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