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