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 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 M:CORE_ADDR:adjust_breakpoint_address:CORE_ADDR bpaddr:bpaddr
 490 m:int:memory_insert_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_insert_breakpoint::0
 491 m:int:memory_remove_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_remove_breakpoint::0
 492 v:CORE_ADDR:decr_pc_after_break:::0:::0
 493
 494 # A function can be addressed by either it's "pointer" (possibly a
 495 # descriptor address) or "entry point" (first executable instruction).
 496 # The method "convert_from_func_ptr_addr" converting the former to the
 497 # latter.  gdbarch_deprecated_function_start_offset is being used to implement
 498 # a simplified subset of that functionality - the function's address
 499 # corresponds to the "function pointer" and the function's start
 500 # corresponds to the "function entry point" - and hence is redundant.
 501
 502 v:CORE_ADDR:deprecated_function_start_offset:::0:::0
 503
 504 # Return the remote protocol register number associated with this
 505 # register.  Normally the identity mapping.
 506 m:int:remote_register_number:int regno:regno::default_remote_register_number::0
 507
 508 # Fetch the target specific address used to represent a load module.
 509 F:CORE_ADDR:fetch_tls_load_module_address:struct objfile *objfile:objfile
 510 #
 511 v:CORE_ADDR:frame_args_skip:::0:::0
 512 M:CORE_ADDR:unwind_pc:struct frame_info *next_frame:next_frame
 513 M:CORE_ADDR:unwind_sp:struct frame_info *next_frame:next_frame
 514 # DEPRECATED_FRAME_LOCALS_ADDRESS as been replaced by the per-frame
 515 # frame-base.  Enable frame-base before frame-unwind.
 516 F:int:frame_num_args:struct frame_info *frame:frame
 517 #
 518 M:CORE_ADDR:frame_align:CORE_ADDR address:address
 519 m:int:stabs_argument_has_addr:struct type *type:type::default_stabs_argument_has_addr::0
 520 v:int:frame_red_zone_size
 521 #
 522 m:CORE_ADDR:convert_from_func_ptr_addr:CORE_ADDR addr, struct target_ops *targ:addr, targ::convert_from_func_ptr_addr_identity::0
 523 # On some machines there are bits in addresses which are not really
 524 # part of the address, but are used by the kernel, the hardware, etc.
 525 # for special purposes.  gdbarch_addr_bits_remove takes out any such bits so
 526 # we get a "real" address such as one would find in a symbol table.
 527 # This is used only for addresses of instructions, and even then I'm
 528 # not sure it's used in all contexts.  It exists to deal with there
 529 # being a few stray bits in the PC which would mislead us, not as some
 530 # sort of generic thing to handle alignment or segmentation (it's
 531 # possible it should be in TARGET_READ_PC instead).
 532 m:CORE_ADDR:addr_bits_remove:CORE_ADDR addr:addr::core_addr_identity::0
 533 # It is not at all clear why gdbarch_smash_text_address is not folded into
 534 # gdbarch_addr_bits_remove.
 535 m:CORE_ADDR:smash_text_address:CORE_ADDR addr:addr::core_addr_identity::0
 536
 537 # FIXME/cagney/2001-01-18: This should be split in two.  A target method that
 538 # indicates if the target needs software single step.  An ISA method to
 539 # implement it.
 540 #
 541 # FIXME/cagney/2001-01-18: This should be replaced with something that inserts
 542 # breakpoints using the breakpoint system instead of blatting memory directly
 543 # (as with rs6000).
 544 #
 545 # FIXME/cagney/2001-01-18: The logic is backwards.  It should be asking if the
 546 # target can single step.  If not, then implement single step using breakpoints.
 547 #
 548 # A return value of 1 means that the software_single_step breakpoints
 549 # were inserted; 0 means they were not.
 550 F:int:software_single_step:struct frame_info *frame:frame
 551
 552 # Return non-zero if the processor is executing a delay slot and a
 553 # further single-step is needed before the instruction finishes.
 554 M:int:single_step_through_delay:struct frame_info *frame:frame
 555 # FIXME: cagney/2003-08-28: Need to find a better way of selecting the
 556 # disassembler.  Perhaps objdump can handle it?
 557 f:int:print_insn:bfd_vma vma, struct disassemble_info *info:vma, info::0:
 558 f:CORE_ADDR:skip_trampoline_code:struct frame_info *frame, CORE_ADDR pc:frame, pc::generic_skip_trampoline_code::0
 559
 560
 561 # If in_solib_dynsym_resolve_code() returns true, and SKIP_SOLIB_RESOLVER
 562 # evaluates non-zero, this is the address where the debugger will place
 563 # a step-resume breakpoint to get us past the dynamic linker.
 564 m:CORE_ADDR:skip_solib_resolver:CORE_ADDR pc:pc::generic_skip_solib_resolver::0
 565 # Some systems also have trampoline code for returning from shared libs.
 566 m:int:in_solib_return_trampoline:CORE_ADDR pc, char *name:pc, name::generic_in_solib_return_trampoline::0
 567
 568 # A target might have problems with watchpoints as soon as the stack
 569 # frame of the current function has been destroyed.  This mostly happens
 570 # as the first action in a funtion's epilogue.  in_function_epilogue_p()
 571 # is defined to return a non-zero value if either the given addr is one
 572 # instruction after the stack destroying instruction up to the trailing
 573 # return instruction or if we can figure out that the stack frame has
 574 # already been invalidated regardless of the value of addr.  Targets
 575 # which don't suffer from that problem could just let this functionality
 576 # untouched.
 577 m:int:in_function_epilogue_p:CORE_ADDR addr:addr:0:generic_in_function_epilogue_p::0
 578 f:void:elf_make_msymbol_special:asymbol *sym, struct minimal_symbol *msym:sym, msym::default_elf_make_msymbol_special::0
 579 f:void:coff_make_msymbol_special:int val, struct minimal_symbol *msym:val, msym::default_coff_make_msymbol_special::0
 580 v:int:cannot_step_breakpoint:::0:0::0
 581 v:int:have_nonsteppable_watchpoint:::0:0::0
 582 F:int:address_class_type_flags:int byte_size, int dwarf2_addr_class:byte_size, dwarf2_addr_class
 583 M:const char *:address_class_type_flags_to_name:int type_flags:type_flags
 584 M:int:address_class_name_to_type_flags:const char *name, int *type_flags_ptr:name, type_flags_ptr
 585 # Is a register in a group
 586 m:int:register_reggroup_p:int regnum, struct reggroup *reggroup:regnum, reggroup::default_register_reggroup_p::0
 587 # Fetch the pointer to the ith function argument.
 588 F:CORE_ADDR:fetch_pointer_argument:struct frame_info *frame, int argi, struct type *type:frame, argi, type
 589
 590 # Return the appropriate register set for a core file section with
 591 # name SECT_NAME and size SECT_SIZE.
 592 M:const struct regset *:regset_from_core_section:const char *sect_name, size_t sect_size:sect_name, sect_size
 593
 594 # When creating core dumps, some systems encode the PID in addition
 595 # to the LWP id in core file register section names.  In those cases, the
 596 # "XXX" in ".reg/XXX" is encoded as [LWPID << 16 | PID].  This setting
 597 # is set to true for such architectures; false if "XXX" represents an LWP
 598 # or thread id with no special encoding.
 599 v:int:core_reg_section_encodes_pid:::0:0::0
 600
 601 # Supported register notes in a core file.
 602 v:struct core_regset_section *:core_regset_sections:const char *name, int len::::::host_address_to_string (gdbarch->core_regset_sections)
 603
 604 # Read offset OFFSET of TARGET_OBJECT_LIBRARIES formatted shared libraries list from
 605 # core file into buffer READBUF with length LEN.
 606 M:LONGEST:core_xfer_shared_libraries:gdb_byte *readbuf, ULONGEST offset, LONGEST len:readbuf, offset, len
 607
 608 # How the core_stratum layer converts a PTID from a core file to a
 609 # string.
 610 M:char *:core_pid_to_str:ptid_t ptid:ptid
 611
 612 # BFD target to use when generating a core file.
 613 V:const char *:gcore_bfd_target:::0:0:::gdbarch->gcore_bfd_target
 614
 615 # If the elements of C++ vtables are in-place function descriptors rather
 616 # than normal function pointers (which may point to code or a descriptor),
 617 # set this to one.
 618 v:int:vtable_function_descriptors:::0:0::0
 619
 620 # Set if the least significant bit of the delta is used instead of the least
 621 # significant bit of the pfn for pointers to virtual member functions.
 622 v:int:vbit_in_delta:::0:0::0
 623
 624 # Advance PC to next instruction in order to skip a permanent breakpoint.
 625 F:void:skip_permanent_breakpoint:struct regcache *regcache:regcache
 626
 627 # The maximum length of an instruction on this architecture.
 628 V:ULONGEST:max_insn_length:::0:0
 629
 630 # Copy the instruction at FROM to TO, and make any adjustments
 631 # necessary to single-step it at that address.
 632 #
 633 # REGS holds the state the thread's registers will have before
 634 # executing the copied instruction; the PC in REGS will refer to FROM,
 635 # not the copy at TO.  The caller should update it to point at TO later.
 636 #
 637 # Return a pointer to data of the architecture's choice to be passed
 638 # to gdbarch_displaced_step_fixup.  Or, return NULL to indicate that
 639 # the instruction's effects have been completely simulated, with the
 640 # resulting state written back to REGS.
 641 #
 642 # For a general explanation of displaced stepping and how GDB uses it,
 643 # see the comments in infrun.c.
 644 #
 645 # The TO area is only guaranteed to have space for
 646 # gdbarch_max_insn_length (arch) bytes, so this function must not
 647 # write more bytes than that to that area.
 648 #
 649 # If you do not provide this function, GDB assumes that the
 650 # architecture does not support displaced stepping.
 651 #
 652 # If your architecture doesn't need to adjust instructions before
 653 # single-stepping them, consider using simple_displaced_step_copy_insn
 654 # here.
 655 M:struct displaced_step_closure *:displaced_step_copy_insn:CORE_ADDR from, CORE_ADDR to, struct regcache *regs:from, to, regs
 656
 657 # Fix up the state resulting from successfully single-stepping a
 658 # displaced instruction, to give the result we would have gotten from
 659 # stepping the instruction in its original location.
 660 #
 661 # REGS is the register state resulting from single-stepping the
 662 # displaced instruction.
 663 #
 664 # CLOSURE is the result from the matching call to
 665 # gdbarch_displaced_step_copy_insn.
 666 #
 667 # If you provide gdbarch_displaced_step_copy_insn.but not this
 668 # function, then GDB assumes that no fixup is needed after
 669 # single-stepping the instruction.
 670 #
 671 # For a general explanation of displaced stepping and how GDB uses it,
 672 # see the comments in infrun.c.
 673 M:void:displaced_step_fixup:struct displaced_step_closure *closure, CORE_ADDR from, CORE_ADDR to, struct regcache *regs:closure, from, to, regs::NULL
 674
 675 # Free a closure returned by gdbarch_displaced_step_copy_insn.
 676 #
 677 # If you provide gdbarch_displaced_step_copy_insn, you must provide
 678 # this function as well.
 679 #
 680 # If your architecture uses closures that don't need to be freed, then
 681 # you can use simple_displaced_step_free_closure here.
 682 #
 683 # For a general explanation of displaced stepping and how GDB uses it,
 684 # see the comments in infrun.c.
 685 m:void:displaced_step_free_closure:struct displaced_step_closure *closure:closure::NULL::(! gdbarch->displaced_step_free_closure) != (! gdbarch->displaced_step_copy_insn)
 686
 687 # Return the address of an appropriate place to put displaced
 688 # instructions while we step over them.  There need only be one such
 689 # place, since we're only stepping one thread over a breakpoint at a
 690 # time.
 691 #
 692 # For a general explanation of displaced stepping and how GDB uses it,
 693 # see the comments in infrun.c.
 694 m:CORE_ADDR:displaced_step_location:void:::NULL::(! gdbarch->displaced_step_location) != (! gdbarch->displaced_step_copy_insn)
 695
 696 # Refresh overlay mapped state for section OSECT.
 697 F:void:overlay_update:struct obj_section *osect:osect
 698
 699 M:const struct target_desc *:core_read_description:struct target_ops *target, bfd *abfd:target, abfd
 700
 701 # Handle special encoding of static variables in stabs debug info.
 702 F:char *:static_transform_name:char *name:name
 703 # Set if the address in N_SO or N_FUN stabs may be zero.
 704 v:int:sofun_address_maybe_missing:::0:0::0
 705
 706 # Parse the instruction at ADDR storing in the record execution log
 707 # the registers REGCACHE and memory ranges that will be affected when
 708 # the instruction executes, along with their current values.
 709 # Return -1 if something goes wrong, 0 otherwise.
 710 M:int:process_record:struct regcache *regcache, CORE_ADDR addr:regcache, addr
 711
 712 # Signal translation: translate inferior's signal (host's) number into
 713 # GDB's representation.
 714 m:enum target_signal:target_signal_from_host:int signo:signo::default_target_signal_from_host::0
 715 # Signal translation: translate GDB's signal number into inferior's host
 716 # signal number.
 717 m:int:target_signal_to_host:enum target_signal ts:ts::default_target_signal_to_host::0
 718
 719 # Extra signal info inspection.
 720 #
 721 # Return a type suitable to inspect extra signal information.
 722 M:struct type *:get_siginfo_type:void:
 723
 724 # Record architecture-specific information from the symbol table.
 725 M:void:record_special_symbol:struct objfile *objfile, asymbol *sym:objfile, sym
 726
 727 # Function for the 'catch syscall' feature.
 728
 729 # Get architecture-specific system calls information from registers.
 730 M:LONGEST:get_syscall_number:ptid_t ptid:ptid
 731
 732 # True if the list of shared libraries is one and only for all
 733 # processes, as opposed to a list of shared libraries per inferior.
 734 # This usually means that all processes, although may or may not share
 735 # an address space, will see the same set of symbols at the same
 736 # addresses.
 737 v:int:has_global_solist:::0:0::0
 738
 739 # On some targets, even though each inferior has its own private
 740 # address space, the debug interface takes care of making breakpoints
 741 # visible to all address spaces automatically.  For such cases,
 742 # this property should be set to true.
 743 v:int:has_global_breakpoints:::0:0::0
 744 EOF
 745 }
 746
 747 #
 748 # The .log file
 749 #
 750 exec > new-gdbarch.log
 751 function_list | while do_read
 752 do
 753     cat <<EOF
 754 ${class} ${returntype} ${function} ($formal)
 755 EOF
 756     for r in ${read}
 757     do
 758         eval echo \"\ \ \ \ ${r}=\${${r}}\"
 759     done
 760     if class_is_predicate_p && fallback_default_p
 761     then
 762         echo "Error: predicate function ${function} can not have a non- multi-arch default" 1>&2
 763         kill $$
 764         exit 1
 765     fi
 766     if [ "x${invalid_p}" = "x0" -a -n "${postdefault}" ]
 767     then
 768         echo "Error: postdefault is useless when invalid_p=0" 1>&2
 769         kill $$
 770         exit 1
 771     fi
 772     if class_is_multiarch_p
 773     then
 774         if class_is_predicate_p ; then :
 775         elif test "x${predefault}" = "x"
 776         then
 777             echo "Error: pure multi-arch function ${function} must have a predefault" 1>&2
 778             kill $$
 779             exit 1
 780         fi
 781     fi
 782     echo ""
 783 done
 784
 785 exec 1>&2
 786 compare_new gdbarch.log
 787
 788
 789 copyright ()
 790 {
 791 cat <<EOF
 792 /* *INDENT-OFF* */ /* THIS FILE IS GENERATED */
 793
 794 /* Dynamic architecture support for GDB, the GNU debugger.
 795
 796    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
 797    Free Software Foundation, Inc.
 798
 799    This file is part of GDB.
 800
 801    This program is free software; you can redistribute it and/or modify
 802    it under the terms of the GNU General Public License as published by
 803    the Free Software Foundation; either version 3 of the License, or
 804    (at your option) any later version.
 805
 806    This program is distributed in the hope that it will be useful,
 807    but WITHOUT ANY WARRANTY; without even the implied warranty of
 808    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 809    GNU General Public License for more details.
 810
 811    You should have received a copy of the GNU General Public License
 812    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 813
 814 /* This file was created with the aid of \`\`gdbarch.sh''.
 815
 816    The Bourne shell script \`\`gdbarch.sh'' creates the files
 817    \`\`new-gdbarch.c'' and \`\`new-gdbarch.h and then compares them
 818    against the existing \`\`gdbarch.[hc]''.  Any differences found
 819    being reported.
 820
 821    If editing this file, please also run gdbarch.sh and merge any
 822    changes into that script. Conversely, when making sweeping changes
 823    to this file, modifying gdbarch.sh and using its output may prove
 824    easier. */
 825
 826 EOF
 827 }
 828
 829 #
 830 # The .h file
 831 #
 832
 833 exec > new-gdbarch.h
 834 copyright
 835 cat <<EOF
 836 #ifndef GDBARCH_H
 837 #define GDBARCH_H
 838
 839 struct floatformat;
 840 struct ui_file;
 841 struct frame_info;
 842 struct value;
 843 struct objfile;
 844 struct obj_section;
 845 struct minimal_symbol;
 846 struct regcache;
 847 struct reggroup;
 848 struct regset;
 849 struct disassemble_info;
 850 struct target_ops;
 851 struct obstack;
 852 struct bp_target_info;
 853 struct target_desc;
 854 struct displaced_step_closure;
 855 struct core_regset_section;
 856 struct syscall;
 857
 858 /* The architecture associated with the connection to the target.
 859
 860    The architecture vector provides some information that is really
 861    a property of the target: The layout of certain packets, for instance;
 862    or the solib_ops vector.  Etc.  To differentiate architecture accesses
 863    to per-target properties from per-thread/per-frame/per-objfile properties,
 864    accesses to per-target properties should be made through target_gdbarch.
 865
 866    Eventually, when support for multiple targets is implemented in
 867    GDB, this global should be made target-specific.  */
 868 extern struct gdbarch *target_gdbarch;
 869 EOF
 870
 871 # function typedef's
 872 printf "\n"
 873 printf "\n"
 874 printf "/* The following are pre-initialized by GDBARCH. */\n"
 875 function_list | while do_read
 876 do
 877     if class_is_info_p
 878     then
 879         printf "\n"
 880         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 881         printf "/* set_gdbarch_${function}() - not applicable - pre-initialized. */\n"
 882     fi
 883 done
 884
 885 # function typedef's
 886 printf "\n"
 887 printf "\n"
 888 printf "/* The following are initialized by the target dependent code. */\n"
 889 function_list | while do_read
 890 do
 891     if [ -n "${comment}" ]
 892     then
 893         echo "${comment}" | sed \
 894             -e '2 s,#,/*,' \
 895             -e '3,$ s,#,  ,' \
 896             -e '$ s,$, */,'
 897     fi
 898
 899     if class_is_predicate_p
 900     then
 901         printf "\n"
 902         printf "extern int gdbarch_${function}_p (struct gdbarch *gdbarch);\n"
 903     fi
 904     if class_is_variable_p
 905     then
 906         printf "\n"
 907         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 908         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, ${returntype} ${function});\n"
 909     fi
 910     if class_is_function_p
 911     then
 912         printf "\n"
 913         if [ "x${formal}" = "xvoid" ] && class_is_multiarch_p
 914         then
 915             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch);\n"
 916         elif class_is_multiarch_p
 917         then
 918             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch, ${formal});\n"
 919         else
 920             printf "typedef ${returntype} (gdbarch_${function}_ftype) (${formal});\n"
 921         fi
 922         if [ "x${formal}" = "xvoid" ]
 923         then
 924           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 925         else
 926           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch, ${formal});\n"
 927         fi
 928         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, gdbarch_${function}_ftype *${function});\n"
 929     fi
 930 done
 931
 932 # close it off
 933 cat <<EOF
 934
 935 /* Definition for an unknown syscall, used basically in error-cases.  */
 936 #define UNKNOWN_SYSCALL (-1)
 937
 938 extern struct gdbarch_tdep *gdbarch_tdep (struct gdbarch *gdbarch);
 939
 940
 941 /* Mechanism for co-ordinating the selection of a specific
 942    architecture.
 943
 944    GDB targets (*-tdep.c) can register an interest in a specific
 945    architecture.  Other GDB components can register a need to maintain
 946    per-architecture data.
 947
 948    The mechanisms below ensures that there is only a loose connection
 949    between the set-architecture command and the various GDB
 950    components.  Each component can independently register their need
 951    to maintain architecture specific data with gdbarch.
 952
 953    Pragmatics:
 954
 955    Previously, a single TARGET_ARCHITECTURE_HOOK was provided.  It
 956    didn't scale.
 957
 958    The more traditional mega-struct containing architecture specific
 959    data for all the various GDB components was also considered.  Since
 960    GDB is built from a variable number of (fairly independent)
 961    components it was determined that the global aproach was not
 962    applicable. */
 963
 964
 965 /* Register a new architectural family with GDB.
 966
 967    Register support for the specified ARCHITECTURE with GDB.  When
 968    gdbarch determines that the specified architecture has been
 969    selected, the corresponding INIT function is called.
 970
 971    --
 972
 973    The INIT function takes two parameters: INFO which contains the
 974    information available to gdbarch about the (possibly new)
 975    architecture; ARCHES which is a list of the previously created
 976    \`\`struct gdbarch'' for this architecture.
 977
 978    The INFO parameter is, as far as possible, be pre-initialized with
 979    information obtained from INFO.ABFD or the global defaults.
 980
 981    The ARCHES parameter is a linked list (sorted most recently used)
 982    of all the previously created architures for this architecture
 983    family.  The (possibly NULL) ARCHES->gdbarch can used to access
 984    values from the previously selected architecture for this
 985    architecture family.
 986
 987    The INIT function shall return any of: NULL - indicating that it
 988    doesn't recognize the selected architecture; an existing \`\`struct
 989    gdbarch'' from the ARCHES list - indicating that the new
 990    architecture is just a synonym for an earlier architecture (see
 991    gdbarch_list_lookup_by_info()); a newly created \`\`struct gdbarch''
 992    - that describes the selected architecture (see gdbarch_alloc()).
 993
 994    The DUMP_TDEP function shall print out all target specific values.
 995    Care should be taken to ensure that the function works in both the
 996    multi-arch and non- multi-arch cases. */
 997
 998 struct gdbarch_list
 999 {
1000   struct gdbarch *gdbarch;
1001   struct gdbarch_list *next;
1002 };
1003
1004 struct gdbarch_info
1005 {
1006   /* Use default: NULL (ZERO). */
1007   const struct bfd_arch_info *bfd_arch_info;
1008
1009   /* Use default: BFD_ENDIAN_UNKNOWN (NB: is not ZERO).  */
1010   int byte_order;
1011
1012   int byte_order_for_code;
1013
1014   /* Use default: NULL (ZERO). */
1015   bfd *abfd;
1016
1017   /* Use default: NULL (ZERO). */
1018   struct gdbarch_tdep_info *tdep_info;
1019
1020   /* Use default: GDB_OSABI_UNINITIALIZED (-1).  */
1021   enum gdb_osabi osabi;
1022
1023   /* Use default: NULL (ZERO).  */
1024   const struct target_desc *target_desc;
1025 };
1026
1027 typedef struct gdbarch *(gdbarch_init_ftype) (struct gdbarch_info info, struct gdbarch_list *arches);
1028 typedef void (gdbarch_dump_tdep_ftype) (struct gdbarch *gdbarch, struct ui_file *file);
1029
1030 /* DEPRECATED - use gdbarch_register() */
1031 extern void register_gdbarch_init (enum bfd_architecture architecture, gdbarch_init_ftype *);
1032
1033 extern void gdbarch_register (enum bfd_architecture architecture,
1034                               gdbarch_init_ftype *,
1035                               gdbarch_dump_tdep_ftype *);
1036
1037
1038 /* Return a freshly allocated, NULL terminated, array of the valid
1039    architecture names.  Since architectures are registered during the
1040    _initialize phase this function only returns useful information
1041    once initialization has been completed. */
1042
1043 extern const char **gdbarch_printable_names (void);
1044
1045
1046 /* Helper function.  Search the list of ARCHES for a GDBARCH that
1047    matches the information provided by INFO. */
1048
1049 extern struct gdbarch_list *gdbarch_list_lookup_by_info (struct gdbarch_list *arches, const struct gdbarch_info *info);
1050
1051
1052 /* Helper function.  Create a preliminary \`\`struct gdbarch''.  Perform
1053    basic initialization using values obtained from the INFO and TDEP
1054    parameters.  set_gdbarch_*() functions are called to complete the
1055    initialization of the object. */
1056
1057 extern struct gdbarch *gdbarch_alloc (const struct gdbarch_info *info, struct gdbarch_tdep *tdep);
1058
1059
1060 /* Helper function.  Free a partially-constructed \`\`struct gdbarch''.
1061    It is assumed that the caller freeds the \`\`struct
1062    gdbarch_tdep''. */
1063
1064 extern void gdbarch_free (struct gdbarch *);
1065
1066
1067 /* Helper function.  Allocate memory from the \`\`struct gdbarch''
1068    obstack.  The memory is freed when the corresponding architecture
1069    is also freed.  */
1070
1071 extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
1072 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
1073 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
1074
1075
1076 /* Helper function. Force an update of the current architecture.
1077
1078    The actual architecture selected is determined by INFO, \`\`(gdb) set
1079    architecture'' et.al., the existing architecture and BFD's default
1080    architecture.  INFO should be initialized to zero and then selected
1081    fields should be updated.
1082
1083    Returns non-zero if the update succeeds */
1084
1085 extern int gdbarch_update_p (struct gdbarch_info info);
1086
1087
1088 /* Helper function.  Find an architecture matching info.
1089
1090    INFO should be initialized using gdbarch_info_init, relevant fields
1091    set, and then finished using gdbarch_info_fill.
1092
1093    Returns the corresponding architecture, or NULL if no matching
1094    architecture was found.  */
1095
1096 extern struct gdbarch *gdbarch_find_by_info (struct gdbarch_info info);
1097
1098
1099 /* Helper function.  Set the global "target_gdbarch" to "gdbarch".
1100
1101    FIXME: kettenis/20031124: Of the functions that follow, only
1102    gdbarch_from_bfd is supposed to survive.  The others will
1103    dissappear since in the future GDB will (hopefully) be truly
1104    multi-arch.  However, for now we're still stuck with the concept of
1105    a single active architecture.  */
1106
1107 extern void deprecated_target_gdbarch_select_hack (struct gdbarch *gdbarch);
1108
1109
1110 /* Register per-architecture data-pointer.
1111
1112    Reserve space for a per-architecture data-pointer.  An identifier
1113    for the reserved data-pointer is returned.  That identifer should
1114    be saved in a local static variable.
1115
1116    Memory for the per-architecture data shall be allocated using
1117    gdbarch_obstack_zalloc.  That memory will be deleted when the
1118    corresponding architecture object is deleted.
1119
1120    When a previously created architecture is re-selected, the
1121    per-architecture data-pointer for that previous architecture is
1122    restored.  INIT() is not re-called.
1123
1124    Multiple registrarants for any architecture are allowed (and
1125    strongly encouraged).  */
1126
1127 struct gdbarch_data;
1128
1129 typedef void *(gdbarch_data_pre_init_ftype) (struct obstack *obstack);
1130 extern struct gdbarch_data *gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *init);
1131 typedef void *(gdbarch_data_post_init_ftype) (struct gdbarch *gdbarch);
1132 extern struct gdbarch_data *gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *init);
1133 extern void deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1134                                          struct gdbarch_data *data,
1135                                          void *pointer);
1136
1137 extern void *gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *);
1138
1139
1140 /* Set the dynamic target-system-dependent parameters (architecture,
1141    byte-order, ...) using information found in the BFD */
1142
1143 extern void set_gdbarch_from_file (bfd *);
1144
1145
1146 /* Initialize the current architecture to the "first" one we find on
1147    our list.  */
1148
1149 extern void initialize_current_architecture (void);
1150
1151 /* gdbarch trace variable */
1152 extern int gdbarch_debug;
1153
1154 extern void gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file);
1155
1156 #endif
1157 EOF
1158 exec 1>&2
1159 #../move-if-change new-gdbarch.h gdbarch.h
1160 compare_new gdbarch.h
1161
1162
1163 #
1164 # C file
1165 #
1166
1167 exec > new-gdbarch.c
1168 copyright
1169 cat <<EOF
1170
1171 #include "defs.h"
1172 #include "arch-utils.h"
1173
1174 #include "gdbcmd.h"
1175 #include "inferior.h"
1176 #include "symcat.h"
1177
1178 #include "floatformat.h"
1179
1180 #include "gdb_assert.h"
1181 #include "gdb_string.h"
1182 #include "reggroups.h"
1183 #include "osabi.h"
1184 #include "gdb_obstack.h"
1185 #include "observer.h"
1186 #include "regcache.h"
1187
1188 /* Static function declarations */
1189
1190 static void alloc_gdbarch_data (struct gdbarch *);
1191
1192 /* Non-zero if we want to trace architecture code.  */
1193
1194 #ifndef GDBARCH_DEBUG
1195 #define GDBARCH_DEBUG 0
1196 #endif
1197 int gdbarch_debug = GDBARCH_DEBUG;
1198 static void
1199 show_gdbarch_debug (struct ui_file *file, int from_tty,
1200                     struct cmd_list_element *c, const char *value)
1201 {
1202   fprintf_filtered (file, _("Architecture debugging is %s.\\n"), value);
1203 }
1204
1205 static const char *
1206 pformat (const struct floatformat **format)
1207 {
1208   if (format == NULL)
1209     return "(null)";
1210   else
1211     /* Just print out one of them - this is only for diagnostics.  */
1212     return format[0]->name;
1213 }
1214
1215 EOF
1216
1217 # gdbarch open the gdbarch object
1218 printf "\n"
1219 printf "/* Maintain the struct gdbarch object */\n"
1220 printf "\n"
1221 printf "struct gdbarch\n"
1222 printf "{\n"
1223 printf "  /* Has this architecture been fully initialized?  */\n"
1224 printf "  int initialized_p;\n"
1225 printf "\n"
1226 printf "  /* An obstack bound to the lifetime of the architecture.  */\n"
1227 printf "  struct obstack *obstack;\n"
1228 printf "\n"
1229 printf "  /* basic architectural information */\n"
1230 function_list | while do_read
1231 do
1232     if class_is_info_p
1233     then
1234         printf "  ${returntype} ${function};\n"
1235     fi
1236 done
1237 printf "\n"
1238 printf "  /* target specific vector. */\n"
1239 printf "  struct gdbarch_tdep *tdep;\n"
1240 printf "  gdbarch_dump_tdep_ftype *dump_tdep;\n"
1241 printf "\n"
1242 printf "  /* per-architecture data-pointers */\n"
1243 printf "  unsigned nr_data;\n"
1244 printf "  void **data;\n"
1245 printf "\n"
1246 printf "  /* per-architecture swap-regions */\n"
1247 printf "  struct gdbarch_swap *swap;\n"
1248 printf "\n"
1249 cat <<EOF
1250   /* Multi-arch values.
1251
1252      When extending this structure you must:
1253
1254      Add the field below.
1255
1256      Declare set/get functions and define the corresponding
1257      macro in gdbarch.h.
1258
1259      gdbarch_alloc(): If zero/NULL is not a suitable default,
1260      initialize the new field.
1261
1262      verify_gdbarch(): Confirm that the target updated the field
1263      correctly.
1264
1265      gdbarch_dump(): Add a fprintf_unfiltered call so that the new
1266      field is dumped out
1267
1268      \`\`startup_gdbarch()'': Append an initial value to the static
1269      variable (base values on the host's c-type system).
1270
1271      get_gdbarch(): Implement the set/get functions (probably using
1272      the macro's as shortcuts).
1273
1274      */
1275
1276 EOF
1277 function_list | while do_read
1278 do
1279     if class_is_variable_p
1280     then
1281         printf "  ${returntype} ${function};\n"
1282     elif class_is_function_p
1283     then
1284         printf "  gdbarch_${function}_ftype *${function};\n"
1285     fi
1286 done
1287 printf "};\n"
1288
1289 # A pre-initialized vector
1290 printf "\n"
1291 printf "\n"
1292 cat <<EOF
1293 /* The default architecture uses host values (for want of a better
1294    choice). */
1295 EOF
1296 printf "\n"
1297 printf "extern const struct bfd_arch_info bfd_default_arch_struct;\n"
1298 printf "\n"
1299 printf "struct gdbarch startup_gdbarch =\n"
1300 printf "{\n"
1301 printf "  1, /* Always initialized.  */\n"
1302 printf "  NULL, /* The obstack.  */\n"
1303 printf "  /* basic architecture information */\n"
1304 function_list | while do_read
1305 do
1306     if class_is_info_p
1307     then
1308         printf "  ${staticdefault},  /* ${function} */\n"
1309     fi
1310 done
1311 cat <<EOF
1312   /* target specific vector and its dump routine */
1313   NULL, NULL,
1314   /*per-architecture data-pointers and swap regions */
1315   0, NULL, NULL,
1316   /* Multi-arch values */
1317 EOF
1318 function_list | while do_read
1319 do
1320     if class_is_function_p || class_is_variable_p
1321     then
1322         printf "  ${staticdefault},  /* ${function} */\n"
1323     fi
1324 done
1325 cat <<EOF
1326   /* startup_gdbarch() */
1327 };
1328
1329 struct gdbarch *target_gdbarch = &startup_gdbarch;
1330 EOF
1331
1332 # Create a new gdbarch struct
1333 cat <<EOF
1334
1335 /* Create a new \`\`struct gdbarch'' based on information provided by
1336    \`\`struct gdbarch_info''. */
1337 EOF
1338 printf "\n"
1339 cat <<EOF
1340 struct gdbarch *
1341 gdbarch_alloc (const struct gdbarch_info *info,
1342                struct gdbarch_tdep *tdep)
1343 {
1344   struct gdbarch *gdbarch;
1345
1346   /* Create an obstack for allocating all the per-architecture memory,
1347      then use that to allocate the architecture vector.  */
1348   struct obstack *obstack = XMALLOC (struct obstack);
1349   obstack_init (obstack);
1350   gdbarch = obstack_alloc (obstack, sizeof (*gdbarch));
1351   memset (gdbarch, 0, sizeof (*gdbarch));
1352   gdbarch->obstack = obstack;
1353
1354   alloc_gdbarch_data (gdbarch);
1355
1356   gdbarch->tdep = tdep;
1357 EOF
1358 printf "\n"
1359 function_list | while do_read
1360 do
1361     if class_is_info_p
1362     then
1363         printf "  gdbarch->${function} = info->${function};\n"
1364     fi
1365 done
1366 printf "\n"
1367 printf "  /* Force the explicit initialization of these. */\n"
1368 function_list | while do_read
1369 do
1370     if class_is_function_p || class_is_variable_p
1371     then
1372         if [ -n "${predefault}" -a "x${predefault}" != "x0" ]
1373         then
1374           printf "  gdbarch->${function} = ${predefault};\n"
1375         fi
1376     fi
1377 done
1378 cat <<EOF
1379   /* gdbarch_alloc() */
1380
1381   return gdbarch;
1382 }
1383 EOF
1384
1385 # Free a gdbarch struct.
1386 printf "\n"
1387 printf "\n"
1388 cat <<EOF
1389 /* Allocate extra space using the per-architecture obstack.  */
1390
1391 void *
1392 gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
1393 {
1394   void *data = obstack_alloc (arch->obstack, size);
1395   memset (data, 0, size);
1396   return data;
1397 }
1398
1399
1400 /* Free a gdbarch struct.  This should never happen in normal
1401    operation --- once you've created a gdbarch, you keep it around.
1402    However, if an architecture's init function encounters an error
1403    building the structure, it may need to clean up a partially
1404    constructed gdbarch.  */
1405
1406 void
1407 gdbarch_free (struct gdbarch *arch)
1408 {
1409   struct obstack *obstack;
1410   gdb_assert (arch != NULL);
1411   gdb_assert (!arch->initialized_p);
1412   obstack = arch->obstack;
1413   obstack_free (obstack, 0); /* Includes the ARCH.  */
1414   xfree (obstack);
1415 }
1416 EOF
1417
1418 # verify a new architecture
1419 cat <<EOF
1420
1421
1422 /* Ensure that all values in a GDBARCH are reasonable.  */
1423
1424 static void
1425 verify_gdbarch (struct gdbarch *gdbarch)
1426 {
1427   struct ui_file *log;
1428   struct cleanup *cleanups;
1429   long length;
1430   char *buf;
1431   log = mem_fileopen ();
1432   cleanups = make_cleanup_ui_file_delete (log);
1433   /* fundamental */
1434   if (gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)
1435     fprintf_unfiltered (log, "\n\tbyte-order");
1436   if (gdbarch->bfd_arch_info == NULL)
1437     fprintf_unfiltered (log, "\n\tbfd_arch_info");
1438   /* Check those that need to be defined for the given multi-arch level. */
1439 EOF
1440 function_list | while do_read
1441 do
1442     if class_is_function_p || class_is_variable_p
1443     then
1444         if [ "x${invalid_p}" = "x0" ]
1445         then
1446             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1447         elif class_is_predicate_p
1448         then
1449             printf "  /* Skip verify of ${function}, has predicate */\n"
1450         # FIXME: See do_read for potential simplification
1451         elif [ -n "${invalid_p}" -a -n "${postdefault}" ]
1452         then
1453             printf "  if (${invalid_p})\n"
1454             printf "    gdbarch->${function} = ${postdefault};\n"
1455         elif [ -n "${predefault}" -a -n "${postdefault}" ]
1456         then
1457             printf "  if (gdbarch->${function} == ${predefault})\n"
1458             printf "    gdbarch->${function} = ${postdefault};\n"
1459         elif [ -n "${postdefault}" ]
1460         then
1461             printf "  if (gdbarch->${function} == 0)\n"
1462             printf "    gdbarch->${function} = ${postdefault};\n"
1463         elif [ -n "${invalid_p}" ]
1464         then
1465             printf "  if (${invalid_p})\n"
1466             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1467         elif [ -n "${predefault}" ]
1468         then
1469             printf "  if (gdbarch->${function} == ${predefault})\n"
1470             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1471         fi
1472     fi
1473 done
1474 cat <<EOF
1475   buf = ui_file_xstrdup (log, &length);
1476   make_cleanup (xfree, buf);
1477   if (length > 0)
1478     internal_error (__FILE__, __LINE__,
1479                     _("verify_gdbarch: the following are invalid ...%s"),
1480                     buf);
1481   do_cleanups (cleanups);
1482 }
1483 EOF
1484
1485 # dump the structure
1486 printf "\n"
1487 printf "\n"
1488 cat <<EOF
1489 /* Print out the details of the current architecture. */
1490
1491 void
1492 gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
1493 {
1494   const char *gdb_nm_file = "<not-defined>";
1495 #if defined (GDB_NM_FILE)
1496   gdb_nm_file = GDB_NM_FILE;
1497 #endif
1498   fprintf_unfiltered (file,
1499                       "gdbarch_dump: GDB_NM_FILE = %s\\n",
1500                       gdb_nm_file);
1501 EOF
1502 function_list | sort -t: -k 3 | while do_read
1503 do
1504     # First the predicate
1505     if class_is_predicate_p
1506     then
1507         printf "  fprintf_unfiltered (file,\n"
1508         printf "                      \"gdbarch_dump: gdbarch_${function}_p() = %%d\\\\n\",\n"
1509         printf "                      gdbarch_${function}_p (gdbarch));\n"
1510     fi
1511     # Print the corresponding value.
1512     if class_is_function_p
1513     then
1514         printf "  fprintf_unfiltered (file,\n"
1515         printf "                      \"gdbarch_dump: ${function} = <%%s>\\\\n\",\n"
1516         printf "                      host_address_to_string (gdbarch->${function}));\n"
1517     else
1518         # It is a variable
1519         case "${print}:${returntype}" in
1520             :CORE_ADDR )
1521                 fmt="%s"
1522                 print="core_addr_to_string_nz (gdbarch->${function})"
1523                 ;;
1524             :* )
1525                 fmt="%s"
1526                 print="plongest (gdbarch->${function})"
1527                 ;;
1528             * )
1529                 fmt="%s"
1530                 ;;
1531         esac
1532         printf "  fprintf_unfiltered (file,\n"
1533         printf "                      \"gdbarch_dump: ${function} = %s\\\\n\",\n" "${fmt}"
1534         printf "                      ${print});\n"
1535     fi
1536 done
1537 cat <<EOF
1538   if (gdbarch->dump_tdep != NULL)
1539     gdbarch->dump_tdep (gdbarch, file);
1540 }
1541 EOF
1542
1543
1544 # GET/SET
1545 printf "\n"
1546 cat <<EOF
1547 struct gdbarch_tdep *
1548 gdbarch_tdep (struct gdbarch *gdbarch)
1549 {
1550   if (gdbarch_debug >= 2)
1551     fprintf_unfiltered (gdb_stdlog, "gdbarch_tdep called\\n");
1552   return gdbarch->tdep;
1553 }
1554 EOF
1555 printf "\n"
1556 function_list | while do_read
1557 do
1558     if class_is_predicate_p
1559     then
1560         printf "\n"
1561         printf "int\n"
1562         printf "gdbarch_${function}_p (struct gdbarch *gdbarch)\n"
1563         printf "{\n"
1564         printf "  gdb_assert (gdbarch != NULL);\n"
1565         printf "  return ${predicate};\n"
1566         printf "}\n"
1567     fi
1568     if class_is_function_p
1569     then
1570         printf "\n"
1571         printf "${returntype}\n"
1572         if [ "x${formal}" = "xvoid" ]
1573         then
1574           printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1575         else
1576           printf "gdbarch_${function} (struct gdbarch *gdbarch, ${formal})\n"
1577         fi
1578         printf "{\n"
1579         printf "  gdb_assert (gdbarch != NULL);\n"
1580         printf "  gdb_assert (gdbarch->${function} != NULL);\n"
1581         if class_is_predicate_p && test -n "${predefault}"
1582         then
1583             # Allow a call to a function with a predicate.
1584             printf "  /* Do not check predicate: ${predicate}, allow call.  */\n"
1585         fi
1586         printf "  if (gdbarch_debug >= 2)\n"
1587         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1588         if [ "x${actual}" = "x-" -o "x${actual}" = "x" ]
1589         then
1590             if class_is_multiarch_p
1591             then
1592                 params="gdbarch"
1593             else
1594                 params=""
1595             fi
1596         else
1597             if class_is_multiarch_p
1598             then
1599                 params="gdbarch, ${actual}"
1600             else
1601                 params="${actual}"
1602             fi
1603         fi
1604         if [ "x${returntype}" = "xvoid" ]
1605         then
1606           printf "  gdbarch->${function} (${params});\n"
1607         else
1608           printf "  return gdbarch->${function} (${params});\n"
1609         fi
1610         printf "}\n"
1611         printf "\n"
1612         printf "void\n"
1613         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1614         printf "            `echo ${function} | sed -e 's/./ /g'`  gdbarch_${function}_ftype ${function})\n"
1615         printf "{\n"
1616         printf "  gdbarch->${function} = ${function};\n"
1617         printf "}\n"
1618     elif class_is_variable_p
1619     then
1620         printf "\n"
1621         printf "${returntype}\n"
1622         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1623         printf "{\n"
1624         printf "  gdb_assert (gdbarch != NULL);\n"
1625         if [ "x${invalid_p}" = "x0" ]
1626         then
1627             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1628         elif [ -n "${invalid_p}" ]
1629         then
1630             printf "  /* Check variable is valid.  */\n"
1631             printf "  gdb_assert (!(${invalid_p}));\n"
1632         elif [ -n "${predefault}" ]
1633         then
1634             printf "  /* Check variable changed from pre-default.  */\n"
1635             printf "  gdb_assert (gdbarch->${function} != ${predefault});\n"
1636         fi
1637         printf "  if (gdbarch_debug >= 2)\n"
1638         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1639         printf "  return gdbarch->${function};\n"
1640         printf "}\n"
1641         printf "\n"
1642         printf "void\n"
1643         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1644         printf "            `echo ${function} | sed -e 's/./ /g'`  ${returntype} ${function})\n"
1645         printf "{\n"
1646         printf "  gdbarch->${function} = ${function};\n"
1647         printf "}\n"
1648     elif class_is_info_p
1649     then
1650         printf "\n"
1651         printf "${returntype}\n"
1652         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1653         printf "{\n"
1654         printf "  gdb_assert (gdbarch != NULL);\n"
1655         printf "  if (gdbarch_debug >= 2)\n"
1656         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1657         printf "  return gdbarch->${function};\n"
1658         printf "}\n"
1659     fi
1660 done
1661
1662 # All the trailing guff
1663 cat <<EOF
1664
1665
1666 /* Keep a registry of per-architecture data-pointers required by GDB
1667    modules. */
1668
1669 struct gdbarch_data
1670 {
1671   unsigned index;
1672   int init_p;
1673   gdbarch_data_pre_init_ftype *pre_init;
1674   gdbarch_data_post_init_ftype *post_init;
1675 };
1676
1677 struct gdbarch_data_registration
1678 {
1679   struct gdbarch_data *data;
1680   struct gdbarch_data_registration *next;
1681 };
1682
1683 struct gdbarch_data_registry
1684 {
1685   unsigned nr;
1686   struct gdbarch_data_registration *registrations;
1687 };
1688
1689 struct gdbarch_data_registry gdbarch_data_registry =
1690 {
1691   0, NULL,
1692 };
1693
1694 static struct gdbarch_data *
1695 gdbarch_data_register (gdbarch_data_pre_init_ftype *pre_init,
1696                        gdbarch_data_post_init_ftype *post_init)
1697 {
1698   struct gdbarch_data_registration **curr;
1699   /* Append the new registraration.  */
1700   for (curr = &gdbarch_data_registry.registrations;
1701        (*curr) != NULL;
1702        curr = &(*curr)->next);
1703   (*curr) = XMALLOC (struct gdbarch_data_registration);
1704   (*curr)->next = NULL;
1705   (*curr)->data = XMALLOC (struct gdbarch_data);
1706   (*curr)->data->index = gdbarch_data_registry.nr++;
1707   (*curr)->data->pre_init = pre_init;
1708   (*curr)->data->post_init = post_init;
1709   (*curr)->data->init_p = 1;
1710   return (*curr)->data;
1711 }
1712
1713 struct gdbarch_data *
1714 gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *pre_init)
1715 {
1716   return gdbarch_data_register (pre_init, NULL);
1717 }
1718
1719 struct gdbarch_data *
1720 gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *post_init)
1721 {
1722   return gdbarch_data_register (NULL, post_init);
1723 }
1724
1725 /* Create/delete the gdbarch data vector. */
1726
1727 static void
1728 alloc_gdbarch_data (struct gdbarch *gdbarch)
1729 {
1730   gdb_assert (gdbarch->data == NULL);
1731   gdbarch->nr_data = gdbarch_data_registry.nr;
1732   gdbarch->data = GDBARCH_OBSTACK_CALLOC (gdbarch, gdbarch->nr_data, void *);
1733 }
1734
1735 /* Initialize the current value of the specified per-architecture
1736    data-pointer. */
1737
1738 void
1739 deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1740                              struct gdbarch_data *data,
1741                              void *pointer)
1742 {
1743   gdb_assert (data->index < gdbarch->nr_data);
1744   gdb_assert (gdbarch->data[data->index] == NULL);
1745   gdb_assert (data->pre_init == NULL);
1746   gdbarch->data[data->index] = pointer;
1747 }
1748
1749 /* Return the current value of the specified per-architecture
1750    data-pointer. */
1751
1752 void *
1753 gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *data)
1754 {
1755   gdb_assert (data->index < gdbarch->nr_data);
1756   if (gdbarch->data[data->index] == NULL)
1757     {
1758       /* The data-pointer isn't initialized, call init() to get a
1759          value.  */
1760       if (data->pre_init != NULL)
1761         /* Mid architecture creation: pass just the obstack, and not
1762            the entire architecture, as that way it isn't possible for
1763            pre-init code to refer to undefined architecture
1764            fields.  */
1765         gdbarch->data[data->index] = data->pre_init (gdbarch->obstack);
1766       else if (gdbarch->initialized_p
1767                && data->post_init != NULL)
1768         /* Post architecture creation: pass the entire architecture
1769            (as all fields are valid), but be careful to also detect
1770            recursive references.  */
1771         {
1772           gdb_assert (data->init_p);
1773           data->init_p = 0;
1774           gdbarch->data[data->index] = data->post_init (gdbarch);
1775           data->init_p = 1;
1776         }
1777       else
1778         /* The architecture initialization hasn't completed - punt -
1779          hope that the caller knows what they are doing.  Once
1780          deprecated_set_gdbarch_data has been initialized, this can be
1781          changed to an internal error.  */
1782         return NULL;
1783       gdb_assert (gdbarch->data[data->index] != NULL);
1784     }
1785   return gdbarch->data[data->index];
1786 }
1787
1788
1789 /* Keep a registry of the architectures known by GDB. */
1790
1791 struct gdbarch_registration
1792 {
1793   enum bfd_architecture bfd_architecture;
1794   gdbarch_init_ftype *init;
1795   gdbarch_dump_tdep_ftype *dump_tdep;
1796   struct gdbarch_list *arches;
1797   struct gdbarch_registration *next;
1798 };
1799
1800 static struct gdbarch_registration *gdbarch_registry = NULL;
1801
1802 static void
1803 append_name (const char ***buf, int *nr, const char *name)
1804 {
1805   *buf = xrealloc (*buf, sizeof (char**) * (*nr + 1));
1806   (*buf)[*nr] = name;
1807   *nr += 1;
1808 }
1809
1810 const char **
1811 gdbarch_printable_names (void)
1812 {
1813   /* Accumulate a list of names based on the registed list of
1814      architectures. */
1815   enum bfd_architecture a;
1816   int nr_arches = 0;
1817   const char **arches = NULL;
1818   struct gdbarch_registration *rego;
1819   for (rego = gdbarch_registry;
1820        rego != NULL;
1821        rego = rego->next)
1822     {
1823       const struct bfd_arch_info *ap;
1824       ap = bfd_lookup_arch (rego->bfd_architecture, 0);
1825       if (ap == NULL)
1826         internal_error (__FILE__, __LINE__,
1827                         _("gdbarch_architecture_names: multi-arch unknown"));
1828       do
1829         {
1830           append_name (&arches, &nr_arches, ap->printable_name);
1831           ap = ap->next;
1832         }
1833       while (ap != NULL);
1834     }
1835   append_name (&arches, &nr_arches, NULL);
1836   return arches;
1837 }
1838
1839
1840 void
1841 gdbarch_register (enum bfd_architecture bfd_architecture,
1842                   gdbarch_init_ftype *init,
1843                   gdbarch_dump_tdep_ftype *dump_tdep)
1844 {
1845   struct gdbarch_registration **curr;
1846   const struct bfd_arch_info *bfd_arch_info;
1847   /* Check that BFD recognizes this architecture */
1848   bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0);
1849   if (bfd_arch_info == NULL)
1850     {
1851       internal_error (__FILE__, __LINE__,
1852                       _("gdbarch: Attempt to register unknown architecture (%d)"),
1853                       bfd_architecture);
1854     }
1855   /* Check that we haven't seen this architecture before */
1856   for (curr = &gdbarch_registry;
1857        (*curr) != NULL;
1858        curr = &(*curr)->next)
1859     {
1860       if (bfd_architecture == (*curr)->bfd_architecture)
1861         internal_error (__FILE__, __LINE__,
1862                         _("gdbarch: Duplicate registraration of architecture (%s)"),
1863                         bfd_arch_info->printable_name);
1864     }
1865   /* log it */
1866   if (gdbarch_debug)
1867     fprintf_unfiltered (gdb_stdlog, "register_gdbarch_init (%s, %s)\n",
1868                         bfd_arch_info->printable_name,
1869                         host_address_to_string (init));
1870   /* Append it */
1871   (*curr) = XMALLOC (struct gdbarch_registration);
1872   (*curr)->bfd_architecture = bfd_architecture;
1873   (*curr)->init = init;
1874   (*curr)->dump_tdep = dump_tdep;
1875   (*curr)->arches = NULL;
1876   (*curr)->next = NULL;
1877 }
1878
1879 void
1880 register_gdbarch_init (enum bfd_architecture bfd_architecture,
1881                        gdbarch_init_ftype *init)
1882 {
1883   gdbarch_register (bfd_architecture, init, NULL);
1884 }
1885
1886
1887 /* Look for an architecture using gdbarch_info.  */
1888
1889 struct gdbarch_list *
1890 gdbarch_list_lookup_by_info (struct gdbarch_list *arches,
1891                              const struct gdbarch_info *info)
1892 {
1893   for (; arches != NULL; arches = arches->next)
1894     {
1895       if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info)
1896         continue;
1897       if (info->byte_order != arches->gdbarch->byte_order)
1898         continue;
1899       if (info->osabi != arches->gdbarch->osabi)
1900         continue;
1901       if (info->target_desc != arches->gdbarch->target_desc)
1902         continue;
1903       return arches;
1904     }
1905   return NULL;
1906 }
1907
1908
1909 /* Find an architecture that matches the specified INFO.  Create a new
1910    architecture if needed.  Return that new architecture.  */
1911
1912 struct gdbarch *
1913 gdbarch_find_by_info (struct gdbarch_info info)
1914 {
1915   struct gdbarch *new_gdbarch;
1916   struct gdbarch_registration *rego;
1917
1918   /* Fill in missing parts of the INFO struct using a number of
1919      sources: "set ..."; INFOabfd supplied; and the global
1920      defaults.  */
1921   gdbarch_info_fill (&info);
1922
1923   /* Must have found some sort of architecture. */
1924   gdb_assert (info.bfd_arch_info != NULL);
1925
1926   if (gdbarch_debug)
1927     {
1928       fprintf_unfiltered (gdb_stdlog,
1929                           "gdbarch_find_by_info: info.bfd_arch_info %s\n",
1930                           (info.bfd_arch_info != NULL
1931                            ? info.bfd_arch_info->printable_name
1932                            : "(null)"));
1933       fprintf_unfiltered (gdb_stdlog,
1934                           "gdbarch_find_by_info: info.byte_order %d (%s)\n",
1935                           info.byte_order,
1936                           (info.byte_order == BFD_ENDIAN_BIG ? "big"
1937                            : info.byte_order == BFD_ENDIAN_LITTLE ? "little"
1938                            : "default"));
1939       fprintf_unfiltered (gdb_stdlog,
1940                           "gdbarch_find_by_info: info.osabi %d (%s)\n",
1941                           info.osabi, gdbarch_osabi_name (info.osabi));
1942       fprintf_unfiltered (gdb_stdlog,
1943                           "gdbarch_find_by_info: info.abfd %s\n",
1944                           host_address_to_string (info.abfd));
1945       fprintf_unfiltered (gdb_stdlog,
1946                           "gdbarch_find_by_info: info.tdep_info %s\n",
1947                           host_address_to_string (info.tdep_info));
1948     }
1949
1950   /* Find the tdep code that knows about this architecture.  */
1951   for (rego = gdbarch_registry;
1952        rego != NULL;
1953        rego = rego->next)
1954     if (rego->bfd_architecture == info.bfd_arch_info->arch)
1955       break;
1956   if (rego == NULL)
1957     {
1958       if (gdbarch_debug)
1959         fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
1960                             "No matching architecture\n");
1961       return 0;
1962     }
1963
1964   /* Ask the tdep code for an architecture that matches "info".  */
1965   new_gdbarch = rego->init (info, rego->arches);
1966
1967   /* Did the tdep code like it?  No.  Reject the change and revert to
1968      the old architecture.  */
1969   if (new_gdbarch == NULL)
1970     {
1971       if (gdbarch_debug)
1972         fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
1973                             "Target rejected architecture\n");
1974       return NULL;
1975     }
1976
1977   /* Is this a pre-existing architecture (as determined by already
1978      being initialized)?  Move it to the front of the architecture
1979      list (keeping the list sorted Most Recently Used).  */
1980   if (new_gdbarch->initialized_p)
1981     {
1982       struct gdbarch_list **list;
1983       struct gdbarch_list *this;
1984       if (gdbarch_debug)
1985         fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
1986                             "Previous architecture %s (%s) selected\n",
1987                             host_address_to_string (new_gdbarch),
1988                             new_gdbarch->bfd_arch_info->printable_name);
1989       /* Find the existing arch in the list.  */
1990       for (list = &rego->arches;
1991            (*list) != NULL && (*list)->gdbarch != new_gdbarch;
1992            list = &(*list)->next);
1993       /* It had better be in the list of architectures.  */
1994       gdb_assert ((*list) != NULL && (*list)->gdbarch == new_gdbarch);
1995       /* Unlink THIS.  */
1996       this = (*list);
1997       (*list) = this->next;
1998       /* Insert THIS at the front.  */
1999       this->next = rego->arches;
2000       rego->arches = this;
2001       /* Return it.  */
2002       return new_gdbarch;
2003     }
2004
2005   /* It's a new architecture.  */
2006   if (gdbarch_debug)
2007     fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
2008                         "New architecture %s (%s) selected\n",
2009                         host_address_to_string (new_gdbarch),
2010                         new_gdbarch->bfd_arch_info->printable_name);
2011
2012   /* Insert the new architecture into the front of the architecture
2013      list (keep the list sorted Most Recently Used).  */
2014   {
2015     struct gdbarch_list *this = XMALLOC (struct gdbarch_list);
2016     this->next = rego->arches;
2017     this->gdbarch = new_gdbarch;
2018     rego->arches = this;
2019   }
2020
2021   /* Check that the newly installed architecture is valid.  Plug in
2022      any post init values.  */
2023   new_gdbarch->dump_tdep = rego->dump_tdep;
2024   verify_gdbarch (new_gdbarch);
2025   new_gdbarch->initialized_p = 1;
2026
2027   if (gdbarch_debug)
2028     gdbarch_dump (new_gdbarch, gdb_stdlog);
2029
2030   return new_gdbarch;
2031 }
2032
2033 /* Make the specified architecture current.  */
2034
2035 void
2036 deprecated_target_gdbarch_select_hack (struct gdbarch *new_gdbarch)
2037 {
2038   gdb_assert (new_gdbarch != NULL);
2039   gdb_assert (new_gdbarch->initialized_p);
2040   target_gdbarch = new_gdbarch;
2041   observer_notify_architecture_changed (new_gdbarch);
2042   registers_changed ();
2043 }
2044
2045 extern void _initialize_gdbarch (void);
2046
2047 void
2048 _initialize_gdbarch (void)
2049 {
2050   struct cmd_list_element *c;
2051
2052   add_setshow_zinteger_cmd ("arch", class_maintenance, &gdbarch_debug, _("\\
2053 Set architecture debugging."), _("\\
2054 Show architecture debugging."), _("\\
2055 When non-zero, architecture debugging is enabled."),
2056                             NULL,
2057                             show_gdbarch_debug,
2058                             &setdebuglist, &showdebuglist);
2059 }
2060 EOF
2061
2062 # close things off
2063 exec 1>&2
2064 #../move-if-change new-gdbarch.c gdbarch.c
2065 compare_new gdbarch.c