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, 2010 Free Software Foundation, Inc.
   7 #
   8 # This file is part of GDB.
   9 #
  10 # This program is free software; you can redistribute it and/or modify
  11 # it under the terms of the GNU General Public License as published by
  12 # the Free Software Foundation; either version 3 of the License, or
  13 # (at your option) any later version.
  14 #
  15 # This program is distributed in the hope that it will be useful,
  16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 # GNU General Public License for more details.
  19 #
  20 # You should have received a copy of the GNU General Public License
  21 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 # Make certain that the script is not running in an internationalized
  24 # environment.
  25 LANG=c ; export LANG
  26 LC_ALL=c ; export LC_ALL
  27
  28
  29 compare_new ()
  30 {
  31     file=$1
  32     if test ! -r ${file}
  33     then
  34         echo "${file} missing? cp new-${file} ${file}" 1>&2
  35     elif diff -u ${file} new-${file}
  36     then
  37         echo "${file} unchanged" 1>&2
  38     else
  39         echo "${file} has changed? cp new-${file} ${file}" 1>&2
  40     fi
  41 }
  42
  43
  44 # Format of the input table
  45 read="class returntype function formal actual staticdefault predefault postdefault invalid_p print garbage_at_eol"
  46
  47 do_read ()
  48 {
  49     comment=""
  50     class=""
  51     while read line
  52     do
  53         if test "${line}" = ""
  54         then
  55             continue
  56         elif test "${line}" = "#" -a "${comment}" = ""
  57         then
  58             continue
  59         elif expr "${line}" : "#" > /dev/null
  60         then
  61             comment="${comment}
  62 ${line}"
  63         else
  64
  65             # The semantics of IFS varies between different SH's.  Some
  66             # treat ``::' as three fields while some treat it as just too.
  67             # Work around this by eliminating ``::'' ....
  68             line="`echo "${line}" | sed -e 's/::/: :/g' -e 's/::/: :/g'`"
  69
  70             OFS="${IFS}" ; IFS="[:]"
  71             eval read ${read} <<EOF
  72 ${line}
  73 EOF
  74             IFS="${OFS}"
  75
  76             if test -n "${garbage_at_eol}"
  77             then
  78                 echo "Garbage at end-of-line in ${line}" 1>&2
  79                 kill $$
  80                 exit 1
  81             fi
  82
  83             # .... and then going back through each field and strip out those
  84             # that ended up with just that space character.
  85             for r in ${read}
  86             do
  87                 if eval test \"\${${r}}\" = \"\ \"
  88                 then
  89                     eval ${r}=""
  90                 fi
  91             done
  92
  93             case "${class}" in
  94                 m ) staticdefault="${predefault}" ;;
  95                 M ) staticdefault="0" ;;
  96                 * ) test "${staticdefault}" || staticdefault=0 ;;
  97             esac
  98
  99             case "${class}" in
 100             F | V | M )
 101                 case "${invalid_p}" in
 102                 "" )
 103                     if test -n "${predefault}"
 104                     then
 105                         #invalid_p="gdbarch->${function} == ${predefault}"
 106                         predicate="gdbarch->${function} != ${predefault}"
 107                     elif class_is_variable_p
 108                     then
 109                         predicate="gdbarch->${function} != 0"
 110                     elif class_is_function_p
 111                     then
 112                         predicate="gdbarch->${function} != NULL"
 113                     fi
 114                     ;;
 115                 * )
 116                     echo "Predicate function ${function} with invalid_p." 1>&2
 117                     kill $$
 118                     exit 1
 119                     ;;
 120                 esac
 121             esac
 122
 123             # PREDEFAULT is a valid fallback definition of MEMBER when
 124             # multi-arch is not enabled.  This ensures that the
 125             # default value, when multi-arch is the same as the
 126             # default value when not multi-arch.  POSTDEFAULT is
 127             # always a valid definition of MEMBER as this again
 128             # ensures consistency.
 129
 130             if [ -n "${postdefault}" ]
 131             then
 132                 fallbackdefault="${postdefault}"
 133             elif [ -n "${predefault}" ]
 134             then
 135                 fallbackdefault="${predefault}"
 136             else
 137                 fallbackdefault="0"
 138             fi
 139
 140             #NOT YET: See gdbarch.log for basic verification of
 141             # database
 142
 143             break
 144         fi
 145     done
 146     if [ -n "${class}" ]
 147     then
 148         true
 149     else
 150         false
 151     fi
 152 }
 153
 154
 155 fallback_default_p ()
 156 {
 157     [ -n "${postdefault}" -a "x${invalid_p}" != "x0" ] \
 158         || [ -n "${predefault}" -a "x${invalid_p}" = "x0" ]
 159 }
 160
 161 class_is_variable_p ()
 162 {
 163     case "${class}" in
 164         *v* | *V* ) true ;;
 165         * ) false ;;
 166     esac
 167 }
 168
 169 class_is_function_p ()
 170 {
 171     case "${class}" in
 172         *f* | *F* | *m* | *M* ) true ;;
 173         * ) false ;;
 174     esac
 175 }
 176
 177 class_is_multiarch_p ()
 178 {
 179     case "${class}" in
 180         *m* | *M* ) true ;;
 181         * ) false ;;
 182     esac
 183 }
 184
 185 class_is_predicate_p ()
 186 {
 187     case "${class}" in
 188         *F* | *V* | *M* ) true ;;
 189         * ) false ;;
 190     esac
 191 }
 192
 193 class_is_info_p ()
 194 {
 195     case "${class}" in
 196         *i* ) true ;;
 197         * ) false ;;
 198     esac
 199 }
 200
 201
 202 # dump out/verify the doco
 203 for field in ${read}
 204 do
 205   case ${field} in
 206
 207     class ) : ;;
 208
 209         # # -> line disable
 210         # f -> function
 211         #   hiding a function
 212         # F -> function + predicate
 213         #   hiding a function + predicate to test function validity
 214         # v -> variable
 215         #   hiding a variable
 216         # V -> variable + predicate
 217         #   hiding a variable + predicate to test variables validity
 218         # i -> set from info
 219         #   hiding something from the ``struct info'' object
 220         # m -> multi-arch function
 221         #   hiding a multi-arch function (parameterised with the architecture)
 222         # M -> multi-arch function + predicate
 223         #   hiding a multi-arch function + predicate to test function validity
 224
 225     returntype ) : ;;
 226
 227         # For functions, the return type; for variables, the data type
 228
 229     function ) : ;;
 230
 231         # For functions, the member function name; for variables, the
 232         # variable name.  Member function names are always prefixed with
 233         # ``gdbarch_'' for name-space purity.
 234
 235     formal ) : ;;
 236
 237         # The formal argument list.  It is assumed that the formal
 238         # argument list includes the actual name of each list element.
 239         # A function with no arguments shall have ``void'' as the
 240         # formal argument list.
 241
 242     actual ) : ;;
 243
 244         # The list of actual arguments.  The arguments specified shall
 245         # match the FORMAL list given above.  Functions with out
 246         # arguments leave this blank.
 247
 248     staticdefault ) : ;;
 249
 250         # To help with the GDB startup a static gdbarch object is
 251         # created.  STATICDEFAULT is the value to insert into that
 252         # static gdbarch object.  Since this a static object only
 253         # simple expressions can be used.
 254
 255         # If STATICDEFAULT is empty, zero is used.
 256
 257     predefault ) : ;;
 258
 259         # An initial value to assign to MEMBER of the freshly
 260         # malloc()ed gdbarch object.  After initialization, the
 261         # freshly malloc()ed object is passed to the target
 262         # architecture code for further updates.
 263
 264         # If PREDEFAULT is empty, zero is used.
 265
 266         # A non-empty PREDEFAULT, an empty POSTDEFAULT and a zero
 267         # INVALID_P are specified, PREDEFAULT will be used as the
 268         # default for the non- multi-arch target.
 269
 270         # A zero PREDEFAULT function will force the fallback to call
 271         # internal_error().
 272
 273         # Variable declarations can refer to ``gdbarch'' which will
 274         # contain the current architecture.  Care should be taken.
 275
 276     postdefault ) : ;;
 277
 278         # A value to assign to MEMBER of the new gdbarch object should
 279         # the target architecture code fail to change the PREDEFAULT
 280         # value.
 281
 282         # If POSTDEFAULT is empty, no post update is performed.
 283
 284         # If both INVALID_P and POSTDEFAULT are non-empty then
 285         # INVALID_P will be used to determine if MEMBER should be
 286         # changed to POSTDEFAULT.
 287
 288         # If a non-empty POSTDEFAULT and a zero INVALID_P are
 289         # specified, POSTDEFAULT will be used as the default for the
 290         # non- multi-arch target (regardless of the value of
 291         # PREDEFAULT).
 292
 293         # You cannot specify both a zero INVALID_P and a POSTDEFAULT.
 294
 295         # Variable declarations can refer to ``gdbarch'' which
 296         # will contain the current architecture.  Care should be
 297         # taken.
 298
 299     invalid_p ) : ;;
 300
 301         # A predicate equation that validates MEMBER.  Non-zero is
 302         # returned if the code creating the new architecture failed to
 303         # initialize MEMBER or the initialized the member is invalid.
 304         # If POSTDEFAULT is non-empty then MEMBER will be updated to
 305         # that value.  If POSTDEFAULT is empty then internal_error()
 306         # is called.
 307
 308         # If INVALID_P is empty, a check that MEMBER is no longer
 309         # equal to PREDEFAULT is used.
 310
 311         # The expression ``0'' disables the INVALID_P check making
 312         # PREDEFAULT a legitimate value.
 313
 314         # See also PREDEFAULT and POSTDEFAULT.
 315
 316     print ) : ;;
 317
 318         # An optional expression that convers MEMBER to a value
 319         # suitable for formatting using %s.
 320
 321         # If PRINT is empty, core_addr_to_string_nz (for CORE_ADDR)
 322         # or plongest (anything else) is used.
 323
 324     garbage_at_eol ) : ;;
 325
 326         # Catches stray fields.
 327
 328     *)
 329         echo "Bad field ${field}"
 330         exit 1;;
 331   esac
 332 done
 333
 334
 335 function_list ()
 336 {
 337   # See below (DOCO) for description of each field
 338   cat <<EOF
 339 i:const struct bfd_arch_info *:bfd_arch_info:::&bfd_default_arch_struct::::gdbarch_bfd_arch_info (gdbarch)->printable_name
 340 #
 341 i:int:byte_order:::BFD_ENDIAN_BIG
 342 i:int:byte_order_for_code:::BFD_ENDIAN_BIG
 343 #
 344 i:enum gdb_osabi:osabi:::GDB_OSABI_UNKNOWN
 345 #
 346 i:const struct target_desc *:target_desc:::::::host_address_to_string (gdbarch->target_desc)
 347
 348 # The bit byte-order has to do just with numbering of bits in debugging symbols
 349 # and such.  Conceptually, it's quite separate from byte/word byte order.
 350 v:int:bits_big_endian:::1:(gdbarch->byte_order == BFD_ENDIAN_BIG)::0
 351
 352 # Number of bits in a char or unsigned char for the target machine.
 353 # Just like CHAR_BIT in <limits.h> but describes the target machine.
 354 # v:TARGET_CHAR_BIT:int:char_bit::::8 * sizeof (char):8::0:
 355 #
 356 # Number of bits in a short or unsigned short for the target machine.
 357 v:int:short_bit:::8 * sizeof (short):2*TARGET_CHAR_BIT::0
 358 # Number of bits in an int or unsigned int for the target machine.
 359 v:int:int_bit:::8 * sizeof (int):4*TARGET_CHAR_BIT::0
 360 # Number of bits in a long or unsigned long for the target machine.
 361 v:int:long_bit:::8 * sizeof (long):4*TARGET_CHAR_BIT::0
 362 # Number of bits in a long long or unsigned long long for the target
 363 # machine.
 364 v:int:long_long_bit:::8 * sizeof (LONGEST):2*gdbarch->long_bit::0
 365
 366 # The ABI default bit-size and format for "float", "double", and "long
 367 # double".  These bit/format pairs should eventually be combined into
 368 # a single object.  For the moment, just initialize them as a pair.
 369 # Each format describes both the big and little endian layouts (if
 370 # useful).
 371
 372 v:int:float_bit:::8 * sizeof (float):4*TARGET_CHAR_BIT::0
 373 v:const struct floatformat **:float_format:::::floatformats_ieee_single::pformat (gdbarch->float_format)
 374 v:int:double_bit:::8 * sizeof (double):8*TARGET_CHAR_BIT::0
 375 v:const struct floatformat **:double_format:::::floatformats_ieee_double::pformat (gdbarch->double_format)
 376 v:int:long_double_bit:::8 * sizeof (long double):8*TARGET_CHAR_BIT::0
 377 v:const struct floatformat **:long_double_format:::::floatformats_ieee_double::pformat (gdbarch->long_double_format)
 378
 379 # For most targets, a pointer on the target and its representation as an
 380 # address in GDB have the same size and "look the same".  For such a
 381 # target, you need only set gdbarch_ptr_bit and gdbarch_addr_bit
 382 # / addr_bit will be set from it.
 383 #
 384 # If gdbarch_ptr_bit and gdbarch_addr_bit are different, you'll probably
 385 # also need to set gdbarch_pointer_to_address and gdbarch_address_to_pointer
 386 # as well.
 387 #
 388 # ptr_bit is the size of a pointer on the target
 389 v:int:ptr_bit:::8 * sizeof (void*):gdbarch->int_bit::0
 390 # addr_bit is the size of a target address as represented in gdb
 391 v:int:addr_bit:::8 * sizeof (void*):0:gdbarch_ptr_bit (gdbarch):
 392 #
 393 # One if \`char' acts like \`signed char', zero if \`unsigned char'.
 394 v:int:char_signed:::1:-1:1
 395 #
 396 F:CORE_ADDR:read_pc:struct regcache *regcache:regcache
 397 F:void:write_pc:struct regcache *regcache, CORE_ADDR val:regcache, val
 398 # Function for getting target's idea of a frame pointer.  FIXME: GDB's
 399 # whole scheme for dealing with "frames" and "frame pointers" needs a
 400 # serious shakedown.
 401 m:void:virtual_frame_pointer:CORE_ADDR pc, int *frame_regnum, LONGEST *frame_offset:pc, frame_regnum, frame_offset:0:legacy_virtual_frame_pointer::0
 402 #
 403 M:void:pseudo_register_read:struct regcache *regcache, int cookednum, gdb_byte *buf:regcache, cookednum, buf
 404 M:void:pseudo_register_write:struct regcache *regcache, int cookednum, const gdb_byte *buf:regcache, cookednum, buf
 405 #
 406 v:int:num_regs:::0:-1
 407 # This macro gives the number of pseudo-registers that live in the
 408 # register namespace but do not get fetched or stored on the target.
 409 # These pseudo-registers may be aliases for other registers,
 410 # combinations of other registers, or they may be computed by GDB.
 411 v:int:num_pseudo_regs:::0:0::0
 412
 413 # GDB's standard (or well known) register numbers.  These can map onto
 414 # a real register or a pseudo (computed) register or not be defined at
 415 # all (-1).
 416 # gdbarch_sp_regnum will hopefully be replaced by UNWIND_SP.
 417 v:int:sp_regnum:::-1:-1::0
 418 v:int:pc_regnum:::-1:-1::0
 419 v:int:ps_regnum:::-1:-1::0
 420 v:int:fp0_regnum:::0:-1::0
 421 # Convert stab register number (from \`r\' declaration) to a gdb REGNUM.
 422 m:int:stab_reg_to_regnum:int stab_regnr:stab_regnr::no_op_reg_to_regnum::0
 423 # Provide a default mapping from a ecoff register number to a gdb REGNUM.
 424 m:int:ecoff_reg_to_regnum:int ecoff_regnr:ecoff_regnr::no_op_reg_to_regnum::0
 425 # Convert from an sdb register number to an internal gdb register number.
 426 m:int:sdb_reg_to_regnum:int sdb_regnr:sdb_regnr::no_op_reg_to_regnum::0
 427 # Provide a default mapping from a DWARF2 register number to a gdb REGNUM.
 428 m:int:dwarf2_reg_to_regnum:int dwarf2_regnr:dwarf2_regnr::no_op_reg_to_regnum::0
 429 m:const char *:register_name:int regnr:regnr::0
 430
 431 # Return the type of a register specified by the architecture.  Only
 432 # the register cache should call this function directly; others should
 433 # use "register_type".
 434 M:struct type *:register_type:int reg_nr:reg_nr
 435
 436 # See gdbint.texinfo, and PUSH_DUMMY_CALL.
 437 M:struct frame_id:dummy_id:struct frame_info *this_frame:this_frame
 438 # Implement DUMMY_ID and PUSH_DUMMY_CALL, then delete
 439 # deprecated_fp_regnum.
 440 v:int:deprecated_fp_regnum:::-1:-1::0
 441
 442 # See gdbint.texinfo.  See infcall.c.
 443 M:CORE_ADDR:push_dummy_call:struct value *function, struct regcache *regcache, CORE_ADDR bp_addr, int nargs, struct value **args, CORE_ADDR sp, int struct_return, CORE_ADDR struct_addr:function, regcache, bp_addr, nargs, args, sp, struct_return, struct_addr
 444 v:int:call_dummy_location::::AT_ENTRY_POINT::0
 445 M:CORE_ADDR:push_dummy_code:CORE_ADDR sp, CORE_ADDR funaddr, struct value **args, int nargs, struct type *value_type, CORE_ADDR *real_pc, CORE_ADDR *bp_addr, struct regcache *regcache:sp, funaddr, args, nargs, value_type, real_pc, bp_addr, regcache
 446
 447 m:void:print_registers_info:struct ui_file *file, struct frame_info *frame, int regnum, int all:file, frame, regnum, all::default_print_registers_info::0
 448 M:void:print_float_info:struct ui_file *file, struct frame_info *frame, const char *args:file, frame, args
 449 M:void:print_vector_info:struct ui_file *file, struct frame_info *frame, const char *args:file, frame, args
 450 # MAP a GDB RAW register number onto a simulator register number.  See
 451 # also include/...-sim.h.
 452 m:int:register_sim_regno:int reg_nr:reg_nr::legacy_register_sim_regno::0
 453 m:int:cannot_fetch_register:int regnum:regnum::cannot_register_not::0
 454 m:int:cannot_store_register:int regnum:regnum::cannot_register_not::0
 455 # setjmp/longjmp support.
 456 F:int:get_longjmp_target:struct frame_info *frame, CORE_ADDR *pc:frame, pc
 457 #
 458 v:int:believe_pcc_promotion:::::::
 459 #
 460 m:int:convert_register_p:int regnum, struct type *type:regnum, type:0:generic_convert_register_p::0
 461 f:void:register_to_value:struct frame_info *frame, int regnum, struct type *type, gdb_byte *buf:frame, regnum, type, buf:0
 462 f:void:value_to_register:struct frame_info *frame, int regnum, struct type *type, const gdb_byte *buf:frame, regnum, type, buf:0
 463 # Construct a value representing the contents of register REGNUM in
 464 # frame FRAME, interpreted as type TYPE.  The routine needs to
 465 # allocate and return a struct value with all value attributes
 466 # (but not the value contents) filled in.
 467 f:struct value *:value_from_register:struct type *type, int regnum, struct frame_info *frame:type, regnum, frame::default_value_from_register::0
 468 #
 469 m:CORE_ADDR:pointer_to_address:struct type *type, const gdb_byte *buf:type, buf::unsigned_pointer_to_address::0
 470 m:void:address_to_pointer:struct type *type, gdb_byte *buf, CORE_ADDR addr:type, buf, addr::unsigned_address_to_pointer::0
 471 M:CORE_ADDR:integer_to_address:struct type *type, const gdb_byte *buf:type, buf
 472
 473 # Return the return-value convention that will be used by FUNCTYPE
 474 # to return a value of type VALTYPE.  FUNCTYPE may be NULL in which
 475 # case the return convention is computed based only on VALTYPE.
 476 #
 477 # If READBUF is not NULL, extract the return value and save it in this buffer.
 478 #
 479 # If WRITEBUF is not NULL, it contains a return value which will be
 480 # stored into the appropriate register.  This can be used when we want
 481 # to force the value returned by a function (see the "return" command
 482 # for instance).
 483 M:enum return_value_convention:return_value:struct type *functype, struct type *valtype, struct regcache *regcache, gdb_byte *readbuf, const gdb_byte *writebuf:functype, valtype, regcache, readbuf, writebuf
 484
 485 m:CORE_ADDR:skip_prologue:CORE_ADDR ip:ip:0:0
 486 M:CORE_ADDR:skip_main_prologue:CORE_ADDR ip:ip
 487 f:int:inner_than:CORE_ADDR lhs, CORE_ADDR rhs:lhs, rhs:0:0
 488 m:const gdb_byte *:breakpoint_from_pc:CORE_ADDR *pcptr, int *lenptr:pcptr, lenptr::0:
 489 M:CORE_ADDR:adjust_breakpoint_address:CORE_ADDR bpaddr:bpaddr
 490 m:int:memory_insert_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_insert_breakpoint::0
 491 m:int:memory_remove_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_remove_breakpoint::0
 492 v:CORE_ADDR:decr_pc_after_break:::0:::0
 493
 494 # A function can be addressed by either it's "pointer" (possibly a
 495 # descriptor address) or "entry point" (first executable instruction).
 496 # The method "convert_from_func_ptr_addr" converting the former to the
 497 # latter.  gdbarch_deprecated_function_start_offset is being used to implement
 498 # a simplified subset of that functionality - the function's address
 499 # corresponds to the "function pointer" and the function's start
 500 # corresponds to the "function entry point" - and hence is redundant.
 501
 502 v:CORE_ADDR:deprecated_function_start_offset:::0:::0
 503
 504 # Return the remote protocol register number associated with this
 505 # register.  Normally the identity mapping.
 506 m:int:remote_register_number:int regno:regno::default_remote_register_number::0
 507
 508 # Fetch the target specific address used to represent a load module.
 509 F:CORE_ADDR:fetch_tls_load_module_address:struct objfile *objfile:objfile
 510 #
 511 v:CORE_ADDR:frame_args_skip:::0:::0
 512 M:CORE_ADDR:unwind_pc:struct frame_info *next_frame:next_frame
 513 M:CORE_ADDR:unwind_sp:struct frame_info *next_frame:next_frame
 514 # DEPRECATED_FRAME_LOCALS_ADDRESS as been replaced by the per-frame
 515 # frame-base.  Enable frame-base before frame-unwind.
 516 F:int:frame_num_args:struct frame_info *frame:frame
 517 #
 518 M:CORE_ADDR:frame_align:CORE_ADDR address:address
 519 m:int:stabs_argument_has_addr:struct type *type:type::default_stabs_argument_has_addr::0
 520 v:int:frame_red_zone_size
 521 #
 522 m:CORE_ADDR:convert_from_func_ptr_addr:CORE_ADDR addr, struct target_ops *targ:addr, targ::convert_from_func_ptr_addr_identity::0
 523 # On some machines there are bits in addresses which are not really
 524 # part of the address, but are used by the kernel, the hardware, etc.
 525 # for special purposes.  gdbarch_addr_bits_remove takes out any such bits so
 526 # we get a "real" address such as one would find in a symbol table.
 527 # This is used only for addresses of instructions, and even then I'm
 528 # not sure it's used in all contexts.  It exists to deal with there
 529 # being a few stray bits in the PC which would mislead us, not as some
 530 # sort of generic thing to handle alignment or segmentation (it's
 531 # possible it should be in TARGET_READ_PC instead).
 532 m:CORE_ADDR:addr_bits_remove:CORE_ADDR addr:addr::core_addr_identity::0
 533 # It is not at all clear why gdbarch_smash_text_address is not folded into
 534 # gdbarch_addr_bits_remove.
 535 m:CORE_ADDR:smash_text_address:CORE_ADDR addr:addr::core_addr_identity::0
 536
 537 # FIXME/cagney/2001-01-18: This should be split in two.  A target method that
 538 # indicates if the target needs software single step.  An ISA method to
 539 # implement it.
 540 #
 541 # FIXME/cagney/2001-01-18: This should be replaced with something that inserts
 542 # breakpoints using the breakpoint system instead of blatting memory directly
 543 # (as with rs6000).
 544 #
 545 # FIXME/cagney/2001-01-18: The logic is backwards.  It should be asking if the
 546 # target can single step.  If not, then implement single step using breakpoints.
 547 #
 548 # A return value of 1 means that the software_single_step breakpoints
 549 # were inserted; 0 means they were not.
 550 F:int:software_single_step:struct frame_info *frame:frame
 551
 552 # Return non-zero if the processor is executing a delay slot and a
 553 # further single-step is needed before the instruction finishes.
 554 M:int:single_step_through_delay:struct frame_info *frame:frame
 555 # FIXME: cagney/2003-08-28: Need to find a better way of selecting the
 556 # disassembler.  Perhaps objdump can handle it?
 557 f:int:print_insn:bfd_vma vma, struct disassemble_info *info:vma, info::0:
 558 f:CORE_ADDR:skip_trampoline_code:struct frame_info *frame, CORE_ADDR pc:frame, pc::generic_skip_trampoline_code::0
 559
 560
 561 # If in_solib_dynsym_resolve_code() returns true, and SKIP_SOLIB_RESOLVER
 562 # evaluates non-zero, this is the address where the debugger will place
 563 # a step-resume breakpoint to get us past the dynamic linker.
 564 m:CORE_ADDR:skip_solib_resolver:CORE_ADDR pc:pc::generic_skip_solib_resolver::0
 565 # Some systems also have trampoline code for returning from shared libs.
 566 m:int:in_solib_return_trampoline:CORE_ADDR pc, char *name:pc, name::generic_in_solib_return_trampoline::0
 567
 568 # A target might have problems with watchpoints as soon as the stack
 569 # frame of the current function has been destroyed.  This mostly happens
 570 # as the first action in a funtion's epilogue.  in_function_epilogue_p()
 571 # is defined to return a non-zero value if either the given addr is one
 572 # instruction after the stack destroying instruction up to the trailing
 573 # return instruction or if we can figure out that the stack frame has
 574 # already been invalidated regardless of the value of addr.  Targets
 575 # which don't suffer from that problem could just let this functionality
 576 # untouched.
 577 m:int:in_function_epilogue_p:CORE_ADDR addr:addr:0:generic_in_function_epilogue_p::0
 578 f:void:elf_make_msymbol_special:asymbol *sym, struct minimal_symbol *msym:sym, msym::default_elf_make_msymbol_special::0
 579 f:void:coff_make_msymbol_special:int val, struct minimal_symbol *msym:val, msym::default_coff_make_msymbol_special::0
 580 v:int:cannot_step_breakpoint:::0:0::0
 581 v:int:have_nonsteppable_watchpoint:::0:0::0
 582 F:int:address_class_type_flags:int byte_size, int dwarf2_addr_class:byte_size, dwarf2_addr_class
 583 M:const char *:address_class_type_flags_to_name:int type_flags:type_flags
 584 M:int:address_class_name_to_type_flags:const char *name, int *type_flags_ptr:name, type_flags_ptr
 585 # Is a register in a group
 586 m:int:register_reggroup_p:int regnum, struct reggroup *reggroup:regnum, reggroup::default_register_reggroup_p::0
 587 # Fetch the pointer to the ith function argument.
 588 F:CORE_ADDR:fetch_pointer_argument:struct frame_info *frame, int argi, struct type *type:frame, argi, type
 589
 590 # Return the appropriate register set for a core file section with
 591 # name SECT_NAME and size SECT_SIZE.
 592 M:const struct regset *:regset_from_core_section:const char *sect_name, size_t sect_size:sect_name, sect_size
 593
 594 # When creating core dumps, some systems encode the PID in addition
 595 # to the LWP id in core file register section names.  In those cases, the
 596 # "XXX" in ".reg/XXX" is encoded as [LWPID << 16 | PID].  This setting
 597 # is set to true for such architectures; false if "XXX" represents an LWP
 598 # or thread id with no special encoding.
 599 v:int:core_reg_section_encodes_pid:::0:0::0
 600
 601 # Supported register notes in a core file.
 602 v:struct core_regset_section *:core_regset_sections:const char *name, int len::::::host_address_to_string (gdbarch->core_regset_sections)
 603
 604 # Read offset OFFSET of TARGET_OBJECT_LIBRARIES formatted shared libraries list from
 605 # core file into buffer READBUF with length LEN.
 606 M:LONGEST:core_xfer_shared_libraries:gdb_byte *readbuf, ULONGEST offset, LONGEST len:readbuf, offset, len
 607
 608 # How the core_stratum layer converts a PTID from a core file to a
 609 # string.
 610 M:char *:core_pid_to_str:ptid_t ptid:ptid
 611
 612 # BFD target to use when generating a core file.
 613 V:const char *:gcore_bfd_target:::0:0:::gdbarch->gcore_bfd_target
 614
 615 # If the elements of C++ vtables are in-place function descriptors rather
 616 # than normal function pointers (which may point to code or a descriptor),
 617 # set this to one.
 618 v:int:vtable_function_descriptors:::0:0::0
 619
 620 # Set if the least significant bit of the delta is used instead of the least
 621 # significant bit of the pfn for pointers to virtual member functions.
 622 v:int:vbit_in_delta:::0:0::0
 623
 624 # Advance PC to next instruction in order to skip a permanent breakpoint.
 625 F:void:skip_permanent_breakpoint:struct regcache *regcache:regcache
 626
 627 # The maximum length of an instruction on this architecture.
 628 V:ULONGEST:max_insn_length:::0:0
 629
 630 # Copy the instruction at FROM to TO, and make any adjustments
 631 # necessary to single-step it at that address.
 632 #
 633 # REGS holds the state the thread's registers will have before
 634 # executing the copied instruction; the PC in REGS will refer to FROM,
 635 # not the copy at TO.  The caller should update it to point at TO later.
 636 #
 637 # Return a pointer to data of the architecture's choice to be passed
 638 # to gdbarch_displaced_step_fixup.  Or, return NULL to indicate that
 639 # the instruction's effects have been completely simulated, with the
 640 # resulting state written back to REGS.
 641 #
 642 # For a general explanation of displaced stepping and how GDB uses it,
 643 # see the comments in infrun.c.
 644 #
 645 # The TO area is only guaranteed to have space for
 646 # gdbarch_max_insn_length (arch) bytes, so this function must not
 647 # write more bytes than that to that area.
 648 #
 649 # If you do not provide this function, GDB assumes that the
 650 # architecture does not support displaced stepping.
 651 #
 652 # If your architecture doesn't need to adjust instructions before
 653 # single-stepping them, consider using simple_displaced_step_copy_insn
 654 # here.
 655 M:struct displaced_step_closure *:displaced_step_copy_insn:CORE_ADDR from, CORE_ADDR to, struct regcache *regs:from, to, regs
 656
 657 # Return true if GDB should use hardware single-stepping to execute
 658 # the displaced instruction identified by CLOSURE.  If false,
 659 # GDB will simply restart execution at the displaced instruction
 660 # location, and it is up to the target to ensure GDB will receive
 661 # control again (e.g. by placing a software breakpoint instruction
 662 # into the displaced instruction buffer).
 663 #
 664 # The default implementation returns false on all targets that
 665 # provide a gdbarch_software_single_step routine, and true otherwise.
 666 m:int:displaced_step_hw_singlestep:struct displaced_step_closure *closure:closure::default_displaced_step_hw_singlestep::0
 667
 668 # Fix up the state resulting from successfully single-stepping a
 669 # displaced instruction, to give the result we would have gotten from
 670 # stepping the instruction in its original location.
 671 #
 672 # REGS is the register state resulting from single-stepping the
 673 # displaced instruction.
 674 #
 675 # CLOSURE is the result from the matching call to
 676 # gdbarch_displaced_step_copy_insn.
 677 #
 678 # If you provide gdbarch_displaced_step_copy_insn.but not this
 679 # function, then GDB assumes that no fixup is needed after
 680 # single-stepping the instruction.
 681 #
 682 # For a general explanation of displaced stepping and how GDB uses it,
 683 # see the comments in infrun.c.
 684 M:void:displaced_step_fixup:struct displaced_step_closure *closure, CORE_ADDR from, CORE_ADDR to, struct regcache *regs:closure, from, to, regs::NULL
 685
 686 # Free a closure returned by gdbarch_displaced_step_copy_insn.
 687 #
 688 # If you provide gdbarch_displaced_step_copy_insn, you must provide
 689 # this function as well.
 690 #
 691 # If your architecture uses closures that don't need to be freed, then
 692 # you can use simple_displaced_step_free_closure here.
 693 #
 694 # For a general explanation of displaced stepping and how GDB uses it,
 695 # see the comments in infrun.c.
 696 m:void:displaced_step_free_closure:struct displaced_step_closure *closure:closure::NULL::(! gdbarch->displaced_step_free_closure) != (! gdbarch->displaced_step_copy_insn)
 697
 698 # Return the address of an appropriate place to put displaced
 699 # instructions while we step over them.  There need only be one such
 700 # place, since we're only stepping one thread over a breakpoint at a
 701 # time.
 702 #
 703 # For a general explanation of displaced stepping and how GDB uses it,
 704 # see the comments in infrun.c.
 705 m:CORE_ADDR:displaced_step_location:void:::NULL::(! gdbarch->displaced_step_location) != (! gdbarch->displaced_step_copy_insn)
 706
 707 # Refresh overlay mapped state for section OSECT.
 708 F:void:overlay_update:struct obj_section *osect:osect
 709
 710 M:const struct target_desc *:core_read_description:struct target_ops *target, bfd *abfd:target, abfd
 711
 712 # Handle special encoding of static variables in stabs debug info.
 713 F:char *:static_transform_name:char *name:name
 714 # Set if the address in N_SO or N_FUN stabs may be zero.
 715 v:int:sofun_address_maybe_missing:::0:0::0
 716
 717 # Parse the instruction at ADDR storing in the record execution log
 718 # the registers REGCACHE and memory ranges that will be affected when
 719 # the instruction executes, along with their current values.
 720 # Return -1 if something goes wrong, 0 otherwise.
 721 M:int:process_record:struct regcache *regcache, CORE_ADDR addr:regcache, addr
 722
 723 # Save process state after a signal.
 724 # Return -1 if something goes wrong, 0 otherwise.
 725 M:int:process_record_signal:struct regcache *regcache, enum target_signal signal:regcache, signal
 726
 727 # Signal translation: translate inferior's signal (host's) number into
 728 # GDB's representation.
 729 m:enum target_signal:target_signal_from_host:int signo:signo::default_target_signal_from_host::0
 730 # Signal translation: translate GDB's signal number into inferior's host
 731 # signal number.
 732 m:int:target_signal_to_host:enum target_signal ts:ts::default_target_signal_to_host::0
 733
 734 # Extra signal info inspection.
 735 #
 736 # Return a type suitable to inspect extra signal information.
 737 M:struct type *:get_siginfo_type:void:
 738
 739 # Record architecture-specific information from the symbol table.
 740 M:void:record_special_symbol:struct objfile *objfile, asymbol *sym:objfile, sym
 741
 742 # Function for the 'catch syscall' feature.
 743
 744 # Get architecture-specific system calls information from registers.
 745 M:LONGEST:get_syscall_number:ptid_t ptid:ptid
 746
 747 # True if the list of shared libraries is one and only for all
 748 # processes, as opposed to a list of shared libraries per inferior.
 749 # This usually means that all processes, although may or may not share
 750 # an address space, will see the same set of symbols at the same
 751 # addresses.
 752 v:int:has_global_solist:::0:0::0
 753
 754 # On some targets, even though each inferior has its own private
 755 # address space, the debug interface takes care of making breakpoints
 756 # visible to all address spaces automatically.  For such cases,
 757 # this property should be set to true.
 758 v:int:has_global_breakpoints:::0:0::0
 759
 760 # True if inferiors share an address space (e.g., uClinux).
 761 m:int:has_shared_address_space:void:::default_has_shared_address_space::0
 762
 763 # True if a fast tracepoint can be set at an address.
 764 m:int:fast_tracepoint_valid_at:CORE_ADDR addr, int *isize, char **msg:addr, isize, msg::default_fast_tracepoint_valid_at::0
 765 EOF
 766 }
 767
 768 #
 769 # The .log file
 770 #
 771 exec > new-gdbarch.log
 772 function_list | while do_read
 773 do
 774     cat <<EOF
 775 ${class} ${returntype} ${function} ($formal)
 776 EOF
 777     for r in ${read}
 778     do
 779         eval echo \"\ \ \ \ ${r}=\${${r}}\"
 780     done
 781     if class_is_predicate_p && fallback_default_p
 782     then
 783         echo "Error: predicate function ${function} can not have a non- multi-arch default" 1>&2
 784         kill $$
 785         exit 1
 786     fi
 787     if [ "x${invalid_p}" = "x0" -a -n "${postdefault}" ]
 788     then
 789         echo "Error: postdefault is useless when invalid_p=0" 1>&2
 790         kill $$
 791         exit 1
 792     fi
 793     if class_is_multiarch_p
 794     then
 795         if class_is_predicate_p ; then :
 796         elif test "x${predefault}" = "x"
 797         then
 798             echo "Error: pure multi-arch function ${function} must have a predefault" 1>&2
 799             kill $$
 800             exit 1
 801         fi
 802     fi
 803     echo ""
 804 done
 805
 806 exec 1>&2
 807 compare_new gdbarch.log
 808
 809
 810 copyright ()
 811 {
 812 cat <<EOF
 813 /* *INDENT-OFF* */ /* THIS FILE IS GENERATED */
 814
 815 /* Dynamic architecture support for GDB, the GNU debugger.
 816
 817    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
 818    2007, 2008, 2009 Free Software Foundation, Inc.
 819
 820    This file is part of GDB.
 821
 822    This program is free software; you can redistribute it and/or modify
 823    it under the terms of the GNU General Public License as published by
 824    the Free Software Foundation; either version 3 of the License, or
 825    (at your option) any later version.
 826
 827    This program is distributed in the hope that it will be useful,
 828    but WITHOUT ANY WARRANTY; without even the implied warranty of
 829    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 830    GNU General Public License for more details.
 831
 832    You should have received a copy of the GNU General Public License
 833    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 834
 835 /* This file was created with the aid of \`\`gdbarch.sh''.
 836
 837    The Bourne shell script \`\`gdbarch.sh'' creates the files
 838    \`\`new-gdbarch.c'' and \`\`new-gdbarch.h and then compares them
 839    against the existing \`\`gdbarch.[hc]''.  Any differences found
 840    being reported.
 841
 842    If editing this file, please also run gdbarch.sh and merge any
 843    changes into that script. Conversely, when making sweeping changes
 844    to this file, modifying gdbarch.sh and using its output may prove
 845    easier. */
 846
 847 EOF
 848 }
 849
 850 #
 851 # The .h file
 852 #
 853
 854 exec > new-gdbarch.h
 855 copyright
 856 cat <<EOF
 857 #ifndef GDBARCH_H
 858 #define GDBARCH_H
 859
 860 struct floatformat;
 861 struct ui_file;
 862 struct frame_info;
 863 struct value;
 864 struct objfile;
 865 struct obj_section;
 866 struct minimal_symbol;
 867 struct regcache;
 868 struct reggroup;
 869 struct regset;
 870 struct disassemble_info;
 871 struct target_ops;
 872 struct obstack;
 873 struct bp_target_info;
 874 struct target_desc;
 875 struct displaced_step_closure;
 876 struct core_regset_section;
 877 struct syscall;
 878
 879 /* The architecture associated with the connection to the target.
 880
 881    The architecture vector provides some information that is really
 882    a property of the target: The layout of certain packets, for instance;
 883    or the solib_ops vector.  Etc.  To differentiate architecture accesses
 884    to per-target properties from per-thread/per-frame/per-objfile properties,
 885    accesses to per-target properties should be made through target_gdbarch.
 886
 887    Eventually, when support for multiple targets is implemented in
 888    GDB, this global should be made target-specific.  */
 889 extern struct gdbarch *target_gdbarch;
 890 EOF
 891
 892 # function typedef's
 893 printf "\n"
 894 printf "\n"
 895 printf "/* The following are pre-initialized by GDBARCH. */\n"
 896 function_list | while do_read
 897 do
 898     if class_is_info_p
 899     then
 900         printf "\n"
 901         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 902         printf "/* set_gdbarch_${function}() - not applicable - pre-initialized. */\n"
 903     fi
 904 done
 905
 906 # function typedef's
 907 printf "\n"
 908 printf "\n"
 909 printf "/* The following are initialized by the target dependent code. */\n"
 910 function_list | while do_read
 911 do
 912     if [ -n "${comment}" ]
 913     then
 914         echo "${comment}" | sed \
 915             -e '2 s,#,/*,' \
 916             -e '3,$ s,#,  ,' \
 917             -e '$ s,$, */,'
 918     fi
 919
 920     if class_is_predicate_p
 921     then
 922         printf "\n"
 923         printf "extern int gdbarch_${function}_p (struct gdbarch *gdbarch);\n"
 924     fi
 925     if class_is_variable_p
 926     then
 927         printf "\n"
 928         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 929         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, ${returntype} ${function});\n"
 930     fi
 931     if class_is_function_p
 932     then
 933         printf "\n"
 934         if [ "x${formal}" = "xvoid" ] && class_is_multiarch_p
 935         then
 936             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch);\n"
 937         elif class_is_multiarch_p
 938         then
 939             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch, ${formal});\n"
 940         else
 941             printf "typedef ${returntype} (gdbarch_${function}_ftype) (${formal});\n"
 942         fi
 943         if [ "x${formal}" = "xvoid" ]
 944         then
 945           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 946         else
 947           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch, ${formal});\n"
 948         fi
 949         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, gdbarch_${function}_ftype *${function});\n"
 950     fi
 951 done
 952
 953 # close it off
 954 cat <<EOF
 955
 956 /* Definition for an unknown syscall, used basically in error-cases.  */
 957 #define UNKNOWN_SYSCALL (-1)
 958
 959 extern struct gdbarch_tdep *gdbarch_tdep (struct gdbarch *gdbarch);
 960
 961
 962 /* Mechanism for co-ordinating the selection of a specific
 963    architecture.
 964
 965    GDB targets (*-tdep.c) can register an interest in a specific
 966    architecture.  Other GDB components can register a need to maintain
 967    per-architecture data.
 968
 969    The mechanisms below ensures that there is only a loose connection
 970    between the set-architecture command and the various GDB
 971    components.  Each component can independently register their need
 972    to maintain architecture specific data with gdbarch.
 973
 974    Pragmatics:
 975
 976    Previously, a single TARGET_ARCHITECTURE_HOOK was provided.  It
 977    didn't scale.
 978
 979    The more traditional mega-struct containing architecture specific
 980    data for all the various GDB components was also considered.  Since
 981    GDB is built from a variable number of (fairly independent)
 982    components it was determined that the global aproach was not
 983    applicable. */
 984
 985
 986 /* Register a new architectural family with GDB.
 987
 988    Register support for the specified ARCHITECTURE with GDB.  When
 989    gdbarch determines that the specified architecture has been
 990    selected, the corresponding INIT function is called.
 991
 992    --
 993
 994    The INIT function takes two parameters: INFO which contains the
 995    information available to gdbarch about the (possibly new)
 996    architecture; ARCHES which is a list of the previously created
 997    \`\`struct gdbarch'' for this architecture.
 998
 999    The INFO parameter is, as far as possible, be pre-initialized with
1000    information obtained from INFO.ABFD or the global defaults.
1001
1002    The ARCHES parameter is a linked list (sorted most recently used)
1003    of all the previously created architures for this architecture
1004    family.  The (possibly NULL) ARCHES->gdbarch can used to access
1005    values from the previously selected architecture for this
1006    architecture family.
1007
1008    The INIT function shall return any of: NULL - indicating that it
1009    doesn't recognize the selected architecture; an existing \`\`struct
1010    gdbarch'' from the ARCHES list - indicating that the new
1011    architecture is just a synonym for an earlier architecture (see
1012    gdbarch_list_lookup_by_info()); a newly created \`\`struct gdbarch''
1013    - that describes the selected architecture (see gdbarch_alloc()).
1014
1015    The DUMP_TDEP function shall print out all target specific values.
1016    Care should be taken to ensure that the function works in both the
1017    multi-arch and non- multi-arch cases. */
1018
1019 struct gdbarch_list
1020 {
1021   struct gdbarch *gdbarch;
1022   struct gdbarch_list *next;
1023 };
1024
1025 struct gdbarch_info
1026 {
1027   /* Use default: NULL (ZERO). */
1028   const struct bfd_arch_info *bfd_arch_info;
1029
1030   /* Use default: BFD_ENDIAN_UNKNOWN (NB: is not ZERO).  */
1031   int byte_order;
1032
1033   int byte_order_for_code;
1034
1035   /* Use default: NULL (ZERO). */
1036   bfd *abfd;
1037
1038   /* Use default: NULL (ZERO). */
1039   struct gdbarch_tdep_info *tdep_info;
1040
1041   /* Use default: GDB_OSABI_UNINITIALIZED (-1).  */
1042   enum gdb_osabi osabi;
1043
1044   /* Use default: NULL (ZERO).  */
1045   const struct target_desc *target_desc;
1046 };
1047
1048 typedef struct gdbarch *(gdbarch_init_ftype) (struct gdbarch_info info, struct gdbarch_list *arches);
1049 typedef void (gdbarch_dump_tdep_ftype) (struct gdbarch *gdbarch, struct ui_file *file);
1050
1051 /* DEPRECATED - use gdbarch_register() */
1052 extern void register_gdbarch_init (enum bfd_architecture architecture, gdbarch_init_ftype *);
1053
1054 extern void gdbarch_register (enum bfd_architecture architecture,
1055                               gdbarch_init_ftype *,
1056                               gdbarch_dump_tdep_ftype *);
1057
1058
1059 /* Return a freshly allocated, NULL terminated, array of the valid
1060    architecture names.  Since architectures are registered during the
1061    _initialize phase this function only returns useful information
1062    once initialization has been completed. */
1063
1064 extern const char **gdbarch_printable_names (void);
1065
1066
1067 /* Helper function.  Search the list of ARCHES for a GDBARCH that
1068    matches the information provided by INFO. */
1069
1070 extern struct gdbarch_list *gdbarch_list_lookup_by_info (struct gdbarch_list *arches, const struct gdbarch_info *info);
1071
1072
1073 /* Helper function.  Create a preliminary \`\`struct gdbarch''.  Perform
1074    basic initialization using values obtained from the INFO and TDEP
1075    parameters.  set_gdbarch_*() functions are called to complete the
1076    initialization of the object. */
1077
1078 extern struct gdbarch *gdbarch_alloc (const struct gdbarch_info *info, struct gdbarch_tdep *tdep);
1079
1080
1081 /* Helper function.  Free a partially-constructed \`\`struct gdbarch''.
1082    It is assumed that the caller freeds the \`\`struct
1083    gdbarch_tdep''. */
1084
1085 extern void gdbarch_free (struct gdbarch *);
1086
1087
1088 /* Helper function.  Allocate memory from the \`\`struct gdbarch''
1089    obstack.  The memory is freed when the corresponding architecture
1090    is also freed.  */
1091
1092 extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
1093 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
1094 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
1095
1096
1097 /* Helper function. Force an update of the current architecture.
1098
1099    The actual architecture selected is determined by INFO, \`\`(gdb) set
1100    architecture'' et.al., the existing architecture and BFD's default
1101    architecture.  INFO should be initialized to zero and then selected
1102    fields should be updated.
1103
1104    Returns non-zero if the update succeeds */
1105
1106 extern int gdbarch_update_p (struct gdbarch_info info);
1107
1108
1109 /* Helper function.  Find an architecture matching info.
1110
1111    INFO should be initialized using gdbarch_info_init, relevant fields
1112    set, and then finished using gdbarch_info_fill.
1113
1114    Returns the corresponding architecture, or NULL if no matching
1115    architecture was found.  */
1116
1117 extern struct gdbarch *gdbarch_find_by_info (struct gdbarch_info info);
1118
1119
1120 /* Helper function.  Set the global "target_gdbarch" to "gdbarch".
1121
1122    FIXME: kettenis/20031124: Of the functions that follow, only
1123    gdbarch_from_bfd is supposed to survive.  The others will
1124    dissappear since in the future GDB will (hopefully) be truly
1125    multi-arch.  However, for now we're still stuck with the concept of
1126    a single active architecture.  */
1127
1128 extern void deprecated_target_gdbarch_select_hack (struct gdbarch *gdbarch);
1129
1130
1131 /* Register per-architecture data-pointer.
1132
1133    Reserve space for a per-architecture data-pointer.  An identifier
1134    for the reserved data-pointer is returned.  That identifer should
1135    be saved in a local static variable.
1136
1137    Memory for the per-architecture data shall be allocated using
1138    gdbarch_obstack_zalloc.  That memory will be deleted when the
1139    corresponding architecture object is deleted.
1140
1141    When a previously created architecture is re-selected, the
1142    per-architecture data-pointer for that previous architecture is
1143    restored.  INIT() is not re-called.
1144
1145    Multiple registrarants for any architecture are allowed (and
1146    strongly encouraged).  */
1147
1148 struct gdbarch_data;
1149
1150 typedef void *(gdbarch_data_pre_init_ftype) (struct obstack *obstack);
1151 extern struct gdbarch_data *gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *init);
1152 typedef void *(gdbarch_data_post_init_ftype) (struct gdbarch *gdbarch);
1153 extern struct gdbarch_data *gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *init);
1154 extern void deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1155                                          struct gdbarch_data *data,
1156                                          void *pointer);
1157
1158 extern void *gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *);
1159
1160
1161 /* Set the dynamic target-system-dependent parameters (architecture,
1162    byte-order, ...) using information found in the BFD */
1163
1164 extern void set_gdbarch_from_file (bfd *);
1165
1166
1167 /* Initialize the current architecture to the "first" one we find on
1168    our list.  */
1169
1170 extern void initialize_current_architecture (void);
1171
1172 /* gdbarch trace variable */
1173 extern int gdbarch_debug;
1174
1175 extern void gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file);
1176
1177 #endif
1178 EOF
1179 exec 1>&2
1180 #../move-if-change new-gdbarch.h gdbarch.h
1181 compare_new gdbarch.h
1182
1183
1184 #
1185 # C file
1186 #
1187
1188 exec > new-gdbarch.c
1189 copyright
1190 cat <<EOF
1191
1192 #include "defs.h"
1193 #include "arch-utils.h"
1194
1195 #include "gdbcmd.h"
1196 #include "inferior.h"
1197 #include "symcat.h"
1198
1199 #include "floatformat.h"
1200
1201 #include "gdb_assert.h"
1202 #include "gdb_string.h"
1203 #include "reggroups.h"
1204 #include "osabi.h"
1205 #include "gdb_obstack.h"
1206 #include "observer.h"
1207 #include "regcache.h"
1208
1209 /* Static function declarations */
1210
1211 static void alloc_gdbarch_data (struct gdbarch *);
1212
1213 /* Non-zero if we want to trace architecture code.  */
1214
1215 #ifndef GDBARCH_DEBUG
1216 #define GDBARCH_DEBUG 0
1217 #endif
1218 int gdbarch_debug = GDBARCH_DEBUG;
1219 static void
1220 show_gdbarch_debug (struct ui_file *file, int from_tty,
1221                     struct cmd_list_element *c, const char *value)
1222 {
1223   fprintf_filtered (file, _("Architecture debugging is %s.\\n"), value);
1224 }
1225
1226 static const char *
1227 pformat (const struct floatformat **format)
1228 {
1229   if (format == NULL)
1230     return "(null)";
1231   else
1232     /* Just print out one of them - this is only for diagnostics.  */
1233     return format[0]->name;
1234 }
1235
1236 EOF
1237
1238 # gdbarch open the gdbarch object
1239 printf "\n"
1240 printf "/* Maintain the struct gdbarch object */\n"
1241 printf "\n"
1242 printf "struct gdbarch\n"
1243 printf "{\n"
1244 printf "  /* Has this architecture been fully initialized?  */\n"
1245 printf "  int initialized_p;\n"
1246 printf "\n"
1247 printf "  /* An obstack bound to the lifetime of the architecture.  */\n"
1248 printf "  struct obstack *obstack;\n"
1249 printf "\n"
1250 printf "  /* basic architectural information */\n"
1251 function_list | while do_read
1252 do
1253     if class_is_info_p
1254     then
1255         printf "  ${returntype} ${function};\n"
1256     fi
1257 done
1258 printf "\n"
1259 printf "  /* target specific vector. */\n"
1260 printf "  struct gdbarch_tdep *tdep;\n"
1261 printf "  gdbarch_dump_tdep_ftype *dump_tdep;\n"
1262 printf "\n"
1263 printf "  /* per-architecture data-pointers */\n"
1264 printf "  unsigned nr_data;\n"
1265 printf "  void **data;\n"
1266 printf "\n"
1267 printf "  /* per-architecture swap-regions */\n"
1268 printf "  struct gdbarch_swap *swap;\n"
1269 printf "\n"
1270 cat <<EOF
1271   /* Multi-arch values.
1272
1273      When extending this structure you must:
1274
1275      Add the field below.
1276
1277      Declare set/get functions and define the corresponding
1278      macro in gdbarch.h.
1279
1280      gdbarch_alloc(): If zero/NULL is not a suitable default,
1281      initialize the new field.
1282
1283      verify_gdbarch(): Confirm that the target updated the field
1284      correctly.
1285
1286      gdbarch_dump(): Add a fprintf_unfiltered call so that the new
1287      field is dumped out
1288
1289      \`\`startup_gdbarch()'': Append an initial value to the static
1290      variable (base values on the host's c-type system).
1291
1292      get_gdbarch(): Implement the set/get functions (probably using
1293      the macro's as shortcuts).
1294
1295      */
1296
1297 EOF
1298 function_list | while do_read
1299 do
1300     if class_is_variable_p
1301     then
1302         printf "  ${returntype} ${function};\n"
1303     elif class_is_function_p
1304     then
1305         printf "  gdbarch_${function}_ftype *${function};\n"
1306     fi
1307 done
1308 printf "};\n"
1309
1310 # A pre-initialized vector
1311 printf "\n"
1312 printf "\n"
1313 cat <<EOF
1314 /* The default architecture uses host values (for want of a better
1315    choice). */
1316 EOF
1317 printf "\n"
1318 printf "extern const struct bfd_arch_info bfd_default_arch_struct;\n"
1319 printf "\n"
1320 printf "struct gdbarch startup_gdbarch =\n"
1321 printf "{\n"
1322 printf "  1, /* Always initialized.  */\n"
1323 printf "  NULL, /* The obstack.  */\n"
1324 printf "  /* basic architecture information */\n"
1325 function_list | while do_read
1326 do
1327     if class_is_info_p
1328     then
1329         printf "  ${staticdefault},  /* ${function} */\n"
1330     fi
1331 done
1332 cat <<EOF
1333   /* target specific vector and its dump routine */
1334   NULL, NULL,
1335   /*per-architecture data-pointers and swap regions */
1336   0, NULL, NULL,
1337   /* Multi-arch values */
1338 EOF
1339 function_list | while do_read
1340 do
1341     if class_is_function_p || class_is_variable_p
1342     then
1343         printf "  ${staticdefault},  /* ${function} */\n"
1344     fi
1345 done
1346 cat <<EOF
1347   /* startup_gdbarch() */
1348 };
1349
1350 struct gdbarch *target_gdbarch = &startup_gdbarch;
1351 EOF
1352
1353 # Create a new gdbarch struct
1354 cat <<EOF
1355
1356 /* Create a new \`\`struct gdbarch'' based on information provided by
1357    \`\`struct gdbarch_info''. */
1358 EOF
1359 printf "\n"
1360 cat <<EOF
1361 struct gdbarch *
1362 gdbarch_alloc (const struct gdbarch_info *info,
1363                struct gdbarch_tdep *tdep)
1364 {
1365   struct gdbarch *gdbarch;
1366
1367   /* Create an obstack for allocating all the per-architecture memory,
1368      then use that to allocate the architecture vector.  */
1369   struct obstack *obstack = XMALLOC (struct obstack);
1370   obstack_init (obstack);
1371   gdbarch = obstack_alloc (obstack, sizeof (*gdbarch));
1372   memset (gdbarch, 0, sizeof (*gdbarch));
1373   gdbarch->obstack = obstack;
1374
1375   alloc_gdbarch_data (gdbarch);
1376
1377   gdbarch->tdep = tdep;
1378 EOF
1379 printf "\n"
1380 function_list | while do_read
1381 do
1382     if class_is_info_p
1383     then
1384         printf "  gdbarch->${function} = info->${function};\n"
1385     fi
1386 done
1387 printf "\n"
1388 printf "  /* Force the explicit initialization of these. */\n"
1389 function_list | while do_read
1390 do
1391     if class_is_function_p || class_is_variable_p
1392     then
1393         if [ -n "${predefault}" -a "x${predefault}" != "x0" ]
1394         then
1395           printf "  gdbarch->${function} = ${predefault};\n"
1396         fi
1397     fi
1398 done
1399 cat <<EOF
1400   /* gdbarch_alloc() */
1401
1402   return gdbarch;
1403 }
1404 EOF
1405
1406 # Free a gdbarch struct.
1407 printf "\n"
1408 printf "\n"
1409 cat <<EOF
1410 /* Allocate extra space using the per-architecture obstack.  */
1411
1412 void *
1413 gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
1414 {
1415   void *data = obstack_alloc (arch->obstack, size);
1416   memset (data, 0, size);
1417   return data;
1418 }
1419
1420
1421 /* Free a gdbarch struct.  This should never happen in normal
1422    operation --- once you've created a gdbarch, you keep it around.
1423    However, if an architecture's init function encounters an error
1424    building the structure, it may need to clean up a partially
1425    constructed gdbarch.  */
1426
1427 void
1428 gdbarch_free (struct gdbarch *arch)
1429 {
1430   struct obstack *obstack;
1431   gdb_assert (arch != NULL);
1432   gdb_assert (!arch->initialized_p);
1433   obstack = arch->obstack;
1434   obstack_free (obstack, 0); /* Includes the ARCH.  */
1435   xfree (obstack);
1436 }
1437 EOF
1438
1439 # verify a new architecture
1440 cat <<EOF
1441
1442
1443 /* Ensure that all values in a GDBARCH are reasonable.  */
1444
1445 static void
1446 verify_gdbarch (struct gdbarch *gdbarch)
1447 {
1448   struct ui_file *log;
1449   struct cleanup *cleanups;
1450   long length;
1451   char *buf;
1452   log = mem_fileopen ();
1453   cleanups = make_cleanup_ui_file_delete (log);
1454   /* fundamental */
1455   if (gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)
1456     fprintf_unfiltered (log, "\n\tbyte-order");
1457   if (gdbarch->bfd_arch_info == NULL)
1458     fprintf_unfiltered (log, "\n\tbfd_arch_info");
1459   /* Check those that need to be defined for the given multi-arch level. */
1460 EOF
1461 function_list | while do_read
1462 do
1463     if class_is_function_p || class_is_variable_p
1464     then
1465         if [ "x${invalid_p}" = "x0" ]
1466         then
1467             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1468         elif class_is_predicate_p
1469         then
1470             printf "  /* Skip verify of ${function}, has predicate */\n"
1471         # FIXME: See do_read for potential simplification
1472         elif [ -n "${invalid_p}" -a -n "${postdefault}" ]
1473         then
1474             printf "  if (${invalid_p})\n"
1475             printf "    gdbarch->${function} = ${postdefault};\n"
1476         elif [ -n "${predefault}" -a -n "${postdefault}" ]
1477         then
1478             printf "  if (gdbarch->${function} == ${predefault})\n"
1479             printf "    gdbarch->${function} = ${postdefault};\n"
1480         elif [ -n "${postdefault}" ]
1481         then
1482             printf "  if (gdbarch->${function} == 0)\n"
1483             printf "    gdbarch->${function} = ${postdefault};\n"
1484         elif [ -n "${invalid_p}" ]
1485         then
1486             printf "  if (${invalid_p})\n"
1487             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1488         elif [ -n "${predefault}" ]
1489         then
1490             printf "  if (gdbarch->${function} == ${predefault})\n"
1491             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1492         fi
1493     fi
1494 done
1495 cat <<EOF
1496   buf = ui_file_xstrdup (log, &length);
1497   make_cleanup (xfree, buf);
1498   if (length > 0)
1499     internal_error (__FILE__, __LINE__,
1500                     _("verify_gdbarch: the following are invalid ...%s"),
1501                     buf);
1502   do_cleanups (cleanups);
1503 }
1504 EOF
1505
1506 # dump the structure
1507 printf "\n"
1508 printf "\n"
1509 cat <<EOF
1510 /* Print out the details of the current architecture. */
1511
1512 void
1513 gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
1514 {
1515   const char *gdb_nm_file = "<not-defined>";
1516 #if defined (GDB_NM_FILE)
1517   gdb_nm_file = GDB_NM_FILE;
1518 #endif
1519   fprintf_unfiltered (file,
1520                       "gdbarch_dump: GDB_NM_FILE = %s\\n",
1521                       gdb_nm_file);
1522 EOF
1523 function_list | sort -t: -k 3 | while do_read
1524 do
1525     # First the predicate
1526     if class_is_predicate_p
1527     then
1528         printf "  fprintf_unfiltered (file,\n"
1529         printf "                      \"gdbarch_dump: gdbarch_${function}_p() = %%d\\\\n\",\n"
1530         printf "                      gdbarch_${function}_p (gdbarch));\n"
1531     fi
1532     # Print the corresponding value.
1533     if class_is_function_p
1534     then
1535         printf "  fprintf_unfiltered (file,\n"
1536         printf "                      \"gdbarch_dump: ${function} = <%%s>\\\\n\",\n"
1537         printf "                      host_address_to_string (gdbarch->${function}));\n"
1538     else
1539         # It is a variable
1540         case "${print}:${returntype}" in
1541             :CORE_ADDR )
1542                 fmt="%s"
1543                 print="core_addr_to_string_nz (gdbarch->${function})"
1544                 ;;
1545             :* )
1546                 fmt="%s"
1547                 print="plongest (gdbarch->${function})"
1548                 ;;
1549             * )
1550                 fmt="%s"
1551                 ;;
1552         esac
1553         printf "  fprintf_unfiltered (file,\n"
1554         printf "                      \"gdbarch_dump: ${function} = %s\\\\n\",\n" "${fmt}"
1555         printf "                      ${print});\n"
1556     fi
1557 done
1558 cat <<EOF
1559   if (gdbarch->dump_tdep != NULL)
1560     gdbarch->dump_tdep (gdbarch, file);
1561 }
1562 EOF
1563
1564
1565 # GET/SET
1566 printf "\n"
1567 cat <<EOF
1568 struct gdbarch_tdep *
1569 gdbarch_tdep (struct gdbarch *gdbarch)
1570 {
1571   if (gdbarch_debug >= 2)
1572     fprintf_unfiltered (gdb_stdlog, "gdbarch_tdep called\\n");
1573   return gdbarch->tdep;
1574 }
1575 EOF
1576 printf "\n"
1577 function_list | while do_read
1578 do
1579     if class_is_predicate_p
1580     then
1581         printf "\n"
1582         printf "int\n"
1583         printf "gdbarch_${function}_p (struct gdbarch *gdbarch)\n"
1584         printf "{\n"
1585         printf "  gdb_assert (gdbarch != NULL);\n"
1586         printf "  return ${predicate};\n"
1587         printf "}\n"
1588     fi
1589     if class_is_function_p
1590     then
1591         printf "\n"
1592         printf "${returntype}\n"
1593         if [ "x${formal}" = "xvoid" ]
1594         then
1595           printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1596         else
1597           printf "gdbarch_${function} (struct gdbarch *gdbarch, ${formal})\n"
1598         fi
1599         printf "{\n"
1600         printf "  gdb_assert (gdbarch != NULL);\n"
1601         printf "  gdb_assert (gdbarch->${function} != NULL);\n"
1602         if class_is_predicate_p && test -n "${predefault}"
1603         then
1604             # Allow a call to a function with a predicate.
1605             printf "  /* Do not check predicate: ${predicate}, allow call.  */\n"
1606         fi
1607         printf "  if (gdbarch_debug >= 2)\n"
1608         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1609         if [ "x${actual}" = "x-" -o "x${actual}" = "x" ]
1610         then
1611             if class_is_multiarch_p
1612             then
1613                 params="gdbarch"
1614             else
1615                 params=""
1616             fi
1617         else
1618             if class_is_multiarch_p
1619             then
1620                 params="gdbarch, ${actual}"
1621             else
1622                 params="${actual}"
1623             fi
1624         fi
1625         if [ "x${returntype}" = "xvoid" ]
1626         then
1627           printf "  gdbarch->${function} (${params});\n"
1628         else
1629           printf "  return gdbarch->${function} (${params});\n"
1630         fi
1631         printf "}\n"
1632         printf "\n"
1633         printf "void\n"
1634         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1635         printf "            `echo ${function} | sed -e 's/./ /g'`  gdbarch_${function}_ftype ${function})\n"
1636         printf "{\n"
1637         printf "  gdbarch->${function} = ${function};\n"
1638         printf "}\n"
1639     elif class_is_variable_p
1640     then
1641         printf "\n"
1642         printf "${returntype}\n"
1643         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1644         printf "{\n"
1645         printf "  gdb_assert (gdbarch != NULL);\n"
1646         if [ "x${invalid_p}" = "x0" ]
1647         then
1648             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1649         elif [ -n "${invalid_p}" ]
1650         then
1651             printf "  /* Check variable is valid.  */\n"
1652             printf "  gdb_assert (!(${invalid_p}));\n"
1653         elif [ -n "${predefault}" ]
1654         then
1655             printf "  /* Check variable changed from pre-default.  */\n"
1656             printf "  gdb_assert (gdbarch->${function} != ${predefault});\n"
1657         fi
1658         printf "  if (gdbarch_debug >= 2)\n"
1659         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1660         printf "  return gdbarch->${function};\n"
1661         printf "}\n"
1662         printf "\n"
1663         printf "void\n"
1664         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1665         printf "            `echo ${function} | sed -e 's/./ /g'`  ${returntype} ${function})\n"
1666         printf "{\n"
1667         printf "  gdbarch->${function} = ${function};\n"
1668         printf "}\n"
1669     elif class_is_info_p
1670     then
1671         printf "\n"
1672         printf "${returntype}\n"
1673         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1674         printf "{\n"
1675         printf "  gdb_assert (gdbarch != NULL);\n"
1676         printf "  if (gdbarch_debug >= 2)\n"
1677         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1678         printf "  return gdbarch->${function};\n"
1679         printf "}\n"
1680     fi
1681 done
1682
1683 # All the trailing guff
1684 cat <<EOF
1685
1686
1687 /* Keep a registry of per-architecture data-pointers required by GDB
1688    modules. */
1689
1690 struct gdbarch_data
1691 {
1692   unsigned index;
1693   int init_p;
1694   gdbarch_data_pre_init_ftype *pre_init;
1695   gdbarch_data_post_init_ftype *post_init;
1696 };
1697
1698 struct gdbarch_data_registration
1699 {
1700   struct gdbarch_data *data;
1701   struct gdbarch_data_registration *next;
1702 };
1703
1704 struct gdbarch_data_registry
1705 {
1706   unsigned nr;
1707   struct gdbarch_data_registration *registrations;
1708 };
1709
1710 struct gdbarch_data_registry gdbarch_data_registry =
1711 {
1712   0, NULL,
1713 };
1714
1715 static struct gdbarch_data *
1716 gdbarch_data_register (gdbarch_data_pre_init_ftype *pre_init,
1717                        gdbarch_data_post_init_ftype *post_init)
1718 {
1719   struct gdbarch_data_registration **curr;
1720   /* Append the new registraration.  */
1721   for (curr = &gdbarch_data_registry.registrations;
1722        (*curr) != NULL;
1723        curr = &(*curr)->next);
1724   (*curr) = XMALLOC (struct gdbarch_data_registration);
1725   (*curr)->next = NULL;
1726   (*curr)->data = XMALLOC (struct gdbarch_data);
1727   (*curr)->data->index = gdbarch_data_registry.nr++;
1728   (*curr)->data->pre_init = pre_init;
1729   (*curr)->data->post_init = post_init;
1730   (*curr)->data->init_p = 1;
1731   return (*curr)->data;
1732 }
1733
1734 struct gdbarch_data *
1735 gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *pre_init)
1736 {
1737   return gdbarch_data_register (pre_init, NULL);
1738 }
1739
1740 struct gdbarch_data *
1741 gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *post_init)
1742 {
1743   return gdbarch_data_register (NULL, post_init);
1744 }
1745
1746 /* Create/delete the gdbarch data vector. */
1747
1748 static void
1749 alloc_gdbarch_data (struct gdbarch *gdbarch)
1750 {
1751   gdb_assert (gdbarch->data == NULL);
1752   gdbarch->nr_data = gdbarch_data_registry.nr;
1753   gdbarch->data = GDBARCH_OBSTACK_CALLOC (gdbarch, gdbarch->nr_data, void *);
1754 }
1755
1756 /* Initialize the current value of the specified per-architecture
1757    data-pointer. */
1758
1759 void
1760 deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1761                              struct gdbarch_data *data,
1762                              void *pointer)
1763 {
1764   gdb_assert (data->index < gdbarch->nr_data);
1765   gdb_assert (gdbarch->data[data->index] == NULL);
1766   gdb_assert (data->pre_init == NULL);
1767   gdbarch->data[data->index] = pointer;
1768 }
1769
1770 /* Return the current value of the specified per-architecture
1771    data-pointer. */
1772
1773 void *
1774 gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *data)
1775 {
1776   gdb_assert (data->index < gdbarch->nr_data);
1777   if (gdbarch->data[data->index] == NULL)
1778     {
1779       /* The data-pointer isn't initialized, call init() to get a
1780          value.  */
1781       if (data->pre_init != NULL)
1782         /* Mid architecture creation: pass just the obstack, and not
1783            the entire architecture, as that way it isn't possible for
1784            pre-init code to refer to undefined architecture
1785            fields.  */
1786         gdbarch->data[data->index] = data->pre_init (gdbarch->obstack);
1787       else if (gdbarch->initialized_p
1788                && data->post_init != NULL)
1789         /* Post architecture creation: pass the entire architecture
1790            (as all fields are valid), but be careful to also detect
1791            recursive references.  */
1792         {
1793           gdb_assert (data->init_p);
1794           data->init_p = 0;
1795           gdbarch->data[data->index] = data->post_init (gdbarch);
1796           data->init_p = 1;
1797         }
1798       else
1799         /* The architecture initialization hasn't completed - punt -
1800          hope that the caller knows what they are doing.  Once
1801          deprecated_set_gdbarch_data has been initialized, this can be
1802          changed to an internal error.  */
1803         return NULL;
1804       gdb_assert (gdbarch->data[data->index] != NULL);
1805     }
1806   return gdbarch->data[data->index];
1807 }
1808
1809
1810 /* Keep a registry of the architectures known by GDB. */
1811
1812 struct gdbarch_registration
1813 {
1814   enum bfd_architecture bfd_architecture;
1815   gdbarch_init_ftype *init;
1816   gdbarch_dump_tdep_ftype *dump_tdep;
1817   struct gdbarch_list *arches;
1818   struct gdbarch_registration *next;
1819 };
1820
1821 static struct gdbarch_registration *gdbarch_registry = NULL;
1822
1823 static void
1824 append_name (const char ***buf, int *nr, const char *name)
1825 {
1826   *buf = xrealloc (*buf, sizeof (char**) * (*nr + 1));
1827   (*buf)[*nr] = name;
1828   *nr += 1;
1829 }
1830
1831 const char **
1832 gdbarch_printable_names (void)
1833 {
1834   /* Accumulate a list of names based on the registed list of
1835      architectures. */
1836   enum bfd_architecture a;
1837   int nr_arches = 0;
1838   const char **arches = NULL;
1839   struct gdbarch_registration *rego;
1840   for (rego = gdbarch_registry;
1841        rego != NULL;
1842        rego = rego->next)
1843     {
1844       const struct bfd_arch_info *ap;
1845       ap = bfd_lookup_arch (rego->bfd_architecture, 0);
1846       if (ap == NULL)
1847         internal_error (__FILE__, __LINE__,
1848                         _("gdbarch_architecture_names: multi-arch unknown"));
1849       do
1850         {
1851           append_name (&arches, &nr_arches, ap->printable_name);
1852           ap = ap->next;
1853         }
1854       while (ap != NULL);
1855     }
1856   append_name (&arches, &nr_arches, NULL);
1857   return arches;
1858 }
1859
1860
1861 void
1862 gdbarch_register (enum bfd_architecture bfd_architecture,
1863                   gdbarch_init_ftype *init,
1864                   gdbarch_dump_tdep_ftype *dump_tdep)
1865 {
1866   struct gdbarch_registration **curr;
1867   const struct bfd_arch_info *bfd_arch_info;
1868   /* Check that BFD recognizes this architecture */
1869   bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0);
1870   if (bfd_arch_info == NULL)
1871     {
1872       internal_error (__FILE__, __LINE__,
1873                       _("gdbarch: Attempt to register unknown architecture (%d)"),
1874                       bfd_architecture);
1875     }
1876   /* Check that we haven't seen this architecture before */
1877   for (curr = &gdbarch_registry;
1878        (*curr) != NULL;
1879        curr = &(*curr)->next)
1880     {
1881       if (bfd_architecture == (*curr)->bfd_architecture)
1882         internal_error (__FILE__, __LINE__,
1883                         _("gdbarch: Duplicate registraration of architecture (%s)"),
1884                         bfd_arch_info->printable_name);
1885     }
1886   /* log it */
1887   if (gdbarch_debug)
1888     fprintf_unfiltered (gdb_stdlog, "register_gdbarch_init (%s, %s)\n",
1889                         bfd_arch_info->printable_name,
1890                         host_address_to_string (init));
1891   /* Append it */
1892   (*curr) = XMALLOC (struct gdbarch_registration);
1893   (*curr)->bfd_architecture = bfd_architecture;
1894   (*curr)->init = init;
1895   (*curr)->dump_tdep = dump_tdep;
1896   (*curr)->arches = NULL;
1897   (*curr)->next = NULL;
1898 }
1899
1900 void
1901 register_gdbarch_init (enum bfd_architecture bfd_architecture,
1902                        gdbarch_init_ftype *init)
1903 {
1904   gdbarch_register (bfd_architecture, init, NULL);
1905 }
1906
1907
1908 /* Look for an architecture using gdbarch_info.  */
1909
1910 struct gdbarch_list *
1911 gdbarch_list_lookup_by_info (struct gdbarch_list *arches,
1912                              const struct gdbarch_info *info)
1913 {
1914   for (; arches != NULL; arches = arches->next)
1915     {
1916       if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info)
1917         continue;
1918       if (info->byte_order != arches->gdbarch->byte_order)
1919         continue;
1920       if (info->osabi != arches->gdbarch->osabi)
1921         continue;
1922       if (info->target_desc != arches->gdbarch->target_desc)
1923         continue;
1924       return arches;
1925     }
1926   return NULL;
1927 }
1928
1929
1930 /* Find an architecture that matches the specified INFO.  Create a new
1931    architecture if needed.  Return that new architecture.  */
1932
1933 struct gdbarch *
1934 gdbarch_find_by_info (struct gdbarch_info info)
1935 {
1936   struct gdbarch *new_gdbarch;
1937   struct gdbarch_registration *rego;
1938
1939   /* Fill in missing parts of the INFO struct using a number of
1940      sources: "set ..."; INFOabfd supplied; and the global
1941      defaults.  */
1942   gdbarch_info_fill (&info);
1943
1944   /* Must have found some sort of architecture. */
1945   gdb_assert (info.bfd_arch_info != NULL);
1946
1947   if (gdbarch_debug)
1948     {
1949       fprintf_unfiltered (gdb_stdlog,
1950                           "gdbarch_find_by_info: info.bfd_arch_info %s\n",
1951                           (info.bfd_arch_info != NULL
1952                            ? info.bfd_arch_info->printable_name
1953                            : "(null)"));
1954       fprintf_unfiltered (gdb_stdlog,
1955                           "gdbarch_find_by_info: info.byte_order %d (%s)\n",
1956                           info.byte_order,
1957                           (info.byte_order == BFD_ENDIAN_BIG ? "big"
1958                            : info.byte_order == BFD_ENDIAN_LITTLE ? "little"
1959                            : "default"));
1960       fprintf_unfiltered (gdb_stdlog,
1961                           "gdbarch_find_by_info: info.osabi %d (%s)\n",
1962                           info.osabi, gdbarch_osabi_name (info.osabi));
1963       fprintf_unfiltered (gdb_stdlog,
1964                           "gdbarch_find_by_info: info.abfd %s\n",
1965                           host_address_to_string (info.abfd));
1966       fprintf_unfiltered (gdb_stdlog,
1967                           "gdbarch_find_by_info: info.tdep_info %s\n",
1968                           host_address_to_string (info.tdep_info));
1969     }
1970
1971   /* Find the tdep code that knows about this architecture.  */
1972   for (rego = gdbarch_registry;
1973        rego != NULL;
1974        rego = rego->next)
1975     if (rego->bfd_architecture == info.bfd_arch_info->arch)
1976       break;
1977   if (rego == NULL)
1978     {
1979       if (gdbarch_debug)
1980         fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
1981                             "No matching architecture\n");
1982       return 0;
1983     }
1984
1985   /* Ask the tdep code for an architecture that matches "info".  */
1986   new_gdbarch = rego->init (info, rego->arches);
1987
1988   /* Did the tdep code like it?  No.  Reject the change and revert to
1989      the old architecture.  */
1990   if (new_gdbarch == NULL)
1991     {
1992       if (gdbarch_debug)
1993         fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
1994                             "Target rejected architecture\n");
1995       return NULL;
1996     }
1997
1998   /* Is this a pre-existing architecture (as determined by already
1999      being initialized)?  Move it to the front of the architecture
2000      list (keeping the list sorted Most Recently Used).  */
2001   if (new_gdbarch->initialized_p)
2002     {
2003       struct gdbarch_list **list;
2004       struct gdbarch_list *this;
2005       if (gdbarch_debug)
2006         fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
2007                             "Previous architecture %s (%s) selected\n",
2008                             host_address_to_string (new_gdbarch),
2009                             new_gdbarch->bfd_arch_info->printable_name);
2010       /* Find the existing arch in the list.  */
2011       for (list = &rego->arches;
2012            (*list) != NULL && (*list)->gdbarch != new_gdbarch;
2013            list = &(*list)->next);
2014       /* It had better be in the list of architectures.  */
2015       gdb_assert ((*list) != NULL && (*list)->gdbarch == new_gdbarch);
2016       /* Unlink THIS.  */
2017       this = (*list);
2018       (*list) = this->next;
2019       /* Insert THIS at the front.  */
2020       this->next = rego->arches;
2021       rego->arches = this;
2022       /* Return it.  */
2023       return new_gdbarch;
2024     }
2025
2026   /* It's a new architecture.  */
2027   if (gdbarch_debug)
2028     fprintf_unfiltered (gdb_stdlog, "gdbarch_find_by_info: "
2029                         "New architecture %s (%s) selected\n",
2030                         host_address_to_string (new_gdbarch),
2031                         new_gdbarch->bfd_arch_info->printable_name);
2032
2033   /* Insert the new architecture into the front of the architecture
2034      list (keep the list sorted Most Recently Used).  */
2035   {
2036     struct gdbarch_list *this = XMALLOC (struct gdbarch_list);
2037     this->next = rego->arches;
2038     this->gdbarch = new_gdbarch;
2039     rego->arches = this;
2040   }
2041
2042   /* Check that the newly installed architecture is valid.  Plug in
2043      any post init values.  */
2044   new_gdbarch->dump_tdep = rego->dump_tdep;
2045   verify_gdbarch (new_gdbarch);
2046   new_gdbarch->initialized_p = 1;
2047
2048   if (gdbarch_debug)
2049     gdbarch_dump (new_gdbarch, gdb_stdlog);
2050
2051   return new_gdbarch;
2052 }
2053
2054 /* Make the specified architecture current.  */
2055
2056 void
2057 deprecated_target_gdbarch_select_hack (struct gdbarch *new_gdbarch)
2058 {
2059   gdb_assert (new_gdbarch != NULL);
2060   gdb_assert (new_gdbarch->initialized_p);
2061   target_gdbarch = new_gdbarch;
2062   observer_notify_architecture_changed (new_gdbarch);
2063   registers_changed ();
2064 }
2065
2066 extern void _initialize_gdbarch (void);
2067
2068 void
2069 _initialize_gdbarch (void)
2070 {
2071   struct cmd_list_element *c;
2072
2073   add_setshow_zinteger_cmd ("arch", class_maintenance, &gdbarch_debug, _("\\
2074 Set architecture debugging."), _("\\
2075 Show architecture debugging."), _("\\
2076 When non-zero, architecture debugging is enabled."),
2077                             NULL,
2078                             show_gdbarch_debug,
2079                             &setdebuglist, &showdebuglist);
2080 }
2081 EOF
2082
2083 # close things off
2084 exec 1>&2
2085 #../move-if-change new-gdbarch.c gdbarch.c
2086 compare_new gdbarch.c