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 M::enum return_value_convention:return_value:struct type *valtype, struct regcache *regcache, gdb_byte *readbuf, const gdb_byte *writebuf:valtype, regcache, readbuf, writebuf
 502
 503 f::CORE_ADDR:skip_prologue:CORE_ADDR ip:ip:0:0
 504 f::int:inner_than:CORE_ADDR lhs, CORE_ADDR rhs:lhs, rhs:0:0
 505 f::const gdb_byte *:breakpoint_from_pc:CORE_ADDR *pcptr, int *lenptr:pcptr, lenptr::0:
 506 M::CORE_ADDR:adjust_breakpoint_address:CORE_ADDR bpaddr:bpaddr
 507 f::int:memory_insert_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_insert_breakpoint::0
 508 f::int:memory_remove_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_remove_breakpoint::0
 509 v::CORE_ADDR:decr_pc_after_break:::0:::0
 510
 511 # A function can be addressed by either it's "pointer" (possibly a
 512 # descriptor address) or "entry point" (first executable instruction).
 513 # The method "convert_from_func_ptr_addr" converting the former to the
 514 # latter.  gdbarch_deprecated_function_start_offset is being used to implement
 515 # a simplified subset of that functionality - the function's address
 516 # corresponds to the "function pointer" and the function's start
 517 # corresponds to the "function entry point" - and hence is redundant.
 518
 519 v::CORE_ADDR:deprecated_function_start_offset:::0:::0
 520
 521 # Return the remote protocol register number associated with this
 522 # register.  Normally the identity mapping.
 523 m::int:remote_register_number:int regno:regno::default_remote_register_number::0
 524
 525 # Fetch the target specific address used to represent a load module.
 526 F::CORE_ADDR:fetch_tls_load_module_address:struct objfile *objfile:objfile
 527 #
 528 v::CORE_ADDR:frame_args_skip:::0:::0
 529 M::CORE_ADDR:unwind_pc:struct frame_info *next_frame:next_frame
 530 M::CORE_ADDR:unwind_sp:struct frame_info *next_frame:next_frame
 531 # DEPRECATED_FRAME_LOCALS_ADDRESS as been replaced by the per-frame
 532 # frame-base.  Enable frame-base before frame-unwind.
 533 F::int:frame_num_args:struct frame_info *frame:frame
 534 #
 535 M::CORE_ADDR:frame_align:CORE_ADDR address:address
 536 m::int:stabs_argument_has_addr:struct type *type:type::default_stabs_argument_has_addr::0
 537 v::int:frame_red_zone_size
 538 #
 539 m::CORE_ADDR:convert_from_func_ptr_addr:CORE_ADDR addr, struct target_ops *targ:addr, targ::convert_from_func_ptr_addr_identity::0
 540 # On some machines there are bits in addresses which are not really
 541 # part of the address, but are used by the kernel, the hardware, etc.
 542 # for special purposes.  gdbarch_addr_bits_remove takes out any such bits so
 543 # we get a "real" address such as one would find in a symbol table.
 544 # This is used only for addresses of instructions, and even then I'm
 545 # not sure it's used in all contexts.  It exists to deal with there
 546 # being a few stray bits in the PC which would mislead us, not as some
 547 # sort of generic thing to handle alignment or segmentation (it's
 548 # possible it should be in TARGET_READ_PC instead).
 549 f::CORE_ADDR:addr_bits_remove:CORE_ADDR addr:addr::core_addr_identity::0
 550 # It is not at all clear why gdbarch_smash_text_address is not folded into
 551 # gdbarch_addr_bits_remove.
 552 f::CORE_ADDR:smash_text_address:CORE_ADDR addr:addr::core_addr_identity::0
 553
 554 # FIXME/cagney/2001-01-18: This should be split in two.  A target method that
 555 # indicates if the target needs software single step.  An ISA method to
 556 # implement it.
 557 #
 558 # FIXME/cagney/2001-01-18: This should be replaced with something that inserts
 559 # breakpoints using the breakpoint system instead of blatting memory directly
 560 # (as with rs6000).
 561 #
 562 # FIXME/cagney/2001-01-18: The logic is backwards.  It should be asking if the
 563 # target can single step.  If not, then implement single step using breakpoints.
 564 #
 565 # A return value of 1 means that the software_single_step breakpoints
 566 # were inserted; 0 means they were not.
 567 F::int:software_single_step:struct frame_info *frame:frame
 568
 569 # Return non-zero if the processor is executing a delay slot and a
 570 # further single-step is needed before the instruction finishes.
 571 M::int:single_step_through_delay:struct frame_info *frame:frame
 572 # FIXME: cagney/2003-08-28: Need to find a better way of selecting the
 573 # disassembler.  Perhaps objdump can handle it?
 574 f::int:print_insn:bfd_vma vma, struct disassemble_info *info:vma, info::0:
 575 f::CORE_ADDR:skip_trampoline_code:struct frame_info *frame, CORE_ADDR pc:frame, pc::generic_skip_trampoline_code::0
 576
 577
 578 # If IN_SOLIB_DYNSYM_RESOLVE_CODE returns true, and SKIP_SOLIB_RESOLVER
 579 # evaluates non-zero, this is the address where the debugger will place
 580 # a step-resume breakpoint to get us past the dynamic linker.
 581 m::CORE_ADDR:skip_solib_resolver:CORE_ADDR pc:pc::generic_skip_solib_resolver::0
 582 # Some systems also have trampoline code for returning from shared libs.
 583 f::int:in_solib_return_trampoline:CORE_ADDR pc, char *name:pc, name::generic_in_solib_return_trampoline::0
 584
 585 # A target might have problems with watchpoints as soon as the stack
 586 # frame of the current function has been destroyed.  This mostly happens
 587 # as the first action in a funtion's epilogue.  in_function_epilogue_p()
 588 # is defined to return a non-zero value if either the given addr is one
 589 # instruction after the stack destroying instruction up to the trailing
 590 # return instruction or if we can figure out that the stack frame has
 591 # already been invalidated regardless of the value of addr.  Targets
 592 # which don't suffer from that problem could just let this functionality
 593 # untouched.
 594 m::int:in_function_epilogue_p:CORE_ADDR addr:addr:0:generic_in_function_epilogue_p::0
 595 # Given a vector of command-line arguments, return a newly allocated
 596 # string which, when passed to the create_inferior function, will be
 597 # parsed (on Unix systems, by the shell) to yield the same vector.
 598 # This function should call error() if the argument vector is not
 599 # representable for this target or if this target does not support
 600 # command-line arguments.
 601 # ARGC is the number of elements in the vector.
 602 # ARGV is an array of strings, one per argument.
 603 m::char *:construct_inferior_arguments:int argc, char **argv:argc, argv::construct_inferior_arguments::0
 604 f::void:elf_make_msymbol_special:asymbol *sym, struct minimal_symbol *msym:sym, msym::default_elf_make_msymbol_special::0
 605 f::void:coff_make_msymbol_special:int val, struct minimal_symbol *msym:val, msym::default_coff_make_msymbol_special::0
 606 v::const char *:name_of_malloc:::"malloc":"malloc"::0:current_gdbarch->name_of_malloc
 607 v::int:cannot_step_breakpoint:::0:0::0
 608 v::int:have_nonsteppable_watchpoint:::0:0::0
 609 F::int:address_class_type_flags:int byte_size, int dwarf2_addr_class:byte_size, dwarf2_addr_class
 610 M::const char *:address_class_type_flags_to_name:int type_flags:type_flags
 611 M::int:address_class_name_to_type_flags:const char *name, int *type_flags_ptr:name, type_flags_ptr
 612 # Is a register in a group
 613 m::int:register_reggroup_p:int regnum, struct reggroup *reggroup:regnum, reggroup::default_register_reggroup_p::0
 614 # Fetch the pointer to the ith function argument.
 615 F::CORE_ADDR:fetch_pointer_argument:struct frame_info *frame, int argi, struct type *type:frame, argi, type
 616
 617 # Return the appropriate register set for a core file section with
 618 # name SECT_NAME and size SECT_SIZE.
 619 M::const struct regset *:regset_from_core_section:const char *sect_name, size_t sect_size:sect_name, sect_size
 620
 621 # Read offset OFFSET of TARGET_OBJECT_LIBRARIES formatted shared libraries list from
 622 # core file into buffer READBUF with length LEN.
 623 M::LONGEST:core_xfer_shared_libraries:gdb_byte *readbuf, ULONGEST offset, LONGEST len:readbuf, offset, len
 624
 625 # If the elements of C++ vtables are in-place function descriptors rather
 626 # than normal function pointers (which may point to code or a descriptor),
 627 # set this to one.
 628 v::int:vtable_function_descriptors:::0:0::0
 629
 630 # Set if the least significant bit of the delta is used instead of the least
 631 # significant bit of the pfn for pointers to virtual member functions.
 632 v::int:vbit_in_delta:::0:0::0
 633
 634 # Advance PC to next instruction in order to skip a permanent breakpoint.
 635 F::void:skip_permanent_breakpoint:struct regcache *regcache:regcache
 636
 637 # Refresh overlay mapped state for section OSECT.
 638 F::void:overlay_update:struct obj_section *osect:osect
 639
 640 M::const struct target_desc *:core_read_description:struct target_ops *target, bfd *abfd:target, abfd
 641
 642 # Handle special encoding of static variables in stabs debug info.
 643 F::char *:static_transform_name:char *name:name
 644 # Set if the address in N_SO or N_FUN stabs may be zero.
 645 v::int:sofun_address_maybe_missing:::0:0::0
 646 EOF
 647 }
 648
 649 #
 650 # The .log file
 651 #
 652 exec > new-gdbarch.log
 653 function_list | while do_read
 654 do
 655     cat <<EOF
 656 ${class} ${returntype} ${function} ($formal)
 657 EOF
 658     for r in ${read}
 659     do
 660         eval echo \"\ \ \ \ ${r}=\${${r}}\"
 661     done
 662     if class_is_predicate_p && fallback_default_p
 663     then
 664         echo "Error: predicate function ${function} can not have a non- multi-arch default" 1>&2
 665         kill $$
 666         exit 1
 667     fi
 668     if [ "x${invalid_p}" = "x0" -a -n "${postdefault}" ]
 669     then
 670         echo "Error: postdefault is useless when invalid_p=0" 1>&2
 671         kill $$
 672         exit 1
 673     fi
 674     if class_is_multiarch_p
 675     then
 676         if class_is_predicate_p ; then :
 677         elif test "x${predefault}" = "x"
 678         then
 679             echo "Error: pure multi-arch function ${function} must have a predefault" 1>&2
 680             kill $$
 681             exit 1
 682         fi
 683     fi
 684     echo ""
 685 done
 686
 687 exec 1>&2
 688 compare_new gdbarch.log
 689
 690
 691 copyright ()
 692 {
 693 cat <<EOF
 694 /* *INDENT-OFF* */ /* THIS FILE IS GENERATED */
 695
 696 /* Dynamic architecture support for GDB, the GNU debugger.
 697
 698    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
 699    Free Software Foundation, Inc.
 700
 701    This file is part of GDB.
 702
 703    This program is free software; you can redistribute it and/or modify
 704    it under the terms of the GNU General Public License as published by
 705    the Free Software Foundation; either version 3 of the License, or
 706    (at your option) any later version.
 707
 708    This program is distributed in the hope that it will be useful,
 709    but WITHOUT ANY WARRANTY; without even the implied warranty of
 710    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 711    GNU General Public License for more details.
 712
 713    You should have received a copy of the GNU General Public License
 714    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 715
 716 /* This file was created with the aid of \`\`gdbarch.sh''.
 717
 718    The Bourne shell script \`\`gdbarch.sh'' creates the files
 719    \`\`new-gdbarch.c'' and \`\`new-gdbarch.h and then compares them
 720    against the existing \`\`gdbarch.[hc]''.  Any differences found
 721    being reported.
 722
 723    If editing this file, please also run gdbarch.sh and merge any
 724    changes into that script. Conversely, when making sweeping changes
 725    to this file, modifying gdbarch.sh and using its output may prove
 726    easier. */
 727
 728 EOF
 729 }
 730
 731 #
 732 # The .h file
 733 #
 734
 735 exec > new-gdbarch.h
 736 copyright
 737 cat <<EOF
 738 #ifndef GDBARCH_H
 739 #define GDBARCH_H
 740
 741 struct floatformat;
 742 struct ui_file;
 743 struct frame_info;
 744 struct value;
 745 struct objfile;
 746 struct obj_section;
 747 struct minimal_symbol;
 748 struct regcache;
 749 struct reggroup;
 750 struct regset;
 751 struct disassemble_info;
 752 struct target_ops;
 753 struct obstack;
 754 struct bp_target_info;
 755 struct target_desc;
 756
 757 extern struct gdbarch *current_gdbarch;
 758 EOF
 759
 760 # function typedef's
 761 printf "\n"
 762 printf "\n"
 763 printf "/* The following are pre-initialized by GDBARCH. */\n"
 764 function_list | while do_read
 765 do
 766     if class_is_info_p
 767     then
 768         printf "\n"
 769         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 770         printf "/* set_gdbarch_${function}() - not applicable - pre-initialized. */\n"
 771         if test -n "${macro}"
 772         then
 773             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 774             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 775             printf "#endif\n"
 776             printf "#if !defined (${macro})\n"
 777             printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 778             printf "#endif\n"
 779         fi
 780     fi
 781 done
 782
 783 # function typedef's
 784 printf "\n"
 785 printf "\n"
 786 printf "/* The following are initialized by the target dependent code. */\n"
 787 function_list | while do_read
 788 do
 789     if [ -n "${comment}" ]
 790     then
 791         echo "${comment}" | sed \
 792             -e '2 s,#,/*,' \
 793             -e '3,$ s,#,  ,' \
 794             -e '$ s,$, */,'
 795     fi
 796
 797     if class_is_predicate_p
 798     then
 799         if test -n "${macro}"
 800         then
 801             printf "\n"
 802             printf "#if defined (${macro})\n"
 803             printf "/* Legacy for systems yet to multi-arch ${macro} */\n"
 804             printf "#if !defined (${macro}_P)\n"
 805             printf "#define ${macro}_P() (1)\n"
 806             printf "#endif\n"
 807             printf "#endif\n"
 808         fi
 809         printf "\n"
 810         printf "extern int gdbarch_${function}_p (struct gdbarch *gdbarch);\n"
 811         if test -n "${macro}"
 812         then
 813             printf "#if !defined (GDB_TM_FILE) && defined (${macro}_P)\n"
 814             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 815             printf "#endif\n"
 816             printf "#if !defined (${macro}_P)\n"
 817             printf "#define ${macro}_P() (gdbarch_${function}_p (current_gdbarch))\n"
 818             printf "#endif\n"
 819         fi
 820     fi
 821     if class_is_variable_p
 822     then
 823         printf "\n"
 824         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 825         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, ${returntype} ${function});\n"
 826         if test -n "${macro}"
 827         then
 828             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 829             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 830             printf "#endif\n"
 831             printf "#if !defined (${macro})\n"
 832             printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 833             printf "#endif\n"
 834         fi
 835     fi
 836     if class_is_function_p
 837     then
 838         printf "\n"
 839         if [ "x${formal}" = "xvoid" ] && class_is_multiarch_p
 840         then
 841             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch);\n"
 842         elif class_is_multiarch_p
 843         then
 844             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch, ${formal});\n"
 845         else
 846             printf "typedef ${returntype} (gdbarch_${function}_ftype) (${formal});\n"
 847         fi
 848         if [ "x${formal}" = "xvoid" ]
 849         then
 850           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 851         else
 852           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch, ${formal});\n"
 853         fi
 854         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, gdbarch_${function}_ftype *${function});\n"
 855         if test -n "${macro}"
 856         then
 857             printf "#if !defined (GDB_TM_FILE) && defined (${macro})\n"
 858             printf "#error \"Non multi-arch definition of ${macro}\"\n"
 859             printf "#endif\n"
 860             if [ "x${actual}" = "x" ]
 861             then
 862                 d="#define ${macro}() (gdbarch_${function} (current_gdbarch))"
 863             elif [ "x${actual}" = "x-" ]
 864             then
 865                 d="#define ${macro} (gdbarch_${function} (current_gdbarch))"
 866             else
 867                 d="#define ${macro}(${actual}) (gdbarch_${function} (current_gdbarch, ${actual}))"
 868             fi
 869             printf "#if !defined (${macro})\n"
 870             if [ "x${actual}" = "x" ]
 871             then
 872                 printf "#define ${macro}() (gdbarch_${function} (current_gdbarch))\n"
 873             elif [ "x${actual}" = "x-" ]
 874             then
 875                 printf "#define ${macro} (gdbarch_${function} (current_gdbarch))\n"
 876             else
 877                 printf "#define ${macro}(${actual}) (gdbarch_${function} (current_gdbarch, ${actual}))\n"
 878             fi
 879             printf "#endif\n"
 880         fi
 881     fi
 882 done
 883
 884 # close it off
 885 cat <<EOF
 886
 887 extern struct gdbarch_tdep *gdbarch_tdep (struct gdbarch *gdbarch);
 888
 889
 890 /* Mechanism for co-ordinating the selection of a specific
 891    architecture.
 892
 893    GDB targets (*-tdep.c) can register an interest in a specific
 894    architecture.  Other GDB components can register a need to maintain
 895    per-architecture data.
 896
 897    The mechanisms below ensures that there is only a loose connection
 898    between the set-architecture command and the various GDB
 899    components.  Each component can independently register their need
 900    to maintain architecture specific data with gdbarch.
 901
 902    Pragmatics:
 903
 904    Previously, a single TARGET_ARCHITECTURE_HOOK was provided.  It
 905    didn't scale.
 906
 907    The more traditional mega-struct containing architecture specific
 908    data for all the various GDB components was also considered.  Since
 909    GDB is built from a variable number of (fairly independent)
 910    components it was determined that the global aproach was not
 911    applicable. */
 912
 913
 914 /* Register a new architectural family with GDB.
 915
 916    Register support for the specified ARCHITECTURE with GDB.  When
 917    gdbarch determines that the specified architecture has been
 918    selected, the corresponding INIT function is called.
 919
 920    --
 921
 922    The INIT function takes two parameters: INFO which contains the
 923    information available to gdbarch about the (possibly new)
 924    architecture; ARCHES which is a list of the previously created
 925    \`\`struct gdbarch'' for this architecture.
 926
 927    The INFO parameter is, as far as possible, be pre-initialized with
 928    information obtained from INFO.ABFD or the global defaults.
 929
 930    The ARCHES parameter is a linked list (sorted most recently used)
 931    of all the previously created architures for this architecture
 932    family.  The (possibly NULL) ARCHES->gdbarch can used to access
 933    values from the previously selected architecture for this
 934    architecture family.  The global \`\`current_gdbarch'' shall not be
 935    used.
 936
 937    The INIT function shall return any of: NULL - indicating that it
 938    doesn't recognize the selected architecture; an existing \`\`struct
 939    gdbarch'' from the ARCHES list - indicating that the new
 940    architecture is just a synonym for an earlier architecture (see
 941    gdbarch_list_lookup_by_info()); a newly created \`\`struct gdbarch''
 942    - that describes the selected architecture (see gdbarch_alloc()).
 943
 944    The DUMP_TDEP function shall print out all target specific values.
 945    Care should be taken to ensure that the function works in both the
 946    multi-arch and non- multi-arch cases. */
 947
 948 struct gdbarch_list
 949 {
 950   struct gdbarch *gdbarch;
 951   struct gdbarch_list *next;
 952 };
 953
 954 struct gdbarch_info
 955 {
 956   /* Use default: NULL (ZERO). */
 957   const struct bfd_arch_info *bfd_arch_info;
 958
 959   /* Use default: BFD_ENDIAN_UNKNOWN (NB: is not ZERO).  */
 960   int byte_order;
 961
 962   /* Use default: NULL (ZERO). */
 963   bfd *abfd;
 964
 965   /* Use default: NULL (ZERO). */
 966   struct gdbarch_tdep_info *tdep_info;
 967
 968   /* Use default: GDB_OSABI_UNINITIALIZED (-1).  */
 969   enum gdb_osabi osabi;
 970
 971   /* Use default: NULL (ZERO).  */
 972   const struct target_desc *target_desc;
 973 };
 974
 975 typedef struct gdbarch *(gdbarch_init_ftype) (struct gdbarch_info info, struct gdbarch_list *arches);
 976 typedef void (gdbarch_dump_tdep_ftype) (struct gdbarch *gdbarch, struct ui_file *file);
 977
 978 /* DEPRECATED - use gdbarch_register() */
 979 extern void register_gdbarch_init (enum bfd_architecture architecture, gdbarch_init_ftype *);
 980
 981 extern void gdbarch_register (enum bfd_architecture architecture,
 982                               gdbarch_init_ftype *,
 983                               gdbarch_dump_tdep_ftype *);
 984
 985
 986 /* Return a freshly allocated, NULL terminated, array of the valid
 987    architecture names.  Since architectures are registered during the
 988    _initialize phase this function only returns useful information
 989    once initialization has been completed. */
 990
 991 extern const char **gdbarch_printable_names (void);
 992
 993
 994 /* Helper function.  Search the list of ARCHES for a GDBARCH that
 995    matches the information provided by INFO. */
 996
 997 extern struct gdbarch_list *gdbarch_list_lookup_by_info (struct gdbarch_list *arches, const struct gdbarch_info *info);
 998
 999
1000 /* Helper function.  Create a preliminary \`\`struct gdbarch''.  Perform
1001    basic initialization using values obtained from the INFO and TDEP
1002    parameters.  set_gdbarch_*() functions are called to complete the
1003    initialization of the object. */
1004
1005 extern struct gdbarch *gdbarch_alloc (const struct gdbarch_info *info, struct gdbarch_tdep *tdep);
1006
1007
1008 /* Helper function.  Free a partially-constructed \`\`struct gdbarch''.
1009    It is assumed that the caller freeds the \`\`struct
1010    gdbarch_tdep''. */
1011
1012 extern void gdbarch_free (struct gdbarch *);
1013
1014
1015 /* Helper function.  Allocate memory from the \`\`struct gdbarch''
1016    obstack.  The memory is freed when the corresponding architecture
1017    is also freed.  */
1018
1019 extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
1020 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
1021 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
1022
1023
1024 /* Helper function. Force an update of the current architecture.
1025
1026    The actual architecture selected is determined by INFO, \`\`(gdb) set
1027    architecture'' et.al., the existing architecture and BFD's default
1028    architecture.  INFO should be initialized to zero and then selected
1029    fields should be updated.
1030
1031    Returns non-zero if the update succeeds */
1032
1033 extern int gdbarch_update_p (struct gdbarch_info info);
1034
1035
1036 /* Helper function.  Find an architecture matching info.
1037
1038    INFO should be initialized using gdbarch_info_init, relevant fields
1039    set, and then finished using gdbarch_info_fill.
1040
1041    Returns the corresponding architecture, or NULL if no matching
1042    architecture was found.  "current_gdbarch" is not updated.  */
1043
1044 extern struct gdbarch *gdbarch_find_by_info (struct gdbarch_info info);
1045
1046
1047 /* Helper function.  Set the global "current_gdbarch" to "gdbarch".
1048
1049    FIXME: kettenis/20031124: Of the functions that follow, only
1050    gdbarch_from_bfd is supposed to survive.  The others will
1051    dissappear since in the future GDB will (hopefully) be truly
1052    multi-arch.  However, for now we're still stuck with the concept of
1053    a single active architecture.  */
1054
1055 extern void deprecated_current_gdbarch_select_hack (struct gdbarch *gdbarch);
1056
1057
1058 /* Register per-architecture data-pointer.
1059
1060    Reserve space for a per-architecture data-pointer.  An identifier
1061    for the reserved data-pointer is returned.  That identifer should
1062    be saved in a local static variable.
1063
1064    Memory for the per-architecture data shall be allocated using
1065    gdbarch_obstack_zalloc.  That memory will be deleted when the
1066    corresponding architecture object is deleted.
1067
1068    When a previously created architecture is re-selected, the
1069    per-architecture data-pointer for that previous architecture is
1070    restored.  INIT() is not re-called.
1071
1072    Multiple registrarants for any architecture are allowed (and
1073    strongly encouraged).  */
1074
1075 struct gdbarch_data;
1076
1077 typedef void *(gdbarch_data_pre_init_ftype) (struct obstack *obstack);
1078 extern struct gdbarch_data *gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *init);
1079 typedef void *(gdbarch_data_post_init_ftype) (struct gdbarch *gdbarch);
1080 extern struct gdbarch_data *gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *init);
1081 extern void deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1082                                          struct gdbarch_data *data,
1083                                          void *pointer);
1084
1085 extern void *gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *);
1086
1087
1088 /* Set the dynamic target-system-dependent parameters (architecture,
1089    byte-order, ...) using information found in the BFD */
1090
1091 extern void set_gdbarch_from_file (bfd *);
1092
1093
1094 /* Initialize the current architecture to the "first" one we find on
1095    our list.  */
1096
1097 extern void initialize_current_architecture (void);
1098
1099 /* gdbarch trace variable */
1100 extern int gdbarch_debug;
1101
1102 extern void gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file);
1103
1104 #endif
1105 EOF
1106 exec 1>&2
1107 #../move-if-change new-gdbarch.h gdbarch.h
1108 compare_new gdbarch.h
1109
1110
1111 #
1112 # C file
1113 #
1114
1115 exec > new-gdbarch.c
1116 copyright
1117 cat <<EOF
1118
1119 #include "defs.h"
1120 #include "arch-utils.h"
1121
1122 #include "gdbcmd.h"
1123 #include "inferior.h"
1124 #include "symcat.h"
1125
1126 #include "floatformat.h"
1127
1128 #include "gdb_assert.h"
1129 #include "gdb_string.h"
1130 #include "gdb-events.h"
1131 #include "reggroups.h"
1132 #include "osabi.h"
1133 #include "gdb_obstack.h"
1134
1135 /* Static function declarations */
1136
1137 static void alloc_gdbarch_data (struct gdbarch *);
1138
1139 /* Non-zero if we want to trace architecture code.  */
1140
1141 #ifndef GDBARCH_DEBUG
1142 #define GDBARCH_DEBUG 0
1143 #endif
1144 int gdbarch_debug = GDBARCH_DEBUG;
1145 static void
1146 show_gdbarch_debug (struct ui_file *file, int from_tty,
1147                     struct cmd_list_element *c, const char *value)
1148 {
1149   fprintf_filtered (file, _("Architecture debugging is %s.\\n"), value);
1150 }
1151
1152 static const char *
1153 pformat (const struct floatformat **format)
1154 {
1155   if (format == NULL)
1156     return "(null)";
1157   else
1158     /* Just print out one of them - this is only for diagnostics.  */
1159     return format[0]->name;
1160 }
1161
1162 EOF
1163
1164 # gdbarch open the gdbarch object
1165 printf "\n"
1166 printf "/* Maintain the struct gdbarch object */\n"
1167 printf "\n"
1168 printf "struct gdbarch\n"
1169 printf "{\n"
1170 printf "  /* Has this architecture been fully initialized?  */\n"
1171 printf "  int initialized_p;\n"
1172 printf "\n"
1173 printf "  /* An obstack bound to the lifetime of the architecture.  */\n"
1174 printf "  struct obstack *obstack;\n"
1175 printf "\n"
1176 printf "  /* basic architectural information */\n"
1177 function_list | while do_read
1178 do
1179     if class_is_info_p
1180     then
1181         printf "  ${returntype} ${function};\n"
1182     fi
1183 done
1184 printf "\n"
1185 printf "  /* target specific vector. */\n"
1186 printf "  struct gdbarch_tdep *tdep;\n"
1187 printf "  gdbarch_dump_tdep_ftype *dump_tdep;\n"
1188 printf "\n"
1189 printf "  /* per-architecture data-pointers */\n"
1190 printf "  unsigned nr_data;\n"
1191 printf "  void **data;\n"
1192 printf "\n"
1193 printf "  /* per-architecture swap-regions */\n"
1194 printf "  struct gdbarch_swap *swap;\n"
1195 printf "\n"
1196 cat <<EOF
1197   /* Multi-arch values.
1198
1199      When extending this structure you must:
1200
1201      Add the field below.
1202
1203      Declare set/get functions and define the corresponding
1204      macro in gdbarch.h.
1205
1206      gdbarch_alloc(): If zero/NULL is not a suitable default,
1207      initialize the new field.
1208
1209      verify_gdbarch(): Confirm that the target updated the field
1210      correctly.
1211
1212      gdbarch_dump(): Add a fprintf_unfiltered call so that the new
1213      field is dumped out
1214
1215      \`\`startup_gdbarch()'': Append an initial value to the static
1216      variable (base values on the host's c-type system).
1217
1218      get_gdbarch(): Implement the set/get functions (probably using
1219      the macro's as shortcuts).
1220
1221      */
1222
1223 EOF
1224 function_list | while do_read
1225 do
1226     if class_is_variable_p
1227     then
1228         printf "  ${returntype} ${function};\n"
1229     elif class_is_function_p
1230     then
1231         printf "  gdbarch_${function}_ftype *${function};\n"
1232     fi
1233 done
1234 printf "};\n"
1235
1236 # A pre-initialized vector
1237 printf "\n"
1238 printf "\n"
1239 cat <<EOF
1240 /* The default architecture uses host values (for want of a better
1241    choice). */
1242 EOF
1243 printf "\n"
1244 printf "extern const struct bfd_arch_info bfd_default_arch_struct;\n"
1245 printf "\n"
1246 printf "struct gdbarch startup_gdbarch =\n"
1247 printf "{\n"
1248 printf "  1, /* Always initialized.  */\n"
1249 printf "  NULL, /* The obstack.  */\n"
1250 printf "  /* basic architecture information */\n"
1251 function_list | while do_read
1252 do
1253     if class_is_info_p
1254     then
1255         printf "  ${staticdefault},  /* ${function} */\n"
1256     fi
1257 done
1258 cat <<EOF
1259   /* target specific vector and its dump routine */
1260   NULL, NULL,
1261   /*per-architecture data-pointers and swap regions */
1262   0, NULL, NULL,
1263   /* Multi-arch values */
1264 EOF
1265 function_list | while do_read
1266 do
1267     if class_is_function_p || class_is_variable_p
1268     then
1269         printf "  ${staticdefault},  /* ${function} */\n"
1270     fi
1271 done
1272 cat <<EOF
1273   /* startup_gdbarch() */
1274 };
1275
1276 struct gdbarch *current_gdbarch = &startup_gdbarch;
1277 EOF
1278
1279 # Create a new gdbarch struct
1280 cat <<EOF
1281
1282 /* Create a new \`\`struct gdbarch'' based on information provided by
1283    \`\`struct gdbarch_info''. */
1284 EOF
1285 printf "\n"
1286 cat <<EOF
1287 struct gdbarch *
1288 gdbarch_alloc (const struct gdbarch_info *info,
1289                struct gdbarch_tdep *tdep)
1290 {
1291   /* NOTE: The new architecture variable is named \`\`current_gdbarch''
1292      so that macros such as TARGET_ARCHITECTURE, when expanded, refer to
1293      the current local architecture and not the previous global
1294      architecture.  This ensures that the new architectures initial
1295      values are not influenced by the previous architecture.  Once
1296      everything is parameterised with gdbarch, this will go away.  */
1297   struct gdbarch *current_gdbarch;
1298
1299   /* Create an obstack for allocating all the per-architecture memory,
1300      then use that to allocate the architecture vector.  */
1301   struct obstack *obstack = XMALLOC (struct obstack);
1302   obstack_init (obstack);
1303   current_gdbarch = obstack_alloc (obstack, sizeof (*current_gdbarch));
1304   memset (current_gdbarch, 0, sizeof (*current_gdbarch));
1305   current_gdbarch->obstack = obstack;
1306
1307   alloc_gdbarch_data (current_gdbarch);
1308
1309   current_gdbarch->tdep = tdep;
1310 EOF
1311 printf "\n"
1312 function_list | while do_read
1313 do
1314     if class_is_info_p
1315     then
1316         printf "  current_gdbarch->${function} = info->${function};\n"
1317     fi
1318 done
1319 printf "\n"
1320 printf "  /* Force the explicit initialization of these. */\n"
1321 function_list | while do_read
1322 do
1323     if class_is_function_p || class_is_variable_p
1324     then
1325         if [ -n "${predefault}" -a "x${predefault}" != "x0" ]
1326         then
1327           printf "  current_gdbarch->${function} = ${predefault};\n"
1328         fi
1329     fi
1330 done
1331 cat <<EOF
1332   /* gdbarch_alloc() */
1333
1334   return current_gdbarch;
1335 }
1336 EOF
1337
1338 # Free a gdbarch struct.
1339 printf "\n"
1340 printf "\n"
1341 cat <<EOF
1342 /* Allocate extra space using the per-architecture obstack.  */
1343
1344 void *
1345 gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
1346 {
1347   void *data = obstack_alloc (arch->obstack, size);
1348   memset (data, 0, size);
1349   return data;
1350 }
1351
1352
1353 /* Free a gdbarch struct.  This should never happen in normal
1354    operation --- once you've created a gdbarch, you keep it around.
1355    However, if an architecture's init function encounters an error
1356    building the structure, it may need to clean up a partially
1357    constructed gdbarch.  */
1358
1359 void
1360 gdbarch_free (struct gdbarch *arch)
1361 {
1362   struct obstack *obstack;
1363   gdb_assert (arch != NULL);
1364   gdb_assert (!arch->initialized_p);
1365   obstack = arch->obstack;
1366   obstack_free (obstack, 0); /* Includes the ARCH.  */
1367   xfree (obstack);
1368 }
1369 EOF
1370
1371 # verify a new architecture
1372 cat <<EOF
1373
1374
1375 /* Ensure that all values in a GDBARCH are reasonable.  */
1376
1377 /* NOTE/WARNING: The parameter is called \`\`current_gdbarch'' so that it
1378    just happens to match the global variable \`\`current_gdbarch''.  That
1379    way macros refering to that variable get the local and not the global
1380    version - ulgh.  Once everything is parameterised with gdbarch, this
1381    will go away. */
1382
1383 static void
1384 verify_gdbarch (struct gdbarch *current_gdbarch)
1385 {
1386   struct ui_file *log;
1387   struct cleanup *cleanups;
1388   long dummy;
1389   char *buf;
1390   log = mem_fileopen ();
1391   cleanups = make_cleanup_ui_file_delete (log);
1392   /* fundamental */
1393   if (current_gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)
1394     fprintf_unfiltered (log, "\n\tbyte-order");
1395   if (current_gdbarch->bfd_arch_info == NULL)
1396     fprintf_unfiltered (log, "\n\tbfd_arch_info");
1397   /* Check those that need to be defined for the given multi-arch level. */
1398 EOF
1399 function_list | while do_read
1400 do
1401     if class_is_function_p || class_is_variable_p
1402     then
1403         if [ "x${invalid_p}" = "x0" ]
1404         then
1405             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1406         elif class_is_predicate_p
1407         then
1408             printf "  /* Skip verify of ${function}, has predicate */\n"
1409         # FIXME: See do_read for potential simplification
1410         elif [ -n "${invalid_p}" -a -n "${postdefault}" ]
1411         then
1412             printf "  if (${invalid_p})\n"
1413             printf "    current_gdbarch->${function} = ${postdefault};\n"
1414         elif [ -n "${predefault}" -a -n "${postdefault}" ]
1415         then
1416             printf "  if (current_gdbarch->${function} == ${predefault})\n"
1417             printf "    current_gdbarch->${function} = ${postdefault};\n"
1418         elif [ -n "${postdefault}" ]
1419         then
1420             printf "  if (current_gdbarch->${function} == 0)\n"
1421             printf "    current_gdbarch->${function} = ${postdefault};\n"
1422         elif [ -n "${invalid_p}" ]
1423         then
1424             printf "  if (${invalid_p})\n"
1425             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1426         elif [ -n "${predefault}" ]
1427         then
1428             printf "  if (current_gdbarch->${function} == ${predefault})\n"
1429             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1430         fi
1431     fi
1432 done
1433 cat <<EOF
1434   buf = ui_file_xstrdup (log, &dummy);
1435   make_cleanup (xfree, buf);
1436   if (strlen (buf) > 0)
1437     internal_error (__FILE__, __LINE__,
1438                     _("verify_gdbarch: the following are invalid ...%s"),
1439                     buf);
1440   do_cleanups (cleanups);
1441 }
1442 EOF
1443
1444 # dump the structure
1445 printf "\n"
1446 printf "\n"
1447 cat <<EOF
1448 /* Print out the details of the current architecture. */
1449
1450 /* NOTE/WARNING: The parameter is called \`\`current_gdbarch'' so that it
1451    just happens to match the global variable \`\`current_gdbarch''.  That
1452    way macros refering to that variable get the local and not the global
1453    version - ulgh.  Once everything is parameterised with gdbarch, this
1454    will go away. */
1455
1456 void
1457 gdbarch_dump (struct gdbarch *current_gdbarch, struct ui_file *file)
1458 {
1459   const char *gdb_xm_file = "<not-defined>";
1460   const char *gdb_nm_file = "<not-defined>";
1461   const char *gdb_tm_file = "<not-defined>";
1462 #if defined (GDB_XM_FILE)
1463   gdb_xm_file = GDB_XM_FILE;
1464 #endif
1465   fprintf_unfiltered (file,
1466                       "gdbarch_dump: GDB_XM_FILE = %s\\n",
1467                       gdb_xm_file);
1468 #if defined (GDB_NM_FILE)
1469   gdb_nm_file = GDB_NM_FILE;
1470 #endif
1471   fprintf_unfiltered (file,
1472                       "gdbarch_dump: GDB_NM_FILE = %s\\n",
1473                       gdb_nm_file);
1474 #if defined (GDB_TM_FILE)
1475   gdb_tm_file = GDB_TM_FILE;
1476 #endif
1477   fprintf_unfiltered (file,
1478                       "gdbarch_dump: GDB_TM_FILE = %s\\n",
1479                       gdb_tm_file);
1480 EOF
1481 function_list | sort -t: -k 4 | while do_read
1482 do
1483     # First the predicate
1484     if class_is_predicate_p
1485     then
1486         if test -n "${macro}"
1487         then
1488             printf "#ifdef ${macro}_P\n"
1489             printf "  fprintf_unfiltered (file,\n"
1490             printf "                      \"gdbarch_dump: %%s # %%s\\\\n\",\n"
1491             printf "                      \"${macro}_P()\",\n"
1492             printf "                      XSTRING (${macro}_P ()));\n"
1493             printf "#endif\n"
1494         fi
1495         printf "  fprintf_unfiltered (file,\n"
1496         printf "                      \"gdbarch_dump: gdbarch_${function}_p() = %%d\\\\n\",\n"
1497         printf "                      gdbarch_${function}_p (current_gdbarch));\n"
1498     fi
1499     # Print the macro definition.
1500     if test -n "${macro}"
1501     then
1502         printf "#ifdef ${macro}\n"
1503         if class_is_function_p
1504         then
1505             printf "  fprintf_unfiltered (file,\n"
1506             printf "                      \"gdbarch_dump: %%s # %%s\\\\n\",\n"
1507             printf "                      \"${macro}(${actual})\",\n"
1508             printf "                      XSTRING (${macro} (${actual})));\n"
1509         else
1510             printf "  fprintf_unfiltered (file,\n"
1511             printf "                      \"gdbarch_dump: ${macro} # %%s\\\\n\",\n"
1512             printf "                      XSTRING (${macro}));\n"
1513         fi
1514         printf "#endif\n"
1515     fi
1516     # Print the corresponding value.
1517     if class_is_function_p
1518     then
1519         printf "  fprintf_unfiltered (file,\n"
1520         printf "                      \"gdbarch_dump: ${function} = <0x%%lx>\\\\n\",\n"
1521         printf "                      (long) current_gdbarch->${function});\n"
1522     else
1523         # It is a variable
1524         case "${print}:${returntype}" in
1525             :CORE_ADDR )
1526                 fmt="0x%s"
1527                 print="paddr_nz (current_gdbarch->${function})"
1528                 ;;
1529             :* )
1530                 fmt="%s"
1531                 print="paddr_d (current_gdbarch->${function})"
1532                 ;;
1533             * )
1534                 fmt="%s"
1535                 ;;
1536         esac
1537         printf "  fprintf_unfiltered (file,\n"
1538         printf "                      \"gdbarch_dump: ${function} = %s\\\\n\",\n" "${fmt}"
1539         printf "                      ${print});\n"
1540     fi
1541 done
1542 cat <<EOF
1543   if (current_gdbarch->dump_tdep != NULL)
1544     current_gdbarch->dump_tdep (current_gdbarch, file);
1545 }
1546 EOF
1547
1548
1549 # GET/SET
1550 printf "\n"
1551 cat <<EOF
1552 struct gdbarch_tdep *
1553 gdbarch_tdep (struct gdbarch *gdbarch)
1554 {
1555   if (gdbarch_debug >= 2)
1556     fprintf_unfiltered (gdb_stdlog, "gdbarch_tdep called\\n");
1557   return gdbarch->tdep;
1558 }
1559 EOF
1560 printf "\n"
1561 function_list | while do_read
1562 do
1563     if class_is_predicate_p
1564     then
1565         printf "\n"
1566         printf "int\n"
1567         printf "gdbarch_${function}_p (struct gdbarch *gdbarch)\n"
1568         printf "{\n"
1569         printf "  gdb_assert (gdbarch != NULL);\n"
1570         printf "  return ${predicate};\n"
1571         printf "}\n"
1572     fi
1573     if class_is_function_p
1574     then
1575         printf "\n"
1576         printf "${returntype}\n"
1577         if [ "x${formal}" = "xvoid" ]
1578         then
1579           printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1580         else
1581           printf "gdbarch_${function} (struct gdbarch *gdbarch, ${formal})\n"
1582         fi
1583         printf "{\n"
1584         printf "  gdb_assert (gdbarch != NULL);\n"
1585         printf "  gdb_assert (gdbarch->${function} != NULL);\n"
1586         if class_is_predicate_p && test -n "${predefault}"
1587         then
1588             # Allow a call to a function with a predicate.
1589             printf "  /* Do not check predicate: ${predicate}, allow call.  */\n"
1590         fi
1591         printf "  if (gdbarch_debug >= 2)\n"
1592         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1593         if [ "x${actual}" = "x-" -o "x${actual}" = "x" ]
1594         then
1595             if class_is_multiarch_p
1596             then
1597                 params="gdbarch"
1598             else
1599                 params=""
1600             fi
1601         else
1602             if class_is_multiarch_p
1603             then
1604                 params="gdbarch, ${actual}"
1605             else
1606                 params="${actual}"
1607             fi
1608         fi
1609         if [ "x${returntype}" = "xvoid" ]
1610         then
1611           printf "  gdbarch->${function} (${params});\n"
1612         else
1613           printf "  return gdbarch->${function} (${params});\n"
1614         fi
1615         printf "}\n"
1616         printf "\n"
1617         printf "void\n"
1618         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1619         printf "            `echo ${function} | sed -e 's/./ /g'`  gdbarch_${function}_ftype ${function})\n"
1620         printf "{\n"
1621         printf "  gdbarch->${function} = ${function};\n"
1622         printf "}\n"
1623     elif class_is_variable_p
1624     then
1625         printf "\n"
1626         printf "${returntype}\n"
1627         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1628         printf "{\n"
1629         printf "  gdb_assert (gdbarch != NULL);\n"
1630         if [ "x${invalid_p}" = "x0" ]
1631         then
1632             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1633         elif [ -n "${invalid_p}" ]
1634         then
1635             printf "  /* Check variable is valid.  */\n"
1636             printf "  gdb_assert (!(${invalid_p}));\n"
1637         elif [ -n "${predefault}" ]
1638         then
1639             printf "  /* Check variable changed from pre-default.  */\n"
1640             printf "  gdb_assert (gdbarch->${function} != ${predefault});\n"
1641         fi
1642         printf "  if (gdbarch_debug >= 2)\n"
1643         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1644         printf "  return gdbarch->${function};\n"
1645         printf "}\n"
1646         printf "\n"
1647         printf "void\n"
1648         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1649         printf "            `echo ${function} | sed -e 's/./ /g'`  ${returntype} ${function})\n"
1650         printf "{\n"
1651         printf "  gdbarch->${function} = ${function};\n"
1652         printf "}\n"
1653     elif class_is_info_p
1654     then
1655         printf "\n"
1656         printf "${returntype}\n"
1657         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1658         printf "{\n"
1659         printf "  gdb_assert (gdbarch != NULL);\n"
1660         printf "  if (gdbarch_debug >= 2)\n"
1661         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1662         printf "  return gdbarch->${function};\n"
1663         printf "}\n"
1664     fi
1665 done
1666
1667 # All the trailing guff
1668 cat <<EOF
1669
1670
1671 /* Keep a registry of per-architecture data-pointers required by GDB
1672    modules. */
1673
1674 struct gdbarch_data
1675 {
1676   unsigned index;
1677   int init_p;
1678   gdbarch_data_pre_init_ftype *pre_init;
1679   gdbarch_data_post_init_ftype *post_init;
1680 };
1681
1682 struct gdbarch_data_registration
1683 {
1684   struct gdbarch_data *data;
1685   struct gdbarch_data_registration *next;
1686 };
1687
1688 struct gdbarch_data_registry
1689 {
1690   unsigned nr;
1691   struct gdbarch_data_registration *registrations;
1692 };
1693
1694 struct gdbarch_data_registry gdbarch_data_registry =
1695 {
1696   0, NULL,
1697 };
1698
1699 static struct gdbarch_data *
1700 gdbarch_data_register (gdbarch_data_pre_init_ftype *pre_init,
1701                        gdbarch_data_post_init_ftype *post_init)
1702 {
1703   struct gdbarch_data_registration **curr;
1704   /* Append the new registraration.  */
1705   for (curr = &gdbarch_data_registry.registrations;
1706        (*curr) != NULL;
1707        curr = &(*curr)->next);
1708   (*curr) = XMALLOC (struct gdbarch_data_registration);
1709   (*curr)->next = NULL;
1710   (*curr)->data = XMALLOC (struct gdbarch_data);
1711   (*curr)->data->index = gdbarch_data_registry.nr++;
1712   (*curr)->data->pre_init = pre_init;
1713   (*curr)->data->post_init = post_init;
1714   (*curr)->data->init_p = 1;
1715   return (*curr)->data;
1716 }
1717
1718 struct gdbarch_data *
1719 gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *pre_init)
1720 {
1721   return gdbarch_data_register (pre_init, NULL);
1722 }
1723
1724 struct gdbarch_data *
1725 gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *post_init)
1726 {
1727   return gdbarch_data_register (NULL, post_init);
1728 }
1729
1730 /* Create/delete the gdbarch data vector. */
1731
1732 static void
1733 alloc_gdbarch_data (struct gdbarch *gdbarch)
1734 {
1735   gdb_assert (gdbarch->data == NULL);
1736   gdbarch->nr_data = gdbarch_data_registry.nr;
1737   gdbarch->data = GDBARCH_OBSTACK_CALLOC (gdbarch, gdbarch->nr_data, void *);
1738 }
1739
1740 /* Initialize the current value of the specified per-architecture
1741    data-pointer. */
1742
1743 void
1744 deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1745                              struct gdbarch_data *data,
1746                              void *pointer)
1747 {
1748   gdb_assert (data->index < gdbarch->nr_data);
1749   gdb_assert (gdbarch->data[data->index] == NULL);
1750   gdb_assert (data->pre_init == NULL);
1751   gdbarch->data[data->index] = pointer;
1752 }
1753
1754 /* Return the current value of the specified per-architecture
1755    data-pointer. */
1756
1757 void *
1758 gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *data)
1759 {
1760   gdb_assert (data->index < gdbarch->nr_data);
1761   if (gdbarch->data[data->index] == NULL)
1762     {
1763       /* The data-pointer isn't initialized, call init() to get a
1764          value.  */
1765       if (data->pre_init != NULL)
1766         /* Mid architecture creation: pass just the obstack, and not
1767            the entire architecture, as that way it isn't possible for
1768            pre-init code to refer to undefined architecture
1769            fields.  */
1770         gdbarch->data[data->index] = data->pre_init (gdbarch->obstack);
1771       else if (gdbarch->initialized_p
1772                && data->post_init != NULL)
1773         /* Post architecture creation: pass the entire architecture
1774            (as all fields are valid), but be careful to also detect
1775            recursive references.  */
1776         {
1777           gdb_assert (data->init_p);
1778           data->init_p = 0;
1779           gdbarch->data[data->index] = data->post_init (gdbarch);
1780           data->init_p = 1;
1781         }
1782       else
1783         /* The architecture initialization hasn't completed - punt -
1784          hope that the caller knows what they are doing.  Once
1785          deprecated_set_gdbarch_data has been initialized, this can be
1786          changed to an internal error.  */
1787         return NULL;
1788       gdb_assert (gdbarch->data[data->index] != NULL);
1789     }
1790   return gdbarch->data[data->index];
1791 }
1792
1793
1794 /* Keep a registry of the architectures known by GDB. */
1795
1796 struct gdbarch_registration
1797 {
1798   enum bfd_architecture bfd_architecture;
1799   gdbarch_init_ftype *init;
1800   gdbarch_dump_tdep_ftype *dump_tdep;
1801   struct gdbarch_list *arches;
1802   struct gdbarch_registration *next;
1803 };
1804
1805 static struct gdbarch_registration *gdbarch_registry = NULL;
1806
1807 static void
1808 append_name (const char ***buf, int *nr, const char *name)
1809 {
1810   *buf = xrealloc (*buf, sizeof (char**) * (*nr + 1));
1811   (*buf)[*nr] = name;
1812   *nr += 1;
1813 }
1814
1815 const char **
1816 gdbarch_printable_names (void)
1817 {
1818   /* Accumulate a list of names based on the registed list of
1819      architectures. */
1820   enum bfd_architecture a;
1821   int nr_arches = 0;
1822   const char **arches = NULL;
1823   struct gdbarch_registration *rego;
1824   for (rego = gdbarch_registry;
1825        rego != NULL;
1826        rego = rego->next)
1827     {
1828       const struct bfd_arch_info *ap;
1829       ap = bfd_lookup_arch (rego->bfd_architecture, 0);
1830       if (ap == NULL)
1831         internal_error (__FILE__, __LINE__,
1832                         _("gdbarch_architecture_names: multi-arch unknown"));
1833       do
1834         {
1835           append_name (&arches, &nr_arches, ap->printable_name);
1836           ap = ap->next;
1837         }
1838       while (ap != NULL);
1839     }
1840   append_name (&arches, &nr_arches, NULL);
1841   return arches;
1842 }
1843
1844
1845 void
1846 gdbarch_register (enum bfd_architecture bfd_architecture,
1847                   gdbarch_init_ftype *init,
1848                   gdbarch_dump_tdep_ftype *dump_tdep)
1849 {
1850   struct gdbarch_registration **curr;
1851   const struct bfd_arch_info *bfd_arch_info;
1852   /* Check that BFD recognizes this architecture */
1853   bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0);
1854   if (bfd_arch_info == NULL)
1855     {
1856       internal_error (__FILE__, __LINE__,
1857                       _("gdbarch: Attempt to register unknown architecture (%d)"),
1858                       bfd_architecture);
1859     }
1860   /* Check that we haven't seen this architecture before */
1861   for (curr = &gdbarch_registry;
1862        (*curr) != NULL;
1863        curr = &(*curr)->next)
1864     {
1865       if (bfd_architecture == (*curr)->bfd_architecture)
1866         internal_error (__FILE__, __LINE__,
1867                         _("gdbarch: Duplicate registraration of architecture (%s)"),
1868                         bfd_arch_info->printable_name);
1869     }
1870   /* log it */
1871   if (gdbarch_debug)
1872     fprintf_unfiltered (gdb_stdlog, "register_gdbarch_init (%s, 0x%08lx)\n",
1873                         bfd_arch_info->printable_name,
1874                         (long) init);
1875   /* Append it */
1876   (*curr) = XMALLOC (struct gdbarch_registration);
1877   (*curr)->bfd_architecture = bfd_architecture;
1878   (*curr)->init = init;
1879   (*curr)->dump_tdep = dump_tdep;
1880   (*curr)->arches = NULL;
1881   (*curr)->next = NULL;
1882 }
1883
1884 void
1885 register_gdbarch_init (enum bfd_architecture bfd_architecture,
1886                        gdbarch_init_ftype *init)
1887 {
1888   gdbarch_register (bfd_architecture, init, NULL);
1889 }
1890
1891
1892 /* Look for an architecture using gdbarch_info.  */
1893
1894 struct gdbarch_list *
1895 gdbarch_list_lookup_by_info (struct gdbarch_list *arches,
1896                              const struct gdbarch_info *info)
1897 {
1898   for (; arches != NULL; arches = arches->next)
1899     {
1900       if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info)
1901         continue;
1902       if (info->byte_order != arches->gdbarch->byte_order)
1903         continue;
1904       if (info->osabi != arches->gdbarch->osabi)
1905         continue;
1906       if (info->target_desc != arches->gdbarch->target_desc)
1907         continue;
1908       return arches;
1909     }
1910   return NULL;
1911 }
1912
1913
1914 /* Find an architecture that matches the specified INFO.  Create a new
1915    architecture if needed.  Return that new architecture.  Assumes
1916    that there is no current architecture.  */
1917
1918 static struct gdbarch *
1919 find_arch_by_info (struct gdbarch_info info)
1920 {
1921   struct gdbarch *new_gdbarch;
1922   struct gdbarch_registration *rego;
1923
1924   /* The existing architecture has been swapped out - all this code
1925      works from a clean slate.  */
1926   gdb_assert (current_gdbarch == NULL);
1927
1928   /* Fill in missing parts of the INFO struct using a number of
1929      sources: "set ..."; INFOabfd supplied; and the global
1930      defaults.  */
1931   gdbarch_info_fill (&info);
1932
1933   /* Must have found some sort of architecture. */
1934   gdb_assert (info.bfd_arch_info != NULL);
1935
1936   if (gdbarch_debug)
1937     {
1938       fprintf_unfiltered (gdb_stdlog,
1939                           "find_arch_by_info: info.bfd_arch_info %s\n",
1940                           (info.bfd_arch_info != NULL
1941                            ? info.bfd_arch_info->printable_name
1942                            : "(null)"));
1943       fprintf_unfiltered (gdb_stdlog,
1944                           "find_arch_by_info: info.byte_order %d (%s)\n",
1945                           info.byte_order,
1946                           (info.byte_order == BFD_ENDIAN_BIG ? "big"
1947                            : info.byte_order == BFD_ENDIAN_LITTLE ? "little"
1948                            : "default"));
1949       fprintf_unfiltered (gdb_stdlog,
1950                           "find_arch_by_info: info.osabi %d (%s)\n",
1951                           info.osabi, gdbarch_osabi_name (info.osabi));
1952       fprintf_unfiltered (gdb_stdlog,
1953                           "find_arch_by_info: info.abfd 0x%lx\n",
1954                           (long) info.abfd);
1955       fprintf_unfiltered (gdb_stdlog,
1956                           "find_arch_by_info: info.tdep_info 0x%lx\n",
1957                           (long) info.tdep_info);
1958     }
1959
1960   /* Find the tdep code that knows about this architecture.  */
1961   for (rego = gdbarch_registry;
1962        rego != NULL;
1963        rego = rego->next)
1964     if (rego->bfd_architecture == info.bfd_arch_info->arch)
1965       break;
1966   if (rego == NULL)
1967     {
1968       if (gdbarch_debug)
1969         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
1970                             "No matching architecture\n");
1971       return 0;
1972     }
1973
1974   /* Ask the tdep code for an architecture that matches "info".  */
1975   new_gdbarch = rego->init (info, rego->arches);
1976
1977   /* Did the tdep code like it?  No.  Reject the change and revert to
1978      the old architecture.  */
1979   if (new_gdbarch == NULL)
1980     {
1981       if (gdbarch_debug)
1982         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
1983                             "Target rejected architecture\n");
1984       return NULL;
1985     }
1986
1987   /* Is this a pre-existing architecture (as determined by already
1988      being initialized)?  Move it to the front of the architecture
1989      list (keeping the list sorted Most Recently Used).  */
1990   if (new_gdbarch->initialized_p)
1991     {
1992       struct gdbarch_list **list;
1993       struct gdbarch_list *this;
1994       if (gdbarch_debug)
1995         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
1996                             "Previous architecture 0x%08lx (%s) selected\n",
1997                             (long) new_gdbarch,
1998                             new_gdbarch->bfd_arch_info->printable_name);
1999       /* Find the existing arch in the list.  */
2000       for (list = &rego->arches;
2001            (*list) != NULL && (*list)->gdbarch != new_gdbarch;
2002            list = &(*list)->next);
2003       /* It had better be in the list of architectures.  */
2004       gdb_assert ((*list) != NULL && (*list)->gdbarch == new_gdbarch);
2005       /* Unlink THIS.  */
2006       this = (*list);
2007       (*list) = this->next;
2008       /* Insert THIS at the front.  */
2009       this->next = rego->arches;
2010       rego->arches = this;
2011       /* Return it.  */
2012       return new_gdbarch;
2013     }
2014
2015   /* It's a new architecture.  */
2016   if (gdbarch_debug)
2017     fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2018                         "New architecture 0x%08lx (%s) selected\n",
2019                         (long) new_gdbarch,
2020                         new_gdbarch->bfd_arch_info->printable_name);
2021
2022   /* Insert the new architecture into the front of the architecture
2023      list (keep the list sorted Most Recently Used).  */
2024   {
2025     struct gdbarch_list *this = XMALLOC (struct gdbarch_list);
2026     this->next = rego->arches;
2027     this->gdbarch = new_gdbarch;
2028     rego->arches = this;
2029   }
2030
2031   /* Check that the newly installed architecture is valid.  Plug in
2032      any post init values.  */
2033   new_gdbarch->dump_tdep = rego->dump_tdep;
2034   verify_gdbarch (new_gdbarch);
2035   new_gdbarch->initialized_p = 1;
2036
2037   if (gdbarch_debug)
2038     gdbarch_dump (new_gdbarch, gdb_stdlog);
2039
2040   return new_gdbarch;
2041 }
2042
2043 struct gdbarch *
2044 gdbarch_find_by_info (struct gdbarch_info info)
2045 {
2046   struct gdbarch *new_gdbarch;
2047
2048   /* Save the previously selected architecture, setting the global to
2049      NULL.  This stops things like gdbarch->init() trying to use the
2050      previous architecture's configuration.  The previous architecture
2051      may not even be of the same architecture family.  The most recent
2052      architecture of the same family is found at the head of the
2053      rego->arches list.  */
2054   struct gdbarch *old_gdbarch = current_gdbarch;
2055   current_gdbarch = NULL;
2056
2057   /* Find the specified architecture.  */
2058   new_gdbarch = find_arch_by_info (info);
2059
2060   /* Restore the existing architecture.  */
2061   gdb_assert (current_gdbarch == NULL);
2062   current_gdbarch = old_gdbarch;
2063
2064   return new_gdbarch;
2065 }
2066
2067 /* Make the specified architecture current.  */
2068
2069 void
2070 deprecated_current_gdbarch_select_hack (struct gdbarch *new_gdbarch)
2071 {
2072   gdb_assert (new_gdbarch != NULL);
2073   gdb_assert (current_gdbarch != NULL);
2074   gdb_assert (new_gdbarch->initialized_p);
2075   current_gdbarch = new_gdbarch;
2076   architecture_changed_event ();
2077   reinit_frame_cache ();
2078 }
2079
2080 extern void _initialize_gdbarch (void);
2081
2082 void
2083 _initialize_gdbarch (void)
2084 {
2085   struct cmd_list_element *c;
2086
2087   add_setshow_zinteger_cmd ("arch", class_maintenance, &gdbarch_debug, _("\\
2088 Set architecture debugging."), _("\\
2089 Show architecture debugging."), _("\\
2090 When non-zero, architecture debugging is enabled."),
2091                             NULL,
2092                             show_gdbarch_debug,
2093                             &setdebuglist, &showdebuglist);
2094 }
2095 EOF
2096
2097 # close things off
2098 exec 1>&2
2099 #../move-if-change new-gdbarch.c gdbarch.c
2100 compare_new gdbarch.c