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 f:CORE_ADDR:pointer_to_address:struct type *type, const gdb_byte *buf:type, buf::unsigned_pointer_to_address::0
 470 f: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 f: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 # Given a vector of command-line arguments, return a newly allocated
 579 # string which, when passed to the create_inferior function, will be
 580 # parsed (on Unix systems, by the shell) to yield the same vector.
 581 # This function should call error() if the argument vector is not
 582 # representable for this target or if this target does not support
 583 # command-line arguments.
 584 # ARGC is the number of elements in the vector.
 585 # ARGV is an array of strings, one per argument.
 586 m:char *:construct_inferior_arguments:int argc, char **argv:argc, argv::construct_inferior_arguments::0
 587 f:void:elf_make_msymbol_special:asymbol *sym, struct minimal_symbol *msym:sym, msym::default_elf_make_msymbol_special::0
 588 f:void:coff_make_msymbol_special:int val, struct minimal_symbol *msym:val, msym::default_coff_make_msymbol_special::0
 589 v:int:cannot_step_breakpoint:::0:0::0
 590 v:int:have_nonsteppable_watchpoint:::0:0::0
 591 F:int:address_class_type_flags:int byte_size, int dwarf2_addr_class:byte_size, dwarf2_addr_class
 592 M:const char *:address_class_type_flags_to_name:int type_flags:type_flags
 593 M:int:address_class_name_to_type_flags:const char *name, int *type_flags_ptr:name, type_flags_ptr
 594 # Is a register in a group
 595 m:int:register_reggroup_p:int regnum, struct reggroup *reggroup:regnum, reggroup::default_register_reggroup_p::0
 596 # Fetch the pointer to the ith function argument.
 597 F:CORE_ADDR:fetch_pointer_argument:struct frame_info *frame, int argi, struct type *type:frame, argi, type
 598
 599 # Return the appropriate register set for a core file section with
 600 # name SECT_NAME and size SECT_SIZE.
 601 M:const struct regset *:regset_from_core_section:const char *sect_name, size_t sect_size:sect_name, sect_size
 602
 603 # When creating core dumps, some systems encode the PID in addition
 604 # to the LWP id in core file register section names.  In those cases, the
 605 # "XXX" in ".reg/XXX" is encoded as [LWPID << 16 | PID].  This setting
 606 # is set to true for such architectures; false if "XXX" represents an LWP
 607 # or thread id with no special encoding.
 608 v:int:core_reg_section_encodes_pid:::0:0::0
 609
 610 # Supported register notes in a core file.
 611 v:struct core_regset_section *:core_regset_sections:const char *name, int len::::::host_address_to_string (gdbarch->core_regset_sections)
 612
 613 # Read offset OFFSET of TARGET_OBJECT_LIBRARIES formatted shared libraries list from
 614 # core file into buffer READBUF with length LEN.
 615 M:LONGEST:core_xfer_shared_libraries:gdb_byte *readbuf, ULONGEST offset, LONGEST len:readbuf, offset, len
 616
 617 # If the elements of C++ vtables are in-place function descriptors rather
 618 # than normal function pointers (which may point to code or a descriptor),
 619 # set this to one.
 620 v:int:vtable_function_descriptors:::0:0::0
 621
 622 # Set if the least significant bit of the delta is used instead of the least
 623 # significant bit of the pfn for pointers to virtual member functions.
 624 v:int:vbit_in_delta:::0:0::0
 625
 626 # Advance PC to next instruction in order to skip a permanent breakpoint.
 627 F:void:skip_permanent_breakpoint:struct regcache *regcache:regcache
 628
 629 # The maximum length of an instruction on this architecture.
 630 V:ULONGEST:max_insn_length:::0:0
 631
 632 # Copy the instruction at FROM to TO, and make any adjustments
 633 # necessary to single-step it at that address.
 634 #
 635 # REGS holds the state the thread's registers will have before
 636 # executing the copied instruction; the PC in REGS will refer to FROM,
 637 # not the copy at TO.  The caller should update it to point at TO later.
 638 #
 639 # Return a pointer to data of the architecture's choice to be passed
 640 # to gdbarch_displaced_step_fixup.  Or, return NULL to indicate that
 641 # the instruction's effects have been completely simulated, with the
 642 # resulting state written back to REGS.
 643 #
 644 # For a general explanation of displaced stepping and how GDB uses it,
 645 # see the comments in infrun.c.
 646 #
 647 # The TO area is only guaranteed to have space for
 648 # gdbarch_max_insn_length (arch) bytes, so this function must not
 649 # write more bytes than that to that area.
 650 #
 651 # If you do not provide this function, GDB assumes that the
 652 # architecture does not support displaced stepping.
 653 #
 654 # If your architecture doesn't need to adjust instructions before
 655 # single-stepping them, consider using simple_displaced_step_copy_insn
 656 # here.
 657 M:struct displaced_step_closure *:displaced_step_copy_insn:CORE_ADDR from, CORE_ADDR to, struct regcache *regs:from, to, regs
 658
 659 # Fix up the state resulting from successfully single-stepping a
 660 # displaced instruction, to give the result we would have gotten from
 661 # stepping the instruction in its original location.
 662 #
 663 # REGS is the register state resulting from single-stepping the
 664 # displaced instruction.
 665 #
 666 # CLOSURE is the result from the matching call to
 667 # gdbarch_displaced_step_copy_insn.
 668 #
 669 # If you provide gdbarch_displaced_step_copy_insn.but not this
 670 # function, then GDB assumes that no fixup is needed after
 671 # single-stepping the instruction.
 672 #
 673 # For a general explanation of displaced stepping and how GDB uses it,
 674 # see the comments in infrun.c.
 675 M:void:displaced_step_fixup:struct displaced_step_closure *closure, CORE_ADDR from, CORE_ADDR to, struct regcache *regs:closure, from, to, regs::NULL
 676
 677 # Free a closure returned by gdbarch_displaced_step_copy_insn.
 678 #
 679 # If you provide gdbarch_displaced_step_copy_insn, you must provide
 680 # this function as well.
 681 #
 682 # If your architecture uses closures that don't need to be freed, then
 683 # you can use simple_displaced_step_free_closure here.
 684 #
 685 # For a general explanation of displaced stepping and how GDB uses it,
 686 # see the comments in infrun.c.
 687 m:void:displaced_step_free_closure:struct displaced_step_closure *closure:closure::NULL::(! gdbarch->displaced_step_free_closure) != (! gdbarch->displaced_step_copy_insn)
 688
 689 # Return the address of an appropriate place to put displaced
 690 # instructions while we step over them.  There need only be one such
 691 # place, since we're only stepping one thread over a breakpoint at a
 692 # time.
 693 #
 694 # For a general explanation of displaced stepping and how GDB uses it,
 695 # see the comments in infrun.c.
 696 m:CORE_ADDR:displaced_step_location:void:::NULL::(! gdbarch->displaced_step_location) != (! gdbarch->displaced_step_copy_insn)
 697
 698 # Refresh overlay mapped state for section OSECT.
 699 F:void:overlay_update:struct obj_section *osect:osect
 700
 701 M:const struct target_desc *:core_read_description:struct target_ops *target, bfd *abfd:target, abfd
 702
 703 # Handle special encoding of static variables in stabs debug info.
 704 F:char *:static_transform_name:char *name:name
 705 # Set if the address in N_SO or N_FUN stabs may be zero.
 706 v:int:sofun_address_maybe_missing:::0:0::0
 707
 708 # Signal translation: translate inferior's signal (host's) number into
 709 # GDB's representation.
 710 m:enum target_signal:target_signal_from_host:int signo:signo::default_target_signal_from_host::0
 711 # Signal translation: translate GDB's signal number into inferior's host
 712 # signal number.
 713 m:int:target_signal_to_host:enum target_signal ts:ts::default_target_signal_to_host::0
 714
 715 # Extra signal info inspection.
 716 #
 717 # Return a type suitable to inspect extra signal information.
 718 M:struct type *:get_siginfo_type:void:
 719
 720 # Record architecture-specific information from the symbol table.
 721 M:void:record_special_symbol:struct objfile *objfile, asymbol *sym:objfile, sym
 722
 723 # True if the list of shared libraries is one and only for all
 724 # processes, as opposed to a list of shared libraries per inferior.
 725 # When this property is true, GDB assumes that since shared libraries
 726 # are shared across processes, so is all code.  Hence, GDB further
 727 # assumes an inserted breakpoint location is visible to all processes.
 728 v:int:has_global_solist:::0:0::0
 729 EOF
 730 }
 731
 732 #
 733 # The .log file
 734 #
 735 exec > new-gdbarch.log
 736 function_list | while do_read
 737 do
 738     cat <<EOF
 739 ${class} ${returntype} ${function} ($formal)
 740 EOF
 741     for r in ${read}
 742     do
 743         eval echo \"\ \ \ \ ${r}=\${${r}}\"
 744     done
 745     if class_is_predicate_p && fallback_default_p
 746     then
 747         echo "Error: predicate function ${function} can not have a non- multi-arch default" 1>&2
 748         kill $$
 749         exit 1
 750     fi
 751     if [ "x${invalid_p}" = "x0" -a -n "${postdefault}" ]
 752     then
 753         echo "Error: postdefault is useless when invalid_p=0" 1>&2
 754         kill $$
 755         exit 1
 756     fi
 757     if class_is_multiarch_p
 758     then
 759         if class_is_predicate_p ; then :
 760         elif test "x${predefault}" = "x"
 761         then
 762             echo "Error: pure multi-arch function ${function} must have a predefault" 1>&2
 763             kill $$
 764             exit 1
 765         fi
 766     fi
 767     echo ""
 768 done
 769
 770 exec 1>&2
 771 compare_new gdbarch.log
 772
 773
 774 copyright ()
 775 {
 776 cat <<EOF
 777 /* *INDENT-OFF* */ /* THIS FILE IS GENERATED */
 778
 779 /* Dynamic architecture support for GDB, the GNU debugger.
 780
 781    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
 782    Free Software Foundation, Inc.
 783
 784    This file is part of GDB.
 785
 786    This program is free software; you can redistribute it and/or modify
 787    it under the terms of the GNU General Public License as published by
 788    the Free Software Foundation; either version 3 of the License, or
 789    (at your option) any later version.
 790
 791    This program is distributed in the hope that it will be useful,
 792    but WITHOUT ANY WARRANTY; without even the implied warranty of
 793    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 794    GNU General Public License for more details.
 795
 796    You should have received a copy of the GNU General Public License
 797    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 798
 799 /* This file was created with the aid of \`\`gdbarch.sh''.
 800
 801    The Bourne shell script \`\`gdbarch.sh'' creates the files
 802    \`\`new-gdbarch.c'' and \`\`new-gdbarch.h and then compares them
 803    against the existing \`\`gdbarch.[hc]''.  Any differences found
 804    being reported.
 805
 806    If editing this file, please also run gdbarch.sh and merge any
 807    changes into that script. Conversely, when making sweeping changes
 808    to this file, modifying gdbarch.sh and using its output may prove
 809    easier. */
 810
 811 EOF
 812 }
 813
 814 #
 815 # The .h file
 816 #
 817
 818 exec > new-gdbarch.h
 819 copyright
 820 cat <<EOF
 821 #ifndef GDBARCH_H
 822 #define GDBARCH_H
 823
 824 struct floatformat;
 825 struct ui_file;
 826 struct frame_info;
 827 struct value;
 828 struct objfile;
 829 struct obj_section;
 830 struct minimal_symbol;
 831 struct regcache;
 832 struct reggroup;
 833 struct regset;
 834 struct disassemble_info;
 835 struct target_ops;
 836 struct obstack;
 837 struct bp_target_info;
 838 struct target_desc;
 839 struct displaced_step_closure;
 840 struct core_regset_section;
 841
 842 extern struct gdbarch *current_gdbarch;
 843 extern struct gdbarch *target_gdbarch;
 844 EOF
 845
 846 # function typedef's
 847 printf "\n"
 848 printf "\n"
 849 printf "/* The following are pre-initialized by GDBARCH. */\n"
 850 function_list | while do_read
 851 do
 852     if class_is_info_p
 853     then
 854         printf "\n"
 855         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 856         printf "/* set_gdbarch_${function}() - not applicable - pre-initialized. */\n"
 857     fi
 858 done
 859
 860 # function typedef's
 861 printf "\n"
 862 printf "\n"
 863 printf "/* The following are initialized by the target dependent code. */\n"
 864 function_list | while do_read
 865 do
 866     if [ -n "${comment}" ]
 867     then
 868         echo "${comment}" | sed \
 869             -e '2 s,#,/*,' \
 870             -e '3,$ s,#,  ,' \
 871             -e '$ s,$, */,'
 872     fi
 873
 874     if class_is_predicate_p
 875     then
 876         printf "\n"
 877         printf "extern int gdbarch_${function}_p (struct gdbarch *gdbarch);\n"
 878     fi
 879     if class_is_variable_p
 880     then
 881         printf "\n"
 882         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 883         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, ${returntype} ${function});\n"
 884     fi
 885     if class_is_function_p
 886     then
 887         printf "\n"
 888         if [ "x${formal}" = "xvoid" ] && class_is_multiarch_p
 889         then
 890             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch);\n"
 891         elif class_is_multiarch_p
 892         then
 893             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch, ${formal});\n"
 894         else
 895             printf "typedef ${returntype} (gdbarch_${function}_ftype) (${formal});\n"
 896         fi
 897         if [ "x${formal}" = "xvoid" ]
 898         then
 899           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 900         else
 901           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch, ${formal});\n"
 902         fi
 903         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, gdbarch_${function}_ftype *${function});\n"
 904     fi
 905 done
 906
 907 # close it off
 908 cat <<EOF
 909
 910 extern struct gdbarch_tdep *gdbarch_tdep (struct gdbarch *gdbarch);
 911
 912
 913 /* Mechanism for co-ordinating the selection of a specific
 914    architecture.
 915
 916    GDB targets (*-tdep.c) can register an interest in a specific
 917    architecture.  Other GDB components can register a need to maintain
 918    per-architecture data.
 919
 920    The mechanisms below ensures that there is only a loose connection
 921    between the set-architecture command and the various GDB
 922    components.  Each component can independently register their need
 923    to maintain architecture specific data with gdbarch.
 924
 925    Pragmatics:
 926
 927    Previously, a single TARGET_ARCHITECTURE_HOOK was provided.  It
 928    didn't scale.
 929
 930    The more traditional mega-struct containing architecture specific
 931    data for all the various GDB components was also considered.  Since
 932    GDB is built from a variable number of (fairly independent)
 933    components it was determined that the global aproach was not
 934    applicable. */
 935
 936
 937 /* Register a new architectural family with GDB.
 938
 939    Register support for the specified ARCHITECTURE with GDB.  When
 940    gdbarch determines that the specified architecture has been
 941    selected, the corresponding INIT function is called.
 942
 943    --
 944
 945    The INIT function takes two parameters: INFO which contains the
 946    information available to gdbarch about the (possibly new)
 947    architecture; ARCHES which is a list of the previously created
 948    \`\`struct gdbarch'' for this architecture.
 949
 950    The INFO parameter is, as far as possible, be pre-initialized with
 951    information obtained from INFO.ABFD or the global defaults.
 952
 953    The ARCHES parameter is a linked list (sorted most recently used)
 954    of all the previously created architures for this architecture
 955    family.  The (possibly NULL) ARCHES->gdbarch can used to access
 956    values from the previously selected architecture for this
 957    architecture family.  The global \`\`current_gdbarch'' shall not be
 958    used.
 959
 960    The INIT function shall return any of: NULL - indicating that it
 961    doesn't recognize the selected architecture; an existing \`\`struct
 962    gdbarch'' from the ARCHES list - indicating that the new
 963    architecture is just a synonym for an earlier architecture (see
 964    gdbarch_list_lookup_by_info()); a newly created \`\`struct gdbarch''
 965    - that describes the selected architecture (see gdbarch_alloc()).
 966
 967    The DUMP_TDEP function shall print out all target specific values.
 968    Care should be taken to ensure that the function works in both the
 969    multi-arch and non- multi-arch cases. */
 970
 971 struct gdbarch_list
 972 {
 973   struct gdbarch *gdbarch;
 974   struct gdbarch_list *next;
 975 };
 976
 977 struct gdbarch_info
 978 {
 979   /* Use default: NULL (ZERO). */
 980   const struct bfd_arch_info *bfd_arch_info;
 981
 982   /* Use default: BFD_ENDIAN_UNKNOWN (NB: is not ZERO).  */
 983   int byte_order;
 984
 985   int byte_order_for_code;
 986
 987   /* Use default: NULL (ZERO). */
 988   bfd *abfd;
 989
 990   /* Use default: NULL (ZERO). */
 991   struct gdbarch_tdep_info *tdep_info;
 992
 993   /* Use default: GDB_OSABI_UNINITIALIZED (-1).  */
 994   enum gdb_osabi osabi;
 995
 996   /* Use default: NULL (ZERO).  */
 997   const struct target_desc *target_desc;
 998 };
 999
1000 typedef struct gdbarch *(gdbarch_init_ftype) (struct gdbarch_info info, struct gdbarch_list *arches);
1001 typedef void (gdbarch_dump_tdep_ftype) (struct gdbarch *gdbarch, struct ui_file *file);
1002
1003 /* DEPRECATED - use gdbarch_register() */
1004 extern void register_gdbarch_init (enum bfd_architecture architecture, gdbarch_init_ftype *);
1005
1006 extern void gdbarch_register (enum bfd_architecture architecture,
1007                               gdbarch_init_ftype *,
1008                               gdbarch_dump_tdep_ftype *);
1009
1010
1011 /* Return a freshly allocated, NULL terminated, array of the valid
1012    architecture names.  Since architectures are registered during the
1013    _initialize phase this function only returns useful information
1014    once initialization has been completed. */
1015
1016 extern const char **gdbarch_printable_names (void);
1017
1018
1019 /* Helper function.  Search the list of ARCHES for a GDBARCH that
1020    matches the information provided by INFO. */
1021
1022 extern struct gdbarch_list *gdbarch_list_lookup_by_info (struct gdbarch_list *arches, const struct gdbarch_info *info);
1023
1024
1025 /* Helper function.  Create a preliminary \`\`struct gdbarch''.  Perform
1026    basic initialization using values obtained from the INFO and TDEP
1027    parameters.  set_gdbarch_*() functions are called to complete the
1028    initialization of the object. */
1029
1030 extern struct gdbarch *gdbarch_alloc (const struct gdbarch_info *info, struct gdbarch_tdep *tdep);
1031
1032
1033 /* Helper function.  Free a partially-constructed \`\`struct gdbarch''.
1034    It is assumed that the caller freeds the \`\`struct
1035    gdbarch_tdep''. */
1036
1037 extern void gdbarch_free (struct gdbarch *);
1038
1039
1040 /* Helper function.  Allocate memory from the \`\`struct gdbarch''
1041    obstack.  The memory is freed when the corresponding architecture
1042    is also freed.  */
1043
1044 extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
1045 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
1046 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
1047
1048
1049 /* Helper function. Force an update of the current architecture.
1050
1051    The actual architecture selected is determined by INFO, \`\`(gdb) set
1052    architecture'' et.al., the existing architecture and BFD's default
1053    architecture.  INFO should be initialized to zero and then selected
1054    fields should be updated.
1055
1056    Returns non-zero if the update succeeds */
1057
1058 extern int gdbarch_update_p (struct gdbarch_info info);
1059
1060
1061 /* Helper function.  Find an architecture matching info.
1062
1063    INFO should be initialized using gdbarch_info_init, relevant fields
1064    set, and then finished using gdbarch_info_fill.
1065
1066    Returns the corresponding architecture, or NULL if no matching
1067    architecture was found.  "current_gdbarch" is not updated.  */
1068
1069 extern struct gdbarch *gdbarch_find_by_info (struct gdbarch_info info);
1070
1071
1072 /* Helper function.  Set the global "current_gdbarch" to "gdbarch".
1073
1074    FIXME: kettenis/20031124: Of the functions that follow, only
1075    gdbarch_from_bfd is supposed to survive.  The others will
1076    dissappear since in the future GDB will (hopefully) be truly
1077    multi-arch.  However, for now we're still stuck with the concept of
1078    a single active architecture.  */
1079
1080 extern void deprecated_current_gdbarch_select_hack (struct gdbarch *gdbarch);
1081
1082
1083 /* Register per-architecture data-pointer.
1084
1085    Reserve space for a per-architecture data-pointer.  An identifier
1086    for the reserved data-pointer is returned.  That identifer should
1087    be saved in a local static variable.
1088
1089    Memory for the per-architecture data shall be allocated using
1090    gdbarch_obstack_zalloc.  That memory will be deleted when the
1091    corresponding architecture object is deleted.
1092
1093    When a previously created architecture is re-selected, the
1094    per-architecture data-pointer for that previous architecture is
1095    restored.  INIT() is not re-called.
1096
1097    Multiple registrarants for any architecture are allowed (and
1098    strongly encouraged).  */
1099
1100 struct gdbarch_data;
1101
1102 typedef void *(gdbarch_data_pre_init_ftype) (struct obstack *obstack);
1103 extern struct gdbarch_data *gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *init);
1104 typedef void *(gdbarch_data_post_init_ftype) (struct gdbarch *gdbarch);
1105 extern struct gdbarch_data *gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *init);
1106 extern void deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1107                                          struct gdbarch_data *data,
1108                                          void *pointer);
1109
1110 extern void *gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *);
1111
1112
1113 /* Set the dynamic target-system-dependent parameters (architecture,
1114    byte-order, ...) using information found in the BFD */
1115
1116 extern void set_gdbarch_from_file (bfd *);
1117
1118
1119 /* Initialize the current architecture to the "first" one we find on
1120    our list.  */
1121
1122 extern void initialize_current_architecture (void);
1123
1124 /* gdbarch trace variable */
1125 extern int gdbarch_debug;
1126
1127 extern void gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file);
1128
1129 #endif
1130 EOF
1131 exec 1>&2
1132 #../move-if-change new-gdbarch.h gdbarch.h
1133 compare_new gdbarch.h
1134
1135
1136 #
1137 # C file
1138 #
1139
1140 exec > new-gdbarch.c
1141 copyright
1142 cat <<EOF
1143
1144 #include "defs.h"
1145 #include "arch-utils.h"
1146
1147 #include "gdbcmd.h"
1148 #include "inferior.h"
1149 #include "symcat.h"
1150
1151 #include "floatformat.h"
1152
1153 #include "gdb_assert.h"
1154 #include "gdb_string.h"
1155 #include "reggroups.h"
1156 #include "osabi.h"
1157 #include "gdb_obstack.h"
1158 #include "observer.h"
1159 #include "regcache.h"
1160
1161 /* Static function declarations */
1162
1163 static void alloc_gdbarch_data (struct gdbarch *);
1164
1165 /* Non-zero if we want to trace architecture code.  */
1166
1167 #ifndef GDBARCH_DEBUG
1168 #define GDBARCH_DEBUG 0
1169 #endif
1170 int gdbarch_debug = GDBARCH_DEBUG;
1171 static void
1172 show_gdbarch_debug (struct ui_file *file, int from_tty,
1173                     struct cmd_list_element *c, const char *value)
1174 {
1175   fprintf_filtered (file, _("Architecture debugging is %s.\\n"), value);
1176 }
1177
1178 static const char *
1179 pformat (const struct floatformat **format)
1180 {
1181   if (format == NULL)
1182     return "(null)";
1183   else
1184     /* Just print out one of them - this is only for diagnostics.  */
1185     return format[0]->name;
1186 }
1187
1188 EOF
1189
1190 # gdbarch open the gdbarch object
1191 printf "\n"
1192 printf "/* Maintain the struct gdbarch object */\n"
1193 printf "\n"
1194 printf "struct gdbarch\n"
1195 printf "{\n"
1196 printf "  /* Has this architecture been fully initialized?  */\n"
1197 printf "  int initialized_p;\n"
1198 printf "\n"
1199 printf "  /* An obstack bound to the lifetime of the architecture.  */\n"
1200 printf "  struct obstack *obstack;\n"
1201 printf "\n"
1202 printf "  /* basic architectural information */\n"
1203 function_list | while do_read
1204 do
1205     if class_is_info_p
1206     then
1207         printf "  ${returntype} ${function};\n"
1208     fi
1209 done
1210 printf "\n"
1211 printf "  /* target specific vector. */\n"
1212 printf "  struct gdbarch_tdep *tdep;\n"
1213 printf "  gdbarch_dump_tdep_ftype *dump_tdep;\n"
1214 printf "\n"
1215 printf "  /* per-architecture data-pointers */\n"
1216 printf "  unsigned nr_data;\n"
1217 printf "  void **data;\n"
1218 printf "\n"
1219 printf "  /* per-architecture swap-regions */\n"
1220 printf "  struct gdbarch_swap *swap;\n"
1221 printf "\n"
1222 cat <<EOF
1223   /* Multi-arch values.
1224
1225      When extending this structure you must:
1226
1227      Add the field below.
1228
1229      Declare set/get functions and define the corresponding
1230      macro in gdbarch.h.
1231
1232      gdbarch_alloc(): If zero/NULL is not a suitable default,
1233      initialize the new field.
1234
1235      verify_gdbarch(): Confirm that the target updated the field
1236      correctly.
1237
1238      gdbarch_dump(): Add a fprintf_unfiltered call so that the new
1239      field is dumped out
1240
1241      \`\`startup_gdbarch()'': Append an initial value to the static
1242      variable (base values on the host's c-type system).
1243
1244      get_gdbarch(): Implement the set/get functions (probably using
1245      the macro's as shortcuts).
1246
1247      */
1248
1249 EOF
1250 function_list | while do_read
1251 do
1252     if class_is_variable_p
1253     then
1254         printf "  ${returntype} ${function};\n"
1255     elif class_is_function_p
1256     then
1257         printf "  gdbarch_${function}_ftype *${function};\n"
1258     fi
1259 done
1260 printf "};\n"
1261
1262 # A pre-initialized vector
1263 printf "\n"
1264 printf "\n"
1265 cat <<EOF
1266 /* The default architecture uses host values (for want of a better
1267    choice). */
1268 EOF
1269 printf "\n"
1270 printf "extern const struct bfd_arch_info bfd_default_arch_struct;\n"
1271 printf "\n"
1272 printf "struct gdbarch startup_gdbarch =\n"
1273 printf "{\n"
1274 printf "  1, /* Always initialized.  */\n"
1275 printf "  NULL, /* The obstack.  */\n"
1276 printf "  /* basic architecture information */\n"
1277 function_list | while do_read
1278 do
1279     if class_is_info_p
1280     then
1281         printf "  ${staticdefault},  /* ${function} */\n"
1282     fi
1283 done
1284 cat <<EOF
1285   /* target specific vector and its dump routine */
1286   NULL, NULL,
1287   /*per-architecture data-pointers and swap regions */
1288   0, NULL, NULL,
1289   /* Multi-arch values */
1290 EOF
1291 function_list | while do_read
1292 do
1293     if class_is_function_p || class_is_variable_p
1294     then
1295         printf "  ${staticdefault},  /* ${function} */\n"
1296     fi
1297 done
1298 cat <<EOF
1299   /* startup_gdbarch() */
1300 };
1301
1302 struct gdbarch *current_gdbarch = &startup_gdbarch;
1303 struct gdbarch *target_gdbarch = &startup_gdbarch;
1304 EOF
1305
1306 # Create a new gdbarch struct
1307 cat <<EOF
1308
1309 /* Create a new \`\`struct gdbarch'' based on information provided by
1310    \`\`struct gdbarch_info''. */
1311 EOF
1312 printf "\n"
1313 cat <<EOF
1314 struct gdbarch *
1315 gdbarch_alloc (const struct gdbarch_info *info,
1316                struct gdbarch_tdep *tdep)
1317 {
1318   struct gdbarch *gdbarch;
1319
1320   /* Create an obstack for allocating all the per-architecture memory,
1321      then use that to allocate the architecture vector.  */
1322   struct obstack *obstack = XMALLOC (struct obstack);
1323   obstack_init (obstack);
1324   gdbarch = obstack_alloc (obstack, sizeof (*gdbarch));
1325   memset (gdbarch, 0, sizeof (*gdbarch));
1326   gdbarch->obstack = obstack;
1327
1328   alloc_gdbarch_data (gdbarch);
1329
1330   gdbarch->tdep = tdep;
1331 EOF
1332 printf "\n"
1333 function_list | while do_read
1334 do
1335     if class_is_info_p
1336     then
1337         printf "  gdbarch->${function} = info->${function};\n"
1338     fi
1339 done
1340 printf "\n"
1341 printf "  /* Force the explicit initialization of these. */\n"
1342 function_list | while do_read
1343 do
1344     if class_is_function_p || class_is_variable_p
1345     then
1346         if [ -n "${predefault}" -a "x${predefault}" != "x0" ]
1347         then
1348           printf "  gdbarch->${function} = ${predefault};\n"
1349         fi
1350     fi
1351 done
1352 cat <<EOF
1353   /* gdbarch_alloc() */
1354
1355   return gdbarch;
1356 }
1357 EOF
1358
1359 # Free a gdbarch struct.
1360 printf "\n"
1361 printf "\n"
1362 cat <<EOF
1363 /* Allocate extra space using the per-architecture obstack.  */
1364
1365 void *
1366 gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
1367 {
1368   void *data = obstack_alloc (arch->obstack, size);
1369   memset (data, 0, size);
1370   return data;
1371 }
1372
1373
1374 /* Free a gdbarch struct.  This should never happen in normal
1375    operation --- once you've created a gdbarch, you keep it around.
1376    However, if an architecture's init function encounters an error
1377    building the structure, it may need to clean up a partially
1378    constructed gdbarch.  */
1379
1380 void
1381 gdbarch_free (struct gdbarch *arch)
1382 {
1383   struct obstack *obstack;
1384   gdb_assert (arch != NULL);
1385   gdb_assert (!arch->initialized_p);
1386   obstack = arch->obstack;
1387   obstack_free (obstack, 0); /* Includes the ARCH.  */
1388   xfree (obstack);
1389 }
1390 EOF
1391
1392 # verify a new architecture
1393 cat <<EOF
1394
1395
1396 /* Ensure that all values in a GDBARCH are reasonable.  */
1397
1398 static void
1399 verify_gdbarch (struct gdbarch *gdbarch)
1400 {
1401   struct ui_file *log;
1402   struct cleanup *cleanups;
1403   long dummy;
1404   char *buf;
1405   log = mem_fileopen ();
1406   cleanups = make_cleanup_ui_file_delete (log);
1407   /* fundamental */
1408   if (gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)
1409     fprintf_unfiltered (log, "\n\tbyte-order");
1410   if (gdbarch->bfd_arch_info == NULL)
1411     fprintf_unfiltered (log, "\n\tbfd_arch_info");
1412   /* Check those that need to be defined for the given multi-arch level. */
1413 EOF
1414 function_list | while do_read
1415 do
1416     if class_is_function_p || class_is_variable_p
1417     then
1418         if [ "x${invalid_p}" = "x0" ]
1419         then
1420             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1421         elif class_is_predicate_p
1422         then
1423             printf "  /* Skip verify of ${function}, has predicate */\n"
1424         # FIXME: See do_read for potential simplification
1425         elif [ -n "${invalid_p}" -a -n "${postdefault}" ]
1426         then
1427             printf "  if (${invalid_p})\n"
1428             printf "    gdbarch->${function} = ${postdefault};\n"
1429         elif [ -n "${predefault}" -a -n "${postdefault}" ]
1430         then
1431             printf "  if (gdbarch->${function} == ${predefault})\n"
1432             printf "    gdbarch->${function} = ${postdefault};\n"
1433         elif [ -n "${postdefault}" ]
1434         then
1435             printf "  if (gdbarch->${function} == 0)\n"
1436             printf "    gdbarch->${function} = ${postdefault};\n"
1437         elif [ -n "${invalid_p}" ]
1438         then
1439             printf "  if (${invalid_p})\n"
1440             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1441         elif [ -n "${predefault}" ]
1442         then
1443             printf "  if (gdbarch->${function} == ${predefault})\n"
1444             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1445         fi
1446     fi
1447 done
1448 cat <<EOF
1449   buf = ui_file_xstrdup (log, &dummy);
1450   make_cleanup (xfree, buf);
1451   if (strlen (buf) > 0)
1452     internal_error (__FILE__, __LINE__,
1453                     _("verify_gdbarch: the following are invalid ...%s"),
1454                     buf);
1455   do_cleanups (cleanups);
1456 }
1457 EOF
1458
1459 # dump the structure
1460 printf "\n"
1461 printf "\n"
1462 cat <<EOF
1463 /* Print out the details of the current architecture. */
1464
1465 void
1466 gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
1467 {
1468   const char *gdb_nm_file = "<not-defined>";
1469 #if defined (GDB_NM_FILE)
1470   gdb_nm_file = GDB_NM_FILE;
1471 #endif
1472   fprintf_unfiltered (file,
1473                       "gdbarch_dump: GDB_NM_FILE = %s\\n",
1474                       gdb_nm_file);
1475 EOF
1476 function_list | sort -t: -k 3 | while do_read
1477 do
1478     # First the predicate
1479     if class_is_predicate_p
1480     then
1481         printf "  fprintf_unfiltered (file,\n"
1482         printf "                      \"gdbarch_dump: gdbarch_${function}_p() = %%d\\\\n\",\n"
1483         printf "                      gdbarch_${function}_p (gdbarch));\n"
1484     fi
1485     # Print the corresponding value.
1486     if class_is_function_p
1487     then
1488         printf "  fprintf_unfiltered (file,\n"
1489         printf "                      \"gdbarch_dump: ${function} = <%%s>\\\\n\",\n"
1490         printf "                      host_address_to_string (gdbarch->${function}));\n"
1491     else
1492         # It is a variable
1493         case "${print}:${returntype}" in
1494             :CORE_ADDR )
1495                 fmt="%s"
1496                 print="core_addr_to_string_nz (gdbarch->${function})"
1497                 ;;
1498             :* )
1499                 fmt="%s"
1500                 print="plongest (gdbarch->${function})"
1501                 ;;
1502             * )
1503                 fmt="%s"
1504                 ;;
1505         esac
1506         printf "  fprintf_unfiltered (file,\n"
1507         printf "                      \"gdbarch_dump: ${function} = %s\\\\n\",\n" "${fmt}"
1508         printf "                      ${print});\n"
1509     fi
1510 done
1511 cat <<EOF
1512   if (gdbarch->dump_tdep != NULL)
1513     gdbarch->dump_tdep (gdbarch, file);
1514 }
1515 EOF
1516
1517
1518 # GET/SET
1519 printf "\n"
1520 cat <<EOF
1521 struct gdbarch_tdep *
1522 gdbarch_tdep (struct gdbarch *gdbarch)
1523 {
1524   if (gdbarch_debug >= 2)
1525     fprintf_unfiltered (gdb_stdlog, "gdbarch_tdep called\\n");
1526   return gdbarch->tdep;
1527 }
1528 EOF
1529 printf "\n"
1530 function_list | while do_read
1531 do
1532     if class_is_predicate_p
1533     then
1534         printf "\n"
1535         printf "int\n"
1536         printf "gdbarch_${function}_p (struct gdbarch *gdbarch)\n"
1537         printf "{\n"
1538         printf "  gdb_assert (gdbarch != NULL);\n"
1539         printf "  return ${predicate};\n"
1540         printf "}\n"
1541     fi
1542     if class_is_function_p
1543     then
1544         printf "\n"
1545         printf "${returntype}\n"
1546         if [ "x${formal}" = "xvoid" ]
1547         then
1548           printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1549         else
1550           printf "gdbarch_${function} (struct gdbarch *gdbarch, ${formal})\n"
1551         fi
1552         printf "{\n"
1553         printf "  gdb_assert (gdbarch != NULL);\n"
1554         printf "  gdb_assert (gdbarch->${function} != NULL);\n"
1555         if class_is_predicate_p && test -n "${predefault}"
1556         then
1557             # Allow a call to a function with a predicate.
1558             printf "  /* Do not check predicate: ${predicate}, allow call.  */\n"
1559         fi
1560         printf "  if (gdbarch_debug >= 2)\n"
1561         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1562         if [ "x${actual}" = "x-" -o "x${actual}" = "x" ]
1563         then
1564             if class_is_multiarch_p
1565             then
1566                 params="gdbarch"
1567             else
1568                 params=""
1569             fi
1570         else
1571             if class_is_multiarch_p
1572             then
1573                 params="gdbarch, ${actual}"
1574             else
1575                 params="${actual}"
1576             fi
1577         fi
1578         if [ "x${returntype}" = "xvoid" ]
1579         then
1580           printf "  gdbarch->${function} (${params});\n"
1581         else
1582           printf "  return gdbarch->${function} (${params});\n"
1583         fi
1584         printf "}\n"
1585         printf "\n"
1586         printf "void\n"
1587         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1588         printf "            `echo ${function} | sed -e 's/./ /g'`  gdbarch_${function}_ftype ${function})\n"
1589         printf "{\n"
1590         printf "  gdbarch->${function} = ${function};\n"
1591         printf "}\n"
1592     elif class_is_variable_p
1593     then
1594         printf "\n"
1595         printf "${returntype}\n"
1596         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1597         printf "{\n"
1598         printf "  gdb_assert (gdbarch != NULL);\n"
1599         if [ "x${invalid_p}" = "x0" ]
1600         then
1601             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1602         elif [ -n "${invalid_p}" ]
1603         then
1604             printf "  /* Check variable is valid.  */\n"
1605             printf "  gdb_assert (!(${invalid_p}));\n"
1606         elif [ -n "${predefault}" ]
1607         then
1608             printf "  /* Check variable changed from pre-default.  */\n"
1609             printf "  gdb_assert (gdbarch->${function} != ${predefault});\n"
1610         fi
1611         printf "  if (gdbarch_debug >= 2)\n"
1612         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1613         printf "  return gdbarch->${function};\n"
1614         printf "}\n"
1615         printf "\n"
1616         printf "void\n"
1617         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1618         printf "            `echo ${function} | sed -e 's/./ /g'`  ${returntype} ${function})\n"
1619         printf "{\n"
1620         printf "  gdbarch->${function} = ${function};\n"
1621         printf "}\n"
1622     elif class_is_info_p
1623     then
1624         printf "\n"
1625         printf "${returntype}\n"
1626         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1627         printf "{\n"
1628         printf "  gdb_assert (gdbarch != NULL);\n"
1629         printf "  if (gdbarch_debug >= 2)\n"
1630         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1631         printf "  return gdbarch->${function};\n"
1632         printf "}\n"
1633     fi
1634 done
1635
1636 # All the trailing guff
1637 cat <<EOF
1638
1639
1640 /* Keep a registry of per-architecture data-pointers required by GDB
1641    modules. */
1642
1643 struct gdbarch_data
1644 {
1645   unsigned index;
1646   int init_p;
1647   gdbarch_data_pre_init_ftype *pre_init;
1648   gdbarch_data_post_init_ftype *post_init;
1649 };
1650
1651 struct gdbarch_data_registration
1652 {
1653   struct gdbarch_data *data;
1654   struct gdbarch_data_registration *next;
1655 };
1656
1657 struct gdbarch_data_registry
1658 {
1659   unsigned nr;
1660   struct gdbarch_data_registration *registrations;
1661 };
1662
1663 struct gdbarch_data_registry gdbarch_data_registry =
1664 {
1665   0, NULL,
1666 };
1667
1668 static struct gdbarch_data *
1669 gdbarch_data_register (gdbarch_data_pre_init_ftype *pre_init,
1670                        gdbarch_data_post_init_ftype *post_init)
1671 {
1672   struct gdbarch_data_registration **curr;
1673   /* Append the new registraration.  */
1674   for (curr = &gdbarch_data_registry.registrations;
1675        (*curr) != NULL;
1676        curr = &(*curr)->next);
1677   (*curr) = XMALLOC (struct gdbarch_data_registration);
1678   (*curr)->next = NULL;
1679   (*curr)->data = XMALLOC (struct gdbarch_data);
1680   (*curr)->data->index = gdbarch_data_registry.nr++;
1681   (*curr)->data->pre_init = pre_init;
1682   (*curr)->data->post_init = post_init;
1683   (*curr)->data->init_p = 1;
1684   return (*curr)->data;
1685 }
1686
1687 struct gdbarch_data *
1688 gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *pre_init)
1689 {
1690   return gdbarch_data_register (pre_init, NULL);
1691 }
1692
1693 struct gdbarch_data *
1694 gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *post_init)
1695 {
1696   return gdbarch_data_register (NULL, post_init);
1697 }
1698
1699 /* Create/delete the gdbarch data vector. */
1700
1701 static void
1702 alloc_gdbarch_data (struct gdbarch *gdbarch)
1703 {
1704   gdb_assert (gdbarch->data == NULL);
1705   gdbarch->nr_data = gdbarch_data_registry.nr;
1706   gdbarch->data = GDBARCH_OBSTACK_CALLOC (gdbarch, gdbarch->nr_data, void *);
1707 }
1708
1709 /* Initialize the current value of the specified per-architecture
1710    data-pointer. */
1711
1712 void
1713 deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1714                              struct gdbarch_data *data,
1715                              void *pointer)
1716 {
1717   gdb_assert (data->index < gdbarch->nr_data);
1718   gdb_assert (gdbarch->data[data->index] == NULL);
1719   gdb_assert (data->pre_init == NULL);
1720   gdbarch->data[data->index] = pointer;
1721 }
1722
1723 /* Return the current value of the specified per-architecture
1724    data-pointer. */
1725
1726 void *
1727 gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *data)
1728 {
1729   gdb_assert (data->index < gdbarch->nr_data);
1730   if (gdbarch->data[data->index] == NULL)
1731     {
1732       /* The data-pointer isn't initialized, call init() to get a
1733          value.  */
1734       if (data->pre_init != NULL)
1735         /* Mid architecture creation: pass just the obstack, and not
1736            the entire architecture, as that way it isn't possible for
1737            pre-init code to refer to undefined architecture
1738            fields.  */
1739         gdbarch->data[data->index] = data->pre_init (gdbarch->obstack);
1740       else if (gdbarch->initialized_p
1741                && data->post_init != NULL)
1742         /* Post architecture creation: pass the entire architecture
1743            (as all fields are valid), but be careful to also detect
1744            recursive references.  */
1745         {
1746           gdb_assert (data->init_p);
1747           data->init_p = 0;
1748           gdbarch->data[data->index] = data->post_init (gdbarch);
1749           data->init_p = 1;
1750         }
1751       else
1752         /* The architecture initialization hasn't completed - punt -
1753          hope that the caller knows what they are doing.  Once
1754          deprecated_set_gdbarch_data has been initialized, this can be
1755          changed to an internal error.  */
1756         return NULL;
1757       gdb_assert (gdbarch->data[data->index] != NULL);
1758     }
1759   return gdbarch->data[data->index];
1760 }
1761
1762
1763 /* Keep a registry of the architectures known by GDB. */
1764
1765 struct gdbarch_registration
1766 {
1767   enum bfd_architecture bfd_architecture;
1768   gdbarch_init_ftype *init;
1769   gdbarch_dump_tdep_ftype *dump_tdep;
1770   struct gdbarch_list *arches;
1771   struct gdbarch_registration *next;
1772 };
1773
1774 static struct gdbarch_registration *gdbarch_registry = NULL;
1775
1776 static void
1777 append_name (const char ***buf, int *nr, const char *name)
1778 {
1779   *buf = xrealloc (*buf, sizeof (char**) * (*nr + 1));
1780   (*buf)[*nr] = name;
1781   *nr += 1;
1782 }
1783
1784 const char **
1785 gdbarch_printable_names (void)
1786 {
1787   /* Accumulate a list of names based on the registed list of
1788      architectures. */
1789   enum bfd_architecture a;
1790   int nr_arches = 0;
1791   const char **arches = NULL;
1792   struct gdbarch_registration *rego;
1793   for (rego = gdbarch_registry;
1794        rego != NULL;
1795        rego = rego->next)
1796     {
1797       const struct bfd_arch_info *ap;
1798       ap = bfd_lookup_arch (rego->bfd_architecture, 0);
1799       if (ap == NULL)
1800         internal_error (__FILE__, __LINE__,
1801                         _("gdbarch_architecture_names: multi-arch unknown"));
1802       do
1803         {
1804           append_name (&arches, &nr_arches, ap->printable_name);
1805           ap = ap->next;
1806         }
1807       while (ap != NULL);
1808     }
1809   append_name (&arches, &nr_arches, NULL);
1810   return arches;
1811 }
1812
1813
1814 void
1815 gdbarch_register (enum bfd_architecture bfd_architecture,
1816                   gdbarch_init_ftype *init,
1817                   gdbarch_dump_tdep_ftype *dump_tdep)
1818 {
1819   struct gdbarch_registration **curr;
1820   const struct bfd_arch_info *bfd_arch_info;
1821   /* Check that BFD recognizes this architecture */
1822   bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0);
1823   if (bfd_arch_info == NULL)
1824     {
1825       internal_error (__FILE__, __LINE__,
1826                       _("gdbarch: Attempt to register unknown architecture (%d)"),
1827                       bfd_architecture);
1828     }
1829   /* Check that we haven't seen this architecture before */
1830   for (curr = &gdbarch_registry;
1831        (*curr) != NULL;
1832        curr = &(*curr)->next)
1833     {
1834       if (bfd_architecture == (*curr)->bfd_architecture)
1835         internal_error (__FILE__, __LINE__,
1836                         _("gdbarch: Duplicate registraration of architecture (%s)"),
1837                         bfd_arch_info->printable_name);
1838     }
1839   /* log it */
1840   if (gdbarch_debug)
1841     fprintf_unfiltered (gdb_stdlog, "register_gdbarch_init (%s, %s)\n",
1842                         bfd_arch_info->printable_name,
1843                         host_address_to_string (init));
1844   /* Append it */
1845   (*curr) = XMALLOC (struct gdbarch_registration);
1846   (*curr)->bfd_architecture = bfd_architecture;
1847   (*curr)->init = init;
1848   (*curr)->dump_tdep = dump_tdep;
1849   (*curr)->arches = NULL;
1850   (*curr)->next = NULL;
1851 }
1852
1853 void
1854 register_gdbarch_init (enum bfd_architecture bfd_architecture,
1855                        gdbarch_init_ftype *init)
1856 {
1857   gdbarch_register (bfd_architecture, init, NULL);
1858 }
1859
1860
1861 /* Look for an architecture using gdbarch_info.  */
1862
1863 struct gdbarch_list *
1864 gdbarch_list_lookup_by_info (struct gdbarch_list *arches,
1865                              const struct gdbarch_info *info)
1866 {
1867   for (; arches != NULL; arches = arches->next)
1868     {
1869       if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info)
1870         continue;
1871       if (info->byte_order != arches->gdbarch->byte_order)
1872         continue;
1873       if (info->osabi != arches->gdbarch->osabi)
1874         continue;
1875       if (info->target_desc != arches->gdbarch->target_desc)
1876         continue;
1877       return arches;
1878     }
1879   return NULL;
1880 }
1881
1882
1883 /* Find an architecture that matches the specified INFO.  Create a new
1884    architecture if needed.  Return that new architecture.  Assumes
1885    that there is no current architecture.  */
1886
1887 static struct gdbarch *
1888 find_arch_by_info (struct gdbarch_info info)
1889 {
1890   struct gdbarch *new_gdbarch;
1891   struct gdbarch_registration *rego;
1892
1893   /* The existing architecture has been swapped out - all this code
1894      works from a clean slate.  */
1895   gdb_assert (current_gdbarch == NULL);
1896
1897   /* Fill in missing parts of the INFO struct using a number of
1898      sources: "set ..."; INFOabfd supplied; and the global
1899      defaults.  */
1900   gdbarch_info_fill (&info);
1901
1902   /* Must have found some sort of architecture. */
1903   gdb_assert (info.bfd_arch_info != NULL);
1904
1905   if (gdbarch_debug)
1906     {
1907       fprintf_unfiltered (gdb_stdlog,
1908                           "find_arch_by_info: info.bfd_arch_info %s\n",
1909                           (info.bfd_arch_info != NULL
1910                            ? info.bfd_arch_info->printable_name
1911                            : "(null)"));
1912       fprintf_unfiltered (gdb_stdlog,
1913                           "find_arch_by_info: info.byte_order %d (%s)\n",
1914                           info.byte_order,
1915                           (info.byte_order == BFD_ENDIAN_BIG ? "big"
1916                            : info.byte_order == BFD_ENDIAN_LITTLE ? "little"
1917                            : "default"));
1918       fprintf_unfiltered (gdb_stdlog,
1919                           "find_arch_by_info: info.osabi %d (%s)\n",
1920                           info.osabi, gdbarch_osabi_name (info.osabi));
1921       fprintf_unfiltered (gdb_stdlog,
1922                           "find_arch_by_info: info.abfd %s\n",
1923                           host_address_to_string (info.abfd));
1924       fprintf_unfiltered (gdb_stdlog,
1925                           "find_arch_by_info: info.tdep_info %s\n",
1926                           host_address_to_string (info.tdep_info));
1927     }
1928
1929   /* Find the tdep code that knows about this architecture.  */
1930   for (rego = gdbarch_registry;
1931        rego != NULL;
1932        rego = rego->next)
1933     if (rego->bfd_architecture == info.bfd_arch_info->arch)
1934       break;
1935   if (rego == NULL)
1936     {
1937       if (gdbarch_debug)
1938         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
1939                             "No matching architecture\n");
1940       return 0;
1941     }
1942
1943   /* Ask the tdep code for an architecture that matches "info".  */
1944   new_gdbarch = rego->init (info, rego->arches);
1945
1946   /* Did the tdep code like it?  No.  Reject the change and revert to
1947      the old architecture.  */
1948   if (new_gdbarch == NULL)
1949     {
1950       if (gdbarch_debug)
1951         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
1952                             "Target rejected architecture\n");
1953       return NULL;
1954     }
1955
1956   /* Is this a pre-existing architecture (as determined by already
1957      being initialized)?  Move it to the front of the architecture
1958      list (keeping the list sorted Most Recently Used).  */
1959   if (new_gdbarch->initialized_p)
1960     {
1961       struct gdbarch_list **list;
1962       struct gdbarch_list *this;
1963       if (gdbarch_debug)
1964         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
1965                             "Previous architecture %s (%s) selected\n",
1966                             host_address_to_string (new_gdbarch),
1967                             new_gdbarch->bfd_arch_info->printable_name);
1968       /* Find the existing arch in the list.  */
1969       for (list = &rego->arches;
1970            (*list) != NULL && (*list)->gdbarch != new_gdbarch;
1971            list = &(*list)->next);
1972       /* It had better be in the list of architectures.  */
1973       gdb_assert ((*list) != NULL && (*list)->gdbarch == new_gdbarch);
1974       /* Unlink THIS.  */
1975       this = (*list);
1976       (*list) = this->next;
1977       /* Insert THIS at the front.  */
1978       this->next = rego->arches;
1979       rego->arches = this;
1980       /* Return it.  */
1981       return new_gdbarch;
1982     }
1983
1984   /* It's a new architecture.  */
1985   if (gdbarch_debug)
1986     fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
1987                         "New architecture %s (%s) selected\n",
1988                         host_address_to_string (new_gdbarch),
1989                         new_gdbarch->bfd_arch_info->printable_name);
1990
1991   /* Insert the new architecture into the front of the architecture
1992      list (keep the list sorted Most Recently Used).  */
1993   {
1994     struct gdbarch_list *this = XMALLOC (struct gdbarch_list);
1995     this->next = rego->arches;
1996     this->gdbarch = new_gdbarch;
1997     rego->arches = this;
1998   }
1999
2000   /* Check that the newly installed architecture is valid.  Plug in
2001      any post init values.  */
2002   new_gdbarch->dump_tdep = rego->dump_tdep;
2003   verify_gdbarch (new_gdbarch);
2004   new_gdbarch->initialized_p = 1;
2005
2006   if (gdbarch_debug)
2007     gdbarch_dump (new_gdbarch, gdb_stdlog);
2008
2009   return new_gdbarch;
2010 }
2011
2012 struct gdbarch *
2013 gdbarch_find_by_info (struct gdbarch_info info)
2014 {
2015   struct gdbarch *new_gdbarch;
2016
2017   /* Save the previously selected architecture, setting the global to
2018      NULL.  This stops things like gdbarch->init() trying to use the
2019      previous architecture's configuration.  The previous architecture
2020      may not even be of the same architecture family.  The most recent
2021      architecture of the same family is found at the head of the
2022      rego->arches list.  */
2023   struct gdbarch *old_gdbarch = current_gdbarch;
2024   current_gdbarch = NULL;
2025
2026   /* Find the specified architecture.  */
2027   new_gdbarch = find_arch_by_info (info);
2028
2029   /* Restore the existing architecture.  */
2030   gdb_assert (current_gdbarch == NULL);
2031   current_gdbarch = old_gdbarch;
2032
2033   return new_gdbarch;
2034 }
2035
2036 /* Make the specified architecture current.  */
2037
2038 void
2039 deprecated_current_gdbarch_select_hack (struct gdbarch *new_gdbarch)
2040 {
2041   gdb_assert (new_gdbarch != NULL);
2042   gdb_assert (current_gdbarch != NULL);
2043   gdb_assert (new_gdbarch->initialized_p);
2044   current_gdbarch = new_gdbarch;
2045   target_gdbarch = new_gdbarch;
2046   observer_notify_architecture_changed (new_gdbarch);
2047   registers_changed ();
2048 }
2049
2050 extern void _initialize_gdbarch (void);
2051
2052 void
2053 _initialize_gdbarch (void)
2054 {
2055   struct cmd_list_element *c;
2056
2057   add_setshow_zinteger_cmd ("arch", class_maintenance, &gdbarch_debug, _("\\
2058 Set architecture debugging."), _("\\
2059 Show architecture debugging."), _("\\
2060 When non-zero, architecture debugging is enabled."),
2061                             NULL,
2062                             show_gdbarch_debug,
2063                             &setdebuglist, &showdebuglist);
2064 }
2065 EOF
2066
2067 # close things off
2068 exec 1>&2
2069 #../move-if-change new-gdbarch.c gdbarch.c
2070 compare_new gdbarch.c