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 2 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, write to the Free Software
  22 # Foundation, Inc., 51 Franklin Street, Fifth Floor,
  23 # Boston, MA 02110-1301, USA.
  24
  25 # Make certain that the script is not running in an internationalized
  26 # environment.
  27 LANG=c ; export LANG
  28 LC_ALL=c ; export LC_ALL
  29
  30
  31 compare_new ()
  32 {
  33     file=$1
  34     if test ! -r ${file}
  35     then
  36         echo "${file} missing? cp new-${file} ${file}" 1>&2
  37     elif diff -u ${file} new-${file}
  38     then
  39         echo "${file} unchanged" 1>&2
  40     else
  41         echo "${file} has changed? cp new-${file} ${file}" 1>&2
  42     fi
  43 }
  44
  45
  46 # Format of the input table
  47 read="class macro returntype function formal actual staticdefault predefault postdefault invalid_p print garbage_at_eol"
  48
  49 do_read ()
  50 {
  51     comment=""
  52     class=""
  53     while read line
  54     do
  55         if test "${line}" = ""
  56         then
  57             continue
  58         elif test "${line}" = "#" -a "${comment}" = ""
  59         then
  60             continue
  61         elif expr "${line}" : "#" > /dev/null
  62         then
  63             comment="${comment}
  64 ${line}"
  65         else
  66
  67             # The semantics of IFS varies between different SH's.  Some
  68             # treat ``::' as three fields while some treat it as just too.
  69             # Work around this by eliminating ``::'' ....
  70             line="`echo "${line}" | sed -e 's/::/: :/g' -e 's/::/: :/g'`"
  71
  72             OFS="${IFS}" ; IFS="[:]"
  73             eval read ${read} <<EOF
  74 ${line}
  75 EOF
  76             IFS="${OFS}"
  77
  78             if test -n "${garbage_at_eol}"
  79             then
  80                 echo "Garbage at end-of-line in ${line}" 1>&2
  81                 kill $$
  82                 exit 1
  83             fi
  84
  85             # .... and then going back through each field and strip out those
  86             # that ended up with just that space character.
  87             for r in ${read}
  88             do
  89                 if eval test \"\${${r}}\" = \"\ \"
  90                 then
  91                     eval ${r}=""
  92                 fi
  93             done
  94
  95             FUNCTION=`echo ${function} | tr '[a-z]' '[A-Z]'`
  96             if test "x${macro}" = "x="
  97             then
  98                 # Provide a UCASE version of function (for when there isn't MACRO)
  99                 macro="${FUNCTION}"
 100             elif test "${macro}" = "${FUNCTION}"
 101             then
 102                 echo "${function}: Specify = for macro field" 1>&2
 103                 kill $$
 104                 exit 1
 105             fi
 106
 107             # Check that macro definition wasn't supplied for multi-arch
 108             case "${class}" in
 109                 [mM] )
 110                     if test "${macro}" != ""
 111                     then
 112                         echo "Error: Function ${function} multi-arch yet macro ${macro} supplied" 1>&2
 113                         kill $$
 114                         exit 1
 115                     fi
 116             esac
 117
 118             case "${class}" in
 119                 m ) staticdefault="${predefault}" ;;
 120                 M ) staticdefault="0" ;;
 121                 * ) test "${staticdefault}" || staticdefault=0 ;;
 122             esac
 123
 124             case "${class}" in
 125             F | V | M )
 126                 case "${invalid_p}" in
 127                 "" )
 128                     if test -n "${predefault}"
 129                     then
 130                         #invalid_p="gdbarch->${function} == ${predefault}"
 131                         predicate="gdbarch->${function} != ${predefault}"
 132                     elif class_is_variable_p
 133                     then
 134                         predicate="gdbarch->${function} != 0"
 135                     elif class_is_function_p
 136                     then
 137                         predicate="gdbarch->${function} != NULL"
 138                     fi
 139                     ;;
 140                 * )
 141                     echo "Predicate function ${function} with invalid_p." 1>&2
 142                     kill $$
 143                     exit 1
 144                     ;;
 145                 esac
 146             esac
 147
 148             # PREDEFAULT is a valid fallback definition of MEMBER when
 149             # multi-arch is not enabled.  This ensures that the
 150             # default value, when multi-arch is the same as the
 151             # default value when not multi-arch.  POSTDEFAULT is
 152             # always a valid definition of MEMBER as this again
 153             # ensures consistency.
 154
 155             if [ -n "${postdefault}" ]
 156             then
 157                 fallbackdefault="${postdefault}"
 158             elif [ -n "${predefault}" ]
 159             then
 160                 fallbackdefault="${predefault}"
 161             else
 162                 fallbackdefault="0"
 163             fi
 164
 165             #NOT YET: See gdbarch.log for basic verification of
 166             # database
 167
 168             break
 169         fi
 170     done
 171     if [ -n "${class}" ]
 172     then
 173         true
 174     else
 175         false
 176     fi
 177 }
 178
 179
 180 fallback_default_p ()
 181 {
 182     [ -n "${postdefault}" -a "x${invalid_p}" != "x0" ] \
 183         || [ -n "${predefault}" -a "x${invalid_p}" = "x0" ]
 184 }
 185
 186 class_is_variable_p ()
 187 {
 188     case "${class}" in
 189         *v* | *V* ) true ;;
 190         * ) false ;;
 191     esac
 192 }
 193
 194 class_is_function_p ()
 195 {
 196     case "${class}" in
 197         *f* | *F* | *m* | *M* ) true ;;
 198         * ) false ;;
 199     esac
 200 }
 201
 202 class_is_multiarch_p ()
 203 {
 204     case "${class}" in
 205         *m* | *M* ) true ;;
 206         * ) false ;;
 207     esac
 208 }
 209
 210 class_is_predicate_p ()
 211 {
 212     case "${class}" in
 213         *F* | *V* | *M* ) true ;;
 214         * ) false ;;
 215     esac
 216 }
 217
 218 class_is_info_p ()
 219 {
 220     case "${class}" in
 221         *i* ) true ;;
 222         * ) false ;;
 223     esac
 224 }
 225
 226
 227 # dump out/verify the doco
 228 for field in ${read}
 229 do
 230   case ${field} in
 231
 232     class ) : ;;
 233
 234         # # -> line disable
 235         # f -> function
 236         #   hiding a function
 237         # F -> function + predicate
 238         #   hiding a function + predicate to test function validity
 239         # v -> variable
 240         #   hiding a variable
 241         # V -> variable + predicate
 242         #   hiding a variable + predicate to test variables validity
 243         # i -> set from info
 244         #   hiding something from the ``struct info'' object
 245         # m -> multi-arch function
 246         #   hiding a multi-arch function (parameterised with the architecture)
 247         # M -> multi-arch function + predicate
 248         #   hiding a multi-arch function + predicate to test function validity
 249
 250     macro ) : ;;
 251
 252         # The name of the legacy C macro by which this method can be
 253         # accessed.  If empty, no macro is defined.  If "=", a macro
 254         # formed from the upper-case function name is used.
 255
 256     returntype ) : ;;
 257
 258         # For functions, the return type; for variables, the data type
 259
 260     function ) : ;;
 261
 262         # For functions, the member function name; for variables, the
 263         # variable name.  Member function names are always prefixed with
 264         # ``gdbarch_'' for name-space purity.
 265
 266     formal ) : ;;
 267
 268         # The formal argument list.  It is assumed that the formal
 269         # argument list includes the actual name of each list element.
 270         # A function with no arguments shall have ``void'' as the
 271         # formal argument list.
 272
 273     actual ) : ;;
 274
 275         # The list of actual arguments.  The arguments specified shall
 276         # match the FORMAL list given above.  Functions with out
 277         # arguments leave this blank.
 278
 279     staticdefault ) : ;;
 280
 281         # To help with the GDB startup a static gdbarch object is
 282         # created.  STATICDEFAULT is the value to insert into that
 283         # static gdbarch object.  Since this a static object only
 284         # simple expressions can be used.
 285
 286         # If STATICDEFAULT is empty, zero is used.
 287
 288     predefault ) : ;;
 289
 290         # An initial value to assign to MEMBER of the freshly
 291         # malloc()ed gdbarch object.  After initialization, the
 292         # freshly malloc()ed object is passed to the target
 293         # architecture code for further updates.
 294
 295         # If PREDEFAULT is empty, zero is used.
 296
 297         # A non-empty PREDEFAULT, an empty POSTDEFAULT and a zero
 298         # INVALID_P are specified, PREDEFAULT will be used as the
 299         # default for the non- multi-arch target.
 300
 301         # A zero PREDEFAULT function will force the fallback to call
 302         # internal_error().
 303
 304         # Variable declarations can refer to ``gdbarch'' which will
 305         # contain the current architecture.  Care should be taken.
 306
 307     postdefault ) : ;;
 308
 309         # A value to assign to MEMBER of the new gdbarch object should
 310         # the target architecture code fail to change the PREDEFAULT
 311         # value.
 312
 313         # If POSTDEFAULT is empty, no post update is performed.
 314
 315         # If both INVALID_P and POSTDEFAULT are non-empty then
 316         # INVALID_P will be used to determine if MEMBER should be
 317         # changed to POSTDEFAULT.
 318
 319         # If a non-empty POSTDEFAULT and a zero INVALID_P are
 320         # specified, POSTDEFAULT will be used as the default for the
 321         # non- multi-arch target (regardless of the value of
 322         # PREDEFAULT).
 323
 324         # You cannot specify both a zero INVALID_P and a POSTDEFAULT.
 325
 326         # Variable declarations can refer to ``current_gdbarch'' which
 327         # will contain the current architecture.  Care should be
 328         # taken.
 329
 330     invalid_p ) : ;;
 331
 332         # A predicate equation that validates MEMBER.  Non-zero is
 333         # returned if the code creating the new architecture failed to
 334         # initialize MEMBER or the initialized the member is invalid.
 335         # If POSTDEFAULT is non-empty then MEMBER will be updated to
 336         # that value.  If POSTDEFAULT is empty then internal_error()
 337         # is called.
 338
 339         # If INVALID_P is empty, a check that MEMBER is no longer
 340         # equal to PREDEFAULT is used.
 341
 342         # The expression ``0'' disables the INVALID_P check making
 343         # PREDEFAULT a legitimate value.
 344
 345         # See also PREDEFAULT and POSTDEFAULT.
 346
 347     print ) : ;;
 348
 349         # An optional expression that convers MEMBER to a value
 350         # suitable for formatting using %s.
 351
 352         # If PRINT is empty, paddr_nz (for CORE_ADDR) or paddr_d
 353         # (anything else) is used.
 354
 355     garbage_at_eol ) : ;;
 356
 357         # Catches stray fields.
 358
 359     *)
 360         echo "Bad field ${field}"
 361         exit 1;;
 362   esac
 363 done
 364
 365
 366 function_list ()
 367 {
 368   # See below (DOCO) for description of each field
 369   cat <<EOF
 370 i::const struct bfd_arch_info *:bfd_arch_info:::&bfd_default_arch_struct::::gdbarch_bfd_arch_info (current_gdbarch)->printable_name
 371 #
 372 i::int:byte_order:::BFD_ENDIAN_BIG
 373 #
 374 i::enum gdb_osabi:osabi:::GDB_OSABI_UNKNOWN
 375 #
 376 i::const struct target_desc *:target_desc:::::::paddr_d ((long) current_gdbarch->target_desc)
 377 # Number of bits in a char or unsigned char for the target machine.
 378 # Just like CHAR_BIT in <limits.h> but describes the target machine.
 379 # v:TARGET_CHAR_BIT:int:char_bit::::8 * sizeof (char):8::0:
 380 #
 381 # Number of bits in a short or unsigned short for the target machine.
 382 v::int:short_bit:::8 * sizeof (short):2*TARGET_CHAR_BIT::0
 383 # Number of bits in an int or unsigned int for the target machine.
 384 v::int:int_bit:::8 * sizeof (int):4*TARGET_CHAR_BIT::0
 385 # Number of bits in a long or unsigned long for the target machine.
 386 v::int:long_bit:::8 * sizeof (long):4*TARGET_CHAR_BIT::0
 387 # Number of bits in a long long or unsigned long long for the target
 388 # machine.
 389 v::int:long_long_bit:::8 * sizeof (LONGEST):2*current_gdbarch->long_bit::0
 390
 391 # The ABI default bit-size and format for "float", "double", and "long
 392 # double".  These bit/format pairs should eventually be combined into
 393 # a single object.  For the moment, just initialize them as a pair.
 394 # Each format describes both the big and little endian layouts (if
 395 # useful).
 396
 397 v::int:float_bit:::8 * sizeof (float):4*TARGET_CHAR_BIT::0
 398 v::const struct floatformat **:float_format:::::floatformats_ieee_single::pformat (current_gdbarch->float_format)
 399 v::int:double_bit:::8 * sizeof (double):8*TARGET_CHAR_BIT::0
 400 v::const struct floatformat **:double_format:::::floatformats_ieee_double::pformat (current_gdbarch->double_format)
 401 v::int:long_double_bit:::8 * sizeof (long double):8*TARGET_CHAR_BIT::0
 402 v::const struct floatformat **:long_double_format:::::floatformats_ieee_double::pformat (current_gdbarch->long_double_format)
 403
 404 # For most targets, a pointer on the target and its representation as an
 405 # address in GDB have the same size and "look the same".  For such a
 406 # target, you need only set gdbarch_ptr_bit and gdbarch_addr_bit
 407 # / addr_bit will be set from it.
 408 #
 409 # If gdbarch_ptr_bit and gdbarch_addr_bit are different, you'll probably
 410 # also need to set gdbarch_pointer_to_address and gdbarch_address_to_pointer
 411 # as well.
 412 #
 413 # ptr_bit is the size of a pointer on the target
 414 v::int:ptr_bit:::8 * sizeof (void*):current_gdbarch->int_bit::0
 415 # addr_bit is the size of a target address as represented in gdb
 416 v::int:addr_bit:::8 * sizeof (void*):0:gdbarch_ptr_bit (current_gdbarch):
 417 #
 418 # One if \`char' acts like \`signed char', zero if \`unsigned char'.
 419 v::int:char_signed:::1:-1:1
 420 #
 421 F::CORE_ADDR:read_pc:struct regcache *regcache:regcache
 422 F::void:write_pc:struct regcache *regcache, CORE_ADDR val:regcache, val
 423 # Function for getting target's idea of a frame pointer.  FIXME: GDB's
 424 # whole scheme for dealing with "frames" and "frame pointers" needs a
 425 # serious shakedown.
 426 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
 427 #
 428 M::void:pseudo_register_read:struct regcache *regcache, int cookednum, gdb_byte *buf:regcache, cookednum, buf
 429 M::void:pseudo_register_write:struct regcache *regcache, int cookednum, const gdb_byte *buf:regcache, cookednum, buf
 430 #
 431 v::int:num_regs:::0:-1
 432 # This macro gives the number of pseudo-registers that live in the
 433 # register namespace but do not get fetched or stored on the target.
 434 # These pseudo-registers may be aliases for other registers,
 435 # combinations of other registers, or they may be computed by GDB.
 436 v::int:num_pseudo_regs:::0:0::0
 437
 438 # GDB's standard (or well known) register numbers.  These can map onto
 439 # a real register or a pseudo (computed) register or not be defined at
 440 # all (-1).
 441 # SP_REGNUM will hopefully be replaced by UNWIND_SP.
 442 v:=:int:sp_regnum:::-1:-1::0
 443 v:=:int:pc_regnum:::-1:-1::0
 444 v:=:int:ps_regnum:::-1:-1::0
 445 v:=:int:fp0_regnum:::0:-1::0
 446 # Convert stab register number (from \`r\' declaration) to a gdb REGNUM.
 447 f::int:stab_reg_to_regnum:int stab_regnr:stab_regnr::no_op_reg_to_regnum::0
 448 # Provide a default mapping from a ecoff register number to a gdb REGNUM.
 449 f::int:ecoff_reg_to_regnum:int ecoff_regnr:ecoff_regnr::no_op_reg_to_regnum::0
 450 # Provide a default mapping from a DWARF register number to a gdb REGNUM.
 451 f::int:dwarf_reg_to_regnum:int dwarf_regnr:dwarf_regnr::no_op_reg_to_regnum::0
 452 # Convert from an sdb register number to an internal gdb register number.
 453 f::int:sdb_reg_to_regnum:int sdb_regnr:sdb_regnr::no_op_reg_to_regnum::0
 454 f::int:dwarf2_reg_to_regnum:int dwarf2_regnr:dwarf2_regnr::no_op_reg_to_regnum::0
 455 f::const char *:register_name:int regnr:regnr
 456
 457 # Return the type of a register specified by the architecture.  Only
 458 # the register cache should call this function directly; others should
 459 # use "register_type".
 460 M::struct type *:register_type:int reg_nr:reg_nr
 461
 462 # See gdbint.texinfo, and PUSH_DUMMY_CALL.
 463 M::struct frame_id:unwind_dummy_id:struct frame_info *info:info
 464 # Implement UNWIND_DUMMY_ID and PUSH_DUMMY_CALL, then delete
 465 # DEPRECATED_FP_REGNUM.
 466 v:=:int:deprecated_fp_regnum:::-1:-1::0
 467
 468 # See gdbint.texinfo.  See infcall.c.
 469 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
 470 # DEPRECATED_REGISTER_SIZE can be deleted.
 471 v:=:int:deprecated_register_size
 472 v::int:call_dummy_location::::AT_ENTRY_POINT::0
 473 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
 474
 475 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
 476 M::void:print_float_info:struct ui_file *file, struct frame_info *frame, const char *args:file, frame, args
 477 M::void:print_vector_info:struct ui_file *file, struct frame_info *frame, const char *args:file, frame, args
 478 # MAP a GDB RAW register number onto a simulator register number.  See
 479 # also include/...-sim.h.
 480 f::int:register_sim_regno:int reg_nr:reg_nr::legacy_register_sim_regno::0
 481 f::int:cannot_fetch_register:int regnum:regnum::cannot_register_not::0
 482 f::int:cannot_store_register:int regnum:regnum::cannot_register_not::0
 483 # setjmp/longjmp support.
 484 F::int:get_longjmp_target:struct frame_info *frame, CORE_ADDR *pc:frame, pc
 485 #
 486 v:=:int:believe_pcc_promotion:::::::
 487 #
 488 f::int:convert_register_p:int regnum, struct type *type:regnum, type:0:generic_convert_register_p::0
 489 f::void:register_to_value:struct frame_info *frame, int regnum, struct type *type, gdb_byte *buf:frame, regnum, type, buf:0
 490 f::void:value_to_register:struct frame_info *frame, int regnum, struct type *type, const gdb_byte *buf:frame, regnum, type, buf:0
 491 # Construct a value representing the contents of register REGNUM in
 492 # frame FRAME, interpreted as type TYPE.  The routine needs to
 493 # allocate and return a struct value with all value attributes
 494 # (but not the value contents) filled in.
 495 f::struct value *:value_from_register:struct type *type, int regnum, struct frame_info *frame:type, regnum, frame::default_value_from_register::0
 496 #
 497 f::CORE_ADDR:pointer_to_address:struct type *type, const gdb_byte *buf:type, buf::unsigned_pointer_to_address::0
 498 f::void:address_to_pointer:struct type *type, gdb_byte *buf, CORE_ADDR addr:type, buf, addr::unsigned_address_to_pointer::0
 499 M::CORE_ADDR:integer_to_address:struct type *type, const gdb_byte *buf:type, buf
 500
 501 # It has been suggested that this, well actually its predecessor,
 502 # should take the type/value of the function to be called and not the
 503 # return type.  This is left as an exercise for the reader.
 504
 505 # NOTE: cagney/2004-06-13: The function stack.c:return_command uses
 506 # the predicate with default hack to avoid calling STORE_RETURN_VALUE
 507 # (via legacy_return_value), when a small struct is involved.
 508
 509 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
 510
 511 # The deprecated methods EXTRACT_RETURN_VALUE, STORE_RETURN_VALUE,
 512 # DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS and
 513 # DEPRECATED_USE_STRUCT_CONVENTION have all been folded into
 514 # RETURN_VALUE.
 515
 516 f:=:void:extract_return_value:struct type *type, struct regcache *regcache, gdb_byte *valbuf:type, regcache, valbuf:0
 517 f:=:void:store_return_value:struct type *type, struct regcache *regcache, const gdb_byte *valbuf:type, regcache, valbuf:0
 518 f:=:int:deprecated_use_struct_convention:int gcc_p, struct type *value_type:gcc_p, value_type::generic_use_struct_convention::0
 519
 520 # As of 2004-01-17 only the 32-bit SPARC ABI has been identified as an
 521 # ABI suitable for the implementation of a robust extract
 522 # struct-convention return-value address method (the sparc saves the
 523 # address in the callers frame).  All the other cases so far examined,
 524 # the DEPRECATED_EXTRACT_STRUCT_VALUE implementation has been
 525 # erreneous - the code was incorrectly assuming that the return-value
 526 # address, stored in a register, was preserved across the entire
 527 # function call.
 528
 529 # For the moment retain DEPRECATED_EXTRACT_STRUCT_VALUE as a marker of
 530 # the ABIs that are still to be analyzed - perhaps this should simply
 531 # be deleted.  The commented out extract_returned_value_address method
 532 # is provided as a starting point for the 32-bit SPARC.  It, or
 533 # something like it, along with changes to both infcmd.c and stack.c
 534 # will be needed for that case to work.  NB: It is passed the callers
 535 # frame since it is only after the callee has returned that this
 536 # function is used.
 537
 538 #M::CORE_ADDR:extract_returned_value_address:struct frame_info *caller_frame:caller_frame
 539 F:=:CORE_ADDR:deprecated_extract_struct_value_address:struct regcache *regcache:regcache
 540
 541 #
 542 f::CORE_ADDR:skip_prologue:CORE_ADDR ip:ip:0:0
 543 f::int:inner_than:CORE_ADDR lhs, CORE_ADDR rhs:lhs, rhs:0:0
 544 f::const gdb_byte *:breakpoint_from_pc:CORE_ADDR *pcptr, int *lenptr:pcptr, lenptr::0:
 545 M::CORE_ADDR:adjust_breakpoint_address:CORE_ADDR bpaddr:bpaddr
 546 f::int:memory_insert_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_insert_breakpoint::0
 547 f::int:memory_remove_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_remove_breakpoint::0
 548 v::CORE_ADDR:decr_pc_after_break:::0:::0
 549
 550 # A function can be addressed by either it's "pointer" (possibly a
 551 # descriptor address) or "entry point" (first executable instruction).
 552 # The method "convert_from_func_ptr_addr" converting the former to the
 553 # latter.  DEPRECATED_FUNCTION_START_OFFSET is being used to implement
 554 # a simplified subset of that functionality - the function's address
 555 # corresponds to the "function pointer" and the function's start
 556 # corresponds to the "function entry point" - and hence is redundant.
 557
 558 v:=:CORE_ADDR:deprecated_function_start_offset:::0:::0
 559
 560 # Return the remote protocol register number associated with this
 561 # register.  Normally the identity mapping.
 562 m::int:remote_register_number:int regno:regno::default_remote_register_number::0
 563
 564 # Fetch the target specific address used to represent a load module.
 565 F::CORE_ADDR:fetch_tls_load_module_address:struct objfile *objfile:objfile
 566 #
 567 v::CORE_ADDR:frame_args_skip:::0:::0
 568 M::CORE_ADDR:unwind_pc:struct frame_info *next_frame:next_frame
 569 M::CORE_ADDR:unwind_sp:struct frame_info *next_frame:next_frame
 570 # DEPRECATED_FRAME_LOCALS_ADDRESS as been replaced by the per-frame
 571 # frame-base.  Enable frame-base before frame-unwind.
 572 F::int:frame_num_args:struct frame_info *frame:frame
 573 #
 574 M::CORE_ADDR:frame_align:CORE_ADDR address:address
 575 # DEPRECATED_REG_STRUCT_HAS_ADDR has been replaced by
 576 # stabs_argument_has_addr.
 577 F:=:int:deprecated_reg_struct_has_addr:int gcc_p, struct type *type:gcc_p, type
 578 m::int:stabs_argument_has_addr:struct type *type:type::default_stabs_argument_has_addr::0
 579 v::int:frame_red_zone_size
 580 #
 581 m::CORE_ADDR:convert_from_func_ptr_addr:CORE_ADDR addr, struct target_ops *targ:addr, targ::convert_from_func_ptr_addr_identity::0
 582 # On some machines there are bits in addresses which are not really
 583 # part of the address, but are used by the kernel, the hardware, etc.
 584 # for special purposes.  gdbarch_addr_bits_remove takes out any such bits so
 585 # we get a "real" address such as one would find in a symbol table.
 586 # This is used only for addresses of instructions, and even then I'm
 587 # not sure it's used in all contexts.  It exists to deal with there
 588 # being a few stray bits in the PC which would mislead us, not as some
 589 # sort of generic thing to handle alignment or segmentation (it's
 590 # possible it should be in TARGET_READ_PC instead).
 591 f::CORE_ADDR:addr_bits_remove:CORE_ADDR addr:addr::core_addr_identity::0
 592 # It is not at all clear why gdbarch_smash_text_address is not folded into
 593 # gdbarch_addr_bits_remove.
 594 f::CORE_ADDR:smash_text_address:CORE_ADDR addr:addr::core_addr_identity::0
 595
 596 # FIXME/cagney/2001-01-18: This should be split in two.  A target method that
 597 # indicates if the target needs software single step.  An ISA method to
 598 # implement it.
 599 #
 600 # FIXME/cagney/2001-01-18: This should be replaced with something that inserts
 601 # breakpoints using the breakpoint system instead of blatting memory directly
 602 # (as with rs6000).
 603 #
 604 # FIXME/cagney/2001-01-18: The logic is backwards.  It should be asking if the
 605 # target can single step.  If not, then implement single step using breakpoints.
 606 #
 607 # A return value of 1 means that the software_single_step breakpoints
 608 # were inserted; 0 means they were not.
 609 F:=:int:software_single_step:struct frame_info *frame:frame
 610
 611 # Return non-zero if the processor is executing a delay slot and a
 612 # further single-step is needed before the instruction finishes.
 613 M::int:single_step_through_delay:struct frame_info *frame:frame
 614 # FIXME: cagney/2003-08-28: Need to find a better way of selecting the
 615 # disassembler.  Perhaps objdump can handle it?
 616 f:TARGET_PRINT_INSN:int:print_insn:bfd_vma vma, struct disassemble_info *info:vma, info::0:
 617 f::CORE_ADDR:skip_trampoline_code:struct frame_info *frame, CORE_ADDR pc:frame, pc::generic_skip_trampoline_code::0
 618
 619
 620 # If IN_SOLIB_DYNSYM_RESOLVE_CODE returns true, and SKIP_SOLIB_RESOLVER
 621 # evaluates non-zero, this is the address where the debugger will place
 622 # a step-resume breakpoint to get us past the dynamic linker.
 623 m::CORE_ADDR:skip_solib_resolver:CORE_ADDR pc:pc::generic_skip_solib_resolver::0
 624 # Some systems also have trampoline code for returning from shared libs.
 625 f::int:in_solib_return_trampoline:CORE_ADDR pc, char *name:pc, name::generic_in_solib_return_trampoline::0
 626
 627 # A target might have problems with watchpoints as soon as the stack
 628 # frame of the current function has been destroyed.  This mostly happens
 629 # as the first action in a funtion's epilogue.  in_function_epilogue_p()
 630 # is defined to return a non-zero value if either the given addr is one
 631 # instruction after the stack destroying instruction up to the trailing
 632 # return instruction or if we can figure out that the stack frame has
 633 # already been invalidated regardless of the value of addr.  Targets
 634 # which don't suffer from that problem could just let this functionality
 635 # untouched.
 636 m::int:in_function_epilogue_p:CORE_ADDR addr:addr:0:generic_in_function_epilogue_p::0
 637 # Given a vector of command-line arguments, return a newly allocated
 638 # string which, when passed to the create_inferior function, will be
 639 # parsed (on Unix systems, by the shell) to yield the same vector.
 640 # This function should call error() if the argument vector is not
 641 # representable for this target or if this target does not support
 642 # command-line arguments.
 643 # ARGC is the number of elements in the vector.
 644 # ARGV is an array of strings, one per argument.
 645 m::char *:construct_inferior_arguments:int argc, char **argv:argc, argv::construct_inferior_arguments::0
 646 f::void:elf_make_msymbol_special:asymbol *sym, struct minimal_symbol *msym:sym, msym::default_elf_make_msymbol_special::0
 647 f::void:coff_make_msymbol_special:int val, struct minimal_symbol *msym:val, msym::default_coff_make_msymbol_special::0
 648 v::const char *:name_of_malloc:::"malloc":"malloc"::0:current_gdbarch->name_of_malloc
 649 v::int:cannot_step_breakpoint:::0:0::0
 650 v::int:have_nonsteppable_watchpoint:::0:0::0
 651 F::int:address_class_type_flags:int byte_size, int dwarf2_addr_class:byte_size, dwarf2_addr_class
 652 M::const char *:address_class_type_flags_to_name:int type_flags:type_flags
 653 M::int:address_class_name_to_type_flags:const char *name, int *type_flags_ptr:name, type_flags_ptr
 654 # Is a register in a group
 655 m::int:register_reggroup_p:int regnum, struct reggroup *reggroup:regnum, reggroup::default_register_reggroup_p::0
 656 # Fetch the pointer to the ith function argument.
 657 F::CORE_ADDR:fetch_pointer_argument:struct frame_info *frame, int argi, struct type *type:frame, argi, type
 658
 659 # Return the appropriate register set for a core file section with
 660 # name SECT_NAME and size SECT_SIZE.
 661 M::const struct regset *:regset_from_core_section:const char *sect_name, size_t sect_size:sect_name, sect_size
 662
 663 # If the elements of C++ vtables are in-place function descriptors rather
 664 # than normal function pointers (which may point to code or a descriptor),
 665 # set this to one.
 666 v::int:vtable_function_descriptors:::0:0::0
 667
 668 # Set if the least significant bit of the delta is used instead of the least
 669 # significant bit of the pfn for pointers to virtual member functions.
 670 v::int:vbit_in_delta:::0:0::0
 671
 672 # Advance PC to next instruction in order to skip a permanent breakpoint.
 673 F::void:skip_permanent_breakpoint:struct regcache *regcache:regcache
 674
 675 # Refresh overlay mapped state for section OSECT.
 676 F::void:overlay_update:struct obj_section *osect:osect
 677 EOF
 678 }
 679
 680 #
 681 # The .log file
 682 #
 683 exec > new-gdbarch.log
 684 function_list | while do_read
 685 do
 686     cat <<EOF
 687 ${class} ${returntype} ${function} ($formal)
 688 EOF
 689     for r in ${read}
 690     do
 691         eval echo \"\ \ \ \ ${r}=\${${r}}\"
 692     done
 693     if class_is_predicate_p && fallback_default_p
 694     then
 695         echo "Error: predicate function ${function} can not have a non- multi-arch default" 1>&2
 696         kill $$
 697         exit 1
 698     fi
 699     if [ "x${invalid_p}" = "x0" -a -n "${postdefault}" ]
 700     then
 701         echo "Error: postdefault is useless when invalid_p=0" 1>&2
 702         kill $$
 703         exit 1
 704     fi
 705     if class_is_multiarch_p
 706     then
 707         if class_is_predicate_p ; then :
 708         elif test "x${predefault}" = "x"
 709         then
 710             echo "Error: pure multi-arch function ${function} must have a predefault" 1>&2
 711             kill $$
 712             exit 1
 713         fi
 714     fi
 715     echo ""
 716 done
 717
 718 exec 1>&2
 719 compare_new gdbarch.log
 720
 721
 722 copyright ()
 723 {
 724 cat <<EOF
 725 /* *INDENT-OFF* */ /* THIS FILE IS GENERATED */
 726
 727 /* Dynamic architecture support for GDB, the GNU debugger.
 728
 729    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
 730    Free Software Foundation, Inc.
 731
 732    This file is part of GDB.
 733
 734    This program is free software; you can redistribute it and/or modify
 735    it under the terms of the GNU General Public License as published by
 736    the Free Software Foundation; either version 2 of the License, or
 737    (at your option) any later version.
 738
 739    This program is distributed in the hope that it will be useful,
 740    but WITHOUT ANY WARRANTY; without even the implied warranty of
 741    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 742    GNU General Public License for more details.
 743
 744    You should have received a copy of the GNU General Public License
 745    along with this program; if not, write to the Free Software
 746    Foundation, Inc., 51 Franklin Street, Fifth Floor,
 747    Boston, MA 02110-1301, USA.  */
 748
 749 /* This file was created with the aid of \`\`gdbarch.sh''.
 750
 751    The Bourne shell script \`\`gdbarch.sh'' creates the files
 752    \`\`new-gdbarch.c'' and \`\`new-gdbarch.h and then compares them
 753    against the existing \`\`gdbarch.[hc]''.  Any differences found
 754    being reported.
 755
 756    If editing this file, please also run gdbarch.sh and merge any
 757    changes into that script. Conversely, when making sweeping changes
 758    to this file, modifying gdbarch.sh and using its output may prove
 759    easier. */
 760
 761 EOF
 762 }
 763
 764 #
 765 # The .h file
 766 #
 767
 768 exec > new-gdbarch.h
 769 copyright
 770 cat <<EOF
 771 #ifndef GDBARCH_H
 772 #define GDBARCH_H
 773
 774 struct floatformat;
 775 struct ui_file;
 776 struct frame_info;
 777 struct value;
 778 struct objfile;
 779 struct obj_section;
 780 struct minimal_symbol;
 781 struct regcache;
 782 struct reggroup;
 783 struct regset;
 784 struct disassemble_info;
 785 struct target_ops;
 786 struct obstack;
 787 struct bp_target_info;
 788 struct target_desc;
 789
 790 extern struct gdbarch *current_gdbarch;
 791 EOF
 792
 793 # function typedef's
 794 printf "\n"
 795 printf "\n"
 796 printf "/* The following are pre-initialized by GDBARCH. */\n"
 797 function_list | while do_read
 798 do
 799     if class_is_info_p
 800     then
 801         printf "\n"
 802         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 803         printf "/* set_gdbarch_${function}() - not applicable - pre-initialized. */\n"
 804         if test -n "${macro}"
 805         then
 806             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 807             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 808             printf "#endif\n"
 809             printf "#if !defined (${macro})\n"
 810             printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 811             printf "#endif\n"
 812         fi
 813     fi
 814 done
 815
 816 # function typedef's
 817 printf "\n"
 818 printf "\n"
 819 printf "/* The following are initialized by the target dependent code. */\n"
 820 function_list | while do_read
 821 do
 822     if [ -n "${comment}" ]
 823     then
 824         echo "${comment}" | sed \
 825             -e '2 s,#,/*,' \
 826             -e '3,$ s,#,  ,' \
 827             -e '$ s,$, */,'
 828     fi
 829
 830     if class_is_predicate_p
 831     then
 832         if test -n "${macro}"
 833         then
 834             printf "\n"
 835             printf "#if defined (${macro})\n"
 836             printf "/* Legacy for systems yet to multi-arch ${macro} */\n"
 837             printf "#if !defined (${macro}_P)\n"
 838             printf "#define ${macro}_P() (1)\n"
 839             printf "#endif\n"
 840             printf "#endif\n"
 841         fi
 842         printf "\n"
 843         printf "extern int gdbarch_${function}_p (struct gdbarch *gdbarch);\n"
 844         if test -n "${macro}"
 845         then
 846             printf "#if !defined (GDB_TM_FILE) && defined (${macro}_P)\n"
 847             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 848             printf "#endif\n"
 849             printf "#if !defined (${macro}_P)\n"
 850             printf "#define ${macro}_P() (gdbarch_${function}_p (current_gdbarch))\n"
 851             printf "#endif\n"
 852         fi
 853     fi
 854     if class_is_variable_p
 855     then
 856         printf "\n"
 857         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 858         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, ${returntype} ${function});\n"
 859         if test -n "${macro}"
 860         then
 861             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 862             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 863             printf "#endif\n"
 864             printf "#if !defined (${macro})\n"
 865             printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 866             printf "#endif\n"
 867         fi
 868     fi
 869     if class_is_function_p
 870     then
 871         printf "\n"
 872         if [ "x${formal}" = "xvoid" ] && class_is_multiarch_p
 873         then
 874             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch);\n"
 875         elif class_is_multiarch_p
 876         then
 877             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch, ${formal});\n"
 878         else
 879             printf "typedef ${returntype} (gdbarch_${function}_ftype) (${formal});\n"
 880         fi
 881         if [ "x${formal}" = "xvoid" ]
 882         then
 883           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 884         else
 885           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch, ${formal});\n"
 886         fi
 887         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, gdbarch_${function}_ftype *${function});\n"
 888         if test -n "${macro}"
 889         then
 890             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 891             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 892             printf "#endif\n"
 893             if [ "x${actual}" = "x" ]
 894             then
 895                 d="#define ${macro}() (gdbarch_${function} (current_gdbarch))"
 896             elif [ "x${actual}" = "x-" ]
 897             then
 898                 d="#define ${macro} (gdbarch_${function} (current_gdbarch))"
 899             else
 900                 d="#define ${macro}(${actual}) (gdbarch_${function} (current_gdbarch, ${actual}))"
 901             fi
 902             printf "#if !defined (${macro})\n"
 903             if [ "x${actual}" = "x" ]
 904             then
 905                 printf "#define ${macro}() (gdbarch_${function} (current_gdbarch))\n"
 906             elif [ "x${actual}" = "x-" ]
 907             then
 908                 printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 909             else
 910                 printf "#define ${macro}(${actual}) (gdbarch_${function} (current_gdbarch, ${actual}))\n"
 911             fi
 912             printf "#endif\n"
 913         fi
 914     fi
 915 done
 916
 917 # close it off
 918 cat <<EOF
 919
 920 extern struct gdbarch_tdep *gdbarch_tdep (struct gdbarch *gdbarch);
 921
 922
 923 /* Mechanism for co-ordinating the selection of a specific
 924    architecture.
 925
 926    GDB targets (*-tdep.c) can register an interest in a specific
 927    architecture.  Other GDB components can register a need to maintain
 928    per-architecture data.
 929
 930    The mechanisms below ensures that there is only a loose connection
 931    between the set-architecture command and the various GDB
 932    components.  Each component can independently register their need
 933    to maintain architecture specific data with gdbarch.
 934
 935    Pragmatics:
 936
 937    Previously, a single TARGET_ARCHITECTURE_HOOK was provided.  It
 938    didn't scale.
 939
 940    The more traditional mega-struct containing architecture specific
 941    data for all the various GDB components was also considered.  Since
 942    GDB is built from a variable number of (fairly independent)
 943    components it was determined that the global aproach was not
 944    applicable. */
 945
 946
 947 /* Register a new architectural family with GDB.
 948
 949    Register support for the specified ARCHITECTURE with GDB.  When
 950    gdbarch determines that the specified architecture has been
 951    selected, the corresponding INIT function is called.
 952
 953    --
 954
 955    The INIT function takes two parameters: INFO which contains the
 956    information available to gdbarch about the (possibly new)
 957    architecture; ARCHES which is a list of the previously created
 958    \`\`struct gdbarch'' for this architecture.
 959
 960    The INFO parameter is, as far as possible, be pre-initialized with
 961    information obtained from INFO.ABFD or the global defaults.
 962
 963    The ARCHES parameter is a linked list (sorted most recently used)
 964    of all the previously created architures for this architecture
 965    family.  The (possibly NULL) ARCHES->gdbarch can used to access
 966    values from the previously selected architecture for this
 967    architecture family.  The global \`\`current_gdbarch'' shall not be
 968    used.
 969
 970    The INIT function shall return any of: NULL - indicating that it
 971    doesn't recognize the selected architecture; an existing \`\`struct
 972    gdbarch'' from the ARCHES list - indicating that the new
 973    architecture is just a synonym for an earlier architecture (see
 974    gdbarch_list_lookup_by_info()); a newly created \`\`struct gdbarch''
 975    - that describes the selected architecture (see gdbarch_alloc()).
 976
 977    The DUMP_TDEP function shall print out all target specific values.
 978    Care should be taken to ensure that the function works in both the
 979    multi-arch and non- multi-arch cases. */
 980
 981 struct gdbarch_list
 982 {
 983   struct gdbarch *gdbarch;
 984   struct gdbarch_list *next;
 985 };
 986
 987 struct gdbarch_info
 988 {
 989   /* Use default: NULL (ZERO). */
 990   const struct bfd_arch_info *bfd_arch_info;
 991
 992   /* Use default: BFD_ENDIAN_UNKNOWN (NB: is not ZERO).  */
 993   int byte_order;
 994
 995   /* Use default: NULL (ZERO). */
 996   bfd *abfd;
 997
 998   /* Use default: NULL (ZERO). */
 999   struct gdbarch_tdep_info *tdep_info;
1000
1001   /* Use default: GDB_OSABI_UNINITIALIZED (-1).  */
1002   enum gdb_osabi osabi;
1003
1004   /* Use default: NULL (ZERO).  */
1005   const struct target_desc *target_desc;
1006 };
1007
1008 typedef struct gdbarch *(gdbarch_init_ftype) (struct gdbarch_info info, struct gdbarch_list *arches);
1009 typedef void (gdbarch_dump_tdep_ftype) (struct gdbarch *gdbarch, struct ui_file *file);
1010
1011 /* DEPRECATED - use gdbarch_register() */
1012 extern void register_gdbarch_init (enum bfd_architecture architecture, gdbarch_init_ftype *);
1013
1014 extern void gdbarch_register (enum bfd_architecture architecture,
1015                               gdbarch_init_ftype *,
1016                               gdbarch_dump_tdep_ftype *);
1017
1018
1019 /* Return a freshly allocated, NULL terminated, array of the valid
1020    architecture names.  Since architectures are registered during the
1021    _initialize phase this function only returns useful information
1022    once initialization has been completed. */
1023
1024 extern const char **gdbarch_printable_names (void);
1025
1026
1027 /* Helper function.  Search the list of ARCHES for a GDBARCH that
1028    matches the information provided by INFO. */
1029
1030 extern struct gdbarch_list *gdbarch_list_lookup_by_info (struct gdbarch_list *arches, const struct gdbarch_info *info);
1031
1032
1033 /* Helper function.  Create a preliminary \`\`struct gdbarch''.  Perform
1034    basic initialization using values obtained from the INFO and TDEP
1035    parameters.  set_gdbarch_*() functions are called to complete the
1036    initialization of the object. */
1037
1038 extern struct gdbarch *gdbarch_alloc (const struct gdbarch_info *info, struct gdbarch_tdep *tdep);
1039
1040
1041 /* Helper function.  Free a partially-constructed \`\`struct gdbarch''.
1042    It is assumed that the caller freeds the \`\`struct
1043    gdbarch_tdep''. */
1044
1045 extern void gdbarch_free (struct gdbarch *);
1046
1047
1048 /* Helper function.  Allocate memory from the \`\`struct gdbarch''
1049    obstack.  The memory is freed when the corresponding architecture
1050    is also freed.  */
1051
1052 extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
1053 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
1054 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
1055
1056
1057 /* Helper function. Force an update of the current architecture.
1058
1059    The actual architecture selected is determined by INFO, \`\`(gdb) set
1060    architecture'' et.al., the existing architecture and BFD's default
1061    architecture.  INFO should be initialized to zero and then selected
1062    fields should be updated.
1063
1064    Returns non-zero if the update succeeds */
1065
1066 extern int gdbarch_update_p (struct gdbarch_info info);
1067
1068
1069 /* Helper function.  Find an architecture matching info.
1070
1071    INFO should be initialized using gdbarch_info_init, relevant fields
1072    set, and then finished using gdbarch_info_fill.
1073
1074    Returns the corresponding architecture, or NULL if no matching
1075    architecture was found.  "current_gdbarch" is not updated.  */
1076
1077 extern struct gdbarch *gdbarch_find_by_info (struct gdbarch_info info);
1078
1079
1080 /* Helper function.  Set the global "current_gdbarch" to "gdbarch".
1081
1082    FIXME: kettenis/20031124: Of the functions that follow, only
1083    gdbarch_from_bfd is supposed to survive.  The others will
1084    dissappear since in the future GDB will (hopefully) be truly
1085    multi-arch.  However, for now we're still stuck with the concept of
1086    a single active architecture.  */
1087
1088 extern void deprecated_current_gdbarch_select_hack (struct gdbarch *gdbarch);
1089
1090
1091 /* Register per-architecture data-pointer.
1092
1093    Reserve space for a per-architecture data-pointer.  An identifier
1094    for the reserved data-pointer is returned.  That identifer should
1095    be saved in a local static variable.
1096
1097    Memory for the per-architecture data shall be allocated using
1098    gdbarch_obstack_zalloc.  That memory will be deleted when the
1099    corresponding architecture object is deleted.
1100
1101    When a previously created architecture is re-selected, the
1102    per-architecture data-pointer for that previous architecture is
1103    restored.  INIT() is not re-called.
1104
1105    Multiple registrarants for any architecture are allowed (and
1106    strongly encouraged).  */
1107
1108 struct gdbarch_data;
1109
1110 typedef void *(gdbarch_data_pre_init_ftype) (struct obstack *obstack);
1111 extern struct gdbarch_data *gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *init);
1112 typedef void *(gdbarch_data_post_init_ftype) (struct gdbarch *gdbarch);
1113 extern struct gdbarch_data *gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *init);
1114 extern void deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1115                                          struct gdbarch_data *data,
1116                                          void *pointer);
1117
1118 extern void *gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *);
1119
1120
1121
1122 /* Register per-architecture memory region.
1123
1124    Provide a memory-region swap mechanism.  Per-architecture memory
1125    region are created.  These memory regions are swapped whenever the
1126    architecture is changed.  For a new architecture, the memory region
1127    is initialized with zero (0) and the INIT function is called.
1128
1129    Memory regions are swapped / initialized in the order that they are
1130    registered.  NULL DATA and/or INIT values can be specified.
1131
1132    New code should use gdbarch_data_register_*(). */
1133
1134 typedef void (gdbarch_swap_ftype) (void);
1135 extern void deprecated_register_gdbarch_swap (void *data, unsigned long size, gdbarch_swap_ftype *init);
1136 #define DEPRECATED_REGISTER_GDBARCH_SWAP(VAR) deprecated_register_gdbarch_swap (&(VAR), sizeof ((VAR)), NULL)
1137
1138
1139
1140 /* Set the dynamic target-system-dependent parameters (architecture,
1141    byte-order, ...) using information found in the BFD */
1142
1143 extern void set_gdbarch_from_file (bfd *);
1144
1145
1146 /* Initialize the current architecture to the "first" one we find on
1147    our list.  */
1148
1149 extern void initialize_current_architecture (void);
1150
1151 /* gdbarch trace variable */
1152 extern int gdbarch_debug;
1153
1154 extern void gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file);
1155
1156 #endif
1157 EOF
1158 exec 1>&2
1159 #../move-if-change new-gdbarch.h gdbarch.h
1160 compare_new gdbarch.h
1161
1162
1163 #
1164 # C file
1165 #
1166
1167 exec > new-gdbarch.c
1168 copyright
1169 cat <<EOF
1170
1171 #include "defs.h"
1172 #include "arch-utils.h"
1173
1174 #include "gdbcmd.h"
1175 #include "inferior.h"
1176 #include "symcat.h"
1177
1178 #include "floatformat.h"
1179
1180 #include "gdb_assert.h"
1181 #include "gdb_string.h"
1182 #include "gdb-events.h"
1183 #include "reggroups.h"
1184 #include "osabi.h"
1185 #include "gdb_obstack.h"
1186
1187 /* Static function declarations */
1188
1189 static void alloc_gdbarch_data (struct gdbarch *);
1190
1191 /* Non-zero if we want to trace architecture code.  */
1192
1193 #ifndef GDBARCH_DEBUG
1194 #define GDBARCH_DEBUG 0
1195 #endif
1196 int gdbarch_debug = GDBARCH_DEBUG;
1197 static void
1198 show_gdbarch_debug (struct ui_file *file, int from_tty,
1199                     struct cmd_list_element *c, const char *value)
1200 {
1201   fprintf_filtered (file, _("Architecture debugging is %s.\\n"), value);
1202 }
1203
1204 static const char *
1205 pformat (const struct floatformat **format)
1206 {
1207   if (format == NULL)
1208     return "(null)";
1209   else
1210     /* Just print out one of them - this is only for diagnostics.  */
1211     return format[0]->name;
1212 }
1213
1214 EOF
1215
1216 # gdbarch open the gdbarch object
1217 printf "\n"
1218 printf "/* Maintain the struct gdbarch object */\n"
1219 printf "\n"
1220 printf "struct gdbarch\n"
1221 printf "{\n"
1222 printf "  /* Has this architecture been fully initialized?  */\n"
1223 printf "  int initialized_p;\n"
1224 printf "\n"
1225 printf "  /* An obstack bound to the lifetime of the architecture.  */\n"
1226 printf "  struct obstack *obstack;\n"
1227 printf "\n"
1228 printf "  /* basic architectural information */\n"
1229 function_list | while do_read
1230 do
1231     if class_is_info_p
1232     then
1233         printf "  ${returntype} ${function};\n"
1234     fi
1235 done
1236 printf "\n"
1237 printf "  /* target specific vector. */\n"
1238 printf "  struct gdbarch_tdep *tdep;\n"
1239 printf "  gdbarch_dump_tdep_ftype *dump_tdep;\n"
1240 printf "\n"
1241 printf "  /* per-architecture data-pointers */\n"
1242 printf "  unsigned nr_data;\n"
1243 printf "  void **data;\n"
1244 printf "\n"
1245 printf "  /* per-architecture swap-regions */\n"
1246 printf "  struct gdbarch_swap *swap;\n"
1247 printf "\n"
1248 cat <<EOF
1249   /* Multi-arch values.
1250
1251      When extending this structure you must:
1252
1253      Add the field below.
1254
1255      Declare set/get functions and define the corresponding
1256      macro in gdbarch.h.
1257
1258      gdbarch_alloc(): If zero/NULL is not a suitable default,
1259      initialize the new field.
1260
1261      verify_gdbarch(): Confirm that the target updated the field
1262      correctly.
1263
1264      gdbarch_dump(): Add a fprintf_unfiltered call so that the new
1265      field is dumped out
1266
1267      \`\`startup_gdbarch()'': Append an initial value to the static
1268      variable (base values on the host's c-type system).
1269
1270      get_gdbarch(): Implement the set/get functions (probably using
1271      the macro's as shortcuts).
1272
1273      */
1274
1275 EOF
1276 function_list | while do_read
1277 do
1278     if class_is_variable_p
1279     then
1280         printf "  ${returntype} ${function};\n"
1281     elif class_is_function_p
1282     then
1283         printf "  gdbarch_${function}_ftype *${function};\n"
1284     fi
1285 done
1286 printf "};\n"
1287
1288 # A pre-initialized vector
1289 printf "\n"
1290 printf "\n"
1291 cat <<EOF
1292 /* The default architecture uses host values (for want of a better
1293    choice). */
1294 EOF
1295 printf "\n"
1296 printf "extern const struct bfd_arch_info bfd_default_arch_struct;\n"
1297 printf "\n"
1298 printf "struct gdbarch startup_gdbarch =\n"
1299 printf "{\n"
1300 printf "  1, /* Always initialized.  */\n"
1301 printf "  NULL, /* The obstack.  */\n"
1302 printf "  /* basic architecture information */\n"
1303 function_list | while do_read
1304 do
1305     if class_is_info_p
1306     then
1307         printf "  ${staticdefault},  /* ${function} */\n"
1308     fi
1309 done
1310 cat <<EOF
1311   /* target specific vector and its dump routine */
1312   NULL, NULL,
1313   /*per-architecture data-pointers and swap regions */
1314   0, NULL, NULL,
1315   /* Multi-arch values */
1316 EOF
1317 function_list | while do_read
1318 do
1319     if class_is_function_p || class_is_variable_p
1320     then
1321         printf "  ${staticdefault},  /* ${function} */\n"
1322     fi
1323 done
1324 cat <<EOF
1325   /* startup_gdbarch() */
1326 };
1327
1328 struct gdbarch *current_gdbarch = &startup_gdbarch;
1329 EOF
1330
1331 # Create a new gdbarch struct
1332 cat <<EOF
1333
1334 /* Create a new \`\`struct gdbarch'' based on information provided by
1335    \`\`struct gdbarch_info''. */
1336 EOF
1337 printf "\n"
1338 cat <<EOF
1339 struct gdbarch *
1340 gdbarch_alloc (const struct gdbarch_info *info,
1341                struct gdbarch_tdep *tdep)
1342 {
1343   /* NOTE: The new architecture variable is named \`\`current_gdbarch''
1344      so that macros such as TARGET_ARCHITECTURE, when expanded, refer to
1345      the current local architecture and not the previous global
1346      architecture.  This ensures that the new architectures initial
1347      values are not influenced by the previous architecture.  Once
1348      everything is parameterised with gdbarch, this will go away.  */
1349   struct gdbarch *current_gdbarch;
1350
1351   /* Create an obstack for allocating all the per-architecture memory,
1352      then use that to allocate the architecture vector.  */
1353   struct obstack *obstack = XMALLOC (struct obstack);
1354   obstack_init (obstack);
1355   current_gdbarch = obstack_alloc (obstack, sizeof (*current_gdbarch));
1356   memset (current_gdbarch, 0, sizeof (*current_gdbarch));
1357   current_gdbarch->obstack = obstack;
1358
1359   alloc_gdbarch_data (current_gdbarch);
1360
1361   current_gdbarch->tdep = tdep;
1362 EOF
1363 printf "\n"
1364 function_list | while do_read
1365 do
1366     if class_is_info_p
1367     then
1368         printf "  current_gdbarch->${function} = info->${function};\n"
1369     fi
1370 done
1371 printf "\n"
1372 printf "  /* Force the explicit initialization of these. */\n"
1373 function_list | while do_read
1374 do
1375     if class_is_function_p || class_is_variable_p
1376     then
1377         if [ -n "${predefault}" -a "x${predefault}" != "x0" ]
1378         then
1379           printf "  current_gdbarch->${function} = ${predefault};\n"
1380         fi
1381     fi
1382 done
1383 cat <<EOF
1384   /* gdbarch_alloc() */
1385
1386   return current_gdbarch;
1387 }
1388 EOF
1389
1390 # Free a gdbarch struct.
1391 printf "\n"
1392 printf "\n"
1393 cat <<EOF
1394 /* Allocate extra space using the per-architecture obstack.  */
1395
1396 void *
1397 gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
1398 {
1399   void *data = obstack_alloc (arch->obstack, size);
1400   memset (data, 0, size);
1401   return data;
1402 }
1403
1404
1405 /* Free a gdbarch struct.  This should never happen in normal
1406    operation --- once you've created a gdbarch, you keep it around.
1407    However, if an architecture's init function encounters an error
1408    building the structure, it may need to clean up a partially
1409    constructed gdbarch.  */
1410
1411 void
1412 gdbarch_free (struct gdbarch *arch)
1413 {
1414   struct obstack *obstack;
1415   gdb_assert (arch != NULL);
1416   gdb_assert (!arch->initialized_p);
1417   obstack = arch->obstack;
1418   obstack_free (obstack, 0); /* Includes the ARCH.  */
1419   xfree (obstack);
1420 }
1421 EOF
1422
1423 # verify a new architecture
1424 cat <<EOF
1425
1426
1427 /* Ensure that all values in a GDBARCH are reasonable.  */
1428
1429 /* NOTE/WARNING: The parameter is called \`\`current_gdbarch'' so that it
1430    just happens to match the global variable \`\`current_gdbarch''.  That
1431    way macros refering to that variable get the local and not the global
1432    version - ulgh.  Once everything is parameterised with gdbarch, this
1433    will go away. */
1434
1435 static void
1436 verify_gdbarch (struct gdbarch *current_gdbarch)
1437 {
1438   struct ui_file *log;
1439   struct cleanup *cleanups;
1440   long dummy;
1441   char *buf;
1442   log = mem_fileopen ();
1443   cleanups = make_cleanup_ui_file_delete (log);
1444   /* fundamental */
1445   if (current_gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)
1446     fprintf_unfiltered (log, "\n\tbyte-order");
1447   if (current_gdbarch->bfd_arch_info == NULL)
1448     fprintf_unfiltered (log, "\n\tbfd_arch_info");
1449   /* Check those that need to be defined for the given multi-arch level. */
1450 EOF
1451 function_list | while do_read
1452 do
1453     if class_is_function_p || class_is_variable_p
1454     then
1455         if [ "x${invalid_p}" = "x0" ]
1456         then
1457             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1458         elif class_is_predicate_p
1459         then
1460             printf "  /* Skip verify of ${function}, has predicate */\n"
1461         # FIXME: See do_read for potential simplification
1462         elif [ -n "${invalid_p}" -a -n "${postdefault}" ]
1463         then
1464             printf "  if (${invalid_p})\n"
1465             printf "    current_gdbarch->${function} = ${postdefault};\n"
1466         elif [ -n "${predefault}" -a -n "${postdefault}" ]
1467         then
1468             printf "  if (current_gdbarch->${function} == ${predefault})\n"
1469             printf "    current_gdbarch->${function} = ${postdefault};\n"
1470         elif [ -n "${postdefault}" ]
1471         then
1472             printf "  if (current_gdbarch->${function} == 0)\n"
1473             printf "    current_gdbarch->${function} = ${postdefault};\n"
1474         elif [ -n "${invalid_p}" ]
1475         then
1476             printf "  if (${invalid_p})\n"
1477             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1478         elif [ -n "${predefault}" ]
1479         then
1480             printf "  if (current_gdbarch->${function} == ${predefault})\n"
1481             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1482         fi
1483     fi
1484 done
1485 cat <<EOF
1486   buf = ui_file_xstrdup (log, &dummy);
1487   make_cleanup (xfree, buf);
1488   if (strlen (buf) > 0)
1489     internal_error (__FILE__, __LINE__,
1490                     _("verify_gdbarch: the following are invalid ...%s"),
1491                     buf);
1492   do_cleanups (cleanups);
1493 }
1494 EOF
1495
1496 # dump the structure
1497 printf "\n"
1498 printf "\n"
1499 cat <<EOF
1500 /* Print out the details of the current architecture. */
1501
1502 /* NOTE/WARNING: The parameter is called \`\`current_gdbarch'' so that it
1503    just happens to match the global variable \`\`current_gdbarch''.  That
1504    way macros refering to that variable get the local and not the global
1505    version - ulgh.  Once everything is parameterised with gdbarch, this
1506    will go away. */
1507
1508 void
1509 gdbarch_dump (struct gdbarch *current_gdbarch, struct ui_file *file)
1510 {
1511   const char *gdb_xm_file = "<not-defined>";
1512   const char *gdb_nm_file = "<not-defined>";
1513   const char *gdb_tm_file = "<not-defined>";
1514 #if defined (GDB_XM_FILE)
1515   gdb_xm_file = GDB_XM_FILE;
1516 #endif
1517   fprintf_unfiltered (file,
1518                       "gdbarch_dump: GDB_XM_FILE = %s\\n",
1519                       gdb_xm_file);
1520 #if defined (GDB_NM_FILE)
1521   gdb_nm_file = GDB_NM_FILE;
1522 #endif
1523   fprintf_unfiltered (file,
1524                       "gdbarch_dump: GDB_NM_FILE = %s\\n",
1525                       gdb_nm_file);
1526 #if defined (GDB_TM_FILE)
1527   gdb_tm_file = GDB_TM_FILE;
1528 #endif
1529   fprintf_unfiltered (file,
1530                       "gdbarch_dump: GDB_TM_FILE = %s\\n",
1531                       gdb_tm_file);
1532 EOF
1533 function_list | sort -t: -k 4 | while do_read
1534 do
1535     # First the predicate
1536     if class_is_predicate_p
1537     then
1538         if test -n "${macro}"
1539         then
1540             printf "#ifdef ${macro}_P\n"
1541             printf "  fprintf_unfiltered (file,\n"
1542             printf "                      \"gdbarch_dump: %%s # %%s\\\\n\",\n"
1543             printf "                      \"${macro}_P()\",\n"
1544             printf "                      XSTRING (${macro}_P ()));\n"
1545             printf "#endif\n"
1546         fi
1547         printf "  fprintf_unfiltered (file,\n"
1548         printf "                      \"gdbarch_dump: gdbarch_${function}_p() = %%d\\\\n\",\n"
1549         printf "                      gdbarch_${function}_p (current_gdbarch));\n"
1550     fi
1551     # Print the macro definition.
1552     if test -n "${macro}"
1553     then
1554         printf "#ifdef ${macro}\n"
1555         if class_is_function_p
1556         then
1557             printf "  fprintf_unfiltered (file,\n"
1558             printf "                      \"gdbarch_dump: %%s # %%s\\\\n\",\n"
1559             printf "                      \"${macro}(${actual})\",\n"
1560             printf "                      XSTRING (${macro} (${actual})));\n"
1561         else
1562             printf "  fprintf_unfiltered (file,\n"
1563             printf "                      \"gdbarch_dump: ${macro} # %%s\\\\n\",\n"
1564             printf "                      XSTRING (${macro}));\n"
1565         fi
1566         printf "#endif\n"
1567     fi
1568     # Print the corresponding value.
1569     if class_is_function_p
1570     then
1571         printf "  fprintf_unfiltered (file,\n"
1572         printf "                      \"gdbarch_dump: ${function} = <0x%%lx>\\\\n\",\n"
1573         printf "                      (long) current_gdbarch->${function});\n"
1574     else
1575         # It is a variable
1576         case "${print}:${returntype}" in
1577             :CORE_ADDR )
1578                 fmt="0x%s"
1579                 print="paddr_nz (current_gdbarch->${function})"
1580                 ;;
1581             :* )
1582                 fmt="%s"
1583                 print="paddr_d (current_gdbarch->${function})"
1584                 ;;
1585             * )
1586                 fmt="%s"
1587                 ;;
1588         esac
1589         printf "  fprintf_unfiltered (file,\n"
1590         printf "                      \"gdbarch_dump: ${function} = %s\\\\n\",\n" "${fmt}"
1591         printf "                      ${print});\n"
1592     fi
1593 done
1594 cat <<EOF
1595   if (current_gdbarch->dump_tdep != NULL)
1596     current_gdbarch->dump_tdep (current_gdbarch, file);
1597 }
1598 EOF
1599
1600
1601 # GET/SET
1602 printf "\n"
1603 cat <<EOF
1604 struct gdbarch_tdep *
1605 gdbarch_tdep (struct gdbarch *gdbarch)
1606 {
1607   if (gdbarch_debug >= 2)
1608     fprintf_unfiltered (gdb_stdlog, "gdbarch_tdep called\\n");
1609   return gdbarch->tdep;
1610 }
1611 EOF
1612 printf "\n"
1613 function_list | while do_read
1614 do
1615     if class_is_predicate_p
1616     then
1617         printf "\n"
1618         printf "int\n"
1619         printf "gdbarch_${function}_p (struct gdbarch *gdbarch)\n"
1620         printf "{\n"
1621         printf "  gdb_assert (gdbarch != NULL);\n"
1622         printf "  return ${predicate};\n"
1623         printf "}\n"
1624     fi
1625     if class_is_function_p
1626     then
1627         printf "\n"
1628         printf "${returntype}\n"
1629         if [ "x${formal}" = "xvoid" ]
1630         then
1631           printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1632         else
1633           printf "gdbarch_${function} (struct gdbarch *gdbarch, ${formal})\n"
1634         fi
1635         printf "{\n"
1636         printf "  gdb_assert (gdbarch != NULL);\n"
1637         printf "  gdb_assert (gdbarch->${function} != NULL);\n"
1638         if class_is_predicate_p && test -n "${predefault}"
1639         then
1640             # Allow a call to a function with a predicate.
1641             printf "  /* Do not check predicate: ${predicate}, allow call.  */\n"
1642         fi
1643         printf "  if (gdbarch_debug >= 2)\n"
1644         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1645         if [ "x${actual}" = "x-" -o "x${actual}" = "x" ]
1646         then
1647             if class_is_multiarch_p
1648             then
1649                 params="gdbarch"
1650             else
1651                 params=""
1652             fi
1653         else
1654             if class_is_multiarch_p
1655             then
1656                 params="gdbarch, ${actual}"
1657             else
1658                 params="${actual}"
1659             fi
1660         fi
1661         if [ "x${returntype}" = "xvoid" ]
1662         then
1663           printf "  gdbarch->${function} (${params});\n"
1664         else
1665           printf "  return gdbarch->${function} (${params});\n"
1666         fi
1667         printf "}\n"
1668         printf "\n"
1669         printf "void\n"
1670         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1671         printf "            `echo ${function} | sed -e 's/./ /g'`  gdbarch_${function}_ftype ${function})\n"
1672         printf "{\n"
1673         printf "  gdbarch->${function} = ${function};\n"
1674         printf "}\n"
1675     elif class_is_variable_p
1676     then
1677         printf "\n"
1678         printf "${returntype}\n"
1679         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1680         printf "{\n"
1681         printf "  gdb_assert (gdbarch != NULL);\n"
1682         if [ "x${invalid_p}" = "x0" ]
1683         then
1684             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1685         elif [ -n "${invalid_p}" ]
1686         then
1687             printf "  /* Check variable is valid.  */\n"
1688             printf "  gdb_assert (!(${invalid_p}));\n"
1689         elif [ -n "${predefault}" ]
1690         then
1691             printf "  /* Check variable changed from pre-default.  */\n"
1692             printf "  gdb_assert (gdbarch->${function} != ${predefault});\n"
1693         fi
1694         printf "  if (gdbarch_debug >= 2)\n"
1695         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1696         printf "  return gdbarch->${function};\n"
1697         printf "}\n"
1698         printf "\n"
1699         printf "void\n"
1700         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1701         printf "            `echo ${function} | sed -e 's/./ /g'`  ${returntype} ${function})\n"
1702         printf "{\n"
1703         printf "  gdbarch->${function} = ${function};\n"
1704         printf "}\n"
1705     elif class_is_info_p
1706     then
1707         printf "\n"
1708         printf "${returntype}\n"
1709         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1710         printf "{\n"
1711         printf "  gdb_assert (gdbarch != NULL);\n"
1712         printf "  if (gdbarch_debug >= 2)\n"
1713         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1714         printf "  return gdbarch->${function};\n"
1715         printf "}\n"
1716     fi
1717 done
1718
1719 # All the trailing guff
1720 cat <<EOF
1721
1722
1723 /* Keep a registry of per-architecture data-pointers required by GDB
1724    modules. */
1725
1726 struct gdbarch_data
1727 {
1728   unsigned index;
1729   int init_p;
1730   gdbarch_data_pre_init_ftype *pre_init;
1731   gdbarch_data_post_init_ftype *post_init;
1732 };
1733
1734 struct gdbarch_data_registration
1735 {
1736   struct gdbarch_data *data;
1737   struct gdbarch_data_registration *next;
1738 };
1739
1740 struct gdbarch_data_registry
1741 {
1742   unsigned nr;
1743   struct gdbarch_data_registration *registrations;
1744 };
1745
1746 struct gdbarch_data_registry gdbarch_data_registry =
1747 {
1748   0, NULL,
1749 };
1750
1751 static struct gdbarch_data *
1752 gdbarch_data_register (gdbarch_data_pre_init_ftype *pre_init,
1753                        gdbarch_data_post_init_ftype *post_init)
1754 {
1755   struct gdbarch_data_registration **curr;
1756   /* Append the new registraration.  */
1757   for (curr = &gdbarch_data_registry.registrations;
1758        (*curr) != NULL;
1759        curr = &(*curr)->next);
1760   (*curr) = XMALLOC (struct gdbarch_data_registration);
1761   (*curr)->next = NULL;
1762   (*curr)->data = XMALLOC (struct gdbarch_data);
1763   (*curr)->data->index = gdbarch_data_registry.nr++;
1764   (*curr)->data->pre_init = pre_init;
1765   (*curr)->data->post_init = post_init;
1766   (*curr)->data->init_p = 1;
1767   return (*curr)->data;
1768 }
1769
1770 struct gdbarch_data *
1771 gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *pre_init)
1772 {
1773   return gdbarch_data_register (pre_init, NULL);
1774 }
1775
1776 struct gdbarch_data *
1777 gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *post_init)
1778 {
1779   return gdbarch_data_register (NULL, post_init);
1780 }
1781
1782 /* Create/delete the gdbarch data vector. */
1783
1784 static void
1785 alloc_gdbarch_data (struct gdbarch *gdbarch)
1786 {
1787   gdb_assert (gdbarch->data == NULL);
1788   gdbarch->nr_data = gdbarch_data_registry.nr;
1789   gdbarch->data = GDBARCH_OBSTACK_CALLOC (gdbarch, gdbarch->nr_data, void *);
1790 }
1791
1792 /* Initialize the current value of the specified per-architecture
1793    data-pointer. */
1794
1795 void
1796 deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1797                              struct gdbarch_data *data,
1798                              void *pointer)
1799 {
1800   gdb_assert (data->index < gdbarch->nr_data);
1801   gdb_assert (gdbarch->data[data->index] == NULL);
1802   gdb_assert (data->pre_init == NULL);
1803   gdbarch->data[data->index] = pointer;
1804 }
1805
1806 /* Return the current value of the specified per-architecture
1807    data-pointer. */
1808
1809 void *
1810 gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *data)
1811 {
1812   gdb_assert (data->index < gdbarch->nr_data);
1813   if (gdbarch->data[data->index] == NULL)
1814     {
1815       /* The data-pointer isn't initialized, call init() to get a
1816          value.  */
1817       if (data->pre_init != NULL)
1818         /* Mid architecture creation: pass just the obstack, and not
1819            the entire architecture, as that way it isn't possible for
1820            pre-init code to refer to undefined architecture
1821            fields.  */
1822         gdbarch->data[data->index] = data->pre_init (gdbarch->obstack);
1823       else if (gdbarch->initialized_p
1824                && data->post_init != NULL)
1825         /* Post architecture creation: pass the entire architecture
1826            (as all fields are valid), but be careful to also detect
1827            recursive references.  */
1828         {
1829           gdb_assert (data->init_p);
1830           data->init_p = 0;
1831           gdbarch->data[data->index] = data->post_init (gdbarch);
1832           data->init_p = 1;
1833         }
1834       else
1835         /* The architecture initialization hasn't completed - punt -
1836          hope that the caller knows what they are doing.  Once
1837          deprecated_set_gdbarch_data has been initialized, this can be
1838          changed to an internal error.  */
1839         return NULL;
1840       gdb_assert (gdbarch->data[data->index] != NULL);
1841     }
1842   return gdbarch->data[data->index];
1843 }
1844
1845
1846
1847 /* Keep a registry of swapped data required by GDB modules. */
1848
1849 struct gdbarch_swap
1850 {
1851   void *swap;
1852   struct gdbarch_swap_registration *source;
1853   struct gdbarch_swap *next;
1854 };
1855
1856 struct gdbarch_swap_registration
1857 {
1858   void *data;
1859   unsigned long sizeof_data;
1860   gdbarch_swap_ftype *init;
1861   struct gdbarch_swap_registration *next;
1862 };
1863
1864 struct gdbarch_swap_registry
1865 {
1866   int nr;
1867   struct gdbarch_swap_registration *registrations;
1868 };
1869
1870 struct gdbarch_swap_registry gdbarch_swap_registry =
1871 {
1872   0, NULL,
1873 };
1874
1875 void
1876 deprecated_register_gdbarch_swap (void *data,
1877                                   unsigned long sizeof_data,
1878                                   gdbarch_swap_ftype *init)
1879 {
1880   struct gdbarch_swap_registration **rego;
1881   for (rego = &gdbarch_swap_registry.registrations;
1882        (*rego) != NULL;
1883        rego = &(*rego)->next);
1884   (*rego) = XMALLOC (struct gdbarch_swap_registration);
1885   (*rego)->next = NULL;
1886   (*rego)->init = init;
1887   (*rego)->data = data;
1888   (*rego)->sizeof_data = sizeof_data;
1889 }
1890
1891 static void
1892 current_gdbarch_swap_init_hack (void)
1893 {
1894   struct gdbarch_swap_registration *rego;
1895   struct gdbarch_swap **curr = &current_gdbarch->swap;
1896   for (rego = gdbarch_swap_registry.registrations;
1897        rego != NULL;
1898        rego = rego->next)
1899     {
1900       if (rego->data != NULL)
1901         {
1902           (*curr) = GDBARCH_OBSTACK_ZALLOC (current_gdbarch,
1903                                             struct gdbarch_swap);
1904           (*curr)->source = rego;
1905           (*curr)->swap = gdbarch_obstack_zalloc (current_gdbarch,
1906                                                   rego->sizeof_data);
1907           (*curr)->next = NULL;
1908           curr = &(*curr)->next;
1909         }
1910       if (rego->init != NULL)
1911         rego->init ();
1912     }
1913 }
1914
1915 static struct gdbarch *
1916 current_gdbarch_swap_out_hack (void)
1917 {
1918   struct gdbarch *old_gdbarch = current_gdbarch;
1919   struct gdbarch_swap *curr;
1920
1921   gdb_assert (old_gdbarch != NULL);
1922   for (curr = old_gdbarch->swap;
1923        curr != NULL;
1924        curr = curr->next)
1925     {
1926       memcpy (curr->swap, curr->source->data, curr->source->sizeof_data);
1927       memset (curr->source->data, 0, curr->source->sizeof_data);
1928     }
1929   current_gdbarch = NULL;
1930   return old_gdbarch;
1931 }
1932
1933 static void
1934 current_gdbarch_swap_in_hack (struct gdbarch *new_gdbarch)
1935 {
1936   struct gdbarch_swap *curr;
1937
1938   gdb_assert (current_gdbarch == NULL);
1939   for (curr = new_gdbarch->swap;
1940        curr != NULL;
1941        curr = curr->next)
1942     memcpy (curr->source->data, curr->swap, curr->source->sizeof_data);
1943   current_gdbarch = new_gdbarch;
1944 }
1945
1946
1947 /* Keep a registry of the architectures known by GDB. */
1948
1949 struct gdbarch_registration
1950 {
1951   enum bfd_architecture bfd_architecture;
1952   gdbarch_init_ftype *init;
1953   gdbarch_dump_tdep_ftype *dump_tdep;
1954   struct gdbarch_list *arches;
1955   struct gdbarch_registration *next;
1956 };
1957
1958 static struct gdbarch_registration *gdbarch_registry = NULL;
1959
1960 static void
1961 append_name (const char ***buf, int *nr, const char *name)
1962 {
1963   *buf = xrealloc (*buf, sizeof (char**) * (*nr + 1));
1964   (*buf)[*nr] = name;
1965   *nr += 1;
1966 }
1967
1968 const char **
1969 gdbarch_printable_names (void)
1970 {
1971   /* Accumulate a list of names based on the registed list of
1972      architectures. */
1973   enum bfd_architecture a;
1974   int nr_arches = 0;
1975   const char **arches = NULL;
1976   struct gdbarch_registration *rego;
1977   for (rego = gdbarch_registry;
1978        rego != NULL;
1979        rego = rego->next)
1980     {
1981       const struct bfd_arch_info *ap;
1982       ap = bfd_lookup_arch (rego->bfd_architecture, 0);
1983       if (ap == NULL)
1984         internal_error (__FILE__, __LINE__,
1985                         _("gdbarch_architecture_names: multi-arch unknown"));
1986       do
1987         {
1988           append_name (&arches, &nr_arches, ap->printable_name);
1989           ap = ap->next;
1990         }
1991       while (ap != NULL);
1992     }
1993   append_name (&arches, &nr_arches, NULL);
1994   return arches;
1995 }
1996
1997
1998 void
1999 gdbarch_register (enum bfd_architecture bfd_architecture,
2000                   gdbarch_init_ftype *init,
2001                   gdbarch_dump_tdep_ftype *dump_tdep)
2002 {
2003   struct gdbarch_registration **curr;
2004   const struct bfd_arch_info *bfd_arch_info;
2005   /* Check that BFD recognizes this architecture */
2006   bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0);
2007   if (bfd_arch_info == NULL)
2008     {
2009       internal_error (__FILE__, __LINE__,
2010                       _("gdbarch: Attempt to register unknown architecture (%d)"),
2011                       bfd_architecture);
2012     }
2013   /* Check that we haven't seen this architecture before */
2014   for (curr = &gdbarch_registry;
2015        (*curr) != NULL;
2016        curr = &(*curr)->next)
2017     {
2018       if (bfd_architecture == (*curr)->bfd_architecture)
2019         internal_error (__FILE__, __LINE__,
2020                         _("gdbarch: Duplicate registraration of architecture (%s)"),
2021                         bfd_arch_info->printable_name);
2022     }
2023   /* log it */
2024   if (gdbarch_debug)
2025     fprintf_unfiltered (gdb_stdlog, "register_gdbarch_init (%s, 0x%08lx)\n",
2026                         bfd_arch_info->printable_name,
2027                         (long) init);
2028   /* Append it */
2029   (*curr) = XMALLOC (struct gdbarch_registration);
2030   (*curr)->bfd_architecture = bfd_architecture;
2031   (*curr)->init = init;
2032   (*curr)->dump_tdep = dump_tdep;
2033   (*curr)->arches = NULL;
2034   (*curr)->next = NULL;
2035 }
2036
2037 void
2038 register_gdbarch_init (enum bfd_architecture bfd_architecture,
2039                        gdbarch_init_ftype *init)
2040 {
2041   gdbarch_register (bfd_architecture, init, NULL);
2042 }
2043
2044
2045 /* Look for an architecture using gdbarch_info.  */
2046
2047 struct gdbarch_list *
2048 gdbarch_list_lookup_by_info (struct gdbarch_list *arches,
2049                              const struct gdbarch_info *info)
2050 {
2051   for (; arches != NULL; arches = arches->next)
2052     {
2053       if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info)
2054         continue;
2055       if (info->byte_order != arches->gdbarch->byte_order)
2056         continue;
2057       if (info->osabi != arches->gdbarch->osabi)
2058         continue;
2059       if (info->target_desc != arches->gdbarch->target_desc)
2060         continue;
2061       return arches;
2062     }
2063   return NULL;
2064 }
2065
2066
2067 /* Find an architecture that matches the specified INFO.  Create a new
2068    architecture if needed.  Return that new architecture.  Assumes
2069    that there is no current architecture.  */
2070
2071 static struct gdbarch *
2072 find_arch_by_info (struct gdbarch_info info)
2073 {
2074   struct gdbarch *new_gdbarch;
2075   struct gdbarch_registration *rego;
2076
2077   /* The existing architecture has been swapped out - all this code
2078      works from a clean slate.  */
2079   gdb_assert (current_gdbarch == NULL);
2080
2081   /* Fill in missing parts of the INFO struct using a number of
2082      sources: "set ..."; INFOabfd supplied; and the global
2083      defaults.  */
2084   gdbarch_info_fill (&info);
2085
2086   /* Must have found some sort of architecture. */
2087   gdb_assert (info.bfd_arch_info != NULL);
2088
2089   if (gdbarch_debug)
2090     {
2091       fprintf_unfiltered (gdb_stdlog,
2092                           "find_arch_by_info: info.bfd_arch_info %s\n",
2093                           (info.bfd_arch_info != NULL
2094                            ? info.bfd_arch_info->printable_name
2095                            : "(null)"));
2096       fprintf_unfiltered (gdb_stdlog,
2097                           "find_arch_by_info: info.byte_order %d (%s)\n",
2098                           info.byte_order,
2099                           (info.byte_order == BFD_ENDIAN_BIG ? "big"
2100                            : info.byte_order == BFD_ENDIAN_LITTLE ? "little"
2101                            : "default"));
2102       fprintf_unfiltered (gdb_stdlog,
2103                           "find_arch_by_info: info.osabi %d (%s)\n",
2104                           info.osabi, gdbarch_osabi_name (info.osabi));
2105       fprintf_unfiltered (gdb_stdlog,
2106                           "find_arch_by_info: info.abfd 0x%lx\n",
2107                           (long) info.abfd);
2108       fprintf_unfiltered (gdb_stdlog,
2109                           "find_arch_by_info: info.tdep_info 0x%lx\n",
2110                           (long) info.tdep_info);
2111     }
2112
2113   /* Find the tdep code that knows about this architecture.  */
2114   for (rego = gdbarch_registry;
2115        rego != NULL;
2116        rego = rego->next)
2117     if (rego->bfd_architecture == info.bfd_arch_info->arch)
2118       break;
2119   if (rego == NULL)
2120     {
2121       if (gdbarch_debug)
2122         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2123                             "No matching architecture\n");
2124       return 0;
2125     }
2126
2127   /* Ask the tdep code for an architecture that matches "info".  */
2128   new_gdbarch = rego->init (info, rego->arches);
2129
2130   /* Did the tdep code like it?  No.  Reject the change and revert to
2131      the old architecture.  */
2132   if (new_gdbarch == NULL)
2133     {
2134       if (gdbarch_debug)
2135         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2136                             "Target rejected architecture\n");
2137       return NULL;
2138     }
2139
2140   /* Is this a pre-existing architecture (as determined by already
2141      being initialized)?  Move it to the front of the architecture
2142      list (keeping the list sorted Most Recently Used).  */
2143   if (new_gdbarch->initialized_p)
2144     {
2145       struct gdbarch_list **list;
2146       struct gdbarch_list *this;
2147       if (gdbarch_debug)
2148         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2149                             "Previous architecture 0x%08lx (%s) selected\n",
2150                             (long) new_gdbarch,
2151                             new_gdbarch->bfd_arch_info->printable_name);
2152       /* Find the existing arch in the list.  */
2153       for (list = &rego->arches;
2154            (*list) != NULL && (*list)->gdbarch != new_gdbarch;
2155            list = &(*list)->next);
2156       /* It had better be in the list of architectures.  */
2157       gdb_assert ((*list) != NULL && (*list)->gdbarch == new_gdbarch);
2158       /* Unlink THIS.  */
2159       this = (*list);
2160       (*list) = this->next;
2161       /* Insert THIS at the front.  */
2162       this->next = rego->arches;
2163       rego->arches = this;
2164       /* Return it.  */
2165       return new_gdbarch;
2166     }
2167
2168   /* It's a new architecture.  */
2169   if (gdbarch_debug)
2170     fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2171                         "New architecture 0x%08lx (%s) selected\n",
2172                         (long) new_gdbarch,
2173                         new_gdbarch->bfd_arch_info->printable_name);
2174
2175   /* Insert the new architecture into the front of the architecture
2176      list (keep the list sorted Most Recently Used).  */
2177   {
2178     struct gdbarch_list *this = XMALLOC (struct gdbarch_list);
2179     this->next = rego->arches;
2180     this->gdbarch = new_gdbarch;
2181     rego->arches = this;
2182   }
2183
2184   /* Check that the newly installed architecture is valid.  Plug in
2185      any post init values.  */
2186   new_gdbarch->dump_tdep = rego->dump_tdep;
2187   verify_gdbarch (new_gdbarch);
2188   new_gdbarch->initialized_p = 1;
2189
2190   /* Initialize any per-architecture swap areas.  This phase requires
2191      a valid global CURRENT_GDBARCH.  Set it momentarially, and then
2192      swap the entire architecture out.  */
2193   current_gdbarch = new_gdbarch;
2194   current_gdbarch_swap_init_hack ();
2195   current_gdbarch_swap_out_hack ();
2196
2197   if (gdbarch_debug)
2198     gdbarch_dump (new_gdbarch, gdb_stdlog);
2199
2200   return new_gdbarch;
2201 }
2202
2203 struct gdbarch *
2204 gdbarch_find_by_info (struct gdbarch_info info)
2205 {
2206   /* Save the previously selected architecture, setting the global to
2207      NULL.  This stops things like gdbarch->init() trying to use the
2208      previous architecture's configuration.  The previous architecture
2209      may not even be of the same architecture family.  The most recent
2210      architecture of the same family is found at the head of the
2211      rego->arches list.  */
2212   struct gdbarch *old_gdbarch = current_gdbarch_swap_out_hack ();
2213
2214   /* Find the specified architecture.  */
2215   struct gdbarch *new_gdbarch = find_arch_by_info (info);
2216
2217   /* Restore the existing architecture.  */
2218   gdb_assert (current_gdbarch == NULL);
2219   current_gdbarch_swap_in_hack (old_gdbarch);
2220
2221   return new_gdbarch;
2222 }
2223
2224 /* Make the specified architecture current, swapping the existing one
2225    out.  */
2226
2227 void
2228 deprecated_current_gdbarch_select_hack (struct gdbarch *new_gdbarch)
2229 {
2230   gdb_assert (new_gdbarch != NULL);
2231   gdb_assert (current_gdbarch != NULL);
2232   gdb_assert (new_gdbarch->initialized_p);
2233   current_gdbarch_swap_out_hack ();
2234   current_gdbarch_swap_in_hack (new_gdbarch);
2235   architecture_changed_event ();
2236   reinit_frame_cache ();
2237 }
2238
2239 extern void _initialize_gdbarch (void);
2240
2241 void
2242 _initialize_gdbarch (void)
2243 {
2244   struct cmd_list_element *c;
2245
2246   add_setshow_zinteger_cmd ("arch", class_maintenance, &gdbarch_debug, _("\\
2247 Set architecture debugging."), _("\\
2248 Show architecture debugging."), _("\\
2249 When non-zero, architecture debugging is enabled."),
2250                             NULL,
2251                             show_gdbarch_debug,
2252                             &setdebuglist, &showdebuglist);
2253 }
2254 EOF
2255
2256 # close things off
2257 exec 1>&2
2258 #../move-if-change new-gdbarch.c gdbarch.c
2259 compare_new gdbarch.c