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, 2006, 2007,
   6 # 2008, 2009, 2010 Free 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 3 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, see <http://www.gnu.org/licenses/>.
  22
  23 # Make certain that the script is not running in an internationalized
  24 # environment.
  25 LANG=C ; export LANG
  26 LC_ALL=C ; export LC_ALL
  27
  28
  29 compare_new ()
  30 {
  31     file=$1
  32     if test ! -r ${file}
  33     then
  34         echo "${file} missing? cp new-${file} ${file}" 1>&2
  35     elif diff -u ${file} new-${file}
  36     then
  37         echo "${file} unchanged" 1>&2
  38     else
  39         echo "${file} has changed? cp new-${file} ${file}" 1>&2
  40     fi
  41 }
  42
  43
  44 # Format of the input table
  45 read="class returntype function formal actual staticdefault predefault postdefault invalid_p print garbage_at_eol"
  46
  47 do_read ()
  48 {
  49     comment=""
  50     class=""
  51     while read line
  52     do
  53         if test "${line}" = ""
  54         then
  55             continue
  56         elif test "${line}" = "#" -a "${comment}" = ""
  57         then
  58             continue
  59         elif expr "${line}" : "#" > /dev/null
  60         then
  61             comment="${comment}
  62 ${line}"
  63         else
  64
  65             # The semantics of IFS varies between different SH's.  Some
  66             # treat ``::' as three fields while some treat it as just too.
  67             # Work around this by eliminating ``::'' ....
  68             line="`echo "${line}" | sed -e 's/::/: :/g' -e 's/::/: :/g'`"
  69
  70             OFS="${IFS}" ; IFS="[:]"
  71             eval read ${read} <<EOF
  72 ${line}
  73 EOF
  74             IFS="${OFS}"
  75
  76             if test -n "${garbage_at_eol}"
  77             then
  78                 echo "Garbage at end-of-line in ${line}" 1>&2
  79                 kill $$
  80                 exit 1
  81             fi
  82
  83             # .... and then going back through each field and strip out those
  84             # that ended up with just that space character.
  85             for r in ${read}
  86             do
  87                 if eval test \"\${${r}}\" = \"\ \"
  88                 then
  89                     eval ${r}=""
  90                 fi
  91             done
  92
  93             case "${class}" in
  94                 m ) staticdefault="${predefault}" ;;
  95                 M ) staticdefault="0" ;;
  96                 * ) test "${staticdefault}" || staticdefault=0 ;;
  97             esac
  98
  99             case "${class}" in
 100             F | V | M )
 101                 case "${invalid_p}" in
 102                 "" )
 103                     if test -n "${predefault}"
 104                     then
 105                         #invalid_p="gdbarch->${function} == ${predefault}"
 106                         predicate="gdbarch->${function} != ${predefault}"
 107                     elif class_is_variable_p
 108                     then
 109                         predicate="gdbarch->${function} != 0"
 110                     elif class_is_function_p
 111                     then
 112                         predicate="gdbarch->${function} != NULL"
 113                     fi
 114                     ;;
 115                 * )
 116                     echo "Predicate function ${function} with invalid_p." 1>&2
 117                     kill $$
 118                     exit 1
 119                     ;;
 120                 esac
 121             esac
 122
 123             # PREDEFAULT is a valid fallback definition of MEMBER when
 124             # multi-arch is not enabled.  This ensures that the
 125             # default value, when multi-arch is the same as the
 126             # default value when not multi-arch.  POSTDEFAULT is
 127             # always a valid definition of MEMBER as this again
 128             # ensures consistency.
 129
 130             if [ -n "${postdefault}" ]
 131             then
 132                 fallbackdefault="${postdefault}"
 133             elif [ -n "${predefault}" ]
 134             then
 135                 fallbackdefault="${predefault}"
 136             else
 137                 fallbackdefault="0"
 138             fi
 139
 140             #NOT YET: See gdbarch.log for basic verification of
 141             # database
 142
 143             break
 144         fi
 145     done
 146     if [ -n "${class}" ]
 147     then
 148         true
 149     else
 150         false
 151     fi
 152 }
 153
 154
 155 fallback_default_p ()
 156 {
 157     [ -n "${postdefault}" -a "x${invalid_p}" != "x0" ] \
 158         || [ -n "${predefault}" -a "x${invalid_p}" = "x0" ]
 159 }
 160
 161 class_is_variable_p ()
 162 {
 163     case "${class}" in
 164         *v* | *V* ) true ;;
 165         * ) false ;;
 166     esac
 167 }
 168
 169 class_is_function_p ()
 170 {
 171     case "${class}" in
 172         *f* | *F* | *m* | *M* ) true ;;
 173         * ) false ;;
 174     esac
 175 }
 176
 177 class_is_multiarch_p ()
 178 {
 179     case "${class}" in
 180         *m* | *M* ) true ;;
 181         * ) false ;;
 182     esac
 183 }
 184
 185 class_is_predicate_p ()
 186 {
 187     case "${class}" in
 188         *F* | *V* | *M* ) true ;;
 189         * ) false ;;
 190     esac
 191 }
 192
 193 class_is_info_p ()
 194 {
 195     case "${class}" in
 196         *i* ) true ;;
 197         * ) false ;;
 198     esac
 199 }
 200
 201
 202 # dump out/verify the doco
 203 for field in ${read}
 204 do
 205   case ${field} in
 206
 207     class ) : ;;
 208
 209         # # -> line disable
 210         # f -> function
 211         #   hiding a function
 212         # F -> function + predicate
 213         #   hiding a function + predicate to test function validity
 214         # v -> variable
 215         #   hiding a variable
 216         # V -> variable + predicate
 217         #   hiding a variable + predicate to test variables validity
 218         # i -> set from info
 219         #   hiding something from the ``struct info'' object
 220         # m -> multi-arch function
 221         #   hiding a multi-arch function (parameterised with the architecture)
 222         # M -> multi-arch function + predicate
 223         #   hiding a multi-arch function + predicate to test function validity
 224
 225     returntype ) : ;;
 226
 227         # For functions, the return type; for variables, the data type
 228
 229     function ) : ;;
 230
 231         # For functions, the member function name; for variables, the
 232         # variable name.  Member function names are always prefixed with
 233         # ``gdbarch_'' for name-space purity.
 234
 235     formal ) : ;;
 236
 237         # The formal argument list.  It is assumed that the formal
 238         # argument list includes the actual name of each list element.
 239         # A function with no arguments shall have ``void'' as the
 240         # formal argument list.
 241
 242     actual ) : ;;
 243
 244         # The list of actual arguments.  The arguments specified shall
 245         # match the FORMAL list given above.  Functions with out
 246         # arguments leave this blank.
 247
 248     staticdefault ) : ;;
 249
 250         # To help with the GDB startup a static gdbarch object is
 251         # created.  STATICDEFAULT is the value to insert into that
 252         # static gdbarch object.  Since this a static object only
 253         # simple expressions can be used.
 254
 255         # If STATICDEFAULT is empty, zero is used.
 256
 257     predefault ) : ;;
 258
 259         # An initial value to assign to MEMBER of the freshly
 260         # malloc()ed gdbarch object.  After initialization, the
 261         # freshly malloc()ed object is passed to the target
 262         # architecture code for further updates.
 263
 264         # If PREDEFAULT is empty, zero is used.
 265
 266         # A non-empty PREDEFAULT, an empty POSTDEFAULT and a zero
 267         # INVALID_P are specified, PREDEFAULT will be used as the
 268         # default for the non- multi-arch target.
 269
 270         # A zero PREDEFAULT function will force the fallback to call
 271         # internal_error().
 272
 273         # Variable declarations can refer to ``gdbarch'' which will
 274         # contain the current architecture.  Care should be taken.
 275
 276     postdefault ) : ;;
 277
 278         # A value to assign to MEMBER of the new gdbarch object should
 279         # the target architecture code fail to change the PREDEFAULT
 280         # value.
 281
 282         # If POSTDEFAULT is empty, no post update is performed.
 283
 284         # If both INVALID_P and POSTDEFAULT are non-empty then
 285         # INVALID_P will be used to determine if MEMBER should be
 286         # changed to POSTDEFAULT.
 287
 288         # If a non-empty POSTDEFAULT and a zero INVALID_P are
 289         # specified, POSTDEFAULT will be used as the default for the
 290         # non- multi-arch target (regardless of the value of
 291         # PREDEFAULT).
 292
 293         # You cannot specify both a zero INVALID_P and a POSTDEFAULT.
 294
 295         # Variable declarations can refer to ``gdbarch'' which
 296         # will contain the current architecture.  Care should be
 297         # taken.
 298
 299     invalid_p ) : ;;
 300
 301         # A predicate equation that validates MEMBER.  Non-zero is
 302         # returned if the code creating the new architecture failed to
 303         # initialize MEMBER or the initialized the member is invalid.
 304         # If POSTDEFAULT is non-empty then MEMBER will be updated to
 305         # that value.  If POSTDEFAULT is empty then internal_error()
 306         # is called.
 307
 308         # If INVALID_P is empty, a check that MEMBER is no longer
 309         # equal to PREDEFAULT is used.
 310
 311         # The expression ``0'' disables the INVALID_P check making
 312         # PREDEFAULT a legitimate value.
 313
 314         # See also PREDEFAULT and POSTDEFAULT.
 315
 316     print ) : ;;
 317
 318         # An optional expression that convers MEMBER to a value
 319         # suitable for formatting using %s.
 320
 321         # If PRINT is empty, core_addr_to_string_nz (for CORE_ADDR)
 322         # or plongest (anything else) is used.
 323
 324     garbage_at_eol ) : ;;
 325
 326         # Catches stray fields.
 327
 328     *)
 329         echo "Bad field ${field}"
 330         exit 1;;
 331   esac
 332 done
 333
 334
 335 function_list ()
 336 {
 337   # See below (DOCO) for description of each field
 338   cat <<EOF
 339 i:const struct bfd_arch_info *:bfd_arch_info:::&bfd_default_arch_struct::::gdbarch_bfd_arch_info (gdbarch)->printable_name
 340 #
 341 i:int:byte_order:::BFD_ENDIAN_BIG
 342 i:int:byte_order_for_code:::BFD_ENDIAN_BIG
 343 #
 344 i:enum gdb_osabi:osabi:::GDB_OSABI_UNKNOWN
 345 #
 346 i:const struct target_desc *:target_desc:::::::host_address_to_string (gdbarch->target_desc)
 347
 348 # The bit byte-order has to do just with numbering of bits in debugging symbols
 349 # and such.  Conceptually, it's quite separate from byte/word byte order.
 350 v:int:bits_big_endian:::1:(gdbarch->byte_order == BFD_ENDIAN_BIG)::0
 351
 352 # Number of bits in a char or unsigned char for the target machine.
 353 # Just like CHAR_BIT in <limits.h> but describes the target machine.
 354 # v:TARGET_CHAR_BIT:int:char_bit::::8 * sizeof (char):8::0:
 355 #
 356 # Number of bits in a short or unsigned short for the target machine.
 357 v:int:short_bit:::8 * sizeof (short):2*TARGET_CHAR_BIT::0
 358 # Number of bits in an int or unsigned int for the target machine.
 359 v:int:int_bit:::8 * sizeof (int):4*TARGET_CHAR_BIT::0
 360 # Number of bits in a long or unsigned long for the target machine.
 361 v:int:long_bit:::8 * sizeof (long):4*TARGET_CHAR_BIT::0
 362 # Number of bits in a long long or unsigned long long for the target
 363 # machine.
 364 v:int:long_long_bit:::8 * sizeof (LONGEST):2*gdbarch->long_bit::0
 365
 366 # The ABI default bit-size and format for "float", "double", and "long
 367 # double".  These bit/format pairs should eventually be combined into
 368 # a single object.  For the moment, just initialize them as a pair.
 369 # Each format describes both the big and little endian layouts (if
 370 # useful).
 371
 372 v:int:float_bit:::8 * sizeof (float):4*TARGET_CHAR_BIT::0
 373 v:const struct floatformat **:float_format:::::floatformats_ieee_single::pformat (gdbarch->float_format)
 374 v:int:double_bit:::8 * sizeof (double):8*TARGET_CHAR_BIT::0
 375 v:const struct floatformat **:double_format:::::floatformats_ieee_double::pformat (gdbarch->double_format)
 376 v:int:long_double_bit:::8 * sizeof (long double):8*TARGET_CHAR_BIT::0
 377 v:const struct floatformat **:long_double_format:::::floatformats_ieee_double::pformat (gdbarch->long_double_format)
 378
 379 # For most targets, a pointer on the target and its representation as an
 380 # address in GDB have the same size and "look the same".  For such a
 381 # target, you need only set gdbarch_ptr_bit and gdbarch_addr_bit
 382 # / addr_bit will be set from it.
 383 #
 384 # If gdbarch_ptr_bit and gdbarch_addr_bit are different, you'll probably
 385 # also need to set gdbarch_pointer_to_address and gdbarch_address_to_pointer
 386 # as well.
 387 #
 388 # ptr_bit is the size of a pointer on the target
 389 v:int:ptr_bit:::8 * sizeof (void*):gdbarch->int_bit::0
 390 # addr_bit is the size of a target address as represented in gdb
 391 v:int:addr_bit:::8 * sizeof (void*):0:gdbarch_ptr_bit (gdbarch):
 392 #
 393 # One if \`char' acts like \`signed char', zero if \`unsigned char'.
 394 v:int:char_signed:::1:-1:1
 395 #
 396 F:CORE_ADDR:read_pc:struct regcache *regcache:regcache
 397 F:void:write_pc:struct regcache *regcache, CORE_ADDR val:regcache, val
 398 # Function for getting target's idea of a frame pointer.  FIXME: GDB's
 399 # whole scheme for dealing with "frames" and "frame pointers" needs a
 400 # serious shakedown.
 401 m:void:virtual_frame_pointer:CORE_ADDR pc, int *frame_regnum, LONGEST *frame_offset:pc, frame_regnum, frame_offset:0:legacy_virtual_frame_pointer::0
 402 #
 403 M:void:pseudo_register_read:struct regcache *regcache, int cookednum, gdb_byte *buf:regcache, cookednum, buf
 404 M:void:pseudo_register_write:struct regcache *regcache, int cookednum, const gdb_byte *buf:regcache, cookednum, buf
 405 #
 406 v:int:num_regs:::0:-1
 407 # This macro gives the number of pseudo-registers that live in the
 408 # register namespace but do not get fetched or stored on the target.
 409 # These pseudo-registers may be aliases for other registers,
 410 # combinations of other registers, or they may be computed by GDB.
 411 v:int:num_pseudo_regs:::0:0::0
 412
 413 # GDB's standard (or well known) register numbers.  These can map onto
 414 # a real register or a pseudo (computed) register or not be defined at
 415 # all (-1).
 416 # gdbarch_sp_regnum will hopefully be replaced by UNWIND_SP.
 417 v:int:sp_regnum:::-1:-1::0
 418 v:int:pc_regnum:::-1:-1::0
 419 v:int:ps_regnum:::-1:-1::0
 420 v:int:fp0_regnum:::0:-1::0
 421 # Convert stab register number (from \`r\' declaration) to a gdb REGNUM.
 422 m:int:stab_reg_to_regnum:int stab_regnr:stab_regnr::no_op_reg_to_regnum::0
 423 # Provide a default mapping from a ecoff register number to a gdb REGNUM.
 424 m:int:ecoff_reg_to_regnum:int ecoff_regnr:ecoff_regnr::no_op_reg_to_regnum::0
 425 # Convert from an sdb register number to an internal gdb register number.
 426 m:int:sdb_reg_to_regnum:int sdb_regnr:sdb_regnr::no_op_reg_to_regnum::0
 427 # Provide a default mapping from a DWARF2 register number to a gdb REGNUM.
 428 m:int:dwarf2_reg_to_regnum:int dwarf2_regnr:dwarf2_regnr::no_op_reg_to_regnum::0
 429 m:const char *:register_name:int regnr:regnr::0
 430
 431 # Return the type of a register specified by the architecture.  Only
 432 # the register cache should call this function directly; others should
 433 # use "register_type".
 434 M:struct type *:register_type:int reg_nr:reg_nr
 435
 436 # See gdbint.texinfo, and PUSH_DUMMY_CALL.
 437 M:struct frame_id:dummy_id:struct frame_info *this_frame:this_frame
 438 # Implement DUMMY_ID and PUSH_DUMMY_CALL, then delete
 439 # deprecated_fp_regnum.
 440 v:int:deprecated_fp_regnum:::-1:-1::0
 441
 442 # See gdbint.texinfo.  See infcall.c.
 443 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
 444 v:int:call_dummy_location::::AT_ENTRY_POINT::0
 445 M:CORE_ADDR:push_dummy_code:CORE_ADDR sp, CORE_ADDR funaddr, struct value **args, int nargs, struct type *value_type, CORE_ADDR *real_pc, CORE_ADDR *bp_addr, struct regcache *regcache:sp, funaddr, args, nargs, value_type, real_pc, bp_addr, regcache
 446
 447 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
 448 M:void:print_float_info:struct ui_file *file, struct frame_info *frame, const char *args:file, frame, args
 449 M:void:print_vector_info:struct ui_file *file, struct frame_info *frame, const char *args:file, frame, args
 450 # MAP a GDB RAW register number onto a simulator register number.  See
 451 # also include/...-sim.h.
 452 m:int:register_sim_regno:int reg_nr:reg_nr::legacy_register_sim_regno::0
 453 m:int:cannot_fetch_register:int regnum:regnum::cannot_register_not::0
 454 m:int:cannot_store_register:int regnum:regnum::cannot_register_not::0
 455 # setjmp/longjmp support.
 456 F:int:get_longjmp_target:struct frame_info *frame, CORE_ADDR *pc:frame, pc
 457 #
 458 v:int:believe_pcc_promotion:::::::
 459 #
 460 m:int:convert_register_p:int regnum, struct type *type:regnum, type:0:generic_convert_register_p::0
 461 f:void:register_to_value:struct frame_info *frame, int regnum, struct type *type, gdb_byte *buf:frame, regnum, type, buf:0
 462 f:void:value_to_register:struct frame_info *frame, int regnum, struct type *type, const gdb_byte *buf:frame, regnum, type, buf:0
 463 # Construct a value representing the contents of register REGNUM in
 464 # frame FRAME, interpreted as type TYPE.  The routine needs to
 465 # allocate and return a struct value with all value attributes
 466 # (but not the value contents) filled in.
 467 f:struct value *:value_from_register:struct type *type, int regnum, struct frame_info *frame:type, regnum, frame::default_value_from_register::0
 468 #
 469 m:CORE_ADDR:pointer_to_address:struct type *type, const gdb_byte *buf:type, buf::unsigned_pointer_to_address::0
 470 m:void:address_to_pointer:struct type *type, gdb_byte *buf, CORE_ADDR addr:type, buf, addr::unsigned_address_to_pointer::0
 471 M:CORE_ADDR:integer_to_address:struct type *type, const gdb_byte *buf:type, buf
 472
 473 # Return the return-value convention that will be used by FUNCTYPE
 474 # to return a value of type VALTYPE.  FUNCTYPE may be NULL in which
 475 # case the return convention is computed based only on VALTYPE.
 476 #
 477 # If READBUF is not NULL, extract the return value and save it in this buffer.
 478 #
 479 # If WRITEBUF is not NULL, it contains a return value which will be
 480 # stored into the appropriate register.  This can be used when we want
 481 # to force the value returned by a function (see the "return" command
 482 # for instance).
 483 M:enum return_value_convention:return_value:struct type *functype, struct type *valtype, struct regcache *regcache, gdb_byte *readbuf, const gdb_byte *writebuf:functype, valtype, regcache, readbuf, writebuf
 484
 485 m:CORE_ADDR:skip_prologue:CORE_ADDR ip:ip:0:0
 486 M:CORE_ADDR:skip_main_prologue:CORE_ADDR ip:ip
 487 f:int:inner_than:CORE_ADDR lhs, CORE_ADDR rhs:lhs, rhs:0:0
 488 m:const gdb_byte *:breakpoint_from_pc:CORE_ADDR *pcptr, int *lenptr:pcptr, lenptr::0:
 489 # Return the adjusted address and kind to use for Z0/Z1 packets.
 490 # KIND is usually the memory length of the breakpoint, but may have a
 491 # different target-specific meaning.
 492 m:void:remote_breakpoint_from_pc:CORE_ADDR *pcptr, int *kindptr:pcptr, kindptr:0:default_remote_breakpoint_from_pc::0
 493 M:CORE_ADDR:adjust_breakpoint_address:CORE_ADDR bpaddr:bpaddr
 494 m:int:memory_insert_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_insert_breakpoint::0
 495 m:int:memory_remove_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_remove_breakpoint::0
 496 v:CORE_ADDR:decr_pc_after_break:::0:::0
 497
 498 # A function can be addressed by either it's "pointer" (possibly a
 499 # descriptor address) or "entry point" (first executable instruction).
 500 # The method "convert_from_func_ptr_addr" converting the former to the
 501 # latter.  gdbarch_deprecated_function_start_offset is being used to implement
 502 # a simplified subset of that functionality - the function's address
 503 # corresponds to the "function pointer" and the function's start
 504 # corresponds to the "function entry point" - and hence is redundant.
 505
 506 v:CORE_ADDR:deprecated_function_start_offset:::0:::0
 507
 508 # Return the remote protocol register number associated with this
 509 # register.  Normally the identity mapping.
 510 m:int:remote_register_number:int regno:regno::default_remote_register_number::0
 511
 512 # Fetch the target specific address used to represent a load module.
 513 F:CORE_ADDR:fetch_tls_load_module_address:struct objfile *objfile:objfile
 514 #
 515 v:CORE_ADDR:frame_args_skip:::0:::0
 516 M:CORE_ADDR:unwind_pc:struct frame_info *next_frame:next_frame
 517 M:CORE_ADDR:unwind_sp:struct frame_info *next_frame:next_frame
 518 # DEPRECATED_FRAME_LOCALS_ADDRESS as been replaced by the per-frame
 519 # frame-base.  Enable frame-base before frame-unwind.
 520 F:int:frame_num_args:struct frame_info *frame:frame
 521 #
 522 M:CORE_ADDR:frame_align:CORE_ADDR address:address
 523 m:int:stabs_argument_has_addr:struct type *type:type::default_stabs_argument_has_addr::0
 524 v:int:frame_red_zone_size
 525 #
 526 m:CORE_ADDR:convert_from_func_ptr_addr:CORE_ADDR addr, struct target_ops *targ:addr, targ::convert_from_func_ptr_addr_identity::0
 527 # On some machines there are bits in addresses which are not really
 528 # part of the address, but are used by the kernel, the hardware, etc.
 529 # for special purposes.  gdbarch_addr_bits_remove takes out any such bits so
 530 # we get a "real" address such as one would find in a symbol table.
 531 # This is used only for addresses of instructions, and even then I'm
 532 # not sure it's used in all contexts.  It exists to deal with there
 533 # being a few stray bits in the PC which would mislead us, not as some
 534 # sort of generic thing to handle alignment or segmentation (it's
 535 # possible it should be in TARGET_READ_PC instead).
 536 m:CORE_ADDR:addr_bits_remove:CORE_ADDR addr:addr::core_addr_identity::0
 537 # It is not at all clear why gdbarch_smash_text_address is not folded into
 538 # gdbarch_addr_bits_remove.
 539 m:CORE_ADDR:smash_text_address:CORE_ADDR addr:addr::core_addr_identity::0
 540
 541 # FIXME/cagney/2001-01-18: This should be split in two.  A target method that
 542 # indicates if the target needs software single step.  An ISA method to
 543 # implement it.
 544 #
 545 # FIXME/cagney/2001-01-18: This should be replaced with something that inserts
 546 # breakpoints using the breakpoint system instead of blatting memory directly
 547 # (as with rs6000).
 548 #
 549 # FIXME/cagney/2001-01-18: The logic is backwards.  It should be asking if the
 550 # target can single step.  If not, then implement single step using breakpoints.
 551 #
 552 # A return value of 1 means that the software_single_step breakpoints
 553 # were inserted; 0 means they were not.
 554 F:int:software_single_step:struct frame_info *frame:frame
 555
 556 # Return non-zero if the processor is executing a delay slot and a
 557 # further single-step is needed before the instruction finishes.
 558 M:int:single_step_through_delay:struct frame_info *frame:frame
 559 # FIXME: cagney/2003-08-28: Need to find a better way of selecting the
 560 # disassembler.  Perhaps objdump can handle it?
 561 f:int:print_insn:bfd_vma vma, struct disassemble_info *info:vma, info::0:
 562 f:CORE_ADDR:skip_trampoline_code:struct frame_info *frame, CORE_ADDR pc:frame, pc::generic_skip_trampoline_code::0
 563
 564
 565 # If in_solib_dynsym_resolve_code() returns true, and SKIP_SOLIB_RESOLVER
 566 # evaluates non-zero, this is the address where the debugger will place
 567 # a step-resume breakpoint to get us past the dynamic linker.
 568 m:CORE_ADDR:skip_solib_resolver:CORE_ADDR pc:pc::generic_skip_solib_resolver::0
 569 # Some systems also have trampoline code for returning from shared libs.
 570 m:int:in_solib_return_trampoline:CORE_ADDR pc, char *name:pc, name::generic_in_solib_return_trampoline::0
 571
 572 # A target might have problems with watchpoints as soon as the stack
 573 # frame of the current function has been destroyed.  This mostly happens
 574 # as the first action in a funtion's epilogue.  in_function_epilogue_p()
 575 # is defined to return a non-zero value if either the given addr is one
 576 # instruction after the stack destroying instruction up to the trailing
 577 # return instruction or if we can figure out that the stack frame has
 578 # already been invalidated regardless of the value of addr.  Targets
 579 # which don't suffer from that problem could just let this functionality
 580 # untouched.
 581 m:int:in_function_epilogue_p:CORE_ADDR addr:addr:0:generic_in_function_epilogue_p::0
 582 f:void:elf_make_msymbol_special:asymbol *sym, struct minimal_symbol *msym:sym, msym::default_elf_make_msymbol_special::0
 583 f:void:coff_make_msymbol_special:int val, struct minimal_symbol *msym:val, msym::default_coff_make_msymbol_special::0
 584 v:int:cannot_step_breakpoint:::0:0::0
 585 v:int:have_nonsteppable_watchpoint:::0:0::0
 586 F:int:address_class_type_flags:int byte_size, int dwarf2_addr_class:byte_size, dwarf2_addr_class
 587 M:const char *:address_class_type_flags_to_name:int type_flags:type_flags
 588 M:int:address_class_name_to_type_flags:const char *name, int *type_flags_ptr:name, type_flags_ptr
 589 # Is a register in a group
 590 m:int:register_reggroup_p:int regnum, struct reggroup *reggroup:regnum, reggroup::default_register_reggroup_p::0
 591 # Fetch the pointer to the ith function argument.
 592 F:CORE_ADDR:fetch_pointer_argument:struct frame_info *frame, int argi, struct type *type:frame, argi, type
 593
 594 # Return the appropriate register set for a core file section with
 595 # name SECT_NAME and size SECT_SIZE.
 596 M:const struct regset *:regset_from_core_section:const char *sect_name, size_t sect_size:sect_name, sect_size
 597
 598 # When creating core dumps, some systems encode the PID in addition
 599 # to the LWP id in core file register section names.  In those cases, the
 600 # "XXX" in ".reg/XXX" is encoded as [LWPID << 16 | PID].  This setting
 601 # is set to true for such architectures; false if "XXX" represents an LWP
 602 # or thread id with no special encoding.
 603 v:int:core_reg_section_encodes_pid:::0:0::0
 604
 605 # Supported register notes in a core file.
 606 v:struct core_regset_section *:core_regset_sections:const char *name, int len::::::host_address_to_string (gdbarch->core_regset_sections)
 607
 608 # Read offset OFFSET of TARGET_OBJECT_LIBRARIES formatted shared libraries list from
 609 # core file into buffer READBUF with length LEN.
 610 M:LONGEST:core_xfer_shared_libraries:gdb_byte *readbuf, ULONGEST offset, LONGEST len:readbuf, offset, len
 611
 612 # How the core_stratum layer converts a PTID from a core file to a
 613 # string.
 614 M:char *:core_pid_to_str:ptid_t ptid:ptid
 615
 616 # BFD target to use when generating a core file.
 617 V:const char *:gcore_bfd_target:::0:0:::gdbarch->gcore_bfd_target
 618
 619 # If the elements of C++ vtables are in-place function descriptors rather
 620 # than normal function pointers (which may point to code or a descriptor),
 621 # set this to one.
 622 v:int:vtable_function_descriptors:::0:0::0
 623
 624 # Set if the least significant bit of the delta is used instead of the least
 625 # significant bit of the pfn for pointers to virtual member functions.
 626 v:int:vbit_in_delta:::0:0::0
 627
 628 # Advance PC to next instruction in order to skip a permanent breakpoint.
 629 F:void:skip_permanent_breakpoint:struct regcache *regcache:regcache
 630
 631 # The maximum length of an instruction on this architecture.
 632 V:ULONGEST:max_insn_length:::0:0
 633
 634 # Copy the instruction at FROM to TO, and make any adjustments
 635 # necessary to single-step it at that address.
 636 #
 637 # REGS holds the state the thread's registers will have before
 638 # executing the copied instruction; the PC in REGS will refer to FROM,
 639 # not the copy at TO.  The caller should update it to point at TO later.
 640 #
 641 # Return a pointer to data of the architecture's choice to be passed
 642 # to gdbarch_displaced_step_fixup.  Or, return NULL to indicate that
 643 # the instruction's effects have been completely simulated, with the
 644 # resulting state written back to REGS.
 645 #
 646 # For a general explanation of displaced stepping and how GDB uses it,
 647 # see the comments in infrun.c.
 648 #
 649 # The TO area is only guaranteed to have space for
 650 # gdbarch_max_insn_length (arch) bytes, so this function must not
 651 # write more bytes than that to that area.
 652 #
 653 # If you do not provide this function, GDB assumes that the
 654 # architecture does not support displaced stepping.
 655 #
 656 # If your architecture doesn't need to adjust instructions before
 657 # single-stepping them, consider using simple_displaced_step_copy_insn
 658 # here.
 659 M:struct displaced_step_closure *:displaced_step_copy_insn:CORE_ADDR from, CORE_ADDR to, struct regcache *regs:from, to, regs
 660
 661 # Return true if GDB should use hardware single-stepping to execute
 662 # the displaced instruction identified by CLOSURE.  If false,
 663 # GDB will simply restart execution at the displaced instruction
 664 # location, and it is up to the target to ensure GDB will receive
 665 # control again (e.g. by placing a software breakpoint instruction
 666 # into the displaced instruction buffer).
 667 #
 668 # The default implementation returns false on all targets that
 669 # provide a gdbarch_software_single_step routine, and true otherwise.
 670 m:int:displaced_step_hw_singlestep:struct displaced_step_closure *closure:closure::default_displaced_step_hw_singlestep::0
 671
 672 # Fix up the state resulting from successfully single-stepping a
 673 # displaced instruction, to give the result we would have gotten from
 674 # stepping the instruction in its original location.
 675 #
 676 # REGS is the register state resulting from single-stepping the
 677 # displaced instruction.
 678 #
 679 # CLOSURE is the result from the matching call to
 680 # gdbarch_displaced_step_copy_insn.
 681 #
 682 # If you provide gdbarch_displaced_step_copy_insn.but not this
 683 # function, then GDB assumes that no fixup is needed after
 684 # single-stepping the instruction.
 685 #
 686 # For a general explanation of displaced stepping and how GDB uses it,
 687 # see the comments in infrun.c.
 688 M:void:displaced_step_fixup:struct displaced_step_closure *closure, CORE_ADDR from, CORE_ADDR to, struct regcache *regs:closure, from, to, regs::NULL
 689
 690 # Free a closure returned by gdbarch_displaced_step_copy_insn.
 691 #
 692 # If you provide gdbarch_displaced_step_copy_insn, you must provide
 693 # this function as well.
 694 #
 695 # If your architecture uses closures that don't need to be freed, then
 696 # you can use simple_displaced_step_free_closure here.
 697 #
 698 # For a general explanation of displaced stepping and how GDB uses it,
 699 # see the comments in infrun.c.
 700 m:void:displaced_step_free_closure:struct displaced_step_closure *closure:closure::NULL::(! gdbarch->displaced_step_free_closure) != (! gdbarch->displaced_step_copy_insn)
 701
 702 # Return the address of an appropriate place to put displaced
 703 # instructions while we step over them.  There need only be one such
 704 # place, since we're only stepping one thread over a breakpoint at a
 705 # time.
 706 #
 707 # For a general explanation of displaced stepping and how GDB uses it,
 708 # see the comments in infrun.c.
 709 m:CORE_ADDR:displaced_step_location:void:::NULL::(! gdbarch->displaced_step_location) != (! gdbarch->displaced_step_copy_insn)
 710
 711 # Refresh overlay mapped state for section OSECT.
 712 F:void:overlay_update:struct obj_section *osect:osect
 713
 714 M:const struct target_desc *:core_read_description:struct target_ops *target, bfd *abfd:target, abfd
 715
 716 # Handle special encoding of static variables in stabs debug info.
 717 F:char *:static_transform_name:char *name:name
 718 # Set if the address in N_SO or N_FUN stabs may be zero.
 719 v:int:sofun_address_maybe_missing:::0:0::0
 720
 721 # Parse the instruction at ADDR storing in the record execution log
 722 # the registers REGCACHE and memory ranges that will be affected when
 723 # the instruction executes, along with their current values.
 724 # Return -1 if something goes wrong, 0 otherwise.
 725 M:int:process_record:struct regcache *regcache, CORE_ADDR addr:regcache, addr
 726
 727 # Save process state after a signal.
 728 # Return -1 if something goes wrong, 0 otherwise.
 729 M:int:process_record_signal:struct regcache *regcache, enum target_signal signal:regcache, signal
 730
 731 # Signal translation: translate inferior's signal (host's) number into
 732 # GDB's representation.
 733 m:enum target_signal:target_signal_from_host:int signo:signo::default_target_signal_from_host::0
 734 # Signal translation: translate GDB's signal number into inferior's host
 735 # signal number.
 736 m:int:target_signal_to_host:enum target_signal ts:ts::default_target_signal_to_host::0
 737
 738 # Extra signal info inspection.
 739 #
 740 # Return a type suitable to inspect extra signal information.
 741 M:struct type *:get_siginfo_type:void:
 742
 743 # Record architecture-specific information from the symbol table.
 744 M:void:record_special_symbol:struct objfile *objfile, asymbol *sym:objfile, sym
 745
 746 # Function for the 'catch syscall' feature.
 747
 748 # Get architecture-specific system calls information from registers.
 749 M:LONGEST:get_syscall_number:ptid_t ptid:ptid
 750
 751 # True if the list of shared libraries is one and only for all
 752 # processes, as opposed to a list of shared libraries per inferior.
 753 # This usually means that all processes, although may or may not share
 754 # an address space, will see the same set of symbols at the same
 755 # addresses.
 756 v:int:has_global_solist:::0:0::0
 757
 758 # On some targets, even though each inferior has its own private
 759 # address space, the debug interface takes care of making breakpoints
 760 # visible to all address spaces automatically.  For such cases,
 761 # this property should be set to true.
 762 v:int:has_global_breakpoints:::0:0::0
 763
 764 # True if inferiors share an address space (e.g., uClinux).
 765 m:int:has_shared_address_space:void:::default_has_shared_address_space::0
 766
 767 # True if a fast tracepoint can be set at an address.
 768 m:int:fast_tracepoint_valid_at:CORE_ADDR addr, int *isize, char **msg:addr, isize, msg::default_fast_tracepoint_valid_at::0
 769
 770 # Not NULL if a target has additonal field for qSupported.
 771 v:const char *:qsupported:::0:0::0:gdbarch->qsupported
 772 EOF
 773 }
 774
 775 #
 776 # The .log file
 777 #
 778 exec > new-gdbarch.log
 779 function_list | while do_read
 780 do
 781     cat <<EOF
 782 ${class} ${returntype} ${function} ($formal)
 783 EOF
 784     for r in ${read}
 785     do
 786         eval echo \"\ \ \ \ ${r}=\${${r}}\"
 787     done
 788     if class_is_predicate_p && fallback_default_p
 789     then
 790         echo "Error: predicate function ${function} can not have a non- multi-arch default" 1>&2
 791         kill $$
 792         exit 1
 793     fi
 794     if [ "x${invalid_p}" = "x0" -a -n "${postdefault}" ]
 795     then
 796         echo "Error: postdefault is useless when invalid_p=0" 1>&2
 797         kill $$
 798         exit 1
 799     fi
 800     if class_is_multiarch_p
 801     then
 802         if class_is_predicate_p ; then :
 803         elif test "x${predefault}" = "x"
 804         then
 805             echo "Error: pure multi-arch function ${function} must have a predefault" 1>&2
 806             kill $$
 807             exit 1
 808         fi
 809     fi
 810     echo ""
 811 done
 812
 813 exec 1>&2
 814 compare_new gdbarch.log
 815
 816
 817 copyright ()
 818 {
 819 cat <<EOF
 820 /* *INDENT-OFF* */ /* THIS FILE IS GENERATED */
 821
 822 /* Dynamic architecture support for GDB, the GNU debugger.
 823
 824    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
 825    2007, 2008, 2009 Free Software Foundation, Inc.
 826
 827    This file is part of GDB.
 828
 829    This program is free software; you can redistribute it and/or modify
 830    it under the terms of the GNU General Public License as published by
 831    the Free Software Foundation; either version 3 of the License, or
 832    (at your option) any later version.
 833
 834    This program is distributed in the hope that it will be useful,
 835    but WITHOUT ANY WARRANTY; without even the implied warranty of
 836    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 837    GNU General Public License for more details.
 838
 839    You should have received a copy of the GNU General Public License
 840    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 841
 842 /* This file was created with the aid of \`\`gdbarch.sh''.
 843
 844    The Bourne shell script \`\`gdbarch.sh'' creates the files
 845    \`\`new-gdbarch.c'' and \`\`new-gdbarch.h and then compares them
 846    against the existing \`\`gdbarch.[hc]''.  Any differences found
 847    being reported.
 848
 849    If editing this file, please also run gdbarch.sh and merge any
 850    changes into that script. Conversely, when making sweeping changes
 851    to this file, modifying gdbarch.sh and using its output may prove
 852    easier. */
 853
 854 EOF
 855 }
 856
 857 #
 858 # The .h file
 859 #
 860
 861 exec > new-gdbarch.h
 862 copyright
 863 cat <<EOF
 864 #ifndef GDBARCH_H
 865 #define GDBARCH_H
 866
 867 struct floatformat;
 868 struct ui_file;
 869 struct frame_info;
 870 struct value;
 871 struct objfile;
 872 struct obj_section;
 873 struct minimal_symbol;
 874 struct regcache;
 875 struct reggroup;
 876 struct regset;
 877 struct disassemble_info;
 878 struct target_ops;
 879 struct obstack;
 880 struct bp_target_info;
 881 struct target_desc;
 882 struct displaced_step_closure;
 883 struct core_regset_section;
 884 struct syscall;
 885
 886 /* The architecture associated with the connection to the target.
 887
 888    The architecture vector provides some information that is really
 889    a property of the target: The layout of certain packets, for instance;
 890    or the solib_ops vector.  Etc.  To differentiate architecture accesses
 891    to per-target properties from per-thread/per-frame/per-objfile properties,
 892    accesses to per-target properties should be made through target_gdbarch.
 893
 894    Eventually, when support for multiple targets is implemented in
 895    GDB, this global should be made target-specific.  */
 896 extern struct gdbarch *target_gdbarch;
 897 EOF
 898
 899 # function typedef's
 900 printf "\n"
 901 printf "\n"
 902 printf "/* The following are pre-initialized by GDBARCH. */\n"
 903 function_list | while do_read
 904 do
 905     if class_is_info_p
 906     then
 907         printf "\n"
 908         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 909         printf "/* set_gdbarch_${function}() - not applicable - pre-initialized. */\n"
 910     fi
 911 done
 912
 913 # function typedef's
 914 printf "\n"
 915 printf "\n"
 916 printf "/* The following are initialized by the target dependent code. */\n"
 917 function_list | while do_read
 918 do
 919     if [ -n "${comment}" ]
 920     then
 921         echo "${comment}" | sed \
 922             -e '2 s,#,/*,' \
 923             -e '3,$ s,#,  ,' \
 924             -e '$ s,$, */,'
 925     fi
 926
 927     if class_is_predicate_p
 928     then
 929         printf "\n"
 930         printf "extern int gdbarch_${function}_p (struct gdbarch *gdbarch);\n"
 931     fi
 932     if class_is_variable_p
 933     then
 934         printf "\n"
 935         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 936         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, ${returntype} ${function});\n"
 937     fi
 938     if class_is_function_p
 939     then
 940         printf "\n"
 941         if [ "x${formal}" = "xvoid" ] && class_is_multiarch_p
 942         then
 943             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch);\n"
 944         elif class_is_multiarch_p
 945         then
 946             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch, ${formal});\n"
 947         else
 948             printf "typedef ${returntype} (gdbarch_${function}_ftype) (${formal});\n"
 949         fi
 950         if [ "x${formal}" = "xvoid" ]
 951         then
 952           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 953         else
 954           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch, ${formal});\n"
 955         fi
 956         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, gdbarch_${function}_ftype *${function});\n"
 957     fi
 958 done
 959
 960 # close it off
 961 cat <<EOF
 962
 963 /* Definition for an unknown syscall, used basically in error-cases.  */
 964 #define UNKNOWN_SYSCALL (-1)
 965
 966 extern struct gdbarch_tdep *gdbarch_tdep (struct gdbarch *gdbarch);
 967
 968
 969 /* Mechanism for co-ordinating the selection of a specific
 970    architecture.
 971
 972    GDB targets (*-tdep.c) can register an interest in a specific
 973    architecture.  Other GDB components can register a need to maintain
 974    per-architecture data.
 975
 976    The mechanisms below ensures that there is only a loose connection
 977    between the set-architecture command and the various GDB
 978    components.  Each component can independently register their need
 979    to maintain architecture specific data with gdbarch.
 980
 981    Pragmatics:
 982
 983    Previously, a single TARGET_ARCHITECTURE_HOOK was provided.  It
 984    didn't scale.
 985
 986    The more traditional mega-struct containing architecture specific
 987    data for all the various GDB components was also considered.  Since
 988    GDB is built from a variable number of (fairly independent)
 989    components it was determined that the global aproach was not
 990    applicable. */
 991
 992
 993 /* Register a new architectural family with GDB.
 994
 995    Register support for the specified ARCHITECTURE with GDB.  When
 996    gdbarch determines that the specified architecture has been
 997    selected, the corresponding INIT function is called.
 998
 999    --
1000
1001    The INIT function takes two parameters: INFO which contains the
1002    information available to gdbarch about the (possibly new)
1003    architecture; ARCHES which is a list of the previously created
1004    \`\`struct gdbarch'' for this architecture.
1005
1006    The INFO parameter is, as far as possible, be pre-initialized with
1007    information obtained from INFO.ABFD or the global defaults.
1008
1009    The ARCHES parameter is a linked list (sorted most recently used)
1010    of all the previously created architures for this architecture
1011    family.  The (possibly NULL) ARCHES->gdbarch can used to access
1012    values from the previously selected architecture for this
1013    architecture family.
1014
1015    The INIT function shall return any of: NULL - indicating that it
1016    doesn't recognize the selected architecture; an existing \`\`struct
1017    gdbarch'' from the ARCHES list - indicating that the new
1018    architecture is just a synonym for an earlier architecture (see
1019    gdbarch_list_lookup_by_info()); a newly created \`\`struct gdbarch''
1020    - that describes the selected architecture (see gdbarch_alloc()).
1021
1022    The DUMP_TDEP function shall print out all target specific values.
1023    Care should be taken to ensure that the function works in both the
1024    multi-arch and non- multi-arch cases. */
1025
1026 struct gdbarch_list
1027 {
1028   struct gdbarch *gdbarch;
1029   struct gdbarch_list *next;
1030 };
1031
1032 struct gdbarch_info
1033 {
1034   /* Use default: NULL (ZERO). */
1035   const struct bfd_arch_info *bfd_arch_info;
1036
1037   /* Use default: BFD_ENDIAN_UNKNOWN (NB: is not ZERO).  */
1038   int byte_order;
1039
1040   int byte_order_for_code;
1041
1042   /* Use default: NULL (ZERO). */
1043   bfd *abfd;
1044
1045   /* Use default: NULL (ZERO). */
1046   struct gdbarch_tdep_info *tdep_info;
1047
1048   /* Use default: GDB_OSABI_UNINITIALIZED (-1).  */
1049   enum gdb_osabi osabi;
1050
1051   /* Use default: NULL (ZERO).  */
1052   const struct target_desc *target_desc;
1053 };
1054
1055 typedef struct gdbarch *(gdbarch_init_ftype) (struct gdbarch_info info, struct gdbarch_list *arches);
1056 typedef void (gdbarch_dump_tdep_ftype) (struct gdbarch *gdbarch, struct ui_file *file);
1057
1058 /* DEPRECATED - use gdbarch_register() */
1059 extern void register_gdbarch_init (enum bfd_architecture architecture, gdbarch_init_ftype *);
1060
1061 extern void gdbarch_register (enum bfd_architecture architecture,
1062                               gdbarch_init_ftype *,
1063                               gdbarch_dump_tdep_ftype *);
1064
1065
1066 /* Return a freshly allocated, NULL terminated, array of the valid
1067    architecture names.  Since architectures are registered during the
1068    _initialize phase this function only returns useful information
1069    once initialization has been completed. */
1070
1071 extern const char **gdbarch_printable_names (void);
1072
1073
1074 /* Helper function.  Search the list of ARCHES for a GDBARCH that
1075    matches the information provided by INFO. */
1076
1077 extern struct gdbarch_list *gdbarch_list_lookup_by_info (struct gdbarch_list *arches, const struct gdbarch_info *info);
1078
1079
1080 /* Helper function.  Create a preliminary \`\`struct gdbarch''.  Perform
1081    basic initialization using values obtained from the INFO and TDEP
1082    parameters.  set_gdbarch_*() functions are called to complete the
1083    initialization of the object. */
1084
1085 extern struct gdbarch *gdbarch_alloc (const struct gdbarch_info *info, struct gdbarch_tdep *tdep);
1086
1087
1088 /* Helper function.  Free a partially-constructed \`\`struct gdbarch''.
1089    It is assumed that the caller freeds the \`\`struct
1090    gdbarch_tdep''. */
1091
1092 extern void gdbarch_free (struct gdbarch *);
1093
1094
1095 /* Helper function.  Allocate memory from the \`\`struct gdbarch''
1096    obstack.  The memory is freed when the corresponding architecture
1097    is also freed.  */
1098
1099 extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
1100 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
1101 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
1102
1103
1104 /* Helper function. Force an update of the current architecture.
1105
1106    The actual architecture selected is determined by INFO, \`\`(gdb) set
1107    architecture'' et.al., the existing architecture and BFD's default
1108    architecture.  INFO should be initialized to zero and then selected
1109    fields should be updated.
1110
1111    Returns non-zero if the update succeeds */
1112
1113 extern int gdbarch_update_p (struct gdbarch_info info);
1114
1115
1116 /* Helper function.  Find an architecture matching info.
1117
1118    INFO should be initialized using gdbarch_info_init, relevant fields
1119    set, and then finished using gdbarch_info_fill.
1120
1121    Returns the corresponding architecture, or NULL if no matching
1122    architecture was found.  */
1123
1124 extern struct gdbarch *gdbarch_find_by_info (struct gdbarch_info info);
1125
1126
1127 /* Helper function.  Set the global "target_gdbarch" to "gdbarch".
1128
1129    FIXME: kettenis/20031124: Of the functions that follow, only
1130    gdbarch_from_bfd is supposed to survive.  The others will
1131    dissappear since in the future GDB will (hopefully) be truly
1132    multi-arch.  However, for now we're still stuck with the concept of
1133    a single active architecture.  */
1134
1135 extern void deprecated_target_gdbarch_select_hack (struct gdbarch *gdbarch);
1136
1137
1138 /* Register per-architecture data-pointer.
1139
1140    Reserve space for a per-architecture data-pointer.  An identifier
1141    for the reserved data-pointer is returned.  That identifer should
1142    be saved in a local static variable.
1143
1144    Memory for the per-architecture data shall be allocated using
1145    gdbarch_obstack_zalloc.  That memory will be deleted when the
1146    corresponding architecture object is deleted.
1147
1148    When a previously created architecture is re-selected, the
1149    per-architecture data-pointer for that previous architecture is
1150    restored.  INIT() is not re-called.
1151
1152    Multiple registrarants for any architecture are allowed (and
1153    strongly encouraged).  */
1154
1155 struct gdbarch_data;
1156
1157 typedef void *(gdbarch_data_pre_init_ftype) (struct obstack *obstack);
1158 extern struct gdbarch_data *gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *init);
1159 typedef void *(gdbarch_data_post_init_ftype) (struct gdbarch *gdbarch);
1160 extern struct gdbarch_data *gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *init);
1161 extern void deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1162                                          struct gdbarch_data *data,
1163                                          void *pointer);
1164
1165 extern void *gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *);
1166
1167
1168 /* Set the dynamic target-system-dependent parameters (architecture,
1169    byte-order, ...) using information found in the BFD */
1170
1171 extern void set_gdbarch_from_file (bfd *);
1172
1173
1174 /* Initialize the current architecture to the "first" one we find on
1175    our list.  */
1176
1177 extern void initialize_current_architecture (void);
1178
1179 /* gdbarch trace variable */
1180 extern int gdbarch_debug;
1181
1182 extern void gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file);
1183
1184 #endif
1185 EOF
1186 exec 1>&2
1187 #../move-if-change new-gdbarch.h gdbarch.h
1188 compare_new gdbarch.h
1189
1190
1191 #
1192 # C file
1193 #
1194
1195 exec > new-gdbarch.c
1196 copyright
1197 cat <<EOF
1198
1199 #include "defs.h"
1200 #include "arch-utils.h"
1201
1202 #include "gdbcmd.h"
1203 #include "inferior.h"
1204 #include "symcat.h"
1205
1206 #include "floatformat.h"
1207
1208 #include "gdb_assert.h"
1209 #include "gdb_string.h"
1210 #include "reggroups.h"
1211 #include "osabi.h"
1212 #include "gdb_obstack.h"
1213 #include "observer.h"
1214 #include "regcache.h"
1215
1216 /* Static function declarations */
1217
1218 static void alloc_gdbarch_data (struct gdbarch *);
1219
1220 /* Non-zero if we want to trace architecture code.  */
1221
1222 #ifndef GDBARCH_DEBUG
1223 #define GDBARCH_DEBUG 0
1224 #endif
1225 int gdbarch_debug = GDBARCH_DEBUG;
1226 static void
1227 show_gdbarch_debug (struct ui_file *file, int from_tty,
1228                     struct cmd_list_element *c, const char *value)
1229 {
1230   fprintf_filtered (file, _("Architecture debugging is %s.\\n"), value);
1231 }
1232
1233 static const char *
1234 pformat (const struct floatformat **format)
1235 {
1236   if (format == NULL)
1237     return "(null)";
1238   else
1239     /* Just print out one of them - this is only for diagnostics.  */
1240     return format[0]->name;
1241 }
1242
1243 EOF
1244
1245 # gdbarch open the gdbarch object
1246 printf "\n"
1247 printf "/* Maintain the struct gdbarch object */\n"
1248 printf "\n"
1249 printf "struct gdbarch\n"
1250 printf "{\n"
1251 printf "  /* Has this architecture been fully initialized?  */\n"
1252 printf "  int initialized_p;\n"
1253 printf "\n"
1254 printf "  /* An obstack bound to the lifetime of the architecture.  */\n"
1255 printf "  struct obstack *obstack;\n"
1256 printf "\n"
1257 printf "  /* basic architectural information */\n"
1258 function_list | while do_read
1259 do
1260     if class_is_info_p
1261     then
1262         printf "  ${returntype} ${function};\n"
1263     fi
1264 done
1265 printf "\n"
1266 printf "  /* target specific vector. */\n"
1267 printf "  struct gdbarch_tdep *tdep;\n"
1268 printf "  gdbarch_dump_tdep_ftype *dump_tdep;\n"
1269 printf "\n"
1270 printf "  /* per-architecture data-pointers */\n"
1271 printf "  unsigned nr_data;\n"
1272 printf "  void **data;\n"
1273 printf "\n"
1274 printf "  /* per-architecture swap-regions */\n"
1275 printf "  struct gdbarch_swap *swap;\n"
1276 printf "\n"
1277 cat <<EOF
1278   /* Multi-arch values.
1279
1280      When extending this structure you must:
1281
1282      Add the field below.
1283
1284      Declare set/get functions and define the corresponding
1285      macro in gdbarch.h.
1286
1287      gdbarch_alloc(): If zero/NULL is not a suitable default,
1288      initialize the new field.
1289
1290      verify_gdbarch(): Confirm that the target updated the field
1291      correctly.
1292
1293      gdbarch_dump(): Add a fprintf_unfiltered call so that the new
1294      field is dumped out
1295
1296      \`\`startup_gdbarch()'': Append an initial value to the static
1297      variable (base values on the host's c-type system).
1298
1299      get_gdbarch(): Implement the set/get functions (probably using
1300      the macro's as shortcuts).
1301
1302      */
1303
1304 EOF
1305 function_list | while do_read
1306 do
1307     if class_is_variable_p
1308     then
1309         printf "  ${returntype} ${function};\n"
1310     elif class_is_function_p
1311     then
1312         printf "  gdbarch_${function}_ftype *${function};\n"
1313     fi
1314 done
1315 printf "};\n"
1316
1317 # A pre-initialized vector
1318 printf "\n"
1319 printf "\n"
1320 cat <<EOF
1321 /* The default architecture uses host values (for want of a better
1322    choice). */
1323 EOF
1324 printf "\n"
1325 printf "extern const struct bfd_arch_info bfd_default_arch_struct;\n"
1326 printf "\n"
1327 printf "struct gdbarch startup_gdbarch =\n"
1328 printf "{\n"
1329 printf "  1, /* Always initialized.  */\n"
1330 printf "  NULL, /* The obstack.  */\n"
1331 printf "  /* basic architecture information */\n"
1332 function_list | while do_read
1333 do
1334     if class_is_info_p
1335     then
1336         printf "  ${staticdefault},  /* ${function} */\n"
1337     fi
1338 done
1339 cat <<EOF
1340   /* target specific vector and its dump routine */
1341   NULL, NULL,
1342   /*per-architecture data-pointers and swap regions */
1343   0, NULL, NULL,
1344   /* Multi-arch values */
1345 EOF
1346 function_list | while do_read
1347 do
1348     if class_is_function_p || class_is_variable_p
1349     then
1350         printf "  ${staticdefault},  /* ${function} */\n"
1351     fi
1352 done
1353 cat <<EOF
1354   /* startup_gdbarch() */
1355 };
1356
1357 struct gdbarch *target_gdbarch = &startup_gdbarch;
1358 EOF
1359
1360 # Create a new gdbarch struct
1361 cat <<EOF
1362
1363 /* Create a new \`\`struct gdbarch'' based on information provided by
1364    \`\`struct gdbarch_info''. */
1365 EOF
1366 printf "\n"
1367 cat <<EOF
1368 struct gdbarch *
1369 gdbarch_alloc (const struct gdbarch_info *info,
1370                struct gdbarch_tdep *tdep)
1371 {
1372   struct gdbarch *gdbarch;
1373
1374   /* Create an obstack for allocating all the per-architecture memory,
1375      then use that to allocate the architecture vector.  */
1376   struct obstack *obstack = XMALLOC (struct obstack);
1377   obstack_init (obstack);
1378   gdbarch = obstack_alloc (obstack, sizeof (*gdbarch));
1379   memset (gdbarch, 0, sizeof (*gdbarch));
1380   gdbarch->obstack = obstack;
1381
1382   alloc_gdbarch_data (gdbarch);
1383
1384   gdbarch->tdep = tdep;
1385 EOF
1386 printf "\n"
1387 function_list | while do_read
1388 do
1389     if class_is_info_p
1390     then
1391         printf "  gdbarch->${function} = info->${function};\n"
1392     fi
1393 done
1394 printf "\n"
1395 printf "  /* Force the explicit initialization of these. */\n"
1396 function_list | while do_read
1397 do
1398     if class_is_function_p || class_is_variable_p
1399     then
1400         if [ -n "${predefault}" -a "x${predefault}" != "x0" ]
1401         then
1402           printf "  gdbarch->${function} = ${predefault};\n"
1403         fi
1404     fi
1405 done
1406 cat <<EOF
1407   /* gdbarch_alloc() */
1408
1409   return gdbarch;
1410 }
1411 EOF
1412
1413 # Free a gdbarch struct.
1414 printf "\n"
1415 printf "\n"
1416 cat <<EOF
1417 /* Allocate extra space using the per-architecture obstack.  */
1418
1419 void *
1420 gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
1421 {
1422   void *data = obstack_alloc (arch->obstack, size);
1423   memset (data, 0, size);
1424   return data;
1425 }
1426
1427
1428 /* Free a gdbarch struct.  This should never happen in normal
1429    operation --- once you've created a gdbarch, you keep it around.
1430    However, if an architecture's init function encounters an error
1431    building the structure, it may need to clean up a partially
1432    constructed gdbarch.  */
1433
1434 void
1435 gdbarch_free (struct gdbarch *arch)
1436 {
1437   struct obstack *obstack;
1438   gdb_assert (arch != NULL);
1439   gdb_assert (!arch->initialized_p);
1440   obstack = arch->obstack;
1441   obstack_free (obstack, 0); /* Includes the ARCH.  */
1442   xfree (obstack);
1443 }
1444 EOF
1445
1446 # verify a new architecture
1447 cat <<EOF
1448
1449
1450 /* Ensure that all values in a GDBARCH are reasonable.  */
1451
1452 static void
1453 verify_gdbarch (struct gdbarch *gdbarch)
1454 {
1455   struct ui_file *log;
1456   struct cleanup *cleanups;
1457   long length;
1458   char *buf;
1459   log = mem_fileopen ();
1460   cleanups = make_cleanup_ui_file_delete (log);
1461   /* fundamental */
1462   if (gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)
1463     fprintf_unfiltered (log, "\n\tbyte-order");
1464   if (gdbarch->bfd_arch_info == NULL)
1465     fprintf_unfiltered (log, "\n\tbfd_arch_info");
1466   /* Check those that need to be defined for the given multi-arch level. */
1467 EOF
1468 function_list | while do_read
1469 do
1470     if class_is_function_p || class_is_variable_p
1471     then
1472         if [ "x${invalid_p}" = "x0" ]
1473         then
1474             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1475         elif class_is_predicate_p
1476         then
1477             printf "  /* Skip verify of ${function}, has predicate */\n"
1478         # FIXME: See do_read for potential simplification
1479         elif [ -n "${invalid_p}" -a -n "${postdefault}" ]
1480         then
1481             printf "  if (${invalid_p})\n"
1482             printf "    gdbarch->${function} = ${postdefault};\n"
1483         elif [ -n "${predefault}" -a -n "${postdefault}" ]
1484         then
1485             printf "  if (gdbarch->${function} == ${predefault})\n"
1486             printf "    gdbarch->${function} = ${postdefault};\n"
1487         elif [ -n "${postdefault}" ]
1488         then
1489             printf "  if (gdbarch->${function} == 0)\n"
1490             printf "    gdbarch->${function} = ${postdefault};\n"
1491         elif [ -n "${invalid_p}" ]
1492         then
1493             printf "  if (${invalid_p})\n"
1494             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1495         elif [ -n "${predefault}" ]
1496         then
1497             printf "  if (gdbarch->${function} == ${predefault})\n"
1498             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1499         fi
1500     fi
1501 done
1502 cat <<EOF
1503   buf = ui_file_xstrdup (log, &length);
1504   make_cleanup (xfree, buf);
1505   if (length > 0)
1506     internal_error (__FILE__, __LINE__,
1507                     _("verify_gdbarch: the following are invalid ...%s"),
1508                     buf);
1509   do_cleanups (cleanups);
1510 }
1511 EOF
1512
1513 # dump the structure
1514 printf "\n"
1515 printf "\n"
1516 cat <<EOF
1517 /* Print out the details of the current architecture. */
1518
1519 void
1520 gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
1521 {
1522   const char *gdb_nm_file = "<not-defined>";
1523 #if defined (GDB_NM_FILE)
1524   gdb_nm_file = GDB_NM_FILE;
1525 #endif
1526   fprintf_unfiltered (file,
1527                       "gdbarch_dump: GDB_NM_FILE = %s\\n",
1528                       gdb_nm_file);
1529 EOF
1530 function_list | sort -t: -k 3 | while do_read
1531 do
1532     # First the predicate
1533     if class_is_predicate_p
1534     then
1535         printf "  fprintf_unfiltered (file,\n"
1536         printf "                      \"gdbarch_dump: gdbarch_${function}_p() = %%d\\\\n\",\n"
1537         printf "                      gdbarch_${function}_p (gdbarch));\n"
1538     fi
1539     # Print the corresponding value.
1540     if class_is_function_p
1541     then
1542         printf "  fprintf_unfiltered (file,\n"
1543         printf "                      \"gdbarch_dump: ${function} = <%%s>\\\\n\",\n"
1544         printf "                      host_address_to_string (gdbarch->${function}));\n"
1545     else
1546         # It is a variable
1547         case "${print}:${returntype}" in
1548             :CORE_ADDR )
1549                 fmt="%s"
1550                 print="core_addr_to_string_nz (gdbarch->${function})"
1551                 ;;
1552             :* )
1553                 fmt="%s"
1554                 print="plongest (gdbarch->${function})"
1555                 ;;
1556             * )
1557                 fmt="%s"
1558                 ;;
1559         esac
1560         printf "  fprintf_unfiltered (file,\n"
1561         printf "                      \"gdbarch_dump: ${function} = %s\\\\n\",\n" "${fmt}"
1562         printf "                      ${print});\n"
1563     fi
1564 done
1565 cat <<EOF
1566   if (gdbarch->dump_tdep != NULL)
1567     gdbarch->dump_tdep (gdbarch, file);
1568 }
1569 EOF
1570
1571
1572 # GET/SET
1573 printf "\n"
1574 cat <<EOF
1575 struct gdbarch_tdep *
1576 gdbarch_tdep (struct gdbarch *gdbarch)
1577 {
1578   if (gdbarch_debug >= 2)
1579     fprintf_unfiltered (gdb_stdlog, "gdbarch_tdep called\\n");
1580   return gdbarch->tdep;
1581 }
1582 EOF
1583 printf "\n"
1584 function_list | while do_read
1585 do
1586     if class_is_predicate_p
1587     then
1588         printf "\n"
1589         printf "int\n"
1590         printf "gdbarch_${function}_p (struct gdbarch *gdbarch)\n"
1591         printf "{\n"
1592         printf "  gdb_assert (gdbarch != NULL);\n"
1593         printf "  return ${predicate};\n"
1594         printf "}\n"
1595     fi
1596     if class_is_function_p
1597     then
1598         printf "\n"
1599         printf "${returntype}\n"
1600         if [ "x${formal}" = "xvoid" ]
1601         then
1602           printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1603         else
1604           printf "gdbarch_${function} (struct gdbarch *gdbarch, ${formal})\n"
1605         fi
1606         printf "{\n"
1607         printf "  gdb_assert (gdbarch != NULL);\n"
1608         printf "  gdb_assert (gdbarch->${function} != NULL);\n"
1609         if class_is_predicate_p && test -n "${predefault}"
1610         then
1611             # Allow a call to a function with a predicate.
1612             printf "  /* Do not check predicate: ${predicate}, allow call.  */\n"
1613         fi
1614         printf "  if (gdbarch_debug >= 2)\n"
1615         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1616         if [ "x${actual}" = "x-" -o "x${actual}" = "x" ]
1617         then
1618             if class_is_multiarch_p
1619             then
1620                 params="gdbarch"
1621             else
1622                 params=""
1623             fi
1624         else
1625             if class_is_multiarch_p
1626             then
1627                 params="gdbarch, ${actual}"
1628             else
1629                 params="${actual}"
1630             fi
1631         fi
1632         if [ "x${returntype}" = "xvoid" ]
1633         then
1634           printf "  gdbarch->${function} (${params});\n"
1635         else
1636           printf "  return gdbarch->${function} (${params});\n"
1637         fi
1638         printf "}\n"
1639         printf "\n"
1640         printf "void\n"
1641         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1642         printf "            `echo ${function} | sed -e 's/./ /g'`  gdbarch_${function}_ftype ${function})\n"
1643         printf "{\n"
1644         printf "  gdbarch->${function} = ${function};\n"
1645         printf "}\n"
1646     elif class_is_variable_p
1647     then
1648         printf "\n"
1649         printf "${returntype}\n"
1650         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1651         printf "{\n"
1652         printf "  gdb_assert (gdbarch != NULL);\n"
1653         if [ "x${invalid_p}" = "x0" ]
1654         then
1655             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1656         elif [ -n "${invalid_p}" ]
1657         then
1658             printf "  /* Check variable is valid.  */\n"
1659             printf "  gdb_assert (!(${invalid_p}));\n"
1660         elif [ -n "${predefault}" ]
1661         then
1662             printf "  /* Check variable changed from pre-default.  */\n"
1663             printf "  gdb_assert (gdbarch->${function} != ${predefault});\n"
1664         fi
1665         printf "  if (gdbarch_debug >= 2)\n"
1666         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1667         printf "  return gdbarch->${function};\n"
1668         printf "}\n"
1669         printf "\n"
1670         printf "void\n"
1671         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1672         printf "            `echo ${function} | sed -e 's/./ /g'`  ${returntype} ${function})\n"
1673         printf "{\n"
1674         printf "  gdbarch->${function} = ${function};\n"
1675         printf "}\n"
1676     elif class_is_info_p
1677     then
1678         printf "\n"
1679         printf "${returntype}\n"
1680         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1681         printf "{\n"
1682         printf "  gdb_assert (gdbarch != NULL);\n"
1683         printf "  if (gdbarch_debug >= 2)\n"
1684         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1685         printf "  return gdbarch->${function};\n"
1686         printf "}\n"
1687     fi
1688 done
1689
1690 # All the trailing guff
1691 cat <<EOF
1692
1693
1694 /* Keep a registry of per-architecture data-pointers required by GDB
1695    modules. */
1696
1697 struct gdbarch_data
1698 {
1699   unsigned index;
1700   int init_p;
1701   gdbarch_data_pre_init_ftype *pre_init;
1702   gdbarch_data_post_init_ftype *post_init;
1703 };
1704
1705 struct gdbarch_data_registration
1706 {
1707   struct gdbarch_data *data;
1708   struct gdbarch_data_registration *next;
1709 };
1710
1711 struct gdbarch_data_registry
1712 {
1713   unsigned nr;
1714   struct gdbarch_data_registration *registrations;
1715 };
1716
1717 struct gdbarch_data_registry gdbarch_data_registry =
1718 {
1719   0, NULL,
1720 };
1721
1722 static struct gdbarch_data *
1723 gdbarch_data_register (gdbarch_data_pre_init_ftype *pre_init,
1724                        gdbarch_data_post_init_ftype *post_init)
1725 {
1726   struct gdbarch_data_registration **curr;
1727   /* Append the new registraration.  */
1728   for (curr = &gdbarch_data_registry.registrations;
1729        (*curr) != NULL;
1730        curr = &(*curr)->next);
1731   (*curr) = XMALLOC (struct gdbarch_data_registration);
1732   (*curr)->next = NULL;
1733   (*curr)->data = XMALLOC (struct gdbarch_data);
1734   (*curr)->data->index = gdbarch_data_registry.nr++;
1735   (*curr)->data->pre_init = pre_init;
1736   (*curr)->data->post_init = post_init;
1737   (*curr)->data->init_p = 1;
1738   return (*curr)->data;
1739 }
1740
1741 struct gdbarch_data *
1742 gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *pre_init)
1743 {
1744   return gdbarch_data_register (pre_init, NULL);
1745 }
1746
1747 struct gdbarch_data *
1748 gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *post_init)
1749 {
1750   return gdbarch_data_register (NULL, post_init);
1751 }
1752
1753 /* Create/delete the gdbarch data vector. */
1754
1755 static void
1756 alloc_gdbarch_data (struct gdbarch *gdbarch)
1757 {
1758   gdb_assert (gdbarch->data == NULL);
1759   gdbarch->nr_data = gdbarch_data_registry.nr;
1760   gdbarch->data = GDBARCH_OBSTACK_CALLOC (gdbarch, gdbarch->nr_data, void *);
1761 }
1762
1763 /* Initialize the current value of the specified per-architecture
1764    data-pointer. */
1765
1766 void
1767 deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1768                              struct gdbarch_data *data,
1769                              void *pointer)
1770 {
1771   gdb_assert (data->index < gdbarch->nr_data);
1772   gdb_assert (gdbarch->data[data->index] == NULL);
1773   gdb_assert (data->pre_init == NULL);
1774   gdbarch->data[data->index] = pointer;
1775 }
1776
1777 /* Return the current value of the specified per-architecture
1778    data-pointer. */
1779
1780 void *
1781 gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *data)
1782 {
1783   gdb_assert (data->index < gdbarch->nr_data);
1784   if (gdbarch->data[data->index] == NULL)
1785     {
1786       /* The data-pointer isn't initialized, call init() to get a
1787          value.  */
1788       if (data->pre_init != NULL)
1789         /* Mid architecture creation: pass just the obstack, and not
1790            the entire architecture, as that way it isn't possible for
1791            pre-init code to refer to undefined architecture
1792            fields.  */
1793         gdbarch->data[data->index] = data->pre_init (gdbarch->obstack);
1794       else if (gdbarch->initialized_p
1795                && data->post_init != NULL)
1796         /* Post architecture creation: pass the entire architecture
1797            (as all fields are valid), but be careful to also detect
1798            recursive references.  */
1799         {
1800           gdb_assert (data->init_p);
1801           data->init_p = 0;
1802           gdbarch->data[data->index] = data->post_init (gdbarch);
1803           data->init_p = 1;
1804         }
1805       else
1806         /* The architecture initialization hasn't completed - punt -
1807          hope that the caller knows what they are doing.  Once
1808          deprecated_set_gdbarch_data has been initialized, this can be
1809          changed to an internal error.  */
1810         return NULL;
1811       gdb_assert (gdbarch->data[data->index] != NULL);
1812     }
1813   return gdbarch->data[data->index];
1814 }
1815
1816
1817 /* Keep a registry of the architectures known by GDB. */
1818
1819 struct gdbarch_registration
1820 {
1821   enum bfd_architecture bfd_architecture;
1822   gdbarch_init_ftype *init;
1823   gdbarch_dump_tdep_ftype *dump_tdep;
1824   struct gdbarch_list *arches;
1825   struct gdbarch_registration *next;
1826 };
1827
1828 static struct gdbarch_registration *gdbarch_registry = NULL;
1829
1830 static void
1831 append_name (const char ***buf, int *nr, const char *name)
1832 {
1833   *buf = xrealloc (*buf, sizeof (char**) * (*nr + 1));
1834   (*buf)[*nr] = name;
1835   *nr += 1;
1836 }
1837
1838 const char **
1839 gdbarch_printable_names (void)
1840 {
1841   /* Accumulate a list of names based on the registed list of
1842      architectures. */
1843   enum bfd_architecture a;
1844   int nr_arches = 0;
1845   const char **arches = NULL;
1846   struct gdbarch_registration *rego;
1847   for (rego = gdbarch_registry;
1848        rego != NULL;
1849        rego = rego->next)
1850     {
1851       const struct bfd_arch_info *ap;
1852       ap = bfd_lookup_arch (rego->bfd_architecture, 0);
1853       if (ap == NULL)
1854         internal_error (__FILE__, __LINE__,
1855                         _("gdbarch_architecture_names: multi-arch unknown"));
1856       do
1857         {
1858           append_name (&arches, &nr_arches, ap->printable_name);
1859           ap = ap->next;
1860         }
1861       while (ap != NULL);
1862     }
1863   append_name (&arches, &nr_arches, NULL);
1864   return arches;
1865 }
1866
1867
1868 void
1869 gdbarch_register (enum bfd_architecture bfd_architecture,
1870                   gdbarch_init_ftype *init,
1871                   gdbarch_dump_tdep_ftype *dump_tdep)
1872 {
1873   struct gdbarch_registration **curr;
1874   const struct bfd_arch_info *bfd_arch_info;
1875   /* Check that BFD recognizes this architecture */
1876   bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0);
1877   if (bfd_arch_info == NULL)
1878     {
1879       internal_error (__FILE__, __LINE__,
1880                       _("gdbarch: Attempt to register unknown architecture (%d)"),
1881                       bfd_architecture);
1882     }
1883   /* Check that we haven't seen this architecture before */
1884   for (curr = &gdbarch_registry;
1885        (*curr) != NULL;
1886        curr = &(*curr)->next)
1887     {
1888       if (bfd_architecture == (*curr)->bfd_architecture)
1889         internal_error (__FILE__, __LINE__,
1890                         _("gdbarch: Duplicate registraration of architecture (%s)"),
1891                         bfd_arch_info->printable_name);
1892     }
1893   /* log it */
1894   if (gdbarch_debug)
1895     fprintf_unfiltered (gdb_stdlog, "register_gdbarch_init (%s, %s)\n",
1896                         bfd_arch_info->printable_name,
1897                         host_address_to_string (init));
1898   /* Append it */
1899   (*curr) = XMALLOC (struct gdbarch_registration);
1900   (*curr)->bfd_architecture = bfd_architecture;
1901   (*curr)->init = init;
1902   (*curr)->dump_tdep = dump_tdep;
1903   (*curr)->arches = NULL;
1904   (*curr)->next = NULL;
1905 }
1906
1907 void
1908 register_gdbarch_init (enum bfd_architecture bfd_architecture,
1909                        gdbarch_init_ftype *init)
1910 {
1911   gdbarch_register (bfd_architecture, init, NULL);
1912 }
1913
1914
1915 /* Look for an architecture using gdbarch_info.  */
1916
1917 struct gdbarch_list *
1918 gdbarch_list_lookup_by_info (struct gdbarch_list *arches,
1919                              const struct gdbarch_info *info)
1920 {
1921   for (; arches != NULL; arches = arches->next)
1922     {
1923       if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info)
1924         continue;
1925       if (info->byte_order != arches->gdbarch->byte_order)
1926         continue;
1927       if (info->osabi != arches->gdbarch->osabi)
1928         continue;
1929       if (info->target_desc != arches->gdbarch->target_desc)
1930         continue;
1931       return arches;
1932     }
1933   return NULL;
1934 }
1935
1936
1937 /* Find an architecture that matches the specified INFO.  Create a new
1938    architecture if needed.  Return that new architecture.  */
1939
1940 struct gdbarch *
1941 gdbarch_find_by_info (struct gdbarch_info info)
1942 {
1943   struct gdbarch *new_gdbarch;
1944   struct gdbarch_registration *rego;
1945
1946   /* Fill in missing parts of the INFO struct using a number of
1947      sources: "set ..."; INFOabfd supplied; and the global
1948      defaults.  */
1949   gdbarch_info_fill (&info);
1950
1951   /* Must have found some sort of architecture. */
1952   gdb_assert (info.bfd_arch_info != NULL);
1953
1954   if (gdbarch_debug)
1955     {
1956       fprintf_unfiltered (gdb_stdlog,
1957                           "gdbarch_find_by_info: info.bfd_arch_info %s\n",
1958                           (info.bfd_arch_info != NULL
1959                            ? info.bfd_arch_info->printable_name
1960                            : "(null)"));
1961       fprintf_unfiltered (gdb_stdlog,
1962                           "gdbarch_find_by_info: info.byte_order %d (%s)\n",
1963                           info.byte_order,
1964                           (info.byte_order == BFD_ENDIAN_BIG ? "big"
1965                            : info.byte_order == BFD_ENDIAN_LITTLE ? "little"
1966                            : "default"));
1967       fprintf_unfiltered (gdb_stdlog,
1968                           "gdbarch_find_by_info: info.osabi %d (%s)\n",
1969                           info.osabi, gdbarch_osabi_name (info.osabi));
1970       fprintf_unfiltered (gdb_stdlog,
1971                           "gdbarch_find_by_info: info.abfd %s\n",
1972                           host_address_to_string (info.abfd));
1973       fprintf_unfiltered (gdb_stdlog,
1974                           "gdbarch_find_by_info: info.tdep_info %s\n",
1975                           host_address_to_string (info.tdep_info));
1976     }
1977
1978   /* Find the tdep code that knows about this architecture.  */
1979   for (rego = gdbarch_registry;
1980        rego != NULL;
1981        rego = rego->next)
1982     if (rego->bfd_architecture == info.bfd_arch_info->arch)
1983       break;
1984   if (rego == NULL)
1985     {
1986       if (gdbarch_debug)
1987         fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
1988                             "No matching architecture\n");
1989       return 0;
1990     }
1991
1992   /* Ask the tdep code for an architecture that matches "info".  */
1993   new_gdbarch = rego->init (info, rego->arches);
1994
1995   /* Did the tdep code like it?  No.  Reject the change and revert to
1996      the old architecture.  */
1997   if (new_gdbarch == NULL)
1998     {
1999       if (gdbarch_debug)
2000         fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
2001                             "Target rejected architecture\n");
2002       return NULL;
2003     }
2004
2005   /* Is this a pre-existing architecture (as determined by already
2006      being initialized)?  Move it to the front of the architecture
2007      list (keeping the list sorted Most Recently Used).  */
2008   if (new_gdbarch->initialized_p)
2009     {
2010       struct gdbarch_list **list;
2011       struct gdbarch_list *this;
2012       if (gdbarch_debug)
2013         fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
2014                             "Previous architecture %s (%s) selected\n",
2015                             host_address_to_string (new_gdbarch),
2016                             new_gdbarch->bfd_arch_info->printable_name);
2017       /* Find the existing arch in the list.  */
2018       for (list = &rego->arches;
2019            (*list) != NULL && (*list)->gdbarch != new_gdbarch;
2020            list = &(*list)->next);
2021       /* It had better be in the list of architectures.  */
2022       gdb_assert ((*list) != NULL && (*list)->gdbarch == new_gdbarch);
2023       /* Unlink THIS.  */
2024       this = (*list);
2025       (*list) = this->next;
2026       /* Insert THIS at the front.  */
2027       this->next = rego->arches;
2028       rego->arches = this;
2029       /* Return it.  */
2030       return new_gdbarch;
2031     }
2032
2033   /* It's a new architecture.  */
2034   if (gdbarch_debug)
2035     fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
2036                         "New architecture %s (%s) selected\n",
2037                         host_address_to_string (new_gdbarch),
2038                         new_gdbarch->bfd_arch_info->printable_name);
2039
2040   /* Insert the new architecture into the front of the architecture
2041      list (keep the list sorted Most Recently Used).  */
2042   {
2043     struct gdbarch_list *this = XMALLOC (struct gdbarch_list);
2044     this->next = rego->arches;
2045     this->gdbarch = new_gdbarch;
2046     rego->arches = this;
2047   }
2048
2049   /* Check that the newly installed architecture is valid.  Plug in
2050      any post init values.  */
2051   new_gdbarch->dump_tdep = rego->dump_tdep;
2052   verify_gdbarch (new_gdbarch);
2053   new_gdbarch->initialized_p = 1;
2054
2055   if (gdbarch_debug)
2056     gdbarch_dump (new_gdbarch, gdb_stdlog);
2057
2058   return new_gdbarch;
2059 }
2060
2061 /* Make the specified architecture current.  */
2062
2063 void
2064 deprecated_target_gdbarch_select_hack (struct gdbarch *new_gdbarch)
2065 {
2066   gdb_assert (new_gdbarch != NULL);
2067   gdb_assert (new_gdbarch->initialized_p);
2068   target_gdbarch = new_gdbarch;
2069   observer_notify_architecture_changed (new_gdbarch);
2070   registers_changed ();
2071 }
2072
2073 extern void _initialize_gdbarch (void);
2074
2075 void
2076 _initialize_gdbarch (void)
2077 {
2078   struct cmd_list_element *c;
2079
2080   add_setshow_zinteger_cmd ("arch", class_maintenance, &gdbarch_debug, _("\\
2081 Set architecture debugging."), _("\\
2082 Show architecture debugging."), _("\\
2083 When non-zero, architecture debugging is enabled."),
2084                             NULL,
2085                             show_gdbarch_debug,
2086                             &setdebuglist, &showdebuglist);
2087 }
2088 EOF
2089
2090 # close things off
2091 exec 1>&2
2092 #../move-if-change new-gdbarch.c gdbarch.c
2093 compare_new gdbarch.c