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, 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
 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 m::int:stabs_argument_has_addr:struct type *type:type::default_stabs_argument_has_addr::0
 550 v::int:frame_red_zone_size
 551 #
 552 m::CORE_ADDR:convert_from_func_ptr_addr:CORE_ADDR addr, struct target_ops *targ:addr, targ::convert_from_func_ptr_addr_identity::0
 553 # On some machines there are bits in addresses which are not really
 554 # part of the address, but are used by the kernel, the hardware, etc.
 555 # for special purposes.  gdbarch_addr_bits_remove takes out any such bits so
 556 # we get a "real" address such as one would find in a symbol table.
 557 # This is used only for addresses of instructions, and even then I'm
 558 # not sure it's used in all contexts.  It exists to deal with there
 559 # being a few stray bits in the PC which would mislead us, not as some
 560 # sort of generic thing to handle alignment or segmentation (it's
 561 # possible it should be in TARGET_READ_PC instead).
 562 f::CORE_ADDR:addr_bits_remove:CORE_ADDR addr:addr::core_addr_identity::0
 563 # It is not at all clear why gdbarch_smash_text_address is not folded into
 564 # gdbarch_addr_bits_remove.
 565 f::CORE_ADDR:smash_text_address:CORE_ADDR addr:addr::core_addr_identity::0
 566
 567 # FIXME/cagney/2001-01-18: This should be split in two.  A target method that
 568 # indicates if the target needs software single step.  An ISA method to
 569 # implement it.
 570 #
 571 # FIXME/cagney/2001-01-18: This should be replaced with something that inserts
 572 # breakpoints using the breakpoint system instead of blatting memory directly
 573 # (as with rs6000).
 574 #
 575 # FIXME/cagney/2001-01-18: The logic is backwards.  It should be asking if the
 576 # target can single step.  If not, then implement single step using breakpoints.
 577 #
 578 # A return value of 1 means that the software_single_step breakpoints
 579 # were inserted; 0 means they were not.
 580 F::int:software_single_step:struct frame_info *frame:frame
 581
 582 # Return non-zero if the processor is executing a delay slot and a
 583 # further single-step is needed before the instruction finishes.
 584 M::int:single_step_through_delay:struct frame_info *frame:frame
 585 # FIXME: cagney/2003-08-28: Need to find a better way of selecting the
 586 # disassembler.  Perhaps objdump can handle it?
 587 f::int:print_insn:bfd_vma vma, struct disassemble_info *info:vma, info::0:
 588 f::CORE_ADDR:skip_trampoline_code:struct frame_info *frame, CORE_ADDR pc:frame, pc::generic_skip_trampoline_code::0
 589
 590
 591 # If IN_SOLIB_DYNSYM_RESOLVE_CODE returns true, and SKIP_SOLIB_RESOLVER
 592 # evaluates non-zero, this is the address where the debugger will place
 593 # a step-resume breakpoint to get us past the dynamic linker.
 594 m::CORE_ADDR:skip_solib_resolver:CORE_ADDR pc:pc::generic_skip_solib_resolver::0
 595 # Some systems also have trampoline code for returning from shared libs.
 596 f::int:in_solib_return_trampoline:CORE_ADDR pc, char *name:pc, name::generic_in_solib_return_trampoline::0
 597
 598 # A target might have problems with watchpoints as soon as the stack
 599 # frame of the current function has been destroyed.  This mostly happens
 600 # as the first action in a funtion's epilogue.  in_function_epilogue_p()
 601 # is defined to return a non-zero value if either the given addr is one
 602 # instruction after the stack destroying instruction up to the trailing
 603 # return instruction or if we can figure out that the stack frame has
 604 # already been invalidated regardless of the value of addr.  Targets
 605 # which don't suffer from that problem could just let this functionality
 606 # untouched.
 607 m::int:in_function_epilogue_p:CORE_ADDR addr:addr:0:generic_in_function_epilogue_p::0
 608 # Given a vector of command-line arguments, return a newly allocated
 609 # string which, when passed to the create_inferior function, will be
 610 # parsed (on Unix systems, by the shell) to yield the same vector.
 611 # This function should call error() if the argument vector is not
 612 # representable for this target or if this target does not support
 613 # command-line arguments.
 614 # ARGC is the number of elements in the vector.
 615 # ARGV is an array of strings, one per argument.
 616 m::char *:construct_inferior_arguments:int argc, char **argv:argc, argv::construct_inferior_arguments::0
 617 f::void:elf_make_msymbol_special:asymbol *sym, struct minimal_symbol *msym:sym, msym::default_elf_make_msymbol_special::0
 618 f::void:coff_make_msymbol_special:int val, struct minimal_symbol *msym:val, msym::default_coff_make_msymbol_special::0
 619 v::const char *:name_of_malloc:::"malloc":"malloc"::0:current_gdbarch->name_of_malloc
 620 v::int:cannot_step_breakpoint:::0:0::0
 621 v::int:have_nonsteppable_watchpoint:::0:0::0
 622 F::int:address_class_type_flags:int byte_size, int dwarf2_addr_class:byte_size, dwarf2_addr_class
 623 M::const char *:address_class_type_flags_to_name:int type_flags:type_flags
 624 M::int:address_class_name_to_type_flags:const char *name, int *type_flags_ptr:name, type_flags_ptr
 625 # Is a register in a group
 626 m::int:register_reggroup_p:int regnum, struct reggroup *reggroup:regnum, reggroup::default_register_reggroup_p::0
 627 # Fetch the pointer to the ith function argument.
 628 F::CORE_ADDR:fetch_pointer_argument:struct frame_info *frame, int argi, struct type *type:frame, argi, type
 629
 630 # Return the appropriate register set for a core file section with
 631 # name SECT_NAME and size SECT_SIZE.
 632 M::const struct regset *:regset_from_core_section:const char *sect_name, size_t sect_size:sect_name, sect_size
 633
 634 # Read offset OFFSET of TARGET_OBJECT_LIBRARIES formatted shared libraries list from
 635 # core file into buffer READBUF with length LEN.
 636 M::LONGEST:core_xfer_shared_libraries:gdb_byte *readbuf, ULONGEST offset, LONGEST len:readbuf, offset, len
 637
 638 # If the elements of C++ vtables are in-place function descriptors rather
 639 # than normal function pointers (which may point to code or a descriptor),
 640 # set this to one.
 641 v::int:vtable_function_descriptors:::0:0::0
 642
 643 # Set if the least significant bit of the delta is used instead of the least
 644 # significant bit of the pfn for pointers to virtual member functions.
 645 v::int:vbit_in_delta:::0:0::0
 646
 647 # Advance PC to next instruction in order to skip a permanent breakpoint.
 648 F::void:skip_permanent_breakpoint:struct regcache *regcache:regcache
 649
 650 # Refresh overlay mapped state for section OSECT.
 651 F::void:overlay_update:struct obj_section *osect:osect
 652
 653 M::const struct target_desc *:core_read_description:struct target_ops *target, bfd *abfd:target, abfd
 654 EOF
 655 }
 656
 657 #
 658 # The .log file
 659 #
 660 exec > new-gdbarch.log
 661 function_list | while do_read
 662 do
 663     cat <<EOF
 664 ${class} ${returntype} ${function} ($formal)
 665 EOF
 666     for r in ${read}
 667     do
 668         eval echo \"\ \ \ \ ${r}=\${${r}}\"
 669     done
 670     if class_is_predicate_p && fallback_default_p
 671     then
 672         echo "Error: predicate function ${function} can not have a non- multi-arch default" 1>&2
 673         kill $$
 674         exit 1
 675     fi
 676     if [ "x${invalid_p}" = "x0" -a -n "${postdefault}" ]
 677     then
 678         echo "Error: postdefault is useless when invalid_p=0" 1>&2
 679         kill $$
 680         exit 1
 681     fi
 682     if class_is_multiarch_p
 683     then
 684         if class_is_predicate_p ; then :
 685         elif test "x${predefault}" = "x"
 686         then
 687             echo "Error: pure multi-arch function ${function} must have a predefault" 1>&2
 688             kill $$
 689             exit 1
 690         fi
 691     fi
 692     echo ""
 693 done
 694
 695 exec 1>&2
 696 compare_new gdbarch.log
 697
 698
 699 copyright ()
 700 {
 701 cat <<EOF
 702 /* *INDENT-OFF* */ /* THIS FILE IS GENERATED */
 703
 704 /* Dynamic architecture support for GDB, the GNU debugger.
 705
 706    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
 707    Free Software Foundation, Inc.
 708
 709    This file is part of GDB.
 710
 711    This program is free software; you can redistribute it and/or modify
 712    it under the terms of the GNU General Public License as published by
 713    the Free Software Foundation; either version 3 of the License, or
 714    (at your option) any later version.
 715
 716    This program is distributed in the hope that it will be useful,
 717    but WITHOUT ANY WARRANTY; without even the implied warranty of
 718    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 719    GNU General Public License for more details.
 720
 721    You should have received a copy of the GNU General Public License
 722    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 723
 724 /* This file was created with the aid of \`\`gdbarch.sh''.
 725
 726    The Bourne shell script \`\`gdbarch.sh'' creates the files
 727    \`\`new-gdbarch.c'' and \`\`new-gdbarch.h and then compares them
 728    against the existing \`\`gdbarch.[hc]''.  Any differences found
 729    being reported.
 730
 731    If editing this file, please also run gdbarch.sh and merge any
 732    changes into that script. Conversely, when making sweeping changes
 733    to this file, modifying gdbarch.sh and using its output may prove
 734    easier. */
 735
 736 EOF
 737 }
 738
 739 #
 740 # The .h file
 741 #
 742
 743 exec > new-gdbarch.h
 744 copyright
 745 cat <<EOF
 746 #ifndef GDBARCH_H
 747 #define GDBARCH_H
 748
 749 struct floatformat;
 750 struct ui_file;
 751 struct frame_info;
 752 struct value;
 753 struct objfile;
 754 struct obj_section;
 755 struct minimal_symbol;
 756 struct regcache;
 757 struct reggroup;
 758 struct regset;
 759 struct disassemble_info;
 760 struct target_ops;
 761 struct obstack;
 762 struct bp_target_info;
 763 struct target_desc;
 764
 765 extern struct gdbarch *current_gdbarch;
 766 EOF
 767
 768 # function typedef's
 769 printf "\n"
 770 printf "\n"
 771 printf "/* The following are pre-initialized by GDBARCH. */\n"
 772 function_list | while do_read
 773 do
 774     if class_is_info_p
 775     then
 776         printf "\n"
 777         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 778         printf "/* set_gdbarch_${function}() - not applicable - pre-initialized. */\n"
 779         if test -n "${macro}"
 780         then
 781             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 782             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 783             printf "#endif\n"
 784             printf "#if !defined (${macro})\n"
 785             printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 786             printf "#endif\n"
 787         fi
 788     fi
 789 done
 790
 791 # function typedef's
 792 printf "\n"
 793 printf "\n"
 794 printf "/* The following are initialized by the target dependent code. */\n"
 795 function_list | while do_read
 796 do
 797     if [ -n "${comment}" ]
 798     then
 799         echo "${comment}" | sed \
 800             -e '2 s,#,/*,' \
 801             -e '3,$ s,#,  ,' \
 802             -e '$ s,$, */,'
 803     fi
 804
 805     if class_is_predicate_p
 806     then
 807         if test -n "${macro}"
 808         then
 809             printf "\n"
 810             printf "#if defined (${macro})\n"
 811             printf "/* Legacy for systems yet to multi-arch ${macro} */\n"
 812             printf "#if !defined (${macro}_P)\n"
 813             printf "#define ${macro}_P() (1)\n"
 814             printf "#endif\n"
 815             printf "#endif\n"
 816         fi
 817         printf "\n"
 818         printf "extern int gdbarch_${function}_p (struct gdbarch *gdbarch);\n"
 819         if test -n "${macro}"
 820         then
 821             printf "#if !defined (GDB_TM_FILE) && defined (${macro}_P)\n"
 822             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 823             printf "#endif\n"
 824             printf "#if !defined (${macro}_P)\n"
 825             printf "#define ${macro}_P() (gdbarch_${function}_p (current_gdbarch))\n"
 826             printf "#endif\n"
 827         fi
 828     fi
 829     if class_is_variable_p
 830     then
 831         printf "\n"
 832         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 833         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, ${returntype} ${function});\n"
 834         if test -n "${macro}"
 835         then
 836             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 837             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 838             printf "#endif\n"
 839             printf "#if !defined (${macro})\n"
 840             printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 841             printf "#endif\n"
 842         fi
 843     fi
 844     if class_is_function_p
 845     then
 846         printf "\n"
 847         if [ "x${formal}" = "xvoid" ] && class_is_multiarch_p
 848         then
 849             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch);\n"
 850         elif class_is_multiarch_p
 851         then
 852             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch, ${formal});\n"
 853         else
 854             printf "typedef ${returntype} (gdbarch_${function}_ftype) (${formal});\n"
 855         fi
 856         if [ "x${formal}" = "xvoid" ]
 857         then
 858           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 859         else
 860           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch, ${formal});\n"
 861         fi
 862         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, gdbarch_${function}_ftype *${function});\n"
 863         if test -n "${macro}"
 864         then
 865             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 866             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 867             printf "#endif\n"
 868             if [ "x${actual}" = "x" ]
 869             then
 870                 d="#define ${macro}() (gdbarch_${function} (current_gdbarch))"
 871             elif [ "x${actual}" = "x-" ]
 872             then
 873                 d="#define ${macro} (gdbarch_${function} (current_gdbarch))"
 874             else
 875                 d="#define ${macro}(${actual}) (gdbarch_${function} (current_gdbarch, ${actual}))"
 876             fi
 877             printf "#if !defined (${macro})\n"
 878             if [ "x${actual}" = "x" ]
 879             then
 880                 printf "#define ${macro}() (gdbarch_${function} (current_gdbarch))\n"
 881             elif [ "x${actual}" = "x-" ]
 882             then
 883                 printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 884             else
 885                 printf "#define ${macro}(${actual}) (gdbarch_${function} (current_gdbarch, ${actual}))\n"
 886             fi
 887             printf "#endif\n"
 888         fi
 889     fi
 890 done
 891
 892 # close it off
 893 cat <<EOF
 894
 895 extern struct gdbarch_tdep *gdbarch_tdep (struct gdbarch *gdbarch);
 896
 897
 898 /* Mechanism for co-ordinating the selection of a specific
 899    architecture.
 900
 901    GDB targets (*-tdep.c) can register an interest in a specific
 902    architecture.  Other GDB components can register a need to maintain
 903    per-architecture data.
 904
 905    The mechanisms below ensures that there is only a loose connection
 906    between the set-architecture command and the various GDB
 907    components.  Each component can independently register their need
 908    to maintain architecture specific data with gdbarch.
 909
 910    Pragmatics:
 911
 912    Previously, a single TARGET_ARCHITECTURE_HOOK was provided.  It
 913    didn't scale.
 914
 915    The more traditional mega-struct containing architecture specific
 916    data for all the various GDB components was also considered.  Since
 917    GDB is built from a variable number of (fairly independent)
 918    components it was determined that the global aproach was not
 919    applicable. */
 920
 921
 922 /* Register a new architectural family with GDB.
 923
 924    Register support for the specified ARCHITECTURE with GDB.  When
 925    gdbarch determines that the specified architecture has been
 926    selected, the corresponding INIT function is called.
 927
 928    --
 929
 930    The INIT function takes two parameters: INFO which contains the
 931    information available to gdbarch about the (possibly new)
 932    architecture; ARCHES which is a list of the previously created
 933    \`\`struct gdbarch'' for this architecture.
 934
 935    The INFO parameter is, as far as possible, be pre-initialized with
 936    information obtained from INFO.ABFD or the global defaults.
 937
 938    The ARCHES parameter is a linked list (sorted most recently used)
 939    of all the previously created architures for this architecture
 940    family.  The (possibly NULL) ARCHES->gdbarch can used to access
 941    values from the previously selected architecture for this
 942    architecture family.  The global \`\`current_gdbarch'' shall not be
 943    used.
 944
 945    The INIT function shall return any of: NULL - indicating that it
 946    doesn't recognize the selected architecture; an existing \`\`struct
 947    gdbarch'' from the ARCHES list - indicating that the new
 948    architecture is just a synonym for an earlier architecture (see
 949    gdbarch_list_lookup_by_info()); a newly created \`\`struct gdbarch''
 950    - that describes the selected architecture (see gdbarch_alloc()).
 951
 952    The DUMP_TDEP function shall print out all target specific values.
 953    Care should be taken to ensure that the function works in both the
 954    multi-arch and non- multi-arch cases. */
 955
 956 struct gdbarch_list
 957 {
 958   struct gdbarch *gdbarch;
 959   struct gdbarch_list *next;
 960 };
 961
 962 struct gdbarch_info
 963 {
 964   /* Use default: NULL (ZERO). */
 965   const struct bfd_arch_info *bfd_arch_info;
 966
 967   /* Use default: BFD_ENDIAN_UNKNOWN (NB: is not ZERO).  */
 968   int byte_order;
 969
 970   /* Use default: NULL (ZERO). */
 971   bfd *abfd;
 972
 973   /* Use default: NULL (ZERO). */
 974   struct gdbarch_tdep_info *tdep_info;
 975
 976   /* Use default: GDB_OSABI_UNINITIALIZED (-1).  */
 977   enum gdb_osabi osabi;
 978
 979   /* Use default: NULL (ZERO).  */
 980   const struct target_desc *target_desc;
 981 };
 982
 983 typedef struct gdbarch *(gdbarch_init_ftype) (struct gdbarch_info info, struct gdbarch_list *arches);
 984 typedef void (gdbarch_dump_tdep_ftype) (struct gdbarch *gdbarch, struct ui_file *file);
 985
 986 /* DEPRECATED - use gdbarch_register() */
 987 extern void register_gdbarch_init (enum bfd_architecture architecture, gdbarch_init_ftype *);
 988
 989 extern void gdbarch_register (enum bfd_architecture architecture,
 990                               gdbarch_init_ftype *,
 991                               gdbarch_dump_tdep_ftype *);
 992
 993
 994 /* Return a freshly allocated, NULL terminated, array of the valid
 995    architecture names.  Since architectures are registered during the
 996    _initialize phase this function only returns useful information
 997    once initialization has been completed. */
 998
 999 extern const char **gdbarch_printable_names (void);
1000
1001
1002 /* Helper function.  Search the list of ARCHES for a GDBARCH that
1003    matches the information provided by INFO. */
1004
1005 extern struct gdbarch_list *gdbarch_list_lookup_by_info (struct gdbarch_list *arches, const struct gdbarch_info *info);
1006
1007
1008 /* Helper function.  Create a preliminary \`\`struct gdbarch''.  Perform
1009    basic initialization using values obtained from the INFO and TDEP
1010    parameters.  set_gdbarch_*() functions are called to complete the
1011    initialization of the object. */
1012
1013 extern struct gdbarch *gdbarch_alloc (const struct gdbarch_info *info, struct gdbarch_tdep *tdep);
1014
1015
1016 /* Helper function.  Free a partially-constructed \`\`struct gdbarch''.
1017    It is assumed that the caller freeds the \`\`struct
1018    gdbarch_tdep''. */
1019
1020 extern void gdbarch_free (struct gdbarch *);
1021
1022
1023 /* Helper function.  Allocate memory from the \`\`struct gdbarch''
1024    obstack.  The memory is freed when the corresponding architecture
1025    is also freed.  */
1026
1027 extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
1028 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
1029 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
1030
1031
1032 /* Helper function. Force an update of the current architecture.
1033
1034    The actual architecture selected is determined by INFO, \`\`(gdb) set
1035    architecture'' et.al., the existing architecture and BFD's default
1036    architecture.  INFO should be initialized to zero and then selected
1037    fields should be updated.
1038
1039    Returns non-zero if the update succeeds */
1040
1041 extern int gdbarch_update_p (struct gdbarch_info info);
1042
1043
1044 /* Helper function.  Find an architecture matching info.
1045
1046    INFO should be initialized using gdbarch_info_init, relevant fields
1047    set, and then finished using gdbarch_info_fill.
1048
1049    Returns the corresponding architecture, or NULL if no matching
1050    architecture was found.  "current_gdbarch" is not updated.  */
1051
1052 extern struct gdbarch *gdbarch_find_by_info (struct gdbarch_info info);
1053
1054
1055 /* Helper function.  Set the global "current_gdbarch" to "gdbarch".
1056
1057    FIXME: kettenis/20031124: Of the functions that follow, only
1058    gdbarch_from_bfd is supposed to survive.  The others will
1059    dissappear since in the future GDB will (hopefully) be truly
1060    multi-arch.  However, for now we're still stuck with the concept of
1061    a single active architecture.  */
1062
1063 extern void deprecated_current_gdbarch_select_hack (struct gdbarch *gdbarch);
1064
1065
1066 /* Register per-architecture data-pointer.
1067
1068    Reserve space for a per-architecture data-pointer.  An identifier
1069    for the reserved data-pointer is returned.  That identifer should
1070    be saved in a local static variable.
1071
1072    Memory for the per-architecture data shall be allocated using
1073    gdbarch_obstack_zalloc.  That memory will be deleted when the
1074    corresponding architecture object is deleted.
1075
1076    When a previously created architecture is re-selected, the
1077    per-architecture data-pointer for that previous architecture is
1078    restored.  INIT() is not re-called.
1079
1080    Multiple registrarants for any architecture are allowed (and
1081    strongly encouraged).  */
1082
1083 struct gdbarch_data;
1084
1085 typedef void *(gdbarch_data_pre_init_ftype) (struct obstack *obstack);
1086 extern struct gdbarch_data *gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *init);
1087 typedef void *(gdbarch_data_post_init_ftype) (struct gdbarch *gdbarch);
1088 extern struct gdbarch_data *gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *init);
1089 extern void deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1090                                          struct gdbarch_data *data,
1091                                          void *pointer);
1092
1093 extern void *gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *);
1094
1095
1096 /* Set the dynamic target-system-dependent parameters (architecture,
1097    byte-order, ...) using information found in the BFD */
1098
1099 extern void set_gdbarch_from_file (bfd *);
1100
1101
1102 /* Initialize the current architecture to the "first" one we find on
1103    our list.  */
1104
1105 extern void initialize_current_architecture (void);
1106
1107 /* gdbarch trace variable */
1108 extern int gdbarch_debug;
1109
1110 extern void gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file);
1111
1112 #endif
1113 EOF
1114 exec 1>&2
1115 #../move-if-change new-gdbarch.h gdbarch.h
1116 compare_new gdbarch.h
1117
1118
1119 #
1120 # C file
1121 #
1122
1123 exec > new-gdbarch.c
1124 copyright
1125 cat <<EOF
1126
1127 #include "defs.h"
1128 #include "arch-utils.h"
1129
1130 #include "gdbcmd.h"
1131 #include "inferior.h"
1132 #include "symcat.h"
1133
1134 #include "floatformat.h"
1135
1136 #include "gdb_assert.h"
1137 #include "gdb_string.h"
1138 #include "gdb-events.h"
1139 #include "reggroups.h"
1140 #include "osabi.h"
1141 #include "gdb_obstack.h"
1142
1143 /* Static function declarations */
1144
1145 static void alloc_gdbarch_data (struct gdbarch *);
1146
1147 /* Non-zero if we want to trace architecture code.  */
1148
1149 #ifndef GDBARCH_DEBUG
1150 #define GDBARCH_DEBUG 0
1151 #endif
1152 int gdbarch_debug = GDBARCH_DEBUG;
1153 static void
1154 show_gdbarch_debug (struct ui_file *file, int from_tty,
1155                     struct cmd_list_element *c, const char *value)
1156 {
1157   fprintf_filtered (file, _("Architecture debugging is %s.\\n"), value);
1158 }
1159
1160 static const char *
1161 pformat (const struct floatformat **format)
1162 {
1163   if (format == NULL)
1164     return "(null)";
1165   else
1166     /* Just print out one of them - this is only for diagnostics.  */
1167     return format[0]->name;
1168 }
1169
1170 EOF
1171
1172 # gdbarch open the gdbarch object
1173 printf "\n"
1174 printf "/* Maintain the struct gdbarch object */\n"
1175 printf "\n"
1176 printf "struct gdbarch\n"
1177 printf "{\n"
1178 printf "  /* Has this architecture been fully initialized?  */\n"
1179 printf "  int initialized_p;\n"
1180 printf "\n"
1181 printf "  /* An obstack bound to the lifetime of the architecture.  */\n"
1182 printf "  struct obstack *obstack;\n"
1183 printf "\n"
1184 printf "  /* basic architectural information */\n"
1185 function_list | while do_read
1186 do
1187     if class_is_info_p
1188     then
1189         printf "  ${returntype} ${function};\n"
1190     fi
1191 done
1192 printf "\n"
1193 printf "  /* target specific vector. */\n"
1194 printf "  struct gdbarch_tdep *tdep;\n"
1195 printf "  gdbarch_dump_tdep_ftype *dump_tdep;\n"
1196 printf "\n"
1197 printf "  /* per-architecture data-pointers */\n"
1198 printf "  unsigned nr_data;\n"
1199 printf "  void **data;\n"
1200 printf "\n"
1201 printf "  /* per-architecture swap-regions */\n"
1202 printf "  struct gdbarch_swap *swap;\n"
1203 printf "\n"
1204 cat <<EOF
1205   /* Multi-arch values.
1206
1207      When extending this structure you must:
1208
1209      Add the field below.
1210
1211      Declare set/get functions and define the corresponding
1212      macro in gdbarch.h.
1213
1214      gdbarch_alloc(): If zero/NULL is not a suitable default,
1215      initialize the new field.
1216
1217      verify_gdbarch(): Confirm that the target updated the field
1218      correctly.
1219
1220      gdbarch_dump(): Add a fprintf_unfiltered call so that the new
1221      field is dumped out
1222
1223      \`\`startup_gdbarch()'': Append an initial value to the static
1224      variable (base values on the host's c-type system).
1225
1226      get_gdbarch(): Implement the set/get functions (probably using
1227      the macro's as shortcuts).
1228
1229      */
1230
1231 EOF
1232 function_list | while do_read
1233 do
1234     if class_is_variable_p
1235     then
1236         printf "  ${returntype} ${function};\n"
1237     elif class_is_function_p
1238     then
1239         printf "  gdbarch_${function}_ftype *${function};\n"
1240     fi
1241 done
1242 printf "};\n"
1243
1244 # A pre-initialized vector
1245 printf "\n"
1246 printf "\n"
1247 cat <<EOF
1248 /* The default architecture uses host values (for want of a better
1249    choice). */
1250 EOF
1251 printf "\n"
1252 printf "extern const struct bfd_arch_info bfd_default_arch_struct;\n"
1253 printf "\n"
1254 printf "struct gdbarch startup_gdbarch =\n"
1255 printf "{\n"
1256 printf "  1, /* Always initialized.  */\n"
1257 printf "  NULL, /* The obstack.  */\n"
1258 printf "  /* basic architecture information */\n"
1259 function_list | while do_read
1260 do
1261     if class_is_info_p
1262     then
1263         printf "  ${staticdefault},  /* ${function} */\n"
1264     fi
1265 done
1266 cat <<EOF
1267   /* target specific vector and its dump routine */
1268   NULL, NULL,
1269   /*per-architecture data-pointers and swap regions */
1270   0, NULL, NULL,
1271   /* Multi-arch values */
1272 EOF
1273 function_list | while do_read
1274 do
1275     if class_is_function_p || class_is_variable_p
1276     then
1277         printf "  ${staticdefault},  /* ${function} */\n"
1278     fi
1279 done
1280 cat <<EOF
1281   /* startup_gdbarch() */
1282 };
1283
1284 struct gdbarch *current_gdbarch = &startup_gdbarch;
1285 EOF
1286
1287 # Create a new gdbarch struct
1288 cat <<EOF
1289
1290 /* Create a new \`\`struct gdbarch'' based on information provided by
1291    \`\`struct gdbarch_info''. */
1292 EOF
1293 printf "\n"
1294 cat <<EOF
1295 struct gdbarch *
1296 gdbarch_alloc (const struct gdbarch_info *info,
1297                struct gdbarch_tdep *tdep)
1298 {
1299   /* NOTE: The new architecture variable is named \`\`current_gdbarch''
1300      so that macros such as TARGET_ARCHITECTURE, when expanded, refer to
1301      the current local architecture and not the previous global
1302      architecture.  This ensures that the new architectures initial
1303      values are not influenced by the previous architecture.  Once
1304      everything is parameterised with gdbarch, this will go away.  */
1305   struct gdbarch *current_gdbarch;
1306
1307   /* Create an obstack for allocating all the per-architecture memory,
1308      then use that to allocate the architecture vector.  */
1309   struct obstack *obstack = XMALLOC (struct obstack);
1310   obstack_init (obstack);
1311   current_gdbarch = obstack_alloc (obstack, sizeof (*current_gdbarch));
1312   memset (current_gdbarch, 0, sizeof (*current_gdbarch));
1313   current_gdbarch->obstack = obstack;
1314
1315   alloc_gdbarch_data (current_gdbarch);
1316
1317   current_gdbarch->tdep = tdep;
1318 EOF
1319 printf "\n"
1320 function_list | while do_read
1321 do
1322     if class_is_info_p
1323     then
1324         printf "  current_gdbarch->${function} = info->${function};\n"
1325     fi
1326 done
1327 printf "\n"
1328 printf "  /* Force the explicit initialization of these. */\n"
1329 function_list | while do_read
1330 do
1331     if class_is_function_p || class_is_variable_p
1332     then
1333         if [ -n "${predefault}" -a "x${predefault}" != "x0" ]
1334         then
1335           printf "  current_gdbarch->${function} = ${predefault};\n"
1336         fi
1337     fi
1338 done
1339 cat <<EOF
1340   /* gdbarch_alloc() */
1341
1342   return current_gdbarch;
1343 }
1344 EOF
1345
1346 # Free a gdbarch struct.
1347 printf "\n"
1348 printf "\n"
1349 cat <<EOF
1350 /* Allocate extra space using the per-architecture obstack.  */
1351
1352 void *
1353 gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
1354 {
1355   void *data = obstack_alloc (arch->obstack, size);
1356   memset (data, 0, size);
1357   return data;
1358 }
1359
1360
1361 /* Free a gdbarch struct.  This should never happen in normal
1362    operation --- once you've created a gdbarch, you keep it around.
1363    However, if an architecture's init function encounters an error
1364    building the structure, it may need to clean up a partially
1365    constructed gdbarch.  */
1366
1367 void
1368 gdbarch_free (struct gdbarch *arch)
1369 {
1370   struct obstack *obstack;
1371   gdb_assert (arch != NULL);
1372   gdb_assert (!arch->initialized_p);
1373   obstack = arch->obstack;
1374   obstack_free (obstack, 0); /* Includes the ARCH.  */
1375   xfree (obstack);
1376 }
1377 EOF
1378
1379 # verify a new architecture
1380 cat <<EOF
1381
1382
1383 /* Ensure that all values in a GDBARCH are reasonable.  */
1384
1385 /* NOTE/WARNING: The parameter is called \`\`current_gdbarch'' so that it
1386    just happens to match the global variable \`\`current_gdbarch''.  That
1387    way macros refering to that variable get the local and not the global
1388    version - ulgh.  Once everything is parameterised with gdbarch, this
1389    will go away. */
1390
1391 static void
1392 verify_gdbarch (struct gdbarch *current_gdbarch)
1393 {
1394   struct ui_file *log;
1395   struct cleanup *cleanups;
1396   long dummy;
1397   char *buf;
1398   log = mem_fileopen ();
1399   cleanups = make_cleanup_ui_file_delete (log);
1400   /* fundamental */
1401   if (current_gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)
1402     fprintf_unfiltered (log, "\n\tbyte-order");
1403   if (current_gdbarch->bfd_arch_info == NULL)
1404     fprintf_unfiltered (log, "\n\tbfd_arch_info");
1405   /* Check those that need to be defined for the given multi-arch level. */
1406 EOF
1407 function_list | while do_read
1408 do
1409     if class_is_function_p || class_is_variable_p
1410     then
1411         if [ "x${invalid_p}" = "x0" ]
1412         then
1413             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1414         elif class_is_predicate_p
1415         then
1416             printf "  /* Skip verify of ${function}, has predicate */\n"
1417         # FIXME: See do_read for potential simplification
1418         elif [ -n "${invalid_p}" -a -n "${postdefault}" ]
1419         then
1420             printf "  if (${invalid_p})\n"
1421             printf "    current_gdbarch->${function} = ${postdefault};\n"
1422         elif [ -n "${predefault}" -a -n "${postdefault}" ]
1423         then
1424             printf "  if (current_gdbarch->${function} == ${predefault})\n"
1425             printf "    current_gdbarch->${function} = ${postdefault};\n"
1426         elif [ -n "${postdefault}" ]
1427         then
1428             printf "  if (current_gdbarch->${function} == 0)\n"
1429             printf "    current_gdbarch->${function} = ${postdefault};\n"
1430         elif [ -n "${invalid_p}" ]
1431         then
1432             printf "  if (${invalid_p})\n"
1433             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1434         elif [ -n "${predefault}" ]
1435         then
1436             printf "  if (current_gdbarch->${function} == ${predefault})\n"
1437             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1438         fi
1439     fi
1440 done
1441 cat <<EOF
1442   buf = ui_file_xstrdup (log, &dummy);
1443   make_cleanup (xfree, buf);
1444   if (strlen (buf) > 0)
1445     internal_error (__FILE__, __LINE__,
1446                     _("verify_gdbarch: the following are invalid ...%s"),
1447                     buf);
1448   do_cleanups (cleanups);
1449 }
1450 EOF
1451
1452 # dump the structure
1453 printf "\n"
1454 printf "\n"
1455 cat <<EOF
1456 /* Print out the details of the current architecture. */
1457
1458 /* NOTE/WARNING: The parameter is called \`\`current_gdbarch'' so that it
1459    just happens to match the global variable \`\`current_gdbarch''.  That
1460    way macros refering to that variable get the local and not the global
1461    version - ulgh.  Once everything is parameterised with gdbarch, this
1462    will go away. */
1463
1464 void
1465 gdbarch_dump (struct gdbarch *current_gdbarch, struct ui_file *file)
1466 {
1467   const char *gdb_xm_file = "<not-defined>";
1468   const char *gdb_nm_file = "<not-defined>";
1469   const char *gdb_tm_file = "<not-defined>";
1470 #if defined (GDB_XM_FILE)
1471   gdb_xm_file = GDB_XM_FILE;
1472 #endif
1473   fprintf_unfiltered (file,
1474                       "gdbarch_dump: GDB_XM_FILE = %s\\n",
1475                       gdb_xm_file);
1476 #if defined (GDB_NM_FILE)
1477   gdb_nm_file = GDB_NM_FILE;
1478 #endif
1479   fprintf_unfiltered (file,
1480                       "gdbarch_dump: GDB_NM_FILE = %s\\n",
1481                       gdb_nm_file);
1482 #if defined (GDB_TM_FILE)
1483   gdb_tm_file = GDB_TM_FILE;
1484 #endif
1485   fprintf_unfiltered (file,
1486                       "gdbarch_dump: GDB_TM_FILE = %s\\n",
1487                       gdb_tm_file);
1488 EOF
1489 function_list | sort -t: -k 4 | while do_read
1490 do
1491     # First the predicate
1492     if class_is_predicate_p
1493     then
1494         if test -n "${macro}"
1495         then
1496             printf "#ifdef ${macro}_P\n"
1497             printf "  fprintf_unfiltered (file,\n"
1498             printf "                      \"gdbarch_dump: %%s # %%s\\\\n\",\n"
1499             printf "                      \"${macro}_P()\",\n"
1500             printf "                      XSTRING (${macro}_P ()));\n"
1501             printf "#endif\n"
1502         fi
1503         printf "  fprintf_unfiltered (file,\n"
1504         printf "                      \"gdbarch_dump: gdbarch_${function}_p() = %%d\\\\n\",\n"
1505         printf "                      gdbarch_${function}_p (current_gdbarch));\n"
1506     fi
1507     # Print the macro definition.
1508     if test -n "${macro}"
1509     then
1510         printf "#ifdef ${macro}\n"
1511         if class_is_function_p
1512         then
1513             printf "  fprintf_unfiltered (file,\n"
1514             printf "                      \"gdbarch_dump: %%s # %%s\\\\n\",\n"
1515             printf "                      \"${macro}(${actual})\",\n"
1516             printf "                      XSTRING (${macro} (${actual})));\n"
1517         else
1518             printf "  fprintf_unfiltered (file,\n"
1519             printf "                      \"gdbarch_dump: ${macro} # %%s\\\\n\",\n"
1520             printf "                      XSTRING (${macro}));\n"
1521         fi
1522         printf "#endif\n"
1523     fi
1524     # Print the corresponding value.
1525     if class_is_function_p
1526     then
1527         printf "  fprintf_unfiltered (file,\n"
1528         printf "                      \"gdbarch_dump: ${function} = <0x%%lx>\\\\n\",\n"
1529         printf "                      (long) current_gdbarch->${function});\n"
1530     else
1531         # It is a variable
1532         case "${print}:${returntype}" in
1533             :CORE_ADDR )
1534                 fmt="0x%s"
1535                 print="paddr_nz (current_gdbarch->${function})"
1536                 ;;
1537             :* )
1538                 fmt="%s"
1539                 print="paddr_d (current_gdbarch->${function})"
1540                 ;;
1541             * )
1542                 fmt="%s"
1543                 ;;
1544         esac
1545         printf "  fprintf_unfiltered (file,\n"
1546         printf "                      \"gdbarch_dump: ${function} = %s\\\\n\",\n" "${fmt}"
1547         printf "                      ${print});\n"
1548     fi
1549 done
1550 cat <<EOF
1551   if (current_gdbarch->dump_tdep != NULL)
1552     current_gdbarch->dump_tdep (current_gdbarch, file);
1553 }
1554 EOF
1555
1556
1557 # GET/SET
1558 printf "\n"
1559 cat <<EOF
1560 struct gdbarch_tdep *
1561 gdbarch_tdep (struct gdbarch *gdbarch)
1562 {
1563   if (gdbarch_debug >= 2)
1564     fprintf_unfiltered (gdb_stdlog, "gdbarch_tdep called\\n");
1565   return gdbarch->tdep;
1566 }
1567 EOF
1568 printf "\n"
1569 function_list | while do_read
1570 do
1571     if class_is_predicate_p
1572     then
1573         printf "\n"
1574         printf "int\n"
1575         printf "gdbarch_${function}_p (struct gdbarch *gdbarch)\n"
1576         printf "{\n"
1577         printf "  gdb_assert (gdbarch != NULL);\n"
1578         printf "  return ${predicate};\n"
1579         printf "}\n"
1580     fi
1581     if class_is_function_p
1582     then
1583         printf "\n"
1584         printf "${returntype}\n"
1585         if [ "x${formal}" = "xvoid" ]
1586         then
1587           printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1588         else
1589           printf "gdbarch_${function} (struct gdbarch *gdbarch, ${formal})\n"
1590         fi
1591         printf "{\n"
1592         printf "  gdb_assert (gdbarch != NULL);\n"
1593         printf "  gdb_assert (gdbarch->${function} != NULL);\n"
1594         if class_is_predicate_p && test -n "${predefault}"
1595         then
1596             # Allow a call to a function with a predicate.
1597             printf "  /* Do not check predicate: ${predicate}, allow call.  */\n"
1598         fi
1599         printf "  if (gdbarch_debug >= 2)\n"
1600         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1601         if [ "x${actual}" = "x-" -o "x${actual}" = "x" ]
1602         then
1603             if class_is_multiarch_p
1604             then
1605                 params="gdbarch"
1606             else
1607                 params=""
1608             fi
1609         else
1610             if class_is_multiarch_p
1611             then
1612                 params="gdbarch, ${actual}"
1613             else
1614                 params="${actual}"
1615             fi
1616         fi
1617         if [ "x${returntype}" = "xvoid" ]
1618         then
1619           printf "  gdbarch->${function} (${params});\n"
1620         else
1621           printf "  return gdbarch->${function} (${params});\n"
1622         fi
1623         printf "}\n"
1624         printf "\n"
1625         printf "void\n"
1626         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1627         printf "            `echo ${function} | sed -e 's/./ /g'`  gdbarch_${function}_ftype ${function})\n"
1628         printf "{\n"
1629         printf "  gdbarch->${function} = ${function};\n"
1630         printf "}\n"
1631     elif class_is_variable_p
1632     then
1633         printf "\n"
1634         printf "${returntype}\n"
1635         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1636         printf "{\n"
1637         printf "  gdb_assert (gdbarch != NULL);\n"
1638         if [ "x${invalid_p}" = "x0" ]
1639         then
1640             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1641         elif [ -n "${invalid_p}" ]
1642         then
1643             printf "  /* Check variable is valid.  */\n"
1644             printf "  gdb_assert (!(${invalid_p}));\n"
1645         elif [ -n "${predefault}" ]
1646         then
1647             printf "  /* Check variable changed from pre-default.  */\n"
1648             printf "  gdb_assert (gdbarch->${function} != ${predefault});\n"
1649         fi
1650         printf "  if (gdbarch_debug >= 2)\n"
1651         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1652         printf "  return gdbarch->${function};\n"
1653         printf "}\n"
1654         printf "\n"
1655         printf "void\n"
1656         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1657         printf "            `echo ${function} | sed -e 's/./ /g'`  ${returntype} ${function})\n"
1658         printf "{\n"
1659         printf "  gdbarch->${function} = ${function};\n"
1660         printf "}\n"
1661     elif class_is_info_p
1662     then
1663         printf "\n"
1664         printf "${returntype}\n"
1665         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1666         printf "{\n"
1667         printf "  gdb_assert (gdbarch != NULL);\n"
1668         printf "  if (gdbarch_debug >= 2)\n"
1669         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1670         printf "  return gdbarch->${function};\n"
1671         printf "}\n"
1672     fi
1673 done
1674
1675 # All the trailing guff
1676 cat <<EOF
1677
1678
1679 /* Keep a registry of per-architecture data-pointers required by GDB
1680    modules. */
1681
1682 struct gdbarch_data
1683 {
1684   unsigned index;
1685   int init_p;
1686   gdbarch_data_pre_init_ftype *pre_init;
1687   gdbarch_data_post_init_ftype *post_init;
1688 };
1689
1690 struct gdbarch_data_registration
1691 {
1692   struct gdbarch_data *data;
1693   struct gdbarch_data_registration *next;
1694 };
1695
1696 struct gdbarch_data_registry
1697 {
1698   unsigned nr;
1699   struct gdbarch_data_registration *registrations;
1700 };
1701
1702 struct gdbarch_data_registry gdbarch_data_registry =
1703 {
1704   0, NULL,
1705 };
1706
1707 static struct gdbarch_data *
1708 gdbarch_data_register (gdbarch_data_pre_init_ftype *pre_init,
1709                        gdbarch_data_post_init_ftype *post_init)
1710 {
1711   struct gdbarch_data_registration **curr;
1712   /* Append the new registraration.  */
1713   for (curr = &gdbarch_data_registry.registrations;
1714        (*curr) != NULL;
1715        curr = &(*curr)->next);
1716   (*curr) = XMALLOC (struct gdbarch_data_registration);
1717   (*curr)->next = NULL;
1718   (*curr)->data = XMALLOC (struct gdbarch_data);
1719   (*curr)->data->index = gdbarch_data_registry.nr++;
1720   (*curr)->data->pre_init = pre_init;
1721   (*curr)->data->post_init = post_init;
1722   (*curr)->data->init_p = 1;
1723   return (*curr)->data;
1724 }
1725
1726 struct gdbarch_data *
1727 gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *pre_init)
1728 {
1729   return gdbarch_data_register (pre_init, NULL);
1730 }
1731
1732 struct gdbarch_data *
1733 gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *post_init)
1734 {
1735   return gdbarch_data_register (NULL, post_init);
1736 }
1737
1738 /* Create/delete the gdbarch data vector. */
1739
1740 static void
1741 alloc_gdbarch_data (struct gdbarch *gdbarch)
1742 {
1743   gdb_assert (gdbarch->data == NULL);
1744   gdbarch->nr_data = gdbarch_data_registry.nr;
1745   gdbarch->data = GDBARCH_OBSTACK_CALLOC (gdbarch, gdbarch->nr_data, void *);
1746 }
1747
1748 /* Initialize the current value of the specified per-architecture
1749    data-pointer. */
1750
1751 void
1752 deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1753                              struct gdbarch_data *data,
1754                              void *pointer)
1755 {
1756   gdb_assert (data->index < gdbarch->nr_data);
1757   gdb_assert (gdbarch->data[data->index] == NULL);
1758   gdb_assert (data->pre_init == NULL);
1759   gdbarch->data[data->index] = pointer;
1760 }
1761
1762 /* Return the current value of the specified per-architecture
1763    data-pointer. */
1764
1765 void *
1766 gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *data)
1767 {
1768   gdb_assert (data->index < gdbarch->nr_data);
1769   if (gdbarch->data[data->index] == NULL)
1770     {
1771       /* The data-pointer isn't initialized, call init() to get a
1772          value.  */
1773       if (data->pre_init != NULL)
1774         /* Mid architecture creation: pass just the obstack, and not
1775            the entire architecture, as that way it isn't possible for
1776            pre-init code to refer to undefined architecture
1777            fields.  */
1778         gdbarch->data[data->index] = data->pre_init (gdbarch->obstack);
1779       else if (gdbarch->initialized_p
1780                && data->post_init != NULL)
1781         /* Post architecture creation: pass the entire architecture
1782            (as all fields are valid), but be careful to also detect
1783            recursive references.  */
1784         {
1785           gdb_assert (data->init_p);
1786           data->init_p = 0;
1787           gdbarch->data[data->index] = data->post_init (gdbarch);
1788           data->init_p = 1;
1789         }
1790       else
1791         /* The architecture initialization hasn't completed - punt -
1792          hope that the caller knows what they are doing.  Once
1793          deprecated_set_gdbarch_data has been initialized, this can be
1794          changed to an internal error.  */
1795         return NULL;
1796       gdb_assert (gdbarch->data[data->index] != NULL);
1797     }
1798   return gdbarch->data[data->index];
1799 }
1800
1801
1802 /* Keep a registry of the architectures known by GDB. */
1803
1804 struct gdbarch_registration
1805 {
1806   enum bfd_architecture bfd_architecture;
1807   gdbarch_init_ftype *init;
1808   gdbarch_dump_tdep_ftype *dump_tdep;
1809   struct gdbarch_list *arches;
1810   struct gdbarch_registration *next;
1811 };
1812
1813 static struct gdbarch_registration *gdbarch_registry = NULL;
1814
1815 static void
1816 append_name (const char ***buf, int *nr, const char *name)
1817 {
1818   *buf = xrealloc (*buf, sizeof (char**) * (*nr + 1));
1819   (*buf)[*nr] = name;
1820   *nr += 1;
1821 }
1822
1823 const char **
1824 gdbarch_printable_names (void)
1825 {
1826   /* Accumulate a list of names based on the registed list of
1827      architectures. */
1828   enum bfd_architecture a;
1829   int nr_arches = 0;
1830   const char **arches = NULL;
1831   struct gdbarch_registration *rego;
1832   for (rego = gdbarch_registry;
1833        rego != NULL;
1834        rego = rego->next)
1835     {
1836       const struct bfd_arch_info *ap;
1837       ap = bfd_lookup_arch (rego->bfd_architecture, 0);
1838       if (ap == NULL)
1839         internal_error (__FILE__, __LINE__,
1840                         _("gdbarch_architecture_names: multi-arch unknown"));
1841       do
1842         {
1843           append_name (&arches, &nr_arches, ap->printable_name);
1844           ap = ap->next;
1845         }
1846       while (ap != NULL);
1847     }
1848   append_name (&arches, &nr_arches, NULL);
1849   return arches;
1850 }
1851
1852
1853 void
1854 gdbarch_register (enum bfd_architecture bfd_architecture,
1855                   gdbarch_init_ftype *init,
1856                   gdbarch_dump_tdep_ftype *dump_tdep)
1857 {
1858   struct gdbarch_registration **curr;
1859   const struct bfd_arch_info *bfd_arch_info;
1860   /* Check that BFD recognizes this architecture */
1861   bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0);
1862   if (bfd_arch_info == NULL)
1863     {
1864       internal_error (__FILE__, __LINE__,
1865                       _("gdbarch: Attempt to register unknown architecture (%d)"),
1866                       bfd_architecture);
1867     }
1868   /* Check that we haven't seen this architecture before */
1869   for (curr = &gdbarch_registry;
1870        (*curr) != NULL;
1871        curr = &(*curr)->next)
1872     {
1873       if (bfd_architecture == (*curr)->bfd_architecture)
1874         internal_error (__FILE__, __LINE__,
1875                         _("gdbarch: Duplicate registraration of architecture (%s)"),
1876                         bfd_arch_info->printable_name);
1877     }
1878   /* log it */
1879   if (gdbarch_debug)
1880     fprintf_unfiltered (gdb_stdlog, "register_gdbarch_init (%s, 0x%08lx)\n",
1881                         bfd_arch_info->printable_name,
1882                         (long) init);
1883   /* Append it */
1884   (*curr) = XMALLOC (struct gdbarch_registration);
1885   (*curr)->bfd_architecture = bfd_architecture;
1886   (*curr)->init = init;
1887   (*curr)->dump_tdep = dump_tdep;
1888   (*curr)->arches = NULL;
1889   (*curr)->next = NULL;
1890 }
1891
1892 void
1893 register_gdbarch_init (enum bfd_architecture bfd_architecture,
1894                        gdbarch_init_ftype *init)
1895 {
1896   gdbarch_register (bfd_architecture, init, NULL);
1897 }
1898
1899
1900 /* Look for an architecture using gdbarch_info.  */
1901
1902 struct gdbarch_list *
1903 gdbarch_list_lookup_by_info (struct gdbarch_list *arches,
1904                              const struct gdbarch_info *info)
1905 {
1906   for (; arches != NULL; arches = arches->next)
1907     {
1908       if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info)
1909         continue;
1910       if (info->byte_order != arches->gdbarch->byte_order)
1911         continue;
1912       if (info->osabi != arches->gdbarch->osabi)
1913         continue;
1914       if (info->target_desc != arches->gdbarch->target_desc)
1915         continue;
1916       return arches;
1917     }
1918   return NULL;
1919 }
1920
1921
1922 /* Find an architecture that matches the specified INFO.  Create a new
1923    architecture if needed.  Return that new architecture.  Assumes
1924    that there is no current architecture.  */
1925
1926 static struct gdbarch *
1927 find_arch_by_info (struct gdbarch_info info)
1928 {
1929   struct gdbarch *new_gdbarch;
1930   struct gdbarch_registration *rego;
1931
1932   /* The existing architecture has been swapped out - all this code
1933      works from a clean slate.  */
1934   gdb_assert (current_gdbarch == NULL);
1935
1936   /* Fill in missing parts of the INFO struct using a number of
1937      sources: "set ..."; INFOabfd supplied; and the global
1938      defaults.  */
1939   gdbarch_info_fill (&info);
1940
1941   /* Must have found some sort of architecture. */
1942   gdb_assert (info.bfd_arch_info != NULL);
1943
1944   if (gdbarch_debug)
1945     {
1946       fprintf_unfiltered (gdb_stdlog,
1947                           "find_arch_by_info: info.bfd_arch_info %s\n",
1948                           (info.bfd_arch_info != NULL
1949                            ? info.bfd_arch_info->printable_name
1950                            : "(null)"));
1951       fprintf_unfiltered (gdb_stdlog,
1952                           "find_arch_by_info: info.byte_order %d (%s)\n",
1953                           info.byte_order,
1954                           (info.byte_order == BFD_ENDIAN_BIG ? "big"
1955                            : info.byte_order == BFD_ENDIAN_LITTLE ? "little"
1956                            : "default"));
1957       fprintf_unfiltered (gdb_stdlog,
1958                           "find_arch_by_info: info.osabi %d (%s)\n",
1959                           info.osabi, gdbarch_osabi_name (info.osabi));
1960       fprintf_unfiltered (gdb_stdlog,
1961                           "find_arch_by_info: info.abfd 0x%lx\n",
1962                           (long) info.abfd);
1963       fprintf_unfiltered (gdb_stdlog,
1964                           "find_arch_by_info: info.tdep_info 0x%lx\n",
1965                           (long) info.tdep_info);
1966     }
1967
1968   /* Find the tdep code that knows about this architecture.  */
1969   for (rego = gdbarch_registry;
1970        rego != NULL;
1971        rego = rego->next)
1972     if (rego->bfd_architecture == info.bfd_arch_info->arch)
1973       break;
1974   if (rego == NULL)
1975     {
1976       if (gdbarch_debug)
1977         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
1978                             "No matching architecture\n");
1979       return 0;
1980     }
1981
1982   /* Ask the tdep code for an architecture that matches "info".  */
1983   new_gdbarch = rego->init (info, rego->arches);
1984
1985   /* Did the tdep code like it?  No.  Reject the change and revert to
1986      the old architecture.  */
1987   if (new_gdbarch == NULL)
1988     {
1989       if (gdbarch_debug)
1990         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
1991                             "Target rejected architecture\n");
1992       return NULL;
1993     }
1994
1995   /* Is this a pre-existing architecture (as determined by already
1996      being initialized)?  Move it to the front of the architecture
1997      list (keeping the list sorted Most Recently Used).  */
1998   if (new_gdbarch->initialized_p)
1999     {
2000       struct gdbarch_list **list;
2001       struct gdbarch_list *this;
2002       if (gdbarch_debug)
2003         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2004                             "Previous architecture 0x%08lx (%s) selected\n",
2005                             (long) new_gdbarch,
2006                             new_gdbarch->bfd_arch_info->printable_name);
2007       /* Find the existing arch in the list.  */
2008       for (list = &rego->arches;
2009            (*list) != NULL && (*list)->gdbarch != new_gdbarch;
2010            list = &(*list)->next);
2011       /* It had better be in the list of architectures.  */
2012       gdb_assert ((*list) != NULL && (*list)->gdbarch == new_gdbarch);
2013       /* Unlink THIS.  */
2014       this = (*list);
2015       (*list) = this->next;
2016       /* Insert THIS at the front.  */
2017       this->next = rego->arches;
2018       rego->arches = this;
2019       /* Return it.  */
2020       return new_gdbarch;
2021     }
2022
2023   /* It's a new architecture.  */
2024   if (gdbarch_debug)
2025     fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2026                         "New architecture 0x%08lx (%s) selected\n",
2027                         (long) new_gdbarch,
2028                         new_gdbarch->bfd_arch_info->printable_name);
2029
2030   /* Insert the new architecture into the front of the architecture
2031      list (keep the list sorted Most Recently Used).  */
2032   {
2033     struct gdbarch_list *this = XMALLOC (struct gdbarch_list);
2034     this->next = rego->arches;
2035     this->gdbarch = new_gdbarch;
2036     rego->arches = this;
2037   }
2038
2039   /* Check that the newly installed architecture is valid.  Plug in
2040      any post init values.  */
2041   new_gdbarch->dump_tdep = rego->dump_tdep;
2042   verify_gdbarch (new_gdbarch);
2043   new_gdbarch->initialized_p = 1;
2044
2045   if (gdbarch_debug)
2046     gdbarch_dump (new_gdbarch, gdb_stdlog);
2047
2048   return new_gdbarch;
2049 }
2050
2051 struct gdbarch *
2052 gdbarch_find_by_info (struct gdbarch_info info)
2053 {
2054   struct gdbarch *new_gdbarch;
2055
2056   /* Save the previously selected architecture, setting the global to
2057      NULL.  This stops things like gdbarch->init() trying to use the
2058      previous architecture's configuration.  The previous architecture
2059      may not even be of the same architecture family.  The most recent
2060      architecture of the same family is found at the head of the
2061      rego->arches list.  */
2062   struct gdbarch *old_gdbarch = current_gdbarch;
2063   current_gdbarch = NULL;
2064
2065   /* Find the specified architecture.  */
2066   new_gdbarch = find_arch_by_info (info);
2067
2068   /* Restore the existing architecture.  */
2069   gdb_assert (current_gdbarch == NULL);
2070   current_gdbarch = old_gdbarch;
2071
2072   return new_gdbarch;
2073 }
2074
2075 /* Make the specified architecture current.  */
2076
2077 void
2078 deprecated_current_gdbarch_select_hack (struct gdbarch *new_gdbarch)
2079 {
2080   gdb_assert (new_gdbarch != NULL);
2081   gdb_assert (current_gdbarch != NULL);
2082   gdb_assert (new_gdbarch->initialized_p);
2083   current_gdbarch = new_gdbarch;
2084   architecture_changed_event ();
2085   reinit_frame_cache ();
2086 }
2087
2088 extern void _initialize_gdbarch (void);
2089
2090 void
2091 _initialize_gdbarch (void)
2092 {
2093   struct cmd_list_element *c;
2094
2095   add_setshow_zinteger_cmd ("arch", class_maintenance, &gdbarch_debug, _("\\
2096 Set architecture debugging."), _("\\
2097 Show architecture debugging."), _("\\
2098 When non-zero, architecture debugging is enabled."),
2099                             NULL,
2100                             show_gdbarch_debug,
2101                             &setdebuglist, &showdebuglist);
2102 }
2103 EOF
2104
2105 # close things off
2106 exec 1>&2
2107 #../move-if-change new-gdbarch.c gdbarch.c
2108 compare_new gdbarch.c