemble_info *);
 235 extern int print_insn_dlx               (bfd_vma, disassemble_info *);
 236 extern int print_insn_fr30              (bfd_vma, disassemble_info *);
 237 extern int print_insn_frv               (bfd_vma, disassemble_info *);
 238 extern int print_insn_h8300             (bfd_vma, disassemble_info *);
 239 extern int print_insn_h8300h            (bfd_vma, disassemble_info *);
 240 extern int print_insn_h8300s            (bfd_vma, disassemble_info *);
 241 extern int print_insn_h8500             (bfd_vma, disassemble_info *);
 242 extern int print_insn_hppa              (bfd_vma, disassemble_info *);
 243 extern int print_insn_i370              (bfd_vma, disassemble_info *);
 244 extern int print_insn_i386              (bfd_vma, disassemble_info *);
 245 extern int print_insn_i386_att          (bfd_vma, disassemble_info *);
 246 extern int print_insn_i386_intel        (bfd_vma, disassemble_info *);
 247 extern int print_insn_i860              (bfd_vma, disassemble_info *);
 248 extern int print_insn_i960              (bfd_vma, disassemble_info *);
 249 extern int print_insn_ia64              (bfd_vma, disassemble_info *);
 250 extern int print_insn_ip2k              (bfd_vma, disassemble_info *);
 251 extern int print_insn_iq2000            (bfd_vma, disassemble_info *);
 252 extern int print_insn_little_arm        (bfd_vma, disassemble_info *);
 253 extern int print_insn_little_mips       (bfd_vma, disassemble_info *);
 254 extern int print_insn_little_or32       (bfd_vma, disassemble_info *);
 255 extern int print_insn_little_powerpc    (bfd_vma, disassemble_info *);
 256 extern int print_insn_little_score      (bfd_vma, disassemble_info *);
 257 extern int print_insn_lm32              (bfd_vma, disassemble_info *);
 258 extern int print_insn_m32c              (bfd_vma, disassemble_info *);
 259 extern int print_insn_m32r              (bfd_vma, disassemble_info *);
 260 extern int print_insn_m68hc11           (bfd_vma, disassemble_info *);
 261 extern int print_insn_m68hc12           (bfd_vma, disassemble_info *);
 262 extern int print_insn_m68k              (bfd_vma, disassemble_info *);
 263 extern int print_insn_m88k              (bfd_vma, disassemble_info *);
 264 extern int print_insn_mcore             (bfd_vma, disassemble_info *);
 265 extern int print_insn_mep               (bfd_vma, disassemble_info *);
 266 extern int print_insn_microblaze        (bfd_vma, disassemble_info *);
 267 extern int print_insn_mmix              (bfd_vma, disassemble_info *);
 268 extern int print_insn_mn10200           (bfd_vma, disassemble_info *);
 269 extern int print_insn_mn10300           (bfd_vma, disassemble_info *);
 270 extern int print_insn_moxie             (bfd_vma, disassemble_info *);
 271 extern int print_insn_msp430            (bfd_vma, disassemble_info *);
 272 extern int print_insn_mt                (bfd_vma, disassemble_info *);
 273 extern int print_insn_ns32k             (bfd_vma, disassemble_info *);
 274 extern int print_insn_openrisc          (bfd_vma, disassemble_info *);
 275 extern int print_insn_pdp11             (bfd_vma, disassemble_info *);
 276 extern int print_insn_pj                (bfd_vma, disassemble_info *);
 277 extern int print_insn_rs6000            (bfd_vma, disassemble_info *);
 278 extern int print_insn_s390              (bfd_vma, disassemble_info *);
 279 extern int print_insn_sh                (bfd_vma, disassemble_info *);
 280 extern int print_insn_sh64              (bfd_vma, disassemble_info *);
 281 extern int print_insn_sh64x_media       (bfd_vma, disassemble_info *);
 282 extern int print_insn_sparc             (bfd_vma, disassemble_info *);
 283 extern int print_insn_spu               (bfd_vma, disassemble_info *);
 284 extern int print_insn_tic30             (bfd_vma, disassemble_info *);
 285 extern int print_insn_tic4x             (bfd_vma, disassemble_info *);
 286 extern int print_insn_tic54x            (bfd_vma, disassemble_info *);
 287 extern int print_insn_tic6x             (bfd_vma, disassemble_info *);
 288 extern int print_insn_tic80             (bfd_vma, disassemble_info *);
 289 extern int print_insn_v850              (bfd_vma, disassemble_info *);
 290 extern int print_insn_vax               (bfd_vma, disassemble_info *);
 291 extern int print_insn_w65               (bfd_vma, disassemble_info *);
 292 extern int print_insn_xc16x             (bfd_vma, disassemble_info *);
 293 extern int print_insn_xstormy16         (bfd_vma, disassemble_info *);
 294 extern int print_insn_xtensa            (bfd_vma, disassemble_info *);
 295 extern int print_insn_z80               (bfd_vma, disassemble_info *);
 296 extern int print_insn_z8001             (bfd_vma, disassemble_info *);
 297 extern int print_insn_z8002             (bfd_vma, disassemble_info *);
 298 extern int print_insn_rx                (bfd_vma, disassemble_info *);
 299
 300 extern disassembler_ftype arc_get_disassembler (void *);
 301 extern disassembler_ftype cris_get_disassembler (bfd *);
 302
 303 extern void print_i386_disassembler_options (FILE *);
 304 extern void print_mips_disassembler_options (FILE *);
 305 extern void print_ppc_disassembler_options (FILE *);
 306 extern void print_arm_disassembler_options (FILE *);
 307 extern void parse_arm_disassembler_option (char *);
 308 extern void print_s390_disassembler_options (FILE *);
 309 extern int  get_arm_regname_num_options (void);
 310 extern int  set_arm_regname_option (int);
 311 extern int  get_arm_regnames (int, const char **, const char **, const char *const **);
 312 extern bfd_boolean arm_symbol_is_valid (asymbol *, struct disassemble_info *);
 313
 314 /* Fetch the disassembler for a given BFD, if that support is available.  */
 315 extern disassembler_ftype disassembler (bfd *);
 316
 317 /* Amend the disassemble_info structure as necessary for the target architecture.
 318    Should only be called after initialising the info->arch field.  */
 319 extern void disassemble_init_for_target (struct disassemble_info * dinfo);
 320
 321 /* Document any target specific options available from the disassembler.  */
 322 extern void disassembler_usage (FILE *);
 323
 324 \f
 325 /* This block of definitions is for particular callers who read instructions
 326    into a buffer before calling the instruction decoder.  */
 327
 328 /* Here is a function which callers may wish to use for read_memory_func.
 329    It gets bytes from a buffer.  */
 330 extern int buffer_read_memory
 331   (bfd_vma, bfd_byte *, unsigned int, struct disassemble_info *);
 332
 333 /* This function goes with buffer_read_memory.
 334    It prints a message using info->fprintf_func and info->stream.  */
 335 extern void perror_memory (int, bfd_vma, struct disassemble_info *);
 336
 337
 338 /* Just print the address in hex.  This is included for completeness even
 339    though both GDB and objdump provide their own (to print symbolic
 340    addresses).  */
 341 extern void generic_print_address
 342   (bfd_vma, struct disassemble_info *);
 343
 344 /* Always true.  */
 345 extern int generic_symbol_at_address
 346   (bfd_vma, struct disassemble_info *);
 347
 348 /* Also always true.  */
 349 extern bfd_boolean generic_symbol_is_valid
 350   (asymbol *, struct disassemble_info *);
 351
 352 /* Method to initialize a disassemble_info struct.  This should be
 353    called by all applications creating such a struct.  */
 354 extern void init_disassemble_info (struct disassemble_info *dinfo, void *stream,
 355                                    fprintf_ftype fprintf_func);
 356
 357 /* For compatibility with existing code.  */
 358 #define INIT_DISASSEMBLE_INFO(INFO, STREAM, FPRINTF_FUNC) \
 359   init_disassemble_info (&(INFO), (STREAM), (fprintf_ftype) (FPRINTF_FUNC))
 360 #define INIT_DISASSEMBLE_INFO_NO_ARCH(INFO, STREAM, FPRINTF_FUNC) \
 361   init_disassemble_info (&(INFO), (STREAM), (fprintf_ftype) (FPRINTF_FUNC))
 362
 363
 364 #ifdef __cplusplus
 365 }
 366 #endif
 367
 368 #endif /* ! defined (DIS_ASM_H) */