gcc/config/svr4.h

   1 /* svr4.h  --  operating system specific defines to be used when
   2    targeting GCC for some generic System V Release 4 system.
   3    Copyright (C) 1991 Free Software Foundation, Inc.
   4
   5    Written by Ron Guilmette (rfg@ncd.com).
   6
   7 This file is part of GNU CC.
   8
   9 GNU CC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 GNU CC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GNU CC; see the file COPYING.  If not, write to
  21 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  22
  23    To use this file, make up a file with a name like:
  24
  25         ?????svr4.h
  26
  27    where ????? is replaced by the name of the basic hardware that you
  28    are targeting for.  Then, in the file ?????svr4.h, put something
  29    like:
  30
  31         #include "?????.h"
  32         #include "svr4.h"
  33
  34    followed by any really system-specific defines (or overrides of
  35    defines) which you find that you need.  For example, CPP_PREDEFINES
  36    is defined here with only the defined -Dunix and -DSVR4.  You should
  37    probably override that in your target-specific ?????svr4.h file
  38    with a set of defines that includes these, but also contains an
  39    appropriate define for the type of hardware that you are targeting.
  40 */
  41
  42 /* For the sake of libgcc2.c, indicate target supports atexit.  */
  43 #define HAVE_ATEXIT
  44
  45 /* Cpp, assembler, linker, library, and startfile spec's.  */
  46
  47 /* This defines which switch letters take arguments.  On svr4, most of
  48    the normal cases (defined in gcc.c) apply, and we also have -h* and
  49    -z* options (for the linker).  Note however that there is no such
  50    thing as a -T option for svr4.  */
  51
  52 #define SWITCH_TAKES_ARG(CHAR) \
  53   (   (CHAR) == 'D' \
  54    || (CHAR) == 'U' \
  55    || (CHAR) == 'o' \
  56    || (CHAR) == 'e' \
  57    || (CHAR) == 'u' \
  58    || (CHAR) == 'I' \
  59    || (CHAR) == 'm' \
  60    || (CHAR) == 'L' \
  61    || (CHAR) == 'A' \
  62    || (CHAR) == 'h' \
  63    || (CHAR) == 'z')
  64
  65 /* This defines which multi-letter switches take arguments.  On svr4,
  66    there are no such switches except those implemented by GCC itself.  */
  67
  68 #define WORD_SWITCH_TAKES_ARG(STR)                      \
  69  (!strcmp (STR, "include") || !strcmp (STR, "imacros")  \
  70   || !strcmp (STR, "aux-info"))
  71
  72 /* You should redefine CPP_PREDEFINES in any file which includes this one.
  73    The definition should be appropriate for the type of target system
  74    involved, and it should include any -A (assertion) options which are
  75    appropriate for the given target system.  */
  76 #undef CPP_PREDEFINES
  77
  78 /* Provide an ASM_SPEC appropriate for svr4.  Here we try to support as
  79    many of the specialized svr4 assembler options as seems reasonable,
  80    given that there are certain options which we can't (or shouldn't)
  81    support directly due to the fact that they conflict with other options
  82    for other svr4 tools (e.g. ld) or with other options for GCC itself.
  83    For example, we don't support the -o (output file) or -R (remove
  84    input file) options because GCC already handles these things.  We
  85    also don't support the -m (run m4) option for the assembler because
  86    that conflicts with the -m (produce load map) option of the svr4
  87    linker.  We do however allow passing arbitrary options to the svr4
  88    assembler via the -Wa, option.
  89
  90    Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
  91    option.
  92 */
  93
  94 #undef ASM_SPEC
  95 #define ASM_SPEC \
  96   "%{V} %{v:%{!V:-V}} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
  97
  98 /* svr4 assemblers need the `-' (indicating input from stdin) to come after
  99    the -o option (and its argument) for some reason.  If we try to put it
 100    before the -o option, the assembler will try to read the file named as
 101    the output file in the -o option as an input file (after it has already
 102    written some stuff to it) and the binary stuff contained therein will
 103    cause totally confuse the assembler, resulting in many spurious error
 104    messages.  */
 105
 106 #undef ASM_FINAL_SPEC
 107 #define ASM_FINAL_SPEC "%{pipe:-}"
 108
 109 /* Under svr4, the normal location of the various *crt*.o files is the
 110    /usr/ccs/lib directory.  */
 111
 112 #undef MD_STARTFILE_PREFIX
 113 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/"
 114
 115 /* Provide a LIB_SPEC appropriate for svr4.  Here we tack on the default
 116    standard C library (unless we are building a shared library) followed by
 117    our own magical crtend.o file (see crtstuff.c) which provides part of
 118    the support for getting C++ file-scope static object constructed before
 119    entering `main', followed by the normal svr3/svr4 "finalizer" file,
 120    which is either `gcrtn.o' or `crtn.o'.  */
 121
 122 #undef  LIB_SPEC
 123 #define LIB_SPEC \
 124   "%{!shared:%{!symbolic:-lc}} \
 125   crtend.o%s \
 126   %{!shared:%{!symbolic:%{pg:gcrtn.o}%{!pg:crtn.o%s}}}"
 127
 128 /* Provide a LINK_SPEC appropriate for svr4.  Here we provide support
 129    for the special GCC options -static, -shared, and -symbolic which
 130    allow us to link things in one of these three modes by applying the
 131    appropriate combinations of options at link-time.  We also provide
 132    support here for as many of the other svr4 linker options as seems
 133    reasonable, given that some of them conflict with options for other
 134    svr4 tools (e.g. the assembler).  In particular, we do support the
 135    -h*, -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*,
 136    -l*, -o*, -r, -s, -u*, and -L* options are directly supported
 137    by gcc.c itself.  We don't directly support the -m (generate load
 138    map) option because that conflicts with the -m (run m4) option of
 139    the svr4 assembler.  We also don't directly support the svr4 linker's
 140    -I* or -M* options because these conflict with existing GCC options.
 141    We do however allow passing arbitrary options to the svr4 linker
 142    via the -Wl, option.  We don't support the svr4 linker's -a option
 143    at all because it is totally useless and because it conflicts with
 144    GCC's own -a option.
 145
 146    Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
 147
 148    When the -G link option is used (-shared and -symbolic) a final link is
 149    not being done.  */
 150
 151 #undef  LINK_SPEC
 152 #define LINK_SPEC "%{h*} %{V} %{v:%{!V:-V}} \
 153                    %{b} %{Wl,*:%*} \
 154                    %{static:-dn -Bstatic} \
 155                    %{shared:-G -dy} \
 156                    %{symbolic:-Bsymbolic -G -dy} \
 157                    %{G:-G} \
 158                    %{YP,*} \
 159                    %{!YP,*:%{p:-Y P,/usr/ccs/lib/libp:/usr/lib/libp:/usr/ccs/lib:/usr/lib} \
 160                     %{!p:-Y P,/usr/ccs/lib:/usr/lib}} \
 161                    %{Qy:} %{!Qn:-Qy}"
 162
 163 /* Gcc automatically adds in one of the files /usr/ccs/lib/values-Xc.o,
 164    /usr/ccs/lib/values-Xa.o, or /usr/ccs/lib/values-Xt.o for each final
 165    link step (depending upon the other gcc options selected, such as
 166    -traditional and -ansi).  These files each contain one (initialized)
 167    copy of a special variable called `_lib_version'.  Each one of these
 168    files has `_lib_version' initialized to a different (enum) value.
 169    The SVR4 library routines query the value of `_lib_version' at run
 170    to decide how they should behave.  Specifically, they decide (based
 171    upon the value of `_lib_version') if they will act in a strictly ANSI
 172    conforming manner or not.
 173 */
 174
 175 #undef  STARTFILE_SPEC
 176 #define STARTFILE_SPEC "%{!shared: \
 177                          %{!symbolic: \
 178                           %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} \
 179                           %{pg:gcrti.o%s}%{!pg:crti.o%s} \
 180                           %{ansi:values-Xc.o%s} \
 181                           %{!ansi: \
 182                            %{traditional:values-Xt.o%s} \
 183                            %{!traditional:values-Xa.o%s}}}} crtbegin.o%s"
 184
 185 /* Attach a special .ident directive to the end of the file to identify
 186    the version of GCC which compiled this code.  The format of the
 187    .ident string is patterned after the ones produced by native svr4
 188    C compilers.  */
 189
 190 #define ASM_FILE_END(FILE)                                      \
 191 do {                                                            \
 192      fprintf ((FILE), "\t.ident\t\"GCC: (GNU) %s\"\n",          \
 193               version_string);                                  \
 194    } while (0)
 195
 196 /* Allow #sccs in preprocessor.  */
 197
 198 #define SCCS_DIRECTIVE
 199
 200 /* Output #ident as a .ident.  */
 201
 202 #define ASM_OUTPUT_IDENT(FILE, NAME) \
 203   fprintf (FILE, "\t.ident \"%s\"\n", NAME);
 204
 205 /* Use periods rather than dollar signs in special g++ assembler names.  */
 206
 207 #define NO_DOLLAR_IN_LABEL
 208
 209 /* Writing `int' for a bitfield forces int alignment for the structure.  */
 210
 211 #define PCC_BITFIELD_TYPE_MATTERS 1
 212
 213 /* Implicit library calls should use memcpy, not bcopy, etc.  */
 214
 215 #define TARGET_MEM_FUNCTIONS
 216
 217 /* System V Release 4 uses DWARF debugging info.  */
 218
 219 #define DWARF_DEBUGGING_INFO
 220
 221 /* The numbers used to denote specific machine registers in the System V
 222    Release 4 DWARF debugging information are quite likely to be totally
 223    different from the numbers used in BSD stabs debugging information
 224    for the same kind of target machine.  Thus, we undefine the macro
 225    DBX_REGISTER_NUMBER here as an extra inducement to get people to
 226    provide proper machine-specific definitions of DBX_REGISTER_NUMBER
 227    (which is also used to provide DWARF registers numbers in dwarfout.c)
 228    in their tm.h files which include this file.  */
 229
 230 #undef DBX_REGISTER_NUMBER
 231
 232 /* Define the actual types of some ANSI-mandated types.  (These
 233    definitions should work for most SVR4 systems).  */
 234
 235 #undef SIZE_TYPE
 236 #define SIZE_TYPE "unsigned int"
 237
 238 #undef PTRDIFF_TYPE
 239 #define PTRDIFF_TYPE "int"
 240
 241 #undef WCHAR_TYPE
 242 #define WCHAR_TYPE "long int"
 243
 244 #undef WCHAR_TYPE_SIZE
 245 #define WCHAR_TYPE_SIZE BITS_PER_WORD
 246
 247 /* This causes trouble, because it requires the host machine
 248    to support ANSI C.  */
 249 /* #define MULTIBYTE_CHARS */
 250
 251 #undef ASM_BYTE_OP
 252 #define ASM_BYTE_OP     "\t.byte"
 253
 254 /* This is how to begin an assembly language file.  Most svr4 assemblers want
 255    at least a .file directive to come first, and some want to see a .version
 256    directive come right after that.  Here we just establish a default
 257    which generates only the .file directive.  If you need a .version
 258    directive for any specific target, you should override this definition
 259    in the target-specific file which includes this one.  */
 260
 261 #undef ASM_FILE_START
 262 #define ASM_FILE_START(FILE)                                    \
 263   output_file_directive ((FILE), main_input_filename)
 264
 265 /* This is how to allocate empty space in some section.  The .zero
 266    pseudo-op is used for this on most svr4 assemblers.  */
 267
 268 #define SKIP_ASM_OP     ".zero"
 269
 270 #undef ASM_OUTPUT_SKIP
 271 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
 272   fprintf (FILE, "\t%s\t%u\n", SKIP_ASM_OP, (SIZE))
 273
 274 /* This is how to output a reference to a user-level label named NAME.
 275    `assemble_name' uses this.
 276
 277    For System V Release 4 the convention is *not* to prepend a leading
 278    underscore onto user-level symbol names.  */
 279
 280 #undef ASM_OUTPUT_LABELREF
 281 #define ASM_OUTPUT_LABELREF(FILE,NAME) fprintf (FILE, "%s", NAME)
 282
 283 /* This is how to output an internal numbered label where
 284    PREFIX is the class of label and NUM is the number within the class.
 285
 286    For most svr4 systems, the convention is that any symbol which begins
 287    with a period is not put into the linker symbol table by the assembler.  */
 288
 289 #undef ASM_OUTPUT_INTERNAL_LABEL
 290 #define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM)                    \
 291 do {                                                                    \
 292   fprintf (FILE, ".%s%d:\n", PREFIX, NUM);                              \
 293 } while (0)
 294
 295 /* This is how to store into the string LABEL
 296    the symbol_ref name of an internal numbered label where
 297    PREFIX is the class of label and NUM is the number within the class.
 298    This is suitable for output with `assemble_name'.
 299
 300    For most svr4 systems, the convention is that any symbol which begins
 301    with a period is not put into the linker symbol table by the assembler.  */
 302
 303 #undef ASM_GENERATE_INTERNAL_LABEL
 304 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM)                 \
 305 do {                                                                    \
 306   sprintf (LABEL, "*.%s%d", PREFIX, NUM);                               \
 307 } while (0)
 308
 309 /* The standard SVR4 assembler seems to require that certain builtin
 310    library routines (e.g. .udiv) be explicitly declared as .globl
 311    in each assembly file where they are referenced.  */
 312
 313 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN)                          \
 314   ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))
 315
 316 /* This says how to output assembler code to declare an
 317    uninitialized external linkage data object.  Under SVR4,
 318    the linker seems to want the alignment of data objects
 319    to depend on their types.  We do exactly that here.  */
 320
 321 #define COMMON_ASM_OP   ".comm"
 322
 323 #undef ASM_OUTPUT_ALIGNED_COMMON
 324 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
 325 do {                                                                    \
 326   fprintf ((FILE), "\t%s\t", COMMON_ASM_OP);                            \
 327   assemble_name ((FILE), (NAME));                                       \
 328   fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT);        \
 329 } while (0)
 330
 331 /* This says how to output assembler code to declare an
 332    uninitialized internal linkage data object.  Under SVR4,
 333    the linker seems to want the alignment of data objects
 334    to depend on their types.  We do exactly that here.  */
 335
 336 #define LOCAL_ASM_OP    ".local"
 337
 338 #undef ASM_OUTPUT_ALIGNED_LOCAL
 339 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 340 do {                                                                    \
 341   fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP);                             \
 342   assemble_name ((FILE), (NAME));                                       \
 343   fprintf ((FILE), "\n");                                               \
 344   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 345 } while (0)
 346
 347 /* This is the pseudo-op used to generate a 32-bit word of data with a
 348    specific value in some section.  This is the same for all known svr4
 349    assemblers.  */
 350
 351 #define INT_ASM_OP              ".long"
 352
 353 /* This is the pseudo-op used to generate a contiguous sequence of byte
 354    values from a double-quoted string WITHOUT HAVING A TERMINATING NUL
 355    AUTOMATICALLY APPENDED.  This is the same for most svr4 assemblers.  */
 356
 357 #undef ASCII_DATA_ASM_OP
 358 #define ASCII_DATA_ASM_OP       ".ascii"
 359
 360 /* Support const sections and the ctors and dtors sections for g++.
 361    Note that there appears to be two different ways to support const
 362    sections at the moment.  You can either #define the symbol
 363    READONLY_DATA_SECTION (giving it some code which switches to the
 364    readonly data section) or else you can #define the symbols
 365    EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
 366    SELECT_RTX_SECTION.  We do both here just to be on the safe side.  */
 367
 368 #define USE_CONST_SECTION       1
 369
 370 #define CONST_SECTION_ASM_OP    ".section\t.rodata"
 371 #define CTORS_SECTION_ASM_OP    ".section\t.ctors,\"a\",@progbits"
 372 #define DTORS_SECTION_ASM_OP    ".section\t.dtors,\"a\",@progbits"
 373
 374 /* On svr4, we *do* have support for the .init section, and we can put
 375    stuff in there to be executed before `main'.  We let crtstuff.c and
 376    other files know this by defining the following symbol.  The definition
 377    says how to change sections to the .init section.  This is the same
 378    for all know svr4 assemblers.  */
 379
 380 #define INIT_SECTION_ASM_OP     ".section\t.init"
 381
 382 /* A default list of other sections which we might be "in" at any given
 383    time.  For targets that use additional sections (e.g. .tdesc) you
 384    should override this definition in the target-specific file which
 385    includes this file.  */
 386
 387 #undef EXTRA_SECTIONS
 388 #define EXTRA_SECTIONS in_const, in_ctors, in_dtors
 389
 390 /* A default list of extra section function definitions.  For targets
 391    that use additional sections (e.g. .tdesc) you should override this
 392    definition in the target-specific file which includes this file.  */
 393
 394 #undef EXTRA_SECTION_FUNCTIONS
 395 #define EXTRA_SECTION_FUNCTIONS                                         \
 396   CONST_SECTION_FUNCTION                                                \
 397   CTORS_SECTION_FUNCTION                                                \
 398   DTORS_SECTION_FUNCTION
 399
 400 #define READONLY_DATA_SECTION() const_section ()
 401
 402 extern void text_section();
 403
 404 #define CONST_SECTION_FUNCTION                                          \
 405 void                                                                    \
 406 const_section ()                                                        \
 407 {                                                                       \
 408   if (!USE_CONST_SECTION)                                               \
 409     text_section();                                                     \
 410   else if (in_section != in_const)                                      \
 411     {                                                                   \
 412       fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP);             \
 413       in_section = in_const;                                            \
 414     }                                                                   \
 415 }
 416
 417 #define CTORS_SECTION_FUNCTION                                          \
 418 void                                                                    \
 419 ctors_section ()                                                        \
 420 {                                                                       \
 421   if (in_section != in_ctors)                                           \
 422     {                                                                   \
 423       fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP);             \
 424       in_section = in_ctors;                                            \
 425     }                                                                   \
 426 }
 427
 428 #define DTORS_SECTION_FUNCTION                                          \
 429 void                                                                    \
 430 dtors_section ()                                                        \
 431 {                                                                       \
 432   if (in_section != in_dtors)                                           \
 433     {                                                                   \
 434       fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP);             \
 435       in_section = in_dtors;                                            \
 436     }                                                                   \
 437 }
 438
 439 /* A C statement (sans semicolon) to output an element in the table of
 440    global constructors.  */
 441 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME)                               \
 442   do {                                                                  \
 443     ctors_section ();                                                   \
 444     fprintf (FILE, "\t%s\t ", INT_ASM_OP);                              \
 445     assemble_name (FILE, NAME);                                         \
 446     fprintf (FILE, "\n");                                               \
 447   } while (0)
 448
 449 /* A C statement (sans semicolon) to output an element in the table of
 450    global destructors.  */
 451 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME)                                \
 452   do {                                                                  \
 453     dtors_section ();                                                   \
 454     fprintf (FILE, "\t%s\t ", INT_ASM_OP);                              \
 455     assemble_name (FILE, NAME);                                         \
 456     fprintf (FILE, "\n");                                               \
 457   } while (0)
 458
 459 /* A C statement or statements to switch to the appropriate
 460    section for output of DECL.  DECL is either a `VAR_DECL' node
 461    or a constant of some sort.  RELOC indicates whether forming
 462    the initial value of DECL requires link-time relocations.  */
 463
 464 #define SELECT_SECTION(DECL,RELOC)                                      \
 465 {                                                                       \
 466   if (TREE_CODE (DECL) == STRING_CST)                                   \
 467     {                                                                   \
 468       if (! flag_writable_strings)                                      \
 469         const_section ();                                               \
 470       else                                                              \
 471         data_section ();                                                \
 472     }                                                                   \
 473   else if (TREE_CODE (DECL) == VAR_DECL)                                \
 474     {                                                                   \
 475       if ((flag_pic && RELOC)                                           \
 476           || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL))         \
 477         data_section ();                                                \
 478       else                                                              \
 479         const_section ();                                               \
 480     }                                                                   \
 481   else                                                                  \
 482     const_section ();                                                   \
 483 }
 484
 485 /* A C statement or statements to switch to the appropriate
 486    section for output of RTX in mode MODE.  RTX is some kind
 487    of constant in RTL.  The argument MODE is redundant except
 488    in the case of a `const_int' rtx.  Currently, these always
 489    go into the const section.  */
 490
 491 #undef SELECT_RTX_SECTION
 492 #define SELECT_RTX_SECTION(MODE,RTX) const_section()
 493
 494 /* Define the strings used for the special svr4 .type and .size directives.
 495    These strings generally do not vary from one system running svr4 to
 496    another, but if a given system (e.g. m88k running svr) needs to use
 497    different pseudo-op names for these, they may be overridden in the
 498    file which includes this one.  */
 499
 500 #define TYPE_ASM_OP     ".type"
 501 #define SIZE_ASM_OP     ".size"
 502
 503 /* The following macro defines the format used to output the second
 504    operand of the .type assembler directive.  Different svr4 assemblers
 505    expect various different forms for this operand.  The one given here
 506    is just a default.  You may need to override it in your machine-
 507    specific tm.h file (depending upon the particulars of your assembler).  */
 508
 509 #define TYPE_OPERAND_FMT        "@%s"
 510
 511 /* Write the extra assembler code needed to declare a function's result.
 512    Most svr4 assemblers don't require any special declaration of the
 513    result value, but there are exceptions.  */
 514
 515 #ifndef ASM_DECLARE_RESULT
 516 #define ASM_DECLARE_RESULT(FILE, RESULT)
 517 #endif
 518
 519 /* These macros generate the special .type and .size directives which
 520    are used to set the corresponding fields of the linker symbol table
 521    entries in an ELF object file under SVR4.  These macros also output
 522    the starting labels for the relevant functions/objects.  */
 523
 524 /* Write the extra assembler code needed to declare a function properly.
 525    Some svr4 assemblers need to also have something extra said about the
 526    function's return value.  We allow for that here.  */
 527
 528 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)                     \
 529   do {                                                                  \
 530     fprintf (FILE, "\t%s\t ", TYPE_ASM_OP);                             \
 531     assemble_name (FILE, NAME);                                         \
 532     putc (',', FILE);                                                   \
 533     fprintf (FILE, TYPE_OPERAND_FMT, "function");                       \
 534     putc ('\n', FILE);                                                  \
 535     ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));                      \
 536     ASM_OUTPUT_LABEL(FILE, NAME);                                       \
 537   } while (0)
 538
 539 /* Write the extra assembler code needed to declare an object properly.  */
 540
 541 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                       \
 542   do {                                                                  \
 543     fprintf (FILE, "\t%s\t ", TYPE_ASM_OP);                             \
 544     assemble_name (FILE, NAME);                                         \
 545     putc (',', FILE);                                                   \
 546     fprintf (FILE, TYPE_OPERAND_FMT, "object");                         \
 547     putc ('\n', FILE);                                                  \
 548     if (!flag_inhibit_size_directive)                                   \
 549       {                                                                 \
 550         fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);                         \
 551         assemble_name (FILE, NAME);                                     \
 552         fprintf (FILE, ",%d\n",  int_size_in_bytes (TREE_TYPE (decl))); \
 553       }                                                                 \
 554     ASM_OUTPUT_LABEL(FILE, NAME);                                       \
 555   } while (0)
 556
 557 /* This is how to declare the size of a function.  */
 558
 559 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)                    \
 560   do {                                                                  \
 561     if (!flag_inhibit_size_directive)                                   \
 562       {                                                                 \
 563         char label[256];                                                \
 564         static int labelno;                                             \
 565         labelno++;                                                      \
 566         ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno);            \
 567         ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno);               \
 568         fprintf (FILE, "\t%s\t ", SIZE_ASM_OP);                         \
 569         assemble_name (FILE, (FNAME));                                  \
 570         fprintf (FILE, ",");                                            \
 571         assemble_name (FILE, label);                                    \
 572         fprintf (FILE, "-");                                            \
 573         ASM_OUTPUT_LABELREF (FILE, (FNAME));                            \
 574         putc ('\n', FILE);                                              \
 575       }                                                                 \
 576   } while (0)
 577
 578 /* A table of bytes codes used by the ASM_OUTPUT_ASCII and
 579    ASM_OUTPUT_LIMITED_STRING macros.  Each byte in the table
 580    corresponds to a particular byte value [0..255].  For any
 581    given byte value, if the value in the corresponding table
 582    position is zero, the given character can be output directly.
 583    If the table value is 1, the byte must be output as a \ooo
 584    octal escape.  If the tables value is anything else, then the
 585    byte value should be output as a \ followed by the value
 586    in the table.  Note that we can use standard UN*X escape
 587    sequences for many control characters, but we don't use
 588    \a to represent BEL because some svr4 assemblers (e.g. on
 589    the i386) don't know about that.   */
 590
 591 #define ESCAPES \
 592 "\1\1\1\1\1\1\1\1btnvfr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 593 \0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 594 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\
 595 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\
 596 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 597 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 598 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 599 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1"
 600
 601 /* Some svr4 assemblers have a limit on the number of characters which
 602    can appear in the operand of a .string directive.  If your assembler
 603    has such a limitation, you should define STRING_LIMIT to reflect that
 604    limit.  Note that at least some svr4 assemblers have a limit on the
 605    actual number of bytes in the double-quoted string, and that they
 606    count each character in an escape sequence as one byte.  Thus, an
 607    escape sequence like \377 would count as four bytes.
 608
 609    If your target assembler doesn't support the .string directive, you
 610    should define this to zero.
 611 */
 612
 613 #define STRING_LIMIT    ((unsigned) 256)
 614
 615 #define STRING_ASM_OP   ".string"
 616
 617 /* The routine used to output NUL terminated strings.  We use a special
 618    version of this for most svr4 targets because doing so makes the
 619    generated assembly code more compact (and thus faster to assemble)
 620    as well as more readable, especially for targets like the i386
 621    (where the only alternative is to output character sequences as
 622    comma separated lists of numbers).   */
 623
 624 #define ASM_OUTPUT_LIMITED_STRING(FILE, STR)                            \
 625   do                                                                    \
 626     {                                                                   \
 627       register unsigned char *_limited_str = (unsigned char *) (STR);   \
 628       register unsigned ch;                                             \
 629       fprintf ((FILE), "\t%s\t\"", STRING_ASM_OP);                      \
 630       for (; ch = *_limited_str; _limited_str++)                        \
 631         {                                                               \
 632           register int escape;                                          \
 633           switch (escape = ESCAPES[ch])                                 \
 634             {                                                           \
 635             case 0:                                                     \
 636               putc (ch, (FILE));                                        \
 637               break;                                                    \
 638             case 1:                                                     \
 639               fprintf ((FILE), "\\%03o", ch);                           \
 640               break;                                                    \
 641             default:                                                    \
 642               putc ('\\', (FILE));                                      \
 643               putc (escape, (FILE));                                    \
 644               break;                                                    \
 645             }                                                           \
 646         }                                                               \
 647       fprintf ((FILE), "\"\n");                                         \
 648     }                                                                   \
 649   while (0)
 650
 651 /* The routine used to output sequences of byte values.  We use a special
 652    version of this for most svr4 targets because doing so makes the
 653    generated assembly code more compact (and thus faster to assemble)
 654    as well as more readable.  Note that if we find subparts of the
 655    character sequence which end with NUL (and which are shorter than
 656    STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING.  */
 657
 658 #undef ASM_OUTPUT_ASCII
 659 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH)                             \
 660   do                                                                    \
 661     {                                                                   \
 662       register unsigned char *_ascii_bytes = (unsigned char *) (STR);   \
 663       register unsigned char *limit = _ascii_bytes + (LENGTH);          \
 664       register unsigned bytes_in_chunk = 0;                             \
 665       for (; _ascii_bytes < limit; _ascii_bytes++)                      \
 666         {                                                               \
 667           register unsigned char *p;                                    \
 668           if (bytes_in_chunk >= 60)                                     \
 669             {                                                           \
 670               fprintf ((FILE), "\"\n");                                 \
 671               bytes_in_chunk = 0;                                       \
 672             }                                                           \
 673           for (p = _ascii_bytes; p < limit && *p != '\0'; p++)          \
 674             continue;                                                   \
 675           if (p < limit && (p - _ascii_bytes) <= STRING_LIMIT)          \
 676             {                                                           \
 677               if (bytes_in_chunk > 0)                                   \
 678                 {                                                       \
 679                   fprintf ((FILE), "\"\n");                             \
 680                   bytes_in_chunk = 0;                                   \
 681                 }                                                       \
 682               ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes);         \
 683               _ascii_bytes = p;                                         \
 684             }                                                           \
 685           else                                                          \
 686             {                                                           \
 687               register int escape;                                      \
 688               register unsigned ch;                                     \
 689               if (bytes_in_chunk == 0)                                  \
 690                 fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP);        \
 691               switch (escape = ESCAPES[ch = *_ascii_bytes])             \
 692                 {                                                       \
 693                 case 0:                                                 \
 694                   putc (ch, (FILE));                                    \
 695                   bytes_in_chunk++;                                     \
 696                   break;                                                \
 697                 case 1:                                                 \
 698                   fprintf ((FILE), "\\%03o", ch);                       \
 699                   bytes_in_chunk += 4;                                  \
 700                   break;                                                \
 701                 default:                                                \
 702                   putc ('\\', (FILE));                                  \
 703                   putc (escape, (FILE));                                \
 704                   bytes_in_chunk += 2;                                  \
 705                   break;                                                \
 706                 }                                                       \
 707             }                                                           \
 708         }                                                               \
 709       if (bytes_in_chunk > 0)                                           \
 710         fprintf ((FILE), "\"\n");                                       \
 711     }                                                                   \
 712   while (0)