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