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 # 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} ${file}" 1>&2
  40     fi
  41 }
  42
  43
  44 # Format of the input table
  45 read="class macro returntype function formal actual staticdefault predefault postdefault invalid_p print garbage_at_eol"
  46
  47 do_read ()
  48 {
  49     comment=""
  50     class=""
  51     while read line
  52     do
  53         if test "${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 $$
  80                 exit 1
  81             fi
  82
  83             # .... and then going back through each field and strip out those
  84             # that ended up with just that space character.
  85             for r in ${read}
  86             do
  87                 if eval test \"\${${r}}\" = \"\ \"
  88                 then
  89                     eval ${r}=""
  90                 fi
  91             done
  92
  93             FUNCTION=`echo ${function} | tr '[a-z]' '[A-Z]'`
  94             if test "x${macro}" = "x="
  95             then
  96                 # Provide a UCASE version of function (for when there isn't MACRO)
  97                 macro="${FUNCTION}"
  98             elif test "${macro}" = "${FUNCTION}"
  99             then
 100                 echo "${function}: Specify = for macro field" 1>&2
 101                 kill $$
 102                 exit 1
 103             fi
 104
 105             # Check that macro definition wasn't supplied for multi-arch
 106             case "${class}" in
 107                 [mM] )
 108                     if test "${macro}" != ""
 109                     then
 110                         echo "Error: Function ${function} multi-arch yet macro ${macro} supplied" 1>&2
 111                         kill $$
 112                         exit 1
 113                     fi
 114             esac
 115
 116             case "${class}" in
 117                 m ) staticdefault="${predefault}" ;;
 118                 M ) staticdefault="0" ;;
 119                 * ) test "${staticdefault}" || staticdefault=0 ;;
 120             esac
 121
 122             case "${class}" in
 123             F | V | M )
 124                 case "${invalid_p}" in
 125                 "" )
 126                     if test -n "${predefault}"
 127                     then
 128                         #invalid_p="gdbarch->${function} == ${predefault}"
 129                         predicate="gdbarch->${function} != ${predefault}"
 130                     elif class_is_variable_p
 131                     then
 132                         predicate="gdbarch->${function} != 0"
 133                     elif class_is_function_p
 134                     then
 135                         predicate="gdbarch->${function} != NULL"
 136                     fi
 137                     ;;
 138                 * )
 139                     echo "Predicate function ${function} with invalid_p." 1>&2
 140                     kill $$
 141                     exit 1
 142                     ;;
 143                 esac
 144             esac
 145
 146             # PREDEFAULT is a valid fallback definition of MEMBER when
 147             # multi-arch is not enabled.  This ensures that the
 148             # default value, when multi-arch is the same as the
 149             # default value when not multi-arch.  POSTDEFAULT is
 150             # always a valid definition of MEMBER as this again
 151             # ensures consistency.
 152
 153             if [ -n "${postdefault}" ]
 154             then
 155                 fallbackdefault="${postdefault}"
 156             elif [ -n "${predefault}" ]
 157             then
 158                 fallbackdefault="${predefault}"
 159             else
 160                 fallbackdefault="0"
 161             fi
 162
 163             #NOT YET: See gdbarch.log for basic verification of
 164             # database
 165
 166             break
 167         fi
 168     done
 169     if [ -n "${class}" ]
 170     then
 171         true
 172     else
 173         false
 174     fi
 175 }
 176
 177
 178 fallback_default_p ()
 179 {
 180     [ -n "${postdefault}" -a "x${invalid_p}" != "x0" ] \
 181         || [ -n "${predefault}" -a "x${invalid_p}" = "x0" ]
 182 }
 183
 184 class_is_variable_p ()
 185 {
 186     case "${class}" in
 187         *v* | *V* ) true ;;
 188         * ) false ;;
 189     esac
 190 }
 191
 192 class_is_function_p ()
 193 {
 194     case "${class}" in
 195         *f* | *F* | *m* | *M* ) true ;;
 196         * ) false ;;
 197     esac
 198 }
 199
 200 class_is_multiarch_p ()
 201 {
 202     case "${class}" in
 203         *m* | *M* ) true ;;
 204         * ) false ;;
 205     esac
 206 }
 207
 208 class_is_predicate_p ()
 209 {
 210     case "${class}" in
 211         *F* | *V* | *M* ) true ;;
 212         * ) false ;;
 213     esac
 214 }
 215
 216 class_is_info_p ()
 217 {
 218     case "${class}" in
 219         *i* ) true ;;
 220         * ) false ;;
 221     esac
 222 }
 223
 224
 225 # dump out/verify the doco
 226 for field in ${read}
 227 do
 228   case ${field} in
 229
 230     class ) : ;;
 231
 232         # # -> line disable
 233         # f -> function
 234         #   hiding a function
 235         # F -> function + predicate
 236         #   hiding a function + predicate to test function validity
 237         # v -> variable
 238         #   hiding a variable
 239         # V -> variable + predicate
 240         #   hiding a variable + predicate to test variables validity
 241         # i -> set from info
 242         #   hiding something from the ``struct info'' object
 243         # m -> multi-arch function
 244         #   hiding a multi-arch function (parameterised with the architecture)
 245         # M -> multi-arch function + predicate
 246         #   hiding a multi-arch function + predicate to test function validity
 247
 248     macro ) : ;;
 249
 250         # The name of the legacy C macro by which this method can be
 251         # accessed.  If empty, no macro is defined.  If "=", a macro
 252         # formed from the upper-case function name is used.
 253
 254     returntype ) : ;;
 255
 256         # For functions, the return type; for variables, the data type
 257
 258     function ) : ;;
 259
 260         # For functions, the member function name; for variables, the
 261         # variable name.  Member function names are always prefixed with
 262         # ``gdbarch_'' for name-space purity.
 263
 264     formal ) : ;;
 265
 266         # The formal argument list.  It is assumed that the formal
 267         # argument list includes the actual name of each list element.
 268         # A function with no arguments shall have ``void'' as the
 269         # formal argument list.
 270
 271     actual ) : ;;
 272
 273         # The list of actual arguments.  The arguments specified shall
 274         # match the FORMAL list given above.  Functions with out
 275         # arguments leave this blank.
 276
 277     staticdefault ) : ;;
 278
 279         # To help with the GDB startup a static gdbarch object is
 280         # created.  STATICDEFAULT is the value to insert into that
 281         # static gdbarch object.  Since this a static object only
 282         # simple expressions can be used.
 283
 284         # If STATICDEFAULT is empty, zero is used.
 285
 286     predefault ) : ;;
 287
 288         # An initial value to assign to MEMBER of the freshly
 289         # malloc()ed gdbarch object.  After initialization, the
 290         # freshly malloc()ed object is passed to the target
 291         # architecture code for further updates.
 292
 293         # If PREDEFAULT is empty, zero is used.
 294
 295         # A non-empty PREDEFAULT, an empty POSTDEFAULT and a zero
 296         # INVALID_P are specified, PREDEFAULT will be used as the
 297         # default for the non- multi-arch target.
 298
 299         # A zero PREDEFAULT function will force the fallback to call
 300         # internal_error().
 301
 302         # Variable declarations can refer to ``gdbarch'' which will
 303         # contain the current architecture.  Care should be taken.
 304
 305     postdefault ) : ;;
 306
 307         # A value to assign to MEMBER of the new gdbarch object should
 308         # the target architecture code fail to change the PREDEFAULT
 309         # value.
 310
 311         # If POSTDEFAULT is empty, no post update is performed.
 312
 313         # If both INVALID_P and POSTDEFAULT are non-empty then
 314         # INVALID_P will be used to determine if MEMBER should be
 315         # changed to POSTDEFAULT.
 316
 317         # If a non-empty POSTDEFAULT and a zero INVALID_P are
 318         # specified, POSTDEFAULT will be used as the default for the
 319         # non- multi-arch target (regardless of the value of
 320         # PREDEFAULT).
 321
 322         # You cannot specify both a zero INVALID_P and a POSTDEFAULT.
 323
 324         # Variable declarations can refer to ``current_gdbarch'' which
 325         # will contain the current architecture.  Care should be
 326         # taken.
 327
 328     invalid_p ) : ;;
 329
 330         # A predicate equation that validates MEMBER.  Non-zero is
 331         # returned if the code creating the new architecture failed to
 332         # initialize MEMBER or the initialized the member is invalid.
 333         # If POSTDEFAULT is non-empty then MEMBER will be updated to
 334         # that value.  If POSTDEFAULT is empty then internal_error()
 335         # is called.
 336
 337         # If INVALID_P is empty, a check that MEMBER is no longer
 338         # equal to PREDEFAULT is used.
 339
 340         # The expression ``0'' disables the INVALID_P check making
 341         # PREDEFAULT a legitimate value.
 342
 343         # See also PREDEFAULT and POSTDEFAULT.
 344
 345     print ) : ;;
 346
 347         # An optional expression that convers MEMBER to a value
 348         # suitable for formatting using %s.
 349
 350         # If PRINT is empty, paddr_nz (for CORE_ADDR) or paddr_d
 351         # (anything else) is used.
 352
 353     garbage_at_eol ) : ;;
 354
 355         # Catches stray fields.
 356
 357     *)
 358         echo "Bad field ${field}"
 359         exit 1;;
 360   esac
 361 done
 362
 363
 364 function_list ()
 365 {
 366   # See below (DOCO) for description of each field
 367   cat <<EOF
 368 i::const struct bfd_arch_info *:bfd_arch_info:::&bfd_default_arch_struct::::gdbarch_bfd_arch_info (current_gdbarch)->printable_name
 369 #
 370 i::int:byte_order:::BFD_ENDIAN_BIG
 371 #
 372 i::enum gdb_osabi:osabi:::GDB_OSABI_UNKNOWN
 373 #
 374 i::const struct target_desc *:target_desc:::::::paddr_d ((long) current_gdbarch->target_desc)
 375 # Number of bits in a char or unsigned char for the target machine.
 376 # Just like CHAR_BIT in <limits.h> but describes the target machine.
 377 # v:TARGET_CHAR_BIT:int:char_bit::::8 * sizeof (char):8::0:
 378 #
 379 # Number of bits in a short or unsigned short for the target machine.
 380 v::int:short_bit:::8 * sizeof (short):2*TARGET_CHAR_BIT::0
 381 # Number of bits in an int or unsigned int for the target machine.
 382 v::int:int_bit:::8 * sizeof (int):4*TARGET_CHAR_BIT::0
 383 # Number of bits in a long or unsigned long for the target machine.
 384 v::int:long_bit:::8 * sizeof (long):4*TARGET_CHAR_BIT::0
 385 # Number of bits in a long long or unsigned long long for the target
 386 # machine.
 387 v::int:long_long_bit:::8 * sizeof (LONGEST):2*current_gdbarch->long_bit::0
 388
 389 # The ABI default bit-size and format for "float", "double", and "long
 390 # double".  These bit/format pairs should eventually be combined into
 391 # a single object.  For the moment, just initialize them as a pair.
 392 # Each format describes both the big and little endian layouts (if
 393 # useful).
 394
 395 v::int:float_bit:::8 * sizeof (float):4*TARGET_CHAR_BIT::0
 396 v::const struct floatformat **:float_format:::::floatformats_ieee_single::pformat (current_gdbarch->float_format)
 397 v::int:double_bit:::8 * sizeof (double):8*TARGET_CHAR_BIT::0
 398 v::const struct floatformat **:double_format:::::floatformats_ieee_double::pformat (current_gdbarch->double_format)
 399 v::int:long_double_bit:::8 * sizeof (long double):8*TARGET_CHAR_BIT::0
 400 v::const struct floatformat **:long_double_format:::::floatformats_ieee_double::pformat (current_gdbarch->long_double_format)
 401
 402 # For most targets, a pointer on the target and its representation as an
 403 # address in GDB have the same size and "look the same".  For such a
 404 # target, you need only set gdbarch_ptr_bit and gdbarch_addr_bit
 405 # / addr_bit will be set from it.
 406 #
 407 # If gdbarch_ptr_bit and gdbarch_addr_bit are different, you'll probably
 408 # also need to set gdbarch_pointer_to_address and gdbarch_address_to_pointer
 409 # as well.
 410 #
 411 # ptr_bit is the size of a pointer on the target
 412 v::int:ptr_bit:::8 * sizeof (void*):current_gdbarch->int_bit::0
 413 # addr_bit is the size of a target address as represented in gdb
 414 v::int:addr_bit:::8 * sizeof (void*):0:gdbarch_ptr_bit (current_gdbarch):
 415 #
 416 # One if \`char' acts like \`signed char', zero if \`unsigned char'.
 417 v::int:char_signed:::1:-1:1
 418 #
 419 F::CORE_ADDR:read_pc:struct regcache *regcache:regcache
 420 F::void:write_pc:struct regcache *regcache, CORE_ADDR val:regcache, val
 421 # Function for getting target's idea of a frame pointer.  FIXME: GDB's
 422 # whole scheme for dealing with "frames" and "frame pointers" needs a
 423 # serious shakedown.
 424 f::void:virtual_frame_pointer:CORE_ADDR pc, int *frame_regnum, LONGEST *frame_offset:pc, frame_regnum, frame_offset:0:legacy_virtual_frame_pointer::0
 425 #
 426 M::void:pseudo_register_read:struct regcache *regcache, int cookednum, gdb_byte *buf:regcache, cookednum, buf
 427 M::void:pseudo_register_write:struct regcache *regcache, int cookednum, const gdb_byte *buf:regcache, cookednum, buf
 428 #
 429 v::int:num_regs:::0:-1
 430 # This macro gives the number of pseudo-registers that live in the
 431 # register namespace but do not get fetched or stored on the target.
 432 # These pseudo-registers may be aliases for other registers,
 433 # combinations of other registers, or they may be computed by GDB.
 434 v::int:num_pseudo_regs:::0:0::0
 435
 436 # GDB's standard (or well known) register numbers.  These can map onto
 437 # a real register or a pseudo (computed) register or not be defined at
 438 # all (-1).
 439 # gdbarch_sp_regnum will hopefully be replaced by UNWIND_SP.
 440 v::int:sp_regnum:::-1:-1::0
 441 v::int:pc_regnum:::-1:-1::0
 442 v::int:ps_regnum:::-1:-1::0
 443 v::int:fp0_regnum:::0:-1::0
 444 # Convert stab register number (from \`r\' declaration) to a gdb REGNUM.
 445 f::int:stab_reg_to_regnum:int stab_regnr:stab_regnr::no_op_reg_to_regnum::0
 446 # Provide a default mapping from a ecoff register number to a gdb REGNUM.
 447 f::int:ecoff_reg_to_regnum:int ecoff_regnr:ecoff_regnr::no_op_reg_to_regnum::0
 448 # Provide a default mapping from a DWARF register number to a gdb REGNUM.
 449 f::int:dwarf_reg_to_regnum:int dwarf_regnr:dwarf_regnr::no_op_reg_to_regnum::0
 450 # Convert from an sdb register number to an internal gdb register number.
 451 f::int:sdb_reg_to_regnum:int sdb_regnr:sdb_regnr::no_op_reg_to_regnum::0
 452 f::int:dwarf2_reg_to_regnum:int dwarf2_regnr:dwarf2_regnr::no_op_reg_to_regnum::0
 453 f::const char *:register_name:int regnr:regnr
 454
 455 # Return the type of a register specified by the architecture.  Only
 456 # the register cache should call this function directly; others should
 457 # use "register_type".
 458 M::struct type *:register_type:int reg_nr:reg_nr
 459
 460 # See gdbint.texinfo, and PUSH_DUMMY_CALL.
 461 M::struct frame_id:unwind_dummy_id:struct frame_info *info:info
 462 # Implement UNWIND_DUMMY_ID and PUSH_DUMMY_CALL, then delete
 463 # deprecated_fp_regnum.
 464 v::int:deprecated_fp_regnum:::-1:-1::0
 465
 466 # See gdbint.texinfo.  See infcall.c.
 467 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
 468 v::int:call_dummy_location::::AT_ENTRY_POINT::0
 469 M::CORE_ADDR:push_dummy_code:CORE_ADDR sp, CORE_ADDR funaddr, int using_gcc, struct value **args, int nargs, struct type *value_type, CORE_ADDR *real_pc, CORE_ADDR *bp_addr, struct regcache *regcache:sp, funaddr, using_gcc, args, nargs, value_type, real_pc, bp_addr, regcache
 470
 471 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
 472 M::void:print_float_info:struct ui_file *file, struct frame_info *frame, const char *args:file, frame, args
 473 M::void:print_vector_info:struct ui_file *file, struct frame_info *frame, const char *args:file, frame, args
 474 # MAP a GDB RAW register number onto a simulator register number.  See
 475 # also include/...-sim.h.
 476 f::int:register_sim_regno:int reg_nr:reg_nr::legacy_register_sim_regno::0
 477 f::int:cannot_fetch_register:int regnum:regnum::cannot_register_not::0
 478 f::int:cannot_store_register:int regnum:regnum::cannot_register_not::0
 479 # setjmp/longjmp support.
 480 F::int:get_longjmp_target:struct frame_info *frame, CORE_ADDR *pc:frame, pc
 481 #
 482 v::int:believe_pcc_promotion:::::::
 483 #
 484 f::int:convert_register_p:int regnum, struct type *type:regnum, type:0:generic_convert_register_p::0
 485 f::void:register_to_value:struct frame_info *frame, int regnum, struct type *type, gdb_byte *buf:frame, regnum, type, buf:0
 486 f::void:value_to_register:struct frame_info *frame, int regnum, struct type *type, const gdb_byte *buf:frame, regnum, type, buf:0
 487 # Construct a value representing the contents of register REGNUM in
 488 # frame FRAME, interpreted as type TYPE.  The routine needs to
 489 # allocate and return a struct value with all value attributes
 490 # (but not the value contents) filled in.
 491 f::struct value *:value_from_register:struct type *type, int regnum, struct frame_info *frame:type, regnum, frame::default_value_from_register::0
 492 #
 493 f::CORE_ADDR:pointer_to_address:struct type *type, const gdb_byte *buf:type, buf::unsigned_pointer_to_address::0
 494 f::void:address_to_pointer:struct type *type, gdb_byte *buf, CORE_ADDR addr:type, buf, addr::unsigned_address_to_pointer::0
 495 M::CORE_ADDR:integer_to_address:struct type *type, const gdb_byte *buf:type, buf
 496
 497 # It has been suggested that this, well actually its predecessor,
 498 # should take the type/value of the function to be called and not the
 499 # return type.  This is left as an exercise for the reader.
 500
 501 # NOTE: cagney/2004-06-13: The function stack.c:return_command uses
 502 # the predicate with default hack to avoid calling store_return_value
 503 # (via legacy_return_value), when a small struct is involved.
 504
 505 M::enum return_value_convention:return_value:struct type *valtype, struct regcache *regcache, gdb_byte *readbuf, const gdb_byte *writebuf:valtype, regcache, readbuf, writebuf::legacy_return_value
 506
 507 # The deprecated methods extract_return_value, store_return_value,
 508 # DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS and
 509 # deprecated_use_struct_convention have all been folded into
 510 # RETURN_VALUE.
 511
 512 f::void:extract_return_value:struct type *type, struct regcache *regcache, gdb_byte *valbuf:type, regcache, valbuf:0
 513 f::void:store_return_value:struct type *type, struct regcache *regcache, const gdb_byte *valbuf:type, regcache, valbuf:0
 514 f::int:deprecated_use_struct_convention:int gcc_p, struct type *value_type:gcc_p, value_type::generic_use_struct_convention::0
 515
 516 f::CORE_ADDR:skip_prologue:CORE_ADDR ip:ip:0:0
 517 f::int:inner_than:CORE_ADDR lhs, CORE_ADDR rhs:lhs, rhs:0:0
 518 f::const gdb_byte *:breakpoint_from_pc:CORE_ADDR *pcptr, int *lenptr:pcptr, lenptr::0:
 519 M::CORE_ADDR:adjust_breakpoint_address:CORE_ADDR bpaddr:bpaddr
 520 f::int:memory_insert_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_insert_breakpoint::0
 521 f::int:memory_remove_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_remove_breakpoint::0
 522 v::CORE_ADDR:decr_pc_after_break:::0:::0
 523
 524 # A function can be addressed by either it's "pointer" (possibly a
 525 # descriptor address) or "entry point" (first executable instruction).
 526 # The method "convert_from_func_ptr_addr" converting the former to the
 527 # latter.  gdbarch_deprecated_function_start_offset is being used to implement
 528 # a simplified subset of that functionality - the function's address
 529 # corresponds to the "function pointer" and the function's start
 530 # corresponds to the "function entry point" - and hence is redundant.
 531
 532 v::CORE_ADDR:deprecated_function_start_offset:::0:::0
 533
 534 # Return the remote protocol register number associated with this
 535 # register.  Normally the identity mapping.
 536 m::int:remote_register_number:int regno:regno::default_remote_register_number::0
 537
 538 # Fetch the target specific address used to represent a load module.
 539 F::CORE_ADDR:fetch_tls_load_module_address:struct objfile *objfile:objfile
 540 #
 541 v::CORE_ADDR:frame_args_skip:::0:::0
 542 M::CORE_ADDR:unwind_pc:struct frame_info *next_frame:next_frame
 543 M::CORE_ADDR:unwind_sp:struct frame_info *next_frame:next_frame
 544 # DEPRECATED_FRAME_LOCALS_ADDRESS as been replaced by the per-frame
 545 # frame-base.  Enable frame-base before frame-unwind.
 546 F::int:frame_num_args:struct frame_info *frame:frame
 547 #
 548 M::CORE_ADDR:frame_align:CORE_ADDR address:address
 549 # deprecated_reg_struct_has_addr has been replaced by
 550 # stabs_argument_has_addr.
 551 F::int:deprecated_reg_struct_has_addr:int gcc_p, struct type *type:gcc_p, type
 552 m::int:stabs_argument_has_addr:struct type *type:type::default_stabs_argument_has_addr::0
 553 v::int:frame_red_zone_size
 554 #
 555 m::CORE_ADDR:convert_from_func_ptr_addr:CORE_ADDR addr, struct target_ops *targ:addr, targ::convert_from_func_ptr_addr_identity::0
 556 # On some machines there are bits in addresses which are not really
 557 # part of the address, but are used by the kernel, the hardware, etc.
 558 # for special purposes.  gdbarch_addr_bits_remove takes out any such bits so
 559 # we get a "real" address such as one would find in a symbol table.
 560 # This is used only for addresses of instructions, and even then I'm
 561 # not sure it's used in all contexts.  It exists to deal with there
 562 # being a few stray bits in the PC which would mislead us, not as some
 563 # sort of generic thing to handle alignment or segmentation (it's
 564 # possible it should be in TARGET_READ_PC instead).
 565 f::CORE_ADDR:addr_bits_remove:CORE_ADDR addr:addr::core_addr_identity::0
 566 # It is not at all clear why gdbarch_smash_text_address is not folded into
 567 # gdbarch_addr_bits_remove.
 568 f::CORE_ADDR:smash_text_address:CORE_ADDR addr:addr::core_addr_identity::0
 569
 570 # FIXME/cagney/2001-01-18: This should be split in two.  A target method that
 571 # indicates if the target needs software single step.  An ISA method to
 572 # implement it.
 573 #
 574 # FIXME/cagney/2001-01-18: This should be replaced with something that inserts
 575 # breakpoints using the breakpoint system instead of blatting memory directly
 576 # (as with rs6000).
 577 #
 578 # FIXME/cagney/2001-01-18: The logic is backwards.  It should be asking if the
 579 # target can single step.  If not, then implement single step using breakpoints.
 580 #
 581 # A return value of 1 means that the software_single_step breakpoints
 582 # were inserted; 0 means they were not.
 583 F::int:software_single_step:struct frame_info *frame:frame
 584
 585 # Return non-zero if the processor is executing a delay slot and a
 586 # further single-step is needed before the instruction finishes.
 587 M::int:single_step_through_delay:struct frame_info *frame:frame
 588 # FIXME: cagney/2003-08-28: Need to find a better way of selecting the
 589 # disassembler.  Perhaps objdump can handle it?
 590 f::int:print_insn:bfd_vma vma, struct disassemble_info *info:vma, info::0:
 591 f::CORE_ADDR:skip_trampoline_code:struct frame_info *frame, CORE_ADDR pc:frame, pc::generic_skip_trampoline_code::0
 592
 593
 594 # If IN_SOLIB_DYNSYM_RESOLVE_CODE returns true, and SKIP_SOLIB_RESOLVER
 595 # evaluates non-zero, this is the address where the debugger will place
 596 # a step-resume breakpoint to get us past the dynamic linker.
 597 m::CORE_ADDR:skip_solib_resolver:CORE_ADDR pc:pc::generic_skip_solib_resolver::0
 598 # Some systems also have trampoline code for returning from shared libs.
 599 f::int:in_solib_return_trampoline:CORE_ADDR pc, char *name:pc, name::generic_in_solib_return_trampoline::0
 600
 601 # A target might have problems with watchpoints as soon as the stack
 602 # frame of the current function has been destroyed.  This mostly happens
 603 # as the first action in a funtion's epilogue.  in_function_epilogue_p()
 604 # is defined to return a non-zero value if either the given addr is one
 605 # instruction after the stack destroying instruction up to the trailing
 606 # return instruction or if we can figure out that the stack frame has
 607 # already been invalidated regardless of the value of addr.  Targets
 608 # which don't suffer from that problem could just let this functionality
 609 # untouched.
 610 m::int:in_function_epilogue_p:CORE_ADDR addr:addr:0:generic_in_function_epilogue_p::0
 611 # Given a vector of command-line arguments, return a newly allocated
 612 # string which, when passed to the create_inferior function, will be
 613 # parsed (on Unix systems, by the shell) to yield the same vector.
 614 # This function should call error() if the argument vector is not
 615 # representable for this target or if this target does not support
 616 # command-line arguments.
 617 # ARGC is the number of elements in the vector.
 618 # ARGV is an array of strings, one per argument.
 619 m::char *:construct_inferior_arguments:int argc, char **argv:argc, argv::construct_inferior_arguments::0
 620 f::void:elf_make_msymbol_special:asymbol *sym, struct minimal_symbol *msym:sym, msym::default_elf_make_msymbol_special::0
 621 f::void:coff_make_msymbol_special:int val, struct minimal_symbol *msym:val, msym::default_coff_make_msymbol_special::0
 622 v::const char *:name_of_malloc:::"malloc":"malloc"::0:current_gdbarch->name_of_malloc
 623 v::int:cannot_step_breakpoint:::0:0::0
 624 v::int:have_nonsteppable_watchpoint:::0:0::0
 625 F::int:address_class_type_flags:int byte_size, int dwarf2_addr_class:byte_size, dwarf2_addr_class
 626 M::const char *:address_class_type_flags_to_name:int type_flags:type_flags
 627 M::int:address_class_name_to_type_flags:const char *name, int *type_flags_ptr:name, type_flags_ptr
 628 # Is a register in a group
 629 m::int:register_reggroup_p:int regnum, struct reggroup *reggroup:regnum, reggroup::default_register_reggroup_p::0
 630 # Fetch the pointer to the ith function argument.
 631 F::CORE_ADDR:fetch_pointer_argument:struct frame_info *frame, int argi, struct type *type:frame, argi, type
 632
 633 # Return the appropriate register set for a core file section with
 634 # name SECT_NAME and size SECT_SIZE.
 635 M::const struct regset *:regset_from_core_section:const char *sect_name, size_t sect_size:sect_name, sect_size
 636
 637 # If the elements of C++ vtables are in-place function descriptors rather
 638 # than normal function pointers (which may point to code or a descriptor),
 639 # set this to one.
 640 v::int:vtable_function_descriptors:::0:0::0
 641
 642 # Set if the least significant bit of the delta is used instead of the least
 643 # significant bit of the pfn for pointers to virtual member functions.
 644 v::int:vbit_in_delta:::0:0::0
 645
 646 # Advance PC to next instruction in order to skip a permanent breakpoint.
 647 F::void:skip_permanent_breakpoint:struct regcache *regcache:regcache
 648
 649 # Refresh overlay mapped state for section OSECT.
 650 F::void:overlay_update:struct obj_section *osect:osect
 651 EOF
 652 }
 653
 654 #
 655 # The .log file
 656 #
 657 exec > new-gdbarch.log
 658 function_list | while do_read
 659 do
 660     cat <<EOF
 661 ${class} ${returntype} ${function} ($formal)
 662 EOF
 663     for r in ${read}
 664     do
 665         eval echo \"\ \ \ \ ${r}=\${${r}}\"
 666     done
 667     if class_is_predicate_p && fallback_default_p
 668     then
 669         echo "Error: predicate function ${function} can not have a non- multi-arch default" 1>&2
 670         kill $$
 671         exit 1
 672     fi
 673     if [ "x${invalid_p}" = "x0" -a -n "${postdefault}" ]
 674     then
 675         echo "Error: postdefault is useless when invalid_p=0" 1>&2
 676         kill $$
 677         exit 1
 678     fi
 679     if class_is_multiarch_p
 680     then
 681         if class_is_predicate_p ; then :
 682         elif test "x${predefault}" = "x"
 683         then
 684             echo "Error: pure multi-arch function ${function} must have a predefault" 1>&2
 685             kill $$
 686             exit 1
 687         fi
 688     fi
 689     echo ""
 690 done
 691
 692 exec 1>&2
 693 compare_new gdbarch.log
 694
 695
 696 copyright ()
 697 {
 698 cat <<EOF
 699 /* *INDENT-OFF* */ /* THIS FILE IS GENERATED */
 700
 701 /* Dynamic architecture support for GDB, the GNU debugger.
 702
 703    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
 704    Free Software Foundation, Inc.
 705
 706    This file is part of GDB.
 707
 708    This program is free software; you can redistribute it and/or modify
 709    it under the terms of the GNU General Public License as published by
 710    the Free Software Foundation; either version 3 of the License, or
 711    (at your option) any later version.
 712
 713    This program is distributed in the hope that it will be useful,
 714    but WITHOUT ANY WARRANTY; without even the implied warranty of
 715    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 716    GNU General Public License for more details.
 717
 718    You should have received a copy of the GNU General Public License
 719    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 720
 721 /* This file was created with the aid of \`\`gdbarch.sh''.
 722
 723    The Bourne shell script \`\`gdbarch.sh'' creates the files
 724    \`\`new-gdbarch.c'' and \`\`new-gdbarch.h and then compares them
 725    against the existing \`\`gdbarch.[hc]''.  Any differences found
 726    being reported.
 727
 728    If editing this file, please also run gdbarch.sh and merge any
 729    changes into that script. Conversely, when making sweeping changes
 730    to this file, modifying gdbarch.sh and using its output may prove
 731    easier. */
 732
 733 EOF
 734 }
 735
 736 #
 737 # The .h file
 738 #
 739
 740 exec > new-gdbarch.h
 741 copyright
 742 cat <<EOF
 743 #ifndef GDBARCH_H
 744 #define GDBARCH_H
 745
 746 struct floatformat;
 747 struct ui_file;
 748 struct frame_info;
 749 struct value;
 750 struct objfile;
 751 struct obj_section;
 752 struct minimal_symbol;
 753 struct regcache;
 754 struct reggroup;
 755 struct regset;
 756 struct disassemble_info;
 757 struct target_ops;
 758 struct obstack;
 759 struct bp_target_info;
 760 struct target_desc;
 761
 762 extern struct gdbarch *current_gdbarch;
 763 EOF
 764
 765 # function typedef's
 766 printf "\n"
 767 printf "\n"
 768 printf "/* The following are pre-initialized by GDBARCH. */\n"
 769 function_list | while do_read
 770 do
 771     if class_is_info_p
 772     then
 773         printf "\n"
 774         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 775         printf "/* set_gdbarch_${function}() - not applicable - pre-initialized. */\n"
 776         if test -n "${macro}"
 777         then
 778             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 779             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 780             printf "#endif\n"
 781             printf "#if !defined (${macro})\n"
 782             printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 783             printf "#endif\n"
 784         fi
 785     fi
 786 done
 787
 788 # function typedef's
 789 printf "\n"
 790 printf "\n"
 791 printf "/* The following are initialized by the target dependent code. */\n"
 792 function_list | while do_read
 793 do
 794     if [ -n "${comment}" ]
 795     then
 796         echo "${comment}" | sed \
 797             -e '2 s,#,/*,' \
 798             -e '3,$ s,#,  ,' \
 799             -e '$ s,$, */,'
 800     fi
 801
 802     if class_is_predicate_p
 803     then
 804         if test -n "${macro}"
 805         then
 806             printf "\n"
 807             printf "#if defined (${macro})\n"
 808             printf "/* Legacy for systems yet to multi-arch ${macro} */\n"
 809             printf "#if !defined (${macro}_P)\n"
 810             printf "#define ${macro}_P() (1)\n"
 811             printf "#endif\n"
 812             printf "#endif\n"
 813         fi
 814         printf "\n"
 815         printf "extern int gdbarch_${function}_p (struct gdbarch *gdbarch);\n"
 816         if test -n "${macro}"
 817         then
 818             printf "#if !defined (GDB_TM_FILE) && defined (${macro}_P)\n"
 819             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 820             printf "#endif\n"
 821             printf "#if !defined (${macro}_P)\n"
 822             printf "#define ${macro}_P() (gdbarch_${function}_p (current_gdbarch))\n"
 823             printf "#endif\n"
 824         fi
 825     fi
 826     if class_is_variable_p
 827     then
 828         printf "\n"
 829         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 830         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, ${returntype} ${function});\n"
 831         if test -n "${macro}"
 832         then
 833             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 834             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 835             printf "#endif\n"
 836             printf "#if !defined (${macro})\n"
 837             printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 838             printf "#endif\n"
 839         fi
 840     fi
 841     if class_is_function_p
 842     then
 843         printf "\n"
 844         if [ "x${formal}" = "xvoid" ] && class_is_multiarch_p
 845         then
 846             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch);\n"
 847         elif class_is_multiarch_p
 848         then
 849             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch, ${formal});\n"
 850         else
 851             printf "typedef ${returntype} (gdbarch_${function}_ftype) (${formal});\n"
 852         fi
 853         if [ "x${formal}" = "xvoid" ]
 854         then
 855           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 856         else
 857           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch, ${formal});\n"
 858         fi
 859         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, gdbarch_${function}_ftype *${function});\n"
 860         if test -n "${macro}"
 861         then
 862             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 863             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 864             printf "#endif\n"
 865             if [ "x${actual}" = "x" ]
 866             then
 867                 d="#define ${macro}() (gdbarch_${function} (current_gdbarch))"
 868             elif [ "x${actual}" = "x-" ]
 869             then
 870                 d="#define ${macro} (gdbarch_${function} (current_gdbarch))"
 871             else
 872                 d="#define ${macro}(${actual}) (gdbarch_${function} (current_gdbarch, ${actual}))"
 873             fi
 874             printf "#if !defined (${macro})\n"
 875             if [ "x${actual}" = "x" ]
 876             then
 877                 printf "#define ${macro}() (gdbarch_${function} (current_gdbarch))\n"
 878             elif [ "x${actual}" = "x-" ]
 879             then
 880                 printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 881             else
 882                 printf "#define ${macro}(${actual}) (gdbarch_${function} (current_gdbarch, ${actual}))\n"
 883             fi
 884             printf "#endif\n"
 885         fi
 886     fi
 887 done
 888
 889 # close it off
 890 cat <<EOF
 891
 892 extern struct gdbarch_tdep *gdbarch_tdep (struct gdbarch *gdbarch);
 893
 894
 895 /* Mechanism for co-ordinating the selection of a specific
 896    architecture.
 897
 898    GDB targets (*-tdep.c) can register an interest in a specific
 899    architecture.  Other GDB components can register a need to maintain
 900    per-architecture data.
 901
 902    The mechanisms below ensures that there is only a loose connection
 903    between the set-architecture command and the various GDB
 904    components.  Each component can independently register their need
 905    to maintain architecture specific data with gdbarch.
 906
 907    Pragmatics:
 908
 909    Previously, a single TARGET_ARCHITECTURE_HOOK was provided.  It
 910    didn't scale.
 911
 912    The more traditional mega-struct containing architecture specific
 913    data for all the various GDB components was also considered.  Since
 914    GDB is built from a variable number of (fairly independent)
 915    components it was determined that the global aproach was not
 916    applicable. */
 917
 918
 919 /* Register a new architectural family with GDB.
 920
 921    Register support for the specified ARCHITECTURE with GDB.  When
 922    gdbarch determines that the specified architecture has been
 923    selected, the corresponding INIT function is called.
 924
 925    --
 926
 927    The INIT function takes two parameters: INFO which contains the
 928    information available to gdbarch about the (possibly new)
 929    architecture; ARCHES which is a list of the previously created
 930    \`\`struct gdbarch'' for this architecture.
 931
 932    The INFO parameter is, as far as possible, be pre-initialized with
 933    information obtained from INFO.ABFD or the global defaults.
 934
 935    The ARCHES parameter is a linked list (sorted most recently used)
 936    of all the previously created architures for this architecture
 937    family.  The (possibly NULL) ARCHES->gdbarch can used to access
 938    values from the previously selected architecture for this
 939    architecture family.  The global \`\`current_gdbarch'' shall not be
 940    used.
 941
 942    The INIT function shall return any of: NULL - indicating that it
 943    doesn't recognize the selected architecture; an existing \`\`struct
 944    gdbarch'' from the ARCHES list - indicating that the new
 945    architecture is just a synonym for an earlier architecture (see
 946    gdbarch_list_lookup_by_info()); a newly created \`\`struct gdbarch''
 947    - that describes the selected architecture (see gdbarch_alloc()).
 948
 949    The DUMP_TDEP function shall print out all target specific values.
 950    Care should be taken to ensure that the function works in both the
 951    multi-arch and non- multi-arch cases. */
 952
 953 struct gdbarch_list
 954 {
 955   struct gdbarch *gdbarch;
 956   struct gdbarch_list *next;
 957 };
 958
 959 struct gdbarch_info
 960 {
 961   /* Use default: NULL (ZERO). */
 962   const struct bfd_arch_info *bfd_arch_info;
 963
 964   /* Use default: BFD_ENDIAN_UNKNOWN (NB: is not ZERO).  */
 965   int byte_order;
 966
 967   /* Use default: NULL (ZERO). */
 968   bfd *abfd;
 969
 970   /* Use default: NULL (ZERO). */
 971   struct gdbarch_tdep_info *tdep_info;
 972
 973   /* Use default: GDB_OSABI_UNINITIALIZED (-1).  */
 974   enum gdb_osabi osabi;
 975
 976   /* Use default: NULL (ZERO).  */
 977   const struct target_desc *target_desc;
 978 };
 979
 980 typedef struct gdbarch *(gdbarch_init_ftype) (struct gdbarch_info info, struct gdbarch_list *arches);
 981 typedef void (gdbarch_dump_tdep_ftype) (struct gdbarch *gdbarch, struct ui_file *file);
 982
 983 /* DEPRECATED - use gdbarch_register() */
 984 extern void register_gdbarch_init (enum bfd_architecture architecture, gdbarch_init_ftype *);
 985
 986 extern void gdbarch_register (enum bfd_architecture architecture,
 987                               gdbarch_init_ftype *,
 988                               gdbarch_dump_tdep_ftype *);
 989
 990
 991 /* Return a freshly allocated, NULL terminated, array of the valid
 992    architecture names.  Since architectures are registered during the
 993    _initialize phase this function only returns useful information
 994    once initialization has been completed. */
 995
 996 extern const char **gdbarch_printable_names (void);
 997
 998
 999 /* Helper function.  Search the list of ARCHES for a GDBARCH that
1000    matches the information provided by INFO. */
1001
1002 extern struct gdbarch_list *gdbarch_list_lookup_by_info (struct gdbarch_list *arches, const struct gdbarch_info *info);
1003
1004
1005 /* Helper function.  Create a preliminary \`\`struct gdbarch''.  Perform
1006    basic initialization using values obtained from the INFO and TDEP
1007    parameters.  set_gdbarch_*() functions are called to complete the
1008    initialization of the object. */
1009
1010 extern struct gdbarch *gdbarch_alloc (const struct gdbarch_info *info, struct gdbarch_tdep *tdep);
1011
1012
1013 /* Helper function.  Free a partially-constructed \`\`struct gdbarch''.
1014    It is assumed that the caller freeds the \`\`struct
1015    gdbarch_tdep''. */
1016
1017 extern void gdbarch_free (struct gdbarch *);
1018
1019
1020 /* Helper function.  Allocate memory from the \`\`struct gdbarch''
1021    obstack.  The memory is freed when the corresponding architecture
1022    is also freed.  */
1023
1024 extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
1025 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
1026 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
1027
1028
1029 /* Helper function. Force an update of the current architecture.
1030
1031    The actual architecture selected is determined by INFO, \`\`(gdb) set
1032    architecture'' et.al., the existing architecture and BFD's default
1033    architecture.  INFO should be initialized to zero and then selected
1034    fields should be updated.
1035
1036    Returns non-zero if the update succeeds */
1037
1038 extern int gdbarch_update_p (struct gdbarch_info info);
1039
1040
1041 /* Helper function.  Find an architecture matching info.
1042
1043    INFO should be initialized using gdbarch_info_init, relevant fields
1044    set, and then finished using gdbarch_info_fill.
1045
1046    Returns the corresponding architecture, or NULL if no matching
1047    architecture was found.  "current_gdbarch" is not updated.  */
1048
1049 extern struct gdbarch *gdbarch_find_by_info (struct gdbarch_info info);
1050
1051
1052 /* Helper function.  Set the global "current_gdbarch" to "gdbarch".
1053
1054    FIXME: kettenis/20031124: Of the functions that follow, only
1055    gdbarch_from_bfd is supposed to survive.  The others will
1056    dissappear since in the future GDB will (hopefully) be truly
1057    multi-arch.  However, for now we're still stuck with the concept of
1058    a single active architecture.  */
1059
1060 extern void deprecated_current_gdbarch_select_hack (struct gdbarch *gdbarch);
1061
1062
1063 /* Register per-architecture data-pointer.
1064
1065    Reserve space for a per-architecture data-pointer.  An identifier
1066    for the reserved data-pointer is returned.  That identifer should
1067    be saved in a local static variable.
1068
1069    Memory for the per-architecture data shall be allocated using
1070    gdbarch_obstack_zalloc.  That memory will be deleted when the
1071    corresponding architecture object is deleted.
1072
1073    When a previously created architecture is re-selected, the
1074    per-architecture data-pointer for that previous architecture is
1075    restored.  INIT() is not re-called.
1076
1077    Multiple registrarants for any architecture are allowed (and
1078    strongly encouraged).  */
1079
1080 struct gdbarch_data;
1081
1082 typedef void *(gdbarch_data_pre_init_ftype) (struct obstack *obstack);
1083 extern struct gdbarch_data *gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *init);
1084 typedef void *(gdbarch_data_post_init_ftype) (struct gdbarch *gdbarch);
1085 extern struct gdbarch_data *gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *init);
1086 extern void deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1087                                          struct gdbarch_data *data,
1088                                          void *pointer);
1089
1090 extern void *gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *);
1091
1092
1093 /* Set the dynamic target-system-dependent parameters (architecture,
1094    byte-order, ...) using information found in the BFD */
1095
1096 extern void set_gdbarch_from_file (bfd *);
1097
1098
1099 /* Initialize the current architecture to the "first" one we find on
1100    our list.  */
1101
1102 extern void initialize_current_architecture (void);
1103
1104 /* gdbarch trace variable */
1105 extern int gdbarch_debug;
1106
1107 extern void gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file);
1108
1109 #endif
1110 EOF
1111 exec 1>&2
1112 #../move-if-change new-gdbarch.h gdbarch.h
1113 compare_new gdbarch.h
1114
1115
1116 #
1117 # C file
1118 #
1119
1120 exec > new-gdbarch.c
1121 copyright
1122 cat <<EOF
1123
1124 #include "defs.h"
1125 #include "arch-utils.h"
1126
1127 #include "gdbcmd.h"
1128 #include "inferior.h"
1129 #include "symcat.h"
1130
1131 #include "floatformat.h"
1132
1133 #include "gdb_assert.h"
1134 #include "gdb_string.h"
1135 #include "gdb-events.h"
1136 #include "reggroups.h"
1137 #include "osabi.h"
1138 #include "gdb_obstack.h"
1139
1140 /* Static function declarations */
1141
1142 static void alloc_gdbarch_data (struct gdbarch *);
1143
1144 /* Non-zero if we want to trace architecture code.  */
1145
1146 #ifndef GDBARCH_DEBUG
1147 #define GDBARCH_DEBUG 0
1148 #endif
1149 int gdbarch_debug = GDBARCH_DEBUG;
1150 static void
1151 show_gdbarch_debug (struct ui_file *file, int from_tty,
1152                     struct cmd_list_element *c, const char *value)
1153 {
1154   fprintf_filtered (file, _("Architecture debugging is %s.\\n"), value);
1155 }
1156
1157 static const char *
1158 pformat (const struct floatformat **format)
1159 {
1160   if (format == NULL)
1161     return "(null)";
1162   else
1163     /* Just print out one of them - this is only for diagnostics.  */
1164     return format[0]->name;
1165 }
1166
1167 EOF
1168
1169 # gdbarch open the gdbarch object
1170 printf "\n"
1171 printf "/* Maintain the struct gdbarch object */\n"
1172 printf "\n"
1173 printf "struct gdbarch\n"
1174 printf "{\n"
1175 printf "  /* Has this architecture been fully initialized?  */\n"
1176 printf "  int initialized_p;\n"
1177 printf "\n"
1178 printf "  /* An obstack bound to the lifetime of the architecture.  */\n"
1179 printf "  struct obstack *obstack;\n"
1180 printf "\n"
1181 printf "  /* basic architectural information */\n"
1182 function_list | while do_read
1183 do
1184     if class_is_info_p
1185     then
1186         printf "  ${returntype} ${function};\n"
1187     fi
1188 done
1189 printf "\n"
1190 printf "  /* target specific vector. */\n"
1191 printf "  struct gdbarch_tdep *tdep;\n"
1192 printf "  gdbarch_dump_tdep_ftype *dump_tdep;\n"
1193 printf "\n"
1194 printf "  /* per-architecture data-pointers */\n"
1195 printf "  unsigned nr_data;\n"
1196 printf "  void **data;\n"
1197 printf "\n"
1198 printf "  /* per-architecture swap-regions */\n"
1199 printf "  struct gdbarch_swap *swap;\n"
1200 printf "\n"
1201 cat <<EOF
1202   /* Multi-arch values.
1203
1204      When extending this structure you must:
1205
1206      Add the field below.
1207
1208      Declare set/get functions and define the corresponding
1209      macro in gdbarch.h.
1210
1211      gdbarch_alloc(): If zero/NULL is not a suitable default,
1212      initialize the new field.
1213
1214      verify_gdbarch(): Confirm that the target updated the field
1215      correctly.
1216
1217      gdbarch_dump(): Add a fprintf_unfiltered call so that the new
1218      field is dumped out
1219
1220      \`\`startup_gdbarch()'': Append an initial value to the static
1221      variable (base values on the host's c-type system).
1222
1223      get_gdbarch(): Implement the set/get functions (probably using
1224      the macro's as shortcuts).
1225
1226      */
1227
1228 EOF
1229 function_list | while do_read
1230 do
1231     if class_is_variable_p
1232     then
1233         printf "  ${returntype} ${function};\n"
1234     elif class_is_function_p
1235     then
1236         printf "  gdbarch_${function}_ftype *${function};\n"
1237     fi
1238 done
1239 printf "};\n"
1240
1241 # A pre-initialized vector
1242 printf "\n"
1243 printf "\n"
1244 cat <<EOF
1245 /* The default architecture uses host values (for want of a better
1246    choice). */
1247 EOF
1248 printf "\n"
1249 printf "extern const struct bfd_arch_info bfd_default_arch_struct;\n"
1250 printf "\n"
1251 printf "struct gdbarch startup_gdbarch =\n"
1252 printf "{\n"
1253 printf "  1, /* Always initialized.  */\n"
1254 printf "  NULL, /* The obstack.  */\n"
1255 printf "  /* basic architecture information */\n"
1256 function_list | while do_read
1257 do
1258     if class_is_info_p
1259     then
1260         printf "  ${staticdefault},  /* ${function} */\n"
1261     fi
1262 done
1263 cat <<EOF
1264   /* target specific vector and its dump routine */
1265   NULL, NULL,
1266   /*per-architecture data-pointers and swap regions */
1267   0, NULL, NULL,
1268   /* Multi-arch values */
1269 EOF
1270 function_list | while do_read
1271 do
1272     if class_is_function_p || class_is_variable_p
1273     then
1274         printf "  ${staticdefault},  /* ${function} */\n"
1275     fi
1276 done
1277 cat <<EOF
1278   /* startup_gdbarch() */
1279 };
1280
1281 struct gdbarch *current_gdbarch = &startup_gdbarch;
1282 EOF
1283
1284 # Create a new gdbarch struct
1285 cat <<EOF
1286
1287 /* Create a new \`\`struct gdbarch'' based on information provided by
1288    \`\`struct gdbarch_info''. */
1289 EOF
1290 printf "\n"
1291 cat <<EOF
1292 struct gdbarch *
1293 gdbarch_alloc (const struct gdbarch_info *info,
1294                struct gdbarch_tdep *tdep)
1295 {
1296   /* NOTE: The new architecture variable is named \`\`current_gdbarch''
1297      so that macros such as TARGET_ARCHITECTURE, when expanded, refer to
1298      the current local architecture and not the previous global
1299      architecture.  This ensures that the new architectures initial
1300      values are not influenced by the previous architecture.  Once
1301      everything is parameterised with gdbarch, this will go away.  */
1302   struct gdbarch *current_gdbarch;
1303
1304   /* Create an obstack for allocating all the per-architecture memory,
1305      then use that to allocate the architecture vector.  */
1306   struct obstack *obstack = XMALLOC (struct obstack);
1307   obstack_init (obstack);
1308   current_gdbarch = obstack_alloc (obstack, sizeof (*current_gdbarch));
1309   memset (current_gdbarch, 0, sizeof (*current_gdbarch));
1310   current_gdbarch->obstack = obstack;
1311
1312   alloc_gdbarch_data (current_gdbarch);
1313
1314   current_gdbarch->tdep = tdep;
1315 EOF
1316 printf "\n"
1317 function_list | while do_read
1318 do
1319     if class_is_info_p
1320     then
1321         printf "  current_gdbarch->${function} = info->${function};\n"
1322     fi
1323 done
1324 printf "\n"
1325 printf "  /* Force the explicit initialization of these. */\n"
1326 function_list | while do_read
1327 do
1328     if class_is_function_p || class_is_variable_p
1329     then
1330         if [ -n "${predefault}" -a "x${predefault}" != "x0" ]
1331         then
1332           printf "  current_gdbarch->${function} = ${predefault};\n"
1333         fi
1334     fi
1335 done
1336 cat <<EOF
1337   /* gdbarch_alloc() */
1338
1339   return current_gdbarch;
1340 }
1341 EOF
1342
1343 # Free a gdbarch struct.
1344 printf "\n"
1345 printf "\n"
1346 cat <<EOF
1347 /* Allocate extra space using the per-architecture obstack.  */
1348
1349 void *
1350 gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
1351 {
1352   void *data = obstack_alloc (arch->obstack, size);
1353   memset (data, 0, size);
1354   return data;
1355 }
1356
1357
1358 /* Free a gdbarch struct.  This should never happen in normal
1359    operation --- once you've created a gdbarch, you keep it around.
1360    However, if an architecture's init function encounters an error
1361    building the structure, it may need to clean up a partially
1362    constructed gdbarch.  */
1363
1364 void
1365 gdbarch_free (struct gdbarch *arch)
1366 {
1367   struct obstack *obstack;
1368   gdb_assert (arch != NULL);
1369   gdb_assert (!arch->initialized_p);
1370   obstack = arch->obstack;
1371   obstack_free (obstack, 0); /* Includes the ARCH.  */
1372   xfree (obstack);
1373 }
1374 EOF
1375
1376 # verify a new architecture
1377 cat <<EOF
1378
1379
1380 /* Ensure that all values in a GDBARCH are reasonable.  */
1381
1382 /* NOTE/WARNING: The parameter is called \`\`current_gdbarch'' so that it
1383    just happens to match the global variable \`\`current_gdbarch''.  That
1384    way macros refering to that variable get the local and not the global
1385    version - ulgh.  Once everything is parameterised with gdbarch, this
1386    will go away. */
1387
1388 static void
1389 verify_gdbarch (struct gdbarch *current_gdbarch)
1390 {
1391   struct ui_file *log;
1392   struct cleanup *cleanups;
1393   long dummy;
1394   char *buf;
1395   log = mem_fileopen ();
1396   cleanups = make_cleanup_ui_file_delete (log);
1397   /* fundamental */
1398   if (current_gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)
1399     fprintf_unfiltered (log, "\n\tbyte-order");
1400   if (current_gdbarch->bfd_arch_info == NULL)
1401     fprintf_unfiltered (log, "\n\tbfd_arch_info");
1402   /* Check those that need to be defined for the given multi-arch level. */
1403 EOF
1404 function_list | while do_read
1405 do
1406     if class_is_function_p || class_is_variable_p
1407     then
1408         if [ "x${invalid_p}" = "x0" ]
1409         then
1410             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1411         elif class_is_predicate_p
1412         then
1413             printf "  /* Skip verify of ${function}, has predicate */\n"
1414         # FIXME: See do_read for potential simplification
1415         elif [ -n "${invalid_p}" -a -n "${postdefault}" ]
1416         then
1417             printf "  if (${invalid_p})\n"
1418             printf "    current_gdbarch->${function} = ${postdefault};\n"
1419         elif [ -n "${predefault}" -a -n "${postdefault}" ]
1420         then
1421             printf "  if (current_gdbarch->${function} == ${predefault})\n"
1422             printf "    current_gdbarch->${function} = ${postdefault};\n"
1423         elif [ -n "${postdefault}" ]
1424         then
1425             printf "  if (current_gdbarch->${function} == 0)\n"
1426             printf "    current_gdbarch->${function} = ${postdefault};\n"
1427         elif [ -n "${invalid_p}" ]
1428         then
1429             printf "  if (${invalid_p})\n"
1430             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1431         elif [ -n "${predefault}" ]
1432         then
1433             printf "  if (current_gdbarch->${function} == ${predefault})\n"
1434             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1435         fi
1436     fi
1437 done
1438 cat <<EOF
1439   buf = ui_file_xstrdup (log, &dummy);
1440   make_cleanup (xfree, buf);
1441   if (strlen (buf) > 0)
1442     internal_error (__FILE__, __LINE__,
1443                     _("verify_gdbarch: the following are invalid ...%s"),
1444                     buf);
1445   do_cleanups (cleanups);
1446 }
1447 EOF
1448
1449 # dump the structure
1450 printf "\n"
1451 printf "\n"
1452 cat <<EOF
1453 /* Print out the details of the current architecture. */
1454
1455 /* NOTE/WARNING: The parameter is called \`\`current_gdbarch'' so that it
1456    just happens to match the global variable \`\`current_gdbarch''.  That
1457    way macros refering to that variable get the local and not the global
1458    version - ulgh.  Once everything is parameterised with gdbarch, this
1459    will go away. */
1460
1461 void
1462 gdbarch_dump (struct gdbarch *current_gdbarch, struct ui_file *file)
1463 {
1464   const char *gdb_xm_file = "<not-defined>";
1465   const char *gdb_nm_file = "<not-defined>";
1466   const char *gdb_tm_file = "<not-defined>";
1467 #if defined (GDB_XM_FILE)
1468   gdb_xm_file = GDB_XM_FILE;
1469 #endif
1470   fprintf_unfiltered (file,
1471                       "gdbarch_dump: GDB_XM_FILE = %s\\n",
1472                       gdb_xm_file);
1473 #if defined (GDB_NM_FILE)
1474   gdb_nm_file = GDB_NM_FILE;
1475 #endif
1476   fprintf_unfiltered (file,
1477                       "gdbarch_dump: GDB_NM_FILE = %s\\n",
1478                       gdb_nm_file);
1479 #if defined (GDB_TM_FILE)
1480   gdb_tm_file = GDB_TM_FILE;
1481 #endif
1482   fprintf_unfiltered (file,
1483                       "gdbarch_dump: GDB_TM_FILE = %s\\n",
1484                       gdb_tm_file);
1485 EOF
1486 function_list | sort -t: -k 4 | while do_read
1487 do
1488     # First the predicate
1489     if class_is_predicate_p
1490     then
1491         if test -n "${macro}"
1492         then
1493             printf "#ifdef ${macro}_P\n"
1494             printf "  fprintf_unfiltered (file,\n"
1495             printf "                      \"gdbarch_dump: %%s # %%s\\\\n\",\n"
1496             printf "                      \"${macro}_P()\",\n"
1497             printf "                      XSTRING (${macro}_P ()));\n"
1498             printf "#endif\n"
1499         fi
1500         printf "  fprintf_unfiltered (file,\n"
1501         printf "                      \"gdbarch_dump: gdbarch_${function}_p() = %%d\\\\n\",\n"
1502         printf "                      gdbarch_${function}_p (current_gdbarch));\n"
1503     fi
1504     # Print the macro definition.
1505     if test -n "${macro}"
1506     then
1507         printf "#ifdef ${macro}\n"
1508         if class_is_function_p
1509         then
1510             printf "  fprintf_unfiltered (file,\n"
1511             printf "                      \"gdbarch_dump: %%s # %%s\\\\n\",\n"
1512             printf "                      \"${macro}(${actual})\",\n"
1513             printf "                      XSTRING (${macro} (${actual})));\n"
1514         else
1515             printf "  fprintf_unfiltered (file,\n"
1516             printf "                      \"gdbarch_dump: ${macro} # %%s\\\\n\",\n"
1517             printf "                      XSTRING (${macro}));\n"
1518         fi
1519         printf "#endif\n"
1520     fi
1521     # Print the corresponding value.
1522     if class_is_function_p
1523     then
1524         printf "  fprintf_unfiltered (file,\n"
1525         printf "                      \"gdbarch_dump: ${function} = <0x%%lx>\\\\n\",\n"
1526         printf "                      (long) current_gdbarch->${function});\n"
1527     else
1528         # It is a variable
1529         case "${print}:${returntype}" in
1530             :CORE_ADDR )
1531                 fmt="0x%s"
1532                 print="paddr_nz (current_gdbarch->${function})"
1533                 ;;
1534             :* )
1535                 fmt="%s"
1536                 print="paddr_d (current_gdbarch->${function})"
1537                 ;;
1538             * )
1539                 fmt="%s"
1540                 ;;
1541         esac
1542         printf "  fprintf_unfiltered (file,\n"
1543         printf "                      \"gdbarch_dump: ${function} = %s\\\\n\",\n" "${fmt}"
1544         printf "                      ${print});\n"
1545     fi
1546 done
1547 cat <<EOF
1548   if (current_gdbarch->dump_tdep != NULL)
1549     current_gdbarch->dump_tdep (current_gdbarch, file);
1550 }
1551 EOF
1552
1553
1554 # GET/SET
1555 printf "\n"
1556 cat <<EOF
1557 struct gdbarch_tdep *
1558 gdbarch_tdep (struct gdbarch *gdbarch)
1559 {
1560   if (gdbarch_debug >= 2)
1561     fprintf_unfiltered (gdb_stdlog, "gdbarch_tdep called\\n");
1562   return gdbarch->tdep;
1563 }
1564 EOF
1565 printf "\n"
1566 function_list | while do_read
1567 do
1568     if class_is_predicate_p
1569     then
1570         printf "\n"
1571         printf "int\n"
1572         printf "gdbarch_${function}_p (struct gdbarch *gdbarch)\n"
1573         printf "{\n"
1574         printf "  gdb_assert (gdbarch != NULL);\n"
1575         printf "  return ${predicate};\n"
1576         printf "}\n"
1577     fi
1578     if class_is_function_p
1579     then
1580         printf "\n"
1581         printf "${returntype}\n"
1582         if [ "x${formal}" = "xvoid" ]
1583         then
1584           printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1585         else
1586           printf "gdbarch_${function} (struct gdbarch *gdbarch, ${formal})\n"
1587         fi
1588         printf "{\n"
1589         printf "  gdb_assert (gdbarch != NULL);\n"
1590         printf "  gdb_assert (gdbarch->${function} != NULL);\n"
1591         if class_is_predicate_p && test -n "${predefault}"
1592         then
1593             # Allow a call to a function with a predicate.
1594             printf "  /* Do not check predicate: ${predicate}, allow call.  */\n"
1595         fi
1596         printf "  if (gdbarch_debug >= 2)\n"
1597         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1598         if [ "x${actual}" = "x-" -o "x${actual}" = "x" ]
1599         then
1600             if class_is_multiarch_p
1601             then
1602                 params="gdbarch"
1603             else
1604                 params=""
1605             fi
1606         else
1607             if class_is_multiarch_p
1608             then
1609                 params="gdbarch, ${actual}"
1610             else
1611                 params="${actual}"
1612             fi
1613         fi
1614         if [ "x${returntype}" = "xvoid" ]
1615         then
1616           printf "  gdbarch->${function} (${params});\n"
1617         else
1618           printf "  return gdbarch->${function} (${params});\n"
1619         fi
1620         printf "}\n"
1621         printf "\n"
1622         printf "void\n"
1623         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1624         printf "            `echo ${function} | sed -e 's/./ /g'`  gdbarch_${function}_ftype ${function})\n"
1625         printf "{\n"
1626         printf "  gdbarch->${function} = ${function};\n"
1627         printf "}\n"
1628     elif class_is_variable_p
1629     then
1630         printf "\n"
1631         printf "${returntype}\n"
1632         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1633         printf "{\n"
1634         printf "  gdb_assert (gdbarch != NULL);\n"
1635         if [ "x${invalid_p}" = "x0" ]
1636         then
1637             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1638         elif [ -n "${invalid_p}" ]
1639         then
1640             printf "  /* Check variable is valid.  */\n"
1641             printf "  gdb_assert (!(${invalid_p}));\n"
1642         elif [ -n "${predefault}" ]
1643         then
1644             printf "  /* Check variable changed from pre-default.  */\n"
1645             printf "  gdb_assert (gdbarch->${function} != ${predefault});\n"
1646         fi
1647         printf "  if (gdbarch_debug >= 2)\n"
1648         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1649         printf "  return gdbarch->${function};\n"
1650         printf "}\n"
1651         printf "\n"
1652         printf "void\n"
1653         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1654         printf "            `echo ${function} | sed -e 's/./ /g'`  ${returntype} ${function})\n"
1655         printf "{\n"
1656         printf "  gdbarch->${function} = ${function};\n"
1657         printf "}\n"
1658     elif class_is_info_p
1659     then
1660         printf "\n"
1661         printf "${returntype}\n"
1662         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1663         printf "{\n"
1664         printf "  gdb_assert (gdbarch != NULL);\n"
1665         printf "  if (gdbarch_debug >= 2)\n"
1666         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1667         printf "  return gdbarch->${function};\n"
1668         printf "}\n"
1669     fi
1670 done
1671
1672 # All the trailing guff
1673 cat <<EOF
1674
1675
1676 /* Keep a registry of per-architecture data-pointers required by GDB
1677    modules. */
1678
1679 struct gdbarch_data
1680 {
1681   unsigned index;
1682   int init_p;
1683   gdbarch_data_pre_init_ftype *pre_init;
1684   gdbarch_data_post_init_ftype *post_init;
1685 };
1686
1687 struct gdbarch_data_registration
1688 {
1689   struct gdbarch_data *data;
1690   struct gdbarch_data_registration *next;
1691 };
1692
1693 struct gdbarch_data_registry
1694 {
1695   unsigned nr;
1696   struct gdbarch_data_registration *registrations;
1697 };
1698
1699 struct gdbarch_data_registry gdbarch_data_registry =
1700 {
1701   0, NULL,
1702 };
1703
1704 static struct gdbarch_data *
1705 gdbarch_data_register (gdbarch_data_pre_init_ftype *pre_init,
1706                        gdbarch_data_post_init_ftype *post_init)
1707 {
1708   struct gdbarch_data_registration **curr;
1709   /* Append the new registraration.  */
1710   for (curr = &gdbarch_data_registry.registrations;
1711        (*curr) != NULL;
1712        curr = &(*curr)->next);
1713   (*curr) = XMALLOC (struct gdbarch_data_registration);
1714   (*curr)->next = NULL;
1715   (*curr)->data = XMALLOC (struct gdbarch_data);
1716   (*curr)->data->index = gdbarch_data_registry.nr++;
1717   (*curr)->data->pre_init = pre_init;
1718   (*curr)->data->post_init = post_init;
1719   (*curr)->data->init_p = 1;
1720   return (*curr)->data;
1721 }
1722
1723 struct gdbarch_data *
1724 gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *pre_init)
1725 {
1726   return gdbarch_data_register (pre_init, NULL);
1727 }
1728
1729 struct gdbarch_data *
1730 gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *post_init)
1731 {
1732   return gdbarch_data_register (NULL, post_init);
1733 }
1734
1735 /* Create/delete the gdbarch data vector. */
1736
1737 static void
1738 alloc_gdbarch_data (struct gdbarch *gdbarch)
1739 {
1740   gdb_assert (gdbarch->data == NULL);
1741   gdbarch->nr_data = gdbarch_data_registry.nr;
1742   gdbarch->data = GDBARCH_OBSTACK_CALLOC (gdbarch, gdbarch->nr_data, void *);
1743 }
1744
1745 /* Initialize the current value of the specified per-architecture
1746    data-pointer. */
1747
1748 void
1749 deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1750                              struct gdbarch_data *data,
1751                              void *pointer)
1752 {
1753   gdb_assert (data->index < gdbarch->nr_data);
1754   gdb_assert (gdbarch->data[data->index] == NULL);
1755   gdb_assert (data->pre_init == NULL);
1756   gdbarch->data[data->index] = pointer;
1757 }
1758
1759 /* Return the current value of the specified per-architecture
1760    data-pointer. */
1761
1762 void *
1763 gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *data)
1764 {
1765   gdb_assert (data->index < gdbarch->nr_data);
1766   if (gdbarch->data[data->index] == NULL)
1767     {
1768       /* The data-pointer isn't initialized, call init() to get a
1769          value.  */
1770       if (data->pre_init != NULL)
1771         /* Mid architecture creation: pass just the obstack, and not
1772            the entire architecture, as that way it isn't possible for
1773            pre-init code to refer to undefined architecture
1774            fields.  */
1775         gdbarch->data[data->index] = data->pre_init (gdbarch->obstack);
1776       else if (gdbarch->initialized_p
1777                && data->post_init != NULL)
1778         /* Post architecture creation: pass the entire architecture
1779            (as all fields are valid), but be careful to also detect
1780            recursive references.  */
1781         {
1782           gdb_assert (data->init_p);
1783           data->init_p = 0;
1784           gdbarch->data[data->index] = data->post_init (gdbarch);
1785           data->init_p = 1;
1786         }
1787       else
1788         /* The architecture initialization hasn't completed - punt -
1789          hope that the caller knows what they are doing.  Once
1790          deprecated_set_gdbarch_data has been initialized, this can be
1791          changed to an internal error.  */
1792         return NULL;
1793       gdb_assert (gdbarch->data[data->index] != NULL);
1794     }
1795   return gdbarch->data[data->index];
1796 }
1797
1798
1799 /* Keep a registry of the architectures known by GDB. */
1800
1801 struct gdbarch_registration
1802 {
1803   enum bfd_architecture bfd_architecture;
1804   gdbarch_init_ftype *init;
1805   gdbarch_dump_tdep_ftype *dump_tdep;
1806   struct gdbarch_list *arches;
1807   struct gdbarch_registration *next;
1808 };
1809
1810 static struct gdbarch_registration *gdbarch_registry = NULL;
1811
1812 static void
1813 append_name (const char ***buf, int *nr, const char *name)
1814 {
1815   *buf = xrealloc (*buf, sizeof (char**) * (*nr + 1));
1816   (*buf)[*nr] = name;
1817   *nr += 1;
1818 }
1819
1820 const char **
1821 gdbarch_printable_names (void)
1822 {
1823   /* Accumulate a list of names based on the registed list of
1824      architectures. */
1825   enum bfd_architecture a;
1826   int nr_arches = 0;
1827   const char **arches = NULL;
1828   struct gdbarch_registration *rego;
1829   for (rego = gdbarch_registry;
1830        rego != NULL;
1831        rego = rego->next)
1832     {
1833       const struct bfd_arch_info *ap;
1834       ap = bfd_lookup_arch (rego->bfd_architecture, 0);
1835       if (ap == NULL)
1836         internal_error (__FILE__, __LINE__,
1837                         _("gdbarch_architecture_names: multi-arch unknown"));
1838       do
1839         {
1840           append_name (&arches, &nr_arches, ap->printable_name);
1841           ap = ap->next;
1842         }
1843       while (ap != NULL);
1844     }
1845   append_name (&arches, &nr_arches, NULL);
1846   return arches;
1847 }
1848
1849
1850 void
1851 gdbarch_register (enum bfd_architecture bfd_architecture,
1852                   gdbarch_init_ftype *init,
1853                   gdbarch_dump_tdep_ftype *dump_tdep)
1854 {
1855   struct gdbarch_registration **curr;
1856   const struct bfd_arch_info *bfd_arch_info;
1857   /* Check that BFD recognizes this architecture */
1858   bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0);
1859   if (bfd_arch_info == NULL)
1860     {
1861       internal_error (__FILE__, __LINE__,
1862                       _("gdbarch: Attempt to register unknown architecture (%d)"),
1863                       bfd_architecture);
1864     }
1865   /* Check that we haven't seen this architecture before */
1866   for (curr = &gdbarch_registry;
1867        (*curr) != NULL;
1868        curr = &(*curr)->next)
1869     {
1870       if (bfd_architecture == (*curr)->bfd_architecture)
1871         internal_error (__FILE__, __LINE__,
1872                         _("gdbarch: Duplicate registraration of architecture (%s)"),
1873                         bfd_arch_info->printable_name);
1874     }
1875   /* log it */
1876   if (gdbarch_debug)
1877     fprintf_unfiltered (gdb_stdlog, "register_gdbarch_init (%s, 0x%08lx)\n",
1878                         bfd_arch_info->printable_name,
1879                         (long) init);
1880   /* Append it */
1881   (*curr) = XMALLOC (struct gdbarch_registration);
1882   (*curr)->bfd_architecture = bfd_architecture;
1883   (*curr)->init = init;
1884   (*curr)->dump_tdep = dump_tdep;
1885   (*curr)->arches = NULL;
1886   (*curr)->next = NULL;
1887 }
1888
1889 void
1890 register_gdbarch_init (enum bfd_architecture bfd_architecture,
1891                        gdbarch_init_ftype *init)
1892 {
1893   gdbarch_register (bfd_architecture, init, NULL);
1894 }
1895
1896
1897 /* Look for an architecture using gdbarch_info.  */
1898
1899 struct gdbarch_list *
1900 gdbarch_list_lookup_by_info (struct gdbarch_list *arches,
1901                              const struct gdbarch_info *info)
1902 {
1903   for (; arches != NULL; arches = arches->next)
1904     {
1905       if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info)
1906         continue;
1907       if (info->byte_order != arches->gdbarch->byte_order)
1908         continue;
1909       if (info->osabi != arches->gdbarch->osabi)
1910         continue;
1911       if (info->target_desc != arches->gdbarch->target_desc)
1912         continue;
1913       return arches;
1914     }
1915   return NULL;
1916 }
1917
1918
1919 /* Find an architecture that matches the specified INFO.  Create a new
1920    architecture if needed.  Return that new architecture.  Assumes
1921    that there is no current architecture.  */
1922
1923 static struct gdbarch *
1924 find_arch_by_info (struct gdbarch_info info)
1925 {
1926   struct gdbarch *new_gdbarch;
1927   struct gdbarch_registration *rego;
1928
1929   /* The existing architecture has been swapped out - all this code
1930      works from a clean slate.  */
1931   gdb_assert (current_gdbarch == NULL);
1932
1933   /* Fill in missing parts of the INFO struct using a number of
1934      sources: "set ..."; INFOabfd supplied; and the global
1935      defaults.  */
1936   gdbarch_info_fill (&info);
1937
1938   /* Must have found some sort of architecture. */
1939   gdb_assert (info.bfd_arch_info != NULL);
1940
1941   if (gdbarch_debug)
1942     {
1943       fprintf_unfiltered (gdb_stdlog,
1944                           "find_arch_by_info: info.bfd_arch_info %s\n",
1945                           (info.bfd_arch_info != NULL
1946                            ? info.bfd_arch_info->printable_name
1947                            : "(null)"));
1948       fprintf_unfiltered (gdb_stdlog,
1949                           "find_arch_by_info: info.byte_order %d (%s)\n",
1950                           info.byte_order,
1951                           (info.byte_order == BFD_ENDIAN_BIG ? "big"
1952                            : info.byte_order == BFD_ENDIAN_LITTLE ? "little"
1953                            : "default"));
1954       fprintf_unfiltered (gdb_stdlog,
1955                           "find_arch_by_info: info.osabi %d (%s)\n",
1956                           info.osabi, gdbarch_osabi_name (info.osabi));
1957       fprintf_unfiltered (gdb_stdlog,
1958                           "find_arch_by_info: info.abfd 0x%lx\n",
1959                           (long) info.abfd);
1960       fprintf_unfiltered (gdb_stdlog,
1961                           "find_arch_by_info: info.tdep_info 0x%lx\n",
1962                           (long) info.tdep_info);
1963     }
1964
1965   /* Find the tdep code that knows about this architecture.  */
1966   for (rego = gdbarch_registry;
1967        rego != NULL;
1968        rego = rego->next)
1969     if (rego->bfd_architecture == info.bfd_arch_info->arch)
1970       break;
1971   if (rego == NULL)
1972     {
1973       if (gdbarch_debug)
1974         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
1975                             "No matching architecture\n");
1976       return 0;
1977     }
1978
1979   /* Ask the tdep code for an architecture that matches "info".  */
1980   new_gdbarch = rego->init (info, rego->arches);
1981
1982   /* Did the tdep code like it?  No.  Reject the change and revert to
1983      the old architecture.  */
1984   if (new_gdbarch == NULL)
1985     {
1986       if (gdbarch_debug)
1987         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
1988                             "Target rejected architecture\n");
1989       return NULL;
1990     }
1991
1992   /* Is this a pre-existing architecture (as determined by already
1993      being initialized)?  Move it to the front of the architecture
1994      list (keeping the list sorted Most Recently Used).  */
1995   if (new_gdbarch->initialized_p)
1996     {
1997       struct gdbarch_list **list;
1998       struct gdbarch_list *this;
1999       if (gdbarch_debug)
2000         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2001                             "Previous architecture 0x%08lx (%s) selected\n",
2002                             (long) new_gdbarch,
2003                             new_gdbarch->bfd_arch_info->printable_name);
2004       /* Find the existing arch in the list.  */
2005       for (list = &rego->arches;
2006            (*list) != NULL && (*list)->gdbarch != new_gdbarch;
2007            list = &(*list)->next);
2008       /* It had better be in the list of architectures.  */
2009       gdb_assert ((*list) != NULL && (*list)->gdbarch == new_gdbarch);
2010       /* Unlink THIS.  */
2011       this = (*list);
2012       (*list) = this->next;
2013       /* Insert THIS at the front.  */
2014       this->next = rego->arches;
2015       rego->arches = this;
2016       /* Return it.  */
2017       return new_gdbarch;
2018     }
2019
2020   /* It's a new architecture.  */
2021   if (gdbarch_debug)
2022     fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2023                         "New architecture 0x%08lx (%s) selected\n",
2024                         (long) new_gdbarch,
2025                         new_gdbarch->bfd_arch_info->printable_name);
2026
2027   /* Insert the new architecture into the front of the architecture
2028      list (keep the list sorted Most Recently Used).  */
2029   {
2030     struct gdbarch_list *this = XMALLOC (struct gdbarch_list);
2031     this->next = rego->arches;
2032     this->gdbarch = new_gdbarch;
2033     rego->arches = this;
2034   }
2035
2036   /* Check that the newly installed architecture is valid.  Plug in
2037      any post init values.  */
2038   new_gdbarch->dump_tdep = rego->dump_tdep;
2039   verify_gdbarch (new_gdbarch);
2040   new_gdbarch->initialized_p = 1;
2041
2042   if (gdbarch_debug)
2043     gdbarch_dump (new_gdbarch, gdb_stdlog);
2044
2045   return new_gdbarch;
2046 }
2047
2048 struct gdbarch *
2049 gdbarch_find_by_info (struct gdbarch_info info)
2050 {
2051   struct gdbarch *new_gdbarch;
2052
2053   /* Save the previously selected architecture, setting the global to
2054      NULL.  This stops things like gdbarch->init() trying to use the
2055      previous architecture's configuration.  The previous architecture
2056      may not even be of the same architecture family.  The most recent
2057      architecture of the same family is found at the head of the
2058      rego->arches list.  */
2059   struct gdbarch *old_gdbarch = current_gdbarch;
2060   current_gdbarch = NULL;
2061
2062   /* Find the specified architecture.  */
2063   new_gdbarch = find_arch_by_info (info);
2064
2065   /* Restore the existing architecture.  */
2066   gdb_assert (current_gdbarch == NULL);
2067   current_gdbarch = old_gdbarch;
2068
2069   return new_gdbarch;
2070 }
2071
2072 /* Make the specified architecture current.  */
2073
2074 void
2075 deprecated_current_gdbarch_select_hack (struct gdbarch *new_gdbarch)
2076 {
2077   gdb_assert (new_gdbarch != NULL);
2078   gdb_assert (current_gdbarch != NULL);
2079   gdb_assert (new_gdbarch->initialized_p);
2080   current_gdbarch = new_gdbarch;
2081   architecture_changed_event ();
2082   reinit_frame_cache ();
2083 }
2084
2085 extern void _initialize_gdbarch (void);
2086
2087 void
2088 _initialize_gdbarch (void)
2089 {
2090   struct cmd_list_element *c;
2091
2092   add_setshow_zinteger_cmd ("arch", class_maintenance, &gdbarch_debug, _("\\
2093 Set architecture debugging."), _("\\
2094 Show architecture debugging."), _("\\
2095 When non-zero, architecture debugging is enabled."),
2096                             NULL,
2097                             show_gdbarch_debug,
2098                             &setdebuglist, &showdebuglist);
2099 }
2100 EOF
2101
2102 # close things off
2103 exec 1>&2
2104 #../move-if-change new-gdbarch.c gdbarch.c
2105 compare_new gdbarch.c