include/dis-asm.h

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