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 not 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:=: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 (C) 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., 51 Franklin Street, Fifth Floor,
 734    Boston, MA 02110-1301, 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 struct bp_target_info;
 774
 775 extern struct gdbarch *current_gdbarch;
 776 EOF
 777
 778 # function typedef's
 779 printf "\n"
 780 printf "\n"
 781 printf "/* The following are pre-initialized by GDBARCH. */\n"
 782 function_list | while do_read
 783 do
 784     if class_is_info_p
 785     then
 786         printf "\n"
 787         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 788         printf "/* set_gdbarch_${function}() - not applicable - pre-initialized. */\n"
 789         if test -n "${macro}"
 790         then
 791             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 792             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 793             printf "#endif\n"
 794             printf "#if !defined (${macro})\n"
 795             printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 796             printf "#endif\n"
 797         fi
 798     fi
 799 done
 800
 801 # function typedef's
 802 printf "\n"
 803 printf "\n"
 804 printf "/* The following are initialized by the target dependent code. */\n"
 805 function_list | while do_read
 806 do
 807     if [ -n "${comment}" ]
 808     then
 809         echo "${comment}" | sed \
 810             -e '2 s,#,/*,' \
 811             -e '3,$ s,#,  ,' \
 812             -e '$ s,$, */,'
 813     fi
 814
 815     if class_is_predicate_p
 816     then
 817         if test -n "${macro}"
 818         then
 819             printf "\n"
 820             printf "#if defined (${macro})\n"
 821             printf "/* Legacy for systems yet to multi-arch ${macro} */\n"
 822             printf "#if !defined (${macro}_P)\n"
 823             printf "#define ${macro}_P() (1)\n"
 824             printf "#endif\n"
 825             printf "#endif\n"
 826         fi
 827         printf "\n"
 828         printf "extern int gdbarch_${function}_p (struct gdbarch *gdbarch);\n"
 829         if test -n "${macro}"
 830         then
 831             printf "#if !defined (GDB_TM_FILE) && defined (${macro}_P)\n"
 832             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 833             printf "#endif\n"
 834             printf "#if !defined (${macro}_P)\n"
 835             printf "#define ${macro}_P() (gdbarch_${function}_p (current_gdbarch))\n"
 836             printf "#endif\n"
 837         fi
 838     fi
 839     if class_is_variable_p
 840     then
 841         printf "\n"
 842         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 843         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, ${returntype} ${function});\n"
 844         if test -n "${macro}"
 845         then
 846             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 847             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 848             printf "#endif\n"
 849             printf "#if !defined (${macro})\n"
 850             printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 851             printf "#endif\n"
 852         fi
 853     fi
 854     if class_is_function_p
 855     then
 856         printf "\n"
 857         if [ "x${formal}" = "xvoid" ] && class_is_multiarch_p
 858         then
 859             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch);\n"
 860         elif class_is_multiarch_p
 861         then
 862             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch, ${formal});\n"
 863         else
 864             printf "typedef ${returntype} (gdbarch_${function}_ftype) (${formal});\n"
 865         fi
 866         if [ "x${formal}" = "xvoid" ]
 867         then
 868           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 869         else
 870           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch, ${formal});\n"
 871         fi
 872         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, gdbarch_${function}_ftype *${function});\n"
 873         if test -n "${macro}"
 874         then
 875             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 876             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 877             printf "#endif\n"
 878             if [ "x${actual}" = "x" ]
 879             then
 880                 d="#define ${macro}() (gdbarch_${function} (current_gdbarch))"
 881             elif [ "x${actual}" = "x-" ]
 882             then
 883                 d="#define ${macro} (gdbarch_${function} (current_gdbarch))"
 884             else
 885                 d="#define ${macro}(${actual}) (gdbarch_${function} (current_gdbarch, ${actual}))"
 886             fi
 887             printf "#if !defined (${macro})\n"
 888             if [ "x${actual}" = "x" ]
 889             then
 890                 printf "#define ${macro}() (gdbarch_${function} (current_gdbarch))\n"
 891             elif [ "x${actual}" = "x-" ]
 892             then
 893                 printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 894             else
 895                 printf "#define ${macro}(${actual}) (gdbarch_${function} (current_gdbarch, ${actual}))\n"
 896             fi
 897             printf "#endif\n"
 898         fi
 899     fi
 900 done
 901
 902 # close it off
 903 cat <<EOF
 904
 905 extern struct gdbarch_tdep *gdbarch_tdep (struct gdbarch *gdbarch);
 906
 907
 908 /* Mechanism for co-ordinating the selection of a specific
 909    architecture.
 910
 911    GDB targets (*-tdep.c) can register an interest in a specific
 912    architecture.  Other GDB components can register a need to maintain
 913    per-architecture data.
 914
 915    The mechanisms below ensures that there is only a loose connection
 916    between the set-architecture command and the various GDB
 917    components.  Each component can independently register their need
 918    to maintain architecture specific data with gdbarch.
 919
 920    Pragmatics:
 921
 922    Previously, a single TARGET_ARCHITECTURE_HOOK was provided.  It
 923    didn't scale.
 924
 925    The more traditional mega-struct containing architecture specific
 926    data for all the various GDB components was also considered.  Since
 927    GDB is built from a variable number of (fairly independent)
 928    components it was determined that the global aproach was not
 929    applicable. */
 930
 931
 932 /* Register a new architectural family with GDB.
 933
 934    Register support for the specified ARCHITECTURE with GDB.  When
 935    gdbarch determines that the specified architecture has been
 936    selected, the corresponding INIT function is called.
 937
 938    --
 939
 940    The INIT function takes two parameters: INFO which contains the
 941    information available to gdbarch about the (possibly new)
 942    architecture; ARCHES which is a list of the previously created
 943    \`\`struct gdbarch'' for this architecture.
 944
 945    The INFO parameter is, as far as possible, be pre-initialized with
 946    information obtained from INFO.ABFD or the previously selected
 947    architecture.
 948
 949    The ARCHES parameter is a linked list (sorted most recently used)
 950    of all the previously created architures for this architecture
 951    family.  The (possibly NULL) ARCHES->gdbarch can used to access
 952    values from the previously selected architecture for this
 953    architecture family.  The global \`\`current_gdbarch'' shall not be
 954    used.
 955
 956    The INIT function shall return any of: NULL - indicating that it
 957    doesn't recognize the selected architecture; an existing \`\`struct
 958    gdbarch'' from the ARCHES list - indicating that the new
 959    architecture is just a synonym for an earlier architecture (see
 960    gdbarch_list_lookup_by_info()); a newly created \`\`struct gdbarch''
 961    - that describes the selected architecture (see gdbarch_alloc()).
 962
 963    The DUMP_TDEP function shall print out all target specific values.
 964    Care should be taken to ensure that the function works in both the
 965    multi-arch and non- multi-arch cases. */
 966
 967 struct gdbarch_list
 968 {
 969   struct gdbarch *gdbarch;
 970   struct gdbarch_list *next;
 971 };
 972
 973 struct gdbarch_info
 974 {
 975   /* Use default: NULL (ZERO). */
 976   const struct bfd_arch_info *bfd_arch_info;
 977
 978   /* Use default: BFD_ENDIAN_UNKNOWN (NB: is not ZERO).  */
 979   int byte_order;
 980
 981   /* Use default: NULL (ZERO). */
 982   bfd *abfd;
 983
 984   /* Use default: NULL (ZERO). */
 985   struct gdbarch_tdep_info *tdep_info;
 986
 987   /* Use default: GDB_OSABI_UNINITIALIZED (-1).  */
 988   enum gdb_osabi osabi;
 989 };
 990
 991 typedef struct gdbarch *(gdbarch_init_ftype) (struct gdbarch_info info, struct gdbarch_list *arches);
 992 typedef void (gdbarch_dump_tdep_ftype) (struct gdbarch *gdbarch, struct ui_file *file);
 993
 994 /* DEPRECATED - use gdbarch_register() */
 995 extern void register_gdbarch_init (enum bfd_architecture architecture, gdbarch_init_ftype *);
 996
 997 extern void gdbarch_register (enum bfd_architecture architecture,
 998                               gdbarch_init_ftype *,
 999                               gdbarch_dump_tdep_ftype *);
1000
1001
1002 /* Return a freshly allocated, NULL terminated, array of the valid
1003    architecture names.  Since architectures are registered during the
1004    _initialize phase this function only returns useful information
1005    once initialization has been completed. */
1006
1007 extern const char **gdbarch_printable_names (void);
1008
1009
1010 /* Helper function.  Search the list of ARCHES for a GDBARCH that
1011    matches the information provided by INFO. */
1012
1013 extern struct gdbarch_list *gdbarch_list_lookup_by_info (struct gdbarch_list *arches,  const struct gdbarch_info *info);
1014
1015
1016 /* Helper function.  Create a preliminary \`\`struct gdbarch''.  Perform
1017    basic initialization using values obtained from the INFO andTDEP
1018    parameters.  set_gdbarch_*() functions are called to complete the
1019    initialization of the object. */
1020
1021 extern struct gdbarch *gdbarch_alloc (const struct gdbarch_info *info, struct gdbarch_tdep *tdep);
1022
1023
1024 /* Helper function.  Free a partially-constructed \`\`struct gdbarch''.
1025    It is assumed that the caller freeds the \`\`struct
1026    gdbarch_tdep''. */
1027
1028 extern void gdbarch_free (struct gdbarch *);
1029
1030
1031 /* Helper function.  Allocate memory from the \`\`struct gdbarch''
1032    obstack.  The memory is freed when the corresponding architecture
1033    is also freed.  */
1034
1035 extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
1036 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
1037 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
1038
1039
1040 /* Helper function. Force an update of the current architecture.
1041
1042    The actual architecture selected is determined by INFO, \`\`(gdb) set
1043    architecture'' et.al., the existing architecture and BFD's default
1044    architecture.  INFO should be initialized to zero and then selected
1045    fields should be updated.
1046
1047    Returns non-zero if the update succeeds */
1048
1049 extern int gdbarch_update_p (struct gdbarch_info info);
1050
1051
1052 /* Helper function.  Find an architecture matching info.
1053
1054    INFO should be initialized using gdbarch_info_init, relevant fields
1055    set, and then finished using gdbarch_info_fill.
1056
1057    Returns the corresponding architecture, or NULL if no matching
1058    architecture was found.  "current_gdbarch" is not updated.  */
1059
1060 extern struct gdbarch *gdbarch_find_by_info (struct gdbarch_info info);
1061
1062
1063 /* Helper function.  Set the global "current_gdbarch" to "gdbarch".
1064
1065    FIXME: kettenis/20031124: Of the functions that follow, only
1066    gdbarch_from_bfd is supposed to survive.  The others will
1067    dissappear since in the future GDB will (hopefully) be truly
1068    multi-arch.  However, for now we're still stuck with the concept of
1069    a single active architecture.  */
1070
1071 extern void deprecated_current_gdbarch_select_hack (struct gdbarch *gdbarch);
1072
1073
1074 /* Register per-architecture data-pointer.
1075
1076    Reserve space for a per-architecture data-pointer.  An identifier
1077    for the reserved data-pointer is returned.  That identifer should
1078    be saved in a local static variable.
1079
1080    Memory for the per-architecture data shall be allocated using
1081    gdbarch_obstack_zalloc.  That memory will be deleted when the
1082    corresponding architecture object is deleted.
1083
1084    When a previously created architecture is re-selected, the
1085    per-architecture data-pointer for that previous architecture is
1086    restored.  INIT() is not re-called.
1087
1088    Multiple registrarants for any architecture are allowed (and
1089    strongly encouraged).  */
1090
1091 struct gdbarch_data;
1092
1093 typedef void *(gdbarch_data_pre_init_ftype) (struct obstack *obstack);
1094 extern struct gdbarch_data *gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *init);
1095 typedef void *(gdbarch_data_post_init_ftype) (struct gdbarch *gdbarch);
1096 extern struct gdbarch_data *gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *init);
1097 extern void deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1098                                          struct gdbarch_data *data,
1099                                          void *pointer);
1100
1101 extern void *gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *);
1102
1103
1104
1105 /* Register per-architecture memory region.
1106
1107    Provide a memory-region swap mechanism.  Per-architecture memory
1108    region are created.  These memory regions are swapped whenever the
1109    architecture is changed.  For a new architecture, the memory region
1110    is initialized with zero (0) and the INIT function is called.
1111
1112    Memory regions are swapped / initialized in the order that they are
1113    registered.  NULL DATA and/or INIT values can be specified.
1114
1115    New code should use gdbarch_data_register_*(). */
1116
1117 typedef void (gdbarch_swap_ftype) (void);
1118 extern void deprecated_register_gdbarch_swap (void *data, unsigned long size, gdbarch_swap_ftype *init);
1119 #define DEPRECATED_REGISTER_GDBARCH_SWAP(VAR) deprecated_register_gdbarch_swap (&(VAR), sizeof ((VAR)), NULL)
1120
1121
1122
1123 /* Set the dynamic target-system-dependent parameters (architecture,
1124    byte-order, ...) using information found in the BFD */
1125
1126 extern void set_gdbarch_from_file (bfd *);
1127
1128
1129 /* Initialize the current architecture to the "first" one we find on
1130    our list.  */
1131
1132 extern void initialize_current_architecture (void);
1133
1134 /* gdbarch trace variable */
1135 extern int gdbarch_debug;
1136
1137 extern void gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file);
1138
1139 #endif
1140 EOF
1141 exec 1>&2
1142 #../move-if-change new-gdbarch.h gdbarch.h
1143 compare_new gdbarch.h
1144
1145
1146 #
1147 # C file
1148 #
1149
1150 exec > new-gdbarch.c
1151 copyright
1152 cat <<EOF
1153
1154 #include "defs.h"
1155 #include "arch-utils.h"
1156
1157 #include "gdbcmd.h"
1158 #include "inferior.h" /* enum CALL_DUMMY_LOCATION et.al. */
1159 #include "symcat.h"
1160
1161 #include "floatformat.h"
1162
1163 #include "gdb_assert.h"
1164 #include "gdb_string.h"
1165 #include "gdb-events.h"
1166 #include "reggroups.h"
1167 #include "osabi.h"
1168 #include "gdb_obstack.h"
1169
1170 /* Static function declarations */
1171
1172 static void alloc_gdbarch_data (struct gdbarch *);
1173
1174 /* Non-zero if we want to trace architecture code.  */
1175
1176 #ifndef GDBARCH_DEBUG
1177 #define GDBARCH_DEBUG 0
1178 #endif
1179 int gdbarch_debug = GDBARCH_DEBUG;
1180 static void
1181 show_gdbarch_debug (struct ui_file *file, int from_tty,
1182                     struct cmd_list_element *c, const char *value)
1183 {
1184   fprintf_filtered (file, _("Architecture debugging is %s.\\n"), value);
1185 }
1186
1187 static const char *
1188 pformat (const struct floatformat *format)
1189 {
1190   if (format == NULL)
1191     return "(null)";
1192   else
1193     return  format->name;
1194 }
1195
1196 EOF
1197
1198 # gdbarch open the gdbarch object
1199 printf "\n"
1200 printf "/* Maintain the struct gdbarch object */\n"
1201 printf "\n"
1202 printf "struct gdbarch\n"
1203 printf "{\n"
1204 printf "  /* Has this architecture been fully initialized?  */\n"
1205 printf "  int initialized_p;\n"
1206 printf "\n"
1207 printf "  /* An obstack bound to the lifetime of the architecture.  */\n"
1208 printf "  struct obstack *obstack;\n"
1209 printf "\n"
1210 printf "  /* basic architectural information */\n"
1211 function_list | while do_read
1212 do
1213     if class_is_info_p
1214     then
1215         printf "  ${returntype} ${function};\n"
1216     fi
1217 done
1218 printf "\n"
1219 printf "  /* target specific vector. */\n"
1220 printf "  struct gdbarch_tdep *tdep;\n"
1221 printf "  gdbarch_dump_tdep_ftype *dump_tdep;\n"
1222 printf "\n"
1223 printf "  /* per-architecture data-pointers */\n"
1224 printf "  unsigned nr_data;\n"
1225 printf "  void **data;\n"
1226 printf "\n"
1227 printf "  /* per-architecture swap-regions */\n"
1228 printf "  struct gdbarch_swap *swap;\n"
1229 printf "\n"
1230 cat <<EOF
1231   /* Multi-arch values.
1232
1233      When extending this structure you must:
1234
1235      Add the field below.
1236
1237      Declare set/get functions and define the corresponding
1238      macro in gdbarch.h.
1239
1240      gdbarch_alloc(): If zero/NULL is not a suitable default,
1241      initialize the new field.
1242
1243      verify_gdbarch(): Confirm that the target updated the field
1244      correctly.
1245
1246      gdbarch_dump(): Add a fprintf_unfiltered call so that the new
1247      field is dumped out
1248
1249      \`\`startup_gdbarch()'': Append an initial value to the static
1250      variable (base values on the host's c-type system).
1251
1252      get_gdbarch(): Implement the set/get functions (probably using
1253      the macro's as shortcuts).
1254
1255      */
1256
1257 EOF
1258 function_list | while do_read
1259 do
1260     if class_is_variable_p
1261     then
1262         printf "  ${returntype} ${function};\n"
1263     elif class_is_function_p
1264     then
1265         printf "  gdbarch_${function}_ftype *${function};\n"
1266     fi
1267 done
1268 printf "};\n"
1269
1270 # A pre-initialized vector
1271 printf "\n"
1272 printf "\n"
1273 cat <<EOF
1274 /* The default architecture uses host values (for want of a better
1275    choice). */
1276 EOF
1277 printf "\n"
1278 printf "extern const struct bfd_arch_info bfd_default_arch_struct;\n"
1279 printf "\n"
1280 printf "struct gdbarch startup_gdbarch =\n"
1281 printf "{\n"
1282 printf "  1, /* Always initialized.  */\n"
1283 printf "  NULL, /* The obstack.  */\n"
1284 printf "  /* basic architecture information */\n"
1285 function_list | while do_read
1286 do
1287     if class_is_info_p
1288     then
1289         printf "  ${staticdefault},  /* ${function} */\n"
1290     fi
1291 done
1292 cat <<EOF
1293   /* target specific vector and its dump routine */
1294   NULL, NULL,
1295   /*per-architecture data-pointers and swap regions */
1296   0, NULL, NULL,
1297   /* Multi-arch values */
1298 EOF
1299 function_list | while do_read
1300 do
1301     if class_is_function_p || class_is_variable_p
1302     then
1303         printf "  ${staticdefault},  /* ${function} */\n"
1304     fi
1305 done
1306 cat <<EOF
1307   /* startup_gdbarch() */
1308 };
1309
1310 struct gdbarch *current_gdbarch = &startup_gdbarch;
1311 EOF
1312
1313 # Create a new gdbarch struct
1314 cat <<EOF
1315
1316 /* Create a new \`\`struct gdbarch'' based on information provided by
1317    \`\`struct gdbarch_info''. */
1318 EOF
1319 printf "\n"
1320 cat <<EOF
1321 struct gdbarch *
1322 gdbarch_alloc (const struct gdbarch_info *info,
1323                struct gdbarch_tdep *tdep)
1324 {
1325   /* NOTE: The new architecture variable is named \`\`current_gdbarch''
1326      so that macros such as TARGET_DOUBLE_BIT, when expanded, refer to
1327      the current local architecture and not the previous global
1328      architecture.  This ensures that the new architectures initial
1329      values are not influenced by the previous architecture.  Once
1330      everything is parameterised with gdbarch, this will go away.  */
1331   struct gdbarch *current_gdbarch;
1332
1333   /* Create an obstack for allocating all the per-architecture memory,
1334      then use that to allocate the architecture vector.  */
1335   struct obstack *obstack = XMALLOC (struct obstack);
1336   obstack_init (obstack);
1337   current_gdbarch = obstack_alloc (obstack, sizeof (*current_gdbarch));
1338   memset (current_gdbarch, 0, sizeof (*current_gdbarch));
1339   current_gdbarch->obstack = obstack;
1340
1341   alloc_gdbarch_data (current_gdbarch);
1342
1343   current_gdbarch->tdep = tdep;
1344 EOF
1345 printf "\n"
1346 function_list | while do_read
1347 do
1348     if class_is_info_p
1349     then
1350         printf "  current_gdbarch->${function} = info->${function};\n"
1351     fi
1352 done
1353 printf "\n"
1354 printf "  /* Force the explicit initialization of these. */\n"
1355 function_list | while do_read
1356 do
1357     if class_is_function_p || class_is_variable_p
1358     then
1359         if [ -n "${predefault}" -a "x${predefault}" != "x0" ]
1360         then
1361           printf "  current_gdbarch->${function} = ${predefault};\n"
1362         fi
1363     fi
1364 done
1365 cat <<EOF
1366   /* gdbarch_alloc() */
1367
1368   return current_gdbarch;
1369 }
1370 EOF
1371
1372 # Free a gdbarch struct.
1373 printf "\n"
1374 printf "\n"
1375 cat <<EOF
1376 /* Allocate extra space using the per-architecture obstack.  */
1377
1378 void *
1379 gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
1380 {
1381   void *data = obstack_alloc (arch->obstack, size);
1382   memset (data, 0, size);
1383   return data;
1384 }
1385
1386
1387 /* Free a gdbarch struct.  This should never happen in normal
1388    operation --- once you've created a gdbarch, you keep it around.
1389    However, if an architecture's init function encounters an error
1390    building the structure, it may need to clean up a partially
1391    constructed gdbarch.  */
1392
1393 void
1394 gdbarch_free (struct gdbarch *arch)
1395 {
1396   struct obstack *obstack;
1397   gdb_assert (arch != NULL);
1398   gdb_assert (!arch->initialized_p);
1399   obstack = arch->obstack;
1400   obstack_free (obstack, 0); /* Includes the ARCH.  */
1401   xfree (obstack);
1402 }
1403 EOF
1404
1405 # verify a new architecture
1406 cat <<EOF
1407
1408
1409 /* Ensure that all values in a GDBARCH are reasonable.  */
1410
1411 /* NOTE/WARNING: The parameter is called \`\`current_gdbarch'' so that it
1412    just happens to match the global variable \`\`current_gdbarch''.  That
1413    way macros refering to that variable get the local and not the global
1414    version - ulgh.  Once everything is parameterised with gdbarch, this
1415    will go away. */
1416
1417 static void
1418 verify_gdbarch (struct gdbarch *current_gdbarch)
1419 {
1420   struct ui_file *log;
1421   struct cleanup *cleanups;
1422   long dummy;
1423   char *buf;
1424   log = mem_fileopen ();
1425   cleanups = make_cleanup_ui_file_delete (log);
1426   /* fundamental */
1427   if (current_gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)
1428     fprintf_unfiltered (log, "\n\tbyte-order");
1429   if (current_gdbarch->bfd_arch_info == NULL)
1430     fprintf_unfiltered (log, "\n\tbfd_arch_info");
1431   /* Check those that need to be defined for the given multi-arch level. */
1432 EOF
1433 function_list | while do_read
1434 do
1435     if class_is_function_p || class_is_variable_p
1436     then
1437         if [ "x${invalid_p}" = "x0" ]
1438         then
1439             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1440         elif class_is_predicate_p
1441         then
1442             printf "  /* Skip verify of ${function}, has predicate */\n"
1443         # FIXME: See do_read for potential simplification
1444         elif [ -n "${invalid_p}" -a -n "${postdefault}" ]
1445         then
1446             printf "  if (${invalid_p})\n"
1447             printf "    current_gdbarch->${function} = ${postdefault};\n"
1448         elif [ -n "${predefault}" -a -n "${postdefault}" ]
1449         then
1450             printf "  if (current_gdbarch->${function} == ${predefault})\n"
1451             printf "    current_gdbarch->${function} = ${postdefault};\n"
1452         elif [ -n "${postdefault}" ]
1453         then
1454             printf "  if (current_gdbarch->${function} == 0)\n"
1455             printf "    current_gdbarch->${function} = ${postdefault};\n"
1456         elif [ -n "${invalid_p}" ]
1457         then
1458             printf "  if (${invalid_p})\n"
1459             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1460         elif [ -n "${predefault}" ]
1461         then
1462             printf "  if (current_gdbarch->${function} == ${predefault})\n"
1463             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1464         fi
1465     fi
1466 done
1467 cat <<EOF
1468   buf = ui_file_xstrdup (log, &dummy);
1469   make_cleanup (xfree, buf);
1470   if (strlen (buf) > 0)
1471     internal_error (__FILE__, __LINE__,
1472                     _("verify_gdbarch: the following are invalid ...%s"),
1473                     buf);
1474   do_cleanups (cleanups);
1475 }
1476 EOF
1477
1478 # dump the structure
1479 printf "\n"
1480 printf "\n"
1481 cat <<EOF
1482 /* Print out the details of the current architecture. */
1483
1484 /* NOTE/WARNING: The parameter is called \`\`current_gdbarch'' so that it
1485    just happens to match the global variable \`\`current_gdbarch''.  That
1486    way macros refering to that variable get the local and not the global
1487    version - ulgh.  Once everything is parameterised with gdbarch, this
1488    will go away. */
1489
1490 void
1491 gdbarch_dump (struct gdbarch *current_gdbarch, struct ui_file *file)
1492 {
1493   const char *gdb_xm_file = "<not-defined>";
1494   const char *gdb_nm_file = "<not-defined>";
1495   const char *gdb_tm_file = "<not-defined>";
1496 #if defined (GDB_XM_FILE)
1497   gdb_xm_file = GDB_XM_FILE;
1498 #endif
1499   fprintf_unfiltered (file,
1500                       "gdbarch_dump: GDB_XM_FILE = %s\\n",
1501                       gdb_xm_file);
1502 #if defined (GDB_NM_FILE)
1503   gdb_nm_file = GDB_NM_FILE;
1504 #endif
1505   fprintf_unfiltered (file,
1506                       "gdbarch_dump: GDB_NM_FILE = %s\\n",
1507                       gdb_nm_file);
1508 #if defined (GDB_TM_FILE)
1509   gdb_tm_file = GDB_TM_FILE;
1510 #endif
1511   fprintf_unfiltered (file,
1512                       "gdbarch_dump: GDB_TM_FILE = %s\\n",
1513                       gdb_tm_file);
1514 EOF
1515 function_list | sort -t: -k 4 | while do_read
1516 do
1517     # First the predicate
1518     if class_is_predicate_p
1519     then
1520         if test -n "${macro}"
1521         then
1522             printf "#ifdef ${macro}_P\n"
1523             printf "  fprintf_unfiltered (file,\n"
1524             printf "                      \"gdbarch_dump: %%s # %%s\\\\n\",\n"
1525             printf "                      \"${macro}_P()\",\n"
1526             printf "                      XSTRING (${macro}_P ()));\n"
1527             printf "#endif\n"
1528         fi
1529         printf "  fprintf_unfiltered (file,\n"
1530         printf "                      \"gdbarch_dump: gdbarch_${function}_p() = %%d\\\\n\",\n"
1531         printf "                      gdbarch_${function}_p (current_gdbarch));\n"
1532     fi
1533     # Print the macro definition.
1534     if test -n "${macro}"
1535     then
1536         printf "#ifdef ${macro}\n"
1537         if class_is_function_p
1538         then
1539             printf "  fprintf_unfiltered (file,\n"
1540             printf "                      \"gdbarch_dump: %%s # %%s\\\\n\",\n"
1541             printf "                      \"${macro}(${actual})\",\n"
1542             printf "                      XSTRING (${macro} (${actual})));\n"
1543         else
1544             printf "  fprintf_unfiltered (file,\n"
1545             printf "                      \"gdbarch_dump: ${macro} # %%s\\\\n\",\n"
1546             printf "                      XSTRING (${macro}));\n"
1547         fi
1548         printf "#endif\n"
1549     fi
1550     # Print the corresponding value.
1551     if class_is_function_p
1552     then
1553         printf "  fprintf_unfiltered (file,\n"
1554         printf "                      \"gdbarch_dump: ${function} = <0x%%lx>\\\\n\",\n"
1555         printf "                      (long) current_gdbarch->${function});\n"
1556     else
1557         # It is a variable
1558         case "${print}:${returntype}" in
1559             :CORE_ADDR )
1560                 fmt="0x%s"
1561                 print="paddr_nz (current_gdbarch->${function})"
1562                 ;;
1563             :* )
1564                 fmt="%s"
1565                 print="paddr_d (current_gdbarch->${function})"
1566                 ;;
1567             * )
1568                 fmt="%s"
1569                 ;;
1570         esac
1571         printf "  fprintf_unfiltered (file,\n"
1572         printf "                      \"gdbarch_dump: ${function} = %s\\\\n\",\n" "${fmt}"
1573         printf "                      ${print});\n"
1574     fi
1575 done
1576 cat <<EOF
1577   if (current_gdbarch->dump_tdep != NULL)
1578     current_gdbarch->dump_tdep (current_gdbarch, file);
1579 }
1580 EOF
1581
1582
1583 # GET/SET
1584 printf "\n"
1585 cat <<EOF
1586 struct gdbarch_tdep *
1587 gdbarch_tdep (struct gdbarch *gdbarch)
1588 {
1589   if (gdbarch_debug >= 2)
1590     fprintf_unfiltered (gdb_stdlog, "gdbarch_tdep called\\n");
1591   return gdbarch->tdep;
1592 }
1593 EOF
1594 printf "\n"
1595 function_list | while do_read
1596 do
1597     if class_is_predicate_p
1598     then
1599         printf "\n"
1600         printf "int\n"
1601         printf "gdbarch_${function}_p (struct gdbarch *gdbarch)\n"
1602         printf "{\n"
1603         printf "  gdb_assert (gdbarch != NULL);\n"
1604         printf "  return ${predicate};\n"
1605         printf "}\n"
1606     fi
1607     if class_is_function_p
1608     then
1609         printf "\n"
1610         printf "${returntype}\n"
1611         if [ "x${formal}" = "xvoid" ]
1612         then
1613           printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1614         else
1615           printf "gdbarch_${function} (struct gdbarch *gdbarch, ${formal})\n"
1616         fi
1617         printf "{\n"
1618         printf "  gdb_assert (gdbarch != NULL);\n"
1619         printf "  gdb_assert (gdbarch->${function} != NULL);\n"
1620         if class_is_predicate_p && test -n "${predefault}"
1621         then
1622             # Allow a call to a function with a predicate.
1623             printf "  /* Do not check predicate: ${predicate}, allow call.  */\n"
1624         fi
1625         printf "  if (gdbarch_debug >= 2)\n"
1626         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1627         if [ "x${actual}" = "x-" -o "x${actual}" = "x" ]
1628         then
1629             if class_is_multiarch_p
1630             then
1631                 params="gdbarch"
1632             else
1633                 params=""
1634             fi
1635         else
1636             if class_is_multiarch_p
1637             then
1638                 params="gdbarch, ${actual}"
1639             else
1640                 params="${actual}"
1641             fi
1642         fi
1643         if [ "x${returntype}" = "xvoid" ]
1644         then
1645           printf "  gdbarch->${function} (${params});\n"
1646         else
1647           printf "  return gdbarch->${function} (${params});\n"
1648         fi
1649         printf "}\n"
1650         printf "\n"
1651         printf "void\n"
1652         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1653         printf "            `echo ${function} | sed -e 's/./ /g'`  gdbarch_${function}_ftype ${function})\n"
1654         printf "{\n"
1655         printf "  gdbarch->${function} = ${function};\n"
1656         printf "}\n"
1657     elif class_is_variable_p
1658     then
1659         printf "\n"
1660         printf "${returntype}\n"
1661         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1662         printf "{\n"
1663         printf "  gdb_assert (gdbarch != NULL);\n"
1664         if [ "x${invalid_p}" = "x0" ]
1665         then
1666             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1667         elif [ -n "${invalid_p}" ]
1668         then
1669             printf "  /* Check variable is valid.  */\n"
1670             printf "  gdb_assert (!(${invalid_p}));\n"
1671         elif [ -n "${predefault}" ]
1672         then
1673             printf "  /* Check variable changed from pre-default.  */\n"
1674             printf "  gdb_assert (gdbarch->${function} != ${predefault});\n"
1675         fi
1676         printf "  if (gdbarch_debug >= 2)\n"
1677         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1678         printf "  return gdbarch->${function};\n"
1679         printf "}\n"
1680         printf "\n"
1681         printf "void\n"
1682         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1683         printf "            `echo ${function} | sed -e 's/./ /g'`  ${returntype} ${function})\n"
1684         printf "{\n"
1685         printf "  gdbarch->${function} = ${function};\n"
1686         printf "}\n"
1687     elif class_is_info_p
1688     then
1689         printf "\n"
1690         printf "${returntype}\n"
1691         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1692         printf "{\n"
1693         printf "  gdb_assert (gdbarch != NULL);\n"
1694         printf "  if (gdbarch_debug >= 2)\n"
1695         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1696         printf "  return gdbarch->${function};\n"
1697         printf "}\n"
1698     fi
1699 done
1700
1701 # All the trailing guff
1702 cat <<EOF
1703
1704
1705 /* Keep a registry of per-architecture data-pointers required by GDB
1706    modules. */
1707
1708 struct gdbarch_data
1709 {
1710   unsigned index;
1711   int init_p;
1712   gdbarch_data_pre_init_ftype *pre_init;
1713   gdbarch_data_post_init_ftype *post_init;
1714 };
1715
1716 struct gdbarch_data_registration
1717 {
1718   struct gdbarch_data *data;
1719   struct gdbarch_data_registration *next;
1720 };
1721
1722 struct gdbarch_data_registry
1723 {
1724   unsigned nr;
1725   struct gdbarch_data_registration *registrations;
1726 };
1727
1728 struct gdbarch_data_registry gdbarch_data_registry =
1729 {
1730   0, NULL,
1731 };
1732
1733 static struct gdbarch_data *
1734 gdbarch_data_register (gdbarch_data_pre_init_ftype *pre_init,
1735                        gdbarch_data_post_init_ftype *post_init)
1736 {
1737   struct gdbarch_data_registration **curr;
1738   /* Append the new registraration.  */
1739   for (curr = &gdbarch_data_registry.registrations;
1740        (*curr) != NULL;
1741        curr = &(*curr)->next);
1742   (*curr) = XMALLOC (struct gdbarch_data_registration);
1743   (*curr)->next = NULL;
1744   (*curr)->data = XMALLOC (struct gdbarch_data);
1745   (*curr)->data->index = gdbarch_data_registry.nr++;
1746   (*curr)->data->pre_init = pre_init;
1747   (*curr)->data->post_init = post_init;
1748   (*curr)->data->init_p = 1;
1749   return (*curr)->data;
1750 }
1751
1752 struct gdbarch_data *
1753 gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *pre_init)
1754 {
1755   return gdbarch_data_register (pre_init, NULL);
1756 }
1757
1758 struct gdbarch_data *
1759 gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *post_init)
1760 {
1761   return gdbarch_data_register (NULL, post_init);
1762 }
1763
1764 /* Create/delete the gdbarch data vector. */
1765
1766 static void
1767 alloc_gdbarch_data (struct gdbarch *gdbarch)
1768 {
1769   gdb_assert (gdbarch->data == NULL);
1770   gdbarch->nr_data = gdbarch_data_registry.nr;
1771   gdbarch->data = GDBARCH_OBSTACK_CALLOC (gdbarch, gdbarch->nr_data, void *);
1772 }
1773
1774 /* Initialize the current value of the specified per-architecture
1775    data-pointer. */
1776
1777 void
1778 deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1779                              struct gdbarch_data *data,
1780                              void *pointer)
1781 {
1782   gdb_assert (data->index < gdbarch->nr_data);
1783   gdb_assert (gdbarch->data[data->index] == NULL);
1784   gdb_assert (data->pre_init == NULL);
1785   gdbarch->data[data->index] = pointer;
1786 }
1787
1788 /* Return the current value of the specified per-architecture
1789    data-pointer. */
1790
1791 void *
1792 gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *data)
1793 {
1794   gdb_assert (data->index < gdbarch->nr_data);
1795   if (gdbarch->data[data->index] == NULL)
1796     {
1797       /* The data-pointer isn't initialized, call init() to get a
1798          value.  */
1799       if (data->pre_init != NULL)
1800         /* Mid architecture creation: pass just the obstack, and not
1801            the entire architecture, as that way it isn't possible for
1802            pre-init code to refer to undefined architecture
1803            fields.  */
1804         gdbarch->data[data->index] = data->pre_init (gdbarch->obstack);
1805       else if (gdbarch->initialized_p
1806                && data->post_init != NULL)
1807         /* Post architecture creation: pass the entire architecture
1808            (as all fields are valid), but be careful to also detect
1809            recursive references.  */
1810         {
1811           gdb_assert (data->init_p);
1812           data->init_p = 0;
1813           gdbarch->data[data->index] = data->post_init (gdbarch);
1814           data->init_p = 1;
1815         }
1816       else
1817         /* The architecture initialization hasn't completed - punt -
1818          hope that the caller knows what they are doing.  Once
1819          deprecated_set_gdbarch_data has been initialized, this can be
1820          changed to an internal error.  */
1821         return NULL;
1822       gdb_assert (gdbarch->data[data->index] != NULL);
1823     }
1824   return gdbarch->data[data->index];
1825 }
1826
1827
1828
1829 /* Keep a registry of swapped data required by GDB modules. */
1830
1831 struct gdbarch_swap
1832 {
1833   void *swap;
1834   struct gdbarch_swap_registration *source;
1835   struct gdbarch_swap *next;
1836 };
1837
1838 struct gdbarch_swap_registration
1839 {
1840   void *data;
1841   unsigned long sizeof_data;
1842   gdbarch_swap_ftype *init;
1843   struct gdbarch_swap_registration *next;
1844 };
1845
1846 struct gdbarch_swap_registry
1847 {
1848   int nr;
1849   struct gdbarch_swap_registration *registrations;
1850 };
1851
1852 struct gdbarch_swap_registry gdbarch_swap_registry =
1853 {
1854   0, NULL,
1855 };
1856
1857 void
1858 deprecated_register_gdbarch_swap (void *data,
1859                                   unsigned long sizeof_data,
1860                                   gdbarch_swap_ftype *init)
1861 {
1862   struct gdbarch_swap_registration **rego;
1863   for (rego = &gdbarch_swap_registry.registrations;
1864        (*rego) != NULL;
1865        rego = &(*rego)->next);
1866   (*rego) = XMALLOC (struct gdbarch_swap_registration);
1867   (*rego)->next = NULL;
1868   (*rego)->init = init;
1869   (*rego)->data = data;
1870   (*rego)->sizeof_data = sizeof_data;
1871 }
1872
1873 static void
1874 current_gdbarch_swap_init_hack (void)
1875 {
1876   struct gdbarch_swap_registration *rego;
1877   struct gdbarch_swap **curr = &current_gdbarch->swap;
1878   for (rego = gdbarch_swap_registry.registrations;
1879        rego != NULL;
1880        rego = rego->next)
1881     {
1882       if (rego->data != NULL)
1883         {
1884           (*curr) = GDBARCH_OBSTACK_ZALLOC (current_gdbarch,
1885                                             struct gdbarch_swap);
1886           (*curr)->source = rego;
1887           (*curr)->swap = gdbarch_obstack_zalloc (current_gdbarch,
1888                                                   rego->sizeof_data);
1889           (*curr)->next = NULL;
1890           curr = &(*curr)->next;
1891         }
1892       if (rego->init != NULL)
1893         rego->init ();
1894     }
1895 }
1896
1897 static struct gdbarch *
1898 current_gdbarch_swap_out_hack (void)
1899 {
1900   struct gdbarch *old_gdbarch = current_gdbarch;
1901   struct gdbarch_swap *curr;
1902
1903   gdb_assert (old_gdbarch != NULL);
1904   for (curr = old_gdbarch->swap;
1905        curr != NULL;
1906        curr = curr->next)
1907     {
1908       memcpy (curr->swap, curr->source->data, curr->source->sizeof_data);
1909       memset (curr->source->data, 0, curr->source->sizeof_data);
1910     }
1911   current_gdbarch = NULL;
1912   return old_gdbarch;
1913 }
1914
1915 static void
1916 current_gdbarch_swap_in_hack (struct gdbarch *new_gdbarch)
1917 {
1918   struct gdbarch_swap *curr;
1919
1920   gdb_assert (current_gdbarch == NULL);
1921   for (curr = new_gdbarch->swap;
1922        curr != NULL;
1923        curr = curr->next)
1924     memcpy (curr->source->data, curr->swap, curr->source->sizeof_data);
1925   current_gdbarch = new_gdbarch;
1926 }
1927
1928
1929 /* Keep a registry of the architectures known by GDB. */
1930
1931 struct gdbarch_registration
1932 {
1933   enum bfd_architecture bfd_architecture;
1934   gdbarch_init_ftype *init;
1935   gdbarch_dump_tdep_ftype *dump_tdep;
1936   struct gdbarch_list *arches;
1937   struct gdbarch_registration *next;
1938 };
1939
1940 static struct gdbarch_registration *gdbarch_registry = NULL;
1941
1942 static void
1943 append_name (const char ***buf, int *nr, const char *name)
1944 {
1945   *buf = xrealloc (*buf, sizeof (char**) * (*nr + 1));
1946   (*buf)[*nr] = name;
1947   *nr += 1;
1948 }
1949
1950 const char **
1951 gdbarch_printable_names (void)
1952 {
1953   /* Accumulate a list of names based on the registed list of
1954      architectures. */
1955   enum bfd_architecture a;
1956   int nr_arches = 0;
1957   const char **arches = NULL;
1958   struct gdbarch_registration *rego;
1959   for (rego = gdbarch_registry;
1960        rego != NULL;
1961        rego = rego->next)
1962     {
1963       const struct bfd_arch_info *ap;
1964       ap = bfd_lookup_arch (rego->bfd_architecture, 0);
1965       if (ap == NULL)
1966         internal_error (__FILE__, __LINE__,
1967                         _("gdbarch_architecture_names: multi-arch unknown"));
1968       do
1969         {
1970           append_name (&arches, &nr_arches, ap->printable_name);
1971           ap = ap->next;
1972         }
1973       while (ap != NULL);
1974     }
1975   append_name (&arches, &nr_arches, NULL);
1976   return arches;
1977 }
1978
1979
1980 void
1981 gdbarch_register (enum bfd_architecture bfd_architecture,
1982                   gdbarch_init_ftype *init,
1983                   gdbarch_dump_tdep_ftype *dump_tdep)
1984 {
1985   struct gdbarch_registration **curr;
1986   const struct bfd_arch_info *bfd_arch_info;
1987   /* Check that BFD recognizes this architecture */
1988   bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0);
1989   if (bfd_arch_info == NULL)
1990     {
1991       internal_error (__FILE__, __LINE__,
1992                       _("gdbarch: Attempt to register unknown architecture (%d)"),
1993                       bfd_architecture);
1994     }
1995   /* Check that we haven't seen this architecture before */
1996   for (curr = &gdbarch_registry;
1997        (*curr) != NULL;
1998        curr = &(*curr)->next)
1999     {
2000       if (bfd_architecture == (*curr)->bfd_architecture)
2001         internal_error (__FILE__, __LINE__,
2002                         _("gdbarch: Duplicate registraration of architecture (%s)"),
2003                         bfd_arch_info->printable_name);
2004     }
2005   /* log it */
2006   if (gdbarch_debug)
2007     fprintf_unfiltered (gdb_stdlog, "register_gdbarch_init (%s, 0x%08lx)\n",
2008                         bfd_arch_info->printable_name,
2009                         (long) init);
2010   /* Append it */
2011   (*curr) = XMALLOC (struct gdbarch_registration);
2012   (*curr)->bfd_architecture = bfd_architecture;
2013   (*curr)->init = init;
2014   (*curr)->dump_tdep = dump_tdep;
2015   (*curr)->arches = NULL;
2016   (*curr)->next = NULL;
2017 }
2018
2019 void
2020 register_gdbarch_init (enum bfd_architecture bfd_architecture,
2021                        gdbarch_init_ftype *init)
2022 {
2023   gdbarch_register (bfd_architecture, init, NULL);
2024 }
2025
2026
2027 /* Look for an architecture using gdbarch_info.  Base search on only
2028    BFD_ARCH_INFO and BYTE_ORDER. */
2029
2030 struct gdbarch_list *
2031 gdbarch_list_lookup_by_info (struct gdbarch_list *arches,
2032                              const struct gdbarch_info *info)
2033 {
2034   for (; arches != NULL; arches = arches->next)
2035     {
2036       if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info)
2037         continue;
2038       if (info->byte_order != arches->gdbarch->byte_order)
2039         continue;
2040       if (info->osabi != arches->gdbarch->osabi)
2041         continue;
2042       return arches;
2043     }
2044   return NULL;
2045 }
2046
2047
2048 /* Find an architecture that matches the specified INFO.  Create a new
2049    architecture if needed.  Return that new architecture.  Assumes
2050    that there is no current architecture.  */
2051
2052 static struct gdbarch *
2053 find_arch_by_info (struct gdbarch *old_gdbarch, struct gdbarch_info info)
2054 {
2055   struct gdbarch *new_gdbarch;
2056   struct gdbarch_registration *rego;
2057
2058   /* The existing architecture has been swapped out - all this code
2059      works from a clean slate.  */
2060   gdb_assert (current_gdbarch == NULL);
2061
2062   /* Fill in missing parts of the INFO struct using a number of
2063      sources: "set ..."; INFOabfd supplied; and the existing
2064      architecture.  */
2065   gdbarch_info_fill (old_gdbarch, &info);
2066
2067   /* Must have found some sort of architecture. */
2068   gdb_assert (info.bfd_arch_info != NULL);
2069
2070   if (gdbarch_debug)
2071     {
2072       fprintf_unfiltered (gdb_stdlog,
2073                           "find_arch_by_info: info.bfd_arch_info %s\n",
2074                           (info.bfd_arch_info != NULL
2075                            ? info.bfd_arch_info->printable_name
2076                            : "(null)"));
2077       fprintf_unfiltered (gdb_stdlog,
2078                           "find_arch_by_info: info.byte_order %d (%s)\n",
2079                           info.byte_order,
2080                           (info.byte_order == BFD_ENDIAN_BIG ? "big"
2081                            : info.byte_order == BFD_ENDIAN_LITTLE ? "little"
2082                            : "default"));
2083       fprintf_unfiltered (gdb_stdlog,
2084                           "find_arch_by_info: info.osabi %d (%s)\n",
2085                           info.osabi, gdbarch_osabi_name (info.osabi));
2086       fprintf_unfiltered (gdb_stdlog,
2087                           "find_arch_by_info: info.abfd 0x%lx\n",
2088                           (long) info.abfd);
2089       fprintf_unfiltered (gdb_stdlog,
2090                           "find_arch_by_info: info.tdep_info 0x%lx\n",
2091                           (long) info.tdep_info);
2092     }
2093
2094   /* Find the tdep code that knows about this architecture.  */
2095   for (rego = gdbarch_registry;
2096        rego != NULL;
2097        rego = rego->next)
2098     if (rego->bfd_architecture == info.bfd_arch_info->arch)
2099       break;
2100   if (rego == NULL)
2101     {
2102       if (gdbarch_debug)
2103         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2104                             "No matching architecture\n");
2105       return 0;
2106     }
2107
2108   /* Ask the tdep code for an architecture that matches "info".  */
2109   new_gdbarch = rego->init (info, rego->arches);
2110
2111   /* Did the tdep code like it?  No.  Reject the change and revert to
2112      the old architecture.  */
2113   if (new_gdbarch == NULL)
2114     {
2115       if (gdbarch_debug)
2116         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2117                             "Target rejected architecture\n");
2118       return NULL;
2119     }
2120
2121   /* Is this a pre-existing architecture (as determined by already
2122      being initialized)?  Move it to the front of the architecture
2123      list (keeping the list sorted Most Recently Used).  */
2124   if (new_gdbarch->initialized_p)
2125     {
2126       struct gdbarch_list **list;
2127       struct gdbarch_list *this;
2128       if (gdbarch_debug)
2129         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2130                             "Previous architecture 0x%08lx (%s) selected\n",
2131                             (long) new_gdbarch,
2132                             new_gdbarch->bfd_arch_info->printable_name);
2133       /* Find the existing arch in the list.  */
2134       for (list = &rego->arches;
2135            (*list) != NULL && (*list)->gdbarch != new_gdbarch;
2136            list = &(*list)->next);
2137       /* It had better be in the list of architectures.  */
2138       gdb_assert ((*list) != NULL && (*list)->gdbarch == new_gdbarch);
2139       /* Unlink THIS.  */
2140       this = (*list);
2141       (*list) = this->next;
2142       /* Insert THIS at the front.  */
2143       this->next = rego->arches;
2144       rego->arches = this;
2145       /* Return it.  */
2146       return new_gdbarch;
2147     }
2148
2149   /* It's a new architecture.  */
2150   if (gdbarch_debug)
2151     fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2152                         "New architecture 0x%08lx (%s) selected\n",
2153                         (long) new_gdbarch,
2154                         new_gdbarch->bfd_arch_info->printable_name);
2155
2156   /* Insert the new architecture into the front of the architecture
2157      list (keep the list sorted Most Recently Used).  */
2158   {
2159     struct gdbarch_list *this = XMALLOC (struct gdbarch_list);
2160     this->next = rego->arches;
2161     this->gdbarch = new_gdbarch;
2162     rego->arches = this;
2163   }
2164
2165   /* Check that the newly installed architecture is valid.  Plug in
2166      any post init values.  */
2167   new_gdbarch->dump_tdep = rego->dump_tdep;
2168   verify_gdbarch (new_gdbarch);
2169   new_gdbarch->initialized_p = 1;
2170
2171   /* Initialize any per-architecture swap areas.  This phase requires
2172      a valid global CURRENT_GDBARCH.  Set it momentarially, and then
2173      swap the entire architecture out.  */
2174   current_gdbarch = new_gdbarch;
2175   current_gdbarch_swap_init_hack ();
2176   current_gdbarch_swap_out_hack ();
2177
2178   if (gdbarch_debug)
2179     gdbarch_dump (new_gdbarch, gdb_stdlog);
2180
2181   return new_gdbarch;
2182 }
2183
2184 struct gdbarch *
2185 gdbarch_find_by_info (struct gdbarch_info info)
2186 {
2187   /* Save the previously selected architecture, setting the global to
2188      NULL.  This stops things like gdbarch->init() trying to use the
2189      previous architecture's configuration.  The previous architecture
2190      may not even be of the same architecture family.  The most recent
2191      architecture of the same family is found at the head of the
2192      rego->arches list.  */
2193   struct gdbarch *old_gdbarch = current_gdbarch_swap_out_hack ();
2194
2195   /* Find the specified architecture.  */
2196   struct gdbarch *new_gdbarch = find_arch_by_info (old_gdbarch, info);
2197
2198   /* Restore the existing architecture.  */
2199   gdb_assert (current_gdbarch == NULL);
2200   current_gdbarch_swap_in_hack (old_gdbarch);
2201
2202   return new_gdbarch;
2203 }
2204
2205 /* Make the specified architecture current, swapping the existing one
2206    out.  */
2207
2208 void
2209 deprecated_current_gdbarch_select_hack (struct gdbarch *new_gdbarch)
2210 {
2211   gdb_assert (new_gdbarch != NULL);
2212   gdb_assert (current_gdbarch != NULL);
2213   gdb_assert (new_gdbarch->initialized_p);
2214   current_gdbarch_swap_out_hack ();
2215   current_gdbarch_swap_in_hack (new_gdbarch);
2216   architecture_changed_event ();
2217   flush_cached_frames ();
2218 }
2219
2220 extern void _initialize_gdbarch (void);
2221
2222 void
2223 _initialize_gdbarch (void)
2224 {
2225   struct cmd_list_element *c;
2226
2227   add_setshow_zinteger_cmd ("arch", class_maintenance, &gdbarch_debug, _("\\
2228 Set architecture debugging."), _("\\
2229 Show architecture debugging."), _("\\
2230 When non-zero, architecture debugging is enabled."),
2231                             NULL,
2232                             show_gdbarch_debug,
2233                             &setdebuglist, &showdebuglist);
2234 }
2235 EOF
2236
2237 # close things off
2238 exec 1>&2
2239 #../move-if-change new-gdbarch.c gdbarch.c
2240 compare_new gdbarch.c