gdb/gdbarch.sh

   1 #!/bin/sh -u
   2
   3 # Architecture commands for GDB, the GNU debugger.
   4 #
   5 # Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free
   6 # Software Foundation, Inc.
   7 #
   8 # This file is part of GDB.
   9 #
  10 # This program is free software; you can redistribute it and/or modify
  11 # it under the terms of the GNU General Public License as published by
  12 # the Free Software Foundation; either version 2 of the License, or
  13 # (at your option) any later version.
  14 #
  15 # This program is distributed in the hope that it will be useful,
  16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 # GNU General Public License for more details.
  19 #
  20 # You should have received a copy of the GNU General Public License
  21 # along with this program; if not, write to the Free Software
  22 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  23
  24 # Make certain that the script is running in an internationalized
  25 # environment.
  26 LANG=c ; export LANG
  27 LC_ALL=c ; export LC_ALL
  28
  29
  30 compare_new ()
  31 {
  32     file=$1
  33     if test ! -r ${file}
  34     then
  35         echo "${file} missing? cp new-${file} ${file}" 1>&2
  36     elif diff -u ${file} new-${file}
  37     then
  38         echo "${file} unchanged" 1>&2
  39     else
  40         echo "${file} has changed? cp new-${file} ${file}" 1>&2
  41     fi
  42 }
  43
  44
  45 # Format of the input table
  46 read="class macro returntype function formal actual staticdefault predefault postdefault invalid_p print garbage_at_eol"
  47
  48 do_read ()
  49 {
  50     comment=""
  51     class=""
  52     while read line
  53     do
  54         if test "${line}" = ""
  55         then
  56             continue
  57         elif test "${line}" = "#" -a "${comment}" = ""
  58         then
  59             continue
  60         elif expr "${line}" : "#" > /dev/null
  61         then
  62             comment="${comment}
  63 ${line}"
  64         else
  65
  66             # The semantics of IFS varies between different SH's.  Some
  67             # treat ``::' as three fields while some treat it as just too.
  68             # Work around this by eliminating ``::'' ....
  69             line="`echo "${line}" | sed -e 's/::/: :/g' -e 's/::/: :/g'`"
  70
  71             OFS="${IFS}" ; IFS="[:]"
  72             eval read ${read} <<EOF
  73 ${line}
  74 EOF
  75             IFS="${OFS}"
  76
  77             if test -n "${garbage_at_eol}"
  78             then
  79                 echo "Garbage at end-of-line in ${line}" 1>&2
  80                 kill $$
  81                 exit 1
  82             fi
  83
  84             # .... and then going back through each field and strip out those
  85             # that ended up with just that space character.
  86             for r in ${read}
  87             do
  88                 if eval test \"\${${r}}\" = \"\ \"
  89                 then
  90                     eval ${r}=""
  91                 fi
  92             done
  93
  94             FUNCTION=`echo ${function} | tr '[a-z]' '[A-Z]'`
  95             if test "x${macro}" = "x="
  96             then
  97                 # Provide a UCASE version of function (for when there isn't MACRO)
  98                 macro="${FUNCTION}"
  99             elif test "${macro}" = "${FUNCTION}"
 100             then
 101                 echo "${function}: Specify = for macro field" 1>&2
 102                 kill $$
 103                 exit 1
 104             fi
 105
 106             # Check that macro definition wasn't supplied for multi-arch
 107             case "${class}" in
 108                 [mM] )
 109                     if test "${macro}" != ""
 110                     then
 111                         echo "Error: Function ${function} multi-arch yet macro ${macro} supplied" 1>&2
 112                         kill $$
 113                         exit 1
 114                     fi
 115             esac
 116
 117             case "${class}" in
 118                 m ) staticdefault="${predefault}" ;;
 119                 M ) staticdefault="0" ;;
 120                 * ) test "${staticdefault}" || staticdefault=0 ;;
 121             esac
 122
 123             case "${class}" in
 124             F | V | M )
 125                 case "${invalid_p}" in
 126                 "" )
 127                     if test -n "${predefault}"
 128                     then
 129                         #invalid_p="gdbarch->${function} == ${predefault}"
 130                         predicate="gdbarch->${function} != ${predefault}"
 131                     elif class_is_variable_p
 132                     then
 133                         predicate="gdbarch->${function} != 0"
 134                     elif class_is_function_p
 135                     then
 136                         predicate="gdbarch->${function} != NULL"
 137                     fi
 138                     ;;
 139                 * )
 140                     echo "Predicate function ${function} with invalid_p." 1>&2
 141                     kill $$
 142                     exit 1
 143                     ;;
 144                 esac
 145             esac
 146
 147             # PREDEFAULT is a valid fallback definition of MEMBER when
 148             # multi-arch is not enabled.  This ensures that the
 149             # default value, when multi-arch is the same as the
 150             # default value when not multi-arch.  POSTDEFAULT is
 151             # always a valid definition of MEMBER as this again
 152             # ensures consistency.
 153
 154             if [ -n "${postdefault}" ]
 155             then
 156                 fallbackdefault="${postdefault}"
 157             elif [ -n "${predefault}" ]
 158             then
 159                 fallbackdefault="${predefault}"
 160             else
 161                 fallbackdefault="0"
 162             fi
 163
 164             #NOT YET: See gdbarch.log for basic verification of
 165             # database
 166
 167             break
 168         fi
 169     done
 170     if [ -n "${class}" ]
 171     then
 172         true
 173     else
 174         false
 175     fi
 176 }
 177
 178
 179 fallback_default_p ()
 180 {
 181     [ -n "${postdefault}" -a "x${invalid_p}" != "x0" ] \
 182         || [ -n "${predefault}" -a "x${invalid_p}" = "x0" ]
 183 }
 184
 185 class_is_variable_p ()
 186 {
 187     case "${class}" in
 188         *v* | *V* ) true ;;
 189         * ) false ;;
 190     esac
 191 }
 192
 193 class_is_function_p ()
 194 {
 195     case "${class}" in
 196         *f* | *F* | *m* | *M* ) true ;;
 197         * ) false ;;
 198     esac
 199 }
 200
 201 class_is_multiarch_p ()
 202 {
 203     case "${class}" in
 204         *m* | *M* ) true ;;
 205         * ) false ;;
 206     esac
 207 }
 208
 209 class_is_predicate_p ()
 210 {
 211     case "${class}" in
 212         *F* | *V* | *M* ) true ;;
 213         * ) false ;;
 214     esac
 215 }
 216
 217 class_is_info_p ()
 218 {
 219     case "${class}" in
 220         *i* ) true ;;
 221         * ) false ;;
 222     esac
 223 }
 224
 225
 226 # dump out/verify the doco
 227 for field in ${read}
 228 do
 229   case ${field} in
 230
 231     class ) : ;;
 232
 233         # # -> line disable
 234         # f -> function
 235         #   hiding a function
 236         # F -> function + predicate
 237         #   hiding a function + predicate to test function validity
 238         # v -> variable
 239         #   hiding a variable
 240         # V -> variable + predicate
 241         #   hiding a variable + predicate to test variables validity
 242         # i -> set from info
 243         #   hiding something from the ``struct info'' object
 244         # m -> multi-arch function
 245         #   hiding a multi-arch function (parameterised with the architecture)
 246         # M -> multi-arch function + predicate
 247         #   hiding a multi-arch function + predicate to test function validity
 248
 249     macro ) : ;;
 250
 251         # The name of the legacy C macro by which this method can be
 252         # accessed.  If empty, no macro is defined.  If "=", a macro
 253         # formed from the upper-case function name is used.
 254
 255     returntype ) : ;;
 256
 257         # For functions, the return type; for variables, the data type
 258
 259     function ) : ;;
 260
 261         # For functions, the member function name; for variables, the
 262         # variable name.  Member function names are always prefixed with
 263         # ``gdbarch_'' for name-space purity.
 264
 265     formal ) : ;;
 266
 267         # The formal argument list.  It is assumed that the formal
 268         # argument list includes the actual name of each list element.
 269         # A function with no arguments shall have ``void'' as the
 270         # formal argument list.
 271
 272     actual ) : ;;
 273
 274         # The list of actual arguments.  The arguments specified shall
 275         # match the FORMAL list given above.  Functions with out
 276         # arguments leave this blank.
 277
 278     staticdefault ) : ;;
 279
 280         # To help with the GDB startup a static gdbarch object is
 281         # created.  STATICDEFAULT is the value to insert into that
 282         # static gdbarch object.  Since this a static object only
 283         # simple expressions can be used.
 284
 285         # If STATICDEFAULT is empty, zero is used.
 286
 287     predefault ) : ;;
 288
 289         # An initial value to assign to MEMBER of the freshly
 290         # malloc()ed gdbarch object.  After initialization, the
 291         # freshly malloc()ed object is passed to the target
 292         # architecture code for further updates.
 293
 294         # If PREDEFAULT is empty, zero is used.
 295
 296         # A non-empty PREDEFAULT, an empty POSTDEFAULT and a zero
 297         # INVALID_P are specified, PREDEFAULT will be used as the
 298         # default for the non- multi-arch target.
 299
 300         # A zero PREDEFAULT function will force the fallback to call
 301         # internal_error().
 302
 303         # Variable declarations can refer to ``gdbarch'' which will
 304         # contain the current architecture.  Care should be taken.
 305
 306     postdefault ) : ;;
 307
 308         # A value to assign to MEMBER of the new gdbarch object should
 309         # the target architecture code fail to change the PREDEFAULT
 310         # value.
 311
 312         # If POSTDEFAULT is empty, no post update is performed.
 313
 314         # If both INVALID_P and POSTDEFAULT are non-empty then
 315         # INVALID_P will be used to determine if MEMBER should be
 316         # changed to POSTDEFAULT.
 317
 318         # If a non-empty POSTDEFAULT and a zero INVALID_P are
 319         # specified, POSTDEFAULT will be used as the default for the
 320         # non- multi-arch target (regardless of the value of
 321         # PREDEFAULT).
 322
 323         # You cannot specify both a zero INVALID_P and a POSTDEFAULT.
 324
 325         # Variable declarations can refer to ``current_gdbarch'' which
 326         # will contain the current architecture.  Care should be
 327         # taken.
 328
 329     invalid_p ) : ;;
 330
 331         # A predicate equation that validates MEMBER.  Non-zero is
 332         # returned if the code creating the new architecture failed to
 333         # initialize MEMBER or the initialized the member is invalid.
 334         # If POSTDEFAULT is non-empty then MEMBER will be updated to
 335         # that value.  If POSTDEFAULT is empty then internal_error()
 336         # is called.
 337
 338         # If INVALID_P is empty, a check that MEMBER is no longer
 339         # equal to PREDEFAULT is used.
 340
 341         # The expression ``0'' disables the INVALID_P check making
 342         # PREDEFAULT a legitimate value.
 343
 344         # See also PREDEFAULT and POSTDEFAULT.
 345
 346     print ) : ;;
 347
 348         # An optional expression that convers MEMBER to a value
 349         # suitable for formatting using %s.
 350
 351         # If PRINT is empty, paddr_nz (for CORE_ADDR) or paddr_d
 352         # (anything else) is used.
 353
 354     garbage_at_eol ) : ;;
 355
 356         # Catches stray fields.
 357
 358     *)
 359         echo "Bad field ${field}"
 360         exit 1;;
 361   esac
 362 done
 363
 364
 365 function_list ()
 366 {
 367   # See below (DOCO) for description of each field
 368   cat <<EOF
 369 i:TARGET_ARCHITECTURE:const struct bfd_arch_info *:bfd_arch_info:::&bfd_default_arch_struct::::TARGET_ARCHITECTURE->printable_name
 370 #
 371 i:TARGET_BYTE_ORDER:int:byte_order:::BFD_ENDIAN_BIG
 372 #
 373 i:TARGET_OSABI:enum gdb_osabi:osabi:::GDB_OSABI_UNKNOWN
 374 # Number of bits in a char or unsigned char for the target machine.
 375 # Just like CHAR_BIT in <limits.h> but describes the target machine.
 376 # v:TARGET_CHAR_BIT:int:char_bit::::8 * sizeof (char):8::0:
 377 #
 378 # Number of bits in a short or unsigned short for the target machine.
 379 v:TARGET_SHORT_BIT:int:short_bit:::8 * sizeof (short):2*TARGET_CHAR_BIT::0
 380 # Number of bits in an int or unsigned int for the target machine.
 381 v:TARGET_INT_BIT:int:int_bit:::8 * sizeof (int):4*TARGET_CHAR_BIT::0
 382 # Number of bits in a long or unsigned long for the target machine.
 383 v:TARGET_LONG_BIT:int:long_bit:::8 * sizeof (long):4*TARGET_CHAR_BIT::0
 384 # Number of bits in a long long or unsigned long long for the target
 385 # machine.
 386 v:TARGET_LONG_LONG_BIT:int:long_long_bit:::8 * sizeof (LONGEST):2*TARGET_LONG_BIT::0
 387
 388 # The ABI default bit-size and format for "float", "double", and "long
 389 # double".  These bit/format pairs should eventually be combined into
 390 # a single object.  For the moment, just initialize them as a pair.
 391
 392 v:TARGET_FLOAT_BIT:int:float_bit:::8 * sizeof (float):4*TARGET_CHAR_BIT::0
 393 v:TARGET_FLOAT_FORMAT:const struct floatformat *:float_format:::::default_float_format (current_gdbarch)::pformat (current_gdbarch->float_format)
 394 v:TARGET_DOUBLE_BIT:int:double_bit:::8 * sizeof (double):8*TARGET_CHAR_BIT::0
 395 v:TARGET_DOUBLE_FORMAT:const struct floatformat *:double_format:::::default_double_format (current_gdbarch)::pformat (current_gdbarch->double_format)
 396 v:TARGET_LONG_DOUBLE_BIT:int:long_double_bit:::8 * sizeof (long double):8*TARGET_CHAR_BIT::0
 397 v:TARGET_LONG_DOUBLE_FORMAT:const struct floatformat *:long_double_format:::::default_double_format (current_gdbarch)::pformat (current_gdbarch->long_double_format)
 398
 399 # For most targets, a pointer on the target and its representation as an
 400 # address in GDB have the same size and "look the same".  For such a
 401 # target, you need only set TARGET_PTR_BIT / ptr_bit and TARGET_ADDR_BIT
 402 # / addr_bit will be set from it.
 403 #
 404 # If TARGET_PTR_BIT and TARGET_ADDR_BIT are different, you'll probably
 405 # also need to set POINTER_TO_ADDRESS and ADDRESS_TO_POINTER as well.
 406 #
 407 # ptr_bit is the size of a pointer on the target
 408 v:TARGET_PTR_BIT:int:ptr_bit:::8 * sizeof (void*):TARGET_INT_BIT::0
 409 # addr_bit is the size of a target address as represented in gdb
 410 v:TARGET_ADDR_BIT:int:addr_bit:::8 * sizeof (void*):0:TARGET_PTR_BIT:
 411 # Number of bits in a BFD_VMA for the target object file format.
 412 v:TARGET_BFD_VMA_BIT:int:bfd_vma_bit:::8 * sizeof (void*):TARGET_ARCHITECTURE->bits_per_address::0
 413 #
 414 # One if \`char' acts like \`signed char', zero if \`unsigned char'.
 415 v:TARGET_CHAR_SIGNED:int:char_signed:::1:-1:1
 416 #
 417 F:TARGET_READ_PC:CORE_ADDR:read_pc:ptid_t ptid:ptid
 418 f:TARGET_WRITE_PC:void:write_pc:CORE_ADDR val, ptid_t ptid:val, ptid:0:generic_target_write_pc::0
 419 # UNWIND_SP is a direct replacement for TARGET_READ_SP.
 420 F:TARGET_READ_SP:CORE_ADDR:read_sp:void
 421 # Function for getting target's idea of a frame pointer.  FIXME: GDB's
 422 # whole scheme for dealing with "frames" and "frame pointers" needs a
 423 # serious shakedown.
 424 f:TARGET_VIRTUAL_FRAME_POINTER:void:virtual_frame_pointer:CORE_ADDR pc, int *frame_regnum, LONGEST *frame_offset:pc, frame_regnum, frame_offset:0:legacy_virtual_frame_pointer::0
 425 #
 426 M::void:pseudo_register_read:struct regcache *regcache, int cookednum, void *buf:regcache, cookednum, buf
 427 M::void:pseudo_register_write:struct regcache *regcache, int cookednum, const void *buf:regcache, cookednum, buf
 428 #
 429 v:=:int:num_regs:::0:-1
 430 # This macro gives the number of pseudo-registers that live in the
 431 # register namespace but do not get fetched or stored on the target.
 432 # These pseudo-registers may be aliases for other registers,
 433 # combinations of other registers, or they may be computed by GDB.
 434 v:=:int:num_pseudo_regs:::0:0::0
 435
 436 # GDB's standard (or well known) register numbers.  These can map onto
 437 # a real register or a pseudo (computed) register or not be defined at
 438 # all (-1).
 439 # SP_REGNUM will hopefully be replaced by UNWIND_SP.
 440 v:=:int:sp_regnum:::-1:-1::0
 441 v:=:int:pc_regnum:::-1:-1::0
 442 v:=:int:ps_regnum:::-1:-1::0
 443 v:=:int:fp0_regnum:::0:-1::0
 444 # Convert stab register number (from \`r\' declaration) to a gdb REGNUM.
 445 f:=:int:stab_reg_to_regnum:int stab_regnr:stab_regnr::no_op_reg_to_regnum::0
 446 # Provide a default mapping from a ecoff register number to a gdb REGNUM.
 447 f:=:int:ecoff_reg_to_regnum:int ecoff_regnr:ecoff_regnr::no_op_reg_to_regnum::0
 448 # Provide a default mapping from a DWARF register number to a gdb REGNUM.
 449 f:=:int:dwarf_reg_to_regnum:int dwarf_regnr:dwarf_regnr::no_op_reg_to_regnum::0
 450 # Convert from an sdb register number to an internal gdb register number.
 451 f:=:int:sdb_reg_to_regnum:int sdb_regnr:sdb_regnr::no_op_reg_to_regnum::0
 452 f:=:int:dwarf2_reg_to_regnum:int dwarf2_regnr:dwarf2_regnr::no_op_reg_to_regnum::0
 453 f:=:const char *:register_name:int regnr:regnr
 454
 455 # REGISTER_TYPE is a direct replacement for DEPRECATED_REGISTER_VIRTUAL_TYPE.
 456 M::struct type *:register_type:int reg_nr:reg_nr
 457 # If the value returned by DEPRECATED_REGISTER_BYTE agrees with the
 458 # register offsets computed using just REGISTER_TYPE, this can be
 459 # deleted.  See: maint print registers.  NOTE: cagney/2002-05-02: This
 460 # function with predicate has a valid (callable) initial value.  As a
 461 # consequence, even when the predicate is false, the corresponding
 462 # function works.  This simplifies the migration process - old code,
 463 # calling DEPRECATED_REGISTER_BYTE, doesn't need to be modified.
 464 F:=:int:deprecated_register_byte:int reg_nr:reg_nr:generic_register_byte:generic_register_byte
 465
 466 # See gdbint.texinfo, and PUSH_DUMMY_CALL.
 467 M::struct frame_id:unwind_dummy_id:struct frame_info *info:info
 468 # Implement UNWIND_DUMMY_ID and PUSH_DUMMY_CALL, then delete
 469 # DEPRECATED_FP_REGNUM.
 470 v:=:int:deprecated_fp_regnum:::-1:-1::0
 471
 472 # See gdbint.texinfo.  See infcall.c.  New, all singing all dancing,
 473 # replacement for DEPRECATED_PUSH_ARGUMENTS.
 474 M::CORE_ADDR:push_dummy_call:struct value *function, struct regcache *regcache, CORE_ADDR bp_addr, int nargs, struct value **args, CORE_ADDR sp, int struct_return, CORE_ADDR struct_addr:function, regcache, bp_addr, nargs, args, sp, struct_return, struct_addr
 475 # PUSH_DUMMY_CALL is a direct replacement for DEPRECATED_PUSH_ARGUMENTS.
 476 F:=:CORE_ADDR:deprecated_push_arguments:int nargs, struct value **args, CORE_ADDR sp, int struct_return, CORE_ADDR struct_addr:nargs, args, sp, struct_return, struct_addr
 477 # DEPRECATED_REGISTER_SIZE can be deleted.
 478 v:=:int:deprecated_register_size
 479 v:=:int:call_dummy_location::::AT_ENTRY_POINT::0
 480 M::CORE_ADDR:push_dummy_code:CORE_ADDR sp, CORE_ADDR funaddr, int using_gcc, struct value **args, int nargs, struct type *value_type, CORE_ADDR *real_pc, CORE_ADDR *bp_addr:sp, funaddr, using_gcc, args, nargs, value_type, real_pc, bp_addr
 481
 482 m::void:print_registers_info:struct ui_file *file, struct frame_info *frame, int regnum, int all:file, frame, regnum, all::default_print_registers_info::0
 483 M::void:print_float_info:struct ui_file *file, struct frame_info *frame, const char *args:file, frame, args
 484 M::void:print_vector_info:struct ui_file *file, struct frame_info *frame, const char *args:file, frame, args
 485 # MAP a GDB RAW register number onto a simulator register number.  See
 486 # also include/...-sim.h.
 487 f:=:int:register_sim_regno:int reg_nr:reg_nr::legacy_register_sim_regno::0
 488 F:=:int:register_bytes_ok:long nr_bytes:nr_bytes
 489 f:=:int:cannot_fetch_register:int regnum:regnum::cannot_register_not::0
 490 f:=:int:cannot_store_register:int regnum:regnum::cannot_register_not::0
 491 # setjmp/longjmp support.
 492 F:=:int:get_longjmp_target:CORE_ADDR *pc:pc
 493 #
 494 v:=:int:believe_pcc_promotion:::::::
 495 #
 496 f:=:int:convert_register_p:int regnum, struct type *type:regnum, type:0:generic_convert_register_p::0
 497 f:=:void:register_to_value:struct frame_info *frame, int regnum, struct type *type, void *buf:frame, regnum, type, buf:0
 498 f:=:void:value_to_register:struct frame_info *frame, int regnum, struct type *type, const void *buf:frame, regnum, type, buf:0
 499 #
 500 f:=:CORE_ADDR:pointer_to_address:struct type *type, const void *buf:type, buf::unsigned_pointer_to_address::0
 501 f:=:void:address_to_pointer:struct type *type, void *buf, CORE_ADDR addr:type, buf, addr::unsigned_address_to_pointer::0
 502 M::CORE_ADDR:integer_to_address:struct type *type, const bfd_byte *buf:type, buf
 503 #
 504 # NOTE: cagney/2003-03-24: Replaced by PUSH_ARGUMENTS.
 505 F:=:void:deprecated_store_struct_return:CORE_ADDR addr, CORE_ADDR sp:addr, sp
 506
 507 # It has been suggested that this, well actually its predecessor,
 508 # should take the type/value of the function to be called and not the
 509 # return type.  This is left as an exercise for the reader.
 510
 511 # NOTE: cagney/2004-06-13: The function stack.c:return_command uses
 512 # the predicate with default hack to avoid calling STORE_RETURN_VALUE
 513 # (via legacy_return_value), when a small struct is involved.
 514
 515 M::enum return_value_convention:return_value:struct type *valtype, struct regcache *regcache, void *readbuf, const void *writebuf:valtype, regcache, readbuf, writebuf::legacy_return_value
 516
 517 # The deprecated methods EXTRACT_RETURN_VALUE, STORE_RETURN_VALUE,
 518 # DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS and
 519 # DEPRECATED_USE_STRUCT_CONVENTION have all been folded into
 520 # RETURN_VALUE.
 521
 522 f:=:void:extract_return_value:struct type *type, struct regcache *regcache, void *valbuf:type, regcache, valbuf::legacy_extract_return_value::0
 523 f:=:void:store_return_value:struct type *type, struct regcache *regcache, const void *valbuf:type, regcache, valbuf::legacy_store_return_value::0
 524 f:=:void:deprecated_extract_return_value:struct type *type, char *regbuf, char *valbuf:type, regbuf, valbuf
 525 f:=:void:deprecated_store_return_value:struct type *type, char *valbuf:type, valbuf
 526 f:=:int:deprecated_use_struct_convention:int gcc_p, struct type *value_type:gcc_p, value_type::generic_use_struct_convention::0
 527
 528 # As of 2004-01-17 only the 32-bit SPARC ABI has been identified as an
 529 # ABI suitable for the implementation of a robust extract
 530 # struct-convention return-value address method (the sparc saves the
 531 # address in the callers frame).  All the other cases so far examined,
 532 # the DEPRECATED_EXTRACT_STRUCT_VALUE implementation has been
 533 # erreneous - the code was incorrectly assuming that the return-value
 534 # address, stored in a register, was preserved across the entire
 535 # function call.
 536
 537 # For the moment retain DEPRECATED_EXTRACT_STRUCT_VALUE as a marker of
 538 # the ABIs that are still to be analyzed - perhaps this should simply
 539 # be deleted.  The commented out extract_returned_value_address method
 540 # is provided as a starting point for the 32-bit SPARC.  It, or
 541 # something like it, along with changes to both infcmd.c and stack.c
 542 # will be needed for that case to work.  NB: It is passed the callers
 543 # frame since it is only after the callee has returned that this
 544 # function is used.
 545
 546 #M::CORE_ADDR:extract_returned_value_address:struct frame_info *caller_frame:caller_frame
 547 F:=:CORE_ADDR:deprecated_extract_struct_value_address:struct regcache *regcache:regcache
 548
 549 #
 550 f:=:CORE_ADDR:skip_prologue:CORE_ADDR ip:ip:0:0
 551 f:=:int:inner_than:CORE_ADDR lhs, CORE_ADDR rhs:lhs, rhs:0:0
 552 f:=:const unsigned char *:breakpoint_from_pc:CORE_ADDR *pcptr, int *lenptr:pcptr, lenptr::0:
 553 M::CORE_ADDR:adjust_breakpoint_address:CORE_ADDR bpaddr:bpaddr
 554 f:=:int:memory_insert_breakpoint:CORE_ADDR addr, char *contents_cache:addr, contents_cache:0:default_memory_insert_breakpoint::0
 555 f:=:int:memory_remove_breakpoint:CORE_ADDR addr, char *contents_cache:addr, contents_cache:0:default_memory_remove_breakpoint::0
 556 v:=:CORE_ADDR:decr_pc_after_break:::0:::0
 557
 558 # A function can be addressed by either it's "pointer" (possibly a
 559 # descriptor address) or "entry point" (first executable instruction).
 560 # The method "convert_from_func_ptr_addr" converting the former to the
 561 # latter.  DEPRECATED_FUNCTION_START_OFFSET is being used to implement
 562 # a simplified subset of that functionality - the function's address
 563 # corresponds to the "function pointer" and the function's start
 564 # corresponds to the "function entry point" - and hence is redundant.
 565
 566 v:=:CORE_ADDR:deprecated_function_start_offset:::0:::0
 567
 568 m::void:remote_translate_xfer_address:struct regcache *regcache, CORE_ADDR gdb_addr, int gdb_len, CORE_ADDR *rem_addr, int *rem_len:regcache, gdb_addr, gdb_len, rem_addr, rem_len::generic_remote_translate_xfer_address::0
 569 #
 570 v:=:CORE_ADDR:frame_args_skip:::0:::0
 571 M::CORE_ADDR:unwind_pc:struct frame_info *next_frame:next_frame
 572 M::CORE_ADDR:unwind_sp:struct frame_info *next_frame:next_frame
 573 # DEPRECATED_FRAME_LOCALS_ADDRESS as been replaced by the per-frame
 574 # frame-base.  Enable frame-base before frame-unwind.
 575 F:=:CORE_ADDR:deprecated_saved_pc_after_call:struct frame_info *frame:frame
 576 F:=:int:frame_num_args:struct frame_info *frame:frame
 577 #
 578 # DEPRECATED_STACK_ALIGN has been replaced by an initial aligning call
 579 # to frame_align and the requirement that methods such as
 580 # push_dummy_call and frame_red_zone_size maintain correct stack/frame
 581 # alignment.
 582 F:=:CORE_ADDR:deprecated_stack_align:CORE_ADDR sp:sp
 583 M::CORE_ADDR:frame_align:CORE_ADDR address:address
 584 # DEPRECATED_REG_STRUCT_HAS_ADDR has been replaced by
 585 # stabs_argument_has_addr.
 586 F:=:int:deprecated_reg_struct_has_addr:int gcc_p, struct type *type:gcc_p, type
 587 m::int:stabs_argument_has_addr:struct type *type:type::default_stabs_argument_has_addr::0
 588 v:=:int:frame_red_zone_size
 589 #
 590 m::CORE_ADDR:convert_from_func_ptr_addr:CORE_ADDR addr, struct target_ops *targ:addr, targ::convert_from_func_ptr_addr_identity::0
 591 # On some machines there are bits in addresses which are not really
 592 # part of the address, but are used by the kernel, the hardware, etc.
 593 # for special purposes.  ADDR_BITS_REMOVE takes out any such bits so
 594 # we get a "real" address such as one would find in a symbol table.
 595 # This is used only for addresses of instructions, and even then I'm
 596 # not sure it's used in all contexts.  It exists to deal with there
 597 # being a few stray bits in the PC which would mislead us, not as some
 598 # sort of generic thing to handle alignment or segmentation (it's
 599 # possible it should be in TARGET_READ_PC instead).
 600 f:=:CORE_ADDR:addr_bits_remove:CORE_ADDR addr:addr::core_addr_identity::0
 601 # It is not at all clear why SMASH_TEXT_ADDRESS is not folded into
 602 # ADDR_BITS_REMOVE.
 603 f:=:CORE_ADDR:smash_text_address:CORE_ADDR addr:addr::core_addr_identity::0
 604 # FIXME/cagney/2001-01-18: This should be split in two.  A target method that indicates if
 605 # the target needs software single step.  An ISA method to implement it.
 606 #
 607 # FIXME/cagney/2001-01-18: This should be replaced with something that inserts breakpoints
 608 # using the breakpoint system instead of blatting memory directly (as with rs6000).
 609 #
 610 # FIXME/cagney/2001-01-18: The logic is backwards.  It should be asking if the target can
 611 # single step.  If not, then implement single step using breakpoints.
 612 F:=:void:software_single_step:enum target_signal sig, int insert_breakpoints_p:sig, insert_breakpoints_p
 613 # Return non-zero if the processor is executing a delay slot and a
 614 # further single-step is needed before the instruction finishes.
 615 M::int:single_step_through_delay:struct frame_info *frame:frame
 616 # FIXME: cagney/2003-08-28: Need to find a better way of selecting the
 617 # disassembler.  Perhaps objdump can handle it?
 618 f:TARGET_PRINT_INSN:int:print_insn:bfd_vma vma, struct disassemble_info *info:vma, info::0:
 619 f:=:CORE_ADDR:skip_trampoline_code:CORE_ADDR pc:pc::generic_skip_trampoline_code::0
 620
 621
 622 # If IN_SOLIB_DYNSYM_RESOLVE_CODE returns true, and SKIP_SOLIB_RESOLVER
 623 # evaluates non-zero, this is the address where the debugger will place
 624 # a step-resume breakpoint to get us past the dynamic linker.
 625 m::CORE_ADDR:skip_solib_resolver:CORE_ADDR pc:pc::generic_skip_solib_resolver::0
 626 # Some systems also have trampoline code for returning from shared libs.
 627 f:=:int:in_solib_return_trampoline:CORE_ADDR pc, char *name:pc, name::generic_in_solib_return_trampoline::0
 628
 629 # A target might have problems with watchpoints as soon as the stack
 630 # frame of the current function has been destroyed.  This mostly happens
 631 # as the first action in a funtion's epilogue.  in_function_epilogue_p()
 632 # is defined to return a non-zero value if either the given addr is one
 633 # instruction after the stack destroying instruction up to the trailing
 634 # return instruction or if we can figure out that the stack frame has
 635 # already been invalidated regardless of the value of addr.  Targets
 636 # which don't suffer from that problem could just let this functionality
 637 # untouched.
 638 m::int:in_function_epilogue_p:CORE_ADDR addr:addr:0:generic_in_function_epilogue_p::0
 639 # Given a vector of command-line arguments, return a newly allocated
 640 # string which, when passed to the create_inferior function, will be
 641 # parsed (on Unix systems, by the shell) to yield the same vector.
 642 # This function should call error() if the argument vector is not
 643 # representable for this target or if this target does not support
 644 # command-line arguments.
 645 # ARGC is the number of elements in the vector.
 646 # ARGV is an array of strings, one per argument.
 647 m::char *:construct_inferior_arguments:int argc, char **argv:argc, argv::construct_inferior_arguments::0
 648 f:=:void:elf_make_msymbol_special:asymbol *sym, struct minimal_symbol *msym:sym, msym::default_elf_make_msymbol_special::0
 649 f:=:void:coff_make_msymbol_special:int val, struct minimal_symbol *msym:val, msym::default_coff_make_msymbol_special::0
 650 v:=:const char *:name_of_malloc:::"malloc":"malloc"::0:NAME_OF_MALLOC
 651 v:=:int:cannot_step_breakpoint:::0:0::0
 652 v:=:int:have_nonsteppable_watchpoint:::0:0::0
 653 F:=:int:address_class_type_flags:int byte_size, int dwarf2_addr_class:byte_size, dwarf2_addr_class
 654 M::const char *:address_class_type_flags_to_name:int type_flags:type_flags
 655 M::int:address_class_name_to_type_flags:const char *name, int *type_flags_ptr:name, type_flags_ptr
 656 # Is a register in a group
 657 m::int:register_reggroup_p:int regnum, struct reggroup *reggroup:regnum, reggroup::default_register_reggroup_p::0
 658 # Fetch the pointer to the ith function argument.
 659 F:=:CORE_ADDR:fetch_pointer_argument:struct frame_info *frame, int argi, struct type *type:frame, argi, type
 660
 661 # Return the appropriate register set for a core file section with
 662 # name SECT_NAME and size SECT_SIZE.
 663 M::const struct regset *:regset_from_core_section:const char *sect_name, size_t sect_size:sect_name, sect_size
 664 EOF
 665 }
 666
 667 #
 668 # The .log file
 669 #
 670 exec > new-gdbarch.log
 671 function_list | while do_read
 672 do
 673     cat <<EOF
 674 ${class} ${returntype} ${function} ($formal)
 675 EOF
 676     for r in ${read}
 677     do
 678         eval echo \"\ \ \ \ ${r}=\${${r}}\"
 679     done
 680     if class_is_predicate_p && fallback_default_p
 681     then
 682         echo "Error: predicate function ${function} can not have a non- multi-arch default" 1>&2
 683         kill $$
 684         exit 1
 685     fi
 686     if [ "x${invalid_p}" = "x0" -a -n "${postdefault}" ]
 687     then
 688         echo "Error: postdefault is useless when invalid_p=0" 1>&2
 689         kill $$
 690         exit 1
 691     fi
 692     if class_is_multiarch_p
 693     then
 694         if class_is_predicate_p ; then :
 695         elif test "x${predefault}" = "x"
 696         then
 697             echo "Error: pure multi-arch function ${function} must have a predefault" 1>&2
 698             kill $$
 699             exit 1
 700         fi
 701     fi
 702     echo ""
 703 done
 704
 705 exec 1>&2
 706 compare_new gdbarch.log
 707
 708
 709 copyright ()
 710 {
 711 cat <<EOF
 712 /* *INDENT-OFF* */ /* THIS FILE IS GENERATED */
 713
 714 /* Dynamic architecture support for GDB, the GNU debugger.
 715
 716    Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free
 717    Software Foundation, Inc.
 718
 719    This file is part of GDB.
 720
 721    This program is free software; you can redistribute it and/or modify
 722    it under the terms of the GNU General Public License as published by
 723    the Free Software Foundation; either version 2 of the License, or
 724    (at your option) any later version.
 725
 726    This program is distributed in the hope that it will be useful,
 727    but WITHOUT ANY WARRANTY; without even the implied warranty of
 728    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 729    GNU General Public License for more details.
 730
 731    You should have received a copy of the GNU General Public License
 732    along with this program; if not, write to the Free Software
 733    Foundation, Inc., 59 Temple Place - Suite 330,
 734    Boston, MA 02111-1307, USA.  */
 735
 736 /* This file was created with the aid of \`\`gdbarch.sh''.
 737
 738    The Bourne shell script \`\`gdbarch.sh'' creates the files
 739    \`\`new-gdbarch.c'' and \`\`new-gdbarch.h and then compares them
 740    against the existing \`\`gdbarch.[hc]''.  Any differences found
 741    being reported.
 742
 743    If editing this file, please also run gdbarch.sh and merge any
 744    changes into that script. Conversely, when making sweeping changes
 745    to this file, modifying gdbarch.sh and using its output may prove
 746    easier. */
 747
 748 EOF
 749 }
 750
 751 #
 752 # The .h file
 753 #
 754
 755 exec > new-gdbarch.h
 756 copyright
 757 cat <<EOF
 758 #ifndef GDBARCH_H
 759 #define GDBARCH_H
 760
 761 struct floatformat;
 762 struct ui_file;
 763 struct frame_info;
 764 struct value;
 765 struct objfile;
 766 struct minimal_symbol;
 767 struct regcache;
 768 struct reggroup;
 769 struct regset;
 770 struct disassemble_info;
 771 struct target_ops;
 772 struct obstack;
 773
 774 extern struct gdbarch *current_gdbarch;
 775 EOF
 776
 777 # function typedef's
 778 printf "\n"
 779 printf "\n"
 780 printf "/* The following are pre-initialized by GDBARCH. */\n"
 781 function_list | while do_read
 782 do
 783     if class_is_info_p
 784     then
 785         printf "\n"
 786         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 787         printf "/* set_gdbarch_${function}() - not applicable - pre-initialized. */\n"
 788         if test -n "${macro}"
 789         then
 790             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 791             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 792             printf "#endif\n"
 793             printf "#if !defined (${macro})\n"
 794             printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 795             printf "#endif\n"
 796         fi
 797     fi
 798 done
 799
 800 # function typedef's
 801 printf "\n"
 802 printf "\n"
 803 printf "/* The following are initialized by the target dependent code. */\n"
 804 function_list | while do_read
 805 do
 806     if [ -n "${comment}" ]
 807     then
 808         echo "${comment}" | sed \
 809             -e '2 s,#,/*,' \
 810             -e '3,$ s,#,  ,' \
 811             -e '$ s,$, */,'
 812     fi
 813
 814     if class_is_predicate_p
 815     then
 816         if test -n "${macro}"
 817         then
 818             printf "\n"
 819             printf "#if defined (${macro})\n"
 820             printf "/* Legacy for systems yet to multi-arch ${macro} */\n"
 821             printf "#if !defined (${macro}_P)\n"
 822             printf "#define ${macro}_P() (1)\n"
 823             printf "#endif\n"
 824             printf "#endif\n"
 825         fi
 826         printf "\n"
 827         printf "extern int gdbarch_${function}_p (struct gdbarch *gdbarch);\n"
 828         if test -n "${macro}"
 829         then
 830             printf "#if !defined (GDB_TM_FILE) && defined (${macro}_P)\n"
 831             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 832             printf "#endif\n"
 833             printf "#if !defined (${macro}_P)\n"
 834             printf "#define ${macro}_P() (gdbarch_${function}_p (current_gdbarch))\n"
 835             printf "#endif\n"
 836         fi
 837     fi
 838     if class_is_variable_p
 839     then
 840         printf "\n"
 841         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 842         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, ${returntype} ${function});\n"
 843         if test -n "${macro}"
 844         then
 845             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 846             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 847             printf "#endif\n"
 848             printf "#if !defined (${macro})\n"
 849             printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 850             printf "#endif\n"
 851         fi
 852     fi
 853     if class_is_function_p
 854     then
 855         printf "\n"
 856         if [ "x${formal}" = "xvoid" ] && class_is_multiarch_p
 857         then
 858             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch);\n"
 859         elif class_is_multiarch_p
 860         then
 861             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch, ${formal});\n"
 862         else
 863             printf "typedef ${returntype} (gdbarch_${function}_ftype) (${formal});\n"
 864         fi
 865         if [ "x${formal}" = "xvoid" ]
 866         then
 867           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 868         else
 869           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch, ${formal});\n"
 870         fi
 871         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, gdbarch_${function}_ftype *${function});\n"
 872         if test -n "${macro}"
 873         then
 874             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 875             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 876             printf "#endif\n"
 877             if [ "x${actual}" = "x" ]
 878             then
 879                 d="#define ${macro}() (gdbarch_${function} (current_gdbarch))"
 880             elif [ "x${actual}" = "x-" ]
 881             then
 882                 d="#define ${macro} (gdbarch_${function} (current_gdbarch))"
 883             else
 884                 d="#define ${macro}(${actual}) (gdbarch_${function} (current_gdbarch, ${actual}))"
 885             fi
 886             printf "#if !defined (${macro})\n"
 887             if [ "x${actual}" = "x" ]
 888             then
 889                 printf "#define ${macro}() (gdbarch_${function} (current_gdbarch))\n"
 890             elif [ "x${actual}" = "x-" ]
 891             then
 892                 printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 893             else
 894                 printf "#define ${macro}(${actual}) (gdbarch_${function} (current_gdbarch, ${actual}))\n"
 895             fi
 896             printf "#endif\n"
 897         fi
 898     fi
 899 done
 900
 901 # close it off
 902 cat <<EOF
 903
 904 extern struct gdbarch_tdep *gdbarch_tdep (struct gdbarch *gdbarch);
 905
 906
 907 /* Mechanism for co-ordinating the selection of a specific
 908    architecture.
 909
 910    GDB targets (*-tdep.c) can register an interest in a specific
 911    architecture.  Other GDB components can register a need to maintain
 912    per-architecture data.
 913
 914    The mechanisms below ensures that there is only a loose connection
 915    between the set-architecture command and the various GDB
 916    components.  Each component can independently register their need
 917    to maintain architecture specific data with gdbarch.
 918
 919    Pragmatics:
 920
 921    Previously, a single TARGET_ARCHITECTURE_HOOK was provided.  It
 922    didn't scale.
 923
 924    The more traditional mega-struct containing architecture specific
 925    data for all the various GDB components was also considered.  Since
 926    GDB is built from a variable number of (fairly independent)
 927    components it was determined that the global aproach was not
 928    applicable. */
 929
 930
 931 /* Register a new architectural family with GDB.
 932
 933    Register support for the specified ARCHITECTURE with GDB.  When
 934    gdbarch determines that the specified architecture has been
 935    selected, the corresponding INIT function is called.
 936
 937    --
 938
 939    The INIT function takes two parameters: INFO which contains the
 940    information available to gdbarch about the (possibly new)
 941    architecture; ARCHES which is a list of the previously created
 942    \`\`struct gdbarch'' for this architecture.
 943
 944    The INFO parameter is, as far as possible, be pre-initialized with
 945    information obtained from INFO.ABFD or the previously selected
 946    architecture.
 947
 948    The ARCHES parameter is a linked list (sorted most recently used)
 949    of all the previously created architures for this architecture
 950    family.  The (possibly NULL) ARCHES->gdbarch can used to access
 951    values from the previously selected architecture for this
 952    architecture family.  The global \`\`current_gdbarch'' shall not be
 953    used.
 954
 955    The INIT function shall return any of: NULL - indicating that it
 956    doesn't recognize the selected architecture; an existing \`\`struct
 957    gdbarch'' from the ARCHES list - indicating that the new
 958    architecture is just a synonym for an earlier architecture (see
 959    gdbarch_list_lookup_by_info()); a newly created \`\`struct gdbarch''
 960    - that describes the selected architecture (see gdbarch_alloc()).
 961
 962    The DUMP_TDEP function shall print out all target specific values.
 963    Care should be taken to ensure that the function works in both the
 964    multi-arch and non- multi-arch cases. */
 965
 966 struct gdbarch_list
 967 {
 968   struct gdbarch *gdbarch;
 969   struct gdbarch_list *next;
 970 };
 971
 972 struct gdbarch_info
 973 {
 974   /* Use default: NULL (ZERO). */
 975   const struct bfd_arch_info *bfd_arch_info;
 976
 977   /* Use default: BFD_ENDIAN_UNKNOWN (NB: is not ZERO).  */
 978   int byte_order;
 979
 980   /* Use default: NULL (ZERO). */
 981   bfd *abfd;
 982
 983   /* Use default: NULL (ZERO). */
 984   struct gdbarch_tdep_info *tdep_info;
 985
 986   /* Use default: GDB_OSABI_UNINITIALIZED (-1).  */
 987   enum gdb_osabi osabi;
 988 };
 989
 990 typedef struct gdbarch *(gdbarch_init_ftype) (struct gdbarch_info info, struct gdbarch_list *arches);
 991 typedef void (gdbarch_dump_tdep_ftype) (struct gdbarch *gdbarch, struct ui_file *file);
 992
 993 /* DEPRECATED - use gdbarch_register() */
 994 extern void register_gdbarch_init (enum bfd_architecture architecture, gdbarch_init_ftype *);
 995
 996 extern void gdbarch_register (enum bfd_architecture architecture,
 997                               gdbarch_init_ftype *,
 998                               gdbarch_dump_tdep_ftype *);
 999
1000
1001 /* Return a freshly allocated, NULL terminated, array of the valid
1002    architecture names.  Since architectures are registered during the
1003    _initialize phase this function only returns useful information
1004    once initialization has been completed. */
1005
1006 extern const char **gdbarch_printable_names (void);
1007
1008
1009 /* Helper function.  Search the list of ARCHES for a GDBARCH that
1010    matches the information provided by INFO. */
1011
1012 extern struct gdbarch_list *gdbarch_list_lookup_by_info (struct gdbarch_list *arches,  const struct gdbarch_info *info);
1013
1014
1015 /* Helper function.  Create a preliminary \`\`struct gdbarch''.  Perform
1016    basic initialization using values obtained from the INFO andTDEP
1017    parameters.  set_gdbarch_*() functions are called to complete the
1018    initialization of the object. */
1019
1020 extern struct gdbarch *gdbarch_alloc (const struct gdbarch_info *info, struct gdbarch_tdep *tdep);
1021
1022
1023 /* Helper function.  Free a partially-constructed \`\`struct gdbarch''.
1024    It is assumed that the caller freeds the \`\`struct
1025    gdbarch_tdep''. */
1026
1027 extern void gdbarch_free (struct gdbarch *);
1028
1029
1030 /* Helper function.  Allocate memory from the \`\`struct gdbarch''
1031    obstack.  The memory is freed when the corresponding architecture
1032    is also freed.  */
1033
1034 extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
1035 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
1036 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
1037
1038
1039 /* Helper function. Force an update of the current architecture.
1040
1041    The actual architecture selected is determined by INFO, \`\`(gdb) set
1042    architecture'' et.al., the existing architecture and BFD's default
1043    architecture.  INFO should be initialized to zero and then selected
1044    fields should be updated.
1045
1046    Returns non-zero if the update succeeds */
1047
1048 extern int gdbarch_update_p (struct gdbarch_info info);
1049
1050
1051 /* Helper function.  Find an architecture matching info.
1052
1053    INFO should be initialized using gdbarch_info_init, relevant fields
1054    set, and then finished using gdbarch_info_fill.
1055
1056    Returns the corresponding architecture, or NULL if no matching
1057    architecture was found.  "current_gdbarch" is not updated.  */
1058
1059 extern struct gdbarch *gdbarch_find_by_info (struct gdbarch_info info);
1060
1061
1062 /* Helper function.  Set the global "current_gdbarch" to "gdbarch".
1063
1064    FIXME: kettenis/20031124: Of the functions that follow, only
1065    gdbarch_from_bfd is supposed to survive.  The others will
1066    dissappear since in the future GDB will (hopefully) be truly
1067    multi-arch.  However, for now we're still stuck with the concept of
1068    a single active architecture.  */
1069
1070 extern void deprecated_current_gdbarch_select_hack (struct gdbarch *gdbarch);
1071
1072
1073 /* Register per-architecture data-pointer.
1074
1075    Reserve space for a per-architecture data-pointer.  An identifier
1076    for the reserved data-pointer is returned.  That identifer should
1077    be saved in a local static variable.
1078
1079    Memory for the per-architecture data shall be allocated using
1080    gdbarch_obstack_zalloc.  That memory will be deleted when the
1081    corresponding architecture object is deleted.
1082
1083    When a previously created architecture is re-selected, the
1084    per-architecture data-pointer for that previous architecture is
1085    restored.  INIT() is not re-called.
1086
1087    Multiple registrarants for any architecture are allowed (and
1088    strongly encouraged).  */
1089
1090 struct gdbarch_data;
1091
1092 typedef void *(gdbarch_data_pre_init_ftype) (struct obstack *obstack);
1093 extern struct gdbarch_data *gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *init);
1094 typedef void *(gdbarch_data_post_init_ftype) (struct gdbarch *gdbarch);
1095 extern struct gdbarch_data *gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *init);
1096 extern void deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1097                                          struct gdbarch_data *data,
1098                                          void *pointer);
1099
1100 extern void *gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *);
1101
1102
1103
1104 /* Register per-architecture memory region.
1105
1106    Provide a memory-region swap mechanism.  Per-architecture memory
1107    region are created.  These memory regions are swapped whenever the
1108    architecture is changed.  For a new architecture, the memory region
1109    is initialized with zero (0) and the INIT function is called.
1110
1111    Memory regions are swapped / initialized in the order that they are
1112    registered.  NULL DATA and/or INIT values can be specified.
1113
1114    New code should use gdbarch_data_register_*(). */
1115
1116 typedef void (gdbarch_swap_ftype) (void);
1117 extern void deprecated_register_gdbarch_swap (void *data, unsigned long size, gdbarch_swap_ftype *init);
1118 #define DEPRECATED_REGISTER_GDBARCH_SWAP(VAR) deprecated_register_gdbarch_swap (&(VAR), sizeof ((VAR)), NULL)
1119
1120
1121
1122 /* Set the dynamic target-system-dependent parameters (architecture,
1123    byte-order, ...) using information found in the BFD */
1124
1125 extern void set_gdbarch_from_file (bfd *);
1126
1127
1128 /* Initialize the current architecture to the "first" one we find on
1129    our list.  */
1130
1131 extern void initialize_current_architecture (void);
1132
1133 /* gdbarch trace variable */
1134 extern int gdbarch_debug;
1135
1136 extern void gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file);
1137
1138 #endif
1139 EOF
1140 exec 1>&2
1141 #../move-if-change new-gdbarch.h gdbarch.h
1142 compare_new gdbarch.h
1143
1144
1145 #
1146 # C file
1147 #
1148
1149 exec > new-gdbarch.c
1150 copyright
1151 cat <<EOF
1152
1153 #include "defs.h"
1154 #include "arch-utils.h"
1155
1156 #include "gdbcmd.h"
1157 #include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */
1158 #include "symcat.h"
1159
1160 #include "floatformat.h"
1161
1162 #include "gdb_assert.h"
1163 #include "gdb_string.h"
1164 #include "gdb-events.h"
1165 #include "reggroups.h"
1166 #include "osabi.h"
1167 #include "gdb_obstack.h"
1168
1169 /* Static function declarations */
1170
1171 static void alloc_gdbarch_data (struct gdbarch *);
1172
1173 /* Non-zero if we want to trace architecture code.  */
1174
1175 #ifndef GDBARCH_DEBUG
1176 #define GDBARCH_DEBUG 0
1177 #endif
1178 int gdbarch_debug = GDBARCH_DEBUG;
1179
1180 static const char *
1181 pformat (const struct floatformat *format)
1182 {
1183   if (format == NULL)
1184     return "(null)";
1185   else
1186     return  format->name;
1187 }
1188
1189 EOF
1190
1191 # gdbarch open the gdbarch object
1192 printf "\n"
1193 printf "/* Maintain the struct gdbarch object */\n"
1194 printf "\n"
1195 printf "struct gdbarch\n"
1196 printf "{\n"
1197 printf "  /* Has this architecture been fully initialized?  */\n"
1198 printf "  int initialized_p;\n"
1199 printf "\n"
1200 printf "  /* An obstack bound to the lifetime of the architecture.  */\n"
1201 printf "  struct obstack *obstack;\n"
1202 printf "\n"
1203 printf "  /* basic architectural information */\n"
1204 function_list | while do_read
1205 do
1206     if class_is_info_p
1207     then
1208         printf "  ${returntype} ${function};\n"
1209     fi
1210 done
1211 printf "\n"
1212 printf "  /* target specific vector. */\n"
1213 printf "  struct gdbarch_tdep *tdep;\n"
1214 printf "  gdbarch_dump_tdep_ftype *dump_tdep;\n"
1215 printf "\n"
1216 printf "  /* per-architecture data-pointers */\n"
1217 printf "  unsigned nr_data;\n"
1218 printf "  void **data;\n"
1219 printf "\n"
1220 printf "  /* per-architecture swap-regions */\n"
1221 printf "  struct gdbarch_swap *swap;\n"
1222 printf "\n"
1223 cat <<EOF
1224   /* Multi-arch values.
1225
1226      When extending this structure you must:
1227
1228      Add the field below.
1229
1230      Declare set/get functions and define the corresponding
1231      macro in gdbarch.h.
1232
1233      gdbarch_alloc(): If zero/NULL is not a suitable default,
1234      initialize the new field.
1235
1236      verify_gdbarch(): Confirm that the target updated the field
1237      correctly.
1238
1239      gdbarch_dump(): Add a fprintf_unfiltered call so that the new
1240      field is dumped out
1241
1242      \`\`startup_gdbarch()'': Append an initial value to the static
1243      variable (base values on the host's c-type system).
1244
1245      get_gdbarch(): Implement the set/get functions (probably using
1246      the macro's as shortcuts).
1247
1248      */
1249
1250 EOF
1251 function_list | while do_read
1252 do
1253     if class_is_variable_p
1254     then
1255         printf "  ${returntype} ${function};\n"
1256     elif class_is_function_p
1257     then
1258         printf "  gdbarch_${function}_ftype *${function};\n"
1259     fi
1260 done
1261 printf "};\n"
1262
1263 # A pre-initialized vector
1264 printf "\n"
1265 printf "\n"
1266 cat <<EOF
1267 /* The default architecture uses host values (for want of a better
1268    choice). */
1269 EOF
1270 printf "\n"
1271 printf "extern const struct bfd_arch_info bfd_default_arch_struct;\n"
1272 printf "\n"
1273 printf "struct gdbarch startup_gdbarch =\n"
1274 printf "{\n"
1275 printf "  1, /* Always initialized.  */\n"
1276 printf "  NULL, /* The obstack.  */\n"
1277 printf "  /* basic architecture information */\n"
1278 function_list | while do_read
1279 do
1280     if class_is_info_p
1281     then
1282         printf "  ${staticdefault},  /* ${function} */\n"
1283     fi
1284 done
1285 cat <<EOF
1286   /* target specific vector and its dump routine */
1287   NULL, NULL,
1288   /*per-architecture data-pointers and swap regions */
1289   0, NULL, NULL,
1290   /* Multi-arch values */
1291 EOF
1292 function_list | while do_read
1293 do
1294     if class_is_function_p || class_is_variable_p
1295     then
1296         printf "  ${staticdefault},  /* ${function} */\n"
1297     fi
1298 done
1299 cat <<EOF
1300   /* startup_gdbarch() */
1301 };
1302
1303 struct gdbarch *current_gdbarch = &startup_gdbarch;
1304 EOF
1305
1306 # Create a new gdbarch struct
1307 cat <<EOF
1308
1309 /* Create a new \`\`struct gdbarch'' based on information provided by
1310    \`\`struct gdbarch_info''. */
1311 EOF
1312 printf "\n"
1313 cat <<EOF
1314 struct gdbarch *
1315 gdbarch_alloc (const struct gdbarch_info *info,
1316                struct gdbarch_tdep *tdep)
1317 {
1318   /* NOTE: The new architecture variable is named \`\`current_gdbarch''
1319      so that macros such as TARGET_DOUBLE_BIT, when expanded, refer to
1320      the current local architecture and not the previous global
1321      architecture.  This ensures that the new architectures initial
1322      values are not influenced by the previous architecture.  Once
1323      everything is parameterised with gdbarch, this will go away.  */
1324   struct gdbarch *current_gdbarch;
1325
1326   /* Create an obstack for allocating all the per-architecture memory,
1327      then use that to allocate the architecture vector.  */
1328   struct obstack *obstack = XMALLOC (struct obstack);
1329   obstack_init (obstack);
1330   current_gdbarch = obstack_alloc (obstack, sizeof (*current_gdbarch));
1331   memset (current_gdbarch, 0, sizeof (*current_gdbarch));
1332   current_gdbarch->obstack = obstack;
1333
1334   alloc_gdbarch_data (current_gdbarch);
1335
1336   current_gdbarch->tdep = tdep;
1337 EOF
1338 printf "\n"
1339 function_list | while do_read
1340 do
1341     if class_is_info_p
1342     then
1343         printf "  current_gdbarch->${function} = info->${function};\n"
1344     fi
1345 done
1346 printf "\n"
1347 printf "  /* Force the explicit initialization of these. */\n"
1348 function_list | while do_read
1349 do
1350     if class_is_function_p || class_is_variable_p
1351     then
1352         if [ -n "${predefault}" -a "x${predefault}" != "x0" ]
1353         then
1354           printf "  current_gdbarch->${function} = ${predefault};\n"
1355         fi
1356     fi
1357 done
1358 cat <<EOF
1359   /* gdbarch_alloc() */
1360
1361   return current_gdbarch;
1362 }
1363 EOF
1364
1365 # Free a gdbarch struct.
1366 printf "\n"
1367 printf "\n"
1368 cat <<EOF
1369 /* Allocate extra space using the per-architecture obstack.  */
1370
1371 void *
1372 gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
1373 {
1374   void *data = obstack_alloc (arch->obstack, size);
1375   memset (data, 0, size);
1376   return data;
1377 }
1378
1379
1380 /* Free a gdbarch struct.  This should never happen in normal
1381    operation --- once you've created a gdbarch, you keep it around.
1382    However, if an architecture's init function encounters an error
1383    building the structure, it may need to clean up a partially
1384    constructed gdbarch.  */
1385
1386 void
1387 gdbarch_free (struct gdbarch *arch)
1388 {
1389   struct obstack *obstack;
1390   gdb_assert (arch != NULL);
1391   gdb_assert (!arch->initialized_p);
1392   obstack = arch->obstack;
1393   obstack_free (obstack, 0); /* Includes the ARCH.  */
1394   xfree (obstack);
1395 }
1396 EOF
1397
1398 # verify a new architecture
1399 cat <<EOF
1400
1401
1402 /* Ensure that all values in a GDBARCH are reasonable.  */
1403
1404 /* NOTE/WARNING: The parameter is called \`\`current_gdbarch'' so that it
1405    just happens to match the global variable \`\`current_gdbarch''.  That
1406    way macros refering to that variable get the local and not the global
1407    version - ulgh.  Once everything is parameterised with gdbarch, this
1408    will go away. */
1409
1410 static void
1411 verify_gdbarch (struct gdbarch *current_gdbarch)
1412 {
1413   struct ui_file *log;
1414   struct cleanup *cleanups;
1415   long dummy;
1416   char *buf;
1417   log = mem_fileopen ();
1418   cleanups = make_cleanup_ui_file_delete (log);
1419   /* fundamental */
1420   if (current_gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)
1421     fprintf_unfiltered (log, "\n\tbyte-order");
1422   if (current_gdbarch->bfd_arch_info == NULL)
1423     fprintf_unfiltered (log, "\n\tbfd_arch_info");
1424   /* Check those that need to be defined for the given multi-arch level. */
1425 EOF
1426 function_list | while do_read
1427 do
1428     if class_is_function_p || class_is_variable_p
1429     then
1430         if [ "x${invalid_p}" = "x0" ]
1431         then
1432             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1433         elif class_is_predicate_p
1434         then
1435             printf "  /* Skip verify of ${function}, has predicate */\n"
1436         # FIXME: See do_read for potential simplification
1437         elif [ -n "${invalid_p}" -a -n "${postdefault}" ]
1438         then
1439             printf "  if (${invalid_p})\n"
1440             printf "    current_gdbarch->${function} = ${postdefault};\n"
1441         elif [ -n "${predefault}" -a -n "${postdefault}" ]
1442         then
1443             printf "  if (current_gdbarch->${function} == ${predefault})\n"
1444             printf "    current_gdbarch->${function} = ${postdefault};\n"
1445         elif [ -n "${postdefault}" ]
1446         then
1447             printf "  if (current_gdbarch->${function} == 0)\n"
1448             printf "    current_gdbarch->${function} = ${postdefault};\n"
1449         elif [ -n "${invalid_p}" ]
1450         then
1451             printf "  if (${invalid_p})\n"
1452             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1453         elif [ -n "${predefault}" ]
1454         then
1455             printf "  if (current_gdbarch->${function} == ${predefault})\n"
1456             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1457         fi
1458     fi
1459 done
1460 cat <<EOF
1461   buf = ui_file_xstrdup (log, &dummy);
1462   make_cleanup (xfree, buf);
1463   if (strlen (buf) > 0)
1464     internal_error (__FILE__, __LINE__,
1465                     "verify_gdbarch: the following are invalid ...%s",
1466                     buf);
1467   do_cleanups (cleanups);
1468 }
1469 EOF
1470
1471 # dump the structure
1472 printf "\n"
1473 printf "\n"
1474 cat <<EOF
1475 /* Print out the details of the current architecture. */
1476
1477 /* NOTE/WARNING: The parameter is called \`\`current_gdbarch'' so that it
1478    just happens to match the global variable \`\`current_gdbarch''.  That
1479    way macros refering to that variable get the local and not the global
1480    version - ulgh.  Once everything is parameterised with gdbarch, this
1481    will go away. */
1482
1483 void
1484 gdbarch_dump (struct gdbarch *current_gdbarch, struct ui_file *file)
1485 {
1486   const char *gdb_xm_file = "<not-defined>";
1487   const char *gdb_nm_file = "<not-defined>";
1488   const char *gdb_tm_file = "<not-defined>";
1489 #if defined (GDB_XM_FILE)
1490   gdb_xm_file = GDB_XM_FILE;
1491 #endif
1492   fprintf_unfiltered (file,
1493                       "gdbarch_dump: GDB_XM_FILE = %s\\n",
1494                       gdb_xm_file);
1495 #if defined (GDB_NM_FILE)
1496   gdb_nm_file = GDB_NM_FILE;
1497 #endif
1498   fprintf_unfiltered (file,
1499                       "gdbarch_dump: GDB_NM_FILE = %s\\n",
1500                       gdb_nm_file);
1501 #if defined (GDB_TM_FILE)
1502   gdb_tm_file = GDB_TM_FILE;
1503 #endif
1504   fprintf_unfiltered (file,
1505                       "gdbarch_dump: GDB_TM_FILE = %s\\n",
1506                       gdb_tm_file);
1507 EOF
1508 function_list | sort -t: -k 4 | while do_read
1509 do
1510     # First the predicate
1511     if class_is_predicate_p
1512     then
1513         if test -n "${macro}"
1514         then
1515             printf "#ifdef ${macro}_P\n"
1516             printf "  fprintf_unfiltered (file,\n"
1517             printf "                      \"gdbarch_dump: %%s # %%s\\\\n\",\n"
1518             printf "                      \"${macro}_P()\",\n"
1519             printf "                      XSTRING (${macro}_P ()));\n"
1520             printf "#endif\n"
1521         fi
1522         printf "  fprintf_unfiltered (file,\n"
1523         printf "                      \"gdbarch_dump: gdbarch_${function}_p() = %%d\\\\n\",\n"
1524         printf "                      gdbarch_${function}_p (current_gdbarch));\n"
1525     fi
1526     # Print the macro definition.
1527     if test -n "${macro}"
1528     then
1529         printf "#ifdef ${macro}\n"
1530         if class_is_function_p
1531         then
1532             printf "  fprintf_unfiltered (file,\n"
1533             printf "                      \"gdbarch_dump: %%s # %%s\\\\n\",\n"
1534             printf "                      \"${macro}(${actual})\",\n"
1535             printf "                      XSTRING (${macro} (${actual})));\n"
1536         else
1537             printf "  fprintf_unfiltered (file,\n"
1538             printf "                      \"gdbarch_dump: ${macro} # %%s\\\\n\",\n"
1539             printf "                      XSTRING (${macro}));\n"
1540         fi
1541         printf "#endif\n"
1542     fi
1543     # Print the corresponding value.
1544     if class_is_function_p
1545     then
1546         printf "  fprintf_unfiltered (file,\n"
1547         printf "                      \"gdbarch_dump: ${function} = <0x%%lx>\\\\n\",\n"
1548         printf "                      (long) current_gdbarch->${function});\n"
1549     else
1550         # It is a variable
1551         case "${print}:${returntype}" in
1552             :CORE_ADDR )
1553                 fmt="0x%s"
1554                 print="paddr_nz (current_gdbarch->${function})"
1555                 ;;
1556             :* )
1557                 fmt="%s"
1558                 print="paddr_d (current_gdbarch->${function})"
1559                 ;;
1560             * )
1561                 fmt="%s"
1562                 ;;
1563         esac
1564         printf "  fprintf_unfiltered (file,\n"
1565         printf "                      \"gdbarch_dump: ${function} = %s\\\\n\",\n" "${fmt}"
1566         printf "                      ${print});\n"
1567     fi
1568 done
1569 cat <<EOF
1570   if (current_gdbarch->dump_tdep != NULL)
1571     current_gdbarch->dump_tdep (current_gdbarch, file);
1572 }
1573 EOF
1574
1575
1576 # GET/SET
1577 printf "\n"
1578 cat <<EOF
1579 struct gdbarch_tdep *
1580 gdbarch_tdep (struct gdbarch *gdbarch)
1581 {
1582   if (gdbarch_debug >= 2)
1583     fprintf_unfiltered (gdb_stdlog, "gdbarch_tdep called\\n");
1584   return gdbarch->tdep;
1585 }
1586 EOF
1587 printf "\n"
1588 function_list | while do_read
1589 do
1590     if class_is_predicate_p
1591     then
1592         printf "\n"
1593         printf "int\n"
1594         printf "gdbarch_${function}_p (struct gdbarch *gdbarch)\n"
1595         printf "{\n"
1596         printf "  gdb_assert (gdbarch != NULL);\n"
1597         printf "  return ${predicate};\n"
1598         printf "}\n"
1599     fi
1600     if class_is_function_p
1601     then
1602         printf "\n"
1603         printf "${returntype}\n"
1604         if [ "x${formal}" = "xvoid" ]
1605         then
1606           printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1607         else
1608           printf "gdbarch_${function} (struct gdbarch *gdbarch, ${formal})\n"
1609         fi
1610         printf "{\n"
1611         printf "  gdb_assert (gdbarch != NULL);\n"
1612         printf "  gdb_assert (gdbarch->${function} != NULL);\n"
1613         if class_is_predicate_p && test -n "${predefault}"
1614         then
1615             # Allow a call to a function with a predicate.
1616             printf "  /* Do not check predicate: ${predicate}, allow call.  */\n"
1617         fi
1618         printf "  if (gdbarch_debug >= 2)\n"
1619         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1620         if [ "x${actual}" = "x-" -o "x${actual}" = "x" ]
1621         then
1622             if class_is_multiarch_p
1623             then
1624                 params="gdbarch"
1625             else
1626                 params=""
1627             fi
1628         else
1629             if class_is_multiarch_p
1630             then
1631                 params="gdbarch, ${actual}"
1632             else
1633                 params="${actual}"
1634             fi
1635         fi
1636         if [ "x${returntype}" = "xvoid" ]
1637         then
1638           printf "  gdbarch->${function} (${params});\n"
1639         else
1640           printf "  return gdbarch->${function} (${params});\n"
1641         fi
1642         printf "}\n"
1643         printf "\n"
1644         printf "void\n"
1645         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1646         printf "            `echo ${function} | sed -e 's/./ /g'`  gdbarch_${function}_ftype ${function})\n"
1647         printf "{\n"
1648         printf "  gdbarch->${function} = ${function};\n"
1649         printf "}\n"
1650     elif class_is_variable_p
1651     then
1652         printf "\n"
1653         printf "${returntype}\n"
1654         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1655         printf "{\n"
1656         printf "  gdb_assert (gdbarch != NULL);\n"
1657         if [ "x${invalid_p}" = "x0" ]
1658         then
1659             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1660         elif [ -n "${invalid_p}" ]
1661         then
1662             printf "  /* Check variable is valid.  */\n"
1663             printf "  gdb_assert (!(${invalid_p}));\n"
1664         elif [ -n "${predefault}" ]
1665         then
1666             printf "  /* Check variable changed from pre-default.  */\n"
1667             printf "  gdb_assert (gdbarch->${function} != ${predefault});\n"
1668         fi
1669         printf "  if (gdbarch_debug >= 2)\n"
1670         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1671         printf "  return gdbarch->${function};\n"
1672         printf "}\n"
1673         printf "\n"
1674         printf "void\n"
1675         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1676         printf "            `echo ${function} | sed -e 's/./ /g'`  ${returntype} ${function})\n"
1677         printf "{\n"
1678         printf "  gdbarch->${function} = ${function};\n"
1679         printf "}\n"
1680     elif class_is_info_p
1681     then
1682         printf "\n"
1683         printf "${returntype}\n"
1684         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1685         printf "{\n"
1686         printf "  gdb_assert (gdbarch != NULL);\n"
1687         printf "  if (gdbarch_debug >= 2)\n"
1688         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1689         printf "  return gdbarch->${function};\n"
1690         printf "}\n"
1691     fi
1692 done
1693
1694 # All the trailing guff
1695 cat <<EOF
1696
1697
1698 /* Keep a registry of per-architecture data-pointers required by GDB
1699    modules. */
1700
1701 struct gdbarch_data
1702 {
1703   unsigned index;
1704   int init_p;
1705   gdbarch_data_pre_init_ftype *pre_init;
1706   gdbarch_data_post_init_ftype *post_init;
1707 };
1708
1709 struct gdbarch_data_registration
1710 {
1711   struct gdbarch_data *data;
1712   struct gdbarch_data_registration *next;
1713 };
1714
1715 struct gdbarch_data_registry
1716 {
1717   unsigned nr;
1718   struct gdbarch_data_registration *registrations;
1719 };
1720
1721 struct gdbarch_data_registry gdbarch_data_registry =
1722 {
1723   0, NULL,
1724 };
1725
1726 static struct gdbarch_data *
1727 gdbarch_data_register (gdbarch_data_pre_init_ftype *pre_init,
1728                        gdbarch_data_post_init_ftype *post_init)
1729 {
1730   struct gdbarch_data_registration **curr;
1731   /* Append the new registraration.  */
1732   for (curr = &gdbarch_data_registry.registrations;
1733        (*curr) != NULL;
1734        curr = &(*curr)->next);
1735   (*curr) = XMALLOC (struct gdbarch_data_registration);
1736   (*curr)->next = NULL;
1737   (*curr)->data = XMALLOC (struct gdbarch_data);
1738   (*curr)->data->index = gdbarch_data_registry.nr++;
1739   (*curr)->data->pre_init = pre_init;
1740   (*curr)->data->post_init = post_init;
1741   (*curr)->data->init_p = 1;
1742   return (*curr)->data;
1743 }
1744
1745 struct gdbarch_data *
1746 gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *pre_init)
1747 {
1748   return gdbarch_data_register (pre_init, NULL);
1749 }
1750
1751 struct gdbarch_data *
1752 gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *post_init)
1753 {
1754   return gdbarch_data_register (NULL, post_init);
1755 }
1756
1757 /* Create/delete the gdbarch data vector. */
1758
1759 static void
1760 alloc_gdbarch_data (struct gdbarch *gdbarch)
1761 {
1762   gdb_assert (gdbarch->data == NULL);
1763   gdbarch->nr_data = gdbarch_data_registry.nr;
1764   gdbarch->data = GDBARCH_OBSTACK_CALLOC (gdbarch, gdbarch->nr_data, void *);
1765 }
1766
1767 /* Initialize the current value of the specified per-architecture
1768    data-pointer. */
1769
1770 void
1771 deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1772                              struct gdbarch_data *data,
1773                              void *pointer)
1774 {
1775   gdb_assert (data->index < gdbarch->nr_data);
1776   gdb_assert (gdbarch->data[data->index] == NULL);
1777   gdb_assert (data->pre_init == NULL);
1778   gdbarch->data[data->index] = pointer;
1779 }
1780
1781 /* Return the current value of the specified per-architecture
1782    data-pointer. */
1783
1784 void *
1785 gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *data)
1786 {
1787   gdb_assert (data->index < gdbarch->nr_data);
1788   if (gdbarch->data[data->index] == NULL)
1789     {
1790       /* The data-pointer isn't initialized, call init() to get a
1791          value.  */
1792       if (data->pre_init != NULL)
1793         /* Mid architecture creation: pass just the obstack, and not
1794            the entire architecture, as that way it isn't possible for
1795            pre-init code to refer to undefined architecture
1796            fields.  */
1797         gdbarch->data[data->index] = data->pre_init (gdbarch->obstack);
1798       else if (gdbarch->initialized_p
1799                && data->post_init != NULL)
1800         /* Post architecture creation: pass the entire architecture
1801            (as all fields are valid), but be careful to also detect
1802            recursive references.  */
1803         {
1804           gdb_assert (data->init_p);
1805           data->init_p = 0;
1806           gdbarch->data[data->index] = data->post_init (gdbarch);
1807           data->init_p = 1;
1808         }
1809       else
1810         /* The architecture initialization hasn't completed - punt -
1811          hope that the caller knows what they are doing.  Once
1812          deprecated_set_gdbarch_data has been initialized, this can be
1813          changed to an internal error.  */
1814         return NULL;
1815       gdb_assert (gdbarch->data[data->index] != NULL);
1816     }
1817   return gdbarch->data[data->index];
1818 }
1819
1820
1821
1822 /* Keep a registry of swapped data required by GDB modules. */
1823
1824 struct gdbarch_swap
1825 {
1826   void *swap;
1827   struct gdbarch_swap_registration *source;
1828   struct gdbarch_swap *next;
1829 };
1830
1831 struct gdbarch_swap_registration
1832 {
1833   void *data;
1834   unsigned long sizeof_data;
1835   gdbarch_swap_ftype *init;
1836   struct gdbarch_swap_registration *next;
1837 };
1838
1839 struct gdbarch_swap_registry
1840 {
1841   int nr;
1842   struct gdbarch_swap_registration *registrations;
1843 };
1844
1845 struct gdbarch_swap_registry gdbarch_swap_registry =
1846 {
1847   0, NULL,
1848 };
1849
1850 void
1851 deprecated_register_gdbarch_swap (void *data,
1852                                   unsigned long sizeof_data,
1853                                   gdbarch_swap_ftype *init)
1854 {
1855   struct gdbarch_swap_registration **rego;
1856   for (rego = &gdbarch_swap_registry.registrations;
1857        (*rego) != NULL;
1858        rego = &(*rego)->next);
1859   (*rego) = XMALLOC (struct gdbarch_swap_registration);
1860   (*rego)->next = NULL;
1861   (*rego)->init = init;
1862   (*rego)->data = data;
1863   (*rego)->sizeof_data = sizeof_data;
1864 }
1865
1866 static void
1867 current_gdbarch_swap_init_hack (void)
1868 {
1869   struct gdbarch_swap_registration *rego;
1870   struct gdbarch_swap **curr = &current_gdbarch->swap;
1871   for (rego = gdbarch_swap_registry.registrations;
1872        rego != NULL;
1873        rego = rego->next)
1874     {
1875       if (rego->data != NULL)
1876         {
1877           (*curr) = GDBARCH_OBSTACK_ZALLOC (current_gdbarch,
1878                                             struct gdbarch_swap);
1879           (*curr)->source = rego;
1880           (*curr)->swap = gdbarch_obstack_zalloc (current_gdbarch,
1881                                                   rego->sizeof_data);
1882           (*curr)->next = NULL;
1883           curr = &(*curr)->next;
1884         }
1885       if (rego->init != NULL)
1886         rego->init ();
1887     }
1888 }
1889
1890 static struct gdbarch *
1891 current_gdbarch_swap_out_hack (void)
1892 {
1893   struct gdbarch *old_gdbarch = current_gdbarch;
1894   struct gdbarch_swap *curr;
1895
1896   gdb_assert (old_gdbarch != NULL);
1897   for (curr = old_gdbarch->swap;
1898        curr != NULL;
1899        curr = curr->next)
1900     {
1901       memcpy (curr->swap, curr->source->data, curr->source->sizeof_data);
1902       memset (curr->source->data, 0, curr->source->sizeof_data);
1903     }
1904   current_gdbarch = NULL;
1905   return old_gdbarch;
1906 }
1907
1908 static void
1909 current_gdbarch_swap_in_hack (struct gdbarch *new_gdbarch)
1910 {
1911   struct gdbarch_swap *curr;
1912
1913   gdb_assert (current_gdbarch == NULL);
1914   for (curr = new_gdbarch->swap;
1915        curr != NULL;
1916        curr = curr->next)
1917     memcpy (curr->source->data, curr->swap, curr->source->sizeof_data);
1918   current_gdbarch = new_gdbarch;
1919 }
1920
1921
1922 /* Keep a registry of the architectures known by GDB. */
1923
1924 struct gdbarch_registration
1925 {
1926   enum bfd_architecture bfd_architecture;
1927   gdbarch_init_ftype *init;
1928   gdbarch_dump_tdep_ftype *dump_tdep;
1929   struct gdbarch_list *arches;
1930   struct gdbarch_registration *next;
1931 };
1932
1933 static struct gdbarch_registration *gdbarch_registry = NULL;
1934
1935 static void
1936 append_name (const char ***buf, int *nr, const char *name)
1937 {
1938   *buf = xrealloc (*buf, sizeof (char**) * (*nr + 1));
1939   (*buf)[*nr] = name;
1940   *nr += 1;
1941 }
1942
1943 const char **
1944 gdbarch_printable_names (void)
1945 {
1946   /* Accumulate a list of names based on the registed list of
1947      architectures. */
1948   enum bfd_architecture a;
1949   int nr_arches = 0;
1950   const char **arches = NULL;
1951   struct gdbarch_registration *rego;
1952   for (rego = gdbarch_registry;
1953        rego != NULL;
1954        rego = rego->next)
1955     {
1956       const struct bfd_arch_info *ap;
1957       ap = bfd_lookup_arch (rego->bfd_architecture, 0);
1958       if (ap == NULL)
1959         internal_error (__FILE__, __LINE__,
1960                         "gdbarch_architecture_names: multi-arch unknown");
1961       do
1962         {
1963           append_name (&arches, &nr_arches, ap->printable_name);
1964           ap = ap->next;
1965         }
1966       while (ap != NULL);
1967     }
1968   append_name (&arches, &nr_arches, NULL);
1969   return arches;
1970 }
1971
1972
1973 void
1974 gdbarch_register (enum bfd_architecture bfd_architecture,
1975                   gdbarch_init_ftype *init,
1976                   gdbarch_dump_tdep_ftype *dump_tdep)
1977 {
1978   struct gdbarch_registration **curr;
1979   const struct bfd_arch_info *bfd_arch_info;
1980   /* Check that BFD recognizes this architecture */
1981   bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0);
1982   if (bfd_arch_info == NULL)
1983     {
1984       internal_error (__FILE__, __LINE__,
1985                       "gdbarch: Attempt to register unknown architecture (%d)",
1986                       bfd_architecture);
1987     }
1988   /* Check that we haven't seen this architecture before */
1989   for (curr = &gdbarch_registry;
1990        (*curr) != NULL;
1991        curr = &(*curr)->next)
1992     {
1993       if (bfd_architecture == (*curr)->bfd_architecture)
1994         internal_error (__FILE__, __LINE__,
1995                         "gdbarch: Duplicate registraration of architecture (%s)",
1996                         bfd_arch_info->printable_name);
1997     }
1998   /* log it */
1999   if (gdbarch_debug)
2000     fprintf_unfiltered (gdb_stdlog, "register_gdbarch_init (%s, 0x%08lx)\n",
2001                         bfd_arch_info->printable_name,
2002                         (long) init);
2003   /* Append it */
2004   (*curr) = XMALLOC (struct gdbarch_registration);
2005   (*curr)->bfd_architecture = bfd_architecture;
2006   (*curr)->init = init;
2007   (*curr)->dump_tdep = dump_tdep;
2008   (*curr)->arches = NULL;
2009   (*curr)->next = NULL;
2010 }
2011
2012 void
2013 register_gdbarch_init (enum bfd_architecture bfd_architecture,
2014                        gdbarch_init_ftype *init)
2015 {
2016   gdbarch_register (bfd_architecture, init, NULL);
2017 }
2018
2019
2020 /* Look for an architecture using gdbarch_info.  Base search on only
2021    BFD_ARCH_INFO and BYTE_ORDER. */
2022
2023 struct gdbarch_list *
2024 gdbarch_list_lookup_by_info (struct gdbarch_list *arches,
2025                              const struct gdbarch_info *info)
2026 {
2027   for (; arches != NULL; arches = arches->next)
2028     {
2029       if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info)
2030         continue;
2031       if (info->byte_order != arches->gdbarch->byte_order)
2032         continue;
2033       if (info->osabi != arches->gdbarch->osabi)
2034         continue;
2035       return arches;
2036     }
2037   return NULL;
2038 }
2039
2040
2041 /* Find an architecture that matches the specified INFO.  Create a new
2042    architecture if needed.  Return that new architecture.  Assumes
2043    that there is no current architecture.  */
2044
2045 static struct gdbarch *
2046 find_arch_by_info (struct gdbarch *old_gdbarch, struct gdbarch_info info)
2047 {
2048   struct gdbarch *new_gdbarch;
2049   struct gdbarch_registration *rego;
2050
2051   /* The existing architecture has been swapped out - all this code
2052      works from a clean slate.  */
2053   gdb_assert (current_gdbarch == NULL);
2054
2055   /* Fill in missing parts of the INFO struct using a number of
2056      sources: "set ..."; INFOabfd supplied; and the existing
2057      architecture.  */
2058   gdbarch_info_fill (old_gdbarch, &info);
2059
2060   /* Must have found some sort of architecture. */
2061   gdb_assert (info.bfd_arch_info != NULL);
2062
2063   if (gdbarch_debug)
2064     {
2065       fprintf_unfiltered (gdb_stdlog,
2066                           "find_arch_by_info: info.bfd_arch_info %s\n",
2067                           (info.bfd_arch_info != NULL
2068                            ? info.bfd_arch_info->printable_name
2069                            : "(null)"));
2070       fprintf_unfiltered (gdb_stdlog,
2071                           "find_arch_by_info: info.byte_order %d (%s)\n",
2072                           info.byte_order,
2073                           (info.byte_order == BFD_ENDIAN_BIG ? "big"
2074                            : info.byte_order == BFD_ENDIAN_LITTLE ? "little"
2075                            : "default"));
2076       fprintf_unfiltered (gdb_stdlog,
2077                           "find_arch_by_info: info.osabi %d (%s)\n",
2078                           info.osabi, gdbarch_osabi_name (info.osabi));
2079       fprintf_unfiltered (gdb_stdlog,
2080                           "find_arch_by_info: info.abfd 0x%lx\n",
2081                           (long) info.abfd);
2082       fprintf_unfiltered (gdb_stdlog,
2083                           "find_arch_by_info: info.tdep_info 0x%lx\n",
2084                           (long) info.tdep_info);
2085     }
2086
2087   /* Find the tdep code that knows about this architecture.  */
2088   for (rego = gdbarch_registry;
2089        rego != NULL;
2090        rego = rego->next)
2091     if (rego->bfd_architecture == info.bfd_arch_info->arch)
2092       break;
2093   if (rego == NULL)
2094     {
2095       if (gdbarch_debug)
2096         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2097                             "No matching architecture\n");
2098       return 0;
2099     }
2100
2101   /* Ask the tdep code for an architecture that matches "info".  */
2102   new_gdbarch = rego->init (info, rego->arches);
2103
2104   /* Did the tdep code like it?  No.  Reject the change and revert to
2105      the old architecture.  */
2106   if (new_gdbarch == NULL)
2107     {
2108       if (gdbarch_debug)
2109         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2110                             "Target rejected architecture\n");
2111       return NULL;
2112     }
2113
2114   /* Is this a pre-existing architecture (as determined by already
2115      being initialized)?  Move it to the front of the architecture
2116      list (keeping the list sorted Most Recently Used).  */
2117   if (new_gdbarch->initialized_p)
2118     {
2119       struct gdbarch_list **list;
2120       struct gdbarch_list *this;
2121       if (gdbarch_debug)
2122         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2123                             "Previous architecture 0x%08lx (%s) selected\n",
2124                             (long) new_gdbarch,
2125                             new_gdbarch->bfd_arch_info->printable_name);
2126       /* Find the existing arch in the list.  */
2127       for (list = &rego->arches;
2128            (*list) != NULL && (*list)->gdbarch != new_gdbarch;
2129            list = &(*list)->next);
2130       /* It had better be in the list of architectures.  */
2131       gdb_assert ((*list) != NULL && (*list)->gdbarch == new_gdbarch);
2132       /* Unlink THIS.  */
2133       this = (*list);
2134       (*list) = this->next;
2135       /* Insert THIS at the front.  */
2136       this->next = rego->arches;
2137       rego->arches = this;
2138       /* Return it.  */
2139       return new_gdbarch;
2140     }
2141
2142   /* It's a new architecture.  */
2143   if (gdbarch_debug)
2144     fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2145                         "New architecture 0x%08lx (%s) selected\n",
2146                         (long) new_gdbarch,
2147                         new_gdbarch->bfd_arch_info->printable_name);
2148
2149   /* Insert the new architecture into the front of the architecture
2150      list (keep the list sorted Most Recently Used).  */
2151   {
2152     struct gdbarch_list *this = XMALLOC (struct gdbarch_list);
2153     this->next = rego->arches;
2154     this->gdbarch = new_gdbarch;
2155     rego->arches = this;
2156   }
2157
2158   /* Check that the newly installed architecture is valid.  Plug in
2159      any post init values.  */
2160   new_gdbarch->dump_tdep = rego->dump_tdep;
2161   verify_gdbarch (new_gdbarch);
2162   new_gdbarch->initialized_p = 1;
2163
2164   /* Initialize any per-architecture swap areas.  This phase requires
2165      a valid global CURRENT_GDBARCH.  Set it momentarially, and then
2166      swap the entire architecture out.  */
2167   current_gdbarch = new_gdbarch;
2168   current_gdbarch_swap_init_hack ();
2169   current_gdbarch_swap_out_hack ();
2170
2171   if (gdbarch_debug)
2172     gdbarch_dump (new_gdbarch, gdb_stdlog);
2173
2174   return new_gdbarch;
2175 }
2176
2177 struct gdbarch *
2178 gdbarch_find_by_info (struct gdbarch_info info)
2179 {
2180   /* Save the previously selected architecture, setting the global to
2181      NULL.  This stops things like gdbarch->init() trying to use the
2182      previous architecture's configuration.  The previous architecture
2183      may not even be of the same architecture family.  The most recent
2184      architecture of the same family is found at the head of the
2185      rego->arches list.  */
2186   struct gdbarch *old_gdbarch = current_gdbarch_swap_out_hack ();
2187
2188   /* Find the specified architecture.  */
2189   struct gdbarch *new_gdbarch = find_arch_by_info (old_gdbarch, info);
2190
2191   /* Restore the existing architecture.  */
2192   gdb_assert (current_gdbarch == NULL);
2193   current_gdbarch_swap_in_hack (old_gdbarch);
2194
2195   return new_gdbarch;
2196 }
2197
2198 /* Make the specified architecture current, swapping the existing one
2199    out.  */
2200
2201 void
2202 deprecated_current_gdbarch_select_hack (struct gdbarch *new_gdbarch)
2203 {
2204   gdb_assert (new_gdbarch != NULL);
2205   gdb_assert (current_gdbarch != NULL);
2206   gdb_assert (new_gdbarch->initialized_p);
2207   current_gdbarch_swap_out_hack ();
2208   current_gdbarch_swap_in_hack (new_gdbarch);
2209   architecture_changed_event ();
2210 }
2211
2212 extern void _initialize_gdbarch (void);
2213
2214 void
2215 _initialize_gdbarch (void)
2216 {
2217   struct cmd_list_element *c;
2218
2219   deprecated_add_show_from_set
2220     (add_set_cmd ("arch",
2221                   class_maintenance,
2222                   var_zinteger,
2223                   (char *)&gdbarch_debug,
2224                   "Set architecture debugging.\\n\\
2225 When non-zero, architecture debugging is enabled.", &setdebuglist),
2226      &showdebuglist);
2227 }
2228 EOF
2229
2230 # close things off
2231 exec 1>&2
2232 #../move-if-change new-gdbarch.c gdbarch.c
2233 compare_new gdbarch.c