gdb/gdbarch.sh

   1 #!/bin/sh -u
   2
   3 # Architecture commands for GDB, the GNU debugger.
   4 #
   5 # Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   6 # 2008, 2009 Free Software Foundation, Inc.
   7 #
   8 # This file is part of GDB.
   9 #
  10 # This program is free software; you can redistribute it and/or modify
  11 # it under the terms of the GNU General Public License as published by
  12 # the Free Software Foundation; either version 3 of the License, or
  13 # (at your option) any later version.
  14 #
  15 # This program is distributed in the hope that it will be useful,
  16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 # GNU General Public License for more details.
  19 #
  20 # You should have received a copy of the GNU General Public License
  21 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 # Make certain that the script is not running in an internationalized
  24 # environment.
  25 LANG=c ; export LANG
  26 LC_ALL=c ; export LC_ALL
  27
  28
  29 compare_new ()
  30 {
  31     file=$1
  32     if test ! -r ${file}
  33     then
  34         echo "${file} missing? cp new-${file} ${file}" 1>&2
  35     elif diff -u ${file} new-${file}
  36     then
  37         echo "${file} unchanged" 1>&2
  38     else
  39         echo "${file} has changed? cp new-${file} ${file}" 1>&2
  40     fi
  41 }
  42
  43
  44 # Format of the input table
  45 read="class returntype function formal actual staticdefault predefault postdefault invalid_p print garbage_at_eol"
  46
  47 do_read ()
  48 {
  49     comment=""
  50     class=""
  51     while read line
  52     do
  53         if test "${line}" = ""
  54         then
  55             continue
  56         elif test "${line}" = "#" -a "${comment}" = ""
  57         then
  58             continue
  59         elif expr "${line}" : "#" > /dev/null
  60         then
  61             comment="${comment}
  62 ${line}"
  63         else
  64
  65             # The semantics of IFS varies between different SH's.  Some
  66             # treat ``::' as three fields while some treat it as just too.
  67             # Work around this by eliminating ``::'' ....
  68             line="`echo "${line}" | sed -e 's/::/: :/g' -e 's/::/: :/g'`"
  69
  70             OFS="${IFS}" ; IFS="[:]"
  71             eval read ${read} <<EOF
  72 ${line}
  73 EOF
  74             IFS="${OFS}"
  75
  76             if test -n "${garbage_at_eol}"
  77             then
  78                 echo "Garbage at end-of-line in ${line}" 1>&2
  79                 kill $$
  80                 exit 1
  81             fi
  82
  83             # .... and then going back through each field and strip out those
  84             # that ended up with just that space character.
  85             for r in ${read}
  86             do
  87                 if eval test \"\${${r}}\" = \"\ \"
  88                 then
  89                     eval ${r}=""
  90                 fi
  91             done
  92
  93             case "${class}" in
  94                 m ) staticdefault="${predefault}" ;;
  95                 M ) staticdefault="0" ;;
  96                 * ) test "${staticdefault}" || staticdefault=0 ;;
  97             esac
  98
  99             case "${class}" in
 100             F | V | M )
 101                 case "${invalid_p}" in
 102                 "" )
 103                     if test -n "${predefault}"
 104                     then
 105                         #invalid_p="gdbarch->${function} == ${predefault}"
 106                         predicate="gdbarch->${function} != ${predefault}"
 107                     elif class_is_variable_p
 108                     then
 109                         predicate="gdbarch->${function} != 0"
 110                     elif class_is_function_p
 111                     then
 112                         predicate="gdbarch->${function} != NULL"
 113                     fi
 114                     ;;
 115                 * )
 116                     echo "Predicate function ${function} with invalid_p." 1>&2
 117                     kill $$
 118                     exit 1
 119                     ;;
 120                 esac
 121             esac
 122
 123             # PREDEFAULT is a valid fallback definition of MEMBER when
 124             # multi-arch is not enabled.  This ensures that the
 125             # default value, when multi-arch is the same as the
 126             # default value when not multi-arch.  POSTDEFAULT is
 127             # always a valid definition of MEMBER as this again
 128             # ensures consistency.
 129
 130             if [ -n "${postdefault}" ]
 131             then
 132                 fallbackdefault="${postdefault}"
 133             elif [ -n "${predefault}" ]
 134             then
 135                 fallbackdefault="${predefault}"
 136             else
 137                 fallbackdefault="0"
 138             fi
 139
 140             #NOT YET: See gdbarch.log for basic verification of
 141             # database
 142
 143             break
 144         fi
 145     done
 146     if [ -n "${class}" ]
 147     then
 148         true
 149     else
 150         false
 151     fi
 152 }
 153
 154
 155 fallback_default_p ()
 156 {
 157     [ -n "${postdefault}" -a "x${invalid_p}" != "x0" ] \
 158         || [ -n "${predefault}" -a "x${invalid_p}" = "x0" ]
 159 }
 160
 161 class_is_variable_p ()
 162 {
 163     case "${class}" in
 164         *v* | *V* ) true ;;
 165         * ) false ;;
 166     esac
 167 }
 168
 169 class_is_function_p ()
 170 {
 171     case "${class}" in
 172         *f* | *F* | *m* | *M* ) true ;;
 173         * ) false ;;
 174     esac
 175 }
 176
 177 class_is_multiarch_p ()
 178 {
 179     case "${class}" in
 180         *m* | *M* ) true ;;
 181         * ) false ;;
 182     esac
 183 }
 184
 185 class_is_predicate_p ()
 186 {
 187     case "${class}" in
 188         *F* | *V* | *M* ) true ;;
 189         * ) false ;;
 190     esac
 191 }
 192
 193 class_is_info_p ()
 194 {
 195     case "${class}" in
 196         *i* ) true ;;
 197         * ) false ;;
 198     esac
 199 }
 200
 201
 202 # dump out/verify the doco
 203 for field in ${read}
 204 do
 205   case ${field} in
 206
 207     class ) : ;;
 208
 209         # # -> line disable
 210         # f -> function
 211         #   hiding a function
 212         # F -> function + predicate
 213         #   hiding a function + predicate to test function validity
 214         # v -> variable
 215         #   hiding a variable
 216         # V -> variable + predicate
 217         #   hiding a variable + predicate to test variables validity
 218         # i -> set from info
 219         #   hiding something from the ``struct info'' object
 220         # m -> multi-arch function
 221         #   hiding a multi-arch function (parameterised with the architecture)
 222         # M -> multi-arch function + predicate
 223         #   hiding a multi-arch function + predicate to test function validity
 224
 225     returntype ) : ;;
 226
 227         # For functions, the return type; for variables, the data type
 228
 229     function ) : ;;
 230
 231         # For functions, the member function name; for variables, the
 232         # variable name.  Member function names are always prefixed with
 233         # ``gdbarch_'' for name-space purity.
 234
 235     formal ) : ;;
 236
 237         # The formal argument list.  It is assumed that the formal
 238         # argument list includes the actual name of each list element.
 239         # A function with no arguments shall have ``void'' as the
 240         # formal argument list.
 241
 242     actual ) : ;;
 243
 244         # The list of actual arguments.  The arguments specified shall
 245         # match the FORMAL list given above.  Functions with out
 246         # arguments leave this blank.
 247
 248     staticdefault ) : ;;
 249
 250         # To help with the GDB startup a static gdbarch object is
 251         # created.  STATICDEFAULT is the value to insert into that
 252         # static gdbarch object.  Since this a static object only
 253         # simple expressions can be used.
 254
 255         # If STATICDEFAULT is empty, zero is used.
 256
 257     predefault ) : ;;
 258
 259         # An initial value to assign to MEMBER of the freshly
 260         # malloc()ed gdbarch object.  After initialization, the
 261         # freshly malloc()ed object is passed to the target
 262         # architecture code for further updates.
 263
 264         # If PREDEFAULT is empty, zero is used.
 265
 266         # A non-empty PREDEFAULT, an empty POSTDEFAULT and a zero
 267         # INVALID_P are specified, PREDEFAULT will be used as the
 268         # default for the non- multi-arch target.
 269
 270         # A zero PREDEFAULT function will force the fallback to call
 271         # internal_error().
 272
 273         # Variable declarations can refer to ``gdbarch'' which will
 274         # contain the current architecture.  Care should be taken.
 275
 276     postdefault ) : ;;
 277
 278         # A value to assign to MEMBER of the new gdbarch object should
 279         # the target architecture code fail to change the PREDEFAULT
 280         # value.
 281
 282         # If POSTDEFAULT is empty, no post update is performed.
 283
 284         # If both INVALID_P and POSTDEFAULT are non-empty then
 285         # INVALID_P will be used to determine if MEMBER should be
 286         # changed to POSTDEFAULT.
 287
 288         # If a non-empty POSTDEFAULT and a zero INVALID_P are
 289         # specified, POSTDEFAULT will be used as the default for the
 290         # non- multi-arch target (regardless of the value of
 291         # PREDEFAULT).
 292
 293         # You cannot specify both a zero INVALID_P and a POSTDEFAULT.
 294
 295         # Variable declarations can refer to ``gdbarch'' which
 296         # will contain the current architecture.  Care should be
 297         # taken.
 298
 299     invalid_p ) : ;;
 300
 301         # A predicate equation that validates MEMBER.  Non-zero is
 302         # returned if the code creating the new architecture failed to
 303         # initialize MEMBER or the initialized the member is invalid.
 304         # If POSTDEFAULT is non-empty then MEMBER will be updated to
 305         # that value.  If POSTDEFAULT is empty then internal_error()
 306         # is called.
 307
 308         # If INVALID_P is empty, a check that MEMBER is no longer
 309         # equal to PREDEFAULT is used.
 310
 311         # The expression ``0'' disables the INVALID_P check making
 312         # PREDEFAULT a legitimate value.
 313
 314         # See also PREDEFAULT and POSTDEFAULT.
 315
 316     print ) : ;;
 317
 318         # An optional expression that convers MEMBER to a value
 319         # suitable for formatting using %s.
 320
 321         # If PRINT is empty, core_addr_to_string_nz (for CORE_ADDR)
 322         # or plongest (anything else) is used.
 323
 324     garbage_at_eol ) : ;;
 325
 326         # Catches stray fields.
 327
 328     *)
 329         echo "Bad field ${field}"
 330         exit 1;;
 331   esac
 332 done
 333
 334
 335 function_list ()
 336 {
 337   # See below (DOCO) for description of each field
 338   cat <<EOF
 339 i:const struct bfd_arch_info *:bfd_arch_info:::&bfd_default_arch_struct::::gdbarch_bfd_arch_info (gdbarch)->printable_name
 340 #
 341 i:int:byte_order:::BFD_ENDIAN_BIG
 342 i:int:byte_order_for_code:::BFD_ENDIAN_BIG
 343 #
 344 i:enum gdb_osabi:osabi:::GDB_OSABI_UNKNOWN
 345 #
 346 i:const struct target_desc *:target_desc:::::::host_address_to_string (gdbarch->target_desc)
 347
 348 # The bit byte-order has to do just with numbering of bits in debugging symbols
 349 # and such.  Conceptually, it's quite separate from byte/word byte order.
 350 v:int:bits_big_endian:::1:(gdbarch->byte_order == BFD_ENDIAN_BIG)::0
 351
 352 # Number of bits in a char or unsigned char for the target machine.
 353 # Just like CHAR_BIT in <limits.h> but describes the target machine.
 354 # v:TARGET_CHAR_BIT:int:char_bit::::8 * sizeof (char):8::0:
 355 #
 356 # Number of bits in a short or unsigned short for the target machine.
 357 v:int:short_bit:::8 * sizeof (short):2*TARGET_CHAR_BIT::0
 358 # Number of bits in an int or unsigned int for the target machine.
 359 v:int:int_bit:::8 * sizeof (int):4*TARGET_CHAR_BIT::0
 360 # Number of bits in a long or unsigned long for the target machine.
 361 v:int:long_bit:::8 * sizeof (long):4*TARGET_CHAR_BIT::0
 362 # Number of bits in a long long or unsigned long long for the target
 363 # machine.
 364 v:int:long_long_bit:::8 * sizeof (LONGEST):2*gdbarch->long_bit::0
 365
 366 # The ABI default bit-size and format for "float", "double", and "long
 367 # double".  These bit/format pairs should eventually be combined into
 368 # a single object.  For the moment, just initialize them as a pair.
 369 # Each format describes both the big and little endian layouts (if
 370 # useful).
 371
 372 v:int:float_bit:::8 * sizeof (float):4*TARGET_CHAR_BIT::0
 373 v:const struct floatformat **:float_format:::::floatformats_ieee_single::pformat (gdbarch->float_format)
 374 v:int:double_bit:::8 * sizeof (double):8*TARGET_CHAR_BIT::0
 375 v:const struct floatformat **:double_format:::::floatformats_ieee_double::pformat (gdbarch->double_format)
 376 v:int:long_double_bit:::8 * sizeof (long double):8*TARGET_CHAR_BIT::0
 377 v:const struct floatformat **:long_double_format:::::floatformats_ieee_double::pformat (gdbarch->long_double_format)
 378
 379 # For most targets, a pointer on the target and its representation as an
 380 # address in GDB have the same size and "look the same".  For such a
 381 # target, you need only set gdbarch_ptr_bit and gdbarch_addr_bit
 382 # / addr_bit will be set from it.
 383 #
 384 # If gdbarch_ptr_bit and gdbarch_addr_bit are different, you'll probably
 385 # also need to set gdbarch_pointer_to_address and gdbarch_address_to_pointer
 386 # as well.
 387 #
 388 # ptr_bit is the size of a pointer on the target
 389 v:int:ptr_bit:::8 * sizeof (void*):gdbarch->int_bit::0
 390 # addr_bit is the size of a target address as represented in gdb
 391 v:int:addr_bit:::8 * sizeof (void*):0:gdbarch_ptr_bit (gdbarch):
 392 #
 393 # One if \`char' acts like \`signed char', zero if \`unsigned char'.
 394 v:int:char_signed:::1:-1:1
 395 #
 396 F:CORE_ADDR:read_pc:struct regcache *regcache:regcache
 397 F:void:write_pc:struct regcache *regcache, CORE_ADDR val:regcache, val
 398 # Function for getting target's idea of a frame pointer.  FIXME: GDB's
 399 # whole scheme for dealing with "frames" and "frame pointers" needs a
 400 # serious shakedown.
 401 m:void:virtual_frame_pointer:CORE_ADDR pc, int *frame_regnum, LONGEST *frame_offset:pc, frame_regnum, frame_offset:0:legacy_virtual_frame_pointer::0
 402 #
 403 M:void:pseudo_register_read:struct regcache *regcache, int cookednum, gdb_byte *buf:regcache, cookednum, buf
 404 M:void:pseudo_register_write:struct regcache *regcache, int cookednum, const gdb_byte *buf:regcache, cookednum, buf
 405 #
 406 v:int:num_regs:::0:-1
 407 # This macro gives the number of pseudo-registers that live in the
 408 # register namespace but do not get fetched or stored on the target.
 409 # These pseudo-registers may be aliases for other registers,
 410 # combinations of other registers, or they may be computed by GDB.
 411 v:int:num_pseudo_regs:::0:0::0
 412
 413 # GDB's standard (or well known) register numbers.  These can map onto
 414 # a real register or a pseudo (computed) register or not be defined at
 415 # all (-1).
 416 # gdbarch_sp_regnum will hopefully be replaced by UNWIND_SP.
 417 v:int:sp_regnum:::-1:-1::0
 418 v:int:pc_regnum:::-1:-1::0
 419 v:int:ps_regnum:::-1:-1::0
 420 v:int:fp0_regnum:::0:-1::0
 421 # Convert stab register number (from \`r\' declaration) to a gdb REGNUM.
 422 m:int:stab_reg_to_regnum:int stab_regnr:stab_regnr::no_op_reg_to_regnum::0
 423 # Provide a default mapping from a ecoff register number to a gdb REGNUM.
 424 m:int:ecoff_reg_to_regnum:int ecoff_regnr:ecoff_regnr::no_op_reg_to_regnum::0
 425 # Convert from an sdb register number to an internal gdb register number.
 426 m:int:sdb_reg_to_regnum:int sdb_regnr:sdb_regnr::no_op_reg_to_regnum::0
 427 # Provide a default mapping from a DWARF2 register number to a gdb REGNUM.
 428 m:int:dwarf2_reg_to_regnum:int dwarf2_regnr:dwarf2_regnr::no_op_reg_to_regnum::0
 429 m:const char *:register_name:int regnr:regnr::0
 430
 431 # Return the type of a register specified by the architecture.  Only
 432 # the register cache should call this function directly; others should
 433 # use "register_type".
 434 M:struct type *:register_type:int reg_nr:reg_nr
 435
 436 # See gdbint.texinfo, and PUSH_DUMMY_CALL.
 437 M:struct frame_id:dummy_id:struct frame_info *this_frame:this_frame
 438 # Implement DUMMY_ID and PUSH_DUMMY_CALL, then delete
 439 # deprecated_fp_regnum.
 440 v:int:deprecated_fp_regnum:::-1:-1::0
 441
 442 # See gdbint.texinfo.  See infcall.c.
 443 M:CORE_ADDR:push_dummy_call:struct value *function, struct regcache *regcache, CORE_ADDR bp_addr, int nargs, struct value **args, CORE_ADDR sp, int struct_return, CORE_ADDR struct_addr:function, regcache, bp_addr, nargs, args, sp, struct_return, struct_addr
 444 v:int:call_dummy_location::::AT_ENTRY_POINT::0
 445 M:CORE_ADDR:push_dummy_code:CORE_ADDR sp, CORE_ADDR funaddr, struct value **args, int nargs, struct type *value_type, CORE_ADDR *real_pc, CORE_ADDR *bp_addr, struct regcache *regcache:sp, funaddr, args, nargs, value_type, real_pc, bp_addr, regcache
 446
 447 m:void:print_registers_info:struct ui_file *file, struct frame_info *frame, int regnum, int all:file, frame, regnum, all::default_print_registers_info::0
 448 M:void:print_float_info:struct ui_file *file, struct frame_info *frame, const char *args:file, frame, args
 449 M:void:print_vector_info:struct ui_file *file, struct frame_info *frame, const char *args:file, frame, args
 450 # MAP a GDB RAW register number onto a simulator register number.  See
 451 # also include/...-sim.h.
 452 m:int:register_sim_regno:int reg_nr:reg_nr::legacy_register_sim_regno::0
 453 m:int:cannot_fetch_register:int regnum:regnum::cannot_register_not::0
 454 m:int:cannot_store_register:int regnum:regnum::cannot_register_not::0
 455 # setjmp/longjmp support.
 456 F:int:get_longjmp_target:struct frame_info *frame, CORE_ADDR *pc:frame, pc
 457 #
 458 v:int:believe_pcc_promotion:::::::
 459 #
 460 m:int:convert_register_p:int regnum, struct type *type:regnum, type:0:generic_convert_register_p::0
 461 f:void:register_to_value:struct frame_info *frame, int regnum, struct type *type, gdb_byte *buf:frame, regnum, type, buf:0
 462 f:void:value_to_register:struct frame_info *frame, int regnum, struct type *type, const gdb_byte *buf:frame, regnum, type, buf:0
 463 # Construct a value representing the contents of register REGNUM in
 464 # frame FRAME, interpreted as type TYPE.  The routine needs to
 465 # allocate and return a struct value with all value attributes
 466 # (but not the value contents) filled in.
 467 f:struct value *:value_from_register:struct type *type, int regnum, struct frame_info *frame:type, regnum, frame::default_value_from_register::0
 468 #
 469 f:CORE_ADDR:pointer_to_address:struct type *type, const gdb_byte *buf:type, buf::unsigned_pointer_to_address::0
 470 f:void:address_to_pointer:struct type *type, gdb_byte *buf, CORE_ADDR addr:type, buf, addr::unsigned_address_to_pointer::0
 471 M:CORE_ADDR:integer_to_address:struct type *type, const gdb_byte *buf:type, buf
 472
 473 # Return the return-value convention that will be used by FUNCTYPE
 474 # to return a value of type VALTYPE.  FUNCTYPE may be NULL in which
 475 # case the return convention is computed based only on VALTYPE.
 476 #
 477 # If READBUF is not NULL, extract the return value and save it in this buffer.
 478 #
 479 # If WRITEBUF is not NULL, it contains a return value which will be
 480 # stored into the appropriate register.  This can be used when we want
 481 # to force the value returned by a function (see the "return" command
 482 # for instance).
 483 M:enum return_value_convention:return_value:struct type *functype, struct type *valtype, struct regcache *regcache, gdb_byte *readbuf, const gdb_byte *writebuf:functype, valtype, regcache, readbuf, writebuf
 484
 485 m:CORE_ADDR:skip_prologue:CORE_ADDR ip:ip:0:0
 486 M:CORE_ADDR:skip_main_prologue:CORE_ADDR ip:ip
 487 f:int:inner_than:CORE_ADDR lhs, CORE_ADDR rhs:lhs, rhs:0:0
 488 m:const gdb_byte *:breakpoint_from_pc:CORE_ADDR *pcptr, int *lenptr:pcptr, lenptr::0:
 489 M:CORE_ADDR:adjust_breakpoint_address:CORE_ADDR bpaddr:bpaddr
 490 m:int:memory_insert_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_insert_breakpoint::0
 491 m:int:memory_remove_breakpoint:struct bp_target_info *bp_tgt:bp_tgt:0:default_memory_remove_breakpoint::0
 492 v:CORE_ADDR:decr_pc_after_break:::0:::0
 493
 494 # A function can be addressed by either it's "pointer" (possibly a
 495 # descriptor address) or "entry point" (first executable instruction).
 496 # The method "convert_from_func_ptr_addr" converting the former to the
 497 # latter.  gdbarch_deprecated_function_start_offset is being used to implement
 498 # a simplified subset of that functionality - the function's address
 499 # corresponds to the "function pointer" and the function's start
 500 # corresponds to the "function entry point" - and hence is redundant.
 501
 502 v:CORE_ADDR:deprecated_function_start_offset:::0:::0
 503
 504 # Return the remote protocol register number associated with this
 505 # register.  Normally the identity mapping.
 506 m:int:remote_register_number:int regno:regno::default_remote_register_number::0
 507
 508 # Fetch the target specific address used to represent a load module.
 509 F:CORE_ADDR:fetch_tls_load_module_address:struct objfile *objfile:objfile
 510 #
 511 v:CORE_ADDR:frame_args_skip:::0:::0
 512 M:CORE_ADDR:unwind_pc:struct frame_info *next_frame:next_frame
 513 M:CORE_ADDR:unwind_sp:struct frame_info *next_frame:next_frame
 514 # DEPRECATED_FRAME_LOCALS_ADDRESS as been replaced by the per-frame
 515 # frame-base.  Enable frame-base before frame-unwind.
 516 F:int:frame_num_args:struct frame_info *frame:frame
 517 #
 518 M:CORE_ADDR:frame_align:CORE_ADDR address:address
 519 m:int:stabs_argument_has_addr:struct type *type:type::default_stabs_argument_has_addr::0
 520 v:int:frame_red_zone_size
 521 #
 522 m:CORE_ADDR:convert_from_func_ptr_addr:CORE_ADDR addr, struct target_ops *targ:addr, targ::convert_from_func_ptr_addr_identity::0
 523 # On some machines there are bits in addresses which are not really
 524 # part of the address, but are used by the kernel, the hardware, etc.
 525 # for special purposes.  gdbarch_addr_bits_remove takes out any such bits so
 526 # we get a "real" address such as one would find in a symbol table.
 527 # This is used only for addresses of instructions, and even then I'm
 528 # not sure it's used in all contexts.  It exists to deal with there
 529 # being a few stray bits in the PC which would mislead us, not as some
 530 # sort of generic thing to handle alignment or segmentation (it's
 531 # possible it should be in TARGET_READ_PC instead).
 532 m:CORE_ADDR:addr_bits_remove:CORE_ADDR addr:addr::core_addr_identity::0
 533 # It is not at all clear why gdbarch_smash_text_address is not folded into
 534 # gdbarch_addr_bits_remove.
 535 m:CORE_ADDR:smash_text_address:CORE_ADDR addr:addr::core_addr_identity::0
 536
 537 # FIXME/cagney/2001-01-18: This should be split in two.  A target method that
 538 # indicates if the target needs software single step.  An ISA method to
 539 # implement it.
 540 #
 541 # FIXME/cagney/2001-01-18: This should be replaced with something that inserts
 542 # breakpoints using the breakpoint system instead of blatting memory directly
 543 # (as with rs6000).
 544 #
 545 # FIXME/cagney/2001-01-18: The logic is backwards.  It should be asking if the
 546 # target can single step.  If not, then implement single step using breakpoints.
 547 #
 548 # A return value of 1 means that the software_single_step breakpoints
 549 # were inserted; 0 means they were not.
 550 F:int:software_single_step:struct frame_info *frame:frame
 551
 552 # Return non-zero if the processor is executing a delay slot and a
 553 # further single-step is needed before the instruction finishes.
 554 M:int:single_step_through_delay:struct frame_info *frame:frame
 555 # FIXME: cagney/2003-08-28: Need to find a better way of selecting the
 556 # disassembler.  Perhaps objdump can handle it?
 557 f:int:print_insn:bfd_vma vma, struct disassemble_info *info:vma, info::0:
 558 f:CORE_ADDR:skip_trampoline_code:struct frame_info *frame, CORE_ADDR pc:frame, pc::generic_skip_trampoline_code::0
 559
 560
 561 # If in_solib_dynsym_resolve_code() returns true, and SKIP_SOLIB_RESOLVER
 562 # evaluates non-zero, this is the address where the debugger will place
 563 # a step-resume breakpoint to get us past the dynamic linker.
 564 m:CORE_ADDR:skip_solib_resolver:CORE_ADDR pc:pc::generic_skip_solib_resolver::0
 565 # Some systems also have trampoline code for returning from shared libs.
 566 f:int:in_solib_return_trampoline:CORE_ADDR pc, char *name:pc, name::generic_in_solib_return_trampoline::0
 567
 568 # A target might have problems with watchpoints as soon as the stack
 569 # frame of the current function has been destroyed.  This mostly happens
 570 # as the first action in a funtion's epilogue.  in_function_epilogue_p()
 571 # is defined to return a non-zero value if either the given addr is one
 572 # instruction after the stack destroying instruction up to the trailing
 573 # return instruction or if we can figure out that the stack frame has
 574 # already been invalidated regardless of the value of addr.  Targets
 575 # which don't suffer from that problem could just let this functionality
 576 # untouched.
 577 m:int:in_function_epilogue_p:CORE_ADDR addr:addr:0:generic_in_function_epilogue_p::0
 578 # Given a vector of command-line arguments, return a newly allocated
 579 # string which, when passed to the create_inferior function, will be
 580 # parsed (on Unix systems, by the shell) to yield the same vector.
 581 # This function should call error() if the argument vector is not
 582 # representable for this target or if this target does not support
 583 # command-line arguments.
 584 # ARGC is the number of elements in the vector.
 585 # ARGV is an array of strings, one per argument.
 586 m:char *:construct_inferior_arguments:int argc, char **argv:argc, argv::construct_inferior_arguments::0
 587 f:void:elf_make_msymbol_special:asymbol *sym, struct minimal_symbol *msym:sym, msym::default_elf_make_msymbol_special::0
 588 f:void:coff_make_msymbol_special:int val, struct minimal_symbol *msym:val, msym::default_coff_make_msymbol_special::0
 589 v:int:cannot_step_breakpoint:::0:0::0
 590 v:int:have_nonsteppable_watchpoint:::0:0::0
 591 F:int:address_class_type_flags:int byte_size, int dwarf2_addr_class:byte_size, dwarf2_addr_class
 592 M:const char *:address_class_type_flags_to_name:int type_flags:type_flags
 593 M:int:address_class_name_to_type_flags:const char *name, int *type_flags_ptr:name, type_flags_ptr
 594 # Is a register in a group
 595 m:int:register_reggroup_p:int regnum, struct reggroup *reggroup:regnum, reggroup::default_register_reggroup_p::0
 596 # Fetch the pointer to the ith function argument.
 597 F:CORE_ADDR:fetch_pointer_argument:struct frame_info *frame, int argi, struct type *type:frame, argi, type
 598
 599 # Return the appropriate register set for a core file section with
 600 # name SECT_NAME and size SECT_SIZE.
 601 M:const struct regset *:regset_from_core_section:const char *sect_name, size_t sect_size:sect_name, sect_size
 602
 603 # When creating core dumps, some systems encode the PID in addition
 604 # to the LWP id in core file register section names.  In those cases, the
 605 # "XXX" in ".reg/XXX" is encoded as [LWPID << 16 | PID].  This setting
 606 # is set to true for such architectures; false if "XXX" represents an LWP
 607 # or thread id with no special encoding.
 608 v:int:core_reg_section_encodes_pid:::0:0::0
 609
 610 # Supported register notes in a core file.
 611 v:struct core_regset_section *:core_regset_sections:const char *name, int len::::::host_address_to_string (gdbarch->core_regset_sections)
 612
 613 # Read offset OFFSET of TARGET_OBJECT_LIBRARIES formatted shared libraries list from
 614 # core file into buffer READBUF with length LEN.
 615 M:LONGEST:core_xfer_shared_libraries:gdb_byte *readbuf, ULONGEST offset, LONGEST len:readbuf, offset, len
 616
 617 # How the core_stratum layer converts a PTID from a core file to a
 618 # string.
 619 M:char *:core_pid_to_str:ptid_t ptid:ptid
 620
 621 # If the elements of C++ vtables are in-place function descriptors rather
 622 # than normal function pointers (which may point to code or a descriptor),
 623 # set this to one.
 624 v:int:vtable_function_descriptors:::0:0::0
 625
 626 # Set if the least significant bit of the delta is used instead of the least
 627 # significant bit of the pfn for pointers to virtual member functions.
 628 v:int:vbit_in_delta:::0:0::0
 629
 630 # Advance PC to next instruction in order to skip a permanent breakpoint.
 631 F:void:skip_permanent_breakpoint:struct regcache *regcache:regcache
 632
 633 # The maximum length of an instruction on this architecture.
 634 V:ULONGEST:max_insn_length:::0:0
 635
 636 # Copy the instruction at FROM to TO, and make any adjustments
 637 # necessary to single-step it at that address.
 638 #
 639 # REGS holds the state the thread's registers will have before
 640 # executing the copied instruction; the PC in REGS will refer to FROM,
 641 # not the copy at TO.  The caller should update it to point at TO later.
 642 #
 643 # Return a pointer to data of the architecture's choice to be passed
 644 # to gdbarch_displaced_step_fixup.  Or, return NULL to indicate that
 645 # the instruction's effects have been completely simulated, with the
 646 # resulting state written back to REGS.
 647 #
 648 # For a general explanation of displaced stepping and how GDB uses it,
 649 # see the comments in infrun.c.
 650 #
 651 # The TO area is only guaranteed to have space for
 652 # gdbarch_max_insn_length (arch) bytes, so this function must not
 653 # write more bytes than that to that area.
 654 #
 655 # If you do not provide this function, GDB assumes that the
 656 # architecture does not support displaced stepping.
 657 #
 658 # If your architecture doesn't need to adjust instructions before
 659 # single-stepping them, consider using simple_displaced_step_copy_insn
 660 # here.
 661 M:struct displaced_step_closure *:displaced_step_copy_insn:CORE_ADDR from, CORE_ADDR to, struct regcache *regs:from, to, regs
 662
 663 # Fix up the state resulting from successfully single-stepping a
 664 # displaced instruction, to give the result we would have gotten from
 665 # stepping the instruction in its original location.
 666 #
 667 # REGS is the register state resulting from single-stepping the
 668 # displaced instruction.
 669 #
 670 # CLOSURE is the result from the matching call to
 671 # gdbarch_displaced_step_copy_insn.
 672 #
 673 # If you provide gdbarch_displaced_step_copy_insn.but not this
 674 # function, then GDB assumes that no fixup is needed after
 675 # single-stepping the instruction.
 676 #
 677 # For a general explanation of displaced stepping and how GDB uses it,
 678 # see the comments in infrun.c.
 679 M:void:displaced_step_fixup:struct displaced_step_closure *closure, CORE_ADDR from, CORE_ADDR to, struct regcache *regs:closure, from, to, regs::NULL
 680
 681 # Free a closure returned by gdbarch_displaced_step_copy_insn.
 682 #
 683 # If you provide gdbarch_displaced_step_copy_insn, you must provide
 684 # this function as well.
 685 #
 686 # If your architecture uses closures that don't need to be freed, then
 687 # you can use simple_displaced_step_free_closure here.
 688 #
 689 # For a general explanation of displaced stepping and how GDB uses it,
 690 # see the comments in infrun.c.
 691 m:void:displaced_step_free_closure:struct displaced_step_closure *closure:closure::NULL::(! gdbarch->displaced_step_free_closure) != (! gdbarch->displaced_step_copy_insn)
 692
 693 # Return the address of an appropriate place to put displaced
 694 # instructions while we step over them.  There need only be one such
 695 # place, since we're only stepping one thread over a breakpoint at a
 696 # time.
 697 #
 698 # For a general explanation of displaced stepping and how GDB uses it,
 699 # see the comments in infrun.c.
 700 m:CORE_ADDR:displaced_step_location:void:::NULL::(! gdbarch->displaced_step_location) != (! gdbarch->displaced_step_copy_insn)
 701
 702 # Refresh overlay mapped state for section OSECT.
 703 F:void:overlay_update:struct obj_section *osect:osect
 704
 705 M:const struct target_desc *:core_read_description:struct target_ops *target, bfd *abfd:target, abfd
 706
 707 # Handle special encoding of static variables in stabs debug info.
 708 F:char *:static_transform_name:char *name:name
 709 # Set if the address in N_SO or N_FUN stabs may be zero.
 710 v:int:sofun_address_maybe_missing:::0:0::0
 711
 712 # Parse the instruction at ADDR storing in the record execution log
 713 # the registers REGCACHE and memory ranges that will be affected when
 714 # the instruction executes, along with their current values.
 715 # Return -1 if something goes wrong, 0 otherwise.
 716 M:int:process_record:struct regcache *regcache, CORE_ADDR addr:regcache, addr
 717
 718 # Signal translation: translate inferior's signal (host's) number into
 719 # GDB's representation.
 720 m:enum target_signal:target_signal_from_host:int signo:signo::default_target_signal_from_host::0
 721 # Signal translation: translate GDB's signal number into inferior's host
 722 # signal number.
 723 m:int:target_signal_to_host:enum target_signal ts:ts::default_target_signal_to_host::0
 724
 725 # Extra signal info inspection.
 726 #
 727 # Return a type suitable to inspect extra signal information.
 728 M:struct type *:get_siginfo_type:void:
 729
 730 # Record architecture-specific information from the symbol table.
 731 M:void:record_special_symbol:struct objfile *objfile, asymbol *sym:objfile, sym
 732
 733 # True if the list of shared libraries is one and only for all
 734 # processes, as opposed to a list of shared libraries per inferior.
 735 # This usually means that all processes, although may or may not share
 736 # an address space, will see the same set of symbols at the same
 737 # addresses.
 738 v:int:has_global_solist:::0:0::0
 739
 740 # On some targets, even though each inferior has its own private
 741 # address space, the debug interface takes care of making breakpoints
 742 # visible to all address spaces automatically.  For such cases,
 743 # this property should be set to true.
 744 v:int:has_global_breakpoints:::0:0::0
 745 EOF
 746 }
 747
 748 #
 749 # The .log file
 750 #
 751 exec > new-gdbarch.log
 752 function_list | while do_read
 753 do
 754     cat <<EOF
 755 ${class} ${returntype} ${function} ($formal)
 756 EOF
 757     for r in ${read}
 758     do
 759         eval echo \"\ \ \ \ ${r}=\${${r}}\"
 760     done
 761     if class_is_predicate_p && fallback_default_p
 762     then
 763         echo "Error: predicate function ${function} can not have a non- multi-arch default" 1>&2
 764         kill $$
 765         exit 1
 766     fi
 767     if [ "x${invalid_p}" = "x0" -a -n "${postdefault}" ]
 768     then
 769         echo "Error: postdefault is useless when invalid_p=0" 1>&2
 770         kill $$
 771         exit 1
 772     fi
 773     if class_is_multiarch_p
 774     then
 775         if class_is_predicate_p ; then :
 776         elif test "x${predefault}" = "x"
 777         then
 778             echo "Error: pure multi-arch function ${function} must have a predefault" 1>&2
 779             kill $$
 780             exit 1
 781         fi
 782     fi
 783     echo ""
 784 done
 785
 786 exec 1>&2
 787 compare_new gdbarch.log
 788
 789
 790 copyright ()
 791 {
 792 cat <<EOF
 793 /* *INDENT-OFF* */ /* THIS FILE IS GENERATED */
 794
 795 /* Dynamic architecture support for GDB, the GNU debugger.
 796
 797    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
 798    Free Software Foundation, Inc.
 799
 800    This file is part of GDB.
 801
 802    This program is free software; you can redistribute it and/or modify
 803    it under the terms of the GNU General Public License as published by
 804    the Free Software Foundation; either version 3 of the License, or
 805    (at your option) any later version.
 806
 807    This program is distributed in the hope that it will be useful,
 808    but WITHOUT ANY WARRANTY; without even the implied warranty of
 809    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 810    GNU General Public License for more details.
 811
 812    You should have received a copy of the GNU General Public License
 813    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 814
 815 /* This file was created with the aid of \`\`gdbarch.sh''.
 816
 817    The Bourne shell script \`\`gdbarch.sh'' creates the files
 818    \`\`new-gdbarch.c'' and \`\`new-gdbarch.h and then compares them
 819    against the existing \`\`gdbarch.[hc]''.  Any differences found
 820    being reported.
 821
 822    If editing this file, please also run gdbarch.sh and merge any
 823    changes into that script. Conversely, when making sweeping changes
 824    to this file, modifying gdbarch.sh and using its output may prove
 825    easier. */
 826
 827 EOF
 828 }
 829
 830 #
 831 # The .h file
 832 #
 833
 834 exec > new-gdbarch.h
 835 copyright
 836 cat <<EOF
 837 #ifndef GDBARCH_H
 838 #define GDBARCH_H
 839
 840 struct floatformat;
 841 struct ui_file;
 842 struct frame_info;
 843 struct value;
 844 struct objfile;
 845 struct obj_section;
 846 struct minimal_symbol;
 847 struct regcache;
 848 struct reggroup;
 849 struct regset;
 850 struct disassemble_info;
 851 struct target_ops;
 852 struct obstack;
 853 struct bp_target_info;
 854 struct target_desc;
 855 struct displaced_step_closure;
 856 struct core_regset_section;
 857
 858 extern struct gdbarch *current_gdbarch;
 859
 860 /* The architecture associated with the connection to the target.
 861
 862    The architecture vector provides some information that is really
 863    a property of the target: The layout of certain packets, for instance;
 864    or the solib_ops vector.  Etc.  To differentiate architecture accesses
 865    to per-target properties from per-thread/per-frame/per-objfile properties,
 866    accesses to per-target properties should be made through target_gdbarch.
 867
 868    Eventually, when support for multiple targets is implemented in
 869    GDB, this global should be made target-specific.  */
 870 extern struct gdbarch *target_gdbarch;
 871 EOF
 872
 873 # function typedef's
 874 printf "\n"
 875 printf "\n"
 876 printf "/* The following are pre-initialized by GDBARCH. */\n"
 877 function_list | while do_read
 878 do
 879     if class_is_info_p
 880     then
 881         printf "\n"
 882         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 883         printf "/* set_gdbarch_${function}() - not applicable - pre-initialized. */\n"
 884     fi
 885 done
 886
 887 # function typedef's
 888 printf "\n"
 889 printf "\n"
 890 printf "/* The following are initialized by the target dependent code. */\n"
 891 function_list | while do_read
 892 do
 893     if [ -n "${comment}" ]
 894     then
 895         echo "${comment}" | sed \
 896             -e '2 s,#,/*,' \
 897             -e '3,$ s,#,  ,' \
 898             -e '$ s,$, */,'
 899     fi
 900
 901     if class_is_predicate_p
 902     then
 903         printf "\n"
 904         printf "extern int gdbarch_${function}_p (struct gdbarch *gdbarch);\n"
 905     fi
 906     if class_is_variable_p
 907     then
 908         printf "\n"
 909         printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 910         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, ${returntype} ${function});\n"
 911     fi
 912     if class_is_function_p
 913     then
 914         printf "\n"
 915         if [ "x${formal}" = "xvoid" ] && class_is_multiarch_p
 916         then
 917             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch);\n"
 918         elif class_is_multiarch_p
 919         then
 920             printf "typedef ${returntype} (gdbarch_${function}_ftype) (struct gdbarch *gdbarch, ${formal});\n"
 921         else
 922             printf "typedef ${returntype} (gdbarch_${function}_ftype) (${formal});\n"
 923         fi
 924         if [ "x${formal}" = "xvoid" ]
 925         then
 926           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch);\n"
 927         else
 928           printf "extern ${returntype} gdbarch_${function} (struct gdbarch *gdbarch, ${formal});\n"
 929         fi
 930         printf "extern void set_gdbarch_${function} (struct gdbarch *gdbarch, gdbarch_${function}_ftype *${function});\n"
 931     fi
 932 done
 933
 934 # close it off
 935 cat <<EOF
 936
 937 extern struct gdbarch_tdep *gdbarch_tdep (struct gdbarch *gdbarch);
 938
 939
 940 /* Mechanism for co-ordinating the selection of a specific
 941    architecture.
 942
 943    GDB targets (*-tdep.c) can register an interest in a specific
 944    architecture.  Other GDB components can register a need to maintain
 945    per-architecture data.
 946
 947    The mechanisms below ensures that there is only a loose connection
 948    between the set-architecture command and the various GDB
 949    components.  Each component can independently register their need
 950    to maintain architecture specific data with gdbarch.
 951
 952    Pragmatics:
 953
 954    Previously, a single TARGET_ARCHITECTURE_HOOK was provided.  It
 955    didn't scale.
 956
 957    The more traditional mega-struct containing architecture specific
 958    data for all the various GDB components was also considered.  Since
 959    GDB is built from a variable number of (fairly independent)
 960    components it was determined that the global aproach was not
 961    applicable. */
 962
 963
 964 /* Register a new architectural family with GDB.
 965
 966    Register support for the specified ARCHITECTURE with GDB.  When
 967    gdbarch determines that the specified architecture has been
 968    selected, the corresponding INIT function is called.
 969
 970    --
 971
 972    The INIT function takes two parameters: INFO which contains the
 973    information available to gdbarch about the (possibly new)
 974    architecture; ARCHES which is a list of the previously created
 975    \`\`struct gdbarch'' for this architecture.
 976
 977    The INFO parameter is, as far as possible, be pre-initialized with
 978    information obtained from INFO.ABFD or the global defaults.
 979
 980    The ARCHES parameter is a linked list (sorted most recently used)
 981    of all the previously created architures for this architecture
 982    family.  The (possibly NULL) ARCHES->gdbarch can used to access
 983    values from the previously selected architecture for this
 984    architecture family.  The global \`\`current_gdbarch'' shall not be
 985    used.
 986
 987    The INIT function shall return any of: NULL - indicating that it
 988    doesn't recognize the selected architecture; an existing \`\`struct
 989    gdbarch'' from the ARCHES list - indicating that the new
 990    architecture is just a synonym for an earlier architecture (see
 991    gdbarch_list_lookup_by_info()); a newly created \`\`struct gdbarch''
 992    - that describes the selected architecture (see gdbarch_alloc()).
 993
 994    The DUMP_TDEP function shall print out all target specific values.
 995    Care should be taken to ensure that the function works in both the
 996    multi-arch and non- multi-arch cases. */
 997
 998 struct gdbarch_list
 999 {
1000   struct gdbarch *gdbarch;
1001   struct gdbarch_list *next;
1002 };
1003
1004 struct gdbarch_info
1005 {
1006   /* Use default: NULL (ZERO). */
1007   const struct bfd_arch_info *bfd_arch_info;
1008
1009   /* Use default: BFD_ENDIAN_UNKNOWN (NB: is not ZERO).  */
1010   int byte_order;
1011
1012   int byte_order_for_code;
1013
1014   /* Use default: NULL (ZERO). */
1015   bfd *abfd;
1016
1017   /* Use default: NULL (ZERO). */
1018   struct gdbarch_tdep_info *tdep_info;
1019
1020   /* Use default: GDB_OSABI_UNINITIALIZED (-1).  */
1021   enum gdb_osabi osabi;
1022
1023   /* Use default: NULL (ZERO).  */
1024   const struct target_desc *target_desc;
1025 };
1026
1027 typedef struct gdbarch *(gdbarch_init_ftype) (struct gdbarch_info info, struct gdbarch_list *arches);
1028 typedef void (gdbarch_dump_tdep_ftype) (struct gdbarch *gdbarch, struct ui_file *file);
1029
1030 /* DEPRECATED - use gdbarch_register() */
1031 extern void register_gdbarch_init (enum bfd_architecture architecture, gdbarch_init_ftype *);
1032
1033 extern void gdbarch_register (enum bfd_architecture architecture,
1034                               gdbarch_init_ftype *,
1035                               gdbarch_dump_tdep_ftype *);
1036
1037
1038 /* Return a freshly allocated, NULL terminated, array of the valid
1039    architecture names.  Since architectures are registered during the
1040    _initialize phase this function only returns useful information
1041    once initialization has been completed. */
1042
1043 extern const char **gdbarch_printable_names (void);
1044
1045
1046 /* Helper function.  Search the list of ARCHES for a GDBARCH that
1047    matches the information provided by INFO. */
1048
1049 extern struct gdbarch_list *gdbarch_list_lookup_by_info (struct gdbarch_list *arches, const struct gdbarch_info *info);
1050
1051
1052 /* Helper function.  Create a preliminary \`\`struct gdbarch''.  Perform
1053    basic initialization using values obtained from the INFO and TDEP
1054    parameters.  set_gdbarch_*() functions are called to complete the
1055    initialization of the object. */
1056
1057 extern struct gdbarch *gdbarch_alloc (const struct gdbarch_info *info, struct gdbarch_tdep *tdep);
1058
1059
1060 /* Helper function.  Free a partially-constructed \`\`struct gdbarch''.
1061    It is assumed that the caller freeds the \`\`struct
1062    gdbarch_tdep''. */
1063
1064 extern void gdbarch_free (struct gdbarch *);
1065
1066
1067 /* Helper function.  Allocate memory from the \`\`struct gdbarch''
1068    obstack.  The memory is freed when the corresponding architecture
1069    is also freed.  */
1070
1071 extern void *gdbarch_obstack_zalloc (struct gdbarch *gdbarch, long size);
1072 #define GDBARCH_OBSTACK_CALLOC(GDBARCH, NR, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), (NR) * sizeof (TYPE)))
1073 #define GDBARCH_OBSTACK_ZALLOC(GDBARCH, TYPE) ((TYPE *) gdbarch_obstack_zalloc ((GDBARCH), sizeof (TYPE)))
1074
1075
1076 /* Helper function. Force an update of the current architecture.
1077
1078    The actual architecture selected is determined by INFO, \`\`(gdb) set
1079    architecture'' et.al., the existing architecture and BFD's default
1080    architecture.  INFO should be initialized to zero and then selected
1081    fields should be updated.
1082
1083    Returns non-zero if the update succeeds */
1084
1085 extern int gdbarch_update_p (struct gdbarch_info info);
1086
1087
1088 /* Helper function.  Find an architecture matching info.
1089
1090    INFO should be initialized using gdbarch_info_init, relevant fields
1091    set, and then finished using gdbarch_info_fill.
1092
1093    Returns the corresponding architecture, or NULL if no matching
1094    architecture was found.  "current_gdbarch" is not updated.  */
1095
1096 extern struct gdbarch *gdbarch_find_by_info (struct gdbarch_info info);
1097
1098
1099 /* Helper function.  Set the global "current_gdbarch" to "gdbarch".
1100
1101    FIXME: kettenis/20031124: Of the functions that follow, only
1102    gdbarch_from_bfd is supposed to survive.  The others will
1103    dissappear since in the future GDB will (hopefully) be truly
1104    multi-arch.  However, for now we're still stuck with the concept of
1105    a single active architecture.  */
1106
1107 extern void deprecated_current_gdbarch_select_hack (struct gdbarch *gdbarch);
1108
1109
1110 /* Register per-architecture data-pointer.
1111
1112    Reserve space for a per-architecture data-pointer.  An identifier
1113    for the reserved data-pointer is returned.  That identifer should
1114    be saved in a local static variable.
1115
1116    Memory for the per-architecture data shall be allocated using
1117    gdbarch_obstack_zalloc.  That memory will be deleted when the
1118    corresponding architecture object is deleted.
1119
1120    When a previously created architecture is re-selected, the
1121    per-architecture data-pointer for that previous architecture is
1122    restored.  INIT() is not re-called.
1123
1124    Multiple registrarants for any architecture are allowed (and
1125    strongly encouraged).  */
1126
1127 struct gdbarch_data;
1128
1129 typedef void *(gdbarch_data_pre_init_ftype) (struct obstack *obstack);
1130 extern struct gdbarch_data *gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *init);
1131 typedef void *(gdbarch_data_post_init_ftype) (struct gdbarch *gdbarch);
1132 extern struct gdbarch_data *gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *init);
1133 extern void deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1134                                          struct gdbarch_data *data,
1135                                          void *pointer);
1136
1137 extern void *gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *);
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 "reggroups.h"
1183 #include "osabi.h"
1184 #include "gdb_obstack.h"
1185 #include "observer.h"
1186 #include "regcache.h"
1187
1188 /* Static function declarations */
1189
1190 static void alloc_gdbarch_data (struct gdbarch *);
1191
1192 /* Non-zero if we want to trace architecture code.  */
1193
1194 #ifndef GDBARCH_DEBUG
1195 #define GDBARCH_DEBUG 0
1196 #endif
1197 int gdbarch_debug = GDBARCH_DEBUG;
1198 static void
1199 show_gdbarch_debug (struct ui_file *file, int from_tty,
1200                     struct cmd_list_element *c, const char *value)
1201 {
1202   fprintf_filtered (file, _("Architecture debugging is %s.\\n"), value);
1203 }
1204
1205 static const char *
1206 pformat (const struct floatformat **format)
1207 {
1208   if (format == NULL)
1209     return "(null)";
1210   else
1211     /* Just print out one of them - this is only for diagnostics.  */
1212     return format[0]->name;
1213 }
1214
1215 EOF
1216
1217 # gdbarch open the gdbarch object
1218 printf "\n"
1219 printf "/* Maintain the struct gdbarch object */\n"
1220 printf "\n"
1221 printf "struct gdbarch\n"
1222 printf "{\n"
1223 printf "  /* Has this architecture been fully initialized?  */\n"
1224 printf "  int initialized_p;\n"
1225 printf "\n"
1226 printf "  /* An obstack bound to the lifetime of the architecture.  */\n"
1227 printf "  struct obstack *obstack;\n"
1228 printf "\n"
1229 printf "  /* basic architectural information */\n"
1230 function_list | while do_read
1231 do
1232     if class_is_info_p
1233     then
1234         printf "  ${returntype} ${function};\n"
1235     fi
1236 done
1237 printf "\n"
1238 printf "  /* target specific vector. */\n"
1239 printf "  struct gdbarch_tdep *tdep;\n"
1240 printf "  gdbarch_dump_tdep_ftype *dump_tdep;\n"
1241 printf "\n"
1242 printf "  /* per-architecture data-pointers */\n"
1243 printf "  unsigned nr_data;\n"
1244 printf "  void **data;\n"
1245 printf "\n"
1246 printf "  /* per-architecture swap-regions */\n"
1247 printf "  struct gdbarch_swap *swap;\n"
1248 printf "\n"
1249 cat <<EOF
1250   /* Multi-arch values.
1251
1252      When extending this structure you must:
1253
1254      Add the field below.
1255
1256      Declare set/get functions and define the corresponding
1257      macro in gdbarch.h.
1258
1259      gdbarch_alloc(): If zero/NULL is not a suitable default,
1260      initialize the new field.
1261
1262      verify_gdbarch(): Confirm that the target updated the field
1263      correctly.
1264
1265      gdbarch_dump(): Add a fprintf_unfiltered call so that the new
1266      field is dumped out
1267
1268      \`\`startup_gdbarch()'': Append an initial value to the static
1269      variable (base values on the host's c-type system).
1270
1271      get_gdbarch(): Implement the set/get functions (probably using
1272      the macro's as shortcuts).
1273
1274      */
1275
1276 EOF
1277 function_list | while do_read
1278 do
1279     if class_is_variable_p
1280     then
1281         printf "  ${returntype} ${function};\n"
1282     elif class_is_function_p
1283     then
1284         printf "  gdbarch_${function}_ftype *${function};\n"
1285     fi
1286 done
1287 printf "};\n"
1288
1289 # A pre-initialized vector
1290 printf "\n"
1291 printf "\n"
1292 cat <<EOF
1293 /* The default architecture uses host values (for want of a better
1294    choice). */
1295 EOF
1296 printf "\n"
1297 printf "extern const struct bfd_arch_info bfd_default_arch_struct;\n"
1298 printf "\n"
1299 printf "struct gdbarch startup_gdbarch =\n"
1300 printf "{\n"
1301 printf "  1, /* Always initialized.  */\n"
1302 printf "  NULL, /* The obstack.  */\n"
1303 printf "  /* basic architecture information */\n"
1304 function_list | while do_read
1305 do
1306     if class_is_info_p
1307     then
1308         printf "  ${staticdefault},  /* ${function} */\n"
1309     fi
1310 done
1311 cat <<EOF
1312   /* target specific vector and its dump routine */
1313   NULL, NULL,
1314   /*per-architecture data-pointers and swap regions */
1315   0, NULL, NULL,
1316   /* Multi-arch values */
1317 EOF
1318 function_list | while do_read
1319 do
1320     if class_is_function_p || class_is_variable_p
1321     then
1322         printf "  ${staticdefault},  /* ${function} */\n"
1323     fi
1324 done
1325 cat <<EOF
1326   /* startup_gdbarch() */
1327 };
1328
1329 struct gdbarch *current_gdbarch = &startup_gdbarch;
1330 struct gdbarch *target_gdbarch = &startup_gdbarch;
1331 EOF
1332
1333 # Create a new gdbarch struct
1334 cat <<EOF
1335
1336 /* Create a new \`\`struct gdbarch'' based on information provided by
1337    \`\`struct gdbarch_info''. */
1338 EOF
1339 printf "\n"
1340 cat <<EOF
1341 struct gdbarch *
1342 gdbarch_alloc (const struct gdbarch_info *info,
1343                struct gdbarch_tdep *tdep)
1344 {
1345   struct gdbarch *gdbarch;
1346
1347   /* Create an obstack for allocating all the per-architecture memory,
1348      then use that to allocate the architecture vector.  */
1349   struct obstack *obstack = XMALLOC (struct obstack);
1350   obstack_init (obstack);
1351   gdbarch = obstack_alloc (obstack, sizeof (*gdbarch));
1352   memset (gdbarch, 0, sizeof (*gdbarch));
1353   gdbarch->obstack = obstack;
1354
1355   alloc_gdbarch_data (gdbarch);
1356
1357   gdbarch->tdep = tdep;
1358 EOF
1359 printf "\n"
1360 function_list | while do_read
1361 do
1362     if class_is_info_p
1363     then
1364         printf "  gdbarch->${function} = info->${function};\n"
1365     fi
1366 done
1367 printf "\n"
1368 printf "  /* Force the explicit initialization of these. */\n"
1369 function_list | while do_read
1370 do
1371     if class_is_function_p || class_is_variable_p
1372     then
1373         if [ -n "${predefault}" -a "x${predefault}" != "x0" ]
1374         then
1375           printf "  gdbarch->${function} = ${predefault};\n"
1376         fi
1377     fi
1378 done
1379 cat <<EOF
1380   /* gdbarch_alloc() */
1381
1382   return gdbarch;
1383 }
1384 EOF
1385
1386 # Free a gdbarch struct.
1387 printf "\n"
1388 printf "\n"
1389 cat <<EOF
1390 /* Allocate extra space using the per-architecture obstack.  */
1391
1392 void *
1393 gdbarch_obstack_zalloc (struct gdbarch *arch, long size)
1394 {
1395   void *data = obstack_alloc (arch->obstack, size);
1396   memset (data, 0, size);
1397   return data;
1398 }
1399
1400
1401 /* Free a gdbarch struct.  This should never happen in normal
1402    operation --- once you've created a gdbarch, you keep it around.
1403    However, if an architecture's init function encounters an error
1404    building the structure, it may need to clean up a partially
1405    constructed gdbarch.  */
1406
1407 void
1408 gdbarch_free (struct gdbarch *arch)
1409 {
1410   struct obstack *obstack;
1411   gdb_assert (arch != NULL);
1412   gdb_assert (!arch->initialized_p);
1413   obstack = arch->obstack;
1414   obstack_free (obstack, 0); /* Includes the ARCH.  */
1415   xfree (obstack);
1416 }
1417 EOF
1418
1419 # verify a new architecture
1420 cat <<EOF
1421
1422
1423 /* Ensure that all values in a GDBARCH are reasonable.  */
1424
1425 static void
1426 verify_gdbarch (struct gdbarch *gdbarch)
1427 {
1428   struct ui_file *log;
1429   struct cleanup *cleanups;
1430   long dummy;
1431   char *buf;
1432   log = mem_fileopen ();
1433   cleanups = make_cleanup_ui_file_delete (log);
1434   /* fundamental */
1435   if (gdbarch->byte_order == BFD_ENDIAN_UNKNOWN)
1436     fprintf_unfiltered (log, "\n\tbyte-order");
1437   if (gdbarch->bfd_arch_info == NULL)
1438     fprintf_unfiltered (log, "\n\tbfd_arch_info");
1439   /* Check those that need to be defined for the given multi-arch level. */
1440 EOF
1441 function_list | while do_read
1442 do
1443     if class_is_function_p || class_is_variable_p
1444     then
1445         if [ "x${invalid_p}" = "x0" ]
1446         then
1447             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1448         elif class_is_predicate_p
1449         then
1450             printf "  /* Skip verify of ${function}, has predicate */\n"
1451         # FIXME: See do_read for potential simplification
1452         elif [ -n "${invalid_p}" -a -n "${postdefault}" ]
1453         then
1454             printf "  if (${invalid_p})\n"
1455             printf "    gdbarch->${function} = ${postdefault};\n"
1456         elif [ -n "${predefault}" -a -n "${postdefault}" ]
1457         then
1458             printf "  if (gdbarch->${function} == ${predefault})\n"
1459             printf "    gdbarch->${function} = ${postdefault};\n"
1460         elif [ -n "${postdefault}" ]
1461         then
1462             printf "  if (gdbarch->${function} == 0)\n"
1463             printf "    gdbarch->${function} = ${postdefault};\n"
1464         elif [ -n "${invalid_p}" ]
1465         then
1466             printf "  if (${invalid_p})\n"
1467             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1468         elif [ -n "${predefault}" ]
1469         then
1470             printf "  if (gdbarch->${function} == ${predefault})\n"
1471             printf "    fprintf_unfiltered (log, \"\\\\n\\\\t${function}\");\n"
1472         fi
1473     fi
1474 done
1475 cat <<EOF
1476   buf = ui_file_xstrdup (log, &dummy);
1477   make_cleanup (xfree, buf);
1478   if (strlen (buf) > 0)
1479     internal_error (__FILE__, __LINE__,
1480                     _("verify_gdbarch: the following are invalid ...%s"),
1481                     buf);
1482   do_cleanups (cleanups);
1483 }
1484 EOF
1485
1486 # dump the structure
1487 printf "\n"
1488 printf "\n"
1489 cat <<EOF
1490 /* Print out the details of the current architecture. */
1491
1492 void
1493 gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
1494 {
1495   const char *gdb_nm_file = "<not-defined>";
1496 #if defined (GDB_NM_FILE)
1497   gdb_nm_file = GDB_NM_FILE;
1498 #endif
1499   fprintf_unfiltered (file,
1500                       "gdbarch_dump: GDB_NM_FILE = %s\\n",
1501                       gdb_nm_file);
1502 EOF
1503 function_list | sort -t: -k 3 | while do_read
1504 do
1505     # First the predicate
1506     if class_is_predicate_p
1507     then
1508         printf "  fprintf_unfiltered (file,\n"
1509         printf "                      \"gdbarch_dump: gdbarch_${function}_p() = %%d\\\\n\",\n"
1510         printf "                      gdbarch_${function}_p (gdbarch));\n"
1511     fi
1512     # Print the corresponding value.
1513     if class_is_function_p
1514     then
1515         printf "  fprintf_unfiltered (file,\n"
1516         printf "                      \"gdbarch_dump: ${function} = <%%s>\\\\n\",\n"
1517         printf "                      host_address_to_string (gdbarch->${function}));\n"
1518     else
1519         # It is a variable
1520         case "${print}:${returntype}" in
1521             :CORE_ADDR )
1522                 fmt="%s"
1523                 print="core_addr_to_string_nz (gdbarch->${function})"
1524                 ;;
1525             :* )
1526                 fmt="%s"
1527                 print="plongest (gdbarch->${function})"
1528                 ;;
1529             * )
1530                 fmt="%s"
1531                 ;;
1532         esac
1533         printf "  fprintf_unfiltered (file,\n"
1534         printf "                      \"gdbarch_dump: ${function} = %s\\\\n\",\n" "${fmt}"
1535         printf "                      ${print});\n"
1536     fi
1537 done
1538 cat <<EOF
1539   if (gdbarch->dump_tdep != NULL)
1540     gdbarch->dump_tdep (gdbarch, file);
1541 }
1542 EOF
1543
1544
1545 # GET/SET
1546 printf "\n"
1547 cat <<EOF
1548 struct gdbarch_tdep *
1549 gdbarch_tdep (struct gdbarch *gdbarch)
1550 {
1551   if (gdbarch_debug >= 2)
1552     fprintf_unfiltered (gdb_stdlog, "gdbarch_tdep called\\n");
1553   return gdbarch->tdep;
1554 }
1555 EOF
1556 printf "\n"
1557 function_list | while do_read
1558 do
1559     if class_is_predicate_p
1560     then
1561         printf "\n"
1562         printf "int\n"
1563         printf "gdbarch_${function}_p (struct gdbarch *gdbarch)\n"
1564         printf "{\n"
1565         printf "  gdb_assert (gdbarch != NULL);\n"
1566         printf "  return ${predicate};\n"
1567         printf "}\n"
1568     fi
1569     if class_is_function_p
1570     then
1571         printf "\n"
1572         printf "${returntype}\n"
1573         if [ "x${formal}" = "xvoid" ]
1574         then
1575           printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1576         else
1577           printf "gdbarch_${function} (struct gdbarch *gdbarch, ${formal})\n"
1578         fi
1579         printf "{\n"
1580         printf "  gdb_assert (gdbarch != NULL);\n"
1581         printf "  gdb_assert (gdbarch->${function} != NULL);\n"
1582         if class_is_predicate_p && test -n "${predefault}"
1583         then
1584             # Allow a call to a function with a predicate.
1585             printf "  /* Do not check predicate: ${predicate}, allow call.  */\n"
1586         fi
1587         printf "  if (gdbarch_debug >= 2)\n"
1588         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1589         if [ "x${actual}" = "x-" -o "x${actual}" = "x" ]
1590         then
1591             if class_is_multiarch_p
1592             then
1593                 params="gdbarch"
1594             else
1595                 params=""
1596             fi
1597         else
1598             if class_is_multiarch_p
1599             then
1600                 params="gdbarch, ${actual}"
1601             else
1602                 params="${actual}"
1603             fi
1604         fi
1605         if [ "x${returntype}" = "xvoid" ]
1606         then
1607           printf "  gdbarch->${function} (${params});\n"
1608         else
1609           printf "  return gdbarch->${function} (${params});\n"
1610         fi
1611         printf "}\n"
1612         printf "\n"
1613         printf "void\n"
1614         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1615         printf "            `echo ${function} | sed -e 's/./ /g'`  gdbarch_${function}_ftype ${function})\n"
1616         printf "{\n"
1617         printf "  gdbarch->${function} = ${function};\n"
1618         printf "}\n"
1619     elif class_is_variable_p
1620     then
1621         printf "\n"
1622         printf "${returntype}\n"
1623         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1624         printf "{\n"
1625         printf "  gdb_assert (gdbarch != NULL);\n"
1626         if [ "x${invalid_p}" = "x0" ]
1627         then
1628             printf "  /* Skip verify of ${function}, invalid_p == 0 */\n"
1629         elif [ -n "${invalid_p}" ]
1630         then
1631             printf "  /* Check variable is valid.  */\n"
1632             printf "  gdb_assert (!(${invalid_p}));\n"
1633         elif [ -n "${predefault}" ]
1634         then
1635             printf "  /* Check variable changed from pre-default.  */\n"
1636             printf "  gdb_assert (gdbarch->${function} != ${predefault});\n"
1637         fi
1638         printf "  if (gdbarch_debug >= 2)\n"
1639         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1640         printf "  return gdbarch->${function};\n"
1641         printf "}\n"
1642         printf "\n"
1643         printf "void\n"
1644         printf "set_gdbarch_${function} (struct gdbarch *gdbarch,\n"
1645         printf "            `echo ${function} | sed -e 's/./ /g'`  ${returntype} ${function})\n"
1646         printf "{\n"
1647         printf "  gdbarch->${function} = ${function};\n"
1648         printf "}\n"
1649     elif class_is_info_p
1650     then
1651         printf "\n"
1652         printf "${returntype}\n"
1653         printf "gdbarch_${function} (struct gdbarch *gdbarch)\n"
1654         printf "{\n"
1655         printf "  gdb_assert (gdbarch != NULL);\n"
1656         printf "  if (gdbarch_debug >= 2)\n"
1657         printf "    fprintf_unfiltered (gdb_stdlog, \"gdbarch_${function} called\\\\n\");\n"
1658         printf "  return gdbarch->${function};\n"
1659         printf "}\n"
1660     fi
1661 done
1662
1663 # All the trailing guff
1664 cat <<EOF
1665
1666
1667 /* Keep a registry of per-architecture data-pointers required by GDB
1668    modules. */
1669
1670 struct gdbarch_data
1671 {
1672   unsigned index;
1673   int init_p;
1674   gdbarch_data_pre_init_ftype *pre_init;
1675   gdbarch_data_post_init_ftype *post_init;
1676 };
1677
1678 struct gdbarch_data_registration
1679 {
1680   struct gdbarch_data *data;
1681   struct gdbarch_data_registration *next;
1682 };
1683
1684 struct gdbarch_data_registry
1685 {
1686   unsigned nr;
1687   struct gdbarch_data_registration *registrations;
1688 };
1689
1690 struct gdbarch_data_registry gdbarch_data_registry =
1691 {
1692   0, NULL,
1693 };
1694
1695 static struct gdbarch_data *
1696 gdbarch_data_register (gdbarch_data_pre_init_ftype *pre_init,
1697                        gdbarch_data_post_init_ftype *post_init)
1698 {
1699   struct gdbarch_data_registration **curr;
1700   /* Append the new registraration.  */
1701   for (curr = &gdbarch_data_registry.registrations;
1702        (*curr) != NULL;
1703        curr = &(*curr)->next);
1704   (*curr) = XMALLOC (struct gdbarch_data_registration);
1705   (*curr)->next = NULL;
1706   (*curr)->data = XMALLOC (struct gdbarch_data);
1707   (*curr)->data->index = gdbarch_data_registry.nr++;
1708   (*curr)->data->pre_init = pre_init;
1709   (*curr)->data->post_init = post_init;
1710   (*curr)->data->init_p = 1;
1711   return (*curr)->data;
1712 }
1713
1714 struct gdbarch_data *
1715 gdbarch_data_register_pre_init (gdbarch_data_pre_init_ftype *pre_init)
1716 {
1717   return gdbarch_data_register (pre_init, NULL);
1718 }
1719
1720 struct gdbarch_data *
1721 gdbarch_data_register_post_init (gdbarch_data_post_init_ftype *post_init)
1722 {
1723   return gdbarch_data_register (NULL, post_init);
1724 }
1725
1726 /* Create/delete the gdbarch data vector. */
1727
1728 static void
1729 alloc_gdbarch_data (struct gdbarch *gdbarch)
1730 {
1731   gdb_assert (gdbarch->data == NULL);
1732   gdbarch->nr_data = gdbarch_data_registry.nr;
1733   gdbarch->data = GDBARCH_OBSTACK_CALLOC (gdbarch, gdbarch->nr_data, void *);
1734 }
1735
1736 /* Initialize the current value of the specified per-architecture
1737    data-pointer. */
1738
1739 void
1740 deprecated_set_gdbarch_data (struct gdbarch *gdbarch,
1741                              struct gdbarch_data *data,
1742                              void *pointer)
1743 {
1744   gdb_assert (data->index < gdbarch->nr_data);
1745   gdb_assert (gdbarch->data[data->index] == NULL);
1746   gdb_assert (data->pre_init == NULL);
1747   gdbarch->data[data->index] = pointer;
1748 }
1749
1750 /* Return the current value of the specified per-architecture
1751    data-pointer. */
1752
1753 void *
1754 gdbarch_data (struct gdbarch *gdbarch, struct gdbarch_data *data)
1755 {
1756   gdb_assert (data->index < gdbarch->nr_data);
1757   if (gdbarch->data[data->index] == NULL)
1758     {
1759       /* The data-pointer isn't initialized, call init() to get a
1760          value.  */
1761       if (data->pre_init != NULL)
1762         /* Mid architecture creation: pass just the obstack, and not
1763            the entire architecture, as that way it isn't possible for
1764            pre-init code to refer to undefined architecture
1765            fields.  */
1766         gdbarch->data[data->index] = data->pre_init (gdbarch->obstack);
1767       else if (gdbarch->initialized_p
1768                && data->post_init != NULL)
1769         /* Post architecture creation: pass the entire architecture
1770            (as all fields are valid), but be careful to also detect
1771            recursive references.  */
1772         {
1773           gdb_assert (data->init_p);
1774           data->init_p = 0;
1775           gdbarch->data[data->index] = data->post_init (gdbarch);
1776           data->init_p = 1;
1777         }
1778       else
1779         /* The architecture initialization hasn't completed - punt -
1780          hope that the caller knows what they are doing.  Once
1781          deprecated_set_gdbarch_data has been initialized, this can be
1782          changed to an internal error.  */
1783         return NULL;
1784       gdb_assert (gdbarch->data[data->index] != NULL);
1785     }
1786   return gdbarch->data[data->index];
1787 }
1788
1789
1790 /* Keep a registry of the architectures known by GDB. */
1791
1792 struct gdbarch_registration
1793 {
1794   enum bfd_architecture bfd_architecture;
1795   gdbarch_init_ftype *init;
1796   gdbarch_dump_tdep_ftype *dump_tdep;
1797   struct gdbarch_list *arches;
1798   struct gdbarch_registration *next;
1799 };
1800
1801 static struct gdbarch_registration *gdbarch_registry = NULL;
1802
1803 static void
1804 append_name (const char ***buf, int *nr, const char *name)
1805 {
1806   *buf = xrealloc (*buf, sizeof (char**) * (*nr + 1));
1807   (*buf)[*nr] = name;
1808   *nr += 1;
1809 }
1810
1811 const char **
1812 gdbarch_printable_names (void)
1813 {
1814   /* Accumulate a list of names based on the registed list of
1815      architectures. */
1816   enum bfd_architecture a;
1817   int nr_arches = 0;
1818   const char **arches = NULL;
1819   struct gdbarch_registration *rego;
1820   for (rego = gdbarch_registry;
1821        rego != NULL;
1822        rego = rego->next)
1823     {
1824       const struct bfd_arch_info *ap;
1825       ap = bfd_lookup_arch (rego->bfd_architecture, 0);
1826       if (ap == NULL)
1827         internal_error (__FILE__, __LINE__,
1828                         _("gdbarch_architecture_names: multi-arch unknown"));
1829       do
1830         {
1831           append_name (&arches, &nr_arches, ap->printable_name);
1832           ap = ap->next;
1833         }
1834       while (ap != NULL);
1835     }
1836   append_name (&arches, &nr_arches, NULL);
1837   return arches;
1838 }
1839
1840
1841 void
1842 gdbarch_register (enum bfd_architecture bfd_architecture,
1843                   gdbarch_init_ftype *init,
1844                   gdbarch_dump_tdep_ftype *dump_tdep)
1845 {
1846   struct gdbarch_registration **curr;
1847   const struct bfd_arch_info *bfd_arch_info;
1848   /* Check that BFD recognizes this architecture */
1849   bfd_arch_info = bfd_lookup_arch (bfd_architecture, 0);
1850   if (bfd_arch_info == NULL)
1851     {
1852       internal_error (__FILE__, __LINE__,
1853                       _("gdbarch: Attempt to register unknown architecture (%d)"),
1854                       bfd_architecture);
1855     }
1856   /* Check that we haven't seen this architecture before */
1857   for (curr = &gdbarch_registry;
1858        (*curr) != NULL;
1859        curr = &(*curr)->next)
1860     {
1861       if (bfd_architecture == (*curr)->bfd_architecture)
1862         internal_error (__FILE__, __LINE__,
1863                         _("gdbarch: Duplicate registraration of architecture (%s)"),
1864                         bfd_arch_info->printable_name);
1865     }
1866   /* log it */
1867   if (gdbarch_debug)
1868     fprintf_unfiltered (gdb_stdlog, "register_gdbarch_init (%s, %s)\n",
1869                         bfd_arch_info->printable_name,
1870                         host_address_to_string (init));
1871   /* Append it */
1872   (*curr) = XMALLOC (struct gdbarch_registration);
1873   (*curr)->bfd_architecture = bfd_architecture;
1874   (*curr)->init = init;
1875   (*curr)->dump_tdep = dump_tdep;
1876   (*curr)->arches = NULL;
1877   (*curr)->next = NULL;
1878 }
1879
1880 void
1881 register_gdbarch_init (enum bfd_architecture bfd_architecture,
1882                        gdbarch_init_ftype *init)
1883 {
1884   gdbarch_register (bfd_architecture, init, NULL);
1885 }
1886
1887
1888 /* Look for an architecture using gdbarch_info.  */
1889
1890 struct gdbarch_list *
1891 gdbarch_list_lookup_by_info (struct gdbarch_list *arches,
1892                              const struct gdbarch_info *info)
1893 {
1894   for (; arches != NULL; arches = arches->next)
1895     {
1896       if (info->bfd_arch_info != arches->gdbarch->bfd_arch_info)
1897         continue;
1898       if (info->byte_order != arches->gdbarch->byte_order)
1899         continue;
1900       if (info->osabi != arches->gdbarch->osabi)
1901         continue;
1902       if (info->target_desc != arches->gdbarch->target_desc)
1903         continue;
1904       return arches;
1905     }
1906   return NULL;
1907 }
1908
1909
1910 /* Find an architecture that matches the specified INFO.  Create a new
1911    architecture if needed.  Return that new architecture.  Assumes
1912    that there is no current architecture.  */
1913
1914 static struct gdbarch *
1915 find_arch_by_info (struct gdbarch_info info)
1916 {
1917   struct gdbarch *new_gdbarch;
1918   struct gdbarch_registration *rego;
1919
1920   /* The existing architecture has been swapped out - all this code
1921      works from a clean slate.  */
1922   gdb_assert (current_gdbarch == NULL);
1923
1924   /* Fill in missing parts of the INFO struct using a number of
1925      sources: "set ..."; INFOabfd supplied; and the global
1926      defaults.  */
1927   gdbarch_info_fill (&info);
1928
1929   /* Must have found some sort of architecture. */
1930   gdb_assert (info.bfd_arch_info != NULL);
1931
1932   if (gdbarch_debug)
1933     {
1934       fprintf_unfiltered (gdb_stdlog,
1935                           "find_arch_by_info: info.bfd_arch_info %s\n",
1936                           (info.bfd_arch_info != NULL
1937                            ? info.bfd_arch_info->printable_name
1938                            : "(null)"));
1939       fprintf_unfiltered (gdb_stdlog,
1940                           "find_arch_by_info: info.byte_order %d (%s)\n",
1941                           info.byte_order,
1942                           (info.byte_order == BFD_ENDIAN_BIG ? "big"
1943                            : info.byte_order == BFD_ENDIAN_LITTLE ? "little"
1944                            : "default"));
1945       fprintf_unfiltered (gdb_stdlog,
1946                           "find_arch_by_info: info.osabi %d (%s)\n",
1947                           info.osabi, gdbarch_osabi_name (info.osabi));
1948       fprintf_unfiltered (gdb_stdlog,
1949                           "find_arch_by_info: info.abfd %s\n",
1950                           host_address_to_string (info.abfd));
1951       fprintf_unfiltered (gdb_stdlog,
1952                           "find_arch_by_info: info.tdep_info %s\n",
1953                           host_address_to_string (info.tdep_info));
1954     }
1955
1956   /* Find the tdep code that knows about this architecture.  */
1957   for (rego = gdbarch_registry;
1958        rego != NULL;
1959        rego = rego->next)
1960     if (rego->bfd_architecture == info.bfd_arch_info->arch)
1961       break;
1962   if (rego == NULL)
1963     {
1964       if (gdbarch_debug)
1965         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
1966                             "No matching architecture\n");
1967       return 0;
1968     }
1969
1970   /* Ask the tdep code for an architecture that matches "info".  */
1971   new_gdbarch = rego->init (info, rego->arches);
1972
1973   /* Did the tdep code like it?  No.  Reject the change and revert to
1974      the old architecture.  */
1975   if (new_gdbarch == NULL)
1976     {
1977       if (gdbarch_debug)
1978         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
1979                             "Target rejected architecture\n");
1980       return NULL;
1981     }
1982
1983   /* Is this a pre-existing architecture (as determined by already
1984      being initialized)?  Move it to the front of the architecture
1985      list (keeping the list sorted Most Recently Used).  */
1986   if (new_gdbarch->initialized_p)
1987     {
1988       struct gdbarch_list **list;
1989       struct gdbarch_list *this;
1990       if (gdbarch_debug)
1991         fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
1992                             "Previous architecture %s (%s) selected\n",
1993                             host_address_to_string (new_gdbarch),
1994                             new_gdbarch->bfd_arch_info->printable_name);
1995       /* Find the existing arch in the list.  */
1996       for (list = &rego->arches;
1997            (*list) != NULL && (*list)->gdbarch != new_gdbarch;
1998            list = &(*list)->next);
1999       /* It had better be in the list of architectures.  */
2000       gdb_assert ((*list) != NULL && (*list)->gdbarch == new_gdbarch);
2001       /* Unlink THIS.  */
2002       this = (*list);
2003       (*list) = this->next;
2004       /* Insert THIS at the front.  */
2005       this->next = rego->arches;
2006       rego->arches = this;
2007       /* Return it.  */
2008       return new_gdbarch;
2009     }
2010
2011   /* It's a new architecture.  */
2012   if (gdbarch_debug)
2013     fprintf_unfiltered (gdb_stdlog, "find_arch_by_info: "
2014                         "New architecture %s (%s) selected\n",
2015                         host_address_to_string (new_gdbarch),
2016                         new_gdbarch->bfd_arch_info->printable_name);
2017
2018   /* Insert the new architecture into the front of the architecture
2019      list (keep the list sorted Most Recently Used).  */
2020   {
2021     struct gdbarch_list *this = XMALLOC (struct gdbarch_list);
2022     this->next = rego->arches;
2023     this->gdbarch = new_gdbarch;
2024     rego->arches = this;
2025   }
2026
2027   /* Check that the newly installed architecture is valid.  Plug in
2028      any post init values.  */
2029   new_gdbarch->dump_tdep = rego->dump_tdep;
2030   verify_gdbarch (new_gdbarch);
2031   new_gdbarch->initialized_p = 1;
2032
2033   if (gdbarch_debug)
2034     gdbarch_dump (new_gdbarch, gdb_stdlog);
2035
2036   return new_gdbarch;
2037 }
2038
2039 struct gdbarch *
2040 gdbarch_find_by_info (struct gdbarch_info info)
2041 {
2042   struct gdbarch *new_gdbarch;
2043
2044   /* Save the previously selected architecture, setting the global to
2045      NULL.  This stops things like gdbarch->init() trying to use the
2046      previous architecture's configuration.  The previous architecture
2047      may not even be of the same architecture family.  The most recent
2048      architecture of the same family is found at the head of the
2049      rego->arches list.  */
2050   struct gdbarch *old_gdbarch = current_gdbarch;
2051   current_gdbarch = NULL;
2052
2053   /* Find the specified architecture.  */
2054   new_gdbarch = find_arch_by_info (info);
2055
2056   /* Restore the existing architecture.  */
2057   gdb_assert (current_gdbarch == NULL);
2058   current_gdbarch = old_gdbarch;
2059
2060   return new_gdbarch;
2061 }
2062
2063 /* Make the specified architecture current.  */
2064
2065 void
2066 deprecated_current_gdbarch_select_hack (struct gdbarch *new_gdbarch)
2067 {
2068   gdb_assert (new_gdbarch != NULL);
2069   gdb_assert (current_gdbarch != NULL);
2070   gdb_assert (new_gdbarch->initialized_p);
2071   current_gdbarch = new_gdbarch;
2072   target_gdbarch = new_gdbarch;
2073   observer_notify_architecture_changed (new_gdbarch);
2074   registers_changed ();
2075 }
2076
2077 extern void _initialize_gdbarch (void);
2078
2079 void
2080 _initialize_gdbarch (void)
2081 {
2082   struct cmd_list_element *c;
2083
2084   add_setshow_zinteger_cmd ("arch", class_maintenance, &gdbarch_debug, _("\\
2085 Set architecture debugging."), _("\\
2086 Show architecture debugging."), _("\\
2087 When non-zero, architecture debugging is enabled."),
2088                             NULL,
2089                             show_gdbarch_debug,
2090                             &setdebuglist, &showdebuglist);
2091 }
2092 EOF
2093
2094 # close things off
2095 exec 1>&2
2096 #../move-if-change new-gdbarch.c gdbarch.c
2097 compare_new gdbarch.c