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 # Return true if GDB should use hardware single-stepping to execute
 658 # the displaced instruction identified by CLOSURE.  If false,
 659 # GDB will simply restart execution at the displaced instruction
 660 # location, and it is up to the target to ensure GDB will receive
 661 # control again (e.g. by placing a software breakpoint instruction
 662 # into the displaced instruction buffer).
 663 #
 664 # The default implementation returns false on all targets that
 665 # provide a gdbarch_software_single_step routine, and true otherwise.
 666 m:int:displaced_step_hw_singlestep:struct displaced_step_closure *closure:closure::default_displaced_step_hw_singlestep::0
 667
 668 # Fix up the state resulting from successfully single-stepping a
 669 # displaced instruction, to give the result we would have gotten from
 670 # stepping the instruction in its original location.
 671 #
 672 # REGS is the register state resulting from single-stepping the
 673 # displaced instruction.
 674 #
 675 # CLOSURE is the result from the matching call to
 676 # gdbarch_displaced_step_copy_insn.
 677 #
 678 # If you provide gdbarch_displaced_step_copy_insn.but not this
 679 # function, then GDB assumes that no fixup is needed after
 680 # single-stepping the instruction.
 681 #
 682 # For a general explanation of displaced stepping and how GDB uses it,
 683 # see the comments in infrun.c.
 684 M:void:displaced_step_fixup:struct displaced_step_closure *closure, CORE_ADDR from, CORE_ADDR to, struct regcache *regs:closure, from, to, regs::NULL
 685
 686 # Free a closure returned by gdbarch_displaced_step_copy_insn.
 687 #
 688 # If you provide gdbarch_displaced_step_copy_insn, you must provide
 689 # this function as well.
 690 #
 691 # If your architecture uses closures that don't need to be freed, then
 692 # you can use simple_displaced_step_free_closure here.
 693 #
 694 # For a general explanation of displaced stepping and how GDB uses it,
 695 # see the comments in infrun.c.
 696 m:void:displaced_step_free_closure:struct displaced_step_closure *closure:closure::NULL::(! gdbarch->displaced_step_free_closure) != (! gdbarch->displaced_step_copy_insn)
 697
 698 # Return the address of an appropriate place to put displaced
 699 # instructions while we step over them.  There need only be one such
 700 # place, since we're only stepping one thread over a breakpoint at a
 701 # time.
 702 #
 703 # For a general explanation of displaced stepping and how GDB uses it,
 704 # see the comments in infrun.c.
 705 m:CORE_ADDR:displaced_step_location:void:::NULL::(! gdbarch->displaced_step_location) != (! gdbarch->displaced_step_copy_insn)
 706
 707 # Refresh overlay mapped state for section OSECT.
 708 F:void:overlay_update:struct obj_section *osect:osect
 709
 710 M:const struct target_desc *:core_read_description:struct target_ops *target, bfd *abfd:target, abfd
 711
 712 # Handle special encoding of static variables in stabs debug info.
 713 F:char *:static_transform_name:char *name:name
 714 # Set if the address in N_SO or N_FUN stabs may be zero.
 715 v:int:sofun_address_maybe_missing:::0:0::0
 716
 717 # Parse the instruction at ADDR storing in the record execution log
 718 # the registers REGCACHE and memory ranges that will be affected when
 719 # the instruction executes, along with their current values.
 720 # Return -1 if something goes wrong, 0 otherwise.
 721 M:int:process_record:struct regcache *regcache, CORE_ADDR addr:regcache, addr
 722
 723 # Save process state after a signal.
 724 # Return -1 if something goes wrong, 0 otherwise.
 725 M:int:process_record_signal:struct regcache *regcache, enum target_signal signal:regcache, signal
 726
 727 # Signal translation: translate inferior's signal (host's) number into
 728 # GDB's representation.
 729 m:enum target_signal:target_signal_from_host:int signo:signo::default_target_signal_from_host::0
 730 # Signal translation: translate GDB's signal number into inferior's host
 731 # signal number.
 732 m:int:target_signal_to_host:enum target_signal ts:ts::default_target_signal_to_host::0
 733
 734 # Extra signal info inspection.
 735 #
 736 # Return a type suitable to inspect extra signal information.
 737 M:struct type *:get_siginfo_type:void:
 738
 739 # Record architecture-specific information from the symbol table.
 740 M:void:record_special_symbol:struct objfile *objfile, asymbol *sym:objfile, sym
 741
 742 # Function for the 'catch syscall' feature.
 743
 744 # Get architecture-specific system calls information from registers.
 745 M:LONGEST:get_syscall_number:ptid_t ptid:ptid
 746
 747 # True if the list of shared libraries is one and only for all
 748 # processes, as opposed to a list of shared libraries per inferior.
 749 # This usually means that all processes, although may or may not share
 750 # an address space, will see the same set of symbols at the same
 751 # addresses.
 752 v:int:has_global_solist:::0:0::0
 753
 754 # On some targets, even though each inferior has its own private
 755 # address space, the debug interface takes care of making breakpoints
 756 # visible to all address spaces automatically.  For such cases,
 757 # this property should be set to true.
 758 v:int:has_global_breakpoints:::0:0::0
 759 EOF
 760 }
 761
 762 #
 763 # The .log file
 764 #
 765 exec > new-gdbarch.log
 766 function_list | while do_read
 767 do
 768     cat <<EOF
 769 ${class} ${returntype} ${function} ($formal)
 770 EOF
 771     for r in ${read}
 772     do
 773         eval echo \"\ \ \ \ ${r}=\${${r}}\"
 774     done
 775     if class_is_predicate_p && fallback_default_p
 776     then
 777         echo "Error: predicate function ${function} can not have a non- multi-arch default" 1>&2
 778         kill $$
 779         exit 1
 780     fi
 781     if [ "x${invalid_p}" = "x0" -a -n "${postdefault}" ]
 782     then
 783         echo "Error: postdefault is useless when invalid_p=0" 1>&2
 784         kill $$
 785         exit 1
 786     fi
 787     if class_is_multiarch_p
 788     then
 789         if class_is_predicate_p ; then :
 790         elif test "x${predefault}" = "x"
 791         then
 792             echo "Error: pure multi-arch function ${function} must have a predefault" 1>&2
 793             kill $$
 794             exit 1
 795         fi
 796     fi
 797     echo ""
 798 done
 799
 800 exec 1>&2
 801 compare_new gdbarch.log
 802
 803
 804 copyright ()
 805 {
 806 cat <<EOF
 807 /* *INDENT-OFF* */ /* THIS FILE IS GENERATED */
 808
 809 /* Dynamic architecture support for GDB, the GNU debugger.
 810
 811    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
 812    Free Software Foundation, Inc.
 813
 814    This file is part of GDB.
 815
 816    This program is free software; you can redistribute it and/or modify
 817    it under the terms of the GNU General Public License as published by
 818    the Free Software Foundation; either version 3 of the License, or
 819    (at your option) any later version.
 820
 821    This program is distributed in the hope that it will be useful,
 822    but WITHOUT ANY WARRANTY; without even the implied warranty of
 823    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 824    GNU General Public License for more details.
 825
 826    You should have received a copy of the GNU General Public License
 827    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 828
 829 /* This file was created with the aid of \`\`gdbarch.sh''.
 830
 831    The Bourne shell script \`\`gdbarch.sh'' creates the files
 832    \`\`new-gdbarch.c'' and \`\`new-gdbarch.h and then compares them
 833    against the existing \`\`gdbarch.[hc]''.  Any differences found
 834    being reported.
 835
 836    If editing this file, please also run gdbarch.sh and merge any
 837    changes into that script. Conversely, when making sweeping changes
 838    to this file, modifying gdbarch.sh and using its output may prove
 839    easier. */
 840
 841 EOF
 842 }
 843
 844 #
 845 # The .h file
 846 #
 847
 848 exec > new-gdbarch.h
 849 copyright
 850 cat <<EOF
 851 #ifndef GDBARCH_H
 852 #define GDBARCH_H
 853
 854 struct floatformat;
 855 struct ui_file;
 856 struct frame_info;
 857 struct value;
 858 struct objfile;
 859 struct obj_section;
 860 struct minimal_symbol;
 861 struct regcache;
 862 struct reggroup;
 863 struct regset;
 864 struct disassemble_info;
 865 struct target_ops;
 866 struct obstack;
 867 struct bp_target_info;
 868 struct target_desc;
 869 struct displaced_step_closure;
 870 struct core_regset_section;
 871 struct syscall;
 872
 873 /* The architecture associated with the connection to the target.
 874
 875    The architecture vector provides some information that is really
 876    a property of the target: The layout of certain packets, for instance;
 877    or the solib_ops vector.  Etc.  To differentiate architecture accesses
 878    to per-target properties from per-thread/per-frame/per-objfile properties,
 879    accesses to per-target properties should be made through target_gdbarch.
 880
 881    Eventually, when support for multiple targets is implemented in
 882    GDB, this global should be made target-specific.  */
 883 extern struct gdbarch *target_gdbarch;
 884 EOF
 885
 886 # function typedef's
 887 printf "\n"
 888 printf "\n"
 889 printf "/* The following are pre-initialized by GDBARCH. */\n"
 890 function_list | while do_read
 891 do
 892     if class_is_info_p
 893     then
 894         printf "\n"
 895         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 896         printf "/* set_gdbarch_${function}() - not applicable - pre-initialized. */\n"
 897     fi
 898 done
 899
 900 # function typedef's
 901 printf "\n"
 902 printf "\n"
 903 printf "/* The following are initialized by the target dependent code. */\n"
 904 function_list | while do_read
 905 do
 906     if [ -n "${comment}" ]
 907     then
 908         echo "${comment}" | sed \
 909             -e '2 s,#,/*,' \
 910             -e '3,$ s,#,  ,' \
 911             -e '$ s,$, */,'
 912     fi
 913
 914     if class_is_predicate_p
 915     then
 916         printf "\n"
 917         printf "extern int gdbarch_${function}_p (struct gdbarch *gdbarch);\n"
 918     fi
 919     if class_is_variable_p
 920     then
 921         printf "\n"
 922         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 923         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, ${returntype} ${function});\n"
 924     fi
 925     if class_is_function_p
 926     then
 927         printf "\n"
 928         if [ "x${formal}" = "xvoid" ] && class_is_multiarch_p
 929         then
 930             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch);\n"
 931         elif class_is_multiarch_p
 932         then
 933             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch, ${formal});\n"
 934         else
 935             printf "typedef ${returntype} (gdbarch_${function}_ftype) (${formal});\n"
 936         fi
 937         if [ "x${formal}" = "xvoid" ]
 938         then
 939           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 940         else
 941           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch, ${formal});\n"
 942         fi
 943         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, gdbarch_${function}_ftype *${function});\n"
 944     fi
 945 done
 946
 947 # close it off
 948 cat <<EOF
 949
 950 /* Definition for an unknown syscall, used basically in error-cases.  */
 951 #define UNKNOWN_SYSCALL (-1)
 952
 953 extern struct gdbarch_tdep *gdbarch_tdep (struct gdbarch *gdbarch);
 954
 955
 956 /* Mechanism for co-ordinating the selection of a specific
 957    architecture.
 958
 959    GDB targets (*-tdep.c) can register an interest in a specific
 960    architecture.  Other GDB components can register a need to maintain
 961    per-architecture data.
 962
 963    The mechanisms below ensures that there is only a loose connection
 964    between the set-architecture command and the various GDB
 965    components.  Each component can independently register their need
 966    to maintain architecture specific data with gdbarch.
 967
 968    Pragmatics:
 969
 970    Previously, a single TARGET_ARCHITECTURE_HOOK was provided.  It
 971    didn't scale.
 972
 973    The more traditional mega-struct containing architecture specific
 974    data for all the various GDB components was also considered.  Since
 975    GDB is built from a variable number of (fairly independent)
 976    components it was determined that the global aproach was not
 977    applicable. */
 978
 979
 980 /* Register a new architectural family with GDB.
 981
 982    Register support for the specified ARCHITECTURE with GDB.  When
 983    gdbarch determines that the specified architecture has been
 984    selected, the corresponding INIT function is called.
 985
 986    --
 987
 988    The INIT function takes two parameters: INFO which contains the
 989    information available to gdbarch about the (possibly new)
 990    architecture; ARCHES which is a list of the previously created
 991    \`\`struct gdbarch'' for this architecture.
 992
 993    The INFO parameter is, as far as possible, be pre-initialized with
 994    information obtained from INFO.ABFD or the global defaults.
 995
 996    The ARCHES parameter is a linked list (sorted most recently used)
 997    of all the previously created architures for this architecture
 998    family.  The (possibly NULL) ARCHES->gdbarch can used to access
 999    values from the previously selected architecture for this
1000    architecture family.
1001
1002    The INIT function shall return any of: NULL - indicating that it
1003    doesn't recognize the selected architecture; an existing \`\`struct
1004    gdbarch'' from the ARCHES list - indicating that the new
1005    architecture is just a synonym for an earlier architecture (see
1006    gdbarch_list_lookup_by_info()); a newly created \`\`struct gdbarch''
1007    - that describes the selected architecture (see gdbarch_alloc()).
1008
1009    The DUMP_TDEP function shall print out all target specific values.
1010    Care should be taken to ensure that the function works in both the
1011    multi-arch and non- multi-arch cases. */
1012
1013 struct gdbarch_list
1014 {
1015   struct gdbarch *gdbarch;
1016   struct gdbarch_list *next;
1017 };
1018
1019 struct gdbarch_info
1020 {
1021   /* Use default: NULL (ZERO). */
1022   const struct bfd_arch_info *bfd_arch_info;
1023
1024   /* Use default: BFD_ENDIAN_UNKNOWN (NB: is not ZERO).  */
1025   int byte_order;
1026
1027   int byte_order_for_code;
1028
1029   /* Use default: NULL (ZERO). */
1030   bfd *abfd;
1031
1032   /* Use default: NULL (ZERO). */
1033   struct gdbarch_tdep_info *tdep_info;
1034
1035   /* Use default: GDB_OSABI_UNINITIALIZED (-1).  */
1036   enum gdb_osabi osabi;
1037
1038   /* Use default: NULL (ZERO).  */
1039   const struct target_desc *target_desc;
1040 };
1041
1042 typedef struct gdbarch *(gdbarch_init_ftype) (struct gdbarch_info info, struct gdbarch_list *arches);
1043 typedef void (gdbarch_dump_tdep_ftype) (struct gdbarch *gdbarch, struct ui_file *file);
1044
1045 /* DEPRECATED - use gdbarch_register() */
1046 extern void register_gdbarch_init (enum bfd_architecture architecture, gdbarch_init_ftype *);
1047
1048 extern void gdbarch_register (enum bfd_architecture architecture,
1049                               gdbarch_init_ftype *,
1050                               gdbarch_dump_tdep_ftype *);
1051
1052
1053 /* Return a freshly allocated, NULL terminated, array of the valid
1054    architecture names.  Since architectures are registered during the
1055    _initialize phase this function only returns useful information
1056    once initialization has been completed. */
1057
1058 extern const char **gdbarch_printable_names (void);
1059
1060
1061 /* Helper function.  Search the list of ARCHES for a GDBARCH that
1062    matches the information provided by INFO. */
1063
1064 extern struct gdbarch_list *gdbarch_list_lookup_by_info (struct gdbarch_list *arches, const struct gdbarch_info *info);
1065
1066
1067 /* Helper function.  Create a preliminary \`\`struct gdbarch''.  Perform
1068    basic initialization using values obtained from the INFO and TDEP
1069    parameters.  set_gdbarch_*() functions are called to complete the
1070    initialization of the object. */
1071
1072 extern struct gdbarch *gdbarch_alloc (const struct gdbarch_info *info, struct gdbarch_tdep *tdep);
1073
1074
1075 /* Helper function.  Free a partially-constructed \`\`struct gdbarch''.
1076    It is assumed that the caller freeds the \`\`struct
1077    gdbarch_tdep''. */
1078
1079 extern void gdbarch_free (struct gdbarch *);
1080
1081
1082 /* Helper function.  Allocate memory from the \`\`struct gdbarch''
1083    obstack.  The memory is freed when the corresponding architecture
1084    is also freed.  */
1085
1086 extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
1087 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
1088 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
1089
1090
1091 /* Helper function. Force an update of the current architecture.
1092
1093    The actual architecture selected is determined by INFO, \`\`(gdb) set
1094    architecture'' et.al., the existing architecture and BFD's default
1095    architecture.  INFO should be initialized to zero and then selected
1096    fields should be updated.
1097
1098    Returns non-zero if the update succeeds */
1099
1100 extern int gdbarch_update_p (struct gdbarch_info info);
1101
1102
1103 /* Helper function.  Find an architecture matching info.
1104
1105    INFO should be initialized using gdbarch_info_init, relevant fields
1106    set, and then finished using gdbarch_info_fill.
1107
1108    Returns the corresponding architecture, or NULL if no matching
1109    architecture was found.  */
1110
1111 extern struct gdbarch *gdbarch_find_by_info (struct gdbarch_info info);
1112
1113
1114 /* Helper function.  Set the global "target_gdbarch" to "gdbarch".
1115
1116    FIXME: kettenis/20031124: Of the functions that follow, only
1117    gdbarch_from_bfd is supposed to survive.  The others will
1118    dissappear since in the future GDB will (hopefully) be truly
1119    multi-arch.  However, for now we're still stuck with the concept of
1120    a single active architecture.  */
1121
1122 extern void deprecated_target_gdbarch_select_hack (struct gdbarch *gdbarch);
1123
1124
1125 /* Register per-architecture data-pointer.
1126
1127    Reserve space for a per-architecture data-pointer.  An identifier
1128    for the reserved data-pointer is returned.  That identifer should
1129    be saved in a local static variable.
1130
1131    Memory for the per-architecture data shall be allocated using
1132    gdbarch_obstack_zalloc.  That memory will be deleted when the
1133    corresponding architecture object is deleted.
1134
1135    When a previously created architecture is re-selected, the
1136    per-architecture data-pointer for that previous architecture is
1137    restored.  INIT() is not re-called.
1138
1139    Multiple registrarants for any architecture are allowed (and
1140    strongly encouraged).  */
1141
1142 struct gdbarch_data;
1143
1144 typedef void *(gdbarch_data_pre_init_ftype) (struct obstack *obstack);
1145 extern struct gdbarch_data *gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *init);
1146 typedef void *(gdbarch_data_post_init_ftype) (struct gdbarch *gdbarch);
1147 extern struct gdbarch_data *gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *init);
1148 extern void deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1149                                          struct gdbarch_data *data,
1150                                          void *pointer);
1151
1152 extern void *gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *);
1153
1154
1155 /* Set the dynamic target-system-dependent parameters (architecture,
1156    byte-order, ...) using information found in the BFD */
1157
1158 extern void set_gdbarch_from_file (bfd *);
1159
1160
1161 /* Initialize the current architecture to the "first" one we find on
1162    our list.  */
1163
1164 extern void initialize_current_architecture (void);
1165
1166 /* gdbarch trace variable */
1167 extern int gdbarch_debug;
1168
1169 extern void gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file);
1170
1171 #endif
1172 EOF
1173 exec 1>&2
1174 #../move-if-change new-gdbarch.h gdbarch.h
1175 compare_new gdbarch.h
1176
1177
1178 #
1179 # C file
1180 #
1181
1182 exec > new-gdbarch.c
1183 copyright
1184 cat <<EOF
1185
1186 #include "defs.h"
1187 #include "arch-utils.h"
1188
1189 #include "gdbcmd.h"
1190 #include "inferior.h"
1191 #include "symcat.h"
1192
1193 #include "floatformat.h"
1194
1195 #include "gdb_assert.h"
1196 #include "gdb_string.h"
1197 #include "reggroups.h"
1198 #include "osabi.h"
1199 #include "gdb_obstack.h"
1200 #include "observer.h"
1201 #include "regcache.h"
1202
1203 /* Static function declarations */
1204
1205 static void alloc_gdbarch_data (struct gdbarch *);
1206
1207 /* Non-zero if we want to trace architecture code.  */
1208
1209 #ifndef GDBARCH_DEBUG
1210 #define GDBARCH_DEBUG 0
1211 #endif
1212 int gdbarch_debug = GDBARCH_DEBUG;
1213 static void
1214 show_gdbarch_debug (struct ui_file *file, int from_tty,
1215                     struct cmd_list_element *c, const char *value)
1216 {
1217   fprintf_filtered (file, _("Architecture debugging is %s.\\n"), value);
1218 }
1219
1220 static const char *
1221 pformat (const struct floatformat **format)
1222 {
1223   if (format == NULL)
1224     return "(null)";
1225   else
1226     /* Just print out one of them - this is only for diagnostics.  */
1227     return format[0]->name;
1228 }
1229
1230 EOF
1231
1232 # gdbarch open the gdbarch object
1233 printf "\n"
1234 printf "/* Maintain the struct gdbarch object */\n"
1235 printf "\n"
1236 printf "struct gdbarch\n"
1237 printf "{\n"
1238 printf "  /* Has this architecture been fully initialized?  */\n"
1239 printf "  int initialized_p;\n"
1240 printf "\n"
1241 printf "  /* An obstack bound to the lifetime of the architecture.  */\n"
1242 printf "  struct obstack *obstack;\n"
1243 printf "\n"
1244 printf "  /* basic architectural information */\n"
1245 function_list | while do_read
1246 do
1247     if class_is_info_p
1248     then
1249         printf "  ${returntype} ${function};\n"
1250     fi
1251 done
1252 printf "\n"
1253 printf "  /* target specific vector. */\n"
1254 printf "  struct gdbarch_tdep *tdep;\n"
1255 printf "  gdbarch_dump_tdep_ftype *dump_tdep;\n"
1256 printf "\n"
1257 printf "  /* per-architecture data-pointers */\n"
1258 printf "  unsigned nr_data;\n"
1259 printf "  void **data;\n"
1260 printf "\n"
1261 printf "  /* per-architecture swap-regions */\n"
1262 printf "  struct gdbarch_swap *swap;\n"
1263 printf "\n"
1264 cat <<EOF
1265   /* Multi-arch values.
1266
1267      When extending this structure you must:
1268
1269      Add the field below.
1270
1271      Declare set/get functions and define the corresponding
1272      macro in gdbarch.h.
1273
1274      gdbarch_alloc(): If zero/NULL is not a suitable default,
1275      initialize the new field.
1276
1277      verify_gdbarch(): Confirm that the target updated the field
1278      correctly.
1279
1280      gdbarch_dump(): Add a fprintf_unfiltered call so that the new
1281      field is dumped out
1282
1283      \`\`startup_gdbarch()'': Append an initial value to the static
1284      variable (base values on the host's c-type system).
1285
1286      get_gdbarch(): Implement the set/get functions (probably using
1287      the macro's as shortcuts).
1288
1289      */
1290
1291 EOF
1292 function_list | while do_read
1293 do
1294     if class_is_variable_p
1295     then
1296         printf "  ${returntype} ${function};\n"
1297     elif class_is_function_p
1298     then
1299         printf "  gdbarch_${function}_ftype *${function};\n"
1300     fi
1301 done
1302 printf "};\n"
1303
1304 # A pre-initialized vector
1305 printf "\n"
1306 printf "\n"
1307 cat <<EOF
1308 /* The default architecture uses host values (for want of a better
1309    choice). */
1310 EOF
1311 printf "\n"
1312 printf "extern const struct bfd_arch_info bfd_default_arch_struct;\n"
1313 printf "\n"
1314 printf "struct gdbarch startup_gdbarch =\n"
1315 printf "{\n"
1316 printf "  1, /* Always initialized.  */\n"
1317 printf "  NULL, /* The obstack.  */\n"
1318 printf "  /* basic architecture information */\n"
1319 function_list | while do_read
1320 do
1321     if class_is_info_p
1322     then
1323         printf "  ${staticdefault},  /* ${function} */\n"
1324     fi
1325 done
1326 cat <<EOF
1327   /* target specific vector and its dump routine */
1328   NULL, NULL,
1329   /*per-architecture data-pointers and swap regions */
1330   0, NULL, NULL,
1331   /* Multi-arch values */
1332 EOF
1333 function_list | while do_read
1334 do
1335     if class_is_function_p || class_is_variable_p
1336     then
1337         printf "  ${staticdefault},  /* ${function} */\n"
1338     fi
1339 done
1340 cat <<EOF
1341   /* startup_gdbarch() */
1342 };
1343
1344 struct gdbarch *target_gdbarch = &startup_gdbarch;
1345 EOF
1346
1347 # Create a new gdbarch struct
1348 cat <<EOF
1349
1350 /* Create a new \`\`struct gdbarch'' based on information provided by
1351    \`\`struct gdbarch_info''. */
1352 EOF
1353 printf "\n"
1354 cat <<EOF
1355 struct gdbarch *
1356 gdbarch_alloc (const struct gdbarch_info *info,
1357                struct gdbarch_tdep *tdep)
1358 {
1359   struct gdbarch *gdbarch;
1360
1361   /* Create an obstack for allocating all the per-architecture memory,
1362      then use that to allocate the architecture vector.  */
1363   struct obstack *obstack = XMALLOC (struct obstack);
1364   obstack_init (obstack);
1365   gdbarch = obstack_alloc (obstack, sizeof (*gdbarch));
1366   memset (gdbarch, 0, sizeof (*gdbarch));
1367   gdbarch->obstack = obstack;
1368
1369   alloc_gdbarch_data (gdbarch);
1370
1371   gdbarch->tdep = tdep;
1372 EOF
1373 printf "\n"
1374 function_list | while do_read
1375 do
1376     if class_is_info_p
1377     then
1378         printf "  gdbarch->${function} = info->${function};\n"
1379     fi
1380 done
1381 printf "\n"
1382 printf "  /* Force the explicit initialization of these. */\n"
1383 function_list | while do_read
1384 do
1385     if class_is_function_p || class_is_variable_p
1386     then
1387         if [ -n "${predefault}" -a "x${predefault}" != "x0" ]
1388         then
1389           printf "  gdbarch->${function} = ${predefault};\n"
1390         fi
1391     fi
1392 done
1393 cat <<EOF
1394   /* gdbarch_alloc() */
1395
1396   return gdbarch;
1397 }
1398 EOF
1399
1400 # Free a gdbarch struct.
1401 printf "\n"
1402 printf "\n"
1403 cat <<EOF
1404 /* Allocate extra space using the per-architecture obstack.  */
1405
1406 void *
1407 gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
1408 {
1409   void *data = obstack_alloc (arch->obstack, size);
1410   memset (data, 0, size);
1411   return data;
1412 }
1413
1414
1415 /* Free a gdbarch struct.  This should never happen in normal
1416    operation --- once you've created a gdbarch, you keep it around.
1417    However, if an architecture's init function encounters an error
1418    building the structure, it may need to clean up a partially
1419    constructed gdbarch.  */
1420
1421 void
1422 gdbarch_free (struct gdbarch *arch)
1423 {
1424   struct obstack *obstack;
1425   gdb_assert (arch != NULL);
1426   gdb_assert (!arch->initialized_p);
1427   obstack = arch->obstack;
1428   obstack_free (obstack, 0); /* Includes the ARCH.  */
1429   xfree (obstack);
1430 }
1431 EOF
1432
1433 # verify a new architecture
1434 cat <<EOF
1435
1436
1437 /* Ensure that all values in a GDBARCH are reasonable.  */
1438
1439 static void
1440 verify_gdbarch (struct gdbarch *gdbarch)
1441 {
1442   struct ui_file *log;
1443   struct cleanup *cleanups;
1444   long length;
1445   char *buf;
1446   log = mem_fileopen ();
1447   cleanups = make_cleanup_ui_file_delete (log);
1448   /* fundamental */
1449   if (gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)
1450     fprintf_unfiltered (log, "\n\tbyte-order");
1451   if (gdbarch->bfd_arch_info == NULL)
1452     fprintf_unfiltered (log, "\n\tbfd_arch_info");
1453   /* Check those that need to be defined for the given multi-arch level. */
1454 EOF
1455 function_list | while do_read
1456 do
1457     if class_is_function_p || class_is_variable_p
1458     then
1459         if [ "x${invalid_p}" = "x0" ]
1460         then
1461             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1462         elif class_is_predicate_p
1463         then
1464             printf "  /* Skip verify of ${function}, has predicate */\n"
1465         # FIXME: See do_read for potential simplification
1466         elif [ -n "${invalid_p}" -a -n "${postdefault}" ]
1467         then
1468             printf "  if (${invalid_p})\n"
1469             printf "    gdbarch->${function} = ${postdefault};\n"
1470         elif [ -n "${predefault}" -a -n "${postdefault}" ]
1471         then
1472             printf "  if (gdbarch->${function} == ${predefault})\n"
1473             printf "    gdbarch->${function} = ${postdefault};\n"
1474         elif [ -n "${postdefault}" ]
1475         then
1476             printf "  if (gdbarch->${function} == 0)\n"
1477             printf "    gdbarch->${function} = ${postdefault};\n"
1478         elif [ -n "${invalid_p}" ]
1479         then
1480             printf "  if (${invalid_p})\n"
1481             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1482         elif [ -n "${predefault}" ]
1483         then
1484             printf "  if (gdbarch->${function} == ${predefault})\n"
1485             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1486         fi
1487     fi
1488 done
1489 cat <<EOF
1490   buf = ui_file_xstrdup (log, &length);
1491   make_cleanup (xfree, buf);
1492   if (length > 0)
1493     internal_error (__FILE__, __LINE__,
1494                     _("verify_gdbarch: the following are invalid ...%s"),
1495                     buf);
1496   do_cleanups (cleanups);
1497 }
1498 EOF
1499
1500 # dump the structure
1501 printf "\n"
1502 printf "\n"
1503 cat <<EOF
1504 /* Print out the details of the current architecture. */
1505
1506 void
1507 gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
1508 {
1509   const char *gdb_nm_file = "<not-defined>";
1510 #if defined (GDB_NM_FILE)
1511   gdb_nm_file = GDB_NM_FILE;
1512 #endif
1513   fprintf_unfiltered (file,
1514                       "gdbarch_dump: GDB_NM_FILE = %s\\n",
1515                       gdb_nm_file);
1516 EOF
1517 function_list | sort -t: -k 3 | while do_read
1518 do
1519     # First the predicate
1520     if class_is_predicate_p
1521     then
1522         printf "  fprintf_unfiltered (file,\n"
1523         printf "                      \"gdbarch_dump: gdbarch_${function}_p() = %%d\\\\n\",\n"
1524         printf "                      gdbarch_${function}_p (gdbarch));\n"
1525     fi
1526     # Print the corresponding value.
1527     if class_is_function_p
1528     then
1529         printf "  fprintf_unfiltered (file,\n"
1530         printf "                      \"gdbarch_dump: ${function} = <%%s>\\\\n\",\n"
1531         printf "                      host_address_to_string (gdbarch->${function}));\n"
1532     else
1533         # It is a variable
1534         case "${print}:${returntype}" in
1535             :CORE_ADDR )
1536                 fmt="%s"
1537                 print="core_addr_to_string_nz (gdbarch->${function})"
1538                 ;;
1539             :* )
1540                 fmt="%s"
1541                 print="plongest (gdbarch->${function})"
1542                 ;;
1543             * )
1544                 fmt="%s"
1545                 ;;
1546         esac
1547         printf "  fprintf_unfiltered (file,\n"
1548         printf "                      \"gdbarch_dump: ${function} = %s\\\\n\",\n" "${fmt}"
1549         printf "                      ${print});\n"
1550     fi
1551 done
1552 cat <<EOF
1553   if (gdbarch->dump_tdep != NULL)
1554     gdbarch->dump_tdep (gdbarch, file);
1555 }
1556 EOF
1557
1558
1559 # GET/SET
1560 printf "\n"
1561 cat <<EOF
1562 struct gdbarch_tdep *
1563 gdbarch_tdep (struct gdbarch *gdbarch)
1564 {
1565   if (gdbarch_debug >= 2)
1566     fprintf_unfiltered (gdb_stdlog, "gdbarch_tdep called\\n");
1567   return gdbarch->tdep;
1568 }
1569 EOF
1570 printf "\n"
1571 function_list | while do_read
1572 do
1573     if class_is_predicate_p
1574     then
1575         printf "\n"
1576         printf "int\n"
1577         printf "gdbarch_${function}_p (struct gdbarch *gdbarch)\n"
1578         printf "{\n"
1579         printf "  gdb_assert (gdbarch != NULL);\n"
1580         printf "  return ${predicate};\n"
1581         printf "}\n"
1582     fi
1583     if class_is_function_p
1584     then
1585         printf "\n"
1586         printf "${returntype}\n"
1587         if [ "x${formal}" = "xvoid" ]
1588         then
1589           printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1590         else
1591           printf "gdbarch_${function} (struct gdbarch *gdbarch, ${formal})\n"
1592         fi
1593         printf "{\n"
1594         printf "  gdb_assert (gdbarch != NULL);\n"
1595         printf "  gdb_assert (gdbarch->${function} != NULL);\n"
1596         if class_is_predicate_p && test -n "${predefault}"
1597         then
1598             # Allow a call to a function with a predicate.
1599             printf "  /* Do not check predicate: ${predicate}, allow call.  */\n"
1600         fi
1601         printf "  if (gdbarch_debug >= 2)\n"
1602         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1603         if [ "x${actual}" = "x-" -o "x${actual}" = "x" ]
1604         then
1605             if class_is_multiarch_p
1606             then
1607                 params="gdbarch"
1608             else
1609                 params=""
1610             fi
1611         else
1612             if class_is_multiarch_p
1613             then
1614                 params="gdbarch, ${actual}"
1615             else
1616                 params="${actual}"
1617             fi
1618         fi
1619         if [ "x${returntype}" = "xvoid" ]
1620         then
1621           printf "  gdbarch->${function} (${params});\n"
1622         else
1623           printf "  return gdbarch->${function} (${params});\n"
1624         fi
1625         printf "}\n"
1626         printf "\n"
1627         printf "void\n"
1628         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1629         printf "            `echo ${function} | sed -e 's/./ /g'`  gdbarch_${function}_ftype ${function})\n"
1630         printf "{\n"
1631         printf "  gdbarch->${function} = ${function};\n"
1632         printf "}\n"
1633     elif class_is_variable_p
1634     then
1635         printf "\n"
1636         printf "${returntype}\n"
1637         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1638         printf "{\n"
1639         printf "  gdb_assert (gdbarch != NULL);\n"
1640         if [ "x${invalid_p}" = "x0" ]
1641         then
1642             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1643         elif [ -n "${invalid_p}" ]
1644         then
1645             printf "  /* Check variable is valid.  */\n"
1646             printf "  gdb_assert (!(${invalid_p}));\n"
1647         elif [ -n "${predefault}" ]
1648         then
1649             printf "  /* Check variable changed from pre-default.  */\n"
1650             printf "  gdb_assert (gdbarch->${function} != ${predefault});\n"
1651         fi
1652         printf "  if (gdbarch_debug >= 2)\n"
1653         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1654         printf "  return gdbarch->${function};\n"
1655         printf "}\n"
1656         printf "\n"
1657         printf "void\n"
1658         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1659         printf "            `echo ${function} | sed -e 's/./ /g'`  ${returntype} ${function})\n"
1660         printf "{\n"
1661         printf "  gdbarch->${function} = ${function};\n"
1662         printf "}\n"
1663     elif class_is_info_p
1664     then
1665         printf "\n"
1666         printf "${returntype}\n"
1667         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1668         printf "{\n"
1669         printf "  gdb_assert (gdbarch != NULL);\n"
1670         printf "  if (gdbarch_debug >= 2)\n"
1671         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1672         printf "  return gdbarch->${function};\n"
1673         printf "}\n"
1674     fi
1675 done
1676
1677 # All the trailing guff
1678 cat <<EOF
1679
1680
1681 /* Keep a registry of per-architecture data-pointers required by GDB
1682    modules. */
1683
1684 struct gdbarch_data
1685 {
1686   unsigned index;
1687   int init_p;
1688   gdbarch_data_pre_init_ftype *pre_init;
1689   gdbarch_data_post_init_ftype *post_init;
1690 };
1691
1692 struct gdbarch_data_registration
1693 {
1694   struct gdbarch_data *data;
1695   struct gdbarch_data_registration *next;
1696 };
1697
1698 struct gdbarch_data_registry
1699 {
1700   unsigned nr;
1701   struct gdbarch_data_registration *registrations;
1702 };
1703
1704 struct gdbarch_data_registry gdbarch_data_registry =
1705 {
1706   0, NULL,
1707 };
1708
1709 static struct gdbarch_data *
1710 gdbarch_data_register (gdbarch_data_pre_init_ftype *pre_init,
1711                        gdbarch_data_post_init_ftype *post_init)
1712 {
1713   struct gdbarch_data_registration **curr;
1714   /* Append the new registraration.  */
1715   for (curr = &gdbarch_data_registry.registrations;
1716        (*curr) != NULL;
1717        curr = &(*curr)->next);
1718   (*curr) = XMALLOC (struct gdbarch_data_registration);
1719   (*curr)->next = NULL;
1720   (*curr)->data = XMALLOC (struct gdbarch_data);
1721   (*curr)->data->index = gdbarch_data_registry.nr++;
1722   (*curr)->data->pre_init = pre_init;
1723   (*curr)->data->post_init = post_init;
1724   (*curr)->data->init_p = 1;
1725   return (*curr)->data;
1726 }
1727
1728 struct gdbarch_data *
1729 gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *pre_init)
1730 {
1731   return gdbarch_data_register (pre_init, NULL);
1732 }
1733
1734 struct gdbarch_data *
1735 gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *post_init)
1736 {
1737   return gdbarch_data_register (NULL, post_init);
1738 }
1739
1740 /* Create/delete the gdbarch data vector. */
1741
1742 static void
1743 alloc_gdbarch_data (struct gdbarch *gdbarch)
1744 {
1745   gdb_assert (gdbarch->data == NULL);
1746   gdbarch->nr_data = gdbarch_data_registry.nr;
1747   gdbarch->data = GDBARCH_OBSTACK_CALLOC (gdbarch, gdbarch->nr_data, void *);
1748 }
1749
1750 /* Initialize the current value of the specified per-architecture
1751    data-pointer. */
1752
1753 void
1754 deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1755                              struct gdbarch_data *data,
1756                              void *pointer)
1757 {
1758   gdb_assert (data->index < gdbarch->nr_data);
1759   gdb_assert (gdbarch->data[data->index] == NULL);
1760   gdb_assert (data->pre_init == NULL);
1761   gdbarch->data[data->index] = pointer;
1762 }
1763
1764 /* Return the current value of the specified per-architecture
1765    data-pointer. */
1766
1767 void *
1768 gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *data)
1769 {
1770   gdb_assert (data->index < gdbarch->nr_data);
1771   if (gdbarch->data[data->index] == NULL)
1772     {
1773       /* The data-pointer isn't initialized, call init() to get a
1774          value.  */
1775       if (data->pre_init != NULL)
1776         /* Mid architecture creation: pass just the obstack, and not
1777            the entire architecture, as that way it isn't possible for
1778            pre-init code to refer to undefined architecture
1779            fields.  */
1780         gdbarch->data[data->index] = data->pre_init (gdbarch->obstack);
1781       else if (gdbarch->initialized_p
1782                && data->post_init != NULL)
1783         /* Post architecture creation: pass the entire architecture
1784            (as all fields are valid), but be careful to also detect
1785            recursive references.  */
1786         {
1787           gdb_assert (data->init_p);
1788           data->init_p = 0;
1789           gdbarch->data[data->index] = data->post_init (gdbarch);
1790           data->init_p = 1;
1791         }
1792       else
1793         /* The architecture initialization hasn't completed - punt -
1794          hope that the caller knows what they are doing.  Once
1795          deprecated_set_gdbarch_data has been initialized, this can be
1796          changed to an internal error.  */
1797         return NULL;
1798       gdb_assert (gdbarch->data[data->index] != NULL);
1799     }
1800   return gdbarch->data[data->index];
1801 }
1802
1803
1804 /* Keep a registry of the architectures known by GDB. */
1805
1806 struct gdbarch_registration
1807 {
1808   enum bfd_architecture bfd_architecture;
1809   gdbarch_init_ftype *init;
1810   gdbarch_dump_tdep_ftype *dump_tdep;
1811   struct gdbarch_list *arches;
1812   struct gdbarch_registration *next;
1813 };
1814
1815 static struct gdbarch_registration *gdbarch_registry = NULL;
1816
1817 static void
1818 append_name (const char ***buf, int *nr, const char *name)
1819 {
1820   *buf = xrealloc (*buf, sizeof (char**) * (*nr + 1));
1821   (*buf)[*nr] = name;
1822   *nr += 1;
1823 }
1824
1825 const char **
1826 gdbarch_printable_names (void)
1827 {
1828   /* Accumulate a list of names based on the registed list of
1829      architectures. */
1830   enum bfd_architecture a;
1831   int nr_arches = 0;
1832   const char **arches = NULL;
1833   struct gdbarch_registration *rego;
1834   for (rego = gdbarch_registry;
1835        rego != NULL;
1836        rego = rego->next)
1837     {
1838       const struct bfd_arch_info *ap;
1839       ap = bfd_lookup_arch (rego->bfd_architecture, 0);
1840       if (ap == NULL)
1841         internal_error (__FILE__, __LINE__,
1842                         _("gdbarch_architecture_names: multi-arch unknown"));
1843       do
1844         {
1845           append_name (&arches, &nr_arches, ap->printable_name);
1846           ap = ap->next;
1847         }
1848       while (ap != NULL);
1849     }
1850   append_name (&arches, &nr_arches, NULL);
1851   return arches;
1852 }
1853
1854
1855 void
1856 gdbarch_register (enum bfd_architecture bfd_architecture,
1857                   gdbarch_init_ftype *init,
1858                   gdbarch_dump_tdep_ftype *dump_tdep)
1859 {
1860   struct gdbarch_registration **curr;
1861   const struct bfd_arch_info *bfd_arch_info;
1862   /* Check that BFD recognizes this architecture */
1863   bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0);
1864   if (bfd_arch_info == NULL)
1865     {
1866       internal_error (__FILE__, __LINE__,
1867                       _("gdbarch: Attempt to register unknown architecture (%d)"),
1868                       bfd_architecture);
1869     }
1870   /* Check that we haven't seen this architecture before */
1871   for (curr = &gdbarch_registry;
1872        (*curr) != NULL;
1873        curr = &(*curr)->next)
1874     {
1875       if (bfd_architecture == (*curr)->bfd_architecture)
1876         internal_error (__FILE__, __LINE__,
1877                         _("gdbarch: Duplicate registraration of architecture (%s)"),
1878                         bfd_arch_info->printable_name);
1879     }
1880   /* log it */
1881   if (gdbarch_debug)
1882     fprintf_unfiltered (gdb_stdlog, "register_gdbarch_init (%s, %s)\n",
1883                         bfd_arch_info->printable_name,
1884                         host_address_to_string (init));
1885   /* Append it */
1886   (*curr) = XMALLOC (struct gdbarch_registration);
1887   (*curr)->bfd_architecture = bfd_architecture;
1888   (*curr)->init = init;
1889   (*curr)->dump_tdep = dump_tdep;
1890   (*curr)->arches = NULL;
1891   (*curr)->next = NULL;
1892 }
1893
1894 void
1895 register_gdbarch_init (enum bfd_architecture bfd_architecture,
1896                        gdbarch_init_ftype *init)
1897 {
1898   gdbarch_register (bfd_architecture, init, NULL);
1899 }
1900
1901
1902 /* Look for an architecture using gdbarch_info.  */
1903
1904 struct gdbarch_list *
1905 gdbarch_list_lookup_by_info (struct gdbarch_list *arches,
1906                              const struct gdbarch_info *info)
1907 {
1908   for (; arches != NULL; arches = arches->next)
1909     {
1910       if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info)
1911         continue;
1912       if (info->byte_order != arches->gdbarch->byte_order)
1913         continue;
1914       if (info->osabi != arches->gdbarch->osabi)
1915         continue;
1916       if (info->target_desc != arches->gdbarch->target_desc)
1917         continue;
1918       return arches;
1919     }
1920   return NULL;
1921 }
1922
1923
1924 /* Find an architecture that matches the specified INFO.  Create a new
1925    architecture if needed.  Return that new architecture.  */
1926
1927 struct gdbarch *
1928 gdbarch_find_by_info (struct gdbarch_info info)
1929 {
1930   struct gdbarch *new_gdbarch;
1931   struct gdbarch_registration *rego;
1932
1933   /* Fill in missing parts of the INFO struct using a number of
1934      sources: "set ..."; INFOabfd supplied; and the global
1935      defaults.  */
1936   gdbarch_info_fill (&info);
1937
1938   /* Must have found some sort of architecture. */
1939   gdb_assert (info.bfd_arch_info != NULL);
1940
1941   if (gdbarch_debug)
1942     {
1943       fprintf_unfiltered (gdb_stdlog,
1944                           "gdbarch_find_by_info: info.bfd_arch_info %s\n",
1945                           (info.bfd_arch_info != NULL
1946                            ? info.bfd_arch_info->printable_name
1947                            : "(null)"));
1948       fprintf_unfiltered (gdb_stdlog,
1949                           "gdbarch_find_by_info: info.byte_order %d (%s)\n",
1950                           info.byte_order,
1951                           (info.byte_order == BFD_ENDIAN_BIG ? "big"
1952                            : info.byte_order == BFD_ENDIAN_LITTLE ? "little"
1953                            : "default"));
1954       fprintf_unfiltered (gdb_stdlog,
1955                           "gdbarch_find_by_info: info.osabi %d (%s)\n",
1956                           info.osabi, gdbarch_osabi_name (info.osabi));
1957       fprintf_unfiltered (gdb_stdlog,
1958                           "gdbarch_find_by_info: info.abfd %s\n",
1959                           host_address_to_string (info.abfd));
1960       fprintf_unfiltered (gdb_stdlog,
1961                           "gdbarch_find_by_info: info.tdep_info %s\n",
1962                           host_address_to_string (info.tdep_info));
1963     }
1964
1965   /* Find the tdep code that knows about this architecture.  */
1966   for (rego = gdbarch_registry;
1967        rego != NULL;
1968        rego = rego->next)
1969     if (rego->bfd_architecture == info.bfd_arch_info->arch)
1970       break;
1971   if (rego == NULL)
1972     {
1973       if (gdbarch_debug)
1974         fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
1975                             "No matching architecture\n");
1976       return 0;
1977     }
1978
1979   /* Ask the tdep code for an architecture that matches "info".  */
1980   new_gdbarch = rego->init (info, rego->arches);
1981
1982   /* Did the tdep code like it?  No.  Reject the change and revert to
1983      the old architecture.  */
1984   if (new_gdbarch == NULL)
1985     {
1986       if (gdbarch_debug)
1987         fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
1988                             "Target rejected architecture\n");
1989       return NULL;
1990     }
1991
1992   /* Is this a pre-existing architecture (as determined by already
1993      being initialized)?  Move it to the front of the architecture
1994      list (keeping the list sorted Most Recently Used).  */
1995   if (new_gdbarch->initialized_p)
1996     {
1997       struct gdbarch_list **list;
1998       struct gdbarch_list *this;
1999       if (gdbarch_debug)
2000         fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
2001                             "Previous architecture %s (%s) selected\n",
2002                             host_address_to_string (new_gdbarch),
2003                             new_gdbarch->bfd_arch_info->printable_name);
2004       /* Find the existing arch in the list.  */
2005       for (list = &rego->arches;
2006            (*list) != NULL && (*list)->gdbarch != new_gdbarch;
2007            list = &(*list)->next);
2008       /* It had better be in the list of architectures.  */
2009       gdb_assert ((*list) != NULL && (*list)->gdbarch == new_gdbarch);
2010       /* Unlink THIS.  */
2011       this = (*list);
2012       (*list) = this->next;
2013       /* Insert THIS at the front.  */
2014       this->next = rego->arches;
2015       rego->arches = this;
2016       /* Return it.  */
2017       return new_gdbarch;
2018     }
2019
2020   /* It's a new architecture.  */
2021   if (gdbarch_debug)
2022     fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
2023                         "New architecture %s (%s) selected\n",
2024                         host_address_to_string (new_gdbarch),
2025                         new_gdbarch->bfd_arch_info->printable_name);
2026
2027   /* Insert the new architecture into the front of the architecture
2028      list (keep the list sorted Most Recently Used).  */
2029   {
2030     struct gdbarch_list *this = XMALLOC (struct gdbarch_list);
2031     this->next = rego->arches;
2032     this->gdbarch = new_gdbarch;
2033     rego->arches = this;
2034   }
2035
2036   /* Check that the newly installed architecture is valid.  Plug in
2037      any post init values.  */
2038   new_gdbarch->dump_tdep = rego->dump_tdep;
2039   verify_gdbarch (new_gdbarch);
2040   new_gdbarch->initialized_p = 1;
2041
2042   if (gdbarch_debug)
2043     gdbarch_dump (new_gdbarch, gdb_stdlog);
2044
2045   return new_gdbarch;
2046 }
2047
2048 /* Make the specified architecture current.  */
2049
2050 void
2051 deprecated_target_gdbarch_select_hack (struct gdbarch *new_gdbarch)
2052 {
2053   gdb_assert (new_gdbarch != NULL);
2054   gdb_assert (new_gdbarch->initialized_p);
2055   target_gdbarch = new_gdbarch;
2056   observer_notify_architecture_changed (new_gdbarch);
2057   registers_changed ();
2058 }
2059
2060 extern void _initialize_gdbarch (void);
2061
2062 void
2063 _initialize_gdbarch (void)
2064 {
2065   struct cmd_list_element *c;
2066
2067   add_setshow_zinteger_cmd ("arch", class_maintenance, &gdbarch_debug, _("\\
2068 Set architecture debugging."), _("\\
2069 Show architecture debugging."), _("\\
2070 When non-zero, architecture debugging is enabled."),
2071                             NULL,
2072                             show_gdbarch_debug,
2073                             &setdebuglist, &showdebuglist);
2074 }
2075 EOF
2076
2077 # close things off
2078 exec 1>&2
2079 #../move-if-change new-gdbarch.c gdbarch.c
2080 compare_new gdbarch.c