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 # True if the list of shared libraries is one and only for all
 728 # processes, as opposed to a list of shared libraries per inferior.
 729 # This usually means that all processes, although may or may not share
 730 # an address space, will see the same set of symbols at the same
 731 # addresses.
 732 v:int:has_global_solist:::0:0::0
 733
 734 # On some targets, even though each inferior has its own private
 735 # address space, the debug interface takes care of making breakpoints
 736 # visible to all address spaces automatically.  For such cases,
 737 # this property should be set to true.
 738 v:int:has_global_breakpoints:::0:0::0
 739 EOF
 740 }
 741
 742 #
 743 # The .log file
 744 #
 745 exec > new-gdbarch.log
 746 function_list | while do_read
 747 do
 748     cat <<EOF
 749 ${class} ${returntype} ${function} ($formal)
 750 EOF
 751     for r in ${read}
 752     do
 753         eval echo \"\ \ \ \ ${r}=\${${r}}\"
 754     done
 755     if class_is_predicate_p && fallback_default_p
 756     then
 757         echo "Error: predicate function ${function} can not have a non- multi-arch default" 1>&2
 758         kill $$
 759         exit 1
 760     fi
 761     if [ "x${invalid_p}" = "x0" -a -n "${postdefault}" ]
 762     then
 763         echo "Error: postdefault is useless when invalid_p=0" 1>&2
 764         kill $$
 765         exit 1
 766     fi
 767     if class_is_multiarch_p
 768     then
 769         if class_is_predicate_p ; then :
 770         elif test "x${predefault}" = "x"
 771         then
 772             echo "Error: pure multi-arch function ${function} must have a predefault" 1>&2
 773             kill $$
 774             exit 1
 775         fi
 776     fi
 777     echo ""
 778 done
 779
 780 exec 1>&2
 781 compare_new gdbarch.log
 782
 783
 784 copyright ()
 785 {
 786 cat <<EOF
 787 /* *INDENT-OFF* */ /* THIS FILE IS GENERATED */
 788
 789 /* Dynamic architecture support for GDB, the GNU debugger.
 790
 791    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
 792    Free Software Foundation, Inc.
 793
 794    This file is part of GDB.
 795
 796    This program is free software; you can redistribute it and/or modify
 797    it under the terms of the GNU General Public License as published by
 798    the Free Software Foundation; either version 3 of the License, or
 799    (at your option) any later version.
 800
 801    This program is distributed in the hope that it will be useful,
 802    but WITHOUT ANY WARRANTY; without even the implied warranty of
 803    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 804    GNU General Public License for more details.
 805
 806    You should have received a copy of the GNU General Public License
 807    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 808
 809 /* This file was created with the aid of \`\`gdbarch.sh''.
 810
 811    The Bourne shell script \`\`gdbarch.sh'' creates the files
 812    \`\`new-gdbarch.c'' and \`\`new-gdbarch.h and then compares them
 813    against the existing \`\`gdbarch.[hc]''.  Any differences found
 814    being reported.
 815
 816    If editing this file, please also run gdbarch.sh and merge any
 817    changes into that script. Conversely, when making sweeping changes
 818    to this file, modifying gdbarch.sh and using its output may prove
 819    easier. */
 820
 821 EOF
 822 }
 823
 824 #
 825 # The .h file
 826 #
 827
 828 exec > new-gdbarch.h
 829 copyright
 830 cat <<EOF
 831 #ifndef GDBARCH_H
 832 #define GDBARCH_H
 833
 834 struct floatformat;
 835 struct ui_file;
 836 struct frame_info;
 837 struct value;
 838 struct objfile;
 839 struct obj_section;
 840 struct minimal_symbol;
 841 struct regcache;
 842 struct reggroup;
 843 struct regset;
 844 struct disassemble_info;
 845 struct target_ops;
 846 struct obstack;
 847 struct bp_target_info;
 848 struct target_desc;
 849 struct displaced_step_closure;
 850 struct core_regset_section;
 851
 852 /* The architecture associated with the connection to the target.
 853
 854    The architecture vector provides some information that is really
 855    a property of the target: The layout of certain packets, for instance;
 856    or the solib_ops vector.  Etc.  To differentiate architecture accesses
 857    to per-target properties from per-thread/per-frame/per-objfile properties,
 858    accesses to per-target properties should be made through target_gdbarch.
 859
 860    Eventually, when support for multiple targets is implemented in
 861    GDB, this global should be made target-specific.  */
 862 extern struct gdbarch *target_gdbarch;
 863 EOF
 864
 865 # function typedef's
 866 printf "\n"
 867 printf "\n"
 868 printf "/* The following are pre-initialized by GDBARCH. */\n"
 869 function_list | while do_read
 870 do
 871     if class_is_info_p
 872     then
 873         printf "\n"
 874         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 875         printf "/* set_gdbarch_${function}() - not applicable - pre-initialized. */\n"
 876     fi
 877 done
 878
 879 # function typedef's
 880 printf "\n"
 881 printf "\n"
 882 printf "/* The following are initialized by the target dependent code. */\n"
 883 function_list | while do_read
 884 do
 885     if [ -n "${comment}" ]
 886     then
 887         echo "${comment}" | sed \
 888             -e '2 s,#,/*,' \
 889             -e '3,$ s,#,  ,' \
 890             -e '$ s,$, */,'
 891     fi
 892
 893     if class_is_predicate_p
 894     then
 895         printf "\n"
 896         printf "extern int gdbarch_${function}_p (struct gdbarch *gdbarch);\n"
 897     fi
 898     if class_is_variable_p
 899     then
 900         printf "\n"
 901         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 902         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, ${returntype} ${function});\n"
 903     fi
 904     if class_is_function_p
 905     then
 906         printf "\n"
 907         if [ "x${formal}" = "xvoid" ] && class_is_multiarch_p
 908         then
 909             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch);\n"
 910         elif class_is_multiarch_p
 911         then
 912             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch, ${formal});\n"
 913         else
 914             printf "typedef ${returntype} (gdbarch_${function}_ftype) (${formal});\n"
 915         fi
 916         if [ "x${formal}" = "xvoid" ]
 917         then
 918           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 919         else
 920           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch, ${formal});\n"
 921         fi
 922         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, gdbarch_${function}_ftype *${function});\n"
 923     fi
 924 done
 925
 926 # close it off
 927 cat <<EOF
 928
 929 extern struct gdbarch_tdep *gdbarch_tdep (struct gdbarch *gdbarch);
 930
 931
 932 /* Mechanism for co-ordinating the selection of a specific
 933    architecture.
 934
 935    GDB targets (*-tdep.c) can register an interest in a specific
 936    architecture.  Other GDB components can register a need to maintain
 937    per-architecture data.
 938
 939    The mechanisms below ensures that there is only a loose connection
 940    between the set-architecture command and the various GDB
 941    components.  Each component can independently register their need
 942    to maintain architecture specific data with gdbarch.
 943
 944    Pragmatics:
 945
 946    Previously, a single TARGET_ARCHITECTURE_HOOK was provided.  It
 947    didn't scale.
 948
 949    The more traditional mega-struct containing architecture specific
 950    data for all the various GDB components was also considered.  Since
 951    GDB is built from a variable number of (fairly independent)
 952    components it was determined that the global aproach was not
 953    applicable. */
 954
 955
 956 /* Register a new architectural family with GDB.
 957
 958    Register support for the specified ARCHITECTURE with GDB.  When
 959    gdbarch determines that the specified architecture has been
 960    selected, the corresponding INIT function is called.
 961
 962    --
 963
 964    The INIT function takes two parameters: INFO which contains the
 965    information available to gdbarch about the (possibly new)
 966    architecture; ARCHES which is a list of the previously created
 967    \`\`struct gdbarch'' for this architecture.
 968
 969    The INFO parameter is, as far as possible, be pre-initialized with
 970    information obtained from INFO.ABFD or the global defaults.
 971
 972    The ARCHES parameter is a linked list (sorted most recently used)
 973    of all the previously created architures for this architecture
 974    family.  The (possibly NULL) ARCHES->gdbarch can used to access
 975    values from the previously selected architecture for this
 976    architecture family.
 977
 978    The INIT function shall return any of: NULL - indicating that it
 979    doesn't recognize the selected architecture; an existing \`\`struct
 980    gdbarch'' from the ARCHES list - indicating that the new
 981    architecture is just a synonym for an earlier architecture (see
 982    gdbarch_list_lookup_by_info()); a newly created \`\`struct gdbarch''
 983    - that describes the selected architecture (see gdbarch_alloc()).
 984
 985    The DUMP_TDEP function shall print out all target specific values.
 986    Care should be taken to ensure that the function works in both the
 987    multi-arch and non- multi-arch cases. */
 988
 989 struct gdbarch_list
 990 {
 991   struct gdbarch *gdbarch;
 992   struct gdbarch_list *next;
 993 };
 994
 995 struct gdbarch_info
 996 {
 997   /* Use default: NULL (ZERO). */
 998   const struct bfd_arch_info *bfd_arch_info;
 999
1000   /* Use default: BFD_ENDIAN_UNKNOWN (NB: is not ZERO).  */
1001   int byte_order;
1002
1003   int byte_order_for_code;
1004
1005   /* Use default: NULL (ZERO). */
1006   bfd *abfd;
1007
1008   /* Use default: NULL (ZERO). */
1009   struct gdbarch_tdep_info *tdep_info;
1010
1011   /* Use default: GDB_OSABI_UNINITIALIZED (-1).  */
1012   enum gdb_osabi osabi;
1013
1014   /* Use default: NULL (ZERO).  */
1015   const struct target_desc *target_desc;
1016 };
1017
1018 typedef struct gdbarch *(gdbarch_init_ftype) (struct gdbarch_info info, struct gdbarch_list *arches);
1019 typedef void (gdbarch_dump_tdep_ftype) (struct gdbarch *gdbarch, struct ui_file *file);
1020
1021 /* DEPRECATED - use gdbarch_register() */
1022 extern void register_gdbarch_init (enum bfd_architecture architecture, gdbarch_init_ftype *);
1023
1024 extern void gdbarch_register (enum bfd_architecture architecture,
1025                               gdbarch_init_ftype *,
1026                               gdbarch_dump_tdep_ftype *);
1027
1028
1029 /* Return a freshly allocated, NULL terminated, array of the valid
1030    architecture names.  Since architectures are registered during the
1031    _initialize phase this function only returns useful information
1032    once initialization has been completed. */
1033
1034 extern const char **gdbarch_printable_names (void);
1035
1036
1037 /* Helper function.  Search the list of ARCHES for a GDBARCH that
1038    matches the information provided by INFO. */
1039
1040 extern struct gdbarch_list *gdbarch_list_lookup_by_info (struct gdbarch_list *arches, const struct gdbarch_info *info);
1041
1042
1043 /* Helper function.  Create a preliminary \`\`struct gdbarch''.  Perform
1044    basic initialization using values obtained from the INFO and TDEP
1045    parameters.  set_gdbarch_*() functions are called to complete the
1046    initialization of the object. */
1047
1048 extern struct gdbarch *gdbarch_alloc (const struct gdbarch_info *info, struct gdbarch_tdep *tdep);
1049
1050
1051 /* Helper function.  Free a partially-constructed \`\`struct gdbarch''.
1052    It is assumed that the caller freeds the \`\`struct
1053    gdbarch_tdep''. */
1054
1055 extern void gdbarch_free (struct gdbarch *);
1056
1057
1058 /* Helper function.  Allocate memory from the \`\`struct gdbarch''
1059    obstack.  The memory is freed when the corresponding architecture
1060    is also freed.  */
1061
1062 extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
1063 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
1064 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
1065
1066
1067 /* Helper function. Force an update of the current architecture.
1068
1069    The actual architecture selected is determined by INFO, \`\`(gdb) set
1070    architecture'' et.al., the existing architecture and BFD's default
1071    architecture.  INFO should be initialized to zero and then selected
1072    fields should be updated.
1073
1074    Returns non-zero if the update succeeds */
1075
1076 extern int gdbarch_update_p (struct gdbarch_info info);
1077
1078
1079 /* Helper function.  Find an architecture matching info.
1080
1081    INFO should be initialized using gdbarch_info_init, relevant fields
1082    set, and then finished using gdbarch_info_fill.
1083
1084    Returns the corresponding architecture, or NULL if no matching
1085    architecture was found.  */
1086
1087 extern struct gdbarch *gdbarch_find_by_info (struct gdbarch_info info);
1088
1089
1090 /* Helper function.  Set the global "target_gdbarch" to "gdbarch".
1091
1092    FIXME: kettenis/20031124: Of the functions that follow, only
1093    gdbarch_from_bfd is supposed to survive.  The others will
1094    dissappear since in the future GDB will (hopefully) be truly
1095    multi-arch.  However, for now we're still stuck with the concept of
1096    a single active architecture.  */
1097
1098 extern void deprecated_target_gdbarch_select_hack (struct gdbarch *gdbarch);
1099
1100
1101 /* Register per-architecture data-pointer.
1102
1103    Reserve space for a per-architecture data-pointer.  An identifier
1104    for the reserved data-pointer is returned.  That identifer should
1105    be saved in a local static variable.
1106
1107    Memory for the per-architecture data shall be allocated using
1108    gdbarch_obstack_zalloc.  That memory will be deleted when the
1109    corresponding architecture object is deleted.
1110
1111    When a previously created architecture is re-selected, the
1112    per-architecture data-pointer for that previous architecture is
1113    restored.  INIT() is not re-called.
1114
1115    Multiple registrarants for any architecture are allowed (and
1116    strongly encouraged).  */
1117
1118 struct gdbarch_data;
1119
1120 typedef void *(gdbarch_data_pre_init_ftype) (struct obstack *obstack);
1121 extern struct gdbarch_data *gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *init);
1122 typedef void *(gdbarch_data_post_init_ftype) (struct gdbarch *gdbarch);
1123 extern struct gdbarch_data *gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *init);
1124 extern void deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1125                                          struct gdbarch_data *data,
1126                                          void *pointer);
1127
1128 extern void *gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *);
1129
1130
1131 /* Set the dynamic target-system-dependent parameters (architecture,
1132    byte-order, ...) using information found in the BFD */
1133
1134 extern void set_gdbarch_from_file (bfd *);
1135
1136
1137 /* Initialize the current architecture to the "first" one we find on
1138    our list.  */
1139
1140 extern void initialize_current_architecture (void);
1141
1142 /* gdbarch trace variable */
1143 extern int gdbarch_debug;
1144
1145 extern void gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file);
1146
1147 #endif
1148 EOF
1149 exec 1>&2
1150 #../move-if-change new-gdbarch.h gdbarch.h
1151 compare_new gdbarch.h
1152
1153
1154 #
1155 # C file
1156 #
1157
1158 exec > new-gdbarch.c
1159 copyright
1160 cat <<EOF
1161
1162 #include "defs.h"
1163 #include "arch-utils.h"
1164
1165 #include "gdbcmd.h"
1166 #include "inferior.h"
1167 #include "symcat.h"
1168
1169 #include "floatformat.h"
1170
1171 #include "gdb_assert.h"
1172 #include "gdb_string.h"
1173 #include "reggroups.h"
1174 #include "osabi.h"
1175 #include "gdb_obstack.h"
1176 #include "observer.h"
1177 #include "regcache.h"
1178
1179 /* Static function declarations */
1180
1181 static void alloc_gdbarch_data (struct gdbarch *);
1182
1183 /* Non-zero if we want to trace architecture code.  */
1184
1185 #ifndef GDBARCH_DEBUG
1186 #define GDBARCH_DEBUG 0
1187 #endif
1188 int gdbarch_debug = GDBARCH_DEBUG;
1189 static void
1190 show_gdbarch_debug (struct ui_file *file, int from_tty,
1191                     struct cmd_list_element *c, const char *value)
1192 {
1193   fprintf_filtered (file, _("Architecture debugging is %s.\\n"), value);
1194 }
1195
1196 static const char *
1197 pformat (const struct floatformat **format)
1198 {
1199   if (format == NULL)
1200     return "(null)";
1201   else
1202     /* Just print out one of them - this is only for diagnostics.  */
1203     return format[0]->name;
1204 }
1205
1206 EOF
1207
1208 # gdbarch open the gdbarch object
1209 printf "\n"
1210 printf "/* Maintain the struct gdbarch object */\n"
1211 printf "\n"
1212 printf "struct gdbarch\n"
1213 printf "{\n"
1214 printf "  /* Has this architecture been fully initialized?  */\n"
1215 printf "  int initialized_p;\n"
1216 printf "\n"
1217 printf "  /* An obstack bound to the lifetime of the architecture.  */\n"
1218 printf "  struct obstack *obstack;\n"
1219 printf "\n"
1220 printf "  /* basic architectural information */\n"
1221 function_list | while do_read
1222 do
1223     if class_is_info_p
1224     then
1225         printf "  ${returntype} ${function};\n"
1226     fi
1227 done
1228 printf "\n"
1229 printf "  /* target specific vector. */\n"
1230 printf "  struct gdbarch_tdep *tdep;\n"
1231 printf "  gdbarch_dump_tdep_ftype *dump_tdep;\n"
1232 printf "\n"
1233 printf "  /* per-architecture data-pointers */\n"
1234 printf "  unsigned nr_data;\n"
1235 printf "  void **data;\n"
1236 printf "\n"
1237 printf "  /* per-architecture swap-regions */\n"
1238 printf "  struct gdbarch_swap *swap;\n"
1239 printf "\n"
1240 cat <<EOF
1241   /* Multi-arch values.
1242
1243      When extending this structure you must:
1244
1245      Add the field below.
1246
1247      Declare set/get functions and define the corresponding
1248      macro in gdbarch.h.
1249
1250      gdbarch_alloc(): If zero/NULL is not a suitable default,
1251      initialize the new field.
1252
1253      verify_gdbarch(): Confirm that the target updated the field
1254      correctly.
1255
1256      gdbarch_dump(): Add a fprintf_unfiltered call so that the new
1257      field is dumped out
1258
1259      \`\`startup_gdbarch()'': Append an initial value to the static
1260      variable (base values on the host's c-type system).
1261
1262      get_gdbarch(): Implement the set/get functions (probably using
1263      the macro's as shortcuts).
1264
1265      */
1266
1267 EOF
1268 function_list | while do_read
1269 do
1270     if class_is_variable_p
1271     then
1272         printf "  ${returntype} ${function};\n"
1273     elif class_is_function_p
1274     then
1275         printf "  gdbarch_${function}_ftype *${function};\n"
1276     fi
1277 done
1278 printf "};\n"
1279
1280 # A pre-initialized vector
1281 printf "\n"
1282 printf "\n"
1283 cat <<EOF
1284 /* The default architecture uses host values (for want of a better
1285    choice). */
1286 EOF
1287 printf "\n"
1288 printf "extern const struct bfd_arch_info bfd_default_arch_struct;\n"
1289 printf "\n"
1290 printf "struct gdbarch startup_gdbarch =\n"
1291 printf "{\n"
1292 printf "  1, /* Always initialized.  */\n"
1293 printf "  NULL, /* The obstack.  */\n"
1294 printf "  /* basic architecture information */\n"
1295 function_list | while do_read
1296 do
1297     if class_is_info_p
1298     then
1299         printf "  ${staticdefault},  /* ${function} */\n"
1300     fi
1301 done
1302 cat <<EOF
1303   /* target specific vector and its dump routine */
1304   NULL, NULL,
1305   /*per-architecture data-pointers and swap regions */
1306   0, NULL, NULL,
1307   /* Multi-arch values */
1308 EOF
1309 function_list | while do_read
1310 do
1311     if class_is_function_p || class_is_variable_p
1312     then
1313         printf "  ${staticdefault},  /* ${function} */\n"
1314     fi
1315 done
1316 cat <<EOF
1317   /* startup_gdbarch() */
1318 };
1319
1320 struct gdbarch *target_gdbarch = &startup_gdbarch;
1321 EOF
1322
1323 # Create a new gdbarch struct
1324 cat <<EOF
1325
1326 /* Create a new \`\`struct gdbarch'' based on information provided by
1327    \`\`struct gdbarch_info''. */
1328 EOF
1329 printf "\n"
1330 cat <<EOF
1331 struct gdbarch *
1332 gdbarch_alloc (const struct gdbarch_info *info,
1333                struct gdbarch_tdep *tdep)
1334 {
1335   struct gdbarch *gdbarch;
1336
1337   /* Create an obstack for allocating all the per-architecture memory,
1338      then use that to allocate the architecture vector.  */
1339   struct obstack *obstack = XMALLOC (struct obstack);
1340   obstack_init (obstack);
1341   gdbarch = obstack_alloc (obstack, sizeof (*gdbarch));
1342   memset (gdbarch, 0, sizeof (*gdbarch));
1343   gdbarch->obstack = obstack;
1344
1345   alloc_gdbarch_data (gdbarch);
1346
1347   gdbarch->tdep = tdep;
1348 EOF
1349 printf "\n"
1350 function_list | while do_read
1351 do
1352     if class_is_info_p
1353     then
1354         printf "  gdbarch->${function} = info->${function};\n"
1355     fi
1356 done
1357 printf "\n"
1358 printf "  /* Force the explicit initialization of these. */\n"
1359 function_list | while do_read
1360 do
1361     if class_is_function_p || class_is_variable_p
1362     then
1363         if [ -n "${predefault}" -a "x${predefault}" != "x0" ]
1364         then
1365           printf "  gdbarch->${function} = ${predefault};\n"
1366         fi
1367     fi
1368 done
1369 cat <<EOF
1370   /* gdbarch_alloc() */
1371
1372   return gdbarch;
1373 }
1374 EOF
1375
1376 # Free a gdbarch struct.
1377 printf "\n"
1378 printf "\n"
1379 cat <<EOF
1380 /* Allocate extra space using the per-architecture obstack.  */
1381
1382 void *
1383 gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
1384 {
1385   void *data = obstack_alloc (arch->obstack, size);
1386   memset (data, 0, size);
1387   return data;
1388 }
1389
1390
1391 /* Free a gdbarch struct.  This should never happen in normal
1392    operation --- once you've created a gdbarch, you keep it around.
1393    However, if an architecture's init function encounters an error
1394    building the structure, it may need to clean up a partially
1395    constructed gdbarch.  */
1396
1397 void
1398 gdbarch_free (struct gdbarch *arch)
1399 {
1400   struct obstack *obstack;
1401   gdb_assert (arch != NULL);
1402   gdb_assert (!arch->initialized_p);
1403   obstack = arch->obstack;
1404   obstack_free (obstack, 0); /* Includes the ARCH.  */
1405   xfree (obstack);
1406 }
1407 EOF
1408
1409 # verify a new architecture
1410 cat <<EOF
1411
1412
1413 /* Ensure that all values in a GDBARCH are reasonable.  */
1414
1415 static void
1416 verify_gdbarch (struct gdbarch *gdbarch)
1417 {
1418   struct ui_file *log;
1419   struct cleanup *cleanups;
1420   long dummy;
1421   char *buf;
1422   log = mem_fileopen ();
1423   cleanups = make_cleanup_ui_file_delete (log);
1424   /* fundamental */
1425   if (gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)
1426     fprintf_unfiltered (log, "\n\tbyte-order");
1427   if (gdbarch->bfd_arch_info == NULL)
1428     fprintf_unfiltered (log, "\n\tbfd_arch_info");
1429   /* Check those that need to be defined for the given multi-arch level. */
1430 EOF
1431 function_list | while do_read
1432 do
1433     if class_is_function_p || class_is_variable_p
1434     then
1435         if [ "x${invalid_p}" = "x0" ]
1436         then
1437             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1438         elif class_is_predicate_p
1439         then
1440             printf "  /* Skip verify of ${function}, has predicate */\n"
1441         # FIXME: See do_read for potential simplification
1442         elif [ -n "${invalid_p}" -a -n "${postdefault}" ]
1443         then
1444             printf "  if (${invalid_p})\n"
1445             printf "    gdbarch->${function} = ${postdefault};\n"
1446         elif [ -n "${predefault}" -a -n "${postdefault}" ]
1447         then
1448             printf "  if (gdbarch->${function} == ${predefault})\n"
1449             printf "    gdbarch->${function} = ${postdefault};\n"
1450         elif [ -n "${postdefault}" ]
1451         then
1452             printf "  if (gdbarch->${function} == 0)\n"
1453             printf "    gdbarch->${function} = ${postdefault};\n"
1454         elif [ -n "${invalid_p}" ]
1455         then
1456             printf "  if (${invalid_p})\n"
1457             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1458         elif [ -n "${predefault}" ]
1459         then
1460             printf "  if (gdbarch->${function} == ${predefault})\n"
1461             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1462         fi
1463     fi
1464 done
1465 cat <<EOF
1466   buf = ui_file_xstrdup (log, &dummy);
1467   make_cleanup (xfree, buf);
1468   if (strlen (buf) > 0)
1469     internal_error (__FILE__, __LINE__,
1470                     _("verify_gdbarch: the following are invalid ...%s"),
1471                     buf);
1472   do_cleanups (cleanups);
1473 }
1474 EOF
1475
1476 # dump the structure
1477 printf "\n"
1478 printf "\n"
1479 cat <<EOF
1480 /* Print out the details of the current architecture. */
1481
1482 void
1483 gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
1484 {
1485   const char *gdb_nm_file = "<not-defined>";
1486 #if defined (GDB_NM_FILE)
1487   gdb_nm_file = GDB_NM_FILE;
1488 #endif
1489   fprintf_unfiltered (file,
1490                       "gdbarch_dump: GDB_NM_FILE = %s\\n",
1491                       gdb_nm_file);
1492 EOF
1493 function_list | sort -t: -k 3 | while do_read
1494 do
1495     # First the predicate
1496     if class_is_predicate_p
1497     then
1498         printf "  fprintf_unfiltered (file,\n"
1499         printf "                      \"gdbarch_dump: gdbarch_${function}_p() = %%d\\\\n\",\n"
1500         printf "                      gdbarch_${function}_p (gdbarch));\n"
1501     fi
1502     # Print the corresponding value.
1503     if class_is_function_p
1504     then
1505         printf "  fprintf_unfiltered (file,\n"
1506         printf "                      \"gdbarch_dump: ${function} = <%%s>\\\\n\",\n"
1507         printf "                      host_address_to_string (gdbarch->${function}));\n"
1508     else
1509         # It is a variable
1510         case "${print}:${returntype}" in
1511             :CORE_ADDR )
1512                 fmt="%s"
1513                 print="core_addr_to_string_nz (gdbarch->${function})"
1514                 ;;
1515             :* )
1516                 fmt="%s"
1517                 print="plongest (gdbarch->${function})"
1518                 ;;
1519             * )
1520                 fmt="%s"
1521                 ;;
1522         esac
1523         printf "  fprintf_unfiltered (file,\n"
1524         printf "                      \"gdbarch_dump: ${function} = %s\\\\n\",\n" "${fmt}"
1525         printf "                      ${print});\n"
1526     fi
1527 done
1528 cat <<EOF
1529   if (gdbarch->dump_tdep != NULL)
1530     gdbarch->dump_tdep (gdbarch, file);
1531 }
1532 EOF
1533
1534
1535 # GET/SET
1536 printf "\n"
1537 cat <<EOF
1538 struct gdbarch_tdep *
1539 gdbarch_tdep (struct gdbarch *gdbarch)
1540 {
1541   if (gdbarch_debug >= 2)
1542     fprintf_unfiltered (gdb_stdlog, "gdbarch_tdep called\\n");
1543   return gdbarch->tdep;
1544 }
1545 EOF
1546 printf "\n"
1547 function_list | while do_read
1548 do
1549     if class_is_predicate_p
1550     then
1551         printf "\n"
1552         printf "int\n"
1553         printf "gdbarch_${function}_p (struct gdbarch *gdbarch)\n"
1554         printf "{\n"
1555         printf "  gdb_assert (gdbarch != NULL);\n"
1556         printf "  return ${predicate};\n"
1557         printf "}\n"
1558     fi
1559     if class_is_function_p
1560     then
1561         printf "\n"
1562         printf "${returntype}\n"
1563         if [ "x${formal}" = "xvoid" ]
1564         then
1565           printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1566         else
1567           printf "gdbarch_${function} (struct gdbarch *gdbarch, ${formal})\n"
1568         fi
1569         printf "{\n"
1570         printf "  gdb_assert (gdbarch != NULL);\n"
1571         printf "  gdb_assert (gdbarch->${function} != NULL);\n"
1572         if class_is_predicate_p && test -n "${predefault}"
1573         then
1574             # Allow a call to a function with a predicate.
1575             printf "  /* Do not check predicate: ${predicate}, allow call.  */\n"
1576         fi
1577         printf "  if (gdbarch_debug >= 2)\n"
1578         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1579         if [ "x${actual}" = "x-" -o "x${actual}" = "x" ]
1580         then
1581             if class_is_multiarch_p
1582             then
1583                 params="gdbarch"
1584             else
1585                 params=""
1586             fi
1587         else
1588             if class_is_multiarch_p
1589             then
1590                 params="gdbarch, ${actual}"
1591             else
1592                 params="${actual}"
1593             fi
1594         fi
1595         if [ "x${returntype}" = "xvoid" ]
1596         then
1597           printf "  gdbarch->${function} (${params});\n"
1598         else
1599           printf "  return gdbarch->${function} (${params});\n"
1600         fi
1601         printf "}\n"
1602         printf "\n"
1603         printf "void\n"
1604         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1605         printf "            `echo ${function} | sed -e 's/./ /g'`  gdbarch_${function}_ftype ${function})\n"
1606         printf "{\n"
1607         printf "  gdbarch->${function} = ${function};\n"
1608         printf "}\n"
1609     elif class_is_variable_p
1610     then
1611         printf "\n"
1612         printf "${returntype}\n"
1613         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1614         printf "{\n"
1615         printf "  gdb_assert (gdbarch != NULL);\n"
1616         if [ "x${invalid_p}" = "x0" ]
1617         then
1618             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1619         elif [ -n "${invalid_p}" ]
1620         then
1621             printf "  /* Check variable is valid.  */\n"
1622             printf "  gdb_assert (!(${invalid_p}));\n"
1623         elif [ -n "${predefault}" ]
1624         then
1625             printf "  /* Check variable changed from pre-default.  */\n"
1626             printf "  gdb_assert (gdbarch->${function} != ${predefault});\n"
1627         fi
1628         printf "  if (gdbarch_debug >= 2)\n"
1629         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1630         printf "  return gdbarch->${function};\n"
1631         printf "}\n"
1632         printf "\n"
1633         printf "void\n"
1634         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1635         printf "            `echo ${function} | sed -e 's/./ /g'`  ${returntype} ${function})\n"
1636         printf "{\n"
1637         printf "  gdbarch->${function} = ${function};\n"
1638         printf "}\n"
1639     elif class_is_info_p
1640     then
1641         printf "\n"
1642         printf "${returntype}\n"
1643         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1644         printf "{\n"
1645         printf "  gdb_assert (gdbarch != NULL);\n"
1646         printf "  if (gdbarch_debug >= 2)\n"
1647         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1648         printf "  return gdbarch->${function};\n"
1649         printf "}\n"
1650     fi
1651 done
1652
1653 # All the trailing guff
1654 cat <<EOF
1655
1656
1657 /* Keep a registry of per-architecture data-pointers required by GDB
1658    modules. */
1659
1660 struct gdbarch_data
1661 {
1662   unsigned index;
1663   int init_p;
1664   gdbarch_data_pre_init_ftype *pre_init;
1665   gdbarch_data_post_init_ftype *post_init;
1666 };
1667
1668 struct gdbarch_data_registration
1669 {
1670   struct gdbarch_data *data;
1671   struct gdbarch_data_registration *next;
1672 };
1673
1674 struct gdbarch_data_registry
1675 {
1676   unsigned nr;
1677   struct gdbarch_data_registration *registrations;
1678 };
1679
1680 struct gdbarch_data_registry gdbarch_data_registry =
1681 {
1682   0, NULL,
1683 };
1684
1685 static struct gdbarch_data *
1686 gdbarch_data_register (gdbarch_data_pre_init_ftype *pre_init,
1687                        gdbarch_data_post_init_ftype *post_init)
1688 {
1689   struct gdbarch_data_registration **curr;
1690   /* Append the new registraration.  */
1691   for (curr = &gdbarch_data_registry.registrations;
1692        (*curr) != NULL;
1693        curr = &(*curr)->next);
1694   (*curr) = XMALLOC (struct gdbarch_data_registration);
1695   (*curr)->next = NULL;
1696   (*curr)->data = XMALLOC (struct gdbarch_data);
1697   (*curr)->data->index = gdbarch_data_registry.nr++;
1698   (*curr)->data->pre_init = pre_init;
1699   (*curr)->data->post_init = post_init;
1700   (*curr)->data->init_p = 1;
1701   return (*curr)->data;
1702 }
1703
1704 struct gdbarch_data *
1705 gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *pre_init)
1706 {
1707   return gdbarch_data_register (pre_init, NULL);
1708 }
1709
1710 struct gdbarch_data *
1711 gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *post_init)
1712 {
1713   return gdbarch_data_register (NULL, post_init);
1714 }
1715
1716 /* Create/delete the gdbarch data vector. */
1717
1718 static void
1719 alloc_gdbarch_data (struct gdbarch *gdbarch)
1720 {
1721   gdb_assert (gdbarch->data == NULL);
1722   gdbarch->nr_data = gdbarch_data_registry.nr;
1723   gdbarch->data = GDBARCH_OBSTACK_CALLOC (gdbarch, gdbarch->nr_data, void *);
1724 }
1725
1726 /* Initialize the current value of the specified per-architecture
1727    data-pointer. */
1728
1729 void
1730 deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1731                              struct gdbarch_data *data,
1732                              void *pointer)
1733 {
1734   gdb_assert (data->index < gdbarch->nr_data);
1735   gdb_assert (gdbarch->data[data->index] == NULL);
1736   gdb_assert (data->pre_init == NULL);
1737   gdbarch->data[data->index] = pointer;
1738 }
1739
1740 /* Return the current value of the specified per-architecture
1741    data-pointer. */
1742
1743 void *
1744 gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *data)
1745 {
1746   gdb_assert (data->index < gdbarch->nr_data);
1747   if (gdbarch->data[data->index] == NULL)
1748     {
1749       /* The data-pointer isn't initialized, call init() to get a
1750          value.  */
1751       if (data->pre_init != NULL)
1752         /* Mid architecture creation: pass just the obstack, and not
1753            the entire architecture, as that way it isn't possible for
1754            pre-init code to refer to undefined architecture
1755            fields.  */
1756         gdbarch->data[data->index] = data->pre_init (gdbarch->obstack);
1757       else if (gdbarch->initialized_p
1758                && data->post_init != NULL)
1759         /* Post architecture creation: pass the entire architecture
1760            (as all fields are valid), but be careful to also detect
1761            recursive references.  */
1762         {
1763           gdb_assert (data->init_p);
1764           data->init_p = 0;
1765           gdbarch->data[data->index] = data->post_init (gdbarch);
1766           data->init_p = 1;
1767         }
1768       else
1769         /* The architecture initialization hasn't completed - punt -
1770          hope that the caller knows what they are doing.  Once
1771          deprecated_set_gdbarch_data has been initialized, this can be
1772          changed to an internal error.  */
1773         return NULL;
1774       gdb_assert (gdbarch->data[data->index] != NULL);
1775     }
1776   return gdbarch->data[data->index];
1777 }
1778
1779
1780 /* Keep a registry of the architectures known by GDB. */
1781
1782 struct gdbarch_registration
1783 {
1784   enum bfd_architecture bfd_architecture;
1785   gdbarch_init_ftype *init;
1786   gdbarch_dump_tdep_ftype *dump_tdep;
1787   struct gdbarch_list *arches;
1788   struct gdbarch_registration *next;
1789 };
1790
1791 static struct gdbarch_registration *gdbarch_registry = NULL;
1792
1793 static void
1794 append_name (const char ***buf, int *nr, const char *name)
1795 {
1796   *buf = xrealloc (*buf, sizeof (char**) * (*nr + 1));
1797   (*buf)[*nr] = name;
1798   *nr += 1;
1799 }
1800
1801 const char **
1802 gdbarch_printable_names (void)
1803 {
1804   /* Accumulate a list of names based on the registed list of
1805      architectures. */
1806   enum bfd_architecture a;
1807   int nr_arches = 0;
1808   const char **arches = NULL;
1809   struct gdbarch_registration *rego;
1810   for (rego = gdbarch_registry;
1811        rego != NULL;
1812        rego = rego->next)
1813     {
1814       const struct bfd_arch_info *ap;
1815       ap = bfd_lookup_arch (rego->bfd_architecture, 0);
1816       if (ap == NULL)
1817         internal_error (__FILE__, __LINE__,
1818                         _("gdbarch_architecture_names: multi-arch unknown"));
1819       do
1820         {
1821           append_name (&arches, &nr_arches, ap->printable_name);
1822           ap = ap->next;
1823         }
1824       while (ap != NULL);
1825     }
1826   append_name (&arches, &nr_arches, NULL);
1827   return arches;
1828 }
1829
1830
1831 void
1832 gdbarch_register (enum bfd_architecture bfd_architecture,
1833                   gdbarch_init_ftype *init,
1834                   gdbarch_dump_tdep_ftype *dump_tdep)
1835 {
1836   struct gdbarch_registration **curr;
1837   const struct bfd_arch_info *bfd_arch_info;
1838   /* Check that BFD recognizes this architecture */
1839   bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0);
1840   if (bfd_arch_info == NULL)
1841     {
1842       internal_error (__FILE__, __LINE__,
1843                       _("gdbarch: Attempt to register unknown architecture (%d)"),
1844                       bfd_architecture);
1845     }
1846   /* Check that we haven't seen this architecture before */
1847   for (curr = &gdbarch_registry;
1848        (*curr) != NULL;
1849        curr = &(*curr)->next)
1850     {
1851       if (bfd_architecture == (*curr)->bfd_architecture)
1852         internal_error (__FILE__, __LINE__,
1853                         _("gdbarch: Duplicate registraration of architecture (%s)"),
1854                         bfd_arch_info->printable_name);
1855     }
1856   /* log it */
1857   if (gdbarch_debug)
1858     fprintf_unfiltered (gdb_stdlog, "register_gdbarch_init (%s, %s)\n",
1859                         bfd_arch_info->printable_name,
1860                         host_address_to_string (init));
1861   /* Append it */
1862   (*curr) = XMALLOC (struct gdbarch_registration);
1863   (*curr)->bfd_architecture = bfd_architecture;
1864   (*curr)->init = init;
1865   (*curr)->dump_tdep = dump_tdep;
1866   (*curr)->arches = NULL;
1867   (*curr)->next = NULL;
1868 }
1869
1870 void
1871 register_gdbarch_init (enum bfd_architecture bfd_architecture,
1872                        gdbarch_init_ftype *init)
1873 {
1874   gdbarch_register (bfd_architecture, init, NULL);
1875 }
1876
1877
1878 /* Look for an architecture using gdbarch_info.  */
1879
1880 struct gdbarch_list *
1881 gdbarch_list_lookup_by_info (struct gdbarch_list *arches,
1882                              const struct gdbarch_info *info)
1883 {
1884   for (; arches != NULL; arches = arches->next)
1885     {
1886       if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info)
1887         continue;
1888       if (info->byte_order != arches->gdbarch->byte_order)
1889         continue;
1890       if (info->osabi != arches->gdbarch->osabi)
1891         continue;
1892       if (info->target_desc != arches->gdbarch->target_desc)
1893         continue;
1894       return arches;
1895     }
1896   return NULL;
1897 }
1898
1899
1900 /* Find an architecture that matches the specified INFO.  Create a new
1901    architecture if needed.  Return that new architecture.  */
1902
1903 struct gdbarch *
1904 gdbarch_find_by_info (struct gdbarch_info info)
1905 {
1906   struct gdbarch *new_gdbarch;
1907   struct gdbarch_registration *rego;
1908
1909   /* Fill in missing parts of the INFO struct using a number of
1910      sources: "set ..."; INFOabfd supplied; and the global
1911      defaults.  */
1912   gdbarch_info_fill (&info);
1913
1914   /* Must have found some sort of architecture. */
1915   gdb_assert (info.bfd_arch_info != NULL);
1916
1917   if (gdbarch_debug)
1918     {
1919       fprintf_unfiltered (gdb_stdlog,
1920                           "gdbarch_find_by_info: info.bfd_arch_info %s\n",
1921                           (info.bfd_arch_info != NULL
1922                            ? info.bfd_arch_info->printable_name
1923                            : "(null)"));
1924       fprintf_unfiltered (gdb_stdlog,
1925                           "gdbarch_find_by_info: info.byte_order %d (%s)\n",
1926                           info.byte_order,
1927                           (info.byte_order == BFD_ENDIAN_BIG ? "big"
1928                            : info.byte_order == BFD_ENDIAN_LITTLE ? "little"
1929                            : "default"));
1930       fprintf_unfiltered (gdb_stdlog,
1931                           "gdbarch_find_by_info: info.osabi %d (%s)\n",
1932                           info.osabi, gdbarch_osabi_name (info.osabi));
1933       fprintf_unfiltered (gdb_stdlog,
1934                           "gdbarch_find_by_info: info.abfd %s\n",
1935                           host_address_to_string (info.abfd));
1936       fprintf_unfiltered (gdb_stdlog,
1937                           "gdbarch_find_by_info: info.tdep_info %s\n",
1938                           host_address_to_string (info.tdep_info));
1939     }
1940
1941   /* Find the tdep code that knows about this architecture.  */
1942   for (rego = gdbarch_registry;
1943        rego != NULL;
1944        rego = rego->next)
1945     if (rego->bfd_architecture == info.bfd_arch_info->arch)
1946       break;
1947   if (rego == NULL)
1948     {
1949       if (gdbarch_debug)
1950         fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
1951                             "No matching architecture\n");
1952       return 0;
1953     }
1954
1955   /* Ask the tdep code for an architecture that matches "info".  */
1956   new_gdbarch = rego->init (info, rego->arches);
1957
1958   /* Did the tdep code like it?  No.  Reject the change and revert to
1959      the old architecture.  */
1960   if (new_gdbarch == NULL)
1961     {
1962       if (gdbarch_debug)
1963         fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
1964                             "Target rejected architecture\n");
1965       return NULL;
1966     }
1967
1968   /* Is this a pre-existing architecture (as determined by already
1969      being initialized)?  Move it to the front of the architecture
1970      list (keeping the list sorted Most Recently Used).  */
1971   if (new_gdbarch->initialized_p)
1972     {
1973       struct gdbarch_list **list;
1974       struct gdbarch_list *this;
1975       if (gdbarch_debug)
1976         fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
1977                             "Previous architecture %s (%s) selected\n",
1978                             host_address_to_string (new_gdbarch),
1979                             new_gdbarch->bfd_arch_info->printable_name);
1980       /* Find the existing arch in the list.  */
1981       for (list = &rego->arches;
1982            (*list) != NULL && (*list)->gdbarch != new_gdbarch;
1983            list = &(*list)->next);
1984       /* It had better be in the list of architectures.  */
1985       gdb_assert ((*list) != NULL && (*list)->gdbarch == new_gdbarch);
1986       /* Unlink THIS.  */
1987       this = (*list);
1988       (*list) = this->next;
1989       /* Insert THIS at the front.  */
1990       this->next = rego->arches;
1991       rego->arches = this;
1992       /* Return it.  */
1993       return new_gdbarch;
1994     }
1995
1996   /* It's a new architecture.  */
1997   if (gdbarch_debug)
1998     fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
1999                         "New architecture %s (%s) selected\n",
2000                         host_address_to_string (new_gdbarch),
2001                         new_gdbarch->bfd_arch_info->printable_name);
2002
2003   /* Insert the new architecture into the front of the architecture
2004      list (keep the list sorted Most Recently Used).  */
2005   {
2006     struct gdbarch_list *this = XMALLOC (struct gdbarch_list);
2007     this->next = rego->arches;
2008     this->gdbarch = new_gdbarch;
2009     rego->arches = this;
2010   }
2011
2012   /* Check that the newly installed architecture is valid.  Plug in
2013      any post init values.  */
2014   new_gdbarch->dump_tdep = rego->dump_tdep;
2015   verify_gdbarch (new_gdbarch);
2016   new_gdbarch->initialized_p = 1;
2017
2018   if (gdbarch_debug)
2019     gdbarch_dump (new_gdbarch, gdb_stdlog);
2020
2021   return new_gdbarch;
2022 }
2023
2024 /* Make the specified architecture current.  */
2025
2026 void
2027 deprecated_target_gdbarch_select_hack (struct gdbarch *new_gdbarch)
2028 {
2029   gdb_assert (new_gdbarch != NULL);
2030   gdb_assert (new_gdbarch->initialized_p);
2031   target_gdbarch = new_gdbarch;
2032   observer_notify_architecture_changed (new_gdbarch);
2033   registers_changed ();
2034 }
2035
2036 extern void _initialize_gdbarch (void);
2037
2038 void
2039 _initialize_gdbarch (void)
2040 {
2041   struct cmd_list_element *c;
2042
2043   add_setshow_zinteger_cmd ("arch", class_maintenance, &gdbarch_debug, _("\\
2044 Set architecture debugging."), _("\\
2045 Show architecture debugging."), _("\\
2046 When non-zero, architecture debugging is enabled."),
2047                             NULL,
2048                             show_gdbarch_debug,
2049                             &setdebuglist, &showdebuglist);
2050 }
2051 EOF
2052
2053 # close things off
2054 exec 1>&2
2055 #../move-if-change new-gdbarch.c gdbarch.c
2056 compare_new gdbarch.c