include/dis-asm.h

   1 /* Interface between the opcode library and its callers.
   2
   3    Copyright 2001 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.
  19
  20    Written by Cygnus Support, 1993.
  21
  22    The opcode library (libopcodes.a) provides instruction decoders for
  23    a large variety of instruction sets, callable with an identical
  24    interface, for making instruction-processing programs more independent
  25    of the instruction set being processed.  */
  26
  27 #ifndef DIS_ASM_H
  28 #define DIS_ASM_H
  29
  30 #ifdef __cplusplus
  31 extern "C" {
  32 #endif
  33
  34 #include <stdio.h>
  35 #include "bfd.h"
  36
  37 typedef int (*fprintf_ftype) PARAMS((PTR, const char*, ...));
  38
  39 enum dis_insn_type {
  40   dis_noninsn,                  /* Not a valid instruction */
  41   dis_nonbranch,                /* Not a branch instruction */
  42   dis_branch,                   /* Unconditional branch */
  43   dis_condbranch,               /* Conditional branch */
  44   dis_jsr,                      /* Jump to subroutine */
  45   dis_condjsr,                  /* Conditional jump to subroutine */
  46   dis_dref,                     /* Data reference instruction */
  47   dis_dref2                     /* Two data references in instruction */
  48 };
  49
  50 /* This struct is passed into the instruction decoding routine,
  51    and is passed back out into each callback.  The various fields are used
  52    for conveying information from your main routine into your callbacks,
  53    for passing information into the instruction decoders (such as the
  54    addresses of the callback functions), or for passing information
  55    back from the instruction decoders to their callers.
  56
  57    It must be initialized before it is first passed; this can be done
  58    by hand, or using one of the initialization macros below.  */
  59
  60 typedef struct disassemble_info {
  61   fprintf_ftype fprintf_func;
  62   PTR stream;
  63   PTR application_data;
  64
  65   /* Target description.  We could replace this with a pointer to the bfd,
  66      but that would require one.  There currently isn't any such requirement
  67      so to avoid introducing one we record these explicitly.  */
  68   /* The bfd_flavour.  This can be bfd_target_unknown_flavour.  */
  69   enum bfd_flavour flavour;
  70   /* The bfd_arch value.  */
  71   enum bfd_architecture arch;
  72   /* The bfd_mach value.  */
  73   unsigned long mach;
  74   /* Endianness (for bi-endian cpus).  Mono-endian cpus can ignore this.  */
  75   enum bfd_endian endian;
  76
  77   /* Some targets need information about the current section to accurately
  78      display insns.  If this is NULL, the target disassembler function
  79      will have to make its best guess.  */
  80   asection *section;
  81
  82   /* An array of pointers to symbols either at the location being disassembled
  83      or at the start of the function being disassembled.  The array is sorted
  84      so that the first symbol is intended to be the one used.  The others are
  85      present for any misc. purposes.  This is not set reliably, but if it is
  86      not NULL, it is correct.  */
  87   asymbol **symbols;
  88   /* Number of symbols in array.  */
  89   int num_symbols;
  90
  91   /* For use by the disassembler.
  92      The top 16 bits are reserved for public use (and are documented here).
  93      The bottom 16 bits are for the internal use of the disassembler.  */
  94   unsigned long flags;
  95 #define INSN_HAS_RELOC  0x80000000
  96   PTR private_data;
  97
  98   /* Function used to get bytes to disassemble.  MEMADDR is the
  99      address of the stuff to be disassembled, MYADDR is the address to
 100      put the bytes in, and LENGTH is the number of bytes to read.
 101      INFO is a pointer to this struct.
 102      Returns an errno value or 0 for success.  */
 103   int (*read_memory_func)
 104     PARAMS ((bfd_vma memaddr, bfd_byte *myaddr, unsigned int length,
 105              struct disassemble_info *info));
 106
 107   /* Function which should be called if we get an error that we can't
 108      recover from.  STATUS is the errno value from read_memory_func and
 109      MEMADDR is the address that we were trying to read.  INFO is a
 110      pointer to this struct.  */
 111   void (*memory_error_func)
 112     PARAMS ((int status, bfd_vma memaddr, struct disassemble_info *info));
 113
 114   /* Function called to print ADDR.  */
 115   void (*print_address_func)
 116     PARAMS ((bfd_vma addr, struct disassemble_info *info));
 117
 118   /* Function called to determine if there is a symbol at the given ADDR.
 119      If there is, the function returns 1, otherwise it returns 0.
 120      This is used by ports which support an overlay manager where
 121      the overlay number is held in the top part of an address.  In
 122      some circumstances we want to include the overlay number in the
 123      address, (normally because there is a symbol associated with
 124      that address), but sometimes we want to mask out the overlay bits.  */
 125   int (* symbol_at_address_func)
 126     PARAMS ((bfd_vma addr, struct disassemble_info * info));
 127
 128   /* These are for buffer_read_memory.  */
 129   bfd_byte *buffer;
 130   bfd_vma buffer_vma;
 131   unsigned int buffer_length;
 132
 133   /* This variable may be set by the instruction decoder.  It suggests
 134       the number of bytes objdump should display on a single line.  If
 135       the instruction decoder sets this, it should always set it to
 136       the same value in order to get reasonable looking output.  */
 137   int bytes_per_line;
 138
 139   /* the next two variables control the way objdump displays the raw data */
 140   /* For example, if bytes_per_line is 8 and bytes_per_chunk is 4, the */
 141   /* output will look like this:
 142      00:   00000000 00000000
 143      with the chunks displayed according to "display_endian". */
 144   int bytes_per_chunk;
 145   enum bfd_endian display_endian;
 146
 147   /* Number of octets per incremented target address
 148      Normally one, but some DSPs have byte sizes of 16 or 32 bits
 149    */
 150   unsigned int octets_per_byte;
 151
 152   /* Results from instruction decoders.  Not all decoders yet support
 153      this information.  This info is set each time an instruction is
 154      decoded, and is only valid for the last such instruction.
 155
 156      To determine whether this decoder supports this information, set
 157      insn_info_valid to 0, decode an instruction, then check it.  */
 158
 159   char insn_info_valid;         /* Branch info has been set. */
 160   char branch_delay_insns;      /* How many sequential insn's will run before
 161                                    a branch takes effect.  (0 = normal) */
 162   char data_size;               /* Size of data reference in insn, in bytes */
 163   enum dis_insn_type insn_type; /* Type of instruction */
 164   bfd_vma target;               /* Target address of branch or dref, if known;
 165                                    zero if unknown.  */
 166   bfd_vma target2;              /* Second target address for dref2 */
 167
 168   /* Command line options specific to the target disassembler.  */
 169   char * disassembler_options;
 170
 171 } disassemble_info;
 172
 173 \f
 174 /* Standard disassemblers.  Disassemble one instruction at the given
 175    target address.  Return number of bytes processed.  */
 176 typedef int (*disassembler_ftype)
 177      PARAMS((bfd_vma, disassemble_info *));
 178
 179 extern int print_insn_big_mips          PARAMS ((bfd_vma, disassemble_info*));
 180 extern int print_insn_little_mips       PARAMS ((bfd_vma, disassemble_info*));
 181 extern int print_insn_i386_att          PARAMS ((bfd_vma, disassemble_info*));
 182 extern int print_insn_i386_intel        PARAMS ((bfd_vma, disassemble_info*));
 183 extern int print_insn_ia64              PARAMS ((bfd_vma, disassemble_info*));
 184 extern int print_insn_i370              PARAMS ((bfd_vma, disassemble_info*));
 185 extern int print_insn_m68hc11           PARAMS ((bfd_vma, disassemble_info*));
 186 extern int print_insn_m68hc12           PARAMS ((bfd_vma, disassemble_info*));
 187 extern int print_insn_m68k              PARAMS ((bfd_vma, disassemble_info*));
 188 extern int print_insn_z8001             PARAMS ((bfd_vma, disassemble_info*));
 189 extern int print_insn_z8002             PARAMS ((bfd_vma, disassemble_info*));
 190 extern int print_insn_h8300             PARAMS ((bfd_vma, disassemble_info*));
 191 extern int print_insn_h8300h            PARAMS ((bfd_vma, disassemble_info*));
 192 extern int print_insn_h8300s            PARAMS ((bfd_vma, disassemble_info*));
 193 extern int print_insn_h8500             PARAMS ((bfd_vma, disassemble_info*));
 194 extern int print_insn_alpha             PARAMS ((bfd_vma, disassemble_info*));
 195 extern disassembler_ftype arc_get_disassembler PARAMS ((void *));
 196 extern int print_insn_big_arm           PARAMS ((bfd_vma, disassemble_info*));
 197 extern int print_insn_little_arm        PARAMS ((bfd_vma, disassemble_info*));
 198 extern int print_insn_sparc             PARAMS ((bfd_vma, disassemble_info*));
 199 extern int print_insn_big_a29k          PARAMS ((bfd_vma, disassemble_info*));
 200 extern int print_insn_little_a29k       PARAMS ((bfd_vma, disassemble_info*));
 201 extern int print_insn_i860              PARAMS ((bfd_vma, disassemble_info*));
 202 extern int print_insn_i960              PARAMS ((bfd_vma, disassemble_info*));
 203 extern int print_insn_sh                PARAMS ((bfd_vma, disassemble_info*));
 204 extern int print_insn_shl               PARAMS ((bfd_vma, disassemble_info*));
 205 extern int print_insn_hppa              PARAMS ((bfd_vma, disassemble_info*));
 206 extern int print_insn_fr30              PARAMS ((bfd_vma, disassemble_info*));
 207 extern int print_insn_m32r              PARAMS ((bfd_vma, disassemble_info*));
 208 extern int print_insn_m88k              PARAMS ((bfd_vma, disassemble_info*));
 209 extern int print_insn_mcore             PARAMS ((bfd_vma, disassemble_info*));
 210 extern int print_insn_mn10200           PARAMS ((bfd_vma, disassemble_info*));
 211 extern int print_insn_mn10300           PARAMS ((bfd_vma, disassemble_info*));
 212 extern int print_insn_ns32k             PARAMS ((bfd_vma, disassemble_info*));
 213 extern int print_insn_openrisc          PARAMS ((bfd_vma, disassemble_info*));
 214 extern int print_insn_pdp11             PARAMS ((bfd_vma, disassemble_info*));
 215 extern int print_insn_big_powerpc       PARAMS ((bfd_vma, disassemble_info*));
 216 extern int print_insn_little_powerpc    PARAMS ((bfd_vma, disassemble_info*));
 217 extern int print_insn_rs6000            PARAMS ((bfd_vma, disassemble_info*));
 218 extern int print_insn_w65               PARAMS ((bfd_vma, disassemble_info*));
 219 extern disassembler_ftype cris_get_disassembler PARAMS ((bfd *));
 220 extern int print_insn_d10v              PARAMS ((bfd_vma, disassemble_info*));
 221 extern int print_insn_d30v              PARAMS ((bfd_vma, disassemble_info*));
 222 extern int print_insn_v850              PARAMS ((bfd_vma, disassemble_info*));
 223 extern int print_insn_tic30             PARAMS ((bfd_vma, disassemble_info*));
 224 extern int print_insn_vax               PARAMS ((bfd_vma, disassemble_info*));
 225 extern int print_insn_tic54x            PARAMS ((bfd_vma, disassemble_info*));
 226 extern int print_insn_tic80             PARAMS ((bfd_vma, disassemble_info*));
 227 extern int print_insn_pj                PARAMS ((bfd_vma, disassemble_info*));
 228 extern int print_insn_avr               PARAMS ((bfd_vma, disassemble_info*));
 229 extern int print_insn_s390            PARAMS ((bfd_vma, disassemble_info*));
 230
 231 extern void print_arm_disassembler_options PARAMS ((FILE *));
 232 extern void parse_arm_disassembler_option  PARAMS ((char *));
 233 extern int  get_arm_regname_num_options    PARAMS ((void));
 234 extern int  set_arm_regname_option         PARAMS ((int));
 235 extern int  get_arm_regnames               PARAMS ((int, const char **, const char **, const char ***));
 236
 237 /* Fetch the disassembler for a given BFD, if that support is available.  */
 238 extern disassembler_ftype disassembler  PARAMS ((bfd *));
 239
 240 /* Document any target specific options available from the disassembler.  */
 241 extern void disassembler_usage          PARAMS ((FILE *));
 242
 243 \f
 244 /* This block of definitions is for particular callers who read instructions
 245    into a buffer before calling the instruction decoder.  */
 246
 247 /* Here is a function which callers may wish to use for read_memory_func.
 248    It gets bytes from a buffer.  */
 249 extern int buffer_read_memory
 250   PARAMS ((bfd_vma, bfd_byte *, unsigned int, struct disassemble_info *));
 251
 252 /* This function goes with buffer_read_memory.
 253    It prints a message using info->fprintf_func and info->stream.  */
 254 extern void perror_memory PARAMS ((int, bfd_vma, struct disassemble_info *));
 255
 256
 257 /* Just print the address in hex.  This is included for completeness even
 258    though both GDB and objdump provide their own (to print symbolic
 259    addresses).  */
 260 extern void generic_print_address
 261   PARAMS ((bfd_vma, struct disassemble_info *));
 262
 263 /* Always true.  */
 264 extern int generic_symbol_at_address
 265   PARAMS ((bfd_vma, struct disassemble_info *));
 266
 267 /* Macro to initialize a disassemble_info struct.  This should be called
 268    by all applications creating such a struct.  */
 269 #define INIT_DISASSEMBLE_INFO(INFO, STREAM, FPRINTF_FUNC) \
 270   (INFO).flavour = bfd_target_unknown_flavour, \
 271   (INFO).arch = bfd_arch_unknown, \
 272   (INFO).mach = 0, \
 273   (INFO).endian = BFD_ENDIAN_UNKNOWN, \
 274   (INFO).octets_per_byte = 1, \
 275   INIT_DISASSEMBLE_INFO_NO_ARCH(INFO, STREAM, FPRINTF_FUNC)
 276
 277 /* Call this macro to initialize only the internal variables for the
 278    disassembler.  Architecture dependent things such as byte order, or machine
 279    variant are not touched by this macro.  This makes things much easier for
 280    GDB which must initialize these things separately.  */
 281
 282 #define INIT_DISASSEMBLE_INFO_NO_ARCH(INFO, STREAM, FPRINTF_FUNC) \
 283   (INFO).fprintf_func = (fprintf_ftype)(FPRINTF_FUNC), \
 284   (INFO).stream = (PTR)(STREAM), \
 285   (INFO).section = NULL, \
 286   (INFO).symbols = NULL, \
 287   (INFO).num_symbols = 0, \
 288   (INFO).private_data = NULL, \
 289   (INFO).buffer = NULL, \
 290   (INFO).buffer_vma = 0, \
 291   (INFO).buffer_length = 0, \
 292   (INFO).read_memory_func = buffer_read_memory, \
 293   (INFO).memory_error_func = perror_memory, \
 294   (INFO).print_address_func = generic_print_address, \
 295   (INFO).symbol_at_address_func = generic_symbol_at_address, \
 296   (INFO).flags = 0, \
 297   (INFO).bytes_per_line = 0, \
 298   (INFO).bytes_per_chunk = 0, \
 299   (INFO).display_endian = BFD_ENDIAN_UNKNOWN, \
 300   (INFO).insn_info_valid = 0
 301
 302 #ifdef __cplusplus
 303 };
 304 #endif
 305
 306 #endif /* ! defined (DIS_ASM_H) */