gdb/gdbarch.sh

   1 #!/bin/sh -u
   2
   3 # Architecture commands for GDB, the GNU debugger.
   4 #
   5 # Copyright (C) 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., 51 Franklin Street, Fifth Floor,
  23 # Boston, MA 02110-1301, USA.
  24
  25 # Make certain that the script is running in an internationalized
  26 # environment.
  27 LANG=c ; export LANG
  28 LC_ALL=c ; export LC_ALL
  29
  30
  31 compare_new ()
  32 {
  33     file=$1
  34     if test ! -r ${file}
  35     then
  36         echo "${file} missing? cp new-${file} ${file}" 1>&2
  37     elif diff -u ${file} new-${file}
  38     then
  39         echo "${file} unchanged" 1>&2
  40     else
  41         echo "${file} has changed? cp new-${file} ${file}" 1>&2
  42     fi
  43 }
  44
  45
  46 # Format of the input table
  47 read="class macro returntype function formal actual staticdefault predefault postdefault invalid_p print garbage_at_eol"
  48
  49 do_read ()
  50 {
  51     comment=""
  52     class=""
  53     while read line
  54     do
  55         if test "${line}" = ""
  56         then
  57             continue
  58         elif test "${line}" = "#" -a "${comment}" = ""
  59         then
  60             continue
  61         elif expr "${line}" : "#" > /dev/null
  62         then
  63             comment="${comment}
  64 ${line}"
  65         else
  66
  67             # The semantics of IFS varies between different SH's.  Some
  68             # treat ``::' as three fields while some treat it as just too.
  69             # Work around this by eliminating ``::'' ....
  70             line="`echo "${line}" | sed -e 's/::/: :/g' -e 's/::/: :/g'`"
  71
  72             OFS="${IFS}" ; IFS="[:]"
  73             eval read ${read} <<EOF
  74 ${line}
  75 EOF
  76             IFS="${OFS}"
  77
  78             if test -n "${garbage_at_eol}"
  79             then
  80                 echo "Garbage at end-of-line in ${line}" 1>&2
  81                 kill $$
  82                 exit 1
  83             fi
  84
  85             # .... and then going back through each field and strip out those
  86             # that ended up with just that space character.
  87             for r in ${read}
  88             do
  89                 if eval test \"\${${r}}\" = \"\ \"
  90                 then
  91                     eval ${r}=""
  92                 fi
  93             done
  94
  95             FUNCTION=`echo ${function} | tr '[a-z]' '[A-Z]'`
  96             if test "x${macro}" = "x="
  97             then
  98                 # Provide a UCASE version of function (for when there isn't MACRO)
  99                 macro="${FUNCTION}"
 100             elif test "${macro}" = "${FUNCTION}"
 101             then
 102                 echo "${function}: Specify = for macro field" 1>&2
 103                 kill $$
 104                 exit 1
 105             fi
 106
 107             # Check that macro definition wasn't supplied for multi-arch
 108             case "${class}" in
 109                 [mM] )
 110                     if test "${macro}" != ""
 111                     then
 112                         echo "Error: Function ${function} multi-arch yet macro ${macro} supplied" 1>&2
 113                         kill $$
 114                         exit 1
 115                     fi
 116             esac
 117
 118             case "${class}" in
 119                 m ) staticdefault="${predefault}" ;;
 120                 M ) staticdefault="0" ;;
 121                 * ) test "${staticdefault}" || staticdefault=0 ;;
 122             esac
 123
 124             case "${class}" in
 125             F | V | M )
 126                 case "${invalid_p}" in
 127                 "" )
 128                     if test -n "${predefault}"
 129                     then
 130                         #invalid_p="gdbarch->${function} == ${predefault}"
 131                         predicate="gdbarch->${function} != ${predefault}"
 132                     elif class_is_variable_p
 133                     then
 134                         predicate="gdbarch->${function} != 0"
 135                     elif class_is_function_p
 136                     then
 137                         predicate="gdbarch->${function} != NULL"
 138                     fi
 139                     ;;
 140                 * )
 141                     echo "Predicate function ${function} with invalid_p." 1>&2
 142                     kill $$
 143                     exit 1
 144                     ;;
 145                 esac
 146             esac
 147
 148             # PREDEFAULT is a valid fallback definition of MEMBER when
 149             # multi-arch is not enabled.  This ensures that the
 150             # default value, when multi-arch is the same as the
 151             # default value when not multi-arch.  POSTDEFAULT is
 152             # always a valid definition of MEMBER as this again
 153             # ensures consistency.
 154
 155             if [ -n "${postdefault}" ]
 156             then
 157                 fallbackdefault="${postdefault}"
 158             elif [ -n "${predefault}" ]
 159             then
 160                 fallbackdefault="${predefault}"
 161             else
 162                 fallbackdefault="0"
 163             fi
 164
 165             #NOT YET: See gdbarch.log for basic verification of
 166             # database
 167
 168             break
 169         fi
 170     done
 171     if [ -n "${class}" ]
 172     then
 173         true
 174     else
 175         false
 176     fi
 177 }
 178
 179
 180 fallback_default_p ()
 181 {
 182     [ -n "${postdefault}" -a "x${invalid_p}" != "x0" ] \
 183         || [ -n "${predefault}" -a "x${invalid_p}" = "x0" ]
 184 }
 185
 186 class_is_variable_p ()
 187 {
 188     case "${class}" in
 189         *v* | *V* ) true ;;
 190         * ) false ;;
 191     esac
 192 }
 193
 194 class_is_function_p ()
 195 {
 196     case "${class}" in
 197         *f* | *F* | *m* | *M* ) true ;;
 198         * ) false ;;
 199     esac
 200 }
 201
 202 class_is_multiarch_p ()
 203 {
 204     case "${class}" in
 205         *m* | *M* ) true ;;
 206         * ) false ;;
 207     esac
 208 }
 209
 210 class_is_predicate_p ()
 211 {
 212     case "${class}" in
 213         *F* | *V* | *M* ) true ;;
 214         * ) false ;;
 215     esac
 216 }
 217
 218 class_is_info_p ()
 219 {
 220     case "${class}" in
 221         *i* ) true ;;
 222         * ) false ;;
 223     esac
 224 }
 225
 226
 227 # dump out/verify the doco
 228 for field in ${read}
 229 do
 230   case ${field} in
 231
 232     class ) : ;;
 233
 234         # # -> line disable
 235         # f -> function
 236         #   hiding a function
 237         # F -> function + predicate
 238         #   hiding a function + predicate to test function validity
 239         # v -> variable
 240         #   hiding a variable
 241         # V -> variable + predicate
 242         #   hiding a variable + predicate to test variables validity
 243         # i -> set from info
 244         #   hiding something from the ``struct info'' object
 245         # m -> multi-arch function
 246         #   hiding a multi-arch function (parameterised with the architecture)
 247         # M -> multi-arch function + predicate
 248         #   hiding a multi-arch function + predicate to test function validity
 249
 250     macro ) : ;;
 251
 252         # The name of the legacy C macro by which this method can be
 253         # accessed.  If empty, no macro is defined.  If "=", a macro
 254         # formed from the upper-case function name is used.
 255
 256     returntype ) : ;;
 257
 258         # For functions, the return type; for variables, the data type
 259
 260     function ) : ;;
 261
 262         # For functions, the member function name; for variables, the
 263         # variable name.  Member function names are always prefixed with
 264         # ``gdbarch_'' for name-space purity.
 265
 266     formal ) : ;;
 267
 268         # The formal argument list.  It is assumed that the formal
 269         # argument list includes the actual name of each list element.
 270         # A function with no arguments shall have ``void'' as the
 271         # formal argument list.
 272
 273     actual ) : ;;
 274
 275         # The list of actual arguments.  The arguments specified shall
 276         # match the FORMAL list given above.  Functions with out
 277         # arguments leave this blank.
 278
 279     staticdefault ) : ;;
 280
 281         # To help with the GDB startup a static gdbarch object is
 282         # created.  STATICDEFAULT is the value to insert into that
 283         # static gdbarch object.  Since this a static object only
 284         # simple expressions can be used.
 285
 286         # If STATICDEFAULT is empty, zero is used.
 287
 288     predefault ) : ;;
 289
 290         # An initial value to assign to MEMBER of the freshly
 291         # malloc()ed gdbarch object.  After initialization, the
 292         # freshly malloc()ed object is passed to the target
 293         # architecture code for further updates.
 294
 295         # If PREDEFAULT is empty, zero is used.
 296
 297         # A non-empty PREDEFAULT, an empty POSTDEFAULT and a zero
 298         # INVALID_P are specified, PREDEFAULT will be used as the
 299         # default for the non- multi-arch target.
 300
 301         # A zero PREDEFAULT function will force the fallback to call
 302         # internal_error().
 303
 304         # Variable declarations can refer to ``gdbarch'' which will
 305         # contain the current architecture.  Care should be taken.
 306
 307     postdefault ) : ;;
 308
 309         # A value to assign to MEMBER of the new gdbarch object should
 310         # the target architecture code fail to change the PREDEFAULT
 311         # value.
 312
 313         # If POSTDEFAULT is empty, no post update is performed.
 314
 315         # If both INVALID_P and POSTDEFAULT are non-empty then
 316         # INVALID_P will be used to determine if MEMBER should be
 317         # changed to POSTDEFAULT.
 318
 319         # If a non-empty POSTDEFAULT and a zero INVALID_P are
 320         # specified, POSTDEFAULT will be used as the default for the
 321         # non- multi-arch target (regardless of the value of
 322         # PREDEFAULT).
 323
 324         # You cannot specify both a zero INVALID_P and a POSTDEFAULT.
 325
 326         # Variable declarations can refer to ``current_gdbarch'' which
 327         # will contain the current architecture.  Care should be
 328         # taken.
 329
 330     invalid_p ) : ;;
 331
 332         # A predicate equation that validates MEMBER.  Non-zero is
 333         # returned if the code creating the new architecture failed to
 334         # initialize MEMBER or the initialized the member is invalid.
 335         # If POSTDEFAULT is non-empty then MEMBER will be updated to
 336         # that value.  If POSTDEFAULT is empty then internal_error()
 337         # is called.
 338
 339         # If INVALID_P is empty, a check that MEMBER is no longer
 340         # equal to PREDEFAULT is used.
 341
 342         # The expression ``0'' disables the INVALID_P check making
 343         # PREDEFAULT a legitimate value.
 344
 345         # See also PREDEFAULT and POSTDEFAULT.
 346
 347     print ) : ;;
 348
 349         # An optional expression that convers MEMBER to a value
 350         # suitable for formatting using %s.
 351
 352         # If PRINT is empty, paddr_nz (for CORE_ADDR) or paddr_d
 353         # (anything else) is used.
 354
 355     garbage_at_eol ) : ;;
 356
 357         # Catches stray fields.
 358
 359     *)
 360         echo "Bad field ${field}"
 361         exit 1;;
 362   esac
 363 done
 364
 365
 366 function_list ()
 367 {
 368   # See below (DOCO) for description of each field
 369   cat <<EOF
 370 i:TARGET_ARCHITECTURE:const struct bfd_arch_info *:bfd_arch_info:::&bfd_default_arch_struct::::TARGET_ARCHITECTURE->printable_name
 371 #
 372 i:TARGET_BYTE_ORDER:int:byte_order:::BFD_ENDIAN_BIG
 373 #
 374 i:TARGET_OSABI:enum gdb_osabi:osabi:::GDB_OSABI_UNKNOWN
 375 # Number of bits in a char or unsigned char for the target machine.
 376 # Just like CHAR_BIT in <limits.h> but describes the target machine.
 377 # v:TARGET_CHAR_BIT:int:char_bit::::8 * sizeof (char):8::0:
 378 #
 379 # Number of bits in a short or unsigned short for the target machine.
 380 v:TARGET_SHORT_BIT:int:short_bit:::8 * sizeof (short):2*TARGET_CHAR_BIT::0
 381 # Number of bits in an int or unsigned int for the target machine.
 382 v:TARGET_INT_BIT:int:int_bit:::8 * sizeof (int):4*TARGET_CHAR_BIT::0
 383 # Number of bits in a long or unsigned long for the target machine.
 384 v:TARGET_LONG_BIT:int:long_bit:::8 * sizeof (long):4*TARGET_CHAR_BIT::0
 385 # Number of bits in a long long or unsigned long long for the target
 386 # machine.
 387 v:TARGET_LONG_LONG_BIT:int:long_long_bit:::8 * sizeof (LONGEST):2*TARGET_LONG_BIT::0
 388
 389 # The ABI default bit-size and format for "float", "double", and "long
 390 # double".  These bit/format pairs should eventually be combined into
 391 # a single object.  For the moment, just initialize them as a pair.
 392
 393 v:TARGET_FLOAT_BIT:int:float_bit:::8 * sizeof (float):4*TARGET_CHAR_BIT::0
 394 v:TARGET_FLOAT_FORMAT:const struct floatformat *:float_format:::::default_float_format (current_gdbarch)::pformat (current_gdbarch->float_format)
 395 v:TARGET_DOUBLE_BIT:int:double_bit:::8 * sizeof (double):8*TARGET_CHAR_BIT::0
 396 v:TARGET_DOUBLE_FORMAT:const struct floatformat *:double_format:::::default_double_format (current_gdbarch)::pformat (current_gdbarch->double_format)
 397 v:TARGET_LONG_DOUBLE_BIT:int:long_double_bit:::8 * sizeof (long double):8*TARGET_CHAR_BIT::0
 398 v:TARGET_LONG_DOUBLE_FORMAT:const struct floatformat *:long_double_format:::::default_double_format (current_gdbarch)::pformat (current_gdbarch->long_double_format)
 399
 400 # For most targets, a pointer on the target and its representation as an
 401 # address in GDB have the same size and "look the same".  For such a
 402 # target, you need only set TARGET_PTR_BIT / ptr_bit and TARGET_ADDR_BIT
 403 # / addr_bit will be set from it.
 404 #
 405 # If TARGET_PTR_BIT and TARGET_ADDR_BIT are different, you'll probably
 406 # also need to set POINTER_TO_ADDRESS and ADDRESS_TO_POINTER as well.
 407 #
 408 # ptr_bit is the size of a pointer on the target
 409 v:TARGET_PTR_BIT:int:ptr_bit:::8 * sizeof (void*):TARGET_INT_BIT::0
 410 # addr_bit is the size of a target address as represented in gdb
 411 v:TARGET_ADDR_BIT:int:addr_bit:::8 * sizeof (void*):0:TARGET_PTR_BIT:
 412 # Number of bits in a BFD_VMA for the target object file format.
 413 v:TARGET_BFD_VMA_BIT:int:bfd_vma_bit:::8 * sizeof (void*):TARGET_ARCHITECTURE->bits_per_address::0
 414 #
 415 # One if \`char' acts like \`signed char', zero if \`unsigned char'.
 416 v:TARGET_CHAR_SIGNED:int:char_signed:::1:-1:1
 417 #
 418 F:TARGET_READ_PC:CORE_ADDR:read_pc:ptid_t ptid:ptid
 419 f:TARGET_WRITE_PC:void:write_pc:CORE_ADDR val, ptid_t ptid:val, ptid:0:generic_target_write_pc::0
 420 # UNWIND_SP is a direct replacement for TARGET_READ_SP.
 421 F:TARGET_READ_SP:CORE_ADDR:read_sp:void
 422 # Function for getting target's idea of a frame pointer.  FIXME: GDB's
 423 # whole scheme for dealing with "frames" and "frame pointers" needs a
 424 # serious shakedown.
 425 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
 426 #
 427 M::void:pseudo_register_read:struct regcache *regcache, int cookednum, gdb_byte *buf:regcache, cookednum, buf
 428 M::void:pseudo_register_write:struct regcache *regcache, int cookednum, const gdb_byte *buf:regcache, cookednum, buf
 429 #
 430 v:=:int:num_regs:::0:-1
 431 # This macro gives the number of pseudo-registers that live in the
 432 # register namespace but do not get fetched or stored on the target.
 433 # These pseudo-registers may be aliases for other registers,
 434 # combinations of other registers, or they may be computed by GDB.
 435 v:=:int:num_pseudo_regs:::0:0::0
 436
 437 # GDB's standard (or well known) register numbers.  These can map onto
 438 # a real register or a pseudo (computed) register or not be defined at
 439 # all (-1).
 440 # SP_REGNUM will hopefully be replaced by UNWIND_SP.
 441 v:=:int:sp_regnum:::-1:-1::0
 442 v:=:int:pc_regnum:::-1:-1::0
 443 v:=:int:ps_regnum:::-1:-1::0
 444 v:=:int:fp0_regnum:::0:-1::0
 445 # Convert stab register number (from \`r\' declaration) to a gdb REGNUM.
 446 f:=:int:stab_reg_to_regnum:int stab_regnr:stab_regnr::no_op_reg_to_regnum::0
 447 # Provide a default mapping from a ecoff register number to a gdb REGNUM.
 448 f:=:int:ecoff_reg_to_regnum:int ecoff_regnr:ecoff_regnr::no_op_reg_to_regnum::0
 449 # Provide a default mapping from a DWARF register number to a gdb REGNUM.
 450 f:=:int:dwarf_reg_to_regnum:int dwarf_regnr:dwarf_regnr::no_op_reg_to_regnum::0
 451 # Convert from an sdb register number to an internal gdb register number.
 452 f:=:int:sdb_reg_to_regnum:int sdb_regnr:sdb_regnr::no_op_reg_to_regnum::0
 453 f:=:int:dwarf2_reg_to_regnum:int dwarf2_regnr:dwarf2_regnr::no_op_reg_to_regnum::0
 454 f:=:const char *:register_name:int regnr:regnr
 455
 456 # REGISTER_TYPE is a direct replacement for DEPRECATED_REGISTER_VIRTUAL_TYPE.
 457 M::struct type *:register_type:int reg_nr:reg_nr
 458 # If the value returned by DEPRECATED_REGISTER_BYTE agrees with the
 459 # register offsets computed using just REGISTER_TYPE, this can be
 460 # deleted.  See: maint print registers.  NOTE: cagney/2002-05-02: This
 461 # function with predicate has a valid (callable) initial value.  As a
 462 # consequence, even when the predicate is false, the corresponding
 463 # function works.  This simplifies the migration process - old code,
 464 # calling DEPRECATED_REGISTER_BYTE, doesn't need to be modified.
 465 F:=:int:deprecated_register_byte:int reg_nr:reg_nr:generic_register_byte:generic_register_byte
 466
 467 # See gdbint.texinfo, and PUSH_DUMMY_CALL.
 468 M::struct frame_id:unwind_dummy_id:struct frame_info *info:info
 469 # Implement UNWIND_DUMMY_ID and PUSH_DUMMY_CALL, then delete
 470 # DEPRECATED_FP_REGNUM.
 471 v:=:int:deprecated_fp_regnum:::-1:-1::0
 472
 473 # See gdbint.texinfo.  See infcall.c.
 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 # DEPRECATED_REGISTER_SIZE can be deleted.
 476 v:=:int:deprecated_register_size
 477 v:=:int:call_dummy_location::::AT_ENTRY_POINT::0
 478 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
 479
 480 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
 481 M::void:print_float_info:struct ui_file *file, struct frame_info *frame, const char *args:file, frame, args
 482 M::void:print_vector_info:struct ui_file *file, struct frame_info *frame, const char *args:file, frame, args
 483 # MAP a GDB RAW register number onto a simulator register number.  See
 484 # also include/...-sim.h.
 485 f:=:int:register_sim_regno:int reg_nr:reg_nr::legacy_register_sim_regno::0
 486 F:=:int:register_bytes_ok:long nr_bytes:nr_bytes
 487 f:=:int:cannot_fetch_register:int regnum:regnum::cannot_register_not::0
 488 f:=:int:cannot_store_register:int regnum:regnum::cannot_register_not::0
 489 # setjmp/longjmp support.
 490 F:=:int:get_longjmp_target:CORE_ADDR *pc:pc
 491 #
 492 v:=:int:believe_pcc_promotion:::::::
 493 #
 494 f:=:int:convert_register_p:int regnum, struct type *type:regnum, type:0:generic_convert_register_p::0
 495 f:=:void:register_to_value:struct frame_info *frame, int regnum, struct type *type, gdb_byte *buf:frame, regnum, type, buf:0
 496 f:=:void:value_to_register:struct frame_info *frame, int regnum, struct type *type, const gdb_byte *buf:frame, regnum, type, buf:0
 497 #
 498 f:=:CORE_ADDR:pointer_to_address:struct type *type, const gdb_byte *buf:type, buf::unsigned_pointer_to_address::0
 499 f:=:void:address_to_pointer:struct type *type, gdb_byte *buf, CORE_ADDR addr:type, buf, addr::unsigned_address_to_pointer::0
 500 M::CORE_ADDR:integer_to_address:struct type *type, const gdb_byte *buf:type, buf
 501 #
 502 # NOTE: kettenis/2005-09-01: Replaced by PUSH_DUMMY_CALL.
 503 F:=:void:deprecated_store_struct_return:CORE_ADDR addr, CORE_ADDR sp:addr, sp
 504
 505 # It has been suggested that this, well actually its predecessor,
 506 # should take the type/value of the function to be called and not the
 507 # return type.  This is left as an exercise for the reader.
 508
 509 # NOTE: cagney/2004-06-13: The function stack.c:return_command uses
 510 # the predicate with default hack to avoid calling STORE_RETURN_VALUE
 511 # (via legacy_return_value), when a small struct is involved.
 512
 513 M::enum return_value_convention:return_value:struct type *valtype, struct regcache *regcache, gdb_byte *readbuf, const gdb_byte *writebuf:valtype, regcache, readbuf, writebuf::legacy_return_value
 514
 515 # The deprecated methods EXTRACT_RETURN_VALUE, STORE_RETURN_VALUE,
 516 # DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS and
 517 # DEPRECATED_USE_STRUCT_CONVENTION have all been folded into
 518 # RETURN_VALUE.
 519
 520 f:=:void:extract_return_value:struct type *type, struct regcache *regcache, gdb_byte *valbuf:type, regcache, valbuf::legacy_extract_return_value::0
 521 f:=:void:store_return_value:struct type *type, struct regcache *regcache, const gdb_byte *valbuf:type, regcache, valbuf::legacy_store_return_value::0
 522 f:=:void:deprecated_extract_return_value:struct type *type, gdb_byte *regbuf, gdb_byte *valbuf:type, regbuf, valbuf
 523 f:=:void:deprecated_store_return_value:struct type *type, gdb_byte *valbuf:type, valbuf
 524 f:=:int:deprecated_use_struct_convention:int gcc_p, struct type *value_type:gcc_p, value_type::generic_use_struct_convention::0
 525
 526 # As of 2004-01-17 only the 32-bit SPARC ABI has been identified as an
 527 # ABI suitable for the implementation of a robust extract
 528 # struct-convention return-value address method (the sparc saves the
 529 # address in the callers frame).  All the other cases so far examined,
 530 # the DEPRECATED_EXTRACT_STRUCT_VALUE implementation has been
 531 # erreneous - the code was incorrectly assuming that the return-value
 532 # address, stored in a register, was preserved across the entire
 533 # function call.
 534
 535 # For the moment retain DEPRECATED_EXTRACT_STRUCT_VALUE as a marker of
 536 # the ABIs that are still to be analyzed - perhaps this should simply
 537 # be deleted.  The commented out extract_returned_value_address method
 538 # is provided as a starting point for the 32-bit SPARC.  It, or
 539 # something like it, along with changes to both infcmd.c and stack.c
 540 # will be needed for that case to work.  NB: It is passed the callers
 541 # frame since it is only after the callee has returned that this
 542 # function is used.
 543
 544 #M::CORE_ADDR:extract_returned_value_address:struct frame_info *caller_frame:caller_frame
 545 F:=:CORE_ADDR:deprecated_extract_struct_value_address:struct regcache *regcache:regcache
 546
 547 #
 548 f:=:CORE_ADDR:skip_prologue:CORE_ADDR ip:ip:0:0
 549 f:=:int:inner_than:CORE_ADDR lhs, CORE_ADDR rhs:lhs, rhs:0:0
 550 f:=:const gdb_byte *:breakpoint_from_pc:CORE_ADDR *pcptr, int *lenptr:pcptr, lenptr::0:
 551 M::CORE_ADDR:adjust_breakpoint_address:CORE_ADDR bpaddr:bpaddr
 552 f:=:int:memory_insert_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_insert_breakpoint::0
 553 f:=:int:memory_remove_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_remove_breakpoint::0
 554 v:=:CORE_ADDR:decr_pc_after_break:::0:::0
 555
 556 # A function can be addressed by either it's "pointer" (possibly a
 557 # descriptor address) or "entry point" (first executable instruction).
 558 # The method "convert_from_func_ptr_addr" converting the former to the
 559 # latter.  DEPRECATED_FUNCTION_START_OFFSET is being used to implement
 560 # a simplified subset of that functionality - the function's address
 561 # corresponds to the "function pointer" and the function's start
 562 # corresponds to the "function entry point" - and hence is redundant.
 563
 564 v:=:CORE_ADDR:deprecated_function_start_offset:::0:::0
 565
 566 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
 567
 568 # Fetch the target specific address used to represent a load module.
 569 F:=:CORE_ADDR:fetch_tls_load_module_address:struct objfile *objfile:objfile
 570 #
 571 v:=:CORE_ADDR:frame_args_skip:::0:::0
 572 M::CORE_ADDR:unwind_pc:struct frame_info *next_frame:next_frame
 573 M::CORE_ADDR:unwind_sp:struct frame_info *next_frame:next_frame
 574 # DEPRECATED_FRAME_LOCALS_ADDRESS as been replaced by the per-frame
 575 # frame-base.  Enable frame-base before frame-unwind.
 576 F:=:CORE_ADDR:deprecated_saved_pc_after_call:struct frame_info *frame:frame
 577 F:=:int:frame_num_args:struct frame_info *frame:frame
 578 #
 579 # DEPRECATED_STACK_ALIGN has been replaced by an initial aligning call
 580 # to frame_align and the requirement that methods such as
 581 # push_dummy_call and frame_red_zone_size maintain correct stack/frame
 582 # alignment.
 583 F:=:CORE_ADDR:deprecated_stack_align:CORE_ADDR sp:sp
 584 M::CORE_ADDR:frame_align:CORE_ADDR address:address
 585 # DEPRECATED_REG_STRUCT_HAS_ADDR has been replaced by
 586 # stabs_argument_has_addr.
 587 F:=:int:deprecated_reg_struct_has_addr:int gcc_p, struct type *type:gcc_p, type
 588 m::int:stabs_argument_has_addr:struct type *type:type::default_stabs_argument_has_addr::0
 589 v:=:int:frame_red_zone_size
 590 #
 591 m::CORE_ADDR:convert_from_func_ptr_addr:CORE_ADDR addr, struct target_ops *targ:addr, targ::convert_from_func_ptr_addr_identity::0
 592 # On some machines there are bits in addresses which are not really
 593 # part of the address, but are used by the kernel, the hardware, etc.
 594 # for special purposes.  ADDR_BITS_REMOVE takes out any such bits so
 595 # we get a "real" address such as one would find in a symbol table.
 596 # This is used only for addresses of instructions, and even then I'm
 597 # not sure it's used in all contexts.  It exists to deal with there
 598 # being a few stray bits in the PC which would mislead us, not as some
 599 # sort of generic thing to handle alignment or segmentation (it's
 600 # possible it should be in TARGET_READ_PC instead).
 601 f:=:CORE_ADDR:addr_bits_remove:CORE_ADDR addr:addr::core_addr_identity::0
 602 # It is not at all clear why SMASH_TEXT_ADDRESS is not folded into
 603 # ADDR_BITS_REMOVE.
 604 f:=:CORE_ADDR:smash_text_address:CORE_ADDR addr:addr::core_addr_identity::0
 605 # FIXME/cagney/2001-01-18: This should be split in two.  A target method that indicates if
 606 # the target needs software single step.  An ISA method to implement it.
 607 #
 608 # FIXME/cagney/2001-01-18: This should be replaced with something that inserts breakpoints
 609 # using the breakpoint system instead of blatting memory directly (as with rs6000).
 610 #
 611 # FIXME/cagney/2001-01-18: The logic is backwards.  It should be asking if the target can
 612 # single step.  If not, then implement single step using breakpoints.
 613 F:=:void:software_single_step:enum target_signal sig, int insert_breakpoints_p:sig, insert_breakpoints_p
 614 # Return non-zero if the processor is executing a delay slot and a
 615 # further single-step is needed before the instruction finishes.
 616 M::int:single_step_through_delay:struct frame_info *frame:frame
 617 # FIXME: cagney/2003-08-28: Need to find a better way of selecting the
 618 # disassembler.  Perhaps objdump can handle it?
 619 f:TARGET_PRINT_INSN:int:print_insn:bfd_vma vma, struct disassemble_info *info:vma, info::0:
 620 f:=:CORE_ADDR:skip_trampoline_code:CORE_ADDR pc:pc::generic_skip_trampoline_code::0
 621
 622
 623 # If IN_SOLIB_DYNSYM_RESOLVE_CODE returns true, and SKIP_SOLIB_RESOLVER
 624 # evaluates non-zero, this is the address where the debugger will place
 625 # a step-resume breakpoint to get us past the dynamic linker.
 626 m::CORE_ADDR:skip_solib_resolver:CORE_ADDR pc:pc::generic_skip_solib_resolver::0
 627 # Some systems also have trampoline code for returning from shared libs.
 628 f:=:int:in_solib_return_trampoline:CORE_ADDR pc, char *name:pc, name::generic_in_solib_return_trampoline::0
 629
 630 # A target might have problems with watchpoints as soon as the stack
 631 # frame of the current function has been destroyed.  This mostly happens
 632 # as the first action in a funtion's epilogue.  in_function_epilogue_p()
 633 # is defined to return a non-zero value if either the given addr is one
 634 # instruction after the stack destroying instruction up to the trailing
 635 # return instruction or if we can figure out that the stack frame has
 636 # already been invalidated regardless of the value of addr.  Targets
 637 # which don't suffer from that problem could just let this functionality
 638 # untouched.
 639 m::int:in_function_epilogue_p:CORE_ADDR addr:addr:0:generic_in_function_epilogue_p::0
 640 # Given a vector of command-line arguments, return a newly allocated
 641 # string which, when passed to the create_inferior function, will be
 642 # parsed (on Unix systems, by the shell) to yield the same vector.
 643 # This function should call error() if the argument vector is not
 644 # representable for this target or if this target does not support
 645 # command-line arguments.
 646 # ARGC is the number of elements in the vector.
 647 # ARGV is an array of strings, one per argument.
 648 m::char *:construct_inferior_arguments:int argc, char **argv:argc, argv::construct_inferior_arguments::0
 649 f:=:void:elf_make_msymbol_special:asymbol *sym, struct minimal_symbol *msym:sym, msym::default_elf_make_msymbol_special::0
 650 f:=:void:coff_make_msymbol_special:int val, struct minimal_symbol *msym:val, msym::default_coff_make_msymbol_special::0
 651 v:=:const char *:name_of_malloc:::"malloc":"malloc"::0:NAME_OF_MALLOC
 652 v:=:int:cannot_step_breakpoint:::0:0::0
 653 v:=:int:have_nonsteppable_watchpoint:::0:0::0
 654 F:=:int:address_class_type_flags:int byte_size, int dwarf2_addr_class:byte_size, dwarf2_addr_class
 655 M::const char *:address_class_type_flags_to_name:int type_flags:type_flags
 656 M::int:address_class_name_to_type_flags:const char *name, int *type_flags_ptr:name, type_flags_ptr
 657 # Is a register in a group
 658 m::int:register_reggroup_p:int regnum, struct reggroup *reggroup:regnum, reggroup::default_register_reggroup_p::0
 659 # Fetch the pointer to the ith function argument.
 660 F:=:CORE_ADDR:fetch_pointer_argument:struct frame_info *frame, int argi, struct type *type:frame, argi, type
 661
 662 # Return the appropriate register set for a core file section with
 663 # name SECT_NAME and size SECT_SIZE.
 664 M::const struct regset *:regset_from_core_section:const char *sect_name, size_t sect_size:sect_name, sect_size
 665 EOF
 666 }
 667
 668 #
 669 # The .log file
 670 #
 671 exec > new-gdbarch.log
 672 function_list | while do_read
 673 do
 674     cat <<EOF
 675 ${class} ${returntype} ${function} ($formal)
 676 EOF
 677     for r in ${read}
 678     do
 679         eval echo \"\ \ \ \ ${r}=\${${r}}\"
 680     done
 681     if class_is_predicate_p && fallback_default_p
 682     then
 683         echo "Error: predicate function ${function} can not have a non- multi-arch default" 1>&2
 684         kill $$
 685         exit 1
 686     fi
 687     if [ "x${invalid_p}" = "x0" -a -n "${postdefault}" ]
 688     then
 689         echo "Error: postdefault is useless when invalid_p=0" 1>&2
 690         kill $$
 691         exit 1
 692     fi
 693     if class_is_multiarch_p
 694     then
 695         if class_is_predicate_p ; then :
 696         elif test "x${predefault}" = "x"
 697         then
 698             echo "Error: pure multi-arch function ${function} must have a predefault" 1>&2
 699             kill $$
 700             exit 1
 701         fi
 702     fi
 703     echo ""
 704 done
 705
 706 exec 1>&2
 707 compare_new gdbarch.log
 708
 709
 710 copyright ()
 711 {
 712 cat <<EOF
 713 /* *INDENT-OFF* */ /* THIS FILE IS GENERATED */
 714
 715 /* Dynamic architecture support for GDB, the GNU debugger.
 716
 717    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free
 718    Software Foundation, Inc.
 719
 720    This file is part of GDB.
 721
 722    This program is free software; you can redistribute it and/or modify
 723    it under the terms of the GNU General Public License as published by
 724    the Free Software Foundation; either version 2 of the License, or
 725    (at your option) any later version.
 726
 727    This program is distributed in the hope that it will be useful,
 728    but WITHOUT ANY WARRANTY; without even the implied warranty of
 729    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 730    GNU General Public License for more details.
 731
 732    You should have received a copy of the GNU General Public License
 733    along with this program; if not, write to the Free Software
 734    Foundation, Inc., 51 Franklin Street, Fifth Floor,
 735    Boston, MA 02110-1301, USA.  */
 736
 737 /* This file was created with the aid of \`\`gdbarch.sh''.
 738
 739    The Bourne shell script \`\`gdbarch.sh'' creates the files
 740    \`\`new-gdbarch.c'' and \`\`new-gdbarch.h and then compares them
 741    against the existing \`\`gdbarch.[hc]''.  Any differences found
 742    being reported.
 743
 744    If editing this file, please also run gdbarch.sh and merge any
 745    changes into that script. Conversely, when making sweeping changes
 746    to this file, modifying gdbarch.sh and using its output may prove
 747    easier. */
 748
 749 EOF
 750 }
 751
 752 #
 753 # The .h file
 754 #
 755
 756 exec > new-gdbarch.h
 757 copyright
 758 cat <<EOF
 759 #ifndef GDBARCH_H
 760 #define GDBARCH_H
 761
 762 struct floatformat;
 763 struct ui_file;
 764 struct frame_info;
 765 struct value;
 766 struct objfile;
 767 struct minimal_symbol;
 768 struct regcache;
 769 struct reggroup;
 770 struct regset;
 771 struct disassemble_info;
 772 struct target_ops;
 773 struct obstack;
 774 struct bp_target_info;
 775
 776 extern struct gdbarch *current_gdbarch;
 777 EOF
 778
 779 # function typedef's
 780 printf "\n"
 781 printf "\n"
 782 printf "/* The following are pre-initialized by GDBARCH. */\n"
 783 function_list | while do_read
 784 do
 785     if class_is_info_p
 786     then
 787         printf "\n"
 788         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 789         printf "/* set_gdbarch_${function}() - not applicable - pre-initialized. */\n"
 790         if test -n "${macro}"
 791         then
 792             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 793             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 794             printf "#endif\n"
 795             printf "#if !defined (${macro})\n"
 796             printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 797             printf "#endif\n"
 798         fi
 799     fi
 800 done
 801
 802 # function typedef's
 803 printf "\n"
 804 printf "\n"
 805 printf "/* The following are initialized by the target dependent code. */\n"
 806 function_list | while do_read
 807 do
 808     if [ -n "${comment}" ]
 809     then
 810         echo "${comment}" | sed \
 811             -e '2 s,#,/*,' \
 812             -e '3,$ s,#,  ,' \
 813             -e '$ s,$, */,'
 814     fi
 815
 816     if class_is_predicate_p
 817     then
 818         if test -n "${macro}"
 819         then
 820             printf "\n"
 821             printf "#if defined (${macro})\n"
 822             printf "/* Legacy for systems yet to multi-arch ${macro} */\n"
 823             printf "#if !defined (${macro}_P)\n"
 824             printf "#define ${macro}_P() (1)\n"
 825             printf "#endif\n"
 826             printf "#endif\n"
 827         fi
 828         printf "\n"
 829         printf "extern int gdbarch_${function}_p (struct gdbarch *gdbarch);\n"
 830         if test -n "${macro}"
 831         then
 832             printf "#if !defined (GDB_TM_FILE) && defined (${macro}_P)\n"
 833             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 834             printf "#endif\n"
 835             printf "#if !defined (${macro}_P)\n"
 836             printf "#define ${macro}_P() (gdbarch_${function}_p (current_gdbarch))\n"
 837             printf "#endif\n"
 838         fi
 839     fi
 840     if class_is_variable_p
 841     then
 842         printf "\n"
 843         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 844         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, ${returntype} ${function});\n"
 845         if test -n "${macro}"
 846         then
 847             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 848             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 849             printf "#endif\n"
 850             printf "#if !defined (${macro})\n"
 851             printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 852             printf "#endif\n"
 853         fi
 854     fi
 855     if class_is_function_p
 856     then
 857         printf "\n"
 858         if [ "x${formal}" = "xvoid" ] && class_is_multiarch_p
 859         then
 860             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch);\n"
 861         elif class_is_multiarch_p
 862         then
 863             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch, ${formal});\n"
 864         else
 865             printf "typedef ${returntype} (gdbarch_${function}_ftype) (${formal});\n"
 866         fi
 867         if [ "x${formal}" = "xvoid" ]
 868         then
 869           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 870         else
 871           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch, ${formal});\n"
 872         fi
 873         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, gdbarch_${function}_ftype *${function});\n"
 874         if test -n "${macro}"
 875         then
 876             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 877             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 878             printf "#endif\n"
 879             if [ "x${actual}" = "x" ]
 880             then
 881                 d="#define ${macro}() (gdbarch_${function} (current_gdbarch))"
 882             elif [ "x${actual}" = "x-" ]
 883             then
 884                 d="#define ${macro} (gdbarch_${function} (current_gdbarch))"
 885             else
 886                 d="#define ${macro}(${actual}) (gdbarch_${function} (current_gdbarch, ${actual}))"
 887             fi
 888             printf "#if !defined (${macro})\n"
 889             if [ "x${actual}" = "x" ]
 890             then
 891                 printf "#define ${macro}() (gdbarch_${function} (current_gdbarch))\n"
 892             elif [ "x${actual}" = "x-" ]
 893             then
 894                 printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 895             else
 896                 printf "#define ${macro}(${actual}) (gdbarch_${function} (current_gdbarch, ${actual}))\n"
 897             fi
 898             printf "#endif\n"
 899         fi
 900     fi
 901 done
 902
 903 # close it off
 904 cat <<EOF
 905
 906 extern struct gdbarch_tdep *gdbarch_tdep (struct gdbarch *gdbarch);
 907
 908
 909 /* Mechanism for co-ordinating the selection of a specific
 910    architecture.
 911
 912    GDB targets (*-tdep.c) can register an interest in a specific
 913    architecture.  Other GDB components can register a need to maintain
 914    per-architecture data.
 915
 916    The mechanisms below ensures that there is only a loose connection
 917    between the set-architecture command and the various GDB
 918    components.  Each component can independently register their need
 919    to maintain architecture specific data with gdbarch.
 920
 921    Pragmatics:
 922
 923    Previously, a single TARGET_ARCHITECTURE_HOOK was provided.  It
 924    didn't scale.
 925
 926    The more traditional mega-struct containing architecture specific
 927    data for all the various GDB components was also considered.  Since
 928    GDB is built from a variable number of (fairly independent)
 929    components it was determined that the global aproach was not
 930    applicable. */
 931
 932
 933 /* Register a new architectural family with GDB.
 934
 935    Register support for the specified ARCHITECTURE with GDB.  When
 936    gdbarch determines that the specified architecture has been
 937    selected, the corresponding INIT function is called.
 938
 939    --
 940
 941    The INIT function takes two parameters: INFO which contains the
 942    information available to gdbarch about the (possibly new)
 943    architecture; ARCHES which is a list of the previously created
 944    \`\`struct gdbarch'' for this architecture.
 945
 946    The INFO parameter is, as far as possible, be pre-initialized with
 947    information obtained from INFO.ABFD or the previously selected
 948    architecture.
 949
 950    The ARCHES parameter is a linked list (sorted most recently used)
 951    of all the previously created architures for this architecture
 952    family.  The (possibly NULL) ARCHES->gdbarch can used to access
 953    values from the previously selected architecture for this
 954    architecture family.  The global \`\`current_gdbarch'' shall not be
 955    used.
 956
 957    The INIT function shall return any of: NULL - indicating that it
 958    doesn't recognize the selected architecture; an existing \`\`struct
 959    gdbarch'' from the ARCHES list - indicating that the new
 960    architecture is just a synonym for an earlier architecture (see
 961    gdbarch_list_lookup_by_info()); a newly created \`\`struct gdbarch''
 962    - that describes the selected architecture (see gdbarch_alloc()).
 963
 964    The DUMP_TDEP function shall print out all target specific values.
 965    Care should be taken to ensure that the function works in both the
 966    multi-arch and non- multi-arch cases. */
 967
 968 struct gdbarch_list
 969 {
 970   struct gdbarch *gdbarch;
 971   struct gdbarch_list *next;
 972 };
 973
 974 struct gdbarch_info
 975 {
 976   /* Use default: NULL (ZERO). */
 977   const struct bfd_arch_info *bfd_arch_info;
 978
 979   /* Use default: BFD_ENDIAN_UNKNOWN (NB: is not ZERO).  */
 980   int byte_order;
 981
 982   /* Use default: NULL (ZERO). */
 983   bfd *abfd;
 984
 985   /* Use default: NULL (ZERO). */
 986   struct gdbarch_tdep_info *tdep_info;
 987
 988   /* Use default: GDB_OSABI_UNINITIALIZED (-1).  */
 989   enum gdb_osabi osabi;
 990 };
 991
 992 typedef struct gdbarch *(gdbarch_init_ftype) (struct gdbarch_info info, struct gdbarch_list *arches);
 993 typedef void (gdbarch_dump_tdep_ftype) (struct gdbarch *gdbarch, struct ui_file *file);
 994
 995 /* DEPRECATED - use gdbarch_register() */
 996 extern void register_gdbarch_init (enum bfd_architecture architecture, gdbarch_init_ftype *);
 997
 998 extern void gdbarch_register (enum bfd_architecture architecture,
 999                               gdbarch_init_ftype *,
1000                               gdbarch_dump_tdep_ftype *);
1001
1002
1003 /* Return a freshly allocated, NULL terminated, array of the valid
1004    architecture names.  Since architectures are registered during the
1005    _initialize phase this function only returns useful information
1006    once initialization has been completed. */
1007
1008 extern const char **gdbarch_printable_names (void);
1009
1010
1011 /* Helper function.  Search the list of ARCHES for a GDBARCH that
1012    matches the information provided by INFO. */
1013
1014 extern struct gdbarch_list *gdbarch_list_lookup_by_info (struct gdbarch_list *arches,  const struct gdbarch_info *info);
1015
1016
1017 /* Helper function.  Create a preliminary \`\`struct gdbarch''.  Perform
1018    basic initialization using values obtained from the INFO andTDEP
1019    parameters.  set_gdbarch_*() functions are called to complete the
1020    initialization of the object. */
1021
1022 extern struct gdbarch *gdbarch_alloc (const struct gdbarch_info *info, struct gdbarch_tdep *tdep);
1023
1024
1025 /* Helper function.  Free a partially-constructed \`\`struct gdbarch''.
1026    It is assumed that the caller freeds the \`\`struct
1027    gdbarch_tdep''. */
1028
1029 extern void gdbarch_free (struct gdbarch *);
1030
1031
1032 /* Helper function.  Allocate memory from the \`\`struct gdbarch''
1033    obstack.  The memory is freed when the corresponding architecture
1034    is also freed.  */
1035
1036 extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
1037 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
1038 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
1039
1040
1041 /* Helper function. Force an update of the current architecture.
1042
1043    The actual architecture selected is determined by INFO, \`\`(gdb) set
1044    architecture'' et.al., the existing architecture and BFD's default
1045    architecture.  INFO should be initialized to zero and then selected
1046    fields should be updated.
1047
1048    Returns non-zero if the update succeeds */
1049
1050 extern int gdbarch_update_p (struct gdbarch_info info);
1051
1052
1053 /* Helper function.  Find an architecture matching info.
1054
1055    INFO should be initialized using gdbarch_info_init, relevant fields
1056    set, and then finished using gdbarch_info_fill.
1057
1058    Returns the corresponding architecture, or NULL if no matching
1059    architecture was found.  "current_gdbarch" is not updated.  */
1060
1061 extern struct gdbarch *gdbarch_find_by_info (struct gdbarch_info info);
1062
1063
1064 /* Helper function.  Set the global "current_gdbarch" to "gdbarch".
1065
1066    FIXME: kettenis/20031124: Of the functions that follow, only
1067    gdbarch_from_bfd is supposed to survive.  The others will
1068    dissappear since in the future GDB will (hopefully) be truly
1069    multi-arch.  However, for now we're still stuck with the concept of
1070    a single active architecture.  */
1071
1072 extern void deprecated_current_gdbarch_select_hack (struct gdbarch *gdbarch);
1073
1074
1075 /* Register per-architecture data-pointer.
1076
1077    Reserve space for a per-architecture data-pointer.  An identifier
1078    for the reserved data-pointer is returned.  That identifer should
1079    be saved in a local static variable.
1080
1081    Memory for the per-architecture data shall be allocated using
1082    gdbarch_obstack_zalloc.  That memory will be deleted when the
1083    corresponding architecture object is deleted.
1084
1085    When a previously created architecture is re-selected, the
1086    per-architecture data-pointer for that previous architecture is
1087    restored.  INIT() is not re-called.
1088
1089    Multiple registrarants for any architecture are allowed (and
1090    strongly encouraged).  */
1091
1092 struct gdbarch_data;
1093
1094 typedef void *(gdbarch_data_pre_init_ftype) (struct obstack *obstack);
1095 extern struct gdbarch_data *gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *init);
1096 typedef void *(gdbarch_data_post_init_ftype) (struct gdbarch *gdbarch);
1097 extern struct gdbarch_data *gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *init);
1098 extern void deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1099                                          struct gdbarch_data *data,
1100                                          void *pointer);
1101
1102 extern void *gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *);
1103
1104
1105
1106 /* Register per-architecture memory region.
1107
1108    Provide a memory-region swap mechanism.  Per-architecture memory
1109    region are created.  These memory regions are swapped whenever the
1110    architecture is changed.  For a new architecture, the memory region
1111    is initialized with zero (0) and the INIT function is called.
1112
1113    Memory regions are swapped / initialized in the order that they are
1114    registered.  NULL DATA and/or INIT values can be specified.
1115
1116    New code should use gdbarch_data_register_*(). */
1117
1118 typedef void (gdbarch_swap_ftype) (void);
1119 extern void deprecated_register_gdbarch_swap (void *data, unsigned long size, gdbarch_swap_ftype *init);
1120 #define DEPRECATED_REGISTER_GDBARCH_SWAP(VAR) deprecated_register_gdbarch_swap (&(VAR), sizeof ((VAR)), NULL)
1121
1122
1123
1124 /* Set the dynamic target-system-dependent parameters (architecture,
1125    byte-order, ...) using information found in the BFD */
1126
1127 extern void set_gdbarch_from_file (bfd *);
1128
1129
1130 /* Initialize the current architecture to the "first" one we find on
1131    our list.  */
1132
1133 extern void initialize_current_architecture (void);
1134
1135 /* gdbarch trace variable */
1136 extern int gdbarch_debug;
1137
1138 extern void gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file);
1139
1140 #endif
1141 EOF
1142 exec 1>&2
1143 #../move-if-change new-gdbarch.h gdbarch.h
1144 compare_new gdbarch.h
1145
1146
1147 #
1148 # C file
1149 #
1150
1151 exec > new-gdbarch.c
1152 copyright
1153 cat <<EOF
1154
1155 #include "defs.h"
1156 #include "arch-utils.h"
1157
1158 #include "gdbcmd.h"
1159 #include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */
1160 #include "symcat.h"
1161
1162 #include "floatformat.h"
1163
1164 #include "gdb_assert.h"
1165 #include "gdb_string.h"
1166 #include "gdb-events.h"
1167 #include "reggroups.h"
1168 #include "osabi.h"
1169 #include "gdb_obstack.h"
1170
1171 /* Static function declarations */
1172
1173 static void alloc_gdbarch_data (struct gdbarch *);
1174
1175 /* Non-zero if we want to trace architecture code.  */
1176
1177 #ifndef GDBARCH_DEBUG
1178 #define GDBARCH_DEBUG 0
1179 #endif
1180 int gdbarch_debug = GDBARCH_DEBUG;
1181 static void
1182 show_gdbarch_debug (struct ui_file *file, int from_tty,
1183                     struct cmd_list_element *c, const char *value)
1184 {
1185   fprintf_filtered (file, _("Architecture debugging is %s.\\n"), value);
1186 }
1187
1188 static const char *
1189 pformat (const struct floatformat *format)
1190 {
1191   if (format == NULL)
1192     return "(null)";
1193   else
1194     return  format->name;
1195 }
1196
1197 EOF
1198
1199 # gdbarch open the gdbarch object
1200 printf "\n"
1201 printf "/* Maintain the struct gdbarch object */\n"
1202 printf "\n"
1203 printf "struct gdbarch\n"
1204 printf "{\n"
1205 printf "  /* Has this architecture been fully initialized?  */\n"
1206 printf "  int initialized_p;\n"
1207 printf "\n"
1208 printf "  /* An obstack bound to the lifetime of the architecture.  */\n"
1209 printf "  struct obstack *obstack;\n"
1210 printf "\n"
1211 printf "  /* basic architectural information */\n"
1212 function_list | while do_read
1213 do
1214     if class_is_info_p
1215     then
1216         printf "  ${returntype} ${function};\n"
1217     fi
1218 done
1219 printf "\n"
1220 printf "  /* target specific vector. */\n"
1221 printf "  struct gdbarch_tdep *tdep;\n"
1222 printf "  gdbarch_dump_tdep_ftype *dump_tdep;\n"
1223 printf "\n"
1224 printf "  /* per-architecture data-pointers */\n"
1225 printf "  unsigned nr_data;\n"
1226 printf "  void **data;\n"
1227 printf "\n"
1228 printf "  /* per-architecture swap-regions */\n"
1229 printf "  struct gdbarch_swap *swap;\n"
1230 printf "\n"
1231 cat <<EOF
1232   /* Multi-arch values.
1233
1234      When extending this structure you must:
1235
1236      Add the field below.
1237
1238      Declare set/get functions and define the corresponding
1239      macro in gdbarch.h.
1240
1241      gdbarch_alloc(): If zero/NULL is not a suitable default,
1242      initialize the new field.
1243
1244      verify_gdbarch(): Confirm that the target updated the field
1245      correctly.
1246
1247      gdbarch_dump(): Add a fprintf_unfiltered call so that the new
1248      field is dumped out
1249
1250      \`\`startup_gdbarch()'': Append an initial value to the static
1251      variable (base values on the host's c-type system).
1252
1253      get_gdbarch(): Implement the set/get functions (probably using
1254      the macro's as shortcuts).
1255
1256      */
1257
1258 EOF
1259 function_list | while do_read
1260 do
1261     if class_is_variable_p
1262     then
1263         printf "  ${returntype} ${function};\n"
1264     elif class_is_function_p
1265     then
1266         printf "  gdbarch_${function}_ftype *${function};\n"
1267     fi
1268 done
1269 printf "};\n"
1270
1271 # A pre-initialized vector
1272 printf "\n"
1273 printf "\n"
1274 cat <<EOF
1275 /* The default architecture uses host values (for want of a better
1276    choice). */
1277 EOF
1278 printf "\n"
1279 printf "extern const struct bfd_arch_info bfd_default_arch_struct;\n"
1280 printf "\n"
1281 printf "struct gdbarch startup_gdbarch =\n"
1282 printf "{\n"
1283 printf "  1, /* Always initialized.  */\n"
1284 printf "  NULL, /* The obstack.  */\n"
1285 printf "  /* basic architecture information */\n"
1286 function_list | while do_read
1287 do
1288     if class_is_info_p
1289     then
1290         printf "  ${staticdefault},  /* ${function} */\n"
1291     fi
1292 done
1293 cat <<EOF
1294   /* target specific vector and its dump routine */
1295   NULL, NULL,
1296   /*per-architecture data-pointers and swap regions */
1297   0, NULL, NULL,
1298   /* Multi-arch values */
1299 EOF
1300 function_list | while do_read
1301 do
1302     if class_is_function_p || class_is_variable_p
1303     then
1304         printf "  ${staticdefault},  /* ${function} */\n"
1305     fi
1306 done
1307 cat <<EOF
1308   /* startup_gdbarch() */
1309 };
1310
1311 struct gdbarch *current_gdbarch = &startup_gdbarch;
1312 EOF
1313
1314 # Create a new gdbarch struct
1315 cat <<EOF
1316
1317 /* Create a new \`\`struct gdbarch'' based on information provided by
1318    \`\`struct gdbarch_info''. */
1319 EOF
1320 printf "\n"
1321 cat <<EOF
1322 struct gdbarch *
1323 gdbarch_alloc (const struct gdbarch_info *info,
1324                struct gdbarch_tdep *tdep)
1325 {
1326   /* NOTE: The new architecture variable is named \`\`current_gdbarch''
1327      so that macros such as TARGET_DOUBLE_BIT, when expanded, refer to
1328      the current local architecture and not the previous global
1329      architecture.  This ensures that the new architectures initial
1330      values are not influenced by the previous architecture.  Once
1331      everything is parameterised with gdbarch, this will go away.  */
1332   struct gdbarch *current_gdbarch;
1333
1334   /* Create an obstack for allocating all the per-architecture memory,
1335      then use that to allocate the architecture vector.  */
1336   struct obstack *obstack = XMALLOC (struct obstack);
1337   obstack_init (obstack);
1338   current_gdbarch = obstack_alloc (obstack, sizeof (*current_gdbarch));
1339   memset (current_gdbarch, 0, sizeof (*current_gdbarch));
1340   current_gdbarch->obstack = obstack;
1341
1342   alloc_gdbarch_data (current_gdbarch);
1343
1344   current_gdbarch->tdep = tdep;
1345 EOF
1346 printf "\n"
1347 function_list | while do_read
1348 do
1349     if class_is_info_p
1350     then
1351         printf "  current_gdbarch->${function} = info->${function};\n"
1352     fi
1353 done
1354 printf "\n"
1355 printf "  /* Force the explicit initialization of these. */\n"
1356 function_list | while do_read
1357 do
1358     if class_is_function_p || class_is_variable_p
1359     then
1360         if [ -n "${predefault}" -a "x${predefault}" != "x0" ]
1361         then
1362           printf "  current_gdbarch->${function} = ${predefault};\n"
1363         fi
1364     fi
1365 done
1366 cat <<EOF
1367   /* gdbarch_alloc() */
1368
1369   return current_gdbarch;
1370 }
1371 EOF
1372
1373 # Free a gdbarch struct.
1374 printf "\n"
1375 printf "\n"
1376 cat <<EOF
1377 /* Allocate extra space using the per-architecture obstack.  */
1378
1379 void *
1380 gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
1381 {
1382   void *data = obstack_alloc (arch->obstack, size);
1383   memset (data, 0, size);
1384   return data;
1385 }
1386
1387
1388 /* Free a gdbarch struct.  This should never happen in normal
1389    operation --- once you've created a gdbarch, you keep it around.
1390    However, if an architecture's init function encounters an error
1391    building the structure, it may need to clean up a partially
1392    constructed gdbarch.  */
1393
1394 void
1395 gdbarch_free (struct gdbarch *arch)
1396 {
1397   struct obstack *obstack;
1398   gdb_assert (arch != NULL);
1399   gdb_assert (!arch->initialized_p);
1400   obstack = arch->obstack;
1401   obstack_free (obstack, 0); /* Includes the ARCH.  */
1402   xfree (obstack);
1403 }
1404 EOF
1405
1406 # verify a new architecture
1407 cat <<EOF
1408
1409
1410 /* Ensure that all values in a GDBARCH are reasonable.  */
1411
1412 /* NOTE/WARNING: The parameter is called \`\`current_gdbarch'' so that it
1413    just happens to match the global variable \`\`current_gdbarch''.  That
1414    way macros refering to that variable get the local and not the global
1415    version - ulgh.  Once everything is parameterised with gdbarch, this
1416    will go away. */
1417
1418 static void
1419 verify_gdbarch (struct gdbarch *current_gdbarch)
1420 {
1421   struct ui_file *log;
1422   struct cleanup *cleanups;
1423   long dummy;
1424   char *buf;
1425   log = mem_fileopen ();
1426   cleanups = make_cleanup_ui_file_delete (log);
1427   /* fundamental */
1428   if (current_gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)
1429     fprintf_unfiltered (log, "\n\tbyte-order");
1430   if (current_gdbarch->bfd_arch_info == NULL)
1431     fprintf_unfiltered (log, "\n\tbfd_arch_info");
1432   /* Check those that need to be defined for the given multi-arch level. */
1433 EOF
1434 function_list | while do_read
1435 do
1436     if class_is_function_p || class_is_variable_p
1437     then
1438         if [ "x${invalid_p}" = "x0" ]
1439         then
1440             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1441         elif class_is_predicate_p
1442         then
1443             printf "  /* Skip verify of ${function}, has predicate */\n"
1444         # FIXME: See do_read for potential simplification
1445         elif [ -n "${invalid_p}" -a -n "${postdefault}" ]
1446         then
1447             printf "  if (${invalid_p})\n"
1448             printf "    current_gdbarch->${function} = ${postdefault};\n"
1449         elif [ -n "${predefault}" -a -n "${postdefault}" ]
1450         then
1451             printf "  if (current_gdbarch->${function} == ${predefault})\n"
1452             printf "    current_gdbarch->${function} = ${postdefault};\n"
1453         elif [ -n "${postdefault}" ]
1454         then
1455             printf "  if (current_gdbarch->${function} == 0)\n"
1456             printf "    current_gdbarch->${function} = ${postdefault};\n"
1457         elif [ -n "${invalid_p}" ]
1458         then
1459             printf "  if (${invalid_p})\n"
1460             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1461         elif [ -n "${predefault}" ]
1462         then
1463             printf "  if (current_gdbarch->${function} == ${predefault})\n"
1464             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1465         fi
1466     fi
1467 done
1468 cat <<EOF
1469   buf = ui_file_xstrdup (log, &dummy);
1470   make_cleanup (xfree, buf);
1471   if (strlen (buf) > 0)
1472     internal_error (__FILE__, __LINE__,
1473                     _("verify_gdbarch: the following are invalid ...%s"),
1474                     buf);
1475   do_cleanups (cleanups);
1476 }
1477 EOF
1478
1479 # dump the structure
1480 printf "\n"
1481 printf "\n"
1482 cat <<EOF
1483 /* Print out the details of the current architecture. */
1484
1485 /* NOTE/WARNING: The parameter is called \`\`current_gdbarch'' so that it
1486    just happens to match the global variable \`\`current_gdbarch''.  That
1487    way macros refering to that variable get the local and not the global
1488    version - ulgh.  Once everything is parameterised with gdbarch, this
1489    will go away. */
1490
1491 void
1492 gdbarch_dump (struct gdbarch *current_gdbarch, struct ui_file *file)
1493 {
1494   const char *gdb_xm_file = "<not-defined>";
1495   const char *gdb_nm_file = "<not-defined>";
1496   const char *gdb_tm_file = "<not-defined>";
1497 #if defined (GDB_XM_FILE)
1498   gdb_xm_file = GDB_XM_FILE;
1499 #endif
1500   fprintf_unfiltered (file,
1501                       "gdbarch_dump: GDB_XM_FILE = %s\\n",
1502                       gdb_xm_file);
1503 #if defined (GDB_NM_FILE)
1504   gdb_nm_file = GDB_NM_FILE;
1505 #endif
1506   fprintf_unfiltered (file,
1507                       "gdbarch_dump: GDB_NM_FILE = %s\\n",
1508                       gdb_nm_file);
1509 #if defined (GDB_TM_FILE)
1510   gdb_tm_file = GDB_TM_FILE;
1511 #endif
1512   fprintf_unfiltered (file,
1513                       "gdbarch_dump: GDB_TM_FILE = %s\\n",
1514                       gdb_tm_file);
1515 EOF
1516 function_list | sort -t: -k 4 | while do_read
1517 do
1518     # First the predicate
1519     if class_is_predicate_p
1520     then
1521         if test -n "${macro}"
1522         then
1523             printf "#ifdef ${macro}_P\n"
1524             printf "  fprintf_unfiltered (file,\n"
1525             printf "                      \"gdbarch_dump: %%s # %%s\\\\n\",\n"
1526             printf "                      \"${macro}_P()\",\n"
1527             printf "                      XSTRING (${macro}_P ()));\n"
1528             printf "#endif\n"
1529         fi
1530         printf "  fprintf_unfiltered (file,\n"
1531         printf "                      \"gdbarch_dump: gdbarch_${function}_p() = %%d\\\\n\",\n"
1532         printf "                      gdbarch_${function}_p (current_gdbarch));\n"
1533     fi
1534     # Print the macro definition.
1535     if test -n "${macro}"
1536     then
1537         printf "#ifdef ${macro}\n"
1538         if class_is_function_p
1539         then
1540             printf "  fprintf_unfiltered (file,\n"
1541             printf "                      \"gdbarch_dump: %%s # %%s\\\\n\",\n"
1542             printf "                      \"${macro}(${actual})\",\n"
1543             printf "                      XSTRING (${macro} (${actual})));\n"
1544         else
1545             printf "  fprintf_unfiltered (file,\n"
1546             printf "                      \"gdbarch_dump: ${macro} # %%s\\\\n\",\n"
1547             printf "                      XSTRING (${macro}));\n"
1548         fi
1549         printf "#endif\n"
1550     fi
1551     # Print the corresponding value.
1552     if class_is_function_p
1553     then
1554         printf "  fprintf_unfiltered (file,\n"
1555         printf "                      \"gdbarch_dump: ${function} = <0x%%lx>\\\\n\",\n"
1556         printf "                      (long) current_gdbarch->${function});\n"
1557     else
1558         # It is a variable
1559         case "${print}:${returntype}" in
1560             :CORE_ADDR )
1561                 fmt="0x%s"
1562                 print="paddr_nz (current_gdbarch->${function})"
1563                 ;;
1564             :* )
1565                 fmt="%s"
1566                 print="paddr_d (current_gdbarch->${function})"
1567                 ;;
1568             * )
1569                 fmt="%s"
1570                 ;;
1571         esac
1572         printf "  fprintf_unfiltered (file,\n"
1573         printf "                      \"gdbarch_dump: ${function} = %s\\\\n\",\n" "${fmt}"
1574         printf "                      ${print});\n"
1575     fi
1576 done
1577 cat <<EOF
1578   if (current_gdbarch->dump_tdep != NULL)
1579     current_gdbarch->dump_tdep (current_gdbarch, file);
1580 }
1581 EOF
1582
1583
1584 # GET/SET
1585 printf "\n"
1586 cat <<EOF
1587 struct gdbarch_tdep *
1588 gdbarch_tdep (struct gdbarch *gdbarch)
1589 {
1590   if (gdbarch_debug >= 2)
1591     fprintf_unfiltered (gdb_stdlog, "gdbarch_tdep called\\n");
1592   return gdbarch->tdep;
1593 }
1594 EOF
1595 printf "\n"
1596 function_list | while do_read
1597 do
1598     if class_is_predicate_p
1599     then
1600         printf "\n"
1601         printf "int\n"
1602         printf "gdbarch_${function}_p (struct gdbarch *gdbarch)\n"
1603         printf "{\n"
1604         printf "  gdb_assert (gdbarch != NULL);\n"
1605         printf "  return ${predicate};\n"
1606         printf "}\n"
1607     fi
1608     if class_is_function_p
1609     then
1610         printf "\n"
1611         printf "${returntype}\n"
1612         if [ "x${formal}" = "xvoid" ]
1613         then
1614           printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1615         else
1616           printf "gdbarch_${function} (struct gdbarch *gdbarch, ${formal})\n"
1617         fi
1618         printf "{\n"
1619         printf "  gdb_assert (gdbarch != NULL);\n"
1620         printf "  gdb_assert (gdbarch->${function} != NULL);\n"
1621         if class_is_predicate_p && test -n "${predefault}"
1622         then
1623             # Allow a call to a function with a predicate.
1624             printf "  /* Do not check predicate: ${predicate}, allow call.  */\n"
1625         fi
1626         printf "  if (gdbarch_debug >= 2)\n"
1627         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1628         if [ "x${actual}" = "x-" -o "x${actual}" = "x" ]
1629         then
1630             if class_is_multiarch_p
1631             then
1632                 params="gdbarch"
1633             else
1634                 params=""
1635             fi
1636         else
1637             if class_is_multiarch_p
1638             then
1639                 params="gdbarch, ${actual}"
1640             else
1641                 params="${actual}"
1642             fi
1643         fi
1644         if [ "x${returntype}" = "xvoid" ]
1645         then
1646           printf "  gdbarch->${function} (${params});\n"
1647         else
1648           printf "  return gdbarch->${function} (${params});\n"
1649         fi
1650         printf "}\n"
1651         printf "\n"
1652         printf "void\n"
1653         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1654         printf "            `echo ${function} | sed -e 's/./ /g'`  gdbarch_${function}_ftype ${function})\n"
1655         printf "{\n"
1656         printf "  gdbarch->${function} = ${function};\n"
1657         printf "}\n"
1658     elif class_is_variable_p
1659     then
1660         printf "\n"
1661         printf "${returntype}\n"
1662         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1663         printf "{\n"
1664         printf "  gdb_assert (gdbarch != NULL);\n"
1665         if [ "x${invalid_p}" = "x0" ]
1666         then
1667             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1668         elif [ -n "${invalid_p}" ]
1669         then
1670             printf "  /* Check variable is valid.  */\n"
1671             printf "  gdb_assert (!(${invalid_p}));\n"
1672         elif [ -n "${predefault}" ]
1673         then
1674             printf "  /* Check variable changed from pre-default.  */\n"
1675             printf "  gdb_assert (gdbarch->${function} != ${predefault});\n"
1676         fi
1677         printf "  if (gdbarch_debug >= 2)\n"
1678         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1679         printf "  return gdbarch->${function};\n"
1680         printf "}\n"
1681         printf "\n"
1682         printf "void\n"
1683         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1684         printf "            `echo ${function} | sed -e 's/./ /g'`  ${returntype} ${function})\n"
1685         printf "{\n"
1686         printf "  gdbarch->${function} = ${function};\n"
1687         printf "}\n"
1688     elif class_is_info_p
1689     then
1690         printf "\n"
1691         printf "${returntype}\n"
1692         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1693         printf "{\n"
1694         printf "  gdb_assert (gdbarch != NULL);\n"
1695         printf "  if (gdbarch_debug >= 2)\n"
1696         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1697         printf "  return gdbarch->${function};\n"
1698         printf "}\n"
1699     fi
1700 done
1701
1702 # All the trailing guff
1703 cat <<EOF
1704
1705
1706 /* Keep a registry of per-architecture data-pointers required by GDB
1707    modules. */
1708
1709 struct gdbarch_data
1710 {
1711   unsigned index;
1712   int init_p;
1713   gdbarch_data_pre_init_ftype *pre_init;
1714   gdbarch_data_post_init_ftype *post_init;
1715 };
1716
1717 struct gdbarch_data_registration
1718 {
1719   struct gdbarch_data *data;
1720   struct gdbarch_data_registration *next;
1721 };
1722
1723 struct gdbarch_data_registry
1724 {
1725   unsigned nr;
1726   struct gdbarch_data_registration *registrations;
1727 };
1728
1729 struct gdbarch_data_registry gdbarch_data_registry =
1730 {
1731   0, NULL,
1732 };
1733
1734 static struct gdbarch_data *
1735 gdbarch_data_register (gdbarch_data_pre_init_ftype *pre_init,
1736                        gdbarch_data_post_init_ftype *post_init)
1737 {
1738   struct gdbarch_data_registration **curr;
1739   /* Append the new registraration.  */
1740   for (curr = &gdbarch_data_registry.registrations;
1741        (*curr) != NULL;
1742        curr = &(*curr)->next);
1743   (*curr) = XMALLOC (struct gdbarch_data_registration);
1744   (*curr)->next = NULL;
1745   (*curr)->data = XMALLOC (struct gdbarch_data);
1746   (*curr)->data->index = gdbarch_data_registry.nr++;
1747   (*curr)->data->pre_init = pre_init;
1748   (*curr)->data->post_init = post_init;
1749   (*curr)->data->init_p = 1;
1750   return (*curr)->data;
1751 }
1752
1753 struct gdbarch_data *
1754 gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *pre_init)
1755 {
1756   return gdbarch_data_register (pre_init, NULL);
1757 }
1758
1759 struct gdbarch_data *
1760 gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *post_init)
1761 {
1762   return gdbarch_data_register (NULL, post_init);
1763 }
1764
1765 /* Create/delete the gdbarch data vector. */
1766
1767 static void
1768 alloc_gdbarch_data (struct gdbarch *gdbarch)
1769 {
1770   gdb_assert (gdbarch->data == NULL);
1771   gdbarch->nr_data = gdbarch_data_registry.nr;
1772   gdbarch->data = GDBARCH_OBSTACK_CALLOC (gdbarch, gdbarch->nr_data, void *);
1773 }
1774
1775 /* Initialize the current value of the specified per-architecture
1776    data-pointer. */
1777
1778 void
1779 deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1780                              struct gdbarch_data *data,
1781                              void *pointer)
1782 {
1783   gdb_assert (data->index < gdbarch->nr_data);
1784   gdb_assert (gdbarch->data[data->index] == NULL);
1785   gdb_assert (data->pre_init == NULL);
1786   gdbarch->data[data->index] = pointer;
1787 }
1788
1789 /* Return the current value of the specified per-architecture
1790    data-pointer. */
1791
1792 void *
1793 gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *data)
1794 {
1795   gdb_assert (data->index < gdbarch->nr_data);
1796   if (gdbarch->data[data->index] == NULL)
1797     {
1798       /* The data-pointer isn't initialized, call init() to get a
1799          value.  */
1800       if (data->pre_init != NULL)
1801         /* Mid architecture creation: pass just the obstack, and not
1802            the entire architecture, as that way it isn't possible for
1803            pre-init code to refer to undefined architecture
1804            fields.  */
1805         gdbarch->data[data->index] = data->pre_init (gdbarch->obstack);
1806       else if (gdbarch->initialized_p
1807                && data->post_init != NULL)
1808         /* Post architecture creation: pass the entire architecture
1809            (as all fields are valid), but be careful to also detect
1810            recursive references.  */
1811         {
1812           gdb_assert (data->init_p);
1813           data->init_p = 0;
1814           gdbarch->data[data->index] = data->post_init (gdbarch);
1815           data->init_p = 1;
1816         }
1817       else
1818         /* The architecture initialization hasn't completed - punt -
1819          hope that the caller knows what they are doing.  Once
1820          deprecated_set_gdbarch_data has been initialized, this can be
1821          changed to an internal error.  */
1822         return NULL;
1823       gdb_assert (gdbarch->data[data->index] != NULL);
1824     }
1825   return gdbarch->data[data->index];
1826 }
1827
1828
1829
1830 /* Keep a registry of swapped data required by GDB modules. */
1831
1832 struct gdbarch_swap
1833 {
1834   void *swap;
1835   struct gdbarch_swap_registration *source;
1836   struct gdbarch_swap *next;
1837 };
1838
1839 struct gdbarch_swap_registration
1840 {
1841   void *data;
1842   unsigned long sizeof_data;
1843   gdbarch_swap_ftype *init;
1844   struct gdbarch_swap_registration *next;
1845 };
1846
1847 struct gdbarch_swap_registry
1848 {
1849   int nr;
1850   struct gdbarch_swap_registration *registrations;
1851 };
1852
1853 struct gdbarch_swap_registry gdbarch_swap_registry =
1854 {
1855   0, NULL,
1856 };
1857
1858 void
1859 deprecated_register_gdbarch_swap (void *data,
1860                                   unsigned long sizeof_data,
1861                                   gdbarch_swap_ftype *init)
1862 {
1863   struct gdbarch_swap_registration **rego;
1864   for (rego = &gdbarch_swap_registry.registrations;
1865        (*rego) != NULL;
1866        rego = &(*rego)->next);
1867   (*rego) = XMALLOC (struct gdbarch_swap_registration);
1868   (*rego)->next = NULL;
1869   (*rego)->init = init;
1870   (*rego)->data = data;
1871   (*rego)->sizeof_data = sizeof_data;
1872 }
1873
1874 static void
1875 current_gdbarch_swap_init_hack (void)
1876 {
1877   struct gdbarch_swap_registration *rego;
1878   struct gdbarch_swap **curr = &current_gdbarch->swap;
1879   for (rego = gdbarch_swap_registry.registrations;
1880        rego != NULL;
1881        rego = rego->next)
1882     {
1883       if (rego->data != NULL)
1884         {
1885           (*curr) = GDBARCH_OBSTACK_ZALLOC (current_gdbarch,
1886                                             struct gdbarch_swap);
1887           (*curr)->source = rego;
1888           (*curr)->swap = gdbarch_obstack_zalloc (current_gdbarch,
1889                                                   rego->sizeof_data);
1890           (*curr)->next = NULL;
1891           curr = &(*curr)->next;
1892         }
1893       if (rego->init != NULL)
1894         rego->init ();
1895     }
1896 }
1897
1898 static struct gdbarch *
1899 current_gdbarch_swap_out_hack (void)
1900 {
1901   struct gdbarch *old_gdbarch = current_gdbarch;
1902   struct gdbarch_swap *curr;
1903
1904   gdb_assert (old_gdbarch != NULL);
1905   for (curr = old_gdbarch->swap;
1906        curr != NULL;
1907        curr = curr->next)
1908     {
1909       memcpy (curr->swap, curr->source->data, curr->source->sizeof_data);
1910       memset (curr->source->data, 0, curr->source->sizeof_data);
1911     }
1912   current_gdbarch = NULL;
1913   return old_gdbarch;
1914 }
1915
1916 static void
1917 current_gdbarch_swap_in_hack (struct gdbarch *new_gdbarch)
1918 {
1919   struct gdbarch_swap *curr;
1920
1921   gdb_assert (current_gdbarch == NULL);
1922   for (curr = new_gdbarch->swap;
1923        curr != NULL;
1924        curr = curr->next)
1925     memcpy (curr->source->data, curr->swap, curr->source->sizeof_data);
1926   current_gdbarch = new_gdbarch;
1927 }
1928
1929
1930 /* Keep a registry of the architectures known by GDB. */
1931
1932 struct gdbarch_registration
1933 {
1934   enum bfd_architecture bfd_architecture;
1935   gdbarch_init_ftype *init;
1936   gdbarch_dump_tdep_ftype *dump_tdep;
1937   struct gdbarch_list *arches;
1938   struct gdbarch_registration *next;
1939 };
1940
1941 static struct gdbarch_registration *gdbarch_registry = NULL;
1942
1943 static void
1944 append_name (const char ***buf, int *nr, const char *name)
1945 {
1946   *buf = xrealloc (*buf, sizeof (char**) * (*nr + 1));
1947   (*buf)[*nr] = name;
1948   *nr += 1;
1949 }
1950
1951 const char **
1952 gdbarch_printable_names (void)
1953 {
1954   /* Accumulate a list of names based on the registed list of
1955      architectures. */
1956   enum bfd_architecture a;
1957   int nr_arches = 0;
1958   const char **arches = NULL;
1959   struct gdbarch_registration *rego;
1960   for (rego = gdbarch_registry;
1961        rego != NULL;
1962        rego = rego->next)
1963     {
1964       const struct bfd_arch_info *ap;
1965       ap = bfd_lookup_arch (rego->bfd_architecture, 0);
1966       if (ap == NULL)
1967         internal_error (__FILE__, __LINE__,
1968                         _("gdbarch_architecture_names: multi-arch unknown"));
1969       do
1970         {
1971           append_name (&arches, &nr_arches, ap->printable_name);
1972           ap = ap->next;
1973         }
1974       while (ap != NULL);
1975     }
1976   append_name (&arches, &nr_arches, NULL);
1977   return arches;
1978 }
1979
1980
1981 void
1982 gdbarch_register (enum bfd_architecture bfd_architecture,
1983                   gdbarch_init_ftype *init,
1984                   gdbarch_dump_tdep_ftype *dump_tdep)
1985 {
1986   struct gdbarch_registration **curr;
1987   const struct bfd_arch_info *bfd_arch_info;
1988   /* Check that BFD recognizes this architecture */
1989   bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0);
1990   if (bfd_arch_info == NULL)
1991     {
1992       internal_error (__FILE__, __LINE__,
1993                       _("gdbarch: Attempt to register unknown architecture (%d)"),
1994                       bfd_architecture);
1995     }
1996   /* Check that we haven't seen this architecture before */
1997   for (curr = &gdbarch_registry;
1998        (*curr) != NULL;
1999        curr = &(*curr)->next)
2000     {
2001       if (bfd_architecture == (*curr)->bfd_architecture)
2002         internal_error (__FILE__, __LINE__,
2003                         _("gdbarch: Duplicate registraration of architecture (%s)"),
2004                         bfd_arch_info->printable_name);
2005     }
2006   /* log it */
2007   if (gdbarch_debug)
2008     fprintf_unfiltered (gdb_stdlog, "register_gdbarch_init (%s, 0x%08lx)\n",
2009                         bfd_arch_info->printable_name,
2010                         (long) init);
2011   /* Append it */
2012   (*curr) = XMALLOC (struct gdbarch_registration);
2013   (*curr)->bfd_architecture = bfd_architecture;
2014   (*curr)->init = init;
2015   (*curr)->dump_tdep = dump_tdep;
2016   (*curr)->arches = NULL;
2017   (*curr)->next = NULL;
2018 }
2019
2020 void
2021 register_gdbarch_init (enum bfd_architecture bfd_architecture,
2022                        gdbarch_init_ftype *init)
2023 {
2024   gdbarch_register (bfd_architecture, init, NULL);
2025 }
2026
2027
2028 /* Look for an architecture using gdbarch_info.  Base search on only
2029    BFD_ARCH_INFO and BYTE_ORDER. */
2030
2031 struct gdbarch_list *
2032 gdbarch_list_lookup_by_info (struct gdbarch_list *arches,
2033                              const struct gdbarch_info *info)
2034 {
2035   for (; arches != NULL; arches = arches->next)
2036     {
2037       if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info)
2038         continue;
2039       if (info->byte_order != arches->gdbarch->byte_order)
2040         continue;
2041       if (info->osabi != arches->gdbarch->osabi)
2042         continue;
2043       return arches;
2044     }
2045   return NULL;
2046 }
2047
2048
2049 /* Find an architecture that matches the specified INFO.  Create a new
2050    architecture if needed.  Return that new architecture.  Assumes
2051    that there is no current architecture.  */
2052
2053 static struct gdbarch *
2054 find_arch_by_info (struct gdbarch *old_gdbarch, struct gdbarch_info info)
2055 {
2056   struct gdbarch *new_gdbarch;
2057   struct gdbarch_registration *rego;
2058
2059   /* The existing architecture has been swapped out - all this code
2060      works from a clean slate.  */
2061   gdb_assert (current_gdbarch == NULL);
2062
2063   /* Fill in missing parts of the INFO struct using a number of
2064      sources: "set ..."; INFOabfd supplied; and the existing
2065      architecture.  */
2066   gdbarch_info_fill (old_gdbarch, &info);
2067
2068   /* Must have found some sort of architecture. */
2069   gdb_assert (info.bfd_arch_info != NULL);
2070
2071   if (gdbarch_debug)
2072     {
2073       fprintf_unfiltered (gdb_stdlog,
2074                           "find_arch_by_info: info.bfd_arch_info %s\n",
2075                           (info.bfd_arch_info != NULL
2076                            ? info.bfd_arch_info->printable_name
2077                            : "(null)"));
2078       fprintf_unfiltered (gdb_stdlog,
2079                           "find_arch_by_info: info.byte_order %d (%s)\n",
2080                           info.byte_order,
2081                           (info.byte_order == BFD_ENDIAN_BIG ? "big"
2082                            : info.byte_order == BFD_ENDIAN_LITTLE ? "little"
2083                            : "default"));
2084       fprintf_unfiltered (gdb_stdlog,
2085                           "find_arch_by_info: info.osabi %d (%s)\n",
2086                           info.osabi, gdbarch_osabi_name (info.osabi));
2087       fprintf_unfiltered (gdb_stdlog,
2088                           "find_arch_by_info: info.abfd 0x%lx\n",
2089                           (long) info.abfd);
2090       fprintf_unfiltered (gdb_stdlog,
2091                           "find_arch_by_info: info.tdep_info 0x%lx\n",
2092                           (long) info.tdep_info);
2093     }
2094
2095   /* Find the tdep code that knows about this architecture.  */
2096   for (rego = gdbarch_registry;
2097        rego != NULL;
2098        rego = rego->next)
2099     if (rego->bfd_architecture == info.bfd_arch_info->arch)
2100       break;
2101   if (rego == NULL)
2102     {
2103       if (gdbarch_debug)
2104         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2105                             "No matching architecture\n");
2106       return 0;
2107     }
2108
2109   /* Ask the tdep code for an architecture that matches "info".  */
2110   new_gdbarch = rego->init (info, rego->arches);
2111
2112   /* Did the tdep code like it?  No.  Reject the change and revert to
2113      the old architecture.  */
2114   if (new_gdbarch == NULL)
2115     {
2116       if (gdbarch_debug)
2117         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2118                             "Target rejected architecture\n");
2119       return NULL;
2120     }
2121
2122   /* Is this a pre-existing architecture (as determined by already
2123      being initialized)?  Move it to the front of the architecture
2124      list (keeping the list sorted Most Recently Used).  */
2125   if (new_gdbarch->initialized_p)
2126     {
2127       struct gdbarch_list **list;
2128       struct gdbarch_list *this;
2129       if (gdbarch_debug)
2130         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2131                             "Previous architecture 0x%08lx (%s) selected\n",
2132                             (long) new_gdbarch,
2133                             new_gdbarch->bfd_arch_info->printable_name);
2134       /* Find the existing arch in the list.  */
2135       for (list = &rego->arches;
2136            (*list) != NULL && (*list)->gdbarch != new_gdbarch;
2137            list = &(*list)->next);
2138       /* It had better be in the list of architectures.  */
2139       gdb_assert ((*list) != NULL && (*list)->gdbarch == new_gdbarch);
2140       /* Unlink THIS.  */
2141       this = (*list);
2142       (*list) = this->next;
2143       /* Insert THIS at the front.  */
2144       this->next = rego->arches;
2145       rego->arches = this;
2146       /* Return it.  */
2147       return new_gdbarch;
2148     }
2149
2150   /* It's a new architecture.  */
2151   if (gdbarch_debug)
2152     fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2153                         "New architecture 0x%08lx (%s) selected\n",
2154                         (long) new_gdbarch,
2155                         new_gdbarch->bfd_arch_info->printable_name);
2156
2157   /* Insert the new architecture into the front of the architecture
2158      list (keep the list sorted Most Recently Used).  */
2159   {
2160     struct gdbarch_list *this = XMALLOC (struct gdbarch_list);
2161     this->next = rego->arches;
2162     this->gdbarch = new_gdbarch;
2163     rego->arches = this;
2164   }
2165
2166   /* Check that the newly installed architecture is valid.  Plug in
2167      any post init values.  */
2168   new_gdbarch->dump_tdep = rego->dump_tdep;
2169   verify_gdbarch (new_gdbarch);
2170   new_gdbarch->initialized_p = 1;
2171
2172   /* Initialize any per-architecture swap areas.  This phase requires
2173      a valid global CURRENT_GDBARCH.  Set it momentarially, and then
2174      swap the entire architecture out.  */
2175   current_gdbarch = new_gdbarch;
2176   current_gdbarch_swap_init_hack ();
2177   current_gdbarch_swap_out_hack ();
2178
2179   if (gdbarch_debug)
2180     gdbarch_dump (new_gdbarch, gdb_stdlog);
2181
2182   return new_gdbarch;
2183 }
2184
2185 struct gdbarch *
2186 gdbarch_find_by_info (struct gdbarch_info info)
2187 {
2188   /* Save the previously selected architecture, setting the global to
2189      NULL.  This stops things like gdbarch->init() trying to use the
2190      previous architecture's configuration.  The previous architecture
2191      may not even be of the same architecture family.  The most recent
2192      architecture of the same family is found at the head of the
2193      rego->arches list.  */
2194   struct gdbarch *old_gdbarch = current_gdbarch_swap_out_hack ();
2195
2196   /* Find the specified architecture.  */
2197   struct gdbarch *new_gdbarch = find_arch_by_info (old_gdbarch, info);
2198
2199   /* Restore the existing architecture.  */
2200   gdb_assert (current_gdbarch == NULL);
2201   current_gdbarch_swap_in_hack (old_gdbarch);
2202
2203   return new_gdbarch;
2204 }
2205
2206 /* Make the specified architecture current, swapping the existing one
2207    out.  */
2208
2209 void
2210 deprecated_current_gdbarch_select_hack (struct gdbarch *new_gdbarch)
2211 {
2212   gdb_assert (new_gdbarch != NULL);
2213   gdb_assert (current_gdbarch != NULL);
2214   gdb_assert (new_gdbarch->initialized_p);
2215   current_gdbarch_swap_out_hack ();
2216   current_gdbarch_swap_in_hack (new_gdbarch);
2217   architecture_changed_event ();
2218   flush_cached_frames ();
2219 }
2220
2221 extern void _initialize_gdbarch (void);
2222
2223 void
2224 _initialize_gdbarch (void)
2225 {
2226   struct cmd_list_element *c;
2227
2228   add_setshow_zinteger_cmd ("arch", class_maintenance, &gdbarch_debug, _("\\
2229 Set architecture debugging."), _("\\
2230 Show architecture debugging."), _("\\
2231 When non-zero, architecture debugging is enabled."),
2232                             NULL,
2233                             show_gdbarch_debug,
2234                             &setdebuglist, &showdebuglist);
2235 }
2236 EOF
2237
2238 # close things off
2239 exec 1>&2
2240 #../move-if-change new-gdbarch.c gdbarch.c
2241 compare_new gdbarch.c