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