gcc/config/cris/aout.h

   1 /* Definitions for GCC.  Part of the machine description for CRIS.
   2    Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
   3    Contributed by Axis Communications.  Written by Hans-Peter Nilsson.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 /* After the first "Node:" comment comes all preprocessor directives and
  23    attached declarations described in the info files, the "Using and
  24    Porting GCC" manual (uapgcc), in the same order as found in the "Target
  25    macros" section in the gcc-2.9x CVS edition of 2000-03-17.  FIXME: Not
  26    really, but needs an update anyway.
  27
  28    There is no generic copy-of-uapgcc comment, you'll have to see uapgcc
  29    for that.  If applicable, there is a CRIS-specific comment.  The order
  30    of macro definitions follow the order in the manual.  Every section in
  31    the manual (node in the info pages) has an introductory `Node:
  32    <subchapter>' comment.  If no macros are defined for a section, only
  33    the section-comment is present.  */
  34
  35 /* This file defines the macros for a.out that are not covered by cris.h.
  36    Many macros are copied from elfos.h and should be in some generic
  37    config/gas-aout.h.  */
  38
  39 /* Node: Driver */
  40
  41 #undef STARTFILE_SPEC
  42 #define STARTFILE_SPEC \
  43  "%{melinux:crt0.o%s}\
  44   %{!melinux:%{sim*:crt1.o%s}%{!sim*:crt0.o%s}}"
  45
  46 /* Override cris.h define.  */
  47 #undef ENDFILE_SPEC
  48
  49 #undef CRIS_CPP_SUBTARGET_SPEC
  50 #define CRIS_CPP_SUBTARGET_SPEC \
  51  "%{melinux:-D__gnu_linux__ -D__linux__ -D__unix__ -D__elinux__ -D__uclinux__\
  52     %{!ansi:%{!std=*:%{!undef:-Dlinux -Dunix -Delinux -Duclinux}}}}\
  53   %{mbest-lib-options:\
  54    %{!moverride-best-lib-options:\
  55     %{!march=*:%{!metrax*:%{!mcpu=*:-D__tune_v8 -D__CRIS_arch_tune=8}}}}}"
  56
  57 #undef CRIS_CC1_SUBTARGET_SPEC
  58 #define CRIS_CC1_SUBTARGET_SPEC \
  59  "%{mbest-lib-options:\
  60    %{!moverride-best-lib-options:\
  61     %{!march=*:%{!mcpu=*:-mtune=v8}}}}"
  62
  63 #undef CRIS_ASM_SUBTARGET_SPEC
  64 #define CRIS_ASM_SUBTARGET_SPEC "--em=crisaout"
  65
  66 #undef CRIS_LINK_SUBTARGET_SPEC
  67 #define CRIS_LINK_SUBTARGET_SPEC \
  68  "-mcrisaout\
  69   %{sim2:%{!T*:-Tdata 0x4000000 -Tbss 0x8000000}}\
  70   %{melinux:-Ur -d\
  71    %{!shlib:%{!symbolic:-Bstatic}}\
  72    %{shlib:-Bdynamic}\
  73    %{symbolic:-Bdynamic}\
  74    %{static:-Bstatic}}\
  75   %{melinux-stacksize=*:-defsym __Stacksize=%*}"
  76
  77 /* Previously controlled by target_flags.  */
  78 #undef TARGET_ELF
  79 #define TARGET_ELF 0
  80
  81 #undef CRIS_SUBTARGET_HANDLE_OPTION
  82 #define CRIS_SUBTARGET_HANDLE_OPTION(CODE, ARG, VALUE)  \
  83   do                                                    \
  84     {                                                   \
  85       switch (CODE)                                     \
  86         {                                               \
  87         case OPT_melinux:                               \
  88           target_flags                                  \
  89             |= (MASK_SVINTO                             \
  90                 + MASK_STACK_ALIGN                      \
  91                 + MASK_CONST_ALIGN                      \
  92                 + MASK_DATA_ALIGN                       \
  93                 + MASK_ETRAX4_ADD                       \
  94                 + MASK_ALIGN_BY_32);                    \
  95           break;                                        \
  96                                                         \
  97         default:                                        \
  98           break;                                        \
  99         }                                               \
 100     }                                                   \
 101   while (0)
 102
 103 #undef CRIS_SUBTARGET_VERSION
 104 #define CRIS_SUBTARGET_VERSION " - a.out"
 105
 106 #undef CRIS_SUBTARGET_DEFAULT
 107 #define CRIS_SUBTARGET_DEFAULT 0
 108
 109
 110 /* Node: Run-time Target */
 111
 112 /* For the cris-*-aout subtarget.  */
 113 #undef TARGET_OS_CPP_BUILTINS
 114 #define TARGET_OS_CPP_BUILTINS()                \
 115   do                                            \
 116     {                                           \
 117       builtin_define ("__AOUT__");              \
 118     }                                           \
 119   while (0)
 120
 121
 122 /* Node: Storage Layout */
 123
 124 /* All sections but the .bss is rounded up to a 4-byte multiple size.  */
 125 #define MAX_OFILE_ALIGNMENT 32
 126
 127
 128 /* Node: Data Output */
 129
 130 #define ESCAPES \
 131 "\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 132 \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\
 133 \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\
 134 \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\
 135 \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\
 136 \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\
 137 \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\
 138 \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"
 139
 140 /* Some svr4 assemblers have a limit on the number of characters which
 141    can appear in the operand of a .string directive.  If your assembler
 142    has such a limitation, you should define STRING_LIMIT to reflect that
 143    limit.  Note that at least some svr4 assemblers have a limit on the
 144    actual number of bytes in the double-quoted string, and that they
 145    count each character in an escape sequence as one byte.  Thus, an
 146    escape sequence like \377 would count as four bytes.
 147
 148    If your target assembler doesn't support the .string directive, you
 149    should define this to zero.  */
 150
 151 #define STRING_LIMIT    ((unsigned) 256)
 152
 153 #define STRING_ASM_OP   "\t.string\t"
 154 #define ASCII_DATA_ASM_OP       "\t.ascii\t"
 155 #define TYPE_ASM_OP     "\t.type\t"
 156 #define SIZE_ASM_OP     "\t.size\t"
 157 #define TYPE_OPERAND_FMT        "@%s"
 158
 159 /* The routine used to output NUL terminated strings.  We use a special
 160    version of this for most svr4 targets because doing so makes the
 161    generated assembly code more compact (and thus faster to assemble)
 162    as well as more readable, especially for targets like the i386
 163    (where the only alternative is to output character sequences as
 164    comma separated lists of numbers).  */
 165
 166 #define ASM_OUTPUT_LIMITED_STRING(FILE, STR)            \
 167   do                                                    \
 168     {                                                   \
 169       register const unsigned char *_limited_str =      \
 170         (const unsigned char *) (STR);                  \
 171       register unsigned ch;                             \
 172                                                         \
 173       fprintf ((FILE), "%s\"", STRING_ASM_OP);          \
 174                                                         \
 175       for (; (ch = *_limited_str); _limited_str++)      \
 176         {                                               \
 177           register int escape;                          \
 178                                                         \
 179           switch (escape = ESCAPES[ch])                 \
 180             {                                           \
 181             case 0:                                     \
 182               putc (ch, (FILE));                        \
 183               break;                                    \
 184             case 1:                                     \
 185               fprintf ((FILE), "\\%03o", ch);           \
 186               break;                                    \
 187             default:                                    \
 188               putc ('\\', (FILE));                      \
 189               putc (escape, (FILE));                    \
 190               break;                                    \
 191             }                                           \
 192         }                                               \
 193                                                         \
 194       fprintf ((FILE), "\"\n");                         \
 195     }                                                   \
 196   while (0)
 197
 198 /* The routine used to output sequences of byte values.  We use a special
 199    version of this for most svr4 targets because doing so makes the
 200    generated assembly code more compact (and thus faster to assemble)
 201    as well as more readable.  Note that if we find subparts of the
 202    character sequence which end with NUL (and which are shorter than
 203    STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING.  */
 204
 205 #undef  ASM_OUTPUT_ASCII
 206 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH)                             \
 207   do                                                                    \
 208     {                                                                   \
 209       register const unsigned char *_ascii_bytes =                      \
 210         (const unsigned char *) (STR);                                  \
 211       register const unsigned char *limit = _ascii_bytes + (LENGTH);    \
 212       register unsigned bytes_in_chunk = 0;                             \
 213                                                                         \
 214       for (; _ascii_bytes < limit; _ascii_bytes++)                      \
 215         {                                                               \
 216           register const unsigned char *p;                              \
 217                                                                         \
 218           if (bytes_in_chunk >= 60)                                     \
 219             {                                                           \
 220               fprintf ((FILE), "\"\n");                                 \
 221               bytes_in_chunk = 0;                                       \
 222             }                                                           \
 223                                                                         \
 224           for (p = _ascii_bytes; p < limit && *p != '\0'; p++)          \
 225             continue;                                                   \
 226                                                                         \
 227           if (p < limit && (p - _ascii_bytes) <= (long)STRING_LIMIT)    \
 228             {                                                           \
 229               if (bytes_in_chunk > 0)                                   \
 230                 {                                                       \
 231                   fprintf ((FILE), "\"\n");                             \
 232                   bytes_in_chunk = 0;                                   \
 233                 }                                                       \
 234                                                                         \
 235               ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes);         \
 236               _ascii_bytes = p;                                         \
 237             }                                                           \
 238           else                                                          \
 239             {                                                           \
 240               register int escape;                                      \
 241               register unsigned ch;                                     \
 242                                                                         \
 243               if (bytes_in_chunk == 0)                                  \
 244                 fprintf ((FILE), "%s\"", ASCII_DATA_ASM_OP);            \
 245                                                                         \
 246               switch (escape = ESCAPES[ch = *_ascii_bytes])             \
 247                 {                                                       \
 248                 case 0:                                                 \
 249                   putc (ch, (FILE));                                    \
 250                   bytes_in_chunk++;                                     \
 251                   break;                                                \
 252                 case 1:                                                 \
 253                   fprintf ((FILE), "\\%03o", ch);                       \
 254                   bytes_in_chunk += 4;                                  \
 255                   break;                                                \
 256                 default:                                                \
 257                   putc ('\\', (FILE));                                  \
 258                   putc (escape, (FILE));                                \
 259                   bytes_in_chunk += 2;                                  \
 260                   break;                                                \
 261                 }                                                       \
 262             }                                                           \
 263         }                                                               \
 264                                                                         \
 265       if (bytes_in_chunk > 0)                                           \
 266         fprintf ((FILE), "\"\n");                                       \
 267     }                                                                   \
 268   while (0)
 269
 270
 271 /* Node: Label Output */
 272
 273 #define SET_ASM_OP      "\t.set\t"
 274
 275 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN)  \
 276   (*targetm.asm_out.globalize_label) (FILE, XSTR (FUN, 0))
 277
 278 #define ASM_WEAKEN_LABEL(FILE, NAME)    \
 279   do                                    \
 280     {                                   \
 281       fputs ("\t.weak\t", (FILE));      \
 282       assemble_name ((FILE), (NAME));   \
 283       fputc ('\n', (FILE));             \
 284     }                                   \
 285   while (0)
 286
 287 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 288   do                                                            \
 289     {                                                           \
 290       ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");       \
 291       ASM_OUTPUT_LABEL(FILE, NAME);                             \
 292     }                                                           \
 293   while (0)
 294
 295 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)               \
 296   do                                                            \
 297     {                                                           \
 298       HOST_WIDE_INT size;                                       \
 299                                                                 \
 300       ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");         \
 301                                                                 \
 302       size_directive_output = 0;                                \
 303       if (!flag_inhibit_size_directive                          \
 304           && (DECL) && DECL_SIZE (DECL))                        \
 305         {                                                       \
 306           size_directive_output = 1;                            \
 307           size = int_size_in_bytes (TREE_TYPE (DECL));          \
 308           ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size);         \
 309         }                                                       \
 310                                                                 \
 311       ASM_OUTPUT_LABEL (FILE, NAME);                            \
 312     }                                                           \
 313   while (0)
 314
 315 #undef ASM_FINISH_DECLARE_OBJECT
 316 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)\
 317   do                                                            \
 318     {                                                           \
 319       const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);   \
 320       HOST_WIDE_INT size;                                       \
 321                                                                 \
 322       if (!flag_inhibit_size_directive                          \
 323           && DECL_SIZE (DECL)                                   \
 324           && ! AT_END && TOP_LEVEL                              \
 325           && DECL_INITIAL (DECL) == error_mark_node             \
 326           && !size_directive_output)                            \
 327         {                                                       \
 328           size_directive_output = 1;                            \
 329           size = int_size_in_bytes (TREE_TYPE (DECL));          \
 330           ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);         \
 331         }                                                       \
 332     }                                                           \
 333   while (0)
 334
 335 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)            \
 336   do                                                            \
 337     {                                                           \
 338       if (!flag_inhibit_size_directive)                         \
 339         ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                 \
 340     }                                                           \
 341   while (0)
 342
 343 /* The configure machinery invokes the assembler without options, which is
 344    not how gcc invokes it.  Without options, the multi-target assembler
 345    will probably be found, which is ELF by default.  To counter that, we
 346    need to override ELF auto-host.h config stuff which we know collides
 347    with a.out.  */
 348 #undef HAVE_GAS_HIDDEN
 349
 350
 351 /* Node: Alignment Output */
 352
 353 #define SKIP_ASM_OP     "\t.zero\t"
 354
 355 #undef  ASM_OUTPUT_SKIP
 356 #define ASM_OUTPUT_SKIP(FILE, SIZE) \
 357   fprintf (FILE, "%s%u\n", SKIP_ASM_OP, (int)(SIZE))
 358
 359 /* Node: All Debuggers */
 360
 361 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 362
 363
 364 /* Node: Misc */
 365
 366 #define HANDLE_SYSV_PRAGMA 1
 367
 368 /* In theory, this one isn't necessary, but over time, external tools have
 369    been primed on names with "." rather than "$".  */
 370 #define NO_DOLLAR_IN_LABEL
 371
 372 /* These are undocumented, but to keep a single
 373    CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON, we set this to an asm that will
 374    emit an error if ever output.  It will not be emitted for a.out modulo
 375    careless hacking.  */
 376 #define COMMON_ASM_OP   "\t.err\t"
 377 #define LOCAL_ASM_OP    "\t.err\t"
 378
 379 #if defined(__CRIS__) && defined (__AOUT__) && defined (IN_GCC)
 380
 381 #define CRIS_ABI_VERSION_SYMBOL_STRING ".$CRIS_ABI_V2"
 382
 383 /* Make all a.out library functions have undefined references to the
 384    .$CRIS_ABI_V2 symbol, so it will be picked up.  Used by GDB.  GDB has
 385    a bug with reading a.out symbols; it does not see the GNU weak
 386    extensions, so we can't have .$CRIS_ABI_V2 weak.  Weak.  */
 387 __asm__ (".set .$abi_referer," CRIS_ABI_VERSION_SYMBOL_STRING);
 388 #endif
 389
 390 /*
 391  * Local variables:
 392  * eval: (c-set-style "gnu")
 393  * indent-tabs-mode: t
 394  * End:
 395  */